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From Eric Youngdale <[email protected]>:
[binutils.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
b176e1e9 308 return ((char *) hdr->contents) + strindex;
32090b8e
KR		 309}
310
497c5434 311/* Make a BFD section from an ELF section. We store a pointer to the
b176e1e9 312 BFD section in the bfd_section field of the header. */
497c5434
ILT		 313
314boolean
315_bfd_elf_make_section_from_shdr (abfd, hdr, name)
316 bfd *abfd;
317 Elf_Internal_Shdr *hdr;
318 const char *name;
319{
320 asection *newsect;
321 flagword flags;
322
b176e1e9 323 if (hdr->bfd_section != NULL)
497c5434 324 {
b176e1e9
ILT		 325 BFD_ASSERT (strcmp (name,
326 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
497c5434
ILT		 327 return true;
328 }
329
330 newsect = bfd_make_section_anyway (abfd, name);
331 if (newsect == NULL)
332 return false;
333
334 newsect->filepos = hdr->sh_offset;
335
336 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
337 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
338 || ! bfd_set_section_alignment (abfd, newsect,
339 bfd_log2 (hdr->sh_addralign)))
340 return false;
341
342 flags = SEC_NO_FLAGS;
343 if (hdr->sh_type != SHT_NOBITS)
344 flags |= SEC_HAS_CONTENTS;
345 if ((hdr->sh_flags & SHF_ALLOC) != 0)
346 {
347 flags |= SEC_ALLOC;
348 if (hdr->sh_type != SHT_NOBITS)
349 flags |= SEC_LOAD;
350 }
351 if ((hdr->sh_flags & SHF_WRITE) == 0)
352 flags |= SEC_READONLY;
353 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
354 flags |= SEC_CODE;
7c6da9ca 355 else if ((flags & SEC_LOAD) != 0)
497c5434
ILT		 356 flags |= SEC_DATA;
357
358 /* The debugging sections appear to be recognized only by name, not
359 any sort of flag. */
360 if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0
361 || strncmp (name, ".line", sizeof ".line" - 1) == 0
362 || strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
363 flags |= SEC_DEBUGGING;
364
f0c12b73
DE		 365 /* As a GNU extension, if the name begins with .gnu.linkonce, we
366 only link a single copy of the section. This is used to support
367 g++. g++ will emit each template expansion in its own section.
368 The symbols will be defined as weak, so that multiple definitions
369 are permitted. The GNU linker extension is to actually discard
370 all but one of the sections. */
371 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
372 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
373
497c5434
ILT		 374 if (! bfd_set_section_flags (abfd, newsect, flags))
375 return false;
376
fd0198f0
ILT		 377 if ((flags & SEC_ALLOC) != 0)
378 {
379 Elf_Internal_Phdr *phdr;
380 unsigned int i;
381
382 /* Look through the phdrs to see if we need to adjust the lma. */
383 phdr = elf_tdata (abfd)->phdr;
384 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
385 {
386 if (phdr->p_type == PT_LOAD
6933148a 387 && phdr->p_paddr != 0
fd0198f0
ILT		 388 && phdr->p_vaddr != phdr->p_paddr
389 && phdr->p_vaddr <= hdr->sh_addr
b944e7e8
ILT		 390 && phdr->p_vaddr + phdr->p_memsz >= hdr->sh_addr + hdr->sh_size
391 && ((flags & SEC_LOAD) == 0
392 || (phdr->p_offset <= hdr->sh_offset
393 && (phdr->p_offset + phdr->p_filesz
394 >= hdr->sh_offset + hdr->sh_size))))
fd0198f0
ILT		 395 {
396 newsect->lma += phdr->p_paddr - phdr->p_vaddr;
397 break;
398 }
399 }
400 }
401
b176e1e9 402 hdr->bfd_section = newsect;
497c5434
ILT		 403 elf_section_data (newsect)->this_hdr = *hdr;
404
405 return true;
406}
407
32090b8e
KR		 408/*
409INTERNAL_FUNCTION
410 bfd_elf_find_section
411
412SYNOPSIS
413 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
414
415DESCRIPTION
416 Helper functions for GDB to locate the string tables.
417 Since BFD hides string tables from callers, GDB needs to use an
418 internal hook to find them. Sun's .stabstr, in particular,
419 isn't even pointed to by the .stab section, so ordinary
420 mechanisms wouldn't work to find it, even if we had some.
421*/
422
423struct elf_internal_shdr *
013dec1a
ILT		 424bfd_elf_find_section (abfd, name)
425 bfd * abfd;
426 char *name;
32090b8e
KR		 427{
428 Elf_Internal_Shdr **i_shdrp;
429 char *shstrtab;
430 unsigned int max;
431 unsigned int i;
432
433 i_shdrp = elf_elfsections (abfd);
434 if (i_shdrp != NULL)
435 {
ede4eed4 436 shstrtab = bfd_elf_get_str_section (abfd, elf_elfheader (abfd)->e_shstrndx);
32090b8e
KR		 437 if (shstrtab != NULL)
438 {
439 max = elf_elfheader (abfd)->e_shnum;
440 for (i = 1; i < max; i++)
441 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
442 return i_shdrp[i];
443 }
444 }
445 return 0;
446}
447
32090b8e
KR		 448const char *const bfd_elf_section_type_names[] = {
449 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
450 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
451 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
452};
453
454/* ELF relocs are against symbols. If we are producing relocateable
455 output, and the reloc is against an external symbol, and nothing
456 has given us any additional addend, the resulting reloc will also
457 be against the same symbol. In such a case, we don't want to
458 change anything about the way the reloc is handled, since it will
459 all be done at final link time. Rather than put special case code
460 into bfd_perform_relocation, all the reloc types use this howto
461 function. It just short circuits the reloc if producing
462 relocateable output against an external symbol. */
463
013dec1a 464/*ARGSUSED*/
32090b8e
KR		 465bfd_reloc_status_type
466bfd_elf_generic_reloc (abfd,
467 reloc_entry,
468 symbol,
469 data,
470 input_section,
4c3721d5
ILT		 471 output_bfd,
472 error_message)
32090b8e
KR		 473 bfd *abfd;
474 arelent *reloc_entry;
475 asymbol *symbol;
476 PTR data;
477 asection *input_section;
478 bfd *output_bfd;
4c3721d5 479 char **error_message;
32090b8e
KR		 480{
481 if (output_bfd != (bfd *) NULL
482 && (symbol->flags & BSF_SECTION_SYM) == 0
d1b44e83
ILT		 483 && (! reloc_entry->howto->partial_inplace
484 || reloc_entry->addend == 0))
32090b8e
KR		 485 {
486 reloc_entry->address += input_section->output_offset;
487 return bfd_reloc_ok;
488 }
489
490 return bfd_reloc_continue;
491}
013dec1a 492\f
27fb8f29
ILT		 493/* Print out the program headers. */
494
495boolean
496_bfd_elf_print_private_bfd_data (abfd, farg)
497 bfd *abfd;
498 PTR farg;
499{
500 FILE *f = (FILE *) farg;
501 Elf_Internal_Phdr *p;
02fcd126
ILT		 502 asection *s;
503 bfd_byte *dynbuf = NULL;
27fb8f29
ILT		 504
505 p = elf_tdata (abfd)->phdr;
02fcd126 506 if (p != NULL)
27fb8f29 507 {
02fcd126 508 unsigned int i, c;
27fb8f29 509
02fcd126
ILT		 510 fprintf (f, "\nProgram Header:\n");
511 c = elf_elfheader (abfd)->e_phnum;
512 for (i = 0; i < c; i++, p++)
27fb8f29 513 {
02fcd126
ILT		 514 const char *s;
515 char buf[20];
516
517 switch (p->p_type)
518 {
519 case PT_NULL: s = "NULL"; break;
520 case PT_LOAD: s = "LOAD"; break;
521 case PT_DYNAMIC: s = "DYNAMIC"; break;
522 case PT_INTERP: s = "INTERP"; break;
523 case PT_NOTE: s = "NOTE"; break;
524 case PT_SHLIB: s = "SHLIB"; break;
525 case PT_PHDR: s = "PHDR"; break;
526 default: sprintf (buf, "0x%lx", p->p_type); s = buf; break;
527 }
528 fprintf (f, "%8s off 0x", s);
529 fprintf_vma (f, p->p_offset);
530 fprintf (f, " vaddr 0x");
531 fprintf_vma (f, p->p_vaddr);
532 fprintf (f, " paddr 0x");
533 fprintf_vma (f, p->p_paddr);
534 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
535 fprintf (f, " filesz 0x");
536 fprintf_vma (f, p->p_filesz);
537 fprintf (f, " memsz 0x");
538 fprintf_vma (f, p->p_memsz);
539 fprintf (f, " flags %c%c%c",
540 (p->p_flags & PF_R) != 0 ? 'r' : '-',
541 (p->p_flags & PF_W) != 0 ? 'w' : '-',
542 (p->p_flags & PF_X) != 0 ? 'x' : '-');
543 if ((p->p_flags &~ (PF_R | PF_W | PF_X)) != 0)
544 fprintf (f, " %lx", p->p_flags &~ (PF_R | PF_W | PF_X));
545 fprintf (f, "\n");
546 }
547 }
548
549 s = bfd_get_section_by_name (abfd, ".dynamic");
550 if (s != NULL)
551 {
552 int elfsec;
553 unsigned long link;
554 bfd_byte *extdyn, *extdynend;
555 size_t extdynsize;
556 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
557
558 fprintf (f, "\nDynamic Section:\n");
559
560 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
561 if (dynbuf == NULL)
562 goto error_return;
563 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
564 s->_raw_size))
565 goto error_return;
566
567 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
568 if (elfsec == -1)
569 goto error_return;
570 link = elf_elfsections (abfd)[elfsec]->sh_link;
571
572 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
573 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
574
575 extdyn = dynbuf;
576 extdynend = extdyn + s->_raw_size;
577 for (; extdyn < extdynend; extdyn += extdynsize)
578 {
579 Elf_Internal_Dyn dyn;
580 const char *name;
581 char ab[20];
582 boolean stringp;
583
584 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
585
586 if (dyn.d_tag == DT_NULL)
587 break;
588
589 stringp = false;
590 switch (dyn.d_tag)
591 {
592 default:
927d05b5 593 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
02fcd126
ILT		 594 name = ab;
595 break;
596
597 case DT_NEEDED: name = "NEEDED"; stringp = true; break;
598 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
599 case DT_PLTGOT: name = "PLTGOT"; break;
600 case DT_HASH: name = "HASH"; break;
601 case DT_STRTAB: name = "STRTAB"; break;
602 case DT_SYMTAB: name = "SYMTAB"; break;
603 case DT_RELA: name = "RELA"; break;
604 case DT_RELASZ: name = "RELASZ"; break;
605 case DT_RELAENT: name = "RELAENT"; break;
606 case DT_STRSZ: name = "STRSZ"; break;
607 case DT_SYMENT: name = "SYMENT"; break;
608 case DT_INIT: name = "INIT"; break;
609 case DT_FINI: name = "FINI"; break;
610 case DT_SONAME: name = "SONAME"; stringp = true; break;
611 case DT_RPATH: name = "RPATH"; stringp = true; break;
612 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
613 case DT_REL: name = "REL"; break;
614 case DT_RELSZ: name = "RELSZ"; break;
615 case DT_RELENT: name = "RELENT"; break;
616 case DT_PLTREL: name = "PLTREL"; break;
617 case DT_DEBUG: name = "DEBUG"; break;
618 case DT_TEXTREL: name = "TEXTREL"; break;
619 case DT_JMPREL: name = "JMPREL"; break;
148437ec
ILT		 620 case DT_AUXILIARY: name = "AUXILIARY"; stringp = true; break;
621 case DT_FILTER: name = "FILTER"; stringp = true; break;
a66a61a0
ILT		 622 case DT_VERSYM: name = "VERSYM"; break;
623 case DT_VERDEF: name = "VERDEF"; break;
624 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
625 case DT_VERNEED: name = "VERNEED"; break;
626 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
02fcd126
ILT		 627 }
628
629 fprintf (f, " %-11s ", name);
630 if (! stringp)
927d05b5 631 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
02fcd126
ILT		 632 else
633 {
634 const char *string;
635
636 string = bfd_elf_string_from_elf_section (abfd, link,
637 dyn.d_un.d_val);
638 if (string == NULL)
639 goto error_return;
640 fprintf (f, "%s", string);
641 }
642 fprintf (f, "\n");
27fb8f29 643 }
02fcd126
ILT		 644
645 free (dynbuf);
646 dynbuf = NULL;
27fb8f29
ILT		 647 }
648
a66a61a0
ILT		 649 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
650 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
651 {
652 if (! _bfd_elf_slurp_version_tables (abfd))
653 return false;
654 }
655
656 if (elf_dynverdef (abfd) != 0)
657 {
658 Elf_Internal_Verdef *t;
659
660 fprintf (f, "\nVersion definitions:\n");
661 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
662 {
663 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
664 t->vd_flags, t->vd_hash, t->vd_nodename);
665 if (t->vd_auxptr->vda_nextptr != NULL)
666 {
667 Elf_Internal_Verdaux *a;
668
669 fprintf (f, "\t");
670 for (a = t->vd_auxptr->vda_nextptr;
671 a != NULL;
672 a = a->vda_nextptr)
673 fprintf (f, "%s ", a->vda_nodename);
674 fprintf (f, "\n");
675 }
676 }
677 }
678
679 if (elf_dynverref (abfd) != 0)
680 {
681 Elf_Internal_Verneed *t;
682
683 fprintf (f, "\nVersion References:\n");
684 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
685 {
686 Elf_Internal_Vernaux *a;
687
688 fprintf (f, " required from %s:\n", t->vn_filename);
689 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
690 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
691 a->vna_flags, a->vna_other, a->vna_nodename);
692 }
693 }
694
27fb8f29 695 return true;
02fcd126
ILT		 696
697 error_return:
698 if (dynbuf != NULL)
699 free (dynbuf);
700 return false;
27fb8f29
ILT		 701}
702
b176e1e9 703/* Display ELF-specific fields of a symbol. */
d6bfcdb5 704
b176e1e9 705void
d6bfcdb5
ILT		 706bfd_elf_print_symbol (abfd, filep, symbol, how)
707 bfd *abfd;
b176e1e9
ILT		 708 PTR filep;
709 asymbol *symbol;
710 bfd_print_symbol_type how;
711{
712 FILE *file = (FILE *) filep;
713 switch (how)
714 {
715 case bfd_print_symbol_name:
716 fprintf (file, "%s", symbol->name);
717 break;
718 case bfd_print_symbol_more:
719 fprintf (file, "elf ");
720 fprintf_vma (file, symbol->value);
721 fprintf (file, " %lx", (long) symbol->flags);
722 break;
723 case bfd_print_symbol_all:
724 {
725 CONST char *section_name;
726 section_name = symbol->section ? symbol->section->name : "(*none*)";
727 bfd_print_symbol_vandf ((PTR) file, symbol);
728 fprintf (file, " %s\t", section_name);
729 /* Print the "other" value for a symbol. For common symbols,
730 we've already printed the size; now print the alignment.
