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5bd4f169 | 1 | /* PowerPC64-specific support for 64-bit ELF. |
82704155 | 2 | Copyright (C) 1999-2019 Free Software Foundation, Inc. |
5bd4f169 AM |
3 | Written by Linus Nordberg, Swox AB <info@swox.com>, |
4 | based on elf32-ppc.c by Ian Lance Taylor. | |
32ca9640 | 5 | Largely rewritten by Alan Modra. |
5bd4f169 | 6 | |
ae9a127f | 7 | This file is part of BFD, the Binary File Descriptor library. |
5bd4f169 | 8 | |
ae9a127f NC |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 11 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 12 | (at your option) any later version. |
5bd4f169 | 13 | |
ae9a127f NC |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
5bd4f169 | 18 | |
4ce794b7 AM |
19 | You should have received a copy of the GNU General Public License along |
20 | with this program; if not, write to the Free Software Foundation, Inc., | |
3e110533 | 21 | 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
5bd4f169 | 22 | |
cd123cb7 | 23 | |
4ce794b7 AM |
24 | /* The 64-bit PowerPC ELF ABI may be found at |
25 | http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and | |
26 | http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */ | |
5bd4f169 | 27 | |
3db64b00 | 28 | #include "sysdep.h" |
183e98be | 29 | #include <stdarg.h> |
5bd4f169 | 30 | #include "bfd.h" |
5bd4f169 AM |
31 | #include "bfdlink.h" |
32 | #include "libbfd.h" | |
33 | #include "elf-bfd.h" | |
04c9666a | 34 | #include "elf/ppc64.h" |
5d1634d7 | 35 | #include "elf64-ppc.h" |
58d180e8 | 36 | #include "dwarf2.h" |
5bd4f169 | 37 | |
805fc799 | 38 | static bfd_reloc_status_type ppc64_elf_ha_reloc |
4ce794b7 | 39 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
2441e016 AM |
40 | static bfd_reloc_status_type ppc64_elf_branch_reloc |
41 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
805fc799 | 42 | static bfd_reloc_status_type ppc64_elf_brtaken_reloc |
4ce794b7 | 43 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
805fc799 | 44 | static bfd_reloc_status_type ppc64_elf_sectoff_reloc |
4ce794b7 | 45 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
805fc799 | 46 | static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc |
4ce794b7 | 47 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
805fc799 | 48 | static bfd_reloc_status_type ppc64_elf_toc_reloc |
4ce794b7 | 49 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
805fc799 | 50 | static bfd_reloc_status_type ppc64_elf_toc_ha_reloc |
4ce794b7 | 51 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
805fc799 | 52 | static bfd_reloc_status_type ppc64_elf_toc64_reloc |
4ce794b7 | 53 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
805fc799 | 54 | static bfd_reloc_status_type ppc64_elf_unhandled_reloc |
4ce794b7 | 55 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
2441e016 | 56 | static bfd_vma opd_entry_value |
aef36ac1 | 57 | (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean); |
5bd4f169 | 58 | |
6d00b590 | 59 | #define TARGET_LITTLE_SYM powerpc_elf64_le_vec |
ad8e1ba5 | 60 | #define TARGET_LITTLE_NAME "elf64-powerpcle" |
6d00b590 | 61 | #define TARGET_BIG_SYM powerpc_elf64_vec |
ad8e1ba5 AM |
62 | #define TARGET_BIG_NAME "elf64-powerpc" |
63 | #define ELF_ARCH bfd_arch_powerpc | |
ae95ffa6 | 64 | #define ELF_TARGET_ID PPC64_ELF_DATA |
ad8e1ba5 AM |
65 | #define ELF_MACHINE_CODE EM_PPC64 |
66 | #define ELF_MAXPAGESIZE 0x10000 | |
702d1671 AM |
67 | #define ELF_COMMONPAGESIZE 0x1000 |
68 | #define ELF_RELROPAGESIZE ELF_MAXPAGESIZE | |
ad8e1ba5 AM |
69 | #define elf_info_to_howto ppc64_elf_info_to_howto |
70 | ||
71 | #define elf_backend_want_got_sym 0 | |
72 | #define elf_backend_want_plt_sym 0 | |
73 | #define elf_backend_plt_alignment 3 | |
74 | #define elf_backend_plt_not_loaded 1 | |
ad8e1ba5 | 75 | #define elf_backend_got_header_size 8 |
5474d94f | 76 | #define elf_backend_want_dynrelro 1 |
ad8e1ba5 AM |
77 | #define elf_backend_can_gc_sections 1 |
78 | #define elf_backend_can_refcount 1 | |
79 | #define elf_backend_rela_normal 1 | |
64f52338 | 80 | #define elf_backend_dtrel_excludes_plt 1 |
6bfdb61b | 81 | #define elf_backend_default_execstack 0 |
ad8e1ba5 | 82 | |
e717da7e | 83 | #define bfd_elf64_mkobject ppc64_elf_mkobject |
ad8e1ba5 | 84 | #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup |
aa374f67 | 85 | #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup |
ee67d69a AM |
86 | #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data |
87 | #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data | |
ad8e1ba5 AM |
88 | #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook |
89 | #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create | |
90e3cdf2 | 90 | #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab |
aa374f67 | 91 | #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms |
8c5b4e52 | 92 | #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections |
ad8e1ba5 AM |
93 | |
94 | #define elf_backend_object_p ppc64_elf_object_p | |
d37c89e5 AM |
95 | #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus |
96 | #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo | |
183e98be | 97 | #define elf_backend_write_core_note ppc64_elf_write_core_note |
9d19e4fd | 98 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
ad8e1ba5 | 99 | #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol |
555cd476 | 100 | #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook |
f6c7c3e8 | 101 | #define elf_backend_check_directives ppc64_elf_before_check_relocs |
e5034e59 | 102 | #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed |
8387904d | 103 | #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup |
ad8e1ba5 | 104 | #define elf_backend_check_relocs ppc64_elf_check_relocs |
c0e331c7 | 105 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
74f0fb50 | 106 | #define elf_backend_gc_keep ppc64_elf_gc_keep |
64d03ab5 | 107 | #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref |
ad8e1ba5 | 108 | #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook |
ad8e1ba5 AM |
109 | #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol |
110 | #define elf_backend_hide_symbol ppc64_elf_hide_symbol | |
9f296da3 | 111 | #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym |
ad8e1ba5 AM |
112 | #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust |
113 | #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections | |
a345bc8d | 114 | #define elf_backend_hash_symbol ppc64_elf_hash_symbol |
74541ad4 | 115 | #define elf_backend_init_index_section _bfd_elf_init_2_index_sections |
60124e18 | 116 | #define elf_backend_action_discarded ppc64_elf_action_discarded |
ad8e1ba5 AM |
117 | #define elf_backend_relocate_section ppc64_elf_relocate_section |
118 | #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol | |
119 | #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class | |
120 | #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections | |
754021d0 | 121 | #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook |
29ef7005 | 122 | #define elf_backend_special_sections ppc64_elf_special_sections |
6911b7dc | 123 | #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute |
8c5b4e52 | 124 | #define elf_backend_merge_symbol ppc64_elf_merge_symbol |
bce964aa | 125 | #define elf_backend_get_reloc_section bfd_get_section_by_name |
ad8e1ba5 | 126 | |
5bd4f169 AM |
127 | /* The name of the dynamic interpreter. This is put in the .interp |
128 | section. */ | |
129 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
130 | ||
131 | /* The size in bytes of an entry in the procedure linkage table. */ | |
b9e5796b | 132 | #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8) |
2d7ad24e | 133 | #define LOCAL_PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 16 : 8) |
5bd4f169 AM |
134 | |
135 | /* The initial size of the plt reserved for the dynamic linker. */ | |
b9e5796b | 136 | #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16) |
5bd4f169 | 137 | |
a078d95a AM |
138 | /* Offsets to some stack save slots. */ |
139 | #define STK_LR 16 | |
140 | #define STK_TOC(htab) (htab->opd_abi ? 40 : 24) | |
eb8d7fda | 141 | /* This one is dodgy. ELFv2 does not have a linker word, so use the |
a078d95a AM |
142 | CR save slot. Used only by optimised __tls_get_addr call stub, |
143 | relying on __tls_get_addr_opt not saving CR.. */ | |
144 | #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8) | |
145 | ||
5bd4f169 | 146 | /* TOC base pointers offset from start of TOC. */ |
411e1bfb | 147 | #define TOC_BASE_OFF 0x8000 |
a27e685f AM |
148 | /* TOC base alignment. */ |
149 | #define TOC_BASE_ALIGN 256 | |
411e1bfb AM |
150 | |
151 | /* Offset of tp and dtp pointers from start of TLS block. */ | |
152 | #define TP_OFFSET 0x7000 | |
153 | #define DTP_OFFSET 0x8000 | |
5bd4f169 | 154 | |
ad8e1ba5 AM |
155 | /* .plt call stub instructions. The normal stub is like this, but |
156 | sometimes the .plt entry crosses a 64k boundary and we need to | |
71a39c98 | 157 | insert an addi to adjust r11. */ |
a078d95a | 158 | #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */ |
71a39c98 AM |
159 | #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */ |
160 | #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */ | |
161 | #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */ | |
162 | #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */ | |
163 | #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */ | |
5d1634d7 AM |
164 | #define BCTR 0x4e800420 /* bctr */ |
165 | ||
07d6d2b8 | 166 | #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */ |
05d0e962 AM |
167 | #define ADDI_R12_R11 0x398b0000 /* addi %r12,%r11,off@l */ |
168 | #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */ | |
07d6d2b8 AM |
169 | #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */ |
170 | #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */ | |
171 | ||
172 | #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */ | |
173 | #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */ | |
174 | #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */ | |
175 | #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */ | |
176 | #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */ | |
177 | #define BNECTR 0x4ca20420 /* bnectr+ */ | |
178 | #define BNECTR_P4 0x4ce20420 /* bnectr+ */ | |
794e51c0 | 179 | |
71a39c98 | 180 | #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */ |
ac2df442 | 181 | #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */ |
07d6d2b8 | 182 | #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */ |
ac2df442 | 183 | |
07d6d2b8 AM |
184 | #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */ |
185 | #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */ | |
186 | #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */ | |
ad8e1ba5 | 187 | |
07d6d2b8 | 188 | #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */ |
05d0e962 | 189 | #define LIS_R12 0x3d800000 /* lis %r12,xxx@ha */ |
006589cf AM |
190 | #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */ |
191 | #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */ | |
05d0e962 | 192 | #define ADDIS_R12_R11 0x3d8b0000 /* addis %r12,%r11,xxx@ha */ |
a345bc8d | 193 | #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */ |
05d0e962 AM |
194 | #define ORIS_R12_R12_0 0x658c0000 /* oris %r12,%r12,xxx@hi */ |
195 | #define ORI_R12_R12_0 0x618c0000 /* ori %r12,%r12,xxx@l */ | |
07d6d2b8 | 196 | #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */ |
05d0e962 AM |
197 | #define SLDI_R12_R12_32 0x799c07c6 /* sldi %r12,%r12,32 */ |
198 | #define LDX_R12_R11_R12 0x7d8b602a /* ldx %r12,%r11,%r12 */ | |
199 | #define ADD_R12_R11_R12 0x7d8b6214 /* add %r12,%r11,%r12 */ | |
a345bc8d | 200 | |
9e390558 AM |
201 | /* __glink_PLTresolve stub instructions. We enter with the index in R0. */ |
202 | #define GLINK_PLTRESOLVE_SIZE(htab) \ | |
407aa07c | 203 | (8u + (htab->opd_abi ? 11 * 4 : 14 * 4)) |
ee4bf8d2 AM |
204 | /* 0: */ |
205 | /* .quad plt0-1f */ | |
206 | /* __glink: */ | |
207 | #define MFLR_R12 0x7d8802a6 /* mflr %12 */ | |
208 | #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */ | |
209 | /* 1: */ | |
210 | #define MFLR_R11 0x7d6802a6 /* mflr %11 */ | |
71a39c98 | 211 | /* ld %2,(0b-1b)(%11) */ |
ee4bf8d2 | 212 | #define MTLR_R12 0x7d8803a6 /* mtlr %12 */ |
71a39c98 AM |
213 | #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */ |
214 | /* ld %12,0(%11) */ | |
215 | /* ld %2,8(%11) */ | |
216 | /* mtctr %12 */ | |
217 | /* ld %11,16(%11) */ | |
ee4bf8d2 | 218 | /* bctr */ |
b9e5796b AM |
219 | #define MFLR_R0 0x7c0802a6 /* mflr %r0 */ |
220 | #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */ | |
221 | #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */ | |
222 | #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */ | |
223 | #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */ | |
5d1634d7 AM |
224 | |
225 | /* Pad with this. */ | |
226 | #define NOP 0x60000000 | |
227 | ||
721956f4 AM |
228 | /* Some other nops. */ |
229 | #define CROR_151515 0x4def7b82 | |
230 | #define CROR_313131 0x4ffffb82 | |
231 | ||
cedb70c5 | 232 | /* .glink entries for the first 32k functions are two instructions. */ |
5d1634d7 AM |
233 | #define LI_R0_0 0x38000000 /* li %r0,0 */ |
234 | #define B_DOT 0x48000000 /* b . */ | |
235 | ||
236 | /* After that, we need two instructions to load the index, followed by | |
237 | a branch. */ | |
238 | #define LIS_R0_0 0x3c000000 /* lis %r0,0 */ | |
10ed1bba | 239 | #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */ |
41bd81ab | 240 | |
deb0e272 AM |
241 | /* Instructions used by the save and restore reg functions. */ |
242 | #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */ | |
243 | #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */ | |
244 | #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */ | |
245 | #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */ | |
82bd7b59 AM |
246 | #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */ |
247 | #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */ | |
deb0e272 AM |
248 | #define LI_R12_0 0x39800000 /* li %r12,0 */ |
249 | #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */ | |
250 | #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */ | |
251 | #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */ | |
82bd7b59 AM |
252 | #define BLR 0x4e800020 /* blr */ |
253 | ||
41bd81ab AM |
254 | /* Since .opd is an array of descriptors and each entry will end up |
255 | with identical R_PPC64_RELATIVE relocs, there is really no need to | |
256 | propagate .opd relocs; The dynamic linker should be taught to | |
1e2f5b6e | 257 | relocate .opd without reloc entries. */ |
41bd81ab AM |
258 | #ifndef NO_OPD_RELOCS |
259 | #define NO_OPD_RELOCS 0 | |
260 | #endif | |
810d4e75 | 261 | |
a4b6fadd AM |
262 | #ifndef ARRAY_SIZE |
263 | #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) | |
264 | #endif | |
265 | ||
810d4e75 AM |
266 | static inline int |
267 | abiversion (bfd *abfd) | |
268 | { | |
269 | return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI; | |
270 | } | |
271 | ||
272 | static inline void | |
273 | set_abiversion (bfd *abfd, int ver) | |
274 | { | |
275 | elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI; | |
276 | elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI; | |
277 | } | |
5bd4f169 AM |
278 | \f |
279 | /* Relocation HOWTO's. */ | |
46807bf4 AM |
280 | /* Like other ELF RELA targets that don't apply multiple |
281 | field-altering relocations to the same localation, src_mask is | |
282 | always zero and pcrel_offset is the same as pc_relative. | |
283 | PowerPC can always use a zero bitpos, even when the field is not at | |
284 | the LSB. For example, a REL24 could use rightshift=2, bisize=24 | |
285 | and bitpos=2 which matches the ABI description, or as we do here, | |
286 | rightshift=0, bitsize=26 and bitpos=0. */ | |
287 | #define HOW(type, size, bitsize, mask, rightshift, pc_relative, \ | |
288 | complain, special_func) \ | |
289 | HOWTO (type, rightshift, size, bitsize, pc_relative, 0, \ | |
290 | complain_overflow_ ## complain, special_func, \ | |
291 | #type, FALSE, 0, mask, pc_relative) | |
292 | ||
04c9666a | 293 | static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max]; |
5bd4f169 | 294 | |
f3185997 NC |
295 | static reloc_howto_type ppc64_elf_howto_raw[] = |
296 | { | |
5bd4f169 | 297 | /* This reloc does nothing. */ |
46807bf4 AM |
298 | HOW (R_PPC64_NONE, 3, 0, 0, 0, FALSE, dont, |
299 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
300 | |
301 | /* A standard 32 bit relocation. */ | |
46807bf4 AM |
302 | HOW (R_PPC64_ADDR32, 2, 32, 0xffffffff, 0, FALSE, bitfield, |
303 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
304 | |
305 | /* An absolute 26 bit branch; the lower two bits must be zero. | |
306 | FIXME: we don't check that, we just clear them. */ | |
46807bf4 AM |
307 | HOW (R_PPC64_ADDR24, 2, 26, 0x03fffffc, 0, FALSE, bitfield, |
308 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
309 | |
310 | /* A standard 16 bit relocation. */ | |
46807bf4 AM |
311 | HOW (R_PPC64_ADDR16, 1, 16, 0xffff, 0, FALSE, bitfield, |
312 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
313 | |
314 | /* A 16 bit relocation without overflow. */ | |
46807bf4 AM |
315 | HOW (R_PPC64_ADDR16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
316 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
317 | |
318 | /* Bits 16-31 of an address. */ | |
46807bf4 AM |
319 | HOW (R_PPC64_ADDR16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
320 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
321 | |
322 | /* Bits 16-31 of an address, plus 1 if the contents of the low 16 | |
323 | bits, treated as a signed number, is negative. */ | |
46807bf4 AM |
324 | HOW (R_PPC64_ADDR16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
325 | ppc64_elf_ha_reloc), | |
5bd4f169 AM |
326 | |
327 | /* An absolute 16 bit branch; the lower two bits must be zero. | |
328 | FIXME: we don't check that, we just clear them. */ | |
46807bf4 AM |
329 | HOW (R_PPC64_ADDR14, 2, 16, 0x0000fffc, 0, FALSE, signed, |
330 | ppc64_elf_branch_reloc), | |
5bd4f169 AM |
331 | |
332 | /* An absolute 16 bit branch, for which bit 10 should be set to | |
333 | indicate that the branch is expected to be taken. The lower two | |
334 | bits must be zero. */ | |
46807bf4 AM |
335 | HOW (R_PPC64_ADDR14_BRTAKEN, 2, 16, 0x0000fffc, 0, FALSE, signed, |
336 | ppc64_elf_brtaken_reloc), | |
5bd4f169 AM |
337 | |
338 | /* An absolute 16 bit branch, for which bit 10 should be set to | |
339 | indicate that the branch is not expected to be taken. The lower | |
340 | two bits must be zero. */ | |
46807bf4 AM |
341 | HOW (R_PPC64_ADDR14_BRNTAKEN, 2, 16, 0x0000fffc, 0, FALSE, signed, |
342 | ppc64_elf_brtaken_reloc), | |
5bd4f169 AM |
343 | |
344 | /* A relative 26 bit branch; the lower two bits must be zero. */ | |
46807bf4 AM |
345 | HOW (R_PPC64_REL24, 2, 26, 0x03fffffc, 0, TRUE, signed, |
346 | ppc64_elf_branch_reloc), | |
5bd4f169 | 347 | |
05d0e962 | 348 | /* A variant of R_PPC64_REL24, used when r2 is not the toc pointer. */ |
46807bf4 AM |
349 | HOW (R_PPC64_REL24_NOTOC, 2, 26, 0x03fffffc, 0, TRUE, signed, |
350 | ppc64_elf_branch_reloc), | |
05d0e962 | 351 | |
5bd4f169 | 352 | /* A relative 16 bit branch; the lower two bits must be zero. */ |
46807bf4 AM |
353 | HOW (R_PPC64_REL14, 2, 16, 0x0000fffc, 0, TRUE, signed, |
354 | ppc64_elf_branch_reloc), | |
5bd4f169 AM |
355 | |
356 | /* A relative 16 bit branch. Bit 10 should be set to indicate that | |
357 | the branch is expected to be taken. The lower two bits must be | |
358 | zero. */ | |
46807bf4 AM |
359 | HOW (R_PPC64_REL14_BRTAKEN, 2, 16, 0x0000fffc, 0, TRUE, signed, |
360 | ppc64_elf_brtaken_reloc), | |
5bd4f169 AM |
361 | |
362 | /* A relative 16 bit branch. Bit 10 should be set to indicate that | |
363 | the branch is not expected to be taken. The lower two bits must | |
364 | be zero. */ | |
46807bf4 AM |
365 | HOW (R_PPC64_REL14_BRNTAKEN, 2, 16, 0x0000fffc, 0, TRUE, signed, |
366 | ppc64_elf_brtaken_reloc), | |
5bd4f169 AM |
367 | |
368 | /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the | |
369 | symbol. */ | |
46807bf4 AM |
370 | HOW (R_PPC64_GOT16, 1, 16, 0xffff, 0, FALSE, signed, |
371 | ppc64_elf_unhandled_reloc), | |
5bd4f169 AM |
372 | |
373 | /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for | |
374 | the symbol. */ | |
46807bf4 AM |
375 | HOW (R_PPC64_GOT16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
376 | ppc64_elf_unhandled_reloc), | |
5bd4f169 AM |
377 | |
378 | /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for | |
379 | the symbol. */ | |
46807bf4 AM |
380 | HOW (R_PPC64_GOT16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
381 | ppc64_elf_unhandled_reloc), | |
5bd4f169 AM |
382 | |
383 | /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for | |
384 | the symbol. */ | |
46807bf4 AM |
385 | HOW (R_PPC64_GOT16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
386 | ppc64_elf_unhandled_reloc), | |
5bd4f169 AM |
387 | |
388 | /* This is used only by the dynamic linker. The symbol should exist | |
389 | both in the object being run and in some shared library. The | |
390 | dynamic linker copies the data addressed by the symbol from the | |
391 | shared library into the object, because the object being | |
392 | run has to have the data at some particular address. */ | |
46807bf4 AM |
393 | HOW (R_PPC64_COPY, 0, 0, 0, 0, FALSE, dont, |
394 | ppc64_elf_unhandled_reloc), | |
5bd4f169 AM |
395 | |
396 | /* Like R_PPC64_ADDR64, but used when setting global offset table | |
397 | entries. */ | |
46807bf4 AM |
398 | HOW (R_PPC64_GLOB_DAT, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
399 | ppc64_elf_unhandled_reloc), | |
5bd4f169 AM |
400 | |
401 | /* Created by the link editor. Marks a procedure linkage table | |
402 | entry for a symbol. */ | |
46807bf4 AM |
403 | HOW (R_PPC64_JMP_SLOT, 0, 0, 0, 0, FALSE, dont, |
404 | ppc64_elf_unhandled_reloc), | |
5bd4f169 AM |
405 | |
406 | /* Used only by the dynamic linker. When the object is run, this | |
407 | doubleword64 is set to the load address of the object, plus the | |
408 | addend. */ | |
46807bf4 AM |
409 | HOW (R_PPC64_RELATIVE, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
410 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
411 | |
412 | /* Like R_PPC64_ADDR32, but may be unaligned. */ | |
46807bf4 AM |
413 | HOW (R_PPC64_UADDR32, 2, 32, 0xffffffff, 0, FALSE, bitfield, |
414 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
415 | |
416 | /* Like R_PPC64_ADDR16, but may be unaligned. */ | |
46807bf4 AM |
417 | HOW (R_PPC64_UADDR16, 1, 16, 0xffff, 0, FALSE, bitfield, |
418 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
419 | |
420 | /* 32-bit PC relative. */ | |
46807bf4 AM |
421 | HOW (R_PPC64_REL32, 2, 32, 0xffffffff, 0, TRUE, signed, |
422 | bfd_elf_generic_reloc), | |
5bd4f169 | 423 | |
10ed1bba | 424 | /* 32-bit relocation to the symbol's procedure linkage table. */ |
46807bf4 AM |
425 | HOW (R_PPC64_PLT32, 2, 32, 0xffffffff, 0, FALSE, bitfield, |
426 | ppc64_elf_unhandled_reloc), | |
5bd4f169 AM |
427 | |
428 | /* 32-bit PC relative relocation to the symbol's procedure linkage table. | |
429 | FIXME: R_PPC64_PLTREL32 not supported. */ | |
46807bf4 AM |
430 | HOW (R_PPC64_PLTREL32, 2, 32, 0xffffffff, 0, TRUE, signed, |
431 | ppc64_elf_unhandled_reloc), | |
5bd4f169 AM |
432 | |
433 | /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for | |
434 | the symbol. */ | |
46807bf4 AM |
435 | HOW (R_PPC64_PLT16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
436 | ppc64_elf_unhandled_reloc), | |
5bd4f169 AM |
437 | |
438 | /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for | |
439 | the symbol. */ | |
46807bf4 AM |
440 | HOW (R_PPC64_PLT16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
441 | ppc64_elf_unhandled_reloc), | |
5bd4f169 AM |
442 | |
443 | /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for | |
444 | the symbol. */ | |
46807bf4 AM |
445 | HOW (R_PPC64_PLT16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
446 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 447 | |
c061c2d8 | 448 | /* 16-bit section relative relocation. */ |
46807bf4 AM |
449 | HOW (R_PPC64_SECTOFF, 1, 16, 0xffff, 0, FALSE, signed, |
450 | ppc64_elf_sectoff_reloc), | |
5bd4f169 | 451 | |
c061c2d8 | 452 | /* Like R_PPC64_SECTOFF, but no overflow warning. */ |
46807bf4 AM |
453 | HOW (R_PPC64_SECTOFF_LO, 1, 16, 0xffff, 0, FALSE, dont, |
454 | ppc64_elf_sectoff_reloc), | |
5bd4f169 AM |
455 | |
456 | /* 16-bit upper half section relative relocation. */ | |
46807bf4 AM |
457 | HOW (R_PPC64_SECTOFF_HI, 1, 16, 0xffff, 16, FALSE, signed, |
458 | ppc64_elf_sectoff_reloc), | |
5bd4f169 AM |
459 | |
460 | /* 16-bit upper half adjusted section relative relocation. */ | |
46807bf4 AM |
461 | HOW (R_PPC64_SECTOFF_HA, 1, 16, 0xffff, 16, FALSE, signed, |
462 | ppc64_elf_sectoff_ha_reloc), | |
5bd4f169 | 463 | |
04c9666a | 464 | /* Like R_PPC64_REL24 without touching the two least significant bits. */ |
46807bf4 AM |
465 | HOW (R_PPC64_REL30, 2, 30, 0xfffffffc, 2, TRUE, dont, |
466 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
467 | |
468 | /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */ | |
469 | ||
470 | /* A standard 64-bit relocation. */ | |
46807bf4 AM |
471 | HOW (R_PPC64_ADDR64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
472 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
473 | |
474 | /* The bits 32-47 of an address. */ | |
46807bf4 AM |
475 | HOW (R_PPC64_ADDR16_HIGHER, 1, 16, 0xffff, 32, FALSE, dont, |
476 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
477 | |
478 | /* The bits 32-47 of an address, plus 1 if the contents of the low | |
479 | 16 bits, treated as a signed number, is negative. */ | |
46807bf4 AM |
480 | HOW (R_PPC64_ADDR16_HIGHERA, 1, 16, 0xffff, 32, FALSE, dont, |
481 | ppc64_elf_ha_reloc), | |
5bd4f169 AM |
482 | |
483 | /* The bits 48-63 of an address. */ | |
46807bf4 AM |
484 | HOW (R_PPC64_ADDR16_HIGHEST, 1, 16, 0xffff, 48, FALSE, dont, |
485 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
486 | |
487 | /* The bits 48-63 of an address, plus 1 if the contents of the low | |
488 | 16 bits, treated as a signed number, is negative. */ | |
46807bf4 AM |
489 | HOW (R_PPC64_ADDR16_HIGHESTA, 1, 16, 0xffff, 48, FALSE, dont, |
490 | ppc64_elf_ha_reloc), | |
5bd4f169 AM |
491 | |
492 | /* Like ADDR64, but may be unaligned. */ | |
46807bf4 AM |
493 | HOW (R_PPC64_UADDR64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
494 | bfd_elf_generic_reloc), | |
5bd4f169 AM |
495 | |
496 | /* 64-bit relative relocation. */ | |
46807bf4 AM |
497 | HOW (R_PPC64_REL64, 4, 64, 0xffffffffffffffffULL, 0, TRUE, dont, |
498 | bfd_elf_generic_reloc), | |
5bd4f169 | 499 | |
cedb70c5 | 500 | /* 64-bit relocation to the symbol's procedure linkage table. */ |
46807bf4 AM |
501 | HOW (R_PPC64_PLT64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
502 | ppc64_elf_unhandled_reloc), | |
5bd4f169 AM |
503 | |
504 | /* 64-bit PC relative relocation to the symbol's procedure linkage | |
505 | table. */ | |
506 | /* FIXME: R_PPC64_PLTREL64 not supported. */ | |
46807bf4 AM |
507 | HOW (R_PPC64_PLTREL64, 4, 64, 0xffffffffffffffffULL, 0, TRUE, dont, |
508 | ppc64_elf_unhandled_reloc), | |
5bd4f169 AM |
509 | |
510 | /* 16 bit TOC-relative relocation. */ | |
5bd4f169 | 511 | /* R_PPC64_TOC16 47 half16* S + A - .TOC. */ |
46807bf4 AM |
512 | HOW (R_PPC64_TOC16, 1, 16, 0xffff, 0, FALSE, signed, |
513 | ppc64_elf_toc_reloc), | |
5bd4f169 AM |
514 | |
515 | /* 16 bit TOC-relative relocation without overflow. */ | |
5bd4f169 | 516 | /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */ |
46807bf4 AM |
517 | HOW (R_PPC64_TOC16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
518 | ppc64_elf_toc_reloc), | |
5bd4f169 AM |
519 | |
520 | /* 16 bit TOC-relative relocation, high 16 bits. */ | |
5bd4f169 | 521 | /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */ |
46807bf4 AM |
522 | HOW (R_PPC64_TOC16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
523 | ppc64_elf_toc_reloc), | |
5bd4f169 AM |
524 | |
525 | /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the | |
526 | contents of the low 16 bits, treated as a signed number, is | |
527 | negative. */ | |
5bd4f169 | 528 | /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */ |
46807bf4 AM |
529 | HOW (R_PPC64_TOC16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
530 | ppc64_elf_toc_ha_reloc), | |
5bd4f169 AM |
531 | |
532 | /* 64-bit relocation; insert value of TOC base (.TOC.). */ | |
5bd4f169 | 533 | /* R_PPC64_TOC 51 doubleword64 .TOC. */ |
46807bf4 AM |
534 | HOW (R_PPC64_TOC, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
535 | ppc64_elf_toc64_reloc), | |
5bd4f169 AM |
536 | |
537 | /* Like R_PPC64_GOT16, but also informs the link editor that the | |
538 | value to relocate may (!) refer to a PLT entry which the link | |
539 | editor (a) may replace with the symbol value. If the link editor | |
540 | is unable to fully resolve the symbol, it may (b) create a PLT | |
541 | entry and store the address to the new PLT entry in the GOT. | |
542 | This permits lazy resolution of function symbols at run time. | |
543 | The link editor may also skip all of this and just (c) emit a | |
544 | R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */ | |
545 | /* FIXME: R_PPC64_PLTGOT16 not implemented. */ | |
46807bf4 AM |
546 | HOW (R_PPC64_PLTGOT16, 1, 16, 0xffff, 0, FALSE,signed, |
547 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
548 | |
549 | /* Like R_PPC64_PLTGOT16, but without overflow. */ | |
550 | /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ | |
46807bf4 AM |
551 | HOW (R_PPC64_PLTGOT16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
552 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
553 | |
554 | /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */ | |
555 | /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */ | |
46807bf4 AM |
556 | HOW (R_PPC64_PLTGOT16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
557 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
558 | |
559 | /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus | |
560 | 1 if the contents of the low 16 bits, treated as a signed number, | |
561 | is negative. */ | |
562 | /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */ | |
46807bf4 AM |
563 | HOW (R_PPC64_PLTGOT16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
564 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
565 | |
566 | /* Like R_PPC64_ADDR16, but for instructions with a DS field. */ | |
46807bf4 AM |
567 | HOW (R_PPC64_ADDR16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
568 | bfd_elf_generic_reloc), | |
411e1bfb AM |
569 | |
570 | /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */ | |
46807bf4 AM |
571 | HOW (R_PPC64_ADDR16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
572 | bfd_elf_generic_reloc), | |
411e1bfb AM |
573 | |
574 | /* Like R_PPC64_GOT16, but for instructions with a DS field. */ | |
46807bf4 AM |
575 | HOW (R_PPC64_GOT16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
576 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
577 | |
578 | /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */ | |
46807bf4 AM |
579 | HOW (R_PPC64_GOT16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
580 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
581 | |
582 | /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */ | |
46807bf4 AM |
583 | HOW (R_PPC64_PLT16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
584 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
585 | |
586 | /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */ | |
46807bf4 AM |
587 | HOW (R_PPC64_SECTOFF_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
588 | ppc64_elf_sectoff_reloc), | |
411e1bfb AM |
589 | |
590 | /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */ | |
46807bf4 AM |
591 | HOW (R_PPC64_SECTOFF_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
592 | ppc64_elf_sectoff_reloc), | |
411e1bfb AM |
593 | |
594 | /* Like R_PPC64_TOC16, but for instructions with a DS field. */ | |
46807bf4 AM |
595 | HOW (R_PPC64_TOC16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
596 | ppc64_elf_toc_reloc), | |
411e1bfb AM |
597 | |
598 | /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */ | |
46807bf4 AM |
599 | HOW (R_PPC64_TOC16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
600 | ppc64_elf_toc_reloc), | |
411e1bfb AM |
601 | |
602 | /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */ | |
603 | /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */ | |
46807bf4 AM |
604 | HOW (R_PPC64_PLTGOT16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
605 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
606 | |
607 | /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */ | |
608 | /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ | |
46807bf4 AM |
609 | HOW (R_PPC64_PLTGOT16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
610 | ppc64_elf_unhandled_reloc), | |
411e1bfb | 611 | |
727fc41e | 612 | /* Marker relocs for TLS. */ |
46807bf4 AM |
613 | HOW (R_PPC64_TLS, 2, 32, 0, 0, FALSE, dont, |
614 | bfd_elf_generic_reloc), | |
615 | ||
616 | HOW (R_PPC64_TLSGD, 2, 32, 0, 0, FALSE, dont, | |
617 | bfd_elf_generic_reloc), | |
618 | ||
619 | HOW (R_PPC64_TLSLD, 2, 32, 0, 0, FALSE, dont, | |
620 | bfd_elf_generic_reloc), | |
727fc41e | 621 | |
23cedd1d AM |
622 | /* Marker reloc for optimizing r2 save in prologue rather than on |
623 | each plt call stub. */ | |
46807bf4 AM |
624 | HOW (R_PPC64_TOCSAVE, 2, 32, 0, 0, FALSE, dont, |
625 | bfd_elf_generic_reloc), | |
3b421ab3 | 626 | |
23cedd1d | 627 | /* Marker relocs on inline plt call instructions. */ |
46807bf4 AM |
628 | HOW (R_PPC64_PLTSEQ, 2, 32, 0, 0, FALSE, dont, |
629 | bfd_elf_generic_reloc), | |
630 | ||
631 | HOW (R_PPC64_PLTCALL, 2, 32, 0, 0, FALSE, dont, | |
632 | bfd_elf_generic_reloc), | |
23cedd1d | 633 | |
411e1bfb AM |
634 | /* Computes the load module index of the load module that contains the |
635 | definition of its TLS sym. */ | |
46807bf4 AM |
636 | HOW (R_PPC64_DTPMOD64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
637 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
638 | |
639 | /* Computes a dtv-relative displacement, the difference between the value | |
640 | of sym+add and the base address of the thread-local storage block that | |
641 | contains the definition of sym, minus 0x8000. */ | |
46807bf4 AM |
642 | HOW (R_PPC64_DTPREL64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
643 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
644 | |
645 | /* A 16 bit dtprel reloc. */ | |
46807bf4 AM |
646 | HOW (R_PPC64_DTPREL16, 1, 16, 0xffff, 0, FALSE, signed, |
647 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
648 | |
649 | /* Like DTPREL16, but no overflow. */ | |
46807bf4 AM |
650 | HOW (R_PPC64_DTPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
651 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
652 | |
653 | /* Like DTPREL16_LO, but next higher group of 16 bits. */ | |
46807bf4 AM |
654 | HOW (R_PPC64_DTPREL16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
655 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
656 | |
657 | /* Like DTPREL16_HI, but adjust for low 16 bits. */ | |
46807bf4 AM |
658 | HOW (R_PPC64_DTPREL16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
659 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
660 | |
661 | /* Like DTPREL16_HI, but next higher group of 16 bits. */ | |
46807bf4 AM |
662 | HOW (R_PPC64_DTPREL16_HIGHER, 1, 16, 0xffff, 32, FALSE, dont, |
663 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
664 | |
665 | /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */ | |
46807bf4 AM |
666 | HOW (R_PPC64_DTPREL16_HIGHERA, 1, 16, 0xffff, 32, FALSE, dont, |
667 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
668 | |
669 | /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */ | |
46807bf4 AM |
670 | HOW (R_PPC64_DTPREL16_HIGHEST, 1, 16, 0xffff, 48, FALSE, dont, |
671 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
672 | |
673 | /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */ | |
46807bf4 AM |
674 | HOW (R_PPC64_DTPREL16_HIGHESTA, 1, 16, 0xffff, 48, FALSE, dont, |
675 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
676 | |
677 | /* Like DTPREL16, but for insns with a DS field. */ | |
46807bf4 AM |
678 | HOW (R_PPC64_DTPREL16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
679 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
680 | |
681 | /* Like DTPREL16_DS, but no overflow. */ | |
46807bf4 AM |
682 | HOW (R_PPC64_DTPREL16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
683 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
684 | |
685 | /* Computes a tp-relative displacement, the difference between the value of | |
686 | sym+add and the value of the thread pointer (r13). */ | |
46807bf4 AM |
687 | HOW (R_PPC64_TPREL64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
688 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
689 | |
690 | /* A 16 bit tprel reloc. */ | |
46807bf4 AM |
691 | HOW (R_PPC64_TPREL16, 1, 16, 0xffff, 0, FALSE, signed, |
692 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
693 | |
694 | /* Like TPREL16, but no overflow. */ | |
46807bf4 AM |
695 | HOW (R_PPC64_TPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
696 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
697 | |
698 | /* Like TPREL16_LO, but next higher group of 16 bits. */ | |
46807bf4 AM |
699 | HOW (R_PPC64_TPREL16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
700 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
701 | |
702 | /* Like TPREL16_HI, but adjust for low 16 bits. */ | |
46807bf4 AM |
703 | HOW (R_PPC64_TPREL16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
704 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
705 | |
706 | /* Like TPREL16_HI, but next higher group of 16 bits. */ | |
46807bf4 AM |
707 | HOW (R_PPC64_TPREL16_HIGHER, 1, 16, 0xffff, 32, FALSE, dont, |
708 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
709 | |
710 | /* Like TPREL16_HIGHER, but adjust for low 16 bits. */ | |
46807bf4 AM |
711 | HOW (R_PPC64_TPREL16_HIGHERA, 1, 16, 0xffff, 32, FALSE, dont, |
712 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
713 | |
714 | /* Like TPREL16_HIGHER, but next higher group of 16 bits. */ | |
46807bf4 AM |
715 | HOW (R_PPC64_TPREL16_HIGHEST, 1, 16, 0xffff, 48, FALSE, dont, |
716 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
717 | |
718 | /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */ | |
46807bf4 AM |
719 | HOW (R_PPC64_TPREL16_HIGHESTA, 1, 16, 0xffff, 48, FALSE, dont, |
720 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
721 | |
722 | /* Like TPREL16, but for insns with a DS field. */ | |
46807bf4 AM |
723 | HOW (R_PPC64_TPREL16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
724 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
725 | |
726 | /* Like TPREL16_DS, but no overflow. */ | |
46807bf4 AM |
727 | HOW (R_PPC64_TPREL16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
728 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
729 | |
730 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, | |
731 | with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset | |
732 | to the first entry relative to the TOC base (r2). */ | |
46807bf4 AM |
733 | HOW (R_PPC64_GOT_TLSGD16, 1, 16, 0xffff, 0, FALSE, signed, |
734 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 735 | |
411e1bfb | 736 | /* Like GOT_TLSGD16, but no overflow. */ |
46807bf4 AM |
737 | HOW (R_PPC64_GOT_TLSGD16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
738 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 739 | |
411e1bfb | 740 | /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ |
46807bf4 AM |
741 | HOW (R_PPC64_GOT_TLSGD16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
742 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 743 | |
411e1bfb | 744 | /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ |
46807bf4 AM |
745 | HOW (R_PPC64_GOT_TLSGD16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
746 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 747 | |
411e1bfb AM |
748 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
749 | with values (sym+add)@dtpmod and zero, and computes the offset to the | |
750 | first entry relative to the TOC base (r2). */ | |
46807bf4 AM |
751 | HOW (R_PPC64_GOT_TLSLD16, 1, 16, 0xffff, 0, FALSE, signed, |
752 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 753 | |
411e1bfb | 754 | /* Like GOT_TLSLD16, but no overflow. */ |
46807bf4 AM |
755 | HOW (R_PPC64_GOT_TLSLD16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
756 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 757 | |
411e1bfb | 758 | /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ |
46807bf4 AM |
759 | HOW (R_PPC64_GOT_TLSLD16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
760 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 761 | |
411e1bfb | 762 | /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ |
46807bf4 AM |
763 | HOW (R_PPC64_GOT_TLSLD16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
764 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 765 | |
411e1bfb AM |
766 | /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes |
767 | the offset to the entry relative to the TOC base (r2). */ | |
46807bf4 AM |
768 | HOW (R_PPC64_GOT_DTPREL16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
769 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 770 | |
411e1bfb | 771 | /* Like GOT_DTPREL16_DS, but no overflow. */ |
46807bf4 AM |
772 | HOW (R_PPC64_GOT_DTPREL16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
773 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 774 | |
411e1bfb | 775 | /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */ |
46807bf4 AM |
776 | HOW (R_PPC64_GOT_DTPREL16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
777 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 778 | |
411e1bfb | 779 | /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ |
46807bf4 AM |
780 | HOW (R_PPC64_GOT_DTPREL16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
781 | ppc64_elf_unhandled_reloc), | |
411e1bfb AM |
782 | |
783 | /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the | |
784 | offset to the entry relative to the TOC base (r2). */ | |
46807bf4 AM |
785 | HOW (R_PPC64_GOT_TPREL16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
786 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 787 | |
411e1bfb | 788 | /* Like GOT_TPREL16_DS, but no overflow. */ |
46807bf4 AM |
789 | HOW (R_PPC64_GOT_TPREL16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
790 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 791 | |
411e1bfb | 792 | /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */ |
46807bf4 AM |
793 | HOW (R_PPC64_GOT_TPREL16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
794 | ppc64_elf_unhandled_reloc), | |
5bd4f169 | 795 | |
411e1bfb | 796 | /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ |
46807bf4 AM |
797 | HOW (R_PPC64_GOT_TPREL16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
798 | ppc64_elf_unhandled_reloc), | |
799 | ||
800 | HOW (R_PPC64_JMP_IREL, 0, 0, 0, 0, FALSE, dont, | |
801 | ppc64_elf_unhandled_reloc), | |
802 | ||
803 | HOW (R_PPC64_IRELATIVE, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, | |
804 | bfd_elf_generic_reloc), | |
e054468f | 805 | |
25f23106 | 806 | /* A 16 bit relative relocation. */ |
46807bf4 AM |
807 | HOW (R_PPC64_REL16, 1, 16, 0xffff, 0, TRUE, signed, |
808 | bfd_elf_generic_reloc), | |
25f23106 AM |
809 | |
810 | /* A 16 bit relative relocation without overflow. */ | |
46807bf4 AM |
811 | HOW (R_PPC64_REL16_LO, 1, 16, 0xffff, 0, TRUE, dont, |
812 | bfd_elf_generic_reloc), | |
25f23106 AM |
813 | |
814 | /* The high order 16 bits of a relative address. */ | |
46807bf4 AM |
815 | HOW (R_PPC64_REL16_HI, 1, 16, 0xffff, 16, TRUE, signed, |
816 | bfd_elf_generic_reloc), | |
25f23106 AM |
817 | |
818 | /* The high order 16 bits of a relative address, plus 1 if the contents of | |
819 | the low 16 bits, treated as a signed number, is negative. */ | |
46807bf4 AM |
820 | HOW (R_PPC64_REL16_HA, 1, 16, 0xffff, 16, TRUE, signed, |
821 | ppc64_elf_ha_reloc), | |
25f23106 | 822 | |
4a969973 AM |
823 | HOW (R_PPC64_REL16_HIGH, 1, 16, 0xffff, 16, TRUE, dont, |
824 | bfd_elf_generic_reloc), | |
825 | ||
826 | HOW (R_PPC64_REL16_HIGHA, 1, 16, 0xffff, 16, TRUE, dont, | |
827 | ppc64_elf_ha_reloc), | |
828 | ||
829 | HOW (R_PPC64_REL16_HIGHER, 1, 16, 0xffff, 32, TRUE, dont, | |
830 | bfd_elf_generic_reloc), | |
831 | ||
832 | HOW (R_PPC64_REL16_HIGHERA, 1, 16, 0xffff, 32, TRUE, dont, | |
833 | ppc64_elf_ha_reloc), | |
834 | ||
835 | HOW (R_PPC64_REL16_HIGHEST, 1, 16, 0xffff, 48, TRUE, dont, | |
836 | bfd_elf_generic_reloc), | |
837 | ||
838 | HOW (R_PPC64_REL16_HIGHESTA, 1, 16, 0xffff, 48, TRUE, dont, | |
839 | ppc64_elf_ha_reloc), | |
840 | ||
a680de9a | 841 | /* Like R_PPC64_REL16_HA but for split field in addpcis. */ |
46807bf4 AM |
842 | HOW (R_PPC64_REL16DX_HA, 2, 16, 0x1fffc1, 16, TRUE, signed, |
843 | ppc64_elf_ha_reloc), | |
a680de9a | 844 | |
7ba71655 | 845 | /* A split-field reloc for addpcis, non-relative (gas internal use only). */ |
46807bf4 AM |
846 | HOW (R_PPC64_16DX_HA, 2, 16, 0x1fffc1, 16, FALSE, signed, |
847 | ppc64_elf_ha_reloc), | |
7ba71655 | 848 | |
f9c6b907 | 849 | /* Like R_PPC64_ADDR16_HI, but no overflow. */ |
46807bf4 AM |
850 | HOW (R_PPC64_ADDR16_HIGH, 1, 16, 0xffff, 16, FALSE, dont, |
851 | bfd_elf_generic_reloc), | |
f9c6b907 AM |
852 | |
853 | /* Like R_PPC64_ADDR16_HA, but no overflow. */ | |
46807bf4 AM |
854 | HOW (R_PPC64_ADDR16_HIGHA, 1, 16, 0xffff, 16, FALSE, dont, |
855 | ppc64_elf_ha_reloc), | |
f9c6b907 AM |
856 | |
857 | /* Like R_PPC64_DTPREL16_HI, but no overflow. */ | |
46807bf4 AM |
858 | HOW (R_PPC64_DTPREL16_HIGH, 1, 16, 0xffff, 16, FALSE, dont, |
859 | ppc64_elf_unhandled_reloc), | |
f9c6b907 AM |
860 | |
861 | /* Like R_PPC64_DTPREL16_HA, but no overflow. */ | |
46807bf4 AM |
862 | HOW (R_PPC64_DTPREL16_HIGHA, 1, 16, 0xffff, 16, FALSE, dont, |
863 | ppc64_elf_unhandled_reloc), | |
f9c6b907 AM |
864 | |
865 | /* Like R_PPC64_TPREL16_HI, but no overflow. */ | |
46807bf4 AM |
866 | HOW (R_PPC64_TPREL16_HIGH, 1, 16, 0xffff, 16, FALSE, dont, |
867 | ppc64_elf_unhandled_reloc), | |
f9c6b907 AM |
868 | |
869 | /* Like R_PPC64_TPREL16_HA, but no overflow. */ | |
46807bf4 AM |
870 | HOW (R_PPC64_TPREL16_HIGHA, 1, 16, 0xffff, 16, FALSE, dont, |
871 | ppc64_elf_unhandled_reloc), | |
f9c6b907 | 872 | |
006589cf | 873 | /* Marker reloc on ELFv2 large-model function entry. */ |
46807bf4 AM |
874 | HOW (R_PPC64_ENTRY, 2, 32, 0, 0, FALSE, dont, |
875 | bfd_elf_generic_reloc), | |
006589cf | 876 | |
45965137 | 877 | /* Like ADDR64, but use local entry point of function. */ |
46807bf4 AM |
878 | HOW (R_PPC64_ADDR64_LOCAL, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
879 | bfd_elf_generic_reloc), | |
45965137 | 880 | |
5bd4f169 | 881 | /* GNU extension to record C++ vtable hierarchy. */ |
46807bf4 AM |
882 | HOW (R_PPC64_GNU_VTINHERIT, 0, 0, 0, 0, FALSE, dont, |
883 | NULL), | |
5bd4f169 AM |
884 | |
885 | /* GNU extension to record C++ vtable member usage. */ | |
46807bf4 AM |
886 | HOW (R_PPC64_GNU_VTENTRY, 0, 0, 0, 0, FALSE, dont, |
887 | NULL), | |
5bd4f169 AM |
888 | }; |
889 | ||
890 | \f | |
891 | /* Initialize the ppc64_elf_howto_table, so that linear accesses can | |
892 | be done. */ | |
893 | ||
894 | static void | |
4ce794b7 | 895 | ppc_howto_init (void) |
5bd4f169 AM |
896 | { |
897 | unsigned int i, type; | |
898 | ||
a4b6fadd | 899 | for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++) |
5bd4f169 AM |
900 | { |
901 | type = ppc64_elf_howto_raw[i].type; | |
a4b6fadd | 902 | BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table)); |
5bd4f169 AM |
903 | ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i]; |
904 | } | |
905 | } | |
906 | ||
907 | static reloc_howto_type * | |
f3185997 | 908 | ppc64_elf_reloc_type_lookup (bfd *abfd, |
4ce794b7 | 909 | bfd_reloc_code_real_type code) |
5bd4f169 | 910 | { |
411e1bfb | 911 | enum elf_ppc64_reloc_type r = R_PPC64_NONE; |
5bd4f169 AM |
912 | |
913 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) | |
914 | /* Initialize howto table if needed. */ | |
915 | ppc_howto_init (); | |
916 | ||
4ce794b7 | 917 | switch (code) |
5bd4f169 AM |
918 | { |
919 | default: | |
f3185997 | 920 | /* xgettext:c-format */ |
2cdcc330 AM |
921 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, |
922 | (int) code); | |
f3185997 | 923 | bfd_set_error (bfd_error_bad_value); |
4ce794b7 | 924 | return NULL; |
5bd4f169 | 925 | |
411e1bfb AM |
926 | case BFD_RELOC_NONE: r = R_PPC64_NONE; |
927 | break; | |
928 | case BFD_RELOC_32: r = R_PPC64_ADDR32; | |
929 | break; | |
930 | case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24; | |
931 | break; | |
932 | case BFD_RELOC_16: r = R_PPC64_ADDR16; | |
933 | break; | |
934 | case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO; | |
935 | break; | |
936 | case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI; | |
937 | break; | |
f9c6b907 AM |
938 | case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH; |
939 | break; | |
411e1bfb | 940 | case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA; |
5bd4f169 | 941 | break; |
f9c6b907 AM |
942 | case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA; |
943 | break; | |
411e1bfb | 944 | case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14; |
5bd4f169 | 945 | break; |
411e1bfb | 946 | case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN; |
5bd4f169 | 947 | break; |
411e1bfb | 948 | case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN; |
5bd4f169 | 949 | break; |
411e1bfb | 950 | case BFD_RELOC_PPC_B26: r = R_PPC64_REL24; |
5bd4f169 | 951 | break; |
05d0e962 AM |
952 | case BFD_RELOC_PPC64_REL24_NOTOC: r = R_PPC64_REL24_NOTOC; |
953 | break; | |
411e1bfb | 954 | case BFD_RELOC_PPC_B16: r = R_PPC64_REL14; |
5bd4f169 | 955 | break; |
411e1bfb | 956 | case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN; |
5bd4f169 | 957 | break; |
411e1bfb | 958 | case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN; |
5bd4f169 | 959 | break; |
411e1bfb | 960 | case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16; |
5bd4f169 | 961 | break; |
411e1bfb | 962 | case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO; |
5bd4f169 | 963 | break; |
411e1bfb | 964 | case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI; |
5bd4f169 | 965 | break; |
411e1bfb | 966 | case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA; |
5bd4f169 | 967 | break; |
411e1bfb | 968 | case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY; |
5bd4f169 | 969 | break; |
411e1bfb | 970 | case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT; |
5bd4f169 | 971 | break; |
411e1bfb | 972 | case BFD_RELOC_32_PCREL: r = R_PPC64_REL32; |
5bd4f169 | 973 | break; |
411e1bfb | 974 | case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32; |
5bd4f169 | 975 | break; |
411e1bfb | 976 | case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32; |
5bd4f169 | 977 | break; |
411e1bfb | 978 | case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO; |
5bd4f169 | 979 | break; |
411e1bfb | 980 | case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI; |
5bd4f169 | 981 | break; |
411e1bfb | 982 | case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA; |
5bd4f169 | 983 | break; |
411e1bfb | 984 | case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF; |
5bd4f169 | 985 | break; |
411e1bfb | 986 | case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO; |
5bd4f169 | 987 | break; |
411e1bfb | 988 | case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI; |
5bd4f169 | 989 | break; |
411e1bfb | 990 | case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA; |
5bd4f169 | 991 | break; |
411e1bfb | 992 | case BFD_RELOC_CTOR: r = R_PPC64_ADDR64; |
5bd4f169 | 993 | break; |
411e1bfb | 994 | case BFD_RELOC_64: r = R_PPC64_ADDR64; |
5bd4f169 | 995 | break; |
411e1bfb | 996 | case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER; |
5bd4f169 | 997 | break; |
411e1bfb | 998 | case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA; |
5bd4f169 | 999 | break; |
411e1bfb | 1000 | case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST; |
5bd4f169 | 1001 | break; |
411e1bfb | 1002 | case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA; |
5bd4f169 | 1003 | break; |
411e1bfb | 1004 | case BFD_RELOC_64_PCREL: r = R_PPC64_REL64; |
5bd4f169 | 1005 | break; |
411e1bfb | 1006 | case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64; |
5bd4f169 | 1007 | break; |
411e1bfb | 1008 | case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64; |
5bd4f169 | 1009 | break; |
411e1bfb | 1010 | case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16; |
5bd4f169 | 1011 | break; |
411e1bfb | 1012 | case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO; |
5bd4f169 | 1013 | break; |
411e1bfb | 1014 | case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI; |
5bd4f169 | 1015 | break; |
411e1bfb | 1016 | case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA; |
5bd4f169 | 1017 | break; |
411e1bfb | 1018 | case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC; |
5bd4f169 | 1019 | break; |
411e1bfb | 1020 | case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16; |
5bd4f169 | 1021 | break; |
411e1bfb | 1022 | case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO; |
5bd4f169 | 1023 | break; |
411e1bfb | 1024 | case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI; |
5bd4f169 | 1025 | break; |
411e1bfb | 1026 | case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA; |
5bd4f169 | 1027 | break; |
411e1bfb | 1028 | case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS; |
5bd4f169 | 1029 | break; |
411e1bfb | 1030 | case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS; |
5bd4f169 | 1031 | break; |
411e1bfb | 1032 | case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS; |
5bd4f169 | 1033 | break; |
411e1bfb | 1034 | case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS; |
5bd4f169 | 1035 | break; |
411e1bfb | 1036 | case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS; |
5bd4f169 | 1037 | break; |
411e1bfb | 1038 | case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS; |
5bd4f169 | 1039 | break; |
411e1bfb | 1040 | case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS; |
5bd4f169 | 1041 | break; |
411e1bfb | 1042 | case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS; |
5bd4f169 | 1043 | break; |
411e1bfb | 1044 | case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS; |
5bd4f169 | 1045 | break; |
411e1bfb | 1046 | case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS; |
5bd4f169 | 1047 | break; |
411e1bfb | 1048 | case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS; |
5bd4f169 | 1049 | break; |
411e1bfb | 1050 | case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS; |
5bd4f169 | 1051 | break; |
727fc41e AM |
1052 | case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD; |
1053 | break; | |
1054 | case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD; | |
1055 | break; | |
411e1bfb | 1056 | case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64; |
5bd4f169 | 1057 | break; |
411e1bfb | 1058 | case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16; |
5bd4f169 | 1059 | break; |
411e1bfb | 1060 | case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO; |
5bd4f169 | 1061 | break; |
411e1bfb | 1062 | case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI; |
5bd4f169 | 1063 | break; |
f9c6b907 AM |
1064 | case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH; |
1065 | break; | |
411e1bfb | 1066 | case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA; |
5bd4f169 | 1067 | break; |
f9c6b907 AM |
1068 | case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA; |
1069 | break; | |
411e1bfb | 1070 | case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64; |
5bd4f169 | 1071 | break; |
411e1bfb AM |
1072 | case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16; |
1073 | break; | |
1074 | case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO; | |
1075 | break; | |
1076 | case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI; | |
1077 | break; | |
f9c6b907 AM |
1078 | case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH; |
1079 | break; | |
411e1bfb AM |
1080 | case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA; |
1081 | break; | |
f9c6b907 AM |
1082 | case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA; |
1083 | break; | |
411e1bfb AM |
1084 | case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64; |
1085 | break; | |
1086 | case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16; | |
1087 | break; | |
1088 | case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO; | |
1089 | break; | |
1090 | case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI; | |
1091 | break; | |
1092 | case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA; | |
1093 | break; | |
1094 | case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16; | |
1095 | break; | |
1096 | case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO; | |
1097 | break; | |
1098 | case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI; | |
1099 | break; | |
1100 | case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA; | |
1101 | break; | |
1102 | case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS; | |
1103 | break; | |
1104 | case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS; | |
1105 | break; | |
1106 | case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI; | |
1107 | break; | |
1108 | case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA; | |
1109 | break; | |
1110 | case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS; | |
1111 | break; | |
1112 | case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS; | |
1113 | break; | |
1114 | case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI; | |
1115 | break; | |
1116 | case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA; | |
1117 | break; | |
1118 | case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS; | |
1119 | break; | |
1120 | case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS; | |
1121 | break; | |
1122 | case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER; | |
1123 | break; | |
1124 | case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA; | |
1125 | break; | |
1126 | case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST; | |
1127 | break; | |
1128 | case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA; | |
1129 | break; | |
1130 | case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS; | |
1131 | break; | |
1132 | case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS; | |
1133 | break; | |
1134 | case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER; | |
1135 | break; | |
1136 | case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA; | |
1137 | break; | |
1138 | case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST; | |
1139 | break; | |
1140 | case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA; | |
1141 | break; | |
25f23106 AM |
1142 | case BFD_RELOC_16_PCREL: r = R_PPC64_REL16; |
1143 | break; | |
1144 | case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO; | |
1145 | break; | |
1146 | case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI; | |
1147 | break; | |
1148 | case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA; | |
1149 | break; | |
4a969973 AM |
1150 | case BFD_RELOC_PPC64_REL16_HIGH: r = R_PPC64_REL16_HIGH; |
1151 | break; | |
1152 | case BFD_RELOC_PPC64_REL16_HIGHA: r = R_PPC64_REL16_HIGHA; | |
1153 | break; | |
1154 | case BFD_RELOC_PPC64_REL16_HIGHER: r = R_PPC64_REL16_HIGHER; | |
1155 | break; | |
1156 | case BFD_RELOC_PPC64_REL16_HIGHERA: r = R_PPC64_REL16_HIGHERA; | |
1157 | break; | |
1158 | case BFD_RELOC_PPC64_REL16_HIGHEST: r = R_PPC64_REL16_HIGHEST; | |
1159 | break; | |
1160 | case BFD_RELOC_PPC64_REL16_HIGHESTA: r = R_PPC64_REL16_HIGHESTA; | |
1161 | break; | |
7ba71655 AM |
1162 | case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA; |
1163 | break; | |
a680de9a PB |
1164 | case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA; |
1165 | break; | |
006589cf AM |
1166 | case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY; |
1167 | break; | |
45965137 AM |
1168 | case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL; |
1169 | break; | |
411e1bfb AM |
1170 | case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT; |
1171 | break; | |
1172 | case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY; | |
5bd4f169 AM |
1173 | break; |
1174 | } | |
1175 | ||
4ce794b7 | 1176 | return ppc64_elf_howto_table[r]; |
5bd4f169 AM |
1177 | }; |
1178 | ||
157090f7 AM |
1179 | static reloc_howto_type * |
1180 | ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
1181 | const char *r_name) | |
1182 | { | |
1183 | unsigned int i; | |
1184 | ||
a4b6fadd | 1185 | for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++) |
157090f7 AM |
1186 | if (ppc64_elf_howto_raw[i].name != NULL |
1187 | && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0) | |
1188 | return &ppc64_elf_howto_raw[i]; | |
1189 | ||
1190 | return NULL; | |
1191 | } | |
1192 | ||
5bd4f169 AM |
1193 | /* Set the howto pointer for a PowerPC ELF reloc. */ |
1194 | ||
f3185997 | 1195 | static bfd_boolean |
4aef7643 | 1196 | ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr, |
4ce794b7 | 1197 | Elf_Internal_Rela *dst) |
5bd4f169 | 1198 | { |
65f38f15 AM |
1199 | unsigned int type; |
1200 | ||
ef60b7ff | 1201 | /* Initialize howto table if needed. */ |
5bd4f169 | 1202 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
5bd4f169 AM |
1203 | ppc_howto_init (); |
1204 | ||
65f38f15 | 1205 | type = ELF64_R_TYPE (dst->r_info); |
a4b6fadd | 1206 | if (type >= ARRAY_SIZE (ppc64_elf_howto_table)) |
d0fb9a8d | 1207 | { |
695344c0 | 1208 | /* xgettext:c-format */ |
0aa13fee | 1209 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
cf97bcb0 | 1210 | abfd, type); |
f3185997 NC |
1211 | bfd_set_error (bfd_error_bad_value); |
1212 | return FALSE; | |
d0fb9a8d | 1213 | } |
65f38f15 | 1214 | cache_ptr->howto = ppc64_elf_howto_table[type]; |
f3185997 NC |
1215 | if (cache_ptr->howto == NULL || cache_ptr->howto->name == NULL) |
1216 | { | |
1217 | /* xgettext:c-format */ | |
1218 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), | |
1219 | abfd, type); | |
1220 | bfd_set_error (bfd_error_bad_value); | |
1221 | return FALSE; | |
1222 | } | |
2cdcc330 | 1223 | |
f3185997 | 1224 | return TRUE; |
5bd4f169 AM |
1225 | } |
1226 | ||
04c9666a | 1227 | /* Handle the R_PPC64_ADDR16_HA and similar relocs. */ |
5bd4f169 AM |
1228 | |
1229 | static bfd_reloc_status_type | |
4ce794b7 AM |
1230 | ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1231 | void *data, asection *input_section, | |
1232 | bfd *output_bfd, char **error_message) | |
5bd4f169 | 1233 | { |
a680de9a PB |
1234 | enum elf_ppc64_reloc_type r_type; |
1235 | long insn; | |
1236 | bfd_size_type octets; | |
3de43e7b | 1237 | bfd_vma value; |
a680de9a | 1238 | |
805fc799 AM |
1239 | /* If this is a relocatable link (output_bfd test tells us), just |
1240 | call the generic function. Any adjustment will be done at final | |
1241 | link time. */ | |
1242 | if (output_bfd != NULL) | |
cedb70c5 | 1243 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
805fc799 AM |
1244 | input_section, output_bfd, error_message); |
1245 | ||
1246 | /* Adjust the addend for sign extension of the low 16 bits. | |
1247 | We won't actually be using the low 16 bits, so trashing them | |
1248 | doesn't matter. */ | |
1249 | reloc_entry->addend += 0x8000; | |
a680de9a PB |
1250 | r_type = reloc_entry->howto->type; |
1251 | if (r_type != R_PPC64_REL16DX_HA) | |
1252 | return bfd_reloc_continue; | |
1253 | ||
1254 | value = 0; | |
1255 | if (!bfd_is_com_section (symbol->section)) | |
1256 | value = symbol->value; | |
1257 | value += (reloc_entry->addend | |
1258 | + symbol->section->output_offset | |
1259 | + symbol->section->output_section->vma); | |
1260 | value -= (reloc_entry->address | |
1261 | + input_section->output_offset | |
1262 | + input_section->output_section->vma); | |
3de43e7b | 1263 | value = (bfd_signed_vma) value >> 16; |
a680de9a PB |
1264 | |
1265 | octets = reloc_entry->address * bfd_octets_per_byte (abfd); | |
1266 | insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); | |
1267 | insn &= ~0x1fffc1; | |
3de43e7b | 1268 | insn |= (value & 0xffc1) | ((value & 0x3e) << 15); |
a680de9a | 1269 | bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); |
3de43e7b | 1270 | if (value + 0x8000 > 0xffff) |
a680de9a PB |
1271 | return bfd_reloc_overflow; |
1272 | return bfd_reloc_ok; | |
805fc799 | 1273 | } |
5bd4f169 | 1274 | |
2441e016 AM |
1275 | static bfd_reloc_status_type |
1276 | ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1277 | void *data, asection *input_section, | |
1278 | bfd *output_bfd, char **error_message) | |
1279 | { | |
1280 | if (output_bfd != NULL) | |
1281 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1282 | input_section, output_bfd, error_message); | |
1283 | ||
699733f6 AM |
1284 | if (strcmp (symbol->section->name, ".opd") == 0 |
1285 | && (symbol->section->owner->flags & DYNAMIC) == 0) | |
2441e016 AM |
1286 | { |
1287 | bfd_vma dest = opd_entry_value (symbol->section, | |
1288 | symbol->value + reloc_entry->addend, | |
aef36ac1 | 1289 | NULL, NULL, FALSE); |
2441e016 AM |
1290 | if (dest != (bfd_vma) -1) |
1291 | reloc_entry->addend = dest - (symbol->value | |
1292 | + symbol->section->output_section->vma | |
1293 | + symbol->section->output_offset); | |
1294 | } | |
810d4e75 AM |
1295 | else |
1296 | { | |
1297 | elf_symbol_type *elfsym = (elf_symbol_type *) symbol; | |
1298 | ||
1299 | if (symbol->section->owner != abfd | |
9f284bf9 | 1300 | && symbol->section->owner != NULL |
810d4e75 AM |
1301 | && abiversion (symbol->section->owner) >= 2) |
1302 | { | |
1303 | unsigned int i; | |
1304 | ||
1305 | for (i = 0; i < symbol->section->owner->symcount; ++i) | |
1306 | { | |
1307 | asymbol *symdef = symbol->section->owner->outsymbols[i]; | |
1308 | ||
1309 | if (strcmp (symdef->name, symbol->name) == 0) | |
1310 | { | |
1311 | elfsym = (elf_symbol_type *) symdef; | |
1312 | break; | |
1313 | } | |
1314 | } | |
1315 | } | |
1316 | reloc_entry->addend | |
1317 | += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other); | |
1318 | } | |
2441e016 AM |
1319 | return bfd_reloc_continue; |
1320 | } | |
1321 | ||
805fc799 | 1322 | static bfd_reloc_status_type |
4ce794b7 AM |
1323 | ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1324 | void *data, asection *input_section, | |
1325 | bfd *output_bfd, char **error_message) | |
805fc799 AM |
1326 | { |
1327 | long insn; | |
04c9666a | 1328 | enum elf_ppc64_reloc_type r_type; |
805fc799 | 1329 | bfd_size_type octets; |
794e51c0 AM |
1330 | /* Assume 'at' branch hints. */ |
1331 | bfd_boolean is_isa_v2 = TRUE; | |
805fc799 AM |
1332 | |
1333 | /* If this is a relocatable link (output_bfd test tells us), just | |
1334 | call the generic function. Any adjustment will be done at final | |
1335 | link time. */ | |
5bd4f169 | 1336 | if (output_bfd != NULL) |
cedb70c5 | 1337 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
805fc799 AM |
1338 | input_section, output_bfd, error_message); |
1339 | ||
1340 | octets = reloc_entry->address * bfd_octets_per_byte (abfd); | |
1341 | insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); | |
1342 | insn &= ~(0x01 << 21); | |
4ce794b7 | 1343 | r_type = reloc_entry->howto->type; |
805fc799 AM |
1344 | if (r_type == R_PPC64_ADDR14_BRTAKEN |
1345 | || r_type == R_PPC64_REL14_BRTAKEN) | |
cedb70c5 | 1346 | insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ |
805fc799 | 1347 | |
794e51c0 | 1348 | if (is_isa_v2) |
5bd4f169 | 1349 | { |
805fc799 AM |
1350 | /* Set 'a' bit. This is 0b00010 in BO field for branch |
1351 | on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
1352 | for branch on CTR insns (BO == 1a00t or 1a01t). */ | |
1353 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
1354 | insn |= 0x02 << 21; | |
1355 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
1356 | insn |= 0x08 << 21; | |
1357 | else | |
2441e016 | 1358 | goto out; |
5bd4f169 | 1359 | } |
805fc799 AM |
1360 | else |
1361 | { | |
1362 | bfd_vma target = 0; | |
1363 | bfd_vma from; | |
5bd4f169 | 1364 | |
805fc799 AM |
1365 | if (!bfd_is_com_section (symbol->section)) |
1366 | target = symbol->value; | |
1367 | target += symbol->section->output_section->vma; | |
1368 | target += symbol->section->output_offset; | |
1369 | target += reloc_entry->addend; | |
5bd4f169 | 1370 | |
805fc799 AM |
1371 | from = (reloc_entry->address |
1372 | + input_section->output_offset | |
1373 | + input_section->output_section->vma); | |
5bd4f169 | 1374 | |
805fc799 AM |
1375 | /* Invert 'y' bit if not the default. */ |
1376 | if ((bfd_signed_vma) (target - from) < 0) | |
1377 | insn ^= 0x01 << 21; | |
1378 | } | |
4ce794b7 | 1379 | bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); |
2441e016 AM |
1380 | out: |
1381 | return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data, | |
1382 | input_section, output_bfd, error_message); | |
805fc799 | 1383 | } |
5bd4f169 | 1384 | |
805fc799 | 1385 | static bfd_reloc_status_type |
4ce794b7 AM |
1386 | ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1387 | void *data, asection *input_section, | |
1388 | bfd *output_bfd, char **error_message) | |
805fc799 AM |
1389 | { |
1390 | /* If this is a relocatable link (output_bfd test tells us), just | |
1391 | call the generic function. Any adjustment will be done at final | |
1392 | link time. */ | |
1393 | if (output_bfd != NULL) | |
cedb70c5 | 1394 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
805fc799 | 1395 | input_section, output_bfd, error_message); |
5bd4f169 | 1396 | |
805fc799 AM |
1397 | /* Subtract the symbol section base address. */ |
1398 | reloc_entry->addend -= symbol->section->output_section->vma; | |
5bd4f169 AM |
1399 | return bfd_reloc_continue; |
1400 | } | |
1401 | ||
805fc799 | 1402 | static bfd_reloc_status_type |
4ce794b7 AM |
1403 | ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1404 | void *data, asection *input_section, | |
1405 | bfd *output_bfd, char **error_message) | |
805fc799 AM |
1406 | { |
1407 | /* If this is a relocatable link (output_bfd test tells us), just | |
1408 | call the generic function. Any adjustment will be done at final | |
1409 | link time. */ | |
1410 | if (output_bfd != NULL) | |
cedb70c5 | 1411 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
805fc799 AM |
1412 | input_section, output_bfd, error_message); |
1413 | ||
1414 | /* Subtract the symbol section base address. */ | |
1415 | reloc_entry->addend -= symbol->section->output_section->vma; | |
1416 | ||
1417 | /* Adjust the addend for sign extension of the low 16 bits. */ | |
1418 | reloc_entry->addend += 0x8000; | |
1419 | return bfd_reloc_continue; | |
1420 | } | |
1421 | ||
1422 | static bfd_reloc_status_type | |
4ce794b7 AM |
1423 | ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1424 | void *data, asection *input_section, | |
1425 | bfd *output_bfd, char **error_message) | |
805fc799 AM |
1426 | { |
1427 | bfd_vma TOCstart; | |
1428 | ||
1429 | /* If this is a relocatable link (output_bfd test tells us), just | |
1430 | call the generic function. Any adjustment will be done at final | |
1431 | link time. */ | |
1432 | if (output_bfd != NULL) | |
cedb70c5 | 1433 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
805fc799 AM |
1434 | input_section, output_bfd, error_message); |
1435 | ||
1436 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); | |
1437 | if (TOCstart == 0) | |
1c865ab2 | 1438 | TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); |
805fc799 AM |
1439 | |
1440 | /* Subtract the TOC base address. */ | |
1441 | reloc_entry->addend -= TOCstart + TOC_BASE_OFF; | |
1442 | return bfd_reloc_continue; | |
1443 | } | |
1444 | ||
1445 | static bfd_reloc_status_type | |
4ce794b7 AM |
1446 | ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1447 | void *data, asection *input_section, | |
1448 | bfd *output_bfd, char **error_message) | |
805fc799 AM |
1449 | { |
1450 | bfd_vma TOCstart; | |
1451 | ||
1452 | /* If this is a relocatable link (output_bfd test tells us), just | |
1453 | call the generic function. Any adjustment will be done at final | |
1454 | link time. */ | |
1455 | if (output_bfd != NULL) | |
cedb70c5 | 1456 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
805fc799 AM |
1457 | input_section, output_bfd, error_message); |
1458 | ||
1459 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); | |
1460 | if (TOCstart == 0) | |
1c865ab2 | 1461 | TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); |
805fc799 AM |
1462 | |
1463 | /* Subtract the TOC base address. */ | |
1464 | reloc_entry->addend -= TOCstart + TOC_BASE_OFF; | |
1465 | ||
1466 | /* Adjust the addend for sign extension of the low 16 bits. */ | |
1467 | reloc_entry->addend += 0x8000; | |
1468 | return bfd_reloc_continue; | |
1469 | } | |
1470 | ||
1471 | static bfd_reloc_status_type | |
4ce794b7 AM |
1472 | ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1473 | void *data, asection *input_section, | |
1474 | bfd *output_bfd, char **error_message) | |
805fc799 AM |
1475 | { |
1476 | bfd_vma TOCstart; | |
1477 | bfd_size_type octets; | |
1478 | ||
1479 | /* If this is a relocatable link (output_bfd test tells us), just | |
1480 | call the generic function. Any adjustment will be done at final | |
1481 | link time. */ | |
1482 | if (output_bfd != NULL) | |
cedb70c5 | 1483 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
805fc799 AM |
1484 | input_section, output_bfd, error_message); |
1485 | ||
1486 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); | |
1487 | if (TOCstart == 0) | |
1c865ab2 | 1488 | TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); |
805fc799 AM |
1489 | |
1490 | octets = reloc_entry->address * bfd_octets_per_byte (abfd); | |
1491 | bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets); | |
1492 | return bfd_reloc_ok; | |
1493 | } | |
1494 | ||
1495 | static bfd_reloc_status_type | |
4ce794b7 AM |
1496 | ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1497 | void *data, asection *input_section, | |
1498 | bfd *output_bfd, char **error_message) | |
805fc799 AM |
1499 | { |
1500 | /* If this is a relocatable link (output_bfd test tells us), just | |
1501 | call the generic function. Any adjustment will be done at final | |
1502 | link time. */ | |
1503 | if (output_bfd != NULL) | |
cedb70c5 | 1504 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
805fc799 AM |
1505 | input_section, output_bfd, error_message); |
1506 | ||
1507 | if (error_message != NULL) | |
1508 | { | |
1509 | static char buf[60]; | |
1510 | sprintf (buf, "generic linker can't handle %s", | |
1511 | reloc_entry->howto->name); | |
1512 | *error_message = buf; | |
1513 | } | |
1514 | return bfd_reloc_dangerous; | |
1515 | } | |
1516 | ||
927be08e AM |
1517 | /* Track GOT entries needed for a given symbol. We might need more |
1518 | than one got entry per symbol. */ | |
1519 | struct got_entry | |
1520 | { | |
1521 | struct got_entry *next; | |
1522 | ||
1523 | /* The symbol addend that we'll be placing in the GOT. */ | |
1524 | bfd_vma addend; | |
1525 | ||
1526 | /* Unlike other ELF targets, we use separate GOT entries for the same | |
1527 | symbol referenced from different input files. This is to support | |
1528 | automatic multiple TOC/GOT sections, where the TOC base can vary | |
1529 | from one input file to another. After partitioning into TOC groups | |
1530 | we merge entries within the group. | |
1531 | ||
1532 | Point to the BFD owning this GOT entry. */ | |
1533 | bfd *owner; | |
1534 | ||
1535 | /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD, | |
1536 | TLS_TPREL or TLS_DTPREL for tls entries. */ | |
f961d9dd | 1537 | unsigned char tls_type; |
927be08e AM |
1538 | |
1539 | /* Non-zero if got.ent points to real entry. */ | |
f961d9dd | 1540 | unsigned char is_indirect; |
927be08e AM |
1541 | |
1542 | /* Reference count until size_dynamic_sections, GOT offset thereafter. */ | |
1543 | union | |
2cdcc330 AM |
1544 | { |
1545 | bfd_signed_vma refcount; | |
1546 | bfd_vma offset; | |
1547 | struct got_entry *ent; | |
1548 | } got; | |
927be08e AM |
1549 | }; |
1550 | ||
1551 | /* The same for PLT. */ | |
1552 | struct plt_entry | |
1553 | { | |
1554 | struct plt_entry *next; | |
1555 | ||
1556 | bfd_vma addend; | |
1557 | ||
1558 | union | |
2cdcc330 AM |
1559 | { |
1560 | bfd_signed_vma refcount; | |
1561 | bfd_vma offset; | |
1562 | } plt; | |
927be08e AM |
1563 | }; |
1564 | ||
e717da7e AM |
1565 | struct ppc64_elf_obj_tdata |
1566 | { | |
1567 | struct elf_obj_tdata elf; | |
1568 | ||
1569 | /* Shortcuts to dynamic linker sections. */ | |
1570 | asection *got; | |
1571 | asection *relgot; | |
1572 | ||
b3fac117 AM |
1573 | /* Used during garbage collection. We attach global symbols defined |
1574 | on removed .opd entries to this section so that the sym is removed. */ | |
1575 | asection *deleted_section; | |
81688140 | 1576 | |
927be08e | 1577 | /* TLS local dynamic got entry handling. Support for multiple GOT |
e717da7e | 1578 | sections means we potentially need one of these for each input bfd. */ |
927be08e | 1579 | struct got_entry tlsld_got; |
8860955f | 1580 | |
2cdcc330 AM |
1581 | union |
1582 | { | |
729eabd5 AM |
1583 | /* A copy of relocs before they are modified for --emit-relocs. */ |
1584 | Elf_Internal_Rela *relocs; | |
1585 | ||
1586 | /* Section contents. */ | |
1587 | bfd_byte *contents; | |
1588 | } opd; | |
d77c8a4b AM |
1589 | |
1590 | /* Nonzero if this bfd has small toc/got relocs, ie. that expect | |
1591 | the reloc to be in the range -32768 to 32767. */ | |
98528052 AM |
1592 | unsigned int has_small_toc_reloc : 1; |
1593 | ||
560c8763 AM |
1594 | /* Set if toc/got ha relocs detected not using r2, or lo reloc |
1595 | instruction not one we handle. */ | |
1596 | unsigned int unexpected_toc_insn : 1; | |
066f4018 AM |
1597 | |
1598 | /* Set if got relocs that can be optimised are present in this file. */ | |
1599 | unsigned int has_gotrel : 1; | |
e717da7e AM |
1600 | }; |
1601 | ||
1602 | #define ppc64_elf_tdata(bfd) \ | |
1603 | ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any) | |
1604 | ||
1605 | #define ppc64_tlsld_got(bfd) \ | |
1606 | (&ppc64_elf_tdata (bfd)->tlsld_got) | |
1607 | ||
0c8d6e5c AM |
1608 | #define is_ppc64_elf(bfd) \ |
1609 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
4dfe6ac6 | 1610 | && elf_object_id (bfd) == PPC64_ELF_DATA) |
0c8d6e5c | 1611 | |
e717da7e AM |
1612 | /* Override the generic function because we store some extras. */ |
1613 | ||
1614 | static bfd_boolean | |
1615 | ppc64_elf_mkobject (bfd *abfd) | |
1616 | { | |
0ffa91dd | 1617 | return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata), |
4dfe6ac6 | 1618 | PPC64_ELF_DATA); |
e717da7e AM |
1619 | } |
1620 | ||
feee612b | 1621 | /* Fix bad default arch selected for a 64 bit input bfd when the |
14b57c7c | 1622 | default is 32 bit. Also select arch based on apuinfo. */ |
feee612b | 1623 | |
b34976b6 | 1624 | static bfd_boolean |
4ce794b7 | 1625 | ppc64_elf_object_p (bfd *abfd) |
feee612b | 1626 | { |
14b57c7c AM |
1627 | if (!abfd->arch_info->the_default) |
1628 | return TRUE; | |
1629 | ||
1630 | if (abfd->arch_info->bits_per_word == 32) | |
feee612b AM |
1631 | { |
1632 | Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); | |
1633 | ||
1634 | if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64) | |
1635 | { | |
1636 | /* Relies on arch after 32 bit default being 64 bit default. */ | |
1637 | abfd->arch_info = abfd->arch_info->next; | |
1638 | BFD_ASSERT (abfd->arch_info->bits_per_word == 64); | |
1639 | } | |
1640 | } | |
14b57c7c | 1641 | return _bfd_elf_ppc_set_arch (abfd); |
feee612b AM |
1642 | } |
1643 | ||
d37c89e5 AM |
1644 | /* Support for core dump NOTE sections. */ |
1645 | ||
1646 | static bfd_boolean | |
1647 | ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) | |
1648 | { | |
eea6121a | 1649 | size_t offset, size; |
d37c89e5 AM |
1650 | |
1651 | if (note->descsz != 504) | |
1652 | return FALSE; | |
1653 | ||
1654 | /* pr_cursig */ | |
228e534f | 1655 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
d37c89e5 AM |
1656 | |
1657 | /* pr_pid */ | |
228e534f | 1658 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32); |
d37c89e5 AM |
1659 | |
1660 | /* pr_reg */ | |
1661 | offset = 112; | |
eea6121a | 1662 | size = 384; |
d37c89e5 AM |
1663 | |
1664 | /* Make a ".reg/999" section. */ | |
1665 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 1666 | size, note->descpos + offset); |
d37c89e5 AM |
1667 | } |
1668 | ||
1669 | static bfd_boolean | |
1670 | ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) | |
1671 | { | |
