1 /* ELF executable support for BFD.
2 Copyright 1993 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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).
29 Documentation of the internals of the support code still needs
30 to be written. The code is changing quickly enough that we
41 static file_ptr map_program_segments PARAMS ((bfd *, file_ptr,
45 static boolean assign_file_positions_except_relocs PARAMS ((bfd *, boolean));
46 static boolean prep_headers PARAMS ((bfd *));
47 static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **));
49 /* Standard ELF hash function. Do not change this function; you will
50 cause invalid hash tables to be generated. (Well, you would if this
51 were being used yet.) */
54 CONST unsigned char *name;
60 while ((ch = *name++) != '\0')
63 if ((g = (h & 0xf0000000)) != 0)
72 /* Read a specified number of bytes at a specified offset in an ELF
73 file, into a newly allocated buffer, and return a pointer to the
77 elf_read (abfd, offset, size)
84 if ((buf = bfd_alloc (abfd, size)) == NULL)
86 bfd_set_error (bfd_error_no_memory);
89 if (bfd_seek (abfd, offset, SEEK_SET) == -1)
91 if (bfd_read ((PTR) buf, size, 1, abfd) != size)
93 if (bfd_get_error () != bfd_error_system_call)
94 bfd_set_error (bfd_error_file_truncated);
104 /* this just does initialization */
105 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
106 elf_tdata (abfd) = (struct elf_obj_tdata *)
107 bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
108 if (elf_tdata (abfd) == 0)
110 bfd_set_error (bfd_error_no_memory);
113 /* since everything is done at close time, do we need any
120 bfd_elf_get_str_section (abfd, shindex)
122 unsigned int shindex;
124 Elf_Internal_Shdr **i_shdrp;
125 char *shstrtab = NULL;
127 unsigned int shstrtabsize;
129 i_shdrp = elf_elfsections (abfd);
130 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
133 shstrtab = (char *) i_shdrp[shindex]->contents;
134 if (shstrtab == NULL)
136 /* No cached one, attempt to read, and cache what we read. */
137 offset = i_shdrp[shindex]->sh_offset;
138 shstrtabsize = i_shdrp[shindex]->sh_size;
139 shstrtab = elf_read (abfd, offset, shstrtabsize);
140 i_shdrp[shindex]->contents = (PTR) shstrtab;
146 bfd_elf_string_from_elf_section (abfd, shindex, strindex)
148 unsigned int shindex;
149 unsigned int strindex;
151 Elf_Internal_Shdr *hdr;
156 hdr = elf_elfsections (abfd)[shindex];
158 if (hdr->contents == NULL
159 && bfd_elf_get_str_section (abfd, shindex) == NULL)
162 return ((char *) hdr->contents) + strindex;
165 /* Make a BFD section from an ELF section. We store a pointer to the
166 BFD section in the bfd_section field of the header. */
169 _bfd_elf_make_section_from_shdr (abfd, hdr, name)
171 Elf_Internal_Shdr *hdr;
177 if (hdr->bfd_section != NULL)
179 BFD_ASSERT (strcmp (name,
180 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
184 newsect = bfd_make_section_anyway (abfd, name);
188 newsect->filepos = hdr->sh_offset;
190 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
191 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
192 || ! bfd_set_section_alignment (abfd, newsect,
193 bfd_log2 (hdr->sh_addralign)))
196 flags = SEC_NO_FLAGS;
197 if (hdr->sh_type != SHT_NOBITS)
198 flags |= SEC_HAS_CONTENTS;
199 if ((hdr->sh_flags & SHF_ALLOC) != 0)
202 if (hdr->sh_type != SHT_NOBITS)
205 if ((hdr->sh_flags & SHF_WRITE) == 0)
206 flags |= SEC_READONLY;
207 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
209 else if ((flags & SEC_LOAD) != 0)
212 /* The debugging sections appear to be recognized only by name, not
214 if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0
215 || strncmp (name, ".line", sizeof ".line" - 1) == 0
216 || strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
217 flags |= SEC_DEBUGGING;
219 if (! bfd_set_section_flags (abfd, newsect, flags))
222 hdr->bfd_section = newsect;
223 elf_section_data (newsect)->this_hdr = *hdr;
233 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
236 Helper functions for GDB to locate the string tables.
237 Since BFD hides string tables from callers, GDB needs to use an
238 internal hook to find them. Sun's .stabstr, in particular,
239 isn't even pointed to by the .stab section, so ordinary
240 mechanisms wouldn't work to find it, even if we had some.
243 struct elf_internal_shdr *
244 bfd_elf_find_section (abfd, name)
248 Elf_Internal_Shdr **i_shdrp;
253 i_shdrp = elf_elfsections (abfd);
256 shstrtab = bfd_elf_get_str_section (abfd, elf_elfheader (abfd)->e_shstrndx);
257 if (shstrtab != NULL)
259 max = elf_elfheader (abfd)->e_shnum;
260 for (i = 1; i < max; i++)
261 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
268 const char *const bfd_elf_section_type_names[] = {
269 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
270 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
271 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
274 /* ELF relocs are against symbols. If we are producing relocateable
275 output, and the reloc is against an external symbol, and nothing
276 has given us any additional addend, the resulting reloc will also
277 be against the same symbol. In such a case, we don't want to
278 change anything about the way the reloc is handled, since it will
279 all be done at final link time. Rather than put special case code
280 into bfd_perform_relocation, all the reloc types use this howto
281 function. It just short circuits the reloc if producing
282 relocateable output against an external symbol. */
285 bfd_reloc_status_type
286 bfd_elf_generic_reloc (abfd,
294 arelent *reloc_entry;
297 asection *input_section;
299 char **error_message;
301 if (output_bfd != (bfd *) NULL
302 && (symbol->flags & BSF_SECTION_SYM) == 0
303 && (! reloc_entry->howto->partial_inplace
304 || reloc_entry->addend == 0))
306 reloc_entry->address += input_section->output_offset;
310 return bfd_reloc_continue;
313 /* Display ELF-specific fields of a symbol. */
315 bfd_elf_print_symbol (ignore_abfd, filep, symbol, how)
319 bfd_print_symbol_type how;
321 FILE *file = (FILE *) filep;
324 case bfd_print_symbol_name:
325 fprintf (file, "%s", symbol->name);
327 case bfd_print_symbol_more:
328 fprintf (file, "elf ");
329 fprintf_vma (file, symbol->value);
330 fprintf (file, " %lx", (long) symbol->flags);
332 case bfd_print_symbol_all:
334 CONST char *section_name;
335 section_name = symbol->section ? symbol->section->name : "(*none*)";
336 bfd_print_symbol_vandf ((PTR) file, symbol);
337 fprintf (file, " %s\t", section_name);
338 /* Print the "other" value for a symbol. For common symbols,
339 we've already printed the size; now print the alignment.
