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 | ||
365 | case 128: /* Linux/MIPS elf_prpsinfo */ | |
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 | { | |
990 | if (!(elf_bad_symtab (abfd) | |
991 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
992 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
993 | && sym->st_shndx != SHN_COMMON)) | |
994 | { | |
995 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
996 | } | |
997 | } | |
998 | ||
999 | return NULL; | |
1000 | } | |
1001 | ||
1002 | /* Update the got entry reference counts for the section being removed. */ | |
1003 | ||
1004 | static boolean | |
1005 | elf_i386_gc_sweep_hook (abfd, info, sec, relocs) | |
dd5724d5 | 1006 | bfd *abfd; |
6725bdbf | 1007 | struct bfd_link_info *info; |
dd5724d5 AM |
1008 | asection *sec; |
1009 | const Elf_Internal_Rela *relocs; | |
252b5132 | 1010 | { |
dd5724d5 AM |
1011 | Elf_Internal_Shdr *symtab_hdr; |
1012 | struct elf_link_hash_entry **sym_hashes; | |
1013 | bfd_signed_vma *local_got_refcounts; | |
1014 | const Elf_Internal_Rela *rel, *relend; | |
1015 | unsigned long r_symndx; | |
1016 | struct elf_link_hash_entry *h; | |
dd5724d5 | 1017 | |
ec338859 | 1018 | elf_section_data (sec)->local_dynrel = NULL; |
dd5724d5 | 1019 | |
6725bdbf AM |
1020 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1021 | sym_hashes = elf_sym_hashes (abfd); | |
1022 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
dd5724d5 AM |
1023 | |
1024 | relend = relocs + sec->reloc_count; | |
1025 | for (rel = relocs; rel < relend; rel++) | |
1026 | switch (ELF32_R_TYPE (rel->r_info)) | |
1027 | { | |
1028 | case R_386_GOT32: | |
1029 | case R_386_GOTOFF: | |
1030 | case R_386_GOTPC: | |
1031 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1032 | if (r_symndx >= symtab_hdr->sh_info) | |
1033 | { | |
1034 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1035 | if (h->got.refcount > 0) | |
6725bdbf | 1036 | h->got.refcount -= 1; |
dd5724d5 AM |
1037 | } |
1038 | else if (local_got_refcounts != NULL) | |
1039 | { | |
1040 | if (local_got_refcounts[r_symndx] > 0) | |
6725bdbf | 1041 | local_got_refcounts[r_symndx] -= 1; |
dd5724d5 AM |
1042 | } |
1043 | break; | |
1044 | ||
6725bdbf AM |
1045 | case R_386_32: |
1046 | case R_386_PC32: | |
0c715baa AM |
1047 | r_symndx = ELF32_R_SYM (rel->r_info); |
1048 | if (r_symndx >= symtab_hdr->sh_info) | |
1049 | { | |
1050 | struct elf_i386_link_hash_entry *eh; | |
1051 | struct elf_i386_dyn_relocs **pp; | |
1052 | struct elf_i386_dyn_relocs *p; | |
1053 | ||
1054 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1055 | ||
1056 | if (!info->shared && h->plt.refcount > 0) | |
1057 | h->plt.refcount -= 1; | |
1058 | ||
1059 | eh = (struct elf_i386_link_hash_entry *) h; | |
1060 | ||
1061 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
1062 | if (p->sec == sec) | |
1063 | { | |
1064 | if (ELF32_R_TYPE (rel->r_info) == R_386_PC32) | |
1065 | p->pc_count -= 1; | |
1066 | p->count -= 1; | |
1067 | if (p->count == 0) | |
1068 | *pp = p->next; | |
1069 | break; | |
1070 | } | |
1071 | } | |
1072 | break; | |
6725bdbf | 1073 | |
dd5724d5 AM |
1074 | case R_386_PLT32: |
1075 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1076 | if (r_symndx >= symtab_hdr->sh_info) | |
1077 | { | |
1078 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1079 | if (h->plt.refcount > 0) | |
1080 | h->plt.refcount -= 1; | |
1081 | } | |
1082 | break; | |
1083 | ||
1084 | default: | |
1085 | break; | |
1086 | } | |
252b5132 RH |
1087 | |
1088 | return true; | |
1089 | } | |
1090 | ||
1091 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1092 | regular object. The current definition is in some section of the | |
1093 | dynamic object, but we're not including those sections. We have to | |
1094 | change the definition to something the rest of the link can | |
1095 | understand. */ | |
1096 | ||
1097 | static boolean | |
1098 | elf_i386_adjust_dynamic_symbol (info, h) | |
1099 | struct bfd_link_info *info; | |
1100 | struct elf_link_hash_entry *h; | |
1101 | { | |
6725bdbf | 1102 | struct elf_i386_link_hash_table *htab; |
ebe50bae AM |
1103 | struct elf_i386_link_hash_entry * eh; |
1104 | struct elf_i386_dyn_relocs *p; | |
252b5132 RH |
1105 | asection *s; |
1106 | unsigned int power_of_two; | |
1107 | ||
252b5132 RH |
1108 | /* If this is a function, put it in the procedure linkage table. We |
1109 | will fill in the contents of the procedure linkage table later, | |
1110 | when we know the address of the .got section. */ | |
1111 | if (h->type == STT_FUNC | |
1112 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
1113 | { | |
6725bdbf AM |
1114 | if (h->plt.refcount <= 0 |
1115 | || (! info->shared | |
1116 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
1117 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)) | |
252b5132 RH |
1118 | { |
1119 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
1120 | file, but the symbol was never referred to by a dynamic |
1121 | object, or if all references were garbage collected. In | |
1122 | such a case, we don't actually need to build a procedure | |
1123 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 1124 | h->plt.offset = (bfd_vma) -1; |
dd5724d5 | 1125 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
252b5132 RH |
1126 | } |
1127 | ||
252b5132 RH |
1128 | return true; |
1129 | } | |
6725bdbf AM |
1130 | else |
1131 | /* It's possible that we incorrectly decided a .plt reloc was | |
1132 | needed for an R_386_PC32 reloc to a non-function sym in | |
1133 | check_relocs. We can't decide accurately between function and | |
1134 | non-function syms in check-relocs; Objects loaded later in | |
1135 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1136 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
1137 | |
1138 | /* If this is a weak symbol, and there is a real definition, the | |
1139 | processor independent code will have arranged for us to see the | |
1140 | real definition first, and we can just use the same value. */ | |
1141 | if (h->weakdef != NULL) | |
1142 | { | |
1143 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1144 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1145 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1146 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
0a991dfe | 1147 | return true; |
252b5132 RH |
1148 | } |
1149 | ||
1150 | /* This is a reference to a symbol defined by a dynamic object which | |
1151 | is not a function. */ | |
1152 | ||
1153 | /* If we are creating a shared library, we must presume that the | |
