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1 | /* ELF executable support for BFD. | |
2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 | |
3 | Free Software Foundation, Inc. | |
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 | /* | |
22 | ||
23 | SECTION | |
24 | ELF backends | |
25 | ||
26 | BFD support for ELF formats is being worked on. | |
27 | Currently, the best supported back ends are for sparc and i386 | |
28 | (running svr4 or Solaris 2). | |
29 | ||
30 | Documentation of the internals of the support code still needs | |
31 | to be written. The code is changing quickly enough that we | |
32 | haven't bothered yet. | |
33 | */ | |
34 | ||
35 | /* For sparc64-cross-sparc32. */ | |
36 | #define _SYSCALL32 | |
37 | #include "bfd.h" | |
38 | #include "sysdep.h" | |
39 | #include "bfdlink.h" | |
40 | #include "libbfd.h" | |
41 | #define ARCH_SIZE 0 | |
42 | #include "elf-bfd.h" | |
43 | ||
44 | static INLINE struct elf_segment_map *make_mapping | |
45 | PARAMS ((bfd *, asection **, unsigned int, unsigned int, boolean)); | |
46 | static boolean map_sections_to_segments PARAMS ((bfd *)); | |
47 | static int elf_sort_sections PARAMS ((const PTR, const PTR)); | |
48 | static boolean assign_file_positions_for_segments PARAMS ((bfd *)); | |
49 | static boolean assign_file_positions_except_relocs PARAMS ((bfd *)); | |
50 | static boolean prep_headers PARAMS ((bfd *)); | |
51 | static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **, int)); | |
52 | static boolean copy_private_bfd_data PARAMS ((bfd *, bfd *)); | |
53 | static char *elf_read PARAMS ((bfd *, long, unsigned int)); | |
54 | static void elf_fake_sections PARAMS ((bfd *, asection *, PTR)); | |
55 | static boolean assign_section_numbers PARAMS ((bfd *)); | |
56 | static INLINE int sym_is_global PARAMS ((bfd *, asymbol *)); | |
57 | static boolean elf_map_symbols PARAMS ((bfd *)); | |
58 | static bfd_size_type get_program_header_size PARAMS ((bfd *)); | |
59 | static boolean elfcore_read_notes PARAMS ((bfd *, bfd_vma, bfd_vma)); | |
60 | static boolean elf_find_function PARAMS ((bfd *, asection *, asymbol **, | |
61 | bfd_vma, const char **, | |
62 | const char **)); | |
63 | static int elfcore_make_pid PARAMS ((bfd *)); | |
64 | static boolean elfcore_maybe_make_sect PARAMS ((bfd *, char *, asection *)); | |
65 | static boolean elfcore_make_note_pseudosection PARAMS ((bfd *, char *, | |
66 | Elf_Internal_Note *)); | |
67 | static boolean elfcore_grok_prfpreg PARAMS ((bfd *, Elf_Internal_Note *)); | |
68 | static boolean elfcore_grok_prxfpreg PARAMS ((bfd *, Elf_Internal_Note *)); | |
69 | static boolean elfcore_grok_note PARAMS ((bfd *, Elf_Internal_Note *)); | |
70 | ||
71 | /* Swap version information in and out. The version information is | |
72 | currently size independent. If that ever changes, this code will | |
73 | need to move into elfcode.h. */ | |
74 | ||
75 | /* Swap in a Verdef structure. */ | |
76 | ||
77 | void | |
78 | _bfd_elf_swap_verdef_in (abfd, src, dst) | |
79 | bfd *abfd; | |
80 | const Elf_External_Verdef *src; | |
81 | Elf_Internal_Verdef *dst; | |
82 | { | |
83 | dst->vd_version = bfd_h_get_16 (abfd, src->vd_version); | |
84 | dst->vd_flags = bfd_h_get_16 (abfd, src->vd_flags); | |
85 | dst->vd_ndx = bfd_h_get_16 (abfd, src->vd_ndx); | |
86 | dst->vd_cnt = bfd_h_get_16 (abfd, src->vd_cnt); | |
87 | dst->vd_hash = bfd_h_get_32 (abfd, src->vd_hash); | |
88 | dst->vd_aux = bfd_h_get_32 (abfd, src->vd_aux); | |
89 | dst->vd_next = bfd_h_get_32 (abfd, src->vd_next); | |
90 | } | |
91 | ||
92 | /* Swap out a Verdef structure. */ | |
93 | ||
94 | void | |
95 | _bfd_elf_swap_verdef_out (abfd, src, dst) | |
96 | bfd *abfd; | |
97 | const Elf_Internal_Verdef *src; | |
98 | Elf_External_Verdef *dst; | |
99 | { | |
100 | bfd_h_put_16 (abfd, src->vd_version, dst->vd_version); | |
101 | bfd_h_put_16 (abfd, src->vd_flags, dst->vd_flags); | |
102 | bfd_h_put_16 (abfd, src->vd_ndx, dst->vd_ndx); | |
103 | bfd_h_put_16 (abfd, src->vd_cnt, dst->vd_cnt); | |
104 | bfd_h_put_32 (abfd, src->vd_hash, dst->vd_hash); | |
105 | bfd_h_put_32 (abfd, src->vd_aux, dst->vd_aux); | |
106 | bfd_h_put_32 (abfd, src->vd_next, dst->vd_next); | |
107 | } | |
108 | ||
109 | /* Swap in a Verdaux structure. */ | |
110 | ||
111 | void | |
112 | _bfd_elf_swap_verdaux_in (abfd, src, dst) | |
113 | bfd *abfd; | |
114 | const Elf_External_Verdaux *src; | |
115 | Elf_Internal_Verdaux *dst; | |
116 | { | |
117 | dst->vda_name = bfd_h_get_32 (abfd, src->vda_name); | |
118 | dst->vda_next = bfd_h_get_32 (abfd, src->vda_next); | |
119 | } | |
120 | ||
121 | /* Swap out a Verdaux structure. */ | |
122 | ||
123 | void | |
124 | _bfd_elf_swap_verdaux_out (abfd, src, dst) | |
125 | bfd *abfd; | |
126 | const Elf_Internal_Verdaux *src; | |
127 | Elf_External_Verdaux *dst; | |
128 | { | |
129 | bfd_h_put_32 (abfd, src->vda_name, dst->vda_name); | |
130 | bfd_h_put_32 (abfd, src->vda_next, dst->vda_next); | |
131 | } | |
132 | ||
133 | /* Swap in a Verneed structure. */ | |
134 | ||
135 | void | |
136 | _bfd_elf_swap_verneed_in (abfd, src, dst) | |
137 | bfd *abfd; | |
138 | const Elf_External_Verneed *src; | |
139 | Elf_Internal_Verneed *dst; | |
140 | { | |
141 | dst->vn_version = bfd_h_get_16 (abfd, src->vn_version); | |
142 | dst->vn_cnt = bfd_h_get_16 (abfd, src->vn_cnt); | |
143 | dst->vn_file = bfd_h_get_32 (abfd, src->vn_file); | |
144 | dst->vn_aux = bfd_h_get_32 (abfd, src->vn_aux); | |
145 | dst->vn_next = bfd_h_get_32 (abfd, src->vn_next); | |
146 | } | |
147 | ||
148 | /* Swap out a Verneed structure. */ | |
149 | ||
150 | void | |
151 | _bfd_elf_swap_verneed_out (abfd, src, dst) | |
152 | bfd *abfd; | |
153 | const Elf_Internal_Verneed *src; | |
154 | Elf_External_Verneed *dst; | |
155 | { | |
156 | bfd_h_put_16 (abfd, src->vn_version, dst->vn_version); | |
157 | bfd_h_put_16 (abfd, src->vn_cnt, dst->vn_cnt); | |
158 | bfd_h_put_32 (abfd, src->vn_file, dst->vn_file); | |
159 | bfd_h_put_32 (abfd, src->vn_aux, dst->vn_aux); | |
160 | bfd_h_put_32 (abfd, src->vn_next, dst->vn_next); | |
161 | } | |
162 | ||
163 | /* Swap in a Vernaux structure. */ | |
164 | ||
165 | void | |
166 | _bfd_elf_swap_vernaux_in (abfd, src, dst) | |
167 | bfd *abfd; | |
168 | const Elf_External_Vernaux *src; | |
169 | Elf_Internal_Vernaux *dst; | |
170 | { | |
171 | dst->vna_hash = bfd_h_get_32 (abfd, src->vna_hash); | |
172 | dst->vna_flags = bfd_h_get_16 (abfd, src->vna_flags); | |
173 | dst->vna_other = bfd_h_get_16 (abfd, src->vna_other); | |
174 | dst->vna_name = bfd_h_get_32 (abfd, src->vna_name); | |
175 | dst->vna_next = bfd_h_get_32 (abfd, src->vna_next); | |
176 | } | |
177 | ||
178 | /* Swap out a Vernaux structure. */ | |
179 | ||
180 | void | |
181 | _bfd_elf_swap_vernaux_out (abfd, src, dst) | |
182 | bfd *abfd; | |
183 | const Elf_Internal_Vernaux *src; | |
184 | Elf_External_Vernaux *dst; | |
185 | { | |
186 | bfd_h_put_32 (abfd, src->vna_hash, dst->vna_hash); | |
187 | bfd_h_put_16 (abfd, src->vna_flags, dst->vna_flags); | |
188 | bfd_h_put_16 (abfd, src->vna_other, dst->vna_other); | |
189 | bfd_h_put_32 (abfd, src->vna_name, dst->vna_name); | |
190 | bfd_h_put_32 (abfd, src->vna_next, dst->vna_next); | |
191 | } | |
192 | ||
193 | /* Swap in a Versym structure. */ | |
194 | ||
195 | void | |
196 | _bfd_elf_swap_versym_in (abfd, src, dst) | |
197 | bfd *abfd; | |
198 | const Elf_External_Versym *src; | |
199 | Elf_Internal_Versym *dst; | |
200 | { | |
201 | dst->vs_vers = bfd_h_get_16 (abfd, src->vs_vers); | |
202 | } | |
203 | ||
204 | /* Swap out a Versym structure. */ | |
205 | ||
206 | void | |
207 | _bfd_elf_swap_versym_out (abfd, src, dst) | |
208 | bfd *abfd; | |
209 | const Elf_Internal_Versym *src; | |
210 | Elf_External_Versym *dst; | |
211 | { | |
212 | bfd_h_put_16 (abfd, src->vs_vers, dst->vs_vers); | |
213 | } | |
214 | ||
215 | /* Standard ELF hash function. Do not change this function; you will | |
216 | cause invalid hash tables to be generated. */ | |
217 | ||
218 | unsigned long | |
219 | bfd_elf_hash (namearg) | |
220 | const char *namearg; | |
221 | { | |
222 | const unsigned char *name = (const unsigned char *) namearg; | |
223 | unsigned long h = 0; | |
224 | unsigned long g; | |
225 | int ch; | |
226 | ||
227 | while ((ch = *name++) != '\0') | |
228 | { | |
229 | h = (h << 4) + ch; | |
230 | if ((g = (h & 0xf0000000)) != 0) | |
231 | { | |
232 | h ^= g >> 24; | |
233 | /* The ELF ABI says `h &= ~g', but this is equivalent in | |
234 | this case and on some machines one insn instead of two. */ | |
235 | h ^= g; | |
236 | } | |
237 | } | |
238 | return h; | |
239 | } | |
240 | ||
241 | /* Read a specified number of bytes at a specified offset in an ELF | |
242 | file, into a newly allocated buffer, and return a pointer to the | |
243 | buffer. */ | |
244 | ||
245 | static char * | |
246 | elf_read (abfd, offset, size) | |
247 | bfd *abfd; | |
248 | long offset; | |
249 | unsigned int size; | |
250 | { | |
251 | char *buf; | |
252 | ||
253 | if ((buf = bfd_alloc (abfd, size)) == NULL) | |
254 | return NULL; | |
255 | if (bfd_seek (abfd, offset, SEEK_SET) == -1) | |
256 | return NULL; | |
257 | if (bfd_read ((PTR) buf, size, 1, abfd) != size) | |
258 | { | |
259 | if (bfd_get_error () != bfd_error_system_call) | |
260 | bfd_set_error (bfd_error_file_truncated); | |
261 | return NULL; | |
262 | } | |
263 | return buf; | |
264 | } | |
265 | ||
266 | boolean | |
267 | bfd_elf_mkobject (abfd) | |
268 | bfd *abfd; | |
269 | { | |
270 | /* This just does initialization. */ | |
271 | /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */ | |
272 | elf_tdata (abfd) = (struct elf_obj_tdata *) | |
273 | bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
274 | if (elf_tdata (abfd) == 0) | |
275 | return false; | |
276 | /* Since everything is done at close time, do we need any | |
277 | initialization? */ | |
278 | ||
279 | return true; | |
280 | } | |
281 | ||
282 | boolean | |
283 | bfd_elf_mkcorefile (abfd) | |
284 | bfd *abfd; | |
285 | { | |
286 | /* I think this can be done just like an object file. */ | |
287 | return bfd_elf_mkobject (abfd); | |
288 | } | |
289 | ||
290 | char * | |
291 | bfd_elf_get_str_section (abfd, shindex) | |
292 | bfd *abfd; | |
293 | unsigned int shindex; | |
294 | { | |
295 | Elf_Internal_Shdr **i_shdrp; | |
296 | char *shstrtab = NULL; | |
297 | unsigned int offset; | |
298 | unsigned int shstrtabsize; | |
299 | ||
300 | i_shdrp = elf_elfsections (abfd); | |
301 | if (i_shdrp == 0 || i_shdrp[shindex] == 0) | |
302 | return 0; | |
303 | ||
304 | shstrtab = (char *) i_shdrp[shindex]->contents; | |
305 | if (shstrtab == NULL) | |
306 | { | |
307 | /* No cached one, attempt to read, and cache what we read. */ | |
308 | offset = i_shdrp[shindex]->sh_offset; | |
309 | shstrtabsize = i_shdrp[shindex]->sh_size; | |
310 | shstrtab = elf_read (abfd, offset, shstrtabsize); | |
311 | i_shdrp[shindex]->contents = (PTR) shstrtab; | |
312 | } | |
313 | return shstrtab; | |
314 | } | |
315 | ||
316 | char * | |
317 | bfd_elf_string_from_elf_section (abfd, shindex, strindex) | |
318 | bfd *abfd; | |
319 | unsigned int shindex; | |
320 | unsigned int strindex; | |
321 | { | |
322 | Elf_Internal_Shdr *hdr; | |
323 | ||
324 | if (strindex == 0) | |
325 | return ""; | |
326 | ||
327 | hdr = elf_elfsections (abfd)[shindex]; | |
328 | ||
329 | if (hdr->contents == NULL | |
330 | && bfd_elf_get_str_section (abfd, shindex) == NULL) | |
331 | return NULL; | |
332 | ||
333 | if (strindex >= hdr->sh_size) | |
334 | { | |
335 | (*_bfd_error_handler) | |
336 | (_("%s: invalid string offset %u >= %lu for section `%s'"), | |
337 | bfd_get_filename (abfd), strindex, (unsigned long) hdr->sh_size, | |
338 | ((shindex == elf_elfheader(abfd)->e_shstrndx | |
339 | && strindex == hdr->sh_name) | |
340 | ? ".shstrtab" | |
341 | : elf_string_from_elf_strtab (abfd, hdr->sh_name))); | |
342 | return ""; | |
343 | } | |
344 | ||
345 | return ((char *) hdr->contents) + strindex; | |
346 | } | |
347 | ||
348 | /* Make a BFD section from an ELF section. We store a pointer to the | |
349 | BFD section in the bfd_section field of the header. */ | |
350 | ||
351 | boolean | |
352 | _bfd_elf_make_section_from_shdr (abfd, hdr, name) | |
353 | bfd *abfd; | |
354 | Elf_Internal_Shdr *hdr; | |
355 | const char *name; | |
356 | { | |
357 | asection *newsect; | |
358 | flagword flags; | |
359 | struct elf_backend_data *bed; | |
360 | ||
361 | if (hdr->bfd_section != NULL) | |
362 | { | |
363 | BFD_ASSERT (strcmp (name, | |
364 | bfd_get_section_name (abfd, hdr->bfd_section)) == 0); | |
365 | return true; | |
366 | } | |
367 | ||
368 | newsect = bfd_make_section_anyway (abfd, name); | |
369 | if (newsect == NULL) | |
370 | return false; | |
371 | ||
372 | newsect->filepos = hdr->sh_offset; | |
373 | ||
374 | if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr) | |
375 | || ! bfd_set_section_size (abfd, newsect, hdr->sh_size) | |
376 | || ! bfd_set_section_alignment (abfd, newsect, | |
377 | bfd_log2 (hdr->sh_addralign))) | |
378 | return false; | |
379 | ||
380 | flags = SEC_NO_FLAGS; | |
381 | if (hdr->sh_type != SHT_NOBITS) | |
382 | flags |= SEC_HAS_CONTENTS; | |
383 | if ((hdr->sh_flags & SHF_ALLOC) != 0) | |
384 | { | |
385 | flags |= SEC_ALLOC; | |
386 | if (hdr->sh_type != SHT_NOBITS) | |
387 | flags |= SEC_LOAD; | |
388 | } | |
389 | if ((hdr->sh_flags & SHF_WRITE) == 0) | |
390 | flags |= SEC_READONLY; | |
391 | if ((hdr->sh_flags & SHF_EXECINSTR) != 0) | |
392 | flags |= SEC_CODE; | |
393 | else if ((flags & SEC_LOAD) != 0) | |
394 | flags |= SEC_DATA; | |
395 | if ((hdr->sh_flags & SHF_MERGE) != 0) | |
396 | { | |
397 | flags |= SEC_MERGE; | |
398 | newsect->entsize = hdr->sh_entsize; | |
399 | if ((hdr->sh_flags & SHF_STRINGS) != 0) | |
400 | flags |= SEC_STRINGS; | |
401 | } | |
402 | ||
403 | /* The debugging sections appear to be recognized only by name, not | |
404 | any sort of flag. */ | |
405 | { | |
406 | static const char *debug_sec_names [] = | |
407 | { | |
408 | ".debug", | |
409 | ".gnu.linkonce.wi.", | |
410 | ".line", | |
411 | ".stab" | |
412 | }; | |
413 | int i; | |
414 | ||
415 | for (i = sizeof (debug_sec_names) / sizeof (debug_sec_names[0]); i--;) | |
416 | if (strncmp (name, debug_sec_names[i], strlen (debug_sec_names[i])) == 0) | |
417 | break; | |
418 | ||
419 | if (i >= 0) | |
420 | flags |= SEC_DEBUGGING; | |
421 | } | |
422 | ||
423 | /* As a GNU extension, if the name begins with .gnu.linkonce, we | |
424 | only link a single copy of the section. This is used to support | |
425 | g++. g++ will emit each template expansion in its own section. | |
426 | The symbols will be defined as weak, so that multiple definitions | |
427 | are permitted. The GNU linker extension is to actually discard | |
428 | all but one of the sections. */ | |
429 | if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0) | |
430 | flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; | |
431 | ||
432 | bed = get_elf_backend_data (abfd); | |
433 | if (bed->elf_backend_section_flags) | |
434 | if (! bed->elf_backend_section_flags (&flags, hdr)) | |
435 | return false; | |
436 | ||
437 | if (! bfd_set_section_flags (abfd, newsect, flags)) | |
438 | return false; | |
439 | ||
440 | if ((flags & SEC_ALLOC) != 0) | |
441 | { | |
442 | Elf_Internal_Phdr *phdr; | |
443 | unsigned int i; | |
444 | ||
445 | /* Look through the phdrs to see if we need to adjust the lma. | |
446 | If all the p_paddr fields are zero, we ignore them, since | |
447 | some ELF linkers produce such output. */ | |
448 | phdr = elf_tdata (abfd)->phdr; | |
449 | for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) | |
450 | { | |
451 | if (phdr->p_paddr != 0) | |
452 | break; | |
453 | } | |
454 | if (i < elf_elfheader (abfd)->e_phnum) | |
455 | { | |
456 | phdr = elf_tdata (abfd)->phdr; | |
457 | for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) | |
458 | { | |
459 | if (phdr->p_type == PT_LOAD | |
460 | && phdr->p_vaddr != phdr->p_paddr | |
461 | && phdr->p_vaddr <= hdr->sh_addr | |
462 | && (phdr->p_vaddr + phdr->p_memsz | |
463 | >= hdr->sh_addr + hdr->sh_size) | |
464 | && ((flags & SEC_LOAD) == 0 | |
465 | || (phdr->p_offset <= (bfd_vma) hdr->sh_offset | |
466 | && (phdr->p_offset + phdr->p_filesz | |
467 | >= hdr->sh_offset + hdr->sh_size)))) | |
468 | { | |
469 | newsect->lma += phdr->p_paddr - phdr->p_vaddr; | |
470 | break; | |
471 | } | |
472 | } | |
473 | } | |
474 | } | |
475 | ||
476 | hdr->bfd_section = newsect; | |
477 | elf_section_data (newsect)->this_hdr = *hdr; | |
478 | ||
479 | return true; | |
480 | } | |
481 | ||
482 | /* | |
483 | INTERNAL_FUNCTION | |
484 | bfd_elf_find_section | |
485 | ||
486 | SYNOPSIS | |
487 | struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name); | |
488 | ||
489 | DESCRIPTION | |
490 | Helper functions for GDB to locate the string tables. | |
491 | Since BFD hides string tables from callers, GDB needs to use an | |
492 | internal hook to find them. Sun's .stabstr, in particular, | |
493 | isn't even pointed to by the .stab section, so ordinary | |
494 | mechanisms wouldn't work to find it, even if we had some. | |
495 | */ | |
496 | ||
497 | struct elf_internal_shdr * | |
498 | bfd_elf_find_section (abfd, name) | |
499 | bfd *abfd; | |
500 | char *name; | |
501 | { | |
502 | Elf_Internal_Shdr **i_shdrp; | |
503 | char *shstrtab; | |
504 | unsigned int max; | |
505 | unsigned int i; | |
506 | ||
507 | i_shdrp = elf_elfsections (abfd); | |
508 | if (i_shdrp != NULL) | |
509 | { | |
510 | shstrtab = bfd_elf_get_str_section | |
511 | (abfd, elf_elfheader (abfd)->e_shstrndx); | |
512 | if (shstrtab != NULL) | |
513 | { | |
514 | max = elf_elfheader (abfd)->e_shnum; | |
515 | for (i = 1; i < max; i++) | |
516 | if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name)) | |
517 | return i_shdrp[i]; | |
518 | } | |
519 | } | |
520 | return 0; | |
521 | } | |
522 | ||
523 | const char *const bfd_elf_section_type_names[] = { | |
524 | "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB", | |
525 | "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE", | |
526 | "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM", | |
527 | }; | |
528 | ||
529 | /* ELF relocs are against symbols. If we are producing relocateable | |
530 | output, and the reloc is against an external symbol, and nothing | |
531 | has given us any additional addend, the resulting reloc will also | |
532 | be against the same symbol. In such a case, we don't want to | |
533 | change anything about the way the reloc is handled, since it will | |
534 | all be done at final link time. Rather than put special case code | |
535 | into bfd_perform_relocation, all the reloc types use this howto | |
536 | function. It just short circuits the reloc if producing | |
537 | relocateable output against an external symbol. */ | |
538 | ||
539 | bfd_reloc_status_type | |
540 | bfd_elf_generic_reloc (abfd, | |
541 | reloc_entry, | |
542 | symbol, | |
543 | data, | |
544 | input_section, | |
545 | output_bfd, | |
546 | error_message) | |
547 | bfd *abfd ATTRIBUTE_UNUSED; | |
548 | arelent *reloc_entry; | |
549 | asymbol *symbol; | |
550 | PTR data ATTRIBUTE_UNUSED; | |
551 | asection *input_section; | |
552 | bfd *output_bfd; | |
553 | char **error_message ATTRIBUTE_UNUSED; | |
554 | { | |
555 | if (output_bfd != (bfd *) NULL | |
556 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
557 | && (! reloc_entry->howto->partial_inplace | |
558 | || reloc_entry->addend == 0)) | |
559 | { | |
560 | reloc_entry->address += input_section->output_offset; | |
561 | return bfd_reloc_ok; | |
562 | } | |
563 | ||
564 | return bfd_reloc_continue; | |
565 | } | |
566 | \f | |
567 | /* Finish SHF_MERGE section merging. */ | |
568 | ||
569 | boolean | |
570 | _bfd_elf_merge_sections (abfd, info) | |
571 | bfd *abfd; | |
572 | struct bfd_link_info *info; | |
573 | { | |
574 | if (elf_hash_table (info)->merge_info) | |
575 | _bfd_merge_sections (abfd, elf_hash_table (info)->merge_info); | |
576 | return true; | |
577 | } | |
578 | \f | |
579 | /* Print out the program headers. */ | |
580 | ||
581 | boolean | |
582 | _bfd_elf_print_private_bfd_data (abfd, farg) | |
583 | bfd *abfd; | |
584 | PTR farg; | |
585 | { | |
586 | FILE *f = (FILE *) farg; | |
587 | Elf_Internal_Phdr *p; | |
588 | asection *s; | |
589 | bfd_byte *dynbuf = NULL; | |
590 | ||
591 | p = elf_tdata (abfd)->phdr; | |
592 | if (p != NULL) | |
593 | { | |
594 | unsigned int i, c; | |
595 | ||
596 | fprintf (f, _("\nProgram Header:\n")); | |
597 | c = elf_elfheader (abfd)->e_phnum; | |
598 | for (i = 0; i < c; i++, p++) | |
599 | { | |
600 | const char *s; | |
601 | char buf[20]; | |
602 | ||
603 | switch (p->p_type) | |
604 | { | |
605 | case PT_NULL: s = "NULL"; break; | |
606 | case PT_LOAD: s = "LOAD"; break; | |
607 | case PT_DYNAMIC: s = "DYNAMIC"; break; | |
608 | case PT_INTERP: s = "INTERP"; break; | |
609 | case PT_NOTE: s = "NOTE"; break; | |
610 | case PT_SHLIB: s = "SHLIB"; break; | |
611 | case PT_PHDR: s = "PHDR"; break; | |
612 | default: sprintf (buf, "0x%lx", p->p_type); s = buf; break; | |
613 | } | |
614 | fprintf (f, "%8s off 0x", s); | |
615 | fprintf_vma (f, p->p_offset); | |
616 | fprintf (f, " vaddr 0x"); | |
617 | fprintf_vma (f, p->p_vaddr); | |
618 | fprintf (f, " paddr 0x"); | |
619 | fprintf_vma (f, p->p_paddr); | |
620 | fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align)); | |
621 | fprintf (f, " filesz 0x"); | |
622 | fprintf_vma (f, p->p_filesz); | |
623 | fprintf (f, " memsz 0x"); | |
624 | fprintf_vma (f, p->p_memsz); | |
625 | fprintf (f, " flags %c%c%c", | |
626 | (p->p_flags & PF_R) != 0 ? 'r' : '-', | |
627 | (p->p_flags & PF_W) != 0 ? 'w' : '-', | |
628 | (p->p_flags & PF_X) != 0 ? 'x' : '-'); | |
629 | if ((p->p_flags &~ (PF_R | PF_W | PF_X)) != 0) | |
630 | fprintf (f, " %lx", p->p_flags &~ (PF_R | PF_W | PF_X)); | |
631 | fprintf (f, "\n"); | |
632 | } | |
633 | } | |
634 | ||
635 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
636 | if (s != NULL) | |
637 | { | |
638 | int elfsec; | |
639 | unsigned long link; | |
640 | bfd_byte *extdyn, *extdynend; | |
641 | size_t extdynsize; | |
642 | void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *)); | |
643 | ||
644 | fprintf (f, _("\nDynamic Section:\n")); | |
645 | ||
646 | dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size); | |
647 | if (dynbuf == NULL) | |
648 | goto error_return; | |
649 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0, | |
650 | s->_raw_size)) | |
651 | goto error_return; | |
652 | ||
653 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
654 | if (elfsec == -1) | |
655 | goto error_return; | |
656 | link = elf_elfsections (abfd)[elfsec]->sh_link; | |
657 | ||
658 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; | |
659 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
660 | ||
661 | extdyn = dynbuf; | |
662 | extdynend = extdyn + s->_raw_size; | |
663 | for (; extdyn < extdynend; extdyn += extdynsize) | |
664 | { | |
665 | Elf_Internal_Dyn dyn; | |
666 | const char *name; | |
667 | char ab[20]; | |
668 | boolean stringp; | |
669 | ||
670 | (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn); | |
671 | ||
672 | if (dyn.d_tag == DT_NULL) | |
673 | break; | |
674 | ||
675 | stringp = false; | |
676 | switch (dyn.d_tag) | |
677 | { | |
678 | default: | |
679 | sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag); | |
680 | name = ab; | |
681 | break; | |
682 | ||
683 | case DT_NEEDED: name = "NEEDED"; stringp = true; break; | |
684 | case DT_PLTRELSZ: name = "PLTRELSZ"; break; | |
685 | case DT_PLTGOT: name = "PLTGOT"; break; | |
686 | case DT_HASH: name = "HASH"; break; | |
687 | case DT_STRTAB: name = "STRTAB"; break; | |
688 | case DT_SYMTAB: name = "SYMTAB"; break; | |
689 | case DT_RELA: name = "RELA"; break; | |
690 | case DT_RELASZ: name = "RELASZ"; break; | |
691 | case DT_RELAENT: name = "RELAENT"; break; | |
692 | case DT_STRSZ: name = "STRSZ"; break; | |
693 | case DT_SYMENT: name = "SYMENT"; break; | |
694 | case DT_INIT: name = "INIT"; break; | |
695 | case DT_FINI: name = "FINI"; break; | |
696 | case DT_SONAME: name = "SONAME"; stringp = true; break; | |
697 | case DT_RPATH: name = "RPATH"; stringp = true; break; | |
698 | case DT_SYMBOLIC: name = "SYMBOLIC"; break; | |
699 | case DT_REL: name = "REL"; break; | |
700 | case DT_RELSZ: name = "RELSZ"; break; | |
701 | case DT_RELENT: name = "RELENT"; break; | |
702 | case DT_PLTREL: name = "PLTREL"; break; | |
703 | case DT_DEBUG: name = "DEBUG"; break; | |
704 | case DT_TEXTREL: name = "TEXTREL"; break; | |
705 | case DT_JMPREL: name = "JMPREL"; break; | |
706 | case DT_BIND_NOW: name = "BIND_NOW"; break; | |
707 | case DT_INIT_ARRAY: name = "INIT_ARRAY"; break; | |
708 | case DT_FINI_ARRAY: name = "FINI_ARRAY"; break; | |
709 | case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break; | |
710 | case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break; | |
711 | case DT_RUNPATH: name = "RUNPATH"; stringp = true; break; | |
712 | case DT_FLAGS: name = "FLAGS"; break; | |
713 | case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break; | |
714 | case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break; | |
715 | case DT_CHECKSUM: name = "CHECKSUM"; break; | |
716 | case DT_PLTPADSZ: name = "PLTPADSZ"; break; | |
717 | case DT_MOVEENT: name = "MOVEENT"; break; | |
718 | case DT_MOVESZ: name = "MOVESZ"; break; | |
719 | case DT_FEATURE: name = "FEATURE"; break; | |
720 | case DT_POSFLAG_1: name = "POSFLAG_1"; break; | |
721 | case DT_SYMINSZ: name = "SYMINSZ"; break; | |
722 | case DT_SYMINENT: name = "SYMINENT"; break; | |
723 | case DT_CONFIG: name = "CONFIG"; stringp = true; break; | |
724 | case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = true; break; | |
725 | case DT_AUDIT: name = "AUDIT"; stringp = true; break; | |
726 | case DT_PLTPAD: name = "PLTPAD"; break; | |
727 | case DT_MOVETAB: name = "MOVETAB"; break; | |
728 | case DT_SYMINFO: name = "SYMINFO"; break; | |