1672 | if (note->descsz != 136) | |
1673 | return FALSE; | |
1674 | ||
228e534f | 1675 | elf_tdata (abfd)->core->pid |
bc989cdc | 1676 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 1677 | elf_tdata (abfd)->core->program |
d37c89e5 | 1678 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 1679 | elf_tdata (abfd)->core->command |
d37c89e5 AM |
1680 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
1681 | ||
1682 | return TRUE; | |
1683 | } | |
1684 | ||
183e98be AM |
1685 | static char * |
1686 | ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, | |
1687 | ...) | |
1688 | { | |
1689 | switch (note_type) | |
1690 | { | |
1691 | default: | |
1692 | return NULL; | |
1693 | ||
1694 | case NT_PRPSINFO: | |
1695 | { | |
9ef6d1e3 | 1696 | char data[136] ATTRIBUTE_NONSTRING; |
183e98be AM |
1697 | va_list ap; |
1698 | ||
1699 | va_start (ap, note_type); | |
75cd47ed | 1700 | memset (data, 0, sizeof (data)); |
183e98be | 1701 | strncpy (data + 40, va_arg (ap, const char *), 16); |
be3e27bb | 1702 | #if GCC_VERSION == 8000 || GCC_VERSION == 8001 |
95da9854 | 1703 | DIAGNOSTIC_PUSH; |
be3e27bb | 1704 | /* GCC 8.0 and 8.1 warn about 80 equals destination size with |
95da9854 L |
1705 | -Wstringop-truncation: |
1706 | https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643 | |
1707 | */ | |
95da9854 L |
1708 | DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION; |
1709 | #endif | |
183e98be | 1710 | strncpy (data + 56, va_arg (ap, const char *), 80); |
be3e27bb | 1711 | #if GCC_VERSION == 8000 || GCC_VERSION == 8001 |
95da9854 | 1712 | DIAGNOSTIC_POP; |
fe75810f | 1713 | #endif |
183e98be AM |
1714 | va_end (ap); |
1715 | return elfcore_write_note (abfd, buf, bufsiz, | |
1716 | "CORE", note_type, data, sizeof (data)); | |
1717 | } | |
1718 | ||
1719 | case NT_PRSTATUS: | |
1720 | { | |
1721 | char data[504]; | |
1722 | va_list ap; | |
1723 | long pid; | |
1724 | int cursig; | |
1725 | const void *greg; | |
1726 | ||
1727 | va_start (ap, note_type); | |
1728 | memset (data, 0, 112); | |
1729 | pid = va_arg (ap, long); | |
1730 | bfd_put_32 (abfd, pid, data + 32); | |
1731 | cursig = va_arg (ap, int); | |
1732 | bfd_put_16 (abfd, cursig, data + 12); | |
1733 | greg = va_arg (ap, const void *); | |
1734 | memcpy (data + 112, greg, 384); | |
1735 | memset (data + 496, 0, 8); | |
1736 | va_end (ap); | |
1737 | return elfcore_write_note (abfd, buf, bufsiz, | |
1738 | "CORE", note_type, data, sizeof (data)); | |
1739 | } | |
1740 | } | |
1741 | } | |
1742 | ||
5d35169e AM |
1743 | /* Add extra PPC sections. */ |
1744 | ||
2cdcc330 | 1745 | static const struct bfd_elf_special_section ppc64_elf_special_sections[] = |
7f4d3958 | 1746 | { |
07d6d2b8 AM |
1747 | { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 }, |
1748 | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, | |
0112cd26 | 1749 | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
07d6d2b8 AM |
1750 | { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
1751 | { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
0112cd26 | 1752 | { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
07d6d2b8 | 1753 | { NULL, 0, 0, 0, 0 } |
5d35169e AM |
1754 | }; |
1755 | ||
7c8fe5c4 AM |
1756 | enum _ppc64_sec_type { |
1757 | sec_normal = 0, | |
1758 | sec_opd = 1, | |
1759 | sec_toc = 2 | |
1760 | }; | |
1761 | ||
f0abc2a1 AM |
1762 | struct _ppc64_elf_section_data |
1763 | { | |
1764 | struct bfd_elf_section_data elf; | |
411e1bfb | 1765 | |
f0abc2a1 AM |
1766 | union |
1767 | { | |
51aecdc5 AM |
1768 | /* An array with one entry for each opd function descriptor, |
1769 | and some spares since opd entries may be either 16 or 24 bytes. */ | |
1770 | #define OPD_NDX(OFF) ((OFF) >> 4) | |
74f0fb50 AM |
1771 | struct _opd_sec_data |
1772 | { | |
1773 | /* Points to the function code section for local opd entries. */ | |
1774 | asection **func_sec; | |
1775 | ||
1776 | /* After editing .opd, adjust references to opd local syms. */ | |
1777 | long *adjust; | |
1778 | } opd; | |
7c8fe5c4 | 1779 | |
3a71aa26 AM |
1780 | /* An array for toc sections, indexed by offset/8. */ |
1781 | struct _toc_sec_data | |
1782 | { | |
1783 | /* Specifies the relocation symbol index used at a given toc offset. */ | |
1784 | unsigned *symndx; | |
1785 | ||
1786 | /* And the relocation addend. */ | |
1787 | bfd_vma *add; | |
1788 | } toc; | |
7c8fe5c4 AM |
1789 | } u; |
1790 | ||
1791 | enum _ppc64_sec_type sec_type:2; | |
411e1bfb | 1792 | |
7c8fe5c4 AM |
1793 | /* Flag set when small branches are detected. Used to |
1794 | select suitable defaults for the stub group size. */ | |
1795 | unsigned int has_14bit_branch:1; | |
3e04d765 AM |
1796 | |
1797 | /* Flag set when PLTCALL relocs are detected. */ | |
1798 | unsigned int has_pltcall:1; | |
066f4018 AM |
1799 | |
1800 | /* Flag set when section has GOT relocations that can be optimised. */ | |
1801 | unsigned int has_gotrel:1; | |
f0abc2a1 AM |
1802 | }; |
1803 | ||
1804 | #define ppc64_elf_section_data(sec) \ | |
411e1bfb | 1805 | ((struct _ppc64_elf_section_data *) elf_section_data (sec)) |
f0abc2a1 AM |
1806 | |
1807 | static bfd_boolean | |
4ce794b7 | 1808 | ppc64_elf_new_section_hook (bfd *abfd, asection *sec) |
f0abc2a1 | 1809 | { |
f592407e AM |
1810 | if (!sec->used_by_bfd) |
1811 | { | |
1812 | struct _ppc64_elf_section_data *sdata; | |
1813 | bfd_size_type amt = sizeof (*sdata); | |
f0abc2a1 | 1814 | |
f592407e AM |
1815 | sdata = bfd_zalloc (abfd, amt); |
1816 | if (sdata == NULL) | |
1817 | return FALSE; | |
1818 | sec->used_by_bfd = sdata; | |
1819 | } | |
f0abc2a1 AM |
1820 | |
1821 | return _bfd_elf_new_section_hook (abfd, sec); | |
1822 | } | |
4025353c | 1823 | |
74f0fb50 | 1824 | static struct _opd_sec_data * |
4025353c AM |
1825 | get_opd_info (asection * sec) |
1826 | { | |
1827 | if (sec != NULL | |
1828 | && ppc64_elf_section_data (sec) != NULL | |
7c8fe5c4 | 1829 | && ppc64_elf_section_data (sec)->sec_type == sec_opd) |
74f0fb50 | 1830 | return &ppc64_elf_section_data (sec)->u.opd; |
4025353c AM |
1831 | return NULL; |
1832 | } | |
90e3cdf2 JJ |
1833 | \f |
1834 | /* Parameters for the qsort hook. */ | |
90e3cdf2 | 1835 | static bfd_boolean synthetic_relocatable; |
cd285db5 | 1836 | static asection *synthetic_opd; |
90e3cdf2 | 1837 | |
699733f6 | 1838 | /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */ |
90e3cdf2 JJ |
1839 | |
1840 | static int | |
1841 | compare_symbols (const void *ap, const void *bp) | |
1842 | { | |
2cdcc330 AM |
1843 | const asymbol *a = *(const asymbol **) ap; |
1844 | const asymbol *b = *(const asymbol **) bp; | |
90e3cdf2 | 1845 | |
699733f6 AM |
1846 | /* Section symbols first. */ |
1847 | if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM)) | |
90e3cdf2 | 1848 | return -1; |
699733f6 | 1849 | if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM)) |
90e3cdf2 JJ |
1850 | return 1; |
1851 | ||
699733f6 | 1852 | /* then .opd symbols. */ |
cd285db5 AM |
1853 | if (synthetic_opd != NULL) |
1854 | { | |
1855 | if (strcmp (a->section->name, ".opd") == 0 | |
1856 | && strcmp (b->section->name, ".opd") != 0) | |
1857 | return -1; | |
1858 | if (strcmp (a->section->name, ".opd") != 0 | |
1859 | && strcmp (b->section->name, ".opd") == 0) | |
1860 | return 1; | |
1861 | } | |
90e3cdf2 | 1862 | |
699733f6 | 1863 | /* then other code symbols. */ |
2cdcc330 AM |
1864 | if (((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
1865 | == (SEC_CODE | SEC_ALLOC)) | |
1866 | && ((b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) | |
1867 | != (SEC_CODE | SEC_ALLOC))) | |
90e3cdf2 JJ |
1868 | return -1; |
1869 | ||
2cdcc330 AM |
1870 | if (((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
1871 | != (SEC_CODE | SEC_ALLOC)) | |
1872 | && ((b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) | |
1873 | == (SEC_CODE | SEC_ALLOC))) | |
90e3cdf2 JJ |
1874 | return 1; |
1875 | ||
1876 | if (synthetic_relocatable) | |
1877 | { | |
1878 | if (a->section->id < b->section->id) | |
1879 | return -1; | |
1880 | ||
1881 | if (a->section->id > b->section->id) | |
1882 | return 1; | |
1883 | } | |
1884 | ||
1885 | if (a->value + a->section->vma < b->value + b->section->vma) | |
1886 | return -1; | |
1887 | ||
1888 | if (a->value + a->section->vma > b->value + b->section->vma) | |
1889 | return 1; | |
1890 | ||
4d35a0aa AM |
1891 | /* For syms with the same value, prefer strong dynamic global function |
1892 | syms over other syms. */ | |
1893 | if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0) | |
1894 | return -1; | |
1895 | ||
1896 | if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0) | |
1897 | return 1; | |
1898 | ||
1899 | if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0) | |
1900 | return -1; | |
1901 | ||
1902 | if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0) | |
1903 | return 1; | |
1904 | ||
1905 | if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0) | |
1906 | return -1; | |
1907 | ||
1908 | if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0) | |
1909 | return 1; | |
1910 | ||
1911 | if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0) | |
1912 | return -1; | |
1913 | ||
1914 | if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0) | |
1915 | return 1; | |
1916 | ||
aaed6f5b | 1917 | return a > b; |
90e3cdf2 JJ |
1918 | } |
1919 | ||
699733f6 | 1920 | /* Search SYMS for a symbol of the given VALUE. */ |
90e3cdf2 | 1921 | |
699733f6 | 1922 | static asymbol * |
7292b3ac | 1923 | sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value) |
90e3cdf2 | 1924 | { |
699733f6 | 1925 | long mid; |
90e3cdf2 | 1926 | |
7292b3ac | 1927 | if (id == (unsigned) -1) |
699733f6 AM |
1928 | { |
1929 | while (lo < hi) | |
1930 | { | |
1931 | mid = (lo + hi) >> 1; | |
1932 | if (syms[mid]->value + syms[mid]->section->vma < value) | |
1933 | lo = mid + 1; | |
1934 | else if (syms[mid]->value + syms[mid]->section->vma > value) | |
1935 | hi = mid; | |
1936 | else | |
1937 | return syms[mid]; | |
1938 | } | |
1939 | } | |
1940 | else | |
1941 | { | |
1942 | while (lo < hi) | |
1943 | { | |
1944 | mid = (lo + hi) >> 1; | |
1945 | if (syms[mid]->section->id < id) | |
1946 | lo = mid + 1; | |
1947 | else if (syms[mid]->section->id > id) | |
1948 | hi = mid; | |
1949 | else if (syms[mid]->value < value) | |
1950 | lo = mid + 1; | |
1951 | else if (syms[mid]->value > value) | |
1952 | hi = mid; | |
1953 | else | |
1954 | return syms[mid]; | |
1955 | } | |
1956 | } | |
1957 | return NULL; | |
90e3cdf2 JJ |
1958 | } |
1959 | ||
468392fb AM |
1960 | static bfd_boolean |
1961 | section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) | |
1962 | { | |
1963 | bfd_vma vma = *(bfd_vma *) ptr; | |
1964 | return ((section->flags & SEC_ALLOC) != 0 | |
1965 | && section->vma <= vma | |
1966 | && vma < section->vma + section->size); | |
1967 | } | |
1968 | ||
699733f6 | 1969 | /* Create synthetic symbols, effectively restoring "dot-symbol" function |
c4b0b099 AM |
1970 | entry syms. Also generate @plt symbols for the glink branch table. |
1971 | Returns count of synthetic symbols in RET or -1 on error. */ | |
90e3cdf2 JJ |
1972 | |
1973 | static long | |
a7535cf3 AM |
1974 | ppc64_elf_get_synthetic_symtab (bfd *abfd, |
1975 | long static_count, asymbol **static_syms, | |
1976 | long dyn_count, asymbol **dyn_syms, | |
c9727e01 | 1977 | asymbol **ret) |
90e3cdf2 JJ |
1978 | { |
1979 | asymbol *s; | |
0ccf57bd | 1980 | size_t i, j, count; |
90e3cdf2 | 1981 | char *names; |
0ccf57bd | 1982 | size_t symcount, codesecsym, codesecsymend, secsymend, opdsymend; |
ee67d69a | 1983 | asection *opd = NULL; |
90e3cdf2 | 1984 | bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0; |
a7535cf3 | 1985 | asymbol **syms; |
ee67d69a | 1986 | int abi = abiversion (abfd); |
90e3cdf2 JJ |
1987 | |
1988 | *ret = NULL; | |
1989 | ||
ee67d69a AM |
1990 | if (abi < 2) |
1991 | { | |
1992 | opd = bfd_get_section_by_name (abfd, ".opd"); | |
1993 | if (opd == NULL && abi == 1) | |
1994 | return 0; | |
1995 | } | |
90e3cdf2 | 1996 | |
a5259595 AM |
1997 | syms = NULL; |
1998 | codesecsym = 0; | |
1999 | codesecsymend = 0; | |
2000 | secsymend = 0; | |
2001 | opdsymend = 0; | |
2002 | symcount = 0; | |
2003 | if (opd != NULL) | |
c9727e01 | 2004 | { |
a5259595 AM |
2005 | symcount = static_count; |
2006 | if (!relocatable) | |
2007 | symcount += dyn_count; | |
2008 | if (symcount == 0) | |
2009 | return 0; | |
c9727e01 | 2010 | |
a5259595 AM |
2011 | syms = bfd_malloc ((symcount + 1) * sizeof (*syms)); |
2012 | if (syms == NULL) | |
2013 | return -1; | |
90e3cdf2 | 2014 | |
a5259595 AM |
2015 | if (!relocatable && static_count != 0 && dyn_count != 0) |
2016 | { | |
2017 | /* Use both symbol tables. */ | |
2018 | memcpy (syms, static_syms, static_count * sizeof (*syms)); | |
2019 | memcpy (syms + static_count, dyn_syms, | |
2020 | (dyn_count + 1) * sizeof (*syms)); | |
2021 | } | |
2022 | else if (!relocatable && static_count == 0) | |
2023 | memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms)); | |
2024 | else | |
2025 | memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms)); | |
90e3cdf2 | 2026 | |
0ccf57bd AM |
2027 | /* Trim uninteresting symbols. Interesting symbols are section, |
2028 | function, and notype symbols. */ | |
2029 | for (i = 0, j = 0; i < symcount; ++i) | |
2030 | if ((syms[i]->flags & (BSF_FILE | BSF_OBJECT | BSF_THREAD_LOCAL | |
2031 | | BSF_RELC | BSF_SRELC)) == 0) | |
2032 | syms[j++] = syms[i]; | |
2033 | symcount = j; | |
2034 | ||
a5259595 AM |
2035 | synthetic_relocatable = relocatable; |
2036 | synthetic_opd = opd; | |
2037 | qsort (syms, symcount, sizeof (*syms), compare_symbols); | |
90e3cdf2 | 2038 | |
a5259595 AM |
2039 | if (!relocatable && symcount > 1) |
2040 | { | |
bfa5bd2a PA |
2041 | /* Trim duplicate syms, since we may have merged the normal |
2042 | and dynamic symbols. Actually, we only care about syms | |
2043 | that have different values, so trim any with the same | |
2044 | value. Don't consider ifunc and ifunc resolver symbols | |
2045 | duplicates however, because GDB wants to know whether a | |
2046 | text symbol is an ifunc resolver. */ | |
a5259595 | 2047 | for (i = 1, j = 1; i < symcount; ++i) |
bfa5bd2a PA |
2048 | { |
2049 | const asymbol *s0 = syms[i - 1]; | |
2050 | const asymbol *s1 = syms[i]; | |
2051 | ||
2052 | if ((s0->value + s0->section->vma | |
2053 | != s1->value + s1->section->vma) | |
2054 | || ((s0->flags & BSF_GNU_INDIRECT_FUNCTION) | |
2055 | != (s1->flags & BSF_GNU_INDIRECT_FUNCTION))) | |
2056 | syms[j++] = syms[i]; | |
2057 | } | |
a5259595 AM |
2058 | symcount = j; |
2059 | } | |
699733f6 | 2060 | |
a5259595 AM |
2061 | i = 0; |
2062 | /* Note that here and in compare_symbols we can't compare opd and | |
2063 | sym->section directly. With separate debug info files, the | |
2064 | symbols will be extracted from the debug file while abfd passed | |
2065 | to this function is the real binary. */ | |
0ccf57bd | 2066 | if (strcmp (syms[i]->section->name, ".opd") == 0) |
a5259595 AM |
2067 | ++i; |
2068 | codesecsym = i; | |
2069 | ||
2070 | for (; i < symcount; ++i) | |
2071 | if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | |
2072 | | SEC_THREAD_LOCAL)) | |
2073 | != (SEC_CODE | SEC_ALLOC)) | |
2074 | || (syms[i]->flags & BSF_SECTION_SYM) == 0) | |
2075 | break; | |
2076 | codesecsymend = i; | |
2077 | ||
2078 | for (; i < symcount; ++i) | |
2079 | if ((syms[i]->flags & BSF_SECTION_SYM) == 0) | |
2080 | break; | |
2081 | secsymend = i; | |
2082 | ||
2083 | for (; i < symcount; ++i) | |
2084 | if (strcmp (syms[i]->section->name, ".opd") != 0) | |
2085 | break; | |
2086 | opdsymend = i; | |
2087 | ||
2088 | for (; i < symcount; ++i) | |
2cdcc330 AM |
2089 | if (((syms[i]->section->flags |
2090 | & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))) | |
a5259595 AM |
2091 | != (SEC_CODE | SEC_ALLOC)) |
2092 | break; | |
2093 | symcount = i; | |
2094 | } | |
c9727e01 | 2095 | count = 0; |
90e3cdf2 | 2096 | |
699733f6 | 2097 | if (relocatable) |
90e3cdf2 | 2098 | { |
699733f6 AM |
2099 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
2100 | arelent *r; | |
2101 | size_t size; | |
0ccf57bd | 2102 | size_t relcount; |
90e3cdf2 | 2103 | |
468392fb AM |
2104 | if (opdsymend == secsymend) |
2105 | goto done; | |
2106 | ||
699733f6 | 2107 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
90e3cdf2 | 2108 | relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0; |
7356fed5 | 2109 | if (relcount == 0) |
c9727e01 | 2110 | goto done; |
90e3cdf2 | 2111 | |
7356fed5 AM |
2112 | if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE)) |
2113 | { | |
2114 | count = -1; | |
2115 | goto done; | |
2116 | } | |
2117 | ||
699733f6 | 2118 | size = 0; |
595da8c5 | 2119 | for (i = secsymend, r = opd->relocation; i < opdsymend; ++i) |
699733f6 AM |
2120 | { |
2121 | asymbol *sym; | |
90e3cdf2 | 2122 | |
595da8c5 | 2123 | while (r < opd->relocation + relcount |
699733f6 AM |
2124 | && r->address < syms[i]->value + opd->vma) |
2125 | ++r; | |
90e3cdf2 | 2126 | |
595da8c5 | 2127 | if (r == opd->relocation + relcount) |
699733f6 | 2128 | break; |
90e3cdf2 | 2129 | |
699733f6 AM |
2130 | if (r->address != syms[i]->value + opd->vma) |
2131 | continue; | |
90e3cdf2 | 2132 | |
699733f6 AM |
2133 | if (r->howto->type != R_PPC64_ADDR64) |
2134 | continue; | |
90e3cdf2 | 2135 | |
699733f6 AM |
2136 | sym = *r->sym_ptr_ptr; |
2137 | if (!sym_exists_at (syms, opdsymend, symcount, | |
2138 | sym->section->id, sym->value + r->addend)) | |
2139 | { | |
2140 | ++count; | |
2141 | size += sizeof (asymbol); | |
2142 | size += strlen (syms[i]->name) + 2; | |
2143 | } | |
2144 | } | |
90e3cdf2 | 2145 | |
c4b0b099 AM |
2146 | if (size == 0) |
2147 | goto done; | |
699733f6 AM |
2148 | s = *ret = bfd_malloc (size); |
2149 | if (s == NULL) | |
2150 | { | |
7356fed5 | 2151 | count = -1; |
c9727e01 | 2152 | goto done; |
699733f6 | 2153 | } |
90e3cdf2 | 2154 | |
699733f6 | 2155 | names = (char *) (s + count); |
90e3cdf2 | 2156 | |
595da8c5 | 2157 | for (i = secsymend, r = opd->relocation; i < opdsymend; ++i) |
90e3cdf2 | 2158 | { |
699733f6 | 2159 | asymbol *sym; |
90e3cdf2 | 2160 | |
595da8c5 | 2161 | while (r < opd->relocation + relcount |
699733f6 AM |
2162 | && r->address < syms[i]->value + opd->vma) |
2163 | ++r; | |
90e3cdf2 | 2164 | |
595da8c5 | 2165 | if (r == opd->relocation + relcount) |
699733f6 AM |
2166 | break; |
2167 | ||
2168 | if (r->address != syms[i]->value + opd->vma) | |
2169 | continue; | |
2170 | ||
2171 | if (r->howto->type != R_PPC64_ADDR64) | |
2172 | continue; | |
90e3cdf2 | 2173 | |
699733f6 AM |
2174 | sym = *r->sym_ptr_ptr; |
2175 | if (!sym_exists_at (syms, opdsymend, symcount, | |
2176 | sym->section->id, sym->value + r->addend)) | |
2177 | { | |
2178 | size_t len; | |
2179 | ||
2180 | *s = *syms[i]; | |
6ba2a415 | 2181 | s->flags |= BSF_SYNTHETIC; |
699733f6 AM |
2182 | s->section = sym->section; |
2183 | s->value = sym->value + r->addend; | |
2184 | s->name = names; | |
2185 | *names++ = '.'; | |
2186 | len = strlen (syms[i]->name); | |
2187 | memcpy (names, syms[i]->name, len + 1); | |
2188 | names += len + 1; | |
6f610d07 UW |
2189 | /* Have udata.p point back to the original symbol this |
2190 | synthetic symbol was derived from. */ | |
2191 | s->udata.p = syms[i]; | |
699733f6 AM |
2192 | s++; |
2193 | } | |
2194 | } | |
2195 | } | |
2196 | else | |
90e3cdf2 | 2197 | { |
468392fb | 2198 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
ee67d69a | 2199 | bfd_byte *contents = NULL; |
699733f6 | 2200 | size_t size; |
0ccf57bd | 2201 | size_t plt_count = 0; |
468392fb AM |
2202 | bfd_vma glink_vma = 0, resolv_vma = 0; |
2203 | asection *dynamic, *glink = NULL, *relplt = NULL; | |
2204 | arelent *p; | |
90e3cdf2 | 2205 | |
ee67d69a | 2206 | if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents)) |
699733f6 | 2207 | { |
c4b0b099 AM |
2208 | free_contents_and_exit_err: |
2209 | count = -1; | |
ee67d69a | 2210 | free_contents_and_exit: |
699733f6 | 2211 | if (contents) |
ee67d69a | 2212 | free (contents); |
c9727e01 | 2213 | goto done; |
699733f6 | 2214 | } |
90e3cdf2 | 2215 | |
699733f6 AM |
2216 | size = 0; |
2217 | for (i = secsymend; i < opdsymend; ++i) | |
2218 | { | |
2219 | bfd_vma ent; | |
90e3cdf2 | 2220 | |
5ef11c02 AM |
2221 | /* Ignore bogus symbols. */ |
2222 | if (syms[i]->value > opd->size - 8) | |
2223 | continue; | |
2224 | ||
699733f6 AM |
2225 | ent = bfd_get_64 (abfd, contents + syms[i]->value); |
2226 | if (!sym_exists_at (syms, opdsymend, symcount, -1, ent)) | |
2227 | { | |
2228 | ++count; | |
2229 | size += sizeof (asymbol); | |
2230 | size += strlen (syms[i]->name) + 2; | |
2231 | } | |
2232 | } | |
90e3cdf2 | 2233 | |
468392fb | 2234 | /* Get start of .glink stubs from DT_PPC64_GLINK. */ |
066ee829 AM |
2235 | if (dyn_count != 0 |
2236 | && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL) | |
468392fb AM |
2237 | { |
2238 | bfd_byte *dynbuf, *extdyn, *extdynend; | |
2239 | size_t extdynsize; | |
2240 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
2241 | ||
2242 | if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) | |
c4b0b099 | 2243 | goto free_contents_and_exit_err; |
468392fb AM |
2244 | |
2245 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; | |
2246 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
2247 | ||
2248 | extdyn = dynbuf; | |
2249 | extdynend = extdyn + dynamic->size; | |
2250 | for (; extdyn < extdynend; extdyn += extdynsize) | |
2251 | { | |
2252 | Elf_Internal_Dyn dyn; | |
2253 | (*swap_dyn_in) (abfd, extdyn, &dyn); | |
2254 | ||
2255 | if (dyn.d_tag == DT_NULL) | |
2256 | break; | |
2257 | ||
2258 | if (dyn.d_tag == DT_PPC64_GLINK) | |
2259 | { | |
9e390558 AM |
2260 | /* The first glink stub starts at DT_PPC64_GLINK plus 32. |
2261 | See comment in ppc64_elf_finish_dynamic_sections. */ | |
2262 | glink_vma = dyn.d_un.d_val + 8 * 4; | |
468392fb AM |
2263 | /* The .glink section usually does not survive the final |
2264 | link; search for the section (usually .text) where the | |
2265 | glink stubs now reside. */ | |
2266 | glink = bfd_sections_find_if (abfd, section_covers_vma, | |
2267 | &glink_vma); | |
2268 | break; | |
2269 | } | |
2270 | } | |
2271 | ||
2272 | free (dynbuf); | |
2273 | } | |
2274 | ||
2275 | if (glink != NULL) | |
2276 | { | |
2277 | /* Determine __glink trampoline by reading the relative branch | |
2278 | from the first glink stub. */ | |
2279 | bfd_byte buf[4]; | |
b9e5796b AM |
2280 | unsigned int off = 0; |
2281 | ||
2282 | while (bfd_get_section_contents (abfd, glink, buf, | |
2283 | glink_vma + off - glink->vma, 4)) | |
468392fb AM |
2284 | { |
2285 | unsigned int insn = bfd_get_32 (abfd, buf); | |
2286 | insn ^= B_DOT; | |
2287 | if ((insn & ~0x3fffffc) == 0) | |
b9e5796b | 2288 | { |
2cdcc330 AM |
2289 | resolv_vma |
2290 | = glink_vma + off + (insn ^ 0x2000000) - 0x2000000; | |
b9e5796b AM |
2291 | break; |
2292 | } | |
2293 | off += 4; | |
2294 | if (off > 4) | |
2295 | break; | |
468392fb AM |
2296 | } |
2297 | ||
2298 | if (resolv_vma) | |
2299 | size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); | |
468392fb | 2300 | |
066ee829 AM |
2301 | relplt = bfd_get_section_by_name (abfd, ".rela.plt"); |
2302 | if (relplt != NULL) | |
2303 | { | |
2304 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; | |
2cdcc330 | 2305 | if (!(*slurp_relocs) (abfd, relplt, dyn_syms, TRUE)) |
c4b0b099 | 2306 | goto free_contents_and_exit_err; |
68ffbac6 | 2307 | |
066ee829 AM |
2308 | plt_count = relplt->size / sizeof (Elf64_External_Rela); |
2309 | size += plt_count * sizeof (asymbol); | |
468392fb | 2310 | |
066ee829 AM |
2311 | p = relplt->relocation; |
2312 | for (i = 0; i < plt_count; i++, p++) | |
e054468f AM |
2313 | { |
2314 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); | |
2315 | if (p->addend != 0) | |
2316 | size += sizeof ("+0x") - 1 + 16; | |
2317 | } | |
066ee829 | 2318 | } |
468392fb AM |
2319 | } |
2320 | ||
c4b0b099 AM |
2321 | if (size == 0) |
2322 | goto free_contents_and_exit; | |
699733f6 AM |
2323 | s = *ret = bfd_malloc (size); |
2324 | if (s == NULL) | |
c4b0b099 | 2325 | goto free_contents_and_exit_err; |
90e3cdf2 | 2326 | |
468392fb | 2327 | names = (char *) (s + count + plt_count + (resolv_vma != 0)); |
90e3cdf2 | 2328 | |
699733f6 | 2329 | for (i = secsymend; i < opdsymend; ++i) |
90e3cdf2 | 2330 | { |
699733f6 | 2331 | bfd_vma ent; |
90e3cdf2 | 2332 | |
5ef11c02 AM |
2333 | if (syms[i]->value > opd->size - 8) |
2334 | continue; | |
2335 | ||
699733f6 AM |
2336 | ent = bfd_get_64 (abfd, contents + syms[i]->value); |
2337 | if (!sym_exists_at (syms, opdsymend, symcount, -1, ent)) | |
90e3cdf2 | 2338 | { |
0ccf57bd | 2339 | size_t lo, hi; |
699733f6 | 2340 | size_t len; |
c9727e01 | 2341 | asection *sec = abfd->sections; |
90e3cdf2 | 2342 | |
699733f6 AM |
2343 | *s = *syms[i]; |
2344 | lo = codesecsym; | |
2345 | hi = codesecsymend; | |
2346 | while (lo < hi) | |
2347 | { | |
0ccf57bd | 2348 | size_t mid = (lo + hi) >> 1; |
699733f6 AM |
2349 | if (syms[mid]->section->vma < ent) |
2350 | lo = mid + 1; | |
2351 | else if (syms[mid]->section->vma > ent) | |
2352 | hi = mid; | |
2353 | else | |
c9727e01 AM |
2354 | { |
2355 | sec = syms[mid]->section; | |
2356 | break; | |
2357 | } | |
699733f6 AM |
2358 | } |
2359 | ||
c9727e01 | 2360 | if (lo >= hi && lo > codesecsym) |
699733f6 | 2361 | sec = syms[lo - 1]->section; |
699733f6 AM |
2362 | |
2363 | for (; sec != NULL; sec = sec->next) | |
2364 | { | |
2365 | if (sec->vma > ent) | |
2366 | break; | |
63524580 JK |
2367 | /* SEC_LOAD may not be set if SEC is from a separate debug |
2368 | info file. */ | |
2369 | if ((sec->flags & SEC_ALLOC) == 0) | |
699733f6 AM |
2370 | break; |
2371 | if ((sec->flags & SEC_CODE) != 0) | |
2372 | s->section = sec; | |
2373 | } | |
6ba2a415 | 2374 | s->flags |= BSF_SYNTHETIC; |
699733f6 AM |
2375 | s->value = ent - s->section->vma; |
2376 | s->name = names; | |
2377 | *names++ = '.'; | |
2378 | len = strlen (syms[i]->name); | |
2379 | memcpy (names, syms[i]->name, len + 1); | |
2380 | names += len + 1; | |
6f610d07 UW |
2381 | /* Have udata.p point back to the original symbol this |
2382 | synthetic symbol was derived from. */ | |
2383 | s->udata.p = syms[i]; | |
699733f6 | 2384 | s++; |
90e3cdf2 | 2385 | } |
90e3cdf2 | 2386 | } |
699733f6 | 2387 | free (contents); |
468392fb AM |
2388 | |
2389 | if (glink != NULL && relplt != NULL) | |
2390 | { | |
2391 | if (resolv_vma) | |
2392 | { | |
2393 | /* Add a symbol for the main glink trampoline. */ | |
86a4952b | 2394 | memset (s, 0, sizeof *s); |
468392fb | 2395 | s->the_bfd = abfd; |
6ba2a415 | 2396 | s->flags = BSF_GLOBAL | BSF_SYNTHETIC; |
468392fb AM |
2397 | s->section = glink; |
2398 | s->value = resolv_vma - glink->vma; | |
2399 | s->name = names; | |
2cdcc330 AM |
2400 | memcpy (names, "__glink_PLTresolve", |
2401 | sizeof ("__glink_PLTresolve")); | |
468392fb AM |
2402 | names += sizeof ("__glink_PLTresolve"); |
2403 | s++; | |
2404 | count++; | |
2405 | } | |
2406 | ||
2407 | /* FIXME: It would be very much nicer to put sym@plt on the | |
2408 | stub rather than on the glink branch table entry. The | |
2409 | objdump disassembler would then use a sensible symbol | |
2410 | name on plt calls. The difficulty in doing so is | |
2411 | a) finding the stubs, and, | |
2412 | b) matching stubs against plt entries, and, | |
2413 | c) there can be multiple stubs for a given plt entry. | |
2414 | ||
2415 | Solving (a) could be done by code scanning, but older | |
2416 | ppc64 binaries used different stubs to current code. | |
2417 | (b) is the tricky one since you need to known the toc | |
2418 | pointer for at least one function that uses a pic stub to | |
2419 | be able to calculate the plt address referenced. | |
2420 | (c) means gdb would need to set multiple breakpoints (or | |
2421 | find the glink branch itself) when setting breakpoints | |
2422 | for pending shared library loads. */ | |
2423 | p = relplt->relocation; | |
2424 | for (i = 0; i < plt_count; i++, p++) | |
2425 | { | |
2426 | size_t len; | |
2427 | ||
2428 | *s = **p->sym_ptr_ptr; | |
2429 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since | |
2430 | we are defining a symbol, ensure one of them is set. */ | |
2431 | if ((s->flags & BSF_LOCAL) == 0) | |
2432 | s->flags |= BSF_GLOBAL; | |
6ba2a415 | 2433 | s->flags |= BSF_SYNTHETIC; |
468392fb AM |
2434 | s->section = glink; |
2435 | s->value = glink_vma - glink->vma; | |
2436 | s->name = names; | |
2437 | s->udata.p = NULL; | |
2438 | len = strlen ((*p->sym_ptr_ptr)->name); | |
2439 | memcpy (names, (*p->sym_ptr_ptr)->name, len); | |
2440 | names += len; | |
e054468f AM |
2441 | if (p->addend != 0) |
2442 | { | |
2443 | memcpy (names, "+0x", sizeof ("+0x") - 1); | |
2444 | names += sizeof ("+0x") - 1; | |
2445 | bfd_sprintf_vma (abfd, names, p->addend); | |
2446 | names += strlen (names); | |
2447 | } | |
468392fb AM |
2448 | memcpy (names, "@plt", sizeof ("@plt")); |
2449 | names += sizeof ("@plt"); | |
2450 | s++; | |
b9e5796b AM |
2451 | if (abi < 2) |
2452 | { | |
2453 | glink_vma += 8; | |
2454 | if (i >= 0x8000) | |
2455 | glink_vma += 4; | |
2456 | } | |
2457 | else | |
468392fb AM |
2458 | glink_vma += 4; |
2459 | } | |
2460 | count += plt_count; | |
2461 | } | |
90e3cdf2 JJ |
2462 | } |
2463 | ||
c9727e01 | 2464 | done: |
a7535cf3 | 2465 | free (syms); |
90e3cdf2 JJ |
2466 | return count; |
2467 | } | |
5bd4f169 | 2468 | \f |
65f38f15 AM |
2469 | /* The following functions are specific to the ELF linker, while |
2470 | functions above are used generally. Those named ppc64_elf_* are | |
2471 | called by the main ELF linker code. They appear in this file more | |
2472 | or less in the order in which they are called. eg. | |
2473 | ppc64_elf_check_relocs is called early in the link process, | |
2474 | ppc64_elf_finish_dynamic_sections is one of the last functions | |
e86ce104 AM |
2475 | called. |
2476 | ||
2477 | PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that | |
2478 | functions have both a function code symbol and a function descriptor | |
2479 | symbol. A call to foo in a relocatable object file looks like: | |
2480 | ||
2481 | . .text | |
2482 | . x: | |
2483 | . bl .foo | |
2484 | . nop | |
2485 | ||
2486 | The function definition in another object file might be: | |
2487 | ||
2488 | . .section .opd | |
2489 | . foo: .quad .foo | |
2490 | . .quad .TOC.@tocbase | |
2491 | . .quad 0 | |
2492 | . | |
2493 | . .text | |
2494 | . .foo: blr | |
2495 | ||
2496 | When the linker resolves the call during a static link, the branch | |
2497 | unsurprisingly just goes to .foo and the .opd information is unused. | |
2498 | If the function definition is in a shared library, things are a little | |
2499 | different: The call goes via a plt call stub, the opd information gets | |
2500 | copied to the plt, and the linker patches the nop. | |
2501 | ||
2502 | . x: | |
2503 | . bl .foo_stub | |
2504 | . ld 2,40(1) | |
2505 | . | |
2506 | . | |
2507 | . .foo_stub: | |
71a39c98 AM |
2508 | . std 2,40(1) # in practice, the call stub |
2509 | . addis 11,2,Lfoo@toc@ha # is slightly optimized, but | |
2510 | . addi 11,11,Lfoo@toc@l # this is the general idea | |
2511 | . ld 12,0(11) | |
2512 | . ld 2,8(11) | |
2513 | . mtctr 12 | |
2514 | . ld 11,16(11) | |
e86ce104 AM |
2515 | . bctr |
2516 | . | |
2517 | . .section .plt | |
2518 | . Lfoo: reloc (R_PPC64_JMP_SLOT, foo) | |
2519 | ||
2520 | The "reloc ()" notation is supposed to indicate that the linker emits | |
2521 | an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd | |
2522 | copying. | |
2523 | ||
2524 | What are the difficulties here? Well, firstly, the relocations | |
2525 | examined by the linker in check_relocs are against the function code | |
2526 | sym .foo, while the dynamic relocation in the plt is emitted against | |
2527 | the function descriptor symbol, foo. Somewhere along the line, we need | |
2528 | to carefully copy dynamic link information from one symbol to the other. | |
2529 | Secondly, the generic part of the elf linker will make .foo a dynamic | |
2530 | symbol as is normal for most other backends. We need foo dynamic | |
2531 | instead, at least for an application final link. However, when | |
2532 | creating a shared library containing foo, we need to have both symbols | |
2533 | dynamic so that references to .foo are satisfied during the early | |
2534 | stages of linking. Otherwise the linker might decide to pull in a | |
8387904d AM |
2535 | definition from some other object, eg. a static library. |
2536 | ||
2537 | Update: As of August 2004, we support a new convention. Function | |
2538 | calls may use the function descriptor symbol, ie. "bl foo". This | |
2539 | behaves exactly as "bl .foo". */ | |
65f38f15 | 2540 | |
7c8bbca5 AM |
2541 | /* Of those relocs that might be copied as dynamic relocs, this |
2542 | function selects those that must be copied when linking a shared | |
2543 | library or PIE, even when the symbol is local. */ | |
65f38f15 | 2544 | |
1d483afe AM |
2545 | static int |
2546 | must_be_dyn_reloc (struct bfd_link_info *info, | |
2547 | enum elf_ppc64_reloc_type r_type) | |
2548 | { | |
2549 | switch (r_type) | |
2550 | { | |
2551 | default: | |
7c8bbca5 AM |
2552 | /* Only relative relocs can be resolved when the object load |
2553 | address isn't fixed. DTPREL64 is excluded because the | |
2554 | dynamic linker needs to differentiate global dynamic from | |
2555 | local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */ | |
1d483afe AM |
2556 | return 1; |
2557 | ||
2558 | case R_PPC64_REL32: | |
2559 | case R_PPC64_REL64: | |
2560 | case R_PPC64_REL30: | |
2561 | return 0; | |
2562 | ||
2563 | case R_PPC64_TPREL16: | |
2564 | case R_PPC64_TPREL16_LO: | |
2565 | case R_PPC64_TPREL16_HI: | |
2566 | case R_PPC64_TPREL16_HA: | |
2567 | case R_PPC64_TPREL16_DS: | |
2568 | case R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
2569 | case R_PPC64_TPREL16_HIGH: |
2570 | case R_PPC64_TPREL16_HIGHA: | |
1d483afe AM |
2571 | case R_PPC64_TPREL16_HIGHER: |
2572 | case R_PPC64_TPREL16_HIGHERA: | |
2573 | case R_PPC64_TPREL16_HIGHEST: | |
2574 | case R_PPC64_TPREL16_HIGHESTA: | |
2575 | case R_PPC64_TPREL64: | |
7c8bbca5 AM |
2576 | /* These relocations are relative but in a shared library the |
2577 | linker doesn't know the thread pointer base. */ | |
2578 | return bfd_link_dll (info); | |
1d483afe AM |
2579 | } |
2580 | } | |
65f38f15 | 2581 | |
f4656909 AM |
2582 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
2583 | copying dynamic variables from a shared lib into an app's dynbss | |
2584 | section, and instead use a dynamic relocation to point into the | |
5d35169e AM |
2585 | shared lib. With code that gcc generates, it's vital that this be |
2586 | enabled; In the PowerPC64 ABI, the address of a function is actually | |
2587 | the address of a function descriptor, which resides in the .opd | |
2588 | section. gcc uses the descriptor directly rather than going via the | |
2589 | GOT as some other ABI's do, which means that initialized function | |
2590 | pointers must reference the descriptor. Thus, a function pointer | |
2591 | initialized to the address of a function in a shared library will | |
2592 | either require a copy reloc, or a dynamic reloc. Using a copy reloc | |
4cc11e76 | 2593 | redefines the function descriptor symbol to point to the copy. This |
5d35169e AM |
2594 | presents a problem as a plt entry for that function is also |
2595 | initialized from the function descriptor symbol and the copy reloc | |
2596 | may not be initialized first. */ | |
a23b6845 | 2597 | #define ELIMINATE_COPY_RELOCS 1 |
f4656909 | 2598 | |
721956f4 | 2599 | /* Section name for stubs is the associated section name plus this |
29942be8 NC |
2600 | string. */ |
2601 | #define STUB_SUFFIX ".stub" | |
721956f4 AM |
2602 | |
2603 | /* Linker stubs. | |
2604 | ppc_stub_long_branch: | |
2605 | Used when a 14 bit branch (or even a 24 bit branch) can't reach its | |
2606 | destination, but a 24 bit branch in a stub section will reach. | |
2607 | . b dest | |
2608 | ||
2609 | ppc_stub_plt_branch: | |
2610 | Similar to the above, but a 24 bit branch in the stub section won't | |
2611 | reach its destination. | |
71a39c98 AM |
2612 | . addis %r11,%r2,xxx@toc@ha |
2613 | . ld %r12,xxx@toc@l(%r11) | |
2614 | . mtctr %r12 | |
721956f4 AM |
2615 | . bctr |
2616 | ||
2617 | ppc_stub_plt_call: | |
2c66dc6c AM |
2618 | Used to call a function in a shared library. If it so happens that |
2619 | the plt entry referenced crosses a 64k boundary, then an extra | |
71a39c98 | 2620 | "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr". |
05d0e962 | 2621 | ppc_stub_plt_call_r2save starts with "std %r2,40(%r1)". |
71a39c98 AM |
2622 | . addis %r11,%r2,xxx@toc@ha |
2623 | . ld %r12,xxx+0@toc@l(%r11) | |
2624 | . mtctr %r12 | |
2625 | . ld %r2,xxx+8@toc@l(%r11) | |
2626 | . ld %r11,xxx+16@toc@l(%r11) | |
721956f4 | 2627 | . bctr |
ad8e1ba5 AM |
2628 | |
2629 | ppc_stub_long_branch and ppc_stub_plt_branch may also have additional | |
2630 | code to adjust the value and save r2 to support multiple toc sections. | |
2631 | A ppc_stub_long_branch with an r2 offset looks like: | |
2632 | . std %r2,40(%r1) | |
2633 | . addis %r2,%r2,off@ha | |
2634 | . addi %r2,%r2,off@l | |
2635 | . b dest | |
2636 | ||
2637 | A ppc_stub_plt_branch with an r2 offset looks like: | |
2638 | . std %r2,40(%r1) | |
71a39c98 AM |
2639 | . addis %r11,%r2,xxx@toc@ha |
2640 | . ld %r12,xxx@toc@l(%r11) | |
ad8e1ba5 AM |
2641 | . addis %r2,%r2,off@ha |
2642 | . addi %r2,%r2,off@l | |
71a39c98 | 2643 | . mtctr %r12 |
ad8e1ba5 | 2644 | . bctr |
ac2df442 | 2645 | |
05d0e962 AM |
2646 | All of the above stubs are shown as their ELFv1 variants. ELFv2 |
2647 | variants exist too, simpler for plt calls since a new toc pointer | |
2648 | and static chain are not loaded by the stub. In addition, ELFv2 | |
2649 | has some more complex stubs to handle calls marked with NOTOC | |
2650 | relocs from functions where r2 is not a valid toc pointer. These | |
2651 | come in two flavours, the ones shown below, and _both variants that | |
2652 | start with "std %r2,24(%r1)" to save r2 in the unlikely event that | |
2653 | one call is from a function where r2 is used as the toc pointer but | |
2654 | needs a toc adjusting stub for small-model multi-toc, and another | |
2655 | call is from a function where r2 is not valid. | |
2656 | ppc_stub_long_branch_notoc: | |
2657 | . mflr %r12 | |
2658 | . bcl 20,31,1f | |
2659 | . 1: | |
2660 | . mflr %r11 | |
2661 | . mtlr %r12 | |
2cdcc330 AM |
2662 | . addis %r12,%r11,dest-1b@ha |
2663 | . addi %r12,%r12,dest-1b@l | |
05d0e962 AM |
2664 | . b dest |
2665 | ||
2666 | ppc_stub_plt_branch_notoc: | |
2667 | . mflr %r12 | |
2668 | . bcl 20,31,1f | |
2669 | . 1: | |
2670 | . mflr %r11 | |
2671 | . mtlr %r12 | |
2672 | . lis %r12,xxx-1b@highest | |
f891966f | 2673 | . ori %r12,%r12,xxx-1b@higher |
05d0e962 | 2674 | . sldi %r12,%r12,32 |
f891966f | 2675 | . oris %r12,%r12,xxx-1b@high |
05d0e962 AM |
2676 | . ori %r12,%r12,xxx-1b@l |
2677 | . add %r12,%r11,%r12 | |
2678 | . mtctr %r12 | |
2679 | . bctr | |
2680 | ||
2681 | ppc_stub_plt_call_notoc: | |
2682 | . mflr %r12 | |
2683 | . bcl 20,31,1f | |
2684 | . 1: | |
2685 | . mflr %r11 | |
2686 | . mtlr %r12 | |
2687 | . lis %r12,xxx-1b@highest | |
f891966f | 2688 | . ori %r12,%r12,xxx-1b@higher |
05d0e962 | 2689 | . sldi %r12,%r12,32 |
f891966f | 2690 | . oris %r12,%r12,xxx-1b@high |
05d0e962 AM |
2691 | . ori %r12,%r12,xxx-1b@l |
2692 | . ldx %r12,%r11,%r12 | |
2693 | . mtctr %r12 | |
2694 | . bctr | |
2695 | ||
2696 | In cases where the high instructions would add zero, they are | |
2697 | omitted and following instructions modified in some cases. | |
2698 | ||
2699 | For a given stub group (a set of sections all using the same toc | |
2700 | pointer value) there will be just one stub type used for any | |
2701 | particular function symbol. For example, if printf is called from | |
2702 | code with the tocsave optimization (ie. r2 saved in function | |
2703 | prologue) and therefore calls use a ppc_stub_plt_call linkage stub, | |
2704 | and from other code without the tocsave optimization requiring a | |
2705 | ppc_stub_plt_call_r2save linkage stub, a single stub of the latter | |
2706 | type will be created. Calls with the tocsave optimization will | |
2707 | enter this stub after the instruction saving r2. A similar | |
2708 | situation exists when calls are marked with R_PPC64_REL24_NOTOC | |
2709 | relocations. These require a ppc_stub_plt_call_notoc linkage stub | |
2710 | to call an external function like printf. If other calls to printf | |
2711 | require a ppc_stub_plt_call linkage stub then a single | |
2712 | ppc_stub_plt_call_notoc linkage stub will be used for both types of | |
2713 | call. If other calls to printf require a ppc_stub_plt_call_r2save | |
2714 | linkage stub then a single ppc_stub_plt_call_both linkage stub will | |
2715 | be created and calls not requiring r2 to be saved will enter the | |
2716 | stub after the r2 save instruction. There is an analogous | |
2717 | hierarchy of long branch and plt branch stubs for local call | |
2718 | linkage. */ | |
721956f4 | 2719 | |
2cdcc330 AM |
2720 | enum ppc_stub_type |
2721 | { | |
721956f4 AM |
2722 | ppc_stub_none, |
2723 | ppc_stub_long_branch, | |
ad8e1ba5 | 2724 | ppc_stub_long_branch_r2off, |
05d0e962 AM |
2725 | ppc_stub_long_branch_notoc, |
2726 | ppc_stub_long_branch_both, /* r2off and notoc variants both needed. */ | |
721956f4 | 2727 | ppc_stub_plt_branch, |
ad8e1ba5 | 2728 | ppc_stub_plt_branch_r2off, |
05d0e962 AM |
2729 | ppc_stub_plt_branch_notoc, |
2730 | ppc_stub_plt_branch_both, | |
794e51c0 | 2731 | ppc_stub_plt_call, |
7341d5e2 | 2732 | ppc_stub_plt_call_r2save, |
05d0e962 AM |
2733 | ppc_stub_plt_call_notoc, |
2734 | ppc_stub_plt_call_both, | |
a4b6fadd AM |
2735 | ppc_stub_global_entry, |
2736 | ppc_stub_save_res | |
721956f4 AM |
2737 | }; |
2738 | ||
6f20ed8a AM |
2739 | /* Information on stub grouping. */ |
2740 | struct map_stub | |
2741 | { | |
2742 | /* The stub section. */ | |
2743 | asection *stub_sec; | |
2744 | /* This is the section to which stubs in the group will be attached. */ | |
2745 | asection *link_sec; | |
a4b6fadd AM |
2746 | /* Next group. */ |
2747 | struct map_stub *next; | |
2748 | /* Whether to emit a copy of register save/restore functions in this | |
2749 | group. */ | |
2750 | int needs_save_res; | |
df136d64 AM |
2751 | /* Current offset within stubs after the insn restoring lr in a |
2752 | _notoc or _both stub using bcl for pc-relative addressing, or | |
2753 | after the insn restoring lr in a __tls_get_addr_opt plt stub. */ | |
2754 | unsigned int lr_restore; | |
2755 | /* Accumulated size of EH info emitted to describe return address | |
2756 | if stubs modify lr. Does not include 17 byte FDE header. */ | |
2757 | unsigned int eh_size; | |
2758 | /* Offset in glink_eh_frame to the start of EH info for this group. */ | |
2759 | unsigned int eh_base; | |
6f20ed8a AM |
2760 | }; |
2761 | ||
2cdcc330 AM |
2762 | struct ppc_stub_hash_entry |
2763 | { | |
721956f4 AM |
2764 | /* Base hash table entry structure. */ |
2765 | struct bfd_hash_entry root; | |
2766 | ||
ad8e1ba5 AM |
2767 | enum ppc_stub_type stub_type; |
2768 | ||
6f20ed8a AM |
2769 | /* Group information. */ |
2770 | struct map_stub *group; | |
721956f4 AM |
2771 | |
2772 | /* Offset within stub_sec of the beginning of this stub. */ | |
2773 | bfd_vma stub_offset; | |
2774 | ||
2775 | /* Given the symbol's value and its section we can determine its final | |
2776 | value when building the stubs (so the stub knows where to jump. */ | |
2777 | bfd_vma target_value; | |
2778 | asection *target_section; | |
2779 | ||
721956f4 AM |
2780 | /* The symbol table entry, if any, that this was derived from. */ |
2781 | struct ppc_link_hash_entry *h; | |
e054468f | 2782 | struct plt_entry *plt_ent; |
721956f4 | 2783 | |
2d7ad24e AM |
2784 | /* Symbol type. */ |
2785 | unsigned char symtype; | |
2786 | ||
6911b7dc AM |
2787 | /* Symbol st_other. */ |
2788 | unsigned char other; | |
721956f4 AM |
2789 | }; |
2790 | ||
2cdcc330 AM |
2791 | struct ppc_branch_hash_entry |
2792 | { | |
721956f4 AM |
2793 | /* Base hash table entry structure. */ |
2794 | struct bfd_hash_entry root; | |
2795 | ||
c456f082 | 2796 | /* Offset within branch lookup table. */ |
721956f4 AM |
2797 | unsigned int offset; |
2798 | ||
2799 | /* Generation marker. */ | |
2800 | unsigned int iter; | |
2801 | }; | |
65f38f15 | 2802 | |
19e08130 AM |
2803 | /* Used to track dynamic relocations for local symbols. */ |
2804 | struct ppc_dyn_relocs | |
2805 | { | |
2806 | struct ppc_dyn_relocs *next; | |
2807 | ||
2808 | /* The input section of the reloc. */ | |
2809 | asection *sec; | |
2810 | ||
2811 | /* Total number of relocs copied for the input section. */ | |
2812 | unsigned int count : 31; | |
2813 | ||
2814 | /* Whether this entry is for STT_GNU_IFUNC symbols. */ | |
2815 | unsigned int ifunc : 1; | |
2816 | }; | |
2817 | ||
65f38f15 AM |
2818 | struct ppc_link_hash_entry |
2819 | { | |
2820 | struct elf_link_hash_entry elf; | |
2821 | ||
2cdcc330 AM |
2822 | union |
2823 | { | |
b3fac117 AM |
2824 | /* A pointer to the most recently used stub hash entry against this |
2825 | symbol. */ | |
2826 | struct ppc_stub_hash_entry *stub_cache; | |
2827 | ||
2828 | /* A pointer to the next symbol starting with a '.' */ | |
2829 | struct ppc_link_hash_entry *next_dot_sym; | |
2830 | } u; | |
721956f4 | 2831 | |
65f38f15 | 2832 | /* Track dynamic relocs copied for this symbol. */ |
6061a67d | 2833 | struct elf_dyn_relocs *dyn_relocs; |
e86ce104 | 2834 | |
721956f4 | 2835 | /* Link between function code and descriptor symbols. */ |
34814b9f | 2836 | struct ppc_link_hash_entry *oh; |
721956f4 | 2837 | |
e86ce104 AM |
2838 | /* Flag function code and descriptor symbols. */ |
2839 | unsigned int is_func:1; | |
2840 | unsigned int is_func_descriptor:1; | |
908b32fc | 2841 | unsigned int fake:1; |
411e1bfb | 2842 | |
c5614fa4 AM |
2843 | /* Whether global opd/toc sym has been adjusted or not. |
2844 | After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag | |
2845 | should be set for all globals defined in any opd/toc section. */ | |
754021d0 AM |
2846 | unsigned int adjust_done:1; |
2847 | ||
a4b6fadd AM |
2848 | /* Set if this is an out-of-line register save/restore function, |
2849 | with non-standard calling convention. */ | |
2850 | unsigned int save_res:1; | |
2851 | ||
8b5f1ed8 AM |
2852 | /* Set if a duplicate symbol with non-zero localentry is detected, |
2853 | even when the duplicate symbol does not provide a definition. */ | |
2854 | unsigned int non_zero_localentry:1; | |
2855 | ||
411e1bfb | 2856 | /* Contexts in which symbol is used in the GOT (or TOC). |
37da22e5 AM |
2857 | Bits are or'd into the mask as the corresponding relocs are |
2858 | encountered during check_relocs, with TLS_TLS being set when any | |
2859 | of the other TLS bits are set. tls_optimize clears bits when | |
2860 | optimizing to indicate the corresponding GOT entry type is not | |
2861 | needed. If set, TLS_TLS is never cleared. tls_optimize may also | |
2862 | set TLS_TPRELGD when a GD reloc turns into a TPREL one. We use a | |
2863 | separate flag rather than setting TPREL just for convenience in | |
2864 | distinguishing the two cases. | |
2865 | These flags are also kept for local symbols. */ | |
2866 | #define TLS_TLS 1 /* Any TLS reloc. */ | |
2867 | #define TLS_GD 2 /* GD reloc. */ | |
2868 | #define TLS_LD 4 /* LD reloc. */ | |
2869 | #define TLS_TPREL 8 /* TPREL reloc, => IE. */ | |
2870 | #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */ | |
2871 | #define TLS_MARK 32 /* __tls_get_addr call marked. */ | |
e7b938ca | 2872 | #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */ |
37da22e5 | 2873 | #define TLS_EXPLICIT 128 /* Marks TOC section TLS relocs. */ |
f961d9dd | 2874 | unsigned char tls_mask; |
37da22e5 AM |
2875 | |
2876 | /* The above field is also used to mark function symbols. In which | |
2877 | case TLS_TLS will be 0. */ | |
2878 | #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */ | |
2d7ad24e | 2879 | #define PLT_KEEP 4 /* inline plt call requires plt entry. */ |
37da22e5 | 2880 | #define NON_GOT 256 /* local symbol plt, not stored. */ |
65f38f15 AM |
2881 | }; |
2882 | ||
2883 | /* ppc64 ELF linker hash table. */ | |
2884 | ||
2885 | struct ppc_link_hash_table | |
2886 | { | |
2887 | struct elf_link_hash_table elf; | |
2888 | ||
721956f4 AM |
2889 | /* The stub hash table. */ |
2890 | struct bfd_hash_table stub_hash_table; | |
2891 | ||
2892 | /* Another hash table for plt_branch stubs. */ | |
2893 | struct bfd_hash_table branch_hash_table; | |
2894 | ||
3b421ab3 AM |
2895 | /* Hash table for function prologue tocsave. */ |
2896 | htab_t tocsave_htab; | |
2897 | ||
e7d1c40c AM |
2898 | /* Various options and other info passed from the linker. */ |
2899 | struct ppc64_elf_params *params; | |
721956f4 | 2900 | |
6f20ed8a AM |
2901 | /* The size of sec_info below. */ |
2902 | unsigned int sec_info_arr_size; | |
2903 | ||
2904 | /* Per-section array of extra section info. Done this way rather | |
2905 | than as part of ppc64_elf_section_data so we have the info for | |
2906 | non-ppc64 sections. */ | |
2907 | struct | |
2908 | { | |
2909 | /* Along with elf_gp, specifies the TOC pointer used by this section. */ | |
ad8e1ba5 | 2910 | bfd_vma toc_off; |
6f20ed8a AM |
2911 | |
2912 | union | |
2913 | { | |
2914 | /* The section group that this section belongs to. */ | |
2915 | struct map_stub *group; | |
2916 | /* A temp section list pointer. */ | |
2917 | asection *list; | |
2918 | } u; | |
2919 | } *sec_info; | |
721956f4 | 2920 | |
a4b6fadd AM |
2921 | /* Linked list of groups. */ |
2922 | struct map_stub *group; | |
2923 | ||
ad8e1ba5 AM |
2924 | /* Temp used when calculating TOC pointers. */ |
2925 | bfd_vma toc_curr; | |
bf102f86 AM |
2926 | bfd *toc_bfd; |
2927 | asection *toc_first_sec; | |
ad8e1ba5 | 2928 | |
b3fac117 AM |
2929 | /* Used when adding symbols. */ |
2930 | struct ppc_link_hash_entry *dot_syms; | |
2931 | ||
33e44f2e | 2932 | /* Shortcuts to get to dynamic linker sections. */ |
4ce794b7 | 2933 | asection *glink; |
9e390558 | 2934 | asection *global_entry; |
82bd7b59 | 2935 | asection *sfpr; |
2d7ad24e AM |
2936 | asection *pltlocal; |
2937 | asection *relpltlocal; | |
4ce794b7 AM |
2938 | asection *brlt; |
2939 | asection *relbrlt; | |
58d180e8 | 2940 | asection *glink_eh_frame; |
ec338859 | 2941 | |
8387904d AM |
2942 | /* Shortcut to .__tls_get_addr and __tls_get_addr. */ |
2943 | struct ppc_link_hash_entry *tls_get_addr; | |
2944 | struct ppc_link_hash_entry *tls_get_addr_fd; | |
411e1bfb | 2945 | |
927be08e AM |
2946 | /* The size of reliplt used by got entry relocs. */ |
2947 | bfd_size_type got_reli_size; | |
2948 | ||
9b5ecbd0 | 2949 | /* Statistics. */ |
7341d5e2 | 2950 | unsigned long stub_count[ppc_stub_global_entry]; |
9b5ecbd0 | 2951 | |
ee75fd95 AM |
2952 | /* Number of stubs against global syms. */ |
2953 | unsigned long stub_globals; | |
2954 | ||
ee67d69a AM |
2955 | /* Set if we're linking code with function descriptors. */ |
2956 | unsigned int opd_abi:1; | |
2957 | ||
4c52953f | 2958 | /* Support for multiple toc sections. */ |
33c0ec9d | 2959 | unsigned int do_multi_toc:1; |
4c52953f | 2960 | unsigned int multi_toc_needed:1; |
927be08e | 2961 | unsigned int second_toc_pass:1; |
67f0cbdb | 2962 | unsigned int do_toc_opt:1; |
4c52953f | 2963 | |
9a23f96e AM |
2964 | /* Set if tls optimization is enabled. */ |
2965 | unsigned int do_tls_opt:1; | |
2966 | ||
3e04d765 AM |
2967 | /* Set if inline plt calls should be converted to direct calls. */ |
2968 | unsigned int can_convert_all_inline_plt:1; | |
2969 | ||
5d1634d7 | 2970 | /* Set on error. */ |
99877b66 | 2971 | unsigned int stub_error:1; |
721956f4 | 2972 | |
8c5b4e52 AM |
2973 | /* Whether func_desc_adjust needs to be run over symbols. */ |
2974 | unsigned int need_func_desc_adj:1; | |
721956f4 | 2975 | |
82e66161 AM |
2976 | /* Whether there exist local gnu indirect function resolvers, |
2977 | referenced by dynamic relocations. */ | |
2978 | unsigned int local_ifunc_resolver:1; | |
2979 | unsigned int maybe_local_ifunc_resolver:1; | |
2980 | ||
f378ab09 AM |
2981 | /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */ |
2982 | unsigned int has_plt_localentry0:1; | |
2983 | ||
721956f4 AM |
2984 | /* Incremented every time we size stubs. */ |
2985 | unsigned int stub_iteration; | |
5d1634d7 | 2986 | |
87d72d41 AM |
2987 | /* Small local sym cache. */ |
2988 | struct sym_cache sym_cache; | |
65f38f15 AM |
2989 | }; |
2990 | ||
4c52953f AM |
2991 | /* Rename some of the generic section flags to better document how they |
2992 | are used here. */ | |
b0dddeec AM |
2993 | |
2994 | /* Nonzero if this section has TLS related relocations. */ | |
2995 | #define has_tls_reloc sec_flg0 | |
2996 | ||
23cedd1d | 2997 | /* Nonzero if this section has an old-style call to __tls_get_addr. */ |
b0dddeec AM |
2998 | #define has_tls_get_addr_call sec_flg1 |
2999 | ||
3000 | /* Nonzero if this section has any toc or got relocs. */ | |
3001 | #define has_toc_reloc sec_flg2 | |
3002 | ||
3003 | /* Nonzero if this section has a call to another section that uses | |
3004 | the toc or got. */ | |
d77c8a4b | 3005 | #define makes_toc_func_call sec_flg3 |
b0dddeec AM |
3006 | |
3007 | /* Recursion protection when determining above flag. */ | |
d77c8a4b | 3008 | #define call_check_in_progress sec_flg4 |
70cc837d | 3009 | #define call_check_done sec_flg5 |
4c52953f | 3010 | |
65f38f15 AM |
3011 | /* Get the ppc64 ELF linker hash table from a link_info structure. */ |
3012 | ||
3013 | #define ppc_hash_table(p) \ | |
4dfe6ac6 NC |
3014 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
3015 | == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL) | |
65f38f15 | 3016 | |
721956f4 AM |
3017 | #define ppc_stub_hash_lookup(table, string, create, copy) \ |
3018 | ((struct ppc_stub_hash_entry *) \ | |
3019 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
3020 | ||
3021 | #define ppc_branch_hash_lookup(table, string, create, copy) \ | |
3022 | ((struct ppc_branch_hash_entry *) \ | |
3023 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
3024 | ||
3025 | /* Create an entry in the stub hash table. */ | |
3026 | ||
3027 | static struct bfd_hash_entry * | |
4ce794b7 AM |
3028 | stub_hash_newfunc (struct bfd_hash_entry *entry, |
3029 | struct bfd_hash_table *table, | |
3030 | const char *string) | |
721956f4 AM |
3031 | { |
3032 | /* Allocate the structure if it has not already been allocated by a | |
3033 | subclass. */ | |
3034 | if (entry == NULL) | |
3035 | { | |
3036 | entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry)); | |
3037 | if (entry == NULL) | |
3038 | return entry; | |
3039 | } | |
3040 | ||
3041 | /* Call the allocation method of the superclass. */ | |
3042 | entry = bfd_hash_newfunc (entry, table, string); | |
3043 | if (entry != NULL) | |
3044 | { | |
3045 | struct ppc_stub_hash_entry *eh; | |
3046 | ||
3047 | /* Initialize the local fields. */ | |
3048 | eh = (struct ppc_stub_hash_entry *) entry; | |
ad8e1ba5 | 3049 | eh->stub_type = ppc_stub_none; |
6f20ed8a | 3050 | eh->group = NULL; |
721956f4 AM |
3051 | eh->stub_offset = 0; |
3052 | eh->target_value = 0; | |
3053 | eh->target_section = NULL; | |
721956f4 | 3054 | eh->h = NULL; |
6911b7dc | 3055 | eh->plt_ent = NULL; |
6911b7dc | 3056 | eh->other = 0; |
721956f4 AM |
3057 | } |
3058 | ||
3059 | return entry; | |
3060 | } | |
3061 | ||
3062 | /* Create an entry in the branch hash table. */ | |
3063 | ||
3064 | static struct bfd_hash_entry * | |
4ce794b7 AM |
3065 | branch_hash_newfunc (struct bfd_hash_entry *entry, |
3066 | struct bfd_hash_table *table, | |
3067 | const char *string) | |
721956f4 AM |
3068 | { |
3069 | /* Allocate the structure if it has not already been allocated by a | |
3070 | subclass. */ | |
3071 | if (entry == NULL) | |
3072 | { | |
3073 | entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry)); | |
3074 | if (entry == NULL) | |
3075 | return entry; | |
3076 | } | |
3077 | ||
3078 | /* Call the allocation method of the superclass. */ | |
3079 | entry = bfd_hash_newfunc (entry, table, string); | |
3080 | if (entry != NULL) | |
3081 | { | |
3082 | struct ppc_branch_hash_entry *eh; | |
3083 | ||
3084 | /* Initialize the local fields. */ | |
3085 | eh = (struct ppc_branch_hash_entry *) entry; | |
3086 | eh->offset = 0; | |
3087 | eh->iter = 0; | |
3088 | } | |
3089 | ||
3090 | return entry; | |
3091 | } | |
3092 | ||
65f38f15 AM |
3093 | /* Create an entry in a ppc64 ELF linker hash table. */ |
3094 | ||
3095 | static struct bfd_hash_entry * | |
4ce794b7 AM |
3096 | link_hash_newfunc (struct bfd_hash_entry *entry, |
3097 | struct bfd_hash_table *table, | |
3098 | const char *string) | |
65f38f15 AM |
3099 | { |
3100 | /* Allocate the structure if it has not already been allocated by a | |
3101 | subclass. */ | |
3102 | if (entry == NULL) | |
3103 | { | |
3104 | entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry)); | |
3105 | if (entry == NULL) | |
3106 | return entry; | |
3107 | } | |
3108 | ||
3109 | /* Call the allocation method of the superclass. */ | |
3110 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
3111 | if (entry != NULL) | |
3112 | { | |
3113 | struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry; | |
3114 | ||
b3fac117 | 3115 | memset (&eh->u.stub_cache, 0, |
908b32fc | 3116 | (sizeof (struct ppc_link_hash_entry) |
b3fac117 AM |
3117 | - offsetof (struct ppc_link_hash_entry, u.stub_cache))); |
3118 | ||
3119 | /* When making function calls, old ABI code references function entry | |
3120 | points (dot symbols), while new ABI code references the function | |
3121 | descriptor symbol. We need to make any combination of reference and | |
3122 | definition work together, without breaking archive linking. | |
3123 | ||
3124 | For a defined function "foo" and an undefined call to "bar": | |
3125 | An old object defines "foo" and ".foo", references ".bar" (possibly | |
3126 | "bar" too). | |
3127 | A new object defines "foo" and references "bar". | |
3128 | ||
3129 | A new object thus has no problem with its undefined symbols being | |
3130 | satisfied by definitions in an old object. On the other hand, the | |
3131 | old object won't have ".bar" satisfied by a new object. | |
3132 | ||
3133 | Keep a list of newly added dot-symbols. */ | |
3134 | ||
3135 | if (string[0] == '.') | |
3136 | { | |
3137 | struct ppc_link_hash_table *htab; | |
3138 | ||
3139 | htab = (struct ppc_link_hash_table *) table; | |
3140 | eh->u.next_dot_sym = htab->dot_syms; | |
3141 | htab->dot_syms = eh; | |
3142 | } | |
65f38f15 AM |
3143 | } |
3144 | ||
3145 | return entry; | |
3146 | } | |
3147 | ||
2cdcc330 AM |
3148 | struct tocsave_entry |
3149 | { | |
3b421ab3 AM |
3150 | asection *sec; |
3151 | bfd_vma offset; | |
3152 | }; | |
3153 | ||
3154 | static hashval_t | |
3155 | tocsave_htab_hash (const void *p) | |
3156 | { | |
3157 | const struct tocsave_entry *e = (const struct tocsave_entry *) p; | |
4aef7643 | 3158 | return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3; |
3b421ab3 AM |
3159 | } |
3160 | ||
3161 | static int | |
3162 | tocsave_htab_eq (const void *p1, const void *p2) | |
3163 | { | |
3164 | const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1; | |
3165 | const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2; | |
3166 | return e1->sec == e2->sec && e1->offset == e2->offset; | |
3167 | } | |
3168 | ||
68faa637 AM |
3169 | /* Destroy a ppc64 ELF linker hash table. */ |
3170 | ||
3171 | static void | |
d495ab0d | 3172 | ppc64_elf_link_hash_table_free (bfd *obfd) |
68faa637 | 3173 | { |
d495ab0d | 3174 | struct ppc_link_hash_table *htab; |
68faa637 | 3175 | |
d495ab0d | 3176 | htab = (struct ppc_link_hash_table *) obfd->link.hash; |
68faa637 AM |
3177 | if (htab->tocsave_htab) |
3178 | htab_delete (htab->tocsave_htab); | |
d495ab0d AM |
3179 | bfd_hash_table_free (&htab->branch_hash_table); |
3180 | bfd_hash_table_free (&htab->stub_hash_table); | |
3181 | _bfd_elf_link_hash_table_free (obfd); | |
68faa637 AM |
3182 | } |
3183 | ||
65f38f15 AM |
3184 | /* Create a ppc64 ELF linker hash table. */ |
3185 | ||
3186 | static struct bfd_link_hash_table * | |
4ce794b7 | 3187 | ppc64_elf_link_hash_table_create (bfd *abfd) |
65f38f15 AM |
3188 | { |
3189 | struct ppc_link_hash_table *htab; | |
3190 | bfd_size_type amt = sizeof (struct ppc_link_hash_table); | |
3191 | ||
4ce794b7 | 3192 | htab = bfd_zmalloc (amt); |
65f38f15 AM |
3193 | if (htab == NULL) |
3194 | return NULL; | |
3195 | ||
66eb6687 | 3196 | if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc, |
4dfe6ac6 NC |
3197 | sizeof (struct ppc_link_hash_entry), |
3198 | PPC64_ELF_DATA)) | |
65f38f15 | 3199 | { |
e2d34d7d | 3200 | free (htab); |
65f38f15 AM |
3201 | return NULL; |
3202 | } | |
3203 | ||
721956f4 | 3204 | /* Init the stub hash table too. */ |
66eb6687 AM |
3205 | if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc, |
3206 | sizeof (struct ppc_stub_hash_entry))) | |
2915c55b | 3207 | { |
d495ab0d | 3208 | _bfd_elf_link_hash_table_free (abfd); |
2915c55b JK |
3209 | return NULL; |
3210 | } | |
721956f4 AM |
3211 | |
3212 | /* And the branch hash table. */ | |
66eb6687 AM |
3213 | if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc, |
3214 | sizeof (struct ppc_branch_hash_entry))) | |
2915c55b JK |
3215 | { |
3216 | bfd_hash_table_free (&htab->stub_hash_table); | |
d495ab0d | 3217 | _bfd_elf_link_hash_table_free (abfd); |
2915c55b JK |
3218 | return NULL; |
3219 | } | |
721956f4 | 3220 | |
3b421ab3 AM |
3221 | htab->tocsave_htab = htab_try_create (1024, |
3222 | tocsave_htab_hash, | |
3223 | tocsave_htab_eq, | |
3224 | NULL); | |
3225 | if (htab->tocsave_htab == NULL) | |
2915c55b | 3226 | { |
d495ab0d | 3227 | ppc64_elf_link_hash_table_free (abfd); |
2915c55b JK |
3228 | return NULL; |
3229 | } | |
d495ab0d | 3230 | htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free; |
3b421ab3 | 3231 | |
3254fd24 AM |
3232 | /* Initializing two fields of the union is just cosmetic. We really |
3233 | only care about glist, but when compiled on a 32-bit host the | |
3234 | bfd_vma fields are larger. Setting the bfd_vma to zero makes | |
3235 | debugger inspection of these fields look nicer. */ | |
a6aa5195 AM |
3236 | htab->elf.init_got_refcount.refcount = 0; |
3237 | htab->elf.init_got_refcount.glist = NULL; | |
3238 | htab->elf.init_plt_refcount.refcount = 0; | |
3239 | htab->elf.init_plt_refcount.glist = NULL; | |
3240 | htab->elf.init_got_offset.offset = 0; | |
3241 | htab->elf.init_got_offset.glist = NULL; | |
3242 | htab->elf.init_plt_offset.offset = 0; | |
3243 | htab->elf.init_plt_offset.glist = NULL; | |
3254fd24 | 3244 | |
65f38f15 AM |
3245 | return &htab->elf.root; |
3246 | } | |
3247 | ||
bfeb4a28 AM |
3248 | /* Create sections for linker generated code. */ |
3249 | ||
3250 | static bfd_boolean | |
3251 | create_linkage_sections (bfd *dynobj, struct bfd_link_info *info) | |
3252 | { | |
3253 | struct ppc_link_hash_table *htab; | |
3254 | flagword flags; | |
3255 | ||
3256 | htab = ppc_hash_table (info); | |
3257 | ||
bfeb4a28 AM |
3258 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY |
3259 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
b32547cd AM |
3260 | if (htab->params->save_restore_funcs) |
3261 | { | |
3262 | /* Create .sfpr for code to save and restore fp regs. */ | |
3263 | htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr", | |
3264 | flags); | |
3265 | if (htab->sfpr == NULL | |
2cdcc330 | 3266 | || !bfd_set_section_alignment (dynobj, htab->sfpr, 2)) |
b32547cd AM |
3267 | return FALSE; |
3268 | } | |
3269 | ||
3270 | if (bfd_link_relocatable (info)) | |
3271 | return TRUE; | |
bfeb4a28 AM |
3272 | |
3273 | /* Create .glink for lazy dynamic linking support. */ | |
3274 | htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink", | |
3275 | flags); | |
3276 | if (htab->glink == NULL | |
2cdcc330 | 3277 | || !bfd_set_section_alignment (dynobj, htab->glink, 3)) |
bfeb4a28 AM |
3278 | return FALSE; |
3279 | ||
9e390558 AM |
3280 | /* The part of .glink used by global entry stubs, separate so that |
3281 | it can be aligned appropriately without affecting htab->glink. */ | |
3282 | htab->global_entry = bfd_make_section_anyway_with_flags (dynobj, ".glink", | |
3283 | flags); | |
3284 | if (htab->global_entry == NULL | |
2cdcc330 | 3285 | || !bfd_set_section_alignment (dynobj, htab->global_entry, 2)) |
9e390558 AM |
3286 | return FALSE; |
3287 | ||
bfeb4a28 AM |
3288 | if (!info->no_ld_generated_unwind_info) |
3289 | { | |
3290 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS | |
3291 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
3292 | htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj, | |
3293 | ".eh_frame", | |
3294 | flags); | |
3295 | if (htab->glink_eh_frame == NULL | |
3296 | || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2)) | |
3297 | return FALSE; | |
3298 | } | |
3299 | ||
3300 | flags = SEC_ALLOC | SEC_LINKER_CREATED; | |
33e44f2e AM |
3301 | htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags); |
3302 | if (htab->elf.iplt == NULL | |
2cdcc330 | 3303 | || !bfd_set_section_alignment (dynobj, htab->elf.iplt, 3)) |
bfeb4a28 AM |
3304 | return FALSE; |
3305 | ||
3306 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
3307 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
33e44f2e AM |
3308 | htab->elf.irelplt |
3309 | = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags); | |
3310 | if (htab->elf.irelplt == NULL | |
2cdcc330 | 3311 | || !bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3)) |
bfeb4a28 AM |
3312 | return FALSE; |
3313 | ||
3314 | /* Create branch lookup table for plt_branch stubs. */ | |
3315 | flags = (SEC_ALLOC | SEC_LOAD | |
3316 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
3317 | htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt", | |
3318 | flags); | |
3319 | if (htab->brlt == NULL | |
2cdcc330 | 3320 | || !bfd_set_section_alignment (dynobj, htab->brlt, 3)) |
bfeb4a28 AM |
3321 | return FALSE; |
3322 | ||
2d7ad24e AM |
3323 | /* Local plt entries, put in .branch_lt but a separate section for |
3324 | convenience. */ | |
3325 | htab->pltlocal = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt", | |
3326 | flags); | |
3327 | if (htab->pltlocal == NULL | |
2cdcc330 | 3328 | || !bfd_set_section_alignment (dynobj, htab->pltlocal, 3)) |
2d7ad24e AM |
3329 | return FALSE; |
3330 | ||
0e1862bb | 3331 | if (!bfd_link_pic (info)) |
bfeb4a28 AM |
3332 | return TRUE; |
3333 | ||
3334 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
3335 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2d7ad24e AM |
3336 | htab->relbrlt |
3337 | = bfd_make_section_anyway_with_flags (dynobj, ".rela.branch_lt", flags); | |
bfeb4a28 | 3338 | if (htab->relbrlt == NULL |
2cdcc330 | 3339 | || !bfd_set_section_alignment (dynobj, htab->relbrlt, 3)) |
bfeb4a28 AM |
3340 | return FALSE; |
3341 | ||
2d7ad24e AM |
3342 | htab->relpltlocal |
3343 | = bfd_make_section_anyway_with_flags (dynobj, ".rela.branch_lt", flags); | |
3344 | if (htab->relpltlocal == NULL | |
2cdcc330 | 3345 | || !bfd_set_section_alignment (dynobj, htab->relpltlocal, 3)) |
2d7ad24e AM |
3346 | return FALSE; |
3347 | ||
bfeb4a28 AM |
3348 | return TRUE; |
3349 | } | |
3350 | ||
e717da7e AM |
3351 | /* Satisfy the ELF linker by filling in some fields in our fake bfd. */ |
3352 | ||
bfeb4a28 | 3353 | bfd_boolean |
e7d1c40c AM |
3354 | ppc64_elf_init_stub_bfd (struct bfd_link_info *info, |
3355 | struct ppc64_elf_params *params) | |
e717da7e AM |
3356 | { |
3357 | struct ppc_link_hash_table *htab; | |
3358 | ||
e7d1c40c | 3359 | elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64; |
e717da7e AM |
3360 | |
3361 | /* Always hook our dynamic sections into the first bfd, which is the | |
3362 | linker created stub bfd. This ensures that the GOT header is at | |
3363 | the start of the output TOC section. */ | |
3364 | htab = ppc_hash_table (info); | |
e7d1c40c AM |
3365 | htab->elf.dynobj = params->stub_bfd; |
3366 | htab->params = params; | |
bfeb4a28 | 3367 | |
bfeb4a28 | 3368 | return create_linkage_sections (htab->elf.dynobj, info); |
e717da7e AM |
3369 | } |
3370 | ||
721956f4 AM |
3371 | /* Build a name for an entry in the stub hash table. */ |
3372 | ||
3373 | static char * | |
4ce794b7 AM |
3374 | ppc_stub_name (const asection *input_section, |
3375 | const asection *sym_sec, | |
3376 | const struct ppc_link_hash_entry *h, | |
3377 | const Elf_Internal_Rela *rel) | |
721956f4 AM |
3378 | { |
3379 | char *stub_name; | |
bcaa2f82 | 3380 | ssize_t len; |
721956f4 AM |
3381 | |
3382 | /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31 | |
3383 | offsets from a sym as a branch target? In fact, we could | |
3384 | probably assume the addend is always zero. */ | |
3385 | BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend); | |
3386 | ||
3387 | if (h) | |
3388 | { | |
3389 | len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1; | |
3390 | stub_name = bfd_malloc (len); | |
46de2a7c AM |
3391 | if (stub_name == NULL) |
3392 | return stub_name; | |
3393 | ||
bcaa2f82 AM |
3394 | len = sprintf (stub_name, "%08x.%s+%x", |
3395 | input_section->id & 0xffffffff, | |
3396 | h->elf.root.root.string, | |
3397 | (int) rel->r_addend & 0xffffffff); | |
721956f4 AM |
3398 | } |
3399 | else | |
3400 | { | |
ad8e1ba5 | 3401 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; |
721956f4 | 3402 | stub_name = bfd_malloc (len); |
46de2a7c AM |
3403 | if (stub_name == NULL) |
3404 | return stub_name; | |
3405 | ||
bcaa2f82 AM |
3406 | len = sprintf (stub_name, "%08x.%x:%x+%x", |
3407 | input_section->id & 0xffffffff, | |
3408 | sym_sec->id & 0xffffffff, | |
3409 | (int) ELF64_R_SYM (rel->r_info) & 0xffffffff, | |
3410 | (int) rel->r_addend & 0xffffffff); | |
721956f4 | 3411 | } |
bcaa2f82 | 3412 | if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0') |
ee75fd95 | 3413 | stub_name[len - 2] = 0; |
721956f4 AM |
3414 | return stub_name; |
3415 | } | |
3416 | ||
3417 | /* Look up an entry in the stub hash. Stub entries are cached because | |
3418 | creating the stub name takes a bit of time. */ | |
3419 | ||
3420 | static struct ppc_stub_hash_entry * | |
4ce794b7 AM |
3421 | ppc_get_stub_entry (const asection *input_section, |
3422 | const asection *sym_sec, | |
039b3fef | 3423 | struct ppc_link_hash_entry *h, |
4ce794b7 AM |
3424 | const Elf_Internal_Rela *rel, |
3425 | struct ppc_link_hash_table *htab) | |
721956f4 AM |
3426 | { |
3427 | struct ppc_stub_hash_entry *stub_entry; | |
6f20ed8a | 3428 | struct map_stub *group; |
721956f4 AM |
3429 | |
3430 | /* If this input section is part of a group of sections sharing one | |
3431 | stub section, then use the id of the first section in the group. | |
3432 | Stub names need to include a section id, as there may well be | |
3433 | more than one stub used to reach say, printf, and we need to | |
3434 | distinguish between them. */ | |
6f20ed8a | 3435 | group = htab->sec_info[input_section->id].u.group; |
89d77b8a AM |
3436 | if (group == NULL) |
3437 | return NULL; | |
721956f4 | 3438 | |
b3fac117 AM |
3439 | if (h != NULL && h->u.stub_cache != NULL |
3440 | && h->u.stub_cache->h == h | |
6f20ed8a | 3441 | && h->u.stub_cache->group == group) |
721956f4 | 3442 | { |
b3fac117 | 3443 | stub_entry = h->u.stub_cache; |
721956f4 AM |
3444 | } |
3445 | else | |
3446 | { | |
3447 | char *stub_name; | |
3448 | ||
6f20ed8a | 3449 | stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel); |
721956f4 AM |
3450 | if (stub_name == NULL) |
3451 | return NULL; | |
3452 | ||
3453 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, | |
b34976b6 | 3454 | stub_name, FALSE, FALSE); |
721956f4 | 3455 | if (h != NULL) |
b3fac117 | 3456 | h->u.stub_cache = stub_entry; |
721956f4 AM |
3457 | |
3458 | free (stub_name); | |
3459 | } | |
3460 | ||
3461 | return stub_entry; | |
3462 | } | |
3463 | ||
3464 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
3465 | stub entry are initialised. */ | |
3466 | ||
3467 | static struct ppc_stub_hash_entry * | |
4ce794b7 AM |
3468 | ppc_add_stub (const char *stub_name, |
3469 | asection *section, | |
25f53a85 | 3470 | struct bfd_link_info *info) |
721956f4 | 3471 | { |
25f53a85 | 3472 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
6f20ed8a | 3473 | struct map_stub *group; |
721956f4 AM |
3474 | asection *link_sec; |
3475 | asection *stub_sec; | |
3476 | struct ppc_stub_hash_entry *stub_entry; | |
3477 | ||
6f20ed8a AM |
3478 | group = htab->sec_info[section->id].u.group; |
3479 | link_sec = group->link_sec; | |
3480 | stub_sec = group->stub_sec; | |
721956f4 AM |
3481 | if (stub_sec == NULL) |
3482 | { | |
6f20ed8a AM |
3483 | size_t namelen; |
3484 | bfd_size_type len; | |
3485 | char *s_name; | |
721956f4 | 3486 | |
6f20ed8a AM |
3487 | namelen = strlen (link_sec->name); |
3488 | len = namelen + sizeof (STUB_SUFFIX); | |
3489 | s_name = bfd_alloc (htab->params->stub_bfd, len); | |
3490 | if (s_name == NULL) | |
3491 | return NULL; | |
721956f4 | 3492 | |
6f20ed8a AM |
3493 | memcpy (s_name, link_sec->name, namelen); |
3494 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); | |
3495 | stub_sec = (*htab->params->add_stub_section) (s_name, link_sec); | |
3496 | if (stub_sec == NULL) | |
3497 | return NULL; | |
3498 | group->stub_sec = stub_sec; | |
721956f4 AM |
3499 | } |
3500 | ||
3501 | /* Enter this entry into the linker stub hash table. */ | |
3502 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name, | |
b34976b6 | 3503 | TRUE, FALSE); |
721956f4 AM |
3504 | if (stub_entry == NULL) |
3505 | { | |
695344c0 | 3506 | /* xgettext:c-format */ |
cf97bcb0 AM |
3507 | _bfd_error_handler (_("%pB: cannot create stub entry %s"), |
3508 | section->owner, stub_name); | |
721956f4 AM |
3509 | return NULL; |
3510 | } | |
3511 | ||
6f20ed8a | 3512 | stub_entry->group = group; |
721956f4 | 3513 | stub_entry->stub_offset = 0; |
721956f4 AM |
3514 | return stub_entry; |
3515 | } | |
3516 | ||
e717da7e AM |
3517 | /* Create .got and .rela.got sections in ABFD, and .got in dynobj if |
3518 | not already done. */ | |
65f38f15 | 3519 | |
b34976b6 | 3520 | static bfd_boolean |
e717da7e | 3521 | create_got_section (bfd *abfd, struct bfd_link_info *info) |
65f38f15 | 3522 | { |
e717da7e AM |
3523 | asection *got, *relgot; |
3524 | flagword flags; | |
3525 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
65f38f15 | 3526 | |
0c8d6e5c | 3527 | if (!is_ppc64_elf (abfd)) |
0ffa91dd | 3528 | return FALSE; |
4dfe6ac6 NC |
3529 | if (htab == NULL) |
3530 | return FALSE; | |
0ffa91dd | 3531 | |
33e44f2e AM |
3532 | if (!htab->elf.sgot |
3533 | && !_bfd_elf_create_got_section (htab->elf.dynobj, info)) | |
3534 | return FALSE; | |
e717da7e AM |
3535 | |
3536 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
3537 | | SEC_LINKER_CREATED); | |
3538 | ||
c456f082 | 3539 | got = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
e717da7e | 3540 | if (!got |
e717da7e AM |
3541 | || !bfd_set_section_alignment (abfd, got, 3)) |
3542 | return FALSE; | |
65f38f15 | 3543 | |
c456f082 AM |
3544 | relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got", |
3545 | flags | SEC_READONLY); | |
e717da7e | 3546 | if (!relgot |
2cdcc330 | 3547 | || !bfd_set_section_alignment (abfd, relgot, 3)) |
b34976b6 | 3548 | return FALSE; |
e717da7e AM |
3549 | |
3550 | ppc64_elf_tdata (abfd)->got = got; | |
3551 | ppc64_elf_tdata (abfd)->relgot = relgot; | |
b34976b6 | 3552 | return TRUE; |
65f38f15 | 3553 | } |
5bd4f169 | 3554 | |
b31867b6 AM |
3555 | /* Follow indirect and warning symbol links. */ |
3556 | ||
3557 | static inline struct bfd_link_hash_entry * | |
3558 | follow_link (struct bfd_link_hash_entry *h) | |
3559 | { | |
3560 | while (h->type == bfd_link_hash_indirect | |
3561 | || h->type == bfd_link_hash_warning) | |
3562 | h = h->u.i.link; | |
3563 | return h; | |
3564 | } | |
3565 | ||
3566 | static inline struct elf_link_hash_entry * | |
3567 | elf_follow_link (struct elf_link_hash_entry *h) | |
3568 | { | |
3569 | return (struct elf_link_hash_entry *) follow_link (&h->root); | |
3570 | } | |
3571 | ||
3572 | static inline struct ppc_link_hash_entry * | |
3573 | ppc_follow_link (struct ppc_link_hash_entry *h) | |
3574 | { | |
3575 | return (struct ppc_link_hash_entry *) follow_link (&h->elf.root); | |
3576 | } | |
3577 | ||
40d16e0b AM |
3578 | /* Merge PLT info on FROM with that on TO. */ |
3579 | ||
3580 | static void | |
3581 | move_plt_plist (struct ppc_link_hash_entry *from, | |
3582 | struct ppc_link_hash_entry *to) | |
3583 | { | |
3584 | if (from->elf.plt.plist != NULL) | |
3585 | { | |
3586 | if (to->elf.plt.plist != NULL) | |
3587 | { | |
3588 | struct plt_entry **entp; | |
3589 | struct plt_entry *ent; | |
3590 | ||
3591 | for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; ) | |
3592 | { | |
3593 | struct plt_entry *dent; | |
3594 | ||
3595 | for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next) | |
3596 | if (dent->addend == ent->addend) | |
3597 | { | |
3598 | dent->plt.refcount += ent->plt.refcount; | |
3599 | *entp = ent->next; | |
3600 | break; | |
3601 | } | |
3602 | if (dent == NULL) | |
3603 | entp = &ent->next; | |
3604 | } | |
3605 | *entp = to->elf.plt.plist; | |
3606 | } | |
3607 | ||
3608 | to->elf.plt.plist = from->elf.plt.plist; | |
3609 | from->elf.plt.plist = NULL; | |
3610 | } | |
3611 | } | |
3612 | ||
65f38f15 AM |
3613 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
3614 | ||
3615 | static void | |
fcfa13d2 AM |
3616 | ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info, |
3617 | struct elf_link_hash_entry *dir, | |
3618 | struct elf_link_hash_entry *ind) | |
65f38f15 AM |
3619 | { |
3620 | struct ppc_link_hash_entry *edir, *eind; | |
3621 | ||
3622 | edir = (struct ppc_link_hash_entry *) dir; | |
3623 | eind = (struct ppc_link_hash_entry *) ind; | |
3624 | ||
c79d6685 AM |
3625 | edir->is_func |= eind->is_func; |
3626 | edir->is_func_descriptor |= eind->is_func_descriptor; | |
3627 | edir->tls_mask |= eind->tls_mask; | |
3628 | if (eind->oh != NULL) | |
3629 | edir->oh = ppc_follow_link (eind->oh); | |
3630 | ||
474436e6 | 3631 | if (edir->elf.versioned != versioned_hidden) |
e81830c5 AM |
3632 | edir->elf.ref_dynamic |= eind->elf.ref_dynamic; |
3633 | edir->elf.ref_regular |= eind->elf.ref_regular; | |
3634 | edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; | |
4a7e5234 | 3635 | edir->elf.non_got_ref |= eind->elf.non_got_ref; |
e81830c5 AM |
3636 | edir->elf.needs_plt |= eind->elf.needs_plt; |
3637 | edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; | |
c79d6685 | 3638 | |
d311bc8b AM |
3639 | /* If we were called to copy over info for a weak sym, don't copy |
3640 | dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs | |
3641 | in order to simplify readonly_dynrelocs and save a field in the | |
3642 | symbol hash entry, but that means dyn_relocs can't be used in any | |
3643 | tests about a specific symbol, or affect other symbol flags which | |
ab2477e1 | 3644 | are then tested. */ |
d311bc8b | 3645 | if (eind->elf.root.type != bfd_link_hash_indirect) |
ab2477e1 | 3646 | return; |
d311bc8b | 3647 | |
411e1bfb | 3648 | /* Copy over any dynamic relocs we may have on the indirect sym. */ |
bbd7ec4a | 3649 | if (eind->dyn_relocs != NULL) |
65f38f15 | 3650 | { |
bbd7ec4a AM |
3651 | if (edir->dyn_relocs != NULL) |
3652 | { | |
6061a67d AM |
3653 | struct elf_dyn_relocs **pp; |
3654 | struct elf_dyn_relocs *p; | |
bbd7ec4a | 3655 | |
fcfa13d2 | 3656 | /* Add reloc counts against the indirect sym to the direct sym |
bbd7ec4a AM |
3657 | list. Merge any entries against the same section. */ |
3658 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
3659 | { | |
6061a67d | 3660 | struct elf_dyn_relocs *q; |
bbd7ec4a AM |
3661 | |
3662 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
3663 | if (q->sec == p->sec) | |
3664 | { | |
3665 | q->pc_count += p->pc_count; | |
3666 | q->count += p->count; | |
3667 | *pp = p->next; | |
3668 | break; | |
3669 | } | |
3670 | if (q == NULL) | |
3671 | pp = &p->next; | |
3672 | } | |
3673 | *pp = edir->dyn_relocs; | |
3674 | } | |
3675 | ||
65f38f15 AM |
3676 | edir->dyn_relocs = eind->dyn_relocs; |
3677 | eind->dyn_relocs = NULL; | |
3678 | } | |
65f38f15 | 3679 | |
81848ca0 AM |
3680 | /* Copy over got entries that we may have already seen to the |
3681 | symbol which just became indirect. */ | |
411e1bfb AM |
3682 | if (eind->elf.got.glist != NULL) |
3683 | { | |
3684 | if (edir->elf.got.glist != NULL) | |
3685 | { | |
3686 | struct got_entry **entp; | |
3687 | struct got_entry *ent; | |
3688 | ||
3689 | for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; ) | |
3690 | { | |
3691 | struct got_entry *dent; | |
3692 | ||
3693 | for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next) | |
3694 | if (dent->addend == ent->addend | |
e717da7e | 3695 | && dent->owner == ent->owner |
411e1bfb AM |
3696 | && dent->tls_type == ent->tls_type) |
3697 | { | |
3698 | dent->got.refcount += ent->got.refcount; | |
3699 | *entp = ent->next; | |
3700 | break; | |
3701 | } | |
3702 | if (dent == NULL) | |
3703 | entp = &ent->next; | |
3704 | } | |
3705 | *entp = edir->elf.got.glist; | |
3706 | } | |
3707 | ||
3708 | edir->elf.got.glist = eind->elf.got.glist; | |
3709 | eind->elf.got.glist = NULL; | |