731 For other symbols, we have no specified alignment, and
732 we've printed the address; now print the size. */
733 fprintf_vma (file,
734 (bfd_is_com_section (symbol->section)
735 ? ((elf_symbol_type *) symbol)->internal_elf_sym.st_value
736 : ((elf_symbol_type *) symbol)->internal_elf_sym.st_size));
d6bfcdb5
ILT		 737
738 /* If we have version information, print it. */
739 if (elf_tdata (abfd)->dynversym_section != 0
740 && (elf_tdata (abfd)->dynverdef_section != 0
741 || elf_tdata (abfd)->dynverref_section != 0))
742 {
743 unsigned int vernum;
744 const char *version_string;
745
746 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
747
748 if (vernum == 0)
749 version_string = "";
750 else if (vernum == 1)
751 version_string = "Base";
752 else if (vernum < elf_tdata (abfd)->cverdefs)
753 version_string =
754 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
755 else
756 {
757 Elf_Internal_Verneed *t;
758
759 version_string = "";
760 for (t = elf_tdata (abfd)->verref;
761 t != NULL;
762 t = t->vn_nextref)
763 {
764 Elf_Internal_Vernaux *a;
765
766 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
767 {
768 if (a->vna_other == vernum)
769 {
770 version_string = a->vna_nodename;
771 break;
772 }
773 }
774 }
775 }
776
777 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
778 fprintf (file, " %-12s", version_string);
779 else
780 {
781 int i;
782
783 fprintf (file, " (%s)", version_string);
784 for (i = strlen (version_string) - 10; i > 0; --i)
785 putc (' ', file);
786 }
787 }
788
69e2ff18
ILT		 789 /* If the st_other field is not zero, print it. */
790 if (((elf_symbol_type *) symbol)->internal_elf_sym.st_other != 0)
791 fprintf (file, " 0x%02x",
792 ((unsigned int)
793 ((elf_symbol_type *) symbol)->internal_elf_sym.st_other));
d6bfcdb5 794
b176e1e9
ILT		 795 fprintf (file, " %s", symbol->name);
796 }
797 break;
798 }
799}
800\f
013dec1a
ILT		 801/* Create an entry in an ELF linker hash table. */
802
5315c428
ILT		 803struct bfd_hash_entry *
804_bfd_elf_link_hash_newfunc (entry, table, string)
013dec1a
ILT		 805 struct bfd_hash_entry *entry;
806 struct bfd_hash_table *table;
807 const char *string;
808{
809 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
810
811 /* Allocate the structure if it has not already been allocated by a
812 subclass. */
813 if (ret == (struct elf_link_hash_entry *) NULL)
814 ret = ((struct elf_link_hash_entry *)
815 bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)));
816 if (ret == (struct elf_link_hash_entry *) NULL)
a9713b91 817 return (struct bfd_hash_entry *) ret;
013dec1a
ILT		 818
819 /* Call the allocation method of the superclass. */
820 ret = ((struct elf_link_hash_entry *)
821 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
822 table, string));
823 if (ret != (struct elf_link_hash_entry *) NULL)
824 {
825 /* Set local fields. */
826 ret->indx = -1;
827 ret->size = 0;
013dec1a
ILT		 828 ret->dynindx = -1;
829 ret->dynstr_index = 0;
830 ret->weakdef = NULL;
b176e1e9
ILT		 831 ret->got_offset = (bfd_vma) -1;
832 ret->plt_offset = (bfd_vma) -1;
86aac8ea 833 ret->linker_section_pointer = (elf_linker_section_pointers_t *)0;
a66a61a0 834 ret->verinfo.verdef = NULL;
013dec1a 835 ret->type = STT_NOTYPE;
80be821d 836 ret->other = 0;
869b7d80
ILT		 837 /* Assume that we have been called by a non-ELF symbol reader.
838 This flag is then reset by the code which reads an ELF input
839 file. This ensures that a symbol created by a non-ELF symbol
840 reader will have the flag set correctly. */
841 ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
013dec1a
ILT		 842 }
843
844 return (struct bfd_hash_entry *) ret;
845}
846
5315c428
ILT		 847/* Initialize an ELF linker hash table. */
848
849boolean
850_bfd_elf_link_hash_table_init (table, abfd, newfunc)
851 struct elf_link_hash_table *table;
852 bfd *abfd;
853 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
854 struct bfd_hash_table *,
855 const char *));
856{
b176e1e9 857 table->dynamic_sections_created = false;
5315c428 858 table->dynobj = NULL;
b176e1e9
ILT		 859 /* The first dynamic symbol is a dummy. */
860 table->dynsymcount = 1;
5315c428
ILT		 861 table->dynstr = NULL;
862 table->bucketcount = 0;
b176e1e9 863 table->needed = NULL;
19bfbcbe 864 table->hgot = NULL;
d1bf45aa 865 table->stab_info = NULL;
5315c428
ILT		 866 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
867}
868
013dec1a
ILT		 869/* Create an ELF linker hash table. */
870
871struct bfd_link_hash_table *
872_bfd_elf_link_hash_table_create (abfd)
873 bfd *abfd;
874{
875 struct elf_link_hash_table *ret;
876
877 ret = ((struct elf_link_hash_table *)
878 bfd_alloc (abfd, sizeof (struct elf_link_hash_table)));
879 if (ret == (struct elf_link_hash_table *) NULL)
a9713b91 880 return NULL;
5315c428
ILT		 881
882 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
013dec1a
ILT		 883 {
884 bfd_release (abfd, ret);
885 return NULL;
886 }
887
013dec1a
ILT		 888 return &ret->root;
889}
7c6da9ca
ILT		 890
891/* This is a hook for the ELF emulation code in the generic linker to
892 tell the backend linker what file name to use for the DT_NEEDED
b176e1e9
ILT		 893 entry for a dynamic object. The generic linker passes name as an
894 empty string to indicate that no DT_NEEDED entry should be made. */
7c6da9ca
ILT		 895
896void
897bfd_elf_set_dt_needed_name (abfd, name)
898 bfd *abfd;
899 const char *name;
900{
053ae1d7
ILT		 901 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
902 && bfd_get_format (abfd) == bfd_object)
903 elf_dt_name (abfd) = name;
7c6da9ca 904}
b176e1e9 905
053ae1d7
ILT		 906/* Get the list of DT_NEEDED entries for a link. This is a hook for
907 the ELF emulation code. */
b176e1e9 908
5fe14a9f 909struct bfd_link_needed_list *
b176e1e9
ILT		 910bfd_elf_get_needed_list (abfd, info)
911 bfd *abfd;
912 struct bfd_link_info *info;
913{
b2193cc5
ILT		 914 if (info->hash->creator->flavour != bfd_target_elf_flavour)
915 return NULL;
b176e1e9
ILT		 916 return elf_hash_table (info)->needed;
917}
053ae1d7
ILT		 918
919/* Get the name actually used for a dynamic object for a link. This
920 is the SONAME entry if there is one. Otherwise, it is the string
921 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
922
923const char *
924bfd_elf_get_dt_soname (abfd)
925 bfd *abfd;
926{
927 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
928 && bfd_get_format (abfd) == bfd_object)
929 return elf_dt_name (abfd);
930 return NULL;
931}
ede4eed4
KR		 932\f
933/* Allocate an ELF string table--force the first byte to be zero. */
934
935struct bfd_strtab_hash *
936_bfd_elf_stringtab_init ()
937{
938 struct bfd_strtab_hash *ret;
939
940 ret = _bfd_stringtab_init ();
941 if (ret != NULL)
942 {
943 bfd_size_type loc;
944
945 loc = _bfd_stringtab_add (ret, "", true, false);
946 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
947 if (loc == (bfd_size_type) -1)
948 {
949 _bfd_stringtab_free (ret);
950 ret = NULL;
951 }
952 }
953 return ret;
954}
955\f
956/* ELF .o/exec file reading */
957
958/* Create a new bfd section from an ELF section header. */
959
960boolean
961bfd_section_from_shdr (abfd, shindex)
962 bfd *abfd;
963 unsigned int shindex;
964{
965 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
966 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
967 struct elf_backend_data *bed = get_elf_backend_data (abfd);
968 char *name;
969
970 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
971
972 switch (hdr->sh_type)
973 {
974 case SHT_NULL:
975 /* Inactive section. Throw it away. */
976 return true;
977
978 case SHT_PROGBITS: /* Normal section with contents. */
979 case SHT_DYNAMIC: /* Dynamic linking information. */
980 case SHT_NOBITS: /* .bss section. */
981 case SHT_HASH: /* .hash section. */
5b3b9ff6 982 case SHT_NOTE: /* .note section. */
ede4eed4
KR		 983 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
984
985 case SHT_SYMTAB: /* A symbol table */
986 if (elf_onesymtab (abfd) == shindex)
987 return true;
988
989 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
990 BFD_ASSERT (elf_onesymtab (abfd) == 0);
991 elf_onesymtab (abfd) = shindex;
992 elf_tdata (abfd)->symtab_hdr = *hdr;
fd0198f0 993 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
ede4eed4
KR		 994 abfd->flags |= HAS_SYMS;
995
996 /* Sometimes a shared object will map in the symbol table. If
997 SHF_ALLOC is set, and this is a shared object, then we also
998 treat this section as a BFD section. We can not base the
999 decision purely on SHF_ALLOC, because that flag is sometimes
1000 set in a relocateable object file, which would confuse the
1001 linker. */
1002 if ((hdr->sh_flags & SHF_ALLOC) != 0
1003 && (abfd->flags & DYNAMIC) != 0
1004 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1005 return false;
1006
1007 return true;
1008
1009 case SHT_DYNSYM: /* A dynamic symbol table */
1010 if (elf_dynsymtab (abfd) == shindex)
1011 return true;
1012
1013 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1014 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1015 elf_dynsymtab (abfd) = shindex;
1016 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
fd0198f0 1017 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
ede4eed4
KR		 1018 abfd->flags |= HAS_SYMS;
1019
1020 /* Besides being a symbol table, we also treat this as a regular
1021 section, so that objcopy can handle it. */
1022 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1023
1024 case SHT_STRTAB: /* A string table */
1025 if (hdr->bfd_section != NULL)
1026 return true;
1027 if (ehdr->e_shstrndx == shindex)
1028 {
1029 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1030 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1031 return true;
1032 }
1033 {
1034 unsigned int i;
1035
1036 for (i = 1; i < ehdr->e_shnum; i++)
1037 {
1038 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1039 if (hdr2->sh_link == shindex)
1040 {
1041 if (! bfd_section_from_shdr (abfd, i))
1042 return false;
1043 if (elf_onesymtab (abfd) == i)
1044 {
1045 elf_tdata (abfd)->strtab_hdr = *hdr;
1046 elf_elfsections (abfd)[shindex] =
1047 &elf_tdata (abfd)->strtab_hdr;
1048 return true;
1049 }
1050 if (elf_dynsymtab (abfd) == i)
1051 {
1052 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
fd0198f0 1053 elf_elfsections (abfd)[shindex] = hdr =
ede4eed4
KR		 1054 &elf_tdata (abfd)->dynstrtab_hdr;
1055 /* We also treat this as a regular section, so
1056 that objcopy can handle it. */
1057 break;
1058 }
1059#if 0 /* Not handling other string tables specially right now. */
1060 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
1061 /* We have a strtab for some random other section. */
1062 newsect = (asection *) hdr2->bfd_section;
1063 if (!newsect)
1064 break;
1065 hdr->bfd_section = newsect;
1066 hdr2 = &elf_section_data (newsect)->str_hdr;
1067 *hdr2 = *hdr;
1068 elf_elfsections (abfd)[shindex] = hdr2;
1069#endif
1070 }
1071 }
1072 }
1073
1074 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1075
1076 case SHT_REL:
1077 case SHT_RELA:
1078 /* *These* do a lot of work -- but build no sections! */
1079 {
1080 asection *target_sect;
1081 Elf_Internal_Shdr *hdr2;
ede4eed4 1082
ae115e51
ILT		 1083 /* For some incomprehensible reason Oracle distributes
1084 libraries for Solaris in which some of the objects have
1085 bogus sh_link fields. It would be nice if we could just
1086 reject them, but, unfortunately, some people need to use
1087 them. We scan through the section headers; if we find only
1088 one suitable symbol table, we clobber the sh_link to point
1089 to it. I hope this doesn't break anything. */
1090 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1091 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1092 {
1093 int scan;
1094 int found;
1095
1096 found = 0;
1097 for (scan = 1; scan < ehdr->e_shnum; scan++)
1098 {
1099 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1100 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1101 {
1102 if (found != 0)
1103 {
1104 found = 0;
1105 break;
1106 }
1107 found = scan;
1108 }
1109 }
1110 if (found != 0)
1111 hdr->sh_link = found;
1112 }
1113
ede4eed4 1114 /* Get the symbol table. */
ae115e51
ILT		 1115 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1116 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
ede4eed4
KR		 1117 return false;
1118
1119 /* If this reloc section does not use the main symbol table we
1120 don't treat it as a reloc section. BFD can't adequately
1121 represent such a section, so at least for now, we don't
1122 try. We just present it as a normal section. */
1123 if (hdr->sh_link != elf_onesymtab (abfd))
e85f2fbd 1124 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
ede4eed4 1125
ede4eed4
KR		 1126 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1127 return false;
1128 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1129 if (target_sect == NULL)
1130 return false;
1131
d1bf45aa
ILT		 1132 if ((target_sect->flags & SEC_RELOC) == 0
1133 || target_sect->reloc_count == 0)
1134 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1135 else
1136 {
1137 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1138 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2));
1139 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1140 }
ede4eed4
KR		 1141 *hdr2 = *hdr;
1142 elf_elfsections (abfd)[shindex] = hdr2;
d1bf45aa 1143 target_sect->reloc_count += hdr->sh_size / hdr->sh_entsize;
ede4eed4
KR		 1144 target_sect->flags |= SEC_RELOC;
1145 target_sect->relocation = NULL;
1146 target_sect->rel_filepos = hdr->sh_offset;
1147 abfd->flags |= HAS_RELOC;
1148 return true;
1149 }
1150 break;
1151
a66a61a0
ILT		 1152 case SHT_GNU_verdef:
1153 elf_dynverdef (abfd) = shindex;
1154 elf_tdata (abfd)->dynverdef_hdr = *hdr;
d6bfcdb5 1155 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
a66a61a0
ILT		 1156 break;
1157
1158 case SHT_GNU_versym:
1159 elf_dynversym (abfd) = shindex;
1160 elf_tdata (abfd)->dynversym_hdr = *hdr;
d6bfcdb5 1161 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
a66a61a0
ILT		 1162 break;
1163
1164 case SHT_GNU_verneed:
1165 elf_dynverref (abfd) = shindex;
1166 elf_tdata (abfd)->dynverref_hdr = *hdr;
d6bfcdb5 1167 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
a66a61a0
ILT		 1168 break;
1169
ede4eed4 1170 case SHT_SHLIB:
ede4eed4
KR		 1171 return true;
1172
1173 default:
1174 /* Check for any processor-specific section types. */
1175 {
1176 if (bed->elf_backend_section_from_shdr)
1177 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
1178 }
1179 break;
1180 }
1181
1182 return true;
1183}
1184
1185/* Given an ELF section number, retrieve the corresponding BFD
1186 section. */
1187
1188asection *
1189bfd_section_from_elf_index (abfd, index)
1190 bfd *abfd;
1191 unsigned int index;
1192{
1193 BFD_ASSERT (index > 0 && index < SHN_LORESERVE);
1194 if (index >= elf_elfheader (abfd)->e_shnum)
1195 return NULL;
1196 return elf_elfsections (abfd)[index]->bfd_section;
1197}
1198
1199boolean
1200_bfd_elf_new_section_hook (abfd, sec)
1201 bfd *abfd;
1202 asection *sec;
1203{
1204 struct bfd_elf_section_data *sdata;
1205
1206 sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata));
1207 if (!sdata)
a9713b91 1208 return false;
ede4eed4
KR		 1209 sec->used_by_bfd = (PTR) sdata;
1210 memset (sdata, 0, sizeof (*sdata));
1211 return true;
1212}
1213
1214/* Create a new bfd section from an ELF program header.
1215
1216 Since program segments have no names, we generate a synthetic name
1217 of the form segment<NUM>, where NUM is generally the index in the
1218 program header table. For segments that are split (see below) we
1219 generate the names segment<NUM>a and segment<NUM>b.
1220
1221 Note that some program segments may have a file size that is different than
1222 (less than) the memory size. All this means is that at execution the
1223 system must allocate the amount of memory specified by the memory size,
1224 but only initialize it with the first "file size" bytes read from the
1225 file. This would occur for example, with program segments consisting
1226 of combined data+bss.
1227
1228 To handle the above situation, this routine generates TWO bfd sections
1229 for the single program segment. The first has the length specified by
1230 the file size of the segment, and the second has the length specified
1231 by the difference between the two sizes. In effect, the segment is split
1232 into it's initialized and uninitialized parts.
