| /* Support for the generic parts of COFF, for BFD. |
| Copyright (C) 1990-2024 Free Software Foundation, Inc. |
| Written by Cygnus Support. |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| /* Most of this hacked by Steve Chamberlain, sac@cygnus.com. |
| Split out of coffcode.h by Ian Taylor, ian@cygnus.com. */ |
| |
| /* This file contains COFF code that is not dependent on any |
| particular COFF target. There is only one version of this file in |
| libbfd.a, so no target specific code may be put in here. Or, to |
| put it another way, |
| |
| ********** DO NOT PUT TARGET SPECIFIC CODE IN THIS FILE ********** |
| |
| If you need to add some target specific behaviour, add a new hook |
| function to bfd_coff_backend_data. |
| |
| Some of these functions are also called by the ECOFF routines. |
| Those functions may not use any COFF specific information, such as |
| coff_data (abfd). */ |
| |
| #include "sysdep.h" |
| #include <limits.h> |
| #include "bfd.h" |
| #include "libbfd.h" |
| #include "coff/internal.h" |
| #include "libcoff.h" |
| #include "hashtab.h" |
| |
| /* Extract a long section name at STRINDEX and copy it to the bfd objstack. |
| Return NULL in case of error. */ |
| |
| static char * |
| extract_long_section_name(bfd *abfd, unsigned long strindex) |
| { |
| const char *strings; |
| char *name; |
| |
| strings = _bfd_coff_read_string_table (abfd); |
| if (strings == NULL) |
| return NULL; |
| if ((bfd_size_type)(strindex + 2) >= obj_coff_strings_len (abfd)) |
| return NULL; |
| strings += strindex; |
| name = (char *) bfd_alloc (abfd, (bfd_size_type) strlen (strings) + 1); |
| if (name == NULL) |
| return NULL; |
| strcpy (name, strings); |
| |
| return name; |
| } |
| |
| /* Decode a base 64 coded string at STR of length LEN, and write the result |
| to RES. Return true on success. |
| Return false in case of invalid character or overflow. */ |
| |
| static bool |
| decode_base64 (const char *str, unsigned len, uint32_t *res) |
| { |
| unsigned i; |
| uint32_t val; |
| |
| val = 0; |
| for (i = 0; i < len; i++) |
| { |
| char c = str[i]; |
| unsigned d; |
| |
| if (c >= 'A' && c <= 'Z') |
| d = c - 'A'; |
| else if (c >= 'a' && c <= 'z') |
| d = c - 'a' + 26; |
| else if (c >= '0' && c <= '9') |
| d = c - '0' + 52; |
| else if (c == '+') |
| d = 62; |
| else if (c == '/') |
| d = 63; |
| else |
| return false; |
| |
| /* Check for overflow. */ |
| if ((val >> 26) != 0) |
| return false; |
| |
| val = (val << 6) + d; |
| } |
| |
| *res = val; |
| return true; |
| } |
| |
| /* Take a section header read from a coff file (in HOST byte order), |
| and make a BFD "section" out of it. This is used by ECOFF. */ |
| |
| static bool |
| make_a_section_from_file (bfd *abfd, |
| struct internal_scnhdr *hdr, |
| unsigned int target_index) |
| { |
| asection *newsect; |
| char *name; |
| bool result = true; |
| flagword flags; |
| |
| name = NULL; |
| |
| /* Handle long section names as in PE. On reading, we want to |
| accept long names if the format permits them at all, regardless |
| of the current state of the flag that dictates if we would generate |
| them in outputs; this construct checks if that is the case by |
| attempting to set the flag, without changing its state; the call |
| will fail for formats that do not support long names at all. */ |
| if (bfd_coff_set_long_section_names (abfd, bfd_coff_long_section_names (abfd)) |
| && hdr->s_name[0] == '/') |
| { |
| /* Flag that this BFD uses long names, even though the format might |
| expect them to be off by default. This won't directly affect the |
| format of any output BFD created from this one, but the information |
| can be used to decide what to do. */ |
| bfd_coff_set_long_section_names (abfd, true); |
| |
| if (hdr->s_name[1] == '/') |
| { |
| /* LLVM extension: the '/' is followed by another '/' and then by |
| the index in the strtab encoded in base64 without NUL at the |
| end. */ |
| uint32_t strindex; |
| |
| /* Decode the index. No overflow is expected as the string table |
| length is at most 2^32 - 1 (the length is written on the first |
| four bytes). |
| Also, contrary to RFC 4648, all the characters must be decoded, |
| there is no padding. */ |
| if (!decode_base64 (hdr->s_name + 2, SCNNMLEN - 2, &strindex)) |
| return false; |
| |
| name = extract_long_section_name (abfd, strindex); |
| if (name == NULL) |
| return false; |
| } |
| else |
| { |
| /* PE classic long section name. The '/' is followed by the index |
| in the strtab. The index is formatted as a decimal string. */ |
| char buf[SCNNMLEN]; |
| long strindex; |
| char *p; |
| |
| memcpy (buf, hdr->s_name + 1, SCNNMLEN - 1); |
| buf[SCNNMLEN - 1] = '\0'; |
| strindex = strtol (buf, &p, 10); |
| if (*p == '\0' && strindex >= 0) |
| { |
| name = extract_long_section_name (abfd, strindex); |
| if (name == NULL) |
| return false; |
| } |
| } |
| } |
| |
| if (name == NULL) |
| { |
| /* Assorted wastage to null-terminate the name, thanks AT&T! */ |
| name = (char *) bfd_alloc (abfd, |
| (bfd_size_type) sizeof (hdr->s_name) + 1 + 1); |
| if (name == NULL) |
| return false; |
| strncpy (name, (char *) &hdr->s_name[0], sizeof (hdr->s_name)); |
| name[sizeof (hdr->s_name)] = 0; |
| } |
| |
| newsect = bfd_make_section_anyway (abfd, name); |
| if (newsect == NULL) |
| return false; |
| |
| newsect->vma = hdr->s_vaddr; |
| newsect->lma = hdr->s_paddr; |
| newsect->size = hdr->s_size; |
| newsect->filepos = hdr->s_scnptr; |
| newsect->rel_filepos = hdr->s_relptr; |
| newsect->reloc_count = hdr->s_nreloc; |
| |
| bfd_coff_set_alignment_hook (abfd, newsect, hdr); |
| |
| newsect->line_filepos = hdr->s_lnnoptr; |
| |
| newsect->lineno_count = hdr->s_nlnno; |
| newsect->userdata = NULL; |
| newsect->next = NULL; |
| newsect->target_index = target_index; |
| |
| if (!bfd_coff_styp_to_sec_flags_hook (abfd, hdr, name, newsect, &flags)) |
| result = false; |
| |
| /* At least on i386-coff, the line number count for a shared library |
| section must be ignored. */ |
| if ((flags & SEC_COFF_SHARED_LIBRARY) != 0) |
| newsect->lineno_count = 0; |
| |
| if (hdr->s_nreloc != 0) |
| flags |= SEC_RELOC; |
| /* FIXME: should this check 'hdr->s_size > 0'. */ |
| if (hdr->s_scnptr != 0) |
| flags |= SEC_HAS_CONTENTS; |
| |
| newsect->flags = flags; |
| |
| /* Compress/decompress DWARF debug sections. */ |
| if ((flags & SEC_DEBUGGING) != 0 |
| && (flags & SEC_HAS_CONTENTS) != 0 |
| && (startswith (name, ".debug_") |
| || startswith (name, ".zdebug_") |
| || startswith (name, ".gnu.debuglto_.debug_") |
| || startswith (name, ".gnu.linkonce.wi."))) |
| { |
| enum { nothing, compress, decompress } action = nothing; |
| |
| if (bfd_is_section_compressed (abfd, newsect)) |
| { |
| /* Compressed section. Check if we should decompress. */ |
| if ((abfd->flags & BFD_DECOMPRESS)) |
| action = decompress; |
| } |
| else |
| { |
| /* Normal section. Check if we should compress. */ |
| if ((abfd->flags & BFD_COMPRESS) && newsect->size != 0) |
| action = compress; |
| } |
| |
| if (action == compress) |
| { |
| if (!bfd_init_section_compress_status (abfd, newsect)) |
| { |
| _bfd_error_handler |
| /* xgettext:c-format */ |
| (_("%pB: unable to compress section %s"), abfd, name); |
| return false; |
| } |
| } |
| else if (action == decompress) |
| { |
| if (!bfd_init_section_decompress_status (abfd, newsect)) |
| { |
| _bfd_error_handler |
| /* xgettext:c-format */ |
| (_("%pB: unable to decompress section %s"), abfd, name); |
| return false; |
| } |
| if (abfd->is_linker_input |
| && name[1] == 'z') |
| { |
| /* Rename section from .zdebug_* to .debug_* so that ld |
| scripts will see this section as a debug section. */ |
| char *new_name = bfd_zdebug_name_to_debug (abfd, name); |
| if (new_name == NULL) |
| return false; |
| bfd_rename_section (newsect, new_name); |
| } |
| } |
| } |
| |
| return result; |
| } |
| |
| void |
| coff_object_cleanup (bfd *abfd) |
| { |
| struct coff_tdata *td = coff_data (abfd); |
| if (td != NULL) |
| { |
| if (td->section_by_index) |
| htab_delete (td->section_by_index); |
| if (td->section_by_target_index) |
| htab_delete (td->section_by_target_index); |
| if (obj_pe (abfd) && pe_data (abfd)->comdat_hash) |
| htab_delete (pe_data (abfd)->comdat_hash); |
| } |
| } |
| |
| /* Read in a COFF object and make it into a BFD. This is used by |
| ECOFF as well. */ |
| bfd_cleanup |
| coff_real_object_p (bfd *abfd, |
| unsigned nscns, |
| struct internal_filehdr *internal_f, |
| struct internal_aouthdr *internal_a) |
| { |
| flagword oflags = abfd->flags; |
| bfd_vma ostart = bfd_get_start_address (abfd); |
| void * tdata; |
| void * tdata_save; |
| bfd_size_type readsize; /* Length of file_info. */ |
| unsigned int scnhsz; |
| char *external_sections; |
| |
| if (!(internal_f->f_flags & F_RELFLG)) |
| abfd->flags |= HAS_RELOC; |
| if ((internal_f->f_flags & F_EXEC)) |
| abfd->flags |= EXEC_P; |
| if (!(internal_f->f_flags & F_LNNO)) |
| abfd->flags |= HAS_LINENO; |
| if (!(internal_f->f_flags & F_LSYMS)) |
| abfd->flags |= HAS_LOCALS; |
| |
| /* FIXME: How can we set D_PAGED correctly? */ |
| if ((internal_f->f_flags & F_EXEC) != 0) |
| abfd->flags |= D_PAGED; |
| |
| abfd->symcount = internal_f->f_nsyms; |
| if (internal_f->f_nsyms) |
| abfd->flags |= HAS_SYMS; |
| |
| if (internal_a != (struct internal_aouthdr *) NULL) |
| abfd->start_address = internal_a->entry; |
| else |
| abfd->start_address = 0; |
| |
| /* Set up the tdata area. ECOFF uses its own routine, and overrides |
| abfd->flags. */ |
| tdata_save = abfd->tdata.any; |
| tdata = bfd_coff_mkobject_hook (abfd, (void *) internal_f, (void *) internal_a); |
| if (tdata == NULL) |
| goto fail2; |
| |
| scnhsz = bfd_coff_scnhsz (abfd); |
| readsize = (bfd_size_type) nscns * scnhsz; |
| external_sections = (char *) _bfd_alloc_and_read (abfd, readsize, readsize); |
| if (!external_sections) |
| goto fail; |
| |
| /* Set the arch/mach *before* swapping in sections; section header swapping |
| may depend on arch/mach info. */ |
| if (! bfd_coff_set_arch_mach_hook (abfd, (void *) internal_f)) |
| goto fail; |
| |
| /* Now copy data as required; construct all asections etc. */ |
| if (nscns != 0) |
| { |
| unsigned int i; |
| for (i = 0; i < nscns; i++) |
| { |
| struct internal_scnhdr tmp; |
| bfd_coff_swap_scnhdr_in (abfd, |
| (void *) (external_sections + i * scnhsz), |
| (void *) & tmp); |
| if (! make_a_section_from_file (abfd, &tmp, i + 1)) |
| goto fail; |
| } |
| } |
| |
| _bfd_coff_free_symbols (abfd); |
| return coff_object_cleanup; |
| |
| fail: |
| coff_object_cleanup (abfd); |
| _bfd_coff_free_symbols (abfd); |
| bfd_release (abfd, tdata); |
| fail2: |
| abfd->tdata.any = tdata_save; |
| abfd->flags = oflags; |
| abfd->start_address = ostart; |
| return NULL; |
| } |
| |
