Commit | Line | Data |
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a85d7ed0 | 1 | /* IBM S/390-specific support for 64-bit ELF |
b2a8e766 | 2 | Copyright 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. |
a85d7ed0 NC |
3 | Contributed Martin Schwidefsky (schwidefsky@de.ibm.com). |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "bfdlink.h" | |
25 | #include "libbfd.h" | |
26 | #include "elf-bfd.h" | |
27 | ||
28 | static reloc_howto_type *elf_s390_reloc_type_lookup | |
29 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
30 | static void elf_s390_info_to_howto | |
31 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); | |
b34976b6 | 32 | static bfd_boolean elf_s390_is_local_label_name |
0451c93c MS |
33 | PARAMS ((bfd *, const char *)); |
34 | static struct bfd_hash_entry *link_hash_newfunc | |
a85d7ed0 NC |
35 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
36 | static struct bfd_link_hash_table *elf_s390_link_hash_table_create | |
37 | PARAMS ((bfd *)); | |
b34976b6 | 38 | static bfd_boolean create_got_section |
0451c93c | 39 | PARAMS((bfd *, struct bfd_link_info *)); |
b34976b6 | 40 | static bfd_boolean elf_s390_create_dynamic_sections |
0451c93c MS |
41 | PARAMS((bfd *, struct bfd_link_info *)); |
42 | static void elf_s390_copy_indirect_symbol | |
9c5bfbb7 | 43 | PARAMS ((const struct elf_backend_data *, struct elf_link_hash_entry *, |
b48fa14c | 44 | struct elf_link_hash_entry *)); |
b34976b6 | 45 | static bfd_boolean elf_s390_check_relocs |
a85d7ed0 NC |
46 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
47 | const Elf_Internal_Rela *)); | |
99c79b2e | 48 | static asection *elf_s390_gc_mark_hook |
1e2f5b6e | 49 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
99c79b2e | 50 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
b34976b6 | 51 | static bfd_boolean elf_s390_gc_sweep_hook |
99c79b2e AJ |
52 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
53 | const Elf_Internal_Rela *)); | |
5236c819 MS |
54 | struct elf_s390_link_hash_entry; |
55 | static void elf_s390_adjust_gotplt | |
56 | PARAMS ((struct elf_s390_link_hash_entry *)); | |
b34976b6 | 57 | static bfd_boolean elf_s390_adjust_dynamic_symbol |
a85d7ed0 | 58 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 59 | static bfd_boolean allocate_dynrelocs |
0451c93c | 60 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 61 | static bfd_boolean readonly_dynrelocs |
0451c93c | 62 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 63 | static bfd_boolean elf_s390_size_dynamic_sections |
a85d7ed0 | 64 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 65 | static bfd_boolean elf_s390_relocate_section |
a85d7ed0 NC |
66 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
67 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
b34976b6 | 68 | static bfd_boolean elf_s390_finish_dynamic_symbol |
a85d7ed0 NC |
69 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
70 | Elf_Internal_Sym *)); | |
0451c93c MS |
71 | static enum elf_reloc_type_class elf_s390_reloc_type_class |
72 | PARAMS ((const Elf_Internal_Rela *)); | |
b34976b6 | 73 | static bfd_boolean elf_s390_finish_dynamic_sections |
a85d7ed0 | 74 | PARAMS ((bfd *, struct bfd_link_info *)); |
69fc87f1 MS |
75 | static bfd_boolean elf_s390_mkobject |
76 | PARAMS ((bfd *)); | |
5236c819 MS |
77 | static bfd_boolean elf_s390_object_p |
78 | PARAMS ((bfd *)); | |
69fc87f1 MS |
79 | static int elf_s390_tls_transition |
80 | PARAMS ((struct bfd_link_info *, int, int)); | |
81 | static bfd_reloc_status_type s390_tls_reloc | |
82 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
83 | static bfd_vma dtpoff_base | |
84 | PARAMS ((struct bfd_link_info *)); | |
85 | static bfd_vma tpoff | |
86 | PARAMS ((struct bfd_link_info *, bfd_vma)); | |
87 | static void invalid_tls_insn | |
88 | PARAMS ((bfd *, asection *, Elf_Internal_Rela *)); | |
bd1ea41b MS |
89 | static bfd_reloc_status_type s390_elf_ldisp_reloc |
90 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
a85d7ed0 | 91 | |
a85d7ed0 NC |
92 | #include "elf/s390.h" |
93 | ||
94 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value | |
95 | from smaller values. Start with zero, widen, *then* decrement. */ | |
96 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
97 | ||
98 | /* The relocation "howto" table. */ | |
99 | static reloc_howto_type elf_howto_table[] = | |
100 | { | |
101 | HOWTO (R_390_NONE, /* type */ | |
102 | 0, /* rightshift */ | |
103 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
104 | 0, /* bitsize */ | |
b34976b6 | 105 | FALSE, /* pc_relative */ |
a85d7ed0 NC |
106 | 0, /* bitpos */ |
107 | complain_overflow_dont, /* complain_on_overflow */ | |
108 | bfd_elf_generic_reloc, /* special_function */ | |
109 | "R_390_NONE", /* name */ | |
b34976b6 | 110 | FALSE, /* partial_inplace */ |
a85d7ed0 NC |
111 | 0, /* src_mask */ |
112 | 0, /* dst_mask */ | |
b34976b6 AM |
113 | FALSE), /* pcrel_offset */ |
114 | ||
5236c819 MS |
115 | HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
116 | bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), | |
117 | HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
118 | bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), | |
119 | HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
120 | bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), | |
121 | HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
122 | bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), | |
123 | HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
124 | bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), | |
15f8604d | 125 | HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, |
5236c819 MS |
126 | bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), |
127 | HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
128 | bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), | |
129 | HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
130 | bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), | |
131 | HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
132 | bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), | |
133 | HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
134 | bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE), | |
135 | HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
136 | bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE), | |
137 | HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
138 | bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE), | |
139 | HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
140 | bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE), | |
141 | HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
142 | bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), | |
143 | HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
144 | bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), | |
145 | HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
146 | bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), | |
147 | HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
148 | bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), | |
149 | HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
150 | bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), | |
151 | HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
152 | bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), | |
153 | HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
154 | bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), | |
155 | HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
156 | bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE), | |
157 | HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
158 | bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), | |
159 | HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
160 | bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), | |
161 | HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
162 | bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), | |
163 | HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
164 | bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), | |
165 | HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
166 | bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), | |
167 | HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
168 | bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
169 | HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
170 | bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE), | |
171 | HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
172 | bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), | |
173 | HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
174 | bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), | |
175 | HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
176 | bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), | |
177 | HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
178 | bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE), | |
179 | HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
180 | bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE), | |
181 | HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
182 | bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
183 | HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
184 | bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), | |
185 | HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
186 | bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE), | |
69fc87f1 MS |
187 | HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
188 | s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), | |
189 | HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
190 | s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), | |
191 | HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
192 | s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), | |
193 | EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */ | |
194 | HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
195 | bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE), | |
196 | HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
197 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), | |
198 | EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */ | |
199 | HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
200 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE), | |
201 | EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */ | |
202 | HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
203 | bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE), | |
204 | EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */ | |
205 | HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
206 | bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE), | |
207 | HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
208 | bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE), | |
209 | EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */ | |
210 | HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
211 | bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE), | |
212 | EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */ | |
213 | HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
214 | bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE), | |
215 | HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
216 | bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE), | |
217 | HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
218 | bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE), | |
219 | HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
220 | bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE), | |
bd1ea41b MS |
221 | HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
222 | s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), | |
223 | HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
224 | s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), | |
225 | HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
226 | s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), | |
227 | HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
228 | s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), | |
a85d7ed0 NC |
229 | }; |
230 | ||
231 | /* GNU extension to record C++ vtable hierarchy. */ | |
232 | static reloc_howto_type elf64_s390_vtinherit_howto = | |
b34976b6 | 233 | HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); |
a85d7ed0 | 234 | static reloc_howto_type elf64_s390_vtentry_howto = |
b34976b6 | 235 | HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE); |
a85d7ed0 NC |
236 | |
237 | static reloc_howto_type * | |
238 | elf_s390_reloc_type_lookup (abfd, code) | |
239 | bfd *abfd ATTRIBUTE_UNUSED; | |
240 | bfd_reloc_code_real_type code; | |
241 | { | |
0451c93c MS |
242 | switch (code) |
243 | { | |
244 | case BFD_RELOC_NONE: | |
245 | return &elf_howto_table[(int) R_390_NONE]; | |
246 | case BFD_RELOC_8: | |
247 | return &elf_howto_table[(int) R_390_8]; | |
248 | case BFD_RELOC_390_12: | |
249 | return &elf_howto_table[(int) R_390_12]; | |
250 | case BFD_RELOC_16: | |
251 | return &elf_howto_table[(int) R_390_16]; | |
252 | case BFD_RELOC_32: | |
253 | return &elf_howto_table[(int) R_390_32]; | |
254 | case BFD_RELOC_CTOR: | |
255 | return &elf_howto_table[(int) R_390_32]; | |
256 | case BFD_RELOC_32_PCREL: | |
257 | return &elf_howto_table[(int) R_390_PC32]; | |
258 | case BFD_RELOC_390_GOT12: | |
259 | return &elf_howto_table[(int) R_390_GOT12]; | |
260 | case BFD_RELOC_32_GOT_PCREL: | |
261 | return &elf_howto_table[(int) R_390_GOT32]; | |
262 | case BFD_RELOC_390_PLT32: | |
263 | return &elf_howto_table[(int) R_390_PLT32]; | |
264 | case BFD_RELOC_390_COPY: | |
265 | return &elf_howto_table[(int) R_390_COPY]; | |
266 | case BFD_RELOC_390_GLOB_DAT: | |
267 | return &elf_howto_table[(int) R_390_GLOB_DAT]; | |
268 | case BFD_RELOC_390_JMP_SLOT: | |
269 | return &elf_howto_table[(int) R_390_JMP_SLOT]; | |
270 | case BFD_RELOC_390_RELATIVE: | |
271 | return &elf_howto_table[(int) R_390_RELATIVE]; | |
272 | case BFD_RELOC_32_GOTOFF: | |
5236c819 | 273 | return &elf_howto_table[(int) R_390_GOTOFF32]; |
0451c93c MS |
274 | case BFD_RELOC_390_GOTPC: |
275 | return &elf_howto_table[(int) R_390_GOTPC]; | |
276 | case BFD_RELOC_390_GOT16: | |
277 | return &elf_howto_table[(int) R_390_GOT16]; | |
278 | case BFD_RELOC_16_PCREL: | |
279 | return &elf_howto_table[(int) R_390_PC16]; | |
280 | case BFD_RELOC_390_PC16DBL: | |
281 | return &elf_howto_table[(int) R_390_PC16DBL]; | |
282 | case BFD_RELOC_390_PLT16DBL: | |
283 | return &elf_howto_table[(int) R_390_PLT16DBL]; | |
0451c93c MS |
284 | case BFD_RELOC_390_PC32DBL: |
285 | return &elf_howto_table[(int) R_390_PC32DBL]; | |
286 | case BFD_RELOC_390_PLT32DBL: | |
287 | return &elf_howto_table[(int) R_390_PLT32DBL]; | |
288 | case BFD_RELOC_390_GOTPCDBL: | |
289 | return &elf_howto_table[(int) R_390_GOTPCDBL]; | |
290 | case BFD_RELOC_64: | |
291 | return &elf_howto_table[(int) R_390_64]; | |
292 | case BFD_RELOC_64_PCREL: | |
293 | return &elf_howto_table[(int) R_390_PC64]; | |
294 | case BFD_RELOC_390_GOT64: | |
295 | return &elf_howto_table[(int) R_390_GOT64]; | |
296 | case BFD_RELOC_390_PLT64: | |
297 | return &elf_howto_table[(int) R_390_PLT64]; | |
298 | case BFD_RELOC_390_GOTENT: | |
299 | return &elf_howto_table[(int) R_390_GOTENT]; | |
5236c819 MS |
300 | case BFD_RELOC_16_GOTOFF: |
301 | return &elf_howto_table[(int) R_390_GOTOFF16]; | |
302 | case BFD_RELOC_390_GOTOFF64: | |
303 | return &elf_howto_table[(int) R_390_GOTOFF64]; | |
304 | case BFD_RELOC_390_GOTPLT12: | |
305 | return &elf_howto_table[(int) R_390_GOTPLT12]; | |
306 | case BFD_RELOC_390_GOTPLT16: | |
307 | return &elf_howto_table[(int) R_390_GOTPLT16]; | |
308 | case BFD_RELOC_390_GOTPLT32: | |
309 | return &elf_howto_table[(int) R_390_GOTPLT32]; | |
310 | case BFD_RELOC_390_GOTPLT64: | |
311 | return &elf_howto_table[(int) R_390_GOTPLT64]; | |
312 | case BFD_RELOC_390_GOTPLTENT: | |
313 | return &elf_howto_table[(int) R_390_GOTPLTENT]; | |
314 | case BFD_RELOC_390_PLTOFF16: | |
315 | return &elf_howto_table[(int) R_390_PLTOFF16]; | |
316 | case BFD_RELOC_390_PLTOFF32: | |
317 | return &elf_howto_table[(int) R_390_PLTOFF32]; | |
318 | case BFD_RELOC_390_PLTOFF64: | |
319 | return &elf_howto_table[(int) R_390_PLTOFF64]; | |
69fc87f1 MS |
320 | case BFD_RELOC_390_TLS_LOAD: |
321 | return &elf_howto_table[(int) R_390_TLS_LOAD]; | |
322 | case BFD_RELOC_390_TLS_GDCALL: | |
323 | return &elf_howto_table[(int) R_390_TLS_GDCALL]; | |
324 | case BFD_RELOC_390_TLS_LDCALL: | |
325 | return &elf_howto_table[(int) R_390_TLS_LDCALL]; | |
326 | case BFD_RELOC_390_TLS_GD64: | |
327 | return &elf_howto_table[(int) R_390_TLS_GD64]; | |
328 | case BFD_RELOC_390_TLS_GOTIE12: | |
329 | return &elf_howto_table[(int) R_390_TLS_GOTIE12]; | |
330 | case BFD_RELOC_390_TLS_GOTIE64: | |
331 | return &elf_howto_table[(int) R_390_TLS_GOTIE64]; | |
332 | case BFD_RELOC_390_TLS_LDM64: | |
333 | return &elf_howto_table[(int) R_390_TLS_LDM64]; | |
334 | case BFD_RELOC_390_TLS_IE64: | |
335 | return &elf_howto_table[(int) R_390_TLS_IE64]; | |
336 | case BFD_RELOC_390_TLS_IEENT: | |
337 | return &elf_howto_table[(int) R_390_TLS_IEENT]; | |
338 | case BFD_RELOC_390_TLS_LE64: | |
339 | return &elf_howto_table[(int) R_390_TLS_LE64]; | |
