Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
7898deda | 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 |
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 *)); |
252b5132 RH |
49 | static boolean elf_i386_check_relocs |
50 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
51 | const Elf_Internal_Rela *)); | |
a7b97311 AM |
52 | static asection *elf_i386_gc_mark_hook |
53 | PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, | |
54 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
55 | static boolean elf_i386_gc_sweep_hook | |
56 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
57 | const Elf_Internal_Rela *)); | |
252b5132 RH |
58 | static boolean elf_i386_adjust_dynamic_symbol |
59 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
0c715baa AM |
60 | static boolean allocate_dynrelocs |
61 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
62 | static boolean readonly_dynrelocs | |
6725bdbf | 63 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
38701953 AM |
64 | static boolean elf_i386_fake_sections |
65 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *)); | |
252b5132 RH |
66 | static boolean elf_i386_size_dynamic_sections |
67 | PARAMS ((bfd *, struct bfd_link_info *)); | |
68 | static boolean elf_i386_relocate_section | |
69 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
70 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
71 | static boolean elf_i386_finish_dynamic_symbol | |
72 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, | |
73 | Elf_Internal_Sym *)); | |
f51e552e AM |
74 | static enum elf_reloc_type_class elf_i386_reloc_type_class |
75 | PARAMS ((const Elf_Internal_Rela *)); | |
38701953 AM |
76 | static boolean elf_i386_finish_dynamic_sections |
77 | PARAMS ((bfd *, struct bfd_link_info *)); | |
252b5132 RH |
78 | |
79 | #define USE_REL 1 /* 386 uses REL relocations instead of RELA */ | |
80 | ||
81 | #include "elf/i386.h" | |
82 | ||
83 | static reloc_howto_type elf_howto_table[]= | |
84 | { | |
1b452ec6 AM |
85 | HOWTO(R_386_NONE, 0, 0, 0, false, 0, complain_overflow_bitfield, |
86 | bfd_elf_generic_reloc, "R_386_NONE", | |
87 | true, 0x00000000, 0x00000000, false), | |
88 | HOWTO(R_386_32, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
89 | bfd_elf_generic_reloc, "R_386_32", | |
90 | true, 0xffffffff, 0xffffffff, false), | |
91 | HOWTO(R_386_PC32, 0, 2, 32, true, 0, complain_overflow_bitfield, | |
92 | bfd_elf_generic_reloc, "R_386_PC32", | |
93 | true, 0xffffffff, 0xffffffff, true), | |
94 | HOWTO(R_386_GOT32, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
95 | bfd_elf_generic_reloc, "R_386_GOT32", | |
96 | true, 0xffffffff, 0xffffffff, false), | |
97 | HOWTO(R_386_PLT32, 0, 2, 32, true, 0, complain_overflow_bitfield, | |
98 | bfd_elf_generic_reloc, "R_386_PLT32", | |
99 | true, 0xffffffff, 0xffffffff, true), | |
100 | HOWTO(R_386_COPY, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
101 | bfd_elf_generic_reloc, "R_386_COPY", | |
102 | true, 0xffffffff, 0xffffffff, false), | |
103 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
104 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", | |
105 | true, 0xffffffff, 0xffffffff, false), | |
106 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
107 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", | |
108 | true, 0xffffffff, 0xffffffff, false), | |
109 | HOWTO(R_386_RELATIVE, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
110 | bfd_elf_generic_reloc, "R_386_RELATIVE", | |
111 | true, 0xffffffff, 0xffffffff, false), | |
112 | HOWTO(R_386_GOTOFF, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
113 | bfd_elf_generic_reloc, "R_386_GOTOFF", | |
114 | true, 0xffffffff, 0xffffffff, false), | |
115 | HOWTO(R_386_GOTPC, 0, 2, 32, true, 0, complain_overflow_bitfield, | |
116 | bfd_elf_generic_reloc, "R_386_GOTPC", | |
117 | true, 0xffffffff, 0xffffffff, true), | |
118 | ||
dc47f327 AM |
119 | /* We have a gap in the reloc numbers here. |
120 | R_386_standard counts the number up to this point, and | |
121 | R_386_ext_offset is the value to subtract from a reloc type of | |
122 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
1b452ec6 AM |
123 | #define R_386_standard ((unsigned int) R_386_GOTPC + 1) |
124 | #define R_386_ext_offset ((unsigned int) R_386_16 - R_386_standard) | |
125 | ||
252b5132 | 126 | /* The remaining relocs are a GNU extension. */ |
1b452ec6 AM |
127 | HOWTO(R_386_16, 0, 1, 16, false, 0, complain_overflow_bitfield, |
128 | bfd_elf_generic_reloc, "R_386_16", | |
129 | true, 0xffff, 0xffff, false), | |
130 | HOWTO(R_386_PC16, 0, 1, 16, true, 0, complain_overflow_bitfield, | |
131 | bfd_elf_generic_reloc, "R_386_PC16", | |
132 | true, 0xffff, 0xffff, true), | |
133 | HOWTO(R_386_8, 0, 0, 8, false, 0, complain_overflow_bitfield, | |
134 | bfd_elf_generic_reloc, "R_386_8", | |
135 | true, 0xff, 0xff, false), | |
136 | HOWTO(R_386_PC8, 0, 0, 8, true, 0, complain_overflow_signed, | |
137 | bfd_elf_generic_reloc, "R_386_PC8", | |
dc47f327 AM |
138 | true, 0xff, 0xff, true), |
139 | ||
140 | /* Another gap. */ | |
141 | #define R_386_ext ((unsigned int) R_386_PC8 + 1 - R_386_ext_offset) | |
142 | #define R_386_vt_offset ((unsigned int) R_386_GNU_VTINHERIT - R_386_ext) | |
252b5132 RH |
143 | |
144 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
145 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
146 | 0, /* rightshift */ | |
147 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
148 | 0, /* bitsize */ | |
149 | false, /* pc_relative */ | |
150 | 0, /* bitpos */ | |
151 | complain_overflow_dont, /* complain_on_overflow */ | |
152 | NULL, /* special_function */ | |
153 | "R_386_GNU_VTINHERIT", /* name */ | |
154 | false, /* partial_inplace */ | |
155 | 0, /* src_mask */ | |
156 | 0, /* dst_mask */ | |
dc47f327 | 157 | false), |
252b5132 RH |
158 | |
159 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
160 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
161 | 0, /* rightshift */ | |
162 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
163 | 0, /* bitsize */ | |
164 | false, /* pc_relative */ | |
165 | 0, /* bitpos */ | |
166 | complain_overflow_dont, /* complain_on_overflow */ | |
167 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
168 | "R_386_GNU_VTENTRY", /* name */ | |
169 | false, /* partial_inplace */ | |
170 | 0, /* src_mask */ | |
171 | 0, /* dst_mask */ | |
dc47f327 AM |
172 | false) |
173 | ||
174 | #define R_386_vt ((unsigned int) R_386_GNU_VTENTRY + 1 - R_386_vt_offset) | |
175 | ||
176 | }; | |
177 | ||
252b5132 RH |
178 | #ifdef DEBUG_GEN_RELOC |
179 | #define TRACE(str) fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
180 | #else | |
181 | #define TRACE(str) | |
182 | #endif | |
183 | ||
184 | static reloc_howto_type * | |
185 | elf_i386_reloc_type_lookup (abfd, code) | |
7442e600 | 186 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
187 | bfd_reloc_code_real_type code; |
188 | { | |
189 | switch (code) | |
190 | { | |
191 | case BFD_RELOC_NONE: | |
192 | TRACE ("BFD_RELOC_NONE"); | |
1b452ec6 | 193 | return &elf_howto_table[(unsigned int) R_386_NONE ]; |
252b5132 RH |
194 | |
195 | case BFD_RELOC_32: | |
196 | TRACE ("BFD_RELOC_32"); | |
1b452ec6 | 197 | return &elf_howto_table[(unsigned int) R_386_32 ]; |
252b5132 RH |
198 | |
199 | case BFD_RELOC_CTOR: | |
200 | TRACE ("BFD_RELOC_CTOR"); | |
1b452ec6 | 201 | return &elf_howto_table[(unsigned int) R_386_32 ]; |
252b5132 RH |
202 | |
203 | case BFD_RELOC_32_PCREL: | |
204 | TRACE ("BFD_RELOC_PC32"); | |
1b452ec6 | 205 | return &elf_howto_table[(unsigned int) R_386_PC32 ]; |
252b5132 RH |
206 | |
207 | case BFD_RELOC_386_GOT32: | |
208 | TRACE ("BFD_RELOC_386_GOT32"); | |
1b452ec6 | 209 | return &elf_howto_table[(unsigned int) R_386_GOT32 ]; |
252b5132 RH |
210 | |
211 | case BFD_RELOC_386_PLT32: | |
212 | TRACE ("BFD_RELOC_386_PLT32"); | |
1b452ec6 | 213 | return &elf_howto_table[(unsigned int) R_386_PLT32 ]; |
252b5132 RH |
214 | |
215 | case BFD_RELOC_386_COPY: | |
216 | TRACE ("BFD_RELOC_386_COPY"); | |
1b452ec6 | 217 | return &elf_howto_table[(unsigned int) R_386_COPY ]; |
252b5132 RH |
218 | |
219 | case BFD_RELOC_386_GLOB_DAT: | |
220 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
1b452ec6 | 221 | return &elf_howto_table[(unsigned int) R_386_GLOB_DAT ]; |
252b5132 RH |
222 | |
223 | case BFD_RELOC_386_JUMP_SLOT: | |
224 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
1b452ec6 | 225 | return &elf_howto_table[(unsigned int) R_386_JUMP_SLOT ]; |
252b5132 RH |
226 | |
227 | case BFD_RELOC_386_RELATIVE: | |
228 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
1b452ec6 | 229 | return &elf_howto_table[(unsigned int) R_386_RELATIVE ]; |
252b5132 RH |
230 | |
231 | case BFD_RELOC_386_GOTOFF: | |
232 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
1b452ec6 | 233 | return &elf_howto_table[(unsigned int) R_386_GOTOFF ]; |
252b5132 RH |
234 | |
235 | case BFD_RELOC_386_GOTPC: | |
236 | TRACE ("BFD_RELOC_386_GOTPC"); | |
1b452ec6 | 237 | return &elf_howto_table[(unsigned int) R_386_GOTPC ]; |
252b5132 RH |
238 | |
239 | /* The remaining relocs are a GNU extension. */ | |
240 | case BFD_RELOC_16: | |
241 | TRACE ("BFD_RELOC_16"); | |
1b452ec6 | 242 | return &elf_howto_table[(unsigned int) R_386_16 - R_386_ext_offset]; |
252b5132 RH |
243 | |
244 | case BFD_RELOC_16_PCREL: | |
245 | TRACE ("BFD_RELOC_16_PCREL"); | |
1b452ec6 | 246 | return &elf_howto_table[(unsigned int) R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
247 | |
248 | case BFD_RELOC_8: | |
249 | TRACE ("BFD_RELOC_8"); | |
1b452ec6 | 250 | return &elf_howto_table[(unsigned int) R_386_8 - R_386_ext_offset]; |
252b5132 RH |
251 | |
252 | case BFD_RELOC_8_PCREL: | |
253 | TRACE ("BFD_RELOC_8_PCREL"); | |
1b452ec6 | 254 | return &elf_howto_table[(unsigned int) R_386_PC8 - R_386_ext_offset]; |
252b5132 RH |
255 | |
256 | case BFD_RELOC_VTABLE_INHERIT: | |
257 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
dc47f327 AM |
258 | return &elf_howto_table[(unsigned int) R_386_GNU_VTINHERIT |
259 | - R_386_vt_offset]; | |
252b5132 RH |
260 | |
261 | case BFD_RELOC_VTABLE_ENTRY: | |
262 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
dc47f327 AM |
263 | return &elf_howto_table[(unsigned int) R_386_GNU_VTENTRY |
264 | - R_386_vt_offset]; | |
252b5132 RH |
265 | |
266 | default: | |
267 | break; | |
268 | } | |
269 | ||
270 | TRACE ("Unknown"); | |
271 | return 0; | |
272 | } | |
273 | ||
274 | static void | |
275 | elf_i386_info_to_howto (abfd, cache_ptr, dst) | |
7442e600 ILT |
276 | bfd *abfd ATTRIBUTE_UNUSED; |
277 | arelent *cache_ptr ATTRIBUTE_UNUSED; | |
278 | Elf32_Internal_Rela *dst ATTRIBUTE_UNUSED; | |
252b5132 RH |
279 | { |
280 | abort (); | |
281 | } | |
282 | ||
283 | static void | |
284 | elf_i386_info_to_howto_rel (abfd, cache_ptr, dst) | |
7442e600 | 285 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
286 | arelent *cache_ptr; |
287 | Elf32_Internal_Rel *dst; | |
288 | { | |
dc47f327 AM |
289 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); |
290 | unsigned int indx; | |
291 | ||
292 | if ((indx = r_type) >= R_386_standard | |
293 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
294 | >= R_386_ext - R_386_standard) | |
295 | && ((indx = r_type - R_386_vt_offset) - R_386_ext | |
296 | >= R_386_vt - R_386_ext)) | |
252b5132 | 297 | { |
dc47f327 | 298 | (*_bfd_error_handler) (_("%s: invalid relocation type %d"), |
8f615d07 | 299 | bfd_archive_filename (abfd), (int) r_type); |
dc47f327 | 300 | indx = (unsigned int) R_386_NONE; |
252b5132 | 301 | } |
dc47f327 | 302 | cache_ptr->howto = &elf_howto_table[indx]; |
252b5132 RH |
303 | } |
304 | ||
305 | /* Return whether a symbol name implies a local label. The UnixWare | |
306 | 2.1 cc generates temporary symbols that start with .X, so we | |
307 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