| /* Turn a COFF file into a BFD, but fail with bfd_error_wrong_format if it is |
| not a COFF file. This is also used by ECOFF. */ |
| |
| bfd_cleanup |
| coff_object_p (bfd *abfd) |
| { |
| bfd_size_type filhsz; |
| bfd_size_type aoutsz; |
| unsigned int nscns; |
| void * filehdr; |
| struct internal_filehdr internal_f; |
| struct internal_aouthdr internal_a; |
| |
| /* Figure out how much to read. */ |
| filhsz = bfd_coff_filhsz (abfd); |
| aoutsz = bfd_coff_aoutsz (abfd); |
| |
| filehdr = _bfd_alloc_and_read (abfd, filhsz, filhsz); |
| if (filehdr == NULL) |
| { |
| if (bfd_get_error () != bfd_error_system_call) |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| bfd_coff_swap_filehdr_in (abfd, filehdr, &internal_f); |
| bfd_release (abfd, filehdr); |
| |
| /* The XCOFF format has two sizes for the f_opthdr. SMALL_AOUTSZ |
| (less than aoutsz) used in object files and AOUTSZ (equal to |
| aoutsz) in executables. The bfd_coff_swap_aouthdr_in function |
| expects this header to be aoutsz bytes in length, so we use that |
| value in the call to bfd_alloc below. But we must be careful to |
| only read in f_opthdr bytes in the call to bfd_read. We should |
| also attempt to catch corrupt or non-COFF binaries with a strange |
| value for f_opthdr. */ |
| if (! bfd_coff_bad_format_hook (abfd, &internal_f) |
| || internal_f.f_opthdr > aoutsz) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| nscns = internal_f.f_nscns; |
| |
| if (internal_f.f_opthdr) |
| { |
| void * opthdr; |
| |
| opthdr = _bfd_alloc_and_read (abfd, aoutsz, internal_f.f_opthdr); |
| if (opthdr == NULL) |
| return NULL; |
| /* PR 17512: file: 11056-1136-0.004. */ |
| if (internal_f.f_opthdr < aoutsz) |
| memset (((char *) opthdr) + internal_f.f_opthdr, 0, |
| aoutsz - internal_f.f_opthdr); |
| |
| bfd_coff_swap_aouthdr_in (abfd, opthdr, (void *) &internal_a); |
| bfd_release (abfd, opthdr); |
| } |
| |
| return coff_real_object_p (abfd, nscns, &internal_f, |
| (internal_f.f_opthdr != 0 |
| ? &internal_a |
| : (struct internal_aouthdr *) NULL)); |
| } |
| |
| static hashval_t |
| htab_hash_section_target_index (const void * entry) |
| { |
| const struct bfd_section * sec = entry; |
| return sec->target_index; |
| } |
| |
| static int |
| htab_eq_section_target_index (const void * e1, const void * e2) |
| { |
| const struct bfd_section * sec1 = e1; |
| const struct bfd_section * sec2 = e2; |
| return sec1->target_index == sec2->target_index; |
| } |
| |
| /* Get the BFD section from a COFF symbol section number. */ |
| |
| asection * |
| coff_section_from_bfd_index (bfd *abfd, int section_index) |
| { |
| if (section_index == N_ABS) |
| return bfd_abs_section_ptr; |
| if (section_index == N_UNDEF) |
| return bfd_und_section_ptr; |
| if (section_index == N_DEBUG) |
| return bfd_abs_section_ptr; |
| |
| struct bfd_section *answer; |
| htab_t table = coff_data (abfd)->section_by_target_index; |
| |
| if (!table) |
| { |
| table = htab_create (10, htab_hash_section_target_index, |
| htab_eq_section_target_index, NULL); |
| if (table == NULL) |
| return bfd_und_section_ptr; |
| coff_data (abfd)->section_by_target_index = table; |
| } |
| |
| if (htab_elements (table) == 0) |
| { |
| for (answer = abfd->sections; answer; answer = answer->next) |
| { |
| void **slot = htab_find_slot (table, answer, INSERT); |
| if (slot == NULL) |
| return bfd_und_section_ptr; |
| *slot = answer; |
| } |
| } |
| |
| struct bfd_section needle; |
| needle.target_index = section_index; |
| |
| answer = htab_find (table, &needle); |
| if (answer != NULL) |
| return answer; |
| |
| /* Cover the unlikely case of sections added after the first call to |
| this function. */ |
| for (answer = abfd->sections; answer; answer = answer->next) |
| if (answer->target_index == section_index) |
| { |
| void **slot = htab_find_slot (table, answer, INSERT); |
| if (slot != NULL) |
| *slot = answer; |
| return answer; |
| } |
| |
| /* We should not reach this point, but the SCO 3.2v4 /lib/libc_s.a |
| has a bad symbol table in biglitpow.o. */ |
| return bfd_und_section_ptr; |
| } |
| |
| /* Get the upper bound of a COFF symbol table. */ |
| |
| long |
| coff_get_symtab_upper_bound (bfd *abfd) |
| { |
| if (!bfd_coff_slurp_symbol_table (abfd)) |
| return -1; |
| |
| return (bfd_get_symcount (abfd) + 1) * (sizeof (coff_symbol_type *)); |
| } |
| |
| /* Canonicalize a COFF symbol table. */ |
| |
| long |
| coff_canonicalize_symtab (bfd *abfd, asymbol **alocation) |
| { |
| unsigned int counter; |
| coff_symbol_type *symbase; |
| coff_symbol_type **location = (coff_symbol_type **) alocation; |
| |
| if (!bfd_coff_slurp_symbol_table (abfd)) |
| return -1; |
| |
| symbase = obj_symbols (abfd); |
| counter = bfd_get_symcount (abfd); |
| while (counter-- > 0) |
| *location++ = symbase++; |
| |
| *location = NULL; |
| |
| return bfd_get_symcount (abfd); |
| } |
| |
| /* Get the name of a symbol. The caller must pass in a buffer of size |
| >= SYMNMLEN + 1. */ |
| |
| const char * |
| _bfd_coff_internal_syment_name (bfd *abfd, |
| const struct internal_syment *sym, |
| char *buf) |
| { |
| /* FIXME: It's not clear this will work correctly if sizeof |
| (_n_zeroes) != 4. */ |
| if (sym->_n._n_n._n_zeroes != 0 |
| || sym->_n._n_n._n_offset == 0) |
| { |
| memcpy (buf, sym->_n._n_name, SYMNMLEN); |
| buf[SYMNMLEN] = '\0'; |
| return buf; |
| } |
| else |
| { |
| const char *strings; |
| |
| BFD_ASSERT (sym->_n._n_n._n_offset >= STRING_SIZE_SIZE); |
| strings = obj_coff_strings (abfd); |
| if (strings == NULL) |
| { |
| strings = _bfd_coff_read_string_table (abfd); |
| if (strings == NULL) |
| return NULL; |
| } |
| if (sym->_n._n_n._n_offset >= obj_coff_strings_len (abfd)) |
| return NULL; |
| return strings + sym->_n._n_n._n_offset; |
| } |
| } |
| |
| /* Read in and swap the relocs. This returns a buffer holding the |
| relocs for section SEC in file ABFD. If CACHE is TRUE and |
| INTERNAL_RELOCS is NULL, the relocs read in will be saved in case |
| the function is called again. If EXTERNAL_RELOCS is not NULL, it |
| is a buffer large enough to hold the unswapped relocs. If |
| INTERNAL_RELOCS is not NULL, it is a buffer large enough to hold |
| the swapped relocs. If REQUIRE_INTERNAL is TRUE, then the return |
| value must be INTERNAL_RELOCS. The function returns NULL on error. */ |
| |
| struct internal_reloc * |
| _bfd_coff_read_internal_relocs (bfd *abfd, |
| asection *sec, |
| bool cache, |
| bfd_byte *external_relocs, |
| bool require_internal, |
| struct internal_reloc *internal_relocs) |
| { |
| bfd_size_type relsz; |
| bfd_byte *free_external = NULL; |
| struct internal_reloc *free_internal = NULL; |
| bfd_byte *erel; |
| bfd_byte *erel_end; |
| struct internal_reloc *irel; |
| bfd_size_type amt; |
| |
| if (sec->reloc_count == 0) |
| return internal_relocs; /* Nothing to do. */ |
| |
| if (coff_section_data (abfd, sec) != NULL |
| && coff_section_data (abfd, sec)->relocs != NULL) |
| { |
| if (! require_internal) |
| return coff_section_data (abfd, sec)->relocs; |
| memcpy (internal_relocs, coff_section_data (abfd, sec)->relocs, |
| sec->reloc_count * sizeof (struct internal_reloc)); |
| return internal_relocs; |
| } |
| |
| relsz = bfd_coff_relsz (abfd); |
| |
| amt = sec->reloc_count * relsz; |
| if (external_relocs == NULL) |
| { |
| free_external = (bfd_byte *) bfd_malloc (amt); |
| if (free_external == NULL) |
| goto error_return; |
| external_relocs = free_external; |
| } |
| |
| if (bfd_seek (abfd, sec->rel_filepos, SEEK_SET) != 0 |
| || bfd_read (external_relocs, amt, abfd) != amt) |
| goto error_return; |
| |
| if (internal_relocs == NULL) |
| { |
| amt = sec->reloc_count; |
| amt *= sizeof (struct internal_reloc); |
| free_internal = (struct internal_reloc *) bfd_malloc (amt); |
| if (free_internal == NULL) |
| goto error_return; |
| internal_relocs = free_internal; |
| } |
| |
| /* Swap in the relocs. */ |
| erel = external_relocs; |
| erel_end = erel + relsz * sec->reloc_count; |
| irel = internal_relocs; |
| for (; erel < erel_end; erel += relsz, irel++) |
| bfd_coff_swap_reloc_in (abfd, (void *) erel, (void *) irel); |
| |
| free (free_external); |
| free_external = NULL; |
| |
| if (cache && free_internal != NULL) |
| { |
| if (coff_section_data (abfd, sec) == NULL) |
| { |
| amt = sizeof (struct coff_section_tdata); |
| sec->used_by_bfd = bfd_zalloc (abfd, amt); |
| if (sec->used_by_bfd == NULL) |
| goto error_return; |
| coff_section_data (abfd, sec)->contents = NULL; |
| } |
| coff_section_data (abfd, sec)->relocs = free_internal; |
| } |
| |
| return internal_relocs; |
| |
| error_return: |
| free (free_external); |
| free (free_internal); |
| return NULL; |
| } |
| |
| /* Set lineno_count for the output sections of a COFF file. */ |
| |
| int |
| coff_count_linenumbers (bfd *abfd) |
| { |
| unsigned int limit = bfd_get_symcount (abfd); |
| unsigned int i; |
| int total = 0; |
| asymbol **p; |
| asection *s; |
| |
| if (limit == 0) |
| { |
| /* This may be from the backend linker, in which case the |
| lineno_count in the sections is correct. */ |
| for (s = abfd->sections; s != NULL; s = s->next) |
| total += s->lineno_count; |
| return total; |
| } |
| |
| for (s = abfd->sections; s != NULL; s = s->next) |
| BFD_ASSERT (s->lineno_count == 0); |
| |
| for (p = abfd->outsymbols, i = 0; i < limit; i++, p++) |
| { |
| asymbol *q_maybe = *p; |
| |
| if (bfd_asymbol_bfd (q_maybe) != NULL |
| && bfd_family_coff (bfd_asymbol_bfd (q_maybe))) |
| { |
| coff_symbol_type *q = coffsymbol (q_maybe); |
| |
| /* The AIX 4.1 compiler can sometimes generate line numbers |
| attached to debugging symbols. We try to simply ignore |
| those here. */ |
| if (q->lineno != NULL |
| && q->symbol.section->owner != NULL) |
| { |
| /* This symbol has line numbers. Increment the owning |
| section's linenumber count. */ |
| alent *l = q->lineno; |
| |
| do |
| { |
| asection * sec = q->symbol.section->output_section; |
| |
| /* Do not try to update fields in read-only sections. */ |
| if (! bfd_is_const_section (sec)) |
| sec->lineno_count ++; |
| |
| ++total; |
| ++l; |
| } |
| while (l->line_number != 0); |
| } |
| } |
| } |
| |
| return total; |
| } |
| |
| static void |
| fixup_symbol_value (bfd *abfd, |
| coff_symbol_type *coff_symbol_ptr, |
| struct internal_syment *syment) |
| { |
| /* Normalize the symbol flags. */ |
| if (coff_symbol_ptr->symbol.section |
| && bfd_is_com_section (coff_symbol_ptr->symbol.section)) |
| { |
| /* A common symbol is undefined with a value. */ |
| syment->n_scnum = N_UNDEF; |
| syment->n_value = coff_symbol_ptr->symbol.value; |
| } |
| else if ((coff_symbol_ptr->symbol.flags & BSF_DEBUGGING) != 0 |
| && (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING_RELOC) == 0) |
| { |
| syment->n_value = coff_symbol_ptr->symbol.value; |
| } |
| else if (bfd_is_und_section (coff_symbol_ptr->symbol.section)) |