340 For other symbols, we have no specified alignment, and
341 we've printed the address; now print the size. */
343 (bfd_is_com_section (symbol->section)
344 ? ((elf_symbol_type *) symbol)->internal_elf_sym.st_value
345 : ((elf_symbol_type *) symbol)->internal_elf_sym.st_size));
346 fprintf (file, " %s", symbol->name);
352 /* Create an entry in an ELF linker hash table. */
354 struct bfd_hash_entry *
355 _bfd_elf_link_hash_newfunc (entry, table, string)
356 struct bfd_hash_entry *entry;
357 struct bfd_hash_table *table;
360 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
362 /* Allocate the structure if it has not already been allocated by a
364 if (ret == (struct elf_link_hash_entry *) NULL)
365 ret = ((struct elf_link_hash_entry *)
366 bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)));
367 if (ret == (struct elf_link_hash_entry *) NULL)
369 bfd_set_error (bfd_error_no_memory);
370 return (struct bfd_hash_entry *) ret;
373 /* Call the allocation method of the superclass. */
374 ret = ((struct elf_link_hash_entry *)
375 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
377 if (ret != (struct elf_link_hash_entry *) NULL)
379 /* Set local fields. */
383 ret->dynstr_index = 0;
385 ret->got_offset = (bfd_vma) -1;
386 ret->plt_offset = (bfd_vma) -1;
387 ret->type = STT_NOTYPE;
388 ret->elf_link_hash_flags = 0;
391 return (struct bfd_hash_entry *) ret;
394 /* Initialize an ELF linker hash table. */
397 _bfd_elf_link_hash_table_init (table, abfd, newfunc)
398 struct elf_link_hash_table *table;
400 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
401 struct bfd_hash_table *,
404 table->dynamic_sections_created = false;
405 table->dynobj = NULL;
406 /* The first dynamic symbol is a dummy. */
407 table->dynsymcount = 1;
408 table->dynstr = NULL;
409 table->bucketcount = 0;
410 table->needed = NULL;
411 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
414 /* Create an ELF linker hash table. */
416 struct bfd_link_hash_table *
417 _bfd_elf_link_hash_table_create (abfd)
420 struct elf_link_hash_table *ret;
422 ret = ((struct elf_link_hash_table *)
423 bfd_alloc (abfd, sizeof (struct elf_link_hash_table)));
424 if (ret == (struct elf_link_hash_table *) NULL)
426 bfd_set_error (bfd_error_no_memory);
430 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
432 bfd_release (abfd, ret);
439 /* This is a hook for the ELF emulation code in the generic linker to
440 tell the backend linker what file name to use for the DT_NEEDED
441 entry for a dynamic object. The generic linker passes name as an
442 empty string to indicate that no DT_NEEDED entry should be made. */
445 bfd_elf_set_dt_needed_name (abfd, name)
449 elf_dt_needed_name (abfd) = name;
452 /* Get the list of DT_NEEDED entries for a link. */
454 struct bfd_elf_link_needed_list *
455 bfd_elf_get_needed_list (abfd, info)
457 struct bfd_link_info *info;
459 return elf_hash_table (info)->needed;
462 /* Allocate an ELF string table--force the first byte to be zero. */
464 struct bfd_strtab_hash *
465 _bfd_elf_stringtab_init ()
467 struct bfd_strtab_hash *ret;
469 ret = _bfd_stringtab_init ();
474 loc = _bfd_stringtab_add (ret, "", true, false);
475 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
476 if (loc == (bfd_size_type) -1)
478 _bfd_stringtab_free (ret);
485 /* ELF .o/exec file reading */
487 /* Create a new bfd section from an ELF section header. */
490 bfd_section_from_shdr (abfd, shindex)
492 unsigned int shindex;
494 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
495 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
496 struct elf_backend_data *bed = get_elf_backend_data (abfd);
499 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
501 switch (hdr->sh_type)
504 /* Inactive section. Throw it away. */
507 case SHT_PROGBITS: /* Normal section with contents. */
508 case SHT_DYNAMIC: /* Dynamic linking information. */
509 case SHT_NOBITS: /* .bss section. */
510 case SHT_HASH: /* .hash section. */
511 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
513 case SHT_SYMTAB: /* A symbol table */
514 if (elf_onesymtab (abfd) == shindex)
517 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
518 BFD_ASSERT (elf_onesymtab (abfd) == 0);
519 elf_onesymtab (abfd) = shindex;
520 elf_tdata (abfd)->symtab_hdr = *hdr;
521 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_hdr;
522 abfd->flags |= HAS_SYMS;
524 /* Sometimes a shared object will map in the symbol table. If
525 SHF_ALLOC is set, and this is a shared object, then we also
526 treat this section as a BFD section. We can not base the
527 decision purely on SHF_ALLOC, because that flag is sometimes
528 set in a relocateable object file, which would confuse the
530 if ((hdr->sh_flags & SHF_ALLOC) != 0
531 && (abfd->flags & DYNAMIC) != 0
532 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
537 case SHT_DYNSYM: /* A dynamic symbol table */
538 if (elf_dynsymtab (abfd) == shindex)
541 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
542 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
543 elf_dynsymtab (abfd) = shindex;
544 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
545 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->dynsymtab_hdr;
546 abfd->flags |= HAS_SYMS;
548 /* Besides being a symbol table, we also treat this as a regular
549 section, so that objcopy can handle it. */
550 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
552 case SHT_STRTAB: /* A string table */
553 if (hdr->bfd_section != NULL)
555 if (ehdr->e_shstrndx == shindex)
557 elf_tdata (abfd)->shstrtab_hdr = *hdr;
558 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
564 for (i = 1; i < ehdr->e_shnum; i++)
566 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
567 if (hdr2->sh_link == shindex)
569 if (! bfd_section_from_shdr (abfd, i))
571 if (elf_onesymtab (abfd) == i)
573 elf_tdata (abfd)->strtab_hdr = *hdr;
574 elf_elfsections (abfd)[shindex] =
575 &elf_tdata (abfd)->strtab_hdr;
578 if (elf_dynsymtab (abfd) == i)
580 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
581 elf_elfsections (abfd)[shindex] =
582 &elf_tdata (abfd)->dynstrtab_hdr;
583 /* We also treat this as a regular section, so
584 that objcopy can handle it. */
587 #if 0 /* Not handling other string tables specially right now. */
588 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
589 /* We have a strtab for some random other section. */
590 newsect = (asection *) hdr2->bfd_section;
593 hdr->bfd_section = newsect;
594 hdr2 = &elf_section_data (newsect)->str_hdr;
596 elf_elfsections (abfd)[shindex] = hdr2;
602 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
606 /* *These* do a lot of work -- but build no sections! */
608 asection *target_sect;
609 Elf_Internal_Shdr *hdr2;
610 int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
612 /* For some incomprehensible reason Oracle distributes
613 libraries for Solaris in which some of the objects have
614 bogus sh_link fields. It would be nice if we could just
615 reject them, but, unfortunately, some people need to use
616 them. We scan through the section headers; if we find only
617 one suitable symbol table, we clobber the sh_link to point
618 to it. I hope this doesn't break anything. */
619 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
620 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
626 for (scan = 1; scan < ehdr->e_shnum; scan++)
628 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
629 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
640 hdr->sh_link = found;
643 /* Get the symbol table. */
644 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
645 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
648 /* If this reloc section does not use the main symbol table we
649 don't treat it as a reloc section. BFD can't adequately
650 represent such a section, so at least for now, we don't
651 try. We just present it as a normal section. */
652 if (hdr->sh_link != elf_onesymtab (abfd))
653 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
655 /* Don't allow REL relocations on a machine that uses RELA and
657 /* @@ Actually, the generic ABI does suggest that both might be
658 used in one file. But the four ABI Processor Supplements I
659 have access to right now all specify that only one is used on
660 each of those architectures. It's conceivable that, e.g., a
661 bunch of absolute 32-bit relocs might be more compact in REL
662 form even on a RELA machine... */
663 BFD_ASSERT (use_rela_p
664 ? (hdr->sh_type == SHT_RELA
665 && hdr->sh_entsize == bed->s->sizeof_rela)
666 : (hdr->sh_type == SHT_REL
667 && hdr->sh_entsize == bed->s->sizeof_rel));
669 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
671 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
672 if (target_sect == NULL)
675 hdr2 = &elf_section_data (target_sect)->rel_hdr;
677 elf_elfsections (abfd)[shindex] = hdr2;
678 target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize;
679 target_sect->flags |= SEC_RELOC;
680 target_sect->relocation = NULL;
681 target_sect->rel_filepos = hdr->sh_offset;
682 abfd->flags |= HAS_RELOC;
694 /* Check for any processor-specific section types. */
696 if (bed->elf_backend_section_from_shdr)
697 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
705 /* Given an ELF section number, retrieve the corresponding BFD
709 bfd_section_from_elf_index (abfd, index)
713 BFD_ASSERT (index > 0 && index < SHN_LORESERVE);
714 if (index >= elf_elfheader (abfd)->e_shnum)
716 return elf_elfsections (abfd)[index]->bfd_section;
720 _bfd_elf_new_section_hook (abfd, sec)
724 struct bfd_elf_section_data *sdata;
726 sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata));
729 bfd_set_error (bfd_error_no_memory);
732 sec->used_by_bfd = (PTR) sdata;
733 memset (sdata, 0, sizeof (*sdata));
737 /* Create a new bfd section from an ELF program header.
739 Since program segments have no names, we generate a synthetic name
740 of the form segment<NUM>, where NUM is generally the index in the
741 program header table. For segments that are split (see below) we
742 generate the names segment<NUM>a and segment<NUM>b.
744 Note that some program segments may have a file size that is different than
745 (less than) the memory size. All this means is that at execution the
746 system must allocate the amount of memory specified by the memory size,
747 but only initialize it with the first "file size" bytes read from the
748 file. This would occur for example, with program segments consisting
749 of combined data+bss.
751 To handle the above situation, this routine generates TWO bfd sections
752 for the single program segment. The first has the length specified by
753 the file size of the segment, and the second has the length specified
754 by the difference between the two sizes. In effect, the segment is split
755 into it's initialized and uninitialized parts.