340 | case BFD_RELOC_390_TLS_LDO64: | |
341 | return &elf_howto_table[(int) R_390_TLS_LDO64]; | |
342 | case BFD_RELOC_390_TLS_DTPMOD: | |
343 | return &elf_howto_table[(int) R_390_TLS_DTPMOD]; | |
344 | case BFD_RELOC_390_TLS_DTPOFF: | |
345 | return &elf_howto_table[(int) R_390_TLS_DTPOFF]; | |
346 | case BFD_RELOC_390_TLS_TPOFF: | |
347 | return &elf_howto_table[(int) R_390_TLS_TPOFF]; | |
bd1ea41b MS |
348 | case BFD_RELOC_390_20: |
349 | return &elf_howto_table[(int) R_390_20]; | |
350 | case BFD_RELOC_390_GOT20: | |
351 | return &elf_howto_table[(int) R_390_GOT20]; | |
352 | case BFD_RELOC_390_GOTPLT20: | |
353 | return &elf_howto_table[(int) R_390_GOTPLT20]; | |
354 | case BFD_RELOC_390_TLS_GOTIE20: | |
355 | return &elf_howto_table[(int) R_390_TLS_GOTIE20]; | |
5236c819 MS |
356 | case BFD_RELOC_VTABLE_INHERIT: |
357 | return &elf64_s390_vtinherit_howto; | |
358 | case BFD_RELOC_VTABLE_ENTRY: | |
359 | return &elf64_s390_vtentry_howto; | |
0451c93c MS |
360 | default: |
361 | break; | |
362 | } | |
a85d7ed0 NC |
363 | return 0; |
364 | } | |
365 | ||
366 | /* We need to use ELF64_R_TYPE so we have our own copy of this function, | |
367 | and elf64-s390.c has its own copy. */ | |
368 | ||
369 | static void | |
370 | elf_s390_info_to_howto (abfd, cache_ptr, dst) | |
371 | bfd *abfd ATTRIBUTE_UNUSED; | |
372 | arelent *cache_ptr; | |
373 | Elf_Internal_Rela *dst; | |
374 | { | |
375 | switch (ELF64_R_TYPE(dst->r_info)) | |
376 | { | |
377 | case R_390_GNU_VTINHERIT: | |
378 | cache_ptr->howto = &elf64_s390_vtinherit_howto; | |
379 | break; | |
380 | ||
381 | case R_390_GNU_VTENTRY: | |
382 | cache_ptr->howto = &elf64_s390_vtentry_howto; | |
383 | break; | |
384 | ||
385 | default: | |
386 | BFD_ASSERT (ELF64_R_TYPE(dst->r_info) < (unsigned int) R_390_max); | |
387 | cache_ptr->howto = &elf_howto_table[ELF64_R_TYPE(dst->r_info)]; | |
99c79b2e | 388 | } |
a85d7ed0 NC |
389 | } |
390 | ||
69fc87f1 MS |
391 | /* A relocation function which doesn't do anything. */ |
392 | static bfd_reloc_status_type | |
393 | s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, | |
26e41594 | 394 | output_bfd, error_message) |
69fc87f1 MS |
395 | bfd *abfd ATTRIBUTE_UNUSED; |
396 | arelent *reloc_entry; | |
397 | asymbol *symbol ATTRIBUTE_UNUSED; | |
398 | PTR data ATTRIBUTE_UNUSED; | |
399 | asection *input_section; | |
400 | bfd *output_bfd; | |
401 | char **error_message ATTRIBUTE_UNUSED; | |
402 | { | |
403 | if (output_bfd) | |
404 | reloc_entry->address += input_section->output_offset; | |
405 | return bfd_reloc_ok; | |
406 | } | |
407 | ||
bd1ea41b MS |
408 | /* Handle the large displacement relocs. */ |
409 | static bfd_reloc_status_type | |
410 | s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section, | |
411 | output_bfd, error_message) | |
412 | bfd *abfd; | |
413 | arelent *reloc_entry; | |
414 | asymbol *symbol; | |
415 | PTR data; | |
416 | asection *input_section; | |
417 | bfd *output_bfd; | |
418 | char **error_message ATTRIBUTE_UNUSED; | |
419 | { | |
420 | reloc_howto_type *howto = reloc_entry->howto; | |
421 | bfd_vma relocation; | |
422 | bfd_vma insn; | |
eea6121a | 423 | bfd_size_type sz; |
bd1ea41b MS |
424 | |
425 | if (output_bfd != (bfd *) NULL | |
426 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
427 | && (! howto->partial_inplace | |
428 | || reloc_entry->addend == 0)) | |
429 | { | |
430 | reloc_entry->address += input_section->output_offset; | |
431 | return bfd_reloc_ok; | |
432 | } | |
433 | if (output_bfd != NULL) | |
434 | return bfd_reloc_continue; | |
435 | ||
eea6121a AM |
436 | sz = input_section->rawsize ? input_section->rawsize : input_section->size; |
437 | if (reloc_entry->address > sz) | |
bd1ea41b MS |
438 | return bfd_reloc_outofrange; |
439 | ||
440 | relocation = (symbol->value | |
441 | + symbol->section->output_section->vma | |
442 | + symbol->section->output_offset); | |
443 | relocation += reloc_entry->addend; | |
444 | if (howto->pc_relative) | |
445 | { | |
446 | relocation -= (input_section->output_section->vma | |
447 | + input_section->output_offset); | |
448 | relocation -= reloc_entry->address; | |
449 | } | |
450 | ||
451 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
452 | insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; | |
453 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
454 | ||
455 | if ((bfd_signed_vma) relocation < - 0x80000 | |
456 | || (bfd_signed_vma) relocation > 0x7ffff) | |
457 | return bfd_reloc_overflow; | |
458 | else | |
459 | return bfd_reloc_ok; | |
460 | } | |
461 | ||
b34976b6 | 462 | static bfd_boolean |
a85d7ed0 NC |
463 | elf_s390_is_local_label_name (abfd, name) |
464 | bfd *abfd; | |
465 | const char *name; | |
466 | { | |
467 | if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) | |
b34976b6 | 468 | return TRUE; |
a85d7ed0 NC |
469 | |
470 | return _bfd_elf_is_local_label_name (abfd, name); | |
471 | } | |
472 | ||
473 | /* Functions for the 390 ELF linker. */ | |
474 | ||
475 | /* The name of the dynamic interpreter. This is put in the .interp | |
476 | section. */ | |
477 | ||
478 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
479 | ||
64285810 MS |
480 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
481 | copying dynamic variables from a shared lib into an app's dynbss | |
482 | section, and instead use a dynamic relocation to point into the | |
483 | shared lib. */ | |
484 | #define ELIMINATE_COPY_RELOCS 1 | |
485 | ||
a85d7ed0 NC |
486 | /* The size in bytes of the first entry in the procedure linkage table. */ |
487 | #define PLT_FIRST_ENTRY_SIZE 32 | |
488 | /* The size in bytes of an entry in the procedure linkage table. */ | |
99c79b2e | 489 | #define PLT_ENTRY_SIZE 32 |
a85d7ed0 NC |
490 | |
491 | #define GOT_ENTRY_SIZE 8 | |
492 | ||
493 | /* The first three entries in a procedure linkage table are reserved, | |
494 | and the initial contents are unimportant (we zero them out). | |
495 | Subsequent entries look like this. See the SVR4 ABI 386 | |
496 | supplement to see how this works. */ | |
497 | ||
498 | /* For the s390, simple addr offset can only be 0 - 4096. | |
499 | To use the full 16777216 TB address space, several instructions | |
500 | are needed to load an address in a register and execute | |
501 | a branch( or just saving the address) | |
502 | ||
99c79b2e | 503 | Furthermore, only r 0 and 1 are free to use!!! */ |
a85d7ed0 NC |
504 | |
505 | /* The first 3 words in the GOT are then reserved. | |
506 | Word 0 is the address of the dynamic table. | |
507 | Word 1 is a pointer to a structure describing the object | |
508 | Word 2 is used to point to the loader entry address. | |
509 | ||
510 | The code for PLT entries looks like this: | |
511 | ||
512 | The GOT holds the address in the PLT to be executed. | |
513 | The loader then gets: | |
514 | 24(15) = Pointer to the structure describing the object. | |
99c79b2e | 515 | 28(15) = Offset in symbol table |
a85d7ed0 NC |
516 | The loader must then find the module where the function is |
517 | and insert the address in the GOT. | |
518 | ||
519 | PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1 | |
520 | LG 1,0(1) # 6 bytes Load address from GOT in r1 | |
521 | BCR 15,1 # 2 bytes Jump to address | |
522 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
523 | LGF 1,12(1) # 6 bytes Load offset in symbl table in r1 | |
524 | BRCL 15,-x # 6 bytes Jump to start of PLT | |
525 | .long ? # 4 bytes offset into symbol table | |
526 | ||
527 | Total = 32 bytes per PLT entry | |
528 | Fixup at offset 2: relative address to GOT entry | |
529 | Fixup at offset 22: relative branch to PLT0 | |
530 | Fixup at offset 28: 32 bit offset into symbol table | |
531 | ||
532 | A 32 bit offset into the symbol table is enough. It allows for symbol | |
533 | tables up to a size of 2 gigabyte. A single dynamic object (the main | |
534 | program, any shared library) is limited to 4GB in size and I want to see | |
535 | the program that manages to have a symbol table of more than 2 GB with a | |
536 | total size of at max 4 GB. */ | |
537 | ||
dc810e39 AM |
538 | #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000 |
539 | #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310 | |
540 | #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004 | |
541 | #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10 | |
542 | #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c | |
543 | #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4 | |
544 | #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000 | |
545 | #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000 | |
a85d7ed0 NC |
546 | |
547 | /* The first PLT entry pushes the offset into the symbol table | |
548 | from R1 onto the stack at 8(15) and the loader object info | |
549 | at 12(15), loads the loader address in R1 and jumps to it. */ | |
550 | ||
551 | /* The first entry in the PLT: | |
552 | ||
553 | PLT0: | |
554 | STG 1,56(15) # r1 contains the offset into the symbol table | |
555 | LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table | |
556 | MVC 48(8,15),8(1) # move loader ino (object struct address) to stack | |
557 | LG 1,16(1) # get entry address of loader | |
558 | BCR 15,1 # jump to loader | |
559 | ||
560 | Fixup at offset 8: relative address to start of GOT. */ | |
561 | ||
dc810e39 AM |
562 | #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038 |
563 | #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010 | |
564 | #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000 | |
565 | #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030 | |
566 | #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310 | |
567 | #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004 | |
568 | #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700 | |
569 | #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700 | |
a85d7ed0 NC |
570 | |
571 | /* The s390 linker needs to keep track of the number of relocs that it | |
0451c93c MS |
572 | decides to copy as dynamic relocs in check_relocs for each symbol. |
573 | This is so that it can later discard them if they are found to be | |
574 | unnecessary. We store the information in a field extending the | |
575 | regular ELF linker hash table. */ | |
a85d7ed0 | 576 | |
0451c93c | 577 | struct elf_s390_dyn_relocs |
a85d7ed0 | 578 | { |
0451c93c MS |
579 | struct elf_s390_dyn_relocs *next; |
580 | ||
581 | /* The input section of the reloc. */ | |
582 | asection *sec; | |
583 | ||
584 | /* Total number of relocs copied for the input section. */ | |
a85d7ed0 | 585 | bfd_size_type count; |
0451c93c MS |
586 | |
587 | /* Number of pc-relative relocs copied for the input section. */ | |
588 | bfd_size_type pc_count; | |
a85d7ed0 NC |
589 | }; |
590 | ||
591 | /* s390 ELF linker hash entry. */ | |
592 | ||
593 | struct elf_s390_link_hash_entry | |
594 | { | |
0451c93c | 595 | struct elf_link_hash_entry elf; |
a85d7ed0 | 596 | |
0451c93c MS |
597 | /* Track dynamic relocs copied for this symbol. */ |
598 | struct elf_s390_dyn_relocs *dyn_relocs; | |
5236c819 MS |
599 | |
600 | /* Number of GOTPLT references for a function. */ | |
601 | bfd_signed_vma gotplt_refcount; | |
69fc87f1 MS |
602 | |
603 | #define GOT_UNKNOWN 0 | |
604 | #define GOT_NORMAL 1 | |
605 | #define GOT_TLS_GD 2 | |
606 | #define GOT_TLS_IE 3 | |
607 | #define GOT_TLS_IE_NLT 3 | |
608 | unsigned char tls_type; | |
a85d7ed0 NC |
609 | }; |
610 | ||
69fc87f1 MS |
611 | #define elf_s390_hash_entry(ent) \ |
612 | ((struct elf_s390_link_hash_entry *)(ent)) | |
613 | ||
614 | struct elf_s390_obj_tdata | |
615 | { | |
616 | struct elf_obj_tdata root; | |
617 | ||
618 | /* tls_type for each local got entry. */ | |
619 | char *local_got_tls_type; | |
620 | }; | |
621 | ||
622 | #define elf_s390_tdata(abfd) \ | |
623 | ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) | |
624 | ||
625 | #define elf_s390_local_got_tls_type(abfd) \ | |
626 | (elf_s390_tdata (abfd)->local_got_tls_type) | |
627 | ||
628 | static bfd_boolean | |
629 | elf_s390_mkobject (abfd) | |
630 | bfd *abfd; | |
631 | { | |
632 | bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); | |
633 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
634 | if (abfd->tdata.any == NULL) | |
635 | return FALSE; | |
636 | return TRUE; | |
637 | } | |
638 | ||
639 | static bfd_boolean | |
640 | elf_s390_object_p (abfd) | |
641 | bfd *abfd; | |
642 | { | |
69fc87f1 MS |
643 | /* Set the right machine number for an s390 elf32 file. */ |
644 | return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); | |
645 | } | |
646 | ||
a85d7ed0 NC |
647 | /* s390 ELF linker hash table. */ |
648 | ||
649 | struct elf_s390_link_hash_table | |
650 | { | |
0451c93c | 651 | struct elf_link_hash_table elf; |
a85d7ed0 | 652 | |
0451c93c MS |
653 | /* Short-cuts to get to dynamic linker sections. */ |
654 | asection *sgot; | |
655 | asection *sgotplt; | |
656 | asection *srelgot; | |
657 | asection *splt; | |
658 | asection *srelplt; | |
659 | asection *sdynbss; | |
660 | asection *srelbss; | |
ec338859 | 661 | |
69fc87f1 MS |
662 | union { |
663 | bfd_signed_vma refcount; | |
664 | bfd_vma offset; | |
665 | } tls_ldm_got; | |
666 | ||
ec338859 AM |
667 | /* Small local sym to section mapping cache. */ |
668 | struct sym_sec_cache sym_sec; | |
0451c93c | 669 | }; |
a85d7ed0 NC |
670 | |
671 | /* Get the s390 ELF linker hash table from a link_info structure. */ | |
672 | ||
673 | #define elf_s390_hash_table(p) \ | |
674 | ((struct elf_s390_link_hash_table *) ((p)->hash)) | |
675 | ||
676 | /* Create an entry in an s390 ELF linker hash table. */ | |
677 | ||
678 | static struct bfd_hash_entry * | |
0451c93c | 679 | link_hash_newfunc (entry, table, string) |
a85d7ed0 NC |
680 | struct bfd_hash_entry *entry; |
681 | struct bfd_hash_table *table; | |
682 | const char *string; | |
683 | { | |
a85d7ed0 NC |
684 | /* Allocate the structure if it has not already been allocated by a |
685 | subclass. */ | |
0451c93c MS |
686 | if (entry == NULL) |
687 | { | |
688 | entry = bfd_hash_allocate (table, | |
689 | sizeof (struct elf_s390_link_hash_entry)); | |
690 | if (entry == NULL) | |
691 | return entry; | |
692 | } | |
a85d7ed0 NC |
693 | |
694 | /* Call the allocation method of the superclass. */ | |
0451c93c MS |
695 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
696 | if (entry != NULL) | |
a85d7ed0 | 697 | { |
0451c93c MS |
698 | struct elf_s390_link_hash_entry *eh; |
699 | ||
700 | eh = (struct elf_s390_link_hash_entry *) entry; | |
701 | eh->dyn_relocs = NULL; | |
5236c819 | 702 | eh->gotplt_refcount = 0; |
69fc87f1 | 703 | eh->tls_type = GOT_UNKNOWN; |
a85d7ed0 NC |
704 | } |
705 | ||
0451c93c | 706 | return entry; |
a85d7ed0 NC |
707 | } |
708 | ||
709 | /* Create an s390 ELF linker hash table. */ | |
710 | ||
711 | static struct bfd_link_hash_table * | |
712 | elf_s390_link_hash_table_create (abfd) | |
713 | bfd *abfd; | |
714 | { | |
715 | struct elf_s390_link_hash_table *ret; | |
dc810e39 | 716 | bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); |
a85d7ed0 | 717 | |
e2d34d7d | 718 | ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); |
0451c93c | 719 | if (ret == NULL) |
a85d7ed0 NC |
720 | return NULL; |
721 | ||
0451c93c | 722 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
a85d7ed0 | 723 | { |
e2d34d7d | 724 | free (ret); |
a85d7ed0 NC |
725 | return NULL; |
726 | } | |
727 | ||
0451c93c MS |
728 | ret->sgot = NULL; |
729 | ret->sgotplt = NULL; | |
730 | ret->srelgot = NULL; | |
731 | ret->splt = NULL; | |
732 | ret->srelplt = NULL; | |
733 | ret->sdynbss = NULL; | |
734 | ret->srelbss = NULL; | |
69fc87f1 | 735 | ret->tls_ldm_got.refcount = 0; |
ec338859 | 736 | ret->sym_sec.abfd = NULL; |
0451c93c MS |
737 | |
738 | return &ret->elf.root; | |
739 | } | |
740 | ||
741 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
742 | shortcuts to them in our hash table. */ | |
743 | ||
b34976b6 | 744 | static bfd_boolean |
0451c93c MS |
745 | create_got_section (dynobj, info) |
746 | bfd *dynobj; | |
747 | struct bfd_link_info *info; | |
748 | { | |
749 | struct elf_s390_link_hash_table *htab; | |
750 | ||
751 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 752 | return FALSE; |
0451c93c MS |
753 | |
754 | htab = elf_s390_hash_table (info); | |
755 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
756 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
757 | if (!htab->sgot || !htab->sgotplt) | |
758 | abort (); | |
759 | ||
760 | htab->srelgot = bfd_make_section (dynobj, ".rela.got"); | |
761 | if (htab->srelgot == NULL | |
762 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
763 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
764 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
765 | | SEC_READONLY)) | |
99881371 | 766 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
b34976b6 AM |
767 | return FALSE; |
768 | return TRUE; | |
0451c93c MS |
769 | } |
770 | ||
771 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
772 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
773 | hash table. */ | |
774 | ||
b34976b6 | 775 | static bfd_boolean |
0451c93c MS |
776 | elf_s390_create_dynamic_sections (dynobj, info) |
777 | bfd *dynobj; | |
778 | struct bfd_link_info *info; | |
779 | { | |
780 | struct elf_s390_link_hash_table *htab; | |
781 | ||
782 | htab = elf_s390_hash_table (info); | |
