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PowerPC64 localentry:0 plt calls
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2017 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
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
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
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.
18
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.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
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 */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_want_dynrelro 1
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_dtrel_excludes_plt 1
80 #define elf_backend_default_execstack 0
81
82 #define bfd_elf64_mkobject ppc64_elf_mkobject
83 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
85 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
86 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
87 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
88 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
89 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
92
93 #define elf_backend_object_p ppc64_elf_object_p
94 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
95 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
96 #define elf_backend_write_core_note ppc64_elf_write_core_note
97 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
98 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
99 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
100 #define elf_backend_check_directives ppc64_elf_before_check_relocs
101 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
102 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
103 #define elf_backend_check_relocs ppc64_elf_check_relocs
104 #define elf_backend_gc_keep ppc64_elf_gc_keep
105 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
106 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
107 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
108 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
109 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
110 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
111 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
112 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
113 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
114 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
115 #define elf_backend_action_discarded ppc64_elf_action_discarded
116 #define elf_backend_relocate_section ppc64_elf_relocate_section
117 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
118 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
119 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
120 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
121 #define elf_backend_special_sections ppc64_elf_special_sections
122 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
123 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
124 #define elf_backend_get_reloc_section bfd_get_section_by_name
125
126 /* The name of the dynamic interpreter. This is put in the .interp
127 section. */
128 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
129
130 /* The size in bytes of an entry in the procedure linkage table. */
131 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
132
133 /* The initial size of the plt reserved for the dynamic linker. */
134 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
135
136 /* Offsets to some stack save slots. */
137 #define STK_LR 16
138 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
139 /* This one is dodgy. ELFv2 does not have a linker word, so use the
140 CR save slot. Used only by optimised __tls_get_addr call stub,
141 relying on __tls_get_addr_opt not saving CR.. */
142 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
143
144 /* TOC base pointers offset from start of TOC. */
145 #define TOC_BASE_OFF 0x8000
146 /* TOC base alignment. */
147 #define TOC_BASE_ALIGN 256
148
149 /* Offset of tp and dtp pointers from start of TLS block. */
150 #define TP_OFFSET 0x7000
151 #define DTP_OFFSET 0x8000
152
153 /* .plt call stub instructions. The normal stub is like this, but
154 sometimes the .plt entry crosses a 64k boundary and we need to
155 insert an addi to adjust r11. */
156 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
157 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
158 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
159 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
160 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
161 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
162 #define BCTR 0x4e800420 /* bctr */
163
164 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
165 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
166 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
167
168 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
169 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
170 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
171 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
172 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
173 #define BNECTR 0x4ca20420 /* bnectr+ */
174 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
175
176 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
177 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
178 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
179
180 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
181 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
182 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
183
184 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
185 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
186 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
187 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
188 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
189
190 /* glink call stub instructions. We enter with the index in R0. */
191 #define GLINK_CALL_STUB_SIZE (16*4)
192 /* 0: */
193 /* .quad plt0-1f */
194 /* __glink: */
195 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
196 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
197 /* 1: */
198 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
199 /* ld %2,(0b-1b)(%11) */
200 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
201 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
202 /* ld %12,0(%11) */
203 /* ld %2,8(%11) */
204 /* mtctr %12 */
205 /* ld %11,16(%11) */
206 /* bctr */
207 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
208 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
209 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
210 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
211 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
212
213 /* Pad with this. */
214 #define NOP 0x60000000
215
216 /* Some other nops. */
217 #define CROR_151515 0x4def7b82
218 #define CROR_313131 0x4ffffb82
219
220 /* .glink entries for the first 32k functions are two instructions. */
221 #define LI_R0_0 0x38000000 /* li %r0,0 */
222 #define B_DOT 0x48000000 /* b . */
223
224 /* After that, we need two instructions to load the index, followed by
225 a branch. */
226 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
227 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
228
229 /* Instructions used by the save and restore reg functions. */
230 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
231 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
232 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
233 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
234 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
235 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
236 #define LI_R12_0 0x39800000 /* li %r12,0 */
237 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
238 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
239 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
240 #define BLR 0x4e800020 /* blr */
241
242 /* Since .opd is an array of descriptors and each entry will end up
243 with identical R_PPC64_RELATIVE relocs, there is really no need to
244 propagate .opd relocs; The dynamic linker should be taught to
245 relocate .opd without reloc entries. */
246 #ifndef NO_OPD_RELOCS
247 #define NO_OPD_RELOCS 0
248 #endif
249
250 #ifndef ARRAY_SIZE
251 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
252 #endif
253
254 static inline int
255 abiversion (bfd *abfd)
256 {
257 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
258 }
259
260 static inline void
261 set_abiversion (bfd *abfd, int ver)
262 {
263 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
264 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
265 }
266 \f
267 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
268
269 /* Relocation HOWTO's. */
270 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
271
272 static reloc_howto_type ppc64_elf_howto_raw[] = {
273 /* This reloc does nothing. */
274 HOWTO (R_PPC64_NONE, /* type */
275 0, /* rightshift */
276 3, /* size (0 = byte, 1 = short, 2 = long) */
277 0, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_dont, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_NONE", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* A standard 32 bit relocation. */
289 HOWTO (R_PPC64_ADDR32, /* type */
290 0, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 32, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_bitfield, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_PPC64_ADDR32", /* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xffffffff, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 26 bit branch; the lower two bits must be zero.
304 FIXME: we don't check that, we just clear them. */
305 HOWTO (R_PPC64_ADDR24, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 26, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR24", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0x03fffffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A standard 16 bit relocation. */
320 HOWTO (R_PPC64_ADDR16, /* type */
321 0, /* rightshift */
322 1, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_bitfield, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* A 16 bit relocation without overflow. */
335 HOWTO (R_PPC64_ADDR16_LO, /* type */
336 0, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_dont,/* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_LO", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xffff, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* Bits 16-31 of an address. */
350 HOWTO (R_PPC64_ADDR16_HI, /* type */
351 16, /* rightshift */
352 1, /* size (0 = byte, 1 = short, 2 = long) */
353 16, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC64_ADDR16_HI", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0xffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
365 bits, treated as a signed number, is negative. */
366 HOWTO (R_PPC64_ADDR16_HA, /* type */
367 16, /* rightshift */
368 1, /* size (0 = byte, 1 = short, 2 = long) */
369 16, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_signed, /* complain_on_overflow */
373 ppc64_elf_ha_reloc, /* special_function */
374 "R_PPC64_ADDR16_HA", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* An absolute 16 bit branch; the lower two bits must be zero.
381 FIXME: we don't check that, we just clear them. */
382 HOWTO (R_PPC64_ADDR14, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 ppc64_elf_branch_reloc, /* special_function */
390 "R_PPC64_ADDR14", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x0000fffc, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* An absolute 16 bit branch, for which bit 10 should be set to
397 indicate that the branch is expected to be taken. The lower two
398 bits must be zero. */
399 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 FALSE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 ppc64_elf_brtaken_reloc, /* special_function */
407 "R_PPC64_ADDR14_BRTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0x0000fffc, /* dst_mask */
411 FALSE), /* pcrel_offset */
412
413 /* An absolute 16 bit branch, for which bit 10 should be set to
414 indicate that the branch is not expected to be taken. The lower
415 two bits must be zero. */
416 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 16, /* bitsize */
420 FALSE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_brtaken_reloc, /* special_function */
424 "R_PPC64_ADDR14_BRNTAKEN",/* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x0000fffc, /* dst_mask */
428 FALSE), /* pcrel_offset */
429
430 /* A relative 26 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL24, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 26, /* bitsize */
435 TRUE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_signed, /* complain_on_overflow */
438 ppc64_elf_branch_reloc, /* special_function */
439 "R_PPC64_REL24", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x03fffffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch; the lower two bits must be zero. */
446 HOWTO (R_PPC64_REL14, /* type */
447 0, /* rightshift */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
449 16, /* bitsize */
450 TRUE, /* pc_relative */
451 0, /* bitpos */
452 complain_overflow_signed, /* complain_on_overflow */
453 ppc64_elf_branch_reloc, /* special_function */
454 "R_PPC64_REL14", /* name */
455 FALSE, /* partial_inplace */
456 0, /* src_mask */
457 0x0000fffc, /* dst_mask */
458 TRUE), /* pcrel_offset */
459
460 /* A relative 16 bit branch. Bit 10 should be set to indicate that
461 the branch is expected to be taken. The lower two bits must be
462 zero. */
463 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
464 0, /* rightshift */
465 2, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 TRUE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_signed, /* complain_on_overflow */
470 ppc64_elf_brtaken_reloc, /* special_function */
471 "R_PPC64_REL14_BRTAKEN", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0x0000fffc, /* dst_mask */
475 TRUE), /* pcrel_offset */
476
477 /* A relative 16 bit branch. Bit 10 should be set to indicate that
478 the branch is not expected to be taken. The lower two bits must
479 be zero. */
480 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
481 0, /* rightshift */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
483 16, /* bitsize */
484 TRUE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_signed, /* complain_on_overflow */
487 ppc64_elf_brtaken_reloc, /* special_function */
488 "R_PPC64_REL14_BRNTAKEN",/* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0x0000fffc, /* dst_mask */
492 TRUE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
495 symbol. */
496 HOWTO (R_PPC64_GOT16, /* type */
497 0, /* rightshift */
498 1, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_signed, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GOT16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0xffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
511 the symbol. */
512 HOWTO (R_PPC64_GOT16_LO, /* type */
513 0, /* rightshift */
514 1, /* size (0 = byte, 1 = short, 2 = long) */
515 16, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_GOT16_LO", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
527 the symbol. */
528 HOWTO (R_PPC64_GOT16_HI, /* type */
529 16, /* rightshift */
530 1, /* size (0 = byte, 1 = short, 2 = long) */
531 16, /* bitsize */
532 FALSE, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_signed,/* complain_on_overflow */
535 ppc64_elf_unhandled_reloc, /* special_function */
536 "R_PPC64_GOT16_HI", /* name */
537 FALSE, /* partial_inplace */
538 0, /* src_mask */
539 0xffff, /* dst_mask */
540 FALSE), /* pcrel_offset */
541
542 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
543 the symbol. */
544 HOWTO (R_PPC64_GOT16_HA, /* type */
545 16, /* rightshift */
546 1, /* size (0 = byte, 1 = short, 2 = long) */
547 16, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_signed,/* complain_on_overflow */
551 ppc64_elf_unhandled_reloc, /* special_function */
552 "R_PPC64_GOT16_HA", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* This is used only by the dynamic linker. The symbol should exist
559 both in the object being run and in some shared library. The
560 dynamic linker copies the data addressed by the symbol from the
561 shared library into the object, because the object being
562 run has to have the data at some particular address. */
563 HOWTO (R_PPC64_COPY, /* type */
564 0, /* rightshift */
565 0, /* this one is variable size */
566 0, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_dont, /* complain_on_overflow */
570 ppc64_elf_unhandled_reloc, /* special_function */
571 "R_PPC64_COPY", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* Like R_PPC64_ADDR64, but used when setting global offset table
578 entries. */
579 HOWTO (R_PPC64_GLOB_DAT, /* type */
580 0, /* rightshift */
581 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
582 64, /* bitsize */
583 FALSE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_dont, /* complain_on_overflow */
586 ppc64_elf_unhandled_reloc, /* special_function */
587 "R_PPC64_GLOB_DAT", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 ONES (64), /* dst_mask */
591 FALSE), /* pcrel_offset */
592
593 /* Created by the link editor. Marks a procedure linkage table
594 entry for a symbol. */
595 HOWTO (R_PPC64_JMP_SLOT, /* type */
596 0, /* rightshift */
597 0, /* size (0 = byte, 1 = short, 2 = long) */
598 0, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_dont, /* complain_on_overflow */
602 ppc64_elf_unhandled_reloc, /* special_function */
603 "R_PPC64_JMP_SLOT", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 /* Used only by the dynamic linker. When the object is run, this
610 doubleword64 is set to the load address of the object, plus the
611 addend. */
612 HOWTO (R_PPC64_RELATIVE, /* type */
613 0, /* rightshift */
614 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
615 64, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_dont, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_RELATIVE", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 ONES (64), /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR32, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_UADDR32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffffffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* Like R_PPC64_ADDR16, but may be unaligned. */
642 HOWTO (R_PPC64_UADDR16, /* type */
643 0, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_UADDR16", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* 32-bit PC relative. */
657 HOWTO (R_PPC64_REL32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 TRUE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_signed, /* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 "R_PPC64_REL32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 TRUE), /* pcrel_offset */
670
671 /* 32-bit relocation to the symbol's procedure linkage table. */
672 HOWTO (R_PPC64_PLT32, /* type */
673 0, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 32, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_bitfield, /* complain_on_overflow */
679 ppc64_elf_unhandled_reloc, /* special_function */
680 "R_PPC64_PLT32", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffffffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
687 FIXME: R_PPC64_PLTREL32 not supported. */
688 HOWTO (R_PPC64_PLTREL32, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 32, /* bitsize */
692 TRUE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_signed, /* complain_on_overflow */
695 ppc64_elf_unhandled_reloc, /* special_function */
696 "R_PPC64_PLTREL32", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffffffff, /* dst_mask */
700 TRUE), /* pcrel_offset */
701
702 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
703 the symbol. */
704 HOWTO (R_PPC64_PLT16_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 ppc64_elf_unhandled_reloc, /* special_function */
712 "R_PPC64_PLT16_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
719 the symbol. */
720 HOWTO (R_PPC64_PLT16_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_signed, /* complain_on_overflow */
727 ppc64_elf_unhandled_reloc, /* special_function */
728 "R_PPC64_PLT16_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
735 the symbol. */
736 HOWTO (R_PPC64_PLT16_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_signed, /* complain_on_overflow */
743 ppc64_elf_unhandled_reloc, /* special_function */
744 "R_PPC64_PLT16_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit section relative relocation. */
751 HOWTO (R_PPC64_SECTOFF, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_signed, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Like R_PPC64_SECTOFF, but no overflow warning. */
766 HOWTO (R_PPC64_SECTOFF_LO, /* type */
767 0, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_LO", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HI, /* type */
782 16, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 ppc64_elf_sectoff_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HI", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* 16-bit upper half adjusted section relative relocation. */
796 HOWTO (R_PPC64_SECTOFF_HA, /* type */
797 16, /* rightshift */
798 1, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 FALSE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_signed, /* complain_on_overflow */
803 ppc64_elf_sectoff_ha_reloc, /* special_function */
804 "R_PPC64_SECTOFF_HA", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xffff, /* dst_mask */
808 FALSE), /* pcrel_offset */
809
810 /* Like R_PPC64_REL24 without touching the two least significant bits. */
811 HOWTO (R_PPC64_REL30, /* type */
812 2, /* rightshift */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
814 30, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_PPC64_REL30", /* name */
820 FALSE, /* partial_inplace */
821 0, /* src_mask */
822 0xfffffffc, /* dst_mask */
823 TRUE), /* pcrel_offset */
824
825 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
826
827 /* A standard 64-bit relocation. */
828 HOWTO (R_PPC64_ADDR64, /* type */
829 0, /* rightshift */
830 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
831 64, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC64_ADDR64", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 ONES (64), /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address. */
843 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
844 32, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_dont, /* complain_on_overflow */
850 bfd_elf_generic_reloc, /* special_function */
851 "R_PPC64_ADDR16_HIGHER", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* The bits 32-47 of an address, plus 1 if the contents of the low
858 16 bits, treated as a signed number, is negative. */
859 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
860 32, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 ppc64_elf_ha_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHERA", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* The bits 48-63 of an address. */
874 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
875 48, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_PPC64_ADDR16_HIGHEST", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* The bits 48-63 of an address, plus 1 if the contents of the low
889 16 bits, treated as a signed number, is negative. */
890 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
891 48, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc64_elf_ha_reloc, /* special_function */
898 "R_PPC64_ADDR16_HIGHESTA", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like ADDR64, but may be unaligned. */
905 HOWTO (R_PPC64_UADDR64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_UADDR64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* 64-bit relative relocation. */
920 HOWTO (R_PPC64_REL64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 TRUE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 bfd_elf_generic_reloc, /* special_function */
928 "R_PPC64_REL64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 TRUE), /* pcrel_offset */
933
934 /* 64-bit relocation to the symbol's procedure linkage table. */
935 HOWTO (R_PPC64_PLT64, /* type */
936 0, /* rightshift */
937 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
938 64, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_unhandled_reloc, /* special_function */
943 "R_PPC64_PLT64", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 ONES (64), /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 64-bit PC relative relocation to the symbol's procedure linkage
950 table. */
951 /* FIXME: R_PPC64_PLTREL64 not supported. */
952 HOWTO (R_PPC64_PLTREL64, /* type */
953 0, /* rightshift */
954 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
955 64, /* bitsize */
956 TRUE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_unhandled_reloc, /* special_function */
960 "R_PPC64_PLTREL64", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 ONES (64), /* dst_mask */
964 TRUE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation. */
967
968 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
969 HOWTO (R_PPC64_TOC16, /* type */
970 0, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_signed, /* complain_on_overflow */
976 ppc64_elf_toc_reloc, /* special_function */
977 "R_PPC64_TOC16", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 16 bit TOC-relative relocation without overflow. */
984
985 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
986 HOWTO (R_PPC64_TOC16_LO, /* type */
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc64_elf_toc_reloc, /* special_function */
994 "R_PPC64_TOC16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* 16 bit TOC-relative relocation, high 16 bits. */
1001
1002 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1003 HOWTO (R_PPC64_TOC16_HI, /* type */
1004 16, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_signed, /* complain_on_overflow */
1010 ppc64_elf_toc_reloc, /* special_function */
1011 "R_PPC64_TOC16_HI", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1018 contents of the low 16 bits, treated as a signed number, is
1019 negative. */
1020
1021 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1022 HOWTO (R_PPC64_TOC16_HA, /* type */
1023 16, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc64_elf_toc_ha_reloc, /* special_function */
1030 "R_PPC64_TOC16_HA", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1037
1038 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1039 HOWTO (R_PPC64_TOC, /* type */
1040 0, /* rightshift */
1041 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1042 64, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_toc64_reloc, /* special_function */
1047 "R_PPC64_TOC", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 ONES (64), /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_GOT16, but also informs the link editor that the
1054 value to relocate may (!) refer to a PLT entry which the link
1055 editor (a) may replace with the symbol value. If the link editor
1056 is unable to fully resolve the symbol, it may (b) create a PLT
1057 entry and store the address to the new PLT entry in the GOT.
1058 This permits lazy resolution of function symbols at run time.
1059 The link editor may also skip all of this and just (c) emit a
1060 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1061 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1062 HOWTO (R_PPC64_PLTGOT16, /* type */
1063 0, /* rightshift */
1064 1, /* size (0 = byte, 1 = short, 2 = long) */
1065 16, /* bitsize */
1066 FALSE, /* pc_relative */
1067 0, /* bitpos */
1068 complain_overflow_signed, /* complain_on_overflow */
1069 ppc64_elf_unhandled_reloc, /* special_function */
1070 "R_PPC64_PLTGOT16", /* name */
1071 FALSE, /* partial_inplace */
1072 0, /* src_mask */
1073 0xffff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1075
1076 /* Like R_PPC64_PLTGOT16, but without overflow. */
1077 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1078 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_unhandled_reloc, /* special_function */
1086 "R_PPC64_PLTGOT16_LO", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1093 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1094 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc64_elf_unhandled_reloc, /* special_function */
1102 "R_PPC64_PLTGOT16_HI", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1109 1 if the contents of the low 16 bits, treated as a signed number,
1110 is negative. */
1111 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1112 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1113 16, /* rightshift */
1114 1, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_signed, /* complain_on_overflow */
1119 ppc64_elf_unhandled_reloc, /* special_function */
1120 "R_PPC64_PLTGOT16_HA", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xffff, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_DS, /* type */
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_signed, /* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_DS", /* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_PPC64_ADDR16_LO_DS",/* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_signed, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc64_elf_unhandled_reloc, /* special_function */
1180 "R_PPC64_GOT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc64_elf_unhandled_reloc, /* special_function */
1195 "R_PPC64_PLT16_LO_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_signed, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_DS", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1218 0, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc64_elf_sectoff_reloc, /* special_function */
1225 "R_PPC64_SECTOFF_LO_DS",/* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_DS, /* type */
1233 0, /* rightshift */
1234 1, /* size (0 = byte, 1 = short, 2 = long) */
1235 16, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_signed, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1247 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1248 0, /* rightshift */
1249 1, /* size (0 = byte, 1 = short, 2 = long) */
1250 16, /* bitsize */
1251 FALSE, /* pc_relative */
1252 0, /* bitpos */
1253 complain_overflow_dont, /* complain_on_overflow */
1254 ppc64_elf_toc_reloc, /* special_function */
1255 "R_PPC64_TOC16_LO_DS", /* name */
1256 FALSE, /* partial_inplace */
1257 0, /* src_mask */
1258 0xfffc, /* dst_mask */
1259 FALSE), /* pcrel_offset */
1260
1261 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1262 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1263 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_signed, /* complain_on_overflow */
1270 ppc64_elf_unhandled_reloc, /* special_function */
1271 "R_PPC64_PLTGOT16_DS", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xfffc, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1278 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1279 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc64_elf_unhandled_reloc, /* special_function */
1287 "R_PPC64_PLTGOT16_LO_DS",/* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xfffc, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* Marker relocs for TLS. */
1294 HOWTO (R_PPC64_TLS,
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 32, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC64_TLS", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_PPC64_TLSGD,
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 32, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_PPC64_TLSGD", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 0, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 HOWTO (R_PPC64_TLSLD,
1323 0, /* rightshift */
1324 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 32, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_PPC64_TLSLD", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 HOWTO (R_PPC64_TOCSAVE,
1337 0, /* rightshift */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1339 32, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont, /* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_PPC64_TOCSAVE", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* Computes the load module index of the load module that contains the
1351 definition of its TLS sym. */
1352 HOWTO (R_PPC64_DTPMOD64,
1353 0, /* rightshift */
1354 4, /* size (0 = byte, 1 = short, 2 = long) */
1355 64, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_dont, /* complain_on_overflow */
1359 ppc64_elf_unhandled_reloc, /* special_function */
1360 "R_PPC64_DTPMOD64", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 ONES (64), /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* Computes a dtv-relative displacement, the difference between the value
1367 of sym+add and the base address of the thread-local storage block that
1368 contains the definition of sym, minus 0x8000. */
1369 HOWTO (R_PPC64_DTPREL64,
1370 0, /* rightshift */
1371 4, /* size (0 = byte, 1 = short, 2 = long) */
1372 64, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL64", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 ONES (64), /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* A 16 bit dtprel reloc. */
1384 HOWTO (R_PPC64_DTPREL16,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_signed, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16, but no overflow. */
1399 HOWTO (R_PPC64_DTPREL16_LO,
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_dont, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_LO", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HI,
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_HI", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HA,
1430 16, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_signed, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HA", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHER,
1445 32, /* rightshift */
1446 1, /* size (0 = byte, 1 = short, 2 = long) */
1447 16, /* bitsize */
1448 FALSE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 ppc64_elf_unhandled_reloc, /* special_function */
1452 "R_PPC64_DTPREL16_HIGHER", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1460 32, /* rightshift */
1461 1, /* size (0 = byte, 1 = short, 2 = long) */
1462 16, /* bitsize */
1463 FALSE, /* pc_relative */
1464 0, /* bitpos */
1465 complain_overflow_dont, /* complain_on_overflow */
1466 ppc64_elf_unhandled_reloc, /* special_function */
1467 "R_PPC64_DTPREL16_HIGHERA", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1475 48, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 16, /* bitsize */
1478 FALSE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 ppc64_elf_unhandled_reloc, /* special_function */
1482 "R_PPC64_DTPREL16_HIGHEST", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1489 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1490 48, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_dont, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xffff, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16, but for insns with a DS field. */
1504 HOWTO (R_PPC64_DTPREL16_DS,
1505 0, /* rightshift */
1506 1, /* size (0 = byte, 1 = short, 2 = long) */
1507 16, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_signed, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Like DTPREL16_DS, but no overflow. */
1519 HOWTO (R_PPC64_DTPREL16_LO_DS,
1520 0, /* rightshift */
1521 1, /* size (0 = byte, 1 = short, 2 = long) */
1522 16, /* bitsize */
1523 FALSE, /* pc_relative */
1524 0, /* bitpos */
1525 complain_overflow_dont, /* complain_on_overflow */
1526 ppc64_elf_unhandled_reloc, /* special_function */
1527 "R_PPC64_DTPREL16_LO_DS", /* name */
1528 FALSE, /* partial_inplace */
1529 0, /* src_mask */
1530 0xfffc, /* dst_mask */
1531 FALSE), /* pcrel_offset */
1532
1533 /* Computes a tp-relative displacement, the difference between the value of
1534 sym+add and the value of the thread pointer (r13). */
1535 HOWTO (R_PPC64_TPREL64,
1536 0, /* rightshift */
1537 4, /* size (0 = byte, 1 = short, 2 = long) */
1538 64, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL64", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 ONES (64), /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* A 16 bit tprel reloc. */
1550 HOWTO (R_PPC64_TPREL16,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_signed, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16, but no overflow. */
1565 HOWTO (R_PPC64_TPREL16_LO,
1566 0, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_LO", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_LO, but next higher group of 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HI,
1581 16, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_signed, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_HI", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but adjust for low 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HA,
1596 16, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_signed, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HA", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HI, but next higher group of 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHER,
1611 32, /* rightshift */
1612 1, /* size (0 = byte, 1 = short, 2 = long) */
1613 16, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont, /* complain_on_overflow */
1617 ppc64_elf_unhandled_reloc, /* special_function */
1618 "R_PPC64_TPREL16_HIGHER", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHERA,
1626 32, /* rightshift */
1627 1, /* size (0 = byte, 1 = short, 2 = long) */
1628 16, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont, /* complain_on_overflow */
1632 ppc64_elf_unhandled_reloc, /* special_function */
1633 "R_PPC64_TPREL16_HIGHERA", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHEST,
1641 48, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_TPREL16_HIGHEST", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1655 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1656 48, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_HIGHESTA", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16, but for insns with a DS field. */
1670 HOWTO (R_PPC64_TPREL16_DS,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_signed, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like TPREL16_DS, but no overflow. */
1685 HOWTO (R_PPC64_TPREL16_LO_DS,
1686 0, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_TPREL16_LO_DS", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xfffc, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1700 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1701 to the first entry relative to the TOC base (r2). */
1702 HOWTO (R_PPC64_GOT_TLSGD16,
1703 0, /* rightshift */
1704 1, /* size (0 = byte, 1 = short, 2 = long) */
1705 16, /* bitsize */
1706 FALSE, /* pc_relative */
1707 0, /* bitpos */
1708 complain_overflow_signed, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16, but no overflow. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1718 0, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_dont, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_LO", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1733 16, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_signed, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_TLSGD16_HI", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1747 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1748 16, /* rightshift */
1749 1, /* size (0 = byte, 1 = short, 2 = long) */
1750 16, /* bitsize */
1751 FALSE, /* pc_relative */
1752 0, /* bitpos */
1753 complain_overflow_signed, /* complain_on_overflow */
1754 ppc64_elf_unhandled_reloc, /* special_function */
1755 "R_PPC64_GOT_TLSGD16_HA", /* name */
1756 FALSE, /* partial_inplace */
1757 0, /* src_mask */
1758 0xffff, /* dst_mask */
1759 FALSE), /* pcrel_offset */
1760
1761 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1762 with values (sym+add)@dtpmod and zero, and computes the offset to the
1763 first entry relative to the TOC base (r2). */
1764 HOWTO (R_PPC64_GOT_TLSLD16,
1765 0, /* rightshift */
1766 1, /* size (0 = byte, 1 = short, 2 = long) */
1767 16, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_signed, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16, but no overflow. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_dont, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_LO", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1795 16, /* rightshift */
1796 1, /* size (0 = byte, 1 = short, 2 = long) */
1797 16, /* bitsize */
1798 FALSE, /* pc_relative */
1799 0, /* bitpos */
1800 complain_overflow_signed, /* complain_on_overflow */
1801 ppc64_elf_unhandled_reloc, /* special_function */
1802 "R_PPC64_GOT_TLSLD16_HI", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1809 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1810 16, /* rightshift */
1811 1, /* size (0 = byte, 1 = short, 2 = long) */
1812 16, /* bitsize */
1813 FALSE, /* pc_relative */
1814 0, /* bitpos */
1815 complain_overflow_signed, /* complain_on_overflow */
1816 ppc64_elf_unhandled_reloc, /* special_function */
1817 "R_PPC64_GOT_TLSLD16_HA", /* name */
1818 FALSE, /* partial_inplace */
1819 0, /* src_mask */
1820 0xffff, /* dst_mask */
1821 FALSE), /* pcrel_offset */
1822
1823 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1824 the offset to the entry relative to the TOC base (r2). */
1825 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1826 0, /* rightshift */
1827 1, /* size (0 = byte, 1 = short, 2 = long) */
1828 16, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
1831 complain_overflow_signed, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_DS, but no overflow. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1841 0, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_dont, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xfffc, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1856 16, /* rightshift */
1857 1, /* size (0 = byte, 1 = short, 2 = long) */
1858 16, /* bitsize */
1859 FALSE, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_signed, /* complain_on_overflow */
1862 ppc64_elf_unhandled_reloc, /* special_function */
1863 "R_PPC64_GOT_DTPREL16_HI", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1870 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1871 16, /* rightshift */
1872 1, /* size (0 = byte, 1 = short, 2 = long) */
1873 16, /* bitsize */
1874 FALSE, /* pc_relative */
1875 0, /* bitpos */
1876 complain_overflow_signed, /* complain_on_overflow */
1877 ppc64_elf_unhandled_reloc, /* special_function */
1878 "R_PPC64_GOT_DTPREL16_HA", /* name */
1879 FALSE, /* partial_inplace */
1880 0, /* src_mask */
1881 0xffff, /* dst_mask */
1882 FALSE), /* pcrel_offset */
1883
1884 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1885 offset to the entry relative to the TOC base (r2). */
1886 HOWTO (R_PPC64_GOT_TPREL16_DS,
1887 0, /* rightshift */
1888 1, /* size (0 = byte, 1 = short, 2 = long) */
1889 16, /* bitsize */
1890 FALSE, /* pc_relative */
1891 0, /* bitpos */
1892 complain_overflow_signed, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_DS, but no overflow. */
1901 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1902 0, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_dont, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xfffc, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HI,
1917 16, /* rightshift */
1918 1, /* size (0 = byte, 1 = short, 2 = long) */
1919 16, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_signed, /* complain_on_overflow */
1923 ppc64_elf_unhandled_reloc, /* special_function */
1924 "R_PPC64_GOT_TPREL16_HI", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1931 HOWTO (R_PPC64_GOT_TPREL16_HA,
1932 16, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 FALSE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_signed, /* complain_on_overflow */
1938 ppc64_elf_unhandled_reloc, /* special_function */
1939 "R_PPC64_GOT_TPREL16_HA", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 FALSE), /* pcrel_offset */
1944
1945 HOWTO (R_PPC64_JMP_IREL, /* type */
1946 0, /* rightshift */
1947 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1948 0, /* bitsize */
1949 FALSE, /* pc_relative */
1950 0, /* bitpos */
1951 complain_overflow_dont, /* complain_on_overflow */
1952 ppc64_elf_unhandled_reloc, /* special_function */
1953 "R_PPC64_JMP_IREL", /* name */
1954 FALSE, /* partial_inplace */
1955 0, /* src_mask */
1956 0, /* dst_mask */
1957 FALSE), /* pcrel_offset */
1958
1959 HOWTO (R_PPC64_IRELATIVE, /* type */
1960 0, /* rightshift */
1961 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1962 64, /* bitsize */
1963 FALSE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_dont, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_IRELATIVE", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 ONES (64), /* dst_mask */
1971 FALSE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation. */
1974 HOWTO (R_PPC64_REL16, /* type */
1975 0, /* rightshift */
1976 1, /* size (0 = byte, 1 = short, 2 = long) */
1977 16, /* bitsize */
1978 TRUE, /* pc_relative */
1979 0, /* bitpos */
1980 complain_overflow_signed, /* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* A 16 bit relative relocation without overflow. */
1989 HOWTO (R_PPC64_REL16_LO, /* type */
1990 0, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_dont,/* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_LO", /* name */
1998 FALSE, /* partial_inplace */
1999 0, /* src_mask */
2000 0xffff, /* dst_mask */
2001 TRUE), /* pcrel_offset */
2002
2003 /* The high order 16 bits of a relative address. */
2004 HOWTO (R_PPC64_REL16_HI, /* type */
2005 16, /* rightshift */
2006 1, /* size (0 = byte, 1 = short, 2 = long) */
2007 16, /* bitsize */
2008 TRUE, /* pc_relative */
2009 0, /* bitpos */
2010 complain_overflow_signed, /* complain_on_overflow */
2011 bfd_elf_generic_reloc, /* special_function */
2012 "R_PPC64_REL16_HI", /* name */
2013 FALSE, /* partial_inplace */
2014 0, /* src_mask */
2015 0xffff, /* dst_mask */
2016 TRUE), /* pcrel_offset */
2017
2018 /* The high order 16 bits of a relative address, plus 1 if the contents of
2019 the low 16 bits, treated as a signed number, is negative. */
2020 HOWTO (R_PPC64_REL16_HA, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 TRUE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_signed, /* complain_on_overflow */
2027 ppc64_elf_ha_reloc, /* special_function */
2028 "R_PPC64_REL16_HA", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 TRUE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2035 HOWTO (R_PPC64_REL16DX_HA, /* type */
2036 16, /* rightshift */
2037 2, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 TRUE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_signed, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_REL16DX_HA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0x1fffc1, /* dst_mask */
2047 TRUE), /* pcrel_offset */
2048
2049 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2050 HOWTO (R_PPC64_16DX_HA, /* type */
2051 16, /* rightshift */
2052 2, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_signed, /* complain_on_overflow */
2057 ppc64_elf_ha_reloc, /* special_function */
2058 "R_PPC64_16DX_HA", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0x1fffc1, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2065 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2066 16, /* rightshift */
2067 1, /* size (0 = byte, 1 = short, 2 = long) */
2068 16, /* bitsize */
2069 FALSE, /* pc_relative */
2070 0, /* bitpos */
2071 complain_overflow_dont, /* complain_on_overflow */
2072 bfd_elf_generic_reloc, /* special_function */
2073 "R_PPC64_ADDR16_HIGH", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2080 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2081 16, /* rightshift */
2082 1, /* size (0 = byte, 1 = short, 2 = long) */
2083 16, /* bitsize */
2084 FALSE, /* pc_relative */
2085 0, /* bitpos */
2086 complain_overflow_dont, /* complain_on_overflow */
2087 ppc64_elf_ha_reloc, /* special_function */
2088 "R_PPC64_ADDR16_HIGHA", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2095 HOWTO (R_PPC64_DTPREL16_HIGH,
2096 16, /* rightshift */
2097 1, /* size (0 = byte, 1 = short, 2 = long) */
2098 16, /* bitsize */
2099 FALSE, /* pc_relative */
2100 0, /* bitpos */
2101 complain_overflow_dont, /* complain_on_overflow */
2102 ppc64_elf_unhandled_reloc, /* special_function */
2103 "R_PPC64_DTPREL16_HIGH", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2110 HOWTO (R_PPC64_DTPREL16_HIGHA,
2111 16, /* rightshift */
2112 1, /* size (0 = byte, 1 = short, 2 = long) */
2113 16, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 ppc64_elf_unhandled_reloc, /* special_function */
2118 "R_PPC64_DTPREL16_HIGHA", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 0xffff, /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2125 HOWTO (R_PPC64_TPREL16_HIGH,
2126 16, /* rightshift */
2127 1, /* size (0 = byte, 1 = short, 2 = long) */
2128 16, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 ppc64_elf_unhandled_reloc, /* special_function */
2133 "R_PPC64_TPREL16_HIGH", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0xffff, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2140 HOWTO (R_PPC64_TPREL16_HIGHA,
2141 16, /* rightshift */
2142 1, /* size (0 = byte, 1 = short, 2 = long) */
2143 16, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 ppc64_elf_unhandled_reloc, /* special_function */
2148 "R_PPC64_TPREL16_HIGHA", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0xffff, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153
2154 /* Marker reloc on ELFv2 large-model function entry. */
2155 HOWTO (R_PPC64_ENTRY,
2156 0, /* rightshift */
2157 2, /* size (0 = byte, 1 = short, 2 = long) */
2158 32, /* bitsize */
2159 FALSE, /* pc_relative */
2160 0, /* bitpos */
2161 complain_overflow_dont, /* complain_on_overflow */
2162 bfd_elf_generic_reloc, /* special_function */
2163 "R_PPC64_ENTRY", /* name */
2164 FALSE, /* partial_inplace */
2165 0, /* src_mask */
2166 0, /* dst_mask */
2167 FALSE), /* pcrel_offset */
2168
2169 /* Like ADDR64, but use local entry point of function. */
2170 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2171 0, /* rightshift */
2172 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2173 64, /* bitsize */
2174 FALSE, /* pc_relative */
2175 0, /* bitpos */
2176 complain_overflow_dont, /* complain_on_overflow */
2177 bfd_elf_generic_reloc, /* special_function */
2178 "R_PPC64_ADDR64_LOCAL", /* name */
2179 FALSE, /* partial_inplace */
2180 0, /* src_mask */
2181 ONES (64), /* dst_mask */
2182 FALSE), /* pcrel_offset */
2183
2184 /* GNU extension to record C++ vtable hierarchy. */
2185 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2186 0, /* rightshift */
2187 0, /* size (0 = byte, 1 = short, 2 = long) */
2188 0, /* bitsize */
2189 FALSE, /* pc_relative */
2190 0, /* bitpos */
2191 complain_overflow_dont, /* complain_on_overflow */
2192 NULL, /* special_function */
2193 "R_PPC64_GNU_VTINHERIT", /* name */
2194 FALSE, /* partial_inplace */
2195 0, /* src_mask */
2196 0, /* dst_mask */
2197 FALSE), /* pcrel_offset */
2198
2199 /* GNU extension to record C++ vtable member usage. */
2200 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2201 0, /* rightshift */
2202 0, /* size (0 = byte, 1 = short, 2 = long) */
2203 0, /* bitsize */
2204 FALSE, /* pc_relative */
2205 0, /* bitpos */
2206 complain_overflow_dont, /* complain_on_overflow */
2207 NULL, /* special_function */
2208 "R_PPC64_GNU_VTENTRY", /* name */
2209 FALSE, /* partial_inplace */
2210 0, /* src_mask */
2211 0, /* dst_mask */
2212 FALSE), /* pcrel_offset */
2213 };
2214
2215 \f
2216 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2217 be done. */
2218
2219 static void
2220 ppc_howto_init (void)
2221 {
2222 unsigned int i, type;
2223
2224 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2225 {
2226 type = ppc64_elf_howto_raw[i].type;
2227 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2228 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2229 }
2230 }
2231
2232 static reloc_howto_type *
2233 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2234 bfd_reloc_code_real_type code)
2235 {
2236 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2237
2238 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2239 /* Initialize howto table if needed. */
2240 ppc_howto_init ();
2241
2242 switch (code)
2243 {
2244 default:
2245 return NULL;
2246
2247 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2248 break;
2249 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2250 break;
2251 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2252 break;
2253 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2254 break;
2255 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2256 break;
2257 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2258 break;
2259 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2260 break;
2261 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2262 break;
2263 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2264 break;
2265 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2266 break;
2267 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2268 break;
2269 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2270 break;
2271 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2272 break;
2273 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2274 break;
2275 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2276 break;
2277 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2278 break;
2279 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2280 break;
2281 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2282 break;
2283 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2284 break;
2285 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2286 break;
2287 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2288 break;
2289 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2290 break;
2291 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2292 break;
2293 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2294 break;
2295 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2296 break;
2297 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2298 break;
2299 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2300 break;
2301 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2302 break;
2303 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2304 break;
2305 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2306 break;
2307 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2308 break;
2309 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2310 break;
2311 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2312 break;
2313 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2314 break;
2315 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2316 break;
2317 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2318 break;
2319 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2320 break;
2321 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2322 break;
2323 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2324 break;
2325 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2326 break;
2327 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2328 break;
2329 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2330 break;
2331 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2332 break;
2333 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2334 break;
2335 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2336 break;
2337 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2338 break;
2339 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2340 break;
2341 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2342 break;
2343 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2346 break;
2347 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2348 break;
2349 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2350 break;
2351 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2352 break;
2353 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2354 break;
2355 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2356 break;
2357 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2358 break;
2359 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2360 break;
2361 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2362 break;
2363 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2364 break;
2365 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2366 break;
2367 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2368 break;
2369 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2370 break;
2371 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2372 break;
2373 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2374 break;
2375 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2376 break;
2377 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2378 break;
2379 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2380 break;
2381 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2382 break;
2383 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2384 break;
2385 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2386 break;
2387 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2388 break;
2389 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2390 break;
2391 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2392 break;
2393 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2394 break;
2395 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2396 break;
2397 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2398 break;
2399 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2400 break;
2401 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2402 break;
2403 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2408 break;
2409 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2410 break;
2411 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2412 break;
2413 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2414 break;
2415 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2416 break;
2417 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2418 break;
2419 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2420 break;
2421 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2422 break;
2423 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2424 break;
2425 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2426 break;
2427 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2428 break;
2429 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2434 break;
2435 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2436 break;
2437 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2438 break;
2439 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2440 break;
2441 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2442 break;
2443 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2444 break;
2445 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2446 break;
2447 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2448 break;
2449 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2450 break;
2451 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2452 break;
2453 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2454 break;
2455 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2456 break;
2457 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2458 break;
2459 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2460 break;
2461 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2462 break;
2463 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2464 break;
2465 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2466 break;
2467 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2468 break;
2469 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2470 break;
2471 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2472 break;
2473 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2474 break;
2475 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2476 break;
2477 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2478 break;
2479 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2480 break;
2481 }
2482
2483 return ppc64_elf_howto_table[r];
2484 };
2485
2486 static reloc_howto_type *
2487 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2488 const char *r_name)
2489 {
2490 unsigned int i;
2491
2492 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2493 if (ppc64_elf_howto_raw[i].name != NULL
2494 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2495 return &ppc64_elf_howto_raw[i];
2496
2497 return NULL;
2498 }
2499
2500 /* Set the howto pointer for a PowerPC ELF reloc. */
2501
2502 static void
2503 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2504 Elf_Internal_Rela *dst)
2505 {
2506 unsigned int type;
2507
2508 /* Initialize howto table if needed. */
2509 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2510 ppc_howto_init ();
2511
2512 type = ELF64_R_TYPE (dst->r_info);
2513 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2514 {
2515 /* xgettext:c-format */
2516 _bfd_error_handler (_("%B: invalid relocation type %d"),
2517 abfd, (int) type);
2518 type = R_PPC64_NONE;
2519 }
2520 cache_ptr->howto = ppc64_elf_howto_table[type];
2521 }
2522
2523 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2524
2525 static bfd_reloc_status_type
2526 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2527 void *data, asection *input_section,
2528 bfd *output_bfd, char **error_message)
2529 {
2530 enum elf_ppc64_reloc_type r_type;
2531 long insn;
2532 bfd_size_type octets;
2533 bfd_vma value;
2534
2535 /* If this is a relocatable link (output_bfd test tells us), just
2536 call the generic function. Any adjustment will be done at final
2537 link time. */
2538 if (output_bfd != NULL)
2539 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2540 input_section, output_bfd, error_message);
2541
2542 /* Adjust the addend for sign extension of the low 16 bits.
2543 We won't actually be using the low 16 bits, so trashing them
2544 doesn't matter. */
2545 reloc_entry->addend += 0x8000;
2546 r_type = reloc_entry->howto->type;
2547 if (r_type != R_PPC64_REL16DX_HA)
2548 return bfd_reloc_continue;
2549
2550 value = 0;
2551 if (!bfd_is_com_section (symbol->section))
2552 value = symbol->value;
2553 value += (reloc_entry->addend
2554 + symbol->section->output_offset
2555 + symbol->section->output_section->vma);
2556 value -= (reloc_entry->address
2557 + input_section->output_offset
2558 + input_section->output_section->vma);
2559 value = (bfd_signed_vma) value >> 16;
2560
2561 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2562 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2563 insn &= ~0x1fffc1;
2564 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2565 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2566 if (value + 0x8000 > 0xffff)
2567 return bfd_reloc_overflow;
2568 return bfd_reloc_ok;
2569 }
2570
2571 static bfd_reloc_status_type
2572 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2573 void *data, asection *input_section,
2574 bfd *output_bfd, char **error_message)
2575 {
2576 if (output_bfd != NULL)
2577 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2578 input_section, output_bfd, error_message);
2579
2580 if (strcmp (symbol->section->name, ".opd") == 0
2581 && (symbol->section->owner->flags & DYNAMIC) == 0)
2582 {
2583 bfd_vma dest = opd_entry_value (symbol->section,
2584 symbol->value + reloc_entry->addend,
2585 NULL, NULL, FALSE);
2586 if (dest != (bfd_vma) -1)
2587 reloc_entry->addend = dest - (symbol->value
2588 + symbol->section->output_section->vma
2589 + symbol->section->output_offset);
2590 }
2591 else
2592 {
2593 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2594
2595 if (symbol->section->owner != abfd
2596 && symbol->section->owner != NULL
2597 && abiversion (symbol->section->owner) >= 2)
2598 {
2599 unsigned int i;
2600
2601 for (i = 0; i < symbol->section->owner->symcount; ++i)
2602 {
2603 asymbol *symdef = symbol->section->owner->outsymbols[i];
2604
2605 if (strcmp (symdef->name, symbol->name) == 0)
2606 {
2607 elfsym = (elf_symbol_type *) symdef;
2608 break;
2609 }
2610 }
2611 }
2612 reloc_entry->addend
2613 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2614 }
2615 return bfd_reloc_continue;
2616 }
2617
2618 static bfd_reloc_status_type
2619 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2620 void *data, asection *input_section,
2621 bfd *output_bfd, char **error_message)
2622 {
2623 long insn;
2624 enum elf_ppc64_reloc_type r_type;
2625 bfd_size_type octets;
2626 /* Assume 'at' branch hints. */
2627 bfd_boolean is_isa_v2 = TRUE;
2628
2629 /* If this is a relocatable link (output_bfd test tells us), just
2630 call the generic function. Any adjustment will be done at final
2631 link time. */
2632 if (output_bfd != NULL)
2633 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2634 input_section, output_bfd, error_message);
2635
2636 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2637 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2638 insn &= ~(0x01 << 21);
2639 r_type = reloc_entry->howto->type;
2640 if (r_type == R_PPC64_ADDR14_BRTAKEN
2641 || r_type == R_PPC64_REL14_BRTAKEN)
2642 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2643
2644 if (is_isa_v2)
2645 {
2646 /* Set 'a' bit. This is 0b00010 in BO field for branch
2647 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2648 for branch on CTR insns (BO == 1a00t or 1a01t). */
2649 if ((insn & (0x14 << 21)) == (0x04 << 21))
2650 insn |= 0x02 << 21;
2651 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2652 insn |= 0x08 << 21;
2653 else
2654 goto out;
2655 }
2656 else
2657 {
2658 bfd_vma target = 0;
2659 bfd_vma from;
2660
2661 if (!bfd_is_com_section (symbol->section))
2662 target = symbol->value;
2663 target += symbol->section->output_section->vma;
2664 target += symbol->section->output_offset;
2665 target += reloc_entry->addend;
2666
2667 from = (reloc_entry->address
2668 + input_section->output_offset
2669 + input_section->output_section->vma);
2670
2671 /* Invert 'y' bit if not the default. */
2672 if ((bfd_signed_vma) (target - from) < 0)
2673 insn ^= 0x01 << 21;
2674 }
2675 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2676 out:
2677 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2678 input_section, output_bfd, error_message);
2679 }
2680
2681 static bfd_reloc_status_type
2682 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2683 void *data, asection *input_section,
2684 bfd *output_bfd, char **error_message)
2685 {
2686 /* If this is a relocatable link (output_bfd test tells us), just
2687 call the generic function. Any adjustment will be done at final
2688 link time. */
2689 if (output_bfd != NULL)
2690 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2691 input_section, output_bfd, error_message);
2692
2693 /* Subtract the symbol section base address. */
2694 reloc_entry->addend -= symbol->section->output_section->vma;
2695 return bfd_reloc_continue;
2696 }
2697
2698 static bfd_reloc_status_type
2699 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2700 void *data, asection *input_section,
2701 bfd *output_bfd, char **error_message)
2702 {
2703 /* If this is a relocatable link (output_bfd test tells us), just
2704 call the generic function. Any adjustment will be done at final
2705 link time. */
2706 if (output_bfd != NULL)
2707 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2708 input_section, output_bfd, error_message);
2709
2710 /* Subtract the symbol section base address. */
2711 reloc_entry->addend -= symbol->section->output_section->vma;
2712
2713 /* Adjust the addend for sign extension of the low 16 bits. */
2714 reloc_entry->addend += 0x8000;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722 {
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738 return bfd_reloc_continue;
2739 }
2740
2741 static bfd_reloc_status_type
2742 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2743 void *data, asection *input_section,
2744 bfd *output_bfd, char **error_message)
2745 {
2746 bfd_vma TOCstart;
2747
2748 /* If this is a relocatable link (output_bfd test tells us), just
2749 call the generic function. Any adjustment will be done at final
2750 link time. */
2751 if (output_bfd != NULL)
2752 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2753 input_section, output_bfd, error_message);
2754
2755 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2756 if (TOCstart == 0)
2757 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2758
2759 /* Subtract the TOC base address. */
2760 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2761
2762 /* Adjust the addend for sign extension of the low 16 bits. */
2763 reloc_entry->addend += 0x8000;
2764 return bfd_reloc_continue;
2765 }
2766
2767 static bfd_reloc_status_type
2768 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771 {
2772 bfd_vma TOCstart;
2773 bfd_size_type octets;
2774
2775 /* If this is a relocatable link (output_bfd test tells us), just
2776 call the generic function. Any adjustment will be done at final
2777 link time. */
2778 if (output_bfd != NULL)
2779 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2780 input_section, output_bfd, error_message);
2781
2782 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2783 if (TOCstart == 0)
2784 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2785
2786 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2787 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2788 return bfd_reloc_ok;
2789 }
2790
2791 static bfd_reloc_status_type
2792 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2793 void *data, asection *input_section,
2794 bfd *output_bfd, char **error_message)
2795 {
2796 /* If this is a relocatable link (output_bfd test tells us), just
2797 call the generic function. Any adjustment will be done at final
2798 link time. */
2799 if (output_bfd != NULL)
2800 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2801 input_section, output_bfd, error_message);
2802
2803 if (error_message != NULL)
2804 {
2805 static char buf[60];
2806 sprintf (buf, "generic linker can't handle %s",
2807 reloc_entry->howto->name);
2808 *error_message = buf;
2809 }
2810 return bfd_reloc_dangerous;
2811 }
2812
2813 /* Track GOT entries needed for a given symbol. We might need more
2814 than one got entry per symbol. */
2815 struct got_entry
2816 {
2817 struct got_entry *next;
2818
2819 /* The symbol addend that we'll be placing in the GOT. */
2820 bfd_vma addend;
2821
2822 /* Unlike other ELF targets, we use separate GOT entries for the same
2823 symbol referenced from different input files. This is to support
2824 automatic multiple TOC/GOT sections, where the TOC base can vary
2825 from one input file to another. After partitioning into TOC groups
2826 we merge entries within the group.
2827
2828 Point to the BFD owning this GOT entry. */
2829 bfd *owner;
2830
2831 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2832 TLS_TPREL or TLS_DTPREL for tls entries. */
2833 unsigned char tls_type;
2834
2835 /* Non-zero if got.ent points to real entry. */
2836 unsigned char is_indirect;
2837
2838 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2839 union
2840 {
2841 bfd_signed_vma refcount;
2842 bfd_vma offset;
2843 struct got_entry *ent;
2844 } got;
2845 };
2846
2847 /* The same for PLT. */
2848 struct plt_entry
2849 {
2850 struct plt_entry *next;
2851
2852 bfd_vma addend;
2853
2854 union
2855 {
2856 bfd_signed_vma refcount;
2857 bfd_vma offset;
2858 } plt;
2859 };
2860
2861 struct ppc64_elf_obj_tdata
2862 {
2863 struct elf_obj_tdata elf;
2864
2865 /* Shortcuts to dynamic linker sections. */
2866 asection *got;
2867 asection *relgot;
2868
2869 /* Used during garbage collection. We attach global symbols defined
2870 on removed .opd entries to this section so that the sym is removed. */
2871 asection *deleted_section;
2872
2873 /* TLS local dynamic got entry handling. Support for multiple GOT
2874 sections means we potentially need one of these for each input bfd. */
2875 struct got_entry tlsld_got;
2876
2877 union {
2878 /* A copy of relocs before they are modified for --emit-relocs. */
2879 Elf_Internal_Rela *relocs;
2880
2881 /* Section contents. */
2882 bfd_byte *contents;
2883 } opd;
2884
2885 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2886 the reloc to be in the range -32768 to 32767. */
2887 unsigned int has_small_toc_reloc : 1;
2888
2889 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2890 instruction not one we handle. */
2891 unsigned int unexpected_toc_insn : 1;
2892 };
2893
2894 #define ppc64_elf_tdata(bfd) \
2895 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2896
2897 #define ppc64_tlsld_got(bfd) \
2898 (&ppc64_elf_tdata (bfd)->tlsld_got)
2899
2900 #define is_ppc64_elf(bfd) \
2901 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2902 && elf_object_id (bfd) == PPC64_ELF_DATA)
2903
2904 /* Override the generic function because we store some extras. */
2905
2906 static bfd_boolean
2907 ppc64_elf_mkobject (bfd *abfd)
2908 {
2909 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2910 PPC64_ELF_DATA);
2911 }
2912
2913 /* Fix bad default arch selected for a 64 bit input bfd when the
2914 default is 32 bit. Also select arch based on apuinfo. */
2915
2916 static bfd_boolean
2917 ppc64_elf_object_p (bfd *abfd)
2918 {
2919 if (!abfd->arch_info->the_default)
2920 return TRUE;
2921
2922 if (abfd->arch_info->bits_per_word == 32)
2923 {
2924 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2925
2926 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2927 {
2928 /* Relies on arch after 32 bit default being 64 bit default. */
2929 abfd->arch_info = abfd->arch_info->next;
2930 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2931 }
2932 }
2933 return _bfd_elf_ppc_set_arch (abfd);
2934 }
2935
2936 /* Support for core dump NOTE sections. */
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 size_t offset, size;
2942
2943 if (note->descsz != 504)
2944 return FALSE;
2945
2946 /* pr_cursig */
2947 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2948
2949 /* pr_pid */
2950 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2951
2952 /* pr_reg */
2953 offset = 112;
2954 size = 384;
2955
2956 /* Make a ".reg/999" section. */
2957 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2958 size, note->descpos + offset);
2959 }
2960
2961 static bfd_boolean
2962 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2963 {
2964 if (note->descsz != 136)
2965 return FALSE;
2966
2967 elf_tdata (abfd)->core->pid
2968 = bfd_get_32 (abfd, note->descdata + 24);
2969 elf_tdata (abfd)->core->program
2970 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2971 elf_tdata (abfd)->core->command
2972 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2973
2974 return TRUE;
2975 }
2976
2977 static char *
2978 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2979 ...)