760 bfd_section_from_phdr (abfd, hdr, index)
762 Elf_Internal_Phdr *hdr;
770 split = ((hdr->p_memsz > 0) &&
771 (hdr->p_filesz > 0) &&
772 (hdr->p_memsz > hdr->p_filesz));
773 sprintf (namebuf, split ? "segment%da" : "segment%d", index);
774 name = bfd_alloc (abfd, strlen (namebuf) + 1);
777 bfd_set_error (bfd_error_no_memory);
780 strcpy (name, namebuf);
781 newsect = bfd_make_section (abfd, name);
784 newsect->vma = hdr->p_vaddr;
785 newsect->lma = hdr->p_paddr;
786 newsect->_raw_size = hdr->p_filesz;
787 newsect->filepos = hdr->p_offset;
788 newsect->flags |= SEC_HAS_CONTENTS;
789 if (hdr->p_type == PT_LOAD)
791 newsect->flags |= SEC_ALLOC;
792 newsect->flags |= SEC_LOAD;
793 if (hdr->p_flags & PF_X)
795 /* FIXME: all we known is that it has execute PERMISSION,
797 newsect->flags |= SEC_CODE;
800 if (!(hdr->p_flags & PF_W))
802 newsect->flags |= SEC_READONLY;
807 sprintf (namebuf, "segment%db", index);
808 name = bfd_alloc (abfd, strlen (namebuf) + 1);
811 bfd_set_error (bfd_error_no_memory);
814 strcpy (name, namebuf);
815 newsect = bfd_make_section (abfd, name);
818 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
819 newsect->lma = hdr->p_paddr + hdr->p_filesz;
820 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
821 if (hdr->p_type == PT_LOAD)
823 newsect->flags |= SEC_ALLOC;
824 if (hdr->p_flags & PF_X)
825 newsect->flags |= SEC_CODE;
827 if (!(hdr->p_flags & PF_W))
828 newsect->flags |= SEC_READONLY;
834 /* Set up an ELF internal section header for a section. */
838 elf_fake_sections (abfd, asect, failedptrarg)
843 struct elf_backend_data *bed = get_elf_backend_data (abfd);
844 boolean *failedptr = (boolean *) failedptrarg;
845 Elf_Internal_Shdr *this_hdr;
849 /* We already failed; just get out of the bfd_map_over_sections
854 this_hdr = &elf_section_data (asect)->this_hdr;
856 this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd),
859 if (this_hdr->sh_name == (unsigned long) -1)
865 this_hdr->sh_flags = 0;
867 /* FIXME: This should really use vma, rather than lma. However,
868 that would mean that the lma information was lost, which would
869 mean that the AT keyword in linker scripts would not work.
870 Fortunately, native scripts do not use the AT keyword, so we can
871 get away with using lma here. The right way to handle this is to
872 1) read the program headers as well as the section headers, and
873 set the lma fields of the BFD sections based on the p_paddr
874 fields of the program headers, and 2) set the p_paddr fields of
875 the program headers based on the section lma fields when writing
877 if ((asect->flags & SEC_ALLOC) != 0)
878 this_hdr->sh_addr = asect->lma;
880 this_hdr->sh_addr = 0;
882 this_hdr->sh_offset = 0;
883 this_hdr->sh_size = asect->_raw_size;
884 this_hdr->sh_link = 0;
885 this_hdr->sh_info = 0;
886 this_hdr->sh_addralign = 1 << asect->alignment_power;
887 this_hdr->sh_entsize = 0;
889 this_hdr->bfd_section = asect;
890 this_hdr->contents = NULL;
892 /* FIXME: This should not be based on section names. */
893 if (strcmp (asect->name, ".dynstr") == 0)
894 this_hdr->sh_type = SHT_STRTAB;
895 else if (strcmp (asect->name, ".hash") == 0)
897 this_hdr->sh_type = SHT_HASH;
898 this_hdr->sh_entsize = bed->s->arch_size / 8;
900 else if (strcmp (asect->name, ".dynsym") == 0)
902 this_hdr->sh_type = SHT_DYNSYM;
903 this_hdr->sh_entsize = bed->s->sizeof_sym;
905 else if (strcmp (asect->name, ".dynamic") == 0)
907 this_hdr->sh_type = SHT_DYNAMIC;
908 this_hdr->sh_entsize = bed->s->sizeof_dyn;
910 else if (strncmp (asect->name, ".rela", 5) == 0
911 && get_elf_backend_data (abfd)->use_rela_p)
913 this_hdr->sh_type = SHT_RELA;
914 this_hdr->sh_entsize = bed->s->sizeof_rela;
916 else if (strncmp (asect->name, ".rel", 4) == 0
917 && ! get_elf_backend_data (abfd)->use_rela_p)
919 this_hdr->sh_type = SHT_REL;
920 this_hdr->sh_entsize = bed->s->sizeof_rel;
922 else if (strcmp (asect->name, ".note") == 0)
923 this_hdr->sh_type = SHT_NOTE;
924 else if (strncmp (asect->name, ".stab", 5) == 0
925 && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0)
926 this_hdr->sh_type = SHT_STRTAB;
927 else if ((asect->flags & SEC_ALLOC) != 0
928 && (asect->flags & SEC_LOAD) != 0)
929 this_hdr->sh_type = SHT_PROGBITS;
930 else if ((asect->flags & SEC_ALLOC) != 0
931 && ((asect->flags & SEC_LOAD) == 0))
933 BFD_ASSERT (strcmp (asect->name, ".bss") == 0
934 || strcmp (asect->name, ".sbss") == 0
935 || strcmp (asect->name, ".scommon") == 0
936 || strcmp (asect->name, "COMMON") == 0);
937 this_hdr->sh_type = SHT_NOBITS;
942 this_hdr->sh_type = SHT_PROGBITS;
945 if ((asect->flags & SEC_ALLOC) != 0)
946 this_hdr->sh_flags |= SHF_ALLOC;
947 if ((asect->flags & SEC_READONLY) == 0)
948 this_hdr->sh_flags |= SHF_WRITE;
949 if ((asect->flags & SEC_CODE) != 0)
950 this_hdr->sh_flags |= SHF_EXECINSTR;
952 /* Check for processor-specific section types. */
954 struct elf_backend_data *bed = get_elf_backend_data (abfd);
956 if (bed->elf_backend_fake_sections)
957 (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
960 /* If the section has relocs, set up a section header for the
961 SHT_REL[A] section. */
962 if ((asect->flags & SEC_RELOC) != 0)
964 Elf_Internal_Shdr *rela_hdr;
965 int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
968 rela_hdr = &elf_section_data (asect)->rel_hdr;
969 name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name));
972 bfd_set_error (bfd_error_no_memory);
976 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
978 (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name,
980 if (rela_hdr->sh_name == (unsigned int) -1)
985 rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
986 rela_hdr->sh_entsize = (use_rela_p
987 ? bed->s->sizeof_rela
988 : bed->s->sizeof_rel);
989 rela_hdr->sh_addralign = bed->s->file_align;
990 rela_hdr->sh_flags = 0;
991 rela_hdr->sh_addr = 0;
992 rela_hdr->sh_size = 0;
993 rela_hdr->sh_offset = 0;
997 /* Assign all ELF section numbers. The dummy first section is handled here
998 too. The link/info pointers for the standard section types are filled
999 in here too, while we're at it. */
1002 assign_section_numbers (abfd)
1005 struct elf_obj_tdata *t = elf_tdata (abfd);
1007 unsigned int section_number;
1008 Elf_Internal_Shdr **i_shdrp;
1009 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1013 for (sec = abfd->sections; sec; sec = sec->next)
1015 struct bfd_elf_section_data *d = elf_section_data (sec);
1017 d->this_idx = section_number++;
1018 if ((sec->flags & SEC_RELOC) == 0)
1021 d->rel_idx = section_number++;
1024 t->shstrtab_section = section_number++;
1025 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
1026 t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
1028 if (abfd->symcount > 0)
1030 t->symtab_section = section_number++;
1031 t->strtab_section = section_number++;
1034 elf_elfheader (abfd)->e_shnum = section_number;
1036 /* Set up the list of section header pointers, in agreement with the
1038 i_shdrp = ((Elf_Internal_Shdr **)
1039 bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)));
1040 if (i_shdrp == NULL)
1042 bfd_set_error (bfd_error_no_memory);
1046 i_shdrp[0] = ((Elf_Internal_Shdr *)
1047 bfd_alloc (abfd, sizeof (Elf_Internal_Shdr)));
1048 if (i_shdrp[0] == NULL)
1050 bfd_release (abfd, i_shdrp);
1051 bfd_set_error (bfd_error_no_memory);
1054 memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
1056 elf_elfsections (abfd) = i_shdrp;
1058 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
1059 if (abfd->symcount > 0)
1061 i_shdrp[t->symtab_section] = &t->symtab_hdr;
1062 i_shdrp[t->strtab_section] = &t->strtab_hdr;
1063 t->symtab_hdr.sh_link = t->strtab_section;
1065 for (sec = abfd->sections; sec; sec = sec->next)
1067 struct bfd_elf_section_data *d = elf_section_data (sec);
1071 i_shdrp[d->this_idx] = &d->this_hdr;
1072 if (d->rel_idx != 0)
1073 i_shdrp[d->rel_idx] = &d->rel_hdr;
1075 /* Fill in the sh_link and sh_info fields while we're at it. */
1077 /* sh_link of a reloc section is the section index of the symbol
1078 table. sh_info is the section index of the section to which
1079 the relocation entries apply. */
1080 if (d->rel_idx != 0)
1082 d->rel_hdr.sh_link = t->symtab_section;
1083 d->rel_hdr.sh_info = d->this_idx;
1086 switch (d->this_hdr.sh_type)
1090 /* A reloc section which we are treating as a normal BFD
1091 section. sh_link is the section index of the symbol
1092 table. sh_info is the section index of the section to
1093 which the relocation entries apply. We assume that an
1094 allocated reloc section uses the dynamic symbol table.
