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authorUlrich Drepper <drepper@redhat.com>2002-09-27 03:17:20 +0000
committerUlrich Drepper <drepper@redhat.com>2002-09-27 03:17:20 +0000
commit9a88a2d7b35b7f08c07a9a189a176e7ca49d82b4 (patch)
tree67af4eeb0d14730788cbd9a2b3dd0d095db8aee2 /elf
parent58c9f058a240339cbbb6476d804d80f02a59595f (diff)
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Update.
2002-09-26 Ulrich Drepper <drepper@redhat.com> * elf/dynamic-link.h (elf_get_dynamic_info): Relocate DT_HASH entry if necessary. * elf/dl-lookup.c (_dl_setup_hash): DT_HASH entry is already relocated. * elf/dl-addr.c (_dl_addr): Use .hash[1] entry to determine end of the symbol table if necessary.
Diffstat (limited to 'elf')
-rw-r--r--elf/dl-addr.c16
-rw-r--r--elf/dl-lookup.c2
2 files changed, 14 insertions, 4 deletions
diff --git a/elf/dl-addr.c b/elf/dl-addr.c
index 11f8311..66cec39 100644
--- a/elf/dl-addr.c
+++ b/elf/dl-addr.c
@@ -28,7 +28,7 @@ _dl_addr (const void *address, Dl_info *info)
{
const ElfW(Addr) addr = DL_LOOKUP_ADDRESS (address);
struct link_map *l, *match;
- const ElfW(Sym) *symtab, *matchsym;
+ const ElfW(Sym) *symtab, *matchsym, *symtabend;
const char *strtab;
ElfW(Word) strtabsize;
@@ -71,11 +71,21 @@ _dl_addr (const void *address, Dl_info *info)
symtab = (const void *) D_PTR (match, l_info[DT_SYMTAB]);
strtab = (const void *) D_PTR (match, l_info[DT_STRTAB]);
+
strtabsize = match->l_info[DT_STRSZ]->d_un.d_val;
+ if (match->l_info[DT_HASH] != NULL)
+ symtabend = symtab + ((Elf_Symndx *) D_PTR (match, l_info[DT_HASH]))[1];
+ else
+ /* There is no direct way to determine the number of symbols in the
+ dynamic symbol table and no hash table is present. The ELF
+ binary is ill-formed but what shall we do? Use the beginning of
+ the string table which generally follows the symbol table. */
+ symtabend = strtab;
+
/* We assume that the string table follows the symbol table, because
there is no way in ELF to know the size of the dynamic symbol table!! */
- for (matchsym = NULL; (void *) symtab < (void *) strtab; ++symtab)
+ for (matchsym = NULL; (void *) symtab < (void *) symtabend; ++symtab)
if (addr >= match->l_addr + symtab->st_value
&& ((symtab->st_size == 0 && addr == match->l_addr + symtab->st_value)
|| addr < match->l_addr + symtab->st_value + symtab->st_size)
@@ -83,7 +93,7 @@ _dl_addr (const void *address, Dl_info *info)
&& (matchsym == NULL || matchsym->st_value < symtab->st_value)
&& (ELFW(ST_BIND) (symtab->st_info) == STB_GLOBAL
|| ELFW(ST_BIND) (symtab->st_info) == STB_WEAK))
- matchsym = symtab;
+ matchsym = (ElfW(Sym) *) symtab;
if (matchsym)
{
diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c
index e2f5506..1c3d9b5 100644
--- a/elf/dl-lookup.c
+++ b/elf/dl-lookup.c
@@ -587,7 +587,7 @@ _dl_setup_hash (struct link_map *map)
if (!map->l_info[DT_HASH])
return;
- hash = (void *)(map->l_addr + map->l_info[DT_HASH]->d_un.d_ptr);
+ hash = (void *) D_PTR (map, l_info[DT_HASH]);
map->l_nbuckets = *hash++;
nchain = *hash++;