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.

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