729 | case DT_RELACOUNT: name = "RELACOUNT"; break; | |
730 | case DT_RELCOUNT: name = "RELCOUNT"; break; | |
731 | case DT_FLAGS_1: name = "FLAGS_1"; break; | |
732 | case DT_VERSYM: name = "VERSYM"; break; | |
733 | case DT_VERDEF: name = "VERDEF"; break; | |
734 | case DT_VERDEFNUM: name = "VERDEFNUM"; break; | |
735 | case DT_VERNEED: name = "VERNEED"; break; | |
736 | case DT_VERNEEDNUM: name = "VERNEEDNUM"; break; | |
737 | case DT_AUXILIARY: name = "AUXILIARY"; stringp = true; break; | |
738 | case DT_USED: name = "USED"; break; | |
739 | case DT_FILTER: name = "FILTER"; stringp = true; break; | |
740 | } | |
741 | ||
742 | fprintf (f, " %-11s ", name); | |
743 | if (! stringp) | |
744 | fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val); | |
745 | else | |
746 | { | |
747 | const char *string; | |
748 | ||
749 | string = bfd_elf_string_from_elf_section (abfd, link, | |
750 | dyn.d_un.d_val); | |
751 | if (string == NULL) | |
752 | goto error_return; | |
753 | fprintf (f, "%s", string); | |
754 | } | |
755 | fprintf (f, "\n"); | |
756 | } | |
757 | ||
758 | free (dynbuf); | |
759 | dynbuf = NULL; | |
760 | } | |
761 | ||
762 | if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL) | |
763 | || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL)) | |
764 | { | |
765 | if (! _bfd_elf_slurp_version_tables (abfd)) | |
766 | return false; | |
767 | } | |
768 | ||
769 | if (elf_dynverdef (abfd) != 0) | |
770 | { | |
771 | Elf_Internal_Verdef *t; | |
772 | ||
773 | fprintf (f, _("\nVersion definitions:\n")); | |
774 | for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef) | |
775 | { | |
776 | fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx, | |
777 | t->vd_flags, t->vd_hash, t->vd_nodename); | |
778 | if (t->vd_auxptr->vda_nextptr != NULL) | |
779 | { | |
780 | Elf_Internal_Verdaux *a; | |
781 | ||
782 | fprintf (f, "\t"); | |
783 | for (a = t->vd_auxptr->vda_nextptr; | |
784 | a != NULL; | |
785 | a = a->vda_nextptr) | |
786 | fprintf (f, "%s ", a->vda_nodename); | |
787 | fprintf (f, "\n"); | |
788 | } | |
789 | } | |
790 | } | |
791 | ||
792 | if (elf_dynverref (abfd) != 0) | |
793 | { | |
794 | Elf_Internal_Verneed *t; | |
795 | ||
796 | fprintf (f, _("\nVersion References:\n")); | |
797 | for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref) | |
798 | { | |
799 | Elf_Internal_Vernaux *a; | |
800 | ||
801 | fprintf (f, _(" required from %s:\n"), t->vn_filename); | |
802 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
803 | fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash, | |
804 | a->vna_flags, a->vna_other, a->vna_nodename); | |
805 | } | |
806 | } | |
807 | ||
808 | return true; | |
809 | ||
810 | error_return: | |
811 | if (dynbuf != NULL) | |
812 | free (dynbuf); | |
813 | return false; | |
814 | } | |
815 | ||
816 | /* Display ELF-specific fields of a symbol. */ | |
817 | ||
818 | void | |
819 | bfd_elf_print_symbol (abfd, filep, symbol, how) | |
820 | bfd *abfd; | |
821 | PTR filep; | |
822 | asymbol *symbol; | |
823 | bfd_print_symbol_type how; | |
824 | { | |
825 | FILE *file = (FILE *) filep; | |
826 | switch (how) | |
827 | { | |
828 | case bfd_print_symbol_name: | |
829 | fprintf (file, "%s", symbol->name); | |
830 | break; | |
831 | case bfd_print_symbol_more: | |
832 | fprintf (file, "elf "); | |
833 | fprintf_vma (file, symbol->value); | |
834 | fprintf (file, " %lx", (long) symbol->flags); | |
835 | break; | |
836 | case bfd_print_symbol_all: | |
837 | { | |
838 | const char *section_name; | |
839 | const char *name = NULL; | |
840 | struct elf_backend_data *bed; | |
841 | unsigned char st_other; | |
842 | ||
843 | section_name = symbol->section ? symbol->section->name : "(*none*)"; | |
844 | ||
845 | bed = get_elf_backend_data (abfd); | |
846 | if (bed->elf_backend_print_symbol_all) | |
847 | name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol); | |
848 | ||
849 | if (name == NULL) | |
850 | { | |
851 | name = symbol->name; | |
852 | bfd_print_symbol_vandf ((PTR) file, symbol); | |
853 | } | |
854 | ||
855 | fprintf (file, " %s\t", section_name); | |
856 | /* Print the "other" value for a symbol. For common symbols, | |
857 | we've already printed the size; now print the alignment. | |
858 | For other symbols, we have no specified alignment, and | |
859 | we've printed the address; now print the size. */ | |
860 | fprintf_vma (file, | |
861 | (bfd_is_com_section (symbol->section) | |
862 | ? ((elf_symbol_type *) symbol)->internal_elf_sym.st_value | |
863 | : ((elf_symbol_type *) symbol)->internal_elf_sym.st_size)); | |
864 | ||
865 | /* If we have version information, print it. */ | |
866 | if (elf_tdata (abfd)->dynversym_section != 0 | |
867 | && (elf_tdata (abfd)->dynverdef_section != 0 | |
868 | || elf_tdata (abfd)->dynverref_section != 0)) | |
869 | { | |
870 | unsigned int vernum; | |
871 | const char *version_string; | |
872 | ||
873 | vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION; | |
874 | ||
875 | if (vernum == 0) | |
876 | version_string = ""; | |
877 | else if (vernum == 1) | |
878 | version_string = "Base"; | |
879 | else if (vernum <= elf_tdata (abfd)->cverdefs) | |
880 | version_string = | |
881 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
882 | else | |
883 | { | |
884 | Elf_Internal_Verneed *t; | |
885 | ||
886 | version_string = ""; | |
887 | for (t = elf_tdata (abfd)->verref; | |
888 | t != NULL; | |
889 | t = t->vn_nextref) | |
890 | { | |
891 | Elf_Internal_Vernaux *a; | |
892 | ||
893 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
894 | { | |
895 | if (a->vna_other == vernum) | |
896 | { | |
897 | version_string = a->vna_nodename; | |
898 | break; | |
899 | } | |
900 | } | |
901 | } | |
902 | } | |
903 | ||
904 | if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0) | |
905 | fprintf (file, " %-11s", version_string); | |
906 | else | |
907 | { | |
908 | int i; | |
909 | ||
910 | fprintf (file, " (%s)", version_string); | |
911 | for (i = 10 - strlen (version_string); i > 0; --i) | |
912 | putc (' ', file); | |
913 | } | |
914 | } | |
915 | ||
916 | /* If the st_other field is not zero, print it. */ | |
917 | st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other; | |
918 | ||
919 | switch (st_other) | |
920 | { | |
921 | case 0: break; | |
922 | case STV_INTERNAL: fprintf (file, " .internal"); break; | |
923 | case STV_HIDDEN: fprintf (file, " .hidden"); break; | |
924 | case STV_PROTECTED: fprintf (file, " .protected"); break; | |
925 | default: | |
926 | /* Some other non-defined flags are also present, so print | |
927 | everything hex. */ | |
928 | fprintf (file, " 0x%02x", (unsigned int) st_other); | |
929 | } | |
930 | ||
931 | fprintf (file, " %s", name); | |
932 | } | |
933 | break; | |
934 | } | |
935 | } | |
936 | \f | |
937 | /* Create an entry in an ELF linker hash table. */ | |
938 | ||
939 | struct bfd_hash_entry * | |
940 | _bfd_elf_link_hash_newfunc (entry, table, string) | |
941 | struct bfd_hash_entry *entry; | |
942 | struct bfd_hash_table *table; | |
943 | const char *string; | |
944 | { | |
945 | struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; | |
946 | ||
947 | /* Allocate the structure if it has not already been allocated by a | |
948 | subclass. */ | |
949 | if (ret == (struct elf_link_hash_entry *) NULL) | |
950 | ret = ((struct elf_link_hash_entry *) | |
951 | bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry))); | |
952 | if (ret == (struct elf_link_hash_entry *) NULL) | |
953 | return (struct bfd_hash_entry *) ret; | |
954 | ||
955 | /* Call the allocation method of the superclass. */ | |
956 | ret = ((struct elf_link_hash_entry *) | |
957 | _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
958 | table, string)); | |
959 | if (ret != (struct elf_link_hash_entry *) NULL) | |
960 | { | |
961 | /* Set local fields. */ | |
962 | ret->indx = -1; | |
963 | ret->size = 0; | |
964 | ret->dynindx = -1; | |
965 | ret->dynstr_index = 0; | |
966 | ret->weakdef = NULL; | |
967 | ret->got.offset = (bfd_vma) -1; | |
968 | ret->plt.offset = (bfd_vma) -1; | |
969 | ret->linker_section_pointer = (elf_linker_section_pointers_t *)0; | |
970 | ret->verinfo.verdef = NULL; | |
971 | ret->vtable_entries_used = NULL; | |
972 | ret->vtable_entries_size = 0; | |
973 | ret->vtable_parent = NULL; | |
974 | ret->type = STT_NOTYPE; | |
975 | ret->other = 0; | |
976 | /* Assume that we have been called by a non-ELF symbol reader. | |
977 | This flag is then reset by the code which reads an ELF input | |
978 | file. This ensures that a symbol created by a non-ELF symbol | |
979 | reader will have the flag set correctly. */ | |
980 | ret->elf_link_hash_flags = ELF_LINK_NON_ELF; | |
981 | } | |
982 | ||
983 | return (struct bfd_hash_entry *) ret; | |
984 | } | |
985 | ||
986 | /* Copy data from an indirect symbol to its direct symbol, hiding the | |
987 | old indirect symbol. */ | |
988 | ||
989 | void | |
990 | _bfd_elf_link_hash_copy_indirect (dir, ind) | |
991 | struct elf_link_hash_entry *dir, *ind; | |
992 | { | |
993 | /* Copy down any references that we may have already seen to the | |
994 | symbol which just became indirect. */ | |
995 | ||
996 | dir->elf_link_hash_flags |= | |
997 | (ind->elf_link_hash_flags | |
998 | & (ELF_LINK_HASH_REF_DYNAMIC | |
999 | | ELF_LINK_HASH_REF_REGULAR | |
1000 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK | |
1001 | | ELF_LINK_NON_GOT_REF)); | |
1002 | ||
1003 | /* Copy over the global and procedure linkage table offset entries. | |
1004 | These may have been already set up by a check_relocs routine. */ | |
1005 | if (dir->got.offset == (bfd_vma) -1) | |
1006 | { | |
1007 | dir->got.offset = ind->got.offset; | |
1008 | ind->got.offset = (bfd_vma) -1; | |
1009 | } | |
1010 | BFD_ASSERT (ind->got.offset == (bfd_vma) -1); | |
1011 | ||
1012 | if (dir->plt.offset == (bfd_vma) -1) | |
1013 | { | |
1014 | dir->plt.offset = ind->plt.offset; | |
1015 | ind->plt.offset = (bfd_vma) -1; | |
1016 | } | |
1017 | BFD_ASSERT (ind->plt.offset == (bfd_vma) -1); | |
1018 | ||
1019 | if (dir->dynindx == -1) | |
1020 | { | |
1021 | dir->dynindx = ind->dynindx; | |
1022 | dir->dynstr_index = ind->dynstr_index; | |
1023 | ind->dynindx = -1; | |
1024 | ind->dynstr_index = 0; | |
1025 | } | |
1026 | BFD_ASSERT (ind->dynindx == -1); | |
1027 | } | |
1028 | ||
1029 | void | |
1030 | _bfd_elf_link_hash_hide_symbol (info, h) | |
1031 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
1032 | struct elf_link_hash_entry *h; | |
1033 | { | |
1034 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
1035 | h->plt.offset = (bfd_vma) -1; | |
1036 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
1037 | h->dynindx = -1; | |
1038 | } | |
1039 | ||
1040 | /* Initialize an ELF linker hash table. */ | |
1041 | ||
1042 | boolean | |
1043 | _bfd_elf_link_hash_table_init (table, abfd, newfunc) | |
1044 | struct elf_link_hash_table *table; | |
1045 | bfd *abfd; | |
1046 | struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, | |
1047 | struct bfd_hash_table *, | |
1048 | const char *)); | |
1049 | { | |
1050 | table->dynamic_sections_created = false; | |
1051 | table->dynobj = NULL; | |
1052 | /* The first dynamic symbol is a dummy. */ | |
1053 | table->dynsymcount = 1; | |
1054 | table->dynstr = NULL; | |
1055 | table->bucketcount = 0; | |
1056 | table->needed = NULL; | |
1057 | table->runpath = NULL; | |
1058 | table->hgot = NULL; | |
1059 | table->stab_info = NULL; | |
1060 | table->merge_info = NULL; | |
1061 | table->dynlocal = NULL; | |
1062 | return _bfd_link_hash_table_init (&table->root, abfd, newfunc); | |
1063 | } | |
1064 | ||
1065 | /* Create an ELF linker hash table. */ | |
1066 | ||
1067 | struct bfd_link_hash_table * | |
1068 | _bfd_elf_link_hash_table_create (abfd) | |
1069 | bfd *abfd; | |
1070 | { | |
1071 | struct elf_link_hash_table *ret; | |
1072 | ||
1073 | ret = ((struct elf_link_hash_table *) | |
1074 | bfd_alloc (abfd, sizeof (struct elf_link_hash_table))); | |
1075 | if (ret == (struct elf_link_hash_table *) NULL) | |
1076 | return NULL; | |
1077 | ||
1078 | if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc)) | |
1079 | { | |
1080 | bfd_release (abfd, ret); | |
1081 | return NULL; | |
1082 | } | |
1083 | ||
1084 | return &ret->root; | |
1085 | } | |
1086 | ||
1087 | /* This is a hook for the ELF emulation code in the generic linker to | |
1088 | tell the backend linker what file name to use for the DT_NEEDED | |
1089 | entry for a dynamic object. The generic linker passes name as an | |
1090 | empty string to indicate that no DT_NEEDED entry should be made. */ | |
1091 | ||
1092 | void | |
1093 | bfd_elf_set_dt_needed_name (abfd, name) | |
1094 | bfd *abfd; | |
1095 | const char *name; | |
1096 | { | |
1097 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
1098 | && bfd_get_format (abfd) == bfd_object) | |
1099 | elf_dt_name (abfd) = name; | |
1100 | } | |
1101 | ||
1102 | void | |
1103 | bfd_elf_set_dt_needed_soname (abfd, name) | |
1104 | bfd *abfd; | |
1105 | const char *name; | |
1106 | { | |
1107 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
1108 | && bfd_get_format (abfd) == bfd_object) | |
1109 | elf_dt_soname (abfd) = name; | |
1110 | } | |
1111 | ||
1112 | /* Get the list of DT_NEEDED entries for a link. This is a hook for | |
1113 | the linker ELF emulation code. */ | |
1114 | ||
1115 | struct bfd_link_needed_list * | |
1116 | bfd_elf_get_needed_list (abfd, info) | |
1117 | bfd *abfd ATTRIBUTE_UNUSED; | |
1118 | struct bfd_link_info *info; | |
1119 | { | |
1120 | if (info->hash->creator->flavour != bfd_target_elf_flavour) | |
1121 | return NULL; | |
1122 | return elf_hash_table (info)->needed; | |
1123 | } | |
1124 | ||
1125 | /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a | |
1126 | hook for the linker ELF emulation code. */ | |
1127 | ||
1128 | struct bfd_link_needed_list * | |
1129 | bfd_elf_get_runpath_list (abfd, info) | |
1130 | bfd *abfd ATTRIBUTE_UNUSED; | |
1131 | struct bfd_link_info *info; | |
1132 | { | |
1133 | if (info->hash->creator->flavour != bfd_target_elf_flavour) | |
1134 | return NULL; | |
1135 | return elf_hash_table (info)->runpath; | |
1136 | } | |
1137 | ||
1138 | /* Get the name actually used for a dynamic object for a link. This | |
1139 | is the SONAME entry if there is one. Otherwise, it is the string | |
1140 | passed to bfd_elf_set_dt_needed_name, or it is the filename. */ | |
1141 | ||
1142 | const char * | |
1143 | bfd_elf_get_dt_soname (abfd) | |
1144 | bfd *abfd; | |
1145 | { | |
1146 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
1147 | && bfd_get_format (abfd) == bfd_object) | |
1148 | return elf_dt_name (abfd); | |
1149 | return NULL; | |
1150 | } | |
1151 | ||
1152 | /* Get the list of DT_NEEDED entries from a BFD. This is a hook for | |
1153 | the ELF linker emulation code. */ | |
1154 | ||
1155 | boolean | |
1156 | bfd_elf_get_bfd_needed_list (abfd, pneeded) | |
1157 | bfd *abfd; | |
1158 | struct bfd_link_needed_list **pneeded; | |
1159 | { | |
1160 | asection *s; | |
1161 | bfd_byte *dynbuf = NULL; | |
1162 | int elfsec; | |
1163 | unsigned long link; | |
1164 | bfd_byte *extdyn, *extdynend; | |
1165 | size_t extdynsize; | |
1166 | void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *)); | |
1167 | ||
1168 | *pneeded = NULL; | |
1169 | ||
1170 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour | |
1171 | || bfd_get_format (abfd) != bfd_object) | |
1172 | return true; | |
1173 | ||
1174 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
1175 | if (s == NULL || s->_raw_size == 0) | |
1176 | return true; | |
1177 | ||
1178 | dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size); | |
1179 | if (dynbuf == NULL) | |
1180 | goto error_return; | |
1181 | ||
1182 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0, | |
1183 | s->_raw_size)) | |
1184 | goto error_return; | |
1185 | ||
1186 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
1187 | if (elfsec == -1) | |
1188 | goto error_return; | |
1189 | ||
1190 | link = elf_elfsections (abfd)[elfsec]->sh_link; | |
1191 | ||
1192 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; | |
1193 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
1194 | ||
1195 | extdyn = dynbuf; | |
1196 | extdynend = extdyn + s->_raw_size; | |
1197 | for (; extdyn < extdynend; extdyn += extdynsize) | |
1198 | { | |
1199 | Elf_Internal_Dyn dyn; | |
1200 | ||
1201 | (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn); | |
1202 | ||
1203 | if (dyn.d_tag == DT_NULL) | |
1204 | break; | |
1205 | ||
1206 | if (dyn.d_tag == DT_NEEDED) | |
1207 | { | |
1208 | const char *string; | |
1209 | struct bfd_link_needed_list *l; | |
1210 | ||
1211 | string = bfd_elf_string_from_elf_section (abfd, link, | |
1212 | dyn.d_un.d_val); | |
1213 | if (string == NULL) | |
1214 | goto error_return; | |
1215 | ||
1216 | l = (struct bfd_link_needed_list *) bfd_alloc (abfd, sizeof *l); | |
1217 | if (l == NULL) | |
1218 | goto error_return; | |
1219 | ||
1220 | l->by = abfd; | |
1221 | l->name = string; | |
1222 | l->next = *pneeded; | |
1223 | *pneeded = l; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | free (dynbuf); | |
1228 | ||
1229 | return true; | |
1230 | ||
1231 | error_return: | |
1232 | if (dynbuf != NULL) | |
1233 | free (dynbuf); | |
1234 | return false; | |
1235 | } | |
1236 | \f | |
1237 | /* Allocate an ELF string table--force the first byte to be zero. */ | |
1238 | ||
1239 | struct bfd_strtab_hash * | |
1240 | _bfd_elf_stringtab_init () | |
1241 | { | |
1242 | struct bfd_strtab_hash *ret; | |
1243 | ||
1244 | ret = _bfd_stringtab_init (); | |
1245 | if (ret != NULL) | |
1246 | { | |
1247 | bfd_size_type loc; | |
1248 | ||
1249 | loc = _bfd_stringtab_add (ret, "", true, false); | |
1250 | BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1); | |
1251 | if (loc == (bfd_size_type) -1) | |
1252 | { | |
1253 | _bfd_stringtab_free (ret); | |
1254 | ret = NULL; | |
1255 | } | |
1256 | } | |
1257 | return ret; | |
1258 | } | |
1259 | \f | |
1260 | /* ELF .o/exec file reading */ | |
1261 | ||
1262 | /* Create a new bfd section from an ELF section header. */ | |
1263 | ||
1264 | boolean | |
1265 | bfd_section_from_shdr (abfd, shindex) | |
1266 | bfd *abfd; | |
1267 | unsigned int shindex; | |
1268 | { | |
1269 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; | |
1270 | Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); | |
1271 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1272 | char *name; | |
1273 | ||
1274 | name = elf_string_from_elf_strtab (abfd, hdr->sh_name); | |
1275 | ||
1276 | switch (hdr->sh_type) | |
1277 | { | |
1278 | case SHT_NULL: | |
1279 | /* Inactive section. Throw it away. */ | |
1280 | return true; | |
1281 | ||
1282 | case SHT_PROGBITS: /* Normal section with contents. */ | |
1283 | case SHT_DYNAMIC: /* Dynamic linking information. */ | |
1284 | case SHT_NOBITS: /* .bss section. */ | |
1285 | case SHT_HASH: /* .hash section. */ | |
1286 | case SHT_NOTE: /* .note section. */ | |
1287 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
1288 | ||
1289 | case SHT_SYMTAB: /* A symbol table */ | |
1290 | if (elf_onesymtab (abfd) == shindex) | |
1291 | return true; | |
1292 | ||
1293 | BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym); | |
1294 | BFD_ASSERT (elf_onesymtab (abfd) == 0); | |
1295 | elf_onesymtab (abfd) = shindex; | |
1296 | elf_tdata (abfd)->symtab_hdr = *hdr; | |
1297 | elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr; | |
1298 | abfd->flags |= HAS_SYMS; | |
1299 | ||
1300 | /* Sometimes a shared object will map in the symbol table. If | |
1301 | SHF_ALLOC is set, and this is a shared object, then we also | |
1302 | treat this section as a BFD section. We can not base the | |
1303 | decision purely on SHF_ALLOC, because that flag is sometimes | |
1304 | set in a relocateable object file, which would confuse the | |
1305 | linker. */ | |
1306 | if ((hdr->sh_flags & SHF_ALLOC) != 0 | |
1307 | && (abfd->flags & DYNAMIC) != 0 | |
1308 | && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) | |
1309 | return false; | |
1310 | ||
1311 | return true; | |
1312 | ||
1313 | case SHT_DYNSYM: /* A dynamic symbol table */ | |
1314 | if (elf_dynsymtab (abfd) == shindex) | |
1315 | return true; | |
1316 | ||
1317 | BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym); | |
1318 | BFD_ASSERT (elf_dynsymtab (abfd) == 0); | |
1319 | elf_dynsymtab (abfd) = shindex; | |
1320 | elf_tdata (abfd)->dynsymtab_hdr = *hdr; | |
1321 | elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1322 | abfd->flags |= HAS_SYMS; | |
1323 | ||
1324 | /* Besides being a symbol table, we also treat this as a regular | |
1325 | section, so that objcopy can handle it. */ | |
1326 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
1327 | ||
1328 | case SHT_STRTAB: /* A string table */ | |
1329 | if (hdr->bfd_section != NULL) | |
1330 | return true; | |
1331 | if (ehdr->e_shstrndx == shindex) | |
1332 | { | |
1333 | elf_tdata (abfd)->shstrtab_hdr = *hdr; | |
1334 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr; | |
1335 | return true; | |
1336 | } | |
1337 | { | |
1338 | unsigned int i; | |
1339 | ||
1340 | for (i = 1; i < ehdr->e_shnum; i++) | |
1341 | { | |
1342 | Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i]; | |
1343 | if (hdr2->sh_link == shindex) | |
1344 | { | |
1345 | if (! bfd_section_from_shdr (abfd, i)) | |
1346 | return false; | |
1347 | if (elf_onesymtab (abfd) == i) | |
1348 | { | |
1349 | elf_tdata (abfd)->strtab_hdr = *hdr; | |
1350 | elf_elfsections (abfd)[shindex] = | |
1351 | &elf_tdata (abfd)->strtab_hdr; | |
1352 | return true; | |
1353 | } | |
1354 | if (elf_dynsymtab (abfd) == i) | |
1355 | { | |
1356 | elf_tdata (abfd)->dynstrtab_hdr = *hdr; | |
1357 | elf_elfsections (abfd)[shindex] = hdr = | |
1358 | &elf_tdata (abfd)->dynstrtab_hdr; | |
1359 | /* We also treat this as a regular section, so | |
1360 | that objcopy can handle it. */ | |
1361 | break; | |
1362 | } | |
1363 | #if 0 /* Not handling other string tables specially right now. */ | |
1364 | hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */ | |
1365 | /* We have a strtab for some random other section. */ | |
1366 | newsect = (asection *) hdr2->bfd_section; | |
1367 | if (!newsect) | |
1368 | break; | |
1369 | hdr->bfd_section = newsect; | |
1370 | hdr2 = &elf_section_data (newsect)->str_hdr; | |
1371 | *hdr2 = *hdr; | |
1372 | elf_elfsections (abfd)[shindex] = hdr2; | |
1373 | #endif | |
1374 | } | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
1379 | ||
1380 | case SHT_REL: | |
1381 | case SHT_RELA: | |
1382 | /* *These* do a lot of work -- but build no sections! */ | |
1383 | { | |
1384 | asection *target_sect; | |
1385 | Elf_Internal_Shdr *hdr2; | |
1386 | ||
1387 | /* Check for a bogus link to avoid crashing. */ | |
1388 | if (hdr->sh_link >= ehdr->e_shnum) | |
1389 | { | |
1390 | ((*_bfd_error_handler) | |
1391 | (_("%s: invalid link %lu for reloc section %s (index %u)"), | |
1392 | bfd_get_filename (abfd), hdr->sh_link, name, shindex)); | |
1393 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
1394 | } | |
1395 | ||
1396 | /* For some incomprehensible reason Oracle distributes | |
1397 | libraries for Solaris in which some of the objects have | |
1398 | bogus sh_link fields. It would be nice if we could just | |
1399 | reject them, but, unfortunately, some people need to use | |
1400 | them. We scan through the section headers; if we find only | |
1401 | one suitable symbol table, we clobber the sh_link to point | |
1402 | to it. I hope this doesn't break anything. */ | |
1403 | if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB | |
1404 | && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM) | |
1405 | { | |
1406 | int scan; | |
1407 | int found; | |
1408 | ||
1409 | found = 0; | |
1410 | for (scan = 1; scan < ehdr->e_shnum; scan++) | |
1411 | { | |
1412 | if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB | |
1413 | || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM) | |
1414 | { | |
1415 | if (found != 0) | |
1416 | { | |
1417 | found = 0; | |
1418 | break; | |
1419 | } | |
1420 | found = scan; | |
1421 | } | |
1422 | } | |
1423 | if (found != 0) | |
1424 | hdr->sh_link = found; | |
1425 | } | |
1426 | ||
1427 | /* Get the symbol table. */ | |
1428 | if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB | |
1429 | && ! bfd_section_from_shdr (abfd, hdr->sh_link)) | |
1430 | return false; | |
1431 | ||
1432 | /* If this reloc section does not use the main symbol table we | |
1433 | don't treat it as a reloc section. BFD can't adequately | |
1434 | represent such a section, so at least for now, we don't | |
1435 | try. We just present it as a normal section. We also | |
1436 | can't use it as a reloc section if it points to the null | |
1437 | section. */ | |
1438 | if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF) | |
1439 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
1440 | ||
1441 | if (! bfd_section_from_shdr (abfd, hdr->sh_info)) | |
1442 | return false; | |
1443 | target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info); | |
1444 | if (target_sect == NULL) | |
1445 | return false; | |
1446 | ||
1447 | if ((target_sect->flags & SEC_RELOC) == 0 | |
1448 | || target_sect->reloc_count == 0) | |
1449 | hdr2 = &elf_section_data (target_sect)->rel_hdr; | |
1450 | else | |
1451 | { | |
1452 | BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL); | |
1453 | hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2)); | |
1454 | elf_section_data (target_sect)->rel_hdr2 = hdr2; | |
1455 | } | |
1456 | *hdr2 = *hdr; | |
1457 | elf_elfsections (abfd)[shindex] = hdr2; | |
1458 | target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr); | |
1459 | target_sect->flags |= SEC_RELOC; | |
1460 | target_sect->relocation = NULL; | |
1461 | target_sect->rel_filepos = hdr->sh_offset; | |
1462 | /* In the section to which the relocations apply, mark whether | |