783 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 784 | return FALSE; |
0451c93c MS |
785 | |
786 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 787 | return FALSE; |
0451c93c MS |
788 | |
789 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
790 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
791 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
792 | if (!info->shared) | |
793 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
794 | ||
795 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
796 | || (!info->shared && !htab->srelbss)) | |
797 | abort (); | |
798 | ||
b34976b6 | 799 | return TRUE; |
a85d7ed0 NC |
800 | } |
801 | ||
0451c93c MS |
802 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
803 | ||
804 | static void | |
b48fa14c | 805 | elf_s390_copy_indirect_symbol (bed, dir, ind) |
9c5bfbb7 | 806 | const struct elf_backend_data *bed; |
0451c93c MS |
807 | struct elf_link_hash_entry *dir, *ind; |
808 | { | |
809 | struct elf_s390_link_hash_entry *edir, *eind; | |
810 | ||
811 | edir = (struct elf_s390_link_hash_entry *) dir; | |
812 | eind = (struct elf_s390_link_hash_entry *) ind; | |
813 | ||
814 | if (eind->dyn_relocs != NULL) | |
815 | { | |
816 | if (edir->dyn_relocs != NULL) | |
817 | { | |
818 | struct elf_s390_dyn_relocs **pp; | |
819 | struct elf_s390_dyn_relocs *p; | |
820 | ||
821 | if (ind->root.type == bfd_link_hash_indirect) | |
822 | abort (); | |
823 | ||
824 | /* Add reloc counts against the weak sym to the strong sym | |
825 | list. Merge any entries against the same section. */ | |
826 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
827 | { | |
828 | struct elf_s390_dyn_relocs *q; | |
829 | ||
830 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
831 | if (q->sec == p->sec) | |
832 | { | |
833 | q->pc_count += p->pc_count; | |
834 | q->count += p->count; | |
835 | *pp = p->next; | |
836 | break; | |
837 | } | |
838 | if (q == NULL) | |
839 | pp = &p->next; | |
840 | } | |
841 | *pp = edir->dyn_relocs; | |
842 | } | |
843 | ||
844 | edir->dyn_relocs = eind->dyn_relocs; | |
845 | eind->dyn_relocs = NULL; | |
846 | } | |
847 | ||
69fc87f1 MS |
848 | if (ind->root.type == bfd_link_hash_indirect |
849 | && dir->got.refcount <= 0) | |
850 | { | |
851 | edir->tls_type = eind->tls_type; | |
852 | eind->tls_type = GOT_UNKNOWN; | |
853 | } | |
854 | ||
64285810 MS |
855 | if (ELIMINATE_COPY_RELOCS |
856 | && ind->root.type != bfd_link_hash_indirect | |
857 | && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
858 | /* If called to transfer flags for a weakdef during processing | |
859 | of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF. | |
860 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
861 | dir->elf_link_hash_flags |= | |
862 | (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC | |
863 | | ELF_LINK_HASH_REF_REGULAR | |
3addb0a9 DJ |
864 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK |
865 | | ELF_LINK_HASH_NEEDS_PLT)); | |
64285810 MS |
866 | else |
867 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); | |
0451c93c | 868 | } |
a85d7ed0 | 869 | |
69fc87f1 MS |
870 | static int |
871 | elf_s390_tls_transition (info, r_type, is_local) | |
872 | struct bfd_link_info *info; | |
873 | int r_type; | |
874 | int is_local; | |
875 | { | |
876 | if (info->shared) | |
877 | return r_type; | |
878 | ||
879 | switch (r_type) | |
880 | { | |
881 | case R_390_TLS_GD64: | |
882 | case R_390_TLS_IE64: | |
883 | if (is_local) | |
884 | return R_390_TLS_LE64; | |
885 | return R_390_TLS_IE64; | |
886 | case R_390_TLS_GOTIE64: | |
887 | if (is_local) | |
888 | return R_390_TLS_LE64; | |
889 | return R_390_TLS_GOTIE64; | |
890 | case R_390_TLS_LDM64: | |
891 | return R_390_TLS_LE64; | |
892 | } | |
893 | ||
894 | return r_type; | |
895 | } | |
896 | ||
a85d7ed0 NC |
897 | /* Look through the relocs for a section during the first phase, and |
898 | allocate space in the global offset table or procedure linkage | |
899 | table. */ | |
900 | ||
b34976b6 | 901 | static bfd_boolean |
a85d7ed0 NC |
902 | elf_s390_check_relocs (abfd, info, sec, relocs) |
903 | bfd *abfd; | |
904 | struct bfd_link_info *info; | |
905 | asection *sec; | |
906 | const Elf_Internal_Rela *relocs; | |
907 | { | |
0451c93c | 908 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
909 | Elf_Internal_Shdr *symtab_hdr; |
910 | struct elf_link_hash_entry **sym_hashes; | |
a85d7ed0 NC |
911 | const Elf_Internal_Rela *rel; |
912 | const Elf_Internal_Rela *rel_end; | |
a85d7ed0 | 913 | asection *sreloc; |
5236c819 | 914 | bfd_signed_vma *local_got_refcounts; |
69fc87f1 | 915 | int tls_type, old_tls_type; |
a85d7ed0 | 916 | |
1049f94e | 917 | if (info->relocatable) |
b34976b6 | 918 | return TRUE; |
a85d7ed0 | 919 | |
0451c93c | 920 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
921 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
922 | sym_hashes = elf_sym_hashes (abfd); | |
5236c819 | 923 | local_got_refcounts = elf_local_got_refcounts (abfd); |
a85d7ed0 | 924 | |
a85d7ed0 NC |
925 | sreloc = NULL; |
926 | ||
927 | rel_end = relocs + sec->reloc_count; | |
928 | for (rel = relocs; rel < rel_end; rel++) | |
929 | { | |
69fc87f1 | 930 | unsigned int r_type; |
a85d7ed0 NC |
931 | unsigned long r_symndx; |
932 | struct elf_link_hash_entry *h; | |
933 | ||
934 | r_symndx = ELF64_R_SYM (rel->r_info); | |
935 | ||
0451c93c MS |
936 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
937 | { | |
938 | (*_bfd_error_handler) (_("%s: bad symbol index: %d"), | |
939 | bfd_archive_filename (abfd), | |
940 | r_symndx); | |
b34976b6 | 941 | return FALSE; |
0451c93c MS |
942 | } |
943 | ||
a85d7ed0 NC |
944 | if (r_symndx < symtab_hdr->sh_info) |
945 | h = NULL; | |
946 | else | |
99c79b2e | 947 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
a85d7ed0 | 948 | |
5236c819 MS |
949 | /* Create got section and local_got_refcounts array if they |
950 | are needed. */ | |
69fc87f1 MS |
951 | r_type = elf_s390_tls_transition (info, |
952 | ELF64_R_TYPE (rel->r_info), | |
953 | h == NULL); | |
954 | switch (r_type) | |
a85d7ed0 NC |
955 | { |
956 | case R_390_GOT12: | |
947216bf | 957 | case R_390_GOT16: |
bd1ea41b | 958 | case R_390_GOT20: |
a85d7ed0 NC |
959 | case R_390_GOT32: |
960 | case R_390_GOT64: | |
961 | case R_390_GOTENT: | |
5236c819 MS |
962 | case R_390_GOTPLT12: |
963 | case R_390_GOTPLT16: | |
bd1ea41b | 964 | case R_390_GOTPLT20: |
5236c819 MS |
965 | case R_390_GOTPLT32: |
966 | case R_390_GOTPLT64: | |
967 | case R_390_GOTPLTENT: | |
69fc87f1 MS |
968 | case R_390_TLS_GD64: |
969 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 970 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
971 | case R_390_TLS_GOTIE64: |
972 | case R_390_TLS_IEENT: | |
973 | case R_390_TLS_IE64: | |
974 | case R_390_TLS_LDM64: | |
5236c819 MS |
975 | if (h == NULL |
976 | && local_got_refcounts == NULL) | |
a85d7ed0 | 977 | { |
5236c819 | 978 | bfd_size_type size; |
0451c93c | 979 | |
5236c819 | 980 | size = symtab_hdr->sh_info; |
69fc87f1 | 981 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
5236c819 MS |
982 | local_got_refcounts = ((bfd_signed_vma *) |
983 | bfd_zalloc (abfd, size)); | |
a85d7ed0 | 984 | if (local_got_refcounts == NULL) |
5236c819 MS |
985 | return FALSE; |
986 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
69fc87f1 MS |
987 | elf_s390_local_got_tls_type (abfd) |
988 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
a85d7ed0 | 989 | } |
5236c819 MS |
990 | /* Fall through. */ |
991 | case R_390_GOTOFF16: | |
992 | case R_390_GOTOFF32: | |
993 | case R_390_GOTOFF64: | |
0451c93c MS |
994 | case R_390_GOTPC: |
995 | case R_390_GOTPCDBL: | |
996 | if (htab->sgot == NULL) | |
997 | { | |
998 | if (htab->elf.dynobj == NULL) | |
999 | htab->elf.dynobj = abfd; | |
1000 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 1001 | return FALSE; |
0451c93c | 1002 | } |
5236c819 MS |
1003 | } |
1004 | ||
69fc87f1 | 1005 | switch (r_type) |
5236c819 | 1006 | { |
5236c819 MS |
1007 | case R_390_GOTOFF16: |
1008 | case R_390_GOTOFF32: | |
1009 | case R_390_GOTOFF64: | |
1010 | case R_390_GOTPC: | |
1011 | case R_390_GOTPCDBL: | |
1012 | /* Got is created, nothing to be done. */ | |
0451c93c | 1013 | break; |
ec338859 | 1014 | |
947216bf | 1015 | case R_390_PLT16DBL: |
a85d7ed0 NC |
1016 | case R_390_PLT32: |
1017 | case R_390_PLT32DBL: | |
1018 | case R_390_PLT64: | |
5236c819 MS |
1019 | case R_390_PLTOFF16: |
1020 | case R_390_PLTOFF32: | |
1021 | case R_390_PLTOFF64: | |
a85d7ed0 | 1022 | /* This symbol requires a procedure linkage table entry. We |
947216bf AM |
1023 | actually build the entry in adjust_dynamic_symbol, |
1024 | because this might be a case of linking PIC code which is | |
1025 | never referenced by a dynamic object, in which case we | |
1026 | don't need to generate a procedure linkage table entry | |
1027 | after all. */ | |
ec338859 | 1028 | |
a85d7ed0 | 1029 | /* If this is a local symbol, we resolve it directly without |
947216bf | 1030 | creating a procedure linkage table entry. */ |
5236c819 MS |
1031 | if (h != NULL) |
1032 | { | |
1033 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
1034 | h->plt.refcount += 1; | |
1035 | } | |
1036 | break; | |
ec338859 | 1037 | |
5236c819 MS |
1038 | case R_390_GOTPLT12: |
1039 | case R_390_GOTPLT16: | |
bd1ea41b | 1040 | case R_390_GOTPLT20: |
5236c819 MS |
1041 | case R_390_GOTPLT32: |
1042 | case R_390_GOTPLT64: | |
1043 | case R_390_GOTPLTENT: | |
1044 | /* This symbol requires either a procedure linkage table entry | |
1045 | or an entry in the local got. We actually build the entry | |
1046 | in adjust_dynamic_symbol because whether this is really a | |
1047 | global reference can change and with it the fact if we have | |
1048 | to create a plt entry or a local got entry. To be able to | |
1049 | make a once global symbol a local one we have to keep track | |
1050 | of the number of gotplt references that exist for this | |
1051 | symbol. */ | |
1052 | if (h != NULL) | |
1053 | { | |
1054 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; | |
1055 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
1056 | h->plt.refcount += 1; | |
1057 | } | |
69fc87f1 MS |
1058 | else |
1059 | local_got_refcounts[r_symndx] += 1; | |
1060 | break; | |
1061 | ||
1062 | case R_390_TLS_LDM64: | |
1063 | htab->tls_ldm_got.refcount += 1; | |
1064 | break; | |
1065 | ||
1066 | case R_390_TLS_IE64: | |
1067 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1068 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1069 | case R_390_TLS_GOTIE64: |
1070 | case R_390_TLS_IEENT: | |
1071 | if (info->shared) | |
1072 | info->flags |= DF_STATIC_TLS; | |
1073 | /* Fall through */ | |
1074 | ||
1075 | case R_390_GOT12: | |
26e41594 | 1076 | case R_390_GOT16: |
bd1ea41b | 1077 | case R_390_GOT20: |
69fc87f1 MS |
1078 | case R_390_GOT32: |
1079 | case R_390_GOT64: | |
1080 | case R_390_GOTENT: | |
1081 | case R_390_TLS_GD64: | |
1082 | /* This symbol requires a global offset table entry. */ | |
1083 | switch (r_type) | |
1084 | { | |
1085 | default: | |
1086 | case R_390_GOT12: | |
1087 | case R_390_GOT16: | |
bd1ea41b | 1088 | case R_390_GOT20: |
69fc87f1 MS |
1089 | case R_390_GOT32: |
1090 | case R_390_GOTENT: | |
1091 | tls_type = GOT_NORMAL; | |
1092 | break; | |
1093 | case R_390_TLS_GD64: | |
1094 | tls_type = GOT_TLS_GD; | |
1095 | break; | |
1096 | case R_390_TLS_IE64: | |
1097 | case R_390_TLS_GOTIE64: | |
1098 | tls_type = GOT_TLS_IE; | |
1099 | break; | |
1100 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1101 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1102 | case R_390_TLS_IEENT: |
1103 | tls_type = GOT_TLS_IE_NLT; | |
1104 | break; | |
1105 | } | |
1106 | ||
1107 | if (h != NULL) | |
1108 | { | |
1109 | h->got.refcount += 1; | |
1110 | old_tls_type = elf_s390_hash_entry(h)->tls_type; | |
1111 | } | |
5236c819 MS |
1112 | else |
1113 | { | |
1114 | local_got_refcounts[r_symndx] += 1; | |
69fc87f1 | 1115 | old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; |
5236c819 | 1116 | } |
69fc87f1 MS |
1117 | /* If a TLS symbol is accessed using IE at least once, |
1118 | there is no point to use dynamic model for it. */ | |
1119 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) | |
1120 | { | |
1121 | if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) | |
1122 | { | |
1123 | (*_bfd_error_handler) | |
1124 | (_("%s: `%s' accessed both as normal and thread local symbol"), | |
1125 | bfd_archive_filename (abfd), h->root.root.string); | |
1126 | return FALSE; | |
1127 | } | |
1128 | if (old_tls_type > tls_type) | |
1129 | tls_type = old_tls_type; | |
1130 | } | |
1131 | ||
1132 | if (old_tls_type != tls_type) | |
1133 | { | |
1134 | if (h != NULL) | |
1135 | elf_s390_hash_entry (h)->tls_type = tls_type; | |
1136 | else | |
1137 | elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1138 | } | |
1139 | ||
1140 | if (r_type != R_390_TLS_IE64) | |
1141 | break; | |
1142 | /* Fall through */ | |
1143 | ||
1144 | case R_390_TLS_LE64: | |
1145 | if (!info->shared) | |
1146 | break; | |
1147 | info->flags |= DF_STATIC_TLS; | |
1148 | /* Fall through */ | |
ec338859 | 1149 | |
947216bf AM |
1150 | case R_390_8: |
1151 | case R_390_16: | |
a85d7ed0 NC |
1152 | case R_390_32: |
1153 | case R_390_64: | |
947216bf AM |
1154 | case R_390_PC16: |
1155 | case R_390_PC16DBL: | |
a85d7ed0 NC |
1156 | case R_390_PC32: |
1157 | case R_390_PC32DBL: | |
1158 | case R_390_PC64: | |
0451c93c MS |
1159 | if (h != NULL && !info->shared) |
1160 | { | |
1161 | /* If this reloc is in a read-only section, we might | |
1162 | need a copy reloc. We can't check reliably at this | |
1163 | stage whether the section is read-only, as input | |
1164 | sections have not yet been mapped to output sections. | |
1165 | Tentatively set the flag for now, and correct in | |
1166 | adjust_dynamic_symbol. */ | |
1167 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
ec338859 | 1168 | |
0451c93c MS |
1169 | /* We may need a .plt entry if the function this reloc |
1170 | refers to is in a shared lib. */ | |
1171 | h->plt.refcount += 1; | |
1172 | } | |
ec338859 | 1173 | |
a85d7ed0 | 1174 | /* If we are creating a shared library, and this is a reloc |
0451c93c MS |
1175 | against a global symbol, or a non PC relative reloc |
1176 | against a local symbol, then we need to copy the reloc | |
1177 | into the shared library. However, if we are linking with | |
1178 | -Bsymbolic, we do not need to copy a reloc against a | |
1179 | global symbol which is defined in an object we are | |
1180 | including in the link (i.e., DEF_REGULAR is set). At | |
1181 | this point we have not seen all the input files, so it is | |
1182 | possible that DEF_REGULAR is not set now but will be set | |
1183 | later (it is never cleared). In case of a weak definition, | |
1184 | DEF_REGULAR may be cleared later by a strong definition in | |
1185 | a shared library. We account for that possibility below by | |
1186 | storing information in the relocs_copied field of the hash | |
1187 | table entry. A similar situation occurs when creating | |
1188 | shared libraries and symbol visibility changes render the | |
1189 | symbol local. | |
1190 | ||
1191 | If on the other hand, we are creating an executable, we | |
1192 | may need to keep relocations for symbols satisfied by a | |
1193 | dynamic library if we manage to avoid copy relocs for the | |
1194 | symbol. */ | |
1195 | if ((info->shared | |
1196 | && (sec->flags & SEC_ALLOC) != 0 | |
1197 | && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 | |
1198 | && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL | |
1199 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32 | |
1200 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL | |
1201 | && ELF64_R_TYPE (rel->r_info) != R_390_PC64) | |
1202 | || (h != NULL | |
1203 | && (! info->symbolic | |
1204 | || h->root.type == bfd_link_hash_defweak | |
1205 | || (h->elf_link_hash_flags | |
1206 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
64285810 MS |
1207 | || (ELIMINATE_COPY_RELOCS |
1208 | && !info->shared | |
0451c93c MS |
1209 | && (sec->flags & SEC_ALLOC) != 0 |
1210 | && h != NULL | |
1211 | && (h->root.type == bfd_link_hash_defweak | |
1212 | || (h->elf_link_hash_flags | |
1213 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
a85d7ed0 | 1214 | { |
ec338859 AM |
1215 | struct elf_s390_dyn_relocs *p; |
1216 | struct elf_s390_dyn_relocs **head; | |
1217 | ||
0451c93c MS |
1218 | /* We must copy these reloc types into the output file. |
1219 | Create a reloc section in dynobj and make room for | |
1220 | this reloc. */ | |
a85d7ed0 NC |
1221 | if (sreloc == NULL) |
1222 | { | |
1223 | const char *name; | |
0451c93c | 1224 | bfd *dynobj; |
ec338859 | 1225 | |
a85d7ed0 NC |
1226 | name = (bfd_elf_string_from_elf_section |
1227 | (abfd, | |
1228 | elf_elfheader (abfd)->e_shstrndx, | |
1229 | elf_section_data (sec)->rel_hdr.sh_name)); | |
1230 | if (name == NULL) | |
b34976b6 | 1231 | return FALSE; |
ec338859 | 1232 | |
0451c93c MS |
1233 | if (strncmp (name, ".rela", 5) != 0 |
1234 | || strcmp (bfd_get_section_name (abfd, sec), | |
1235 | name + 5) != 0) | |
1236 | { | |
1237 | (*_bfd_error_handler) | |
1238 | (_("%s: bad relocation section name `%s\'"), | |
1239 | bfd_archive_filename (abfd), name); | |
1240 | } | |
ec338859 | 1241 | |
0451c93c MS |
1242 | if (htab->elf.dynobj == NULL) |