1233
1234 */
1235
1236boolean
1237bfd_section_from_phdr (abfd, hdr, index)
1238 bfd *abfd;
1239 Elf_Internal_Phdr *hdr;
1240 int index;
1241{
1242 asection *newsect;
1243 char *name;
1244 char namebuf[64];
1245 int split;
1246
1247 split = ((hdr->p_memsz > 0) &&
1248 (hdr->p_filesz > 0) &&
1249 (hdr->p_memsz > hdr->p_filesz));
1250 sprintf (namebuf, split ? "segment%da" : "segment%d", index);
1251 name = bfd_alloc (abfd, strlen (namebuf) + 1);
1252 if (!name)
a9713b91 1253 return false;
ede4eed4
KR		 1254 strcpy (name, namebuf);
1255 newsect = bfd_make_section (abfd, name);
1256 if (newsect == NULL)
1257 return false;
1258 newsect->vma = hdr->p_vaddr;
ae115e51 1259 newsect->lma = hdr->p_paddr;
ede4eed4
KR		 1260 newsect->_raw_size = hdr->p_filesz;
1261 newsect->filepos = hdr->p_offset;
1262 newsect->flags |= SEC_HAS_CONTENTS;
1263 if (hdr->p_type == PT_LOAD)
1264 {
1265 newsect->flags |= SEC_ALLOC;
1266 newsect->flags |= SEC_LOAD;
1267 if (hdr->p_flags & PF_X)
1268 {
1269 /* FIXME: all we known is that it has execute PERMISSION,
1270 may be data. */
1271 newsect->flags |= SEC_CODE;
1272 }
1273 }
1274 if (!(hdr->p_flags & PF_W))
1275 {
1276 newsect->flags |= SEC_READONLY;
1277 }
1278
1279 if (split)
1280 {
1281 sprintf (namebuf, "segment%db", index);
1282 name = bfd_alloc (abfd, strlen (namebuf) + 1);
1283 if (!name)
a9713b91 1284 return false;
ede4eed4
KR		 1285 strcpy (name, namebuf);
1286 newsect = bfd_make_section (abfd, name);
1287 if (newsect == NULL)
1288 return false;
1289 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
ae115e51 1290 newsect->lma = hdr->p_paddr + hdr->p_filesz;
ede4eed4
KR		 1291 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
1292 if (hdr->p_type == PT_LOAD)
1293 {
1294 newsect->flags |= SEC_ALLOC;
1295 if (hdr->p_flags & PF_X)
1296 newsect->flags |= SEC_CODE;
1297 }
1298 if (!(hdr->p_flags & PF_W))
1299 newsect->flags |= SEC_READONLY;
1300 }
1301
1302 return true;
1303}
1304
1305/* Set up an ELF internal section header for a section. */
1306
1307/*ARGSUSED*/
1308static void
1309elf_fake_sections (abfd, asect, failedptrarg)
1310 bfd *abfd;
1311 asection *asect;
1312 PTR failedptrarg;
1313{
1314 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1315 boolean *failedptr = (boolean *) failedptrarg;
1316 Elf_Internal_Shdr *this_hdr;
1317
1318 if (*failedptr)
1319 {
1320 /* We already failed; just get out of the bfd_map_over_sections
1321 loop. */
1322 return;
1323 }
1324
1325 this_hdr = &elf_section_data (asect)->this_hdr;
1326
1327 this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd),
1328 asect->name,
1329 true, false);
1330 if (this_hdr->sh_name == (unsigned long) -1)
1331 {
1332 *failedptr = true;
1333 return;
1334 }
1335
1336 this_hdr->sh_flags = 0;
ae115e51 1337
50bd50d4
MH		 1338 if ((asect->flags & SEC_ALLOC) != 0
1339 || asect->user_set_vma)
fd0198f0 1340 this_hdr->sh_addr = asect->vma;
ede4eed4
KR		 1341 else
1342 this_hdr->sh_addr = 0;
ae115e51 1343
ede4eed4
KR		 1344 this_hdr->sh_offset = 0;
1345 this_hdr->sh_size = asect->_raw_size;
1346 this_hdr->sh_link = 0;
ede4eed4 1347 this_hdr->sh_addralign = 1 << asect->alignment_power;
fd0198f0
ILT		 1348 /* The sh_entsize and sh_info fields may have been set already by
1349 copy_private_section_data. */
ede4eed4
KR		 1350
1351 this_hdr->bfd_section = asect;
1352 this_hdr->contents = NULL;
1353
1354 /* FIXME: This should not be based on section names. */
1355 if (strcmp (asect->name, ".dynstr") == 0)
1356 this_hdr->sh_type = SHT_STRTAB;
1357 else if (strcmp (asect->name, ".hash") == 0)
1358 {
1359 this_hdr->sh_type = SHT_HASH;
1360 this_hdr->sh_entsize = bed->s->arch_size / 8;
1361 }
1362 else if (strcmp (asect->name, ".dynsym") == 0)
1363 {
1364 this_hdr->sh_type = SHT_DYNSYM;
1365 this_hdr->sh_entsize = bed->s->sizeof_sym;
1366 }
1367 else if (strcmp (asect->name, ".dynamic") == 0)
1368 {
1369 this_hdr->sh_type = SHT_DYNAMIC;
1370 this_hdr->sh_entsize = bed->s->sizeof_dyn;
1371 }
1372 else if (strncmp (asect->name, ".rela", 5) == 0
1373 && get_elf_backend_data (abfd)->use_rela_p)
1374 {
1375 this_hdr->sh_type = SHT_RELA;
1376 this_hdr->sh_entsize = bed->s->sizeof_rela;
1377 }
1378 else if (strncmp (asect->name, ".rel", 4) == 0
1379 && ! get_elf_backend_data (abfd)->use_rela_p)
1380 {
1381 this_hdr->sh_type = SHT_REL;
1382 this_hdr->sh_entsize = bed->s->sizeof_rel;
1383 }
a66a61a0 1384 else if (strncmp (asect->name, ".note", 5) == 0)
ede4eed4
KR		 1385 this_hdr->sh_type = SHT_NOTE;
1386 else if (strncmp (asect->name, ".stab", 5) == 0
1387 && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0)
1388 this_hdr->sh_type = SHT_STRTAB;
a66a61a0
ILT		 1389 else if (strcmp (asect->name, ".gnu.version") == 0)
1390 {
1391 this_hdr->sh_type = SHT_GNU_versym;
1392 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
1393 }
1394 else if (strcmp (asect->name, ".gnu.version_d") == 0)
1395 {
1396 this_hdr->sh_type = SHT_GNU_verdef;
1397 this_hdr->sh_entsize = 0;
d6bfcdb5
ILT		 1398 /* objcopy or strip will copy over sh_info, but may not set
1399 cverdefs. The linker will set cverdefs, but sh_info will be
1400 zero. */
1401 if (this_hdr->sh_info == 0)
1402 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
1403 else
1404 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
1405 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
a66a61a0
ILT		 1406 }
1407 else if (strcmp (asect->name, ".gnu.version_r") == 0)
1408 {
1409 this_hdr->sh_type = SHT_GNU_verneed;
1410 this_hdr->sh_entsize = 0;
d6bfcdb5
ILT		 1411 /* objcopy or strip will copy over sh_info, but may not set
1412 cverrefs. The linker will set cverrefs, but sh_info will be
1413 zero. */
1414 if (this_hdr->sh_info == 0)
1415 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
1416 else
1417 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
1418 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
a66a61a0 1419 }
ede4eed4
KR		 1420 else if ((asect->flags & SEC_ALLOC) != 0
1421 && (asect->flags & SEC_LOAD) != 0)
1422 this_hdr->sh_type = SHT_PROGBITS;
1423 else if ((asect->flags & SEC_ALLOC) != 0
1424 && ((asect->flags & SEC_LOAD) == 0))
5fe14a9f 1425 this_hdr->sh_type = SHT_NOBITS;
ede4eed4
KR		 1426 else
1427 {
1428 /* Who knows? */
1429 this_hdr->sh_type = SHT_PROGBITS;
1430 }
1431
1432 if ((asect->flags & SEC_ALLOC) != 0)
1433 this_hdr->sh_flags |= SHF_ALLOC;
1434 if ((asect->flags & SEC_READONLY) == 0)
1435 this_hdr->sh_flags |= SHF_WRITE;
1436 if ((asect->flags & SEC_CODE) != 0)
1437 this_hdr->sh_flags |= SHF_EXECINSTR;
1438
1439 /* Check for processor-specific section types. */
1440 {
1441 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1442
1443 if (bed->elf_backend_fake_sections)
1444 (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
1445 }
1446
1447 /* If the section has relocs, set up a section header for the
1448 SHT_REL[A] section. */
1449 if ((asect->flags & SEC_RELOC) != 0)
1450 {
1451 Elf_Internal_Shdr *rela_hdr;
1452 int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
1453 char *name;
1454
1455 rela_hdr = &elf_section_data (asect)->rel_hdr;
1456 name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name));
1457 if (name == NULL)
1458 {
ede4eed4
KR		 1459 *failedptr = true;
1460 return;
1461 }
1462 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
1463 rela_hdr->sh_name =
1464 (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name,
1465 true, false);
1466 if (rela_hdr->sh_name == (unsigned int) -1)
1467 {
1468 *failedptr = true;
1469 return;
1470 }
1471 rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
1472 rela_hdr->sh_entsize = (use_rela_p
1473 ? bed->s->sizeof_rela
1474 : bed->s->sizeof_rel);
1475 rela_hdr->sh_addralign = bed->s->file_align;
1476 rela_hdr->sh_flags = 0;
1477 rela_hdr->sh_addr = 0;
1478 rela_hdr->sh_size = 0;
1479 rela_hdr->sh_offset = 0;
1480 }
1481}
1482
1483/* Assign all ELF section numbers. The dummy first section is handled here
1484 too. The link/info pointers for the standard section types are filled
1485 in here too, while we're at it. */
1486
1487static boolean
1488assign_section_numbers (abfd)
1489 bfd *abfd;
1490{
1491 struct elf_obj_tdata *t = elf_tdata (abfd);
1492 asection *sec;
1493 unsigned int section_number;
1494 Elf_Internal_Shdr **i_shdrp;
1495 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1496
1497 section_number = 1;
1498
1499 for (sec = abfd->sections; sec; sec = sec->next)
1500 {
1501 struct bfd_elf_section_data *d = elf_section_data (sec);
1502
1503 d->this_idx = section_number++;
1504 if ((sec->flags & SEC_RELOC) == 0)
1505 d->rel_idx = 0;
1506 else
1507 d->rel_idx = section_number++;
1508 }
1509
1510 t->shstrtab_section = section_number++;
1511 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
1512 t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
1513
1514 if (abfd->symcount > 0)
1515 {
1516 t->symtab_section = section_number++;
1517 t->strtab_section = section_number++;
1518 }
1519
1520 elf_elfheader (abfd)->e_shnum = section_number;
1521
1522 /* Set up the list of section header pointers, in agreement with the
1523 indices. */
1524 i_shdrp = ((Elf_Internal_Shdr **)
1525 bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)));
1526 if (i_shdrp == NULL)
a9713b91 1527 return false;
ede4eed4
KR		 1528
1529 i_shdrp[0] = ((Elf_Internal_Shdr *)
1530 bfd_alloc (abfd, sizeof (Elf_Internal_Shdr)));
1531 if (i_shdrp[0] == NULL)
1532 {
1533 bfd_release (abfd, i_shdrp);
ede4eed4
KR		 1534 return false;
1535 }
1536 memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
1537
1538 elf_elfsections (abfd) = i_shdrp;
1539
1540 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
1541 if (abfd->symcount > 0)
1542 {
1543 i_shdrp[t->symtab_section] = &t->symtab_hdr;
1544 i_shdrp[t->strtab_section] = &t->strtab_hdr;
1545 t->symtab_hdr.sh_link = t->strtab_section;
1546 }
1547 for (sec = abfd->sections; sec; sec = sec->next)
1548 {
1549 struct bfd_elf_section_data *d = elf_section_data (sec);
1550 asection *s;
1551 const char *name;
1552
1553 i_shdrp[d->this_idx] = &d->this_hdr;
1554 if (d->rel_idx != 0)
1555 i_shdrp[d->rel_idx] = &d->rel_hdr;
1556
1557 /* Fill in the sh_link and sh_info fields while we're at it. */
1558
1559 /* sh_link of a reloc section is the section index of the symbol
1560 table. sh_info is the section index of the section to which
1561 the relocation entries apply. */
1562 if (d->rel_idx != 0)
1563 {
1564 d->rel_hdr.sh_link = t->symtab_section;
1565 d->rel_hdr.sh_info = d->this_idx;
1566 }
1567
1568 switch (d->this_hdr.sh_type)
1569 {
1570 case SHT_REL:
1571 case SHT_RELA:
1572 /* A reloc section which we are treating as a normal BFD
1573 section. sh_link is the section index of the symbol
1574 table. sh_info is the section index of the section to
1575 which the relocation entries apply. We assume that an
1576 allocated reloc section uses the dynamic symbol table.
1577 FIXME: How can we be sure? */
1578 s = bfd_get_section_by_name (abfd, ".dynsym");
1579 if (s != NULL)
1580 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1581
1582 /* We look up the section the relocs apply to by name. */
1583 name = sec->name;
1584 if (d->this_hdr.sh_type == SHT_REL)
1585 name += 4;
1586 else
1587 name += 5;
1588 s = bfd_get_section_by_name (abfd, name);
1589 if (s != NULL)
1590 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
1591 break;
1592
1593 case SHT_STRTAB:
1594 /* We assume that a section named .stab*str is a stabs
1595 string section. We look for a section with the same name
1596 but without the trailing ``str'', and set its sh_link
1597 field to point to this section. */
1598 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
1599 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
1600 {
1601 size_t len;
1602 char *alc;
1603
1604 len = strlen (sec->name);
58142f10 1605 alc = (char *) bfd_malloc (len - 2);
ede4eed4 1606 if (alc == NULL)
58142f10 1607 return false;
ede4eed4
KR		 1608 strncpy (alc, sec->name, len - 3);
1609 alc[len - 3] = '\0';
1610 s = bfd_get_section_by_name (abfd, alc);
1611 free (alc);
1612 if (s != NULL)
1613 {
1614 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
1615
1616 /* This is a .stab section. */
1617 elf_section_data (s)->this_hdr.sh_entsize =
1618 4 + 2 * (bed->s->arch_size / 8);
1619 }
1620 }
1621 break;
1622
1623 case SHT_DYNAMIC:
1624 case SHT_DYNSYM:
a66a61a0
ILT		 1625 case SHT_GNU_verneed:
1626 case SHT_GNU_verdef:
ede4eed4 1627 /* sh_link is the section header index of the string table
a66a61a0
ILT		 1628 used for the dynamic entries, or the symbol table, or the
1629 version strings. */
ede4eed4
KR		 1630 s = bfd_get_section_by_name (abfd, ".dynstr");
1631 if (s != NULL)
1632 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1633 break;
1634
1635 case SHT_HASH:
a66a61a0 1636 case SHT_GNU_versym:
ede4eed4 1637 /* sh_link is the section header index of the symbol table
a66a61a0 1638 this hash table or version table is for. */
ede4eed4
KR		 1639 s = bfd_get_section_by_name (abfd, ".dynsym");
1640 if (s != NULL)
1641 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1642 break;
1643 }
1644 }
1645
1646 return true;
1647}
1648
1649/* Map symbol from it's internal number to the external number, moving
1650 all local symbols to be at the head of the list. */
1651
1652static INLINE int
1653sym_is_global (abfd, sym)
1654 bfd *abfd;
1655 asymbol *sym;
1656{
1657 /* If the backend has a special mapping, use it. */
1658 if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
1659 return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
1660 (abfd, sym));
1661
1662 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
1663 || bfd_is_und_section (bfd_get_section (sym))
1664 || bfd_is_com_section (bfd_get_section (sym)));
1665}
1666
1667static boolean
1668elf_map_symbols (abfd)
1669 bfd *abfd;
1670{
1671 int symcount = bfd_get_symcount (abfd);
1672 asymbol **syms = bfd_get_outsymbols (abfd);
1673 asymbol **sect_syms;
1674 int num_locals = 0;
1675 int num_globals = 0;
1676 int num_locals2 = 0;
1677 int num_globals2 = 0;
1678 int max_index = 0;
1679 int num_sections = 0;
1680 int idx;
1681 asection *asect;
1682 asymbol **new_syms;
1683
1684#ifdef DEBUG
1685 fprintf (stderr, "elf_map_symbols\n");
1686 fflush (stderr);
1687#endif
1688
1689 /* Add a section symbol for each BFD section. FIXME: Is this really
1690 necessary? */
1691 for (asect = abfd->sections; asect; asect = asect->next)
1692 {
1693 if (max_index < asect->index)
1694 max_index = asect->index;
1695 }
1696
1697 max_index++;
1698 sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *));
1699 if (sect_syms == NULL)
a9713b91 1700 return false;
ede4eed4
KR		 1701 elf_section_syms (abfd) = sect_syms;
1702
1703 for (idx = 0; idx < symcount; idx++)