308 | If so, we should move the .X recognition into | |
309 | _bfd_elf_is_local_label_name. */ | |
310 | ||
311 | static boolean | |
312 | elf_i386_is_local_label_name (abfd, name) | |
313 | bfd *abfd; | |
314 | const char *name; | |
315 | { | |
316 | if (name[0] == '.' && name[1] == 'X') | |
317 | return true; | |
318 | ||
319 | return _bfd_elf_is_local_label_name (abfd, name); | |
320 | } | |
321 | \f | |
38701953 AM |
322 | /* Support for core dump NOTE sections. */ |
323 | static boolean | |
324 | elf_i386_grok_prstatus (abfd, note) | |
325 | bfd *abfd; | |
326 | Elf_Internal_Note *note; | |
327 | { | |
328 | int offset; | |
329 | size_t raw_size; | |
330 | ||
331 | switch (note->descsz) | |
332 | { | |
333 | default: | |
334 | return false; | |
335 | ||
336 | case 144: /* Linux/i386 */ | |
337 | /* pr_cursig */ | |
338 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
339 | ||
340 | /* pr_pid */ | |
341 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
342 | ||
343 | /* pr_reg */ | |
344 | offset = 72; | |
345 | raw_size = 68; | |
346 | ||
347 | break; | |
348 | } | |
349 | ||
350 | /* Make a ".reg/999" section. */ | |
351 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
352 | raw_size, note->descpos + offset); | |
353 | } | |
354 | ||
355 | static boolean | |
356 | elf_i386_grok_psinfo (abfd, note) | |
357 | bfd *abfd; | |
358 | Elf_Internal_Note *note; | |
359 | { | |
360 | switch (note->descsz) | |
361 | { | |
362 | default: | |
363 | return false; | |
364 | ||
fd29389c | 365 | case 124: /* Linux/i386 elf_prpsinfo */ |
38701953 AM |
366 | elf_tdata (abfd)->core_program |
367 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); | |
368 | elf_tdata (abfd)->core_command | |
369 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); | |
370 | } | |
371 | ||
372 | /* Note that for some reason, a spurious space is tacked | |
373 | onto the end of the args in some (at least one anyway) | |
374 | implementations, so strip it off if it exists. */ | |
375 | ||
376 | { | |
377 | char *command = elf_tdata (abfd)->core_command; | |
378 | int n = strlen (command); | |
379 | ||
380 | if (0 < n && command[n - 1] == ' ') | |
381 | command[n - 1] = '\0'; | |
382 | } | |
383 | ||
384 | return true; | |
385 | } | |
386 | \f | |
387 | /* Functions for the i386 ELF linker. | |
388 | ||
389 | In order to gain some understanding of code in this file without | |
390 | knowing all the intricate details of the linker, note the | |
391 | following: | |
392 | ||
393 | Functions named elf_i386_* are called by external routines, other | |
394 | functions are only called locally. elf_i386_* functions appear | |
395 | in this file more or less in the order in which they are called | |
396 | from external routines. eg. elf_i386_check_relocs is called | |
397 | early in the link process, elf_i386_finish_dynamic_sections is | |
398 | one of the last functions. */ | |
399 | ||
252b5132 RH |
400 | |
401 | /* The name of the dynamic interpreter. This is put in the .interp | |
402 | section. */ | |
403 | ||
404 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
405 | ||
406 | /* The size in bytes of an entry in the procedure linkage table. */ | |
407 | ||
408 | #define PLT_ENTRY_SIZE 16 | |
409 | ||
410 | /* The first entry in an absolute procedure linkage table looks like | |
411 | this. See the SVR4 ABI i386 supplement to see how this works. */ | |
412 | ||
413 | static const bfd_byte elf_i386_plt0_entry[PLT_ENTRY_SIZE] = | |
414 | { | |
415 | 0xff, 0x35, /* pushl contents of address */ | |
416 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
417 | 0xff, 0x25, /* jmp indirect */ | |
418 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
419 | 0, 0, 0, 0 /* pad out to 16 bytes. */ | |
420 | }; | |
421 | ||
422 | /* Subsequent entries in an absolute procedure linkage table look like | |
423 | this. */ | |
424 | ||
425 | static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] = | |
426 | { | |
427 | 0xff, 0x25, /* jmp indirect */ | |
428 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
429 | 0x68, /* pushl immediate */ | |
430 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
431 | 0xe9, /* jmp relative */ | |
432 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
433 | }; | |
434 | ||
435 | /* The first entry in a PIC procedure linkage table look like this. */ | |
436 | ||
437 | static const bfd_byte elf_i386_pic_plt0_entry[PLT_ENTRY_SIZE] = | |
438 | { | |
439 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
440 | 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */ | |
441 | 0, 0, 0, 0 /* pad out to 16 bytes. */ | |
442 | }; | |
443 | ||
444 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
445 | ||
446 | static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] = | |
447 | { | |
448 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
449 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
450 | 0x68, /* pushl immediate */ | |
451 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
452 | 0xe9, /* jmp relative */ | |
453 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
454 | }; | |
455 | ||
456 | /* The i386 linker needs to keep track of the number of relocs that it | |
ffb2e45b AM |
457 | decides to copy as dynamic relocs in check_relocs for each symbol. |
458 | This is so that it can later discard them if they are found to be | |
459 | unnecessary. We store the information in a field extending the | |
460 | regular ELF linker hash table. */ | |
252b5132 | 461 | |
ffb2e45b | 462 | struct elf_i386_dyn_relocs |
252b5132 | 463 | { |
ffb2e45b | 464 | struct elf_i386_dyn_relocs *next; |
0c715baa AM |
465 | |
466 | /* The input section of the reloc. */ | |
467 | asection *sec; | |
468 | ||
469 | /* Total number of relocs copied for the input section. */ | |
252b5132 | 470 | bfd_size_type count; |
0c715baa AM |
471 | |
472 | /* Number of pc-relative relocs copied for the input section. */ | |
473 | bfd_size_type pc_count; | |
252b5132 RH |
474 | }; |
475 | ||
476 | /* i386 ELF linker hash entry. */ | |
477 | ||
478 | struct elf_i386_link_hash_entry | |
479 | { | |
ebe50bae | 480 | struct elf_link_hash_entry elf; |
252b5132 | 481 | |
0c715baa | 482 | /* Track dynamic relocs copied for this symbol. */ |
ffb2e45b | 483 | struct elf_i386_dyn_relocs *dyn_relocs; |
252b5132 RH |
484 | }; |
485 | ||
486 | /* i386 ELF linker hash table. */ | |
487 | ||
488 | struct elf_i386_link_hash_table | |
489 | { | |
ebe50bae | 490 | struct elf_link_hash_table elf; |
252b5132 | 491 | |
6725bdbf AM |
492 | /* Short-cuts to get to dynamic linker sections. */ |
493 | asection *sgot; | |
494 | asection *sgotplt; | |
495 | asection *srelgot; | |
496 | asection *splt; | |
497 | asection *srelplt; | |
498 | asection *sdynbss; | |
499 | asection *srelbss; | |
ec338859 AM |
500 | |
501 | /* Small local sym to section mapping cache. */ | |
502 | struct sym_sec_cache sym_sec; | |
6725bdbf | 503 | }; |
252b5132 RH |
504 | |
505 | /* Get the i386 ELF linker hash table from a link_info structure. */ | |
506 | ||
507 | #define elf_i386_hash_table(p) \ | |
508 | ((struct elf_i386_link_hash_table *) ((p)->hash)) | |
509 | ||
510 | /* Create an entry in an i386 ELF linker hash table. */ | |
511 | ||
512 | static struct bfd_hash_entry * | |
38701953 | 513 | link_hash_newfunc (entry, table, string) |
252b5132 RH |
514 | struct bfd_hash_entry *entry; |
515 | struct bfd_hash_table *table; | |
516 | const char *string; | |
517 | { | |
252b5132 RH |
518 | /* Allocate the structure if it has not already been allocated by a |
519 | subclass. */ | |
ebe50bae AM |
520 | if (entry == NULL) |
521 | { | |
522 | entry = bfd_hash_allocate (table, | |
523 | sizeof (struct elf_i386_link_hash_entry)); | |
524 | if (entry == NULL) | |
525 | return entry; | |
526 | } | |
252b5132 RH |
527 | |
528 | /* Call the allocation method of the superclass. */ | |
ebe50bae AM |
529 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
530 | if (entry != NULL) | |
252b5132 | 531 | { |
ebe50bae AM |
532 | struct elf_i386_link_hash_entry *eh; |
533 | ||
534 | eh = (struct elf_i386_link_hash_entry *) entry; | |
535 | eh->dyn_relocs = NULL; | |
252b5132 RH |
536 | } |
537 | ||
ebe50bae | 538 | return entry; |
252b5132 RH |
539 | } |
540 | ||
541 | /* Create an i386 ELF linker hash table. */ | |
542 | ||
543 | static struct bfd_link_hash_table * | |
544 | elf_i386_link_hash_table_create (abfd) | |
545 | bfd *abfd; | |
546 | { | |
547 | struct elf_i386_link_hash_table *ret; | |
dc810e39 | 548 | bfd_size_type amt = sizeof (struct elf_i386_link_hash_table); |
252b5132 | 549 | |
dc810e39 | 550 | ret = (struct elf_i386_link_hash_table *) bfd_alloc (abfd, amt); |
ebe50bae | 551 | if (ret == NULL) |
252b5132 RH |
552 | return NULL; |
553 | ||
ebe50bae | 554 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
252b5132 RH |
555 | { |
556 | bfd_release (abfd, ret); | |
557 | return NULL; | |
558 | } | |
559 | ||
6725bdbf AM |
560 | ret->sgot = NULL; |
561 | ret->sgotplt = NULL; | |
562 | ret->srelgot = NULL; | |
563 | ret->splt = NULL; | |
564 | ret->srelplt = NULL; | |
565 | ret->sdynbss = NULL; | |
566 | ret->srelbss = NULL; | |
ec338859 | 567 | ret->sym_sec.abfd = NULL; |
6725bdbf | 568 | |
ebe50bae | 569 | return &ret->elf.root; |
252b5132 RH |
570 | } |
571 | ||
6725bdbf AM |
572 | /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up |
573 | shortcuts to them in our hash table. */ | |
574 | ||
575 | static boolean | |
576 | create_got_section (dynobj, info) | |
577 | bfd *dynobj; | |
578 | struct bfd_link_info *info; | |
579 | { | |
580 | struct elf_i386_link_hash_table *htab; | |
581 | ||
582 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
583 | return false; | |
584 | ||
585 | htab = elf_i386_hash_table (info); | |
586 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
587 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
588 | if (!htab->sgot || !htab->sgotplt) | |
589 | abort (); | |
590 | ||
591 | htab->srelgot = bfd_make_section (dynobj, ".rel.got"); | |
592 | if (htab->srelgot == NULL | |
593 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
594 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
595 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
596 | | SEC_READONLY)) | |
597 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) | |
598 | return false; | |
599 | return true; | |
600 | } | |
601 | ||
602 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and | |
603 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
604 | hash table. */ | |
605 | ||
606 | static boolean | |
607 | elf_i386_create_dynamic_sections (dynobj, info) | |
608 | bfd *dynobj; | |
609 | struct bfd_link_info *info; | |
610 | { | |
611 | struct elf_i386_link_hash_table *htab; | |
612 | ||
613 | htab = elf_i386_hash_table (info); | |
614 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
615 | return false; | |
616 | ||
617 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
618 | return false; | |
619 | ||
620 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
621 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
622 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
623 | if (!info->shared) | |
624 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
625 | ||
626 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
627 | || (!info->shared && !htab->srelbss)) | |
628 | abort (); | |
629 | ||
630 | return true; | |
631 | } | |
632 | ||
ebe50bae AM |
633 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
634 | ||
51b64d56 | 635 | static void |
ebe50bae AM |
636 | elf_i386_copy_indirect_symbol (dir, ind) |
637 | struct elf_link_hash_entry *dir, *ind; | |
638 | { | |
639 | struct elf_i386_link_hash_entry *edir, *eind; | |
640 | ||
641 | edir = (struct elf_i386_link_hash_entry *) dir; | |
642 | eind = (struct elf_i386_link_hash_entry *) ind; | |