1243 | htab->elf.dynobj = abfd; | |
a85d7ed0 | 1244 | |
0451c93c | 1245 | dynobj = htab->elf.dynobj; |
a85d7ed0 NC |
1246 | sreloc = bfd_get_section_by_name (dynobj, name); |
1247 | if (sreloc == NULL) | |
1248 | { | |
1249 | flagword flags; | |
ec338859 | 1250 | |
a85d7ed0 NC |
1251 | sreloc = bfd_make_section (dynobj, name); |
1252 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
1253 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1254 | if ((sec->flags & SEC_ALLOC) != 0) | |
1255 | flags |= SEC_ALLOC | SEC_LOAD; | |
1256 | if (sreloc == NULL | |
1257 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
99881371 | 1258 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
b34976b6 | 1259 | return FALSE; |
a85d7ed0 | 1260 | } |
0451c93c | 1261 | elf_section_data (sec)->sreloc = sreloc; |
a85d7ed0 | 1262 | } |
ec338859 | 1263 | |
0451c93c MS |
1264 | /* If this is a global symbol, we count the number of |
1265 | relocations we need for this symbol. */ | |
1266 | if (h != NULL) | |
a85d7ed0 | 1267 | { |
ec338859 | 1268 | head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; |
0451c93c MS |
1269 | } |
1270 | else | |
1271 | { | |
ec338859 AM |
1272 | /* Track dynamic relocs needed for local syms too. |
1273 | We really need local syms available to do this | |
1274 | easily. Oh well. */ | |
1275 | ||
1276 | asection *s; | |
1277 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
1278 | sec, r_symndx); | |
1279 | if (s == NULL) | |
b34976b6 | 1280 | return FALSE; |
ec338859 AM |
1281 | |
1282 | head = ((struct elf_s390_dyn_relocs **) | |
1283 | &elf_section_data (s)->local_dynrel); | |
1284 | } | |
1285 | ||
1286 | p = *head; | |
1287 | if (p == NULL || p->sec != sec) | |
1288 | { | |
1289 | bfd_size_type amt = sizeof *p; | |
1290 | p = ((struct elf_s390_dyn_relocs *) | |
1291 | bfd_alloc (htab->elf.dynobj, amt)); | |
1292 | if (p == NULL) | |
b34976b6 | 1293 | return FALSE; |
ec338859 AM |
1294 | p->next = *head; |
1295 | *head = p; | |
1296 | p->sec = sec; | |
1297 | p->count = 0; | |
1298 | p->pc_count = 0; | |
a85d7ed0 | 1299 | } |
ec338859 AM |
1300 | |
1301 | p->count += 1; | |
1302 | if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 | |
1303 | || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL | |
1304 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32 | |
1305 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL | |
1306 | || ELF64_R_TYPE (rel->r_info) == R_390_PC64) | |
1307 | p->pc_count += 1; | |
a85d7ed0 | 1308 | } |
a85d7ed0 | 1309 | break; |
ec338859 | 1310 | |
a85d7ed0 NC |
1311 | /* This relocation describes the C++ object vtable hierarchy. |
1312 | Reconstruct it for later use during GC. */ | |
947216bf | 1313 | case R_390_GNU_VTINHERIT: |
c152c796 | 1314 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 1315 | return FALSE; |
947216bf | 1316 | break; |
ec338859 | 1317 | |
a85d7ed0 NC |
1318 | /* This relocation describes which C++ vtable entries are actually |
1319 | used. Record for later use during GC. */ | |
947216bf | 1320 | case R_390_GNU_VTENTRY: |
c152c796 | 1321 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 1322 | return FALSE; |
947216bf | 1323 | break; |
ec338859 | 1324 | |
a85d7ed0 NC |
1325 | default: |
1326 | break; | |
1327 | } | |
1328 | } | |
1329 | ||
b34976b6 | 1330 | return TRUE; |
a85d7ed0 NC |
1331 | } |
1332 | ||
1333 | /* Return the section that should be marked against GC for a given | |
1334 | relocation. */ | |
1335 | ||
1336 | static asection * | |
1e2f5b6e AM |
1337 | elf_s390_gc_mark_hook (sec, info, rel, h, sym) |
1338 | asection *sec; | |
a85d7ed0 NC |
1339 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
1340 | Elf_Internal_Rela *rel; | |
1341 | struct elf_link_hash_entry *h; | |
1342 | Elf_Internal_Sym *sym; | |
1343 | { | |
1344 | if (h != NULL) | |
1345 | { | |
1346 | switch (ELF64_R_TYPE (rel->r_info)) | |
1347 | { | |
1348 | case R_390_GNU_VTINHERIT: | |
1349 | case R_390_GNU_VTENTRY: | |
1350 | break; | |
1351 | ||
1352 | default: | |
1353 | switch (h->root.type) | |
1354 | { | |
1355 | case bfd_link_hash_defined: | |
1356 | case bfd_link_hash_defweak: | |
1357 | return h->root.u.def.section; | |
1358 | ||
1359 | case bfd_link_hash_common: | |
1360 | return h->root.u.c.p->section; | |
1361 | ||
1362 | default: | |
1363 | break; | |
1364 | } | |
1365 | } | |
1366 | } | |
1367 | else | |
1e2f5b6e | 1368 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
a85d7ed0 NC |
1369 | |
1370 | return NULL; | |
1371 | } | |
1372 | ||
1373 | /* Update the got entry reference counts for the section being removed. */ | |
1374 | ||
b34976b6 | 1375 | static bfd_boolean |
a85d7ed0 | 1376 | elf_s390_gc_sweep_hook (abfd, info, sec, relocs) |
0451c93c MS |
1377 | bfd *abfd; |
1378 | struct bfd_link_info *info; | |
1379 | asection *sec; | |
1380 | const Elf_Internal_Rela *relocs; | |
a85d7ed0 NC |
1381 | { |
1382 | Elf_Internal_Shdr *symtab_hdr; | |
1383 | struct elf_link_hash_entry **sym_hashes; | |
1384 | bfd_signed_vma *local_got_refcounts; | |
1385 | const Elf_Internal_Rela *rel, *relend; | |
a85d7ed0 | 1386 | |
ec338859 | 1387 | elf_section_data (sec)->local_dynrel = NULL; |
a85d7ed0 | 1388 | |
0451c93c MS |
1389 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1390 | sym_hashes = elf_sym_hashes (abfd); | |
1391 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
a85d7ed0 NC |
1392 | |
1393 | relend = relocs + sec->reloc_count; | |
1394 | for (rel = relocs; rel < relend; rel++) | |
5236c819 | 1395 | { |
26e41594 AM |
1396 | unsigned long r_symndx; |
1397 | unsigned int r_type; | |
1398 | struct elf_link_hash_entry *h = NULL; | |
1399 | ||
5236c819 | 1400 | r_symndx = ELF64_R_SYM (rel->r_info); |
26e41594 AM |
1401 | if (r_symndx >= symtab_hdr->sh_info) |
1402 | { | |
1403 | struct elf_s390_link_hash_entry *eh; | |
1404 | struct elf_s390_dyn_relocs **pp; | |
1405 | struct elf_s390_dyn_relocs *p; | |
5236c819 | 1406 | |
26e41594 AM |
1407 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1408 | eh = (struct elf_s390_link_hash_entry *) h; | |
5236c819 | 1409 | |
26e41594 AM |
1410 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1411 | if (p->sec == sec) | |
1412 | { | |
1413 | /* Everything must go for SEC. */ | |
1414 | *pp = p->next; | |
1415 | break; | |
1416 | } | |
1417 | } | |
1418 | ||
1419 | r_type = ELF64_R_TYPE (rel->r_info); | |
1420 | r_type = elf_s390_tls_transition (info, r_type, h != NULL); | |
69fc87f1 | 1421 | switch (r_type) |
5236c819 | 1422 | { |
69fc87f1 MS |
1423 | case R_390_TLS_LDM64: |
1424 | if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) | |
1425 | elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; | |
1426 | break; | |
1427 | ||
1428 | case R_390_TLS_GD64: | |
1429 | case R_390_TLS_IE64: | |
1430 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1431 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1432 | case R_390_TLS_GOTIE64: |
1433 | case R_390_TLS_IEENT: | |
5236c819 MS |
1434 | case R_390_GOT12: |
1435 | case R_390_GOT16: | |
bd1ea41b | 1436 | case R_390_GOT20: |
5236c819 MS |
1437 | case R_390_GOT32: |
1438 | case R_390_GOT64: | |
1439 | case R_390_GOTOFF16: | |
1440 | case R_390_GOTOFF32: | |
1441 | case R_390_GOTOFF64: | |
1442 | case R_390_GOTPC: | |
1443 | case R_390_GOTPCDBL: | |
1444 | case R_390_GOTENT: | |
1445 | if (h != NULL) | |
1446 | { | |
1447 | if (h->got.refcount > 0) | |
1448 | h->got.refcount -= 1; | |
1449 | } | |
1450 | else if (local_got_refcounts != NULL) | |
1451 | { | |
1452 | if (local_got_refcounts[r_symndx] > 0) | |
1453 | local_got_refcounts[r_symndx] -= 1; | |
1454 | } | |
26e41594 | 1455 | break; |
a85d7ed0 | 1456 | |
5236c819 MS |
1457 | case R_390_8: |
1458 | case R_390_12: | |
1459 | case R_390_16: | |
bd1ea41b | 1460 | case R_390_20: |
5236c819 MS |
1461 | case R_390_32: |
1462 | case R_390_64: | |
1463 | case R_390_PC16: | |
1464 | case R_390_PC16DBL: | |
1465 | case R_390_PC32: | |
1466 | case R_390_PC32DBL: | |
1467 | case R_390_PC64: | |
26e41594 AM |
1468 | if (info->shared) |
1469 | break; | |
1470 | /* Fall through */ | |
a85d7ed0 | 1471 | |
69fc87f1 MS |
1472 | case R_390_PLT16DBL: |
1473 | case R_390_PLT32: | |
1474 | case R_390_PLT32DBL: | |
1475 | case R_390_PLT64: | |
1476 | case R_390_PLTOFF16: | |
1477 | case R_390_PLTOFF32: | |
1478 | case R_390_PLTOFF64: | |
1479 | if (h != NULL) | |
1480 | { | |
1481 | if (h->plt.refcount > 0) | |
1482 | h->plt.refcount -= 1; | |
1483 | } | |
1484 | break; | |
1485 | ||
1486 | case R_390_GOTPLT12: | |
1487 | case R_390_GOTPLT16: | |
bd1ea41b | 1488 | case R_390_GOTPLT20: |
69fc87f1 MS |
1489 | case R_390_GOTPLT32: |
1490 | case R_390_GOTPLT64: | |
1491 | case R_390_GOTPLTENT: | |
1492 | if (h != NULL) | |
1493 | { | |
1494 | if (h->plt.refcount > 0) | |
1495 | { | |
1496 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; | |
1497 | h->plt.refcount -= 1; | |
1498 | } | |
1499 | } | |
1500 | else if (local_got_refcounts != NULL) | |
1501 | { | |
1502 | if (local_got_refcounts[r_symndx] > 0) | |
1503 | local_got_refcounts[r_symndx] -= 1; | |
1504 | } | |
1505 | break; | |
1506 | ||
5236c819 MS |
1507 | default: |
1508 | break; | |
1509 | } | |
1510 | } | |
a85d7ed0 | 1511 | |
b34976b6 | 1512 | return TRUE; |
a85d7ed0 NC |
1513 | } |
1514 | ||
5236c819 MS |
1515 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
1516 | entry but we found we will not create any. Called when we find we will | |
1517 | not have any PLT for this symbol, by for example | |
1518 | elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, | |
1519 | or elf_s390_size_dynamic_sections if no dynamic sections will be | |
1520 | created (we're only linking static objects). */ | |
1521 | ||
1522 | static void | |
1523 | elf_s390_adjust_gotplt (h) | |
1524 | struct elf_s390_link_hash_entry *h; | |
1525 | { | |
1526 | if (h->elf.root.type == bfd_link_hash_warning) | |
1527 | h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; | |
1528 | ||
1529 | if (h->gotplt_refcount <= 0) | |
1530 | return; | |
1531 | ||
1532 | /* We simply add the number of gotplt references to the number | |
1533 | * of got references for this symbol. */ | |
1534 | h->elf.got.refcount += h->gotplt_refcount; | |
1535 | h->gotplt_refcount = -1; | |
1536 | } | |
1537 | ||
a85d7ed0 NC |
1538 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1539 | regular object. The current definition is in some section of the | |
1540 | dynamic object, but we're not including those sections. We have to | |
1541 | change the definition to something the rest of the link can | |
1542 | understand. */ | |
1543 | ||
b34976b6 | 1544 | static bfd_boolean |
a85d7ed0 NC |
1545 | elf_s390_adjust_dynamic_symbol (info, h) |
1546 | struct bfd_link_info *info; | |
1547 | struct elf_link_hash_entry *h; | |
1548 | { | |
0451c93c | 1549 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1550 | asection *s; |
1551 | unsigned int power_of_two; | |
1552 | ||
a85d7ed0 NC |
1553 | /* If this is a function, put it in the procedure linkage table. We |
1554 | will fill in the contents of the procedure linkage table later | |
cedb70c5 | 1555 | (although we could actually do it here). */ |
a85d7ed0 NC |
1556 | if (h->type == STT_FUNC |
1557 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
1558 | { | |
0451c93c MS |
1559 | if (h->plt.refcount <= 0 |
1560 | || (! info->shared | |
1561 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
f9cd9119 MS |
1562 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 |
1563 | && h->root.type != bfd_link_hash_undefweak | |
1564 | && h->root.type != bfd_link_hash_undefined)) | |
a85d7ed0 NC |
1565 | { |
1566 | /* This case can occur if we saw a PLT32 reloc in an input | |
947216bf AM |
1567 | file, but the symbol was never referred to by a dynamic |
1568 | object, or if all references were garbage collected. In | |
0451c93c MS |
1569 | such a case, we don't actually need to build a procedure |
1570 | linkage table, and we can just do a PC32 reloc instead. */ | |
a85d7ed0 NC |
1571 | h->plt.offset = (bfd_vma) -1; |
1572 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1573 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
a85d7ed0 NC |
1574 | } |
1575 | ||
b34976b6 | 1576 | return TRUE; |
a85d7ed0 | 1577 | } |
bbd7ec4a | 1578 | else |
0451c93c MS |
1579 | /* It's possible that we incorrectly decided a .plt reloc was |
1580 | needed for an R_390_PC32 reloc to a non-function sym in | |
1581 | check_relocs. We can't decide accurately between function and | |
1582 | non-function syms in check-relocs; Objects loaded later in | |
1583 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1584 | h->plt.offset = (bfd_vma) -1; |
a85d7ed0 NC |
1585 | |
1586 | /* If this is a weak symbol, and there is a real definition, the | |
1587 | processor independent code will have arranged for us to see the | |
1588 | real definition first, and we can just use the same value. */ | |
1589 | if (h->weakdef != NULL) | |
1590 | { | |
1591 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1592 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1593 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1594 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
64285810 MS |
1595 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
1596 | h->elf_link_hash_flags | |
1597 | = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF) | |
1598 | | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF)); | |
b34976b6 | 1599 | return TRUE; |
a85d7ed0 NC |
1600 | } |
1601 | ||
1602 | /* This is a reference to a symbol defined by a dynamic object which | |
1603 | is not a function. */ | |
1604 | ||
1605 | /* If we are creating a shared library, we must presume that the | |
1606 | only references to the symbol are via the global offset table. | |
1607 | For such cases we need not do anything here; the relocations will | |
1608 | be handled correctly by relocate_section. */ | |
1609 | if (info->shared) | |
b34976b6 | 1610 | return TRUE; |
a85d7ed0 NC |
1611 | |
1612 | /* If there are no references to this symbol that do not use the | |
1613 | GOT, we don't need to generate a copy reloc. */ | |
1614 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
b34976b6 | 1615 | return TRUE; |
a85d7ed0 | 1616 | |
0451c93c MS |
1617 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1618 | if (info->nocopyreloc) | |
1619 | { | |
1620 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
b34976b6 | 1621 | return TRUE; |
0451c93c MS |
1622 | } |
1623 | ||
64285810 | 1624 | if (ELIMINATE_COPY_RELOCS) |
0451c93c | 1625 | { |
64285810 MS |
1626 | struct elf_s390_link_hash_entry * eh; |
1627 | struct elf_s390_dyn_relocs *p; | |
0451c93c | 1628 | |
64285810 MS |
1629 | eh = (struct elf_s390_link_hash_entry *) h; |
1630 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1631 | { | |
1632 | s = p->sec->output_section; | |
1633 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1634 | break; | |
1635 | } | |
1636 | ||
1637 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1638 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1639 | if (p == NULL) | |
1640 | { | |
1641 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
1642 | return TRUE; | |
1643 | } | |
0451c93c MS |
1644 | } |
1645 | ||
a85d7ed0 NC |
1646 | /* We must allocate the symbol in our .dynbss section, which will |
1647 | become part of the .bss section of the executable. There will be | |
1648 | an entry for this symbol in the .dynsym section. The dynamic | |
1649 | object will contain position independent code, so all references | |
1650 | from the dynamic object to this symbol will go through the global | |
1651 | offset table. The dynamic linker will use the .dynsym entry to | |
1652 | determine the address it must put in the global offset table, so | |
1653 | both the dynamic object and the regular object will refer to the | |
1654 | same memory location for the variable. */ | |
1655 | ||
0451c93c | 1656 | htab = elf_s390_hash_table (info); |
a85d7ed0 | 1657 | |
0451c93c MS |
1658 | /* We must generate a R_390_COPY reloc to tell the dynamic linker to |
1659 | copy the initial value out of the dynamic object and into the | |
1660 | runtime process image. */ | |
a85d7ed0 NC |
1661 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1662 | { | |
eea6121a | 1663 | htab->srelbss->size += sizeof (Elf64_External_Rela); |
a85d7ed0 NC |
1664 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
1665 | } | |
1666 | ||
1667 | /* We need to figure out the alignment required for this symbol. I | |
1668 | have no idea how ELF linkers handle this. */ | |
1669 | power_of_two = bfd_log2 (h->size); | |
1670 | if (power_of_two > 3) | |
1671 | power_of_two = 3; | |
1672 | ||
1673 | /* Apply the required alignment. */ | |
0451c93c | 1674 | s = htab->sdynbss; |
eea6121a | 1675 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
0451c93c | 1676 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
a85d7ed0 | 1677 | { |
0451c93c | 1678 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
b34976b6 | 1679 | return FALSE; |
a85d7ed0 NC |
1680 | } |
1681 | ||
1682 | /* Define the symbol as being at this point in the section. */ | |
1683 | h->root.u.def.section = s; | |
eea6121a | 1684 | h->root.u.def.value = s->size; |
a85d7ed0 NC |
1685 | |
1686 | /* Increment the section size to make room for the symbol. */ | |
eea6121a | 1687 | s->size += h->size; |
a85d7ed0 | 1688 | |
b34976b6 | 1689 | return TRUE; |
a85d7ed0 NC |
