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authorUlrich Drepper <drepper@redhat.com>1998-03-10 00:16:33 +0000
committerUlrich Drepper <drepper@redhat.com>1998-03-10 00:16:33 +0000
commitde100ca78f839854b10a04bf34ef57eb45ac77ae (patch)
tree343ae19eaa536f722a5288da1e9890a78014ae2f /elf
parent1393c745813e58e6bfbcb728b471765c4aa6c36f (diff)
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Update.
1998-03-10 00:10 Ulrich Drepper <drepper@cygnus.com> * elf/dl-lookup.c (do_lookup): Remove list and n parameter and add instead scope. If debugging display information about symbol resolving. (_dl_lookup_symbol): Call do_lookup with correct parameters. (_dl_lookup_symbol_skip): Likewise. (_dl_lookup_versioned_symbol): Likewise. (_dl_lookup_versioned_symbol_skip): Likewise. * elf/dl-support.c: Define _dl_debug_symbols. * elf/link.h: Add declaration for _dl_debug_symbols. * elf/rtld.c: Define _dl_debug_symbols. (process_dl_debug): Recognize symbols option.
Diffstat (limited to 'elf')
-rw-r--r--elf/dl-lookup.c32
-rw-r--r--elf/dl-support.c1
-rw-r--r--elf/link.h1
-rw-r--r--elf/rtld.c12
4 files changed, 30 insertions, 16 deletions
diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c
index c3231ac..9ee8381 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, &current_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, &current_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, &current_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, &current_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, &current_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, &current_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 6b6a22d..39fa47c 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 d5e2b7f..b2eb572 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 2cb11bb..565f9ca 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