1154 | only references to the symbol are via the global offset table. | |
1155 | For such cases we need not do anything here; the relocations will | |
1156 | be handled correctly by relocate_section. */ | |
1157 | if (info->shared) | |
1158 | return true; | |
1159 | ||
7843f00e ILT |
1160 | /* If there are no references to this symbol that do not use the |
1161 | GOT, we don't need to generate a copy reloc. */ | |
1162 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
1163 | return true; | |
1164 | ||
8bd621d8 AM |
1165 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1166 | if (info->nocopyreloc) | |
1167 | { | |
1168 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
1169 | return true; | |
1170 | } | |
1171 | ||
ebe50bae AM |
1172 | eh = (struct elf_i386_link_hash_entry *) h; |
1173 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1174 | { | |
1175 | s = p->sec->output_section; | |
1176 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1177 | break; | |
1178 | } | |
1179 | ||
1180 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1181 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1182 | if (p == NULL) | |
1183 | { | |
1184 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
1185 | return true; | |
1186 | } | |
1187 | ||
252b5132 RH |
1188 | /* We must allocate the symbol in our .dynbss section, which will |
1189 | become part of the .bss section of the executable. There will be | |
1190 | an entry for this symbol in the .dynsym section. The dynamic | |
1191 | object will contain position independent code, so all references | |
1192 | from the dynamic object to this symbol will go through the global | |
1193 | offset table. The dynamic linker will use the .dynsym entry to | |
1194 | determine the address it must put in the global offset table, so | |
1195 | both the dynamic object and the regular object will refer to the | |
1196 | same memory location for the variable. */ | |
1197 | ||
0ac8d2ca | 1198 | htab = elf_i386_hash_table (info); |
252b5132 RH |
1199 | |
1200 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to | |
1201 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 1202 | runtime process image. */ |
252b5132 RH |
1203 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1204 | { | |
0ac8d2ca | 1205 | htab->srelbss->_raw_size += sizeof (Elf32_External_Rel); |
252b5132 RH |
1206 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
1207 | } | |
1208 | ||
1209 | /* We need to figure out the alignment required for this symbol. I | |
1210 | have no idea how ELF linkers handle this. */ | |
1211 | power_of_two = bfd_log2 (h->size); | |
1212 | if (power_of_two > 3) | |
1213 | power_of_two = 3; | |
1214 | ||
1215 | /* Apply the required alignment. */ | |
0ac8d2ca AM |
1216 | s = htab->sdynbss; |
1217 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); | |
1218 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) | |
252b5132 | 1219 | { |
0ac8d2ca | 1220 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
252b5132 RH |
1221 | return false; |
1222 | } | |
1223 | ||
1224 | /* Define the symbol as being at this point in the section. */ | |
1225 | h->root.u.def.section = s; | |
1226 | h->root.u.def.value = s->_raw_size; | |
1227 | ||
1228 | /* Increment the section size to make room for the symbol. */ | |
1229 | s->_raw_size += h->size; | |
1230 | ||
1231 | return true; | |
1232 | } | |
1233 | ||
6725bdbf AM |
1234 | /* This is the condition under which elf_i386_finish_dynamic_symbol |
1235 | will be called from elflink.h. If elflink.h doesn't call our | |
1236 | finish_dynamic_symbol routine, we'll need to do something about | |
1237 | initializing any .plt and .got entries in elf_i386_relocate_section. */ | |
1238 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ | |
1239 | ((DYN) \ | |
1240 | && ((INFO)->shared \ | |
1241 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ | |
1242 | && ((H)->dynindx != -1 \ | |
1243 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
1244 | ||
1245 | /* Allocate space in .plt, .got and associated reloc sections for | |
0c715baa | 1246 | dynamic relocs. */ |
6725bdbf AM |
1247 | |
1248 | static boolean | |
0c715baa | 1249 | allocate_dynrelocs (h, inf) |
6725bdbf AM |
1250 | struct elf_link_hash_entry *h; |
1251 | PTR inf; | |
1252 | { | |
1253 | struct bfd_link_info *info; | |
1254 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 1255 | struct elf_i386_link_hash_entry *eh; |
0c715baa | 1256 | struct elf_i386_dyn_relocs *p; |
6725bdbf AM |
1257 | |
1258 | if (h->root.type == bfd_link_hash_indirect | |
1259 | || h->root.type == bfd_link_hash_warning) | |
1260 | return true; | |
1261 | ||
1262 | info = (struct bfd_link_info *) inf; | |
1263 | htab = elf_i386_hash_table (info); | |
1264 | ||
ebe50bae | 1265 | if (htab->elf.dynamic_sections_created |
6725bdbf AM |
1266 | && h->plt.refcount > 0) |
1267 | { | |
5a15f56f AM |
1268 | /* Make sure this symbol is output as a dynamic symbol. |
1269 | Undefined weak syms won't yet be marked as dynamic. */ | |
1270 | if (h->dynindx == -1 | |
1271 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1272 | { | |
1273 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
1274 | return false; | |
1275 | } | |
1276 | ||
ced53ee5 AM |
1277 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) |
1278 | { | |
0ac8d2ca | 1279 | asection *s = htab->splt; |
6725bdbf | 1280 | |
ced53ee5 AM |
1281 | /* If this is the first .plt entry, make room for the special |
1282 | first entry. */ | |
1283 | if (s->_raw_size == 0) | |
1284 | s->_raw_size += PLT_ENTRY_SIZE; | |
6725bdbf | 1285 | |
ced53ee5 | 1286 | h->plt.offset = s->_raw_size; |
6725bdbf | 1287 | |
ced53ee5 AM |
1288 | /* If this symbol is not defined in a regular file, and we are |
1289 | not generating a shared library, then set the symbol to this | |
1290 | location in the .plt. This is required to make function | |
1291 | pointers compare as equal between the normal executable and | |
1292 | the shared library. */ | |
1293 | if (! info->shared | |
1294 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1295 | { | |
1296 | h->root.u.def.section = s; | |
1297 | h->root.u.def.value = h->plt.offset; | |
1298 | } | |
6725bdbf | 1299 | |
ced53ee5 AM |
1300 | /* Make room for this entry. */ |
1301 | s->_raw_size += PLT_ENTRY_SIZE; | |
6725bdbf | 1302 | |
ced53ee5 AM |
1303 | /* We also need to make an entry in the .got.plt section, which |
1304 | will be placed in the .got section by the linker script. */ | |
0ac8d2ca | 1305 | htab->sgotplt->_raw_size += 4; |
6725bdbf | 1306 | |