1690 | } |
1691 | ||
0451c93c MS |
1692 | /* Allocate space in .plt, .got and associated reloc sections for |
1693 | dynamic relocs. */ | |
1694 | ||
b34976b6 | 1695 | static bfd_boolean |
0451c93c MS |
1696 | allocate_dynrelocs (h, inf) |
1697 | struct elf_link_hash_entry *h; | |
1698 | PTR inf; | |
1699 | { | |
1700 | struct bfd_link_info *info; | |
1701 | struct elf_s390_link_hash_table *htab; | |
1702 | struct elf_s390_link_hash_entry *eh; | |
1703 | struct elf_s390_dyn_relocs *p; | |
1704 | ||
e92d460e | 1705 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1706 | return TRUE; |
0451c93c | 1707 | |
e92d460e | 1708 | if (h->root.type == bfd_link_hash_warning) |
5236c819 MS |
1709 | /* When warning symbols are created, they **replace** the "real" |
1710 | entry in the hash table, thus we never get to see the real | |
1711 | symbol in a hash traversal. So look at it now. */ | |
e92d460e AM |
1712 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
1713 | ||
0451c93c MS |
1714 | info = (struct bfd_link_info *) inf; |
1715 | htab = elf_s390_hash_table (info); | |
1716 | ||
1717 | if (htab->elf.dynamic_sections_created | |
82058a73 MS |
1718 | && h->plt.refcount > 0 |
1719 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1720 | || h->root.type != bfd_link_hash_undefweak)) | |
0451c93c MS |
1721 | { |
1722 | /* Make sure this symbol is output as a dynamic symbol. | |
1723 | Undefined weak syms won't yet be marked as dynamic. */ | |
1724 | if (h->dynindx == -1 | |
1725 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1726 | { | |
c152c796 | 1727 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1728 | return FALSE; |
0451c93c MS |
1729 | } |
1730 | ||
82058a73 | 1731 | if (info->shared |
4ec72bde | 1732 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
0451c93c MS |
1733 | { |
1734 | asection *s = htab->splt; | |
1735 | ||
1736 | /* If this is the first .plt entry, make room for the special | |
1737 | first entry. */ | |
eea6121a AM |
1738 | if (s->size == 0) |
1739 | s->size += PLT_FIRST_ENTRY_SIZE; | |
0451c93c | 1740 | |
eea6121a | 1741 | h->plt.offset = s->size; |
0451c93c MS |
1742 | |
1743 | /* If this symbol is not defined in a regular file, and we are | |
1744 | not generating a shared library, then set the symbol to this | |
1745 | location in the .plt. This is required to make function | |
1746 | pointers compare as equal between the normal executable and | |
1747 | the shared library. */ | |
1748 | if (! info->shared | |
1749 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1750 | { | |
1751 | h->root.u.def.section = s; | |
1752 | h->root.u.def.value = h->plt.offset; | |
1753 | } | |
ec338859 | 1754 | |
0451c93c | 1755 | /* Make room for this entry. */ |
eea6121a | 1756 | s->size += PLT_ENTRY_SIZE; |
ec338859 | 1757 | |
0451c93c MS |
1758 | /* We also need to make an entry in the .got.plt section, which |
1759 | will be placed in the .got section by the linker script. */ | |
eea6121a | 1760 | htab->sgotplt->size += GOT_ENTRY_SIZE; |
0451c93c MS |
1761 | |
1762 | /* We also need to make an entry in the .rela.plt section. */ | |
eea6121a | 1763 | htab->srelplt->size += sizeof (Elf64_External_Rela); |
0451c93c MS |
1764 | } |
1765 | else | |
1766 | { | |
1767 | h->plt.offset = (bfd_vma) -1; | |
1768 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1769 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c MS |
1770 | } |
1771 | } | |
1772 | else | |
1773 | { | |
1774 | h->plt.offset = (bfd_vma) -1; | |
1775 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1776 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c MS |
1777 | } |
1778 | ||
69fc87f1 MS |
1779 | /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to |
1780 | the binary, we can optimize a bit. IE64 and GOTIE64 get converted | |
1781 | to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT | |
1782 | we can save the dynamic TLS relocation. */ | |
1783 | if (h->got.refcount > 0 | |
1784 | && !info->shared | |
1785 | && h->dynindx == -1 | |
1786 | && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) | |
1787 | { | |
1788 | if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) | |
1789 | /* For the GOTIE access without a literal pool entry the offset has | |
1790 | to be stored somewhere. The immediate value in the instruction | |
1791 | is not bit enough so the value is stored in the got. */ | |
1792 | { | |
eea6121a AM |
1793 | h->got.offset = htab->sgot->size; |
1794 | htab->sgot->size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1795 | } |
1796 | else | |
1797 | h->got.offset = (bfd_vma) -1; | |
1798 | } | |
1799 | else if (h->got.refcount > 0) | |
0451c93c MS |
1800 | { |
1801 | asection *s; | |
b34976b6 | 1802 | bfd_boolean dyn; |
69fc87f1 | 1803 | int tls_type = elf_s390_hash_entry(h)->tls_type; |
0451c93c MS |
1804 | |
1805 | /* Make sure this symbol is output as a dynamic symbol. | |
1806 | Undefined weak syms won't yet be marked as dynamic. */ | |
1807 | if (h->dynindx == -1 | |
1808 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1809 | { | |
c152c796 | 1810 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1811 | return FALSE; |
0451c93c MS |
1812 | } |
1813 | ||
1814 | s = htab->sgot; | |
eea6121a AM |
1815 | h->got.offset = s->size; |
1816 | s->size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1817 | /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ |
1818 | if (tls_type == GOT_TLS_GD) | |
eea6121a | 1819 | s->size += GOT_ENTRY_SIZE; |
0451c93c | 1820 | dyn = htab->elf.dynamic_sections_created; |
69fc87f1 MS |
1821 | /* R_390_TLS_IE64 needs one dynamic relocation, |
1822 | R_390_TLS_GD64 needs one if local symbol and two if global. */ | |
1823 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1824 | || tls_type >= GOT_TLS_IE) | |
eea6121a | 1825 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
69fc87f1 | 1826 | else if (tls_type == GOT_TLS_GD) |
eea6121a | 1827 | htab->srelgot->size += 2 * sizeof (Elf64_External_Rela); |
82058a73 MS |
1828 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
1829 | || h->root.type != bfd_link_hash_undefweak) | |
1830 | && (info->shared | |
1831 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
eea6121a | 1832 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
0451c93c MS |
1833 | } |
1834 | else | |
1835 | h->got.offset = (bfd_vma) -1; | |
1836 | ||
1837 | eh = (struct elf_s390_link_hash_entry *) h; | |
1838 | if (eh->dyn_relocs == NULL) | |
b34976b6 | 1839 | return TRUE; |
0451c93c MS |
1840 | |
1841 | /* In the shared -Bsymbolic case, discard space allocated for | |
1842 | dynamic pc-relative relocs against symbols which turn out to be | |
1843 | defined in regular objects. For the normal shared case, discard | |
1844 | space for pc-relative relocs that have become local due to symbol | |
1845 | visibility changes. */ | |
1846 | ||
1847 | if (info->shared) | |
1848 | { | |
1c3ff0f2 | 1849 | if (SYMBOL_REFERENCES_LOCAL (info, h)) |
0451c93c MS |
1850 | { |
1851 | struct elf_s390_dyn_relocs **pp; | |
1852 | ||
1853 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1854 | { | |
1855 | p->count -= p->pc_count; | |
1856 | p->pc_count = 0; | |
1857 | if (p->count == 0) | |
1858 | *pp = p->next; | |
1859 | else | |
1860 | pp = &p->next; | |
1861 | } | |
1862 | } | |
82058a73 MS |
1863 | |
1864 | /* Also discard relocs on undefined weak syms with non-default | |
1865 | visibility. */ | |
1866 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1867 | && h->root.type == bfd_link_hash_undefweak) | |
1868 | eh->dyn_relocs = NULL; | |
0451c93c | 1869 | } |
64285810 | 1870 | else if (ELIMINATE_COPY_RELOCS) |
0451c93c MS |
1871 | { |
1872 | /* For the non-shared case, discard space for relocs against | |
1873 | symbols which turn out to need copy relocs or are not | |
1874 | dynamic. */ | |
1875 | ||
1876 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
1877 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1878 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1879 | || (htab->elf.dynamic_sections_created | |
1880 | && (h->root.type == bfd_link_hash_undefweak | |
1881 | || h->root.type == bfd_link_hash_undefined)))) | |
1882 | { | |
1883 | /* Make sure this symbol is output as a dynamic symbol. | |
1884 | Undefined weak syms won't yet be marked as dynamic. */ | |
1885 | if (h->dynindx == -1 | |
1886 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1887 | { | |
c152c796 | 1888 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1889 | return FALSE; |
0451c93c MS |
1890 | } |
1891 | ||
1892 | /* If that succeeded, we know we'll be keeping all the | |
1893 | relocs. */ | |
1894 | if (h->dynindx != -1) | |
1895 | goto keep; | |
1896 | } | |
1897 | ||
1898 | eh->dyn_relocs = NULL; | |
1899 | ||
ec338859 | 1900 | keep: ; |
0451c93c MS |
1901 | } |
1902 | ||
1903 | /* Finally, allocate space. */ | |
1904 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1905 | { | |
1906 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1907 | sreloc->size += p->count * sizeof (Elf64_External_Rela); |
0451c93c MS |
1908 | } |
1909 | ||
b34976b6 | 1910 | return TRUE; |
0451c93c MS |
1911 | } |
1912 | ||
1913 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1914 | ||
b34976b6 | 1915 | static bfd_boolean |
0451c93c MS |
1916 | readonly_dynrelocs (h, inf) |
1917 | struct elf_link_hash_entry *h; | |
1918 | PTR inf; | |
1919 | { | |
1920 | struct elf_s390_link_hash_entry *eh; | |
1921 | struct elf_s390_dyn_relocs *p; | |
1922 | ||
e92d460e AM |
1923 | if (h->root.type == bfd_link_hash_warning) |
1924 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1925 | ||
0451c93c MS |
1926 | eh = (struct elf_s390_link_hash_entry *) h; |
1927 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1928 | { | |
1929 | asection *s = p->sec->output_section; | |
1930 | ||
1931 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1932 | { | |
1933 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1934 | ||
1935 | info->flags |= DF_TEXTREL; | |
1936 | ||
1937 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1938 | return FALSE; |
0451c93c MS |
1939 | } |
1940 | } | |
b34976b6 | 1941 | return TRUE; |
0451c93c MS |
1942 | } |
1943 | ||
a85d7ed0 NC |
1944 | /* Set the sizes of the dynamic sections. */ |
1945 | ||
b34976b6 | 1946 | static bfd_boolean |
a85d7ed0 | 1947 | elf_s390_size_dynamic_sections (output_bfd, info) |
29c2fb7c | 1948 | bfd *output_bfd ATTRIBUTE_UNUSED; |
a85d7ed0 NC |
1949 | struct bfd_link_info *info; |
1950 | { | |
0451c93c | 1951 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1952 | bfd *dynobj; |
1953 | asection *s; | |
b34976b6 | 1954 | bfd_boolean relocs; |
0451c93c | 1955 | bfd *ibfd; |
a85d7ed0 | 1956 | |
0451c93c MS |
1957 | htab = elf_s390_hash_table (info); |
1958 | dynobj = htab->elf.dynobj; | |
1959 | if (dynobj == NULL) | |
1960 | abort (); | |
a85d7ed0 | 1961 | |
0451c93c | 1962 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
1963 | { |
1964 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 1965 | if (info->executable) |
a85d7ed0 NC |
1966 | { |
1967 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
0451c93c MS |
1968 | if (s == NULL) |
1969 | abort (); | |
eea6121a | 1970 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
a85d7ed0 NC |
1971 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1972 | } | |
1973 | } | |
a85d7ed0 | 1974 | |
0451c93c MS |
1975 | /* Set up .got offsets for local syms, and space for local dynamic |
1976 | relocs. */ | |
1977 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
a85d7ed0 | 1978 | { |
0451c93c MS |
1979 | bfd_signed_vma *local_got; |
1980 | bfd_signed_vma *end_local_got; | |
69fc87f1 | 1981 | char *local_tls_type; |
0451c93c MS |
1982 | bfd_size_type locsymcount; |
1983 | Elf_Internal_Shdr *symtab_hdr; | |
1984 | asection *srela; | |
a85d7ed0 | 1985 | |
0451c93c | 1986 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
a85d7ed0 NC |
1987 | continue; |
1988 | ||
0451c93c | 1989 | for (s = ibfd->sections; s != NULL; s = s->next) |
a85d7ed0 | 1990 | { |
ec338859 | 1991 | struct elf_s390_dyn_relocs *p; |
0451c93c | 1992 | |
ec338859 AM |
1993 | for (p = *((struct elf_s390_dyn_relocs **) |
1994 | &elf_section_data (s)->local_dynrel); | |
1995 | p != NULL; | |
1996 | p = p->next) | |
a85d7ed0 | 1997 | { |
ec338859 AM |
1998 | if (!bfd_is_abs_section (p->sec) |
1999 | && bfd_is_abs_section (p->sec->output_section)) | |
2000 | { | |
2001 | /* Input section has been discarded, either because | |
2002 | it is a copy of a linkonce section or due to | |
2003 | linker script /DISCARD/, so we'll be discarding | |
2004 | the relocs too. */ | |
2005 | } | |
248866a8 | 2006 | else if (p->count != 0) |
ec338859 AM |
2007 | { |
2008 | srela = elf_section_data (p->sec)->sreloc; | |
eea6121a | 2009 | srela->size += p->count * sizeof (Elf64_External_Rela); |
248866a8 AM |
2010 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
2011 | info->flags |= DF_TEXTREL; | |
ec338859 | 2012 | } |
a85d7ed0 NC |
2013 | } |
2014 | } | |
0451c93c MS |
2015 | |
2016 | local_got = elf_local_got_refcounts (ibfd); | |
2017 | if (!local_got) | |
2018 | continue; | |
2019 | ||
2020 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2021 | locsymcount = symtab_hdr->sh_info; | |
2022 | end_local_got = local_got + locsymcount; | |
69fc87f1 | 2023 | local_tls_type = elf_s390_local_got_tls_type (ibfd); |
0451c93c MS |
2024 | s = htab->sgot; |
2025 | srela = htab->srelgot; | |
69fc87f1 | 2026 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
a85d7ed0 | 2027 | { |
0451c93c | 2028 | if (*local_got > 0) |
a85d7ed0 | 2029 | { |
eea6121a AM |
2030 | *local_got = s->size; |
2031 | s->size += GOT_ENTRY_SIZE; | |
69fc87f1 | 2032 | if (*local_tls_type == GOT_TLS_GD) |
eea6121a | 2033 | s->size += GOT_ENTRY_SIZE; |
0451c93c | 2034 | if (info->shared) |
eea6121a | 2035 | srela->size += sizeof (Elf64_External_Rela); |
a85d7ed0 NC |
2036 | } |
2037 | else | |
0451c93c | 2038 | *local_got = (bfd_vma) -1; |
a85d7ed0 | 2039 | } |
0451c93c MS |
2040 | } |
2041 | ||
69fc87f1 MS |
2042 | if (htab->tls_ldm_got.refcount > 0) |
2043 | { | |
2044 | /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 | |
2045 | relocs. */ | |
eea6121a AM |
2046 | htab->tls_ldm_got.offset = htab->sgot->size; |
2047 | htab->sgot->size += 2 * GOT_ENTRY_SIZE; | |
2048 | htab->srelgot->size += sizeof (Elf64_External_Rela); | |
69fc87f1 MS |
2049 | } |
2050 | else | |
2051 | htab->tls_ldm_got.offset = -1; | |
2052 | ||
0451c93c MS |
2053 | /* Allocate global sym .plt and .got entries, and space for global |
2054 | sym dynamic relocs. */ | |
2055 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
2056 | ||
2057 | /* We now have determined the sizes of the various dynamic sections. | |
2058 | Allocate memory for them. */ | |
b34976b6 | 2059 | relocs = FALSE; |
0451c93c MS |
2060 | for (s = dynobj->sections; s != NULL; s = s->next) |
2061 | { | |
2062 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2063 | continue; | |
2064 | ||
2065 | if (s == htab->splt | |
2066 | || s == htab->sgot | |
2067 | || s == htab->sgotplt) | |
2068 | { | |
2069 | /* Strip this section if we don't need it; see the | |
2070 | comment below. */ | |
2071 | } | |
2072 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) | |
2073 | { | |
eea6121a | 2074 | if (s->size != 0 && s != htab->srelplt) |
b34976b6 | 2075 | relocs = TRUE; |
ec338859 | 2076 | |
0451c93c MS |
2077 | /* We use the reloc_count field as a counter if we need |
2078 | to copy relocs into the output file. */ | |
2079 | s->reloc_count = 0; | |
2080 | } | |
2081 | else | |
a85d7ed0 NC |
2082 | { |
2083 | /* It's not one of our sections, so don't allocate space. */ | |
2084 | continue; | |
2085 | } | |
2086 | ||
eea6121a | 2087 | if (s->size == 0) |
a85d7ed0 | 2088 | { |
0451c93c MS |
2089 | /* If we don't need this section, strip it from the |
2090 | output file. This is to handle .rela.bss and | |
2091 | .rela.plt. We must create it in | |
2092 | create_dynamic_sections, because it must be created | |
2093 | before the linker maps input sections to output | |
2094 | sections. The linker does that before | |
2095 | adjust_dynamic_symbol is called, and it is that | |
2096 | function which decides whether anything needs to go | |
2097 | into these sections. */ | |
2098 | ||
a85d7ed0 NC |
2099 | _bfd_strip_section_from_output (info, s); |
2100 | continue; | |
2101 | } | |
2102 | ||
0451c93c MS |
2103 | /* Allocate memory for the section contents. We use bfd_zalloc |
2104 | here in case unused entries are not reclaimed before the | |
2105 | section's contents are written out. This should not happen, | |
2106 | but this way if it does, we get a R_390_NONE reloc instead | |
2107 | of garbage. */ | |
eea6121a | 2108 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
0451c93c | 2109 | if (s->contents == NULL) |
b34976b6 | 2110 | return FALSE; |
a85d7ed0 NC |
2111 | } |
2112 | ||
0451c93c | 2113 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
2114 | { |
2115 | /* Add some entries to the .dynamic section. We fill in the | |
2116 | values later, in elf_s390_finish_dynamic_sections, but we | |
2117 | must add the entries now so that we get the correct size for | |
2118 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2119 | dynamic linker and used by the debugger. */ | |
dc810e39 | 2120 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2121 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2122 | |
