diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/dl-support.c | 3 | ||||
| -rw-r--r-- | elf/do-lookup.h | 20 | ||||
| -rw-r--r-- | elf/rtld.c | 13 |
3 files changed, 25 insertions, 11 deletions
diff --git a/elf/dl-support.c b/elf/dl-support.c index 68973cc..4006d96 100644 --- a/elf/dl-support.c +++ b/elf/dl-support.c @@ -42,6 +42,7 @@ int _dl_debug_versions; int _dl_debug_reloc; int _dl_debug_files; int _dl_lazy; +int _dl_dynamic_weak; /* If nonzero print warnings about problematic situations. */ int _dl_verbose; @@ -107,6 +108,8 @@ non_dynamic_init (void) _dl_lazy = *(getenv ("LD_BIND_NOW") ?: "") == '\0'; + _dl_dynamic_weak = *(getenv ("LD_DYNAMIC_WEAK") ?: "") == '\0'; + #ifdef DL_PLATFORM_INIT DL_PLATFORM_INIT; #endif diff --git a/elf/do-lookup.h b/elf/do-lookup.h index 873e953..ffc98ab 100644 --- a/elf/do-lookup.h +++ b/elf/do-lookup.h @@ -157,19 +157,23 @@ FCT (const char *undef_name, struct link_map *undef_map, found_it: switch (ELFW(ST_BIND) (sym->st_info)) { + case STB_WEAK: + /* Weak definition. Use this value if we don't find another. */ + if (__builtin_expect (_dl_dynamic_weak, 0)) + { + if (! result->s) + { + result->s = sym; + result->m = map; + } + break; + } + /* FALLTHROUGH */ case STB_GLOBAL: /* Global definition. Just what we need. */ result->s = sym; result->m = map; return 1; - case STB_WEAK: - /* Weak definition. Use this value if we don't find another. */ - if (! result->s) - { - result->s = sym; - result->m = map; - } - break; default: /* Local symbols are ignored. */ break; @@ -87,6 +87,7 @@ const char *_dl_profile; const char *_dl_profile_output; struct link_map *_dl_profile_map; int _dl_lazy; +int _dl_dynamic_weak; int _dl_debug_libs; int _dl_debug_impcalls; int _dl_debug_bindings; @@ -1393,6 +1394,13 @@ process_envvars (enum mode *modep, int *lazyp) break; case 12: + /* The library search path. */ + if (memcmp (&envline[3], "LIBRARY_PATH", 12) == 0) + { + library_path = &envline[16]; + break; + } + /* Where to place the profiling data file. */ if (memcmp (&envline[3], "DEBUG_OUTPUT", 12) == 0) { @@ -1400,9 +1408,8 @@ process_envvars (enum mode *modep, int *lazyp) break; } - /* The library search path. */ - if (memcmp (&envline[3], "LIBRARY_PATH", 12) == 0) - library_path = &envline[16]; + if (memcmp (&envline[3], "DYNAMIC_WEAK", 12) == 0) + _dl_dynamic_weak = 1; break; case 14: |