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 *)); | |
33 | static boolean elf_i386_is_local_label_name PARAMS ((bfd *, const char *)); | |
34 | static struct bfd_hash_entry *elf_i386_link_hash_newfunc | |
35 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
36 | static struct bfd_link_hash_table *elf_i386_link_hash_table_create | |
37 | PARAMS ((bfd *)); | |
38 | static boolean elf_i386_check_relocs | |
39 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
40 | const Elf_Internal_Rela *)); | |
41 | static boolean elf_i386_adjust_dynamic_symbol | |
42 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
43 | static boolean elf_i386_size_dynamic_sections | |
44 | PARAMS ((bfd *, struct bfd_link_info *)); | |
45 | static boolean elf_i386_relocate_section | |
46 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
47 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
48 | static boolean elf_i386_finish_dynamic_symbol | |
49 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, | |
50 | Elf_Internal_Sym *)); | |
51 | static boolean elf_i386_finish_dynamic_sections | |
52 | PARAMS ((bfd *, struct bfd_link_info *)); | |
53 | ||
54 | #define USE_REL 1 /* 386 uses REL relocations instead of RELA */ | |
55 | ||
56 | #include "elf/i386.h" | |
57 | ||
58 | static reloc_howto_type elf_howto_table[]= | |
59 | { | |
1b452ec6 AM |
60 | HOWTO(R_386_NONE, 0, 0, 0, false, 0, complain_overflow_bitfield, |
61 | bfd_elf_generic_reloc, "R_386_NONE", | |
62 | true, 0x00000000, 0x00000000, false), | |
63 | HOWTO(R_386_32, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
64 | bfd_elf_generic_reloc, "R_386_32", | |
65 | true, 0xffffffff, 0xffffffff, false), | |
66 | HOWTO(R_386_PC32, 0, 2, 32, true, 0, complain_overflow_bitfield, | |
67 | bfd_elf_generic_reloc, "R_386_PC32", | |
68 | true, 0xffffffff, 0xffffffff, true), | |
69 | HOWTO(R_386_GOT32, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
70 | bfd_elf_generic_reloc, "R_386_GOT32", | |
71 | true, 0xffffffff, 0xffffffff, false), | |
72 | HOWTO(R_386_PLT32, 0, 2, 32, true, 0, complain_overflow_bitfield, | |
73 | bfd_elf_generic_reloc, "R_386_PLT32", | |
74 | true, 0xffffffff, 0xffffffff, true), | |
75 | HOWTO(R_386_COPY, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
76 | bfd_elf_generic_reloc, "R_386_COPY", | |
77 | true, 0xffffffff, 0xffffffff, false), | |
78 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
79 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", | |
80 | true, 0xffffffff, 0xffffffff, false), | |
81 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
82 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", | |
83 | true, 0xffffffff, 0xffffffff, false), | |
84 | HOWTO(R_386_RELATIVE, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
85 | bfd_elf_generic_reloc, "R_386_RELATIVE", | |
86 | true, 0xffffffff, 0xffffffff, false), | |
87 | HOWTO(R_386_GOTOFF, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
88 | bfd_elf_generic_reloc, "R_386_GOTOFF", | |
89 | true, 0xffffffff, 0xffffffff, false), | |
90 | HOWTO(R_386_GOTPC, 0, 2, 32, true, 0, complain_overflow_bitfield, | |
91 | bfd_elf_generic_reloc, "R_386_GOTPC", | |
92 | true, 0xffffffff, 0xffffffff, true), | |
93 | ||
dc47f327 AM |
94 | /* We have a gap in the reloc numbers here. |
95 | R_386_standard counts the number up to this point, and | |
96 | R_386_ext_offset is the value to subtract from a reloc type of | |
97 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
1b452ec6 AM |
98 | #define R_386_standard ((unsigned int) R_386_GOTPC + 1) |
99 | #define R_386_ext_offset ((unsigned int) R_386_16 - R_386_standard) | |
100 | ||
252b5132 | 101 | /* The remaining relocs are a GNU extension. */ |
1b452ec6 AM |
102 | HOWTO(R_386_16, 0, 1, 16, false, 0, complain_overflow_bitfield, |
103 | bfd_elf_generic_reloc, "R_386_16", | |
104 | true, 0xffff, 0xffff, false), | |
105 | HOWTO(R_386_PC16, 0, 1, 16, true, 0, complain_overflow_bitfield, | |
106 | bfd_elf_generic_reloc, "R_386_PC16", | |
107 | true, 0xffff, 0xffff, true), | |
108 | HOWTO(R_386_8, 0, 0, 8, false, 0, complain_overflow_bitfield, | |
109 | bfd_elf_generic_reloc, "R_386_8", | |
110 | true, 0xff, 0xff, false), | |
111 | HOWTO(R_386_PC8, 0, 0, 8, true, 0, complain_overflow_signed, | |
112 | bfd_elf_generic_reloc, "R_386_PC8", | |
dc47f327 AM |
113 | true, 0xff, 0xff, true), |
114 | ||
115 | /* Another gap. */ | |
116 | #define R_386_ext ((unsigned int) R_386_PC8 + 1 - R_386_ext_offset) | |
117 | #define R_386_vt_offset ((unsigned int) R_386_GNU_VTINHERIT - R_386_ext) | |
252b5132 RH |
118 | |
119 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
120 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
121 | 0, /* rightshift */ | |
122 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
123 | 0, /* bitsize */ | |
124 | false, /* pc_relative */ | |
125 | 0, /* bitpos */ | |
126 | complain_overflow_dont, /* complain_on_overflow */ | |
127 | NULL, /* special_function */ | |
128 | "R_386_GNU_VTINHERIT", /* name */ | |
129 | false, /* partial_inplace */ | |
130 | 0, /* src_mask */ | |
131 | 0, /* dst_mask */ | |
dc47f327 | 132 | false), |
252b5132 RH |
133 | |
134 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
135 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
136 | 0, /* rightshift */ | |
137 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
138 | 0, /* bitsize */ | |
139 | false, /* pc_relative */ | |
140 | 0, /* bitpos */ | |
141 | complain_overflow_dont, /* complain_on_overflow */ | |
142 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
143 | "R_386_GNU_VTENTRY", /* name */ | |
144 | false, /* partial_inplace */ | |
145 | 0, /* src_mask */ | |
146 | 0, /* dst_mask */ | |
dc47f327 AM |
147 | false) |
148 | ||
149 | #define R_386_vt ((unsigned int) R_386_GNU_VTENTRY + 1 - R_386_vt_offset) | |
150 | ||
151 | }; | |
152 | ||
252b5132 RH |
153 | #ifdef DEBUG_GEN_RELOC |
154 | #define TRACE(str) fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
155 | #else | |
156 | #define TRACE(str) | |
157 | #endif | |
158 | ||
159 | static reloc_howto_type * | |
160 | elf_i386_reloc_type_lookup (abfd, code) | |
7442e600 | 161 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
162 | bfd_reloc_code_real_type code; |
163 | { | |
164 | switch (code) | |
165 | { | |
166 | case BFD_RELOC_NONE: | |
167 | TRACE ("BFD_RELOC_NONE"); | |
1b452ec6 | 168 | return &elf_howto_table[(unsigned int) R_386_NONE ]; |
252b5132 RH |
169 | |
170 | case BFD_RELOC_32: | |
171 | TRACE ("BFD_RELOC_32"); | |
1b452ec6 | 172 | return &elf_howto_table[(unsigned int) R_386_32 ]; |
252b5132 RH |
173 | |
174 | case BFD_RELOC_CTOR: | |
175 | TRACE ("BFD_RELOC_CTOR"); | |
1b452ec6 | 176 | return &elf_howto_table[(unsigned int) R_386_32 ]; |
252b5132 RH |
177 | |
178 | case BFD_RELOC_32_PCREL: | |
179 | TRACE ("BFD_RELOC_PC32"); | |
1b452ec6 | 180 | return &elf_howto_table[(unsigned int) R_386_PC32 ]; |
252b5132 RH |
181 | |
182 | case BFD_RELOC_386_GOT32: | |
183 | TRACE ("BFD_RELOC_386_GOT32"); | |
1b452ec6 | 184 | return &elf_howto_table[(unsigned int) R_386_GOT32 ]; |
252b5132 RH |
185 | |
186 | case BFD_RELOC_386_PLT32: | |
187 | TRACE ("BFD_RELOC_386_PLT32"); | |
1b452ec6 | 188 | return &elf_howto_table[(unsigned int) R_386_PLT32 ]; |
252b5132 RH |
189 | |
190 | case BFD_RELOC_386_COPY: | |
191 | TRACE ("BFD_RELOC_386_COPY"); | |
1b452ec6 | 192 | return &elf_howto_table[(unsigned int) R_386_COPY ]; |
252b5132 RH |
193 | |
194 | case BFD_RELOC_386_GLOB_DAT: | |
195 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
1b452ec6 | 196 | return &elf_howto_table[(unsigned int) R_386_GLOB_DAT ]; |
252b5132 RH |
197 | |
198 | case BFD_RELOC_386_JUMP_SLOT: | |
199 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
1b452ec6 | 200 | return &elf_howto_table[(unsigned int) R_386_JUMP_SLOT ]; |
252b5132 RH |
201 | |
202 | case BFD_RELOC_386_RELATIVE: | |
203 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
1b452ec6 | 204 | return &elf_howto_table[(unsigned int) R_386_RELATIVE ]; |
252b5132 RH |
205 | |
206 | case BFD_RELOC_386_GOTOFF: | |
207 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
1b452ec6 | 208 | return &elf_howto_table[(unsigned int) R_386_GOTOFF ]; |
252b5132 RH |
209 | |
210 | case BFD_RELOC_386_GOTPC: | |
211 | TRACE ("BFD_RELOC_386_GOTPC"); | |
1b452ec6 | 212 | return &elf_howto_table[(unsigned int) R_386_GOTPC ]; |
252b5132 RH |
213 | |
214 | /* The remaining relocs are a GNU extension. */ | |
215 | case BFD_RELOC_16: | |
216 | TRACE ("BFD_RELOC_16"); | |
1b452ec6 | 217 | return &elf_howto_table[(unsigned int) R_386_16 - R_386_ext_offset]; |
252b5132 RH |
218 | |
219 | case BFD_RELOC_16_PCREL: | |
220 | TRACE ("BFD_RELOC_16_PCREL"); | |
1b452ec6 | 221 | return &elf_howto_table[(unsigned int) R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
222 | |
223 | case BFD_RELOC_8: | |
224 | TRACE ("BFD_RELOC_8"); | |
1b452ec6 | 225 | return &elf_howto_table[(unsigned int) R_386_8 - R_386_ext_offset]; |
252b5132 RH |
226 | |
227 | case BFD_RELOC_8_PCREL: | |
228 | TRACE ("BFD_RELOC_8_PCREL"); | |
1b452ec6 | 229 | return &elf_howto_table[(unsigned int) R_386_PC8 - R_386_ext_offset]; |
252b5132 RH |
230 | |
231 | case BFD_RELOC_VTABLE_INHERIT: | |
232 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
dc47f327 AM |
233 | return &elf_howto_table[(unsigned int) R_386_GNU_VTINHERIT |
234 | - R_386_vt_offset]; | |
252b5132 RH |
235 | |
236 | case BFD_RELOC_VTABLE_ENTRY: | |
237 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
dc47f327 AM |
238 | return &elf_howto_table[(unsigned int) R_386_GNU_VTENTRY |
239 | - R_386_vt_offset]; | |
252b5132 RH |
240 | |
241 | default: | |
242 | break; | |
243 | } | |
244 | ||
245 | TRACE ("Unknown"); | |
246 | return 0; | |
247 | } | |
248 | ||
249 | static void | |
250 | elf_i386_info_to_howto (abfd, cache_ptr, dst) | |
7442e600 ILT |
251 | bfd *abfd ATTRIBUTE_UNUSED; |
252 | arelent *cache_ptr ATTRIBUTE_UNUSED; | |
