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| author | Jan Beulich <jbeulich@novell.com> | 2015-12-15 14:31:25 +0100 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2015-12-15 14:31:25 +0100 |
| commit | 270f824531ceef276616a5d2f3027fa9f537c10b (patch) | |
| tree | 3f20d74a1748d2da2516da51fa9afc63430f35e0 /bfd/cofflink.c | |
| parent | 1d19cae752a7b032b8253feb4fa3b9f1dc162823 (diff) | |
| download | gdb-270f824531ceef276616a5d2f3027fa9f537c10b.zip gdb-270f824531ceef276616a5d2f3027fa9f537c10b.tar.gz gdb-270f824531ceef276616a5d2f3027fa9f537c10b.tar.bz2 | |
bfd: don't produce corrupt COFF symbol table due to long ELF file name symbols
The re-writing logic in _bfd_coff_final_link() overwrote the ".file"
part of the symbol table entry, due to not coping with the auxiliary
entry generated in all cases.
Note that while I would have wanted to add a test case,
(a) I didn't spot any one testing the base functionality here, and
(b) I wasn't able to figure out proper conditionals to use in e.g.
ld-elf/elf.exp to check for the necessary PE/PE+ support (which
varies by target).
Diffstat (limited to 'bfd/cofflink.c')
| -rw-r--r-- | bfd/cofflink.c | 48 |
1 files changed, 39 insertions, 9 deletions
diff --git a/bfd/cofflink.c b/bfd/cofflink.c index 13d773a..16ba0ac 100644 --- a/bfd/cofflink.c +++ b/bfd/cofflink.c @@ -872,9 +872,10 @@ _bfd_coff_final_link (bfd *abfd, asymbol *sym = bfd_get_outsymbols (sub) [i]; file_ptr pos; struct internal_syment isym; - bfd_size_type string_size = 0; + union internal_auxent iaux; + bfd_size_type string_size = 0, indx; bfd_vma written = 0; - bfd_boolean rewrite = FALSE; + bfd_boolean rewrite = FALSE, hash; if (! (sym->flags & BSF_LOCAL) || (sym->flags & (BSF_SECTION_SYM | BSF_DEBUGGING_RELOC @@ -900,23 +901,52 @@ _bfd_coff_final_link (bfd *abfd, * symesz; if (bfd_seek (abfd, pos, SEEK_SET) != 0) goto error_return; - if (! coff_write_alien_symbol(abfd, sym, &isym, &written, + if (! coff_write_alien_symbol(abfd, sym, &isym, &iaux, &written, &string_size, NULL, NULL)) goto error_return; - if (string_size) + hash = !flaginfo.info->traditional_format; + + if (string_size >= 6 && isym.n_sclass == C_FILE + && ! isym._n._n_n._n_zeroes && isym.n_numaux) { - bfd_boolean hash = !flaginfo.info->traditional_format; - bfd_size_type indx; + indx = _bfd_stringtab_add (flaginfo.strtab, ".file", hash, + FALSE); + if (indx == (bfd_size_type) -1) + goto error_return; + isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; + bfd_coff_swap_sym_out (abfd, &isym, flaginfo.outsyms); + if (bfd_seek (abfd, pos, SEEK_SET) != 0 + || bfd_bwrite (flaginfo.outsyms, symesz, + abfd) != symesz) + goto error_return; + string_size -= 6; + } + if (string_size) + { indx = _bfd_stringtab_add (flaginfo.strtab, bfd_asymbol_name (sym), hash, FALSE); if (indx == (bfd_size_type) -1) goto error_return; - isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; - bfd_coff_swap_sym_out (abfd, &isym, flaginfo.outsyms); - rewrite = TRUE; + if (isym.n_sclass != C_FILE) + { + isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; + bfd_coff_swap_sym_out (abfd, &isym, flaginfo.outsyms); + rewrite = TRUE; + } + else + { + BFD_ASSERT (isym.n_numaux == 1); + iaux.x_file.x_n.x_offset = STRING_SIZE_SIZE + indx; + bfd_coff_swap_aux_out (abfd, &iaux, isym.n_type, C_FILE, + 0, 1, flaginfo.outsyms + symesz); + if (bfd_seek (abfd, pos + symesz, SEEK_SET) != 0 + || bfd_bwrite (flaginfo.outsyms + symesz, symesz, + abfd) != symesz) + goto error_return; + } } if (isym.n_sclass == C_FILE) |