Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
e92d460e | 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 |
638632bd | 3 | Free Software Foundation, Inc. |
252b5132 RH |
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 02111-1307, USA. */ | |
20 | ||
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "bfdlink.h" | |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
26 | ||
27 | static reloc_howto_type *elf_i386_reloc_type_lookup | |
28 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
29 | static void elf_i386_info_to_howto | |
30 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
31 | static void elf_i386_info_to_howto_rel | |
32 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); | |
ebe50bae AM |
33 | static boolean elf_i386_is_local_label_name |
34 | PARAMS ((bfd *, const char *)); | |
38701953 AM |
35 | static boolean elf_i386_grok_prstatus |
36 | PARAMS ((bfd *abfd, Elf_Internal_Note *note)); | |
37 | static boolean elf_i386_grok_psinfo | |
38 | PARAMS ((bfd *abfd, Elf_Internal_Note *note)); | |
39 | static struct bfd_hash_entry *link_hash_newfunc | |
252b5132 RH |
40 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
41 | static struct bfd_link_hash_table *elf_i386_link_hash_table_create | |
42 | PARAMS ((bfd *)); | |
ebe50bae AM |
43 | static boolean create_got_section |
44 | PARAMS((bfd *, struct bfd_link_info *)); | |
6725bdbf AM |
45 | static boolean elf_i386_create_dynamic_sections |
46 | PARAMS((bfd *, struct bfd_link_info *)); | |
51b64d56 | 47 | static void elf_i386_copy_indirect_symbol |
ebe50bae | 48 | PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *)); |
13ae64f3 JJ |
49 | static int elf_i386_tls_transition |
50 | PARAMS ((struct bfd_link_info *, int, int)); | |
51 | ||
52 | static boolean elf_i386_mkobject | |
53 | PARAMS((bfd *)); | |
54 | static boolean elf_i386_object_p | |
55 | PARAMS((bfd *)); | |
252b5132 RH |
56 | static boolean elf_i386_check_relocs |
57 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
58 | const Elf_Internal_Rela *)); | |
a7b97311 | 59 | static asection *elf_i386_gc_mark_hook |
1e2f5b6e | 60 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
a7b97311 AM |
61 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
62 | static boolean elf_i386_gc_sweep_hook | |
63 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
64 | const Elf_Internal_Rela *)); | |
252b5132 RH |
65 | static boolean elf_i386_adjust_dynamic_symbol |
66 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
0c715baa AM |
67 | static boolean allocate_dynrelocs |
68 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
69 | static boolean readonly_dynrelocs | |
6725bdbf | 70 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
38701953 AM |
71 | static boolean elf_i386_fake_sections |
72 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *)); | |
252b5132 RH |
73 | static boolean elf_i386_size_dynamic_sections |
74 | PARAMS ((bfd *, struct bfd_link_info *)); | |
13ae64f3 JJ |
75 | static bfd_vma dtpoff_base |
76 | PARAMS ((struct bfd_link_info *)); | |
77 | static bfd_vma tpoff | |
78 | PARAMS ((struct bfd_link_info *, bfd_vma)); | |
252b5132 RH |
79 | static boolean elf_i386_relocate_section |
80 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
81 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
82 | static boolean elf_i386_finish_dynamic_symbol | |
83 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, | |
84 | Elf_Internal_Sym *)); | |
f51e552e AM |
85 | static enum elf_reloc_type_class elf_i386_reloc_type_class |
86 | PARAMS ((const Elf_Internal_Rela *)); | |
38701953 AM |
87 | static boolean elf_i386_finish_dynamic_sections |
88 | PARAMS ((bfd *, struct bfd_link_info *)); | |
252b5132 RH |
89 | |
90 | #define USE_REL 1 /* 386 uses REL relocations instead of RELA */ | |
91 | ||
92 | #include "elf/i386.h" | |
93 | ||
94 | static reloc_howto_type elf_howto_table[]= | |
95 | { | |
1b452ec6 AM |
96 | HOWTO(R_386_NONE, 0, 0, 0, false, 0, complain_overflow_bitfield, |
97 | bfd_elf_generic_reloc, "R_386_NONE", | |
98 | true, 0x00000000, 0x00000000, false), | |
99 | HOWTO(R_386_32, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
100 | bfd_elf_generic_reloc, "R_386_32", | |
101 | true, 0xffffffff, 0xffffffff, false), | |
102 | HOWTO(R_386_PC32, 0, 2, 32, true, 0, complain_overflow_bitfield, | |
103 | bfd_elf_generic_reloc, "R_386_PC32", | |
104 | true, 0xffffffff, 0xffffffff, true), | |
105 | HOWTO(R_386_GOT32, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
106 | bfd_elf_generic_reloc, "R_386_GOT32", | |
107 | true, 0xffffffff, 0xffffffff, false), | |
108 | HOWTO(R_386_PLT32, 0, 2, 32, true, 0, complain_overflow_bitfield, | |
109 | bfd_elf_generic_reloc, "R_386_PLT32", | |
110 | true, 0xffffffff, 0xffffffff, true), | |
111 | HOWTO(R_386_COPY, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
112 | bfd_elf_generic_reloc, "R_386_COPY", | |
113 | true, 0xffffffff, 0xffffffff, false), | |
114 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
115 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", | |
116 | true, 0xffffffff, 0xffffffff, false), | |
117 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
118 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", | |
119 | true, 0xffffffff, 0xffffffff, false), | |
120 | HOWTO(R_386_RELATIVE, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
121 | bfd_elf_generic_reloc, "R_386_RELATIVE", | |
122 | true, 0xffffffff, 0xffffffff, false), | |
123 | HOWTO(R_386_GOTOFF, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
124 | bfd_elf_generic_reloc, "R_386_GOTOFF", | |
125 | true, 0xffffffff, 0xffffffff, false), | |
126 | HOWTO(R_386_GOTPC, 0, 2, 32, true, 0, complain_overflow_bitfield, | |
127 | bfd_elf_generic_reloc, "R_386_GOTPC", | |
128 | true, 0xffffffff, 0xffffffff, true), | |
129 | ||
dc47f327 AM |
130 | /* We have a gap in the reloc numbers here. |
131 | R_386_standard counts the number up to this point, and | |
132 | R_386_ext_offset is the value to subtract from a reloc type of | |
133 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
1b452ec6 | 134 | #define R_386_standard ((unsigned int) R_386_GOTPC + 1) |
13ae64f3 | 135 | #define R_386_ext_offset ((unsigned int) R_386_TLS_LE - R_386_standard) |
1b452ec6 | 136 | |
252b5132 | 137 | /* The remaining relocs are a GNU extension. */ |
13ae64f3 JJ |
138 | HOWTO(R_386_TLS_LE, 0, 2, 32, false, 0, complain_overflow_bitfield, |
139 | bfd_elf_generic_reloc, "R_386_TLS_LE", | |
140 | true, 0xffffffff, 0xffffffff, false), | |
141 | HOWTO(R_386_TLS_GD, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
142 | bfd_elf_generic_reloc, "R_386_TLS_GD", | |
143 | true, 0xffffffff, 0xffffffff, false), | |
144 | HOWTO(R_386_TLS_LDM, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
145 | bfd_elf_generic_reloc, "R_386_TLS_LDM", | |
146 | true, 0xffffffff, 0xffffffff, false), | |
1b452ec6 AM |
147 | HOWTO(R_386_16, 0, 1, 16, false, 0, complain_overflow_bitfield, |
148 | bfd_elf_generic_reloc, "R_386_16", | |
149 | true, 0xffff, 0xffff, false), | |
150 | HOWTO(R_386_PC16, 0, 1, 16, true, 0, complain_overflow_bitfield, | |
151 | bfd_elf_generic_reloc, "R_386_PC16", | |
152 | true, 0xffff, 0xffff, true), | |
153 | HOWTO(R_386_8, 0, 0, 8, false, 0, complain_overflow_bitfield, | |
154 | bfd_elf_generic_reloc, "R_386_8", | |
155 | true, 0xff, 0xff, false), | |
156 | HOWTO(R_386_PC8, 0, 0, 8, true, 0, complain_overflow_signed, | |
157 | bfd_elf_generic_reloc, "R_386_PC8", | |
dc47f327 AM |
158 | true, 0xff, 0xff, true), |
159 | ||
dc47f327 | 160 | #define R_386_ext ((unsigned int) R_386_PC8 + 1 - R_386_ext_offset) |
13ae64f3 JJ |
161 | #define R_386_tls_offset ((unsigned int) R_386_TLS_LDO_32 - R_386_ext) |
162 | /* These are common with Solaris TLS implementation. */ | |
163 | HOWTO(R_386_TLS_LDO_32, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
164 | bfd_elf_generic_reloc, "R_386_TLS_LDO_32", | |
165 | true, 0xffffffff, 0xffffffff, false), | |
166 | HOWTO(R_386_TLS_IE_32, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
167 | bfd_elf_generic_reloc, "R_386_TLS_IE_32", | |
168 | true, 0xffffffff, 0xffffffff, false), | |
169 | HOWTO(R_386_TLS_LE_32, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
170 | bfd_elf_generic_reloc, "R_386_TLS_LE_32", | |
171 | true, 0xffffffff, 0xffffffff, false), | |
172 | HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
173 | bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32", | |
174 | true, 0xffffffff, 0xffffffff, false), | |
175 | HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
176 | bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32", | |
177 | true, 0xffffffff, 0xffffffff, false), | |
178 | HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
179 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF32", | |
180 | true, 0xffffffff, 0xffffffff, false), | |
181 | ||
182 | /* Another gap. */ | |
183 | #define R_386_tls ((unsigned int) R_386_TLS_TPOFF32 + 1 - R_386_tls_offset) | |
184 | #define R_386_vt_offset ((unsigned int) R_386_GNU_VTINHERIT - R_386_tls) | |
252b5132 RH |
185 | |
186 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
187 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
188 | 0, /* rightshift */ | |
189 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
190 | 0, /* bitsize */ | |
191 | false, /* pc_relative */ | |
192 | 0, /* bitpos */ | |
193 | complain_overflow_dont, /* complain_on_overflow */ | |
194 | NULL, /* special_function */ | |
195 | "R_386_GNU_VTINHERIT", /* name */ | |
196 | false, /* partial_inplace */ | |
197 | 0, /* src_mask */ | |
198 | 0, /* dst_mask */ | |
4a335f3d | 199 | false), /* pcrel_offset */ |
252b5132 RH |
200 | |
201 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
202 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
203 | 0, /* rightshift */ | |
204 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
205 | 0, /* bitsize */ | |
206 | false, /* pc_relative */ | |
207 | 0, /* bitpos */ | |
208 | complain_overflow_dont, /* complain_on_overflow */ | |
209 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
210 | "R_386_GNU_VTENTRY", /* name */ | |
211 | false, /* partial_inplace */ | |
212 | 0, /* src_mask */ | |
213 | 0, /* dst_mask */ | |
4a335f3d | 214 | false) /* pcrel_offset */ |
dc47f327 AM |
215 | |
216 | #define R_386_vt ((unsigned int) R_386_GNU_VTENTRY + 1 - R_386_vt_offset) | |
217 | ||
218 | }; | |
219 | ||
252b5132 RH |
220 | #ifdef DEBUG_GEN_RELOC |
221 | #define TRACE(str) fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
222 | #else | |
223 | #define TRACE(str) | |
224 | #endif | |
225 | ||
226 | static reloc_howto_type * | |
227 | elf_i386_reloc_type_lookup (abfd, code) | |
7442e600 | 228 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
229 | bfd_reloc_code_real_type code; |
230 | { | |
231 | switch (code) | |
232 | { | |
233 | case BFD_RELOC_NONE: | |
234 | TRACE ("BFD_RELOC_NONE"); | |
1b452ec6 | 235 | return &elf_howto_table[(unsigned int) R_386_NONE ]; |
252b5132 RH |
236 | |
237 | case BFD_RELOC_32: | |
238 | TRACE ("BFD_RELOC_32"); | |
1b452ec6 | 239 | return &elf_howto_table[(unsigned int) R_386_32 ]; |
252b5132 RH |
240 | |
241 | case BFD_RELOC_CTOR: | |
242 | TRACE ("BFD_RELOC_CTOR"); | |
1b452ec6 | 243 | return &elf_howto_table[(unsigned int) R_386_32 ]; |
252b5132 RH |
244 | |
245 | case BFD_RELOC_32_PCREL: | |
246 | TRACE ("BFD_RELOC_PC32"); | |
1b452ec6 | 247 | return &elf_howto_table[(unsigned int) R_386_PC32 ]; |
252b5132 RH |
248 | |
249 | case BFD_RELOC_386_GOT32: | |
250 | TRACE ("BFD_RELOC_386_GOT32"); | |
1b452ec6 | 251 | return &elf_howto_table[(unsigned int) R_386_GOT32 ]; |
252b5132 RH |
252 | |
253 | case BFD_RELOC_386_PLT32: | |
254 | TRACE ("BFD_RELOC_386_PLT32"); | |
1b452ec6 | 255 | return &elf_howto_table[(unsigned int) R_386_PLT32 ]; |
252b5132 RH |
256 | |
257 | case BFD_RELOC_386_COPY: | |
258 | TRACE ("BFD_RELOC_386_COPY"); | |
1b452ec6 | 259 | return &elf_howto_table[(unsigned int) R_386_COPY ]; |
252b5132 RH |
260 | |
261 | case BFD_RELOC_386_GLOB_DAT: | |
262 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
1b452ec6 | 263 | return &elf_howto_table[(unsigned int) R_386_GLOB_DAT ]; |
252b5132 RH |
264 | |
265 | case BFD_RELOC_386_JUMP_SLOT: | |
266 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
1b452ec6 | 267 | return &elf_howto_table[(unsigned int) R_386_JUMP_SLOT ]; |
252b5132 RH |
268 | |
269 | case BFD_RELOC_386_RELATIVE: | |
270 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
1b452ec6 | 271 | return &elf_howto_table[(unsigned int) R_386_RELATIVE ]; |
252b5132 RH |
272 | |
273 | case BFD_RELOC_386_GOTOFF: | |
274 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
1b452ec6 | 275 | return &elf_howto_table[(unsigned int) R_386_GOTOFF ]; |
252b5132 RH |
276 | |
277 | case BFD_RELOC_386_GOTPC: | |
278 | TRACE ("BFD_RELOC_386_GOTPC"); | |
1b452ec6 | 279 | return &elf_howto_table[(unsigned int) R_386_GOTPC ]; |
252b5132 RH |
280 | |
281 | /* The remaining relocs are a GNU extension. */ | |
13ae64f3 JJ |
282 | case BFD_RELOC_386_TLS_LE: |
283 | TRACE ("BFD_RELOC_386_TLS_LE"); | |
284 | return &elf_howto_table[(unsigned int) R_386_TLS_LE - R_386_ext_offset]; | |
285 | ||
286 | case BFD_RELOC_386_TLS_GD: | |
287 | TRACE ("BFD_RELOC_386_TLS_GD"); | |
288 | return &elf_howto_table[(unsigned int) R_386_TLS_GD - R_386_ext_offset]; | |
289 | ||
290 | case BFD_RELOC_386_TLS_LDM: | |
291 | TRACE ("BFD_RELOC_386_TLS_LDM"); | |
292 | return &elf_howto_table[(unsigned int) R_386_TLS_LDM - R_386_ext_offset]; | |
293 | ||
252b5132 RH |
294 | case BFD_RELOC_16: |
295 | TRACE ("BFD_RELOC_16"); | |
1b452ec6 | 296 | return &elf_howto_table[(unsigned int) R_386_16 - R_386_ext_offset]; |
252b5132 RH |
297 | |
298 | case BFD_RELOC_16_PCREL: | |
299 | TRACE ("BFD_RELOC_16_PCREL"); | |
1b452ec6 | 300 | return &elf_howto_table[(unsigned int) R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
301 | |
302 | case BFD_RELOC_8: | |
303 | TRACE ("BFD_RELOC_8"); | |
1b452ec6 | 304 | return &elf_howto_table[(unsigned int) R_386_8 - R_386_ext_offset]; |
252b5132 RH |
305 | |
306 | case BFD_RELOC_8_PCREL: | |
307 | TRACE ("BFD_RELOC_8_PCREL"); | |
1b452ec6 | 308 | return &elf_howto_table[(unsigned int) R_386_PC8 - R_386_ext_offset]; |
252b5132 | 309 | |
13ae64f3 JJ |
310 | /* Common with Sun TLS implementation. */ |
311 | case BFD_RELOC_386_TLS_LDO_32: | |
312 | TRACE ("BFD_RELOC_386_TLS_LDO_32"); | |
313 | return &elf_howto_table[(unsigned int) R_386_TLS_LDO_32 - R_386_tls_offset]; | |
314 | ||
315 | case BFD_RELOC_386_TLS_IE_32: | |
316 | TRACE ("BFD_RELOC_386_TLS_IE_32"); | |
317 | return &elf_howto_table[(unsigned int) R_386_TLS_IE_32 - R_386_tls_offset]; | |
318 | ||
319 | case BFD_RELOC_386_TLS_LE_32: | |
320 | TRACE ("BFD_RELOC_386_TLS_LE_32"); | |
321 | return &elf_howto_table[(unsigned int) R_386_TLS_LE_32 - R_386_tls_offset]; | |
322 | ||
323 | case BFD_RELOC_386_TLS_DTPMOD32: | |
324 | TRACE ("BFD_RELOC_386_TLS_DTPMOD32"); | |
325 | return &elf_howto_table[(unsigned int) R_386_TLS_DTPMOD32 - R_386_tls_offset]; | |
326 | ||
327 | case BFD_RELOC_386_TLS_DTPOFF32: | |
328 | TRACE ("BFD_RELOC_386_TLS_DTPOFF32"); | |
329 | return &elf_howto_table[(unsigned int) R_386_TLS_DTPOFF32 - R_386_tls_offset]; | |
330 | ||
331 | case BFD_RELOC_386_TLS_TPOFF32: | |
