projects / deliverable / binutils-gdb.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Use address size prefix for loopw as for jcxz.
[deliverable/binutils-gdb.git] / bfd / elf.c
CommitLineData
32090b8e 1/* ELF executable support for BFD.
fd8d7c31 2 Copyright 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
32090b8e
KR		 3
4This file is part of BFD, the Binary File Descriptor library.
5
6This program is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2 of the License, or
9(at your option) any later version.
10
11This program is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with this program; if not, write to the Free Software
6f904fce 18Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
32090b8e 19
d1b44e83
ILT		 20/*
21
22SECTION
23 ELF backends
24
25 BFD support for ELF formats is being worked on.
26 Currently, the best supported back ends are for sparc and i386
27 (running svr4 or Solaris 2).
28
29 Documentation of the internals of the support code still needs
30 to be written. The code is changing quickly enough that we
31 haven't bothered yet.
32 */
33
32090b8e
KR		 34#include "bfd.h"
35#include "sysdep.h"
013dec1a 36#include "bfdlink.h"
32090b8e
KR		 37#include "libbfd.h"
38#define ARCH_SIZE 0
6ab826bd 39#include "elf-bfd.h"
32090b8e 40
fd0198f0 41static INLINE struct elf_segment_map *make_mapping
edf3fe48 42 PARAMS ((bfd *, asection **, unsigned int, unsigned int, boolean));
191d910c 43static boolean map_sections_to_segments PARAMS ((bfd *));
fd0198f0
ILT		 44static int elf_sort_sections PARAMS ((const PTR, const PTR));
45static boolean assign_file_positions_for_segments PARAMS ((bfd *));
46static boolean assign_file_positions_except_relocs PARAMS ((bfd *));
ede4eed4
KR		 47static boolean prep_headers PARAMS ((bfd *));
48static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **));
3dbf33ee 49static boolean copy_private_bfd_data PARAMS ((bfd *, bfd *));
ea3f0585
FF		 50static char *elf_read PARAMS ((bfd *, long, unsigned int));
51static void elf_fake_sections PARAMS ((bfd *, asection *, PTR));
52static boolean assign_section_numbers PARAMS ((bfd *));
53static INLINE int sym_is_global PARAMS ((bfd *, asymbol *));
54static boolean elf_map_symbols PARAMS ((bfd *));
55static bfd_size_type get_program_header_size PARAMS ((bfd *));
ede4eed4 56
a66a61a0
ILT		 57/* Swap version information in and out. The version information is
58 currently size independent. If that ever changes, this code will
59 need to move into elfcode.h. */
60
61/* Swap in a Verdef structure. */
62
63void
64_bfd_elf_swap_verdef_in (abfd, src, dst)
65 bfd *abfd;
66 const Elf_External_Verdef *src;
67 Elf_Internal_Verdef *dst;
68{
69 dst->vd_version = bfd_h_get_16 (abfd, src->vd_version);
70 dst->vd_flags = bfd_h_get_16 (abfd, src->vd_flags);
71 dst->vd_ndx = bfd_h_get_16 (abfd, src->vd_ndx);
72 dst->vd_cnt = bfd_h_get_16 (abfd, src->vd_cnt);
73 dst->vd_hash = bfd_h_get_32 (abfd, src->vd_hash);
74 dst->vd_aux = bfd_h_get_32 (abfd, src->vd_aux);
75 dst->vd_next = bfd_h_get_32 (abfd, src->vd_next);
76}
77
78/* Swap out a Verdef structure. */
79
80void
81_bfd_elf_swap_verdef_out (abfd, src, dst)
82 bfd *abfd;
83 const Elf_Internal_Verdef *src;
84 Elf_External_Verdef *dst;
85{
86 bfd_h_put_16 (abfd, src->vd_version, dst->vd_version);
87 bfd_h_put_16 (abfd, src->vd_flags, dst->vd_flags);
88 bfd_h_put_16 (abfd, src->vd_ndx, dst->vd_ndx);
89 bfd_h_put_16 (abfd, src->vd_cnt, dst->vd_cnt);
90 bfd_h_put_32 (abfd, src->vd_hash, dst->vd_hash);
91 bfd_h_put_32 (abfd, src->vd_aux, dst->vd_aux);
92 bfd_h_put_32 (abfd, src->vd_next, dst->vd_next);
93}
94
95/* Swap in a Verdaux structure. */
96
97void
98_bfd_elf_swap_verdaux_in (abfd, src, dst)
99 bfd *abfd;
100 const Elf_External_Verdaux *src;
101 Elf_Internal_Verdaux *dst;
102{
103 dst->vda_name = bfd_h_get_32 (abfd, src->vda_name);
104 dst->vda_next = bfd_h_get_32 (abfd, src->vda_next);
105}
106
107/* Swap out a Verdaux structure. */
108
109void
110_bfd_elf_swap_verdaux_out (abfd, src, dst)
111 bfd *abfd;
112 const Elf_Internal_Verdaux *src;
113 Elf_External_Verdaux *dst;
114{
115 bfd_h_put_32 (abfd, src->vda_name, dst->vda_name);
116 bfd_h_put_32 (abfd, src->vda_next, dst->vda_next);
117}
118
119/* Swap in a Verneed structure. */
120
121void
122_bfd_elf_swap_verneed_in (abfd, src, dst)
123 bfd *abfd;
124 const Elf_External_Verneed *src;
125 Elf_Internal_Verneed *dst;
126{
127 dst->vn_version = bfd_h_get_16 (abfd, src->vn_version);
128 dst->vn_cnt = bfd_h_get_16 (abfd, src->vn_cnt);
129 dst->vn_file = bfd_h_get_32 (abfd, src->vn_file);
130 dst->vn_aux = bfd_h_get_32 (abfd, src->vn_aux);
131 dst->vn_next = bfd_h_get_32 (abfd, src->vn_next);
132}
133
134/* Swap out a Verneed structure. */
135
136void
137_bfd_elf_swap_verneed_out (abfd, src, dst)
138 bfd *abfd;
139 const Elf_Internal_Verneed *src;
140 Elf_External_Verneed *dst;
141{
142 bfd_h_put_16 (abfd, src->vn_version, dst->vn_version);
143 bfd_h_put_16 (abfd, src->vn_cnt, dst->vn_cnt);
144 bfd_h_put_32 (abfd, src->vn_file, dst->vn_file);
145 bfd_h_put_32 (abfd, src->vn_aux, dst->vn_aux);
146 bfd_h_put_32 (abfd, src->vn_next, dst->vn_next);
147}
148
149/* Swap in a Vernaux structure. */
150
151void
152_bfd_elf_swap_vernaux_in (abfd, src, dst)
153 bfd *abfd;
154 const Elf_External_Vernaux *src;
155 Elf_Internal_Vernaux *dst;
156{
157 dst->vna_hash = bfd_h_get_32 (abfd, src->vna_hash);
158 dst->vna_flags = bfd_h_get_16 (abfd, src->vna_flags);
159 dst->vna_other = bfd_h_get_16 (abfd, src->vna_other);
160 dst->vna_name = bfd_h_get_32 (abfd, src->vna_name);
161 dst->vna_next = bfd_h_get_32 (abfd, src->vna_next);
162}
163
164/* Swap out a Vernaux structure. */
165
166void
167_bfd_elf_swap_vernaux_out (abfd, src, dst)
168 bfd *abfd;
169 const Elf_Internal_Vernaux *src;
170 Elf_External_Vernaux *dst;
171{
172 bfd_h_put_32 (abfd, src->vna_hash, dst->vna_hash);
173 bfd_h_put_16 (abfd, src->vna_flags, dst->vna_flags);
174 bfd_h_put_16 (abfd, src->vna_other, dst->vna_other);
175 bfd_h_put_32 (abfd, src->vna_name, dst->vna_name);
176 bfd_h_put_32 (abfd, src->vna_next, dst->vna_next);
177}
178
179/* Swap in a Versym structure. */
180
181void
182_bfd_elf_swap_versym_in (abfd, src, dst)
183 bfd *abfd;
184 const Elf_External_Versym *src;
185 Elf_Internal_Versym *dst;
186{
187 dst->vs_vers = bfd_h_get_16 (abfd, src->vs_vers);
188}
189
190/* Swap out a Versym structure. */
191
192void
193_bfd_elf_swap_versym_out (abfd, src, dst)
194 bfd *abfd;
195 const Elf_Internal_Versym *src;
196 Elf_External_Versym *dst;
197{
198 bfd_h_put_16 (abfd, src->vs_vers, dst->vs_vers);
199}
200
32090b8e
KR		 201/* Standard ELF hash function. Do not change this function; you will
202 cause invalid hash tables to be generated. (Well, you would if this
203 were being used yet.) */
204unsigned long
013dec1a
ILT		 205bfd_elf_hash (name)
206 CONST unsigned char *name;
32090b8e
KR		 207{
208 unsigned long h = 0;
209 unsigned long g;
210 int ch;
211
212 while ((ch = *name++) != '\0')
213 {
214 h = (h << 4) + ch;
215 if ((g = (h & 0xf0000000)) != 0)
216 {
217 h ^= g >> 24;
218 h &= ~g;
219 }
220 }
221 return h;
222}
223
224/* Read a specified number of bytes at a specified offset in an ELF
225 file, into a newly allocated buffer, and return a pointer to the
226 buffer. */
227
228static char *
013dec1a
ILT		 229elf_read (abfd, offset, size)
230 bfd * abfd;
231 long offset;
ae115e51 232 unsigned int size;
32090b8e
KR		 233{
234 char *buf;
235
236 if ((buf = bfd_alloc (abfd, size)) == NULL)
a9713b91 237 return NULL;
32090b8e 238 if (bfd_seek (abfd, offset, SEEK_SET) == -1)
013dec1a 239 return NULL;
32090b8e
KR		 240 if (bfd_read ((PTR) buf, size, 1, abfd) != size)
241 {
013dec1a
ILT		 242 if (bfd_get_error () != bfd_error_system_call)
243 bfd_set_error (bfd_error_file_truncated);
32090b8e
KR		 244 return NULL;
245 }
246 return buf;
247}
248
249boolean
ff12f303 250bfd_elf_mkobject (abfd)
013dec1a 251 bfd * abfd;
32090b8e
KR		 252{
253 /* this just does initialization */
254 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
255 elf_tdata (abfd) = (struct elf_obj_tdata *)
256 bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
257 if (elf_tdata (abfd) == 0)
a9713b91 258 return false;
32090b8e
KR		 259 /* since everything is done at close time, do we need any
260 initialization? */
261
262 return true;
263}
264
265char *
ede4eed4 266bfd_elf_get_str_section (abfd, shindex)
013dec1a
ILT		 267 bfd * abfd;
268 unsigned int shindex;
32090b8e
KR		 269{
270 Elf_Internal_Shdr **i_shdrp;
271 char *shstrtab = NULL;
272 unsigned int offset;
273 unsigned int shstrtabsize;
274
275 i_shdrp = elf_elfsections (abfd);
276 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
277 return 0;
278
b176e1e9 279 shstrtab = (char *) i_shdrp[shindex]->contents;
32090b8e
KR		 280 if (shstrtab == NULL)
281 {
282 /* No cached one, attempt to read, and cache what we read. */
283 offset = i_shdrp[shindex]->sh_offset;
284 shstrtabsize = i_shdrp[shindex]->sh_size;
285 shstrtab = elf_read (abfd, offset, shstrtabsize);
b176e1e9 286 i_shdrp[shindex]->contents = (PTR) shstrtab;
32090b8e
KR		 287 }
288 return shstrtab;
289}
290
291char *
ede4eed4 292bfd_elf_string_from_elf_section (abfd, shindex, strindex)
013dec1a
ILT		 293 bfd * abfd;
294 unsigned int shindex;
295 unsigned int strindex;
32090b8e
KR		 296{
297 Elf_Internal_Shdr *hdr;
298
299 if (strindex == 0)
300 return "";
301
302 hdr = elf_elfsections (abfd)[shindex];
303
b176e1e9 304 if (hdr->contents == NULL
ede4eed4 305 && bfd_elf_get_str_section (abfd, shindex) == NULL)
32090b8e
KR		 306 return NULL;
307
20db2495
ILT		 308 if (strindex >= hdr->sh_size)
309 {
310 (*_bfd_error_handler)
311 ("%s: invalid string offset %u >= %lu for section `%s'",
312 bfd_get_filename (abfd), strindex, (unsigned long) hdr->sh_size,
313 ((shindex == elf_elfheader(abfd)->e_shstrndx
314 && strindex == hdr->sh_name)
315 ? ".shstrtab"
316 : elf_string_from_elf_strtab (abfd, hdr->sh_name)));
317 return "";
318 }
319
b176e1e9 320 return ((char *) hdr->contents) + strindex;
32090b8e
KR		 321}
322
497c5434 323/* Make a BFD section from an ELF section. We store a pointer to the
b176e1e9 324 BFD section in the bfd_section field of the header. */
497c5434
ILT		 325
326boolean
327_bfd_elf_make_section_from_shdr (abfd, hdr, name)
328 bfd *abfd;
329 Elf_Internal_Shdr *hdr;
330 const char *name;
331{
332 asection *newsect;
333 flagword flags;
334
b176e1e9 335 if (hdr->bfd_section != NULL)
497c5434 336 {
b176e1e9
ILT		 337 BFD_ASSERT (strcmp (name,
338 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
497c5434
ILT		 339 return true;
340 }
341
342 newsect = bfd_make_section_anyway (abfd, name);
343 if (newsect == NULL)
344 return false;
345
346 newsect->filepos = hdr->sh_offset;
347
348 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
349 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
350 || ! bfd_set_section_alignment (abfd, newsect,
351 bfd_log2 (hdr->sh_addralign)))
352 return false;
353
354 flags = SEC_NO_FLAGS;
355 if (hdr->sh_type != SHT_NOBITS)
356 flags |= SEC_HAS_CONTENTS;
357 if ((hdr->sh_flags & SHF_ALLOC) != 0)
358 {
359 flags |= SEC_ALLOC;
360 if (hdr->sh_type != SHT_NOBITS)
361 flags |= SEC_LOAD;
362 }
363 if ((hdr->sh_flags & SHF_WRITE) == 0)
364 flags |= SEC_READONLY;
365 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
366 flags |= SEC_CODE;
7c6da9ca 367 else if ((flags & SEC_LOAD) != 0)
497c5434
ILT		 368 flags |= SEC_DATA;
369
370 /* The debugging sections appear to be recognized only by name, not
371 any sort of flag. */
372 if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0
373 || strncmp (name, ".line", sizeof ".line" - 1) == 0
374 || strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
375 flags |= SEC_DEBUGGING;
376
f0c12b73
DE		 377 /* As a GNU extension, if the name begins with .gnu.linkonce, we
378 only link a single copy of the section. This is used to support
379 g++. g++ will emit each template expansion in its own section.
380 The symbols will be defined as weak, so that multiple definitions
381 are permitted. The GNU linker extension is to actually discard
382 all but one of the sections. */
383 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
384 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
385
497c5434
ILT		 386 if (! bfd_set_section_flags (abfd, newsect, flags))
387 return false;
388
fd0198f0
ILT		 389 if ((flags & SEC_ALLOC) != 0)
390 {
391 Elf_Internal_Phdr *phdr;
392 unsigned int i;
393
394 /* Look through the phdrs to see if we need to adjust the lma. */
395 phdr = elf_tdata (abfd)->phdr;
396 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
397 {
398 if (phdr->p_type == PT_LOAD
6933148a 399 && phdr->p_paddr != 0
fd0198f0
ILT		 400 && phdr->p_vaddr != phdr->p_paddr
401 && phdr->p_vaddr <= hdr->sh_addr
b944e7e8
ILT		 402 && phdr->p_vaddr + phdr->p_memsz >= hdr->sh_addr + hdr->sh_size
403 && ((flags & SEC_LOAD) == 0
404 || (phdr->p_offset <= hdr->sh_offset
405 && (phdr->p_offset + phdr->p_filesz
406 >= hdr->sh_offset + hdr->sh_size))))
fd0198f0
ILT		 407 {
408 newsect->lma += phdr->p_paddr - phdr->p_vaddr;
409 break;
410 }
411 }
412 }
413
b176e1e9 414 hdr->bfd_section = newsect;
497c5434
ILT		 415 elf_section_data (newsect)->this_hdr = *hdr;
416
417 return true;
418}
419
32090b8e
KR		 420/*
421INTERNAL_FUNCTION
422 bfd_elf_find_section
423
424SYNOPSIS
425 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
426
427DESCRIPTION
428 Helper functions for GDB to locate the string tables.
429 Since BFD hides string tables from callers, GDB needs to use an
430 internal hook to find them. Sun's .stabstr, in particular,
431 isn't even pointed to by the .stab section, so ordinary
432 mechanisms wouldn't work to find it, even if we had some.