643 | ||
bbd7ec4a | 644 | if (eind->dyn_relocs != NULL) |
ebe50bae | 645 | { |
bbd7ec4a AM |
646 | if (edir->dyn_relocs != NULL) |
647 | { | |
648 | struct elf_i386_dyn_relocs **pp; | |
649 | struct elf_i386_dyn_relocs *p; | |
650 | ||
1e370bd2 | 651 | if (ind->root.type == bfd_link_hash_indirect) |
bbd7ec4a AM |
652 | abort (); |
653 | ||
654 | /* Add reloc counts against the weak sym to the strong sym | |
655 | list. Merge any entries against the same section. */ | |
656 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
657 | { | |
658 | struct elf_i386_dyn_relocs *q; | |
659 | ||
660 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
661 | if (q->sec == p->sec) | |
662 | { | |
663 | q->pc_count += p->pc_count; | |
664 | q->count += p->count; | |
665 | *pp = p->next; | |
666 | break; | |
667 | } | |
668 | if (q == NULL) | |
669 | pp = &p->next; | |
670 | } | |
671 | *pp = edir->dyn_relocs; | |
672 | } | |
673 | ||
ebe50bae AM |
674 | edir->dyn_relocs = eind->dyn_relocs; |
675 | eind->dyn_relocs = NULL; | |
676 | } | |
ebe50bae AM |
677 | |
678 | _bfd_elf_link_hash_copy_indirect (dir, ind); | |
679 | } | |
680 | ||
252b5132 | 681 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
682 | calculate needed space in the global offset table, procedure linkage |
683 | table, and dynamic reloc sections. */ | |
252b5132 RH |
684 | |
685 | static boolean | |
686 | elf_i386_check_relocs (abfd, info, sec, relocs) | |
687 | bfd *abfd; | |
688 | struct bfd_link_info *info; | |
689 | asection *sec; | |
690 | const Elf_Internal_Rela *relocs; | |
691 | { | |
6725bdbf | 692 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
693 | Elf_Internal_Shdr *symtab_hdr; |
694 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
695 | const Elf_Internal_Rela *rel; |
696 | const Elf_Internal_Rela *rel_end; | |
252b5132 RH |
697 | asection *sreloc; |
698 | ||
699 | if (info->relocateable) | |
700 | return true; | |
701 | ||
6725bdbf | 702 | htab = elf_i386_hash_table (info); |
252b5132 RH |
703 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
704 | sym_hashes = elf_sym_hashes (abfd); | |
252b5132 | 705 | |
252b5132 RH |
706 | sreloc = NULL; |
707 | ||
708 | rel_end = relocs + sec->reloc_count; | |
709 | for (rel = relocs; rel < rel_end; rel++) | |
710 | { | |
711 | unsigned long r_symndx; | |
712 | struct elf_link_hash_entry *h; | |
713 | ||
714 | r_symndx = ELF32_R_SYM (rel->r_info); | |
715 | ||
d9bc7a44 | 716 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 717 | { |
8f615d07 AM |
718 | (*_bfd_error_handler) (_("%s: bad symbol index: %d"), |
719 | bfd_archive_filename (abfd), | |
720 | r_symndx); | |
f5f31454 L |
721 | return false; |
722 | } | |
723 | ||
252b5132 RH |
724 | if (r_symndx < symtab_hdr->sh_info) |
725 | h = NULL; | |
726 | else | |
727 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
728 | ||
252b5132 RH |
729 | switch (ELF32_R_TYPE (rel->r_info)) |
730 | { | |
731 | case R_386_GOT32: | |
732 | /* This symbol requires a global offset table entry. */ | |
252b5132 RH |
733 | if (h != NULL) |
734 | { | |
51b64d56 | 735 | h->got.refcount += 1; |
252b5132 RH |
736 | } |
737 | else | |
738 | { | |
0ac8d2ca AM |
739 | bfd_signed_vma *local_got_refcounts; |
740 | ||
83be169b | 741 | /* This is a global offset table entry for a local symbol. */ |
0ac8d2ca | 742 | local_got_refcounts = elf_local_got_refcounts (abfd); |
dd5724d5 | 743 | if (local_got_refcounts == NULL) |
252b5132 | 744 | { |
dc810e39 | 745 | bfd_size_type size; |
252b5132 | 746 | |
dc810e39 AM |
747 | size = symtab_hdr->sh_info; |
748 | size *= sizeof (bfd_signed_vma); | |
dd5724d5 | 749 | local_got_refcounts = ((bfd_signed_vma *) |
ebe50bae | 750 | bfd_zalloc (abfd, size)); |
dd5724d5 | 751 | if (local_got_refcounts == NULL) |
252b5132 | 752 | return false; |
dd5724d5 | 753 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
252b5132 | 754 | } |
ebe50bae | 755 | local_got_refcounts[r_symndx] += 1; |
252b5132 | 756 | } |
0ac8d2ca AM |
757 | /* Fall through */ |
758 | ||
759 | case R_386_GOTOFF: | |
760 | case R_386_GOTPC: | |
761 | if (htab->sgot == NULL) | |
762 | { | |
763 | if (htab->elf.dynobj == NULL) | |
764 | htab->elf.dynobj = abfd; | |
765 | if (!create_got_section (htab->elf.dynobj, info)) | |
766 | return false; | |
767 | } | |
252b5132 RH |
768 | break; |
769 | ||
770 | case R_386_PLT32: | |
771 | /* This symbol requires a procedure linkage table entry. We | |
83be169b AM |
772 | actually build the entry in adjust_dynamic_symbol, |
773 | because this might be a case of linking PIC code which is | |
774 | never referenced by a dynamic object, in which case we | |
775 | don't need to generate a procedure linkage table entry | |
776 | after all. */ | |
252b5132 RH |
777 | |
778 | /* If this is a local symbol, we resolve it directly without | |
83be169b | 779 | creating a procedure linkage table entry. */ |
252b5132 RH |
780 | if (h == NULL) |
781 | continue; | |
782 | ||
51b64d56 AM |
783 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
784 | h->plt.refcount += 1; | |
252b5132 RH |
785 | break; |
786 | ||
787 | case R_386_32: | |
788 | case R_386_PC32: | |
12d0ee4a | 789 | if (h != NULL && !info->shared) |
6725bdbf | 790 | { |
12d0ee4a | 791 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
792 | need a copy reloc. We can't check reliably at this |
793 | stage whether the section is read-only, as input | |
794 | sections have not yet been mapped to output sections. | |
795 | Tentatively set the flag for now, and correct in | |
796 | adjust_dynamic_symbol. */ | |
797 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
12d0ee4a AM |
798 | |
799 | /* We may need a .plt entry if the function this reloc | |
800 | refers to is in a shared lib. */ | |
51b64d56 | 801 | h->plt.refcount += 1; |
6725bdbf | 802 | } |
7843f00e | 803 | |
252b5132 | 804 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
805 | against a global symbol, or a non PC relative reloc |
806 | against a local symbol, then we need to copy the reloc | |
807 | into the shared library. However, if we are linking with | |
808 | -Bsymbolic, we do not need to copy a reloc against a | |
809 | global symbol which is defined in an object we are | |
810 | including in the link (i.e., DEF_REGULAR is set). At | |
811 | this point we have not seen all the input files, so it is | |
812 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
813 | later (it is never cleared). In case of a weak definition, |
814 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 815 | a shared library. We account for that possibility below by |
1f655a09 L |
816 | storing information in the relocs_copied field of the hash |
817 | table entry. A similar situation occurs when creating | |
818 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 819 | symbol local. |
56882138 | 820 | |
12d0ee4a AM |
821 | If on the other hand, we are creating an executable, we |
822 | may need to keep relocations for symbols satisfied by a | |
823 | dynamic library if we manage to avoid copy relocs for the | |
824 | symbol. */ | |
825 | if ((info->shared | |
826 | && (sec->flags & SEC_ALLOC) != 0 | |
827 | && (ELF32_R_TYPE (rel->r_info) != R_386_PC32 | |
828 | || (h != NULL | |
829 | && (! info->symbolic | |
830 | || h->root.type == bfd_link_hash_defweak | |
831 | || (h->elf_link_hash_flags | |
832 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
833 | || (!info->shared | |
834 | && (sec->flags & SEC_ALLOC) != 0 | |
835 | && h != NULL | |
12d0ee4a AM |
836 | && (h->root.type == bfd_link_hash_defweak |
837 | || (h->elf_link_hash_flags | |
838 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
252b5132 | 839 | { |
ec338859 AM |
840 | struct elf_i386_dyn_relocs *p; |
841 | struct elf_i386_dyn_relocs **head; | |
842 | ||
12d0ee4a AM |
843 | /* We must copy these reloc types into the output file. |
844 | Create a reloc section in dynobj and make room for | |
845 | this reloc. */ | |
252b5132 RH |
846 | if (sreloc == NULL) |
847 | { | |
848 | const char *name; | |
0ac8d2ca | 849 | bfd *dynobj; |
252b5132 RH |
850 | |
851 | name = (bfd_elf_string_from_elf_section | |
852 | (abfd, | |
853 | elf_elfheader (abfd)->e_shstrndx, | |
854 | elf_section_data (sec)->rel_hdr.sh_name)); | |
855 | if (name == NULL) | |
856 | return false; | |
857 | ||
c8492176 L |
858 | if (strncmp (name, ".rel", 4) != 0 |
859 | || strcmp (bfd_get_section_name (abfd, sec), | |
860 | name + 4) != 0) | |
861 | { | |
0c715baa AM |
862 | (*_bfd_error_handler) |
863 | (_("%s: bad relocation section name `%s\'"), | |
864 | bfd_archive_filename (abfd), name); | |
f5f31454 | 865 | } |
252b5132 | 866 | |
0ac8d2ca AM |
867 | if (htab->elf.dynobj == NULL) |
868 | htab->elf.dynobj = abfd; | |
869 | ||
870 | dynobj = htab->elf.dynobj; | |
252b5132 RH |
871 | sreloc = bfd_get_section_by_name (dynobj, name); |
872 | if (sreloc == NULL) | |
873 | { | |
874 | flagword flags; | |
875 | ||
876 | sreloc = bfd_make_section (dynobj, name); | |
877 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
878 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
879 | if ((sec->flags & SEC_ALLOC) != 0) | |
880 | flags |= SEC_ALLOC | SEC_LOAD; | |
881 | if (sreloc == NULL | |
882 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
883 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
884 | return false; | |
885 | } | |
0c715baa | 886 | elf_section_data (sec)->sreloc = sreloc; |
252b5132 RH |
887 | } |
888 | ||
0c715baa AM |
889 | /* If this is a global symbol, we count the number of |
890 | relocations we need for this symbol. */ | |
891 | if (h != NULL) | |
252b5132 | 892 | { |
ec338859 | 893 | head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs; |
0c715baa AM |
894 | } |
895 | else | |
896 | { | |
ec338859 AM |
897 | /* Track dynamic relocs needed for local syms too. |
898 | We really need local syms available to do this | |
899 | easily. Oh well. */ | |
900 | ||
901 | asection *s; | |
902 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
903 | sec, r_symndx); | |
904 | if (s == NULL) | |
905 | return false; | |
906 | ||
907 | head = ((struct elf_i386_dyn_relocs **) | |
908 | &elf_section_data (s)->local_dynrel); | |
909 | } | |
910 | ||
911 | p = *head; | |
912 | if (p == NULL || p->sec != sec) | |
913 | { | |
914 | bfd_size_type amt = sizeof *p; | |
915 | p = ((struct elf_i386_dyn_relocs *) | |
916 | bfd_alloc (htab->elf.dynobj, amt)); | |
917 | if (p == NULL) | |
918 | return false; | |
919 | p->next = *head; | |
920 | *head = p; | |
921 | p->sec = sec; | |
922 | p->count = 0; | |
923 | p->pc_count = 0; | |
252b5132 | 924 | } |
ec338859 AM |
925 | |
926 | p->count += 1; | |
927 | if (ELF32_R_TYPE (rel->r_info) == R_386_PC32) | |
928 | p->pc_count += 1; | |
252b5132 | 929 | } |
252b5132 RH |
930 | break; |
931 | ||
932 | /* This relocation describes the C++ object vtable hierarchy. | |
933 | Reconstruct it for later use during GC. */ | |
934 | case R_386_GNU_VTINHERIT: | |
935 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
936 | return false; | |
937 | break; | |
938 | ||
939 | /* This relocation describes which C++ vtable entries are actually | |
940 | used. Record for later use during GC. */ | |
941 | case R_386_GNU_VTENTRY: | |
942 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
943 | return false; | |
944 | break; | |
945 | ||
946 | default: | |
947 | break; | |
948 | } | |
949 | } | |
950 | ||
951 | return true; | |
952 | } | |
953 | ||
954 | /* Return the section that should be marked against GC for a given | |
955 | relocation. */ | |
956 | ||
957 | static asection * | |
958 | elf_i386_gc_mark_hook (abfd, info, rel, h, sym) | |
959 | bfd *abfd; | |
7442e600 | 960 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
961 | Elf_Internal_Rela *rel; |
962 | struct elf_link_hash_entry *h; | |
963 | Elf_Internal_Sym *sym; | |