1095 FIXME: How can we be sure? */
1096 s = bfd_get_section_by_name (abfd, ".dynsym");
1098 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1100 /* We look up the section the relocs apply to by name. */
1102 if (d->this_hdr.sh_type == SHT_REL)
1106 s = bfd_get_section_by_name (abfd, name);
1108 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
1112 /* We assume that a section named .stab*str is a stabs
1113 string section. We look for a section with the same name
1114 but without the trailing ``str'', and set its sh_link
1115 field to point to this section. */
1116 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
1117 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
1122 len = strlen (sec->name);
1123 alc = (char *) malloc (len - 2);
1126 bfd_set_error (bfd_error_no_memory);
1129 strncpy (alc, sec->name, len - 3);
1130 alc[len - 3] = '\0';
1131 s = bfd_get_section_by_name (abfd, alc);
1135 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
1137 /* This is a .stab section. */
1138 elf_section_data (s)->this_hdr.sh_entsize =
1139 4 + 2 * (bed->s->arch_size / 8);
1146 /* sh_link is the section header index of the string table
1147 used for the dynamic entries or symbol table. */
1148 s = bfd_get_section_by_name (abfd, ".dynstr");
1150 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1154 /* sh_link is the section header index of the symbol table
1155 this hash table is for. */
1156 s = bfd_get_section_by_name (abfd, ".dynsym");
1158 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1166 /* Map symbol from it's internal number to the external number, moving
1167 all local symbols to be at the head of the list. */
1170 sym_is_global (abfd, sym)
1174 /* If the backend has a special mapping, use it. */
1175 if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
1176 return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
1179 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
1180 || bfd_is_und_section (bfd_get_section (sym))
1181 || bfd_is_com_section (bfd_get_section (sym)));
1185 elf_map_symbols (abfd)
1188 int symcount = bfd_get_symcount (abfd);
1189 asymbol **syms = bfd_get_outsymbols (abfd);
1190 asymbol **sect_syms;
1192 int num_globals = 0;
1193 int num_locals2 = 0;
1194 int num_globals2 = 0;
1196 int num_sections = 0;
1202 fprintf (stderr, "elf_map_symbols\n");
1206 /* Add a section symbol for each BFD section. FIXME: Is this really
1208 for (asect = abfd->sections; asect; asect = asect->next)
1210 if (max_index < asect->index)
1211 max_index = asect->index;
1215 sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *));
1216 if (sect_syms == NULL)
1218 bfd_set_error (bfd_error_no_memory);
1221 elf_section_syms (abfd) = sect_syms;
1223 for (idx = 0; idx < symcount; idx++)
1225 if ((syms[idx]->flags & BSF_SECTION_SYM) != 0
1226 && syms[idx]->value == 0)
1230 sec = syms[idx]->section;
1231 if (sec->owner != NULL)
1233 if (sec->owner != abfd)
1235 if (sec->output_offset != 0)
1237 sec = sec->output_section;
1238 BFD_ASSERT (sec->owner == abfd);
1240 sect_syms[sec->index] = syms[idx];
1245 for (asect = abfd->sections; asect; asect = asect->next)
1249 if (sect_syms[asect->index] != NULL)
1252 sym = bfd_make_empty_symbol (abfd);
1255 sym->the_bfd = abfd;
1256 sym->name = asect->name;
1258 /* Set the flags to 0 to indicate that this one was newly added. */
1260 sym->section = asect;
1261 sect_syms[asect->index] = sym;
1265 "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n",
1266 asect->name, (long) asect->vma, asect->index, (long) asect);
1270 /* Classify all of the symbols. */
1271 for (idx = 0; idx < symcount; idx++)
1273 if (!sym_is_global (abfd, syms[idx]))
1278 for (asect = abfd->sections; asect; asect = asect->next)
1280 if (sect_syms[asect->index] != NULL
1281 && sect_syms[asect->index]->flags == 0)
1283 sect_syms[asect->index]->flags = BSF_SECTION_SYM;
1284 if (!sym_is_global (abfd, sect_syms[asect->index]))
1288 sect_syms[asect->index]->flags = 0;
1292 /* Now sort the symbols so the local symbols are first. */
1293 new_syms = ((asymbol **)
1295 (num_locals + num_globals) * sizeof (asymbol *)));
1296 if (new_syms == NULL)
1298 bfd_set_error (bfd_error_no_memory);
1302 for (idx = 0; idx < symcount; idx++)
1304 asymbol *sym = syms[idx];
1307 if (!sym_is_global (abfd, sym))
1310 i = num_locals + num_globals2++;
1312 sym->udata.i = i + 1;
1314 for (asect = abfd->sections; asect; asect = asect->next)
1316 if (sect_syms[asect->index] != NULL
1317 && sect_syms[asect->index]->flags == 0)
1319 asymbol *sym = sect_syms[asect->index];
1322 sym->flags = BSF_SECTION_SYM;
1323 if (!sym_is_global (abfd, sym))
1326 i = num_locals + num_globals2++;
1328 sym->udata.i = i + 1;
1332 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
1334 elf_num_locals (abfd) = num_locals;
1335 elf_num_globals (abfd) = num_globals;
1339 /* Compute the file positions we are going to put the sections at, and
1340 otherwise prepare to begin writing out the ELF file. If LINK_INFO
1341 is not NULL, this is being called by the ELF backend linker. */
1344 _bfd_elf_compute_section_file_positions (abfd, link_info)
1346 struct bfd_link_info *link_info;
1348 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1350 struct bfd_strtab_hash *strtab;
1351 Elf_Internal_Shdr *shstrtab_hdr;
1353 if (abfd->output_has_begun)
1356 /* Do any elf backend specific processing first. */
1357 if (bed->elf_backend_begin_write_processing)
1358 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
1360 if (! prep_headers (abfd))
1364 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
1368 if (!assign_section_numbers (abfd))
1371 /* The backend linker builds symbol table information itself. */
1372 if (link_info == NULL)
1374 if (! swap_out_syms (abfd, &strtab))
1378 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
1379 /* sh_name was set in prep_headers. */
1380 shstrtab_hdr->sh_type = SHT_STRTAB;
1381 shstrtab_hdr->sh_flags = 0;
1382 shstrtab_hdr->sh_addr = 0;
1383 shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
1384 shstrtab_hdr->sh_entsize = 0;
1385 shstrtab_hdr->sh_link = 0;
1386 shstrtab_hdr->sh_info = 0;
1387 /* sh_offset is set in assign_file_positions_for_symtabs_and_strtabs. */
1388 shstrtab_hdr->sh_addralign = 1;
1390 if (!assign_file_positions_except_relocs (abfd,
1391 link_info == NULL ? true : false))
1394 if (link_info == NULL)
1396 /* Now that we know where the .strtab section goes, write it
1398 if ((bfd_seek (abfd, elf_tdata (abfd)->strtab_hdr.sh_offset, SEEK_SET)
1400 || ! _bfd_stringtab_emit (abfd, strtab))
1402 _bfd_stringtab_free (strtab);
1405 abfd->output_has_begun = true;
1411 /* Align to the maximum file alignment that could be required for any
1412 ELF data structure. */
1414 static INLINE file_ptr align_file_position PARAMS ((file_ptr, int));
1415 static INLINE file_ptr
1416 align_file_position (off, align)
1420 return (off + align - 1) & ~(align - 1);
1423 /* Assign a file position to a section, aligning to the required
1424 section alignment. */
1427 _bfd_elf_assign_file_position_for_section (i_shdrp, offset)
1428 Elf_Internal_Shdr *i_shdrp;
1433 /* Align the offst. */
1434 al = i_shdrp->sh_addralign;
1436 offset = BFD_ALIGN (offset, al);
1438 i_shdrp->sh_offset = offset;
1439 if (i_shdrp->bfd_section != NULL)
1440 i_shdrp->bfd_section->filepos = offset;
1441 if (i_shdrp->sh_type != SHT_NOBITS)
1442 offset += i_shdrp->sh_size;
1446 /* Get the size of the program header.