332 | TRACE ("BFD_RELOC_386_TLS_TPOFF32"); | |
333 | return &elf_howto_table[(unsigned int) R_386_TLS_TPOFF32 - R_386_tls_offset]; | |
334 | ||
252b5132 RH |
335 | case BFD_RELOC_VTABLE_INHERIT: |
336 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
dc47f327 AM |
337 | return &elf_howto_table[(unsigned int) R_386_GNU_VTINHERIT |
338 | - R_386_vt_offset]; | |
252b5132 RH |
339 | |
340 | case BFD_RELOC_VTABLE_ENTRY: | |
341 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
dc47f327 AM |
342 | return &elf_howto_table[(unsigned int) R_386_GNU_VTENTRY |
343 | - R_386_vt_offset]; | |
252b5132 RH |
344 | |
345 | default: | |
346 | break; | |
347 | } | |
348 | ||
349 | TRACE ("Unknown"); | |
350 | return 0; | |
351 | } | |
352 | ||
353 | static void | |
354 | elf_i386_info_to_howto (abfd, cache_ptr, dst) | |
7442e600 ILT |
355 | bfd *abfd ATTRIBUTE_UNUSED; |
356 | arelent *cache_ptr ATTRIBUTE_UNUSED; | |
357 | Elf32_Internal_Rela *dst ATTRIBUTE_UNUSED; | |
252b5132 RH |
358 | { |
359 | abort (); | |
360 | } | |
361 | ||
362 | static void | |
363 | elf_i386_info_to_howto_rel (abfd, cache_ptr, dst) | |
7442e600 | 364 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
365 | arelent *cache_ptr; |
366 | Elf32_Internal_Rel *dst; | |
367 | { | |
dc47f327 AM |
368 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); |
369 | unsigned int indx; | |
370 | ||
371 | if ((indx = r_type) >= R_386_standard | |
372 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
373 | >= R_386_ext - R_386_standard) | |
13ae64f3 JJ |
374 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
375 | >= R_386_tls - R_386_ext) | |
376 | && ((indx = r_type - R_386_vt_offset) - R_386_tls | |
377 | >= R_386_vt - R_386_tls)) | |
252b5132 | 378 | { |
dc47f327 | 379 | (*_bfd_error_handler) (_("%s: invalid relocation type %d"), |
8f615d07 | 380 | bfd_archive_filename (abfd), (int) r_type); |
dc47f327 | 381 | indx = (unsigned int) R_386_NONE; |
252b5132 | 382 | } |
dc47f327 | 383 | cache_ptr->howto = &elf_howto_table[indx]; |
252b5132 RH |
384 | } |
385 | ||
386 | /* Return whether a symbol name implies a local label. The UnixWare | |
387 | 2.1 cc generates temporary symbols that start with .X, so we | |
388 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
389 | If so, we should move the .X recognition into | |
390 | _bfd_elf_is_local_label_name. */ | |
391 | ||
392 | static boolean | |
393 | elf_i386_is_local_label_name (abfd, name) | |
394 | bfd *abfd; | |
395 | const char *name; | |
396 | { | |
397 | if (name[0] == '.' && name[1] == 'X') | |
398 | return true; | |
399 | ||
400 | return _bfd_elf_is_local_label_name (abfd, name); | |
401 | } | |
402 | \f | |
38701953 AM |
403 | /* Support for core dump NOTE sections. */ |
404 | static boolean | |
405 | elf_i386_grok_prstatus (abfd, note) | |
406 | bfd *abfd; | |
407 | Elf_Internal_Note *note; | |
408 | { | |
409 | int offset; | |
410 | size_t raw_size; | |
411 | ||
412 | switch (note->descsz) | |
413 | { | |
414 | default: | |
415 | return false; | |
416 | ||
417 | case 144: /* Linux/i386 */ | |
418 | /* pr_cursig */ | |
419 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
420 | ||
421 | /* pr_pid */ | |
422 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
423 | ||
424 | /* pr_reg */ | |
425 | offset = 72; | |
426 | raw_size = 68; | |
427 | ||
428 | break; | |
429 | } | |
430 | ||
431 | /* Make a ".reg/999" section. */ | |
432 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
433 | raw_size, note->descpos + offset); | |
434 | } | |
435 | ||
436 | static boolean | |
437 | elf_i386_grok_psinfo (abfd, note) | |
438 | bfd *abfd; | |
439 | Elf_Internal_Note *note; | |
440 | { | |
441 | switch (note->descsz) | |
442 | { | |
443 | default: | |
444 | return false; | |
445 | ||
fd29389c | 446 | case 124: /* Linux/i386 elf_prpsinfo */ |
38701953 AM |
447 | elf_tdata (abfd)->core_program |
448 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); | |
449 | elf_tdata (abfd)->core_command | |
450 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); | |
451 | } | |
452 | ||
453 | /* Note that for some reason, a spurious space is tacked | |
454 | onto the end of the args in some (at least one anyway) | |
455 | implementations, so strip it off if it exists. */ | |
456 | ||
457 | { | |
458 | char *command = elf_tdata (abfd)->core_command; | |
459 | int n = strlen (command); | |
460 | ||
461 | if (0 < n && command[n - 1] == ' ') | |
462 | command[n - 1] = '\0'; | |
463 | } | |
464 | ||
465 | return true; | |
466 | } | |
467 | \f | |
468 | /* Functions for the i386 ELF linker. | |
469 | ||
470 | In order to gain some understanding of code in this file without | |
471 | knowing all the intricate details of the linker, note the | |
472 | following: | |
473 | ||
474 | Functions named elf_i386_* are called by external routines, other | |
475 | functions are only called locally. elf_i386_* functions appear | |
476 | in this file more or less in the order in which they are called | |
477 | from external routines. eg. elf_i386_check_relocs is called | |
478 | early in the link process, elf_i386_finish_dynamic_sections is | |
479 | one of the last functions. */ | |
480 | ||
252b5132 RH |
481 | |
482 | /* The name of the dynamic interpreter. This is put in the .interp | |
483 | section. */ | |
484 | ||
485 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
486 | ||
487 | /* The size in bytes of an entry in the procedure linkage table. */ | |
488 | ||
489 | #define PLT_ENTRY_SIZE 16 | |
490 | ||
491 | /* The first entry in an absolute procedure linkage table looks like | |
492 | this. See the SVR4 ABI i386 supplement to see how this works. */ | |
493 | ||
494 | static const bfd_byte elf_i386_plt0_entry[PLT_ENTRY_SIZE] = | |
495 | { | |
496 | 0xff, 0x35, /* pushl contents of address */ | |
497 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
498 | 0xff, 0x25, /* jmp indirect */ | |
499 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
500 | 0, 0, 0, 0 /* pad out to 16 bytes. */ | |
501 | }; | |
502 | ||
503 | /* Subsequent entries in an absolute procedure linkage table look like | |
504 | this. */ | |
505 | ||
506 | static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] = | |
507 | { | |
508 | 0xff, 0x25, /* jmp indirect */ | |
509 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
510 | 0x68, /* pushl immediate */ | |
511 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
512 | 0xe9, /* jmp relative */ | |
513 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
514 | }; | |
515 | ||
516 | /* The first entry in a PIC procedure linkage table look like this. */ | |
517 | ||
518 | static const bfd_byte elf_i386_pic_plt0_entry[PLT_ENTRY_SIZE] = | |
519 | { | |
520 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
521 | 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */ | |
522 | 0, 0, 0, 0 /* pad out to 16 bytes. */ | |
523 | }; | |
524 | ||
525 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
526 | ||
527 | static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] = | |
528 | { | |
529 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
530 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
531 | 0x68, /* pushl immediate */ | |
532 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
533 | 0xe9, /* jmp relative */ | |
534 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
535 | }; | |
536 | ||
537 | /* The i386 linker needs to keep track of the number of relocs that it | |
ffb2e45b AM |
538 | decides to copy as dynamic relocs in check_relocs for each symbol. |
539 | This is so that it can later discard them if they are found to be | |
540 | unnecessary. We store the information in a field extending the | |
541 | regular ELF linker hash table. */ | |
252b5132 | 542 | |
ffb2e45b | 543 | struct elf_i386_dyn_relocs |
252b5132 | 544 | { |
ffb2e45b | 545 | struct elf_i386_dyn_relocs *next; |
0c715baa AM |
546 | |
547 | /* The input section of the reloc. */ | |
548 | asection *sec; | |
549 | ||
550 | /* Total number of relocs copied for the input section. */ | |
252b5132 | 551 | bfd_size_type count; |
0c715baa AM |
552 | |
553 | /* Number of pc-relative relocs copied for the input section. */ | |
554 | bfd_size_type pc_count; | |
252b5132 RH |
555 | }; |
556 | ||
557 | /* i386 ELF linker hash entry. */ | |
558 | ||
559 | struct elf_i386_link_hash_entry | |
560 | { | |
ebe50bae | 561 | struct elf_link_hash_entry elf; |
252b5132 | 562 | |
0c715baa | 563 | /* Track dynamic relocs copied for this symbol. */ |
ffb2e45b | 564 | struct elf_i386_dyn_relocs *dyn_relocs; |
13ae64f3 JJ |
565 | |
566 | enum { | |
567 | GOT_UNKNOWN = 0, GOT_NORMAL, GOT_TLS_GD, GOT_TLS_IE | |
568 | } tls_type; | |
569 | }; | |
570 | ||
571 | #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent)) | |
572 | ||
573 | struct elf_i386_obj_tdata | |
574 | { | |
575 | struct elf_obj_tdata root; | |
576 | ||
577 | /* tls_type for each local got entry. */ | |
578 | char *local_got_tls_type; | |
252b5132 RH |
579 | }; |
580 | ||
13ae64f3 JJ |
581 | #define elf_i386_tdata(abfd) \ |
582 | ((struct elf_i386_obj_tdata *) (abfd)->tdata.any) | |
583 | ||
584 | #define elf_i386_local_got_tls_type(abfd) \ | |
585 | (elf_i386_tdata (abfd)->local_got_tls_type) | |
586 | ||
587 | static boolean | |
588 | elf_i386_mkobject (abfd) | |
589 | bfd *abfd; | |
590 | { | |
591 | bfd_size_type amt = sizeof (struct elf_i386_obj_tdata); | |
592 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
593 | if (abfd->tdata.any == NULL) | |
594 | return false; | |
595 | return true; | |
596 | } | |
cedb70c5 | 597 | |
13ae64f3 JJ |
598 | static boolean |
599 | elf_i386_object_p (abfd) | |
600 | bfd *abfd; | |
601 | { | |
602 | /* Allocate our special target data. */ | |
603 | struct elf_i386_obj_tdata *new_tdata; | |
604 | bfd_size_type amt = sizeof (struct elf_i386_obj_tdata); | |
605 | new_tdata = bfd_zalloc (abfd, amt); | |
606 | if (new_tdata == NULL) | |
607 | return false; | |
608 | new_tdata->root = *abfd->tdata.elf_obj_data; | |
609 | abfd->tdata.any = new_tdata; | |
610 | return true; | |
611 | } | |
612 | ||
252b5132 RH |
613 | /* i386 ELF linker hash table. */ |
614 | ||
615 | struct elf_i386_link_hash_table | |
616 | { | |
ebe50bae | 617 | struct elf_link_hash_table elf; |
252b5132 | 618 | |
6725bdbf AM |
619 | /* Short-cuts to get to dynamic linker sections. */ |
620 | asection *sgot; | |
621 | asection *sgotplt; | |
622 | asection *srelgot; | |
623 | asection *splt; | |
624 | asection *srelplt; | |
625 | asection *sdynbss; | |
626 | asection *srelbss; | |
ec338859 | 627 | |
13ae64f3 JJ |
628 | union { |
629 | bfd_signed_vma refcount; | |
630 | bfd_vma offset; | |
631 | } tls_ldm_got; | |
632 | ||
ec338859 AM |
633 | /* Small local sym to section mapping cache. */ |
634 | struct sym_sec_cache sym_sec; | |
6725bdbf | 635 | }; |
252b5132 RH |
636 | |
637 | /* Get the i386 ELF linker hash table from a link_info structure. */ | |
638 | ||
639 | #define elf_i386_hash_table(p) \ | |
640 | ((struct elf_i386_link_hash_table *) ((p)->hash)) | |
641 | ||
642 | /* Create an entry in an i386 ELF linker hash table. */ | |
643 | ||
644 | static struct bfd_hash_entry * | |
38701953 | 645 | link_hash_newfunc (entry, table, string) |
252b5132 RH |
646 | struct bfd_hash_entry *entry; |
647 | struct bfd_hash_table *table; | |
648 | const char *string; | |
649 | { | |
252b5132 RH |
650 | /* Allocate the structure if it has not already been allocated by a |
651 | subclass. */ | |
ebe50bae AM |
652 | if (entry == NULL) |
653 | { | |
654 | entry = bfd_hash_allocate (table, | |
655 | sizeof (struct elf_i386_link_hash_entry)); | |
656 | if (entry == NULL) | |
657 | return entry; | |
658 | } | |
252b5132 RH |
659 | |
660 | /* Call the allocation method of the superclass. */ | |
ebe50bae AM |
661 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
662 | if (entry != NULL) | |
252b5132 | 663 | { |
ebe50bae AM |
664 | struct elf_i386_link_hash_entry *eh; |
665 | ||
666 | eh = (struct elf_i386_link_hash_entry *) entry; | |
667 | eh->dyn_relocs = NULL; | |
13ae64f3 | 668 | eh->tls_type = GOT_UNKNOWN; |
252b5132 RH |
669 | } |
670 | ||
ebe50bae | 671 | return entry; |
252b5132 RH |
672 | } |
673 | ||
674 | /* Create an i386 ELF linker hash table. */ | |
675 | ||
676 | static struct bfd_link_hash_table * | |
677 | elf_i386_link_hash_table_create (abfd) | |
678 | bfd *abfd; | |
679 | { | |
680 | struct elf_i386_link_hash_table *ret; | |
dc810e39 | 681 | bfd_size_type amt = sizeof (struct elf_i386_link_hash_table); |
252b5132 | 682 | |
e2d34d7d | 683 | ret = (struct elf_i386_link_hash_table *) bfd_malloc (amt); |
ebe50bae | 684 | if (ret == NULL) |
252b5132 RH |
685 | return NULL; |
686 | ||
ebe50bae | 687 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
252b5132 | 688 | { |
e2d34d7d | 689 | free (ret); |
252b5132 RH |
690 | return NULL; |
691 | } | |
692 | ||
6725bdbf AM |
693 | ret->sgot = NULL; |
694 | ret->sgotplt = NULL; | |
695 | ret->srelgot = NULL; | |
696 | ret->splt = NULL; | |
697 | ret->srelplt = NULL; | |
698 | ret->sdynbss = NULL; | |
699 | ret->srelbss = NULL; | |
ec338859 | 700 | ret->sym_sec.abfd = NULL; |
6725bdbf | 701 | |
ebe50bae | 702 | return &ret->elf.root; |
252b5132 RH |
703 | } |
704 | ||
6725bdbf AM |
705 | /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up |
706 | shortcuts to them in our hash table. */ | |
707 | ||
708 | static boolean | |
709 | create_got_section (dynobj, info) | |
710 | bfd *dynobj; | |
711 | struct bfd_link_info *info; | |
712 | { | |
713 | struct elf_i386_link_hash_table *htab; | |
714 | ||
715 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
716 | return false; | |
717 | ||
718 | htab = elf_i386_hash_table (info); | |
719 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
720 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
721 | if (!htab->sgot || !htab->sgotplt) | |
722 | abort (); | |
723 | ||
724 | htab->srelgot = bfd_make_section (dynobj, ".rel.got"); | |
725 | if (htab->srelgot == NULL | |
726 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
727 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
728 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
729 | | SEC_READONLY)) | |
730 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) | |
731 | return false; | |
732 | return true; | |
733 | } | |
734 | ||
735 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and | |
736 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
737 | hash table. */ | |
738 | ||
739 | static boolean | |
740 | elf_i386_create_dynamic_sections (dynobj, info) | |
741 | bfd *dynobj; | |
742 | struct bfd_link_info *info; | |
743 | { | |
744 | struct elf_i386_link_hash_table *htab; | |
745 | ||
746 | htab = elf_i386_hash_table (info); | |
747 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
748 | return false; | |
749 | ||
750 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
751 | return false; | |
752 | ||
753 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
754 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
755 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
756 | if (!info->shared) | |
757 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
758 | ||
759 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