36af4a4e | 2123 | if (info->executable) |
a85d7ed0 | 2124 | { |
dc810e39 | 2125 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2126 | return FALSE; |
a85d7ed0 NC |
2127 | } |
2128 | ||
eea6121a | 2129 | if (htab->splt->size != 0) |
a85d7ed0 | 2130 | { |
dc810e39 AM |
2131 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2132 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2133 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2134 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2135 | return FALSE; |
a85d7ed0 NC |
2136 | } |
2137 | ||
2138 | if (relocs) | |
947216bf AM |
2139 | { |
2140 | if (!add_dynamic_entry (DT_RELA, 0) | |
2141 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2142 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 2143 | return FALSE; |
ec338859 | 2144 | |
0451c93c MS |
2145 | /* If any dynamic relocs apply to a read-only section, |
2146 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
2147 | if ((info->flags & DF_TEXTREL) == 0) |
2148 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
2149 | (PTR) info); | |
ec338859 | 2150 | |
0451c93c MS |
2151 | if ((info->flags & DF_TEXTREL) != 0) |
2152 | { | |
2153 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2154 | return FALSE; |
0451c93c | 2155 | } |
a85d7ed0 NC |
2156 | } |
2157 | } | |
dc810e39 | 2158 | #undef add_dynamic_entry |
a85d7ed0 | 2159 | |
b34976b6 | 2160 | return TRUE; |
a85d7ed0 NC |
2161 | } |
2162 | ||
69fc87f1 MS |
2163 | /* Return the base VMA address which should be subtracted from real addresses |
2164 | when resolving @dtpoff relocation. | |
2165 | This is PT_TLS segment p_vaddr. */ | |
2166 | ||
2167 | static bfd_vma | |
2168 | dtpoff_base (info) | |
2169 | struct bfd_link_info *info; | |
2170 | { | |
e1918d23 AM |
2171 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2172 | if (elf_hash_table (info)->tls_sec == NULL) | |
69fc87f1 | 2173 | return 0; |
e1918d23 | 2174 | return elf_hash_table (info)->tls_sec->vma; |
69fc87f1 MS |
2175 | } |
2176 | ||
2177 | /* Return the relocation value for @tpoff relocation | |
2178 | if STT_TLS virtual address is ADDRESS. */ | |
2179 | ||
2180 | static bfd_vma | |
2181 | tpoff (info, address) | |
2182 | struct bfd_link_info *info; | |
2183 | bfd_vma address; | |
2184 | { | |
e1918d23 | 2185 | struct elf_link_hash_table *htab = elf_hash_table (info); |
69fc87f1 | 2186 | |
e1918d23 AM |
2187 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2188 | if (htab->tls_sec == NULL) | |
69fc87f1 | 2189 | return 0; |
e1918d23 | 2190 | return htab->tls_size + htab->tls_sec->vma - address; |
69fc87f1 MS |
2191 | } |
2192 | ||
2193 | /* Complain if TLS instruction relocation is against an invalid | |
2194 | instruction. */ | |
2195 | ||
2196 | static void | |
2197 | invalid_tls_insn (input_bfd, input_section, rel) | |
2198 | bfd *input_bfd; | |
2199 | asection *input_section; | |
2200 | Elf_Internal_Rela *rel; | |
2201 | { | |
2202 | reloc_howto_type *howto; | |
2203 | ||
2204 | howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); | |
2205 | (*_bfd_error_handler) | |
2206 | (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"), | |
2207 | bfd_archive_filename (input_bfd), | |
2208 | bfd_get_section_name (input_bfd, input_section), | |
2209 | (long) rel->r_offset, | |
2210 | howto->name); | |
2211 | } | |
2212 | ||
a85d7ed0 NC |
2213 | /* Relocate a 390 ELF section. */ |
2214 | ||
b34976b6 | 2215 | static bfd_boolean |
a85d7ed0 NC |
2216 | elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, |
2217 | contents, relocs, local_syms, local_sections) | |
2218 | bfd *output_bfd; | |
2219 | struct bfd_link_info *info; | |
2220 | bfd *input_bfd; | |
2221 | asection *input_section; | |
2222 | bfd_byte *contents; | |
2223 | Elf_Internal_Rela *relocs; | |
2224 | Elf_Internal_Sym *local_syms; | |
2225 | asection **local_sections; | |
2226 | { | |
0451c93c | 2227 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
2228 | Elf_Internal_Shdr *symtab_hdr; |
2229 | struct elf_link_hash_entry **sym_hashes; | |
2230 | bfd_vma *local_got_offsets; | |
a85d7ed0 NC |
2231 | Elf_Internal_Rela *rel; |
2232 | Elf_Internal_Rela *relend; | |
2233 | ||
1049f94e | 2234 | if (info->relocatable) |
b34976b6 | 2235 | return TRUE; |
b491616a | 2236 | |
0451c93c | 2237 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
2238 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2239 | sym_hashes = elf_sym_hashes (input_bfd); | |
2240 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
2241 | ||
a85d7ed0 NC |
2242 | rel = relocs; |
2243 | relend = relocs + input_section->reloc_count; | |
2244 | for (; rel < relend; rel++) | |
2245 | { | |
5236c819 | 2246 | unsigned int r_type; |
a85d7ed0 NC |
2247 | reloc_howto_type *howto; |
2248 | unsigned long r_symndx; | |
2249 | struct elf_link_hash_entry *h; | |
2250 | Elf_Internal_Sym *sym; | |
2251 | asection *sec; | |
0451c93c | 2252 | bfd_vma off; |
a85d7ed0 | 2253 | bfd_vma relocation; |
b34976b6 | 2254 | bfd_boolean unresolved_reloc; |
a85d7ed0 | 2255 | bfd_reloc_status_type r; |
69fc87f1 | 2256 | int tls_type; |
a85d7ed0 NC |
2257 | |
2258 | r_type = ELF64_R_TYPE (rel->r_info); | |
0451c93c | 2259 | if (r_type == (int) R_390_GNU_VTINHERIT |
947216bf AM |
2260 | || r_type == (int) R_390_GNU_VTENTRY) |
2261 | continue; | |
5236c819 | 2262 | if (r_type >= (int) R_390_max) |
a85d7ed0 NC |
2263 | { |
2264 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2265 | return FALSE; |
a85d7ed0 | 2266 | } |
a85d7ed0 | 2267 | |
b491616a | 2268 | howto = elf_howto_table + r_type; |
a85d7ed0 | 2269 | r_symndx = ELF64_R_SYM (rel->r_info); |
5236c819 MS |
2270 | |
2271 | /* This is a final link. */ | |
a85d7ed0 NC |
2272 | h = NULL; |
2273 | sym = NULL; | |
2274 | sec = NULL; | |
b34976b6 | 2275 | unresolved_reloc = FALSE; |
a85d7ed0 NC |
2276 | if (r_symndx < symtab_hdr->sh_info) |
2277 | { | |
2278 | sym = local_syms + r_symndx; | |
2279 | sec = local_sections[r_symndx]; | |
8517fae7 | 2280 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
a85d7ed0 NC |
2281 | } |
2282 | else | |
2283 | { | |
560e09e9 | 2284 | bfd_boolean warned ATTRIBUTE_UNUSED; |
0451c93c | 2285 | |
b2a8e766 AM |
2286 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2287 | r_symndx, symtab_hdr, sym_hashes, | |
2288 | h, sec, relocation, | |
2289 | unresolved_reloc, warned); | |
a85d7ed0 NC |
2290 | } |
2291 | ||
2292 | switch (r_type) | |
2293 | { | |
5236c819 MS |
2294 | case R_390_GOTPLT12: |
2295 | case R_390_GOTPLT16: | |
bd1ea41b | 2296 | case R_390_GOTPLT20: |
5236c819 MS |
2297 | case R_390_GOTPLT32: |
2298 | case R_390_GOTPLT64: | |
2299 | case R_390_GOTPLTENT: | |
2300 | /* There are three cases for a GOTPLT relocation. 1) The | |
2301 | relocation is against the jump slot entry of a plt that | |
2302 | will get emitted to the output file. 2) The relocation | |
2303 | is against the jump slot of a plt entry that has been | |
2304 | removed. elf_s390_adjust_gotplt has created a GOT entry | |
2305 | as replacement. 3) The relocation is against a local symbol. | |
2306 | Cases 2) and 3) are the same as the GOT relocation code | |
2307 | so we just have to test for case 1 and fall through for | |
2308 | the other two. */ | |
2309 | if (h != NULL && h->plt.offset != (bfd_vma) -1) | |
2310 | { | |
2311 | bfd_vma plt_index; | |
2312 | ||
2313 | /* Calc. index no. | |
2314 | Current offset - size first entry / entry size. */ | |
2315 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / | |
2316 | PLT_ENTRY_SIZE; | |
26e41594 | 2317 | |
5236c819 MS |
2318 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, |
2319 | addr & GOT addr. */ | |
2320 | relocation = (plt_index + 3) * GOT_ENTRY_SIZE; | |
2321 | unresolved_reloc = FALSE; | |
2322 | ||
2323 | if (r_type == R_390_GOTPLTENT) | |
26e41594 | 2324 | relocation += htab->sgot->output_section->vma; |
5236c819 MS |
2325 | break; |
2326 | } | |
2327 | /* Fall through. */ | |
2328 | ||
947216bf AM |
2329 | case R_390_GOT12: |
2330 | case R_390_GOT16: | |
bd1ea41b | 2331 | case R_390_GOT20: |
947216bf AM |
2332 | case R_390_GOT32: |
2333 | case R_390_GOT64: | |
2334 | case R_390_GOTENT: | |
2335 | /* Relocation is to the entry for this symbol in the global | |
2336 | offset table. */ | |
0451c93c MS |
2337 | if (htab->sgot == NULL) |
2338 | abort (); | |
a85d7ed0 | 2339 | |
947216bf AM |
2340 | if (h != NULL) |
2341 | { | |
b34976b6 | 2342 | bfd_boolean dyn; |
a85d7ed0 | 2343 | |
947216bf | 2344 | off = h->got.offset; |
0451c93c | 2345 | dyn = htab->elf.dynamic_sections_created; |
4ec72bde | 2346 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
947216bf AM |
2347 | || (info->shared |
2348 | && (info->symbolic | |
0451c93c MS |
2349 | || h->dynindx == -1 |
2350 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
82058a73 MS |
2351 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
2352 | || (ELF_ST_VISIBILITY (h->other) | |
2353 | && h->root.type == bfd_link_hash_undefweak)) | |
947216bf AM |
2354 | { |
2355 | /* This is actually a static link, or it is a | |
2356 | -Bsymbolic link and the symbol is defined | |
2357 | locally, or the symbol was forced to be local | |
2358 | because of a version file. We must initialize | |
2359 | this entry in the global offset table. Since the | |
2360 | offset must always be a multiple of 2, we use the | |
2361 | least significant bit to record whether we have | |
2362 | initialized it already. | |
2363 | ||
2364 | When doing a dynamic link, we create a .rel.got | |
2365 | relocation entry to initialize the value. This | |
2366 | is done in the finish_dynamic_symbol routine. */ | |
2367 | if ((off & 1) != 0) | |
2368 | off &= ~1; | |
2369 | else | |
2370 | { | |
a85d7ed0 | 2371 | bfd_put_64 (output_bfd, relocation, |
0451c93c | 2372 | htab->sgot->contents + off); |
947216bf AM |
2373 | h->got.offset |= 1; |
2374 | } | |
2375 | } | |
0451c93c | 2376 | else |
b34976b6 | 2377 | unresolved_reloc = FALSE; |
947216bf AM |
2378 | } |
2379 | else | |
2380 | { | |
0451c93c MS |
2381 | if (local_got_offsets == NULL) |
2382 | abort (); | |
a85d7ed0 | 2383 | |
947216bf | 2384 | off = local_got_offsets[r_symndx]; |
a85d7ed0 | 2385 | |
947216bf AM |
2386 | /* The offset must always be a multiple of 8. We use |
2387 | the least significant bit to record whether we have | |
2388 | already generated the necessary reloc. */ | |
2389 | if ((off & 1) != 0) | |
2390 | off &= ~1; | |
2391 | else | |
2392 | { | |
2393 | bfd_put_64 (output_bfd, relocation, | |
0451c93c | 2394 | htab->sgot->contents + off); |
a85d7ed0 | 2395 | |
947216bf AM |
2396 | if (info->shared) |
2397 | { | |
2398 | asection *s; | |
2399 | Elf_Internal_Rela outrel; | |
2400 | bfd_byte *loc; | |
a85d7ed0 | 2401 | |
947216bf AM |
2402 | s = htab->srelgot; |
2403 | if (s == NULL) | |
0451c93c | 2404 | abort (); |
a85d7ed0 | 2405 | |
947216bf AM |
2406 | outrel.r_offset = (htab->sgot->output_section->vma |
2407 | + htab->sgot->output_offset | |
2408 | + off); | |
2409 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
a85d7ed0 | 2410 | outrel.r_addend = relocation; |
947216bf AM |
2411 | loc = s->contents; |
2412 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
2413 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2414 | } | |
a85d7ed0 | 2415 | |
947216bf AM |
2416 | local_got_offsets[r_symndx] |= 1; |
2417 | } | |
2418 | } | |
a85d7ed0 | 2419 | |
0451c93c MS |
2420 | if (off >= (bfd_vma) -2) |
2421 | abort (); | |
2422 | ||
2423 | relocation = htab->sgot->output_offset + off; | |
2424 | ||
ae9a127f NC |
2425 | /* For @GOTENT the relocation is against the offset between |
2426 | the instruction and the symbols entry in the GOT and not | |
2427 | between the start of the GOT and the symbols entry. We | |
2428 | add the vma of the GOT to get the correct value. */ | |
5236c819 MS |
2429 | if ( r_type == R_390_GOTENT |
2430 | || r_type == R_390_GOTPLTENT) | |
0451c93c | 2431 | relocation += htab->sgot->output_section->vma; |
a85d7ed0 | 2432 | |
947216bf | 2433 | break; |
99c79b2e | 2434 | |
5236c819 MS |
2435 | case R_390_GOTOFF16: |
2436 | case R_390_GOTOFF32: | |
2437 | case R_390_GOTOFF64: | |
947216bf AM |
2438 | /* Relocation is relative to the start of the global offset |
2439 | table. */ | |
a85d7ed0 | 2440 | |
947216bf AM |
2441 | /* Note that sgot->output_offset is not involved in this |
2442 | calculation. We always want the start of .got. If we | |
2443 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
2444 | permitted by the ABI, we might have to change this | |
2445 | calculation. */ | |
2446 | relocation -= htab->sgot->output_section->vma; | |
947216bf | 2447 | break; |
a85d7ed0 | 2448 | |
947216bf | 2449 | case R_390_GOTPC: |
a85d7ed0 | 2450 | case R_390_GOTPCDBL: |
947216bf AM |
2451 | /* Use global offset table as symbol value. */ |
2452 | relocation = htab->sgot->output_section->vma; | |
b34976b6 | 2453 | unresolved_reloc = FALSE; |
947216bf | 2454 | break; |
a85d7ed0 | 2455 | |
947216bf AM |
2456 | case R_390_PLT16DBL: |
2457 | case R_390_PLT32: | |
2458 | case R_390_PLT32DBL: | |
2459 | case R_390_PLT64: | |
2460 | /* Relocation is to the entry for this symbol in the | |
2461 | procedure linkage table. */ | |
a85d7ed0 | 2462 | |
947216bf AM |
2463 | /* Resolve a PLT32 reloc against a local symbol directly, |
2464 | without using the procedure linkage table. */ | |
2465 | if (h == NULL) | |
2466 | break; | |
a85d7ed0 | 2467 | |
947216bf | 2468 | if (h->plt.offset == (bfd_vma) -1 |
0451c93c | 2469 | || htab->splt == NULL) |
947216bf AM |
2470 | { |
2471 | /* We didn't make a PLT entry for this symbol. This | |
2472 | happens when statically linking PIC code, or when | |
2473 | using -Bsymbolic. */ | |
2474 | break; | |
2475 | } | |
2476 | ||
2477 | relocation = (htab->splt->output_section->vma | |
2478 | + htab->splt->output_offset | |
2479 | + h->plt.offset); | |
b34976b6 | 2480 | unresolved_reloc = FALSE; |
26e41594 | 2481 | break; |
5236c819 MS |
2482 | |
2483 | case R_390_PLTOFF16: | |
2484 | case R_390_PLTOFF32: | |
2485 | case R_390_PLTOFF64: | |
26e41594 AM |
2486 | /* Relocation is to the entry for this symbol in the |
2487 | procedure linkage table relative to the start of the GOT. */ | |
5236c819 MS |
2488 | |
2489 | /* For local symbols or if we didn't make a PLT entry for | |
2490 | this symbol resolve the symbol directly. */ | |
26e41594 | 2491 | if ( h == NULL |
5236c819 MS |
2492 | || h->plt.offset == (bfd_vma) -1 |
2493 | || htab->splt == NULL) | |
2494 | { | |
2495 | relocation -= htab->sgot->output_section->vma; | |
2496 | break; | |
2497 | } | |
2498 | ||
26e41594 AM |
2499 | relocation = (htab->splt->output_section->vma |
2500 | + htab->splt->output_offset | |
2501 | + h->plt.offset | |
5236c819 MS |
2502 | - htab->sgot->output_section->vma); |
2503 | unresolved_reloc = FALSE; | |
947216bf AM |
2504 | break; |
2505 | ||
2506 | case R_390_8: | |
2507 | case R_390_16: | |
2508 | case R_390_32: | |
2509 | case R_390_64: | |
2510 | case R_390_PC16: | |
2511 | case R_390_PC16DBL: | |
2512 | case R_390_PC32: | |
a85d7ed0 | 2513 | case R_390_PC32DBL: |
947216bf | 2514 | case R_390_PC64: |
ec338859 AM |
2515 | /* r_symndx will be zero only for relocs against symbols |
2516 | from removed linkonce sections, or sections discarded by | |
2517 | a linker script. */ | |
947216bf AM |
2518 | if (r_symndx == 0 |
2519 | || (input_section->flags & SEC_ALLOC) == 0) | |
ec338859 AM |
2520 | break; |
2521 | ||
947216bf | 2522 | if ((info->shared |
82058a73 MS |
2523 | && (h == NULL |
2524 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2525 | || h->root.type != bfd_link_hash_undefweak) | |
0451c93c MS |
2526 | && ((r_type != R_390_PC16 |
2527 | && r_type != R_390_PC16DBL | |
2528 | && r_type != R_390_PC32 | |
2529 | && r_type != R_390_PC32DBL | |
2530 | && r_type != R_390_PC64) | |
2531 | || (h != NULL | |
1c3ff0f2 | 2532 | && !SYMBOL_REFERENCES_LOCAL (info, h)))) |
64285810 MS |
2533 | || (ELIMINATE_COPY_RELOCS |
2534 | && !info->shared | |
0451c93c MS |
2535 | && h != NULL |
2536 | && h->dynindx != -1 | |
2537 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
2538 | && (((h->elf_link_hash_flags | |
2539 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2540 | && (h->elf_link_hash_flags | |
2541 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2542 | || h->root.type == bfd_link_hash_undefweak | |
2543 | || h->root.type == bfd_link_hash_undefined))) | |
947216bf AM |
2544 | { |
2545 | Elf_Internal_Rela outrel; | |
b34976b6 | 2546 | bfd_boolean skip, relocate; |
0451c93c | 2547 | asection *sreloc; |
947216bf | 2548 | bfd_byte *loc; |
a85d7ed0 | 2549 | |
947216bf AM |
2550 | /* When generating a shared object, these relocations |
2551 | are copied into the output file to be resolved at run | |
2552 | time. */ | |
b34976b6 AM |
2553 | skip = FALSE; |
2554 | relocate = FALSE; | |
a85d7ed0 | 2555 | |
c629eae0 JJ |
2556 | outrel.r_offset = |
2557 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2558 | rel->r_offset); | |
2559 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2560 | skip = TRUE; |
0bb2d96a | 2561 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2562 | skip = TRUE, relocate = TRUE; |
a85d7ed0 | 2563 | |
947216bf AM |
2564 | outrel.r_offset += (input_section->output_section->vma |
2565 | + input_section->output_offset); | |
a85d7ed0 | 2566 | |
947216bf | 2567 | if (skip) |
0bb2d96a | 2568 | memset (&outrel, 0, sizeof outrel); |