433*/
434
435struct elf_internal_shdr *
013dec1a
ILT		 436bfd_elf_find_section (abfd, name)
437 bfd * abfd;
438 char *name;
32090b8e
KR		 439{
440 Elf_Internal_Shdr **i_shdrp;
441 char *shstrtab;
442 unsigned int max;
443 unsigned int i;
444
445 i_shdrp = elf_elfsections (abfd);
446 if (i_shdrp != NULL)
447 {
ede4eed4 448 shstrtab = bfd_elf_get_str_section (abfd, elf_elfheader (abfd)->e_shstrndx);
32090b8e
KR		 449 if (shstrtab != NULL)
450 {
451 max = elf_elfheader (abfd)->e_shnum;
452 for (i = 1; i < max; i++)
453 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
454 return i_shdrp[i];
455 }
456 }
457 return 0;
458}
459
32090b8e
KR		 460const char *const bfd_elf_section_type_names[] = {
461 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
462 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
463 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
464};
465
466/* ELF relocs are against symbols. If we are producing relocateable
467 output, and the reloc is against an external symbol, and nothing
468 has given us any additional addend, the resulting reloc will also
469 be against the same symbol. In such a case, we don't want to
470 change anything about the way the reloc is handled, since it will
471 all be done at final link time. Rather than put special case code
472 into bfd_perform_relocation, all the reloc types use this howto
473 function. It just short circuits the reloc if producing
474 relocateable output against an external symbol. */
475
013dec1a 476/*ARGSUSED*/
32090b8e
KR		 477bfd_reloc_status_type
478bfd_elf_generic_reloc (abfd,
479 reloc_entry,
480 symbol,
481 data,
482 input_section,
4c3721d5
ILT		 483 output_bfd,
484 error_message)
32090b8e
KR		 485 bfd *abfd;
486 arelent *reloc_entry;
487 asymbol *symbol;
488 PTR data;
489 asection *input_section;
490 bfd *output_bfd;
4c3721d5 491 char **error_message;
32090b8e
KR		 492{
493 if (output_bfd != (bfd *) NULL
494 && (symbol->flags & BSF_SECTION_SYM) == 0
d1b44e83
ILT		 495 && (! reloc_entry->howto->partial_inplace
496 || reloc_entry->addend == 0))
32090b8e
KR		 497 {
498 reloc_entry->address += input_section->output_offset;
499 return bfd_reloc_ok;
500 }
501
502 return bfd_reloc_continue;
503}
013dec1a 504\f
27fb8f29
ILT		 505/* Print out the program headers. */
506
507boolean
508_bfd_elf_print_private_bfd_data (abfd, farg)
509 bfd *abfd;
510 PTR farg;
511{
512 FILE *f = (FILE *) farg;
513 Elf_Internal_Phdr *p;
02fcd126
ILT		 514 asection *s;
515 bfd_byte *dynbuf = NULL;
27fb8f29
ILT		 516
517 p = elf_tdata (abfd)->phdr;
02fcd126 518 if (p != NULL)
27fb8f29 519 {
02fcd126 520 unsigned int i, c;
27fb8f29 521
02fcd126
ILT		 522 fprintf (f, "\nProgram Header:\n");
523 c = elf_elfheader (abfd)->e_phnum;
524 for (i = 0; i < c; i++, p++)
27fb8f29 525 {
02fcd126
ILT		 526 const char *s;
527 char buf[20];
528
529 switch (p->p_type)
530 {
531 case PT_NULL: s = "NULL"; break;
532 case PT_LOAD: s = "LOAD"; break;
533 case PT_DYNAMIC: s = "DYNAMIC"; break;
534 case PT_INTERP: s = "INTERP"; break;
535 case PT_NOTE: s = "NOTE"; break;
536 case PT_SHLIB: s = "SHLIB"; break;
537 case PT_PHDR: s = "PHDR"; break;
538 default: sprintf (buf, "0x%lx", p->p_type); s = buf; break;
539 }
540 fprintf (f, "%8s off 0x", s);
541 fprintf_vma (f, p->p_offset);
542 fprintf (f, " vaddr 0x");
543 fprintf_vma (f, p->p_vaddr);
544 fprintf (f, " paddr 0x");
545 fprintf_vma (f, p->p_paddr);
546 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
547 fprintf (f, " filesz 0x");
548 fprintf_vma (f, p->p_filesz);
549 fprintf (f, " memsz 0x");
550 fprintf_vma (f, p->p_memsz);
551 fprintf (f, " flags %c%c%c",
552 (p->p_flags & PF_R) != 0 ? 'r' : '-',
553 (p->p_flags & PF_W) != 0 ? 'w' : '-',
554 (p->p_flags & PF_X) != 0 ? 'x' : '-');
555 if ((p->p_flags &~ (PF_R | PF_W | PF_X)) != 0)
556 fprintf (f, " %lx", p->p_flags &~ (PF_R | PF_W | PF_X));
557 fprintf (f, "\n");
558 }
559 }
560
561 s = bfd_get_section_by_name (abfd, ".dynamic");
562 if (s != NULL)
563 {
564 int elfsec;
565 unsigned long link;
566 bfd_byte *extdyn, *extdynend;
567 size_t extdynsize;
568 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
569
570 fprintf (f, "\nDynamic Section:\n");
571
572 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
573 if (dynbuf == NULL)
574 goto error_return;
575 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
576 s->_raw_size))
577 goto error_return;
578
579 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
580 if (elfsec == -1)
581 goto error_return;
582 link = elf_elfsections (abfd)[elfsec]->sh_link;
583
584 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
585 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
586
587 extdyn = dynbuf;
588 extdynend = extdyn + s->_raw_size;
589 for (; extdyn < extdynend; extdyn += extdynsize)
590 {
591 Elf_Internal_Dyn dyn;
592 const char *name;
593 char ab[20];
594 boolean stringp;
595
596 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
597
598 if (dyn.d_tag == DT_NULL)
599 break;
600
601 stringp = false;
602 switch (dyn.d_tag)
603 {
604 default:
927d05b5 605 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
02fcd126
ILT		 606 name = ab;
607 break;
608
609 case DT_NEEDED: name = "NEEDED"; stringp = true; break;
610 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
611 case DT_PLTGOT: name = "PLTGOT"; break;
612 case DT_HASH: name = "HASH"; break;
613 case DT_STRTAB: name = "STRTAB"; break;
614 case DT_SYMTAB: name = "SYMTAB"; break;
615 case DT_RELA: name = "RELA"; break;
616 case DT_RELASZ: name = "RELASZ"; break;
617 case DT_RELAENT: name = "RELAENT"; break;
618 case DT_STRSZ: name = "STRSZ"; break;
619 case DT_SYMENT: name = "SYMENT"; break;
620 case DT_INIT: name = "INIT"; break;
621 case DT_FINI: name = "FINI"; break;
622 case DT_SONAME: name = "SONAME"; stringp = true; break;
623 case DT_RPATH: name = "RPATH"; stringp = true; break;
624 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
625 case DT_REL: name = "REL"; break;
626 case DT_RELSZ: name = "RELSZ"; break;
627 case DT_RELENT: name = "RELENT"; break;
628 case DT_PLTREL: name = "PLTREL"; break;
629 case DT_DEBUG: name = "DEBUG"; break;
630 case DT_TEXTREL: name = "TEXTREL"; break;
631 case DT_JMPREL: name = "JMPREL"; break;
148437ec
ILT		 632 case DT_AUXILIARY: name = "AUXILIARY"; stringp = true; break;
633 case DT_FILTER: name = "FILTER"; stringp = true; break;
a66a61a0
ILT		 634 case DT_VERSYM: name = "VERSYM"; break;
635 case DT_VERDEF: name = "VERDEF"; break;
636 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
637 case DT_VERNEED: name = "VERNEED"; break;
638 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
02fcd126
ILT		 639 }
640
641 fprintf (f, " %-11s ", name);
642 if (! stringp)
927d05b5 643 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
02fcd126
ILT		 644 else
645 {
646 const char *string;
647
648 string = bfd_elf_string_from_elf_section (abfd, link,
649 dyn.d_un.d_val);
650 if (string == NULL)
651 goto error_return;
652 fprintf (f, "%s", string);
653 }
654 fprintf (f, "\n");
27fb8f29 655 }
02fcd126
ILT		 656
657 free (dynbuf);
658 dynbuf = NULL;
27fb8f29
ILT		 659 }
660
a66a61a0
ILT		 661 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
662 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
663 {
664 if (! _bfd_elf_slurp_version_tables (abfd))
665 return false;
666 }
667
668 if (elf_dynverdef (abfd) != 0)
669 {
670 Elf_Internal_Verdef *t;
671
672 fprintf (f, "\nVersion definitions:\n");
673 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
674 {
675 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
676 t->vd_flags, t->vd_hash, t->vd_nodename);
677 if (t->vd_auxptr->vda_nextptr != NULL)
678 {
679 Elf_Internal_Verdaux *a;
680
681 fprintf (f, "\t");
682 for (a = t->vd_auxptr->vda_nextptr;
683 a != NULL;
684 a = a->vda_nextptr)
685 fprintf (f, "%s ", a->vda_nodename);
686 fprintf (f, "\n");
687 }
688 }
689 }
690
691 if (elf_dynverref (abfd) != 0)
692 {
693 Elf_Internal_Verneed *t;
694
695 fprintf (f, "\nVersion References:\n");
696 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
697 {
698 Elf_Internal_Vernaux *a;
699
700 fprintf (f, " required from %s:\n", t->vn_filename);
701 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
702 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
703 a->vna_flags, a->vna_other, a->vna_nodename);
704 }
705 }
706
27fb8f29 707 return true;
02fcd126
ILT		 708
709 error_return:
710 if (dynbuf != NULL)
711 free (dynbuf);
712 return false;
27fb8f29
ILT		 713}
714
b176e1e9 715/* Display ELF-specific fields of a symbol. */
d6bfcdb5 716
b176e1e9 717void
d6bfcdb5
ILT		 718bfd_elf_print_symbol (abfd, filep, symbol, how)
719 bfd *abfd;
b176e1e9
ILT		 720 PTR filep;
721 asymbol *symbol;
722 bfd_print_symbol_type how;
723{
724 FILE *file = (FILE *) filep;
725 switch (how)
726 {
727 case bfd_print_symbol_name:
728 fprintf (file, "%s", symbol->name);
729 break;
730 case bfd_print_symbol_more:
731 fprintf (file, "elf ");
732 fprintf_vma (file, symbol->value);
733 fprintf (file, " %lx", (long) symbol->flags);
734 break;
735 case bfd_print_symbol_all:
736 {
737 CONST char *section_name;
738 section_name = symbol->section ? symbol->section->name : "(*none*)";
739 bfd_print_symbol_vandf ((PTR) file, symbol);
740 fprintf (file, " %s\t", section_name);
741 /* Print the "other" value for a symbol. For common symbols,
742 we've already printed the size; now print the alignment.
743 For other symbols, we have no specified alignment, and
744 we've printed the address; now print the size. */
745 fprintf_vma (file,
746 (bfd_is_com_section (symbol->section)
747 ? ((elf_symbol_type *) symbol)->internal_elf_sym.st_value
748 : ((elf_symbol_type *) symbol)->internal_elf_sym.st_size));
d6bfcdb5
ILT		 749
750 /* If we have version information, print it. */
751 if (elf_tdata (abfd)->dynversym_section != 0
752 && (elf_tdata (abfd)->dynverdef_section != 0
753 || elf_tdata (abfd)->dynverref_section != 0))
754 {
755 unsigned int vernum;
756 const char *version_string;
757
758 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
759
760 if (vernum == 0)
761 version_string = "";
762 else if (vernum == 1)
763 version_string = "Base";
20db2495 764 else if (vernum <= elf_tdata (abfd)->cverdefs)
d6bfcdb5
ILT		 765 version_string =
766 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
767 else
768 {
769 Elf_Internal_Verneed *t;
770
771 version_string = "";
772 for (t = elf_tdata (abfd)->verref;
773 t != NULL;
774 t = t->vn_nextref)
775 {
776 Elf_Internal_Vernaux *a;
777
778 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
779 {
780 if (a->vna_other == vernum)
781 {
782 version_string = a->vna_nodename;
783 break;
784 }
785 }
786 }
787 }
788
789 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
20db2495 790 fprintf (file, " %-11s", version_string);
d6bfcdb5
ILT		 791 else
792 {
793 int i;
794
795 fprintf (file, " (%s)", version_string);
20db2495 796 for (i = 10 - strlen (version_string); i > 0; --i)
d6bfcdb5
ILT		 797 putc (' ', file);
798 }
799 }
800
69e2ff18
ILT		 801 /* If the st_other field is not zero, print it. */
802 if (((elf_symbol_type *) symbol)->internal_elf_sym.st_other != 0)
803 fprintf (file, " 0x%02x",
804 ((unsigned int)
805 ((elf_symbol_type *) symbol)->internal_elf_sym.st_other));
d6bfcdb5 806
b176e1e9
ILT		 807 fprintf (file, " %s", symbol->name);
808 }
809 break;
810 }
811}
812\f
013dec1a
ILT		 813/* Create an entry in an ELF linker hash table. */
814
5315c428
ILT		 815struct bfd_hash_entry *
816_bfd_elf_link_hash_newfunc (entry, table, string)
013dec1a
ILT		 817 struct bfd_hash_entry *entry;
818 struct bfd_hash_table *table;
819 const char *string;
820{
821 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
822
823 /* Allocate the structure if it has not already been allocated by a
824 subclass. */
825 if (ret == (struct elf_link_hash_entry *) NULL)
826 ret = ((struct elf_link_hash_entry *)
827 bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)));
828 if (ret == (struct elf_link_hash_entry *) NULL)
a9713b91 829 return (struct bfd_hash_entry *) ret;
013dec1a
ILT		 830
831 /* Call the allocation method of the superclass. */
832 ret = ((struct elf_link_hash_entry *)
833 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
834 table, string));
835 if (ret != (struct elf_link_hash_entry *) NULL)
836 {
837 /* Set local fields. */
838 ret->indx = -1;
839 ret->size = 0;
013dec1a
ILT		 840 ret->dynindx = -1;
841 ret->dynstr_index = 0;
842 ret->weakdef = NULL;
b176e1e9
ILT		 843 ret->got_offset = (bfd_vma) -1;
844 ret->plt_offset = (bfd_vma) -1;
86aac8ea 845 ret->linker_section_pointer = (elf_linker_section_pointers_t *)0;
a66a61a0 846 ret->verinfo.verdef = NULL;
013dec1a 847 ret->type = STT_NOTYPE;
80be821d 848 ret->other = 0;
869b7d80
ILT		 849 /* Assume that we have been called by a non-ELF symbol reader.
850 This flag is then reset by the code which reads an ELF input
851 file. This ensures that a symbol created by a non-ELF symbol
852 reader will have the flag set correctly. */
853 ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
013dec1a
ILT		 854 }
855
856 return (struct bfd_hash_entry *) ret;
857}
858
5315c428
ILT		 859/* Initialize an ELF linker hash table. */
860
861boolean
862_bfd_elf_link_hash_table_init (table, abfd, newfunc)
863 struct elf_link_hash_table *table;
864 bfd *abfd;
865 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
866 struct bfd_hash_table *,
867 const char *));
868{
b176e1e9 869 table->dynamic_sections_created = false;
5315c428 870 table->dynobj = NULL;
b176e1e9
ILT		 871 /* The first dynamic symbol is a dummy. */
872 table->dynsymcount = 1;
5315c428
ILT		 873 table->dynstr = NULL;
874 table->bucketcount = 0;
b176e1e9 875 table->needed = NULL;
19bfbcbe 876 table->hgot = NULL;
d1bf45aa 877 table->stab_info = NULL;
5315c428
ILT		 878 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
879}
880
013dec1a
ILT		 881/* Create an ELF linker hash table. */
882
883struct bfd_link_hash_table *
884_bfd_elf_link_hash_table_create (abfd)
885 bfd *abfd;
886{
887 struct elf_link_hash_table *ret;
888
889 ret = ((struct elf_link_hash_table *)
890 bfd_alloc (abfd, sizeof (struct elf_link_hash_table)));
891 if (ret == (struct elf_link_hash_table *) NULL)
a9713b91 892 return NULL;
5315c428
ILT		 893
894 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
013dec1a
ILT		 895 {
896 bfd_release (abfd, ret);
897 return NULL;
898 }
899
013dec1a
ILT		 900 return &ret->root;
901}
7c6da9ca
ILT		 902
903/* This is a hook for the ELF emulation code in the generic linker to
904 tell the backend linker what file name to use for the DT_NEEDED
b176e1e9
ILT		 905 entry for a dynamic object. The generic linker passes name as an
906 empty string to indicate that no DT_NEEDED entry should be made. */
7c6da9ca
ILT		 907
908void
909bfd_elf_set_dt_needed_name (abfd, name)
910 bfd *abfd;
911 const char *name;
912{
053ae1d7
ILT		 913 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
914 && bfd_get_format (abfd) == bfd_object)
915 elf_dt_name (abfd) = name;
7c6da9ca 916}
b176e1e9 917
053ae1d7
ILT		 918/* Get the list of DT_NEEDED entries for a link. This is a hook for
919 the ELF emulation code. */
b176e1e9 920
5fe14a9f 921struct bfd_link_needed_list *
b176e1e9
ILT		 922bfd_elf_get_needed_list (abfd, info)
923 bfd *abfd;
924 struct bfd_link_info *info;
925{
b2193cc5
ILT		 926 if (info->hash->creator->flavour != bfd_target_elf_flavour)
927 return NULL;
b176e1e9
ILT		 928 return elf_hash_table (info)->needed;
929}
053ae1d7
ILT		 930
931/* Get the name actually used for a dynamic object for a link. This
932 is the SONAME entry if there is one. Otherwise, it is the string
933 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
934
935const char *
936bfd_elf_get_dt_soname (abfd)
937 bfd *abfd;
938{
939 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
940 && bfd_get_format (abfd) == bfd_object)
941 return elf_dt_name (abfd);
942 return NULL;
943}
ede4eed4
KR		 944\f
945/* Allocate an ELF string table--force the first byte to be zero. */
946
947struct bfd_strtab_hash *
948_bfd_elf_stringtab_init ()
949{
950 struct bfd_strtab_hash *ret;
951
952 ret = _bfd_stringtab_init ();
953 if (ret != NULL)
954 {
955 bfd_size_type loc;
956
957 loc = _bfd_stringtab_add (ret, "", true, false);
958 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
959 if (loc == (bfd_size_type) -1)
960 {
961 _bfd_stringtab_free (ret);
962 ret = NULL;
963 }
964 }
965 return ret;
966}
967\f
968/* ELF .o/exec file reading */
969
970/* Create a new bfd section from an ELF section header. */
971
972boolean
973bfd_section_from_shdr (abfd, shindex)
974 bfd *abfd;
975 unsigned int shindex;
976{
977 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
978 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
979 struct elf_backend_data *bed = get_elf_backend_data (abfd);
980 char *name;
981
982 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
983
984 switch (hdr->sh_type)
985 {
986 case SHT_NULL:
987 /* Inactive section. Throw it away. */
988 return true;
989
990 case SHT_PROGBITS: /* Normal section with contents. */
991 case SHT_DYNAMIC: /* Dynamic linking information. */
992 case SHT_NOBITS: /* .bss section. */
993 case SHT_HASH: /* .hash section. */
5b3b9ff6 994 case SHT_NOTE: /* .note section. */
ede4eed4
KR		 995 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
996
997 case SHT_SYMTAB: /* A symbol table */
998 if (elf_onesymtab (abfd) == shindex)
999 return true;
1000
1001 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1002 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1003 elf_onesymtab (abfd) = shindex;
1004 elf_tdata (abfd)->symtab_hdr = *hdr;
fd0198f0 1005 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
ede4eed4
KR		 1006 abfd->flags |= HAS_SYMS;
1007
1008 /* Sometimes a shared object will map in the symbol table. If
1009 SHF_ALLOC is set, and this is a shared object, then we also
1010 treat this section as a BFD section. We can not base the
1011 decision purely on SHF_ALLOC, because that flag is sometimes
1012 set in a relocateable object file, which would confuse the
1013 linker. */
1014 if ((hdr->sh_flags & SHF_ALLOC) != 0
1015 && (abfd->flags & DYNAMIC) != 0
1016 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1017 return false;
1018
1019 return true;
1020
1021 case SHT_DYNSYM: /* A dynamic symbol table */
1022 if (elf_dynsymtab (abfd) == shindex)