| { |
| syment->n_scnum = N_UNDEF; |
| syment->n_value = 0; |
| } |
| /* FIXME: Do we need to handle the absolute section here? */ |
| else |
| { |
| if (coff_symbol_ptr->symbol.section) |
| { |
| syment->n_scnum = |
| coff_symbol_ptr->symbol.section->output_section->target_index; |
| |
| syment->n_value = (coff_symbol_ptr->symbol.value |
| + coff_symbol_ptr->symbol.section->output_offset); |
| if (! obj_pe (abfd)) |
| { |
| syment->n_value += (syment->n_sclass == C_STATLAB) |
| ? coff_symbol_ptr->symbol.section->output_section->lma |
| : coff_symbol_ptr->symbol.section->output_section->vma; |
| } |
| } |
| else |
| { |
| BFD_ASSERT (0); |
| /* This can happen, but I don't know why yet (steve@cygnus.com) */ |
| syment->n_scnum = N_ABS; |
| syment->n_value = coff_symbol_ptr->symbol.value; |
| } |
| } |
| } |
| |
| /* Run through all the symbols in the symbol table and work out what |
| their indexes into the symbol table will be when output. |
| |
| Coff requires that each C_FILE symbol points to the next one in the |
| chain, and that the last one points to the first external symbol. We |
| do that here too. */ |
| |
| bool |
| coff_renumber_symbols (bfd *bfd_ptr, int *first_undef) |
| { |
| unsigned int symbol_count = bfd_get_symcount (bfd_ptr); |
| asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols; |
| unsigned int native_index = 0; |
| struct internal_syment *last_file = NULL; |
| unsigned int symbol_index; |
| |
| /* COFF demands that undefined symbols come after all other symbols. |
| Since we don't need to impose this extra knowledge on all our |
| client programs, deal with that here. Sort the symbol table; |
| just move the undefined symbols to the end, leaving the rest |
| alone. The O'Reilly book says that defined global symbols come |
| at the end before the undefined symbols, so we do that here as |
| well. */ |
| /* @@ Do we have some condition we could test for, so we don't always |
| have to do this? I don't think relocatability is quite right, but |
| I'm not certain. [raeburn:19920508.1711EST] */ |
| { |
| asymbol **newsyms; |
| unsigned int i; |
| bfd_size_type amt; |
| |
| amt = sizeof (asymbol *) * ((bfd_size_type) symbol_count + 1); |
| newsyms = (asymbol **) bfd_alloc (bfd_ptr, amt); |
| if (!newsyms) |
| return false; |
| bfd_ptr->outsymbols = newsyms; |
| for (i = 0; i < symbol_count; i++) |
| if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) != 0 |
| || (!bfd_is_und_section (symbol_ptr_ptr[i]->section) |
| && !bfd_is_com_section (symbol_ptr_ptr[i]->section) |
| && ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) != 0 |
| || ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK)) |
| == 0)))) |
| *newsyms++ = symbol_ptr_ptr[i]; |
| |
| for (i = 0; i < symbol_count; i++) |
| if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0 |
| && !bfd_is_und_section (symbol_ptr_ptr[i]->section) |
| && (bfd_is_com_section (symbol_ptr_ptr[i]->section) |
| || ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) == 0 |
| && ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK)) |
| != 0)))) |
| *newsyms++ = symbol_ptr_ptr[i]; |
| |
| *first_undef = newsyms - bfd_ptr->outsymbols; |
| |
| for (i = 0; i < symbol_count; i++) |
| if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0 |
| && bfd_is_und_section (symbol_ptr_ptr[i]->section)) |
| *newsyms++ = symbol_ptr_ptr[i]; |
| *newsyms = (asymbol *) NULL; |
| symbol_ptr_ptr = bfd_ptr->outsymbols; |
| } |
| |
| for (symbol_index = 0; symbol_index < symbol_count; symbol_index++) |
| { |
| coff_symbol_type *coff_symbol_ptr; |
| |
| coff_symbol_ptr = coff_symbol_from (symbol_ptr_ptr[symbol_index]); |
| symbol_ptr_ptr[symbol_index]->udata.i = symbol_index; |
| if (coff_symbol_ptr && coff_symbol_ptr->native) |
| { |
| combined_entry_type *s = coff_symbol_ptr->native; |
| int i; |
| |
| BFD_ASSERT (s->is_sym); |
| if (s->u.syment.n_sclass == C_FILE) |
| { |
| if (last_file != NULL) |
| last_file->n_value = native_index; |
| last_file = &(s->u.syment); |
| } |
| else |
| /* Modify the symbol values according to their section and |
| type. */ |
| fixup_symbol_value (bfd_ptr, coff_symbol_ptr, &(s->u.syment)); |
| |
| for (i = 0; i < s->u.syment.n_numaux + 1; i++) |
| s[i].offset = native_index++; |
| } |
| else |
| native_index++; |
| } |
| |
| obj_conv_table_size (bfd_ptr) = native_index; |
| |
| return true; |
| } |
| |
| /* Run thorough the symbol table again, and fix it so that all |
| pointers to entries are changed to the entries' index in the output |
| symbol table. */ |
| |
| void |
| coff_mangle_symbols (bfd *bfd_ptr) |
| { |
| unsigned int symbol_count = bfd_get_symcount (bfd_ptr); |
| asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols; |
| unsigned int symbol_index; |
| |
| for (symbol_index = 0; symbol_index < symbol_count; symbol_index++) |
| { |
| coff_symbol_type *coff_symbol_ptr; |
| |
| coff_symbol_ptr = coff_symbol_from (symbol_ptr_ptr[symbol_index]); |
| if (coff_symbol_ptr && coff_symbol_ptr->native) |
| { |
| int i; |
| combined_entry_type *s = coff_symbol_ptr->native; |
| |
| BFD_ASSERT (s->is_sym); |
| if (s->fix_value) |
| { |
| /* FIXME: We should use a union here. */ |
| s->u.syment.n_value = |
| (uintptr_t) ((combined_entry_type *) |
| (uintptr_t) s->u.syment.n_value)->offset; |
| s->fix_value = 0; |
| } |
| if (s->fix_line) |
| { |
| /* The value is the offset into the line number entries |
| for the symbol's section. On output, the symbol's |
| section should be N_DEBUG. */ |
| s->u.syment.n_value = |
| (coff_symbol_ptr->symbol.section->output_section->line_filepos |
| + s->u.syment.n_value * bfd_coff_linesz (bfd_ptr)); |
| coff_symbol_ptr->symbol.section = |
| coff_section_from_bfd_index (bfd_ptr, N_DEBUG); |
| BFD_ASSERT (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING); |
| } |
| for (i = 0; i < s->u.syment.n_numaux; i++) |
| { |
| combined_entry_type *a = s + i + 1; |
| |
| BFD_ASSERT (! a->is_sym); |
| if (a->fix_tag) |
| { |
| a->u.auxent.x_sym.x_tagndx.u32 = |
| a->u.auxent.x_sym.x_tagndx.p->offset; |
| a->fix_tag = 0; |
| } |
| if (a->fix_end) |
| { |
| a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.u32 = |
| a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p->offset; |
| a->fix_end = 0; |
| } |
| if (a->fix_scnlen) |
| { |
| a->u.auxent.x_csect.x_scnlen.u64 = |
| a->u.auxent.x_csect.x_scnlen.p->offset; |
| a->fix_scnlen = 0; |
| } |
| } |
| } |
| } |
| } |
| |
| static bool |
| coff_write_auxent_fname (bfd *abfd, |
| char *str, |
| union internal_auxent *auxent, |
| struct bfd_strtab_hash *strtab, |
| bool hash) |
| { |
| unsigned int str_length = strlen (str); |
| unsigned int filnmlen = bfd_coff_filnmlen (abfd); |
| |
| if (bfd_coff_long_filenames (abfd)) |
| { |
| if (str_length <= filnmlen) |
| strncpy (auxent->x_file.x_n.x_fname, str, filnmlen); |
| else |
| { |
| bfd_size_type indx = _bfd_stringtab_add (strtab, str, hash, false); |
| |
| if (indx == (bfd_size_type) -1) |
| return false; |
| |
| auxent->x_file.x_n.x_n.x_offset = STRING_SIZE_SIZE + indx; |
| auxent->x_file.x_n.x_n.x_zeroes = 0; |
| } |
| } |
| else |
| { |
| strncpy (auxent->x_file.x_n.x_fname, str, filnmlen); |
| if (str_length > filnmlen) |
| str[filnmlen] = '\0'; |
| } |
| |
| return true; |
| } |
| |
| static bool |
| coff_fix_symbol_name (bfd *abfd, |
| asymbol *symbol, |
| combined_entry_type *native, |
| struct bfd_strtab_hash *strtab, |
| bool hash, |
| asection **debug_string_section_p, |
| bfd_size_type *debug_string_size_p) |
| { |
| unsigned int name_length; |
| char *name = (char *) (symbol->name); |
| bfd_size_type indx; |
| |
| if (name == NULL) |
| { |
| /* COFF symbols always have names, so we'll make one up. */ |
| symbol->name = "strange"; |
| name = (char *) symbol->name; |
| } |
| name_length = strlen (name); |
| |
| BFD_ASSERT (native->is_sym); |
| if (native->u.syment.n_sclass == C_FILE |
| && native->u.syment.n_numaux > 0) |
| { |
| if (bfd_coff_force_symnames_in_strings (abfd)) |
| { |
| indx = _bfd_stringtab_add (strtab, ".file", hash, false); |
| if (indx == (bfd_size_type) -1) |
| return false; |
| |
| native->u.syment._n._n_n._n_offset = STRING_SIZE_SIZE + indx; |
| native->u.syment._n._n_n._n_zeroes = 0; |
| } |
| else |
| strncpy (native->u.syment._n._n_name, ".file", SYMNMLEN); |
| |
| BFD_ASSERT (! (native + 1)->is_sym); |
| if (!coff_write_auxent_fname (abfd, name, &(native + 1)->u.auxent, |
| strtab, hash)) |
| return false; |
| } |
| else |
| { |
| if (name_length <= SYMNMLEN && !bfd_coff_force_symnames_in_strings (abfd)) |
| /* This name will fit into the symbol neatly. */ |
| strncpy (native->u.syment._n._n_name, symbol->name, SYMNMLEN); |
| |
| else if (!bfd_coff_symname_in_debug (abfd, &native->u.syment)) |
| { |
| indx = _bfd_stringtab_add (strtab, name, hash, false); |
| if (indx == (bfd_size_type) -1) |
| return false; |
| |
| native->u.syment._n._n_n._n_offset = STRING_SIZE_SIZE + indx; |
| native->u.syment._n._n_n._n_zeroes = 0; |
| } |
| else |
| { |
| file_ptr filepos; |
| bfd_byte buf[4]; |
| int prefix_len = bfd_coff_debug_string_prefix_length (abfd); |
| |
| /* This name should be written into the .debug section. For |
| some reason each name is preceded by a two byte length |
| and also followed by a null byte. FIXME: We assume that |
| the .debug section has already been created, and that it |
| is large enough. */ |
| if (*debug_string_section_p == (asection *) NULL) |
| *debug_string_section_p = bfd_get_section_by_name (abfd, ".debug"); |
| filepos = bfd_tell (abfd); |
| if (prefix_len == 4) |
| bfd_put_32 (abfd, (bfd_vma) (name_length + 1), buf); |
| else |
| bfd_put_16 (abfd, (bfd_vma) (name_length + 1), buf); |
| |
| if (!bfd_set_section_contents (abfd, |
| *debug_string_section_p, |
| (void *) buf, |
| (file_ptr) *debug_string_size_p, |
| (bfd_size_type) prefix_len) |
| || !bfd_set_section_contents (abfd, |
| *debug_string_section_p, |
| (void *) symbol->name, |
| (file_ptr) (*debug_string_size_p |
| + prefix_len), |
| (bfd_size_type) name_length + 1)) |
| abort (); |
| if (bfd_seek (abfd, filepos, SEEK_SET) != 0) |
| abort (); |
| native->u.syment._n._n_n._n_offset = |
| *debug_string_size_p + prefix_len; |
| native->u.syment._n._n_n._n_zeroes = 0; |
| *debug_string_size_p += name_length + 1 + prefix_len; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* We need to keep track of the symbol index so that when we write out |
| the relocs we can get the index for a symbol. This method is a |
| hack. FIXME. */ |
| |
| #define set_index(symbol, idx) ((symbol)->udata.i = (idx)) |
| |
| /* Write a symbol out to a COFF file. */ |
| |
| static bool |
| coff_write_symbol (bfd *abfd, |
| asymbol *symbol, |
| combined_entry_type *native, |
| bfd_vma *written, |
| struct bfd_strtab_hash *strtab, |
| bool hash, |