6725bdbf | 1307 | /* We also need to make an entry in the .rel.plt section. */ |
0ac8d2ca | 1308 | htab->srelplt->_raw_size += sizeof (Elf32_External_Rel); |
6725bdbf | 1309 | } |
ced53ee5 AM |
1310 | else |
1311 | { | |
51b64d56 | 1312 | h->plt.offset = (bfd_vma) -1; |
ced53ee5 AM |
1313 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
1314 | } | |
6725bdbf AM |
1315 | } |
1316 | else | |
1317 | { | |
51b64d56 | 1318 | h->plt.offset = (bfd_vma) -1; |
6725bdbf AM |
1319 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
1320 | } | |
1321 | ||
1322 | if (h->got.refcount > 0) | |
1323 | { | |
0ac8d2ca | 1324 | asection *s; |
6725bdbf AM |
1325 | boolean dyn; |
1326 | ||
5a15f56f AM |
1327 | /* Make sure this symbol is output as a dynamic symbol. |
1328 | Undefined weak syms won't yet be marked as dynamic. */ | |
1329 | if (h->dynindx == -1 | |
1330 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1331 | { | |
1332 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
1333 | return false; | |
1334 | } | |
1335 | ||
6725bdbf AM |
1336 | s = htab->sgot; |
1337 | h->got.offset = s->_raw_size; | |
1338 | s->_raw_size += 4; | |
ebe50bae | 1339 | dyn = htab->elf.dynamic_sections_created; |
6725bdbf AM |
1340 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) |
1341 | htab->srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
1342 | } | |
1343 | else | |
51b64d56 | 1344 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 1345 | |
5a15f56f AM |
1346 | eh = (struct elf_i386_link_hash_entry *) h; |
1347 | if (eh->dyn_relocs == NULL) | |
1348 | return true; | |
1349 | ||
0c715baa AM |
1350 | /* In the shared -Bsymbolic case, discard space allocated for |
1351 | dynamic pc-relative relocs against symbols which turn out to be | |
1352 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
1353 | space for pc-relative relocs that have become local due to symbol |
1354 | visibility changes. */ | |
0c715baa AM |
1355 | |
1356 | if (info->shared) | |
5a15f56f | 1357 | { |
0c715baa AM |
1358 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
1359 | && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
1360 | || info->symbolic)) | |
5a15f56f | 1361 | { |
0c715baa AM |
1362 | struct elf_i386_dyn_relocs **pp; |
1363 | ||
1364 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1365 | { | |
1366 | p->count -= p->pc_count; | |
1367 | p->pc_count = 0; | |
1368 | if (p->count == 0) | |
1369 | *pp = p->next; | |
1370 | else | |
1371 | pp = &p->next; | |
1372 | } | |
5a15f56f | 1373 | } |
0c715baa AM |
1374 | } |
1375 | else | |
1376 | { | |
1377 | /* For the non-shared case, discard space for relocs against | |
1378 | symbols which turn out to need copy relocs or are not | |
1379 | dynamic. */ | |
1380 | ||
1381 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
1382 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1383 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
ebe50bae | 1384 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
1385 | && (h->root.type == bfd_link_hash_undefweak |
1386 | || h->root.type == bfd_link_hash_undefined)))) | |
1387 | { | |
1388 | /* Make sure this symbol is output as a dynamic symbol. | |
1389 | Undefined weak syms won't yet be marked as dynamic. */ | |
1390 | if (h->dynindx == -1 | |
1391 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1392 | { | |
1393 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
1394 | return false; | |
1395 | } | |
5a15f56f | 1396 | |
0c715baa AM |
1397 | /* If that succeeded, we know we'll be keeping all the |
1398 | relocs. */ | |
1399 | if (h->dynindx != -1) | |
1400 | goto keep; | |
1401 | } | |
1402 | ||
1403 | eh->dyn_relocs = NULL; | |
1404 | ||
ec338859 | 1405 | keep: ; |
5a15f56f AM |
1406 | } |
1407 | ||
0c715baa AM |
1408 | /* Finally, allocate space. */ |
1409 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 1410 | { |
0c715baa AM |
1411 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
1412 | sreloc->_raw_size += p->count * sizeof (Elf32_External_Rel); | |
12d0ee4a AM |
1413 | } |
1414 | ||
6725bdbf AM |
1415 | return true; |
1416 | } | |
1417 | ||
0c715baa AM |
1418 | /* Find any dynamic relocs that apply to read-only sections. */ |
1419 | ||
1420 | static boolean | |
1421 | readonly_dynrelocs (h, inf) | |
1422 | struct elf_link_hash_entry *h; | |
1423 | PTR inf; | |
1424 | { | |
1425 | struct elf_i386_link_hash_entry *eh; | |
1426 | struct elf_i386_dyn_relocs *p; | |
1427 | ||
1428 | eh = (struct elf_i386_link_hash_entry *) h; | |
1429 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1430 | { | |
1431 | asection *s = p->sec->output_section; | |
1432 | ||
1433 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1434 | { | |
1435 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1436 | ||
1437 | info->flags |= DF_TEXTREL; | |
1438 | ||
1439 | /* Not an error, just cut short the traversal. */ | |
1440 | return false; | |
1441 | } | |
1442 | } | |
1443 | return true; | |
1444 | } | |
1445 | ||
252b5132 RH |
1446 | /* Set the sizes of the dynamic sections. */ |
1447 | ||
1448 | static boolean | |
1449 | elf_i386_size_dynamic_sections (output_bfd, info) | |
db6751f2 | 1450 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1451 | struct bfd_link_info *info; |
1452 | { | |
6725bdbf | 1453 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1454 | bfd *dynobj; |
1455 | asection *s; | |
252b5132 | 1456 | boolean relocs; |
0c715baa | 1457 | bfd *ibfd; |
252b5132 | 1458 | |
6725bdbf | 1459 | htab = elf_i386_hash_table (info); |
ebe50bae | 1460 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
1461 | if (dynobj == NULL) |
1462 | abort (); | |
252b5132 | 1463 | |
ebe50bae | 1464 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
1465 | { |
1466 | /* Set the contents of the .interp section to the interpreter. */ | |
1467 | if (! info->shared) | |
1468 | { | |
1469 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
ffb2e45b AM |
1470 | if (s == NULL) |
1471 | abort (); | |
252b5132 RH |
1472 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
1473 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1474 | } | |
161d71a6 | 1475 | } |
6725bdbf | 1476 | |
0c715baa AM |
1477 | /* Set up .got offsets for local syms, and space for local dynamic |
1478 | relocs. */ | |
1479 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
161d71a6 L |
1480 | { |
1481 | bfd_signed_vma *local_got; | |
1482 | bfd_signed_vma *end_local_got; | |
1483 | bfd_size_type locsymcount; | |
1484 | Elf_Internal_Shdr *symtab_hdr; | |
1485 | asection *srel; | |
6725bdbf | 1486 | |
0c715baa | 1487 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
