Update.

1998-03-10 17:54  Ulrich Drepper  <drepper@cygnus.com>

	* libc.map: Add _dl_debug_message.
	* elf/dl-misc.c: Make _dl_debug_message a function.  Print the PID
	before every line.
	* elf/fini.c: Correctly use new _dl_debug_message function.
	* elf/init.c: Likewise.
	* elf/dl-lookup.c: Likewise.
	* sysdeps/unix/sysv/linux/libc-start.c: Likewise.
	* elf/dl-load.c: Likewise.  Add more debugging prints.
	* elf/dl-reloc.c: Likewise.
	* elf/dl-version.c: Likewise.
	* elf/dl-support.c: Add variables for debugging.
	* elf/rtld.c: Likewise.  Recognize new debug options.
	* elf/link.h: Declare new variables.

	* elf/dl-deps.c (_dl_map_object_deps): Little optimizations.

	* sysdeps/unix/sysv/linux/sys/quota.h: Extract information from
	kernel headers.  Patch by a sun <asun@saul7.u.washington.edu>.

1998-03-11 00:16  Tim Waugh  <tim@cyberelk.demon.co.uk>

	* posix/wordexp-test.c (command_line_test): New function to allow
	testing of specific cases from the command-line.

1998-03-10  Ulrich Drepper  <drepper@cygnus.com>

	* elf/dl-init.c (_dl_init_next): Print nicer messages.
	* elf/dl-fini.c (_dl_fini): Likewise.
	* sysdeps/unix/sysv/linux/libc-start.c (__libc_start_main): Likewise.

11 files changed, 174 insertions, 34 deletions

diff --git a/elf/dl-deps.c b/elf/dl-deps.c
index c069fab..76e71d7 100644
--- a/elf/dl-deps.c
+++ b/elf/dl-deps.c
@@ -139,7 +139,7 @@ _dl_map_object_deps (struct link_map *map,
     {
       struct link_map *l = runp->map;
 
-      if (l->l_info[AUXTAG] || l->l_info[FILTERTAG] || l->l_info[DT_NEEDED])
+      if (l->l_info[DT_NEEDED] || l->l_info[AUXTAG] || l->l_info[FILTERTAG])
 	{
 	  const char *strtab = ((void *) l->l_addr
 				+ l->l_info[DT_STRTAB]->d_un.d_ptr);
@@ -228,12 +228,11 @@ _dl_map_object_deps (struct link_map *map,
 		newp = alloca (sizeof (struct list));
 
 		/* Copy the content of the current entry over.  */
-		memcpy (newp, orig, sizeof (*newp));
+		orig->dup = memcpy (newp, orig, sizeof (*newp));
 
 		/* Initialize new entry.  */
 		orig->done = 0;
 		orig->map = args.aux;
-		orig->dup = newp;
 
 		/* We must handle two situations here: the map is new,
 		   so we must add it in all three lists.  If the map
@@ -347,7 +346,7 @@ _dl_map_object_deps (struct link_map *map,
       if (runp->done)
 	do
 	  runp = runp->unique;
-	while (runp && runp->done);
+	while (runp != NULL && runp->done);
     }
 
   /* Store the search list we built in the object.  It will be used for
diff --git a/elf/dl-fini.c b/elf/dl-fini.c
index 9dcd87a..abbd8c8 100644
--- a/elf/dl-fini.c
+++ b/elf/dl-fini.c
@@ -32,9 +32,9 @@ _dl_fini (void)
 	  {
 	    /* When debugging print a message first.  */
 	    if (_dl_debug_impcalls)
-	      _dl_debug_message ("\n\tcalling fini: ",
+	      _dl_debug_message (1, "\ncalling fini: ",
 				 l->l_name[0] ? l->l_name : _dl_argv[0],
-				 "\n", NULL);
+				 "\n\n", NULL);
 