1463 | its relocations are of the REL or RELA variety. */ | |
1464 | if (hdr->sh_size != 0) | |
1465 | elf_section_data (target_sect)->use_rela_p | |
1466 | = (hdr->sh_type == SHT_RELA); | |
1467 | abfd->flags |= HAS_RELOC; | |
1468 | return true; | |
1469 | } | |
1470 | break; | |
1471 | ||
1472 | case SHT_GNU_verdef: | |
1473 | elf_dynverdef (abfd) = shindex; | |
1474 | elf_tdata (abfd)->dynverdef_hdr = *hdr; | |
1475 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
1476 | break; | |
1477 | ||
1478 | case SHT_GNU_versym: | |
1479 | elf_dynversym (abfd) = shindex; | |
1480 | elf_tdata (abfd)->dynversym_hdr = *hdr; | |
1481 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
1482 | break; | |
1483 | ||
1484 | case SHT_GNU_verneed: | |
1485 | elf_dynverref (abfd) = shindex; | |
1486 | elf_tdata (abfd)->dynverref_hdr = *hdr; | |
1487 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
1488 | break; | |
1489 | ||
1490 | case SHT_SHLIB: | |
1491 | return true; | |
1492 | ||
1493 | default: | |
1494 | /* Check for any processor-specific section types. */ | |
1495 | { | |
1496 | if (bed->elf_backend_section_from_shdr) | |
1497 | (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); | |
1498 | } | |
1499 | break; | |
1500 | } | |
1501 | ||
1502 | return true; | |
1503 | } | |
1504 | ||
1505 | /* Given an ELF section number, retrieve the corresponding BFD | |
1506 | section. */ | |
1507 | ||
1508 | asection * | |
1509 | bfd_section_from_elf_index (abfd, index) | |
1510 | bfd *abfd; | |
1511 | unsigned int index; | |
1512 | { | |
1513 | BFD_ASSERT (index > 0 && index < SHN_LORESERVE); | |
1514 | if (index >= elf_elfheader (abfd)->e_shnum) | |
1515 | return NULL; | |
1516 | return elf_elfsections (abfd)[index]->bfd_section; | |
1517 | } | |
1518 | ||
1519 | boolean | |
1520 | _bfd_elf_new_section_hook (abfd, sec) | |
1521 | bfd *abfd; | |
1522 | asection *sec; | |
1523 | { | |
1524 | struct bfd_elf_section_data *sdata; | |
1525 | ||
1526 | sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd, sizeof (*sdata)); | |
1527 | if (!sdata) | |
1528 | return false; | |
1529 | sec->used_by_bfd = (PTR) sdata; | |
1530 | ||
1531 | /* Indicate whether or not this section should use RELA relocations. */ | |
1532 | sdata->use_rela_p | |
1533 | = get_elf_backend_data (abfd)->default_use_rela_p; | |
1534 | ||
1535 | return true; | |
1536 | } | |
1537 | ||
1538 | /* Create a new bfd section from an ELF program header. | |
1539 | ||
1540 | Since program segments have no names, we generate a synthetic name | |
1541 | of the form segment<NUM>, where NUM is generally the index in the | |
1542 | program header table. For segments that are split (see below) we | |
1543 | generate the names segment<NUM>a and segment<NUM>b. | |
1544 | ||
1545 | Note that some program segments may have a file size that is different than | |
1546 | (less than) the memory size. All this means is that at execution the | |
1547 | system must allocate the amount of memory specified by the memory size, | |
1548 | but only initialize it with the first "file size" bytes read from the | |
1549 | file. This would occur for example, with program segments consisting | |
1550 | of combined data+bss. | |
1551 | ||
1552 | To handle the above situation, this routine generates TWO bfd sections | |
1553 | for the single program segment. The first has the length specified by | |
1554 | the file size of the segment, and the second has the length specified | |
1555 | by the difference between the two sizes. In effect, the segment is split | |
1556 | into it's initialized and uninitialized parts. | |
1557 | ||
1558 | */ | |
1559 | ||
1560 | boolean | |
1561 | _bfd_elf_make_section_from_phdr (abfd, hdr, index, typename) | |
1562 | bfd *abfd; | |
1563 | Elf_Internal_Phdr *hdr; | |
1564 | int index; | |
1565 | const char *typename; | |
1566 | { | |
1567 | asection *newsect; | |
1568 | char *name; | |
1569 | char namebuf[64]; | |
1570 | int split; | |
1571 | ||
1572 | split = ((hdr->p_memsz > 0) | |
1573 | && (hdr->p_filesz > 0) | |
1574 | && (hdr->p_memsz > hdr->p_filesz)); | |
1575 | sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : ""); | |
1576 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
1577 | if (!name) | |
1578 | return false; | |
1579 | strcpy (name, namebuf); | |
1580 | newsect = bfd_make_section (abfd, name); | |
1581 | if (newsect == NULL) | |
1582 | return false; | |
1583 | newsect->vma = hdr->p_vaddr; | |
1584 | newsect->lma = hdr->p_paddr; | |
1585 | newsect->_raw_size = hdr->p_filesz; | |
1586 | newsect->filepos = hdr->p_offset; | |
1587 | newsect->flags |= SEC_HAS_CONTENTS; | |
1588 | if (hdr->p_type == PT_LOAD) | |
1589 | { | |
1590 | newsect->flags |= SEC_ALLOC; | |
1591 | newsect->flags |= SEC_LOAD; | |
1592 | if (hdr->p_flags & PF_X) | |
1593 | { | |
1594 | /* FIXME: all we known is that it has execute PERMISSION, | |
1595 | may be data. */ | |
1596 | newsect->flags |= SEC_CODE; | |
1597 | } | |
1598 | } | |
1599 | if (!(hdr->p_flags & PF_W)) | |
1600 | { | |
1601 | newsect->flags |= SEC_READONLY; | |
1602 | } | |
1603 | ||
1604 | if (split) | |
1605 | { | |
1606 | sprintf (namebuf, "%s%db", typename, index); | |
1607 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
1608 | if (!name) | |
1609 | return false; | |
1610 | strcpy (name, namebuf); | |
1611 | newsect = bfd_make_section (abfd, name); | |
1612 | if (newsect == NULL) | |
1613 | return false; | |
1614 | newsect->vma = hdr->p_vaddr + hdr->p_filesz; | |
1615 | newsect->lma = hdr->p_paddr + hdr->p_filesz; | |
1616 | newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; | |
1617 | if (hdr->p_type == PT_LOAD) | |
1618 | { | |
1619 | newsect->flags |= SEC_ALLOC; | |
1620 | if (hdr->p_flags & PF_X) | |
1621 | newsect->flags |= SEC_CODE; | |
1622 | } | |
1623 | if (!(hdr->p_flags & PF_W)) | |
1624 | newsect->flags |= SEC_READONLY; | |
1625 | } | |
1626 | ||
1627 | return true; | |
1628 | } | |
1629 | ||
1630 | boolean | |
1631 | bfd_section_from_phdr (abfd, hdr, index) | |
1632 | bfd *abfd; | |
1633 | Elf_Internal_Phdr *hdr; | |
1634 | int index; | |
1635 | { | |
1636 | struct elf_backend_data *bed; | |
1637 | ||
1638 | switch (hdr->p_type) | |
1639 | { | |
1640 | case PT_NULL: | |
1641 | return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null"); | |
1642 | ||
1643 | case PT_LOAD: | |
1644 | return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load"); | |
1645 | ||
1646 | case PT_DYNAMIC: | |
1647 | return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic"); | |
1648 | ||
1649 | case PT_INTERP: | |
1650 | return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp"); | |
1651 | ||
1652 | case PT_NOTE: | |
1653 | if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note")) | |
1654 | return false; | |
1655 | if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz)) | |
1656 | return false; | |
1657 | return true; | |
1658 | ||
1659 | case PT_SHLIB: | |
1660 | return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib"); | |
1661 | ||
1662 | case PT_PHDR: | |
1663 | return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr"); | |
1664 | ||
1665 | default: | |
1666 | /* Check for any processor-specific program segment types. | |
1667 | If no handler for them, default to making "segment" sections. */ | |
1668 | bed = get_elf_backend_data (abfd); | |
1669 | if (bed->elf_backend_section_from_phdr) | |
1670 | return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index); | |
1671 | else | |
1672 | return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment"); | |
1673 | } | |
1674 | } | |
1675 | ||
1676 | /* Initialize REL_HDR, the section-header for new section, containing | |
1677 | relocations against ASECT. If USE_RELA_P is true, we use RELA | |
1678 | relocations; otherwise, we use REL relocations. */ | |
1679 | ||
1680 | boolean | |
1681 | _bfd_elf_init_reloc_shdr (abfd, rel_hdr, asect, use_rela_p) | |
1682 | bfd *abfd; | |
1683 | Elf_Internal_Shdr *rel_hdr; | |
1684 | asection *asect; | |
1685 | boolean use_rela_p; | |
1686 | { | |
1687 | char *name; | |
1688 | struct elf_backend_data *bed; | |
1689 | ||
1690 | bed = get_elf_backend_data (abfd); | |
1691 | name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name)); | |
1692 | if (name == NULL) | |
1693 | return false; | |
1694 | sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name); | |
1695 | rel_hdr->sh_name = | |
1696 | (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name, | |
1697 | true, false); | |
1698 | if (rel_hdr->sh_name == (unsigned int) -1) | |
1699 | return false; | |
1700 | rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; | |
1701 | rel_hdr->sh_entsize = (use_rela_p | |
1702 | ? bed->s->sizeof_rela | |
1703 | : bed->s->sizeof_rel); | |
1704 | rel_hdr->sh_addralign = bed->s->file_align; | |
1705 | rel_hdr->sh_flags = 0; | |
1706 | rel_hdr->sh_addr = 0; | |
1707 | rel_hdr->sh_size = 0; | |
1708 | rel_hdr->sh_offset = 0; | |
1709 | ||
1710 | return true; | |
1711 | } | |
1712 | ||
1713 | /* Set up an ELF internal section header for a section. */ | |
1714 | ||
1715 | static void | |
1716 | elf_fake_sections (abfd, asect, failedptrarg) | |
1717 | bfd *abfd; | |
1718 | asection *asect; | |
1719 | PTR failedptrarg; | |
1720 | { | |
1721 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1722 | boolean *failedptr = (boolean *) failedptrarg; | |
1723 | Elf_Internal_Shdr *this_hdr; | |
1724 | ||
1725 | if (*failedptr) | |
1726 | { | |
1727 | /* We already failed; just get out of the bfd_map_over_sections | |
1728 | loop. */ | |
1729 | return; | |
1730 | } | |
1731 | ||
1732 | this_hdr = &elf_section_data (asect)->this_hdr; | |
1733 | ||
1734 | this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd), | |
1735 | asect->name, | |
1736 | true, false); | |
1737 | if (this_hdr->sh_name == (unsigned long) -1) | |
1738 | { | |
1739 | *failedptr = true; | |
1740 | return; | |
1741 | } | |
1742 | ||
1743 | this_hdr->sh_flags = 0; | |
1744 | ||
1745 | if ((asect->flags & SEC_ALLOC) != 0 | |
1746 | || asect->user_set_vma) | |
1747 | this_hdr->sh_addr = asect->vma; | |
1748 | else | |
1749 | this_hdr->sh_addr = 0; | |
1750 | ||
1751 | this_hdr->sh_offset = 0; | |
1752 | this_hdr->sh_size = asect->_raw_size; | |
1753 | this_hdr->sh_link = 0; | |
1754 | this_hdr->sh_addralign = 1 << asect->alignment_power; | |
1755 | /* The sh_entsize and sh_info fields may have been set already by | |
1756 | copy_private_section_data. */ | |
1757 | ||
1758 | this_hdr->bfd_section = asect; | |
1759 | this_hdr->contents = NULL; | |
1760 | ||
1761 | /* FIXME: This should not be based on section names. */ | |
1762 | if (strcmp (asect->name, ".dynstr") == 0) | |
1763 | this_hdr->sh_type = SHT_STRTAB; | |
1764 | else if (strcmp (asect->name, ".hash") == 0) | |
1765 | { | |
1766 | this_hdr->sh_type = SHT_HASH; | |
1767 | this_hdr->sh_entsize = bed->s->sizeof_hash_entry; | |
1768 | } | |
1769 | else if (strcmp (asect->name, ".dynsym") == 0) | |
1770 | { | |
1771 | this_hdr->sh_type = SHT_DYNSYM; | |
1772 | this_hdr->sh_entsize = bed->s->sizeof_sym; | |
1773 | } | |
1774 | else if (strcmp (asect->name, ".dynamic") == 0) | |
1775 | { | |
1776 | this_hdr->sh_type = SHT_DYNAMIC; | |
1777 | this_hdr->sh_entsize = bed->s->sizeof_dyn; | |
1778 | } | |
1779 | else if (strncmp (asect->name, ".rela", 5) == 0 | |
1780 | && get_elf_backend_data (abfd)->may_use_rela_p) | |
1781 | { | |
1782 | this_hdr->sh_type = SHT_RELA; | |
1783 | this_hdr->sh_entsize = bed->s->sizeof_rela; | |
1784 | } | |
1785 | else if (strncmp (asect->name, ".rel", 4) == 0 | |
1786 | && get_elf_backend_data (abfd)->may_use_rel_p) | |
1787 | { | |
1788 | this_hdr->sh_type = SHT_REL; | |
1789 | this_hdr->sh_entsize = bed->s->sizeof_rel; | |
1790 | } | |
1791 | else if (strncmp (asect->name, ".note", 5) == 0) | |
1792 | this_hdr->sh_type = SHT_NOTE; | |
1793 | else if (strncmp (asect->name, ".stab", 5) == 0 | |
1794 | && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0) | |
1795 | this_hdr->sh_type = SHT_STRTAB; | |
1796 | else if (strcmp (asect->name, ".gnu.version") == 0) | |
1797 | { | |
1798 | this_hdr->sh_type = SHT_GNU_versym; | |
1799 | this_hdr->sh_entsize = sizeof (Elf_External_Versym); | |
1800 | } | |
1801 | else if (strcmp (asect->name, ".gnu.version_d") == 0) | |
1802 | { | |
1803 | this_hdr->sh_type = SHT_GNU_verdef; | |
1804 | this_hdr->sh_entsize = 0; | |
1805 | /* objcopy or strip will copy over sh_info, but may not set | |
1806 | cverdefs. The linker will set cverdefs, but sh_info will be | |
1807 | zero. */ | |
1808 | if (this_hdr->sh_info == 0) | |
1809 | this_hdr->sh_info = elf_tdata (abfd)->cverdefs; | |
1810 | else | |
1811 | BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0 | |
1812 | || this_hdr->sh_info == elf_tdata (abfd)->cverdefs); | |
1813 | } | |
1814 | else if (strcmp (asect->name, ".gnu.version_r") == 0) | |
1815 | { | |
1816 | this_hdr->sh_type = SHT_GNU_verneed; | |
1817 | this_hdr->sh_entsize = 0; | |
1818 | /* objcopy or strip will copy over sh_info, but may not set | |
1819 | cverrefs. The linker will set cverrefs, but sh_info will be | |
1820 | zero. */ | |
1821 | if (this_hdr->sh_info == 0) | |
1822 | this_hdr->sh_info = elf_tdata (abfd)->cverrefs; | |
1823 | else | |
1824 | BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0 | |
1825 | || this_hdr->sh_info == elf_tdata (abfd)->cverrefs); | |
1826 | } | |
1827 | else if ((asect->flags & SEC_ALLOC) != 0 | |
1828 | && ((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)) | |
1829 | this_hdr->sh_type = SHT_NOBITS; | |
1830 | else | |
1831 | this_hdr->sh_type = SHT_PROGBITS; | |
1832 | ||
1833 | if ((asect->flags & SEC_ALLOC) != 0) | |
1834 | this_hdr->sh_flags |= SHF_ALLOC; | |
1835 | if ((asect->flags & SEC_READONLY) == 0) | |
1836 | this_hdr->sh_flags |= SHF_WRITE; | |
1837 | if ((asect->flags & SEC_CODE) != 0) | |
1838 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
1839 | if ((asect->flags & SEC_MERGE) != 0) | |
1840 | { | |
1841 | this_hdr->sh_flags |= SHF_MERGE; | |
1842 | this_hdr->sh_entsize = asect->entsize; | |
1843 | if ((asect->flags & SEC_STRINGS) != 0) | |
1844 | this_hdr->sh_flags |= SHF_STRINGS; | |
1845 | } | |
1846 | ||
1847 | /* Check for processor-specific section types. */ | |
1848 | if (bed->elf_backend_fake_sections) | |
1849 | (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect); | |
1850 | ||
1851 | /* If the section has relocs, set up a section header for the | |
1852 | SHT_REL[A] section. If two relocation sections are required for | |
1853 | this section, it is up to the processor-specific back-end to | |
1854 | create the other. */ | |
1855 | if ((asect->flags & SEC_RELOC) != 0 | |
1856 | && !_bfd_elf_init_reloc_shdr (abfd, | |
1857 | &elf_section_data (asect)->rel_hdr, | |
1858 | asect, | |
1859 | elf_section_data (asect)->use_rela_p)) | |
1860 | *failedptr = true; | |
1861 | } | |
1862 | ||
1863 | /* Assign all ELF section numbers. The dummy first section is handled here | |
1864 | too. The link/info pointers for the standard section types are filled | |
1865 | in here too, while we're at it. */ | |
1866 | ||
1867 | static boolean | |
1868 | assign_section_numbers (abfd) | |
1869 | bfd *abfd; | |
1870 | { | |
1871 | struct elf_obj_tdata *t = elf_tdata (abfd); | |
1872 | asection *sec; | |
1873 | unsigned int section_number; | |
1874 | Elf_Internal_Shdr **i_shdrp; | |
1875 | ||
1876 | section_number = 1; | |
1877 | ||
1878 | for (sec = abfd->sections; sec; sec = sec->next) | |
1879 | { | |
1880 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1881 | ||
1882 | d->this_idx = section_number++; | |
1883 | if ((sec->flags & SEC_RELOC) == 0) | |
1884 | d->rel_idx = 0; | |
1885 | else | |
1886 | d->rel_idx = section_number++; | |
1887 | ||
1888 | if (d->rel_hdr2) | |
1889 | d->rel_idx2 = section_number++; | |
1890 | else | |
1891 | d->rel_idx2 = 0; | |
1892 | } | |
1893 | ||
1894 | t->shstrtab_section = section_number++; | |
1895 | elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section; | |
1896 | t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd)); | |
1897 | ||
1898 | if (bfd_get_symcount (abfd) > 0) | |
1899 | { | |
1900 | t->symtab_section = section_number++; | |
1901 | t->strtab_section = section_number++; | |
1902 | } | |
1903 | ||
1904 | elf_elfheader (abfd)->e_shnum = section_number; | |
1905 | ||
1906 | /* Set up the list of section header pointers, in agreement with the | |
1907 | indices. */ | |
1908 | i_shdrp = ((Elf_Internal_Shdr **) | |
1909 | bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *))); | |
1910 | if (i_shdrp == NULL) | |
1911 | return false; | |
1912 | ||
1913 | i_shdrp[0] = ((Elf_Internal_Shdr *) | |
1914 | bfd_alloc (abfd, sizeof (Elf_Internal_Shdr))); | |
1915 | if (i_shdrp[0] == NULL) | |
1916 | { | |
1917 | bfd_release (abfd, i_shdrp); | |
1918 | return false; | |
1919 | } | |
1920 | memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr)); | |
1921 | ||
1922 | elf_elfsections (abfd) = i_shdrp; | |
1923 | ||
1924 | i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; | |
1925 | if (bfd_get_symcount (abfd) > 0) | |
1926 | { | |
1927 | i_shdrp[t->symtab_section] = &t->symtab_hdr; | |
1928 | i_shdrp[t->strtab_section] = &t->strtab_hdr; | |
1929 | t->symtab_hdr.sh_link = t->strtab_section; | |
1930 | } | |
1931 | for (sec = abfd->sections; sec; sec = sec->next) | |
1932 | { | |
1933 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1934 | asection *s; | |
1935 | const char *name; | |
1936 | ||
1937 | i_shdrp[d->this_idx] = &d->this_hdr; | |
1938 | if (d->rel_idx != 0) | |
1939 | i_shdrp[d->rel_idx] = &d->rel_hdr; | |
1940 | if (d->rel_idx2 != 0) | |
1941 | i_shdrp[d->rel_idx2] = d->rel_hdr2; | |
1942 | ||
1943 | /* Fill in the sh_link and sh_info fields while we're at it. */ | |
1944 | ||
1945 | /* sh_link of a reloc section is the section index of the symbol | |
1946 | table. sh_info is the section index of the section to which | |
1947 | the relocation entries apply. */ | |
1948 | if (d->rel_idx != 0) | |
1949 | { | |
1950 | d->rel_hdr.sh_link = t->symtab_section; | |
1951 | d->rel_hdr.sh_info = d->this_idx; | |
1952 | } | |
1953 | if (d->rel_idx2 != 0) | |
1954 | { | |
1955 | d->rel_hdr2->sh_link = t->symtab_section; | |
1956 | d->rel_hdr2->sh_info = d->this_idx; | |
1957 | } | |
1958 | ||
1959 | switch (d->this_hdr.sh_type) | |
1960 | { | |
1961 | case SHT_REL: | |
1962 | case SHT_RELA: | |
1963 | /* A reloc section which we are treating as a normal BFD | |
1964 | section. sh_link is the section index of the symbol | |
1965 | table. sh_info is the section index of the section to | |
1966 | which the relocation entries apply. We assume that an | |
1967 | allocated reloc section uses the dynamic symbol table. | |
1968 | FIXME: How can we be sure? */ | |
1969 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
1970 | if (s != NULL) | |
1971 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1972 | ||
1973 | /* We look up the section the relocs apply to by name. */ | |
1974 | name = sec->name; | |
1975 | if (d->this_hdr.sh_type == SHT_REL) | |
1976 | name += 4; | |
1977 | else | |
1978 | name += 5; | |
1979 | s = bfd_get_section_by_name (abfd, name); | |
1980 | if (s != NULL) | |
1981 | d->this_hdr.sh_info = elf_section_data (s)->this_idx; | |
1982 | break; | |
1983 | ||
1984 | case SHT_STRTAB: | |
1985 | /* We assume that a section named .stab*str is a stabs | |
1986 | string section. We look for a section with the same name | |
1987 | but without the trailing ``str'', and set its sh_link | |
1988 | field to point to this section. */ | |
1989 | if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0 | |
1990 | && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0) | |
1991 | { | |
1992 | size_t len; | |
1993 | char *alc; | |
1994 | ||
1995 | len = strlen (sec->name); | |
1996 | alc = (char *) bfd_malloc (len - 2); | |
1997 | if (alc == NULL) | |
1998 | return false; | |
1999 | strncpy (alc, sec->name, len - 3); | |
2000 | alc[len - 3] = '\0'; | |
2001 | s = bfd_get_section_by_name (abfd, alc); | |
2002 | free (alc); | |
2003 | if (s != NULL) | |
2004 | { | |
2005 | elf_section_data (s)->this_hdr.sh_link = d->this_idx; | |
2006 | ||
2007 | /* This is a .stab section. */ | |
2008 | elf_section_data (s)->this_hdr.sh_entsize = | |
2009 | 4 + 2 * bfd_get_arch_size (abfd) / 8; | |
2010 | } | |
2011 | } | |
2012 | break; | |
2013 | ||
2014 | case SHT_DYNAMIC: | |
2015 | case SHT_DYNSYM: | |
2016 | case SHT_GNU_verneed: | |
2017 | case SHT_GNU_verdef: | |
2018 | /* sh_link is the section header index of the string table | |
2019 | used for the dynamic entries, or the symbol table, or the | |
2020 | version strings. */ | |
2021 | s = bfd_get_section_by_name (abfd, ".dynstr"); | |
2022 | if (s != NULL) | |
2023 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
2024 | break; | |
2025 | ||
2026 | case SHT_HASH: | |
2027 | case SHT_GNU_versym: | |
2028 | /* sh_link is the section header index of the symbol table | |
2029 | this hash table or version table is for. */ | |
2030 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
2031 | if (s != NULL) | |
2032 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
2033 | break; | |
2034 | } | |
2035 | } | |
2036 | ||
2037 | return true; | |
2038 | } | |
2039 | ||
2040 | /* Map symbol from it's internal number to the external number, moving | |
2041 | all local symbols to be at the head of the list. */ | |
2042 | ||
2043 | static INLINE int | |
2044 | sym_is_global (abfd, sym) | |
2045 | bfd *abfd; | |
2046 | asymbol *sym; | |
2047 | { | |
2048 | /* If the backend has a special mapping, use it. */ | |
2049 | if (get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
2050 | return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
2051 | (abfd, sym)); | |
2052 | ||
2053 | return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0 | |
2054 | || bfd_is_und_section (bfd_get_section (sym)) | |
2055 | || bfd_is_com_section (bfd_get_section (sym))); | |
2056 | } | |
2057 | ||
2058 | static boolean | |
2059 | elf_map_symbols (abfd) | |
2060 | bfd *abfd; | |
2061 | { | |
2062 | int symcount = bfd_get_symcount (abfd); | |
2063 | asymbol **syms = bfd_get_outsymbols (abfd); | |
2064 | asymbol **sect_syms; | |
2065 | int num_locals = 0; | |
2066 | int num_globals = 0; | |
2067 | int num_locals2 = 0; | |
2068 | int num_globals2 = 0; | |
2069 | int max_index = 0; | |
2070 | int num_sections = 0; | |
2071 | int idx; | |
2072 | asection *asect; | |
2073 | asymbol **new_syms; | |
2074 | asymbol *sym; | |
2075 | ||
2076 | #ifdef DEBUG | |
2077 | fprintf (stderr, "elf_map_symbols\n"); | |
2078 | fflush (stderr); | |
2079 | #endif | |
2080 | ||
2081 | /* Add a section symbol for each BFD section. FIXME: Is this really | |
2082 | necessary? */ | |
2083 | for (asect = abfd->sections; asect; asect = asect->next) | |
2084 | { | |
2085 | if (max_index < asect->index) | |
2086 | max_index = asect->index; | |
2087 | } | |
2088 | ||
2089 | max_index++; | |
2090 | sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *)); | |
2091 | if (sect_syms == NULL) | |
2092 | return false; | |
2093 | elf_section_syms (abfd) = sect_syms; | |
2094 | ||
2095 | for (idx = 0; idx < symcount; idx++) | |
2096 | { | |
2097 | sym = syms[idx]; | |
2098 | ||
2099 | if ((sym->flags & BSF_SECTION_SYM) != 0 | |
2100 | && sym->value == 0) | |
2101 | { | |
2102 | asection *sec; | |
2103 | ||
2104 | sec = sym->section; | |
2105 | ||
2106 | if (sec->owner != NULL) | |
2107 | { | |
2108 | if (sec->owner != abfd) | |
2109 | { | |
2110 | if (sec->output_offset != 0) | |
2111 | continue; | |
2112 | ||
2113 | sec = sec->output_section; | |
2114 | ||
2115 | /* Empty sections in the input files may have had a section | |
2116 | symbol created for them. (See the comment near the end of | |
2117 | _bfd_generic_link_output_symbols in linker.c). If the linker | |
2118 | script discards such sections then we will reach this point. | |
2119 | Since we know that we cannot avoid this case, we detect it | |
2120 | and skip the abort and the assignment to the sect_syms array. | |
2121 | To reproduce this particular case try running the linker | |
2122 | testsuite test ld-scripts/weak.exp for an ELF port that uses | |
2123 | the generic linker. */ | |
2124 | if (sec->owner == NULL) | |
2125 | continue; | |
2126 | ||
2127 | BFD_ASSERT (sec->owner == abfd); | |
2128 | } | |
2129 | sect_syms[sec->index] = syms[idx]; | |
2130 | } | |
2131 | } | |
2132 | } | |
2133 | ||
2134 | for (asect = abfd->sections; asect; asect = asect->next) | |
2135 | { | |
2136 | if (sect_syms[asect->index] != NULL) | |
2137 | continue; | |
2138 | ||
2139 | sym = bfd_make_empty_symbol (abfd); | |
2140 | if (sym == NULL) | |
2141 | return false; | |
2142 | sym->the_bfd = abfd; | |
2143 | sym->name = asect->name; | |
2144 | sym->value = 0; | |
2145 | /* Set the flags to 0 to indicate that this one was newly added. */ | |
2146 | sym->flags = 0; | |
2147 | sym->section = asect; | |
2148 | sect_syms[asect->index] = sym; | |
2149 | num_sections++; | |
2150 | #ifdef DEBUG | |
2151 | fprintf (stderr, | |
2152 | _("creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n"), | |
2153 | asect->name, (long) asect->vma, asect->index, (long) asect); | |
2154 | #endif | |
2155 | } | |
2156 | ||
2157 | /* Classify all of the symbols. */ | |
2158 | for (idx = 0; idx < symcount; idx++) | |
2159 | { | |
2160 | if (!sym_is_global (abfd, syms[idx])) | |
2161 | num_locals++; | |
2162 | else | |
2163 | num_globals++; | |
2164 | } | |
2165 | for (asect = abfd->sections; asect; asect = asect->next) | |
2166 | { | |
2167 | if (sect_syms[asect->index] != NULL | |
2168 | && sect_syms[asect->index]->flags == 0) | |
2169 | { | |
2170 | sect_syms[asect->index]->flags = BSF_SECTION_SYM; | |
2171 | if (!sym_is_global (abfd, sect_syms[asect->index])) | |
2172 | num_locals++; | |
2173 | else | |
2174 | num_globals++; | |
2175 | sect_syms[asect->index]->flags = 0; | |
2176 | } | |
2177 | } | |
2178 | ||
2179 | /* Now sort the symbols so the local symbols are first. */ | |