3710 | } | |
3711 | ||
3712 | /* And plt entries. */ | |
40d16e0b | 3713 | move_plt_plist (eind, edir); |
411e1bfb | 3714 | |
fcfa13d2 | 3715 | if (eind->elf.dynindx != -1) |
411e1bfb | 3716 | { |
fcfa13d2 AM |
3717 | if (edir->elf.dynindx != -1) |
3718 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
3719 | edir->elf.dynstr_index); | |
411e1bfb AM |
3720 | edir->elf.dynindx = eind->elf.dynindx; |
3721 | edir->elf.dynstr_index = eind->elf.dynstr_index; | |
3722 | eind->elf.dynindx = -1; | |
3723 | eind->elf.dynstr_index = 0; | |
3724 | } | |
411e1bfb AM |
3725 | } |
3726 | ||
8387904d AM |
3727 | /* Find the function descriptor hash entry from the given function code |
3728 | hash entry FH. Link the entries via their OH fields. */ | |
3729 | ||
3730 | static struct ppc_link_hash_entry * | |
b31867b6 | 3731 | lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab) |
8387904d AM |
3732 | { |
3733 | struct ppc_link_hash_entry *fdh = fh->oh; | |
3734 | ||
3735 | if (fdh == NULL) | |
3736 | { | |
3737 | const char *fd_name = fh->elf.root.root.string + 1; | |
3738 | ||
3739 | fdh = (struct ppc_link_hash_entry *) | |
3740 | elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE); | |
b31867b6 AM |
3741 | if (fdh == NULL) |
3742 | return fdh; | |
3743 | ||
3744 | fdh->is_func_descriptor = 1; | |
3745 | fdh->oh = fh; | |
3746 | fh->is_func = 1; | |
3747 | fh->oh = fdh; | |
8387904d AM |
3748 | } |
3749 | ||
8c5b4e52 AM |
3750 | fdh = ppc_follow_link (fdh); |
3751 | fdh->is_func_descriptor = 1; | |
3752 | fdh->oh = fh; | |
3753 | return fdh; | |
8387904d AM |
3754 | } |
3755 | ||
8c5b4e52 | 3756 | /* Make a fake function descriptor sym for the undefined code sym FH. */ |
bb700d78 AM |
3757 | |
3758 | static struct ppc_link_hash_entry * | |
3759 | make_fdh (struct bfd_link_info *info, | |
908b32fc | 3760 | struct ppc_link_hash_entry *fh) |
bb700d78 | 3761 | { |
8c5b4e52 AM |
3762 | bfd *abfd = fh->elf.root.u.undef.abfd; |
3763 | struct bfd_link_hash_entry *bh = NULL; | |
bb700d78 | 3764 | struct ppc_link_hash_entry *fdh; |
8c5b4e52 AM |
3765 | flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak |
3766 | ? BSF_WEAK | |
3767 | : BSF_GLOBAL); | |
3768 | ||
3769 | if (!_bfd_generic_link_add_one_symbol (info, abfd, | |
3770 | fh->elf.root.root.string + 1, | |
3771 | flags, bfd_und_section_ptr, 0, | |
3772 | NULL, FALSE, FALSE, &bh)) | |
bb700d78 AM |
3773 | return NULL; |
3774 | ||
3775 | fdh = (struct ppc_link_hash_entry *) bh; | |
3776 | fdh->elf.non_elf = 0; | |
908b32fc AM |
3777 | fdh->fake = 1; |
3778 | fdh->is_func_descriptor = 1; | |
3779 | fdh->oh = fh; | |
3780 | fh->is_func = 1; | |
3781 | fh->oh = fdh; | |
bb700d78 AM |
3782 | return fdh; |
3783 | } | |
3784 | ||
8387904d AM |
3785 | /* Fix function descriptor symbols defined in .opd sections to be |
3786 | function type. */ | |
555cd476 AM |
3787 | |
3788 | static bfd_boolean | |
c16153ae | 3789 | ppc64_elf_add_symbol_hook (bfd *ibfd, |
e054468f | 3790 | struct bfd_link_info *info, |
555cd476 | 3791 | Elf_Internal_Sym *isym, |
6911b7dc | 3792 | const char **name, |
555cd476 AM |
3793 | flagword *flags ATTRIBUTE_UNUSED, |
3794 | asection **sec, | |
b53dfeb2 | 3795 | bfd_vma *value) |
555cd476 | 3796 | { |
b53dfeb2 | 3797 | if (*sec != NULL |
f1885d1e | 3798 | && strcmp ((*sec)->name, ".opd") == 0) |
b53dfeb2 AM |
3799 | { |
3800 | asection *code_sec; | |
3801 | ||
3802 | if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC | |
3803 | || ELF_ST_TYPE (isym->st_info) == STT_FUNC)) | |
3804 | isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC); | |
3805 | ||
3806 | /* If the symbol is a function defined in .opd, and the function | |
3807 | code is in a discarded group, let it appear to be undefined. */ | |
0e1862bb | 3808 | if (!bfd_link_relocatable (info) |
b53dfeb2 AM |
3809 | && (*sec)->reloc_count != 0 |
3810 | && opd_entry_value (*sec, *value, &code_sec, NULL, | |
3811 | FALSE) != (bfd_vma) -1 | |
3812 | && discarded_section (code_sec)) | |
3813 | { | |
3814 | *sec = bfd_und_section_ptr; | |
3815 | isym->st_shndx = SHN_UNDEF; | |
3816 | } | |
3817 | } | |
dbd1e97e AM |
3818 | else if (*sec != NULL |
3819 | && strcmp ((*sec)->name, ".toc") == 0 | |
3820 | && ELF_ST_TYPE (isym->st_info) == STT_OBJECT) | |
3821 | { | |
3822 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
3823 | if (htab != NULL) | |
3824 | htab->params->object_in_toc = 1; | |
3825 | } | |
433817dd | 3826 | |
6911b7dc AM |
3827 | if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0) |
3828 | { | |
3829 | if (abiversion (ibfd) == 0) | |
3830 | set_abiversion (ibfd, 2); | |
3831 | else if (abiversion (ibfd) == 1) | |
3832 | { | |
cf97bcb0 AM |
3833 | _bfd_error_handler (_("symbol '%s' has invalid st_other" |
3834 | " for ABI version 1"), *name); | |
6911b7dc AM |
3835 | bfd_set_error (bfd_error_bad_value); |
3836 | return FALSE; | |
3837 | } | |
3838 | } | |
3839 | ||
555cd476 AM |
3840 | return TRUE; |
3841 | } | |
3842 | ||
6911b7dc AM |
3843 | /* Merge non-visibility st_other attributes: local entry point. */ |
3844 | ||
3845 | static void | |
3846 | ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h, | |
3847 | const Elf_Internal_Sym *isym, | |
3848 | bfd_boolean definition, | |
3849 | bfd_boolean dynamic) | |
3850 | { | |
f378ab09 | 3851 | if (definition && (!dynamic || !h->def_regular)) |
6911b7dc AM |
3852 | h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1)) |
3853 | | ELF_ST_VISIBILITY (h->other)); | |
3854 | } | |
3855 | ||
8c5b4e52 AM |
3856 | /* Hook called on merging a symbol. We use this to clear "fake" since |
3857 | we now have a real symbol. */ | |
3858 | ||
3859 | static bfd_boolean | |
3860 | ppc64_elf_merge_symbol (struct elf_link_hash_entry *h, | |
8b5f1ed8 | 3861 | const Elf_Internal_Sym *isym, |
8c5b4e52 AM |
3862 | asection **psec ATTRIBUTE_UNUSED, |
3863 | bfd_boolean newdef ATTRIBUTE_UNUSED, | |
3864 | bfd_boolean olddef ATTRIBUTE_UNUSED, | |
3865 | bfd *oldbfd ATTRIBUTE_UNUSED, | |
3866 | const asection *oldsec ATTRIBUTE_UNUSED) | |
3867 | { | |
3868 | ((struct ppc_link_hash_entry *) h)->fake = 0; | |
8b5f1ed8 AM |
3869 | if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0) |
3870 | ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1; | |
8c5b4e52 AM |
3871 | return TRUE; |
3872 | } | |
3873 | ||
8387904d | 3874 | /* This function makes an old ABI object reference to ".bar" cause the |
908b32fc AM |
3875 | inclusion of a new ABI object archive that defines "bar". |
3876 | NAME is a symbol defined in an archive. Return a symbol in the hash | |
3877 | table that might be satisfied by the archive symbols. */ | |
8387904d AM |
3878 | |
3879 | static struct elf_link_hash_entry * | |
3880 | ppc64_elf_archive_symbol_lookup (bfd *abfd, | |
3881 | struct bfd_link_info *info, | |
3882 | const char *name) | |
3883 | { | |
3884 | struct elf_link_hash_entry *h; | |
3885 | char *dot_name; | |
3886 | size_t len; | |
3887 | ||
3888 | h = _bfd_elf_archive_symbol_lookup (abfd, info, name); | |
908b32fc AM |
3889 | if (h != NULL |
3890 | /* Don't return this sym if it is a fake function descriptor | |
3891 | created by add_symbol_adjust. */ | |
8c5b4e52 | 3892 | && !((struct ppc_link_hash_entry *) h)->fake) |
8387904d AM |
3893 | return h; |
3894 | ||
3895 | if (name[0] == '.') | |
3896 | return h; | |
3897 | ||
3898 | len = strlen (name); | |
3899 | dot_name = bfd_alloc (abfd, len + 2); | |
3900 | if (dot_name == NULL) | |
e99955cd | 3901 | return (struct elf_link_hash_entry *) -1; |
8387904d AM |
3902 | dot_name[0] = '.'; |
3903 | memcpy (dot_name + 1, name, len + 1); | |
3904 | h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name); | |
3905 | bfd_release (abfd, dot_name); | |
3906 | return h; | |
3907 | } | |
3908 | ||
3909 | /* This function satisfies all old ABI object references to ".bar" if a | |
99877b66 AM |
3910 | new ABI object defines "bar". Well, at least, undefined dot symbols |
3911 | are made weak. This stops later archive searches from including an | |
3912 | object if we already have a function descriptor definition. It also | |
35b0ce59 AM |
3913 | prevents the linker complaining about undefined symbols. |
3914 | We also check and correct mismatched symbol visibility here. The | |
3915 | most restrictive visibility of the function descriptor and the | |
3916 | function entry symbol is used. */ | |
8387904d AM |
3917 | |
3918 | static bfd_boolean | |
b3fac117 | 3919 | add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info) |
8387904d | 3920 | { |
8387904d AM |
3921 | struct ppc_link_hash_table *htab; |
3922 | struct ppc_link_hash_entry *fdh; | |
3923 | ||
b3fac117 AM |
3924 | if (eh->elf.root.type == bfd_link_hash_warning) |
3925 | eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link; | |
8387904d | 3926 | |
8400d40d AM |
3927 | if (eh->elf.root.type == bfd_link_hash_indirect) |
3928 | return TRUE; | |
3929 | ||
b3fac117 AM |
3930 | if (eh->elf.root.root.string[0] != '.') |
3931 | abort (); | |
8387904d | 3932 | |
b3fac117 | 3933 | htab = ppc_hash_table (info); |
4dfe6ac6 NC |
3934 | if (htab == NULL) |
3935 | return FALSE; | |
3936 | ||
b31867b6 | 3937 | fdh = lookup_fdh (eh, htab); |
8c5b4e52 AM |
3938 | if (fdh == NULL |
3939 | && !bfd_link_relocatable (info) | |
3940 | && (eh->elf.root.type == bfd_link_hash_undefined | |
3941 | || eh->elf.root.type == bfd_link_hash_undefweak) | |
3942 | && eh->elf.ref_regular) | |
3943 | { | |
3944 | /* Make an undefined function descriptor sym, in order to | |
3945 | pull in an --as-needed shared lib. Archives are handled | |
3946 | elsewhere. */ | |
3947 | fdh = make_fdh (info, eh); | |
3948 | if (fdh == NULL) | |
3949 | return FALSE; | |
bb700d78 | 3950 | } |
8c5b4e52 AM |
3951 | |
3952 | if (fdh != NULL) | |
8387904d | 3953 | { |
35b0ce59 AM |
3954 | unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1; |
3955 | unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1; | |
8c5b4e52 AM |
3956 | |
3957 | /* Make both descriptor and entry symbol have the most | |
3958 | constraining visibility of either symbol. */ | |
35b0ce59 AM |
3959 | if (entry_vis < descr_vis) |
3960 | fdh->elf.other += entry_vis - descr_vis; | |
3961 | else if (entry_vis > descr_vis) | |
3962 | eh->elf.other += descr_vis - entry_vis; | |
3963 | ||
8c5b4e52 AM |
3964 | /* Propagate reference flags from entry symbol to function |
3965 | descriptor symbol. */ | |
bc4e12de | 3966 | fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular; |
4070765b | 3967 | fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic; |
8c5b4e52 AM |
3968 | fdh->elf.ref_regular |= eh->elf.ref_regular; |
3969 | fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak; | |
3970 | ||
3971 | if (!fdh->elf.forced_local | |
3972 | && fdh->elf.dynindx == -1 | |
3973 | && fdh->elf.versioned != versioned_hidden | |
3974 | && (bfd_link_dll (info) | |
3975 | || fdh->elf.def_dynamic | |
3976 | || fdh->elf.ref_dynamic) | |
3977 | && (eh->elf.ref_regular | |
3978 | || eh->elf.def_regular)) | |
3979 | { | |
2cdcc330 | 3980 | if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf)) |
8c5b4e52 | 3981 | return FALSE; |
35b0ce59 | 3982 | } |
8387904d | 3983 | } |
99877b66 | 3984 | |
8387904d AM |
3985 | return TRUE; |
3986 | } | |
3987 | ||
f6c7c3e8 AM |
3988 | /* Set up opd section info and abiversion for IBFD, and process list |
3989 | of dot-symbols we made in link_hash_newfunc. */ | |
b3fac117 | 3990 | |
8387904d | 3991 | static bfd_boolean |
f6c7c3e8 | 3992 | ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info) |
8387904d | 3993 | { |
99877b66 | 3994 | struct ppc_link_hash_table *htab; |
b3fac117 | 3995 | struct ppc_link_hash_entry **p, *eh; |
459609d6 | 3996 | asection *opd = bfd_get_section_by_name (ibfd, ".opd"); |
433817dd | 3997 | |
459609d6 | 3998 | if (opd != NULL && opd->size != 0) |
b3fac117 | 3999 | { |
b9399fcf AM |
4000 | BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal); |
4001 | ppc64_elf_section_data (opd)->sec_type = sec_opd; | |
4002 | ||
459609d6 AM |
4003 | if (abiversion (ibfd) == 0) |
4004 | set_abiversion (ibfd, 1); | |
8a2058b5 | 4005 | else if (abiversion (ibfd) >= 2) |
f6c7c3e8 | 4006 | { |
695344c0 | 4007 | /* xgettext:c-format */ |
cf97bcb0 AM |
4008 | _bfd_error_handler (_("%pB .opd not allowed in ABI version %d"), |
4009 | ibfd, abiversion (ibfd)); | |
459609d6 AM |
4010 | bfd_set_error (bfd_error_bad_value); |
4011 | return FALSE; | |
f6c7c3e8 | 4012 | } |
b9399fcf | 4013 | } |
f6c7c3e8 | 4014 | |
b9399fcf AM |
4015 | if (is_ppc64_elf (info->output_bfd)) |
4016 | { | |
4017 | /* For input files without an explicit abiversion in e_flags | |
4018 | we should have flagged any with symbol st_other bits set | |
4019 | as ELFv1 and above flagged those with .opd as ELFv2. | |
4020 | Set the output abiversion if not yet set, and for any input | |
4021 | still ambiguous, take its abiversion from the output. | |
4022 | Differences in ABI are reported later. */ | |
4023 | if (abiversion (info->output_bfd) == 0) | |
4024 | set_abiversion (info->output_bfd, abiversion (ibfd)); | |
4025 | else if (abiversion (ibfd) == 0) | |
4026 | set_abiversion (ibfd, abiversion (info->output_bfd)); | |
b3fac117 AM |
4027 | } |
4028 | ||
459609d6 AM |
4029 | htab = ppc_hash_table (info); |
4030 | if (htab == NULL) | |
b9399fcf | 4031 | return TRUE; |
459609d6 | 4032 | |
b9399fcf AM |
4033 | if (opd != NULL && opd->size != 0 |
4034 | && (ibfd->flags & DYNAMIC) == 0 | |
4035 | && (opd->flags & SEC_RELOC) != 0 | |
4036 | && opd->reloc_count != 0 | |
4037 | && !bfd_is_abs_section (opd->output_section) | |
4038 | && info->gc_sections) | |
4039 | { | |
4040 | /* Garbage collection needs some extra help with .opd sections. | |
4041 | We don't want to necessarily keep everything referenced by | |
4042 | relocs in .opd, as that would keep all functions. Instead, | |
4043 | if we reference an .opd symbol (a function descriptor), we | |
4044 | want to keep the function code symbol's section. This is | |
4045 | easy for global symbols, but for local syms we need to keep | |
4046 | information about the associated function section. */ | |
4047 | bfd_size_type amt; | |
4048 | asection **opd_sym_map; | |
4049 | Elf_Internal_Shdr *symtab_hdr; | |
4050 | Elf_Internal_Rela *relocs, *rel_end, *rel; | |
4051 | ||
4052 | amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map); | |
4053 | opd_sym_map = bfd_zalloc (ibfd, amt); | |
4054 | if (opd_sym_map == NULL) | |
4055 | return FALSE; | |
4056 | ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map; | |
4057 | relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL, | |
4058 | info->keep_memory); | |
4059 | if (relocs == NULL) | |
4060 | return FALSE; | |
4061 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
4062 | rel_end = relocs + opd->reloc_count - 1; | |
4063 | for (rel = relocs; rel < rel_end; rel++) | |
4064 | { | |
4065 | enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info); | |
4066 | unsigned long r_symndx = ELF64_R_SYM (rel->r_info); | |
4067 | ||
4068 | if (r_type == R_PPC64_ADDR64 | |
4069 | && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC | |
4070 | && r_symndx < symtab_hdr->sh_info) | |
4071 | { | |
4072 | Elf_Internal_Sym *isym; | |
4073 | asection *s; | |
4074 | ||
4075 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx); | |
4076 | if (isym == NULL) | |
4077 | { | |
4078 | if (elf_section_data (opd)->relocs != relocs) | |
4079 | free (relocs); | |
4080 | return FALSE; | |
4081 | } | |
4082 | ||
4083 | s = bfd_section_from_elf_index (ibfd, isym->st_shndx); | |
4084 | if (s != NULL && s != opd) | |
4085 | opd_sym_map[OPD_NDX (rel->r_offset)] = s; | |
4086 | } | |
4087 | } | |
4088 | if (elf_section_data (opd)->relocs != relocs) | |
4089 | free (relocs); | |
4090 | } | |
459609d6 AM |
4091 | |
4092 | p = &htab->dot_syms; | |
4093 | while ((eh = *p) != NULL) | |
4094 | { | |
4095 | *p = NULL; | |
4096 | if (&eh->elf == htab->elf.hgot) | |
4097 | ; | |
4098 | else if (htab->elf.hgot == NULL | |
4099 | && strcmp (eh->elf.root.root.string, ".TOC.") == 0) | |
4100 | htab->elf.hgot = &eh->elf; | |
8c5b4e52 AM |
4101 | else if (abiversion (ibfd) <= 1) |
4102 | { | |
4103 | htab->need_func_desc_adj = 1; | |
4104 | if (!add_symbol_adjust (eh, info)) | |
4105 | return FALSE; | |
4106 | } | |
459609d6 AM |
4107 | p = &eh->u.next_dot_sym; |
4108 | } | |
b3fac117 | 4109 | return TRUE; |
8387904d AM |
4110 | } |
4111 | ||
97fed1c9 JJ |
4112 | /* Undo hash table changes when an --as-needed input file is determined |
4113 | not to be needed. */ | |
4114 | ||
4115 | static bfd_boolean | |
e5034e59 AM |
4116 | ppc64_elf_notice_as_needed (bfd *ibfd, |
4117 | struct bfd_link_info *info, | |
4118 | enum notice_asneeded_action act) | |
97fed1c9 | 4119 | { |
e5034e59 AM |
4120 | if (act == notice_not_needed) |
4121 | { | |
4122 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
4dfe6ac6 | 4123 | |
e5034e59 AM |
4124 | if (htab == NULL) |
4125 | return FALSE; | |
4dfe6ac6 | 4126 | |
e5034e59 AM |
4127 | htab->dot_syms = NULL; |
4128 | } | |
4129 | return _bfd_elf_notice_as_needed (ibfd, info, act); | |
97fed1c9 JJ |
4130 | } |
4131 | ||
aa374f67 AM |
4132 | /* If --just-symbols against a final linked binary, then assume we need |
4133 | toc adjusting stubs when calling functions defined there. */ | |
4134 | ||
4135 | static void | |
4136 | ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info) | |
4137 | { | |
4138 | if ((sec->flags & SEC_CODE) != 0 | |
4139 | && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0 | |
4140 | && is_ppc64_elf (sec->owner)) | |
4141 | { | |
2c3f079f AM |
4142 | if (abiversion (sec->owner) >= 2 |
4143 | || bfd_get_section_by_name (sec->owner, ".opd") != NULL) | |
aa374f67 AM |
4144 | sec->has_toc_reloc = 1; |
4145 | } | |
4146 | _bfd_elf_link_just_syms (sec, info); | |
4147 | } | |
4148 | ||
e054468f | 4149 | static struct plt_entry ** |
4ce794b7 AM |
4150 | update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, |
4151 | unsigned long r_symndx, bfd_vma r_addend, int tls_type) | |
411e1bfb AM |
4152 | { |
4153 | struct got_entry **local_got_ents = elf_local_got_ents (abfd); | |
e054468f | 4154 | struct plt_entry **local_plt; |
f961d9dd | 4155 | unsigned char *local_got_tls_masks; |
411e1bfb AM |
4156 | |
4157 | if (local_got_ents == NULL) | |
4158 | { | |
4159 | bfd_size_type size = symtab_hdr->sh_info; | |
4160 | ||
e054468f AM |
4161 | size *= (sizeof (*local_got_ents) |
4162 | + sizeof (*local_plt) | |
4163 | + sizeof (*local_got_tls_masks)); | |
4ce794b7 | 4164 | local_got_ents = bfd_zalloc (abfd, size); |
411e1bfb | 4165 | if (local_got_ents == NULL) |
e054468f | 4166 | return NULL; |
411e1bfb AM |
4167 | elf_local_got_ents (abfd) = local_got_ents; |
4168 | } | |
4169 | ||
37da22e5 | 4170 | if ((tls_type & (NON_GOT | TLS_EXPLICIT)) == 0) |
411e1bfb AM |
4171 | { |
4172 | struct got_entry *ent; | |
4173 | ||
4174 | for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next) | |
e717da7e AM |
4175 | if (ent->addend == r_addend |
4176 | && ent->owner == abfd | |
4177 | && ent->tls_type == tls_type) | |
411e1bfb AM |
4178 | break; |
4179 | if (ent == NULL) | |
4180 | { | |
4181 | bfd_size_type amt = sizeof (*ent); | |
4ce794b7 | 4182 | ent = bfd_alloc (abfd, amt); |
411e1bfb AM |
4183 | if (ent == NULL) |
4184 | return FALSE; | |
4185 | ent->next = local_got_ents[r_symndx]; | |
4186 | ent->addend = r_addend; | |
e717da7e | 4187 | ent->owner = abfd; |
411e1bfb | 4188 | ent->tls_type = tls_type; |
927be08e | 4189 | ent->is_indirect = FALSE; |
411e1bfb AM |
4190 | ent->got.refcount = 0; |
4191 | local_got_ents[r_symndx] = ent; | |
4192 | } | |
4193 | ent->got.refcount += 1; | |
4194 | } | |
4195 | ||
e054468f | 4196 | local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info); |
f961d9dd | 4197 | local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info); |
37da22e5 | 4198 | local_got_tls_masks[r_symndx] |= tls_type & 0xff; |
e054468f AM |
4199 | |
4200 | return local_plt + r_symndx; | |
65f38f15 AM |
4201 | } |
4202 | ||
411e1bfb | 4203 | static bfd_boolean |
e054468f | 4204 | update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend) |
1e2f5b6e | 4205 | { |
411e1bfb | 4206 | struct plt_entry *ent; |
1e2f5b6e | 4207 | |
e054468f | 4208 | for (ent = *plist; ent != NULL; ent = ent->next) |
411e1bfb AM |
4209 | if (ent->addend == addend) |
4210 | break; | |
4211 | if (ent == NULL) | |
1e2f5b6e | 4212 | { |
411e1bfb | 4213 | bfd_size_type amt = sizeof (*ent); |
4ce794b7 | 4214 | ent = bfd_alloc (abfd, amt); |
411e1bfb AM |
4215 | if (ent == NULL) |
4216 | return FALSE; | |
e054468f | 4217 | ent->next = *plist; |
411e1bfb AM |
4218 | ent->addend = addend; |
4219 | ent->plt.refcount = 0; | |
e054468f | 4220 | *plist = ent; |
1e2f5b6e | 4221 | } |
411e1bfb | 4222 | ent->plt.refcount += 1; |
b34976b6 | 4223 | return TRUE; |
1e2f5b6e AM |
4224 | } |
4225 | ||
e054468f AM |
4226 | static bfd_boolean |
4227 | is_branch_reloc (enum elf_ppc64_reloc_type r_type) | |
4228 | { | |
4229 | return (r_type == R_PPC64_REL24 | |
05d0e962 | 4230 | || r_type == R_PPC64_REL24_NOTOC |
e054468f AM |
4231 | || r_type == R_PPC64_REL14 |
4232 | || r_type == R_PPC64_REL14_BRTAKEN | |
4233 | || r_type == R_PPC64_REL14_BRNTAKEN | |
4234 | || r_type == R_PPC64_ADDR24 | |
4235 | || r_type == R_PPC64_ADDR14 | |
4236 | || r_type == R_PPC64_ADDR14_BRTAKEN | |
23cedd1d AM |
4237 | || r_type == R_PPC64_ADDR14_BRNTAKEN |
4238 | || r_type == R_PPC64_PLTCALL); | |
4239 | } | |
4240 | ||
4241 | /* Relocs on inline plt call sequence insns prior to the call. */ | |
4242 | ||
4243 | static bfd_boolean | |
4244 | is_plt_seq_reloc (enum elf_ppc64_reloc_type r_type) | |
4245 | { | |
4246 | return (r_type == R_PPC64_PLT16_HA | |
4247 | || r_type == R_PPC64_PLT16_HI | |
4248 | || r_type == R_PPC64_PLT16_LO | |
4249 | || r_type == R_PPC64_PLT16_LO_DS | |
4250 | || r_type == R_PPC64_PLTSEQ); | |
e054468f AM |
4251 | } |
4252 | ||
5bd4f169 | 4253 | /* Look through the relocs for a section during the first phase, and |
65f38f15 | 4254 | calculate needed space in the global offset table, procedure |
5d1634d7 | 4255 | linkage table, and dynamic reloc sections. */ |
5bd4f169 | 4256 | |
b34976b6 | 4257 | static bfd_boolean |
4ce794b7 AM |
4258 | ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, |
4259 | asection *sec, const Elf_Internal_Rela *relocs) | |
5bd4f169 | 4260 | { |
65f38f15 | 4261 | struct ppc_link_hash_table *htab; |
5bd4f169 | 4262 | Elf_Internal_Shdr *symtab_hdr; |
c7e2358a | 4263 | struct elf_link_hash_entry **sym_hashes; |
5bd4f169 AM |
4264 | const Elf_Internal_Rela *rel; |
4265 | const Elf_Internal_Rela *rel_end; | |
5bd4f169 | 4266 | asection *sreloc; |
3a71aa26 | 4267 | struct elf_link_hash_entry *tga, *dottga; |
b9399fcf | 4268 | bfd_boolean is_opd; |
5bd4f169 | 4269 | |
0e1862bb | 4270 | if (bfd_link_relocatable (info)) |
b34976b6 | 4271 | return TRUE; |
5bd4f169 | 4272 | |
680a3378 AM |
4273 | /* Don't do anything special with non-loaded, non-alloced sections. |
4274 | In particular, any relocs in such sections should not affect GOT | |
4275 | and PLT reference counting (ie. we don't allow them to create GOT | |
4276 | or PLT entries), there's no possibility or desire to optimize TLS | |
4277 | relocs, and there's not much point in propagating relocs to shared | |
4278 | libs that the dynamic linker won't relocate. */ | |
4279 | if ((sec->flags & SEC_ALLOC) == 0) | |
4280 | return TRUE; | |
4281 | ||
0c8d6e5c | 4282 | BFD_ASSERT (is_ppc64_elf (abfd)); |
0ffa91dd | 4283 | |
65f38f15 | 4284 | htab = ppc_hash_table (info); |
4dfe6ac6 NC |
4285 | if (htab == NULL) |
4286 | return FALSE; | |
4287 | ||
3a71aa26 AM |
4288 | tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
4289 | FALSE, FALSE, TRUE); | |
4290 | dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr", | |
4291 | FALSE, FALSE, TRUE); | |
0ffa91dd | 4292 | symtab_hdr = &elf_symtab_hdr (abfd); |
5bd4f169 | 4293 | sym_hashes = elf_sym_hashes (abfd); |
5bd4f169 | 4294 | sreloc = NULL; |
b9399fcf | 4295 | is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd; |
5bd4f169 AM |
4296 | rel_end = relocs + sec->reloc_count; |
4297 | for (rel = relocs; rel < rel_end; rel++) | |
4298 | { | |
4299 | unsigned long r_symndx; | |
4300 | struct elf_link_hash_entry *h; | |
04c9666a | 4301 | enum elf_ppc64_reloc_type r_type; |
727fc41e | 4302 | int tls_type; |
7c8fe5c4 | 4303 | struct _ppc64_elf_section_data *ppc64_sec; |
cbf95972 | 4304 | struct plt_entry **ifunc, **plt_list; |
5bd4f169 AM |
4305 | |
4306 | r_symndx = ELF64_R_SYM (rel->r_info); | |
4307 | if (r_symndx < symtab_hdr->sh_info) | |
4308 | h = NULL; | |
4309 | else | |
973a3492 L |
4310 | { |
4311 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
b31867b6 | 4312 | h = elf_follow_link (h); |
1c865ab2 AM |
4313 | |
4314 | if (h == htab->elf.hgot) | |
4315 | sec->has_toc_reloc = 1; | |
973a3492 | 4316 | } |
5bd4f169 | 4317 | |
727fc41e | 4318 | tls_type = 0; |
e054468f | 4319 | ifunc = NULL; |
25f23106 AM |
4320 | if (h != NULL) |
4321 | { | |
4322 | if (h->type == STT_GNU_IFUNC) | |
4323 | { | |
4324 | h->needs_plt = 1; | |
4325 | ifunc = &h->plt.plist; | |
4326 | } | |
4327 | } | |
4328 | else | |
4329 | { | |
4330 | Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
4331 | abfd, r_symndx); | |
4332 | if (isym == NULL) | |
4333 | return FALSE; | |
4334 | ||
4335 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
4336 | { | |
4337 | ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, | |
37da22e5 AM |
4338 | rel->r_addend, |
4339 | NON_GOT | PLT_IFUNC); | |
25f23106 AM |
4340 | if (ifunc == NULL) |
4341 | return FALSE; | |
4342 | } | |
4343 | } | |
727fc41e | 4344 | |
cbf95972 | 4345 | r_type = ELF64_R_TYPE (rel->r_info); |
a33d1f77 | 4346 | switch (r_type) |
5bd4f169 | 4347 | { |
727fc41e AM |
4348 | case R_PPC64_TLSGD: |
4349 | case R_PPC64_TLSLD: | |
4350 | /* These special tls relocs tie a call to __tls_get_addr with | |
4351 | its parameter symbol. */ | |
37da22e5 AM |
4352 | if (h != NULL) |
4353 | ((struct ppc_link_hash_entry *) h)->tls_mask |= TLS_TLS | TLS_MARK; | |
4354 | else | |
4355 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, | |
4356 | rel->r_addend, | |
4357 | NON_GOT | TLS_TLS | TLS_MARK)) | |
4358 | return FALSE; | |
4359 | sec->has_tls_reloc = 1; | |
727fc41e AM |
4360 | break; |
4361 | ||
411e1bfb AM |
4362 | case R_PPC64_GOT_TLSLD16: |
4363 | case R_PPC64_GOT_TLSLD16_LO: | |
4364 | case R_PPC64_GOT_TLSLD16_HI: | |
4365 | case R_PPC64_GOT_TLSLD16_HA: | |
951fd09b | 4366 | tls_type = TLS_TLS | TLS_LD; |
411e1bfb AM |
4367 | goto dogottls; |
4368 | ||
4369 | case R_PPC64_GOT_TLSGD16: | |
4370 | case R_PPC64_GOT_TLSGD16_LO: | |
4371 | case R_PPC64_GOT_TLSGD16_HI: | |
4372 | case R_PPC64_GOT_TLSGD16_HA: | |
951fd09b | 4373 | tls_type = TLS_TLS | TLS_GD; |
411e1bfb AM |
4374 | goto dogottls; |
4375 | ||
4376 | case R_PPC64_GOT_TPREL16_DS: | |
4377 | case R_PPC64_GOT_TPREL16_LO_DS: | |
4378 | case R_PPC64_GOT_TPREL16_HI: | |
4379 | case R_PPC64_GOT_TPREL16_HA: | |
7c8bbca5 | 4380 | if (bfd_link_dll (info)) |
411e1bfb AM |
4381 | info->flags |= DF_STATIC_TLS; |
4382 | tls_type = TLS_TLS | TLS_TPREL; | |
4383 | goto dogottls; | |
4384 | ||
4385 | case R_PPC64_GOT_DTPREL16_DS: | |
4386 | case R_PPC64_GOT_DTPREL16_LO_DS: | |
4387 | case R_PPC64_GOT_DTPREL16_HI: | |
4388 | case R_PPC64_GOT_DTPREL16_HA: | |
4389 | tls_type = TLS_TLS | TLS_DTPREL; | |
4390 | dogottls: | |
4391 | sec->has_tls_reloc = 1; | |
066f4018 | 4392 | goto dogot; |
411e1bfb | 4393 | |
5bd4f169 | 4394 | case R_PPC64_GOT16_DS: |
65f38f15 | 4395 | case R_PPC64_GOT16_HA: |
066f4018 AM |
4396 | case R_PPC64_GOT16_LO_DS: |
4397 | ppc64_elf_tdata (abfd)->has_gotrel = 1; | |
4398 | ppc64_elf_section_data (sec)->has_gotrel = 1; | |
4399 | /* Fall through. */ | |
4400 | ||
4401 | case R_PPC64_GOT16: | |
65f38f15 AM |
4402 | case R_PPC64_GOT16_HI: |
4403 | case R_PPC64_GOT16_LO: | |
066f4018 | 4404 | dogot: |
65f38f15 | 4405 | /* This symbol requires a global offset table entry. */ |
4c52953f | 4406 | sec->has_toc_reloc = 1; |
33c0ec9d AM |
4407 | if (r_type == R_PPC64_GOT_TLSLD16 |
4408 | || r_type == R_PPC64_GOT_TLSGD16 | |
4409 | || r_type == R_PPC64_GOT_TPREL16_DS | |
4410 | || r_type == R_PPC64_GOT_DTPREL16_DS | |
4411 | || r_type == R_PPC64_GOT16 | |
4412 | || r_type == R_PPC64_GOT16_DS) | |
4413 | { | |
4414 | htab->do_multi_toc = 1; | |
d77c8a4b | 4415 | ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1; |
33c0ec9d AM |
4416 | } |
4417 | ||
e717da7e AM |
4418 | if (ppc64_elf_tdata (abfd)->got == NULL |
4419 | && !create_got_section (abfd, info)) | |
b34976b6 | 4420 | return FALSE; |
5bd4f169 AM |
4421 | |
4422 | if (h != NULL) | |
4423 | { | |
411e1bfb AM |
4424 | struct ppc_link_hash_entry *eh; |
4425 | struct got_entry *ent; | |
65f38f15 | 4426 | |
411e1bfb AM |
4427 | eh = (struct ppc_link_hash_entry *) h; |
4428 | for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next) | |
4429 | if (ent->addend == rel->r_addend | |
e717da7e | 4430 | && ent->owner == abfd |
411e1bfb AM |
4431 | && ent->tls_type == tls_type) |
4432 | break; | |
4433 | if (ent == NULL) | |
5bd4f169 | 4434 | { |
411e1bfb | 4435 | bfd_size_type amt = sizeof (*ent); |
4ce794b7 | 4436 | ent = bfd_alloc (abfd, amt); |
411e1bfb | 4437 | if (ent == NULL) |
b34976b6 | 4438 | return FALSE; |
411e1bfb AM |
4439 | ent->next = eh->elf.got.glist; |
4440 | ent->addend = rel->r_addend; | |
e717da7e | 4441 | ent->owner = abfd; |
411e1bfb | 4442 | ent->tls_type = tls_type; |
927be08e | 4443 | ent->is_indirect = FALSE; |
411e1bfb AM |
4444 | ent->got.refcount = 0; |
4445 | eh->elf.got.glist = ent; | |
5bd4f169 | 4446 | } |
411e1bfb | 4447 | ent->got.refcount += 1; |
e7b938ca | 4448 | eh->tls_mask |= tls_type; |
5bd4f169 | 4449 | } |
411e1bfb AM |
4450 | else |
4451 | /* This is a global offset table entry for a local symbol. */ | |
4452 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, | |
4453 | rel->r_addend, tls_type)) | |
4454 | return FALSE; | |
a345bc8d AM |
4455 | |
4456 | /* We may also need a plt entry if the symbol turns out to be | |
4457 | an ifunc. */ | |
0e1862bb | 4458 | if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1) |
a345bc8d AM |
4459 | { |
4460 | if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend)) | |
4461 | return FALSE; | |
4462 | } | |
5bd4f169 AM |
4463 | break; |
4464 | ||
5bd4f169 | 4465 | case R_PPC64_PLT16_HA: |
65f38f15 AM |
4466 | case R_PPC64_PLT16_HI: |
4467 | case R_PPC64_PLT16_LO: | |
08be3224 | 4468 | case R_PPC64_PLT16_LO_DS: |
65f38f15 AM |
4469 | case R_PPC64_PLT32: |
4470 | case R_PPC64_PLT64: | |
cbf95972 AM |
4471 | /* This symbol requires a procedure linkage table entry. */ |
4472 | plt_list = ifunc; | |
4473 | if (h != NULL) | |
e054468f | 4474 | { |
e054468f AM |
4475 | h->needs_plt = 1; |
4476 | if (h->root.root.string[0] == '.' | |
4477 | && h->root.root.string[1] != '\0') | |
4478 | ((struct ppc_link_hash_entry *) h)->is_func = 1; | |
2d7ad24e | 4479 | ((struct ppc_link_hash_entry *) h)->tls_mask |= PLT_KEEP; |
cbf95972 AM |
4480 | plt_list = &h->plt.plist; |
4481 | } | |
4482 | if (plt_list == NULL) | |
2d7ad24e AM |
4483 | plt_list = update_local_sym_info (abfd, symtab_hdr, r_symndx, |
4484 | rel->r_addend, | |
4485 | NON_GOT | PLT_KEEP); | |
cbf95972 AM |
4486 | if (!update_plt_info (abfd, plt_list, rel->r_addend)) |
4487 | return FALSE; | |
5bd4f169 AM |
4488 | break; |
4489 | ||
4490 | /* The following relocations don't need to propagate the | |
4491 | relocation if linking a shared object since they are | |
4492 | section relative. */ | |
4493 | case R_PPC64_SECTOFF: | |
4494 | case R_PPC64_SECTOFF_LO: | |
4495 | case R_PPC64_SECTOFF_HI: | |
4496 | case R_PPC64_SECTOFF_HA: | |
4497 | case R_PPC64_SECTOFF_DS: | |
4498 | case R_PPC64_SECTOFF_LO_DS: | |
411e1bfb AM |
4499 | case R_PPC64_DTPREL16: |
4500 | case R_PPC64_DTPREL16_LO: | |
4501 | case R_PPC64_DTPREL16_HI: | |
4502 | case R_PPC64_DTPREL16_HA: | |
4503 | case R_PPC64_DTPREL16_DS: | |
4504 | case R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
4505 | case R_PPC64_DTPREL16_HIGH: |
4506 | case R_PPC64_DTPREL16_HIGHA: | |
411e1bfb AM |
4507 | case R_PPC64_DTPREL16_HIGHER: |
4508 | case R_PPC64_DTPREL16_HIGHERA: | |
4509 | case R_PPC64_DTPREL16_HIGHEST: | |
4510 | case R_PPC64_DTPREL16_HIGHESTA: | |
5bd4f169 AM |
4511 | break; |
4512 | ||
ad8e1ba5 | 4513 | /* Nor do these. */ |
25f23106 AM |
4514 | case R_PPC64_REL16: |
4515 | case R_PPC64_REL16_LO: | |
4516 | case R_PPC64_REL16_HI: | |
4517 | case R_PPC64_REL16_HA: | |
4a969973 AM |
4518 | case R_PPC64_REL16_HIGH: |
4519 | case R_PPC64_REL16_HIGHA: | |
4520 | case R_PPC64_REL16_HIGHER: | |
4521 | case R_PPC64_REL16_HIGHERA: | |
4522 | case R_PPC64_REL16_HIGHEST: | |
4523 | case R_PPC64_REL16_HIGHESTA: | |
a680de9a | 4524 | case R_PPC64_REL16DX_HA: |
25f23106 AM |
4525 | break; |
4526 | ||
45965137 AM |
4527 | /* Not supported as a dynamic relocation. */ |
4528 | case R_PPC64_ADDR64_LOCAL: | |
0e1862bb | 4529 | if (bfd_link_pic (info)) |
45965137 AM |
4530 | { |
4531 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) | |
4532 | ppc_howto_init (); | |
695344c0 | 4533 | /* xgettext:c-format */ |
174d0a74 | 4534 | info->callbacks->einfo (_("%H: %s reloc unsupported " |
cf97bcb0 | 4535 | "in shared libraries and PIEs\n"), |
45965137 AM |
4536 | abfd, sec, rel->r_offset, |
4537 | ppc64_elf_howto_table[r_type]->name); | |
4538 | bfd_set_error (bfd_error_bad_value); | |
4539 | return FALSE; | |
4540 | } | |
4541 | break; | |
4542 | ||
ad8e1ba5 | 4543 | case R_PPC64_TOC16: |
33c0ec9d AM |
4544 | case R_PPC64_TOC16_DS: |
4545 | htab->do_multi_toc = 1; | |
d77c8a4b | 4546 | ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1; |
1a0670f3 | 4547 | /* Fall through. */ |
ad8e1ba5 AM |
4548 | case R_PPC64_TOC16_LO: |
4549 | case R_PPC64_TOC16_HI: | |
4550 | case R_PPC64_TOC16_HA: | |
ad8e1ba5 | 4551 | case R_PPC64_TOC16_LO_DS: |
4c52953f | 4552 | sec->has_toc_reloc = 1; |
ad8e1ba5 AM |
4553 | break; |
4554 | ||
006589cf AM |
4555 | /* Marker reloc. */ |
4556 | case R_PPC64_ENTRY: | |
4557 | break; | |
4558 | ||
5bd4f169 AM |
4559 | /* This relocation describes the C++ object vtable hierarchy. |
4560 | Reconstruct it for later use during GC. */ | |
4561 | case R_PPC64_GNU_VTINHERIT: | |
c152c796 | 4562 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 4563 | return FALSE; |
5bd4f169 AM |
4564 | break; |
4565 | ||
4566 | /* This relocation describes which C++ vtable entries are actually | |
4567 | used. Record for later use during GC. */ | |
4568 | case R_PPC64_GNU_VTENTRY: | |
a0ea3a14 | 4569 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 4570 | return FALSE; |
5bd4f169 AM |
4571 | break; |
4572 | ||
721956f4 AM |
4573 | case R_PPC64_REL14: |
4574 | case R_PPC64_REL14_BRTAKEN: | |
4575 | case R_PPC64_REL14_BRNTAKEN: | |
220c76dd AM |
4576 | { |
4577 | asection *dest = NULL; | |
4578 | ||
4579 | /* Heuristic: If jumping outside our section, chances are | |
4580 | we are going to need a stub. */ | |
4581 | if (h != NULL) | |
4582 | { | |
4583 | /* If the sym is weak it may be overridden later, so | |
4584 | don't assume we know where a weak sym lives. */ | |
4585 | if (h->root.type == bfd_link_hash_defined) | |
4586 | dest = h->root.u.def.section; | |
4587 | } | |
4588 | else | |
87d72d41 AM |
4589 | { |
4590 | Elf_Internal_Sym *isym; | |
4591 | ||
4592 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
4593 | abfd, r_symndx); | |
4594 | if (isym == NULL) | |
4595 | return FALSE; | |
4596 | ||
4597 | dest = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
4598 | } | |
4599 | ||
220c76dd | 4600 | if (dest != sec) |
7c8fe5c4 | 4601 | ppc64_elf_section_data (sec)->has_14bit_branch = 1; |
220c76dd | 4602 | } |
3e04d765 AM |
4603 | goto rel24; |
4604 | ||
4605 | case R_PPC64_PLTCALL: | |
4606 | ppc64_elf_section_data (sec)->has_pltcall = 1; | |
721956f4 AM |
4607 | /* Fall through. */ |
4608 | ||
5d1634d7 | 4609 | case R_PPC64_REL24: |
05d0e962 | 4610 | case R_PPC64_REL24_NOTOC: |
3e04d765 | 4611 | rel24: |
cbf95972 AM |
4612 | plt_list = ifunc; |
4613 | if (h != NULL) | |
5d1634d7 | 4614 | { |
e054468f AM |
4615 | h->needs_plt = 1; |
4616 | if (h->root.root.string[0] == '.' | |
4617 | && h->root.root.string[1] != '\0') | |
4618 | ((struct ppc_link_hash_entry *) h)->is_func = 1; | |
cbf95972 | 4619 | |
3a71aa26 | 4620 | if (h == tga || h == dottga) |
cbf95972 AM |
4621 | { |
4622 | sec->has_tls_reloc = 1; | |
4623 | if (rel != relocs | |
4624 | && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD | |
4625 | || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD)) | |
4626 | /* We have a new-style __tls_get_addr call with | |
4627 | a marker reloc. */ | |
4628 | ; | |
4629 | else | |
4630 | /* Mark this section as having an old-style call. */ | |
4631 | sec->has_tls_get_addr_call = 1; | |
4632 | } | |
4633 | plt_list = &h->plt.plist; | |
411e1bfb | 4634 | } |
cbf95972 AM |
4635 | |
4636 | /* We may need a .plt entry if the function this reloc | |
4637 | refers to is in a shared lib. */ | |
4638 | if (plt_list | |
4639 | && !update_plt_info (abfd, plt_list, rel->r_addend)) | |
4640 | return FALSE; | |
411e1bfb AM |
4641 | break; |
4642 | ||
cbf95972 AM |
4643 | case R_PPC64_ADDR14: |
4644 | case R_PPC64_ADDR14_BRNTAKEN: | |
4645 | case R_PPC64_ADDR14_BRTAKEN: | |
4646 | case R_PPC64_ADDR24: | |
4647 | goto dodyn; | |
4648 | ||
411e1bfb AM |
4649 | case R_PPC64_TPREL64: |
4650 | tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL; | |
7c8bbca5 | 4651 | if (bfd_link_dll (info)) |
411e1bfb AM |
4652 | info->flags |= DF_STATIC_TLS; |
4653 | goto dotlstoc; | |
4654 | ||
4655 | case R_PPC64_DTPMOD64: | |
4656 | if (rel + 1 < rel_end | |
4657 | && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) | |
4658 | && rel[1].r_offset == rel->r_offset + 8) | |
951fd09b | 4659 | tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD; |
411e1bfb | 4660 | else |
951fd09b | 4661 | tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD; |
411e1bfb AM |
4662 | goto dotlstoc; |
4663 | ||
4664 | case R_PPC64_DTPREL64: | |
4665 | tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL; | |
4666 | if (rel != relocs | |
4667 | && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64) | |
4668 | && rel[-1].r_offset == rel->r_offset - 8) | |
4669 | /* This is the second reloc of a dtpmod, dtprel pair. | |
4670 | Don't mark with TLS_DTPREL. */ | |
4671 | goto dodyn; | |
4672 | ||
4673 | dotlstoc: | |
4674 | sec->has_tls_reloc = 1; | |
4675 | if (h != NULL) | |
4676 | { | |
4677 | struct ppc_link_hash_entry *eh; | |
4678 | eh = (struct ppc_link_hash_entry *) h; | |
e7b938ca | 4679 | eh->tls_mask |= tls_type; |
411e1bfb AM |
4680 | } |
4681 | else | |
4682 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, | |
4683 | rel->r_addend, tls_type)) | |
4684 | return FALSE; | |
4685 | ||
7c8fe5c4 AM |
4686 | ppc64_sec = ppc64_elf_section_data (sec); |
4687 | if (ppc64_sec->sec_type != sec_toc) | |
411e1bfb | 4688 | { |
3a71aa26 AM |
4689 | bfd_size_type amt; |
4690 | ||
e7b938ca | 4691 | /* One extra to simplify get_tls_mask. */ |
3a71aa26 AM |
4692 | amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned); |
4693 | ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt); | |
4694 | if (ppc64_sec->u.toc.symndx == NULL) | |
4695 | return FALSE; | |
4696 | amt = sec->size * sizeof (bfd_vma) / 8; | |
4697 | ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt); | |
4698 | if (ppc64_sec->u.toc.add == NULL) | |
411e1bfb | 4699 | return FALSE; |
7c8fe5c4 AM |
4700 | BFD_ASSERT (ppc64_sec->sec_type == sec_normal); |
4701 | ppc64_sec->sec_type = sec_toc; | |
411e1bfb AM |
4702 | } |
4703 | BFD_ASSERT (rel->r_offset % 8 == 0); | |
3a71aa26 AM |
4704 | ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx; |
4705 | ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend; | |
951fd09b AM |
4706 | |
4707 | /* Mark the second slot of a GD or LD entry. | |
4708 | -1 to indicate GD and -2 to indicate LD. */ | |
4709 | if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD)) | |
3a71aa26 | 4710 | ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1; |
951fd09b | 4711 | else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD)) |
3a71aa26 | 4712 | ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2; |
411e1bfb AM |
4713 | goto dodyn; |
4714 | ||
4715 | case R_PPC64_TPREL16: | |
4716 | case R_PPC64_TPREL16_LO: | |
4717 | case R_PPC64_TPREL16_HI: | |
4718 | case R_PPC64_TPREL16_HA: | |
4719 | case R_PPC64_TPREL16_DS: | |
4720 | case R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
4721 | case R_PPC64_TPREL16_HIGH: |
4722 | case R_PPC64_TPREL16_HIGHA: | |
411e1bfb AM |
4723 | case R_PPC64_TPREL16_HIGHER: |
4724 | case R_PPC64_TPREL16_HIGHERA: | |
4725 | case R_PPC64_TPREL16_HIGHEST: | |
4726 | case R_PPC64_TPREL16_HIGHESTA: | |
7c8bbca5 AM |
4727 | if (bfd_link_dll (info)) |
4728 | info->flags |= DF_STATIC_TLS; | |
4729 | goto dodyn; | |
5d1634d7 | 4730 | |
e86ce104 | 4731 | case R_PPC64_ADDR64: |
b9399fcf | 4732 | if (is_opd |
1e2f5b6e | 4733 | && rel + 1 < rel_end |
4ce794b7 | 4734 | && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC) |
1e2f5b6e | 4735 | { |
8387904d | 4736 | if (h != NULL) |
8c5b4e52 | 4737 | ((struct ppc_link_hash_entry *) h)->is_func = 1; |
1e2f5b6e | 4738 | } |
e86ce104 AM |
4739 | /* Fall through. */ |
4740 | ||
65f38f15 AM |
4741 | case R_PPC64_ADDR16: |
4742 | case R_PPC64_ADDR16_DS: | |
4743 | case R_PPC64_ADDR16_HA: | |
4744 | case R_PPC64_ADDR16_HI: | |
f9c6b907 AM |
4745 | case R_PPC64_ADDR16_HIGH: |
4746 | case R_PPC64_ADDR16_HIGHA: | |
65f38f15 AM |
4747 | case R_PPC64_ADDR16_HIGHER: |
4748 | case R_PPC64_ADDR16_HIGHERA: | |
4749 | case R_PPC64_ADDR16_HIGHEST: | |
4750 | case R_PPC64_ADDR16_HIGHESTA: | |
4751 | case R_PPC64_ADDR16_LO: | |
4752 | case R_PPC64_ADDR16_LO_DS: | |
0e1862bb | 4753 | if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1 |
a345bc8d AM |
4754 | && rel->r_addend == 0) |
4755 | { | |
4756 | /* We may need a .plt entry if this reloc refers to a | |
4757 | function in a shared lib. */ | |
4758 | if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend)) | |
4759 | return FALSE; | |
4760 | h->pointer_equality_needed = 1; | |
4761 | } | |
4762 | /* Fall through. */ | |
4763 | ||
4764 | case R_PPC64_REL30: | |
4765 | case R_PPC64_REL32: | |
4766 | case R_PPC64_REL64: | |
65f38f15 | 4767 | case R_PPC64_ADDR32: |
65f38f15 AM |
4768 | case R_PPC64_UADDR16: |
4769 | case R_PPC64_UADDR32: | |
4770 | case R_PPC64_UADDR64: | |
5bd4f169 | 4771 | case R_PPC64_TOC: |
0e1862bb | 4772 | if (h != NULL && !bfd_link_pic (info)) |
81848ca0 | 4773 | /* We may need a copy reloc. */ |
f5385ebf | 4774 | h->non_got_ref = 1; |
81848ca0 | 4775 | |
41bd81ab | 4776 | /* Don't propagate .opd relocs. */ |
b9399fcf | 4777 | if (NO_OPD_RELOCS && is_opd) |
e86ce104 | 4778 | break; |
e86ce104 | 4779 | |
65f38f15 AM |
4780 | /* If we are creating a shared library, and this is a reloc |
4781 | against a global symbol, or a non PC relative reloc | |
4782 | against a local symbol, then we need to copy the reloc | |
4783 | into the shared library. However, if we are linking with | |
4784 | -Bsymbolic, we do not need to copy a reloc against a | |
4785 | global symbol which is defined in an object we are | |
4786 | including in the link (i.e., DEF_REGULAR is set). At | |
4787 | this point we have not seen all the input files, so it is | |
4788 | possible that DEF_REGULAR is not set now but will be set | |
4789 | later (it is never cleared). In case of a weak definition, | |
4790 | DEF_REGULAR may be cleared later by a strong definition in | |
4791 | a shared library. We account for that possibility below by | |
f4656909 | 4792 | storing information in the dyn_relocs field of the hash |
65f38f15 AM |
4793 | table entry. A similar situation occurs when creating |
4794 | shared libraries and symbol visibility changes render the | |
4795 | symbol local. | |
4796 | ||
4797 | If on the other hand, we are creating an executable, we | |
4798 | may need to keep relocations for symbols satisfied by a | |
4799 | dynamic library if we manage to avoid copy relocs for the | |
4800 | symbol. */ | |
411e1bfb | 4801 | dodyn: |
0e1862bb | 4802 | if ((bfd_link_pic (info) |
1d483afe | 4803 | && (must_be_dyn_reloc (info, r_type) |
65f38f15 | 4804 | || (h != NULL |
198f1157 | 4805 | && (!SYMBOLIC_BIND (info, h) |
65f38f15 | 4806 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 4807 | || !h->def_regular)))) |
f4656909 | 4808 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4809 | && !bfd_link_pic (info) |
65f38f15 AM |
4810 | && h != NULL |
4811 | && (h->root.type == bfd_link_hash_defweak | |
25f23106 | 4812 | || !h->def_regular)) |
0e1862bb | 4813 | || (!bfd_link_pic (info) |
25f23106 | 4814 | && ifunc != NULL)) |
5bd4f169 | 4815 | { |
65f38f15 AM |
4816 | /* We must copy these reloc types into the output file. |
4817 | Create a reloc section in dynobj and make room for | |
4818 | this reloc. */ | |
5bd4f169 AM |
4819 | if (sreloc == NULL) |
4820 | { | |
83bac4b0 NC |
4821 | sreloc = _bfd_elf_make_dynamic_reloc_section |
4822 | (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE); | |
65f38f15 | 4823 | |
5bd4f169 | 4824 | if (sreloc == NULL) |
83bac4b0 | 4825 | return FALSE; |
5bd4f169 AM |
4826 | } |
4827 | ||
65f38f15 AM |
4828 | /* If this is a global symbol, we count the number of |
4829 | relocations we need for this symbol. */ | |
4830 | if (h != NULL) | |
4831 | { | |
19e08130 AM |
4832 | struct elf_dyn_relocs *p; |
4833 | struct elf_dyn_relocs **head; | |
4834 | ||
ec338859 | 4835 | head = &((struct ppc_link_hash_entry *) h)->dyn_relocs; |
19e08130 AM |
4836 | p = *head; |
4837 | if (p == NULL || p->sec != sec) | |
4838 | { | |
4839 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); | |
4840 | if (p == NULL) | |
4841 | return FALSE; | |
4842 | p->next = *head; | |
4843 | *head = p; | |
4844 | p->sec = sec; | |
4845 | p->count = 0; | |
4846 | p->pc_count = 0; | |
4847 | } | |
4848 | p->count += 1; | |
4849 | if (!must_be_dyn_reloc (info, r_type)) | |
4850 | p->pc_count += 1; | |
65f38f15 AM |
4851 | } |
4852 | else | |
4853 | { | |
ec338859 AM |
4854 | /* Track dynamic relocs needed for local syms too. |
4855 | We really need local syms available to do this | |
4856 | easily. Oh well. */ | |
19e08130 AM |
4857 | struct ppc_dyn_relocs *p; |
4858 | struct ppc_dyn_relocs **head; | |
4859 | bfd_boolean is_ifunc; | |
ec338859 | 4860 | asection *s; |
6edfbbad | 4861 | void *vpp; |
87d72d41 | 4862 | Elf_Internal_Sym *isym; |
6edfbbad | 4863 | |
87d72d41 AM |
4864 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
4865 | abfd, r_symndx); | |
4866 | if (isym == NULL) | |
b34976b6 | 4867 | return FALSE; |
ec338859 | 4868 | |
87d72d41 AM |
4869 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
4870 | if (s == NULL) | |
4871 | s = sec; | |
4872 | ||
6edfbbad | 4873 | vpp = &elf_section_data (s)->local_dynrel; |
19e08130 AM |
4874 | head = (struct ppc_dyn_relocs **) vpp; |
4875 | is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC; | |
4876 | p = *head; | |
4877 | if (p != NULL && p->sec == sec && p->ifunc != is_ifunc) | |
4878 | p = p->next; | |
4879 | if (p == NULL || p->sec != sec || p->ifunc != is_ifunc) | |
4880 | { | |
4881 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); | |
4882 | if (p == NULL) | |
4883 | return FALSE; | |
4884 | p->next = *head; | |
4885 | *head = p; | |
4886 | p->sec = sec; | |
4887 | p->ifunc = is_ifunc; | |
4888 | p->count = 0; | |
4889 | } | |
4890 | p->count += 1; | |
ec338859 | 4891 | } |
65f38f15 | 4892 | } |
5bd4f169 | 4893 | break; |
65f38f15 AM |
4894 | |
4895 | default: | |
96e0dda4 | 4896 | break; |
5bd4f169 AM |
4897 | } |
4898 | } | |
4899 | ||
b34976b6 | 4900 | return TRUE; |
5bd4f169 AM |
4901 | } |
4902 | ||
ee67d69a AM |
4903 | /* Merge backend specific data from an object file to the output |
4904 | object file when linking. */ | |
4905 | ||
4906 | static bfd_boolean | |
50e03d47 | 4907 | ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
ee67d69a | 4908 | { |
50e03d47 | 4909 | bfd *obfd = info->output_bfd; |
ee67d69a AM |
4910 | unsigned long iflags, oflags; |
4911 | ||
4912 | if ((ibfd->flags & BFD_LINKER_CREATED) != 0) | |
4913 | return TRUE; | |
4914 | ||
4915 | if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd)) | |
4916 | return TRUE; | |
4917 | ||
50e03d47 | 4918 | if (!_bfd_generic_verify_endian_match (ibfd, info)) |
ee67d69a AM |
4919 | return FALSE; |
4920 | ||
4921 | iflags = elf_elfheader (ibfd)->e_flags; | |
4922 | oflags = elf_elfheader (obfd)->e_flags; | |
4923 | ||
f6c7c3e8 | 4924 | if (iflags & ~EF_PPC64_ABI) |
ee67d69a | 4925 | { |
4eca0228 | 4926 | _bfd_error_handler |
695344c0 | 4927 | /* xgettext:c-format */ |
871b3ab2 | 4928 | (_("%pB uses unknown e_flags 0x%lx"), ibfd, iflags); |
ee67d69a AM |
4929 | bfd_set_error (bfd_error_bad_value); |
4930 | return FALSE; | |
4931 | } | |
f6c7c3e8 | 4932 | else if (iflags != oflags && iflags != 0) |
ee67d69a | 4933 | { |
4eca0228 | 4934 | _bfd_error_handler |
695344c0 | 4935 | /* xgettext:c-format */ |
871b3ab2 | 4936 | (_("%pB: ABI version %ld is not compatible with ABI version %ld output"), |
ee67d69a AM |
4937 | ibfd, iflags, oflags); |
4938 | bfd_set_error (bfd_error_bad_value); | |
4939 | return FALSE; | |
4940 | } | |
4941 | ||
4a91d0ba AM |
4942 | if (!_bfd_elf_ppc_merge_fp_attributes (ibfd, info)) |
4943 | return FALSE; | |
005d79fd | 4944 | |
ee67d69a | 4945 | /* Merge Tag_compatibility attributes and any common GNU ones. */ |
8d2c8c3d | 4946 | return _bfd_elf_merge_object_attributes (ibfd, info); |
ee67d69a AM |
4947 | } |
4948 | ||
4949 | static bfd_boolean | |
4950 | ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr) | |
4951 | { | |
4952 | /* Print normal ELF private data. */ | |
4953 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
4954 | ||
4955 | if (elf_elfheader (abfd)->e_flags != 0) | |
4956 | { | |
4957 | FILE *file = ptr; | |
4958 | ||
ee67d69a AM |
4959 | fprintf (file, _("private flags = 0x%lx:"), |
4960 | elf_elfheader (abfd)->e_flags); | |
4961 | ||
4962 | if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0) | |
4963 | fprintf (file, _(" [abiv%ld]"), | |
4964 | elf_elfheader (abfd)->e_flags & EF_PPC64_ABI); | |
4965 | fputc ('\n', file); | |
4966 | } | |
4967 | ||
4968 | return TRUE; | |
4969 | } | |
4970 | ||
8387904d | 4971 | /* OFFSET in OPD_SEC specifies a function descriptor. Return the address |
b53dfeb2 AM |
4972 | of the code entry point, and its section, which must be in the same |
4973 | object as OPD_SEC. Returns (bfd_vma) -1 on error. */ | |
8387904d AM |
4974 | |
4975 | static bfd_vma | |
4976 | opd_entry_value (asection *opd_sec, | |
4977 | bfd_vma offset, | |
4978 | asection **code_sec, | |
aef36ac1 AM |
4979 | bfd_vma *code_off, |
4980 | bfd_boolean in_code_sec) | |
8387904d AM |
4981 | { |
4982 | bfd *opd_bfd = opd_sec->owner; | |
8860955f | 4983 | Elf_Internal_Rela *relocs; |
8387904d | 4984 | Elf_Internal_Rela *lo, *hi, *look; |
645ea6a9 | 4985 | bfd_vma val; |
8387904d | 4986 | |
9f296da3 AM |
4987 | /* No relocs implies we are linking a --just-symbols object, or looking |
4988 | at a final linked executable with addr2line or somesuch. */ | |
4b85d634 AM |
4989 | if (opd_sec->reloc_count == 0) |
4990 | { | |
729eabd5 | 4991 | bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents; |
3b36f7e6 | 4992 | |
729eabd5 AM |
4993 | if (contents == NULL) |
4994 | { | |
4995 | if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents)) | |
4996 | return (bfd_vma) -1; | |
4997 | ppc64_elf_tdata (opd_bfd)->opd.contents = contents; | |
4998 | } | |
ee1e4ede | 4999 | |
dbb3fbbb | 5000 | /* PR 17512: file: 64b9dfbb. */ |
451dfd38 | 5001 | if (offset + 7 >= opd_sec->size || offset + 7 < offset) |
dbb3fbbb NC |
5002 | return (bfd_vma) -1; |
5003 | ||
729eabd5 | 5004 | val = bfd_get_64 (opd_bfd, contents + offset); |
aef36ac1 AM |
5005 | if (code_sec != NULL) |
5006 | { | |
5007 | asection *sec, *likely = NULL; | |
ee1e4ede | 5008 | |
aef36ac1 | 5009 | if (in_code_sec) |
4b85d634 | 5010 | { |
aef36ac1 AM |
5011 | sec = *code_sec; |
5012 | if (sec->vma <= val | |
5013 | && val < sec->vma + sec->size) | |
5014 | likely = sec; | |
5015 | else | |
5016 | val = -1; | |
5017 | } | |
5018 | else | |
5019 | for (sec = opd_bfd->sections; sec != NULL; sec = sec->next) | |
5020 | if (sec->vma <= val | |
5021 | && (sec->flags & SEC_LOAD) != 0 | |
5022 | && (sec->flags & SEC_ALLOC) != 0) | |
5023 | likely = sec; | |
5024 | if (likely != NULL) | |
5025 | { | |
5026 | *code_sec = likely; | |
5027 | if (code_off != NULL) | |
5028 | *code_off = val - likely->vma; | |
4b85d634 AM |
5029 | } |
5030 | } | |
aef36ac1 | 5031 | return val; |
4b85d634 AM |
5032 | } |
5033 | ||
0c8d6e5c | 5034 | BFD_ASSERT (is_ppc64_elf (opd_bfd)); |
0ffa91dd | 5035 | |
729eabd5 | 5036 | relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs; |
8860955f AM |
5037 | if (relocs == NULL) |
5038 | relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE); | |
877a8638 NC |
5039 | /* PR 17512: file: df8e1fd6. */ |
5040 | if (relocs == NULL) | |
5041 | return (bfd_vma) -1; | |
645ea6a9 | 5042 | |
8387904d | 5043 | /* Go find the opd reloc at the sym address. */ |
8860955f | 5044 | lo = relocs; |
8387904d | 5045 | hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */ |
645ea6a9 | 5046 | val = (bfd_vma) -1; |
8387904d AM |
5047 | while (lo < hi) |
5048 | { | |
5049 | look = lo + (hi - lo) / 2; | |
5050 | if (look->r_offset < offset) | |
5051 | lo = look + 1; | |
5052 | else if (look->r_offset > offset) | |
5053 | hi = look; | |
5054 | else | |
5055 | { | |
0ffa91dd NC |
5056 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd); |
5057 | ||
8387904d AM |
5058 | if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64 |
5059 | && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC) | |
5060 | { | |
5061 | unsigned long symndx = ELF64_R_SYM (look->r_info); | |
b53dfeb2 | 5062 | asection *sec = NULL; |
8387904d | 5063 | |
b53dfeb2 AM |
5064 | if (symndx >= symtab_hdr->sh_info |
5065 | && elf_sym_hashes (opd_bfd) != NULL) | |
8387904d AM |
5066 | { |
5067 | struct elf_link_hash_entry **sym_hashes; | |
5068 | struct elf_link_hash_entry *rh; | |
5069 | ||
5070 | sym_hashes = elf_sym_hashes (opd_bfd); | |
5071 | rh = sym_hashes[symndx - symtab_hdr->sh_info]; | |
128205bb AM |
5072 | if (rh != NULL) |
5073 | { | |
5074 | rh = elf_follow_link (rh); | |
bb854a36 AM |
5075 | if (rh->root.type != bfd_link_hash_defined |
5076 | && rh->root.type != bfd_link_hash_defweak) | |
5077 | break; | |
5078 | if (rh->root.u.def.section->owner == opd_bfd) | |
b53dfeb2 | 5079 | { |
bb854a36 AM |
5080 | val = rh->root.u.def.value; |
5081 | sec = rh->root.u.def.section; | |
b53dfeb2 AM |
5082 | } |
5083 | } | |
5084 | } | |
5085 | ||
5086 | if (sec == NULL) | |
5087 | { | |
5088 | Elf_Internal_Sym *sym; | |
5089 | ||
5090 | if (symndx < symtab_hdr->sh_info) | |
5091 | { | |
5092 | sym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
5093 | if (sym == NULL) | |
5094 | { | |
5095 | size_t symcnt = symtab_hdr->sh_info; | |
5096 | sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, | |
5097 | symcnt, 0, | |
5098 | NULL, NULL, NULL); | |
5099 | if (sym == NULL) | |
5100 | break; | |
5101 | symtab_hdr->contents = (bfd_byte *) sym; | |
5102 | } | |
5103 | sym += symndx; | |
128205bb AM |
5104 | } |
5105 | else | |
5106 | { | |
b53dfeb2 AM |
5107 | sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, |
5108 | 1, symndx, | |
5109 | NULL, NULL, NULL); | |
128205bb AM |
5110 | if (sym == NULL) |
5111 | break; | |
128205bb | 5112 | } |
b53dfeb2 AM |
5113 | sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx); |
5114 | if (sec == NULL) | |
5115 | break; | |
5116 | BFD_ASSERT ((sec->flags & SEC_MERGE) == 0); | |
5117 | val = sym->st_value; | |
8387904d | 5118 | } |
b53dfeb2 | 5119 | |
8387904d AM |
5120 | val += look->r_addend; |
5121 | if (code_off != NULL) | |
5122 | *code_off = val; | |
5123 | if (code_sec != NULL) | |
aef36ac1 AM |
5124 | { |
5125 | if (in_code_sec && *code_sec != sec) | |
5126 | return -1; | |
5127 | else | |
5128 | *code_sec = sec; | |
5129 | } | |
b53dfeb2 | 5130 | if (sec->output_section != NULL) |
8387904d | 5131 | val += sec->output_section->vma + sec->output_offset; |
8387904d AM |
5132 | } |
5133 | break; | |
5134 | } | |
5135 | } | |
645ea6a9 | 5136 | |
645ea6a9 | 5137 | return val; |
8387904d AM |
5138 | } |
5139 | ||
aef36ac1 AM |
5140 | /* If the ELF symbol SYM might be a function in SEC, return the |
5141 | function size and set *CODE_OFF to the function's entry point, | |
5142 | otherwise return zero. */ | |
9f296da3 | 5143 | |
aef36ac1 AM |
5144 | static bfd_size_type |
5145 | ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec, | |
5146 | bfd_vma *code_off) | |
9f296da3 | 5147 | { |
aef36ac1 AM |
5148 | bfd_size_type size; |
5149 | ||
5150 | if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT | |
5151 | | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0) | |
5152 | return 0; | |
5153 | ||
5154 | size = 0; | |
5155 | if (!(sym->flags & BSF_SYNTHETIC)) | |
5156 | size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size; | |
5157 | ||
5158 | if (strcmp (sym->section->name, ".opd") == 0) | |
9f296da3 | 5159 | { |
b07bca4e AM |
5160 | struct _opd_sec_data *opd = get_opd_info (sym->section); |
5161 | bfd_vma symval = sym->value; | |
5162 | ||
5163 | if (opd != NULL | |
5164 | && opd->adjust != NULL | |
5165 | && elf_section_data (sym->section)->relocs != NULL) | |
5166 | { | |
5167 | /* opd_entry_value will use cached relocs that have been | |
5168 | adjusted, but with raw symbols. That means both local | |
5169 | and global symbols need adjusting. */ | |
5170 | long adjust = opd->adjust[OPD_NDX (symval)]; | |
5171 | if (adjust == -1) | |
5172 | return 0; | |
5173 | symval += adjust; | |
5174 | } | |
5175 | ||
5176 | if (opd_entry_value (sym->section, symval, | |
aef36ac1 AM |
5177 | &sec, code_off, TRUE) == (bfd_vma) -1) |
5178 | return 0; | |
5179 | /* An old ABI binary with dot-syms has a size of 24 on the .opd | |
5180 | symbol. This size has nothing to do with the code size of the | |
5181 | function, which is what we're supposed to return, but the | |
5182 | code size isn't available without looking up the dot-sym. | |
5183 | However, doing that would be a waste of time particularly | |
5184 | since elf_find_function will look at the dot-sym anyway. | |
5185 | Now, elf_find_function will keep the largest size of any | |
5186 | function sym found at the code address of interest, so return | |
5187 | 1 here to avoid it incorrectly caching a larger function size | |
5188 | for a small function. This does mean we return the wrong | |
5189 | size for a new-ABI function of size 24, but all that does is | |
5190 | disable caching for such functions. */ | |
5191 | if (size == 24) | |
5192 | size = 1; | |
9f296da3 | 5193 | } |
aef36ac1 AM |
5194 | else |
5195 | { | |
5196 | if (sym->section != sec) | |
5197 | return 0; | |
5198 | *code_off = sym->value; | |
5199 | } | |
5200 | if (size == 0) | |
5201 | size = 1; | |
5202 | return size; | |
9f296da3 AM |
5203 | } |
5204 | ||
f378ab09 AM |
5205 | /* Return true if symbol is a strong function defined in an ELFv2 |
5206 | object with st_other localentry bits of zero, ie. its local entry | |
5207 | point coincides with its global entry point. */ | |
5208 | ||
5209 | static bfd_boolean | |
5210 | is_elfv2_localentry0 (struct elf_link_hash_entry *h) | |
5211 | { | |
5212 | return (h != NULL | |
5213 | && h->type == STT_FUNC | |
5214 | && h->root.type == bfd_link_hash_defined | |
5215 | && (STO_PPC64_LOCAL_MASK & h->other) == 0 | |
8b5f1ed8 | 5216 | && !((struct ppc_link_hash_entry *) h)->non_zero_localentry |
f378ab09 AM |
5217 | && is_ppc64_elf (h->root.u.def.section->owner) |
5218 | && abiversion (h->root.u.def.section->owner) >= 2); | |
5219 | } | |
5220 | ||
854b41e7 AM |
5221 | /* Return true if symbol is defined in a regular object file. */ |
5222 | ||
5223 | static bfd_boolean | |
5224 | is_static_defined (struct elf_link_hash_entry *h) | |
5225 | { | |
5226 | return ((h->root.type == bfd_link_hash_defined | |
5227 | || h->root.type == bfd_link_hash_defweak) | |
5228 | && h->root.u.def.section != NULL | |
5229 | && h->root.u.def.section->output_section != NULL); | |
5230 | } | |
5231 | ||
b31867b6 AM |
5232 | /* If FDH is a function descriptor symbol, return the associated code |
5233 | entry symbol if it is defined. Return NULL otherwise. */ | |
5234 | ||
5235 | static struct ppc_link_hash_entry * | |
5236 | defined_code_entry (struct ppc_link_hash_entry *fdh) | |
5237 | { | |
5238 | if (fdh->is_func_descriptor) | |
5239 | { | |
5240 | struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh); | |
5241 | if (fh->elf.root.type == bfd_link_hash_defined | |
5242 | || fh->elf.root.type == bfd_link_hash_defweak) | |
5243 | return fh; | |
5244 | } | |
5245 | return NULL; | |
5246 | } | |
5247 | ||
5248 | /* If FH is a function code entry symbol, return the associated | |
5249 | function descriptor symbol if it is defined. Return NULL otherwise. */ | |
5250 | ||
5251 | static struct ppc_link_hash_entry * | |
5252 | defined_func_desc (struct ppc_link_hash_entry *fh) | |
5253 | { | |
5254 | if (fh->oh != NULL | |
5255 | && fh->oh->is_func_descriptor) | |
5256 | { | |
5257 | struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh); | |
5258 | if (fdh->elf.root.type == bfd_link_hash_defined | |
5259 | || fdh->elf.root.type == bfd_link_hash_defweak) | |
5260 | return fdh; | |
5261 | } | |
5262 | return NULL; | |
5263 | } | |
5264 | ||
8c5b4e52 AM |
5265 | static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *); |
5266 | ||
5267 | /* Garbage collect sections, after first dealing with dot-symbols. */ | |
5268 | ||
5269 | static bfd_boolean | |
5270 | ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info) | |
5271 | { | |
5272 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
5273 | ||
5274 | if (htab != NULL && htab->need_func_desc_adj) | |
5275 | { | |
5276 | elf_link_hash_traverse (&htab->elf, func_desc_adjust, info); | |
5277 | htab->need_func_desc_adj = 0; | |
5278 | } | |
5279 | return bfd_elf_gc_sections (abfd, info); | |
5280 | } | |
5281 | ||
74f0fb50 AM |
5282 | /* Mark all our entry sym sections, both opd and code section. */ |
5283 | ||
5284 | static void | |
5285 | ppc64_elf_gc_keep (struct bfd_link_info *info) | |
5286 | { | |
5287 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
5288 | struct bfd_sym_chain *sym; | |
5289 | ||
4dfe6ac6 NC |
5290 | if (htab == NULL) |
5291 | return; | |
5292 | ||
74f0fb50 AM |
5293 | for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) |
5294 | { | |
b31867b6 | 5295 | struct ppc_link_hash_entry *eh, *fh; |
74f0fb50 AM |
5296 | asection *sec; |
5297 | ||
5298 | eh = (struct ppc_link_hash_entry *) | |
b31867b6 | 5299 | elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE); |
74f0fb50 AM |
5300 | if (eh == NULL) |
5301 | continue; | |
5302 | if (eh->elf.root.type != bfd_link_hash_defined | |
5303 | && eh->elf.root.type != bfd_link_hash_defweak) | |
5304 | continue; | |
5305 | ||
b31867b6 AM |
5306 | fh = defined_code_entry (eh); |
5307 | if (fh != NULL) | |
74f0fb50 | 5308 | { |
b31867b6 | 5309 | sec = fh->elf.root.u.def.section; |
74f0fb50 AM |
5310 | sec->flags |= SEC_KEEP; |
5311 | } | |
5312 | else if (get_opd_info (eh->elf.root.u.def.section) != NULL | |
5313 | && opd_entry_value (eh->elf.root.u.def.section, | |
5314 | eh->elf.root.u.def.value, | |
aef36ac1 | 5315 | &sec, NULL, FALSE) != (bfd_vma) -1) |
74f0fb50 AM |
5316 | sec->flags |= SEC_KEEP; |
5317 | ||
5318 | sec = eh->elf.root.u.def.section; | |
5319 | sec->flags |= SEC_KEEP; | |
5320 | } | |
5321 | } | |
5322 | ||
64d03ab5 AM |
5323 | /* Mark sections containing dynamically referenced symbols. When |
5324 | building shared libraries, we must assume that any visible symbol is | |
5325 | referenced. */ | |
5326 | ||
5327 | static bfd_boolean | |
5328 | ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf) | |
5329 | { | |
5330 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5331 | struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h; | |
b31867b6 | 5332 | struct ppc_link_hash_entry *fdh; |
b407645f | 5333 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
64d03ab5 | 5334 | |
64d03ab5 | 5335 | /* Dynamic linking info is on the func descriptor sym. */ |
b31867b6 AM |
5336 | fdh = defined_func_desc (eh); |
5337 | if (fdh != NULL) | |
5338 | eh = fdh; | |
64d03ab5 AM |
5339 | |
5340 | if ((eh->elf.root.type == bfd_link_hash_defined | |
5341 | || eh->elf.root.type == bfd_link_hash_defweak) | |
87e79a65 | 5342 | && ((eh->elf.ref_dynamic && !eh->elf.forced_local) |
1c9177d9 | 5343 | || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf)) |
64d03ab5 | 5344 | && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL |
4c58e0d8 | 5345 | && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN |
0e1862bb | 5346 | && (!bfd_link_executable (info) |
e278ae05 | 5347 | || info->gc_keep_exported |
b407645f AM |
5348 | || info->export_dynamic |
5349 | || (eh->elf.dynamic | |
5350 | && d != NULL | |
2cdcc330 AM |
5351 | && (*d->match) (&d->head, NULL, |
5352 | eh->elf.root.root.string))) | |
e278ae05 | 5353 | && (eh->elf.versioned >= versioned |
4c58e0d8 AM |
5354 | || !bfd_hide_sym_by_version (info->version_info, |
5355 | eh->elf.root.root.string))))) | |
64d03ab5 AM |
5356 | { |
5357 | asection *code_sec; | |
b31867b6 | 5358 | struct ppc_link_hash_entry *fh; |
64d03ab5 AM |
5359 | |
5360 | eh->elf.root.u.def.section->flags |= SEC_KEEP; | |
5361 | ||
5362 | /* Function descriptor syms cause the associated | |
5363 | function code sym section to be marked. */ | |
b31867b6 AM |
5364 | fh = defined_code_entry (eh); |
5365 | if (fh != NULL) | |
5366 | { | |
5367 | code_sec = fh->elf.root.u.def.section; | |
5368 | code_sec->flags |= SEC_KEEP; | |
5369 | } | |
64d03ab5 AM |
5370 | else if (get_opd_info (eh->elf.root.u.def.section) != NULL |
5371 | && opd_entry_value (eh->elf.root.u.def.section, | |
5372 | eh->elf.root.u.def.value, | |
aef36ac1 | 5373 | &code_sec, NULL, FALSE) != (bfd_vma) -1) |
64d03ab5 AM |
5374 | code_sec->flags |= SEC_KEEP; |
5375 | } | |
5376 | ||
5377 | return TRUE; | |
5378 | } | |
5379 | ||
5bd4f169 AM |
5380 | /* Return the section that should be marked against GC for a given |
5381 | relocation. */ | |
5382 | ||
5383 | static asection * | |
4ce794b7 | 5384 | ppc64_elf_gc_mark_hook (asection *sec, |
fb34365b | 5385 | struct bfd_link_info *info, |
4ce794b7 AM |
5386 | Elf_Internal_Rela *rel, |
5387 | struct elf_link_hash_entry *h, | |
5388 | Elf_Internal_Sym *sym) | |
5bd4f169 | 5389 | { |
ccfa59ea AM |
5390 | asection *rsec; |
5391 | ||
ccfa59ea AM |
5392 | /* Syms return NULL if we're marking .opd, so we avoid marking all |
5393 | function sections, as all functions are referenced in .opd. */ | |
5394 | rsec = NULL; | |
5395 | if (get_opd_info (sec) != NULL) | |
5396 | return rsec; | |
1e2f5b6e | 5397 | |
5bd4f169 AM |
5398 | if (h != NULL) |
5399 | { | |
04c9666a | 5400 | enum elf_ppc64_reloc_type r_type; |
b31867b6 | 5401 | struct ppc_link_hash_entry *eh, *fh, *fdh; |
a33d1f77 | 5402 | |
4ce794b7 | 5403 | r_type = ELF64_R_TYPE (rel->r_info); |
a33d1f77 | 5404 | switch (r_type) |
5bd4f169 AM |
5405 | { |
5406 | case R_PPC64_GNU_VTINHERIT: | |
5407 | case R_PPC64_GNU_VTENTRY: | |
5408 | break; | |
5409 | ||
5410 | default: | |
5411 | switch (h->root.type) | |
5412 | { | |
5413 | case bfd_link_hash_defined: | |
5414 | case bfd_link_hash_defweak: | |
ccfa59ea | 5415 | eh = (struct ppc_link_hash_entry *) h; |
b31867b6 AM |
5416 | fdh = defined_func_desc (eh); |
5417 | if (fdh != NULL) | |
8c5b4e52 AM |
5418 | { |
5419 | /* -mcall-aixdesc code references the dot-symbol on | |
5420 | a call reloc. Mark the function descriptor too | |
5421 | against garbage collection. */ | |
5422 | fdh->elf.mark = 1; | |
60d67dc8 AM |
5423 | if (fdh->elf.is_weakalias) |
5424 | weakdef (&fdh->elf)->mark = 1; | |
8c5b4e52 AM |
5425 | eh = fdh; |
5426 | } | |
1e2f5b6e AM |
5427 | |
5428 | /* Function descriptor syms cause the associated | |
5429 | function code sym section to be marked. */ | |
b31867b6 AM |
5430 | fh = defined_code_entry (eh); |
5431 | if (fh != NULL) | |
ccfa59ea AM |
5432 | { |
5433 | /* They also mark their opd section. */ | |
74f0fb50 | 5434 | eh->elf.root.u.def.section->gc_mark = 1; |
ccfa59ea | 5435 | |
b31867b6 | 5436 | rsec = fh->elf.root.u.def.section; |
ccfa59ea | 5437 | } |
8387904d AM |
5438 | else if (get_opd_info (eh->elf.root.u.def.section) != NULL |
5439 | && opd_entry_value (eh->elf.root.u.def.section, | |
5440 | eh->elf.root.u.def.value, | |
aef36ac1 | 5441 | &rsec, NULL, FALSE) != (bfd_vma) -1) |
74f0fb50 | 5442 | eh->elf.root.u.def.section->gc_mark = 1; |
ccfa59ea | 5443 | else |
1e2f5b6e AM |
5444 | rsec = h->root.u.def.section; |
5445 | break; | |
5bd4f169 AM |
5446 | |
5447 | case bfd_link_hash_common: | |
1e2f5b6e AM |
5448 | rsec = h->root.u.c.p->section; |
5449 | break; | |
5bd4f169 AM |
5450 | |
5451 | default: | |
fb34365b | 5452 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
5bd4f169 AM |
5453 | } |
5454 | } | |
5455 | } | |
5456 | else | |
5457 | { | |
74f0fb50 | 5458 | struct _opd_sec_data *opd; |
1e2f5b6e AM |
5459 | |
5460 | rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
74f0fb50 AM |
5461 | opd = get_opd_info (rsec); |
5462 | if (opd != NULL && opd->func_sec != NULL) | |
ccfa59ea | 5463 | { |
74f0fb50 | 5464 | rsec->gc_mark = 1; |
ccfa59ea | 5465 | |
51aecdc5 | 5466 | rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)]; |
ccfa59ea | 5467 | } |
5bd4f169 AM |
5468 | } |
5469 | ||
1e2f5b6e | 5470 | return rsec; |
5bd4f169 AM |
5471 | } |
5472 | ||
deb0e272 AM |
5473 | /* The maximum size of .sfpr. */ |
5474 | #define SFPR_MAX (218*4) | |
5475 | ||
5476 | struct sfpr_def_parms | |
5477 | { | |
699733f6 AM |
5478 | const char name[12]; |
5479 | unsigned char lo, hi; | |
2cdcc330 AM |
5480 | bfd_byte *(*write_ent) (bfd *, bfd_byte *, int); |
5481 | bfd_byte *(*write_tail) (bfd *, bfd_byte *, int); | |
deb0e272 AM |
5482 | }; |
5483 | ||
a4b6fadd AM |
5484 | /* Auto-generate _save*, _rest* functions in .sfpr. |
5485 | If STUB_SEC is non-null, define alias symbols in STUB_SEC | |
5486 | instead. */ | |
deb0e272 | 5487 | |
4dfe6ac6 | 5488 | static bfd_boolean |
a4b6fadd AM |
5489 | sfpr_define (struct bfd_link_info *info, |
5490 | const struct sfpr_def_parms *parm, | |
5491 | asection *stub_sec) | |
deb0e272 AM |
5492 | { |
5493 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
5494 | unsigned int i; | |
5495 | size_t len = strlen (parm->name); | |
5496 | bfd_boolean writing = FALSE; | |
699733f6 | 5497 | char sym[16]; |
deb0e272 | 5498 | |
4dfe6ac6 NC |
5499 | if (htab == NULL) |
5500 | return FALSE; | |
5501 | ||
deb0e272 AM |
5502 | memcpy (sym, parm->name, len); |
5503 | sym[len + 2] = 0; | |
5504 | ||
5505 | for (i = parm->lo; i <= parm->hi; i++) | |
5506 | { | |
a4b6fadd | 5507 | struct ppc_link_hash_entry *h; |
deb0e272 AM |
5508 | |
5509 | sym[len + 0] = i / 10 + '0'; | |
5510 | sym[len + 1] = i % 10 + '0'; | |
a4b6fadd | 5511 | h = (struct ppc_link_hash_entry *) |
b32547cd | 5512 | elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE); |
a4b6fadd | 5513 | if (stub_sec != NULL) |
deb0e272 | 5514 | { |
a4b6fadd AM |
5515 | if (h != NULL |
5516 | && h->elf.root.type == bfd_link_hash_defined | |
5517 | && h->elf.root.u.def.section == htab->sfpr) | |
5518 | { | |
5519 | struct elf_link_hash_entry *s; | |
5520 | char buf[32]; | |
5521 | sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym); | |
5522 | s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE); | |
5523 | if (s == NULL) | |
5524 | return FALSE; | |
5525 | if (s->root.type == bfd_link_hash_new | |
5526 | || (s->root.type = bfd_link_hash_defined | |
5527 | && s->root.u.def.section == stub_sec)) | |
5528 | { | |
5529 | s->root.type = bfd_link_hash_defined; | |
5530 | s->root.u.def.section = stub_sec; | |
7dda8d3c | 5531 | s->root.u.def.value = (stub_sec->size - htab->sfpr->size |
a4b6fadd AM |
5532 | + h->elf.root.u.def.value); |
5533 | s->ref_regular = 1; | |
5534 | s->def_regular = 1; | |
5535 | s->ref_regular_nonweak = 1; | |
5536 | s->forced_local = 1; | |
5537 | s->non_elf = 0; | |
5538 | s->root.linker_def = 1; | |
5539 | } | |
5540 | } | |
5541 | continue; | |
5542 | } | |
5543 | if (h != NULL) | |
5544 | { | |
5545 | h->save_res = 1; | |
5546 | if (!h->elf.def_regular) | |
deb0e272 | 5547 | { |
a4b6fadd AM |
5548 | h->elf.root.type = bfd_link_hash_defined; |
5549 | h->elf.root.u.def.section = htab->sfpr; | |
5550 | h->elf.root.u.def.value = htab->sfpr->size; | |
5551 | h->elf.type = STT_FUNC; | |
5552 | h->elf.def_regular = 1; | |
b32547cd | 5553 | h->elf.non_elf = 0; |
a4b6fadd AM |
5554 | _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE); |
5555 | writing = TRUE; | |
deb0e272 | 5556 | if (htab->sfpr->contents == NULL) |
a4b6fadd | 5557 | { |
2cdcc330 AM |
5558 | htab->sfpr->contents |
5559 | = bfd_alloc (htab->elf.dynobj, SFPR_MAX); | |
a4b6fadd AM |
5560 | if (htab->sfpr->contents == NULL) |
5561 | return FALSE; | |
5562 | } | |
deb0e272 AM |
5563 | } |
5564 | } | |
5565 | if (writing) | |
5566 | { | |
5567 | bfd_byte *p = htab->sfpr->contents + htab->sfpr->size; | |
5568 | if (i != parm->hi) | |
5569 | p = (*parm->write_ent) (htab->elf.dynobj, p, i); | |
5570 | else | |
5571 | p = (*parm->write_tail) (htab->elf.dynobj, p, i); | |
5572 | htab->sfpr->size = p - htab->sfpr->contents; | |
5573 | } | |
5574 | } | |
5575 | ||
5576 | return TRUE; | |
5577 | } | |
5578 | ||
5579 | static bfd_byte * | |
5580 | savegpr0 (bfd *abfd, bfd_byte *p, int r) | |
5581 | { | |
5582 | bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); | |
5583 | return p + 4; | |
5584 | } | |
5585 | ||
5586 | static bfd_byte * | |
5587 | savegpr0_tail (bfd *abfd, bfd_byte *p, int r) | |
5588 | { | |
5589 | p = savegpr0 (abfd, p, r); | |
a078d95a | 5590 | bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p); |
deb0e272 AM |
5591 | p = p + 4; |
5592 | bfd_put_32 (abfd, BLR, p); | |
5593 | return p + 4; | |
5594 | } | |
5595 | ||
5596 | static bfd_byte * | |
5597 | restgpr0 (bfd *abfd, bfd_byte *p, int r) | |
5598 | { | |
5599 | bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); | |
5600 | return p + 4; | |
5601 | } | |
5602 | ||
5603 | static bfd_byte * | |
5604 | restgpr0_tail (bfd *abfd, bfd_byte *p, int r) | |
5605 | { | |
a078d95a | 5606 | bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p); |
deb0e272 AM |
5607 | p = p + 4; |
5608 | p = restgpr0 (abfd, p, r); | |
5609 | bfd_put_32 (abfd, MTLR_R0, p); | |
5610 | p = p + 4; | |
5611 | if (r == 29) | |
5612 | { | |
5613 | p = restgpr0 (abfd, p, 30); | |
5614 | p = restgpr0 (abfd, p, 31); | |
5615 | } | |
5616 | bfd_put_32 (abfd, BLR, p); | |
5617 | return p + 4; | |
5618 | } | |
5619 | ||
5620 | static bfd_byte * | |
5621 | savegpr1 (bfd *abfd, bfd_byte *p, int r) | |
5622 | { | |
5623 | bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p); | |
5624 | return p + 4; | |
5625 | } | |
5626 | ||
5627 | static bfd_byte * | |
5628 | savegpr1_tail (bfd *abfd, bfd_byte *p, int r) | |
5629 | { | |
5630 | p = savegpr1 (abfd, p, r); | |
5631 | bfd_put_32 (abfd, BLR, p); | |
5632 | return p + 4; | |
5633 | } | |
5634 | ||
5635 | static bfd_byte * | |
5636 | restgpr1 (bfd *abfd, bfd_byte *p, int r) | |
5637 | { | |
5638 | bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p); | |
5639 | return p + 4; | |
5640 | } | |
5641 | ||
5642 | static bfd_byte * | |
5643 | restgpr1_tail (bfd *abfd, bfd_byte *p, int r) | |
5644 | { | |
5645 | p = restgpr1 (abfd, p, r); | |
5646 | bfd_put_32 (abfd, BLR, p); | |
5647 | return p + 4; | |
5648 | } | |
5649 | ||
5650 | static bfd_byte * | |
5651 | savefpr (bfd *abfd, bfd_byte *p, int r) | |
5652 | { | |
5653 | bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); | |
5654 | return p + 4; | |
5655 | } | |
5656 | ||
5657 | static bfd_byte * | |
5658 | savefpr0_tail (bfd *abfd, bfd_byte *p, int r) | |
5659 | { | |
5660 | p = savefpr (abfd, p, r); | |
a078d95a | 5661 | bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p); |
deb0e272 AM |
5662 | p = p + 4; |
5663 | bfd_put_32 (abfd, BLR, p); | |
5664 | return p + 4; | |
5665 | } | |
5666 | ||
5667 | static bfd_byte * | |
5668 | restfpr (bfd *abfd, bfd_byte *p, int r) | |
5669 | { | |
5670 | bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); | |
5671 | return p + 4; | |
5672 | } | |
5673 | ||
5674 | static bfd_byte * | |
5675 | restfpr0_tail (bfd *abfd, bfd_byte *p, int r) | |
5676 | { | |
a078d95a | 5677 | bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p); |
deb0e272 AM |
5678 | p = p + 4; |
5679 | p = restfpr (abfd, p, r); | |
5680 | bfd_put_32 (abfd, MTLR_R0, p); | |
5681 | p = p + 4; | |
5682 | if (r == 29) | |
5683 | { | |
5684 | p = restfpr (abfd, p, 30); | |
5685 | p = restfpr (abfd, p, 31); | |
5686 | } | |
5687 | bfd_put_32 (abfd, BLR, p); | |
5688 | return p + 4; | |
5689 | } | |
5690 | ||
5691 | static bfd_byte * | |
5692 | savefpr1_tail (bfd *abfd, bfd_byte *p, int r) | |
5693 | { | |
5694 | p = savefpr (abfd, p, r); | |
5695 | bfd_put_32 (abfd, BLR, p); | |
5696 | return p + 4; | |
5697 | } | |
5698 | ||
5699 | static bfd_byte * | |
5700 | restfpr1_tail (bfd *abfd, bfd_byte *p, int r) | |
5701 | { | |
5702 | p = restfpr (abfd, p, r); | |
5703 | bfd_put_32 (abfd, BLR, p); | |
5704 | return p + 4; | |
5705 | } | |
5706 | ||
5707 | static bfd_byte * | |
5708 | savevr (bfd *abfd, bfd_byte *p, int r) | |
5709 | { | |
5710 | bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p); | |
5711 | p = p + 4; | |
5712 | bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p); | |
5713 | return p + 4; | |
5714 | } | |
5715 | ||
5716 | static bfd_byte * | |
5717 | savevr_tail (bfd *abfd, bfd_byte *p, int r) | |
5718 | { | |
5719 | p = savevr (abfd, p, r); | |
5720 | bfd_put_32 (abfd, BLR, p); | |
5721 | return p + 4; | |
5722 | } | |
5723 | ||
5724 | static bfd_byte * | |
5725 | restvr (bfd *abfd, bfd_byte *p, int r) | |
5726 | { | |
5727 | bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p); | |
5728 | p = p + 4; | |
5729 | bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p); | |
5730 | return p + 4; | |
5731 | } | |
5732 | ||
5733 | static bfd_byte * | |
5734 | restvr_tail (bfd *abfd, bfd_byte *p, int r) | |
5735 | { | |
5736 | p = restvr (abfd, p, r); | |
5737 | bfd_put_32 (abfd, BLR, p); | |
5738 | return p + 4; | |
5739 | } | |
5740 | ||
e86ce104 AM |
5741 | /* Called via elf_link_hash_traverse to transfer dynamic linking |
5742 | information on function code symbol entries to their corresponding | |
5743 | function descriptor symbol entries. */ | |
deb0e272 | 5744 | |
b34976b6 | 5745 | static bfd_boolean |
4ce794b7 | 5746 | func_desc_adjust (struct elf_link_hash_entry *h, void *inf) |
5bd4f169 | 5747 | { |
e86ce104 | 5748 | struct bfd_link_info *info; |
65f38f15 | 5749 | struct ppc_link_hash_table *htab; |
50bc7936 AM |
5750 | struct ppc_link_hash_entry *fh; |
5751 | struct ppc_link_hash_entry *fdh; | |
5752 | bfd_boolean force_local; | |
5bd4f169 | 5753 | |
50bc7936 AM |
5754 | fh = (struct ppc_link_hash_entry *) h; |
5755 | if (fh->elf.root.type == bfd_link_hash_indirect) | |
b34976b6 | 5756 | return TRUE; |
e86ce104 | 5757 | |
8c5b4e52 AM |
5758 | if (!fh->is_func) |
5759 | return TRUE; | |
5760 | ||
5761 | if (fh->elf.root.root.string[0] != '.' | |
5762 | || fh->elf.root.root.string[1] == '\0') | |
5763 | return TRUE; | |
5764 | ||
4ce794b7 | 5765 | info = inf; |
65f38f15 | 5766 | htab = ppc_hash_table (info); |
4dfe6ac6 NC |
5767 | if (htab == NULL) |
5768 | return FALSE; | |
5bd4f169 | 5769 | |
8c5b4e52 AM |
5770 | /* Find the corresponding function descriptor symbol. */ |
5771 | fdh = lookup_fdh (fh, htab); | |
5772 | ||
c09bdfe5 AM |
5773 | /* Resolve undefined references to dot-symbols as the value |
5774 | in the function descriptor, if we have one in a regular object. | |
5775 | This is to satisfy cases like ".quad .foo". Calls to functions | |
5776 | in dynamic objects are handled elsewhere. */ | |
8c5b4e52 AM |
5777 | if ((fh->elf.root.type == bfd_link_hash_undefined |
5778 | || fh->elf.root.type == bfd_link_hash_undefweak) | |
5779 | && (fdh->elf.root.type == bfd_link_hash_defined | |
5780 | || fdh->elf.root.type == bfd_link_hash_defweak) | |
b31867b6 AM |
5781 | && get_opd_info (fdh->elf.root.u.def.section) != NULL |
5782 | && opd_entry_value (fdh->elf.root.u.def.section, | |
5783 | fdh->elf.root.u.def.value, | |
c09bdfe5 | 5784 | &fh->elf.root.u.def.section, |
aef36ac1 | 5785 | &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1) |
c09bdfe5 | 5786 | { |
b31867b6 | 5787 | fh->elf.root.type = fdh->elf.root.type; |
f5385ebf | 5788 | fh->elf.forced_local = 1; |
b31867b6 AM |
5789 | fh->elf.def_regular = fdh->elf.def_regular; |
5790 | fh->elf.def_dynamic = fdh->elf.def_dynamic; | |
c09bdfe5 AM |
5791 | } |
5792 | ||
8c5b4e52 AM |
5793 | if (!fh->elf.dynamic) |
5794 | { | |
5795 | struct plt_entry *ent; | |
5bd4f169 | 5796 | |
8c5b4e52 AM |
5797 | for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next) |
5798 | if (ent->plt.refcount > 0) | |
5799 | break; | |
5800 | if (ent == NULL) | |
5801 | return TRUE; | |
5802 | } | |
5bd4f169 | 5803 | |
8c5b4e52 | 5804 | /* Create a descriptor as undefined if necessary. */ |
50bc7936 | 5805 | if (fdh == NULL |
0e1862bb | 5806 | && !bfd_link_executable (info) |
50bc7936 AM |