253 | Elf32_Internal_Rela *dst ATTRIBUTE_UNUSED; | |
252b5132 RH |
254 | { |
255 | abort (); | |
256 | } | |
257 | ||
258 | static void | |
259 | elf_i386_info_to_howto_rel (abfd, cache_ptr, dst) | |
7442e600 | 260 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
261 | arelent *cache_ptr; |
262 | Elf32_Internal_Rel *dst; | |
263 | { | |
dc47f327 AM |
264 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); |
265 | unsigned int indx; | |
266 | ||
267 | if ((indx = r_type) >= R_386_standard | |
268 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
269 | >= R_386_ext - R_386_standard) | |
270 | && ((indx = r_type - R_386_vt_offset) - R_386_ext | |
271 | >= R_386_vt - R_386_ext)) | |
252b5132 | 272 | { |
dc47f327 AM |
273 | (*_bfd_error_handler) (_("%s: invalid relocation type %d"), |
274 | bfd_get_filename (abfd), (int) r_type); | |
275 | indx = (unsigned int) R_386_NONE; | |
252b5132 | 276 | } |
dc47f327 | 277 | cache_ptr->howto = &elf_howto_table[indx]; |
252b5132 RH |
278 | } |
279 | ||
280 | /* Return whether a symbol name implies a local label. The UnixWare | |
281 | 2.1 cc generates temporary symbols that start with .X, so we | |
282 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
283 | If so, we should move the .X recognition into | |
284 | _bfd_elf_is_local_label_name. */ | |
285 | ||
286 | static boolean | |
287 | elf_i386_is_local_label_name (abfd, name) | |
288 | bfd *abfd; | |
289 | const char *name; | |
290 | { | |
291 | if (name[0] == '.' && name[1] == 'X') | |
292 | return true; | |
293 | ||
294 | return _bfd_elf_is_local_label_name (abfd, name); | |
295 | } | |
296 | \f | |
297 | /* Functions for the i386 ELF linker. */ | |
298 | ||
299 | /* The name of the dynamic interpreter. This is put in the .interp | |
300 | section. */ | |
301 | ||
302 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
303 | ||
304 | /* The size in bytes of an entry in the procedure linkage table. */ | |
305 | ||
306 | #define PLT_ENTRY_SIZE 16 | |
307 | ||
308 | /* The first entry in an absolute procedure linkage table looks like | |
309 | this. See the SVR4 ABI i386 supplement to see how this works. */ | |
310 | ||
311 | static const bfd_byte elf_i386_plt0_entry[PLT_ENTRY_SIZE] = | |
312 | { | |
313 | 0xff, 0x35, /* pushl contents of address */ | |
314 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
315 | 0xff, 0x25, /* jmp indirect */ | |
316 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
317 | 0, 0, 0, 0 /* pad out to 16 bytes. */ | |
318 | }; | |
319 | ||
320 | /* Subsequent entries in an absolute procedure linkage table look like | |
321 | this. */ | |
322 | ||
323 | static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] = | |
324 | { | |
325 | 0xff, 0x25, /* jmp indirect */ | |
326 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
327 | 0x68, /* pushl immediate */ | |
328 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
329 | 0xe9, /* jmp relative */ | |
330 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
331 | }; | |
332 | ||
333 | /* The first entry in a PIC procedure linkage table look like this. */ | |
334 | ||
335 | static const bfd_byte elf_i386_pic_plt0_entry[PLT_ENTRY_SIZE] = | |
336 | { | |
337 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
338 | 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */ | |
339 | 0, 0, 0, 0 /* pad out to 16 bytes. */ | |
340 | }; | |
341 | ||
342 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
343 | ||
344 | static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] = | |
345 | { | |
346 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
347 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
348 | 0x68, /* pushl immediate */ | |
349 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
350 | 0xe9, /* jmp relative */ | |
351 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
352 | }; | |
353 | ||
354 | /* The i386 linker needs to keep track of the number of relocs that it | |
355 | decides to copy in check_relocs for each symbol. This is so that | |
356 | it can discard PC relative relocs if it doesn't need them when | |
357 | linking with -Bsymbolic. We store the information in a field | |
358 | extending the regular ELF linker hash table. */ | |
359 | ||
360 | /* This structure keeps track of the number of PC relative relocs we | |
361 | have copied for a given symbol. */ | |
362 | ||
363 | struct elf_i386_pcrel_relocs_copied | |
364 | { | |
365 | /* Next section. */ | |
366 | struct elf_i386_pcrel_relocs_copied *next; | |
367 | /* A section in dynobj. */ | |
368 | asection *section; | |
369 | /* Number of relocs copied in this section. */ | |
370 | bfd_size_type count; | |
371 | }; | |
372 | ||
373 | /* i386 ELF linker hash entry. */ | |
374 | ||
375 | struct elf_i386_link_hash_entry | |
376 | { | |
377 | struct elf_link_hash_entry root; | |
378 | ||
379 | /* Number of PC relative relocs copied for this symbol. */ | |
380 | struct elf_i386_pcrel_relocs_copied *pcrel_relocs_copied; | |
381 | }; | |
382 | ||
383 | /* i386 ELF linker hash table. */ | |
384 | ||
385 | struct elf_i386_link_hash_table | |
386 | { | |
387 | struct elf_link_hash_table root; | |
388 | }; | |
389 | ||
390 | /* Declare this now that the above structures are defined. */ | |
391 | ||
392 | static boolean elf_i386_discard_copies | |
393 | PARAMS ((struct elf_i386_link_hash_entry *, PTR)); | |
394 | ||
395 | /* Traverse an i386 ELF linker hash table. */ | |
396 | ||
397 | #define elf_i386_link_hash_traverse(table, func, info) \ | |
398 | (elf_link_hash_traverse \ | |
399 | (&(table)->root, \ | |
400 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
401 | (info))) | |
402 | ||
403 | /* Get the i386 ELF linker hash table from a link_info structure. */ | |
404 | ||
405 | #define elf_i386_hash_table(p) \ | |
406 | ((struct elf_i386_link_hash_table *) ((p)->hash)) | |
407 | ||
408 | /* Create an entry in an i386 ELF linker hash table. */ | |
409 | ||
410 | static struct bfd_hash_entry * | |
411 | elf_i386_link_hash_newfunc (entry, table, string) | |
412 | struct bfd_hash_entry *entry; | |
413 | struct bfd_hash_table *table; | |
414 | const char *string; | |
415 | { | |
416 | struct elf_i386_link_hash_entry *ret = | |
417 | (struct elf_i386_link_hash_entry *) entry; | |
418 | ||
419 | /* Allocate the structure if it has not already been allocated by a | |
420 | subclass. */ | |
421 | if (ret == (struct elf_i386_link_hash_entry *) NULL) | |
422 | ret = ((struct elf_i386_link_hash_entry *) | |
423 | bfd_hash_allocate (table, | |
424 | sizeof (struct elf_i386_link_hash_entry))); | |
425 | if (ret == (struct elf_i386_link_hash_entry *) NULL) | |
426 | return (struct bfd_hash_entry *) ret; | |
427 | ||
428 | /* Call the allocation method of the superclass. */ | |
429 | ret = ((struct elf_i386_link_hash_entry *) | |
430 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
431 | table, string)); | |
432 | if (ret != (struct elf_i386_link_hash_entry *) NULL) | |
433 | { | |
434 | ret->pcrel_relocs_copied = NULL; | |
435 | } | |
436 | ||
437 | return (struct bfd_hash_entry *) ret; | |
438 | } | |
439 | ||
440 | /* Create an i386 ELF linker hash table. */ | |
441 | ||
442 | static struct bfd_link_hash_table * | |
443 | elf_i386_link_hash_table_create (abfd) | |
444 | bfd *abfd; | |
445 | { | |
446 | struct elf_i386_link_hash_table *ret; | |
447 | ||
448 | ret = ((struct elf_i386_link_hash_table *) | |
449 | bfd_alloc (abfd, sizeof (struct elf_i386_link_hash_table))); | |
450 | if (ret == (struct elf_i386_link_hash_table *) NULL) | |
451 | return NULL; | |
452 | ||
453 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
454 | elf_i386_link_hash_newfunc)) | |
455 | { | |
456 | bfd_release (abfd, ret); | |
457 | return NULL; | |
458 | } | |
459 | ||
460 | return &ret->root.root; | |
461 | } | |
462 | ||
463 | /* Look through the relocs for a section during the first phase, and | |
464 | allocate space in the global offset table or procedure linkage | |
465 | table. */ | |
466 | ||
467 | static boolean | |
468 | elf_i386_check_relocs (abfd, info, sec, relocs) | |
469 | bfd *abfd; | |
470 | struct bfd_link_info *info; | |
471 | asection *sec; | |
472 | const Elf_Internal_Rela *relocs; | |
473 | { | |
474 | bfd *dynobj; | |
475 | Elf_Internal_Shdr *symtab_hdr; | |
476 | struct elf_link_hash_entry **sym_hashes; | |
dd5724d5 | 477 | bfd_signed_vma *local_got_refcounts; |
252b5132 RH |
478 | const Elf_Internal_Rela *rel; |
479 | const Elf_Internal_Rela *rel_end; | |
480 | asection *sgot; | |
481 | asection *srelgot; | |
482 | asection *sreloc; | |
483 | ||
484 | if (info->relocateable) | |
485 | return true; | |
486 | ||
487 | dynobj = elf_hash_table (info)->dynobj; | |
488 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
489 | sym_hashes = elf_sym_hashes (abfd); | |
dd5724d5 | 490 | local_got_refcounts = elf_local_got_refcounts (abfd); |
252b5132 RH |
491 | |
492 | sgot = NULL; | |
493 | srelgot = NULL; | |
494 | sreloc = NULL; | |
495 | ||
496 | rel_end = relocs + sec->reloc_count; | |
497 | for (rel = relocs; rel < rel_end; rel++) | |
498 | { | |
499 | unsigned long r_symndx; | |
500 | struct elf_link_hash_entry *h; | |
501 | ||
502 | r_symndx = ELF32_R_SYM (rel->r_info); | |
503 | ||
f5f31454 L |
504 | if (r_symndx >= symtab_hdr->sh_size / symtab_hdr->sh_entsize) |
505 | { | |
506 | if (abfd->my_archive) | |
507 | (*_bfd_error_handler) (_("%s(%s): bad symbol index: %d"), | |
508 | bfd_get_filename (abfd->my_archive), | |
509 | bfd_get_filename (abfd), | |
510 | r_symndx); | |
511 | else | |
512 | (*_bfd_error_handler) (_("%s: bad symbol index: %d"), | |
513 | bfd_get_filename (abfd), | |
514 | r_symndx); | |
515 | return false; | |
516 | } | |
517 | ||
252b5132 RH |
518 | if (r_symndx < symtab_hdr->sh_info) |
519 | h = NULL; | |
520 | else | |
521 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
522 | ||
523 | /* Some relocs require a global offset table. */ | |