2180 | new_syms = ((asymbol **) | |
2181 | bfd_alloc (abfd, | |
2182 | (num_locals + num_globals) * sizeof (asymbol *))); | |
2183 | if (new_syms == NULL) | |
2184 | return false; | |
2185 | ||
2186 | for (idx = 0; idx < symcount; idx++) | |
2187 | { | |
2188 | asymbol *sym = syms[idx]; | |
2189 | int i; | |
2190 | ||
2191 | if (!sym_is_global (abfd, sym)) | |
2192 | i = num_locals2++; | |
2193 | else | |
2194 | i = num_locals + num_globals2++; | |
2195 | new_syms[i] = sym; | |
2196 | sym->udata.i = i + 1; | |
2197 | } | |
2198 | for (asect = abfd->sections; asect; asect = asect->next) | |
2199 | { | |
2200 | if (sect_syms[asect->index] != NULL | |
2201 | && sect_syms[asect->index]->flags == 0) | |
2202 | { | |
2203 | asymbol *sym = sect_syms[asect->index]; | |
2204 | int i; | |
2205 | ||
2206 | sym->flags = BSF_SECTION_SYM; | |
2207 | if (!sym_is_global (abfd, sym)) | |
2208 | i = num_locals2++; | |
2209 | else | |
2210 | i = num_locals + num_globals2++; | |
2211 | new_syms[i] = sym; | |
2212 | sym->udata.i = i + 1; | |
2213 | } | |
2214 | } | |
2215 | ||
2216 | bfd_set_symtab (abfd, new_syms, num_locals + num_globals); | |
2217 | ||
2218 | elf_num_locals (abfd) = num_locals; | |
2219 | elf_num_globals (abfd) = num_globals; | |
2220 | return true; | |
2221 | } | |
2222 | ||
2223 | /* Align to the maximum file alignment that could be required for any | |
2224 | ELF data structure. */ | |
2225 | ||
2226 | static INLINE file_ptr align_file_position PARAMS ((file_ptr, int)); | |
2227 | static INLINE file_ptr | |
2228 | align_file_position (off, align) | |
2229 | file_ptr off; | |
2230 | int align; | |
2231 | { | |
2232 | return (off + align - 1) & ~(align - 1); | |
2233 | } | |
2234 | ||
2235 | /* Assign a file position to a section, optionally aligning to the | |
2236 | required section alignment. */ | |
2237 | ||
2238 | INLINE file_ptr | |
2239 | _bfd_elf_assign_file_position_for_section (i_shdrp, offset, align) | |
2240 | Elf_Internal_Shdr *i_shdrp; | |
2241 | file_ptr offset; | |
2242 | boolean align; | |
2243 | { | |
2244 | if (align) | |
2245 | { | |
2246 | unsigned int al; | |
2247 | ||
2248 | al = i_shdrp->sh_addralign; | |
2249 | if (al > 1) | |
2250 | offset = BFD_ALIGN (offset, al); | |
2251 | } | |
2252 | i_shdrp->sh_offset = offset; | |
2253 | if (i_shdrp->bfd_section != NULL) | |
2254 | i_shdrp->bfd_section->filepos = offset; | |
2255 | if (i_shdrp->sh_type != SHT_NOBITS) | |
2256 | offset += i_shdrp->sh_size; | |
2257 | return offset; | |
2258 | } | |
2259 | ||
2260 | /* Compute the file positions we are going to put the sections at, and | |
2261 | otherwise prepare to begin writing out the ELF file. If LINK_INFO | |
2262 | is not NULL, this is being called by the ELF backend linker. */ | |
2263 | ||
2264 | boolean | |
2265 | _bfd_elf_compute_section_file_positions (abfd, link_info) | |
2266 | bfd *abfd; | |
2267 | struct bfd_link_info *link_info; | |
2268 | { | |
2269 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2270 | boolean failed; | |
2271 | struct bfd_strtab_hash *strtab; | |
2272 | Elf_Internal_Shdr *shstrtab_hdr; | |
2273 | ||
2274 | if (abfd->output_has_begun) | |
2275 | return true; | |
2276 | ||
2277 | /* Do any elf backend specific processing first. */ | |
2278 | if (bed->elf_backend_begin_write_processing) | |
2279 | (*bed->elf_backend_begin_write_processing) (abfd, link_info); | |
2280 | ||
2281 | if (! prep_headers (abfd)) | |
2282 | return false; | |
2283 | ||
2284 | /* Post process the headers if necessary. */ | |
2285 | if (bed->elf_backend_post_process_headers) | |
2286 | (*bed->elf_backend_post_process_headers) (abfd, link_info); | |
2287 | ||
2288 | failed = false; | |
2289 | bfd_map_over_sections (abfd, elf_fake_sections, &failed); | |
2290 | if (failed) | |
2291 | return false; | |
2292 | ||
2293 | if (!assign_section_numbers (abfd)) | |
2294 | return false; | |
2295 | ||
2296 | /* The backend linker builds symbol table information itself. */ | |
2297 | if (link_info == NULL && bfd_get_symcount (abfd) > 0) | |
2298 | { | |
2299 | /* Non-zero if doing a relocatable link. */ | |
2300 | int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC)); | |
2301 | ||
2302 | if (! swap_out_syms (abfd, &strtab, relocatable_p)) | |
2303 | return false; | |
2304 | } | |
2305 | ||
2306 | shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr; | |
2307 | /* sh_name was set in prep_headers. */ | |
2308 | shstrtab_hdr->sh_type = SHT_STRTAB; | |
2309 | shstrtab_hdr->sh_flags = 0; | |
2310 | shstrtab_hdr->sh_addr = 0; | |
2311 | shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd)); | |
2312 | shstrtab_hdr->sh_entsize = 0; | |
2313 | shstrtab_hdr->sh_link = 0; | |
2314 | shstrtab_hdr->sh_info = 0; | |
2315 | /* sh_offset is set in assign_file_positions_except_relocs. */ | |
2316 | shstrtab_hdr->sh_addralign = 1; | |
2317 | ||
2318 | if (!assign_file_positions_except_relocs (abfd)) | |
2319 | return false; | |
2320 | ||
2321 | if (link_info == NULL && bfd_get_symcount (abfd) > 0) | |
2322 | { | |
2323 | file_ptr off; | |
2324 | Elf_Internal_Shdr *hdr; | |
2325 | ||
2326 | off = elf_tdata (abfd)->next_file_pos; | |
2327 | ||
2328 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
2329 | off = _bfd_elf_assign_file_position_for_section (hdr, off, true); | |
2330 | ||
2331 | hdr = &elf_tdata (abfd)->strtab_hdr; | |
2332 | off = _bfd_elf_assign_file_position_for_section (hdr, off, true); | |
2333 | ||
2334 | elf_tdata (abfd)->next_file_pos = off; | |
2335 | ||
2336 | /* Now that we know where the .strtab section goes, write it | |
2337 | out. */ | |
2338 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0 | |
2339 | || ! _bfd_stringtab_emit (abfd, strtab)) | |
2340 | return false; | |
2341 | _bfd_stringtab_free (strtab); | |
2342 | } | |
2343 | ||
2344 | abfd->output_has_begun = true; | |
2345 | ||
2346 | return true; | |
2347 | } | |
2348 | ||
2349 | /* Create a mapping from a set of sections to a program segment. */ | |
2350 | ||
2351 | static INLINE struct elf_segment_map * | |
2352 | make_mapping (abfd, sections, from, to, phdr) | |
2353 | bfd *abfd; | |
2354 | asection **sections; | |
2355 | unsigned int from; | |
2356 | unsigned int to; | |
2357 | boolean phdr; | |
2358 | { | |
2359 | struct elf_segment_map *m; | |
2360 | unsigned int i; | |
2361 | asection **hdrpp; | |
2362 | ||
2363 | m = ((struct elf_segment_map *) | |
2364 | bfd_zalloc (abfd, | |
2365 | (sizeof (struct elf_segment_map) | |
2366 | + (to - from - 1) * sizeof (asection *)))); | |
2367 | if (m == NULL) | |
2368 | return NULL; | |
2369 | m->next = NULL; | |
2370 | m->p_type = PT_LOAD; | |
2371 | for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++) | |
2372 | m->sections[i - from] = *hdrpp; | |
2373 | m->count = to - from; | |
2374 | ||
2375 | if (from == 0 && phdr) | |
2376 | { | |
2377 | /* Include the headers in the first PT_LOAD segment. */ | |
2378 | m->includes_filehdr = 1; | |
2379 | m->includes_phdrs = 1; | |
2380 | } | |
2381 | ||
2382 | return m; | |
2383 | } | |
2384 | ||
2385 | /* Set up a mapping from BFD sections to program segments. */ | |
2386 | ||
2387 | static boolean | |
2388 | map_sections_to_segments (abfd) | |
2389 | bfd *abfd; | |
2390 | { | |
2391 | asection **sections = NULL; | |
2392 | asection *s; | |
2393 | unsigned int i; | |
2394 | unsigned int count; | |
2395 | struct elf_segment_map *mfirst; | |
2396 | struct elf_segment_map **pm; | |
2397 | struct elf_segment_map *m; | |
2398 | asection *last_hdr; | |
2399 | unsigned int phdr_index; | |
2400 | bfd_vma maxpagesize; | |
2401 | asection **hdrpp; | |
2402 | boolean phdr_in_segment = true; | |
2403 | boolean writable; | |
2404 | asection *dynsec; | |
2405 | ||
2406 | if (elf_tdata (abfd)->segment_map != NULL) | |
2407 | return true; | |
2408 | ||
2409 | if (bfd_count_sections (abfd) == 0) | |
2410 | return true; | |
2411 | ||
2412 | /* Select the allocated sections, and sort them. */ | |
2413 | ||
2414 | sections = (asection **) bfd_malloc (bfd_count_sections (abfd) | |
2415 | * sizeof (asection *)); | |
2416 | if (sections == NULL) | |
2417 | goto error_return; | |
2418 | ||
2419 | i = 0; | |
2420 | for (s = abfd->sections; s != NULL; s = s->next) | |
2421 | { | |
2422 | if ((s->flags & SEC_ALLOC) != 0) | |
2423 | { | |
2424 | sections[i] = s; | |
2425 | ++i; | |
2426 | } | |
2427 | } | |
2428 | BFD_ASSERT (i <= bfd_count_sections (abfd)); | |
2429 | count = i; | |
2430 | ||
2431 | qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections); | |
2432 | ||
2433 | /* Build the mapping. */ | |
2434 | ||
2435 | mfirst = NULL; | |
2436 | pm = &mfirst; | |
2437 | ||
2438 | /* If we have a .interp section, then create a PT_PHDR segment for | |
2439 | the program headers and a PT_INTERP segment for the .interp | |
2440 | section. */ | |
2441 | s = bfd_get_section_by_name (abfd, ".interp"); | |
2442 | if (s != NULL && (s->flags & SEC_LOAD) != 0) | |
2443 | { | |
2444 | m = ((struct elf_segment_map *) | |
2445 | bfd_zalloc (abfd, sizeof (struct elf_segment_map))); | |
2446 | if (m == NULL) | |
2447 | goto error_return; | |
2448 | m->next = NULL; | |
2449 | m->p_type = PT_PHDR; | |
2450 | /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */ | |
2451 | m->p_flags = PF_R | PF_X; | |
2452 | m->p_flags_valid = 1; | |
2453 | m->includes_phdrs = 1; | |
2454 | ||
2455 | *pm = m; | |
2456 | pm = &m->next; | |
2457 | ||
2458 | m = ((struct elf_segment_map *) | |
2459 | bfd_zalloc (abfd, sizeof (struct elf_segment_map))); | |
2460 | if (m == NULL) | |
2461 | goto error_return; | |
2462 | m->next = NULL; | |
2463 | m->p_type = PT_INTERP; | |
2464 | m->count = 1; | |
2465 | m->sections[0] = s; | |
2466 | ||
2467 | *pm = m; | |
2468 | pm = &m->next; | |
2469 | } | |
2470 | ||
2471 | /* Look through the sections. We put sections in the same program | |
2472 | segment when the start of the second section can be placed within | |
2473 | a few bytes of the end of the first section. */ | |
2474 | last_hdr = NULL; | |
2475 | phdr_index = 0; | |
2476 | maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
2477 | writable = false; | |
2478 | dynsec = bfd_get_section_by_name (abfd, ".dynamic"); | |
2479 | if (dynsec != NULL | |
2480 | && (dynsec->flags & SEC_LOAD) == 0) | |
2481 | dynsec = NULL; | |
2482 | ||
2483 | /* Deal with -Ttext or something similar such that the first section | |
2484 | is not adjacent to the program headers. This is an | |
2485 | approximation, since at this point we don't know exactly how many | |
2486 | program headers we will need. */ | |
2487 | if (count > 0) | |
2488 | { | |
2489 | bfd_size_type phdr_size; | |
2490 | ||
2491 | phdr_size = elf_tdata (abfd)->program_header_size; | |
2492 | if (phdr_size == 0) | |
2493 | phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr; | |
2494 | if ((abfd->flags & D_PAGED) == 0 | |
2495 | || sections[0]->lma < phdr_size | |
2496 | || sections[0]->lma % maxpagesize < phdr_size % maxpagesize) | |
2497 | phdr_in_segment = false; | |
2498 | } | |
2499 | ||
2500 | for (i = 0, hdrpp = sections; i < count; i++, hdrpp++) | |
2501 | { | |
2502 | asection *hdr; | |
2503 | boolean new_segment; | |
2504 | ||
2505 | hdr = *hdrpp; | |
2506 | ||
2507 | /* See if this section and the last one will fit in the same | |
2508 | segment. */ | |
2509 | ||
2510 | if (last_hdr == NULL) | |
2511 | { | |
2512 | /* If we don't have a segment yet, then we don't need a new | |
2513 | one (we build the last one after this loop). */ | |
2514 | new_segment = false; | |
2515 | } | |
2516 | else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma) | |
2517 | { | |
2518 | /* If this section has a different relation between the | |
2519 | virtual address and the load address, then we need a new | |
2520 | segment. */ | |
2521 | new_segment = true; | |
2522 | } | |
2523 | else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize) | |
2524 | < BFD_ALIGN (hdr->lma, maxpagesize)) | |
2525 | { | |
2526 | /* If putting this section in this segment would force us to | |
2527 | skip a page in the segment, then we need a new segment. */ | |
2528 | new_segment = true; | |
2529 | } | |
2530 | else if ((last_hdr->flags & SEC_LOAD) == 0 | |
2531 | && (hdr->flags & SEC_LOAD) != 0) | |
2532 | { | |
2533 | /* We don't want to put a loadable section after a | |
2534 | nonloadable section in the same segment. */ | |
2535 | new_segment = true; | |
2536 | } | |
2537 | else if ((abfd->flags & D_PAGED) == 0) | |
2538 | { | |
2539 | /* If the file is not demand paged, which means that we | |
2540 | don't require the sections to be correctly aligned in the | |
2541 | file, then there is no other reason for a new segment. */ | |
2542 | new_segment = false; | |
2543 | } | |
2544 | else if (! writable | |
2545 | && (hdr->flags & SEC_READONLY) == 0 | |
2546 | && (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize) | |
2547 | == hdr->lma)) | |
2548 | { | |
2549 | /* We don't want to put a writable section in a read only | |
2550 | segment, unless they are on the same page in memory | |
2551 | anyhow. We already know that the last section does not | |
2552 | bring us past the current section on the page, so the | |
2553 | only case in which the new section is not on the same | |
2554 | page as the previous section is when the previous section | |
2555 | ends precisely on a page boundary. */ | |
2556 | new_segment = true; | |
2557 | } | |
2558 | else | |
2559 | { | |
2560 | /* Otherwise, we can use the same segment. */ | |
2561 | new_segment = false; | |
2562 | } | |
2563 | ||
2564 | if (! new_segment) | |
2565 | { | |
2566 | if ((hdr->flags & SEC_READONLY) == 0) | |
2567 | writable = true; | |
2568 | last_hdr = hdr; | |
2569 | continue; | |
2570 | } | |
2571 | ||
2572 | /* We need a new program segment. We must create a new program | |
2573 | header holding all the sections from phdr_index until hdr. */ | |
2574 | ||
2575 | m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment); | |
2576 | if (m == NULL) | |
2577 | goto error_return; | |
2578 | ||
2579 | *pm = m; | |
2580 | pm = &m->next; | |
2581 | ||
2582 | if ((hdr->flags & SEC_READONLY) == 0) | |
2583 | writable = true; | |
2584 | else | |
2585 | writable = false; | |
2586 | ||
2587 | last_hdr = hdr; | |
2588 | phdr_index = i; | |
2589 | phdr_in_segment = false; | |
2590 | } | |
2591 | ||
2592 | /* Create a final PT_LOAD program segment. */ | |
2593 | if (last_hdr != NULL) | |
2594 | { | |
2595 | m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment); | |
2596 | if (m == NULL) | |
2597 | goto error_return; | |
2598 | ||
2599 | *pm = m; | |
2600 | pm = &m->next; | |
2601 | } | |
2602 | ||
2603 | /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */ | |
2604 | if (dynsec != NULL) | |
2605 | { | |
2606 | m = ((struct elf_segment_map *) | |
2607 | bfd_zalloc (abfd, sizeof (struct elf_segment_map))); | |
2608 | if (m == NULL) | |
2609 | goto error_return; | |
2610 | m->next = NULL; | |
2611 | m->p_type = PT_DYNAMIC; | |
2612 | m->count = 1; | |
2613 | m->sections[0] = dynsec; | |
2614 | ||
2615 | *pm = m; | |
2616 | pm = &m->next; | |
2617 | } | |
2618 | ||
2619 | /* For each loadable .note section, add a PT_NOTE segment. We don't | |
2620 | use bfd_get_section_by_name, because if we link together | |
2621 | nonloadable .note sections and loadable .note sections, we will | |
2622 | generate two .note sections in the output file. FIXME: Using | |
2623 | names for section types is bogus anyhow. */ | |
2624 | for (s = abfd->sections; s != NULL; s = s->next) | |
2625 | { | |
2626 | if ((s->flags & SEC_LOAD) != 0 | |
2627 | && strncmp (s->name, ".note", 5) == 0) | |
2628 | { | |
2629 | m = ((struct elf_segment_map *) | |
2630 | bfd_zalloc (abfd, sizeof (struct elf_segment_map))); | |
2631 | if (m == NULL) | |
2632 | goto error_return; | |
2633 | m->next = NULL; | |
2634 | m->p_type = PT_NOTE; | |
2635 | m->count = 1; | |
2636 | m->sections[0] = s; | |
2637 | ||
2638 | *pm = m; | |
2639 | pm = &m->next; | |
2640 | } | |
2641 | } | |
2642 | ||
2643 | free (sections); | |
2644 | sections = NULL; | |
2645 | ||
2646 | elf_tdata (abfd)->segment_map = mfirst; | |
2647 | return true; | |
2648 | ||
2649 | error_return: | |
2650 | if (sections != NULL) | |
2651 | free (sections); | |
2652 | return false; | |
2653 | } | |
2654 | ||
2655 | /* Sort sections by address. */ | |
2656 | ||
2657 | static int | |
2658 | elf_sort_sections (arg1, arg2) | |
2659 | const PTR arg1; | |
2660 | const PTR arg2; | |
2661 | { | |
2662 | const asection *sec1 = *(const asection **) arg1; | |
2663 | const asection *sec2 = *(const asection **) arg2; | |
2664 | ||
2665 | /* Sort by LMA first, since this is the address used to | |
2666 | place the section into a segment. */ | |
2667 | if (sec1->lma < sec2->lma) | |
2668 | return -1; | |
2669 | else if (sec1->lma > sec2->lma) | |
2670 | return 1; | |
2671 | ||
2672 | /* Then sort by VMA. Normally the LMA and the VMA will be | |
2673 | the same, and this will do nothing. */ | |
2674 | if (sec1->vma < sec2->vma) | |
2675 | return -1; | |
2676 | else if (sec1->vma > sec2->vma) | |
2677 | return 1; | |
2678 | ||
2679 | /* Put !SEC_LOAD sections after SEC_LOAD ones. */ | |
2680 | ||
2681 | #define TOEND(x) (((x)->flags & SEC_LOAD) == 0) | |
2682 | ||
2683 | if (TOEND (sec1)) | |
2684 | { | |
2685 | if (TOEND (sec2)) | |
2686 | { | |
2687 | /* If the indicies are the same, do not return 0 | |
2688 | here, but continue to try the next comparison. */ | |
2689 | if (sec1->target_index - sec2->target_index != 0) | |
2690 | return sec1->target_index - sec2->target_index; | |
2691 | } | |
2692 | else | |
2693 | return 1; | |
2694 | } | |
2695 | else if (TOEND (sec2)) | |
2696 | return -1; | |
2697 | ||
2698 | #undef TOEND | |
2699 | ||
2700 | /* Sort by size, to put zero sized sections | |
2701 | before others at the same address. */ | |
2702 | ||
2703 | if (sec1->_raw_size < sec2->_raw_size) | |
2704 | return -1; | |
2705 | if (sec1->_raw_size > sec2->_raw_size) | |
2706 | return 1; | |
2707 | ||
2708 | return sec1->target_index - sec2->target_index; | |
2709 | } | |
2710 | ||
2711 | /* Assign file positions to the sections based on the mapping from | |
2712 | sections to segments. This function also sets up some fields in | |
2713 | the file header, and writes out the program headers. */ | |
2714 | ||
2715 | static boolean | |
2716 | assign_file_positions_for_segments (abfd) | |
2717 | bfd *abfd; | |
2718 | { | |
2719 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2720 | unsigned int count; | |
2721 | struct elf_segment_map *m; | |
2722 | unsigned int alloc; | |
2723 | Elf_Internal_Phdr *phdrs; | |
2724 | file_ptr off, voff; | |
2725 | bfd_vma filehdr_vaddr, filehdr_paddr; | |
2726 | bfd_vma phdrs_vaddr, phdrs_paddr; | |
2727 | Elf_Internal_Phdr *p; | |
2728 | ||
2729 | if (elf_tdata (abfd)->segment_map == NULL) | |
2730 | { | |
2731 | if (! map_sections_to_segments (abfd)) | |
2732 | return false; | |
2733 | } | |
2734 | ||
2735 | if (bed->elf_backend_modify_segment_map) | |
2736 | { | |
2737 | if (! (*bed->elf_backend_modify_segment_map) (abfd)) | |
2738 | return false; | |
2739 | } | |
2740 | ||
2741 | count = 0; | |
2742 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) | |
2743 | ++count; | |
2744 | ||
2745 | elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr; | |
2746 | elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr; | |
2747 | elf_elfheader (abfd)->e_phnum = count; | |
2748 | ||
2749 | if (count == 0) | |
2750 | return true; | |
2751 | ||
2752 | /* If we already counted the number of program segments, make sure | |
2753 | that we allocated enough space. This happens when SIZEOF_HEADERS | |
2754 | is used in a linker script. */ | |
2755 | alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr; | |
2756 | if (alloc != 0 && count > alloc) | |
2757 | { | |
2758 | ((*_bfd_error_handler) | |
2759 | (_("%s: Not enough room for program headers (allocated %u, need %u)"), | |
2760 | bfd_get_filename (abfd), alloc, count)); | |
2761 | bfd_set_error (bfd_error_bad_value); | |
2762 | return false; | |
2763 | } | |
2764 | ||
2765 | if (alloc == 0) | |
2766 | alloc = count; | |
2767 | ||
2768 | phdrs = ((Elf_Internal_Phdr *) | |
2769 | bfd_alloc (abfd, alloc * sizeof (Elf_Internal_Phdr))); | |
2770 | if (phdrs == NULL) | |
2771 | return false; | |
2772 | ||
2773 | off = bed->s->sizeof_ehdr; | |
2774 | off += alloc * bed->s->sizeof_phdr; | |
2775 | ||
2776 | filehdr_vaddr = 0; | |
2777 | filehdr_paddr = 0; | |
2778 | phdrs_vaddr = 0; | |
2779 | phdrs_paddr = 0; | |
2780 | ||
2781 | for (m = elf_tdata (abfd)->segment_map, p = phdrs; | |
2782 | m != NULL; | |
2783 | m = m->next, p++) | |
2784 | { | |
2785 | unsigned int i; | |
2786 | asection **secpp; | |
2787 | ||
2788 | /* If elf_segment_map is not from map_sections_to_segments, the | |
2789 | sections may not be correctly ordered. */ | |
2790 | if (m->count > 0) | |
2791 | qsort (m->sections, (size_t) m->count, sizeof (asection *), | |
2792 | elf_sort_sections); | |
2793 | ||
2794 | p->p_type = m->p_type; | |
2795 | p->p_flags = m->p_flags; | |
2796 | ||
2797 | if (p->p_type == PT_LOAD | |
2798 | && m->count > 0 | |
2799 | && (m->sections[0]->flags & SEC_ALLOC) != 0) | |
2800 | { | |
2801 | if ((abfd->flags & D_PAGED) != 0) | |
2802 | off += (m->sections[0]->vma - off) % bed->maxpagesize; | |
2803 | else | |
2804 | { | |
2805 | bfd_size_type align; | |
2806 | ||
2807 | align = 0; | |
2808 | for (i = 0, secpp = m->sections; i < m->count; i++, secpp++) | |
2809 | { | |
2810 | bfd_size_type secalign; | |
2811 | ||
2812 | secalign = bfd_get_section_alignment (abfd, *secpp); | |
2813 | if (secalign > align) | |
2814 | align = secalign; | |
2815 | } | |
2816 | ||
2817 | off += (m->sections[0]->vma - off) % (1 << align); | |
2818 | } | |
2819 | } | |
2820 | ||
2821 | if (m->count == 0) | |
2822 | p->p_vaddr = 0; | |
2823 | else | |
2824 | p->p_vaddr = m->sections[0]->vma; | |
2825 | ||
2826 | if (m->p_paddr_valid) | |
2827 | p->p_paddr = m->p_paddr; | |
2828 | else if (m->count == 0) | |
2829 | p->p_paddr = 0; | |
2830 | else | |
2831 | p->p_paddr = m->sections[0]->lma; | |
2832 | ||
2833 | if (p->p_type == PT_LOAD | |
2834 | && (abfd->flags & D_PAGED) != 0) | |
2835 | p->p_align = bed->maxpagesize; | |
2836 | else if (m->count == 0) | |
2837 | p->p_align = bed->s->file_align; | |
2838 | else | |
2839 | p->p_align = 0; | |
2840 | ||
2841 | p->p_offset = 0; | |
2842 | p->p_filesz = 0; | |
2843 | p->p_memsz = 0; | |
2844 | ||
2845 | if (m->includes_filehdr) | |
2846 | { | |
2847 | if (! m->p_flags_valid) | |
2848 | p->p_flags |= PF_R; | |
2849 | p->p_offset = 0; | |
2850 | p->p_filesz = bed->s->sizeof_ehdr; | |
2851 | p->p_memsz = bed->s->sizeof_ehdr; | |
2852 | if (m->count > 0) | |
2853 | { | |
2854 | BFD_ASSERT (p->p_type == PT_LOAD); | |
2855 | ||
2856 | if (p->p_vaddr < (bfd_vma) off) | |
2857 | { | |
2858 | _bfd_error_handler (_("%s: Not enough room for program headers, try linking with -N"), | |
2859 | bfd_get_filename (abfd)); | |
2860 | bfd_set_error (bfd_error_bad_value); | |
2861 | return false; | |
2862 | } | |
2863 | ||
2864 | p->p_vaddr -= off; | |
2865 | if (! m->p_paddr_valid) | |
2866 | p->p_paddr -= off; | |
2867 | } | |
2868 | if (p->p_type == PT_LOAD) | |
2869 | { | |
2870 | filehdr_vaddr = p->p_vaddr; | |
2871 | filehdr_paddr = p->p_paddr; | |
2872 | } | |
2873 | } | |
2874 | ||
2875 | if (m->includes_phdrs) | |
2876 | { | |
2877 | if (! m->p_flags_valid) | |
2878 | p->p_flags |= PF_R; | |
2879 | ||
2880 | if (m->includes_filehdr) | |
2881 | { | |
2882 | if (p->p_type == PT_LOAD) | |
2883 | { | |
2884 | phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr; | |
2885 | phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr; | |
2886 | } | |
2887 | } | |
2888 | else | |
2889 | { | |
2890 | p->p_offset = bed->s->sizeof_ehdr; | |
2891 | ||
2892 | if (m->count > 0) | |
2893 | { | |
2894 | BFD_ASSERT (p->p_type == PT_LOAD); | |
2895 | p->p_vaddr -= off - p->p_offset; | |
2896 | if (! m->p_paddr_valid) | |
2897 | p->p_paddr -= off - p->p_offset; | |
2898 | } | |
2899 | ||
2900 | if (p->p_type == PT_LOAD) | |
2901 | { | |
2902 | phdrs_vaddr = p->p_vaddr; | |
2903 | phdrs_paddr = p->p_paddr; | |
2904 | } | |
2905 | else | |
2906 | phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr; | |
2907 | } | |
2908 | ||
2909 | p->p_filesz += alloc * bed->s->sizeof_phdr; | |
2910 | p->p_memsz += alloc * bed->s->sizeof_phdr; | |
2911 | } | |
2912 | ||
2913 | if (p->p_type == PT_LOAD | |
2914 | || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)) | |
2915 | { | |
2916 | if (! m->includes_filehdr && ! m->includes_phdrs) | |
2917 | p->p_offset = off; | |
2918 | else | |
2919 | { | |
2920 | file_ptr adjust; | |
2921 | ||
2922 | adjust = off - (p->p_offset + p->p_filesz); | |
2923 | p->p_filesz += adjust; | |
2924 | p->p_memsz += adjust; | |
2925 | } | |
2926 | } | |
2927 | ||
2928 | voff = off; | |
2929 | ||
2930 | for (i = 0, secpp = m->sections; i < m->count; i++, secpp++) | |
2931 | { | |
2932 | asection *sec; | |
2933 | flagword flags; | |
2934 | bfd_size_type align; | |
2935 | ||
2936 | sec = *secpp; | |
2937 | flags = sec->flags; | |
2938 | align = 1 << bfd_get_section_alignment (abfd, sec); | |
2939 | ||
2940 | /* The section may have artificial alignment forced by a | |
2941 | link script. Notice this case by the gap between the | |
2942 | cumulative phdr vma and the section's vma. */ | |
2943 | if (p->p_vaddr + p->p_memsz < sec->vma) | |
2944 | { | |
2945 | bfd_vma adjust = sec->vma - (p->p_vaddr + p->p_memsz); | |
2946 | ||
2947 | p->p_memsz += adjust; | |
2948 | off += adjust; | |
2949 | voff += adjust; | |
2950 | if ((flags & SEC_LOAD) != 0) | |
2951 | p->p_filesz += adjust; | |
2952 | } | |
2953 | ||
2954 | if (p->p_type == PT_LOAD) | |
2955 | { | |
2956 | bfd_signed_vma adjust; | |
2957 | ||
2958 | if ((flags & SEC_LOAD) != 0) | |
2959 | { | |
2960 | adjust = sec->lma - (p->p_paddr + p->p_memsz); | |
2961 | if (adjust < 0) | |
2962 | adjust = 0; | |