161d71a6 | 1488 | continue; |
6725bdbf | 1489 | |
0c715baa AM |
1490 | for (s = ibfd->sections; s != NULL; s = s->next) |
1491 | { | |
ec338859 | 1492 | struct elf_i386_dyn_relocs *p; |
0c715baa | 1493 | |
ec338859 AM |
1494 | for (p = *((struct elf_i386_dyn_relocs **) |
1495 | &elf_section_data (s)->local_dynrel); | |
1496 | p != NULL; | |
1497 | p = p->next) | |
0c715baa | 1498 | { |
ec338859 AM |
1499 | if (!bfd_is_abs_section (p->sec) |
1500 | && bfd_is_abs_section (p->sec->output_section)) | |
1501 | { | |
1502 | /* Input section has been discarded, either because | |
1503 | it is a copy of a linkonce section or due to | |
1504 | linker script /DISCARD/, so we'll be discarding | |
1505 | the relocs too. */ | |
1506 | } | |
1507 | else | |
1508 | { | |
1509 | srel = elf_section_data (p->sec)->sreloc; | |
1510 | srel->_raw_size += p->count * sizeof (Elf32_External_Rel); | |
1511 | } | |
0c715baa AM |
1512 | } |
1513 | } | |
1514 | ||
1515 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
1516 | if (!local_got) |
1517 | continue; | |
6725bdbf | 1518 | |
0c715baa | 1519 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
161d71a6 L |
1520 | locsymcount = symtab_hdr->sh_info; |
1521 | end_local_got = local_got + locsymcount; | |
1522 | s = htab->sgot; | |
1523 | srel = htab->srelgot; | |
1524 | for (; local_got < end_local_got; ++local_got) | |
1525 | { | |
1526 | if (*local_got > 0) | |
6725bdbf | 1527 | { |
161d71a6 L |
1528 | *local_got = s->_raw_size; |
1529 | s->_raw_size += 4; | |
1530 | if (info->shared) | |
1531 | srel->_raw_size += sizeof (Elf32_External_Rel); | |
6725bdbf | 1532 | } |
161d71a6 L |
1533 | else |
1534 | *local_got = (bfd_vma) -1; | |
6725bdbf | 1535 | } |
252b5132 | 1536 | } |
6725bdbf | 1537 | |
0c715baa AM |
1538 | /* Allocate global sym .plt and .got entries, and space for global |
1539 | sym dynamic relocs. */ | |
ebe50bae | 1540 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); |
252b5132 | 1541 | |
5a15f56f AM |
1542 | /* We now have determined the sizes of the various dynamic sections. |
1543 | Allocate memory for them. */ | |
252b5132 | 1544 | relocs = false; |
252b5132 RH |
1545 | for (s = dynobj->sections; s != NULL; s = s->next) |
1546 | { | |
252b5132 RH |
1547 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
1548 | continue; | |
1549 | ||
6725bdbf AM |
1550 | if (s == htab->splt |
1551 | || s == htab->sgot | |
1552 | || s == htab->sgotplt) | |
252b5132 | 1553 | { |
6725bdbf AM |
1554 | /* Strip this section if we don't need it; see the |
1555 | comment below. */ | |
252b5132 | 1556 | } |
6725bdbf | 1557 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0) |
252b5132 | 1558 | { |
0ac8d2ca AM |
1559 | if (s->_raw_size != 0 && s != htab->srelplt) |
1560 | relocs = true; | |
252b5132 | 1561 | |
0ac8d2ca AM |
1562 | /* We use the reloc_count field as a counter if we need |
1563 | to copy relocs into the output file. */ | |
1564 | s->reloc_count = 0; | |
252b5132 | 1565 | } |
6725bdbf | 1566 | else |
252b5132 RH |
1567 | { |
1568 | /* It's not one of our sections, so don't allocate space. */ | |
1569 | continue; | |
1570 | } | |
1571 | ||
6725bdbf | 1572 | if (s->_raw_size == 0) |
252b5132 | 1573 | { |
0ac8d2ca AM |
1574 | /* If we don't need this section, strip it from the |
1575 | output file. This is mostly to handle .rel.bss and | |
1576 | .rel.plt. We must create both sections in | |
1577 | create_dynamic_sections, because they must be created | |
1578 | before the linker maps input sections to output | |
1579 | sections. The linker does that before | |
1580 | adjust_dynamic_symbol is called, and it is that | |
1581 | function which decides whether anything needs to go | |
1582 | into these sections. */ | |
1583 | ||
7f8d5fc9 | 1584 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
1585 | continue; |
1586 | } | |
1587 | ||
f69da49f AM |
1588 | /* Allocate memory for the section contents. We use bfd_zalloc |
1589 | here in case unused entries are not reclaimed before the | |
1590 | section's contents are written out. This should not happen, | |
1591 | but this way if it does, we get a R_386_NONE reloc instead | |
1592 | of garbage. */ | |
7a9af8c4 | 1593 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
6725bdbf | 1594 | if (s->contents == NULL) |
252b5132 RH |
1595 | return false; |
1596 | } | |
1597 | ||
ebe50bae | 1598 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
1599 | { |
1600 | /* Add some entries to the .dynamic section. We fill in the | |
1601 | values later, in elf_i386_finish_dynamic_sections, but we | |
1602 | must add the entries now so that we get the correct size for | |
1603 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1604 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
1605 | #define add_dynamic_entry(TAG, VAL) \ |
1606 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
1607 | ||
252b5132 RH |
1608 | if (! info->shared) |
1609 | { | |
dc810e39 | 1610 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
252b5132 RH |
1611 | return false; |
1612 | } | |
1613 | ||
6725bdbf | 1614 | if (htab->splt->_raw_size != 0) |
252b5132 | 1615 | { |
dc810e39 AM |
1616 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1617 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1618 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
1619 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
252b5132 RH |
1620 | return false; |
1621 | } | |
1622 | ||
1623 | if (relocs) | |
1624 | { | |
dc810e39 AM |
1625 | if (!add_dynamic_entry (DT_REL, 0) |
1626 | || !add_dynamic_entry (DT_RELSZ, 0) | |
1627 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
252b5132 | 1628 | return false; |
252b5132 | 1629 | |
0c715baa AM |
1630 | /* If any dynamic relocs apply to a read-only section, |
1631 | then we need a DT_TEXTREL entry. */ | |
ebe50bae | 1632 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, (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 = | |
1792 | _bfd_merged_section_offset (output_bfd, &msec, | |
1793 | elf_section_data (sec)->merge_info, | |
1794 | sym->st_value + addend, (bfd_vma) 0) | |
1795 | - relocation; | |
1796 | addend += msec->output_section->vma + msec->output_offset; | |
1797 | bfd_put_32 (input_bfd, addend, contents + rel->r_offset); | |
1798 | } | |
252b5132 RH |
1799 | } |
1800 | else | |
1801 | { | |
1802 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1803 | while (h->root.type == bfd_link_hash_indirect | |
1804 | || h->root.type == bfd_link_hash_warning) | |
1805 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
ffb2e45b | 1806 | |