5807 | && (fh->elf.root.type == bfd_link_hash_undefined |
5808 | || fh->elf.root.type == bfd_link_hash_undefweak)) | |
5809 | { | |
908b32fc | 5810 | fdh = make_fdh (info, fh); |
bb700d78 AM |
5811 | if (fdh == NULL) |
5812 | return FALSE; | |
50bc7936 | 5813 | } |
648cca2c | 5814 | |
8c5b4e52 | 5815 | /* We can't support overriding of symbols on a fake descriptor. */ |
908b32fc AM |
5816 | if (fdh != NULL |
5817 | && fdh->fake | |
8c5b4e52 AM |
5818 | && (fh->elf.root.type == bfd_link_hash_defined |
5819 | || fh->elf.root.type == bfd_link_hash_defweak)) | |
5820 | _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE); | |
908b32fc | 5821 | |
8c5b4e52 AM |
5822 | /* Transfer dynamic linking information to the function descriptor. */ |
5823 | if (fdh != NULL) | |
5824 | { | |
f5385ebf AM |
5825 | fdh->elf.ref_regular |= fh->elf.ref_regular; |
5826 | fdh->elf.ref_dynamic |= fh->elf.ref_dynamic; | |
5827 | fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak; | |
5828 | fdh->elf.non_got_ref |= fh->elf.non_got_ref; | |
8c5b4e52 AM |
5829 | fdh->elf.dynamic |= fh->elf.dynamic; |
5830 | fdh->elf.needs_plt |= (fh->elf.needs_plt | |
5831 | || fh->elf.type == STT_FUNC | |
5832 | || fh->elf.type == STT_GNU_IFUNC); | |
5833 | move_plt_plist (fh, fdh); | |
5834 | ||
5835 | if (!fdh->elf.forced_local | |
5836 | && fh->elf.dynindx != -1) | |
5837 | if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf)) | |
5838 | return FALSE; | |
e86ce104 AM |
5839 | } |
5840 | ||
50bc7936 AM |
5841 | /* Now that the info is on the function descriptor, clear the |
5842 | function code sym info. Any function code syms for which we | |
5843 | don't have a definition in a regular file, we force local. | |
5844 | This prevents a shared library from exporting syms that have | |
5845 | been imported from another library. Function code syms that | |
5846 | are really in the library we must leave global to prevent the | |
5847 | linker dragging in a definition from a static library. */ | |
93f3fa99 AM |
5848 | force_local = (!fh->elf.def_regular |
5849 | || fdh == NULL | |
5850 | || !fdh->elf.def_regular | |
5851 | || fdh->elf.forced_local); | |
50bc7936 AM |
5852 | _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); |
5853 | ||
b34976b6 | 5854 | return TRUE; |
e86ce104 | 5855 | } |
40b8271b | 5856 | |
a4b6fadd AM |
5857 | static const struct sfpr_def_parms save_res_funcs[] = |
5858 | { | |
5859 | { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail }, | |
5860 | { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail }, | |
5861 | { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail }, | |
5862 | { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail }, | |
5863 | { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail }, | |
5864 | { "_savefpr_", 14, 31, savefpr, savefpr0_tail }, | |
5865 | { "_restfpr_", 14, 29, restfpr, restfpr0_tail }, | |
5866 | { "_restfpr_", 30, 31, restfpr, restfpr0_tail }, | |
5867 | { "._savef", 14, 31, savefpr, savefpr1_tail }, | |
5868 | { "._restf", 14, 31, restfpr, restfpr1_tail }, | |
5869 | { "_savevr_", 20, 31, savevr, savevr_tail }, | |
5870 | { "_restvr_", 20, 31, restvr, restvr_tail } | |
5871 | }; | |
5872 | ||
e86ce104 | 5873 | /* Called near the start of bfd_elf_size_dynamic_sections. We use |
82bd7b59 AM |
5874 | this hook to a) provide some gcc support functions, and b) transfer |
5875 | dynamic linking information gathered so far on function code symbol | |
5876 | entries, to their corresponding function descriptor symbol entries. */ | |
deb0e272 | 5877 | |
b34976b6 | 5878 | static bfd_boolean |
4ce794b7 AM |
5879 | ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED, |
5880 | struct bfd_link_info *info) | |
e86ce104 AM |
5881 | { |
5882 | struct ppc_link_hash_table *htab; | |
5883 | ||
5884 | htab = ppc_hash_table (info); | |
4dfe6ac6 NC |
5885 | if (htab == NULL) |
5886 | return FALSE; | |
5887 | ||
b32547cd AM |
5888 | /* Provide any missing _save* and _rest* functions. */ |
5889 | if (htab->sfpr != NULL) | |
5890 | { | |
5891 | unsigned int i; | |
5892 | ||
5893 | htab->sfpr->size = 0; | |
5894 | for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++) | |
5895 | if (!sfpr_define (info, &save_res_funcs[i], NULL)) | |
5896 | return FALSE; | |
5897 | if (htab->sfpr->size == 0) | |
5898 | htab->sfpr->flags |= SEC_EXCLUDE; | |
5899 | } | |
5900 | ||
5901 | if (bfd_link_relocatable (info)) | |
5902 | return TRUE; | |
5903 | ||
5904 | if (htab->elf.hgot != NULL) | |
dba6fa9b AM |
5905 | { |
5906 | _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE); | |
5907 | /* Make .TOC. defined so as to prevent it being made dynamic. | |
5908 | The wrong value here is fixed later in ppc64_elf_set_toc. */ | |
43417696 AM |
5909 | if (!htab->elf.hgot->def_regular |
5910 | || htab->elf.hgot->root.type != bfd_link_hash_defined) | |
5911 | { | |
5912 | htab->elf.hgot->root.type = bfd_link_hash_defined; | |
5913 | htab->elf.hgot->root.u.def.value = 0; | |
5914 | htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr; | |
5915 | htab->elf.hgot->def_regular = 1; | |
5916 | htab->elf.hgot->root.linker_def = 1; | |
5917 | } | |
dba6fa9b | 5918 | htab->elf.hgot->type = STT_OBJECT; |
2cdcc330 AM |
5919 | htab->elf.hgot->other |
5920 | = (htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
dba6fa9b | 5921 | } |
c66bb0ee | 5922 | |
8c5b4e52 AM |
5923 | if (htab->need_func_desc_adj) |
5924 | { | |
5925 | elf_link_hash_traverse (&htab->elf, func_desc_adjust, info); | |
5926 | htab->need_func_desc_adj = 0; | |
5927 | } | |
805fc799 | 5928 | |
b34976b6 | 5929 | return TRUE; |
e86ce104 AM |
5930 | } |
5931 | ||
98bbb1b8 | 5932 | /* Find dynamic relocs for H that apply to read-only sections. */ |
a345bc8d | 5933 | |
98bbb1b8 | 5934 | static asection * |
a345bc8d AM |
5935 | readonly_dynrelocs (struct elf_link_hash_entry *h) |
5936 | { | |
5937 | struct ppc_link_hash_entry *eh; | |
5938 | struct elf_dyn_relocs *p; | |
5939 | ||
5940 | eh = (struct ppc_link_hash_entry *) h; | |
5941 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
5942 | { | |
5943 | asection *s = p->sec->output_section; | |
5944 | ||
5945 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
98bbb1b8 | 5946 | return p->sec; |
a345bc8d | 5947 | } |
98bbb1b8 | 5948 | return NULL; |
a345bc8d AM |
5949 | } |
5950 | ||
d311bc8b | 5951 | /* Return true if we have dynamic relocs against H or any of its weak |
ab2477e1 AM |
5952 | aliases, that apply to read-only sections. Cannot be used after |
5953 | size_dynamic_sections. */ | |
d311bc8b AM |
5954 | |
5955 | static bfd_boolean | |
5956 | alias_readonly_dynrelocs (struct elf_link_hash_entry *h) | |
5957 | { | |
5958 | struct ppc_link_hash_entry *eh; | |
5959 | ||
5960 | eh = (struct ppc_link_hash_entry *) h; | |
5961 | do | |
5962 | { | |
5963 | if (readonly_dynrelocs (&eh->elf)) | |
5964 | return TRUE; | |
ab2477e1 | 5965 | eh = (struct ppc_link_hash_entry *) eh->elf.u.alias; |
2cdcc330 AM |
5966 | } |
5967 | while (eh != NULL && &eh->elf != h); | |
d311bc8b AM |
5968 | |
5969 | return FALSE; | |
5970 | } | |
8a2058b5 | 5971 | |
8a9e8e72 AM |
5972 | /* Return whether EH has pc-relative dynamic relocs. */ |
5973 | ||
5974 | static bfd_boolean | |
5975 | pc_dynrelocs (struct ppc_link_hash_entry *eh) | |
5976 | { | |
5977 | struct elf_dyn_relocs *p; | |
5978 | ||
5979 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
5980 | if (p->pc_count != 0) | |
5981 | return TRUE; | |
5982 | return FALSE; | |
5983 | } | |
5984 | ||
8a2058b5 AM |
5985 | /* Return true if a global entry stub will be created for H. Valid |
5986 | for ELFv2 before plt entries have been allocated. */ | |
5987 | ||
5988 | static bfd_boolean | |
5989 | global_entry_stub (struct elf_link_hash_entry *h) | |
5990 | { | |
5991 | struct plt_entry *pent; | |
5992 | ||
5993 | if (!h->pointer_equality_needed | |
5994 | || h->def_regular) | |
5995 | return FALSE; | |
5996 | ||
5997 | for (pent = h->plt.plist; pent != NULL; pent = pent->next) | |
5998 | if (pent->plt.refcount > 0 | |
5999 | && pent->addend == 0) | |
6000 | return TRUE; | |
6001 | ||
6002 | return FALSE; | |
6003 | } | |
6004 | ||
e86ce104 AM |
6005 | /* Adjust a symbol defined by a dynamic object and referenced by a |
6006 | regular object. The current definition is in some section of the | |
6007 | dynamic object, but we're not including those sections. We have to | |
6008 | change the definition to something the rest of the link can | |
6009 | understand. */ | |
6010 | ||
b34976b6 | 6011 | static bfd_boolean |
4ce794b7 AM |
6012 | ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
6013 | struct elf_link_hash_entry *h) | |
e86ce104 AM |
6014 | { |
6015 | struct ppc_link_hash_table *htab; | |
5474d94f | 6016 | asection *s, *srel; |
e86ce104 AM |
6017 | |
6018 | htab = ppc_hash_table (info); | |
4dfe6ac6 NC |
6019 | if (htab == NULL) |
6020 | return FALSE; | |
e86ce104 AM |
6021 | |
6022 | /* Deal with function syms. */ | |
6023 | if (h->type == STT_FUNC | |
e054468f | 6024 | || h->type == STT_GNU_IFUNC |
f5385ebf | 6025 | || h->needs_plt) |
e86ce104 | 6026 | { |
529fe20e AM |
6027 | bfd_boolean local = (((struct ppc_link_hash_entry *) h)->save_res |
6028 | || SYMBOL_CALLS_LOCAL (info, h) | |
6029 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); | |
6030 | /* Discard dyn_relocs when non-pic if we've decided that a | |
6031 | function symbol is local and not an ifunc. We keep dynamic | |
6032 | relocs for ifuncs when local rather than always emitting a | |
6033 | plt call stub for them and defining the symbol on the call | |
6034 | stub. We can't do that for ELFv1 anyway (a function symbol | |
6035 | is defined on a descriptor, not code) and it can be faster at | |
6036 | run-time due to not needing to bounce through a stub. The | |
6037 | dyn_relocs for ifuncs will be applied even in a static | |
6038 | executable. */ | |
6039 | if (!bfd_link_pic (info) | |
6040 | && h->type != STT_GNU_IFUNC | |
6041 | && local) | |
6042 | ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL; | |
6043 | ||
e86ce104 AM |
6044 | /* Clear procedure linkage table information for any symbol that |
6045 | won't need a .plt entry. */ | |
411e1bfb AM |
6046 | struct plt_entry *ent; |
6047 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) | |
6048 | if (ent->plt.refcount > 0) | |
6049 | break; | |
8387904d | 6050 | if (ent == NULL |
2d7ad24e AM |
6051 | || (h->type != STT_GNU_IFUNC |
6052 | && local | |
3e04d765 AM |
6053 | && (htab->can_convert_all_inline_plt |
6054 | || (((struct ppc_link_hash_entry *) h)->tls_mask | |
6055 | & (TLS_TLS | PLT_KEEP)) != PLT_KEEP))) | |
40b8271b | 6056 | { |
411e1bfb | 6057 | h->plt.plist = NULL; |
f5385ebf | 6058 | h->needs_plt = 0; |
d1eca1e4 | 6059 | h->pointer_equality_needed = 0; |
40b8271b | 6060 | } |
8a2058b5 | 6061 | else if (abiversion (info->output_bfd) >= 2) |
a345bc8d | 6062 | { |
d1eca1e4 AM |
6063 | /* Taking a function's address in a read/write section |
6064 | doesn't require us to define the function symbol in the | |
6065 | executable on a global entry stub. A dynamic reloc can | |
8a2058b5 AM |
6066 | be used instead. The reason we prefer a few more dynamic |
6067 | relocs is that calling via a global entry stub costs a | |
6068 | few more instructions, and pointer_equality_needed causes | |
6069 | extra work in ld.so when resolving these symbols. */ | |
529fe20e | 6070 | if (global_entry_stub (h)) |
d1eca1e4 | 6071 | { |
ab2477e1 | 6072 | if (!readonly_dynrelocs (h)) |
529fe20e AM |
6073 | { |
6074 | h->pointer_equality_needed = 0; | |
04383fd1 AM |
6075 | /* If we haven't seen a branch reloc and the symbol |
6076 | isn't an ifunc then we don't need a plt entry. */ | |
529fe20e AM |
6077 | if (!h->needs_plt) |
6078 | h->plt.plist = NULL; | |
6079 | } | |
6080 | else if (!bfd_link_pic (info)) | |
6081 | /* We are going to be defining the function symbol on the | |
6082 | plt stub, so no dyn_relocs needed when non-pic. */ | |
6083 | ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL; | |
d1eca1e4 AM |
6084 | } |
6085 | ||
3988aed5 AM |
6086 | /* ELFv2 function symbols can't have copy relocs. */ |
6087 | return TRUE; | |
6088 | } | |
6089 | else if (!h->needs_plt | |
ab2477e1 | 6090 | && !readonly_dynrelocs (h)) |
3988aed5 | 6091 | { |
04383fd1 AM |
6092 | /* If we haven't seen a branch reloc and the symbol isn't an |
6093 | ifunc then we don't need a plt entry. */ | |
3988aed5 AM |
6094 | h->plt.plist = NULL; |
6095 | h->pointer_equality_needed = 0; | |
a345bc8d AM |
6096 | return TRUE; |
6097 | } | |
5bd4f169 | 6098 | } |
bbd7ec4a | 6099 | else |
411e1bfb | 6100 | h->plt.plist = NULL; |
5bd4f169 AM |
6101 | |
6102 | /* If this is a weak symbol, and there is a real definition, the | |
6103 | processor independent code will have arranged for us to see the | |
6104 | real definition first, and we can just use the same value. */ | |
60d67dc8 | 6105 | if (h->is_weakalias) |
5bd4f169 | 6106 | { |
60d67dc8 AM |
6107 | struct elf_link_hash_entry *def = weakdef (h); |
6108 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
6109 | h->root.u.def.section = def->root.u.def.section; | |
6110 | h->root.u.def.value = def->root.u.def.value; | |
4a7e5234 AM |
6111 | if (def->root.u.def.section == htab->elf.sdynbss |
6112 | || def->root.u.def.section == htab->elf.sdynrelro) | |
6113 | ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL; | |
b34976b6 | 6114 | return TRUE; |
5bd4f169 AM |
6115 | } |
6116 | ||
5bd4f169 AM |
6117 | /* If we are creating a shared library, we must presume that the |
6118 | only references to the symbol are via the global offset table. | |
6119 | For such cases we need not do anything here; the relocations will | |
6120 | be handled correctly by relocate_section. */ | |
0e1862bb | 6121 | if (bfd_link_pic (info)) |
b34976b6 | 6122 | return TRUE; |
5bd4f169 | 6123 | |
65f38f15 AM |
6124 | /* If there are no references to this symbol that do not use the |
6125 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 6126 | if (!h->non_got_ref) |
b34976b6 | 6127 | return TRUE; |
65f38f15 | 6128 | |
b186458a | 6129 | /* Don't generate a copy reloc for symbols defined in the executable. */ |
d93d1c80 | 6130 | if (!h->def_dynamic || !h->ref_regular || h->def_regular |
b186458a | 6131 | |
d93d1c80 AM |
6132 | /* If -z nocopyreloc was given, don't generate them either. */ |
6133 | || info->nocopyreloc | |
a127494f | 6134 | |
dce2246a | 6135 | /* If we don't find any dynamic relocs in read-only sections, then |
d93d1c80 | 6136 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
d311bc8b | 6137 | || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h)) |
65f38f15 | 6138 | |
d93d1c80 AM |
6139 | /* Protected variables do not work with .dynbss. The copy in |
6140 | .dynbss won't be used by the shared library with the protected | |
6141 | definition for the variable. Text relocations are preferable | |
6142 | to an incorrect program. */ | |
6143 | || h->protected_def) | |
529fe20e | 6144 | return TRUE; |
a127494f | 6145 | |
5d35169e | 6146 | if (h->plt.plist != NULL) |
97b639ba AM |
6147 | { |
6148 | /* We should never get here, but unfortunately there are versions | |
6149 | of gcc out there that improperly (for this ABI) put initialized | |
6150 | function pointers, vtable refs and suchlike in read-only | |
6151 | sections. Allow them to proceed, but warn that this might | |
6152 | break at runtime. */ | |
25f53a85 | 6153 | info->callbacks->einfo |
c1c8c1ef | 6154 | (_("%P: copy reloc against `%pT' requires lazy plt linking; " |
25f53a85 | 6155 | "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"), |
97b639ba AM |
6156 | h->root.root.string); |
6157 | } | |
5d35169e AM |
6158 | |
6159 | /* This is a reference to a symbol defined by a dynamic object which | |
6160 | is not a function. */ | |
6161 | ||
5bd4f169 AM |
6162 | /* We must allocate the symbol in our .dynbss section, which will |
6163 | become part of the .bss section of the executable. There will be | |
6164 | an entry for this symbol in the .dynsym section. The dynamic | |
6165 | object will contain position independent code, so all references | |
6166 | from the dynamic object to this symbol will go through the global | |
6167 | offset table. The dynamic linker will use the .dynsym entry to | |
6168 | determine the address it must put in the global offset table, so | |
6169 | both the dynamic object and the regular object will refer to the | |
6170 | same memory location for the variable. */ | |
5474d94f AM |
6171 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
6172 | { | |
6173 | s = htab->elf.sdynrelro; | |
6174 | srel = htab->elf.sreldynrelro; | |
6175 | } | |
6176 | else | |
6177 | { | |
6178 | s = htab->elf.sdynbss; | |
6179 | srel = htab->elf.srelbss; | |
6180 | } | |
1d7e9d18 | 6181 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
5bd4f169 | 6182 | { |
4a7e5234 AM |
6183 | /* We must generate a R_PPC64_COPY reloc to tell the dynamic |
6184 | linker to copy the initial value out of the dynamic object | |
6185 | and into the runtime process image. */ | |
5474d94f | 6186 | srel->size += sizeof (Elf64_External_Rela); |
f5385ebf | 6187 | h->needs_copy = 1; |
5bd4f169 AM |
6188 | } |
6189 | ||
529fe20e AM |
6190 | /* We no longer want dyn_relocs. */ |
6191 | ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL; | |
6cabe1ea | 6192 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
5bd4f169 AM |
6193 | } |
6194 | ||
e86ce104 AM |
6195 | /* If given a function descriptor symbol, hide both the function code |
6196 | sym and the descriptor. */ | |
6197 | static void | |
4ce794b7 AM |
6198 | ppc64_elf_hide_symbol (struct bfd_link_info *info, |
6199 | struct elf_link_hash_entry *h, | |
6200 | bfd_boolean force_local) | |
e86ce104 | 6201 | { |
34814b9f | 6202 | struct ppc_link_hash_entry *eh; |
e86ce104 AM |
6203 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); |
6204 | ||
87469ba2 AM |
6205 | if (ppc_hash_table (info) == NULL) |
6206 | return; | |
6207 | ||
34814b9f AM |
6208 | eh = (struct ppc_link_hash_entry *) h; |
6209 | if (eh->is_func_descriptor) | |
e86ce104 | 6210 | { |
34814b9f | 6211 | struct ppc_link_hash_entry *fh = eh->oh; |
e86ce104 | 6212 | |
721956f4 | 6213 | if (fh == NULL) |
d1329ca3 AM |
6214 | { |
6215 | const char *p, *q; | |
b8ac2841 | 6216 | struct elf_link_hash_table *htab = elf_hash_table (info); |
d1329ca3 AM |
6217 | char save; |
6218 | ||
6219 | /* We aren't supposed to use alloca in BFD because on | |
6220 | systems which do not have alloca the version in libiberty | |
6221 | calls xmalloc, which might cause the program to crash | |
6222 | when it runs out of memory. This function doesn't have a | |
6223 | return status, so there's no way to gracefully return an | |
6224 | error. So cheat. We know that string[-1] can be safely | |
34814b9f AM |
6225 | accessed; It's either a string in an ELF string table, |
6226 | or allocated in an objalloc structure. */ | |
d1329ca3 | 6227 | |
34814b9f | 6228 | p = eh->elf.root.root.string - 1; |
d1329ca3 AM |
6229 | save = *p; |
6230 | *(char *) p = '.'; | |
34814b9f | 6231 | fh = (struct ppc_link_hash_entry *) |
b8ac2841 | 6232 | elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE); |
d1329ca3 AM |
6233 | *(char *) p = save; |
6234 | ||
6235 | /* Unfortunately, if it so happens that the string we were | |
6236 | looking for was allocated immediately before this string, | |
6237 | then we overwrote the string terminator. That's the only | |
6238 | reason the lookup should fail. */ | |
6239 | if (fh == NULL) | |
6240 | { | |
34814b9f AM |
6241 | q = eh->elf.root.root.string + strlen (eh->elf.root.root.string); |
6242 | while (q >= eh->elf.root.root.string && *q == *p) | |
d1329ca3 | 6243 | --q, --p; |
34814b9f AM |
6244 | if (q < eh->elf.root.root.string && *p == '.') |
6245 | fh = (struct ppc_link_hash_entry *) | |
b8ac2841 | 6246 | elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE); |
d1329ca3 AM |
6247 | } |
6248 | if (fh != NULL) | |
6249 | { | |
34814b9f AM |
6250 | eh->oh = fh; |
6251 | fh->oh = eh; | |
d1329ca3 AM |
6252 | } |
6253 | } | |
e86ce104 | 6254 | if (fh != NULL) |
34814b9f | 6255 | _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); |
e86ce104 AM |
6256 | } |
6257 | } | |
6258 | ||
411e1bfb | 6259 | static bfd_boolean |
8843416a AM |
6260 | get_sym_h (struct elf_link_hash_entry **hp, |
6261 | Elf_Internal_Sym **symp, | |
6262 | asection **symsecp, | |
f961d9dd | 6263 | unsigned char **tls_maskp, |
8843416a AM |
6264 | Elf_Internal_Sym **locsymsp, |
6265 | unsigned long r_symndx, | |
6266 | bfd *ibfd) | |
411e1bfb | 6267 | { |
0ffa91dd | 6268 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); |
411e1bfb AM |
6269 | |
6270 | if (r_symndx >= symtab_hdr->sh_info) | |
6271 | { | |
6272 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); | |
6273 | struct elf_link_hash_entry *h; | |
6274 | ||
6275 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
b31867b6 | 6276 | h = elf_follow_link (h); |
411e1bfb AM |
6277 | |
6278 | if (hp != NULL) | |
6279 | *hp = h; | |
6280 | ||
6281 | if (symp != NULL) | |
6282 | *symp = NULL; | |
6283 | ||
6284 | if (symsecp != NULL) | |
6285 | { | |
6286 | asection *symsec = NULL; | |
6287 | if (h->root.type == bfd_link_hash_defined | |
6288 | || h->root.type == bfd_link_hash_defweak) | |
6289 | symsec = h->root.u.def.section; | |
6290 | *symsecp = symsec; | |
6291 | } | |
6292 | ||
e7b938ca | 6293 | if (tls_maskp != NULL) |
411e1bfb AM |
6294 | { |
6295 | struct ppc_link_hash_entry *eh; | |
6296 | ||
6297 | eh = (struct ppc_link_hash_entry *) h; | |
e7b938ca | 6298 | *tls_maskp = &eh->tls_mask; |
411e1bfb AM |
6299 | } |
6300 | } | |
6301 | else | |
6302 | { | |
6303 | Elf_Internal_Sym *sym; | |
6304 | Elf_Internal_Sym *locsyms = *locsymsp; | |
6305 | ||
6306 | if (locsyms == NULL) | |
6307 | { | |
6308 | locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
6309 | if (locsyms == NULL) | |
6310 | locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, | |
6311 | symtab_hdr->sh_info, | |
6312 | 0, NULL, NULL, NULL); | |
6313 | if (locsyms == NULL) | |
6314 | return FALSE; | |
6315 | *locsymsp = locsyms; | |
6316 | } | |
6317 | sym = locsyms + r_symndx; | |
6318 | ||
6319 | if (hp != NULL) | |
6320 | *hp = NULL; | |
6321 | ||
6322 | if (symp != NULL) | |
6323 | *symp = sym; | |
6324 | ||
6325 | if (symsecp != NULL) | |
cb33740c | 6326 | *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx); |
411e1bfb | 6327 | |
e7b938ca | 6328 | if (tls_maskp != NULL) |
411e1bfb AM |
6329 | { |
6330 | struct got_entry **lgot_ents; | |
f961d9dd | 6331 | unsigned char *tls_mask; |
411e1bfb | 6332 | |
e7b938ca | 6333 | tls_mask = NULL; |
411e1bfb AM |
6334 | lgot_ents = elf_local_got_ents (ibfd); |
6335 | if (lgot_ents != NULL) | |
6336 | { | |
e054468f AM |
6337 | struct plt_entry **local_plt = (struct plt_entry **) |
6338 | (lgot_ents + symtab_hdr->sh_info); | |
f961d9dd | 6339 | unsigned char *lgot_masks = (unsigned char *) |
e054468f | 6340 | (local_plt + symtab_hdr->sh_info); |
e7b938ca | 6341 | tls_mask = &lgot_masks[r_symndx]; |
411e1bfb | 6342 | } |
e7b938ca | 6343 | *tls_maskp = tls_mask; |
411e1bfb AM |
6344 | } |
6345 | } | |
6346 | return TRUE; | |
6347 | } | |
6348 | ||
e7b938ca | 6349 | /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on |
951fd09b | 6350 | error, 2 on a toc GD type suitable for optimization, 3 on a toc LD |
ad8e1ba5 | 6351 | type suitable for optimization, and 1 otherwise. */ |
951fd09b AM |
6352 | |
6353 | static int | |
f961d9dd | 6354 | get_tls_mask (unsigned char **tls_maskp, |
3a71aa26 AM |
6355 | unsigned long *toc_symndx, |
6356 | bfd_vma *toc_addend, | |
0d4792f7 | 6357 | Elf_Internal_Sym **locsymsp, |
3a71aa26 AM |
6358 | const Elf_Internal_Rela *rel, |
6359 | bfd *ibfd) | |
411e1bfb AM |
6360 | { |
6361 | unsigned long r_symndx; | |
0d4792f7 | 6362 | int next_r; |
411e1bfb AM |
6363 | struct elf_link_hash_entry *h; |
6364 | Elf_Internal_Sym *sym; | |
6365 | asection *sec; | |
6366 | bfd_vma off; | |
6367 | ||
6368 | r_symndx = ELF64_R_SYM (rel->r_info); | |
e7b938ca | 6369 | if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) |
951fd09b | 6370 | return 0; |
411e1bfb | 6371 | |
37da22e5 AM |
6372 | if ((*tls_maskp != NULL |
6373 | && (**tls_maskp & TLS_TLS) != 0 | |
6374 | && **tls_maskp != (TLS_TLS | TLS_MARK)) | |
411e1bfb | 6375 | || sec == NULL |
6bee8834 | 6376 | || ppc64_elf_section_data (sec) == NULL |
7c8fe5c4 | 6377 | || ppc64_elf_section_data (sec)->sec_type != sec_toc) |
951fd09b | 6378 | return 1; |
411e1bfb AM |
6379 | |
6380 | /* Look inside a TOC section too. */ | |
6381 | if (h != NULL) | |
6382 | { | |
6383 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); | |
6384 | off = h->root.u.def.value; | |
6385 | } | |
6386 | else | |
6387 | off = sym->st_value; | |
6388 | off += rel->r_addend; | |
6389 | BFD_ASSERT (off % 8 == 0); | |
3a71aa26 AM |
6390 | r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8]; |
6391 | next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1]; | |
0d4792f7 AM |
6392 | if (toc_symndx != NULL) |
6393 | *toc_symndx = r_symndx; | |
3a71aa26 AM |
6394 | if (toc_addend != NULL) |
6395 | *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8]; | |
6396 | if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) | |
6397 | return 0; | |
854b41e7 | 6398 | if ((h == NULL || is_static_defined (h)) |
0d4792f7 AM |
6399 | && (next_r == -1 || next_r == -2)) |
6400 | return 1 - next_r; | |
951fd09b | 6401 | return 1; |
411e1bfb AM |
6402 | } |
6403 | ||
3b421ab3 AM |
6404 | /* Find (or create) an entry in the tocsave hash table. */ |
6405 | ||
6406 | static struct tocsave_entry * | |
6407 | tocsave_find (struct ppc_link_hash_table *htab, | |
6408 | enum insert_option insert, | |
6409 | Elf_Internal_Sym **local_syms, | |
6410 | const Elf_Internal_Rela *irela, | |
6411 | bfd *ibfd) | |
6412 | { | |
6413 | unsigned long r_indx; | |
6414 | struct elf_link_hash_entry *h; | |
6415 | Elf_Internal_Sym *sym; | |
6416 | struct tocsave_entry ent, *p; | |
6417 | hashval_t hash; | |
6418 | struct tocsave_entry **slot; | |
6419 | ||
6420 | r_indx = ELF64_R_SYM (irela->r_info); | |
6421 | if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd)) | |
6422 | return NULL; | |
6423 | if (ent.sec == NULL || ent.sec->output_section == NULL) | |
6424 | { | |
4eca0228 | 6425 | _bfd_error_handler |
871b3ab2 | 6426 | (_("%pB: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd); |
3b421ab3 AM |
6427 | return NULL; |
6428 | } | |
6429 | ||
6430 | if (h != NULL) | |
6431 | ent.offset = h->root.u.def.value; | |
6432 | else | |
6433 | ent.offset = sym->st_value; | |
6434 | ent.offset += irela->r_addend; | |
6435 | ||
6436 | hash = tocsave_htab_hash (&ent); | |
6437 | slot = ((struct tocsave_entry **) | |
6438 | htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert)); | |
6439 | if (slot == NULL) | |
6440 | return NULL; | |
6441 | ||
6442 | if (*slot == NULL) | |
6443 | { | |
6444 | p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p)); | |
6445 | if (p == NULL) | |
6446 | return NULL; | |
6447 | *p = ent; | |
6448 | *slot = p; | |
6449 | } | |
6450 | return *slot; | |
6451 | } | |
6452 | ||
754021d0 | 6453 | /* Adjust all global syms defined in opd sections. In gcc generated |
8387904d | 6454 | code for the old ABI, these will already have been done. */ |
754021d0 AM |
6455 | |
6456 | static bfd_boolean | |
6457 | adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) | |
6458 | { | |
6459 | struct ppc_link_hash_entry *eh; | |
6460 | asection *sym_sec; | |
74f0fb50 | 6461 | struct _opd_sec_data *opd; |
754021d0 AM |
6462 | |
6463 | if (h->root.type == bfd_link_hash_indirect) | |
6464 | return TRUE; | |
6465 | ||
754021d0 AM |
6466 | if (h->root.type != bfd_link_hash_defined |
6467 | && h->root.type != bfd_link_hash_defweak) | |
6468 | return TRUE; | |
6469 | ||
6470 | eh = (struct ppc_link_hash_entry *) h; | |
6471 | if (eh->adjust_done) | |
6472 | return TRUE; | |
6473 | ||
6474 | sym_sec = eh->elf.root.u.def.section; | |
74f0fb50 AM |
6475 | opd = get_opd_info (sym_sec); |
6476 | if (opd != NULL && opd->adjust != NULL) | |
754021d0 | 6477 | { |
51aecdc5 | 6478 | long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)]; |
4025353c AM |
6479 | if (adjust == -1) |
6480 | { | |
6481 | /* This entry has been deleted. */ | |
b3fac117 | 6482 | asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section; |
81688140 AM |
6483 | if (dsec == NULL) |
6484 | { | |
6485 | for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next) | |
dbaa2011 | 6486 | if (discarded_section (dsec)) |
81688140 | 6487 | { |
b3fac117 | 6488 | ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec; |
81688140 AM |
6489 | break; |
6490 | } | |
6491 | } | |
4025353c | 6492 | eh->elf.root.u.def.value = 0; |
81688140 | 6493 | eh->elf.root.u.def.section = dsec; |
4025353c AM |
6494 | } |
6495 | else | |
6496 | eh->elf.root.u.def.value += adjust; | |
754021d0 AM |
6497 | eh->adjust_done = 1; |
6498 | } | |
6499 | return TRUE; | |
6500 | } | |
6501 | ||
8c1d1bb8 | 6502 | /* Handles decrementing dynamic reloc counts for the reloc specified by |
19e08130 | 6503 | R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM |
8c1d1bb8 AM |
6504 | have already been determined. */ |
6505 | ||
6506 | static bfd_boolean | |
6507 | dec_dynrel_count (bfd_vma r_info, | |
6508 | asection *sec, | |
6509 | struct bfd_link_info *info, | |
6510 | Elf_Internal_Sym **local_syms, | |
6511 | struct elf_link_hash_entry *h, | |
19e08130 | 6512 | Elf_Internal_Sym *sym) |
8c1d1bb8 AM |
6513 | { |
6514 | enum elf_ppc64_reloc_type r_type; | |
19e08130 | 6515 | asection *sym_sec = NULL; |
8c1d1bb8 AM |
6516 | |
6517 | /* Can this reloc be dynamic? This switch, and later tests here | |
6518 | should be kept in sync with the code in check_relocs. */ | |
6519 | r_type = ELF64_R_TYPE (r_info); | |
6520 | switch (r_type) | |
6521 | { | |
6522 | default: | |
6523 | return TRUE; | |
6524 | ||
6525 | case R_PPC64_TPREL16: | |
6526 | case R_PPC64_TPREL16_LO: | |
6527 | case R_PPC64_TPREL16_HI: | |
6528 | case R_PPC64_TPREL16_HA: | |
6529 | case R_PPC64_TPREL16_DS: | |
6530 | case R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
6531 | case R_PPC64_TPREL16_HIGH: |
6532 | case R_PPC64_TPREL16_HIGHA: | |
8c1d1bb8 AM |
6533 | case R_PPC64_TPREL16_HIGHER: |
6534 | case R_PPC64_TPREL16_HIGHERA: | |
6535 | case R_PPC64_TPREL16_HIGHEST: | |
6536 | case R_PPC64_TPREL16_HIGHESTA: | |
8c1d1bb8 AM |
6537 | case R_PPC64_TPREL64: |
6538 | case R_PPC64_DTPMOD64: | |
6539 | case R_PPC64_DTPREL64: | |
6540 | case R_PPC64_ADDR64: | |
6541 | case R_PPC64_REL30: | |
6542 | case R_PPC64_REL32: | |
6543 | case R_PPC64_REL64: | |
6544 | case R_PPC64_ADDR14: | |
6545 | case R_PPC64_ADDR14_BRNTAKEN: | |
6546 | case R_PPC64_ADDR14_BRTAKEN: | |
6547 | case R_PPC64_ADDR16: | |
6548 | case R_PPC64_ADDR16_DS: | |
6549 | case R_PPC64_ADDR16_HA: | |
6550 | case R_PPC64_ADDR16_HI: | |
f9c6b907 AM |
6551 | case R_PPC64_ADDR16_HIGH: |
6552 | case R_PPC64_ADDR16_HIGHA: | |
8c1d1bb8 AM |
6553 | case R_PPC64_ADDR16_HIGHER: |
6554 | case R_PPC64_ADDR16_HIGHERA: | |
6555 | case R_PPC64_ADDR16_HIGHEST: | |
6556 | case R_PPC64_ADDR16_HIGHESTA: | |
6557 | case R_PPC64_ADDR16_LO: | |
6558 | case R_PPC64_ADDR16_LO_DS: | |
6559 | case R_PPC64_ADDR24: | |
6560 | case R_PPC64_ADDR32: | |
6561 | case R_PPC64_UADDR16: | |
6562 | case R_PPC64_UADDR32: | |
6563 | case R_PPC64_UADDR64: | |
6564 | case R_PPC64_TOC: | |
6565 | break; | |
6566 | } | |
6567 | ||
6568 | if (local_syms != NULL) | |
6569 | { | |
6570 | unsigned long r_symndx; | |
8c1d1bb8 AM |
6571 | bfd *ibfd = sec->owner; |
6572 | ||
6573 | r_symndx = ELF64_R_SYM (r_info); | |
6574 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd)) | |
6575 | return FALSE; | |
6576 | } | |
6577 | ||
0e1862bb | 6578 | if ((bfd_link_pic (info) |
1d483afe | 6579 | && (must_be_dyn_reloc (info, r_type) |
8c1d1bb8 | 6580 | || (h != NULL |
198f1157 | 6581 | && (!SYMBOLIC_BIND (info, h) |
8c1d1bb8 AM |
6582 | || h->root.type == bfd_link_hash_defweak |
6583 | || !h->def_regular)))) | |
6584 | || (ELIMINATE_COPY_RELOCS | |
0e1862bb | 6585 | && !bfd_link_pic (info) |
8c1d1bb8 AM |
6586 | && h != NULL |
6587 | && (h->root.type == bfd_link_hash_defweak | |
6588 | || !h->def_regular))) | |
6589 | ; | |
6590 | else | |
6591 | return TRUE; | |
6592 | ||
6593 | if (h != NULL) | |
6edfbbad | 6594 | { |
19e08130 AM |
6595 | struct elf_dyn_relocs *p; |
6596 | struct elf_dyn_relocs **pp; | |
6597 | pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs; | |
6598 | ||
6599 | /* elf_gc_sweep may have already removed all dyn relocs associated | |
6600 | with local syms for a given section. Also, symbol flags are | |
6601 | changed by elf_gc_sweep_symbol, confusing the test above. Don't | |
6602 | report a dynreloc miscount. */ | |
6603 | if (*pp == NULL && info->gc_sections) | |
6604 | return TRUE; | |
6605 | ||
6606 | while ((p = *pp) != NULL) | |
60124e18 | 6607 | { |
19e08130 AM |
6608 | if (p->sec == sec) |
6609 | { | |
6610 | if (!must_be_dyn_reloc (info, r_type)) | |
6611 | p->pc_count -= 1; | |
6612 | p->count -= 1; | |
6613 | if (p->count == 0) | |
6614 | *pp = p->next; | |
6615 | return TRUE; | |
6616 | } | |
6617 | pp = &p->next; | |
60124e18 | 6618 | } |
6edfbbad | 6619 | } |
19e08130 AM |
6620 | else |
6621 | { | |
6622 | struct ppc_dyn_relocs *p; | |
6623 | struct ppc_dyn_relocs **pp; | |
6624 | void *vpp; | |
6625 | bfd_boolean is_ifunc; | |
8c1d1bb8 | 6626 | |
19e08130 AM |
6627 | if (local_syms == NULL) |
6628 | sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
6629 | if (sym_sec == NULL) | |
6630 | sym_sec = sec; | |
c57da1a7 | 6631 | |
19e08130 AM |
6632 | vpp = &elf_section_data (sym_sec)->local_dynrel; |
6633 | pp = (struct ppc_dyn_relocs **) vpp; | |
6634 | ||
6635 | if (*pp == NULL && info->gc_sections) | |
6636 | return TRUE; | |
6637 | ||
6638 | is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC; | |
6639 | while ((p = *pp) != NULL) | |
8c1d1bb8 | 6640 | { |
19e08130 AM |
6641 | if (p->sec == sec && p->ifunc == is_ifunc) |
6642 | { | |
6643 | p->count -= 1; | |
6644 | if (p->count == 0) | |
6645 | *pp = p->next; | |
6646 | return TRUE; | |
6647 | } | |
6648 | pp = &p->next; | |
8c1d1bb8 | 6649 | } |
8c1d1bb8 AM |
6650 | } |
6651 | ||
695344c0 | 6652 | /* xgettext:c-format */ |
cf97bcb0 AM |
6653 | _bfd_error_handler (_("dynreloc miscount for %pB, section %pA"), |
6654 | sec->owner, sec); | |
8c1d1bb8 AM |
6655 | bfd_set_error (bfd_error_bad_value); |
6656 | return FALSE; | |
6657 | } | |
6658 | ||
754021d0 AM |
6659 | /* Remove unused Official Procedure Descriptor entries. Currently we |
6660 | only remove those associated with functions in discarded link-once | |
6661 | sections, or weakly defined functions that have been overridden. It | |
6662 | would be possible to remove many more entries for statically linked | |
6663 | applications. */ | |
6664 | ||
b34976b6 | 6665 | bfd_boolean |
e7d1c40c | 6666 | ppc64_elf_edit_opd (struct bfd_link_info *info) |
1e2f5b6e AM |
6667 | { |
6668 | bfd *ibfd; | |
754021d0 | 6669 | bfd_boolean some_edited = FALSE; |
3f764659 | 6670 | asection *need_pad = NULL; |
e7d1c40c AM |
6671 | struct ppc_link_hash_table *htab; |
6672 | ||
6673 | htab = ppc_hash_table (info); | |
6674 | if (htab == NULL) | |
6675 | return FALSE; | |
1e2f5b6e | 6676 | |
c72f2fb2 | 6677 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
1e2f5b6e AM |
6678 | { |
6679 | asection *sec; | |
6680 | Elf_Internal_Rela *relstart, *rel, *relend; | |
6681 | Elf_Internal_Shdr *symtab_hdr; | |
6cdc0ccc | 6682 | Elf_Internal_Sym *local_syms; |
74f0fb50 | 6683 | struct _opd_sec_data *opd; |
51aecdc5 | 6684 | bfd_boolean need_edit, add_aux_fields, broken; |
3f764659 | 6685 | bfd_size_type cnt_16b = 0; |
1e2f5b6e | 6686 | |
854b41e7 AM |
6687 | if (!is_ppc64_elf (ibfd)) |
6688 | continue; | |
6689 | ||
1e2f5b6e | 6690 | sec = bfd_get_section_by_name (ibfd, ".opd"); |
46de2a7c | 6691 | if (sec == NULL || sec->size == 0) |
1e2f5b6e AM |
6692 | continue; |
6693 | ||
dbaa2011 | 6694 | if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) |
4b85d634 AM |
6695 | continue; |
6696 | ||
1e2f5b6e AM |
6697 | if (sec->output_section == bfd_abs_section_ptr) |
6698 | continue; | |
6699 | ||
6700 | /* Look through the section relocs. */ | |
6701 | if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0) | |
6702 | continue; | |
6703 | ||
6cdc0ccc | 6704 | local_syms = NULL; |
0ffa91dd | 6705 | symtab_hdr = &elf_symtab_hdr (ibfd); |
1e2f5b6e AM |
6706 | |
6707 | /* Read the relocations. */ | |
4ce794b7 | 6708 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
45d6a902 | 6709 | info->keep_memory); |
1e2f5b6e | 6710 | if (relstart == NULL) |
b34976b6 | 6711 | return FALSE; |
1e2f5b6e AM |
6712 | |
6713 | /* First run through the relocs to check they are sane, and to | |
6714 | determine whether we need to edit this opd section. */ | |
b34976b6 | 6715 | need_edit = FALSE; |
51aecdc5 | 6716 | broken = FALSE; |
3f764659 | 6717 | need_pad = sec; |
1e2f5b6e | 6718 | relend = relstart + sec->reloc_count; |
50bc7936 | 6719 | for (rel = relstart; rel < relend; ) |
1e2f5b6e | 6720 | { |
04c9666a | 6721 | enum elf_ppc64_reloc_type r_type; |
1e2f5b6e AM |
6722 | unsigned long r_symndx; |
6723 | asection *sym_sec; | |
6724 | struct elf_link_hash_entry *h; | |
6725 | Elf_Internal_Sym *sym; | |
51aecdc5 | 6726 | bfd_vma offset; |
1e2f5b6e | 6727 | |
51aecdc5 | 6728 | /* .opd contains an array of 16 or 24 byte entries. We're |
1e2f5b6e AM |
6729 | only interested in the reloc pointing to a function entry |
6730 | point. */ | |
51aecdc5 AM |
6731 | offset = rel->r_offset; |
6732 | if (rel + 1 == relend | |
6733 | || rel[1].r_offset != offset + 8) | |
1e2f5b6e AM |
6734 | { |
6735 | /* If someone messes with .opd alignment then after a | |
6736 | "ld -r" we might have padding in the middle of .opd. | |
6737 | Also, there's nothing to prevent someone putting | |
6738 | something silly in .opd with the assembler. No .opd | |
b34976b6 | 6739 | optimization for them! */ |
3f764659 | 6740 | broken_opd: |
4eca0228 | 6741 | _bfd_error_handler |
871b3ab2 | 6742 | (_("%pB: .opd is not a regular array of opd entries"), ibfd); |
51aecdc5 | 6743 | broken = TRUE; |
1e2f5b6e AM |
6744 | break; |
6745 | } | |
6746 | ||
50bc7936 AM |
6747 | if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64 |
6748 | || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC) | |
6749 | { | |
4eca0228 | 6750 | _bfd_error_handler |
695344c0 | 6751 | /* xgettext:c-format */ |
871b3ab2 | 6752 | (_("%pB: unexpected reloc type %u in .opd section"), |
d003868e | 6753 | ibfd, r_type); |
51aecdc5 | 6754 | broken = TRUE; |
50bc7936 AM |
6755 | break; |
6756 | } | |
6757 | ||
1e2f5b6e | 6758 | r_symndx = ELF64_R_SYM (rel->r_info); |
411e1bfb AM |
6759 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
6760 | r_symndx, ibfd)) | |
50bc7936 | 6761 | goto error_ret; |
1e2f5b6e AM |
6762 | |
6763 | if (sym_sec == NULL || sym_sec->owner == NULL) | |
6764 | { | |
411e1bfb AM |
6765 | const char *sym_name; |
6766 | if (h != NULL) | |
6767 | sym_name = h->root.root.string; | |
6768 | else | |
26c61ae5 L |
6769 | sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym, |
6770 | sym_sec); | |
411e1bfb | 6771 | |
4eca0228 | 6772 | _bfd_error_handler |
695344c0 | 6773 | /* xgettext:c-format */ |
871b3ab2 | 6774 | (_("%pB: undefined sym `%s' in .opd section"), |
d003868e | 6775 | ibfd, sym_name); |
51aecdc5 | 6776 | broken = TRUE; |
1e2f5b6e AM |
6777 | break; |
6778 | } | |
6779 | ||
51020317 AM |
6780 | /* opd entries are always for functions defined in the |
6781 | current input bfd. If the symbol isn't defined in the | |
6782 | input bfd, then we won't be using the function in this | |
6783 | bfd; It must be defined in a linkonce section in another | |
6784 | bfd, or is weak. It's also possible that we are | |
6785 | discarding the function due to a linker script /DISCARD/, | |
6786 | which we test for via the output_section. */ | |
6787 | if (sym_sec->owner != ibfd | |
6788 | || sym_sec->output_section == bfd_abs_section_ptr) | |
b34976b6 | 6789 | need_edit = TRUE; |
1e2f5b6e | 6790 | |
50bc7936 | 6791 | rel += 2; |
51aecdc5 AM |
6792 | if (rel + 1 == relend |
6793 | || (rel + 2 < relend | |
6794 | && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)) | |
6795 | ++rel; | |
6796 | ||
6797 | if (rel == relend) | |
3f764659 JJ |
6798 | { |
6799 | if (sec->size == offset + 24) | |
6800 | { | |
6801 | need_pad = NULL; | |
6802 | break; | |
6803 | } | |
51aecdc5 | 6804 | if (sec->size == offset + 16) |
3f764659 JJ |
6805 | { |
6806 | cnt_16b++; | |
6807 | break; | |
6808 | } | |
6809 | goto broken_opd; | |
6810 | } | |
3f764659 JJ |
6811 | else if (rel + 1 < relend |
6812 | && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64 | |
6813 | && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC) | |
6814 | { | |
51aecdc5 AM |
6815 | if (rel[0].r_offset == offset + 16) |
6816 | cnt_16b++; | |
6817 | else if (rel[0].r_offset != offset + 24) | |
6818 | goto broken_opd; | |
3f764659 JJ |
6819 | } |
6820 | else | |
6821 | goto broken_opd; | |
1e2f5b6e AM |
6822 | } |
6823 | ||
e7d1c40c | 6824 | add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0; |
3f764659 | 6825 | |
51aecdc5 | 6826 | if (!broken && (need_edit || add_aux_fields)) |
1e2f5b6e AM |
6827 | { |
6828 | Elf_Internal_Rela *write_rel; | |
d4730f92 | 6829 | Elf_Internal_Shdr *rel_hdr; |
1e2f5b6e | 6830 | bfd_byte *rptr, *wptr; |
983bddc8 | 6831 | bfd_byte *new_contents; |
74f0fb50 AM |
6832 | bfd_size_type amt; |
6833 | ||
983bddc8 | 6834 | new_contents = NULL; |
51aecdc5 | 6835 | amt = OPD_NDX (sec->size) * sizeof (long); |
74f0fb50 | 6836 | opd = &ppc64_elf_section_data (sec)->u.opd; |
33c0ec9d | 6837 | opd->adjust = bfd_zalloc (sec->owner, amt); |
74f0fb50 AM |
6838 | if (opd->adjust == NULL) |
6839 | return FALSE; | |
1e2f5b6e AM |
6840 | |
6841 | /* This seems a waste of time as input .opd sections are all | |
6842 | zeros as generated by gcc, but I suppose there's no reason | |
6843 | this will always be so. We might start putting something in | |
6844 | the third word of .opd entries. */ | |
6845 | if ((sec->flags & SEC_IN_MEMORY) == 0) | |
6846 | { | |
eea6121a AM |
6847 | bfd_byte *loc; |
6848 | if (!bfd_malloc_and_get_section (ibfd, sec, &loc)) | |
6cdc0ccc | 6849 | { |
eea6121a AM |
6850 | if (loc != NULL) |
6851 | free (loc); | |
50bc7936 | 6852 | error_ret: |
6cdc0ccc AM |
6853 | if (local_syms != NULL |
6854 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
6855 | free (local_syms); | |
6cdc0ccc AM |
6856 | if (elf_section_data (sec)->relocs != relstart) |
6857 | free (relstart); | |
b34976b6 | 6858 | return FALSE; |
6cdc0ccc | 6859 | } |
1e2f5b6e AM |
6860 | sec->contents = loc; |
6861 | sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); | |
6862 | } | |
6863 | ||
6864 | elf_section_data (sec)->relocs = relstart; | |
6865 | ||
3f764659 | 6866 | new_contents = sec->contents; |
3f764659 JJ |
6867 | if (add_aux_fields) |
6868 | { | |
6869 | new_contents = bfd_malloc (sec->size + cnt_16b * 8); | |
6870 | if (new_contents == NULL) | |
6871 | return FALSE; | |
51aecdc5 | 6872 | need_pad = NULL; |
3f764659 | 6873 | } |
b4f4e59f AM |
6874 | wptr = new_contents; |
6875 | rptr = sec->contents; | |
1e2f5b6e | 6876 | write_rel = relstart; |
51aecdc5 | 6877 | for (rel = relstart; rel < relend; ) |
1e2f5b6e | 6878 | { |
50bc7936 AM |
6879 | unsigned long r_symndx; |
6880 | asection *sym_sec; | |
6881 | struct elf_link_hash_entry *h; | |
51aecdc5 | 6882 | struct ppc_link_hash_entry *fdh = NULL; |
50bc7936 | 6883 | Elf_Internal_Sym *sym; |
51aecdc5 AM |
6884 | long opd_ent_size; |
6885 | Elf_Internal_Rela *next_rel; | |
6886 | bfd_boolean skip; | |
50bc7936 AM |
6887 | |
6888 | r_symndx = ELF64_R_SYM (rel->r_info); | |
6889 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, | |
d37c89e5 | 6890 | r_symndx, ibfd)) |
50bc7936 AM |
6891 | goto error_ret; |
6892 | ||
51aecdc5 AM |
6893 | next_rel = rel + 2; |
6894 | if (next_rel + 1 == relend | |
6895 | || (next_rel + 2 < relend | |
6896 | && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC)) | |
6897 | ++next_rel; | |
6898 | ||
6899 | /* See if the .opd entry is full 24 byte or | |
6900 | 16 byte (with fd_aux entry overlapped with next | |
6901 | fd_func). */ | |
6902 | opd_ent_size = 24; | |
6903 | if (next_rel == relend) | |
1e2f5b6e | 6904 | { |
51aecdc5 | 6905 | if (sec->size == rel->r_offset + 16) |
3f764659 | 6906 | opd_ent_size = 16; |
51aecdc5 AM |
6907 | } |
6908 | else if (next_rel->r_offset == rel->r_offset + 16) | |
6909 | opd_ent_size = 16; | |
3f764659 | 6910 | |
51aecdc5 AM |
6911 | if (h != NULL |
6912 | && h->root.root.string[0] == '.') | |
6913 | { | |
8c5b4e52 AM |
6914 | fdh = ((struct ppc_link_hash_entry *) h)->oh; |
6915 | if (fdh != NULL) | |
6916 | { | |
6917 | fdh = ppc_follow_link (fdh); | |
6918 | if (fdh->elf.root.type != bfd_link_hash_defined | |
6919 | && fdh->elf.root.type != bfd_link_hash_defweak) | |
6920 | fdh = NULL; | |
6921 | } | |
51aecdc5 | 6922 | } |
1e2f5b6e | 6923 | |
51aecdc5 AM |
6924 | skip = (sym_sec->owner != ibfd |
6925 | || sym_sec->output_section == bfd_abs_section_ptr); | |
6926 | if (skip) | |
6927 | { | |
6928 | if (fdh != NULL && sym_sec->owner == ibfd) | |
a4aa0fb7 | 6929 | { |
51aecdc5 AM |
6930 | /* Arrange for the function descriptor sym |
6931 | to be dropped. */ | |
6932 | fdh->elf.root.u.def.value = 0; | |
6933 | fdh->elf.root.u.def.section = sym_sec; | |
a4aa0fb7 | 6934 | } |
51aecdc5 | 6935 | opd->adjust[OPD_NDX (rel->r_offset)] = -1; |
1e2f5b6e | 6936 | |
0e1862bb | 6937 | if (NO_OPD_RELOCS || bfd_link_relocatable (info)) |
51aecdc5 AM |
6938 | rel = next_rel; |
6939 | else | |
6940 | while (1) | |
6941 | { | |
6942 | if (!dec_dynrel_count (rel->r_info, sec, info, | |
6943 | NULL, h, sym)) | |
6944 | goto error_ret; | |
754021d0 | 6945 | |
51aecdc5 AM |
6946 | if (++rel == next_rel) |
6947 | break; | |
1e2f5b6e | 6948 | |
51aecdc5 AM |
6949 | r_symndx = ELF64_R_SYM (rel->r_info); |
6950 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, | |
6951 | r_symndx, ibfd)) | |
6952 | goto error_ret; | |
6953 | } | |
50bc7936 AM |
6954 | } |
6955 | else | |
1e2f5b6e | 6956 | { |
51aecdc5 AM |
6957 | /* We'll be keeping this opd entry. */ |
6958 | long adjust; | |
6959 | ||
6960 | if (fdh != NULL) | |
6961 | { | |
6962 | /* Redefine the function descriptor symbol to | |
6963 | this location in the opd section. It is | |
6964 | necessary to update the value here rather | |
6965 | than using an array of adjustments as we do | |
6966 | for local symbols, because various places | |
6967 | in the generic ELF code use the value | |
6968 | stored in u.def.value. */ | |
6969 | fdh->elf.root.u.def.value = wptr - new_contents; | |
6970 | fdh->adjust_done = 1; | |
6971 | } | |
6972 | ||
6973 | /* Local syms are a bit tricky. We could | |
6974 | tweak them as they can be cached, but | |
6975 | we'd need to look through the local syms | |
6976 | for the function descriptor sym which we | |
6977 | don't have at the moment. So keep an | |
6978 | array of adjustments. */ | |
6979 | adjust = (wptr - new_contents) - (rptr - sec->contents); | |
6980 | opd->adjust[OPD_NDX (rel->r_offset)] = adjust; | |
6981 | ||
6982 | if (wptr != rptr) | |
6983 | memcpy (wptr, rptr, opd_ent_size); | |
6984 | wptr += opd_ent_size; | |
6985 | if (add_aux_fields && opd_ent_size == 16) | |
6986 | { | |
6987 | memset (wptr, '\0', 8); | |
6988 | wptr += 8; | |
6989 | } | |
6990 | ||
50bc7936 | 6991 | /* We need to adjust any reloc offsets to point to the |
51aecdc5 AM |
6992 | new opd entries. */ |
6993 | for ( ; rel != next_rel; ++rel) | |
6994 | { | |
6995 | rel->r_offset += adjust; | |
6996 | if (write_rel != rel) | |
6997 | memcpy (write_rel, rel, sizeof (*rel)); | |
6998 | ++write_rel; | |
6999 | } | |
1e2f5b6e | 7000 | } |
51aecdc5 AM |
7001 | |
7002 | rptr += opd_ent_size; | |
1e2f5b6e AM |
7003 | } |
7004 | ||
3f764659 | 7005 | sec->size = wptr - new_contents; |
1e2f5b6e | 7006 | sec->reloc_count = write_rel - relstart; |
3f764659 JJ |
7007 | if (add_aux_fields) |
7008 | { | |
7009 | free (sec->contents); | |
7010 | sec->contents = new_contents; | |
7011 | } | |
7012 | ||
05bf9422 | 7013 | /* Fudge the header size too, as this is used later in |
cdcf6e38 | 7014 | elf_bfd_final_link if we are emitting relocs. */ |
d4730f92 BS |
7015 | rel_hdr = _bfd_elf_single_rel_hdr (sec); |
7016 | rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize; | |
754021d0 | 7017 | some_edited = TRUE; |
1e2f5b6e | 7018 | } |
6cdc0ccc | 7019 | else if (elf_section_data (sec)->relocs != relstart) |
1e2f5b6e | 7020 | free (relstart); |
6cdc0ccc | 7021 | |
411e1bfb AM |
7022 | if (local_syms != NULL |
7023 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
7024 | { | |
7025 | if (!info->keep_memory) | |
7026 | free (local_syms); | |
7027 | else | |
7028 | symtab_hdr->contents = (unsigned char *) local_syms; | |
7029 | } | |
7030 | } | |
7031 | ||
754021d0 AM |
7032 | if (some_edited) |
7033 | elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL); | |
7034 | ||
3f764659 JJ |
7035 | /* If we are doing a final link and the last .opd entry is just 16 byte |
7036 | long, add a 8 byte padding after it. */ | |
0e1862bb | 7037 | if (need_pad != NULL && !bfd_link_relocatable (info)) |
3f764659 JJ |
7038 | { |
7039 | bfd_byte *p; | |
7040 | ||
7041 | if ((need_pad->flags & SEC_IN_MEMORY) == 0) | |
7042 | { | |
7043 | BFD_ASSERT (need_pad->size > 0); | |
7044 | ||
7045 | p = bfd_malloc (need_pad->size + 8); | |
7046 | if (p == NULL) | |
7047 | return FALSE; | |
699733f6 | 7048 | |
2cdcc330 AM |
7049 | if (!bfd_get_section_contents (need_pad->owner, need_pad, |
7050 | p, 0, need_pad->size)) | |
3f764659 JJ |
7051 | return FALSE; |
7052 | ||
7053 | need_pad->contents = p; | |
7054 | need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); | |
7055 | } | |
7056 | else | |
7057 | { | |
7058 | p = bfd_realloc (need_pad->contents, need_pad->size + 8); | |
7059 | if (p == NULL) | |
7060 | return FALSE; | |
7061 | ||
7062 | need_pad->contents = p; | |
7063 | } | |
7064 | ||
7065 | memset (need_pad->contents + need_pad->size, 0, 8); | |
7066 | need_pad->size += 8; | |
7067 | } | |
7068 | ||
411e1bfb AM |
7069 | return TRUE; |
7070 | } | |
7071 | ||
3e04d765 AM |
7072 | /* Analyze inline PLT call relocations to see whether calls to locally |
7073 | defined functions can be converted to direct calls. */ | |
7074 | ||
7075 | bfd_boolean | |
7076 | ppc64_elf_inline_plt (struct bfd_link_info *info) | |
7077 | { | |
7078 | struct ppc_link_hash_table *htab; | |
7079 | bfd *ibfd; | |
7080 | asection *sec; | |
7081 | bfd_vma low_vma, high_vma, limit; | |
7082 | ||
7083 | htab = ppc_hash_table (info); | |
7084 | if (htab == NULL) | |
7085 | return FALSE; | |
7086 | ||
7087 | /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is | |
7088 | reduced somewhat to cater for possible stubs that might be added | |
7089 | between the call and its destination. */ | |
7090 | if (htab->params->group_size < 0) | |
7091 | { | |
7092 | limit = -htab->params->group_size; | |
7093 | if (limit == 1) | |
7094 | limit = 0x1e00000; | |
7095 | } | |
7096 | else | |
7097 | { | |
7098 | limit = htab->params->group_size; | |
7099 | if (limit == 1) | |
7100 | limit = 0x1c00000; | |
7101 | } | |
7102 | ||
7103 | low_vma = -1; | |
7104 | high_vma = 0; | |
7105 | for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next) | |
7106 | if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE)) | |
7107 | { | |
7108 | if (low_vma > sec->vma) | |
7109 | low_vma = sec->vma; | |
7110 | if (high_vma < sec->vma + sec->size) | |
7111 | high_vma = sec->vma + sec->size; | |
7112 | } | |
7113 | ||
7114 | /* If a "bl" can reach anywhere in local code sections, then we can | |
7115 | convert all inline PLT sequences to direct calls when the symbol | |
7116 | is local. */ | |
7117 | if (high_vma - low_vma < limit) | |
7118 | { | |
7119 | htab->can_convert_all_inline_plt = 1; | |
7120 | return TRUE; | |
7121 | } | |
7122 | ||
7123 | /* Otherwise, go looking through relocs for cases where a direct | |
7124 | call won't reach. Mark the symbol on any such reloc to disable | |
7125 | the optimization and keep the PLT entry as it seems likely that | |
7126 | this will be better than creating trampolines. Note that this | |
7127 | will disable the optimization for all inline PLT calls to a | |
7128 | particular symbol, not just those that won't reach. The | |
7129 | difficulty in doing a more precise optimization is that the | |
7130 | linker needs to make a decision depending on whether a | |
7131 | particular R_PPC64_PLTCALL insn can be turned into a direct | |
7132 | call, for each of the R_PPC64_PLTSEQ and R_PPC64_PLT16* insns in | |
7133 | the sequence, and there is nothing that ties those relocs | |
7134 | together except their symbol. */ | |
7135 | ||
7136 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
7137 | { | |
7138 | Elf_Internal_Shdr *symtab_hdr; | |
7139 | Elf_Internal_Sym *local_syms; | |
7140 | ||
7141 | if (!is_ppc64_elf (ibfd)) | |
7142 | continue; | |
7143 | ||
7144 | local_syms = NULL; | |
7145 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
7146 | ||
7147 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
7148 | if (ppc64_elf_section_data (sec)->has_pltcall | |
7149 | && !bfd_is_abs_section (sec->output_section)) | |
7150 | { | |
7151 | Elf_Internal_Rela *relstart, *rel, *relend; | |
7152 | ||
7153 | /* Read the relocations. */ | |
7154 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, | |
7155 | info->keep_memory); | |
7156 | if (relstart == NULL) | |
7157 | return FALSE; | |
7158 | ||
7159 | relend = relstart + sec->reloc_count; | |
7160 | for (rel = relstart; rel < relend; ) | |
7161 | { | |
7162 | enum elf_ppc64_reloc_type r_type; | |
7163 | unsigned long r_symndx; | |
7164 | asection *sym_sec; | |
7165 | struct elf_link_hash_entry *h; | |
7166 | Elf_Internal_Sym *sym; | |
7167 | unsigned char *tls_maskp; | |
7168 | ||
7169 | r_type = ELF64_R_TYPE (rel->r_info); | |
7170 | if (r_type != R_PPC64_PLTCALL) | |
7171 | continue; | |
7172 | ||
7173 | r_symndx = ELF64_R_SYM (rel->r_info); | |
7174 | if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms, | |
7175 | r_symndx, ibfd)) | |
7176 | { | |
7177 | if (elf_section_data (sec)->relocs != relstart) | |
7178 | free (relstart); | |
7179 | if (local_syms != NULL | |
2cdcc330 | 7180 | && symtab_hdr->contents != (bfd_byte *) local_syms) |
3e04d765 AM |
7181 | free (local_syms); |
7182 | return FALSE; | |
7183 | } | |
7184 | ||
7185 | if (sym_sec != NULL && sym_sec->output_section != NULL) | |
7186 | { | |
7187 | bfd_vma from, to; | |
7188 | if (h != NULL) | |
7189 | to = h->root.u.def.value; | |
7190 | else | |
7191 | to = sym->st_value; | |
7192 | to += (rel->r_addend | |
7193 | + sym_sec->output_offset | |
7194 | + sym_sec->output_section->vma); | |
7195 | from = (rel->r_offset | |
7196 | + sec->output_offset | |
7197 | + sec->output_section->vma); | |
7198 | if (to - from + limit < 2 * limit) | |
7199 | *tls_maskp &= ~PLT_KEEP; | |
7200 | } | |
7201 | } | |
7202 | if (elf_section_data (sec)->relocs != relstart) | |
7203 | free (relstart); | |
7204 | } | |
7205 | ||
7206 | if (local_syms != NULL | |
7207 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
7208 | { | |
7209 | if (!info->keep_memory) | |
7210 | free (local_syms); | |
7211 | else | |
7212 | symtab_hdr->contents = (unsigned char *) local_syms; | |
7213 | } | |
7214 | } | |
7215 | ||
7216 | return TRUE; | |
7217 | } | |
7218 | ||
e1918d23 | 7219 | /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ |
411e1bfb | 7220 | |
e1918d23 | 7221 | asection * |
e7d1c40c | 7222 | ppc64_elf_tls_setup (struct bfd_link_info *info) |
411e1bfb | 7223 | { |
411e1bfb AM |
7224 | struct ppc_link_hash_table *htab; |
7225 | ||
411e1bfb | 7226 | htab = ppc_hash_table (info); |
4dfe6ac6 NC |
7227 | if (htab == NULL) |
7228 | return NULL; | |
7229 | ||
ee67d69a AM |
7230 | if (abiversion (info->output_bfd) == 1) |
7231 | htab->opd_abi = 1; | |
7232 | ||
e7d1c40c | 7233 | if (htab->params->no_multi_toc) |
33c0ec9d AM |
7234 | htab->do_multi_toc = 0; |
7235 | else if (!htab->do_multi_toc) | |
e7d1c40c | 7236 | htab->params->no_multi_toc = 1; |
33c0ec9d | 7237 | |
8b5f1ed8 AM |
7238 | /* Default to --no-plt-localentry, as this option can cause problems |
7239 | with symbol interposition. For example, glibc libpthread.so and | |
7240 | libc.so duplicate many pthread symbols, with a fallback | |
7241 | implementation in libc.so. In some cases the fallback does more | |
7242 | work than the pthread implementation. __pthread_condattr_destroy | |
7243 | is one such symbol: the libpthread.so implementation is | |
7244 | localentry:0 while the libc.so implementation is localentry:8. | |
7245 | An app that "cleverly" uses dlopen to only load necessary | |
7246 | libraries at runtime may omit loading libpthread.so when not | |
7247 | running multi-threaded, which then results in the libc.so | |
7248 | fallback symbols being used and ld.so complaining. Now there | |
7249 | are workarounds in ld (see non_zero_localentry) to detect the | |
7250 | pthread situation, but that may not be the only case where | |
7251 | --plt-localentry can cause trouble. */ | |
f378ab09 | 7252 | if (htab->params->plt_localentry0 < 0) |
8b5f1ed8 | 7253 | htab->params->plt_localentry0 = 0; |
d44c746a AM |
7254 | if (htab->params->plt_localentry0 |
7255 | && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26", | |
7256 | FALSE, FALSE, FALSE) == NULL) | |
cf97bcb0 AM |
7257 | _bfd_error_handler |
7258 | (_("warning: --plt-localentry is especially dangerous without " | |
7259 | "ld.so support to detect ABI violations")); | |
f378ab09 | 7260 | |
3a71aa26 AM |
7261 | htab->tls_get_addr = ((struct ppc_link_hash_entry *) |
7262 | elf_link_hash_lookup (&htab->elf, ".__tls_get_addr", | |
7263 | FALSE, FALSE, TRUE)); | |
a7f2871e AM |
7264 | /* Move dynamic linking info to the function descriptor sym. */ |
7265 | if (htab->tls_get_addr != NULL) | |
7266 | func_desc_adjust (&htab->tls_get_addr->elf, info); | |
3a71aa26 AM |
7267 | htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *) |
7268 | elf_link_hash_lookup (&htab->elf, "__tls_get_addr", | |
7269 | FALSE, FALSE, TRUE)); | |
7c9cf415 | 7270 | if (htab->params->tls_get_addr_opt) |
a7f2871e AM |
7271 | { |
7272 | struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd; | |
7273 | ||
7274 | opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt", | |
7275 | FALSE, FALSE, TRUE); | |
7276 | if (opt != NULL) | |
7277 | func_desc_adjust (opt, info); | |
7278 | opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", | |
7279 | FALSE, FALSE, TRUE); | |
7280 | if (opt_fd != NULL | |
7281 | && (opt_fd->root.type == bfd_link_hash_defined | |
7282 | || opt_fd->root.type == bfd_link_hash_defweak)) | |
7283 | { | |
7284 | /* If glibc supports an optimized __tls_get_addr call stub, | |
7285 | signalled by the presence of __tls_get_addr_opt, and we'll | |
7286 | be calling __tls_get_addr via a plt call stub, then | |
7287 | make __tls_get_addr point to __tls_get_addr_opt. */ | |
7288 | tga_fd = &htab->tls_get_addr_fd->elf; | |
7289 | if (htab->elf.dynamic_sections_created | |
7290 | && tga_fd != NULL | |
7291 | && (tga_fd->type == STT_FUNC | |
7292 | || tga_fd->needs_plt) | |
7293 | && !(SYMBOL_CALLS_LOCAL (info, tga_fd) | |
21d68fcd | 7294 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd))) |
a7f2871e AM |
7295 | { |
7296 | struct plt_entry *ent; | |
7297 | ||
7298 | for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next) | |
7299 | if (ent->plt.refcount > 0) | |
7300 | break; | |
7301 | if (ent != NULL) | |
7302 | { | |
7303 | tga_fd->root.type = bfd_link_hash_indirect; | |
7304 | tga_fd->root.u.i.link = &opt_fd->root; | |
7305 | ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd); | |
b531344c | 7306 | opt_fd->mark = 1; |
a7f2871e AM |
7307 | if (opt_fd->dynindx != -1) |
7308 | { | |
7309 | /* Use __tls_get_addr_opt in dynamic relocations. */ | |
7310 | opt_fd->dynindx = -1; | |
7311 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
7312 | opt_fd->dynstr_index); | |
7313 | if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd)) | |
854b41e7 | 7314 | return NULL; |
a7f2871e | 7315 | } |
2cdcc330 AM |
7316 | htab->tls_get_addr_fd |
7317 | = (struct ppc_link_hash_entry *) opt_fd; | |
a7f2871e AM |
7318 | tga = &htab->tls_get_addr->elf; |
7319 | if (opt != NULL && tga != NULL) | |
7320 | { | |
7321 | tga->root.type = bfd_link_hash_indirect; | |
7322 | tga->root.u.i.link = &opt->root; | |
7323 | ppc64_elf_copy_indirect_symbol (info, opt, tga); | |
b531344c | 7324 | opt->mark = 1; |
a7f2871e AM |
7325 | _bfd_elf_link_hash_hide_symbol (info, opt, |
7326 | tga->forced_local); | |
7327 | htab->tls_get_addr = (struct ppc_link_hash_entry *) opt; | |
7328 | } | |
7329 | htab->tls_get_addr_fd->oh = htab->tls_get_addr; | |
7330 | htab->tls_get_addr_fd->is_func_descriptor = 1; | |
7331 | if (htab->tls_get_addr != NULL) | |
7332 | { | |
7333 | htab->tls_get_addr->oh = htab->tls_get_addr_fd; | |
7334 | htab->tls_get_addr->is_func = 1; | |
7335 | } | |
7336 | } | |
7337 | } | |
7338 | } | |
7c9cf415 AM |
7339 | else if (htab->params->tls_get_addr_opt < 0) |
7340 | htab->params->tls_get_addr_opt = 0; | |
a7f2871e | 7341 | } |
33c0ec9d | 7342 | return _bfd_elf_tls_setup (info->output_bfd, info); |
3a71aa26 | 7343 | } |
8387904d | 7344 | |
3a71aa26 AM |
7345 | /* Return TRUE iff REL is a branch reloc with a global symbol matching |
7346 | HASH1 or HASH2. */ | |
8387904d | 7347 | |
3a71aa26 AM |
7348 | static bfd_boolean |
7349 | branch_reloc_hash_match (const bfd *ibfd, | |
7350 | const Elf_Internal_Rela *rel, | |
7351 | const struct ppc_link_hash_entry *hash1, | |
7352 | const struct ppc_link_hash_entry *hash2) | |
7353 | { | |
7354 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); | |
7355 | enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info); | |
7356 | unsigned int r_symndx = ELF64_R_SYM (rel->r_info); | |
7357 | ||
e054468f | 7358 | if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) |
8387904d | 7359 | { |
3a71aa26 AM |
7360 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
7361 | struct elf_link_hash_entry *h; | |
8387904d | 7362 | |
3a71aa26 | 7363 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
b31867b6 | 7364 | h = elf_follow_link (h); |
3a71aa26 AM |
7365 | if (h == &hash1->elf || h == &hash2->elf) |
7366 | return TRUE; | |
a48ebf4d | 7367 | } |
3a71aa26 | 7368 | return FALSE; |
951fd09b | 7369 | } |
411e1bfb | 7370 | |
951fd09b AM |
7371 | /* Run through all the TLS relocs looking for optimization |
7372 | opportunities. The linker has been hacked (see ppc64elf.em) to do | |
7373 | a preliminary section layout so that we know the TLS segment | |
7374 | offsets. We can't optimize earlier because some optimizations need | |
7375 | to know the tp offset, and we need to optimize before allocating | |
7376 | dynamic relocations. */ | |
7377 | ||
7378 | bfd_boolean | |
33c0ec9d | 7379 | ppc64_elf_tls_optimize (struct bfd_link_info *info) |
951fd09b AM |
7380 | { |
7381 | bfd *ibfd; | |
7382 | asection *sec; | |
7383 | struct ppc_link_hash_table *htab; | |
663a1470 | 7384 | unsigned char *toc_ref; |
102890f0 | 7385 | int pass; |
951fd09b | 7386 | |
3cbc1e5e | 7387 | if (!bfd_link_executable (info)) |
411e1bfb AM |
7388 | return TRUE; |
7389 | ||
951fd09b | 7390 | htab = ppc_hash_table (info); |
4dfe6ac6 NC |
7391 | if (htab == NULL) |
7392 | return FALSE; | |
7393 | ||
663a1470 AM |
7394 | /* Make two passes over the relocs. On the first pass, mark toc |
7395 | entries involved with tls relocs, and check that tls relocs | |
7396 | involved in setting up a tls_get_addr call are indeed followed by | |
7397 | such a call. If they are not, we can't do any tls optimization. | |
7398 | On the second pass twiddle tls_mask flags to notify | |
7399 | relocate_section that optimization can be done, and adjust got | |
7400 | and plt refcounts. */ | |
7401 | toc_ref = NULL; | |
7402 | for (pass = 0; pass < 2; ++pass) | |
c72f2fb2 | 7403 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
663a1470 AM |
7404 | { |
7405 | Elf_Internal_Sym *locsyms = NULL; | |
7406 | asection *toc = bfd_get_section_by_name (ibfd, ".toc"); | |
7407 | ||
102890f0 AM |
7408 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
7409 | if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) | |
7410 | { | |
7411 | Elf_Internal_Rela *relstart, *rel, *relend; | |
663a1470 | 7412 | bfd_boolean found_tls_get_addr_arg = 0; |
411e1bfb | 7413 | |
102890f0 AM |
7414 | /* Read the relocations. */ |
7415 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, | |
7416 | info->keep_memory); | |
7417 | if (relstart == NULL) | |
2915c55b JK |
7418 | { |
7419 | free (toc_ref); | |
7420 | return FALSE; | |
7421 | } | |
411e1bfb | 7422 | |
102890f0 AM |
7423 | relend = relstart + sec->reloc_count; |
7424 | for (rel = relstart; rel < relend; rel++) | |
7425 | { | |
7426 | enum elf_ppc64_reloc_type r_type; | |
7427 | unsigned long r_symndx; | |
7428 | struct elf_link_hash_entry *h; | |
7429 | Elf_Internal_Sym *sym; | |
7430 | asection *sym_sec; | |
f961d9dd AM |
7431 | unsigned char *tls_mask; |
7432 | unsigned char tls_set, tls_clear, tls_type = 0; | |
102890f0 AM |
7433 | bfd_vma value; |
7434 | bfd_boolean ok_tprel, is_local; | |
7435 | long toc_ref_index = 0; | |
7436 | int expecting_tls_get_addr = 0; | |
663a1470 | 7437 | bfd_boolean ret = FALSE; |
411e1bfb | 7438 | |
102890f0 AM |
7439 | r_symndx = ELF64_R_SYM (rel->r_info); |
7440 | if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms, | |
7441 | r_symndx, ibfd)) | |
7442 | { | |
7443 | err_free_rel: | |
7444 | if (elf_section_data (sec)->relocs != relstart) | |
7445 | free (relstart); | |
7446 | if (toc_ref != NULL) | |
7447 | free (toc_ref); | |
7448 | if (locsyms != NULL | |
0ffa91dd | 7449 | && (elf_symtab_hdr (ibfd).contents |
102890f0 AM |
7450 | != (unsigned char *) locsyms)) |
7451 | free (locsyms); | |
663a1470 | 7452 | return ret; |
102890f0 | 7453 | } |
411e1bfb | 7454 | |
102890f0 AM |
7455 | if (h != NULL) |
7456 | { | |
766bc656 AM |
7457 | if (h->root.type == bfd_link_hash_defined |
7458 | || h->root.type == bfd_link_hash_defweak) | |
7459 | value = h->root.u.def.value; | |
7460 | else if (h->root.type == bfd_link_hash_undefweak) | |
7461 | value = 0; | |
7462 | else | |
663a1470 AM |
7463 | { |
7464 | found_tls_get_addr_arg = 0; | |
7465 | continue; | |
7466 | } | |
102890f0 AM |
7467 | } |
7468 | else | |
7469 | /* Symbols referenced by TLS relocs must be of type | |
7470 | STT_TLS. So no need for .opd local sym adjust. */ | |
7471 | value = sym->st_value; | |
7472 | ||
7473 | ok_tprel = FALSE; | |
7474 | is_local = FALSE; | |
7475 | if (h == NULL | |
7476 | || !h->def_dynamic) | |
7477 | { | |
7478 | is_local = TRUE; | |
766bc656 AM |
7479 | if (h != NULL |
7480 | && h->root.type == bfd_link_hash_undefweak) | |
7481 | ok_tprel = TRUE; | |
c27b8c2a AM |
7482 | else if (sym_sec != NULL |
7483 | && sym_sec->output_section != NULL) | |
766bc656 AM |
7484 | { |
7485 | value += sym_sec->output_offset; | |
7486 | value += sym_sec->output_section->vma; | |
7487 | value -= htab->elf.tls_sec->vma; | |
7488 | ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31) | |
7489 | < (bfd_vma) 1 << 32); | |
7490 | } | |
102890f0 | 7491 | } |
951fd09b | 7492 | |
102890f0 | 7493 | r_type = ELF64_R_TYPE (rel->r_info); |
663a1470 AM |
7494 | /* If this section has old-style __tls_get_addr calls |
7495 | without marker relocs, then check that each | |
7496 | __tls_get_addr call reloc is preceded by a reloc | |
7497 | that conceivably belongs to the __tls_get_addr arg | |
7498 | setup insn. If we don't find matching arg setup | |
7499 | relocs, don't do any tls optimization. */ | |
7500 | if (pass == 0 | |
7501 | && sec->has_tls_get_addr_call | |
7502 | && h != NULL | |
7503 | && (h == &htab->tls_get_addr->elf | |
7504 | || h == &htab->tls_get_addr_fd->elf) | |
7505 | && !found_tls_get_addr_arg | |
7506 | && is_branch_reloc (r_type)) | |
7507 | { | |
25f53a85 | 7508 | info->callbacks->minfo (_("%H __tls_get_addr lost arg, " |
663a1470 AM |
7509 | "TLS optimization disabled\n"), |
7510 | ibfd, sec, rel->r_offset); | |
7511 | ret = TRUE; | |
7512 | goto err_free_rel; | |
7513 | } | |
7514 | ||
7515 | found_tls_get_addr_arg = 0; | |
102890f0 AM |
7516 | switch (r_type) |
7517 | { | |
7518 | case R_PPC64_GOT_TLSLD16: | |
7519 | case R_PPC64_GOT_TLSLD16_LO: | |
7520 | expecting_tls_get_addr = 1; | |
663a1470 | 7521 | found_tls_get_addr_arg = 1; |
1a0670f3 | 7522 | /* Fall through. */ |
102890f0 AM |
7523 | |
7524 | case R_PPC64_GOT_TLSLD16_HI: | |
7525 | case R_PPC64_GOT_TLSLD16_HA: | |
7526 | /* These relocs should never be against a symbol | |
7527 | defined in a shared lib. Leave them alone if | |
7528 | that turns out to be the case. */ | |
7529 | if (!is_local) | |
7530 | continue; | |
411e1bfb | 7531 | |
102890f0 | 7532 | /* LD -> LE */ |
411e1bfb | 7533 | tls_set = 0; |
102890f0 AM |
7534 | tls_clear = TLS_LD; |
7535 | tls_type = TLS_TLS | TLS_LD; | |
7536 | break; | |
411e1bfb | 7537 | |
102890f0 AM |
7538 | case R_PPC64_GOT_TLSGD16: |
7539 | case R_PPC64_GOT_TLSGD16_LO: | |
7540 | expecting_tls_get_addr = 1; | |
663a1470 | 7541 | found_tls_get_addr_arg = 1; |
1a0670f3 | 7542 | /* Fall through. */ |
102890f0 AM |
7543 | |
7544 | case R_PPC64_GOT_TLSGD16_HI: | |
7545 | case R_PPC64_GOT_TLSGD16_HA: | |
7546 | if (ok_tprel) | |
7547 | /* GD -> LE */ | |
411e1bfb | 7548 | tls_set = 0; |
102890f0 AM |
7549 | else |
7550 | /* GD -> IE */ | |
7551 | tls_set = TLS_TLS | TLS_TPRELGD; | |
7552 | tls_clear = TLS_GD; | |
7553 | tls_type = TLS_TLS | TLS_GD; | |
7554 | break; | |
7555 | ||
7556 | case R_PPC64_GOT_TPREL16_DS: | |
7557 | case R_PPC64_GOT_TPREL16_LO_DS: | |
7558 | case R_PPC64_GOT_TPREL16_HI: | |
7559 | case R_PPC64_GOT_TPREL16_HA: | |
7560 | if (ok_tprel) | |
7561 | { | |
7562 | /* IE -> LE */ | |
7563 | tls_set = 0; | |
7564 | tls_clear = TLS_TPREL; | |
7565 | tls_type = TLS_TLS | TLS_TPREL; | |
7566 | break; | |
7567 | } | |
411e1bfb AM |
7568 | continue; |
7569 | ||
727fc41e AM |
7570 | case R_PPC64_TLSGD: |
7571 | case R_PPC64_TLSLD: | |
23cedd1d AM |
7572 | if (rel + 1 < relend |
7573 | && is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info))) | |
7574 | { | |
7575 | if (pass != 0 | |
2cdcc330 AM |
7576 | && (ELF64_R_TYPE (rel[1].r_info) |
7577 | != R_PPC64_PLTSEQ)) | |
23cedd1d AM |
7578 | { |
7579 | r_symndx = ELF64_R_SYM (rel[1].r_info); | |
7580 | if (!get_sym_h (&h, NULL, NULL, NULL, &locsyms, | |
2cdcc330 | 7581 | r_symndx, ibfd)) |
23cedd1d AM |
7582 | goto err_free_rel; |
7583 | if (h != NULL) | |
7584 | { | |
7585 | struct plt_entry *ent = NULL; | |
7586 | ||
7587 | for (ent = h->plt.plist; | |
7588 | ent != NULL; | |
7589 | ent = ent->next) | |
7590 | if (ent->addend == rel[1].r_addend) | |
7591 | break; | |
7592 | ||
7593 | if (ent != NULL | |
7594 | && ent->plt.refcount > 0) | |
7595 | ent->plt.refcount -= 1; | |
7596 | } | |
7597 | } | |
7598 | continue; | |
7599 | } | |
663a1470 | 7600 | found_tls_get_addr_arg = 1; |
1a0670f3 | 7601 | /* Fall through. */ |
663a1470 AM |
7602 | |
7603 | case R_PPC64_TLS: | |
7604 | case R_PPC64_TOC16: | |
7605 | case R_PPC64_TOC16_LO: | |
102890f0 AM |
7606 | if (sym_sec == NULL || sym_sec != toc) |
7607 | continue; | |
7608 | ||
7609 | /* Mark this toc entry as referenced by a TLS | |
7610 | code sequence. We can do that now in the | |
7611 | case of R_PPC64_TLS, and after checking for | |
7612 | tls_get_addr for the TOC16 relocs. */ | |
7613 | if (toc_ref == NULL) | |
2cdcc330 AM |
7614 | toc_ref |
7615 | = bfd_zmalloc (toc->output_section->rawsize / 8); | |
663a1470 AM |
7616 | if (toc_ref == NULL) |
7617 | goto err_free_rel; | |
7618 | ||
102890f0 AM |
7619 | if (h != NULL) |
7620 | value = h->root.u.def.value; | |
7621 | else | |
7622 | value = sym->st_value; | |
7623 | value += rel->r_addend; | |
73242275 AM |
7624 | if (value % 8 != 0) |
7625 | continue; | |
7626 | BFD_ASSERT (value < toc->size | |
7627 | && toc->output_offset % 8 == 0); | |
663a1470 | 7628 | toc_ref_index = (value + toc->output_offset) / 8; |
727fc41e AM |
7629 | if (r_type == R_PPC64_TLS |
7630 | || r_type == R_PPC64_TLSGD | |
7631 | || r_type == R_PPC64_TLSLD) | |
102890f0 AM |
7632 | { |
7633 | toc_ref[toc_ref_index] = 1; | |
7634 | continue; | |
7635 | } | |
7636 | ||
7637 | if (pass != 0 && toc_ref[toc_ref_index] == 0) | |
7638 | continue; | |
7639 | ||
7640 | tls_set = 0; | |
7641 | tls_clear = 0; | |
7642 | expecting_tls_get_addr = 2; | |
7643 | break; | |
7644 | ||
7645 | case R_PPC64_TPREL64: | |
7646 | if (pass == 0 | |
7647 | || sec != toc | |
7648 | || toc_ref == NULL | |
663a1470 | 7649 | || !toc_ref[(rel->r_offset + toc->output_offset) / 8]) |
102890f0 AM |
7650 | continue; |
7651 | if (ok_tprel) | |
7652 | { | |
7653 | /* IE -> LE */ | |
7654 | tls_set = TLS_EXPLICIT; | |
7655 | tls_clear = TLS_TPREL; | |
7656 | break; | |
7657 | } | |
7658 | continue; | |
7659 | ||
7660 | case R_PPC64_DTPMOD64: | |
7661 | if (pass == 0 | |
7662 | || sec != toc | |
7663 | || toc_ref == NULL | |
663a1470 | 7664 | || !toc_ref[(rel->r_offset + toc->output_offset) / 8]) |
102890f0 AM |
7665 | continue; |
7666 | if (rel + 1 < relend | |
7667 | && (rel[1].r_info | |
7668 | == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)) | |
7669 | && rel[1].r_offset == rel->r_offset + 8) | |
7670 | { | |
7671 | if (ok_tprel) | |
7672 | /* GD -> LE */ | |
7673 | tls_set = TLS_EXPLICIT | TLS_GD; | |
7674 | else | |
7675 | /* GD -> IE */ | |
7676 | tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD; | |
7677 | tls_clear = TLS_GD; | |
7678 | } | |
7679 | else | |
7680 | { | |
7681 | if (!is_local) | |
7682 | continue; | |
7683 | ||
7684 | /* LD -> LE */ | |
7685 | tls_set = TLS_EXPLICIT; | |
7686 | tls_clear = TLS_LD; | |
7687 | } | |
7688 | break; | |
7689 | ||
7690 | default: | |
7691 | continue; | |
7692 | } | |
7693 | ||
7694 | if (pass == 0) | |
7695 | { | |
727fc41e AM |
7696 | if (!expecting_tls_get_addr |
7697 | || !sec->has_tls_get_addr_call) | |
102890f0 AM |
7698 | continue; |
7699 | ||
3a71aa26 AM |
7700 | if (rel + 1 < relend |
7701 | && branch_reloc_hash_match (ibfd, rel + 1, | |
7702 | htab->tls_get_addr, | |
7703 | htab->tls_get_addr_fd)) | |
102890f0 | 7704 | { |
3a71aa26 | 7705 | if (expecting_tls_get_addr == 2) |
102890f0 | 7706 | { |
3a71aa26 | 7707 | /* Check for toc tls entries. */ |
f961d9dd | 7708 | unsigned char *toc_tls; |
3a71aa26 AM |
7709 | int retval; |
7710 | ||
7711 | retval = get_tls_mask (&toc_tls, NULL, NULL, | |
7712 | &locsyms, | |
7713 | rel, ibfd); | |
7714 | if (retval == 0) | |
7715 | goto err_free_rel; | |
663a1470 AM |
7716 | if (toc_tls != NULL) |
7717 | { | |
37da22e5 AM |
7718 | if ((*toc_tls & TLS_TLS) != 0 |
7719 | && ((*toc_tls & (TLS_GD | TLS_LD)) != 0)) | |
663a1470 AM |
7720 | found_tls_get_addr_arg = 1; |
7721 | if (retval > 1) | |
7722 | toc_ref[toc_ref_index] = 1; | |
7723 | } | |
102890f0 | 7724 | } |
3a71aa26 | 7725 | continue; |
102890f0 AM |
7726 | } |
7727 | ||
102890f0 AM |
7728 | /* Uh oh, we didn't find the expected call. We |
7729 | could just mark this symbol to exclude it | |
7730 | from tls optimization but it's safer to skip | |
663a1470 | 7731 | the entire optimization. */ |
695344c0 | 7732 | /* xgettext:c-format */ |
25f53a85 | 7733 | info->callbacks->minfo (_("%H arg lost __tls_get_addr, " |
663a1470 AM |
7734 | "TLS optimization disabled\n"), |
7735 | ibfd, sec, rel->r_offset); | |
7736 | ret = TRUE; | |
7737 | goto err_free_rel; | |
102890f0 AM |
7738 | } |
7739 | ||
37da22e5 AM |
7740 | /* If we don't have old-style __tls_get_addr calls |
7741 | without TLSGD/TLSLD marker relocs, and we haven't | |
7742 | found a new-style __tls_get_addr call with a | |
7743 | marker for this symbol, then we either have a | |
7744 | broken object file or an -mlongcall style | |
7745 | indirect call to __tls_get_addr without a marker. | |
7746 | Disable optimization in this case. */ | |
7747 | if ((tls_clear & (TLS_GD | TLS_LD)) != 0 | |
7748 | && (tls_set & TLS_EXPLICIT) == 0 | |
7749 | && !sec->has_tls_get_addr_call | |
7750 | && ((*tls_mask & (TLS_TLS | TLS_MARK)) | |
7751 | != (TLS_TLS | TLS_MARK))) | |
7752 | continue; | |
7753 | ||
23cedd1d | 7754 | if (expecting_tls_get_addr) |
102890f0 | 7755 | { |
23cedd1d AM |
7756 | struct plt_entry *ent = NULL; |
7757 | ||
7758 | if (htab->tls_get_addr != NULL) | |
7759 | for (ent = htab->tls_get_addr->elf.plt.plist; | |
7760 | ent != NULL; | |
7761 | ent = ent->next) | |
7762 | if (ent->addend == 0) | |
102890f0 | 7763 | break; |
411e1bfb | 7764 | |
23cedd1d AM |
7765 | if (ent == NULL && htab->tls_get_addr_fd != NULL) |
7766 | for (ent = htab->tls_get_addr_fd->elf.plt.plist; | |
7767 | ent != NULL; | |
7768 | ent = ent->next) | |
7769 | if (ent->addend == 0) | |
102890f0 | 7770 | break; |
23cedd1d AM |
7771 | |
7772 | if (ent != NULL | |
7773 | && ent->plt.refcount > 0) | |
7774 | ent->plt.refcount -= 1; | |
102890f0 | 7775 | } |
411e1bfb | 7776 | |
102890f0 | 7777 | if (tls_clear == 0) |
30038c59 AM |
7778 | continue; |
7779 | ||
102890f0 AM |
7780 | if ((tls_set & TLS_EXPLICIT) == 0) |
7781 | { | |
7782 | struct got_entry *ent; | |
411e1bfb | 7783 | |
102890f0 AM |
7784 | /* Adjust got entry for this reloc. */ |
7785 | if (h != NULL) | |
7786 | ent = h->got.glist; | |
7787 | else | |
7788 | ent = elf_local_got_ents (ibfd)[r_symndx]; | |
411e1bfb | 7789 | |
102890f0 AM |
7790 | for (; ent != NULL; ent = ent->next) |
7791 | if (ent->addend == rel->r_addend | |
7792 | && ent->owner == ibfd | |
7793 | && ent->tls_type == tls_type) | |
7794 | break; | |
7795 | if (ent == NULL) | |
7796 | abort (); | |
411e1bfb | 7797 | |
102890f0 AM |
7798 | if (tls_set == 0) |
7799 | { | |
7800 | /* We managed to get rid of a got entry. */ | |
7801 | if (ent->got.refcount > 0) | |
7802 | ent->got.refcount -= 1; | |
7803 | } | |
7804 | } | |
7805 | else | |
7806 | { | |
7807 | /* If we got rid of a DTPMOD/DTPREL reloc pair then | |
7808 | we'll lose one or two dyn relocs. */ | |
7809 | if (!dec_dynrel_count (rel->r_info, sec, info, | |
19e08130 | 7810 | NULL, h, sym)) |
102890f0 | 7811 | return FALSE; |
411e1bfb | 7812 | |
102890f0 AM |
7813 | if (tls_set == (TLS_EXPLICIT | TLS_GD)) |
7814 | { | |
7815 | if (!dec_dynrel_count ((rel + 1)->r_info, sec, info, | |
19e08130 | 7816 | NULL, h, sym)) |
102890f0 AM |
7817 | return FALSE; |
7818 | } | |
7819 | } | |
411e1bfb | 7820 | |
102890f0 AM |
7821 | *tls_mask |= tls_set; |
7822 | *tls_mask &= ~tls_clear; | |
7823 | } | |
8c1d1bb8 | 7824 | |
102890f0 AM |
7825 | if (elf_section_data (sec)->relocs != relstart) |
7826 | free (relstart); | |
7827 | } | |
411e1bfb | 7828 | |
663a1470 AM |
7829 | if (locsyms != NULL |
7830 | && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms)) | |
7831 | { | |
7832 | if (!info->keep_memory) | |
7833 | free (locsyms); | |
7834 | else | |
7835 | elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms; | |
7836 | } | |
7837 | } | |
411e1bfb | 7838 | |
663a1470 AM |
7839 | if (toc_ref != NULL) |
7840 | free (toc_ref); | |
9a23f96e | 7841 | htab->do_tls_opt = 1; |
b34976b6 | 7842 | return TRUE; |
1e2f5b6e | 7843 | } |
b34976b6 | 7844 | |
c5614fa4 AM |
7845 | /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust |
7846 | the values of any global symbols in a toc section that has been | |
7847 | edited. Globals in toc sections should be a rarity, so this function | |
7848 | sets a flag if any are found in toc sections other than the one just | |
de194d85 | 7849 | edited, so that further hash table traversals can be avoided. */ |
c5614fa4 AM |
7850 | |
7851 | struct adjust_toc_info | |
7852 | { | |
7853 | asection *toc; | |
7854 | unsigned long *skip; | |
7855 | bfd_boolean global_toc_syms; | |
7856 | }; | |
7857 | ||
ba761f19 AM |
7858 | enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 }; |
7859 | ||
c5614fa4 AM |
7860 | static bfd_boolean |
7861 | adjust_toc_syms (struct elf_link_hash_entry *h, void *inf) | |
7862 | { | |
7863 | struct ppc_link_hash_entry *eh; | |
7864 | struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf; | |
854b41e7 | 7865 | unsigned long i; |
c5614fa4 | 7866 | |
c5614fa4 AM |
7867 | if (h->root.type != bfd_link_hash_defined |
7868 | && h->root.type != bfd_link_hash_defweak) | |
7869 | return TRUE; | |
7870 | ||
7871 | eh = (struct ppc_link_hash_entry *) h; | |
7872 | if (eh->adjust_done) | |
7873 | return TRUE; | |
7874 | ||
7875 | if (eh->elf.root.u.def.section == toc_inf->toc) | |
7876 | { | |
854b41e7 AM |
7877 | if (eh->elf.root.u.def.value > toc_inf->toc->rawsize) |
7878 | i = toc_inf->toc->rawsize >> 3; | |
c5614fa4 | 7879 | else |
854b41e7 AM |
7880 | i = eh->elf.root.u.def.value >> 3; |
7881 | ||
ba761f19 | 7882 | if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0) |
c5614fa4 | 7883 | { |
4eca0228 | 7884 | _bfd_error_handler |
854b41e7 AM |
7885 | (_("%s defined on removed toc entry"), eh->elf.root.root.string); |
7886 | do | |
7887 | ++i; | |
ba761f19 | 7888 | while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0); |
854b41e7 | 7889 | eh->elf.root.u.def.value = (bfd_vma) i << 3; |
c5614fa4 | 7890 | } |
854b41e7 AM |
7891 | |
7892 | eh->elf.root.u.def.value -= toc_inf->skip[i]; | |
c5614fa4 AM |
7893 | eh->adjust_done = 1; |
7894 | } | |