2980 {
2981 switch (note_type)
2982 {
2983 default:
2984 return NULL;
2985
2986 case NT_PRPSINFO:
2987 {
2988 char data[136];
2989 va_list ap;
2990
2991 va_start (ap, note_type);
2992 memset (data, 0, sizeof (data));
2993 strncpy (data + 40, va_arg (ap, const char *), 16);
2994 strncpy (data + 56, va_arg (ap, const char *), 80);
2995 va_end (ap);
2996 return elfcore_write_note (abfd, buf, bufsiz,
2997 "CORE", note_type, data, sizeof (data));
2998 }
2999
3000 case NT_PRSTATUS:
3001 {
3002 char data[504];
3003 va_list ap;
3004 long pid;
3005 int cursig;
3006 const void *greg;
3007
3008 va_start (ap, note_type);
3009 memset (data, 0, 112);
3010 pid = va_arg (ap, long);
3011 bfd_put_32 (abfd, pid, data + 32);
3012 cursig = va_arg (ap, int);
3013 bfd_put_16 (abfd, cursig, data + 12);
3014 greg = va_arg (ap, const void *);
3015 memcpy (data + 112, greg, 384);
3016 memset (data + 496, 0, 8);
3017 va_end (ap);
3018 return elfcore_write_note (abfd, buf, bufsiz,
3019 "CORE", note_type, data, sizeof (data));
3020 }
3021 }
3022 }
3023
3024 /* Add extra PPC sections. */
3025
3026 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3027 {
3028 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3029 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3030 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3031 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3032 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3033 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3034 { NULL, 0, 0, 0, 0 }
3035 };
3036
3037 enum _ppc64_sec_type {
3038 sec_normal = 0,
3039 sec_opd = 1,
3040 sec_toc = 2
3041 };
3042
3043 struct _ppc64_elf_section_data
3044 {
3045 struct bfd_elf_section_data elf;
3046
3047 union
3048 {
3049 /* An array with one entry for each opd function descriptor,
3050 and some spares since opd entries may be either 16 or 24 bytes. */
3051 #define OPD_NDX(OFF) ((OFF) >> 4)
3052 struct _opd_sec_data
3053 {
3054 /* Points to the function code section for local opd entries. */
3055 asection **func_sec;
3056
3057 /* After editing .opd, adjust references to opd local syms. */
3058 long *adjust;
3059 } opd;
3060
3061 /* An array for toc sections, indexed by offset/8. */
3062 struct _toc_sec_data
3063 {
3064 /* Specifies the relocation symbol index used at a given toc offset. */
3065 unsigned *symndx;
3066
3067 /* And the relocation addend. */
3068 bfd_vma *add;
3069 } toc;
3070 } u;
3071
3072 enum _ppc64_sec_type sec_type:2;
3073
3074 /* Flag set when small branches are detected. Used to
3075 select suitable defaults for the stub group size. */
3076 unsigned int has_14bit_branch:1;
3077 };
3078
3079 #define ppc64_elf_section_data(sec) \
3080 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3081
3082 static bfd_boolean
3083 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3084 {
3085 if (!sec->used_by_bfd)
3086 {
3087 struct _ppc64_elf_section_data *sdata;
3088 bfd_size_type amt = sizeof (*sdata);
3089
3090 sdata = bfd_zalloc (abfd, amt);
3091 if (sdata == NULL)
3092 return FALSE;
3093 sec->used_by_bfd = sdata;
3094 }
3095
3096 return _bfd_elf_new_section_hook (abfd, sec);
3097 }
3098
3099 static struct _opd_sec_data *
3100 get_opd_info (asection * sec)
3101 {
3102 if (sec != NULL
3103 && ppc64_elf_section_data (sec) != NULL
3104 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3105 return &ppc64_elf_section_data (sec)->u.opd;
3106 return NULL;
3107 }
3108 \f
3109 /* Parameters for the qsort hook. */
3110 static bfd_boolean synthetic_relocatable;
3111 static asection *synthetic_opd;
3112
3113 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3114
3115 static int
3116 compare_symbols (const void *ap, const void *bp)
3117 {
3118 const asymbol *a = * (const asymbol **) ap;
3119 const asymbol *b = * (const asymbol **) bp;
3120
3121 /* Section symbols first. */
3122 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3123 return -1;
3124 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3125 return 1;
3126
3127 /* then .opd symbols. */
3128 if (synthetic_opd != NULL)
3129 {
3130 if (strcmp (a->section->name, ".opd") == 0
3131 && strcmp (b->section->name, ".opd") != 0)
3132 return -1;
3133 if (strcmp (a->section->name, ".opd") != 0
3134 && strcmp (b->section->name, ".opd") == 0)
3135 return 1;
3136 }
3137
3138 /* then other code symbols. */
3139 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3140 == (SEC_CODE | SEC_ALLOC)
3141 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3142 != (SEC_CODE | SEC_ALLOC))
3143 return -1;
3144
3145 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3146 != (SEC_CODE | SEC_ALLOC)
3147 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3148 == (SEC_CODE | SEC_ALLOC))
3149 return 1;
3150
3151 if (synthetic_relocatable)
3152 {
3153 if (a->section->id < b->section->id)
3154 return -1;
3155
3156 if (a->section->id > b->section->id)
3157 return 1;
3158 }
3159
3160 if (a->value + a->section->vma < b->value + b->section->vma)
3161 return -1;
3162
3163 if (a->value + a->section->vma > b->value + b->section->vma)
3164 return 1;
3165
3166 /* For syms with the same value, prefer strong dynamic global function
3167 syms over other syms. */
3168 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3169 return -1;
3170
3171 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3172 return 1;
3173
3174 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3175 return -1;
3176
3177 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3178 return 1;
3179
3180 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3181 return -1;
3182
3183 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3184 return 1;
3185
3186 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3187 return -1;
3188
3189 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3190 return 1;
3191
3192 return a > b;
3193 }
3194
3195 /* Search SYMS for a symbol of the given VALUE. */
3196
3197 static asymbol *
3198 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3199 {
3200 long mid;
3201
3202 if (id == (unsigned) -1)
3203 {
3204 while (lo < hi)
3205 {
3206 mid = (lo + hi) >> 1;
3207 if (syms[mid]->value + syms[mid]->section->vma < value)
3208 lo = mid + 1;
3209 else if (syms[mid]->value + syms[mid]->section->vma > value)
3210 hi = mid;
3211 else
3212 return syms[mid];
3213 }
3214 }
3215 else
3216 {
3217 while (lo < hi)
3218 {
3219 mid = (lo + hi) >> 1;
3220 if (syms[mid]->section->id < id)
3221 lo = mid + 1;
3222 else if (syms[mid]->section->id > id)
3223 hi = mid;
3224 else if (syms[mid]->value < value)
3225 lo = mid + 1;
3226 else if (syms[mid]->value > value)
3227 hi = mid;
3228 else
3229 return syms[mid];
3230 }
3231 }
3232 return NULL;
3233 }
3234
3235 static bfd_boolean
3236 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3237 {
3238 bfd_vma vma = *(bfd_vma *) ptr;
3239 return ((section->flags & SEC_ALLOC) != 0
3240 && section->vma <= vma
3241 && vma < section->vma + section->size);
3242 }
3243
3244 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3245 entry syms. Also generate @plt symbols for the glink branch table.
3246 Returns count of synthetic symbols in RET or -1 on error. */
3247
3248 static long
3249 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3250 long static_count, asymbol **static_syms,
3251 long dyn_count, asymbol **dyn_syms,
3252 asymbol **ret)
3253 {
3254 asymbol *s;
3255 long i;
3256 long count;
3257 char *names;
3258 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3259 asection *opd = NULL;
3260 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3261 asymbol **syms;
3262 int abi = abiversion (abfd);
3263
3264 *ret = NULL;
3265
3266 if (abi < 2)
3267 {
3268 opd = bfd_get_section_by_name (abfd, ".opd");
3269 if (opd == NULL && abi == 1)
3270 return 0;
3271 }
3272
3273 symcount = static_count;
3274 if (!relocatable)
3275 symcount += dyn_count;
3276 if (symcount == 0)
3277 return 0;
3278
3279 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3280 if (syms == NULL)
3281 return -1;
3282
3283 if (!relocatable && static_count != 0 && dyn_count != 0)
3284 {
3285 /* Use both symbol tables. */
3286 memcpy (syms, static_syms, static_count * sizeof (*syms));
3287 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3288 }
3289 else if (!relocatable && static_count == 0)
3290 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3291 else
3292 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3293
3294 synthetic_relocatable = relocatable;
3295 synthetic_opd = opd;
3296 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3297
3298 if (!relocatable && symcount > 1)
3299 {
3300 long j;
3301 /* Trim duplicate syms, since we may have merged the normal and
3302 dynamic symbols. Actually, we only care about syms that have
3303 different values, so trim any with the same value. */
3304 for (i = 1, j = 1; i < symcount; ++i)
3305 if (syms[i - 1]->value + syms[i - 1]->section->vma
3306 != syms[i]->value + syms[i]->section->vma)
3307 syms[j++] = syms[i];
3308 symcount = j;
3309 }
3310
3311 i = 0;
3312 /* Note that here and in compare_symbols we can't compare opd and
3313 sym->section directly. With separate debug info files, the
3314 symbols will be extracted from the debug file while abfd passed
3315 to this function is the real binary. */
3316 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3317 ++i;
3318 codesecsym = i;
3319
3320 for (; i < symcount; ++i)
3321 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3322 != (SEC_CODE | SEC_ALLOC))
3323 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3324 break;
3325 codesecsymend = i;
3326
3327 for (; i < symcount; ++i)
3328 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3329 break;
3330 secsymend = i;
3331
3332 if (opd != NULL)
3333 for (; i < symcount; ++i)
3334 if (strcmp (syms[i]->section->name, ".opd") != 0)
3335 break;
3336 opdsymend = i;
3337
3338 for (; i < symcount; ++i)
3339 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3340 != (SEC_CODE | SEC_ALLOC))
3341 break;
3342 symcount = i;
3343
3344 count = 0;
3345
3346 if (relocatable)
3347 {
3348 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3349 arelent *r;
3350 size_t size;
3351 long relcount;
3352
3353 if (opdsymend == secsymend)
3354 goto done;
3355
3356 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3357 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3358 if (relcount == 0)
3359 goto done;
3360
3361 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3362 {
3363 count = -1;
3364 goto done;
3365 }
3366
3367 size = 0;
3368 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3369 {
3370 asymbol *sym;
3371
3372 while (r < opd->relocation + relcount
3373 && r->address < syms[i]->value + opd->vma)
3374 ++r;
3375
3376 if (r == opd->relocation + relcount)
3377 break;
3378
3379 if (r->address != syms[i]->value + opd->vma)
3380 continue;
3381
3382 if (r->howto->type != R_PPC64_ADDR64)
3383 continue;
3384
3385 sym = *r->sym_ptr_ptr;
3386 if (!sym_exists_at (syms, opdsymend, symcount,
3387 sym->section->id, sym->value + r->addend))
3388 {
3389 ++count;
3390 size += sizeof (asymbol);
3391 size += strlen (syms[i]->name) + 2;
3392 }
3393 }
3394
3395 if (size == 0)
3396 goto done;
3397 s = *ret = bfd_malloc (size);
3398 if (s == NULL)
3399 {
3400 count = -1;
3401 goto done;
3402 }
3403
3404 names = (char *) (s + count);
3405
3406 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3407 {
3408 asymbol *sym;
3409
3410 while (r < opd->relocation + relcount
3411 && r->address < syms[i]->value + opd->vma)
3412 ++r;
3413
3414 if (r == opd->relocation + relcount)
3415 break;
3416
3417 if (r->address != syms[i]->value + opd->vma)
3418 continue;
3419
3420 if (r->howto->type != R_PPC64_ADDR64)
3421 continue;
3422
3423 sym = *r->sym_ptr_ptr;
3424 if (!sym_exists_at (syms, opdsymend, symcount,
3425 sym->section->id, sym->value + r->addend))
3426 {
3427 size_t len;
3428
3429 *s = *syms[i];
3430 s->flags |= BSF_SYNTHETIC;
3431 s->section = sym->section;
3432 s->value = sym->value + r->addend;
3433 s->name = names;
3434 *names++ = '.';
3435 len = strlen (syms[i]->name);
3436 memcpy (names, syms[i]->name, len + 1);
3437 names += len + 1;
3438 /* Have udata.p point back to the original symbol this
3439 synthetic symbol was derived from. */
3440 s->udata.p = syms[i];
3441 s++;
3442 }
3443 }
3444 }
3445 else
3446 {
3447 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3448 bfd_byte *contents = NULL;
3449 size_t size;
3450 long plt_count = 0;
3451 bfd_vma glink_vma = 0, resolv_vma = 0;
3452 asection *dynamic, *glink = NULL, *relplt = NULL;
3453 arelent *p;
3454
3455 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3456 {
3457 free_contents_and_exit_err:
3458 count = -1;
3459 free_contents_and_exit:
3460 if (contents)
3461 free (contents);
3462 goto done;
3463 }
3464
3465 size = 0;
3466 for (i = secsymend; i < opdsymend; ++i)
3467 {
3468 bfd_vma ent;
3469
3470 /* Ignore bogus symbols. */
3471 if (syms[i]->value > opd->size - 8)
3472 continue;
3473
3474 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3475 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3476 {
3477 ++count;
3478 size += sizeof (asymbol);
3479 size += strlen (syms[i]->name) + 2;
3480 }
3481 }
3482
3483 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3484 if (dyn_count != 0
3485 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3486 {
3487 bfd_byte *dynbuf, *extdyn, *extdynend;
3488 size_t extdynsize;
3489 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3490
3491 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3492 goto free_contents_and_exit_err;
3493
3494 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3495 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3496
3497 extdyn = dynbuf;
3498 extdynend = extdyn + dynamic->size;
3499 for (; extdyn < extdynend; extdyn += extdynsize)
3500 {
3501 Elf_Internal_Dyn dyn;
3502 (*swap_dyn_in) (abfd, extdyn, &dyn);
3503
3504 if (dyn.d_tag == DT_NULL)
3505 break;
3506
3507 if (dyn.d_tag == DT_PPC64_GLINK)
3508 {
3509 /* The first glink stub starts at offset 32; see
3510 comment in ppc64_elf_finish_dynamic_sections. */
3511 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3512 /* The .glink section usually does not survive the final
3513 link; search for the section (usually .text) where the
3514 glink stubs now reside. */
3515 glink = bfd_sections_find_if (abfd, section_covers_vma,
3516 &glink_vma);
3517 break;
3518 }
3519 }
3520
3521 free (dynbuf);
3522 }
3523
3524 if (glink != NULL)
3525 {
3526 /* Determine __glink trampoline by reading the relative branch
3527 from the first glink stub. */
3528 bfd_byte buf[4];
3529 unsigned int off = 0;
3530
3531 while (bfd_get_section_contents (abfd, glink, buf,
3532 glink_vma + off - glink->vma, 4))
3533 {
3534 unsigned int insn = bfd_get_32 (abfd, buf);
3535 insn ^= B_DOT;
3536 if ((insn & ~0x3fffffc) == 0)
3537 {
3538 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3539 break;
3540 }
3541 off += 4;
3542 if (off > 4)
3543 break;
3544 }
3545
3546 if (resolv_vma)
3547 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3548
3549 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3550 if (relplt != NULL)
3551 {
3552 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3553 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3554 goto free_contents_and_exit_err;
3555
3556 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3557 size += plt_count * sizeof (asymbol);
3558
3559 p = relplt->relocation;
3560 for (i = 0; i < plt_count; i++, p++)
3561 {
3562 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3563 if (p->addend != 0)
3564 size += sizeof ("+0x") - 1 + 16;
3565 }
3566 }
3567 }
3568
3569 if (size == 0)
3570 goto free_contents_and_exit;
3571 s = *ret = bfd_malloc (size);
3572 if (s == NULL)
3573 goto free_contents_and_exit_err;
3574
3575 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3576
3577 for (i = secsymend; i < opdsymend; ++i)
3578 {
3579 bfd_vma ent;
3580
3581 if (syms[i]->value > opd->size - 8)
3582 continue;
3583
3584 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3585 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3586 {
3587 long lo, hi;
3588 size_t len;
3589 asection *sec = abfd->sections;
3590
3591 *s = *syms[i];
3592 lo = codesecsym;
3593 hi = codesecsymend;
3594 while (lo < hi)
3595 {
3596 long mid = (lo + hi) >> 1;
3597 if (syms[mid]->section->vma < ent)
3598 lo = mid + 1;
3599 else if (syms[mid]->section->vma > ent)
3600 hi = mid;
3601 else
3602 {
3603 sec = syms[mid]->section;
3604 break;
3605 }
3606 }
3607
3608 if (lo >= hi && lo > codesecsym)
3609 sec = syms[lo - 1]->section;
3610
3611 for (; sec != NULL; sec = sec->next)
3612 {
3613 if (sec->vma > ent)
3614 break;
3615 /* SEC_LOAD may not be set if SEC is from a separate debug
3616 info file. */
3617 if ((sec->flags & SEC_ALLOC) == 0)
3618 break;
3619 if ((sec->flags & SEC_CODE) != 0)
3620 s->section = sec;
3621 }
3622 s->flags |= BSF_SYNTHETIC;
3623 s->value = ent - s->section->vma;
3624 s->name = names;
3625 *names++ = '.';
3626 len = strlen (syms[i]->name);
3627 memcpy (names, syms[i]->name, len + 1);
3628 names += len + 1;
3629 /* Have udata.p point back to the original symbol this
3630 synthetic symbol was derived from. */
3631 s->udata.p = syms[i];
3632 s++;
3633 }
3634 }
3635 free (contents);
3636
3637 if (glink != NULL && relplt != NULL)
3638 {
3639 if (resolv_vma)
3640 {
3641 /* Add a symbol for the main glink trampoline. */
3642 memset (s, 0, sizeof *s);
3643 s->the_bfd = abfd;
3644 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3645 s->section = glink;
3646 s->value = resolv_vma - glink->vma;
3647 s->name = names;
3648 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3649 names += sizeof ("__glink_PLTresolve");
3650 s++;
3651 count++;
3652 }
3653
3654 /* FIXME: It would be very much nicer to put sym@plt on the
3655 stub rather than on the glink branch table entry. The
3656 objdump disassembler would then use a sensible symbol
3657 name on plt calls. The difficulty in doing so is
3658 a) finding the stubs, and,
3659 b) matching stubs against plt entries, and,
3660 c) there can be multiple stubs for a given plt entry.
3661
3662 Solving (a) could be done by code scanning, but older
3663 ppc64 binaries used different stubs to current code.
3664 (b) is the tricky one since you need to known the toc
3665 pointer for at least one function that uses a pic stub to
3666 be able to calculate the plt address referenced.
3667 (c) means gdb would need to set multiple breakpoints (or
3668 find the glink branch itself) when setting breakpoints
3669 for pending shared library loads. */
3670 p = relplt->relocation;
3671 for (i = 0; i < plt_count; i++, p++)
3672 {
3673 size_t len;
3674
3675 *s = **p->sym_ptr_ptr;
3676 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3677 we are defining a symbol, ensure one of them is set. */
3678 if ((s->flags & BSF_LOCAL) == 0)
3679 s->flags |= BSF_GLOBAL;
3680 s->flags |= BSF_SYNTHETIC;
3681 s->section = glink;
3682 s->value = glink_vma - glink->vma;
3683 s->name = names;
3684 s->udata.p = NULL;
3685 len = strlen ((*p->sym_ptr_ptr)->name);
3686 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3687 names += len;
3688 if (p->addend != 0)
3689 {
3690 memcpy (names, "+0x", sizeof ("+0x") - 1);
3691 names += sizeof ("+0x") - 1;
3692 bfd_sprintf_vma (abfd, names, p->addend);
3693 names += strlen (names);
3694 }
3695 memcpy (names, "@plt", sizeof ("@plt"));
3696 names += sizeof ("@plt");
3697 s++;
3698 if (abi < 2)
3699 {
3700 glink_vma += 8;
3701 if (i >= 0x8000)
3702 glink_vma += 4;
3703 }
3704 else
3705 glink_vma += 4;
3706 }
3707 count += plt_count;
3708 }
3709 }
3710
3711 done:
3712 free (syms);
3713 return count;
3714 }
3715 \f
3716 /* The following functions are specific to the ELF linker, while
3717 functions above are used generally. Those named ppc64_elf_* are
3718 called by the main ELF linker code. They appear in this file more
3719 or less in the order in which they are called. eg.
3720 ppc64_elf_check_relocs is called early in the link process,
3721 ppc64_elf_finish_dynamic_sections is one of the last functions
3722 called.
3723
3724 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3725 functions have both a function code symbol and a function descriptor
3726 symbol. A call to foo in a relocatable object file looks like:
3727
3728 . .text
3729 . x:
3730 . bl .foo
3731 . nop
3732
3733 The function definition in another object file might be:
3734
3735 . .section .opd
3736 . foo: .quad .foo
3737 . .quad .TOC.@tocbase
3738 . .quad 0
3739 .
3740 . .text
3741 . .foo: blr
3742
3743 When the linker resolves the call during a static link, the branch
3744 unsurprisingly just goes to .foo and the .opd information is unused.
3745 If the function definition is in a shared library, things are a little
3746 different: The call goes via a plt call stub, the opd information gets
3747 copied to the plt, and the linker patches the nop.
3748
3749 . x:
3750 . bl .foo_stub
3751 . ld 2,40(1)
3752 .
3753 .
3754 . .foo_stub:
3755 . std 2,40(1) # in practice, the call stub
3756 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3757 . addi 11,11,Lfoo@toc@l # this is the general idea
3758 . ld 12,0(11)
3759 . ld 2,8(11)
3760 . mtctr 12
3761 . ld 11,16(11)
3762 . bctr
3763 .
3764 . .section .plt
3765 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3766
3767 The "reloc ()" notation is supposed to indicate that the linker emits
3768 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3769 copying.
3770
3771 What are the difficulties here? Well, firstly, the relocations
3772 examined by the linker in check_relocs are against the function code
3773 sym .foo, while the dynamic relocation in the plt is emitted against
3774 the function descriptor symbol, foo. Somewhere along the line, we need
3775 to carefully copy dynamic link information from one symbol to the other.
3776 Secondly, the generic part of the elf linker will make .foo a dynamic
3777 symbol as is normal for most other backends. We need foo dynamic
3778 instead, at least for an application final link. However, when
3779 creating a shared library containing foo, we need to have both symbols
3780 dynamic so that references to .foo are satisfied during the early
3781 stages of linking. Otherwise the linker might decide to pull in a
3782 definition from some other object, eg. a static library.
3783
3784 Update: As of August 2004, we support a new convention. Function
3785 calls may use the function descriptor symbol, ie. "bl foo". This
3786 behaves exactly as "bl .foo". */
3787
3788 /* Of those relocs that might be copied as dynamic relocs, this function
3789 selects those that must be copied when linking a shared library,
3790 even when the symbol is local. */
3791
3792 static int
3793 must_be_dyn_reloc (struct bfd_link_info *info,
3794 enum elf_ppc64_reloc_type r_type)
3795 {
3796 switch (r_type)
3797 {
3798 default:
3799 return 1;
3800
3801 case R_PPC64_REL32:
3802 case R_PPC64_REL64:
3803 case R_PPC64_REL30:
3804 return 0;
3805
3806 case R_PPC64_TPREL16:
3807 case R_PPC64_TPREL16_LO:
3808 case R_PPC64_TPREL16_HI:
3809 case R_PPC64_TPREL16_HA:
3810 case R_PPC64_TPREL16_DS:
3811 case R_PPC64_TPREL16_LO_DS:
3812 case R_PPC64_TPREL16_HIGH:
3813 case R_PPC64_TPREL16_HIGHA:
3814 case R_PPC64_TPREL16_HIGHER:
3815 case R_PPC64_TPREL16_HIGHERA:
3816 case R_PPC64_TPREL16_HIGHEST:
3817 case R_PPC64_TPREL16_HIGHESTA:
3818 case R_PPC64_TPREL64:
3819 return !bfd_link_executable (info);
3820 }
3821 }
3822
3823 /* Whether an undefined weak symbol should resolve to its link-time
3824 value, even in PIC or PIE objects. */
3825 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
3826 ((H)->root.type == bfd_link_hash_undefweak \
3827 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
3828 || (INFO)->dynamic_undefined_weak == 0))
3829
3830 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3831 copying dynamic variables from a shared lib into an app's dynbss
3832 section, and instead use a dynamic relocation to point into the
3833 shared lib. With code that gcc generates, it's vital that this be
3834 enabled; In the PowerPC64 ABI, the address of a function is actually
3835 the address of a function descriptor, which resides in the .opd
3836 section. gcc uses the descriptor directly rather than going via the
3837 GOT as some other ABI's do, which means that initialized function
3838 pointers must reference the descriptor. Thus, a function pointer
3839 initialized to the address of a function in a shared library will
3840 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3841 redefines the function descriptor symbol to point to the copy. This
3842 presents a problem as a plt entry for that function is also
3843 initialized from the function descriptor symbol and the copy reloc
3844 may not be initialized first. */
3845 #define ELIMINATE_COPY_RELOCS 1
3846
3847 /* Section name for stubs is the associated section name plus this
3848 string. */
3849 #define STUB_SUFFIX ".stub"
3850
3851 /* Linker stubs.
3852 ppc_stub_long_branch:
3853 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3854 destination, but a 24 bit branch in a stub section will reach.
3855 . b dest
3856
3857 ppc_stub_plt_branch:
3858 Similar to the above, but a 24 bit branch in the stub section won't
3859 reach its destination.
3860 . addis %r11,%r2,xxx@toc@ha
3861 . ld %r12,xxx@toc@l(%r11)
3862 . mtctr %r12
3863 . bctr
3864
3865 ppc_stub_plt_call:
3866 Used to call a function in a shared library. If it so happens that
3867 the plt entry referenced crosses a 64k boundary, then an extra
3868 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3869 . std %r2,40(%r1)
3870 . addis %r11,%r2,xxx@toc@ha
3871 . ld %r12,xxx+0@toc@l(%r11)
3872 . mtctr %r12
3873 . ld %r2,xxx+8@toc@l(%r11)
3874 . ld %r11,xxx+16@toc@l(%r11)
3875 . bctr
3876
3877 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3878 code to adjust the value and save r2 to support multiple toc sections.
3879 A ppc_stub_long_branch with an r2 offset looks like:
3880 . std %r2,40(%r1)
3881 . addis %r2,%r2,off@ha
3882 . addi %r2,%r2,off@l
3883 . b dest
3884
3885 A ppc_stub_plt_branch with an r2 offset looks like:
3886 . std %r2,40(%r1)
3887 . addis %r11,%r2,xxx@toc@ha
3888 . ld %r12,xxx@toc@l(%r11)
3889 . addis %r2,%r2,off@ha
3890 . addi %r2,%r2,off@l
3891 . mtctr %r12
3892 . bctr
3893
3894 In cases where the "addis" instruction would add zero, the "addis" is
3895 omitted and following instructions modified slightly in some cases.
3896 */
3897
3898 enum ppc_stub_type {
3899 ppc_stub_none,
3900 ppc_stub_long_branch,
3901 ppc_stub_long_branch_r2off,
3902 ppc_stub_plt_branch,
3903 ppc_stub_plt_branch_r2off,
3904 ppc_stub_plt_call,
3905 ppc_stub_plt_call_r2save,
3906 ppc_stub_global_entry,
3907 ppc_stub_save_res
3908 };
3909
3910 /* Information on stub grouping. */
3911 struct map_stub
3912 {
3913 /* The stub section. */
3914 asection *stub_sec;
3915 /* This is the section to which stubs in the group will be attached. */
3916 asection *link_sec;
3917 /* Next group. */
3918 struct map_stub *next;
3919 /* Whether to emit a copy of register save/restore functions in this
3920 group. */
3921 int needs_save_res;
3922 };
3923
3924 struct ppc_stub_hash_entry {
3925
3926 /* Base hash table entry structure. */
3927 struct bfd_hash_entry root;
3928
3929 enum ppc_stub_type stub_type;
3930
3931 /* Group information. */
3932 struct map_stub *group;
3933
3934 /* Offset within stub_sec of the beginning of this stub. */
3935 bfd_vma stub_offset;
3936
3937 /* Given the symbol's value and its section we can determine its final
3938 value when building the stubs (so the stub knows where to jump. */
3939 bfd_vma target_value;
3940 asection *target_section;
3941
3942 /* The symbol table entry, if any, that this was derived from. */
3943 struct ppc_link_hash_entry *h;
3944 struct plt_entry *plt_ent;
3945
3946 /* Symbol st_other. */
3947 unsigned char other;
3948 };
3949
3950 struct ppc_branch_hash_entry {
3951
3952 /* Base hash table entry structure. */
3953 struct bfd_hash_entry root;
3954
3955 /* Offset within branch lookup table. */
3956 unsigned int offset;
3957
3958 /* Generation marker. */
3959 unsigned int iter;
3960 };
3961
3962 /* Used to track dynamic relocations for local symbols. */
3963 struct ppc_dyn_relocs
3964 {
3965 struct ppc_dyn_relocs *next;
3966
3967 /* The input section of the reloc. */
3968 asection *sec;
3969
3970 /* Total number of relocs copied for the input section. */
3971 unsigned int count : 31;
3972
3973 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3974 unsigned int ifunc : 1;
3975 };
3976
3977 struct ppc_link_hash_entry
3978 {
3979 struct elf_link_hash_entry elf;
3980
3981 union {
3982 /* A pointer to the most recently used stub hash entry against this
3983 symbol. */
3984 struct ppc_stub_hash_entry *stub_cache;
3985
3986 /* A pointer to the next symbol starting with a '.' */
3987 struct ppc_link_hash_entry *next_dot_sym;
3988 } u;
3989
3990 /* Track dynamic relocs copied for this symbol. */
3991 struct elf_dyn_relocs *dyn_relocs;
3992
3993 /* Chain of aliases referring to a weakdef. */
3994 struct ppc_link_hash_entry *weakref;
3995
3996 /* Link between function code and descriptor symbols. */
3997 struct ppc_link_hash_entry *oh;
3998
3999 /* Flag function code and descriptor symbols. */
4000 unsigned int is_func:1;
4001 unsigned int is_func_descriptor:1;
4002 unsigned int fake:1;
4003
4004 /* Whether global opd/toc sym has been adjusted or not.
4005 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4006 should be set for all globals defined in any opd/toc section. */
4007 unsigned int adjust_done:1;
4008
4009 /* Set if this is an out-of-line register save/restore function,
4010 with non-standard calling convention. */
4011 unsigned int save_res:1;
4012
4013 /* Contexts in which symbol is used in the GOT (or TOC).
4014 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4015 corresponding relocs are encountered during check_relocs.
4016 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4017 indicate the corresponding GOT entry type is not needed.
4018 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4019 a TPREL one. We use a separate flag rather than setting TPREL
4020 just for convenience in distinguishing the two cases. */
4021 #define TLS_GD 1 /* GD reloc. */
4022 #define TLS_LD 2 /* LD reloc. */
4023 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4024 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4025 #define TLS_TLS 16 /* Any TLS reloc. */
4026 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4027 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4028 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4029 unsigned char tls_mask;
4030 };
4031
4032 /* ppc64 ELF linker hash table. */
4033
4034 struct ppc_link_hash_table
4035 {
4036 struct elf_link_hash_table elf;
4037
4038 /* The stub hash table. */
4039 struct bfd_hash_table stub_hash_table;
4040
4041 /* Another hash table for plt_branch stubs. */
4042 struct bfd_hash_table branch_hash_table;
4043
4044 /* Hash table for function prologue tocsave. */
4045 htab_t tocsave_htab;
4046
4047 /* Various options and other info passed from the linker. */
4048 struct ppc64_elf_params *params;
4049
4050 /* The size of sec_info below. */
4051 unsigned int sec_info_arr_size;
4052
4053 /* Per-section array of extra section info. Done this way rather
4054 than as part of ppc64_elf_section_data so we have the info for
4055 non-ppc64 sections. */
4056 struct
4057 {
4058 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4059 bfd_vma toc_off;
4060
4061 union
4062 {
4063 /* The section group that this section belongs to. */
4064 struct map_stub *group;
4065 /* A temp section list pointer. */
4066 asection *list;
4067 } u;
4068 } *sec_info;
4069
4070 /* Linked list of groups. */
4071 struct map_stub *group;
4072
4073 /* Temp used when calculating TOC pointers. */
4074 bfd_vma toc_curr;
4075 bfd *toc_bfd;
4076 asection *toc_first_sec;
4077
4078 /* Used when adding symbols. */
4079 struct ppc_link_hash_entry *dot_syms;
4080
4081 /* Shortcuts to get to dynamic linker sections. */
4082 asection *glink;
4083 asection *sfpr;
4084 asection *brlt;
4085 asection *relbrlt;
4086 asection *glink_eh_frame;
4087
4088 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4089 struct ppc_link_hash_entry *tls_get_addr;
4090 struct ppc_link_hash_entry *tls_get_addr_fd;
4091
4092 /* The size of reliplt used by got entry relocs. */
4093 bfd_size_type got_reli_size;
4094
4095 /* Statistics. */
4096 unsigned long stub_count[ppc_stub_global_entry];
4097
4098 /* Number of stubs against global syms. */
4099 unsigned long stub_globals;
4100
4101 /* Set if we're linking code with function descriptors. */
4102 unsigned int opd_abi:1;
4103
4104 /* Support for multiple toc sections. */
4105 unsigned int do_multi_toc:1;
4106 unsigned int multi_toc_needed:1;
4107 unsigned int second_toc_pass:1;
4108 unsigned int do_toc_opt:1;
4109
4110 /* Set on error. */
4111 unsigned int stub_error:1;
4112
4113 /* Whether func_desc_adjust needs to be run over symbols. */
4114 unsigned int need_func_desc_adj:1;
4115
4116 /* Whether there exist local gnu indirect function resolvers,
4117 referenced by dynamic relocations. */
4118 unsigned int local_ifunc_resolver:1;
4119 unsigned int maybe_local_ifunc_resolver:1;
4120
4121 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4122 unsigned int has_plt_localentry0:1;
4123
4124 /* Incremented every time we size stubs. */
4125 unsigned int stub_iteration;
4126
4127 /* Small local sym cache. */
4128 struct sym_cache sym_cache;
4129 };
4130
4131 /* Rename some of the generic section flags to better document how they
4132 are used here. */
4133
4134 /* Nonzero if this section has TLS related relocations. */
4135 #define has_tls_reloc sec_flg0
4136
4137 /* Nonzero if this section has a call to __tls_get_addr. */
4138 #define has_tls_get_addr_call sec_flg1
4139
4140 /* Nonzero if this section has any toc or got relocs. */
4141 #define has_toc_reloc sec_flg2
4142
4143 /* Nonzero if this section has a call to another section that uses
4144 the toc or got. */
4145 #define makes_toc_func_call sec_flg3
4146
4147 /* Recursion protection when determining above flag. */
4148 #define call_check_in_progress sec_flg4
4149 #define call_check_done sec_flg5
4150
4151 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4152
4153 #define ppc_hash_table(p) \
4154 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4155 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4156
4157 #define ppc_stub_hash_lookup(table, string, create, copy) \
4158 ((struct ppc_stub_hash_entry *) \
4159 bfd_hash_lookup ((table), (string), (create), (copy)))
4160
4161 #define ppc_branch_hash_lookup(table, string, create, copy) \
4162 ((struct ppc_branch_hash_entry *) \
4163 bfd_hash_lookup ((table), (string), (create), (copy)))
4164
4165 /* Create an entry in the stub hash table. */
4166
4167 static struct bfd_hash_entry *
4168 stub_hash_newfunc (struct bfd_hash_entry *entry,
4169 struct bfd_hash_table *table,
4170 const char *string)
4171 {
4172 /* Allocate the structure if it has not already been allocated by a
4173 subclass. */
4174 if (entry == NULL)
4175 {
4176 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4177 if (entry == NULL)
4178 return entry;
4179 }
4180
4181 /* Call the allocation method of the superclass. */
4182 entry = bfd_hash_newfunc (entry, table, string);
4183 if (entry != NULL)
4184 {
4185 struct ppc_stub_hash_entry *eh;
4186
4187 /* Initialize the local fields. */
4188 eh = (struct ppc_stub_hash_entry *) entry;
4189 eh->stub_type = ppc_stub_none;
4190 eh->group = NULL;
4191 eh->stub_offset = 0;
4192 eh->target_value = 0;
4193 eh->target_section = NULL;
4194 eh->h = NULL;
4195 eh->plt_ent = NULL;
4196 eh->other = 0;
4197 }
4198
4199 return entry;
4200 }
4201
4202 /* Create an entry in the branch hash table. */
4203
4204 static struct bfd_hash_entry *
4205 branch_hash_newfunc (struct bfd_hash_entry *entry,
4206 struct bfd_hash_table *table,
4207 const char *string)
4208 {
4209 /* Allocate the structure if it has not already been allocated by a
4210 subclass. */
4211 if (entry == NULL)
4212 {
4213 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4214 if (entry == NULL)
4215 return entry;
4216 }
4217
4218 /* Call the allocation method of the superclass. */
4219 entry = bfd_hash_newfunc (entry, table, string);
4220 if (entry != NULL)
4221 {
4222 struct ppc_branch_hash_entry *eh;
4223
4224 /* Initialize the local fields. */
4225 eh = (struct ppc_branch_hash_entry *) entry;
4226 eh->offset = 0;
4227 eh->iter = 0;
4228 }
4229
4230 return entry;
4231 }
4232
4233 /* Create an entry in a ppc64 ELF linker hash table. */
4234
4235 static struct bfd_hash_entry *
4236 link_hash_newfunc (struct bfd_hash_entry *entry,
4237 struct bfd_hash_table *table,
4238 const char *string)
4239 {
4240 /* Allocate the structure if it has not already been allocated by a
4241 subclass. */
4242 if (entry == NULL)
4243 {
4244 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4245 if (entry == NULL)
4246 return entry;
4247 }
4248
4249 /* Call the allocation method of the superclass. */
4250 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4251 if (entry != NULL)
4252 {
4253 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4254
4255 memset (&eh->u.stub_cache, 0,
4256 (sizeof (struct ppc_link_hash_entry)
4257 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4258
4259 /* When making function calls, old ABI code references function entry
4260 points (dot symbols), while new ABI code references the function
4261 descriptor symbol. We need to make any combination of reference and
4262 definition work together, without breaking archive linking.
4263
4264 For a defined function "foo" and an undefined call to "bar":
4265 An old object defines "foo" and ".foo", references ".bar" (possibly
4266 "bar" too).
4267 A new object defines "foo" and references "bar".
4268
4269 A new object thus has no problem with its undefined symbols being
4270 satisfied by definitions in an old object. On the other hand, the
4271 old object won't have ".bar" satisfied by a new object.
4272
4273 Keep a list of newly added dot-symbols. */
4274
4275 if (string[0] == '.')
4276 {
4277 struct ppc_link_hash_table *htab;
4278
4279 htab = (struct ppc_link_hash_table *) table;
4280 eh->u.next_dot_sym = htab->dot_syms;
4281 htab->dot_syms = eh;
4282 }
4283 }
4284
4285 return entry;
4286 }
4287
4288 struct tocsave_entry {
4289 asection *sec;
4290 bfd_vma offset;
4291 };
4292
4293 static hashval_t
4294 tocsave_htab_hash (const void *p)
4295 {
4296 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4297 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4298 }
4299
4300 static int
4301 tocsave_htab_eq (const void *p1, const void *p2)
4302 {
4303 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4304 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4305 return e1->sec == e2->sec && e1->offset == e2->offset;
4306 }
4307
4308 /* Destroy a ppc64 ELF linker hash table. */
4309
4310 static void
4311 ppc64_elf_link_hash_table_free (bfd *obfd)
4312 {
4313 struct ppc_link_hash_table *htab;
4314
4315 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4316 if (htab->tocsave_htab)
4317 htab_delete (htab->tocsave_htab);
4318 bfd_hash_table_free (&htab->branch_hash_table);
4319 bfd_hash_table_free (&htab->stub_hash_table);
4320 _bfd_elf_link_hash_table_free (obfd);
4321 }
4322
4323 /* Create a ppc64 ELF linker hash table. */
4324
4325 static struct bfd_link_hash_table *
4326 ppc64_elf_link_hash_table_create (bfd *abfd)
4327 {
4328 struct ppc_link_hash_table *htab;
4329 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4330
4331 htab = bfd_zmalloc (amt);
4332 if (htab == NULL)
4333 return NULL;
4334
4335 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4336 sizeof (struct ppc_link_hash_entry),
4337 PPC64_ELF_DATA))
4338 {
4339 free (htab);
4340 return NULL;
4341 }
4342
4343 /* Init the stub hash table too. */
4344 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4345 sizeof (struct ppc_stub_hash_entry)))
4346 {
4347 _bfd_elf_link_hash_table_free (abfd);
4348 return NULL;
4349 }
4350
4351 /* And the branch hash table. */
4352 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4353 sizeof (struct ppc_branch_hash_entry)))
4354 {
4355 bfd_hash_table_free (&htab->stub_hash_table);
4356 _bfd_elf_link_hash_table_free (abfd);
4357 return NULL;
4358 }
4359
4360 htab->tocsave_htab = htab_try_create (1024,
4361 tocsave_htab_hash,
4362 tocsave_htab_eq,
4363 NULL);
4364 if (htab->tocsave_htab == NULL)
4365 {
4366 ppc64_elf_link_hash_table_free (abfd);
4367 return NULL;
4368 }
4369 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4370
4371 /* Initializing two fields of the union is just cosmetic. We really
4372 only care about glist, but when compiled on a 32-bit host the
4373 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4374 debugger inspection of these fields look nicer. */
4375 htab->elf.init_got_refcount.refcount = 0;
4376 htab->elf.init_got_refcount.glist = NULL;
4377 htab->elf.init_plt_refcount.refcount = 0;
4378 htab->elf.init_plt_refcount.glist = NULL;
4379 htab->elf.init_got_offset.offset = 0;
4380 htab->elf.init_got_offset.glist = NULL;
4381 htab->elf.init_plt_offset.offset = 0;
4382 htab->elf.init_plt_offset.glist = NULL;
4383
4384 return &htab->elf.root;
4385 }
4386
4387 /* Create sections for linker generated code. */
4388
4389 static bfd_boolean
4390 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4391 {
4392 struct ppc_link_hash_table *htab;
4393 flagword flags;
4394
4395 htab = ppc_hash_table (info);
4396
4397 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4398 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4399 if (htab->params->save_restore_funcs)
4400 {
4401 /* Create .sfpr for code to save and restore fp regs. */
4402 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4403 flags);
4404 if (htab->sfpr == NULL
4405 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4406 return FALSE;
4407 }
4408
4409 if (bfd_link_relocatable (info))
4410 return TRUE;
4411
4412 /* Create .glink for lazy dynamic linking support. */
4413 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4414 flags);
4415 if (htab->glink == NULL
4416 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4417 return FALSE;
4418
4419 if (!info->no_ld_generated_unwind_info)
4420 {
4421 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4422 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4423 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4424 ".eh_frame",
4425 flags);
4426 if (htab->glink_eh_frame == NULL
4427 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4428 return FALSE;
4429 }
4430
4431 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4432 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4433 if (htab->elf.iplt == NULL
4434 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4435 return FALSE;
4436
4437 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4438 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4439 htab->elf.irelplt
4440 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4441 if (htab->elf.irelplt == NULL
4442 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4443 return FALSE;
4444
4445 /* Create branch lookup table for plt_branch stubs. */
4446 flags = (SEC_ALLOC | SEC_LOAD
4447 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4448 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4449 flags);
4450 if (htab->brlt == NULL
4451 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4452 return FALSE;
4453
4454 if (!bfd_link_pic (info))
4455 return TRUE;
4456
4457 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4458 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4459 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4460 ".rela.branch_lt",
4461 flags);
4462 if (htab->relbrlt == NULL
4463 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4464 return FALSE;
4465
4466 return TRUE;
4467 }
4468
4469 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4470
4471 bfd_boolean
4472 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4473 struct ppc64_elf_params *params)
4474 {
4475 struct ppc_link_hash_table *htab;
4476
4477 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4478
4479 /* Always hook our dynamic sections into the first bfd, which is the
4480 linker created stub bfd. This ensures that the GOT header is at
4481 the start of the output TOC section. */
4482 htab = ppc_hash_table (info);
4483 htab->elf.dynobj = params->stub_bfd;
4484 htab->params = params;
4485
4486 return create_linkage_sections (htab->elf.dynobj, info);
4487 }
4488
4489 /* Build a name for an entry in the stub hash table. */
4490
4491 static char *
4492 ppc_stub_name (const asection *input_section,
4493 const asection *sym_sec,
4494 const struct ppc_link_hash_entry *h,
4495 const Elf_Internal_Rela *rel)
4496 {
4497 char *stub_name;
4498 ssize_t len;
4499
4500 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4501 offsets from a sym as a branch target? In fact, we could
4502 probably assume the addend is always zero. */
4503 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4504
4505 if (h)
4506 {
4507 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4508 stub_name = bfd_malloc (len);
4509 if (stub_name == NULL)
4510 return stub_name;
4511
4512 len = sprintf (stub_name, "%08x.%s+%x",
4513 input_section->id & 0xffffffff,
4514 h->elf.root.root.string,
4515 (int) rel->r_addend & 0xffffffff);
4516 }
4517 else
4518 {
4519 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4520 stub_name = bfd_malloc (len);
4521 if (stub_name == NULL)
4522 return stub_name;
4523
4524 len = sprintf (stub_name, "%08x.%x:%x+%x",
4525 input_section->id & 0xffffffff,
4526 sym_sec->id & 0xffffffff,
4527 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4528 (int) rel->r_addend & 0xffffffff);
4529 }
4530 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4531 stub_name[len - 2] = 0;
4532 return stub_name;
4533 }
4534
4535 /* Look up an entry in the stub hash. Stub entries are cached because
4536 creating the stub name takes a bit of time. */
4537
4538 static struct ppc_stub_hash_entry *
4539 ppc_get_stub_entry (const asection *input_section,
4540 const asection *sym_sec,
4541 struct ppc_link_hash_entry *h,
4542 const Elf_Internal_Rela *rel,
4543 struct ppc_link_hash_table *htab)
4544 {
4545 struct ppc_stub_hash_entry *stub_entry;
4546 struct map_stub *group;
4547
4548 /* If this input section is part of a group of sections sharing one
4549 stub section, then use the id of the first section in the group.
4550 Stub names need to include a section id, as there may well be
4551 more than one stub used to reach say, printf, and we need to
4552 distinguish between them. */
4553 group = htab->sec_info[input_section->id].u.group;
4554 if (group == NULL)
4555 return NULL;
4556
4557 if (h != NULL && h->u.stub_cache != NULL
4558 && h->u.stub_cache->h == h
4559 && h->u.stub_cache->group == group)
4560 {
4561 stub_entry = h->u.stub_cache;
4562 }
4563 else
4564 {
4565 char *stub_name;
4566
4567 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4568 if (stub_name == NULL)
4569 return NULL;
4570
4571 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4572 stub_name, FALSE, FALSE);
4573 if (h != NULL)
4574 h->u.stub_cache = stub_entry;
4575
4576 free (stub_name);
4577 }
4578
4579 return stub_entry;
4580 }
4581
4582 /* Add a new stub entry to the stub hash. Not all fields of the new
4583 stub entry are initialised. */
4584
4585 static struct ppc_stub_hash_entry *
4586 ppc_add_stub (const char *stub_name,
4587 asection *section,
4588 struct bfd_link_info *info)
4589 {
4590 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4591 struct map_stub *group;
4592 asection *link_sec;
4593 asection *stub_sec;
4594 struct ppc_stub_hash_entry *stub_entry;
4595
4596 group = htab->sec_info[section->id].u.group;
4597 link_sec = group->link_sec;
4598 stub_sec = group->stub_sec;
4599 if (stub_sec == NULL)
4600 {
4601 size_t namelen;
4602 bfd_size_type len;
4603 char *s_name;
4604
4605 namelen = strlen (link_sec->name);
4606 len = namelen + sizeof (STUB_SUFFIX);
4607 s_name = bfd_alloc (htab->params->stub_bfd, len);
4608 if (s_name == NULL)
4609 return NULL;
4610
4611 memcpy (s_name, link_sec->name, namelen);
4612 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4613 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4614 if (stub_sec == NULL)
4615 return NULL;
4616 group->stub_sec = stub_sec;
4617 }
4618
4619 /* Enter this entry into the linker stub hash table. */
4620 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4621 TRUE, FALSE);
4622 if (stub_entry == NULL)
4623 {
4624 /* xgettext:c-format */
4625 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4626 section->owner, stub_name);
4627 return NULL;
4628 }
4629
4630 stub_entry->group = group;
4631 stub_entry->stub_offset = 0;
4632 return stub_entry;
4633 }
4634
4635 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4636 not already done. */
4637
4638 static bfd_boolean
4639 create_got_section (bfd *abfd, struct bfd_link_info *info)
4640 {
4641 asection *got, *relgot;
4642 flagword flags;
4643 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4644
4645 if (!is_ppc64_elf (abfd))
4646 return FALSE;
4647 if (htab == NULL)
4648 return FALSE;
4649
4650 if (!htab->elf.sgot
4651 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4652 return FALSE;
4653
4654 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4655 | SEC_LINKER_CREATED);
4656
4657 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4658 if (!got
4659 || !bfd_set_section_alignment (abfd, got, 3))
4660 return FALSE;
4661
4662 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4663 flags | SEC_READONLY);
4664 if (!relgot
4665 || ! bfd_set_section_alignment (abfd, relgot, 3))
4666 return FALSE;
4667
4668 ppc64_elf_tdata (abfd)->got = got;
4669 ppc64_elf_tdata (abfd)->relgot = relgot;
4670 return TRUE;
4671 }
4672
4673 /* Follow indirect and warning symbol links. */
4674
4675 static inline struct bfd_link_hash_entry *
4676 follow_link (struct bfd_link_hash_entry *h)
4677 {
4678 while (h->type == bfd_link_hash_indirect
4679 || h->type == bfd_link_hash_warning)
4680 h = h->u.i.link;
4681 return h;
4682 }
4683
4684 static inline struct elf_link_hash_entry *
4685 elf_follow_link (struct elf_link_hash_entry *h)
4686 {
4687 return (struct elf_link_hash_entry *) follow_link (&h->root);
4688 }
4689
4690 static inline struct ppc_link_hash_entry *
4691 ppc_follow_link (struct ppc_link_hash_entry *h)
4692 {
4693 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4694 }
4695
4696 /* Merge PLT info on FROM with that on TO. */
4697
4698 static void
4699 move_plt_plist (struct ppc_link_hash_entry *from,
4700 struct ppc_link_hash_entry *to)
4701 {
4702 if (from->elf.plt.plist != NULL)
4703 {
4704 if (to->elf.plt.plist != NULL)
4705 {
4706 struct plt_entry **entp;
4707 struct plt_entry *ent;
4708
4709 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4710 {
4711 struct plt_entry *dent;
4712
4713 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4714 if (dent->addend == ent->addend)
4715 {
4716 dent->plt.refcount += ent->plt.refcount;
4717 *entp = ent->next;
4718 break;
4719 }
4720 if (dent == NULL)
4721 entp = &ent->next;
4722 }
4723 *entp = to->elf.plt.plist;
4724 }
4725
4726 to->elf.plt.plist = from->elf.plt.plist;
4727 from->elf.plt.plist = NULL;
4728 }
4729 }
4730
4731 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4732
4733 static void
4734 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4735 struct elf_link_hash_entry *dir,
4736 struct elf_link_hash_entry *ind)
4737 {
4738 struct ppc_link_hash_entry *edir, *eind;
4739
4740 edir = (struct ppc_link_hash_entry *) dir;
4741 eind = (struct ppc_link_hash_entry *) ind;
4742
4743 edir->is_func |= eind->is_func;
4744 edir->is_func_descriptor |= eind->is_func_descriptor;
4745 edir->tls_mask |= eind->tls_mask;
4746 if (eind->oh != NULL)
4747 edir->oh = ppc_follow_link (eind->oh);
4748
4749 /* If called to transfer flags for a weakdef during processing
4750 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4751 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4752 if (!(ELIMINATE_COPY_RELOCS
4753 && eind->elf.root.type != bfd_link_hash_indirect
4754 && edir->elf.dynamic_adjusted))
4755 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4756
4757 if (edir->elf.versioned != versioned_hidden)
4758 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4759 edir->elf.ref_regular |= eind->elf.ref_regular;
4760 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4761 edir->elf.needs_plt |= eind->elf.needs_plt;
4762 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4763
4764 /* If we were called to copy over info for a weak sym, don't copy
4765 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4766 in order to simplify readonly_dynrelocs and save a field in the
4767 symbol hash entry, but that means dyn_relocs can't be used in any
4768 tests about a specific symbol, or affect other symbol flags which
4769 are then tested.
4770 Chain weakdefs so we can get from the weakdef back to an alias.
4771 The list is circular so that we don't need to use u.weakdef as
4772 well as this list to look at all aliases. */
4773 if (eind->elf.root.type != bfd_link_hash_indirect)
4774 {
4775 struct ppc_link_hash_entry *cur, *add, *next;
4776
4777 add = eind;
4778 do
4779 {
4780 cur = edir->weakref;
4781 if (cur != NULL)
4782 {
4783 do
4784 {
4785 /* We can be called twice for the same symbols.
4786 Don't make multiple loops. */
4787 if (cur == add)
4788 return;
4789 cur = cur->weakref;
4790 } while (cur != edir);
4791 }
4792 next = add->weakref;
4793 if (cur != add)
4794 {
4795 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4796 edir->weakref = add;
4797 }
4798 add = next;
4799 } while (add != NULL && add != eind);
4800 return;
4801 }
4802
4803 /* Copy over any dynamic relocs we may have on the indirect sym. */
4804 if (eind->dyn_relocs != NULL)
4805 {
4806 if (edir->dyn_relocs != NULL)
4807 {
4808 struct elf_dyn_relocs **pp;
4809 struct elf_dyn_relocs *p;
4810
4811 /* Add reloc counts against the indirect sym to the direct sym
4812 list. Merge any entries against the same section. */
4813 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4814 {
4815 struct elf_dyn_relocs *q;
4816
4817 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4818 if (q->sec == p->sec)
4819 {
4820 q->pc_count += p->pc_count;
4821 q->count += p->count;
4822 *pp = p->next;
4823 break;
4824 }
4825 if (q == NULL)
4826 pp = &p->next;
4827 }
4828 *pp = edir->dyn_relocs;
4829 }
4830
4831 edir->dyn_relocs = eind->dyn_relocs;
4832 eind->dyn_relocs = NULL;
4833 }
4834
4835 /* Copy over got entries that we may have already seen to the
4836 symbol which just became indirect. */
4837 if (eind->elf.got.glist != NULL)
4838 {
4839 if (edir->elf.got.glist != NULL)
4840 {
4841 struct got_entry **entp;
4842 struct got_entry *ent;
4843
4844 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4845 {
4846 struct got_entry *dent;
4847
4848 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4849 if (dent->addend == ent->addend
4850 && dent->owner == ent->owner
4851 && dent->tls_type == ent->tls_type)
4852 {
4853 dent->got.refcount += ent->got.refcount;
4854 *entp = ent->next;
4855 break;
4856 }
4857 if (dent == NULL)
4858 entp = &ent->next;
4859 }
4860 *entp = edir->elf.got.glist;
4861 }
4862
4863 edir->elf.got.glist = eind->elf.got.glist;
4864 eind->elf.got.glist = NULL;
4865 }
4866
4867 /* And plt entries. */
4868 move_plt_plist (eind, edir);
4869
4870 if (eind->elf.dynindx != -1)
4871 {
4872 if (edir->elf.dynindx != -1)
4873 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4874 edir->elf.dynstr_index);
4875 edir->elf.dynindx = eind->elf.dynindx;
4876 edir->elf.dynstr_index = eind->elf.dynstr_index;
4877 eind->elf.dynindx = -1;
4878 eind->elf.dynstr_index = 0;
4879 }
4880 }
4881
4882 /* Find the function descriptor hash entry from the given function code
4883 hash entry FH. Link the entries via their OH fields. */
4884
4885 static struct ppc_link_hash_entry *
4886 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4887 {
4888 struct ppc_link_hash_entry *fdh = fh->oh;
4889
4890 if (fdh == NULL)
4891 {
4892 const char *fd_name = fh->elf.root.root.string + 1;
4893
4894 fdh = (struct ppc_link_hash_entry *)
4895 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4896 if (fdh == NULL)
4897 return fdh;
4898
4899 fdh->is_func_descriptor = 1;
4900 fdh->oh = fh;
4901 fh->is_func = 1;
4902 fh->oh = fdh;
4903 }
4904
4905 fdh = ppc_follow_link (fdh);
4906 fdh->is_func_descriptor = 1;
4907 fdh->oh = fh;
4908 return fdh;
4909 }
4910
4911 /* Make a fake function descriptor sym for the undefined code sym FH. */
4912
4913 static struct ppc_link_hash_entry *
4914 make_fdh (struct bfd_link_info *info,
4915 struct ppc_link_hash_entry *fh)
4916 {
4917 bfd *abfd = fh->elf.root.u.undef.abfd;
4918 struct bfd_link_hash_entry *bh = NULL;
4919 struct ppc_link_hash_entry *fdh;
4920 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4921 ? BSF_WEAK
4922 : BSF_GLOBAL);
4923
4924 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4925 fh->elf.root.root.string + 1,
4926 flags, bfd_und_section_ptr, 0,
4927 NULL, FALSE, FALSE, &bh))
4928 return NULL;
4929
4930 fdh = (struct ppc_link_hash_entry *) bh;
4931 fdh->elf.non_elf = 0;
4932 fdh->fake = 1;
4933 fdh->is_func_descriptor = 1;
4934 fdh->oh = fh;
4935 fh->is_func = 1;
4936 fh->oh = fdh;
4937 return fdh;
4938 }
4939
4940 /* Fix function descriptor symbols defined in .opd sections to be
4941 function type. */
4942
4943 static bfd_boolean
4944 ppc64_elf_add_symbol_hook (bfd *ibfd,
4945 struct bfd_link_info *info,
4946 Elf_Internal_Sym *isym,
4947 const char **name,
4948 flagword *flags ATTRIBUTE_UNUSED,
4949 asection **sec,
4950 bfd_vma *value)
4951 {
4952 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4953 && (ibfd->flags & DYNAMIC) == 0
4954 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4955 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4956
4957 if (*sec != NULL
4958 && strcmp ((*sec)->name, ".opd") == 0)
4959 {
4960 asection *code_sec;
4961
4962 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4963 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4964 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4965
4966 /* If the symbol is a function defined in .opd, and the function
4967 code is in a discarded group, let it appear to be undefined. */
4968 if (!bfd_link_relocatable (info)
4969 && (*sec)->reloc_count != 0
4970 && opd_entry_value (*sec, *value, &code_sec, NULL,
4971 FALSE) != (bfd_vma) -1
4972 && discarded_section (code_sec))
4973 {
4974 *sec = bfd_und_section_ptr;
4975 isym->st_shndx = SHN_UNDEF;
4976 }
4977 }
4978 else if (*sec != NULL
4979 && strcmp ((*sec)->name, ".toc") == 0
4980 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4981 {
4982 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4983 if (htab != NULL)
4984 htab->params->object_in_toc = 1;
4985 }
4986
4987 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4988 {
4989 if (abiversion (ibfd) == 0)
4990 set_abiversion (ibfd, 2);
4991 else if (abiversion (ibfd) == 1)
4992 {
4993 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4994 " for ABI version 1\n"), name);
4995 bfd_set_error (bfd_error_bad_value);
4996 return FALSE;
4997 }
4998 }
4999
5000 return TRUE;
5001 }
5002
5003 /* Merge non-visibility st_other attributes: local entry point. */
5004
5005 static void
5006 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5007 const Elf_Internal_Sym *isym,
5008 bfd_boolean definition,
5009 bfd_boolean dynamic)
5010 {
5011 if (definition && (!dynamic || !h->def_regular))
5012 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5013 | ELF_ST_VISIBILITY (h->other));
5014 }
5015
5016 /* Hook called on merging a symbol. We use this to clear "fake" since
5017 we now have a real symbol. */
5018
5019 static bfd_boolean
5020 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5021 const Elf_Internal_Sym *isym ATTRIBUTE_UNUSED,
5022 asection **psec ATTRIBUTE_UNUSED,
5023 bfd_boolean newdef ATTRIBUTE_UNUSED,
5024 bfd_boolean olddef ATTRIBUTE_UNUSED,
5025 bfd *oldbfd ATTRIBUTE_UNUSED,
5026 const asection *oldsec ATTRIBUTE_UNUSED)
5027 {
5028 ((struct ppc_link_hash_entry *) h)->fake = 0;
5029 return TRUE;
5030 }
5031
5032 /* This function makes an old ABI object reference to ".bar" cause the
5033 inclusion of a new ABI object archive that defines "bar".