947216bf | 2569 | else if (h != NULL |
0451c93c MS |
2570 | && h->dynindx != -1 |
2571 | && (r_type == R_390_PC16 | |
2572 | || r_type == R_390_PC16DBL | |
2573 | || r_type == R_390_PC32 | |
2574 | || r_type == R_390_PC32DBL | |
2575 | || r_type == R_390_PC64 | |
2576 | || !info->shared | |
2577 | || !info->symbolic | |
2578 | || (h->elf_link_hash_flags | |
2579 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
947216bf AM |
2580 | { |
2581 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); | |
27018c3f | 2582 | outrel.r_addend = rel->r_addend; |
947216bf AM |
2583 | } |
2584 | else | |
2585 | { | |
0451c93c | 2586 | /* This symbol is local, or marked to become local. */ |
90ced0dd | 2587 | outrel.r_addend = relocation + rel->r_addend; |
b5727d75 MS |
2588 | if (r_type == R_390_64) |
2589 | { | |
2590 | relocate = TRUE; | |
2591 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
b5727d75 MS |
2592 | } |
2593 | else | |
2594 | { | |
2595 | long sindx; | |
2596 | ||
90ced0dd | 2597 | if (bfd_is_abs_section (sec)) |
b5727d75 MS |
2598 | sindx = 0; |
2599 | else if (sec == NULL || sec->owner == NULL) | |
2600 | { | |
2601 | bfd_set_error(bfd_error_bad_value); | |
2602 | return FALSE; | |
2603 | } | |
2604 | else | |
2605 | { | |
2606 | asection *osec; | |
2607 | ||
2608 | osec = sec->output_section; | |
2609 | sindx = elf_section_data (osec)->dynindx; | |
2610 | BFD_ASSERT (sindx > 0); | |
90ced0dd MS |
2611 | |
2612 | /* We are turning this relocation into one | |
2613 | against a section symbol, so subtract out | |
2614 | the output section's address but not the | |
2615 | offset of the input section in the output | |
2616 | section. */ | |
2617 | ||
2618 | outrel.r_addend -= osec->vma; | |
b5727d75 MS |
2619 | } |
2620 | outrel.r_info = ELF64_R_INFO (sindx, r_type); | |
b5727d75 | 2621 | } |
0451c93c | 2622 | } |
a85d7ed0 | 2623 | |
0451c93c MS |
2624 | sreloc = elf_section_data (input_section)->sreloc; |
2625 | if (sreloc == NULL) | |
2626 | abort (); | |
2627 | ||
947216bf AM |
2628 | loc = sreloc->contents; |
2629 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2630 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
a85d7ed0 | 2631 | |
947216bf AM |
2632 | /* If this reloc is against an external symbol, we do |
2633 | not want to fiddle with the addend. Otherwise, we | |
2634 | need to include the symbol value so that it becomes | |
2635 | an addend for the dynamic reloc. */ | |
2636 | if (! relocate) | |
2637 | continue; | |
2638 | } | |
a85d7ed0 | 2639 | |
947216bf | 2640 | break; |
a85d7ed0 | 2641 | |
69fc87f1 MS |
2642 | /* Relocations for tls literal pool entries. */ |
2643 | case R_390_TLS_IE64: | |
2644 | if (info->shared) | |
2645 | { | |
2646 | Elf_Internal_Rela outrel; | |
2647 | asection *sreloc; | |
2648 | bfd_byte *loc; | |
2649 | ||
2650 | outrel.r_offset = rel->r_offset | |
2651 | + input_section->output_section->vma | |
2652 | + input_section->output_offset; | |
2653 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
2654 | sreloc = elf_section_data (input_section)->sreloc; | |
2655 | if (sreloc == NULL) | |
2656 | abort (); | |
2657 | loc = sreloc->contents; | |
2658 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2659 | bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); | |
2660 | } | |
ae9a127f | 2661 | /* Fall through. */ |
69fc87f1 MS |
2662 | |
2663 | case R_390_TLS_GD64: | |
2664 | case R_390_TLS_GOTIE64: | |
2665 | r_type = elf_s390_tls_transition (info, r_type, h == NULL); | |
2666 | tls_type = GOT_UNKNOWN; | |
2667 | if (h == NULL && local_got_offsets) | |
2668 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2669 | else if (h != NULL) | |
2670 | { | |
2671 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2672 | if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) | |
2673 | r_type = R_390_TLS_LE64; | |
2674 | } | |
2675 | if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) | |
2676 | r_type = R_390_TLS_IE64; | |
2677 | ||
2678 | if (r_type == R_390_TLS_LE64) | |
2679 | { | |
2680 | /* This relocation gets optimized away by the local exec | |
2681 | access optimization. */ | |
2682 | BFD_ASSERT (! unresolved_reloc); | |
2683 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2684 | contents + rel->r_offset); | |
2685 | continue; | |
2686 | } | |
2687 | ||
2688 | if (htab->sgot == NULL) | |
2689 | abort (); | |
2690 | ||
2691 | if (h != NULL) | |
2692 | off = h->got.offset; | |
2693 | else | |
2694 | { | |
2695 | if (local_got_offsets == NULL) | |
2696 | abort (); | |
2697 | ||
2698 | off = local_got_offsets[r_symndx]; | |
2699 | } | |
2700 | ||
2701 | emit_tls_relocs: | |
2702 | ||
2703 | if ((off & 1) != 0) | |
2704 | off &= ~1; | |
26e41594 | 2705 | else |
69fc87f1 MS |
2706 | { |
2707 | Elf_Internal_Rela outrel; | |
2708 | bfd_byte *loc; | |
2709 | int dr_type, indx; | |
2710 | ||
2711 | if (htab->srelgot == NULL) | |
2712 | abort (); | |
2713 | ||
2714 | outrel.r_offset = (htab->sgot->output_section->vma | |
2715 | + htab->sgot->output_offset + off); | |
2716 | ||
2717 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2718 | if (r_type == R_390_TLS_GD64) | |
2719 | dr_type = R_390_TLS_DTPMOD; | |
2720 | else | |
2721 | dr_type = R_390_TLS_TPOFF; | |
2722 | if (dr_type == R_390_TLS_TPOFF && indx == 0) | |
2723 | outrel.r_addend = relocation - dtpoff_base (info); | |
2724 | else | |
2725 | outrel.r_addend = 0; | |
2726 | outrel.r_info = ELF64_R_INFO (indx, dr_type); | |
2727 | loc = htab->srelgot->contents; | |
2728 | loc += htab->srelgot->reloc_count++ | |
2729 | * sizeof (Elf64_External_Rela); | |
2730 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2731 | ||
2732 | if (r_type == R_390_TLS_GD64) | |
2733 | { | |
2734 | if (indx == 0) | |
2735 | { | |
2736 | BFD_ASSERT (! unresolved_reloc); | |
2737 | bfd_put_64 (output_bfd, | |
2738 | relocation - dtpoff_base (info), | |
2739 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2740 | } | |
2741 | else | |
2742 | { | |
2743 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); | |
2744 | outrel.r_offset += GOT_ENTRY_SIZE; | |
2745 | outrel.r_addend = 0; | |
2746 | htab->srelgot->reloc_count++; | |
2747 | loc += sizeof (Elf64_External_Rela); | |
2748 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2749 | } | |
2750 | } | |
2751 | ||
2752 | if (h != NULL) | |
2753 | h->got.offset |= 1; | |
2754 | else | |
2755 | local_got_offsets[r_symndx] |= 1; | |
2756 | } | |
2757 | ||
2758 | if (off >= (bfd_vma) -2) | |
2759 | abort (); | |
2760 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
2761 | { | |
2762 | relocation = htab->sgot->output_offset + off; | |
2763 | if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) | |
2764 | relocation += htab->sgot->output_section->vma; | |
2765 | unresolved_reloc = FALSE; | |
2766 | } | |
2767 | else | |
2768 | { | |
2769 | bfd_put_64 (output_bfd, htab->sgot->output_offset + off, | |
2770 | contents + rel->r_offset); | |
2771 | continue; | |
2772 | } | |
2773 | break; | |
2774 | ||
2775 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 2776 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
2777 | case R_390_TLS_IEENT: |
2778 | if (h == NULL) | |
2779 | { | |
2780 | if (local_got_offsets == NULL) | |
2781 | abort(); | |
2782 | off = local_got_offsets[r_symndx]; | |
2783 | if (info->shared) | |
2784 | goto emit_tls_relocs; | |
2785 | } | |
2786 | else | |
2787 | { | |
2788 | off = h->got.offset; | |
2789 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2790 | if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) | |
2791 | goto emit_tls_relocs; | |
2792 | } | |
2793 | ||
2794 | if (htab->sgot == NULL) | |
2795 | abort (); | |
2796 | ||
2797 | BFD_ASSERT (! unresolved_reloc); | |
2798 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2799 | htab->sgot->contents + off); | |
2800 | relocation = htab->sgot->output_offset + off; | |
2801 | if (r_type == R_390_TLS_IEENT) | |
2802 | relocation += htab->sgot->output_section->vma; | |
2803 | unresolved_reloc = FALSE; | |
2804 | break; | |
2805 | ||
2806 | case R_390_TLS_LDM64: | |
2807 | if (! info->shared) | |
2808 | /* The literal pool entry this relocation refers to gets ignored | |
2809 | by the optimized code of the local exec model. Do nothing | |
2810 | and the value will turn out zero. */ | |
2811 | continue; | |
2812 | ||
2813 | if (htab->sgot == NULL) | |
2814 | abort (); | |
2815 | ||
2816 | off = htab->tls_ldm_got.offset; | |
2817 | if (off & 1) | |
2818 | off &= ~1; | |
2819 | else | |
2820 | { | |
2821 | Elf_Internal_Rela outrel; | |
2822 | bfd_byte *loc; | |
2823 | ||
2824 | if (htab->srelgot == NULL) | |
2825 | abort (); | |
2826 | ||
2827 | outrel.r_offset = (htab->sgot->output_section->vma | |
2828 | + htab->sgot->output_offset + off); | |
2829 | ||
2830 | bfd_put_64 (output_bfd, 0, | |
2831 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2832 | outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); | |
2833 | outrel.r_addend = 0; | |
2834 | loc = htab->srelgot->contents; | |
2835 | loc += htab->srelgot->reloc_count++ | |
2836 | * sizeof (Elf64_External_Rela); | |
2837 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2838 | htab->tls_ldm_got.offset |= 1; | |
2839 | } | |
2840 | relocation = htab->sgot->output_offset + off; | |
26e41594 | 2841 | unresolved_reloc = FALSE; |
69fc87f1 MS |
2842 | break; |
2843 | ||
2844 | case R_390_TLS_LE64: | |
2845 | if (info->shared) | |
2846 | { | |
2847 | /* Linking a shared library with non-fpic code requires | |
2848 | a R_390_TLS_TPOFF relocation. */ | |
2849 | Elf_Internal_Rela outrel; | |
2850 | asection *sreloc; | |
2851 | bfd_byte *loc; | |
2852 | int indx; | |
2853 | ||
2854 | outrel.r_offset = rel->r_offset | |
2855 | + input_section->output_section->vma | |
2856 | + input_section->output_offset; | |
2857 | if (h != NULL && h->dynindx != -1) | |
2858 | indx = h->dynindx; | |
2859 | else | |
2860 | indx = 0; | |
2861 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); | |
2862 | if (indx == 0) | |
2863 | outrel.r_addend = relocation - dtpoff_base (info); | |
2864 | else | |
2865 | outrel.r_addend = 0; | |
2866 | sreloc = elf_section_data (input_section)->sreloc; | |
2867 | if (sreloc == NULL) | |
2868 | abort (); | |
2869 | loc = sreloc->contents; | |
2870 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2871 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2872 | } | |
2873 | else | |
2874 | { | |
2875 | BFD_ASSERT (! unresolved_reloc); | |
2876 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2877 | contents + rel->r_offset); | |
2878 | } | |
2879 | continue; | |
2880 | ||
2881 | case R_390_TLS_LDO64: | |
2882 | if (info->shared || (input_section->flags & SEC_CODE) == 0) | |
2883 | relocation -= dtpoff_base (info); | |
2884 | else | |
2885 | /* When converting LDO to LE, we must negate. */ | |
2886 | relocation = -tpoff (info, relocation); | |
2887 | break; | |
2888 | ||
2889 | /* Relocations for tls instructions. */ | |
2890 | case R_390_TLS_LOAD: | |
2891 | case R_390_TLS_GDCALL: | |
2892 | case R_390_TLS_LDCALL: | |
2893 | tls_type = GOT_UNKNOWN; | |
2894 | if (h == NULL && local_got_offsets) | |
2895 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2896 | else if (h != NULL) | |
2897 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2898 | ||
2899 | if (tls_type == GOT_TLS_GD) | |
2900 | continue; | |
2901 | ||
2902 | if (r_type == R_390_TLS_LOAD) | |
2903 | { | |
2904 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2905 | { | |
2906 | /* IE->LE transition. Four valid cases: | |
2907 | lg %rx,(0,%ry) -> sllg %rx,%ry,0 | |
2908 | lg %rx,(%ry,0) -> sllg %rx,%ry,0 | |
2909 | lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 | |
2910 | lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ | |
2911 | unsigned int insn0, insn1, ry; | |
2912 | ||
2913 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2914 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2915 | if (insn1 != 0x0004) | |
2916 | invalid_tls_insn (input_bfd, input_section, rel); | |
2917 | ry = 0; | |
2918 | if ((insn0 & 0xff00f000) == 0xe3000000) | |
2919 | /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ | |
2920 | ry = (insn0 & 0x000f0000); | |
2921 | else if ((insn0 & 0xff0f0000) == 0xe3000000) | |
2922 | /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ | |
2923 | ry = (insn0 & 0x0000f000) << 4; | |
2924 | else if ((insn0 & 0xff00f000) == 0xe300c000) | |
2925 | /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ | |
2926 | ry = (insn0 & 0x000f0000); | |
2927 | else if ((insn0 & 0xff0f0000) == 0xe30c0000) | |
2928 | /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ | |
2929 | ry = (insn0 & 0x0000f000) << 4; | |
2930 | else | |
2931 | invalid_tls_insn (input_bfd, input_section, rel); | |
2932 | insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; | |
2933 | insn1 = 0x000d; | |
2934 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2935 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2936 | } | |
2937 | } | |
2938 | else if (r_type == R_390_TLS_GDCALL) | |
2939 | { | |
2940 | unsigned int insn0, insn1; | |
2941 | ||
2942 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2943 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2944 | if ((insn0 & 0xffff0000) != 0xc0e50000) | |
2945 | invalid_tls_insn (input_bfd, input_section, rel); | |
2946 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2947 | { | |
2948 | /* GD->LE transition. | |
2949 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ | |
2950 | insn0 = 0xc0040000; | |
2951 | insn1 = 0x0000; | |
2952 | } | |
2953 | else | |
2954 | { | |
2955 | /* GD->IE transition. | |
2956 | brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ | |
2957 | insn0 = 0xe322c000; | |
2958 | insn1 = 0x0004; | |
2959 | } | |
2960 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2961 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2962 | } | |
2963 | else if (r_type == R_390_TLS_LDCALL) | |
2964 | { | |
2965 | if (!info->shared) | |
2966 | { | |
2967 | unsigned int insn0, insn1; | |
2968 | ||
2969 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2970 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2971 | if ((insn0 & 0xffff0000) != 0xc0e50000) | |
2972 | invalid_tls_insn (input_bfd, input_section, rel); | |
2973 | /* LD->LE transition. | |
2974 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ | |
2975 | insn0 = 0xc0040000; | |
2976 | insn1 = 0x0000; | |
2977 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2978 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2979 | } | |
2980 | } | |
2981 | continue; | |
2982 | ||
947216bf AM |
2983 | default: |
2984 | break; | |
2985 | } | |
a85d7ed0 | 2986 | |
239e1f3a AM |
2987 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
2988 | because such sections are not SEC_ALLOC and thus ld.so will | |
2989 | not process them. */ | |
0451c93c | 2990 | if (unresolved_reloc |
239e1f3a | 2991 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
0451c93c MS |
2992 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
2993 | (*_bfd_error_handler) | |
2994 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), | |
2995 | bfd_archive_filename (input_bfd), | |
2996 | bfd_get_section_name (input_bfd, input_section), | |
2997 | (long) rel->r_offset, | |
2998 | h->root.root.string); | |
2999 | ||
bd1ea41b MS |
3000 | if (r_type == R_390_20 |
3001 | || r_type == R_390_GOT20 | |
3002 | || r_type == R_390_GOTPLT20 | |
3003 | || r_type == R_390_TLS_GOTIE20) | |
3004 | { | |
3005 | relocation += rel->r_addend; | |
3006 | relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; | |
3007 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3008 | contents, rel->r_offset, | |
3009 | relocation, 0); | |
3010 | } | |
3011 | else | |
3012 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
a85d7ed0 NC |
3013 | contents, rel->r_offset, |
3014 | relocation, rel->r_addend); | |
3015 | ||
3016 | if (r != bfd_reloc_ok) | |
3017 | { | |
0451c93c | 3018 | const char *name; |
ec338859 | 3019 | |
0451c93c MS |
3020 | if (h != NULL) |
3021 | name = h->root.root.string; | |
3022 | else | |
a85d7ed0 | 3023 | { |
0451c93c MS |
3024 | name = bfd_elf_string_from_elf_section (input_bfd, |
3025 | symtab_hdr->sh_link, | |
3026 | sym->st_name); | |
3027 | if (name == NULL) | |
b34976b6 | 3028 | return FALSE; |
0451c93c MS |
3029 | if (*name == '\0') |
3030 | name = bfd_section_name (input_bfd, sec); | |
3031 | } | |
ec338859 | 3032 | |
0451c93c MS |
3033 | if (r == bfd_reloc_overflow) |
3034 | { | |
ec338859 | 3035 | |
0451c93c MS |
3036 | if (! ((*info->callbacks->reloc_overflow) |
3037 | (info, name, howto->name, (bfd_vma) 0, | |
3038 | input_bfd, input_section, rel->r_offset))) | |
b34976b6 | 3039 | return FALSE; |
0451c93c MS |
3040 | } |
3041 | else | |
3042 | { | |
3043 | (*_bfd_error_handler) | |
3044 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), | |
3045 | bfd_archive_filename (input_bfd), | |
3046 | bfd_get_section_name (input_bfd, input_section), | |
3047 | (long) rel->r_offset, name, (int) r); | |
b34976b6 | 3048 | return FALSE; |
a85d7ed0 NC |
3049 | } |
3050 | } | |
3051 | } | |
3052 | ||
b34976b6 | 3053 | return TRUE; |
a85d7ed0 NC |
3054 | } |
3055 | ||
3056 | /* Finish up dynamic symbol handling. We set the contents of various | |
3057 | dynamic sections here. */ | |
3058 | ||
b34976b6 | 3059 | static bfd_boolean |
a85d7ed0 NC |