2963 | } | |
2964 | else if ((flags & SEC_ALLOC) != 0) | |
2965 | { | |
2966 | /* The section VMA must equal the file position | |
2967 | modulo the page size. FIXME: I'm not sure if | |
2968 | this adjustment is really necessary. We used to | |
2969 | not have the SEC_LOAD case just above, and then | |
2970 | this was necessary, but now I'm not sure. */ | |
2971 | if ((abfd->flags & D_PAGED) != 0) | |
2972 | adjust = (sec->vma - voff) % bed->maxpagesize; | |
2973 | else | |
2974 | adjust = (sec->vma - voff) % align; | |
2975 | } | |
2976 | else | |
2977 | adjust = 0; | |
2978 | ||
2979 | if (adjust != 0) | |
2980 | { | |
2981 | if (i == 0) | |
2982 | { | |
2983 | (* _bfd_error_handler) | |
2984 | (_("Error: First section in segment (%s) starts at 0x%x"), | |
2985 | bfd_section_name (abfd, sec), sec->lma); | |
2986 | (* _bfd_error_handler) | |
2987 | (_(" whereas segment starts at 0x%x"), | |
2988 | p->p_paddr); | |
2989 | ||
2990 | return false; | |
2991 | } | |
2992 | p->p_memsz += adjust; | |
2993 | off += adjust; | |
2994 | voff += adjust; | |
2995 | if ((flags & SEC_LOAD) != 0) | |
2996 | p->p_filesz += adjust; | |
2997 | } | |
2998 | ||
2999 | sec->filepos = off; | |
3000 | ||
3001 | /* We check SEC_HAS_CONTENTS here because if NOLOAD is | |
3002 | used in a linker script we may have a section with | |
3003 | SEC_LOAD clear but which is supposed to have | |
3004 | contents. */ | |
3005 | if ((flags & SEC_LOAD) != 0 | |
3006 | || (flags & SEC_HAS_CONTENTS) != 0) | |
3007 | off += sec->_raw_size; | |
3008 | ||
3009 | if ((flags & SEC_ALLOC) != 0) | |
3010 | voff += sec->_raw_size; | |
3011 | } | |
3012 | ||
3013 | if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core) | |
3014 | { | |
3015 | /* The actual "note" segment has i == 0. | |
3016 | This is the one that actually contains everything. */ | |
3017 | if (i == 0) | |
3018 | { | |
3019 | sec->filepos = off; | |
3020 | p->p_filesz = sec->_raw_size; | |
3021 | off += sec->_raw_size; | |
3022 | voff = off; | |
3023 | } | |
3024 | else | |
3025 | { | |
3026 | /* Fake sections -- don't need to be written. */ | |
3027 | sec->filepos = 0; | |
3028 | sec->_raw_size = 0; | |
3029 | flags = sec->flags = 0; | |
3030 | } | |
3031 | p->p_memsz = 0; | |
3032 | p->p_align = 1; | |
3033 | } | |
3034 | else | |
3035 | { | |
3036 | p->p_memsz += sec->_raw_size; | |
3037 | ||
3038 | if ((flags & SEC_LOAD) != 0) | |
3039 | p->p_filesz += sec->_raw_size; | |
3040 | ||
3041 | if (align > p->p_align | |
3042 | && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0)) | |
3043 | p->p_align = align; | |
3044 | } | |
3045 | ||
3046 | if (! m->p_flags_valid) | |
3047 | { | |
3048 | p->p_flags |= PF_R; | |
3049 | if ((flags & SEC_CODE) != 0) | |
3050 | p->p_flags |= PF_X; | |
3051 | if ((flags & SEC_READONLY) == 0) | |
3052 | p->p_flags |= PF_W; | |
3053 | } | |
3054 | } | |
3055 | } | |
3056 | ||
3057 | /* Now that we have set the section file positions, we can set up | |
3058 | the file positions for the non PT_LOAD segments. */ | |
3059 | for (m = elf_tdata (abfd)->segment_map, p = phdrs; | |
3060 | m != NULL; | |
3061 | m = m->next, p++) | |
3062 | { | |
3063 | if (p->p_type != PT_LOAD && m->count > 0) | |
3064 | { | |
3065 | BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs); | |
3066 | p->p_offset = m->sections[0]->filepos; | |
3067 | } | |
3068 | if (m->count == 0) | |
3069 | { | |
3070 | if (m->includes_filehdr) | |
3071 | { | |
3072 | p->p_vaddr = filehdr_vaddr; | |
3073 | if (! m->p_paddr_valid) | |
3074 | p->p_paddr = filehdr_paddr; | |
3075 | } | |
3076 | else if (m->includes_phdrs) | |
3077 | { | |
3078 | p->p_vaddr = phdrs_vaddr; | |
3079 | if (! m->p_paddr_valid) | |
3080 | p->p_paddr = phdrs_paddr; | |
3081 | } | |
3082 | } | |
3083 | } | |
3084 | ||
3085 | /* Clear out any program headers we allocated but did not use. */ | |
3086 | for (; count < alloc; count++, p++) | |
3087 | { | |
3088 | memset (p, 0, sizeof *p); | |
3089 | p->p_type = PT_NULL; | |
3090 | } | |
3091 | ||
3092 | elf_tdata (abfd)->phdr = phdrs; | |
3093 | ||
3094 | elf_tdata (abfd)->next_file_pos = off; | |
3095 | ||
3096 | /* Write out the program headers. */ | |
3097 | if (bfd_seek (abfd, bed->s->sizeof_ehdr, SEEK_SET) != 0 | |
3098 | || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0) | |
3099 | return false; | |
3100 | ||
3101 | return true; | |
3102 | } | |
3103 | ||
3104 | /* Get the size of the program header. | |
3105 | ||
3106 | If this is called by the linker before any of the section VMA's are set, it | |
3107 | can't calculate the correct value for a strange memory layout. This only | |
3108 | happens when SIZEOF_HEADERS is used in a linker script. In this case, | |
3109 | SORTED_HDRS is NULL and we assume the normal scenario of one text and one | |
3110 | data segment (exclusive of .interp and .dynamic). | |
3111 | ||
3112 | ??? User written scripts must either not use SIZEOF_HEADERS, or assume there | |
3113 | will be two segments. */ | |
3114 | ||
3115 | static bfd_size_type | |
3116 | get_program_header_size (abfd) | |
3117 | bfd *abfd; | |
3118 | { | |
3119 | size_t segs; | |
3120 | asection *s; | |
3121 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3122 | ||
3123 | /* We can't return a different result each time we're called. */ | |
3124 | if (elf_tdata (abfd)->program_header_size != 0) | |
3125 | return elf_tdata (abfd)->program_header_size; | |
3126 | ||
3127 | if (elf_tdata (abfd)->segment_map != NULL) | |
3128 | { | |
3129 | struct elf_segment_map *m; | |
3130 | ||
3131 | segs = 0; | |
3132 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) | |
3133 | ++segs; | |
3134 | elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr; | |
3135 | return elf_tdata (abfd)->program_header_size; | |
3136 | } | |
3137 | ||
3138 | /* Assume we will need exactly two PT_LOAD segments: one for text | |
3139 | and one for data. */ | |
3140 | segs = 2; | |
3141 | ||
3142 | s = bfd_get_section_by_name (abfd, ".interp"); | |
3143 | if (s != NULL && (s->flags & SEC_LOAD) != 0) | |
3144 | { | |
3145 | /* If we have a loadable interpreter section, we need a | |
3146 | PT_INTERP segment. In this case, assume we also need a | |
3147 | PT_PHDR segment, although that may not be true for all | |
3148 | targets. */ | |
3149 | segs += 2; | |
3150 | } | |
3151 | ||
3152 | if (bfd_get_section_by_name (abfd, ".dynamic") != NULL) | |
3153 | { | |
3154 | /* We need a PT_DYNAMIC segment. */ | |
3155 | ++segs; | |
3156 | } | |
3157 | ||
3158 | for (s = abfd->sections; s != NULL; s = s->next) | |
3159 | { | |
3160 | if ((s->flags & SEC_LOAD) != 0 | |
3161 | && strncmp (s->name, ".note", 5) == 0) | |
3162 | { | |
3163 | /* We need a PT_NOTE segment. */ | |
3164 | ++segs; | |
3165 | } | |
3166 | } | |
3167 | ||
3168 | /* Let the backend count up any program headers it might need. */ | |
3169 | if (bed->elf_backend_additional_program_headers) | |
3170 | { | |
3171 | int a; | |
3172 | ||
3173 | a = (*bed->elf_backend_additional_program_headers) (abfd); | |
3174 | if (a == -1) | |
3175 | abort (); | |
3176 | segs += a; | |
3177 | } | |
3178 | ||
3179 | elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr; | |
3180 | return elf_tdata (abfd)->program_header_size; | |
3181 | } | |
3182 | ||
3183 | /* Work out the file positions of all the sections. This is called by | |
3184 | _bfd_elf_compute_section_file_positions. All the section sizes and | |
3185 | VMAs must be known before this is called. | |
3186 | ||
3187 | We do not consider reloc sections at this point, unless they form | |
3188 | part of the loadable image. Reloc sections are assigned file | |
3189 | positions in assign_file_positions_for_relocs, which is called by | |
3190 | write_object_contents and final_link. | |
3191 | ||
3192 | We also don't set the positions of the .symtab and .strtab here. */ | |
3193 | ||
3194 | static boolean | |
3195 | assign_file_positions_except_relocs (abfd) | |
3196 | bfd *abfd; | |
3197 | { | |
3198 | struct elf_obj_tdata * const tdata = elf_tdata (abfd); | |
3199 | Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd); | |
3200 | Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd); | |
3201 | file_ptr off; | |
3202 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3203 | ||
3204 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 | |
3205 | && bfd_get_format (abfd) != bfd_core) | |
3206 | { | |
3207 | Elf_Internal_Shdr **hdrpp; | |
3208 | unsigned int i; | |
3209 | ||
3210 | /* Start after the ELF header. */ | |
3211 | off = i_ehdrp->e_ehsize; | |
3212 | ||
3213 | /* We are not creating an executable, which means that we are | |
3214 | not creating a program header, and that the actual order of | |
3215 | the sections in the file is unimportant. */ | |
3216 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
3217 | { | |
3218 | Elf_Internal_Shdr *hdr; | |
3219 | ||
3220 | hdr = *hdrpp; | |
3221 | if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
3222 | { | |
3223 | hdr->sh_offset = -1; | |
3224 | continue; | |
3225 | } | |
3226 | if (i == tdata->symtab_section | |
3227 | || i == tdata->strtab_section) | |
3228 | { | |
3229 | hdr->sh_offset = -1; | |
3230 | continue; | |
3231 | } | |
3232 | ||
3233 | off = _bfd_elf_assign_file_position_for_section (hdr, off, true); | |
3234 | } | |
3235 | } | |
3236 | else | |
3237 | { | |
3238 | unsigned int i; | |
3239 | Elf_Internal_Shdr **hdrpp; | |
3240 | ||
3241 | /* Assign file positions for the loaded sections based on the | |
3242 | assignment of sections to segments. */ | |
3243 | if (! assign_file_positions_for_segments (abfd)) | |
3244 | return false; | |
3245 | ||
3246 | /* Assign file positions for the other sections. */ | |
3247 | ||
3248 | off = elf_tdata (abfd)->next_file_pos; | |
3249 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
3250 | { | |
3251 | Elf_Internal_Shdr *hdr; | |
3252 | ||
3253 | hdr = *hdrpp; | |
3254 | if (hdr->bfd_section != NULL | |
3255 | && hdr->bfd_section->filepos != 0) | |
3256 | hdr->sh_offset = hdr->bfd_section->filepos; | |
3257 | else if ((hdr->sh_flags & SHF_ALLOC) != 0) | |
3258 | { | |
3259 | ((*_bfd_error_handler) | |
3260 | (_("%s: warning: allocated section `%s' not in segment"), | |
3261 | bfd_get_filename (abfd), | |
3262 | (hdr->bfd_section == NULL | |
3263 | ? "*unknown*" | |
3264 | : hdr->bfd_section->name))); | |
3265 | if ((abfd->flags & D_PAGED) != 0) | |
3266 | off += (hdr->sh_addr - off) % bed->maxpagesize; | |
3267 | else | |
3268 | off += (hdr->sh_addr - off) % hdr->sh_addralign; | |
3269 | off = _bfd_elf_assign_file_position_for_section (hdr, off, | |
3270 | false); | |
3271 | } | |
3272 | else if (hdr->sh_type == SHT_REL | |
3273 | || hdr->sh_type == SHT_RELA | |
3274 | || hdr == i_shdrpp[tdata->symtab_section] | |
3275 | || hdr == i_shdrpp[tdata->strtab_section]) | |
3276 | hdr->sh_offset = -1; | |
3277 | else | |
3278 | off = _bfd_elf_assign_file_position_for_section (hdr, off, true); | |
3279 | } | |
3280 | } | |
3281 | ||
3282 | /* Place the section headers. */ | |
3283 | off = align_file_position (off, bed->s->file_align); | |
3284 | i_ehdrp->e_shoff = off; | |
3285 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
3286 | ||
3287 | elf_tdata (abfd)->next_file_pos = off; | |
3288 | ||
3289 | return true; | |
3290 | } | |
3291 | ||
3292 | static boolean | |
3293 | prep_headers (abfd) | |
3294 | bfd *abfd; | |
3295 | { | |
3296 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
3297 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ | |
3298 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
3299 | int count; | |
3300 | struct bfd_strtab_hash *shstrtab; | |
3301 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3302 | ||
3303 | i_ehdrp = elf_elfheader (abfd); | |
3304 | i_shdrp = elf_elfsections (abfd); | |
3305 | ||
3306 | shstrtab = _bfd_elf_stringtab_init (); | |
3307 | if (shstrtab == NULL) | |
3308 | return false; | |
3309 | ||
3310 | elf_shstrtab (abfd) = shstrtab; | |
3311 | ||
3312 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; | |
3313 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; | |
3314 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; | |
3315 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; | |
3316 | ||
3317 | i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass; | |
3318 | i_ehdrp->e_ident[EI_DATA] = | |
3319 | bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB; | |
3320 | i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current; | |
3321 | ||
3322 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_NONE; | |
3323 | i_ehdrp->e_ident[EI_ABIVERSION] = 0; | |
3324 | ||
3325 | for (count = EI_PAD; count < EI_NIDENT; count++) | |
3326 | i_ehdrp->e_ident[count] = 0; | |
3327 | ||
3328 | if ((abfd->flags & DYNAMIC) != 0) | |
3329 | i_ehdrp->e_type = ET_DYN; | |
3330 | else if ((abfd->flags & EXEC_P) != 0) | |
3331 | i_ehdrp->e_type = ET_EXEC; | |
3332 | else if (bfd_get_format (abfd) == bfd_core) | |
3333 | i_ehdrp->e_type = ET_CORE; | |
3334 | else | |
3335 | i_ehdrp->e_type = ET_REL; | |
3336 | ||
3337 | switch (bfd_get_arch (abfd)) | |
3338 | { | |
3339 | case bfd_arch_unknown: | |
3340 | i_ehdrp->e_machine = EM_NONE; | |
3341 | break; | |
3342 | case bfd_arch_sparc: | |
3343 | if (bfd_get_arch_size (abfd) == 64) | |
3344 | i_ehdrp->e_machine = EM_SPARCV9; | |
3345 | else | |
3346 | i_ehdrp->e_machine = EM_SPARC; | |
3347 | break; | |
3348 | case bfd_arch_i370: | |
3349 | i_ehdrp->e_machine = EM_S370; | |
3350 | break; | |
3351 | case bfd_arch_i386: | |
3352 | if (bfd_get_arch_size (abfd) == 64) | |
3353 | i_ehdrp->e_machine = EM_X86_64; | |
3354 | else | |
3355 | i_ehdrp->e_machine = EM_386; | |
3356 | break; | |
3357 | case bfd_arch_ia64: | |
3358 | i_ehdrp->e_machine = EM_IA_64; | |
3359 | break; | |
3360 | case bfd_arch_m68hc11: | |
3361 | i_ehdrp->e_machine = EM_68HC11; | |
3362 | break; | |
3363 | case bfd_arch_m68hc12: | |
3364 | i_ehdrp->e_machine = EM_68HC12; | |
3365 | break; | |
3366 | case bfd_arch_s390: | |
3367 | i_ehdrp->e_machine = EM_S390; | |
3368 | break; | |
3369 | case bfd_arch_m68k: | |
3370 | i_ehdrp->e_machine = EM_68K; | |
3371 | break; | |
3372 | case bfd_arch_m88k: | |
3373 | i_ehdrp->e_machine = EM_88K; | |
3374 | break; | |
3375 | case bfd_arch_i860: | |
3376 | i_ehdrp->e_machine = EM_860; | |
3377 | break; | |
3378 | case bfd_arch_i960: | |
3379 | i_ehdrp->e_machine = EM_960; | |
3380 | break; | |
3381 | case bfd_arch_mips: /* MIPS Rxxxx */ | |
3382 | i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ | |
3383 | break; | |
3384 | case bfd_arch_hppa: | |
3385 | i_ehdrp->e_machine = EM_PARISC; | |
3386 | break; | |
3387 | case bfd_arch_powerpc: | |
3388 | i_ehdrp->e_machine = EM_PPC; | |
3389 | break; | |
3390 | case bfd_arch_alpha: | |
3391 | i_ehdrp->e_machine = EM_ALPHA; | |
3392 | break; | |
3393 | case bfd_arch_sh: | |
3394 | i_ehdrp->e_machine = EM_SH; | |
3395 | break; | |
3396 | case bfd_arch_d10v: | |
3397 | i_ehdrp->e_machine = EM_CYGNUS_D10V; | |
3398 | break; | |
3399 | case bfd_arch_d30v: | |
3400 | i_ehdrp->e_machine = EM_CYGNUS_D30V; | |
3401 | break; | |
3402 | case bfd_arch_fr30: | |
3403 | i_ehdrp->e_machine = EM_CYGNUS_FR30; | |
3404 | break; | |
3405 | case bfd_arch_mcore: | |
3406 | i_ehdrp->e_machine = EM_MCORE; | |
3407 | break; | |
3408 | case bfd_arch_avr: | |
3409 | i_ehdrp->e_machine = EM_AVR; | |
3410 | break; | |
3411 | case bfd_arch_v850: | |
3412 | switch (bfd_get_mach (abfd)) | |
3413 | { | |
3414 | default: | |
3415 | case 0: i_ehdrp->e_machine = EM_CYGNUS_V850; break; | |
3416 | } | |
3417 | break; | |
3418 | case bfd_arch_arc: | |
3419 | i_ehdrp->e_machine = EM_CYGNUS_ARC; | |
3420 | break; | |
3421 | case bfd_arch_arm: | |
3422 | i_ehdrp->e_machine = EM_ARM; | |
3423 | break; | |
3424 | case bfd_arch_m32r: | |
3425 | i_ehdrp->e_machine = EM_CYGNUS_M32R; | |
3426 | break; | |
3427 | case bfd_arch_mn10200: | |
3428 | i_ehdrp->e_machine = EM_CYGNUS_MN10200; | |
3429 | break; | |
3430 | case bfd_arch_mn10300: | |
3431 | i_ehdrp->e_machine = EM_CYGNUS_MN10300; | |
3432 | break; | |
3433 | case bfd_arch_pj: | |
3434 | i_ehdrp->e_machine = EM_PJ; | |
3435 | break; | |
3436 | case bfd_arch_cris: | |
3437 | i_ehdrp->e_machine = EM_CRIS; | |
3438 | break; | |
3439 | case bfd_arch_openrisc: | |
3440 | i_ehdrp->e_machine = EM_OPENRISC; | |
3441 | break; | |
3442 | /* Also note that EM_M32, AT&T WE32100 is unknown to bfd. */ | |
3443 | default: | |
3444 | i_ehdrp->e_machine = EM_NONE; | |
3445 | } | |
3446 | i_ehdrp->e_version = bed->s->ev_current; | |
3447 | i_ehdrp->e_ehsize = bed->s->sizeof_ehdr; | |
3448 | ||
3449 | /* No program header, for now. */ | |
3450 | i_ehdrp->e_phoff = 0; | |
3451 | i_ehdrp->e_phentsize = 0; | |
3452 | i_ehdrp->e_phnum = 0; | |
3453 | ||
3454 | /* Each bfd section is section header entry. */ | |
3455 | i_ehdrp->e_entry = bfd_get_start_address (abfd); | |
3456 | i_ehdrp->e_shentsize = bed->s->sizeof_shdr; | |
3457 | ||
3458 | /* If we're building an executable, we'll need a program header table. */ | |
3459 | if (abfd->flags & EXEC_P) | |
3460 | { | |
3461 | /* It all happens later. */ | |
3462 | #if 0 | |
3463 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
3464 | ||
3465 | /* elf_build_phdrs() returns a (NULL-terminated) array of | |
3466 | Elf_Internal_Phdrs. */ | |
3467 | i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); | |
3468 | i_ehdrp->e_phoff = outbase; | |
3469 | outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; | |
3470 | #endif | |
3471 | } | |
3472 | else | |
3473 | { | |
3474 | i_ehdrp->e_phentsize = 0; | |
3475 | i_phdrp = 0; | |
3476 | i_ehdrp->e_phoff = 0; | |
3477 | } | |
3478 | ||
3479 | elf_tdata (abfd)->symtab_hdr.sh_name = | |
3480 | (unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false); | |
3481 | elf_tdata (abfd)->strtab_hdr.sh_name = | |
3482 | (unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false); | |
3483 | elf_tdata (abfd)->shstrtab_hdr.sh_name = | |
3484 | (unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false); | |
3485 | if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 | |
3486 | || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 | |
3487 | || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1) | |
3488 | return false; | |
3489 | ||
3490 | return true; | |
3491 | } | |
3492 | ||
3493 | /* Assign file positions for all the reloc sections which are not part | |
3494 | of the loadable file image. */ | |
3495 | ||
3496 | void | |
3497 | _bfd_elf_assign_file_positions_for_relocs (abfd) | |
3498 | bfd *abfd; | |
3499 | { | |
3500 | file_ptr off; | |
3501 | unsigned int i; | |
3502 | Elf_Internal_Shdr **shdrpp; | |
3503 | ||
3504 | off = elf_tdata (abfd)->next_file_pos; | |
3505 | ||
3506 | for (i = 1, shdrpp = elf_elfsections (abfd) + 1; | |
3507 | i < elf_elfheader (abfd)->e_shnum; | |
3508 | i++, shdrpp++) | |
3509 | { | |
3510 | Elf_Internal_Shdr *shdrp; | |
3511 | ||
3512 | shdrp = *shdrpp; | |
3513 | if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA) | |
3514 | && shdrp->sh_offset == -1) | |
3515 | off = _bfd_elf_assign_file_position_for_section (shdrp, off, true); | |
3516 | } | |
3517 | ||
3518 | elf_tdata (abfd)->next_file_pos = off; | |
3519 | } | |
3520 | ||
3521 | boolean | |
3522 | _bfd_elf_write_object_contents (abfd) | |
3523 | bfd *abfd; | |
3524 | { | |
3525 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3526 | Elf_Internal_Ehdr *i_ehdrp; | |
3527 | Elf_Internal_Shdr **i_shdrp; | |
3528 | boolean failed; | |
3529 | unsigned int count; | |
3530 | ||
3531 | if (! abfd->output_has_begun | |
3532 | && ! _bfd_elf_compute_section_file_positions | |
3533 | (abfd, (struct bfd_link_info *) NULL)) | |
3534 | return false; | |
3535 | ||
3536 | i_shdrp = elf_elfsections (abfd); | |
3537 | i_ehdrp = elf_elfheader (abfd); | |
3538 | ||
3539 | failed = false; | |
3540 | bfd_map_over_sections (abfd, bed->s->write_relocs, &failed); | |
3541 | if (failed) | |
3542 | return false; | |
3543 | ||
3544 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
3545 | ||
3546 | /* After writing the headers, we need to write the sections too... */ | |
3547 | for (count = 1; count < i_ehdrp->e_shnum; count++) | |
3548 | { | |
3549 | if (bed->elf_backend_section_processing) | |
3550 | (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); | |
3551 | if (i_shdrp[count]->contents) | |
3552 | { | |
3553 | if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0 | |
3554 | || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, | |
3555 | 1, abfd) | |
3556 | != i_shdrp[count]->sh_size)) | |
3557 | return false; | |
3558 | } | |
3559 | } | |
3560 | ||
3561 | /* Write out the section header names. */ | |
3562 | if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0 | |
3563 | || ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd))) | |
3564 | return false; | |
3565 | ||
3566 | if (bed->elf_backend_final_write_processing) | |
3567 | (*bed->elf_backend_final_write_processing) (abfd, | |
3568 | elf_tdata (abfd)->linker); | |
3569 | ||
3570 | return bed->s->write_shdrs_and_ehdr (abfd); | |
3571 | } | |
3572 | ||
3573 | boolean | |
3574 | _bfd_elf_write_corefile_contents (abfd) | |
3575 | bfd *abfd; | |
3576 | { | |
3577 | /* Hopefully this can be done just like an object file. */ | |
3578 | return _bfd_elf_write_object_contents (abfd); | |
3579 | } | |
3580 | ||
3581 | /* Given a section, search the header to find them. */ | |
3582 | ||
3583 | int | |
3584 | _bfd_elf_section_from_bfd_section (abfd, asect) | |
3585 | bfd *abfd; | |
3586 | struct sec *asect; | |
3587 | { | |
3588 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3589 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
3590 | int index; | |
3591 | Elf_Internal_Shdr *hdr; | |
3592 | int maxindex = elf_elfheader (abfd)->e_shnum; | |
3593 | ||
3594 | for (index = 0; index < maxindex; index++) | |
3595 | { | |
3596 | hdr = i_shdrp[index]; | |
3597 | if (hdr->bfd_section == asect) | |
3598 | return index; | |
3599 | } | |
3600 | ||
3601 | if (bed->elf_backend_section_from_bfd_section) | |
3602 | { | |
3603 | for (index = 0; index < maxindex; index++) | |
3604 | { | |
3605 | int retval; | |
3606 | ||
3607 | hdr = i_shdrp[index]; | |
3608 | retval = index; | |
3609 | if ((*bed->elf_backend_section_from_bfd_section) | |
3610 | (abfd, hdr, asect, &retval)) | |
3611 | return retval; | |
3612 | } | |
3613 | } | |
3614 | ||
3615 | if (bfd_is_abs_section (asect)) | |
3616 | return SHN_ABS; | |
3617 | if (bfd_is_com_section (asect)) | |
3618 | return SHN_COMMON; | |
3619 | if (bfd_is_und_section (asect)) | |
3620 | return SHN_UNDEF; | |
3621 | ||
3622 | bfd_set_error (bfd_error_nonrepresentable_section); | |
3623 | ||
3624 | return -1; | |
3625 | } | |
3626 | ||
3627 | /* Given a BFD symbol, return the index in the ELF symbol table, or -1 | |
3628 | on error. */ | |
3629 | ||
3630 | int | |
3631 | _bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr) | |
3632 | bfd *abfd; | |
3633 | asymbol **asym_ptr_ptr; | |
3634 | { | |
3635 | asymbol *asym_ptr = *asym_ptr_ptr; | |
3636 | int idx; | |
3637 | flagword flags = asym_ptr->flags; | |
3638 | ||
3639 | /* When gas creates relocations against local labels, it creates its | |
3640 | own symbol for the section, but does put the symbol into the | |
3641 | symbol chain, so udata is 0. When the linker is generating | |
3642 | relocatable output, this section symbol may be for one of the | |
3643 | input sections rather than the output section. */ | |
3644 | if (asym_ptr->udata.i == 0 | |
3645 | && (flags & BSF_SECTION_SYM) | |
3646 | && asym_ptr->section) | |
3647 | { | |
3648 | int indx; | |
3649 | ||
3650 | if (asym_ptr->section->output_section != NULL) | |
3651 | indx = asym_ptr->section->output_section->index; | |
3652 | else | |
3653 | indx = asym_ptr->section->index; | |
3654 | if (elf_section_syms (abfd)[indx]) | |
3655 | asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i; | |
3656 | } | |
3657 | ||
3658 | idx = asym_ptr->udata.i; | |
3659 | ||
3660 | if (idx == 0) | |
3661 | { | |
3662 | /* This case can occur when using --strip-symbol on a symbol | |
3663 | which is used in a relocation entry. */ | |
3664 | (*_bfd_error_handler) | |
3665 | (_("%s: symbol `%s' required but not present"), | |
3666 | bfd_get_filename (abfd), bfd_asymbol_name (asym_ptr)); | |
3667 | bfd_set_error (bfd_error_no_symbols); | |
3668 | return -1; | |
3669 | } | |
3670 | ||
3671 | #if DEBUG & 4 | |
3672 | { | |
3673 | fprintf (stderr, | |
3674 | _("elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n"), | |
3675 | (long) asym_ptr, asym_ptr->name, idx, flags, | |
3676 | elf_symbol_flags (flags)); | |
3677 | fflush (stderr); | |
3678 | } | |
3679 | #endif | |
3680 | ||
3681 | return idx; | |
3682 | } | |
3683 | ||
3684 | /* Copy private BFD data. This copies any program header information. */ | |
3685 | ||
3686 | static boolean | |
3687 | copy_private_bfd_data (ibfd, obfd) | |
3688 | bfd *ibfd; | |
3689 | bfd *obfd; | |
3690 | { | |
3691 | Elf_Internal_Ehdr * iehdr; | |
3692 | struct elf_segment_map * map; | |
3693 | struct elf_segment_map * map_first; | |
3694 | struct elf_segment_map ** pointer_to_map; | |
3695 | Elf_Internal_Phdr * segment; | |
3696 | asection * section; | |
3697 | unsigned int i; | |
3698 | unsigned int num_segments; | |
3699 | boolean phdr_included = false; | |
3700 | bfd_vma maxpagesize; | |
3701 | struct elf_segment_map * phdr_adjust_seg = NULL; | |
3702 | unsigned int phdr_adjust_num = 0; | |
3703 | ||
3704 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
3705 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
3706 | return true; | |
3707 | ||
3708 | if (elf_tdata (ibfd)->phdr == NULL) | |
3709 | return true; | |
3710 | ||
3711 | iehdr = elf_elfheader (ibfd); | |
3712 | ||
3713 | map_first = NULL; | |
3714 | pointer_to_map = &map_first; | |
3715 | ||
3716 | num_segments = elf_elfheader (ibfd)->e_phnum; | |
3717 | maxpagesize = get_elf_backend_data (obfd)->maxpagesize; | |
3718 | ||
3719 | /* Returns the end address of the segment + 1. */ | |