5034 NAME is a symbol defined in an archive. Return a symbol in the hash
5035 table that might be satisfied by the archive symbols. */
5036
5037 static struct elf_link_hash_entry *
5038 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5039 struct bfd_link_info *info,
5040 const char *name)
5041 {
5042 struct elf_link_hash_entry *h;
5043 char *dot_name;
5044 size_t len;
5045
5046 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5047 if (h != NULL
5048 /* Don't return this sym if it is a fake function descriptor
5049 created by add_symbol_adjust. */
5050 && !((struct ppc_link_hash_entry *) h)->fake)
5051 return h;
5052
5053 if (name[0] == '.')
5054 return h;
5055
5056 len = strlen (name);
5057 dot_name = bfd_alloc (abfd, len + 2);
5058 if (dot_name == NULL)
5059 return (struct elf_link_hash_entry *) 0 - 1;
5060 dot_name[0] = '.';
5061 memcpy (dot_name + 1, name, len + 1);
5062 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5063 bfd_release (abfd, dot_name);
5064 return h;
5065 }
5066
5067 /* This function satisfies all old ABI object references to ".bar" if a
5068 new ABI object defines "bar". Well, at least, undefined dot symbols
5069 are made weak. This stops later archive searches from including an
5070 object if we already have a function descriptor definition. It also
5071 prevents the linker complaining about undefined symbols.
5072 We also check and correct mismatched symbol visibility here. The
5073 most restrictive visibility of the function descriptor and the
5074 function entry symbol is used. */
5075
5076 static bfd_boolean
5077 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5078 {
5079 struct ppc_link_hash_table *htab;
5080 struct ppc_link_hash_entry *fdh;
5081
5082 if (eh->elf.root.type == bfd_link_hash_warning)
5083 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5084
5085 if (eh->elf.root.type == bfd_link_hash_indirect)
5086 return TRUE;
5087
5088 if (eh->elf.root.root.string[0] != '.')
5089 abort ();
5090
5091 htab = ppc_hash_table (info);
5092 if (htab == NULL)
5093 return FALSE;
5094
5095 fdh = lookup_fdh (eh, htab);
5096 if (fdh == NULL
5097 && !bfd_link_relocatable (info)
5098 && (eh->elf.root.type == bfd_link_hash_undefined
5099 || eh->elf.root.type == bfd_link_hash_undefweak)
5100 && eh->elf.ref_regular)
5101 {
5102 /* Make an undefined function descriptor sym, in order to
5103 pull in an --as-needed shared lib. Archives are handled
5104 elsewhere. */
5105 fdh = make_fdh (info, eh);
5106 if (fdh == NULL)
5107 return FALSE;
5108 }
5109
5110 if (fdh != NULL)
5111 {
5112 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5113 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5114
5115 /* Make both descriptor and entry symbol have the most
5116 constraining visibility of either symbol. */
5117 if (entry_vis < descr_vis)
5118 fdh->elf.other += entry_vis - descr_vis;
5119 else if (entry_vis > descr_vis)
5120 eh->elf.other += descr_vis - entry_vis;
5121
5122 /* Propagate reference flags from entry symbol to function
5123 descriptor symbol. */
5124 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5125 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5126 fdh->elf.ref_regular |= eh->elf.ref_regular;
5127 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5128
5129 if (!fdh->elf.forced_local
5130 && fdh->elf.dynindx == -1
5131 && fdh->elf.versioned != versioned_hidden
5132 && (bfd_link_dll (info)
5133 || fdh->elf.def_dynamic
5134 || fdh->elf.ref_dynamic)
5135 && (eh->elf.ref_regular
5136 || eh->elf.def_regular))
5137 {
5138 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5139 return FALSE;
5140 }
5141 }
5142
5143 return TRUE;
5144 }
5145
5146 /* Set up opd section info and abiversion for IBFD, and process list
5147 of dot-symbols we made in link_hash_newfunc. */
5148
5149 static bfd_boolean
5150 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5151 {
5152 struct ppc_link_hash_table *htab;
5153 struct ppc_link_hash_entry **p, *eh;
5154 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5155
5156 if (opd != NULL && opd->size != 0)
5157 {
5158 if (abiversion (ibfd) == 0)
5159 set_abiversion (ibfd, 1);
5160 else if (abiversion (ibfd) >= 2)
5161 {
5162 /* xgettext:c-format */
5163 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5164 " version %d\n"),
5165 ibfd, abiversion (ibfd));
5166 bfd_set_error (bfd_error_bad_value);
5167 return FALSE;
5168 }
5169
5170 if ((ibfd->flags & DYNAMIC) == 0
5171 && (opd->flags & SEC_RELOC) != 0
5172 && opd->reloc_count != 0
5173 && !bfd_is_abs_section (opd->output_section))
5174 {
5175 /* Garbage collection needs some extra help with .opd sections.
5176 We don't want to necessarily keep everything referenced by
5177 relocs in .opd, as that would keep all functions. Instead,
5178 if we reference an .opd symbol (a function descriptor), we
5179 want to keep the function code symbol's section. This is
5180 easy for global symbols, but for local syms we need to keep
5181 information about the associated function section. */
5182 bfd_size_type amt;
5183 asection **opd_sym_map;
5184
5185 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5186 opd_sym_map = bfd_zalloc (ibfd, amt);
5187 if (opd_sym_map == NULL)
5188 return FALSE;
5189 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5190 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5191 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5192 }
5193 }
5194
5195 if (!is_ppc64_elf (info->output_bfd))
5196 return TRUE;
5197 htab = ppc_hash_table (info);
5198 if (htab == NULL)
5199 return FALSE;
5200
5201 /* For input files without an explicit abiversion in e_flags
5202 we should have flagged any with symbol st_other bits set
5203 as ELFv1 and above flagged those with .opd as ELFv2.
5204 Set the output abiversion if not yet set, and for any input
5205 still ambiguous, take its abiversion from the output.
5206 Differences in ABI are reported later. */
5207 if (abiversion (info->output_bfd) == 0)
5208 set_abiversion (info->output_bfd, abiversion (ibfd));
5209 else if (abiversion (ibfd) == 0)
5210 set_abiversion (ibfd, abiversion (info->output_bfd));
5211
5212 p = &htab->dot_syms;
5213 while ((eh = *p) != NULL)
5214 {
5215 *p = NULL;
5216 if (&eh->elf == htab->elf.hgot)
5217 ;
5218 else if (htab->elf.hgot == NULL
5219 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5220 htab->elf.hgot = &eh->elf;
5221 else if (abiversion (ibfd) <= 1)
5222 {
5223 htab->need_func_desc_adj = 1;
5224 if (!add_symbol_adjust (eh, info))
5225 return FALSE;
5226 }
5227 p = &eh->u.next_dot_sym;
5228 }
5229 return TRUE;
5230 }
5231
5232 /* Undo hash table changes when an --as-needed input file is determined
5233 not to be needed. */
5234
5235 static bfd_boolean
5236 ppc64_elf_notice_as_needed (bfd *ibfd,
5237 struct bfd_link_info *info,
5238 enum notice_asneeded_action act)
5239 {
5240 if (act == notice_not_needed)
5241 {
5242 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5243
5244 if (htab == NULL)
5245 return FALSE;
5246
5247 htab->dot_syms = NULL;
5248 }
5249 return _bfd_elf_notice_as_needed (ibfd, info, act);
5250 }
5251
5252 /* If --just-symbols against a final linked binary, then assume we need
5253 toc adjusting stubs when calling functions defined there. */
5254
5255 static void
5256 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5257 {
5258 if ((sec->flags & SEC_CODE) != 0
5259 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5260 && is_ppc64_elf (sec->owner))
5261 {
5262 if (abiversion (sec->owner) >= 2
5263 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5264 sec->has_toc_reloc = 1;
5265 }
5266 _bfd_elf_link_just_syms (sec, info);
5267 }
5268
5269 static struct plt_entry **
5270 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5271 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5272 {
5273 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5274 struct plt_entry **local_plt;
5275 unsigned char *local_got_tls_masks;
5276
5277 if (local_got_ents == NULL)
5278 {
5279 bfd_size_type size = symtab_hdr->sh_info;
5280
5281 size *= (sizeof (*local_got_ents)
5282 + sizeof (*local_plt)
5283 + sizeof (*local_got_tls_masks));
5284 local_got_ents = bfd_zalloc (abfd, size);
5285 if (local_got_ents == NULL)
5286 return NULL;
5287 elf_local_got_ents (abfd) = local_got_ents;
5288 }
5289
5290 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5291 {
5292 struct got_entry *ent;
5293
5294 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5295 if (ent->addend == r_addend
5296 && ent->owner == abfd
5297 && ent->tls_type == tls_type)
5298 break;
5299 if (ent == NULL)
5300 {
5301 bfd_size_type amt = sizeof (*ent);
5302 ent = bfd_alloc (abfd, amt);
5303 if (ent == NULL)
5304 return FALSE;
5305 ent->next = local_got_ents[r_symndx];
5306 ent->addend = r_addend;
5307 ent->owner = abfd;
5308 ent->tls_type = tls_type;
5309 ent->is_indirect = FALSE;
5310 ent->got.refcount = 0;
5311 local_got_ents[r_symndx] = ent;
5312 }
5313 ent->got.refcount += 1;
5314 }
5315
5316 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5317 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5318 local_got_tls_masks[r_symndx] |= tls_type;
5319
5320 return local_plt + r_symndx;
5321 }
5322
5323 static bfd_boolean
5324 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5325 {
5326 struct plt_entry *ent;
5327
5328 for (ent = *plist; ent != NULL; ent = ent->next)
5329 if (ent->addend == addend)
5330 break;
5331 if (ent == NULL)
5332 {
5333 bfd_size_type amt = sizeof (*ent);
5334 ent = bfd_alloc (abfd, amt);
5335 if (ent == NULL)
5336 return FALSE;
5337 ent->next = *plist;
5338 ent->addend = addend;
5339 ent->plt.refcount = 0;
5340 *plist = ent;
5341 }
5342 ent->plt.refcount += 1;
5343 return TRUE;
5344 }
5345
5346 static bfd_boolean
5347 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5348 {
5349 return (r_type == R_PPC64_REL24
5350 || r_type == R_PPC64_REL14
5351 || r_type == R_PPC64_REL14_BRTAKEN
5352 || r_type == R_PPC64_REL14_BRNTAKEN
5353 || r_type == R_PPC64_ADDR24
5354 || r_type == R_PPC64_ADDR14
5355 || r_type == R_PPC64_ADDR14_BRTAKEN
5356 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5357 }
5358
5359 /* Look through the relocs for a section during the first phase, and
5360 calculate needed space in the global offset table, procedure
5361 linkage table, and dynamic reloc sections. */
5362
5363 static bfd_boolean
5364 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5365 asection *sec, const Elf_Internal_Rela *relocs)
5366 {
5367 struct ppc_link_hash_table *htab;
5368 Elf_Internal_Shdr *symtab_hdr;
5369 struct elf_link_hash_entry **sym_hashes;
5370 const Elf_Internal_Rela *rel;
5371 const Elf_Internal_Rela *rel_end;
5372 asection *sreloc;
5373 asection **opd_sym_map;
5374 struct elf_link_hash_entry *tga, *dottga;
5375
5376 if (bfd_link_relocatable (info))
5377 return TRUE;
5378
5379 /* Don't do anything special with non-loaded, non-alloced sections.
5380 In particular, any relocs in such sections should not affect GOT
5381 and PLT reference counting (ie. we don't allow them to create GOT
5382 or PLT entries), there's no possibility or desire to optimize TLS
5383 relocs, and there's not much point in propagating relocs to shared
5384 libs that the dynamic linker won't relocate. */
5385 if ((sec->flags & SEC_ALLOC) == 0)
5386 return TRUE;
5387
5388 BFD_ASSERT (is_ppc64_elf (abfd));
5389
5390 htab = ppc_hash_table (info);
5391 if (htab == NULL)
5392 return FALSE;
5393
5394 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5395 FALSE, FALSE, TRUE);
5396 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5397 FALSE, FALSE, TRUE);
5398 symtab_hdr = &elf_symtab_hdr (abfd);
5399 sym_hashes = elf_sym_hashes (abfd);
5400 sreloc = NULL;
5401 opd_sym_map = NULL;
5402 if (ppc64_elf_section_data (sec) != NULL
5403 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5404 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5405
5406 rel_end = relocs + sec->reloc_count;
5407 for (rel = relocs; rel < rel_end; rel++)
5408 {
5409 unsigned long r_symndx;
5410 struct elf_link_hash_entry *h;
5411 enum elf_ppc64_reloc_type r_type;
5412 int tls_type;
5413 struct _ppc64_elf_section_data *ppc64_sec;
5414 struct plt_entry **ifunc, **plt_list;
5415
5416 r_symndx = ELF64_R_SYM (rel->r_info);
5417 if (r_symndx < symtab_hdr->sh_info)
5418 h = NULL;
5419 else
5420 {
5421 struct ppc_link_hash_entry *eh;
5422
5423 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5424 h = elf_follow_link (h);
5425 eh = (struct ppc_link_hash_entry *) h;
5426
5427 /* PR15323, ref flags aren't set for references in the same
5428 object. */
5429 h->root.non_ir_ref_regular = 1;
5430 if (eh->is_func && eh->oh != NULL)
5431 eh->oh->elf.root.non_ir_ref_regular = 1;
5432
5433 if (h == htab->elf.hgot)
5434 sec->has_toc_reloc = 1;
5435 }
5436
5437 tls_type = 0;
5438 ifunc = NULL;
5439 if (h != NULL)
5440 {
5441 if (h->type == STT_GNU_IFUNC)
5442 {
5443 h->needs_plt = 1;
5444 ifunc = &h->plt.plist;
5445 }
5446 }
5447 else
5448 {
5449 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5450 abfd, r_symndx);
5451 if (isym == NULL)
5452 return FALSE;
5453
5454 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5455 {
5456 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5457 rel->r_addend, PLT_IFUNC);
5458 if (ifunc == NULL)
5459 return FALSE;
5460 }
5461 }
5462
5463 r_type = ELF64_R_TYPE (rel->r_info);
5464 switch (r_type)
5465 {
5466 case R_PPC64_TLSGD:
5467 case R_PPC64_TLSLD:
5468 /* These special tls relocs tie a call to __tls_get_addr with
5469 its parameter symbol. */
5470 break;
5471
5472 case R_PPC64_GOT_TLSLD16:
5473 case R_PPC64_GOT_TLSLD16_LO:
5474 case R_PPC64_GOT_TLSLD16_HI:
5475 case R_PPC64_GOT_TLSLD16_HA:
5476 tls_type = TLS_TLS | TLS_LD;
5477 goto dogottls;
5478
5479 case R_PPC64_GOT_TLSGD16:
5480 case R_PPC64_GOT_TLSGD16_LO:
5481 case R_PPC64_GOT_TLSGD16_HI:
5482 case R_PPC64_GOT_TLSGD16_HA:
5483 tls_type = TLS_TLS | TLS_GD;
5484 goto dogottls;
5485
5486 case R_PPC64_GOT_TPREL16_DS:
5487 case R_PPC64_GOT_TPREL16_LO_DS:
5488 case R_PPC64_GOT_TPREL16_HI:
5489 case R_PPC64_GOT_TPREL16_HA:
5490 if (bfd_link_pic (info))
5491 info->flags |= DF_STATIC_TLS;
5492 tls_type = TLS_TLS | TLS_TPREL;
5493 goto dogottls;
5494
5495 case R_PPC64_GOT_DTPREL16_DS:
5496 case R_PPC64_GOT_DTPREL16_LO_DS:
5497 case R_PPC64_GOT_DTPREL16_HI:
5498 case R_PPC64_GOT_DTPREL16_HA:
5499 tls_type = TLS_TLS | TLS_DTPREL;
5500 dogottls:
5501 sec->has_tls_reloc = 1;
5502 /* Fall through */
5503
5504 case R_PPC64_GOT16:
5505 case R_PPC64_GOT16_DS:
5506 case R_PPC64_GOT16_HA:
5507 case R_PPC64_GOT16_HI:
5508 case R_PPC64_GOT16_LO:
5509 case R_PPC64_GOT16_LO_DS:
5510 /* This symbol requires a global offset table entry. */
5511 sec->has_toc_reloc = 1;
5512 if (r_type == R_PPC64_GOT_TLSLD16
5513 || r_type == R_PPC64_GOT_TLSGD16
5514 || r_type == R_PPC64_GOT_TPREL16_DS
5515 || r_type == R_PPC64_GOT_DTPREL16_DS
5516 || r_type == R_PPC64_GOT16
5517 || r_type == R_PPC64_GOT16_DS)
5518 {
5519 htab->do_multi_toc = 1;
5520 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5521 }
5522
5523 if (ppc64_elf_tdata (abfd)->got == NULL
5524 && !create_got_section (abfd, info))
5525 return FALSE;
5526
5527 if (h != NULL)
5528 {
5529 struct ppc_link_hash_entry *eh;
5530 struct got_entry *ent;
5531
5532 eh = (struct ppc_link_hash_entry *) h;
5533 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5534 if (ent->addend == rel->r_addend
5535 && ent->owner == abfd
5536 && ent->tls_type == tls_type)
5537 break;
5538 if (ent == NULL)
5539 {
5540 bfd_size_type amt = sizeof (*ent);
5541 ent = bfd_alloc (abfd, amt);
5542 if (ent == NULL)
5543 return FALSE;
5544 ent->next = eh->elf.got.glist;
5545 ent->addend = rel->r_addend;
5546 ent->owner = abfd;
5547 ent->tls_type = tls_type;
5548 ent->is_indirect = FALSE;
5549 ent->got.refcount = 0;
5550 eh->elf.got.glist = ent;
5551 }
5552 ent->got.refcount += 1;
5553 eh->tls_mask |= tls_type;
5554 }
5555 else
5556 /* This is a global offset table entry for a local symbol. */
5557 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5558 rel->r_addend, tls_type))
5559 return FALSE;
5560
5561 /* We may also need a plt entry if the symbol turns out to be
5562 an ifunc. */
5563 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5564 {
5565 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5566 return FALSE;
5567 }
5568 break;
5569
5570 case R_PPC64_PLT16_HA:
5571 case R_PPC64_PLT16_HI:
5572 case R_PPC64_PLT16_LO:
5573 case R_PPC64_PLT32:
5574 case R_PPC64_PLT64:
5575 /* This symbol requires a procedure linkage table entry. */
5576 plt_list = ifunc;
5577 if (h != NULL)
5578 {
5579 h->needs_plt = 1;
5580 if (h->root.root.string[0] == '.'
5581 && h->root.root.string[1] != '\0')
5582 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5583 plt_list = &h->plt.plist;
5584 }
5585 if (plt_list == NULL)
5586 {
5587 /* It does not make sense to have a procedure linkage
5588 table entry for a non-ifunc local symbol. */
5589 info->callbacks->einfo
5590 /* xgettext:c-format */
5591 (_("%H: %s reloc against local symbol\n"),
5592 abfd, sec, rel->r_offset,
5593 ppc64_elf_howto_table[r_type]->name);
5594 bfd_set_error (bfd_error_bad_value);
5595 return FALSE;
5596 }
5597 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5598 return FALSE;
5599 break;
5600
5601 /* The following relocations don't need to propagate the
5602 relocation if linking a shared object since they are
5603 section relative. */
5604 case R_PPC64_SECTOFF:
5605 case R_PPC64_SECTOFF_LO:
5606 case R_PPC64_SECTOFF_HI:
5607 case R_PPC64_SECTOFF_HA:
5608 case R_PPC64_SECTOFF_DS:
5609 case R_PPC64_SECTOFF_LO_DS:
5610 case R_PPC64_DTPREL16:
5611 case R_PPC64_DTPREL16_LO:
5612 case R_PPC64_DTPREL16_HI:
5613 case R_PPC64_DTPREL16_HA:
5614 case R_PPC64_DTPREL16_DS:
5615 case R_PPC64_DTPREL16_LO_DS:
5616 case R_PPC64_DTPREL16_HIGH:
5617 case R_PPC64_DTPREL16_HIGHA:
5618 case R_PPC64_DTPREL16_HIGHER:
5619 case R_PPC64_DTPREL16_HIGHERA:
5620 case R_PPC64_DTPREL16_HIGHEST:
5621 case R_PPC64_DTPREL16_HIGHESTA:
5622 break;
5623
5624 /* Nor do these. */
5625 case R_PPC64_REL16:
5626 case R_PPC64_REL16_LO:
5627 case R_PPC64_REL16_HI:
5628 case R_PPC64_REL16_HA:
5629 case R_PPC64_REL16DX_HA:
5630 break;
5631
5632 /* Not supported as a dynamic relocation. */
5633 case R_PPC64_ADDR64_LOCAL:
5634 if (bfd_link_pic (info))
5635 {
5636 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5637 ppc_howto_init ();
5638 /* xgettext:c-format */
5639 info->callbacks->einfo (_("%H: %s reloc unsupported "
5640 "in shared libraries and PIEs.\n"),
5641 abfd, sec, rel->r_offset,
5642 ppc64_elf_howto_table[r_type]->name);
5643 bfd_set_error (bfd_error_bad_value);
5644 return FALSE;
5645 }
5646 break;
5647
5648 case R_PPC64_TOC16:
5649 case R_PPC64_TOC16_DS:
5650 htab->do_multi_toc = 1;
5651 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5652 /* Fall through. */
5653 case R_PPC64_TOC16_LO:
5654 case R_PPC64_TOC16_HI:
5655 case R_PPC64_TOC16_HA:
5656 case R_PPC64_TOC16_LO_DS:
5657 sec->has_toc_reloc = 1;
5658 break;
5659
5660 /* Marker reloc. */
5661 case R_PPC64_ENTRY:
5662 break;
5663
5664 /* This relocation describes the C++ object vtable hierarchy.
5665 Reconstruct it for later use during GC. */
5666 case R_PPC64_GNU_VTINHERIT:
5667 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5668 return FALSE;
5669 break;
5670
5671 /* This relocation describes which C++ vtable entries are actually
5672 used. Record for later use during GC. */
5673 case R_PPC64_GNU_VTENTRY:
5674 BFD_ASSERT (h != NULL);
5675 if (h != NULL
5676 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5677 return FALSE;
5678 break;
5679
5680 case R_PPC64_REL14:
5681 case R_PPC64_REL14_BRTAKEN:
5682 case R_PPC64_REL14_BRNTAKEN:
5683 {
5684 asection *dest = NULL;
5685
5686 /* Heuristic: If jumping outside our section, chances are
5687 we are going to need a stub. */
5688 if (h != NULL)
5689 {
5690 /* If the sym is weak it may be overridden later, so
5691 don't assume we know where a weak sym lives. */
5692 if (h->root.type == bfd_link_hash_defined)
5693 dest = h->root.u.def.section;
5694 }
5695 else
5696 {
5697 Elf_Internal_Sym *isym;
5698
5699 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5700 abfd, r_symndx);
5701 if (isym == NULL)
5702 return FALSE;
5703
5704 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5705 }
5706
5707 if (dest != sec)
5708 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5709 }
5710 /* Fall through. */
5711
5712 case R_PPC64_REL24:
5713 plt_list = ifunc;
5714 if (h != NULL)
5715 {
5716 h->needs_plt = 1;
5717 if (h->root.root.string[0] == '.'
5718 && h->root.root.string[1] != '\0')
5719 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5720
5721 if (h == tga || h == dottga)
5722 {
5723 sec->has_tls_reloc = 1;
5724 if (rel != relocs
5725 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5726 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5727 /* We have a new-style __tls_get_addr call with
5728 a marker reloc. */
5729 ;
5730 else
5731 /* Mark this section as having an old-style call. */
5732 sec->has_tls_get_addr_call = 1;
5733 }
5734 plt_list = &h->plt.plist;
5735 }
5736
5737 /* We may need a .plt entry if the function this reloc
5738 refers to is in a shared lib. */
5739 if (plt_list
5740 && !update_plt_info (abfd, plt_list, rel->r_addend))
5741 return FALSE;
5742 break;
5743
5744 case R_PPC64_ADDR14:
5745 case R_PPC64_ADDR14_BRNTAKEN:
5746 case R_PPC64_ADDR14_BRTAKEN:
5747 case R_PPC64_ADDR24:
5748 goto dodyn;
5749
5750 case R_PPC64_TPREL64:
5751 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5752 if (bfd_link_pic (info))
5753 info->flags |= DF_STATIC_TLS;
5754 goto dotlstoc;
5755
5756 case R_PPC64_DTPMOD64:
5757 if (rel + 1 < rel_end
5758 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5759 && rel[1].r_offset == rel->r_offset + 8)
5760 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5761 else
5762 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5763 goto dotlstoc;
5764
5765 case R_PPC64_DTPREL64:
5766 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5767 if (rel != relocs
5768 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5769 && rel[-1].r_offset == rel->r_offset - 8)
5770 /* This is the second reloc of a dtpmod, dtprel pair.
5771 Don't mark with TLS_DTPREL. */
5772 goto dodyn;
5773
5774 dotlstoc:
5775 sec->has_tls_reloc = 1;
5776 if (h != NULL)
5777 {
5778 struct ppc_link_hash_entry *eh;
5779 eh = (struct ppc_link_hash_entry *) h;
5780 eh->tls_mask |= tls_type;
5781 }
5782 else
5783 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5784 rel->r_addend, tls_type))
5785 return FALSE;
5786
5787 ppc64_sec = ppc64_elf_section_data (sec);
5788 if (ppc64_sec->sec_type != sec_toc)
5789 {
5790 bfd_size_type amt;
5791
5792 /* One extra to simplify get_tls_mask. */
5793 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5794 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5795 if (ppc64_sec->u.toc.symndx == NULL)
5796 return FALSE;
5797 amt = sec->size * sizeof (bfd_vma) / 8;
5798 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5799 if (ppc64_sec->u.toc.add == NULL)
5800 return FALSE;
5801 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5802 ppc64_sec->sec_type = sec_toc;
5803 }
5804 BFD_ASSERT (rel->r_offset % 8 == 0);
5805 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5806 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5807
5808 /* Mark the second slot of a GD or LD entry.
5809 -1 to indicate GD and -2 to indicate LD. */
5810 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5811 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5812 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5813 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5814 goto dodyn;
5815
5816 case R_PPC64_TPREL16:
5817 case R_PPC64_TPREL16_LO:
5818 case R_PPC64_TPREL16_HI:
5819 case R_PPC64_TPREL16_HA:
5820 case R_PPC64_TPREL16_DS:
5821 case R_PPC64_TPREL16_LO_DS:
5822 case R_PPC64_TPREL16_HIGH:
5823 case R_PPC64_TPREL16_HIGHA:
5824 case R_PPC64_TPREL16_HIGHER:
5825 case R_PPC64_TPREL16_HIGHERA:
5826 case R_PPC64_TPREL16_HIGHEST:
5827 case R_PPC64_TPREL16_HIGHESTA:
5828 if (bfd_link_pic (info))
5829 {
5830 info->flags |= DF_STATIC_TLS;
5831 goto dodyn;
5832 }
5833 break;
5834
5835 case R_PPC64_ADDR64:
5836 if (opd_sym_map != NULL
5837 && rel + 1 < rel_end
5838 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5839 {
5840 if (h != NULL)
5841 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5842 else
5843 {
5844 asection *s;
5845 Elf_Internal_Sym *isym;
5846
5847 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5848 abfd, r_symndx);
5849 if (isym == NULL)
5850 return FALSE;
5851
5852 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5853 if (s != NULL && s != sec)
5854 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5855 }
5856 }
5857 /* Fall through. */
5858
5859 case R_PPC64_ADDR16:
5860 case R_PPC64_ADDR16_DS:
5861 case R_PPC64_ADDR16_HA:
5862 case R_PPC64_ADDR16_HI:
5863 case R_PPC64_ADDR16_HIGH:
5864 case R_PPC64_ADDR16_HIGHA:
5865 case R_PPC64_ADDR16_HIGHER:
5866 case R_PPC64_ADDR16_HIGHERA:
5867 case R_PPC64_ADDR16_HIGHEST:
5868 case R_PPC64_ADDR16_HIGHESTA:
5869 case R_PPC64_ADDR16_LO:
5870 case R_PPC64_ADDR16_LO_DS:
5871 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5872 && rel->r_addend == 0)
5873 {
5874 /* We may need a .plt entry if this reloc refers to a
5875 function in a shared lib. */
5876 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5877 return FALSE;
5878 h->pointer_equality_needed = 1;
5879 }
5880 /* Fall through. */
5881
5882 case R_PPC64_REL30:
5883 case R_PPC64_REL32:
5884 case R_PPC64_REL64:
5885 case R_PPC64_ADDR32:
5886 case R_PPC64_UADDR16:
5887 case R_PPC64_UADDR32:
5888 case R_PPC64_UADDR64:
5889 case R_PPC64_TOC:
5890 if (h != NULL && !bfd_link_pic (info))
5891 /* We may need a copy reloc. */
5892 h->non_got_ref = 1;
5893
5894 /* Don't propagate .opd relocs. */
5895 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5896 break;
5897
5898 /* If we are creating a shared library, and this is a reloc
5899 against a global symbol, or a non PC relative reloc
5900 against a local symbol, then we need to copy the reloc
5901 into the shared library. However, if we are linking with
5902 -Bsymbolic, we do not need to copy a reloc against a
5903 global symbol which is defined in an object we are
5904 including in the link (i.e., DEF_REGULAR is set). At
5905 this point we have not seen all the input files, so it is
5906 possible that DEF_REGULAR is not set now but will be set
5907 later (it is never cleared). In case of a weak definition,
5908 DEF_REGULAR may be cleared later by a strong definition in
5909 a shared library. We account for that possibility below by
5910 storing information in the dyn_relocs field of the hash
5911 table entry. A similar situation occurs when creating
5912 shared libraries and symbol visibility changes render the
5913 symbol local.
5914
5915 If on the other hand, we are creating an executable, we
5916 may need to keep relocations for symbols satisfied by a
5917 dynamic library if we manage to avoid copy relocs for the
5918 symbol. */
5919 dodyn:
5920 if ((bfd_link_pic (info)
5921 && (must_be_dyn_reloc (info, r_type)
5922 || (h != NULL
5923 && (!SYMBOLIC_BIND (info, h)
5924 || h->root.type == bfd_link_hash_defweak
5925 || !h->def_regular))))
5926 || (ELIMINATE_COPY_RELOCS
5927 && !bfd_link_pic (info)
5928 && h != NULL
5929 && (h->root.type == bfd_link_hash_defweak
5930 || !h->def_regular))
5931 || (!bfd_link_pic (info)
5932 && ifunc != NULL))
5933 {
5934 /* We must copy these reloc types into the output file.
5935 Create a reloc section in dynobj and make room for
5936 this reloc. */
5937 if (sreloc == NULL)
5938 {
5939 sreloc = _bfd_elf_make_dynamic_reloc_section
5940 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5941
5942 if (sreloc == NULL)
5943 return FALSE;
5944 }
5945
5946 /* If this is a global symbol, we count the number of
5947 relocations we need for this symbol. */
5948 if (h != NULL)
5949 {
5950 struct elf_dyn_relocs *p;
5951 struct elf_dyn_relocs **head;
5952
5953 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5954 p = *head;
5955 if (p == NULL || p->sec != sec)
5956 {
5957 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5958 if (p == NULL)
5959 return FALSE;
5960 p->next = *head;
5961 *head = p;
5962 p->sec = sec;
5963 p->count = 0;
5964 p->pc_count = 0;
5965 }
5966 p->count += 1;
5967 if (!must_be_dyn_reloc (info, r_type))
5968 p->pc_count += 1;
5969 }
5970 else
5971 {
5972 /* Track dynamic relocs needed for local syms too.
5973 We really need local syms available to do this
5974 easily. Oh well. */
5975 struct ppc_dyn_relocs *p;
5976 struct ppc_dyn_relocs **head;
5977 bfd_boolean is_ifunc;
5978 asection *s;
5979 void *vpp;
5980 Elf_Internal_Sym *isym;
5981
5982 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5983 abfd, r_symndx);
5984 if (isym == NULL)
5985 return FALSE;
5986
5987 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5988 if (s == NULL)
5989 s = sec;
5990
5991 vpp = &elf_section_data (s)->local_dynrel;
5992 head = (struct ppc_dyn_relocs **) vpp;
5993 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5994 p = *head;
5995 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5996 p = p->next;
5997 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5998 {
5999 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6000 if (p == NULL)
6001 return FALSE;
6002 p->next = *head;
6003 *head = p;
6004 p->sec = sec;
6005 p->ifunc = is_ifunc;
6006 p->count = 0;
6007 }
6008 p->count += 1;
6009 }
6010 }
6011 break;
6012
6013 default:
6014 break;
6015 }
6016 }
6017
6018 return TRUE;
6019 }
6020
6021 /* Merge backend specific data from an object file to the output
6022 object file when linking. */
6023
6024 static bfd_boolean
6025 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6026 {
6027 bfd *obfd = info->output_bfd;
6028 unsigned long iflags, oflags;
6029
6030 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6031 return TRUE;
6032
6033 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6034 return TRUE;
6035
6036 if (!_bfd_generic_verify_endian_match (ibfd, info))
6037 return FALSE;
6038
6039 iflags = elf_elfheader (ibfd)->e_flags;
6040 oflags = elf_elfheader (obfd)->e_flags;
6041
6042 if (iflags & ~EF_PPC64_ABI)
6043 {
6044 _bfd_error_handler
6045 /* xgettext:c-format */
6046 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6047 bfd_set_error (bfd_error_bad_value);
6048 return FALSE;
6049 }
6050 else if (iflags != oflags && iflags != 0)
6051 {
6052 _bfd_error_handler
6053 /* xgettext:c-format */
6054 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6055 ibfd, iflags, oflags);
6056 bfd_set_error (bfd_error_bad_value);
6057 return FALSE;
6058 }
6059
6060 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6061
6062 /* Merge Tag_compatibility attributes and any common GNU ones. */
6063 _bfd_elf_merge_object_attributes (ibfd, info);
6064
6065 return TRUE;
6066 }
6067
6068 static bfd_boolean
6069 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6070 {
6071 /* Print normal ELF private data. */
6072 _bfd_elf_print_private_bfd_data (abfd, ptr);
6073
6074 if (elf_elfheader (abfd)->e_flags != 0)
6075 {
6076 FILE *file = ptr;
6077
6078 fprintf (file, _("private flags = 0x%lx:"),
6079 elf_elfheader (abfd)->e_flags);
6080
6081 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6082 fprintf (file, _(" [abiv%ld]"),
6083 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6084 fputc ('\n', file);
6085 }
6086
6087 return TRUE;
6088 }
6089
6090 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6091 of the code entry point, and its section, which must be in the same
6092 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6093
6094 static bfd_vma
6095 opd_entry_value (asection *opd_sec,
6096 bfd_vma offset,
6097 asection **code_sec,
6098 bfd_vma *code_off,
6099 bfd_boolean in_code_sec)
6100 {
6101 bfd *opd_bfd = opd_sec->owner;
6102 Elf_Internal_Rela *relocs;
6103 Elf_Internal_Rela *lo, *hi, *look;
6104 bfd_vma val;
6105
6106 /* No relocs implies we are linking a --just-symbols object, or looking
6107 at a final linked executable with addr2line or somesuch. */
6108 if (opd_sec->reloc_count == 0)
6109 {
6110 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6111
6112 if (contents == NULL)
6113 {
6114 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6115 return (bfd_vma) -1;
6116 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6117 }
6118
6119 /* PR 17512: file: 64b9dfbb. */
6120 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6121 return (bfd_vma) -1;
6122
6123 val = bfd_get_64 (opd_bfd, contents + offset);
6124 if (code_sec != NULL)
6125 {
6126 asection *sec, *likely = NULL;
6127
6128 if (in_code_sec)
6129 {
6130 sec = *code_sec;
6131 if (sec->vma <= val
6132 && val < sec->vma + sec->size)
6133 likely = sec;
6134 else
6135 val = -1;
6136 }
6137 else
6138 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6139 if (sec->vma <= val
6140 && (sec->flags & SEC_LOAD) != 0
6141 && (sec->flags & SEC_ALLOC) != 0)
6142 likely = sec;
6143 if (likely != NULL)
6144 {
6145 *code_sec = likely;
6146 if (code_off != NULL)
6147 *code_off = val - likely->vma;
6148 }
6149 }
6150 return val;
6151 }
6152
6153 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6154
6155 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6156 if (relocs == NULL)
6157 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6158 /* PR 17512: file: df8e1fd6. */
6159 if (relocs == NULL)
6160 return (bfd_vma) -1;
6161
6162 /* Go find the opd reloc at the sym address. */
6163 lo = relocs;
6164 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6165 val = (bfd_vma) -1;
6166 while (lo < hi)
6167 {
6168 look = lo + (hi - lo) / 2;
6169 if (look->r_offset < offset)
6170 lo = look + 1;
6171 else if (look->r_offset > offset)
6172 hi = look;
6173 else
6174 {
6175 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6176
6177 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6178 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6179 {
6180 unsigned long symndx = ELF64_R_SYM (look->r_info);
6181 asection *sec = NULL;
6182
6183 if (symndx >= symtab_hdr->sh_info
6184 && elf_sym_hashes (opd_bfd) != NULL)
6185 {
6186 struct elf_link_hash_entry **sym_hashes;
6187 struct elf_link_hash_entry *rh;
6188
6189 sym_hashes = elf_sym_hashes (opd_bfd);
6190 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6191 if (rh != NULL)
6192 {
6193 rh = elf_follow_link (rh);
6194 if (rh->root.type != bfd_link_hash_defined
6195 && rh->root.type != bfd_link_hash_defweak)
6196 break;
6197 if (rh->root.u.def.section->owner == opd_bfd)
6198 {
6199 val = rh->root.u.def.value;
6200 sec = rh->root.u.def.section;
6201 }
6202 }
6203 }
6204
6205 if (sec == NULL)
6206 {
6207 Elf_Internal_Sym *sym;
6208
6209 if (symndx < symtab_hdr->sh_info)
6210 {
6211 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6212 if (sym == NULL)
6213 {
6214 size_t symcnt = symtab_hdr->sh_info;
6215 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6216 symcnt, 0,
6217 NULL, NULL, NULL);
6218 if (sym == NULL)
6219 break;
6220 symtab_hdr->contents = (bfd_byte *) sym;
6221 }
6222 sym += symndx;
6223 }
6224 else
6225 {
6226 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6227 1, symndx,
6228 NULL, NULL, NULL);
6229 if (sym == NULL)
6230 break;
6231 }
6232 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6233 if (sec == NULL)
6234 break;
6235 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6236 val = sym->st_value;
6237 }
6238
6239 val += look->r_addend;
6240 if (code_off != NULL)
6241 *code_off = val;
6242 if (code_sec != NULL)
6243 {
6244 if (in_code_sec && *code_sec != sec)
6245 return -1;
6246 else
6247 *code_sec = sec;
6248 }
6249 if (sec->output_section != NULL)
6250 val += sec->output_section->vma + sec->output_offset;
6251 }
6252 break;
6253 }
6254 }
6255
6256 return val;
6257 }
6258
6259 /* If the ELF symbol SYM might be a function in SEC, return the
6260 function size and set *CODE_OFF to the function's entry point,
6261 otherwise return zero. */
6262
6263 static bfd_size_type
6264 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6265 bfd_vma *code_off)
6266 {
6267 bfd_size_type size;
6268
6269 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6270 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6271 return 0;
6272
6273 size = 0;
6274 if (!(sym->flags & BSF_SYNTHETIC))
6275 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6276
6277 if (strcmp (sym->section->name, ".opd") == 0)
6278 {
6279 struct _opd_sec_data *opd = get_opd_info (sym->section);
6280 bfd_vma symval = sym->value;
6281
6282 if (opd != NULL
6283 && opd->adjust != NULL
6284 && elf_section_data (sym->section)->relocs != NULL)
6285 {
6286 /* opd_entry_value will use cached relocs that have been
6287 adjusted, but with raw symbols. That means both local
6288 and global symbols need adjusting. */
6289 long adjust = opd->adjust[OPD_NDX (symval)];
6290 if (adjust == -1)
6291 return 0;
6292 symval += adjust;
6293 }
6294
6295 if (opd_entry_value (sym->section, symval,
6296 &sec, code_off, TRUE) == (bfd_vma) -1)
6297 return 0;
6298 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6299 symbol. This size has nothing to do with the code size of the
6300 function, which is what we're supposed to return, but the
6301 code size isn't available without looking up the dot-sym.
6302 However, doing that would be a waste of time particularly
6303 since elf_find_function will look at the dot-sym anyway.
6304 Now, elf_find_function will keep the largest size of any
6305 function sym found at the code address of interest, so return
6306 1 here to avoid it incorrectly caching a larger function size
6307 for a small function. This does mean we return the wrong
6308 size for a new-ABI function of size 24, but all that does is
6309 disable caching for such functions. */
6310 if (size == 24)
6311 size = 1;
6312 }
6313 else
6314 {
6315 if (sym->section != sec)
6316 return 0;
6317 *code_off = sym->value;
6318 }
6319 if (size == 0)
6320 size = 1;
6321 return size;
6322 }
6323
6324 /* Return true if symbol is a strong function defined in an ELFv2
6325 object with st_other localentry bits of zero, ie. its local entry
6326 point coincides with its global entry point. */
6327
6328 static bfd_boolean
6329 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6330 {
6331 return (h != NULL
6332 && h->type == STT_FUNC
6333 && h->root.type == bfd_link_hash_defined
6334 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6335 && is_ppc64_elf (h->root.u.def.section->owner)
6336 && abiversion (h->root.u.def.section->owner) >= 2);
6337 }
6338
6339 /* Return true if symbol is defined in a regular object file. */
6340
6341 static bfd_boolean
6342 is_static_defined (struct elf_link_hash_entry *h)
6343 {
6344 return ((h->root.type == bfd_link_hash_defined
6345 || h->root.type == bfd_link_hash_defweak)
6346 && h->root.u.def.section != NULL
6347 && h->root.u.def.section->output_section != NULL);
6348 }
6349
6350 /* If FDH is a function descriptor symbol, return the associated code
6351 entry symbol if it is defined. Return NULL otherwise. */
6352
6353 static struct ppc_link_hash_entry *
6354 defined_code_entry (struct ppc_link_hash_entry *fdh)
6355 {
6356 if (fdh->is_func_descriptor)
6357 {
6358 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6359 if (fh->elf.root.type == bfd_link_hash_defined
6360 || fh->elf.root.type == bfd_link_hash_defweak)
6361 return fh;
6362 }
6363 return NULL;
6364 }
6365
6366 /* If FH is a function code entry symbol, return the associated
6367 function descriptor symbol if it is defined. Return NULL otherwise. */
6368
6369 static struct ppc_link_hash_entry *
6370 defined_func_desc (struct ppc_link_hash_entry *fh)
6371 {
6372 if (fh->oh != NULL
6373 && fh->oh->is_func_descriptor)
6374 {
6375 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6376 if (fdh->elf.root.type == bfd_link_hash_defined
6377 || fdh->elf.root.type == bfd_link_hash_defweak)
6378 return fdh;
6379 }
6380 return NULL;
6381 }
6382
6383 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6384
6385 /* Garbage collect sections, after first dealing with dot-symbols. */
6386
6387 static bfd_boolean
6388 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6389 {
6390 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6391
6392 if (htab != NULL && htab->need_func_desc_adj)
6393 {
6394 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6395 htab->need_func_desc_adj = 0;
6396 }
6397 return bfd_elf_gc_sections (abfd, info);
6398 }
6399
6400 /* Mark all our entry sym sections, both opd and code section. */
6401
6402 static void
6403 ppc64_elf_gc_keep (struct bfd_link_info *info)
6404 {
6405 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6406 struct bfd_sym_chain *sym;
6407
6408 if (htab == NULL)
6409 return;
6410
6411 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6412 {
6413 struct ppc_link_hash_entry *eh, *fh;
6414 asection *sec;
6415
6416 eh = (struct ppc_link_hash_entry *)
6417 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6418 if (eh == NULL)
6419 continue;
6420 if (eh->elf.root.type != bfd_link_hash_defined
6421 && eh->elf.root.type != bfd_link_hash_defweak)
6422 continue;
6423
6424 fh = defined_code_entry (eh);
6425 if (fh != NULL)
6426 {
6427 sec = fh->elf.root.u.def.section;
6428 sec->flags |= SEC_KEEP;
6429 }
6430 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6431 && opd_entry_value (eh->elf.root.u.def.section,
6432 eh->elf.root.u.def.value,
6433 &sec, NULL, FALSE) != (bfd_vma) -1)
6434 sec->flags |= SEC_KEEP;
6435
6436 sec = eh->elf.root.u.def.section;
6437 sec->flags |= SEC_KEEP;
6438 }
6439 }
6440
6441 /* Mark sections containing dynamically referenced symbols. When
6442 building shared libraries, we must assume that any visible symbol is
6443 referenced. */
6444
6445 static bfd_boolean
6446 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6447 {
6448 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6449 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6450 struct ppc_link_hash_entry *fdh;
6451 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6452
6453 /* Dynamic linking info is on the func descriptor sym. */
6454 fdh = defined_func_desc (eh);
6455 if (fdh != NULL)
6456 eh = fdh;
6457
6458 if ((eh->elf.root.type == bfd_link_hash_defined
6459 || eh->elf.root.type == bfd_link_hash_defweak)
6460 && (eh->elf.ref_dynamic
6461 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6462 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6463 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6464 && (!bfd_link_executable (info)
6465 || info->gc_keep_exported
6466 || info->export_dynamic
6467 || (eh->elf.dynamic
6468 && d != NULL
6469 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6470 && (eh->elf.versioned >= versioned
6471 || !bfd_hide_sym_by_version (info->version_info,
6472 eh->elf.root.root.string)))))
6473 {
6474 asection *code_sec;
6475 struct ppc_link_hash_entry *fh;
6476
6477 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6478
6479 /* Function descriptor syms cause the associated
6480 function code sym section to be marked. */
6481 fh = defined_code_entry (eh);
6482 if (fh != NULL)
6483 {
6484 code_sec = fh->elf.root.u.def.section;
6485 code_sec->flags |= SEC_KEEP;
6486 }
6487 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6488 && opd_entry_value (eh->elf.root.u.def.section,
6489 eh->elf.root.u.def.value,
6490 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6491 code_sec->flags |= SEC_KEEP;
6492 }
6493
6494 return TRUE;
6495 }
6496
6497 /* Return the section that should be marked against GC for a given
6498 relocation. */
6499
6500 static asection *
6501 ppc64_elf_gc_mark_hook (asection *sec,
6502 struct bfd_link_info *info,
6503 Elf_Internal_Rela *rel,
6504 struct elf_link_hash_entry *h,
6505 Elf_Internal_Sym *sym)
6506 {
6507 asection *rsec;
6508
6509 /* Syms return NULL if we're marking .opd, so we avoid marking all
6510 function sections, as all functions are referenced in .opd. */
6511 rsec = NULL;
6512 if (get_opd_info (sec) != NULL)
6513 return rsec;
6514
6515 if (h != NULL)
6516 {
6517 enum elf_ppc64_reloc_type r_type;
6518 struct ppc_link_hash_entry *eh, *fh, *fdh;
6519
6520 r_type = ELF64_R_TYPE (rel->r_info);
6521 switch (r_type)
6522 {
6523 case R_PPC64_GNU_VTINHERIT:
6524 case R_PPC64_GNU_VTENTRY:
6525 break;
6526
6527 default:
6528 switch (h->root.type)
6529 {
6530 case bfd_link_hash_defined:
6531 case bfd_link_hash_defweak:
6532 eh = (struct ppc_link_hash_entry *) h;
6533 fdh = defined_func_desc (eh);
6534 if (fdh != NULL)
6535 {
6536 /* -mcall-aixdesc code references the dot-symbol on
6537 a call reloc. Mark the function descriptor too
6538 against garbage collection. */
6539 fdh->elf.mark = 1;
6540 if (fdh->elf.u.weakdef != NULL)
6541 fdh->elf.u.weakdef->mark = 1;
6542 eh = fdh;
6543 }
6544
6545 /* Function descriptor syms cause the associated
6546 function code sym section to be marked. */
6547 fh = defined_code_entry (eh);
6548 if (fh != NULL)
6549 {
6550 /* They also mark their opd section. */
6551 eh->elf.root.u.def.section->gc_mark = 1;
6552
6553 rsec = fh->elf.root.u.def.section;
6554 }
6555 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6556 && opd_entry_value (eh->elf.root.u.def.section,
6557 eh->elf.root.u.def.value,
6558 &rsec, NULL, FALSE) != (bfd_vma) -1)
6559 eh->elf.root.u.def.section->gc_mark = 1;
6560 else
6561 rsec = h->root.u.def.section;
6562 break;
6563
6564 case bfd_link_hash_common:
6565 rsec = h->root.u.c.p->section;
6566 break;
6567
6568 default:
6569 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6570 }
6571 }
6572 }
6573 else
6574 {
6575 struct _opd_sec_data *opd;
6576
6577 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6578 opd = get_opd_info (rsec);
6579 if (opd != NULL && opd->func_sec != NULL)
6580 {
6581 rsec->gc_mark = 1;
6582
6583 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6584 }
6585 }
6586
6587 return rsec;
6588 }
6589
6590 /* Update the .got, .plt. and dynamic reloc reference counts for the
6591 section being removed. */
6592
6593 static bfd_boolean
6594 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6595 asection *sec, const Elf_Internal_Rela *relocs)
6596 {
6597 struct ppc_link_hash_table *htab;
6598 Elf_Internal_Shdr *symtab_hdr;
6599 struct elf_link_hash_entry **sym_hashes;
6600 struct got_entry **local_got_ents;
6601 const Elf_Internal_Rela *rel, *relend;
6602
6603 if (bfd_link_relocatable (info))
6604 return TRUE;
6605
6606 if ((sec->flags & SEC_ALLOC) == 0)
6607 return TRUE;
6608
6609 elf_section_data (sec)->local_dynrel = NULL;
6610
6611 htab = ppc_hash_table (info);
6612 if (htab == NULL)
6613 return FALSE;
6614
6615 symtab_hdr = &elf_symtab_hdr (abfd);
6616 sym_hashes = elf_sym_hashes (abfd);
6617 local_got_ents = elf_local_got_ents (abfd);
6618
6619 relend = relocs + sec->reloc_count;
6620 for (rel = relocs; rel < relend; rel++)
6621 {
6622 unsigned long r_symndx;
6623 enum elf_ppc64_reloc_type r_type;
6624 struct elf_link_hash_entry *h = NULL;
6625 struct plt_entry **plt_list = NULL;
6626 unsigned char tls_type = 0;
6627
6628 r_symndx = ELF64_R_SYM (rel->r_info);
6629 r_type = ELF64_R_TYPE (rel->r_info);
6630 if (r_symndx >= symtab_hdr->sh_info)
6631 {
6632 struct ppc_link_hash_entry *eh;
6633 struct elf_dyn_relocs **pp;
6634 struct elf_dyn_relocs *p;
6635
6636 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6637 h = elf_follow_link (h);
6638 eh = (struct ppc_link_hash_entry *) h;
6639
6640 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6641 if (p->sec == sec)
6642 {
6643 /* Everything must go for SEC. */
6644 *pp = p->next;
6645 break;
6646 }
6647 }
6648
6649 switch (r_type)
6650 {
6651 case R_PPC64_GOT_TLSLD16:
6652 case R_PPC64_GOT_TLSLD16_LO:
6653 case R_PPC64_GOT_TLSLD16_HI:
6654 case R_PPC64_GOT_TLSLD16_HA:
6655 tls_type = TLS_TLS | TLS_LD;
6656 goto dogot;
6657
6658 case R_PPC64_GOT_TLSGD16:
6659 case R_PPC64_GOT_TLSGD16_LO:
6660 case R_PPC64_GOT_TLSGD16_HI:
6661 case R_PPC64_GOT_TLSGD16_HA:
6662 tls_type = TLS_TLS | TLS_GD;
6663 goto dogot;
6664
6665 case R_PPC64_GOT_TPREL16_DS:
6666 case R_PPC64_GOT_TPREL16_LO_DS:
6667 case R_PPC64_GOT_TPREL16_HI:
6668 case R_PPC64_GOT_TPREL16_HA:
6669 tls_type = TLS_TLS | TLS_TPREL;
6670 goto dogot;
6671
6672 case R_PPC64_GOT_DTPREL16_DS:
6673 case R_PPC64_GOT_DTPREL16_LO_DS:
6674 case R_PPC64_GOT_DTPREL16_HI:
6675 case R_PPC64_GOT_DTPREL16_HA:
6676 tls_type = TLS_TLS | TLS_DTPREL;
6677 goto dogot;
6678
6679 case R_PPC64_GOT16:
6680 case R_PPC64_GOT16_DS:
6681 case R_PPC64_GOT16_HA:
6682 case R_PPC64_GOT16_HI:
6683 case R_PPC64_GOT16_LO:
6684 case R_PPC64_GOT16_LO_DS:
6685 dogot:
6686 {
6687 struct got_entry *ent;
6688
6689 if (h != NULL)
6690 ent = h->got.glist;
6691 else
6692 ent = local_got_ents[r_symndx];
6693
6694 for (; ent != NULL; ent = ent->next)
6695 if (ent->addend == rel->r_addend
6696 && ent->owner == abfd
6697 && ent->tls_type == tls_type)
6698 break;
6699 if (ent == NULL)
6700 abort ();
6701 if (ent->got.refcount > 0)
6702 ent->got.refcount -= 1;
6703 }
6704 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
6705 plt_list = &h->plt.plist;
6706 break;
6707
6708 case R_PPC64_PLT16_HA:
6709 case R_PPC64_PLT16_HI:
6710 case R_PPC64_PLT16_LO:
6711 case R_PPC64_PLT32:
6712 case R_PPC64_PLT64:
6713 case R_PPC64_REL14:
6714 case R_PPC64_REL14_BRNTAKEN:
6715 case R_PPC64_REL14_BRTAKEN:
6716 case R_PPC64_REL24:
6717 if (h != NULL)
6718 plt_list = &h->plt.plist;
6719 else if (local_got_ents != NULL)
6720 {
6721 struct plt_entry **local_plt = (struct plt_entry **)
6722 (local_got_ents + symtab_hdr->sh_info);
6723 unsigned char *local_got_tls_masks = (unsigned char *)
6724 (local_plt + symtab_hdr->sh_info);
6725 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6726 plt_list = local_plt + r_symndx;
6727 }
6728 break;
6729
6730 case R_PPC64_ADDR64:
6731 case R_PPC64_ADDR16:
6732 case R_PPC64_ADDR16_DS:
6733 case R_PPC64_ADDR16_HA:
6734 case R_PPC64_ADDR16_HI:
6735 case R_PPC64_ADDR16_HIGH:
6736 case R_PPC64_ADDR16_HIGHA:
6737 case R_PPC64_ADDR16_HIGHER:
6738 case R_PPC64_ADDR16_HIGHERA:
6739 case R_PPC64_ADDR16_HIGHEST:
6740 case R_PPC64_ADDR16_HIGHESTA:
6741 case R_PPC64_ADDR16_LO:
6742 case R_PPC64_ADDR16_LO_DS:
6743 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
6744 && rel->r_addend == 0)
6745 plt_list = &h->plt.plist;
6746 break;
6747
6748 default:
6749 break;
6750 }
6751 if (plt_list != NULL)
6752 {
6753 struct plt_entry *ent;
6754
6755 for (ent = *plt_list; ent != NULL; ent = ent->next)
6756 if (ent->addend == rel->r_addend)
6757 break;
6758 if (ent != NULL && ent->plt.refcount > 0)
6759 ent->plt.refcount -= 1;
6760 }
6761 }
6762 return TRUE;
6763 }
6764
6765 /* The maximum size of .sfpr. */
6766 #define SFPR_MAX (218*4)
6767
6768 struct sfpr_def_parms
6769 {
6770 const char name[12];
6771 unsigned char lo, hi;
6772 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6773 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6774 };
6775
6776 /* Auto-generate _save*, _rest* functions in .sfpr.