1448 SORTED_HDRS, if non-NULL, is an array of COUNT pointers to headers sorted
1449 by VMA. Non-allocated sections (!SHF_ALLOC) must appear last. All
1450 section VMAs and sizes are known so we can compute the correct value.
1451 (??? This may not be perfectly true. What cases do we miss?)
1453 If SORTED_HDRS is NULL we assume there are two segments: text and data
1454 (exclusive of .interp and .dynamic).
1456 If this is called by the linker before any of the section VMA's are set, it
1457 can't calculate the correct value for a strange memory layout. This only
1458 happens when SIZEOF_HEADERS is used in a linker script. In this case,
1459 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
1460 data segment (exclusive of .interp and .dynamic).
1462 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
1463 will be two segments. */
1465 static bfd_size_type
1466 get_program_header_size (abfd, sorted_hdrs, count, maxpagesize)
1468 Elf_Internal_Shdr **sorted_hdrs;
1470 bfd_vma maxpagesize;
1474 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1476 /* We can't return a different result each time we're called. */
1477 if (elf_tdata (abfd)->program_header_size != 0)
1478 return elf_tdata (abfd)->program_header_size;
1480 if (sorted_hdrs != NULL)
1483 unsigned int last_type;
1484 Elf_Internal_Shdr **hdrpp;
1485 /* What we think the current segment's offset is. */
1487 /* What we think the current segment's address is. */
1489 /* How big we think the current segment is. */
1491 /* What we think the current file offset is. */
1492 bfd_vma file_offset;
1493 bfd_vma next_offset;
1495 /* Scan the headers and compute the number of segments required. This
1496 code is intentionally similar to the code in map_program_segments.
1498 The `sh_offset' field isn't valid at this point, so we keep our own
1499 running total in `file_offset'.
1501 This works because section VMAs are already known. */
1504 /* Make sure the first section goes in the first segment. */
1505 file_offset = p_offset = sorted_hdrs[0]->sh_addr % maxpagesize;
1506 p_vaddr = sorted_hdrs[0]->sh_addr;
1508 last_type = SHT_PROGBITS;
1510 for (i = 0, hdrpp = sorted_hdrs; i < count; i++, hdrpp++)
1512 Elf_Internal_Shdr *hdr;
1516 /* Ignore any section which will not be part of the process
1518 if ((hdr->sh_flags & SHF_ALLOC) == 0)
1521 /* Keep track of where this and the next sections go.
1522 The section VMA must equal the file position modulo
1524 file_offset += (hdr->sh_addr - file_offset) % maxpagesize;
1525 next_offset = file_offset;
1526 if (hdr->sh_type != SHT_NOBITS)
1527 next_offset = file_offset + hdr->sh_size;
1529 /* If this section fits in the segment we are constructing, add
1531 if ((file_offset - (p_offset + p_memsz)
1532 == hdr->sh_addr - (p_vaddr + p_memsz))
1533 && (last_type != SHT_NOBITS || hdr->sh_type == SHT_NOBITS))
1535 bfd_size_type adjust;
1537 adjust = hdr->sh_addr - (p_vaddr + p_memsz);
1538 p_memsz += hdr->sh_size + adjust;
1539 file_offset = next_offset;
1540 last_type = hdr->sh_type;
1544 /* The section won't fit, start a new segment. */
1547 /* Initialize the segment. */
1548 p_vaddr = hdr->sh_addr;
1549 p_memsz = hdr->sh_size;
1550 p_offset = file_offset;
1551 file_offset = next_offset;
1553 last_type = hdr->sh_type;
1558 /* Assume we will need exactly two PT_LOAD segments: one for text
1559 and one for data. */
1563 s = bfd_get_section_by_name (abfd, ".interp");
1564 if (s != NULL && (s->flags & SEC_LOAD) != 0)
1566 /* If we have a loadable interpreter section, we need a
1567 PT_INTERP segment. In this case, assume we also need a
1568 PT_PHDR segment, although that may not be true for all
1573 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
1575 /* We need a PT_DYNAMIC segment. */
1579 /* Let the backend count up any program headers it might need. */
1580 if (bed->elf_backend_create_program_headers)
1581 segs = ((*bed->elf_backend_create_program_headers)
1582 (abfd, (Elf_Internal_Phdr *) NULL, segs));
1584 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
1585 return elf_tdata (abfd)->program_header_size;
1588 /* Create the program header. OFF is the file offset where the
1589 program header should be written. FIRST is the first loadable ELF
1590 section. SORTED_HDRS is the ELF sections sorted by section
1591 address. PHDR_SIZE is the size of the program header as returned
1592 by get_program_header_size. */
1595 map_program_segments (abfd, off, first, sorted_hdrs, phdr_size)
1598 Elf_Internal_Shdr *first;
1599 Elf_Internal_Shdr **sorted_hdrs;
1600 bfd_size_type phdr_size;
1602 Elf_Internal_Phdr phdrs[10];
1603 unsigned int phdr_count;
1604 Elf_Internal_Phdr *phdr;
1605 int phdr_size_adjust;
1607 Elf_Internal_Shdr **hdrpp;
1608 asection *sinterp, *sdyn;
1609 unsigned int last_type;
1610 Elf_Internal_Ehdr *i_ehdrp;
1611 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1613 BFD_ASSERT ((abfd->flags & (EXEC_P | DYNAMIC)) != 0);
1614 BFD_ASSERT (phdr_size / sizeof (Elf_Internal_Phdr)
1615 <= sizeof phdrs / sizeof (phdrs[0]));
1620 if (bed->want_hdr_in_seg)
1621 phdr_size_adjust = first->sh_offset - phdr_size;
1623 phdr_size_adjust = 0;
1625 /* If we have a loadable .interp section, we must create a PT_INTERP
1626 segment which must precede all PT_LOAD segments. We assume that
1627 we must also create a PT_PHDR segment, although that may not be
1628 true for all targets. */
1629 sinterp = bfd_get_section_by_name (abfd, ".interp");
1630 if (sinterp != NULL && (sinterp->flags & SEC_LOAD) != 0)
1632 BFD_ASSERT (first != NULL);
1634 phdr->p_type = PT_PHDR;
1636 phdr->p_offset = off;
1638 /* Account for any adjustment made because of the alignment of
1639 the first loadable section. */
1640 phdr_size_adjust = (first->sh_offset - phdr_size) - off;
1641 BFD_ASSERT (phdr_size_adjust >= 0 && phdr_size_adjust < 128);
1643 /* The program header precedes all loadable sections. This lets
1644 us compute its loadable address. This depends on the linker
1646 phdr->p_vaddr = first->sh_addr - (phdr_size + phdr_size_adjust);
1649 phdr->p_filesz = phdr_size;
1650 phdr->p_memsz = phdr_size;
1652 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
1653 phdr->p_flags = PF_R | PF_X;
1655 phdr->p_align = bed->s->file_align;
1656 BFD_ASSERT ((phdr->p_vaddr - phdr->p_offset) % bed->s->file_align == 0);
1658 /* Include the ELF header in the first loadable segment. */
1659 phdr_size_adjust += off;
1664 phdr->p_type = PT_INTERP;
1665 phdr->p_offset = sinterp->filepos;
1666 phdr->p_vaddr = sinterp->vma;
1668 phdr->p_filesz = sinterp->_raw_size;
1669 phdr->p_memsz = sinterp->_raw_size;
1670 phdr->p_flags = PF_R;
1671 phdr->p_align = 1 << bfd_get_section_alignment (abfd, sinterp);
1677 /* Look through the sections to see how they will be divided into
1678 program segments. The sections must be arranged in order by
1679 sh_addr for this to work correctly. */
1680 phdr->p_type = PT_NULL;
1681 last_type = SHT_PROGBITS;
1682 for (i = 1, hdrpp = sorted_hdrs;
1683 i < elf_elfheader (abfd)->e_shnum;
1686 Elf_Internal_Shdr *hdr;
1690 /* Ignore any section which will not be part of the process
1692 if ((hdr->sh_flags & SHF_ALLOC) == 0)
1695 /* If this section fits in the segment we are constructing, add
1697 if (phdr->p_type != PT_NULL
1698 && (hdr->sh_offset - (phdr->p_offset + phdr->p_memsz)
1699 == hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz))
1700 && (last_type != SHT_NOBITS || hdr->sh_type == SHT_NOBITS))
1702 bfd_size_type adjust;
1704 adjust = hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz);
1705 phdr->p_memsz += hdr->sh_size + adjust;
1706 if (hdr->sh_type != SHT_NOBITS)
1707 phdr->p_filesz += hdr->sh_size + adjust;
1708 if ((hdr->sh_flags & SHF_WRITE) != 0)
1709 phdr->p_flags |= PF_W;