964 | { | |
965 | if (h != NULL) | |
966 | { | |
967 | switch (ELF32_R_TYPE (rel->r_info)) | |
968 | { | |
969 | case R_386_GNU_VTINHERIT: | |
970 | case R_386_GNU_VTENTRY: | |
971 | break; | |
972 | ||
973 | default: | |
974 | switch (h->root.type) | |
975 | { | |
976 | case bfd_link_hash_defined: | |
977 | case bfd_link_hash_defweak: | |
978 | return h->root.u.def.section; | |
979 | ||
980 | case bfd_link_hash_common: | |
981 | return h->root.u.c.p->section; | |
982 | ||
983 | default: | |
984 | break; | |
985 | } | |
986 | } | |
987 | } | |
988 | else | |
989 | { | |
9ad5cbcf | 990 | return bfd_section_from_elf_index (abfd, sym->st_shndx); |
252b5132 RH |
991 | } |
992 | ||
993 | return NULL; | |
994 | } | |
995 | ||
996 | /* Update the got entry reference counts for the section being removed. */ | |
997 | ||
998 | static boolean | |
999 | elf_i386_gc_sweep_hook (abfd, info, sec, relocs) | |
dd5724d5 | 1000 | bfd *abfd; |
6725bdbf | 1001 | struct bfd_link_info *info; |
dd5724d5 AM |
1002 | asection *sec; |
1003 | const Elf_Internal_Rela *relocs; | |
252b5132 | 1004 | { |
dd5724d5 AM |
1005 | Elf_Internal_Shdr *symtab_hdr; |
1006 | struct elf_link_hash_entry **sym_hashes; | |
1007 | bfd_signed_vma *local_got_refcounts; | |
1008 | const Elf_Internal_Rela *rel, *relend; | |
1009 | unsigned long r_symndx; | |
1010 | struct elf_link_hash_entry *h; | |
dd5724d5 | 1011 | |
ec338859 | 1012 | elf_section_data (sec)->local_dynrel = NULL; |
dd5724d5 | 1013 | |
6725bdbf AM |
1014 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1015 | sym_hashes = elf_sym_hashes (abfd); | |
1016 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
dd5724d5 AM |
1017 | |
1018 | relend = relocs + sec->reloc_count; | |
1019 | for (rel = relocs; rel < relend; rel++) | |
1020 | switch (ELF32_R_TYPE (rel->r_info)) | |
1021 | { | |
1022 | case R_386_GOT32: | |
1023 | case R_386_GOTOFF: | |
1024 | case R_386_GOTPC: | |
1025 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1026 | if (r_symndx >= symtab_hdr->sh_info) | |
1027 | { | |
1028 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1029 | if (h->got.refcount > 0) | |
6725bdbf | 1030 | h->got.refcount -= 1; |
dd5724d5 AM |
1031 | } |
1032 | else if (local_got_refcounts != NULL) | |
1033 | { | |
1034 | if (local_got_refcounts[r_symndx] > 0) | |
6725bdbf | 1035 | local_got_refcounts[r_symndx] -= 1; |
dd5724d5 AM |
1036 | } |
1037 | break; | |
1038 | ||
6725bdbf AM |
1039 | case R_386_32: |
1040 | case R_386_PC32: | |
0c715baa AM |
1041 | r_symndx = ELF32_R_SYM (rel->r_info); |
1042 | if (r_symndx >= symtab_hdr->sh_info) | |
1043 | { | |
1044 | struct elf_i386_link_hash_entry *eh; | |
1045 | struct elf_i386_dyn_relocs **pp; | |
1046 | struct elf_i386_dyn_relocs *p; | |
1047 | ||
1048 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1049 | ||
1050 | if (!info->shared && h->plt.refcount > 0) | |
1051 | h->plt.refcount -= 1; | |
1052 | ||
1053 | eh = (struct elf_i386_link_hash_entry *) h; | |
1054 | ||
1055 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
1056 | if (p->sec == sec) | |
1057 | { | |
1058 | if (ELF32_R_TYPE (rel->r_info) == R_386_PC32) | |
1059 | p->pc_count -= 1; | |
1060 | p->count -= 1; | |
1061 | if (p->count == 0) | |
1062 | *pp = p->next; | |
1063 | break; | |
1064 | } | |
1065 | } | |
1066 | break; | |
6725bdbf | 1067 | |
dd5724d5 AM |
1068 | case R_386_PLT32: |
1069 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1070 | if (r_symndx >= symtab_hdr->sh_info) | |
1071 | { | |
1072 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1073 | if (h->plt.refcount > 0) | |
1074 | h->plt.refcount -= 1; | |
1075 | } | |
1076 | break; | |
1077 | ||
1078 | default: | |
1079 | break; | |
1080 | } | |
252b5132 RH |
1081 | |
1082 | return true; | |
1083 | } | |
1084 | ||
1085 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1086 | regular object. The current definition is in some section of the | |
1087 | dynamic object, but we're not including those sections. We have to | |
1088 | change the definition to something the rest of the link can | |
1089 | understand. */ | |
1090 | ||
1091 | static boolean | |
1092 | elf_i386_adjust_dynamic_symbol (info, h) | |
1093 | struct bfd_link_info *info; | |
1094 | struct elf_link_hash_entry *h; | |
1095 | { | |
6725bdbf | 1096 | struct elf_i386_link_hash_table *htab; |
ebe50bae AM |
1097 | struct elf_i386_link_hash_entry * eh; |
1098 | struct elf_i386_dyn_relocs *p; | |
252b5132 RH |
1099 | asection *s; |
1100 | unsigned int power_of_two; | |
1101 | ||
252b5132 RH |
1102 | /* If this is a function, put it in the procedure linkage table. We |
1103 | will fill in the contents of the procedure linkage table later, | |
1104 | when we know the address of the .got section. */ | |
1105 | if (h->type == STT_FUNC | |
1106 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
1107 | { | |
6725bdbf AM |
1108 | if (h->plt.refcount <= 0 |
1109 | || (! info->shared | |
1110 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
f9cd9119 MS |
1111 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 |
1112 | && h->root.type != bfd_link_hash_undefweak | |
1113 | && h->root.type != bfd_link_hash_undefined)) | |
252b5132 RH |
1114 | { |
1115 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
1116 | file, but the symbol was never referred to by a dynamic |
1117 | object, or if all references were garbage collected. In | |
1118 | such a case, we don't actually need to build a procedure | |
1119 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 1120 | h->plt.offset = (bfd_vma) -1; |
dd5724d5 | 1121 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
252b5132 RH |
1122 | } |
1123 | ||
252b5132 RH |
1124 | return true; |
1125 | } | |
6725bdbf AM |
1126 | else |
1127 | /* It's possible that we incorrectly decided a .plt reloc was | |
1128 | needed for an R_386_PC32 reloc to a non-function sym in | |
1129 | check_relocs. We can't decide accurately between function and | |
1130 | non-function syms in check-relocs; Objects loaded later in | |
1131 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1132 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
1133 | |
1134 | /* If this is a weak symbol, and there is a real definition, the | |
1135 | processor independent code will have arranged for us to see the | |
1136 | real definition first, and we can just use the same value. */ | |
1137 | if (h->weakdef != NULL) | |
1138 | { | |
1139 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1140 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1141 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1142 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
0a991dfe | 1143 | return true; |
252b5132 RH |
1144 | } |
1145 | ||
1146 | /* This is a reference to a symbol defined by a dynamic object which | |
1147 | is not a function. */ | |
1148 | ||
1149 | /* If we are creating a shared library, we must presume that the | |
1150 | only references to the symbol are via the global offset table. | |
1151 | For such cases we need not do anything here; the relocations will | |
1152 | be handled correctly by relocate_section. */ | |
1153 | if (info->shared) | |
1154 | return true; | |
1155 | ||
7843f00e ILT |
1156 | /* If there are no references to this symbol that do not use the |
1157 | GOT, we don't need to generate a copy reloc. */ | |
1158 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
1159 | return true; | |
1160 | ||
8bd621d8 AM |
1161 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1162 | if (info->nocopyreloc) | |
1163 | { | |
1164 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
1165 | return true; | |
1166 | } | |
1167 | ||
ebe50bae AM |
1168 | eh = (struct elf_i386_link_hash_entry *) h; |
1169 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1170 | { | |
1171 | s = p->sec->output_section; | |
1172 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1173 | break; | |
1174 | } | |
1175 | ||
1176 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1177 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1178 | if (p == NULL) | |
1179 | { | |
1180 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
1181 | return true; | |
1182 | } | |
1183 | ||
252b5132 RH |
1184 | /* We must allocate the symbol in our .dynbss section, which will |
1185 | become part of the .bss section of the executable. There will be | |
1186 | an entry for this symbol in the .dynsym section. The dynamic | |
1187 | object will contain position independent code, so all references | |
1188 | from the dynamic object to this symbol will go through the global | |
1189 | offset table. The dynamic linker will use the .dynsym entry to | |
1190 | determine the address it must put in the global offset table, so | |
1191 | both the dynamic object and the regular object will refer to the | |
1192 | same memory location for the variable. */ | |
1193 | ||
0ac8d2ca | 1194 | htab = elf_i386_hash_table (info); |
252b5132 RH |
1195 | |
1196 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to | |
1197 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 1198 | runtime process image. */ |
252b5132 RH |
1199 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1200 | { | |
0ac8d2ca | 1201 | htab->srelbss->_raw_size += sizeof (Elf32_External_Rel); |
252b5132 RH |
1202 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
1203 | } | |
1204 | ||
1205 | /* We need to figure out the alignment required for this symbol. I | |
1206 | have no idea how ELF linkers handle this. */ | |
1207 | power_of_two = bfd_log2 (h->size); | |
1208 | if (power_of_two > 3) | |
1209 | power_of_two = 3; | |
1210 | ||
1211 | /* Apply the required alignment. */ | |
0ac8d2ca AM |
1212 | s = htab->sdynbss; |
1213 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); | |
1214 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) | |
252b5132 | 1215 | { |
0ac8d2ca | 1216 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
252b5132 RH |
1217 | return false; |
1218 | } | |
1219 | ||
1220 | /* Define the symbol as being at this point in the section. */ | |
1221 | h->root.u.def.section = s; | |
1222 | h->root.u.def.value = s->_raw_size; | |
1223 | ||
1224 | /* Increment the section size to make room for the symbol. */ | |
1225 | s->_raw_size += h->size; | |
1226 | ||
1227 | return true; | |
1228 | } | |
1229 | ||
6725bdbf AM |
1230 | /* This is the condition under which elf_i386_finish_dynamic_symbol |
1231 | will be called from elflink.h. If elflink.h doesn't call our | |
1232 | finish_dynamic_symbol routine, we'll need to do something about | |
1233 | initializing any .plt and .got entries in elf_i386_relocate_section. */ | |
1234 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ | |
1235 | ((DYN) \ | |
1236 | && ((INFO)->shared \ | |
1237 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ | |
1238 | && ((H)->dynindx != -1 \ | |
1239 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
1240 | ||
1241 | /* Allocate space in .plt, .got and associated reloc sections for | |
0c715baa | 1242 | dynamic relocs. */ |
6725bdbf AM |
1243 | |
1244 | static boolean | |
0c715baa | 1245 | allocate_dynrelocs (h, inf) |
6725bdbf AM |
1246 | struct elf_link_hash_entry *h; |
1247 | PTR inf; | |
1248 | { | |
1249 | struct bfd_link_info *info; | |
1250 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 1251 | struct elf_i386_link_hash_entry *eh; |
0c715baa | 1252 | struct elf_i386_dyn_relocs *p; |
6725bdbf AM |
1253 | |
1254 | if (h->root.type == bfd_link_hash_indirect | |
1255 | || h->root.type == bfd_link_hash_warning) | |
1256 | return true; | |
1257 | ||
1258 | info = (struct bfd_link_info *) inf; | |
1259 | htab = elf_i386_hash_table (info); | |
1260 | ||
ebe50bae | 1261 | if (htab->elf.dynamic_sections_created |
6725bdbf AM |
1262 | && h->plt.refcount > 0) |
1263 | { | |
5a15f56f AM |