| asection **debug_string_section_p, |
| bfd_size_type *debug_string_size_p) |
| { |
| unsigned int numaux = native->u.syment.n_numaux; |
| int type = native->u.syment.n_type; |
| int n_sclass = (int) native->u.syment.n_sclass; |
| asection *output_section = symbol->section->output_section |
| ? symbol->section->output_section |
| : symbol->section; |
| void * buf; |
| bfd_size_type symesz; |
| |
| BFD_ASSERT (native->is_sym); |
| |
| if (native->u.syment.n_sclass == C_FILE) |
| symbol->flags |= BSF_DEBUGGING; |
| |
| if (symbol->flags & BSF_DEBUGGING |
| && bfd_is_abs_section (symbol->section)) |
| native->u.syment.n_scnum = N_DEBUG; |
| |
| else if (bfd_is_abs_section (symbol->section)) |
| native->u.syment.n_scnum = N_ABS; |
| |
| else if (bfd_is_und_section (symbol->section)) |
| native->u.syment.n_scnum = N_UNDEF; |
| |
| else |
| native->u.syment.n_scnum = |
| output_section->target_index; |
| |
| if (!coff_fix_symbol_name (abfd, symbol, native, strtab, hash, |
| debug_string_section_p, debug_string_size_p)) |
| return false; |
| |
| symesz = bfd_coff_symesz (abfd); |
| buf = bfd_alloc (abfd, symesz); |
| if (!buf) |
| return false; |
| bfd_coff_swap_sym_out (abfd, &native->u.syment, buf); |
| if (bfd_write (buf, symesz, abfd) != symesz) |
| return false; |
| bfd_release (abfd, buf); |
| |
| if (native->u.syment.n_numaux > 0) |
| { |
| bfd_size_type auxesz; |
| unsigned int j; |
| |
| auxesz = bfd_coff_auxesz (abfd); |
| buf = bfd_alloc (abfd, auxesz); |
| if (!buf) |
| return false; |
| for (j = 0; j < native->u.syment.n_numaux; j++) |
| { |
| BFD_ASSERT (! (native + j + 1)->is_sym); |
| |
| /* Adjust auxent only if this isn't the filename |
| auxiliary entry. */ |
| if (native->u.syment.n_sclass == C_FILE |
| && (native + j + 1)->u.auxent.x_file.x_ftype |
| && (native + j + 1)->extrap) |
| coff_write_auxent_fname (abfd, (char *) (native + j + 1)->extrap, |
| &(native + j + 1)->u.auxent, strtab, hash); |
| |
| bfd_coff_swap_aux_out (abfd, |
| &((native + j + 1)->u.auxent), |
| type, n_sclass, (int) j, |
| native->u.syment.n_numaux, |
| buf); |
| if (bfd_write (buf, auxesz, abfd) != auxesz) |
| return false; |
| } |
| bfd_release (abfd, buf); |
| } |
| |
| /* Store the index for use when we write out the relocs. */ |
| set_index (symbol, *written); |
| |
| *written += numaux + 1; |
| return true; |
| } |
| |
| /* Write out a symbol to a COFF file that does not come from a COFF |
| file originally. This symbol may have been created by the linker, |
| or we may be linking a non COFF file to a COFF file. */ |
| |
| bool |
| coff_write_alien_symbol (bfd *abfd, |
| asymbol *symbol, |
| struct internal_syment *isym, |
| bfd_vma *written, |
| struct bfd_strtab_hash *strtab, |
| bool hash, |
| asection **debug_string_section_p, |
| bfd_size_type *debug_string_size_p) |
| { |
| combined_entry_type *native; |
| combined_entry_type dummy[2]; |
| asection *output_section = symbol->section->output_section |
| ? symbol->section->output_section |
| : symbol->section; |
| struct bfd_link_info *link_info = coff_data (abfd)->link_info; |
| bool ret; |
| |
| if ((!link_info || link_info->strip_discarded) |
| && !bfd_is_abs_section (symbol->section) |
| && symbol->section->output_section == bfd_abs_section_ptr) |
| { |
| symbol->name = ""; |
| if (isym != NULL) |
| memset (isym, 0, sizeof (*isym)); |
| return true; |
| } |
| memset (dummy, 0, sizeof dummy); |
| native = dummy; |
| native->is_sym = true; |
| native[1].is_sym = false; |
| native->u.syment.n_type = T_NULL; |
| native->u.syment.n_flags = 0; |
| native->u.syment.n_numaux = 0; |
| if (bfd_is_und_section (symbol->section)) |
| { |
| native->u.syment.n_scnum = N_UNDEF; |
| native->u.syment.n_value = symbol->value; |
| } |
| else if (bfd_is_com_section (symbol->section)) |
| { |
| native->u.syment.n_scnum = N_UNDEF; |
| native->u.syment.n_value = symbol->value; |
| } |
| else if (symbol->flags & BSF_FILE) |
| { |
| native->u.syment.n_scnum = N_DEBUG; |
| native->u.syment.n_numaux = 1; |
| } |
| else if (symbol->flags & BSF_DEBUGGING) |
| { |
| /* There isn't much point to writing out a debugging symbol |
| unless we are prepared to convert it into COFF debugging |
| format. So, we just ignore them. We must clobber the symbol |
| name to keep it from being put in the string table. */ |
| symbol->name = ""; |
| if (isym != NULL) |
| memset (isym, 0, sizeof (*isym)); |
| return true; |
| } |
| else |
| { |
| native->u.syment.n_scnum = output_section->target_index; |
| native->u.syment.n_value = (symbol->value |
| + symbol->section->output_offset); |
| if (! obj_pe (abfd)) |
| native->u.syment.n_value += output_section->vma; |
| |
| /* Copy the any flags from the file header into the symbol. |
| FIXME: Why? */ |
| { |
| coff_symbol_type *c = coff_symbol_from (symbol); |
| if (c != (coff_symbol_type *) NULL) |
| native->u.syment.n_flags = bfd_asymbol_bfd (&c->symbol)->flags; |
| } |
| } |
| |
| native->u.syment.n_type = 0; |
| if (symbol->flags & BSF_FILE) |
| native->u.syment.n_sclass = C_FILE; |
| else if (symbol->flags & BSF_LOCAL) |
| native->u.syment.n_sclass = C_STAT; |
| else if (symbol->flags & BSF_WEAK) |
| native->u.syment.n_sclass = obj_pe (abfd) ? C_NT_WEAK : C_WEAKEXT; |
| else |
| native->u.syment.n_sclass = C_EXT; |
| |
| ret = coff_write_symbol (abfd, symbol, native, written, strtab, hash, |
| debug_string_section_p, debug_string_size_p); |
| if (isym != NULL) |
| *isym = native->u.syment; |
| return ret; |
| } |
| |
| /* Write a native symbol to a COFF file. */ |
| |
| static bool |
| coff_write_native_symbol (bfd *abfd, |
| coff_symbol_type *symbol, |
| bfd_vma *written, |
| struct bfd_strtab_hash *strtab, |
| asection **debug_string_section_p, |
| bfd_size_type *debug_string_size_p) |
| { |
| combined_entry_type *native = symbol->native; |
| alent *lineno = symbol->lineno; |
| struct bfd_link_info *link_info = coff_data (abfd)->link_info; |
| |
| if ((!link_info || link_info->strip_discarded) |
| && !bfd_is_abs_section (symbol->symbol.section) |
| && symbol->symbol.section->output_section == bfd_abs_section_ptr) |
| { |
| symbol->symbol.name = ""; |
| return true; |
| } |
| |
| BFD_ASSERT (native->is_sym); |
| /* If this symbol has an associated line number, we must store the |
| symbol index in the line number field. We also tag the auxent to |
| point to the right place in the lineno table. */ |
| if (lineno && !symbol->done_lineno && symbol->symbol.section->owner != NULL) |
| { |
| unsigned int count = 0; |
| |
| lineno[count].u.offset = *written; |
| if (native->u.syment.n_numaux) |
| { |
| union internal_auxent *a = &((native + 1)->u.auxent); |
| |
| a->x_sym.x_fcnary.x_fcn.x_lnnoptr = |
| symbol->symbol.section->output_section->moving_line_filepos; |
| } |
| |
| /* Count and relocate all other linenumbers. */ |
| count++; |
| while (lineno[count].line_number != 0) |
| { |
| lineno[count].u.offset += |
| (symbol->symbol.section->output_section->vma |
| + symbol->symbol.section->output_offset); |
| count++; |
| } |
| symbol->done_lineno = true; |
| |
| if (! bfd_is_const_section (symbol->symbol.section->output_section)) |
| symbol->symbol.section->output_section->moving_line_filepos += |
| count * bfd_coff_linesz (abfd); |
| } |
| |
| return coff_write_symbol (abfd, &(symbol->symbol), native, written, |
| strtab, true, debug_string_section_p, |
| debug_string_size_p); |
| } |
| |
| static void |
| null_error_handler (const char *fmt ATTRIBUTE_UNUSED, |
| va_list ap ATTRIBUTE_UNUSED) |
| { |
| } |
| |
| /* Write out the COFF symbols. */ |
| |
| bool |
| coff_write_symbols (bfd *abfd) |
| { |
| struct bfd_strtab_hash *strtab; |
| asection *debug_string_section; |
| bfd_size_type debug_string_size; |
| unsigned int i; |
| unsigned int limit = bfd_get_symcount (abfd); |
| bfd_vma written = 0; |
| asymbol **p; |
| |
| debug_string_section = NULL; |
| debug_string_size = 0; |
| |
| strtab = _bfd_stringtab_init (); |
| if (strtab == NULL) |
| return false; |
| |
| /* If this target supports long section names, they must be put into |
| the string table. This is supported by PE. This code must |
| handle section names just as they are handled in |
| coff_write_object_contents. This is why we pass hash as FALSE below. */ |
| if (bfd_coff_long_section_names (abfd)) |
| { |
| asection *o; |
| |
| for (o = abfd->sections; o != NULL; o = o->next) |
| if (strlen (o->name) > SCNNMLEN |
| && _bfd_stringtab_add (strtab, o->name, false, false) |
| == (bfd_size_type) -1) |
| return false; |
| } |
| |
| /* Seek to the right place. */ |
| if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0) |
| return false; |
| |
| /* Output all the symbols we have. */ |
| written = 0; |
| for (p = abfd->outsymbols, i = 0; i < limit; i++, p++) |
| { |
| asymbol *symbol = *p; |
| coff_symbol_type *c_symbol = coff_symbol_from (symbol); |
| |
| if (c_symbol == (coff_symbol_type *) NULL |
| || c_symbol->native == (combined_entry_type *) NULL) |
| { |
| if (!coff_write_alien_symbol (abfd, symbol, NULL, &written, |
| strtab, true, &debug_string_section, |
| &debug_string_size)) |
| return false; |
| } |
| else |
| { |
| if (coff_backend_info (abfd)->_bfd_coff_classify_symbol != NULL) |
| { |
| bfd_error_handler_type current_error_handler; |
| enum coff_symbol_classification sym_class; |
| unsigned char *n_sclass; |
| |
| /* Suppress error reporting by bfd_coff_classify_symbol. |
| Error messages can be generated when we are processing a local |
| symbol which has no associated section and we do not have to |
| worry about this, all we need to know is that it is local. */ |
| current_error_handler = bfd_set_error_handler (null_error_handler); |
| BFD_ASSERT (c_symbol->native->is_sym); |
| sym_class = bfd_coff_classify_symbol (abfd, |
| &c_symbol->native->u.syment); |
| (void) bfd_set_error_handler (current_error_handler); |
| |
| n_sclass = &c_symbol->native->u.syment.n_sclass; |
| |
| /* If the symbol class has been changed (eg objcopy/ld script/etc) |
| we cannot retain the existing sclass from the original symbol. |
| Weak symbols only have one valid sclass, so just set it always. |
| If it is not local class and should be, set it C_STAT. |
| If it is global and not classified as global, or if it is |
| weak (which is also classified as global), set it C_EXT. */ |
| |
| if (symbol->flags & BSF_WEAK) |
| *n_sclass = obj_pe (abfd) ? C_NT_WEAK : C_WEAKEXT; |
| else if (symbol->flags & BSF_LOCAL && sym_class != COFF_SYMBOL_LOCAL) |
| *n_sclass = C_STAT; |
| else if (symbol->flags & BSF_GLOBAL |
| && (sym_class != COFF_SYMBOL_GLOBAL |
| #ifdef COFF_WITH_PE |
| || *n_sclass == C_NT_WEAK |
| #endif |
| || *n_sclass == C_WEAKEXT)) |
| c_symbol->native->u.syment.n_sclass = C_EXT; |
| } |
| |
| if (!coff_write_native_symbol (abfd, c_symbol, &written, |
| strtab, &debug_string_section, |