6725bdbf | 1807 | relocation = 0; |
252b5132 RH |
1808 | if (h->root.type == bfd_link_hash_defined |
1809 | || h->root.type == bfd_link_hash_defweak) | |
1810 | { | |
1811 | sec = h->root.u.def.section; | |
83be169b AM |
1812 | if (sec->output_section == NULL) |
1813 | /* Set a flag that will be cleared later if we find a | |
1814 | relocation value for this symbol. output_section | |
1815 | is typically NULL for symbols satisfied by a shared | |
1816 | library. */ | |
1817 | unresolved_reloc = true; | |
252b5132 RH |
1818 | else |
1819 | relocation = (h->root.u.def.value | |
1820 | + sec->output_section->vma | |
1821 | + sec->output_offset); | |
1822 | } | |
1823 | else if (h->root.type == bfd_link_hash_undefweak) | |
6725bdbf | 1824 | ; |
671bae9c NC |
1825 | else if (info->shared |
1826 | && (!info->symbolic || info->allow_shlib_undefined) | |
3a27a730 L |
1827 | && !info->no_undefined |
1828 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
6725bdbf | 1829 | ; |
252b5132 RH |
1830 | else |
1831 | { | |
1832 | if (! ((*info->callbacks->undefined_symbol) | |
1833 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 1834 | input_section, rel->r_offset, |
3a27a730 L |
1835 | (!info->shared || info->no_undefined |
1836 | || ELF_ST_VISIBILITY (h->other))))) | |
252b5132 | 1837 | return false; |
252b5132 RH |
1838 | } |
1839 | } | |
1840 | ||
1841 | switch (r_type) | |
1842 | { | |
1843 | case R_386_GOT32: | |
1844 | /* Relocation is to the entry for this symbol in the global | |
1845 | offset table. */ | |
ffb2e45b AM |
1846 | if (htab->sgot == NULL) |
1847 | abort (); | |
252b5132 RH |
1848 | |
1849 | if (h != NULL) | |
1850 | { | |
6725bdbf | 1851 | boolean dyn; |
252b5132 RH |
1852 | |
1853 | off = h->got.offset; | |
ebe50bae | 1854 | dyn = htab->elf.dynamic_sections_created; |
6725bdbf | 1855 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) |
252b5132 | 1856 | || (info->shared |
6725bdbf AM |
1857 | && (info->symbolic |
1858 | || h->dynindx == -1 | |
1859 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
252b5132 RH |
1860 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
1861 | { | |
1862 | /* This is actually a static link, or it is a | |
1863 | -Bsymbolic link and the symbol is defined | |
1864 | locally, or the symbol was forced to be local | |
1865 | because of a version file. We must initialize | |
1866 | this entry in the global offset table. Since the | |
1867 | offset must always be a multiple of 4, we use the | |
1868 | least significant bit to record whether we have | |
1869 | initialized it already. | |
1870 | ||
1871 | When doing a dynamic link, we create a .rel.got | |
1872 | relocation entry to initialize the value. This | |
1873 | is done in the finish_dynamic_symbol routine. */ | |
1874 | if ((off & 1) != 0) | |
1875 | off &= ~1; | |
1876 | else | |
1877 | { | |
1878 | bfd_put_32 (output_bfd, relocation, | |
6725bdbf | 1879 | htab->sgot->contents + off); |
252b5132 RH |
1880 | h->got.offset |= 1; |
1881 | } | |
1882 | } | |
8c694914 AM |
1883 | else |
1884 | unresolved_reloc = false; | |
252b5132 RH |
1885 | } |
1886 | else | |
1887 | { | |
ffb2e45b AM |
1888 | if (local_got_offsets == NULL) |
1889 | abort (); | |
252b5132 RH |
1890 | |
1891 | off = local_got_offsets[r_symndx]; | |
1892 | ||
1893 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
1894 | the least significant bit to record whether we have |
1895 | already generated the necessary reloc. */ | |
252b5132 RH |
1896 | if ((off & 1) != 0) |
1897 | off &= ~1; | |
1898 | else | |
1899 | { | |
6725bdbf AM |
1900 | bfd_put_32 (output_bfd, relocation, |
1901 | htab->sgot->contents + off); | |
252b5132 RH |
1902 | |
1903 | if (info->shared) | |
1904 | { | |
1905 | asection *srelgot; | |
1906 | Elf_Internal_Rel outrel; | |
0ac8d2ca | 1907 | Elf32_External_Rel *loc; |
252b5132 | 1908 | |
6725bdbf | 1909 | srelgot = htab->srelgot; |
ffb2e45b AM |
1910 | if (srelgot == NULL) |
1911 | abort (); | |
252b5132 | 1912 | |
6725bdbf AM |
1913 | outrel.r_offset = (htab->sgot->output_section->vma |
1914 | + htab->sgot->output_offset | |
252b5132 RH |
1915 | + off); |
1916 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
0ac8d2ca AM |
1917 | loc = (Elf32_External_Rel *) srelgot->contents; |
1918 | loc += srelgot->reloc_count++; | |
1919 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
252b5132 RH |
1920 | } |
1921 | ||
1922 | local_got_offsets[r_symndx] |= 1; | |
1923 | } | |
252b5132 RH |
1924 | } |
1925 | ||
ffb2e45b AM |
1926 | if (off >= (bfd_vma) -2) |
1927 | abort (); | |
1928 | ||
1929 | relocation = htab->sgot->output_offset + off; | |
252b5132 RH |
1930 | break; |
1931 | ||
1932 | case R_386_GOTOFF: | |
1933 | /* Relocation is relative to the start of the global offset | |
1934 | table. */ | |
1935 | ||
252b5132 RH |
1936 | /* Note that sgot->output_offset is not involved in this |
1937 | calculation. We always want the start of .got. If we | |
1938 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
1939 | permitted by the ABI, we might have to change this | |
1940 | calculation. */ | |
6725bdbf | 1941 | relocation -= htab->sgot->output_section->vma; |
252b5132 RH |
1942 | break; |
1943 | ||
1944 | case R_386_GOTPC: | |
1945 | /* Use global offset table as symbol value. */ | |
6725bdbf | 1946 | relocation = htab->sgot->output_section->vma; |
83be169b | 1947 | unresolved_reloc = false; |
252b5132 RH |
1948 | break; |
1949 | ||
1950 | case R_386_PLT32: | |
1951 | /* Relocation is to the entry for this symbol in the | |
1952 | procedure linkage table. */ | |
1953 | ||
dd5724d5 | 1954 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 1955 | without using the procedure linkage table. */ |
252b5132 RH |
1956 | if (h == NULL) |
1957 | break; | |
1958 | ||
dd5724d5 | 1959 | if (h->plt.offset == (bfd_vma) -1 |
6725bdbf | 1960 | || htab->splt == NULL) |
252b5132 RH |
1961 | { |
1962 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
1963 | happens when statically linking PIC code, or when |
1964 | using -Bsymbolic. */ | |
252b5132 RH |
1965 | break; |
1966 | } | |
1967 | ||
6725bdbf AM |
1968 | relocation = (htab->splt->output_section->vma |
1969 | + htab->splt->output_offset | |
252b5132 | 1970 | + h->plt.offset); |
83be169b | 1971 | unresolved_reloc = false; |
252b5132 RH |
1972 | break; |
1973 | ||
1974 | case R_386_32: | |
1975 | case R_386_PC32: | |
ec338859 AM |
1976 | /* r_symndx will be zero only for relocs against symbols |
1977 | from removed linkonce sections, or sections discarded by | |
1978 | a linker script. */ | |
1979 | if (r_symndx == 0 | |
1980 | || (input_section->flags & SEC_ALLOC) == 0) | |