7895 | else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0) | |
7896 | toc_inf->global_toc_syms = TRUE; | |
7897 | ||
7898 | return TRUE; | |
7899 | } | |
7900 | ||
39eeab25 AM |
7901 | /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect |
7902 | on a _LO variety toc/got reloc. */ | |
560c8763 AM |
7903 | |
7904 | static bfd_boolean | |
39eeab25 | 7905 | ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type) |
560c8763 | 7906 | { |
39eeab25 AM |
7907 | return ((insn & (0x3f << 26)) == 12u << 26 /* addic */ |
7908 | || (insn & (0x3f << 26)) == 14u << 26 /* addi */ | |
560c8763 AM |
7909 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ |
7910 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ | |
7911 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ | |
7912 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ | |
7913 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ | |
7914 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ | |
7915 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ | |
7916 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ | |
7917 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ | |
7918 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ | |
7919 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ | |
7920 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ | |
7921 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ | |
39eeab25 AM |
7922 | || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */ |
7923 | || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */ | |
7924 | /* Exclude lfqu by testing reloc. If relocs are ever | |
7925 | defined for the reduced D field in psq_lu then those | |
7926 | will need testing too. */ | |
7927 | && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO) | |
7928 | || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */ | |
7929 | && (insn & 1) == 0) | |
7930 | || (insn & (0x3f << 26)) == 60u << 26 /* stfq */ | |
7931 | || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */ | |
7932 | /* Exclude stfqu. psq_stu as above for psq_lu. */ | |
7933 | && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO) | |
7934 | || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */ | |
7935 | && (insn & 1) == 0)); | |
560c8763 AM |
7936 | } |
7937 | ||
c5614fa4 AM |
7938 | /* Examine all relocs referencing .toc sections in order to remove |
7939 | unused .toc entries. */ | |
7940 | ||
7941 | bfd_boolean | |
33c0ec9d | 7942 | ppc64_elf_edit_toc (struct bfd_link_info *info) |
c5614fa4 AM |
7943 | { |
7944 | bfd *ibfd; | |
7945 | struct adjust_toc_info toc_inf; | |
67f0cbdb | 7946 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
c5614fa4 | 7947 | |
67f0cbdb | 7948 | htab->do_toc_opt = 1; |
c5614fa4 | 7949 | toc_inf.global_toc_syms = TRUE; |
c72f2fb2 | 7950 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
c5614fa4 AM |
7951 | { |
7952 | asection *toc, *sec; | |
7953 | Elf_Internal_Shdr *symtab_hdr; | |
7954 | Elf_Internal_Sym *local_syms; | |
425b145b | 7955 | Elf_Internal_Rela *relstart, *rel, *toc_relocs; |
c5614fa4 AM |
7956 | unsigned long *skip, *drop; |
7957 | unsigned char *used; | |
7958 | unsigned char *keep, last, some_unused; | |
7959 | ||
854b41e7 AM |
7960 | if (!is_ppc64_elf (ibfd)) |
7961 | continue; | |
7962 | ||
c5614fa4 AM |
7963 | toc = bfd_get_section_by_name (ibfd, ".toc"); |
7964 | if (toc == NULL | |
92b7a70f | 7965 | || toc->size == 0 |
dbaa2011 AM |
7966 | || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS |
7967 | || discarded_section (toc)) | |
c5614fa4 AM |
7968 | continue; |
7969 | ||
425b145b | 7970 | toc_relocs = NULL; |
c5614fa4 | 7971 | local_syms = NULL; |
0ffa91dd | 7972 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c5614fa4 AM |
7973 | |
7974 | /* Look at sections dropped from the final link. */ | |
7975 | skip = NULL; | |
7976 | relstart = NULL; | |
7977 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
7978 | { | |
7979 | if (sec->reloc_count == 0 | |
dbaa2011 | 7980 | || !discarded_section (sec) |
c5614fa4 AM |
7981 | || get_opd_info (sec) |
7982 | || (sec->flags & SEC_ALLOC) == 0 | |
7983 | || (sec->flags & SEC_DEBUGGING) != 0) | |
7984 | continue; | |
7985 | ||
7986 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE); | |
7987 | if (relstart == NULL) | |
7988 | goto error_ret; | |
7989 | ||
7990 | /* Run through the relocs to see which toc entries might be | |
7991 | unused. */ | |
7992 | for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) | |
7993 | { | |
7994 | enum elf_ppc64_reloc_type r_type; | |
7995 | unsigned long r_symndx; | |
7996 | asection *sym_sec; | |
7997 | struct elf_link_hash_entry *h; | |
7998 | Elf_Internal_Sym *sym; | |
7999 | bfd_vma val; | |
8000 | ||
8001 | r_type = ELF64_R_TYPE (rel->r_info); | |
8002 | switch (r_type) | |
8003 | { | |
8004 | default: | |
8005 | continue; | |
8006 | ||
8007 | case R_PPC64_TOC16: | |
8008 | case R_PPC64_TOC16_LO: | |
8009 | case R_PPC64_TOC16_HI: | |
8010 | case R_PPC64_TOC16_HA: | |
8011 | case R_PPC64_TOC16_DS: | |
8012 | case R_PPC64_TOC16_LO_DS: | |
8013 | break; | |
8014 | } | |
8015 | ||
8016 | r_symndx = ELF64_R_SYM (rel->r_info); | |
8017 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, | |
8018 | r_symndx, ibfd)) | |
8019 | goto error_ret; | |
8020 | ||
8021 | if (sym_sec != toc) | |
8022 | continue; | |
8023 | ||
8024 | if (h != NULL) | |
8025 | val = h->root.u.def.value; | |
8026 | else | |
8027 | val = sym->st_value; | |
8028 | val += rel->r_addend; | |
8029 | ||
8030 | if (val >= toc->size) | |
8031 | continue; | |
8032 | ||
8033 | /* Anything in the toc ought to be aligned to 8 bytes. | |
8034 | If not, don't mark as unused. */ | |
8035 | if (val & 7) | |
8036 | continue; | |
8037 | ||
8038 | if (skip == NULL) | |
8039 | { | |
854b41e7 | 8040 | skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8); |
c5614fa4 AM |
8041 | if (skip == NULL) |
8042 | goto error_ret; | |
8043 | } | |
8044 | ||
ba761f19 | 8045 | skip[val >> 3] = ref_from_discarded; |
c5614fa4 AM |
8046 | } |
8047 | ||
8048 | if (elf_section_data (sec)->relocs != relstart) | |
8049 | free (relstart); | |
8050 | } | |
8051 | ||
ba761f19 AM |
8052 | /* For largetoc loads of address constants, we can convert |
8053 | . addis rx,2,addr@got@ha | |
8054 | . ld ry,addr@got@l(rx) | |
8055 | to | |
8056 | . addis rx,2,addr@toc@ha | |
8057 | . addi ry,rx,addr@toc@l | |
8058 | when addr is within 2G of the toc pointer. This then means | |
8059 | that the word storing "addr" in the toc is no longer needed. */ | |
68ffbac6 | 8060 | |
ba761f19 AM |
8061 | if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc |
8062 | && toc->output_section->rawsize < (bfd_vma) 1 << 31 | |
8063 | && toc->reloc_count != 0) | |
8064 | { | |
8065 | /* Read toc relocs. */ | |
425b145b AM |
8066 | toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, |
8067 | info->keep_memory); | |
8068 | if (toc_relocs == NULL) | |
ba761f19 AM |
8069 | goto error_ret; |
8070 | ||
425b145b | 8071 | for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel) |
ba761f19 AM |
8072 | { |
8073 | enum elf_ppc64_reloc_type r_type; | |
8074 | unsigned long r_symndx; | |
8075 | asection *sym_sec; | |
8076 | struct elf_link_hash_entry *h; | |
8077 | Elf_Internal_Sym *sym; | |
8078 | bfd_vma val, addr; | |
8079 | ||
8080 | r_type = ELF64_R_TYPE (rel->r_info); | |
8081 | if (r_type != R_PPC64_ADDR64) | |
8082 | continue; | |
8083 | ||
8084 | r_symndx = ELF64_R_SYM (rel->r_info); | |
8085 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, | |
8086 | r_symndx, ibfd)) | |
8087 | goto error_ret; | |
8088 | ||
425b145b | 8089 | if (sym_sec == NULL |
c27b8c2a | 8090 | || sym_sec->output_section == NULL |
dbaa2011 | 8091 | || discarded_section (sym_sec)) |
425b145b AM |
8092 | continue; |
8093 | ||
afe397ea | 8094 | if (!SYMBOL_REFERENCES_LOCAL (info, h)) |
ba761f19 AM |
8095 | continue; |
8096 | ||
8097 | if (h != NULL) | |
bddc25c9 AM |
8098 | { |
8099 | if (h->type == STT_GNU_IFUNC) | |
8100 | continue; | |
8101 | val = h->root.u.def.value; | |
8102 | } | |
ba761f19 | 8103 | else |
bddc25c9 AM |
8104 | { |
8105 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
8106 | continue; | |
8107 | val = sym->st_value; | |
8108 | } | |
ba761f19 AM |
8109 | val += rel->r_addend; |
8110 | val += sym_sec->output_section->vma + sym_sec->output_offset; | |
8111 | ||
8112 | /* We don't yet know the exact toc pointer value, but we | |
8113 | know it will be somewhere in the toc section. Don't | |
8114 | optimize if the difference from any possible toc | |
8115 | pointer is outside [ff..f80008000, 7fff7fff]. */ | |
8116 | addr = toc->output_section->vma + TOC_BASE_OFF; | |
8117 | if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32) | |
8118 | continue; | |
8119 | ||
8120 | addr = toc->output_section->vma + toc->output_section->rawsize; | |
8121 | if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32) | |
8122 | continue; | |
8123 | ||
8124 | if (skip == NULL) | |
8125 | { | |
8126 | skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8); | |
8127 | if (skip == NULL) | |
8128 | goto error_ret; | |
8129 | } | |
8130 | ||
8131 | skip[rel->r_offset >> 3] | |
425b145b | 8132 | |= can_optimize | ((rel - toc_relocs) << 2); |
ba761f19 | 8133 | } |
ba761f19 AM |
8134 | } |
8135 | ||
c5614fa4 AM |
8136 | if (skip == NULL) |
8137 | continue; | |
8138 | ||
8139 | used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8); | |
8140 | if (used == NULL) | |
8141 | { | |
8142 | error_ret: | |
8143 | if (local_syms != NULL | |
8144 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
8145 | free (local_syms); | |
8146 | if (sec != NULL | |
8147 | && relstart != NULL | |
8148 | && elf_section_data (sec)->relocs != relstart) | |
8149 | free (relstart); | |
425b145b AM |
8150 | if (toc_relocs != NULL |
8151 | && elf_section_data (toc)->relocs != toc_relocs) | |
8152 | free (toc_relocs); | |
c5614fa4 AM |
8153 | if (skip != NULL) |
8154 | free (skip); | |
8155 | return FALSE; | |
8156 | } | |
8157 | ||
30038c59 AM |
8158 | /* Now check all kept sections that might reference the toc. |
8159 | Check the toc itself last. */ | |
8160 | for (sec = (ibfd->sections == toc && toc->next ? toc->next | |
8161 | : ibfd->sections); | |
c5614fa4 | 8162 | sec != NULL; |
c5614fa4 | 8163 | sec = (sec == toc ? NULL |
c5614fa4 | 8164 | : sec->next == NULL ? toc |
30038c59 | 8165 | : sec->next == toc && toc->next ? toc->next |
c5614fa4 AM |
8166 | : sec->next)) |
8167 | { | |
8168 | int repeat; | |
8169 | ||
8170 | if (sec->reloc_count == 0 | |
dbaa2011 | 8171 | || discarded_section (sec) |
c5614fa4 AM |
8172 | || get_opd_info (sec) |
8173 | || (sec->flags & SEC_ALLOC) == 0 | |
8174 | || (sec->flags & SEC_DEBUGGING) != 0) | |
8175 | continue; | |
8176 | ||
854b41e7 AM |
8177 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
8178 | info->keep_memory); | |
c5614fa4 | 8179 | if (relstart == NULL) |
2915c55b JK |
8180 | { |
8181 | free (used); | |
8182 | goto error_ret; | |
8183 | } | |
c5614fa4 AM |
8184 | |
8185 | /* Mark toc entries referenced as used. */ | |
c5614fa4 | 8186 | do |
d4f1ee75 AM |
8187 | { |
8188 | repeat = 0; | |
8189 | for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) | |
8190 | { | |
8191 | enum elf_ppc64_reloc_type r_type; | |
8192 | unsigned long r_symndx; | |
8193 | asection *sym_sec; | |
8194 | struct elf_link_hash_entry *h; | |
8195 | Elf_Internal_Sym *sym; | |
8196 | bfd_vma val; | |
8197 | enum {no_check, check_lo, check_ha} insn_check; | |
98528052 | 8198 | |
d4f1ee75 AM |
8199 | r_type = ELF64_R_TYPE (rel->r_info); |
8200 | switch (r_type) | |
8201 | { | |
8202 | default: | |
8203 | insn_check = no_check; | |
8204 | break; | |
98528052 | 8205 | |
d4f1ee75 AM |
8206 | case R_PPC64_GOT_TLSLD16_HA: |
8207 | case R_PPC64_GOT_TLSGD16_HA: | |
8208 | case R_PPC64_GOT_TPREL16_HA: | |
8209 | case R_PPC64_GOT_DTPREL16_HA: | |
8210 | case R_PPC64_GOT16_HA: | |
8211 | case R_PPC64_TOC16_HA: | |
8212 | insn_check = check_ha; | |
8213 | break; | |
98528052 | 8214 | |
d4f1ee75 AM |
8215 | case R_PPC64_GOT_TLSLD16_LO: |
8216 | case R_PPC64_GOT_TLSGD16_LO: | |
8217 | case R_PPC64_GOT_TPREL16_LO_DS: | |
8218 | case R_PPC64_GOT_DTPREL16_LO_DS: | |
8219 | case R_PPC64_GOT16_LO: | |
8220 | case R_PPC64_GOT16_LO_DS: | |
8221 | case R_PPC64_TOC16_LO: | |
8222 | case R_PPC64_TOC16_LO_DS: | |
8223 | insn_check = check_lo; | |
8224 | break; | |
8225 | } | |
560c8763 | 8226 | |
d4f1ee75 AM |
8227 | if (insn_check != no_check) |
8228 | { | |
8229 | bfd_vma off = rel->r_offset & ~3; | |
8230 | unsigned char buf[4]; | |
8231 | unsigned int insn; | |
c5614fa4 | 8232 | |
d4f1ee75 AM |
8233 | if (!bfd_get_section_contents (ibfd, sec, buf, off, 4)) |
8234 | { | |
8235 | free (used); | |
8236 | goto error_ret; | |
8237 | } | |
8238 | insn = bfd_get_32 (ibfd, buf); | |
8239 | if (insn_check == check_lo | |
39eeab25 | 8240 | ? !ok_lo_toc_insn (insn, r_type) |
d4f1ee75 AM |
8241 | : ((insn & ((0x3f << 26) | 0x1f << 16)) |
8242 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
8243 | { | |
8244 | char str[12]; | |
8245 | ||
8246 | ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1; | |
8247 | sprintf (str, "%#08x", insn); | |
8248 | info->callbacks->einfo | |
695344c0 | 8249 | /* xgettext:c-format */ |
174d0a74 | 8250 | (_("%H: toc optimization is not supported for" |
cf97bcb0 | 8251 | " %s instruction\n"), |
d4f1ee75 AM |
8252 | ibfd, sec, rel->r_offset & ~3, str); |
8253 | } | |
8254 | } | |
c5614fa4 | 8255 | |
d4f1ee75 AM |
8256 | switch (r_type) |
8257 | { | |
8258 | case R_PPC64_TOC16: | |
8259 | case R_PPC64_TOC16_LO: | |
8260 | case R_PPC64_TOC16_HI: | |
8261 | case R_PPC64_TOC16_HA: | |
8262 | case R_PPC64_TOC16_DS: | |
8263 | case R_PPC64_TOC16_LO_DS: | |
8264 | /* In case we're taking addresses of toc entries. */ | |
8265 | case R_PPC64_ADDR64: | |
8266 | break; | |
c5614fa4 | 8267 | |
d4f1ee75 AM |
8268 | default: |
8269 | continue; | |
8270 | } | |
c5614fa4 | 8271 | |
d4f1ee75 AM |
8272 | r_symndx = ELF64_R_SYM (rel->r_info); |
8273 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, | |
8274 | r_symndx, ibfd)) | |
8275 | { | |
8276 | free (used); | |
8277 | goto error_ret; | |
8278 | } | |
c5614fa4 | 8279 | |
d4f1ee75 AM |
8280 | if (sym_sec != toc) |
8281 | continue; | |
c5614fa4 | 8282 | |
d4f1ee75 AM |
8283 | if (h != NULL) |
8284 | val = h->root.u.def.value; | |
8285 | else | |
8286 | val = sym->st_value; | |
8287 | val += rel->r_addend; | |
ba761f19 | 8288 | |
d4f1ee75 AM |
8289 | if (val >= toc->size) |
8290 | continue; | |
ba761f19 | 8291 | |
d4f1ee75 AM |
8292 | if ((skip[val >> 3] & can_optimize) != 0) |
8293 | { | |
8294 | bfd_vma off; | |
8295 | unsigned char opc; | |
8296 | ||
8297 | switch (r_type) | |
8298 | { | |
8299 | case R_PPC64_TOC16_HA: | |
ba761f19 | 8300 | break; |
ba761f19 | 8301 | |
d4f1ee75 AM |
8302 | case R_PPC64_TOC16_LO_DS: |
8303 | off = rel->r_offset; | |
8304 | off += (bfd_big_endian (ibfd) ? -2 : 3); | |
8305 | if (!bfd_get_section_contents (ibfd, sec, &opc, | |
8306 | off, 1)) | |
8307 | { | |
8308 | free (used); | |
8309 | goto error_ret; | |
8310 | } | |
8311 | if ((opc & (0x3f << 2)) == (58u << 2)) | |
8312 | break; | |
1a0670f3 | 8313 | /* Fall through. */ |
ba761f19 | 8314 | |
d4f1ee75 AM |
8315 | default: |
8316 | /* Wrong sort of reloc, or not a ld. We may | |
8317 | as well clear ref_from_discarded too. */ | |
8318 | skip[val >> 3] = 0; | |
8319 | } | |
8320 | } | |
8321 | ||
8322 | if (sec != toc) | |
8323 | used[val >> 3] = 1; | |
8324 | /* For the toc section, we only mark as used if this | |
8325 | entry itself isn't unused. */ | |
8326 | else if ((used[rel->r_offset >> 3] | |
8327 | || !(skip[rel->r_offset >> 3] & ref_from_discarded)) | |
8328 | && !used[val >> 3]) | |
8329 | { | |
8330 | /* Do all the relocs again, to catch reference | |
8331 | chains. */ | |
8332 | repeat = 1; | |
8333 | used[val >> 3] = 1; | |
8334 | } | |
8335 | } | |
8336 | } | |
c5614fa4 | 8337 | while (repeat); |
854b41e7 AM |
8338 | |
8339 | if (elf_section_data (sec)->relocs != relstart) | |
8340 | free (relstart); | |
c5614fa4 AM |
8341 | } |
8342 | ||
8343 | /* Merge the used and skip arrays. Assume that TOC | |
8344 | doublewords not appearing as either used or unused belong | |
de194d85 | 8345 | to an entry more than one doubleword in size. */ |
c5614fa4 AM |
8346 | for (drop = skip, keep = used, last = 0, some_unused = 0; |
8347 | drop < skip + (toc->size + 7) / 8; | |
8348 | ++drop, ++keep) | |
8349 | { | |
8350 | if (*keep) | |
8351 | { | |
ba761f19 AM |
8352 | *drop &= ~ref_from_discarded; |
8353 | if ((*drop & can_optimize) != 0) | |
8354 | some_unused = 1; | |
c5614fa4 AM |
8355 | last = 0; |
8356 | } | |
b140b010 | 8357 | else if ((*drop & ref_from_discarded) != 0) |
c5614fa4 AM |
8358 | { |
8359 | some_unused = 1; | |
ba761f19 | 8360 | last = ref_from_discarded; |
c5614fa4 AM |
8361 | } |
8362 | else | |
8363 | *drop = last; | |
8364 | } | |
8365 | ||
8366 | free (used); | |
8367 | ||
8368 | if (some_unused) | |
8369 | { | |
8370 | bfd_byte *contents, *src; | |
8371 | unsigned long off; | |
d62b3684 | 8372 | Elf_Internal_Sym *sym; |
ba761f19 | 8373 | bfd_boolean local_toc_syms = FALSE; |
c5614fa4 AM |
8374 | |
8375 | /* Shuffle the toc contents, and at the same time convert the | |
8376 | skip array from booleans into offsets. */ | |
8377 | if (!bfd_malloc_and_get_section (ibfd, toc, &contents)) | |
8378 | goto error_ret; | |
8379 | ||
8380 | elf_section_data (toc)->this_hdr.contents = contents; | |
8381 | ||
8382 | for (src = contents, off = 0, drop = skip; | |
8383 | src < contents + toc->size; | |
8384 | src += 8, ++drop) | |
8385 | { | |
ba761f19 AM |
8386 | if ((*drop & (can_optimize | ref_from_discarded)) != 0) |
8387 | off += 8; | |
c5614fa4 AM |
8388 | else if (off != 0) |
8389 | { | |
8390 | *drop = off; | |
8391 | memcpy (src - off, src, 8); | |
8392 | } | |
8393 | } | |
854b41e7 | 8394 | *drop = off; |
c5614fa4 AM |
8395 | toc->rawsize = toc->size; |
8396 | toc->size = src - contents - off; | |
8397 | ||
ba761f19 AM |
8398 | /* Adjust addends for relocs against the toc section sym, |
8399 | and optimize any accesses we can. */ | |
c5614fa4 AM |
8400 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
8401 | { | |
8402 | if (sec->reloc_count == 0 | |
dbaa2011 | 8403 | || discarded_section (sec)) |
c5614fa4 AM |
8404 | continue; |
8405 | ||
8406 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, | |
854b41e7 | 8407 | info->keep_memory); |
c5614fa4 AM |
8408 | if (relstart == NULL) |
8409 | goto error_ret; | |
8410 | ||
8411 | for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) | |
8412 | { | |
8413 | enum elf_ppc64_reloc_type r_type; | |
8414 | unsigned long r_symndx; | |
8415 | asection *sym_sec; | |
8416 | struct elf_link_hash_entry *h; | |
854b41e7 | 8417 | bfd_vma val; |
c5614fa4 AM |
8418 | |
8419 | r_type = ELF64_R_TYPE (rel->r_info); | |
8420 | switch (r_type) | |
8421 | { | |
8422 | default: | |
8423 | continue; | |
8424 | ||
8425 | case R_PPC64_TOC16: | |
8426 | case R_PPC64_TOC16_LO: | |
8427 | case R_PPC64_TOC16_HI: | |
8428 | case R_PPC64_TOC16_HA: | |
8429 | case R_PPC64_TOC16_DS: | |
8430 | case R_PPC64_TOC16_LO_DS: | |
8431 | case R_PPC64_ADDR64: | |
8432 | break; | |
8433 | } | |
8434 | ||
8435 | r_symndx = ELF64_R_SYM (rel->r_info); | |
8436 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, | |
8437 | r_symndx, ibfd)) | |
8438 | goto error_ret; | |
8439 | ||
ba761f19 | 8440 | if (sym_sec != toc) |
c5614fa4 AM |
8441 | continue; |
8442 | ||
ba761f19 AM |
8443 | if (h != NULL) |
8444 | val = h->root.u.def.value; | |
8445 | else | |
8446 | { | |
8447 | val = sym->st_value; | |
8448 | if (val != 0) | |
8449 | local_toc_syms = TRUE; | |
8450 | } | |
8451 | ||
8452 | val += rel->r_addend; | |
854b41e7 AM |
8453 | |
8454 | if (val > toc->rawsize) | |
8455 | val = toc->rawsize; | |
ba761f19 AM |
8456 | else if ((skip[val >> 3] & ref_from_discarded) != 0) |
8457 | continue; | |
8458 | else if ((skip[val >> 3] & can_optimize) != 0) | |
8459 | { | |
8460 | Elf_Internal_Rela *tocrel | |
425b145b | 8461 | = toc_relocs + (skip[val >> 3] >> 2); |
ba761f19 AM |
8462 | unsigned long tsym = ELF64_R_SYM (tocrel->r_info); |
8463 | ||
8464 | switch (r_type) | |
8465 | { | |
8466 | case R_PPC64_TOC16_HA: | |
8467 | rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA); | |
8468 | break; | |
8469 | ||
8470 | case R_PPC64_TOC16_LO_DS: | |
8471 | rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT); | |
8472 | break; | |
8473 | ||
8474 | default: | |
28942f62 AM |
8475 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
8476 | ppc_howto_init (); | |
b140b010 | 8477 | info->callbacks->einfo |
695344c0 | 8478 | /* xgettext:c-format */ |
174d0a74 | 8479 | (_("%H: %s references " |
b140b010 AM |
8480 | "optimized away TOC entry\n"), |
8481 | ibfd, sec, rel->r_offset, | |
8482 | ppc64_elf_howto_table[r_type]->name); | |
8483 | bfd_set_error (bfd_error_bad_value); | |
8484 | goto error_ret; | |
ba761f19 AM |
8485 | } |
8486 | rel->r_addend = tocrel->r_addend; | |
8487 | elf_section_data (sec)->relocs = relstart; | |
8488 | continue; | |
8489 | } | |
8490 | ||
8491 | if (h != NULL || sym->st_value != 0) | |
8492 | continue; | |
854b41e7 AM |
8493 | |
8494 | rel->r_addend -= skip[val >> 3]; | |
8495 | elf_section_data (sec)->relocs = relstart; | |
c5614fa4 | 8496 | } |
854b41e7 AM |
8497 | |
8498 | if (elf_section_data (sec)->relocs != relstart) | |
8499 | free (relstart); | |
c5614fa4 AM |
8500 | } |
8501 | ||
8502 | /* We shouldn't have local or global symbols defined in the TOC, | |
8503 | but handle them anyway. */ | |
df22d223 AM |
8504 | if (local_syms != NULL) |
8505 | for (sym = local_syms; | |
8506 | sym < local_syms + symtab_hdr->sh_info; | |
8507 | ++sym) | |
8508 | if (sym->st_value != 0 | |
8509 | && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc) | |
8510 | { | |
8511 | unsigned long i; | |
854b41e7 | 8512 | |
df22d223 AM |
8513 | if (sym->st_value > toc->rawsize) |
8514 | i = toc->rawsize >> 3; | |
8515 | else | |
8516 | i = sym->st_value >> 3; | |
854b41e7 | 8517 | |
df22d223 AM |
8518 | if ((skip[i] & (ref_from_discarded | can_optimize)) != 0) |
8519 | { | |
8520 | if (local_toc_syms) | |
4eca0228 | 8521 | _bfd_error_handler |
df22d223 AM |
8522 | (_("%s defined on removed toc entry"), |
8523 | bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL)); | |
8524 | do | |
8525 | ++i; | |
8526 | while ((skip[i] & (ref_from_discarded | can_optimize))); | |
8527 | sym->st_value = (bfd_vma) i << 3; | |
8528 | } | |
d62b3684 | 8529 | |
df22d223 AM |
8530 | sym->st_value -= skip[i]; |
8531 | symtab_hdr->contents = (unsigned char *) local_syms; | |
8532 | } | |
c5614fa4 | 8533 | |
854b41e7 | 8534 | /* Adjust any global syms defined in this toc input section. */ |
c5614fa4 AM |
8535 | if (toc_inf.global_toc_syms) |
8536 | { | |
8537 | toc_inf.toc = toc; | |
8538 | toc_inf.skip = skip; | |
8539 | toc_inf.global_toc_syms = FALSE; | |
8540 | elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms, | |
8541 | &toc_inf); | |
8542 | } | |
854b41e7 AM |
8543 | |
8544 | if (toc->reloc_count != 0) | |
8545 | { | |
d4730f92 | 8546 | Elf_Internal_Shdr *rel_hdr; |
854b41e7 AM |
8547 | Elf_Internal_Rela *wrel; |
8548 | bfd_size_type sz; | |
8549 | ||
854b41e7 | 8550 | /* Remove unused toc relocs, and adjust those we keep. */ |
28be611c AM |
8551 | if (toc_relocs == NULL) |
8552 | toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, | |
8553 | info->keep_memory); | |
8554 | if (toc_relocs == NULL) | |
8555 | goto error_ret; | |
8556 | ||
425b145b AM |
8557 | wrel = toc_relocs; |
8558 | for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel) | |
ba761f19 AM |
8559 | if ((skip[rel->r_offset >> 3] |
8560 | & (ref_from_discarded | can_optimize)) == 0) | |
854b41e7 AM |
8561 | { |
8562 | wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3]; | |
8563 | wrel->r_info = rel->r_info; | |
8564 | wrel->r_addend = rel->r_addend; | |
8565 | ++wrel; | |
8566 | } | |
8567 | else if (!dec_dynrel_count (rel->r_info, toc, info, | |
8568 | &local_syms, NULL, NULL)) | |
8569 | goto error_ret; | |
8570 | ||
425b145b AM |
8571 | elf_section_data (toc)->relocs = toc_relocs; |
8572 | toc->reloc_count = wrel - toc_relocs; | |
d4730f92 BS |
8573 | rel_hdr = _bfd_elf_single_rel_hdr (toc); |
8574 | sz = rel_hdr->sh_entsize; | |
8575 | rel_hdr->sh_size = toc->reloc_count * sz; | |
854b41e7 | 8576 | } |
c5614fa4 | 8577 | } |
28be611c AM |
8578 | else if (toc_relocs != NULL |
8579 | && elf_section_data (toc)->relocs != toc_relocs) | |
425b145b | 8580 | free (toc_relocs); |
c5614fa4 AM |
8581 | |
8582 | if (local_syms != NULL | |
8583 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
8584 | { | |
8585 | if (!info->keep_memory) | |
8586 | free (local_syms); | |
8587 | else | |
8588 | symtab_hdr->contents = (unsigned char *) local_syms; | |
8589 | } | |
8590 | free (skip); | |
8591 | } | |
8592 | ||
066f4018 AM |
8593 | /* Look for cases where we can change an indirect GOT access to |
8594 | a GOT relative access, possibly reducing the number of GOT | |
8595 | entries. */ | |
8596 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
8597 | { | |
8598 | asection *sec; | |
8599 | Elf_Internal_Shdr *symtab_hdr; | |
8600 | Elf_Internal_Sym *local_syms; | |
8601 | Elf_Internal_Rela *relstart, *rel; | |
8602 | bfd_vma got; | |
8603 | ||
8604 | if (!is_ppc64_elf (ibfd)) | |
8605 | continue; | |
8606 | ||
8607 | if (!ppc64_elf_tdata (ibfd)->has_gotrel) | |
8608 | continue; | |
8609 | ||
8610 | sec = ppc64_elf_tdata (ibfd)->got; | |
8611 | got = sec->output_section->vma + sec->output_offset + 0x8000; | |
8612 | ||
8613 | local_syms = NULL; | |
8614 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
8615 | ||
8616 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
8617 | { | |
8618 | if (sec->reloc_count == 0 | |
8619 | || !ppc64_elf_section_data (sec)->has_gotrel | |
8620 | || discarded_section (sec)) | |
8621 | continue; | |
8622 | ||
8623 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, | |
8624 | info->keep_memory); | |
8625 | if (relstart == NULL) | |
8626 | { | |
8627 | got_error_ret: | |
8628 | if (local_syms != NULL | |
8629 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
8630 | free (local_syms); | |
8631 | if (sec != NULL | |
8632 | && relstart != NULL | |
8633 | && elf_section_data (sec)->relocs != relstart) | |
8634 | free (relstart); | |
8635 | return FALSE; | |
8636 | } | |
8637 | ||
8638 | for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) | |
8639 | { | |
8640 | enum elf_ppc64_reloc_type r_type; | |
8641 | unsigned long r_symndx; | |
8642 | Elf_Internal_Sym *sym; | |
8643 | asection *sym_sec; | |
8644 | struct elf_link_hash_entry *h; | |
8645 | struct got_entry *ent; | |
8646 | bfd_vma val; | |
8647 | unsigned char buf[4]; | |
8648 | unsigned int insn; | |
8649 | ||
8650 | r_type = ELF64_R_TYPE (rel->r_info); | |
8651 | switch (r_type) | |
8652 | { | |
8653 | default: | |
8654 | continue; | |
8655 | ||
8656 | case R_PPC64_GOT16_DS: | |
8657 | case R_PPC64_GOT16_HA: | |
8658 | case R_PPC64_GOT16_LO_DS: | |
8659 | break; | |
8660 | } | |
8661 | ||
8662 | r_symndx = ELF64_R_SYM (rel->r_info); | |
8663 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, | |
8664 | r_symndx, ibfd)) | |
8665 | goto got_error_ret; | |
8666 | ||
8667 | if (!SYMBOL_REFERENCES_LOCAL (info, h)) | |
8668 | continue; | |
8669 | ||
8670 | if (h != NULL) | |
8671 | val = h->root.u.def.value; | |
8672 | else | |
8673 | val = sym->st_value; | |
8674 | val += rel->r_addend; | |
8675 | val += sym_sec->output_section->vma + sym_sec->output_offset; | |
8676 | ||
8677 | switch (r_type) | |
8678 | { | |
8679 | default: | |
8680 | continue; | |
8681 | ||
8682 | case R_PPC64_GOT16_DS: | |
8683 | if (val - got + 0x8000 >= 0x10000) | |
8684 | continue; | |
8685 | if (!bfd_get_section_contents (ibfd, sec, buf, | |
8686 | rel->r_offset & ~3, 4)) | |
8687 | goto got_error_ret; | |
8688 | insn = bfd_get_32 (ibfd, buf); | |
8689 | if ((insn & (0x3f << 26 | 0x3)) != 58u << 26 /* ld */) | |
8690 | continue; | |
8691 | break; | |
8692 | ||
8693 | case R_PPC64_GOT16_HA: | |
8694 | if (val - got + 0x80008000ULL >= 0x100000000ULL) | |
8695 | continue; | |
8696 | ||
8697 | if (!bfd_get_section_contents (ibfd, sec, buf, | |
8698 | rel->r_offset & ~3, 4)) | |
8699 | goto got_error_ret; | |
8700 | insn = bfd_get_32 (ibfd, buf); | |
8701 | if (((insn & ((0x3f << 26) | 0x1f << 16)) | |
8702 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
8703 | continue; | |
8704 | break; | |
8705 | ||
8706 | case R_PPC64_GOT16_LO_DS: | |
8707 | if (val - got + 0x80008000ULL >= 0x100000000ULL) | |
8708 | continue; | |
8709 | if (!bfd_get_section_contents (ibfd, sec, buf, | |
8710 | rel->r_offset & ~3, 4)) | |
8711 | goto got_error_ret; | |
8712 | insn = bfd_get_32 (ibfd, buf); | |
8713 | if ((insn & (0x3f << 26 | 0x3)) != 58u << 26 /* ld */) | |
8714 | continue; | |
8715 | break; | |
8716 | } | |
8717 | ||
8718 | if (h != NULL) | |
8719 | ent = h->got.glist; | |
8720 | else | |
8721 | { | |
8722 | struct got_entry **local_got_ents = elf_local_got_ents (ibfd); | |
8723 | ent = local_got_ents[r_symndx]; | |
8724 | } | |
8725 | for (; ent != NULL; ent = ent->next) | |
8726 | if (ent->addend == rel->r_addend | |
8727 | && ent->owner == ibfd | |
8728 | && ent->tls_type == 0) | |
8729 | break; | |
8730 | BFD_ASSERT (ent && ent->got.refcount > 0); | |
8731 | ent->got.refcount -= 1; | |
8732 | } | |
8733 | ||
8734 | if (elf_section_data (sec)->relocs != relstart) | |
8735 | free (relstart); | |
8736 | } | |
8737 | ||
8738 | if (local_syms != NULL | |
8739 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
8740 | { | |
8741 | if (!info->keep_memory) | |
8742 | free (local_syms); | |
8743 | else | |
8744 | symtab_hdr->contents = (unsigned char *) local_syms; | |
8745 | } | |
8746 | } | |
8747 | ||
c5614fa4 AM |
8748 | return TRUE; |
8749 | } | |
8750 | ||
1bbe0902 AM |
8751 | /* Return true iff input section I references the TOC using |
8752 | instructions limited to +/-32k offsets. */ | |
8753 | ||
8754 | bfd_boolean | |
8755 | ppc64_elf_has_small_toc_reloc (asection *i) | |
8756 | { | |
8757 | return (is_ppc64_elf (i->owner) | |
8758 | && ppc64_elf_tdata (i->owner)->has_small_toc_reloc); | |
8759 | } | |
8760 | ||
927be08e AM |
8761 | /* Allocate space for one GOT entry. */ |
8762 | ||
8763 | static void | |
8764 | allocate_got (struct elf_link_hash_entry *h, | |
8765 | struct bfd_link_info *info, | |
8766 | struct got_entry *gent) | |
8767 | { | |
8768 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
927be08e AM |
8769 | struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h; |
8770 | int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD) | |
8771 | ? 16 : 8); | |
8772 | int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD | |
8773 | ? 2 : 1) * sizeof (Elf64_External_Rela); | |
8774 | asection *got = ppc64_elf_tdata (gent->owner)->got; | |
8775 | ||
8776 | gent->got.offset = got->size; | |
8777 | got->size += entsize; | |
8778 | ||
19e08130 | 8779 | if (h->type == STT_GNU_IFUNC) |
927be08e | 8780 | { |
33e44f2e | 8781 | htab->elf.irelplt->size += rentsize; |
19e08130 | 8782 | htab->got_reli_size += rentsize; |
927be08e | 8783 | } |
f15d0b54 AM |
8784 | else if (((bfd_link_pic (info) |
8785 | && !((gent->tls_type & TLS_TPREL) != 0 | |
8786 | && bfd_link_executable (info) | |
8787 | && SYMBOL_REFERENCES_LOCAL (info, h))) | |
f0158f44 AM |
8788 | || (htab->elf.dynamic_sections_created |
8789 | && h->dynindx != -1 | |
8790 | && !SYMBOL_REFERENCES_LOCAL (info, h))) | |
21d68fcd | 8791 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
927be08e | 8792 | { |
19e08130 | 8793 | asection *relgot = ppc64_elf_tdata (gent->owner)->relgot; |
927be08e | 8794 | relgot->size += rentsize; |
927be08e AM |
8795 | } |
8796 | } | |
8797 | ||
7865406b AM |
8798 | /* This function merges got entries in the same toc group. */ |
8799 | ||
8800 | static void | |
8801 | merge_got_entries (struct got_entry **pent) | |
8802 | { | |
8803 | struct got_entry *ent, *ent2; | |
8804 | ||
8805 | for (ent = *pent; ent != NULL; ent = ent->next) | |
8806 | if (!ent->is_indirect) | |
8807 | for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next) | |
8808 | if (!ent2->is_indirect | |
8809 | && ent2->addend == ent->addend | |
8810 | && ent2->tls_type == ent->tls_type | |
8811 | && elf_gp (ent2->owner) == elf_gp (ent->owner)) | |
8812 | { | |
8813 | ent2->is_indirect = TRUE; | |
8814 | ent2->got.ent = ent; | |
8815 | } | |
8816 | } | |
8817 | ||
46434633 | 8818 | /* If H is undefined, make it dynamic if that makes sense. */ |
f0158f44 AM |
8819 | |
8820 | static bfd_boolean | |
46434633 AM |
8821 | ensure_undef_dynamic (struct bfd_link_info *info, |
8822 | struct elf_link_hash_entry *h) | |
f0158f44 AM |
8823 | { |
8824 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
8825 | ||
8826 | if (htab->dynamic_sections_created | |
46434633 AM |
8827 | && ((info->dynamic_undefined_weak != 0 |
8828 | && h->root.type == bfd_link_hash_undefweak) | |
8829 | || h->root.type == bfd_link_hash_undefined) | |
f0158f44 AM |
8830 | && h->dynindx == -1 |
8831 | && !h->forced_local | |
8832 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
8833 | return bfd_elf_link_record_dynamic_symbol (info, h); | |
8834 | return TRUE; | |
8835 | } | |
8836 | ||
65f38f15 AM |
8837 | /* Allocate space in .plt, .got and associated reloc sections for |
8838 | dynamic relocs. */ | |
5bd4f169 | 8839 | |
b34976b6 | 8840 | static bfd_boolean |
4ce794b7 | 8841 | allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
5bd4f169 | 8842 | { |
65f38f15 AM |
8843 | struct bfd_link_info *info; |
8844 | struct ppc_link_hash_table *htab; | |
5bd4f169 | 8845 | asection *s; |
65f38f15 | 8846 | struct ppc_link_hash_entry *eh; |
0b8bcf0d | 8847 | struct got_entry **pgent, *gent; |
5bd4f169 | 8848 | |
e92d460e | 8849 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 8850 | return TRUE; |
5bd4f169 | 8851 | |
65f38f15 AM |
8852 | info = (struct bfd_link_info *) inf; |
8853 | htab = ppc_hash_table (info); | |
4dfe6ac6 NC |
8854 | if (htab == NULL) |
8855 | return FALSE; | |
5bd4f169 | 8856 | |
951fd09b AM |
8857 | eh = (struct ppc_link_hash_entry *) h; |
8858 | /* Run through the TLS GD got entries first if we're changing them | |
8859 | to TPREL. */ | |
37da22e5 | 8860 | if ((eh->tls_mask & (TLS_TLS | TLS_TPRELGD)) == (TLS_TLS | TLS_TPRELGD)) |
951fd09b AM |
8861 | for (gent = h->got.glist; gent != NULL; gent = gent->next) |
8862 | if (gent->got.refcount > 0 | |
8863 | && (gent->tls_type & TLS_GD) != 0) | |
8864 | { | |
8865 | /* This was a GD entry that has been converted to TPREL. If | |
8866 | there happens to be a TPREL entry we can use that one. */ | |
8867 | struct got_entry *ent; | |
8868 | for (ent = h->got.glist; ent != NULL; ent = ent->next) | |
8869 | if (ent->got.refcount > 0 | |
8870 | && (ent->tls_type & TLS_TPREL) != 0 | |
e717da7e AM |
8871 | && ent->addend == gent->addend |
8872 | && ent->owner == gent->owner) | |
951fd09b AM |
8873 | { |
8874 | gent->got.refcount = 0; | |
8875 | break; | |
8876 | } | |
8877 | ||
8878 | /* If not, then we'll be using our own TPREL entry. */ | |
8879 | if (gent->got.refcount != 0) | |
8880 | gent->tls_type = TLS_TLS | TLS_TPREL; | |
8881 | } | |
8882 | ||
7865406b AM |
8883 | /* Remove any list entry that won't generate a word in the GOT before |
8884 | we call merge_got_entries. Otherwise we risk merging to empty | |
8885 | entries. */ | |
0b8bcf0d AM |
8886 | pgent = &h->got.glist; |
8887 | while ((gent = *pgent) != NULL) | |
411e1bfb | 8888 | if (gent->got.refcount > 0) |
7865406b AM |
8889 | { |
8890 | if ((gent->tls_type & TLS_LD) != 0 | |
8891 | && !h->def_dynamic) | |
8892 | { | |
8893 | ppc64_tlsld_got (gent->owner)->got.refcount += 1; | |
8894 | *pgent = gent->next; | |
8895 | } | |
8896 | else | |
8897 | pgent = &gent->next; | |
8898 | } | |
8899 | else | |
8900 | *pgent = gent->next; | |
8901 | ||
8902 | if (!htab->do_multi_toc) | |
8903 | merge_got_entries (&h->got.glist); | |
8904 | ||
8905 | for (gent = h->got.glist; gent != NULL; gent = gent->next) | |
8906 | if (!gent->is_indirect) | |
411e1bfb | 8907 | { |
46434633 AM |
8908 | /* Make sure this symbol is output as a dynamic symbol. */ |
8909 | if (!ensure_undef_dynamic (info, h)) | |
f0158f44 | 8910 | return FALSE; |
65f38f15 | 8911 | |
0c8d6e5c | 8912 | if (!is_ppc64_elf (gent->owner)) |
927be08e | 8913 | abort (); |
0ffa91dd | 8914 | |
927be08e | 8915 | allocate_got (h, info, gent); |
411e1bfb | 8916 | } |
65f38f15 | 8917 | |
954b63d4 AM |
8918 | /* If no dynamic sections we can't have dynamic relocs, except for |
8919 | IFUNCs which are handled even in static executables. */ | |
8a2058b5 AM |
8920 | if (!htab->elf.dynamic_sections_created |
8921 | && h->type != STT_GNU_IFUNC) | |
8922 | eh->dyn_relocs = NULL; | |
8923 | ||
529fe20e AM |
8924 | /* Discard relocs on undefined symbols that must be local. */ |
8925 | else if (h->root.type == bfd_link_hash_undefined | |
8926 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
8927 | eh->dyn_relocs = NULL; | |
8928 | ||
954b63d4 AM |
8929 | /* Also discard relocs on undefined weak syms with non-default |
8930 | visibility, or when dynamic_undefined_weak says so. */ | |
21d68fcd | 8931 | else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
954b63d4 AM |
8932 | eh->dyn_relocs = NULL; |
8933 | ||
8a2058b5 | 8934 | if (eh->dyn_relocs != NULL) |
65f38f15 | 8935 | { |
8a2058b5 AM |
8936 | struct elf_dyn_relocs *p, **pp; |
8937 | ||
57e7d118 AM |
8938 | /* In the shared -Bsymbolic case, discard space allocated for |
8939 | dynamic pc-relative relocs against symbols which turn out to | |
8940 | be defined in regular objects. For the normal shared case, | |
8941 | discard space for relocs that have become local due to symbol | |
8942 | visibility changes. */ | |
8943 | ||
8944 | if (bfd_link_pic (info)) | |
65f38f15 | 8945 | { |
57e7d118 AM |
8946 | /* Relocs that use pc_count are those that appear on a call |
8947 | insn, or certain REL relocs (see must_be_dyn_reloc) that | |
8948 | can be generated via assembly. We want calls to | |
8949 | protected symbols to resolve directly to the function | |
8950 | rather than going via the plt. If people want function | |
8951 | pointer comparisons to work as expected then they should | |
8952 | avoid writing weird assembly. */ | |
8953 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
8954 | { | |
57e7d118 AM |
8955 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
8956 | { | |
8957 | p->count -= p->pc_count; | |
8958 | p->pc_count = 0; | |
8959 | if (p->count == 0) | |
8960 | *pp = p->next; | |
8961 | else | |
8962 | pp = &p->next; | |
8963 | } | |
8964 | } | |
65f38f15 | 8965 | |
954b63d4 | 8966 | if (eh->dyn_relocs != NULL) |
5bd4f169 | 8967 | { |
46434633 AM |
8968 | /* Make sure this symbol is output as a dynamic symbol. */ |
8969 | if (!ensure_undef_dynamic (info, h)) | |
f0158f44 | 8970 | return FALSE; |
5bd4f169 | 8971 | } |
65f38f15 | 8972 | } |
529fe20e | 8973 | else if (ELIMINATE_COPY_RELOCS && h->type != STT_GNU_IFUNC) |
57e7d118 | 8974 | { |
8a2058b5 | 8975 | /* For the non-pic case, discard space for relocs against |
57e7d118 AM |
8976 | symbols which turn out to need copy relocs or are not |
8977 | dynamic. */ | |
529fe20e AM |
8978 | if (h->dynamic_adjusted |
8979 | && !h->def_regular | |
8980 | && !ELF_COMMON_DEF_P (h)) | |
f0158f44 | 8981 | { |
46434633 AM |
8982 | /* Make sure this symbol is output as a dynamic symbol. */ |
8983 | if (!ensure_undef_dynamic (info, h)) | |
f0158f44 | 8984 | return FALSE; |
dfbb6ac9 | 8985 | |
f0158f44 AM |
8986 | if (h->dynindx == -1) |
8987 | eh->dyn_relocs = NULL; | |
8988 | } | |
8989 | else | |
8a2058b5 | 8990 | eh->dyn_relocs = NULL; |
57e7d118 AM |
8991 | } |
8992 | ||
8993 | /* Finally, allocate space. */ | |
8994 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
8995 | { | |
8996 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
8997 | if (eh->elf.type == STT_GNU_IFUNC) | |
8998 | sreloc = htab->elf.irelplt; | |
8999 | sreloc->size += p->count * sizeof (Elf64_External_Rela); | |
dfbb6ac9 | 9000 | } |
65f38f15 | 9001 | } |
57e7d118 | 9002 | |
2d7ad24e AM |
9003 | /* We might need a PLT entry when the symbol |
9004 | a) is dynamic, or | |
9005 | b) is an ifunc, or | |
9006 | c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or | |
9007 | d) has plt16 relocs and we are linking statically. */ | |
9008 | if ((htab->elf.dynamic_sections_created && h->dynindx != -1) | |
9009 | || h->type == STT_GNU_IFUNC | |
9010 | || (h->needs_plt && h->dynamic_adjusted) | |
9011 | || (h->needs_plt | |
9012 | && h->def_regular | |
9013 | && !htab->elf.dynamic_sections_created | |
3e04d765 | 9014 | && !htab->can_convert_all_inline_plt |
2d7ad24e AM |
9015 | && (((struct ppc_link_hash_entry *) h)->tls_mask |
9016 | & (TLS_TLS | PLT_KEEP)) == PLT_KEEP)) | |
65f38f15 | 9017 | { |
57e7d118 AM |
9018 | struct plt_entry *pent; |
9019 | bfd_boolean doneone = FALSE; | |
9020 | for (pent = h->plt.plist; pent != NULL; pent = pent->next) | |
9021 | if (pent->plt.refcount > 0) | |
9022 | { | |
9023 | if (!htab->elf.dynamic_sections_created | |
9024 | || h->dynindx == -1) | |
9025 | { | |
2d7ad24e AM |
9026 | if (h->type == STT_GNU_IFUNC) |
9027 | { | |
9028 | s = htab->elf.iplt; | |
9029 | pent->plt.offset = s->size; | |
9030 | s->size += PLT_ENTRY_SIZE (htab); | |
9031 | s = htab->elf.irelplt; | |
9032 | } | |
9033 | else | |
9034 | { | |
9035 | s = htab->pltlocal; | |
9036 | pent->plt.offset = s->size; | |
9037 | s->size += LOCAL_PLT_ENTRY_SIZE (htab); | |
9038 | s = bfd_link_pic (info) ? htab->relpltlocal : NULL; | |
9039 | } | |
57e7d118 AM |
9040 | } |
9041 | else | |
9042 | { | |
9043 | /* If this is the first .plt entry, make room for the special | |
9044 | first entry. */ | |
9045 | s = htab->elf.splt; | |
9046 | if (s->size == 0) | |
9047 | s->size += PLT_INITIAL_ENTRY_SIZE (htab); | |
65f38f15 | 9048 | |
57e7d118 | 9049 | pent->plt.offset = s->size; |
65f38f15 | 9050 | |
57e7d118 AM |
9051 | /* Make room for this entry. */ |
9052 | s->size += PLT_ENTRY_SIZE (htab); | |
65f38f15 | 9053 | |
57e7d118 AM |
9054 | /* Make room for the .glink code. */ |
9055 | s = htab->glink; | |
9056 | if (s->size == 0) | |
9e390558 | 9057 | s->size += GLINK_PLTRESOLVE_SIZE (htab); |
57e7d118 AM |
9058 | if (htab->opd_abi) |
9059 | { | |
9060 | /* We need bigger stubs past index 32767. */ | |
9e390558 | 9061 | if (s->size >= GLINK_PLTRESOLVE_SIZE (htab) + 32768*2*4) |
57e7d118 AM |
9062 | s->size += 4; |
9063 | s->size += 2*4; | |
9064 | } | |
9065 | else | |
9066 | s->size += 4; | |
65f38f15 | 9067 | |
57e7d118 AM |
9068 | /* We also need to make an entry in the .rela.plt section. */ |
9069 | s = htab->elf.srelplt; | |
9070 | } | |
2d7ad24e AM |
9071 | if (s != NULL) |
9072 | s->size += sizeof (Elf64_External_Rela); | |
57e7d118 AM |
9073 | doneone = TRUE; |
9074 | } | |
9075 | else | |
9076 | pent->plt.offset = (bfd_vma) -1; | |
9077 | if (!doneone) | |
9078 | { | |
9079 | h->plt.plist = NULL; | |
9080 | h->needs_plt = 0; | |
9081 | } | |
65f38f15 | 9082 | } |
57e7d118 | 9083 | else |
65f38f15 | 9084 | { |
57e7d118 AM |
9085 | h->plt.plist = NULL; |
9086 | h->needs_plt = 0; | |
65f38f15 AM |
9087 | } |
9088 | ||
b34976b6 | 9089 | return TRUE; |
65f38f15 AM |
9090 | } |
9091 | ||
9e390558 AM |
9092 | #define PPC_LO(v) ((v) & 0xffff) |
9093 | #define PPC_HI(v) (((v) >> 16) & 0xffff) | |
9094 | #define PPC_HA(v) PPC_HI ((v) + 0x8000) | |
9095 | ||
a345bc8d AM |
9096 | /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections |
9097 | to set up space for global entry stubs. These are put in glink, | |
9098 | after the branch table. */ | |
65f38f15 | 9099 | |
b34976b6 | 9100 | static bfd_boolean |
a345bc8d | 9101 | size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf) |
65f38f15 | 9102 | { |
a345bc8d AM |
9103 | struct bfd_link_info *info; |
9104 | struct ppc_link_hash_table *htab; | |
9105 | struct plt_entry *pent; | |
9e390558 | 9106 | asection *s, *plt; |
65f38f15 | 9107 | |
a345bc8d AM |
9108 | if (h->root.type == bfd_link_hash_indirect) |
9109 | return TRUE; | |
65f38f15 | 9110 | |
a345bc8d AM |
9111 | if (!h->pointer_equality_needed) |
9112 | return TRUE; | |
65f38f15 | 9113 | |
a345bc8d AM |
9114 | if (h->def_regular) |
9115 | return TRUE; | |
65f38f15 | 9116 | |
a345bc8d AM |
9117 | info = inf; |
9118 | htab = ppc_hash_table (info); | |
9119 | if (htab == NULL) | |
9120 | return FALSE; | |
9121 | ||
9e390558 AM |
9122 | s = htab->global_entry; |
9123 | plt = htab->elf.splt; | |
a345bc8d AM |
9124 | for (pent = h->plt.plist; pent != NULL; pent = pent->next) |
9125 | if (pent->plt.offset != (bfd_vma) -1 | |
9126 | && pent->addend == 0) | |
9127 | { | |
afe397ea AM |
9128 | /* For ELFv2, if this symbol is not defined in a regular file |
9129 | and we are not generating a shared library or pie, then we | |
9130 | need to define the symbol in the executable on a call stub. | |
9131 | This is to avoid text relocations. */ | |
9e390558 AM |
9132 | bfd_vma off, stub_align, stub_off, stub_size; |
9133 | unsigned int align_power; | |
9134 | ||
9135 | stub_size = 16; | |
9136 | stub_off = s->size; | |
9137 | if (htab->params->plt_stub_align >= 0) | |
9138 | align_power = htab->params->plt_stub_align; | |
9139 | else | |
9140 | align_power = -htab->params->plt_stub_align; | |
9141 | /* Setting section alignment is delayed until we know it is | |
9142 | non-empty. Otherwise the .text output section will be | |
9143 | aligned at least to plt_stub_align even when no global | |
9144 | entry stubs are needed. */ | |
9145 | if (s->alignment_power < align_power) | |
9146 | s->alignment_power = align_power; | |
9147 | stub_align = (bfd_vma) 1 << align_power; | |
9148 | if (htab->params->plt_stub_align >= 0 | |
9149 | || ((((stub_off + stub_size - 1) & -stub_align) | |
9150 | - (stub_off & -stub_align)) | |
9151 | > ((stub_size - 1) & -stub_align))) | |
9152 | stub_off = (stub_off + stub_align - 1) & -stub_align; | |
9153 | off = pent->plt.offset + plt->output_offset + plt->output_section->vma; | |
9154 | off -= stub_off + s->output_offset + s->output_section->vma; | |
9155 | /* Note that for --plt-stub-align negative we have a possible | |
9156 | dependency between stub offset and size. Break that | |
9157 | dependency by assuming the max stub size when calculating | |
9158 | the stub offset. */ | |
9159 | if (PPC_HA (off) == 0) | |
9160 | stub_size -= 4; | |
8a2058b5 | 9161 | h->root.type = bfd_link_hash_defined; |
afe397ea | 9162 | h->root.u.def.section = s; |
9e390558 AM |
9163 | h->root.u.def.value = stub_off; |
9164 | s->size = stub_off + stub_size; | |
a345bc8d AM |
9165 | break; |
9166 | } | |
9167 | return TRUE; | |
9168 | } | |
9169 | ||
9170 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to | |
9171 | read-only sections. */ | |
9172 | ||
9173 | static bfd_boolean | |
98bbb1b8 | 9174 | maybe_set_textrel (struct elf_link_hash_entry *h, void *inf) |
a345bc8d | 9175 | { |
98bbb1b8 AM |
9176 | asection *sec; |
9177 | ||
a345bc8d AM |
9178 | if (h->root.type == bfd_link_hash_indirect) |
9179 | return TRUE; | |
9180 | ||
98bbb1b8 AM |
9181 | sec = readonly_dynrelocs (h); |
9182 | if (sec != NULL) | |
a345bc8d | 9183 | { |
98bbb1b8 AM |
9184 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
9185 | ||
9186 | info->flags |= DF_TEXTREL; | |
2cdcc330 AM |
9187 | info->callbacks->minfo (_("%pB: dynamic relocation against `%pT'" |
9188 | " in read-only section `%pA'\n"), | |
9189 | sec->owner, h->root.root.string, sec); | |
a345bc8d AM |
9190 | |
9191 | /* Not an error, just cut short the traversal. */ | |
9192 | return FALSE; | |
65f38f15 | 9193 | } |
b34976b6 | 9194 | return TRUE; |
65f38f15 AM |
9195 | } |
9196 | ||
9197 | /* Set the sizes of the dynamic sections. */ | |
9198 | ||
b34976b6 | 9199 | static bfd_boolean |
ee67d69a | 9200 | ppc64_elf_size_dynamic_sections (bfd *output_bfd, |
4ce794b7 | 9201 | struct bfd_link_info *info) |
65f38f15 AM |
9202 | { |
9203 | struct ppc_link_hash_table *htab; | |
9204 | bfd *dynobj; | |
9205 | asection *s; | |
b34976b6 | 9206 | bfd_boolean relocs; |
65f38f15 | 9207 | bfd *ibfd; |
7865406b | 9208 | struct got_entry *first_tlsld; |
65f38f15 AM |
9209 | |
9210 | htab = ppc_hash_table (info); | |
4dfe6ac6 NC |
9211 | if (htab == NULL) |
9212 | return FALSE; | |
9213 | ||
65f38f15 AM |
9214 | dynobj = htab->elf.dynobj; |
9215 | if (dynobj == NULL) | |
9216 | abort (); | |
9217 | ||
9218 | if (htab->elf.dynamic_sections_created) | |
9219 | { | |
9220 | /* Set the contents of the .interp section to the interpreter. */ | |
9b8b325a | 9221 | if (bfd_link_executable (info) && !info->nointerp) |
65f38f15 | 9222 | { |
3d4d4302 | 9223 | s = bfd_get_linker_section (dynobj, ".interp"); |
65f38f15 AM |
9224 | if (s == NULL) |
9225 | abort (); | |
eea6121a | 9226 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
65f38f15 AM |
9227 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
9228 | } | |
9229 | } | |
9230 | ||
9231 | /* Set up .got offsets for local syms, and space for local dynamic | |
9232 | relocs. */ | |
c72f2fb2 | 9233 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
65f38f15 | 9234 | { |
411e1bfb AM |
9235 | struct got_entry **lgot_ents; |
9236 | struct got_entry **end_lgot_ents; | |
e054468f AM |
9237 | struct plt_entry **local_plt; |
9238 | struct plt_entry **end_local_plt; | |
f961d9dd | 9239 | unsigned char *lgot_masks; |
65f38f15 AM |
9240 | bfd_size_type locsymcount; |
9241 | Elf_Internal_Shdr *symtab_hdr; | |
65f38f15 | 9242 | |
0c8d6e5c | 9243 | if (!is_ppc64_elf (ibfd)) |
65f38f15 AM |
9244 | continue; |
9245 | ||
9246 | for (s = ibfd->sections; s != NULL; s = s->next) | |
9247 | { | |
19e08130 | 9248 | struct ppc_dyn_relocs *p; |
65f38f15 | 9249 | |
6edfbbad | 9250 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) |
65f38f15 | 9251 | { |
ec338859 AM |
9252 | if (!bfd_is_abs_section (p->sec) |
9253 | && bfd_is_abs_section (p->sec->output_section)) | |
9254 | { | |
9255 | /* Input section has been discarded, either because | |
9256 | it is a copy of a linkonce section or due to | |
9257 | linker script /DISCARD/, so we'll be discarding | |
9258 | the relocs too. */ | |
9259 | } | |
248866a8 | 9260 | else if (p->count != 0) |
ec338859 | 9261 | { |
19e08130 AM |
9262 | asection *srel = elf_section_data (p->sec)->sreloc; |
9263 | if (p->ifunc) | |
33e44f2e | 9264 | srel = htab->elf.irelplt; |
eea6121a | 9265 | srel->size += p->count * sizeof (Elf64_External_Rela); |
248866a8 AM |
9266 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
9267 | info->flags |= DF_TEXTREL; | |
ec338859 | 9268 | } |
65f38f15 AM |
9269 | } |
9270 | } | |
9271 | ||
411e1bfb AM |
9272 | lgot_ents = elf_local_got_ents (ibfd); |
9273 | if (!lgot_ents) | |
65f38f15 AM |
9274 | continue; |
9275 | ||
0ffa91dd | 9276 | symtab_hdr = &elf_symtab_hdr (ibfd); |
65f38f15 | 9277 | locsymcount = symtab_hdr->sh_info; |
411e1bfb | 9278 | end_lgot_ents = lgot_ents + locsymcount; |
e054468f AM |
9279 | local_plt = (struct plt_entry **) end_lgot_ents; |
9280 | end_local_plt = local_plt + locsymcount; | |
f961d9dd | 9281 | lgot_masks = (unsigned char *) end_local_plt; |
e717da7e | 9282 | s = ppc64_elf_tdata (ibfd)->got; |
e7b938ca | 9283 | for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks) |
65f38f15 | 9284 | { |
0b8bcf0d | 9285 | struct got_entry **pent, *ent; |
411e1bfb | 9286 | |
0b8bcf0d AM |
9287 | pent = lgot_ents; |
9288 | while ((ent = *pent) != NULL) | |
411e1bfb AM |
9289 | if (ent->got.refcount > 0) |
9290 | { | |
e7b938ca | 9291 | if ((ent->tls_type & *lgot_masks & TLS_LD) != 0) |
411e1bfb | 9292 | { |
927be08e | 9293 | ppc64_tlsld_got (ibfd)->got.refcount += 1; |
0b8bcf0d | 9294 | *pent = ent->next; |
411e1bfb AM |
9295 | } |
9296 | else | |
9297 | { | |
19e08130 AM |
9298 | unsigned int ent_size = 8; |
9299 | unsigned int rel_size = sizeof (Elf64_External_Rela); | |
9300 | ||
eea6121a | 9301 | ent->got.offset = s->size; |
e7b938ca | 9302 | if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) |
927be08e | 9303 | { |
19e08130 AM |
9304 | ent_size *= 2; |
9305 | rel_size *= 2; | |
9306 | } | |
9307 | s->size += ent_size; | |
37da22e5 | 9308 | if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC) |
19e08130 | 9309 | { |
33e44f2e | 9310 | htab->elf.irelplt->size += rel_size; |
19e08130 AM |
9311 | htab->got_reli_size += rel_size; |
9312 | } | |
f15d0b54 AM |
9313 | else if (bfd_link_pic (info) |
9314 | && !((ent->tls_type & TLS_TPREL) != 0 | |
9315 | && bfd_link_executable (info))) | |
19e08130 AM |
9316 | { |
9317 | asection *srel = ppc64_elf_tdata (ibfd)->relgot; | |
9318 | srel->size += rel_size; | |
927be08e | 9319 | } |
0b8bcf0d | 9320 | pent = &ent->next; |
411e1bfb AM |
9321 | } |
9322 | } | |
9323 | else | |
0b8bcf0d | 9324 | *pent = ent->next; |
65f38f15 | 9325 | } |
e054468f | 9326 | |
2d7ad24e AM |
9327 | /* Allocate space for plt calls to local syms. */ |
9328 | lgot_masks = (unsigned char *) end_local_plt; | |
9329 | for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks) | |
e054468f AM |
9330 | { |
9331 | struct plt_entry *ent; | |
9332 | ||
9333 | for (ent = *local_plt; ent != NULL; ent = ent->next) | |
9334 | if (ent->plt.refcount > 0) | |
9335 | { | |
2d7ad24e AM |
9336 | if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC) |
9337 | { | |
9338 | s = htab->elf.iplt; | |
9339 | ent->plt.offset = s->size; | |
9340 | s->size += PLT_ENTRY_SIZE (htab); | |
9341 | htab->elf.irelplt->size += sizeof (Elf64_External_Rela); | |
9342 | } | |
3e04d765 AM |
9343 | else if (htab->can_convert_all_inline_plt |
9344 | || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP) | |
2d7ad24e AM |
9345 | ent->plt.offset = (bfd_vma) -1; |
9346 | else | |
9347 | { | |
9348 | s = htab->pltlocal; | |
9349 | ent->plt.offset = s->size; | |
9350 | s->size += LOCAL_PLT_ENTRY_SIZE (htab); | |
9351 | if (bfd_link_pic (info)) | |
9352 | htab->relpltlocal->size += sizeof (Elf64_External_Rela); | |
9353 | } | |
e054468f AM |
9354 | } |
9355 | else | |
9356 | ent->plt.offset = (bfd_vma) -1; | |
9357 | } | |
65f38f15 AM |
9358 | } |
9359 | ||
9360 | /* Allocate global sym .plt and .got entries, and space for global | |
9361 | sym dynamic relocs. */ | |
4ce794b7 | 9362 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); |
a345bc8d | 9363 | |
0e1862bb | 9364 | if (!htab->opd_abi && !bfd_link_pic (info)) |
a345bc8d | 9365 | elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info); |
65f38f15 | 9366 | |
7865406b | 9367 | first_tlsld = NULL; |
c72f2fb2 | 9368 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
102890f0 | 9369 | { |
7865406b AM |
9370 | struct got_entry *ent; |
9371 | ||
0c8d6e5c | 9372 | if (!is_ppc64_elf (ibfd)) |
102890f0 AM |
9373 | continue; |
9374 | ||
7865406b AM |
9375 | ent = ppc64_tlsld_got (ibfd); |
9376 | if (ent->got.refcount > 0) | |
102890f0 | 9377 | { |
7865406b | 9378 | if (!htab->do_multi_toc && first_tlsld != NULL) |
102890f0 | 9379 | { |
7865406b AM |
9380 | ent->is_indirect = TRUE; |
9381 | ent->got.ent = first_tlsld; | |
9382 | } | |
9383 | else | |
9384 | { | |
9385 | if (first_tlsld == NULL) | |
9386 | first_tlsld = ent; | |
9387 | s = ppc64_elf_tdata (ibfd)->got; | |
9388 | ent->got.offset = s->size; | |
9389 | ent->owner = ibfd; | |
9390 | s->size += 16; | |
0e1862bb | 9391 | if (bfd_link_pic (info)) |
7865406b AM |
9392 | { |
9393 | asection *srel = ppc64_elf_tdata (ibfd)->relgot; | |
9394 | srel->size += sizeof (Elf64_External_Rela); | |
9395 | } | |
102890f0 AM |
9396 | } |
9397 | } | |
9398 | else | |
7865406b | 9399 | ent->got.offset = (bfd_vma) -1; |
102890f0 AM |
9400 | } |
9401 | ||
65f38f15 AM |
9402 | /* We now have determined the sizes of the various dynamic sections. |
9403 | Allocate memory for them. */ | |
b34976b6 | 9404 | relocs = FALSE; |
65f38f15 AM |
9405 | for (s = dynobj->sections; s != NULL; s = s->next) |
9406 | { | |
9407 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
9408 | continue; | |
9409 | ||
4ce794b7 | 9410 | if (s == htab->brlt || s == htab->relbrlt) |
721956f4 AM |
9411 | /* These haven't been allocated yet; don't strip. */ |
9412 | continue; | |
33e44f2e AM |
9413 | else if (s == htab->elf.sgot |
9414 | || s == htab->elf.splt | |
9415 | || s == htab->elf.iplt | |
2d7ad24e | 9416 | || s == htab->pltlocal |
c456f082 | 9417 | || s == htab->glink |
9e390558 | 9418 | || s == htab->global_entry |
5474d94f AM |
9419 | || s == htab->elf.sdynbss |
9420 | || s == htab->elf.sdynrelro) | |
65f38f15 AM |
9421 | { |
9422 | /* Strip this section if we don't need it; see the | |
9423 | comment below. */ | |
5bd4f169 | 9424 | } |
58d180e8 AM |
9425 | else if (s == htab->glink_eh_frame) |
9426 | { | |
9427 | if (!bfd_is_abs_section (s->output_section)) | |
9428 | /* Not sized yet. */ | |
9429 | continue; | |
9430 | } | |
70cc837d | 9431 | else if (CONST_STRNEQ (s->name, ".rela")) |
5bd4f169 | 9432 | { |
c456f082 | 9433 | if (s->size != 0) |
5bd4f169 | 9434 | { |
33e44f2e | 9435 | if (s != htab->elf.srelplt) |
b34976b6 | 9436 | relocs = TRUE; |
5bd4f169 AM |
9437 | |
9438 | /* We use the reloc_count field as a counter if we need | |
9439 | to copy relocs into the output file. */ | |
9440 | s->reloc_count = 0; | |
9441 | } | |
9442 | } | |
65f38f15 | 9443 | else |
5bd4f169 AM |
9444 | { |
9445 | /* It's not one of our sections, so don't allocate space. */ | |
9446 | continue; | |
9447 | } | |
9448 | ||
eea6121a | 9449 | if (s->size == 0) |
5bd4f169 | 9450 | { |
c456f082 AM |
9451 | /* If we don't need this section, strip it from the |
9452 | output file. This is mostly to handle .rela.bss and | |
9453 | .rela.plt. We must create both sections in | |
9454 | create_dynamic_sections, because they must be created | |
9455 | before the linker maps input sections to output | |
9456 | sections. The linker does that before | |
9457 | adjust_dynamic_symbol is called, and it is that | |
9458 | function which decides whether anything needs to go | |
9459 | into these sections. */ | |
8423293d | 9460 | s->flags |= SEC_EXCLUDE; |
5bd4f169 AM |
9461 | continue; |
9462 | } | |
9463 | ||
06bcf541 AM |
9464 | if (bfd_is_abs_section (s->output_section)) |
9465 | _bfd_error_handler (_("warning: discarding dynamic section %s"), | |
9466 | s->name); | |
9467 | ||
c456f082 | 9468 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
5f333394 AM |
9469 | continue; |
9470 | ||
65f38f15 AM |
9471 | /* Allocate memory for the section contents. We use bfd_zalloc |
9472 | here in case unused entries are not reclaimed before the | |
9473 | section's contents are written out. This should not happen, | |
411e1bfb AM |
9474 | but this way if it does we get a R_PPC64_NONE reloc in .rela |
9475 | sections instead of garbage. | |
9476 | We also rely on the section contents being zero when writing | |
5474d94f | 9477 | the GOT and .dynrelro. */ |
eea6121a | 9478 | s->contents = bfd_zalloc (dynobj, s->size); |
65f38f15 | 9479 | if (s->contents == NULL) |
b34976b6 | 9480 | return FALSE; |
5bd4f169 AM |
9481 | } |
9482 | ||
c72f2fb2 | 9483 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
e717da7e | 9484 | { |
0c8d6e5c | 9485 | if (!is_ppc64_elf (ibfd)) |
7b53ace3 AM |
9486 | continue; |
9487 | ||
e717da7e | 9488 | s = ppc64_elf_tdata (ibfd)->got; |
33e44f2e | 9489 | if (s != NULL && s != htab->elf.sgot) |
e717da7e | 9490 | { |
eea6121a | 9491 | if (s->size == 0) |
8423293d | 9492 | s->flags |= SEC_EXCLUDE; |
e717da7e AM |
9493 | else |
9494 | { | |
eea6121a | 9495 | s->contents = bfd_zalloc (ibfd, s->size); |
e717da7e AM |
9496 | if (s->contents == NULL) |
9497 | return FALSE; | |
9498 | } | |
9499 | } | |
9500 | s = ppc64_elf_tdata (ibfd)->relgot; | |
9501 | if (s != NULL) | |
9502 | { | |
eea6121a | 9503 | if (s->size == 0) |
8423293d | 9504 | s->flags |= SEC_EXCLUDE; |
e717da7e AM |
9505 | else |
9506 | { | |
eea6121a | 9507 | s->contents = bfd_zalloc (ibfd, s->size); |
e717da7e AM |
9508 | if (s->contents == NULL) |
9509 | return FALSE; | |
9510 | relocs = TRUE; | |
9511 | s->reloc_count = 0; | |
9512 | } | |
9513 | } | |
9514 | } | |
9515 | ||
e86ce104 | 9516 | if (htab->elf.dynamic_sections_created) |
5bd4f169 | 9517 | { |
e8910a83 AM |
9518 | bfd_boolean tls_opt; |
9519 | ||
5bd4f169 AM |
9520 | /* Add some entries to the .dynamic section. We fill in the |
9521 | values later, in ppc64_elf_finish_dynamic_sections, but we | |
9522 | must add the entries now so that we get the correct size for | |
9523 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
9524 | dynamic linker and used by the debugger. */ | |
dc810e39 | 9525 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 9526 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 9527 | |
0e1862bb | 9528 | if (bfd_link_executable (info)) |
5bd4f169 | 9529 | { |
dc810e39 | 9530 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 9531 | return FALSE; |
5bd4f169 AM |
9532 | } |
9533 | ||
33e44f2e | 9534 | if (htab->elf.splt != NULL && htab->elf.splt->size != 0) |
5bd4f169 | 9535 | { |
dc810e39 AM |
9536 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
9537 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
9538 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
5d1634d7 AM |
9539 | || !add_dynamic_entry (DT_JMPREL, 0) |
9540 | || !add_dynamic_entry (DT_PPC64_GLINK, 0)) | |
b34976b6 | 9541 | return FALSE; |
5bd4f169 AM |
9542 | } |
9543 | ||
ee67d69a | 9544 | if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1) |
19397422 AM |
9545 | { |
9546 | if (!add_dynamic_entry (DT_PPC64_OPD, 0) | |
9547 | || !add_dynamic_entry (DT_PPC64_OPDSZ, 0)) | |
b34976b6 | 9548 | return FALSE; |
19397422 AM |
9549 | } |
9550 | ||
7c9cf415 | 9551 | tls_opt = (htab->params->tls_get_addr_opt |
e8910a83 AM |
9552 | && htab->tls_get_addr_fd != NULL |
9553 | && htab->tls_get_addr_fd->elf.plt.plist != NULL); | |
9554 | if (tls_opt || !htab->opd_abi) | |
9555 | { | |
9556 | if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0)) | |
9557 | return FALSE; | |
9558 | } | |
a7f2871e | 9559 | |
5bd4f169 AM |
9560 | if (relocs) |
9561 | { | |
dc810e39 AM |
9562 | if (!add_dynamic_entry (DT_RELA, 0) |
9563 | || !add_dynamic_entry (DT_RELASZ, 0) | |
9564 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 9565 | return FALSE; |
5bd4f169 | 9566 | |
65f38f15 AM |
9567 | /* If any dynamic relocs apply to a read-only section, |
9568 | then we need a DT_TEXTREL entry. */ | |
248866a8 | 9569 | if ((info->flags & DF_TEXTREL) == 0) |
a345bc8d | 9570 | elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); |
5bd4f169 | 9571 | |
65f38f15 | 9572 | if ((info->flags & DF_TEXTREL) != 0) |
5bd4f169 | 9573 | { |
65f38f15 | 9574 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 9575 | return FALSE; |
5bd4f169 | 9576 | } |
5bd4f169 | 9577 | } |
5bd4f169 | 9578 | } |
65f38f15 | 9579 | #undef add_dynamic_entry |
5bd4f169 | 9580 | |
b34976b6 | 9581 | return TRUE; |
5bd4f169 AM |
9582 | } |
9583 | ||
a345bc8d AM |
9584 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
9585 | ||
9586 | static bfd_boolean | |
9587 | ppc64_elf_hash_symbol (struct elf_link_hash_entry *h) | |
9588 | { | |
9589 | if (h->plt.plist != NULL | |
9590 | && !h->def_regular | |
9591 | && !h->pointer_equality_needed) | |
9592 | return FALSE; | |
9593 | ||
9594 | return _bfd_elf_hash_symbol (h); | |
9595 | } | |
9596 | ||
721956f4 | 9597 | /* Determine the type of stub needed, if any, for a call. */ |
5bd4f169 | 9598 | |
4ce794b7 AM |
9599 | static inline enum ppc_stub_type |
9600 | ppc_type_of_stub (asection *input_sec, | |
9601 | const Elf_Internal_Rela *rel, | |
9602 | struct ppc_link_hash_entry **hash, | |
e054468f | 9603 | struct plt_entry **plt_ent, |
6911b7dc AM |
9604 | bfd_vma destination, |
9605 | unsigned long local_off) | |
5bd4f169 | 9606 | { |
721956f4 AM |
9607 | struct ppc_link_hash_entry *h = *hash; |
9608 | bfd_vma location; | |
9609 | bfd_vma branch_offset; | |
9610 | bfd_vma max_branch_offset; | |
4ce794b7 | 9611 | enum elf_ppc64_reloc_type r_type; |
5bd4f169 | 9612 | |
721956f4 AM |
9613 | if (h != NULL) |
9614 | { | |
e054468f | 9615 | struct plt_entry *ent; |
7fe2b9a6 | 9616 | struct ppc_link_hash_entry *fdh = h; |
b31867b6 AM |
9617 | if (h->oh != NULL |
9618 | && h->oh->is_func_descriptor) | |
7b8f6675 AM |
9619 | { |
9620 | fdh = ppc_follow_link (h->oh); | |
9621 | *hash = fdh; | |
9622 | } | |
8387904d | 9623 | |
e054468f AM |
9624 | for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next) |
9625 | if (ent->addend == rel->r_addend | |
9626 | && ent->plt.offset != (bfd_vma) -1) | |
9627 | { | |
e054468f AM |
9628 | *plt_ent = ent; |
9629 | return ppc_stub_plt_call; | |
9630 | } | |
5bd4f169 | 9631 | |
7fe2b9a6 AM |
9632 | /* Here, we know we don't have a plt entry. If we don't have a |
9633 | either a defined function descriptor or a defined entry symbol | |
9634 | in a regular object file, then it is pointless trying to make | |
9635 | any other type of stub. */ | |
854b41e7 AM |
9636 | if (!is_static_defined (&fdh->elf) |
9637 | && !is_static_defined (&h->elf)) | |
721956f4 | 9638 | return ppc_stub_none; |
5d1634d7 | 9639 | } |
e054468f AM |
9640 | else if (elf_local_got_ents (input_sec->owner) != NULL) |
9641 | { | |
9642 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner); | |
9643 | struct plt_entry **local_plt = (struct plt_entry **) | |
9644 | elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info; | |
9645 | unsigned long r_symndx = ELF64_R_SYM (rel->r_info); | |
9646 | ||
9647 | if (local_plt[r_symndx] != NULL) | |
9648 | { | |
9649 | struct plt_entry *ent; | |
9650 | ||
9651 | for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next) | |
9652 | if (ent->addend == rel->r_addend | |
9653 | && ent->plt.offset != (bfd_vma) -1) | |
9654 | { | |
9655 | *plt_ent = ent; | |
9656 | return ppc_stub_plt_call; | |
9657 | } | |
9658 | } | |
9659 | } | |
5d1634d7 | 9660 | |
721956f4 AM |
9661 | /* Determine where the call point is. */ |
9662 | location = (input_sec->output_offset | |
9663 | + input_sec->output_section->vma | |
9664 | + rel->r_offset); | |
5d1634d7 | 9665 | |
721956f4 AM |
9666 | branch_offset = destination - location; |
9667 | r_type = ELF64_R_TYPE (rel->r_info); | |
5d1634d7 | 9668 | |
721956f4 AM |
9669 | /* Determine if a long branch stub is needed. */ |
9670 | max_branch_offset = 1 << 25; | |
23cedd1d AM |
9671 | if (r_type == R_PPC64_REL14 |
9672 | || r_type == R_PPC64_REL14_BRTAKEN | |
9673 | || r_type == R_PPC64_REL14_BRNTAKEN) | |
721956f4 | 9674 | max_branch_offset = 1 << 15; |
5d1634d7 | 9675 | |
6911b7dc | 9676 | if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off) |
721956f4 AM |
9677 | /* We need a stub. Figure out whether a long_branch or plt_branch |
9678 | is needed later. */ | |
9679 | return ppc_stub_long_branch; | |
5d1634d7 | 9680 | |
721956f4 | 9681 | return ppc_stub_none; |
5d1634d7 AM |
9682 | } |
9683 | ||
f891966f AM |
9684 | /* Gets the address of a label (1:) in r11 and builds an offset in r12, |
9685 | then adds it to r11 (LOAD false) or loads r12 from r11+r12 (LOAD true). | |
9686 | . mflr %r12 | |
9687 | . bcl 20,31,1f | |
9688 | .1: mflr %r11 | |
9689 | . mtlr %r12 | |
05d0e962 | 9690 | . lis %r12,xxx-1b@highest |
f891966f | 9691 | . ori %r12,%r12,xxx-1b@higher |
05d0e962 | 9692 | . sldi %r12,%r12,32 |
f891966f | 9693 | . oris %r12,%r12,xxx-1b@high |
05d0e962 | 9694 | . ori %r12,%r12,xxx-1b@l |
f891966f | 9695 | . add/ldx %r12,%r11,%r12 */ |
05d0e962 AM |
9696 | |
9697 | static bfd_byte * | |
9698 | build_offset (bfd *abfd, bfd_byte *p, bfd_vma off, bfd_boolean load) | |
9699 | { | |
f891966f AM |
9700 | bfd_put_32 (abfd, MFLR_R12, p); |
9701 | p += 4; | |
9702 | bfd_put_32 (abfd, BCL_20_31, p); | |
9703 | p += 4; | |
9704 | bfd_put_32 (abfd, MFLR_R11, p); | |
9705 | p += 4; | |
9706 | bfd_put_32 (abfd, MTLR_R12, p); | |
9707 | p += 4; | |
05d0e962 AM |
9708 | if (off + 0x8000 < 0x10000) |
9709 | { | |
9710 | if (load) | |
9711 | bfd_put_32 (abfd, LD_R12_0R11 + PPC_LO (off), p); | |
9712 | else | |
9713 | bfd_put_32 (abfd, ADDI_R12_R11 + PPC_LO (off), p); | |
9714 | p += 4; | |
9715 | } | |
9716 | else if (off + 0x80008000ULL < 0x100000000ULL) | |
9717 | { | |
9718 | bfd_put_32 (abfd, ADDIS_R12_R11 + PPC_HA (off), p); | |
9719 | p += 4; | |
9720 | if (load) | |
9721 | bfd_put_32 (abfd, LD_R12_0R12 + PPC_LO (off), p); | |
9722 | else | |
9723 | bfd_put_32 (abfd, ADDI_R12_R12 + PPC_LO (off), p); | |
9724 | p += 4; | |
9725 | } | |
9726 | else | |
9727 | { | |
9728 | if (off + 0x800000000000ULL < 0x1000000000000ULL) | |
9729 | { | |
9730 | bfd_put_32 (abfd, LI_R12_0 + ((off >> 32) & 0xffff), p); | |
9731 | p += 4; | |
9732 | } | |
9733 | else | |
9734 | { | |
9735 | bfd_put_32 (abfd, LIS_R12 + ((off >> 48) & 0xffff), p); | |
9736 | p += 4; | |
9737 | if (((off >> 32) & 0xffff) != 0) | |
9738 | { | |
9739 | bfd_put_32 (abfd, ORI_R12_R12_0 + ((off >> 32) & 0xffff), p); | |
9740 | p += 4; | |
9741 | } | |
9742 | } | |
9743 | if (((off >> 32) & 0xffffffffULL) != 0) | |
9744 | { | |
9745 | bfd_put_32 (abfd, SLDI_R12_R12_32, p); | |
9746 | p += 4; | |
9747 | } | |
9748 | if (PPC_HI (off) != 0) | |
9749 | { | |
9750 | bfd_put_32 (abfd, ORIS_R12_R12_0 + PPC_HI (off), p); | |
9751 | p += 4; | |
9752 | } | |
9753 | if (PPC_LO (off) != 0) | |
9754 | { | |
9755 | bfd_put_32 (abfd, ORI_R12_R12_0 + PPC_LO (off), p); | |
9756 | p += 4; | |
9757 | } | |
9758 | if (load) | |
9759 | bfd_put_32 (abfd, LDX_R12_R11_R12, p); | |
9760 | else | |
9761 | bfd_put_32 (abfd, ADD_R12_R11_R12, p); | |
9762 | p += 4; | |
9763 | } | |
9764 | return p; | |
9765 | } | |
9766 | ||
9767 | static unsigned int | |
9768 | size_offset (bfd_vma off) | |
9769 | { | |
9770 | unsigned int size; | |
9771 | if (off + 0x8000 < 0x10000) | |
9772 | size = 4; | |
9773 | else if (off + 0x80008000ULL < 0x100000000ULL) | |
9774 | size = 8; | |
9775 | else | |
9776 | { | |
9777 | if (off + 0x800000000000ULL < 0x1000000000000ULL) | |
9778 | size = 4; | |
9779 | else | |
9780 | { | |
9781 | size = 4; | |
9782 | if (((off >> 32) & 0xffff) != 0) | |
9783 | size += 4; | |
9784 | } | |
9785 | if (((off >> 32) & 0xffffffffULL) != 0) | |
9786 | size += 4; | |
9787 | if (PPC_HI (off) != 0) | |
9788 | size += 4; | |
9789 | if (PPC_LO (off) != 0) | |
9790 | size += 4; | |
9791 | size += 4; | |
9792 | } | |
f891966f | 9793 | return size + 16; |
05d0e962 AM |
9794 | } |
9795 | ||
3d58e1fc AM |
9796 | static unsigned int |
9797 | num_relocs_for_offset (bfd_vma off) | |
9798 | { | |
9799 | unsigned int num_rel; | |
9800 | if (off + 0x8000 < 0x10000) | |
9801 | num_rel = 1; | |
9802 | else if (off + 0x80008000ULL < 0x100000000ULL) | |
9803 | num_rel = 2; | |
9804 | else | |
9805 | { | |
9806 | num_rel = 1; | |
9807 | if (off + 0x800000000000ULL >= 0x1000000000000ULL | |
9808 | && ((off >> 32) & 0xffff) != 0) | |
9809 | num_rel += 1; | |
9810 | if (PPC_HI (off) != 0) | |
9811 | num_rel += 1; | |
9812 | if (PPC_LO (off) != 0) | |
9813 | num_rel += 1; | |
9814 | } | |
9815 | return num_rel; | |
9816 | } | |
9817 | ||
9818 | static Elf_Internal_Rela * | |
9819 | emit_relocs_for_offset (struct bfd_link_info *info, Elf_Internal_Rela *r, | |
9820 | bfd_vma roff, bfd_vma targ, bfd_vma off) | |
9821 | { | |
9822 | bfd_vma relative_targ = targ - (roff - 8); | |
9823 | if (bfd_big_endian (info->output_bfd)) | |
9824 | roff += 2; | |
9825 | r->r_offset = roff; | |
9826 | r->r_addend = relative_targ + roff; | |
9827 | if (off + 0x8000 < 0x10000) | |
9828 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16); | |
9829 | else if (off + 0x80008000ULL < 0x100000000ULL) | |
9830 | { | |
9831 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HA); | |
9832 | ++r; | |
9833 | roff += 4; | |
9834 | r->r_offset = roff; | |
9835 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_LO); | |
9836 | r->r_addend = relative_targ + roff; | |
9837 | } | |
9838 | else | |
9839 | { | |
9840 | if (off + 0x800000000000ULL < 0x1000000000000ULL) | |
9841 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHER); | |
9842 | else | |
9843 | { | |
9844 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHEST); | |
9845 | if (((off >> 32) & 0xffff) != 0) | |
9846 | { | |
9847 | ++r; | |
9848 | roff += 4; | |
9849 | r->r_offset = roff; | |
9850 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHER); | |
9851 | r->r_addend = relative_targ + roff; | |
9852 | } | |
9853 | } | |
9854 | if (((off >> 32) & 0xffffffffULL) != 0) | |
9855 | roff += 4; | |
9856 | if (PPC_HI (off) != 0) | |
9857 | { | |
9858 | ++r; | |
9859 | roff += 4; | |
9860 | r->r_offset = roff; | |
9861 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGH); | |
9862 | r->r_addend = relative_targ + roff; | |
9863 | } | |
9864 | if (PPC_LO (off) != 0) | |
9865 | { | |
9866 | ++r; | |
9867 | roff += 4; | |
9868 | r->r_offset = roff; | |
9869 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_LO); | |
9870 | r->r_addend = relative_targ + roff; | |
9871 | } | |
9872 | } | |
9873 | return r; | |
9874 | } | |
9875 | ||
df136d64 AM |
9876 | /* Emit .eh_frame opcode to advance pc by DELTA. */ |
9877 | ||
9878 | static bfd_byte * | |
9879 | eh_advance (bfd *abfd, bfd_byte *eh, unsigned int delta) | |
9880 | { | |
9881 | delta /= 4; | |
9882 | if (delta < 64) | |
9883 | *eh++ = DW_CFA_advance_loc + delta; | |
9884 | else if (delta < 256) | |
9885 | { | |
9886 | *eh++ = DW_CFA_advance_loc1; | |
9887 | *eh++ = delta; | |
9888 | } | |
9889 | else if (delta < 65536) | |
9890 | { | |
9891 | *eh++ = DW_CFA_advance_loc2; | |
9892 | bfd_put_16 (abfd, delta, eh); | |
9893 | eh += 2; | |
9894 | } | |
9895 | else | |
9896 | { | |
9897 | *eh++ = DW_CFA_advance_loc4; | |
9898 | bfd_put_32 (abfd, delta, eh); | |
9899 | eh += 4; | |
9900 | } | |
9901 | return eh; | |
9902 | } | |
9903 | ||
9904 | /* Size of required .eh_frame opcode to advance pc by DELTA. */ | |
9905 | ||
9906 | static unsigned int | |
9907 | eh_advance_size (unsigned int delta) | |
9908 | { | |
9909 | if (delta < 64 * 4) | |
9910 | /* DW_CFA_advance_loc+[1..63]. */ | |
9911 | return 1; | |
9912 | if (delta < 256 * 4) | |
9913 | /* DW_CFA_advance_loc1, byte. */ | |
9914 | return 2; | |
9915 | if (delta < 65536 * 4) | |
9916 | /* DW_CFA_advance_loc2, 2 bytes. */ | |
9917 | return 3; | |
9918 | /* DW_CFA_advance_loc4, 4 bytes. */ | |
9919 | return 5; | |
9920 | } | |
9921 | ||
794e51c0 AM |
9922 | /* With power7 weakly ordered memory model, it is possible for ld.so |
9923 | to update a plt entry in one thread and have another thread see a | |
9924 | stale zero toc entry. To avoid this we need some sort of acquire | |
9925 | barrier in the call stub. One solution is to make the load of the | |
9926 | toc word seem to appear to depend on the load of the function entry | |
9927 | word. Another solution is to test for r2 being zero, and branch to | |
9928 | the appropriate glink entry if so. | |
9929 | ||
9930 | . fake dep barrier compare | |
71a39c98 AM |
9931 | . ld 12,xxx(2) ld 12,xxx(2) |
9932 | . mtctr 12 mtctr 12 | |
9933 | . xor 11,12,12 ld 2,xxx+8(2) | |
794e51c0 AM |
9934 | . add 2,2,11 cmpldi 2,0 |
9935 | . ld 2,xxx+8(2) bnectr+ | |
9936 | . bctr b <glink_entry> | |
9937 | ||
9938 | The solution involving the compare turns out to be faster, so | |
9939 | that's what we use unless the branch won't reach. */ | |
9940 | ||
9941 | #define ALWAYS_USE_FAKE_DEP 0 | |
9942 | #define ALWAYS_EMIT_R2SAVE 0 | |
5d1634d7 | 9943 | |
794e51c0 AM |
9944 | static inline unsigned int |
9945 | plt_stub_size (struct ppc_link_hash_table *htab, | |
9946 | struct ppc_stub_hash_entry *stub_entry, | |
9947 | bfd_vma off) | |
9948 | { | |
05d0e962 | 9949 | unsigned size; |
b9e5796b | 9950 | |
05d0e962 AM |
9951 | if (stub_entry->stub_type >= ppc_stub_plt_call_notoc) |
9952 | { | |
f891966f | 9953 | size = 8 + size_offset (off - 8); |
05d0e962 AM |
9954 | if (stub_entry->stub_type > ppc_stub_plt_call_notoc) |
9955 | size += 4; | |
9956 | return size; | |
9957 | } | |
9958 | ||
9959 | size = 12; | |
b9e5796b AM |
9960 | if (ALWAYS_EMIT_R2SAVE |
9961 | || stub_entry->stub_type == ppc_stub_plt_call_r2save) | |
9962 | size += 4; | |
9963 | if (PPC_HA (off) != 0) | |
794e51c0 | 9964 | size += 4; |
b9e5796b AM |
9965 | if (htab->opd_abi) |
9966 | { | |
9967 | size += 4; | |
e7d1c40c | 9968 | if (htab->params->plt_static_chain) |
b9e5796b | 9969 | size += 4; |
bd4d2eaa AM |
9970 | if (htab->params->plt_thread_safe |
9971 | && htab->elf.dynamic_sections_created | |
9972 | && stub_entry->h != NULL | |
9973 | && stub_entry->h->elf.dynindx != -1) | |
b9e5796b | 9974 | size += 8; |
e7d1c40c | 9975 | if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off)) |
b9e5796b AM |
9976 | size += 4; |
9977 | } | |
794e51c0 AM |
9978 | if (stub_entry->h != NULL |
9979 | && (stub_entry->h == htab->tls_get_addr_fd | |
9980 | || stub_entry->h == htab->tls_get_addr) | |
7c9cf415 | 9981 | && htab->params->tls_get_addr_opt) |
f378ab09 AM |
9982 | { |
9983 | size += 7 * 4; | |
e81b4c93 | 9984 | if (stub_entry->stub_type == ppc_stub_plt_call_r2save) |
407aa07c | 9985 | size += 6 * 4; |
f378ab09 | 9986 | } |
794e51c0 AM |
9987 | return size; |
9988 | } | |
9989 | ||
2420fff6 AM |
9990 | /* Depending on the sign of plt_stub_align: |
9991 | If positive, return the padding to align to a 2**plt_stub_align | |
9992 | boundary. | |
9993 | If negative, if this stub would cross fewer 2**plt_stub_align | |
9994 | boundaries if we align, then return the padding needed to do so. */ | |
9995 | ||
794e51c0 AM |
9996 | static inline unsigned int |
9997 | plt_stub_pad (struct ppc_link_hash_table *htab, | |
9998 | struct ppc_stub_hash_entry *stub_entry, | |
9999 | bfd_vma plt_off) | |
10000 | { | |
2420fff6 | 10001 | int stub_align; |
1aa42141 | 10002 | unsigned stub_size; |
6f20ed8a | 10003 | bfd_vma stub_off = stub_entry->group->stub_sec->size; |
794e51c0 | 10004 | |
2420fff6 AM |
10005 | if (htab->params->plt_stub_align >= 0) |
10006 | { | |
10007 | stub_align = 1 << htab->params->plt_stub_align; | |
10008 | if ((stub_off & (stub_align - 1)) != 0) | |
10009 | return stub_align - (stub_off & (stub_align - 1)); | |
10010 | return 0; | |
10011 | } | |
10012 | ||
10013 | stub_align = 1 << -htab->params->plt_stub_align; | |
1aa42141 | 10014 | stub_size = plt_stub_size (htab, stub_entry, plt_off); |
794e51c0 | 10015 | if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align) |
e05fa0ba | 10016 | > ((stub_size - 1) & -stub_align)) |
794e51c0 AM |
10017 | return stub_align - (stub_off & (stub_align - 1)); |
10018 | return 0; | |
10019 | } | |
10020 | ||
10021 | /* Build a .plt call stub. */ | |
10022 | ||
10023 | static inline bfd_byte * | |
10024 | build_plt_stub (struct ppc_link_hash_table *htab, | |
10025 | struct ppc_stub_hash_entry *stub_entry, | |
10026 | bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r) | |
10027 | { | |
e7d1c40c | 10028 | bfd *obfd = htab->params->stub_bfd; |
b9e5796b | 10029 | bfd_boolean plt_load_toc = htab->opd_abi; |
e7d1c40c | 10030 | bfd_boolean plt_static_chain = htab->params->plt_static_chain; |
bd4d2eaa AM |
10031 | bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe |
10032 | && htab->elf.dynamic_sections_created | |
10033 | && stub_entry->h != NULL | |
10034 | && stub_entry->h->elf.dynindx != -1); | |
794e51c0 AM |
10035 | bfd_boolean use_fake_dep = plt_thread_safe; |
10036 | bfd_vma cmp_branch_off = 0; | |
10037 | ||
10038 | if (!ALWAYS_USE_FAKE_DEP | |
b9e5796b | 10039 | && plt_load_toc |
794e51c0 | 10040 | && plt_thread_safe |
bd4d2eaa AM |
10041 | && !((stub_entry->h == htab->tls_get_addr_fd |
10042 | || stub_entry->h == htab->tls_get_addr) | |
7c9cf415 | 10043 | && htab->params->tls_get_addr_opt)) |
794e51c0 AM |
10044 | { |
10045 | bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1; | |
b9e5796b AM |
10046 | bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab)) |
10047 | / PLT_ENTRY_SIZE (htab)); | |
9e390558 | 10048 | bfd_vma glinkoff = GLINK_PLTRESOLVE_SIZE (htab) + pltindex * 8; |
794e51c0 AM |
10049 | bfd_vma to, from; |
10050 | ||
68d62958 AM |
10051 | if (pltindex > 32768) |
10052 | glinkoff += (pltindex - 32768) * 4; | |
794e51c0 AM |
10053 | to = (glinkoff |
10054 | + htab->glink->output_offset | |
10055 | + htab->glink->output_section->vma); | |
6f20ed8a | 10056 | from = (p - stub_entry->group->stub_sec->contents |
794e51c0 AM |
10057 | + 4 * (ALWAYS_EMIT_R2SAVE |
10058 | || stub_entry->stub_type == ppc_stub_plt_call_r2save) | |
10059 | + 4 * (PPC_HA (offset) != 0) | |
10060 | + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain) | |
10061 | != PPC_HA (offset)) | |
10062 | + 4 * (plt_static_chain != 0) | |
10063 | + 20 | |
6f20ed8a AM |
10064 | + stub_entry->group->stub_sec->output_offset |
10065 | + stub_entry->group->stub_sec->output_section->vma); | |
794e51c0 AM |
10066 | cmp_branch_off = to - from; |
10067 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); | |
10068 | } | |
10069 | ||
ac2df442 AM |
10070 | if (PPC_HA (offset) != 0) |
10071 | { | |
176a0d42 AM |
10072 | if (r != NULL) |
10073 | { | |
794e51c0 AM |
10074 | if (ALWAYS_EMIT_R2SAVE |
10075 | || stub_entry->stub_type == ppc_stub_plt_call_r2save) | |
10076 | r[0].r_offset += 4; | |
176a0d42 | 10077 | r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA); |
3b421ab3 | 10078 | r[1].r_offset = r[0].r_offset + 4; |
176a0d42 AM |
10079 | r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); |
10080 | r[1].r_addend = r[0].r_addend; | |
b9e5796b | 10081 | if (plt_load_toc) |
176a0d42 | 10082 | { |
b9e5796b | 10083 | if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) |