1023 return true;
1024
1025 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1026 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1027 elf_dynsymtab (abfd) = shindex;
1028 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
fd0198f0 1029 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
ede4eed4
KR		 1030 abfd->flags |= HAS_SYMS;
1031
1032 /* Besides being a symbol table, we also treat this as a regular
1033 section, so that objcopy can handle it. */
1034 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1035
1036 case SHT_STRTAB: /* A string table */
1037 if (hdr->bfd_section != NULL)
1038 return true;
1039 if (ehdr->e_shstrndx == shindex)
1040 {
1041 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1042 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1043 return true;
1044 }
1045 {
1046 unsigned int i;
1047
1048 for (i = 1; i < ehdr->e_shnum; i++)
1049 {
1050 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1051 if (hdr2->sh_link == shindex)
1052 {
1053 if (! bfd_section_from_shdr (abfd, i))
1054 return false;
1055 if (elf_onesymtab (abfd) == i)
1056 {
1057 elf_tdata (abfd)->strtab_hdr = *hdr;
1058 elf_elfsections (abfd)[shindex] =
1059 &elf_tdata (abfd)->strtab_hdr;
1060 return true;
1061 }
1062 if (elf_dynsymtab (abfd) == i)
1063 {
1064 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
fd0198f0 1065 elf_elfsections (abfd)[shindex] = hdr =
ede4eed4
KR		 1066 &elf_tdata (abfd)->dynstrtab_hdr;
1067 /* We also treat this as a regular section, so
1068 that objcopy can handle it. */
1069 break;
1070 }
1071#if 0 /* Not handling other string tables specially right now. */
1072 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
1073 /* We have a strtab for some random other section. */
1074 newsect = (asection *) hdr2->bfd_section;
1075 if (!newsect)
1076 break;
1077 hdr->bfd_section = newsect;
1078 hdr2 = &elf_section_data (newsect)->str_hdr;
1079 *hdr2 = *hdr;
1080 elf_elfsections (abfd)[shindex] = hdr2;
1081#endif
1082 }
1083 }
1084 }
1085
1086 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1087
1088 case SHT_REL:
1089 case SHT_RELA:
1090 /* *These* do a lot of work -- but build no sections! */
1091 {
1092 asection *target_sect;
1093 Elf_Internal_Shdr *hdr2;
ede4eed4 1094
ae115e51
ILT		 1095 /* For some incomprehensible reason Oracle distributes
1096 libraries for Solaris in which some of the objects have
1097 bogus sh_link fields. It would be nice if we could just
1098 reject them, but, unfortunately, some people need to use
1099 them. We scan through the section headers; if we find only
1100 one suitable symbol table, we clobber the sh_link to point
1101 to it. I hope this doesn't break anything. */
1102 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1103 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1104 {
1105 int scan;
1106 int found;
1107
1108 found = 0;
1109 for (scan = 1; scan < ehdr->e_shnum; scan++)
1110 {
1111 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1112 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1113 {
1114 if (found != 0)
1115 {
1116 found = 0;
1117 break;
1118 }
1119 found = scan;
1120 }
1121 }
1122 if (found != 0)
1123 hdr->sh_link = found;
1124 }
1125
ede4eed4 1126 /* Get the symbol table. */
ae115e51
ILT		 1127 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1128 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
ede4eed4
KR		 1129 return false;
1130
1131 /* If this reloc section does not use the main symbol table we
1132 don't treat it as a reloc section. BFD can't adequately
1133 represent such a section, so at least for now, we don't
1134 try. We just present it as a normal section. */
1135 if (hdr->sh_link != elf_onesymtab (abfd))
e85f2fbd 1136 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
ede4eed4 1137
ede4eed4
KR		 1138 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1139 return false;
1140 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1141 if (target_sect == NULL)
1142 return false;
1143
d1bf45aa
ILT		 1144 if ((target_sect->flags & SEC_RELOC) == 0
1145 || target_sect->reloc_count == 0)
1146 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1147 else
1148 {
1149 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1150 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2));
1151 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1152 }
ede4eed4
KR		 1153 *hdr2 = *hdr;
1154 elf_elfsections (abfd)[shindex] = hdr2;
d1bf45aa 1155 target_sect->reloc_count += hdr->sh_size / hdr->sh_entsize;
ede4eed4
KR		 1156 target_sect->flags |= SEC_RELOC;
1157 target_sect->relocation = NULL;
1158 target_sect->rel_filepos = hdr->sh_offset;
1159 abfd->flags |= HAS_RELOC;
1160 return true;
1161 }
1162 break;
1163
a66a61a0
ILT		 1164 case SHT_GNU_verdef:
1165 elf_dynverdef (abfd) = shindex;
1166 elf_tdata (abfd)->dynverdef_hdr = *hdr;
d6bfcdb5 1167 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
a66a61a0
ILT		 1168 break;
1169
1170 case SHT_GNU_versym:
1171 elf_dynversym (abfd) = shindex;
1172 elf_tdata (abfd)->dynversym_hdr = *hdr;
d6bfcdb5 1173 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
a66a61a0
ILT		 1174 break;
1175
1176 case SHT_GNU_verneed:
1177 elf_dynverref (abfd) = shindex;
1178 elf_tdata (abfd)->dynverref_hdr = *hdr;
d6bfcdb5 1179 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
a66a61a0
ILT		 1180 break;
1181
ede4eed4 1182 case SHT_SHLIB:
ede4eed4
KR		 1183 return true;
1184
1185 default:
1186 /* Check for any processor-specific section types. */
1187 {
1188 if (bed->elf_backend_section_from_shdr)
1189 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
1190 }
1191 break;
1192 }
1193
1194 return true;
1195}
1196
1197/* Given an ELF section number, retrieve the corresponding BFD
1198 section. */
1199
1200asection *
1201bfd_section_from_elf_index (abfd, index)
1202 bfd *abfd;
1203 unsigned int index;
1204{
1205 BFD_ASSERT (index > 0 && index < SHN_LORESERVE);
1206 if (index >= elf_elfheader (abfd)->e_shnum)
1207 return NULL;
1208 return elf_elfsections (abfd)[index]->bfd_section;
1209}
1210
1211boolean
1212_bfd_elf_new_section_hook (abfd, sec)
1213 bfd *abfd;
1214 asection *sec;
1215{
1216 struct bfd_elf_section_data *sdata;
1217
1218 sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata));
1219 if (!sdata)
a9713b91 1220 return false;
ede4eed4
KR		 1221 sec->used_by_bfd = (PTR) sdata;
1222 memset (sdata, 0, sizeof (*sdata));
1223 return true;
1224}
1225
1226/* Create a new bfd section from an ELF program header.
1227
1228 Since program segments have no names, we generate a synthetic name
1229 of the form segment<NUM>, where NUM is generally the index in the
1230 program header table. For segments that are split (see below) we
1231 generate the names segment<NUM>a and segment<NUM>b.
1232
1233 Note that some program segments may have a file size that is different than
1234 (less than) the memory size. All this means is that at execution the
1235 system must allocate the amount of memory specified by the memory size,
1236 but only initialize it with the first "file size" bytes read from the
1237 file. This would occur for example, with program segments consisting
1238 of combined data+bss.
1239
1240 To handle the above situation, this routine generates TWO bfd sections
1241 for the single program segment. The first has the length specified by
1242 the file size of the segment, and the second has the length specified
1243 by the difference between the two sizes. In effect, the segment is split
1244 into it's initialized and uninitialized parts.
1245
1246 */
1247
1248boolean
1249bfd_section_from_phdr (abfd, hdr, index)
1250 bfd *abfd;
1251 Elf_Internal_Phdr *hdr;
1252 int index;
1253{
1254 asection *newsect;
1255 char *name;
1256 char namebuf[64];
1257 int split;
1258
1259 split = ((hdr->p_memsz > 0) &&
1260 (hdr->p_filesz > 0) &&
1261 (hdr->p_memsz > hdr->p_filesz));
1262 sprintf (namebuf, split ? "segment%da" : "segment%d", index);
1263 name = bfd_alloc (abfd, strlen (namebuf) + 1);
1264 if (!name)
a9713b91 1265 return false;
ede4eed4
KR		 1266 strcpy (name, namebuf);
1267 newsect = bfd_make_section (abfd, name);
1268 if (newsect == NULL)
1269 return false;
1270 newsect->vma = hdr->p_vaddr;
ae115e51 1271 newsect->lma = hdr->p_paddr;
ede4eed4
KR		 1272 newsect->_raw_size = hdr->p_filesz;
1273 newsect->filepos = hdr->p_offset;
1274 newsect->flags |= SEC_HAS_CONTENTS;
1275 if (hdr->p_type == PT_LOAD)
1276 {
1277 newsect->flags |= SEC_ALLOC;
1278 newsect->flags |= SEC_LOAD;
1279 if (hdr->p_flags & PF_X)
1280 {
1281 /* FIXME: all we known is that it has execute PERMISSION,
1282 may be data. */
1283 newsect->flags |= SEC_CODE;
1284 }
1285 }
1286 if (!(hdr->p_flags & PF_W))
1287 {
1288 newsect->flags |= SEC_READONLY;
1289 }
1290
1291 if (split)
1292 {
1293 sprintf (namebuf, "segment%db", index);
1294 name = bfd_alloc (abfd, strlen (namebuf) + 1);
1295 if (!name)
a9713b91 1296 return false;
ede4eed4
KR		 1297 strcpy (name, namebuf);
1298 newsect = bfd_make_section (abfd, name);
1299 if (newsect == NULL)
1300 return false;
1301 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
ae115e51 1302 newsect->lma = hdr->p_paddr + hdr->p_filesz;
ede4eed4
KR		 1303 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
1304 if (hdr->p_type == PT_LOAD)
1305 {
1306 newsect->flags |= SEC_ALLOC;
1307 if (hdr->p_flags & PF_X)
1308 newsect->flags |= SEC_CODE;
1309 }
1310 if (!(hdr->p_flags & PF_W))
1311 newsect->flags |= SEC_READONLY;
1312 }
1313
1314 return true;
1315}
1316
1317/* Set up an ELF internal section header for a section. */
1318
1319/*ARGSUSED*/
1320static void
1321elf_fake_sections (abfd, asect, failedptrarg)
1322 bfd *abfd;
1323 asection *asect;
1324 PTR failedptrarg;
1325{
1326 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1327 boolean *failedptr = (boolean *) failedptrarg;
1328 Elf_Internal_Shdr *this_hdr;
1329
1330 if (*failedptr)
1331 {
1332 /* We already failed; just get out of the bfd_map_over_sections
1333 loop. */
1334 return;
1335 }
1336
1337 this_hdr = &elf_section_data (asect)->this_hdr;
1338
1339 this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd),
1340 asect->name,
1341 true, false);
1342 if (this_hdr->sh_name == (unsigned long) -1)
1343 {
1344 *failedptr = true;
1345 return;
1346 }
1347
1348 this_hdr->sh_flags = 0;
ae115e51 1349
50bd50d4
MH		 1350 if ((asect->flags & SEC_ALLOC) != 0
1351 || asect->user_set_vma)
fd0198f0 1352 this_hdr->sh_addr = asect->vma;
ede4eed4
KR		 1353 else
1354 this_hdr->sh_addr = 0;
ae115e51 1355
ede4eed4
KR		 1356 this_hdr->sh_offset = 0;
1357 this_hdr->sh_size = asect->_raw_size;
1358 this_hdr->sh_link = 0;
ede4eed4 1359 this_hdr->sh_addralign = 1 << asect->alignment_power;
fd0198f0
ILT		 1360 /* The sh_entsize and sh_info fields may have been set already by
1361 copy_private_section_data. */
ede4eed4
KR		 1362
1363 this_hdr->bfd_section = asect;
1364 this_hdr->contents = NULL;
1365
1366 /* FIXME: This should not be based on section names. */
1367 if (strcmp (asect->name, ".dynstr") == 0)
1368 this_hdr->sh_type = SHT_STRTAB;
1369 else if (strcmp (asect->name, ".hash") == 0)
1370 {
1371 this_hdr->sh_type = SHT_HASH;
1372 this_hdr->sh_entsize = bed->s->arch_size / 8;
1373 }
1374 else if (strcmp (asect->name, ".dynsym") == 0)
1375 {
1376 this_hdr->sh_type = SHT_DYNSYM;
1377 this_hdr->sh_entsize = bed->s->sizeof_sym;
1378 }
1379 else if (strcmp (asect->name, ".dynamic") == 0)
1380 {
1381 this_hdr->sh_type = SHT_DYNAMIC;
1382 this_hdr->sh_entsize = bed->s->sizeof_dyn;
1383 }
1384 else if (strncmp (asect->name, ".rela", 5) == 0
1385 && get_elf_backend_data (abfd)->use_rela_p)
1386 {
1387 this_hdr->sh_type = SHT_RELA;
1388 this_hdr->sh_entsize = bed->s->sizeof_rela;
1389 }
1390 else if (strncmp (asect->name, ".rel", 4) == 0
1391 && ! get_elf_backend_data (abfd)->use_rela_p)
1392 {
1393 this_hdr->sh_type = SHT_REL;
1394 this_hdr->sh_entsize = bed->s->sizeof_rel;
1395 }
a66a61a0 1396 else if (strncmp (asect->name, ".note", 5) == 0)
ede4eed4
KR		 1397 this_hdr->sh_type = SHT_NOTE;
1398 else if (strncmp (asect->name, ".stab", 5) == 0
1399 && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0)
1400 this_hdr->sh_type = SHT_STRTAB;
a66a61a0
ILT		 1401 else if (strcmp (asect->name, ".gnu.version") == 0)
1402 {
1403 this_hdr->sh_type = SHT_GNU_versym;
1404 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
1405 }
1406 else if (strcmp (asect->name, ".gnu.version_d") == 0)
1407 {
1408 this_hdr->sh_type = SHT_GNU_verdef;
1409 this_hdr->sh_entsize = 0;
d6bfcdb5
ILT		 1410 /* objcopy or strip will copy over sh_info, but may not set
1411 cverdefs. The linker will set cverdefs, but sh_info will be
1412 zero. */
1413 if (this_hdr->sh_info == 0)
1414 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
1415 else
1416 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
1417 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
a66a61a0
ILT		 1418 }
1419 else if (strcmp (asect->name, ".gnu.version_r") == 0)
1420 {
1421 this_hdr->sh_type = SHT_GNU_verneed;
1422 this_hdr->sh_entsize = 0;
d6bfcdb5
ILT		 1423 /* objcopy or strip will copy over sh_info, but may not set
1424 cverrefs. The linker will set cverrefs, but sh_info will be
1425 zero. */
1426 if (this_hdr->sh_info == 0)
1427 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
1428 else
1429 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
1430 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
a66a61a0 1431 }
ede4eed4
KR		 1432 else if ((asect->flags & SEC_ALLOC) != 0
1433 && (asect->flags & SEC_LOAD) != 0)
1434 this_hdr->sh_type = SHT_PROGBITS;
1435 else if ((asect->flags & SEC_ALLOC) != 0
1436 && ((asect->flags & SEC_LOAD) == 0))
5fe14a9f 1437 this_hdr->sh_type = SHT_NOBITS;
ede4eed4
KR		 1438 else
1439 {
1440 /* Who knows? */
1441 this_hdr->sh_type = SHT_PROGBITS;
1442 }
1443
1444 if ((asect->flags & SEC_ALLOC) != 0)
1445 this_hdr->sh_flags |= SHF_ALLOC;
1446 if ((asect->flags & SEC_READONLY) == 0)
1447 this_hdr->sh_flags |= SHF_WRITE;
1448 if ((asect->flags & SEC_CODE) != 0)
1449 this_hdr->sh_flags |= SHF_EXECINSTR;
1450
1451 /* Check for processor-specific section types. */
1452 {
1453 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1454
1455 if (bed->elf_backend_fake_sections)
1456 (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
1457 }
1458
1459 /* If the section has relocs, set up a section header for the
1460 SHT_REL[A] section. */
1461 if ((asect->flags & SEC_RELOC) != 0)
1462 {
1463 Elf_Internal_Shdr *rela_hdr;
1464 int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
1465 char *name;
1466
1467 rela_hdr = &elf_section_data (asect)->rel_hdr;
1468 name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name));
1469 if (name == NULL)
1470 {
ede4eed4
KR		 1471 *failedptr = true;
1472 return;
1473 }
1474 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
1475 rela_hdr->sh_name =
1476 (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name,
1477 true, false);
1478 if (rela_hdr->sh_name == (unsigned int) -1)
1479 {
1480 *failedptr = true;
1481 return;
1482 }
1483 rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
1484 rela_hdr->sh_entsize = (use_rela_p
1485 ? bed->s->sizeof_rela
1486 : bed->s->sizeof_rel);
1487 rela_hdr->sh_addralign = bed->s->file_align;
1488 rela_hdr->sh_flags = 0;
1489 rela_hdr->sh_addr = 0;
1490 rela_hdr->sh_size = 0;
1491 rela_hdr->sh_offset = 0;
1492 }
1493}
1494
1495/* Assign all ELF section numbers. The dummy first section is handled here
1496 too. The link/info pointers for the standard section types are filled
1497 in here too, while we're at it. */
1498
1499static boolean
1500assign_section_numbers (abfd)
1501 bfd *abfd;
1502{
1503 struct elf_obj_tdata *t = elf_tdata (abfd);
1504 asection *sec;
1505 unsigned int section_number;
1506 Elf_Internal_Shdr **i_shdrp;
1507 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1508
1509 section_number = 1;
1510
1511 for (sec = abfd->sections; sec; sec = sec->next)
1512 {
1513 struct bfd_elf_section_data *d = elf_section_data (sec);
1514
1515 d->this_idx = section_number++;
1516 if ((sec->flags & SEC_RELOC) == 0)
1517 d->rel_idx = 0;
1518 else
1519 d->rel_idx = section_number++;
1520 }
1521
1522 t->shstrtab_section = section_number++;
1523 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
1524 t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
1525
1526 if (abfd->symcount > 0)
1527 {
1528 t->symtab_section = section_number++;
1529 t->strtab_section = section_number++;
1530 }
1531
1532 elf_elfheader (abfd)->e_shnum = section_number;
1533
1534 /* Set up the list of section header pointers, in agreement with the
1535 indices. */
1536 i_shdrp = ((Elf_Internal_Shdr **)
1537 bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)));
1538 if (i_shdrp == NULL)
a9713b91 1539 return false;
ede4eed4
KR		 1540
1541 i_shdrp[0] = ((Elf_Internal_Shdr *)
1542 bfd_alloc (abfd, sizeof (Elf_Internal_Shdr)));
1543 if (i_shdrp[0] == NULL)
1544 {
1545 bfd_release (abfd, i_shdrp);
ede4eed4
KR		 1546 return false;
1547 }
1548 memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
1549
1550 elf_elfsections (abfd) = i_shdrp;
1551
1552 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
1553 if (abfd->symcount > 0)
1554 {
1555 i_shdrp[t->symtab_section] = &t->symtab_hdr;
1556 i_shdrp[t->strtab_section] = &t->strtab_hdr;
1557 t->symtab_hdr.sh_link = t->strtab_section;
1558 }
1559 for (sec = abfd->sections; sec; sec = sec->next)
1560 {
1561 struct bfd_elf_section_data *d = elf_section_data (sec);
1562 asection *s;
1563 const char *name;
1564
1565 i_shdrp[d->this_idx] = &d->this_hdr;
1566 if (d->rel_idx != 0)
1567 i_shdrp[d->rel_idx] = &d->rel_hdr;
1568
1569 /* Fill in the sh_link and sh_info fields while we're at it. */
1570
1571 /* sh_link of a reloc section is the section index of the symbol
1572 table. sh_info is the section index of the section to which
1573 the relocation entries apply. */
1574 if (d->rel_idx != 0)
1575 {
1576 d->rel_hdr.sh_link = t->symtab_section;
1577 d->rel_hdr.sh_info = d->this_idx;
1578 }
1579
1580 switch (d->this_hdr.sh_type)
1581 {
1582 case SHT_REL:
1583 case SHT_RELA:
1584 /* A reloc section which we are treating as a normal BFD
1585 section. sh_link is the section index of the symbol
1586 table. sh_info is the section index of the section to
1587 which the relocation entries apply. We assume that an
1588 allocated reloc section uses the dynamic symbol table.