1981 | break; | |
1982 | ||
12d0ee4a | 1983 | if ((info->shared |
12d0ee4a AM |
1984 | && (r_type != R_386_PC32 |
1985 | || (h != NULL | |
1986 | && h->dynindx != -1 | |
1987 | && (! info->symbolic | |
1988 | || (h->elf_link_hash_flags | |
1989 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
1990 | || (!info->shared | |
12d0ee4a AM |
1991 | && h != NULL |
1992 | && h->dynindx != -1 | |
1993 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
56882138 AM |
1994 | && (((h->elf_link_hash_flags |
1995 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1996 | && (h->elf_link_hash_flags | |
1997 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
28d0b90e AM |
1998 | || h->root.type == bfd_link_hash_undefweak |
1999 | || h->root.type == bfd_link_hash_undefined))) | |
252b5132 RH |
2000 | { |
2001 | Elf_Internal_Rel outrel; | |
2002 | boolean skip, relocate; | |
0c715baa AM |
2003 | asection *sreloc; |
2004 | Elf32_External_Rel *loc; | |
252b5132 RH |
2005 | |
2006 | /* When generating a shared object, these relocations | |
2007 | are copied into the output file to be resolved at run | |
2008 | time. */ | |
2009 | ||
252b5132 RH |
2010 | skip = false; |
2011 | ||
2012 | if (elf_section_data (input_section)->stab_info == NULL) | |
2013 | outrel.r_offset = rel->r_offset; | |
2014 | else | |
2015 | { | |
252b5132 | 2016 | off = (_bfd_stab_section_offset |
ebe50bae | 2017 | (output_bfd, htab->elf.stab_info, input_section, |
252b5132 RH |
2018 | &elf_section_data (input_section)->stab_info, |
2019 | rel->r_offset)); | |
2020 | if (off == (bfd_vma) -1) | |
2021 | skip = true; | |
2022 | outrel.r_offset = off; | |
2023 | } | |
2024 | ||
2025 | outrel.r_offset += (input_section->output_section->vma | |
2026 | + input_section->output_offset); | |
2027 | ||
2028 | if (skip) | |
2029 | { | |
2030 | memset (&outrel, 0, sizeof outrel); | |
2031 | relocate = false; | |
2032 | } | |
5a15f56f AM |
2033 | else if (h != NULL |
2034 | && h->dynindx != -1 | |
2035 | && (r_type == R_386_PC32 | |
2036 | || !info->shared | |
2037 | || !info->symbolic | |
2038 | || (h->elf_link_hash_flags | |
2039 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
2040 | ||
252b5132 | 2041 | { |
252b5132 | 2042 | relocate = false; |
5a15f56f | 2043 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
2044 | } |
2045 | else | |
2046 | { | |
5a15f56f AM |
2047 | /* This symbol is local, or marked to become local. */ |
2048 | relocate = true; | |
2049 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
252b5132 RH |
2050 | } |
2051 | ||
0c715baa AM |
2052 | sreloc = elf_section_data (input_section)->sreloc; |
2053 | if (sreloc == NULL) | |
2054 | abort (); | |
2055 | ||
0ac8d2ca AM |
2056 | loc = (Elf32_External_Rel *) sreloc->contents; |
2057 | loc += sreloc->reloc_count++; | |
0c715baa | 2058 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
252b5132 RH |
2059 | |
2060 | /* If this reloc is against an external symbol, we do | |
2061 | not want to fiddle with the addend. Otherwise, we | |
2062 | need to include the symbol value so that it becomes | |
2063 | an addend for the dynamic reloc. */ | |
2064 | if (! relocate) | |
2065 | continue; | |
2066 | } | |
252b5132 RH |
2067 | break; |
2068 | ||
2069 | default: | |
2070 | break; | |
2071 | } | |
2072 | ||
8c694914 AM |
2073 | /* FIXME: Why do we allow debugging sections to escape this error? |
2074 | More importantly, why do we not emit dynamic relocs for | |
2075 | R_386_32 above in debugging sections (which are ! SEC_ALLOC)? | |
2076 | If we had emitted the dynamic reloc, we could remove the | |
2077 | fudge here. */ | |
2078 | if (unresolved_reloc | |
2079 | && !(info->shared | |
2080 | && (input_section->flags & SEC_DEBUGGING) != 0 | |
2081 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) | |
83be169b AM |
2082 | (*_bfd_error_handler) |
2083 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), | |
8f615d07 | 2084 | bfd_archive_filename (input_bfd), |
83be169b AM |
2085 | bfd_get_section_name (input_bfd, input_section), |
2086 | (long) rel->r_offset, | |
2087 | h->root.root.string); | |
2088 | ||
252b5132 RH |
2089 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
2090 | contents, rel->r_offset, | |
2091 | relocation, (bfd_vma) 0); | |
2092 | ||
cf5c0c5b | 2093 | if (r != bfd_reloc_ok) |
252b5132 | 2094 | { |
cf5c0c5b | 2095 | const char *name; |
ffb2e45b | 2096 | |
cf5c0c5b AM |
2097 | if (h != NULL) |
2098 | name = h->root.root.string; | |
2099 | else | |
2100 | { | |
2101 | name = bfd_elf_string_from_elf_section (input_bfd, | |
2102 | symtab_hdr->sh_link, | |
2103 | sym->st_name); | |
2104 | if (name == NULL) | |
2105 | return false; | |
2106 | if (*name == '\0') | |
2107 | name = bfd_section_name (input_bfd, sec); | |
2108 | } | |
ffb2e45b | 2109 | |
cf5c0c5b AM |
2110 | if (r == bfd_reloc_overflow) |
2111 | { | |
2112 | ||
2113 | if (! ((*info->callbacks->reloc_overflow) | |
2114 | (info, name, howto->name, (bfd_vma) 0, | |
2115 | input_bfd, input_section, rel->r_offset))) | |
2116 | return false; | |
2117 | } | |
2118 | else | |
2119 | { | |
2120 | (*_bfd_error_handler) | |
2121 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), | |
2122 | bfd_archive_filename (input_bfd), | |
2123 | bfd_get_section_name (input_bfd, input_section), | |
2124 | (long) rel->r_offset, name, (int) r); | |
2125 | return false; | |
2126 | } | |
252b5132 RH |
2127 | } |
2128 | } | |
2129 | ||
2130 | return true; | |
2131 | } | |
2132 | ||
2133 | /* Finish up dynamic symbol handling. We set the contents of various | |
2134 | dynamic sections here. */ | |
2135 | ||
2136 | static boolean | |
2137 | elf_i386_finish_dynamic_symbol (output_bfd, info, h, sym) | |
2138 | bfd *output_bfd; | |
2139 | struct bfd_link_info *info; | |
2140 | struct elf_link_hash_entry *h; | |
2141 | Elf_Internal_Sym *sym; | |
2142 | { | |
6725bdbf | 2143 | struct elf_i386_link_hash_table *htab; |
252b5132 | 2144 | |
6725bdbf | 2145 | htab = elf_i386_hash_table (info); |
252b5132 RH |
2146 | |
2147 | if (h->plt.offset != (bfd_vma) -1) | |
2148 | { | |
252b5132 RH |
2149 | bfd_vma plt_index; |
2150 | bfd_vma got_offset; | |
2151 | Elf_Internal_Rel rel; | |
0ac8d2ca | 2152 | Elf32_External_Rel *loc; |
252b5132 RH |
2153 | |
2154 | /* This symbol has an entry in the procedure linkage table. Set | |
2155 | it up. */ | |
2156 | ||
ffb2e45b AM |
2157 | if (h->dynindx == -1 |
2158 | || htab->splt == NULL | |
2159 | || htab->sgotplt == NULL | |
2160 | || htab->srelplt == NULL) | |
2161 | abort (); | |
252b5132 RH |
2162 | |
2163 | /* Get the index in the procedure linkage table which | |