3720 | #define SEGMENT_END(segment, start) \ | |
3721 | (start + (segment->p_memsz > segment->p_filesz \ | |
3722 | ? segment->p_memsz : segment->p_filesz)) | |
3723 | ||
3724 | /* Returns true if the given section is contained within | |
3725 | the given segment. VMA addresses are compared. */ | |
3726 | #define IS_CONTAINED_BY_VMA(section, segment) \ | |
3727 | (section->vma >= segment->p_vaddr \ | |
3728 | && (section->vma + section->_raw_size) \ | |
3729 | <= (SEGMENT_END (segment, segment->p_vaddr))) | |
3730 | ||
3731 | /* Returns true if the given section is contained within | |
3732 | the given segment. LMA addresses are compared. */ | |
3733 | #define IS_CONTAINED_BY_LMA(section, segment, base) \ | |
3734 | (section->lma >= base \ | |
3735 | && (section->lma + section->_raw_size) \ | |
3736 | <= SEGMENT_END (segment, base)) | |
3737 | ||
3738 | /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */ | |
3739 | #define IS_COREFILE_NOTE(p, s) \ | |
3740 | (p->p_type == PT_NOTE \ | |
3741 | && bfd_get_format (ibfd) == bfd_core \ | |
3742 | && s->vma == 0 && s->lma == 0 \ | |
3743 | && (bfd_vma) s->filepos >= p->p_offset \ | |
3744 | && (bfd_vma) s->filepos + s->_raw_size \ | |
3745 | <= p->p_offset + p->p_filesz) | |
3746 | ||
3747 | /* The complicated case when p_vaddr is 0 is to handle the Solaris | |
3748 | linker, which generates a PT_INTERP section with p_vaddr and | |
3749 | p_memsz set to 0. */ | |
3750 | #define IS_SOLARIS_PT_INTERP(p, s) \ | |
3751 | ( p->p_vaddr == 0 \ | |
3752 | && p->p_filesz > 0 \ | |
3753 | && (s->flags & SEC_HAS_CONTENTS) != 0 \ | |
3754 | && s->_raw_size > 0 \ | |
3755 | && (bfd_vma) s->filepos >= p->p_offset \ | |
3756 | && ((bfd_vma) s->filepos + s->_raw_size \ | |
3757 | <= p->p_offset + p->p_filesz)) | |
3758 | ||
3759 | /* Decide if the given section should be included in the given segment. | |
3760 | A section will be included if: | |
3761 | 1. It is within the address space of the segment, | |
3762 | 2. It is an allocated segment, | |
3763 | 3. There is an output section associated with it, | |
3764 | 4. The section has not already been allocated to a previous segment. */ | |
3765 | #define INCLUDE_SECTION_IN_SEGMENT(section, segment) \ | |
3766 | ((((IS_CONTAINED_BY_VMA (section, segment) \ | |
3767 | || IS_SOLARIS_PT_INTERP (segment, section)) \ | |
3768 | && (section->flags & SEC_ALLOC) != 0) \ | |
3769 | || IS_COREFILE_NOTE (segment, section)) \ | |
3770 | && section->output_section != NULL \ | |
3771 | && section->segment_mark == false) | |
3772 | ||
3773 | /* Returns true iff seg1 starts after the end of seg2. */ | |
3774 | #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \ | |
3775 | (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr)) | |
3776 | ||
3777 | /* Returns true iff seg1 and seg2 overlap. */ | |
3778 | #define SEGMENT_OVERLAPS(seg1, seg2) \ | |
3779 | (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) || SEGMENT_AFTER_SEGMENT (seg2, seg1))) | |
3780 | ||
3781 | /* Initialise the segment mark field. */ | |
3782 | for (section = ibfd->sections; section != NULL; section = section->next) | |
3783 | section->segment_mark = false; | |
3784 | ||
3785 | /* Scan through the segments specified in the program header | |
3786 | of the input BFD. For this first scan we look for overlaps | |
3787 | in the loadable segments. These can be created by wierd | |
3788 | parameters to objcopy. */ | |
3789 | for (i = 0, segment = elf_tdata (ibfd)->phdr; | |
3790 | i < num_segments; | |
3791 | i++, segment++) | |
3792 | { | |
3793 | unsigned int j; | |
3794 | Elf_Internal_Phdr *segment2; | |
3795 | ||
3796 | if (segment->p_type != PT_LOAD) | |
3797 | continue; | |
3798 | ||
3799 | /* Determine if this segment overlaps any previous segments. */ | |
3800 | for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++) | |
3801 | { | |
3802 | bfd_signed_vma extra_length; | |
3803 | ||
3804 | if (segment2->p_type != PT_LOAD | |
3805 | || ! SEGMENT_OVERLAPS (segment, segment2)) | |
3806 | continue; | |
3807 | ||
3808 | /* Merge the two segments together. */ | |
3809 | if (segment2->p_vaddr < segment->p_vaddr) | |
3810 | { | |
3811 | /* Extend SEGMENT2 to include SEGMENT and then delete | |
3812 | SEGMENT. */ | |
3813 | extra_length = | |
3814 | SEGMENT_END (segment, segment->p_vaddr) | |
3815 | - SEGMENT_END (segment2, segment2->p_vaddr); | |
3816 | ||
3817 | if (extra_length > 0) | |
3818 | { | |
3819 | segment2->p_memsz += extra_length; | |
3820 | segment2->p_filesz += extra_length; | |
3821 | } | |
3822 | ||
3823 | segment->p_type = PT_NULL; | |
3824 | ||
3825 | /* Since we have deleted P we must restart the outer loop. */ | |
3826 | i = 0; | |
3827 | segment = elf_tdata (ibfd)->phdr; | |
3828 | break; | |
3829 | } | |
3830 | else | |
3831 | { | |
3832 | /* Extend SEGMENT to include SEGMENT2 and then delete | |
3833 | SEGMENT2. */ | |
3834 | extra_length = | |
3835 | SEGMENT_END (segment2, segment2->p_vaddr) | |
3836 | - SEGMENT_END (segment, segment->p_vaddr); | |
3837 | ||
3838 | if (extra_length > 0) | |
3839 | { | |
3840 | segment->p_memsz += extra_length; | |
3841 | segment->p_filesz += extra_length; | |
3842 | } | |
3843 | ||
3844 | segment2->p_type = PT_NULL; | |
3845 | } | |
3846 | } | |
3847 | } | |
3848 | ||
3849 | /* The second scan attempts to assign sections to segments. */ | |
3850 | for (i = 0, segment = elf_tdata (ibfd)->phdr; | |
3851 | i < num_segments; | |
3852 | i ++, segment ++) | |
3853 | { | |
3854 | unsigned int section_count; | |
3855 | asection ** sections; | |
3856 | asection * output_section; | |
3857 | unsigned int isec; | |
3858 | bfd_vma matching_lma; | |
3859 | bfd_vma suggested_lma; | |
3860 | unsigned int j; | |
3861 | ||
3862 | if (segment->p_type == PT_NULL) | |
3863 | continue; | |
3864 | ||
3865 | /* Compute how many sections might be placed into this segment. */ | |
3866 | section_count = 0; | |
3867 | for (section = ibfd->sections; section != NULL; section = section->next) | |
3868 | if (INCLUDE_SECTION_IN_SEGMENT (section, segment)) | |
3869 | ++section_count; | |
3870 | ||
3871 | /* Allocate a segment map big enough to contain all of the | |
3872 | sections we have selected. */ | |
3873 | map = ((struct elf_segment_map *) | |
3874 | bfd_alloc (obfd, | |
3875 | (sizeof (struct elf_segment_map) | |
3876 | + ((size_t) section_count - 1) * sizeof (asection *)))); | |
3877 | if (map == NULL) | |
3878 | return false; | |
3879 | ||
3880 | /* Initialise the fields of the segment map. Default to | |
3881 | using the physical address of the segment in the input BFD. */ | |
3882 | map->next = NULL; | |
3883 | map->p_type = segment->p_type; | |
3884 | map->p_flags = segment->p_flags; | |
3885 | map->p_flags_valid = 1; | |
3886 | map->p_paddr = segment->p_paddr; | |
3887 | map->p_paddr_valid = 1; | |
3888 | ||
3889 | /* Determine if this segment contains the ELF file header | |
3890 | and if it contains the program headers themselves. */ | |
3891 | map->includes_filehdr = (segment->p_offset == 0 | |
3892 | && segment->p_filesz >= iehdr->e_ehsize); | |
3893 | ||
3894 | map->includes_phdrs = 0; | |
3895 | ||
3896 | if (! phdr_included || segment->p_type != PT_LOAD) | |
3897 | { | |
3898 | map->includes_phdrs = | |
3899 | (segment->p_offset <= (bfd_vma) iehdr->e_phoff | |
3900 | && (segment->p_offset + segment->p_filesz | |
3901 | >= ((bfd_vma) iehdr->e_phoff | |
3902 | + iehdr->e_phnum * iehdr->e_phentsize))); | |
3903 | ||
3904 | if (segment->p_type == PT_LOAD && map->includes_phdrs) | |
3905 | phdr_included = true; | |
3906 | } | |
3907 | ||
3908 | if (section_count == 0) | |
3909 | { | |
3910 | /* Special segments, such as the PT_PHDR segment, may contain | |
3911 | no sections, but ordinary, loadable segments should contain | |
3912 | something. */ | |
3913 | if (segment->p_type == PT_LOAD) | |
3914 | _bfd_error_handler | |
3915 | (_("%s: warning: Empty loadable segment detected\n"), | |
3916 | bfd_get_filename (ibfd)); | |
3917 | ||
3918 | map->count = 0; | |
3919 | *pointer_to_map = map; | |
3920 | pointer_to_map = &map->next; | |
3921 | ||
3922 | continue; | |
3923 | } | |
3924 | ||
3925 | /* Now scan the sections in the input BFD again and attempt | |
3926 | to add their corresponding output sections to the segment map. | |
3927 | The problem here is how to handle an output section which has | |
3928 | been moved (ie had its LMA changed). There are four possibilities: | |
3929 | ||
3930 | 1. None of the sections have been moved. | |
3931 | In this case we can continue to use the segment LMA from the | |
3932 | input BFD. | |
3933 | ||
3934 | 2. All of the sections have been moved by the same amount. | |
3935 | In this case we can change the segment's LMA to match the LMA | |
3936 | of the first section. | |
3937 | ||
3938 | 3. Some of the sections have been moved, others have not. | |
3939 | In this case those sections which have not been moved can be | |
3940 | placed in the current segment which will have to have its size, | |
3941 | and possibly its LMA changed, and a new segment or segments will | |
3942 | have to be created to contain the other sections. | |
3943 | ||
3944 | 4. The sections have been moved, but not be the same amount. | |
3945 | In this case we can change the segment's LMA to match the LMA | |
3946 | of the first section and we will have to create a new segment | |
3947 | or segments to contain the other sections. | |
3948 | ||
3949 | In order to save time, we allocate an array to hold the section | |
3950 | pointers that we are interested in. As these sections get assigned | |
3951 | to a segment, they are removed from this array. */ | |
3952 | ||
3953 | sections = (asection **) bfd_malloc | |
3954 | (sizeof (asection *) * section_count); | |
3955 | if (sections == NULL) | |
3956 | return false; | |
3957 | ||
3958 | /* Step One: Scan for segment vs section LMA conflicts. | |
3959 | Also add the sections to the section array allocated above. | |
3960 | Also add the sections to the current segment. In the common | |
3961 | case, where the sections have not been moved, this means that | |
3962 | we have completely filled the segment, and there is nothing | |
3963 | more to do. */ | |
3964 | isec = 0; | |
3965 | matching_lma = 0; | |
3966 | suggested_lma = 0; | |
3967 | ||
3968 | for (j = 0, section = ibfd->sections; | |
3969 | section != NULL; | |
3970 | section = section->next) | |
3971 | { | |
3972 | if (INCLUDE_SECTION_IN_SEGMENT (section, segment)) | |
3973 | { | |
3974 | output_section = section->output_section; | |
3975 | ||
3976 | sections[j ++] = section; | |
3977 | ||
3978 | /* The Solaris native linker always sets p_paddr to 0. | |
3979 | We try to catch that case here, and set it to the | |
3980 | correct value. */ | |
3981 | if (segment->p_paddr == 0 | |
3982 | && segment->p_vaddr != 0 | |
3983 | && isec == 0 | |
3984 | && output_section->lma != 0 | |
3985 | && (output_section->vma == (segment->p_vaddr | |
3986 | + (map->includes_filehdr | |
3987 | ? iehdr->e_ehsize | |
3988 | : 0) | |
3989 | + (map->includes_phdrs | |
3990 | ? iehdr->e_phnum * iehdr->e_phentsize | |
3991 | : 0)))) | |
3992 | map->p_paddr = segment->p_vaddr; | |
3993 | ||
3994 | /* Match up the physical address of the segment with the | |
3995 | LMA address of the output section. */ | |
3996 | if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr) | |
3997 | || IS_COREFILE_NOTE (segment, section)) | |
3998 | { | |
3999 | if (matching_lma == 0) | |
4000 | matching_lma = output_section->lma; | |
4001 | ||
4002 | /* We assume that if the section fits within the segment | |
4003 | then it does not overlap any other section within that | |
4004 | segment. */ | |
4005 | map->sections[isec ++] = output_section; | |
4006 | } | |
4007 | else if (suggested_lma == 0) | |
4008 | suggested_lma = output_section->lma; | |
4009 | } | |
4010 | } | |
4011 | ||
4012 | BFD_ASSERT (j == section_count); | |
4013 | ||
4014 | /* Step Two: Adjust the physical address of the current segment, | |
4015 | if necessary. */ | |
4016 | if (isec == section_count) | |
4017 | { | |
4018 | /* All of the sections fitted within the segment as currently | |
4019 | specified. This is the default case. Add the segment to | |
4020 | the list of built segments and carry on to process the next | |
4021 | program header in the input BFD. */ | |
4022 | map->count = section_count; | |
4023 | *pointer_to_map = map; | |
4024 | pointer_to_map = &map->next; | |
4025 | ||
4026 | free (sections); | |
4027 | continue; | |
4028 | } | |
4029 | else | |
4030 | { | |
4031 | if (matching_lma != 0) | |
4032 | { | |
4033 | /* At least one section fits inside the current segment. | |
4034 | Keep it, but modify its physical address to match the | |
4035 | LMA of the first section that fitted. */ | |
4036 | map->p_paddr = matching_lma; | |
4037 | } | |
4038 | else | |
4039 | { | |
4040 | /* None of the sections fitted inside the current segment. | |
4041 | Change the current segment's physical address to match | |
4042 | the LMA of the first section. */ | |
4043 | map->p_paddr = suggested_lma; | |
4044 | } | |
4045 | ||
4046 | /* Offset the segment physical address from the lma | |
4047 | to allow for space taken up by elf headers. */ | |
4048 | if (map->includes_filehdr) | |
4049 | map->p_paddr -= iehdr->e_ehsize; | |
4050 | ||
4051 | if (map->includes_phdrs) | |
4052 | { | |
4053 | map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize; | |
4054 | ||
4055 | /* iehdr->e_phnum is just an estimate of the number | |
4056 | of program headers that we will need. Make a note | |
4057 | here of the number we used and the segment we chose | |
4058 | to hold these headers, so that we can adjust the | |
4059 | offset when we know the correct value. */ | |
4060 | phdr_adjust_num = iehdr->e_phnum; | |
4061 | phdr_adjust_seg = map; | |
4062 | } | |
4063 | } | |
4064 | ||
4065 | /* Step Three: Loop over the sections again, this time assigning | |
4066 | those that fit to the current segment and remvoing them from the | |
4067 | sections array; but making sure not to leave large gaps. Once all | |
4068 | possible sections have been assigned to the current segment it is | |
4069 | added to the list of built segments and if sections still remain | |
4070 | to be assigned, a new segment is constructed before repeating | |
4071 | the loop. */ | |
4072 | isec = 0; | |
4073 | do | |
4074 | { | |
4075 | map->count = 0; | |
4076 | suggested_lma = 0; | |
4077 | ||
4078 | /* Fill the current segment with sections that fit. */ | |
4079 | for (j = 0; j < section_count; j++) | |
4080 | { | |
4081 | section = sections[j]; | |
4082 | ||
4083 | if (section == NULL) | |
4084 | continue; | |
4085 | ||
4086 | output_section = section->output_section; | |
4087 | ||
4088 | BFD_ASSERT (output_section != NULL); | |
4089 | ||
4090 | if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr) | |
4091 | || IS_COREFILE_NOTE (segment, section)) | |
4092 | { | |
4093 | if (map->count == 0) | |
4094 | { | |
4095 | /* If the first section in a segment does not start at | |
4096 | the beginning of the segment, then something is | |
4097 | wrong. */ | |
4098 | if (output_section->lma != | |
4099 | (map->p_paddr | |
4100 | + (map->includes_filehdr ? iehdr->e_ehsize : 0) | |
4101 | + (map->includes_phdrs | |
4102 | ? iehdr->e_phnum * iehdr->e_phentsize | |
4103 | : 0))) | |
4104 | abort (); | |
4105 | } | |
4106 | else | |
4107 | { | |
4108 | asection * prev_sec; | |
4109 | ||
4110 | prev_sec = map->sections[map->count - 1]; | |
4111 | ||
4112 | /* If the gap between the end of the previous section | |
4113 | and the start of this section is more than | |
4114 | maxpagesize then we need to start a new segment. */ | |
4115 | if ((BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size, maxpagesize) | |
4116 | < BFD_ALIGN (output_section->lma, maxpagesize)) | |
4117 | || ((prev_sec->lma + prev_sec->_raw_size) > output_section->lma)) | |
4118 | { | |
4119 | if (suggested_lma == 0) | |
4120 | suggested_lma = output_section->lma; | |
4121 | ||
4122 | continue; | |
4123 | } | |
4124 | } | |
4125 | ||
4126 | map->sections[map->count++] = output_section; | |
4127 | ++isec; | |
4128 | sections[j] = NULL; | |
4129 | section->segment_mark = true; | |
4130 | } | |
4131 | else if (suggested_lma == 0) | |
4132 | suggested_lma = output_section->lma; | |
4133 | } | |
4134 | ||
4135 | BFD_ASSERT (map->count > 0); | |
4136 | ||
4137 | /* Add the current segment to the list of built segments. */ | |
4138 | *pointer_to_map = map; | |
4139 | pointer_to_map = &map->next; | |
4140 | ||
4141 | if (isec < section_count) | |
4142 | { | |
4143 | /* We still have not allocated all of the sections to | |
4144 | segments. Create a new segment here, initialise it | |
4145 | and carry on looping. */ | |
4146 | map = ((struct elf_segment_map *) | |
4147 | bfd_alloc (obfd, | |
4148 | (sizeof (struct elf_segment_map) | |
4149 | + ((size_t) section_count - 1) | |
4150 | * sizeof (asection *)))); | |
4151 | if (map == NULL) | |
4152 | return false; | |
4153 | ||
4154 | /* Initialise the fields of the segment map. Set the physical | |
4155 | physical address to the LMA of the first section that has | |
4156 | not yet been assigned. */ | |
4157 | map->next = NULL; | |
4158 | map->p_type = segment->p_type; | |
4159 | map->p_flags = segment->p_flags; | |
4160 | map->p_flags_valid = 1; | |
4161 | map->p_paddr = suggested_lma; | |
4162 | map->p_paddr_valid = 1; | |
4163 | map->includes_filehdr = 0; | |
4164 | map->includes_phdrs = 0; | |
4165 | } | |
4166 | } | |
4167 | while (isec < section_count); | |
4168 | ||
4169 | free (sections); | |
4170 | } | |
4171 | ||
4172 | /* The Solaris linker creates program headers in which all the | |
4173 | p_paddr fields are zero. When we try to objcopy or strip such a | |
4174 | file, we get confused. Check for this case, and if we find it | |
4175 | reset the p_paddr_valid fields. */ | |
4176 | for (map = map_first; map != NULL; map = map->next) | |
4177 | if (map->p_paddr != 0) | |
4178 | break; | |
4179 | if (map == NULL) | |
4180 | { | |
4181 | for (map = map_first; map != NULL; map = map->next) | |
4182 | map->p_paddr_valid = 0; | |
4183 | } | |
4184 | ||
4185 | elf_tdata (obfd)->segment_map = map_first; | |
4186 | ||
4187 | /* If we had to estimate the number of program headers that were | |
4188 | going to be needed, then check our estimate know and adjust | |
4189 | the offset if necessary. */ | |
4190 | if (phdr_adjust_seg != NULL) | |
4191 | { | |
4192 | unsigned int count; | |
4193 | ||
4194 | for (count = 0, map = map_first; map != NULL; map = map->next) | |
4195 | count++; | |
4196 | ||
4197 | if (count > phdr_adjust_num) | |
4198 | phdr_adjust_seg->p_paddr | |
4199 | -= (count - phdr_adjust_num) * iehdr->e_phentsize; | |
4200 | } | |
4201 | ||
4202 | #if 0 | |
4203 | /* Final Step: Sort the segments into ascending order of physical | |
4204 | address. */ | |
4205 | if (map_first != NULL) | |
4206 | { | |
4207 | struct elf_segment_map *prev; | |
4208 | ||
4209 | prev = map_first; | |
4210 | for (map = map_first->next; map != NULL; prev = map, map = map->next) | |
4211 | { | |
4212 | /* Yes I know - its a bubble sort.... */ | |
4213 | if (map->next != NULL && (map->next->p_paddr < map->p_paddr)) | |
4214 | { | |
4215 | /* Swap map and map->next. */ | |
4216 | prev->next = map->next; | |
4217 | map->next = map->next->next; | |
4218 | prev->next->next = map; | |
4219 | ||
4220 | /* Restart loop. */ | |
4221 | map = map_first; | |
4222 | } | |
4223 | } | |
4224 | } | |
4225 | #endif | |
4226 | ||
4227 | #undef SEGMENT_END | |
4228 | #undef IS_CONTAINED_BY_VMA | |
4229 | #undef IS_CONTAINED_BY_LMA | |
4230 | #undef IS_COREFILE_NOTE | |
4231 | #undef IS_SOLARIS_PT_INTERP | |
4232 | #undef INCLUDE_SECTION_IN_SEGMENT | |
4233 | #undef SEGMENT_AFTER_SEGMENT | |
4234 | #undef SEGMENT_OVERLAPS | |
4235 | return true; | |
4236 | } | |
4237 | ||
4238 | /* Copy private section information. This copies over the entsize | |
4239 | field, and sometimes the info field. */ | |
4240 | ||
4241 | boolean | |
4242 | _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec) | |
4243 | bfd *ibfd; | |
4244 | asection *isec; | |
4245 | bfd *obfd; | |
4246 | asection *osec; | |
4247 | { | |
4248 | Elf_Internal_Shdr *ihdr, *ohdr; | |
4249 | ||
4250 | if (ibfd->xvec->flavour != bfd_target_elf_flavour | |
4251 | || obfd->xvec->flavour != bfd_target_elf_flavour) | |
4252 | return true; | |
4253 | ||
4254 | /* Copy over private BFD data if it has not already been copied. | |
4255 | This must be done here, rather than in the copy_private_bfd_data | |
4256 | entry point, because the latter is called after the section | |
4257 | contents have been set, which means that the program headers have | |
4258 | already been worked out. */ | |
4259 | if (elf_tdata (obfd)->segment_map == NULL | |
4260 | && elf_tdata (ibfd)->phdr != NULL) | |
4261 | { | |
4262 | asection *s; | |
4263 | ||
4264 | /* Only set up the segments if there are no more SEC_ALLOC | |
4265 | sections. FIXME: This won't do the right thing if objcopy is | |
4266 | used to remove the last SEC_ALLOC section, since objcopy | |
4267 | won't call this routine in that case. */ | |
4268 | for (s = isec->next; s != NULL; s = s->next) | |
4269 | if ((s->flags & SEC_ALLOC) != 0) | |
4270 | break; | |
4271 | if (s == NULL) | |
4272 | { | |
4273 | if (! copy_private_bfd_data (ibfd, obfd)) | |
4274 | return false; | |
4275 | } | |
4276 | } | |
4277 | ||
4278 | ihdr = &elf_section_data (isec)->this_hdr; | |
4279 | ohdr = &elf_section_data (osec)->this_hdr; | |
4280 | ||
4281 | ohdr->sh_entsize = ihdr->sh_entsize; | |
4282 | ||
4283 | if (ihdr->sh_type == SHT_SYMTAB | |
4284 | || ihdr->sh_type == SHT_DYNSYM | |
4285 | || ihdr->sh_type == SHT_GNU_verneed | |
4286 | || ihdr->sh_type == SHT_GNU_verdef) | |
4287 | ohdr->sh_info = ihdr->sh_info; | |
4288 | ||
4289 | elf_section_data (osec)->use_rela_p | |
4290 | = elf_section_data (isec)->use_rela_p; | |
4291 | ||
4292 | return true; | |
4293 | } | |
4294 | ||
4295 | /* Copy private symbol information. If this symbol is in a section | |
4296 | which we did not map into a BFD section, try to map the section | |
4297 | index correctly. We use special macro definitions for the mapped | |
4298 | section indices; these definitions are interpreted by the | |
4299 | swap_out_syms function. */ | |
4300 | ||
4301 | #define MAP_ONESYMTAB (SHN_LORESERVE - 1) | |
4302 | #define MAP_DYNSYMTAB (SHN_LORESERVE - 2) | |
4303 | #define MAP_STRTAB (SHN_LORESERVE - 3) | |
4304 | #define MAP_SHSTRTAB (SHN_LORESERVE - 4) | |
4305 | ||
4306 | boolean | |
4307 | _bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg) | |
4308 | bfd *ibfd; | |
4309 | asymbol *isymarg; | |
4310 | bfd *obfd; | |
4311 | asymbol *osymarg; | |
4312 | { | |
4313 | elf_symbol_type *isym, *osym; | |
4314 | ||
4315 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
4316 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
4317 | return true; | |
4318 | ||
4319 | isym = elf_symbol_from (ibfd, isymarg); | |
4320 | osym = elf_symbol_from (obfd, osymarg); | |
4321 | ||
4322 | if (isym != NULL | |
4323 | && osym != NULL | |
4324 | && bfd_is_abs_section (isym->symbol.section)) | |
4325 | { | |
4326 | unsigned int shndx; | |
4327 | ||
4328 | shndx = isym->internal_elf_sym.st_shndx; | |
4329 | if (shndx == elf_onesymtab (ibfd)) | |
4330 | shndx = MAP_ONESYMTAB; | |
4331 | else if (shndx == elf_dynsymtab (ibfd)) | |
4332 | shndx = MAP_DYNSYMTAB; | |
4333 | else if (shndx == elf_tdata (ibfd)->strtab_section) | |
4334 | shndx = MAP_STRTAB; | |
4335 | else if (shndx == elf_tdata (ibfd)->shstrtab_section) | |
4336 | shndx = MAP_SHSTRTAB; | |
4337 | osym->internal_elf_sym.st_shndx = shndx; | |
4338 | } | |
4339 | ||
4340 | return true; | |
4341 | } | |
4342 | ||
4343 | /* Swap out the symbols. */ | |
4344 | ||
4345 | static boolean | |
4346 | swap_out_syms (abfd, sttp, relocatable_p) | |
4347 | bfd *abfd; | |
4348 | struct bfd_strtab_hash **sttp; | |
4349 | int relocatable_p; | |
4350 | { | |
4351 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
4352 | ||
4353 | if (!elf_map_symbols (abfd)) | |
4354 | return false; | |
4355 | ||
4356 | /* Dump out the symtabs. */ | |
4357 | { | |
4358 | int symcount = bfd_get_symcount (abfd); | |
4359 | asymbol **syms = bfd_get_outsymbols (abfd); | |
4360 | struct bfd_strtab_hash *stt; | |
4361 | Elf_Internal_Shdr *symtab_hdr; | |
4362 | Elf_Internal_Shdr *symstrtab_hdr; | |
4363 | char *outbound_syms; | |
4364 | int idx; | |
4365 | ||
4366 | stt = _bfd_elf_stringtab_init (); | |
4367 | if (stt == NULL) | |
4368 | return false; | |
4369 | ||
4370 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
4371 | symtab_hdr->sh_type = SHT_SYMTAB; | |
4372 | symtab_hdr->sh_entsize = bed->s->sizeof_sym; | |
4373 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); | |
4374 | symtab_hdr->sh_info = elf_num_locals (abfd) + 1; | |
4375 | symtab_hdr->sh_addralign = bed->s->file_align; | |
4376 | ||
4377 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
4378 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
4379 | ||
4380 | outbound_syms = bfd_alloc (abfd, | |
4381 | (1 + symcount) * bed->s->sizeof_sym); | |
4382 | if (outbound_syms == NULL) | |
4383 | return false; | |
4384 | symtab_hdr->contents = (PTR) outbound_syms; | |
4385 | ||
4386 | /* now generate the data (for "contents") */ | |
4387 | { | |
4388 | /* Fill in zeroth symbol and swap it out. */ | |
4389 | Elf_Internal_Sym sym; | |
4390 | sym.st_name = 0; | |
4391 | sym.st_value = 0; | |
4392 | sym.st_size = 0; | |
4393 | sym.st_info = 0; | |
4394 | sym.st_other = 0; | |
4395 | sym.st_shndx = SHN_UNDEF; | |
4396 | bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms); | |
4397 | outbound_syms += bed->s->sizeof_sym; | |
4398 | } | |
4399 | for (idx = 0; idx < symcount; idx++) | |
4400 | { | |
4401 | Elf_Internal_Sym sym; | |
4402 | bfd_vma value = syms[idx]->value; | |
4403 | elf_symbol_type *type_ptr; | |