1264 | /* Make sure this symbol is output as a dynamic symbol. |
1265 | Undefined weak syms won't yet be marked as dynamic. */ | |
1266 | if (h->dynindx == -1 | |
1267 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1268 | { | |
1269 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
1270 | return false; | |
1271 | } | |
1272 | ||
ced53ee5 AM |
1273 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) |
1274 | { | |
0ac8d2ca | 1275 | asection *s = htab->splt; |
6725bdbf | 1276 | |
ced53ee5 AM |
1277 | /* If this is the first .plt entry, make room for the special |
1278 | first entry. */ | |
1279 | if (s->_raw_size == 0) | |
1280 | s->_raw_size += PLT_ENTRY_SIZE; | |
6725bdbf | 1281 | |
ced53ee5 | 1282 | h->plt.offset = s->_raw_size; |
6725bdbf | 1283 | |
ced53ee5 AM |
1284 | /* If this symbol is not defined in a regular file, and we are |
1285 | not generating a shared library, then set the symbol to this | |
1286 | location in the .plt. This is required to make function | |
1287 | pointers compare as equal between the normal executable and | |
1288 | the shared library. */ | |
1289 | if (! info->shared | |
1290 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1291 | { | |
1292 | h->root.u.def.section = s; | |
1293 | h->root.u.def.value = h->plt.offset; | |
1294 | } | |
6725bdbf | 1295 | |
ced53ee5 AM |
1296 | /* Make room for this entry. */ |
1297 | s->_raw_size += PLT_ENTRY_SIZE; | |
6725bdbf | 1298 | |
ced53ee5 AM |
1299 | /* We also need to make an entry in the .got.plt section, which |
1300 | will be placed in the .got section by the linker script. */ | |
0ac8d2ca | 1301 | htab->sgotplt->_raw_size += 4; |
6725bdbf | 1302 | |
6725bdbf | 1303 | /* We also need to make an entry in the .rel.plt section. */ |
0ac8d2ca | 1304 | htab->srelplt->_raw_size += sizeof (Elf32_External_Rel); |
6725bdbf | 1305 | } |
ced53ee5 AM |
1306 | else |
1307 | { | |
51b64d56 | 1308 | h->plt.offset = (bfd_vma) -1; |
ced53ee5 AM |
1309 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
1310 | } | |
6725bdbf AM |
1311 | } |
1312 | else | |
1313 | { | |
51b64d56 | 1314 | h->plt.offset = (bfd_vma) -1; |
6725bdbf AM |
1315 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
1316 | } | |
1317 | ||
1318 | if (h->got.refcount > 0) | |
1319 | { | |
0ac8d2ca | 1320 | asection *s; |
6725bdbf AM |
1321 | boolean dyn; |
1322 | ||
5a15f56f AM |
1323 | /* Make sure this symbol is output as a dynamic symbol. |
1324 | Undefined weak syms won't yet be marked as dynamic. */ | |
1325 | if (h->dynindx == -1 | |
1326 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1327 | { | |
1328 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
1329 | return false; | |
1330 | } | |
1331 | ||
6725bdbf AM |
1332 | s = htab->sgot; |
1333 | h->got.offset = s->_raw_size; | |
1334 | s->_raw_size += 4; | |
ebe50bae | 1335 | dyn = htab->elf.dynamic_sections_created; |
6725bdbf AM |
1336 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) |
1337 | htab->srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
1338 | } | |
1339 | else | |
51b64d56 | 1340 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 1341 | |
5a15f56f AM |
1342 | eh = (struct elf_i386_link_hash_entry *) h; |
1343 | if (eh->dyn_relocs == NULL) | |
1344 | return true; | |
1345 | ||
0c715baa AM |
1346 | /* In the shared -Bsymbolic case, discard space allocated for |
1347 | dynamic pc-relative relocs against symbols which turn out to be | |
1348 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
1349 | space for pc-relative relocs that have become local due to symbol |
1350 | visibility changes. */ | |
0c715baa AM |
1351 | |
1352 | if (info->shared) | |
5a15f56f | 1353 | { |
0c715baa AM |
1354 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
1355 | && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
1356 | || info->symbolic)) | |
5a15f56f | 1357 | { |
0c715baa AM |
1358 | struct elf_i386_dyn_relocs **pp; |
1359 | ||
1360 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1361 | { | |
1362 | p->count -= p->pc_count; | |
1363 | p->pc_count = 0; | |
1364 | if (p->count == 0) | |
1365 | *pp = p->next; | |
1366 | else | |
1367 | pp = &p->next; | |
1368 | } | |
5a15f56f | 1369 | } |
0c715baa AM |
1370 | } |
1371 | else | |
1372 | { | |
1373 | /* For the non-shared case, discard space for relocs against | |
1374 | symbols which turn out to need copy relocs or are not | |
1375 | dynamic. */ | |
1376 | ||
1377 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
1378 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1379 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
ebe50bae | 1380 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
1381 | && (h->root.type == bfd_link_hash_undefweak |
1382 | || h->root.type == bfd_link_hash_undefined)))) | |
1383 | { | |
1384 | /* Make sure this symbol is output as a dynamic symbol. | |
1385 | Undefined weak syms won't yet be marked as dynamic. */ | |
1386 | if (h->dynindx == -1 | |
1387 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1388 | { | |
1389 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
1390 | return false; | |
1391 | } | |
5a15f56f | 1392 | |
0c715baa AM |
1393 | /* If that succeeded, we know we'll be keeping all the |
1394 | relocs. */ | |
1395 | if (h->dynindx != -1) | |
1396 | goto keep; | |
1397 | } | |
1398 | ||
1399 | eh->dyn_relocs = NULL; | |
1400 | ||
ec338859 | 1401 | keep: ; |
5a15f56f AM |
1402 | } |
1403 | ||
0c715baa AM |
1404 | /* Finally, allocate space. */ |
1405 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 1406 | { |
0c715baa AM |
1407 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
1408 | sreloc->_raw_size += p->count * sizeof (Elf32_External_Rel); | |
12d0ee4a AM |
1409 | } |
1410 | ||
6725bdbf AM |
1411 | return true; |
1412 | } | |
1413 | ||
0c715baa AM |
1414 | /* Find any dynamic relocs that apply to read-only sections. */ |
1415 | ||
1416 | static boolean | |
1417 | readonly_dynrelocs (h, inf) | |
1418 | struct elf_link_hash_entry *h; | |
1419 | PTR inf; | |
1420 | { | |
1421 | struct elf_i386_link_hash_entry *eh; | |
1422 | struct elf_i386_dyn_relocs *p; | |
1423 | ||
1424 | eh = (struct elf_i386_link_hash_entry *) h; | |
1425 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1426 | { | |
1427 | asection *s = p->sec->output_section; | |
1428 | ||
1429 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1430 | { | |
1431 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1432 | ||
1433 | info->flags |= DF_TEXTREL; | |
1434 | ||
1435 | /* Not an error, just cut short the traversal. */ | |
1436 | return false; | |
1437 | } | |
1438 | } | |
1439 | return true; | |
1440 | } | |
1441 | ||
252b5132 RH |
1442 | /* Set the sizes of the dynamic sections. */ |
1443 | ||
1444 | static boolean | |
1445 | elf_i386_size_dynamic_sections (output_bfd, info) | |
db6751f2 | 1446 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1447 | struct bfd_link_info *info; |
1448 | { | |
6725bdbf | 1449 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1450 | bfd *dynobj; |
1451 | asection *s; | |
252b5132 | 1452 | boolean relocs; |
0c715baa | 1453 | bfd *ibfd; |
252b5132 | 1454 | |
6725bdbf | 1455 | htab = elf_i386_hash_table (info); |
ebe50bae | 1456 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
1457 | if (dynobj == NULL) |
1458 | abort (); | |
252b5132 | 1459 | |
ebe50bae | 1460 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
1461 | { |
1462 | /* Set the contents of the .interp section to the interpreter. */ | |
1463 | if (! info->shared) | |
1464 | { | |
1465 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
ffb2e45b AM |
1466 | if (s == NULL) |
1467 | abort (); | |
252b5132 RH |
1468 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
1469 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1470 | } | |
161d71a6 | 1471 | } |
6725bdbf | 1472 | |
0c715baa AM |
1473 | /* Set up .got offsets for local syms, and space for local dynamic |
1474 | relocs. */ | |
1475 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
161d71a6 L |
1476 | { |
1477 | bfd_signed_vma *local_got; | |
1478 | bfd_signed_vma *end_local_got; | |
1479 | bfd_size_type locsymcount; | |
1480 | Elf_Internal_Shdr *symtab_hdr; | |
1481 | asection *srel; | |
6725bdbf | 1482 | |
0c715baa | 1483 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
161d71a6 | 1484 | continue; |
6725bdbf | 1485 | |
0c715baa AM |
1486 | for (s = ibfd->sections; s != NULL; s = s->next) |
1487 | { | |
ec338859 | 1488 | struct elf_i386_dyn_relocs *p; |
0c715baa | 1489 | |
ec338859 AM |
1490 | for (p = *((struct elf_i386_dyn_relocs **) |
1491 | &elf_section_data (s)->local_dynrel); | |
1492 | p != NULL; | |
1493 | p = p->next) | |
0c715baa | 1494 | { |
ec338859 AM |
1495 | if (!bfd_is_abs_section (p->sec) |
1496 | && bfd_is_abs_section (p->sec->output_section)) | |
1497 | { | |
1498 | /* Input section has been discarded, either because | |
1499 | it is a copy of a linkonce section or due to | |
1500 | linker script /DISCARD/, so we'll be discarding | |
1501 | the relocs too. */ | |
1502 | } | |
248866a8 | 1503 | else if (p->count != 0) |
ec338859 AM |
1504 | { |
1505 | srel = elf_section_data (p->sec)->sreloc; | |
1506 | srel->_raw_size += p->count * sizeof (Elf32_External_Rel); | |
248866a8 AM |
1507 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
1508 | info->flags |= DF_TEXTREL; | |
ec338859 | 1509 | } |
0c715baa AM |
1510 | } |
1511 | } | |
1512 | ||
1513 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
1514 | if (!local_got) |
1515 | continue; | |
6725bdbf | 1516 | |
0c715baa | 1517 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
161d71a6 L |
1518 | locsymcount = symtab_hdr->sh_info; |
1519 | end_local_got = local_got + locsymcount; | |
1520 | s = htab->sgot; | |
1521 | srel = htab->srelgot; | |
1522 | for (; local_got < end_local_got; ++local_got) | |
1523 | { | |
1524 | if (*local_got > 0) | |
6725bdbf | 1525 | { |
161d71a6 L |
1526 | *local_got = s->_raw_size; |
1527 | s->_raw_size += 4; | |
1528 | if (info->shared) | |
1529 | srel->_raw_size += sizeof (Elf32_External_Rel); | |
6725bdbf | 1530 | } |
161d71a6 L |
1531 | else |
1532 | *local_got = (bfd_vma) -1; | |
6725bdbf | 1533 | } |
252b5132 | 1534 | } |
6725bdbf | 1535 | |
0c715baa AM |
1536 | /* Allocate global sym .plt and .got entries, and space for global |
1537 | sym dynamic relocs. */ | |
ebe50bae | 1538 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); |
252b5132 | 1539 | |
5a15f56f AM |
1540 | /* We now have determined the sizes of the various dynamic sections. |
1541 | Allocate memory for them. */ | |
252b5132 | 1542 | relocs = false; |
252b5132 RH |
1543 | for (s = dynobj->sections; s != NULL; s = s->next) |
1544 | { | |
252b5132 RH |
1545 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
1546 | continue; | |
1547 | ||
6725bdbf AM |
1548 | if (s == htab->splt |
1549 | || s == htab->sgot | |
1550 | || s == htab->sgotplt) | |
252b5132 | 1551 | { |
6725bdbf AM |
1552 | /* Strip this section if we don't need it; see the |
1553 | comment below. */ | |
252b5132 | 1554 | } |
6725bdbf | 1555 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0) |
252b5132 | 1556 | { |
0ac8d2ca AM |
1557 | if (s->_raw_size != 0 && s != htab->srelplt) |
1558 | relocs = true; | |
252b5132 | 1559 | |
0ac8d2ca AM |
1560 | /* We use the reloc_count field as a counter if we need |
1561 | to copy relocs into the output file. */ | |
1562 | s->reloc_count = 0; | |
252b5132 | 1563 | } |
6725bdbf | 1564 | else |
252b5132 RH |
1565 | { |
1566 | /* It's not one of our sections, so don't allocate space. */ | |
1567 | continue; | |
1568 | } | |
1569 | ||
6725bdbf | 1570 | if (s->_raw_size == 0) |
252b5132 | 1571 | { |
0ac8d2ca AM |
1572 | /* If we don't need this section, strip it from the |
1573 | output file. This is mostly to handle .rel.bss and | |
1574 | .rel.plt. We must create both sections in | |