 	    (*(void (*) (void)) (l->l_addr + l->l_info[DT_FINI]->d_un.d_ptr)) ();
 	  }
diff --git a/elf/dl-init.c b/elf/dl-init.c
index 6fcac75..6bdad4e 100644
--- a/elf/dl-init.c
+++ b/elf/dl-init.c
@@ -60,7 +60,7 @@ _dl_init_next (struct link_map *map)
 
 	  /* Print a debug message if wanted.  */
 	  if (_dl_debug_impcalls)
-	    _dl_debug_message ("\tcalling init: ",
+	    _dl_debug_message (1, "\ncalling init: ",
 				l->l_name[0] ? l->l_name : _dl_argv[0],
 				"\n\n", NULL);
 
diff --git a/elf/dl-load.c b/elf/dl-load.c
index 1d700f9..06c8ad5 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -28,6 +28,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include "dynamic-link.h"
+#include <stdio-common/_itoa.h>
 
 
 /* On some systems, no flag bits are given to specify file mapping.  */
@@ -527,6 +528,7 @@ _dl_map_object_from_fd (char *name, int fd, char *realname,
   const ElfW(Ehdr) *header;
   const ElfW(Phdr) *phdr;
   const ElfW(Phdr) *ph;
+  size_t maplength;
   int type;
 
   /* Look again to see if the real name matched another already loaded.  */
@@ -545,6 +547,10 @@ _dl_map_object_from_fd (char *name, int fd, char *realname,
 	return l;
       }
 
+  /* Print debugging message.  */
+  if (_dl_debug_files)
+    _dl_debug_message (1, "file=", name, ";  generating link map\n", NULL);
+
   /* Map in the first page to read the header.  */
   header = map (0, sizeof *header);
 
@@ -663,6 +669,9 @@ _dl_map_object_from_fd (char *name, int fd, char *realname,
     /* Now process the load commands and map segments into memory.  */
     c = loadcmds;
 
+    /* Length of the sections to be loaded.  */
+    maplength = loadcmds[nloadcmds - 1].allocend - c->mapstart;
+
     if (type == ET_DYN || type == ET_REL)
       {
 	/* This is a position-independent shared object.  We can let the
@@ -678,7 +687,6 @@ _dl_map_object_from_fd (char *name, int fd, char *realname,
 	   the OS can do whatever it likes. */
  	caddr_t mapat;
 	ElfW(Addr) mappref;
-	size_t maplength = loadcmds[nloadcmds - 1].allocend - c->mapstart;
 	mappref = (ELF_PREFERRED_ADDRESS (loader, maplength, c->mapstart)
 		   - MAP_BASE_ADDR (l));
 	mapat = map_segment (mappref, maplength, c->prot, 0, c->mapoff);
@@ -786,6 +794,36 @@ _dl_map_object_from_fd (char *name, int fd, char *realname,
 
   l->l_entry += l->l_addr;
 
+  if (_dl_debug_files)
+    {
+      const size_t nibbles = sizeof (void *) * 2;
+      char buf1[nibbles + 1];
+      char buf2[nibbles + 1];
+      char buf3[nibbles + 1];
+
+      buf1[nibbles] = '\0';
+      buf2[nibbles] = '\0';
+      buf3[nibbles] = '\0';
+
+      memset (buf1, '0', nibbles);
+      memset (buf2, '0', nibbles);
+      memset (buf3, '0', nibbles);
+      _itoa_word ((unsigned long int) l->l_ld, &buf1[nibbles], 16, 0);
+      _itoa_word ((unsigned long int) l->l_addr, &buf2[nibbles], 16, 0);
+      _itoa_word (maplength, &buf3[nibbles], 16, 0);
+
+      _dl_debug_message (1, "  dynamic: 0x", buf1, "  base: 0x", buf2,
+			 "   size: 0x", buf3, "\n", NULL);
+      memset (buf1, '0', nibbles);
+      memset (buf2, '0', nibbles);
+      memset (buf3, ' ', nibbles);
+      _itoa_word ((unsigned long int) l->l_entry, &buf1[nibbles], 16, 0);
+      _itoa_word ((unsigned long int) l->l_phdr, &buf2[nibbles], 16, 0);
+      _itoa_word (l->l_phnum, &buf3[nibbles], 10, 0);
+      _dl_debug_message (1, "    entry: 0x", buf1, "  phdr: 0x", buf2,
+			 "  phnum:   ", buf3, "\n\n", NULL);
+    }
+
   elf_get_dynamic_info (l->l_ld, l->l_info);
   if (l->l_info[DT_HASH])
     _dl_setup_hash (l);
@@ -800,7 +838,7 @@ print_search_path (struct r_search_path_elem **list,
 {
   int first = 1;
 