524 | if (dynobj == NULL) | |
525 | { | |
526 | switch (ELF32_R_TYPE (rel->r_info)) | |
527 | { | |
528 | case R_386_GOT32: | |
529 | case R_386_GOTOFF: | |
530 | case R_386_GOTPC: | |
531 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
532 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
533 | return false; | |
534 | break; | |
535 | ||
536 | default: | |
537 | break; | |
538 | } | |
539 | } | |
540 | ||
541 | switch (ELF32_R_TYPE (rel->r_info)) | |
542 | { | |
543 | case R_386_GOT32: | |
544 | /* This symbol requires a global offset table entry. */ | |
545 | ||
546 | if (sgot == NULL) | |
547 | { | |
548 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
549 | BFD_ASSERT (sgot != NULL); | |
550 | } | |
551 | ||
552 | if (srelgot == NULL | |
553 | && (h != NULL || info->shared)) | |
554 | { | |
555 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); | |
556 | if (srelgot == NULL) | |
557 | { | |
558 | srelgot = bfd_make_section (dynobj, ".rel.got"); | |
559 | if (srelgot == NULL | |
560 | || ! bfd_set_section_flags (dynobj, srelgot, | |
561 | (SEC_ALLOC | |
562 | | SEC_LOAD | |
563 | | SEC_HAS_CONTENTS | |
564 | | SEC_IN_MEMORY | |
565 | | SEC_LINKER_CREATED | |
566 | | SEC_READONLY)) | |
567 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) | |
568 | return false; | |
569 | } | |
570 | } | |
571 | ||
572 | if (h != NULL) | |
573 | { | |
dd5724d5 | 574 | if (h->got.refcount == -1) |
252b5132 | 575 | { |
dd5724d5 | 576 | h->got.refcount = 1; |
252b5132 | 577 | |
dd5724d5 AM |
578 | /* Make sure this symbol is output as a dynamic symbol. */ |
579 | if (h->dynindx == -1) | |
580 | { | |
581 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
582 | return false; | |
583 | } | |
252b5132 | 584 | |
dd5724d5 AM |
585 | sgot->_raw_size += 4; |
586 | srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
587 | } | |
588 | else | |
589 | h->got.refcount += 1; | |
252b5132 RH |
590 | } |
591 | else | |
592 | { | |
dd5724d5 AM |
593 | /* This is a global offset table entry for a local symbol. */ |
594 | if (local_got_refcounts == NULL) | |
252b5132 RH |
595 | { |
596 | size_t size; | |
252b5132 | 597 | |
dd5724d5 AM |
598 | size = symtab_hdr->sh_info * sizeof (bfd_signed_vma); |
599 | local_got_refcounts = ((bfd_signed_vma *) | |
600 | bfd_alloc (abfd, size)); | |
601 | if (local_got_refcounts == NULL) | |
252b5132 | 602 | return false; |
dd5724d5 AM |
603 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
604 | memset (local_got_refcounts, -1, size); | |
252b5132 | 605 | } |
dd5724d5 | 606 | if (local_got_refcounts[r_symndx] == -1) |
252b5132 | 607 | { |
dd5724d5 | 608 | local_got_refcounts[r_symndx] = 1; |
252b5132 | 609 | |
dd5724d5 AM |
610 | sgot->_raw_size += 4; |
611 | if (info->shared) | |
612 | { | |
613 | /* If we are generating a shared object, we need to | |
614 | output a R_386_RELATIVE reloc so that the dynamic | |
615 | linker can adjust this GOT entry. */ | |
616 | srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
617 | } | |
252b5132 | 618 | } |
dd5724d5 AM |
619 | else |
620 | local_got_refcounts[r_symndx] += 1; | |
252b5132 | 621 | } |
252b5132 RH |
622 | break; |
623 | ||
624 | case R_386_PLT32: | |
625 | /* This symbol requires a procedure linkage table entry. We | |
626 | actually build the entry in adjust_dynamic_symbol, | |
627 | because this might be a case of linking PIC code which is | |
628 | never referenced by a dynamic object, in which case we | |
629 | don't need to generate a procedure linkage table entry | |
630 | after all. */ | |
631 | ||
632 | /* If this is a local symbol, we resolve it directly without | |
633 | creating a procedure linkage table entry. */ | |
634 | if (h == NULL) | |
635 | continue; | |
636 | ||
dd5724d5 AM |
637 | if (h->plt.refcount == -1) |
638 | { | |
639 | h->plt.refcount = 1; | |
640 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
641 | } | |
642 | else | |
643 | h->plt.refcount += 1; | |
252b5132 RH |
644 | break; |
645 | ||
646 | case R_386_32: | |
647 | case R_386_PC32: | |
7843f00e ILT |
648 | if (h != NULL) |
649 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
650 | ||
252b5132 | 651 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
652 | against a global symbol, or a non PC relative reloc |
653 | against a local symbol, then we need to copy the reloc | |
654 | into the shared library. However, if we are linking with | |
655 | -Bsymbolic, we do not need to copy a reloc against a | |
656 | global symbol which is defined in an object we are | |
657 | including in the link (i.e., DEF_REGULAR is set). At | |
658 | this point we have not seen all the input files, so it is | |
659 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
660 | later (it is never cleared). In case of a weak definition, |
661 | DEF_REGULAR may be cleared later by a strong definition in | |
662 | a shared library. We account for that possibility below by | |
663 | storing information in the relocs_copied field of the hash | |
664 | table entry. A similar situation occurs when creating | |
665 | shared libraries and symbol visibility changes render the | |
666 | symbol local. */ | |
252b5132 RH |
667 | if (info->shared |
668 | && (sec->flags & SEC_ALLOC) != 0 | |
669 | && (ELF32_R_TYPE (rel->r_info) != R_386_PC32 | |
670 | || (h != NULL | |
671 | && (! info->symbolic | |
1f655a09 | 672 | || h->root.type == bfd_link_hash_defweak |
252b5132 RH |
673 | || (h->elf_link_hash_flags |
674 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
675 | { | |
676 | /* When creating a shared object, we must copy these | |
f69da49f AM |
677 | reloc types into the output file. We create a reloc |
678 | section in dynobj and make room for this reloc. */ | |
252b5132 RH |
679 | if (sreloc == NULL) |
680 | { | |
681 | const char *name; | |
682 | ||
683 | name = (bfd_elf_string_from_elf_section | |
684 | (abfd, | |
685 | elf_elfheader (abfd)->e_shstrndx, | |
686 | elf_section_data (sec)->rel_hdr.sh_name)); | |
687 | if (name == NULL) | |
688 | return false; | |
689 | ||
c8492176 L |
690 | if (strncmp (name, ".rel", 4) != 0 |
691 | || strcmp (bfd_get_section_name (abfd, sec), | |
692 | name + 4) != 0) | |
693 | { | |
694 | if (abfd->my_archive) | |
695 | (*_bfd_error_handler) (_("%s(%s): bad relocation section name `%s\'"), | |
696 | bfd_get_filename (abfd->my_archive), | |
697 | bfd_get_filename (abfd), | |
698 | name); | |
699 | else | |
700 | (*_bfd_error_handler) (_("%s: bad relocation section name `%s\'"), | |
701 | bfd_get_filename (abfd), | |
702 | name); | |
f5f31454 | 703 | } |
252b5132 RH |
704 | |
705 | sreloc = bfd_get_section_by_name (dynobj, name); | |
706 | if (sreloc == NULL) | |
707 | { | |
708 | flagword flags; | |
709 | ||
710 | sreloc = bfd_make_section (dynobj, name); | |
711 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
712 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
713 | if ((sec->flags & SEC_ALLOC) != 0) | |
714 | flags |= SEC_ALLOC | SEC_LOAD; | |
715 | if (sreloc == NULL | |
716 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
717 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
718 | return false; | |
719 | } | |
720 | } | |
721 | ||
722 | sreloc->_raw_size += sizeof (Elf32_External_Rel); | |
723 | ||
f69da49f AM |
724 | /* If this is a global symbol, we count the number of PC |
725 | relative relocations we have entered for this symbol, | |
726 | so that we can discard them later as necessary. Note | |
727 | that this function is only called if we are using an | |
728 | elf_i386 linker hash table, which means that h is | |
729 | really a pointer to an elf_i386_link_hash_entry. */ | |
730 | if (h != NULL | |
252b5132 RH |
731 | && ELF32_R_TYPE (rel->r_info) == R_386_PC32) |
732 | { | |
733 | struct elf_i386_link_hash_entry *eh; | |
734 | struct elf_i386_pcrel_relocs_copied *p; | |
735 | ||
736 | eh = (struct elf_i386_link_hash_entry *) h; | |
737 | ||
738 | for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) | |
739 | if (p->section == sreloc) | |
740 | break; | |
741 | ||
742 | if (p == NULL) | |
743 | { | |
744 | p = ((struct elf_i386_pcrel_relocs_copied *) | |
745 | bfd_alloc (dynobj, sizeof *p)); | |
746 | if (p == NULL) | |
747 | return false; | |
748 | p->next = eh->pcrel_relocs_copied; | |
749 | eh->pcrel_relocs_copied = p; | |
750 | p->section = sreloc; | |
751 | p->count = 0; | |
752 | } | |
753 | ||
754 | ++p->count; | |
755 | } | |
756 | } | |
757 | ||
758 | break; | |
759 | ||
760 | /* This relocation describes the C++ object vtable hierarchy. | |
761 | Reconstruct it for later use during GC. */ | |
762 | case R_386_GNU_VTINHERIT: | |
763 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
764 | return false; | |
765 | break; | |
766 | ||
767 | /* This relocation describes which C++ vtable entries are actually | |
768 | used. Record for later use during GC. */ | |
769 | case R_386_GNU_VTENTRY: | |
770 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
771 | return false; | |
772 | break; | |
773 | ||
774 | default: | |
775 | break; | |
776 | } | |
777 | } | |
778 | ||
779 | return true; | |
780 | } | |
781 | ||
782 | /* Return the section that should be marked against GC for a given | |
783 | relocation. */ | |
784 | ||
785 | static asection * | |
786 | elf_i386_gc_mark_hook (abfd, info, rel, h, sym) | |
787 | bfd *abfd; | |
7442e600 | 788 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
789 | Elf_Internal_Rela *rel; |
790 | struct elf_link_hash_entry *h; | |
791 | Elf_Internal_Sym *sym; | |
792 | { | |
793 | if (h != NULL) | |
794 | { | |
795 | switch (ELF32_R_TYPE (rel->r_info)) | |
796 | { | |
797 | case R_386_GNU_VTINHERIT: | |
798 | case R_386_GNU_VTENTRY: | |
799 | break; | |
800 | ||
801 | default: | |
802 | switch (h->root.type) | |
803 | { | |
804 | case bfd_link_hash_defined: | |
805 | case bfd_link_hash_defweak: | |
806 | return h->root.u.def.section; | |
807 | ||
808 | case bfd_link_hash_common: | |