1575 | create_dynamic_sections, because they must be created | |
1576 | before the linker maps input sections to output | |
1577 | sections. The linker does that before | |
1578 | adjust_dynamic_symbol is called, and it is that | |
1579 | function which decides whether anything needs to go | |
1580 | into these sections. */ | |
1581 | ||
7f8d5fc9 | 1582 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
1583 | continue; |
1584 | } | |
1585 | ||
f69da49f AM |
1586 | /* Allocate memory for the section contents. We use bfd_zalloc |
1587 | here in case unused entries are not reclaimed before the | |
1588 | section's contents are written out. This should not happen, | |
1589 | but this way if it does, we get a R_386_NONE reloc instead | |
1590 | of garbage. */ | |
7a9af8c4 | 1591 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
6725bdbf | 1592 | if (s->contents == NULL) |
252b5132 RH |
1593 | return false; |
1594 | } | |
1595 | ||
ebe50bae | 1596 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
1597 | { |
1598 | /* Add some entries to the .dynamic section. We fill in the | |
1599 | values later, in elf_i386_finish_dynamic_sections, but we | |
1600 | must add the entries now so that we get the correct size for | |
1601 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1602 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
1603 | #define add_dynamic_entry(TAG, VAL) \ |
1604 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
1605 | ||
252b5132 RH |
1606 | if (! info->shared) |
1607 | { | |
dc810e39 | 1608 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
252b5132 RH |
1609 | return false; |
1610 | } | |
1611 | ||
6725bdbf | 1612 | if (htab->splt->_raw_size != 0) |
252b5132 | 1613 | { |
dc810e39 AM |
1614 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1615 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1616 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
1617 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
252b5132 RH |
1618 | return false; |
1619 | } | |
1620 | ||
1621 | if (relocs) | |
1622 | { | |
dc810e39 AM |
1623 | if (!add_dynamic_entry (DT_REL, 0) |
1624 | || !add_dynamic_entry (DT_RELSZ, 0) | |
1625 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
252b5132 | 1626 | return false; |
252b5132 | 1627 | |
0c715baa AM |
1628 | /* If any dynamic relocs apply to a read-only section, |
1629 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
1630 | if ((info->flags & DF_TEXTREL) == 0) |
1631 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
1632 | (PTR) info); | |
0c715baa AM |
1633 | |
1634 | if ((info->flags & DF_TEXTREL) != 0) | |
1635 | { | |
1636 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
1637 | return false; | |
1638 | } | |
252b5132 RH |
1639 | } |
1640 | } | |
dc810e39 | 1641 | #undef add_dynamic_entry |
252b5132 RH |
1642 | |
1643 | return true; | |
1644 | } | |
1645 | ||
38701953 AM |
1646 | /* Set the correct type for an x86 ELF section. We do this by the |
1647 | section name, which is a hack, but ought to work. */ | |
1648 | ||
1649 | static boolean | |
1650 | elf_i386_fake_sections (abfd, hdr, sec) | |
1651 | bfd *abfd ATTRIBUTE_UNUSED; | |
1652 | Elf32_Internal_Shdr *hdr; | |
1653 | asection *sec; | |
1654 | { | |
1655 | register const char *name; | |
1656 | ||
1657 | name = bfd_get_section_name (abfd, sec); | |
1658 | ||
1659 | /* This is an ugly, but unfortunately necessary hack that is | |
1660 | needed when producing EFI binaries on x86. It tells | |
1661 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
1662 | containing ELF relocation info. We need this hack in order to | |
1663 | be able to generate ELF binaries that can be translated into | |
1664 | EFI applications (which are essentially COFF objects). Those | |
1665 | files contain a COFF ".reloc" section inside an ELFNN object, | |
1666 | which would normally cause BFD to segfault because it would | |
1667 | attempt to interpret this section as containing relocation | |
1668 | entries for section "oc". With this hack enabled, ".reloc" | |
1669 | will be treated as a normal data section, which will avoid the | |
1670 | segfault. However, you won't be able to create an ELFNN binary | |
1671 | with a section named "oc" that needs relocations, but that's | |
1672 | the kind of ugly side-effects you get when detecting section | |
1673 | types based on their names... In practice, this limitation is | |
1674 | unlikely to bite. */ | |
1675 | if (strcmp (name, ".reloc") == 0) | |
1676 | hdr->sh_type = SHT_PROGBITS; | |
1677 | ||
1678 | return true; | |
1679 | } | |
1680 | ||
252b5132 RH |
1681 | /* Relocate an i386 ELF section. */ |
1682 | ||
1683 | static boolean | |
1684 | elf_i386_relocate_section (output_bfd, info, input_bfd, input_section, | |
1685 | contents, relocs, local_syms, local_sections) | |
1686 | bfd *output_bfd; | |
1687 | struct bfd_link_info *info; | |
1688 | bfd *input_bfd; | |
1689 | asection *input_section; | |
1690 | bfd_byte *contents; | |
1691 | Elf_Internal_Rela *relocs; | |
1692 | Elf_Internal_Sym *local_syms; | |
1693 | asection **local_sections; | |
1694 | { | |
6725bdbf | 1695 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1696 | Elf_Internal_Shdr *symtab_hdr; |
1697 | struct elf_link_hash_entry **sym_hashes; | |
1698 | bfd_vma *local_got_offsets; | |
252b5132 RH |
1699 | Elf_Internal_Rela *rel; |
1700 | Elf_Internal_Rela *relend; | |
1701 | ||
6725bdbf | 1702 | htab = elf_i386_hash_table (info); |
252b5132 RH |
1703 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1704 | sym_hashes = elf_sym_hashes (input_bfd); | |
1705 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1706 | ||
252b5132 RH |
1707 | rel = relocs; |
1708 | relend = relocs + input_section->reloc_count; | |
1709 | for (; rel < relend; rel++) | |
1710 | { | |
1711 | int r_type; | |
1712 | reloc_howto_type *howto; | |
1713 | unsigned long r_symndx; | |
1714 | struct elf_link_hash_entry *h; | |
1715 | Elf_Internal_Sym *sym; | |
1716 | asection *sec; | |
ffb2e45b | 1717 | bfd_vma off; |
252b5132 | 1718 | bfd_vma relocation; |
83be169b | 1719 | boolean unresolved_reloc; |
252b5132 | 1720 | bfd_reloc_status_type r; |
1b452ec6 | 1721 | unsigned int indx; |
252b5132 RH |
1722 | |
1723 | r_type = ELF32_R_TYPE (rel->r_info); | |
dc47f327 AM |
1724 | if (r_type == (int) R_386_GNU_VTINHERIT |
1725 | || r_type == (int) R_386_GNU_VTENTRY) | |
252b5132 | 1726 | continue; |
dc47f327 | 1727 | |
1b452ec6 | 1728 | if ((indx = (unsigned) r_type) >= R_386_standard |
dc47f327 AM |
1729 | && ((indx = (unsigned) r_type - R_386_ext_offset) - R_386_standard |
1730 | >= R_386_ext - R_386_standard)) | |
252b5132 RH |
1731 | { |
1732 | bfd_set_error (bfd_error_bad_value); | |
1733 | return false; | |
1734 | } | |
1b452ec6 | 1735 | howto = elf_howto_table + indx; |
252b5132 RH |
1736 | |
1737 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1738 | ||
1739 | if (info->relocateable) | |
1740 | { | |
0ac8d2ca | 1741 | /* This is a relocatable link. We don't have to change |
252b5132 RH |
1742 | anything, unless the reloc is against a section symbol, |
1743 | in which case we have to adjust according to where the | |
1744 | section symbol winds up in the output section. */ | |
1745 | if (r_symndx < symtab_hdr->sh_info) | |
1746 | { | |
1747 | sym = local_syms + r_symndx; | |
1748 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1749 | { | |
1750 | bfd_vma val; | |
1751 | ||
1752 | sec = local_sections[r_symndx]; | |
1753 | val = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
1754 | val += sec->output_offset + sym->st_value; | |
1755 | bfd_put_32 (input_bfd, val, contents + rel->r_offset); | |
1756 | } | |
1757 | } | |
252b5132 RH |
1758 | continue; |
1759 | } | |
1760 | ||
1761 | /* This is a final link. */ | |
1762 | h = NULL; | |
1763 | sym = NULL; | |
1764 | sec = NULL; | |
83be169b | 1765 | unresolved_reloc = false; |
252b5132 RH |
1766 | if (r_symndx < symtab_hdr->sh_info) |
1767 | { | |
1768 | sym = local_syms + r_symndx; | |
1769 | sec = local_sections[r_symndx]; | |
1770 | relocation = (sec->output_section->vma | |
1771 | + sec->output_offset | |
1772 | + sym->st_value); | |
f8df10f4 JJ |
1773 | if ((sec->flags & SEC_MERGE) |
1774 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1775 | { | |
1776 | asection *msec; | |
1777 | bfd_vma addend; | |
1778 | ||
1779 | if (howto->src_mask != 0xffffffff) | |
1780 | { | |
1781 | (*_bfd_error_handler) | |
1782 | (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"), | |
1783 | bfd_archive_filename (input_bfd), | |
1784 | bfd_get_section_name (input_bfd, input_section), | |
1785 | (long) rel->r_offset, howto->name); | |
1786 | return false; | |
1787 | } | |
1788 | ||
1789 | addend = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
1790 | msec = sec; | |
1791 | addend = | |
c629eae0 | 1792 | _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) |
f8df10f4 JJ |
1793 | - relocation; |
1794 | addend += msec->output_section->vma + msec->output_offset; | |
1795 | bfd_put_32 (input_bfd, addend, contents + rel->r_offset); | |
1796 | } | |
252b5132 RH |
1797 | } |
1798 | else | |
1799 | { | |
1800 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1801 | while (h->root.type == bfd_link_hash_indirect | |
1802 | || h->root.type == bfd_link_hash_warning) | |
1803 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
ffb2e45b | 1804 | |
6725bdbf | 1805 | relocation = 0; |
252b5132 RH |
1806 | if (h->root.type == bfd_link_hash_defined |
1807 | || h->root.type == bfd_link_hash_defweak) | |
1808 | { | |
1809 | sec = h->root.u.def.section; | |
83be169b AM |
1810 | if (sec->output_section == NULL) |
1811 | /* Set a flag that will be cleared later if we find a | |
1812 | relocation value for this symbol. output_section | |
1813 | is typically NULL for symbols satisfied by a shared | |
1814 | library. */ | |
1815 | unresolved_reloc = true; | |
252b5132 RH |
1816 | else |
1817 | relocation = (h->root.u.def.value | |
1818 | + sec->output_section->vma | |
1819 | + sec->output_offset); | |
1820 | } | |
1821 | else if (h->root.type == bfd_link_hash_undefweak) | |
6725bdbf | 1822 | ; |
671bae9c NC |
1823 | else if (info->shared |
1824 | && (!info->symbolic || info->allow_shlib_undefined) | |
3a27a730 L |
1825 | && !info->no_undefined |
1826 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
6725bdbf | 1827 | ; |
252b5132 RH |
1828 | else |
1829 | { | |
1830 | if (! ((*info->callbacks->undefined_symbol) | |
1831 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 1832 | input_section, rel->r_offset, |
3a27a730 L |
1833 | (!info->shared || info->no_undefined |
1834 | || ELF_ST_VISIBILITY (h->other))))) | |
252b5132 | 1835 | return false; |
252b5132 RH |
1836 | } |
1837 | } | |
1838 | ||
1839 | switch (r_type) | |
1840 | { | |
1841 | case R_386_GOT32: | |
1842 | /* Relocation is to the entry for this symbol in the global | |
1843 | offset table. */ | |
ffb2e45b AM |
1844 | if (htab->sgot == NULL) |
1845 | abort (); | |
252b5132 RH |
1846 | |
1847 | if (h != NULL) | |
1848 | { | |
6725bdbf | 1849 | boolean dyn; |
252b5132 RH |
1850 | |
1851 | off = h->got.offset; | |
ebe50bae | 1852 | dyn = htab->elf.dynamic_sections_created; |
6725bdbf | 1853 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) |
252b5132 | 1854 | || (info->shared |
6725bdbf AM |
1855 | && (info->symbolic |
1856 | || h->dynindx == -1 | |
1857 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
252b5132 RH |
1858 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
1859 | { | |
1860 | /* This is actually a static link, or it is a | |
1861 | -Bsymbolic link and the symbol is defined | |
1862 | locally, or the symbol was forced to be local | |
1863 | because of a version file. We must initialize | |
1864 | this entry in the global offset table. Since the | |
1865 | offset must always be a multiple of 4, we use the | |