-  _dl_debug_message ("\t search path=", NULL);
+  _dl_debug_message (1, " search path=", NULL);
 
   while (*list != NULL && (*list)->what == what) /* Yes, ==.  */
     {
@@ -809,23 +847,23 @@ print_search_path (struct r_search_path_elem **list,
       if ((*list)->machdirstatus != nonexisting)
 	{
 	  buf[(*list)->machdirnamelen - 1] = '\0';
-	  _dl_debug_message (first ? "" : ":", buf, NULL);
+	  _dl_debug_message (0, first ? "" : ":", buf, NULL);
 	  first = 0;
 	}
       if ((*list)->dirstatus != nonexisting)
 	{
 	  buf[(*list)->dirnamelen - 1] = '\0';
-	  _dl_debug_message (first ? "" : ":", buf, NULL);
+	  _dl_debug_message (0, first ? "" : ":", buf, NULL);
 	  first = 0;
 	}
       ++list;
     }
 
   if (name != NULL)
-    _dl_debug_message ("\t\t(", what, " from file ",
+    _dl_debug_message (0, "\t\t(", what, " from file ",
 			name[0] ? name : _dl_argv[0], ")\n", NULL);
   else
-    _dl_debug_message ("\t\t(", what, ")\n", NULL);
+    _dl_debug_message (0, "\t\t(", what, ")\n", NULL);
 }
 
 /* Try to open NAME in one of the directories in DIRS.
@@ -871,7 +909,7 @@ open_path (const char *name, size_t namelen, int preloaded,
 
           /* Print name we try if this is wanted.  */
 	  if (_dl_debug_libs)
-	    _dl_debug_message ("\t  trying file=", buf, "\n", NULL);
+	    _dl_debug_message (1, "  trying file=", buf, "\n", NULL);
 
 	  fd = __open (buf, O_RDONLY);
 	  if (this_dir->machdirstatus == unknown)
@@ -926,7 +964,7 @@ open_path (const char *name, size_t namelen, int preloaded,
 
 	  /* Print name we try if this is wanted.  */
 	  if (_dl_debug_libs)
-	    _dl_debug_message ("\t  trying file=", buf, "\n", NULL);
+	    _dl_debug_message (1, "  trying file=", buf, "\n", NULL);
 
 	  fd = __open (buf, O_RDONLY);
 	  if (this_dir->dirstatus == unknown)
@@ -1038,6 +1076,12 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
       return l;
     }
 
+  /* Display information if we are debugging.  */
+  if (_dl_debug_files && loader != NULL)
+    _dl_debug_message (1, "\nfile=", name, ";  needed by ",
+		       loader->l_name[0] ? loader->l_name : _dl_argv[0],
+		       "\n", NULL);
+
   if (strchr (name, '/') == NULL)
     {
       /* Search for NAME in several places.  */
@@ -1045,7 +1089,7 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
       size_t namelen = strlen (name) + 1;
 
       if (_dl_debug_libs)
-	_dl_debug_message ("\tfind library=", name, "; searching\n", NULL);
+	_dl_debug_message (1, "find library=", name, "; searching\n", NULL);
 
       fd = -1;
 
@@ -1109,7 +1153,7 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
 
       /* Add another newline when we a tracing the library loading.  */
       if (_dl_debug_libs)
-        _dl_debug_message ("\n", NULL);
+        _dl_debug_message (1, "\n", NULL);
     }
   else
     {
diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c
index 95399ba..f2cd981 100644
--- a/elf/dl-lookup.c
+++ b/elf/dl-lookup.c
@@ -100,7 +100,7 @@ do_lookup (const char *undef_name, unsigned long int hash,
 