2164 | corresponds to this symbol. This is the index of this symbol | |
2165 | in all the symbols for which we are making plt entries. The | |
2166 | first entry in the procedure linkage table is reserved. */ | |
2167 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2168 | ||
2169 | /* Get the offset into the .got table of the entry that | |
2170 | corresponds to this function. Each .got entry is 4 bytes. | |
2171 | The first three are reserved. */ | |
2172 | got_offset = (plt_index + 3) * 4; | |
2173 | ||
2174 | /* Fill in the entry in the procedure linkage table. */ | |
2175 | if (! info->shared) | |
2176 | { | |
6725bdbf | 2177 | memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry, |
252b5132 RH |
2178 | PLT_ENTRY_SIZE); |
2179 | bfd_put_32 (output_bfd, | |
6725bdbf AM |
2180 | (htab->sgotplt->output_section->vma |
2181 | + htab->sgotplt->output_offset | |
252b5132 | 2182 | + got_offset), |
6725bdbf | 2183 | htab->splt->contents + h->plt.offset + 2); |
252b5132 RH |
2184 | } |
2185 | else | |
2186 | { | |
6725bdbf | 2187 | memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry, |
252b5132 RH |
2188 | PLT_ENTRY_SIZE); |
2189 | bfd_put_32 (output_bfd, got_offset, | |
6725bdbf | 2190 | htab->splt->contents + h->plt.offset + 2); |
252b5132 RH |
2191 | } |
2192 | ||
2193 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel), | |
6725bdbf | 2194 | htab->splt->contents + h->plt.offset + 7); |
252b5132 | 2195 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), |
6725bdbf | 2196 | htab->splt->contents + h->plt.offset + 12); |
252b5132 RH |
2197 | |
2198 | /* Fill in the entry in the global offset table. */ | |
2199 | bfd_put_32 (output_bfd, | |
6725bdbf AM |
2200 | (htab->splt->output_section->vma |
2201 | + htab->splt->output_offset | |
252b5132 RH |
2202 | + h->plt.offset |
2203 | + 6), | |
6725bdbf | 2204 | htab->sgotplt->contents + got_offset); |
252b5132 RH |
2205 | |
2206 | /* Fill in the entry in the .rel.plt section. */ | |
6725bdbf AM |
2207 | rel.r_offset = (htab->sgotplt->output_section->vma |
2208 | + htab->sgotplt->output_offset | |
252b5132 RH |
2209 | + got_offset); |
2210 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
0ac8d2ca AM |
2211 | loc = (Elf32_External_Rel *) htab->srelplt->contents + plt_index; |
2212 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
2213 | |
2214 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2215 | { | |
2216 | /* Mark the symbol as undefined, rather than as defined in | |
51b64d56 AM |
2217 | the .plt section. Leave the value alone. This is a clue |
2218 | for the dynamic linker, to make function pointer | |
2219 | comparisons work between an application and shared | |
2220 | library. */ | |
252b5132 RH |
2221 | sym->st_shndx = SHN_UNDEF; |
2222 | } | |
2223 | } | |
2224 | ||
2225 | if (h->got.offset != (bfd_vma) -1) | |
2226 | { | |
252b5132 | 2227 | Elf_Internal_Rel rel; |
0ac8d2ca | 2228 | Elf32_External_Rel *loc; |
252b5132 RH |
2229 | |
2230 | /* This symbol has an entry in the global offset table. Set it | |
2231 | up. */ | |
2232 | ||
ffb2e45b AM |
2233 | if (htab->sgot == NULL || htab->srelgot == NULL) |
2234 | abort (); | |
252b5132 | 2235 | |
6725bdbf AM |
2236 | rel.r_offset = (htab->sgot->output_section->vma |
2237 | + htab->sgot->output_offset | |
dc810e39 | 2238 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 2239 | |
dd5724d5 AM |
2240 | /* If this is a static link, or it is a -Bsymbolic link and the |
2241 | symbol is defined locally or was forced to be local because | |
2242 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
2243 | The entry in the global offset table will already have been |
2244 | initialized in the relocate_section function. */ | |
6725bdbf AM |
2245 | if (info->shared |
2246 | && (info->symbolic | |
2247 | || h->dynindx == -1 | |
2248 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
2249 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
dd5724d5 | 2250 | { |
6725bdbf | 2251 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
2252 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
2253 | } | |
252b5132 RH |
2254 | else |
2255 | { | |
dd5724d5 | 2256 | BFD_ASSERT((h->got.offset & 1) == 0); |
6725bdbf AM |
2257 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
2258 | htab->sgot->contents + h->got.offset); | |
252b5132 RH |
2259 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
2260 | } | |
2261 | ||
0ac8d2ca AM |
2262 | loc = (Elf32_External_Rel *) htab->srelgot->contents; |
2263 | loc += htab->srelgot->reloc_count++; | |
2264 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
2265 | } |
2266 | ||
791987af | 2267 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
252b5132 | 2268 | { |
252b5132 | 2269 | Elf_Internal_Rel rel; |
0ac8d2ca | 2270 | Elf32_External_Rel *loc; |
252b5132 RH |
2271 | |
2272 | /* This symbol needs a copy reloc. Set it up. */ | |
2273 | ||
ffb2e45b AM |
2274 | if (h->dynindx == -1 |
2275 | || (h->root.type != bfd_link_hash_defined | |
2276 | && h->root.type != bfd_link_hash_defweak) | |
2277 | || htab->srelbss == NULL) | |
2278 | abort (); | |
252b5132 RH |
2279 | |
2280 | rel.r_offset = (h->root.u.def.value | |
2281 | + h->root.u.def.section->output_section->vma | |
2282 | + h->root.u.def.section->output_offset); | |
2283 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
0ac8d2ca AM |
2284 | loc = (Elf32_External_Rel *) htab->srelbss->contents; |
2285 | loc += htab->srelbss->reloc_count++; | |
2286 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
2287 | } |
2288 | ||
2289 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2290 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2291 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2292 | sym->st_shndx = SHN_ABS; | |
2293 | ||
2294 | return true; | |
2295 | } | |
2296 | ||
38701953 AM |
2297 | /* Used to decide how to sort relocs in an optimal manner for the |
2298 | dynamic linker, before writing them out. */ | |
2299 | ||
2300 | static enum elf_reloc_type_class | |
2301 | elf_i386_reloc_type_class (rela) | |
2302 | const Elf_Internal_Rela *rela; | |
2303 | { | |
2304 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
2305 | { | |
2306 | case R_386_RELATIVE: | |
2307 | return reloc_class_relative; | |
2308 | case R_386_JUMP_SLOT: | |
2309 | return reloc_class_plt; | |
2310 | case R_386_COPY: | |
2311 | return reloc_class_copy; | |
2312 | default: | |
2313 | return reloc_class_normal; | |
2314 | } | |
2315 | } | |
2316 | ||
252b5132 RH |
2317 | /* Finish up the dynamic sections. */ |
2318 | ||
2319 | static boolean | |