6777 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6778 instead. */
6779
6780 static bfd_boolean
6781 sfpr_define (struct bfd_link_info *info,
6782 const struct sfpr_def_parms *parm,
6783 asection *stub_sec)
6784 {
6785 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6786 unsigned int i;
6787 size_t len = strlen (parm->name);
6788 bfd_boolean writing = FALSE;
6789 char sym[16];
6790
6791 if (htab == NULL)
6792 return FALSE;
6793
6794 memcpy (sym, parm->name, len);
6795 sym[len + 2] = 0;
6796
6797 for (i = parm->lo; i <= parm->hi; i++)
6798 {
6799 struct ppc_link_hash_entry *h;
6800
6801 sym[len + 0] = i / 10 + '0';
6802 sym[len + 1] = i % 10 + '0';
6803 h = (struct ppc_link_hash_entry *)
6804 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6805 if (stub_sec != NULL)
6806 {
6807 if (h != NULL
6808 && h->elf.root.type == bfd_link_hash_defined
6809 && h->elf.root.u.def.section == htab->sfpr)
6810 {
6811 struct elf_link_hash_entry *s;
6812 char buf[32];
6813 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6814 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6815 if (s == NULL)
6816 return FALSE;
6817 if (s->root.type == bfd_link_hash_new
6818 || (s->root.type = bfd_link_hash_defined
6819 && s->root.u.def.section == stub_sec))
6820 {
6821 s->root.type = bfd_link_hash_defined;
6822 s->root.u.def.section = stub_sec;
6823 s->root.u.def.value = (stub_sec->size
6824 + h->elf.root.u.def.value);
6825 s->ref_regular = 1;
6826 s->def_regular = 1;
6827 s->ref_regular_nonweak = 1;
6828 s->forced_local = 1;
6829 s->non_elf = 0;
6830 s->root.linker_def = 1;
6831 }
6832 }
6833 continue;
6834 }
6835 if (h != NULL)
6836 {
6837 h->save_res = 1;
6838 if (!h->elf.def_regular)
6839 {
6840 h->elf.root.type = bfd_link_hash_defined;
6841 h->elf.root.u.def.section = htab->sfpr;
6842 h->elf.root.u.def.value = htab->sfpr->size;
6843 h->elf.type = STT_FUNC;
6844 h->elf.def_regular = 1;
6845 h->elf.non_elf = 0;
6846 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6847 writing = TRUE;
6848 if (htab->sfpr->contents == NULL)
6849 {
6850 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6851 if (htab->sfpr->contents == NULL)
6852 return FALSE;
6853 }
6854 }
6855 }
6856 if (writing)
6857 {
6858 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6859 if (i != parm->hi)
6860 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6861 else
6862 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6863 htab->sfpr->size = p - htab->sfpr->contents;
6864 }
6865 }
6866
6867 return TRUE;
6868 }
6869
6870 static bfd_byte *
6871 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6872 {
6873 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6874 return p + 4;
6875 }
6876
6877 static bfd_byte *
6878 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6879 {
6880 p = savegpr0 (abfd, p, r);
6881 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6882 p = p + 4;
6883 bfd_put_32 (abfd, BLR, p);
6884 return p + 4;
6885 }
6886
6887 static bfd_byte *
6888 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6889 {
6890 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6891 return p + 4;
6892 }
6893
6894 static bfd_byte *
6895 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6896 {
6897 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6898 p = p + 4;
6899 p = restgpr0 (abfd, p, r);
6900 bfd_put_32 (abfd, MTLR_R0, p);
6901 p = p + 4;
6902 if (r == 29)
6903 {
6904 p = restgpr0 (abfd, p, 30);
6905 p = restgpr0 (abfd, p, 31);
6906 }
6907 bfd_put_32 (abfd, BLR, p);
6908 return p + 4;
6909 }
6910
6911 static bfd_byte *
6912 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6913 {
6914 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6915 return p + 4;
6916 }
6917
6918 static bfd_byte *
6919 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6920 {
6921 p = savegpr1 (abfd, p, r);
6922 bfd_put_32 (abfd, BLR, p);
6923 return p + 4;
6924 }
6925
6926 static bfd_byte *
6927 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6928 {
6929 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6930 return p + 4;
6931 }
6932
6933 static bfd_byte *
6934 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6935 {
6936 p = restgpr1 (abfd, p, r);
6937 bfd_put_32 (abfd, BLR, p);
6938 return p + 4;
6939 }
6940
6941 static bfd_byte *
6942 savefpr (bfd *abfd, bfd_byte *p, int r)
6943 {
6944 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6945 return p + 4;
6946 }
6947
6948 static bfd_byte *
6949 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6950 {
6951 p = savefpr (abfd, p, r);
6952 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6953 p = p + 4;
6954 bfd_put_32 (abfd, BLR, p);
6955 return p + 4;
6956 }
6957
6958 static bfd_byte *
6959 restfpr (bfd *abfd, bfd_byte *p, int r)
6960 {
6961 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6962 return p + 4;
6963 }
6964
6965 static bfd_byte *
6966 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6967 {
6968 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6969 p = p + 4;
6970 p = restfpr (abfd, p, r);
6971 bfd_put_32 (abfd, MTLR_R0, p);
6972 p = p + 4;
6973 if (r == 29)
6974 {
6975 p = restfpr (abfd, p, 30);
6976 p = restfpr (abfd, p, 31);
6977 }
6978 bfd_put_32 (abfd, BLR, p);
6979 return p + 4;
6980 }
6981
6982 static bfd_byte *
6983 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6984 {
6985 p = savefpr (abfd, p, r);
6986 bfd_put_32 (abfd, BLR, p);
6987 return p + 4;
6988 }
6989
6990 static bfd_byte *
6991 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6992 {
6993 p = restfpr (abfd, p, r);
6994 bfd_put_32 (abfd, BLR, p);
6995 return p + 4;
6996 }
6997
6998 static bfd_byte *
6999 savevr (bfd *abfd, bfd_byte *p, int r)
7000 {
7001 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7002 p = p + 4;
7003 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
7004 return p + 4;
7005 }
7006
7007 static bfd_byte *
7008 savevr_tail (bfd *abfd, bfd_byte *p, int r)
7009 {
7010 p = savevr (abfd, p, r);
7011 bfd_put_32 (abfd, BLR, p);
7012 return p + 4;
7013 }
7014
7015 static bfd_byte *
7016 restvr (bfd *abfd, bfd_byte *p, int r)
7017 {
7018 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7019 p = p + 4;
7020 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
7021 return p + 4;
7022 }
7023
7024 static bfd_byte *
7025 restvr_tail (bfd *abfd, bfd_byte *p, int r)
7026 {
7027 p = restvr (abfd, p, r);
7028 bfd_put_32 (abfd, BLR, p);
7029 return p + 4;
7030 }
7031
7032 /* Called via elf_link_hash_traverse to transfer dynamic linking
7033 information on function code symbol entries to their corresponding
7034 function descriptor symbol entries. */
7035
7036 static bfd_boolean
7037 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
7038 {
7039 struct bfd_link_info *info;
7040 struct ppc_link_hash_table *htab;
7041 struct ppc_link_hash_entry *fh;
7042 struct ppc_link_hash_entry *fdh;
7043 bfd_boolean force_local;
7044
7045 fh = (struct ppc_link_hash_entry *) h;
7046 if (fh->elf.root.type == bfd_link_hash_indirect)
7047 return TRUE;
7048
7049 if (!fh->is_func)
7050 return TRUE;
7051
7052 if (fh->elf.root.root.string[0] != '.'
7053 || fh->elf.root.root.string[1] == '\0')
7054 return TRUE;
7055
7056 info = inf;
7057 htab = ppc_hash_table (info);
7058 if (htab == NULL)
7059 return FALSE;
7060
7061 /* Find the corresponding function descriptor symbol. */
7062 fdh = lookup_fdh (fh, htab);
7063
7064 /* Resolve undefined references to dot-symbols as the value
7065 in the function descriptor, if we have one in a regular object.
7066 This is to satisfy cases like ".quad .foo". Calls to functions
7067 in dynamic objects are handled elsewhere. */
7068 if ((fh->elf.root.type == bfd_link_hash_undefined
7069 || fh->elf.root.type == bfd_link_hash_undefweak)
7070 && (fdh->elf.root.type == bfd_link_hash_defined
7071 || fdh->elf.root.type == bfd_link_hash_defweak)
7072 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7073 && opd_entry_value (fdh->elf.root.u.def.section,
7074 fdh->elf.root.u.def.value,
7075 &fh->elf.root.u.def.section,
7076 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7077 {
7078 fh->elf.root.type = fdh->elf.root.type;
7079 fh->elf.forced_local = 1;
7080 fh->elf.def_regular = fdh->elf.def_regular;
7081 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7082 }
7083
7084 if (!fh->elf.dynamic)
7085 {
7086 struct plt_entry *ent;
7087
7088 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7089 if (ent->plt.refcount > 0)
7090 break;
7091 if (ent == NULL)
7092 return TRUE;
7093 }
7094
7095 /* Create a descriptor as undefined if necessary. */
7096 if (fdh == NULL
7097 && !bfd_link_executable (info)
7098 && (fh->elf.root.type == bfd_link_hash_undefined
7099 || fh->elf.root.type == bfd_link_hash_undefweak))
7100 {
7101 fdh = make_fdh (info, fh);
7102 if (fdh == NULL)
7103 return FALSE;
7104 }
7105
7106 /* We can't support overriding of symbols on a fake descriptor. */
7107 if (fdh != NULL
7108 && fdh->fake
7109 && (fh->elf.root.type == bfd_link_hash_defined
7110 || fh->elf.root.type == bfd_link_hash_defweak))
7111 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7112
7113 /* Transfer dynamic linking information to the function descriptor. */
7114 if (fdh != NULL)
7115 {
7116 fdh->elf.ref_regular |= fh->elf.ref_regular;
7117 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7118 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7119 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7120 fdh->elf.dynamic |= fh->elf.dynamic;
7121 fdh->elf.needs_plt |= (fh->elf.needs_plt
7122 || fh->elf.type == STT_FUNC
7123 || fh->elf.type == STT_GNU_IFUNC);
7124 move_plt_plist (fh, fdh);
7125
7126 if (!fdh->elf.forced_local
7127 && fh->elf.dynindx != -1)
7128 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7129 return FALSE;
7130 }
7131
7132 /* Now that the info is on the function descriptor, clear the
7133 function code sym info. Any function code syms for which we
7134 don't have a definition in a regular file, we force local.
7135 This prevents a shared library from exporting syms that have
7136 been imported from another library. Function code syms that
7137 are really in the library we must leave global to prevent the
7138 linker dragging in a definition from a static library. */
7139 force_local = (!fh->elf.def_regular
7140 || fdh == NULL
7141 || !fdh->elf.def_regular
7142 || fdh->elf.forced_local);
7143 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7144
7145 return TRUE;
7146 }
7147
7148 static const struct sfpr_def_parms save_res_funcs[] =
7149 {
7150 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7151 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7152 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7153 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7154 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7155 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7156 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7157 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7158 { "._savef", 14, 31, savefpr, savefpr1_tail },
7159 { "._restf", 14, 31, restfpr, restfpr1_tail },
7160 { "_savevr_", 20, 31, savevr, savevr_tail },
7161 { "_restvr_", 20, 31, restvr, restvr_tail }
7162 };
7163
7164 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7165 this hook to a) provide some gcc support functions, and b) transfer
7166 dynamic linking information gathered so far on function code symbol
7167 entries, to their corresponding function descriptor symbol entries. */
7168
7169 static bfd_boolean
7170 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7171 struct bfd_link_info *info)
7172 {
7173 struct ppc_link_hash_table *htab;
7174
7175 htab = ppc_hash_table (info);
7176 if (htab == NULL)
7177 return FALSE;
7178
7179 /* Provide any missing _save* and _rest* functions. */
7180 if (htab->sfpr != NULL)
7181 {
7182 unsigned int i;
7183
7184 htab->sfpr->size = 0;
7185 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7186 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7187 return FALSE;
7188 if (htab->sfpr->size == 0)
7189 htab->sfpr->flags |= SEC_EXCLUDE;
7190 }
7191
7192 if (bfd_link_relocatable (info))
7193 return TRUE;
7194
7195 if (htab->elf.hgot != NULL)
7196 {
7197 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7198 /* Make .TOC. defined so as to prevent it being made dynamic.
7199 The wrong value here is fixed later in ppc64_elf_set_toc. */
7200 if (!htab->elf.hgot->def_regular
7201 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7202 {
7203 htab->elf.hgot->root.type = bfd_link_hash_defined;
7204 htab->elf.hgot->root.u.def.value = 0;
7205 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7206 htab->elf.hgot->def_regular = 1;
7207 htab->elf.hgot->root.linker_def = 1;
7208 }
7209 htab->elf.hgot->type = STT_OBJECT;
7210 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7211 | STV_HIDDEN);
7212 }
7213
7214 if (htab->need_func_desc_adj)
7215 {
7216 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7217 htab->need_func_desc_adj = 0;
7218 }
7219
7220 return TRUE;
7221 }
7222
7223 /* Return true if we have dynamic relocs against H that apply to
7224 read-only sections. */
7225
7226 static bfd_boolean
7227 readonly_dynrelocs (struct elf_link_hash_entry *h)
7228 {
7229 struct ppc_link_hash_entry *eh;
7230 struct elf_dyn_relocs *p;
7231
7232 eh = (struct ppc_link_hash_entry *) h;
7233 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7234 {
7235 asection *s = p->sec->output_section;
7236
7237 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7238 return TRUE;
7239 }
7240 return FALSE;
7241 }
7242
7243 /* Return true if we have dynamic relocs against H or any of its weak
7244 aliases, that apply to read-only sections. */
7245
7246 static bfd_boolean
7247 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7248 {
7249 struct ppc_link_hash_entry *eh;
7250
7251 eh = (struct ppc_link_hash_entry *) h;
7252 do
7253 {
7254 if (readonly_dynrelocs (&eh->elf))
7255 return TRUE;
7256 eh = eh->weakref;
7257 } while (eh != NULL && &eh->elf != h);
7258
7259 return FALSE;
7260 }
7261
7262 /* Return whether EH has pc-relative dynamic relocs. */
7263
7264 static bfd_boolean
7265 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7266 {
7267 struct elf_dyn_relocs *p;
7268
7269 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7270 if (p->pc_count != 0)
7271 return TRUE;
7272 return FALSE;
7273 }
7274
7275 /* Return true if a global entry stub will be created for H. Valid
7276 for ELFv2 before plt entries have been allocated. */
7277
7278 static bfd_boolean
7279 global_entry_stub (struct elf_link_hash_entry *h)
7280 {
7281 struct plt_entry *pent;
7282
7283 if (!h->pointer_equality_needed
7284 || h->def_regular)
7285 return FALSE;
7286
7287 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7288 if (pent->plt.refcount > 0
7289 && pent->addend == 0)
7290 return TRUE;
7291
7292 return FALSE;
7293 }
7294
7295 /* Adjust a symbol defined by a dynamic object and referenced by a
7296 regular object. The current definition is in some section of the
7297 dynamic object, but we're not including those sections. We have to
7298 change the definition to something the rest of the link can
7299 understand. */
7300
7301 static bfd_boolean
7302 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7303 struct elf_link_hash_entry *h)
7304 {
7305 struct ppc_link_hash_table *htab;
7306 asection *s, *srel;
7307
7308 htab = ppc_hash_table (info);
7309 if (htab == NULL)
7310 return FALSE;
7311
7312 /* Deal with function syms. */
7313 if (h->type == STT_FUNC
7314 || h->type == STT_GNU_IFUNC
7315 || h->needs_plt)
7316 {
7317 /* Clear procedure linkage table information for any symbol that
7318 won't need a .plt entry. */
7319 struct plt_entry *ent;
7320 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7321 if (ent->plt.refcount > 0)
7322 break;
7323 if (ent == NULL
7324 || (h->type != STT_GNU_IFUNC
7325 && (SYMBOL_CALLS_LOCAL (info, h)
7326 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7327 || ((struct ppc_link_hash_entry *) h)->save_res)
7328 {
7329 h->plt.plist = NULL;
7330 h->needs_plt = 0;
7331 h->pointer_equality_needed = 0;
7332 }
7333 else if (abiversion (info->output_bfd) >= 2)
7334 {
7335 /* Taking a function's address in a read/write section
7336 doesn't require us to define the function symbol in the
7337 executable on a global entry stub. A dynamic reloc can
7338 be used instead. The reason we prefer a few more dynamic
7339 relocs is that calling via a global entry stub costs a
7340 few more instructions, and pointer_equality_needed causes
7341 extra work in ld.so when resolving these symbols. */
7342 if (global_entry_stub (h)
7343 && !alias_readonly_dynrelocs (h))
7344 {
7345 h->pointer_equality_needed = 0;
7346 /* After adjust_dynamic_symbol, non_got_ref set in
7347 the non-pic case means that dyn_relocs for this
7348 symbol should be discarded. */
7349 h->non_got_ref = 0;
7350 }
7351
7352 /* If making a plt entry, then we don't need copy relocs. */
7353 return TRUE;
7354 }
7355 }
7356 else
7357 h->plt.plist = NULL;
7358
7359 /* If this is a weak symbol, and there is a real definition, the
7360 processor independent code will have arranged for us to see the
7361 real definition first, and we can just use the same value. */
7362 if (h->u.weakdef != NULL)
7363 {
7364 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7365 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7366 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7367 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7368 if (ELIMINATE_COPY_RELOCS)
7369 h->non_got_ref = h->u.weakdef->non_got_ref;
7370 return TRUE;
7371 }
7372
7373 /* If we are creating a shared library, we must presume that the
7374 only references to the symbol are via the global offset table.
7375 For such cases we need not do anything here; the relocations will
7376 be handled correctly by relocate_section. */
7377 if (bfd_link_pic (info))
7378 return TRUE;
7379
7380 /* If there are no references to this symbol that do not use the
7381 GOT, we don't need to generate a copy reloc. */
7382 if (!h->non_got_ref)
7383 return TRUE;
7384
7385 /* Don't generate a copy reloc for symbols defined in the executable. */
7386 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7387
7388 /* If -z nocopyreloc was given, don't generate them either. */
7389 || info->nocopyreloc
7390
7391 /* If we didn't find any dynamic relocs in read-only sections, then
7392 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7393 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7394
7395 /* Protected variables do not work with .dynbss. The copy in
7396 .dynbss won't be used by the shared library with the protected
7397 definition for the variable. Text relocations are preferable
7398 to an incorrect program. */
7399 || h->protected_def)
7400 {
7401 h->non_got_ref = 0;
7402 return TRUE;
7403 }
7404
7405 if (h->plt.plist != NULL)
7406 {
7407 /* We should never get here, but unfortunately there are versions
7408 of gcc out there that improperly (for this ABI) put initialized
7409 function pointers, vtable refs and suchlike in read-only
7410 sections. Allow them to proceed, but warn that this might
7411 break at runtime. */
7412 info->callbacks->einfo
7413 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7414 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7415 h->root.root.string);
7416 }
7417
7418 /* This is a reference to a symbol defined by a dynamic object which
7419 is not a function. */
7420
7421 /* We must allocate the symbol in our .dynbss section, which will
7422 become part of the .bss section of the executable. There will be
7423 an entry for this symbol in the .dynsym section. The dynamic
7424 object will contain position independent code, so all references
7425 from the dynamic object to this symbol will go through the global
7426 offset table. The dynamic linker will use the .dynsym entry to
7427 determine the address it must put in the global offset table, so
7428 both the dynamic object and the regular object will refer to the
7429 same memory location for the variable. */
7430
7431 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7432 to copy the initial value out of the dynamic object and into the
7433 runtime process image. We need to remember the offset into the
7434 .rela.bss section we are going to use. */
7435 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7436 {
7437 s = htab->elf.sdynrelro;
7438 srel = htab->elf.sreldynrelro;
7439 }
7440 else
7441 {
7442 s = htab->elf.sdynbss;
7443 srel = htab->elf.srelbss;
7444 }
7445 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7446 {
7447 srel->size += sizeof (Elf64_External_Rela);
7448 h->needs_copy = 1;
7449 }
7450
7451 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7452 }
7453
7454 /* If given a function descriptor symbol, hide both the function code
7455 sym and the descriptor. */
7456 static void
7457 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7458 struct elf_link_hash_entry *h,
7459 bfd_boolean force_local)
7460 {
7461 struct ppc_link_hash_entry *eh;
7462 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7463
7464 eh = (struct ppc_link_hash_entry *) h;
7465 if (eh->is_func_descriptor)
7466 {
7467 struct ppc_link_hash_entry *fh = eh->oh;
7468
7469 if (fh == NULL)
7470 {
7471 const char *p, *q;
7472 struct elf_link_hash_table *htab = elf_hash_table (info);
7473 char save;
7474
7475 /* We aren't supposed to use alloca in BFD because on
7476 systems which do not have alloca the version in libiberty
7477 calls xmalloc, which might cause the program to crash
7478 when it runs out of memory. This function doesn't have a
7479 return status, so there's no way to gracefully return an
7480 error. So cheat. We know that string[-1] can be safely
7481 accessed; It's either a string in an ELF string table,
7482 or allocated in an objalloc structure. */
7483
7484 p = eh->elf.root.root.string - 1;
7485 save = *p;
7486 *(char *) p = '.';
7487 fh = (struct ppc_link_hash_entry *)
7488 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7489 *(char *) p = save;
7490
7491 /* Unfortunately, if it so happens that the string we were
7492 looking for was allocated immediately before this string,
7493 then we overwrote the string terminator. That's the only
7494 reason the lookup should fail. */
7495 if (fh == NULL)
7496 {
7497 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7498 while (q >= eh->elf.root.root.string && *q == *p)
7499 --q, --p;
7500 if (q < eh->elf.root.root.string && *p == '.')
7501 fh = (struct ppc_link_hash_entry *)
7502 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7503 }
7504 if (fh != NULL)
7505 {
7506 eh->oh = fh;
7507 fh->oh = eh;
7508 }
7509 }
7510 if (fh != NULL)
7511 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7512 }
7513 }
7514
7515 static bfd_boolean
7516 get_sym_h (struct elf_link_hash_entry **hp,
7517 Elf_Internal_Sym **symp,
7518 asection **symsecp,
7519 unsigned char **tls_maskp,
7520 Elf_Internal_Sym **locsymsp,
7521 unsigned long r_symndx,
7522 bfd *ibfd)
7523 {
7524 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7525
7526 if (r_symndx >= symtab_hdr->sh_info)
7527 {
7528 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7529 struct elf_link_hash_entry *h;
7530
7531 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7532 h = elf_follow_link (h);
7533
7534 if (hp != NULL)
7535 *hp = h;
7536
7537 if (symp != NULL)
7538 *symp = NULL;
7539
7540 if (symsecp != NULL)
7541 {
7542 asection *symsec = NULL;
7543 if (h->root.type == bfd_link_hash_defined
7544 || h->root.type == bfd_link_hash_defweak)
7545 symsec = h->root.u.def.section;
7546 *symsecp = symsec;
7547 }
7548
7549 if (tls_maskp != NULL)
7550 {
7551 struct ppc_link_hash_entry *eh;
7552
7553 eh = (struct ppc_link_hash_entry *) h;
7554 *tls_maskp = &eh->tls_mask;
7555 }
7556 }
7557 else
7558 {
7559 Elf_Internal_Sym *sym;
7560 Elf_Internal_Sym *locsyms = *locsymsp;
7561
7562 if (locsyms == NULL)
7563 {
7564 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7565 if (locsyms == NULL)
7566 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7567 symtab_hdr->sh_info,
7568 0, NULL, NULL, NULL);
7569 if (locsyms == NULL)
7570 return FALSE;
7571 *locsymsp = locsyms;
7572 }
7573 sym = locsyms + r_symndx;
7574
7575 if (hp != NULL)
7576 *hp = NULL;
7577
7578 if (symp != NULL)
7579 *symp = sym;
7580
7581 if (symsecp != NULL)
7582 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7583
7584 if (tls_maskp != NULL)
7585 {
7586 struct got_entry **lgot_ents;
7587 unsigned char *tls_mask;
7588
7589 tls_mask = NULL;
7590 lgot_ents = elf_local_got_ents (ibfd);
7591 if (lgot_ents != NULL)
7592 {
7593 struct plt_entry **local_plt = (struct plt_entry **)
7594 (lgot_ents + symtab_hdr->sh_info);
7595 unsigned char *lgot_masks = (unsigned char *)
7596 (local_plt + symtab_hdr->sh_info);
7597 tls_mask = &lgot_masks[r_symndx];
7598 }
7599 *tls_maskp = tls_mask;
7600 }
7601 }
7602 return TRUE;
7603 }
7604
7605 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7606 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7607 type suitable for optimization, and 1 otherwise. */
7608
7609 static int
7610 get_tls_mask (unsigned char **tls_maskp,
7611 unsigned long *toc_symndx,
7612 bfd_vma *toc_addend,
7613 Elf_Internal_Sym **locsymsp,
7614 const Elf_Internal_Rela *rel,
7615 bfd *ibfd)
7616 {
7617 unsigned long r_symndx;
7618 int next_r;
7619 struct elf_link_hash_entry *h;
7620 Elf_Internal_Sym *sym;
7621 asection *sec;
7622 bfd_vma off;
7623
7624 r_symndx = ELF64_R_SYM (rel->r_info);
7625 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7626 return 0;
7627
7628 if ((*tls_maskp != NULL && **tls_maskp != 0)
7629 || sec == NULL
7630 || ppc64_elf_section_data (sec) == NULL
7631 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7632 return 1;
7633
7634 /* Look inside a TOC section too. */
7635 if (h != NULL)
7636 {
7637 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7638 off = h->root.u.def.value;
7639 }
7640 else
7641 off = sym->st_value;
7642 off += rel->r_addend;
7643 BFD_ASSERT (off % 8 == 0);
7644 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7645 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7646 if (toc_symndx != NULL)
7647 *toc_symndx = r_symndx;
7648 if (toc_addend != NULL)
7649 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7650 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7651 return 0;
7652 if ((h == NULL || is_static_defined (h))
7653 && (next_r == -1 || next_r == -2))
7654 return 1 - next_r;
7655 return 1;
7656 }
7657
7658 /* Find (or create) an entry in the tocsave hash table. */
7659
7660 static struct tocsave_entry *
7661 tocsave_find (struct ppc_link_hash_table *htab,
7662 enum insert_option insert,
7663 Elf_Internal_Sym **local_syms,
7664 const Elf_Internal_Rela *irela,
7665 bfd *ibfd)
7666 {
7667 unsigned long r_indx;
7668 struct elf_link_hash_entry *h;
7669 Elf_Internal_Sym *sym;
7670 struct tocsave_entry ent, *p;
7671 hashval_t hash;
7672 struct tocsave_entry **slot;
7673
7674 r_indx = ELF64_R_SYM (irela->r_info);
7675 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7676 return NULL;
7677 if (ent.sec == NULL || ent.sec->output_section == NULL)
7678 {
7679 _bfd_error_handler
7680 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7681 return NULL;
7682 }
7683
7684 if (h != NULL)
7685 ent.offset = h->root.u.def.value;
7686 else
7687 ent.offset = sym->st_value;
7688 ent.offset += irela->r_addend;
7689
7690 hash = tocsave_htab_hash (&ent);
7691 slot = ((struct tocsave_entry **)
7692 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7693 if (slot == NULL)
7694 return NULL;
7695
7696 if (*slot == NULL)
7697 {
7698 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7699 if (p == NULL)
7700 return NULL;
7701 *p = ent;
7702 *slot = p;
7703 }
7704 return *slot;
7705 }
7706
7707 /* Adjust all global syms defined in opd sections. In gcc generated
7708 code for the old ABI, these will already have been done. */
7709
7710 static bfd_boolean
7711 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7712 {
7713 struct ppc_link_hash_entry *eh;
7714 asection *sym_sec;
7715 struct _opd_sec_data *opd;
7716
7717 if (h->root.type == bfd_link_hash_indirect)
7718 return TRUE;
7719
7720 if (h->root.type != bfd_link_hash_defined
7721 && h->root.type != bfd_link_hash_defweak)
7722 return TRUE;
7723
7724 eh = (struct ppc_link_hash_entry *) h;
7725 if (eh->adjust_done)
7726 return TRUE;
7727
7728 sym_sec = eh->elf.root.u.def.section;
7729 opd = get_opd_info (sym_sec);
7730 if (opd != NULL && opd->adjust != NULL)
7731 {
7732 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7733 if (adjust == -1)
7734 {
7735 /* This entry has been deleted. */
7736 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7737 if (dsec == NULL)
7738 {
7739 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7740 if (discarded_section (dsec))
7741 {
7742 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7743 break;
7744 }
7745 }
7746 eh->elf.root.u.def.value = 0;
7747 eh->elf.root.u.def.section = dsec;
7748 }
7749 else
7750 eh->elf.root.u.def.value += adjust;
7751 eh->adjust_done = 1;
7752 }
7753 return TRUE;
7754 }
7755
7756 /* Handles decrementing dynamic reloc counts for the reloc specified by
7757 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7758 have already been determined. */
7759
7760 static bfd_boolean
7761 dec_dynrel_count (bfd_vma r_info,
7762 asection *sec,
7763 struct bfd_link_info *info,
7764 Elf_Internal_Sym **local_syms,
7765 struct elf_link_hash_entry *h,
7766 Elf_Internal_Sym *sym)
7767 {
7768 enum elf_ppc64_reloc_type r_type;
7769 asection *sym_sec = NULL;
7770
7771 /* Can this reloc be dynamic? This switch, and later tests here
7772 should be kept in sync with the code in check_relocs. */
7773 r_type = ELF64_R_TYPE (r_info);
7774 switch (r_type)
7775 {
7776 default:
7777 return TRUE;
7778
7779 case R_PPC64_TPREL16:
7780 case R_PPC64_TPREL16_LO:
7781 case R_PPC64_TPREL16_HI:
7782 case R_PPC64_TPREL16_HA:
7783 case R_PPC64_TPREL16_DS:
7784 case R_PPC64_TPREL16_LO_DS:
7785 case R_PPC64_TPREL16_HIGH:
7786 case R_PPC64_TPREL16_HIGHA:
7787 case R_PPC64_TPREL16_HIGHER:
7788 case R_PPC64_TPREL16_HIGHERA:
7789 case R_PPC64_TPREL16_HIGHEST:
7790 case R_PPC64_TPREL16_HIGHESTA:
7791 if (!bfd_link_pic (info))
7792 return TRUE;
7793
7794 case R_PPC64_TPREL64:
7795 case R_PPC64_DTPMOD64:
7796 case R_PPC64_DTPREL64:
7797 case R_PPC64_ADDR64:
7798 case R_PPC64_REL30:
7799 case R_PPC64_REL32:
7800 case R_PPC64_REL64:
7801 case R_PPC64_ADDR14:
7802 case R_PPC64_ADDR14_BRNTAKEN:
7803 case R_PPC64_ADDR14_BRTAKEN:
7804 case R_PPC64_ADDR16:
7805 case R_PPC64_ADDR16_DS:
7806 case R_PPC64_ADDR16_HA:
7807 case R_PPC64_ADDR16_HI:
7808 case R_PPC64_ADDR16_HIGH:
7809 case R_PPC64_ADDR16_HIGHA:
7810 case R_PPC64_ADDR16_HIGHER:
7811 case R_PPC64_ADDR16_HIGHERA:
7812 case R_PPC64_ADDR16_HIGHEST:
7813 case R_PPC64_ADDR16_HIGHESTA:
7814 case R_PPC64_ADDR16_LO:
7815 case R_PPC64_ADDR16_LO_DS:
7816 case R_PPC64_ADDR24:
7817 case R_PPC64_ADDR32:
7818 case R_PPC64_UADDR16:
7819 case R_PPC64_UADDR32:
7820 case R_PPC64_UADDR64:
7821 case R_PPC64_TOC:
7822 break;
7823 }
7824
7825 if (local_syms != NULL)
7826 {
7827 unsigned long r_symndx;
7828 bfd *ibfd = sec->owner;
7829
7830 r_symndx = ELF64_R_SYM (r_info);
7831 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7832 return FALSE;
7833 }
7834
7835 if ((bfd_link_pic (info)
7836 && (must_be_dyn_reloc (info, r_type)
7837 || (h != NULL
7838 && (!SYMBOLIC_BIND (info, h)
7839 || h->root.type == bfd_link_hash_defweak
7840 || !h->def_regular))))
7841 || (ELIMINATE_COPY_RELOCS
7842 && !bfd_link_pic (info)
7843 && h != NULL
7844 && (h->root.type == bfd_link_hash_defweak
7845 || !h->def_regular)))
7846 ;
7847 else
7848 return TRUE;
7849
7850 if (h != NULL)
7851 {
7852 struct elf_dyn_relocs *p;
7853 struct elf_dyn_relocs **pp;
7854 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7855
7856 /* elf_gc_sweep may have already removed all dyn relocs associated
7857 with local syms for a given section. Also, symbol flags are
7858 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7859 report a dynreloc miscount. */
7860 if (*pp == NULL && info->gc_sections)
7861 return TRUE;
7862
7863 while ((p = *pp) != NULL)
7864 {
7865 if (p->sec == sec)
7866 {
7867 if (!must_be_dyn_reloc (info, r_type))
7868 p->pc_count -= 1;
7869 p->count -= 1;
7870 if (p->count == 0)
7871 *pp = p->next;
7872 return TRUE;
7873 }
7874 pp = &p->next;
7875 }
7876 }
7877 else
7878 {
7879 struct ppc_dyn_relocs *p;
7880 struct ppc_dyn_relocs **pp;
7881 void *vpp;
7882 bfd_boolean is_ifunc;
7883
7884 if (local_syms == NULL)
7885 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7886 if (sym_sec == NULL)
7887 sym_sec = sec;
7888
7889 vpp = &elf_section_data (sym_sec)->local_dynrel;
7890 pp = (struct ppc_dyn_relocs **) vpp;
7891
7892 if (*pp == NULL && info->gc_sections)
7893 return TRUE;
7894
7895 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7896 while ((p = *pp) != NULL)
7897 {
7898 if (p->sec == sec && p->ifunc == is_ifunc)
7899 {
7900 p->count -= 1;
7901 if (p->count == 0)
7902 *pp = p->next;
7903 return TRUE;
7904 }
7905 pp = &p->next;
7906 }
7907 }
7908
7909 /* xgettext:c-format */
7910 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7911 sec->owner, sec);
7912 bfd_set_error (bfd_error_bad_value);
7913 return FALSE;
7914 }
7915
7916 /* Remove unused Official Procedure Descriptor entries. Currently we
7917 only remove those associated with functions in discarded link-once
7918 sections, or weakly defined functions that have been overridden. It
7919 would be possible to remove many more entries for statically linked
7920 applications. */
7921
7922 bfd_boolean
7923 ppc64_elf_edit_opd (struct bfd_link_info *info)
7924 {
7925 bfd *ibfd;
7926 bfd_boolean some_edited = FALSE;
7927 asection *need_pad = NULL;
7928 struct ppc_link_hash_table *htab;
7929
7930 htab = ppc_hash_table (info);
7931 if (htab == NULL)
7932 return FALSE;
7933
7934 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7935 {
7936 asection *sec;
7937 Elf_Internal_Rela *relstart, *rel, *relend;
7938 Elf_Internal_Shdr *symtab_hdr;
7939 Elf_Internal_Sym *local_syms;
7940 struct _opd_sec_data *opd;
7941 bfd_boolean need_edit, add_aux_fields, broken;
7942 bfd_size_type cnt_16b = 0;
7943
7944 if (!is_ppc64_elf (ibfd))
7945 continue;
7946
7947 sec = bfd_get_section_by_name (ibfd, ".opd");
7948 if (sec == NULL || sec->size == 0)
7949 continue;
7950
7951 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7952 continue;
7953
7954 if (sec->output_section == bfd_abs_section_ptr)
7955 continue;
7956
7957 /* Look through the section relocs. */
7958 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7959 continue;
7960
7961 local_syms = NULL;
7962 symtab_hdr = &elf_symtab_hdr (ibfd);
7963
7964 /* Read the relocations. */
7965 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7966 info->keep_memory);
7967 if (relstart == NULL)
7968 return FALSE;
7969
7970 /* First run through the relocs to check they are sane, and to
7971 determine whether we need to edit this opd section. */
7972 need_edit = FALSE;
7973 broken = FALSE;
7974 need_pad = sec;
7975 relend = relstart + sec->reloc_count;
7976 for (rel = relstart; rel < relend; )
7977 {
7978 enum elf_ppc64_reloc_type r_type;
7979 unsigned long r_symndx;
7980 asection *sym_sec;
7981 struct elf_link_hash_entry *h;
7982 Elf_Internal_Sym *sym;
7983 bfd_vma offset;
7984
7985 /* .opd contains an array of 16 or 24 byte entries. We're
7986 only interested in the reloc pointing to a function entry
7987 point. */
7988 offset = rel->r_offset;
7989 if (rel + 1 == relend
7990 || rel[1].r_offset != offset + 8)
7991 {
7992 /* If someone messes with .opd alignment then after a
7993 "ld -r" we might have padding in the middle of .opd.
7994 Also, there's nothing to prevent someone putting
7995 something silly in .opd with the assembler. No .opd
7996 optimization for them! */
7997 broken_opd:
7998 _bfd_error_handler
7999 (_("%B: .opd is not a regular array of opd entries"), ibfd);
8000 broken = TRUE;
8001 break;
8002 }
8003
8004 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
8005 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
8006 {
8007 _bfd_error_handler
8008 /* xgettext:c-format */
8009 (_("%B: unexpected reloc type %u in .opd section"),
8010 ibfd, r_type);
8011 broken = TRUE;
8012 break;
8013 }
8014
8015 r_symndx = ELF64_R_SYM (rel->r_info);
8016 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8017 r_symndx, ibfd))
8018 goto error_ret;
8019
8020 if (sym_sec == NULL || sym_sec->owner == NULL)
8021 {
8022 const char *sym_name;
8023 if (h != NULL)
8024 sym_name = h->root.root.string;
8025 else
8026 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8027 sym_sec);
8028
8029 _bfd_error_handler
8030 /* xgettext:c-format */
8031 (_("%B: undefined sym `%s' in .opd section"),
8032 ibfd, sym_name);
8033 broken = TRUE;
8034 break;
8035 }
8036
8037 /* opd entries are always for functions defined in the
8038 current input bfd. If the symbol isn't defined in the
8039 input bfd, then we won't be using the function in this
8040 bfd; It must be defined in a linkonce section in another
8041 bfd, or is weak. It's also possible that we are
8042 discarding the function due to a linker script /DISCARD/,
8043 which we test for via the output_section. */
8044 if (sym_sec->owner != ibfd
8045 || sym_sec->output_section == bfd_abs_section_ptr)
8046 need_edit = TRUE;
8047
8048 rel += 2;
8049 if (rel + 1 == relend
8050 || (rel + 2 < relend
8051 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8052 ++rel;
8053
8054 if (rel == relend)
8055 {
8056 if (sec->size == offset + 24)
8057 {
8058 need_pad = NULL;
8059 break;
8060 }
8061 if (sec->size == offset + 16)
8062 {
8063 cnt_16b++;
8064 break;
8065 }
8066 goto broken_opd;
8067 }
8068 else if (rel + 1 < relend
8069 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8070 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8071 {
8072 if (rel[0].r_offset == offset + 16)
8073 cnt_16b++;
8074 else if (rel[0].r_offset != offset + 24)
8075 goto broken_opd;
8076 }
8077 else
8078 goto broken_opd;
8079 }
8080
8081 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8082
8083 if (!broken && (need_edit || add_aux_fields))
8084 {
8085 Elf_Internal_Rela *write_rel;
8086 Elf_Internal_Shdr *rel_hdr;
8087 bfd_byte *rptr, *wptr;
8088 bfd_byte *new_contents;
8089 bfd_size_type amt;
8090
8091 new_contents = NULL;
8092 amt = OPD_NDX (sec->size) * sizeof (long);
8093 opd = &ppc64_elf_section_data (sec)->u.opd;
8094 opd->adjust = bfd_zalloc (sec->owner, amt);
8095 if (opd->adjust == NULL)
8096 return FALSE;
8097 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8098
8099 /* This seems a waste of time as input .opd sections are all
8100 zeros as generated by gcc, but I suppose there's no reason
8101 this will always be so. We might start putting something in
8102 the third word of .opd entries. */
8103 if ((sec->flags & SEC_IN_MEMORY) == 0)
8104 {
8105 bfd_byte *loc;
8106 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8107 {
8108 if (loc != NULL)
8109 free (loc);
8110 error_ret:
8111 if (local_syms != NULL
8112 && symtab_hdr->contents != (unsigned char *) local_syms)
8113 free (local_syms);
8114 if (elf_section_data (sec)->relocs != relstart)
8115 free (relstart);
8116 return FALSE;
8117 }
8118 sec->contents = loc;
8119 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8120 }
8121
8122 elf_section_data (sec)->relocs = relstart;
8123
8124 new_contents = sec->contents;
8125 if (add_aux_fields)
8126 {
8127 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8128 if (new_contents == NULL)
8129 return FALSE;
8130 need_pad = NULL;
8131 }
8132 wptr = new_contents;
8133 rptr = sec->contents;
8134 write_rel = relstart;
8135 for (rel = relstart; rel < relend; )
8136 {
8137 unsigned long r_symndx;
8138 asection *sym_sec;
8139 struct elf_link_hash_entry *h;
8140 struct ppc_link_hash_entry *fdh = NULL;
8141 Elf_Internal_Sym *sym;
8142 long opd_ent_size;
8143 Elf_Internal_Rela *next_rel;
8144 bfd_boolean skip;
8145
8146 r_symndx = ELF64_R_SYM (rel->r_info);
8147 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8148 r_symndx, ibfd))
8149 goto error_ret;
8150
8151 next_rel = rel + 2;
8152 if (next_rel + 1 == relend
8153 || (next_rel + 2 < relend
8154 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8155 ++next_rel;
8156
8157 /* See if the .opd entry is full 24 byte or
8158 16 byte (with fd_aux entry overlapped with next
8159 fd_func). */
8160 opd_ent_size = 24;
8161 if (next_rel == relend)
8162 {
8163 if (sec->size == rel->r_offset + 16)
8164 opd_ent_size = 16;
8165 }
8166 else if (next_rel->r_offset == rel->r_offset + 16)
8167 opd_ent_size = 16;
8168
8169 if (h != NULL
8170 && h->root.root.string[0] == '.')
8171 {
8172 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8173 if (fdh != NULL)
8174 {
8175 fdh = ppc_follow_link (fdh);
8176 if (fdh->elf.root.type != bfd_link_hash_defined
8177 && fdh->elf.root.type != bfd_link_hash_defweak)
8178 fdh = NULL;
8179 }
8180 }
8181
8182 skip = (sym_sec->owner != ibfd
8183 || sym_sec->output_section == bfd_abs_section_ptr);
8184 if (skip)
8185 {
8186 if (fdh != NULL && sym_sec->owner == ibfd)
8187 {
8188 /* Arrange for the function descriptor sym
8189 to be dropped. */
8190 fdh->elf.root.u.def.value = 0;
8191 fdh->elf.root.u.def.section = sym_sec;
8192 }
8193 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8194
8195 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8196 rel = next_rel;
8197 else
8198 while (1)
8199 {
8200 if (!dec_dynrel_count (rel->r_info, sec, info,
8201 NULL, h, sym))
8202 goto error_ret;
8203
8204 if (++rel == next_rel)
8205 break;
8206
8207 r_symndx = ELF64_R_SYM (rel->r_info);
8208 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8209 r_symndx, ibfd))
8210 goto error_ret;
8211 }
8212 }
8213 else
8214 {
8215 /* We'll be keeping this opd entry. */
8216 long adjust;
8217
8218 if (fdh != NULL)
8219 {
8220 /* Redefine the function descriptor symbol to
8221 this location in the opd section. It is
8222 necessary to update the value here rather
8223 than using an array of adjustments as we do
8224 for local symbols, because various places
8225 in the generic ELF code use the value
8226 stored in u.def.value. */
8227 fdh->elf.root.u.def.value = wptr - new_contents;
8228 fdh->adjust_done = 1;
8229 }
8230
8231 /* Local syms are a bit tricky. We could
8232 tweak them as they can be cached, but
8233 we'd need to look through the local syms
8234 for the function descriptor sym which we
8235 don't have at the moment. So keep an
8236 array of adjustments. */
8237 adjust = (wptr - new_contents) - (rptr - sec->contents);
8238 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8239
8240 if (wptr != rptr)
8241 memcpy (wptr, rptr, opd_ent_size);
8242 wptr += opd_ent_size;
8243 if (add_aux_fields && opd_ent_size == 16)
8244 {
8245 memset (wptr, '\0', 8);
8246 wptr += 8;
8247 }
8248
8249 /* We need to adjust any reloc offsets to point to the
8250 new opd entries. */
8251 for ( ; rel != next_rel; ++rel)
8252 {
8253 rel->r_offset += adjust;
8254 if (write_rel != rel)
8255 memcpy (write_rel, rel, sizeof (*rel));
8256 ++write_rel;
8257 }
8258 }
8259
8260 rptr += opd_ent_size;
8261 }
8262
8263 sec->size = wptr - new_contents;
8264 sec->reloc_count = write_rel - relstart;
8265 if (add_aux_fields)
8266 {
8267 free (sec->contents);
8268 sec->contents = new_contents;
8269 }
8270
8271 /* Fudge the header size too, as this is used later in
8272 elf_bfd_final_link if we are emitting relocs. */
8273 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8274 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8275 some_edited = TRUE;
8276 }
8277 else if (elf_section_data (sec)->relocs != relstart)
8278 free (relstart);
8279
8280 if (local_syms != NULL
8281 && symtab_hdr->contents != (unsigned char *) local_syms)
8282 {
8283 if (!info->keep_memory)
8284 free (local_syms);
8285 else
8286 symtab_hdr->contents = (unsigned char *) local_syms;
8287 }
8288 }
8289
8290 if (some_edited)
8291 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8292
8293 /* If we are doing a final link and the last .opd entry is just 16 byte
8294 long, add a 8 byte padding after it. */
8295 if (need_pad != NULL && !bfd_link_relocatable (info))
8296 {
8297 bfd_byte *p;
8298
8299 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8300 {
8301 BFD_ASSERT (need_pad->size > 0);
8302
8303 p = bfd_malloc (need_pad->size + 8);
8304 if (p == NULL)
8305 return FALSE;
8306
8307 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8308 p, 0, need_pad->size))
8309 return FALSE;
8310
8311 need_pad->contents = p;
8312 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8313 }
8314 else
8315 {
8316 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8317 if (p == NULL)
8318 return FALSE;
8319
8320 need_pad->contents = p;
8321 }
8322
8323 memset (need_pad->contents + need_pad->size, 0, 8);
8324 need_pad->size += 8;
8325 }
8326
8327 return TRUE;
8328 }
8329
8330 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8331
8332 asection *
8333 ppc64_elf_tls_setup (struct bfd_link_info *info)
8334 {
8335 struct ppc_link_hash_table *htab;
8336
8337 htab = ppc_hash_table (info);
8338 if (htab == NULL)
8339 return NULL;
8340
8341 if (abiversion (info->output_bfd) == 1)
8342 htab->opd_abi = 1;
8343
8344 if (htab->params->no_multi_toc)
8345 htab->do_multi_toc = 0;
8346 else if (!htab->do_multi_toc)
8347 htab->params->no_multi_toc = 1;
8348
8349 if (htab->params->plt_localentry0 < 0)
8350 htab->params->plt_localentry0
8351 = elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8352 FALSE, FALSE, FALSE) != NULL;
8353
8354 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8355 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8356 FALSE, FALSE, TRUE));
8357 /* Move dynamic linking info to the function descriptor sym. */
8358 if (htab->tls_get_addr != NULL)
8359 func_desc_adjust (&htab->tls_get_addr->elf, info);
8360 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8361 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8362 FALSE, FALSE, TRUE));
8363 if (htab->params->tls_get_addr_opt)
8364 {
8365 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8366
8367 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8368 FALSE, FALSE, TRUE);
8369 if (opt != NULL)
8370 func_desc_adjust (opt, info);
8371 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8372 FALSE, FALSE, TRUE);
8373 if (opt_fd != NULL
8374 && (opt_fd->root.type == bfd_link_hash_defined
8375 || opt_fd->root.type == bfd_link_hash_defweak))
8376 {
8377 /* If glibc supports an optimized __tls_get_addr call stub,
8378 signalled by the presence of __tls_get_addr_opt, and we'll
8379 be calling __tls_get_addr via a plt call stub, then
8380 make __tls_get_addr point to __tls_get_addr_opt. */
8381 tga_fd = &htab->tls_get_addr_fd->elf;
8382 if (htab->elf.dynamic_sections_created
8383 && tga_fd != NULL
8384 && (tga_fd->type == STT_FUNC
8385 || tga_fd->needs_plt)
8386 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8387 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8388 {
8389 struct plt_entry *ent;
8390
8391 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8392 if (ent->plt.refcount > 0)
8393 break;
8394 if (ent != NULL)
8395 {
8396 tga_fd->root.type = bfd_link_hash_indirect;
8397 tga_fd->root.u.i.link = &opt_fd->root;
8398 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8399 opt_fd->mark = 1;
8400 if (opt_fd->dynindx != -1)
8401 {
8402 /* Use __tls_get_addr_opt in dynamic relocations. */
8403 opt_fd->dynindx = -1;
8404 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8405 opt_fd->dynstr_index);
8406 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8407 return NULL;
8408 }
8409 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8410 tga = &htab->tls_get_addr->elf;
8411 if (opt != NULL && tga != NULL)
8412 {
8413 tga->root.type = bfd_link_hash_indirect;
8414 tga->root.u.i.link = &opt->root;
8415 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8416 opt->mark = 1;
8417 _bfd_elf_link_hash_hide_symbol (info, opt,
8418 tga->forced_local);
8419 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8420 }
8421 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8422 htab->tls_get_addr_fd->is_func_descriptor = 1;
8423 if (htab->tls_get_addr != NULL)
8424 {
8425 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8426 htab->tls_get_addr->is_func = 1;
8427 }
8428 }
8429 }
8430 }
8431 else if (htab->params->tls_get_addr_opt < 0)
8432 htab->params->tls_get_addr_opt = 0;
8433 }
8434 return _bfd_elf_tls_setup (info->output_bfd, info);
8435 }
8436
8437 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8438 HASH1 or HASH2. */
8439
8440 static bfd_boolean
8441 branch_reloc_hash_match (const bfd *ibfd,
8442 const Elf_Internal_Rela *rel,
8443 const struct ppc_link_hash_entry *hash1,
8444 const struct ppc_link_hash_entry *hash2)
8445 {
8446 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8447 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8448 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8449
8450 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8451 {
8452 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8453 struct elf_link_hash_entry *h;
8454
8455 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8456 h = elf_follow_link (h);
8457 if (h == &hash1->elf || h == &hash2->elf)
8458 return TRUE;
8459 }
8460 return FALSE;
8461 }
8462
8463 /* Run through all the TLS relocs looking for optimization
8464 opportunities. The linker has been hacked (see ppc64elf.em) to do
8465 a preliminary section layout so that we know the TLS segment
8466 offsets. We can't optimize earlier because some optimizations need
8467 to know the tp offset, and we need to optimize before allocating
8468 dynamic relocations. */
8469
8470 bfd_boolean
8471 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8472 {
8473 bfd *ibfd;
8474 asection *sec;
8475 struct ppc_link_hash_table *htab;
8476 unsigned char *toc_ref;
8477 int pass;
8478
8479 if (!bfd_link_executable (info))
8480 return TRUE;
8481
8482 htab = ppc_hash_table (info);
8483 if (htab == NULL)
8484 return FALSE;
8485
8486 /* Make two passes over the relocs. On the first pass, mark toc
8487 entries involved with tls relocs, and check that tls relocs
8488 involved in setting up a tls_get_addr call are indeed followed by
8489 such a call. If they are not, we can't do any tls optimization.