| &debug_string_size)) |
| return false; |
| } |
| } |
| |
| obj_raw_syment_count (abfd) = written; |
| |
| /* Now write out strings. |
| |
| We would normally not write anything here if there are no strings, but |
| we'll write out 4 so that any stupid coff reader which tries to read the |
| string table even when there isn't one won't croak. */ |
| { |
| bfd_byte buffer[STRING_SIZE_SIZE]; |
| |
| #if STRING_SIZE_SIZE == 4 |
| H_PUT_32 (abfd, _bfd_stringtab_size (strtab) + STRING_SIZE_SIZE, buffer); |
| #else |
| #error Change H_PUT_32 |
| #endif |
| if (bfd_write (buffer, sizeof (buffer), abfd) != sizeof (buffer)) |
| return false; |
| |
| if (! _bfd_stringtab_emit (abfd, strtab)) |
| return false; |
| } |
| |
| _bfd_stringtab_free (strtab); |
| |
| /* Make sure the .debug section was created to be the correct size. |
| We should create it ourselves on the fly, but we don't because |
| BFD won't let us write to any section until we know how large all |
| the sections are. We could still do it by making another pass |
| over the symbols. FIXME. */ |
| BFD_ASSERT (debug_string_size == 0 |
| || (debug_string_section != (asection *) NULL |
| && (BFD_ALIGN (debug_string_size, |
| 1 << debug_string_section->alignment_power) |
| == debug_string_section->size))); |
| |
| return true; |
| } |
| |
| bool |
| coff_write_linenumbers (bfd *abfd) |
| { |
| asection *s; |
| bfd_size_type linesz; |
| void * buff; |
| |
| linesz = bfd_coff_linesz (abfd); |
| buff = bfd_alloc (abfd, linesz); |
| if (!buff) |
| return false; |
| for (s = abfd->sections; s != (asection *) NULL; s = s->next) |
| { |
| if (s->lineno_count) |
| { |
| asymbol **q = abfd->outsymbols; |
| if (bfd_seek (abfd, s->line_filepos, SEEK_SET) != 0) |
| return false; |
| /* Find all the linenumbers in this section. */ |
| while (*q) |
| { |
| asymbol *p = *q; |
| if (p->section->output_section == s) |
| { |
| alent *l = |
| BFD_SEND (bfd_asymbol_bfd (p), _get_lineno, |
| (bfd_asymbol_bfd (p), p)); |
| if (l) |
| { |
| /* Found a linenumber entry, output. */ |
| struct internal_lineno out; |
| |
| memset ((void *) & out, 0, sizeof (out)); |
| out.l_lnno = 0; |
| out.l_addr.l_symndx = l->u.offset; |
| bfd_coff_swap_lineno_out (abfd, &out, buff); |
| if (bfd_write (buff, linesz, abfd) != linesz) |
| return false; |
| l++; |
| while (l->line_number) |
| { |
| out.l_lnno = l->line_number; |
| out.l_addr.l_symndx = l->u.offset; |
| bfd_coff_swap_lineno_out (abfd, &out, buff); |
| if (bfd_write (buff, linesz, abfd) != linesz) |
| return false; |
| l++; |
| } |
| } |
| } |
| q++; |
| } |
| } |
| } |
| bfd_release (abfd, buff); |
| return true; |
| } |
| |
| alent * |
| coff_get_lineno (bfd *ignore_abfd ATTRIBUTE_UNUSED, asymbol *symbol) |
| { |
| return coffsymbol (symbol)->lineno; |
| } |
| |
| /* This function transforms the offsets into the symbol table into |
| pointers to syments. */ |
| |
| static void |
| coff_pointerize_aux (bfd *abfd, |
| combined_entry_type *table_base, |
| combined_entry_type *symbol, |
| unsigned int indaux, |
| combined_entry_type *auxent) |
| { |
| unsigned int type = symbol->u.syment.n_type; |
| unsigned int n_sclass = symbol->u.syment.n_sclass; |
| |
| BFD_ASSERT (symbol->is_sym); |
| if (coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook) |
| { |
| if ((*coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook) |
| (abfd, table_base, symbol, indaux, auxent)) |
| return; |
| } |
| |
| /* Don't bother if this is a file or a section. */ |
| if (n_sclass == C_STAT && type == T_NULL) |
| return; |
| if (n_sclass == C_FILE) |
| return; |
| if (n_sclass == C_DWARF) |
| return; |
| |
| BFD_ASSERT (! auxent->is_sym); |
| /* Otherwise patch up. */ |
| #define N_TMASK coff_data (abfd)->local_n_tmask |
| #define N_BTSHFT coff_data (abfd)->local_n_btshft |
| |
| if ((ISFCN (type) || ISTAG (n_sclass) || n_sclass == C_BLOCK |
| || n_sclass == C_FCN) |
| && auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.u32 > 0 |
| && (auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.u32 |
| < obj_raw_syment_count (abfd))) |
| { |
| auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p = |
| table_base + auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.u32; |
| auxent->fix_end = 1; |
| } |
| |
| /* A negative tagndx is meaningless, but the SCO 3.2v4 cc can |
| generate one, so we must be careful to ignore it. */ |
| if (auxent->u.auxent.x_sym.x_tagndx.u32 < obj_raw_syment_count (abfd)) |
| { |
| auxent->u.auxent.x_sym.x_tagndx.p = |
| table_base + auxent->u.auxent.x_sym.x_tagndx.u32; |
| auxent->fix_tag = 1; |
| } |
| } |
| |
| /* Allocate space for the ".debug" section, and read it. |
| We did not read the debug section until now, because |
| we didn't want to go to the trouble until someone needed it. */ |
| |
| static char * |
| build_debug_section (bfd *abfd, asection ** sect_return) |
| { |
| char *debug_section; |
| file_ptr position; |
| bfd_size_type sec_size; |
| |
| asection *sect = bfd_get_section_by_name (abfd, ".debug"); |
| |
| if (!sect) |
| { |
| bfd_set_error (bfd_error_no_debug_section); |
| return NULL; |
| } |
| |
| /* Seek to the beginning of the `.debug' section and read it. |
| Save the current position first; it is needed by our caller. |
| Then read debug section and reset the file pointer. */ |
| |
| position = bfd_tell (abfd); |
| if (bfd_seek (abfd, sect->filepos, SEEK_SET) != 0) |
| return NULL; |
| |
| sec_size = sect->size; |
| debug_section = (char *) _bfd_alloc_and_read (abfd, sec_size + 1, sec_size); |
| if (debug_section == NULL) |
| return NULL; |
| debug_section[sec_size] = 0; |
| |
| if (bfd_seek (abfd, position, SEEK_SET) != 0) |
| return NULL; |
| |
| * sect_return = sect; |
| return debug_section; |
| } |
| |
| /* Return a pointer to a malloc'd copy of 'name'. 'name' may not be |
| \0-terminated, but will not exceed 'maxlen' characters. The copy *will* |
| be \0-terminated. */ |
| |
| static char * |
| copy_name (bfd *abfd, char *name, size_t maxlen) |
| { |
| size_t len; |
| char *newname; |
| |
| for (len = 0; len < maxlen; ++len) |
| if (name[len] == '\0') |
| break; |
| |
| if ((newname = (char *) bfd_alloc (abfd, (bfd_size_type) len + 1)) == NULL) |
| return NULL; |
| |
| strncpy (newname, name, len); |
| newname[len] = '\0'; |
| return newname; |
| } |
| |
| /* Read in the external symbols. */ |
| |
| bool |
| _bfd_coff_get_external_symbols (bfd *abfd) |
| { |
| size_t symesz; |
| size_t size; |
| void * syms; |
| ufile_ptr filesize; |
| |
| if (obj_coff_external_syms (abfd) != NULL) |
| return true; |
| |
| symesz = bfd_coff_symesz (abfd); |
| if (_bfd_mul_overflow (obj_raw_syment_count (abfd), symesz, &size)) |
| { |
| bfd_set_error (bfd_error_file_truncated); |
| return false; |
| } |
| |
| if (size == 0) |
| return true; |
| |
| filesize = bfd_get_file_size (abfd); |
| if (filesize != 0 |
| && ((ufile_ptr) obj_sym_filepos (abfd) > filesize |
| || size > filesize - obj_sym_filepos (abfd))) |
| { |
| bfd_set_error (bfd_error_file_truncated); |
| return false; |
| } |
| |
| if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0) |
| return false; |
| syms = _bfd_malloc_and_read (abfd, size, size); |
| obj_coff_external_syms (abfd) = syms; |
| return syms != NULL; |
| } |
| |
| /* Read in the external strings. The strings are not loaded until |
| they are needed. This is because we have no simple way of |
| detecting a missing string table in an archive. If the strings |
| are loaded then the STRINGS and STRINGS_LEN fields in the |
| coff_tdata structure will be set. */ |
| |
| const char * |
| _bfd_coff_read_string_table (bfd *abfd) |
| { |
| char extstrsize[STRING_SIZE_SIZE]; |
| bfd_size_type strsize; |
| char *strings; |
| ufile_ptr pos; |
| ufile_ptr filesize; |
| size_t symesz; |
| size_t size; |
| |
| if (obj_coff_strings (abfd) != NULL) |
| return obj_coff_strings (abfd); |
| |
| if (obj_sym_filepos (abfd) == 0) |
| { |
| bfd_set_error (bfd_error_no_symbols); |
| return NULL; |
| } |
| |
| symesz = bfd_coff_symesz (abfd); |
| pos = obj_sym_filepos (abfd); |
| if (_bfd_mul_overflow (obj_raw_syment_count (abfd), symesz, &size) |
| || pos + size < pos) |
| { |
| bfd_set_error (bfd_error_file_truncated); |
| return NULL; |
| } |
| |
| if (bfd_seek (abfd, pos + size, SEEK_SET) != 0) |
| return NULL; |
| |
| if (bfd_read (extstrsize, sizeof extstrsize, abfd) != sizeof extstrsize) |
| { |
| if (bfd_get_error () != bfd_error_file_truncated) |
| return NULL; |
| |
| /* There is no string table. */ |
| strsize = STRING_SIZE_SIZE; |
| } |
| else |
| { |
| #if STRING_SIZE_SIZE == 4 |
| strsize = H_GET_32 (abfd, extstrsize); |
| #else |
| #error Change H_GET_32 |
| #endif |
| } |
| |
| filesize = bfd_get_file_size (abfd); |
| if (strsize < STRING_SIZE_SIZE |
| || (filesize != 0 && strsize > filesize)) |
| { |
| _bfd_error_handler |
| /* xgettext: c-format */ |
| (_("%pB: bad string table size %" PRIu64), abfd, (uint64_t) strsize); |
| bfd_set_error (bfd_error_bad_value); |
| return NULL; |
| } |
| |
| strings = (char *) bfd_malloc (strsize + 1); |
| if (strings == NULL) |
| return NULL; |
| |
| /* PR 17521 file: 079-54929-0.004. |
| A corrupt file could contain an index that points into the first |
| STRING_SIZE_SIZE bytes of the string table, so make sure that |
| they are zero. */ |
| memset (strings, 0, STRING_SIZE_SIZE); |
| |
| if (bfd_read (strings + STRING_SIZE_SIZE, strsize - STRING_SIZE_SIZE, abfd) |
| != strsize - STRING_SIZE_SIZE) |
| { |
| free (strings); |
| return NULL; |
| } |
| |
| obj_coff_strings (abfd) = strings; |
| obj_coff_strings_len (abfd) = strsize; |
| /* Terminate the string table, just in case. */ |
| strings[strsize] = 0; |
| return strings; |
| } |
| |
| /* Free up the external symbols and strings read from a COFF file. */ |
| |
| bool |
| _bfd_coff_free_symbols (bfd *abfd) |
| { |
| if (! bfd_family_coff (abfd)) |
| return false; |
| |
| if (obj_coff_external_syms (abfd) != NULL |
| && ! obj_coff_keep_syms (abfd)) |
| { |
| free (obj_coff_external_syms (abfd)); |
| obj_coff_external_syms (abfd) = NULL; |
| } |
| |
| if (obj_coff_strings (abfd) != NULL |
| && ! obj_coff_keep_strings (abfd)) |
| { |
| free (obj_coff_strings (abfd)); |
| obj_coff_strings (abfd) = NULL; |
| obj_coff_strings_len (abfd) = 0; |
| } |
| |
| return true; |
| } |
| |
| /* Read a symbol table into freshly bfd_allocated memory, swap it, and |
| knit the symbol names into a normalized form. By normalized here I |
| mean that all symbols have an n_offset pointer that points to a null- |
| terminated string. */ |
| |
| combined_entry_type * |
| coff_get_normalized_symtab (bfd *abfd) |
| { |
| combined_entry_type *internal; |
| combined_entry_type *internal_ptr; |
| size_t symesz; |
| char *raw_src; |
| char *raw_end; |
| const char *string_table = NULL; |
| asection * debug_sec = NULL; |