4404 | flagword flags = syms[idx]->flags; | |
4405 | int type; | |
4406 | ||
4407 | if ((flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM) | |
4408 | { | |
4409 | /* Local section symbols have no name. */ | |
4410 | sym.st_name = 0; | |
4411 | } | |
4412 | else | |
4413 | { | |
4414 | sym.st_name = (unsigned long) _bfd_stringtab_add (stt, | |
4415 | syms[idx]->name, | |
4416 | true, false); | |
4417 | if (sym.st_name == (unsigned long) -1) | |
4418 | return false; | |
4419 | } | |
4420 | ||
4421 | type_ptr = elf_symbol_from (abfd, syms[idx]); | |
4422 | ||
4423 | if ((flags & BSF_SECTION_SYM) == 0 | |
4424 | && bfd_is_com_section (syms[idx]->section)) | |
4425 | { | |
4426 | /* ELF common symbols put the alignment into the `value' field, | |
4427 | and the size into the `size' field. This is backwards from | |
4428 | how BFD handles it, so reverse it here. */ | |
4429 | sym.st_size = value; | |
4430 | if (type_ptr == NULL | |
4431 | || type_ptr->internal_elf_sym.st_value == 0) | |
4432 | sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value)); | |
4433 | else | |
4434 | sym.st_value = type_ptr->internal_elf_sym.st_value; | |
4435 | sym.st_shndx = _bfd_elf_section_from_bfd_section | |
4436 | (abfd, syms[idx]->section); | |
4437 | } | |
4438 | else | |
4439 | { | |
4440 | asection *sec = syms[idx]->section; | |
4441 | int shndx; | |
4442 | ||
4443 | if (sec->output_section) | |
4444 | { | |
4445 | value += sec->output_offset; | |
4446 | sec = sec->output_section; | |
4447 | } | |
4448 | /* Don't add in the section vma for relocatable output. */ | |
4449 | if (! relocatable_p) | |
4450 | value += sec->vma; | |
4451 | sym.st_value = value; | |
4452 | sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; | |
4453 | ||
4454 | if (bfd_is_abs_section (sec) | |
4455 | && type_ptr != NULL | |
4456 | && type_ptr->internal_elf_sym.st_shndx != 0) | |
4457 | { | |
4458 | /* This symbol is in a real ELF section which we did | |
4459 | not create as a BFD section. Undo the mapping done | |
4460 | by copy_private_symbol_data. */ | |
4461 | shndx = type_ptr->internal_elf_sym.st_shndx; | |
4462 | switch (shndx) | |
4463 | { | |
4464 | case MAP_ONESYMTAB: | |
4465 | shndx = elf_onesymtab (abfd); | |
4466 | break; | |
4467 | case MAP_DYNSYMTAB: | |
4468 | shndx = elf_dynsymtab (abfd); | |
4469 | break; | |
4470 | case MAP_STRTAB: | |
4471 | shndx = elf_tdata (abfd)->strtab_section; | |
4472 | break; | |
4473 | case MAP_SHSTRTAB: | |
4474 | shndx = elf_tdata (abfd)->shstrtab_section; | |
4475 | break; | |
4476 | default: | |
4477 | break; | |
4478 | } | |
4479 | } | |
4480 | else | |
4481 | { | |
4482 | shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
4483 | ||
4484 | if (shndx == -1) | |
4485 | { | |
4486 | asection *sec2; | |
4487 | ||
4488 | /* Writing this would be a hell of a lot easier if | |
4489 | we had some decent documentation on bfd, and | |
4490 | knew what to expect of the library, and what to | |
4491 | demand of applications. For example, it | |
4492 | appears that `objcopy' might not set the | |
4493 | section of a symbol to be a section that is | |
4494 | actually in the output file. */ | |
4495 | sec2 = bfd_get_section_by_name (abfd, sec->name); | |
4496 | BFD_ASSERT (sec2 != 0); | |
4497 | shndx = _bfd_elf_section_from_bfd_section (abfd, sec2); | |
4498 | BFD_ASSERT (shndx != -1); | |
4499 | } | |
4500 | } | |
4501 | ||
4502 | sym.st_shndx = shndx; | |
4503 | } | |
4504 | ||
4505 | if ((flags & BSF_FUNCTION) != 0) | |
4506 | type = STT_FUNC; | |
4507 | else if ((flags & BSF_OBJECT) != 0) | |
4508 | type = STT_OBJECT; | |
4509 | else | |
4510 | type = STT_NOTYPE; | |
4511 | ||
4512 | /* Processor-specific types */ | |
4513 | if (type_ptr != NULL | |
4514 | && bed->elf_backend_get_symbol_type) | |
4515 | type = (*bed->elf_backend_get_symbol_type) (&type_ptr->internal_elf_sym, type); | |
4516 | ||
4517 | if (flags & BSF_SECTION_SYM) | |
4518 | { | |
4519 | if (flags & BSF_GLOBAL) | |
4520 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); | |
4521 | else | |
4522 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
4523 | } | |
4524 | else if (bfd_is_com_section (syms[idx]->section)) | |
4525 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, type); | |
4526 | else if (bfd_is_und_section (syms[idx]->section)) | |
4527 | sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK) | |
4528 | ? STB_WEAK | |
4529 | : STB_GLOBAL), | |
4530 | type); | |
4531 | else if (flags & BSF_FILE) | |
4532 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
4533 | else | |
4534 | { | |
4535 | int bind = STB_LOCAL; | |
4536 | ||
4537 | if (flags & BSF_LOCAL) | |
4538 | bind = STB_LOCAL; | |
4539 | else if (flags & BSF_WEAK) | |
4540 | bind = STB_WEAK; | |
4541 | else if (flags & BSF_GLOBAL) | |
4542 | bind = STB_GLOBAL; | |
4543 | ||
4544 | sym.st_info = ELF_ST_INFO (bind, type); | |
4545 | } | |
4546 | ||
4547 | if (type_ptr != NULL) | |
4548 | sym.st_other = type_ptr->internal_elf_sym.st_other; | |
4549 | else | |
4550 | sym.st_other = 0; | |
4551 | ||
4552 | bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms); | |
4553 | outbound_syms += bed->s->sizeof_sym; | |
4554 | } | |
4555 | ||
4556 | *sttp = stt; | |
4557 | symstrtab_hdr->sh_size = _bfd_stringtab_size (stt); | |
4558 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
4559 | ||
4560 | symstrtab_hdr->sh_flags = 0; | |
4561 | symstrtab_hdr->sh_addr = 0; | |
4562 | symstrtab_hdr->sh_entsize = 0; | |
4563 | symstrtab_hdr->sh_link = 0; | |
4564 | symstrtab_hdr->sh_info = 0; | |
4565 | symstrtab_hdr->sh_addralign = 1; | |
4566 | } | |
4567 | ||
4568 | return true; | |
4569 | } | |
4570 | ||
4571 | /* Return the number of bytes required to hold the symtab vector. | |
4572 | ||
4573 | Note that we base it on the count plus 1, since we will null terminate | |
4574 | the vector allocated based on this size. However, the ELF symbol table | |
4575 | always has a dummy entry as symbol #0, so it ends up even. */ | |
4576 | ||
4577 | long | |
4578 | _bfd_elf_get_symtab_upper_bound (abfd) | |
4579 | bfd *abfd; | |
4580 | { | |
4581 | long symcount; | |
4582 | long symtab_size; | |
4583 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr; | |
4584 | ||
4585 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
4586 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); | |
4587 | ||
4588 | return symtab_size; | |
4589 | } | |
4590 | ||
4591 | long | |
4592 | _bfd_elf_get_dynamic_symtab_upper_bound (abfd) | |
4593 | bfd *abfd; | |
4594 | { | |
4595 | long symcount; | |
4596 | long symtab_size; | |
4597 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
4598 | ||
4599 | if (elf_dynsymtab (abfd) == 0) | |
4600 | { | |
4601 | bfd_set_error (bfd_error_invalid_operation); | |
4602 | return -1; | |
4603 | } | |
4604 | ||
4605 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
4606 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); | |
4607 | ||
4608 | return symtab_size; | |
4609 | } | |
4610 | ||
4611 | long | |
4612 | _bfd_elf_get_reloc_upper_bound (abfd, asect) | |
4613 | bfd *abfd ATTRIBUTE_UNUSED; | |
4614 | sec_ptr asect; | |
4615 | { | |
4616 | return (asect->reloc_count + 1) * sizeof (arelent *); | |
4617 | } | |
4618 | ||
4619 | /* Canonicalize the relocs. */ | |
4620 | ||
4621 | long | |
4622 | _bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols) | |
4623 | bfd *abfd; | |
4624 | sec_ptr section; | |
4625 | arelent **relptr; | |
4626 | asymbol **symbols; | |
4627 | { | |
4628 | arelent *tblptr; | |
4629 | unsigned int i; | |
4630 | ||
4631 | if (! get_elf_backend_data (abfd)->s->slurp_reloc_table (abfd, | |
4632 | section, | |
4633 | symbols, | |
4634 | false)) | |
4635 | return -1; | |
4636 | ||
4637 | tblptr = section->relocation; | |
4638 | for (i = 0; i < section->reloc_count; i++) | |
4639 | *relptr++ = tblptr++; | |
4640 | ||
4641 | *relptr = NULL; | |
4642 | ||
4643 | return section->reloc_count; | |
4644 | } | |
4645 | ||
4646 | long | |
4647 | _bfd_elf_get_symtab (abfd, alocation) | |
4648 | bfd *abfd; | |
4649 | asymbol **alocation; | |
4650 | { | |
4651 | long symcount = get_elf_backend_data (abfd)->s->slurp_symbol_table | |
4652 | (abfd, alocation, false); | |
4653 | ||
4654 | if (symcount >= 0) | |
4655 | bfd_get_symcount (abfd) = symcount; | |
4656 | return symcount; | |
4657 | } | |
4658 | ||
4659 | long | |
4660 | _bfd_elf_canonicalize_dynamic_symtab (abfd, alocation) | |
4661 | bfd *abfd; | |
4662 | asymbol **alocation; | |
4663 | { | |
4664 | return get_elf_backend_data (abfd)->s->slurp_symbol_table | |
4665 | (abfd, alocation, true); | |
4666 | } | |
4667 | ||
4668 | /* Return the size required for the dynamic reloc entries. Any | |
4669 | section that was actually installed in the BFD, and has type | |
4670 | SHT_REL or SHT_RELA, and uses the dynamic symbol table, is | |
4671 | considered to be a dynamic reloc section. */ | |
4672 | ||
4673 | long | |
4674 | _bfd_elf_get_dynamic_reloc_upper_bound (abfd) | |
4675 | bfd *abfd; | |
4676 | { | |
4677 | long ret; | |
4678 | asection *s; | |
4679 | ||
4680 | if (elf_dynsymtab (abfd) == 0) | |
4681 | { | |
4682 | bfd_set_error (bfd_error_invalid_operation); | |
4683 | return -1; | |
4684 | } | |
4685 | ||
4686 | ret = sizeof (arelent *); | |
4687 | for (s = abfd->sections; s != NULL; s = s->next) | |
4688 | if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd) | |
4689 | && (elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
4690 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA)) | |
4691 | ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize) | |
4692 | * sizeof (arelent *)); | |
4693 | ||
4694 | return ret; | |
4695 | } | |
4696 | ||
4697 | /* Canonicalize the dynamic relocation entries. Note that we return | |
4698 | the dynamic relocations as a single block, although they are | |
4699 | actually associated with particular sections; the interface, which | |
4700 | was designed for SunOS style shared libraries, expects that there | |
4701 | is only one set of dynamic relocs. Any section that was actually | |
4702 | installed in the BFD, and has type SHT_REL or SHT_RELA, and uses | |
4703 | the dynamic symbol table, is considered to be a dynamic reloc | |
4704 | section. */ | |
4705 | ||
4706 | long | |
4707 | _bfd_elf_canonicalize_dynamic_reloc (abfd, storage, syms) | |
4708 | bfd *abfd; | |
4709 | arelent **storage; | |
4710 | asymbol **syms; | |
4711 | { | |
4712 | boolean (*slurp_relocs) PARAMS ((bfd *, asection *, asymbol **, boolean)); | |
4713 | asection *s; | |
4714 | long ret; | |
4715 | ||
4716 | if (elf_dynsymtab (abfd) == 0) | |
4717 | { | |
4718 | bfd_set_error (bfd_error_invalid_operation); | |
4719 | return -1; | |
4720 | } | |
4721 | ||
4722 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; | |
4723 | ret = 0; | |
4724 | for (s = abfd->sections; s != NULL; s = s->next) | |
4725 | { | |
4726 | if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd) | |
4727 | && (elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
4728 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA)) | |
4729 | { | |
4730 | arelent *p; | |
4731 | long count, i; | |
4732 | ||
4733 | if (! (*slurp_relocs) (abfd, s, syms, true)) | |
4734 | return -1; | |
4735 | count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize; | |
4736 | p = s->relocation; | |
4737 | for (i = 0; i < count; i++) | |
4738 | *storage++ = p++; | |
4739 | ret += count; | |
4740 | } | |
4741 | } | |
4742 | ||
4743 | *storage = NULL; | |
4744 | ||
4745 | return ret; | |
4746 | } | |
4747 | \f | |
4748 | /* Read in the version information. */ | |
4749 | ||
4750 | boolean | |
4751 | _bfd_elf_slurp_version_tables (abfd) | |
4752 | bfd *abfd; | |
4753 | { | |
4754 | bfd_byte *contents = NULL; | |
4755 | ||
4756 | if (elf_dynverdef (abfd) != 0) | |
4757 | { | |
4758 | Elf_Internal_Shdr *hdr; | |
4759 | Elf_External_Verdef *everdef; | |
4760 | Elf_Internal_Verdef *iverdef; | |
4761 | Elf_Internal_Verdef *iverdefarr; | |
4762 | Elf_Internal_Verdef iverdefmem; | |
4763 | unsigned int i; | |
4764 | unsigned int maxidx; | |
4765 | ||
4766 | hdr = &elf_tdata (abfd)->dynverdef_hdr; | |
4767 | ||
4768 | contents = (bfd_byte *) bfd_malloc (hdr->sh_size); | |
4769 | if (contents == NULL) | |
4770 | goto error_return; | |
4771 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0 | |
4772 | || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size) | |
4773 | goto error_return; | |
4774 | ||
4775 | /* We know the number of entries in the section but not the maximum | |
4776 | index. Therefore we have to run through all entries and find | |
4777 | the maximum. */ | |
4778 | everdef = (Elf_External_Verdef *) contents; | |
4779 | maxidx = 0; | |
4780 | for (i = 0; i < hdr->sh_info; ++i) | |
4781 | { | |
4782 | _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem); | |
4783 | ||
4784 | if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx) | |
4785 | maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION); | |
4786 | ||
4787 | everdef = ((Elf_External_Verdef *) | |
4788 | ((bfd_byte *) everdef + iverdefmem.vd_next)); | |
4789 | } | |
4790 | ||
4791 | elf_tdata (abfd)->verdef = | |
4792 | ((Elf_Internal_Verdef *) | |
4793 | bfd_zalloc (abfd, maxidx * sizeof (Elf_Internal_Verdef))); | |
4794 | if (elf_tdata (abfd)->verdef == NULL) | |
4795 | goto error_return; | |
4796 | ||
4797 | elf_tdata (abfd)->cverdefs = maxidx; | |
4798 | ||
4799 | everdef = (Elf_External_Verdef *) contents; | |
4800 | iverdefarr = elf_tdata (abfd)->verdef; | |
4801 | for (i = 0; i < hdr->sh_info; i++) | |
4802 | { | |
4803 | Elf_External_Verdaux *everdaux; | |
4804 | Elf_Internal_Verdaux *iverdaux; | |
4805 | unsigned int j; | |
4806 | ||
4807 | _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem); | |
4808 | ||
4809 | iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1]; | |
4810 | memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef)); | |
4811 | ||
4812 | iverdef->vd_bfd = abfd; | |
4813 | ||
4814 | iverdef->vd_auxptr = ((Elf_Internal_Verdaux *) | |
4815 | bfd_alloc (abfd, | |
4816 | (iverdef->vd_cnt | |
4817 | * sizeof (Elf_Internal_Verdaux)))); | |
4818 | if (iverdef->vd_auxptr == NULL) | |
4819 | goto error_return; | |
4820 | ||
4821 | everdaux = ((Elf_External_Verdaux *) | |
4822 | ((bfd_byte *) everdef + iverdef->vd_aux)); | |
4823 | iverdaux = iverdef->vd_auxptr; | |
4824 | for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++) | |
4825 | { | |
4826 | _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux); | |
4827 | ||
4828 | iverdaux->vda_nodename = | |
4829 | bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
4830 | iverdaux->vda_name); | |
4831 | if (iverdaux->vda_nodename == NULL) | |
4832 | goto error_return; | |
4833 | ||
4834 | if (j + 1 < iverdef->vd_cnt) | |
4835 | iverdaux->vda_nextptr = iverdaux + 1; | |
4836 | else | |
4837 | iverdaux->vda_nextptr = NULL; | |
4838 | ||
4839 | everdaux = ((Elf_External_Verdaux *) | |
4840 | ((bfd_byte *) everdaux + iverdaux->vda_next)); | |
4841 | } | |
4842 | ||
4843 | iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename; | |
4844 | ||
4845 | if (i + 1 < hdr->sh_info) | |
4846 | iverdef->vd_nextdef = iverdef + 1; | |
4847 | else | |
4848 | iverdef->vd_nextdef = NULL; | |
4849 | ||
4850 | everdef = ((Elf_External_Verdef *) | |
4851 | ((bfd_byte *) everdef + iverdef->vd_next)); | |
4852 | } | |
4853 | ||
4854 | free (contents); | |
4855 | contents = NULL; | |
4856 | } | |
4857 | ||
4858 | if (elf_dynverref (abfd) != 0) | |
4859 | { | |
4860 | Elf_Internal_Shdr *hdr; | |
4861 | Elf_External_Verneed *everneed; | |
4862 | Elf_Internal_Verneed *iverneed; | |
4863 | unsigned int i; | |
4864 | ||
4865 | hdr = &elf_tdata (abfd)->dynverref_hdr; | |
4866 | ||
4867 | elf_tdata (abfd)->verref = | |
4868 | ((Elf_Internal_Verneed *) | |
4869 | bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verneed))); | |
4870 | if (elf_tdata (abfd)->verref == NULL) | |
4871 | goto error_return; | |
4872 | ||
4873 | elf_tdata (abfd)->cverrefs = hdr->sh_info; | |
4874 | ||
4875 | contents = (bfd_byte *) bfd_malloc (hdr->sh_size); | |
4876 | if (contents == NULL) | |
4877 | goto error_return; | |
4878 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0 | |
4879 | || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size) | |
4880 | goto error_return; | |
4881 | ||
4882 | everneed = (Elf_External_Verneed *) contents; | |
4883 | iverneed = elf_tdata (abfd)->verref; | |
4884 | for (i = 0; i < hdr->sh_info; i++, iverneed++) | |
4885 | { | |
4886 | Elf_External_Vernaux *evernaux; | |
4887 | Elf_Internal_Vernaux *ivernaux; | |
4888 | unsigned int j; | |
4889 | ||
4890 | _bfd_elf_swap_verneed_in (abfd, everneed, iverneed); | |
4891 | ||
4892 | iverneed->vn_bfd = abfd; | |
4893 | ||
4894 | iverneed->vn_filename = | |
4895 | bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
4896 | iverneed->vn_file); | |
4897 | if (iverneed->vn_filename == NULL) | |
4898 | goto error_return; | |
4899 | ||
4900 | iverneed->vn_auxptr = | |
4901 | ((Elf_Internal_Vernaux *) | |
4902 | bfd_alloc (abfd, | |
4903 | iverneed->vn_cnt * sizeof (Elf_Internal_Vernaux))); | |
4904 | ||
4905 | evernaux = ((Elf_External_Vernaux *) | |
4906 | ((bfd_byte *) everneed + iverneed->vn_aux)); | |
4907 | ivernaux = iverneed->vn_auxptr; | |
4908 | for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++) | |
4909 | { | |
4910 | _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux); | |
4911 | ||
4912 | ivernaux->vna_nodename = | |
4913 | bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
4914 | ivernaux->vna_name); | |
4915 | if (ivernaux->vna_nodename == NULL) | |
4916 | goto error_return; | |
4917 | ||
4918 | if (j + 1 < iverneed->vn_cnt) | |
4919 | ivernaux->vna_nextptr = ivernaux + 1; | |
4920 | else | |
4921 | ivernaux->vna_nextptr = NULL; | |
4922 | ||
4923 | evernaux = ((Elf_External_Vernaux *) | |
4924 | ((bfd_byte *) evernaux + ivernaux->vna_next)); | |
4925 | } | |
4926 | ||
4927 | if (i + 1 < hdr->sh_info) | |
4928 | iverneed->vn_nextref = iverneed + 1; | |
4929 | else | |
4930 | iverneed->vn_nextref = NULL; | |
4931 | ||
4932 | everneed = ((Elf_External_Verneed *) | |
4933 | ((bfd_byte *) everneed + iverneed->vn_next)); | |
4934 | } | |
4935 | ||
4936 | free (contents); | |
4937 | contents = NULL; | |
4938 | } | |
4939 | ||
4940 | return true; | |
4941 | ||
4942 | error_return: | |
4943 | if (contents == NULL) | |
4944 | free (contents); | |
4945 | return false; | |
4946 | } | |
4947 | \f | |
4948 | asymbol * | |
4949 | _bfd_elf_make_empty_symbol (abfd) | |
4950 | bfd *abfd; | |
4951 | { | |
4952 | elf_symbol_type *newsym; | |
4953 | ||
4954 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); | |
4955 | if (!newsym) | |
4956 | return NULL; | |
4957 | else | |
4958 | { | |
4959 | newsym->symbol.the_bfd = abfd; | |
4960 | return &newsym->symbol; | |
4961 | } | |
4962 | } | |
4963 | ||
4964 | void | |
4965 | _bfd_elf_get_symbol_info (ignore_abfd, symbol, ret) | |
4966 | bfd *ignore_abfd ATTRIBUTE_UNUSED; | |
4967 | asymbol *symbol; | |
4968 | symbol_info *ret; | |
4969 | { | |
4970 | bfd_symbol_info (symbol, ret); | |
4971 | } | |
4972 | ||
4973 | /* Return whether a symbol name implies a local symbol. Most targets | |
4974 | use this function for the is_local_label_name entry point, but some | |
4975 | override it. */ | |
4976 | ||
4977 | boolean | |
4978 | _bfd_elf_is_local_label_name (abfd, name) | |
4979 | bfd *abfd ATTRIBUTE_UNUSED; | |
4980 | const char *name; | |
4981 | { | |
4982 | /* Normal local symbols start with ``.L''. */ | |
4983 | if (name[0] == '.' && name[1] == 'L') | |
4984 | return true; | |
4985 | ||
4986 | /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate | |
4987 | DWARF debugging symbols starting with ``..''. */ | |
4988 | if (name[0] == '.' && name[1] == '.') | |
4989 | return true; | |
4990 | ||
4991 | /* gcc will sometimes generate symbols beginning with ``_.L_'' when | |
4992 | emitting DWARF debugging output. I suspect this is actually a | |
4993 | small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call | |
4994 | ASM_GENERATE_INTERNAL_LABEL, and this causes the leading | |
4995 | underscore to be emitted on some ELF targets). For ease of use, | |
4996 | we treat such symbols as local. */ | |
4997 | if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_') | |
4998 | return true; | |
4999 | ||
5000 | return false; | |
5001 | } | |
5002 | ||
5003 | alent * | |
5004 | _bfd_elf_get_lineno (ignore_abfd, symbol) | |
5005 | bfd *ignore_abfd ATTRIBUTE_UNUSED; | |
5006 | asymbol *symbol ATTRIBUTE_UNUSED; | |
5007 | { | |
5008 | abort (); | |
5009 | return NULL; | |
5010 | } | |
5011 | ||
5012 | boolean | |
5013 | _bfd_elf_set_arch_mach (abfd, arch, machine) | |
5014 | bfd *abfd; | |
5015 | enum bfd_architecture arch; | |
5016 | unsigned long machine; | |
5017 | { | |
5018 | /* If this isn't the right architecture for this backend, and this | |
5019 | isn't the generic backend, fail. */ | |
5020 | if (arch != get_elf_backend_data (abfd)->arch | |
5021 | && arch != bfd_arch_unknown | |
5022 | && get_elf_backend_data (abfd)->arch != bfd_arch_unknown) | |
5023 | return false; | |
5024 | ||
5025 | return bfd_default_set_arch_mach (abfd, arch, machine); | |
5026 | } | |
5027 | ||
5028 | /* Find the function to a particular section and offset, | |
5029 | for error reporting. */ | |
5030 | ||
5031 | static boolean | |
5032 | elf_find_function (abfd, section, symbols, offset, | |
5033 | filename_ptr, functionname_ptr) | |
5034 | bfd *abfd ATTRIBUTE_UNUSED; | |
5035 | asection *section; | |
5036 | asymbol **symbols; | |
5037 | bfd_vma offset; | |
5038 | const char **filename_ptr; | |
5039 | const char **functionname_ptr; | |
5040 | { | |
5041 | const char *filename; | |
5042 | asymbol *func; | |
5043 | bfd_vma low_func; | |
5044 | asymbol **p; | |
5045 | ||
5046 | filename = NULL; | |
5047 | func = NULL; | |
5048 | low_func = 0; | |
5049 | ||
5050 | for (p = symbols; *p != NULL; p++) | |
5051 | { | |
5052 | elf_symbol_type *q; | |
5053 | ||
5054 | q = (elf_symbol_type *) *p; | |
5055 | ||
5056 | if (bfd_get_section (&q->symbol) != section) | |
5057 | continue; | |
5058 | ||
5059 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) | |
5060 | { | |
5061 | default: | |
5062 | break; | |
5063 | case STT_FILE: | |
5064 | filename = bfd_asymbol_name (&q->symbol); | |
5065 | break; | |
5066 | case STT_NOTYPE: | |
5067 | case STT_FUNC: | |
5068 | if (q->symbol.section == section | |
5069 | && q->symbol.value >= low_func | |
5070 | && q->symbol.value <= offset) | |
5071 | { | |
5072 | func = (asymbol *) q; | |
5073 | low_func = q->symbol.value; | |
5074 | } | |
5075 | break; | |
5076 | } | |
5077 | } | |
5078 | ||
5079 | if (func == NULL) | |
5080 | return false; | |
5081 | ||
5082 | if (filename_ptr) | |
5083 | *filename_ptr = filename; | |
5084 | if (functionname_ptr) | |
5085 | *functionname_ptr = bfd_asymbol_name (func); | |
5086 | ||
5087 | return true; | |
5088 | } | |
5089 | ||
5090 | /* Find the nearest line to a particular section and offset, | |
5091 | for error reporting. */ | |
5092 | ||
5093 | boolean | |
5094 | _bfd_elf_find_nearest_line (abfd, section, symbols, offset, | |
5095 | filename_ptr, functionname_ptr, line_ptr) | |
5096 | bfd *abfd; | |
5097 | asection *section; | |
5098 | asymbol **symbols; | |
5099 | bfd_vma offset; | |
5100 | const char **filename_ptr; | |
5101 | const char **functionname_ptr; | |
5102 | unsigned int *line_ptr; | |
5103 | { | |
5104 | boolean found; | |
5105 | ||
5106 | if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset, | |
5107 | filename_ptr, functionname_ptr, | |
5108 | line_ptr)) | |
5109 | { | |
5110 | if (!*functionname_ptr) | |
5111 | elf_find_function (abfd, section, symbols, offset, | |
5112 | *filename_ptr ? NULL : filename_ptr, | |
5113 | functionname_ptr); | |
5114 | ||
5115 | return true; | |
5116 | } | |
5117 | ||
5118 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, | |
5119 | filename_ptr, functionname_ptr, | |
5120 | line_ptr, 0, | |
5121 | &elf_tdata (abfd)->dwarf2_find_line_info)) | |
5122 | { | |
5123 | if (!*functionname_ptr) | |
5124 | elf_find_function (abfd, section, symbols, offset, | |
5125 | *filename_ptr ? NULL : filename_ptr, | |
5126 | functionname_ptr); | |
5127 | ||
5128 | return true; | |
5129 | } | |
5130 | ||
5131 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, | |
5132 | &found, filename_ptr, | |
5133 | functionname_ptr, line_ptr, | |
5134 | &elf_tdata (abfd)->line_info)) | |
5135 | return false; | |
5136 | if (found) | |
5137 | return true; | |
5138 | ||
5139 | if (symbols == NULL) | |
5140 | return false; | |
5141 | ||
5142 | if (! elf_find_function (abfd, section, symbols, offset, | |
5143 | filename_ptr, functionname_ptr)) | |
5144 | return false; | |
5145 | ||
5146 | *line_ptr = 0; | |
5147 | return true; | |
5148 | } | |
5149 | ||
5150 | int | |
5151 | _bfd_elf_sizeof_headers (abfd, reloc) | |
5152 | bfd *abfd; | |
5153 | boolean reloc; | |
5154 | { | |
5155 | int ret; | |
5156 | ||
5157 | ret = get_elf_backend_data (abfd)->s->sizeof_ehdr; | |
5158 | if (! reloc) | |
5159 | ret += get_program_header_size (abfd); | |
5160 | return ret; | |
5161 | } | |
5162 | ||
5163 | boolean | |
5164 | _bfd_elf_set_section_contents (abfd, section, location, offset, count) | |
5165 | bfd *abfd; | |
5166 | sec_ptr section; | |
5167 | PTR location; | |
5168 | file_ptr offset; | |
5169 | bfd_size_type count; | |
5170 | { | |
5171 | Elf_Internal_Shdr *hdr; | |
5172 | ||
5173 | if (! abfd->output_has_begun | |
5174 | && ! _bfd_elf_compute_section_file_positions | |
5175 | (abfd, (struct bfd_link_info *) NULL)) | |
5176 | return false; | |
5177 | ||
5178 | hdr = &elf_section_data (section)->this_hdr; | |
5179 | ||
5180 | if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) | |
5181 | return false; | |
5182 | if (bfd_write (location, 1, count, abfd) != count) | |
5183 | return false; | |
5184 | ||
5185 | return true; | |
5186 | } | |
5187 | ||
5188 | void | |