809 | return h->root.u.c.p->section; | |
810 | ||
811 | default: | |
812 | break; | |
813 | } | |
814 | } | |
815 | } | |
816 | else | |
817 | { | |
818 | if (!(elf_bad_symtab (abfd) | |
819 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
820 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
821 | && sym->st_shndx != SHN_COMMON)) | |
822 | { | |
823 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
824 | } | |
825 | } | |
826 | ||
827 | return NULL; | |
828 | } | |
829 | ||
830 | /* Update the got entry reference counts for the section being removed. */ | |
831 | ||
832 | static boolean | |
833 | elf_i386_gc_sweep_hook (abfd, info, sec, relocs) | |
dd5724d5 | 834 | bfd *abfd; |
7442e600 | 835 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
dd5724d5 AM |
836 | asection *sec; |
837 | const Elf_Internal_Rela *relocs; | |
252b5132 | 838 | { |
dd5724d5 AM |
839 | Elf_Internal_Shdr *symtab_hdr; |
840 | struct elf_link_hash_entry **sym_hashes; | |
841 | bfd_signed_vma *local_got_refcounts; | |
842 | const Elf_Internal_Rela *rel, *relend; | |
843 | unsigned long r_symndx; | |
844 | struct elf_link_hash_entry *h; | |
845 | bfd *dynobj; | |
846 | asection *sgot; | |
847 | asection *srelgot; | |
848 | ||
849 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
850 | sym_hashes = elf_sym_hashes (abfd); | |
851 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
852 | ||
853 | dynobj = elf_hash_table (info)->dynobj; | |
854 | if (dynobj == NULL) | |
855 | return true; | |
856 | ||
857 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
858 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); | |
859 | ||
860 | relend = relocs + sec->reloc_count; | |
861 | for (rel = relocs; rel < relend; rel++) | |
862 | switch (ELF32_R_TYPE (rel->r_info)) | |
863 | { | |
864 | case R_386_GOT32: | |
865 | case R_386_GOTOFF: | |
866 | case R_386_GOTPC: | |
867 | r_symndx = ELF32_R_SYM (rel->r_info); | |
868 | if (r_symndx >= symtab_hdr->sh_info) | |
869 | { | |
870 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
871 | if (h->got.refcount > 0) | |
872 | { | |
873 | h->got.refcount -= 1; | |
874 | if (h->got.refcount == 0) | |
875 | { | |
876 | sgot->_raw_size -= 4; | |
877 | srelgot->_raw_size -= sizeof (Elf32_External_Rel); | |
878 | } | |
879 | } | |
880 | } | |
881 | else if (local_got_refcounts != NULL) | |
882 | { | |
883 | if (local_got_refcounts[r_symndx] > 0) | |
884 | { | |
885 | local_got_refcounts[r_symndx] -= 1; | |
886 | if (local_got_refcounts[r_symndx] == 0) | |
887 | { | |
888 | sgot->_raw_size -= 4; | |
889 | if (info->shared) | |
890 | srelgot->_raw_size -= sizeof (Elf32_External_Rel); | |
891 | } | |
892 | } | |
893 | } | |
894 | break; | |
895 | ||
896 | case R_386_PLT32: | |
897 | r_symndx = ELF32_R_SYM (rel->r_info); | |
898 | if (r_symndx >= symtab_hdr->sh_info) | |
899 | { | |
900 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
901 | if (h->plt.refcount > 0) | |
902 | h->plt.refcount -= 1; | |
903 | } | |
904 | break; | |
905 | ||
906 | default: | |
907 | break; | |
908 | } | |
252b5132 RH |
909 | |
910 | return true; | |
911 | } | |
912 | ||
913 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
914 | regular object. The current definition is in some section of the | |
915 | dynamic object, but we're not including those sections. We have to | |
916 | change the definition to something the rest of the link can | |
917 | understand. */ | |
918 | ||
919 | static boolean | |
920 | elf_i386_adjust_dynamic_symbol (info, h) | |
921 | struct bfd_link_info *info; | |
922 | struct elf_link_hash_entry *h; | |
923 | { | |
924 | bfd *dynobj; | |
925 | asection *s; | |
926 | unsigned int power_of_two; | |
927 | ||
928 | dynobj = elf_hash_table (info)->dynobj; | |
929 | ||
930 | /* Make sure we know what is going on here. */ | |
931 | BFD_ASSERT (dynobj != NULL | |
932 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
933 | || h->weakdef != NULL | |
934 | || ((h->elf_link_hash_flags | |
935 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
936 | && (h->elf_link_hash_flags | |
937 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
938 | && (h->elf_link_hash_flags | |
939 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
940 | ||
941 | /* If this is a function, put it in the procedure linkage table. We | |
942 | will fill in the contents of the procedure linkage table later, | |
943 | when we know the address of the .got section. */ | |
944 | if (h->type == STT_FUNC | |
945 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
946 | { | |
dd5724d5 AM |
947 | if ((! info->shared |
948 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
949 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0) | |
950 | || (info->shared && h->plt.refcount <= 0)) | |
252b5132 RH |
951 | { |
952 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
953 | file, but the symbol was never referred to by a dynamic |
954 | object, or if all references were garbage collected. In | |
955 | such a case, we don't actually need to build a procedure | |
956 | linkage table, and we can just do a PC32 reloc instead. */ | |
957 | h->plt.offset = (bfd_vma) -1; | |
958 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
252b5132 RH |
959 | return true; |
960 | } | |
961 | ||
962 | /* Make sure this symbol is output as a dynamic symbol. */ | |
963 | if (h->dynindx == -1) | |
964 | { | |
965 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
966 | return false; | |
967 | } | |
968 | ||
969 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
970 | BFD_ASSERT (s != NULL); | |
971 | ||
972 | /* If this is the first .plt entry, make room for the special | |
973 | first entry. */ | |
974 | if (s->_raw_size == 0) | |
975 | s->_raw_size += PLT_ENTRY_SIZE; | |
976 | ||
977 | /* If this symbol is not defined in a regular file, and we are | |
978 | not generating a shared library, then set the symbol to this | |
979 | location in the .plt. This is required to make function | |
980 | pointers compare as equal between the normal executable and | |
981 | the shared library. */ | |
982 | if (! info->shared | |
983 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
984 | { | |
985 | h->root.u.def.section = s; | |
986 | h->root.u.def.value = s->_raw_size; | |
987 | } | |
988 | ||
989 | h->plt.offset = s->_raw_size; | |
990 | ||
991 | /* Make room for this entry. */ | |
992 | s->_raw_size += PLT_ENTRY_SIZE; | |
993 | ||
994 | /* We also need to make an entry in the .got.plt section, which | |
995 | will be placed in the .got section by the linker script. */ | |
252b5132 RH |
996 | s = bfd_get_section_by_name (dynobj, ".got.plt"); |
997 | BFD_ASSERT (s != NULL); | |
998 | s->_raw_size += 4; | |
999 | ||
1000 | /* We also need to make an entry in the .rel.plt section. */ | |
252b5132 RH |
1001 | s = bfd_get_section_by_name (dynobj, ".rel.plt"); |
1002 | BFD_ASSERT (s != NULL); | |
1003 | s->_raw_size += sizeof (Elf32_External_Rel); | |
1004 | ||
1005 | return true; | |
1006 | } | |
1007 | ||
1008 | /* If this is a weak symbol, and there is a real definition, the | |
1009 | processor independent code will have arranged for us to see the | |
1010 | real definition first, and we can just use the same value. */ | |
1011 | if (h->weakdef != NULL) | |
1012 | { | |
1013 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1014 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1015 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1016 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
1017 | return true; | |
1018 | } | |
1019 | ||
1020 | /* This is a reference to a symbol defined by a dynamic object which | |
1021 | is not a function. */ | |
1022 | ||
1023 | /* If we are creating a shared library, we must presume that the | |
1024 | only references to the symbol are via the global offset table. | |
1025 | For such cases we need not do anything here; the relocations will | |
1026 | be handled correctly by relocate_section. */ | |
1027 | if (info->shared) | |
1028 | return true; | |
1029 | ||
7843f00e ILT |
1030 | /* If there are no references to this symbol that do not use the |
1031 | GOT, we don't need to generate a copy reloc. */ | |
1032 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
1033 | return true; | |
1034 | ||
252b5132 RH |
1035 | /* We must allocate the symbol in our .dynbss section, which will |
1036 | become part of the .bss section of the executable. There will be | |
1037 | an entry for this symbol in the .dynsym section. The dynamic | |
1038 | object will contain position independent code, so all references | |
1039 | from the dynamic object to this symbol will go through the global | |
1040 | offset table. The dynamic linker will use the .dynsym entry to | |
1041 | determine the address it must put in the global offset table, so | |
1042 | both the dynamic object and the regular object will refer to the | |
1043 | same memory location for the variable. */ | |
1044 | ||
1045 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
1046 | BFD_ASSERT (s != NULL); | |
1047 | ||
1048 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to | |
1049 | copy the initial value out of the dynamic object and into the | |
1050 | runtime process image. We need to remember the offset into the | |
1051 | .rel.bss section we are going to use. */ | |
1052 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
1053 | { | |
1054 | asection *srel; | |
1055 | ||
1056 | srel = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
1057 | BFD_ASSERT (srel != NULL); | |
1058 | srel->_raw_size += sizeof (Elf32_External_Rel); | |
1059 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
1060 | } | |
1061 | ||
1062 | /* We need to figure out the alignment required for this symbol. I | |
1063 | have no idea how ELF linkers handle this. */ | |
1064 | power_of_two = bfd_log2 (h->size); | |
1065 | if (power_of_two > 3) | |
1066 | power_of_two = 3; | |
1067 | ||