1589 FIXME: How can we be sure? */
1590 s = bfd_get_section_by_name (abfd, ".dynsym");
1591 if (s != NULL)
1592 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1593
1594 /* We look up the section the relocs apply to by name. */
1595 name = sec->name;
1596 if (d->this_hdr.sh_type == SHT_REL)
1597 name += 4;
1598 else
1599 name += 5;
1600 s = bfd_get_section_by_name (abfd, name);
1601 if (s != NULL)
1602 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
1603 break;
1604
1605 case SHT_STRTAB:
1606 /* We assume that a section named .stab*str is a stabs
1607 string section. We look for a section with the same name
1608 but without the trailing ``str'', and set its sh_link
1609 field to point to this section. */
1610 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
1611 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
1612 {
1613 size_t len;
1614 char *alc;
1615
1616 len = strlen (sec->name);
58142f10 1617 alc = (char *) bfd_malloc (len - 2);
ede4eed4 1618 if (alc == NULL)
58142f10 1619 return false;
ede4eed4
KR		 1620 strncpy (alc, sec->name, len - 3);
1621 alc[len - 3] = '\0';
1622 s = bfd_get_section_by_name (abfd, alc);
1623 free (alc);
1624 if (s != NULL)
1625 {
1626 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
1627
1628 /* This is a .stab section. */
1629 elf_section_data (s)->this_hdr.sh_entsize =
1630 4 + 2 * (bed->s->arch_size / 8);
1631 }
1632 }
1633 break;
1634
1635 case SHT_DYNAMIC:
1636 case SHT_DYNSYM:
a66a61a0
ILT		 1637 case SHT_GNU_verneed:
1638 case SHT_GNU_verdef:
ede4eed4 1639 /* sh_link is the section header index of the string table
a66a61a0
ILT		 1640 used for the dynamic entries, or the symbol table, or the
1641 version strings. */
ede4eed4
KR		 1642 s = bfd_get_section_by_name (abfd, ".dynstr");
1643 if (s != NULL)
1644 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1645 break;
1646
1647 case SHT_HASH:
a66a61a0 1648 case SHT_GNU_versym:
ede4eed4 1649 /* sh_link is the section header index of the symbol table
a66a61a0 1650 this hash table or version table is for. */
ede4eed4
KR		 1651 s = bfd_get_section_by_name (abfd, ".dynsym");
1652 if (s != NULL)
1653 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1654 break;
1655 }
1656 }
1657
1658 return true;
1659}
1660
1661/* Map symbol from it's internal number to the external number, moving
1662 all local symbols to be at the head of the list. */
1663
1664static INLINE int
1665sym_is_global (abfd, sym)
1666 bfd *abfd;
1667 asymbol *sym;
1668{
1669 /* If the backend has a special mapping, use it. */
1670 if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
1671 return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
1672 (abfd, sym));
1673
1674 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
1675 || bfd_is_und_section (bfd_get_section (sym))
1676 || bfd_is_com_section (bfd_get_section (sym)));
1677}
1678
1679static boolean
1680elf_map_symbols (abfd)
1681 bfd *abfd;
1682{
1683 int symcount = bfd_get_symcount (abfd);
1684 asymbol **syms = bfd_get_outsymbols (abfd);
1685 asymbol **sect_syms;
1686 int num_locals = 0;
1687 int num_globals = 0;
1688 int num_locals2 = 0;
1689 int num_globals2 = 0;
1690 int max_index = 0;
1691 int num_sections = 0;
1692 int idx;
1693 asection *asect;
1694 asymbol **new_syms;
1695
1696#ifdef DEBUG
1697 fprintf (stderr, "elf_map_symbols\n");
1698 fflush (stderr);
1699#endif
1700
1701 /* Add a section symbol for each BFD section. FIXME: Is this really
1702 necessary? */
1703 for (asect = abfd->sections; asect; asect = asect->next)
1704 {
1705 if (max_index < asect->index)
1706 max_index = asect->index;
1707 }
1708
1709 max_index++;
1710 sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *));
1711 if (sect_syms == NULL)
a9713b91 1712 return false;
ede4eed4
KR		 1713 elf_section_syms (abfd) = sect_syms;
1714
1715 for (idx = 0; idx < symcount; idx++)
1716 {
1717 if ((syms[idx]->flags & BSF_SECTION_SYM) != 0
fd0198f0 1718 && (syms[idx]->value + syms[idx]->section->vma) == 0)
ede4eed4
KR		 1719 {
1720 asection *sec;
1721
1722 sec = syms[idx]->section;
1723 if (sec->owner != NULL)
1724 {
1725 if (sec->owner != abfd)
1726 {
1727 if (sec->output_offset != 0)
1728 continue;
1729 sec = sec->output_section;
1730 BFD_ASSERT (sec->owner == abfd);
1731 }
1732 sect_syms[sec->index] = syms[idx];
1733 }
1734 }
1735 }
1736
1737 for (asect = abfd->sections; asect; asect = asect->next)
1738 {
1739 asymbol *sym;
1740
1741 if (sect_syms[asect->index] != NULL)
1742 continue;
1743
1744 sym = bfd_make_empty_symbol (abfd);
1745 if (sym == NULL)
1746 return false;
1747 sym->the_bfd = abfd;
1748 sym->name = asect->name;
1749 sym->value = 0;
1750 /* Set the flags to 0 to indicate that this one was newly added. */
1751 sym->flags = 0;
1752 sym->section = asect;
1753 sect_syms[asect->index] = sym;
1754 num_sections++;
1755#ifdef DEBUG
1756 fprintf (stderr,
1757 "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n",
1758 asect->name, (long) asect->vma, asect->index, (long) asect);
1759#endif
1760 }
1761
1762 /* Classify all of the symbols. */
1763 for (idx = 0; idx < symcount; idx++)
1764 {
1765 if (!sym_is_global (abfd, syms[idx]))
1766 num_locals++;
1767 else
1768 num_globals++;
1769 }
1770 for (asect = abfd->sections; asect; asect = asect->next)
1771 {
1772 if (sect_syms[asect->index] != NULL
1773 && sect_syms[asect->index]->flags == 0)
1774 {
1775 sect_syms[asect->index]->flags = BSF_SECTION_SYM;
1776 if (!sym_is_global (abfd, sect_syms[asect->index]))
1777 num_locals++;
1778 else
1779 num_globals++;
1780 sect_syms[asect->index]->flags = 0;
1781 }
1782 }
1783
1784 /* Now sort the symbols so the local symbols are first. */
1785 new_syms = ((asymbol **)
1786 bfd_alloc (abfd,
1787 (num_locals + num_globals) * sizeof (asymbol *)));
1788 if (new_syms == NULL)
a9713b91 1789 return false;
ede4eed4
KR		 1790
1791 for (idx = 0; idx < symcount; idx++)
1792 {
1793 asymbol *sym = syms[idx];
1794 int i;
1795
1796 if (!sym_is_global (abfd, sym))
1797 i = num_locals2++;
1798 else
1799 i = num_locals + num_globals2++;
1800 new_syms[i] = sym;
1801 sym->udata.i = i + 1;
1802 }
1803 for (asect = abfd->sections; asect; asect = asect->next)
1804 {
1805 if (sect_syms[asect->index] != NULL
1806 && sect_syms[asect->index]->flags == 0)
1807 {
1808 asymbol *sym = sect_syms[asect->index];
1809 int i;
1810
1811 sym->flags = BSF_SECTION_SYM;
1812 if (!sym_is_global (abfd, sym))
1813 i = num_locals2++;
1814 else
1815 i = num_locals + num_globals2++;
1816 new_syms[i] = sym;
1817 sym->udata.i = i + 1;
1818 }
1819 }
1820
1821 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
1822
1823 elf_num_locals (abfd) = num_locals;
1824 elf_num_globals (abfd) = num_globals;
1825 return true;
1826}
1827
fd0198f0
ILT		 1828/* Align to the maximum file alignment that could be required for any
1829 ELF data structure. */
1830
1831static INLINE file_ptr align_file_position PARAMS ((file_ptr, int));
1832static INLINE file_ptr
1833align_file_position (off, align)
1834 file_ptr off;
1835 int align;
1836{
1837 return (off + align - 1) & ~(align - 1);
1838}
1839
1840/* Assign a file position to a section, optionally aligning to the
1841 required section alignment. */
1842
1843INLINE file_ptr
1844_bfd_elf_assign_file_position_for_section (i_shdrp, offset, align)
1845 Elf_Internal_Shdr *i_shdrp;
1846 file_ptr offset;
1847 boolean align;
1848{
1849 if (align)
1850 {
1851 unsigned int al;
1852
1853 al = i_shdrp->sh_addralign;
1854 if (al > 1)
1855 offset = BFD_ALIGN (offset, al);
1856 }
1857 i_shdrp->sh_offset = offset;
1858 if (i_shdrp->bfd_section != NULL)
1859 i_shdrp->bfd_section->filepos = offset;
1860 if (i_shdrp->sh_type != SHT_NOBITS)
1861 offset += i_shdrp->sh_size;
1862 return offset;
1863}
1864
ede4eed4
KR		 1865/* Compute the file positions we are going to put the sections at, and
1866 otherwise prepare to begin writing out the ELF file. If LINK_INFO
1867 is not NULL, this is being called by the ELF backend linker. */
1868
1869boolean
1870_bfd_elf_compute_section_file_positions (abfd, link_info)
1871 bfd *abfd;
1872 struct bfd_link_info *link_info;
1873{
1874 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1875 boolean failed;
1876 struct bfd_strtab_hash *strtab;
1877 Elf_Internal_Shdr *shstrtab_hdr;
1878
1879 if (abfd->output_has_begun)
1880 return true;
1881
1882 /* Do any elf backend specific processing first. */
1883 if (bed->elf_backend_begin_write_processing)
1884 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
1885
1886 if (! prep_headers (abfd))
1887 return false;
1888
1889 failed = false;
1890 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
1891 if (failed)
1892 return false;
1893
1894 if (!assign_section_numbers (abfd))
1895 return false;
1896
1897 /* The backend linker builds symbol table information itself. */
fd0198f0 1898 if (link_info == NULL && abfd->symcount > 0)
ede4eed4
KR		 1899 {
1900 if (! swap_out_syms (abfd, &strtab))
1901 return false;
1902 }
1903
1904 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
1905 /* sh_name was set in prep_headers. */
1906 shstrtab_hdr->sh_type = SHT_STRTAB;
1907 shstrtab_hdr->sh_flags = 0;
1908 shstrtab_hdr->sh_addr = 0;
1909 shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
1910 shstrtab_hdr->sh_entsize = 0;
1911 shstrtab_hdr->sh_link = 0;
1912 shstrtab_hdr->sh_info = 0;
fd0198f0 1913 /* sh_offset is set in assign_file_positions_except_relocs. */
ede4eed4
KR		 1914 shstrtab_hdr->sh_addralign = 1;
1915
fd0198f0 1916 if (!assign_file_positions_except_relocs (abfd))
ede4eed4
KR		 1917 return false;
1918
fd0198f0 1919 if (link_info == NULL && abfd->symcount > 0)
ede4eed4 1920 {
fd0198f0
ILT		 1921 file_ptr off;
1922 Elf_Internal_Shdr *hdr;
1923
1924 off = elf_tdata (abfd)->next_file_pos;
1925
1926 hdr = &elf_tdata (abfd)->symtab_hdr;
1927 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
1928
1929 hdr = &elf_tdata (abfd)->strtab_hdr;
1930 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
1931
1932 elf_tdata (abfd)->next_file_pos = off;
1933
ede4eed4
KR		 1934 /* Now that we know where the .strtab section goes, write it
1935 out. */
fd0198f0 1936 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
ede4eed4
KR		 1937 || ! _bfd_stringtab_emit (abfd, strtab))
1938 return false;
1939 _bfd_stringtab_free (strtab);
1940 }
1941
1942 abfd->output_has_begun = true;
1943
1944 return true;
1945}
1946
fd0198f0 1947/* Create a mapping from a set of sections to a program segment. */
ede4eed4 1948
fd0198f0 1949static INLINE struct elf_segment_map *
edf3fe48 1950make_mapping (abfd, sections, from, to, phdr)
fd0198f0
ILT		 1951 bfd *abfd;
1952 asection **sections;
1953 unsigned int from;
1954 unsigned int to;
edf3fe48 1955 boolean phdr;
ede4eed4 1956{
fd0198f0
ILT		 1957 struct elf_segment_map *m;
1958 unsigned int i;
1959 asection **hdrpp;
1960
1961 m = ((struct elf_segment_map *)
1962 bfd_zalloc (abfd,
1963 (sizeof (struct elf_segment_map)
1964 + (to - from - 1) * sizeof (asection *))));
1965 if (m == NULL)
a9713b91 1966 return NULL;
fd0198f0
ILT		 1967 m->next = NULL;
1968 m->p_type = PT_LOAD;
1969 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
1970 m->sections[i - from] = *hdrpp;
1971 m->count = to - from;
1972
edf3fe48 1973 if (from == 0 && phdr)
6933148a
ILT		 1974 {
1975 /* Include the headers in the first PT_LOAD segment. */
1976 m->includes_filehdr = 1;
1977 m->includes_phdrs = 1;
1978 }
1979
fd0198f0 1980 return m;
ede4eed4
KR		 1981}
1982
fd0198f0 1983/* Set up a mapping from BFD sections to program segments. */
ede4eed4 1984
fd0198f0
ILT		 1985static boolean
1986map_sections_to_segments (abfd)
1987 bfd *abfd;
ede4eed4 1988{
fd0198f0
ILT		 1989 asection **sections = NULL;
1990 asection *s;
1991 unsigned int i;
1992 unsigned int count;
1993 struct elf_segment_map *mfirst;
1994 struct elf_segment_map **pm;
1995 struct elf_segment_map *m;
1996 asection *last_hdr;
1997 unsigned int phdr_index;
1998 bfd_vma maxpagesize;
1999 asection **hdrpp;
edf3fe48
ILT		 2000 boolean phdr_in_section = true;
2001 boolean writable;
2002 asection *dynsec;
fd0198f0
ILT		 2003
2004 if (elf_tdata (abfd)->segment_map != NULL)
2005 return true;
2006
2007 if (bfd_count_sections (abfd) == 0)
2008 return true;
2009
2010 /* Select the allocated sections, and sort them. */
2011
58142f10
ILT		 2012 sections = (asection **) bfd_malloc (bfd_count_sections (abfd)
2013 * sizeof (asection *));
fd0198f0 2014 if (sections == NULL)
58142f10 2015 goto error_return;
ede4eed4 2016
fd0198f0
ILT		 2017 i = 0;
2018 for (s = abfd->sections; s != NULL; s = s->next)
2019 {
2020 if ((s->flags & SEC_ALLOC) != 0)
2021 {
2022 sections[i] = s;
2023 ++i;
2024 }
5fe14a9f 2025 }
fd0198f0
ILT		 2026 BFD_ASSERT (i <= bfd_count_sections (abfd));
2027 count = i;
ede4eed4 2028
fd0198f0 2029 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
ede4eed4 2030
fd0198f0 2031 /* Build the mapping. */
ede4eed4 2032
fd0198f0
ILT		 2033 mfirst = NULL;
2034 pm = &mfirst;
ede4eed4 2035
fd0198f0
ILT		 2036 /* If we have a .interp section, then create a PT_PHDR segment for
2037 the program headers and a PT_INTERP segment for the .interp
2038 section. */
2039 s = bfd_get_section_by_name (abfd, ".interp");
2040 if (s != NULL && (s->flags & SEC_LOAD) != 0)
2041 {
2042 m = ((struct elf_segment_map *)
2043 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2044 if (m == NULL)
a9713b91 2045 goto error_return;
fd0198f0
ILT		 2046 m->next = NULL;
2047 m->p_type = PT_PHDR;
2048 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
2049 m->p_flags = PF_R | PF_X;
2050 m->p_flags_valid = 1;
6933148a 2051 m->includes_phdrs = 1;
ede4eed4 2052
fd0198f0
ILT		 2053 *pm = m;
2054 pm = &m->next;
ede4eed4 2055
fd0198f0
ILT		 2056 m = ((struct elf_segment_map *)
2057 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2058 if (m == NULL)
a9713b91 2059 goto error_return;
fd0198f0
ILT		 2060 m->next = NULL;
2061 m->p_type = PT_INTERP;
2062 m->count = 1;
2063 m->sections[0] = s;
ede4eed4 2064
fd0198f0
ILT		 2065 *pm = m;
2066 pm = &m->next;
2067 }
ede4eed4 2068
fd0198f0
ILT		 2069 /* Look through the sections. We put sections in the same program
2070 segment when the start of the second section can be placed within
2071 a few bytes of the end of the first section. */
2072 last_hdr = NULL;
2073 phdr_index = 0;
2074 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
edf3fe48
ILT		 2075 writable = false;
2076 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
2077 if (dynsec != NULL
2078 && (dynsec->flags & SEC_LOAD) == 0)
2079 dynsec = NULL;
2080
7fc6a16a
ILT		 2081 /* Deal with -Ttext or something similar such that the first section
2082 is not adjacent to the program headers. This is an
2083 approximation, since at this point we don't know exactly how many
2084 program headers we will need. */
2085 if (count > 0)
2086 {
2087 bfd_size_type phdr_size;
2088
2089 phdr_size = elf_tdata (abfd)->program_header_size;
2090 if (phdr_size == 0)
2091 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
cdb88e87
ILT		 2092 if ((abfd->flags & D_PAGED) == 0
2093 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
7fc6a16a
ILT		 2094 phdr_in_section = false;
2095 }
edf3fe48 2096