1704 {
1705 if ((syms[idx]->flags & BSF_SECTION_SYM) != 0
fd0198f0 1706 && (syms[idx]->value + syms[idx]->section->vma) == 0)
ede4eed4
KR		 1707 {
1708 asection *sec;
1709
1710 sec = syms[idx]->section;
1711 if (sec->owner != NULL)
1712 {
1713 if (sec->owner != abfd)
1714 {
1715 if (sec->output_offset != 0)
1716 continue;
1717 sec = sec->output_section;
1718 BFD_ASSERT (sec->owner == abfd);
1719 }
1720 sect_syms[sec->index] = syms[idx];
1721 }
1722 }
1723 }
1724
1725 for (asect = abfd->sections; asect; asect = asect->next)
1726 {
1727 asymbol *sym;
1728
1729 if (sect_syms[asect->index] != NULL)
1730 continue;
1731
1732 sym = bfd_make_empty_symbol (abfd);
1733 if (sym == NULL)
1734 return false;
1735 sym->the_bfd = abfd;
1736 sym->name = asect->name;
1737 sym->value = 0;
1738 /* Set the flags to 0 to indicate that this one was newly added. */
1739 sym->flags = 0;
1740 sym->section = asect;
1741 sect_syms[asect->index] = sym;
1742 num_sections++;
1743#ifdef DEBUG
1744 fprintf (stderr,
1745 "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n",
1746 asect->name, (long) asect->vma, asect->index, (long) asect);
1747#endif
1748 }
1749
1750 /* Classify all of the symbols. */
1751 for (idx = 0; idx < symcount; idx++)
1752 {
1753 if (!sym_is_global (abfd, syms[idx]))
1754 num_locals++;
1755 else
1756 num_globals++;
1757 }
1758 for (asect = abfd->sections; asect; asect = asect->next)
1759 {
1760 if (sect_syms[asect->index] != NULL
1761 && sect_syms[asect->index]->flags == 0)
1762 {
1763 sect_syms[asect->index]->flags = BSF_SECTION_SYM;
1764 if (!sym_is_global (abfd, sect_syms[asect->index]))
1765 num_locals++;
1766 else
1767 num_globals++;
1768 sect_syms[asect->index]->flags = 0;
1769 }
1770 }
1771
1772 /* Now sort the symbols so the local symbols are first. */
1773 new_syms = ((asymbol **)
1774 bfd_alloc (abfd,
1775 (num_locals + num_globals) * sizeof (asymbol *)));
1776 if (new_syms == NULL)
a9713b91 1777 return false;
ede4eed4
KR		 1778
1779 for (idx = 0; idx < symcount; idx++)
1780 {
1781 asymbol *sym = syms[idx];
1782 int i;
1783
1784 if (!sym_is_global (abfd, sym))
1785 i = num_locals2++;
1786 else
1787 i = num_locals + num_globals2++;
1788 new_syms[i] = sym;
1789 sym->udata.i = i + 1;
1790 }
1791 for (asect = abfd->sections; asect; asect = asect->next)
1792 {
1793 if (sect_syms[asect->index] != NULL
1794 && sect_syms[asect->index]->flags == 0)
1795 {
1796 asymbol *sym = sect_syms[asect->index];
1797 int i;
1798
1799 sym->flags = BSF_SECTION_SYM;
1800 if (!sym_is_global (abfd, sym))
1801 i = num_locals2++;
1802 else
1803 i = num_locals + num_globals2++;
1804 new_syms[i] = sym;
1805 sym->udata.i = i + 1;
1806 }
1807 }
1808
1809 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
1810
1811 elf_num_locals (abfd) = num_locals;
1812 elf_num_globals (abfd) = num_globals;
1813 return true;
1814}
1815
fd0198f0
ILT		 1816/* Align to the maximum file alignment that could be required for any
1817 ELF data structure. */
1818
1819static INLINE file_ptr align_file_position PARAMS ((file_ptr, int));
1820static INLINE file_ptr
1821align_file_position (off, align)
1822 file_ptr off;
1823 int align;
1824{
1825 return (off + align - 1) & ~(align - 1);
1826}
1827
1828/* Assign a file position to a section, optionally aligning to the
1829 required section alignment. */
1830
1831INLINE file_ptr
1832_bfd_elf_assign_file_position_for_section (i_shdrp, offset, align)
1833 Elf_Internal_Shdr *i_shdrp;
1834 file_ptr offset;
1835 boolean align;
1836{
1837 if (align)
1838 {
1839 unsigned int al;
1840
1841 al = i_shdrp->sh_addralign;
1842 if (al > 1)
1843 offset = BFD_ALIGN (offset, al);
1844 }
1845 i_shdrp->sh_offset = offset;
1846 if (i_shdrp->bfd_section != NULL)
1847 i_shdrp->bfd_section->filepos = offset;
1848 if (i_shdrp->sh_type != SHT_NOBITS)
1849 offset += i_shdrp->sh_size;
1850 return offset;
1851}
1852
ede4eed4
KR		 1853/* Compute the file positions we are going to put the sections at, and
1854 otherwise prepare to begin writing out the ELF file. If LINK_INFO
1855 is not NULL, this is being called by the ELF backend linker. */
1856
1857boolean
1858_bfd_elf_compute_section_file_positions (abfd, link_info)
1859 bfd *abfd;
1860 struct bfd_link_info *link_info;
1861{
1862 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1863 boolean failed;
1864 struct bfd_strtab_hash *strtab;
1865 Elf_Internal_Shdr *shstrtab_hdr;
1866
1867 if (abfd->output_has_begun)
1868 return true;
1869
1870 /* Do any elf backend specific processing first. */
1871 if (bed->elf_backend_begin_write_processing)
1872 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
1873
1874 if (! prep_headers (abfd))
1875 return false;
1876
1877 failed = false;
1878 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
1879 if (failed)
1880 return false;
1881
1882 if (!assign_section_numbers (abfd))
1883 return false;
1884
1885 /* The backend linker builds symbol table information itself. */
fd0198f0 1886 if (link_info == NULL && abfd->symcount > 0)
ede4eed4
KR		 1887 {
1888 if (! swap_out_syms (abfd, &strtab))
1889 return false;
1890 }
1891
1892 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
1893 /* sh_name was set in prep_headers. */
1894 shstrtab_hdr->sh_type = SHT_STRTAB;
1895 shstrtab_hdr->sh_flags = 0;
1896 shstrtab_hdr->sh_addr = 0;
1897 shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
1898 shstrtab_hdr->sh_entsize = 0;
1899 shstrtab_hdr->sh_link = 0;
1900 shstrtab_hdr->sh_info = 0;
fd0198f0 1901 /* sh_offset is set in assign_file_positions_except_relocs. */
ede4eed4
KR		 1902 shstrtab_hdr->sh_addralign = 1;
1903
fd0198f0 1904 if (!assign_file_positions_except_relocs (abfd))
ede4eed4
KR		 1905 return false;
1906
fd0198f0 1907 if (link_info == NULL && abfd->symcount > 0)
ede4eed4 1908 {
fd0198f0
ILT		 1909 file_ptr off;
1910 Elf_Internal_Shdr *hdr;
1911
1912 off = elf_tdata (abfd)->next_file_pos;
1913
1914 hdr = &elf_tdata (abfd)->symtab_hdr;
1915 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
1916
1917 hdr = &elf_tdata (abfd)->strtab_hdr;
1918 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
1919
1920 elf_tdata (abfd)->next_file_pos = off;
1921
ede4eed4
KR		 1922 /* Now that we know where the .strtab section goes, write it
1923 out. */
fd0198f0 1924 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
ede4eed4
KR		 1925 || ! _bfd_stringtab_emit (abfd, strtab))
1926 return false;
1927 _bfd_stringtab_free (strtab);
1928 }
1929
1930 abfd->output_has_begun = true;
1931
1932 return true;
1933}
1934
fd0198f0 1935/* Create a mapping from a set of sections to a program segment. */
ede4eed4 1936
fd0198f0 1937static INLINE struct elf_segment_map *
edf3fe48 1938make_mapping (abfd, sections, from, to, phdr)
fd0198f0
ILT		 1939 bfd *abfd;
1940 asection **sections;
1941 unsigned int from;
1942 unsigned int to;
edf3fe48 1943 boolean phdr;
ede4eed4 1944{
fd0198f0
ILT		 1945 struct elf_segment_map *m;
1946 unsigned int i;
1947 asection **hdrpp;
1948
1949 m = ((struct elf_segment_map *)
1950 bfd_zalloc (abfd,
1951 (sizeof (struct elf_segment_map)
1952 + (to - from - 1) * sizeof (asection *))));
1953 if (m == NULL)
a9713b91 1954 return NULL;
fd0198f0
ILT		 1955 m->next = NULL;
1956 m->p_type = PT_LOAD;
1957 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
1958 m->sections[i - from] = *hdrpp;
1959 m->count = to - from;
1960
edf3fe48 1961 if (from == 0 && phdr)
6933148a
ILT		 1962 {
1963 /* Include the headers in the first PT_LOAD segment. */
1964 m->includes_filehdr = 1;
1965 m->includes_phdrs = 1;
1966 }
1967
fd0198f0 1968 return m;
ede4eed4
KR		 1969}
1970
fd0198f0 1971/* Set up a mapping from BFD sections to program segments. */
ede4eed4 1972
fd0198f0
ILT		 1973static boolean
1974map_sections_to_segments (abfd)
1975 bfd *abfd;
ede4eed4 1976{
fd0198f0
ILT		 1977 asection **sections = NULL;
1978 asection *s;
1979 unsigned int i;
1980 unsigned int count;
1981 struct elf_segment_map *mfirst;
1982 struct elf_segment_map **pm;
1983 struct elf_segment_map *m;
1984 asection *last_hdr;
1985 unsigned int phdr_index;
1986 bfd_vma maxpagesize;
1987 asection **hdrpp;
edf3fe48
ILT		 1988 boolean phdr_in_section = true;
1989 boolean writable;
1990 asection *dynsec;
fd0198f0
ILT		 1991
1992 if (elf_tdata (abfd)->segment_map != NULL)
1993 return true;
1994
1995 if (bfd_count_sections (abfd) == 0)
1996 return true;
1997
1998 /* Select the allocated sections, and sort them. */
1999
58142f10
ILT		 2000 sections = (asection **) bfd_malloc (bfd_count_sections (abfd)
2001 * sizeof (asection *));
fd0198f0 2002 if (sections == NULL)
58142f10 2003 goto error_return;
ede4eed4 2004
fd0198f0
ILT		 2005 i = 0;
2006 for (s = abfd->sections; s != NULL; s = s->next)
2007 {
2008 if ((s->flags & SEC_ALLOC) != 0)
2009 {
2010 sections[i] = s;
2011 ++i;
2012 }
5fe14a9f 2013 }
fd0198f0
ILT		 2014 BFD_ASSERT (i <= bfd_count_sections (abfd));
2015 count = i;
ede4eed4 2016
fd0198f0 2017 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
ede4eed4 2018
fd0198f0 2019 /* Build the mapping. */
ede4eed4 2020
fd0198f0
ILT		 2021 mfirst = NULL;
2022 pm = &mfirst;
ede4eed4 2023
fd0198f0
ILT		 2024 /* If we have a .interp section, then create a PT_PHDR segment for
2025 the program headers and a PT_INTERP segment for the .interp
2026 section. */
2027 s = bfd_get_section_by_name (abfd, ".interp");
2028 if (s != NULL && (s->flags & SEC_LOAD) != 0)
2029 {
2030 m = ((struct elf_segment_map *)
2031 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2032 if (m == NULL)
a9713b91 2033 goto error_return;
fd0198f0
ILT		 2034 m->next = NULL;
2035 m->p_type = PT_PHDR;
2036 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
2037 m->p_flags = PF_R | PF_X;
2038 m->p_flags_valid = 1;
6933148a 2039 m->includes_phdrs = 1;
ede4eed4 2040
fd0198f0
ILT		 2041 *pm = m;
2042 pm = &m->next;
ede4eed4 2043
fd0198f0
ILT		 2044 m = ((struct elf_segment_map *)
2045 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2046 if (m == NULL)
a9713b91 2047 goto error_return;
fd0198f0
ILT		 2048 m->next = NULL;
2049 m->p_type = PT_INTERP;
2050 m->count = 1;
2051 m->sections[0] = s;
ede4eed4 2052
fd0198f0
ILT		 2053 *pm = m;
2054 pm = &m->next;
2055 }
ede4eed4 2056
fd0198f0
ILT		 2057 /* Look through the sections. We put sections in the same program
2058 segment when the start of the second section can be placed within
2059 a few bytes of the end of the first section. */
2060 last_hdr = NULL;
2061 phdr_index = 0;
2062 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
edf3fe48
ILT		 2063 writable = false;
2064 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
2065 if (dynsec != NULL
2066 && (dynsec->flags & SEC_LOAD) == 0)
2067 dynsec = NULL;
2068
7fc6a16a
ILT		 2069 /* Deal with -Ttext or something similar such that the first section
2070 is not adjacent to the program headers. This is an
2071 approximation, since at this point we don't know exactly how many
2072 program headers we will need. */
2073 if (count > 0)
2074 {
2075 bfd_size_type phdr_size;
2076
2077 phdr_size = elf_tdata (abfd)->program_header_size;
2078 if (phdr_size == 0)
2079 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
cdb88e87
ILT		 2080 if ((abfd->flags & D_PAGED) == 0
2081 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
7fc6a16a
ILT		 2082 phdr_in_section = false;
2083 }
edf3fe48 2084
fd0198f0 2085 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
ede4eed4 2086 {
fd0198f0 2087 asection *hdr;
191d910c 2088 boolean new_segment;
ede4eed4 2089
fd0198f0 2090 hdr = *hdrpp;
ede4eed4 2091
fd0198f0 2092 /* See if this section and the last one will fit in the same
191d910c
ILT		 2093 segment. */
2094
2095 if (last_hdr == NULL)
2096 {
2097 /* If we don't have a segment yet, then we don't need a new
2098 one (we build the last one after this loop). */
2099 new_segment = false;
2100 }
2101 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
2102 {
2103 /* If this section has a different relation between the
2104 virtual address and the load address, then we need a new
2105 segment. */
2106 new_segment = true;
2107 }
191d910c
ILT		 2108 else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
2109 < hdr->lma)
2110 {
2111 /* If putting this section in this segment would force us to
2112 skip a page in the segment, then we need a new segment. */
2113 new_segment = true;
2114 }
f0c12b73
DE		 2115 else if ((abfd->flags & D_PAGED) == 0)
2116 {
2117 /* If the file is not demand paged, which means that we
2118 don't require the sections to be correctly aligned in the
2119 file, then there is no other reason for a new segment. */
2120 new_segment = false;
2121 }
191d910c
ILT		 2122 else if ((last_hdr->flags & SEC_LOAD) == 0
2123 && (hdr->flags & SEC_LOAD) != 0)
2124 {
2125 /* We don't want to put a loadable section after a
2126 nonloadable section in the same segment. */
2127 new_segment = true;
2128 }
2129 else if (! writable
2130 && (hdr->flags & SEC_READONLY) == 0
2131 && (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
2132 == hdr->lma))
2133 {
2134 /* We don't want to put a writable section in a read only
2135 segment, unless they are on the same page in memory
2136 anyhow. We already know that the last section does not
2137 bring us past the current section on the page, so the
2138 only case in which the new section is not on the same
2139 page as the previous section is when the previous section
2140 ends precisely on a page boundary. */
2141 new_segment = true;
2142 }
2143 else
2144 {
2145 /* Otherwise, we can use the same segment. */
2146 new_segment = false;
2147 }
2148
2149 if (! new_segment)
fd0198f0 2150 {
50bd50d4
MH		 2151 if ((hdr->flags & SEC_READONLY) == 0)
2152 writable = true;
fd0198f0
ILT		 2153 last_hdr = hdr;
2154 continue;
2155 }
ede4eed4 2156
191d910c
ILT		 2157 /* We need a new program segment. We must create a new program
2158 header holding all the sections from phdr_index until hdr. */
ede4eed4 2159
edf3fe48 2160 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_section);
fd0198f0
ILT		 2161 if (m == NULL)
2162 goto error_return;
ede4eed4 2163
fd0198f0
ILT		 2164 *pm = m;
2165 pm = &m->next;
ede4eed4 2166
edf3fe48
ILT		 2167 if ((hdr->flags & SEC_READONLY) == 0)
2168 writable = true;
50bd50d4
MH		 2169 else
2170 writable = false;
edf3fe48 2171
fd0198f0
ILT		 2172 last_hdr = hdr;
2173 phdr_index = i;
edf3fe48 2174 phdr_in_section = false;
ede4eed4 2175 }
fd0198f0
ILT		 2176
2177 /* Create a final PT_LOAD program segment. */
2178 if (last_hdr != NULL)
ede4eed4 2179 {
edf3fe48 2180 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_section);
fd0198f0
ILT		 2181 if (m == NULL)
2182 goto error_return;
2183
2184 *pm = m;
2185 pm = &m->next;
ede4eed4
KR		 2186 }
2187