1710 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
1711 phdr->p_flags |= PF_X;
1712 last_type = hdr->sh_type;
1716 /* The section won't fit, start a new segment. If we're already in one,
1717 move to the next one. */
1718 if (phdr->p_type != PT_NULL)
1724 /* Initialize the segment. */
1725 phdr->p_type = PT_LOAD;
1726 phdr->p_offset = hdr->sh_offset;
1727 phdr->p_vaddr = hdr->sh_addr;
1729 if (hdr->sh_type == SHT_NOBITS)
1732 phdr->p_filesz = hdr->sh_size;
1733 phdr->p_memsz = hdr->sh_size;
1734 phdr->p_flags = PF_R;
1735 if ((hdr->sh_flags & SHF_WRITE) != 0)
1736 phdr->p_flags |= PF_W;
1737 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
1738 phdr->p_flags |= PF_X;
1739 phdr->p_align = bed->maxpagesize;
1742 && (bed->want_hdr_in_seg
1744 && (sinterp->flags & SEC_LOAD) != 0)))
1746 phdr->p_offset -= phdr_size + phdr_size_adjust;
1747 phdr->p_vaddr -= phdr_size + phdr_size_adjust;
1748 phdr->p_filesz += phdr_size + phdr_size_adjust;
1749 phdr->p_memsz += phdr_size + phdr_size_adjust;
1752 last_type = hdr->sh_type;
1755 if (phdr->p_type != PT_NULL)
1761 /* If we have a .dynamic section, create a PT_DYNAMIC segment. */
1762 sdyn = bfd_get_section_by_name (abfd, ".dynamic");
1763 if (sdyn != NULL && (sdyn->flags & SEC_LOAD) != 0)
1765 phdr->p_type = PT_DYNAMIC;
1766 phdr->p_offset = sdyn->filepos;
1767 phdr->p_vaddr = sdyn->vma;
1769 phdr->p_filesz = sdyn->_raw_size;
1770 phdr->p_memsz = sdyn->_raw_size;
1771 phdr->p_flags = PF_R;
1772 if ((sdyn->flags & SEC_READONLY) == 0)
1773 phdr->p_flags |= PF_W;
1774 if ((sdyn->flags & SEC_CODE) != 0)
1775 phdr->p_flags |= PF_X;
1776 phdr->p_align = 1 << bfd_get_section_alignment (abfd, sdyn);
1782 /* Let the backend create additional program headers. */
1783 if (bed->elf_backend_create_program_headers)
1784 phdr_count = (*bed->elf_backend_create_program_headers) (abfd,
1788 /* Make sure the return value from get_program_header_size matches
1789 what we computed here. Actually, it's OK if we allocated too
1790 much space in the program header. */
1791 if (phdr_count > phdr_size / bed->s->sizeof_phdr)
1793 ((*_bfd_error_handler)
1794 ("%s: Not enough room for program headers (allocated %lu, need %u)",
1795 bfd_get_filename (abfd),
1796 (unsigned long) (phdr_size / bed->s->sizeof_phdr),
1798 bfd_set_error (bfd_error_bad_value);
1799 return (file_ptr) -1;
1802 /* Set up program header information. */
1803 i_ehdrp = elf_elfheader (abfd);
1804 i_ehdrp->e_phentsize = bed->s->sizeof_phdr;
1805 i_ehdrp->e_phoff = off;
1806 i_ehdrp->e_phnum = phdr_count;
1808 /* Save the program headers away. I don't think anybody uses this
1809 information right now. */
1810 elf_tdata (abfd)->phdr = ((Elf_Internal_Phdr *)
1813 * sizeof (Elf_Internal_Phdr))));
1814 if (elf_tdata (abfd)->phdr == NULL && phdr_count != 0)
1816 bfd_set_error (bfd_error_no_memory);
1817 return (file_ptr) -1;
1819 memcpy (elf_tdata (abfd)->phdr, phdrs,
1820 phdr_count * sizeof (Elf_Internal_Phdr));
1822 /* Write out the program headers. */
1823 if (bfd_seek (abfd, off, SEEK_SET) != 0)
1824 return (file_ptr) -1;
1826 if (bed->s->write_out_phdrs (abfd, phdrs, phdr_count) != 0)
1827 return (file_ptr) -1;
1829 return off + phdr_count * bed->s->sizeof_phdr;
1832 /* Work out the file positions of all the sections. This is called by
1833 _bfd_elf_compute_section_file_positions. All the section sizes and
1834 VMAs must be known before this is called.
1836 We do not consider reloc sections at this point, unless they form
1837 part of the loadable image. Reloc sections are assigned file
1838 positions in assign_file_positions_for_relocs, which is called by
1839 write_object_contents and final_link.
1841 If DOSYMS is false, we do not assign file positions for the symbol
1842 table or the string table. */
1844 static int elf_sort_hdrs PARAMS ((const PTR, const PTR));
1847 assign_file_positions_except_relocs (abfd, dosyms)
1851 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
1852 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
1853 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
1855 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1857 /* Start after the ELF header. */
1858 off = i_ehdrp->e_ehsize;
1860 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
1862 Elf_Internal_Shdr **hdrpp;
1865 /* We are not creating an executable, which means that we are
1866 not creating a program header, and that the actual order of
1867 the sections in the file is unimportant. */
1868 for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
1870 Elf_Internal_Shdr *hdr;
1873 if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
1875 hdr->sh_offset = -1;
1879 && (i == tdata->symtab_section
1880 || i == tdata->strtab_section))
1882 hdr->sh_offset = -1;
1886 off = _bfd_elf_assign_file_position_for_section (hdr, off);
1892 bfd_size_type phdr_size;
1893 bfd_vma maxpagesize;
1895 Elf_Internal_Shdr **sorted_hdrs;
1896 Elf_Internal_Shdr **hdrpp;
1898 Elf_Internal_Shdr *first;
1901 /* We are creating an executable. */
1903 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
1904 if (maxpagesize == 0)
1907 /* We must sort the sections. The GNU linker will always create
1908 the sections in an appropriate order, but the Irix 5 linker
1909 will not. We don't include the dummy first section in the
1910 sort. We sort sections which are not SHF_ALLOC to the end. */
1911 hdrppsize = (i_ehdrp->e_shnum - 1) * sizeof (Elf_Internal_Shdr *);
1912 sorted_hdrs = (Elf_Internal_Shdr **) malloc (hdrppsize);
1913 if (sorted_hdrs == NULL)
1915 bfd_set_error (bfd_error_no_memory);
1919 memcpy (sorted_hdrs, i_shdrpp + 1, hdrppsize);
1920 qsort (sorted_hdrs, (size_t) i_ehdrp->e_shnum - 1,
1921 sizeof (Elf_Internal_Shdr *), elf_sort_hdrs);
1923 /* We can't actually create the program header until we have set the
1924 file positions for the sections, and we can't do that until we know
1925 how big the header is going to be. */
1926 off = align_file_position (off, bed->s->file_align);
1927 phdr_size = get_program_header_size (abfd,
1928 sorted_hdrs, i_ehdrp->e_shnum - 1,
1930 if (phdr_size == (bfd_size_type) -1)
1933 /* Compute the file offsets of each section. */
1937 for (i = 1, hdrpp = sorted_hdrs; i < i_ehdrp->e_shnum; i++, hdrpp++)
1939 Elf_Internal_Shdr *hdr;
1942 if ((hdr->sh_flags & SHF_ALLOC) == 0)
1944 if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
1946 hdr->sh_offset = -1;
1950 && (hdr == i_shdrpp[tdata->symtab_section]
1951 || hdr == i_shdrpp[tdata->strtab_section]))
1953 hdr->sh_offset = -1;
1956 off = _bfd_elf_assign_file_position_for_section (hdr, off);
1963 /* The section VMA must equal the file position modulo
1964 the page size. This is required by the program
1966 off += (hdr->sh_addr - off) % maxpagesize;
1967 off = _bfd_elf_assign_file_position_for_section (hdr, off);
1971 /* Create the program header. */
1972 phdr_map = map_program_segments (abfd, phdr_off, first, sorted_hdrs,
1974 if (phdr_map == (file_ptr) -1)
1976 BFD_ASSERT ((bfd_size_type) phdr_map
1977 <= (bfd_size_type) phdr_off + phdr_size);
1982 /* Place the section headers. */
1983 off = align_file_position (off, bed->s->file_align);
1984 i_ehdrp->e_shoff = off;
1985 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
1987 elf_tdata (abfd)->next_file_pos = off;
1992 /* Sort the ELF headers by VMA. We sort headers which are not
1993 SHF_ALLOC to the end. */
1995 elf_sort_hdrs (arg1, arg2)
2000 const Elf_Internal_Shdr *hdr1 = *(const Elf_Internal_Shdr **) arg1;
2001 const Elf_Internal_Shdr *hdr2 = *(const Elf_Internal_Shdr **) arg2;
2003 #define TOEND(x) (((x)->sh_flags & SHF_ALLOC)==0)
2014 if (hdr1->sh_addr < hdr2->sh_addr)
2016 else if (hdr1->sh_addr > hdr2->sh_addr)
2019 /* Put !SHT_NOBITS sections before SHT_NOBITS ones.