fd0198f0 2097 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
ede4eed4 2098 {
fd0198f0 2099 asection *hdr;
191d910c 2100 boolean new_segment;
ede4eed4 2101
fd0198f0 2102 hdr = *hdrpp;
ede4eed4 2103
fd0198f0 2104 /* See if this section and the last one will fit in the same
191d910c
ILT		 2105 segment. */
2106
2107 if (last_hdr == NULL)
2108 {
2109 /* If we don't have a segment yet, then we don't need a new
2110 one (we build the last one after this loop). */
2111 new_segment = false;
2112 }
2113 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
2114 {
2115 /* If this section has a different relation between the
2116 virtual address and the load address, then we need a new
2117 segment. */
2118 new_segment = true;
2119 }
191d910c 2120 else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
76af94b9 2121 < BFD_ALIGN (hdr->lma, maxpagesize))
191d910c
ILT		 2122 {
2123 /* If putting this section in this segment would force us to
2124 skip a page in the segment, then we need a new segment. */
2125 new_segment = true;
2126 }
f0c12b73
DE		 2127 else if ((abfd->flags & D_PAGED) == 0)
2128 {
2129 /* If the file is not demand paged, which means that we
2130 don't require the sections to be correctly aligned in the
2131 file, then there is no other reason for a new segment. */
2132 new_segment = false;
2133 }
191d910c
ILT		 2134 else if ((last_hdr->flags & SEC_LOAD) == 0
2135 && (hdr->flags & SEC_LOAD) != 0)
2136 {
2137 /* We don't want to put a loadable section after a
2138 nonloadable section in the same segment. */
2139 new_segment = true;
2140 }
2141 else if (! writable
2142 && (hdr->flags & SEC_READONLY) == 0
2143 && (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
2144 == hdr->lma))
2145 {
2146 /* We don't want to put a writable section in a read only
2147 segment, unless they are on the same page in memory
2148 anyhow. We already know that the last section does not
2149 bring us past the current section on the page, so the
2150 only case in which the new section is not on the same
2151 page as the previous section is when the previous section
2152 ends precisely on a page boundary. */
2153 new_segment = true;
2154 }
2155 else
2156 {
2157 /* Otherwise, we can use the same segment. */
2158 new_segment = false;
2159 }
2160
2161 if (! new_segment)
fd0198f0 2162 {
50bd50d4
MH		 2163 if ((hdr->flags & SEC_READONLY) == 0)
2164 writable = true;
fd0198f0
ILT		 2165 last_hdr = hdr;
2166 continue;
2167 }
ede4eed4 2168
191d910c
ILT		 2169 /* We need a new program segment. We must create a new program
2170 header holding all the sections from phdr_index until hdr. */
ede4eed4 2171
edf3fe48 2172 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_section);
fd0198f0
ILT		 2173 if (m == NULL)
2174 goto error_return;
ede4eed4 2175
fd0198f0
ILT		 2176 *pm = m;
2177 pm = &m->next;
ede4eed4 2178
edf3fe48
ILT		 2179 if ((hdr->flags & SEC_READONLY) == 0)
2180 writable = true;
50bd50d4
MH		 2181 else
2182 writable = false;
edf3fe48 2183
fd0198f0
ILT		 2184 last_hdr = hdr;
2185 phdr_index = i;
edf3fe48 2186 phdr_in_section = false;
ede4eed4 2187 }
fd0198f0
ILT		 2188
2189 /* Create a final PT_LOAD program segment. */
2190 if (last_hdr != NULL)
ede4eed4 2191 {
edf3fe48 2192 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_section);
fd0198f0
ILT		 2193 if (m == NULL)
2194 goto error_return;
2195
2196 *pm = m;
2197 pm = &m->next;
ede4eed4
KR		 2198 }
2199
fd0198f0 2200 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
edf3fe48 2201 if (dynsec != NULL)
ede4eed4 2202 {
fd0198f0
ILT		 2203 m = ((struct elf_segment_map *)
2204 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2205 if (m == NULL)
a9713b91 2206 goto error_return;
fd0198f0
ILT		 2207 m->next = NULL;
2208 m->p_type = PT_DYNAMIC;
2209 m->count = 1;
edf3fe48 2210 m->sections[0] = dynsec;
ede4eed4 2211
fd0198f0
ILT		 2212 *pm = m;
2213 pm = &m->next;
ede4eed4
KR		 2214 }
2215
a66a61a0
ILT		 2216 /* For each loadable .note section, add a PT_NOTE segment. We don't
2217 use bfd_get_section_by_name, because if we link together
2218 nonloadable .note sections and loadable .note sections, we will
2219 generate two .note sections in the output file. FIXME: Using
2220 names for section types is bogus anyhow. */
2221 for (s = abfd->sections; s != NULL; s = s->next)
2222 {
2223 if ((s->flags & SEC_LOAD) != 0
2224 && strncmp (s->name, ".note", 5) == 0)
2225 {
2226 m = ((struct elf_segment_map *)
2227 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2228 if (m == NULL)
2229 goto error_return;
2230 m->next = NULL;
2231 m->p_type = PT_NOTE;
2232 m->count = 1;
2233 m->sections[0] = s;
2234
2235 *pm = m;
2236 pm = &m->next;
2237 }
2238 }
2239
fd0198f0
ILT		 2240 free (sections);
2241 sections = NULL;
ae115e51 2242
fd0198f0
ILT		 2243 elf_tdata (abfd)->segment_map = mfirst;
2244 return true;
2245
2246 error_return:
2247 if (sections != NULL)
2248 free (sections);
2249 return false;
ede4eed4
KR		 2250}
2251
fd0198f0 2252/* Sort sections by VMA. */
ede4eed4 2253
fd0198f0
ILT		 2254static int
2255elf_sort_sections (arg1, arg2)
2256 const PTR arg1;
2257 const PTR arg2;
ede4eed4 2258{
fd0198f0
ILT		 2259 const asection *sec1 = *(const asection **) arg1;
2260 const asection *sec2 = *(const asection **) arg2;
ede4eed4 2261
fd0198f0
ILT		 2262 if (sec1->vma < sec2->vma)
2263 return -1;
2264 else if (sec1->vma > sec2->vma)
2265 return 1;
ede4eed4 2266
cdb88e87
ILT		 2267 /* Sort by LMA. Normally the LMA and the VMA will be the same, and
2268 this will do nothing. */
2269 if (sec1->lma < sec2->lma)
2270 return -1;
2271 else if (sec1->lma > sec2->lma)
2272 return 1;
2273
fd0198f0 2274 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
ede4eed4 2275
fd0198f0 2276#define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
ede4eed4 2277
fd0198f0
ILT		 2278 if (TOEND (sec1))
2279 if (TOEND (sec2))
2280 return sec1->target_index - sec2->target_index;
2281 else
2282 return 1;
ede4eed4 2283
fd0198f0
ILT		 2284 if (TOEND (sec2))
2285 return -1;
ede4eed4 2286
fd0198f0 2287#undef TOEND
ede4eed4 2288
fd0198f0
ILT		 2289 /* Sort by size, to put zero sized sections before others at the
2290 same address. */
ede4eed4 2291
fd0198f0
ILT		 2292 if (sec1->_raw_size < sec2->_raw_size)
2293 return -1;
2294 if (sec1->_raw_size > sec2->_raw_size)
2295 return 1;
ede4eed4 2296
fd0198f0
ILT		 2297 return sec1->target_index - sec2->target_index;
2298}
ede4eed4 2299
fd0198f0
ILT		 2300/* Assign file positions to the sections based on the mapping from
2301 sections to segments. This function also sets up some fields in
2302 the file header, and writes out the program headers. */
ede4eed4 2303
fd0198f0
ILT		 2304static boolean
2305assign_file_positions_for_segments (abfd)
2306 bfd *abfd;
2307{
2308 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2309 unsigned int count;
2310 struct elf_segment_map *m;
2311 unsigned int alloc;
2312 Elf_Internal_Phdr *phdrs;
64f808f9 2313 file_ptr off, voff;
6933148a
ILT		 2314 bfd_vma filehdr_vaddr, filehdr_paddr;
2315 bfd_vma phdrs_vaddr, phdrs_paddr;
fd0198f0
ILT		 2316 Elf_Internal_Phdr *p;
2317
2318 if (elf_tdata (abfd)->segment_map == NULL)
2319 {
2320 if (! map_sections_to_segments (abfd))
2321 return false;
2322 }
ede4eed4 2323
5b3b9ff6
ILT		 2324 if (bed->elf_backend_modify_segment_map)
2325 {
2326 if (! (*bed->elf_backend_modify_segment_map) (abfd))
2327 return false;
2328 }
2329
fd0198f0
ILT		 2330 count = 0;
2331 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
2332 ++count;
ede4eed4 2333
fd0198f0
ILT		 2334 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
2335 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
2336 elf_elfheader (abfd)->e_phnum = count;
ede4eed4 2337
fd0198f0
ILT		 2338 if (count == 0)
2339 return true;
ede4eed4 2340
fd0198f0
ILT		 2341 /* If we already counted the number of program segments, make sure
2342 that we allocated enough space. This happens when SIZEOF_HEADERS
2343 is used in a linker script. */
2344 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
2345 if (alloc != 0 && count > alloc)
2346 {
2347 ((*_bfd_error_handler)
2348 ("%s: Not enough room for program headers (allocated %u, need %u)",
2349 bfd_get_filename (abfd), alloc, count));
2350 bfd_set_error (bfd_error_bad_value);
2351 return false;
ede4eed4
KR		 2352 }
2353
fd0198f0
ILT		 2354 if (alloc == 0)
2355 alloc = count;
2356
2357 phdrs = ((Elf_Internal_Phdr *)
2358 bfd_alloc (abfd, alloc * sizeof (Elf_Internal_Phdr)));
2359 if (phdrs == NULL)
a9713b91 2360 return false;
ede4eed4 2361
fd0198f0
ILT		 2362 off = bed->s->sizeof_ehdr;
2363 off += alloc * bed->s->sizeof_phdr;
ede4eed4 2364
6933148a
ILT		 2365 filehdr_vaddr = 0;
2366 filehdr_paddr = 0;
2367 phdrs_vaddr = 0;
2368 phdrs_paddr = 0;
fd0198f0
ILT		 2369 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
2370 m != NULL;
2371 m = m->next, p++)
2372 {
2373 unsigned int i;
2374 asection **secpp;
fd0198f0 2375
3b950780
ILT		 2376 /* If elf_segment_map is not from map_sections_to_segments, the
2377 sections may not be correctly ordered. */
2378 if (m->count > 0)
2379 qsort (m->sections, (size_t) m->count, sizeof (asection *),
2380 elf_sort_sections);
2381
fd0198f0
ILT		 2382 p->p_type = m->p_type;
2383
2384 if (m->p_flags_valid)
2385 p->p_flags = m->p_flags;
14899eb7
ILT		 2386 else
2387 p->p_flags = 0;
fd0198f0 2388
d49ddb85
ILT		 2389 if (p->p_type == PT_LOAD
2390 && m->count > 0
d7775b43 2391 && (m->sections[0]->flags & SEC_ALLOC) != 0)
cdb88e87
ILT		 2392 {
2393 if ((abfd->flags & D_PAGED) != 0)
2394 off += (m->sections[0]->vma - off) % bed->maxpagesize;
2395 else
2396 off += ((m->sections[0]->vma - off)
2397 % (1 << bfd_get_section_alignment (abfd, m->sections[0])));
2398 }
44ef8897 2399
fd0198f0
ILT		 2400 if (m->count == 0)
2401 p->p_vaddr = 0;
2402 else
2403 p->p_vaddr = m->sections[0]->vma;
ede4eed4 2404
fd0198f0
ILT		 2405 if (m->p_paddr_valid)
2406 p->p_paddr = m->p_paddr;
2407 else if (m->count == 0)
2408 p->p_paddr = 0;
2409 else
2410 p->p_paddr = m->sections[0]->lma;
2411
cdb88e87
ILT		 2412 if (p->p_type == PT_LOAD
2413 && (abfd->flags & D_PAGED) != 0)
fd0198f0
ILT		 2414 p->p_align = bed->maxpagesize;
2415 else if (m->count == 0)
2416 p->p_align = bed->s->file_align;
2417 else
2418 p->p_align = 0;
2419
6933148a 2420 p->p_offset = 0;
fd0198f0
ILT		 2421 p->p_filesz = 0;
2422 p->p_memsz = 0;
2423
6933148a 2424 if (m->includes_filehdr)
ede4eed4 2425 {
14899eb7
ILT		 2426 if (! m->p_flags_valid)
2427 p->p_flags |= PF_R;
6933148a
ILT		 2428 p->p_offset = 0;
2429 p->p_filesz = bed->s->sizeof_ehdr;
2430 p->p_memsz = bed->s->sizeof_ehdr;
2431 if (m->count > 0)
2432 {
2433 BFD_ASSERT (p->p_type == PT_LOAD);
2434 p->p_vaddr -= off;
2435 if (! m->p_paddr_valid)
2436 p->p_paddr -= off;
2437 }
2438 if (p->p_type == PT_LOAD)
2439 {
2440 filehdr_vaddr = p->p_vaddr;
2441 filehdr_paddr = p->p_paddr;
2442 }
2443 }
fd0198f0 2444
6933148a
ILT		 2445 if (m->includes_phdrs)
2446 {
14899eb7
ILT		 2447 if (! m->p_flags_valid)
2448 p->p_flags |= PF_R;
6933148a 2449 if (m->includes_filehdr)
fd0198f0 2450 {
6933148a 2451 if (p->p_type == PT_LOAD)
fd0198f0 2452 {
6933148a
ILT		 2453 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
2454 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
fd0198f0 2455 }
6933148a
ILT		 2456 }
2457 else
2458 {
2459 p->p_offset = bed->s->sizeof_ehdr;
2460 if (m->count > 0)
2461 {
2462 BFD_ASSERT (p->p_type == PT_LOAD);
2463 p->p_vaddr -= off - p->p_offset;
2464 if (! m->p_paddr_valid)
2465 p->p_paddr -= off - p->p_offset;
2466 }
2467 if (p->p_type == PT_LOAD)
fd0198f0 2468 {
6933148a
ILT		 2469 phdrs_vaddr = p->p_vaddr;
2470 phdrs_paddr = p->p_paddr;
fd0198f0 2471 }
6933148a
ILT		 2472 }
2473 p->p_filesz += alloc * bed->s->sizeof_phdr;
2474 p->p_memsz += alloc * bed->s->sizeof_phdr;
2475 }
2476
2477 if (p->p_type == PT_LOAD)
2478 {
2479 if (! m->includes_filehdr && ! m->includes_phdrs)
2480 p->p_offset = off;
2481 else
2482 {
2483 file_ptr adjust;
fd0198f0 2484
6933148a
ILT		 2485 adjust = off - (p->p_offset + p->p_filesz);
2486 p->p_filesz += adjust;
2487 p->p_memsz += adjust;
fd0198f0 2488 }
ede4eed4
KR		 2489 }
2490
64f808f9 2491 voff = off;
fd0198f0 2492 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
ede4eed4 2493 {
fd0198f0
ILT		 2494 asection *sec;
2495 flagword flags;
2496 bfd_size_type align;
2497
2498 sec = *secpp;
2499 flags = sec->flags;
cdb88e87 2500 align = 1 << bfd_get_section_alignment (abfd, sec);
fd0198f0
ILT		 2501
2502 if (p->p_type == PT_LOAD)
2503 {
2504 bfd_vma adjust;
2505
2506 /* The section VMA must equal the file position modulo
2507 the page size. */
09609415 2508 if ((flags & SEC_ALLOC) != 0)
fd0198f0 2509 {
cdb88e87
ILT		 2510 if ((abfd->flags & D_PAGED) != 0)
2511 adjust = (sec->vma - voff) % bed->maxpagesize;
2512 else
2513 adjust = (sec->vma - voff) % align;
d49ddb85
ILT		 2514 if (adjust != 0)
2515 {
2516 if (i == 0)
2517 abort ();
2518 p->p_memsz += adjust;
19bfbcbe 2519 off += adjust;
64f808f9 2520 voff += adjust;
d49ddb85 2521 if ((flags & SEC_LOAD) != 0)
19bfbcbe 2522 p->p_filesz += adjust;
d49ddb85 2523 }
fd0198f0
ILT		 2524 }
2525
2526 sec->filepos = off;
2527
2528 if ((flags & SEC_LOAD) != 0)
2529 off += sec->_raw_size;
64f808f9
ILT		 2530 if ((flags & SEC_ALLOC) != 0)
2531 voff += sec->_raw_size;
fd0198f0
ILT		 2532 }
2533
2534 p->p_memsz += sec->_raw_size;
2535
2536 if ((flags & SEC_LOAD) != 0)
2537 p->p_filesz += sec->_raw_size;
2538
fd0198f0
ILT		 2539 if (align > p->p_align)
2540 p->p_align = align;
2541
2542 if (! m->p_flags_valid)
2543 {
14899eb7 2544 p->p_flags |= PF_R;
fd0198f0
ILT		 2545 if ((flags & SEC_CODE) != 0)
2546 p->p_flags |= PF_X;
2547 if ((flags & SEC_READONLY) == 0)
2548 p->p_flags |= PF_W;
2549 }
ede4eed4 2550 }
fd0198f0 2551 }
ede4eed4 2552
fd0198f0
ILT		 2553 /* Now that we have set the section file positions, we can set up
2554 the file positions for the non PT_LOAD segments. */
2555 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
2556 m != NULL;
2557 m = m->next, p++)
2558 {
2559 if (p->p_type != PT_LOAD && m->count > 0)
ede4eed4 2560 {
6933148a
ILT		 2561 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
2562 p->p_offset = m->sections[0]->filepos;
2563 }
2564 if (m->count == 0)
2565 {
2566 if (m->includes_filehdr)
2567 {
2568 p->p_vaddr = filehdr_vaddr;
2569 if (! m->p_paddr_valid)
2570 p->p_paddr = filehdr_paddr;
2571 }
2572 else if (m->includes_phdrs)
2573 {
2574 p->p_vaddr = phdrs_vaddr;
2575 if (! m->p_paddr_valid)
2576 p->p_paddr = phdrs_paddr;
2577 }
ede4eed4 2578 }
ede4eed4
KR		 2579 }
2580
fd0198f0
ILT		 2581 /* Clear out any program headers we allocated but did not use. */
2582 for (; count < alloc; count++, p++)
ede4eed4 2583 {
fd0198f0
ILT		 2584 memset (p, 0, sizeof *p);
2585 p->p_type = PT_NULL;
ede4eed4
KR		 2586 }
2587
fd0198f0 2588 elf_tdata (abfd)->phdr = phdrs;
ede4eed4 2589
fd0198f0 2590 elf_tdata (abfd)->next_file_pos = off;
ede4eed4 2591
fd0198f0
ILT		 2592 /* Write out the program headers. */
2593 if (bfd_seek (abfd, bed->s->sizeof_ehdr, SEEK_SET) != 0
2594 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
2595 return false;
2596
2597 return true;
2598}
2599
2600/* Get the size of the program header.