760 | || (!info->shared && !htab->srelbss)) | |
761 | abort (); | |
762 | ||
763 | return true; | |
764 | } | |
765 | ||
ebe50bae AM |
766 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
767 | ||
51b64d56 | 768 | static void |
ebe50bae AM |
769 | elf_i386_copy_indirect_symbol (dir, ind) |
770 | struct elf_link_hash_entry *dir, *ind; | |
771 | { | |
772 | struct elf_i386_link_hash_entry *edir, *eind; | |
773 | ||
774 | edir = (struct elf_i386_link_hash_entry *) dir; | |
775 | eind = (struct elf_i386_link_hash_entry *) ind; | |
776 | ||
bbd7ec4a | 777 | if (eind->dyn_relocs != NULL) |
ebe50bae | 778 | { |
bbd7ec4a AM |
779 | if (edir->dyn_relocs != NULL) |
780 | { | |
781 | struct elf_i386_dyn_relocs **pp; | |
782 | struct elf_i386_dyn_relocs *p; | |
783 | ||
1e370bd2 | 784 | if (ind->root.type == bfd_link_hash_indirect) |
bbd7ec4a AM |
785 | abort (); |
786 | ||
787 | /* Add reloc counts against the weak sym to the strong sym | |
788 | list. Merge any entries against the same section. */ | |
789 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
790 | { | |
791 | struct elf_i386_dyn_relocs *q; | |
792 | ||
793 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
794 | if (q->sec == p->sec) | |
795 | { | |
796 | q->pc_count += p->pc_count; | |
797 | q->count += p->count; | |
798 | *pp = p->next; | |
799 | break; | |
800 | } | |
801 | if (q == NULL) | |
802 | pp = &p->next; | |
803 | } | |
804 | *pp = edir->dyn_relocs; | |
805 | } | |
806 | ||
ebe50bae AM |
807 | edir->dyn_relocs = eind->dyn_relocs; |
808 | eind->dyn_relocs = NULL; | |
809 | } | |
ebe50bae AM |
810 | |
811 | _bfd_elf_link_hash_copy_indirect (dir, ind); | |
812 | } | |
813 | ||
13ae64f3 JJ |
814 | static int |
815 | elf_i386_tls_transition (info, r_type, is_local) | |
816 | struct bfd_link_info *info; | |
817 | int r_type; | |
818 | int is_local; | |
819 | { | |
820 | if (info->shared) | |
821 | return r_type; | |
822 | ||
823 | switch (r_type) | |
824 | { | |
825 | case R_386_TLS_GD: | |
826 | case R_386_TLS_IE_32: | |
827 | if (is_local) | |
828 | return R_386_TLS_LE_32; | |
829 | return R_386_TLS_IE_32; | |
830 | case R_386_TLS_LDM: | |
831 | return R_386_TLS_LE_32; | |
832 | } | |
833 | ||
834 | return r_type; | |
835 | } | |
836 | ||
252b5132 | 837 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
838 | calculate needed space in the global offset table, procedure linkage |
839 | table, and dynamic reloc sections. */ | |
252b5132 RH |
840 | |
841 | static boolean | |
842 | elf_i386_check_relocs (abfd, info, sec, relocs) | |
843 | bfd *abfd; | |
844 | struct bfd_link_info *info; | |
845 | asection *sec; | |
846 | const Elf_Internal_Rela *relocs; | |
847 | { | |
6725bdbf | 848 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
849 | Elf_Internal_Shdr *symtab_hdr; |
850 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
851 | const Elf_Internal_Rela *rel; |
852 | const Elf_Internal_Rela *rel_end; | |
252b5132 RH |
853 | asection *sreloc; |
854 | ||
855 | if (info->relocateable) | |
856 | return true; | |
857 | ||
6725bdbf | 858 | htab = elf_i386_hash_table (info); |
252b5132 RH |
859 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
860 | sym_hashes = elf_sym_hashes (abfd); | |
252b5132 | 861 | |
252b5132 RH |
862 | sreloc = NULL; |
863 | ||
864 | rel_end = relocs + sec->reloc_count; | |
865 | for (rel = relocs; rel < rel_end; rel++) | |
866 | { | |
13ae64f3 | 867 | unsigned int r_type; |
252b5132 RH |
868 | unsigned long r_symndx; |
869 | struct elf_link_hash_entry *h; | |
870 | ||
871 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 872 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 873 | |
d9bc7a44 | 874 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 875 | { |
8f615d07 AM |
876 | (*_bfd_error_handler) (_("%s: bad symbol index: %d"), |
877 | bfd_archive_filename (abfd), | |
878 | r_symndx); | |
f5f31454 L |
879 | return false; |
880 | } | |
881 | ||
252b5132 RH |
882 | if (r_symndx < symtab_hdr->sh_info) |
883 | h = NULL; | |
884 | else | |
885 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
886 | ||
13ae64f3 JJ |
887 | r_type = elf_i386_tls_transition (info, r_type, h == NULL); |
888 | ||
889 | switch (r_type) | |
252b5132 | 890 | { |
13ae64f3 JJ |
891 | case R_386_TLS_IE_32: |
892 | if (info->shared) | |
893 | info->flags |= DF_STATIC_TLS; | |
894 | /* FALLTHROUGH */ | |
252b5132 | 895 | case R_386_GOT32: |
13ae64f3 | 896 | case R_386_TLS_GD: |
252b5132 | 897 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
898 | { |
899 | int tls_type, old_tls_type; | |
900 | ||
901 | switch (r_type) | |
902 | { | |
903 | default: | |
904 | case R_386_GOT32: tls_type = GOT_NORMAL; break; | |
905 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; | |
906 | case R_386_TLS_IE_32: tls_type = GOT_TLS_IE; break; | |
907 | } | |
908 | ||
909 | if (h != NULL) | |
910 | { | |
911 | h->got.refcount += 1; | |
912 | old_tls_type = elf_i386_hash_entry(h)->tls_type; | |
913 | } | |
914 | else | |
915 | { | |
916 | bfd_signed_vma *local_got_refcounts; | |
917 | ||
918 | /* This is a global offset table entry for a local symbol. */ | |
919 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
920 | if (local_got_refcounts == NULL) | |
921 | { | |
922 | bfd_size_type size; | |
923 | ||
924 | size = symtab_hdr->sh_info; | |
925 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); | |
926 | local_got_refcounts = ((bfd_signed_vma *) | |
927 | bfd_zalloc (abfd, size)); | |
928 | if (local_got_refcounts == NULL) | |
929 | return false; | |
930 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
931 | elf_i386_local_got_tls_type (abfd) | |
932 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
933 | } | |
934 | local_got_refcounts[r_symndx] += 1; | |
935 | old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx]; | |
936 | } | |
937 | ||
938 | /* If a TLS symbol is accessed using IE at least once, | |
939 | there is no point to use dynamic model for it. */ | |
940 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
941 | && (old_tls_type != GOT_TLS_GD || tls_type != GOT_TLS_IE)) | |
942 | { | |
943 | if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD) | |
944 | tls_type = GOT_TLS_IE; | |
945 | else | |
946 | { | |
947 | (*_bfd_error_handler) | |
948 | (_("%s: `%s' accessed both as normal and thread local symbol"), | |
949 | bfd_archive_filename (abfd), h->root.root.string); | |
252b5132 | 950 | return false; |
13ae64f3 JJ |
951 | } |
952 | } | |
953 | ||
954 | if (old_tls_type != tls_type) | |
955 | { | |
956 | if (h != NULL) | |
957 | elf_i386_hash_entry (h)->tls_type = tls_type; | |
958 | else | |
959 | elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
960 | } | |
961 | } | |
0ac8d2ca AM |
962 | /* Fall through */ |
963 | ||
964 | case R_386_GOTOFF: | |
965 | case R_386_GOTPC: | |
13ae64f3 | 966 | create_got: |
0ac8d2ca AM |
967 | if (htab->sgot == NULL) |
968 | { | |
969 | if (htab->elf.dynobj == NULL) | |
970 | htab->elf.dynobj = abfd; | |
971 | if (!create_got_section (htab->elf.dynobj, info)) | |
972 | return false; | |
973 | } | |
252b5132 RH |
974 | break; |
975 | ||
13ae64f3 JJ |
976 | case R_386_TLS_LDM: |
977 | htab->tls_ldm_got.refcount += 1; | |
978 | goto create_got; | |
979 | ||
252b5132 RH |
980 | case R_386_PLT32: |
981 | /* This symbol requires a procedure linkage table entry. We | |
83be169b AM |
982 | actually build the entry in adjust_dynamic_symbol, |
983 | because this might be a case of linking PIC code which is | |
984 | never referenced by a dynamic object, in which case we | |
985 | don't need to generate a procedure linkage table entry | |
986 | after all. */ | |
252b5132 RH |
987 | |
988 | /* If this is a local symbol, we resolve it directly without | |
83be169b | 989 | creating a procedure linkage table entry. */ |
252b5132 RH |
990 | if (h == NULL) |
991 | continue; | |
992 | ||
51b64d56 AM |
993 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
994 | h->plt.refcount += 1; | |
252b5132 RH |
995 | break; |
996 | ||
997 | case R_386_32: | |
998 | case R_386_PC32: | |
12d0ee4a | 999 | if (h != NULL && !info->shared) |
6725bdbf | 1000 | { |
12d0ee4a | 1001 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
1002 | need a copy reloc. We can't check reliably at this |
1003 | stage whether the section is read-only, as input | |
1004 | sections have not yet been mapped to output sections. | |
1005 | Tentatively set the flag for now, and correct in | |
1006 | adjust_dynamic_symbol. */ | |
1007 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
12d0ee4a AM |
1008 | |
1009 | /* We may need a .plt entry if the function this reloc | |
1010 | refers to is in a shared lib. */ | |
51b64d56 | 1011 | h->plt.refcount += 1; |
6725bdbf | 1012 | } |
7843f00e | 1013 | |
252b5132 | 1014 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
1015 | against a global symbol, or a non PC relative reloc |
1016 | against a local symbol, then we need to copy the reloc | |
1017 | into the shared library. However, if we are linking with | |
1018 | -Bsymbolic, we do not need to copy a reloc against a | |
1019 | global symbol which is defined in an object we are | |
1020 | including in the link (i.e., DEF_REGULAR is set). At | |
1021 | this point we have not seen all the input files, so it is | |
1022 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
1023 | later (it is never cleared). In case of a weak definition, |
1024 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 1025 | a shared library. We account for that possibility below by |
1f655a09 L |
1026 | storing information in the relocs_copied field of the hash |
1027 | table entry. A similar situation occurs when creating | |
1028 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 1029 | symbol local. |
56882138 | 1030 | |
12d0ee4a AM |
1031 | If on the other hand, we are creating an executable, we |
1032 | may need to keep relocations for symbols satisfied by a | |
1033 | dynamic library if we manage to avoid copy relocs for the | |
1034 | symbol. */ | |
1035 | if ((info->shared | |
1036 | && (sec->flags & SEC_ALLOC) != 0 | |
13ae64f3 | 1037 | && (r_type != R_386_PC32 |
12d0ee4a AM |
1038 | || (h != NULL |
1039 | && (! info->symbolic | |
1040 | || h->root.type == bfd_link_hash_defweak | |
1041 | || (h->elf_link_hash_flags | |
1042 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
1043 | || (!info->shared | |
1044 | && (sec->flags & SEC_ALLOC) != 0 | |
1045 | && h != NULL | |
12d0ee4a AM |
1046 | && (h->root.type == bfd_link_hash_defweak |
1047 | || (h->elf_link_hash_flags | |
1048 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
252b5132 | 1049 | { |
ec338859 AM |
1050 | struct elf_i386_dyn_relocs *p; |
1051 | struct elf_i386_dyn_relocs **head; | |
1052 | ||
12d0ee4a AM |
1053 | /* We must copy these reloc types into the output file. |
1054 | Create a reloc section in dynobj and make room for | |
1055 | this reloc. */ | |
252b5132 RH |
1056 | if (sreloc == NULL) |
1057 | { | |
1058 | const char *name; | |
0ac8d2ca | 1059 | bfd *dynobj; |
e92d460e AM |
1060 | unsigned int strndx = elf_elfheader (abfd)->e_shstrndx; |
1061 | unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name; | |
252b5132 | 1062 | |
e92d460e | 1063 | name = bfd_elf_string_from_elf_section (abfd, strndx, shnam); |
252b5132 RH |
1064 | if (name == NULL) |
1065 | return false; | |
1066 | ||
c8492176 L |
1067 | if (strncmp (name, ".rel", 4) != 0 |
1068 | || strcmp (bfd_get_section_name (abfd, sec), | |
1069 | name + 4) != 0) | |
1070 | { | |
0c715baa AM |
1071 | (*_bfd_error_handler) |
1072 | (_("%s: bad relocation section name `%s\'"), | |
1073 | bfd_archive_filename (abfd), name); | |
f5f31454 | 1074 | } |
252b5132 | 1075 | |
0ac8d2ca AM |
1076 | if (htab->elf.dynobj == NULL) |
1077 | htab->elf.dynobj = abfd; | |
1078 | ||
1079 | dynobj = htab->elf.dynobj; | |
252b5132 RH |
1080 | sreloc = bfd_get_section_by_name (dynobj, name); |
1081 | if (sreloc == NULL) | |
1082 | { | |
1083 | flagword flags; | |
1084 | ||
1085 | sreloc = bfd_make_section (dynobj, name); | |
1086 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
1087 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1088 | if ((sec->flags & SEC_ALLOC) != 0) | |
1089 | flags |= SEC_ALLOC | SEC_LOAD; | |
1090 | if (sreloc == NULL | |
1091 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
1092 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
1093 | return false; | |
1094 | } | |
0c715baa | 1095 | elf_section_data (sec)->sreloc = sreloc; |
252b5132 RH |
1096 | } |
1097 | ||
0c715baa AM |
1098 | /* If this is a global symbol, we count the number of |
1099 | relocations we need for this symbol. */ | |
1100 | if (h != NULL) | |
252b5132 | 1101 | { |
ec338859 | 1102 | head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs; |
0c715baa AM |
1103 | } |
1104 | else | |
1105 | { | |
ec338859 AM |
1106 | /* Track dynamic relocs needed for local syms too. |
1107 | We really need local syms available to do this | |
1108 | easily. Oh well. */ | |
1109 | ||
1110 | asection *s; | |
1111 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
1112 | sec, r_symndx); | |
1113 | if (s == NULL) | |
1114 | return false; | |
1115 | ||
1116 | head = ((struct elf_i386_dyn_relocs **) | |
1117 | &elf_section_data (s)->local_dynrel); | |
1118 | } | |
1119 | ||
1120 | p = *head; | |
1121 | if (p == NULL || p->sec != sec) | |
1122 | { | |
1123 | bfd_size_type amt = sizeof *p; | |
1124 | p = ((struct elf_i386_dyn_relocs *) | |
1125 | bfd_alloc (htab->elf.dynobj, amt)); | |
1126 | if (p == NULL) | |
1127 | return false; | |
1128 | p->next = *head; | |
1129 | *head = p; | |
1130 | p->sec = sec; | |
1131 | p->count = 0; | |
1132 | p->pc_count = 0; | |
252b5132 | 1133 | } |
ec338859 AM |
1134 | |
1135 | p->count += 1; | |
13ae64f3 | 1136 | if (r_type == R_386_PC32) |
ec338859 | 1137 | p->pc_count += 1; |
252b5132 | 1138 | } |
252b5132 RH |
1139 | break; |
1140 | ||
1141 | /* This relocation describes the C++ object vtable hierarchy. | |
1142 | Reconstruct it for later use during GC. */ | |
1143 | case R_386_GNU_VTINHERIT: | |
1144 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
1145 | return false; | |
1146 | break; | |
1147 | ||
1148 | /* This relocation describes which C++ vtable entries are actually | |
1149 | used. Record for later use during GC. */ | |
1150 | case R_386_GNU_VTENTRY: | |
1151 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
1152 | return false; | |
1153 | break; | |
1154 | ||
13ae64f3 JJ |
1155 | case R_386_TLS_LE_32: |
1156 | case R_386_TLS_LE: | |
1157 | if (info->shared) | |
1158 | { | |
1159 | (*_bfd_error_handler) (_("%s: TLS local exec code cannot be linked into shared objects"), | |
1160 | bfd_archive_filename (abfd)); | |
1161 | return false; | |
1162 | } | |
1163 | break; | |
1164 | ||
252b5132 RH |
1165 | default: |
1166 | break; | |
1167 | } | |
1168 | } | |
1169 | ||
1170 | return true; | |
1171 | } | |
1172 | ||
1173 | /* Return the section that should be marked against GC for a given | |
1174 | relocation. */ | |
1175 | ||
1176 | static asection * | |
1e2f5b6e AM |
1177 | elf_i386_gc_mark_hook (sec, info, rel, h, sym) |
1178 | asection *sec; | |
7442e600 | 1179 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1180 | Elf_Internal_Rela *rel; |
1181 | struct elf_link_hash_entry *h; | |