8490 On the second pass twiddle tls_mask flags to notify
8491 relocate_section that optimization can be done, and adjust got
8492 and plt refcounts. */
8493 toc_ref = NULL;
8494 for (pass = 0; pass < 2; ++pass)
8495 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8496 {
8497 Elf_Internal_Sym *locsyms = NULL;
8498 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8499
8500 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8501 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8502 {
8503 Elf_Internal_Rela *relstart, *rel, *relend;
8504 bfd_boolean found_tls_get_addr_arg = 0;
8505
8506 /* Read the relocations. */
8507 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8508 info->keep_memory);
8509 if (relstart == NULL)
8510 {
8511 free (toc_ref);
8512 return FALSE;
8513 }
8514
8515 relend = relstart + sec->reloc_count;
8516 for (rel = relstart; rel < relend; rel++)
8517 {
8518 enum elf_ppc64_reloc_type r_type;
8519 unsigned long r_symndx;
8520 struct elf_link_hash_entry *h;
8521 Elf_Internal_Sym *sym;
8522 asection *sym_sec;
8523 unsigned char *tls_mask;
8524 unsigned char tls_set, tls_clear, tls_type = 0;
8525 bfd_vma value;
8526 bfd_boolean ok_tprel, is_local;
8527 long toc_ref_index = 0;
8528 int expecting_tls_get_addr = 0;
8529 bfd_boolean ret = FALSE;
8530
8531 r_symndx = ELF64_R_SYM (rel->r_info);
8532 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8533 r_symndx, ibfd))
8534 {
8535 err_free_rel:
8536 if (elf_section_data (sec)->relocs != relstart)
8537 free (relstart);
8538 if (toc_ref != NULL)
8539 free (toc_ref);
8540 if (locsyms != NULL
8541 && (elf_symtab_hdr (ibfd).contents
8542 != (unsigned char *) locsyms))
8543 free (locsyms);
8544 return ret;
8545 }
8546
8547 if (h != NULL)
8548 {
8549 if (h->root.type == bfd_link_hash_defined
8550 || h->root.type == bfd_link_hash_defweak)
8551 value = h->root.u.def.value;
8552 else if (h->root.type == bfd_link_hash_undefweak)
8553 value = 0;
8554 else
8555 {
8556 found_tls_get_addr_arg = 0;
8557 continue;
8558 }
8559 }
8560 else
8561 /* Symbols referenced by TLS relocs must be of type
8562 STT_TLS. So no need for .opd local sym adjust. */
8563 value = sym->st_value;
8564
8565 ok_tprel = FALSE;
8566 is_local = FALSE;
8567 if (h == NULL
8568 || !h->def_dynamic)
8569 {
8570 is_local = TRUE;
8571 if (h != NULL
8572 && h->root.type == bfd_link_hash_undefweak)
8573 ok_tprel = TRUE;
8574 else if (sym_sec != NULL
8575 && sym_sec->output_section != NULL)
8576 {
8577 value += sym_sec->output_offset;
8578 value += sym_sec->output_section->vma;
8579 value -= htab->elf.tls_sec->vma;
8580 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8581 < (bfd_vma) 1 << 32);
8582 }
8583 }
8584
8585 r_type = ELF64_R_TYPE (rel->r_info);
8586 /* If this section has old-style __tls_get_addr calls
8587 without marker relocs, then check that each
8588 __tls_get_addr call reloc is preceded by a reloc
8589 that conceivably belongs to the __tls_get_addr arg
8590 setup insn. If we don't find matching arg setup
8591 relocs, don't do any tls optimization. */
8592 if (pass == 0
8593 && sec->has_tls_get_addr_call
8594 && h != NULL
8595 && (h == &htab->tls_get_addr->elf
8596 || h == &htab->tls_get_addr_fd->elf)
8597 && !found_tls_get_addr_arg
8598 && is_branch_reloc (r_type))
8599 {
8600 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8601 "TLS optimization disabled\n"),
8602 ibfd, sec, rel->r_offset);
8603 ret = TRUE;
8604 goto err_free_rel;
8605 }
8606
8607 found_tls_get_addr_arg = 0;
8608 switch (r_type)
8609 {
8610 case R_PPC64_GOT_TLSLD16:
8611 case R_PPC64_GOT_TLSLD16_LO:
8612 expecting_tls_get_addr = 1;
8613 found_tls_get_addr_arg = 1;
8614 /* Fall through. */
8615
8616 case R_PPC64_GOT_TLSLD16_HI:
8617 case R_PPC64_GOT_TLSLD16_HA:
8618 /* These relocs should never be against a symbol
8619 defined in a shared lib. Leave them alone if
8620 that turns out to be the case. */
8621 if (!is_local)
8622 continue;
8623
8624 /* LD -> LE */
8625 tls_set = 0;
8626 tls_clear = TLS_LD;
8627 tls_type = TLS_TLS | TLS_LD;
8628 break;
8629
8630 case R_PPC64_GOT_TLSGD16:
8631 case R_PPC64_GOT_TLSGD16_LO:
8632 expecting_tls_get_addr = 1;
8633 found_tls_get_addr_arg = 1;
8634 /* Fall through. */
8635
8636 case R_PPC64_GOT_TLSGD16_HI:
8637 case R_PPC64_GOT_TLSGD16_HA:
8638 if (ok_tprel)
8639 /* GD -> LE */
8640 tls_set = 0;
8641 else
8642 /* GD -> IE */
8643 tls_set = TLS_TLS | TLS_TPRELGD;
8644 tls_clear = TLS_GD;
8645 tls_type = TLS_TLS | TLS_GD;
8646 break;
8647
8648 case R_PPC64_GOT_TPREL16_DS:
8649 case R_PPC64_GOT_TPREL16_LO_DS:
8650 case R_PPC64_GOT_TPREL16_HI:
8651 case R_PPC64_GOT_TPREL16_HA:
8652 if (ok_tprel)
8653 {
8654 /* IE -> LE */
8655 tls_set = 0;
8656 tls_clear = TLS_TPREL;
8657 tls_type = TLS_TLS | TLS_TPREL;
8658 break;
8659 }
8660 continue;
8661
8662 case R_PPC64_TLSGD:
8663 case R_PPC64_TLSLD:
8664 found_tls_get_addr_arg = 1;
8665 /* Fall through. */
8666
8667 case R_PPC64_TLS:
8668 case R_PPC64_TOC16:
8669 case R_PPC64_TOC16_LO:
8670 if (sym_sec == NULL || sym_sec != toc)
8671 continue;
8672
8673 /* Mark this toc entry as referenced by a TLS
8674 code sequence. We can do that now in the
8675 case of R_PPC64_TLS, and after checking for
8676 tls_get_addr for the TOC16 relocs. */
8677 if (toc_ref == NULL)
8678 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8679 if (toc_ref == NULL)
8680 goto err_free_rel;
8681
8682 if (h != NULL)
8683 value = h->root.u.def.value;
8684 else
8685 value = sym->st_value;
8686 value += rel->r_addend;
8687 if (value % 8 != 0)
8688 continue;
8689 BFD_ASSERT (value < toc->size
8690 && toc->output_offset % 8 == 0);
8691 toc_ref_index = (value + toc->output_offset) / 8;
8692 if (r_type == R_PPC64_TLS
8693 || r_type == R_PPC64_TLSGD
8694 || r_type == R_PPC64_TLSLD)
8695 {
8696 toc_ref[toc_ref_index] = 1;
8697 continue;
8698 }
8699
8700 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8701 continue;
8702
8703 tls_set = 0;
8704 tls_clear = 0;
8705 expecting_tls_get_addr = 2;
8706 break;
8707
8708 case R_PPC64_TPREL64:
8709 if (pass == 0
8710 || sec != toc
8711 || toc_ref == NULL
8712 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8713 continue;
8714 if (ok_tprel)
8715 {
8716 /* IE -> LE */
8717 tls_set = TLS_EXPLICIT;
8718 tls_clear = TLS_TPREL;
8719 break;
8720 }
8721 continue;
8722
8723 case R_PPC64_DTPMOD64:
8724 if (pass == 0
8725 || sec != toc
8726 || toc_ref == NULL
8727 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8728 continue;
8729 if (rel + 1 < relend
8730 && (rel[1].r_info
8731 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8732 && rel[1].r_offset == rel->r_offset + 8)
8733 {
8734 if (ok_tprel)
8735 /* GD -> LE */
8736 tls_set = TLS_EXPLICIT | TLS_GD;
8737 else
8738 /* GD -> IE */
8739 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8740 tls_clear = TLS_GD;
8741 }
8742 else
8743 {
8744 if (!is_local)
8745 continue;
8746
8747 /* LD -> LE */
8748 tls_set = TLS_EXPLICIT;
8749 tls_clear = TLS_LD;
8750 }
8751 break;
8752
8753 default:
8754 continue;
8755 }
8756
8757 if (pass == 0)
8758 {
8759 if (!expecting_tls_get_addr
8760 || !sec->has_tls_get_addr_call)
8761 continue;
8762
8763 if (rel + 1 < relend
8764 && branch_reloc_hash_match (ibfd, rel + 1,
8765 htab->tls_get_addr,
8766 htab->tls_get_addr_fd))
8767 {
8768 if (expecting_tls_get_addr == 2)
8769 {
8770 /* Check for toc tls entries. */
8771 unsigned char *toc_tls;
8772 int retval;
8773
8774 retval = get_tls_mask (&toc_tls, NULL, NULL,
8775 &locsyms,
8776 rel, ibfd);
8777 if (retval == 0)
8778 goto err_free_rel;
8779 if (toc_tls != NULL)
8780 {
8781 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8782 found_tls_get_addr_arg = 1;
8783 if (retval > 1)
8784 toc_ref[toc_ref_index] = 1;
8785 }
8786 }
8787 continue;
8788 }
8789
8790 if (expecting_tls_get_addr != 1)
8791 continue;
8792
8793 /* Uh oh, we didn't find the expected call. We
8794 could just mark this symbol to exclude it
8795 from tls optimization but it's safer to skip
8796 the entire optimization. */
8797 /* xgettext:c-format */
8798 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8799 "TLS optimization disabled\n"),
8800 ibfd, sec, rel->r_offset);
8801 ret = TRUE;
8802 goto err_free_rel;
8803 }
8804
8805 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8806 {
8807 struct plt_entry *ent;
8808 for (ent = htab->tls_get_addr->elf.plt.plist;
8809 ent != NULL;
8810 ent = ent->next)
8811 if (ent->addend == 0)
8812 {
8813 if (ent->plt.refcount > 0)
8814 {
8815 ent->plt.refcount -= 1;
8816 expecting_tls_get_addr = 0;
8817 }
8818 break;
8819 }
8820 }
8821
8822 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8823 {
8824 struct plt_entry *ent;
8825 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8826 ent != NULL;
8827 ent = ent->next)
8828 if (ent->addend == 0)
8829 {
8830 if (ent->plt.refcount > 0)
8831 ent->plt.refcount -= 1;
8832 break;
8833 }
8834 }
8835
8836 if (tls_clear == 0)
8837 continue;
8838
8839 if ((tls_set & TLS_EXPLICIT) == 0)
8840 {
8841 struct got_entry *ent;
8842
8843 /* Adjust got entry for this reloc. */
8844 if (h != NULL)
8845 ent = h->got.glist;
8846 else
8847 ent = elf_local_got_ents (ibfd)[r_symndx];
8848
8849 for (; ent != NULL; ent = ent->next)
8850 if (ent->addend == rel->r_addend
8851 && ent->owner == ibfd
8852 && ent->tls_type == tls_type)
8853 break;
8854 if (ent == NULL)
8855 abort ();
8856
8857 if (tls_set == 0)
8858 {
8859 /* We managed to get rid of a got entry. */
8860 if (ent->got.refcount > 0)
8861 ent->got.refcount -= 1;
8862 }
8863 }
8864 else
8865 {
8866 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8867 we'll lose one or two dyn relocs. */
8868 if (!dec_dynrel_count (rel->r_info, sec, info,
8869 NULL, h, sym))
8870 return FALSE;
8871
8872 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8873 {
8874 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8875 NULL, h, sym))
8876 return FALSE;
8877 }
8878 }
8879
8880 *tls_mask |= tls_set;
8881 *tls_mask &= ~tls_clear;
8882 }
8883
8884 if (elf_section_data (sec)->relocs != relstart)
8885 free (relstart);
8886 }
8887
8888 if (locsyms != NULL
8889 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8890 {
8891 if (!info->keep_memory)
8892 free (locsyms);
8893 else
8894 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8895 }
8896 }
8897
8898 if (toc_ref != NULL)
8899 free (toc_ref);
8900 return TRUE;
8901 }
8902
8903 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8904 the values of any global symbols in a toc section that has been
8905 edited. Globals in toc sections should be a rarity, so this function
8906 sets a flag if any are found in toc sections other than the one just
8907 edited, so that futher hash table traversals can be avoided. */
8908
8909 struct adjust_toc_info
8910 {
8911 asection *toc;
8912 unsigned long *skip;
8913 bfd_boolean global_toc_syms;
8914 };
8915
8916 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8917
8918 static bfd_boolean
8919 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8920 {
8921 struct ppc_link_hash_entry *eh;
8922 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8923 unsigned long i;
8924
8925 if (h->root.type != bfd_link_hash_defined
8926 && h->root.type != bfd_link_hash_defweak)
8927 return TRUE;
8928
8929 eh = (struct ppc_link_hash_entry *) h;
8930 if (eh->adjust_done)
8931 return TRUE;
8932
8933 if (eh->elf.root.u.def.section == toc_inf->toc)
8934 {
8935 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8936 i = toc_inf->toc->rawsize >> 3;
8937 else
8938 i = eh->elf.root.u.def.value >> 3;
8939
8940 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8941 {
8942 _bfd_error_handler
8943 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8944 do
8945 ++i;
8946 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8947 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8948 }
8949
8950 eh->elf.root.u.def.value -= toc_inf->skip[i];
8951 eh->adjust_done = 1;
8952 }
8953 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8954 toc_inf->global_toc_syms = TRUE;
8955
8956 return TRUE;
8957 }
8958
8959 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8960 on a _LO variety toc/got reloc. */
8961
8962 static bfd_boolean
8963 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8964 {
8965 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8966 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8967 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8968 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8969 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8970 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8971 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8972 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8973 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8974 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8975 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8976 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8977 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8978 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8979 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8980 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8981 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8982 /* Exclude lfqu by testing reloc. If relocs are ever
8983 defined for the reduced D field in psq_lu then those
8984 will need testing too. */
8985 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8986 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8987 && (insn & 1) == 0)
8988 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8989 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8990 /* Exclude stfqu. psq_stu as above for psq_lu. */
8991 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8992 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8993 && (insn & 1) == 0));
8994 }
8995
8996 /* Examine all relocs referencing .toc sections in order to remove
8997 unused .toc entries. */
8998
8999 bfd_boolean
9000 ppc64_elf_edit_toc (struct bfd_link_info *info)
9001 {
9002 bfd *ibfd;
9003 struct adjust_toc_info toc_inf;
9004 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9005
9006 htab->do_toc_opt = 1;
9007 toc_inf.global_toc_syms = TRUE;
9008 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9009 {
9010 asection *toc, *sec;
9011 Elf_Internal_Shdr *symtab_hdr;
9012 Elf_Internal_Sym *local_syms;
9013 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
9014 unsigned long *skip, *drop;
9015 unsigned char *used;
9016 unsigned char *keep, last, some_unused;
9017
9018 if (!is_ppc64_elf (ibfd))
9019 continue;
9020
9021 toc = bfd_get_section_by_name (ibfd, ".toc");
9022 if (toc == NULL
9023 || toc->size == 0
9024 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
9025 || discarded_section (toc))
9026 continue;
9027
9028 toc_relocs = NULL;
9029 local_syms = NULL;
9030 symtab_hdr = &elf_symtab_hdr (ibfd);
9031
9032 /* Look at sections dropped from the final link. */
9033 skip = NULL;
9034 relstart = NULL;
9035 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9036 {
9037 if (sec->reloc_count == 0
9038 || !discarded_section (sec)
9039 || get_opd_info (sec)
9040 || (sec->flags & SEC_ALLOC) == 0
9041 || (sec->flags & SEC_DEBUGGING) != 0)
9042 continue;
9043
9044 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9045 if (relstart == NULL)
9046 goto error_ret;
9047
9048 /* Run through the relocs to see which toc entries might be
9049 unused. */
9050 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9051 {
9052 enum elf_ppc64_reloc_type r_type;
9053 unsigned long r_symndx;
9054 asection *sym_sec;
9055 struct elf_link_hash_entry *h;
9056 Elf_Internal_Sym *sym;
9057 bfd_vma val;
9058
9059 r_type = ELF64_R_TYPE (rel->r_info);
9060 switch (r_type)
9061 {
9062 default:
9063 continue;
9064
9065 case R_PPC64_TOC16:
9066 case R_PPC64_TOC16_LO:
9067 case R_PPC64_TOC16_HI:
9068 case R_PPC64_TOC16_HA:
9069 case R_PPC64_TOC16_DS:
9070 case R_PPC64_TOC16_LO_DS:
9071 break;
9072 }
9073
9074 r_symndx = ELF64_R_SYM (rel->r_info);
9075 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9076 r_symndx, ibfd))
9077 goto error_ret;
9078
9079 if (sym_sec != toc)
9080 continue;
9081
9082 if (h != NULL)
9083 val = h->root.u.def.value;
9084 else
9085 val = sym->st_value;
9086 val += rel->r_addend;
9087
9088 if (val >= toc->size)
9089 continue;
9090
9091 /* Anything in the toc ought to be aligned to 8 bytes.
9092 If not, don't mark as unused. */
9093 if (val & 7)
9094 continue;
9095
9096 if (skip == NULL)
9097 {
9098 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9099 if (skip == NULL)
9100 goto error_ret;
9101 }
9102
9103 skip[val >> 3] = ref_from_discarded;
9104 }
9105
9106 if (elf_section_data (sec)->relocs != relstart)
9107 free (relstart);
9108 }
9109
9110 /* For largetoc loads of address constants, we can convert
9111 . addis rx,2,addr@got@ha
9112 . ld ry,addr@got@l(rx)
9113 to
9114 . addis rx,2,addr@toc@ha
9115 . addi ry,rx,addr@toc@l
9116 when addr is within 2G of the toc pointer. This then means
9117 that the word storing "addr" in the toc is no longer needed. */
9118
9119 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9120 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9121 && toc->reloc_count != 0)
9122 {
9123 /* Read toc relocs. */
9124 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9125 info->keep_memory);
9126 if (toc_relocs == NULL)
9127 goto error_ret;
9128
9129 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9130 {
9131 enum elf_ppc64_reloc_type r_type;
9132 unsigned long r_symndx;
9133 asection *sym_sec;
9134 struct elf_link_hash_entry *h;
9135 Elf_Internal_Sym *sym;
9136 bfd_vma val, addr;
9137
9138 r_type = ELF64_R_TYPE (rel->r_info);
9139 if (r_type != R_PPC64_ADDR64)
9140 continue;
9141
9142 r_symndx = ELF64_R_SYM (rel->r_info);
9143 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9144 r_symndx, ibfd))
9145 goto error_ret;
9146
9147 if (sym_sec == NULL
9148 || sym_sec->output_section == NULL
9149 || discarded_section (sym_sec))
9150 continue;
9151
9152 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9153 continue;
9154
9155 if (h != NULL)
9156 {
9157 if (h->type == STT_GNU_IFUNC)
9158 continue;
9159 val = h->root.u.def.value;
9160 }
9161 else
9162 {
9163 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9164 continue;
9165 val = sym->st_value;
9166 }
9167 val += rel->r_addend;
9168 val += sym_sec->output_section->vma + sym_sec->output_offset;
9169
9170 /* We don't yet know the exact toc pointer value, but we
9171 know it will be somewhere in the toc section. Don't
9172 optimize if the difference from any possible toc
9173 pointer is outside [ff..f80008000, 7fff7fff]. */
9174 addr = toc->output_section->vma + TOC_BASE_OFF;
9175 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9176 continue;
9177
9178 addr = toc->output_section->vma + toc->output_section->rawsize;
9179 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9180 continue;
9181
9182 if (skip == NULL)
9183 {
9184 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9185 if (skip == NULL)
9186 goto error_ret;
9187 }
9188
9189 skip[rel->r_offset >> 3]
9190 |= can_optimize | ((rel - toc_relocs) << 2);
9191 }
9192 }
9193
9194 if (skip == NULL)
9195 continue;
9196
9197 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9198 if (used == NULL)
9199 {
9200 error_ret:
9201 if (local_syms != NULL
9202 && symtab_hdr->contents != (unsigned char *) local_syms)
9203 free (local_syms);
9204 if (sec != NULL
9205 && relstart != NULL
9206 && elf_section_data (sec)->relocs != relstart)
9207 free (relstart);
9208 if (toc_relocs != NULL
9209 && elf_section_data (toc)->relocs != toc_relocs)
9210 free (toc_relocs);
9211 if (skip != NULL)
9212 free (skip);
9213 return FALSE;
9214 }
9215
9216 /* Now check all kept sections that might reference the toc.
9217 Check the toc itself last. */
9218 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9219 : ibfd->sections);
9220 sec != NULL;
9221 sec = (sec == toc ? NULL
9222 : sec->next == NULL ? toc
9223 : sec->next == toc && toc->next ? toc->next
9224 : sec->next))
9225 {
9226 int repeat;
9227
9228 if (sec->reloc_count == 0
9229 || discarded_section (sec)
9230 || get_opd_info (sec)
9231 || (sec->flags & SEC_ALLOC) == 0
9232 || (sec->flags & SEC_DEBUGGING) != 0)
9233 continue;
9234
9235 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9236 info->keep_memory);
9237 if (relstart == NULL)
9238 {
9239 free (used);
9240 goto error_ret;
9241 }
9242
9243 /* Mark toc entries referenced as used. */
9244 do
9245 {
9246 repeat = 0;
9247 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9248 {
9249 enum elf_ppc64_reloc_type r_type;
9250 unsigned long r_symndx;
9251 asection *sym_sec;
9252 struct elf_link_hash_entry *h;
9253 Elf_Internal_Sym *sym;
9254 bfd_vma val;
9255 enum {no_check, check_lo, check_ha} insn_check;
9256
9257 r_type = ELF64_R_TYPE (rel->r_info);
9258 switch (r_type)
9259 {
9260 default:
9261 insn_check = no_check;
9262 break;
9263
9264 case R_PPC64_GOT_TLSLD16_HA:
9265 case R_PPC64_GOT_TLSGD16_HA:
9266 case R_PPC64_GOT_TPREL16_HA:
9267 case R_PPC64_GOT_DTPREL16_HA:
9268 case R_PPC64_GOT16_HA:
9269 case R_PPC64_TOC16_HA:
9270 insn_check = check_ha;
9271 break;
9272
9273 case R_PPC64_GOT_TLSLD16_LO:
9274 case R_PPC64_GOT_TLSGD16_LO:
9275 case R_PPC64_GOT_TPREL16_LO_DS:
9276 case R_PPC64_GOT_DTPREL16_LO_DS:
9277 case R_PPC64_GOT16_LO:
9278 case R_PPC64_GOT16_LO_DS:
9279 case R_PPC64_TOC16_LO:
9280 case R_PPC64_TOC16_LO_DS:
9281 insn_check = check_lo;
9282 break;
9283 }
9284
9285 if (insn_check != no_check)
9286 {
9287 bfd_vma off = rel->r_offset & ~3;
9288 unsigned char buf[4];
9289 unsigned int insn;
9290
9291 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9292 {
9293 free (used);
9294 goto error_ret;
9295 }
9296 insn = bfd_get_32 (ibfd, buf);
9297 if (insn_check == check_lo
9298 ? !ok_lo_toc_insn (insn, r_type)
9299 : ((insn & ((0x3f << 26) | 0x1f << 16))
9300 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9301 {
9302 char str[12];
9303
9304 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9305 sprintf (str, "%#08x", insn);
9306 info->callbacks->einfo
9307 /* xgettext:c-format */
9308 (_("%H: toc optimization is not supported for"
9309 " %s instruction.\n"),
9310 ibfd, sec, rel->r_offset & ~3, str);
9311 }
9312 }
9313
9314 switch (r_type)
9315 {
9316 case R_PPC64_TOC16:
9317 case R_PPC64_TOC16_LO:
9318 case R_PPC64_TOC16_HI:
9319 case R_PPC64_TOC16_HA:
9320 case R_PPC64_TOC16_DS:
9321 case R_PPC64_TOC16_LO_DS:
9322 /* In case we're taking addresses of toc entries. */
9323 case R_PPC64_ADDR64:
9324 break;
9325
9326 default:
9327 continue;
9328 }
9329
9330 r_symndx = ELF64_R_SYM (rel->r_info);
9331 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9332 r_symndx, ibfd))
9333 {
9334 free (used);
9335 goto error_ret;
9336 }
9337
9338 if (sym_sec != toc)
9339 continue;
9340
9341 if (h != NULL)
9342 val = h->root.u.def.value;
9343 else
9344 val = sym->st_value;
9345 val += rel->r_addend;
9346
9347 if (val >= toc->size)
9348 continue;
9349
9350 if ((skip[val >> 3] & can_optimize) != 0)
9351 {
9352 bfd_vma off;
9353 unsigned char opc;
9354
9355 switch (r_type)
9356 {
9357 case R_PPC64_TOC16_HA:
9358 break;
9359
9360 case R_PPC64_TOC16_LO_DS:
9361 off = rel->r_offset;
9362 off += (bfd_big_endian (ibfd) ? -2 : 3);
9363 if (!bfd_get_section_contents (ibfd, sec, &opc,
9364 off, 1))
9365 {
9366 free (used);
9367 goto error_ret;
9368 }
9369 if ((opc & (0x3f << 2)) == (58u << 2))
9370 break;
9371 /* Fall through. */
9372
9373 default:
9374 /* Wrong sort of reloc, or not a ld. We may
9375 as well clear ref_from_discarded too. */
9376 skip[val >> 3] = 0;
9377 }
9378 }
9379
9380 if (sec != toc)
9381 used[val >> 3] = 1;
9382 /* For the toc section, we only mark as used if this
9383 entry itself isn't unused. */
9384 else if ((used[rel->r_offset >> 3]
9385 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9386 && !used[val >> 3])
9387 {
9388 /* Do all the relocs again, to catch reference
9389 chains. */
9390 repeat = 1;
9391 used[val >> 3] = 1;
9392 }
9393 }
9394 }
9395 while (repeat);
9396
9397 if (elf_section_data (sec)->relocs != relstart)
9398 free (relstart);
9399 }
9400
9401 /* Merge the used and skip arrays. Assume that TOC
9402 doublewords not appearing as either used or unused belong
9403 to to an entry more than one doubleword in size. */
9404 for (drop = skip, keep = used, last = 0, some_unused = 0;
9405 drop < skip + (toc->size + 7) / 8;
9406 ++drop, ++keep)
9407 {
9408 if (*keep)
9409 {
9410 *drop &= ~ref_from_discarded;
9411 if ((*drop & can_optimize) != 0)
9412 some_unused = 1;
9413 last = 0;
9414 }
9415 else if ((*drop & ref_from_discarded) != 0)
9416 {
9417 some_unused = 1;
9418 last = ref_from_discarded;
9419 }
9420 else
9421 *drop = last;
9422 }
9423
9424 free (used);
9425
9426 if (some_unused)
9427 {
9428 bfd_byte *contents, *src;
9429 unsigned long off;
9430 Elf_Internal_Sym *sym;
9431 bfd_boolean local_toc_syms = FALSE;
9432
9433 /* Shuffle the toc contents, and at the same time convert the
9434 skip array from booleans into offsets. */
9435 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9436 goto error_ret;
9437
9438 elf_section_data (toc)->this_hdr.contents = contents;
9439
9440 for (src = contents, off = 0, drop = skip;
9441 src < contents + toc->size;
9442 src += 8, ++drop)
9443 {
9444 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9445 off += 8;
9446 else if (off != 0)
9447 {
9448 *drop = off;
9449 memcpy (src - off, src, 8);
9450 }
9451 }
9452 *drop = off;
9453 toc->rawsize = toc->size;
9454 toc->size = src - contents - off;
9455
9456 /* Adjust addends for relocs against the toc section sym,
9457 and optimize any accesses we can. */
9458 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9459 {
9460 if (sec->reloc_count == 0
9461 || discarded_section (sec))
9462 continue;
9463
9464 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9465 info->keep_memory);
9466 if (relstart == NULL)
9467 goto error_ret;
9468
9469 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9470 {
9471 enum elf_ppc64_reloc_type r_type;
9472 unsigned long r_symndx;
9473 asection *sym_sec;
9474 struct elf_link_hash_entry *h;
9475 bfd_vma val;
9476
9477 r_type = ELF64_R_TYPE (rel->r_info);
9478 switch (r_type)
9479 {
9480 default:
9481 continue;
9482
9483 case R_PPC64_TOC16:
9484 case R_PPC64_TOC16_LO:
9485 case R_PPC64_TOC16_HI:
9486 case R_PPC64_TOC16_HA:
9487 case R_PPC64_TOC16_DS:
9488 case R_PPC64_TOC16_LO_DS:
9489 case R_PPC64_ADDR64:
9490 break;
9491 }
9492
9493 r_symndx = ELF64_R_SYM (rel->r_info);
9494 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9495 r_symndx, ibfd))
9496 goto error_ret;
9497
9498 if (sym_sec != toc)
9499 continue;
9500
9501 if (h != NULL)
9502 val = h->root.u.def.value;
9503 else
9504 {
9505 val = sym->st_value;
9506 if (val != 0)
9507 local_toc_syms = TRUE;
9508 }
9509
9510 val += rel->r_addend;
9511
9512 if (val > toc->rawsize)
9513 val = toc->rawsize;
9514 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9515 continue;
9516 else if ((skip[val >> 3] & can_optimize) != 0)
9517 {
9518 Elf_Internal_Rela *tocrel
9519 = toc_relocs + (skip[val >> 3] >> 2);
9520 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9521
9522 switch (r_type)
9523 {
9524 case R_PPC64_TOC16_HA:
9525 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9526 break;
9527
9528 case R_PPC64_TOC16_LO_DS:
9529 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9530 break;
9531
9532 default:
9533 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9534 ppc_howto_init ();
9535 info->callbacks->einfo
9536 /* xgettext:c-format */
9537 (_("%H: %s references "
9538 "optimized away TOC entry\n"),
9539 ibfd, sec, rel->r_offset,
9540 ppc64_elf_howto_table[r_type]->name);
9541 bfd_set_error (bfd_error_bad_value);
9542 goto error_ret;
9543 }
9544 rel->r_addend = tocrel->r_addend;
9545 elf_section_data (sec)->relocs = relstart;
9546 continue;
9547 }
9548
9549 if (h != NULL || sym->st_value != 0)
9550 continue;
9551
9552 rel->r_addend -= skip[val >> 3];
9553 elf_section_data (sec)->relocs = relstart;
9554 }
9555
9556 if (elf_section_data (sec)->relocs != relstart)
9557 free (relstart);
9558 }
9559
9560 /* We shouldn't have local or global symbols defined in the TOC,
9561 but handle them anyway. */
9562 if (local_syms != NULL)
9563 for (sym = local_syms;
9564 sym < local_syms + symtab_hdr->sh_info;
9565 ++sym)
9566 if (sym->st_value != 0
9567 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9568 {
9569 unsigned long i;
9570
9571 if (sym->st_value > toc->rawsize)
9572 i = toc->rawsize >> 3;
9573 else
9574 i = sym->st_value >> 3;
9575
9576 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9577 {
9578 if (local_toc_syms)
9579 _bfd_error_handler
9580 (_("%s defined on removed toc entry"),
9581 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9582 do
9583 ++i;
9584 while ((skip[i] & (ref_from_discarded | can_optimize)));
9585 sym->st_value = (bfd_vma) i << 3;
9586 }
9587
9588 sym->st_value -= skip[i];
9589 symtab_hdr->contents = (unsigned char *) local_syms;
9590 }
9591
9592 /* Adjust any global syms defined in this toc input section. */
9593 if (toc_inf.global_toc_syms)
9594 {
9595 toc_inf.toc = toc;
9596 toc_inf.skip = skip;
9597 toc_inf.global_toc_syms = FALSE;
9598 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9599 &toc_inf);
9600 }
9601
9602 if (toc->reloc_count != 0)
9603 {
9604 Elf_Internal_Shdr *rel_hdr;
9605 Elf_Internal_Rela *wrel;
9606 bfd_size_type sz;
9607
9608 /* Remove unused toc relocs, and adjust those we keep. */
9609 if (toc_relocs == NULL)
9610 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9611 info->keep_memory);
9612 if (toc_relocs == NULL)
9613 goto error_ret;
9614
9615 wrel = toc_relocs;
9616 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9617 if ((skip[rel->r_offset >> 3]
9618 & (ref_from_discarded | can_optimize)) == 0)
9619 {
9620 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9621 wrel->r_info = rel->r_info;
9622 wrel->r_addend = rel->r_addend;
9623 ++wrel;
9624 }
9625 else if (!dec_dynrel_count (rel->r_info, toc, info,
9626 &local_syms, NULL, NULL))
9627 goto error_ret;
9628
9629 elf_section_data (toc)->relocs = toc_relocs;
9630 toc->reloc_count = wrel - toc_relocs;
9631 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9632 sz = rel_hdr->sh_entsize;
9633 rel_hdr->sh_size = toc->reloc_count * sz;
9634 }
9635 }
9636 else if (toc_relocs != NULL
9637 && elf_section_data (toc)->relocs != toc_relocs)
9638 free (toc_relocs);
9639
9640 if (local_syms != NULL
9641 && symtab_hdr->contents != (unsigned char *) local_syms)
9642 {
9643 if (!info->keep_memory)
9644 free (local_syms);
9645 else
9646 symtab_hdr->contents = (unsigned char *) local_syms;
9647 }
9648 free (skip);
9649 }
9650
9651 return TRUE;
9652 }
9653
9654 /* Return true iff input section I references the TOC using
9655 instructions limited to +/-32k offsets. */
9656
9657 bfd_boolean
9658 ppc64_elf_has_small_toc_reloc (asection *i)
9659 {
9660 return (is_ppc64_elf (i->owner)
9661 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9662 }
9663
9664 /* Allocate space for one GOT entry. */
9665
9666 static void
9667 allocate_got (struct elf_link_hash_entry *h,
9668 struct bfd_link_info *info,
9669 struct got_entry *gent)
9670 {
9671 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9672 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9673 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9674 ? 16 : 8);
9675 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9676 ? 2 : 1) * sizeof (Elf64_External_Rela);
9677 asection *got = ppc64_elf_tdata (gent->owner)->got;
9678
9679 gent->got.offset = got->size;
9680 got->size += entsize;
9681
9682 if (h->type == STT_GNU_IFUNC)
9683 {
9684 htab->elf.irelplt->size += rentsize;
9685 htab->got_reli_size += rentsize;
9686 }
9687 else if ((bfd_link_pic (info)
9688 || (htab->elf.dynamic_sections_created
9689 && h->dynindx != -1
9690 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9691 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9692 {
9693 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9694 relgot->size += rentsize;
9695 }
9696 }
9697
9698 /* This function merges got entries in the same toc group. */
9699
9700 static void
9701 merge_got_entries (struct got_entry **pent)
9702 {
9703 struct got_entry *ent, *ent2;
9704
9705 for (ent = *pent; ent != NULL; ent = ent->next)
9706 if (!ent->is_indirect)
9707 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9708 if (!ent2->is_indirect
9709 && ent2->addend == ent->addend
9710 && ent2->tls_type == ent->tls_type
9711 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9712 {
9713 ent2->is_indirect = TRUE;
9714 ent2->got.ent = ent;
9715 }
9716 }
9717
9718 /* If H is undefined weak, make it dynamic if that makes sense. */
9719
9720 static bfd_boolean
9721 ensure_undefweak_dynamic (struct bfd_link_info *info,
9722 struct elf_link_hash_entry *h)
9723 {
9724 struct elf_link_hash_table *htab = elf_hash_table (info);
9725
9726 if (htab->dynamic_sections_created
9727 && info->dynamic_undefined_weak != 0
9728 && h->root.type == bfd_link_hash_undefweak
9729 && h->dynindx == -1
9730 && !h->forced_local
9731 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9732 return bfd_elf_link_record_dynamic_symbol (info, h);
9733 return TRUE;
9734 }
9735
9736 /* Allocate space in .plt, .got and associated reloc sections for
9737 dynamic relocs. */
9738
9739 static bfd_boolean
9740 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9741 {
9742 struct bfd_link_info *info;
9743 struct ppc_link_hash_table *htab;
9744 asection *s;
9745 struct ppc_link_hash_entry *eh;
9746 struct got_entry **pgent, *gent;
9747
9748 if (h->root.type == bfd_link_hash_indirect)
9749 return TRUE;
9750
9751 info = (struct bfd_link_info *) inf;
9752 htab = ppc_hash_table (info);
9753 if (htab == NULL)
9754 return FALSE;
9755
9756 eh = (struct ppc_link_hash_entry *) h;
9757 /* Run through the TLS GD got entries first if we're changing them
9758 to TPREL. */
9759 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9760 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9761 if (gent->got.refcount > 0
9762 && (gent->tls_type & TLS_GD) != 0)
9763 {
9764 /* This was a GD entry that has been converted to TPREL. If
9765 there happens to be a TPREL entry we can use that one. */
9766 struct got_entry *ent;
9767 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9768 if (ent->got.refcount > 0
9769 && (ent->tls_type & TLS_TPREL) != 0
9770 && ent->addend == gent->addend
9771 && ent->owner == gent->owner)
9772 {
9773 gent->got.refcount = 0;
9774 break;
9775 }
9776
9777 /* If not, then we'll be using our own TPREL entry. */
9778 if (gent->got.refcount != 0)
9779 gent->tls_type = TLS_TLS | TLS_TPREL;
9780 }
9781
9782 /* Remove any list entry that won't generate a word in the GOT before
9783 we call merge_got_entries. Otherwise we risk merging to empty
9784 entries. */
9785 pgent = &h->got.glist;
9786 while ((gent = *pgent) != NULL)
9787 if (gent->got.refcount > 0)
9788 {
9789 if ((gent->tls_type & TLS_LD) != 0
9790 && !h->def_dynamic)
9791 {
9792 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9793 *pgent = gent->next;
9794 }
9795 else
9796 pgent = &gent->next;
9797 }
9798 else
9799 *pgent = gent->next;
9800
9801 if (!htab->do_multi_toc)
9802 merge_got_entries (&h->got.glist);
9803
9804 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9805 if (!gent->is_indirect)
9806 {
9807 /* Make sure this symbol is output as a dynamic symbol.
9808 Undefined weak syms won't yet be marked as dynamic. */
9809 if (!ensure_undefweak_dynamic (info, h))
9810 return FALSE;
9811
9812 if (!is_ppc64_elf (gent->owner))
9813 abort ();
9814
9815 allocate_got (h, info, gent);
9816 }
9817
9818 /* If no dynamic sections we can't have dynamic relocs, except for
9819 IFUNCs which are handled even in static executables. */
9820 if (!htab->elf.dynamic_sections_created
9821 && h->type != STT_GNU_IFUNC)
9822 eh->dyn_relocs = NULL;
9823
9824 /* Also discard relocs on undefined weak syms with non-default
9825 visibility, or when dynamic_undefined_weak says so. */
9826 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9827 eh->dyn_relocs = NULL;
9828
9829 if (eh->dyn_relocs != NULL)
9830 {
9831 struct elf_dyn_relocs *p, **pp;
9832
9833 /* In the shared -Bsymbolic case, discard space allocated for
9834 dynamic pc-relative relocs against symbols which turn out to
9835 be defined in regular objects. For the normal shared case,
9836 discard space for relocs that have become local due to symbol
9837 visibility changes. */
9838
9839 if (bfd_link_pic (info))
9840 {
9841 /* Relocs that use pc_count are those that appear on a call
9842 insn, or certain REL relocs (see must_be_dyn_reloc) that
9843 can be generated via assembly. We want calls to
9844 protected symbols to resolve directly to the function
9845 rather than going via the plt. If people want function
9846 pointer comparisons to work as expected then they should
9847 avoid writing weird assembly. */
9848 if (SYMBOL_CALLS_LOCAL (info, h))
9849 {
9850 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9851 {
9852 p->count -= p->pc_count;
9853 p->pc_count = 0;
9854 if (p->count == 0)
9855 *pp = p->next;
9856 else
9857 pp = &p->next;
9858 }
9859 }
9860
9861 if (eh->dyn_relocs != NULL)
9862 {
9863 /* Make sure this symbol is output as a dynamic symbol.
9864 Undefined weak syms won't yet be marked as dynamic. */
9865 if (!ensure_undefweak_dynamic (info, h))
9866 return FALSE;
9867 }
9868 }
9869 else if (h->type == STT_GNU_IFUNC)
9870 {
9871 /* A plt entry is always created when making direct calls to
9872 an ifunc, even when building a static executable, but
9873 that doesn't cover all cases. We may have only an ifunc
9874 initialised function pointer for a given ifunc symbol.
9875
9876 For ELFv2, dynamic relocations are not required when
9877 generating a global entry PLT stub. */
9878 if (abiversion (info->output_bfd) >= 2)
9879 {
9880 if (global_entry_stub (h))
9881 eh->dyn_relocs = NULL;
9882 }
9883
9884 /* For ELFv1 we have function descriptors. Descriptors need
9885 to be treated like PLT entries and thus have dynamic
9886 relocations. One exception is when the function
9887 descriptor is copied into .dynbss (which should only
9888 happen with ancient versions of gcc). */
9889 else if (h->needs_copy)
9890 eh->dyn_relocs = NULL;
9891 }
9892 else if (ELIMINATE_COPY_RELOCS)
9893 {
9894 /* For the non-pic case, discard space for relocs against
9895 symbols which turn out to need copy relocs or are not
9896 dynamic. */
9897 if (!h->non_got_ref
9898 && !h->def_regular)
9899 {
9900 /* Make sure this symbol is output as a dynamic symbol.
9901 Undefined weak syms won't yet be marked as dynamic. */
9902 if (!ensure_undefweak_dynamic (info, h))
9903 return FALSE;
9904
9905 if (h->dynindx == -1)
9906 eh->dyn_relocs = NULL;
9907 }
9908 else
9909 eh->dyn_relocs = NULL;
9910 }
9911
9912 /* Finally, allocate space. */
9913 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9914 {
9915 asection *sreloc = elf_section_data (p->sec)->sreloc;
9916 if (eh->elf.type == STT_GNU_IFUNC)
9917 sreloc = htab->elf.irelplt;
9918 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9919 }
9920 }
9921
9922 if ((htab->elf.dynamic_sections_created
9923 && h->dynindx != -1)
9924 || h->type == STT_GNU_IFUNC)
9925 {
9926 struct plt_entry *pent;
9927 bfd_boolean doneone = FALSE;
9928 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9929 if (pent->plt.refcount > 0)
9930 {
9931 if (!htab->elf.dynamic_sections_created
9932 || h->dynindx == -1)
9933 {
9934 s = htab->elf.iplt;
9935 pent->plt.offset = s->size;
9936 s->size += PLT_ENTRY_SIZE (htab);
9937 s = htab->elf.irelplt;
9938 }
9939 else
9940 {
9941 /* If this is the first .plt entry, make room for the special
9942 first entry. */
9943 s = htab->elf.splt;
9944 if (s->size == 0)
9945 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9946
9947 pent->plt.offset = s->size;
9948
9949 /* Make room for this entry. */
9950 s->size += PLT_ENTRY_SIZE (htab);
9951
9952 /* Make room for the .glink code. */
9953 s = htab->glink;
9954 if (s->size == 0)
9955 s->size += GLINK_CALL_STUB_SIZE;
9956 if (htab->opd_abi)
9957 {
9958 /* We need bigger stubs past index 32767. */
9959 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9960 s->size += 4;
9961 s->size += 2*4;
9962 }
9963 else
9964 s->size += 4;
9965
9966 /* We also need to make an entry in the .rela.plt section. */
9967 s = htab->elf.srelplt;
9968 }
9969 s->size += sizeof (Elf64_External_Rela);
9970 doneone = TRUE;
9971 }
9972 else
9973 pent->plt.offset = (bfd_vma) -1;
9974 if (!doneone)
9975 {
9976 h->plt.plist = NULL;
9977 h->needs_plt = 0;
9978 }
9979 }
9980 else
9981 {
9982 h->plt.plist = NULL;
9983 h->needs_plt = 0;
9984 }
9985
9986 return TRUE;
9987 }
9988
9989 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9990 to set up space for global entry stubs. These are put in glink,
9991 after the branch table. */
9992
9993 static bfd_boolean
9994 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9995 {
9996 struct bfd_link_info *info;
9997 struct ppc_link_hash_table *htab;
9998 struct plt_entry *pent;
9999 asection *s;
10000
10001 if (h->root.type == bfd_link_hash_indirect)
10002 return TRUE;
10003
10004 if (!h->pointer_equality_needed)
10005 return TRUE;
10006
10007 if (h->def_regular)
10008 return TRUE;
10009
10010 info = inf;
10011 htab = ppc_hash_table (info);
10012 if (htab == NULL)
10013 return FALSE;
10014
10015 s = htab->glink;
10016 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10017 if (pent->plt.offset != (bfd_vma) -1
10018 && pent->addend == 0)
10019 {
10020 /* For ELFv2, if this symbol is not defined in a regular file
10021 and we are not generating a shared library or pie, then we
10022 need to define the symbol in the executable on a call stub.
10023 This is to avoid text relocations. */
10024 s->size = (s->size + 15) & -16;
10025 h->root.type = bfd_link_hash_defined;
10026 h->root.u.def.section = s;
10027 h->root.u.def.value = s->size;
10028 s->size += 16;
10029 break;
10030 }
10031 return TRUE;
10032 }
10033
10034 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
10035 read-only sections. */
10036
10037 static bfd_boolean
10038 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
10039 {
10040 if (h->root.type == bfd_link_hash_indirect)
10041 return TRUE;
10042
10043 if (readonly_dynrelocs (h))
10044 {
10045 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
10046
10047 /* Not an error, just cut short the traversal. */
10048 return FALSE;
10049 }
10050 return TRUE;
10051 }
10052
10053 /* Set the sizes of the dynamic sections. */
10054
10055 static bfd_boolean
10056 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10057 struct bfd_link_info *info)
10058 {
10059 struct ppc_link_hash_table *htab;
10060 bfd *dynobj;
10061 asection *s;
10062 bfd_boolean relocs;
10063 bfd *ibfd;
10064 struct got_entry *first_tlsld;
10065
10066 htab = ppc_hash_table (info);
10067 if (htab == NULL)
10068 return FALSE;
10069
10070 dynobj = htab->elf.dynobj;
10071 if (dynobj == NULL)
10072 abort ();
10073
10074 if (htab->elf.dynamic_sections_created)
10075 {
10076 /* Set the contents of the .interp section to the interpreter. */
10077 if (bfd_link_executable (info) && !info->nointerp)
10078 {
10079 s = bfd_get_linker_section (dynobj, ".interp");
10080 if (s == NULL)
10081 abort ();
10082 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10083 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10084 }
10085 }
10086
10087 /* Set up .got offsets for local syms, and space for local dynamic
10088 relocs. */
10089 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10090 {
10091 struct got_entry **lgot_ents;
10092 struct got_entry **end_lgot_ents;
10093 struct plt_entry **local_plt;
10094 struct plt_entry **end_local_plt;
10095 unsigned char *lgot_masks;
10096 bfd_size_type locsymcount;
10097 Elf_Internal_Shdr *symtab_hdr;
10098
10099 if (!is_ppc64_elf (ibfd))
10100 continue;
10101
10102 for (s = ibfd->sections; s != NULL; s = s->next)
10103 {
10104 struct ppc_dyn_relocs *p;
10105
10106 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10107 {
10108 if (!bfd_is_abs_section (p->sec)
10109 && bfd_is_abs_section (p->sec->output_section))
10110 {
10111 /* Input section has been discarded, either because
10112 it is a copy of a linkonce section or due to
10113 linker script /DISCARD/, so we'll be discarding
10114 the relocs too. */
10115 }
10116 else if (p->count != 0)
10117 {
10118 asection *srel = elf_section_data (p->sec)->sreloc;
10119 if (p->ifunc)
10120 srel = htab->elf.irelplt;
10121 srel->size += p->count * sizeof (Elf64_External_Rela);
10122 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10123 info->flags |= DF_TEXTREL;
10124 }
10125 }
10126 }
10127
10128 lgot_ents = elf_local_got_ents (ibfd);
10129 if (!lgot_ents)
10130 continue;
10131
10132 symtab_hdr = &elf_symtab_hdr (ibfd);
10133 locsymcount = symtab_hdr->sh_info;
10134 end_lgot_ents = lgot_ents + locsymcount;
10135 local_plt = (struct plt_entry **) end_lgot_ents;
10136 end_local_plt = local_plt + locsymcount;
10137 lgot_masks = (unsigned char *) end_local_plt;
10138 s = ppc64_elf_tdata (ibfd)->got;
10139 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10140 {
10141 struct got_entry **pent, *ent;
10142
10143 pent = lgot_ents;
10144 while ((ent = *pent) != NULL)
10145 if (ent->got.refcount > 0)
10146 {
10147 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10148 {
10149 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10150 *pent = ent->next;
10151 }
10152 else
10153 {
10154 unsigned int ent_size = 8;
10155 unsigned int rel_size = sizeof (Elf64_External_Rela);
10156
10157 ent->got.offset = s->size;
10158 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10159 {
10160 ent_size *= 2;
10161 rel_size *= 2;
10162 }
10163 s->size += ent_size;
10164 if ((*lgot_masks & PLT_IFUNC) != 0)
10165 {
10166 htab->elf.irelplt->size += rel_size;
10167 htab->got_reli_size += rel_size;
10168 }
10169 else if (bfd_link_pic (info))
10170 {
10171 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10172 srel->size += rel_size;
10173 }
10174 pent = &ent->next;
10175 }
10176 }
10177 else
10178 *pent = ent->next;
10179 }
10180
10181 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10182 for (; local_plt < end_local_plt; ++local_plt)
10183 {
10184 struct plt_entry *ent;
10185
10186 for (ent = *local_plt; ent != NULL; ent = ent->next)
10187 if (ent->plt.refcount > 0)
10188 {
10189 s = htab->elf.iplt;
10190 ent->plt.offset = s->size;
10191 s->size += PLT_ENTRY_SIZE (htab);
10192
10193 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10194 }
10195 else
10196 ent->plt.offset = (bfd_vma) -1;
10197 }
10198 }
10199
10200 /* Allocate global sym .plt and .got entries, and space for global
10201 sym dynamic relocs. */
10202 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10203 /* Stash the end of glink branch table. */
10204 if (htab->glink != NULL)
10205 htab->glink->rawsize = htab->glink->size;
10206
10207 if (!htab->opd_abi && !bfd_link_pic (info))
10208 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10209
10210 first_tlsld = NULL;
10211 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10212 {
10213 struct got_entry *ent;
10214
10215 if (!is_ppc64_elf (ibfd))
10216 continue;
10217
10218 ent = ppc64_tlsld_got (ibfd);
10219 if (ent->got.refcount > 0)
10220 {
10221 if (!htab->do_multi_toc && first_tlsld != NULL)
10222 {
10223 ent->is_indirect = TRUE;
10224 ent->got.ent = first_tlsld;
10225 }
10226 else
10227 {
10228 if (first_tlsld == NULL)
10229 first_tlsld = ent;
10230 s = ppc64_elf_tdata (ibfd)->got;
10231 ent->got.offset = s->size;
10232 ent->owner = ibfd;
10233 s->size += 16;
10234 if (bfd_link_pic (info))
10235 {
10236 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10237 srel->size += sizeof (Elf64_External_Rela);
10238 }
10239 }
10240 }
10241 else
10242 ent->got.offset = (bfd_vma) -1;
10243 }
10244
10245 /* We now have determined the sizes of the various dynamic sections.
10246 Allocate memory for them. */
10247 relocs = FALSE;
10248 for (s = dynobj->sections; s != NULL; s = s->next)
10249 {
10250 if ((s->flags & SEC_LINKER_CREATED) == 0)
10251 continue;
10252
10253 if (s == htab->brlt || s == htab->relbrlt)
10254 /* These haven't been allocated yet; don't strip. */
10255 continue;
10256 else if (s == htab->elf.sgot
10257 || s == htab->elf.splt
10258 || s == htab->elf.iplt
10259 || s == htab->glink
10260 || s == htab->elf.sdynbss
10261 || s == htab->elf.sdynrelro)
10262 {
10263 /* Strip this section if we don't need it; see the
10264 comment below. */
10265 }
10266 else if (s == htab->glink_eh_frame)
10267 {
10268 if (!bfd_is_abs_section (s->output_section))
10269 /* Not sized yet. */
10270 continue;
10271 }
10272 else if (CONST_STRNEQ (s->name, ".rela"))
10273 {
10274 if (s->size != 0)
10275 {
10276 if (s != htab->elf.srelplt)
10277 relocs = TRUE;
10278
10279 /* We use the reloc_count field as a counter if we need
10280 to copy relocs into the output file. */
10281 s->reloc_count = 0;
10282 }
10283 }
10284 else
10285 {
10286 /* It's not one of our sections, so don't allocate space. */
10287 continue;
10288 }
10289
10290 if (s->size == 0)
10291 {
10292 /* If we don't need this section, strip it from the
10293 output file. This is mostly to handle .rela.bss and
10294 .rela.plt. We must create both sections in
10295 create_dynamic_sections, because they must be created
10296 before the linker maps input sections to output
10297 sections. The linker does that before
10298 adjust_dynamic_symbol is called, and it is that
10299 function which decides whether anything needs to go
10300 into these sections. */
10301 s->flags |= SEC_EXCLUDE;
10302 continue;
10303 }
10304
10305 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10306 continue;
10307
10308 /* Allocate memory for the section contents. We use bfd_zalloc
10309 here in case unused entries are not reclaimed before the
10310 section's contents are written out. This should not happen,
10311 but this way if it does we get a R_PPC64_NONE reloc in .rela
10312 sections instead of garbage.
10313 We also rely on the section contents being zero when writing
10314 the GOT and .dynrelro. */
10315 s->contents = bfd_zalloc (dynobj, s->size);
10316 if (s->contents == NULL)
10317 return FALSE;
10318 }
10319
10320 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10321 {
10322 if (!is_ppc64_elf (ibfd))
10323 continue;
10324
10325 s = ppc64_elf_tdata (ibfd)->got;
10326 if (s != NULL && s != htab->elf.sgot)
10327 {
10328 if (s->size == 0)
10329 s->flags |= SEC_EXCLUDE;
10330 else
10331 {
10332 s->contents = bfd_zalloc (ibfd, s->size);
10333 if (s->contents == NULL)
10334 return FALSE;
10335 }
10336 }
10337 s = ppc64_elf_tdata (ibfd)->relgot;
10338 if (s != NULL)
10339 {
10340 if (s->size == 0)
10341 s->flags |= SEC_EXCLUDE;
10342 else
10343 {
10344 s->contents = bfd_zalloc (ibfd, s->size);
10345 if (s->contents == NULL)
10346 return FALSE;
10347 relocs = TRUE;
10348 s->reloc_count = 0;
10349 }
10350 }
10351 }
10352
10353 if (htab->elf.dynamic_sections_created)
10354 {
10355 bfd_boolean tls_opt;
10356
10357 /* Add some entries to the .dynamic section. We fill in the
10358 values later, in ppc64_elf_finish_dynamic_sections, but we
10359 must add the entries now so that we get the correct size for
10360 the .dynamic section. The DT_DEBUG entry is filled in by the
10361 dynamic linker and used by the debugger. */
10362 #define add_dynamic_entry(TAG, VAL) \
10363 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10364
10365 if (bfd_link_executable (info))
10366 {
10367 if (!add_dynamic_entry (DT_DEBUG, 0))
10368 return FALSE;
10369 }
10370
10371 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10372 {
10373 if (!add_dynamic_entry (DT_PLTGOT, 0)
10374 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10375 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10376 || !add_dynamic_entry (DT_JMPREL, 0)
10377 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10378 return FALSE;
10379 }
10380
10381 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10382 {
10383 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10384 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10385 return FALSE;
10386 }
10387
10388 tls_opt = (htab->params->tls_get_addr_opt
10389 && htab->tls_get_addr_fd != NULL
10390 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10391 if (tls_opt || !htab->opd_abi)
10392 {
10393 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10394 return FALSE;
10395 }
10396
10397 if (relocs)
10398 {
10399 if (!add_dynamic_entry (DT_RELA, 0)
10400 || !add_dynamic_entry (DT_RELASZ, 0)
10401 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10402 return FALSE;
10403
10404 /* If any dynamic relocs apply to a read-only section,
10405 then we need a DT_TEXTREL entry. */
10406 if ((info->flags & DF_TEXTREL) == 0)
10407 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10408
10409 if ((info->flags & DF_TEXTREL) != 0)
10410 {
10411 if (!add_dynamic_entry (DT_TEXTREL, 0))
10412 return FALSE;
10413 }
10414 }
10415 }
10416 #undef add_dynamic_entry
10417
10418 return TRUE;
10419 }
10420
10421 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10422
10423 static bfd_boolean
10424 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10425 {
10426 if (h->plt.plist != NULL
10427 && !h->def_regular
10428 && !h->pointer_equality_needed)
10429 return FALSE;
10430
10431 return _bfd_elf_hash_symbol (h);
10432 }
10433
10434 /* Determine the type of stub needed, if any, for a call. */
10435
10436 static inline enum ppc_stub_type
10437 ppc_type_of_stub (asection *input_sec,
10438 const Elf_Internal_Rela *rel,
10439 struct ppc_link_hash_entry **hash,
10440 struct plt_entry **plt_ent,
10441 bfd_vma destination,
10442 unsigned long local_off)
10443 {
10444 struct ppc_link_hash_entry *h = *hash;
10445 bfd_vma location;
10446 bfd_vma branch_offset;
10447 bfd_vma max_branch_offset;
10448 enum elf_ppc64_reloc_type r_type;
10449
10450 if (h != NULL)
10451 {
10452 struct plt_entry *ent;
10453 struct ppc_link_hash_entry *fdh = h;
10454 if (h->oh != NULL
10455 && h->oh->is_func_descriptor)
10456 {
10457 fdh = ppc_follow_link (h->oh);
10458 *hash = fdh;
10459 }
10460
10461 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10462 if (ent->addend == rel->r_addend
10463 && ent->plt.offset != (bfd_vma) -1)
10464 {
10465 *plt_ent = ent;
10466 return ppc_stub_plt_call;
10467 }
10468
10469 /* Here, we know we don't have a plt entry. If we don't have a
10470 either a defined function descriptor or a defined entry symbol
10471 in a regular object file, then it is pointless trying to make
10472 any other type of stub. */
10473 if (!is_static_defined (&fdh->elf)
10474 && !is_static_defined (&h->elf))
10475 return ppc_stub_none;
10476 }
10477 else if (elf_local_got_ents (input_sec->owner) != NULL)
10478 {
10479 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10480 struct plt_entry **local_plt = (struct plt_entry **)
10481 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10482 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10483
10484 if (local_plt[r_symndx] != NULL)
10485 {
10486 struct plt_entry *ent;
10487
10488 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10489 if (ent->addend == rel->r_addend
10490 && ent->plt.offset != (bfd_vma) -1)
10491 {
10492 *plt_ent = ent;
10493 return ppc_stub_plt_call;
10494 }
10495 }
10496 }
10497
10498 /* Determine where the call point is. */
10499 location = (input_sec->output_offset
10500 + input_sec->output_section->vma
10501 + rel->r_offset);
10502
10503 branch_offset = destination - location;
10504 r_type = ELF64_R_TYPE (rel->r_info);
10505
10506 /* Determine if a long branch stub is needed. */
10507 max_branch_offset = 1 << 25;
10508 if (r_type != R_PPC64_REL24)
10509 max_branch_offset = 1 << 15;
10510
10511 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10512 /* We need a stub. Figure out whether a long_branch or plt_branch
10513 is needed later. */
10514 return ppc_stub_long_branch;
10515
10516 return ppc_stub_none;
10517 }
10518
10519 /* With power7 weakly ordered memory model, it is possible for ld.so
10520 to update a plt entry in one thread and have another thread see a
10521 stale zero toc entry. To avoid this we need some sort of acquire
10522 barrier in the call stub. One solution is to make the load of the
10523 toc word seem to appear to depend on the load of the function entry
10524 word. Another solution is to test for r2 being zero, and branch to
10525 the appropriate glink entry if so.