fd0198f0 2188 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
edf3fe48 2189 if (dynsec != NULL)
ede4eed4 2190 {
fd0198f0
ILT		 2191 m = ((struct elf_segment_map *)
2192 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2193 if (m == NULL)
a9713b91 2194 goto error_return;
fd0198f0
ILT		 2195 m->next = NULL;
2196 m->p_type = PT_DYNAMIC;
2197 m->count = 1;
edf3fe48 2198 m->sections[0] = dynsec;
ede4eed4 2199
fd0198f0
ILT		 2200 *pm = m;
2201 pm = &m->next;
ede4eed4
KR		 2202 }
2203
a66a61a0
ILT		 2204 /* For each loadable .note section, add a PT_NOTE segment. We don't
2205 use bfd_get_section_by_name, because if we link together
2206 nonloadable .note sections and loadable .note sections, we will
2207 generate two .note sections in the output file. FIXME: Using
2208 names for section types is bogus anyhow. */
2209 for (s = abfd->sections; s != NULL; s = s->next)
2210 {
2211 if ((s->flags & SEC_LOAD) != 0
2212 && strncmp (s->name, ".note", 5) == 0)
2213 {
2214 m = ((struct elf_segment_map *)
2215 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2216 if (m == NULL)
2217 goto error_return;
2218 m->next = NULL;
2219 m->p_type = PT_NOTE;
2220 m->count = 1;
2221 m->sections[0] = s;
2222
2223 *pm = m;
2224 pm = &m->next;
2225 }
2226 }
2227
fd0198f0
ILT		 2228 free (sections);
2229 sections = NULL;
ae115e51 2230
fd0198f0
ILT		 2231 elf_tdata (abfd)->segment_map = mfirst;
2232 return true;
2233
2234 error_return:
2235 if (sections != NULL)
2236 free (sections);
2237 return false;
ede4eed4
KR		 2238}
2239
fd0198f0 2240/* Sort sections by VMA. */
ede4eed4 2241
fd0198f0
ILT		 2242static int
2243elf_sort_sections (arg1, arg2)
2244 const PTR arg1;
2245 const PTR arg2;
ede4eed4 2246{
fd0198f0
ILT		 2247 const asection *sec1 = *(const asection **) arg1;
2248 const asection *sec2 = *(const asection **) arg2;
ede4eed4 2249
fd0198f0
ILT		 2250 if (sec1->vma < sec2->vma)
2251 return -1;
2252 else if (sec1->vma > sec2->vma)
2253 return 1;
ede4eed4 2254
cdb88e87
ILT		 2255 /* Sort by LMA. Normally the LMA and the VMA will be the same, and
2256 this will do nothing. */
2257 if (sec1->lma < sec2->lma)
2258 return -1;
2259 else if (sec1->lma > sec2->lma)
2260 return 1;
2261
fd0198f0 2262 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
ede4eed4 2263
fd0198f0 2264#define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
ede4eed4 2265
fd0198f0
ILT		 2266 if (TOEND (sec1))
2267 if (TOEND (sec2))
2268 return sec1->target_index - sec2->target_index;
2269 else
2270 return 1;
ede4eed4 2271
fd0198f0
ILT		 2272 if (TOEND (sec2))
2273 return -1;
ede4eed4 2274
fd0198f0 2275#undef TOEND
ede4eed4 2276
fd0198f0
ILT		 2277 /* Sort by size, to put zero sized sections before others at the
2278 same address. */
ede4eed4 2279
fd0198f0
ILT		 2280 if (sec1->_raw_size < sec2->_raw_size)
2281 return -1;
2282 if (sec1->_raw_size > sec2->_raw_size)
2283 return 1;
ede4eed4 2284
fd0198f0
ILT		 2285 return sec1->target_index - sec2->target_index;
2286}
ede4eed4 2287
fd0198f0
ILT		 2288/* Assign file positions to the sections based on the mapping from
2289 sections to segments. This function also sets up some fields in
2290 the file header, and writes out the program headers. */
ede4eed4 2291
fd0198f0
ILT		 2292static boolean
2293assign_file_positions_for_segments (abfd)
2294 bfd *abfd;
2295{
2296 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2297 unsigned int count;
2298 struct elf_segment_map *m;
2299 unsigned int alloc;
2300 Elf_Internal_Phdr *phdrs;
64f808f9 2301 file_ptr off, voff;
6933148a
ILT		 2302 bfd_vma filehdr_vaddr, filehdr_paddr;
2303 bfd_vma phdrs_vaddr, phdrs_paddr;
fd0198f0
ILT		 2304 Elf_Internal_Phdr *p;
2305
2306 if (elf_tdata (abfd)->segment_map == NULL)
2307 {
2308 if (! map_sections_to_segments (abfd))
2309 return false;
2310 }
ede4eed4 2311
5b3b9ff6
ILT		 2312 if (bed->elf_backend_modify_segment_map)
2313 {
2314 if (! (*bed->elf_backend_modify_segment_map) (abfd))
2315 return false;
2316 }
2317
fd0198f0
ILT		 2318 count = 0;
2319 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
2320 ++count;
ede4eed4 2321
fd0198f0
ILT		 2322 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
2323 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
2324 elf_elfheader (abfd)->e_phnum = count;
ede4eed4 2325
fd0198f0
ILT		 2326 if (count == 0)
2327 return true;
ede4eed4 2328
fd0198f0
ILT		 2329 /* If we already counted the number of program segments, make sure
2330 that we allocated enough space. This happens when SIZEOF_HEADERS
2331 is used in a linker script. */
2332 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
2333 if (alloc != 0 && count > alloc)
2334 {
2335 ((*_bfd_error_handler)
2336 ("%s: Not enough room for program headers (allocated %u, need %u)",
2337 bfd_get_filename (abfd), alloc, count));
2338 bfd_set_error (bfd_error_bad_value);
2339 return false;
ede4eed4
KR		 2340 }
2341
fd0198f0
ILT		 2342 if (alloc == 0)
2343 alloc = count;
2344
2345 phdrs = ((Elf_Internal_Phdr *)
2346 bfd_alloc (abfd, alloc * sizeof (Elf_Internal_Phdr)));
2347 if (phdrs == NULL)
a9713b91 2348 return false;
ede4eed4 2349
fd0198f0
ILT		 2350 off = bed->s->sizeof_ehdr;
2351 off += alloc * bed->s->sizeof_phdr;
ede4eed4 2352
6933148a
ILT		 2353 filehdr_vaddr = 0;
2354 filehdr_paddr = 0;
2355 phdrs_vaddr = 0;
2356 phdrs_paddr = 0;
fd0198f0
ILT		 2357 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
2358 m != NULL;
2359 m = m->next, p++)
2360 {
2361 unsigned int i;
2362 asection **secpp;
fd0198f0 2363
3b950780
ILT		 2364 /* If elf_segment_map is not from map_sections_to_segments, the
2365 sections may not be correctly ordered. */
2366 if (m->count > 0)
2367 qsort (m->sections, (size_t) m->count, sizeof (asection *),
2368 elf_sort_sections);
2369
fd0198f0
ILT		 2370 p->p_type = m->p_type;
2371
2372 if (m->p_flags_valid)
2373 p->p_flags = m->p_flags;
14899eb7
ILT		 2374 else
2375 p->p_flags = 0;
fd0198f0 2376
d49ddb85
ILT		 2377 if (p->p_type == PT_LOAD
2378 && m->count > 0
d7775b43 2379 && (m->sections[0]->flags & SEC_ALLOC) != 0)
cdb88e87
ILT		 2380 {
2381 if ((abfd->flags & D_PAGED) != 0)
2382 off += (m->sections[0]->vma - off) % bed->maxpagesize;
2383 else
2384 off += ((m->sections[0]->vma - off)
2385 % (1 << bfd_get_section_alignment (abfd, m->sections[0])));
2386 }
44ef8897 2387
fd0198f0
ILT		 2388 if (m->count == 0)
2389 p->p_vaddr = 0;
2390 else
2391 p->p_vaddr = m->sections[0]->vma;
ede4eed4 2392
fd0198f0
ILT		 2393 if (m->p_paddr_valid)
2394 p->p_paddr = m->p_paddr;
2395 else if (m->count == 0)
2396 p->p_paddr = 0;
2397 else
2398 p->p_paddr = m->sections[0]->lma;
2399
cdb88e87
ILT		 2400 if (p->p_type == PT_LOAD
2401 && (abfd->flags & D_PAGED) != 0)
fd0198f0
ILT		 2402 p->p_align = bed->maxpagesize;
2403 else if (m->count == 0)
2404 p->p_align = bed->s->file_align;
2405 else
2406 p->p_align = 0;
2407
6933148a 2408 p->p_offset = 0;
fd0198f0
ILT		 2409 p->p_filesz = 0;
2410 p->p_memsz = 0;
2411
6933148a 2412 if (m->includes_filehdr)
ede4eed4 2413 {
14899eb7
ILT		 2414 if (! m->p_flags_valid)
2415 p->p_flags |= PF_R;
6933148a
ILT		 2416 p->p_offset = 0;
2417 p->p_filesz = bed->s->sizeof_ehdr;
2418 p->p_memsz = bed->s->sizeof_ehdr;
2419 if (m->count > 0)
2420 {
2421 BFD_ASSERT (p->p_type == PT_LOAD);
2422 p->p_vaddr -= off;
2423 if (! m->p_paddr_valid)
2424 p->p_paddr -= off;
2425 }
2426 if (p->p_type == PT_LOAD)
2427 {
2428 filehdr_vaddr = p->p_vaddr;
2429 filehdr_paddr = p->p_paddr;
2430 }
2431 }
fd0198f0 2432
6933148a
ILT		 2433 if (m->includes_phdrs)
2434 {
14899eb7
ILT		 2435 if (! m->p_flags_valid)
2436 p->p_flags |= PF_R;
6933148a 2437 if (m->includes_filehdr)
fd0198f0 2438 {
6933148a 2439 if (p->p_type == PT_LOAD)
fd0198f0 2440 {
6933148a
ILT		 2441 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
2442 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
fd0198f0 2443 }
6933148a
ILT		 2444 }
2445 else
2446 {
2447 p->p_offset = bed->s->sizeof_ehdr;
2448 if (m->count > 0)
2449 {
2450 BFD_ASSERT (p->p_type == PT_LOAD);
2451 p->p_vaddr -= off - p->p_offset;
2452 if (! m->p_paddr_valid)
2453 p->p_paddr -= off - p->p_offset;
2454 }
2455 if (p->p_type == PT_LOAD)
fd0198f0 2456 {
6933148a
ILT		 2457 phdrs_vaddr = p->p_vaddr;
2458 phdrs_paddr = p->p_paddr;
fd0198f0 2459 }
6933148a
ILT		 2460 }
2461 p->p_filesz += alloc * bed->s->sizeof_phdr;
2462 p->p_memsz += alloc * bed->s->sizeof_phdr;
2463 }
2464
2465 if (p->p_type == PT_LOAD)
2466 {
2467 if (! m->includes_filehdr && ! m->includes_phdrs)
2468 p->p_offset = off;
2469 else
2470 {
2471 file_ptr adjust;
fd0198f0 2472
6933148a
ILT		 2473 adjust = off - (p->p_offset + p->p_filesz);
2474 p->p_filesz += adjust;
2475 p->p_memsz += adjust;
fd0198f0 2476 }
ede4eed4
KR		 2477 }
2478
64f808f9 2479 voff = off;
fd0198f0 2480 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
ede4eed4 2481 {
fd0198f0
ILT		 2482 asection *sec;
2483 flagword flags;
2484 bfd_size_type align;
2485
2486 sec = *secpp;
2487 flags = sec->flags;
cdb88e87 2488 align = 1 << bfd_get_section_alignment (abfd, sec);
fd0198f0
ILT		 2489
2490 if (p->p_type == PT_LOAD)
2491 {
2492 bfd_vma adjust;
2493
2494 /* The section VMA must equal the file position modulo
2495 the page size. */
09609415 2496 if ((flags & SEC_ALLOC) != 0)
fd0198f0 2497 {
cdb88e87
ILT		 2498 if ((abfd->flags & D_PAGED) != 0)
2499 adjust = (sec->vma - voff) % bed->maxpagesize;
2500 else
2501 adjust = (sec->vma - voff) % align;
d49ddb85
ILT		 2502 if (adjust != 0)
2503 {
2504 if (i == 0)
2505 abort ();
2506 p->p_memsz += adjust;
19bfbcbe 2507 off += adjust;
64f808f9 2508 voff += adjust;
d49ddb85 2509 if ((flags & SEC_LOAD) != 0)
19bfbcbe 2510 p->p_filesz += adjust;
d49ddb85 2511 }
fd0198f0
ILT		 2512 }
2513
2514 sec->filepos = off;
2515
2516 if ((flags & SEC_LOAD) != 0)
2517 off += sec->_raw_size;
64f808f9
ILT		 2518 if ((flags & SEC_ALLOC) != 0)
2519 voff += sec->_raw_size;
fd0198f0
ILT		 2520 }
2521
2522 p->p_memsz += sec->_raw_size;
2523
2524 if ((flags & SEC_LOAD) != 0)
2525 p->p_filesz += sec->_raw_size;
2526
fd0198f0
ILT		 2527 if (align > p->p_align)
2528 p->p_align = align;
2529
2530 if (! m->p_flags_valid)
2531 {
14899eb7 2532 p->p_flags |= PF_R;
fd0198f0
ILT		 2533 if ((flags & SEC_CODE) != 0)
2534 p->p_flags |= PF_X;
2535 if ((flags & SEC_READONLY) == 0)
2536 p->p_flags |= PF_W;
2537 }
ede4eed4 2538 }
fd0198f0 2539 }
ede4eed4 2540
fd0198f0
ILT		 2541 /* Now that we have set the section file positions, we can set up
2542 the file positions for the non PT_LOAD segments. */
2543 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
2544 m != NULL;
2545 m = m->next, p++)
2546 {
2547 if (p->p_type != PT_LOAD && m->count > 0)
ede4eed4 2548 {
6933148a
ILT		 2549 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
2550 p->p_offset = m->sections[0]->filepos;
2551 }
2552 if (m->count == 0)
2553 {
2554 if (m->includes_filehdr)
2555 {
2556 p->p_vaddr = filehdr_vaddr;
2557 if (! m->p_paddr_valid)
2558 p->p_paddr = filehdr_paddr;
2559 }
2560 else if (m->includes_phdrs)
2561 {
2562 p->p_vaddr = phdrs_vaddr;
2563 if (! m->p_paddr_valid)
2564 p->p_paddr = phdrs_paddr;
2565 }
ede4eed4 2566 }
ede4eed4
KR		 2567 }
2568
fd0198f0
ILT		 2569 /* Clear out any program headers we allocated but did not use. */
2570 for (; count < alloc; count++, p++)
ede4eed4 2571 {
fd0198f0
ILT		 2572 memset (p, 0, sizeof *p);
2573 p->p_type = PT_NULL;
ede4eed4
KR		 2574 }
2575
fd0198f0 2576 elf_tdata (abfd)->phdr = phdrs;
ede4eed4 2577
fd0198f0 2578 elf_tdata (abfd)->next_file_pos = off;
ede4eed4 2579
fd0198f0
ILT		 2580 /* Write out the program headers. */
2581 if (bfd_seek (abfd, bed->s->sizeof_ehdr, SEEK_SET) != 0
2582 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
2583 return false;
2584
2585 return true;
2586}
2587
2588/* Get the size of the program header.
2589
2590 If this is called by the linker before any of the section VMA's are set, it
2591 can't calculate the correct value for a strange memory layout. This only
2592 happens when SIZEOF_HEADERS is used in a linker script. In this case,
2593 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
2594 data segment (exclusive of .interp and .dynamic).
2595
2596 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
2597 will be two segments. */
2598
2599static bfd_size_type
2600get_program_header_size (abfd)
2601 bfd *abfd;
2602{
2603 size_t segs;
2604 asection *s;
2605 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2606
2607 /* We can't return a different result each time we're called. */
2608 if (elf_tdata (abfd)->program_header_size != 0)
2609 return elf_tdata (abfd)->program_header_size;
ae115e51 2610
3b950780
ILT		 2611 if (elf_tdata (abfd)->segment_map != NULL)
2612 {
2613 struct elf_segment_map *m;
2614
2615 segs = 0;
2616 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
2617 ++segs;
2618 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
2619 return elf_tdata (abfd)->program_header_size;
2620 }
2621
fd0198f0
ILT		 2622 /* Assume we will need exactly two PT_LOAD segments: one for text
2623 and one for data. */
2624 segs = 2;
2625
2626 s = bfd_get_section_by_name (abfd, ".interp");
2627 if (s != NULL && (s->flags & SEC_LOAD) != 0)
ede4eed4 2628 {
fd0198f0
ILT		 2629 /* If we have a loadable interpreter section, we need a
2630 PT_INTERP segment. In this case, assume we also need a
2631 PT_PHDR segment, although that may not be true for all
2632 targets. */
2633 segs += 2;
ede4eed4
KR		 2634 }
2635
fd0198f0 2636 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
ede4eed4 2637 {
fd0198f0
ILT		 2638 /* We need a PT_DYNAMIC segment. */
2639 ++segs;
ede4eed4 2640 }
ede4eed4 2641
a66a61a0
ILT		 2642 for (s = abfd->sections; s != NULL; s = s->next)
2643 {
2644 if ((s->flags & SEC_LOAD) != 0
2645 && strncmp (s->name, ".note", 5) == 0)
2646 {
2647 /* We need a PT_NOTE segment. */
2648 ++segs;
2649 }
2650 }
2651
fd0198f0 2652 /* Let the backend count up any program headers it might need. */
5b3b9ff6
ILT		 2653 if (bed->elf_backend_additional_program_headers)
2654 {
2655 int a;
2656
2657 a = (*bed->elf_backend_additional_program_headers) (abfd);
2658 if (a == -1)
2659 abort ();
2660 segs += a;
2661 }
ede4eed4 2662
fd0198f0
ILT		 2663 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
2664 return elf_tdata (abfd)->program_header_size;
ede4eed4
KR		 2665}
2666
2667/* Work out the file positions of all the sections. This is called by
2668 _bfd_elf_compute_section_file_positions. All the section sizes and
2669 VMAs must be known before this is called.
2670
2671 We do not consider reloc sections at this point, unless they form
2672 part of the loadable image. Reloc sections are assigned file
2673 positions in assign_file_positions_for_relocs, which is called by
2674 write_object_contents and final_link.