c7131b65 | 10084 | { |
b9e5796b AM |
10085 | r[2].r_offset = r[1].r_offset + 4; |
10086 | r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO); | |
10087 | r[2].r_addend = r[0].r_addend; | |
10088 | } | |
10089 | else | |
10090 | { | |
10091 | r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep; | |
10092 | r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); | |
10093 | r[2].r_addend = r[0].r_addend + 8; | |
10094 | if (plt_static_chain) | |
10095 | { | |
10096 | r[3].r_offset = r[2].r_offset + 4; | |
10097 | r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); | |
10098 | r[3].r_addend = r[0].r_addend + 16; | |
10099 | } | |
c7131b65 | 10100 | } |
176a0d42 AM |
10101 | } |
10102 | } | |
794e51c0 AM |
10103 | if (ALWAYS_EMIT_R2SAVE |
10104 | || stub_entry->stub_type == ppc_stub_plt_call_r2save) | |
a078d95a | 10105 | bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4; |
397998fc AM |
10106 | if (plt_load_toc) |
10107 | { | |
10108 | bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4; | |
10109 | bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4; | |
10110 | } | |
10111 | else | |
10112 | { | |
10113 | bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4; | |
10114 | bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4; | |
10115 | } | |
b9e5796b AM |
10116 | if (plt_load_toc |
10117 | && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) | |
ac2df442 | 10118 | { |
71a39c98 | 10119 | bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4; |
ac2df442 AM |
10120 | offset = 0; |
10121 | } | |
71a39c98 | 10122 | bfd_put_32 (obfd, MTCTR_R12, p), p += 4; |
b9e5796b | 10123 | if (plt_load_toc) |
794e51c0 | 10124 | { |
b9e5796b AM |
10125 | if (use_fake_dep) |
10126 | { | |
10127 | bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4; | |
10128 | bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4; | |
10129 | } | |
10130 | bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4; | |
10131 | if (plt_static_chain) | |
10132 | bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4; | |
794e51c0 | 10133 | } |
ac2df442 AM |
10134 | } |
10135 | else | |
10136 | { | |
176a0d42 AM |
10137 | if (r != NULL) |
10138 | { | |
794e51c0 AM |
10139 | if (ALWAYS_EMIT_R2SAVE |
10140 | || stub_entry->stub_type == ppc_stub_plt_call_r2save) | |
10141 | r[0].r_offset += 4; | |
176a0d42 | 10142 | r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); |
b9e5796b | 10143 | if (plt_load_toc) |
176a0d42 | 10144 | { |
b9e5796b | 10145 | if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) |
c7131b65 | 10146 | { |
b9e5796b AM |
10147 | r[1].r_offset = r[0].r_offset + 4; |
10148 | r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16); | |
10149 | r[1].r_addend = r[0].r_addend; | |
10150 | } | |
10151 | else | |
10152 | { | |
10153 | r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep; | |
10154 | r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); | |
10155 | r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain; | |
10156 | if (plt_static_chain) | |
10157 | { | |
10158 | r[2].r_offset = r[1].r_offset + 4; | |
10159 | r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); | |
10160 | r[2].r_addend = r[0].r_addend + 8; | |
10161 | } | |
c7131b65 | 10162 | } |
176a0d42 AM |
10163 | } |
10164 | } | |
794e51c0 AM |
10165 | if (ALWAYS_EMIT_R2SAVE |
10166 | || stub_entry->stub_type == ppc_stub_plt_call_r2save) | |
a078d95a | 10167 | bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4; |
71a39c98 | 10168 | bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4; |
b9e5796b AM |
10169 | if (plt_load_toc |
10170 | && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) | |
ac2df442 AM |
10171 | { |
10172 | bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4; | |
10173 | offset = 0; | |
10174 | } | |
71a39c98 | 10175 | bfd_put_32 (obfd, MTCTR_R12, p), p += 4; |
b9e5796b | 10176 | if (plt_load_toc) |
794e51c0 | 10177 | { |
b9e5796b AM |
10178 | if (use_fake_dep) |
10179 | { | |
10180 | bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4; | |
10181 | bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4; | |
10182 | } | |
10183 | if (plt_static_chain) | |
10184 | bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4; | |
10185 | bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4; | |
794e51c0 | 10186 | } |
ac2df442 | 10187 | } |
b9e5796b | 10188 | if (plt_load_toc && plt_thread_safe && !use_fake_dep) |
794e51c0 AM |
10189 | { |
10190 | bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4; | |
10191 | bfd_put_32 (obfd, BNECTR_P4, p), p += 4; | |
22aa0c7e | 10192 | bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4; |
794e51c0 AM |
10193 | } |
10194 | else | |
407aa07c | 10195 | bfd_put_32 (obfd, BCTR, p), p += 4; |
5d1634d7 AM |
10196 | return p; |
10197 | } | |
10198 | ||
a7f2871e AM |
10199 | /* Build a special .plt call stub for __tls_get_addr. */ |
10200 | ||
10201 | #define LD_R11_0R3 0xe9630000 | |
10202 | #define LD_R12_0R3 0xe9830000 | |
10203 | #define MR_R0_R3 0x7c601b78 | |
10204 | #define CMPDI_R11_0 0x2c2b0000 | |
10205 | #define ADD_R3_R12_R13 0x7c6c6a14 | |
10206 | #define BEQLR 0x4d820020 | |
10207 | #define MR_R3_R0 0x7c030378 | |
a7f2871e AM |
10208 | #define STD_R11_0R1 0xf9610000 |
10209 | #define BCTRL 0x4e800421 | |
10210 | #define LD_R11_0R1 0xe9610000 | |
a7f2871e AM |
10211 | #define MTLR_R11 0x7d6803a6 |
10212 | ||
10213 | static inline bfd_byte * | |
794e51c0 AM |
10214 | build_tls_get_addr_stub (struct ppc_link_hash_table *htab, |
10215 | struct ppc_stub_hash_entry *stub_entry, | |
10216 | bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r) | |
a7f2871e | 10217 | { |
e7d1c40c | 10218 | bfd *obfd = htab->params->stub_bfd; |
df136d64 | 10219 | bfd_byte *loc = p; |
794e51c0 | 10220 | |
a7f2871e AM |
10221 | bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4; |
10222 | bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4; | |
10223 | bfd_put_32 (obfd, MR_R0_R3, p), p += 4; | |
10224 | bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4; | |
10225 | bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4; | |
10226 | bfd_put_32 (obfd, BEQLR, p), p += 4; | |
10227 | bfd_put_32 (obfd, MR_R3_R0, p), p += 4; | |
f378ab09 AM |
10228 | if (r != NULL) |
10229 | r[0].r_offset += 7 * 4; | |
e81b4c93 | 10230 | if (stub_entry->stub_type != ppc_stub_plt_call_r2save) |
f378ab09 AM |
10231 | return build_plt_stub (htab, stub_entry, p, offset, r); |
10232 | ||
a7f2871e | 10233 | bfd_put_32 (obfd, MFLR_R11, p), p += 4; |
a078d95a | 10234 | bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4; |
a7f2871e AM |
10235 | |
10236 | if (r != NULL) | |
f378ab09 | 10237 | r[0].r_offset += 2 * 4; |
794e51c0 | 10238 | p = build_plt_stub (htab, stub_entry, p, offset, r); |
407aa07c | 10239 | bfd_put_32 (obfd, BCTRL, p - 4); |
a7f2871e | 10240 | |
a078d95a | 10241 | bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4; |
bd4d2eaa | 10242 | bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4; |
a7f2871e AM |
10243 | bfd_put_32 (obfd, MTLR_R11, p), p += 4; |
10244 | bfd_put_32 (obfd, BLR, p), p += 4; | |
10245 | ||
df136d64 AM |
10246 | if (htab->glink_eh_frame != NULL |
10247 | && htab->glink_eh_frame->size != 0) | |
10248 | { | |
10249 | bfd_byte *base, *eh; | |
10250 | unsigned int lr_used, delta; | |
10251 | ||
10252 | base = htab->glink_eh_frame->contents + stub_entry->group->eh_base + 17; | |
10253 | eh = base + stub_entry->group->eh_size; | |
10254 | lr_used = stub_entry->stub_offset + (p - 20 - loc); | |
10255 | delta = lr_used - stub_entry->group->lr_restore; | |
10256 | stub_entry->group->lr_restore = lr_used + 16; | |
10257 | eh = eh_advance (htab->elf.dynobj, eh, delta); | |
10258 | *eh++ = DW_CFA_offset_extended_sf; | |
10259 | *eh++ = 65; | |
10260 | *eh++ = -(STK_LINKER (htab) / 8) & 0x7f; | |
10261 | *eh++ = DW_CFA_advance_loc + 4; | |
10262 | *eh++ = DW_CFA_restore_extended; | |
10263 | *eh++ = 65; | |
10264 | stub_entry->group->eh_size = eh - base; | |
10265 | } | |
a7f2871e AM |
10266 | return p; |
10267 | } | |
10268 | ||
176a0d42 AM |
10269 | static Elf_Internal_Rela * |
10270 | get_relocs (asection *sec, int count) | |
10271 | { | |
10272 | Elf_Internal_Rela *relocs; | |
10273 | struct bfd_elf_section_data *elfsec_data; | |
10274 | ||
10275 | elfsec_data = elf_section_data (sec); | |
10276 | relocs = elfsec_data->relocs; | |
10277 | if (relocs == NULL) | |
10278 | { | |
10279 | bfd_size_type relsize; | |
10280 | relsize = sec->reloc_count * sizeof (*relocs); | |
10281 | relocs = bfd_alloc (sec->owner, relsize); | |
10282 | if (relocs == NULL) | |
10283 | return NULL; | |
10284 | elfsec_data->relocs = relocs; | |
d4730f92 BS |
10285 | elfsec_data->rela.hdr = bfd_zalloc (sec->owner, |
10286 | sizeof (Elf_Internal_Shdr)); | |
10287 | if (elfsec_data->rela.hdr == NULL) | |
10288 | return NULL; | |
10289 | elfsec_data->rela.hdr->sh_size = (sec->reloc_count | |
10290 | * sizeof (Elf64_External_Rela)); | |
10291 | elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela); | |
176a0d42 AM |
10292 | sec->reloc_count = 0; |
10293 | } | |
10294 | relocs += sec->reloc_count; | |
10295 | sec->reloc_count += count; | |
10296 | return relocs; | |
10297 | } | |
10298 | ||
3d58e1fc AM |
10299 | /* Convert the relocs R[0] thru R[-NUM_REL+1], which are all no-symbol |
10300 | forms, to the equivalent relocs against the global symbol given by | |
10301 | STUB_ENTRY->H. */ | |
10302 | ||
10303 | static bfd_boolean | |
10304 | use_global_in_relocs (struct ppc_link_hash_table *htab, | |
10305 | struct ppc_stub_hash_entry *stub_entry, | |
10306 | Elf_Internal_Rela *r, unsigned int num_rel) | |
10307 | { | |
10308 | struct elf_link_hash_entry **hashes; | |
10309 | unsigned long symndx; | |
10310 | struct ppc_link_hash_entry *h; | |
10311 | bfd_vma symval; | |
10312 | ||
10313 | /* Relocs are always against symbols in their own object file. Fake | |
10314 | up global sym hashes for the stub bfd (which has no symbols). */ | |
10315 | hashes = elf_sym_hashes (htab->params->stub_bfd); | |
10316 | if (hashes == NULL) | |
10317 | { | |
10318 | bfd_size_type hsize; | |
10319 | ||
10320 | /* When called the first time, stub_globals will contain the | |
10321 | total number of symbols seen during stub sizing. After | |
10322 | allocating, stub_globals is used as an index to fill the | |
10323 | hashes array. */ | |
10324 | hsize = (htab->stub_globals + 1) * sizeof (*hashes); | |
10325 | hashes = bfd_zalloc (htab->params->stub_bfd, hsize); | |
10326 | if (hashes == NULL) | |
10327 | return FALSE; | |
10328 | elf_sym_hashes (htab->params->stub_bfd) = hashes; | |
10329 | htab->stub_globals = 1; | |
10330 | } | |
10331 | symndx = htab->stub_globals++; | |
10332 | h = stub_entry->h; | |
10333 | hashes[symndx] = &h->elf; | |
10334 | if (h->oh != NULL && h->oh->is_func) | |
10335 | h = ppc_follow_link (h->oh); | |
10336 | BFD_ASSERT (h->elf.root.type == bfd_link_hash_defined | |
10337 | || h->elf.root.type == bfd_link_hash_defweak); | |
10338 | symval = (h->elf.root.u.def.value | |
10339 | + h->elf.root.u.def.section->output_offset | |
10340 | + h->elf.root.u.def.section->output_section->vma); | |
10341 | while (num_rel-- != 0) | |
10342 | { | |
10343 | r->r_info = ELF64_R_INFO (symndx, ELF64_R_TYPE (r->r_info)); | |
10344 | if (h->elf.root.u.def.section != stub_entry->target_section) | |
10345 | { | |
10346 | /* H is an opd symbol. The addend must be zero, and the | |
10347 | branch reloc is the only one we can convert. */ | |
10348 | r->r_addend = 0; | |
10349 | break; | |
10350 | } | |
10351 | else | |
10352 | r->r_addend -= symval; | |
10353 | --r; | |
10354 | } | |
10355 | return TRUE; | |
10356 | } | |
10357 | ||
aa374f67 | 10358 | static bfd_vma |
25f53a85 | 10359 | get_r2off (struct bfd_link_info *info, |
aa374f67 AM |
10360 | struct ppc_stub_hash_entry *stub_entry) |
10361 | { | |
25f53a85 | 10362 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
6f20ed8a | 10363 | bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off; |
aa374f67 AM |
10364 | |
10365 | if (r2off == 0) | |
10366 | { | |
10367 | /* Support linking -R objects. Get the toc pointer from the | |
10368 | opd entry. */ | |
10369 | char buf[8]; | |
b9e5796b AM |
10370 | if (!htab->opd_abi) |
10371 | return r2off; | |
aa374f67 AM |
10372 | asection *opd = stub_entry->h->elf.root.u.def.section; |
10373 | bfd_vma opd_off = stub_entry->h->elf.root.u.def.value; | |
10374 | ||
10375 | if (strcmp (opd->name, ".opd") != 0 | |
10376 | || opd->reloc_count != 0) | |
10377 | { | |
2cdcc330 AM |
10378 | info->callbacks->einfo |
10379 | (_("%P: cannot find opd entry toc for `%pT'\n"), | |
10380 | stub_entry->h->elf.root.root.string); | |
aa374f67 | 10381 | bfd_set_error (bfd_error_bad_value); |
a7c49797 | 10382 | return (bfd_vma) -1; |
aa374f67 AM |
10383 | } |
10384 | if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8)) | |
a7c49797 | 10385 | return (bfd_vma) -1; |
aa374f67 | 10386 | r2off = bfd_get_64 (opd->owner, buf); |
25f53a85 | 10387 | r2off -= elf_gp (info->output_bfd); |
aa374f67 | 10388 | } |
6f20ed8a | 10389 | r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off; |
aa374f67 AM |
10390 | return r2off; |
10391 | } | |
10392 | ||
b34976b6 | 10393 | static bfd_boolean |
4ce794b7 | 10394 | ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
5d1634d7 | 10395 | { |
721956f4 AM |
10396 | struct ppc_stub_hash_entry *stub_entry; |
10397 | struct ppc_branch_hash_entry *br_entry; | |
5d1634d7 AM |
10398 | struct bfd_link_info *info; |
10399 | struct ppc_link_hash_table *htab; | |
721956f4 | 10400 | bfd_byte *loc; |
3d58e1fc | 10401 | bfd_byte *p, *relp; |
1aa42141 | 10402 | bfd_vma targ, off; |
176a0d42 | 10403 | Elf_Internal_Rela *r; |
e054468f | 10404 | asection *plt; |
3d58e1fc | 10405 | int num_rel; |
5d1634d7 | 10406 | |
721956f4 AM |
10407 | /* Massage our args to the form they really have. */ |
10408 | stub_entry = (struct ppc_stub_hash_entry *) gen_entry; | |
4ce794b7 | 10409 | info = in_arg; |
5d1634d7 | 10410 | |
5d1634d7 | 10411 | htab = ppc_hash_table (info); |
4dfe6ac6 NC |
10412 | if (htab == NULL) |
10413 | return FALSE; | |
5d1634d7 | 10414 | |
1aa42141 | 10415 | BFD_ASSERT (stub_entry->stub_offset >= stub_entry->group->stub_sec->size); |
6f20ed8a | 10416 | loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset; |
721956f4 | 10417 | |
4ce794b7 | 10418 | htab->stub_count[stub_entry->stub_type - 1] += 1; |
721956f4 | 10419 | switch (stub_entry->stub_type) |
5d1634d7 | 10420 | { |
721956f4 | 10421 | case ppc_stub_long_branch: |
ad8e1ba5 | 10422 | case ppc_stub_long_branch_r2off: |
721956f4 | 10423 | /* Branches are relative. This is where we are going to. */ |
1aa42141 | 10424 | targ = (stub_entry->target_value |
6911b7dc AM |
10425 | + stub_entry->target_section->output_offset |
10426 | + stub_entry->target_section->output_section->vma); | |
1aa42141 | 10427 | targ += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other); |
5d1634d7 | 10428 | |
721956f4 | 10429 | /* And this is where we are coming from. */ |
1aa42141 AM |
10430 | off = (stub_entry->stub_offset |
10431 | + stub_entry->group->stub_sec->output_offset | |
10432 | + stub_entry->group->stub_sec->output_section->vma); | |
10433 | off = targ - off; | |
e86ce104 | 10434 | |
9e390558 | 10435 | p = loc; |
ac2df442 | 10436 | if (stub_entry->stub_type == ppc_stub_long_branch_r2off) |
ad8e1ba5 | 10437 | { |
25f53a85 | 10438 | bfd_vma r2off = get_r2off (info, stub_entry); |
ad8e1ba5 | 10439 | |
a7c49797 | 10440 | if (r2off == (bfd_vma) -1) |
aa374f67 AM |
10441 | { |
10442 | htab->stub_error = TRUE; | |
10443 | return FALSE; | |
10444 | } | |
9e390558 AM |
10445 | bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p); |
10446 | p += 4; | |
ac2df442 AM |
10447 | if (PPC_HA (r2off) != 0) |
10448 | { | |
e7d1c40c | 10449 | bfd_put_32 (htab->params->stub_bfd, |
9e390558 AM |
10450 | ADDIS_R2_R2 | PPC_HA (r2off), p); |
10451 | p += 4; | |
a7c49797 AM |
10452 | } |
10453 | if (PPC_LO (r2off) != 0) | |
10454 | { | |
10455 | bfd_put_32 (htab->params->stub_bfd, | |
9e390558 AM |
10456 | ADDI_R2_R2 | PPC_LO (r2off), p); |
10457 | p += 4; | |
ac2df442 | 10458 | } |
9e390558 | 10459 | off -= p - loc; |
ad8e1ba5 | 10460 | } |
9e390558 AM |
10461 | bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), p); |
10462 | p += 4; | |
ad8e1ba5 | 10463 | |
5c3dead3 AM |
10464 | if (off + (1 << 25) >= (bfd_vma) (1 << 26)) |
10465 | { | |
cf97bcb0 AM |
10466 | _bfd_error_handler |
10467 | (_("long branch stub `%s' offset overflow"), | |
bc30df16 | 10468 | stub_entry->root.string); |
5c3dead3 AM |
10469 | htab->stub_error = TRUE; |
10470 | return FALSE; | |
10471 | } | |
ee75fd95 AM |
10472 | |
10473 | if (info->emitrelocations) | |
10474 | { | |
6f20ed8a | 10475 | r = get_relocs (stub_entry->group->stub_sec, 1); |
176a0d42 AM |
10476 | if (r == NULL) |
10477 | return FALSE; | |
9e390558 | 10478 | r->r_offset = p - 4 - stub_entry->group->stub_sec->contents; |
ee75fd95 | 10479 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL24); |
1aa42141 | 10480 | r->r_addend = targ; |
3d58e1fc AM |
10481 | if (stub_entry->h != NULL |
10482 | && !use_global_in_relocs (htab, stub_entry, r, 1)) | |
10483 | return FALSE; | |
ee75fd95 | 10484 | } |
721956f4 | 10485 | break; |
e86ce104 | 10486 | |
721956f4 | 10487 | case ppc_stub_plt_branch: |
ad8e1ba5 | 10488 | case ppc_stub_plt_branch_r2off: |
721956f4 AM |
10489 | br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, |
10490 | stub_entry->root.string + 9, | |
b34976b6 | 10491 | FALSE, FALSE); |
721956f4 AM |
10492 | if (br_entry == NULL) |
10493 | { | |
cf97bcb0 AM |
10494 | _bfd_error_handler (_("can't find branch stub `%s'"), |
10495 | stub_entry->root.string); | |
b34976b6 AM |
10496 | htab->stub_error = TRUE; |
10497 | return FALSE; | |
721956f4 AM |
10498 | } |
10499 | ||
1aa42141 | 10500 | targ = (stub_entry->target_value |
176a0d42 AM |
10501 | + stub_entry->target_section->output_offset |
10502 | + stub_entry->target_section->output_section->vma); | |
6911b7dc | 10503 | if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) |
1aa42141 | 10504 | targ += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other); |
721956f4 | 10505 | |
1aa42141 | 10506 | bfd_put_64 (htab->brlt->owner, targ, |
4ce794b7 | 10507 | htab->brlt->contents + br_entry->offset); |
721956f4 | 10508 | |
f94498ff | 10509 | if (br_entry->iter == htab->stub_iteration) |
721956f4 | 10510 | { |
f94498ff | 10511 | br_entry->iter = 0; |
84f5d08e | 10512 | |
f94498ff | 10513 | if (htab->relbrlt != NULL) |
84f5d08e | 10514 | { |
f94498ff AM |
10515 | /* Create a reloc for the branch lookup table entry. */ |
10516 | Elf_Internal_Rela rela; | |
10517 | bfd_byte *rl; | |
10518 | ||
10519 | rela.r_offset = (br_entry->offset | |
10520 | + htab->brlt->output_offset | |
10521 | + htab->brlt->output_section->vma); | |
10522 | rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); | |
1aa42141 | 10523 | rela.r_addend = targ; |
f94498ff AM |
10524 | |
10525 | rl = htab->relbrlt->contents; | |
10526 | rl += (htab->relbrlt->reloc_count++ | |
10527 | * sizeof (Elf64_External_Rela)); | |
10528 | bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl); | |
10529 | } | |
10530 | else if (info->emitrelocations) | |
10531 | { | |
176a0d42 AM |
10532 | r = get_relocs (htab->brlt, 1); |
10533 | if (r == NULL) | |
10534 | return FALSE; | |
10535 | /* brlt, being SEC_LINKER_CREATED does not go through the | |
10536 | normal reloc processing. Symbols and offsets are not | |
10537 | translated from input file to output file form, so | |
10538 | set up the offset per the output file. */ | |
f94498ff AM |
10539 | r->r_offset = (br_entry->offset |
10540 | + htab->brlt->output_offset | |
10541 | + htab->brlt->output_section->vma); | |
10542 | r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); | |
1aa42141 | 10543 | r->r_addend = targ; |
84f5d08e | 10544 | } |
84f5d08e | 10545 | } |
721956f4 | 10546 | |
1aa42141 | 10547 | targ = (br_entry->offset |
176a0d42 AM |
10548 | + htab->brlt->output_offset |
10549 | + htab->brlt->output_section->vma); | |
10550 | ||
1aa42141 AM |
10551 | off = (elf_gp (info->output_bfd) |
10552 | + htab->sec_info[stub_entry->group->link_sec->id].toc_off); | |
10553 | off = targ - off; | |
721956f4 | 10554 | |
ad8e1ba5 | 10555 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
5d1634d7 | 10556 | { |
25f53a85 | 10557 | info->callbacks->einfo |
c1c8c1ef | 10558 | (_("%P: linkage table error against `%pT'\n"), |
721956f4 | 10559 | stub_entry->root.string); |
5d1634d7 | 10560 | bfd_set_error (bfd_error_bad_value); |
b34976b6 AM |
10561 | htab->stub_error = TRUE; |
10562 | return FALSE; | |
5d1634d7 | 10563 | } |
41bd81ab | 10564 | |
176a0d42 AM |
10565 | if (info->emitrelocations) |
10566 | { | |
6f20ed8a | 10567 | r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0)); |
176a0d42 AM |
10568 | if (r == NULL) |
10569 | return FALSE; | |
6f20ed8a | 10570 | r[0].r_offset = loc - stub_entry->group->stub_sec->contents; |
7cfbafbc AM |
10571 | if (bfd_big_endian (info->output_bfd)) |
10572 | r[0].r_offset += 2; | |
00f412ee | 10573 | if (stub_entry->stub_type == ppc_stub_plt_branch_r2off) |
176a0d42 AM |
10574 | r[0].r_offset += 4; |
10575 | r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); | |
1aa42141 | 10576 | r[0].r_addend = targ; |
176a0d42 AM |
10577 | if (PPC_HA (off) != 0) |
10578 | { | |
10579 | r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA); | |
10580 | r[1].r_offset = r[0].r_offset + 4; | |
10581 | r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); | |
10582 | r[1].r_addend = r[0].r_addend; | |
10583 | } | |
10584 | } | |
10585 | ||
9e390558 | 10586 | p = loc; |
00f412ee | 10587 | if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) |
ad8e1ba5 | 10588 | { |
176a0d42 | 10589 | if (PPC_HA (off) != 0) |
ac2df442 | 10590 | { |
e7d1c40c | 10591 | bfd_put_32 (htab->params->stub_bfd, |
9e390558 AM |
10592 | ADDIS_R12_R2 | PPC_HA (off), p); |
10593 | p += 4; | |
e7d1c40c | 10594 | bfd_put_32 (htab->params->stub_bfd, |
9e390558 | 10595 | LD_R12_0R12 | PPC_LO (off), p); |
ac2df442 AM |
10596 | } |
10597 | else | |
9e390558 AM |
10598 | bfd_put_32 (htab->params->stub_bfd, |
10599 | LD_R12_0R2 | PPC_LO (off), p); | |
ad8e1ba5 AM |
10600 | } |
10601 | else | |
10602 | { | |
25f53a85 | 10603 | bfd_vma r2off = get_r2off (info, stub_entry); |
aa374f67 | 10604 | |
a7c49797 | 10605 | if (r2off == (bfd_vma) -1) |
aa374f67 AM |
10606 | { |
10607 | htab->stub_error = TRUE; | |
10608 | return FALSE; | |
10609 | } | |
ad8e1ba5 | 10610 | |
9e390558 AM |
10611 | bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p); |
10612 | p += 4; | |
176a0d42 | 10613 | if (PPC_HA (off) != 0) |
ac2df442 | 10614 | { |
e7d1c40c | 10615 | bfd_put_32 (htab->params->stub_bfd, |
9e390558 AM |
10616 | ADDIS_R12_R2 | PPC_HA (off), p); |
10617 | p += 4; | |
e7d1c40c | 10618 | bfd_put_32 (htab->params->stub_bfd, |
9e390558 | 10619 | LD_R12_0R12 | PPC_LO (off), p); |
ac2df442 AM |
10620 | } |
10621 | else | |
9e390558 | 10622 | bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), p); |
ac2df442 AM |
10623 | |
10624 | if (PPC_HA (r2off) != 0) | |
10625 | { | |
9e390558 | 10626 | p += 4; |
e7d1c40c | 10627 | bfd_put_32 (htab->params->stub_bfd, |
9e390558 | 10628 | ADDIS_R2_R2 | PPC_HA (r2off), p); |
00f412ee AM |
10629 | } |
10630 | if (PPC_LO (r2off) != 0) | |
10631 | { | |
9e390558 | 10632 | p += 4; |
e7d1c40c | 10633 | bfd_put_32 (htab->params->stub_bfd, |
9e390558 | 10634 | ADDI_R2_R2 | PPC_LO (r2off), p); |
ac2df442 | 10635 | } |
ad8e1ba5 | 10636 | } |
9e390558 AM |
10637 | p += 4; |
10638 | bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, p); | |
10639 | p += 4; | |
407aa07c AM |
10640 | bfd_put_32 (htab->params->stub_bfd, BCTR, p); |
10641 | p += 4; | |
721956f4 | 10642 | break; |
5d1634d7 | 10643 | |
05d0e962 AM |
10644 | case ppc_stub_long_branch_notoc: |
10645 | case ppc_stub_long_branch_both: | |
10646 | case ppc_stub_plt_branch_notoc: | |
10647 | case ppc_stub_plt_branch_both: | |
10648 | case ppc_stub_plt_call_notoc: | |
10649 | case ppc_stub_plt_call_both: | |
10650 | p = loc; | |
f891966f | 10651 | off = (stub_entry->stub_offset |
05d0e962 AM |
10652 | + stub_entry->group->stub_sec->output_offset |
10653 | + stub_entry->group->stub_sec->output_section->vma); | |
10654 | if (stub_entry->stub_type == ppc_stub_long_branch_both | |
10655 | || stub_entry->stub_type == ppc_stub_plt_branch_both | |
10656 | || stub_entry->stub_type == ppc_stub_plt_call_both) | |
10657 | { | |
10658 | off += 4; | |
10659 | bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p); | |
10660 | p += 4; | |
10661 | } | |
10662 | if (stub_entry->stub_type >= ppc_stub_plt_call_notoc) | |
10663 | { | |
10664 | targ = stub_entry->plt_ent->plt.offset & ~1; | |
10665 | if (targ >= (bfd_vma) -2) | |
10666 | abort (); | |
10667 | ||
10668 | plt = htab->elf.splt; | |
10669 | if (!htab->elf.dynamic_sections_created | |
10670 | || stub_entry->h == NULL | |
10671 | || stub_entry->h->elf.dynindx == -1) | |
10672 | { | |
10673 | if (stub_entry->symtype == STT_GNU_IFUNC) | |
10674 | plt = htab->elf.iplt; | |
10675 | else | |
10676 | plt = htab->pltlocal; | |
10677 | } | |
10678 | targ += plt->output_offset + plt->output_section->vma; | |
10679 | } | |
10680 | else | |
10681 | targ = (stub_entry->target_value | |
10682 | + stub_entry->target_section->output_offset | |
10683 | + stub_entry->target_section->output_section->vma); | |
10684 | off = targ - off; | |
f891966f | 10685 | |
3d58e1fc AM |
10686 | relp = p; |
10687 | num_rel = 0; | |
f891966f AM |
10688 | /* The notoc stubs calculate their target (either a PLT entry or |
10689 | the global entry point of a function) relative to the PC | |
10690 | returned by the "bcl" two instructions past the start of the | |
10691 | sequence emitted by build_offset. The offset is therefore 8 | |
10692 | less than calculated from the start of the sequence. */ | |
10693 | off -= 8; | |
05d0e962 AM |
10694 | p = build_offset (htab->params->stub_bfd, p, off, |
10695 | stub_entry->stub_type >= ppc_stub_plt_call_notoc); | |
f891966f | 10696 | if (stub_entry->stub_type <= ppc_stub_long_branch_both) |
05d0e962 | 10697 | { |
f891966f | 10698 | bfd_vma from; |
3d58e1fc | 10699 | num_rel = 1; |
f891966f AM |
10700 | from = (stub_entry->stub_offset |
10701 | + stub_entry->group->stub_sec->output_offset | |
10702 | + stub_entry->group->stub_sec->output_section->vma | |
10703 | + (p - loc)); | |
05d0e962 | 10704 | bfd_put_32 (htab->params->stub_bfd, |
f891966f | 10705 | B_DOT | ((targ - from) & 0x3fffffc), p); |
05d0e962 AM |
10706 | } |
10707 | else | |
10708 | { | |
10709 | bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, p); | |
10710 | p += 4; | |
10711 | bfd_put_32 (htab->params->stub_bfd, BCTR, p); | |
10712 | } | |
10713 | p += 4; | |
df136d64 | 10714 | |
3d58e1fc AM |
10715 | if (info->emitrelocations) |
10716 | { | |
10717 | bfd_vma roff; | |
10718 | num_rel += num_relocs_for_offset (off); | |
10719 | r = get_relocs (stub_entry->group->stub_sec, num_rel); | |
10720 | if (r == NULL) | |
10721 | return FALSE; | |
10722 | roff = relp + 16 - stub_entry->group->stub_sec->contents; | |
10723 | r = emit_relocs_for_offset (info, r, roff, targ, off); | |
10724 | if (stub_entry->stub_type == ppc_stub_long_branch_notoc | |
10725 | || stub_entry->stub_type == ppc_stub_long_branch_both) | |
10726 | { | |
10727 | ++r; | |
10728 | roff = p - 4 - stub_entry->group->stub_sec->contents; | |
10729 | r->r_offset = roff; | |
10730 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL24); | |
10731 | r->r_addend = targ; | |
10732 | if (stub_entry->h != NULL | |
10733 | && !use_global_in_relocs (htab, stub_entry, r, num_rel)) | |
10734 | return FALSE; | |
10735 | } | |
10736 | } | |
10737 | ||
df136d64 AM |
10738 | if (htab->glink_eh_frame != NULL |
10739 | && htab->glink_eh_frame->size != 0) | |
10740 | { | |
10741 | bfd_byte *base, *eh; | |
10742 | unsigned int lr_used, delta; | |
10743 | ||
10744 | base = (htab->glink_eh_frame->contents | |
10745 | + stub_entry->group->eh_base + 17); | |
10746 | eh = base + stub_entry->group->eh_size; | |
10747 | lr_used = stub_entry->stub_offset + 8; | |
10748 | if (stub_entry->stub_type == ppc_stub_long_branch_both | |
10749 | || stub_entry->stub_type == ppc_stub_plt_branch_both | |
10750 | || stub_entry->stub_type == ppc_stub_plt_call_both) | |
10751 | lr_used += 4; | |
10752 | delta = lr_used - stub_entry->group->lr_restore; | |
10753 | stub_entry->group->lr_restore = lr_used + 8; | |
10754 | eh = eh_advance (htab->elf.dynobj, eh, delta); | |
10755 | *eh++ = DW_CFA_register; | |
10756 | *eh++ = 65; | |
10757 | *eh++ = 12; | |
10758 | *eh++ = DW_CFA_advance_loc + 2; | |
10759 | *eh++ = DW_CFA_restore_extended; | |
10760 | *eh++ = 65; | |
10761 | stub_entry->group->eh_size = eh - base; | |
10762 | } | |
05d0e962 AM |
10763 | break; |
10764 | ||
721956f4 | 10765 | case ppc_stub_plt_call: |
794e51c0 | 10766 | case ppc_stub_plt_call_r2save: |
e054468f | 10767 | if (stub_entry->h != NULL |
b31867b6 AM |
10768 | && stub_entry->h->is_func_descriptor |
10769 | && stub_entry->h->oh != NULL) | |
c862ae31 | 10770 | { |
b31867b6 AM |
10771 | struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh); |
10772 | ||
10773 | /* If the old-ABI "dot-symbol" is undefined make it weak so | |
6f20ed8a | 10774 | we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */ |
8c5b4e52 AM |
10775 | if (fh->elf.root.type == bfd_link_hash_undefined |
10776 | && (stub_entry->h->elf.root.type == bfd_link_hash_defined | |
10777 | || stub_entry->h->elf.root.type == bfd_link_hash_defweak)) | |
b31867b6 | 10778 | fh->elf.root.type = bfd_link_hash_undefweak; |
c862ae31 AM |
10779 | } |
10780 | ||
721956f4 | 10781 | /* Now build the stub. */ |
1aa42141 AM |
10782 | targ = stub_entry->plt_ent->plt.offset & ~1; |
10783 | if (targ >= (bfd_vma) -2) | |
721956f4 AM |
10784 | abort (); |
10785 | ||
33e44f2e | 10786 | plt = htab->elf.splt; |
25f23106 AM |
10787 | if (!htab->elf.dynamic_sections_created |
10788 | || stub_entry->h == NULL | |
10789 | || stub_entry->h->elf.dynindx == -1) | |
2d7ad24e AM |
10790 | { |
10791 | if (stub_entry->symtype == STT_GNU_IFUNC) | |
10792 | plt = htab->elf.iplt; | |
10793 | else | |
10794 | plt = htab->pltlocal; | |
10795 | } | |
1aa42141 | 10796 | targ += plt->output_offset + plt->output_section->vma; |
e054468f | 10797 | |
1aa42141 AM |
10798 | off = (elf_gp (info->output_bfd) |
10799 | + htab->sec_info[stub_entry->group->link_sec->id].toc_off); | |
10800 | off = targ - off; | |
721956f4 | 10801 | |
ad8e1ba5 | 10802 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
721956f4 | 10803 | { |
25f53a85 | 10804 | info->callbacks->einfo |
695344c0 | 10805 | /* xgettext:c-format */ |
c1c8c1ef | 10806 | (_("%P: linkage table error against `%pT'\n"), |
e054468f AM |
10807 | stub_entry->h != NULL |
10808 | ? stub_entry->h->elf.root.root.string | |
10809 | : "<local sym>"); | |
721956f4 | 10810 | bfd_set_error (bfd_error_bad_value); |
b34976b6 AM |
10811 | htab->stub_error = TRUE; |
10812 | return FALSE; | |
721956f4 AM |
10813 | } |
10814 | ||
176a0d42 AM |
10815 | r = NULL; |
10816 | if (info->emitrelocations) | |
10817 | { | |
6f20ed8a | 10818 | r = get_relocs (stub_entry->group->stub_sec, |
3ba720c7 AM |
10819 | ((PPC_HA (off) != 0) |
10820 | + (htab->opd_abi | |
e7d1c40c | 10821 | ? 2 + (htab->params->plt_static_chain |
3ba720c7 AM |
10822 | && PPC_HA (off + 16) == PPC_HA (off)) |
10823 | : 1))); | |
176a0d42 AM |
10824 | if (r == NULL) |
10825 | return FALSE; | |
6f20ed8a | 10826 | r[0].r_offset = loc - stub_entry->group->stub_sec->contents; |
7cfbafbc AM |
10827 | if (bfd_big_endian (info->output_bfd)) |
10828 | r[0].r_offset += 2; | |
1aa42141 | 10829 | r[0].r_addend = targ; |
176a0d42 | 10830 | } |
a7f2871e AM |
10831 | if (stub_entry->h != NULL |
10832 | && (stub_entry->h == htab->tls_get_addr_fd | |
10833 | || stub_entry->h == htab->tls_get_addr) | |
7c9cf415 | 10834 | && htab->params->tls_get_addr_opt) |
794e51c0 | 10835 | p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r); |
a7f2871e | 10836 | else |
794e51c0 | 10837 | p = build_plt_stub (htab, stub_entry, loc, off, r); |
721956f4 AM |
10838 | break; |
10839 | ||
a4b6fadd AM |
10840 | case ppc_stub_save_res: |
10841 | return TRUE; | |
10842 | ||
721956f4 AM |
10843 | default: |
10844 | BFD_FAIL (); | |
b34976b6 | 10845 | return FALSE; |
721956f4 AM |
10846 | } |
10847 | ||
1aa42141 | 10848 | stub_entry->group->stub_sec->size = stub_entry->stub_offset + (p - loc); |
97b639ba | 10849 | |
e7d1c40c | 10850 | if (htab->params->emit_stub_syms) |
97b639ba AM |
10851 | { |
10852 | struct elf_link_hash_entry *h; | |
ee75fd95 AM |
10853 | size_t len1, len2; |
10854 | char *name; | |
10855 | const char *const stub_str[] = { "long_branch", | |
05d0e962 AM |
10856 | "long_branch", |
10857 | "long_branch", | |
3f6ff479 AM |
10858 | "long_branch", |
10859 | "plt_branch", | |
ee75fd95 | 10860 | "plt_branch", |
05d0e962 AM |
10861 | "plt_branch", |
10862 | "plt_branch", | |
10863 | "plt_call", | |
10864 | "plt_call", | |
794e51c0 | 10865 | "plt_call", |
ee75fd95 AM |
10866 | "plt_call" }; |
10867 | ||
10868 | len1 = strlen (stub_str[stub_entry->stub_type - 1]); | |
10869 | len2 = strlen (stub_entry->root.string); | |
10870 | name = bfd_malloc (len1 + len2 + 2); | |
10871 | if (name == NULL) | |
10872 | return FALSE; | |
10873 | memcpy (name, stub_entry->root.string, 9); | |
10874 | memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1); | |
10875 | memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1); | |
10876 | h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); | |
97b639ba AM |
10877 | if (h == NULL) |
10878 | return FALSE; | |
10879 | if (h->root.type == bfd_link_hash_new) | |
10880 | { | |
10881 | h->root.type = bfd_link_hash_defined; | |
6f20ed8a | 10882 | h->root.u.def.section = stub_entry->group->stub_sec; |
97b639ba | 10883 | h->root.u.def.value = stub_entry->stub_offset; |
f5385ebf AM |
10884 | h->ref_regular = 1; |
10885 | h->def_regular = 1; | |
10886 | h->ref_regular_nonweak = 1; | |
10887 | h->forced_local = 1; | |
10888 | h->non_elf = 0; | |
2ec55de3 | 10889 | h->root.linker_def = 1; |
97b639ba AM |
10890 | } |
10891 | } | |
10892 | ||
b34976b6 | 10893 | return TRUE; |
721956f4 AM |
10894 | } |
10895 | ||
10896 | /* As above, but don't actually build the stub. Just bump offset so | |
10897 | we know stub section sizes, and select plt_branch stubs where | |
10898 | long_branch stubs won't do. */ | |
10899 | ||
b34976b6 | 10900 | static bfd_boolean |
4ce794b7 | 10901 | ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
721956f4 AM |
10902 | { |
10903 | struct ppc_stub_hash_entry *stub_entry; | |
63bc6f6c | 10904 | struct bfd_link_info *info; |
721956f4 | 10905 | struct ppc_link_hash_table *htab; |
f891966f AM |
10906 | asection *plt; |
10907 | bfd_vma targ, off, r2off; | |
10908 | unsigned int size, extra, lr_used, delta; | |
721956f4 AM |
10909 | |
10910 | /* Massage our args to the form they really have. */ | |
10911 | stub_entry = (struct ppc_stub_hash_entry *) gen_entry; | |
63bc6f6c AM |
10912 | info = in_arg; |
10913 | ||
10914 | htab = ppc_hash_table (info); | |
4dfe6ac6 NC |
10915 | if (htab == NULL) |
10916 | return FALSE; | |
721956f4 | 10917 | |
1aa42141 AM |
10918 | /* Make a note of the offset within the stubs for this entry. */ |
10919 | stub_entry->stub_offset = stub_entry->group->stub_sec->size; | |
10920 | ||
a4b6fadd AM |
10921 | if (stub_entry->h != NULL |
10922 | && stub_entry->h->save_res | |
10923 | && stub_entry->h->elf.root.type == bfd_link_hash_defined | |
10924 | && stub_entry->h->elf.root.u.def.section == htab->sfpr) | |
10925 | { | |
10926 | /* Don't make stubs to out-of-line register save/restore | |
10927 | functions. Instead, emit copies of the functions. */ | |
10928 | stub_entry->group->needs_save_res = 1; | |
10929 | stub_entry->stub_type = ppc_stub_save_res; | |
10930 | return TRUE; | |
10931 | } | |
10932 | ||
f891966f | 10933 | switch (stub_entry->stub_type) |
721956f4 | 10934 | { |
f891966f AM |
10935 | case ppc_stub_plt_branch: |
10936 | case ppc_stub_plt_branch_r2off: | |
10937 | /* Reset the stub type from the plt branch variant in case we now | |
10938 | can reach with a shorter stub. */ | |
10939 | stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch; | |
10940 | /* Fall through. */ | |
10941 | case ppc_stub_long_branch: | |
10942 | case ppc_stub_long_branch_r2off: | |
1aa42141 AM |
10943 | targ = (stub_entry->target_value |
10944 | + stub_entry->target_section->output_offset | |
10945 | + stub_entry->target_section->output_section->vma); | |
f891966f | 10946 | targ += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other); |
1aa42141 AM |
10947 | off = (stub_entry->stub_offset |
10948 | + stub_entry->group->stub_sec->output_offset | |
10949 | + stub_entry->group->stub_sec->output_section->vma); | |
721956f4 | 10950 | |
ad8e1ba5 | 10951 | size = 4; |
f891966f | 10952 | r2off = 0; |
ad8e1ba5 AM |
10953 | if (stub_entry->stub_type == ppc_stub_long_branch_r2off) |
10954 | { | |
25f53a85 | 10955 | r2off = get_r2off (info, stub_entry); |
a7c49797 | 10956 | if (r2off == (bfd_vma) -1) |
aa374f67 AM |
10957 | { |
10958 | htab->stub_error = TRUE; | |
10959 | return FALSE; | |
10960 | } | |
a7c49797 | 10961 | size = 8; |
ac2df442 | 10962 | if (PPC_HA (r2off) != 0) |
a7c49797 AM |
10963 | size += 4; |
10964 | if (PPC_LO (r2off) != 0) | |
10965 | size += 4; | |
1aa42141 | 10966 | off += size - 4; |
ad8e1ba5 | 10967 | } |
1aa42141 | 10968 | off = targ - off; |
ad8e1ba5 | 10969 | |
f891966f AM |
10970 | /* If the branch offset is too big, use a ppc_stub_plt_branch. |
10971 | Do the same for -R objects without function descriptors. */ | |
10972 | if ((stub_entry->stub_type == ppc_stub_long_branch_r2off | |
10973 | && r2off == 0 | |
10974 | && htab->sec_info[stub_entry->target_section->id].toc_off == 0) | |
10975 | || off + (1 << 25) >= (bfd_vma) (1 << 26)) | |
721956f4 | 10976 | { |
f891966f | 10977 | struct ppc_branch_hash_entry *br_entry; |
df136d64 | 10978 | |
f891966f AM |
10979 | br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, |
10980 | stub_entry->root.string + 9, | |
10981 | TRUE, FALSE); | |
10982 | if (br_entry == NULL) | |
721956f4 | 10983 | { |
f891966f AM |
10984 | _bfd_error_handler (_("can't build branch stub `%s'"), |
10985 | stub_entry->root.string); | |
10986 | htab->stub_error = TRUE; | |
10987 | return FALSE; | |
721956f4 AM |
10988 | } |
10989 | ||
f891966f | 10990 | if (br_entry->iter != htab->stub_iteration) |
721956f4 | 10991 | { |
f891966f AM |
10992 | br_entry->iter = htab->stub_iteration; |
10993 | br_entry->offset = htab->brlt->size; | |
10994 | htab->brlt->size += 8; | |
63bc6f6c | 10995 | |
f891966f AM |
10996 | if (htab->relbrlt != NULL) |
10997 | htab->relbrlt->size += sizeof (Elf64_External_Rela); | |
10998 | else if (info->emitrelocations) | |
84f5d08e | 10999 | { |
f891966f AM |
11000 | htab->brlt->reloc_count += 1; |
11001 | htab->brlt->flags |= SEC_RELOC; | |
05d0e962 | 11002 | } |
f891966f | 11003 | } |
ac2df442 | 11004 | |
f891966f AM |
11005 | targ = (br_entry->offset |
11006 | + htab->brlt->output_offset | |
11007 | + htab->brlt->output_section->vma); | |
11008 | off = (elf_gp (info->output_bfd) | |
11009 | + htab->sec_info[stub_entry->group->link_sec->id].toc_off); | |
11010 | off = targ - off; | |
176a0d42 | 11011 | |
f891966f AM |
11012 | if (info->emitrelocations) |
11013 | { | |
11014 | stub_entry->group->stub_sec->reloc_count | |
11015 | += 1 + (PPC_HA (off) != 0); | |
11016 | stub_entry->group->stub_sec->flags |= SEC_RELOC; | |
11017 | } | |
05d0e962 | 11018 | |
f891966f AM |
11019 | stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch; |
11020 | if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) | |
11021 | { | |
11022 | size = 12; | |
11023 | if (PPC_HA (off) != 0) | |
11024 | size = 16; | |
ac2df442 | 11025 | } |
f891966f | 11026 | else |
ac2df442 | 11027 | { |
f891966f AM |
11028 | size = 16; |
11029 | if (PPC_HA (off) != 0) | |
11030 | size += 4; | |
11031 | ||
11032 | if (PPC_HA (r2off) != 0) | |
11033 | size += 4; | |
11034 | if (PPC_LO (r2off) != 0) | |
11035 | size += 4; | |
ac2df442 | 11036 | } |
721956f4 | 11037 | } |
f891966f AM |
11038 | else if (info->emitrelocations) |
11039 | { | |
11040 | stub_entry->group->stub_sec->reloc_count += 1; | |
11041 | stub_entry->group->stub_sec->flags |= SEC_RELOC; | |
11042 | } | |
11043 | break; | |
11044 | ||
11045 | case ppc_stub_plt_branch_notoc: | |
11046 | case ppc_stub_plt_branch_both: | |
11047 | stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch; | |
11048 | /* Fall through. */ | |
11049 | case ppc_stub_long_branch_notoc: | |
11050 | case ppc_stub_long_branch_both: | |
11051 | off = (stub_entry->stub_offset | |
11052 | + stub_entry->group->stub_sec->output_offset | |
11053 | + stub_entry->group->stub_sec->output_section->vma); | |
11054 | size = 0; | |
11055 | if (stub_entry->stub_type == ppc_stub_long_branch_both) | |
11056 | size = 4; | |
11057 | off += size; | |
11058 | targ = (stub_entry->target_value | |
11059 | + stub_entry->target_section->output_offset | |
11060 | + stub_entry->target_section->output_section->vma); | |
11061 | off = targ - off; | |
11062 | ||
3d58e1fc AM |
11063 | if (info->emitrelocations) |
11064 | { | |
11065 | stub_entry->group->stub_sec->reloc_count | |
11066 | += num_relocs_for_offset (off); | |
11067 | stub_entry->group->stub_sec->flags |= SEC_RELOC; | |
11068 | } | |
11069 | ||
f891966f AM |
11070 | extra = size_offset (off - 8); |
11071 | /* Include branch insn plus those in the offset sequence. */ | |
11072 | size += 4 + extra; | |
11073 | /* The branch insn is at the end, or "extra" bytes along. So | |
11074 | its offset will be "extra" bytes less that that already | |
11075 | calculated. */ | |
11076 | off -= extra; | |
11077 | ||
11078 | /* After the bcl, lr has been modified so we need to emit | |
11079 | .eh_frame info saying the return address is in r12. */ | |
11080 | lr_used = stub_entry->stub_offset + 8; | |
11081 | if (stub_entry->stub_type == ppc_stub_long_branch_both) | |
11082 | lr_used += 4; | |
11083 | /* The eh_frame info will consist of a DW_CFA_advance_loc or | |
11084 | variant, DW_CFA_register, 65, 12, DW_CFA_advance_loc+2, | |
11085 | DW_CFA_restore_extended 65. */ | |
11086 | delta = lr_used - stub_entry->group->lr_restore; | |
11087 | stub_entry->group->eh_size += eh_advance_size (delta) + 6; | |
11088 | stub_entry->group->lr_restore = lr_used + 8; | |
11089 | ||
11090 | /* If the branch can't reach, use a plt_branch. */ | |
11091 | if (off + (1 << 25) >= (bfd_vma) (1 << 26)) | |
11092 | { | |
11093 | stub_entry->stub_type += (ppc_stub_plt_branch_notoc | |
11094 | - ppc_stub_long_branch_notoc); | |
11095 | size += 4; | |
11096 | } | |
3d58e1fc AM |
11097 | else if (info->emitrelocations) |
11098 | stub_entry->group->stub_sec->reloc_count +=1; | |
f891966f AM |
11099 | break; |
11100 | ||
11101 | case ppc_stub_plt_call_notoc: | |
11102 | case ppc_stub_plt_call_both: | |
11103 | off = (stub_entry->stub_offset | |
11104 | + stub_entry->group->stub_sec->output_offset | |
11105 | + stub_entry->group->stub_sec->output_section->vma); | |
11106 | if (stub_entry->stub_type == ppc_stub_plt_call_both) | |
11107 | off += 4; | |
11108 | targ = stub_entry->plt_ent->plt.offset & ~1; | |
11109 | if (targ >= (bfd_vma) -2) | |
11110 | abort (); | |
11111 | ||
11112 | plt = htab->elf.splt; | |
11113 | if (!htab->elf.dynamic_sections_created | |
11114 | || stub_entry->h == NULL | |
11115 | || stub_entry->h->elf.dynindx == -1) | |
11116 | { | |
11117 | if (stub_entry->symtype == STT_GNU_IFUNC) | |
11118 | plt = htab->elf.iplt; | |
11119 | else | |
11120 | plt = htab->pltlocal; | |
11121 | } | |
11122 | targ += plt->output_offset + plt->output_section->vma; | |
11123 | off = targ - off; | |
11124 | ||
11125 | if (htab->params->plt_stub_align != 0) | |
11126 | { | |
11127 | unsigned pad = plt_stub_pad (htab, stub_entry, off); | |
11128 | ||
11129 | stub_entry->group->stub_sec->size += pad; | |
11130 | stub_entry->stub_offset = stub_entry->group->stub_sec->size; | |
11131 | off -= pad; | |
11132 | } | |
11133 | ||
3d58e1fc AM |
11134 | if (info->emitrelocations) |
11135 | { | |
11136 | stub_entry->group->stub_sec->reloc_count | |
11137 | += num_relocs_for_offset (off - 8); | |
11138 | stub_entry->group->stub_sec->flags |= SEC_RELOC; | |
11139 | } | |
11140 | ||
f891966f AM |
11141 | size = plt_stub_size (htab, stub_entry, off); |
11142 | ||
11143 | /* After the bcl, lr has been modified so we need to emit | |
11144 | .eh_frame info saying the return address is in r12. */ | |
11145 | lr_used = stub_entry->stub_offset + 8; | |
11146 | if (stub_entry->stub_type == ppc_stub_plt_call_both) | |
11147 | lr_used += 4; | |
11148 | /* The eh_frame info will consist of a DW_CFA_advance_loc or | |
11149 | variant, DW_CFA_register, 65, 12, DW_CFA_advance_loc+2, | |
11150 | DW_CFA_restore_extended 65. */ | |
11151 | delta = lr_used - stub_entry->group->lr_restore; | |
11152 | stub_entry->group->eh_size += eh_advance_size (delta) + 6; | |
11153 | stub_entry->group->lr_restore = lr_used + 8; | |
11154 | break; | |
11155 | ||
11156 | case ppc_stub_plt_call: | |
11157 | case ppc_stub_plt_call_r2save: | |
11158 | targ = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1; | |
11159 | if (targ >= (bfd_vma) -2) | |
11160 | abort (); | |
11161 | plt = htab->elf.splt; | |
11162 | if (!htab->elf.dynamic_sections_created | |
11163 | || stub_entry->h == NULL | |
11164 | || stub_entry->h->elf.dynindx == -1) | |
11165 | { | |
11166 | if (stub_entry->symtype == STT_GNU_IFUNC) | |
11167 | plt = htab->elf.iplt; | |
11168 | else | |
11169 | plt = htab->pltlocal; | |
11170 | } | |
11171 | targ += plt->output_offset + plt->output_section->vma; | |
11172 | ||
11173 | off = (elf_gp (info->output_bfd) | |
11174 | + htab->sec_info[stub_entry->group->link_sec->id].toc_off); | |
11175 | off = targ - off; | |
11176 | ||
11177 | if (htab->params->plt_stub_align != 0) | |
11178 | { | |
11179 | unsigned pad = plt_stub_pad (htab, stub_entry, off); | |
11180 | ||
11181 | stub_entry->group->stub_sec->size += pad; | |
11182 | stub_entry->stub_offset = stub_entry->group->stub_sec->size; | |
11183 | } | |
11184 | ||
11185 | if (info->emitrelocations) | |
11186 | { | |
11187 | stub_entry->group->stub_sec->reloc_count | |
11188 | += ((PPC_HA (off) != 0) | |
11189 | + (htab->opd_abi | |
11190 | ? 2 + (htab->params->plt_static_chain | |
11191 | && PPC_HA (off + 16) == PPC_HA (off)) | |
11192 | : 1)); | |
11193 | stub_entry->group->stub_sec->flags |= SEC_RELOC; | |
11194 | } | |
11195 | ||
11196 | size = plt_stub_size (htab, stub_entry, off); | |
11197 | ||
11198 | if (stub_entry->h != NULL | |
11199 | && (stub_entry->h == htab->tls_get_addr_fd | |
11200 | || stub_entry->h == htab->tls_get_addr) | |
11201 | && htab->params->tls_get_addr_opt | |
11202 | && stub_entry->stub_type == ppc_stub_plt_call_r2save) | |
11203 | { | |
11204 | /* After the bctrl, lr has been modified so we need to | |
11205 | emit .eh_frame info saying the return address is | |
11206 | on the stack. In fact we put the EH info specifying | |
11207 | that the return address is on the stack *at* the | |
11208 | call rather than after it, because the EH info for a | |
11209 | call needs to be specified by that point. | |
11210 | See libgcc/unwind-dw2.c execute_cfa_program. */ | |
11211 | lr_used = stub_entry->stub_offset + size - 20; | |
11212 | /* The eh_frame info will consist of a DW_CFA_advance_loc | |
11213 | or variant, DW_CFA_offset_externed_sf, 65, -stackoff, | |
11214 | DW_CFA_advance_loc+4, DW_CFA_restore_extended, 65. */ | |
11215 | delta = lr_used - stub_entry->group->lr_restore; | |
11216 | stub_entry->group->eh_size += eh_advance_size (delta) + 6; | |
11217 | stub_entry->group->lr_restore = size - 4; | |
11218 | } | |
11219 | break; | |
11220 | ||
11221 | default: | |
11222 | BFD_FAIL (); | |
11223 | return FALSE; | |
721956f4 AM |
11224 | } |
11225 | ||
6f20ed8a | 11226 | stub_entry->group->stub_sec->size += size; |
b34976b6 | 11227 | return TRUE; |
721956f4 AM |
11228 | } |
11229 | ||
11230 | /* Set up various things so that we can make a list of input sections | |
11231 | for each output section included in the link. Returns -1 on error, | |
cedb70c5 | 11232 | 0 when no stubs will be needed, and 1 on success. */ |
721956f4 AM |
11233 | |
11234 | int | |
e7d1c40c | 11235 | ppc64_elf_setup_section_lists (struct bfd_link_info *info) |
721956f4 | 11236 | { |
6f20ed8a | 11237 | unsigned int id; |
721956f4 AM |
11238 | bfd_size_type amt; |
11239 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
11240 | ||
4dfe6ac6 NC |
11241 | if (htab == NULL) |
11242 | return -1; | |
4c52953f | 11243 | |
7cf7fcc8 | 11244 | htab->sec_info_arr_size = _bfd_section_id; |
6f20ed8a AM |
11245 | amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size); |
11246 | htab->sec_info = bfd_zmalloc (amt); | |
11247 | if (htab->sec_info == NULL) | |
721956f4 AM |
11248 | return -1; |
11249 | ||
3d6f9012 AM |
11250 | /* Set toc_off for com, und, abs and ind sections. */ |
11251 | for (id = 0; id < 3; id++) | |
6f20ed8a | 11252 | htab->sec_info[id].toc_off = TOC_BASE_OFF; |
734b6cf9 | 11253 | |
721956f4 AM |
11254 | return 1; |
11255 | } | |
11256 | ||
927be08e AM |
11257 | /* Set up for first pass at multitoc partitioning. */ |
11258 | ||
11259 | void | |
11260 | ppc64_elf_start_multitoc_partition (struct bfd_link_info *info) | |
11261 | { | |
11262 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
11263 | ||
1c865ab2 | 11264 | htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd); |
927be08e AM |
11265 | htab->toc_bfd = NULL; |
11266 | htab->toc_first_sec = NULL; | |
11267 | } | |
11268 | ||
e717da7e AM |
11269 | /* The linker repeatedly calls this function for each TOC input section |
11270 | and linker generated GOT section. Group input bfds such that the toc | |
927be08e | 11271 | within a group is less than 64k in size. */ |
ad8e1ba5 | 11272 | |
927be08e | 11273 | bfd_boolean |
4ce794b7 | 11274 | ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec) |
ad8e1ba5 AM |
11275 | { |
11276 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
d77c8a4b | 11277 | bfd_vma addr, off, limit; |
ad8e1ba5 | 11278 | |
4dfe6ac6 NC |
11279 | if (htab == NULL) |
11280 | return FALSE; | |
11281 | ||
927be08e | 11282 | if (!htab->second_toc_pass) |
4c52953f | 11283 | { |
927be08e | 11284 | /* Keep track of the first .toc or .got section for this input bfd. */ |
a4fd3de5 AM |
11285 | bfd_boolean new_bfd = htab->toc_bfd != isec->owner; |
11286 | ||
11287 | if (new_bfd) | |
bf102f86 AM |
11288 | { |
11289 | htab->toc_bfd = isec->owner; | |
11290 | htab->toc_first_sec = isec; | |
11291 | } | |
927be08e | 11292 | |
bf102f86 AM |
11293 | addr = isec->output_offset + isec->output_section->vma; |
11294 | off = addr - htab->toc_curr; | |
d77c8a4b AM |
11295 | limit = 0x80008000; |
11296 | if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc) | |
11297 | limit = 0x10000; | |
11298 | if (off + isec->size > limit) | |
bf102f86 AM |
11299 | { |
11300 | addr = (htab->toc_first_sec->output_offset | |
11301 | + htab->toc_first_sec->output_section->vma); | |
11302 | htab->toc_curr = addr; | |
a27e685f | 11303 | htab->toc_curr &= -TOC_BASE_ALIGN; |
bf102f86 | 11304 | } |
99877b66 | 11305 | |
927be08e AM |
11306 | /* toc_curr is the base address of this toc group. Set elf_gp |
11307 | for the input section to be the offset relative to the | |
11308 | output toc base plus 0x8000. Making the input elf_gp an | |
11309 | offset allows us to move the toc as a whole without | |
11310 | recalculating input elf_gp. */ | |
06bcf541 | 11311 | off = htab->toc_curr - elf_gp (info->output_bfd); |
927be08e AM |
11312 | off += TOC_BASE_OFF; |
11313 | ||
11314 | /* Die if someone uses a linker script that doesn't keep input | |
11315 | file .toc and .got together. */ | |
a4fd3de5 AM |
11316 | if (new_bfd |
11317 | && elf_gp (isec->owner) != 0 | |
927be08e AM |
11318 | && elf_gp (isec->owner) != off) |
11319 | return FALSE; | |
11320 | ||
11321 | elf_gp (isec->owner) = off; | |
11322 | return TRUE; | |
4c52953f | 11323 | } |
927be08e AM |
11324 | |
11325 | /* During the second pass toc_first_sec points to the start of | |
11326 | a toc group, and toc_curr is used to track the old elf_gp. | |
11327 | We use toc_bfd to ensure we only look at each bfd once. */ | |
11328 | if (htab->toc_bfd == isec->owner) | |
11329 | return TRUE; | |
11330 | htab->toc_bfd = isec->owner; | |
11331 | ||
11332 | if (htab->toc_first_sec == NULL | |
11333 | || htab->toc_curr != elf_gp (isec->owner)) | |
11334 | { | |
11335 | htab->toc_curr = elf_gp (isec->owner); | |
11336 | htab->toc_first_sec = isec; | |
11337 | } | |
11338 | addr = (htab->toc_first_sec->output_offset | |
11339 | + htab->toc_first_sec->output_section->vma); | |
06bcf541 | 11340 | off = addr - elf_gp (info->output_bfd) + TOC_BASE_OFF; |
927be08e AM |
11341 | elf_gp (isec->owner) = off; |
11342 | ||
11343 | return TRUE; | |
ad8e1ba5 AM |
11344 | } |
11345 | ||
927be08e AM |
11346 | /* Called via elf_link_hash_traverse to merge GOT entries for global |
11347 | symbol H. */ | |
11348 | ||
11349 | static bfd_boolean | |
11350 | merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) | |
11351 | { | |
11352 | if (h->root.type == bfd_link_hash_indirect) | |
11353 | return TRUE; | |
11354 | ||
927be08e AM |
11355 | merge_got_entries (&h->got.glist); |
11356 | ||
11357 | return TRUE; | |
11358 | } | |
11359 | ||
11360 | /* Called via elf_link_hash_traverse to allocate GOT entries for global | |
11361 | symbol H. */ | |
11362 | ||
11363 | static bfd_boolean | |
11364 | reallocate_got (struct elf_link_hash_entry *h, void *inf) | |
11365 | { | |
11366 | struct got_entry *gent; | |
11367 | ||
11368 | if (h->root.type == bfd_link_hash_indirect) | |
11369 | return TRUE; | |
11370 | ||
927be08e AM |
11371 | for (gent = h->got.glist; gent != NULL; gent = gent->next) |
11372 | if (!gent->is_indirect) | |
11373 | allocate_got (h, (struct bfd_link_info *) inf, gent); | |
11374 | return TRUE; | |
11375 | } | |
11376 | ||
11377 | /* Called on the first multitoc pass after the last call to | |
11378 | ppc64_elf_next_toc_section. This function removes duplicate GOT | |
11379 | entries. */ | |
11380 | ||
11381 | bfd_boolean | |
11382 | ppc64_elf_layout_multitoc (struct bfd_link_info *info) | |
ad8e1ba5 AM |
11383 | { |
11384 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
927be08e AM |
11385 | struct bfd *ibfd, *ibfd2; |
11386 | bfd_boolean done_something; | |
11387 | ||
11388 | htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd); | |
ad8e1ba5 | 11389 | |
7865406b AM |
11390 | if (!htab->do_multi_toc) |
11391 | return FALSE; | |
11392 | ||
d0fae19d | 11393 | /* Merge global sym got entries within a toc group. */ |
927be08e AM |
11394 | elf_link_hash_traverse (&htab->elf, merge_global_got, info); |
11395 | ||
11396 | /* And tlsld_got. */ | |
c72f2fb2 | 11397 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
927be08e AM |
11398 | { |
11399 | struct got_entry *ent, *ent2; | |
11400 | ||
11401 | if (!is_ppc64_elf (ibfd)) | |
11402 | continue; | |
11403 | ||
11404 | ent = ppc64_tlsld_got (ibfd); | |
11405 | if (!ent->is_indirect | |
11406 | && ent->got.offset != (bfd_vma) -1) | |
11407 | { | |
c72f2fb2 | 11408 | for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next) |
927be08e AM |
11409 | { |
11410 | if (!is_ppc64_elf (ibfd2)) | |
11411 | continue; | |
11412 | ||
11413 | ent2 = ppc64_tlsld_got (ibfd2); | |
11414 | if (!ent2->is_indirect | |
11415 | && ent2->got.offset != (bfd_vma) -1 | |
11416 | && elf_gp (ibfd2) == elf_gp (ibfd)) | |
11417 | { | |
11418 | ent2->is_indirect = TRUE; | |
11419 | ent2->got.ent = ent; | |
11420 | } | |
11421 | } | |
11422 | } | |
11423 | } | |
11424 | ||
11425 | /* Zap sizes of got sections. */ | |
33e44f2e AM |
11426 | htab->elf.irelplt->rawsize = htab->elf.irelplt->size; |
11427 | htab->elf.irelplt->size -= htab->got_reli_size; | |
927be08e AM |
11428 | htab->got_reli_size = 0; |
11429 | ||
c72f2fb2 | 11430 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
927be08e AM |
11431 | { |
11432 | asection *got, *relgot; | |
11433 | ||
11434 | if (!is_ppc64_elf (ibfd)) | |
11435 | continue; | |
11436 | ||
11437 | got = ppc64_elf_tdata (ibfd)->got; | |
11438 | if (got != NULL) | |
11439 | { | |
11440 | got->rawsize = got->size; | |
11441 | got->size = 0; | |
11442 | relgot = ppc64_elf_tdata (ibfd)->relgot; | |
11443 | relgot->rawsize = relgot->size; | |
11444 | relgot->size = 0; | |
11445 | } | |
11446 | } | |
11447 | ||
11448 | /* Now reallocate the got, local syms first. We don't need to | |
11449 | allocate section contents again since we never increase size. */ | |
c72f2fb2 | 11450 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
927be08e AM |
11451 | { |
11452 | struct got_entry **lgot_ents; | |
11453 | struct got_entry **end_lgot_ents; | |
11454 | struct plt_entry **local_plt; | |
11455 | struct plt_entry **end_local_plt; | |
f961d9dd | 11456 | unsigned char *lgot_masks; |
927be08e AM |
11457 | bfd_size_type locsymcount; |
11458 | Elf_Internal_Shdr *symtab_hdr; | |
19e08130 | 11459 | asection *s; |
927be08e AM |
11460 | |
11461 | if (!is_ppc64_elf (ibfd)) | |
11462 | continue; | |
11463 | ||
11464 | lgot_ents = elf_local_got_ents (ibfd); | |
11465 | if (!lgot_ents) | |
11466 | continue; | |
11467 | ||
11468 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
11469 | locsymcount = symtab_hdr->sh_info; | |
11470 | end_lgot_ents = lgot_ents + locsymcount; | |
11471 | local_plt = (struct plt_entry **) end_lgot_ents; | |
11472 | end_local_plt = local_plt + locsymcount; | |
f961d9dd | 11473 | lgot_masks = (unsigned char *) end_local_plt; |
927be08e | 11474 | s = ppc64_elf_tdata (ibfd)->got; |
927be08e AM |
11475 | for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks) |
11476 | { | |
11477 | struct got_entry *ent; | |
11478 | ||
11479 | for (ent = *lgot_ents; ent != NULL; ent = ent->next) | |
d0fae19d | 11480 | { |
19e08130 AM |
11481 | unsigned int ent_size = 8; |
11482 | unsigned int rel_size = sizeof (Elf64_External_Rela); | |
11483 | ||
d0fae19d AM |
11484 | ent->got.offset = s->size; |
11485 | if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) | |
d0fae19d | 11486 | { |
19e08130 AM |
11487 | ent_size *= 2; |
11488 | rel_size *= 2; | |
11489 | } | |
11490 | s->size += ent_size; | |
37da22e5 | 11491 | if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC) |
19e08130 | 11492 | { |
33e44f2e | 11493 | htab->elf.irelplt->size += rel_size; |
19e08130 AM |
11494 | htab->got_reli_size += rel_size; |
11495 | } | |
6a3858a6 AM |
11496 | else if (bfd_link_pic (info) |
11497 | && !((ent->tls_type & TLS_TPREL) != 0 | |
11498 | && bfd_link_executable (info))) | |
19e08130 AM |
11499 | { |
11500 | asection *srel = ppc64_elf_tdata (ibfd)->relgot; | |
11501 | srel->size += rel_size; | |
d0fae19d AM |
11502 | } |
11503 | } | |
927be08e AM |
11504 | } |
11505 | } | |
11506 | ||
11507 | elf_link_hash_traverse (&htab->elf, reallocate_got, info); | |
11508 | ||
c72f2fb2 | 11509 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
927be08e AM |
11510 | { |
11511 | struct got_entry *ent; | |
11512 | ||
11513 | if (!is_ppc64_elf (ibfd)) | |
11514 | continue; | |
11515 | ||
11516 | ent = ppc64_tlsld_got (ibfd); | |
11517 | if (!ent->is_indirect | |
11518 | && ent->got.offset != (bfd_vma) -1) | |
11519 | { | |
11520 | asection *s = ppc64_elf_tdata (ibfd)->got; | |
11521 | ent->got.offset = s->size; | |
11522 | s->size += 16; | |
0e1862bb | 11523 | if (bfd_link_pic (info)) |
927be08e AM |
11524 | { |
11525 | asection *srel = ppc64_elf_tdata (ibfd)->relgot; | |
11526 | srel->size += sizeof (Elf64_External_Rela); | |
11527 | } | |
11528 | } | |
11529 | } | |
11530 | ||
33e44f2e | 11531 | done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size; |
927be08e | 11532 | if (!done_something) |
c72f2fb2 | 11533 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
927be08e AM |
11534 | { |
11535 | asection *got; | |
11536 | ||
11537 | if (!is_ppc64_elf (ibfd)) | |
11538 | continue; | |
11539 | ||
11540 | got = ppc64_elf_tdata (ibfd)->got; | |
11541 | if (got != NULL) | |
11542 | { | |
11543 | done_something = got->rawsize != got->size; | |
11544 | if (done_something) | |
11545 | break; | |
11546 | } | |
11547 | } | |
11548 | ||
11549 | if (done_something) | |
e7d1c40c | 11550 | (*htab->params->layout_sections_again) (); |
927be08e AM |
11551 | |
11552 | /* Set up for second pass over toc sections to recalculate elf_gp | |
11553 | on input sections. */ | |
11554 | htab->toc_bfd = NULL; | |
11555 | htab->toc_first_sec = NULL; | |
11556 | htab->second_toc_pass = TRUE; | |
11557 | return done_something; | |
11558 | } | |
11559 | ||
11560 | /* Called after second pass of multitoc partitioning. */ | |
11561 | ||
11562 | void | |
11563 | ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info) | |
11564 | { | |
11565 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
11566 | ||
11567 | /* After the second pass, toc_curr tracks the TOC offset used | |
11568 | for code sections below in ppc64_elf_next_input_section. */ | |
3d6f9012 | 11569 | htab->toc_curr = TOC_BASE_OFF; |
ad8e1ba5 AM |
11570 | } |
11571 | ||
9b5ecbd0 AM |
11572 | /* No toc references were found in ISEC. If the code in ISEC makes no |
11573 | calls, then there's no need to use toc adjusting stubs when branching | |
11574 | into ISEC. Actually, indirect calls from ISEC are OK as they will | |
4c52953f AM |
11575 | load r2. Returns -1 on error, 0 for no stub needed, 1 for stub |
11576 | needed, and 2 if a cyclical call-graph was found but no other reason | |
11577 | for a stub was detected. If called from the top level, a return of | |
11578 | 2 means the same as a return of 0. */ | |
9b5ecbd0 AM |
11579 | |
11580 | static int | |
4ce794b7 | 11581 | toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec) |
9b5ecbd0 | 11582 | { |
9b5ecbd0 | 11583 | int ret; |
70cc837d AM |
11584 | |
11585 | /* Mark this section as checked. */ | |
11586 | isec->call_check_done = 1; | |
9b5ecbd0 | 11587 | |
772119ce AM |
11588 | /* We know none of our code bearing sections will need toc stubs. */ |
11589 | if ((isec->flags & SEC_LINKER_CREATED) != 0) | |
11590 | return 0; | |
11591 | ||
eea6121a | 11592 | if (isec->size == 0) |
082c50f8 AM |
11593 | return 0; |
11594 | ||
4c52953f AM |
11595 | if (isec->output_section == NULL) |
11596 | return 0; | |
11597 | ||
4c52953f | 11598 | ret = 0; |
70cc837d | 11599 | if (isec->reloc_count != 0) |
9b5ecbd0 | 11600 | { |
70cc837d AM |
11601 | Elf_Internal_Rela *relstart, *rel; |
11602 | Elf_Internal_Sym *local_syms; | |
11603 | struct ppc_link_hash_table *htab; | |
2917689a | 11604 | |
70cc837d AM |
11605 | relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL, |
11606 | info->keep_memory); | |
11607 | if (relstart == NULL) | |
11608 | return -1; | |
90aecf7a | 11609 | |
70cc837d AM |
11610 | /* Look for branches to outside of this section. */ |
11611 | local_syms = NULL; | |
11612 | htab = ppc_hash_table (info); | |
11613 | if (htab == NULL) | |
11614 | return -1; | |
4c52953f | 11615 | |
70cc837d | 11616 | for (rel = relstart; rel < relstart + isec->reloc_count; ++rel) |
4c52953f | 11617 | { |
70cc837d AM |
11618 | enum elf_ppc64_reloc_type r_type; |
11619 | unsigned long r_symndx; | |
11620 | struct elf_link_hash_entry *h; | |
11621 | struct ppc_link_hash_entry *eh; | |
11622 | Elf_Internal_Sym *sym; | |
11623 | asection *sym_sec; | |
11624 | struct _opd_sec_data *opd; | |
11625 | bfd_vma sym_value; | |
11626 | bfd_vma dest; | |
11627 | ||
11628 | r_type = ELF64_R_TYPE (rel->r_info); | |
11629 | if (r_type != R_PPC64_REL24 | |
05d0e962 | 11630 | && r_type != R_PPC64_REL24_NOTOC |
70cc837d AM |
11631 | && r_type != R_PPC64_REL14 |
11632 | && r_type != R_PPC64_REL14_BRTAKEN | |
23cedd1d AM |
11633 | && r_type != R_PPC64_REL14_BRNTAKEN |
11634 | && r_type != R_PPC64_PLTCALL) | |
70cc837d | 11635 | continue; |
4c52953f | 11636 | |
70cc837d AM |
11637 | r_symndx = ELF64_R_SYM (rel->r_info); |
11638 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx, | |
11639 | isec->owner)) | |
4c52953f | 11640 | { |
70cc837d AM |
11641 | ret = -1; |
11642 | break; | |
11643 | } | |
4c52953f | 11644 | |
70cc837d AM |
11645 | /* Calls to dynamic lib functions go through a plt call stub |
11646 | that uses r2. */ | |
11647 | eh = (struct ppc_link_hash_entry *) h; | |
11648 | if (eh != NULL | |
11649 | && (eh->elf.plt.plist != NULL | |
11650 | || (eh->oh != NULL | |
11651 | && ppc_follow_link (eh->oh)->elf.plt.plist != NULL))) | |
11652 | { | |
11653 | ret = 1; | |
11654 | break; | |
4c52953f AM |
11655 | } |
11656 | ||
70cc837d AM |
11657 | if (sym_sec == NULL) |
11658 | /* Ignore other undefined symbols. */ | |
4c52953f | 11659 | continue; |
4c52953f | 11660 | |
70cc837d AM |
11661 | /* Assume branches to other sections not included in the |
11662 | link need stubs too, to cover -R and absolute syms. */ | |
11663 | if (sym_sec->output_section == NULL) | |
11664 | { | |
11665 | ret = 1; | |
11666 | break; | |
11667 | } | |
4c52953f | 11668 | |
70cc837d AM |
11669 | if (h == NULL) |
11670 | sym_value = sym->st_value; | |
11671 | else | |
11672 | { | |
11673 | if (h->root.type != bfd_link_hash_defined | |
11674 | && h->root.type != bfd_link_hash_defweak) | |
11675 | abort (); | |
11676 | sym_value = h->root.u.def.value; | |
11677 | } | |
11678 | sym_value += rel->r_addend; | |
4c52953f | 11679 | |
70cc837d AM |
11680 | /* If this branch reloc uses an opd sym, find the code section. */ |
11681 | opd = get_opd_info (sym_sec); | |
11682 | if (opd != NULL) | |
11683 | { | |
11684 | if (h == NULL && opd->adjust != NULL) | |
11685 | { | |
11686 | long adjust; | |
4c52953f | 11687 | |
92a9c616 | 11688 | adjust = opd->adjust[OPD_NDX (sym_value)]; |
70cc837d AM |
11689 | if (adjust == -1) |
11690 | /* Assume deleted functions won't ever be called. */ | |
11691 | continue; | |
11692 | sym_value += adjust; | |
11693 | } | |
4c52953f | 11694 | |
aef36ac1 AM |
11695 | dest = opd_entry_value (sym_sec, sym_value, |
11696 | &sym_sec, NULL, FALSE); | |
70cc837d AM |
11697 | if (dest == (bfd_vma) -1) |
11698 | continue; | |
11699 | } | |
11700 | else | |
11701 | dest = (sym_value | |
11702 | + sym_sec->output_offset | |
11703 | + sym_sec->output_section->vma); | |
4c52953f | 11704 | |
70cc837d AM |
11705 | /* Ignore branch to self. */ |
11706 | if (sym_sec == isec) | |
11707 | continue; | |
4c52953f | 11708 | |
70cc837d AM |
11709 | /* If the called function uses the toc, we need a stub. */ |
11710 | if (sym_sec->has_toc_reloc | |
11711 | || sym_sec->makes_toc_func_call) | |
4c52953f | 11712 | { |
70cc837d | 11713 | ret = 1; |
4c52953f AM |
11714 | break; |
11715 | } | |
70cc837d AM |
11716 | |
11717 | /* Assume any branch that needs a long branch stub might in fact | |
11718 | need a plt_branch stub. A plt_branch stub uses r2. */ | |
11719 | else if (dest - (isec->output_offset | |
11720 | + isec->output_section->vma | |
6911b7dc AM |
11721 | + rel->r_offset) + (1 << 25) |
11722 | >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h | |
11723 | ? h->other | |
11724 | : sym->st_other)) | |
4c52953f | 11725 | { |
70cc837d AM |
11726 | ret = 1; |
11727 | break; | |
11728 | } | |
11729 | ||
11730 | /* If calling back to a section in the process of being | |
11731 | tested, we can't say for sure that no toc adjusting stubs | |
11732 | are needed, so don't return zero. */ | |
11733 | else if (sym_sec->call_check_in_progress) | |
11734 | ret = 2; | |
11735 | ||
11736 | /* Branches to another section that itself doesn't have any TOC | |
11737 | references are OK. Recursively call ourselves to check. */ | |
11738 | else if (!sym_sec->call_check_done) | |
11739 | { | |
11740 | int recur; | |
11741 | ||
11742 | /* Mark current section as indeterminate, so that other | |
11743 | sections that call back to current won't be marked as | |
11744 | known. */ | |
11745 | isec->call_check_in_progress = 1; | |
11746 | recur = toc_adjusting_stub_needed (info, sym_sec); | |
11747 | isec->call_check_in_progress = 0; | |
11748 | ||
4c52953f AM |
11749 | if (recur != 0) |
11750 | { | |
70cc837d AM |
11751 | ret = recur; |
11752 | if (recur != 2) | |
11753 | break; | |
4c52953f AM |
11754 | } |
11755 | } | |
4c52953f | 11756 | } |
70cc837d AM |
11757 | |
11758 | if (local_syms != NULL | |
11759 | && (elf_symtab_hdr (isec->owner).contents | |
11760 | != (unsigned char *) local_syms)) | |
11761 | free (local_syms); | |
11762 | if (elf_section_data (isec)->relocs != relstart) | |
11763 | free (relstart); | |
9b5ecbd0 AM |
11764 | } |
11765 | ||
70cc837d AM |
11766 | if ((ret & 1) == 0 |
11767 | && isec->map_head.s != NULL | |
11768 | && (strcmp (isec->output_section->name, ".init") == 0 | |
11769 | || strcmp (isec->output_section->name, ".fini") == 0)) | |
11770 | { | |
11771 | if (isec->map_head.s->has_toc_reloc | |
11772 | || isec->map_head.s->makes_toc_func_call) | |
11773 | ret = 1; | |
11774 | else if (!isec->map_head.s->call_check_done) | |
11775 | { | |
11776 | int recur; | |
11777 | isec->call_check_in_progress = 1; | |
11778 | recur = toc_adjusting_stub_needed (info, isec->map_head.s); | |
11779 | isec->call_check_in_progress = 0; | |
11780 | if (recur != 0) | |
11781 | ret = recur; | |
11782 | } | |
11783 | } | |
11784 | ||
11785 | if (ret == 1) | |
11786 | isec->makes_toc_func_call = 1; | |
4c52953f | 11787 | |
9b5ecbd0 AM |
11788 | return ret; |
11789 | } | |
11790 | ||
721956f4 AM |
11791 | /* The linker repeatedly calls this function for each input section, |
11792 | in the order that input sections are linked into output sections. | |
11793 | Build lists of input sections to determine groupings between which | |
11794 | we may insert linker stubs. */ | |
11795 | ||
9b5ecbd0 | 11796 | bfd_boolean |
4ce794b7 | 11797 | ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec) |
721956f4 AM |
11798 | { |
11799 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
11800 | ||
4dfe6ac6 NC |
11801 | if (htab == NULL) |
11802 | return FALSE; | |
11803 | ||
734b6cf9 | 11804 | if ((isec->output_section->flags & SEC_CODE) != 0 |
6f20ed8a | 11805 | && isec->output_section->id < htab->sec_info_arr_size) |
721956f4 | 11806 | { |
3d6f9012 AM |
11807 | /* This happens to make the list in reverse order, |
11808 | which is what we want. */ | |
6f20ed8a AM |
11809 | htab->sec_info[isec->id].u.list |
11810 | = htab->sec_info[isec->output_section->id].u.list; | |
11811 | htab->sec_info[isec->output_section->id].u.list = isec; | |
721956f4 | 11812 | } |
ad8e1ba5 | 11813 | |
4c52953f | 11814 | if (htab->multi_toc_needed) |
9b5ecbd0 | 11815 | { |
8b974ba3 AM |
11816 | /* Analyse sections that aren't already flagged as needing a |
11817 | valid toc pointer. Exclude .fixup for the linux kernel. | |
11818 | .fixup contains branches, but only back to the function that | |
11819 | hit an exception. */ | |
11820 | if (!(isec->has_toc_reloc | |
11821 | || (isec->flags & SEC_CODE) == 0 | |
11822 | || strcmp (isec->name, ".fixup") == 0 | |
11823 | || isec->call_check_done)) | |
11824 | { | |
11825 | if (toc_adjusting_stub_needed (info, isec) < 0) | |
6683a28d | 11826 | return FALSE; |
8b974ba3 AM |
11827 | } |
11828 | /* Make all sections use the TOC assigned for this object file. | |
11829 | This will be wrong for pasted sections; We fix that in | |
11830 | check_pasted_section(). */ | |
11831 | if (elf_gp (isec->owner) != 0) | |
11832 | htab->toc_curr = elf_gp (isec->owner); | |
11833 | } | |
11834 | ||
6f20ed8a | 11835 | htab->sec_info[isec->id].toc_off = htab->toc_curr; |
9b5ecbd0 | 11836 | return TRUE; |
721956f4 AM |
11837 | } |
11838 | ||
70cc837d AM |
11839 | /* Check that all .init and .fini sections use the same toc, if they |
11840 | have toc relocs. */ | |
11841 | ||
11842 | static bfd_boolean | |
11843 | check_pasted_section (struct bfd_link_info *info, const char *name) | |
11844 | { | |
11845 | asection *o = bfd_get_section_by_name (info->output_bfd, name); | |
11846 | ||
11847 | if (o != NULL) | |
11848 | { | |
11849 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
11850 | bfd_vma toc_off = 0; | |
11851 | asection *i; | |
11852 | ||
11853 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) | |
11854 | if (i->has_toc_reloc) | |
11855 | { | |
11856 | if (toc_off == 0) | |
6f20ed8a AM |
11857 | toc_off = htab->sec_info[i->id].toc_off; |
11858 | else if (toc_off != htab->sec_info[i->id].toc_off) | |
70cc837d AM |
11859 | return FALSE; |
11860 | } | |
6683a28d AM |
11861 | |
11862 | if (toc_off == 0) | |
11863 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) | |
11864 | if (i->makes_toc_func_call) | |
11865 | { | |
6f20ed8a | 11866 | toc_off = htab->sec_info[i->id].toc_off; |
6683a28d AM |
11867 | break; |
11868 | } | |
11869 | ||
70cc837d AM |
11870 | /* Make sure the whole pasted function uses the same toc offset. */ |
11871 | if (toc_off != 0) | |
11872 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) | |
6f20ed8a | 11873 | htab->sec_info[i->id].toc_off = toc_off; |
70cc837d AM |
11874 | } |
11875 | return TRUE; | |
11876 | } | |
11877 | ||
11878 | bfd_boolean | |
11879 | ppc64_elf_check_init_fini (struct bfd_link_info *info) | |
11880 | { | |
11881 | return (check_pasted_section (info, ".init") | |
11882 | & check_pasted_section (info, ".fini")); | |
11883 | } | |
11884 | ||
721956f4 AM |
11885 | /* See whether we can group stub sections together. Grouping stub |
11886 | sections may result in fewer stubs. More importantly, we need to | |
11887 | put all .init* and .fini* stubs at the beginning of the .init or | |
11888 | .fini output sections respectively, because glibc splits the | |
11889 | _init and _fini functions into multiple parts. Putting a stub in | |
11890 | the middle of a function is not a good idea. */ | |
11891 | ||
6f20ed8a AM |
11892 | static bfd_boolean |
11893 | group_sections (struct bfd_link_info *info, | |
4ce794b7 AM |
11894 | bfd_size_type stub_group_size, |
11895 | bfd_boolean stubs_always_before_branch) | |
721956f4 | 11896 | { |
6f20ed8a AM |
11897 | struct ppc_link_hash_table *htab; |
11898 | asection *osec; | |
7c8fe5c4 AM |
11899 | bfd_boolean suppress_size_errors; |
11900 | ||
6f20ed8a AM |
11901 | htab = ppc_hash_table (info); |
11902 | if (htab == NULL) | |
11903 | return FALSE; | |
11904 | ||
7c8fe5c4 | 11905 | suppress_size_errors = FALSE; |
7c8fe5c4 AM |
11906 | if (stub_group_size == 1) |
11907 | { | |
11908 | /* Default values. */ | |
11909 | if (stubs_always_before_branch) | |
09f92717 | 11910 | stub_group_size = 0x1e00000; |
7c8fe5c4 | 11911 | else |
09f92717 | 11912 | stub_group_size = 0x1c00000; |
7c8fe5c4 AM |
11913 | suppress_size_errors = TRUE; |
11914 | } | |
11915 | ||
6f20ed8a | 11916 | for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next) |
721956f4 | 11917 | { |
6f20ed8a AM |
11918 | asection *tail; |
11919 | ||
11920 | if (osec->id >= htab->sec_info_arr_size) | |
11921 | continue; | |
11922 | ||
11923 | tail = htab->sec_info[osec->id].u.list; | |
734b6cf9 | 11924 | while (tail != NULL) |
721956f4 | 11925 | { |
734b6cf9 AM |
11926 | asection *curr; |
11927 | asection *prev; | |
11928 | bfd_size_type total; | |
11929 | bfd_boolean big_sec; | |
11930 | bfd_vma curr_toc; | |
6f20ed8a | 11931 | struct map_stub *group; |
09f92717 | 11932 | bfd_size_type group_size; |
734b6cf9 AM |
11933 | |
11934 | curr = tail; | |
eea6121a | 11935 | total = tail->size; |
09f92717 AM |
11936 | group_size = (ppc64_elf_section_data (tail) != NULL |
11937 | && ppc64_elf_section_data (tail)->has_14bit_branch | |
11938 | ? stub_group_size >> 10 : stub_group_size); | |
11939 | ||
11940 | big_sec = total > group_size; | |
7c8fe5c4 | 11941 | if (big_sec && !suppress_size_errors) |
695344c0 | 11942 | /* xgettext:c-format */ |
871b3ab2 | 11943 | _bfd_error_handler (_("%pB section %pA exceeds stub group size"), |
4eca0228 | 11944 | tail->owner, tail); |
6f20ed8a | 11945 | curr_toc = htab->sec_info[tail->id].toc_off; |
734b6cf9 | 11946 | |
6f20ed8a | 11947 | while ((prev = htab->sec_info[curr->id].u.list) != NULL |
734b6cf9 | 11948 | && ((total += curr->output_offset - prev->output_offset) |
6bee8834 AM |
11949 | < (ppc64_elf_section_data (prev) != NULL |
11950 | && ppc64_elf_section_data (prev)->has_14bit_branch | |
09f92717 | 11951 | ? (group_size = stub_group_size >> 10) : group_size)) |
6f20ed8a | 11952 | && htab->sec_info[prev->id].toc_off == curr_toc) |
734b6cf9 AM |
11953 | curr = prev; |
11954 | ||
11955 | /* OK, the size from the start of CURR to the end is less | |
09f92717 | 11956 | than group_size and thus can be handled by one stub |
734b6cf9 | 11957 | section. (or the tail section is itself larger than |
09f92717 AM |
11958 | group_size, in which case we may be toast.) We should |
11959 | really be keeping track of the total size of stubs added | |
11960 | here, as stubs contribute to the final output section | |
11961 | size. That's a little tricky, and this way will only | |
11962 | break if stubs added make the total size more than 2^25, | |
11963 | ie. for the default stub_group_size, if stubs total more | |
11964 | than 2097152 bytes, or nearly 75000 plt call stubs. */ | |
6f20ed8a AM |
11965 | group = bfd_alloc (curr->owner, sizeof (*group)); |
11966 | if (group == NULL) | |
11967 | return FALSE; | |
11968 | group->link_sec = curr; | |
11969 | group->stub_sec = NULL; | |
a4b6fadd | 11970 | group->needs_save_res = 0; |
df136d64 AM |
11971 | group->lr_restore = 0; |
11972 | group->eh_size = 0; | |
11973 | group->eh_base = 0; | |
a4b6fadd AM |
11974 | group->next = htab->group; |
11975 | htab->group = group; | |
734b6cf9 | 11976 | do |
721956f4 | 11977 | { |
6f20ed8a | 11978 | prev = htab->sec_info[tail->id].u.list; |
734b6cf9 | 11979 | /* Set up this stub group. */ |
6f20ed8a | 11980 | htab->sec_info[tail->id].u.group = group; |
721956f4 | 11981 | } |
734b6cf9 AM |
11982 | while (tail != curr && (tail = prev) != NULL); |
11983 | ||
09f92717 | 11984 | /* But wait, there's more! Input sections up to group_size |
734b6cf9 AM |
11985 | bytes before the stub section can be handled by it too. |
11986 | Don't do this if we have a really large section after the | |
11987 | stubs, as adding more stubs increases the chance that | |
11988 | branches may not reach into the stub section. */ | |
11989 | if (!stubs_always_before_branch && !big_sec) | |
11990 | { | |
11991 | total = 0; | |
11992 | while (prev != NULL | |
11993 | && ((total += tail->output_offset - prev->output_offset) | |
6bee8834 AM |
11994 | < (ppc64_elf_section_data (prev) != NULL |
11995 | && ppc64_elf_section_data (prev)->has_14bit_branch | |
2cdcc330 AM |
11996 | ? (group_size = stub_group_size >> 10) |
11997 | : group_size)) | |
6f20ed8a | 11998 | && htab->sec_info[prev->id].toc_off == curr_toc) |
734b6cf9 AM |
11999 | { |
12000 | tail = prev; | |
6f20ed8a AM |
12001 | prev = htab->sec_info[tail->id].u.list; |
12002 | htab->sec_info[tail->id].u.group = group; | |
734b6cf9 AM |
12003 | } |
12004 | } | |
12005 | tail = prev; | |
721956f4 AM |
12006 | } |
12007 | } | |
6f20ed8a | 12008 | return TRUE; |
721956f4 AM |
12009 | } |
12010 | ||
58d180e8 AM |
12011 | static const unsigned char glink_eh_frame_cie[] = |
12012 | { | |
12013 | 0, 0, 0, 16, /* length. */ | |
12014 | 0, 0, 0, 0, /* id. */ | |
12015 | 1, /* CIE version. */ | |
12016 | 'z', 'R', 0, /* Augmentation string. */ | |
12017 | 4, /* Code alignment. */ | |
12018 | 0x78, /* Data alignment. */ | |
12019 | 65, /* RA reg. */ | |
12020 | 1, /* Augmentation size. */ | |
12021 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ | |
2e0ce1c8 | 12022 | DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */ |
58d180e8 AM |
12023 | }; |
12024 | ||
d969d15f AM |
12025 | /* Stripping output sections is normally done before dynamic section |
12026 | symbols have been allocated. This function is called later, and | |
12027 | handles cases like htab->brlt which is mapped to its own output | |
12028 | section. */ | |
12029 | ||
12030 | static void | |
12031 | maybe_strip_output (struct bfd_link_info *info, asection *isec) | |
12032 | { | |
12033 | if (isec->size == 0 | |
12034 | && isec->output_section->size == 0 | |
53d8967a | 12035 | && !(isec->output_section->flags & SEC_KEEP) |
d969d15f AM |
12036 | && !bfd_section_removed_from_list (info->output_bfd, |
12037 | isec->output_section) | |
12038 | && elf_section_data (isec->output_section)->dynindx == 0) | |
12039 | { | |
12040 | isec->output_section->flags |= SEC_EXCLUDE; | |
12041 | bfd_section_list_remove (info->output_bfd, isec->output_section); | |
12042 | info->output_bfd->section_count--; | |
12043 | } | |
12044 | } | |
12045 | ||
721956f4 AM |
12046 | /* Determine and set the size of the stub section for a final link. |
12047 | ||
12048 | The basic idea here is to examine all the relocations looking for | |
12049 | PC-relative calls to a target that is unreachable with a "bl" | |
12050 | instruction. */ | |
12051 | ||
b34976b6 | 12052 | bfd_boolean |
e7d1c40c | 12053 | ppc64_elf_size_stubs (struct bfd_link_info *info) |
721956f4 AM |
12054 | { |
12055 | bfd_size_type stub_group_size; | |
b34976b6 | 12056 | bfd_boolean stubs_always_before_branch; |
721956f4 AM |
12057 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
12058 | ||
4dfe6ac6 NC |
12059 | if (htab == NULL) |
12060 | return FALSE; | |
12061 | ||