10526
10527 . fake dep barrier compare
10528 . ld 12,xxx(2) ld 12,xxx(2)
10529 . mtctr 12 mtctr 12
10530 . xor 11,12,12 ld 2,xxx+8(2)
10531 . add 2,2,11 cmpldi 2,0
10532 . ld 2,xxx+8(2) bnectr+
10533 . bctr b <glink_entry>
10534
10535 The solution involving the compare turns out to be faster, so
10536 that's what we use unless the branch won't reach. */
10537
10538 #define ALWAYS_USE_FAKE_DEP 0
10539 #define ALWAYS_EMIT_R2SAVE 0
10540
10541 #define PPC_LO(v) ((v) & 0xffff)
10542 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10543 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10544
10545 static inline unsigned int
10546 plt_stub_size (struct ppc_link_hash_table *htab,
10547 struct ppc_stub_hash_entry *stub_entry,
10548 bfd_vma off)
10549 {
10550 unsigned size = 12;
10551
10552 if (ALWAYS_EMIT_R2SAVE
10553 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10554 size += 4;
10555 if (PPC_HA (off) != 0)
10556 size += 4;
10557 if (htab->opd_abi)
10558 {
10559 size += 4;
10560 if (htab->params->plt_static_chain)
10561 size += 4;
10562 if (htab->params->plt_thread_safe
10563 && htab->elf.dynamic_sections_created
10564 && stub_entry->h != NULL
10565 && stub_entry->h->elf.dynindx != -1)
10566 size += 8;
10567 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10568 size += 4;
10569 }
10570 if (stub_entry->h != NULL
10571 && (stub_entry->h == htab->tls_get_addr_fd
10572 || stub_entry->h == htab->tls_get_addr)
10573 && htab->params->tls_get_addr_opt)
10574 {
10575 size += 7 * 4;
10576 if (ALWAYS_EMIT_R2SAVE
10577 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10578 size += 6 * 4;
10579 }
10580 return size;
10581 }
10582
10583 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10584 then return the padding needed to do so. */
10585 static inline unsigned int
10586 plt_stub_pad (struct ppc_link_hash_table *htab,
10587 struct ppc_stub_hash_entry *stub_entry,
10588 bfd_vma plt_off)
10589 {
10590 int stub_align = 1 << htab->params->plt_stub_align;
10591 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10592 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10593
10594 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10595 > ((stub_size - 1) & -stub_align))
10596 return stub_align - (stub_off & (stub_align - 1));
10597 return 0;
10598 }
10599
10600 /* Build a .plt call stub. */
10601
10602 static inline bfd_byte *
10603 build_plt_stub (struct ppc_link_hash_table *htab,
10604 struct ppc_stub_hash_entry *stub_entry,
10605 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10606 {
10607 bfd *obfd = htab->params->stub_bfd;
10608 bfd_boolean plt_load_toc = htab->opd_abi;
10609 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10610 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10611 && htab->elf.dynamic_sections_created
10612 && stub_entry->h != NULL
10613 && stub_entry->h->elf.dynindx != -1);
10614 bfd_boolean use_fake_dep = plt_thread_safe;
10615 bfd_vma cmp_branch_off = 0;
10616
10617 if (!ALWAYS_USE_FAKE_DEP
10618 && plt_load_toc
10619 && plt_thread_safe
10620 && !((stub_entry->h == htab->tls_get_addr_fd
10621 || stub_entry->h == htab->tls_get_addr)
10622 && htab->params->tls_get_addr_opt))
10623 {
10624 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10625 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10626 / PLT_ENTRY_SIZE (htab));
10627 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10628 bfd_vma to, from;
10629
10630 if (pltindex > 32768)
10631 glinkoff += (pltindex - 32768) * 4;
10632 to = (glinkoff
10633 + htab->glink->output_offset
10634 + htab->glink->output_section->vma);
10635 from = (p - stub_entry->group->stub_sec->contents
10636 + 4 * (ALWAYS_EMIT_R2SAVE
10637 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10638 + 4 * (PPC_HA (offset) != 0)
10639 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10640 != PPC_HA (offset))
10641 + 4 * (plt_static_chain != 0)
10642 + 20
10643 + stub_entry->group->stub_sec->output_offset
10644 + stub_entry->group->stub_sec->output_section->vma);
10645 cmp_branch_off = to - from;
10646 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10647 }
10648
10649 if (PPC_HA (offset) != 0)
10650 {
10651 if (r != NULL)
10652 {
10653 if (ALWAYS_EMIT_R2SAVE
10654 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10655 r[0].r_offset += 4;
10656 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10657 r[1].r_offset = r[0].r_offset + 4;
10658 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10659 r[1].r_addend = r[0].r_addend;
10660 if (plt_load_toc)
10661 {
10662 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10663 {
10664 r[2].r_offset = r[1].r_offset + 4;
10665 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10666 r[2].r_addend = r[0].r_addend;
10667 }
10668 else
10669 {
10670 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10671 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10672 r[2].r_addend = r[0].r_addend + 8;
10673 if (plt_static_chain)
10674 {
10675 r[3].r_offset = r[2].r_offset + 4;
10676 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10677 r[3].r_addend = r[0].r_addend + 16;
10678 }
10679 }
10680 }
10681 }
10682 if (ALWAYS_EMIT_R2SAVE
10683 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10684 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10685 if (plt_load_toc)
10686 {
10687 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10688 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10689 }
10690 else
10691 {
10692 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10693 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10694 }
10695 if (plt_load_toc
10696 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10697 {
10698 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10699 offset = 0;
10700 }
10701 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10702 if (plt_load_toc)
10703 {
10704 if (use_fake_dep)
10705 {
10706 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10707 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10708 }
10709 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10710 if (plt_static_chain)
10711 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10712 }
10713 }
10714 else
10715 {
10716 if (r != NULL)
10717 {
10718 if (ALWAYS_EMIT_R2SAVE
10719 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10720 r[0].r_offset += 4;
10721 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10722 if (plt_load_toc)
10723 {
10724 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10725 {
10726 r[1].r_offset = r[0].r_offset + 4;
10727 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10728 r[1].r_addend = r[0].r_addend;
10729 }
10730 else
10731 {
10732 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10733 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10734 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10735 if (plt_static_chain)
10736 {
10737 r[2].r_offset = r[1].r_offset + 4;
10738 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10739 r[2].r_addend = r[0].r_addend + 8;
10740 }
10741 }
10742 }
10743 }
10744 if (ALWAYS_EMIT_R2SAVE
10745 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10746 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10747 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10748 if (plt_load_toc
10749 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10750 {
10751 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10752 offset = 0;
10753 }
10754 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10755 if (plt_load_toc)
10756 {
10757 if (use_fake_dep)
10758 {
10759 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10760 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10761 }
10762 if (plt_static_chain)
10763 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10764 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10765 }
10766 }
10767 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10768 {
10769 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10770 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10771 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10772 }
10773 else
10774 bfd_put_32 (obfd, BCTR, p), p += 4;
10775 return p;
10776 }
10777
10778 /* Build a special .plt call stub for __tls_get_addr. */
10779
10780 #define LD_R11_0R3 0xe9630000
10781 #define LD_R12_0R3 0xe9830000
10782 #define MR_R0_R3 0x7c601b78
10783 #define CMPDI_R11_0 0x2c2b0000
10784 #define ADD_R3_R12_R13 0x7c6c6a14
10785 #define BEQLR 0x4d820020
10786 #define MR_R3_R0 0x7c030378
10787 #define STD_R11_0R1 0xf9610000
10788 #define BCTRL 0x4e800421
10789 #define LD_R11_0R1 0xe9610000
10790 #define MTLR_R11 0x7d6803a6
10791
10792 static inline bfd_byte *
10793 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10794 struct ppc_stub_hash_entry *stub_entry,
10795 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10796 {
10797 bfd *obfd = htab->params->stub_bfd;
10798
10799 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10800 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10801 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10802 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10803 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10804 bfd_put_32 (obfd, BEQLR, p), p += 4;
10805 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10806 if (r != NULL)
10807 r[0].r_offset += 7 * 4;
10808 if (!ALWAYS_EMIT_R2SAVE
10809 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10810 return build_plt_stub (htab, stub_entry, p, offset, r);
10811
10812 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10813 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10814
10815 if (r != NULL)
10816 r[0].r_offset += 2 * 4;
10817 p = build_plt_stub (htab, stub_entry, p, offset, r);
10818 bfd_put_32 (obfd, BCTRL, p - 4);
10819
10820 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10821 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10822 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10823 bfd_put_32 (obfd, BLR, p), p += 4;
10824
10825 return p;
10826 }
10827
10828 static Elf_Internal_Rela *
10829 get_relocs (asection *sec, int count)
10830 {
10831 Elf_Internal_Rela *relocs;
10832 struct bfd_elf_section_data *elfsec_data;
10833
10834 elfsec_data = elf_section_data (sec);
10835 relocs = elfsec_data->relocs;
10836 if (relocs == NULL)
10837 {
10838 bfd_size_type relsize;
10839 relsize = sec->reloc_count * sizeof (*relocs);
10840 relocs = bfd_alloc (sec->owner, relsize);
10841 if (relocs == NULL)
10842 return NULL;
10843 elfsec_data->relocs = relocs;
10844 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10845 sizeof (Elf_Internal_Shdr));
10846 if (elfsec_data->rela.hdr == NULL)
10847 return NULL;
10848 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10849 * sizeof (Elf64_External_Rela));
10850 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10851 sec->reloc_count = 0;
10852 }
10853 relocs += sec->reloc_count;
10854 sec->reloc_count += count;
10855 return relocs;
10856 }
10857
10858 static bfd_vma
10859 get_r2off (struct bfd_link_info *info,
10860 struct ppc_stub_hash_entry *stub_entry)
10861 {
10862 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10863 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10864
10865 if (r2off == 0)
10866 {
10867 /* Support linking -R objects. Get the toc pointer from the
10868 opd entry. */
10869 char buf[8];
10870 if (!htab->opd_abi)
10871 return r2off;
10872 asection *opd = stub_entry->h->elf.root.u.def.section;
10873 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10874
10875 if (strcmp (opd->name, ".opd") != 0
10876 || opd->reloc_count != 0)
10877 {
10878 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10879 stub_entry->h->elf.root.root.string);
10880 bfd_set_error (bfd_error_bad_value);
10881 return (bfd_vma) -1;
10882 }
10883 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10884 return (bfd_vma) -1;
10885 r2off = bfd_get_64 (opd->owner, buf);
10886 r2off -= elf_gp (info->output_bfd);
10887 }
10888 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10889 return r2off;
10890 }
10891
10892 static bfd_boolean
10893 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10894 {
10895 struct ppc_stub_hash_entry *stub_entry;
10896 struct ppc_branch_hash_entry *br_entry;
10897 struct bfd_link_info *info;
10898 struct ppc_link_hash_table *htab;
10899 bfd_byte *loc;
10900 bfd_byte *p;
10901 bfd_vma dest, off;
10902 int size;
10903 Elf_Internal_Rela *r;
10904 asection *plt;
10905
10906 /* Massage our args to the form they really have. */
10907 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10908 info = in_arg;
10909
10910 htab = ppc_hash_table (info);
10911 if (htab == NULL)
10912 return FALSE;
10913
10914 /* Make a note of the offset within the stubs for this entry. */
10915 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10916 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10917
10918 htab->stub_count[stub_entry->stub_type - 1] += 1;
10919 switch (stub_entry->stub_type)
10920 {
10921 case ppc_stub_long_branch:
10922 case ppc_stub_long_branch_r2off:
10923 /* Branches are relative. This is where we are going to. */
10924 dest = (stub_entry->target_value
10925 + stub_entry->target_section->output_offset
10926 + stub_entry->target_section->output_section->vma);
10927 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10928 off = dest;
10929
10930 /* And this is where we are coming from. */
10931 off -= (stub_entry->stub_offset
10932 + stub_entry->group->stub_sec->output_offset
10933 + stub_entry->group->stub_sec->output_section->vma);
10934
10935 size = 4;
10936 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10937 {
10938 bfd_vma r2off = get_r2off (info, stub_entry);
10939
10940 if (r2off == (bfd_vma) -1)
10941 {
10942 htab->stub_error = TRUE;
10943 return FALSE;
10944 }
10945 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10946 loc += 4;
10947 size = 8;
10948 if (PPC_HA (r2off) != 0)
10949 {
10950 bfd_put_32 (htab->params->stub_bfd,
10951 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10952 loc += 4;
10953 size += 4;
10954 }
10955 if (PPC_LO (r2off) != 0)
10956 {
10957 bfd_put_32 (htab->params->stub_bfd,
10958 ADDI_R2_R2 | PPC_LO (r2off), loc);
10959 loc += 4;
10960 size += 4;
10961 }
10962 off -= size - 4;
10963 }
10964 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10965
10966 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10967 {
10968 info->callbacks->einfo
10969 (_("%P: long branch stub `%s' offset overflow\n"),
10970 stub_entry->root.string);
10971 htab->stub_error = TRUE;
10972 return FALSE;
10973 }
10974
10975 if (info->emitrelocations)
10976 {
10977 r = get_relocs (stub_entry->group->stub_sec, 1);
10978 if (r == NULL)
10979 return FALSE;
10980 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10981 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10982 r->r_addend = dest;
10983 if (stub_entry->h != NULL)
10984 {
10985 struct elf_link_hash_entry **hashes;
10986 unsigned long symndx;
10987 struct ppc_link_hash_entry *h;
10988
10989 hashes = elf_sym_hashes (htab->params->stub_bfd);
10990 if (hashes == NULL)
10991 {
10992 bfd_size_type hsize;
10993
10994 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10995 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10996 if (hashes == NULL)
10997 return FALSE;
10998 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10999 htab->stub_globals = 1;
11000 }
11001 symndx = htab->stub_globals++;
11002 h = stub_entry->h;
11003 hashes[symndx] = &h->elf;
11004 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
11005 if (h->oh != NULL && h->oh->is_func)
11006 h = ppc_follow_link (h->oh);
11007 if (h->elf.root.u.def.section != stub_entry->target_section)
11008 /* H is an opd symbol. The addend must be zero. */
11009 r->r_addend = 0;
11010 else
11011 {
11012 off = (h->elf.root.u.def.value
11013 + h->elf.root.u.def.section->output_offset
11014 + h->elf.root.u.def.section->output_section->vma);
11015 r->r_addend -= off;
11016 }
11017 }
11018 }
11019 break;
11020
11021 case ppc_stub_plt_branch:
11022 case ppc_stub_plt_branch_r2off:
11023 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11024 stub_entry->root.string + 9,
11025 FALSE, FALSE);
11026 if (br_entry == NULL)
11027 {
11028 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
11029 stub_entry->root.string);
11030 htab->stub_error = TRUE;
11031 return FALSE;
11032 }
11033
11034 dest = (stub_entry->target_value
11035 + stub_entry->target_section->output_offset
11036 + stub_entry->target_section->output_section->vma);
11037 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11038 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11039
11040 bfd_put_64 (htab->brlt->owner, dest,
11041 htab->brlt->contents + br_entry->offset);
11042
11043 if (br_entry->iter == htab->stub_iteration)
11044 {
11045 br_entry->iter = 0;
11046
11047 if (htab->relbrlt != NULL)
11048 {
11049 /* Create a reloc for the branch lookup table entry. */
11050 Elf_Internal_Rela rela;
11051 bfd_byte *rl;
11052
11053 rela.r_offset = (br_entry->offset
11054 + htab->brlt->output_offset
11055 + htab->brlt->output_section->vma);
11056 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11057 rela.r_addend = dest;
11058
11059 rl = htab->relbrlt->contents;
11060 rl += (htab->relbrlt->reloc_count++
11061 * sizeof (Elf64_External_Rela));
11062 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11063 }
11064 else if (info->emitrelocations)
11065 {
11066 r = get_relocs (htab->brlt, 1);
11067 if (r == NULL)
11068 return FALSE;
11069 /* brlt, being SEC_LINKER_CREATED does not go through the
11070 normal reloc processing. Symbols and offsets are not
11071 translated from input file to output file form, so
11072 set up the offset per the output file. */
11073 r->r_offset = (br_entry->offset
11074 + htab->brlt->output_offset
11075 + htab->brlt->output_section->vma);
11076 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11077 r->r_addend = dest;
11078 }
11079 }
11080
11081 dest = (br_entry->offset
11082 + htab->brlt->output_offset
11083 + htab->brlt->output_section->vma);
11084
11085 off = (dest
11086 - elf_gp (htab->brlt->output_section->owner)
11087 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11088
11089 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11090 {
11091 info->callbacks->einfo
11092 (_("%P: linkage table error against `%T'\n"),
11093 stub_entry->root.string);
11094 bfd_set_error (bfd_error_bad_value);
11095 htab->stub_error = TRUE;
11096 return FALSE;
11097 }
11098
11099 if (info->emitrelocations)
11100 {
11101 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11102 if (r == NULL)
11103 return FALSE;
11104 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11105 if (bfd_big_endian (info->output_bfd))
11106 r[0].r_offset += 2;
11107 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11108 r[0].r_offset += 4;
11109 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11110 r[0].r_addend = dest;
11111 if (PPC_HA (off) != 0)
11112 {
11113 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11114 r[1].r_offset = r[0].r_offset + 4;
11115 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11116 r[1].r_addend = r[0].r_addend;
11117 }
11118 }
11119
11120 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11121 {
11122 if (PPC_HA (off) != 0)
11123 {
11124 size = 16;
11125 bfd_put_32 (htab->params->stub_bfd,
11126 ADDIS_R12_R2 | PPC_HA (off), loc);
11127 loc += 4;
11128 bfd_put_32 (htab->params->stub_bfd,
11129 LD_R12_0R12 | PPC_LO (off), loc);
11130 }
11131 else
11132 {
11133 size = 12;
11134 bfd_put_32 (htab->params->stub_bfd,
11135 LD_R12_0R2 | PPC_LO (off), loc);
11136 }
11137 }
11138 else
11139 {
11140 bfd_vma r2off = get_r2off (info, stub_entry);
11141
11142 if (r2off == (bfd_vma) -1)
11143 {
11144 htab->stub_error = TRUE;
11145 return FALSE;
11146 }
11147
11148 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11149 loc += 4;
11150 size = 16;
11151 if (PPC_HA (off) != 0)
11152 {
11153 size += 4;
11154 bfd_put_32 (htab->params->stub_bfd,
11155 ADDIS_R12_R2 | PPC_HA (off), loc);
11156 loc += 4;
11157 bfd_put_32 (htab->params->stub_bfd,
11158 LD_R12_0R12 | PPC_LO (off), loc);
11159 }
11160 else
11161 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11162
11163 if (PPC_HA (r2off) != 0)
11164 {
11165 size += 4;
11166 loc += 4;
11167 bfd_put_32 (htab->params->stub_bfd,
11168 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11169 }
11170 if (PPC_LO (r2off) != 0)
11171 {
11172 size += 4;
11173 loc += 4;
11174 bfd_put_32 (htab->params->stub_bfd,
11175 ADDI_R2_R2 | PPC_LO (r2off), loc);
11176 }
11177 }
11178 loc += 4;
11179 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11180 loc += 4;
11181 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11182 break;
11183
11184 case ppc_stub_plt_call:
11185 case ppc_stub_plt_call_r2save:
11186 if (stub_entry->h != NULL
11187 && stub_entry->h->is_func_descriptor
11188 && stub_entry->h->oh != NULL)
11189 {
11190 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11191
11192 /* If the old-ABI "dot-symbol" is undefined make it weak so
11193 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11194 if (fh->elf.root.type == bfd_link_hash_undefined
11195 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11196 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11197 fh->elf.root.type = bfd_link_hash_undefweak;
11198 }
11199
11200 /* Now build the stub. */
11201 dest = stub_entry->plt_ent->plt.offset & ~1;
11202 if (dest >= (bfd_vma) -2)
11203 abort ();
11204
11205 plt = htab->elf.splt;
11206 if (!htab->elf.dynamic_sections_created
11207 || stub_entry->h == NULL
11208 || stub_entry->h->elf.dynindx == -1)
11209 plt = htab->elf.iplt;
11210
11211 dest += plt->output_offset + plt->output_section->vma;
11212
11213 if (stub_entry->h == NULL
11214 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11215 {
11216 Elf_Internal_Rela rela;
11217 bfd_byte *rl;
11218
11219 rela.r_offset = dest;
11220 if (htab->opd_abi)
11221 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11222 else
11223 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11224 rela.r_addend = (stub_entry->target_value
11225 + stub_entry->target_section->output_offset
11226 + stub_entry->target_section->output_section->vma);
11227
11228 rl = (htab->elf.irelplt->contents
11229 + (htab->elf.irelplt->reloc_count++
11230 * sizeof (Elf64_External_Rela)));
11231 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11232 stub_entry->plt_ent->plt.offset |= 1;
11233 htab->local_ifunc_resolver = 1;
11234 }
11235
11236 off = (dest
11237 - elf_gp (plt->output_section->owner)
11238 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11239
11240 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11241 {
11242 info->callbacks->einfo
11243 /* xgettext:c-format */
11244 (_("%P: linkage table error against `%T'\n"),
11245 stub_entry->h != NULL
11246 ? stub_entry->h->elf.root.root.string
11247 : "<local sym>");
11248 bfd_set_error (bfd_error_bad_value);
11249 htab->stub_error = TRUE;
11250 return FALSE;
11251 }
11252
11253 if (htab->params->plt_stub_align != 0)
11254 {
11255 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11256
11257 stub_entry->group->stub_sec->size += pad;
11258 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11259 loc += pad;
11260 }
11261
11262 r = NULL;
11263 if (info->emitrelocations)
11264 {
11265 r = get_relocs (stub_entry->group->stub_sec,
11266 ((PPC_HA (off) != 0)
11267 + (htab->opd_abi
11268 ? 2 + (htab->params->plt_static_chain
11269 && PPC_HA (off + 16) == PPC_HA (off))
11270 : 1)));
11271 if (r == NULL)
11272 return FALSE;
11273 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11274 if (bfd_big_endian (info->output_bfd))
11275 r[0].r_offset += 2;
11276 r[0].r_addend = dest;
11277 }
11278 if (stub_entry->h != NULL
11279 && (stub_entry->h == htab->tls_get_addr_fd
11280 || stub_entry->h == htab->tls_get_addr)
11281 && htab->params->tls_get_addr_opt)
11282 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11283 else
11284 p = build_plt_stub (htab, stub_entry, loc, off, r);
11285 size = p - loc;
11286 break;
11287
11288 case ppc_stub_save_res:
11289 return TRUE;
11290
11291 default:
11292 BFD_FAIL ();
11293 return FALSE;
11294 }
11295
11296 stub_entry->group->stub_sec->size += size;
11297
11298 if (htab->params->emit_stub_syms)
11299 {
11300 struct elf_link_hash_entry *h;
11301 size_t len1, len2;
11302 char *name;
11303 const char *const stub_str[] = { "long_branch",
11304 "long_branch_r2off",
11305 "plt_branch",
11306 "plt_branch_r2off",
11307 "plt_call",
11308 "plt_call" };
11309
11310 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11311 len2 = strlen (stub_entry->root.string);
11312 name = bfd_malloc (len1 + len2 + 2);
11313 if (name == NULL)
11314 return FALSE;
11315 memcpy (name, stub_entry->root.string, 9);
11316 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11317 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11318 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11319 if (h == NULL)
11320 return FALSE;
11321 if (h->root.type == bfd_link_hash_new)
11322 {
11323 h->root.type = bfd_link_hash_defined;
11324 h->root.u.def.section = stub_entry->group->stub_sec;
11325 h->root.u.def.value = stub_entry->stub_offset;
11326 h->ref_regular = 1;
11327 h->def_regular = 1;
11328 h->ref_regular_nonweak = 1;
11329 h->forced_local = 1;
11330 h->non_elf = 0;
11331 h->root.linker_def = 1;
11332 }
11333 }
11334
11335 return TRUE;
11336 }
11337
11338 /* As above, but don't actually build the stub. Just bump offset so
11339 we know stub section sizes, and select plt_branch stubs where
11340 long_branch stubs won't do. */
11341
11342 static bfd_boolean
11343 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11344 {
11345 struct ppc_stub_hash_entry *stub_entry;
11346 struct bfd_link_info *info;
11347 struct ppc_link_hash_table *htab;
11348 bfd_vma off;
11349 int size;
11350
11351 /* Massage our args to the form they really have. */
11352 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11353 info = in_arg;
11354
11355 htab = ppc_hash_table (info);
11356 if (htab == NULL)
11357 return FALSE;
11358
11359 if (stub_entry->h != NULL
11360 && stub_entry->h->save_res
11361 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11362 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11363 {
11364 /* Don't make stubs to out-of-line register save/restore
11365 functions. Instead, emit copies of the functions. */
11366 stub_entry->group->needs_save_res = 1;
11367 stub_entry->stub_type = ppc_stub_save_res;
11368 return TRUE;
11369 }
11370
11371 if (stub_entry->stub_type == ppc_stub_plt_call
11372 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11373 {
11374 asection *plt;
11375 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11376 if (off >= (bfd_vma) -2)
11377 abort ();
11378 plt = htab->elf.splt;
11379 if (!htab->elf.dynamic_sections_created
11380 || stub_entry->h == NULL
11381 || stub_entry->h->elf.dynindx == -1)
11382 plt = htab->elf.iplt;
11383 off += (plt->output_offset
11384 + plt->output_section->vma
11385 - elf_gp (plt->output_section->owner)
11386 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11387
11388 size = plt_stub_size (htab, stub_entry, off);
11389 if (htab->params->plt_stub_align)
11390 size += plt_stub_pad (htab, stub_entry, off);
11391 if (info->emitrelocations)
11392 {
11393 stub_entry->group->stub_sec->reloc_count
11394 += ((PPC_HA (off) != 0)
11395 + (htab->opd_abi
11396 ? 2 + (htab->params->plt_static_chain
11397 && PPC_HA (off + 16) == PPC_HA (off))
11398 : 1));
11399 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11400 }
11401 }
11402 else
11403 {
11404 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11405 variants. */
11406 bfd_vma r2off = 0;
11407 bfd_vma local_off = 0;
11408
11409 off = (stub_entry->target_value
11410 + stub_entry->target_section->output_offset
11411 + stub_entry->target_section->output_section->vma);
11412 off -= (stub_entry->group->stub_sec->size
11413 + stub_entry->group->stub_sec->output_offset
11414 + stub_entry->group->stub_sec->output_section->vma);
11415
11416 /* Reset the stub type from the plt variant in case we now
11417 can reach with a shorter stub. */
11418 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11419 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11420
11421 size = 4;
11422 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11423 {
11424 r2off = get_r2off (info, stub_entry);
11425 if (r2off == (bfd_vma) -1)
11426 {
11427 htab->stub_error = TRUE;
11428 return FALSE;
11429 }
11430 size = 8;
11431 if (PPC_HA (r2off) != 0)
11432 size += 4;
11433 if (PPC_LO (r2off) != 0)
11434 size += 4;
11435 off -= size - 4;
11436 }
11437
11438 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11439
11440 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11441 Do the same for -R objects without function descriptors. */
11442 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11443 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11444 && r2off == 0
11445 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11446 {
11447 struct ppc_branch_hash_entry *br_entry;
11448
11449 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11450 stub_entry->root.string + 9,
11451 TRUE, FALSE);
11452 if (br_entry == NULL)
11453 {
11454 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11455 stub_entry->root.string);
11456 htab->stub_error = TRUE;
11457 return FALSE;
11458 }
11459
11460 if (br_entry->iter != htab->stub_iteration)
11461 {
11462 br_entry->iter = htab->stub_iteration;
11463 br_entry->offset = htab->brlt->size;
11464 htab->brlt->size += 8;
11465
11466 if (htab->relbrlt != NULL)
11467 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11468 else if (info->emitrelocations)
11469 {
11470 htab->brlt->reloc_count += 1;
11471 htab->brlt->flags |= SEC_RELOC;
11472 }
11473 }
11474
11475 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11476 off = (br_entry->offset
11477 + htab->brlt->output_offset
11478 + htab->brlt->output_section->vma
11479 - elf_gp (htab->brlt->output_section->owner)
11480 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11481
11482 if (info->emitrelocations)
11483 {
11484 stub_entry->group->stub_sec->reloc_count
11485 += 1 + (PPC_HA (off) != 0);
11486 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11487 }
11488
11489 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11490 {
11491 size = 12;
11492 if (PPC_HA (off) != 0)
11493 size = 16;
11494 }
11495 else
11496 {
11497 size = 16;
11498 if (PPC_HA (off) != 0)
11499 size += 4;
11500
11501 if (PPC_HA (r2off) != 0)
11502 size += 4;
11503 if (PPC_LO (r2off) != 0)
11504 size += 4;
11505 }
11506 }
11507 else if (info->emitrelocations)
11508 {
11509 stub_entry->group->stub_sec->reloc_count += 1;
11510 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11511 }
11512 }
11513
11514 stub_entry->group->stub_sec->size += size;
11515 return TRUE;
11516 }
11517
11518 /* Set up various things so that we can make a list of input sections
11519 for each output section included in the link. Returns -1 on error,
11520 0 when no stubs will be needed, and 1 on success. */
11521
11522 int
11523 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11524 {
11525 unsigned int id;
11526 bfd_size_type amt;
11527 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11528
11529 if (htab == NULL)
11530 return -1;
11531
11532 htab->sec_info_arr_size = bfd_get_next_section_id ();
11533 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11534 htab->sec_info = bfd_zmalloc (amt);
11535 if (htab->sec_info == NULL)
11536 return -1;
11537
11538 /* Set toc_off for com, und, abs and ind sections. */
11539 for (id = 0; id < 3; id++)
11540 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11541
11542 return 1;
11543 }
11544
11545 /* Set up for first pass at multitoc partitioning. */
11546
11547 void
11548 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11549 {
11550 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11551
11552 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11553 htab->toc_bfd = NULL;
11554 htab->toc_first_sec = NULL;
11555 }
11556
11557 /* The linker repeatedly calls this function for each TOC input section
11558 and linker generated GOT section. Group input bfds such that the toc
11559 within a group is less than 64k in size. */
11560
11561 bfd_boolean
11562 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11563 {
11564 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11565 bfd_vma addr, off, limit;
11566
11567 if (htab == NULL)
11568 return FALSE;
11569
11570 if (!htab->second_toc_pass)
11571 {
11572 /* Keep track of the first .toc or .got section for this input bfd. */
11573 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11574
11575 if (new_bfd)
11576 {
11577 htab->toc_bfd = isec->owner;
11578 htab->toc_first_sec = isec;
11579 }
11580
11581 addr = isec->output_offset + isec->output_section->vma;
11582 off = addr - htab->toc_curr;
11583 limit = 0x80008000;
11584 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11585 limit = 0x10000;
11586 if (off + isec->size > limit)
11587 {
11588 addr = (htab->toc_first_sec->output_offset
11589 + htab->toc_first_sec->output_section->vma);
11590 htab->toc_curr = addr;
11591 htab->toc_curr &= -TOC_BASE_ALIGN;
11592 }
11593
11594 /* toc_curr is the base address of this toc group. Set elf_gp
11595 for the input section to be the offset relative to the
11596 output toc base plus 0x8000. Making the input elf_gp an
11597 offset allows us to move the toc as a whole without
11598 recalculating input elf_gp. */
11599 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11600 off += TOC_BASE_OFF;
11601
11602 /* Die if someone uses a linker script that doesn't keep input
11603 file .toc and .got together. */
11604 if (new_bfd
11605 && elf_gp (isec->owner) != 0
11606 && elf_gp (isec->owner) != off)
11607 return FALSE;
11608
11609 elf_gp (isec->owner) = off;
11610 return TRUE;
11611 }
11612
11613 /* During the second pass toc_first_sec points to the start of
11614 a toc group, and toc_curr is used to track the old elf_gp.
11615 We use toc_bfd to ensure we only look at each bfd once. */
11616 if (htab->toc_bfd == isec->owner)
11617 return TRUE;
11618 htab->toc_bfd = isec->owner;
11619
11620 if (htab->toc_first_sec == NULL
11621 || htab->toc_curr != elf_gp (isec->owner))
11622 {
11623 htab->toc_curr = elf_gp (isec->owner);
11624 htab->toc_first_sec = isec;
11625 }
11626 addr = (htab->toc_first_sec->output_offset
11627 + htab->toc_first_sec->output_section->vma);
11628 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11629 elf_gp (isec->owner) = off;
11630
11631 return TRUE;
11632 }
11633
11634 /* Called via elf_link_hash_traverse to merge GOT entries for global
11635 symbol H. */
11636
11637 static bfd_boolean
11638 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11639 {
11640 if (h->root.type == bfd_link_hash_indirect)
11641 return TRUE;
11642
11643 merge_got_entries (&h->got.glist);
11644
11645 return TRUE;
11646 }
11647
11648 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11649 symbol H. */
11650
11651 static bfd_boolean
11652 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11653 {
11654 struct got_entry *gent;
11655
11656 if (h->root.type == bfd_link_hash_indirect)
11657 return TRUE;
11658
11659 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11660 if (!gent->is_indirect)
11661 allocate_got (h, (struct bfd_link_info *) inf, gent);
11662 return TRUE;
11663 }
11664
11665 /* Called on the first multitoc pass after the last call to
11666 ppc64_elf_next_toc_section. This function removes duplicate GOT
11667 entries. */
11668
11669 bfd_boolean
11670 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11671 {
11672 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11673 struct bfd *ibfd, *ibfd2;
11674 bfd_boolean done_something;
11675
11676 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11677
11678 if (!htab->do_multi_toc)
11679 return FALSE;
11680
11681 /* Merge global sym got entries within a toc group. */
11682 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11683
11684 /* And tlsld_got. */
11685 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11686 {
11687 struct got_entry *ent, *ent2;
11688
11689 if (!is_ppc64_elf (ibfd))
11690 continue;
11691
11692 ent = ppc64_tlsld_got (ibfd);
11693 if (!ent->is_indirect
11694 && ent->got.offset != (bfd_vma) -1)
11695 {
11696 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11697 {
11698 if (!is_ppc64_elf (ibfd2))
11699 continue;
11700
11701 ent2 = ppc64_tlsld_got (ibfd2);
11702 if (!ent2->is_indirect
11703 && ent2->got.offset != (bfd_vma) -1
11704 && elf_gp (ibfd2) == elf_gp (ibfd))
11705 {
11706 ent2->is_indirect = TRUE;
11707 ent2->got.ent = ent;
11708 }
11709 }
11710 }
11711 }
11712
11713 /* Zap sizes of got sections. */
11714 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11715 htab->elf.irelplt->size -= htab->got_reli_size;
11716 htab->got_reli_size = 0;
11717
11718 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11719 {
11720 asection *got, *relgot;
11721
11722 if (!is_ppc64_elf (ibfd))
11723 continue;
11724
11725 got = ppc64_elf_tdata (ibfd)->got;
11726 if (got != NULL)
11727 {
11728 got->rawsize = got->size;
11729 got->size = 0;
11730 relgot = ppc64_elf_tdata (ibfd)->relgot;
11731 relgot->rawsize = relgot->size;
11732 relgot->size = 0;
11733 }
11734 }
11735
11736 /* Now reallocate the got, local syms first. We don't need to
11737 allocate section contents again since we never increase size. */
11738 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11739 {
11740 struct got_entry **lgot_ents;
11741 struct got_entry **end_lgot_ents;
11742 struct plt_entry **local_plt;
11743 struct plt_entry **end_local_plt;
11744 unsigned char *lgot_masks;
11745 bfd_size_type locsymcount;
11746 Elf_Internal_Shdr *symtab_hdr;
11747 asection *s;
11748
11749 if (!is_ppc64_elf (ibfd))
11750 continue;
11751
11752 lgot_ents = elf_local_got_ents (ibfd);
11753 if (!lgot_ents)
11754 continue;
11755
11756 symtab_hdr = &elf_symtab_hdr (ibfd);
11757 locsymcount = symtab_hdr->sh_info;
11758 end_lgot_ents = lgot_ents + locsymcount;
11759 local_plt = (struct plt_entry **) end_lgot_ents;
11760 end_local_plt = local_plt + locsymcount;
11761 lgot_masks = (unsigned char *) end_local_plt;
11762 s = ppc64_elf_tdata (ibfd)->got;
11763 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11764 {
11765 struct got_entry *ent;
11766
11767 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11768 {
11769 unsigned int ent_size = 8;
11770 unsigned int rel_size = sizeof (Elf64_External_Rela);
11771
11772 ent->got.offset = s->size;
11773 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11774 {
11775 ent_size *= 2;
11776 rel_size *= 2;
11777 }
11778 s->size += ent_size;
11779 if ((*lgot_masks & PLT_IFUNC) != 0)
11780 {
11781 htab->elf.irelplt->size += rel_size;
11782 htab->got_reli_size += rel_size;
11783 }
11784 else if (bfd_link_pic (info))
11785 {
11786 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11787 srel->size += rel_size;
11788 }
11789 }
11790 }
11791 }
11792
11793 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11794
11795 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11796 {
11797 struct got_entry *ent;
11798
11799 if (!is_ppc64_elf (ibfd))
11800 continue;
11801
11802 ent = ppc64_tlsld_got (ibfd);
11803 if (!ent->is_indirect
11804 && ent->got.offset != (bfd_vma) -1)
11805 {
11806 asection *s = ppc64_elf_tdata (ibfd)->got;
11807 ent->got.offset = s->size;
11808 s->size += 16;
11809 if (bfd_link_pic (info))
11810 {
11811 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11812 srel->size += sizeof (Elf64_External_Rela);
11813 }
11814 }
11815 }
11816
11817 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11818 if (!done_something)
11819 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11820 {
11821 asection *got;
11822
11823 if (!is_ppc64_elf (ibfd))
11824 continue;
11825
11826 got = ppc64_elf_tdata (ibfd)->got;
11827 if (got != NULL)
11828 {
11829 done_something = got->rawsize != got->size;
11830 if (done_something)
11831 break;
11832 }
11833 }
11834
11835 if (done_something)
11836 (*htab->params->layout_sections_again) ();
11837
11838 /* Set up for second pass over toc sections to recalculate elf_gp
11839 on input sections. */
11840 htab->toc_bfd = NULL;
11841 htab->toc_first_sec = NULL;
11842 htab->second_toc_pass = TRUE;
11843 return done_something;
11844 }
11845
11846 /* Called after second pass of multitoc partitioning. */
11847
11848 void
11849 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11850 {
11851 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11852
11853 /* After the second pass, toc_curr tracks the TOC offset used
11854 for code sections below in ppc64_elf_next_input_section. */
11855 htab->toc_curr = TOC_BASE_OFF;
11856 }
11857
11858 /* No toc references were found in ISEC. If the code in ISEC makes no
11859 calls, then there's no need to use toc adjusting stubs when branching
11860 into ISEC. Actually, indirect calls from ISEC are OK as they will
11861 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11862 needed, and 2 if a cyclical call-graph was found but no other reason
11863 for a stub was detected. If called from the top level, a return of
11864 2 means the same as a return of 0. */
11865
11866 static int
11867 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11868 {
11869 int ret;
11870
11871 /* Mark this section as checked. */
11872 isec->call_check_done = 1;
11873
11874 /* We know none of our code bearing sections will need toc stubs. */
11875 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11876 return 0;
11877
11878 if (isec->size == 0)
11879 return 0;
11880
11881 if (isec->output_section == NULL)
11882 return 0;
11883
11884 ret = 0;
11885 if (isec->reloc_count != 0)
11886 {
11887 Elf_Internal_Rela *relstart, *rel;
11888 Elf_Internal_Sym *local_syms;
11889 struct ppc_link_hash_table *htab;
11890
11891 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11892 info->keep_memory);
11893 if (relstart == NULL)
11894 return -1;
11895
11896 /* Look for branches to outside of this section. */
11897 local_syms = NULL;
11898 htab = ppc_hash_table (info);
11899 if (htab == NULL)
11900 return -1;
11901
11902 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11903 {
11904 enum elf_ppc64_reloc_type r_type;
11905 unsigned long r_symndx;
11906 struct elf_link_hash_entry *h;
11907 struct ppc_link_hash_entry *eh;
11908 Elf_Internal_Sym *sym;
11909 asection *sym_sec;
11910 struct _opd_sec_data *opd;
11911 bfd_vma sym_value;
11912 bfd_vma dest;
11913
11914 r_type = ELF64_R_TYPE (rel->r_info);
11915 if (r_type != R_PPC64_REL24
11916 && r_type != R_PPC64_REL14
11917 && r_type != R_PPC64_REL14_BRTAKEN
11918 && r_type != R_PPC64_REL14_BRNTAKEN)
11919 continue;
11920
11921 r_symndx = ELF64_R_SYM (rel->r_info);
11922 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11923 isec->owner))
11924 {
11925 ret = -1;
11926 break;
11927 }
11928
11929 /* Calls to dynamic lib functions go through a plt call stub
11930 that uses r2. */
11931 eh = (struct ppc_link_hash_entry *) h;
11932 if (eh != NULL
11933 && (eh->elf.plt.plist != NULL
11934 || (eh->oh != NULL
11935 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11936 {
11937 ret = 1;
11938 break;
11939 }
11940
11941 if (sym_sec == NULL)
11942 /* Ignore other undefined symbols. */
11943 continue;
11944
11945 /* Assume branches to other sections not included in the
11946 link need stubs too, to cover -R and absolute syms. */
11947 if (sym_sec->output_section == NULL)
11948 {
11949 ret = 1;
11950 break;
11951 }
11952
11953 if (h == NULL)
11954 sym_value = sym->st_value;
11955 else
11956 {
11957 if (h->root.type != bfd_link_hash_defined
11958 && h->root.type != bfd_link_hash_defweak)
11959 abort ();
11960 sym_value = h->root.u.def.value;
11961 }
11962 sym_value += rel->r_addend;
11963
11964 /* If this branch reloc uses an opd sym, find the code section. */
11965 opd = get_opd_info (sym_sec);
11966 if (opd != NULL)
11967 {
11968 if (h == NULL && opd->adjust != NULL)
11969 {
11970 long adjust;
11971
11972 adjust = opd->adjust[OPD_NDX (sym_value)];
11973 if (adjust == -1)
11974 /* Assume deleted functions won't ever be called. */
11975 continue;
11976 sym_value += adjust;
11977 }
11978
11979 dest = opd_entry_value (sym_sec, sym_value,
11980 &sym_sec, NULL, FALSE);
11981 if (dest == (bfd_vma) -1)
11982 continue;
11983 }
11984 else
11985 dest = (sym_value
11986 + sym_sec->output_offset
11987 + sym_sec->output_section->vma);
11988
11989 /* Ignore branch to self. */
11990 if (sym_sec == isec)
11991 continue;
11992
11993 /* If the called function uses the toc, we need a stub. */
11994 if (sym_sec->has_toc_reloc
11995 || sym_sec->makes_toc_func_call)
11996 {
11997 ret = 1;
11998 break;
11999 }
12000
12001 /* Assume any branch that needs a long branch stub might in fact
12002 need a plt_branch stub. A plt_branch stub uses r2. */
12003 else if (dest - (isec->output_offset
12004 + isec->output_section->vma
12005 + rel->r_offset) + (1 << 25)
12006 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
12007 ? h->other
12008 : sym->st_other))
12009 {
12010 ret = 1;
12011 break;
12012 }
12013
12014 /* If calling back to a section in the process of being
12015 tested, we can't say for sure that no toc adjusting stubs
12016 are needed, so don't return zero. */
12017 else if (sym_sec->call_check_in_progress)
12018 ret = 2;
12019
12020 /* Branches to another section that itself doesn't have any TOC
12021 references are OK. Recursively call ourselves to check. */
12022 else if (!sym_sec->call_check_done)
12023 {
12024 int recur;
12025
12026 /* Mark current section as indeterminate, so that other
12027 sections that call back to current won't be marked as
12028 known. */
12029 isec->call_check_in_progress = 1;
12030 recur = toc_adjusting_stub_needed (info, sym_sec);
12031 isec->call_check_in_progress = 0;
12032
12033 if (recur != 0)
12034 {
12035 ret = recur;
12036 if (recur != 2)
12037 break;
12038 }
12039 }
12040 }
12041
12042 if (local_syms != NULL
12043 && (elf_symtab_hdr (isec->owner).contents
12044 != (unsigned char *) local_syms))
12045 free (local_syms);
12046 if (elf_section_data (isec)->relocs != relstart)
12047 free (relstart);
12048 }
12049
12050 if ((ret & 1) == 0
12051 && isec->map_head.s != NULL
12052 && (strcmp (isec->output_section->name, ".init") == 0
12053 || strcmp (isec->output_section->name, ".fini") == 0))
12054 {
12055 if (isec->map_head.s->has_toc_reloc
12056 || isec->map_head.s->makes_toc_func_call)
12057 ret = 1;
12058 else if (!isec->map_head.s->call_check_done)
12059 {
12060 int recur;
12061 isec->call_check_in_progress = 1;
12062 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12063 isec->call_check_in_progress = 0;
12064 if (recur != 0)
12065 ret = recur;
12066 }
12067 }
12068
12069 if (ret == 1)
12070 isec->makes_toc_func_call = 1;
12071
12072 return ret;
12073 }
12074
12075 /* The linker repeatedly calls this function for each input section,
12076 in the order that input sections are linked into output sections.
12077 Build lists of input sections to determine groupings between which
12078 we may insert linker stubs. */
12079
12080 bfd_boolean
12081 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12082 {
12083 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12084
12085 if (htab == NULL)
12086 return FALSE;
12087
12088 if ((isec->output_section->flags & SEC_CODE) != 0
12089 && isec->output_section->id < htab->sec_info_arr_size)
12090 {
12091 /* This happens to make the list in reverse order,
12092 which is what we want. */
12093 htab->sec_info[isec->id].u.list
12094 = htab->sec_info[isec->output_section->id].u.list;
12095 htab->sec_info[isec->output_section->id].u.list = isec;
12096 }
12097
12098 if (htab->multi_toc_needed)
12099 {
12100 /* Analyse sections that aren't already flagged as needing a
12101 valid toc pointer. Exclude .fixup for the linux kernel.
12102 .fixup contains branches, but only back to the function that
12103 hit an exception. */
12104 if (!(isec->has_toc_reloc
12105 || (isec->flags & SEC_CODE) == 0
12106 || strcmp (isec->name, ".fixup") == 0
12107 || isec->call_check_done))
12108 {
12109 if (toc_adjusting_stub_needed (info, isec) < 0)
12110 return FALSE;
12111 }
12112 /* Make all sections use the TOC assigned for this object file.
12113 This will be wrong for pasted sections; We fix that in
12114 check_pasted_section(). */
12115 if (elf_gp (isec->owner) != 0)
12116 htab->toc_curr = elf_gp (isec->owner);
12117 }
12118
12119 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12120 return TRUE;
12121 }
12122
12123 /* Check that all .init and .fini sections use the same toc, if they
12124 have toc relocs. */
12125
12126 static bfd_boolean
12127 check_pasted_section (struct bfd_link_info *info, const char *name)
12128 {
12129 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12130
12131 if (o != NULL)
12132 {
12133 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12134 bfd_vma toc_off = 0;
12135 asection *i;
12136
12137 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12138 if (i->has_toc_reloc)
12139 {
12140 if (toc_off == 0)
12141 toc_off = htab->sec_info[i->id].toc_off;
12142 else if (toc_off != htab->sec_info[i->id].toc_off)
12143 return FALSE;
12144 }
12145
12146 if (toc_off == 0)
12147 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12148 if (i->makes_toc_func_call)
12149 {
12150 toc_off = htab->sec_info[i->id].toc_off;
12151 break;
12152 }
12153
12154 /* Make sure the whole pasted function uses the same toc offset. */
12155 if (toc_off != 0)
12156 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12157 htab->sec_info[i->id].toc_off = toc_off;
12158 }
12159 return TRUE;
12160 }
12161
12162 bfd_boolean
12163 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12164 {
12165 return (check_pasted_section (info, ".init")
12166 & check_pasted_section (info, ".fini"));
12167 }
12168
12169 /* See whether we can group stub sections together. Grouping stub
12170 sections may result in fewer stubs. More importantly, we need to
12171 put all .init* and .fini* stubs at the beginning of the .init or
12172 .fini output sections respectively, because glibc splits the
12173 _init and _fini functions into multiple parts. Putting a stub in
12174 the middle of a function is not a good idea. */
12175
12176 static bfd_boolean
12177 group_sections (struct bfd_link_info *info,
12178 bfd_size_type stub_group_size,
12179 bfd_boolean stubs_always_before_branch)
12180 {
12181 struct ppc_link_hash_table *htab;
12182 asection *osec;
12183 bfd_boolean suppress_size_errors;
12184
12185 htab = ppc_hash_table (info);
12186 if (htab == NULL)
12187 return FALSE;
12188
12189 suppress_size_errors = FALSE;
12190 if (stub_group_size == 1)
12191 {
12192 /* Default values. */
12193 if (stubs_always_before_branch)
12194 stub_group_size = 0x1e00000;
12195 else
12196 stub_group_size = 0x1c00000;
12197 suppress_size_errors = TRUE;
12198 }
12199
12200 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12201 {
12202 asection *tail;
12203
12204 if (osec->id >= htab->sec_info_arr_size)
12205 continue;
12206
12207 tail = htab->sec_info[osec->id].u.list;
12208 while (tail != NULL)
12209 {
12210 asection *curr;
12211 asection *prev;
12212 bfd_size_type total;
12213 bfd_boolean big_sec;
12214 bfd_vma curr_toc;
12215 struct map_stub *group;
12216 bfd_size_type group_size;
12217
12218 curr = tail;
12219 total = tail->size;
12220 group_size = (ppc64_elf_section_data (tail) != NULL
12221 && ppc64_elf_section_data (tail)->has_14bit_branch
12222 ? stub_group_size >> 10 : stub_group_size);
12223
12224 big_sec = total > group_size;
12225 if (big_sec && !suppress_size_errors)
12226 /* xgettext:c-format */
12227 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12228 tail->owner, tail);
12229 curr_toc = htab->sec_info[tail->id].toc_off;
12230
12231 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12232 && ((total += curr->output_offset - prev->output_offset)
12233 < (ppc64_elf_section_data (prev) != NULL
12234 && ppc64_elf_section_data (prev)->has_14bit_branch
12235 ? (group_size = stub_group_size >> 10) : group_size))
12236 && htab->sec_info[prev->id].toc_off == curr_toc)
12237 curr = prev;
12238
12239 /* OK, the size from the start of CURR to the end is less
12240 than group_size and thus can be handled by one stub
12241 section. (or the tail section is itself larger than
12242 group_size, in which case we may be toast.) We should
12243 really be keeping track of the total size of stubs added
12244 here, as stubs contribute to the final output section
12245 size. That's a little tricky, and this way will only
12246 break if stubs added make the total size more than 2^25,
12247 ie. for the default stub_group_size, if stubs total more
12248 than 2097152 bytes, or nearly 75000 plt call stubs. */
12249 group = bfd_alloc (curr->owner, sizeof (*group));
12250 if (group == NULL)
12251 return FALSE;
12252 group->link_sec = curr;
12253 group->stub_sec = NULL;
12254 group->needs_save_res = 0;
12255 group->next = htab->group;
12256 htab->group = group;
12257 do
12258 {
12259 prev = htab->sec_info[tail->id].u.list;
12260 /* Set up this stub group. */
12261 htab->sec_info[tail->id].u.group = group;
12262 }
12263 while (tail != curr && (tail = prev) != NULL);
12264
12265 /* But wait, there's more! Input sections up to group_size
12266 bytes before the stub section can be handled by it too.
12267 Don't do this if we have a really large section after the
12268 stubs, as adding more stubs increases the chance that
12269 branches may not reach into the stub section. */
12270 if (!stubs_always_before_branch && !big_sec)
12271 {
12272 total = 0;
12273 while (prev != NULL
12274 && ((total += tail->output_offset - prev->output_offset)
12275 < (ppc64_elf_section_data (prev) != NULL
12276 && ppc64_elf_section_data (prev)->has_14bit_branch
12277 ? (group_size = stub_group_size >> 10) : group_size))
12278 && htab->sec_info[prev->id].toc_off == curr_toc)
12279 {
12280 tail = prev;
12281 prev = htab->sec_info[tail->id].u.list;
12282 htab->sec_info[tail->id].u.group = group;
12283 }
12284 }
12285 tail = prev;
12286 }
12287 }
12288 return TRUE;
12289 }
12290
12291 static const unsigned char glink_eh_frame_cie[] =
12292 {
12293 0, 0, 0, 16, /* length. */
12294 0, 0, 0, 0, /* id. */
12295 1, /* CIE version. */
12296 'z', 'R', 0, /* Augmentation string. */
12297 4, /* Code alignment. */
12298 0x78, /* Data alignment. */
12299 65, /* RA reg. */
12300 1, /* Augmentation size. */
12301 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12302 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12303 };
12304
12305 /* Stripping output sections is normally done before dynamic section
12306 symbols have been allocated. This function is called later, and
12307 handles cases like htab->brlt which is mapped to its own output
12308 section. */
12309
12310 static void
12311 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12312 {
12313 if (isec->size == 0
12314 && isec->output_section->size == 0
12315 && !(isec->output_section->flags & SEC_KEEP)
12316 && !bfd_section_removed_from_list (info->output_bfd,
12317 isec->output_section)
12318 && elf_section_data (isec->output_section)->dynindx == 0)
12319 {
12320 isec->output_section->flags |= SEC_EXCLUDE;
12321 bfd_section_list_remove (info->output_bfd, isec->output_section);
12322 info->output_bfd->section_count--;
12323 }
12324 }
12325
12326 /* Determine and set the size of the stub section for a final link.
