diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/dl-lookup.c | 32 | ||||
| -rw-r--r-- | elf/dl-support.c | 1 | ||||
| -rw-r--r-- | elf/link.h | 1 | ||||
| -rw-r--r-- | elf/rtld.c | 12 |
4 files changed, 30 insertions, 16 deletions
diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c index c3231ac2c5..9ee8381f66 100644 --- a/elf/dl-lookup.c +++ b/elf/dl-lookup.c @@ -63,10 +63,12 @@ struct sym_val static inline int do_lookup (const char *undef_name, unsigned long int hash, const ElfW(Sym) *ref, struct sym_val *result, - struct link_map *list[], size_t i, size_t n, - const char *reference_name, const struct r_found_version *version, - struct link_map *skip, int reloc_type) + struct link_map *scope, size_t i, const char *reference_name, + const struct r_found_version *version, struct link_map *skip, + int reloc_type) { + struct link_map **list = scope->l_searchlist; + size_t n = scope->l_nsearchlist; struct link_map *map; for (; i < n; ++i) @@ -96,6 +98,12 @@ do_lookup (const char *undef_name, unsigned long int hash, if (map->l_info[DT_SYMTAB] == NULL) continue; + /* Print some debugging info if wanted. */ + if (_dl_debug_symbols) + _dl_debug_message ("\tsymbol=", undef_name, "; lookup in file=", + map->l_name[0] ? map->l_name : _dl_argv[0], + "\n", NULL); + symtab = ((void *) map->l_addr + map->l_info[DT_SYMTAB]->d_un.d_ptr); strtab = ((void *) map->l_addr + map->l_info[DT_STRTAB]->d_un.d_ptr); verstab = map->l_versyms; @@ -214,8 +222,7 @@ _dl_lookup_symbol (const char *undef_name, const ElfW(Sym) **ref, /* Search the relevant loaded objects for a definition. */ for (scope = symbol_scope; *scope; ++scope) if (do_lookup (undef_name, hash, *ref, ¤t_value, - (*scope)->l_searchlist, 0, (*scope)->l_nsearchlist, - reference_name, NULL, NULL, reloc_type)) + *scope, 0, reference_name, NULL, NULL, reloc_type)) break; if (current_value.s == NULL) @@ -261,12 +268,10 @@ _dl_lookup_symbol_skip (const char *undef_name, const ElfW(Sym) **ref, assert (i < (*scope)->l_ndupsearchlist); if (! do_lookup (undef_name, hash, *ref, ¤t_value, - (*scope)->l_dupsearchlist, i, (*scope)->l_ndupsearchlist, - reference_name, NULL, skip_map, 0)) + *scope, i, reference_name, NULL, skip_map, 0)) while (*++scope) if (do_lookup (undef_name, hash, *ref, ¤t_value, - (*scope)->l_dupsearchlist, 0, (*scope)->l_ndupsearchlist, - reference_name, NULL, skip_map, 0)) + *scope, 0, reference_name, NULL, skip_map, 0)) break; if (current_value.s == NULL) @@ -306,8 +311,7 @@ _dl_lookup_versioned_symbol (const char *undef_name, const ElfW(Sym) **ref, for (scope = symbol_scope; *scope; ++scope) { int res = do_lookup (undef_name, hash, *ref, ¤t_value, - (*scope)->l_searchlist, 0, (*scope)->l_nsearchlist, - reference_name, version, NULL, reloc_type); + *scope, 0, reference_name, version, NULL, reloc_type); if (res > 0) break; @@ -369,12 +373,10 @@ _dl_lookup_versioned_symbol_skip (const char *undef_name, assert (i < (*scope)->l_ndupsearchlist); if (! do_lookup (undef_name, hash, *ref, ¤t_value, - (*scope)->l_dupsearchlist, i, (*scope)->l_ndupsearchlist, - reference_name, version, skip_map, 0)) + *scope, i, reference_name, version, skip_map, 0)) while (*++scope) if (do_lookup (undef_name, hash, *ref, ¤t_value, - (*scope)->l_dupsearchlist, 0, (*scope)->l_ndupsearchlist, - reference_name, version, skip_map, 0)) + *scope, 0, reference_name, version, skip_map, 0)) break; if (current_value.s == NULL) diff --git a/elf/dl-support.c b/elf/dl-support.c index 6b6a22d1d3..39fa47cd4d 100644 --- a/elf/dl-support.c +++ b/elf/dl-support.c @@ -38,6 +38,7 @@ size_t _dl_platformlen; int _dl_debug_libs; int _dl_debug_impcalls; int _dl_debug_bindings; +int _dl_debug_symbols; /* If nonzero print warnings about problematic situations. */ int _dl_verbose; diff --git a/elf/link.h b/elf/link.h index d5e2b7f6b3..b2eb572d77 100644 --- a/elf/link.h +++ b/elf/link.h @@ -252,6 +252,7 @@ extern struct link_map *_dl_profile_map; extern int _dl_debug_libs; extern int _dl_debug_impcalls; extern int _dl_debug_bindings; +extern int _dl_debug_symbols; /* File deccriptor to write debug messages to. */ extern int _dl_debug_fd; diff --git a/elf/rtld.c b/elf/rtld.c index 2cb11bb059..565f9caaaa 100644 --- a/elf/rtld.c +++ b/elf/rtld.c @@ -77,6 +77,7 @@ struct link_map *_dl_profile_map; int _dl_debug_libs; int _dl_debug_impcalls; int _dl_debug_bindings; +int _dl_debug_symbols; /* Set nonzero during loading and initialization of executable and libraries, cleared before the executable's entry point runs. This @@ -937,7 +938,7 @@ process_dl_debug (char *dl_debug) any_debug = 1; dl_debug += 8; } - if (strncmp (dl_debug, "libs", 4) == 0 + else if (strncmp (dl_debug, "libs", 4) == 0 && (issep (dl_debug[4]) || dl_debug[4] == '\0')) { _dl_debug_libs = 1; @@ -954,12 +955,21 @@ Valid options for the LD_DEBUG environment variable are:\n\ bindings display information about symbol binding\n\ help display this help message and exit\n\ libs display library search paths\n\ + symbols display symbol table processing\n\ \n\ To direct the debugging output into a file instead of standard output\n\ a filename can be specified using the LD_DEBUG_OUTPUT environment variable.\n", NULL); _exit (0); } + else if (strncmp (dl_debug, "symbols", 7) == 0 + && (issep (dl_debug[7]) || dl_debug[7] == '\0')) + { + _dl_debug_symbols = 1; + _dl_debug_impcalls = 1; + any_debug = 1; + dl_debug += 7; + } else /* Skip everything until next separator. */ do |