1068 | /* Apply the required alignment. */ | |
1069 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
1070 | (bfd_size_type) (1 << power_of_two)); | |
1071 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
1072 | { | |
1073 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
1074 | return false; | |
1075 | } | |
1076 | ||
1077 | /* Define the symbol as being at this point in the section. */ | |
1078 | h->root.u.def.section = s; | |
1079 | h->root.u.def.value = s->_raw_size; | |
1080 | ||
1081 | /* Increment the section size to make room for the symbol. */ | |
1082 | s->_raw_size += h->size; | |
1083 | ||
1084 | return true; | |
1085 | } | |
1086 | ||
1087 | /* Set the sizes of the dynamic sections. */ | |
1088 | ||
1089 | static boolean | |
1090 | elf_i386_size_dynamic_sections (output_bfd, info) | |
1091 | bfd *output_bfd; | |
1092 | struct bfd_link_info *info; | |
1093 | { | |
1094 | bfd *dynobj; | |
1095 | asection *s; | |
1096 | boolean plt; | |
1097 | boolean relocs; | |
1098 | boolean reltext; | |
1099 | ||
1100 | dynobj = elf_hash_table (info)->dynobj; | |
1101 | BFD_ASSERT (dynobj != NULL); | |
1102 | ||
1103 | if (elf_hash_table (info)->dynamic_sections_created) | |
1104 | { | |
1105 | /* Set the contents of the .interp section to the interpreter. */ | |
1106 | if (! info->shared) | |
1107 | { | |
1108 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1109 | BFD_ASSERT (s != NULL); | |
1110 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
1111 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1112 | } | |
1113 | } | |
1114 | else | |
1115 | { | |
1116 | /* We may have created entries in the .rel.got section. | |
1117 | However, if we are not creating the dynamic sections, we will | |
1118 | not actually use these entries. Reset the size of .rel.got, | |
1119 | which will cause it to get stripped from the output file | |
1120 | below. */ | |
1121 | s = bfd_get_section_by_name (dynobj, ".rel.got"); | |
1122 | if (s != NULL) | |
1123 | s->_raw_size = 0; | |
1124 | } | |
1125 | ||
1126 | /* If this is a -Bsymbolic shared link, then we need to discard all | |
1127 | PC relative relocs against symbols defined in a regular object. | |
1128 | We allocated space for them in the check_relocs routine, but we | |
1129 | will not fill them in in the relocate_section routine. */ | |
f69da49f | 1130 | if (info->shared) |
252b5132 RH |
1131 | elf_i386_link_hash_traverse (elf_i386_hash_table (info), |
1132 | elf_i386_discard_copies, | |
f69da49f | 1133 | (PTR) info); |
252b5132 RH |
1134 | |
1135 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
1136 | determined the sizes of the various dynamic sections. Allocate | |
1137 | memory for them. */ | |
1138 | plt = false; | |
1139 | relocs = false; | |
1140 | reltext = false; | |
1141 | for (s = dynobj->sections; s != NULL; s = s->next) | |
1142 | { | |
1143 | const char *name; | |
1144 | boolean strip; | |
1145 | ||
1146 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1147 | continue; | |
1148 | ||
1149 | /* It's OK to base decisions on the section name, because none | |
1150 | of the dynobj section names depend upon the input files. */ | |
1151 | name = bfd_get_section_name (dynobj, s); | |
1152 | ||
1153 | strip = false; | |
1154 | ||
1155 | if (strcmp (name, ".plt") == 0) | |
1156 | { | |
1157 | if (s->_raw_size == 0) | |
1158 | { | |
1159 | /* Strip this section if we don't need it; see the | |
1160 | comment below. */ | |
1161 | strip = true; | |
1162 | } | |
1163 | else | |
1164 | { | |
1165 | /* Remember whether there is a PLT. */ | |
1166 | plt = true; | |
1167 | } | |
1168 | } | |
1169 | else if (strncmp (name, ".rel", 4) == 0) | |
1170 | { | |
1171 | if (s->_raw_size == 0) | |
1172 | { | |
1173 | /* If we don't need this section, strip it from the | |
1174 | output file. This is mostly to handle .rel.bss and | |
1175 | .rel.plt. We must create both sections in | |
1176 | create_dynamic_sections, because they must be created | |
1177 | before the linker maps input sections to output | |
1178 | sections. The linker does that before | |
1179 | adjust_dynamic_symbol is called, and it is that | |
1180 | function which decides whether anything needs to go | |
1181 | into these sections. */ | |
1182 | strip = true; | |
1183 | } | |
1184 | else | |
1185 | { | |
1186 | asection *target; | |
1187 | ||
1188 | /* Remember whether there are any reloc sections other | |
1189 | than .rel.plt. */ | |
1190 | if (strcmp (name, ".rel.plt") != 0) | |
1191 | { | |
1192 | const char *outname; | |
1193 | ||
1194 | relocs = true; | |
1195 | ||
1196 | /* If this relocation section applies to a read only | |
1197 | section, then we probably need a DT_TEXTREL | |
1198 | entry. The entries in the .rel.plt section | |
1199 | really apply to the .got section, which we | |
1200 | created ourselves and so know is not readonly. */ | |
1201 | outname = bfd_get_section_name (output_bfd, | |
1202 | s->output_section); | |
1203 | target = bfd_get_section_by_name (output_bfd, outname + 4); | |
1204 | if (target != NULL | |
1205 | && (target->flags & SEC_READONLY) != 0 | |
1206 | && (target->flags & SEC_ALLOC) != 0) | |
1207 | reltext = true; | |
1208 | } | |
1209 | ||
1210 | /* We use the reloc_count field as a counter if we need | |
1211 | to copy relocs into the output file. */ | |
1212 | s->reloc_count = 0; | |
1213 | } | |
1214 | } | |
1215 | else if (strncmp (name, ".got", 4) != 0) | |
1216 | { | |
1217 | /* It's not one of our sections, so don't allocate space. */ | |
1218 | continue; | |
1219 | } | |
1220 | ||
1221 | if (strip) | |
1222 | { | |
7f8d5fc9 | 1223 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
1224 | continue; |
1225 | } | |
1226 | ||
f69da49f AM |
1227 | /* Allocate memory for the section contents. We use bfd_zalloc |
1228 | here in case unused entries are not reclaimed before the | |
1229 | section's contents are written out. This should not happen, | |
1230 | but this way if it does, we get a R_386_NONE reloc instead | |
1231 | of garbage. */ | |
7a9af8c4 | 1232 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
252b5132 RH |
1233 | if (s->contents == NULL && s->_raw_size != 0) |
1234 | return false; | |
1235 | } | |
1236 | ||
1237 | if (elf_hash_table (info)->dynamic_sections_created) | |
1238 | { | |
1239 | /* Add some entries to the .dynamic section. We fill in the | |
1240 | values later, in elf_i386_finish_dynamic_sections, but we | |
1241 | must add the entries now so that we get the correct size for | |
1242 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1243 | dynamic linker and used by the debugger. */ | |
1244 | if (! info->shared) | |
1245 | { | |
1246 | if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) | |
1247 | return false; | |
1248 | } | |
1249 | ||
1250 | if (plt) | |
1251 | { | |
1252 | if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0) | |
1253 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
1254 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_REL) | |
1255 | || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0)) | |
1256 | return false; | |
1257 | } | |
1258 | ||
1259 | if (relocs) | |
1260 | { | |
1261 | if (! bfd_elf32_add_dynamic_entry (info, DT_REL, 0) | |
1262 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0) | |
1263 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELENT, | |
1264 | sizeof (Elf32_External_Rel))) | |
1265 | return false; | |
1266 | } | |
1267 | ||
1268 | if (reltext) | |
1269 | { | |
1270 | if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
1271 | return false; | |
d6cf2879 | 1272 | info->flags |= DF_TEXTREL; |
252b5132 RH |
1273 | } |
1274 | } | |
1275 | ||
1276 | return true; | |
1277 | } | |
1278 | ||
1279 | /* This function is called via elf_i386_link_hash_traverse if we are | |
f69da49f AM |
1280 | creating a shared object. In the -Bsymbolic case, it discards the |
1281 | space allocated to copy PC relative relocs against symbols which | |
1282 | are defined in regular objects. For the normal non-symbolic case, | |
1283 | we also discard space for relocs that have become local due to | |
6609fa74 | 1284 | symbol visibility changes. We allocated space for them in the |
252b5132 RH |
1285 | check_relocs routine, but we won't fill them in in the |
1286 | relocate_section routine. */ | |
1287 | ||
252b5132 | 1288 | static boolean |
f69da49f | 1289 | elf_i386_discard_copies (h, inf) |
252b5132 | 1290 | struct elf_i386_link_hash_entry *h; |
f69da49f | 1291 | PTR inf; |
252b5132 RH |
1292 | { |
1293 | struct elf_i386_pcrel_relocs_copied *s; | |
f69da49f AM |
1294 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
1295 | ||
1296 | /* If a symbol has been forced local or we have found a regular | |
1297 | definition for the symbolic link case, then we won't be needing | |
1298 | any relocs. */ | |
1299 | if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
1300 | && ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
1301 | || info->symbolic)) | |
1302 | { | |
1303 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) | |
1304 | s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel); | |
1305 | } | |
252b5132 RH |
1306 | |
1307 | return true; | |
1308 | } | |
1309 | ||
1310 | /* Relocate an i386 ELF section. */ | |
1311 | ||
1312 | static boolean | |
1313 | elf_i386_relocate_section (output_bfd, info, input_bfd, input_section, | |
1314 | contents, relocs, local_syms, local_sections) | |
1315 | bfd *output_bfd; | |
1316 | struct bfd_link_info *info; | |
1317 | bfd *input_bfd; | |
1318 | asection *input_section; | |
1319 | bfd_byte *contents; | |
1320 | Elf_Internal_Rela *relocs; | |
1321 | Elf_Internal_Sym *local_syms; | |
1322 | asection **local_sections; | |
1323 | { | |
1324 | bfd *dynobj; | |
1325 | Elf_Internal_Shdr *symtab_hdr; | |
1326 | struct elf_link_hash_entry **sym_hashes; | |
1327 | bfd_vma *local_got_offsets; | |
1328 | asection *sgot; | |
1329 | asection *splt; | |
