diff options
Diffstat (limited to 'elf/dl-lookup.c')
| -rw-r--r-- | elf/dl-lookup.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c index 4d5d795..ca0f034 100644 --- a/elf/dl-lookup.c +++ b/elf/dl-lookup.c @@ -23,13 +23,15 @@ Cambridge, MA 02139, USA. */ #include <assert.h> /* Search loaded objects' symbol tables for a definition of - the symbol UNDEF_NAME. Don't use a PLT defn in UNDEF_MAP, since - that is the object making the reference. */ + the symbol UNDEF_NAME. If NOSELF is nonzero, then *REF + cannot satisfy the reference itself; some different binding + must be found. */ Elf32_Addr _dl_lookup_symbol (const char *undef_name, const Elf32_Sym **ref, struct link_map *symbol_scope, - const char *reference_name) + const char *reference_name, + int noself) { unsigned long int hash = elf_hash (undef_name); struct link_map *map; @@ -57,7 +59,9 @@ _dl_lookup_symbol (const char *undef_name, const Elf32_Sym **ref, { const Elf32_Sym *sym = &symtab[symidx]; - if (sym->st_value == 0) + if (sym->st_value == 0 || /* No value. */ + sym->st_shndx == SHN_UNDEF || /* PLT entry. */ + (noself && sym == *ref)) /* The reference can't define it. */ continue; switch (ELF32_ST_TYPE (sym->st_info)) @@ -71,12 +75,6 @@ _dl_lookup_symbol (const char *undef_name, const Elf32_Sym **ref, continue; } - if (sym->st_shndx == SHN_UNDEF) - /* This is the same symbol we are looking for the value for. - If it is a PLT entry, it will have a value of its own; - but that is not what we are looking for. */ - continue; - if (sym != *ref && strcmp (strtab + sym->st_name, undef_name)) /* Not the symbol we are looking for. */ continue; |