1866 | least significant bit to record whether we have | |
1867 | initialized it already. | |
1868 | ||
1869 | When doing a dynamic link, we create a .rel.got | |
1870 | relocation entry to initialize the value. This | |
1871 | is done in the finish_dynamic_symbol routine. */ | |
1872 | if ((off & 1) != 0) | |
1873 | off &= ~1; | |
1874 | else | |
1875 | { | |
1876 | bfd_put_32 (output_bfd, relocation, | |
6725bdbf | 1877 | htab->sgot->contents + off); |
252b5132 RH |
1878 | h->got.offset |= 1; |
1879 | } | |
1880 | } | |
8c694914 AM |
1881 | else |
1882 | unresolved_reloc = false; | |
252b5132 RH |
1883 | } |
1884 | else | |
1885 | { | |
ffb2e45b AM |
1886 | if (local_got_offsets == NULL) |
1887 | abort (); | |
252b5132 RH |
1888 | |
1889 | off = local_got_offsets[r_symndx]; | |
1890 | ||
1891 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
1892 | the least significant bit to record whether we have |
1893 | already generated the necessary reloc. */ | |
252b5132 RH |
1894 | if ((off & 1) != 0) |
1895 | off &= ~1; | |
1896 | else | |
1897 | { | |
6725bdbf AM |
1898 | bfd_put_32 (output_bfd, relocation, |
1899 | htab->sgot->contents + off); | |
252b5132 RH |
1900 | |
1901 | if (info->shared) | |
1902 | { | |
1903 | asection *srelgot; | |
1904 | Elf_Internal_Rel outrel; | |
0ac8d2ca | 1905 | Elf32_External_Rel *loc; |
252b5132 | 1906 | |
6725bdbf | 1907 | srelgot = htab->srelgot; |
ffb2e45b AM |
1908 | if (srelgot == NULL) |
1909 | abort (); | |
252b5132 | 1910 | |
6725bdbf AM |
1911 | outrel.r_offset = (htab->sgot->output_section->vma |
1912 | + htab->sgot->output_offset | |
252b5132 RH |
1913 | + off); |
1914 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
0ac8d2ca AM |
1915 | loc = (Elf32_External_Rel *) srelgot->contents; |
1916 | loc += srelgot->reloc_count++; | |
1917 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
252b5132 RH |
1918 | } |
1919 | ||
1920 | local_got_offsets[r_symndx] |= 1; | |
1921 | } | |
252b5132 RH |
1922 | } |
1923 | ||
ffb2e45b AM |
1924 | if (off >= (bfd_vma) -2) |
1925 | abort (); | |
1926 | ||
1927 | relocation = htab->sgot->output_offset + off; | |
252b5132 RH |
1928 | break; |
1929 | ||
1930 | case R_386_GOTOFF: | |
1931 | /* Relocation is relative to the start of the global offset | |
1932 | table. */ | |
1933 | ||
252b5132 RH |
1934 | /* Note that sgot->output_offset is not involved in this |
1935 | calculation. We always want the start of .got. If we | |
1936 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
1937 | permitted by the ABI, we might have to change this | |
1938 | calculation. */ | |
6725bdbf | 1939 | relocation -= htab->sgot->output_section->vma; |
252b5132 RH |
1940 | break; |
1941 | ||
1942 | case R_386_GOTPC: | |
1943 | /* Use global offset table as symbol value. */ | |
6725bdbf | 1944 | relocation = htab->sgot->output_section->vma; |
83be169b | 1945 | unresolved_reloc = false; |
252b5132 RH |
1946 | break; |
1947 | ||
1948 | case R_386_PLT32: | |
1949 | /* Relocation is to the entry for this symbol in the | |
1950 | procedure linkage table. */ | |
1951 | ||
dd5724d5 | 1952 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 1953 | without using the procedure linkage table. */ |
252b5132 RH |
1954 | if (h == NULL) |
1955 | break; | |
1956 | ||
dd5724d5 | 1957 | if (h->plt.offset == (bfd_vma) -1 |
6725bdbf | 1958 | || htab->splt == NULL) |
252b5132 RH |
1959 | { |
1960 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
1961 | happens when statically linking PIC code, or when |
1962 | using -Bsymbolic. */ | |
252b5132 RH |
1963 | break; |
1964 | } | |
1965 | ||
6725bdbf AM |
1966 | relocation = (htab->splt->output_section->vma |
1967 | + htab->splt->output_offset | |
252b5132 | 1968 | + h->plt.offset); |
83be169b | 1969 | unresolved_reloc = false; |
252b5132 RH |
1970 | break; |
1971 | ||
1972 | case R_386_32: | |
1973 | case R_386_PC32: | |
ec338859 AM |
1974 | /* r_symndx will be zero only for relocs against symbols |
1975 | from removed linkonce sections, or sections discarded by | |
1976 | a linker script. */ | |
1977 | if (r_symndx == 0 | |
1978 | || (input_section->flags & SEC_ALLOC) == 0) | |
1979 | break; | |
1980 | ||
12d0ee4a | 1981 | if ((info->shared |
12d0ee4a AM |
1982 | && (r_type != R_386_PC32 |
1983 | || (h != NULL | |
1984 | && h->dynindx != -1 | |
1985 | && (! info->symbolic | |
1986 | || (h->elf_link_hash_flags | |
1987 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
1988 | || (!info->shared | |
12d0ee4a AM |
1989 | && h != NULL |
1990 | && h->dynindx != -1 | |
1991 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
56882138 AM |
1992 | && (((h->elf_link_hash_flags |
1993 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1994 | && (h->elf_link_hash_flags | |
1995 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
28d0b90e AM |
1996 | || h->root.type == bfd_link_hash_undefweak |
1997 | || h->root.type == bfd_link_hash_undefined))) | |
252b5132 RH |
1998 | { |
1999 | Elf_Internal_Rel outrel; | |
2000 | boolean skip, relocate; | |
0c715baa AM |
2001 | asection *sreloc; |
2002 | Elf32_External_Rel *loc; | |
252b5132 RH |
2003 | |
2004 | /* When generating a shared object, these relocations | |
2005 | are copied into the output file to be resolved at run | |
2006 | time. */ | |
2007 | ||
252b5132 | 2008 | skip = false; |
0bb2d96a | 2009 | relocate = false; |
252b5132 | 2010 | |
c629eae0 JJ |
2011 | outrel.r_offset = |
2012 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2013 | rel->r_offset); | |
2014 | if (outrel.r_offset == (bfd_vma) -1) | |
2015 | skip = true; | |
0bb2d96a JJ |
2016 | else if (outrel.r_offset == (bfd_vma) -2) |
2017 | skip = true, relocate = true; | |
252b5132 RH |
2018 | outrel.r_offset += (input_section->output_section->vma |
2019 | + input_section->output_offset); | |
2020 | ||
2021 | if (skip) | |
0bb2d96a | 2022 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
2023 | else if (h != NULL |
2024 | && h->dynindx != -1 | |
2025 | && (r_type == R_386_PC32 | |
2026 | || !info->shared | |
2027 | || !info->symbolic | |
2028 | || (h->elf_link_hash_flags | |
2029 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
0bb2d96a | 2030 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
2031 | else |
2032 | { | |
5a15f56f AM |
2033 | /* This symbol is local, or marked to become local. */ |
2034 | relocate = true; | |
2035 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
252b5132 RH |
2036 | } |
2037 | ||
0c715baa AM |
2038 | sreloc = elf_section_data (input_section)->sreloc; |
2039 | if (sreloc == NULL) | |
2040 | abort (); | |
2041 | ||
0ac8d2ca AM |
2042 | loc = (Elf32_External_Rel *) sreloc->contents; |
2043 | loc += sreloc->reloc_count++; | |
0c715baa | 2044 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
252b5132 RH |
2045 | |
2046 | /* If this reloc is against an external symbol, we do | |
2047 | not want to fiddle with the addend. Otherwise, we | |
2048 | need to include the symbol value so that it becomes | |
2049 | an addend for the dynamic reloc. */ | |
2050 | if (! relocate) | |
2051 | continue; | |
2052 | } | |
252b5132 RH |
2053 | break; |
2054 | ||
2055 | default: | |
2056 | break; | |
2057 | } | |
2058 | ||
8c694914 AM |
2059 | /* FIXME: Why do we allow debugging sections to escape this error? |
2060 | More importantly, why do we not emit dynamic relocs for | |
2061 | R_386_32 above in debugging sections (which are ! SEC_ALLOC)? | |
2062 | If we had emitted the dynamic reloc, we could remove the | |
2063 | fudge here. */ | |
2064 | if (unresolved_reloc | |
2065 | && !(info->shared | |
2066 | && (input_section->flags & SEC_DEBUGGING) != 0 | |
2067 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) | |
83be169b AM |
2068 | (*_bfd_error_handler) |
2069 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), | |
8f615d07 | 2070 | bfd_archive_filename (input_bfd), |
83be169b AM |
2071 | bfd_get_section_name (input_bfd, input_section), |
2072 | (long) rel->r_offset, | |
2073 | h->root.root.string); | |
2074 | ||
252b5132 RH |
2075 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
2076 | contents, rel->r_offset, | |
2077 | relocation, (bfd_vma) 0); | |
2078 | ||
cf5c0c5b | 2079 | if (r != bfd_reloc_ok) |
252b5132 | 2080 | { |
cf5c0c5b | 2081 | const char *name; |
ffb2e45b | 2082 | |
cf5c0c5b AM |
2083 | if (h != NULL) |
2084 | name = h->root.root.string; | |
2085 | else | |
2086 | { | |
2087 | name = bfd_elf_string_from_elf_section (input_bfd, | |
2088 | symtab_hdr->sh_link, | |
2089 | sym->st_name); | |
2090 | if (name == NULL) | |
2091 | return false; | |
2092 | if (*name == '\0') | |
2093 | name = bfd_section_name (input_bfd, sec); | |
2094 | } | |
ffb2e45b | 2095 | |
cf5c0c5b AM |
2096 | if (r == bfd_reloc_overflow) |
2097 | { | |
2098 | ||
2099 | if (! ((*info->callbacks->reloc_overflow) | |
2100 | (info, name, howto->name, (bfd_vma) 0, | |
2101 | input_bfd, input_section, rel->r_offset))) | |
2102 | return false; | |
2103 | } | |
2104 | else | |
2105 | { | |
2106 | (*_bfd_error_handler) | |
2107 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), | |
2108 | bfd_archive_filename (input_bfd), | |
2109 | bfd_get_section_name (input_bfd, input_section), | |
2110 | (long) rel->r_offset, name, (int) r); | |
2111 | return false; | |
2112 | } | |
252b5132 RH |
2113 | } |
2114 | } | |
2115 | ||
2116 | return true; | |
2117 | } | |
2118 | ||
2119 | /* Finish up dynamic symbol handling. We set the contents of various | |
2120 | dynamic sections here. */ | |
2121 | ||
2122 | static boolean | |
2123 | elf_i386_finish_dynamic_symbol (output_bfd, info, h, sym) | |
2124 | bfd *output_bfd; | |
2125 | struct bfd_link_info *info; | |
2126 | struct elf_link_hash_entry *h; | |
2127 | Elf_Internal_Sym *sym; | |
2128 | { | |
6725bdbf | 2129 | struct elf_i386_link_hash_table *htab; |
252b5132 | 2130 | |
6725bdbf | 2131 | htab = elf_i386_hash_table (info); |
252b5132 RH |
2132 | |
2133 | if (h->plt.offset != (bfd_vma) -1) | |
2134 | { | |
252b5132 RH |
2135 | bfd_vma plt_index; |
2136 | bfd_vma got_offset; | |
2137 | Elf_Internal_Rel rel; | |
0ac8d2ca | 2138 | Elf32_External_Rel *loc; |
252b5132 RH |
2139 | |
2140 | /* This symbol has an entry in the procedure linkage table. Set | |
2141 | it up. */ | |
2142 | ||
ffb2e45b AM |
2143 | if (h->dynindx == -1 |
2144 | || htab->splt == NULL | |
2145 | || htab->sgotplt == NULL | |
2146 | || htab->srelplt == NULL) | |
2147 | abort (); | |
252b5132 RH |
2148 | |
2149 | /* Get the index in the procedure linkage table which | |
2150 | corresponds to this symbol. This is the index of this symbol | |
2151 | in all the symbols for which we are making plt entries. The | |
2152 | first entry in the procedure linkage table is reserved. */ | |
2153 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2154 | ||
2155 | /* Get the offset into the .got table of the entry that | |
2156 | corresponds to this function. Each .got entry is 4 bytes. | |
2157 | The first three are reserved. */ | |
2158 | got_offset = (plt_index + 3) * 4; | |
2159 | ||
2160 | /* Fill in the entry in the procedure linkage table. */ | |
2161 | if (! info->shared) | |
2162 | { | |
6725bdbf | 2163 | memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry, |
252b5132 RH |
2164 | PLT_ENTRY_SIZE); |
2165 | bfd_put_32 (output_bfd, | |
6725bdbf AM |
2166 | (htab->sgotplt->output_section->vma |
2167 | + htab->sgotplt->output_offset | |
252b5132 | 2168 | + got_offset), |
6725bdbf | 2169 | htab->splt->contents + h->plt.offset + 2); |
252b5132 RH |
2170 | } |
2171 | else | |
2172 | { | |
6725bdbf | 2173 | memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry, |
252b5132 RH |
2174 | PLT_ENTRY_SIZE); |
2175 | bfd_put_32 (output_bfd, got_offset, | |
6725bdbf | 2176 | htab->splt->contents + h->plt.offset + 2); |
252b5132 RH |
2177 | } |
2178 | ||
2179 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel), | |