12327
12328 The basic idea here is to examine all the relocations looking for
12329 PC-relative calls to a target that is unreachable with a "bl"
12330 instruction. */
12331
12332 bfd_boolean
12333 ppc64_elf_size_stubs (struct bfd_link_info *info)
12334 {
12335 bfd_size_type stub_group_size;
12336 bfd_boolean stubs_always_before_branch;
12337 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12338
12339 if (htab == NULL)
12340 return FALSE;
12341
12342 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12343 htab->params->plt_thread_safe = 1;
12344 if (!htab->opd_abi)
12345 htab->params->plt_thread_safe = 0;
12346 else if (htab->params->plt_thread_safe == -1)
12347 {
12348 static const char *const thread_starter[] =
12349 {
12350 "pthread_create",
12351 /* libstdc++ */
12352 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12353 /* librt */
12354 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12355 "mq_notify", "create_timer",
12356 /* libanl */
12357 "getaddrinfo_a",
12358 /* libgomp */
12359 "GOMP_parallel",
12360 "GOMP_parallel_start",
12361 "GOMP_parallel_loop_static",
12362 "GOMP_parallel_loop_static_start",
12363 "GOMP_parallel_loop_dynamic",
12364 "GOMP_parallel_loop_dynamic_start",
12365 "GOMP_parallel_loop_guided",
12366 "GOMP_parallel_loop_guided_start",
12367 "GOMP_parallel_loop_runtime",
12368 "GOMP_parallel_loop_runtime_start",
12369 "GOMP_parallel_sections",
12370 "GOMP_parallel_sections_start",
12371 /* libgo */
12372 "__go_go",
12373 };
12374 unsigned i;
12375
12376 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12377 {
12378 struct elf_link_hash_entry *h;
12379 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12380 FALSE, FALSE, TRUE);
12381 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12382 if (htab->params->plt_thread_safe)
12383 break;
12384 }
12385 }
12386 stubs_always_before_branch = htab->params->group_size < 0;
12387 if (htab->params->group_size < 0)
12388 stub_group_size = -htab->params->group_size;
12389 else
12390 stub_group_size = htab->params->group_size;
12391
12392 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12393 return FALSE;
12394
12395 #define STUB_SHRINK_ITER 20
12396 /* Loop until no stubs added. After iteration 20 of this loop we may
12397 exit on a stub section shrinking. This is to break out of a
12398 pathological case where adding stubs on one iteration decreases
12399 section gaps (perhaps due to alignment), which then requires
12400 fewer or smaller stubs on the next iteration. */
12401
12402 while (1)
12403 {
12404 bfd *input_bfd;
12405 unsigned int bfd_indx;
12406 struct map_stub *group;
12407 asection *stub_sec;
12408
12409 htab->stub_iteration += 1;
12410
12411 for (input_bfd = info->input_bfds, bfd_indx = 0;
12412 input_bfd != NULL;
12413 input_bfd = input_bfd->link.next, bfd_indx++)
12414 {
12415 Elf_Internal_Shdr *symtab_hdr;
12416 asection *section;
12417 Elf_Internal_Sym *local_syms = NULL;
12418
12419 if (!is_ppc64_elf (input_bfd))
12420 continue;
12421
12422 /* We'll need the symbol table in a second. */
12423 symtab_hdr = &elf_symtab_hdr (input_bfd);
12424 if (symtab_hdr->sh_info == 0)
12425 continue;
12426
12427 /* Walk over each section attached to the input bfd. */
12428 for (section = input_bfd->sections;
12429 section != NULL;
12430 section = section->next)
12431 {
12432 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12433
12434 /* If there aren't any relocs, then there's nothing more
12435 to do. */
12436 if ((section->flags & SEC_RELOC) == 0
12437 || (section->flags & SEC_ALLOC) == 0
12438 || (section->flags & SEC_LOAD) == 0
12439 || (section->flags & SEC_CODE) == 0
12440 || section->reloc_count == 0)
12441 continue;
12442
12443 /* If this section is a link-once section that will be
12444 discarded, then don't create any stubs. */
12445 if (section->output_section == NULL
12446 || section->output_section->owner != info->output_bfd)
12447 continue;
12448
12449 /* Get the relocs. */
12450 internal_relocs
12451 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12452 info->keep_memory);
12453 if (internal_relocs == NULL)
12454 goto error_ret_free_local;
12455
12456 /* Now examine each relocation. */
12457 irela = internal_relocs;
12458 irelaend = irela + section->reloc_count;
12459 for (; irela < irelaend; irela++)
12460 {
12461 enum elf_ppc64_reloc_type r_type;
12462 unsigned int r_indx;
12463 enum ppc_stub_type stub_type;
12464 struct ppc_stub_hash_entry *stub_entry;
12465 asection *sym_sec, *code_sec;
12466 bfd_vma sym_value, code_value;
12467 bfd_vma destination;
12468 unsigned long local_off;
12469 bfd_boolean ok_dest;
12470 struct ppc_link_hash_entry *hash;
12471 struct ppc_link_hash_entry *fdh;
12472 struct elf_link_hash_entry *h;
12473 Elf_Internal_Sym *sym;
12474 char *stub_name;
12475 const asection *id_sec;
12476 struct _opd_sec_data *opd;
12477 struct plt_entry *plt_ent;
12478
12479 r_type = ELF64_R_TYPE (irela->r_info);
12480 r_indx = ELF64_R_SYM (irela->r_info);
12481
12482 if (r_type >= R_PPC64_max)
12483 {
12484 bfd_set_error (bfd_error_bad_value);
12485 goto error_ret_free_internal;
12486 }
12487
12488 /* Only look for stubs on branch instructions. */
12489 if (r_type != R_PPC64_REL24
12490 && r_type != R_PPC64_REL14
12491 && r_type != R_PPC64_REL14_BRTAKEN
12492 && r_type != R_PPC64_REL14_BRNTAKEN)
12493 continue;
12494
12495 /* Now determine the call target, its name, value,
12496 section. */
12497 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12498 r_indx, input_bfd))
12499 goto error_ret_free_internal;
12500 hash = (struct ppc_link_hash_entry *) h;
12501
12502 ok_dest = FALSE;
12503 fdh = NULL;
12504 sym_value = 0;
12505 if (hash == NULL)
12506 {
12507 sym_value = sym->st_value;
12508 if (sym_sec != NULL
12509 && sym_sec->output_section != NULL)
12510 ok_dest = TRUE;
12511 }
12512 else if (hash->elf.root.type == bfd_link_hash_defined
12513 || hash->elf.root.type == bfd_link_hash_defweak)
12514 {
12515 sym_value = hash->elf.root.u.def.value;
12516 if (sym_sec->output_section != NULL)
12517 ok_dest = TRUE;
12518 }
12519 else if (hash->elf.root.type == bfd_link_hash_undefweak
12520 || hash->elf.root.type == bfd_link_hash_undefined)
12521 {
12522 /* Recognise an old ABI func code entry sym, and
12523 use the func descriptor sym instead if it is
12524 defined. */
12525 if (hash->elf.root.root.string[0] == '.'
12526 && hash->oh != NULL)
12527 {
12528 fdh = ppc_follow_link (hash->oh);
12529 if (fdh->elf.root.type == bfd_link_hash_defined
12530 || fdh->elf.root.type == bfd_link_hash_defweak)
12531 {
12532 sym_sec = fdh->elf.root.u.def.section;
12533 sym_value = fdh->elf.root.u.def.value;
12534 if (sym_sec->output_section != NULL)
12535 ok_dest = TRUE;
12536 }
12537 else
12538 fdh = NULL;
12539 }
12540 }
12541 else
12542 {
12543 bfd_set_error (bfd_error_bad_value);
12544 goto error_ret_free_internal;
12545 }
12546
12547 destination = 0;
12548 local_off = 0;
12549 if (ok_dest)
12550 {
12551 sym_value += irela->r_addend;
12552 destination = (sym_value
12553 + sym_sec->output_offset
12554 + sym_sec->output_section->vma);
12555 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12556 ? hash->elf.other
12557 : sym->st_other);
12558 }
12559
12560 code_sec = sym_sec;
12561 code_value = sym_value;
12562 opd = get_opd_info (sym_sec);
12563 if (opd != NULL)
12564 {
12565 bfd_vma dest;
12566
12567 if (hash == NULL && opd->adjust != NULL)
12568 {
12569 long adjust = opd->adjust[OPD_NDX (sym_value)];
12570 if (adjust == -1)
12571 continue;
12572 code_value += adjust;
12573 sym_value += adjust;
12574 }
12575 dest = opd_entry_value (sym_sec, sym_value,
12576 &code_sec, &code_value, FALSE);
12577 if (dest != (bfd_vma) -1)
12578 {
12579 destination = dest;
12580 if (fdh != NULL)
12581 {
12582 /* Fixup old ABI sym to point at code
12583 entry. */
12584 hash->elf.root.type = bfd_link_hash_defweak;
12585 hash->elf.root.u.def.section = code_sec;
12586 hash->elf.root.u.def.value = code_value;
12587 }
12588 }
12589 }
12590
12591 /* Determine what (if any) linker stub is needed. */
12592 plt_ent = NULL;
12593 stub_type = ppc_type_of_stub (section, irela, &hash,
12594 &plt_ent, destination,
12595 local_off);
12596
12597 if (stub_type != ppc_stub_plt_call)
12598 {
12599 /* Check whether we need a TOC adjusting stub.
12600 Since the linker pastes together pieces from
12601 different object files when creating the
12602 _init and _fini functions, it may be that a
12603 call to what looks like a local sym is in
12604 fact a call needing a TOC adjustment. */
12605 if (code_sec != NULL
12606 && code_sec->output_section != NULL
12607 && (htab->sec_info[code_sec->id].toc_off
12608 != htab->sec_info[section->id].toc_off)
12609 && (code_sec->has_toc_reloc
12610 || code_sec->makes_toc_func_call))
12611 stub_type = ppc_stub_long_branch_r2off;
12612 }
12613
12614 if (stub_type == ppc_stub_none)
12615 continue;
12616
12617 /* __tls_get_addr calls might be eliminated. */
12618 if (stub_type != ppc_stub_plt_call
12619 && hash != NULL
12620 && (hash == htab->tls_get_addr
12621 || hash == htab->tls_get_addr_fd)
12622 && section->has_tls_reloc
12623 && irela != internal_relocs)
12624 {
12625 /* Get tls info. */
12626 unsigned char *tls_mask;
12627
12628 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12629 irela - 1, input_bfd))
12630 goto error_ret_free_internal;
12631 if (*tls_mask != 0)
12632 continue;
12633 }
12634
12635 if (stub_type == ppc_stub_plt_call)
12636 {
12637 if (!htab->opd_abi
12638 && htab->params->plt_localentry0 != 0
12639 && is_elfv2_localentry0 (&hash->elf))
12640 htab->has_plt_localentry0 = 1;
12641 else if (irela + 1 < irelaend
12642 && irela[1].r_offset == irela->r_offset + 4
12643 && (ELF64_R_TYPE (irela[1].r_info)
12644 == R_PPC64_TOCSAVE))
12645 {
12646 if (!tocsave_find (htab, INSERT,
12647 &local_syms, irela + 1, input_bfd))
12648 goto error_ret_free_internal;
12649 }
12650 else
12651 stub_type = ppc_stub_plt_call_r2save;
12652 }
12653
12654 /* Support for grouping stub sections. */
12655 id_sec = htab->sec_info[section->id].u.group->link_sec;
12656
12657 /* Get the name of this stub. */
12658 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12659 if (!stub_name)
12660 goto error_ret_free_internal;
12661
12662 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12663 stub_name, FALSE, FALSE);
12664 if (stub_entry != NULL)
12665 {
12666 /* The proper stub has already been created. */
12667 free (stub_name);
12668 if (stub_type == ppc_stub_plt_call_r2save)
12669 stub_entry->stub_type = stub_type;
12670 continue;
12671 }
12672
12673 stub_entry = ppc_add_stub (stub_name, section, info);
12674 if (stub_entry == NULL)
12675 {
12676 free (stub_name);
12677 error_ret_free_internal:
12678 if (elf_section_data (section)->relocs == NULL)
12679 free (internal_relocs);
12680 error_ret_free_local:
12681 if (local_syms != NULL
12682 && (symtab_hdr->contents
12683 != (unsigned char *) local_syms))
12684 free (local_syms);
12685 return FALSE;
12686 }
12687
12688 stub_entry->stub_type = stub_type;
12689 if (stub_type != ppc_stub_plt_call
12690 && stub_type != ppc_stub_plt_call_r2save)
12691 {
12692 stub_entry->target_value = code_value;
12693 stub_entry->target_section = code_sec;
12694 }
12695 else
12696 {
12697 stub_entry->target_value = sym_value;
12698 stub_entry->target_section = sym_sec;
12699 }
12700 stub_entry->h = hash;
12701 stub_entry->plt_ent = plt_ent;
12702 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12703
12704 if (stub_entry->h != NULL)
12705 htab->stub_globals += 1;
12706 }
12707
12708 /* We're done with the internal relocs, free them. */
12709 if (elf_section_data (section)->relocs != internal_relocs)
12710 free (internal_relocs);
12711 }
12712
12713 if (local_syms != NULL
12714 && symtab_hdr->contents != (unsigned char *) local_syms)
12715 {
12716 if (!info->keep_memory)
12717 free (local_syms);
12718 else
12719 symtab_hdr->contents = (unsigned char *) local_syms;
12720 }
12721 }
12722
12723 /* We may have added some stubs. Find out the new size of the
12724 stub sections. */
12725 for (stub_sec = htab->params->stub_bfd->sections;
12726 stub_sec != NULL;
12727 stub_sec = stub_sec->next)
12728 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12729 {
12730 if (htab->stub_iteration <= STUB_SHRINK_ITER
12731 || stub_sec->rawsize < stub_sec->size)
12732 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12733 stub_sec->rawsize = stub_sec->size;
12734 stub_sec->size = 0;
12735 stub_sec->reloc_count = 0;
12736 stub_sec->flags &= ~SEC_RELOC;
12737 }
12738
12739 htab->brlt->size = 0;
12740 htab->brlt->reloc_count = 0;
12741 htab->brlt->flags &= ~SEC_RELOC;
12742 if (htab->relbrlt != NULL)
12743 htab->relbrlt->size = 0;
12744
12745 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12746
12747 for (group = htab->group; group != NULL; group = group->next)
12748 if (group->needs_save_res)
12749 group->stub_sec->size += htab->sfpr->size;
12750
12751 if (info->emitrelocations
12752 && htab->glink != NULL && htab->glink->size != 0)
12753 {
12754 htab->glink->reloc_count = 1;
12755 htab->glink->flags |= SEC_RELOC;
12756 }
12757
12758 if (htab->glink_eh_frame != NULL
12759 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12760 && htab->glink_eh_frame->output_section->size != 0)
12761 {
12762 size_t size = 0, align = 4;
12763
12764 for (stub_sec = htab->params->stub_bfd->sections;
12765 stub_sec != NULL;
12766 stub_sec = stub_sec->next)
12767 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12768 size += (17 + align - 1) & -align;
12769 if (htab->glink != NULL && htab->glink->size != 0)
12770 size += (24 + align - 1) & -align;
12771 if (size != 0)
12772 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12773 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12774 size = (size + align - 1) & -align;
12775 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12776 htab->glink_eh_frame->size = size;
12777 }
12778
12779 if (htab->params->plt_stub_align != 0)
12780 for (stub_sec = htab->params->stub_bfd->sections;
12781 stub_sec != NULL;
12782 stub_sec = stub_sec->next)
12783 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12784 stub_sec->size = ((stub_sec->size
12785 + (1 << htab->params->plt_stub_align) - 1)
12786 & -(1 << htab->params->plt_stub_align));
12787
12788 for (stub_sec = htab->params->stub_bfd->sections;
12789 stub_sec != NULL;
12790 stub_sec = stub_sec->next)
12791 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12792 && stub_sec->rawsize != stub_sec->size
12793 && (htab->stub_iteration <= STUB_SHRINK_ITER
12794 || stub_sec->rawsize < stub_sec->size))
12795 break;
12796
12797 if (stub_sec == NULL
12798 && (htab->glink_eh_frame == NULL
12799 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12800 break;
12801
12802 /* Ask the linker to do its stuff. */
12803 (*htab->params->layout_sections_again) ();
12804 }
12805
12806 if (htab->glink_eh_frame != NULL
12807 && htab->glink_eh_frame->size != 0)
12808 {
12809 bfd_vma val;
12810 bfd_byte *p, *last_fde;
12811 size_t last_fde_len, size, align, pad;
12812 asection *stub_sec;
12813
12814 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12815 if (p == NULL)
12816 return FALSE;
12817 htab->glink_eh_frame->contents = p;
12818 last_fde = p;
12819 align = 4;
12820
12821 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12822 /* CIE length (rewrite in case little-endian). */
12823 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12824 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12825 p += last_fde_len + 4;
12826
12827 for (stub_sec = htab->params->stub_bfd->sections;
12828 stub_sec != NULL;
12829 stub_sec = stub_sec->next)
12830 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12831 {
12832 last_fde = p;
12833 last_fde_len = ((17 + align - 1) & -align) - 4;
12834 /* FDE length. */
12835 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12836 p += 4;
12837 /* CIE pointer. */
12838 val = p - htab->glink_eh_frame->contents;
12839 bfd_put_32 (htab->elf.dynobj, val, p);
12840 p += 4;
12841 /* Offset to stub section, written later. */
12842 p += 4;
12843 /* stub section size. */
12844 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12845 p += 4;
12846 /* Augmentation. */
12847 p += 1;
12848 /* Pad. */
12849 p += ((17 + align - 1) & -align) - 17;
12850 }
12851 if (htab->glink != NULL && htab->glink->size != 0)
12852 {
12853 last_fde = p;
12854 last_fde_len = ((24 + align - 1) & -align) - 4;
12855 /* FDE length. */
12856 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12857 p += 4;
12858 /* CIE pointer. */
12859 val = p - htab->glink_eh_frame->contents;
12860 bfd_put_32 (htab->elf.dynobj, val, p);
12861 p += 4;
12862 /* Offset to .glink, written later. */
12863 p += 4;
12864 /* .glink size. */
12865 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12866 p += 4;
12867 /* Augmentation. */
12868 p += 1;
12869
12870 *p++ = DW_CFA_advance_loc + 1;
12871 *p++ = DW_CFA_register;
12872 *p++ = 65;
12873 *p++ = htab->opd_abi ? 12 : 0;
12874 *p++ = DW_CFA_advance_loc + 4;
12875 *p++ = DW_CFA_restore_extended;
12876 *p++ = 65;
12877 p += ((24 + align - 1) & -align) - 24;
12878 }
12879 /* Subsume any padding into the last FDE if user .eh_frame
12880 sections are aligned more than glink_eh_frame. Otherwise any
12881 zero padding will be seen as a terminator. */
12882 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12883 size = p - htab->glink_eh_frame->contents;
12884 pad = ((size + align - 1) & -align) - size;
12885 htab->glink_eh_frame->size = size + pad;
12886 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12887 }
12888
12889 maybe_strip_output (info, htab->brlt);
12890 if (htab->glink_eh_frame != NULL)
12891 maybe_strip_output (info, htab->glink_eh_frame);
12892
12893 return TRUE;
12894 }
12895
12896 /* Called after we have determined section placement. If sections
12897 move, we'll be called again. Provide a value for TOCstart. */
12898
12899 bfd_vma
12900 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12901 {
12902 asection *s;
12903 bfd_vma TOCstart, adjust;
12904
12905 if (info != NULL)
12906 {
12907 struct elf_link_hash_entry *h;
12908 struct elf_link_hash_table *htab = elf_hash_table (info);
12909
12910 if (is_elf_hash_table (htab)
12911 && htab->hgot != NULL)
12912 h = htab->hgot;
12913 else
12914 {
12915 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12916 if (is_elf_hash_table (htab))
12917 htab->hgot = h;
12918 }
12919 if (h != NULL
12920 && h->root.type == bfd_link_hash_defined
12921 && !h->root.linker_def
12922 && (!is_elf_hash_table (htab)
12923 || h->def_regular))
12924 {
12925 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12926 + h->root.u.def.section->output_offset
12927 + h->root.u.def.section->output_section->vma);
12928 _bfd_set_gp_value (obfd, TOCstart);
12929 return TOCstart;
12930 }
12931 }
12932
12933 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12934 order. The TOC starts where the first of these sections starts. */
12935 s = bfd_get_section_by_name (obfd, ".got");
12936 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12937 s = bfd_get_section_by_name (obfd, ".toc");
12938 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12939 s = bfd_get_section_by_name (obfd, ".tocbss");
12940 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12941 s = bfd_get_section_by_name (obfd, ".plt");
12942 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12943 {
12944 /* This may happen for
12945 o references to TOC base (SYM@toc / TOC[tc0]) without a
12946 .toc directive
12947 o bad linker script
12948 o --gc-sections and empty TOC sections
12949
12950 FIXME: Warn user? */
12951
12952 /* Look for a likely section. We probably won't even be
12953 using TOCstart. */
12954 for (s = obfd->sections; s != NULL; s = s->next)
12955 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12956 | SEC_EXCLUDE))
12957 == (SEC_ALLOC | SEC_SMALL_DATA))
12958 break;
12959 if (s == NULL)
12960 for (s = obfd->sections; s != NULL; s = s->next)
12961 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12962 == (SEC_ALLOC | SEC_SMALL_DATA))
12963 break;
12964 if (s == NULL)
12965 for (s = obfd->sections; s != NULL; s = s->next)
12966 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12967 == SEC_ALLOC)
12968 break;
12969 if (s == NULL)
12970 for (s = obfd->sections; s != NULL; s = s->next)
12971 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12972 break;
12973 }
12974
12975 TOCstart = 0;
12976 if (s != NULL)
12977 TOCstart = s->output_section->vma + s->output_offset;
12978
12979 /* Force alignment. */
12980 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12981 TOCstart -= adjust;
12982 _bfd_set_gp_value (obfd, TOCstart);
12983
12984 if (info != NULL && s != NULL)
12985 {
12986 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12987
12988 if (htab != NULL)
12989 {
12990 if (htab->elf.hgot != NULL)
12991 {
12992 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12993 htab->elf.hgot->root.u.def.section = s;
12994 }
12995 }
12996 else
12997 {
12998 struct bfd_link_hash_entry *bh = NULL;
12999 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
13000 s, TOC_BASE_OFF - adjust,
13001 NULL, FALSE, FALSE, &bh);
13002 }
13003 }
13004 return TOCstart;
13005 }
13006
13007 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
13008 write out any global entry stubs. */
13009
13010 static bfd_boolean
13011 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
13012 {
13013 struct bfd_link_info *info;
13014 struct ppc_link_hash_table *htab;
13015 struct plt_entry *pent;
13016 asection *s;
13017
13018 if (h->root.type == bfd_link_hash_indirect)
13019 return TRUE;
13020
13021 if (!h->pointer_equality_needed)
13022 return TRUE;
13023
13024 if (h->def_regular)
13025 return TRUE;
13026
13027 info = inf;
13028 htab = ppc_hash_table (info);
13029 if (htab == NULL)
13030 return FALSE;
13031
13032 s = htab->glink;
13033 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13034 if (pent->plt.offset != (bfd_vma) -1
13035 && pent->addend == 0)
13036 {
13037 bfd_byte *p;
13038 asection *plt;
13039 bfd_vma off;
13040
13041 p = s->contents + h->root.u.def.value;
13042 plt = htab->elf.splt;
13043 if (!htab->elf.dynamic_sections_created
13044 || h->dynindx == -1)
13045 plt = htab->elf.iplt;
13046 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13047 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13048
13049 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13050 {
13051 info->callbacks->einfo
13052 (_("%P: linkage table error against `%T'\n"),
13053 h->root.root.string);
13054 bfd_set_error (bfd_error_bad_value);
13055 htab->stub_error = TRUE;
13056 }
13057
13058 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13059 if (htab->params->emit_stub_syms)
13060 {
13061 size_t len = strlen (h->root.root.string);
13062 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13063
13064 if (name == NULL)
13065 return FALSE;
13066
13067 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13068 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13069 if (h == NULL)
13070 return FALSE;
13071 if (h->root.type == bfd_link_hash_new)
13072 {
13073 h->root.type = bfd_link_hash_defined;
13074 h->root.u.def.section = s;
13075 h->root.u.def.value = p - s->contents;
13076 h->ref_regular = 1;
13077 h->def_regular = 1;
13078 h->ref_regular_nonweak = 1;
13079 h->forced_local = 1;
13080 h->non_elf = 0;
13081 h->root.linker_def = 1;
13082 }
13083 }
13084
13085 if (PPC_HA (off) != 0)
13086 {
13087 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13088 p += 4;
13089 }
13090 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13091 p += 4;
13092 bfd_put_32 (s->owner, MTCTR_R12, p);
13093 p += 4;
13094 bfd_put_32 (s->owner, BCTR, p);
13095 break;
13096 }
13097 return TRUE;
13098 }
13099
13100 /* Build all the stubs associated with the current output file.
13101 The stubs are kept in a hash table attached to the main linker
13102 hash table. This function is called via gldelf64ppc_finish. */
13103
13104 bfd_boolean
13105 ppc64_elf_build_stubs (struct bfd_link_info *info,
13106 char **stats)
13107 {
13108 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13109 struct map_stub *group;
13110 asection *stub_sec;
13111 bfd_byte *p;
13112 int stub_sec_count = 0;
13113
13114 if (htab == NULL)
13115 return FALSE;
13116
13117 /* Allocate memory to hold the linker stubs. */
13118 for (stub_sec = htab->params->stub_bfd->sections;
13119 stub_sec != NULL;
13120 stub_sec = stub_sec->next)
13121 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
13122 && stub_sec->size != 0)
13123 {
13124 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13125 if (stub_sec->contents == NULL)
13126 return FALSE;
13127 stub_sec->size = 0;
13128 }
13129
13130 if (htab->glink != NULL && htab->glink->size != 0)
13131 {
13132 unsigned int indx;
13133 bfd_vma plt0;
13134
13135 /* Build the .glink plt call stub. */
13136 if (htab->params->emit_stub_syms)
13137 {
13138 struct elf_link_hash_entry *h;
13139 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13140 TRUE, FALSE, FALSE);
13141 if (h == NULL)
13142 return FALSE;
13143 if (h->root.type == bfd_link_hash_new)
13144 {
13145 h->root.type = bfd_link_hash_defined;
13146 h->root.u.def.section = htab->glink;
13147 h->root.u.def.value = 8;
13148 h->ref_regular = 1;
13149 h->def_regular = 1;
13150 h->ref_regular_nonweak = 1;
13151 h->forced_local = 1;
13152 h->non_elf = 0;
13153 h->root.linker_def = 1;
13154 }
13155 }
13156 plt0 = (htab->elf.splt->output_section->vma
13157 + htab->elf.splt->output_offset
13158 - 16);
13159 if (info->emitrelocations)
13160 {
13161 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13162 if (r == NULL)
13163 return FALSE;
13164 r->r_offset = (htab->glink->output_offset
13165 + htab->glink->output_section->vma);
13166 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13167 r->r_addend = plt0;
13168 }
13169 p = htab->glink->contents;
13170 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13171 bfd_put_64 (htab->glink->owner, plt0, p);
13172 p += 8;
13173 if (htab->opd_abi)
13174 {
13175 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13176 p += 4;
13177 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13178 p += 4;
13179 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13180 p += 4;
13181 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13182 p += 4;
13183 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13184 p += 4;
13185 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13186 p += 4;
13187 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13188 p += 4;
13189 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13190 p += 4;
13191 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13192 p += 4;
13193 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13194 p += 4;
13195 }
13196 else
13197 {
13198 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13199 p += 4;
13200 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13201 p += 4;
13202 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13203 p += 4;
13204 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13205 p += 4;
13206 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13207 p += 4;
13208 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13209 p += 4;
13210 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13211 p += 4;
13212 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13213 p += 4;
13214 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13215 p += 4;
13216 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13217 p += 4;
13218 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13219 p += 4;
13220 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13221 p += 4;
13222 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13223 p += 4;
13224 }
13225 bfd_put_32 (htab->glink->owner, BCTR, p);
13226 p += 4;
13227 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13228 {
13229 bfd_put_32 (htab->glink->owner, NOP, p);
13230 p += 4;
13231 }
13232
13233 /* Build the .glink lazy link call stubs. */
13234 indx = 0;
13235 while (p < htab->glink->contents + htab->glink->rawsize)
13236 {
13237 if (htab->opd_abi)
13238 {
13239 if (indx < 0x8000)
13240 {
13241 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13242 p += 4;
13243 }
13244 else
13245 {
13246 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13247 p += 4;
13248 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13249 p);
13250 p += 4;
13251 }
13252 }
13253 bfd_put_32 (htab->glink->owner,
13254 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13255 indx++;
13256 p += 4;
13257 }
13258
13259 /* Build .glink global entry stubs. */
13260 if (htab->glink->size > htab->glink->rawsize)
13261 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13262 }
13263
13264 if (htab->brlt != NULL && htab->brlt->size != 0)
13265 {
13266 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13267 htab->brlt->size);
13268 if (htab->brlt->contents == NULL)
13269 return FALSE;
13270 }
13271 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13272 {
13273 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13274 htab->relbrlt->size);
13275 if (htab->relbrlt->contents == NULL)
13276 return FALSE;
13277 }
13278
13279 /* Build the stubs as directed by the stub hash table. */
13280 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13281
13282 for (group = htab->group; group != NULL; group = group->next)
13283 if (group->needs_save_res)
13284 {
13285 stub_sec = group->stub_sec;
13286 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13287 htab->sfpr->size);
13288 if (htab->params->emit_stub_syms)
13289 {
13290 unsigned int i;
13291
13292 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13293 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13294 return FALSE;
13295 }
13296 stub_sec->size += htab->sfpr->size;
13297 }
13298
13299 if (htab->relbrlt != NULL)
13300 htab->relbrlt->reloc_count = 0;
13301
13302 if (htab->params->plt_stub_align != 0)
13303 for (stub_sec = htab->params->stub_bfd->sections;
13304 stub_sec != NULL;
13305 stub_sec = stub_sec->next)
13306 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13307 stub_sec->size = ((stub_sec->size
13308 + (1 << htab->params->plt_stub_align) - 1)
13309 & -(1 << htab->params->plt_stub_align));
13310
13311 for (stub_sec = htab->params->stub_bfd->sections;
13312 stub_sec != NULL;
13313 stub_sec = stub_sec->next)
13314 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13315 {
13316 stub_sec_count += 1;
13317 if (stub_sec->rawsize != stub_sec->size
13318 && (htab->stub_iteration <= STUB_SHRINK_ITER
13319 || stub_sec->rawsize < stub_sec->size))
13320 break;
13321 }
13322
13323 /* Note that the glink_eh_frame check here is not only testing that
13324 the generated size matched the calculated size but also that
13325 bfd_elf_discard_info didn't make any changes to the section. */
13326 if (stub_sec != NULL
13327 || (htab->glink_eh_frame != NULL
13328 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13329 {
13330 htab->stub_error = TRUE;
13331 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13332 }
13333
13334 if (htab->stub_error)
13335 return FALSE;
13336
13337 if (stats != NULL)
13338 {
13339 *stats = bfd_malloc (500);
13340 if (*stats == NULL)
13341 return FALSE;
13342
13343 sprintf (*stats, _("linker stubs in %u group%s\n"
13344 " branch %lu\n"
13345 " toc adjust %lu\n"
13346 " long branch %lu\n"
13347 " long toc adj %lu\n"
13348 " plt call %lu\n"
13349 " plt call toc %lu\n"
13350 " global entry %lu"),
13351 stub_sec_count,
13352 stub_sec_count == 1 ? "" : "s",
13353 htab->stub_count[ppc_stub_long_branch - 1],
13354 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13355 htab->stub_count[ppc_stub_plt_branch - 1],
13356 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13357 htab->stub_count[ppc_stub_plt_call - 1],
13358 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13359 htab->stub_count[ppc_stub_global_entry - 1]);
13360 }
13361 return TRUE;
13362 }
13363
13364 /* What to do when ld finds relocations against symbols defined in
13365 discarded sections. */
13366
13367 static unsigned int
13368 ppc64_elf_action_discarded (asection *sec)
13369 {
13370 if (strcmp (".opd", sec->name) == 0)
13371 return 0;
13372
13373 if (strcmp (".toc", sec->name) == 0)
13374 return 0;
13375
13376 if (strcmp (".toc1", sec->name) == 0)
13377 return 0;
13378
13379 return _bfd_elf_default_action_discarded (sec);
13380 }
13381
13382 /* The RELOCATE_SECTION function is called by the ELF backend linker
13383 to handle the relocations for a section.
13384
13385 The relocs are always passed as Rela structures; if the section
13386 actually uses Rel structures, the r_addend field will always be
13387 zero.
13388
13389 This function is responsible for adjust the section contents as
13390 necessary, and (if using Rela relocs and generating a
13391 relocatable output file) adjusting the reloc addend as
13392 necessary.
13393
13394 This function does not have to worry about setting the reloc
13395 address or the reloc symbol index.
13396
13397 LOCAL_SYMS is a pointer to the swapped in local symbols.
13398
13399 LOCAL_SECTIONS is an array giving the section in the input file
13400 corresponding to the st_shndx field of each local symbol.
13401
13402 The global hash table entry for the global symbols can be found
13403 via elf_sym_hashes (input_bfd).
13404
13405 When generating relocatable output, this function must handle
13406 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13407 going to be the section symbol corresponding to the output
13408 section, which means that the addend must be adjusted
13409 accordingly. */
13410
13411 static bfd_boolean
13412 ppc64_elf_relocate_section (bfd *output_bfd,
13413 struct bfd_link_info *info,
13414 bfd *input_bfd,
13415 asection *input_section,
13416 bfd_byte *contents,
13417 Elf_Internal_Rela *relocs,
13418 Elf_Internal_Sym *local_syms,
13419 asection **local_sections)
13420 {
13421 struct ppc_link_hash_table *htab;
13422 Elf_Internal_Shdr *symtab_hdr;
13423 struct elf_link_hash_entry **sym_hashes;
13424 Elf_Internal_Rela *rel;
13425 Elf_Internal_Rela *wrel;
13426 Elf_Internal_Rela *relend;
13427 Elf_Internal_Rela outrel;
13428 bfd_byte *loc;
13429 struct got_entry **local_got_ents;
13430 bfd_vma TOCstart;
13431 bfd_boolean ret = TRUE;
13432 bfd_boolean is_opd;
13433 /* Assume 'at' branch hints. */
13434 bfd_boolean is_isa_v2 = TRUE;
13435 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13436
13437 /* Initialize howto table if needed. */
13438 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13439 ppc_howto_init ();
13440
13441 htab = ppc_hash_table (info);
13442 if (htab == NULL)
13443 return FALSE;
13444
13445 /* Don't relocate stub sections. */
13446 if (input_section->owner == htab->params->stub_bfd)
13447 return TRUE;
13448
13449 BFD_ASSERT (is_ppc64_elf (input_bfd));
13450
13451 local_got_ents = elf_local_got_ents (input_bfd);
13452 TOCstart = elf_gp (output_bfd);
13453 symtab_hdr = &elf_symtab_hdr (input_bfd);
13454 sym_hashes = elf_sym_hashes (input_bfd);
13455 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13456
13457 rel = wrel = relocs;
13458 relend = relocs + input_section->reloc_count;
13459 for (; rel < relend; wrel++, rel++)
13460 {
13461 enum elf_ppc64_reloc_type r_type;
13462 bfd_vma addend;
13463 bfd_reloc_status_type r;
13464 Elf_Internal_Sym *sym;
13465 asection *sec;
13466 struct elf_link_hash_entry *h_elf;
13467 struct ppc_link_hash_entry *h;
13468 struct ppc_link_hash_entry *fdh;
13469 const char *sym_name;
13470 unsigned long r_symndx, toc_symndx;
13471 bfd_vma toc_addend;
13472 unsigned char tls_mask, tls_gd, tls_type;
13473 unsigned char sym_type;
13474 bfd_vma relocation;
13475 bfd_boolean unresolved_reloc;
13476 bfd_boolean warned;
13477 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13478 unsigned int insn;
13479 unsigned int mask;
13480 struct ppc_stub_hash_entry *stub_entry;
13481 bfd_vma max_br_offset;
13482 bfd_vma from;
13483 Elf_Internal_Rela orig_rel;
13484 reloc_howto_type *howto;
13485 struct reloc_howto_struct alt_howto;
13486
13487 again:
13488 orig_rel = *rel;
13489
13490 r_type = ELF64_R_TYPE (rel->r_info);
13491 r_symndx = ELF64_R_SYM (rel->r_info);
13492
13493 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13494 symbol of the previous ADDR64 reloc. The symbol gives us the
13495 proper TOC base to use. */
13496 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13497 && wrel != relocs
13498 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13499 && is_opd)
13500 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13501
13502 sym = NULL;
13503 sec = NULL;
13504 h_elf = NULL;
13505 sym_name = NULL;
13506 unresolved_reloc = FALSE;
13507 warned = FALSE;
13508
13509 if (r_symndx < symtab_hdr->sh_info)
13510 {
13511 /* It's a local symbol. */
13512 struct _opd_sec_data *opd;
13513
13514 sym = local_syms + r_symndx;
13515 sec = local_sections[r_symndx];
13516 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13517 sym_type = ELF64_ST_TYPE (sym->st_info);
13518 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13519 opd = get_opd_info (sec);
13520 if (opd != NULL && opd->adjust != NULL)
13521 {
13522 long adjust = opd->adjust[OPD_NDX (sym->st_value
13523 + rel->r_addend)];
13524 if (adjust == -1)
13525 relocation = 0;
13526 else
13527 {
13528 /* If this is a relocation against the opd section sym
13529 and we have edited .opd, adjust the reloc addend so
13530 that ld -r and ld --emit-relocs output is correct.
13531 If it is a reloc against some other .opd symbol,
13532 then the symbol value will be adjusted later. */
13533 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13534 rel->r_addend += adjust;
13535 else
13536 relocation += adjust;
13537 }
13538 }
13539 }
13540 else
13541 {
13542 bfd_boolean ignored;
13543
13544 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13545 r_symndx, symtab_hdr, sym_hashes,
13546 h_elf, sec, relocation,
13547 unresolved_reloc, warned, ignored);
13548 sym_name = h_elf->root.root.string;
13549 sym_type = h_elf->type;
13550 if (sec != NULL
13551 && sec->owner == output_bfd
13552 && strcmp (sec->name, ".opd") == 0)
13553 {
13554 /* This is a symbol defined in a linker script. All
13555 such are defined in output sections, even those
13556 defined by simple assignment from a symbol defined in
13557 an input section. Transfer the symbol to an
13558 appropriate input .opd section, so that a branch to
13559 this symbol will be mapped to the location specified
13560 by the opd entry. */
13561 struct bfd_link_order *lo;
13562 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13563 if (lo->type == bfd_indirect_link_order)
13564 {
13565 asection *isec = lo->u.indirect.section;
13566 if (h_elf->root.u.def.value >= isec->output_offset
13567 && h_elf->root.u.def.value < (isec->output_offset
13568 + isec->size))
13569 {
13570 h_elf->root.u.def.value -= isec->output_offset;
13571 h_elf->root.u.def.section = isec;
13572 sec = isec;
13573 break;
13574 }
13575 }
13576 }
13577 }
13578 h = (struct ppc_link_hash_entry *) h_elf;
13579
13580 if (sec != NULL && discarded_section (sec))
13581 {
13582 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13583 input_bfd, input_section,
13584 contents + rel->r_offset);
13585 wrel->r_offset = rel->r_offset;
13586 wrel->r_info = 0;
13587 wrel->r_addend = 0;
13588
13589 /* For ld -r, remove relocations in debug sections against
13590 sections defined in discarded sections. Not done for
13591 non-debug to preserve relocs in .eh_frame which the
13592 eh_frame editing code expects to be present. */
13593 if (bfd_link_relocatable (info)
13594 && (input_section->flags & SEC_DEBUGGING))
13595 wrel--;
13596
13597 continue;
13598 }
13599
13600 if (bfd_link_relocatable (info))
13601 goto copy_reloc;
13602
13603 if (h != NULL && &h->elf == htab->elf.hgot)
13604 {
13605 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13606 sec = bfd_abs_section_ptr;
13607 unresolved_reloc = FALSE;
13608 }
13609
13610 /* TLS optimizations. Replace instruction sequences and relocs
13611 based on information we collected in tls_optimize. We edit
13612 RELOCS so that --emit-relocs will output something sensible
13613 for the final instruction stream. */
13614 tls_mask = 0;
13615 tls_gd = 0;
13616 toc_symndx = 0;
13617 if (h != NULL)
13618 tls_mask = h->tls_mask;
13619 else if (local_got_ents != NULL)
13620 {
13621 struct plt_entry **local_plt = (struct plt_entry **)
13622 (local_got_ents + symtab_hdr->sh_info);
13623 unsigned char *lgot_masks = (unsigned char *)
13624 (local_plt + symtab_hdr->sh_info);
13625 tls_mask = lgot_masks[r_symndx];
13626 }
13627 if (tls_mask == 0
13628 && (r_type == R_PPC64_TLS
13629 || r_type == R_PPC64_TLSGD
13630 || r_type == R_PPC64_TLSLD))
13631 {
13632 /* Check for toc tls entries. */
13633 unsigned char *toc_tls;
13634
13635 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13636 &local_syms, rel, input_bfd))
13637 return FALSE;
13638
13639 if (toc_tls)
13640 tls_mask = *toc_tls;
13641 }
13642
13643 /* Check that tls relocs are used with tls syms, and non-tls
13644 relocs are used with non-tls syms. */
13645 if (r_symndx != STN_UNDEF
13646 && r_type != R_PPC64_NONE
13647 && (h == NULL
13648 || h->elf.root.type == bfd_link_hash_defined
13649 || h->elf.root.type == bfd_link_hash_defweak)
13650 && (IS_PPC64_TLS_RELOC (r_type)
13651 != (sym_type == STT_TLS
13652 || (sym_type == STT_SECTION
13653 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13654 {
13655 if (tls_mask != 0
13656 && (r_type == R_PPC64_TLS
13657 || r_type == R_PPC64_TLSGD
13658 || r_type == R_PPC64_TLSLD))
13659 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13660 ;
13661 else
13662 info->callbacks->einfo
13663 (!IS_PPC64_TLS_RELOC (r_type)
13664 /* xgettext:c-format */
13665 ? _("%H: %s used with TLS symbol `%T'\n")
13666 /* xgettext:c-format */
13667 : _("%H: %s used with non-TLS symbol `%T'\n"),
13668 input_bfd, input_section, rel->r_offset,
13669 ppc64_elf_howto_table[r_type]->name,
13670 sym_name);
13671 }
13672
13673 /* Ensure reloc mapping code below stays sane. */
13674 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13675 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13676 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13677 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13678 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13679 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13680 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13681 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13682 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13683 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13684 abort ();
13685
13686 switch (r_type)
13687 {
13688 default:
13689 break;
13690
13691 case R_PPC64_LO_DS_OPT:
13692 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13693 if ((insn & (0x3f << 26)) != 58u << 26)
13694 abort ();
13695 insn += (14u << 26) - (58u << 26);
13696 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13697 r_type = R_PPC64_TOC16_LO;
13698 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13699 break;
13700
13701 case R_PPC64_TOC16:
13702 case R_PPC64_TOC16_LO:
13703 case R_PPC64_TOC16_DS:
13704 case R_PPC64_TOC16_LO_DS:
13705 {
13706 /* Check for toc tls entries. */
13707 unsigned char *toc_tls;
13708 int retval;
13709
13710 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13711 &local_syms, rel, input_bfd);
13712 if (retval == 0)
13713 return FALSE;
13714
13715 if (toc_tls)
13716 {
13717 tls_mask = *toc_tls;
13718 if (r_type == R_PPC64_TOC16_DS
13719 || r_type == R_PPC64_TOC16_LO_DS)
13720 {
13721 if (tls_mask != 0
13722 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13723 goto toctprel;
13724 }
13725 else
13726 {
13727 /* If we found a GD reloc pair, then we might be
13728 doing a GD->IE transition. */
13729 if (retval == 2)
13730 {
13731 tls_gd = TLS_TPRELGD;
13732 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13733 goto tls_ldgd_opt;
13734 }
13735 else if (retval == 3)
13736 {
13737 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13738 goto tls_ldgd_opt;
13739 }
13740 }
13741 }
13742 }
13743 break;
13744
13745 case R_PPC64_GOT_TPREL16_HI:
13746 case R_PPC64_GOT_TPREL16_HA:
13747 if (tls_mask != 0
13748 && (tls_mask & TLS_TPREL) == 0)
13749 {
13750 rel->r_offset -= d_offset;
13751 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13752 r_type = R_PPC64_NONE;
13753 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13754 }
13755 break;
13756
13757 case R_PPC64_GOT_TPREL16_DS:
13758 case R_PPC64_GOT_TPREL16_LO_DS:
13759 if (tls_mask != 0
13760 && (tls_mask & TLS_TPREL) == 0)
13761 {
13762 toctprel:
13763 insn = bfd_get_32 (input_bfd,
13764 contents + rel->r_offset - d_offset);
13765 insn &= 31 << 21;
13766 insn |= 0x3c0d0000; /* addis 0,13,0 */
13767 bfd_put_32 (input_bfd, insn,
13768 contents + rel->r_offset - d_offset);
13769 r_type = R_PPC64_TPREL16_HA;
13770 if (toc_symndx != 0)
13771 {
13772 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13773 rel->r_addend = toc_addend;
13774 /* We changed the symbol. Start over in order to
13775 get h, sym, sec etc. right. */
13776 goto again;
13777 }
13778 else
13779 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13780 }
13781 break;
13782
13783 case R_PPC64_TLS:
13784 if (tls_mask != 0
13785 && (tls_mask & TLS_TPREL) == 0)
13786 {
13787 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13788 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13789 if (insn == 0)
13790 abort ();
13791 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13792 /* Was PPC64_TLS which sits on insn boundary, now
13793 PPC64_TPREL16_LO which is at low-order half-word. */
13794 rel->r_offset += d_offset;
13795 r_type = R_PPC64_TPREL16_LO;
13796 if (toc_symndx != 0)
13797 {
13798 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13799 rel->r_addend = toc_addend;
13800 /* We changed the symbol. Start over in order to
13801 get h, sym, sec etc. right. */
13802 goto again;
13803 }
13804 else
13805 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13806 }
13807 break;
13808
13809 case R_PPC64_GOT_TLSGD16_HI:
13810 case R_PPC64_GOT_TLSGD16_HA:
13811 tls_gd = TLS_TPRELGD;
13812 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13813 goto tls_gdld_hi;
13814 break;
13815
13816 case R_PPC64_GOT_TLSLD16_HI:
13817 case R_PPC64_GOT_TLSLD16_HA:
13818 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13819 {
13820 tls_gdld_hi:
13821 if ((tls_mask & tls_gd) != 0)
13822 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13823 + R_PPC64_GOT_TPREL16_DS);
13824 else
13825 {
13826 rel->r_offset -= d_offset;
13827 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13828 r_type = R_PPC64_NONE;
13829 }
13830 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13831 }
13832 break;
13833
13834 case R_PPC64_GOT_TLSGD16:
13835 case R_PPC64_GOT_TLSGD16_LO:
13836 tls_gd = TLS_TPRELGD;
13837 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13838 goto tls_ldgd_opt;
13839 break;
13840
13841 case R_PPC64_GOT_TLSLD16:
13842 case R_PPC64_GOT_TLSLD16_LO:
13843 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13844 {
13845 unsigned int insn1, insn2, insn3;
13846 bfd_vma offset;
13847
13848 tls_ldgd_opt:
13849 offset = (bfd_vma) -1;
13850 /* If not using the newer R_PPC64_TLSGD/LD to mark
13851 __tls_get_addr calls, we must trust that the call
13852 stays with its arg setup insns, ie. that the next
13853 reloc is the __tls_get_addr call associated with
13854 the current reloc. Edit both insns. */
13855 if (input_section->has_tls_get_addr_call
13856 && rel + 1 < relend
13857 && branch_reloc_hash_match (input_bfd, rel + 1,
13858 htab->tls_get_addr,
13859 htab->tls_get_addr_fd))
13860 offset = rel[1].r_offset;
13861 /* We read the low GOT_TLS (or TOC16) insn because we
13862 need to keep the destination reg. It may be
13863 something other than the usual r3, and moved to r3
13864 before the call by intervening code. */
13865 insn1 = bfd_get_32 (input_bfd,
13866 contents + rel->r_offset - d_offset);
13867 if ((tls_mask & tls_gd) != 0)
13868 {
13869 /* IE */
13870 insn1 &= (0x1f << 21) | (0x1f << 16);
13871 insn1 |= 58 << 26; /* ld */
13872 insn2 = 0x7c636a14; /* add 3,3,13 */
13873 if (offset != (bfd_vma) -1)
13874 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13875 if ((tls_mask & TLS_EXPLICIT) == 0)
13876 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13877 + R_PPC64_GOT_TPREL16_DS);
13878 else
13879 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13880 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13881 }
13882 else
13883 {
13884 /* LE */
13885 insn1 &= 0x1f << 21;
13886 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13887 insn2 = 0x38630000; /* addi 3,3,0 */
13888 if (tls_gd == 0)
13889 {
13890 /* Was an LD reloc. */
13891 if (toc_symndx)
13892 sec = local_sections[toc_symndx];
13893 for (r_symndx = 0;
13894 r_symndx < symtab_hdr->sh_info;
13895 r_symndx++)
13896 if (local_sections[r_symndx] == sec)
13897 break;
13898 if (r_symndx >= symtab_hdr->sh_info)
13899 r_symndx = STN_UNDEF;
13900 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13901 if (r_symndx != STN_UNDEF)
13902 rel->r_addend -= (local_syms[r_symndx].st_value
13903 + sec->output_offset
13904 + sec->output_section->vma);
13905 }
13906 else if (toc_symndx != 0)
13907 {
13908 r_symndx = toc_symndx;
13909 rel->r_addend = toc_addend;
13910 }
13911 r_type = R_PPC64_TPREL16_HA;
13912 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13913 if (offset != (bfd_vma) -1)
13914 {
13915 rel[1].r_info = ELF64_R_INFO (r_symndx,
13916 R_PPC64_TPREL16_LO);
13917 rel[1].r_offset = offset + d_offset;
13918 rel[1].r_addend = rel->r_addend;
13919 }
13920 }
13921 bfd_put_32 (input_bfd, insn1,
13922 contents + rel->r_offset - d_offset);
13923 if (offset != (bfd_vma) -1)
13924 {
13925 insn3 = bfd_get_32 (input_bfd,
13926 contents + offset + 4);
13927 if (insn3 == NOP
13928 || insn3 == CROR_151515 || insn3 == CROR_313131)
13929 {
13930 rel[1].r_offset += 4;
13931 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13932 insn2 = NOP;
13933 }
13934 bfd_put_32 (input_bfd, insn2, contents + offset);
13935 }
13936 if ((tls_mask & tls_gd) == 0
13937 && (tls_gd == 0 || toc_symndx != 0))
13938 {
13939 /* We changed the symbol. Start over in order
13940 to get h, sym, sec etc. right. */
13941 goto again;
13942 }
13943 }
13944 break;
13945
13946 case R_PPC64_TLSGD:
13947 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13948 {
13949 unsigned int insn2, insn3;
13950 bfd_vma offset = rel->r_offset;
13951
13952 if ((tls_mask & TLS_TPRELGD) != 0)
13953 {
13954 /* IE */
13955 r_type = R_PPC64_NONE;
13956 insn2 = 0x7c636a14; /* add 3,3,13 */
13957 }
13958 else
13959 {
13960 /* LE */
13961 if (toc_symndx != 0)
13962 {
13963 r_symndx = toc_symndx;
13964 rel->r_addend = toc_addend;
13965 }
13966 r_type = R_PPC64_TPREL16_LO;
13967 rel->r_offset = offset + d_offset;
13968 insn2 = 0x38630000; /* addi 3,3,0 */
13969 }
13970 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13971 /* Zap the reloc on the _tls_get_addr call too. */
13972 BFD_ASSERT (offset == rel[1].r_offset);
13973 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13974 insn3 = bfd_get_32 (input_bfd,
13975 contents + offset + 4);
13976 if (insn3 == NOP
13977 || insn3 == CROR_151515 || insn3 == CROR_313131)
13978 {
13979 rel->r_offset += 4;
13980 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13981 insn2 = NOP;
13982 }
13983 bfd_put_32 (input_bfd, insn2, contents + offset);
13984 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13985 goto again;
13986 }
13987 break;
13988
13989 case R_PPC64_TLSLD:
13990 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13991 {
13992 unsigned int insn2, insn3;
13993 bfd_vma offset = rel->r_offset;
13994
13995 if (toc_symndx)
13996 sec = local_sections[toc_symndx];
13997 for (r_symndx = 0;
13998 r_symndx < symtab_hdr->sh_info;
13999 r_symndx++)
14000 if (local_sections[r_symndx] == sec)
14001 break;
14002 if (r_symndx >= symtab_hdr->sh_info)
14003 r_symndx = STN_UNDEF;
14004 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14005 if (r_symndx != STN_UNDEF)
14006 rel->r_addend -= (local_syms[r_symndx].st_value
14007 + sec->output_offset
14008 + sec->output_section->vma);
14009
14010 r_type = R_PPC64_TPREL16_LO;
14011 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14012 rel->r_offset = offset + d_offset;
14013 /* Zap the reloc on the _tls_get_addr call too. */
14014 BFD_ASSERT (offset == rel[1].r_offset);
14015 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14016 insn2 = 0x38630000; /* addi 3,3,0 */
14017 insn3 = bfd_get_32 (input_bfd,
14018 contents + offset + 4);
14019 if (insn3 == NOP
14020 || insn3 == CROR_151515 || insn3 == CROR_313131)
14021 {
14022 rel->r_offset += 4;
14023 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
14024 insn2 = NOP;
14025 }
14026 bfd_put_32 (input_bfd, insn2, contents + offset);
14027 goto again;
14028 }
14029 break;
14030
14031 case R_PPC64_DTPMOD64:
14032 if (rel + 1 < relend
14033 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
14034 && rel[1].r_offset == rel->r_offset + 8)
14035 {
14036 if ((tls_mask & TLS_GD) == 0)
14037 {
14038 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
14039 if ((tls_mask & TLS_TPRELGD) != 0)
14040 r_type = R_PPC64_TPREL64;
14041 else
14042 {
14043 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14044 r_type = R_PPC64_NONE;
14045 }
14046 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14047 }
14048 }
14049 else
14050 {
14051 if ((tls_mask & TLS_LD) == 0)
14052 {
14053 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14054 r_type = R_PPC64_NONE;
14055 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14056 }
14057 }
14058 break;
14059
14060 case R_PPC64_TPREL64:
14061 if ((tls_mask & TLS_TPREL) == 0)
14062 {
14063 r_type = R_PPC64_NONE;
14064 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14065 }
14066 break;
14067
14068 case R_PPC64_ENTRY:
14069 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14070 if (!bfd_link_pic (info)
14071 && !info->traditional_format
14072 && relocation + 0x80008000 <= 0xffffffff)
14073 {
14074 unsigned int insn1, insn2;
14075
14076 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14077 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14078 if ((insn1 & ~0xfffc) == LD_R2_0R12
14079 && insn2 == ADD_R2_R2_R12)
14080 {
14081 bfd_put_32 (input_bfd,
14082 LIS_R2 + PPC_HA (relocation),
14083 contents + rel->r_offset);
14084 bfd_put_32 (input_bfd,
14085 ADDI_R2_R2 + PPC_LO (relocation),
14086 contents + rel->r_offset + 4);
14087 }
14088 }
14089 else
14090 {
14091 relocation -= (rel->r_offset
14092 + input_section->output_offset
14093 + input_section->output_section->vma);
14094 if (relocation + 0x80008000 <= 0xffffffff)
14095 {
14096 unsigned int insn1, insn2;
14097
14098 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14099 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14100 if ((insn1 & ~0xfffc) == LD_R2_0R12
14101 && insn2 == ADD_R2_R2_R12)
14102 {
14103 bfd_put_32 (input_bfd,
14104 ADDIS_R2_R12 + PPC_HA (relocation),
14105 contents + rel->r_offset);
14106 bfd_put_32 (input_bfd,
14107 ADDI_R2_R2 + PPC_LO (relocation),
14108 contents + rel->r_offset + 4);
14109 }
14110 }
14111 }
14112 break;
14113
14114 case R_PPC64_REL16_HA:
14115 /* If we are generating a non-PIC executable, edit
14116 . 0: addis 2,12,.TOC.-0b@ha
14117 . addi 2,2,.TOC.-0b@l
14118 used by ELFv2 global entry points to set up r2, to
14119 . lis 2,.TOC.@ha
14120 . addi 2,2,.TOC.@l
14121 if .TOC. is in range. */
14122 if (!bfd_link_pic (info)
14123 && !info->traditional_format
14124 && !htab->opd_abi
14125 && rel->r_addend == d_offset
14126 && h != NULL && &h->elf == htab->elf.hgot
14127 && rel + 1 < relend
14128 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14129 && rel[1].r_offset == rel->r_offset + 4
14130 && rel[1].r_addend == rel->r_addend + 4
14131 && relocation + 0x80008000 <= 0xffffffff)
14132 {
14133 unsigned int insn1, insn2;
14134 bfd_vma offset = rel->r_offset - d_offset;
14135 insn1 = bfd_get_32 (input_bfd, contents + offset);
14136 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14137 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14138 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14139 {
14140 r_type = R_PPC64_ADDR16_HA;
14141 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14142 rel->r_addend -= d_offset;
14143 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14144 rel[1].r_addend -= d_offset + 4;
14145 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14146 }
14147 }
14148 break;
14149 }
14150
14151 /* Handle other relocations that tweak non-addend part of insn. */
14152 insn = 0;
14153 max_br_offset = 1 << 25;
14154 addend = rel->r_addend;
14155 reloc_dest = DEST_NORMAL;
14156 switch (r_type)
14157 {
14158 default:
14159 break;
14160
14161 case R_PPC64_TOCSAVE:
14162 if (relocation + addend == (rel->r_offset
14163 + input_section->output_offset
14164 + input_section->output_section->vma)
14165 && tocsave_find (htab, NO_INSERT,
14166 &local_syms, rel, input_bfd))
14167 {
14168 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14169 if (insn == NOP
14170 || insn == CROR_151515 || insn == CROR_313131)
14171 bfd_put_32 (input_bfd,
14172 STD_R2_0R1 + STK_TOC (htab),
14173 contents + rel->r_offset);
14174 }
14175 break;
14176
14177 /* Branch taken prediction relocations. */
14178 case R_PPC64_ADDR14_BRTAKEN:
14179 case R_PPC64_REL14_BRTAKEN:
14180 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14181 /* Fall through. */
14182
14183 /* Branch not taken prediction relocations. */
14184 case R_PPC64_ADDR14_BRNTAKEN:
14185 case R_PPC64_REL14_BRNTAKEN:
14186 insn |= bfd_get_32 (input_bfd,
14187 contents + rel->r_offset) & ~(0x01 << 21);
14188 /* Fall through. */
14189
14190 case R_PPC64_REL14:
14191 max_br_offset = 1 << 15;
14192 /* Fall through. */
14193
14194 case R_PPC64_REL24:
14195 /* Calls to functions with a different TOC, such as calls to
14196 shared objects, need to alter the TOC pointer. This is
14197 done using a linkage stub. A REL24 branching to these
14198 linkage stubs needs to be followed by a nop, as the nop
14199 will be replaced with an instruction to restore the TOC
14200 base pointer. */
14201 fdh = h;
14202 if (h != NULL
14203 && h->oh != NULL
14204 && h->oh->is_func_descriptor)
14205 fdh = ppc_follow_link (h->oh);
14206 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14207 htab);
14208 if (stub_entry != NULL
14209 && (stub_entry->stub_type == ppc_stub_plt_call
14210 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14211 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14212 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14213 {
14214 bfd_boolean can_plt_call = FALSE;
14215
14216 if (stub_entry->stub_type == ppc_stub_plt_call
14217 && !htab->opd_abi
14218 && htab->params->plt_localentry0 != 0
14219 && is_elfv2_localentry0 (&h->elf))
14220 {
14221 /* The function doesn't use or change r2. */
14222 can_plt_call = TRUE;
14223 }
14224
14225 /* All of these stubs may modify r2, so there must be a
14226 branch and link followed by a nop. The nop is
14227 replaced by an insn to restore r2. */
14228 else if (rel->r_offset + 8 <= input_section->size)
14229 {
14230 unsigned long br;
14231
14232 br = bfd_get_32 (input_bfd,
14233 contents + rel->r_offset);
14234 if ((br & 1) != 0)
14235 {
14236 unsigned long nop;
14237
14238 nop = bfd_get_32 (input_bfd,
14239 contents + rel->r_offset + 4);
14240 if (nop == NOP
14241 || nop == CROR_151515 || nop == CROR_313131)
14242 {
14243 if (h != NULL
14244 && (h == htab->tls_get_addr_fd
14245 || h == htab->tls_get_addr)
14246 && htab->params->tls_get_addr_opt)
14247 {
14248 /* Special stub used, leave nop alone. */
14249 }
14250 else
14251 bfd_put_32 (input_bfd,
14252 LD_R2_0R1 + STK_TOC (htab),
14253 contents + rel->r_offset + 4);
14254 can_plt_call = TRUE;
14255 }
14256 }
14257 }
14258
14259 if (!can_plt_call && h != NULL)
14260 {
14261 const char *name = h->elf.root.root.string;
14262
14263 if (*name == '.')