1182 | Elf_Internal_Sym *sym; | |
1183 | { | |
1184 | if (h != NULL) | |
1185 | { | |
1186 | switch (ELF32_R_TYPE (rel->r_info)) | |
1187 | { | |
1188 | case R_386_GNU_VTINHERIT: | |
1189 | case R_386_GNU_VTENTRY: | |
1190 | break; | |
1191 | ||
1192 | default: | |
1193 | switch (h->root.type) | |
1194 | { | |
1195 | case bfd_link_hash_defined: | |
1196 | case bfd_link_hash_defweak: | |
1197 | return h->root.u.def.section; | |
1198 | ||
1199 | case bfd_link_hash_common: | |
1200 | return h->root.u.c.p->section; | |
1201 | ||
1202 | default: | |
1203 | break; | |
1204 | } | |
1205 | } | |
1206 | } | |
1207 | else | |
1e2f5b6e | 1208 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
252b5132 RH |
1209 | |
1210 | return NULL; | |
1211 | } | |
1212 | ||
1213 | /* Update the got entry reference counts for the section being removed. */ | |
1214 | ||
1215 | static boolean | |
1216 | elf_i386_gc_sweep_hook (abfd, info, sec, relocs) | |
dd5724d5 | 1217 | bfd *abfd; |
6725bdbf | 1218 | struct bfd_link_info *info; |
dd5724d5 AM |
1219 | asection *sec; |
1220 | const Elf_Internal_Rela *relocs; | |
252b5132 | 1221 | { |
dd5724d5 AM |
1222 | Elf_Internal_Shdr *symtab_hdr; |
1223 | struct elf_link_hash_entry **sym_hashes; | |
1224 | bfd_signed_vma *local_got_refcounts; | |
1225 | const Elf_Internal_Rela *rel, *relend; | |
1226 | unsigned long r_symndx; | |
1227 | struct elf_link_hash_entry *h; | |
dd5724d5 | 1228 | |
ec338859 | 1229 | elf_section_data (sec)->local_dynrel = NULL; |
dd5724d5 | 1230 | |
6725bdbf AM |
1231 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1232 | sym_hashes = elf_sym_hashes (abfd); | |
1233 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
dd5724d5 AM |
1234 | |
1235 | relend = relocs + sec->reloc_count; | |
1236 | for (rel = relocs; rel < relend; rel++) | |
13ae64f3 JJ |
1237 | switch (elf_i386_tls_transition (info, ELF32_R_TYPE (rel->r_info), |
1238 | ELF32_R_SYM (rel->r_info) | |
1239 | >= symtab_hdr->sh_info)) | |
dd5724d5 | 1240 | { |
13ae64f3 JJ |
1241 | case R_386_TLS_LDM: |
1242 | if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0) | |
1243 | elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1; | |
1244 | break; | |
1245 | ||
1246 | case R_386_TLS_GD: | |
1247 | case R_386_TLS_IE_32: | |
dd5724d5 | 1248 | case R_386_GOT32: |
dd5724d5 AM |
1249 | r_symndx = ELF32_R_SYM (rel->r_info); |
1250 | if (r_symndx >= symtab_hdr->sh_info) | |
1251 | { | |
1252 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1253 | if (h->got.refcount > 0) | |
6725bdbf | 1254 | h->got.refcount -= 1; |
dd5724d5 AM |
1255 | } |
1256 | else if (local_got_refcounts != NULL) | |
1257 | { | |
1258 | if (local_got_refcounts[r_symndx] > 0) | |
6725bdbf | 1259 | local_got_refcounts[r_symndx] -= 1; |
dd5724d5 AM |
1260 | } |
1261 | break; | |
1262 | ||
6725bdbf AM |
1263 | case R_386_32: |
1264 | case R_386_PC32: | |
0c715baa AM |
1265 | r_symndx = ELF32_R_SYM (rel->r_info); |
1266 | if (r_symndx >= symtab_hdr->sh_info) | |
1267 | { | |
1268 | struct elf_i386_link_hash_entry *eh; | |
1269 | struct elf_i386_dyn_relocs **pp; | |
1270 | struct elf_i386_dyn_relocs *p; | |
1271 | ||
1272 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1273 | ||
1274 | if (!info->shared && h->plt.refcount > 0) | |
1275 | h->plt.refcount -= 1; | |
1276 | ||
1277 | eh = (struct elf_i386_link_hash_entry *) h; | |
1278 | ||
1279 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
1280 | if (p->sec == sec) | |
1281 | { | |
1282 | if (ELF32_R_TYPE (rel->r_info) == R_386_PC32) | |
1283 | p->pc_count -= 1; | |
1284 | p->count -= 1; | |
1285 | if (p->count == 0) | |
1286 | *pp = p->next; | |
1287 | break; | |
1288 | } | |
1289 | } | |
1290 | break; | |
6725bdbf | 1291 | |
dd5724d5 AM |
1292 | case R_386_PLT32: |
1293 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1294 | if (r_symndx >= symtab_hdr->sh_info) | |
1295 | { | |
1296 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1297 | if (h->plt.refcount > 0) | |
1298 | h->plt.refcount -= 1; | |
1299 | } | |
1300 | break; | |
1301 | ||
1302 | default: | |
1303 | break; | |
1304 | } | |
252b5132 RH |
1305 | |
1306 | return true; | |
1307 | } | |
1308 | ||
1309 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1310 | regular object. The current definition is in some section of the | |
1311 | dynamic object, but we're not including those sections. We have to | |
1312 | change the definition to something the rest of the link can | |
1313 | understand. */ | |
1314 | ||
1315 | static boolean | |
1316 | elf_i386_adjust_dynamic_symbol (info, h) | |
1317 | struct bfd_link_info *info; | |
1318 | struct elf_link_hash_entry *h; | |
1319 | { | |
6725bdbf | 1320 | struct elf_i386_link_hash_table *htab; |
ebe50bae AM |
1321 | struct elf_i386_link_hash_entry * eh; |
1322 | struct elf_i386_dyn_relocs *p; | |
252b5132 RH |
1323 | asection *s; |
1324 | unsigned int power_of_two; | |
1325 | ||
252b5132 RH |
1326 | /* If this is a function, put it in the procedure linkage table. We |
1327 | will fill in the contents of the procedure linkage table later, | |
1328 | when we know the address of the .got section. */ | |
1329 | if (h->type == STT_FUNC | |
1330 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
1331 | { | |
6725bdbf AM |
1332 | if (h->plt.refcount <= 0 |
1333 | || (! info->shared | |
1334 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
f9cd9119 MS |
1335 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 |
1336 | && h->root.type != bfd_link_hash_undefweak | |
1337 | && h->root.type != bfd_link_hash_undefined)) | |
252b5132 RH |
1338 | { |
1339 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
1340 | file, but the symbol was never referred to by a dynamic |
1341 | object, or if all references were garbage collected. In | |
1342 | such a case, we don't actually need to build a procedure | |
1343 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 1344 | h->plt.offset = (bfd_vma) -1; |
dd5724d5 | 1345 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
252b5132 RH |
1346 | } |
1347 | ||
252b5132 RH |
1348 | return true; |
1349 | } | |
6725bdbf AM |
1350 | else |
1351 | /* It's possible that we incorrectly decided a .plt reloc was | |
1352 | needed for an R_386_PC32 reloc to a non-function sym in | |
1353 | check_relocs. We can't decide accurately between function and | |
1354 | non-function syms in check-relocs; Objects loaded later in | |
1355 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1356 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
1357 | |
1358 | /* If this is a weak symbol, and there is a real definition, the | |
1359 | processor independent code will have arranged for us to see the | |
1360 | real definition first, and we can just use the same value. */ | |
1361 | if (h->weakdef != NULL) | |
1362 | { | |
1363 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1364 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1365 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1366 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
0a991dfe | 1367 | return true; |
252b5132 RH |
1368 | } |
1369 | ||
1370 | /* This is a reference to a symbol defined by a dynamic object which | |
1371 | is not a function. */ | |
1372 | ||
1373 | /* If we are creating a shared library, we must presume that the | |
1374 | only references to the symbol are via the global offset table. | |
1375 | For such cases we need not do anything here; the relocations will | |
1376 | be handled correctly by relocate_section. */ | |
1377 | if (info->shared) | |
1378 | return true; | |
1379 | ||
7843f00e ILT |
1380 | /* If there are no references to this symbol that do not use the |
1381 | GOT, we don't need to generate a copy reloc. */ | |
1382 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
1383 | return true; | |
1384 | ||
8bd621d8 AM |
1385 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1386 | if (info->nocopyreloc) | |
1387 | { | |
1388 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
1389 | return true; | |
1390 | } | |
1391 | ||
ebe50bae AM |
1392 | eh = (struct elf_i386_link_hash_entry *) h; |
1393 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1394 | { | |
1395 | s = p->sec->output_section; | |
1396 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1397 | break; | |
1398 | } | |
1399 | ||
1400 | /* If we didn't find any dynamic relocs in read-only sections, then | |
cedb70c5 | 1401 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
ebe50bae AM |
1402 | if (p == NULL) |
1403 | { | |
1404 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
1405 | return true; | |
1406 | } | |
1407 | ||
252b5132 RH |
1408 | /* We must allocate the symbol in our .dynbss section, which will |
1409 | become part of the .bss section of the executable. There will be | |
1410 | an entry for this symbol in the .dynsym section. The dynamic | |
1411 | object will contain position independent code, so all references | |
1412 | from the dynamic object to this symbol will go through the global | |
1413 | offset table. The dynamic linker will use the .dynsym entry to | |
1414 | determine the address it must put in the global offset table, so | |
1415 | both the dynamic object and the regular object will refer to the | |
1416 | same memory location for the variable. */ | |
1417 | ||
0ac8d2ca | 1418 | htab = elf_i386_hash_table (info); |
252b5132 RH |
1419 | |
1420 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to | |
1421 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 1422 | runtime process image. */ |
252b5132 RH |
1423 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1424 | { | |
0ac8d2ca | 1425 | htab->srelbss->_raw_size += sizeof (Elf32_External_Rel); |
252b5132 RH |
1426 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
1427 | } | |
1428 | ||
1429 | /* We need to figure out the alignment required for this symbol. I | |
1430 | have no idea how ELF linkers handle this. */ | |
1431 | power_of_two = bfd_log2 (h->size); | |
1432 | if (power_of_two > 3) | |
1433 | power_of_two = 3; | |
1434 | ||
1435 | /* Apply the required alignment. */ | |
0ac8d2ca AM |
1436 | s = htab->sdynbss; |
1437 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); | |
1438 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) | |
252b5132 | 1439 | { |
0ac8d2ca | 1440 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
252b5132 RH |
1441 | return false; |
1442 | } | |
1443 | ||
1444 | /* Define the symbol as being at this point in the section. */ | |
1445 | h->root.u.def.section = s; | |
1446 | h->root.u.def.value = s->_raw_size; | |
1447 | ||
1448 | /* Increment the section size to make room for the symbol. */ | |
1449 | s->_raw_size += h->size; | |
1450 | ||
1451 | return true; | |
1452 | } | |
1453 | ||
6725bdbf AM |
1454 | /* This is the condition under which elf_i386_finish_dynamic_symbol |
1455 | will be called from elflink.h. If elflink.h doesn't call our | |
1456 | finish_dynamic_symbol routine, we'll need to do something about | |
1457 | initializing any .plt and .got entries in elf_i386_relocate_section. */ | |
1458 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ | |
1459 | ((DYN) \ | |
1460 | && ((INFO)->shared \ | |
1461 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ | |
1462 | && ((H)->dynindx != -1 \ | |
1463 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
1464 | ||
1465 | /* Allocate space in .plt, .got and associated reloc sections for | |
0c715baa | 1466 | dynamic relocs. */ |
6725bdbf AM |
1467 | |
1468 | static boolean | |
0c715baa | 1469 | allocate_dynrelocs (h, inf) |
6725bdbf AM |
1470 | struct elf_link_hash_entry *h; |
1471 | PTR inf; | |
1472 | { | |
1473 | struct bfd_link_info *info; | |
1474 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 1475 | struct elf_i386_link_hash_entry *eh; |
0c715baa | 1476 | struct elf_i386_dyn_relocs *p; |
6725bdbf | 1477 | |
e92d460e | 1478 | if (h->root.type == bfd_link_hash_indirect) |
6725bdbf AM |
1479 | return true; |
1480 | ||
e92d460e AM |
1481 | if (h->root.type == bfd_link_hash_warning) |
1482 | /* When warning symbols are created, they **replace** the "real" | |
1483 | entry in the hash table, thus we never get to see the real | |
1484 | symbol in a hash traversal. So look at it now. */ | |
1485 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1486 | ||
6725bdbf AM |
1487 | info = (struct bfd_link_info *) inf; |
1488 | htab = elf_i386_hash_table (info); | |
1489 | ||
ebe50bae | 1490 | if (htab->elf.dynamic_sections_created |
6725bdbf AM |
1491 | && h->plt.refcount > 0) |
1492 | { | |
5a15f56f AM |
1493 | /* Make sure this symbol is output as a dynamic symbol. |
1494 | Undefined weak syms won't yet be marked as dynamic. */ | |
1495 | if (h->dynindx == -1 | |
1496 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1497 | { | |
1498 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
1499 | return false; | |
1500 | } | |
1501 | ||
ced53ee5 AM |
1502 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) |
1503 | { | |
0ac8d2ca | 1504 | asection *s = htab->splt; |
6725bdbf | 1505 | |
ced53ee5 AM |
1506 | /* If this is the first .plt entry, make room for the special |
1507 | first entry. */ | |
1508 | if (s->_raw_size == 0) | |
1509 | s->_raw_size += PLT_ENTRY_SIZE; | |
6725bdbf | 1510 | |
ced53ee5 | 1511 | h->plt.offset = s->_raw_size; |
6725bdbf | 1512 | |
ced53ee5 AM |
1513 | /* If this symbol is not defined in a regular file, and we are |
1514 | not generating a shared library, then set the symbol to this | |
1515 | location in the .plt. This is required to make function | |
1516 | pointers compare as equal between the normal executable and | |
1517 | the shared library. */ | |
1518 | if (! info->shared | |
1519 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1520 | { | |
1521 | h->root.u.def.section = s; | |
1522 | h->root.u.def.value = h->plt.offset; | |
1523 | } | |
6725bdbf | 1524 | |
ced53ee5 AM |
1525 | /* Make room for this entry. */ |
1526 | s->_raw_size += PLT_ENTRY_SIZE; | |
6725bdbf | 1527 | |
ced53ee5 AM |
1528 | /* We also need to make an entry in the .got.plt section, which |
1529 | will be placed in the .got section by the linker script. */ | |
0ac8d2ca | 1530 | htab->sgotplt->_raw_size += 4; |
6725bdbf | 1531 | |
6725bdbf | 1532 | /* We also need to make an entry in the .rel.plt section. */ |
0ac8d2ca | 1533 | htab->srelplt->_raw_size += sizeof (Elf32_External_Rel); |
6725bdbf | 1534 | } |
ced53ee5 AM |
1535 | else |
1536 | { | |
51b64d56 | 1537 | h->plt.offset = (bfd_vma) -1; |
ced53ee5 AM |
1538 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
1539 | } | |
6725bdbf AM |
1540 | } |
1541 | else | |
1542 | { | |
51b64d56 | 1543 | h->plt.offset = (bfd_vma) -1; |
6725bdbf AM |
1544 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
1545 | } | |
1546 | ||
13ae64f3 JJ |
1547 | /* If R_386_TLS_IE_32 symbol is now local to the binary, |
1548 | make it a R_386_TLS_LE_32 requiring no TLS entry. */ | |
1549 | if (h->got.refcount > 0 | |
1550 | && !info->shared | |
1551 | && h->dynindx == -1 | |
1552 | && elf_i386_hash_entry(h)->tls_type == GOT_TLS_IE) | |
cedb70c5 | 1553 | h->got.offset = (bfd_vma) -1; |
13ae64f3 | 1554 | else if (h->got.refcount > 0) |
6725bdbf | 1555 | { |
0ac8d2ca | 1556 | asection *s; |
6725bdbf | 1557 | boolean dyn; |