| char *debug_sec_data = NULL; |
| bfd_size_type size; |
| |
| if (obj_raw_syments (abfd) != NULL) |
| return obj_raw_syments (abfd); |
| |
| if (! _bfd_coff_get_external_symbols (abfd)) |
| return NULL; |
| |
| size = obj_raw_syment_count (abfd); |
| /* Check for integer overflow. */ |
| if (size > (bfd_size_type) -1 / sizeof (combined_entry_type)) |
| return NULL; |
| size *= sizeof (combined_entry_type); |
| internal = (combined_entry_type *) bfd_zalloc (abfd, size); |
| if (internal == NULL && size != 0) |
| return NULL; |
| |
| raw_src = (char *) obj_coff_external_syms (abfd); |
| |
| /* Mark the end of the symbols. */ |
| symesz = bfd_coff_symesz (abfd); |
| raw_end = PTR_ADD (raw_src, obj_raw_syment_count (abfd) * symesz); |
| |
| /* FIXME SOMEDAY. A string table size of zero is very weird, but |
| probably possible. If one shows up, it will probably kill us. */ |
| |
| /* Swap all the raw entries. */ |
| for (internal_ptr = internal; |
| raw_src < raw_end; |
| raw_src += symesz, internal_ptr++) |
| { |
| unsigned int i; |
| |
| bfd_coff_swap_sym_in (abfd, (void *) raw_src, |
| (void *) & internal_ptr->u.syment); |
| internal_ptr->is_sym = true; |
| combined_entry_type *sym = internal_ptr; |
| |
| /* PR 17512: Prevent buffer overrun. */ |
| if (sym->u.syment.n_numaux > ((raw_end - 1) - raw_src) / symesz) |
| return NULL; |
| |
| for (i = 0; i < sym->u.syment.n_numaux; i++) |
| { |
| internal_ptr++; |
| raw_src += symesz; |
| |
| bfd_coff_swap_aux_in (abfd, (void *) raw_src, |
| sym->u.syment.n_type, |
| sym->u.syment.n_sclass, |
| (int) i, sym->u.syment.n_numaux, |
| &(internal_ptr->u.auxent)); |
| |
| internal_ptr->is_sym = false; |
| coff_pointerize_aux (abfd, internal, sym, i, internal_ptr); |
| } |
| |
| if (sym->u.syment.n_sclass == C_FILE |
| && sym->u.syment.n_numaux > 0) |
| { |
| combined_entry_type * aux = sym + 1; |
| |
| /* Make a file symbol point to the name in the auxent, since |
| the text ".file" is redundant. */ |
| BFD_ASSERT (! aux->is_sym); |
| |
| if (aux->u.auxent.x_file.x_n.x_n.x_zeroes == 0) |
| { |
| /* The filename is a long one, point into the string table. */ |
| if (string_table == NULL) |
| { |
| string_table = _bfd_coff_read_string_table (abfd); |
| if (string_table == NULL) |
| return NULL; |
| } |
| |
| if ((bfd_size_type) aux->u.auxent.x_file.x_n.x_n.x_offset |
| >= obj_coff_strings_len (abfd)) |
| sym->u.syment._n._n_n._n_offset = |
| (uintptr_t) _("<corrupt>"); |
| else |
| sym->u.syment._n._n_n._n_offset = |
| (uintptr_t) (string_table |
| + aux->u.auxent.x_file.x_n.x_n.x_offset); |
| } |
| else |
| { |
| /* Ordinary short filename, put into memory anyway. The |
| Microsoft PE tools sometimes store a filename in |
| multiple AUX entries. */ |
| size_t len; |
| char *src; |
| if (sym->u.syment.n_numaux > 1 && obj_pe (abfd)) |
| { |
| len = sym->u.syment.n_numaux * symesz; |
| src = raw_src - (len - symesz); |
| } |
| else |
| { |
| len = bfd_coff_filnmlen (abfd); |
| src = aux->u.auxent.x_file.x_n.x_fname; |
| } |
| sym->u.syment._n._n_n._n_offset = |
| (uintptr_t) copy_name (abfd, src, len); |
| } |
| |
| /* Normalize other strings available in C_FILE aux entries. */ |
| if (!obj_pe (abfd)) |
| for (int numaux = 1; |
| numaux < sym->u.syment.n_numaux; |
| numaux++) |
| { |
| aux = sym + numaux + 1; |
| BFD_ASSERT (! aux->is_sym); |
| |
| if (aux->u.auxent.x_file.x_n.x_n.x_zeroes == 0) |
| { |
| /* The string information is a long one, point |
| into the string table. */ |
| if (string_table == NULL) |
| { |
| string_table = _bfd_coff_read_string_table (abfd); |
| if (string_table == NULL) |
| return NULL; |
| } |
| |
| if ((bfd_size_type) aux->u.auxent.x_file.x_n.x_n.x_offset |
| >= obj_coff_strings_len (abfd)) |
| aux->u.auxent.x_file.x_n.x_n.x_offset = |
| (uintptr_t) _("<corrupt>"); |
| else |
| aux->u.auxent.x_file.x_n.x_n.x_offset = |
| (uintptr_t) (string_table |
| + aux->u.auxent.x_file.x_n.x_n.x_offset); |
| } |
| else |
| aux->u.auxent.x_file.x_n.x_n.x_offset = |
| ((uintptr_t) |
| copy_name (abfd, |
| aux->u.auxent.x_file.x_n.x_fname, |
| bfd_coff_filnmlen (abfd))); |
| } |
| |
| } |
| else |
| { |
| if (sym->u.syment._n._n_n._n_zeroes != 0) |
| { |
| /* This is a "short" name. Make it long. */ |
| char *newstring; |
| |
| /* Find the length of this string without walking into memory |
| that isn't ours. */ |
| for (i = 0; i < SYMNMLEN; ++i) |
| if (sym->u.syment._n._n_name[i] == '\0') |
| break; |
| |
| newstring = bfd_alloc (abfd, i + 1); |
| if (newstring == NULL) |
| return NULL; |
| memcpy (newstring, sym->u.syment._n._n_name, i); |
| newstring[i] = 0; |
| sym->u.syment._n._n_n._n_offset = (uintptr_t) newstring; |
| sym->u.syment._n._n_n._n_zeroes = 0; |
| } |
| else if (sym->u.syment._n._n_n._n_offset == 0) |
| sym->u.syment._n._n_n._n_offset = (uintptr_t) ""; |
| else if (!bfd_coff_symname_in_debug (abfd, &sym->u.syment)) |
| { |
| /* Long name already. Point symbol at the string in the |
| table. */ |
| if (string_table == NULL) |
| { |
| string_table = _bfd_coff_read_string_table (abfd); |
| if (string_table == NULL) |
| return NULL; |
| } |
| if (sym->u.syment._n._n_n._n_offset >= obj_coff_strings_len (abfd)) |
| sym->u.syment._n._n_n._n_offset = |
| (uintptr_t) _("<corrupt>"); |
| else |
| sym->u.syment._n._n_n._n_offset = |
| (uintptr_t) (string_table |
| + sym->u.syment._n._n_n._n_offset); |
| } |
| else |
| { |
| /* Long name in debug section. Very similar. */ |
| if (debug_sec_data == NULL) |
| { |
| debug_sec_data = build_debug_section (abfd, &debug_sec); |
| if (debug_sec_data == NULL) |
| return NULL; |
| } |
| /* PR binutils/17512: Catch out of range offsets into |
| the debug data. */ |
| if (sym->u.syment._n._n_n._n_offset >= debug_sec->size) |
| sym->u.syment._n._n_n._n_offset = |
| (uintptr_t) _("<corrupt>"); |
| else |
| sym->u.syment._n._n_n._n_offset = |
| (uintptr_t) (debug_sec_data |
| + sym->u.syment._n._n_n._n_offset); |
| } |
| } |
| } |
| |
| /* Free the raw symbols. */ |
| if (obj_coff_external_syms (abfd) != NULL |
| && ! obj_coff_keep_syms (abfd)) |
| { |
| free (obj_coff_external_syms (abfd)); |
| obj_coff_external_syms (abfd) = NULL; |
| } |
| |
| obj_raw_syments (abfd) = internal; |
| BFD_ASSERT (obj_raw_syment_count (abfd) |
| == (size_t) (internal_ptr - internal)); |
| |
| return internal; |
| } |
| |
| long |
| coff_get_reloc_upper_bound (bfd *abfd, sec_ptr asect) |
| { |
| size_t count, raw; |
| |
| count = asect->reloc_count; |
| if (count >= LONG_MAX / sizeof (arelent *) |
| || _bfd_mul_overflow (count, bfd_coff_relsz (abfd), &raw)) |
| { |
| bfd_set_error (bfd_error_file_too_big); |
| return -1; |
| } |
| if (!bfd_write_p (abfd)) |
| { |
| ufile_ptr filesize = bfd_get_file_size (abfd); |
| if (filesize != 0 && raw > filesize) |
| { |
| bfd_set_error (bfd_error_file_truncated); |
| return -1; |
| } |
| } |
| return (count + 1) * sizeof (arelent *); |
| } |
| |
| asymbol * |
| coff_make_empty_symbol (bfd *abfd) |
| { |
| size_t amt = sizeof (coff_symbol_type); |
| coff_symbol_type *new_symbol = (coff_symbol_type *) bfd_zalloc (abfd, amt); |
| |
| if (new_symbol == NULL) |
| return NULL; |
| new_symbol->symbol.section = 0; |
| new_symbol->native = NULL; |
| new_symbol->lineno = NULL; |
| new_symbol->done_lineno = false; |
| new_symbol->symbol.the_bfd = abfd; |
| |
| return & new_symbol->symbol; |
| } |
| |
| /* Make a debugging symbol. */ |
| |
| asymbol * |
| coff_bfd_make_debug_symbol (bfd *abfd) |
| { |
| size_t amt = sizeof (coff_symbol_type); |
| coff_symbol_type *new_symbol = (coff_symbol_type *) bfd_alloc (abfd, amt); |
| |
| if (new_symbol == NULL) |
| return NULL; |
| /* @@ The 10 is a guess at a plausible maximum number of aux entries |
| (but shouldn't be a constant). */ |
| amt = sizeof (combined_entry_type) * 10; |
| new_symbol->native = (combined_entry_type *) bfd_zalloc (abfd, amt); |
| if (!new_symbol->native) |
| return NULL; |
| new_symbol->native->is_sym = true; |
| new_symbol->symbol.section = bfd_abs_section_ptr; |
| new_symbol->symbol.flags = BSF_DEBUGGING; |
| new_symbol->lineno = NULL; |
| new_symbol->done_lineno = false; |
| new_symbol->symbol.the_bfd = abfd; |
| |
| return & new_symbol->symbol; |
| } |
| |
| void |
| coff_get_symbol_info (bfd *abfd, asymbol *symbol, symbol_info *ret) |
| { |
| bfd_symbol_info (symbol, ret); |
| |
| if (coffsymbol (symbol)->native != NULL |
| && coffsymbol (symbol)->native->fix_value |
| && coffsymbol (symbol)->native->is_sym) |
| ret->value |
| = (((uintptr_t) coffsymbol (symbol)->native->u.syment.n_value |
| - (uintptr_t) obj_raw_syments (abfd)) |
| / sizeof (combined_entry_type)); |
| } |
| |
| /* Print out information about COFF symbol. */ |
| |
| void |
| coff_print_symbol (bfd *abfd, |
| void * filep, |
| asymbol *symbol, |
| bfd_print_symbol_type how) |
| { |
| FILE * file = (FILE *) filep; |
| |
| switch (how) |
| { |
| case bfd_print_symbol_name: |
| fprintf (file, "%s", symbol->name); |
| break; |
| |
| case bfd_print_symbol_more: |
| fprintf (file, "coff %s %s", |
| coffsymbol (symbol)->native ? "n" : "g", |
| coffsymbol (symbol)->lineno ? "l" : " "); |
| break; |
| |
| case bfd_print_symbol_all: |
| if (coffsymbol (symbol)->native) |
| { |
| bfd_vma val; |
| unsigned int aux; |
| combined_entry_type *combined = coffsymbol (symbol)->native; |
| combined_entry_type *root = obj_raw_syments (abfd); |
| struct lineno_cache_entry *l = coffsymbol (symbol)->lineno; |
| |
| fprintf (file, "[%3ld]", (long) (combined - root)); |
| |
| /* PR 17512: file: 079-33786-0.001:0.1. */ |
| if (combined < obj_raw_syments (abfd) |
| || combined >= obj_raw_syments (abfd) + obj_raw_syment_count (abfd)) |
| { |
| fprintf (file, _("<corrupt info> %s"), symbol->name); |
| break; |
| } |
| |
| BFD_ASSERT (combined->is_sym); |
| if (! combined->fix_value) |
| val = (bfd_vma) combined->u.syment.n_value; |
| else |
| val = (((uintptr_t) combined->u.syment.n_value - (uintptr_t) root) |
| / sizeof (combined_entry_type)); |
| |
| fprintf (file, "(sec %2d)(fl 0x%02x)(ty %4x)(scl %3d) (nx %d) 0x", |
| combined->u.syment.n_scnum, |
| combined->u.syment.n_flags, |
| combined->u.syment.n_type, |
| combined->u.syment.n_sclass, |
| combined->u.syment.n_numaux); |
| bfd_fprintf_vma (abfd, file, val); |
| fprintf (file, " %s", symbol->name); |
| |
| for (aux = 0; aux < combined->u.syment.n_numaux; aux++) |
| { |
| combined_entry_type *auxp = combined + aux + 1; |
| long tagndx; |
| |
| BFD_ASSERT (! auxp->is_sym); |
| if (auxp->fix_tag) |
| tagndx = auxp->u.auxent.x_sym.x_tagndx.p - root; |
| else |
| tagndx = auxp->u.auxent.x_sym.x_tagndx.u32; |
| |
| fprintf (file, "\n"); |
| |
| if (bfd_coff_print_aux (abfd, file, root, combined, auxp, aux)) |
| continue; |
| |
| switch (combined->u.syment.n_sclass) |
| { |
| case C_FILE: |
| fprintf (file, "File "); |