2601
2602 If this is called by the linker before any of the section VMA's are set, it
2603 can't calculate the correct value for a strange memory layout. This only
2604 happens when SIZEOF_HEADERS is used in a linker script. In this case,
2605 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
2606 data segment (exclusive of .interp and .dynamic).
2607
2608 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
2609 will be two segments. */
2610
2611static bfd_size_type
2612get_program_header_size (abfd)
2613 bfd *abfd;
2614{
2615 size_t segs;
2616 asection *s;
2617 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2618
2619 /* We can't return a different result each time we're called. */
2620 if (elf_tdata (abfd)->program_header_size != 0)
2621 return elf_tdata (abfd)->program_header_size;
ae115e51 2622
3b950780
ILT		 2623 if (elf_tdata (abfd)->segment_map != NULL)
2624 {
2625 struct elf_segment_map *m;
2626
2627 segs = 0;
2628 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
2629 ++segs;
2630 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
2631 return elf_tdata (abfd)->program_header_size;
2632 }
2633
fd0198f0
ILT		 2634 /* Assume we will need exactly two PT_LOAD segments: one for text
2635 and one for data. */
2636 segs = 2;
2637
2638 s = bfd_get_section_by_name (abfd, ".interp");
2639 if (s != NULL && (s->flags & SEC_LOAD) != 0)
ede4eed4 2640 {
fd0198f0
ILT		 2641 /* If we have a loadable interpreter section, we need a
2642 PT_INTERP segment. In this case, assume we also need a
2643 PT_PHDR segment, although that may not be true for all
2644 targets. */
2645 segs += 2;
ede4eed4
KR		 2646 }
2647
fd0198f0 2648 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
ede4eed4 2649 {
fd0198f0
ILT		 2650 /* We need a PT_DYNAMIC segment. */
2651 ++segs;
ede4eed4 2652 }
ede4eed4 2653
a66a61a0
ILT		 2654 for (s = abfd->sections; s != NULL; s = s->next)
2655 {
2656 if ((s->flags & SEC_LOAD) != 0
2657 && strncmp (s->name, ".note", 5) == 0)
2658 {
2659 /* We need a PT_NOTE segment. */
2660 ++segs;
2661 }
2662 }
2663
fd0198f0 2664 /* Let the backend count up any program headers it might need. */
5b3b9ff6
ILT		 2665 if (bed->elf_backend_additional_program_headers)
2666 {
2667 int a;
2668
2669 a = (*bed->elf_backend_additional_program_headers) (abfd);
2670 if (a == -1)
2671 abort ();
2672 segs += a;
2673 }
ede4eed4 2674
fd0198f0
ILT		 2675 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
2676 return elf_tdata (abfd)->program_header_size;
ede4eed4
KR		 2677}
2678
2679/* Work out the file positions of all the sections. This is called by
2680 _bfd_elf_compute_section_file_positions. All the section sizes and
2681 VMAs must be known before this is called.
2682
2683 We do not consider reloc sections at this point, unless they form
2684 part of the loadable image. Reloc sections are assigned file
2685 positions in assign_file_positions_for_relocs, which is called by
2686 write_object_contents and final_link.
2687
fd0198f0 2688 We also don't set the positions of the .symtab and .strtab here. */
ede4eed4
KR		 2689
2690static boolean
fd0198f0 2691assign_file_positions_except_relocs (abfd)
ede4eed4 2692 bfd *abfd;
ede4eed4
KR		 2693{
2694 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
2695 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
2696 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
2697 file_ptr off;
2698 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2699
ede4eed4
KR		 2700 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
2701 {
2702 Elf_Internal_Shdr **hdrpp;
2703 unsigned int i;
2704
fd0198f0
ILT		 2705 /* Start after the ELF header. */
2706 off = i_ehdrp->e_ehsize;
2707
ede4eed4
KR		 2708 /* We are not creating an executable, which means that we are
2709 not creating a program header, and that the actual order of
2710 the sections in the file is unimportant. */
2711 for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
2712 {
2713 Elf_Internal_Shdr *hdr;
2714
2715 hdr = *hdrpp;
2716 if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
2717 {
2718 hdr->sh_offset = -1;
2719 continue;
2720 }
fd0198f0
ILT		 2721 if (i == tdata->symtab_section
2722 || i == tdata->strtab_section)
ede4eed4
KR		 2723 {
2724 hdr->sh_offset = -1;
2725 continue;
2726 }
2727
5fe14a9f 2728 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
ede4eed4
KR		 2729 }
2730 }
2731 else
2732 {
ede4eed4 2733 unsigned int i;
fd0198f0 2734 Elf_Internal_Shdr **hdrpp;
ede4eed4 2735
fd0198f0
ILT		 2736 /* Assign file positions for the loaded sections based on the
2737 assignment of sections to segments. */
2738 if (! assign_file_positions_for_segments (abfd))
ede4eed4
KR		 2739 return false;
2740
fd0198f0
ILT		 2741 /* Assign file positions for the other sections. */
2742
2743 off = elf_tdata (abfd)->next_file_pos;
2744 for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
ede4eed4
KR		 2745 {
2746 Elf_Internal_Shdr *hdr;
2747
2748 hdr = *hdrpp;
fd0198f0
ILT		 2749 if (hdr->bfd_section != NULL
2750 && hdr->bfd_section->filepos != 0)
2751 hdr->sh_offset = hdr->bfd_section->filepos;
2752 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
ede4eed4 2753 {
fd0198f0
ILT		 2754 ((*_bfd_error_handler)
2755 ("%s: warning: allocated section `%s' not in segment",
2756 bfd_get_filename (abfd),
2757 (hdr->bfd_section == NULL
2758 ? "*unknown*"
2759 : hdr->bfd_section->name)));
cdb88e87
ILT		 2760 if ((abfd->flags & D_PAGED) != 0)
2761 off += (hdr->sh_addr - off) % bed->maxpagesize;
2762 else
2763 off += (hdr->sh_addr - off) % hdr->sh_addralign;
5fe14a9f
ILT		 2764 off = _bfd_elf_assign_file_position_for_section (hdr, off,
2765 false);
ede4eed4 2766 }
fd0198f0
ILT		 2767 else if (hdr->sh_type == SHT_REL
2768 || hdr->sh_type == SHT_RELA
2769 || hdr == i_shdrpp[tdata->symtab_section]
2770 || hdr == i_shdrpp[tdata->strtab_section])
2771 hdr->sh_offset = -1;
2772 else
2773 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
2774 }
ede4eed4
KR		 2775 }
2776
2777 /* Place the section headers. */
2778 off = align_file_position (off, bed->s->file_align);
2779 i_ehdrp->e_shoff = off;
2780 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
2781
2782 elf_tdata (abfd)->next_file_pos = off;
2783
2784 return true;
2785}
2786
ede4eed4
KR		 2787static boolean
2788prep_headers (abfd)
2789 bfd *abfd;
2790{
2791 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
2792 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
2793 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
2794 int count;
2795 struct bfd_strtab_hash *shstrtab;
2796 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2797
2798 i_ehdrp = elf_elfheader (abfd);
2799 i_shdrp = elf_elfsections (abfd);
2800
2801 shstrtab = _bfd_elf_stringtab_init ();
2802 if (shstrtab == NULL)
2803 return false;
2804
2805 elf_shstrtab (abfd) = shstrtab;
2806
2807 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
2808 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
2809 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
2810 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
2811
2812 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
2813 i_ehdrp->e_ident[EI_DATA] =
86587dd4 2814 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
ede4eed4
KR		 2815 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
2816
2817 for (count = EI_PAD; count < EI_NIDENT; count++)
2818 i_ehdrp->e_ident[count] = 0;
2819
2820 if ((abfd->flags & DYNAMIC) != 0)
2821 i_ehdrp->e_type = ET_DYN;
2822 else if ((abfd->flags & EXEC_P) != 0)
2823 i_ehdrp->e_type = ET_EXEC;
2824 else
2825 i_ehdrp->e_type = ET_REL;
2826
2827 switch (bfd_get_arch (abfd))
2828 {
2829 case bfd_arch_unknown:
2830 i_ehdrp->e_machine = EM_NONE;
2831 break;
2832 case bfd_arch_sparc:
2833 if (bed->s->arch_size == 64)
2834 i_ehdrp->e_machine = EM_SPARC64;
2835 else
2836 i_ehdrp->e_machine = EM_SPARC;
2837 break;
2838 case bfd_arch_i386:
2839 i_ehdrp->e_machine = EM_386;
2840 break;
2841 case bfd_arch_m68k:
2842 i_ehdrp->e_machine = EM_68K;
2843 break;
2844 case bfd_arch_m88k:
2845 i_ehdrp->e_machine = EM_88K;
2846 break;
2847 case bfd_arch_i860:
2848 i_ehdrp->e_machine = EM_860;
2849 break;
2850 case bfd_arch_mips: /* MIPS Rxxxx */
2851 i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
2852 break;
2853 case bfd_arch_hppa:
2854 i_ehdrp->e_machine = EM_PARISC;
2855 break;
2856 case bfd_arch_powerpc:
2857 i_ehdrp->e_machine = EM_PPC;
2858 break;
50bd50d4
MH		 2859 case bfd_arch_alpha:
2860 i_ehdrp->e_machine = EM_ALPHA;
2861 break;
f0c12b73
DE		 2862 case bfd_arch_sh:
2863 i_ehdrp->e_machine = EM_SH;
2864 break;
50bd50d4
MH		 2865 case bfd_arch_d10v:
2866 i_ehdrp->e_machine = EM_CYGNUS_D10V;
2867 break;
fd8d7c31
MH		 2868/* start-sanitize-d30v */
2869 case bfd_arch_d30v:
2870 i_ehdrp->e_machine = EM_CYGNUS_D30V;
2871 break;
2872/* end-sanitize-d30v */
f0c12b73
DE		 2873/* start-sanitize-v850 */
2874 case bfd_arch_v850:
8988d935
NC		 2875 switch (bfd_get_mach (abfd))
2876 {
2877 default:
2878 case 0: i_ehdrp->e_machine = EM_CYGNUS_V850; break;
2879/* start-sanitize-v850e */
2880 case bfd_mach_v850e: i_ehdrp->e_machine = EM_CYGNUS_V850E; break;
2881/* end-sanitize-v850e */
2882/* start-sanitize-v850eq */
2883 case bfd_mach_v850eq: i_ehdrp->e_machine = EM_CYGNUS_V850EQ; break;
2884/* end-sanitize-v850eq */
2885 }
f0c12b73
DE		 2886 break;
2887/* end-sanitize-v850 */
8988d935 2888 case bfd_arch_arc:
ede4eed4
KR		 2889 i_ehdrp->e_machine = EM_CYGNUS_ARC;
2890 break;
f0c12b73
DE		 2891 case bfd_arch_m32r:
2892 i_ehdrp->e_machine = EM_CYGNUS_M32R;
2893 break;
80be821d
ILT		 2894 case bfd_arch_mn10200:
2895 i_ehdrp->e_machine = EM_CYGNUS_MN10200;
2896 break;
2897 case bfd_arch_mn10300:
2898 i_ehdrp->e_machine = EM_CYGNUS_MN10300;
efc2b064 2899 break;
ede4eed4
KR		 2900 /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
2901 default:
2902 i_ehdrp->e_machine = EM_NONE;
2903 }
2904 i_ehdrp->e_version = bed->s->ev_current;
2905 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
2906
2907 /* no program header, for now. */
2908 i_ehdrp->e_phoff = 0;
2909 i_ehdrp->e_phentsize = 0;
2910 i_ehdrp->e_phnum = 0;
2911
2912 /* each bfd section is section header entry */
2913 i_ehdrp->e_entry = bfd_get_start_address (abfd);
2914 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
2915
2916 /* if we're building an executable, we'll need a program header table */
2917 if (abfd->flags & EXEC_P)
2918 {
2919 /* it all happens later */
2920#if 0
2921 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
2922
2923 /* elf_build_phdrs() returns a (NULL-terminated) array of
2924 Elf_Internal_Phdrs */
2925 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
2926 i_ehdrp->e_phoff = outbase;
2927 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
2928#endif
2929 }
2930 else
2931 {
2932 i_ehdrp->e_phentsize = 0;
2933 i_phdrp = 0;
2934 i_ehdrp->e_phoff = 0;
2935 }
2936
2937 elf_tdata (abfd)->symtab_hdr.sh_name =
2938 (unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false);
2939 elf_tdata (abfd)->strtab_hdr.sh_name =
2940 (unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false);
2941 elf_tdata (abfd)->shstrtab_hdr.sh_name =
2942 (unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false);
2943 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
2944 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
2945 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
2946 return false;
2947
2948 return true;
2949}
2950
2951/* Assign file positions for all the reloc sections which are not part
2952 of the loadable file image. */
2953
2954void
2955_bfd_elf_assign_file_positions_for_relocs (abfd)
2956 bfd *abfd;
2957{
2958 file_ptr off;
2959 unsigned int i;
2960 Elf_Internal_Shdr **shdrpp;
2961
2962 off = elf_tdata (abfd)->next_file_pos;
2963
2964 for (i = 1, shdrpp = elf_elfsections (abfd) + 1;
2965 i < elf_elfheader (abfd)->e_shnum;
2966 i++, shdrpp++)
2967 {
2968 Elf_Internal_Shdr *shdrp;
2969
2970 shdrp = *shdrpp;
2971 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
2972 && shdrp->sh_offset == -1)
5fe14a9f 2973 off = _bfd_elf_assign_file_position_for_section (shdrp, off, true);
ede4eed4
KR		 2974 }
2975
2976 elf_tdata (abfd)->next_file_pos = off;
2977}
2978
2979boolean
2980_bfd_elf_write_object_contents (abfd)
2981 bfd *abfd;
2982{
2983 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2984 Elf_Internal_Ehdr *i_ehdrp;
2985 Elf_Internal_Shdr **i_shdrp;
2986 boolean failed;
2987 unsigned int count;
2988
2989 if (! abfd->output_has_begun
2990 && ! _bfd_elf_compute_section_file_positions (abfd,
2991 (struct bfd_link_info *) NULL))
2992 return false;
2993
2994 i_shdrp = elf_elfsections (abfd);
2995 i_ehdrp = elf_elfheader (abfd);
2996
2997 failed = false;
2998 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
2999 if (failed)
3000 return false;
3001 _bfd_elf_assign_file_positions_for_relocs (abfd);
3002
3003 /* After writing the headers, we need to write the sections too... */
3004 for (count = 1; count < i_ehdrp->e_shnum; count++)
3005 {
3006 if (bed->elf_backend_section_processing)
3007 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
3008 if (i_shdrp[count]->contents)
3009 {
3010 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
3011 || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size,
3012 1, abfd)
3013 != i_shdrp[count]->sh_size))
3014 return false;
3015 }
3016 }
3017
3018 /* Write out the section header names. */
3019 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
3020 || ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd)))
3021 return false;
3022
3023 if (bed->elf_backend_final_write_processing)
3024 (*bed->elf_backend_final_write_processing) (abfd,
3025 elf_tdata (abfd)->linker);
3026
3027 return bed->s->write_shdrs_and_ehdr (abfd);
3028}
3029
3030/* given a section, search the header to find them... */
3031int
3032_bfd_elf_section_from_bfd_section (abfd, asect)
3033 bfd *abfd;
3034 struct sec *asect;
3035{
3036 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3037 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
3038 int index;
3039 Elf_Internal_Shdr *hdr;
3040 int maxindex = elf_elfheader (abfd)->e_shnum;
3041
3042 for (index = 0; index < maxindex; index++)
3043 {
3044 hdr = i_shdrp[index];
3045 if (hdr->bfd_section == asect)
3046 return index;
3047 }
3048
3049 if (bed->elf_backend_section_from_bfd_section)
3050 {
3051 for (index = 0; index < maxindex; index++)
3052 {
3053 int retval;
3054
3055 hdr = i_shdrp[index];
3056 retval = index;
3057 if ((*bed->elf_backend_section_from_bfd_section)
3058 (abfd, hdr, asect, &retval))
3059 return retval;
3060 }
3061 }
3062
3063 if (bfd_is_abs_section (asect))
3064 return SHN_ABS;
3065 if (bfd_is_com_section (asect))
3066 return SHN_COMMON;
