diff options
Diffstat (limited to 'elf/dl-reloc.c')
| -rw-r--r-- | elf/dl-reloc.c | 55 |
1 files changed, 39 insertions, 16 deletions
diff --git a/elf/dl-reloc.c b/elf/dl-reloc.c index 99cb189..276aea0 100644 --- a/elf/dl-reloc.c +++ b/elf/dl-reloc.c @@ -27,6 +27,9 @@ #include <sys/types.h> #include "dynamic-link.h" +/* Statistics function. */ +unsigned long int _dl_num_cache_relocations; + void _dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[], @@ -74,31 +77,51 @@ cannot make segment writable for relocation")); /* This macro is used as a callback from the ELF_DYNAMIC_RELOCATE code. */ #define RESOLVE_MAP(ref, version, flags) \ (ELFW(ST_BIND) ((*ref)->st_info) != STB_LOCAL \ - ? ((version) != NULL && (version)->hash != 0 \ - ? _dl_lookup_versioned_symbol (strtab + (*ref)->st_name, l, (ref), \ - scope, (version), (flags), 0) \ - : _dl_lookup_symbol (strtab + (*ref)->st_name, l, (ref), scope, \ - (flags), 0)) \ + ? ((__builtin_expect ((*ref) == l->l_lookup_cache.sym, 0) \ + && elf_machine_lookup_noexec_p (flags) == l->l_lookup_cache.noexec \ + && elf_machine_lookup_noplt_p (flags) == l->l_lookup_cache.noplt) \ + ? (++_dl_num_cache_relocations, \ + (*ref) = l->l_lookup_cache.ret, \ + l->l_lookup_cache.value) \ + : ({ lookup_t _lr; \ + l->l_lookup_cache.sym = (*ref); \ + l->l_lookup_cache.noexec = elf_machine_lookup_noexec_p (flags); \ + l->l_lookup_cache.noplt = elf_machine_lookup_noplt_p (flags); \ + _lr = ((version) != NULL && (version)->hash != 0 \ + ? _dl_lookup_versioned_symbol (strtab + (*ref)->st_name, \ + l, (ref), scope, \ + (version), (flags), 0) \ + : _dl_lookup_symbol (strtab + (*ref)->st_name, l, (ref), \ + scope, (flags), 0)); \ + l->l_lookup_cache.ret = (*ref); \ + l->l_lookup_cache.value = _lr; })) \ : l) #define RESOLVE(ref, version, flags) \ (ELFW(ST_BIND) ((*ref)->st_info) != STB_LOCAL \ - ? ((version) != NULL && (version)->hash != 0 \ - ? _dl_lookup_versioned_symbol (strtab + (*ref)->st_name, l, (ref), \ - scope, (version), (flags), 0) \ - : _dl_lookup_symbol (strtab + (*ref)->st_name, l, (ref), scope, \ - (flags), 0)) \ + ? ((__builtin_expect ((*ref) == l->l_lookup_cache.sym, 0) \ + && elf_machine_lookup_noexec_p (flags) == l->l_lookup_cache.noexec \ + && elf_machine_lookup_noplt_p (flags) == l->l_lookup_cache.noplt) \ + ? (++_dl_num_cache_relocations, \ + (*ref) = l->l_lookup_cache.ret, \ + l->l_lookup_cache.value) \ + : ({ lookup_t _lr; \ + l->l_lookup_cache.sym = (*ref); \ + l->l_lookup_cache.noexec = elf_machine_lookup_noexec_p (flags); \ + l->l_lookup_cache.noplt = elf_machine_lookup_noplt_p (flags); \ + _lr = ((version) != NULL && (version)->hash != 0 \ + ? _dl_lookup_versioned_symbol (strtab + (*ref)->st_name, \ + l, (ref), scope, \ + (version), (flags), 0) \ + : _dl_lookup_symbol (strtab + (*ref)->st_name, l, (ref), \ + scope, (flags), 0)); \ + l->l_lookup_cache.ret = (*ref); \ + l->l_lookup_cache.value = _lr; })) \ : l->l_addr) #include "dynamic-link.h" - /* Start symbol lookup caching for this object. */ - _dl_lookup_cache.map = l; - _dl_lookup_cache_versioned.map = l; ELF_DYNAMIC_RELOCATE (l, lazy, consider_profiling); - _dl_lookup_cache.map = NULL; - _dl_lookup_cache_versioned.map = NULL; - if (__builtin_expect (consider_profiling, 0)) { /* Allocate the array which will contain the already found |