1330 | asection *sreloc; | |
1331 | Elf_Internal_Rela *rel; | |
1332 | Elf_Internal_Rela *relend; | |
1333 | ||
1334 | dynobj = elf_hash_table (info)->dynobj; | |
1335 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1336 | sym_hashes = elf_sym_hashes (input_bfd); | |
1337 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1338 | ||
252b5132 | 1339 | sreloc = NULL; |
dd5724d5 AM |
1340 | splt = NULL; |
1341 | sgot = NULL; | |
1342 | if (dynobj != NULL) | |
1343 | { | |
1344 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1345 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1346 | } | |
252b5132 RH |
1347 | |
1348 | rel = relocs; | |
1349 | relend = relocs + input_section->reloc_count; | |
1350 | for (; rel < relend; rel++) | |
1351 | { | |
1352 | int r_type; | |
1353 | reloc_howto_type *howto; | |
1354 | unsigned long r_symndx; | |
1355 | struct elf_link_hash_entry *h; | |
1356 | Elf_Internal_Sym *sym; | |
1357 | asection *sec; | |
1358 | bfd_vma relocation; | |
1359 | bfd_reloc_status_type r; | |
1b452ec6 | 1360 | unsigned int indx; |
252b5132 RH |
1361 | |
1362 | r_type = ELF32_R_TYPE (rel->r_info); | |
dc47f327 AM |
1363 | if (r_type == (int) R_386_GNU_VTINHERIT |
1364 | || r_type == (int) R_386_GNU_VTENTRY) | |
252b5132 | 1365 | continue; |
dc47f327 | 1366 | |
1b452ec6 | 1367 | if ((indx = (unsigned) r_type) >= R_386_standard |
dc47f327 AM |
1368 | && ((indx = (unsigned) r_type - R_386_ext_offset) - R_386_standard |
1369 | >= R_386_ext - R_386_standard)) | |
252b5132 RH |
1370 | { |
1371 | bfd_set_error (bfd_error_bad_value); | |
1372 | return false; | |
1373 | } | |
1b452ec6 | 1374 | howto = elf_howto_table + indx; |
252b5132 RH |
1375 | |
1376 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1377 | ||
1378 | if (info->relocateable) | |
1379 | { | |
1380 | /* This is a relocateable link. We don't have to change | |
1381 | anything, unless the reloc is against a section symbol, | |
1382 | in which case we have to adjust according to where the | |
1383 | section symbol winds up in the output section. */ | |
1384 | if (r_symndx < symtab_hdr->sh_info) | |
1385 | { | |
1386 | sym = local_syms + r_symndx; | |
1387 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1388 | { | |
1389 | bfd_vma val; | |
1390 | ||
1391 | sec = local_sections[r_symndx]; | |
1392 | val = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
1393 | val += sec->output_offset + sym->st_value; | |
1394 | bfd_put_32 (input_bfd, val, contents + rel->r_offset); | |
1395 | } | |
1396 | } | |
1397 | ||
1398 | continue; | |
1399 | } | |
1400 | ||
1401 | /* This is a final link. */ | |
1402 | h = NULL; | |
1403 | sym = NULL; | |
1404 | sec = NULL; | |
1405 | if (r_symndx < symtab_hdr->sh_info) | |
1406 | { | |
1407 | sym = local_syms + r_symndx; | |
1408 | sec = local_sections[r_symndx]; | |
1409 | relocation = (sec->output_section->vma | |
1410 | + sec->output_offset | |
1411 | + sym->st_value); | |
1412 | } | |
1413 | else | |
1414 | { | |
1415 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1416 | while (h->root.type == bfd_link_hash_indirect | |
1417 | || h->root.type == bfd_link_hash_warning) | |
1418 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1419 | if (h->root.type == bfd_link_hash_defined | |
1420 | || h->root.type == bfd_link_hash_defweak) | |
1421 | { | |
1422 | sec = h->root.u.def.section; | |
1423 | if (r_type == R_386_GOTPC | |
1424 | || (r_type == R_386_PLT32 | |
dd5724d5 | 1425 | && splt != NULL |
252b5132 RH |
1426 | && h->plt.offset != (bfd_vma) -1) |
1427 | || (r_type == R_386_GOT32 | |
1428 | && elf_hash_table (info)->dynamic_sections_created | |
1429 | && (! info->shared | |
1430 | || (! info->symbolic && h->dynindx != -1) | |
1431 | || (h->elf_link_hash_flags | |
1432 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1433 | || (info->shared | |
1434 | && ((! info->symbolic && h->dynindx != -1) | |
1435 | || (h->elf_link_hash_flags | |
1436 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1437 | && (r_type == R_386_32 | |
1438 | || r_type == R_386_PC32) | |
1439 | && ((input_section->flags & SEC_ALLOC) != 0 | |
1440 | /* DWARF will emit R_386_32 relocations in its | |
1441 | sections against symbols defined externally | |
1442 | in shared libraries. We can't do anything | |
1443 | with them here. */ | |
1319985e AM |
1444 | || ((input_section->flags & SEC_DEBUGGING) != 0 |
1445 | && (h->elf_link_hash_flags | |
1446 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0)))) | |
252b5132 RH |
1447 | { |
1448 | /* In these cases, we don't need the relocation | |
1449 | value. We check specially because in some | |
1450 | obscure cases sec->output_section will be NULL. */ | |
1451 | relocation = 0; | |
1452 | } | |
1453 | else if (sec->output_section == NULL) | |
1454 | { | |
1455 | (*_bfd_error_handler) | |
1456 | (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"), | |
1457 | bfd_get_filename (input_bfd), h->root.root.string, | |
1458 | bfd_get_section_name (input_bfd, input_section)); | |
1459 | relocation = 0; | |
1460 | } | |
1461 | else | |
1462 | relocation = (h->root.u.def.value | |
1463 | + sec->output_section->vma | |
1464 | + sec->output_offset); | |
1465 | } | |
1466 | else if (h->root.type == bfd_link_hash_undefweak) | |
1467 | relocation = 0; | |
3a27a730 L |
1468 | else if (info->shared && !info->symbolic |
1469 | && !info->no_undefined | |
1470 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
252b5132 RH |
1471 | relocation = 0; |
1472 | else | |
1473 | { | |
1474 | if (! ((*info->callbacks->undefined_symbol) | |
1475 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 1476 | input_section, rel->r_offset, |
3a27a730 L |
1477 | (!info->shared || info->no_undefined |
1478 | || ELF_ST_VISIBILITY (h->other))))) | |
252b5132 RH |
1479 | return false; |
1480 | relocation = 0; | |
1481 | } | |
1482 | } | |
1483 | ||
1484 | switch (r_type) | |
1485 | { | |
1486 | case R_386_GOT32: | |
1487 | /* Relocation is to the entry for this symbol in the global | |
1488 | offset table. */ | |
dd5724d5 | 1489 | BFD_ASSERT (sgot != NULL); |
252b5132 RH |
1490 | |
1491 | if (h != NULL) | |
1492 | { | |
1493 | bfd_vma off; | |
1494 | ||
1495 | off = h->got.offset; | |
1496 | BFD_ASSERT (off != (bfd_vma) -1); | |
1497 | ||
1498 | if (! elf_hash_table (info)->dynamic_sections_created | |
1499 | || (info->shared | |
1500 | && (info->symbolic || h->dynindx == -1) | |
1501 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1502 | { | |
1503 | /* This is actually a static link, or it is a | |
1504 | -Bsymbolic link and the symbol is defined | |
1505 | locally, or the symbol was forced to be local | |
1506 | because of a version file. We must initialize | |
1507 | this entry in the global offset table. Since the | |
1508 | offset must always be a multiple of 4, we use the | |
1509 | least significant bit to record whether we have | |
1510 | initialized it already. | |
1511 | ||
1512 | When doing a dynamic link, we create a .rel.got | |
1513 | relocation entry to initialize the value. This | |
1514 | is done in the finish_dynamic_symbol routine. */ | |
1515 | if ((off & 1) != 0) | |
1516 | off &= ~1; | |
1517 | else | |
1518 | { | |
1519 | bfd_put_32 (output_bfd, relocation, | |
1520 | sgot->contents + off); | |
1521 | h->got.offset |= 1; | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | relocation = sgot->output_offset + off; | |
1526 | } | |
1527 | else | |
1528 | { | |
1529 | bfd_vma off; | |
1530 | ||
1531 | BFD_ASSERT (local_got_offsets != NULL | |
1532 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
1533 | ||
1534 | off = local_got_offsets[r_symndx]; | |
1535 | ||
1536 | /* The offset must always be a multiple of 4. We use | |
1537 | the least significant bit to record whether we have | |
1538 | already generated the necessary reloc. */ | |
1539 | if ((off & 1) != 0) | |
1540 | off &= ~1; | |
1541 | else | |
1542 | { | |
1543 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); | |
1544 | ||
1545 | if (info->shared) | |
1546 | { | |
1547 | asection *srelgot; | |
1548 | Elf_Internal_Rel outrel; | |
1549 | ||
1550 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); | |
1551 | BFD_ASSERT (srelgot != NULL); | |
1552 | ||
1553 | outrel.r_offset = (sgot->output_section->vma | |
1554 | + sgot->output_offset | |
1555 | + off); | |
1556 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
1557 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, | |
1558 | (((Elf32_External_Rel *) | |
1559 | srelgot->contents) | |
1560 | + srelgot->reloc_count)); | |
1561 | ++srelgot->reloc_count; | |
1562 | } | |
1563 | ||
1564 | local_got_offsets[r_symndx] |= 1; | |
1565 | } | |
1566 | ||
1567 | relocation = sgot->output_offset + off; | |
1568 | } | |
1569 | ||
1570 | break; | |
1571 | ||
1572 | case R_386_GOTOFF: | |
1573 | /* Relocation is relative to the start of the global offset | |
1574 | table. */ | |
1575 | ||
1576 | if (sgot == NULL) | |
1577 | { | |
1578 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1579 | BFD_ASSERT (sgot != NULL); | |
1580 | } | |
1581 | ||
1582 | /* Note that sgot->output_offset is not involved in this | |
1583 | calculation. We always want the start of .got. If we | |
1584 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
1585 | permitted by the ABI, we might have to change this | |
1586 | calculation. */ | |
1587 | relocation -= sgot->output_section->vma; | |
1588 | ||
1589 | break; | |
1590 | ||
1591 | case R_386_GOTPC: | |
1592 | /* Use global offset table as symbol value. */ | |
1593 | ||
1594 | if (sgot == NULL) | |
1595 | { | |
1596 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1597 | BFD_ASSERT (sgot != NULL); | |
1598 | } | |
1599 | ||
1600 | relocation = sgot->output_section->vma; | |
1601 | ||
1602 | break; | |
1603 | ||
1604 | case R_386_PLT32: | |
1605 | /* Relocation is to the entry for this symbol in the | |
1606 | procedure linkage table. */ | |
1607 | ||