3067 if (bfd_is_und_section (asect))
3068 return SHN_UNDEF;
3069
3070 return -1;
3071}
3072
cb84f028
ILT		 3073/* Given a BFD symbol, return the index in the ELF symbol table, or -1
3074 on error. */
3075
3076int
ede4eed4
KR		 3077_bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
3078 bfd *abfd;
7fc6a16a 3079 asymbol **asym_ptr_ptr;
ede4eed4 3080{
7fc6a16a 3081 asymbol *asym_ptr = *asym_ptr_ptr;
ede4eed4
KR		 3082 int idx;
3083 flagword flags = asym_ptr->flags;
3084
3085 /* When gas creates relocations against local labels, it creates its
3086 own symbol for the section, but does put the symbol into the
3087 symbol chain, so udata is 0. When the linker is generating
3088 relocatable output, this section symbol may be for one of the
3089 input sections rather than the output section. */
3090 if (asym_ptr->udata.i == 0
3091 && (flags & BSF_SECTION_SYM)
3092 && asym_ptr->section)
3093 {
3094 int indx;
3095
3096 if (asym_ptr->section->output_section != NULL)
3097 indx = asym_ptr->section->output_section->index;
3098 else
3099 indx = asym_ptr->section->index;
3100 if (elf_section_syms (abfd)[indx])
3101 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
3102 }
3103
3104 idx = asym_ptr->udata.i;
cb84f028
ILT		 3105
3106 if (idx == 0)
3107 {
3108 /* This case can occur when using --strip-symbol on a symbol
3109 which is used in a relocation entry. */
3110 (*_bfd_error_handler)
3111 ("%s: symbol `%s' required but not present",
3112 bfd_get_filename (abfd), bfd_asymbol_name (asym_ptr));
3113 bfd_set_error (bfd_error_no_symbols);
3114 return -1;
3115 }
ede4eed4
KR		 3116
3117#if DEBUG & 4
3118 {
3119 fprintf (stderr,
3120 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
cb84f028
ILT		 3121 (long) asym_ptr, asym_ptr->name, idx, flags,
3122 elf_symbol_flags (flags));
ede4eed4
KR		 3123 fflush (stderr);
3124 }
3125#endif
3126
3127 return idx;
3128}
3129
3dbf33ee
ILT		 3130/* Copy private BFD data. This copies any program header information. */
3131
3132static boolean
3133copy_private_bfd_data (ibfd, obfd)
3134 bfd *ibfd;
3135 bfd *obfd;
3136{
6933148a 3137 Elf_Internal_Ehdr *iehdr;
3dbf33ee
ILT		 3138 struct elf_segment_map *mfirst;
3139 struct elf_segment_map **pm;
3140 Elf_Internal_Phdr *p;
3141 unsigned int i, c;
3142
3143 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3144 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3145 return true;
3146
3147 if (elf_tdata (ibfd)->phdr == NULL)
3148 return true;
3149
6933148a
ILT		 3150 iehdr = elf_elfheader (ibfd);
3151
3dbf33ee
ILT		 3152 mfirst = NULL;
3153 pm = &mfirst;
3154
3155 c = elf_elfheader (ibfd)->e_phnum;
3156 for (i = 0, p = elf_tdata (ibfd)->phdr; i < c; i++, p++)
3157 {
3dbf33ee 3158 unsigned int csecs;
6933148a
ILT		 3159 asection *s;
3160 struct elf_segment_map *m;
3161 unsigned int isec;
3dbf33ee
ILT		 3162
3163 csecs = 0;
3dbf33ee 3164
6933148a
ILT		 3165 /* The complicated case when p_vaddr is 0 is to handle the
3166 Solaris linker, which generates a PT_INTERP section with
3167 p_vaddr and p_memsz set to 0. */
3168 for (s = ibfd->sections; s != NULL; s = s->next)
3169 if (((s->vma >= p->p_vaddr
3170 && (s->vma + s->_raw_size <= p->p_vaddr + p->p_memsz
3171 || s->vma + s->_raw_size <= p->p_vaddr + p->p_filesz))
3172 || (p->p_vaddr == 0
3173 && p->p_filesz > 0
3174 && (s->flags & SEC_HAS_CONTENTS) != 0
3175 && (bfd_vma) s->filepos >= p->p_offset
3176 && ((bfd_vma) s->filepos + s->_raw_size
3177 <= p->p_offset + p->p_filesz)))
86587dd4 3178 && (s->flags & SEC_ALLOC) != 0
6933148a
ILT		 3179 && s->output_section != NULL)
3180 ++csecs;
3dbf33ee
ILT		 3181
3182 m = ((struct elf_segment_map *)
3183 bfd_alloc (obfd,
3184 (sizeof (struct elf_segment_map)
20db2495 3185 + ((size_t) csecs - 1) * sizeof (asection *))));
3dbf33ee 3186 if (m == NULL)
a9713b91 3187 return false;
3dbf33ee
ILT		 3188
3189 m->next = NULL;
3190 m->p_type = p->p_type;
3191 m->p_flags = p->p_flags;
3192 m->p_flags_valid = 1;
3193 m->p_paddr = p->p_paddr;
3194 m->p_paddr_valid = 1;
3195
6933148a
ILT		 3196 m->includes_filehdr = (p->p_offset == 0
3197 && p->p_filesz >= iehdr->e_ehsize);
3198
3199 m->includes_phdrs = (p->p_offset <= (bfd_vma) iehdr->e_phoff
3200 && (p->p_offset + p->p_filesz
3201 >= ((bfd_vma) iehdr->e_phoff
3202 + iehdr->e_phnum * iehdr->e_phentsize)));
3dbf33ee 3203
6933148a
ILT		 3204 isec = 0;
3205 for (s = ibfd->sections; s != NULL; s = s->next)
3206 {
3207 if (((s->vma >= p->p_vaddr
3208 && (s->vma + s->_raw_size <= p->p_vaddr + p->p_memsz
3209 || s->vma + s->_raw_size <= p->p_vaddr + p->p_filesz))
3210 || (p->p_vaddr == 0
3211 && p->p_filesz > 0
3212 && (s->flags & SEC_HAS_CONTENTS) != 0
3213 && (bfd_vma) s->filepos >= p->p_offset
3214 && ((bfd_vma) s->filepos + s->_raw_size
3215 <= p->p_offset + p->p_filesz)))
86587dd4 3216 && (s->flags & SEC_ALLOC) != 0
6933148a 3217 && s->output_section != NULL)
3dbf33ee 3218 {
6933148a
ILT		 3219 m->sections[isec] = s->output_section;
3220 ++isec;
3dbf33ee 3221 }
3dbf33ee 3222 }
6933148a 3223 BFD_ASSERT (isec == csecs);
6933148a 3224 m->count = csecs;
3dbf33ee
ILT		 3225
3226 *pm = m;
3227 pm = &m->next;
3228 }
3229
3230 elf_tdata (obfd)->segment_map = mfirst;
3231
3232 return true;
3233}
3234
fd0198f0
ILT		 3235/* Copy private section information. This copies over the entsize
3236 field, and sometimes the info field. */
3237
3238boolean
3239_bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
3240 bfd *ibfd;
3241 asection *isec;
3242 bfd *obfd;
3243 asection *osec;
3244{
3245 Elf_Internal_Shdr *ihdr, *ohdr;
3246
3247 if (ibfd->xvec->flavour != bfd_target_elf_flavour
3248 || obfd->xvec->flavour != bfd_target_elf_flavour)
3249 return true;
3250
3dbf33ee
ILT		 3251 /* Copy over private BFD data if it has not already been copied.
3252 This must be done here, rather than in the copy_private_bfd_data
3253 entry point, because the latter is called after the section
3254 contents have been set, which means that the program headers have
3255 already been worked out. */
3256 if (elf_tdata (obfd)->segment_map == NULL
3257 && elf_tdata (ibfd)->phdr != NULL)
3258 {
3259 asection *s;
3260
3261 /* Only set up the segments when all the sections have been set
3262 up. */
3263 for (s = ibfd->sections; s != NULL; s = s->next)
3264 if (s->output_section == NULL)
3265 break;
3266 if (s == NULL)
3267 {
3268 if (! copy_private_bfd_data (ibfd, obfd))
3269 return false;
3270 }
3271 }
3272
fd0198f0
ILT		 3273 ihdr = &elf_section_data (isec)->this_hdr;
3274 ohdr = &elf_section_data (osec)->this_hdr;
3275
3276 ohdr->sh_entsize = ihdr->sh_entsize;
3277
3278 if (ihdr->sh_type == SHT_SYMTAB
d6bfcdb5
ILT		 3279 || ihdr->sh_type == SHT_DYNSYM
3280 || ihdr->sh_type == SHT_GNU_verneed
3281 || ihdr->sh_type == SHT_GNU_verdef)
fd0198f0
ILT		 3282 ohdr->sh_info = ihdr->sh_info;
3283
3284 return true;
3285}
3286
3287/* Copy private symbol information. If this symbol is in a section
3288 which we did not map into a BFD section, try to map the section
3289 index correctly. We use special macro definitions for the mapped
3290 section indices; these definitions are interpreted by the
3291 swap_out_syms function. */
3292
3293#define MAP_ONESYMTAB (SHN_LORESERVE - 1)
3294#define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
3295#define MAP_STRTAB (SHN_LORESERVE - 3)
3296#define MAP_SHSTRTAB (SHN_LORESERVE - 4)
3297
3298boolean
3299_bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg)
3300 bfd *ibfd;
3301 asymbol *isymarg;
3302 bfd *obfd;
3303 asymbol *osymarg;
3304{
3305 elf_symbol_type *isym, *osym;
3306
efc2b064
JL		 3307 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3308 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3309 return true;
3310
fd0198f0
ILT		 3311 isym = elf_symbol_from (ibfd, isymarg);
3312 osym = elf_symbol_from (obfd, osymarg);
3313
3314 if (isym != NULL
3315 && osym != NULL
3316 && bfd_is_abs_section (isym->symbol.section))
3317 {
3318 unsigned int shndx;
3319
3320 shndx = isym->internal_elf_sym.st_shndx;
3321 if (shndx == elf_onesymtab (ibfd))
3322 shndx = MAP_ONESYMTAB;
3323 else if (shndx == elf_dynsymtab (ibfd))
3324 shndx = MAP_DYNSYMTAB;
3325 else if (shndx == elf_tdata (ibfd)->strtab_section)
3326 shndx = MAP_STRTAB;
3327 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
3328 shndx = MAP_SHSTRTAB;
3329 osym->internal_elf_sym.st_shndx = shndx;
3330 }
3331
3332 return true;
3333}
3334
3335/* Swap out the symbols. */
3336
ede4eed4
KR		 3337static boolean
3338swap_out_syms (abfd, sttp)
3339 bfd *abfd;
3340 struct bfd_strtab_hash **sttp;
3341{
3342 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3343
3344 if (!elf_map_symbols (abfd))
3345 return false;
3346
3347 /* Dump out the symtabs. */
3348 {
3349 int symcount = bfd_get_symcount (abfd);
3350 asymbol **syms = bfd_get_outsymbols (abfd);
3351 struct bfd_strtab_hash *stt;
3352 Elf_Internal_Shdr *symtab_hdr;
3353 Elf_Internal_Shdr *symstrtab_hdr;
3354 char *outbound_syms;
3355 int idx;
3356
3357 stt = _bfd_elf_stringtab_init ();
3358 if (stt == NULL)
3359 return false;
3360
3361 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3362 symtab_hdr->sh_type = SHT_SYMTAB;
3363 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
3364 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
3365 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
3366 symtab_hdr->sh_addralign = bed->s->file_align;
3367
3368 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
3369 symstrtab_hdr->sh_type = SHT_STRTAB;
3370
3371 outbound_syms = bfd_alloc (abfd,
3372 (1 + symcount) * bed->s->sizeof_sym);
3373 if (outbound_syms == NULL)
a9713b91 3374 return false;
ede4eed4
KR		 3375 symtab_hdr->contents = (PTR) outbound_syms;
3376
3377 /* now generate the data (for "contents") */
3378 {
3379 /* Fill in zeroth symbol and swap it out. */
3380 Elf_Internal_Sym sym;
3381 sym.st_name = 0;
3382 sym.st_value = 0;
3383 sym.st_size = 0;
3384 sym.st_info = 0;
3385 sym.st_other = 0;
3386 sym.st_shndx = SHN_UNDEF;
cf9fb9f2 3387 bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
ede4eed4
KR		 3388 outbound_syms += bed->s->sizeof_sym;
3389 }
3390 for (idx = 0; idx < symcount; idx++)
3391 {
3392 Elf_Internal_Sym sym;
3393 bfd_vma value = syms[idx]->value;
3394 elf_symbol_type *type_ptr;
3395 flagword flags = syms[idx]->flags;
052b35d2 3396 int type;
ede4eed4
KR		 3397
3398 if (flags & BSF_SECTION_SYM)
3399 /* Section symbols have no names. */
3400 sym.st_name = 0;
3401 else
3402 {
3403 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
3404 syms[idx]->name,
3405 true, false);
3406 if (sym.st_name == (unsigned long) -1)
3407 return false;
3408 }
3409
3410 type_ptr = elf_symbol_from (abfd, syms[idx]);
3411
3412 if (bfd_is_com_section (syms[idx]->section))
3413 {
3414 /* ELF common symbols put the alignment into the `value' field,
3415 and the size into the `size' field. This is backwards from
3416 how BFD handles it, so reverse it here. */
3417 sym.st_size = value;
3418 if (type_ptr == NULL
3419 || type_ptr->internal_elf_sym.st_value == 0)
3420 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
3421 else
3422 sym.st_value = type_ptr->internal_elf_sym.st_value;
3423 sym.st_shndx = _bfd_elf_section_from_bfd_section (abfd,
3424 syms[idx]->section);
3425 }
3426 else
3427 {
3428 asection *sec = syms[idx]->section;
3429 int shndx;
3430
3431 if (sec->output_section)
3432 {
3433 value += sec->output_offset;
3434 sec = sec->output_section;
3435 }
3436 value += sec->vma;
3437 sym.st_value = value;
3438 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
fd0198f0
ILT		 3439
3440 if (bfd_is_abs_section (sec)
3441 && type_ptr != NULL
3442 && type_ptr->internal_elf_sym.st_shndx != 0)
ede4eed4 3443 {
fd0198f0
ILT		 3444 /* This symbol is in a real ELF section which we did
3445 not create as a BFD section. Undo the mapping done
3446 by copy_private_symbol_data. */
3447 shndx = type_ptr->internal_elf_sym.st_shndx;
3448 switch (shndx)
3449 {
3450 case MAP_ONESYMTAB:
3451 shndx = elf_onesymtab (abfd);
3452 break;
3453 case MAP_DYNSYMTAB:
3454 shndx = elf_dynsymtab (abfd);
3455 break;
3456 case MAP_STRTAB:
3457 shndx = elf_tdata (abfd)->strtab_section;
3458 break;
3459 case MAP_SHSTRTAB:
3460 shndx = elf_tdata (abfd)->shstrtab_section;
3461 break;
3462 default:
3463 break;
3464 }
3465 }
3466 else
3467 {
3468 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3469
3470 if (shndx == -1)
3471 {
3472 asection *sec2;
3473
3474 /* Writing this would be a hell of a lot easier if
3475 we had some decent documentation on bfd, and
3476 knew what to expect of the library, and what to
3477 demand of applications. For example, it
3478 appears that `objcopy' might not set the
3479 section of a symbol to be a section that is
3480 actually in the output file. */
3481 sec2 = bfd_get_section_by_name (abfd, sec->name);
3482 BFD_ASSERT (sec2 != 0);
3483 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
3484 BFD_ASSERT (shndx != -1);
3485 }
ede4eed4 3486 }
fd0198f0
ILT		 3487
3488 sym.st_shndx = shndx;
ede4eed4
KR		 3489 }
3490
052b35d2
ILT		 3491 if ((flags & BSF_FUNCTION) != 0)
3492 type = STT_FUNC;
3493 else if ((flags & BSF_OBJECT) != 0)
3494 type = STT_OBJECT;
3495 else
3496 type = STT_NOTYPE;
3497
ede4eed4 3498 if (bfd_is_com_section (syms[idx]->section))
052b35d2 3499 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
ede4eed4
KR		 3500 else if (bfd_is_und_section (syms[idx]->section))
3501 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
3502 ? STB_WEAK
3503 : STB_GLOBAL),
052b35d2 3504 type);
ede4eed4
KR		 3505 else if (flags & BSF_SECTION_SYM)
3506 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
3507 else if (flags & BSF_FILE)
3508 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
3509 else
3510 {
3511 int bind = STB_LOCAL;
ede4eed4
KR		 3512
3513 if (flags & BSF_LOCAL)
3514 bind = STB_LOCAL;
3515 else if (flags & BSF_WEAK)
3516 bind = STB_WEAK;
3517 else if (flags & BSF_GLOBAL)
3518 bind = STB_GLOBAL;
3519
ede4eed4
KR		 3520 sym.st_info = ELF_ST_INFO (bind, type);
3521 }
3522
80be821d
ILT		 3523 if (type_ptr != NULL)
3524 sym.st_other = type_ptr->internal_elf_sym.st_other;
3525 else
3526 sym.st_other = 0;
3527
cf9fb9f2 3528 bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
ede4eed4
KR		 3529 outbound_syms += bed->s->sizeof_sym;
3530 }
3531
3532 *sttp = stt;
3533 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
3534 symstrtab_hdr->sh_type = SHT_STRTAB;
3535
3536 symstrtab_hdr->sh_flags = 0;
3537 symstrtab_hdr->sh_addr = 0;
3538 symstrtab_hdr->sh_entsize = 0;
3539 symstrtab_hdr->sh_link = 0;
3540 symstrtab_hdr->sh_info = 0;
3541 symstrtab_hdr->sh_addralign = 1;
3542 }
3543
3544 return true;
3545}
3546
3547/* Return the number of bytes required to hold the symtab vector.