2020 The main loop in map_program_segments requires this. */
2022 ret = (hdr1->sh_type == SHT_NOBITS) - (hdr2->sh_type == SHT_NOBITS);
2026 if (hdr1->sh_size < hdr2->sh_size)
2028 if (hdr1->sh_size > hdr2->sh_size)
2037 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
2038 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
2039 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
2041 struct bfd_strtab_hash *shstrtab;
2042 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2044 i_ehdrp = elf_elfheader (abfd);
2045 i_shdrp = elf_elfsections (abfd);
2047 shstrtab = _bfd_elf_stringtab_init ();
2048 if (shstrtab == NULL)
2051 elf_shstrtab (abfd) = shstrtab;
2053 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
2054 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
2055 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
2056 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
2058 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
2059 i_ehdrp->e_ident[EI_DATA] =
2060 abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB;
2061 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
2063 for (count = EI_PAD; count < EI_NIDENT; count++)
2064 i_ehdrp->e_ident[count] = 0;
2066 if ((abfd->flags & DYNAMIC) != 0)
2067 i_ehdrp->e_type = ET_DYN;
2068 else if ((abfd->flags & EXEC_P) != 0)
2069 i_ehdrp->e_type = ET_EXEC;
2071 i_ehdrp->e_type = ET_REL;
2073 switch (bfd_get_arch (abfd))
2075 case bfd_arch_unknown:
2076 i_ehdrp->e_machine = EM_NONE;
2078 case bfd_arch_sparc:
2079 if (bed->s->arch_size == 64)
2080 i_ehdrp->e_machine = EM_SPARC64;
2082 i_ehdrp->e_machine = EM_SPARC;
2085 i_ehdrp->e_machine = EM_386;
2088 i_ehdrp->e_machine = EM_68K;
2091 i_ehdrp->e_machine = EM_88K;
2094 i_ehdrp->e_machine = EM_860;
2096 case bfd_arch_mips: /* MIPS Rxxxx */
2097 i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
2100 i_ehdrp->e_machine = EM_PARISC;
2102 case bfd_arch_powerpc:
2103 i_ehdrp->e_machine = EM_PPC;
2105 /* start-sanitize-arc */
2107 i_ehdrp->e_machine = EM_CYGNUS_ARC;
2109 /* end-sanitize-arc */
2110 /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
2112 i_ehdrp->e_machine = EM_NONE;
2114 i_ehdrp->e_version = bed->s->ev_current;
2115 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
2117 /* no program header, for now. */
2118 i_ehdrp->e_phoff = 0;
2119 i_ehdrp->e_phentsize = 0;
2120 i_ehdrp->e_phnum = 0;
2122 /* each bfd section is section header entry */
2123 i_ehdrp->e_entry = bfd_get_start_address (abfd);
2124 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
2126 /* if we're building an executable, we'll need a program header table */
2127 if (abfd->flags & EXEC_P)
2129 /* it all happens later */
2131 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
2133 /* elf_build_phdrs() returns a (NULL-terminated) array of
2134 Elf_Internal_Phdrs */
2135 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
2136 i_ehdrp->e_phoff = outbase;
2137 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
2142 i_ehdrp->e_phentsize = 0;
2144 i_ehdrp->e_phoff = 0;
2147 elf_tdata (abfd)->symtab_hdr.sh_name =
2148 (unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false);
2149 elf_tdata (abfd)->strtab_hdr.sh_name =
2150 (unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false);
2151 elf_tdata (abfd)->shstrtab_hdr.sh_name =
2152 (unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false);
2153 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
2154 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
2155 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
2161 /* Assign file positions for all the reloc sections which are not part
2162 of the loadable file image. */
2165 _bfd_elf_assign_file_positions_for_relocs (abfd)
2170 Elf_Internal_Shdr **shdrpp;
2172 off = elf_tdata (abfd)->next_file_pos;
2174 for (i = 1, shdrpp = elf_elfsections (abfd) + 1;
2175 i < elf_elfheader (abfd)->e_shnum;
2178 Elf_Internal_Shdr *shdrp;
2181 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
2182 && shdrp->sh_offset == -1)
2183 off = _bfd_elf_assign_file_position_for_section (shdrp, off);
2186 elf_tdata (abfd)->next_file_pos = off;
2190 _bfd_elf_write_object_contents (abfd)
2193 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2194 Elf_Internal_Ehdr *i_ehdrp;
2195 Elf_Internal_Shdr **i_shdrp;
2199 if (! abfd->output_has_begun
2200 && ! _bfd_elf_compute_section_file_positions (abfd,
2201 (struct bfd_link_info *) NULL))
2204 i_shdrp = elf_elfsections (abfd);
2205 i_ehdrp = elf_elfheader (abfd);
2208 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
2211 _bfd_elf_assign_file_positions_for_relocs (abfd);
2213 /* After writing the headers, we need to write the sections too... */
2214 for (count = 1; count < i_ehdrp->e_shnum; count++)
2216 if (bed->elf_backend_section_processing)
2217 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
2218 if (i_shdrp[count]->contents)
2220 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
2221 || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size,
2223 != i_shdrp[count]->sh_size))
2228 /* Write out the section header names. */
2229 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
2230 || ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd)))
2233 if (bed->elf_backend_final_write_processing)
2234 (*bed->elf_backend_final_write_processing) (abfd,
2235 elf_tdata (abfd)->linker);
2237 return bed->s->write_shdrs_and_ehdr (abfd);
2240 /* given a section, search the header to find them... */
2242 _bfd_elf_section_from_bfd_section (abfd, asect)
2246 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2247 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
2249 Elf_Internal_Shdr *hdr;
2250 int maxindex = elf_elfheader (abfd)->e_shnum;
2252 for (index = 0; index < maxindex; index++)
2254 hdr = i_shdrp[index];
2255 if (hdr->bfd_section == asect)
2259 if (bed->elf_backend_section_from_bfd_section)
2261 for (index = 0; index < maxindex; index++)
2265 hdr = i_shdrp[index];
2267 if ((*bed->elf_backend_section_from_bfd_section)
2268 (abfd, hdr, asect, &retval))
2273 if (bfd_is_abs_section (asect))
2275 if (bfd_is_com_section (asect))
2277 if (bfd_is_und_section (asect))
2283 /* given a symbol, return the bfd index for that symbol. */
2285 _bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
2287 struct symbol_cache_entry **asym_ptr_ptr;
2289 struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr;
2291 flagword flags = asym_ptr->flags;
2293 /* When gas creates relocations against local labels, it creates its
2294 own symbol for the section, but does put the symbol into the
2295 symbol chain, so udata is 0. When the linker is generating
2296 relocatable output, this section symbol may be for one of the
2297 input sections rather than the output section. */
2298 if (asym_ptr->udata.i == 0
2299 && (flags & BSF_SECTION_SYM)
2300 && asym_ptr->section)
2304 if (asym_ptr->section->output_section != NULL)
2305 indx = asym_ptr->section->output_section->index;
2307 indx = asym_ptr->section->index;
2308 if (elf_section_syms (abfd)[indx])
2309 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
2312 idx = asym_ptr->udata.i;
2313 BFD_ASSERT (idx != 0);
2318 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
2319 (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags));
2328 swap_out_syms (abfd, sttp)
2330 struct bfd_strtab_hash **sttp;
2332 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2334 if (!elf_map_symbols (abfd))
2337 /* Dump out the symtabs. */
2339 int symcount = bfd_get_symcount (abfd);
2340 asymbol **syms = bfd_get_outsymbols (abfd);
2341 struct bfd_strtab_hash *stt;
2342 Elf_Internal_Shdr *symtab_hdr;
2343 Elf_Internal_Shdr *symstrtab_hdr;