2320 | elf_i386_finish_dynamic_sections (output_bfd, info) | |
2321 | bfd *output_bfd; | |
2322 | struct bfd_link_info *info; | |
2323 | { | |
6725bdbf | 2324 | struct elf_i386_link_hash_table *htab; |
252b5132 | 2325 | bfd *dynobj; |
252b5132 RH |
2326 | asection *sdyn; |
2327 | ||
6725bdbf | 2328 | htab = elf_i386_hash_table (info); |
ebe50bae | 2329 | dynobj = htab->elf.dynobj; |
252b5132 RH |
2330 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
2331 | ||
ebe50bae | 2332 | if (htab->elf.dynamic_sections_created) |
252b5132 | 2333 | { |
252b5132 RH |
2334 | Elf32_External_Dyn *dyncon, *dynconend; |
2335 | ||
ffb2e45b AM |
2336 | if (sdyn == NULL || htab->sgot == NULL) |
2337 | abort (); | |
252b5132 RH |
2338 | |
2339 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
2340 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
2341 | for (; dyncon < dynconend; dyncon++) | |
2342 | { | |
2343 | Elf_Internal_Dyn dyn; | |
51b64d56 | 2344 | asection *s; |
252b5132 RH |
2345 | |
2346 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
2347 | ||
2348 | switch (dyn.d_tag) | |
2349 | { | |
2350 | default: | |
0ac8d2ca | 2351 | continue; |
252b5132 RH |
2352 | |
2353 | case DT_PLTGOT: | |
6725bdbf | 2354 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
6725bdbf AM |
2355 | break; |
2356 | ||
252b5132 | 2357 | case DT_JMPREL: |
6725bdbf | 2358 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
252b5132 RH |
2359 | break; |
2360 | ||
2361 | case DT_PLTRELSZ: | |
51b64d56 AM |
2362 | s = htab->srelplt->output_section; |
2363 | if (s->_cooked_size != 0) | |
2364 | dyn.d_un.d_val = s->_cooked_size; | |
252b5132 | 2365 | else |
51b64d56 | 2366 | dyn.d_un.d_val = s->_raw_size; |
252b5132 RH |
2367 | break; |
2368 | ||
2369 | case DT_RELSZ: | |
2370 | /* My reading of the SVR4 ABI indicates that the | |
2371 | procedure linkage table relocs (DT_JMPREL) should be | |
2372 | included in the overall relocs (DT_REL). This is | |
2373 | what Solaris does. However, UnixWare can not handle | |
2374 | that case. Therefore, we override the DT_RELSZ entry | |
2375 | here to make it not include the JMPREL relocs. Since | |
2376 | the linker script arranges for .rel.plt to follow all | |
2377 | other relocation sections, we don't have to worry | |
2378 | about changing the DT_REL entry. */ | |
6725bdbf | 2379 | if (htab->srelplt != NULL) |
252b5132 | 2380 | { |
51b64d56 AM |
2381 | s = htab->srelplt->output_section; |
2382 | if (s->_cooked_size != 0) | |
2383 | dyn.d_un.d_val -= s->_cooked_size; | |
252b5132 | 2384 | else |
51b64d56 | 2385 | dyn.d_un.d_val -= s->_raw_size; |
252b5132 | 2386 | } |
252b5132 RH |
2387 | break; |
2388 | } | |
0ac8d2ca AM |
2389 | |
2390 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
2391 | } |
2392 | ||
2393 | /* Fill in the first entry in the procedure linkage table. */ | |
6725bdbf | 2394 | if (htab->splt && htab->splt->_raw_size > 0) |
252b5132 RH |
2395 | { |
2396 | if (info->shared) | |
6725bdbf AM |
2397 | memcpy (htab->splt->contents, |
2398 | elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE); | |
252b5132 RH |
2399 | else |
2400 | { | |
6725bdbf AM |
2401 | memcpy (htab->splt->contents, |
2402 | elf_i386_plt0_entry, PLT_ENTRY_SIZE); | |
252b5132 | 2403 | bfd_put_32 (output_bfd, |
6725bdbf AM |
2404 | (htab->sgotplt->output_section->vma |
2405 | + htab->sgotplt->output_offset | |
2406 | + 4), | |
2407 | htab->splt->contents + 2); | |
252b5132 | 2408 | bfd_put_32 (output_bfd, |
6725bdbf AM |
2409 | (htab->sgotplt->output_section->vma |
2410 | + htab->sgotplt->output_offset | |
2411 | + 8), | |
2412 | htab->splt->contents + 8); | |
252b5132 RH |
2413 | } |
2414 | ||
2415 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
2416 | really seem like the right value. */ | |
6725bdbf AM |
2417 | elf_section_data (htab->splt->output_section) |
2418 | ->this_hdr.sh_entsize = 4; | |
252b5132 RH |
2419 | } |
2420 | } | |
2421 | ||
12d0ee4a | 2422 | if (htab->sgotplt) |
252b5132 | 2423 | { |
12d0ee4a AM |
2424 | /* Fill in the first three entries in the global offset table. */ |
2425 | if (htab->sgotplt->_raw_size > 0) | |
2426 | { | |
2427 | bfd_put_32 (output_bfd, | |
2428 | (sdyn == NULL ? (bfd_vma) 0 | |
2429 | : sdyn->output_section->vma + sdyn->output_offset), | |
2430 | htab->sgotplt->contents); | |
2431 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4); | |
2432 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
2433 | } | |
252b5132 | 2434 | |
12d0ee4a AM |
2435 | elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4; |
2436 | } | |
252b5132 RH |
2437 | return true; |
2438 | } | |
2439 | ||
2440 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vec | |
2441 | #define TARGET_LITTLE_NAME "elf32-i386" | |
2442 | #define ELF_ARCH bfd_arch_i386 | |
2443 | #define ELF_MACHINE_CODE EM_386 | |
2444 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
2445 | |
2446 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 2447 | #define elf_backend_can_refcount 1 |
252b5132 RH |
2448 | #define elf_backend_want_got_plt 1 |
2449 | #define elf_backend_plt_readonly 1 | |
2450 | #define elf_backend_want_plt_sym 0 | |
2451 | #define elf_backend_got_header_size 12 | |
2452 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
2453 | ||
dd5724d5 AM |
2454 | #define elf_info_to_howto elf_i386_info_to_howto |
2455 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel | |
2456 | ||
dd5724d5 AM |
2457 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
2458 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
2459 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup | |
2460 | ||
2461 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
2462 | #define elf_backend_check_relocs elf_i386_check_relocs | |
0ac8d2ca | 2463 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
6725bdbf | 2464 | #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections |
0ac8d2ca | 2465 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
2466 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
2467 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
2468 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook | |
2469 | #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook | |
c5fccbec DJ |
2470 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
2471 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 2472 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
2473 | #define elf_backend_relocate_section elf_i386_relocate_section |
2474 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
dd5724d5 | 2475 | |
252b5132 | 2476 | #include "elf32-target.h" |