3548
3549 Note that we base it on the count plus 1, since we will null terminate
3550 the vector allocated based on this size. However, the ELF symbol table
3551 always has a dummy entry as symbol #0, so it ends up even. */
3552
3553long
3554_bfd_elf_get_symtab_upper_bound (abfd)
3555 bfd *abfd;
3556{
3557 long symcount;
3558 long symtab_size;
3559 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
3560
3561 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
3562 symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
3563
3564 return symtab_size;
3565}
3566
3567long
3568_bfd_elf_get_dynamic_symtab_upper_bound (abfd)
3569 bfd *abfd;
3570{
3571 long symcount;
3572 long symtab_size;
3573 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
3574
3575 if (elf_dynsymtab (abfd) == 0)
3576 {
3577 bfd_set_error (bfd_error_invalid_operation);
3578 return -1;
3579 }
3580
3581 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
3582 symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
3583
3584 return symtab_size;
3585}
3586
3587long
3588_bfd_elf_get_reloc_upper_bound (abfd, asect)
3589 bfd *abfd;
3590 sec_ptr asect;
3591{
3592 return (asect->reloc_count + 1) * sizeof (arelent *);
3593}
3594
3595/* Canonicalize the relocs. */
3596
3597long
3598_bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols)
3599 bfd *abfd;
3600 sec_ptr section;
3601 arelent **relptr;
3602 asymbol **symbols;
3603{
3604 arelent *tblptr;
3605 unsigned int i;
3606
e35765a9
ILT		 3607 if (! get_elf_backend_data (abfd)->s->slurp_reloc_table (abfd,
3608 section,
3609 symbols,
3610 false))
ede4eed4
KR		 3611 return -1;
3612
3613 tblptr = section->relocation;
3614 for (i = 0; i < section->reloc_count; i++)
3615 *relptr++ = tblptr++;
3616
3617 *relptr = NULL;
3618
3619 return section->reloc_count;
3620}
3621
3622long
3623_bfd_elf_get_symtab (abfd, alocation)
3624 bfd *abfd;
3625 asymbol **alocation;
3626{
3627 long symcount = get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, false);
3628
3629 if (symcount >= 0)
3630 bfd_get_symcount (abfd) = symcount;
3631 return symcount;
3632}
3633
3634long
3635_bfd_elf_canonicalize_dynamic_symtab (abfd, alocation)
3636 bfd *abfd;
3637 asymbol **alocation;
3638{
3639 return get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, true);
3640}
3641
e35765a9
ILT		 3642/* Return the size required for the dynamic reloc entries. Any
3643 section that was actually installed in the BFD, and has type
3644 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
3645 considered to be a dynamic reloc section. */
3646
3647long
3648_bfd_elf_get_dynamic_reloc_upper_bound (abfd)
3649 bfd *abfd;
3650{
3651 long ret;
3652 asection *s;
3653
3654 if (elf_dynsymtab (abfd) == 0)
3655 {
3656 bfd_set_error (bfd_error_invalid_operation);
3657 return -1;
3658 }
3659
3660 ret = sizeof (arelent *);
3661 for (s = abfd->sections; s != NULL; s = s->next)
3662 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
3663 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
3664 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
3665 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
3666 * sizeof (arelent *));
3667
3668 return ret;
3669}
3670
3671/* Canonicalize the dynamic relocation entries. Note that we return
3672 the dynamic relocations as a single block, although they are
3673 actually associated with particular sections; the interface, which
3674 was designed for SunOS style shared libraries, expects that there
3675 is only one set of dynamic relocs. Any section that was actually
3676 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
3677 the dynamic symbol table, is considered to be a dynamic reloc
3678 section. */
3679
3680long
3681_bfd_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
3682 bfd *abfd;
3683 arelent **storage;
3684 asymbol **syms;
3685{
3686 boolean (*slurp_relocs) PARAMS ((bfd *, asection *, asymbol **, boolean));
3687 asection *s;
3688 long ret;
3689
3690 if (elf_dynsymtab (abfd) == 0)
3691 {
3692 bfd_set_error (bfd_error_invalid_operation);
3693 return -1;
3694 }
3695
3696 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3697 ret = 0;
3698 for (s = abfd->sections; s != NULL; s = s->next)
3699 {
3700 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
3701 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
3702 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
3703 {
3704 arelent *p;
3705 long count, i;
3706
3707 if (! (*slurp_relocs) (abfd, s, syms, true))
3708 return -1;
3709 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
3710 p = s->relocation;
3711 for (i = 0; i < count; i++)
3712 *storage++ = p++;
3713 ret += count;
3714 }
3715 }
3716
3717 *storage = NULL;
3718
3719 return ret;
3720}
a66a61a0
ILT		 3721\f
3722/* Read in the version information. */
3723
3724boolean
3725_bfd_elf_slurp_version_tables (abfd)
3726 bfd *abfd;
3727{
3728 bfd_byte *contents = NULL;
3729
3730 if (elf_dynverdef (abfd) != 0)
3731 {
3732 Elf_Internal_Shdr *hdr;
3733 Elf_External_Verdef *everdef;
3734 Elf_Internal_Verdef *iverdef;
3735 unsigned int i;
3736
3737 hdr = &elf_tdata (abfd)->dynverdef_hdr;
3738
3739 elf_tdata (abfd)->verdef =
3740 ((Elf_Internal_Verdef *)
3741 bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verdef)));
3742 if (elf_tdata (abfd)->verdef == NULL)
3743 goto error_return;
3744
3745 elf_tdata (abfd)->cverdefs = hdr->sh_info;
e35765a9 3746
a66a61a0
ILT		 3747 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
3748 if (contents == NULL)
3749 goto error_return;
3750 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3751 || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size)
3752 goto error_return;
3753
3754 everdef = (Elf_External_Verdef *) contents;
3755 iverdef = elf_tdata (abfd)->verdef;
3756 for (i = 0; i < hdr->sh_info; i++, iverdef++)
3757 {
3758 Elf_External_Verdaux *everdaux;
3759 Elf_Internal_Verdaux *iverdaux;
3760 unsigned int j;
3761
3762 _bfd_elf_swap_verdef_in (abfd, everdef, iverdef);
3763
3764 iverdef->vd_bfd = abfd;
3765
3766 iverdef->vd_auxptr = ((Elf_Internal_Verdaux *)
3767 bfd_alloc (abfd,
3768 (iverdef->vd_cnt
3769 * sizeof (Elf_Internal_Verdaux))));
3770 if (iverdef->vd_auxptr == NULL)
3771 goto error_return;
3772
3773 everdaux = ((Elf_External_Verdaux *)
3774 ((bfd_byte *) everdef + iverdef->vd_aux));
3775 iverdaux = iverdef->vd_auxptr;
3776 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
3777 {
3778 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
3779
3780 iverdaux->vda_nodename =
3781 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
3782 iverdaux->vda_name);
3783 if (iverdaux->vda_nodename == NULL)
3784 goto error_return;
3785
3786 if (j + 1 < iverdef->vd_cnt)
3787 iverdaux->vda_nextptr = iverdaux + 1;
3788 else
3789 iverdaux->vda_nextptr = NULL;
3790
3791 everdaux = ((Elf_External_Verdaux *)
3792 ((bfd_byte *) everdaux + iverdaux->vda_next));
3793 }
3794
3795 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
3796
3797 if (i + 1 < hdr->sh_info)
3798 iverdef->vd_nextdef = iverdef + 1;
3799 else
3800 iverdef->vd_nextdef = NULL;
3801
3802 everdef = ((Elf_External_Verdef *)
3803 ((bfd_byte *) everdef + iverdef->vd_next));
3804 }
3805
3806 free (contents);
3807 contents = NULL;
3808 }
3809
3810 if (elf_dynverref (abfd) != 0)
3811 {
3812 Elf_Internal_Shdr *hdr;
3813 Elf_External_Verneed *everneed;
3814 Elf_Internal_Verneed *iverneed;
3815 unsigned int i;
3816
3817 hdr = &elf_tdata (abfd)->dynverref_hdr;
3818
3819 elf_tdata (abfd)->verref =
3820 ((Elf_Internal_Verneed *)
3821 bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verneed)));
3822 if (elf_tdata (abfd)->verref == NULL)
3823 goto error_return;
3824
3825 elf_tdata (abfd)->cverrefs = hdr->sh_info;
3826
3827 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
3828 if (contents == NULL)
3829 goto error_return;
3830 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3831 || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size)
3832 goto error_return;
3833
3834 everneed = (Elf_External_Verneed *) contents;
3835 iverneed = elf_tdata (abfd)->verref;
3836 for (i = 0; i < hdr->sh_info; i++, iverneed++)
3837 {
3838 Elf_External_Vernaux *evernaux;
3839 Elf_Internal_Vernaux *ivernaux;
3840 unsigned int j;
3841
3842 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
3843
3844 iverneed->vn_bfd = abfd;
3845
3846 iverneed->vn_filename =
3847 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
3848 iverneed->vn_file);
3849 if (iverneed->vn_filename == NULL)
3850 goto error_return;
3851
3852 iverneed->vn_auxptr =
3853 ((Elf_Internal_Vernaux *)
3854 bfd_alloc (abfd,
3855 iverneed->vn_cnt * sizeof (Elf_Internal_Vernaux)));
3856
3857 evernaux = ((Elf_External_Vernaux *)
3858 ((bfd_byte *) everneed + iverneed->vn_aux));
3859 ivernaux = iverneed->vn_auxptr;
3860 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
3861 {
3862 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
3863
3864 ivernaux->vna_nodename =
3865 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
3866 ivernaux->vna_name);
3867 if (ivernaux->vna_nodename == NULL)
3868 goto error_return;
3869
3870 if (j + 1 < iverneed->vn_cnt)
3871 ivernaux->vna_nextptr = ivernaux + 1;
3872 else
3873 ivernaux->vna_nextptr = NULL;
3874
3875 evernaux = ((Elf_External_Vernaux *)
3876 ((bfd_byte *) evernaux + ivernaux->vna_next));
3877 }
3878
3879 if (i + 1 < hdr->sh_info)
3880 iverneed->vn_nextref = iverneed + 1;
3881 else
3882 iverneed->vn_nextref = NULL;
3883
3884 everneed = ((Elf_External_Verneed *)
3885 ((bfd_byte *) everneed + iverneed->vn_next));
3886 }
3887
3888 free (contents);
3889 contents = NULL;
3890 }
3891
3892 return true;
3893
3894 error_return:
3895 if (contents == NULL)
3896 free (contents);
3897 return false;
3898}
3899\f
ede4eed4
KR		 3900asymbol *
3901_bfd_elf_make_empty_symbol (abfd)
3902 bfd *abfd;
3903{
3904 elf_symbol_type *newsym;
3905
3906 newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type));
3907 if (!newsym)
a9713b91 3908 return NULL;
ede4eed4
KR		 3909 else
3910 {
3911 newsym->symbol.the_bfd = abfd;
3912 return &newsym->symbol;
3913 }
3914}
3915
3916void
3917_bfd_elf_get_symbol_info (ignore_abfd, symbol, ret)
3918 bfd *ignore_abfd;
3919 asymbol *symbol;
3920 symbol_info *ret;
3921{
3922 bfd_symbol_info (symbol, ret);
3923}
3924
d6bfcdb5
ILT		 3925/* Return whether a symbol name implies a local symbol. Most targets
3926 use this function for the is_local_label_name entry point, but some
3927 override it. */
a66a61a0
ILT		 3928
3929boolean
3930_bfd_elf_is_local_label_name (abfd, name)
3931 bfd *abfd;
3932 const char *name;
3933{
d6bfcdb5
ILT		 3934 /* Normal local symbols start with ``.L''. */
3935 if (name[0] == '.' && name[1] == 'L')
3936 return true;
3937
3938 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
3939 DWARF debugging symbols starting with ``..''. */
3940 if (name[0] == '.' && name[1] == '.')
3941 return true;
3942
3943 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
3944 emitting DWARF debugging output. I suspect this is actually a
3945 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
3946 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
3947 underscore to be emitted on some ELF targets). For ease of use,
3948 we treat such symbols as local. */
3949 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
3950 return true;
3951
3952 return false;
a66a61a0
ILT		 3953}
3954
ede4eed4
KR		 3955alent *
3956_bfd_elf_get_lineno (ignore_abfd, symbol)
3957 bfd *ignore_abfd;
3958 asymbol *symbol;
3959{
8cd2f4fe 3960 abort ();
ede4eed4
KR		 3961 return NULL;
3962}
3963
3964boolean
3965_bfd_elf_set_arch_mach (abfd, arch, machine)
3966 bfd *abfd;
3967 enum bfd_architecture arch;
3968 unsigned long machine;
3969{
3970 /* If this isn't the right architecture for this backend, and this
3971 isn't the generic backend, fail. */
3972 if (arch != get_elf_backend_data (abfd)->arch
3973 && arch != bfd_arch_unknown
3974 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
3975 return false;
3976
3977 return bfd_default_set_arch_mach (abfd, arch, machine);
3978}
3979
6f904fce
ILT		 3980/* Find the nearest line to a particular section and offset, for error
3981 reporting. */
3982
ede4eed4
KR		 3983boolean
3984_bfd_elf_find_nearest_line (abfd,
6f904fce
ILT		 3985 section,
3986 symbols,
3987 offset,
3988 filename_ptr,
3989 functionname_ptr,
3990 line_ptr)
ede4eed4
KR		 3991 bfd *abfd;
3992 asection *section;
3993 asymbol **symbols;
3994 bfd_vma offset;
3995 CONST char **filename_ptr;
3996 CONST char **functionname_ptr;
3997 unsigned int *line_ptr;
3998{
86aac8ea 3999 boolean found;
6f904fce
ILT		 4000 const char *filename;
4001 asymbol *func;
86aac8ea 4002 bfd_vma low_func;
6f904fce
ILT		 4003 asymbol **p;
4004
86aac8ea
ILT		 4005 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
4006 &found, filename_ptr,
4007 functionname_ptr, line_ptr,
4008 &elf_tdata (abfd)->line_info))
4009 return false;
4010 if (found)
4011 return true;
4012
6f904fce
ILT		 4013 if (symbols == NULL)
4014 return false;
4015
4016 filename = NULL;
4017 func = NULL;
86aac8ea 4018 low_func = 0;
6f904fce
ILT		 4019
4020 for (p = symbols; *p != NULL; p++)
4021 {
4022 elf_symbol_type *q;
4023
4024 q = (elf_symbol_type *) *p;
4025
4026 if (bfd_get_section (&q->symbol) != section)
4027 continue;
4028
4029 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
4030 {
4031 default:
4032 break;
4033 case STT_FILE:
4034 filename = bfd_asymbol_name (&q->symbol);
4035 break;
4036 case STT_FUNC:
86aac8ea
ILT		 4037 if (q->symbol.section == section
4038 && q->symbol.value >= low_func
4039 && q->symbol.value <= offset)
4040 {
4041 func = (asymbol *) q;
4042 low_func = q->symbol.value;
4043 }
6f904fce
ILT		 4044 break;
4045 }
4046 }
4047
4048 if (func == NULL)
4049 return false;
4050
4051 *filename_ptr = filename;
4052 *functionname_ptr = bfd_asymbol_name (func);
4053 *line_ptr = 0;
4054 return true;
ede4eed4
KR		 4055}
4056
4057int
4058_bfd_elf_sizeof_headers (abfd, reloc)
4059 bfd *abfd;
4060 boolean reloc;
4061{
4062 int ret;
4063
4064 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
4065 if (! reloc)
fd0198f0 4066 ret += get_program_header_size (abfd);
ede4eed4
KR		 4067 return ret;
4068}
4069
4070boolean
4071_bfd_elf_set_section_contents (abfd, section, location, offset, count)
4072 bfd *abfd;
4073 sec_ptr section;
4074 PTR location;
4075 file_ptr offset;
4076 bfd_size_type count;
4077{
4078 Elf_Internal_Shdr *hdr;
4079
4080 if (! abfd->output_has_begun
4081 && ! _bfd_elf_compute_section_file_positions (abfd,
4082 (struct bfd_link_info *) NULL))
4083 return false;
4084
4085 hdr = &elf_section_data (section)->this_hdr;
4086
4087 if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1)
4088 return false;
4089 if (bfd_write (location, 1, count, abfd) != count)
4090 return false;
4091
4092 return true;
4093}
4094
4095void
4096_bfd_elf_no_info_to_howto (abfd, cache_ptr, dst)
4097 bfd *abfd;
4098 arelent *cache_ptr;
4099 Elf_Internal_Rela *dst;
4100{
8cd2f4fe 4101 abort ();
ede4eed4
KR		 4102}
4103
4104#if 0
4105void
4106_bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
4107 bfd *abfd;
4108 arelent *cache_ptr;
4109 Elf_Internal_Rel *dst;
4110{
8cd2f4fe 4111 abort ();
ede4eed4
KR		 4112}
4113#endif
7fc6a16a
ILT		 4114
4115/* Try to convert a non-ELF reloc into an ELF one. */
4116
4117boolean
4118_bfd_elf_validate_reloc (abfd, areloc)
4119 bfd *abfd;
4120 arelent *areloc;
4121{
4122 /* Check whether we really have an ELF howto. */
4123
4124 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
4125 {
4126 bfd_reloc_code_real_type code;
4127 reloc_howto_type *howto;
4128
4129 /* Alien reloc: Try to determine its type to replace it with an
4130 equivalent ELF reloc. */
4131
4132 if (areloc->howto->pc_relative)
4133 {
4134 switch (areloc->howto->bitsize)
4135 {
4136 case 8:
4137 code = BFD_RELOC_8_PCREL;
4138 break;
4139 case 12:
4140 code = BFD_RELOC_12_PCREL;
4141 break;
4142 case 16:
4143 code = BFD_RELOC_16_PCREL;
4144 break;
4145 case 24:
4146 code = BFD_RELOC_24_PCREL;
4147 break;
4148 case 32:
4149 code = BFD_RELOC_32_PCREL;
4150 break;
4151 case 64:
4152 code = BFD_RELOC_64_PCREL;
4153 break;
4154 default:
4155 goto fail;
4156 }
4157
4158 howto = bfd_reloc_type_lookup (abfd, code);
4159
4160 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
4161 {
4162 if (howto->pcrel_offset)
4163 areloc->addend += areloc->address;
4164 else
4165 areloc->addend -= areloc->address; /* addend is unsigned!! */
4166 }
4167 }
4168 else
4169 {
4170 switch (areloc->howto->bitsize)
4171 {
4172 case 8:
4173 code = BFD_RELOC_8;
4174 break;
4175 case 14:
4176 code = BFD_RELOC_14;
4177 break;
4178 case 16:
4179 code = BFD_RELOC_16;
4180 break;
4181 case 26:
4182 code = BFD_RELOC_26;
4183 break;
4184 case 32:
4185 code = BFD_RELOC_32;
4186 break;
4187 case 64:
4188 code = BFD_RELOC_64;
4189 break;
4190 default:
4191 goto fail;
4192 }
4193
4194 howto = bfd_reloc_type_lookup (abfd, code);
4195 }
4196
4197 if (howto)
4198 areloc->howto = howto;
4199 else
4200 goto fail;
4201 }
4202
4203 return true;
4204
4205 fail:
4206 (*_bfd_error_handler)
4207 ("%s: unsupported relocation type %s",
4208 bfd_get_filename (abfd), areloc->howto->name);
4209 bfd_set_error (bfd_error_bad_value);
4210 return false;
4211}
GDB Binutils - Deliverables
This page took 0.392693 seconds and 4 git commands to generate.