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| author | Alan Modra <amodra@gmail.com> | 2015-11-08 09:29:00 -0800 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2015-11-08 10:00:59 -0800 |
| commit | 190b968f189cb7d06223bb39045ec9055df67f68 (patch) | |
| tree | 9335140975b6e9066773329d1fbd04d7ef6e9c88 /src/unexelf.c | |
| parent | 47c6e3035b8182c6436de4673473de7824ad59f1 (diff) | |
| download | emacs-190b968f189cb7d06223bb39045ec9055df67f68.tar.gz | |
ELF unexec: Symbol table patching
No st_shndx value larger than SHN_LORESERVE should be changed.
* unexelf.c (unexec): Don't adjust any st_shndx larger than
SHN_LORESERVE. Error on SHN_XINDEX.
Diffstat (limited to 'src/unexelf.c')
| -rw-r--r-- | src/unexelf.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/unexelf.c b/src/unexelf.c index 0065491b453..286ba2e99c1 100644 --- a/src/unexelf.c +++ b/src/unexelf.c @@ -1118,7 +1118,7 @@ temacs: } #endif /* __sgi */ - /* If it is the symbol table, its st_shndx field needs to be patched. */ + /* Patch st_shndx field of symbol table. */ if (new_shdr->sh_type == SHT_SYMTAB || new_shdr->sh_type == SHT_DYNSYM) { @@ -1126,9 +1126,10 @@ temacs: ElfW (Sym) *sym = (ElfW (Sym) *) (new_shdr->sh_offset + new_base); for (; num--; sym++) { - if ((sym->st_shndx == SHN_UNDEF) - || (sym->st_shndx == SHN_ABS) - || (sym->st_shndx == SHN_COMMON)) + if (sym->st_shndx == SHN_XINDEX) + fatal ("SHT_SYMTAB_SHNDX unsupported"); + if (sym->st_shndx == SHN_UNDEF + || sym->st_shndx >= SHN_LORESERVE) continue; PATCH_INDEX (sym->st_shndx); |