dd5724d5 | 1608 | /* Resolve a PLT32 reloc against a local symbol directly, |
252b5132 RH |
1609 | without using the procedure linkage table. */ |
1610 | if (h == NULL) | |
1611 | break; | |
1612 | ||
dd5724d5 AM |
1613 | if (h->plt.offset == (bfd_vma) -1 |
1614 | || splt == NULL) | |
252b5132 RH |
1615 | { |
1616 | /* We didn't make a PLT entry for this symbol. This | |
1617 | happens when statically linking PIC code, or when | |
1618 | using -Bsymbolic. */ | |
1619 | break; | |
1620 | } | |
1621 | ||
252b5132 RH |
1622 | relocation = (splt->output_section->vma |
1623 | + splt->output_offset | |
1624 | + h->plt.offset); | |
1625 | ||
1626 | break; | |
1627 | ||
1628 | case R_386_32: | |
1629 | case R_386_PC32: | |
1630 | if (info->shared | |
1631 | && (input_section->flags & SEC_ALLOC) != 0 | |
1632 | && (r_type != R_386_PC32 | |
1633 | || (h != NULL | |
1634 | && h->dynindx != -1 | |
1635 | && (! info->symbolic | |
1636 | || (h->elf_link_hash_flags | |
1637 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
1638 | { | |
1639 | Elf_Internal_Rel outrel; | |
1640 | boolean skip, relocate; | |
1641 | ||
1642 | /* When generating a shared object, these relocations | |
1643 | are copied into the output file to be resolved at run | |
1644 | time. */ | |
1645 | ||
1646 | if (sreloc == NULL) | |
1647 | { | |
1648 | const char *name; | |
1649 | ||
1650 | name = (bfd_elf_string_from_elf_section | |
1651 | (input_bfd, | |
1652 | elf_elfheader (input_bfd)->e_shstrndx, | |
1653 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1654 | if (name == NULL) | |
1655 | return false; | |
1656 | ||
c8492176 L |
1657 | if (strncmp (name, ".rel", 4) != 0 |
1658 | || strcmp (bfd_get_section_name (input_bfd, | |
1659 | input_section), | |
1660 | name + 4) != 0) | |
1661 | { | |
1662 | if (input_bfd->my_archive) | |
1663 | (*_bfd_error_handler) (_("%s(%s): bad relocation section name `%s\'"), | |
1664 | bfd_get_filename (input_bfd->my_archive), | |
1665 | bfd_get_filename (input_bfd), | |
1666 | name); | |
1667 | else | |
1668 | (*_bfd_error_handler) (_("%s: bad relocation section name `%s\'"), | |
1669 | bfd_get_filename (input_bfd), | |
1670 | name); | |
1671 | return false; | |
1672 | } | |
252b5132 RH |
1673 | |
1674 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1675 | BFD_ASSERT (sreloc != NULL); | |
1676 | } | |
1677 | ||
1678 | skip = false; | |
1679 | ||
1680 | if (elf_section_data (input_section)->stab_info == NULL) | |
1681 | outrel.r_offset = rel->r_offset; | |
1682 | else | |
1683 | { | |
1684 | bfd_vma off; | |
1685 | ||
1686 | off = (_bfd_stab_section_offset | |
1687 | (output_bfd, &elf_hash_table (info)->stab_info, | |
1688 | input_section, | |
1689 | &elf_section_data (input_section)->stab_info, | |
1690 | rel->r_offset)); | |
1691 | if (off == (bfd_vma) -1) | |
1692 | skip = true; | |
1693 | outrel.r_offset = off; | |
1694 | } | |
1695 | ||
1696 | outrel.r_offset += (input_section->output_section->vma | |
1697 | + input_section->output_offset); | |
1698 | ||
1699 | if (skip) | |
1700 | { | |
1701 | memset (&outrel, 0, sizeof outrel); | |
1702 | relocate = false; | |
1703 | } | |
1704 | else if (r_type == R_386_PC32) | |
1705 | { | |
1706 | BFD_ASSERT (h != NULL && h->dynindx != -1); | |
1707 | relocate = false; | |
1708 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_386_PC32); | |
1709 | } | |
1710 | else | |
1711 | { | |
1712 | /* h->dynindx may be -1 if this symbol was marked to | |
1713 | become local. */ | |
1714 | if (h == NULL | |
1715 | || ((info->symbolic || h->dynindx == -1) | |
1716 | && (h->elf_link_hash_flags | |
1717 | & ELF_LINK_HASH_DEF_REGULAR) != 0)) | |
1718 | { | |
1719 | relocate = true; | |
1720 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
1721 | } | |
1722 | else | |
1723 | { | |
1724 | BFD_ASSERT (h->dynindx != -1); | |
1725 | relocate = false; | |
1726 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_386_32); | |
1727 | } | |
1728 | } | |
1729 | ||
1730 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, | |
1731 | (((Elf32_External_Rel *) | |
1732 | sreloc->contents) | |
1733 | + sreloc->reloc_count)); | |
1734 | ++sreloc->reloc_count; | |
1735 | ||
1736 | /* If this reloc is against an external symbol, we do | |
1737 | not want to fiddle with the addend. Otherwise, we | |
1738 | need to include the symbol value so that it becomes | |
1739 | an addend for the dynamic reloc. */ | |
1740 | if (! relocate) | |
1741 | continue; | |
1742 | } | |
1743 | ||
1744 | break; | |
1745 | ||
1746 | default: | |
1747 | break; | |
1748 | } | |
1749 | ||
1750 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1751 | contents, rel->r_offset, | |
1752 | relocation, (bfd_vma) 0); | |
1753 | ||
1754 | if (r != bfd_reloc_ok) | |
1755 | { | |
1756 | switch (r) | |
1757 | { | |
1758 | default: | |
1759 | case bfd_reloc_outofrange: | |
1760 | abort (); | |
1761 | case bfd_reloc_overflow: | |
1762 | { | |
1763 | const char *name; | |
1764 | ||
1765 | if (h != NULL) | |
1766 | name = h->root.root.string; | |
1767 | else | |
1768 | { | |
1769 | name = bfd_elf_string_from_elf_section (input_bfd, | |
1770 | symtab_hdr->sh_link, | |
1771 | sym->st_name); | |
1772 | if (name == NULL) | |
1773 | return false; | |
1774 | if (*name == '\0') | |
1775 | name = bfd_section_name (input_bfd, sec); | |
1776 | } | |
1777 | if (! ((*info->callbacks->reloc_overflow) | |
1778 | (info, name, howto->name, (bfd_vma) 0, | |
1779 | input_bfd, input_section, rel->r_offset))) | |
1780 | return false; | |
1781 | } | |
1782 | break; | |
1783 | } | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | return true; | |
1788 | } | |
1789 | ||
1790 | /* Finish up dynamic symbol handling. We set the contents of various | |
1791 | dynamic sections here. */ | |
1792 | ||
1793 | static boolean | |
1794 | elf_i386_finish_dynamic_symbol (output_bfd, info, h, sym) | |
1795 | bfd *output_bfd; | |
1796 | struct bfd_link_info *info; | |
1797 | struct elf_link_hash_entry *h; | |
1798 | Elf_Internal_Sym *sym; | |
1799 | { | |
1800 | bfd *dynobj; | |
1801 | ||
1802 | dynobj = elf_hash_table (info)->dynobj; | |
1803 | ||
1804 | if (h->plt.offset != (bfd_vma) -1) | |
1805 | { | |
1806 | asection *splt; | |
1807 | asection *sgot; | |
1808 | asection *srel; | |
1809 | bfd_vma plt_index; | |
1810 | bfd_vma got_offset; | |
1811 | Elf_Internal_Rel rel; | |
1812 | ||
1813 | /* This symbol has an entry in the procedure linkage table. Set | |
1814 | it up. */ | |
1815 | ||
1816 | BFD_ASSERT (h->dynindx != -1); | |
1817 | ||
1818 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1819 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1820 | srel = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
1821 | BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL); | |
1822 | ||
1823 | /* Get the index in the procedure linkage table which | |
1824 | corresponds to this symbol. This is the index of this symbol | |
1825 | in all the symbols for which we are making plt entries. The | |
1826 | first entry in the procedure linkage table is reserved. */ | |
1827 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
1828 | ||
1829 | /* Get the offset into the .got table of the entry that | |
1830 | corresponds to this function. Each .got entry is 4 bytes. | |
1831 | The first three are reserved. */ | |
1832 | got_offset = (plt_index + 3) * 4; | |
1833 | ||
1834 | /* Fill in the entry in the procedure linkage table. */ | |
1835 | if (! info->shared) | |
1836 | { | |
1837 | memcpy (splt->contents + h->plt.offset, elf_i386_plt_entry, | |
1838 | PLT_ENTRY_SIZE); | |
1839 | bfd_put_32 (output_bfd, | |
1840 | (sgot->output_section->vma | |
1841 | + sgot->output_offset | |
1842 | + got_offset), | |
1843 | splt->contents + h->plt.offset + 2); | |
1844 | } | |
1845 | else | |
1846 | { | |
1847 | memcpy (splt->contents + h->plt.offset, elf_i386_pic_plt_entry, | |
1848 | PLT_ENTRY_SIZE); | |
1849 | bfd_put_32 (output_bfd, got_offset, | |
1850 | splt->contents + h->plt.offset + 2); | |
1851 | } | |
1852 | ||
1853 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel), | |
1854 | splt->contents + h->plt.offset + 7); | |
1855 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
1856 | splt->contents + h->plt.offset + 12); | |
1857 | ||
1858 | /* Fill in the entry in the global offset table. */ | |
1859 | bfd_put_32 (output_bfd, | |
1860 | (splt->output_section->vma | |
1861 | + splt->output_offset | |
1862 | + h->plt.offset | |
1863 | + 6), | |
1864 | sgot->contents + got_offset); | |
1865 | ||
1866 | /* Fill in the entry in the .rel.plt section. */ | |
1867 | rel.r_offset = (sgot->output_section->vma | |
1868 | + sgot->output_offset | |
1869 | + got_offset); | |
1870 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
1871 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
1872 | ((Elf32_External_Rel *) srel->contents | |
1873 | + plt_index)); | |
1874 | ||
1875 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1876 | { | |
1877 | /* Mark the symbol as undefined, rather than as defined in | |
1878 | the .plt section. Leave the value alone. */ | |
1879 | sym->st_shndx = SHN_UNDEF; | |
1880 | } | |
1881 | } | |
1882 | ||
1883 | if (h->got.offset != (bfd_vma) -1) | |
1884 | { | |
1885 | asection *sgot; | |
1886 | asection *srel; | |
1887 | Elf_Internal_Rel rel; | |
1888 | ||
1889 | /* This symbol has an entry in the global offset table. Set it | |
1890 | up. */ | |
1891 | ||
1892 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1893 | srel = bfd_get_section_by_name (dynobj, ".rel.got"); | |
1894 | BFD_ASSERT (sgot != NULL && srel != NULL); | |
1895 | ||
1896 | rel.r_offset = (sgot->output_section->vma | |
1897 | + sgot->output_offset | |
1898 | + (h->got.offset &~ 1)); | |
1899 | ||
dd5724d5 AM |
1900 | /* If this is a static link, or it is a -Bsymbolic link and the |
1901 | symbol is defined locally or was forced to be local because | |
1902 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