13ae64f3 | 1558 | int tls_type = elf_i386_hash_entry(h)->tls_type; |
6725bdbf | 1559 | |
5a15f56f AM |
1560 | /* Make sure this symbol is output as a dynamic symbol. |
1561 | Undefined weak syms won't yet be marked as dynamic. */ | |
1562 | if (h->dynindx == -1 | |
1563 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1564 | { | |
1565 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
1566 | return false; | |
1567 | } | |
1568 | ||
6725bdbf AM |
1569 | s = htab->sgot; |
1570 | h->got.offset = s->_raw_size; | |
1571 | s->_raw_size += 4; | |
13ae64f3 JJ |
1572 | /* R_386_TLS_GD needs 2 consecutive GOT slots. */ |
1573 | if (tls_type == GOT_TLS_GD) | |
1574 | s->_raw_size += 4; | |
ebe50bae | 1575 | dyn = htab->elf.dynamic_sections_created; |
13ae64f3 JJ |
1576 | /* R_386_TLS_IE_32 needs one dynamic relocation, |
1577 | R_386_TLS_GD needs one if local symbol and two if global. */ | |
1578 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1579 | || tls_type == GOT_TLS_IE) | |
1580 | htab->srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
1581 | else if (tls_type == GOT_TLS_GD) | |
1582 | htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rel); | |
1583 | else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) | |
6725bdbf AM |
1584 | htab->srelgot->_raw_size += sizeof (Elf32_External_Rel); |
1585 | } | |
1586 | else | |
51b64d56 | 1587 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 1588 | |
5a15f56f AM |
1589 | eh = (struct elf_i386_link_hash_entry *) h; |
1590 | if (eh->dyn_relocs == NULL) | |
1591 | return true; | |
1592 | ||
0c715baa AM |
1593 | /* In the shared -Bsymbolic case, discard space allocated for |
1594 | dynamic pc-relative relocs against symbols which turn out to be | |
1595 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
1596 | space for pc-relative relocs that have become local due to symbol |
1597 | visibility changes. */ | |
0c715baa AM |
1598 | |
1599 | if (info->shared) | |
5a15f56f | 1600 | { |
0c715baa AM |
1601 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
1602 | && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
1603 | || info->symbolic)) | |
5a15f56f | 1604 | { |
0c715baa AM |
1605 | struct elf_i386_dyn_relocs **pp; |
1606 | ||
1607 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1608 | { | |
1609 | p->count -= p->pc_count; | |
1610 | p->pc_count = 0; | |
1611 | if (p->count == 0) | |
1612 | *pp = p->next; | |
1613 | else | |
1614 | pp = &p->next; | |
1615 | } | |
5a15f56f | 1616 | } |
0c715baa AM |
1617 | } |
1618 | else | |
1619 | { | |
1620 | /* For the non-shared case, discard space for relocs against | |
1621 | symbols which turn out to need copy relocs or are not | |
1622 | dynamic. */ | |
1623 | ||
1624 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
1625 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1626 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
ebe50bae | 1627 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
1628 | && (h->root.type == bfd_link_hash_undefweak |
1629 | || h->root.type == bfd_link_hash_undefined)))) | |
1630 | { | |
1631 | /* Make sure this symbol is output as a dynamic symbol. | |
1632 | Undefined weak syms won't yet be marked as dynamic. */ | |
1633 | if (h->dynindx == -1 | |
1634 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1635 | { | |
1636 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
1637 | return false; | |
1638 | } | |
5a15f56f | 1639 | |
0c715baa AM |
1640 | /* If that succeeded, we know we'll be keeping all the |
1641 | relocs. */ | |
1642 | if (h->dynindx != -1) | |
1643 | goto keep; | |
1644 | } | |
1645 | ||
1646 | eh->dyn_relocs = NULL; | |
1647 | ||
ec338859 | 1648 | keep: ; |
5a15f56f AM |
1649 | } |
1650 | ||
0c715baa AM |
1651 | /* Finally, allocate space. */ |
1652 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 1653 | { |
0c715baa AM |
1654 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
1655 | sreloc->_raw_size += p->count * sizeof (Elf32_External_Rel); | |
12d0ee4a AM |
1656 | } |
1657 | ||
6725bdbf AM |
1658 | return true; |
1659 | } | |
1660 | ||
0c715baa AM |
1661 | /* Find any dynamic relocs that apply to read-only sections. */ |
1662 | ||
1663 | static boolean | |
1664 | readonly_dynrelocs (h, inf) | |
1665 | struct elf_link_hash_entry *h; | |
1666 | PTR inf; | |
1667 | { | |
1668 | struct elf_i386_link_hash_entry *eh; | |
1669 | struct elf_i386_dyn_relocs *p; | |
1670 | ||
e92d460e AM |
1671 | if (h->root.type == bfd_link_hash_warning) |
1672 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1673 | ||
0c715baa AM |
1674 | eh = (struct elf_i386_link_hash_entry *) h; |
1675 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1676 | { | |
1677 | asection *s = p->sec->output_section; | |
1678 | ||
1679 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1680 | { | |
1681 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1682 | ||
1683 | info->flags |= DF_TEXTREL; | |
1684 | ||
1685 | /* Not an error, just cut short the traversal. */ | |
1686 | return false; | |
1687 | } | |
1688 | } | |
1689 | return true; | |
1690 | } | |
1691 | ||
252b5132 RH |
1692 | /* Set the sizes of the dynamic sections. */ |
1693 | ||
1694 | static boolean | |
1695 | elf_i386_size_dynamic_sections (output_bfd, info) | |
db6751f2 | 1696 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1697 | struct bfd_link_info *info; |
1698 | { | |
6725bdbf | 1699 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1700 | bfd *dynobj; |
1701 | asection *s; | |
252b5132 | 1702 | boolean relocs; |
0c715baa | 1703 | bfd *ibfd; |
252b5132 | 1704 | |
6725bdbf | 1705 | htab = elf_i386_hash_table (info); |
ebe50bae | 1706 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
1707 | if (dynobj == NULL) |
1708 | abort (); | |
252b5132 | 1709 | |
ebe50bae | 1710 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
1711 | { |
1712 | /* Set the contents of the .interp section to the interpreter. */ | |
1713 | if (! info->shared) | |
1714 | { | |
1715 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
ffb2e45b AM |
1716 | if (s == NULL) |
1717 | abort (); | |
252b5132 RH |
1718 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
1719 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1720 | } | |
161d71a6 | 1721 | } |
6725bdbf | 1722 | |
0c715baa AM |
1723 | /* Set up .got offsets for local syms, and space for local dynamic |
1724 | relocs. */ | |
1725 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
161d71a6 L |
1726 | { |
1727 | bfd_signed_vma *local_got; | |
1728 | bfd_signed_vma *end_local_got; | |
13ae64f3 | 1729 | char *local_tls_type; |
161d71a6 L |
1730 | bfd_size_type locsymcount; |
1731 | Elf_Internal_Shdr *symtab_hdr; | |
1732 | asection *srel; | |
6725bdbf | 1733 | |
0c715baa | 1734 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
161d71a6 | 1735 | continue; |
6725bdbf | 1736 | |
0c715baa AM |
1737 | for (s = ibfd->sections; s != NULL; s = s->next) |
1738 | { | |
ec338859 | 1739 | struct elf_i386_dyn_relocs *p; |
0c715baa | 1740 | |
ec338859 AM |
1741 | for (p = *((struct elf_i386_dyn_relocs **) |
1742 | &elf_section_data (s)->local_dynrel); | |
1743 | p != NULL; | |
1744 | p = p->next) | |
0c715baa | 1745 | { |
ec338859 AM |
1746 | if (!bfd_is_abs_section (p->sec) |
1747 | && bfd_is_abs_section (p->sec->output_section)) | |
1748 | { | |
1749 | /* Input section has been discarded, either because | |
1750 | it is a copy of a linkonce section or due to | |
1751 | linker script /DISCARD/, so we'll be discarding | |
1752 | the relocs too. */ | |
1753 | } | |
248866a8 | 1754 | else if (p->count != 0) |
ec338859 AM |
1755 | { |
1756 | srel = elf_section_data (p->sec)->sreloc; | |
1757 | srel->_raw_size += p->count * sizeof (Elf32_External_Rel); | |
248866a8 AM |
1758 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
1759 | info->flags |= DF_TEXTREL; | |
ec338859 | 1760 | } |
0c715baa AM |
1761 | } |
1762 | } | |
1763 | ||
1764 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
1765 | if (!local_got) |
1766 | continue; | |
6725bdbf | 1767 | |
0c715baa | 1768 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
161d71a6 L |
1769 | locsymcount = symtab_hdr->sh_info; |
1770 | end_local_got = local_got + locsymcount; | |
13ae64f3 | 1771 | local_tls_type = elf_i386_local_got_tls_type (ibfd); |
161d71a6 L |
1772 | s = htab->sgot; |
1773 | srel = htab->srelgot; | |
13ae64f3 | 1774 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
161d71a6 L |
1775 | { |
1776 | if (*local_got > 0) | |
6725bdbf | 1777 | { |
161d71a6 L |
1778 | *local_got = s->_raw_size; |
1779 | s->_raw_size += 4; | |
13ae64f3 JJ |
1780 | if (*local_tls_type == GOT_TLS_GD) |
1781 | s->_raw_size += 4; | |
1782 | if (info->shared | |
1783 | || *local_tls_type == GOT_TLS_GD | |
1784 | || *local_tls_type == GOT_TLS_IE) | |
161d71a6 | 1785 | srel->_raw_size += sizeof (Elf32_External_Rel); |
6725bdbf | 1786 | } |
161d71a6 L |
1787 | else |
1788 | *local_got = (bfd_vma) -1; | |
6725bdbf | 1789 | } |
252b5132 | 1790 | } |
6725bdbf | 1791 | |
13ae64f3 JJ |
1792 | if (htab->tls_ldm_got.refcount > 0) |
1793 | { | |
1794 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
1795 | relocs. */ | |
1796 | htab->tls_ldm_got.offset = htab->sgot->_raw_size; | |
1797 | htab->sgot->_raw_size += 8; | |
1798 | htab->srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
1799 | } | |
1800 | else | |
1801 | htab->tls_ldm_got.offset = -1; | |
1802 | ||
0c715baa AM |
1803 | /* Allocate global sym .plt and .got entries, and space for global |
1804 | sym dynamic relocs. */ | |
ebe50bae | 1805 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); |
252b5132 | 1806 | |
5a15f56f AM |
1807 | /* We now have determined the sizes of the various dynamic sections. |
1808 | Allocate memory for them. */ | |
252b5132 | 1809 | relocs = false; |
252b5132 RH |
1810 | for (s = dynobj->sections; s != NULL; s = s->next) |
1811 | { | |
252b5132 RH |
1812 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
1813 | continue; | |
1814 | ||
6725bdbf AM |
1815 | if (s == htab->splt |
1816 | || s == htab->sgot | |
1817 | || s == htab->sgotplt) | |
252b5132 | 1818 | { |
6725bdbf AM |
1819 | /* Strip this section if we don't need it; see the |
1820 | comment below. */ | |
252b5132 | 1821 | } |
6725bdbf | 1822 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0) |
252b5132 | 1823 | { |
0ac8d2ca AM |
1824 | if (s->_raw_size != 0 && s != htab->srelplt) |
1825 | relocs = true; | |
252b5132 | 1826 | |
0ac8d2ca AM |
1827 | /* We use the reloc_count field as a counter if we need |
1828 | to copy relocs into the output file. */ | |
1829 | s->reloc_count = 0; | |
252b5132 | 1830 | } |
6725bdbf | 1831 | else |
252b5132 RH |
1832 | { |
1833 | /* It's not one of our sections, so don't allocate space. */ | |
1834 | continue; | |
1835 | } | |
1836 | ||
6725bdbf | 1837 | if (s->_raw_size == 0) |
252b5132 | 1838 | { |
0ac8d2ca AM |
1839 | /* If we don't need this section, strip it from the |
1840 | output file. This is mostly to handle .rel.bss and | |
1841 | .rel.plt. We must create both sections in | |
1842 | create_dynamic_sections, because they must be created | |
1843 | before the linker maps input sections to output | |
1844 | sections. The linker does that before | |
1845 | adjust_dynamic_symbol is called, and it is that | |
1846 | function which decides whether anything needs to go | |
1847 | into these sections. */ | |
1848 | ||
7f8d5fc9 | 1849 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
1850 | continue; |
1851 | } | |
1852 | ||
f69da49f AM |
1853 | /* Allocate memory for the section contents. We use bfd_zalloc |
1854 | here in case unused entries are not reclaimed before the | |
1855 | section's contents are written out. This should not happen, | |
1856 | but this way if it does, we get a R_386_NONE reloc instead | |
1857 | of garbage. */ | |
7a9af8c4 | 1858 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
6725bdbf | 1859 | if (s->contents == NULL) |
252b5132 RH |
1860 | return false; |
1861 | } | |
1862 | ||
ebe50bae | 1863 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
1864 | { |
1865 | /* Add some entries to the .dynamic section. We fill in the | |
1866 | values later, in elf_i386_finish_dynamic_sections, but we | |
1867 | must add the entries now so that we get the correct size for | |
1868 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1869 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
1870 | #define add_dynamic_entry(TAG, VAL) \ |
1871 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
1872 | ||
252b5132 RH |
1873 | if (! info->shared) |
1874 | { | |
dc810e39 | 1875 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
252b5132 RH |
1876 | return false; |
1877 | } | |
1878 | ||
6725bdbf | 1879 | if (htab->splt->_raw_size != 0) |
252b5132 | 1880 | { |
dc810e39 AM |
1881 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1882 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1883 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
1884 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
252b5132 RH |
1885 | return false; |
1886 | } | |
1887 | ||
1888 | if (relocs) | |
1889 | { | |
dc810e39 AM |
1890 | if (!add_dynamic_entry (DT_REL, 0) |
1891 | || !add_dynamic_entry (DT_RELSZ, 0) | |
1892 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
252b5132 | 1893 | return false; |
252b5132 | 1894 | |
0c715baa AM |
1895 | /* If any dynamic relocs apply to a read-only section, |
1896 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
1897 | if ((info->flags & DF_TEXTREL) == 0) |
1898 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
1899 | (PTR) info); | |
0c715baa AM |
1900 | |
1901 | if ((info->flags & DF_TEXTREL) != 0) | |
1902 | { | |
1903 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
1904 | return false; | |
1905 | } | |
252b5132 RH |
1906 | } |
1907 | } | |
dc810e39 | 1908 | #undef add_dynamic_entry |
252b5132 RH |
1909 | |
1910 | return true; | |
1911 | } | |
1912 | ||
38701953 AM |
1913 | /* Set the correct type for an x86 ELF section. We do this by the |
1914 | section name, which is a hack, but ought to work. */ | |
1915 | ||
1916 | static boolean | |
1917 | elf_i386_fake_sections (abfd, hdr, sec) | |
1918 | bfd *abfd ATTRIBUTE_UNUSED; | |
1919 | Elf32_Internal_Shdr *hdr; | |
1920 | asection *sec; | |
1921 | { | |
1922 | register const char *name; | |
1923 | ||
1924 | name = bfd_get_section_name (abfd, sec); | |
1925 | ||
1926 | /* This is an ugly, but unfortunately necessary hack that is | |
1927 | needed when producing EFI binaries on x86. It tells | |
1928 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
1929 | containing ELF relocation info. We need this hack in order to | |
1930 | be able to generate ELF binaries that can be translated into | |
1931 | EFI applications (which are essentially COFF objects). Those | |
1932 | files contain a COFF ".reloc" section inside an ELFNN object, | |
1933 | which would normally cause BFD to segfault because it would | |
1934 | attempt to interpret this section as containing relocation | |
1935 | entries for section "oc". With this hack enabled, ".reloc" | |
1936 | will be treated as a normal data section, which will avoid the | |
1937 | segfault. However, you won't be able to create an ELFNN binary | |