5189 | _bfd_elf_no_info_to_howto (abfd, cache_ptr, dst) | |
5190 | bfd *abfd ATTRIBUTE_UNUSED; | |
5191 | arelent *cache_ptr ATTRIBUTE_UNUSED; | |
5192 | Elf_Internal_Rela *dst ATTRIBUTE_UNUSED; | |
5193 | { | |
5194 | abort (); | |
5195 | } | |
5196 | ||
5197 | #if 0 | |
5198 | void | |
5199 | _bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst) | |
5200 | bfd *abfd; | |
5201 | arelent *cache_ptr; | |
5202 | Elf_Internal_Rel *dst; | |
5203 | { | |
5204 | abort (); | |
5205 | } | |
5206 | #endif | |
5207 | ||
5208 | /* Try to convert a non-ELF reloc into an ELF one. */ | |
5209 | ||
5210 | boolean | |
5211 | _bfd_elf_validate_reloc (abfd, areloc) | |
5212 | bfd *abfd; | |
5213 | arelent *areloc; | |
5214 | { | |
5215 | /* Check whether we really have an ELF howto. */ | |
5216 | ||
5217 | if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec) | |
5218 | { | |
5219 | bfd_reloc_code_real_type code; | |
5220 | reloc_howto_type *howto; | |
5221 | ||
5222 | /* Alien reloc: Try to determine its type to replace it with an | |
5223 | equivalent ELF reloc. */ | |
5224 | ||
5225 | if (areloc->howto->pc_relative) | |
5226 | { | |
5227 | switch (areloc->howto->bitsize) | |
5228 | { | |
5229 | case 8: | |
5230 | code = BFD_RELOC_8_PCREL; | |
5231 | break; | |
5232 | case 12: | |
5233 | code = BFD_RELOC_12_PCREL; | |
5234 | break; | |
5235 | case 16: | |
5236 | code = BFD_RELOC_16_PCREL; | |
5237 | break; | |
5238 | case 24: | |
5239 | code = BFD_RELOC_24_PCREL; | |
5240 | break; | |
5241 | case 32: | |
5242 | code = BFD_RELOC_32_PCREL; | |
5243 | break; | |
5244 | case 64: | |
5245 | code = BFD_RELOC_64_PCREL; | |
5246 | break; | |
5247 | default: | |
5248 | goto fail; | |
5249 | } | |
5250 | ||
5251 | howto = bfd_reloc_type_lookup (abfd, code); | |
5252 | ||
5253 | if (areloc->howto->pcrel_offset != howto->pcrel_offset) | |
5254 | { | |
5255 | if (howto->pcrel_offset) | |
5256 | areloc->addend += areloc->address; | |
5257 | else | |
5258 | areloc->addend -= areloc->address; /* addend is unsigned!! */ | |
5259 | } | |
5260 | } | |
5261 | else | |
5262 | { | |
5263 | switch (areloc->howto->bitsize) | |
5264 | { | |
5265 | case 8: | |
5266 | code = BFD_RELOC_8; | |
5267 | break; | |
5268 | case 14: | |
5269 | code = BFD_RELOC_14; | |
5270 | break; | |
5271 | case 16: | |
5272 | code = BFD_RELOC_16; | |
5273 | break; | |
5274 | case 26: | |
5275 | code = BFD_RELOC_26; | |
5276 | break; | |
5277 | case 32: | |
5278 | code = BFD_RELOC_32; | |
5279 | break; | |
5280 | case 64: | |
5281 | code = BFD_RELOC_64; | |
5282 | break; | |
5283 | default: | |
5284 | goto fail; | |
5285 | } | |
5286 | ||
5287 | howto = bfd_reloc_type_lookup (abfd, code); | |
5288 | } | |
5289 | ||
5290 | if (howto) | |
5291 | areloc->howto = howto; | |
5292 | else | |
5293 | goto fail; | |
5294 | } | |
5295 | ||
5296 | return true; | |
5297 | ||
5298 | fail: | |
5299 | (*_bfd_error_handler) | |
5300 | (_("%s: unsupported relocation type %s"), | |
5301 | bfd_get_filename (abfd), areloc->howto->name); | |
5302 | bfd_set_error (bfd_error_bad_value); | |
5303 | return false; | |
5304 | } | |
5305 | ||
5306 | boolean | |
5307 | _bfd_elf_close_and_cleanup (abfd) | |
5308 | bfd *abfd; | |
5309 | { | |
5310 | if (bfd_get_format (abfd) == bfd_object) | |
5311 | { | |
5312 | if (elf_shstrtab (abfd) != NULL) | |
5313 | _bfd_stringtab_free (elf_shstrtab (abfd)); | |
5314 | } | |
5315 | ||
5316 | return _bfd_generic_close_and_cleanup (abfd); | |
5317 | } | |
5318 | ||
5319 | /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY | |
5320 | in the relocation's offset. Thus we cannot allow any sort of sanity | |
5321 | range-checking to interfere. There is nothing else to do in processing | |
5322 | this reloc. */ | |
5323 | ||
5324 | bfd_reloc_status_type | |
5325 | _bfd_elf_rel_vtable_reloc_fn (abfd, re, symbol, data, is, obfd, errmsg) | |
5326 | bfd *abfd ATTRIBUTE_UNUSED; | |
5327 | arelent *re ATTRIBUTE_UNUSED; | |
5328 | struct symbol_cache_entry *symbol ATTRIBUTE_UNUSED; | |
5329 | PTR data ATTRIBUTE_UNUSED; | |
5330 | asection *is ATTRIBUTE_UNUSED; | |
5331 | bfd *obfd ATTRIBUTE_UNUSED; | |
5332 | char **errmsg ATTRIBUTE_UNUSED; | |
5333 | { | |
5334 | return bfd_reloc_ok; | |
5335 | } | |
5336 | \f | |
5337 | /* Elf core file support. Much of this only works on native | |
5338 | toolchains, since we rely on knowing the | |
5339 | machine-dependent procfs structure in order to pick | |
5340 | out details about the corefile. */ | |
5341 | ||
5342 | #ifdef HAVE_SYS_PROCFS_H | |
5343 | # include <sys/procfs.h> | |
5344 | #endif | |
5345 | ||
5346 | /* Define offsetof for those systems which lack it. */ | |
5347 | ||
5348 | #ifndef offsetof | |
5349 | # define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) | |
5350 | #endif | |
5351 | ||
5352 | /* FIXME: this is kinda wrong, but it's what gdb wants. */ | |
5353 | ||
5354 | static int | |
5355 | elfcore_make_pid (abfd) | |
5356 | bfd *abfd; | |
5357 | { | |
5358 | return ((elf_tdata (abfd)->core_lwpid << 16) | |
5359 | + (elf_tdata (abfd)->core_pid)); | |
5360 | } | |
5361 | ||
5362 | /* If there isn't a section called NAME, make one, using | |
5363 | data from SECT. Note, this function will generate a | |
5364 | reference to NAME, so you shouldn't deallocate or | |
5365 | overwrite it. */ | |
5366 | ||
5367 | static boolean | |
5368 | elfcore_maybe_make_sect (abfd, name, sect) | |
5369 | bfd *abfd; | |
5370 | char *name; | |
5371 | asection *sect; | |
5372 | { | |
5373 | asection *sect2; | |
5374 | ||
5375 | if (bfd_get_section_by_name (abfd, name) != NULL) | |
5376 | return true; | |
5377 | ||
5378 | sect2 = bfd_make_section (abfd, name); | |
5379 | if (sect2 == NULL) | |
5380 | return false; | |
5381 | ||
5382 | sect2->_raw_size = sect->_raw_size; | |
5383 | sect2->filepos = sect->filepos; | |
5384 | sect2->flags = sect->flags; | |
5385 | sect2->alignment_power = sect->alignment_power; | |
5386 | return true; | |
5387 | } | |
5388 | ||
5389 | /* Create a pseudosection containing SIZE bytes at FILEPOS. This | |
5390 | actually creates up to two pseudosections: | |
5391 | - For the single-threaded case, a section named NAME, unless | |
5392 | such a section already exists. | |
5393 | - For the multi-threaded case, a section named "NAME/PID", where | |
5394 | PID is elfcore_make_pid (abfd). | |
5395 | Both pseudosections have identical contents. */ | |
5396 | boolean | |
5397 | _bfd_elfcore_make_pseudosection (abfd, name, size, filepos) | |
5398 | bfd *abfd; | |
5399 | char *name; | |
5400 | int size; | |
5401 | int filepos; | |
5402 | { | |
5403 | char buf[100]; | |
5404 | char *threaded_name; | |
5405 | asection *sect; | |
5406 | ||
5407 | /* Build the section name. */ | |
5408 | ||
5409 | sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd)); | |
5410 | threaded_name = bfd_alloc (abfd, strlen (buf) + 1); | |
5411 | if (threaded_name == NULL) | |
5412 | return false; | |
5413 | strcpy (threaded_name, buf); | |
5414 | ||
5415 | sect = bfd_make_section (abfd, threaded_name); | |
5416 | if (sect == NULL) | |
5417 | return false; | |
5418 | sect->_raw_size = size; | |
5419 | sect->filepos = filepos; | |
5420 | sect->flags = SEC_HAS_CONTENTS; | |
5421 | sect->alignment_power = 2; | |
5422 | ||
5423 | return elfcore_maybe_make_sect (abfd, name, sect); | |
5424 | } | |
5425 | ||
5426 | /* prstatus_t exists on: | |
5427 | solaris 2.5+ | |
5428 | linux 2.[01] + glibc | |
5429 | unixware 4.2 | |
5430 | */ | |
5431 | ||
5432 | #if defined (HAVE_PRSTATUS_T) | |
5433 | static boolean elfcore_grok_prstatus PARAMS ((bfd *, Elf_Internal_Note *)); | |
5434 | ||
5435 | static boolean | |
5436 | elfcore_grok_prstatus (abfd, note) | |
5437 | bfd *abfd; | |
5438 | Elf_Internal_Note *note; | |
5439 | { | |
5440 | int raw_size; | |
5441 | int offset; | |
5442 | ||
5443 | if (note->descsz == sizeof (prstatus_t)) | |
5444 | { | |
5445 | prstatus_t prstat; | |
5446 | ||
5447 | raw_size = sizeof (prstat.pr_reg); | |
5448 | offset = offsetof (prstatus_t, pr_reg); | |
5449 | memcpy (&prstat, note->descdata, sizeof (prstat)); | |
5450 | ||
5451 | elf_tdata (abfd)->core_signal = prstat.pr_cursig; | |
5452 | elf_tdata (abfd)->core_pid = prstat.pr_pid; | |
5453 | ||
5454 | /* pr_who exists on: | |
5455 | solaris 2.5+ | |
5456 | unixware 4.2 | |
5457 | pr_who doesn't exist on: | |
5458 | linux 2.[01] | |
5459 | */ | |
5460 | #if defined (HAVE_PRSTATUS_T_PR_WHO) | |
5461 | elf_tdata (abfd)->core_lwpid = prstat.pr_who; | |
5462 | #endif | |
5463 | } | |
5464 | #if defined (HAVE_PRSTATUS32_T) | |
5465 | else if (note->descsz == sizeof (prstatus32_t)) | |
5466 | { | |
5467 | /* 64-bit host, 32-bit corefile */ | |
5468 | prstatus32_t prstat; | |
5469 | ||
5470 | raw_size = sizeof (prstat.pr_reg); | |
5471 | offset = offsetof (prstatus32_t, pr_reg); | |
5472 | memcpy (&prstat, note->descdata, sizeof (prstat)); | |
5473 | ||
5474 | elf_tdata (abfd)->core_signal = prstat.pr_cursig; | |
5475 | elf_tdata (abfd)->core_pid = prstat.pr_pid; | |
5476 | ||
5477 | /* pr_who exists on: | |
5478 | solaris 2.5+ | |
5479 | unixware 4.2 | |
5480 | pr_who doesn't exist on: | |
5481 | linux 2.[01] | |
5482 | */ | |
5483 | #if defined (HAVE_PRSTATUS32_T_PR_WHO) | |
5484 | elf_tdata (abfd)->core_lwpid = prstat.pr_who; | |
5485 | #endif | |
5486 | } | |
5487 | #endif /* HAVE_PRSTATUS32_T */ | |
5488 | else | |
5489 | { | |
5490 | /* Fail - we don't know how to handle any other | |
5491 | note size (ie. data object type). */ | |
5492 | return true; | |
5493 | } | |
5494 | ||
5495 | /* Make a ".reg/999" section and a ".reg" section. */ | |
5496 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
5497 | raw_size, note->descpos + offset); | |
5498 | } | |
5499 | #endif /* defined (HAVE_PRSTATUS_T) */ | |
5500 | ||
5501 | /* Create a pseudosection containing the exact contents of NOTE. */ | |
5502 | static boolean | |
5503 | elfcore_make_note_pseudosection (abfd, name, note) | |
5504 | bfd *abfd; | |
5505 | char *name; | |
5506 | Elf_Internal_Note *note; | |
5507 | { | |
5508 | return _bfd_elfcore_make_pseudosection (abfd, name, | |
5509 | note->descsz, note->descpos); | |
5510 | } | |
5511 | ||
5512 | /* There isn't a consistent prfpregset_t across platforms, | |
5513 | but it doesn't matter, because we don't have to pick this | |
5514 | data structure apart. */ | |
5515 | ||
5516 | static boolean | |
5517 | elfcore_grok_prfpreg (abfd, note) | |
5518 | bfd *abfd; | |
5519 | Elf_Internal_Note *note; | |
5520 | { | |
5521 | return elfcore_make_note_pseudosection (abfd, ".reg2", note); | |
5522 | } | |
5523 | ||
5524 | /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note | |
5525 | type of 5 (NT_PRXFPREG). Just include the whole note's contents | |
5526 | literally. */ | |
5527 | ||
5528 | static boolean | |
5529 | elfcore_grok_prxfpreg (abfd, note) | |
5530 | bfd *abfd; | |
5531 | Elf_Internal_Note *note; | |
5532 | { | |
5533 | return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note); | |
5534 | } | |
5535 | ||
5536 | #if defined (HAVE_PRPSINFO_T) | |
5537 | typedef prpsinfo_t elfcore_psinfo_t; | |
5538 | #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */ | |
5539 | typedef prpsinfo32_t elfcore_psinfo32_t; | |
5540 | #endif | |
5541 | #endif | |
5542 | ||
5543 | #if defined (HAVE_PSINFO_T) | |
5544 | typedef psinfo_t elfcore_psinfo_t; | |
5545 | #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */ | |
5546 | typedef psinfo32_t elfcore_psinfo32_t; | |
5547 | #endif | |
5548 | #endif | |
5549 | ||
5550 | /* return a malloc'ed copy of a string at START which is at | |
5551 | most MAX bytes long, possibly without a terminating '\0'. | |
5552 | the copy will always have a terminating '\0'. */ | |
5553 | ||
5554 | char * | |
5555 | _bfd_elfcore_strndup (abfd, start, max) | |
5556 | bfd *abfd; | |
5557 | char *start; | |
5558 | int max; | |
5559 | { | |
5560 | char *dup; | |
5561 | char *end = memchr (start, '\0', max); | |
5562 | int len; | |
5563 | ||
5564 | if (end == NULL) | |
5565 | len = max; | |
5566 | else | |
5567 | len = end - start; | |
5568 | ||
5569 | dup = bfd_alloc (abfd, len + 1); | |
5570 | if (dup == NULL) | |
5571 | return NULL; | |
5572 | ||
5573 | memcpy (dup, start, len); | |
5574 | dup[len] = '\0'; | |
5575 | ||
5576 | return dup; | |
5577 | } | |
5578 | ||
5579 | #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) | |
5580 | static boolean elfcore_grok_psinfo PARAMS ((bfd *, Elf_Internal_Note *)); | |
5581 | ||
5582 | static boolean | |
5583 | elfcore_grok_psinfo (abfd, note) | |
5584 | bfd *abfd; | |
5585 | Elf_Internal_Note *note; | |
5586 | { | |
5587 | if (note->descsz == sizeof (elfcore_psinfo_t)) | |
5588 | { | |
5589 | elfcore_psinfo_t psinfo; | |
5590 | ||
5591 | memcpy (&psinfo, note->descdata, sizeof (psinfo)); | |
5592 | ||
5593 | elf_tdata (abfd)->core_program | |
5594 | = _bfd_elfcore_strndup (abfd, psinfo.pr_fname, | |
5595 | sizeof (psinfo.pr_fname)); | |
5596 | ||
5597 | elf_tdata (abfd)->core_command | |
5598 | = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs, | |
5599 | sizeof (psinfo.pr_psargs)); | |
5600 | } | |
5601 | #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T) | |
5602 | else if (note->descsz == sizeof (elfcore_psinfo32_t)) | |
5603 | { | |
5604 | /* 64-bit host, 32-bit corefile */ | |
5605 | elfcore_psinfo32_t psinfo; | |
5606 | ||
5607 | memcpy (&psinfo, note->descdata, sizeof (psinfo)); | |
5608 | ||
5609 | elf_tdata (abfd)->core_program | |
5610 | = _bfd_elfcore_strndup (abfd, psinfo.pr_fname, | |
5611 | sizeof (psinfo.pr_fname)); | |
5612 | ||
5613 | elf_tdata (abfd)->core_command | |
5614 | = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs, | |
5615 | sizeof (psinfo.pr_psargs)); | |
5616 | } | |
5617 | #endif | |
5618 | ||
5619 | else | |
5620 | { | |
5621 | /* Fail - we don't know how to handle any other | |
5622 | note size (ie. data object type). */ | |
5623 | return true; | |
5624 | } | |
5625 | ||
5626 | /* Note that for some reason, a spurious space is tacked | |
5627 | onto the end of the args in some (at least one anyway) | |
5628 | implementations, so strip it off if it exists. */ | |
5629 | ||
5630 | { | |
5631 | char *command = elf_tdata (abfd)->core_command; | |
5632 | int n = strlen (command); | |
5633 | ||
5634 | if (0 < n && command[n - 1] == ' ') | |
5635 | command[n - 1] = '\0'; | |
5636 | } | |
5637 | ||
5638 | return true; | |
5639 | } | |
5640 | #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */ | |
5641 | ||
5642 | #if defined (HAVE_PSTATUS_T) | |
5643 | static boolean | |
5644 | elfcore_grok_pstatus (abfd, note) | |
5645 | bfd *abfd; | |
5646 | Elf_Internal_Note *note; | |
5647 | { | |
5648 | if (note->descsz == sizeof (pstatus_t) | |
5649 | #if defined (HAVE_PXSTATUS_T) | |
5650 | || note->descsz == sizeof (pxstatus_t) | |
5651 | #endif | |
5652 | ) | |
5653 | { | |
5654 | pstatus_t pstat; | |
5655 | ||
5656 | memcpy (&pstat, note->descdata, sizeof (pstat)); | |
5657 | ||
5658 | elf_tdata (abfd)->core_pid = pstat.pr_pid; | |
5659 | } | |
5660 | #if defined (HAVE_PSTATUS32_T) | |
5661 | else if (note->descsz == sizeof (pstatus32_t)) | |
5662 | { | |
5663 | /* 64-bit host, 32-bit corefile */ | |
5664 | pstatus32_t pstat; | |
5665 | ||
5666 | memcpy (&pstat, note->descdata, sizeof (pstat)); | |
5667 | ||
5668 | elf_tdata (abfd)->core_pid = pstat.pr_pid; | |
5669 | } | |
5670 | #endif | |
5671 | /* Could grab some more details from the "representative" | |
5672 | lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an | |
5673 | NT_LWPSTATUS note, presumably. */ | |
5674 | ||
5675 | return true; | |
5676 | } | |
5677 | #endif /* defined (HAVE_PSTATUS_T) */ | |
5678 | ||
5679 | #if defined (HAVE_LWPSTATUS_T) | |
5680 | static boolean | |
5681 | elfcore_grok_lwpstatus (abfd, note) | |
5682 | bfd *abfd; | |
5683 | Elf_Internal_Note *note; | |
5684 | { | |
5685 | lwpstatus_t lwpstat; | |
5686 | char buf[100]; | |
5687 | char *name; | |
5688 | asection *sect; | |
5689 | ||
5690 | if (note->descsz != sizeof (lwpstat) | |
5691 | #if defined (HAVE_LWPXSTATUS_T) | |
5692 | && note->descsz != sizeof (lwpxstatus_t) | |
5693 | #endif | |
5694 | ) | |
5695 | return true; | |
5696 | ||
5697 | memcpy (&lwpstat, note->descdata, sizeof (lwpstat)); | |
5698 | ||
5699 | elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid; | |
5700 | elf_tdata (abfd)->core_signal = lwpstat.pr_cursig; | |
5701 | ||
5702 | /* Make a ".reg/999" section. */ | |
5703 | ||
5704 | sprintf (buf, ".reg/%d", elfcore_make_pid (abfd)); | |
5705 | name = bfd_alloc (abfd, strlen (buf) + 1); | |
5706 | if (name == NULL) | |
5707 | return false; | |
5708 | strcpy (name, buf); | |
5709 | ||
5710 | sect = bfd_make_section (abfd, name); | |
5711 | if (sect == NULL) | |
5712 | return false; | |
5713 | ||
5714 | #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT) | |
5715 | sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs); | |
5716 | sect->filepos = note->descpos | |
5717 | + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs); | |
5718 | #endif | |
5719 | ||
5720 | #if defined (HAVE_LWPSTATUS_T_PR_REG) | |
5721 | sect->_raw_size = sizeof (lwpstat.pr_reg); | |
5722 | sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg); | |
5723 | #endif | |
5724 | ||
5725 | sect->flags = SEC_HAS_CONTENTS; | |
5726 | sect->alignment_power = 2; | |
5727 | ||
5728 | if (!elfcore_maybe_make_sect (abfd, ".reg", sect)) | |
5729 | return false; | |
5730 | ||
5731 | /* Make a ".reg2/999" section */ | |
5732 | ||
5733 | sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd)); | |
5734 | name = bfd_alloc (abfd, strlen (buf) + 1); | |
5735 | if (name == NULL) | |
5736 | return false; | |
5737 | strcpy (name, buf); | |
5738 | ||
5739 | sect = bfd_make_section (abfd, name); | |
5740 | if (sect == NULL) | |
5741 | return false; | |
5742 | ||
5743 | #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT) | |
5744 | sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs); | |
5745 | sect->filepos = note->descpos | |
5746 | + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs); | |
5747 | #endif | |
5748 | ||
5749 | #if defined (HAVE_LWPSTATUS_T_PR_FPREG) | |
5750 | sect->_raw_size = sizeof (lwpstat.pr_fpreg); | |
5751 | sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg); | |
5752 | #endif | |
5753 | ||
5754 | sect->flags = SEC_HAS_CONTENTS; | |
5755 | sect->alignment_power = 2; | |
5756 | ||
5757 | return elfcore_maybe_make_sect (abfd, ".reg2", sect); | |
5758 | } | |
5759 | #endif /* defined (HAVE_LWPSTATUS_T) */ | |
5760 | ||
5761 | #if defined (HAVE_WIN32_PSTATUS_T) | |
5762 | static boolean | |
5763 | elfcore_grok_win32pstatus (abfd, note) | |
5764 | bfd *abfd; | |
5765 | Elf_Internal_Note *note; | |
5766 | { | |
5767 | char buf[30]; | |
5768 | char *name; | |
5769 | asection *sect; | |
5770 | win32_pstatus_t pstatus; | |
5771 | ||
5772 | if (note->descsz < sizeof (pstatus)) | |
5773 | return true; | |
5774 | ||
5775 | memcpy (&pstatus, note->descdata, note->descsz); | |
5776 | ||
5777 | switch (pstatus.data_type) | |
5778 | { | |
5779 | case NOTE_INFO_PROCESS: | |
5780 | /* FIXME: need to add ->core_command. */ | |
5781 | elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal; | |
5782 | elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid; | |
5783 | break; | |
5784 | ||
5785 | case NOTE_INFO_THREAD: | |
5786 | /* Make a ".reg/999" section. */ | |
5787 | sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid); | |
5788 | ||
5789 | name = bfd_alloc (abfd, strlen (buf) + 1); | |
5790 | if (name == NULL) | |
5791 | return false; | |
5792 | ||
5793 | strcpy (name, buf); | |
5794 | ||
5795 | sect = bfd_make_section (abfd, name); | |
5796 | if (sect == NULL) | |
5797 | return false; | |
5798 | ||
5799 | sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context); | |
5800 | sect->filepos = note->descpos + offsetof (struct win32_pstatus, | |
5801 | data.thread_info.thread_context); | |
5802 | sect->flags = SEC_HAS_CONTENTS; | |
5803 | sect->alignment_power = 2; | |
5804 | ||
5805 | if (pstatus.data.thread_info.is_active_thread) | |
5806 | if (! elfcore_maybe_make_sect (abfd, ".reg", sect)) | |
5807 | return false; | |
5808 | break; | |
5809 | ||
5810 | case NOTE_INFO_MODULE: | |
5811 | /* Make a ".module/xxxxxxxx" section. */ | |
5812 | sprintf (buf, ".module/%08x", pstatus.data.module_info.base_address); | |
5813 | ||
5814 | name = bfd_alloc (abfd, strlen (buf) + 1); | |
5815 | if (name == NULL) | |
5816 | return false; | |
5817 | ||
5818 | strcpy (name, buf); | |
5819 | ||
5820 | sect = bfd_make_section (abfd, name); | |
5821 | ||
5822 | if (sect == NULL) | |
5823 | return false; | |
5824 | ||
5825 | sect->_raw_size = note->descsz; | |
5826 | sect->filepos = note->descpos; | |
5827 | sect->flags = SEC_HAS_CONTENTS; | |
5828 | sect->alignment_power = 2; | |
5829 | break; | |
5830 | ||
5831 | default: | |
5832 | return true; | |
5833 | } | |
5834 | ||
5835 | return true; | |
5836 | } | |
5837 | #endif /* HAVE_WIN32_PSTATUS_T */ | |
5838 | ||
5839 | static boolean | |
5840 | elfcore_grok_note (abfd, note) | |
5841 | bfd *abfd; | |
5842 | Elf_Internal_Note *note; | |
5843 | { | |
5844 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5845 | ||
5846 | switch (note->type) | |
5847 | { | |
5848 | default: | |
5849 | return true; | |
5850 | ||
5851 | case NT_PRSTATUS: | |
5852 | if (bed->elf_backend_grok_prstatus) | |
5853 | if ((*bed->elf_backend_grok_prstatus) (abfd, note)) | |
5854 | return true; | |
5855 | #if defined (HAVE_PRSTATUS_T) | |
5856 | return elfcore_grok_prstatus (abfd, note); | |
5857 | #else | |
5858 | return true; | |
5859 | #endif | |
5860 | ||
5861 | #if defined (HAVE_PSTATUS_T) | |
5862 | case NT_PSTATUS: | |
5863 | return elfcore_grok_pstatus (abfd, note); | |
5864 | #endif | |
5865 | ||
5866 | #if defined (HAVE_LWPSTATUS_T) | |
5867 | case NT_LWPSTATUS: | |
5868 | return elfcore_grok_lwpstatus (abfd, note); | |
5869 | #endif | |
5870 | ||
5871 | case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */ | |
5872 | return elfcore_grok_prfpreg (abfd, note); | |
5873 | ||
5874 | #if defined (HAVE_WIN32_PSTATUS_T) | |
5875 | case NT_WIN32PSTATUS: | |
5876 | return elfcore_grok_win32pstatus (abfd, note); | |
5877 | #endif | |
5878 | ||
5879 | case NT_PRXFPREG: /* Linux SSE extension */ | |
5880 | if (note->namesz == 5 | |
5881 | && ! strcmp (note->namedata, "LINUX")) | |
5882 | return elfcore_grok_prxfpreg (abfd, note); | |
5883 | else | |
5884 | return true; | |
5885 | ||
5886 | case NT_PRPSINFO: | |
5887 | case NT_PSINFO: | |
5888 | if (bed->elf_backend_grok_psinfo) | |
5889 | if ((*bed->elf_backend_grok_psinfo) (abfd, note)) | |
5890 | return true; | |
5891 | #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) | |
5892 | return elfcore_grok_psinfo (abfd, note); | |
5893 | #else | |
5894 | return true; | |
5895 | #endif | |
5896 | } | |
5897 | } | |
5898 | ||
5899 | static boolean | |
5900 | elfcore_read_notes (abfd, offset, size) | |
5901 | bfd *abfd; | |
5902 | bfd_vma offset; | |
5903 | bfd_vma size; | |
5904 | { | |
5905 | char *buf; | |
5906 | char *p; | |
5907 | ||
5908 | if (size <= 0) | |
5909 | return true; | |
5910 | ||
5911 | if (bfd_seek (abfd, offset, SEEK_SET) == -1) | |
5912 | return false; | |
5913 | ||
5914 | buf = bfd_malloc ((size_t) size); | |
5915 | if (buf == NULL) | |
5916 | return false; | |
5917 | ||
5918 | if (bfd_read (buf, size, 1, abfd) != size) | |
5919 | { | |
5920 | error: | |
5921 | free (buf); | |
5922 | return false; | |
5923 | } | |
5924 | ||
5925 | p = buf; | |
5926 | while (p < buf + size) | |
5927 | { | |
5928 | /* FIXME: bad alignment assumption. */ | |
5929 | Elf_External_Note *xnp = (Elf_External_Note *) p; | |
5930 | Elf_Internal_Note in; | |
5931 | ||
5932 | in.type = bfd_h_get_32 (abfd, (bfd_byte *) xnp->type); | |
5933 | ||
5934 | in.namesz = bfd_h_get_32 (abfd, (bfd_byte *) xnp->namesz); | |
5935 | in.namedata = xnp->name; | |
5936 | ||
5937 | in.descsz = bfd_h_get_32 (abfd, (bfd_byte *) xnp->descsz); | |
5938 | in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4); | |
5939 | in.descpos = offset + (in.descdata - buf); | |
5940 | ||
5941 | if (! elfcore_grok_note (abfd, &in)) | |
5942 | goto error; | |
5943 | ||
5944 | p = in.descdata + BFD_ALIGN (in.descsz, 4); | |
5945 | } | |
5946 | ||
5947 | free (buf); | |
5948 | return true; | |
5949 | } | |
5950 | \f | |
5951 | /* Providing external access to the ELF program header table. */ | |
5952 | ||
5953 | /* Return an upper bound on the number of bytes required to store a | |
5954 | copy of ABFD's program header table entries. Return -1 if an error | |
5955 | occurs; bfd_get_error will return an appropriate code. */ | |
5956 | ||
5957 | long | |
5958 | bfd_get_elf_phdr_upper_bound (abfd) | |
5959 | bfd *abfd; | |
5960 | { | |
5961 | if (abfd->xvec->flavour != bfd_target_elf_flavour) | |
5962 | { | |
5963 | bfd_set_error (bfd_error_wrong_format); | |
5964 | return -1; | |
5965 | } | |
5966 | ||
5967 | return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr); | |
5968 | } | |
5969 | ||
5970 | /* Copy ABFD's program header table entries to *PHDRS. The entries | |
5971 | will be stored as an array of Elf_Internal_Phdr structures, as | |
5972 | defined in include/elf/internal.h. To find out how large the | |
5973 | buffer needs to be, call bfd_get_elf_phdr_upper_bound. | |
5974 | ||
5975 | Return the number of program header table entries read, or -1 if an | |
5976 | error occurs; bfd_get_error will return an appropriate code. */ | |
5977 | ||
5978 | int | |
5979 | bfd_get_elf_phdrs (abfd, phdrs) | |
5980 | bfd *abfd; | |
5981 | void *phdrs; | |
5982 | { | |
5983 | int num_phdrs; | |
5984 | ||
5985 | if (abfd->xvec->flavour != bfd_target_elf_flavour) | |
5986 | { | |
5987 | bfd_set_error (bfd_error_wrong_format); | |
5988 | return -1; | |
5989 | } | |
5990 | ||
5991 | num_phdrs = elf_elfheader (abfd)->e_phnum; | |
5992 | memcpy (phdrs, elf_tdata (abfd)->phdr, | |
5993 | num_phdrs * sizeof (Elf_Internal_Phdr)); | |
5994 | ||
5995 | return num_phdrs; | |
5996 | } |