diff options
Diffstat (limited to 'sysdeps/generic')
| -rw-r--r-- | sysdeps/generic/ldsodefs.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h index ddec0be..f68fdf4 100644 --- a/sysdeps/generic/ldsodefs.h +++ b/sysdeps/generic/ldsodefs.h @@ -88,6 +88,19 @@ typedef struct link_map *lookup_t; || (ADDR) < (L)->l_addr + (SYM)->st_value + (SYM)->st_size) \ && ((MATCHSYM) == NULL || (MATCHSYM)->st_value < (SYM)->st_value)) +/* According to the ELF gABI no STV_HIDDEN or STV_INTERNAL symbols are + expected to be present in dynamic symbol tables as they should have + been either removed or converted to STB_LOCAL binding by the static + linker. However some GNU binutils versions produce such symbols in + some cases. To prevent such symbols present in a buggy binary from + preempting global symbols we filter them out with this predicate. */ +static __always_inline bool +dl_symbol_visibility_binds_local_p (const ElfW(Sym) *sym) +{ + return (ELFW(ST_VISIBILITY) (sym->st_other) == STV_HIDDEN + || ELFW(ST_VISIBILITY) (sym->st_other) == STV_INTERNAL); +} + /* Unmap a loaded object, called by _dl_close (). */ #ifndef DL_UNMAP_IS_SPECIAL # define DL_UNMAP(map) _dl_unmap_segments (map) |