1938 | with a section named "oc" that needs relocations, but that's | |
1939 | the kind of ugly side-effects you get when detecting section | |
1940 | types based on their names... In practice, this limitation is | |
1941 | unlikely to bite. */ | |
1942 | if (strcmp (name, ".reloc") == 0) | |
1943 | hdr->sh_type = SHT_PROGBITS; | |
1944 | ||
1945 | return true; | |
1946 | } | |
1947 | ||
13ae64f3 JJ |
1948 | /* Return the base VMA address which should be subtracted from real addresses |
1949 | when resolving @dtpoff relocation. | |
1950 | This is PT_TLS segment p_vaddr. */ | |
1951 | ||
1952 | static bfd_vma | |
1953 | dtpoff_base (info) | |
1954 | struct bfd_link_info *info; | |
1955 | { | |
1956 | BFD_ASSERT (elf_hash_table (info)->tls_segment != NULL); | |
1957 | return elf_hash_table (info)->tls_segment->start; | |
1958 | } | |
1959 | ||
1960 | /* Return the relocation value for @tpoff relocation | |
1961 | if STT_TLS virtual address is ADDRESS. */ | |
1962 | ||
1963 | static bfd_vma | |
1964 | tpoff (info, address) | |
1965 | struct bfd_link_info *info; | |
1966 | bfd_vma address; | |
1967 | { | |
1968 | struct elf_link_tls_segment *tls_segment | |
1969 | = elf_hash_table (info)->tls_segment; | |
1970 | ||
1971 | BFD_ASSERT (tls_segment != NULL); | |
1972 | return (align_power (tls_segment->size, tls_segment->align) | |
1973 | + tls_segment->start - address); | |
1974 | } | |
1975 | ||
252b5132 RH |
1976 | /* Relocate an i386 ELF section. */ |
1977 | ||
1978 | static boolean | |
1979 | elf_i386_relocate_section (output_bfd, info, input_bfd, input_section, | |
1980 | contents, relocs, local_syms, local_sections) | |
1981 | bfd *output_bfd; | |
1982 | struct bfd_link_info *info; | |
1983 | bfd *input_bfd; | |
1984 | asection *input_section; | |
1985 | bfd_byte *contents; | |
1986 | Elf_Internal_Rela *relocs; | |
1987 | Elf_Internal_Sym *local_syms; | |
1988 | asection **local_sections; | |
1989 | { | |
6725bdbf | 1990 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1991 | Elf_Internal_Shdr *symtab_hdr; |
1992 | struct elf_link_hash_entry **sym_hashes; | |
1993 | bfd_vma *local_got_offsets; | |
252b5132 RH |
1994 | Elf_Internal_Rela *rel; |
1995 | Elf_Internal_Rela *relend; | |
1996 | ||
6725bdbf | 1997 | htab = elf_i386_hash_table (info); |
252b5132 RH |
1998 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1999 | sym_hashes = elf_sym_hashes (input_bfd); | |
2000 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
2001 | ||
252b5132 RH |
2002 | rel = relocs; |
2003 | relend = relocs + input_section->reloc_count; | |
2004 | for (; rel < relend; rel++) | |
2005 | { | |
13ae64f3 | 2006 | unsigned int r_type; |
252b5132 RH |
2007 | reloc_howto_type *howto; |
2008 | unsigned long r_symndx; | |
2009 | struct elf_link_hash_entry *h; | |
2010 | Elf_Internal_Sym *sym; | |
2011 | asection *sec; | |
ffb2e45b | 2012 | bfd_vma off; |
252b5132 | 2013 | bfd_vma relocation; |
83be169b | 2014 | boolean unresolved_reloc; |
252b5132 | 2015 | bfd_reloc_status_type r; |
1b452ec6 | 2016 | unsigned int indx; |
13ae64f3 | 2017 | int tls_type; |
252b5132 RH |
2018 | |
2019 | r_type = ELF32_R_TYPE (rel->r_info); | |
dc47f327 AM |
2020 | if (r_type == (int) R_386_GNU_VTINHERIT |
2021 | || r_type == (int) R_386_GNU_VTENTRY) | |
252b5132 | 2022 | continue; |
dc47f327 | 2023 | |
1b452ec6 | 2024 | if ((indx = (unsigned) r_type) >= R_386_standard |
13ae64f3 JJ |
2025 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
2026 | >= R_386_ext - R_386_standard) | |
2027 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
2028 | >= R_386_tls - R_386_ext)) | |
252b5132 RH |
2029 | { |
2030 | bfd_set_error (bfd_error_bad_value); | |
2031 | return false; | |
2032 | } | |
1b452ec6 | 2033 | howto = elf_howto_table + indx; |
252b5132 RH |
2034 | |
2035 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2036 | ||
2037 | if (info->relocateable) | |
2038 | { | |
4a335f3d | 2039 | bfd_vma val; |
4a335f3d AM |
2040 | bfd_byte *where; |
2041 | ||
0ac8d2ca | 2042 | /* This is a relocatable link. We don't have to change |
252b5132 RH |
2043 | anything, unless the reloc is against a section symbol, |
2044 | in which case we have to adjust according to where the | |
2045 | section symbol winds up in the output section. */ | |
4a335f3d AM |
2046 | if (r_symndx >= symtab_hdr->sh_info) |
2047 | continue; | |
2048 | ||
2049 | sym = local_syms + r_symndx; | |
2050 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
2051 | continue; | |
2052 | ||
2053 | sec = local_sections[r_symndx]; | |
2054 | val = sec->output_offset; | |
2055 | if (val == 0) | |
2056 | continue; | |
2057 | ||
2058 | where = contents + rel->r_offset; | |
2059 | switch (howto->size) | |
252b5132 | 2060 | { |
16a10388 | 2061 | /* FIXME: overflow checks. */ |
4a335f3d | 2062 | case 0: |
16a10388 | 2063 | val += bfd_get_8 (input_bfd, where); |
4a335f3d | 2064 | bfd_put_8 (input_bfd, val, where); |
4a335f3d AM |
2065 | break; |
2066 | case 1: | |
16a10388 | 2067 | val += bfd_get_16 (input_bfd, where); |
4a335f3d | 2068 | bfd_put_16 (input_bfd, val, where); |
4a335f3d AM |
2069 | break; |
2070 | case 2: | |
2071 | val += bfd_get_32 (input_bfd, where); | |
2072 | bfd_put_32 (input_bfd, val, where); | |
2073 | break; | |
2074 | default: | |
2075 | abort (); | |
252b5132 | 2076 | } |
252b5132 RH |
2077 | continue; |
2078 | } | |
2079 | ||
2080 | /* This is a final link. */ | |
2081 | h = NULL; | |
2082 | sym = NULL; | |
2083 | sec = NULL; | |
83be169b | 2084 | unresolved_reloc = false; |
252b5132 RH |
2085 | if (r_symndx < symtab_hdr->sh_info) |
2086 | { | |
2087 | sym = local_syms + r_symndx; | |
2088 | sec = local_sections[r_symndx]; | |
2089 | relocation = (sec->output_section->vma | |
2090 | + sec->output_offset | |
2091 | + sym->st_value); | |
f8df10f4 JJ |
2092 | if ((sec->flags & SEC_MERGE) |
2093 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
2094 | { | |
2095 | asection *msec; | |
2096 | bfd_vma addend; | |
4a335f3d | 2097 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 2098 | |
4a335f3d | 2099 | switch (howto->size) |
f8df10f4 | 2100 | { |
4a335f3d AM |
2101 | case 0: |
2102 | addend = bfd_get_8 (input_bfd, where); | |
2103 | if (howto->pc_relative) | |
2104 | { | |
2105 | addend = (addend ^ 0x80) - 0x80; | |
2106 | addend += 1; | |
2107 | } | |
2108 | break; | |
2109 | case 1: | |
2110 | addend = bfd_get_16 (input_bfd, where); | |
2111 | if (howto->pc_relative) | |
2112 | { | |
2113 | addend = (addend ^ 0x8000) - 0x8000; | |
2114 | addend += 2; | |
2115 | } | |
2116 | break; | |
2117 | case 2: | |
2118 | addend = bfd_get_32 (input_bfd, where); | |
2119 | if (howto->pc_relative) | |
2120 | { | |
2121 | addend = (addend ^ 0x80000000) - 0x80000000; | |
2122 | addend += 4; | |
2123 | } | |
2124 | break; | |
2125 | default: | |
2126 | abort (); | |
f8df10f4 JJ |
2127 | } |
2128 | ||
f8df10f4 | 2129 | msec = sec; |
4a335f3d AM |
2130 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend); |
2131 | addend -= relocation; | |
f8df10f4 | 2132 | addend += msec->output_section->vma + msec->output_offset; |
4a335f3d AM |
2133 | |
2134 | switch (howto->size) | |
2135 | { | |
2136 | case 0: | |
16a10388 | 2137 | /* FIXME: overflow checks. */ |
4a335f3d AM |
2138 | if (howto->pc_relative) |
2139 | addend -= 1; | |
2140 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
2141 | break; |
2142 | case 1: | |
2143 | if (howto->pc_relative) | |
2144 | addend -= 2; | |
2145 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
2146 | break; |
2147 | case 2: | |
2148 | if (howto->pc_relative) | |
2149 | addend -= 4; | |
2150 | bfd_put_32 (input_bfd, addend, where); | |
2151 | break; | |
2152 | } | |
f8df10f4 | 2153 | } |
252b5132 RH |
2154 | } |
2155 | else | |
2156 | { | |
2157 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2158 | while (h->root.type == bfd_link_hash_indirect | |
2159 | || h->root.type == bfd_link_hash_warning) | |
2160 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
ffb2e45b | 2161 | |
6725bdbf | 2162 | relocation = 0; |
252b5132 RH |
2163 | if (h->root.type == bfd_link_hash_defined |
2164 | || h->root.type == bfd_link_hash_defweak) | |
2165 | { | |
2166 | sec = h->root.u.def.section; | |
83be169b AM |
2167 | if (sec->output_section == NULL) |
2168 | /* Set a flag that will be cleared later if we find a | |
2169 | relocation value for this symbol. output_section | |
2170 | is typically NULL for symbols satisfied by a shared | |
2171 | library. */ | |
2172 | unresolved_reloc = true; | |
252b5132 RH |
2173 | else |
2174 | relocation = (h->root.u.def.value | |
2175 | + sec->output_section->vma | |
2176 | + sec->output_offset); | |
2177 | } | |
2178 | else if (h->root.type == bfd_link_hash_undefweak) | |
6725bdbf | 2179 | ; |
671bae9c NC |
2180 | else if (info->shared |
2181 | && (!info->symbolic || info->allow_shlib_undefined) | |
3a27a730 L |
2182 | && !info->no_undefined |
2183 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
6725bdbf | 2184 | ; |
252b5132 RH |
2185 | else |
2186 | { | |
2187 | if (! ((*info->callbacks->undefined_symbol) | |
2188 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 2189 | input_section, rel->r_offset, |
3a27a730 L |
2190 | (!info->shared || info->no_undefined |
2191 | || ELF_ST_VISIBILITY (h->other))))) | |
252b5132 | 2192 | return false; |
252b5132 RH |
2193 | } |
2194 | } | |
2195 | ||
2196 | switch (r_type) | |
2197 | { | |
2198 | case R_386_GOT32: | |
2199 | /* Relocation is to the entry for this symbol in the global | |
2200 | offset table. */ | |
ffb2e45b AM |
2201 | if (htab->sgot == NULL) |
2202 | abort (); | |
252b5132 RH |
2203 | |
2204 | if (h != NULL) | |
2205 | { | |
6725bdbf | 2206 | boolean dyn; |
252b5132 RH |
2207 | |
2208 | off = h->got.offset; | |
ebe50bae | 2209 | dyn = htab->elf.dynamic_sections_created; |
6725bdbf | 2210 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) |
252b5132 | 2211 | || (info->shared |
6725bdbf AM |
2212 | && (info->symbolic |
2213 | || h->dynindx == -1 | |
2214 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
252b5132 RH |
2215 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
2216 | { | |
2217 | /* This is actually a static link, or it is a | |
2218 | -Bsymbolic link and the symbol is defined | |
2219 | locally, or the symbol was forced to be local | |
2220 | because of a version file. We must initialize | |
2221 | this entry in the global offset table. Since the | |
2222 | offset must always be a multiple of 4, we use the | |
2223 | least significant bit to record whether we have | |
2224 | initialized it already. | |
2225 | ||
2226 | When doing a dynamic link, we create a .rel.got | |
2227 | relocation entry to initialize the value. This | |
2228 | is done in the finish_dynamic_symbol routine. */ | |
2229 | if ((off & 1) != 0) | |
2230 | off &= ~1; | |
2231 | else | |
2232 | { | |
2233 | bfd_put_32 (output_bfd, relocation, | |
6725bdbf | 2234 | htab->sgot->contents + off); |
252b5132 RH |
2235 | h->got.offset |= 1; |
2236 | } | |
2237 | } | |
8c694914 AM |
2238 | else |
2239 | unresolved_reloc = false; | |
252b5132 RH |
2240 | } |
2241 | else | |
2242 | { | |
ffb2e45b AM |
2243 | if (local_got_offsets == NULL) |
2244 | abort (); | |
252b5132 RH |
2245 | |
2246 | off = local_got_offsets[r_symndx]; | |
2247 | ||
2248 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
2249 | the least significant bit to record whether we have |
2250 | already generated the necessary reloc. */ | |
252b5132 RH |
2251 | if ((off & 1) != 0) |
2252 | off &= ~1; | |
2253 | else | |
2254 | { | |
6725bdbf AM |
2255 | bfd_put_32 (output_bfd, relocation, |
2256 | htab->sgot->contents + off); | |
252b5132 RH |
2257 | |
2258 | if (info->shared) | |
2259 | { | |
2260 | asection *srelgot; | |
2261 | Elf_Internal_Rel outrel; | |
0ac8d2ca | 2262 | Elf32_External_Rel *loc; |
252b5132 | 2263 | |
6725bdbf | 2264 | srelgot = htab->srelgot; |
ffb2e45b AM |
2265 | if (srelgot == NULL) |
2266 | abort (); | |
252b5132 | 2267 | |
6725bdbf AM |
2268 | outrel.r_offset = (htab->sgot->output_section->vma |
2269 | + htab->sgot->output_offset | |
252b5132 RH |
2270 | + off); |
2271 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
0ac8d2ca AM |
2272 | loc = (Elf32_External_Rel *) srelgot->contents; |
2273 | loc += srelgot->reloc_count++; | |
2274 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
252b5132 RH |
2275 | } |
2276 | ||
2277 | local_got_offsets[r_symndx] |= 1; | |
2278 | } | |
252b5132 RH |
2279 | } |
2280 | ||
ffb2e45b AM |
2281 | if (off >= (bfd_vma) -2) |
2282 | abort (); | |
2283 | ||
2284 | relocation = htab->sgot->output_offset + off; | |
252b5132 RH |
2285 | break; |
2286 | ||
2287 | case R_386_GOTOFF: | |
2288 | /* Relocation is relative to the start of the global offset | |
2289 | table. */ | |
2290 | ||
252b5132 RH |
2291 | /* Note that sgot->output_offset is not involved in this |
2292 | calculation. We always want the start of .got. If we | |
2293 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
2294 | permitted by the ABI, we might have to change this | |
2295 | calculation. */ | |
6725bdbf | 2296 | relocation -= htab->sgot->output_section->vma; |
252b5132 RH |
2297 | break; |
2298 | ||
2299 | case R_386_GOTPC: | |
2300 | /* Use global offset table as symbol value. */ | |
6725bdbf | 2301 | relocation = htab->sgot->output_section->vma; |
83be169b | 2302 | unresolved_reloc = false; |
252b5132 RH |
2303 | break; |
2304 | ||
2305 | case R_386_PLT32: | |
2306 | /* Relocation is to the entry for this symbol in the | |
2307 | procedure linkage table. */ | |
2308 | ||
dd5724d5 | 2309 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 2310 | without using the procedure linkage table. */ |
252b5132 RH |
2311 | if (h == NULL) |
2312 | break; | |
2313 | ||
dd5724d5 | 2314 | if (h->plt.offset == (bfd_vma) -1 |
6725bdbf | 2315 | || htab->splt == NULL) |
252b5132 RH |
2316 | { |
2317 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
2318 | happens when statically linking PIC code, or when |
2319 | using -Bsymbolic. */ | |
252b5132 RH |
2320 | break; |
2321 | } | |
2322 | ||
6725bdbf AM |
2323 | relocation = (htab->splt->output_section->vma |
2324 | + htab->splt->output_offset | |
252b5132 | 2325 | + h->plt.offset); |
83be169b | 2326 | unresolved_reloc = false; |
252b5132 RH |
2327 | break; |
2328 | ||
2329 | case R_386_32: | |
2330 | case R_386_PC32: | |
ec338859 AM |
2331 | /* r_symndx will be zero only for relocs against symbols |
2332 | from removed linkonce sections, or sections discarded by | |
2333 | a linker script. */ | |
2334 | if (r_symndx == 0 | |
2335 | || (input_section->flags & SEC_ALLOC) == 0) | |
2336 | break; | |
2337 | ||
12d0ee4a | 2338 | if ((info->shared |
12d0ee4a AM |
2339 | && (r_type != R_386_PC32 |
2340 | || (h != NULL | |
2341 | && h->dynindx != -1 | |
2342 | && (! info->symbolic | |
2343 | || (h->elf_link_hash_flags | |
2344 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
2345 | || (!info->shared | |
12d0ee4a AM |
2346 | && h != NULL |
2347 | && h->dynindx != -1 | |
2348 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
56882138 AM |
2349 | && (((h->elf_link_hash_flags |
2350 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2351 | && (h->elf_link_hash_flags | |
2352 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
28d0b90e AM |