2675
fd0198f0 2676 We also don't set the positions of the .symtab and .strtab here. */
ede4eed4
KR		 2677
2678static boolean
fd0198f0 2679assign_file_positions_except_relocs (abfd)
ede4eed4 2680 bfd *abfd;
ede4eed4
KR		 2681{
2682 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
2683 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
2684 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
2685 file_ptr off;
2686 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2687
ede4eed4
KR		 2688 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
2689 {
2690 Elf_Internal_Shdr **hdrpp;
2691 unsigned int i;
2692
fd0198f0
ILT		 2693 /* Start after the ELF header. */
2694 off = i_ehdrp->e_ehsize;
2695
ede4eed4
KR		 2696 /* We are not creating an executable, which means that we are
2697 not creating a program header, and that the actual order of
2698 the sections in the file is unimportant. */
2699 for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
2700 {
2701 Elf_Internal_Shdr *hdr;
2702
2703 hdr = *hdrpp;
2704 if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
2705 {
2706 hdr->sh_offset = -1;
2707 continue;
2708 }
fd0198f0
ILT		 2709 if (i == tdata->symtab_section
2710 || i == tdata->strtab_section)
ede4eed4
KR		 2711 {
2712 hdr->sh_offset = -1;
2713 continue;
2714 }
2715
5fe14a9f 2716 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
ede4eed4
KR		 2717 }
2718 }
2719 else
2720 {
ede4eed4 2721 unsigned int i;
fd0198f0 2722 Elf_Internal_Shdr **hdrpp;
ede4eed4 2723
fd0198f0
ILT		 2724 /* Assign file positions for the loaded sections based on the
2725 assignment of sections to segments. */
2726 if (! assign_file_positions_for_segments (abfd))
ede4eed4
KR		 2727 return false;
2728
fd0198f0
ILT		 2729 /* Assign file positions for the other sections. */
2730
2731 off = elf_tdata (abfd)->next_file_pos;
2732 for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
ede4eed4
KR		 2733 {
2734 Elf_Internal_Shdr *hdr;
2735
2736 hdr = *hdrpp;
fd0198f0
ILT		 2737 if (hdr->bfd_section != NULL
2738 && hdr->bfd_section->filepos != 0)
2739 hdr->sh_offset = hdr->bfd_section->filepos;
2740 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
ede4eed4 2741 {
fd0198f0
ILT		 2742 ((*_bfd_error_handler)
2743 ("%s: warning: allocated section `%s' not in segment",
2744 bfd_get_filename (abfd),
2745 (hdr->bfd_section == NULL
2746 ? "*unknown*"
2747 : hdr->bfd_section->name)));
cdb88e87
ILT		 2748 if ((abfd->flags & D_PAGED) != 0)
2749 off += (hdr->sh_addr - off) % bed->maxpagesize;
2750 else
2751 off += (hdr->sh_addr - off) % hdr->sh_addralign;
5fe14a9f
ILT		 2752 off = _bfd_elf_assign_file_position_for_section (hdr, off,
2753 false);
ede4eed4 2754 }
fd0198f0
ILT		 2755 else if (hdr->sh_type == SHT_REL
2756 || hdr->sh_type == SHT_RELA
2757 || hdr == i_shdrpp[tdata->symtab_section]
2758 || hdr == i_shdrpp[tdata->strtab_section])
2759 hdr->sh_offset = -1;
2760 else
2761 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
2762 }
ede4eed4
KR		 2763 }
2764
2765 /* Place the section headers. */
2766 off = align_file_position (off, bed->s->file_align);
2767 i_ehdrp->e_shoff = off;
2768 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
2769
2770 elf_tdata (abfd)->next_file_pos = off;
2771
2772 return true;
2773}
2774
ede4eed4
KR		 2775static boolean
2776prep_headers (abfd)
2777 bfd *abfd;
2778{
2779 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
2780 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
2781 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
2782 int count;
2783 struct bfd_strtab_hash *shstrtab;
2784 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2785
2786 i_ehdrp = elf_elfheader (abfd);
2787 i_shdrp = elf_elfsections (abfd);
2788
2789 shstrtab = _bfd_elf_stringtab_init ();
2790 if (shstrtab == NULL)
2791 return false;
2792
2793 elf_shstrtab (abfd) = shstrtab;
2794
2795 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
2796 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
2797 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
2798 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
2799
2800 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
2801 i_ehdrp->e_ident[EI_DATA] =
86587dd4 2802 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
ede4eed4
KR		 2803 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
2804
2805 for (count = EI_PAD; count < EI_NIDENT; count++)
2806 i_ehdrp->e_ident[count] = 0;
2807
2808 if ((abfd->flags & DYNAMIC) != 0)
2809 i_ehdrp->e_type = ET_DYN;
2810 else if ((abfd->flags & EXEC_P) != 0)
2811 i_ehdrp->e_type = ET_EXEC;
2812 else
2813 i_ehdrp->e_type = ET_REL;
2814
2815 switch (bfd_get_arch (abfd))
2816 {
2817 case bfd_arch_unknown:
2818 i_ehdrp->e_machine = EM_NONE;
2819 break;
2820 case bfd_arch_sparc:
2821 if (bed->s->arch_size == 64)
2822 i_ehdrp->e_machine = EM_SPARC64;
2823 else
2824 i_ehdrp->e_machine = EM_SPARC;
2825 break;
2826 case bfd_arch_i386:
2827 i_ehdrp->e_machine = EM_386;
2828 break;
2829 case bfd_arch_m68k:
2830 i_ehdrp->e_machine = EM_68K;
2831 break;
2832 case bfd_arch_m88k:
2833 i_ehdrp->e_machine = EM_88K;
2834 break;
2835 case bfd_arch_i860:
2836 i_ehdrp->e_machine = EM_860;
2837 break;
2838 case bfd_arch_mips: /* MIPS Rxxxx */
2839 i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
2840 break;
2841 case bfd_arch_hppa:
2842 i_ehdrp->e_machine = EM_PARISC;
2843 break;
2844 case bfd_arch_powerpc:
2845 i_ehdrp->e_machine = EM_PPC;
2846 break;
50bd50d4
MH		 2847 case bfd_arch_alpha:
2848 i_ehdrp->e_machine = EM_ALPHA;
2849 break;
f0c12b73
DE		 2850 case bfd_arch_sh:
2851 i_ehdrp->e_machine = EM_SH;
2852 break;
50bd50d4
MH		 2853 case bfd_arch_d10v:
2854 i_ehdrp->e_machine = EM_CYGNUS_D10V;
2855 break;
fd8d7c31
MH		 2856/* start-sanitize-d30v */
2857 case bfd_arch_d30v:
2858 i_ehdrp->e_machine = EM_CYGNUS_D30V;
2859 break;
2860/* end-sanitize-d30v */
f0c12b73
DE		 2861/* start-sanitize-v850 */
2862 case bfd_arch_v850:
2863 i_ehdrp->e_machine = EM_CYGNUS_V850;
2864 break;
2865/* end-sanitize-v850 */
ede4eed4
KR		 2866/* start-sanitize-arc */
2867 case bfd_arch_arc:
2868 i_ehdrp->e_machine = EM_CYGNUS_ARC;
2869 break;
2870/* end-sanitize-arc */
f0c12b73
DE		 2871/* start-sanitize-m32r */
2872 case bfd_arch_m32r:
2873 i_ehdrp->e_machine = EM_CYGNUS_M32R;
2874 break;
2875/* end-sanitize-m32r */
80be821d
ILT		 2876 case bfd_arch_mn10200:
2877 i_ehdrp->e_machine = EM_CYGNUS_MN10200;
2878 break;
2879 case bfd_arch_mn10300:
2880 i_ehdrp->e_machine = EM_CYGNUS_MN10300;
efc2b064 2881 break;
ede4eed4
KR		 2882 /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
2883 default:
2884 i_ehdrp->e_machine = EM_NONE;
2885 }
2886 i_ehdrp->e_version = bed->s->ev_current;
2887 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
2888
2889 /* no program header, for now. */
2890 i_ehdrp->e_phoff = 0;
2891 i_ehdrp->e_phentsize = 0;
2892 i_ehdrp->e_phnum = 0;
2893
2894 /* each bfd section is section header entry */
2895 i_ehdrp->e_entry = bfd_get_start_address (abfd);
2896 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
2897
2898 /* if we're building an executable, we'll need a program header table */
2899 if (abfd->flags & EXEC_P)
2900 {
2901 /* it all happens later */
2902#if 0
2903 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
2904
2905 /* elf_build_phdrs() returns a (NULL-terminated) array of
2906 Elf_Internal_Phdrs */
2907 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
2908 i_ehdrp->e_phoff = outbase;
2909 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
2910#endif
2911 }
2912 else
2913 {
2914 i_ehdrp->e_phentsize = 0;
2915 i_phdrp = 0;
2916 i_ehdrp->e_phoff = 0;
2917 }
2918
2919 elf_tdata (abfd)->symtab_hdr.sh_name =
2920 (unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false);
2921 elf_tdata (abfd)->strtab_hdr.sh_name =
2922 (unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false);
2923 elf_tdata (abfd)->shstrtab_hdr.sh_name =
2924 (unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false);
2925 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
2926 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
2927 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
2928 return false;
2929
2930 return true;
2931}
2932
2933/* Assign file positions for all the reloc sections which are not part
2934 of the loadable file image. */
2935
2936void
2937_bfd_elf_assign_file_positions_for_relocs (abfd)
2938 bfd *abfd;
2939{
2940 file_ptr off;
2941 unsigned int i;
2942 Elf_Internal_Shdr **shdrpp;
2943
2944 off = elf_tdata (abfd)->next_file_pos;
2945
2946 for (i = 1, shdrpp = elf_elfsections (abfd) + 1;
2947 i < elf_elfheader (abfd)->e_shnum;
2948 i++, shdrpp++)
2949 {
2950 Elf_Internal_Shdr *shdrp;
2951
2952 shdrp = *shdrpp;
2953 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
2954 && shdrp->sh_offset == -1)
5fe14a9f 2955 off = _bfd_elf_assign_file_position_for_section (shdrp, off, true);
ede4eed4
KR		 2956 }
2957
2958 elf_tdata (abfd)->next_file_pos = off;
2959}
2960
2961boolean
2962_bfd_elf_write_object_contents (abfd)
2963 bfd *abfd;
2964{
2965 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2966 Elf_Internal_Ehdr *i_ehdrp;
2967 Elf_Internal_Shdr **i_shdrp;
2968 boolean failed;
2969 unsigned int count;
2970
2971 if (! abfd->output_has_begun
2972 && ! _bfd_elf_compute_section_file_positions (abfd,
2973 (struct bfd_link_info *) NULL))
2974 return false;
2975
2976 i_shdrp = elf_elfsections (abfd);
2977 i_ehdrp = elf_elfheader (abfd);
2978
2979 failed = false;
2980 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
2981 if (failed)
2982 return false;
2983 _bfd_elf_assign_file_positions_for_relocs (abfd);
2984
2985 /* After writing the headers, we need to write the sections too... */
2986 for (count = 1; count < i_ehdrp->e_shnum; count++)
2987 {
2988 if (bed->elf_backend_section_processing)
2989 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
2990 if (i_shdrp[count]->contents)
2991 {
2992 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
2993 || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size,
2994 1, abfd)
2995 != i_shdrp[count]->sh_size))
2996 return false;
2997 }
2998 }
2999
3000 /* Write out the section header names. */
3001 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
3002 || ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd)))
3003 return false;
3004
3005 if (bed->elf_backend_final_write_processing)
3006 (*bed->elf_backend_final_write_processing) (abfd,
3007 elf_tdata (abfd)->linker);
3008
3009 return bed->s->write_shdrs_and_ehdr (abfd);
3010}
3011
3012/* given a section, search the header to find them... */
3013int
3014_bfd_elf_section_from_bfd_section (abfd, asect)
3015 bfd *abfd;
3016 struct sec *asect;
3017{
3018 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3019 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
3020 int index;
3021 Elf_Internal_Shdr *hdr;
3022 int maxindex = elf_elfheader (abfd)->e_shnum;
3023
3024 for (index = 0; index < maxindex; index++)
3025 {
3026 hdr = i_shdrp[index];
3027 if (hdr->bfd_section == asect)
3028 return index;
3029 }
3030
3031 if (bed->elf_backend_section_from_bfd_section)
3032 {
3033 for (index = 0; index < maxindex; index++)
3034 {
3035 int retval;
3036
3037 hdr = i_shdrp[index];
3038 retval = index;
3039 if ((*bed->elf_backend_section_from_bfd_section)
3040 (abfd, hdr, asect, &retval))
3041 return retval;
3042 }
3043 }
3044
3045 if (bfd_is_abs_section (asect))
3046 return SHN_ABS;
3047 if (bfd_is_com_section (asect))
3048 return SHN_COMMON;
3049 if (bfd_is_und_section (asect))
3050 return SHN_UNDEF;
3051
3052 return -1;
3053}
3054
cb84f028
ILT		 3055/* Given a BFD symbol, return the index in the ELF symbol table, or -1
3056 on error. */
3057
3058int
ede4eed4
KR		 3059_bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
3060 bfd *abfd;
7fc6a16a 3061 asymbol **asym_ptr_ptr;
ede4eed4 3062{
7fc6a16a 3063 asymbol *asym_ptr = *asym_ptr_ptr;
ede4eed4
KR		 3064 int idx;
3065 flagword flags = asym_ptr->flags;
3066
3067 /* When gas creates relocations against local labels, it creates its
3068 own symbol for the section, but does put the symbol into the
3069 symbol chain, so udata is 0. When the linker is generating
3070 relocatable output, this section symbol may be for one of the
3071 input sections rather than the output section. */
3072 if (asym_ptr->udata.i == 0
3073 && (flags & BSF_SECTION_SYM)
3074 && asym_ptr->section)
3075 {
3076 int indx;
3077
3078 if (asym_ptr->section->output_section != NULL)
3079 indx = asym_ptr->section->output_section->index;
3080 else
3081 indx = asym_ptr->section->index;
3082 if (elf_section_syms (abfd)[indx])
3083 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
3084 }
3085
3086 idx = asym_ptr->udata.i;
cb84f028
ILT		 3087
3088 if (idx == 0)
3089 {
3090 /* This case can occur when using --strip-symbol on a symbol
3091 which is used in a relocation entry. */
3092 (*_bfd_error_handler)
3093 ("%s: symbol `%s' required but not present",
3094 bfd_get_filename (abfd), bfd_asymbol_name (asym_ptr));
3095 bfd_set_error (bfd_error_no_symbols);
3096 return -1;
3097 }
ede4eed4
KR		 3098
3099#if DEBUG & 4
3100 {
3101 fprintf (stderr,
3102 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
cb84f028
ILT		 3103 (long) asym_ptr, asym_ptr->name, idx, flags,
3104 elf_symbol_flags (flags));
ede4eed4
KR		 3105 fflush (stderr);
3106 }
3107#endif
3108
3109 return idx;
3110}
3111
3dbf33ee
ILT		 3112/* Copy private BFD data. This copies any program header information. */
3113
3114static boolean
3115copy_private_bfd_data (ibfd, obfd)
3116 bfd *ibfd;
3117 bfd *obfd;
3118{
6933148a 3119 Elf_Internal_Ehdr *iehdr;
3dbf33ee
ILT		 3120 struct elf_segment_map *mfirst;
3121 struct elf_segment_map **pm;
3122 Elf_Internal_Phdr *p;
3123 unsigned int i, c;
3124
3125 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3126 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3127 return true;
3128
3129 if (elf_tdata (ibfd)->phdr == NULL)
3130 return true;
3131
6933148a
ILT		 3132 iehdr = elf_elfheader (ibfd);
3133
3dbf33ee
ILT		 3134 mfirst = NULL;
3135 pm = &mfirst;
3136
3137 c = elf_elfheader (ibfd)->e_phnum;
3138 for (i = 0, p = elf_tdata (ibfd)->phdr; i < c; i++, p++)
3139 {
3dbf33ee 3140 unsigned int csecs;
6933148a
ILT		 3141 asection *s;
3142 struct elf_segment_map *m;
3143 unsigned int isec;
3dbf33ee
ILT		 3144
3145 csecs = 0;
3dbf33ee 3146
6933148a
ILT		 3147 /* The complicated case when p_vaddr is 0 is to handle the
3148 Solaris linker, which generates a PT_INTERP section with
3149 p_vaddr and p_memsz set to 0. */
3150 for (s = ibfd->sections; s != NULL; s = s->next)
3151 if (((s->vma >= p->p_vaddr
3152 && (s->vma + s->_raw_size <= p->p_vaddr + p->p_memsz
3153 || s->vma + s->_raw_size <= p->p_vaddr + p->p_filesz))
3154 || (p->p_vaddr == 0
3155 && p->p_filesz > 0
3156 && (s->flags & SEC_HAS_CONTENTS) != 0
3157 && (bfd_vma) s->filepos >= p->p_offset
3158 && ((bfd_vma) s->filepos + s->_raw_size
3159 <= p->p_offset + p->p_filesz)))
86587dd4 3160 && (s->flags & SEC_ALLOC) != 0
6933148a
ILT		 3161 && s->output_section != NULL)
3162 ++csecs;
3dbf33ee
ILT		 3163
3164 m = ((struct elf_segment_map *)
3165 bfd_alloc (obfd,
3166 (sizeof (struct elf_segment_map)
3167 + (csecs - 1) * sizeof (asection *))));
3168 if (m == NULL)
a9713b91 3169 return false;
3dbf33ee
ILT		 3170
3171 m->next = NULL;
3172 m->p_type = p->p_type;
3173 m->p_flags = p->p_flags;
3174 m->p_flags_valid = 1;
3175 m->p_paddr = p->p_paddr;
3176 m->p_paddr_valid = 1;
3177
6933148a
ILT		 3178 m->includes_filehdr = (p->p_offset == 0
3179 && p->p_filesz >= iehdr->e_ehsize);
3180
3181 m->includes_phdrs = (p->p_offset <= (bfd_vma) iehdr->e_phoff
3182 && (p->p_offset + p->p_filesz
3183 >= ((bfd_vma) iehdr->e_phoff
3184 + iehdr->e_phnum * iehdr->e_phentsize)));
3dbf33ee 3185
6933148a
ILT		 3186 isec = 0;
3187 for (s = ibfd->sections; s != NULL; s = s->next)
3188 {
3189 if (((s->vma >= p->p_vaddr
3190 && (s->vma + s->_raw_size <= p->p_vaddr + p->p_memsz
3191 || s->vma + s->_raw_size <= p->p_vaddr + p->p_filesz))
3192 || (p->p_vaddr == 0
3193 && p->p_filesz > 0
3194 && (s->flags & SEC_HAS_CONTENTS) != 0
3195 && (bfd_vma) s->filepos >= p->p_offset
3196 && ((bfd_vma) s->filepos + s->_raw_size
3197 <= p->p_offset + p->p_filesz)))
86587dd4 3198 && (s->flags & SEC_ALLOC) != 0
6933148a 3199 && s->output_section != NULL)
3dbf33ee 3200 {
6933148a
ILT		 3201 m->sections[isec] = s->output_section;
3202 ++isec;
3dbf33ee 3203 }
3dbf33ee 3204 }
6933148a 3205 BFD_ASSERT (isec == csecs);
6933148a 3206 m->count = csecs;
3dbf33ee
ILT		 3207
3208 *pm = m;
3209 pm = &m->next;
3210 }
3211
3212 elf_tdata (obfd)->segment_map = mfirst;
3213
3214 return true;
3215}
3216
fd0198f0
ILT		 3217/* Copy private section information. This copies over the entsize
3218 field, and sometimes the info field. */
3219
3220boolean
3221_bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
3222 bfd *ibfd;
3223 asection *isec;
3224 bfd *obfd;
3225 asection *osec;
3226{
3227 Elf_Internal_Shdr *ihdr, *ohdr;
3228
3229 if (ibfd->xvec->flavour != bfd_target_elf_flavour
3230 || obfd->xvec->flavour != bfd_target_elf_flavour)
3231 return true;
3232
3dbf33ee
ILT		 3233 /* Copy over private BFD data if it has not already been copied.