14264 ++name;
14265
14266 if (strncmp (name, "__libc_start_main", 17) == 0
14267 && (name[17] == 0 || name[17] == '@'))
14268 {
14269 /* Allow crt1 branch to go via a toc adjusting
14270 stub. Other calls that never return could do
14271 the same, if we could detect such. */
14272 can_plt_call = TRUE;
14273 }
14274 }
14275
14276 if (!can_plt_call)
14277 {
14278 /* g++ as of 20130507 emits self-calls without a
14279 following nop. This is arguably wrong since we
14280 have conflicting information. On the one hand a
14281 global symbol and on the other a local call
14282 sequence, but don't error for this special case.
14283 It isn't possible to cheaply verify we have
14284 exactly such a call. Allow all calls to the same
14285 section. */
14286 asection *code_sec = sec;
14287
14288 if (get_opd_info (sec) != NULL)
14289 {
14290 bfd_vma off = (relocation + addend
14291 - sec->output_section->vma
14292 - sec->output_offset);
14293
14294 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14295 }
14296 if (code_sec == input_section)
14297 can_plt_call = TRUE;
14298 }
14299
14300 if (!can_plt_call)
14301 {
14302 if (stub_entry->stub_type == ppc_stub_plt_call
14303 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14304 info->callbacks->einfo
14305 /* xgettext:c-format */
14306 (_("%H: call to `%T' lacks nop, can't restore toc; "
14307 "recompile with -fPIC\n"),
14308 input_bfd, input_section, rel->r_offset, sym_name);
14309 else
14310 info->callbacks->einfo
14311 /* xgettext:c-format */
14312 (_("%H: call to `%T' lacks nop, can't restore toc; "
14313 "(-mcmodel=small toc adjust stub)\n"),
14314 input_bfd, input_section, rel->r_offset, sym_name);
14315
14316 bfd_set_error (bfd_error_bad_value);
14317 ret = FALSE;
14318 }
14319
14320 if (can_plt_call
14321 && (stub_entry->stub_type == ppc_stub_plt_call
14322 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14323 unresolved_reloc = FALSE;
14324 }
14325
14326 if ((stub_entry == NULL
14327 || stub_entry->stub_type == ppc_stub_long_branch
14328 || stub_entry->stub_type == ppc_stub_plt_branch)
14329 && get_opd_info (sec) != NULL)
14330 {
14331 /* The branch destination is the value of the opd entry. */
14332 bfd_vma off = (relocation + addend
14333 - sec->output_section->vma
14334 - sec->output_offset);
14335 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14336 if (dest != (bfd_vma) -1)
14337 {
14338 relocation = dest;
14339 addend = 0;
14340 reloc_dest = DEST_OPD;
14341 }
14342 }
14343
14344 /* If the branch is out of reach we ought to have a long
14345 branch stub. */
14346 from = (rel->r_offset
14347 + input_section->output_offset
14348 + input_section->output_section->vma);
14349
14350 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14351 ? fdh->elf.other
14352 : sym->st_other);
14353
14354 if (stub_entry != NULL
14355 && (stub_entry->stub_type == ppc_stub_long_branch
14356 || stub_entry->stub_type == ppc_stub_plt_branch)
14357 && (r_type == R_PPC64_ADDR14_BRTAKEN
14358 || r_type == R_PPC64_ADDR14_BRNTAKEN
14359 || (relocation + addend - from + max_br_offset
14360 < 2 * max_br_offset)))
14361 /* Don't use the stub if this branch is in range. */
14362 stub_entry = NULL;
14363
14364 if (stub_entry != NULL)
14365 {
14366 /* Munge up the value and addend so that we call the stub
14367 rather than the procedure directly. */
14368 asection *stub_sec = stub_entry->group->stub_sec;
14369
14370 if (stub_entry->stub_type == ppc_stub_save_res)
14371 relocation += (stub_sec->output_offset
14372 + stub_sec->output_section->vma
14373 + stub_sec->size - htab->sfpr->size
14374 - htab->sfpr->output_offset
14375 - htab->sfpr->output_section->vma);
14376 else
14377 relocation = (stub_entry->stub_offset
14378 + stub_sec->output_offset
14379 + stub_sec->output_section->vma);
14380 addend = 0;
14381 reloc_dest = DEST_STUB;
14382
14383 if ((stub_entry->stub_type == ppc_stub_plt_call
14384 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14385 && (ALWAYS_EMIT_R2SAVE
14386 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14387 && rel + 1 < relend
14388 && rel[1].r_offset == rel->r_offset + 4
14389 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14390 relocation += 4;
14391 }
14392
14393 if (insn != 0)
14394 {
14395 if (is_isa_v2)
14396 {
14397 /* Set 'a' bit. This is 0b00010 in BO field for branch
14398 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14399 for branch on CTR insns (BO == 1a00t or 1a01t). */
14400 if ((insn & (0x14 << 21)) == (0x04 << 21))
14401 insn |= 0x02 << 21;
14402 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14403 insn |= 0x08 << 21;
14404 else
14405 break;
14406 }
14407 else
14408 {
14409 /* Invert 'y' bit if not the default. */
14410 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14411 insn ^= 0x01 << 21;
14412 }
14413
14414 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14415 }
14416
14417 /* NOP out calls to undefined weak functions.
14418 We can thus call a weak function without first
14419 checking whether the function is defined. */
14420 else if (h != NULL
14421 && h->elf.root.type == bfd_link_hash_undefweak
14422 && h->elf.dynindx == -1
14423 && r_type == R_PPC64_REL24
14424 && relocation == 0
14425 && addend == 0)
14426 {
14427 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14428 goto copy_reloc;
14429 }
14430 break;
14431 }
14432
14433 /* Set `addend'. */
14434 tls_type = 0;
14435 switch (r_type)
14436 {
14437 default:
14438 info->callbacks->einfo
14439 /* xgettext:c-format */
14440 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14441 input_bfd, (int) r_type, sym_name);
14442
14443 bfd_set_error (bfd_error_bad_value);
14444 ret = FALSE;
14445 goto copy_reloc;
14446
14447 case R_PPC64_NONE:
14448 case R_PPC64_TLS:
14449 case R_PPC64_TLSGD:
14450 case R_PPC64_TLSLD:
14451 case R_PPC64_TOCSAVE:
14452 case R_PPC64_GNU_VTINHERIT:
14453 case R_PPC64_GNU_VTENTRY:
14454 case R_PPC64_ENTRY:
14455 goto copy_reloc;
14456
14457 /* GOT16 relocations. Like an ADDR16 using the symbol's
14458 address in the GOT as relocation value instead of the
14459 symbol's value itself. Also, create a GOT entry for the
14460 symbol and put the symbol value there. */
14461 case R_PPC64_GOT_TLSGD16:
14462 case R_PPC64_GOT_TLSGD16_LO:
14463 case R_PPC64_GOT_TLSGD16_HI:
14464 case R_PPC64_GOT_TLSGD16_HA:
14465 tls_type = TLS_TLS | TLS_GD;
14466 goto dogot;
14467
14468 case R_PPC64_GOT_TLSLD16:
14469 case R_PPC64_GOT_TLSLD16_LO:
14470 case R_PPC64_GOT_TLSLD16_HI:
14471 case R_PPC64_GOT_TLSLD16_HA:
14472 tls_type = TLS_TLS | TLS_LD;
14473 goto dogot;
14474
14475 case R_PPC64_GOT_TPREL16_DS:
14476 case R_PPC64_GOT_TPREL16_LO_DS:
14477 case R_PPC64_GOT_TPREL16_HI:
14478 case R_PPC64_GOT_TPREL16_HA:
14479 tls_type = TLS_TLS | TLS_TPREL;
14480 goto dogot;
14481
14482 case R_PPC64_GOT_DTPREL16_DS:
14483 case R_PPC64_GOT_DTPREL16_LO_DS:
14484 case R_PPC64_GOT_DTPREL16_HI:
14485 case R_PPC64_GOT_DTPREL16_HA:
14486 tls_type = TLS_TLS | TLS_DTPREL;
14487 goto dogot;
14488
14489 case R_PPC64_GOT16:
14490 case R_PPC64_GOT16_LO:
14491 case R_PPC64_GOT16_HI:
14492 case R_PPC64_GOT16_HA:
14493 case R_PPC64_GOT16_DS:
14494 case R_PPC64_GOT16_LO_DS:
14495 dogot:
14496 {
14497 /* Relocation is to the entry for this symbol in the global
14498 offset table. */
14499 asection *got;
14500 bfd_vma *offp;
14501 bfd_vma off;
14502 unsigned long indx = 0;
14503 struct got_entry *ent;
14504
14505 if (tls_type == (TLS_TLS | TLS_LD)
14506 && (h == NULL
14507 || !h->elf.def_dynamic))
14508 ent = ppc64_tlsld_got (input_bfd);
14509 else
14510 {
14511 if (h != NULL)
14512 {
14513 if (!htab->elf.dynamic_sections_created
14514 || h->elf.dynindx == -1
14515 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14516 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14517 /* This is actually a static link, or it is a
14518 -Bsymbolic link and the symbol is defined
14519 locally, or the symbol was forced to be local
14520 because of a version file. */
14521 ;
14522 else
14523 {
14524 indx = h->elf.dynindx;
14525 unresolved_reloc = FALSE;
14526 }
14527 ent = h->elf.got.glist;
14528 }
14529 else
14530 {
14531 if (local_got_ents == NULL)
14532 abort ();
14533 ent = local_got_ents[r_symndx];
14534 }
14535
14536 for (; ent != NULL; ent = ent->next)
14537 if (ent->addend == orig_rel.r_addend
14538 && ent->owner == input_bfd
14539 && ent->tls_type == tls_type)
14540 break;
14541 }
14542
14543 if (ent == NULL)
14544 abort ();
14545 if (ent->is_indirect)
14546 ent = ent->got.ent;
14547 offp = &ent->got.offset;
14548 got = ppc64_elf_tdata (ent->owner)->got;
14549 if (got == NULL)
14550 abort ();
14551
14552 /* The offset must always be a multiple of 8. We use the
14553 least significant bit to record whether we have already
14554 processed this entry. */
14555 off = *offp;
14556 if ((off & 1) != 0)
14557 off &= ~1;
14558 else
14559 {
14560 /* Generate relocs for the dynamic linker, except in
14561 the case of TLSLD where we'll use one entry per
14562 module. */
14563 asection *relgot;
14564 bfd_boolean ifunc;
14565
14566 *offp = off | 1;
14567 relgot = NULL;
14568 ifunc = (h != NULL
14569 ? h->elf.type == STT_GNU_IFUNC
14570 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14571 if (ifunc)
14572 {
14573 relgot = htab->elf.irelplt;
14574 if (indx == 0)
14575 htab->local_ifunc_resolver = 1;
14576 else if (is_static_defined (&h->elf))
14577 htab->maybe_local_ifunc_resolver = 1;
14578 }
14579 else if (indx != 0
14580 || (bfd_link_pic (info)
14581 && (h == NULL
14582 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14583 || (tls_type == (TLS_TLS | TLS_LD)
14584 && !h->elf.def_dynamic))))
14585 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14586 if (relgot != NULL)
14587 {
14588 outrel.r_offset = (got->output_section->vma
14589 + got->output_offset
14590 + off);
14591 outrel.r_addend = addend;
14592 if (tls_type & (TLS_LD | TLS_GD))
14593 {
14594 outrel.r_addend = 0;
14595 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14596 if (tls_type == (TLS_TLS | TLS_GD))
14597 {
14598 loc = relgot->contents;
14599 loc += (relgot->reloc_count++
14600 * sizeof (Elf64_External_Rela));
14601 bfd_elf64_swap_reloca_out (output_bfd,
14602 &outrel, loc);
14603 outrel.r_offset += 8;
14604 outrel.r_addend = addend;
14605 outrel.r_info
14606 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14607 }
14608 }
14609 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14610 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14611 else if (tls_type == (TLS_TLS | TLS_TPREL))
14612 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14613 else if (indx != 0)
14614 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14615 else
14616 {
14617 if (ifunc)
14618 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14619 else
14620 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14621
14622 /* Write the .got section contents for the sake
14623 of prelink. */
14624 loc = got->contents + off;
14625 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14626 loc);
14627 }
14628
14629 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14630 {
14631 outrel.r_addend += relocation;
14632 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14633 {
14634 if (htab->elf.tls_sec == NULL)
14635 outrel.r_addend = 0;
14636 else
14637 outrel.r_addend -= htab->elf.tls_sec->vma;
14638 }
14639 }
14640 loc = relgot->contents;
14641 loc += (relgot->reloc_count++
14642 * sizeof (Elf64_External_Rela));
14643 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14644 }
14645
14646 /* Init the .got section contents here if we're not
14647 emitting a reloc. */
14648 else
14649 {
14650 int tlsopt
14651 = (htab->params->tls_get_addr_opt
14652 && htab->tls_get_addr_fd != NULL
14653 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
14654
14655 relocation += addend;
14656 if (tls_type != 0)
14657 {
14658 if (htab->elf.tls_sec == NULL)
14659 relocation = 0;
14660 else
14661 {
14662 if (tls_type & TLS_LD)
14663 relocation = 0;
14664 else
14665 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14666 if ((tls_type & TLS_TPREL)
14667 || (tlsopt && !(tls_type & TLS_DTPREL)))
14668 relocation += DTP_OFFSET - TP_OFFSET;
14669 }
14670
14671 if (tls_type & (TLS_GD | TLS_LD))
14672 {
14673 bfd_put_64 (output_bfd, relocation,
14674 got->contents + off + 8);
14675 relocation = !tlsopt;
14676 }
14677 }
14678 bfd_put_64 (output_bfd, relocation,
14679 got->contents + off);
14680 }
14681 }
14682
14683 if (off >= (bfd_vma) -2)
14684 abort ();
14685
14686 relocation = got->output_section->vma + got->output_offset + off;
14687 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14688 }
14689 break;
14690
14691 case R_PPC64_PLT16_HA:
14692 case R_PPC64_PLT16_HI:
14693 case R_PPC64_PLT16_LO:
14694 case R_PPC64_PLT32:
14695 case R_PPC64_PLT64:
14696 /* Relocation is to the entry for this symbol in the
14697 procedure linkage table. */
14698 {
14699 struct plt_entry **plt_list = NULL;
14700 if (h != NULL)
14701 plt_list = &h->elf.plt.plist;
14702 else if (local_got_ents != NULL)
14703 {
14704 struct plt_entry **local_plt = (struct plt_entry **)
14705 (local_got_ents + symtab_hdr->sh_info);
14706 unsigned char *local_got_tls_masks = (unsigned char *)
14707 (local_plt + symtab_hdr->sh_info);
14708 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14709 plt_list = local_plt + r_symndx;
14710 }
14711 if (plt_list)
14712 {
14713 struct plt_entry *ent;
14714
14715 for (ent = *plt_list; ent != NULL; ent = ent->next)
14716 if (ent->plt.offset != (bfd_vma) -1
14717 && ent->addend == orig_rel.r_addend)
14718 {
14719 asection *plt;
14720
14721 plt = htab->elf.splt;
14722 if (!htab->elf.dynamic_sections_created
14723 || h == NULL
14724 || h->elf.dynindx == -1)
14725 plt = htab->elf.iplt;
14726 relocation = (plt->output_section->vma
14727 + plt->output_offset
14728 + ent->plt.offset);
14729 addend = 0;
14730 unresolved_reloc = FALSE;
14731 break;
14732 }
14733 }
14734 }
14735 break;
14736
14737 case R_PPC64_TOC:
14738 /* Relocation value is TOC base. */
14739 relocation = TOCstart;
14740 if (r_symndx == STN_UNDEF)
14741 relocation += htab->sec_info[input_section->id].toc_off;
14742 else if (unresolved_reloc)
14743 ;
14744 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14745 relocation += htab->sec_info[sec->id].toc_off;
14746 else
14747 unresolved_reloc = TRUE;
14748 goto dodyn;
14749
14750 /* TOC16 relocs. We want the offset relative to the TOC base,
14751 which is the address of the start of the TOC plus 0x8000.
14752 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14753 in this order. */
14754 case R_PPC64_TOC16:
14755 case R_PPC64_TOC16_LO:
14756 case R_PPC64_TOC16_HI:
14757 case R_PPC64_TOC16_DS:
14758 case R_PPC64_TOC16_LO_DS:
14759 case R_PPC64_TOC16_HA:
14760 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14761 break;
14762
14763 /* Relocate against the beginning of the section. */
14764 case R_PPC64_SECTOFF:
14765 case R_PPC64_SECTOFF_LO:
14766 case R_PPC64_SECTOFF_HI:
14767 case R_PPC64_SECTOFF_DS:
14768 case R_PPC64_SECTOFF_LO_DS:
14769 case R_PPC64_SECTOFF_HA:
14770 if (sec != NULL)
14771 addend -= sec->output_section->vma;
14772 break;
14773
14774 case R_PPC64_REL16:
14775 case R_PPC64_REL16_LO:
14776 case R_PPC64_REL16_HI:
14777 case R_PPC64_REL16_HA:
14778 case R_PPC64_REL16DX_HA:
14779 break;
14780
14781 case R_PPC64_REL14:
14782 case R_PPC64_REL14_BRNTAKEN:
14783 case R_PPC64_REL14_BRTAKEN:
14784 case R_PPC64_REL24:
14785 break;
14786
14787 case R_PPC64_TPREL16:
14788 case R_PPC64_TPREL16_LO:
14789 case R_PPC64_TPREL16_HI:
14790 case R_PPC64_TPREL16_HA:
14791 case R_PPC64_TPREL16_DS:
14792 case R_PPC64_TPREL16_LO_DS:
14793 case R_PPC64_TPREL16_HIGH:
14794 case R_PPC64_TPREL16_HIGHA:
14795 case R_PPC64_TPREL16_HIGHER:
14796 case R_PPC64_TPREL16_HIGHERA:
14797 case R_PPC64_TPREL16_HIGHEST:
14798 case R_PPC64_TPREL16_HIGHESTA:
14799 if (h != NULL
14800 && h->elf.root.type == bfd_link_hash_undefweak
14801 && h->elf.dynindx == -1)
14802 {
14803 /* Make this relocation against an undefined weak symbol
14804 resolve to zero. This is really just a tweak, since
14805 code using weak externs ought to check that they are
14806 defined before using them. */
14807 bfd_byte *p = contents + rel->r_offset - d_offset;
14808
14809 insn = bfd_get_32 (input_bfd, p);
14810 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14811 if (insn != 0)
14812 bfd_put_32 (input_bfd, insn, p);
14813 break;
14814 }
14815 if (htab->elf.tls_sec != NULL)
14816 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14817 if (bfd_link_pic (info))
14818 /* The TPREL16 relocs shouldn't really be used in shared
14819 libs as they will result in DT_TEXTREL being set, but
14820 support them anyway. */
14821 goto dodyn;
14822 break;
14823
14824 case R_PPC64_DTPREL16:
14825 case R_PPC64_DTPREL16_LO:
14826 case R_PPC64_DTPREL16_HI:
14827 case R_PPC64_DTPREL16_HA:
14828 case R_PPC64_DTPREL16_DS:
14829 case R_PPC64_DTPREL16_LO_DS:
14830 case R_PPC64_DTPREL16_HIGH:
14831 case R_PPC64_DTPREL16_HIGHA:
14832 case R_PPC64_DTPREL16_HIGHER:
14833 case R_PPC64_DTPREL16_HIGHERA:
14834 case R_PPC64_DTPREL16_HIGHEST:
14835 case R_PPC64_DTPREL16_HIGHESTA:
14836 if (htab->elf.tls_sec != NULL)
14837 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14838 break;
14839
14840 case R_PPC64_ADDR64_LOCAL:
14841 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14842 ? h->elf.other
14843 : sym->st_other);
14844 break;
14845
14846 case R_PPC64_DTPMOD64:
14847 relocation = 1;
14848 addend = 0;
14849 goto dodyn;
14850
14851 case R_PPC64_TPREL64:
14852 if (htab->elf.tls_sec != NULL)
14853 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14854 goto dodyn;
14855
14856 case R_PPC64_DTPREL64:
14857 if (htab->elf.tls_sec != NULL)
14858 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14859 /* Fall through. */
14860
14861 /* Relocations that may need to be propagated if this is a
14862 dynamic object. */
14863 case R_PPC64_REL30:
14864 case R_PPC64_REL32:
14865 case R_PPC64_REL64:
14866 case R_PPC64_ADDR14:
14867 case R_PPC64_ADDR14_BRNTAKEN:
14868 case R_PPC64_ADDR14_BRTAKEN:
14869 case R_PPC64_ADDR16:
14870 case R_PPC64_ADDR16_DS:
14871 case R_PPC64_ADDR16_HA:
14872 case R_PPC64_ADDR16_HI:
14873 case R_PPC64_ADDR16_HIGH:
14874 case R_PPC64_ADDR16_HIGHA:
14875 case R_PPC64_ADDR16_HIGHER:
14876 case R_PPC64_ADDR16_HIGHERA:
14877 case R_PPC64_ADDR16_HIGHEST:
14878 case R_PPC64_ADDR16_HIGHESTA:
14879 case R_PPC64_ADDR16_LO:
14880 case R_PPC64_ADDR16_LO_DS:
14881 case R_PPC64_ADDR24:
14882 case R_PPC64_ADDR32:
14883 case R_PPC64_ADDR64:
14884 case R_PPC64_UADDR16:
14885 case R_PPC64_UADDR32:
14886 case R_PPC64_UADDR64:
14887 dodyn:
14888 if ((input_section->flags & SEC_ALLOC) == 0)
14889 break;
14890
14891 if (NO_OPD_RELOCS && is_opd)
14892 break;
14893
14894 if (bfd_link_pic (info)
14895 ? ((h == NULL
14896 || h->dyn_relocs != NULL)
14897 && ((h != NULL && pc_dynrelocs (h))
14898 || must_be_dyn_reloc (info, r_type)))
14899 : (h != NULL
14900 ? h->dyn_relocs != NULL
14901 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14902 {
14903 bfd_boolean skip, relocate;
14904 asection *sreloc;
14905 bfd_vma out_off;
14906 long indx = 0;
14907
14908 /* When generating a dynamic object, these relocations
14909 are copied into the output file to be resolved at run
14910 time. */
14911
14912 skip = FALSE;
14913 relocate = FALSE;
14914
14915 out_off = _bfd_elf_section_offset (output_bfd, info,
14916 input_section, rel->r_offset);
14917 if (out_off == (bfd_vma) -1)
14918 skip = TRUE;
14919 else if (out_off == (bfd_vma) -2)
14920 skip = TRUE, relocate = TRUE;
14921 out_off += (input_section->output_section->vma
14922 + input_section->output_offset);
14923 outrel.r_offset = out_off;
14924 outrel.r_addend = rel->r_addend;
14925
14926 /* Optimize unaligned reloc use. */
14927 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14928 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14929 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14930 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14931 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14932 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14933 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14934 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14935 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14936
14937 if (skip)
14938 memset (&outrel, 0, sizeof outrel);
14939 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14940 && !is_opd
14941 && r_type != R_PPC64_TOC)
14942 {
14943 indx = h->elf.dynindx;
14944 BFD_ASSERT (indx != -1);
14945 outrel.r_info = ELF64_R_INFO (indx, r_type);
14946 }
14947 else
14948 {
14949 /* This symbol is local, or marked to become local,
14950 or this is an opd section reloc which must point
14951 at a local function. */
14952 outrel.r_addend += relocation;
14953 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14954 {
14955 if (is_opd && h != NULL)
14956 {
14957 /* Lie about opd entries. This case occurs
14958 when building shared libraries and we
14959 reference a function in another shared
14960 lib. The same thing happens for a weak
14961 definition in an application that's
14962 overridden by a strong definition in a
14963 shared lib. (I believe this is a generic
14964 bug in binutils handling of weak syms.)
14965 In these cases we won't use the opd
14966 entry in this lib. */
14967 unresolved_reloc = FALSE;
14968 }
14969 if (!is_opd
14970 && r_type == R_PPC64_ADDR64
14971 && (h != NULL
14972 ? h->elf.type == STT_GNU_IFUNC
14973 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14974 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14975 else
14976 {
14977 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14978
14979 /* We need to relocate .opd contents for ld.so.
14980 Prelink also wants simple and consistent rules
14981 for relocs. This make all RELATIVE relocs have
14982 *r_offset equal to r_addend. */
14983 relocate = TRUE;
14984 }
14985 }
14986 else
14987 {
14988 if (h != NULL
14989 ? h->elf.type == STT_GNU_IFUNC
14990 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14991 {
14992 info->callbacks->einfo
14993 /* xgettext:c-format */
14994 (_("%H: %s for indirect "
14995 "function `%T' unsupported\n"),
14996 input_bfd, input_section, rel->r_offset,
14997 ppc64_elf_howto_table[r_type]->name,
14998 sym_name);
14999 ret = FALSE;
15000 }
15001 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
15002 ;
15003 else if (sec == NULL || sec->owner == NULL)
15004 {
15005 bfd_set_error (bfd_error_bad_value);
15006 return FALSE;
15007 }
15008 else
15009 {
15010 asection *osec;
15011
15012 osec = sec->output_section;
15013 indx = elf_section_data (osec)->dynindx;
15014
15015 if (indx == 0)
15016 {
15017 if ((osec->flags & SEC_READONLY) == 0
15018 && htab->elf.data_index_section != NULL)
15019 osec = htab->elf.data_index_section;
15020 else
15021 osec = htab->elf.text_index_section;
15022 indx = elf_section_data (osec)->dynindx;
15023 }
15024 BFD_ASSERT (indx != 0);
15025
15026 /* We are turning this relocation into one
15027 against a section symbol, so subtract out
15028 the output section's address but not the
15029 offset of the input section in the output
15030 section. */
15031 outrel.r_addend -= osec->vma;
15032 }
15033
15034 outrel.r_info = ELF64_R_INFO (indx, r_type);
15035 }
15036 }
15037
15038 sreloc = elf_section_data (input_section)->sreloc;
15039 if (h != NULL
15040 ? h->elf.type == STT_GNU_IFUNC
15041 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15042 {
15043 sreloc = htab->elf.irelplt;
15044 if (indx == 0)
15045 htab->local_ifunc_resolver = 1;
15046 else if (is_static_defined (&h->elf))
15047 htab->maybe_local_ifunc_resolver = 1;
15048 }
15049 if (sreloc == NULL)
15050 abort ();
15051
15052 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15053 >= sreloc->size)
15054 abort ();
15055 loc = sreloc->contents;
15056 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15057 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15058
15059 /* If this reloc is against an external symbol, it will
15060 be computed at runtime, so there's no need to do
15061 anything now. However, for the sake of prelink ensure
15062 that the section contents are a known value. */
15063 if (! relocate)
15064 {
15065 unresolved_reloc = FALSE;
15066 /* The value chosen here is quite arbitrary as ld.so
15067 ignores section contents except for the special
15068 case of .opd where the contents might be accessed
15069 before relocation. Choose zero, as that won't
15070 cause reloc overflow. */
15071 relocation = 0;
15072 addend = 0;
15073 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15074 to improve backward compatibility with older
15075 versions of ld. */
15076 if (r_type == R_PPC64_ADDR64)
15077 addend = outrel.r_addend;
15078 /* Adjust pc_relative relocs to have zero in *r_offset. */
15079 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15080 addend = outrel.r_offset;
15081 }
15082 }
15083 else if (r_type == R_PPC64_DTPMOD64
15084 && htab->params->tls_get_addr_opt
15085 && htab->tls_get_addr_fd != NULL
15086 && htab->tls_get_addr_fd->elf.plt.plist != NULL)
15087 {
15088 /* Set up for __tls_get_addr_opt stub, when this entry
15089 does not have dynamic relocs. */
15090 relocation = 0;
15091 /* Set up the next word for local dynamic. If it turns
15092 out to be global dynamic, the reloc will overwrite
15093 this value. */
15094 if (rel->r_offset + 16 <= input_section->size)
15095 bfd_put_64 (input_bfd, DTP_OFFSET - TP_OFFSET,
15096 contents + rel->r_offset + 8);
15097 }
15098 else if (r_type == R_PPC64_DTPREL64
15099 && htab->params->tls_get_addr_opt
15100 && htab->tls_get_addr_fd != NULL
15101 && htab->tls_get_addr_fd->elf.plt.plist != NULL
15102 && rel > relocs
15103 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
15104 && rel[-1].r_offset + 8 == rel->r_offset)
15105 {
15106 /* __tls_get_addr_opt stub value. */
15107 addend += DTP_OFFSET - TP_OFFSET;
15108 }
15109 break;
15110
15111 case R_PPC64_COPY:
15112 case R_PPC64_GLOB_DAT:
15113 case R_PPC64_JMP_SLOT:
15114 case R_PPC64_JMP_IREL:
15115 case R_PPC64_RELATIVE:
15116 /* We shouldn't ever see these dynamic relocs in relocatable
15117 files. */
15118 /* Fall through. */
15119
15120 case R_PPC64_PLTGOT16:
15121 case R_PPC64_PLTGOT16_DS:
15122 case R_PPC64_PLTGOT16_HA:
15123 case R_PPC64_PLTGOT16_HI:
15124 case R_PPC64_PLTGOT16_LO:
15125 case R_PPC64_PLTGOT16_LO_DS:
15126 case R_PPC64_PLTREL32:
15127 case R_PPC64_PLTREL64:
15128 /* These ones haven't been implemented yet. */
15129
15130 info->callbacks->einfo
15131 /* xgettext:c-format */
15132 (_("%P: %B: %s is not supported for `%T'\n"),
15133 input_bfd,
15134 ppc64_elf_howto_table[r_type]->name, sym_name);
15135
15136 bfd_set_error (bfd_error_invalid_operation);
15137 ret = FALSE;
15138 goto copy_reloc;
15139 }
15140
15141 /* Multi-instruction sequences that access the TOC can be
15142 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15143 to nop; addi rb,r2,x; */
15144 switch (r_type)
15145 {
15146 default:
15147 break;
15148
15149 case R_PPC64_GOT_TLSLD16_HI:
15150 case R_PPC64_GOT_TLSGD16_HI:
15151 case R_PPC64_GOT_TPREL16_HI:
15152 case R_PPC64_GOT_DTPREL16_HI:
15153 case R_PPC64_GOT16_HI:
15154 case R_PPC64_TOC16_HI:
15155 /* These relocs would only be useful if building up an
15156 offset to later add to r2, perhaps in an indexed
15157 addressing mode instruction. Don't try to optimize.
15158 Unfortunately, the possibility of someone building up an
15159 offset like this or even with the HA relocs, means that
15160 we need to check the high insn when optimizing the low
15161 insn. */
15162 break;
15163
15164 case R_PPC64_GOT_TLSLD16_HA:
15165 case R_PPC64_GOT_TLSGD16_HA:
15166 case R_PPC64_GOT_TPREL16_HA:
15167 case R_PPC64_GOT_DTPREL16_HA:
15168 case R_PPC64_GOT16_HA:
15169 case R_PPC64_TOC16_HA:
15170 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15171 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15172 {
15173 bfd_byte *p = contents + (rel->r_offset & ~3);
15174 bfd_put_32 (input_bfd, NOP, p);
15175 }
15176 break;
15177
15178 case R_PPC64_GOT_TLSLD16_LO:
15179 case R_PPC64_GOT_TLSGD16_LO:
15180 case R_PPC64_GOT_TPREL16_LO_DS:
15181 case R_PPC64_GOT_DTPREL16_LO_DS:
15182 case R_PPC64_GOT16_LO:
15183 case R_PPC64_GOT16_LO_DS:
15184 case R_PPC64_TOC16_LO:
15185 case R_PPC64_TOC16_LO_DS:
15186 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15187 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15188 {
15189 bfd_byte *p = contents + (rel->r_offset & ~3);
15190 insn = bfd_get_32 (input_bfd, p);
15191 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15192 {
15193 /* Transform addic to addi when we change reg. */
15194 insn &= ~((0x3f << 26) | (0x1f << 16));
15195 insn |= (14u << 26) | (2 << 16);
15196 }
15197 else
15198 {
15199 insn &= ~(0x1f << 16);
15200 insn |= 2 << 16;
15201 }
15202 bfd_put_32 (input_bfd, insn, p);
15203 }
15204 break;
15205 }
15206
15207 /* Do any further special processing. */
15208 howto = ppc64_elf_howto_table[(int) r_type];
15209 switch (r_type)
15210 {
15211 default:
15212 break;
15213
15214 case R_PPC64_REL16_HA:
15215 case R_PPC64_REL16DX_HA:
15216 case R_PPC64_ADDR16_HA:
15217 case R_PPC64_ADDR16_HIGHA:
15218 case R_PPC64_ADDR16_HIGHERA:
15219 case R_PPC64_ADDR16_HIGHESTA:
15220 case R_PPC64_TOC16_HA:
15221 case R_PPC64_SECTOFF_HA:
15222 case R_PPC64_TPREL16_HA:
15223 case R_PPC64_TPREL16_HIGHA:
15224 case R_PPC64_TPREL16_HIGHERA:
15225 case R_PPC64_TPREL16_HIGHESTA:
15226 case R_PPC64_DTPREL16_HA:
15227 case R_PPC64_DTPREL16_HIGHA:
15228 case R_PPC64_DTPREL16_HIGHERA:
15229 case R_PPC64_DTPREL16_HIGHESTA:
15230 /* It's just possible that this symbol is a weak symbol
15231 that's not actually defined anywhere. In that case,
15232 'sec' would be NULL, and we should leave the symbol
15233 alone (it will be set to zero elsewhere in the link). */
15234 if (sec == NULL)
15235 break;
15236 /* Fall through. */
15237
15238 case R_PPC64_GOT16_HA:
15239 case R_PPC64_PLTGOT16_HA:
15240 case R_PPC64_PLT16_HA:
15241 case R_PPC64_GOT_TLSGD16_HA:
15242 case R_PPC64_GOT_TLSLD16_HA:
15243 case R_PPC64_GOT_TPREL16_HA:
15244 case R_PPC64_GOT_DTPREL16_HA:
15245 /* Add 0x10000 if sign bit in 0:15 is set.
15246 Bits 0:15 are not used. */
15247 addend += 0x8000;
15248 break;
15249
15250 case R_PPC64_ADDR16_DS:
15251 case R_PPC64_ADDR16_LO_DS:
15252 case R_PPC64_GOT16_DS:
15253 case R_PPC64_GOT16_LO_DS:
15254 case R_PPC64_PLT16_LO_DS:
15255 case R_PPC64_SECTOFF_DS:
15256 case R_PPC64_SECTOFF_LO_DS:
15257 case R_PPC64_TOC16_DS:
15258 case R_PPC64_TOC16_LO_DS:
15259 case R_PPC64_PLTGOT16_DS:
15260 case R_PPC64_PLTGOT16_LO_DS:
15261 case R_PPC64_GOT_TPREL16_DS:
15262 case R_PPC64_GOT_TPREL16_LO_DS:
15263 case R_PPC64_GOT_DTPREL16_DS:
15264 case R_PPC64_GOT_DTPREL16_LO_DS:
15265 case R_PPC64_TPREL16_DS:
15266 case R_PPC64_TPREL16_LO_DS:
15267 case R_PPC64_DTPREL16_DS:
15268 case R_PPC64_DTPREL16_LO_DS:
15269 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15270 mask = 3;
15271 /* If this reloc is against an lq, lxv, or stxv insn, then
15272 the value must be a multiple of 16. This is somewhat of
15273 a hack, but the "correct" way to do this by defining _DQ
15274 forms of all the _DS relocs bloats all reloc switches in
15275 this file. It doesn't make much sense to use these
15276 relocs in data, so testing the insn should be safe. */
15277 if ((insn & (0x3f << 26)) == (56u << 26)
15278 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15279 mask = 15;
15280 relocation += addend;
15281 addend = insn & (mask ^ 3);
15282 if ((relocation & mask) != 0)
15283 {
15284 relocation ^= relocation & mask;
15285 info->callbacks->einfo
15286 /* xgettext:c-format */
15287 (_("%H: error: %s not a multiple of %u\n"),
15288 input_bfd, input_section, rel->r_offset,
15289 howto->name,
15290 mask + 1);
15291 bfd_set_error (bfd_error_bad_value);
15292 ret = FALSE;
15293 goto copy_reloc;
15294 }
15295 break;
15296 }
15297
15298 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15299 because such sections are not SEC_ALLOC and thus ld.so will
15300 not process them. */
15301 if (unresolved_reloc
15302 && !((input_section->flags & SEC_DEBUGGING) != 0
15303 && h->elf.def_dynamic)
15304 && _bfd_elf_section_offset (output_bfd, info, input_section,
15305 rel->r_offset) != (bfd_vma) -1)
15306 {
15307 info->callbacks->einfo
15308 /* xgettext:c-format */
15309 (_("%H: unresolvable %s against `%T'\n"),
15310 input_bfd, input_section, rel->r_offset,
15311 howto->name,
15312 h->elf.root.root.string);
15313 ret = FALSE;
15314 }
15315
15316 /* 16-bit fields in insns mostly have signed values, but a
15317 few insns have 16-bit unsigned values. Really, we should
15318 have different reloc types. */
15319 if (howto->complain_on_overflow != complain_overflow_dont
15320 && howto->dst_mask == 0xffff
15321 && (input_section->flags & SEC_CODE) != 0)
15322 {
15323 enum complain_overflow complain = complain_overflow_signed;
15324
15325 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15326 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15327 complain = complain_overflow_bitfield;
15328 else if (howto->rightshift == 0
15329 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15330 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15331 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15332 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15333 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15334 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15335 complain = complain_overflow_unsigned;
15336 if (howto->complain_on_overflow != complain)
15337 {
15338 alt_howto = *howto;
15339 alt_howto.complain_on_overflow = complain;
15340 howto = &alt_howto;
15341 }
15342 }
15343
15344 if (r_type == R_PPC64_REL16DX_HA)
15345 {
15346 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15347 if (rel->r_offset + 4 > input_section->size)
15348 r = bfd_reloc_outofrange;
15349 else
15350 {
15351 relocation += addend;
15352 relocation -= (rel->r_offset
15353 + input_section->output_offset
15354 + input_section->output_section->vma);
15355 relocation = (bfd_signed_vma) relocation >> 16;
15356 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15357 insn &= ~0x1fffc1;
15358 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15359 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15360 r = bfd_reloc_ok;
15361 if (relocation + 0x8000 > 0xffff)
15362 r = bfd_reloc_overflow;
15363 }
15364 }
15365 else
15366 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15367 rel->r_offset, relocation, addend);
15368
15369 if (r != bfd_reloc_ok)
15370 {
15371 char *more_info = NULL;
15372 const char *reloc_name = howto->name;
15373
15374 if (reloc_dest != DEST_NORMAL)
15375 {
15376 more_info = bfd_malloc (strlen (reloc_name) + 8);
15377 if (more_info != NULL)
15378 {
15379 strcpy (more_info, reloc_name);
15380 strcat (more_info, (reloc_dest == DEST_OPD
15381 ? " (OPD)" : " (stub)"));
15382 reloc_name = more_info;
15383 }
15384 }
15385
15386 if (r == bfd_reloc_overflow)
15387 {
15388 /* On code like "if (foo) foo();" don't report overflow
15389 on a branch to zero when foo is undefined. */
15390 if (!warned
15391 && (reloc_dest == DEST_STUB
15392 || !(h != NULL
15393 && (h->elf.root.type == bfd_link_hash_undefweak
15394 || h->elf.root.type == bfd_link_hash_undefined)
15395 && is_branch_reloc (r_type))))
15396 info->callbacks->reloc_overflow (info, &h->elf.root,
15397 sym_name, reloc_name,
15398 orig_rel.r_addend,
15399 input_bfd, input_section,
15400 rel->r_offset);
15401 }
15402 else
15403 {
15404 info->callbacks->einfo
15405 /* xgettext:c-format */
15406 (_("%H: %s against `%T': error %d\n"),
15407 input_bfd, input_section, rel->r_offset,
15408 reloc_name, sym_name, (int) r);
15409 ret = FALSE;
15410 }
15411 if (more_info != NULL)
15412 free (more_info);
15413 }
15414 copy_reloc:
15415 if (wrel != rel)
15416 *wrel = *rel;
15417 }
15418
15419 if (wrel != rel)
15420 {
15421 Elf_Internal_Shdr *rel_hdr;
15422 size_t deleted = rel - wrel;
15423
15424 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15425 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15426 if (rel_hdr->sh_size == 0)
15427 {
15428 /* It is too late to remove an empty reloc section. Leave
15429 one NONE reloc.
15430 ??? What is wrong with an empty section??? */
15431 rel_hdr->sh_size = rel_hdr->sh_entsize;
15432 deleted -= 1;
15433 }
15434 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15435 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15436 input_section->reloc_count -= deleted;
15437 }
15438
15439 /* If we're emitting relocations, then shortly after this function
15440 returns, reloc offsets and addends for this section will be
15441 adjusted. Worse, reloc symbol indices will be for the output
15442 file rather than the input. Save a copy of the relocs for
15443 opd_entry_value. */
15444 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15445 {
15446 bfd_size_type amt;
15447 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15448 rel = bfd_alloc (input_bfd, amt);
15449 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15450 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15451 if (rel == NULL)
15452 return FALSE;
15453 memcpy (rel, relocs, amt);
15454 }
15455 return ret;
15456 }
15457
15458 /* Adjust the value of any local symbols in opd sections. */
15459
15460 static int
15461 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15462 const char *name ATTRIBUTE_UNUSED,
15463 Elf_Internal_Sym *elfsym,
15464 asection *input_sec,
15465 struct elf_link_hash_entry *h)
15466 {
15467 struct _opd_sec_data *opd;
15468 long adjust;
15469 bfd_vma value;
15470
15471 if (h != NULL)
15472 return 1;
15473
15474 opd = get_opd_info (input_sec);
15475 if (opd == NULL || opd->adjust == NULL)
15476 return 1;
15477
15478 value = elfsym->st_value - input_sec->output_offset;
15479 if (!bfd_link_relocatable (info))
15480 value -= input_sec->output_section->vma;
15481
15482 adjust = opd->adjust[OPD_NDX (value)];
15483 if (adjust == -1)
15484 return 2;
15485
15486 elfsym->st_value += adjust;
15487 return 1;
15488 }
15489
15490 /* Finish up dynamic symbol handling. We set the contents of various
15491 dynamic sections here. */
15492
15493 static bfd_boolean
15494 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15495 struct bfd_link_info *info,
15496 struct elf_link_hash_entry *h,
15497 Elf_Internal_Sym *sym)
15498 {
15499 struct ppc_link_hash_table *htab;
15500 struct plt_entry *ent;
15501 Elf_Internal_Rela rela;
15502 bfd_byte *loc;
15503
15504 htab = ppc_hash_table (info);
15505 if (htab == NULL)
15506 return FALSE;
15507
15508 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15509 if (ent->plt.offset != (bfd_vma) -1)
15510 {
15511 /* This symbol has an entry in the procedure linkage
15512 table. Set it up. */
15513 if (!htab->elf.dynamic_sections_created
15514 || h->dynindx == -1)
15515 {
15516 BFD_ASSERT (h->type == STT_GNU_IFUNC
15517 && h->def_regular
15518 && (h->root.type == bfd_link_hash_defined
15519 || h->root.type == bfd_link_hash_defweak));
15520 rela.r_offset = (htab->elf.iplt->output_section->vma
15521 + htab->elf.iplt->output_offset
15522 + ent->plt.offset);
15523 if (htab->opd_abi)
15524 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15525 else
15526 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15527 rela.r_addend = (h->root.u.def.value
15528 + h->root.u.def.section->output_offset
15529 + h->root.u.def.section->output_section->vma
15530 + ent->addend);
15531 loc = (htab->elf.irelplt->contents
15532 + (htab->elf.irelplt->reloc_count++
15533 * sizeof (Elf64_External_Rela)));
15534 htab->local_ifunc_resolver = 1;
15535 }
15536 else
15537 {
15538 rela.r_offset = (htab->elf.splt->output_section->vma
15539 + htab->elf.splt->output_offset
15540 + ent->plt.offset);
15541 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15542 rela.r_addend = ent->addend;
15543 loc = (htab->elf.srelplt->contents
15544 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15545 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15546 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15547 htab->maybe_local_ifunc_resolver = 1;
15548 }
15549 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15550
15551 if (!htab->opd_abi)
15552 {
15553 if (!h->def_regular)
15554 {
15555 /* Mark the symbol as undefined, rather than as
15556 defined in glink. Leave the value if there were
15557 any relocations where pointer equality matters
15558 (this is a clue for the dynamic linker, to make
15559 function pointer comparisons work between an
15560 application and shared library), otherwise set it
15561 to zero. */
15562 sym->st_shndx = SHN_UNDEF;
15563 if (!h->pointer_equality_needed)
15564 sym->st_value = 0;
15565 else if (!h->ref_regular_nonweak)
15566 {
15567 /* This breaks function pointer comparisons, but
15568 that is better than breaking tests for a NULL
15569 function pointer. */
15570 sym->st_value = 0;
15571 }
15572 }
15573 }
15574 }
15575
15576 if (h->needs_copy)
15577 {
15578 /* This symbol needs a copy reloc. Set it up. */
15579 asection *srel;
15580
15581 if (h->dynindx == -1
15582 || (h->root.type != bfd_link_hash_defined
15583 && h->root.type != bfd_link_hash_defweak)
15584 || htab->elf.srelbss == NULL
15585 || htab->elf.sreldynrelro == NULL)
15586 abort ();
15587
15588 rela.r_offset = (h->root.u.def.value
15589 + h->root.u.def.section->output_section->vma
15590 + h->root.u.def.section->output_offset);
15591 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15592 rela.r_addend = 0;
15593 if (h->root.u.def.section == htab->elf.sdynrelro)
15594 srel = htab->elf.sreldynrelro;
15595 else
15596 srel = htab->elf.srelbss;
15597 loc = srel->contents;
15598 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15599 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15600 }
15601
15602 return TRUE;
15603 }
15604
15605 /* Used to decide how to sort relocs in an optimal manner for the
15606 dynamic linker, before writing them out. */
15607
15608 static enum elf_reloc_type_class
15609 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15610 const asection *rel_sec,
15611 const Elf_Internal_Rela *rela)
15612 {
15613 enum elf_ppc64_reloc_type r_type;
15614 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15615
15616 if (rel_sec == htab->elf.irelplt)
15617 return reloc_class_ifunc;
15618
15619 r_type = ELF64_R_TYPE (rela->r_info);
15620 switch (r_type)
15621 {
15622 case R_PPC64_RELATIVE:
15623 return reloc_class_relative;
15624 case R_PPC64_JMP_SLOT:
15625 return reloc_class_plt;
15626 case R_PPC64_COPY:
15627 return reloc_class_copy;
15628 default:
15629 return reloc_class_normal;
15630 }
15631 }
15632
15633 /* Finish up the dynamic sections. */
15634
15635 static bfd_boolean
15636 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15637 struct bfd_link_info *info)
15638 {
15639 struct ppc_link_hash_table *htab;
15640 bfd *dynobj;
15641 asection *sdyn;
15642
15643 htab = ppc_hash_table (info);
15644 if (htab == NULL)
15645 return FALSE;
15646
15647 dynobj = htab->elf.dynobj;
15648 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15649
15650 if (htab->elf.dynamic_sections_created)
15651 {
15652 Elf64_External_Dyn *dyncon, *dynconend;
15653
15654 if (sdyn == NULL || htab->elf.sgot == NULL)
15655 abort ();
15656
15657 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15658 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15659 for (; dyncon < dynconend; dyncon++)
15660 {
15661 Elf_Internal_Dyn dyn;
15662 asection *s;
15663
15664 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15665
15666 switch (dyn.d_tag)
15667 {
15668 default:
15669 continue;
15670
15671 case DT_PPC64_GLINK:
15672 s = htab->glink;
15673 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15674 /* We stupidly defined DT_PPC64_GLINK to be the start
15675 of glink rather than the first entry point, which is
15676 what ld.so needs, and now have a bigger stub to
15677 support automatic multiple TOCs. */
15678 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15679 break;
15680
15681 case DT_PPC64_OPD:
15682 s = bfd_get_section_by_name (output_bfd, ".opd");
15683 if (s == NULL)
15684 continue;
15685 dyn.d_un.d_ptr = s->vma;
15686 break;
15687
15688 case DT_PPC64_OPT:
15689 if (htab->do_multi_toc && htab->multi_toc_needed)
15690 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15691 if (htab->has_plt_localentry0)
15692 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15693 break;
15694
15695 case DT_PPC64_OPDSZ:
15696 s = bfd_get_section_by_name (output_bfd, ".opd");
15697 if (s == NULL)
15698 continue;
15699 dyn.d_un.d_val = s->size;
15700 break;
15701
15702 case DT_PLTGOT:
15703 s = htab->elf.splt;
15704 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15705 break;
15706
15707 case DT_JMPREL:
15708 s = htab->elf.srelplt;
15709 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15710 break;
15711
15712 case DT_PLTRELSZ:
15713 dyn.d_un.d_val = htab->elf.srelplt->size;
15714 break;
15715
15716 case DT_TEXTREL:
15717 if (htab->local_ifunc_resolver)
15718 info->callbacks->einfo
15719 (_("%X%P: text relocations and GNU indirect "
15720 "functions will result in a segfault at runtime\n"));
15721 else if (htab->maybe_local_ifunc_resolver)
15722 info->callbacks->einfo
15723 (_("%P: warning: text relocations and GNU indirect "
15724 "functions may result in a segfault at runtime\n"));
15725 continue;
15726 }
15727
15728 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15729 }
15730 }
15731
15732 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15733 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15734 {
15735 /* Fill in the first entry in the global offset table.
15736 We use it to hold the link-time TOCbase. */
15737 bfd_put_64 (output_bfd,
15738 elf_gp (output_bfd) + TOC_BASE_OFF,
15739 htab->elf.sgot->contents);
15740
15741 /* Set .got entry size. */
15742 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15743 }
15744
15745 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15746 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15747 {
15748 /* Set .plt entry size. */
15749 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15750 = PLT_ENTRY_SIZE (htab);
15751 }
15752
15753 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15754 brlt ourselves if emitrelocations. */
15755 if (htab->brlt != NULL
15756 && htab->brlt->reloc_count != 0
15757 && !_bfd_elf_link_output_relocs (output_bfd,
15758 htab->brlt,
15759 elf_section_data (htab->brlt)->rela.hdr,
15760 elf_section_data (htab->brlt)->relocs,
15761 NULL))
15762 return FALSE;
15763
15764 if (htab->glink != NULL
15765 && htab->glink->reloc_count != 0
15766 && !_bfd_elf_link_output_relocs (output_bfd,
15767 htab->glink,
15768 elf_section_data (htab->glink)->rela.hdr,
15769 elf_section_data (htab->glink)->relocs,
15770 NULL))
15771 return FALSE;
15772
15773 if (htab->glink_eh_frame != NULL
15774 && htab->glink_eh_frame->size != 0)
15775 {
15776 bfd_vma val;
15777 bfd_byte *p;
15778 asection *stub_sec;
15779 size_t align = 4;
15780
15781 p = htab->glink_eh_frame->contents;
15782 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15783 for (stub_sec = htab->params->stub_bfd->sections;
15784 stub_sec != NULL;
15785 stub_sec = stub_sec->next)
15786 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15787 {
15788 /* FDE length. */
15789 p += 4;
15790 /* CIE pointer. */
15791 p += 4;
15792 /* Offset to stub section. */
15793 val = (stub_sec->output_section->vma
15794 + stub_sec->output_offset);
15795 val -= (htab->glink_eh_frame->output_section->vma
15796 + htab->glink_eh_frame->output_offset
15797 + (p - htab->glink_eh_frame->contents));
15798 if (val + 0x80000000 > 0xffffffff)
15799 {
15800 info->callbacks->einfo
15801 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15802 stub_sec->name);
15803 return FALSE;
15804 }
15805 bfd_put_32 (dynobj, val, p);
15806 p += 4;
15807 /* stub section size. */
15808 p += 4;
15809 /* Augmentation. */
15810 p += 1;
15811 /* Pad. */
15812 p += ((17 + align - 1) & -align) - 17;
15813 }
15814 if (htab->glink != NULL && htab->glink->size != 0)
15815 {
15816 /* FDE length. */
15817 p += 4;
15818 /* CIE pointer. */
15819 p += 4;
15820 /* Offset to .glink. */
15821 val = (htab->glink->output_section->vma
15822 + htab->glink->output_offset
15823 + 8);
15824 val -= (htab->glink_eh_frame->output_section->vma
15825 + htab->glink_eh_frame->output_offset
15826 + (p - htab->glink_eh_frame->contents));
15827 if (val + 0x80000000 > 0xffffffff)
15828 {
15829 info->callbacks->einfo
15830 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15831 htab->glink->name);
15832 return FALSE;
15833 }
15834 bfd_put_32 (dynobj, val, p);
15835 p += 4;
15836 /* .glink size. */
15837 p += 4;
15838 /* Augmentation. */
15839 p += 1;
15840 /* Ops. */
15841 p += 7;
15842 p += ((24 + align - 1) & -align) - 24;
15843 }
15844
15845 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15846 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15847 htab->glink_eh_frame,
15848 htab->glink_eh_frame->contents))
15849 return FALSE;
15850 }
15851
15852 /* We need to handle writing out multiple GOT sections ourselves,
15853 since we didn't add them to DYNOBJ. We know dynobj is the first
15854 bfd. */
15855 while ((dynobj = dynobj->link.next) != NULL)
15856 {
15857 asection *s;
15858
15859 if (!is_ppc64_elf (dynobj))
15860 continue;
15861
15862 s = ppc64_elf_tdata (dynobj)->got;
15863 if (s != NULL
15864 && s->size != 0
15865 && s->output_section != bfd_abs_section_ptr
15866 && !bfd_set_section_contents (output_bfd, s->output_section,
15867 s->contents, s->output_offset,
15868 s->size))
15869 return FALSE;
15870 s = ppc64_elf_tdata (dynobj)->relgot;
15871 if (s != NULL
15872 && s->size != 0
15873 && s->output_section != bfd_abs_section_ptr
15874 && !bfd_set_section_contents (output_bfd, s->output_section,
15875 s->contents, s->output_offset,
15876 s->size))
15877 return FALSE;
15878 }
15879
15880 return TRUE;
15881 }
15882
15883 #include "elf64-target.h"
15884
15885 /* FreeBSD support */
15886
15887 #undef TARGET_LITTLE_SYM
15888 #undef TARGET_LITTLE_NAME
15889
15890 #undef TARGET_BIG_SYM
15891 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15892 #undef TARGET_BIG_NAME
15893 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15894
15895 #undef ELF_OSABI
15896 #define ELF_OSABI ELFOSABI_FREEBSD
15897
15898 #undef elf64_bed
15899 #define elf64_bed elf64_powerpc_fbsd_bed
15900
15901 #include "elf64-target.h"
15902
GDB Binutils - Deliverables
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