1903 | The entry in the global offset table will already have been |
1904 | initialized in the relocate_section function. */ | |
dd5724d5 AM |
1905 | if (! elf_hash_table (info)->dynamic_sections_created |
1906 | || (info->shared | |
1907 | && (info->symbolic || h->dynindx == -1) | |
1908 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1909 | { | |
1910 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
1911 | } | |
252b5132 RH |
1912 | else |
1913 | { | |
dd5724d5 | 1914 | BFD_ASSERT((h->got.offset & 1) == 0); |
252b5132 RH |
1915 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
1916 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); | |
1917 | } | |
1918 | ||
1919 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
1920 | ((Elf32_External_Rel *) srel->contents | |
1921 | + srel->reloc_count)); | |
1922 | ++srel->reloc_count; | |
1923 | } | |
1924 | ||
791987af | 1925 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
252b5132 RH |
1926 | { |
1927 | asection *s; | |
1928 | Elf_Internal_Rel rel; | |
1929 | ||
1930 | /* This symbol needs a copy reloc. Set it up. */ | |
1931 | ||
1932 | BFD_ASSERT (h->dynindx != -1 | |
1933 | && (h->root.type == bfd_link_hash_defined | |
1934 | || h->root.type == bfd_link_hash_defweak)); | |
1935 | ||
1936 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
1937 | ".rel.bss"); | |
1938 | BFD_ASSERT (s != NULL); | |
1939 | ||
1940 | rel.r_offset = (h->root.u.def.value | |
1941 | + h->root.u.def.section->output_section->vma | |
1942 | + h->root.u.def.section->output_offset); | |
1943 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
1944 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
1945 | ((Elf32_External_Rel *) s->contents | |
1946 | + s->reloc_count)); | |
1947 | ++s->reloc_count; | |
1948 | } | |
1949 | ||
1950 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
1951 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
1952 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1953 | sym->st_shndx = SHN_ABS; | |
1954 | ||
1955 | return true; | |
1956 | } | |
1957 | ||
1958 | /* Finish up the dynamic sections. */ | |
1959 | ||
1960 | static boolean | |
1961 | elf_i386_finish_dynamic_sections (output_bfd, info) | |
1962 | bfd *output_bfd; | |
1963 | struct bfd_link_info *info; | |
1964 | { | |
1965 | bfd *dynobj; | |
1966 | asection *sgot; | |
1967 | asection *sdyn; | |
1968 | ||
1969 | dynobj = elf_hash_table (info)->dynobj; | |
1970 | ||
1971 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1972 | BFD_ASSERT (sgot != NULL); | |
1973 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1974 | ||
1975 | if (elf_hash_table (info)->dynamic_sections_created) | |
1976 | { | |
1977 | asection *splt; | |
1978 | Elf32_External_Dyn *dyncon, *dynconend; | |
1979 | ||
1980 | BFD_ASSERT (sdyn != NULL); | |
1981 | ||
1982 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
1983 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
1984 | for (; dyncon < dynconend; dyncon++) | |
1985 | { | |
1986 | Elf_Internal_Dyn dyn; | |
1987 | const char *name; | |
1988 | asection *s; | |
1989 | ||
1990 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
1991 | ||
1992 | switch (dyn.d_tag) | |
1993 | { | |
1994 | default: | |
1995 | break; | |
1996 | ||
1997 | case DT_PLTGOT: | |
1998 | name = ".got"; | |
1999 | goto get_vma; | |
2000 | case DT_JMPREL: | |
2001 | name = ".rel.plt"; | |
2002 | get_vma: | |
2003 | s = bfd_get_section_by_name (output_bfd, name); | |
2004 | BFD_ASSERT (s != NULL); | |
2005 | dyn.d_un.d_ptr = s->vma; | |
2006 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2007 | break; | |
2008 | ||
2009 | case DT_PLTRELSZ: | |
2010 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
2011 | BFD_ASSERT (s != NULL); | |
2012 | if (s->_cooked_size != 0) | |
2013 | dyn.d_un.d_val = s->_cooked_size; | |
2014 | else | |
2015 | dyn.d_un.d_val = s->_raw_size; | |
2016 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2017 | break; | |
2018 | ||
2019 | case DT_RELSZ: | |
2020 | /* My reading of the SVR4 ABI indicates that the | |
2021 | procedure linkage table relocs (DT_JMPREL) should be | |
2022 | included in the overall relocs (DT_REL). This is | |
2023 | what Solaris does. However, UnixWare can not handle | |
2024 | that case. Therefore, we override the DT_RELSZ entry | |
2025 | here to make it not include the JMPREL relocs. Since | |
2026 | the linker script arranges for .rel.plt to follow all | |
2027 | other relocation sections, we don't have to worry | |
2028 | about changing the DT_REL entry. */ | |
2029 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
2030 | if (s != NULL) | |
2031 | { | |
2032 | if (s->_cooked_size != 0) | |
2033 | dyn.d_un.d_val -= s->_cooked_size; | |
2034 | else | |
2035 | dyn.d_un.d_val -= s->_raw_size; | |
2036 | } | |
2037 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2038 | break; | |
2039 | } | |
2040 | } | |
2041 | ||
2042 | /* Fill in the first entry in the procedure linkage table. */ | |
2043 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
2044 | if (splt && splt->_raw_size > 0) | |
2045 | { | |
2046 | if (info->shared) | |
2047 | memcpy (splt->contents, elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE); | |
2048 | else | |
2049 | { | |
2050 | memcpy (splt->contents, elf_i386_plt0_entry, PLT_ENTRY_SIZE); | |
2051 | bfd_put_32 (output_bfd, | |
2052 | sgot->output_section->vma + sgot->output_offset + 4, | |
2053 | splt->contents + 2); | |
2054 | bfd_put_32 (output_bfd, | |
2055 | sgot->output_section->vma + sgot->output_offset + 8, | |
2056 | splt->contents + 8); | |
2057 | } | |
2058 | ||
2059 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
2060 | really seem like the right value. */ | |
2061 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; | |
2062 | } | |
2063 | } | |
2064 | ||
2065 | /* Fill in the first three entries in the global offset table. */ | |
2066 | if (sgot->_raw_size > 0) | |
2067 | { | |
2068 | if (sdyn == NULL) | |
2069 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
2070 | else | |
2071 | bfd_put_32 (output_bfd, | |
2072 | sdyn->output_section->vma + sdyn->output_offset, | |
2073 | sgot->contents); | |
2074 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
2075 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
2076 | } | |
2077 | ||
2078 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
2079 | ||
2080 | return true; | |
2081 | } | |
2082 | ||
dd484e5c L |
2083 | /* Set the correct type for an x86 ELF section. We do this by the |
2084 | section name, which is a hack, but ought to work. */ | |
2085 | ||
2086 | static boolean | |
2087 | elf_i386_fake_sections (abfd, hdr, sec) | |
2088 | bfd *abfd ATTRIBUTE_UNUSED; | |
2089 | Elf32_Internal_Shdr *hdr; | |
2090 | asection *sec; | |
2091 | { | |
2092 | register const char *name; | |
2093 | ||
2094 | name = bfd_get_section_name (abfd, sec); | |
2095 | ||
2096 | if (strcmp (name, ".reloc") == 0) | |
2097 | /* | |
2098 | * This is an ugly, but unfortunately necessary hack that is | |
2099 | * needed when producing EFI binaries on x86. It tells | |
2100 | * elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
2101 | * containing ELF relocation info. We need this hack in order to | |
2102 | * be able to generate ELF binaries that can be translated into | |
2103 | * EFI applications (which are essentially COFF objects). Those | |
2104 | * files contain a COFF ".reloc" section inside an ELFNN object, | |
2105 | * which would normally cause BFD to segfault because it would | |
2106 | * attempt to interpret this section as containing relocation | |
2107 | * entries for section "oc". With this hack enabled, ".reloc" | |
2108 | * will be treated as a normal data section, which will avoid the | |
2109 | * segfault. However, you won't be able to create an ELFNN binary | |
2110 | * with a section named "oc" that needs relocations, but that's | |
2111 | * the kind of ugly side-effects you get when detecting section | |
2112 | * types based on their names... In practice, this limitation is | |
2113 | * unlikely to bite. | |
2114 | */ | |
2115 | hdr->sh_type = SHT_PROGBITS; | |
2116 | ||
2117 | return true; | |
2118 | } | |
2119 | ||
2120 | ||
252b5132 RH |
2121 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vec |
2122 | #define TARGET_LITTLE_NAME "elf32-i386" | |
2123 | #define ELF_ARCH bfd_arch_i386 | |
2124 | #define ELF_MACHINE_CODE EM_386 | |
2125 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
2126 | |
2127 | #define elf_backend_can_gc_sections 1 | |
2128 | #define elf_backend_want_got_plt 1 | |
2129 | #define elf_backend_plt_readonly 1 | |
2130 | #define elf_backend_want_plt_sym 0 | |
2131 | #define elf_backend_got_header_size 12 | |
2132 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
2133 | ||
dd5724d5 AM |
2134 | #define elf_info_to_howto elf_i386_info_to_howto |
2135 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel | |
2136 | ||
2137 | #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link | |
2138 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name | |
2139 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
2140 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup | |
2141 | ||
2142 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
2143 | #define elf_backend_check_relocs elf_i386_check_relocs | |
2144 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections | |
2145 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections | |
2146 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
2147 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook | |
2148 | #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook | |
2149 | #define elf_backend_relocate_section elf_i386_relocate_section | |
2150 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
dd484e5c | 2151 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 | 2152 | |
252b5132 | 2153 | #include "elf32-target.h" |