0e1862bb | 12062 | if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info)) |
e7d1c40c | 12063 | htab->params->plt_thread_safe = 1; |
b9e5796b | 12064 | if (!htab->opd_abi) |
e7d1c40c AM |
12065 | htab->params->plt_thread_safe = 0; |
12066 | else if (htab->params->plt_thread_safe == -1) | |
794e51c0 | 12067 | { |
e2458743 | 12068 | static const char *const thread_starter[] = |
794e51c0 AM |
12069 | { |
12070 | "pthread_create", | |
12071 | /* libstdc++ */ | |
12072 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", | |
12073 | /* librt */ | |
12074 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", | |
12075 | "mq_notify", "create_timer", | |
12076 | /* libanl */ | |
12077 | "getaddrinfo_a", | |
12078 | /* libgomp */ | |
2300b5a1 | 12079 | "GOMP_parallel", |
794e51c0 | 12080 | "GOMP_parallel_start", |
2300b5a1 | 12081 | "GOMP_parallel_loop_static", |
794e51c0 | 12082 | "GOMP_parallel_loop_static_start", |
2300b5a1 | 12083 | "GOMP_parallel_loop_dynamic", |
794e51c0 | 12084 | "GOMP_parallel_loop_dynamic_start", |
2300b5a1 | 12085 | "GOMP_parallel_loop_guided", |
794e51c0 | 12086 | "GOMP_parallel_loop_guided_start", |
2300b5a1 | 12087 | "GOMP_parallel_loop_runtime", |
794e51c0 | 12088 | "GOMP_parallel_loop_runtime_start", |
2300b5a1 | 12089 | "GOMP_parallel_sections", |
68ffbac6 | 12090 | "GOMP_parallel_sections_start", |
f9dffbf0 AM |
12091 | /* libgo */ |
12092 | "__go_go", | |
794e51c0 AM |
12093 | }; |
12094 | unsigned i; | |
12095 | ||
a4b6fadd | 12096 | for (i = 0; i < ARRAY_SIZE (thread_starter); i++) |
794e51c0 AM |
12097 | { |
12098 | struct elf_link_hash_entry *h; | |
12099 | h = elf_link_hash_lookup (&htab->elf, thread_starter[i], | |
12100 | FALSE, FALSE, TRUE); | |
e7d1c40c AM |
12101 | htab->params->plt_thread_safe = h != NULL && h->ref_regular; |
12102 | if (htab->params->plt_thread_safe) | |
794e51c0 AM |
12103 | break; |
12104 | } | |
12105 | } | |
e7d1c40c AM |
12106 | stubs_always_before_branch = htab->params->group_size < 0; |
12107 | if (htab->params->group_size < 0) | |
12108 | stub_group_size = -htab->params->group_size; | |
721956f4 | 12109 | else |
e7d1c40c | 12110 | stub_group_size = htab->params->group_size; |
721956f4 | 12111 | |
6f20ed8a AM |
12112 | if (!group_sections (info, stub_group_size, stubs_always_before_branch)) |
12113 | return FALSE; | |
721956f4 | 12114 | |
c9301e31 AM |
12115 | #define STUB_SHRINK_ITER 20 |
12116 | /* Loop until no stubs added. After iteration 20 of this loop we may | |
12117 | exit on a stub section shrinking. This is to break out of a | |
12118 | pathological case where adding stubs on one iteration decreases | |
12119 | section gaps (perhaps due to alignment), which then requires | |
12120 | fewer or smaller stubs on the next iteration. */ | |
12121 | ||
721956f4 AM |
12122 | while (1) |
12123 | { | |
12124 | bfd *input_bfd; | |
12125 | unsigned int bfd_indx; | |
a4b6fadd | 12126 | struct map_stub *group; |
721956f4 AM |
12127 | |
12128 | htab->stub_iteration += 1; | |
721956f4 AM |
12129 | |
12130 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
12131 | input_bfd != NULL; | |
c72f2fb2 | 12132 | input_bfd = input_bfd->link.next, bfd_indx++) |
721956f4 AM |
12133 | { |
12134 | Elf_Internal_Shdr *symtab_hdr; | |
12135 | asection *section; | |
6cdc0ccc | 12136 | Elf_Internal_Sym *local_syms = NULL; |
721956f4 | 12137 | |
0c8d6e5c | 12138 | if (!is_ppc64_elf (input_bfd)) |
67f93c31 AM |
12139 | continue; |
12140 | ||
721956f4 | 12141 | /* We'll need the symbol table in a second. */ |
0ffa91dd | 12142 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
721956f4 AM |
12143 | if (symtab_hdr->sh_info == 0) |
12144 | continue; | |
12145 | ||
721956f4 AM |
12146 | /* Walk over each section attached to the input bfd. */ |
12147 | for (section = input_bfd->sections; | |
12148 | section != NULL; | |
12149 | section = section->next) | |
12150 | { | |
721956f4 | 12151 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
721956f4 AM |
12152 | |
12153 | /* If there aren't any relocs, then there's nothing more | |
12154 | to do. */ | |
12155 | if ((section->flags & SEC_RELOC) == 0 | |
12c0f757 AM |
12156 | || (section->flags & SEC_ALLOC) == 0 |
12157 | || (section->flags & SEC_LOAD) == 0 | |
12158 | || (section->flags & SEC_CODE) == 0 | |
721956f4 AM |
12159 | || section->reloc_count == 0) |
12160 | continue; | |
12161 | ||
12162 | /* If this section is a link-once section that will be | |
12163 | discarded, then don't create any stubs. */ | |
12164 | if (section->output_section == NULL | |
927be08e | 12165 | || section->output_section->owner != info->output_bfd) |
721956f4 AM |
12166 | continue; |
12167 | ||
1e2f5b6e AM |
12168 | /* Get the relocs. */ |
12169 | internal_relocs | |
4ce794b7 | 12170 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, |
45d6a902 | 12171 | info->keep_memory); |
721956f4 | 12172 | if (internal_relocs == NULL) |
1e2f5b6e | 12173 | goto error_ret_free_local; |
721956f4 AM |
12174 | |
12175 | /* Now examine each relocation. */ | |
12176 | irela = internal_relocs; | |
12177 | irelaend = irela + section->reloc_count; | |
12178 | for (; irela < irelaend; irela++) | |
12179 | { | |
4ce794b7 AM |
12180 | enum elf_ppc64_reloc_type r_type; |
12181 | unsigned int r_indx; | |
721956f4 AM |
12182 | enum ppc_stub_type stub_type; |
12183 | struct ppc_stub_hash_entry *stub_entry; | |
8387904d | 12184 | asection *sym_sec, *code_sec; |
e054468f | 12185 | bfd_vma sym_value, code_value; |
721956f4 | 12186 | bfd_vma destination; |
6911b7dc | 12187 | unsigned long local_off; |
8843416a | 12188 | bfd_boolean ok_dest; |
721956f4 | 12189 | struct ppc_link_hash_entry *hash; |
8387904d | 12190 | struct ppc_link_hash_entry *fdh; |
411e1bfb AM |
12191 | struct elf_link_hash_entry *h; |
12192 | Elf_Internal_Sym *sym; | |
721956f4 AM |
12193 | char *stub_name; |
12194 | const asection *id_sec; | |
74f0fb50 | 12195 | struct _opd_sec_data *opd; |
e054468f | 12196 | struct plt_entry *plt_ent; |
721956f4 AM |
12197 | |
12198 | r_type = ELF64_R_TYPE (irela->r_info); | |
12199 | r_indx = ELF64_R_SYM (irela->r_info); | |
12200 | ||
4ce794b7 | 12201 | if (r_type >= R_PPC64_max) |
721956f4 AM |
12202 | { |
12203 | bfd_set_error (bfd_error_bad_value); | |
6cdc0ccc | 12204 | goto error_ret_free_internal; |
721956f4 AM |
12205 | } |
12206 | ||
12207 | /* Only look for stubs on branch instructions. */ | |
4ce794b7 | 12208 | if (r_type != R_PPC64_REL24 |
05d0e962 | 12209 | && r_type != R_PPC64_REL24_NOTOC |
4ce794b7 AM |
12210 | && r_type != R_PPC64_REL14 |
12211 | && r_type != R_PPC64_REL14_BRTAKEN | |
12212 | && r_type != R_PPC64_REL14_BRNTAKEN) | |
721956f4 AM |
12213 | continue; |
12214 | ||
12215 | /* Now determine the call target, its name, value, | |
12216 | section. */ | |
411e1bfb AM |
12217 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
12218 | r_indx, input_bfd)) | |
12219 | goto error_ret_free_internal; | |
12220 | hash = (struct ppc_link_hash_entry *) h; | |
12221 | ||
8843416a | 12222 | ok_dest = FALSE; |
8387904d | 12223 | fdh = NULL; |
7fe2b9a6 | 12224 | sym_value = 0; |
411e1bfb | 12225 | if (hash == NULL) |
721956f4 | 12226 | { |
411e1bfb | 12227 | sym_value = sym->st_value; |
c27b8c2a AM |
12228 | if (sym_sec != NULL |
12229 | && sym_sec->output_section != NULL) | |
12230 | ok_dest = TRUE; | |
721956f4 | 12231 | } |
7fe2b9a6 AM |
12232 | else if (hash->elf.root.type == bfd_link_hash_defined |
12233 | || hash->elf.root.type == bfd_link_hash_defweak) | |
12234 | { | |
12235 | sym_value = hash->elf.root.u.def.value; | |
12236 | if (sym_sec->output_section != NULL) | |
12237 | ok_dest = TRUE; | |
12238 | } | |
12239 | else if (hash->elf.root.type == bfd_link_hash_undefweak | |
12240 | || hash->elf.root.type == bfd_link_hash_undefined) | |
721956f4 | 12241 | { |
99877b66 | 12242 | /* Recognise an old ABI func code entry sym, and |
7fe2b9a6 AM |
12243 | use the func descriptor sym instead if it is |
12244 | defined. */ | |
ceb1f1ef | 12245 | if (hash->elf.root.root.string[0] == '.' |
8c5b4e52 | 12246 | && hash->oh != NULL) |
8387904d | 12247 | { |
8c5b4e52 | 12248 | fdh = ppc_follow_link (hash->oh); |
8387904d AM |
12249 | if (fdh->elf.root.type == bfd_link_hash_defined |
12250 | || fdh->elf.root.type == bfd_link_hash_defweak) | |
12251 | { | |
12252 | sym_sec = fdh->elf.root.u.def.section; | |
12253 | sym_value = fdh->elf.root.u.def.value; | |
12254 | if (sym_sec->output_section != NULL) | |
12255 | ok_dest = TRUE; | |
12256 | } | |
99877b66 AM |
12257 | else |
12258 | fdh = NULL; | |
8387904d | 12259 | } |
7fe2b9a6 AM |
12260 | } |
12261 | else | |
12262 | { | |
12263 | bfd_set_error (bfd_error_bad_value); | |
12264 | goto error_ret_free_internal; | |
721956f4 AM |
12265 | } |
12266 | ||
8843416a | 12267 | destination = 0; |
6911b7dc | 12268 | local_off = 0; |
8843416a AM |
12269 | if (ok_dest) |
12270 | { | |
12271 | sym_value += irela->r_addend; | |
12272 | destination = (sym_value | |
12273 | + sym_sec->output_offset | |
12274 | + sym_sec->output_section->vma); | |
6911b7dc AM |
12275 | local_off = PPC64_LOCAL_ENTRY_OFFSET (hash |
12276 | ? hash->elf.other | |
12277 | : sym->st_other); | |
8843416a AM |
12278 | } |
12279 | ||
8387904d | 12280 | code_sec = sym_sec; |
e054468f | 12281 | code_value = sym_value; |
74f0fb50 AM |
12282 | opd = get_opd_info (sym_sec); |
12283 | if (opd != NULL) | |
8387904d AM |
12284 | { |
12285 | bfd_vma dest; | |
12286 | ||
74f0fb50 | 12287 | if (hash == NULL && opd->adjust != NULL) |
8387904d | 12288 | { |
51aecdc5 | 12289 | long adjust = opd->adjust[OPD_NDX (sym_value)]; |
8387904d AM |
12290 | if (adjust == -1) |
12291 | continue; | |
e054468f | 12292 | code_value += adjust; |
8387904d AM |
12293 | sym_value += adjust; |
12294 | } | |
12295 | dest = opd_entry_value (sym_sec, sym_value, | |
aef36ac1 | 12296 | &code_sec, &code_value, FALSE); |
8387904d AM |
12297 | if (dest != (bfd_vma) -1) |
12298 | { | |
12299 | destination = dest; | |
12300 | if (fdh != NULL) | |
12301 | { | |
12302 | /* Fixup old ABI sym to point at code | |
12303 | entry. */ | |
99877b66 | 12304 | hash->elf.root.type = bfd_link_hash_defweak; |
8387904d | 12305 | hash->elf.root.u.def.section = code_sec; |
e054468f | 12306 | hash->elf.root.u.def.value = code_value; |
8387904d AM |
12307 | } |
12308 | } | |
12309 | } | |
12310 | ||
721956f4 | 12311 | /* Determine what (if any) linker stub is needed. */ |
e054468f | 12312 | plt_ent = NULL; |
721956f4 | 12313 | stub_type = ppc_type_of_stub (section, irela, &hash, |
6911b7dc AM |
12314 | &plt_ent, destination, |
12315 | local_off); | |
ad8e1ba5 | 12316 | |
05d0e962 AM |
12317 | if (r_type == R_PPC64_REL24_NOTOC) |
12318 | { | |
12319 | if (stub_type == ppc_stub_plt_call) | |
12320 | stub_type = ppc_stub_plt_call_notoc; | |
12321 | else if (stub_type == ppc_stub_long_branch | |
12322 | || (code_sec != NULL | |
12323 | && code_sec->output_section != NULL | |
12324 | && (((hash ? hash->elf.other : sym->st_other) | |
12325 | & STO_PPC64_LOCAL_MASK) | |
12326 | != 1 << STO_PPC64_LOCAL_BIT))) | |
12327 | stub_type = ppc_stub_long_branch_notoc; | |
12328 | } | |
12329 | else if (stub_type != ppc_stub_plt_call) | |
ad8e1ba5 AM |
12330 | { |
12331 | /* Check whether we need a TOC adjusting stub. | |
12332 | Since the linker pastes together pieces from | |
12333 | different object files when creating the | |
12334 | _init and _fini functions, it may be that a | |
12335 | call to what looks like a local sym is in | |
12336 | fact a call needing a TOC adjustment. */ | |
33cb30a1 AM |
12337 | if ((code_sec != NULL |
12338 | && code_sec->output_section != NULL | |
12339 | && (htab->sec_info[code_sec->id].toc_off | |
12340 | != htab->sec_info[section->id].toc_off) | |
12341 | && (code_sec->has_toc_reloc | |
12342 | || code_sec->makes_toc_func_call)) | |
12343 | || (((hash ? hash->elf.other : sym->st_other) | |
12344 | & STO_PPC64_LOCAL_MASK) | |
12345 | == 1 << STO_PPC64_LOCAL_BIT)) | |
ad8e1ba5 AM |
12346 | stub_type = ppc_stub_long_branch_r2off; |
12347 | } | |
12348 | ||
721956f4 AM |
12349 | if (stub_type == ppc_stub_none) |
12350 | continue; | |
12351 | ||
411e1bfb AM |
12352 | /* __tls_get_addr calls might be eliminated. */ |
12353 | if (stub_type != ppc_stub_plt_call | |
05d0e962 | 12354 | && stub_type != ppc_stub_plt_call_notoc |
411e1bfb | 12355 | && hash != NULL |
8387904d AM |
12356 | && (hash == htab->tls_get_addr |
12357 | || hash == htab->tls_get_addr_fd) | |
411e1bfb AM |
12358 | && section->has_tls_reloc |
12359 | && irela != internal_relocs) | |
12360 | { | |
12361 | /* Get tls info. */ | |
f961d9dd | 12362 | unsigned char *tls_mask; |
411e1bfb | 12363 | |
3a71aa26 | 12364 | if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms, |
411e1bfb AM |
12365 | irela - 1, input_bfd)) |
12366 | goto error_ret_free_internal; | |
37da22e5 | 12367 | if ((*tls_mask & TLS_TLS) != 0) |
411e1bfb AM |
12368 | continue; |
12369 | } | |
12370 | ||
f378ab09 | 12371 | if (stub_type == ppc_stub_plt_call) |
794e51c0 | 12372 | { |
6e1816be AM |
12373 | if (!htab->opd_abi |
12374 | && htab->params->plt_localentry0 != 0 | |
12375 | && is_elfv2_localentry0 (&hash->elf)) | |
12376 | htab->has_plt_localentry0 = 1; | |
12377 | else if (irela + 1 < irelaend | |
12378 | && irela[1].r_offset == irela->r_offset + 4 | |
12379 | && (ELF64_R_TYPE (irela[1].r_info) | |
12380 | == R_PPC64_TOCSAVE)) | |
f378ab09 AM |
12381 | { |
12382 | if (!tocsave_find (htab, INSERT, | |
12383 | &local_syms, irela + 1, input_bfd)) | |
12384 | goto error_ret_free_internal; | |
12385 | } | |
f378ab09 AM |
12386 | else |
12387 | stub_type = ppc_stub_plt_call_r2save; | |
794e51c0 | 12388 | } |
3b421ab3 | 12389 | |
721956f4 | 12390 | /* Support for grouping stub sections. */ |
6f20ed8a | 12391 | id_sec = htab->sec_info[section->id].u.group->link_sec; |
721956f4 AM |
12392 | |
12393 | /* Get the name of this stub. */ | |
12394 | stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela); | |
12395 | if (!stub_name) | |
12396 | goto error_ret_free_internal; | |
12397 | ||
12398 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, | |
b34976b6 | 12399 | stub_name, FALSE, FALSE); |
721956f4 AM |
12400 | if (stub_entry != NULL) |
12401 | { | |
05d0e962 AM |
12402 | enum ppc_stub_type old_type; |
12403 | /* A stub has already been created, but it may | |
12404 | not be the required type. We shouldn't be | |
12405 | transitioning from plt_call to long_branch | |
12406 | stubs or vice versa, but we might be | |
12407 | upgrading from plt_call to plt_call_r2save or | |
12408 | from long_branch to long_branch_r2off. */ | |
721956f4 | 12409 | free (stub_name); |
05d0e962 AM |
12410 | old_type = stub_entry->stub_type; |
12411 | switch (old_type) | |
12412 | { | |
12413 | default: | |
12414 | abort (); | |
12415 | ||
12416 | case ppc_stub_save_res: | |
12417 | continue; | |
12418 | ||
12419 | case ppc_stub_plt_call: | |
12420 | case ppc_stub_plt_call_r2save: | |
12421 | case ppc_stub_plt_call_notoc: | |
12422 | case ppc_stub_plt_call_both: | |
12423 | if (stub_type == ppc_stub_plt_call) | |
12424 | continue; | |
12425 | else if (stub_type == ppc_stub_plt_call_r2save) | |
12426 | { | |
12427 | if (old_type == ppc_stub_plt_call_notoc) | |
12428 | stub_type = ppc_stub_plt_call_both; | |
12429 | } | |
12430 | else if (stub_type == ppc_stub_plt_call_notoc) | |
12431 | { | |
12432 | if (old_type == ppc_stub_plt_call_r2save) | |
12433 | stub_type = ppc_stub_plt_call_both; | |
12434 | } | |
12435 | else | |
12436 | abort (); | |
12437 | break; | |
12438 | ||
12439 | case ppc_stub_plt_branch: | |
12440 | case ppc_stub_plt_branch_r2off: | |
12441 | case ppc_stub_plt_branch_notoc: | |
12442 | case ppc_stub_plt_branch_both: | |
12443 | old_type += (ppc_stub_long_branch | |
12444 | - ppc_stub_plt_branch); | |
12445 | /* Fall through. */ | |
12446 | case ppc_stub_long_branch: | |
12447 | case ppc_stub_long_branch_r2off: | |
12448 | case ppc_stub_long_branch_notoc: | |
12449 | case ppc_stub_long_branch_both: | |
12450 | if (stub_type == ppc_stub_long_branch) | |
12451 | continue; | |
12452 | else if (stub_type == ppc_stub_long_branch_r2off) | |
12453 | { | |
12454 | if (old_type == ppc_stub_long_branch_notoc) | |
12455 | stub_type = ppc_stub_long_branch_both; | |
12456 | } | |
12457 | else if (stub_type == ppc_stub_long_branch_notoc) | |
12458 | { | |
12459 | if (old_type == ppc_stub_long_branch_r2off) | |
12460 | stub_type = ppc_stub_long_branch_both; | |
12461 | } | |
12462 | else | |
12463 | abort (); | |
12464 | break; | |
12465 | } | |
12466 | if (old_type < stub_type) | |
794e51c0 | 12467 | stub_entry->stub_type = stub_type; |
721956f4 AM |
12468 | continue; |
12469 | } | |
12470 | ||
25f53a85 | 12471 | stub_entry = ppc_add_stub (stub_name, section, info); |
721956f4 AM |
12472 | if (stub_entry == NULL) |
12473 | { | |
12474 | free (stub_name); | |
6cdc0ccc AM |
12475 | error_ret_free_internal: |
12476 | if (elf_section_data (section)->relocs == NULL) | |
12477 | free (internal_relocs); | |
12478 | error_ret_free_local: | |
12479 | if (local_syms != NULL | |
12480 | && (symtab_hdr->contents | |
12481 | != (unsigned char *) local_syms)) | |
12482 | free (local_syms); | |
b34976b6 | 12483 | return FALSE; |
721956f4 AM |
12484 | } |
12485 | ||
ad8e1ba5 | 12486 | stub_entry->stub_type = stub_type; |
05d0e962 AM |
12487 | if (stub_type >= ppc_stub_plt_call |
12488 | && stub_type <= ppc_stub_plt_call_both) | |
e054468f | 12489 | { |
05d0e962 AM |
12490 | stub_entry->target_value = sym_value; |
12491 | stub_entry->target_section = sym_sec; | |
e054468f AM |
12492 | } |
12493 | else | |
12494 | { | |
05d0e962 AM |
12495 | stub_entry->target_value = code_value; |
12496 | stub_entry->target_section = code_sec; | |
e054468f | 12497 | } |
721956f4 | 12498 | stub_entry->h = hash; |
e054468f | 12499 | stub_entry->plt_ent = plt_ent; |
2d7ad24e AM |
12500 | stub_entry->symtype |
12501 | = hash ? hash->elf.type : ELF_ST_TYPE (sym->st_info); | |
6911b7dc | 12502 | stub_entry->other = hash ? hash->elf.other : sym->st_other; |
ee75fd95 | 12503 | |
3d58e1fc AM |
12504 | if (hash != NULL |
12505 | && (hash->elf.root.type == bfd_link_hash_defined | |
12506 | || hash->elf.root.type == bfd_link_hash_defweak)) | |
ee75fd95 | 12507 | htab->stub_globals += 1; |
721956f4 AM |
12508 | } |
12509 | ||
12510 | /* We're done with the internal relocs, free them. */ | |
6cdc0ccc | 12511 | if (elf_section_data (section)->relocs != internal_relocs) |
1e2f5b6e | 12512 | free (internal_relocs); |
721956f4 | 12513 | } |
6cdc0ccc AM |
12514 | |
12515 | if (local_syms != NULL | |
12516 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
12517 | { | |
12518 | if (!info->keep_memory) | |
12519 | free (local_syms); | |
12520 | else | |
12521 | symtab_hdr->contents = (unsigned char *) local_syms; | |
12522 | } | |
721956f4 AM |
12523 | } |
12524 | ||
5c3dead3 | 12525 | /* We may have added some stubs. Find out the new size of the |
721956f4 | 12526 | stub sections. */ |
d4aaa2a0 | 12527 | for (group = htab->group; group != NULL; group = group->next) |
df136d64 AM |
12528 | { |
12529 | group->lr_restore = 0; | |
12530 | group->eh_size = 0; | |
12531 | if (group->stub_sec != NULL) | |
12532 | { | |
12533 | asection *stub_sec = group->stub_sec; | |
12534 | ||
12535 | if (htab->stub_iteration <= STUB_SHRINK_ITER | |
12536 | || stub_sec->rawsize < stub_sec->size) | |
12537 | /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */ | |
12538 | stub_sec->rawsize = stub_sec->size; | |
12539 | stub_sec->size = 0; | |
12540 | stub_sec->reloc_count = 0; | |
12541 | stub_sec->flags &= ~SEC_RELOC; | |
12542 | } | |
12543 | } | |
eea6121a | 12544 | |
ba21f564 AM |
12545 | if (htab->stub_iteration <= STUB_SHRINK_ITER |
12546 | || htab->brlt->rawsize < htab->brlt->size) | |
12547 | htab->brlt->rawsize = htab->brlt->size; | |
eea6121a | 12548 | htab->brlt->size = 0; |
84f5d08e AM |
12549 | htab->brlt->reloc_count = 0; |
12550 | htab->brlt->flags &= ~SEC_RELOC; | |
ee75fd95 | 12551 | if (htab->relbrlt != NULL) |
eea6121a | 12552 | htab->relbrlt->size = 0; |
721956f4 | 12553 | |
63bc6f6c | 12554 | bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info); |
721956f4 | 12555 | |
a4b6fadd AM |
12556 | for (group = htab->group; group != NULL; group = group->next) |
12557 | if (group->needs_save_res) | |
12558 | group->stub_sec->size += htab->sfpr->size; | |
12559 | ||
176a0d42 AM |
12560 | if (info->emitrelocations |
12561 | && htab->glink != NULL && htab->glink->size != 0) | |
12562 | { | |
12563 | htab->glink->reloc_count = 1; | |
12564 | htab->glink->flags |= SEC_RELOC; | |
12565 | } | |
12566 | ||
58d180e8 AM |
12567 | if (htab->glink_eh_frame != NULL |
12568 | && !bfd_is_abs_section (htab->glink_eh_frame->output_section) | |
2d0d44d5 | 12569 | && htab->glink_eh_frame->output_section->size > 8) |
58d180e8 | 12570 | { |
2e0ce1c8 | 12571 | size_t size = 0, align = 4; |
58d180e8 | 12572 | |
d4aaa2a0 | 12573 | for (group = htab->group; group != NULL; group = group->next) |
df136d64 AM |
12574 | if (group->eh_size != 0) |
12575 | size += (group->eh_size + 17 + align - 1) & -align; | |
58d180e8 | 12576 | if (htab->glink != NULL && htab->glink->size != 0) |
2e0ce1c8 | 12577 | size += (24 + align - 1) & -align; |
58d180e8 | 12578 | if (size != 0) |
2e0ce1c8 AM |
12579 | size += (sizeof (glink_eh_frame_cie) + align - 1) & -align; |
12580 | align = 1ul << htab->glink_eh_frame->output_section->alignment_power; | |
12581 | size = (size + align - 1) & -align; | |
58d180e8 AM |
12582 | htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size; |
12583 | htab->glink_eh_frame->size = size; | |
12584 | } | |
12585 | ||
e7d1c40c | 12586 | if (htab->params->plt_stub_align != 0) |
d4aaa2a0 AM |
12587 | for (group = htab->group; group != NULL; group = group->next) |
12588 | if (group->stub_sec != NULL) | |
691d2e9a AM |
12589 | { |
12590 | int align = abs (htab->params->plt_stub_align); | |
12591 | group->stub_sec->size | |
12592 | = (group->stub_sec->size + (1 << align) - 1) & -(1 << align); | |
12593 | } | |
d4aaa2a0 AM |
12594 | |
12595 | for (group = htab->group; group != NULL; group = group->next) | |
12596 | if (group->stub_sec != NULL | |
12597 | && group->stub_sec->rawsize != group->stub_sec->size | |
c9301e31 | 12598 | && (htab->stub_iteration <= STUB_SHRINK_ITER |
d4aaa2a0 | 12599 | || group->stub_sec->rawsize < group->stub_sec->size)) |
5c3dead3 AM |
12600 | break; |
12601 | ||
d4aaa2a0 | 12602 | if (group == NULL |
ba21f564 AM |
12603 | && (htab->brlt->rawsize == htab->brlt->size |
12604 | || (htab->stub_iteration > STUB_SHRINK_ITER | |
12605 | && htab->brlt->rawsize > htab->brlt->size)) | |
58d180e8 AM |
12606 | && (htab->glink_eh_frame == NULL |
12607 | || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size)) | |
5c3dead3 AM |
12608 | break; |
12609 | ||
721956f4 | 12610 | /* Ask the linker to do its stuff. */ |
e7d1c40c | 12611 | (*htab->params->layout_sections_again) (); |
721956f4 AM |
12612 | } |
12613 | ||
da44f4e5 AM |
12614 | if (htab->glink_eh_frame != NULL |
12615 | && htab->glink_eh_frame->size != 0) | |
12616 | { | |
12617 | bfd_vma val; | |
12618 | bfd_byte *p, *last_fde; | |
12619 | size_t last_fde_len, size, align, pad; | |
d4aaa2a0 | 12620 | struct map_stub *group; |
da44f4e5 | 12621 | |
df136d64 AM |
12622 | /* It is necessary to at least have a rough outline of the |
12623 | linker generated CIEs and FDEs written before | |
12624 | bfd_elf_discard_info is run, in order for these FDEs to be | |
12625 | indexed in .eh_frame_hdr. */ | |
da44f4e5 AM |
12626 | p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size); |
12627 | if (p == NULL) | |
12628 | return FALSE; | |
12629 | htab->glink_eh_frame->contents = p; | |
12630 | last_fde = p; | |
2e0ce1c8 | 12631 | align = 4; |
da44f4e5 AM |
12632 | |
12633 | memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); | |
12634 | /* CIE length (rewrite in case little-endian). */ | |
2e0ce1c8 | 12635 | last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4; |
da44f4e5 | 12636 | bfd_put_32 (htab->elf.dynobj, last_fde_len, p); |
2e0ce1c8 | 12637 | p += last_fde_len + 4; |
da44f4e5 | 12638 | |
d4aaa2a0 | 12639 | for (group = htab->group; group != NULL; group = group->next) |
df136d64 | 12640 | if (group->eh_size != 0) |
da44f4e5 | 12641 | { |
df136d64 | 12642 | group->eh_base = p - htab->glink_eh_frame->contents; |
da44f4e5 | 12643 | last_fde = p; |
df136d64 | 12644 | last_fde_len = ((group->eh_size + 17 + align - 1) & -align) - 4; |
da44f4e5 | 12645 | /* FDE length. */ |
2e0ce1c8 | 12646 | bfd_put_32 (htab->elf.dynobj, last_fde_len, p); |
da44f4e5 AM |
12647 | p += 4; |
12648 | /* CIE pointer. */ | |
12649 | val = p - htab->glink_eh_frame->contents; | |
12650 | bfd_put_32 (htab->elf.dynobj, val, p); | |
12651 | p += 4; | |
12652 | /* Offset to stub section, written later. */ | |
12653 | p += 4; | |
12654 | /* stub section size. */ | |
d4aaa2a0 | 12655 | bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p); |
da44f4e5 AM |
12656 | p += 4; |
12657 | /* Augmentation. */ | |
12658 | p += 1; | |
df136d64 AM |
12659 | /* Make sure we don't have all nops. This is enough for |
12660 | elf-eh-frame.c to detect the last non-nop opcode. */ | |
12661 | p[group->eh_size - 1] = DW_CFA_advance_loc + 1; | |
d4aaa2a0 | 12662 | p = last_fde + last_fde_len + 4; |
da44f4e5 AM |
12663 | } |
12664 | if (htab->glink != NULL && htab->glink->size != 0) | |
12665 | { | |
12666 | last_fde = p; | |
2e0ce1c8 | 12667 | last_fde_len = ((24 + align - 1) & -align) - 4; |
da44f4e5 | 12668 | /* FDE length. */ |
2e0ce1c8 | 12669 | bfd_put_32 (htab->elf.dynobj, last_fde_len, p); |
da44f4e5 AM |
12670 | p += 4; |
12671 | /* CIE pointer. */ | |
12672 | val = p - htab->glink_eh_frame->contents; | |
12673 | bfd_put_32 (htab->elf.dynobj, val, p); | |
12674 | p += 4; | |
12675 | /* Offset to .glink, written later. */ | |
12676 | p += 4; | |
12677 | /* .glink size. */ | |
12678 | bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p); | |
12679 | p += 4; | |
12680 | /* Augmentation. */ | |
12681 | p += 1; | |
12682 | ||
12683 | *p++ = DW_CFA_advance_loc + 1; | |
12684 | *p++ = DW_CFA_register; | |
12685 | *p++ = 65; | |
9f08fa5c | 12686 | *p++ = htab->opd_abi ? 12 : 0; |
15a3a14f | 12687 | *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7); |
da44f4e5 AM |
12688 | *p++ = DW_CFA_restore_extended; |
12689 | *p++ = 65; | |
2e0ce1c8 | 12690 | p += ((24 + align - 1) & -align) - 24; |
da44f4e5 AM |
12691 | } |
12692 | /* Subsume any padding into the last FDE if user .eh_frame | |
12693 | sections are aligned more than glink_eh_frame. Otherwise any | |
12694 | zero padding will be seen as a terminator. */ | |
2e0ce1c8 | 12695 | align = 1ul << htab->glink_eh_frame->output_section->alignment_power; |
da44f4e5 | 12696 | size = p - htab->glink_eh_frame->contents; |
2e0ce1c8 | 12697 | pad = ((size + align - 1) & -align) - size; |
da44f4e5 AM |
12698 | htab->glink_eh_frame->size = size + pad; |
12699 | bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde); | |
12700 | } | |
12701 | ||
d969d15f AM |
12702 | maybe_strip_output (info, htab->brlt); |
12703 | if (htab->glink_eh_frame != NULL) | |
12704 | maybe_strip_output (info, htab->glink_eh_frame); | |
721956f4 | 12705 | |
b34976b6 | 12706 | return TRUE; |
721956f4 AM |
12707 | } |
12708 | ||
12709 | /* Called after we have determined section placement. If sections | |
805fc799 | 12710 | move, we'll be called again. Provide a value for TOCstart. */ |
721956f4 | 12711 | |
805fc799 | 12712 | bfd_vma |
1c865ab2 | 12713 | ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd) |
721956f4 | 12714 | { |
805fc799 | 12715 | asection *s; |
a27e685f | 12716 | bfd_vma TOCstart, adjust; |
721956f4 | 12717 | |
43417696 AM |
12718 | if (info != NULL) |
12719 | { | |
12720 | struct elf_link_hash_entry *h; | |
12721 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
12722 | ||
12723 | if (is_elf_hash_table (htab) | |
12724 | && htab->hgot != NULL) | |
12725 | h = htab->hgot; | |
12726 | else | |
12727 | { | |
12728 | h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE); | |
12729 | if (is_elf_hash_table (htab)) | |
12730 | htab->hgot = h; | |
12731 | } | |
12732 | if (h != NULL | |
12733 | && h->root.type == bfd_link_hash_defined | |
12734 | && !h->root.linker_def | |
12735 | && (!is_elf_hash_table (htab) | |
12736 | || h->def_regular)) | |
12737 | { | |
12738 | TOCstart = (h->root.u.def.value - TOC_BASE_OFF | |
12739 | + h->root.u.def.section->output_offset | |
12740 | + h->root.u.def.section->output_section->vma); | |
12741 | _bfd_set_gp_value (obfd, TOCstart); | |
12742 | return TOCstart; | |
12743 | } | |
12744 | } | |
12745 | ||
805fc799 AM |
12746 | /* The TOC consists of sections .got, .toc, .tocbss, .plt in that |
12747 | order. The TOC starts where the first of these sections starts. */ | |
12748 | s = bfd_get_section_by_name (obfd, ".got"); | |
e054468f | 12749 | if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) |
805fc799 | 12750 | s = bfd_get_section_by_name (obfd, ".toc"); |
e054468f | 12751 | if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) |
805fc799 | 12752 | s = bfd_get_section_by_name (obfd, ".tocbss"); |
e054468f | 12753 | if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) |
805fc799 | 12754 | s = bfd_get_section_by_name (obfd, ".plt"); |
e054468f | 12755 | if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) |
805fc799 AM |
12756 | { |
12757 | /* This may happen for | |
12758 | o references to TOC base (SYM@toc / TOC[tc0]) without a | |
12759 | .toc directive | |
12760 | o bad linker script | |
12761 | o --gc-sections and empty TOC sections | |
12762 | ||
12763 | FIXME: Warn user? */ | |
12764 | ||
12765 | /* Look for a likely section. We probably won't even be | |
12766 | using TOCstart. */ | |
12767 | for (s = obfd->sections; s != NULL; s = s->next) | |
e054468f AM |
12768 | if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY |
12769 | | SEC_EXCLUDE)) | |
805fc799 AM |
12770 | == (SEC_ALLOC | SEC_SMALL_DATA)) |
12771 | break; | |
721956f4 | 12772 | if (s == NULL) |
805fc799 | 12773 | for (s = obfd->sections; s != NULL; s = s->next) |
e054468f | 12774 | if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE)) |
805fc799 AM |
12775 | == (SEC_ALLOC | SEC_SMALL_DATA)) |
12776 | break; | |
721956f4 | 12777 | if (s == NULL) |
805fc799 | 12778 | for (s = obfd->sections; s != NULL; s = s->next) |
e054468f AM |
12779 | if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE)) |
12780 | == SEC_ALLOC) | |
805fc799 | 12781 | break; |
721956f4 | 12782 | if (s == NULL) |
805fc799 | 12783 | for (s = obfd->sections; s != NULL; s = s->next) |
e054468f | 12784 | if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC) |
805fc799 AM |
12785 | break; |
12786 | } | |
721956f4 | 12787 | |
805fc799 AM |
12788 | TOCstart = 0; |
12789 | if (s != NULL) | |
12790 | TOCstart = s->output_section->vma + s->output_offset; | |
721956f4 | 12791 | |
a27e685f AM |
12792 | /* Force alignment. */ |
12793 | adjust = TOCstart & (TOC_BASE_ALIGN - 1); | |
12794 | TOCstart -= adjust; | |
1c865ab2 AM |
12795 | _bfd_set_gp_value (obfd, TOCstart); |
12796 | ||
810d4e75 | 12797 | if (info != NULL && s != NULL) |
1c865ab2 AM |
12798 | { |
12799 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
12800 | ||
810d4e75 AM |
12801 | if (htab != NULL) |
12802 | { | |
12803 | if (htab->elf.hgot != NULL) | |
12804 | { | |
a27e685f | 12805 | htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust; |
810d4e75 AM |
12806 | htab->elf.hgot->root.u.def.section = s; |
12807 | } | |
12808 | } | |
12809 | else | |
1c865ab2 | 12810 | { |
810d4e75 AM |
12811 | struct bfd_link_hash_entry *bh = NULL; |
12812 | _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL, | |
a27e685f AM |
12813 | s, TOC_BASE_OFF - adjust, |
12814 | NULL, FALSE, FALSE, &bh); | |
1c865ab2 AM |
12815 | } |
12816 | } | |
805fc799 | 12817 | return TOCstart; |
721956f4 AM |
12818 | } |
12819 | ||
a345bc8d | 12820 | /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to |
49c09209 | 12821 | write out any global entry stubs, and PLT relocations. */ |
a345bc8d AM |
12822 | |
12823 | static bfd_boolean | |
49c09209 | 12824 | build_global_entry_stubs_and_plt (struct elf_link_hash_entry *h, void *inf) |
a345bc8d AM |
12825 | { |
12826 | struct bfd_link_info *info; | |
12827 | struct ppc_link_hash_table *htab; | |
49c09209 | 12828 | struct plt_entry *ent; |
a345bc8d AM |
12829 | asection *s; |
12830 | ||
12831 | if (h->root.type == bfd_link_hash_indirect) | |
12832 | return TRUE; | |
12833 | ||
49c09209 AM |
12834 | info = inf; |
12835 | htab = ppc_hash_table (info); | |
12836 | if (htab == NULL) | |
12837 | return FALSE; | |
12838 | ||
12839 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) | |
12840 | if (ent->plt.offset != (bfd_vma) -1) | |
12841 | { | |
12842 | /* This symbol has an entry in the procedure linkage | |
12843 | table. Set it up. */ | |
12844 | Elf_Internal_Rela rela; | |
2d7ad24e | 12845 | asection *plt, *relplt; |
49c09209 AM |
12846 | bfd_byte *loc; |
12847 | ||
12848 | if (!htab->elf.dynamic_sections_created | |
12849 | || h->dynindx == -1) | |
12850 | { | |
12851 | if (!(h->def_regular | |
12852 | && (h->root.type == bfd_link_hash_defined | |
12853 | || h->root.type == bfd_link_hash_defweak))) | |
12854 | continue; | |
2d7ad24e AM |
12855 | if (h->type == STT_GNU_IFUNC) |
12856 | { | |
12857 | plt = htab->elf.iplt; | |
12858 | relplt = htab->elf.irelplt; | |
12859 | htab->local_ifunc_resolver = 1; | |
12860 | if (htab->opd_abi) | |
12861 | rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL); | |
12862 | else | |
12863 | rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); | |
12864 | } | |
49c09209 | 12865 | else |
2d7ad24e AM |
12866 | { |
12867 | plt = htab->pltlocal; | |
12868 | if (bfd_link_pic (info)) | |
12869 | { | |
12870 | relplt = htab->relpltlocal; | |
12871 | if (htab->opd_abi) | |
12872 | rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_SLOT); | |
12873 | else | |
12874 | rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); | |
12875 | } | |
12876 | else | |
12877 | relplt = NULL; | |
12878 | } | |
49c09209 AM |
12879 | rela.r_addend = (h->root.u.def.value |
12880 | + h->root.u.def.section->output_offset | |
12881 | + h->root.u.def.section->output_section->vma | |
12882 | + ent->addend); | |
2d7ad24e AM |
12883 | |
12884 | if (relplt == NULL) | |
12885 | { | |
12886 | loc = plt->contents + ent->plt.offset; | |
12887 | bfd_put_64 (info->output_bfd, rela.r_addend, loc); | |
12888 | if (htab->opd_abi) | |
12889 | { | |
12890 | bfd_vma toc = elf_gp (info->output_bfd); | |
12891 | toc += htab->sec_info[h->root.u.def.section->id].toc_off; | |
12892 | bfd_put_64 (info->output_bfd, toc, loc + 8); | |
12893 | } | |
12894 | } | |
12895 | else | |
12896 | { | |
12897 | rela.r_offset = (plt->output_section->vma | |
12898 | + plt->output_offset | |
12899 | + ent->plt.offset); | |
12900 | loc = relplt->contents + (relplt->reloc_count++ | |
12901 | * sizeof (Elf64_External_Rela)); | |
12902 | bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc); | |
12903 | } | |
49c09209 AM |
12904 | } |
12905 | else | |
12906 | { | |
12907 | rela.r_offset = (htab->elf.splt->output_section->vma | |
12908 | + htab->elf.splt->output_offset | |
12909 | + ent->plt.offset); | |
12910 | rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT); | |
12911 | rela.r_addend = ent->addend; | |
12912 | loc = (htab->elf.srelplt->contents | |
12913 | + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab)) | |
12914 | / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela))); | |
12915 | if (h->type == STT_GNU_IFUNC && is_static_defined (h)) | |
12916 | htab->maybe_local_ifunc_resolver = 1; | |
2d7ad24e | 12917 | bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc); |
49c09209 | 12918 | } |
49c09209 AM |
12919 | } |
12920 | ||
a345bc8d AM |
12921 | if (!h->pointer_equality_needed) |
12922 | return TRUE; | |
12923 | ||
12924 | if (h->def_regular) | |
12925 | return TRUE; | |
12926 | ||
9e390558 | 12927 | s = htab->global_entry; |
49c09209 AM |
12928 | if (s == NULL || s->size == 0) |
12929 | return TRUE; | |
12930 | ||
12931 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) | |
12932 | if (ent->plt.offset != (bfd_vma) -1 | |
12933 | && ent->addend == 0) | |
a345bc8d AM |
12934 | { |
12935 | bfd_byte *p; | |
12936 | asection *plt; | |
12937 | bfd_vma off; | |
12938 | ||
a345bc8d | 12939 | p = s->contents + h->root.u.def.value; |
33e44f2e | 12940 | plt = htab->elf.splt; |
a345bc8d AM |
12941 | if (!htab->elf.dynamic_sections_created |
12942 | || h->dynindx == -1) | |
2d7ad24e AM |
12943 | { |
12944 | if (h->type == STT_GNU_IFUNC) | |
12945 | plt = htab->elf.iplt; | |
12946 | else | |
12947 | plt = htab->pltlocal; | |
12948 | } | |
49c09209 | 12949 | off = ent->plt.offset + plt->output_offset + plt->output_section->vma; |
a345bc8d AM |
12950 | off -= h->root.u.def.value + s->output_offset + s->output_section->vma; |
12951 | ||
12952 | if (off + 0x80008000 > 0xffffffff || (off & 3) != 0) | |
12953 | { | |
12954 | info->callbacks->einfo | |
c1c8c1ef | 12955 | (_("%P: linkage table error against `%pT'\n"), |
a345bc8d AM |
12956 | h->root.root.string); |
12957 | bfd_set_error (bfd_error_bad_value); | |
12958 | htab->stub_error = TRUE; | |
12959 | } | |
12960 | ||
7341d5e2 AM |
12961 | htab->stub_count[ppc_stub_global_entry - 1] += 1; |
12962 | if (htab->params->emit_stub_syms) | |
12963 | { | |
12964 | size_t len = strlen (h->root.root.string); | |
12965 | char *name = bfd_malloc (sizeof "12345678.global_entry." + len); | |
12966 | ||
12967 | if (name == NULL) | |
12968 | return FALSE; | |
12969 | ||
12970 | sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string); | |
12971 | h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); | |
12972 | if (h == NULL) | |
12973 | return FALSE; | |
12974 | if (h->root.type == bfd_link_hash_new) | |
12975 | { | |
12976 | h->root.type = bfd_link_hash_defined; | |
12977 | h->root.u.def.section = s; | |
12978 | h->root.u.def.value = p - s->contents; | |
12979 | h->ref_regular = 1; | |
12980 | h->def_regular = 1; | |
12981 | h->ref_regular_nonweak = 1; | |
12982 | h->forced_local = 1; | |
12983 | h->non_elf = 0; | |
2ec55de3 | 12984 | h->root.linker_def = 1; |
7341d5e2 AM |
12985 | } |
12986 | } | |
12987 | ||
a345bc8d AM |
12988 | if (PPC_HA (off) != 0) |
12989 | { | |
12990 | bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p); | |
12991 | p += 4; | |
12992 | } | |
12993 | bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p); | |
12994 | p += 4; | |
12995 | bfd_put_32 (s->owner, MTCTR_R12, p); | |
12996 | p += 4; | |
407aa07c | 12997 | bfd_put_32 (s->owner, BCTR, p); |
a345bc8d AM |
12998 | break; |
12999 | } | |
13000 | return TRUE; | |
13001 | } | |
13002 | ||
49c09209 AM |
13003 | /* Write PLT relocs for locals. */ |
13004 | ||
13005 | static bfd_boolean | |
13006 | write_plt_relocs_for_local_syms (struct bfd_link_info *info) | |
13007 | { | |
13008 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
13009 | bfd *ibfd; | |
13010 | ||
13011 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
13012 | { | |
13013 | struct got_entry **lgot_ents, **end_lgot_ents; | |
13014 | struct plt_entry **local_plt, **lplt, **end_local_plt; | |
13015 | Elf_Internal_Shdr *symtab_hdr; | |
13016 | bfd_size_type locsymcount; | |
13017 | Elf_Internal_Sym *local_syms = NULL; | |
13018 | struct plt_entry *ent; | |
13019 | ||
13020 | if (!is_ppc64_elf (ibfd)) | |
13021 | continue; | |
13022 | ||
13023 | lgot_ents = elf_local_got_ents (ibfd); | |
13024 | if (!lgot_ents) | |
13025 | continue; | |
13026 | ||
13027 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
13028 | locsymcount = symtab_hdr->sh_info; | |
13029 | end_lgot_ents = lgot_ents + locsymcount; | |
13030 | local_plt = (struct plt_entry **) end_lgot_ents; | |
13031 | end_local_plt = local_plt + locsymcount; | |
13032 | for (lplt = local_plt; lplt < end_local_plt; ++lplt) | |
13033 | for (ent = *lplt; ent != NULL; ent = ent->next) | |
13034 | if (ent->plt.offset != (bfd_vma) -1) | |
13035 | { | |
13036 | Elf_Internal_Sym *sym; | |
13037 | asection *sym_sec; | |
13038 | asection *plt, *relplt; | |
13039 | bfd_byte *loc; | |
13040 | bfd_vma val; | |
49c09209 AM |
13041 | |
13042 | if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms, | |
13043 | lplt - local_plt, ibfd)) | |
13044 | { | |
13045 | if (local_syms != NULL | |
13046 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
13047 | free (local_syms); | |
13048 | return FALSE; | |
13049 | } | |
13050 | ||
13051 | val = sym->st_value + ent->addend; | |
ba85c15d AM |
13052 | if (ELF_ST_TYPE (sym->st_info) != STT_GNU_IFUNC) |
13053 | val += PPC64_LOCAL_ENTRY_OFFSET (sym->st_other); | |
49c09209 AM |
13054 | if (sym_sec != NULL && sym_sec->output_section != NULL) |
13055 | val += sym_sec->output_offset + sym_sec->output_section->vma; | |
13056 | ||
2d7ad24e AM |
13057 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
13058 | { | |
13059 | htab->local_ifunc_resolver = 1; | |
13060 | plt = htab->elf.iplt; | |
13061 | relplt = htab->elf.irelplt; | |
13062 | } | |
13063 | else | |
13064 | { | |
13065 | plt = htab->pltlocal; | |
13066 | relplt = bfd_link_pic (info) ? htab->relpltlocal : NULL; | |
13067 | } | |
49c09209 | 13068 | |
2d7ad24e AM |
13069 | if (relplt == NULL) |
13070 | { | |
13071 | loc = plt->contents + ent->plt.offset; | |
13072 | bfd_put_64 (info->output_bfd, val, loc); | |
13073 | if (htab->opd_abi) | |
13074 | { | |
13075 | bfd_vma toc = elf_gp (ibfd); | |
13076 | bfd_put_64 (info->output_bfd, toc, loc + 8); | |
13077 | } | |
13078 | } | |
49c09209 | 13079 | else |
2d7ad24e AM |
13080 | { |
13081 | Elf_Internal_Rela rela; | |
13082 | rela.r_offset = (ent->plt.offset | |
13083 | + plt->output_offset | |
13084 | + plt->output_section->vma); | |
13085 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
13086 | { | |
13087 | if (htab->opd_abi) | |
13088 | rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL); | |
13089 | else | |
13090 | rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); | |
13091 | } | |
13092 | else | |
13093 | { | |
13094 | if (htab->opd_abi) | |
13095 | rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_SLOT); | |
13096 | else | |
13097 | rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); | |
13098 | } | |
13099 | rela.r_addend = val; | |
13100 | loc = relplt->contents + (relplt->reloc_count++ | |
13101 | * sizeof (Elf64_External_Rela)); | |
13102 | bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc); | |
13103 | } | |
49c09209 AM |
13104 | } |
13105 | ||
13106 | if (local_syms != NULL | |
13107 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
13108 | { | |
13109 | if (!info->keep_memory) | |
13110 | free (local_syms); | |
13111 | else | |
13112 | symtab_hdr->contents = (unsigned char *) local_syms; | |
13113 | } | |
13114 | } | |
13115 | return TRUE; | |
13116 | } | |
13117 | ||
721956f4 AM |
13118 | /* Build all the stubs associated with the current output file. |
13119 | The stubs are kept in a hash table attached to the main linker | |
13120 | hash table. This function is called via gldelf64ppc_finish. */ | |
13121 | ||
b34976b6 | 13122 | bfd_boolean |
e7d1c40c | 13123 | ppc64_elf_build_stubs (struct bfd_link_info *info, |
4ce794b7 | 13124 | char **stats) |
5d1634d7 AM |
13125 | { |
13126 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
a4b6fadd | 13127 | struct map_stub *group; |
721956f4 | 13128 | asection *stub_sec; |
5d1634d7 | 13129 | bfd_byte *p; |
e717da7e | 13130 | int stub_sec_count = 0; |
5d1634d7 | 13131 | |
4dfe6ac6 NC |
13132 | if (htab == NULL) |
13133 | return FALSE; | |
13134 | ||
eea6121a | 13135 | /* Allocate memory to hold the linker stubs. */ |
d4aaa2a0 | 13136 | for (group = htab->group; group != NULL; group = group->next) |
df136d64 AM |
13137 | { |
13138 | group->eh_size = 0; | |
13139 | group->lr_restore = 0; | |
13140 | if ((stub_sec = group->stub_sec) != NULL | |
13141 | && stub_sec->size != 0) | |
13142 | { | |
13143 | stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, | |
13144 | stub_sec->size); | |
13145 | if (stub_sec->contents == NULL) | |
13146 | return FALSE; | |
13147 | stub_sec->size = 0; | |
13148 | } | |
13149 | } | |
5d1634d7 | 13150 | |
23eb7e01 | 13151 | if (htab->glink != NULL && htab->glink->size != 0) |
5d1634d7 | 13152 | { |
9f951329 | 13153 | unsigned int indx; |
ad8e1ba5 | 13154 | bfd_vma plt0; |
9f951329 | 13155 | |
721956f4 | 13156 | /* Build the .glink plt call stub. */ |
e7d1c40c | 13157 | if (htab->params->emit_stub_syms) |
97b639ba AM |
13158 | { |
13159 | struct elf_link_hash_entry *h; | |
468392fb AM |
13160 | h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", |
13161 | TRUE, FALSE, FALSE); | |
97b639ba AM |
13162 | if (h == NULL) |
13163 | return FALSE; | |
13164 | if (h->root.type == bfd_link_hash_new) | |
13165 | { | |
13166 | h->root.type = bfd_link_hash_defined; | |
13167 | h->root.u.def.section = htab->glink; | |
ee4bf8d2 | 13168 | h->root.u.def.value = 8; |
f5385ebf AM |
13169 | h->ref_regular = 1; |
13170 | h->def_regular = 1; | |
13171 | h->ref_regular_nonweak = 1; | |
13172 | h->forced_local = 1; | |
13173 | h->non_elf = 0; | |
2ec55de3 | 13174 | h->root.linker_def = 1; |
97b639ba AM |
13175 | } |
13176 | } | |
33e44f2e AM |
13177 | plt0 = (htab->elf.splt->output_section->vma |
13178 | + htab->elf.splt->output_offset | |
13179 | - 16); | |
176a0d42 AM |
13180 | if (info->emitrelocations) |
13181 | { | |
13182 | Elf_Internal_Rela *r = get_relocs (htab->glink, 1); | |
13183 | if (r == NULL) | |
13184 | return FALSE; | |
13185 | r->r_offset = (htab->glink->output_offset | |
13186 | + htab->glink->output_section->vma); | |
13187 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL64); | |
13188 | r->r_addend = plt0; | |
13189 | } | |
4ce794b7 | 13190 | p = htab->glink->contents; |
176a0d42 | 13191 | plt0 -= htab->glink->output_section->vma + htab->glink->output_offset; |
ee4bf8d2 AM |
13192 | bfd_put_64 (htab->glink->owner, plt0, p); |
13193 | p += 8; | |
b9e5796b AM |
13194 | if (htab->opd_abi) |
13195 | { | |
13196 | bfd_put_32 (htab->glink->owner, MFLR_R12, p); | |
13197 | p += 4; | |
13198 | bfd_put_32 (htab->glink->owner, BCL_20_31, p); | |
13199 | p += 4; | |
13200 | bfd_put_32 (htab->glink->owner, MFLR_R11, p); | |
13201 | p += 4; | |
13202 | bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p); | |
13203 | p += 4; | |
13204 | bfd_put_32 (htab->glink->owner, MTLR_R12, p); | |
13205 | p += 4; | |
13206 | bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p); | |
13207 | p += 4; | |
13208 | bfd_put_32 (htab->glink->owner, LD_R12_0R11, p); | |
13209 | p += 4; | |
13210 | bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p); | |
13211 | p += 4; | |
13212 | bfd_put_32 (htab->glink->owner, MTCTR_R12, p); | |
13213 | p += 4; | |
13214 | bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p); | |
13215 | p += 4; | |
13216 | } | |
13217 | else | |
13218 | { | |
13219 | bfd_put_32 (htab->glink->owner, MFLR_R0, p); | |
13220 | p += 4; | |
13221 | bfd_put_32 (htab->glink->owner, BCL_20_31, p); | |
13222 | p += 4; | |
13223 | bfd_put_32 (htab->glink->owner, MFLR_R11, p); | |
13224 | p += 4; | |
f378ab09 AM |
13225 | bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p); |
13226 | p += 4; | |
b9e5796b AM |
13227 | bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p); |
13228 | p += 4; | |
13229 | bfd_put_32 (htab->glink->owner, MTLR_R0, p); | |
13230 | p += 4; | |
13231 | bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p); | |
13232 | p += 4; | |
13233 | bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p); | |
13234 | p += 4; | |
13235 | bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p); | |
13236 | p += 4; | |
13237 | bfd_put_32 (htab->glink->owner, LD_R12_0R11, p); | |
13238 | p += 4; | |
13239 | bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p); | |
13240 | p += 4; | |
13241 | bfd_put_32 (htab->glink->owner, MTCTR_R12, p); | |
13242 | p += 4; | |
13243 | bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p); | |
13244 | p += 4; | |
13245 | } | |
407aa07c AM |
13246 | bfd_put_32 (htab->glink->owner, BCTR, p); |
13247 | p += 4; | |
c75bc4f7 | 13248 | BFD_ASSERT (p == htab->glink->contents + GLINK_PLTRESOLVE_SIZE (htab)); |
ad8e1ba5 | 13249 | |
9f951329 AM |
13250 | /* Build the .glink lazy link call stubs. */ |
13251 | indx = 0; | |
9e390558 | 13252 | while (p < htab->glink->contents + htab->glink->size) |
9f951329 | 13253 | { |
b9e5796b | 13254 | if (htab->opd_abi) |
9f951329 | 13255 | { |
b9e5796b AM |
13256 | if (indx < 0x8000) |
13257 | { | |
13258 | bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p); | |
13259 | p += 4; | |
13260 | } | |
13261 | else | |
13262 | { | |
13263 | bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p); | |
13264 | p += 4; | |
13265 | bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), | |
13266 | p); | |
13267 | p += 4; | |
13268 | } | |
9f951329 | 13269 | } |
4ce794b7 | 13270 | bfd_put_32 (htab->glink->owner, |
ee4bf8d2 | 13271 | B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p); |
a16d5acb | 13272 | indx++; |
9f951329 AM |
13273 | p += 4; |
13274 | } | |
5d1634d7 | 13275 | } |
5d1634d7 | 13276 | |
49c09209 AM |
13277 | /* Build .glink global entry stubs, and PLT relocs for globals. */ |
13278 | elf_link_hash_traverse (&htab->elf, build_global_entry_stubs_and_plt, info); | |
13279 | ||
13280 | if (!write_plt_relocs_for_local_syms (info)) | |
13281 | return FALSE; | |
9e390558 | 13282 | |
7341d5e2 | 13283 | if (htab->brlt != NULL && htab->brlt->size != 0) |
721956f4 | 13284 | { |
4ce794b7 | 13285 | htab->brlt->contents = bfd_zalloc (htab->brlt->owner, |
eea6121a | 13286 | htab->brlt->size); |
4ce794b7 | 13287 | if (htab->brlt->contents == NULL) |
b34976b6 | 13288 | return FALSE; |
721956f4 | 13289 | } |
ee75fd95 | 13290 | if (htab->relbrlt != NULL && htab->relbrlt->size != 0) |
63bc6f6c AM |
13291 | { |
13292 | htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner, | |
eea6121a | 13293 | htab->relbrlt->size); |
63bc6f6c AM |
13294 | if (htab->relbrlt->contents == NULL) |
13295 | return FALSE; | |
13296 | } | |
5d1634d7 | 13297 | |
721956f4 AM |
13298 | /* Build the stubs as directed by the stub hash table. */ |
13299 | bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info); | |
5d1634d7 | 13300 | |
a4b6fadd AM |
13301 | for (group = htab->group; group != NULL; group = group->next) |
13302 | if (group->needs_save_res) | |
7dda8d3c | 13303 | group->stub_sec->size += htab->sfpr->size; |
a4b6fadd | 13304 | |
aa8a7074 AM |
13305 | if (htab->relbrlt != NULL) |
13306 | htab->relbrlt->reloc_count = 0; | |
13307 | ||
e7d1c40c | 13308 | if (htab->params->plt_stub_align != 0) |
d4aaa2a0 AM |
13309 | for (group = htab->group; group != NULL; group = group->next) |
13310 | if ((stub_sec = group->stub_sec) != NULL) | |
691d2e9a AM |
13311 | { |
13312 | int align = abs (htab->params->plt_stub_align); | |
13313 | stub_sec->size = (stub_sec->size + (1 << align) - 1) & -(1 << align); | |
13314 | } | |
794e51c0 | 13315 | |
7dda8d3c AM |
13316 | for (group = htab->group; group != NULL; group = group->next) |
13317 | if (group->needs_save_res) | |
13318 | { | |
13319 | stub_sec = group->stub_sec; | |
13320 | memcpy (stub_sec->contents + stub_sec->size - htab->sfpr->size, | |
13321 | htab->sfpr->contents, htab->sfpr->size); | |
13322 | if (htab->params->emit_stub_syms) | |
13323 | { | |
13324 | unsigned int i; | |
13325 | ||
13326 | for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++) | |
13327 | if (!sfpr_define (info, &save_res_funcs[i], stub_sec)) | |
13328 | return FALSE; | |
13329 | } | |
13330 | } | |
13331 | ||
df136d64 AM |
13332 | if (htab->glink_eh_frame != NULL |
13333 | && htab->glink_eh_frame->size != 0) | |
13334 | { | |
13335 | bfd_vma val; | |
13336 | size_t align = 4; | |
13337 | ||
13338 | p = htab->glink_eh_frame->contents; | |
13339 | p += (sizeof (glink_eh_frame_cie) + align - 1) & -align; | |
13340 | ||
13341 | for (group = htab->group; group != NULL; group = group->next) | |
13342 | if (group->eh_size != 0) | |
13343 | { | |
13344 | /* Offset to stub section. */ | |
13345 | val = (group->stub_sec->output_section->vma | |
13346 | + group->stub_sec->output_offset); | |
13347 | val -= (htab->glink_eh_frame->output_section->vma | |
13348 | + htab->glink_eh_frame->output_offset | |
13349 | + (p + 8 - htab->glink_eh_frame->contents)); | |
13350 | if (val + 0x80000000 > 0xffffffff) | |
13351 | { | |
13352 | _bfd_error_handler | |
13353 | (_("%s offset too large for .eh_frame sdata4 encoding"), | |
13354 | group->stub_sec->name); | |
13355 | return FALSE; | |
13356 | } | |
13357 | bfd_put_32 (htab->elf.dynobj, val, p + 8); | |
13358 | p += (group->eh_size + 17 + 3) & -4; | |
13359 | } | |
13360 | if (htab->glink != NULL && htab->glink->size != 0) | |
13361 | { | |
13362 | /* Offset to .glink. */ | |
13363 | val = (htab->glink->output_section->vma | |
13364 | + htab->glink->output_offset | |
13365 | + 8); | |
13366 | val -= (htab->glink_eh_frame->output_section->vma | |
13367 | + htab->glink_eh_frame->output_offset | |
13368 | + (p + 8 - htab->glink_eh_frame->contents)); | |
13369 | if (val + 0x80000000 > 0xffffffff) | |
13370 | { | |
13371 | _bfd_error_handler | |
13372 | (_("%s offset too large for .eh_frame sdata4 encoding"), | |
13373 | htab->glink->name); | |
13374 | return FALSE; | |
13375 | } | |
13376 | bfd_put_32 (htab->elf.dynobj, val, p + 8); | |
13377 | p += (24 + align - 1) & -align; | |
13378 | } | |
13379 | } | |
13380 | ||
d4aaa2a0 AM |
13381 | for (group = htab->group; group != NULL; group = group->next) |
13382 | if ((stub_sec = group->stub_sec) != NULL) | |
e717da7e AM |
13383 | { |
13384 | stub_sec_count += 1; | |
c9301e31 AM |
13385 | if (stub_sec->rawsize != stub_sec->size |
13386 | && (htab->stub_iteration <= STUB_SHRINK_ITER | |
13387 | || stub_sec->rawsize < stub_sec->size)) | |
e717da7e AM |
13388 | break; |
13389 | } | |
5d1634d7 | 13390 | |
25516cc5 | 13391 | if (group != NULL) |
5d1634d7 | 13392 | { |
b34976b6 | 13393 | htab->stub_error = TRUE; |
cf97bcb0 | 13394 | _bfd_error_handler (_("stubs don't match calculated size")); |
5d1634d7 | 13395 | } |
721956f4 | 13396 | |
d2a300cf AM |
13397 | if (htab->stub_error) |
13398 | return FALSE; | |
13399 | ||
13400 | if (stats != NULL) | |
13401 | { | |
db84fff3 | 13402 | size_t len; |
d2a300cf AM |
13403 | *stats = bfd_malloc (500); |
13404 | if (*stats == NULL) | |
13405 | return FALSE; | |
13406 | ||
db84fff3 AM |
13407 | len = sprintf (*stats, |
13408 | ngettext ("linker stubs in %u group\n", | |
13409 | "linker stubs in %u groups\n", | |
13410 | stub_sec_count), | |
13411 | stub_sec_count); | |
05d0e962 AM |
13412 | sprintf (*stats + len, _(" branch %lu\n" |
13413 | " branch toc adj %lu\n" | |
13414 | " branch notoc %lu\n" | |
13415 | " branch both %lu\n" | |
13416 | " long branch %lu\n" | |
13417 | " long toc adj %lu\n" | |
13418 | " long notoc %lu\n" | |
13419 | " long both %lu\n" | |
13420 | " plt call %lu\n" | |
13421 | " plt call save %lu\n" | |
13422 | " plt call notoc %lu\n" | |
13423 | " plt call both %lu\n" | |
13424 | " global entry %lu"), | |
4ce794b7 AM |
13425 | htab->stub_count[ppc_stub_long_branch - 1], |
13426 | htab->stub_count[ppc_stub_long_branch_r2off - 1], | |
05d0e962 AM |
13427 | htab->stub_count[ppc_stub_long_branch_notoc - 1], |
13428 | htab->stub_count[ppc_stub_long_branch_both - 1], | |
4ce794b7 AM |
13429 | htab->stub_count[ppc_stub_plt_branch - 1], |
13430 | htab->stub_count[ppc_stub_plt_branch_r2off - 1], | |
05d0e962 AM |
13431 | htab->stub_count[ppc_stub_plt_branch_notoc - 1], |
13432 | htab->stub_count[ppc_stub_plt_branch_both - 1], | |
794e51c0 | 13433 | htab->stub_count[ppc_stub_plt_call - 1], |
7341d5e2 | 13434 | htab->stub_count[ppc_stub_plt_call_r2save - 1], |
05d0e962 AM |
13435 | htab->stub_count[ppc_stub_plt_call_notoc - 1], |
13436 | htab->stub_count[ppc_stub_plt_call_both - 1], | |
7341d5e2 | 13437 | htab->stub_count[ppc_stub_global_entry - 1]); |
d2a300cf AM |
13438 | } |
13439 | return TRUE; | |
5bd4f169 AM |
13440 | } |
13441 | ||
60124e18 AM |
13442 | /* What to do when ld finds relocations against symbols defined in |
13443 | discarded sections. */ | |
13444 | ||
13445 | static unsigned int | |
13446 | ppc64_elf_action_discarded (asection *sec) | |
13447 | { | |
13448 | if (strcmp (".opd", sec->name) == 0) | |
13449 | return 0; | |
13450 | ||
13451 | if (strcmp (".toc", sec->name) == 0) | |
13452 | return 0; | |
13453 | ||
bce50a28 JJ |
13454 | if (strcmp (".toc1", sec->name) == 0) |
13455 | return 0; | |
13456 | ||
60124e18 AM |
13457 | return _bfd_elf_default_action_discarded (sec); |
13458 | } | |
13459 | ||
5bd4f169 AM |
13460 | /* The RELOCATE_SECTION function is called by the ELF backend linker |
13461 | to handle the relocations for a section. | |
13462 | ||
13463 | The relocs are always passed as Rela structures; if the section | |
13464 | actually uses Rel structures, the r_addend field will always be | |
13465 | zero. | |
13466 | ||
13467 | This function is responsible for adjust the section contents as | |
13468 | necessary, and (if using Rela relocs and generating a | |
1049f94e | 13469 | relocatable output file) adjusting the reloc addend as |
5bd4f169 AM |
13470 | necessary. |
13471 | ||
13472 | This function does not have to worry about setting the reloc | |
13473 | address or the reloc symbol index. | |
13474 | ||
13475 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
13476 | ||
13477 | LOCAL_SECTIONS is an array giving the section in the input file | |
13478 | corresponding to the st_shndx field of each local symbol. | |
13479 | ||
13480 | The global hash table entry for the global symbols can be found | |
13481 | via elf_sym_hashes (input_bfd). | |
13482 | ||
1049f94e | 13483 | When generating relocatable output, this function must handle |
5bd4f169 AM |
13484 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
13485 | going to be the section symbol corresponding to the output | |
13486 | section, which means that the addend must be adjusted | |
13487 | accordingly. */ | |
13488 | ||
b34976b6 | 13489 | static bfd_boolean |
4ce794b7 AM |
13490 | ppc64_elf_relocate_section (bfd *output_bfd, |
13491 | struct bfd_link_info *info, | |
13492 | bfd *input_bfd, | |
13493 | asection *input_section, | |
13494 | bfd_byte *contents, | |
13495 | Elf_Internal_Rela *relocs, | |
13496 | Elf_Internal_Sym *local_syms, | |
13497 | asection **local_sections) | |
5bd4f169 | 13498 | { |
65f38f15 | 13499 | struct ppc_link_hash_table *htab; |
5bd4f169 AM |
13500 | Elf_Internal_Shdr *symtab_hdr; |
13501 | struct elf_link_hash_entry **sym_hashes; | |
5bd4f169 | 13502 | Elf_Internal_Rela *rel; |
c316a17c | 13503 | Elf_Internal_Rela *wrel; |
5bd4f169 | 13504 | Elf_Internal_Rela *relend; |
411e1bfb AM |
13505 | Elf_Internal_Rela outrel; |
13506 | bfd_byte *loc; | |
411e1bfb | 13507 | struct got_entry **local_got_ents; |
5bd4f169 | 13508 | bfd_vma TOCstart; |
b34976b6 AM |
13509 | bfd_boolean ret = TRUE; |
13510 | bfd_boolean is_opd; | |
794e51c0 AM |
13511 | /* Assume 'at' branch hints. */ |
13512 | bfd_boolean is_isa_v2 = TRUE; | |
95f0d0d2 | 13513 | bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0); |
5bd4f169 | 13514 | |
65f38f15 | 13515 | /* Initialize howto table if needed. */ |
5bd4f169 | 13516 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
5bd4f169 AM |
13517 | ppc_howto_init (); |
13518 | ||
65f38f15 | 13519 | htab = ppc_hash_table (info); |
4dfe6ac6 NC |
13520 | if (htab == NULL) |
13521 | return FALSE; | |
ee75fd95 AM |
13522 | |
13523 | /* Don't relocate stub sections. */ | |
e7d1c40c | 13524 | if (input_section->owner == htab->params->stub_bfd) |
ee75fd95 AM |
13525 | return TRUE; |
13526 | ||
7af5d5c4 AM |
13527 | if (!is_ppc64_elf (input_bfd)) |
13528 | { | |
13529 | bfd_set_error (bfd_error_wrong_format); | |
13530 | return FALSE; | |
13531 | } | |
0ffa91dd | 13532 | |
411e1bfb | 13533 | local_got_ents = elf_local_got_ents (input_bfd); |
5bd4f169 | 13534 | TOCstart = elf_gp (output_bfd); |
0ffa91dd | 13535 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
5bd4f169 | 13536 | sym_hashes = elf_sym_hashes (input_bfd); |
7c8fe5c4 | 13537 | is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd; |
65f38f15 | 13538 | |
c316a17c | 13539 | rel = wrel = relocs; |
5bd4f169 | 13540 | relend = relocs + input_section->reloc_count; |
c316a17c | 13541 | for (; rel < relend; wrel++, rel++) |
5bd4f169 | 13542 | { |
04c9666a | 13543 | enum elf_ppc64_reloc_type r_type; |
31c76678 | 13544 | bfd_vma addend; |
5bd4f169 AM |
13545 | bfd_reloc_status_type r; |
13546 | Elf_Internal_Sym *sym; | |
13547 | asection *sec; | |
039b3fef AM |
13548 | struct elf_link_hash_entry *h_elf; |
13549 | struct ppc_link_hash_entry *h; | |
13550 | struct ppc_link_hash_entry *fdh; | |
5bd4f169 | 13551 | const char *sym_name; |
0d4792f7 | 13552 | unsigned long r_symndx, toc_symndx; |
3a71aa26 | 13553 | bfd_vma toc_addend; |
f961d9dd AM |
13554 | unsigned char tls_mask, tls_gd, tls_type; |
13555 | unsigned char sym_type; | |
5bd4f169 | 13556 | bfd_vma relocation; |
23cedd1d | 13557 | bfd_boolean unresolved_reloc, save_unresolved_reloc; |
b34976b6 | 13558 | bfd_boolean warned; |
bc30df16 | 13559 | enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest; |
67f0cbdb | 13560 | unsigned int insn; |
e11840f9 | 13561 | unsigned int mask; |
721956f4 AM |
13562 | struct ppc_stub_hash_entry *stub_entry; |
13563 | bfd_vma max_br_offset; | |
13564 | bfd_vma from; | |
c316a17c | 13565 | Elf_Internal_Rela orig_rel; |
b80eed39 AM |
13566 | reloc_howto_type *howto; |
13567 | struct reloc_howto_struct alt_howto; | |
5bd4f169 | 13568 | |
c316a17c AM |
13569 | again: |
13570 | orig_rel = *rel; | |
13571 | ||
4ce794b7 | 13572 | r_type = ELF64_R_TYPE (rel->r_info); |
5bd4f169 | 13573 | r_symndx = ELF64_R_SYM (rel->r_info); |
ee87f2da AM |
13574 | |
13575 | /* For old style R_PPC64_TOC relocs with a zero symbol, use the | |
13576 | symbol of the previous ADDR64 reloc. The symbol gives us the | |
13577 | proper TOC base to use. */ | |
13578 | if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC) | |
c316a17c AM |
13579 | && wrel != relocs |
13580 | && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64 | |
ee87f2da | 13581 | && is_opd) |
c316a17c | 13582 | r_symndx = ELF64_R_SYM (wrel[-1].r_info); |
ee87f2da | 13583 | |
4ce794b7 AM |
13584 | sym = NULL; |
13585 | sec = NULL; | |
039b3fef | 13586 | h_elf = NULL; |
4ce794b7 | 13587 | sym_name = NULL; |
b34976b6 AM |
13588 | unresolved_reloc = FALSE; |
13589 | warned = FALSE; | |
65f38f15 | 13590 | |
0b13192e | 13591 | if (r_symndx < symtab_hdr->sh_info) |
5bd4f169 AM |
13592 | { |
13593 | /* It's a local symbol. */ | |
74f0fb50 | 13594 | struct _opd_sec_data *opd; |
4025353c | 13595 | |
5bd4f169 AM |
13596 | sym = local_syms + r_symndx; |
13597 | sec = local_sections[r_symndx]; | |
26c61ae5 | 13598 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); |
0d4792f7 | 13599 | sym_type = ELF64_ST_TYPE (sym->st_info); |
8517fae7 | 13600 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
74f0fb50 AM |
13601 | opd = get_opd_info (sec); |
13602 | if (opd != NULL && opd->adjust != NULL) | |
1e2f5b6e | 13603 | { |
51aecdc5 AM |
13604 | long adjust = opd->adjust[OPD_NDX (sym->st_value |
13605 | + rel->r_addend)]; | |
4025353c AM |
13606 | if (adjust == -1) |
13607 | relocation = 0; | |
13608 | else | |
4cc603a5 AM |
13609 | { |
13610 | /* If this is a relocation against the opd section sym | |
13611 | and we have edited .opd, adjust the reloc addend so | |
13612 | that ld -r and ld --emit-relocs output is correct. | |
13613 | If it is a reloc against some other .opd symbol, | |
13614 | then the symbol value will be adjusted later. */ | |
13615 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
13616 | rel->r_addend += adjust; | |
13617 | else | |
13618 | relocation += adjust; | |
13619 | } | |
1e2f5b6e | 13620 | } |
5bd4f169 AM |
13621 | } |
13622 | else | |
13623 | { | |
62d887d4 L |
13624 | bfd_boolean ignored; |
13625 | ||
b2a8e766 AM |
13626 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
13627 | r_symndx, symtab_hdr, sym_hashes, | |
039b3fef | 13628 | h_elf, sec, relocation, |
62d887d4 | 13629 | unresolved_reloc, warned, ignored); |
039b3fef AM |
13630 | sym_name = h_elf->root.root.string; |
13631 | sym_type = h_elf->type; | |
b69fdb4e AM |
13632 | if (sec != NULL |
13633 | && sec->owner == output_bfd | |
13634 | && strcmp (sec->name, ".opd") == 0) | |
13635 | { | |
13636 | /* This is a symbol defined in a linker script. All | |
13637 | such are defined in output sections, even those | |
13638 | defined by simple assignment from a symbol defined in | |
13639 | an input section. Transfer the symbol to an | |
13640 | appropriate input .opd section, so that a branch to | |
13641 | this symbol will be mapped to the location specified | |
13642 | by the opd entry. */ | |
13643 | struct bfd_link_order *lo; | |
13644 | for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next) | |
13645 | if (lo->type == bfd_indirect_link_order) | |
13646 | { | |
13647 | asection *isec = lo->u.indirect.section; | |
13648 | if (h_elf->root.u.def.value >= isec->output_offset | |
13649 | && h_elf->root.u.def.value < (isec->output_offset | |
13650 | + isec->size)) | |
13651 | { | |
13652 | h_elf->root.u.def.value -= isec->output_offset; | |
13653 | h_elf->root.u.def.section = isec; | |
13654 | sec = isec; | |
13655 | break; | |
13656 | } | |
13657 | } | |
13658 | } | |
5bd4f169 | 13659 | } |
039b3fef | 13660 | h = (struct ppc_link_hash_entry *) h_elf; |
5bd4f169 | 13661 | |
dbaa2011 | 13662 | if (sec != NULL && discarded_section (sec)) |
c316a17c AM |
13663 | { |
13664 | _bfd_clear_contents (ppc64_elf_howto_table[r_type], | |
13665 | input_bfd, input_section, | |
0930cb30 | 13666 | contents, rel->r_offset); |
c316a17c AM |
13667 | wrel->r_offset = rel->r_offset; |
13668 | wrel->r_info = 0; | |
13669 | wrel->r_addend = 0; | |
13670 | ||
13671 | /* For ld -r, remove relocations in debug sections against | |
dcd2b8a0 | 13672 | symbols defined in discarded sections. Not done for |
c316a17c AM |
13673 | non-debug to preserve relocs in .eh_frame which the |
13674 | eh_frame editing code expects to be present. */ | |
13675 | if (bfd_link_relocatable (info) | |
13676 | && (input_section->flags & SEC_DEBUGGING)) | |
13677 | wrel--; | |
13678 | ||
13679 | continue; | |
13680 | } | |
ab96bf03 | 13681 | |
0e1862bb | 13682 | if (bfd_link_relocatable (info)) |
c316a17c | 13683 | goto copy_reloc; |
ab96bf03 | 13684 | |
f40da81b AM |
13685 | if (h != NULL && &h->elf == htab->elf.hgot) |
13686 | { | |
6f20ed8a | 13687 | relocation = TOCstart + htab->sec_info[input_section->id].toc_off; |
f40da81b AM |
13688 | sec = bfd_abs_section_ptr; |
13689 | unresolved_reloc = FALSE; | |
13690 | } | |
13691 | ||
951fd09b AM |
13692 | /* TLS optimizations. Replace instruction sequences and relocs |
13693 | based on information we collected in tls_optimize. We edit | |
13694 | RELOCS so that --emit-relocs will output something sensible | |
13695 | for the final instruction stream. */ | |
13696 | tls_mask = 0; | |
13697 | tls_gd = 0; | |
0d4792f7 | 13698 | toc_symndx = 0; |
727fc41e AM |
13699 | if (h != NULL) |
13700 | tls_mask = h->tls_mask; | |
13701 | else if (local_got_ents != NULL) | |
411e1bfb | 13702 | { |
e054468f AM |
13703 | struct plt_entry **local_plt = (struct plt_entry **) |
13704 | (local_got_ents + symtab_hdr->sh_info); | |
f961d9dd | 13705 | unsigned char *lgot_masks = (unsigned char *) |
e054468f | 13706 | (local_plt + symtab_hdr->sh_info); |
727fc41e AM |
13707 | tls_mask = lgot_masks[r_symndx]; |
13708 | } | |
37da22e5 | 13709 | if (((tls_mask & TLS_TLS) == 0 || tls_mask == (TLS_TLS | TLS_MARK)) |
727fc41e AM |
13710 | && (r_type == R_PPC64_TLS |
13711 | || r_type == R_PPC64_TLSGD | |
13712 | || r_type == R_PPC64_TLSLD)) | |
13713 | { | |
13714 | /* Check for toc tls entries. */ | |
f961d9dd | 13715 | unsigned char *toc_tls; |
0d4792f7 | 13716 | |
727fc41e AM |
13717 | if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend, |
13718 | &local_syms, rel, input_bfd)) | |
13719 | return FALSE; | |
0d4792f7 | 13720 | |
727fc41e AM |
13721 | if (toc_tls) |
13722 | tls_mask = *toc_tls; | |
0d4792f7 AM |
13723 | } |
13724 | ||
13725 | /* Check that tls relocs are used with tls syms, and non-tls | |
13726 | relocs are used with non-tls syms. */ | |
cf35638d | 13727 | if (r_symndx != STN_UNDEF |
0d4792f7 AM |
13728 | && r_type != R_PPC64_NONE |
13729 | && (h == NULL | |
039b3fef AM |
13730 | || h->elf.root.type == bfd_link_hash_defined |
13731 | || h->elf.root.type == bfd_link_hash_defweak) | |
1d483afe AM |
13732 | && (IS_PPC64_TLS_RELOC (r_type) |
13733 | != (sym_type == STT_TLS | |
13734 | || (sym_type == STT_SECTION | |
13735 | && (sec->flags & SEC_THREAD_LOCAL) != 0)))) | |
0d4792f7 | 13736 | { |
37da22e5 | 13737 | if ((tls_mask & TLS_TLS) != 0 |
727fc41e AM |
13738 | && (r_type == R_PPC64_TLS |
13739 | || r_type == R_PPC64_TLSGD | |
13740 | || r_type == R_PPC64_TLSLD)) | |
0d4792f7 AM |
13741 | /* R_PPC64_TLS is OK against a symbol in the TOC. */ |
13742 | ; | |
13743 | else | |
25f53a85 | 13744 | info->callbacks->einfo |
1d483afe | 13745 | (!IS_PPC64_TLS_RELOC (r_type) |
695344c0 | 13746 | /* xgettext:c-format */ |
c1c8c1ef | 13747 | ? _("%H: %s used with TLS symbol `%pT'\n") |
695344c0 | 13748 | /* xgettext:c-format */ |
c1c8c1ef | 13749 | : _("%H: %s used with non-TLS symbol `%pT'\n"), |
25f53a85 | 13750 | input_bfd, input_section, rel->r_offset, |
0d4792f7 AM |
13751 | ppc64_elf_howto_table[r_type]->name, |
13752 | sym_name); | |
411e1bfb AM |
13753 | } |
13754 | ||
13755 | /* Ensure reloc mapping code below stays sane. */ | |
13756 | if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1 | |
13757 | || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1 | |
13758 | || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3) | |
13759 | || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3) | |
13760 | || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3) | |
13761 | || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3) | |
13762 | || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3) | |
13763 | || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3) | |
13764 | || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3) | |
13765 | || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3)) | |
13766 | abort (); | |
0d4792f7 | 13767 | |
411e1bfb AM |
13768 | switch (r_type) |
13769 | { | |
13770 | default: | |
411e1bfb AM |
13771 | break; |
13772 | ||
ba761f19 | 13773 | case R_PPC64_LO_DS_OPT: |
95f0d0d2 | 13774 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset); |
ba761f19 AM |
13775 | if ((insn & (0x3f << 26)) != 58u << 26) |
13776 | abort (); | |
13777 | insn += (14u << 26) - (58u << 26); | |
95f0d0d2 | 13778 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset); |
ba761f19 AM |
13779 | r_type = R_PPC64_TOC16_LO; |
13780 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
13781 | break; | |
13782 | ||
411e1bfb AM |
13783 | case R_PPC64_TOC16: |
13784 | case R_PPC64_TOC16_LO: | |
13785 | case R_PPC64_TOC16_DS: | |
13786 | case R_PPC64_TOC16_LO_DS: | |
411e1bfb AM |
13787 | { |
13788 | /* Check for toc tls entries. */ | |
f961d9dd | 13789 | unsigned char *toc_tls; |
951fd09b | 13790 | int retval; |
411e1bfb | 13791 | |
3a71aa26 AM |
13792 | retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend, |
13793 | &local_syms, rel, input_bfd); | |
951fd09b | 13794 | if (retval == 0) |
411e1bfb AM |
13795 | return FALSE; |
13796 | ||
13797 | if (toc_tls) | |
13798 | { | |
951fd09b | 13799 | tls_mask = *toc_tls; |
411e1bfb AM |
13800 | if (r_type == R_PPC64_TOC16_DS |
13801 | || r_type == R_PPC64_TOC16_LO_DS) | |
81407a69 | 13802 | { |
37da22e5 | 13803 | if ((tls_mask & TLS_TLS) != 0 |
81407a69 AM |
13804 | && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0) |
13805 | goto toctprel; | |
13806 | } | |
411e1bfb | 13807 | else |
951fd09b AM |
13808 | { |
13809 | /* If we found a GD reloc pair, then we might be | |
13810 | doing a GD->IE transition. */ | |
13811 | if (retval == 2) | |
13812 | { | |
13813 | tls_gd = TLS_TPRELGD; | |
37da22e5 AM |
13814 | if ((tls_mask & TLS_TLS) != 0 |
13815 | && (tls_mask & TLS_GD) == 0) | |
102890f0 | 13816 | goto tls_ldgd_opt; |
951fd09b AM |
13817 | } |
13818 | else if (retval == 3) | |
13819 | { | |
37da22e5 AM |
13820 | if ((tls_mask & TLS_TLS) != 0 |
13821 | && (tls_mask & TLS_LD) == 0) | |
102890f0 | 13822 | goto tls_ldgd_opt; |
951fd09b AM |
13823 | } |
13824 | } | |
411e1bfb AM |
13825 | } |
13826 | } | |
13827 | break; | |
13828 | ||
9d6ded02 AM |
13829 | case R_PPC64_GOT_TPREL16_HI: |
13830 | case R_PPC64_GOT_TPREL16_HA: | |
37da22e5 | 13831 | if ((tls_mask & TLS_TLS) != 0 |
9d6ded02 AM |
13832 | && (tls_mask & TLS_TPREL) == 0) |
13833 | { | |
13834 | rel->r_offset -= d_offset; | |
95f0d0d2 | 13835 | bfd_put_32 (input_bfd, NOP, contents + rel->r_offset); |
9d6ded02 AM |
13836 | r_type = R_PPC64_NONE; |
13837 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
13838 | } | |
13839 | break; | |
13840 | ||
411e1bfb AM |
13841 | case R_PPC64_GOT_TPREL16_DS: |
13842 | case R_PPC64_GOT_TPREL16_LO_DS: | |
37da22e5 | 13843 | if ((tls_mask & TLS_TLS) != 0 |
951fd09b | 13844 | && (tls_mask & TLS_TPREL) == 0) |
411e1bfb | 13845 | { |
81407a69 | 13846 | toctprel: |
95f0d0d2 | 13847 | insn = bfd_get_32 (input_bfd, |
c316a17c | 13848 | contents + rel->r_offset - d_offset); |
411e1bfb AM |
13849 | insn &= 31 << 21; |
13850 | insn |= 0x3c0d0000; /* addis 0,13,0 */ | |
95f0d0d2 | 13851 | bfd_put_32 (input_bfd, insn, |
c316a17c | 13852 | contents + rel->r_offset - d_offset); |
411e1bfb | 13853 | r_type = R_PPC64_TPREL16_HA; |
0d4792f7 AM |
13854 | if (toc_symndx != 0) |
13855 | { | |
13856 | rel->r_info = ELF64_R_INFO (toc_symndx, r_type); | |
3a71aa26 | 13857 | rel->r_addend = toc_addend; |
0d4792f7 AM |
13858 | /* We changed the symbol. Start over in order to |
13859 | get h, sym, sec etc. right. */ | |
c316a17c | 13860 | goto again; |
0d4792f7 AM |
13861 | } |
13862 | else | |
13863 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
411e1bfb AM |
13864 | } |
13865 | break; | |
13866 | ||
13867 | case R_PPC64_TLS: | |
37da22e5 | 13868 | if ((tls_mask & TLS_TLS) != 0 |
951fd09b | 13869 | && (tls_mask & TLS_TPREL) == 0) |
411e1bfb | 13870 | { |
95f0d0d2 | 13871 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
2d0f3896 AM |
13872 | insn = _bfd_elf_ppc_at_tls_transform (insn, 13); |
13873 | if (insn == 0) | |
411e1bfb | 13874 | abort (); |
95f0d0d2 | 13875 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
411e1bfb | 13876 | /* Was PPC64_TLS which sits on insn boundary, now |
4fe5ca5b GM |
13877 | PPC64_TPREL16_LO which is at low-order half-word. */ |
13878 | rel->r_offset += d_offset; | |
0d4792f7 AM |
13879 | r_type = R_PPC64_TPREL16_LO; |
13880 | if (toc_symndx != 0) | |
13881 | { | |
13882 | rel->r_info = ELF64_R_INFO (toc_symndx, r_type); | |
3a71aa26 | 13883 | rel->r_addend = toc_addend; |
0d4792f7 AM |
13884 | /* We changed the symbol. Start over in order to |
13885 | get h, sym, sec etc. right. */ | |
c316a17c | 13886 | goto again; |
0d4792f7 AM |
13887 | } |
13888 | else | |
13889 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
411e1bfb AM |
13890 | } |
13891 | break; | |
13892 | ||
411e1bfb AM |
13893 | case R_PPC64_GOT_TLSGD16_HI: |
13894 | case R_PPC64_GOT_TLSGD16_HA: | |
951fd09b | 13895 | tls_gd = TLS_TPRELGD; |
37da22e5 | 13896 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
951fd09b AM |
13897 | goto tls_gdld_hi; |
13898 | break; | |
13899 | ||
411e1bfb AM |
13900 | case R_PPC64_GOT_TLSLD16_HI: |
13901 | case R_PPC64_GOT_TLSLD16_HA: | |
37da22e5 | 13902 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
411e1bfb | 13903 | { |
951fd09b AM |
13904 | tls_gdld_hi: |
13905 | if ((tls_mask & tls_gd) != 0) | |
13906 | r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) | |
13907 | + R_PPC64_GOT_TPREL16_DS); | |
13908 | else | |
411e1bfb | 13909 | { |
4fe5ca5b | 13910 | rel->r_offset -= d_offset; |
95f0d0d2 | 13911 | bfd_put_32 (input_bfd, NOP, contents + rel->r_offset); |
951fd09b | 13912 | r_type = R_PPC64_NONE; |
411e1bfb | 13913 | } |
951fd09b | 13914 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
411e1bfb AM |
13915 | } |
13916 | break; | |
13917 | ||
951fd09b AM |
13918 | case R_PPC64_GOT_TLSGD16: |
13919 | case R_PPC64_GOT_TLSGD16_LO: | |
13920 | tls_gd = TLS_TPRELGD; | |
37da22e5 | 13921 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
102890f0 | 13922 | goto tls_ldgd_opt; |
951fd09b | 13923 | break; |
411e1bfb | 13924 | |
951fd09b AM |
13925 | case R_PPC64_GOT_TLSLD16: |
13926 | case R_PPC64_GOT_TLSLD16_LO: | |
37da22e5 | 13927 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
951fd09b | 13928 | { |
b9f04fe0 | 13929 | unsigned int insn1, insn2; |
102890f0 AM |
13930 | bfd_vma offset; |
13931 | ||
13932 | tls_ldgd_opt: | |
727fc41e AM |
13933 | offset = (bfd_vma) -1; |
13934 | /* If not using the newer R_PPC64_TLSGD/LD to mark | |
13935 | __tls_get_addr calls, we must trust that the call | |
13936 | stays with its arg setup insns, ie. that the next | |
13937 | reloc is the __tls_get_addr call associated with | |
13938 | the current reloc. Edit both insns. */ | |
13939 | if (input_section->has_tls_get_addr_call | |
13940 | && rel + 1 < relend | |
13941 | && branch_reloc_hash_match (input_bfd, rel + 1, | |
13942 | htab->tls_get_addr, | |
13943 | htab->tls_get_addr_fd)) | |
13944 | offset = rel[1].r_offset; | |
b86ac8e3 AM |
13945 | /* We read the low GOT_TLS (or TOC16) insn because we |
13946 | need to keep the destination reg. It may be | |
13947 | something other than the usual r3, and moved to r3 | |
13948 | before the call by intervening code. */ | |
95f0d0d2 | 13949 | insn1 = bfd_get_32 (input_bfd, |
b86ac8e3 | 13950 | contents + rel->r_offset - d_offset); |
102890f0 | 13951 | if ((tls_mask & tls_gd) != 0) |
411e1bfb | 13952 | { |
102890f0 | 13953 | /* IE */ |
b86ac8e3 | 13954 | insn1 &= (0x1f << 21) | (0x1f << 16); |
102890f0 AM |
13955 | insn1 |= 58 << 26; /* ld */ |
13956 | insn2 = 0x7c636a14; /* add 3,3,13 */ | |
727fc41e | 13957 | if (offset != (bfd_vma) -1) |
f58d5a2d | 13958 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); |
102890f0 AM |
13959 | if ((tls_mask & TLS_EXPLICIT) == 0) |
13960 | r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) | |
13961 | + R_PPC64_GOT_TPREL16_DS); | |
411e1bfb | 13962 | else |
102890f0 AM |
13963 | r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16; |
13964 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
13965 | } | |
13966 | else | |
13967 | { | |
13968 | /* LE */ | |
b86ac8e3 AM |
13969 | insn1 &= 0x1f << 21; |
13970 | insn1 |= 0x3c0d0000; /* addis r,13,0 */ | |
102890f0 AM |
13971 | insn2 = 0x38630000; /* addi 3,3,0 */ |
13972 | if (tls_gd == 0) | |
951fd09b | 13973 | { |
102890f0 | 13974 | /* Was an LD reloc. */ |
1d483afe AM |
13975 | if (toc_symndx) |
13976 | sec = local_sections[toc_symndx]; | |
13977 | for (r_symndx = 0; | |
13978 | r_symndx < symtab_hdr->sh_info; | |
13979 | r_symndx++) | |
13980 | if (local_sections[r_symndx] == sec) | |
13981 | break; | |
13982 | if (r_symndx >= symtab_hdr->sh_info) | |
cf35638d | 13983 | r_symndx = STN_UNDEF; |
102890f0 | 13984 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
cf35638d | 13985 | if (r_symndx != STN_UNDEF) |
1d483afe AM |
13986 | rel->r_addend -= (local_syms[r_symndx].st_value |
13987 | + sec->output_offset | |
13988 | + sec->output_section->vma); | |
951fd09b | 13989 | } |
102890f0 | 13990 | else if (toc_symndx != 0) |
3a71aa26 AM |
13991 | { |
13992 | r_symndx = toc_symndx; | |
13993 | rel->r_addend = toc_addend; | |
13994 | } | |
102890f0 AM |
13995 | r_type = R_PPC64_TPREL16_HA; |
13996 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
727fc41e AM |
13997 | if (offset != (bfd_vma) -1) |
13998 | { | |
13999 | rel[1].r_info = ELF64_R_INFO (r_symndx, | |
14000 | R_PPC64_TPREL16_LO); | |
14001 | rel[1].r_offset = offset + d_offset; | |
14002 | rel[1].r_addend = rel->r_addend; | |
14003 | } | |
102890f0 | 14004 | } |
95f0d0d2 | 14005 | bfd_put_32 (input_bfd, insn1, |
3a71aa26 | 14006 | contents + rel->r_offset - d_offset); |
727fc41e | 14007 | if (offset != (bfd_vma) -1) |
c96e0573 AM |
14008 | { |
14009 | bfd_put_32 (input_bfd, insn2, contents + offset); | |
14010 | if (offset + 8 <= input_section->size) | |
14011 | { | |
14012 | insn2 = bfd_get_32 (input_bfd, contents + offset + 4); | |
14013 | if (insn2 == LD_R2_0R1 + STK_TOC (htab)) | |
14014 | bfd_put_32 (input_bfd, NOP, contents + offset + 4); | |
14015 | } | |
14016 | } | |
727fc41e AM |
14017 | if ((tls_mask & tls_gd) == 0 |
14018 | && (tls_gd == 0 || toc_symndx != 0)) | |
14019 | { | |
14020 | /* We changed the symbol. Start over in order | |
14021 | to get h, sym, sec etc. right. */ | |
c316a17c | 14022 | goto again; |
727fc41e AM |
14023 | } |
14024 | } | |
14025 | break; | |
14026 | ||
14027 | case R_PPC64_TLSGD: | |
37da22e5 | 14028 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 |
675e2809 | 14029 | && rel + 1 < relend) |
727fc41e | 14030 | { |
b9f04fe0 | 14031 | unsigned int insn2; |
727fc41e AM |
14032 | bfd_vma offset = rel->r_offset; |
14033 | ||
23cedd1d AM |
14034 | if (is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info))) |
14035 | { | |
14036 | bfd_put_32 (output_bfd, NOP, contents + offset); | |