2344 char *outbound_syms;
2347 stt = _bfd_elf_stringtab_init ();
2351 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2352 symtab_hdr->sh_type = SHT_SYMTAB;
2353 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
2354 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
2355 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
2356 symtab_hdr->sh_addralign = bed->s->file_align;
2358 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
2359 symstrtab_hdr->sh_type = SHT_STRTAB;
2361 outbound_syms = bfd_alloc (abfd,
2362 (1 + symcount) * bed->s->sizeof_sym);
2363 if (outbound_syms == NULL)
2365 bfd_set_error (bfd_error_no_memory);
2368 symtab_hdr->contents = (PTR) outbound_syms;
2370 /* now generate the data (for "contents") */
2372 /* Fill in zeroth symbol and swap it out. */
2373 Elf_Internal_Sym sym;
2379 sym.st_shndx = SHN_UNDEF;
2380 bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
2381 outbound_syms += bed->s->sizeof_sym;
2383 for (idx = 0; idx < symcount; idx++)
2385 Elf_Internal_Sym sym;
2386 bfd_vma value = syms[idx]->value;
2387 elf_symbol_type *type_ptr;
2388 flagword flags = syms[idx]->flags;
2390 if (flags & BSF_SECTION_SYM)
2391 /* Section symbols have no names. */
2395 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
2398 if (sym.st_name == (unsigned long) -1)
2402 type_ptr = elf_symbol_from (abfd, syms[idx]);
2404 if (bfd_is_com_section (syms[idx]->section))
2406 /* ELF common symbols put the alignment into the `value' field,
2407 and the size into the `size' field. This is backwards from
2408 how BFD handles it, so reverse it here. */
2409 sym.st_size = value;
2410 if (type_ptr == NULL
2411 || type_ptr->internal_elf_sym.st_value == 0)
2412 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
2414 sym.st_value = type_ptr->internal_elf_sym.st_value;
2415 sym.st_shndx = _bfd_elf_section_from_bfd_section (abfd,
2416 syms[idx]->section);
2420 asection *sec = syms[idx]->section;
2423 if (sec->output_section)
2425 value += sec->output_offset;
2426 sec = sec->output_section;
2429 sym.st_value = value;
2430 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
2431 sym.st_shndx = shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
2435 /* Writing this would be a hell of a lot easier if we had
2436 some decent documentation on bfd, and knew what to expect
2437 of the library, and what to demand of applications. For
2438 example, it appears that `objcopy' might not set the
2439 section of a symbol to be a section that is actually in
2441 sec2 = bfd_get_section_by_name (abfd, sec->name);
2442 BFD_ASSERT (sec2 != 0);
2443 sym.st_shndx = shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
2444 BFD_ASSERT (shndx != -1);
2448 if (bfd_is_com_section (syms[idx]->section))
2449 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_OBJECT);
2450 else if (bfd_is_und_section (syms[idx]->section))
2451 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
2454 ((flags & BSF_FUNCTION)
2457 else if (flags & BSF_SECTION_SYM)
2458 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
2459 else if (flags & BSF_FILE)
2460 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
2463 int bind = STB_LOCAL;
2464 int type = STT_OBJECT;
2466 if (flags & BSF_LOCAL)
2468 else if (flags & BSF_WEAK)
2470 else if (flags & BSF_GLOBAL)
2473 if (flags & BSF_FUNCTION)
2476 sym.st_info = ELF_ST_INFO (bind, type);
2480 bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
2481 outbound_syms += bed->s->sizeof_sym;
2485 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
2486 symstrtab_hdr->sh_type = SHT_STRTAB;
2488 symstrtab_hdr->sh_flags = 0;
2489 symstrtab_hdr->sh_addr = 0;
2490 symstrtab_hdr->sh_entsize = 0;
2491 symstrtab_hdr->sh_link = 0;
2492 symstrtab_hdr->sh_info = 0;
2493 symstrtab_hdr->sh_addralign = 1;
2499 /* Return the number of bytes required to hold the symtab vector.
2501 Note that we base it on the count plus 1, since we will null terminate
2502 the vector allocated based on this size. However, the ELF symbol table
2503 always has a dummy entry as symbol #0, so it ends up even. */
2506 _bfd_elf_get_symtab_upper_bound (abfd)
2511 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
2513 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
2514 symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
2520 _bfd_elf_get_dynamic_symtab_upper_bound (abfd)
2525 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
2527 if (elf_dynsymtab (abfd) == 0)
2529 bfd_set_error (bfd_error_invalid_operation);
2533 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
2534 symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
2540 _bfd_elf_get_reloc_upper_bound (abfd, asect)
2544 return (asect->reloc_count + 1) * sizeof (arelent *);
2547 /* Canonicalize the relocs. */
2550 _bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols)
2559 if (! get_elf_backend_data (abfd)->s->slurp_reloc_table (abfd, section, symbols))
2562 tblptr = section->relocation;
2563 for (i = 0; i < section->reloc_count; i++)
2564 *relptr++ = tblptr++;
2568 return section->reloc_count;
2572 _bfd_elf_get_symtab (abfd, alocation)
2574 asymbol **alocation;
2576 long symcount = get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, false);
2579 bfd_get_symcount (abfd) = symcount;
2584 _bfd_elf_canonicalize_dynamic_symtab (abfd, alocation)
2586 asymbol **alocation;
2588 return get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, true);
2592 _bfd_elf_make_empty_symbol (abfd)
2595 elf_symbol_type *newsym;
2597 newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type));
2600 bfd_set_error (bfd_error_no_memory);
2605 newsym->symbol.the_bfd = abfd;
2606 return &newsym->symbol;
2611 _bfd_elf_get_symbol_info (ignore_abfd, symbol, ret)
2616 bfd_symbol_info (symbol, ret);
2620 _bfd_elf_get_lineno (ignore_abfd, symbol)
2629 _bfd_elf_set_arch_mach (abfd, arch, machine)
2631 enum bfd_architecture arch;
2632 unsigned long machine;
2634 /* If this isn't the right architecture for this backend, and this
2635 isn't the generic backend, fail. */
2636 if (arch != get_elf_backend_data (abfd)->arch
2637 && arch != bfd_arch_unknown
2638 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
2641 return bfd_default_set_arch_mach (abfd, arch, machine);
2644 /* Find the nearest line to a particular section and offset, for error
2648 _bfd_elf_find_nearest_line (abfd,
2659 CONST char **filename_ptr;
2660 CONST char **functionname_ptr;
2661 unsigned int *line_ptr;
2663 const char *filename;
2667 if (symbols == NULL)
2673 for (p = symbols; *p != NULL; p++)
2677 q = (elf_symbol_type *) *p;
2679 if (bfd_get_section (&q->symbol) != section)
2682 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
2687 filename = bfd_asymbol_name (&q->symbol);
2691 || q->symbol.value <= offset)
2692 func = (asymbol *) q;
2700 *filename_ptr = filename;
2701 *functionname_ptr = bfd_asymbol_name (func);
2707 _bfd_elf_sizeof_headers (abfd, reloc)
2713 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
2715 ret += get_program_header_size (abfd, (Elf_Internal_Shdr **) NULL, 0,
2721 _bfd_elf_set_section_contents (abfd, section, location, offset, count)
2726 bfd_size_type count;
2728 Elf_Internal_Shdr *hdr;
2730 if (! abfd->output_has_begun
2731 && ! _bfd_elf_compute_section_file_positions (abfd,
2732 (struct bfd_link_info *) NULL))
2735 hdr = &elf_section_data (section)->this_hdr;
2737 if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1)
2739 if (bfd_write (location, 1, count, abfd) != count)
2746 _bfd_elf_no_info_to_howto (abfd, cache_ptr, dst)
2749 Elf_Internal_Rela *dst;
2756 _bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
2759 Elf_Internal_Rel *dst;