| /* Add additional information if this isn't the filename |
| auxiliary entry. */ |
| if (auxp->u.auxent.x_file.x_ftype) |
| fprintf (file, "ftype %d fname \"%s\"", |
| auxp->u.auxent.x_file.x_ftype, |
| (char *) auxp->u.auxent.x_file.x_n.x_n.x_offset); |
| break; |
| |
| case C_DWARF: |
| fprintf (file, "AUX scnlen %#" PRIx64 " nreloc %" PRId64, |
| auxp->u.auxent.x_sect.x_scnlen, |
| auxp->u.auxent.x_sect.x_nreloc); |
| break; |
| |
| case C_STAT: |
| if (combined->u.syment.n_type == T_NULL) |
| /* Probably a section symbol ? */ |
| { |
| fprintf (file, "AUX scnlen 0x%lx nreloc %d nlnno %d", |
| (unsigned long) auxp->u.auxent.x_scn.x_scnlen, |
| auxp->u.auxent.x_scn.x_nreloc, |
| auxp->u.auxent.x_scn.x_nlinno); |
| if (auxp->u.auxent.x_scn.x_checksum != 0 |
| || auxp->u.auxent.x_scn.x_associated != 0 |
| || auxp->u.auxent.x_scn.x_comdat != 0) |
| fprintf (file, " checksum 0x%x assoc %d comdat %d", |
| auxp->u.auxent.x_scn.x_checksum, |
| auxp->u.auxent.x_scn.x_associated, |
| auxp->u.auxent.x_scn.x_comdat); |
| break; |
| } |
| /* Fall through. */ |
| case C_EXT: |
| case C_AIX_WEAKEXT: |
| if (ISFCN (combined->u.syment.n_type)) |
| { |
| long next, llnos; |
| |
| if (auxp->fix_end) |
| next = (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p |
| - root); |
| else |
| next = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.u32; |
| llnos = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_lnnoptr; |
| fprintf (file, |
| "AUX tagndx %ld ttlsiz 0x%lx lnnos %ld next %ld", |
| tagndx, |
| (unsigned long) auxp->u.auxent.x_sym.x_misc.x_fsize, |
| llnos, next); |
| break; |
| } |
| /* Fall through. */ |
| default: |
| fprintf (file, "AUX lnno %d size 0x%x tagndx %ld", |
| auxp->u.auxent.x_sym.x_misc.x_lnsz.x_lnno, |
| auxp->u.auxent.x_sym.x_misc.x_lnsz.x_size, |
| tagndx); |
| if (auxp->fix_end) |
| fprintf (file, " endndx %ld", |
| ((long) |
| (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p |
| - root))); |
| break; |
| } |
| } |
| |
| if (l) |
| { |
| fprintf (file, "\n%s :", l->u.sym->name); |
| l++; |
| while (l->line_number) |
| { |
| if (l->line_number > 0) |
| { |
| fprintf (file, "\n%4d : ", l->line_number); |
| bfd_fprintf_vma (abfd, file, l->u.offset + symbol->section->vma); |
| } |
| l++; |
| } |
| } |
| } |
| else |
| { |
| bfd_print_symbol_vandf (abfd, (void *) file, symbol); |
| fprintf (file, " %-5s %s %s %s", |
| symbol->section->name, |
| coffsymbol (symbol)->native ? "n" : "g", |
| coffsymbol (symbol)->lineno ? "l" : " ", |
| symbol->name); |
| } |
| } |
| } |
| |
| /* Return whether a symbol name implies a local symbol. In COFF, |
| local symbols generally start with ``.L''. Most targets use this |
| function for the is_local_label_name entry point, but some may |
| override it. */ |
| |
| bool |
| _bfd_coff_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, |
| const char *name) |
| { |
| return name[0] == '.' && name[1] == 'L'; |
| } |
| |
| /* Provided a BFD, a section and an offset (in bytes, not octets) into the |
| section, calculate and return the name of the source file and the line |
| nearest to the wanted location. */ |
| |
| bool |
| coff_find_nearest_line_with_names (bfd *abfd, |
| asymbol **symbols, |
| asection *section, |
| bfd_vma offset, |
| const char **filename_ptr, |
| const char **functionname_ptr, |
| unsigned int *line_ptr, |
| const struct dwarf_debug_section *debug_sections) |
| { |
| bool found; |
| unsigned int i; |
| unsigned int line_base; |
| coff_data_type *cof = coff_data (abfd); |
| /* Run through the raw syments if available. */ |
| combined_entry_type *p; |
| combined_entry_type *pend; |
| alent *l; |
| struct coff_section_tdata *sec_data; |
| size_t amt; |
| |
| /* Before looking through the symbol table, try to use a .stab |
| section to find the information. */ |
| if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, |
| &found, filename_ptr, |
| functionname_ptr, line_ptr, |
| &coff_data(abfd)->line_info)) |
| return false; |
| |
| if (found) |
| return true; |
| |
| /* Also try examining DWARF2 debugging information. */ |
| if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, |
| filename_ptr, functionname_ptr, |
| line_ptr, NULL, debug_sections, |
| &coff_data(abfd)->dwarf2_find_line_info)) |
| return true; |
| |
| sec_data = coff_section_data (abfd, section); |
| |
| /* If the DWARF lookup failed, but there is DWARF information available |
| then the problem might be that the file has been rebased. This tool |
| changes the VMAs of all the sections, but it does not update the DWARF |
| information. So try again, using a bias against the address sought. */ |
| if (coff_data (abfd)->dwarf2_find_line_info != NULL) |
| { |
| bfd_signed_vma bias = 0; |
| |
| /* Create a cache of the result for the next call. */ |
| if (sec_data == NULL && section->owner == abfd) |
| { |
| amt = sizeof (struct coff_section_tdata); |
| section->used_by_bfd = bfd_zalloc (abfd, amt); |
| sec_data = (struct coff_section_tdata *) section->used_by_bfd; |
| } |
| |
| if (sec_data != NULL && sec_data->saved_bias) |
| bias = sec_data->bias; |
| else if (symbols) |
| { |
| bias = _bfd_dwarf2_find_symbol_bias (symbols, |
| & coff_data (abfd)->dwarf2_find_line_info); |
| |
| if (sec_data) |
| { |
| sec_data->saved_bias = true; |
| sec_data->bias = bias; |
| } |
| } |
| |
| if (bias |
| && _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, |
| offset + bias, |
| filename_ptr, functionname_ptr, |
| line_ptr, NULL, debug_sections, |
| &coff_data(abfd)->dwarf2_find_line_info)) |
| return true; |
| } |
| |
| *filename_ptr = 0; |
| *functionname_ptr = 0; |
| *line_ptr = 0; |
| |
| /* Don't try and find line numbers in a non coff file. */ |
| if (!bfd_family_coff (abfd)) |
| return false; |
| |
| if (cof == NULL) |
| return false; |
| |
| /* Find the first C_FILE symbol. */ |
| p = cof->raw_syments; |
| if (!p) |
| return false; |
| |
| pend = p + cof->raw_syment_count; |
| while (p < pend) |
| { |
| BFD_ASSERT (p->is_sym); |
| if (p->u.syment.n_sclass == C_FILE) |
| break; |
| p += 1 + p->u.syment.n_numaux; |
| } |
| |
| if (p < pend) |
| { |
| bfd_vma sec_vma; |
| bfd_vma maxdiff; |
| |
| /* Look through the C_FILE symbols to find the best one. */ |
| sec_vma = bfd_section_vma (section); |
| *filename_ptr = (char *) p->u.syment._n._n_n._n_offset; |
| maxdiff = (bfd_vma) 0 - (bfd_vma) 1; |
| while (1) |
| { |
| bfd_vma file_addr; |
| combined_entry_type *p2; |
| |
| for (p2 = p + 1 + p->u.syment.n_numaux; |
| p2 < pend; |
| p2 += 1 + p2->u.syment.n_numaux) |
| { |
| BFD_ASSERT (p2->is_sym); |
| if (p2->u.syment.n_scnum > 0 |
| && (section |
| == coff_section_from_bfd_index (abfd, |
| p2->u.syment.n_scnum))) |
| break; |
| if (p2->u.syment.n_sclass == C_FILE) |
| { |
| p2 = pend; |
| break; |
| } |
| } |
| if (p2 >= pend) |
| break; |
| |
| file_addr = (bfd_vma) p2->u.syment.n_value; |
| /* PR 11512: Include the section address of the function name symbol. */ |
| if (p2->u.syment.n_scnum > 0) |
| file_addr += coff_section_from_bfd_index (abfd, |
| p2->u.syment.n_scnum)->vma; |
| /* We use <= MAXDIFF here so that if we get a zero length |
| file, we actually use the next file entry. */ |
| if (p2 < pend |
| && offset + sec_vma >= file_addr |
| && offset + sec_vma - file_addr <= maxdiff) |
| { |
| *filename_ptr = (char *) p->u.syment._n._n_n._n_offset; |
| maxdiff = offset + sec_vma - p2->u.syment.n_value; |
| } |
| |
| if (p->u.syment.n_value >= cof->raw_syment_count) |
| break; |
| |
| /* Avoid endless loops on erroneous files by ensuring that |
| we always move forward in the file. */ |
| if (p >= cof->raw_syments + p->u.syment.n_value) |
| break; |
| |
| p = cof->raw_syments + p->u.syment.n_value; |
| if (!p->is_sym || p->u.syment.n_sclass != C_FILE) |
| break; |
| } |
| } |
| |
| if (section->lineno_count == 0) |
| { |
| *functionname_ptr = NULL; |
| *line_ptr = 0; |
| return true; |
| } |
| |
| /* Now wander though the raw linenumbers of the section. |
| If we have been called on this section before, and the offset |
| we want is further down then we can prime the lookup loop. */ |
| if (sec_data != NULL |
| && sec_data->i > 0 |
| && offset >= sec_data->offset) |
| { |
| i = sec_data->i; |
| *functionname_ptr = sec_data->function; |
| line_base = sec_data->line_base; |
| } |
| else |
| { |
| i = 0; |
| line_base = 0; |
| } |
| |
| if (section->lineno != NULL) |
| { |
| bfd_vma last_value = 0; |
| |
| l = §ion->lineno[i]; |
| |
| for (; i < section->lineno_count; i++) |
| { |
| if (l->line_number == 0) |
| { |
| /* Get the symbol this line number points at. */ |
| coff_symbol_type *coff = (coff_symbol_type *) (l->u.sym); |
| if (coff->symbol.value > offset) |
| break; |
| |
| *functionname_ptr = coff->symbol.name; |
| last_value = coff->symbol.value; |
| if (coff->native) |
| { |
| combined_entry_type *s = coff->native; |
| |
| BFD_ASSERT (s->is_sym); |
| s = s + 1 + s->u.syment.n_numaux; |
| |
| /* In XCOFF a debugging symbol can follow the |
| function symbol. */ |
| if (((size_t) ((char *) s - (char *) obj_raw_syments (abfd)) |
| < obj_raw_syment_count (abfd) * sizeof (*s)) |
| && s->u.syment.n_scnum == N_DEBUG) |
| s = s + 1 + s->u.syment.n_numaux; |
| |
| /* S should now point to the .bf of the function. */ |
| if (((size_t) ((char *) s - (char *) obj_raw_syments (abfd)) |
| < obj_raw_syment_count (abfd) * sizeof (*s)) |
| && s->u.syment.n_numaux) |
| { |
| /* The linenumber is stored in the auxent. */ |
| union internal_auxent *a = &((s + 1)->u.auxent); |
| |
| line_base = a->x_sym.x_misc.x_lnsz.x_lnno; |
| *line_ptr = line_base; |
| } |
| } |
| } |
| else |
| { |
| if (l->u.offset > offset) |
| break; |
| *line_ptr = l->line_number + line_base - 1; |
| } |
| l++; |
| } |
| |
| /* If we fell off the end of the loop, then assume that this |
| symbol has no line number info. Otherwise, symbols with no |
| line number info get reported with the line number of the |
| last line of the last symbol which does have line number |
| info. We use 0x100 as a slop to account for cases where the |
| last line has executable code. */ |
| if (i >= section->lineno_count |
| && last_value != 0 |
| && offset - last_value > 0x100) |
| { |
| *functionname_ptr = NULL; |
| *line_ptr = 0; |
| } |
| } |
| |
| /* Cache the results for the next call. */ |
| if (sec_data == NULL && section->owner == abfd) |
| { |
| amt = sizeof (struct coff_section_tdata); |
| section->used_by_bfd = bfd_zalloc (abfd, amt); |
| sec_data = (struct coff_section_tdata *) section->used_by_bfd; |
| } |
| |
| if (sec_data != NULL) |
| { |
| sec_data->offset = offset; |
| sec_data->i = i - 1; |
| sec_data->function = *functionname_ptr; |
| sec_data->line_base = line_base; |
| } |
| |
| return true; |
| } |
| |
| bool |
| coff_find_nearest_line (bfd *abfd, |
| asymbol **symbols, |
| asection *section, |