6725bdbf | 2180 | htab->splt->contents + h->plt.offset + 7); |
252b5132 | 2181 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), |
6725bdbf | 2182 | htab->splt->contents + h->plt.offset + 12); |
252b5132 RH |
2183 | |
2184 | /* Fill in the entry in the global offset table. */ | |
2185 | bfd_put_32 (output_bfd, | |
6725bdbf AM |
2186 | (htab->splt->output_section->vma |
2187 | + htab->splt->output_offset | |
252b5132 RH |
2188 | + h->plt.offset |
2189 | + 6), | |
6725bdbf | 2190 | htab->sgotplt->contents + got_offset); |
252b5132 RH |
2191 | |
2192 | /* Fill in the entry in the .rel.plt section. */ | |
6725bdbf AM |
2193 | rel.r_offset = (htab->sgotplt->output_section->vma |
2194 | + htab->sgotplt->output_offset | |
252b5132 RH |
2195 | + got_offset); |
2196 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
0ac8d2ca AM |
2197 | loc = (Elf32_External_Rel *) htab->srelplt->contents + plt_index; |
2198 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
2199 | |
2200 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2201 | { | |
2202 | /* Mark the symbol as undefined, rather than as defined in | |
51b64d56 AM |
2203 | the .plt section. Leave the value alone. This is a clue |
2204 | for the dynamic linker, to make function pointer | |
2205 | comparisons work between an application and shared | |
2206 | library. */ | |
252b5132 RH |
2207 | sym->st_shndx = SHN_UNDEF; |
2208 | } | |
2209 | } | |
2210 | ||
2211 | if (h->got.offset != (bfd_vma) -1) | |
2212 | { | |
252b5132 | 2213 | Elf_Internal_Rel rel; |
0ac8d2ca | 2214 | Elf32_External_Rel *loc; |
252b5132 RH |
2215 | |
2216 | /* This symbol has an entry in the global offset table. Set it | |
2217 | up. */ | |
2218 | ||
ffb2e45b AM |
2219 | if (htab->sgot == NULL || htab->srelgot == NULL) |
2220 | abort (); | |
252b5132 | 2221 | |
6725bdbf AM |
2222 | rel.r_offset = (htab->sgot->output_section->vma |
2223 | + htab->sgot->output_offset | |
dc810e39 | 2224 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 2225 | |
dd5724d5 AM |
2226 | /* If this is a static link, or it is a -Bsymbolic link and the |
2227 | symbol is defined locally or was forced to be local because | |
2228 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
2229 | The entry in the global offset table will already have been |
2230 | initialized in the relocate_section function. */ | |
6725bdbf AM |
2231 | if (info->shared |
2232 | && (info->symbolic | |
2233 | || h->dynindx == -1 | |
2234 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
2235 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
dd5724d5 | 2236 | { |
6725bdbf | 2237 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
2238 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
2239 | } | |
252b5132 RH |
2240 | else |
2241 | { | |
dd5724d5 | 2242 | BFD_ASSERT((h->got.offset & 1) == 0); |
6725bdbf AM |
2243 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
2244 | htab->sgot->contents + h->got.offset); | |
252b5132 RH |
2245 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
2246 | } | |
2247 | ||
0ac8d2ca AM |
2248 | loc = (Elf32_External_Rel *) htab->srelgot->contents; |
2249 | loc += htab->srelgot->reloc_count++; | |
2250 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
2251 | } |
2252 | ||
791987af | 2253 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
252b5132 | 2254 | { |
252b5132 | 2255 | Elf_Internal_Rel rel; |
0ac8d2ca | 2256 | Elf32_External_Rel *loc; |
252b5132 RH |
2257 | |
2258 | /* This symbol needs a copy reloc. Set it up. */ | |
2259 | ||
ffb2e45b AM |
2260 | if (h->dynindx == -1 |
2261 | || (h->root.type != bfd_link_hash_defined | |
2262 | && h->root.type != bfd_link_hash_defweak) | |
2263 | || htab->srelbss == NULL) | |
2264 | abort (); | |
252b5132 RH |
2265 | |
2266 | rel.r_offset = (h->root.u.def.value | |
2267 | + h->root.u.def.section->output_section->vma | |
2268 | + h->root.u.def.section->output_offset); | |
2269 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
0ac8d2ca AM |
2270 | loc = (Elf32_External_Rel *) htab->srelbss->contents; |
2271 | loc += htab->srelbss->reloc_count++; | |
2272 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
2273 | } |
2274 | ||
2275 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2276 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2277 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2278 | sym->st_shndx = SHN_ABS; | |
2279 | ||
2280 | return true; | |
2281 | } | |
2282 | ||
38701953 AM |
2283 | /* Used to decide how to sort relocs in an optimal manner for the |
2284 | dynamic linker, before writing them out. */ | |
2285 | ||
2286 | static enum elf_reloc_type_class | |
2287 | elf_i386_reloc_type_class (rela) | |
2288 | const Elf_Internal_Rela *rela; | |
2289 | { | |
2290 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
2291 | { | |
2292 | case R_386_RELATIVE: | |
2293 | return reloc_class_relative; | |
2294 | case R_386_JUMP_SLOT: | |
2295 | return reloc_class_plt; | |
2296 | case R_386_COPY: | |
2297 | return reloc_class_copy; | |
2298 | default: | |
2299 | return reloc_class_normal; | |
2300 | } | |
2301 | } | |
2302 | ||
252b5132 RH |
2303 | /* Finish up the dynamic sections. */ |
2304 | ||
2305 | static boolean | |
2306 | elf_i386_finish_dynamic_sections (output_bfd, info) | |
2307 | bfd *output_bfd; | |
2308 | struct bfd_link_info *info; | |
2309 | { | |
6725bdbf | 2310 | struct elf_i386_link_hash_table *htab; |
252b5132 | 2311 | bfd *dynobj; |
252b5132 RH |
2312 | asection *sdyn; |
2313 | ||
6725bdbf | 2314 | htab = elf_i386_hash_table (info); |
ebe50bae | 2315 | dynobj = htab->elf.dynobj; |
252b5132 RH |
2316 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
2317 | ||
ebe50bae | 2318 | if (htab->elf.dynamic_sections_created) |
252b5132 | 2319 | { |
252b5132 RH |
2320 | Elf32_External_Dyn *dyncon, *dynconend; |
2321 | ||
ffb2e45b AM |
2322 | if (sdyn == NULL || htab->sgot == NULL) |
2323 | abort (); | |
252b5132 RH |
2324 | |
2325 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
2326 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
2327 | for (; dyncon < dynconend; dyncon++) | |
2328 | { | |
2329 | Elf_Internal_Dyn dyn; | |
51b64d56 | 2330 | asection *s; |
252b5132 RH |
2331 | |
2332 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
2333 | ||
2334 | switch (dyn.d_tag) | |
2335 | { | |
2336 | default: | |
0ac8d2ca | 2337 | continue; |
252b5132 RH |
2338 | |
2339 | case DT_PLTGOT: | |
6725bdbf | 2340 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
6725bdbf AM |
2341 | break; |
2342 | ||
252b5132 | 2343 | case DT_JMPREL: |
6725bdbf | 2344 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
252b5132 RH |
2345 | break; |
2346 | ||
2347 | case DT_PLTRELSZ: | |
51b64d56 AM |
2348 | s = htab->srelplt->output_section; |
2349 | if (s->_cooked_size != 0) | |
2350 | dyn.d_un.d_val = s->_cooked_size; | |
252b5132 | 2351 | else |
51b64d56 | 2352 | dyn.d_un.d_val = s->_raw_size; |
252b5132 RH |
2353 | break; |
2354 | ||
2355 | case DT_RELSZ: | |
2356 | /* My reading of the SVR4 ABI indicates that the | |
2357 | procedure linkage table relocs (DT_JMPREL) should be | |
2358 | included in the overall relocs (DT_REL). This is | |
2359 | what Solaris does. However, UnixWare can not handle | |
2360 | that case. Therefore, we override the DT_RELSZ entry | |
2361 | here to make it not include the JMPREL relocs. Since | |
2362 | the linker script arranges for .rel.plt to follow all | |
2363 | other relocation sections, we don't have to worry | |
2364 | about changing the DT_REL entry. */ | |
6725bdbf | 2365 | if (htab->srelplt != NULL) |
252b5132 | 2366 | { |
51b64d56 AM |
2367 | s = htab->srelplt->output_section; |
2368 | if (s->_cooked_size != 0) | |
2369 | dyn.d_un.d_val -= s->_cooked_size; | |
252b5132 | 2370 | else |
51b64d56 | 2371 | dyn.d_un.d_val -= s->_raw_size; |
252b5132 | 2372 | } |
252b5132 RH |
2373 | break; |
2374 | } | |
0ac8d2ca AM |
2375 | |
2376 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
2377 | } |
2378 | ||
2379 | /* Fill in the first entry in the procedure linkage table. */ | |
6725bdbf | 2380 | if (htab->splt && htab->splt->_raw_size > 0) |
252b5132 RH |
2381 | { |
2382 | if (info->shared) | |
6725bdbf AM |
2383 | memcpy (htab->splt->contents, |
2384 | elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE); | |
252b5132 RH |
2385 | else |
2386 | { | |
6725bdbf AM |
2387 | memcpy (htab->splt->contents, |
2388 | elf_i386_plt0_entry, PLT_ENTRY_SIZE); | |
252b5132 | 2389 | bfd_put_32 (output_bfd, |
6725bdbf AM |
2390 | (htab->sgotplt->output_section->vma |
2391 | + htab->sgotplt->output_offset | |
2392 | + 4), | |
2393 | htab->splt->contents + 2); | |
252b5132 | 2394 | bfd_put_32 (output_bfd, |
6725bdbf AM |
2395 | (htab->sgotplt->output_section->vma |
2396 | + htab->sgotplt->output_offset | |
2397 | + 8), | |
2398 | htab->splt->contents + 8); | |
252b5132 RH |
2399 | } |
2400 | ||
2401 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
2402 | really seem like the right value. */ | |
6725bdbf AM |
2403 | elf_section_data (htab->splt->output_section) |
2404 | ->this_hdr.sh_entsize = 4; | |
252b5132 RH |
2405 | } |
2406 | } | |
2407 | ||
12d0ee4a | 2408 | if (htab->sgotplt) |
252b5132 | 2409 | { |
12d0ee4a AM |
2410 | /* Fill in the first three entries in the global offset table. */ |
2411 | if (htab->sgotplt->_raw_size > 0) | |
2412 | { | |
2413 | bfd_put_32 (output_bfd, | |
2414 | (sdyn == NULL ? (bfd_vma) 0 | |
2415 | : sdyn->output_section->vma + sdyn->output_offset), | |
2416 | htab->sgotplt->contents); | |
2417 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4); | |
2418 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
2419 | } | |
252b5132 | 2420 | |
12d0ee4a AM |
2421 | elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4; |
2422 | } | |
252b5132 RH |
2423 | return true; |
2424 | } | |
2425 | ||
2426 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vec | |
2427 | #define TARGET_LITTLE_NAME "elf32-i386" | |
2428 | #define ELF_ARCH bfd_arch_i386 | |
2429 | #define ELF_MACHINE_CODE EM_386 | |
2430 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
2431 | |
2432 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 2433 | #define elf_backend_can_refcount 1 |
252b5132 RH |
2434 | #define elf_backend_want_got_plt 1 |
2435 | #define elf_backend_plt_readonly 1 | |
2436 | #define elf_backend_want_plt_sym 0 | |
2437 | #define elf_backend_got_header_size 12 | |
2438 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
2439 | ||
dd5724d5 AM |
2440 | #define elf_info_to_howto elf_i386_info_to_howto |
2441 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel | |
2442 | ||
dd5724d5 AM |
2443 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
2444 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
2445 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup | |
2446 | ||
2447 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
2448 | #define elf_backend_check_relocs elf_i386_check_relocs | |
0ac8d2ca | 2449 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
6725bdbf | 2450 | #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections |
0ac8d2ca | 2451 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
2452 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
2453 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
2454 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook | |
2455 | #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook | |
c5fccbec DJ |
2456 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
2457 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 2458 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
2459 | #define elf_backend_relocate_section elf_i386_relocate_section |
2460 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
dd5724d5 | 2461 | |
252b5132 | 2462 | #include "elf32-target.h" |