14037 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); | |
14038 | break; | |
14039 | } | |
14040 | ||
14041 | if (ELF64_R_TYPE (rel[1].r_info) == R_PPC64_PLTCALL) | |
14042 | bfd_put_32 (output_bfd, NOP, contents + offset + 4); | |
14043 | ||
727fc41e AM |
14044 | if ((tls_mask & TLS_TPRELGD) != 0) |
14045 | { | |
14046 | /* IE */ | |
14047 | r_type = R_PPC64_NONE; | |
14048 | insn2 = 0x7c636a14; /* add 3,3,13 */ | |
14049 | } | |
14050 | else | |
14051 | { | |
14052 | /* LE */ | |
14053 | if (toc_symndx != 0) | |
14054 | { | |
14055 | r_symndx = toc_symndx; | |
14056 | rel->r_addend = toc_addend; | |
14057 | } | |
14058 | r_type = R_PPC64_TPREL16_LO; | |
14059 | rel->r_offset = offset + d_offset; | |
14060 | insn2 = 0x38630000; /* addi 3,3,0 */ | |
14061 | } | |
14062 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
14063 | /* Zap the reloc on the _tls_get_addr call too. */ | |
14064 | BFD_ASSERT (offset == rel[1].r_offset); | |
f58d5a2d | 14065 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); |
95f0d0d2 | 14066 | bfd_put_32 (input_bfd, insn2, contents + offset); |
727fc41e | 14067 | if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0) |
c316a17c | 14068 | goto again; |
411e1bfb | 14069 | } |
411e1bfb AM |
14070 | break; |
14071 | ||
727fc41e | 14072 | case R_PPC64_TLSLD: |
37da22e5 | 14073 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 |
675e2809 | 14074 | && rel + 1 < relend) |
727fc41e | 14075 | { |
b9f04fe0 | 14076 | unsigned int insn2; |
727fc41e AM |
14077 | bfd_vma offset = rel->r_offset; |
14078 | ||
23cedd1d AM |
14079 | if (is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info))) |
14080 | { | |
14081 | bfd_put_32 (output_bfd, NOP, contents + offset); | |
14082 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); | |
14083 | break; | |
14084 | } | |
14085 | ||
14086 | if (ELF64_R_TYPE (rel[1].r_info) == R_PPC64_PLTCALL) | |
14087 | bfd_put_32 (output_bfd, NOP, contents + offset + 4); | |
14088 | ||
727fc41e AM |
14089 | if (toc_symndx) |
14090 | sec = local_sections[toc_symndx]; | |
14091 | for (r_symndx = 0; | |
14092 | r_symndx < symtab_hdr->sh_info; | |
14093 | r_symndx++) | |
14094 | if (local_sections[r_symndx] == sec) | |
14095 | break; | |
14096 | if (r_symndx >= symtab_hdr->sh_info) | |
cf35638d | 14097 | r_symndx = STN_UNDEF; |
727fc41e | 14098 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
cf35638d | 14099 | if (r_symndx != STN_UNDEF) |
727fc41e AM |
14100 | rel->r_addend -= (local_syms[r_symndx].st_value |
14101 | + sec->output_offset | |
14102 | + sec->output_section->vma); | |
14103 | ||
14104 | r_type = R_PPC64_TPREL16_LO; | |
14105 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
14106 | rel->r_offset = offset + d_offset; | |
14107 | /* Zap the reloc on the _tls_get_addr call too. */ | |
14108 | BFD_ASSERT (offset == rel[1].r_offset); | |
f58d5a2d | 14109 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); |
727fc41e | 14110 | insn2 = 0x38630000; /* addi 3,3,0 */ |
95f0d0d2 | 14111 | bfd_put_32 (input_bfd, insn2, contents + offset); |
c316a17c | 14112 | goto again; |
727fc41e AM |
14113 | } |
14114 | break; | |
14115 | ||
411e1bfb | 14116 | case R_PPC64_DTPMOD64: |
951fd09b AM |
14117 | if (rel + 1 < relend |
14118 | && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) | |
14119 | && rel[1].r_offset == rel->r_offset + 8) | |
411e1bfb | 14120 | { |
951fd09b AM |
14121 | if ((tls_mask & TLS_GD) == 0) |
14122 | { | |
14123 | rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE); | |
14124 | if ((tls_mask & TLS_TPRELGD) != 0) | |
14125 | r_type = R_PPC64_TPREL64; | |
14126 | else | |
14127 | { | |
4ce794b7 | 14128 | bfd_put_64 (output_bfd, 1, contents + rel->r_offset); |
951fd09b AM |
14129 | r_type = R_PPC64_NONE; |
14130 | } | |
14131 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
14132 | } | |
14133 | } | |
14134 | else | |
14135 | { | |
14136 | if ((tls_mask & TLS_LD) == 0) | |
411e1bfb | 14137 | { |
4ce794b7 | 14138 | bfd_put_64 (output_bfd, 1, contents + rel->r_offset); |
411e1bfb | 14139 | r_type = R_PPC64_NONE; |
951fd09b | 14140 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
411e1bfb | 14141 | } |
411e1bfb AM |
14142 | } |
14143 | break; | |
14144 | ||
14145 | case R_PPC64_TPREL64: | |
951fd09b | 14146 | if ((tls_mask & TLS_TPREL) == 0) |
411e1bfb AM |
14147 | { |
14148 | r_type = R_PPC64_NONE; | |
14149 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
14150 | } | |
14151 | break; | |
52a82034 | 14152 | |
006589cf AM |
14153 | case R_PPC64_ENTRY: |
14154 | relocation = TOCstart + htab->sec_info[input_section->id].toc_off; | |
14155 | if (!bfd_link_pic (info) | |
14156 | && !info->traditional_format | |
14157 | && relocation + 0x80008000 <= 0xffffffff) | |
14158 | { | |
14159 | unsigned int insn1, insn2; | |
14160 | ||
14161 | insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
14162 | insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); | |
14163 | if ((insn1 & ~0xfffc) == LD_R2_0R12 | |
14164 | && insn2 == ADD_R2_R2_R12) | |
14165 | { | |
95f0d0d2 | 14166 | bfd_put_32 (input_bfd, |
006589cf AM |
14167 | LIS_R2 + PPC_HA (relocation), |
14168 | contents + rel->r_offset); | |
95f0d0d2 | 14169 | bfd_put_32 (input_bfd, |
006589cf AM |
14170 | ADDI_R2_R2 + PPC_LO (relocation), |
14171 | contents + rel->r_offset + 4); | |
14172 | } | |
14173 | } | |
14174 | else | |
14175 | { | |
14176 | relocation -= (rel->r_offset | |
14177 | + input_section->output_offset | |
14178 | + input_section->output_section->vma); | |
14179 | if (relocation + 0x80008000 <= 0xffffffff) | |
14180 | { | |
14181 | unsigned int insn1, insn2; | |
14182 | ||
14183 | insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
14184 | insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); | |
14185 | if ((insn1 & ~0xfffc) == LD_R2_0R12 | |
14186 | && insn2 == ADD_R2_R2_R12) | |
14187 | { | |
95f0d0d2 | 14188 | bfd_put_32 (input_bfd, |
006589cf AM |
14189 | ADDIS_R2_R12 + PPC_HA (relocation), |
14190 | contents + rel->r_offset); | |
95f0d0d2 | 14191 | bfd_put_32 (input_bfd, |
006589cf AM |
14192 | ADDI_R2_R2 + PPC_LO (relocation), |
14193 | contents + rel->r_offset + 4); | |
14194 | } | |
14195 | } | |
14196 | } | |
14197 | break; | |
14198 | ||
52a82034 AM |
14199 | case R_PPC64_REL16_HA: |
14200 | /* If we are generating a non-PIC executable, edit | |
14201 | . 0: addis 2,12,.TOC.-0b@ha | |
14202 | . addi 2,2,.TOC.-0b@l | |
14203 | used by ELFv2 global entry points to set up r2, to | |
14204 | . lis 2,.TOC.@ha | |
14205 | . addi 2,2,.TOC.@l | |
14206 | if .TOC. is in range. */ | |
0e1862bb | 14207 | if (!bfd_link_pic (info) |
810d4e75 | 14208 | && !info->traditional_format |
006589cf | 14209 | && !htab->opd_abi |
4f038ee5 | 14210 | && rel->r_addend == d_offset |
52a82034 AM |
14211 | && h != NULL && &h->elf == htab->elf.hgot |
14212 | && rel + 1 < relend | |
14213 | && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO) | |
14214 | && rel[1].r_offset == rel->r_offset + 4 | |
14215 | && rel[1].r_addend == rel->r_addend + 4 | |
14216 | && relocation + 0x80008000 <= 0xffffffff) | |
14217 | { | |
14218 | unsigned int insn1, insn2; | |
14219 | bfd_vma offset = rel->r_offset - d_offset; | |
95f0d0d2 AM |
14220 | insn1 = bfd_get_32 (input_bfd, contents + offset); |
14221 | insn2 = bfd_get_32 (input_bfd, contents + offset + 4); | |
006589cf AM |
14222 | if ((insn1 & 0xffff0000) == ADDIS_R2_R12 |
14223 | && (insn2 & 0xffff0000) == ADDI_R2_R2) | |
52a82034 AM |
14224 | { |
14225 | r_type = R_PPC64_ADDR16_HA; | |
14226 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
14227 | rel->r_addend -= d_offset; | |
14228 | rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO); | |
14229 | rel[1].r_addend -= d_offset + 4; | |
95f0d0d2 | 14230 | bfd_put_32 (input_bfd, LIS_R2, contents + offset); |
52a82034 AM |
14231 | } |
14232 | } | |
14233 | break; | |
411e1bfb AM |
14234 | } |
14235 | ||
14236 | /* Handle other relocations that tweak non-addend part of insn. */ | |
86c76c7b | 14237 | insn = 0; |
b25116a9 AM |
14238 | max_br_offset = 1 << 25; |
14239 | addend = rel->r_addend; | |
bc30df16 | 14240 | reloc_dest = DEST_NORMAL; |
65f38f15 | 14241 | switch (r_type) |
5bd4f169 AM |
14242 | { |
14243 | default: | |
65f38f15 | 14244 | break; |
5bd4f169 | 14245 | |
3b421ab3 AM |
14246 | case R_PPC64_TOCSAVE: |
14247 | if (relocation + addend == (rel->r_offset | |
14248 | + input_section->output_offset | |
14249 | + input_section->output_section->vma) | |
14250 | && tocsave_find (htab, NO_INSERT, | |
14251 | &local_syms, rel, input_bfd)) | |
14252 | { | |
14253 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
14254 | if (insn == NOP | |
14255 | || insn == CROR_151515 || insn == CROR_313131) | |
a078d95a AM |
14256 | bfd_put_32 (input_bfd, |
14257 | STD_R2_0R1 + STK_TOC (htab), | |
3b421ab3 AM |
14258 | contents + rel->r_offset); |
14259 | } | |
14260 | break; | |
14261 | ||
65f38f15 AM |
14262 | /* Branch taken prediction relocations. */ |
14263 | case R_PPC64_ADDR14_BRTAKEN: | |
14264 | case R_PPC64_REL14_BRTAKEN: | |
cedb70c5 | 14265 | insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ |
1a0670f3 | 14266 | /* Fall through. */ |
65f38f15 | 14267 | |
86c76c7b | 14268 | /* Branch not taken prediction relocations. */ |
65f38f15 AM |
14269 | case R_PPC64_ADDR14_BRNTAKEN: |
14270 | case R_PPC64_REL14_BRNTAKEN: | |
95f0d0d2 | 14271 | insn |= bfd_get_32 (input_bfd, |
411e1bfb | 14272 | contents + rel->r_offset) & ~(0x01 << 21); |
1a0670f3 | 14273 | /* Fall through. */ |
86c76c7b | 14274 | |
b25116a9 AM |
14275 | case R_PPC64_REL14: |
14276 | max_br_offset = 1 << 15; | |
1a0670f3 | 14277 | /* Fall through. */ |
5bd4f169 | 14278 | |
65f38f15 | 14279 | case R_PPC64_REL24: |
05d0e962 | 14280 | case R_PPC64_REL24_NOTOC: |
23cedd1d | 14281 | case R_PPC64_PLTCALL: |
ad8e1ba5 AM |
14282 | /* Calls to functions with a different TOC, such as calls to |
14283 | shared objects, need to alter the TOC pointer. This is | |
14284 | done using a linkage stub. A REL24 branching to these | |
14285 | linkage stubs needs to be followed by a nop, as the nop | |
14286 | will be replaced with an instruction to restore the TOC | |
14287 | base pointer. */ | |
8387904d | 14288 | fdh = h; |
b31867b6 AM |
14289 | if (h != NULL |
14290 | && h->oh != NULL | |
14291 | && h->oh->is_func_descriptor) | |
14292 | fdh = ppc_follow_link (h->oh); | |
31c76678 DK |
14293 | stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel, |
14294 | htab); | |
23cedd1d AM |
14295 | if (r_type == R_PPC64_PLTCALL |
14296 | && stub_entry != NULL | |
05d0e962 AM |
14297 | && stub_entry->stub_type >= ppc_stub_plt_call |
14298 | && stub_entry->stub_type <= ppc_stub_plt_call_both) | |
23cedd1d AM |
14299 | stub_entry = NULL; |
14300 | ||
6abec6bc | 14301 | if (stub_entry != NULL |
d0abeec8 AM |
14302 | && ((stub_entry->stub_type >= ppc_stub_plt_call |
14303 | && stub_entry->stub_type <= ppc_stub_plt_call_both) | |
ad8e1ba5 | 14304 | || stub_entry->stub_type == ppc_stub_plt_branch_r2off |
05d0e962 AM |
14305 | || stub_entry->stub_type == ppc_stub_plt_branch_both |
14306 | || stub_entry->stub_type == ppc_stub_long_branch_r2off | |
14307 | || stub_entry->stub_type == ppc_stub_long_branch_both)) | |
41bd81ab | 14308 | { |
b25116a9 | 14309 | bfd_boolean can_plt_call = FALSE; |
721956f4 | 14310 | |
6e1816be AM |
14311 | if (stub_entry->stub_type == ppc_stub_plt_call |
14312 | && !htab->opd_abi | |
14313 | && htab->params->plt_localentry0 != 0 | |
14314 | && is_elfv2_localentry0 (&h->elf)) | |
14315 | { | |
14316 | /* The function doesn't use or change r2. */ | |
14317 | can_plt_call = TRUE; | |
14318 | } | |
05d0e962 AM |
14319 | else if (r_type == R_PPC64_REL24_NOTOC) |
14320 | { | |
14321 | /* NOTOC calls don't need to restore r2. */ | |
14322 | can_plt_call = TRUE; | |
14323 | } | |
6e1816be | 14324 | |
f378ab09 | 14325 | /* All of these stubs may modify r2, so there must be a |
ba8ca3e7 AM |
14326 | branch and link followed by a nop. The nop is |
14327 | replaced by an insn to restore r2. */ | |
6e1816be | 14328 | else if (rel->r_offset + 8 <= input_section->size) |
41bd81ab | 14329 | { |
ba8ca3e7 AM |
14330 | unsigned long br; |
14331 | ||
14332 | br = bfd_get_32 (input_bfd, | |
14333 | contents + rel->r_offset); | |
14334 | if ((br & 1) != 0) | |
41bd81ab | 14335 | { |
ba8ca3e7 AM |
14336 | unsigned long nop; |
14337 | ||
14338 | nop = bfd_get_32 (input_bfd, | |
14339 | contents + rel->r_offset + 4); | |
23cedd1d AM |
14340 | if (nop == LD_R2_0R1 + STK_TOC (htab)) |
14341 | can_plt_call = TRUE; | |
14342 | else if (nop == NOP | |
14343 | || nop == CROR_151515 | |
14344 | || nop == CROR_313131) | |
a7f2871e | 14345 | { |
ba8ca3e7 AM |
14346 | if (h != NULL |
14347 | && (h == htab->tls_get_addr_fd | |
14348 | || h == htab->tls_get_addr) | |
7c9cf415 | 14349 | && htab->params->tls_get_addr_opt) |
ba8ca3e7 AM |
14350 | { |
14351 | /* Special stub used, leave nop alone. */ | |
14352 | } | |
14353 | else | |
a078d95a AM |
14354 | bfd_put_32 (input_bfd, |
14355 | LD_R2_0R1 + STK_TOC (htab), | |
ba8ca3e7 AM |
14356 | contents + rel->r_offset + 4); |
14357 | can_plt_call = TRUE; | |
a7f2871e | 14358 | } |
41bd81ab | 14359 | } |
5bd4f169 | 14360 | } |
721956f4 | 14361 | |
ba8ca3e7 | 14362 | if (!can_plt_call && h != NULL) |
721956f4 | 14363 | { |
ba8ca3e7 AM |
14364 | const char *name = h->elf.root.root.string; |
14365 | ||
14366 | if (*name == '.') | |
14367 | ++name; | |
14368 | ||
14369 | if (strncmp (name, "__libc_start_main", 17) == 0 | |
14370 | && (name[17] == 0 || name[17] == '@')) | |
6ab189d5 | 14371 | { |
ba8ca3e7 AM |
14372 | /* Allow crt1 branch to go via a toc adjusting |
14373 | stub. Other calls that never return could do | |
14374 | the same, if we could detect such. */ | |
b25116a9 | 14375 | can_plt_call = TRUE; |
6ab189d5 | 14376 | } |
ba8ca3e7 AM |
14377 | } |
14378 | ||
14379 | if (!can_plt_call) | |
14380 | { | |
14381 | /* g++ as of 20130507 emits self-calls without a | |
14382 | following nop. This is arguably wrong since we | |
14383 | have conflicting information. On the one hand a | |
14384 | global symbol and on the other a local call | |
14385 | sequence, but don't error for this special case. | |
14386 | It isn't possible to cheaply verify we have | |
14387 | exactly such a call. Allow all calls to the same | |
14388 | section. */ | |
14389 | asection *code_sec = sec; | |
14390 | ||
14391 | if (get_opd_info (sec) != NULL) | |
ad8e1ba5 | 14392 | { |
ba8ca3e7 AM |
14393 | bfd_vma off = (relocation + addend |
14394 | - sec->output_section->vma | |
14395 | - sec->output_offset); | |
bc30df16 | 14396 | |
ba8ca3e7 | 14397 | opd_entry_value (sec, off, &code_sec, NULL, FALSE); |
ad8e1ba5 | 14398 | } |
ba8ca3e7 AM |
14399 | if (code_sec == input_section) |
14400 | can_plt_call = TRUE; | |
14401 | } | |
14402 | ||
14403 | if (!can_plt_call) | |
14404 | { | |
05d0e962 AM |
14405 | if (stub_entry->stub_type >= ppc_stub_plt_call |
14406 | && stub_entry->stub_type <= ppc_stub_plt_call_both) | |
4805fc55 | 14407 | info->callbacks->einfo |
695344c0 | 14408 | /* xgettext:c-format */ |
c1c8c1ef | 14409 | (_("%H: call to `%pT' lacks nop, can't restore toc; " |
f53ad3cf | 14410 | "(plt call stub)\n"), |
4805fc55 AM |
14411 | input_bfd, input_section, rel->r_offset, sym_name); |
14412 | else | |
14413 | info->callbacks->einfo | |
695344c0 | 14414 | /* xgettext:c-format */ |
c1c8c1ef | 14415 | (_("%H: call to `%pT' lacks nop, can't restore toc; " |
f53ad3cf | 14416 | "(toc save/adjust stub)\n"), |
4805fc55 | 14417 | input_bfd, input_section, rel->r_offset, sym_name); |
ba8ca3e7 AM |
14418 | |
14419 | bfd_set_error (bfd_error_bad_value); | |
14420 | ret = FALSE; | |
721956f4 AM |
14421 | } |
14422 | ||
b25116a9 | 14423 | if (can_plt_call |
05d0e962 AM |
14424 | && stub_entry->stub_type >= ppc_stub_plt_call |
14425 | && stub_entry->stub_type <= ppc_stub_plt_call_both) | |
b25116a9 AM |
14426 | unresolved_reloc = FALSE; |
14427 | } | |
14428 | ||
6abec6bc AM |
14429 | if ((stub_entry == NULL |
14430 | || stub_entry->stub_type == ppc_stub_long_branch | |
14431 | || stub_entry->stub_type == ppc_stub_plt_branch) | |
8387904d AM |
14432 | && get_opd_info (sec) != NULL) |
14433 | { | |
14434 | /* The branch destination is the value of the opd entry. */ | |
4cc603a5 AM |
14435 | bfd_vma off = (relocation + addend |
14436 | - sec->output_section->vma | |
14437 | - sec->output_offset); | |
aef36ac1 | 14438 | bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE); |
8387904d AM |
14439 | if (dest != (bfd_vma) -1) |
14440 | { | |
14441 | relocation = dest; | |
14442 | addend = 0; | |
bc30df16 | 14443 | reloc_dest = DEST_OPD; |
8387904d AM |
14444 | } |
14445 | } | |
14446 | ||
b25116a9 AM |
14447 | /* If the branch is out of reach we ought to have a long |
14448 | branch stub. */ | |
14449 | from = (rel->r_offset | |
14450 | + input_section->output_offset | |
14451 | + input_section->output_section->vma); | |
14452 | ||
6911b7dc AM |
14453 | relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh |
14454 | ? fdh->elf.other | |
14455 | : sym->st_other); | |
14456 | ||
6abec6bc AM |
14457 | if (stub_entry != NULL |
14458 | && (stub_entry->stub_type == ppc_stub_long_branch | |
14459 | || stub_entry->stub_type == ppc_stub_plt_branch) | |
14460 | && (r_type == R_PPC64_ADDR14_BRTAKEN | |
14461 | || r_type == R_PPC64_ADDR14_BRNTAKEN | |
14462 | || (relocation + addend - from + max_br_offset | |
14463 | < 2 * max_br_offset))) | |
14464 | /* Don't use the stub if this branch is in range. */ | |
14465 | stub_entry = NULL; | |
b25116a9 | 14466 | |
05d0e962 AM |
14467 | if (stub_entry != NULL |
14468 | && (stub_entry->stub_type == ppc_stub_long_branch_notoc | |
14469 | || stub_entry->stub_type == ppc_stub_long_branch_both | |
14470 | || stub_entry->stub_type == ppc_stub_plt_branch_notoc | |
14471 | || stub_entry->stub_type == ppc_stub_plt_branch_both) | |
14472 | && (r_type != R_PPC64_REL24_NOTOC | |
14473 | || ((fdh ? fdh->elf.other : sym->st_other) | |
14474 | & STO_PPC64_LOCAL_MASK) == 1 << STO_PPC64_LOCAL_BIT) | |
14475 | && (relocation + addend - from + max_br_offset | |
14476 | < 2 * max_br_offset)) | |
14477 | stub_entry = NULL; | |
14478 | ||
14479 | if (stub_entry != NULL | |
14480 | && (stub_entry->stub_type == ppc_stub_long_branch_r2off | |
14481 | || stub_entry->stub_type == ppc_stub_long_branch_both | |
14482 | || stub_entry->stub_type == ppc_stub_plt_branch_r2off | |
14483 | || stub_entry->stub_type == ppc_stub_plt_branch_both) | |
14484 | && r_type == R_PPC64_REL24_NOTOC | |
14485 | && (relocation + addend - from + max_br_offset | |
14486 | < 2 * max_br_offset)) | |
14487 | stub_entry = NULL; | |
14488 | ||
b25116a9 AM |
14489 | if (stub_entry != NULL) |
14490 | { | |
14491 | /* Munge up the value and addend so that we call the stub | |
14492 | rather than the procedure directly. */ | |
a4b6fadd AM |
14493 | asection *stub_sec = stub_entry->group->stub_sec; |
14494 | ||
14495 | if (stub_entry->stub_type == ppc_stub_save_res) | |
14496 | relocation += (stub_sec->output_offset | |
14497 | + stub_sec->output_section->vma | |
14498 | + stub_sec->size - htab->sfpr->size | |
14499 | - htab->sfpr->output_offset | |
14500 | - htab->sfpr->output_section->vma); | |
14501 | else | |
14502 | relocation = (stub_entry->stub_offset | |
14503 | + stub_sec->output_offset | |
14504 | + stub_sec->output_section->vma); | |
b25116a9 | 14505 | addend = 0; |
bc30df16 | 14506 | reloc_dest = DEST_STUB; |
3b421ab3 | 14507 | |
05d0e962 AM |
14508 | if (((stub_entry->stub_type == ppc_stub_plt_call |
14509 | && ALWAYS_EMIT_R2SAVE) | |
14510 | || stub_entry->stub_type == ppc_stub_plt_call_r2save | |
14511 | || stub_entry->stub_type == ppc_stub_plt_call_both) | |
e81b4c93 AM |
14512 | && !(h != NULL |
14513 | && (h == htab->tls_get_addr_fd | |
14514 | || h == htab->tls_get_addr) | |
14515 | && htab->params->tls_get_addr_opt) | |
3b421ab3 AM |
14516 | && rel + 1 < relend |
14517 | && rel[1].r_offset == rel->r_offset + 4 | |
14518 | && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE) | |
14519 | relocation += 4; | |
05d0e962 AM |
14520 | else if ((stub_entry->stub_type == ppc_stub_long_branch_both |
14521 | || stub_entry->stub_type == ppc_stub_plt_branch_both | |
14522 | || stub_entry->stub_type == ppc_stub_plt_call_both) | |
14523 | && r_type == R_PPC64_REL24_NOTOC) | |
14524 | relocation += 4; | |
b25116a9 AM |
14525 | } |
14526 | ||
14527 | if (insn != 0) | |
14528 | { | |
794e51c0 | 14529 | if (is_isa_v2) |
721956f4 | 14530 | { |
b25116a9 AM |
14531 | /* Set 'a' bit. This is 0b00010 in BO field for branch |
14532 | on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
14533 | for branch on CTR insns (BO == 1a00t or 1a01t). */ | |
14534 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
14535 | insn |= 0x02 << 21; | |
14536 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
14537 | insn |= 0x08 << 21; | |
14538 | else | |
14539 | break; | |
14540 | } | |
14541 | else | |
14542 | { | |
14543 | /* Invert 'y' bit if not the default. */ | |
4cc603a5 | 14544 | if ((bfd_signed_vma) (relocation + addend - from) < 0) |
b25116a9 | 14545 | insn ^= 0x01 << 21; |
721956f4 | 14546 | } |
b25116a9 | 14547 | |
95f0d0d2 | 14548 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
5bd4f169 | 14549 | } |
e86ce104 | 14550 | |
06da1e8e AM |
14551 | /* NOP out calls to undefined weak functions. |
14552 | We can thus call a weak function without first | |
14553 | checking whether the function is defined. */ | |
b25116a9 | 14554 | else if (h != NULL |
039b3fef | 14555 | && h->elf.root.type == bfd_link_hash_undefweak |
766bc656 | 14556 | && h->elf.dynindx == -1 |
05d0e962 AM |
14557 | && (r_type == R_PPC64_REL24 |
14558 | || r_type == R_PPC64_REL24_NOTOC) | |
b25116a9 | 14559 | && relocation == 0 |
4cc603a5 | 14560 | && addend == 0) |
e86ce104 | 14561 | { |
95f0d0d2 | 14562 | bfd_put_32 (input_bfd, NOP, contents + rel->r_offset); |
c316a17c | 14563 | goto copy_reloc; |
e86ce104 | 14564 | } |
65f38f15 | 14565 | break; |
066f4018 AM |
14566 | |
14567 | case R_PPC64_GOT16_DS: | |
14568 | from = TOCstart + htab->sec_info[input_section->id].toc_off; | |
14569 | if (relocation + addend - from + 0x8000 < 0x10000 | |
14570 | && SYMBOL_REFERENCES_LOCAL (info, &h->elf)) | |
14571 | { | |
14572 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); | |
14573 | if ((insn & (0x3f << 26 | 0x3)) == 58u << 26 /* ld */) | |
14574 | { | |
14575 | insn += (14u << 26) - (58u << 26); | |
14576 | bfd_put_32 (input_bfd, insn, contents + (rel->r_offset & ~3)); | |
14577 | r_type = R_PPC64_TOC16; | |
14578 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
14579 | } | |
14580 | } | |
14581 | break; | |
14582 | ||
14583 | case R_PPC64_GOT16_LO_DS: | |
14584 | case R_PPC64_GOT16_HA: | |
14585 | from = TOCstart + htab->sec_info[input_section->id].toc_off; | |
14586 | if (relocation + addend - from + 0x80008000ULL < 0x100000000ULL | |
14587 | && SYMBOL_REFERENCES_LOCAL (info, &h->elf)) | |
14588 | { | |
14589 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); | |
14590 | if ((insn & (0x3f << 26 | 0x3)) == 58u << 26 /* ld */) | |
14591 | { | |
14592 | insn += (14u << 26) - (58u << 26); | |
14593 | bfd_put_32 (input_bfd, insn, contents + (rel->r_offset & ~3)); | |
14594 | r_type = R_PPC64_TOC16_LO; | |
14595 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
14596 | } | |
14597 | else if ((insn & (0x3f << 26)) == 15u << 26 /* addis */) | |
14598 | { | |
14599 | r_type = R_PPC64_TOC16_HA; | |
14600 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); | |
14601 | } | |
14602 | } | |
14603 | break; | |
65f38f15 | 14604 | } |
5bd4f169 | 14605 | |
65f38f15 | 14606 | /* Set `addend'. */ |
411e1bfb | 14607 | tls_type = 0; |
23cedd1d | 14608 | save_unresolved_reloc = unresolved_reloc; |
65f38f15 AM |
14609 | switch (r_type) |
14610 | { | |
14611 | default: | |
cf97bcb0 AM |
14612 | /* xgettext:c-format */ |
14613 | _bfd_error_handler (_("%pB: %s unsupported"), | |
14614 | input_bfd, ppc64_elf_howto_table[r_type]->name); | |
5bd4f169 | 14615 | |
65f38f15 | 14616 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 14617 | ret = FALSE; |
c316a17c | 14618 | goto copy_reloc; |
5bd4f169 | 14619 | |
65f38f15 | 14620 | case R_PPC64_NONE: |
411e1bfb | 14621 | case R_PPC64_TLS: |
727fc41e AM |
14622 | case R_PPC64_TLSGD: |
14623 | case R_PPC64_TLSLD: | |
3b421ab3 | 14624 | case R_PPC64_TOCSAVE: |
04c9666a AM |
14625 | case R_PPC64_GNU_VTINHERIT: |
14626 | case R_PPC64_GNU_VTENTRY: | |
006589cf | 14627 | case R_PPC64_ENTRY: |
c316a17c | 14628 | goto copy_reloc; |
5bd4f169 AM |
14629 | |
14630 | /* GOT16 relocations. Like an ADDR16 using the symbol's | |
14631 | address in the GOT as relocation value instead of the | |
411e1bfb | 14632 | symbol's value itself. Also, create a GOT entry for the |
5bd4f169 | 14633 | symbol and put the symbol value there. */ |
411e1bfb AM |
14634 | case R_PPC64_GOT_TLSGD16: |
14635 | case R_PPC64_GOT_TLSGD16_LO: | |
14636 | case R_PPC64_GOT_TLSGD16_HI: | |
14637 | case R_PPC64_GOT_TLSGD16_HA: | |
951fd09b | 14638 | tls_type = TLS_TLS | TLS_GD; |
411e1bfb AM |
14639 | goto dogot; |
14640 | ||
14641 | case R_PPC64_GOT_TLSLD16: | |
14642 | case R_PPC64_GOT_TLSLD16_LO: | |
14643 | case R_PPC64_GOT_TLSLD16_HI: | |
14644 | case R_PPC64_GOT_TLSLD16_HA: | |
951fd09b | 14645 | tls_type = TLS_TLS | TLS_LD; |
411e1bfb AM |
14646 | goto dogot; |
14647 | ||
14648 | case R_PPC64_GOT_TPREL16_DS: | |
14649 | case R_PPC64_GOT_TPREL16_LO_DS: | |
14650 | case R_PPC64_GOT_TPREL16_HI: | |
14651 | case R_PPC64_GOT_TPREL16_HA: | |
14652 | tls_type = TLS_TLS | TLS_TPREL; | |
14653 | goto dogot; | |
14654 | ||
14655 | case R_PPC64_GOT_DTPREL16_DS: | |
14656 | case R_PPC64_GOT_DTPREL16_LO_DS: | |
14657 | case R_PPC64_GOT_DTPREL16_HI: | |
14658 | case R_PPC64_GOT_DTPREL16_HA: | |
14659 | tls_type = TLS_TLS | TLS_DTPREL; | |
14660 | goto dogot; | |
14661 | ||
65f38f15 AM |
14662 | case R_PPC64_GOT16: |
14663 | case R_PPC64_GOT16_LO: | |
14664 | case R_PPC64_GOT16_HI: | |
14665 | case R_PPC64_GOT16_HA: | |
14666 | case R_PPC64_GOT16_DS: | |
14667 | case R_PPC64_GOT16_LO_DS: | |
411e1bfb | 14668 | dogot: |
5bd4f169 AM |
14669 | { |
14670 | /* Relocation is to the entry for this symbol in the global | |
14671 | offset table. */ | |
e717da7e | 14672 | asection *got; |
d881513a | 14673 | bfd_vma *offp; |
5bd4f169 | 14674 | bfd_vma off; |
d881513a | 14675 | unsigned long indx = 0; |
927be08e | 14676 | struct got_entry *ent; |
65f38f15 | 14677 | |
d881513a AM |
14678 | if (tls_type == (TLS_TLS | TLS_LD) |
14679 | && (h == NULL | |
f5385ebf | 14680 | || !h->elf.def_dynamic)) |
927be08e | 14681 | ent = ppc64_tlsld_got (input_bfd); |
411e1bfb | 14682 | else |
5bd4f169 | 14683 | { |
d881513a AM |
14684 | if (h != NULL) |
14685 | { | |
f0158f44 AM |
14686 | if (!htab->elf.dynamic_sections_created |
14687 | || h->elf.dynindx == -1 | |
14688 | || SYMBOL_REFERENCES_LOCAL (info, &h->elf) | |
21d68fcd | 14689 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)) |
d881513a AM |
14690 | /* This is actually a static link, or it is a |
14691 | -Bsymbolic link and the symbol is defined | |
14692 | locally, or the symbol was forced to be local | |
14693 | because of a version file. */ | |
14694 | ; | |
14695 | else | |
14696 | { | |
039b3fef | 14697 | indx = h->elf.dynindx; |
d881513a AM |
14698 | unresolved_reloc = FALSE; |
14699 | } | |
039b3fef | 14700 | ent = h->elf.got.glist; |
d881513a | 14701 | } |
411e1bfb | 14702 | else |
5bd4f169 | 14703 | { |
d881513a AM |
14704 | if (local_got_ents == NULL) |
14705 | abort (); | |
14706 | ent = local_got_ents[r_symndx]; | |
5bd4f169 | 14707 | } |
d881513a AM |
14708 | |
14709 | for (; ent != NULL; ent = ent->next) | |
31c76678 | 14710 | if (ent->addend == orig_rel.r_addend |
e717da7e | 14711 | && ent->owner == input_bfd |
d881513a AM |
14712 | && ent->tls_type == tls_type) |
14713 | break; | |
5bd4f169 | 14714 | } |
411e1bfb | 14715 | |
927be08e AM |
14716 | if (ent == NULL) |
14717 | abort (); | |
14718 | if (ent->is_indirect) | |
14719 | ent = ent->got.ent; | |
14720 | offp = &ent->got.offset; | |
14721 | got = ppc64_elf_tdata (ent->owner)->got; | |
e717da7e AM |
14722 | if (got == NULL) |
14723 | abort (); | |
14724 | ||
411e1bfb AM |
14725 | /* The offset must always be a multiple of 8. We use the |
14726 | least significant bit to record whether we have already | |
14727 | processed this entry. */ | |
d881513a | 14728 | off = *offp; |
411e1bfb AM |
14729 | if ((off & 1) != 0) |
14730 | off &= ~1; | |
5bd4f169 AM |
14731 | else |
14732 | { | |
411e1bfb AM |
14733 | /* Generate relocs for the dynamic linker, except in |
14734 | the case of TLSLD where we'll use one entry per | |
14735 | module. */ | |
25f23106 AM |
14736 | asection *relgot; |
14737 | bfd_boolean ifunc; | |
e717da7e | 14738 | |
d881513a | 14739 | *offp = off | 1; |
25f23106 AM |
14740 | relgot = NULL; |
14741 | ifunc = (h != NULL | |
14742 | ? h->elf.type == STT_GNU_IFUNC | |
14743 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC); | |
19e08130 | 14744 | if (ifunc) |
82e66161 AM |
14745 | { |
14746 | relgot = htab->elf.irelplt; | |
14747 | if (indx == 0) | |
14748 | htab->local_ifunc_resolver = 1; | |
14749 | else if (is_static_defined (&h->elf)) | |
14750 | htab->maybe_local_ifunc_resolver = 1; | |
14751 | } | |
f0158f44 AM |
14752 | else if (indx != 0 |
14753 | || (bfd_link_pic (info) | |
14754 | && (h == NULL | |
21d68fcd | 14755 | || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf) |
f0158f44 | 14756 | || (tls_type == (TLS_TLS | TLS_LD) |
f15d0b54 AM |
14757 | && !h->elf.def_dynamic)) |
14758 | && !(tls_type == (TLS_TLS | TLS_TPREL) | |
14759 | && bfd_link_executable (info) | |
14760 | && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))) | |
19e08130 | 14761 | relgot = ppc64_elf_tdata (ent->owner)->relgot; |
25f23106 | 14762 | if (relgot != NULL) |
5bd4f169 | 14763 | { |
e717da7e AM |
14764 | outrel.r_offset = (got->output_section->vma |
14765 | + got->output_offset | |
411e1bfb | 14766 | + off); |
4cc603a5 | 14767 | outrel.r_addend = addend; |
d881513a | 14768 | if (tls_type & (TLS_LD | TLS_GD)) |
5bd4f169 | 14769 | { |
411e1bfb | 14770 | outrel.r_addend = 0; |
e515b051 | 14771 | outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64); |
d881513a AM |
14772 | if (tls_type == (TLS_TLS | TLS_GD)) |
14773 | { | |
e717da7e AM |
14774 | loc = relgot->contents; |
14775 | loc += (relgot->reloc_count++ | |
d881513a AM |
14776 | * sizeof (Elf64_External_Rela)); |
14777 | bfd_elf64_swap_reloca_out (output_bfd, | |
14778 | &outrel, loc); | |
e515b051 | 14779 | outrel.r_offset += 8; |
4cc603a5 | 14780 | outrel.r_addend = addend; |
d881513a AM |
14781 | outrel.r_info |
14782 | = ELF64_R_INFO (indx, R_PPC64_DTPREL64); | |
d881513a | 14783 | } |
411e1bfb | 14784 | } |
951fd09b | 14785 | else if (tls_type == (TLS_TLS | TLS_DTPREL)) |
411e1bfb | 14786 | outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64); |
951fd09b | 14787 | else if (tls_type == (TLS_TLS | TLS_TPREL)) |
411e1bfb | 14788 | outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64); |
25f23106 AM |
14789 | else if (indx != 0) |
14790 | outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT); | |
14791 | else | |
81407a69 | 14792 | { |
25f23106 AM |
14793 | if (ifunc) |
14794 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); | |
14795 | else | |
14796 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); | |
81407a69 AM |
14797 | |
14798 | /* Write the .got section contents for the sake | |
14799 | of prelink. */ | |
e717da7e | 14800 | loc = got->contents + off; |
23fbd6fa JJ |
14801 | bfd_put_64 (output_bfd, outrel.r_addend + relocation, |
14802 | loc); | |
81407a69 | 14803 | } |
81407a69 AM |
14804 | |
14805 | if (indx == 0 && tls_type != (TLS_TLS | TLS_LD)) | |
e515b051 AM |
14806 | { |
14807 | outrel.r_addend += relocation; | |
14808 | if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL)) | |
989f9879 AM |
14809 | { |
14810 | if (htab->elf.tls_sec == NULL) | |
14811 | outrel.r_addend = 0; | |
14812 | else | |
14813 | outrel.r_addend -= htab->elf.tls_sec->vma; | |
14814 | } | |
e515b051 | 14815 | } |
e717da7e AM |
14816 | loc = relgot->contents; |
14817 | loc += (relgot->reloc_count++ | |
411e1bfb AM |
14818 | * sizeof (Elf64_External_Rela)); |
14819 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
14820 | } | |
14821 | ||
ad8e1ba5 | 14822 | /* Init the .got section contents here if we're not |
81407a69 | 14823 | emitting a reloc. */ |
d881513a | 14824 | else |
411e1bfb | 14825 | { |
4cc603a5 | 14826 | relocation += addend; |
f0158f44 | 14827 | if (tls_type != 0) |
411e1bfb | 14828 | { |
989f9879 AM |
14829 | if (htab->elf.tls_sec == NULL) |
14830 | relocation = 0; | |
14831 | else | |
14832 | { | |
f0158f44 AM |
14833 | if (tls_type & TLS_LD) |
14834 | relocation = 0; | |
14835 | else | |
14836 | relocation -= htab->elf.tls_sec->vma + DTP_OFFSET; | |
676ee2b5 | 14837 | if (tls_type & TLS_TPREL) |
989f9879 AM |
14838 | relocation += DTP_OFFSET - TP_OFFSET; |
14839 | } | |
5bd4f169 | 14840 | |
f0158f44 | 14841 | if (tls_type & (TLS_GD | TLS_LD)) |
7b609f53 AM |
14842 | { |
14843 | bfd_put_64 (output_bfd, relocation, | |
e717da7e | 14844 | got->contents + off + 8); |
676ee2b5 | 14845 | relocation = 1; |
7b609f53 | 14846 | } |
411e1bfb AM |
14847 | } |
14848 | bfd_put_64 (output_bfd, relocation, | |
e717da7e | 14849 | got->contents + off); |
5bd4f169 AM |
14850 | } |
14851 | } | |
14852 | ||
65f38f15 AM |
14853 | if (off >= (bfd_vma) -2) |
14854 | abort (); | |
14855 | ||
bf102f86 | 14856 | relocation = got->output_section->vma + got->output_offset + off; |
6f20ed8a | 14857 | addend = -(TOCstart + htab->sec_info[input_section->id].toc_off); |
5bd4f169 | 14858 | } |
65f38f15 AM |
14859 | break; |
14860 | ||
14861 | case R_PPC64_PLT16_HA: | |
14862 | case R_PPC64_PLT16_HI: | |
14863 | case R_PPC64_PLT16_LO: | |
08be3224 | 14864 | case R_PPC64_PLT16_LO_DS: |
65f38f15 AM |
14865 | case R_PPC64_PLT32: |
14866 | case R_PPC64_PLT64: | |
23cedd1d AM |
14867 | case R_PPC64_PLTSEQ: |
14868 | case R_PPC64_PLTCALL: | |
65f38f15 AM |
14869 | /* Relocation is to the entry for this symbol in the |
14870 | procedure linkage table. */ | |
23cedd1d | 14871 | unresolved_reloc = TRUE; |
cbf95972 AM |
14872 | { |
14873 | struct plt_entry **plt_list = NULL; | |
14874 | if (h != NULL) | |
14875 | plt_list = &h->elf.plt.plist; | |
14876 | else if (local_got_ents != NULL) | |
14877 | { | |
14878 | struct plt_entry **local_plt = (struct plt_entry **) | |
14879 | (local_got_ents + symtab_hdr->sh_info); | |
2d7ad24e | 14880 | plt_list = local_plt + r_symndx; |
cbf95972 AM |
14881 | } |
14882 | if (plt_list) | |
14883 | { | |
14884 | struct plt_entry *ent; | |
65f38f15 | 14885 | |
cbf95972 AM |
14886 | for (ent = *plt_list; ent != NULL; ent = ent->next) |
14887 | if (ent->plt.offset != (bfd_vma) -1 | |
14888 | && ent->addend == orig_rel.r_addend) | |
14889 | { | |
14890 | asection *plt; | |
08be3224 | 14891 | bfd_vma got; |
cbf95972 AM |
14892 | |
14893 | plt = htab->elf.splt; | |
14894 | if (!htab->elf.dynamic_sections_created | |
14895 | || h == NULL | |
14896 | || h->elf.dynindx == -1) | |
2d7ad24e AM |
14897 | { |
14898 | if (h != NULL | |
14899 | ? h->elf.type == STT_GNU_IFUNC | |
14900 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
14901 | plt = htab->elf.iplt; | |
14902 | else | |
14903 | plt = htab->pltlocal; | |
14904 | } | |
14905 | relocation = (plt->output_section->vma | |
14906 | + plt->output_offset | |
14907 | + ent->plt.offset); | |
08be3224 | 14908 | if (r_type == R_PPC64_PLT16_HA |
2cdcc330 AM |
14909 | || r_type == R_PPC64_PLT16_HI |
14910 | || r_type == R_PPC64_PLT16_LO | |
14911 | || r_type == R_PPC64_PLT16_LO_DS) | |
08be3224 AM |
14912 | { |
14913 | got = (elf_gp (output_bfd) | |
14914 | + htab->sec_info[input_section->id].toc_off); | |
14915 | relocation -= got; | |
14916 | } | |
cbf95972 AM |
14917 | addend = 0; |
14918 | unresolved_reloc = FALSE; | |
14919 | break; | |
14920 | } | |
14921 | } | |
14922 | } | |
65f38f15 | 14923 | break; |
5bd4f169 | 14924 | |
0b13192e AM |
14925 | case R_PPC64_TOC: |
14926 | /* Relocation value is TOC base. */ | |
14927 | relocation = TOCstart; | |
cf35638d | 14928 | if (r_symndx == STN_UNDEF) |
6f20ed8a | 14929 | relocation += htab->sec_info[input_section->id].toc_off; |
8517fae7 AM |
14930 | else if (unresolved_reloc) |
14931 | ; | |
6f20ed8a AM |
14932 | else if (sec != NULL && sec->id < htab->sec_info_arr_size) |
14933 | relocation += htab->sec_info[sec->id].toc_off; | |
0b13192e AM |
14934 | else |
14935 | unresolved_reloc = TRUE; | |
ab96bf03 | 14936 | goto dodyn; |
0b13192e | 14937 | |
5bd4f169 AM |
14938 | /* TOC16 relocs. We want the offset relative to the TOC base, |
14939 | which is the address of the start of the TOC plus 0x8000. | |
14940 | The TOC consists of sections .got, .toc, .tocbss, and .plt, | |
14941 | in this order. */ | |
65f38f15 AM |
14942 | case R_PPC64_TOC16: |
14943 | case R_PPC64_TOC16_LO: | |
14944 | case R_PPC64_TOC16_HI: | |
14945 | case R_PPC64_TOC16_DS: | |
14946 | case R_PPC64_TOC16_LO_DS: | |
14947 | case R_PPC64_TOC16_HA: | |
6f20ed8a | 14948 | addend -= TOCstart + htab->sec_info[input_section->id].toc_off; |
5bd4f169 AM |
14949 | break; |
14950 | ||
14951 | /* Relocate against the beginning of the section. */ | |
65f38f15 AM |
14952 | case R_PPC64_SECTOFF: |
14953 | case R_PPC64_SECTOFF_LO: | |
14954 | case R_PPC64_SECTOFF_HI: | |
14955 | case R_PPC64_SECTOFF_DS: | |
14956 | case R_PPC64_SECTOFF_LO_DS: | |
14957 | case R_PPC64_SECTOFF_HA: | |
4ce794b7 | 14958 | if (sec != NULL) |
65f38f15 | 14959 | addend -= sec->output_section->vma; |
5bd4f169 AM |
14960 | break; |
14961 | ||
25f23106 AM |
14962 | case R_PPC64_REL16: |
14963 | case R_PPC64_REL16_LO: | |
14964 | case R_PPC64_REL16_HI: | |
14965 | case R_PPC64_REL16_HA: | |
4a969973 AM |
14966 | case R_PPC64_REL16_HIGH: |
14967 | case R_PPC64_REL16_HIGHA: | |
14968 | case R_PPC64_REL16_HIGHER: | |
14969 | case R_PPC64_REL16_HIGHERA: | |
14970 | case R_PPC64_REL16_HIGHEST: | |
14971 | case R_PPC64_REL16_HIGHESTA: | |
a680de9a | 14972 | case R_PPC64_REL16DX_HA: |
25f23106 AM |
14973 | break; |
14974 | ||
721956f4 AM |
14975 | case R_PPC64_REL14: |
14976 | case R_PPC64_REL14_BRNTAKEN: | |
14977 | case R_PPC64_REL14_BRTAKEN: | |
5d1634d7 | 14978 | case R_PPC64_REL24: |
05d0e962 | 14979 | case R_PPC64_REL24_NOTOC: |
5d1634d7 AM |
14980 | break; |
14981 | ||
411e1bfb AM |
14982 | case R_PPC64_TPREL16: |
14983 | case R_PPC64_TPREL16_LO: | |
14984 | case R_PPC64_TPREL16_HI: | |
14985 | case R_PPC64_TPREL16_HA: | |
14986 | case R_PPC64_TPREL16_DS: | |
14987 | case R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
14988 | case R_PPC64_TPREL16_HIGH: |
14989 | case R_PPC64_TPREL16_HIGHA: | |
411e1bfb AM |
14990 | case R_PPC64_TPREL16_HIGHER: |
14991 | case R_PPC64_TPREL16_HIGHERA: | |
14992 | case R_PPC64_TPREL16_HIGHEST: | |
14993 | case R_PPC64_TPREL16_HIGHESTA: | |
766bc656 AM |
14994 | if (h != NULL |
14995 | && h->elf.root.type == bfd_link_hash_undefweak | |
14996 | && h->elf.dynindx == -1) | |
14997 | { | |
14998 | /* Make this relocation against an undefined weak symbol | |
14999 | resolve to zero. This is really just a tweak, since | |
15000 | code using weak externs ought to check that they are | |
15001 | defined before using them. */ | |
15002 | bfd_byte *p = contents + rel->r_offset - d_offset; | |
15003 | ||
95f0d0d2 | 15004 | insn = bfd_get_32 (input_bfd, p); |
766bc656 AM |
15005 | insn = _bfd_elf_ppc_at_tprel_transform (insn, 13); |
15006 | if (insn != 0) | |
95f0d0d2 | 15007 | bfd_put_32 (input_bfd, insn, p); |
766bc656 AM |
15008 | break; |
15009 | } | |
989f9879 AM |
15010 | if (htab->elf.tls_sec != NULL) |
15011 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; | |
7c8bbca5 AM |
15012 | /* The TPREL16 relocs shouldn't really be used in shared |
15013 | libs or with non-local symbols as that will result in | |
15014 | DT_TEXTREL being set, but support them anyway. */ | |
15015 | goto dodyn; | |
411e1bfb AM |
15016 | |
15017 | case R_PPC64_DTPREL16: | |
15018 | case R_PPC64_DTPREL16_LO: | |
15019 | case R_PPC64_DTPREL16_HI: | |
15020 | case R_PPC64_DTPREL16_HA: | |
15021 | case R_PPC64_DTPREL16_DS: | |
15022 | case R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
15023 | case R_PPC64_DTPREL16_HIGH: |
15024 | case R_PPC64_DTPREL16_HIGHA: | |
411e1bfb AM |
15025 | case R_PPC64_DTPREL16_HIGHER: |
15026 | case R_PPC64_DTPREL16_HIGHERA: | |
15027 | case R_PPC64_DTPREL16_HIGHEST: | |
15028 | case R_PPC64_DTPREL16_HIGHESTA: | |
989f9879 AM |
15029 | if (htab->elf.tls_sec != NULL) |
15030 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; | |
411e1bfb AM |
15031 | break; |
15032 | ||
45965137 AM |
15033 | case R_PPC64_ADDR64_LOCAL: |
15034 | addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL | |
15035 | ? h->elf.other | |
15036 | : sym->st_other); | |
15037 | break; | |
15038 | ||
e515b051 AM |
15039 | case R_PPC64_DTPMOD64: |
15040 | relocation = 1; | |
15041 | addend = 0; | |
15042 | goto dodyn; | |
15043 | ||
411e1bfb | 15044 | case R_PPC64_TPREL64: |
989f9879 AM |
15045 | if (htab->elf.tls_sec != NULL) |
15046 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; | |
411e1bfb AM |
15047 | goto dodyn; |
15048 | ||
15049 | case R_PPC64_DTPREL64: | |
989f9879 AM |
15050 | if (htab->elf.tls_sec != NULL) |
15051 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; | |
1a0670f3 | 15052 | /* Fall through. */ |
411e1bfb | 15053 | |
65f38f15 AM |
15054 | /* Relocations that may need to be propagated if this is a |
15055 | dynamic object. */ | |
04c9666a | 15056 | case R_PPC64_REL30: |
65f38f15 AM |
15057 | case R_PPC64_REL32: |
15058 | case R_PPC64_REL64: | |
15059 | case R_PPC64_ADDR14: | |
15060 | case R_PPC64_ADDR14_BRNTAKEN: | |
15061 | case R_PPC64_ADDR14_BRTAKEN: | |
15062 | case R_PPC64_ADDR16: | |
15063 | case R_PPC64_ADDR16_DS: | |
15064 | case R_PPC64_ADDR16_HA: | |
15065 | case R_PPC64_ADDR16_HI: | |
f9c6b907 AM |
15066 | case R_PPC64_ADDR16_HIGH: |
15067 | case R_PPC64_ADDR16_HIGHA: | |
65f38f15 AM |
15068 | case R_PPC64_ADDR16_HIGHER: |
15069 | case R_PPC64_ADDR16_HIGHERA: | |
15070 | case R_PPC64_ADDR16_HIGHEST: | |
15071 | case R_PPC64_ADDR16_HIGHESTA: | |
15072 | case R_PPC64_ADDR16_LO: | |
15073 | case R_PPC64_ADDR16_LO_DS: | |
15074 | case R_PPC64_ADDR24: | |
65f38f15 AM |
15075 | case R_PPC64_ADDR32: |
15076 | case R_PPC64_ADDR64: | |
15077 | case R_PPC64_UADDR16: | |
15078 | case R_PPC64_UADDR32: | |
15079 | case R_PPC64_UADDR64: | |
411e1bfb | 15080 | dodyn: |
5d1634d7 | 15081 | if ((input_section->flags & SEC_ALLOC) == 0) |
ec338859 AM |
15082 | break; |
15083 | ||
41bd81ab AM |
15084 | if (NO_OPD_RELOCS && is_opd) |
15085 | break; | |
15086 | ||
8a9e8e72 | 15087 | if (bfd_link_pic (info) |
b1b07054 AM |
15088 | ? ((h == NULL |
15089 | || h->dyn_relocs != NULL) | |
15090 | && ((h != NULL && pc_dynrelocs (h)) | |
15091 | || must_be_dyn_reloc (info, r_type))) | |
8a9e8e72 AM |
15092 | : (h != NULL |
15093 | ? h->dyn_relocs != NULL | |
d311bc8b | 15094 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)) |
65f38f15 | 15095 | { |
b34976b6 | 15096 | bfd_boolean skip, relocate; |
65f38f15 | 15097 | asection *sreloc; |
1cf1f670 | 15098 | bfd_vma out_off; |
82e66161 | 15099 | long indx = 0; |
65f38f15 AM |
15100 | |
15101 | /* When generating a dynamic object, these relocations | |
15102 | are copied into the output file to be resolved at run | |
15103 | time. */ | |
15104 | ||
b34976b6 AM |
15105 | skip = FALSE; |
15106 | relocate = FALSE; | |
65f38f15 | 15107 | |
1cf1f670 AM |
15108 | out_off = _bfd_elf_section_offset (output_bfd, info, |
15109 | input_section, rel->r_offset); | |
15110 | if (out_off == (bfd_vma) -1) | |
b34976b6 | 15111 | skip = TRUE; |
1cf1f670 | 15112 | else if (out_off == (bfd_vma) -2) |
b34976b6 | 15113 | skip = TRUE, relocate = TRUE; |
1cf1f670 AM |
15114 | out_off += (input_section->output_section->vma |
15115 | + input_section->output_offset); | |
15116 | outrel.r_offset = out_off; | |
411e1bfb | 15117 | outrel.r_addend = rel->r_addend; |
65f38f15 | 15118 | |
1cf1f670 AM |
15119 | /* Optimize unaligned reloc use. */ |
15120 | if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0) | |
15121 | || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0)) | |
15122 | r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64; | |
15123 | else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0) | |
15124 | || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0)) | |
15125 | r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32; | |
15126 | else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0) | |
15127 | || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0)) | |
15128 | r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16; | |
15129 | ||
65f38f15 | 15130 | if (skip) |
0bb2d96a | 15131 | memset (&outrel, 0, sizeof outrel); |
afe397ea | 15132 | else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf) |
0b13192e AM |
15133 | && !is_opd |
15134 | && r_type != R_PPC64_TOC) | |
14acf4dc | 15135 | { |
82e66161 AM |
15136 | indx = h->elf.dynindx; |
15137 | BFD_ASSERT (indx != -1); | |
15138 | outrel.r_info = ELF64_R_INFO (indx, r_type); | |
14acf4dc | 15139 | } |
65f38f15 AM |
15140 | else |
15141 | { | |
41bd81ab AM |
15142 | /* This symbol is local, or marked to become local, |
15143 | or this is an opd section reloc which must point | |
15144 | at a local function. */ | |
65f38f15 | 15145 | outrel.r_addend += relocation; |
e86ce104 | 15146 | if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) |
65f38f15 | 15147 | { |
3fad3c7c | 15148 | if (is_opd && h != NULL) |
afbe61cf AM |
15149 | { |
15150 | /* Lie about opd entries. This case occurs | |
15151 | when building shared libraries and we | |
15152 | reference a function in another shared | |
3fad3c7c AM |
15153 | lib. The same thing happens for a weak |
15154 | definition in an application that's | |
15155 | overridden by a strong definition in a | |
15156 | shared lib. (I believe this is a generic | |
15157 | bug in binutils handling of weak syms.) | |
15158 | In these cases we won't use the opd | |
1e2f5b6e | 15159 | entry in this lib. */ |
b34976b6 | 15160 | unresolved_reloc = FALSE; |
afbe61cf | 15161 | } |
25f23106 AM |
15162 | if (!is_opd |
15163 | && r_type == R_PPC64_ADDR64 | |
15164 | && (h != NULL | |
15165 | ? h->elf.type == STT_GNU_IFUNC | |
15166 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)) | |
15167 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); | |
15168 | else | |
15169 | { | |
15170 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); | |
81407a69 | 15171 | |
25f23106 AM |
15172 | /* We need to relocate .opd contents for ld.so. |
15173 | Prelink also wants simple and consistent rules | |
15174 | for relocs. This make all RELATIVE relocs have | |
15175 | *r_offset equal to r_addend. */ | |
15176 | relocate = TRUE; | |
15177 | } | |
65f38f15 AM |
15178 | } |
15179 | else | |
15180 | { | |
25f23106 AM |
15181 | if (h != NULL |
15182 | ? h->elf.type == STT_GNU_IFUNC | |
15183 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
15184 | { | |
25f53a85 | 15185 | info->callbacks->einfo |
695344c0 | 15186 | /* xgettext:c-format */ |
174d0a74 | 15187 | (_("%H: %s for indirect " |
c1c8c1ef | 15188 | "function `%pT' unsupported\n"), |
25f53a85 | 15189 | input_bfd, input_section, rel->r_offset, |
25f23106 AM |
15190 | ppc64_elf_howto_table[r_type]->name, |
15191 | sym_name); | |
15192 | ret = FALSE; | |
15193 | } | |
cf35638d | 15194 | else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) |
65f38f15 AM |
15195 | ; |
15196 | else if (sec == NULL || sec->owner == NULL) | |
15197 | { | |
15198 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 15199 | return FALSE; |
65f38f15 AM |
15200 | } |
15201 | else | |
15202 | { | |
15203 | asection *osec; | |
15204 | ||
15205 | osec = sec->output_section; | |
15206 | indx = elf_section_data (osec)->dynindx; | |
15207 | ||
74541ad4 AM |
15208 | if (indx == 0) |
15209 | { | |
15210 | if ((osec->flags & SEC_READONLY) == 0 | |
15211 | && htab->elf.data_index_section != NULL) | |
15212 | osec = htab->elf.data_index_section; | |
15213 | else | |
15214 | osec = htab->elf.text_index_section; | |
15215 | indx = elf_section_data (osec)->dynindx; | |
15216 | } | |
15217 | BFD_ASSERT (indx != 0); | |
15218 | ||
65f38f15 AM |
15219 | /* We are turning this relocation into one |
15220 | against a section symbol, so subtract out | |
15221 | the output section's address but not the | |
15222 | offset of the input section in the output | |
15223 | section. */ | |
15224 | outrel.r_addend -= osec->vma; | |
15225 | } | |
15226 | ||
15227 | outrel.r_info = ELF64_R_INFO (indx, r_type); | |
15228 | } | |
15229 | } | |
15230 | ||
15231 | sreloc = elf_section_data (input_section)->sreloc; | |
19e08130 AM |
15232 | if (h != NULL |
15233 | ? h->elf.type == STT_GNU_IFUNC | |
15234 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
82e66161 AM |
15235 | { |
15236 | sreloc = htab->elf.irelplt; | |
15237 | if (indx == 0) | |
15238 | htab->local_ifunc_resolver = 1; | |
15239 | else if (is_static_defined (&h->elf)) | |
15240 | htab->maybe_local_ifunc_resolver = 1; | |
15241 | } | |
65f38f15 AM |
15242 | if (sreloc == NULL) |
15243 | abort (); | |
15244 | ||
dfbb6ac9 AM |
15245 | if (sreloc->reloc_count * sizeof (Elf64_External_Rela) |
15246 | >= sreloc->size) | |
15247 | abort (); | |
947216bf AM |
15248 | loc = sreloc->contents; |
15249 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
65f38f15 AM |
15250 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
15251 | ||
15252 | /* If this reloc is against an external symbol, it will | |
15253 | be computed at runtime, so there's no need to do | |
81407a69 AM |
15254 | anything now. However, for the sake of prelink ensure |
15255 | that the section contents are a known value. */ | |
2cdcc330 | 15256 | if (!relocate) |
81407a69 AM |
15257 | { |
15258 | unresolved_reloc = FALSE; | |
15259 | /* The value chosen here is quite arbitrary as ld.so | |
15260 | ignores section contents except for the special | |
15261 | case of .opd where the contents might be accessed | |
15262 | before relocation. Choose zero, as that won't | |
15263 | cause reloc overflow. */ | |
15264 | relocation = 0; | |
15265 | addend = 0; | |
15266 | /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs | |
15267 | to improve backward compatibility with older | |
15268 | versions of ld. */ | |
15269 | if (r_type == R_PPC64_ADDR64) | |
15270 | addend = outrel.r_addend; | |
15271 | /* Adjust pc_relative relocs to have zero in *r_offset. */ | |
4ce794b7 | 15272 | else if (ppc64_elf_howto_table[r_type]->pc_relative) |
f0158f44 | 15273 | addend = outrel.r_offset; |
81407a69 | 15274 | } |
65f38f15 | 15275 | } |
5bd4f169 AM |
15276 | break; |
15277 | ||
65f38f15 AM |
15278 | case R_PPC64_COPY: |
15279 | case R_PPC64_GLOB_DAT: | |
15280 | case R_PPC64_JMP_SLOT: | |
25f23106 | 15281 | case R_PPC64_JMP_IREL: |
65f38f15 AM |
15282 | case R_PPC64_RELATIVE: |
15283 | /* We shouldn't ever see these dynamic relocs in relocatable | |
15284 | files. */ | |
ae9a127f | 15285 | /* Fall through. */ |
65f38f15 AM |
15286 | |
15287 | case R_PPC64_PLTGOT16: | |
15288 | case R_PPC64_PLTGOT16_DS: | |
15289 | case R_PPC64_PLTGOT16_HA: | |
15290 | case R_PPC64_PLTGOT16_HI: | |
15291 | case R_PPC64_PLTGOT16_LO: | |
15292 | case R_PPC64_PLTGOT16_LO_DS: | |
15293 | case R_PPC64_PLTREL32: | |
15294 | case R_PPC64_PLTREL64: | |
15295 | /* These ones haven't been implemented yet. */ | |
15296 | ||
25f53a85 | 15297 | info->callbacks->einfo |
695344c0 | 15298 | /* xgettext:c-format */ |
c1c8c1ef | 15299 | (_("%P: %pB: %s is not supported for `%pT'\n"), |
d003868e | 15300 | input_bfd, |
4ce794b7 | 15301 | ppc64_elf_howto_table[r_type]->name, sym_name); |
5bd4f169 AM |
15302 | |
15303 | bfd_set_error (bfd_error_invalid_operation); | |
b34976b6 | 15304 | ret = FALSE; |
c316a17c | 15305 | goto copy_reloc; |
65f38f15 | 15306 | } |
5bd4f169 | 15307 | |
67f0cbdb AM |
15308 | /* Multi-instruction sequences that access the TOC can be |
15309 | optimized, eg. addis ra,r2,0; addi rb,ra,x; | |
07d6d2b8 | 15310 | to nop; addi rb,r2,x; */ |
67f0cbdb AM |
15311 | switch (r_type) |
15312 | { | |
15313 | default: | |
15314 | break; | |
15315 | ||
15316 | case R_PPC64_GOT_TLSLD16_HI: | |
15317 | case R_PPC64_GOT_TLSGD16_HI: | |
15318 | case R_PPC64_GOT_TPREL16_HI: | |
15319 | case R_PPC64_GOT_DTPREL16_HI: | |
15320 | case R_PPC64_GOT16_HI: | |
15321 | case R_PPC64_TOC16_HI: | |
15322 | /* These relocs would only be useful if building up an | |
15323 | offset to later add to r2, perhaps in an indexed | |
15324 | addressing mode instruction. Don't try to optimize. | |
15325 | Unfortunately, the possibility of someone building up an | |
15326 | offset like this or even with the HA relocs, means that | |
15327 | we need to check the high insn when optimizing the low | |
15328 | insn. */ | |
15329 | break; | |
15330 | ||
23cedd1d AM |
15331 | case R_PPC64_PLTCALL: |
15332 | if (unresolved_reloc) | |
15333 | { | |
15334 | /* No plt entry. Make this into a direct call. */ | |
15335 | bfd_byte *p = contents + rel->r_offset; | |
15336 | insn = bfd_get_32 (input_bfd, p); | |
15337 | insn &= 1; | |
15338 | bfd_put_32 (input_bfd, B_DOT | insn, p); | |
15339 | bfd_put_32 (input_bfd, NOP, p + 4); | |
15340 | unresolved_reloc = save_unresolved_reloc; | |
15341 | r_type = R_PPC64_REL24; | |
15342 | } | |
15343 | break; | |
15344 | ||
15345 | case R_PPC64_PLTSEQ: | |
15346 | if (unresolved_reloc) | |
15347 | { | |
15348 | unresolved_reloc = FALSE; | |
15349 | goto nop_it; | |
15350 | } | |
15351 | break; | |
15352 | ||
15353 | case R_PPC64_PLT16_HA: | |
15354 | if (unresolved_reloc) | |
15355 | { | |
15356 | unresolved_reloc = FALSE; | |
15357 | goto nop_it; | |
15358 | } | |
15359 | /* Fall through. */ | |
67f0cbdb AM |
15360 | case R_PPC64_GOT_TLSLD16_HA: |
15361 | case R_PPC64_GOT_TLSGD16_HA: | |
15362 | case R_PPC64_GOT_TPREL16_HA: | |
15363 | case R_PPC64_GOT_DTPREL16_HA: | |
15364 | case R_PPC64_GOT16_HA: | |
15365 | case R_PPC64_TOC16_HA: | |
98528052 | 15366 | if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000 |
560c8763 | 15367 | && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn) |
98528052 | 15368 | { |
23cedd1d AM |
15369 | bfd_byte *p; |
15370 | nop_it: | |
15371 | p = contents + (rel->r_offset & ~3); | |
98528052 | 15372 | bfd_put_32 (input_bfd, NOP, p); |
d830549d | 15373 | goto copy_reloc; |
98528052 | 15374 | } |
67f0cbdb AM |
15375 | break; |
15376 | ||
23cedd1d AM |
15377 | case R_PPC64_PLT16_LO: |
15378 | case R_PPC64_PLT16_LO_DS: | |
15379 | if (unresolved_reloc) | |
15380 | { | |
15381 | unresolved_reloc = FALSE; | |
15382 | goto nop_it; | |
15383 | } | |
15384 | /* Fall through. */ | |
67f0cbdb AM |
15385 | case R_PPC64_GOT_TLSLD16_LO: |
15386 | case R_PPC64_GOT_TLSGD16_LO: | |
15387 | case R_PPC64_GOT_TPREL16_LO_DS: | |
15388 | case R_PPC64_GOT_DTPREL16_LO_DS: | |
15389 | case R_PPC64_GOT16_LO: | |
15390 | case R_PPC64_GOT16_LO_DS: | |
15391 | case R_PPC64_TOC16_LO: | |
15392 | case R_PPC64_TOC16_LO_DS: | |
98528052 | 15393 | if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000 |
560c8763 | 15394 | && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn) |
67f0cbdb AM |
15395 | { |
15396 | bfd_byte *p = contents + (rel->r_offset & ~3); | |
15397 | insn = bfd_get_32 (input_bfd, p); | |
560c8763 AM |
15398 | if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) |
15399 | { | |
15400 | /* Transform addic to addi when we change reg. */ | |
15401 | insn &= ~((0x3f << 26) | (0x1f << 16)); | |
15402 | insn |= (14u << 26) | (2 << 16); | |
15403 | } | |
15404 | else | |
67f0cbdb | 15405 | { |
98528052 AM |
15406 | insn &= ~(0x1f << 16); |
15407 | insn |= 2 << 16; | |
67f0cbdb | 15408 | } |
560c8763 | 15409 | bfd_put_32 (input_bfd, insn, p); |
67f0cbdb AM |
15410 | } |
15411 | break; | |
9a23f96e AM |
15412 | |
15413 | case R_PPC64_TPREL16_HA: | |
15414 | if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000) | |
15415 | { | |
15416 | bfd_byte *p = contents + (rel->r_offset & ~3); | |
15417 | insn = bfd_get_32 (input_bfd, p); | |
15418 | if ((insn & ((0x3f << 26) | 0x1f << 16)) | |
15419 | != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */) | |
15420 | /* xgettext:c-format */ | |
15421 | info->callbacks->minfo | |
15422 | (_("%H: warning: %s unexpected insn %#x.\n"), | |
d830549d AM |
15423 | input_bfd, input_section, rel->r_offset, |
15424 | ppc64_elf_howto_table[r_type]->name, insn); | |
9a23f96e | 15425 | else |
d830549d AM |
15426 | { |
15427 | bfd_put_32 (input_bfd, NOP, p); | |
15428 | goto copy_reloc; | |
15429 | } | |
9a23f96e AM |
15430 | } |
15431 | break; | |
15432 | ||
15433 | case R_PPC64_TPREL16_LO: | |
15434 | case R_PPC64_TPREL16_LO_DS: | |
15435 | if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000) | |
15436 | { | |
15437 | bfd_byte *p = contents + (rel->r_offset & ~3); | |
15438 | insn = bfd_get_32 (input_bfd, p); | |
15439 | insn &= ~(0x1f << 16); | |
15440 | insn |= 13 << 16; | |
15441 | bfd_put_32 (input_bfd, insn, p); | |
15442 | } | |
15443 | break; | |
67f0cbdb AM |
15444 | } |
15445 | ||
65f38f15 AM |
15446 | /* Do any further special processing. */ |
15447 | switch (r_type) | |
15448 | { | |
15449 | default: | |
15450 | break; | |
15451 | ||
25f23106 | 15452 | case R_PPC64_REL16_HA: |
4a969973 AM |
15453 | case R_PPC64_REL16_HIGHA: |
15454 | case R_PPC64_REL16_HIGHERA: | |
15455 | case R_PPC64_REL16_HIGHESTA: | |
a680de9a | 15456 | case R_PPC64_REL16DX_HA: |
f9c6b907 AM |
15457 | case R_PPC64_ADDR16_HA: |
15458 | case R_PPC64_ADDR16_HIGHA: | |
65f38f15 AM |
15459 | case R_PPC64_ADDR16_HIGHERA: |
15460 | case R_PPC64_ADDR16_HIGHESTA: | |
65f38f15 AM |
15461 | case R_PPC64_TOC16_HA: |
15462 | case R_PPC64_SECTOFF_HA: | |
411e1bfb | 15463 | case R_PPC64_TPREL16_HA: |
f9c6b907 | 15464 | case R_PPC64_TPREL16_HIGHA: |
411e1bfb | 15465 | case R_PPC64_TPREL16_HIGHERA: |
411e1bfb | 15466 | case R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
15467 | case R_PPC64_DTPREL16_HA: |
15468 | case R_PPC64_DTPREL16_HIGHA: | |
411e1bfb | 15469 | case R_PPC64_DTPREL16_HIGHERA: |
411e1bfb | 15470 | case R_PPC64_DTPREL16_HIGHESTA: |
65f38f15 AM |
15471 | /* It's just possible that this symbol is a weak symbol |
15472 | that's not actually defined anywhere. In that case, | |
15473 | 'sec' would be NULL, and we should leave the symbol | |
15474 | alone (it will be set to zero elsewhere in the link). */ | |
5c5f6e17 AM |
15475 | if (sec == NULL) |
15476 | break; | |
1a0670f3 | 15477 | /* Fall through. */ |
5c5f6e17 AM |
15478 | |
15479 | case R_PPC64_GOT16_HA: | |
15480 | case R_PPC64_PLTGOT16_HA: | |
15481 | case R_PPC64_PLT16_HA: | |
15482 | case R_PPC64_GOT_TLSGD16_HA: | |
15483 | case R_PPC64_GOT_TLSLD16_HA: | |
15484 | case R_PPC64_GOT_TPREL16_HA: | |
15485 | case R_PPC64_GOT_DTPREL16_HA: | |
15486 | /* Add 0x10000 if sign bit in 0:15 is set. | |
15487 | Bits 0:15 are not used. */ | |
15488 | addend += 0x8000; | |
65f38f15 AM |
15489 | break; |
15490 | ||
15491 | case R_PPC64_ADDR16_DS: | |
15492 | case R_PPC64_ADDR16_LO_DS: | |
15493 | case R_PPC64_GOT16_DS: | |
15494 | case R_PPC64_GOT16_LO_DS: | |
15495 | case R_PPC64_PLT16_LO_DS: | |
15496 | case R_PPC64_SECTOFF_DS: | |
15497 | case R_PPC64_SECTOFF_LO_DS: | |
15498 | case R_PPC64_TOC16_DS: | |
15499 | case R_PPC64_TOC16_LO_DS: | |
15500 | case R_PPC64_PLTGOT16_DS: | |
15501 | case R_PPC64_PLTGOT16_LO_DS: | |
411e1bfb AM |
15502 | case R_PPC64_GOT_TPREL16_DS: |
15503 | case R_PPC64_GOT_TPREL16_LO_DS: | |
15504 | case R_PPC64_GOT_DTPREL16_DS: | |
15505 | case R_PPC64_GOT_DTPREL16_LO_DS: | |
15506 | case R_PPC64_TPREL16_DS: | |
15507 | case R_PPC64_TPREL16_LO_DS: | |
15508 | case R_PPC64_DTPREL16_DS: | |
15509 | case R_PPC64_DTPREL16_LO_DS: | |
adadcc0c AM |
15510 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
15511 | mask = 3; | |
a680de9a PB |
15512 | /* If this reloc is against an lq, lxv, or stxv insn, then |
15513 | the value must be a multiple of 16. This is somewhat of | |
15514 | a hack, but the "correct" way to do this by defining _DQ | |
15515 | forms of all the _DS relocs bloats all reloc switches in | |
15516 | this file. It doesn't make much sense to use these | |
15517 | relocs in data, so testing the insn should be safe. */ | |
15518 | if ((insn & (0x3f << 26)) == (56u << 26) | |
15519 | || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1)) | |
adadcc0c | 15520 | mask = 15; |
a680de9a PB |
15521 | relocation += addend; |
15522 | addend = insn & (mask ^ 3); | |
15523 | if ((relocation & mask) != 0) | |
65f38f15 | 15524 | { |
a680de9a | 15525 | relocation ^= relocation & mask; |
25f53a85 | 15526 | info->callbacks->einfo |
695344c0 | 15527 | /* xgettext:c-format */ |
174d0a74 | 15528 | (_("%H: error: %s not a multiple of %u\n"), |
25f53a85 | 15529 | input_bfd, input_section, rel->r_offset, |
d830549d | 15530 | ppc64_elf_howto_table[r_type]->name, |
adadcc0c | 15531 | mask + 1); |
65f38f15 | 15532 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 15533 | ret = FALSE; |
c316a17c | 15534 | goto copy_reloc; |
65f38f15 AM |
15535 | } |
15536 | break; | |
5bd4f169 AM |
15537 | } |
15538 | ||
239e1f3a AM |
15539 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
15540 | because such sections are not SEC_ALLOC and thus ld.so will | |
15541 | not process them. */ | |
d830549d | 15542 | howto = ppc64_elf_howto_table[(int) r_type]; |
65f38f15 | 15543 | if (unresolved_reloc |
239e1f3a | 15544 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
15545 | && h->elf.def_dynamic) |
15546 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
15547 | rel->r_offset) != (bfd_vma) -1) | |
9c07fe7c | 15548 | { |
25f53a85 | 15549 | info->callbacks->einfo |
695344c0 | 15550 | /* xgettext:c-format */ |
c1c8c1ef | 15551 | (_("%H: unresolvable %s against `%pT'\n"), |
25f53a85 | 15552 | input_bfd, input_section, rel->r_offset, |
b80eed39 | 15553 | howto->name, |
039b3fef | 15554 | h->elf.root.root.string); |
b34976b6 | 15555 | ret = FALSE; |
9c07fe7c | 15556 | } |
5bd4f169 | 15557 | |
b80eed39 AM |
15558 | /* 16-bit fields in insns mostly have signed values, but a |
15559 | few insns have 16-bit unsigned values. Really, we should | |
15560 | have different reloc types. */ | |
15561 | if (howto->complain_on_overflow != complain_overflow_dont | |
15562 | && howto->dst_mask == 0xffff | |
15563 | && (input_section->flags & SEC_CODE) != 0) | |
15564 | { | |
15565 | enum complain_overflow complain = complain_overflow_signed; | |
15566 | ||
15567 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); | |
a47622ac AM |
15568 | if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) |
15569 | complain = complain_overflow_bitfield; | |
15570 | else if (howto->rightshift == 0 | |
15571 | ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */ | |
15572 | || (insn & (0x3f << 26)) == 24u << 26 /* ori */ | |
15573 | || (insn & (0x3f << 26)) == 26u << 26 /* xori */) | |
15574 | : ((insn & (0x3f << 26)) == 29u << 26 /* andis */ | |
15575 | || (insn & (0x3f << 26)) == 25u << 26 /* oris */ | |
15576 | || (insn & (0x3f << 26)) == 27u << 26 /* xoris */)) | |
b80eed39 AM |
15577 | complain = complain_overflow_unsigned; |
15578 | if (howto->complain_on_overflow != complain) | |
15579 | { | |
15580 | alt_howto = *howto; | |
15581 | alt_howto.complain_on_overflow = complain; | |
15582 | howto = &alt_howto; | |
15583 | } | |
15584 | } | |
15585 | ||
a680de9a PB |
15586 | if (r_type == R_PPC64_REL16DX_HA) |
15587 | { | |
15588 | /* Split field reloc isn't handled by _bfd_final_link_relocate. */ | |
15589 | if (rel->r_offset + 4 > input_section->size) | |
15590 | r = bfd_reloc_outofrange; | |
15591 | else | |
15592 | { | |
15593 | relocation += addend; | |
15594 | relocation -= (rel->r_offset | |
15595 | + input_section->output_offset | |
15596 | + input_section->output_section->vma); | |
3de43e7b | 15597 | relocation = (bfd_signed_vma) relocation >> 16; |
a680de9a PB |
15598 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
15599 | insn &= ~0x1fffc1; | |
3de43e7b | 15600 | insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15); |
a680de9a PB |
15601 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
15602 | r = bfd_reloc_ok; | |
3de43e7b | 15603 | if (relocation + 0x8000 > 0xffff) |
a680de9a PB |
15604 | r = bfd_reloc_overflow; |
15605 | } | |
15606 | } | |
15607 | else | |
15608 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, | |
15609 | rel->r_offset, relocation, addend); | |
5bd4f169 | 15610 | |
ef60b7ff | 15611 | if (r != bfd_reloc_ok) |
5bd4f169 | 15612 | { |
bc30df16 | 15613 | char *more_info = NULL; |
b80eed39 | 15614 | const char *reloc_name = howto->name; |
bc30df16 AM |
15615 | |
15616 | if (reloc_dest != DEST_NORMAL) | |
15617 | { | |
15618 | more_info = bfd_malloc (strlen (reloc_name) + 8); | |
15619 | if (more_info != NULL) | |
15620 | { | |
15621 | strcpy (more_info, reloc_name); | |
15622 | strcat (more_info, (reloc_dest == DEST_OPD | |
15623 | ? " (OPD)" : " (stub)")); | |
15624 | reloc_name = more_info; | |
15625 | } | |
15626 | } | |
15627 | ||
cd27b276 | 15628 | if (r == bfd_reloc_overflow) |
5bd4f169 | 15629 | { |
8131c122 AM |
15630 | /* On code like "if (foo) foo();" don't report overflow |
15631 | on a branch to zero when foo is undefined. */ | |
15632 | if (!warned | |
15633 | && (reloc_dest == DEST_STUB | |
15634 | || !(h != NULL | |
15635 | && (h->elf.root.type == bfd_link_hash_undefweak | |
15636 | || h->elf.root.type == bfd_link_hash_undefined) | |
15637 | && is_branch_reloc (r_type)))) | |
1a72702b AM |
15638 | info->callbacks->reloc_overflow (info, &h->elf.root, |
15639 | sym_name, reloc_name, | |
15640 | orig_rel.r_addend, | |
15641 | input_bfd, input_section, | |
15642 | rel->r_offset); | |
ef60b7ff AM |
15643 | } |
15644 | else | |
15645 | { | |
25f53a85 | 15646 | info->callbacks->einfo |
695344c0 | 15647 | /* xgettext:c-format */ |
c1c8c1ef | 15648 | (_("%H: %s against `%pT': error %d\n"), |
25f53a85 | 15649 | input_bfd, input_section, rel->r_offset, |
bc30df16 | 15650 | reloc_name, sym_name, (int) r); |
b34976b6 | 15651 | ret = FALSE; |
ef60b7ff | 15652 | } |
bc30df16 AM |
15653 | if (more_info != NULL) |
15654 | free (more_info); | |
5bd4f169 | 15655 | } |
c316a17c AM |
15656 | copy_reloc: |
15657 | if (wrel != rel) | |
15658 | *wrel = *rel; | |
15659 | } | |
15660 | ||
15661 | if (wrel != rel) | |
15662 | { | |
15663 | Elf_Internal_Shdr *rel_hdr; | |
15664 | size_t deleted = rel - wrel; | |
15665 | ||
15666 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
15667 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
15668 | if (rel_hdr->sh_size == 0) | |
15669 | { | |
15670 | /* It is too late to remove an empty reloc section. Leave | |
15671 | one NONE reloc. | |
15672 | ??? What is wrong with an empty section??? */ | |
15673 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
15674 | deleted -= 1; | |
15675 | } | |
15676 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
15677 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
15678 | input_section->reloc_count -= deleted; | |
5bd4f169 AM |
15679 | } |
15680 | ||
645ea6a9 AM |
15681 | /* If we're emitting relocations, then shortly after this function |
15682 | returns, reloc offsets and addends for this section will be | |
15683 | adjusted. Worse, reloc symbol indices will be for the output | |
8860955f AM |
15684 | file rather than the input. Save a copy of the relocs for |
15685 | opd_entry_value. */ | |
0e1862bb | 15686 | if (is_opd && (info->emitrelocations || bfd_link_relocatable (info))) |
8860955f AM |
15687 | { |
15688 | bfd_size_type amt; | |
15689 | amt = input_section->reloc_count * sizeof (Elf_Internal_Rela); | |
15690 | rel = bfd_alloc (input_bfd, amt); | |
729eabd5 AM |
15691 | BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL); |
15692 | ppc64_elf_tdata (input_bfd)->opd.relocs = rel; | |
8860955f AM |
15693 | if (rel == NULL) |
15694 | return FALSE; | |
15695 | memcpy (rel, relocs, amt); | |
15696 | } | |
5bd4f169 AM |
15697 | return ret; |
15698 | } | |
15699 | ||
754021d0 AM |
15700 | /* Adjust the value of any local symbols in opd sections. */ |
15701 | ||
6e0b88f1 | 15702 | static int |
754021d0 AM |
15703 | ppc64_elf_output_symbol_hook (struct bfd_link_info *info, |
15704 | const char *name ATTRIBUTE_UNUSED, | |
15705 | Elf_Internal_Sym *elfsym, | |
15706 | asection *input_sec, | |
15707 | struct elf_link_hash_entry *h) | |
15708 | { | |
74f0fb50 AM |
15709 | struct _opd_sec_data *opd; |
15710 | long adjust; | |
754021d0 AM |
15711 | bfd_vma value; |
15712 | ||
4025353c | 15713 | if (h != NULL) |
6e0b88f1 | 15714 | return 1; |
4025353c | 15715 | |
74f0fb50 AM |
15716 | opd = get_opd_info (input_sec); |
15717 | if (opd == NULL || opd->adjust == NULL) | |
6e0b88f1 | 15718 | return 1; |
754021d0 AM |
15719 | |
15720 | value = elfsym->st_value - input_sec->output_offset; | |
0e1862bb | 15721 | if (!bfd_link_relocatable (info)) |
754021d0 AM |
15722 | value -= input_sec->output_section->vma; |
15723 | ||
51aecdc5 | 15724 | adjust = opd->adjust[OPD_NDX (value)]; |
4025353c | 15725 | if (adjust == -1) |
6e0b88f1 AM |
15726 | return 2; |
15727 | ||
15728 | elfsym->st_value += adjust; | |
15729 | return 1; | |
754021d0 AM |
15730 | } |
15731 | ||
5bd4f169 AM |
15732 | /* Finish up dynamic symbol handling. We set the contents of various |
15733 | dynamic sections here. */ | |
15734 | ||
b34976b6 | 15735 | static bfd_boolean |
4ce794b7 AM |
15736 | ppc64_elf_finish_dynamic_symbol (bfd *output_bfd, |
15737 | struct bfd_link_info *info, | |
15738 | struct elf_link_hash_entry *h, | |
4aef7643 | 15739 | Elf_Internal_Sym *sym) |
5bd4f169 | 15740 | { |
65f38f15 | 15741 | struct ppc_link_hash_table *htab; |
8387904d | 15742 | struct plt_entry *ent; |
5bd4f169 | 15743 | |
65f38f15 | 15744 | htab = ppc_hash_table (info); |
4dfe6ac6 NC |
15745 | if (htab == NULL) |
15746 | return FALSE; | |
5bd4f169 | 15747 | |
49c09209 AM |
15748 | if (!htab->opd_abi && !h->def_regular) |
15749 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) | |
15750 | if (ent->plt.offset != (bfd_vma) -1) | |
15751 | { | |
15752 | /* Mark the symbol as undefined, rather than as | |
15753 | defined in glink. Leave the value if there were | |
15754 | any relocations where pointer equality matters | |
15755 | (this is a clue for the dynamic linker, to make | |
15756 | function pointer comparisons work between an | |
15757 | application and shared library), otherwise set it | |
15758 | to zero. */ | |
15759 | sym->st_shndx = SHN_UNDEF; | |
15760 | if (!h->pointer_equality_needed) | |
15761 | sym->st_value = 0; | |
15762 | else if (!h->ref_regular_nonweak) | |
15763 | { | |
15764 | /* This breaks function pointer comparisons, but | |
15765 | that is better than breaking tests for a NULL | |
15766 | function pointer. */ | |
15767 | sym->st_value = 0; | |
15768 | } | |
15769 | break; | |
15770 | } | |
5bd4f169 | 15771 | |
f5385ebf | 15772 | if (h->needs_copy) |
5bd4f169 | 15773 | { |
65f38f15 | 15774 | /* This symbol needs a copy reloc. Set it up. */ |
49c09209 | 15775 | Elf_Internal_Rela rela; |
5474d94f | 15776 | asection *srel; |
49c09209 | 15777 | bfd_byte *loc; |
5bd4f169 | 15778 | |
65f38f15 AM |
15779 | if (h->dynindx == -1 |
15780 | || (h->root.type != bfd_link_hash_defined | |
15781 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
15782 | || htab->elf.srelbss == NULL |
15783 | || htab->elf.sreldynrelro == NULL) | |
65f38f15 | 15784 | abort (); |
5bd4f169 AM |
15785 | |
15786 | rela.r_offset = (h->root.u.def.value | |
15787 | + h->root.u.def.section->output_section->vma | |
15788 | + h->root.u.def.section->output_offset); | |
15789 | rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY); | |
15790 | rela.r_addend = 0; | |
afbf7e8e | 15791 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
15792 | srel = htab->elf.sreldynrelro; |
15793 | else | |
15794 | srel = htab->elf.srelbss; | |
15795 | loc = srel->contents; | |
15796 | loc += srel->reloc_count++ * sizeof (Elf64_External_Rela); | |
65f38f15 | 15797 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
5bd4f169 AM |
15798 | } |
15799 | ||
b34976b6 | 15800 | return TRUE; |
5bd4f169 AM |
15801 | } |
15802 | ||
65f38f15 AM |
15803 | /* Used to decide how to sort relocs in an optimal manner for the |
15804 | dynamic linker, before writing them out. */ | |
15805 | ||
15806 | static enum elf_reloc_type_class | |
7e612e98 AM |
15807 | ppc64_elf_reloc_type_class (const struct bfd_link_info *info, |
15808 | const asection *rel_sec, | |
15809 | const Elf_Internal_Rela *rela) | |
65f38f15 | 15810 | { |
04c9666a | 15811 | enum elf_ppc64_reloc_type r_type; |
7e612e98 AM |
15812 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
15813 | ||
33e44f2e | 15814 | if (rel_sec == htab->elf.irelplt) |
7e612e98 | 15815 | return reloc_class_ifunc; |
a33d1f77 | 15816 | |
4ce794b7 | 15817 | r_type = ELF64_R_TYPE (rela->r_info); |
a33d1f77 | 15818 | switch (r_type) |
65f38f15 AM |
15819 | { |
15820 | case R_PPC64_RELATIVE: | |
15821 | return reloc_class_relative; | |
15822 | case R_PPC64_JMP_SLOT: | |
15823 | return reloc_class_plt; | |
15824 | case R_PPC64_COPY: | |
15825 | return reloc_class_copy; | |
15826 | default: | |
15827 | return reloc_class_normal; | |
15828 | } | |
15829 | } | |
15830 | ||
5bd4f169 AM |
15831 | /* Finish up the dynamic sections. */ |
15832 | ||
b34976b6 | 15833 | static bfd_boolean |
4ce794b7 AM |
15834 | ppc64_elf_finish_dynamic_sections (bfd *output_bfd, |
15835 | struct bfd_link_info *info) | |
5bd4f169 | 15836 | { |
65f38f15 AM |
15837 | struct ppc_link_hash_table *htab; |
15838 | bfd *dynobj; | |
5bd4f169 | 15839 | asection *sdyn; |
5bd4f169 | 15840 | |
65f38f15 | 15841 | htab = ppc_hash_table (info); |
4dfe6ac6 NC |
15842 | if (htab == NULL) |
15843 | return FALSE; | |
15844 | ||
65f38f15 | 15845 | dynobj = htab->elf.dynobj; |
3d4d4302 | 15846 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
5bd4f169 | 15847 | |
65f38f15 | 15848 | if (htab->elf.dynamic_sections_created) |
5bd4f169 | 15849 | { |
5bd4f169 AM |
15850 | Elf64_External_Dyn *dyncon, *dynconend; |
15851 | ||
33e44f2e | 15852 | if (sdyn == NULL || htab->elf.sgot == NULL) |
65f38f15 | 15853 | abort (); |
5bd4f169 AM |
15854 | |
15855 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
eea6121a | 15856 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
5bd4f169 AM |
15857 | for (; dyncon < dynconend; dyncon++) |
15858 | { | |
15859 | Elf_Internal_Dyn dyn; | |
19397422 | 15860 | asection *s; |
5bd4f169 AM |
15861 | |
15862 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
15863 | ||
15864 | switch (dyn.d_tag) | |
15865 | { | |
65f38f15 AM |
15866 | default: |
15867 | continue; | |
5bd4f169 | 15868 | |
5d1634d7 | 15869 | case DT_PPC64_GLINK: |
4ce794b7 | 15870 | s = htab->glink; |
6348e046 | 15871 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
ad8e1ba5 AM |
15872 | /* We stupidly defined DT_PPC64_GLINK to be the start |
15873 | of glink rather than the first entry point, which is | |
15874 | what ld.so needs, and now have a bigger stub to | |
15875 | support automatic multiple TOCs. */ | |
9e390558 | 15876 | dyn.d_un.d_ptr += GLINK_PLTRESOLVE_SIZE (htab) - 8 * 4; |
5d1634d7 AM |
15877 | break; |
15878 | ||
19397422 AM |
15879 | case DT_PPC64_OPD: |
15880 | s = bfd_get_section_by_name (output_bfd, ".opd"); | |
6348e046 AM |
15881 | if (s == NULL) |
15882 | continue; | |
15883 | dyn.d_un.d_ptr = s->vma; | |
19397422 AM |
15884 | break; |
15885 | ||
e8910a83 AM |
15886 | case DT_PPC64_OPT: |
15887 | if (htab->do_multi_toc && htab->multi_toc_needed) | |
15888 | dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC; | |
f378ab09 AM |
15889 | if (htab->has_plt_localentry0) |
15890 | dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY; | |
e8910a83 AM |
15891 | break; |
15892 | ||
19397422 AM |
15893 | case DT_PPC64_OPDSZ: |
15894 | s = bfd_get_section_by_name (output_bfd, ".opd"); | |
6348e046 AM |
15895 | if (s == NULL) |
15896 | continue; | |
eea6121a | 15897 | dyn.d_un.d_val = s->size; |
19397422 AM |
15898 | break; |
15899 | ||
65f38f15 | 15900 | case DT_PLTGOT: |
33e44f2e | 15901 | s = htab->elf.splt; |
6348e046 | 15902 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
65f38f15 AM |
15903 | break; |
15904 | ||
15905 | case DT_JMPREL: | |
33e44f2e | 15906 | s = htab->elf.srelplt; |
6348e046 | 15907 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
65f38f15 | 15908 | break; |
5bd4f169 | 15909 | |
65f38f15 | 15910 | case DT_PLTRELSZ: |
33e44f2e | 15911 | dyn.d_un.d_val = htab->elf.srelplt->size; |
5d1634d7 | 15912 | break; |
82e66161 AM |
15913 | |
15914 | case DT_TEXTREL: | |
15915 | if (htab->local_ifunc_resolver) | |
15916 | info->callbacks->einfo | |
15917 | (_("%X%P: text relocations and GNU indirect " | |
15918 | "functions will result in a segfault at runtime\n")); | |
15919 | else if (htab->maybe_local_ifunc_resolver) | |
15920 | info->callbacks->einfo | |
15921 | (_("%P: warning: text relocations and GNU indirect " | |
15922 | "functions may result in a segfault at runtime\n")); | |
15923 | continue; | |
5bd4f169 | 15924 | } |
5bd4f169 | 15925 | |
65f38f15 | 15926 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
5bd4f169 | 15927 | } |
5bd4f169 AM |
15928 | } |
15929 | ||
6528b6eb AM |
15930 | if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0 |
15931 | && htab->elf.sgot->output_section != bfd_abs_section_ptr) | |
5d1634d7 AM |
15932 | { |
15933 | /* Fill in the first entry in the global offset table. | |
15934 | We use it to hold the link-time TOCbase. */ | |
15935 | bfd_put_64 (output_bfd, | |
60ee0d4a | 15936 | elf_gp (output_bfd) + TOC_BASE_OFF, |
33e44f2e | 15937 | htab->elf.sgot->contents); |
5d1634d7 AM |
15938 | |
15939 | /* Set .got entry size. */ | |
2cdcc330 AM |
15940 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize |
15941 | = 8; | |
5d1634d7 AM |
15942 | } |
15943 | ||
6528b6eb AM |
15944 | if (htab->elf.splt != NULL && htab->elf.splt->size != 0 |
15945 | && htab->elf.splt->output_section != bfd_abs_section_ptr) | |
5d1634d7 AM |
15946 | { |
15947 | /* Set .plt entry size. */ | |
33e44f2e | 15948 | elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize |
b9e5796b | 15949 | = PLT_ENTRY_SIZE (htab); |
5d1634d7 AM |
15950 | } |
15951 | ||
84f5d08e AM |
15952 | /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for |
15953 | brlt ourselves if emitrelocations. */ | |
15954 | if (htab->brlt != NULL | |
15955 | && htab->brlt->reloc_count != 0 | |
15956 | && !_bfd_elf_link_output_relocs (output_bfd, | |
15957 | htab->brlt, | |
d4730f92 | 15958 | elf_section_data (htab->brlt)->rela.hdr, |
84f5d08e AM |
15959 | elf_section_data (htab->brlt)->relocs, |
15960 | NULL)) | |
15961 | return FALSE; | |
15962 | ||
176a0d42 AM |
15963 | if (htab->glink != NULL |
15964 | && htab->glink->reloc_count != 0 | |
15965 | && !_bfd_elf_link_output_relocs (output_bfd, | |
15966 | htab->glink, | |
d4730f92 | 15967 | elf_section_data (htab->glink)->rela.hdr, |
176a0d42 AM |
15968 | elf_section_data (htab->glink)->relocs, |
15969 | NULL)) | |
15970 | return FALSE; | |
15971 | ||
da44f4e5 | 15972 | |
df136d64 AM |
15973 | if (htab->glink_eh_frame != NULL |
15974 | && htab->glink_eh_frame->size != 0 | |
15975 | && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME | |
15976 | && !_bfd_elf_write_section_eh_frame (output_bfd, info, | |
15977 | htab->glink_eh_frame, | |
15978 | htab->glink_eh_frame->contents)) | |
15979 | return FALSE; | |
58d180e8 | 15980 | |
e717da7e | 15981 | /* We need to handle writing out multiple GOT sections ourselves, |
7b53ace3 AM |
15982 | since we didn't add them to DYNOBJ. We know dynobj is the first |
15983 | bfd. */ | |
c72f2fb2 | 15984 | while ((dynobj = dynobj->link.next) != NULL) |
e717da7e AM |
15985 | { |
15986 | asection *s; | |
7b53ace3 | 15987 | |
0c8d6e5c | 15988 | if (!is_ppc64_elf (dynobj)) |
7b53ace3 AM |
15989 | continue; |
15990 | ||
e717da7e AM |
15991 | s = ppc64_elf_tdata (dynobj)->got; |
15992 | if (s != NULL | |
eea6121a | 15993 | && s->size != 0 |
e717da7e AM |
15994 | && s->output_section != bfd_abs_section_ptr |
15995 | && !bfd_set_section_contents (output_bfd, s->output_section, | |
15996 | s->contents, s->output_offset, | |
eea6121a | 15997 | s->size)) |
e717da7e AM |
15998 | return FALSE; |
15999 | s = ppc64_elf_tdata (dynobj)->relgot; | |
16000 | if (s != NULL | |
eea6121a | 16001 | && s->size != 0 |
e717da7e AM |
16002 | && s->output_section != bfd_abs_section_ptr |
16003 | && !bfd_set_section_contents (output_bfd, s->output_section, | |
16004 | s->contents, s->output_offset, | |
eea6121a | 16005 | s->size)) |
e717da7e AM |
16006 | return FALSE; |
16007 | } | |
f6c52c13 | 16008 | |
b34976b6 | 16009 | return TRUE; |
5bd4f169 AM |
16010 | } |
16011 | ||
5bd4f169 | 16012 | #include "elf64-target.h" |
7b8e7dad AM |
16013 | |
16014 | /* FreeBSD support */ | |
16015 | ||
16016 | #undef TARGET_LITTLE_SYM | |
16017 | #undef TARGET_LITTLE_NAME | |
16018 | ||
16019 | #undef TARGET_BIG_SYM | |
6d00b590 | 16020 | #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec |
7b8e7dad AM |
16021 | #undef TARGET_BIG_NAME |
16022 | #define TARGET_BIG_NAME "elf64-powerpc-freebsd" | |
16023 | ||
16024 | #undef ELF_OSABI | |
16025 | #define ELF_OSABI ELFOSABI_FREEBSD | |
16026 | ||
16027 | #undef elf64_bed | |
16028 | #define elf64_bed elf64_powerpc_fbsd_bed | |
16029 | ||
16030 | #include "elf64-target.h" |