3234 This must be done here, rather than in the copy_private_bfd_data
3235 entry point, because the latter is called after the section
3236 contents have been set, which means that the program headers have
3237 already been worked out. */
3238 if (elf_tdata (obfd)->segment_map == NULL
3239 && elf_tdata (ibfd)->phdr != NULL)
3240 {
3241 asection *s;
3242
3243 /* Only set up the segments when all the sections have been set
3244 up. */
3245 for (s = ibfd->sections; s != NULL; s = s->next)
3246 if (s->output_section == NULL)
3247 break;
3248 if (s == NULL)
3249 {
3250 if (! copy_private_bfd_data (ibfd, obfd))
3251 return false;
3252 }
3253 }
3254
fd0198f0
ILT		 3255 ihdr = &elf_section_data (isec)->this_hdr;
3256 ohdr = &elf_section_data (osec)->this_hdr;
3257
3258 ohdr->sh_entsize = ihdr->sh_entsize;
3259
3260 if (ihdr->sh_type == SHT_SYMTAB
d6bfcdb5
ILT		 3261 || ihdr->sh_type == SHT_DYNSYM
3262 || ihdr->sh_type == SHT_GNU_verneed
3263 || ihdr->sh_type == SHT_GNU_verdef)
fd0198f0
ILT		 3264 ohdr->sh_info = ihdr->sh_info;
3265
3266 return true;
3267}
3268
3269/* Copy private symbol information. If this symbol is in a section
3270 which we did not map into a BFD section, try to map the section
3271 index correctly. We use special macro definitions for the mapped
3272 section indices; these definitions are interpreted by the
3273 swap_out_syms function. */
3274
3275#define MAP_ONESYMTAB (SHN_LORESERVE - 1)
3276#define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
3277#define MAP_STRTAB (SHN_LORESERVE - 3)
3278#define MAP_SHSTRTAB (SHN_LORESERVE - 4)
3279
3280boolean
3281_bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg)
3282 bfd *ibfd;
3283 asymbol *isymarg;
3284 bfd *obfd;
3285 asymbol *osymarg;
3286{
3287 elf_symbol_type *isym, *osym;
3288
efc2b064
JL		 3289 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3290 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3291 return true;
3292
fd0198f0
ILT		 3293 isym = elf_symbol_from (ibfd, isymarg);
3294 osym = elf_symbol_from (obfd, osymarg);
3295
3296 if (isym != NULL
3297 && osym != NULL
3298 && bfd_is_abs_section (isym->symbol.section))
3299 {
3300 unsigned int shndx;
3301
3302 shndx = isym->internal_elf_sym.st_shndx;
3303 if (shndx == elf_onesymtab (ibfd))
3304 shndx = MAP_ONESYMTAB;
3305 else if (shndx == elf_dynsymtab (ibfd))
3306 shndx = MAP_DYNSYMTAB;
3307 else if (shndx == elf_tdata (ibfd)->strtab_section)
3308 shndx = MAP_STRTAB;
3309 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
3310 shndx = MAP_SHSTRTAB;
3311 osym->internal_elf_sym.st_shndx = shndx;
3312 }
3313
3314 return true;
3315}
3316
3317/* Swap out the symbols. */
3318
ede4eed4
KR		 3319static boolean
3320swap_out_syms (abfd, sttp)
3321 bfd *abfd;
3322 struct bfd_strtab_hash **sttp;
3323{
3324 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3325
3326 if (!elf_map_symbols (abfd))
3327 return false;
3328
3329 /* Dump out the symtabs. */
3330 {
3331 int symcount = bfd_get_symcount (abfd);
3332 asymbol **syms = bfd_get_outsymbols (abfd);
3333 struct bfd_strtab_hash *stt;
3334 Elf_Internal_Shdr *symtab_hdr;
3335 Elf_Internal_Shdr *symstrtab_hdr;
3336 char *outbound_syms;
3337 int idx;
3338
3339 stt = _bfd_elf_stringtab_init ();
3340 if (stt == NULL)
3341 return false;
3342
3343 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3344 symtab_hdr->sh_type = SHT_SYMTAB;
3345 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
3346 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
3347 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
3348 symtab_hdr->sh_addralign = bed->s->file_align;
3349
3350 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
3351 symstrtab_hdr->sh_type = SHT_STRTAB;
3352
3353 outbound_syms = bfd_alloc (abfd,
3354 (1 + symcount) * bed->s->sizeof_sym);
3355 if (outbound_syms == NULL)
a9713b91 3356 return false;
ede4eed4
KR		 3357 symtab_hdr->contents = (PTR) outbound_syms;
3358
3359 /* now generate the data (for "contents") */
3360 {
3361 /* Fill in zeroth symbol and swap it out. */
3362 Elf_Internal_Sym sym;
3363 sym.st_name = 0;
3364 sym.st_value = 0;
3365 sym.st_size = 0;
3366 sym.st_info = 0;
3367 sym.st_other = 0;
3368 sym.st_shndx = SHN_UNDEF;
cf9fb9f2 3369 bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
ede4eed4
KR		 3370 outbound_syms += bed->s->sizeof_sym;
3371 }
3372 for (idx = 0; idx < symcount; idx++)
3373 {
3374 Elf_Internal_Sym sym;
3375 bfd_vma value = syms[idx]->value;
3376 elf_symbol_type *type_ptr;
3377 flagword flags = syms[idx]->flags;
052b35d2 3378 int type;
ede4eed4
KR		 3379
3380 if (flags & BSF_SECTION_SYM)
3381 /* Section symbols have no names. */
3382 sym.st_name = 0;
3383 else
3384 {
3385 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
3386 syms[idx]->name,
3387 true, false);
3388 if (sym.st_name == (unsigned long) -1)
3389 return false;
3390 }
3391
3392 type_ptr = elf_symbol_from (abfd, syms[idx]);
3393
3394 if (bfd_is_com_section (syms[idx]->section))
3395 {
3396 /* ELF common symbols put the alignment into the `value' field,
3397 and the size into the `size' field. This is backwards from
3398 how BFD handles it, so reverse it here. */
3399 sym.st_size = value;
3400 if (type_ptr == NULL
3401 || type_ptr->internal_elf_sym.st_value == 0)
3402 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
3403 else
3404 sym.st_value = type_ptr->internal_elf_sym.st_value;
3405 sym.st_shndx = _bfd_elf_section_from_bfd_section (abfd,
3406 syms[idx]->section);
3407 }
3408 else
3409 {
3410 asection *sec = syms[idx]->section;
3411 int shndx;
3412
3413 if (sec->output_section)
3414 {
3415 value += sec->output_offset;
3416 sec = sec->output_section;
3417 }
3418 value += sec->vma;
3419 sym.st_value = value;
3420 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
fd0198f0
ILT		 3421
3422 if (bfd_is_abs_section (sec)
3423 && type_ptr != NULL
3424 && type_ptr->internal_elf_sym.st_shndx != 0)
ede4eed4 3425 {
fd0198f0
ILT		 3426 /* This symbol is in a real ELF section which we did
3427 not create as a BFD section. Undo the mapping done
3428 by copy_private_symbol_data. */
3429 shndx = type_ptr->internal_elf_sym.st_shndx;
3430 switch (shndx)
3431 {
3432 case MAP_ONESYMTAB:
3433 shndx = elf_onesymtab (abfd);
3434 break;
3435 case MAP_DYNSYMTAB:
3436 shndx = elf_dynsymtab (abfd);
3437 break;
3438 case MAP_STRTAB:
3439 shndx = elf_tdata (abfd)->strtab_section;
3440 break;
3441 case MAP_SHSTRTAB:
3442 shndx = elf_tdata (abfd)->shstrtab_section;
3443 break;
3444 default:
3445 break;
3446 }
3447 }
3448 else
3449 {
3450 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3451
3452 if (shndx == -1)
3453 {
3454 asection *sec2;
3455
3456 /* Writing this would be a hell of a lot easier if
3457 we had some decent documentation on bfd, and
3458 knew what to expect of the library, and what to
3459 demand of applications. For example, it
3460 appears that `objcopy' might not set the
3461 section of a symbol to be a section that is
3462 actually in the output file. */
3463 sec2 = bfd_get_section_by_name (abfd, sec->name);
3464 BFD_ASSERT (sec2 != 0);
3465 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
3466 BFD_ASSERT (shndx != -1);
3467 }
ede4eed4 3468 }
fd0198f0
ILT		 3469
3470 sym.st_shndx = shndx;
ede4eed4
KR		 3471 }
3472
052b35d2
ILT		 3473 if ((flags & BSF_FUNCTION) != 0)
3474 type = STT_FUNC;
3475 else if ((flags & BSF_OBJECT) != 0)
3476 type = STT_OBJECT;
3477 else
3478 type = STT_NOTYPE;
3479
ede4eed4 3480 if (bfd_is_com_section (syms[idx]->section))
052b35d2 3481 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
ede4eed4
KR		 3482 else if (bfd_is_und_section (syms[idx]->section))
3483 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
3484 ? STB_WEAK
3485 : STB_GLOBAL),
052b35d2 3486 type);
ede4eed4
KR		 3487 else if (flags & BSF_SECTION_SYM)
3488 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
3489 else if (flags & BSF_FILE)
3490 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
3491 else
3492 {
3493 int bind = STB_LOCAL;
ede4eed4
KR		 3494
3495 if (flags & BSF_LOCAL)
3496 bind = STB_LOCAL;
3497 else if (flags & BSF_WEAK)
3498 bind = STB_WEAK;
3499 else if (flags & BSF_GLOBAL)
3500 bind = STB_GLOBAL;
3501
ede4eed4
KR		 3502 sym.st_info = ELF_ST_INFO (bind, type);
3503 }
3504
80be821d
ILT		 3505 if (type_ptr != NULL)
3506 sym.st_other = type_ptr->internal_elf_sym.st_other;
3507 else
3508 sym.st_other = 0;
3509
cf9fb9f2 3510 bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
ede4eed4
KR		 3511 outbound_syms += bed->s->sizeof_sym;
3512 }
3513
3514 *sttp = stt;
3515 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
3516 symstrtab_hdr->sh_type = SHT_STRTAB;
3517
3518 symstrtab_hdr->sh_flags = 0;
3519 symstrtab_hdr->sh_addr = 0;
3520 symstrtab_hdr->sh_entsize = 0;
3521 symstrtab_hdr->sh_link = 0;
3522 symstrtab_hdr->sh_info = 0;
3523 symstrtab_hdr->sh_addralign = 1;
3524 }
3525
3526 return true;
3527}
3528
3529/* Return the number of bytes required to hold the symtab vector.