2353 | || h->root.type == bfd_link_hash_undefweak |
2354 | || h->root.type == bfd_link_hash_undefined))) | |
252b5132 RH |
2355 | { |
2356 | Elf_Internal_Rel outrel; | |
2357 | boolean skip, relocate; | |
0c715baa AM |
2358 | asection *sreloc; |
2359 | Elf32_External_Rel *loc; | |
252b5132 RH |
2360 | |
2361 | /* When generating a shared object, these relocations | |
2362 | are copied into the output file to be resolved at run | |
2363 | time. */ | |
2364 | ||
252b5132 | 2365 | skip = false; |
0bb2d96a | 2366 | relocate = false; |
252b5132 | 2367 | |
c629eae0 JJ |
2368 | outrel.r_offset = |
2369 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2370 | rel->r_offset); | |
2371 | if (outrel.r_offset == (bfd_vma) -1) | |
2372 | skip = true; | |
0bb2d96a JJ |
2373 | else if (outrel.r_offset == (bfd_vma) -2) |
2374 | skip = true, relocate = true; | |
252b5132 RH |
2375 | outrel.r_offset += (input_section->output_section->vma |
2376 | + input_section->output_offset); | |
2377 | ||
2378 | if (skip) | |
0bb2d96a | 2379 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
2380 | else if (h != NULL |
2381 | && h->dynindx != -1 | |
2382 | && (r_type == R_386_PC32 | |
2383 | || !info->shared | |
2384 | || !info->symbolic | |
2385 | || (h->elf_link_hash_flags | |
2386 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
0bb2d96a | 2387 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
2388 | else |
2389 | { | |
5a15f56f AM |
2390 | /* This symbol is local, or marked to become local. */ |
2391 | relocate = true; | |
2392 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
252b5132 RH |
2393 | } |
2394 | ||
0c715baa AM |
2395 | sreloc = elf_section_data (input_section)->sreloc; |
2396 | if (sreloc == NULL) | |
2397 | abort (); | |
2398 | ||
0ac8d2ca AM |
2399 | loc = (Elf32_External_Rel *) sreloc->contents; |
2400 | loc += sreloc->reloc_count++; | |
0c715baa | 2401 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
252b5132 RH |
2402 | |
2403 | /* If this reloc is against an external symbol, we do | |
2404 | not want to fiddle with the addend. Otherwise, we | |
2405 | need to include the symbol value so that it becomes | |
2406 | an addend for the dynamic reloc. */ | |
2407 | if (! relocate) | |
2408 | continue; | |
2409 | } | |
252b5132 RH |
2410 | break; |
2411 | ||
13ae64f3 JJ |
2412 | case R_386_TLS_GD: |
2413 | case R_386_TLS_IE_32: | |
2414 | r_type = elf_i386_tls_transition (info, r_type, h == NULL); | |
2415 | tls_type = GOT_UNKNOWN; | |
2416 | if (h == NULL && local_got_offsets) | |
2417 | tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx]; | |
2418 | else if (h != NULL) | |
2419 | { | |
2420 | tls_type = elf_i386_hash_entry(h)->tls_type; | |
2421 | if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE) | |
2422 | r_type = R_386_TLS_LE_32; | |
2423 | } | |
2424 | if (r_type == R_386_TLS_GD && tls_type == GOT_TLS_IE) | |
2425 | r_type = R_386_TLS_IE_32; | |
2426 | ||
2427 | if (r_type == R_386_TLS_LE_32) | |
2428 | { | |
82e51918 | 2429 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
2430 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
2431 | { | |
2432 | unsigned int val, type; | |
2433 | bfd_vma roff; | |
2434 | ||
2435 | /* GD->LE transition. */ | |
2436 | BFD_ASSERT (rel->r_offset >= 2); | |
2437 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
2438 | BFD_ASSERT (type == 0x8d || type == 0x04); | |
2439 | BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size); | |
2440 | BFD_ASSERT (bfd_get_8 (input_bfd, | |
2441 | contents + rel->r_offset + 4) | |
2442 | == 0xe8); | |
2443 | BFD_ASSERT (rel + 1 < relend); | |
2444 | BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
2445 | roff = rel->r_offset + 5; | |
2446 | val = bfd_get_8 (input_bfd, | |
2447 | contents + rel->r_offset - 1); | |
2448 | if (type == 0x04) | |
2449 | { | |
2450 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
2451 | Change it into: | |
2452 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
2453 | (6 byte form of subl). */ | |
2454 | BFD_ASSERT (rel->r_offset >= 3); | |
2455 | BFD_ASSERT (bfd_get_8 (input_bfd, | |
2456 | contents + rel->r_offset - 3) | |
2457 | == 0x8d); | |
2458 | BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3)); | |
2459 | memcpy (contents + rel->r_offset - 3, | |
2460 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
2461 | } | |
2462 | else | |
2463 | { | |
2464 | BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4); | |
2465 | if (rel->r_offset + 10 <= input_section->_raw_size | |
2466 | && bfd_get_8 (input_bfd, | |
2467 | contents + rel->r_offset + 9) == 0x90) | |
2468 | { | |
2469 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop | |
2470 | Change it into: | |
2471 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
2472 | (6 byte form of subl). */ | |
2473 | memcpy (contents + rel->r_offset - 2, | |
2474 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
2475 | roff = rel->r_offset + 6; | |
2476 | } | |
2477 | else | |
2478 | { | |
2479 | /* leal foo(%reg), %eax; call ___tls_get_addr | |
2480 | Change it into: | |
2481 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
2482 | (5 byte form of subl). */ | |
2483 | memcpy (contents + rel->r_offset - 2, | |
2484 | "\x65\xa1\0\0\0\0\x2d\0\0\0", 11); | |
2485 | } | |
2486 | } | |
2487 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
2488 | contents + roff); | |
2489 | /* Skip R_386_PLT32. */ | |
2490 | rel++; | |
2491 | continue; | |
2492 | } | |
2493 | else | |
2494 | { | |
2495 | unsigned int val, type; | |
2496 | ||
2497 | /* IE->LE transition: | |
2498 | Originally it can be either: | |
2499 | subl foo(%reg1), %reg2 | |
2500 | or | |
2501 | movl foo(%reg1), %reg2 | |
2502 | We change it into: | |
2503 | subl $foo, %reg2 | |
2504 | or | |
2505 | movl $foo, %reg2 (6 byte form) */ | |
2506 | BFD_ASSERT (rel->r_offset >= 2); | |
2507 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
2508 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
2509 | BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size); | |
2510 | if (type == 0x8b) | |
2511 | { | |
2512 | /* movl */ | |
2513 | BFD_ASSERT ((val & 0xc0) == 0x80 && (val & 7) != 4); | |
2514 | bfd_put_8 (output_bfd, 0xc7, | |
2515 | contents + rel->r_offset - 2); | |
2516 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
2517 | contents + rel->r_offset - 1); | |
2518 | } | |
2519 | else if (type == 0x2b) | |
2520 | { | |
2521 | /* subl */ | |
2522 | BFD_ASSERT ((val & 0xc0) == 0x80 && (val & 7) != 4); | |
2523 | bfd_put_8 (output_bfd, 0x81, | |
2524 | contents + rel->r_offset - 2); | |
2525 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
2526 | contents + rel->r_offset - 1); | |
2527 | } | |
2528 | else | |
2529 | BFD_FAIL (); | |
2530 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
2531 | contents + rel->r_offset); | |
2532 | continue; | |
2533 | } | |
2534 | } | |
2535 | ||
2536 | if (htab->sgot == NULL) | |
2537 | abort (); | |
2538 | ||
2539 | if (h != NULL) | |
2540 | off = h->got.offset; | |
2541 | else | |
2542 | { | |
2543 | if (local_got_offsets == NULL) | |
2544 | abort (); | |
2545 | ||
2546 | off = local_got_offsets[r_symndx]; | |
2547 | } | |
2548 | ||
2549 | if ((off & 1) != 0) | |
2550 | off &= ~1; | |
2551 | else | |
2552 | { | |
2553 | Elf_Internal_Rel outrel; | |
2554 | Elf32_External_Rel *loc; | |
2555 | int dr_type, indx; | |
2556 | ||
2557 | if (htab->srelgot == NULL) | |
2558 | abort (); | |
2559 | ||
2560 | outrel.r_offset = (htab->sgot->output_section->vma | |
2561 | + htab->sgot->output_offset + off); | |
2562 | ||
2563 | bfd_put_32 (output_bfd, 0, | |
2564 | htab->sgot->contents + off); | |
2565 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2566 | if (r_type == R_386_TLS_GD) | |
2567 | dr_type = R_386_TLS_DTPMOD32; | |
2568 | else | |
2569 | dr_type = R_386_TLS_TPOFF32; | |
2570 | outrel.r_info = ELF32_R_INFO (indx, dr_type); | |
2571 | loc = (Elf32_External_Rel *) htab->srelgot->contents; | |
2572 | loc += htab->srelgot->reloc_count++; | |
2573 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
2574 | ||
2575 | if (r_type == R_386_TLS_GD) | |
2576 | { | |
2577 | if (indx == 0) | |
2578 | { | |
82e51918 | 2579 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
2580 | bfd_put_32 (output_bfd, |
2581 | relocation - dtpoff_base (info), | |
2582 | htab->sgot->contents + off + 4); | |
2583 | } | |
2584 | else | |
2585 | { | |
2586 | bfd_put_32 (output_bfd, 0, | |
2587 | htab->sgot->contents + off + 4); | |
2588 | outrel.r_info = ELF32_R_INFO (indx, | |
2589 | R_386_TLS_DTPOFF32); | |
2590 | outrel.r_offset += 4; | |
2591 | htab->srelgot->reloc_count++; | |
2592 | loc++; | |
2593 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, | |
2594 | loc); | |
2595 | } | |
2596 | } | |
2597 | ||
2598 | if (h != NULL) | |
2599 | h->got.offset |= 1; | |
2600 | else | |
2601 | local_got_offsets[r_symndx] |= 1; | |
2602 | } | |
2603 | ||
2604 | if (off >= (bfd_vma) -2) | |
2605 | abort (); | |
2606 | if (r_type == ELF32_R_TYPE (rel->r_info)) | |
2607 | { | |
2608 | relocation = htab->sgot->output_offset + off; | |
2609 | unresolved_reloc = false; | |
2610 | } | |
2611 | else | |
2612 | { | |
2613 | unsigned int val, type; | |
2614 | bfd_vma roff; | |
2615 | ||
2616 | /* GD->IE transition. */ | |
2617 | BFD_ASSERT (rel->r_offset >= 2); | |
2618 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
2619 | BFD_ASSERT (type == 0x8d || type == 0x04); | |
2620 | BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size); | |
2621 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4) | |
2622 | == 0xe8); | |
2623 | BFD_ASSERT (rel + 1 < relend); | |
2624 | BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
2625 | roff = rel->r_offset - 3; | |
2626 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
2627 | if (type == 0x04) | |
2628 | { | |
2629 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
2630 | Change it into: | |
2631 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
2632 | BFD_ASSERT (rel->r_offset >= 3); | |
2633 | BFD_ASSERT (bfd_get_8 (input_bfd, | |
2634 | contents + rel->r_offset - 3) | |
2635 | == 0x8d); | |
2636 | BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3)); | |
2637 | val >>= 3; | |
2638 | } | |
2639 | else | |
2640 | { | |
2641 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop | |
2642 | Change it into: | |
2643 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
2644 | BFD_ASSERT (rel->r_offset + 10 <= input_section->_raw_size); | |
2645 | BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4); | |
2646 | BFD_ASSERT (bfd_get_8 (input_bfd, | |
2647 | contents + rel->r_offset + 9) | |
2648 | == 0x90); | |
2649 | roff = rel->r_offset - 2; | |
2650 | } | |
2651 | memcpy (contents + roff, | |
2652 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
2653 | contents[roff + 7] = 0x80 | (val & 7); | |
2654 | bfd_put_32 (output_bfd, htab->sgot->output_offset + off, | |
2655 | contents + roff + 8); | |
2656 | /* Skip R_386_PLT32. */ | |
2657 | rel++; | |
2658 | continue; | |
2659 | } | |
2660 | break; | |
2661 | ||
2662 | case R_386_TLS_LDM: | |
2663 | if (! info->shared) | |
2664 | { | |
2665 | unsigned int val; | |
2666 | ||
2667 | /* LD->LE transition: | |
2668 | Ensure it is: | |
2669 | leal foo(%reg), %eax; call ___tls_get_addr. | |
2670 | We change it into: | |
2671 | movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */ | |
2672 | BFD_ASSERT (rel->r_offset >= 2); | |
2673 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2) | |
2674 | == 0x8d); | |
2675 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
2676 | BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4); | |
2677 | BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size); | |
2678 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4) | |
2679 | == 0xe8); | |
2680 | BFD_ASSERT (rel + 1 < relend); | |
2681 | BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
2682 | memcpy (contents + rel->r_offset - 2, | |
2683 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
2684 | /* Skip R_386_PLT32. */ | |
2685 | rel++; | |
2686 | continue; | |
2687 | } | |
2688 | ||
2689 | if (htab->sgot == NULL) | |
2690 | abort (); | |
2691 | ||
2692 | off = htab->tls_ldm_got.offset; | |
2693 | if (off & 1) | |
2694 | off &= ~1; | |
2695 | else | |
2696 | { | |
2697 | Elf_Internal_Rel outrel; | |
2698 | Elf32_External_Rel *loc; | |
2699 | ||
2700 | if (htab->srelgot == NULL) | |
2701 | abort (); | |
2702 | ||
2703 | outrel.r_offset = (htab->sgot->output_section->vma | |
2704 | + htab->sgot->output_offset + off); | |
2705 | ||
2706 | bfd_put_32 (output_bfd, 0, | |
2707 | htab->sgot->contents + off); | |
2708 | bfd_put_32 (output_bfd, 0, | |
2709 | htab->sgot->contents + off + 4); | |
2710 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); | |
2711 | loc = (Elf32_External_Rel *) htab->srelgot->contents; | |
2712 | loc += htab->srelgot->reloc_count++; | |
2713 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
2714 | htab->tls_ldm_got.offset |= 1; | |
2715 | } | |
2716 | relocation = htab->sgot->output_offset + off; | |
2717 | unresolved_reloc = false; | |
2718 | break; | |
2719 | ||
2720 | case R_386_TLS_LDO_32: | |
2721 | if (info->shared) | |
2722 | relocation -= dtpoff_base (info); | |
2723 | else | |
2724 | /* When converting LDO to LE, we must negate. */ | |
2725 | relocation = -tpoff (info, relocation); | |
2726 | break; | |
2727 | ||
2728 | case R_386_TLS_LE_32: | |
2729 | relocation = tpoff (info, relocation); | |
2730 | break; | |
2731 | ||
2732 | case R_386_TLS_LE: | |
2733 | relocation = -tpoff (info, relocation); | |
2734 | break; | |
2735 | ||
252b5132 RH |
2736 | default: |
2737 | break; | |
2738 | } | |
2739 | ||
8c694914 AM |
2740 | /* FIXME: Why do we allow debugging sections to escape this error? |
2741 | More importantly, why do we not emit dynamic relocs for | |
2742 | R_386_32 above in debugging sections (which are ! SEC_ALLOC)? | |
2743 | If we had emitted the dynamic reloc, we could remove the | |
2744 | fudge here. */ | |
2745 | if (unresolved_reloc | |
2746 | && !(info->shared | |
2747 | && (input_section->flags & SEC_DEBUGGING) != 0 | |
2748 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) | |
83be169b AM |
2749 | (*_bfd_error_handler) |
2750 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), | |
8f615d07 | 2751 | bfd_archive_filename (input_bfd), |
83be169b AM |
2752 | bfd_get_section_name (input_bfd, input_section), |
2753 | (long) rel->r_offset, | |
2754 | h->root.root.string); | |
2755 | ||
252b5132 RH |
2756 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
2757 | contents, rel->r_offset, | |
2758 | relocation, (bfd_vma) 0); | |
2759 | ||
cf5c0c5b | 2760 | if (r != bfd_reloc_ok) |
252b5132 | 2761 | { |
cf5c0c5b | 2762 | const char *name; |
ffb2e45b | 2763 | |
cf5c0c5b AM |
2764 | if (h != NULL) |
2765 | name = h->root.root.string; | |
2766 | else | |
2767 | { | |
2768 | name = bfd_elf_string_from_elf_section (input_bfd, | |
2769 | symtab_hdr->sh_link, | |
2770 | sym->st_name); | |
2771 | if (name == NULL) | |
2772 | return false; | |
2773 | if (*name == '\0') | |
2774 | name = bfd_section_name (input_bfd, sec); | |
2775 | } | |
ffb2e45b | 2776 | |
cf5c0c5b AM |
2777 | if (r == bfd_reloc_overflow) |
2778 | { | |
cf5c0c5b AM |