| bfd_vma offset, |
| const char **filename_ptr, |
| const char **functionname_ptr, |
| unsigned int *line_ptr, |
| unsigned int *discriminator_ptr) |
| { |
| if (discriminator_ptr) |
| *discriminator_ptr = 0; |
| return coff_find_nearest_line_with_names (abfd, symbols, section, offset, |
| filename_ptr, functionname_ptr, |
| line_ptr, dwarf_debug_sections); |
| } |
| |
| bool |
| coff_find_inliner_info (bfd *abfd, |
| const char **filename_ptr, |
| const char **functionname_ptr, |
| unsigned int *line_ptr) |
| { |
| bool found; |
| |
| found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr, |
| functionname_ptr, line_ptr, |
| &coff_data(abfd)->dwarf2_find_line_info); |
| return (found); |
| } |
| |
| int |
| coff_sizeof_headers (bfd *abfd, struct bfd_link_info *info) |
| { |
| size_t size; |
| |
| if (!bfd_link_relocatable (info)) |
| size = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd); |
| else |
| size = bfd_coff_filhsz (abfd); |
| |
| size += abfd->section_count * bfd_coff_scnhsz (abfd); |
| return size; |
| } |
| |
| /* Change the class of a coff symbol held by BFD. */ |
| |
| bool |
| bfd_coff_set_symbol_class (bfd * abfd, |
| asymbol * symbol, |
| unsigned int symbol_class) |
| { |
| coff_symbol_type * csym; |
| |
| csym = coff_symbol_from (symbol); |
| if (csym == NULL) |
| { |
| bfd_set_error (bfd_error_invalid_operation); |
| return false; |
| } |
| else if (csym->native == NULL) |
| { |
| /* This is an alien symbol which no native coff backend data. |
| We cheat here by creating a fake native entry for it and |
| then filling in the class. This code is based on that in |
| coff_write_alien_symbol(). */ |
| |
| combined_entry_type * native; |
| size_t amt = sizeof (* native); |
| |
| native = (combined_entry_type *) bfd_zalloc (abfd, amt); |
| if (native == NULL) |
| return false; |
| |
| native->is_sym = true; |
| native->u.syment.n_type = T_NULL; |
| native->u.syment.n_sclass = symbol_class; |
| |
| if (bfd_is_und_section (symbol->section)) |
| { |
| native->u.syment.n_scnum = N_UNDEF; |
| native->u.syment.n_value = symbol->value; |
| } |
| else if (bfd_is_com_section (symbol->section)) |
| { |
| native->u.syment.n_scnum = N_UNDEF; |
| native->u.syment.n_value = symbol->value; |
| } |
| else |
| { |
| native->u.syment.n_scnum = |
| symbol->section->output_section->target_index; |
| native->u.syment.n_value = (symbol->value |
| + symbol->section->output_offset); |
| if (! obj_pe (abfd)) |
| native->u.syment.n_value += symbol->section->output_section->vma; |
| |
| /* Copy the any flags from the file header into the symbol. |
| FIXME: Why? */ |
| native->u.syment.n_flags = bfd_asymbol_bfd (& csym->symbol)->flags; |
| } |
| |
| csym->native = native; |
| } |
| else |
| csym->native->u.syment.n_sclass = symbol_class; |
| |
| return true; |
| } |
| |
| bool |
| _bfd_coff_section_already_linked (bfd *abfd, |
| asection *sec, |
| struct bfd_link_info *info) |
| { |
| flagword flags; |
| const char *name, *key; |
| struct bfd_section_already_linked *l; |
| struct bfd_section_already_linked_hash_entry *already_linked_list; |
| struct coff_comdat_info *s_comdat; |
| |
| if (sec->output_section == bfd_abs_section_ptr) |
| return false; |
| |
| flags = sec->flags; |
| if ((flags & SEC_LINK_ONCE) == 0) |
| return false; |
| |
| /* The COFF backend linker doesn't support group sections. */ |
| if ((flags & SEC_GROUP) != 0) |
| return false; |
| |
| name = bfd_section_name (sec); |
| s_comdat = bfd_coff_get_comdat_section (abfd, sec); |
| |
| if (s_comdat != NULL) |
| key = s_comdat->name; |
| else |
| { |
| if (startswith (name, ".gnu.linkonce.") |
| && (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL) |
| key++; |
| else |
| /* FIXME: gcc as of 2011-09 emits sections like .text$<key>, |
| .xdata$<key> and .pdata$<key> only the first of which has a |
| comdat key. Should these all match the LTO IR key? */ |
| key = name; |
| } |
| |
| already_linked_list = bfd_section_already_linked_table_lookup (key); |
| |
| for (l = already_linked_list->entry; l != NULL; l = l->next) |
| { |
| struct coff_comdat_info *l_comdat; |
| |
| l_comdat = bfd_coff_get_comdat_section (l->sec->owner, l->sec); |
| |
| /* The section names must match, and both sections must be |
| comdat and have the same comdat name, or both sections must |
| be non-comdat. LTO IR plugin sections are an exception. They |
| are always named .gnu.linkonce.t.<key> (<key> is some string) |
| and match any comdat section with comdat name of <key>, and |
| any linkonce section with the same suffix, ie. |
| .gnu.linkonce.*.<key>. */ |
| if (((s_comdat != NULL) == (l_comdat != NULL) |
| && strcmp (name, l->sec->name) == 0) |
| || (l->sec->owner->flags & BFD_PLUGIN) != 0 |
| || (sec->owner->flags & BFD_PLUGIN) != 0) |
| { |
| /* The section has already been linked. See if we should |
| issue a warning. */ |
| return _bfd_handle_already_linked (sec, l, info); |
| } |
| } |
| |
| /* This is the first section with this name. Record it. */ |
| if (!bfd_section_already_linked_table_insert (already_linked_list, sec)) |
| info->callbacks->einfo (_("%F%P: already_linked_table: %E\n")); |
| return false; |
| } |
| |
| /* Initialize COOKIE for input bfd ABFD. */ |
| |
| static bool |
| init_reloc_cookie (struct coff_reloc_cookie *cookie, |
| struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| bfd *abfd) |
| { |
| /* Sometimes the symbol table does not yet have been loaded here. */ |
| bfd_coff_slurp_symbol_table (abfd); |
| |
| cookie->abfd = abfd; |
| cookie->sym_hashes = obj_coff_sym_hashes (abfd); |
| |
| cookie->symbols = obj_symbols (abfd); |
| |
| return true; |
| } |
| |
| /* Free the memory allocated by init_reloc_cookie, if appropriate. */ |
| |
| static void |
| fini_reloc_cookie (struct coff_reloc_cookie *cookie ATTRIBUTE_UNUSED, |
| bfd *abfd ATTRIBUTE_UNUSED) |
| { |
| /* Nothing to do. */ |
| } |
| |
| /* Initialize the relocation information in COOKIE for input section SEC |
| of input bfd ABFD. */ |
| |
| static bool |
| init_reloc_cookie_rels (struct coff_reloc_cookie *cookie, |
| struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| bfd *abfd, |
| asection *sec) |
| { |
| if (sec->reloc_count == 0) |
| { |
| cookie->rels = NULL; |
| cookie->relend = NULL; |
| cookie->rel = NULL; |
| return true; |
| } |
| |
| cookie->rels = _bfd_coff_read_internal_relocs (abfd, sec, false, NULL, |
| 0, NULL); |
| |
| if (cookie->rels == NULL) |
| return false; |
| |
| cookie->rel = cookie->rels; |
| cookie->relend = (cookie->rels + sec->reloc_count); |
| return true; |
| } |
| |
| /* Free the memory allocated by init_reloc_cookie_rels, |
| if appropriate. */ |
| |
| static void |
| fini_reloc_cookie_rels (struct coff_reloc_cookie *cookie, |
| asection *sec) |
| { |
| if (cookie->rels |
| /* PR 20401. The relocs may not have been cached, so check first. |
| If the relocs were loaded by init_reloc_cookie_rels() then this |
| will be the case. FIXME: Would performance be improved if the |
| relocs *were* cached ? */ |
| && coff_section_data (NULL, sec) |
| && coff_section_data (NULL, sec)->relocs != cookie->rels) |
| free (cookie->rels); |
| } |
| |
| /* Initialize the whole of COOKIE for input section SEC. */ |
| |
| static bool |
| init_reloc_cookie_for_section (struct coff_reloc_cookie *cookie, |
| struct bfd_link_info *info, |
| asection *sec) |
| { |
| if (!init_reloc_cookie (cookie, info, sec->owner)) |
| return false; |
| |
| if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec)) |
| { |
| fini_reloc_cookie (cookie, sec->owner); |
| return false; |
| } |
| return true; |
| } |
| |
| /* Free the memory allocated by init_reloc_cookie_for_section, |
| if appropriate. */ |
| |
| static void |
| fini_reloc_cookie_for_section (struct coff_reloc_cookie *cookie, |
| asection *sec) |
| { |
| fini_reloc_cookie_rels (cookie, sec); |
| fini_reloc_cookie (cookie, sec->owner); |
| } |
| |
| static asection * |
| _bfd_coff_gc_mark_hook (asection *sec, |
| struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| struct internal_reloc *rel ATTRIBUTE_UNUSED, |
| struct coff_link_hash_entry *h, |
| struct internal_syment *sym) |
| { |
| if (h != NULL) |
| { |
| switch (h->root.type) |
| { |
| case bfd_link_hash_defined: |
| case bfd_link_hash_defweak: |
| return h->root.u.def.section; |
| |
| case bfd_link_hash_common: |
| return h->root.u.c.p->section; |
| |
| case bfd_link_hash_undefweak: |
| if (h->symbol_class == C_NT_WEAK && h->numaux == 1) |
| { |
| /* PE weak externals. A weak symbol may include an auxiliary |
| record indicating that if the weak symbol is not resolved, |
| another external symbol is used instead. */ |
| struct coff_link_hash_entry *h2 = |
| h->auxbfd->tdata.coff_obj_data->sym_hashes |
| [h->aux->x_sym.x_tagndx.u32]; |
| |
| if (h2 && h2->root.type != bfd_link_hash_undefined) |
| return h2->root.u.def.section; |
| } |
| break; |
| |
| case bfd_link_hash_undefined: |
| default: |
| break; |
| } |
| return NULL; |
| } |
| |
| return coff_section_from_bfd_index (sec->owner, sym->n_scnum); |
| } |
| |
| /* COOKIE->rel describes a relocation against section SEC, which is |
| a section we've decided to keep. Return the section that contains |
| the relocation symbol, or NULL if no section contains it. */ |
| |
| static asection * |
| _bfd_coff_gc_mark_rsec (struct bfd_link_info *info, asection *sec, |
| coff_gc_mark_hook_fn gc_mark_hook, |
| struct coff_reloc_cookie *cookie) |
| { |
| struct coff_link_hash_entry *h; |
| |
| h = cookie->sym_hashes[cookie->rel->r_symndx]; |
| if (h != NULL) |
| { |
| while (h->root.type == bfd_link_hash_indirect |
| || h->root.type == bfd_link_hash_warning) |
| h = (struct coff_link_hash_entry *) h->root.u.i.link; |
| |
| return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL); |
| } |
| |
| return (*gc_mark_hook) (sec, info, cookie->rel, NULL, |
| &(cookie->symbols |
| + obj_convert (sec->owner)[cookie->rel->r_symndx])->native->u.syment); |
| } |
| |
| static bool _bfd_coff_gc_mark |
| (struct bfd_link_info *, asection *, coff_gc_mark_hook_fn); |
| |
| /* COOKIE->rel describes a relocation against section SEC, which is |
| a section we've decided to keep. Mark the section that contains |
| the relocation symbol. */ |
| |
| static bool |
| _bfd_coff_gc_mark_reloc (struct bfd_link_info *info, |
| asection *sec, |
| coff_gc_mark_hook_fn gc_mark_hook, |
| struct coff_reloc_cookie *cookie) |
| { |
| asection *rsec; |
| |
| rsec = _bfd_coff_gc_mark_rsec (info, sec, gc_mark_hook, cookie); |
| if (rsec && !rsec->gc_mark) |
| { |
| if (bfd_get_flavour (rsec->owner) != bfd_target_coff_flavour) |
| rsec->gc_mark = 1; |
| else if (!_bfd_coff_gc_mark (info, rsec, gc_mark_hook)) |
| return false; |
| } |
| return true; |
| } |
| |
| /* The mark phase of garbage collection. For a given section, mark |
|