3530
3531 Note that we base it on the count plus 1, since we will null terminate
3532 the vector allocated based on this size. However, the ELF symbol table
3533 always has a dummy entry as symbol #0, so it ends up even. */
3534
3535long
3536_bfd_elf_get_symtab_upper_bound (abfd)
3537 bfd *abfd;
3538{
3539 long symcount;
3540 long symtab_size;
3541 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
3542
3543 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
3544 symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
3545
3546 return symtab_size;
3547}
3548
3549long
3550_bfd_elf_get_dynamic_symtab_upper_bound (abfd)
3551 bfd *abfd;
3552{
3553 long symcount;
3554 long symtab_size;
3555 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
3556
3557 if (elf_dynsymtab (abfd) == 0)
3558 {
3559 bfd_set_error (bfd_error_invalid_operation);
3560 return -1;
3561 }
3562
3563 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
3564 symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
3565
3566 return symtab_size;
3567}
3568
3569long
3570_bfd_elf_get_reloc_upper_bound (abfd, asect)
3571 bfd *abfd;
3572 sec_ptr asect;
3573{
3574 return (asect->reloc_count + 1) * sizeof (arelent *);
3575}
3576
3577/* Canonicalize the relocs. */
3578
3579long
3580_bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols)
3581 bfd *abfd;
3582 sec_ptr section;
3583 arelent **relptr;
3584 asymbol **symbols;
3585{
3586 arelent *tblptr;
3587 unsigned int i;
3588
e35765a9
ILT		 3589 if (! get_elf_backend_data (abfd)->s->slurp_reloc_table (abfd,
3590 section,
3591 symbols,
3592 false))
ede4eed4
KR		 3593 return -1;
3594
3595 tblptr = section->relocation;
3596 for (i = 0; i < section->reloc_count; i++)
3597 *relptr++ = tblptr++;
3598
3599 *relptr = NULL;
3600
3601 return section->reloc_count;
3602}
3603
3604long
3605_bfd_elf_get_symtab (abfd, alocation)
3606 bfd *abfd;
3607 asymbol **alocation;
3608{
3609 long symcount = get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, false);
3610
3611 if (symcount >= 0)
3612 bfd_get_symcount (abfd) = symcount;
3613 return symcount;
3614}
3615
3616long
3617_bfd_elf_canonicalize_dynamic_symtab (abfd, alocation)
3618 bfd *abfd;
3619 asymbol **alocation;
3620{
3621 return get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, true);
3622}
3623
e35765a9
ILT		 3624/* Return the size required for the dynamic reloc entries. Any
3625 section that was actually installed in the BFD, and has type
3626 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
3627 considered to be a dynamic reloc section. */
3628
3629long
3630_bfd_elf_get_dynamic_reloc_upper_bound (abfd)
3631 bfd *abfd;
3632{
3633 long ret;
3634 asection *s;
3635
3636 if (elf_dynsymtab (abfd) == 0)
3637 {
3638 bfd_set_error (bfd_error_invalid_operation);
3639 return -1;
3640 }
3641
3642 ret = sizeof (arelent *);
3643 for (s = abfd->sections; s != NULL; s = s->next)
3644 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
3645 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
3646 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
3647 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
3648 * sizeof (arelent *));
3649
3650 return ret;
3651}
3652
3653/* Canonicalize the dynamic relocation entries. Note that we return
3654 the dynamic relocations as a single block, although they are
3655 actually associated with particular sections; the interface, which
3656 was designed for SunOS style shared libraries, expects that there
3657 is only one set of dynamic relocs. Any section that was actually
3658 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
3659 the dynamic symbol table, is considered to be a dynamic reloc
3660 section. */
3661
3662long
3663_bfd_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
3664 bfd *abfd;
3665 arelent **storage;
3666 asymbol **syms;
3667{
3668 boolean (*slurp_relocs) PARAMS ((bfd *, asection *, asymbol **, boolean));
3669 asection *s;
3670 long ret;
3671
3672 if (elf_dynsymtab (abfd) == 0)
3673 {
3674 bfd_set_error (bfd_error_invalid_operation);
3675 return -1;
3676 }
3677
3678 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3679 ret = 0;
3680 for (s = abfd->sections; s != NULL; s = s->next)
3681 {
3682 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
3683 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
3684 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
3685 {
3686 arelent *p;
3687 long count, i;
3688
3689 if (! (*slurp_relocs) (abfd, s, syms, true))
3690 return -1;
3691 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
3692 p = s->relocation;
3693 for (i = 0; i < count; i++)
3694 *storage++ = p++;
3695 ret += count;
3696 }
3697 }
3698
3699 *storage = NULL;
3700
3701 return ret;
3702}
a66a61a0
ILT		 3703\f
3704/* Read in the version information. */
3705
3706boolean
3707_bfd_elf_slurp_version_tables (abfd)
3708 bfd *abfd;
3709{
3710 bfd_byte *contents = NULL;
3711
3712 if (elf_dynverdef (abfd) != 0)
3713 {
3714 Elf_Internal_Shdr *hdr;
3715 Elf_External_Verdef *everdef;
3716 Elf_Internal_Verdef *iverdef;
3717 unsigned int i;
3718
3719 hdr = &elf_tdata (abfd)->dynverdef_hdr;
3720
3721 elf_tdata (abfd)->verdef =
3722 ((Elf_Internal_Verdef *)
3723 bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verdef)));
3724 if (elf_tdata (abfd)->verdef == NULL)
3725 goto error_return;
3726
3727 elf_tdata (abfd)->cverdefs = hdr->sh_info;
e35765a9 3728
a66a61a0
ILT		 3729 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
3730 if (contents == NULL)
3731 goto error_return;
3732 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3733 || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size)
3734 goto error_return;
3735
3736 everdef = (Elf_External_Verdef *) contents;
3737 iverdef = elf_tdata (abfd)->verdef;
3738 for (i = 0; i < hdr->sh_info; i++, iverdef++)
3739 {
3740 Elf_External_Verdaux *everdaux;
3741 Elf_Internal_Verdaux *iverdaux;
3742 unsigned int j;
3743
3744 _bfd_elf_swap_verdef_in (abfd, everdef, iverdef);
3745
3746 iverdef->vd_bfd = abfd;
3747
3748 iverdef->vd_auxptr = ((Elf_Internal_Verdaux *)
3749 bfd_alloc (abfd,
3750 (iverdef->vd_cnt
3751 * sizeof (Elf_Internal_Verdaux))));
3752 if (iverdef->vd_auxptr == NULL)
3753 goto error_return;
3754
3755 everdaux = ((Elf_External_Verdaux *)
3756 ((bfd_byte *) everdef + iverdef->vd_aux));
3757 iverdaux = iverdef->vd_auxptr;
3758 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
3759 {
3760 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
3761
3762 iverdaux->vda_nodename =
3763 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
3764 iverdaux->vda_name);
3765 if (iverdaux->vda_nodename == NULL)
3766 goto error_return;
3767
3768 if (j + 1 < iverdef->vd_cnt)
3769 iverdaux->vda_nextptr = iverdaux + 1;
3770 else
3771 iverdaux->vda_nextptr = NULL;
3772
3773 everdaux = ((Elf_External_Verdaux *)
3774 ((bfd_byte *) everdaux + iverdaux->vda_next));
3775 }
3776
3777 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
3778
3779 if (i + 1 < hdr->sh_info)
3780 iverdef->vd_nextdef = iverdef + 1;
3781 else
3782 iverdef->vd_nextdef = NULL;
3783
3784 everdef = ((Elf_External_Verdef *)
3785 ((bfd_byte *) everdef + iverdef->vd_next));
3786 }
3787
3788 free (contents);
3789 contents = NULL;
3790 }
3791
3792 if (elf_dynverref (abfd) != 0)
3793 {
3794 Elf_Internal_Shdr *hdr;
3795 Elf_External_Verneed *everneed;
3796 Elf_Internal_Verneed *iverneed;
3797 unsigned int i;
3798
3799 hdr = &elf_tdata (abfd)->dynverref_hdr;
3800
3801 elf_tdata (abfd)->verref =
3802 ((Elf_Internal_Verneed *)
3803 bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verneed)));
3804 if (elf_tdata (abfd)->verref == NULL)
3805 goto error_return;
3806
3807 elf_tdata (abfd)->cverrefs = hdr->sh_info;
3808
3809 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
3810 if (contents == NULL)
3811 goto error_return;
3812 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3813 || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size)
3814 goto error_return;
3815
3816 everneed = (Elf_External_Verneed *) contents;
3817 iverneed = elf_tdata (abfd)->verref;
3818 for (i = 0; i < hdr->sh_info; i++, iverneed++)
3819 {
3820 Elf_External_Vernaux *evernaux;
3821 Elf_Internal_Vernaux *ivernaux;
3822 unsigned int j;
3823
3824 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
3825
3826 iverneed->vn_bfd = abfd;
3827
3828 iverneed->vn_filename =
3829 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
3830 iverneed->vn_file);
3831 if (iverneed->vn_filename == NULL)
3832 goto error_return;
3833
3834 iverneed->vn_auxptr =
3835 ((Elf_Internal_Vernaux *)
3836 bfd_alloc (abfd,
3837 iverneed->vn_cnt * sizeof (Elf_Internal_Vernaux)));
3838
3839 evernaux = ((Elf_External_Vernaux *)
3840 ((bfd_byte *) everneed + iverneed->vn_aux));
3841 ivernaux = iverneed->vn_auxptr;
3842 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
3843 {
3844 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
3845
3846 ivernaux->vna_nodename =
3847 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
3848 ivernaux->vna_name);
3849 if (ivernaux->vna_nodename == NULL)
3850 goto error_return;
3851
3852 if (j + 1 < iverneed->vn_cnt)
3853 ivernaux->vna_nextptr = ivernaux + 1;
3854 else
3855 ivernaux->vna_nextptr = NULL;
3856
3857 evernaux = ((Elf_External_Vernaux *)
3858 ((bfd_byte *) evernaux + ivernaux->vna_next));
3859 }
3860
3861 if (i + 1 < hdr->sh_info)
3862 iverneed->vn_nextref = iverneed + 1;
3863 else
3864 iverneed->vn_nextref = NULL;
3865
3866 everneed = ((Elf_External_Verneed *)
3867 ((bfd_byte *) everneed + iverneed->vn_next));
3868 }
3869
3870 free (contents);
3871 contents = NULL;
3872 }
3873
3874 return true;
3875
3876 error_return:
3877 if (contents == NULL)
3878 free (contents);
3879 return false;
3880}
3881\f
ede4eed4
KR		 3882asymbol *
3883_bfd_elf_make_empty_symbol (abfd)
3884 bfd *abfd;
3885{
3886 elf_symbol_type *newsym;
3887
3888 newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type));
3889 if (!newsym)
a9713b91 3890 return NULL;
ede4eed4
KR		 3891 else
3892 {
3893 newsym->symbol.the_bfd = abfd;
3894 return &newsym->symbol;
3895 }
3896}
3897
3898void
3899_bfd_elf_get_symbol_info (ignore_abfd, symbol, ret)
3900 bfd *ignore_abfd;
3901 asymbol *symbol;
3902 symbol_info *ret;
3903{
3904 bfd_symbol_info (symbol, ret);
3905}
3906
d6bfcdb5
ILT		 3907/* Return whether a symbol name implies a local symbol. Most targets
3908 use this function for the is_local_label_name entry point, but some
3909 override it. */
a66a61a0
ILT		 3910
3911boolean
3912_bfd_elf_is_local_label_name (abfd, name)
3913 bfd *abfd;
3914 const char *name;
3915{
d6bfcdb5
ILT		 3916 /* Normal local symbols start with ``.L''. */
3917 if (name[0] == '.' && name[1] == 'L')
3918 return true;
3919
3920 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
3921 DWARF debugging symbols starting with ``..''. */
3922 if (name[0] == '.' && name[1] == '.')
3923 return true;
3924
3925 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
3926 emitting DWARF debugging output. I suspect this is actually a
3927 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
3928 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
3929 underscore to be emitted on some ELF targets). For ease of use,
3930 we treat such symbols as local. */
3931 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
3932 return true;
3933
3934 return false;
a66a61a0
ILT		 3935}
3936
ede4eed4
KR		 3937alent *
3938_bfd_elf_get_lineno (ignore_abfd, symbol)
3939 bfd *ignore_abfd;
3940 asymbol *symbol;
3941{
8cd2f4fe 3942 abort ();
ede4eed4
KR		 3943 return NULL;
3944}
3945
3946boolean
3947_bfd_elf_set_arch_mach (abfd, arch, machine)
3948 bfd *abfd;
3949 enum bfd_architecture arch;
3950 unsigned long machine;
3951{
3952 /* If this isn't the right architecture for this backend, and this
3953 isn't the generic backend, fail. */
3954 if (arch != get_elf_backend_data (abfd)->arch
3955 && arch != bfd_arch_unknown
3956 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
3957 return false;
3958
3959 return bfd_default_set_arch_mach (abfd, arch, machine);
3960}
3961
6f904fce
ILT		 3962/* Find the nearest line to a particular section and offset, for error
3963 reporting. */
3964
ede4eed4
KR		 3965boolean
3966_bfd_elf_find_nearest_line (abfd,
6f904fce
ILT		 3967 section,
3968 symbols,
3969 offset,
3970 filename_ptr,
3971 functionname_ptr,
3972 line_ptr)
ede4eed4
KR		 3973 bfd *abfd;
3974 asection *section;
3975 asymbol **symbols;
3976 bfd_vma offset;
3977 CONST char **filename_ptr;
3978 CONST char **functionname_ptr;
3979 unsigned int *line_ptr;
3980{
86aac8ea 3981 boolean found;
6f904fce
ILT		 3982 const char *filename;
3983 asymbol *func;
86aac8ea 3984 bfd_vma low_func;
6f904fce
ILT		 3985 asymbol **p;
3986
86aac8ea
ILT		 3987 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
3988 &found, filename_ptr,
3989 functionname_ptr, line_ptr,
3990 &elf_tdata (abfd)->line_info))
3991 return false;
3992 if (found)
3993 return true;
3994
6f904fce
ILT		 3995 if (symbols == NULL)
3996 return false;
3997
3998 filename = NULL;
3999 func = NULL;
86aac8ea 4000 low_func = 0;
6f904fce
ILT		 4001
4002 for (p = symbols; *p != NULL; p++)
4003 {
4004 elf_symbol_type *q;
4005
4006 q = (elf_symbol_type *) *p;
4007
4008 if (bfd_get_section (&q->symbol) != section)
4009 continue;
4010
4011 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
4012 {
4013 default:
4014 break;
4015 case STT_FILE:
4016 filename = bfd_asymbol_name (&q->symbol);
4017 break;
4018 case STT_FUNC:
86aac8ea
ILT		 4019 if (q->symbol.section == section
4020 && q->symbol.value >= low_func
4021 && q->symbol.value <= offset)
4022 {
4023 func = (asymbol *) q;
4024 low_func = q->symbol.value;
4025 }
6f904fce
ILT		 4026 break;
4027 }
4028 }
4029
4030 if (func == NULL)
4031 return false;
4032
4033 *filename_ptr = filename;
4034 *functionname_ptr = bfd_asymbol_name (func);
4035 *line_ptr = 0;
4036 return true;
ede4eed4
KR		 4037}
4038
4039int
4040_bfd_elf_sizeof_headers (abfd, reloc)
4041 bfd *abfd;
4042 boolean reloc;
4043{
4044 int ret;
4045
4046 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
4047 if (! reloc)
fd0198f0 4048 ret += get_program_header_size (abfd);
ede4eed4
KR		 4049 return ret;
4050}
4051
4052boolean
4053_bfd_elf_set_section_contents (abfd, section, location, offset, count)
4054 bfd *abfd;
4055 sec_ptr section;
4056 PTR location;
4057 file_ptr offset;
4058 bfd_size_type count;
4059{
4060 Elf_Internal_Shdr *hdr;
4061
4062 if (! abfd->output_has_begun
4063 && ! _bfd_elf_compute_section_file_positions (abfd,
4064 (struct bfd_link_info *) NULL))
4065 return false;
4066
4067 hdr = &elf_section_data (section)->this_hdr;
4068
4069 if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1)
4070 return false;
4071 if (bfd_write (location, 1, count, abfd) != count)
4072 return false;
4073
4074 return true;
4075}
4076
4077void
4078_bfd_elf_no_info_to_howto (abfd, cache_ptr, dst)
4079 bfd *abfd;
4080 arelent *cache_ptr;
4081 Elf_Internal_Rela *dst;
4082{
8cd2f4fe 4083 abort ();
ede4eed4
KR		 4084}
4085
4086#if 0
4087void
4088_bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
4089 bfd *abfd;
4090 arelent *cache_ptr;
4091 Elf_Internal_Rel *dst;
4092{
8cd2f4fe 4093 abort ();
ede4eed4
KR		 4094}
4095#endif
7fc6a16a
ILT		 4096
4097/* Try to convert a non-ELF reloc into an ELF one. */
4098
4099boolean
4100_bfd_elf_validate_reloc (abfd, areloc)
4101 bfd *abfd;
4102 arelent *areloc;
4103{
4104 /* Check whether we really have an ELF howto. */
4105
4106 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
4107 {
4108 bfd_reloc_code_real_type code;
4109 reloc_howto_type *howto;
4110
4111 /* Alien reloc: Try to determine its type to replace it with an
4112 equivalent ELF reloc. */
4113
4114 if (areloc->howto->pc_relative)
4115 {
4116 switch (areloc->howto->bitsize)
4117 {
4118 case 8:
4119 code = BFD_RELOC_8_PCREL;
4120 break;
4121 case 12:
4122 code = BFD_RELOC_12_PCREL;
4123 break;
4124 case 16:
4125 code = BFD_RELOC_16_PCREL;
4126 break;
4127 case 24:
4128 code = BFD_RELOC_24_PCREL;
4129 break;
4130 case 32:
4131 code = BFD_RELOC_32_PCREL;
4132 break;
4133 case 64:
4134 code = BFD_RELOC_64_PCREL;
4135 break;
4136 default:
4137 goto fail;
4138 }
4139
4140 howto = bfd_reloc_type_lookup (abfd, code);
4141
4142 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
4143 {
4144 if (howto->pcrel_offset)
4145 areloc->addend += areloc->address;
4146 else
4147 areloc->addend -= areloc->address; /* addend is unsigned!! */
4148 }
4149 }
4150 else
4151 {
4152 switch (areloc->howto->bitsize)
4153 {
4154 case 8:
4155 code = BFD_RELOC_8;
4156 break;
4157 case 14:
4158 code = BFD_RELOC_14;
4159 break;
4160 case 16:
4161 code = BFD_RELOC_16;
4162 break;
4163 case 26:
4164 code = BFD_RELOC_26;
4165 break;
4166 case 32:
4167 code = BFD_RELOC_32;
4168 break;
4169 case 64:
4170 code = BFD_RELOC_64;
4171 break;
4172 default:
4173 goto fail;
4174 }
4175
4176 howto = bfd_reloc_type_lookup (abfd, code);
4177 }
4178
4179 if (howto)
4180 areloc->howto = howto;
4181 else
4182 goto fail;
4183 }
4184
4185 return true;
4186
4187 fail:
4188 (*_bfd_error_handler)
4189 ("%s: unsupported relocation type %s",
4190 bfd_get_filename (abfd), areloc->howto->name);
4191 bfd_set_error (bfd_error_bad_value);
4192 return false;
4193}
Empty description
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