2779 | if (! ((*info->callbacks->reloc_overflow) |
2780 | (info, name, howto->name, (bfd_vma) 0, | |
2781 | input_bfd, input_section, rel->r_offset))) | |
2782 | return false; | |
2783 | } | |
2784 | else | |
2785 | { | |
2786 | (*_bfd_error_handler) | |
2787 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), | |
2788 | bfd_archive_filename (input_bfd), | |
2789 | bfd_get_section_name (input_bfd, input_section), | |
2790 | (long) rel->r_offset, name, (int) r); | |
2791 | return false; | |
2792 | } | |
252b5132 RH |
2793 | } |
2794 | } | |
2795 | ||
2796 | return true; | |
2797 | } | |
2798 | ||
2799 | /* Finish up dynamic symbol handling. We set the contents of various | |
2800 | dynamic sections here. */ | |
2801 | ||
2802 | static boolean | |
2803 | elf_i386_finish_dynamic_symbol (output_bfd, info, h, sym) | |
2804 | bfd *output_bfd; | |
2805 | struct bfd_link_info *info; | |
2806 | struct elf_link_hash_entry *h; | |
2807 | Elf_Internal_Sym *sym; | |
2808 | { | |
6725bdbf | 2809 | struct elf_i386_link_hash_table *htab; |
252b5132 | 2810 | |
6725bdbf | 2811 | htab = elf_i386_hash_table (info); |
252b5132 RH |
2812 | |
2813 | if (h->plt.offset != (bfd_vma) -1) | |
2814 | { | |
252b5132 RH |
2815 | bfd_vma plt_index; |
2816 | bfd_vma got_offset; | |
2817 | Elf_Internal_Rel rel; | |
0ac8d2ca | 2818 | Elf32_External_Rel *loc; |
252b5132 RH |
2819 | |
2820 | /* This symbol has an entry in the procedure linkage table. Set | |
2821 | it up. */ | |
2822 | ||
ffb2e45b AM |
2823 | if (h->dynindx == -1 |
2824 | || htab->splt == NULL | |
2825 | || htab->sgotplt == NULL | |
2826 | || htab->srelplt == NULL) | |
2827 | abort (); | |
252b5132 RH |
2828 | |
2829 | /* Get the index in the procedure linkage table which | |
2830 | corresponds to this symbol. This is the index of this symbol | |
2831 | in all the symbols for which we are making plt entries. The | |
2832 | first entry in the procedure linkage table is reserved. */ | |
2833 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2834 | ||
2835 | /* Get the offset into the .got table of the entry that | |
2836 | corresponds to this function. Each .got entry is 4 bytes. | |
2837 | The first three are reserved. */ | |
2838 | got_offset = (plt_index + 3) * 4; | |
2839 | ||
2840 | /* Fill in the entry in the procedure linkage table. */ | |
2841 | if (! info->shared) | |
2842 | { | |
6725bdbf | 2843 | memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry, |
252b5132 RH |
2844 | PLT_ENTRY_SIZE); |
2845 | bfd_put_32 (output_bfd, | |
6725bdbf AM |
2846 | (htab->sgotplt->output_section->vma |
2847 | + htab->sgotplt->output_offset | |
252b5132 | 2848 | + got_offset), |
6725bdbf | 2849 | htab->splt->contents + h->plt.offset + 2); |
252b5132 RH |
2850 | } |
2851 | else | |
2852 | { | |
6725bdbf | 2853 | memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry, |
252b5132 RH |
2854 | PLT_ENTRY_SIZE); |
2855 | bfd_put_32 (output_bfd, got_offset, | |
6725bdbf | 2856 | htab->splt->contents + h->plt.offset + 2); |
252b5132 RH |
2857 | } |
2858 | ||
2859 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel), | |
6725bdbf | 2860 | htab->splt->contents + h->plt.offset + 7); |
252b5132 | 2861 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), |
6725bdbf | 2862 | htab->splt->contents + h->plt.offset + 12); |
252b5132 RH |
2863 | |
2864 | /* Fill in the entry in the global offset table. */ | |
2865 | bfd_put_32 (output_bfd, | |
6725bdbf AM |
2866 | (htab->splt->output_section->vma |
2867 | + htab->splt->output_offset | |
252b5132 RH |
2868 | + h->plt.offset |
2869 | + 6), | |
6725bdbf | 2870 | htab->sgotplt->contents + got_offset); |
252b5132 RH |
2871 | |
2872 | /* Fill in the entry in the .rel.plt section. */ | |
6725bdbf AM |
2873 | rel.r_offset = (htab->sgotplt->output_section->vma |
2874 | + htab->sgotplt->output_offset | |
252b5132 RH |
2875 | + got_offset); |
2876 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
0ac8d2ca AM |
2877 | loc = (Elf32_External_Rel *) htab->srelplt->contents + plt_index; |
2878 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
2879 | |
2880 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2881 | { | |
2882 | /* Mark the symbol as undefined, rather than as defined in | |
51b64d56 AM |
2883 | the .plt section. Leave the value alone. This is a clue |
2884 | for the dynamic linker, to make function pointer | |
2885 | comparisons work between an application and shared | |
cedb70c5 | 2886 | library. */ |
252b5132 RH |
2887 | sym->st_shndx = SHN_UNDEF; |
2888 | } | |
2889 | } | |
2890 | ||
13ae64f3 JJ |
2891 | if (h->got.offset != (bfd_vma) -1 |
2892 | && elf_i386_hash_entry(h)->tls_type != GOT_TLS_GD | |
2893 | && elf_i386_hash_entry(h)->tls_type != GOT_TLS_IE) | |
252b5132 | 2894 | { |
252b5132 | 2895 | Elf_Internal_Rel rel; |
0ac8d2ca | 2896 | Elf32_External_Rel *loc; |
252b5132 RH |
2897 | |
2898 | /* This symbol has an entry in the global offset table. Set it | |
2899 | up. */ | |
2900 | ||
ffb2e45b AM |
2901 | if (htab->sgot == NULL || htab->srelgot == NULL) |
2902 | abort (); | |
252b5132 | 2903 | |
6725bdbf AM |
2904 | rel.r_offset = (htab->sgot->output_section->vma |
2905 | + htab->sgot->output_offset | |
dc810e39 | 2906 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 2907 | |
dd5724d5 AM |
2908 | /* If this is a static link, or it is a -Bsymbolic link and the |
2909 | symbol is defined locally or was forced to be local because | |
2910 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
2911 | The entry in the global offset table will already have been |
2912 | initialized in the relocate_section function. */ | |
6725bdbf AM |
2913 | if (info->shared |
2914 | && (info->symbolic | |
2915 | || h->dynindx == -1 | |
2916 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
2917 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
dd5724d5 | 2918 | { |
6725bdbf | 2919 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
2920 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
2921 | } | |
252b5132 RH |
2922 | else |
2923 | { | |
dd5724d5 | 2924 | BFD_ASSERT((h->got.offset & 1) == 0); |
6725bdbf AM |
2925 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
2926 | htab->sgot->contents + h->got.offset); | |
252b5132 RH |
2927 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
2928 | } | |
2929 | ||
0ac8d2ca AM |
2930 | loc = (Elf32_External_Rel *) htab->srelgot->contents; |
2931 | loc += htab->srelgot->reloc_count++; | |
2932 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
2933 | } |
2934 | ||
791987af | 2935 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
252b5132 | 2936 | { |
252b5132 | 2937 | Elf_Internal_Rel rel; |
0ac8d2ca | 2938 | Elf32_External_Rel *loc; |
252b5132 RH |
2939 | |
2940 | /* This symbol needs a copy reloc. Set it up. */ | |
2941 | ||
ffb2e45b AM |
2942 | if (h->dynindx == -1 |
2943 | || (h->root.type != bfd_link_hash_defined | |
2944 | && h->root.type != bfd_link_hash_defweak) | |
2945 | || htab->srelbss == NULL) | |
2946 | abort (); | |
252b5132 RH |
2947 | |
2948 | rel.r_offset = (h->root.u.def.value | |
2949 | + h->root.u.def.section->output_section->vma | |
2950 | + h->root.u.def.section->output_offset); | |
2951 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
0ac8d2ca AM |
2952 | loc = (Elf32_External_Rel *) htab->srelbss->contents; |
2953 | loc += htab->srelbss->reloc_count++; | |
2954 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
2955 | } |
2956 | ||
2957 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2958 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2959 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2960 | sym->st_shndx = SHN_ABS; | |
2961 | ||
2962 | return true; | |
2963 | } | |
2964 | ||
38701953 AM |
2965 | /* Used to decide how to sort relocs in an optimal manner for the |
2966 | dynamic linker, before writing them out. */ | |
2967 | ||
2968 | static enum elf_reloc_type_class | |
2969 | elf_i386_reloc_type_class (rela) | |
2970 | const Elf_Internal_Rela *rela; | |
2971 | { | |
2972 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
2973 | { | |
2974 | case R_386_RELATIVE: | |
2975 | return reloc_class_relative; | |
2976 | case R_386_JUMP_SLOT: | |
2977 | return reloc_class_plt; | |
2978 | case R_386_COPY: | |
2979 | return reloc_class_copy; | |
2980 | default: | |
2981 | return reloc_class_normal; | |
2982 | } | |
2983 | } | |
2984 | ||
252b5132 RH |
2985 | /* Finish up the dynamic sections. */ |
2986 | ||
2987 | static boolean | |
2988 | elf_i386_finish_dynamic_sections (output_bfd, info) | |
2989 | bfd *output_bfd; | |
2990 | struct bfd_link_info *info; | |
2991 | { | |
6725bdbf | 2992 | struct elf_i386_link_hash_table *htab; |
252b5132 | 2993 | bfd *dynobj; |
252b5132 RH |
2994 | asection *sdyn; |
2995 | ||
6725bdbf | 2996 | htab = elf_i386_hash_table (info); |
ebe50bae | 2997 | dynobj = htab->elf.dynobj; |
252b5132 RH |
2998 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
2999 | ||
ebe50bae | 3000 | if (htab->elf.dynamic_sections_created) |
252b5132 | 3001 | { |
252b5132 RH |
3002 | Elf32_External_Dyn *dyncon, *dynconend; |
3003 | ||
ffb2e45b AM |
3004 | if (sdyn == NULL || htab->sgot == NULL) |
3005 | abort (); | |
252b5132 RH |
3006 | |
3007 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
3008 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
3009 | for (; dyncon < dynconend; dyncon++) | |
3010 | { | |
3011 | Elf_Internal_Dyn dyn; | |
51b64d56 | 3012 | asection *s; |
252b5132 RH |
3013 | |
3014 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
3015 | ||
3016 | switch (dyn.d_tag) | |
3017 | { | |
3018 | default: | |
0ac8d2ca | 3019 | continue; |
252b5132 RH |
3020 | |
3021 | case DT_PLTGOT: | |
6725bdbf | 3022 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
6725bdbf AM |
3023 | break; |
3024 | ||
252b5132 | 3025 | case DT_JMPREL: |
6725bdbf | 3026 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
252b5132 RH |
3027 | break; |
3028 | ||
3029 | case DT_PLTRELSZ: | |
51b64d56 AM |
3030 | s = htab->srelplt->output_section; |
3031 | if (s->_cooked_size != 0) | |
3032 | dyn.d_un.d_val = s->_cooked_size; | |
252b5132 | 3033 | else |
51b64d56 | 3034 | dyn.d_un.d_val = s->_raw_size; |
252b5132 RH |
3035 | break; |
3036 | ||
3037 | case DT_RELSZ: | |
3038 | /* My reading of the SVR4 ABI indicates that the | |
3039 | procedure linkage table relocs (DT_JMPREL) should be | |
3040 | included in the overall relocs (DT_REL). This is | |
3041 | what Solaris does. However, UnixWare can not handle | |
3042 | that case. Therefore, we override the DT_RELSZ entry | |
3043 | here to make it not include the JMPREL relocs. Since | |
3044 | the linker script arranges for .rel.plt to follow all | |
3045 | other relocation sections, we don't have to worry | |
3046 | about changing the DT_REL entry. */ | |
6725bdbf | 3047 | if (htab->srelplt != NULL) |
252b5132 | 3048 | { |
51b64d56 AM |
3049 | s = htab->srelplt->output_section; |
3050 | if (s->_cooked_size != 0) | |
3051 | dyn.d_un.d_val -= s->_cooked_size; | |
252b5132 | 3052 | else |
51b64d56 | 3053 | dyn.d_un.d_val -= s->_raw_size; |
252b5132 | 3054 | } |
252b5132 RH |
3055 | break; |
3056 | } | |
0ac8d2ca AM |
3057 | |
3058 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
3059 | } |
3060 | ||
3061 | /* Fill in the first entry in the procedure linkage table. */ | |
6725bdbf | 3062 | if (htab->splt && htab->splt->_raw_size > 0) |
252b5132 RH |
3063 | { |
3064 | if (info->shared) | |
6725bdbf AM |
3065 | memcpy (htab->splt->contents, |
3066 | elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE); | |
252b5132 RH |
3067 | else |
3068 | { | |
6725bdbf AM |
3069 | memcpy (htab->splt->contents, |
3070 | elf_i386_plt0_entry, PLT_ENTRY_SIZE); | |
252b5132 | 3071 | bfd_put_32 (output_bfd, |
6725bdbf AM |
3072 | (htab->sgotplt->output_section->vma |
3073 | + htab->sgotplt->output_offset | |
3074 | + 4), | |
3075 | htab->splt->contents + 2); | |
252b5132 | 3076 | bfd_put_32 (output_bfd, |
6725bdbf AM |
3077 | (htab->sgotplt->output_section->vma |
3078 | + htab->sgotplt->output_offset | |
3079 | + 8), | |
3080 | htab->splt->contents + 8); | |
252b5132 RH |
3081 | } |
3082 | ||
3083 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
3084 | really seem like the right value. */ | |
6725bdbf AM |
3085 | elf_section_data (htab->splt->output_section) |
3086 | ->this_hdr.sh_entsize = 4; | |
252b5132 RH |
3087 | } |
3088 | } | |
3089 | ||
12d0ee4a | 3090 | if (htab->sgotplt) |
252b5132 | 3091 | { |
12d0ee4a AM |
3092 | /* Fill in the first three entries in the global offset table. */ |
3093 | if (htab->sgotplt->_raw_size > 0) | |
3094 | { | |
3095 | bfd_put_32 (output_bfd, | |
3096 | (sdyn == NULL ? (bfd_vma) 0 | |
3097 | : sdyn->output_section->vma + sdyn->output_offset), | |
3098 | htab->sgotplt->contents); | |
3099 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4); | |
3100 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
3101 | } | |
252b5132 | 3102 | |
12d0ee4a AM |
3103 | elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4; |
3104 | } | |
252b5132 RH |
3105 | return true; |
3106 | } | |
3107 | ||
3108 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vec | |
3109 | #define TARGET_LITTLE_NAME "elf32-i386" | |
3110 | #define ELF_ARCH bfd_arch_i386 | |
3111 | #define ELF_MACHINE_CODE EM_386 | |
3112 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
3113 | |
3114 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3115 | #define elf_backend_can_refcount 1 |
252b5132 RH |
3116 | #define elf_backend_want_got_plt 1 |
3117 | #define elf_backend_plt_readonly 1 | |
3118 | #define elf_backend_want_plt_sym 0 | |
3119 | #define elf_backend_got_header_size 12 | |
3120 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
3121 | ||
dd5724d5 AM |
3122 | #define elf_info_to_howto elf_i386_info_to_howto |
3123 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel | |
3124 | ||
13ae64f3 JJ |
3125 | #define bfd_elf32_mkobject elf_i386_mkobject |
3126 | #define elf_backend_object_p elf_i386_object_p | |
3127 | ||
dd5724d5 AM |
3128 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
3129 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
3130 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup | |
3131 | ||
3132 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
3133 | #define elf_backend_check_relocs elf_i386_check_relocs | |
0ac8d2ca | 3134 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
6725bdbf | 3135 | #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections |
0ac8d2ca | 3136 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
3137 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
3138 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
3139 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook | |
3140 | #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook | |
c5fccbec DJ |
3141 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
3142 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 3143 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
3144 | #define elf_backend_relocate_section elf_i386_relocate_section |
3145 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
dd5724d5 | 3146 | |
caf47ea6 | 3147 | #ifndef ELF32_I386_C_INCLUDED |
252b5132 | 3148 | #include "elf32-target.h" |
caf47ea6 | 3149 | #endif |