3060 | elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) |
3061 | bfd *output_bfd; | |
3062 | struct bfd_link_info *info; | |
3063 | struct elf_link_hash_entry *h; | |
3064 | Elf_Internal_Sym *sym; | |
3065 | { | |
0451c93c | 3066 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 | 3067 | |
0451c93c | 3068 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
3069 | |
3070 | if (h->plt.offset != (bfd_vma) -1) | |
3071 | { | |
a85d7ed0 | 3072 | bfd_vma plt_index; |
0451c93c MS |
3073 | bfd_vma got_offset; |
3074 | Elf_Internal_Rela rela; | |
947216bf | 3075 | bfd_byte *loc; |
a85d7ed0 NC |
3076 | |
3077 | /* This symbol has an entry in the procedure linkage table. Set | |
947216bf | 3078 | it up. */ |
a85d7ed0 | 3079 | |
0451c93c MS |
3080 | if (h->dynindx == -1 |
3081 | || htab->splt == NULL | |
3082 | || htab->sgotplt == NULL | |
3083 | || htab->srelplt == NULL) | |
3084 | abort (); | |
a85d7ed0 | 3085 | |
99c79b2e | 3086 | /* Calc. index no. |
947216bf | 3087 | Current offset - size first entry / entry size. */ |
a85d7ed0 NC |
3088 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
3089 | ||
3090 | /* Offset in GOT is PLT index plus GOT headers(3) times 8, | |
947216bf | 3091 | addr & GOT addr. */ |
a85d7ed0 NC |
3092 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
3093 | ||
3094 | /* Fill in the blueprint of a PLT. */ | |
0451c93c MS |
3095 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, |
3096 | htab->splt->contents + h->plt.offset); | |
3097 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, | |
3098 | htab->splt->contents + h->plt.offset + 4); | |
3099 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, | |
3100 | htab->splt->contents + h->plt.offset + 8); | |
3101 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, | |
3102 | htab->splt->contents + h->plt.offset + 12); | |
3103 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, | |
3104 | htab->splt->contents + h->plt.offset + 16); | |
3105 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5, | |
3106 | htab->splt->contents + h->plt.offset + 20); | |
3107 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6, | |
3108 | htab->splt->contents + h->plt.offset + 24); | |
3109 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7, | |
3110 | htab->splt->contents + h->plt.offset + 28); | |
a85d7ed0 NC |
3111 | /* Fixup the relative address to the GOT entry */ |
3112 | bfd_put_32 (output_bfd, | |
0451c93c MS |
3113 | (htab->sgotplt->output_section->vma + |
3114 | htab->sgotplt->output_offset + got_offset | |
3115 | - (htab->splt->output_section->vma + h->plt.offset))/2, | |
3116 | htab->splt->contents + h->plt.offset + 2); | |
a85d7ed0 NC |
3117 | /* Fixup the relative branch to PLT 0 */ |
3118 | bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + | |
3119 | (PLT_ENTRY_SIZE * plt_index) + 22)/2, | |
0451c93c | 3120 | htab->splt->contents + h->plt.offset + 24); |
a85d7ed0 NC |
3121 | /* Fixup offset into symbol table */ |
3122 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), | |
0451c93c | 3123 | htab->splt->contents + h->plt.offset + 28); |
a85d7ed0 NC |
3124 | |
3125 | /* Fill in the entry in the global offset table. | |
947216bf | 3126 | Points to instruction after GOT offset. */ |
a85d7ed0 | 3127 | bfd_put_64 (output_bfd, |
0451c93c MS |
3128 | (htab->splt->output_section->vma |
3129 | + htab->splt->output_offset | |
a85d7ed0 NC |
3130 | + h->plt.offset |
3131 | + 14), | |
0451c93c | 3132 | htab->sgotplt->contents + got_offset); |
a85d7ed0 | 3133 | |
0451c93c MS |
3134 | /* Fill in the entry in the .rela.plt section. */ |
3135 | rela.r_offset = (htab->sgotplt->output_section->vma | |
3136 | + htab->sgotplt->output_offset | |
3137 | + got_offset); | |
3138 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); | |
3139 | rela.r_addend = 0; | |
947216bf | 3140 | loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
0451c93c | 3141 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3142 | |
3143 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3144 | { | |
3145 | /* Mark the symbol as undefined, rather than as defined in | |
0451c93c MS |
3146 | the .plt section. Leave the value alone. This is a clue |
3147 | for the dynamic linker, to make function pointer | |
3148 | comparisons work between an application and shared | |
3149 | library. */ | |
a85d7ed0 NC |
3150 | sym->st_shndx = SHN_UNDEF; |
3151 | } | |
3152 | } | |
3153 | ||
69fc87f1 MS |
3154 | if (h->got.offset != (bfd_vma) -1 |
3155 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD | |
3156 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE | |
3157 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) | |
a85d7ed0 | 3158 | { |
a85d7ed0 | 3159 | Elf_Internal_Rela rela; |
947216bf | 3160 | bfd_byte *loc; |
a85d7ed0 NC |
3161 | |
3162 | /* This symbol has an entry in the global offset table. Set it | |
947216bf | 3163 | up. */ |
0451c93c MS |
3164 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3165 | abort (); | |
a85d7ed0 | 3166 | |
0451c93c MS |
3167 | rela.r_offset = (htab->sgot->output_section->vma |
3168 | + htab->sgot->output_offset | |
dc810e39 | 3169 | + (h->got.offset &~ (bfd_vma) 1)); |
a85d7ed0 NC |
3170 | |
3171 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3172 | symbol is defined locally or was forced to be local because | |
3173 | of a version file, we just want to emit a RELATIVE reloc. | |
3174 | The entry in the global offset table will already have been | |
3175 | initialized in the relocate_section function. */ | |
0451c93c MS |
3176 | if (info->shared |
3177 | && (info->symbolic | |
3178 | || h->dynindx == -1 | |
3179 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
3180 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
947216bf | 3181 | { |
0451c93c | 3182 | BFD_ASSERT((h->got.offset & 1) != 0); |
947216bf AM |
3183 | rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
3184 | rela.r_addend = (h->root.u.def.value | |
3185 | + h->root.u.def.section->output_section->vma | |
3186 | + h->root.u.def.section->output_offset); | |
3187 | } | |
a85d7ed0 NC |
3188 | else |
3189 | { | |
3190 | BFD_ASSERT((h->got.offset & 1) == 0); | |
0451c93c | 3191 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); |
a85d7ed0 | 3192 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); |
947216bf AM |
3193 | rela.r_addend = 0; |
3194 | } | |
a85d7ed0 | 3195 | |
947216bf AM |
3196 | loc = htab->srelgot->contents; |
3197 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
0451c93c | 3198 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3199 | } |
3200 | ||
3201 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
3202 | { | |
a85d7ed0 | 3203 | Elf_Internal_Rela rela; |
947216bf | 3204 | bfd_byte *loc; |
a85d7ed0 NC |
3205 | |
3206 | /* This symbols needs a copy reloc. Set it up. */ | |
3207 | ||
0451c93c MS |
3208 | if (h->dynindx == -1 |
3209 | || (h->root.type != bfd_link_hash_defined | |
3210 | && h->root.type != bfd_link_hash_defweak) | |
3211 | || htab->srelbss == NULL) | |
3212 | abort (); | |
a85d7ed0 NC |
3213 | |
3214 | rela.r_offset = (h->root.u.def.value | |
3215 | + h->root.u.def.section->output_section->vma | |
3216 | + h->root.u.def.section->output_offset); | |
3217 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); | |
3218 | rela.r_addend = 0; | |
947216bf AM |
3219 | loc = htab->srelbss->contents; |
3220 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); | |
0451c93c | 3221 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3222 | } |
3223 | ||
3224 | /* Mark some specially defined symbols as absolute. */ | |
3225 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3226 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 | |
3227 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) | |
3228 | sym->st_shndx = SHN_ABS; | |
3229 | ||
b34976b6 | 3230 | return TRUE; |
a85d7ed0 NC |
3231 | } |
3232 | ||
0451c93c MS |
3233 | /* Used to decide how to sort relocs in an optimal manner for the |
3234 | dynamic linker, before writing them out. */ | |
3235 | ||
3236 | static enum elf_reloc_type_class | |
3237 | elf_s390_reloc_type_class (rela) | |
3238 | const Elf_Internal_Rela *rela; | |
3239 | { | |
3240 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
3241 | { | |
3242 | case R_390_RELATIVE: | |
3243 | return reloc_class_relative; | |
3244 | case R_390_JMP_SLOT: | |
3245 | return reloc_class_plt; | |
3246 | case R_390_COPY: | |
3247 | return reloc_class_copy; | |
3248 | default: | |
3249 | return reloc_class_normal; | |
3250 | } | |
3251 | } | |
3252 | ||
a85d7ed0 NC |
3253 | /* Finish up the dynamic sections. */ |
3254 | ||
b34976b6 | 3255 | static bfd_boolean |
a85d7ed0 NC |
3256 | elf_s390_finish_dynamic_sections (output_bfd, info) |
3257 | bfd *output_bfd; | |
3258 | struct bfd_link_info *info; | |
3259 | { | |
0451c93c | 3260 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
3261 | bfd *dynobj; |
3262 | asection *sdyn; | |
a85d7ed0 | 3263 | |
0451c93c MS |
3264 | htab = elf_s390_hash_table (info); |
3265 | dynobj = htab->elf.dynobj; | |
a85d7ed0 NC |
3266 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3267 | ||
0451c93c | 3268 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 | 3269 | { |
a85d7ed0 NC |
3270 | Elf64_External_Dyn *dyncon, *dynconend; |
3271 | ||
0451c93c MS |
3272 | if (sdyn == NULL || htab->sgot == NULL) |
3273 | abort (); | |
a85d7ed0 NC |
3274 | |
3275 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
eea6121a | 3276 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
a85d7ed0 NC |
3277 | for (; dyncon < dynconend; dyncon++) |
3278 | { | |
3279 | Elf_Internal_Dyn dyn; | |
a85d7ed0 | 3280 | asection *s; |
ec338859 | 3281 | |
a85d7ed0 | 3282 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
ec338859 | 3283 | |
a85d7ed0 NC |
3284 | switch (dyn.d_tag) |
3285 | { | |
3286 | default: | |
0451c93c | 3287 | continue; |
ec338859 | 3288 | |
a85d7ed0 | 3289 | case DT_PLTGOT: |
0451c93c MS |
3290 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
3291 | break; | |
ec338859 | 3292 | |
a85d7ed0 | 3293 | case DT_JMPREL: |
0451c93c | 3294 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
a85d7ed0 | 3295 | break; |
ec338859 | 3296 | |
a85d7ed0 | 3297 | case DT_PLTRELSZ: |
0451c93c | 3298 | s = htab->srelplt->output_section; |
eea6121a | 3299 | dyn.d_un.d_val = s->size; |
a85d7ed0 | 3300 | break; |
ec338859 | 3301 | |
a85d7ed0 NC |
3302 | case DT_RELASZ: |
3303 | /* The procedure linkage table relocs (DT_JMPREL) should | |
3304 | not be included in the overall relocs (DT_RELA). | |
3305 | Therefore, we override the DT_RELASZ entry here to | |
3306 | make it not include the JMPREL relocs. Since the | |
3307 | linker script arranges for .rela.plt to follow all | |
3308 | other relocation sections, we don't have to worry | |
3309 | about changing the DT_RELA entry. */ | |
0451c93c | 3310 | s = htab->srelplt->output_section; |
eea6121a | 3311 | dyn.d_un.d_val -= s->size; |
a85d7ed0 NC |
3312 | break; |
3313 | } | |
0451c93c MS |
3314 | |
3315 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); | |
a85d7ed0 NC |
3316 | } |
3317 | ||
3318 | /* Fill in the special first entry in the procedure linkage table. */ | |
eea6121a | 3319 | if (htab->splt && htab->splt->size > 0) |
a85d7ed0 NC |
3320 | { |
3321 | /* fill in blueprint for plt 0 entry */ | |
0451c93c MS |
3322 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0, |
3323 | htab->splt->contents ); | |
3324 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, | |
3325 | htab->splt->contents +4 ); | |
3326 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, | |
3327 | htab->splt->contents +12 ); | |
3328 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, | |
3329 | htab->splt->contents +16 ); | |
3330 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, | |
3331 | htab->splt->contents +20 ); | |
3332 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6, | |
3333 | htab->splt->contents + 24); | |
3334 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7, | |
3335 | htab->splt->contents + 28 ); | |
a85d7ed0 NC |
3336 | /* Fixup relative address to start of GOT */ |
3337 | bfd_put_32 (output_bfd, | |
0451c93c MS |
3338 | (htab->sgotplt->output_section->vma + |
3339 | htab->sgotplt->output_offset | |
3340 | - htab->splt->output_section->vma - 6)/2, | |
3341 | htab->splt->contents + 8); | |
a85d7ed0 | 3342 | } |
0451c93c MS |
3343 | elf_section_data (htab->splt->output_section) |
3344 | ->this_hdr.sh_entsize = PLT_ENTRY_SIZE; | |
a85d7ed0 NC |
3345 | } |
3346 | ||
0451c93c | 3347 | if (htab->sgotplt) |
a85d7ed0 | 3348 | { |
0451c93c | 3349 | /* Fill in the first three entries in the global offset table. */ |
eea6121a | 3350 | if (htab->sgotplt->size > 0) |
0451c93c MS |
3351 | { |
3352 | bfd_put_64 (output_bfd, | |
3353 | (sdyn == NULL ? (bfd_vma) 0 | |
3354 | : sdyn->output_section->vma + sdyn->output_offset), | |
3355 | htab->sgotplt->contents); | |
3356 | /* One entry for shared object struct ptr. */ | |
3357 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
3358 | /* One entry for _dl_runtime_resolve. */ | |
3359 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12); | |
3360 | } | |
a85d7ed0 | 3361 | |
0451c93c MS |
3362 | elf_section_data (htab->sgot->output_section) |
3363 | ->this_hdr.sh_entsize = 8; | |
3364 | } | |
b34976b6 | 3365 | return TRUE; |
a85d7ed0 NC |
3366 | } |
3367 | ||
4c45e5c9 JJ |
3368 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
3369 | or (bfd_vma) -1 if it should not be included. */ | |
3370 | ||
3371 | static bfd_vma | |
3372 | elf_s390_plt_sym_val (bfd_vma i, const asection *plt, | |
3373 | const arelent *rel ATTRIBUTE_UNUSED) | |
3374 | { | |
3375 | return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; | |
3376 | } | |
3377 | ||
3378 | ||
ae9a127f NC |
3379 | /* Why was the hash table entry size definition changed from |
3380 | ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and | |
3381 | this is the only reason for the s390_elf64_size_info structure. */ | |
a85d7ed0 NC |
3382 | |
3383 | const struct elf_size_info s390_elf64_size_info = | |
3384 | { | |
3385 | sizeof (Elf64_External_Ehdr), | |
3386 | sizeof (Elf64_External_Phdr), | |
3387 | sizeof (Elf64_External_Shdr), | |
3388 | sizeof (Elf64_External_Rel), | |
3389 | sizeof (Elf64_External_Rela), | |
3390 | sizeof (Elf64_External_Sym), | |
3391 | sizeof (Elf64_External_Dyn), | |
3392 | sizeof (Elf_External_Note), | |
ae9a127f NC |
3393 | 8, /* hash-table entry size. */ |
3394 | 1, /* internal relocations per external relocations. */ | |
3395 | 64, /* arch_size. */ | |
45d6a902 | 3396 | 3, /* log_file_align. */ |
a85d7ed0 NC |
3397 | ELFCLASS64, EV_CURRENT, |
3398 | bfd_elf64_write_out_phdrs, | |
3399 | bfd_elf64_write_shdrs_and_ehdr, | |
3400 | bfd_elf64_write_relocs, | |
73ff0d56 | 3401 | bfd_elf64_swap_symbol_in, |
a85d7ed0 NC |
3402 | bfd_elf64_swap_symbol_out, |
3403 | bfd_elf64_slurp_reloc_table, | |
3404 | bfd_elf64_slurp_symbol_table, | |
3405 | bfd_elf64_swap_dyn_in, | |
3406 | bfd_elf64_swap_dyn_out, | |
947216bf AM |
3407 | bfd_elf64_swap_reloc_in, |
3408 | bfd_elf64_swap_reloc_out, | |
3409 | bfd_elf64_swap_reloca_in, | |
3410 | bfd_elf64_swap_reloca_out | |
a85d7ed0 NC |
3411 | }; |
3412 | ||
3413 | #define TARGET_BIG_SYM bfd_elf64_s390_vec | |
3414 | #define TARGET_BIG_NAME "elf64-s390" | |
3415 | #define ELF_ARCH bfd_arch_s390 | |
3416 | #define ELF_MACHINE_CODE EM_S390 | |
3417 | #define ELF_MACHINE_ALT1 EM_S390_OLD | |
3418 | #define ELF_MAXPAGESIZE 0x1000 | |
3419 | ||
3420 | #define elf_backend_size_info s390_elf64_size_info | |
3421 | ||
3422 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3423 | #define elf_backend_can_refcount 1 |
a85d7ed0 NC |
3424 | #define elf_backend_want_got_plt 1 |
3425 | #define elf_backend_plt_readonly 1 | |
3426 | #define elf_backend_want_plt_sym 0 | |
3427 | #define elf_backend_got_header_size 24 | |
b491616a | 3428 | #define elf_backend_rela_normal 1 |
a85d7ed0 NC |
3429 | |
3430 | #define elf_info_to_howto elf_s390_info_to_howto | |
3431 | ||
a85d7ed0 NC |
3432 | #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name |
3433 | #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create | |
3434 | #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup | |
3435 | ||
3436 | #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol | |
3437 | #define elf_backend_check_relocs elf_s390_check_relocs | |
0451c93c MS |
3438 | #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol |
3439 | #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections | |
a85d7ed0 NC |
3440 | #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections |
3441 | #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol | |
3442 | #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook | |
3443 | #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook | |
0451c93c | 3444 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
a85d7ed0 NC |
3445 | #define elf_backend_relocate_section elf_s390_relocate_section |
3446 | #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections | |
29c2fb7c | 3447 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
4c45e5c9 | 3448 | #define elf_backend_plt_sym_val elf_s390_plt_sym_val |
a85d7ed0 | 3449 | |
69fc87f1 MS |
3450 | #define bfd_elf64_mkobject elf_s390_mkobject |
3451 | #define elf_backend_object_p elf_s390_object_p | |
a85d7ed0 NC |
3452 | |
3453 | #include "elf64-target.h" |