       /* Print some debugging info if wanted.  */
       if (_dl_debug_symbols)
-	_dl_debug_message ("\tsymbol=", undef_name, ";  lookup in file=",
+	_dl_debug_message (1, "symbol=", undef_name, ";  lookup in file=",
 			   map->l_name[0] ? map->l_name : _dl_argv[0],
 			   "\n", NULL);
 
@@ -236,7 +236,7 @@ _dl_lookup_symbol (const char *undef_name, const ElfW(Sym) **ref,
     }
 
   if (_dl_debug_bindings)
-    _dl_debug_message ("\tbinding file ", reference_name, " to ",
+    _dl_debug_message (1, "binding file ", reference_name, " to ",
 		       current_value.m->l_name[0]
 		       ? current_value.m->l_name : _dl_argv[0],
 		       ": symbol `", undef_name, "'\n", NULL);
@@ -281,7 +281,7 @@ _dl_lookup_symbol_skip (const char *undef_name, const ElfW(Sym) **ref,
     }
 
   if (_dl_debug_bindings)
-    _dl_debug_message ("\tbinding file ", reference_name, " to ",
+    _dl_debug_message (1, "binding file ", reference_name, " to ",
 		       current_value.m->l_name[0]
 		       ? current_value.m->l_name : _dl_argv[0],
 		       ": symbol `", undef_name, "'\n", NULL);
@@ -342,7 +342,7 @@ _dl_lookup_versioned_symbol (const char *undef_name, const ElfW(Sym) **ref,
     }
 
   if (_dl_debug_bindings)
-    _dl_debug_message ("\tbinding file ", reference_name, " to ",
+    _dl_debug_message (1, "binding file ", reference_name, " to ",
 		       current_value.m->l_name[0]
 		       ? current_value.m->l_name : _dl_argv[0],
 		       ": symbol `", undef_name, "' [", version->name,
@@ -396,7 +396,7 @@ _dl_lookup_versioned_symbol_skip (const char *undef_name,
     }
 
   if (_dl_debug_bindings)
-    _dl_debug_message ("\tbinding file ", reference_name, " to ",
+    _dl_debug_message (1, "binding file ", reference_name, " to ",
 		       current_value.m->l_name[0]
 		       ? current_value.m->l_name : _dl_argv[0],
 		       ": symbol `", undef_name, "' [", version->name,
diff --git a/elf/dl-misc.c b/elf/dl-misc.c
index 9028852..1e13d0d 100644
--- a/elf/dl-misc.c
+++ b/elf/dl-misc.c
@@ -22,8 +22,10 @@
 #include <unistd.h>
 #include <stdarg.h>
 #include <string.h>
+#include <unistd.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
+#include <stdio-common/_itoa.h>
 
 #ifndef MAP_ANON
 /* This is the only dl-sysdep.c function that is actually needed at run-time
@@ -89,6 +91,54 @@ _dl_sysdep_output (int fd, const char *msg, ...)
       size_t len = strlen (msg);
       __write (fd, msg, len);
       msg = va_arg (ap, const char *);
-    } while (msg);
+    }
+  while (msg != NULL);
+  va_end (ap);
+}
+
+
+void
+_dl_debug_message (int new_line, const char *msg, ...)
+{
+  /* We print the strings we get passed one after the other but start all
+     lines using the current PID.  */
+  static int pid;
+  va_list ap;
+
+  if (pid == 0)
+    pid = getpid ();
+
+  va_start (ap, msg);
+  do
+    if (msg[0] == '\0')
+      /* Get the next argument.  */
+      msg = va_arg (ap, const char *);
+    else
+      {
+	const char *endp;
+
+	/* We actually will print something in this line.  So print the
+	   PID now if needed.  */
+	if (new_line)
+	  {
+	    char buf[7] = "00000:\t";
+	    __write (_dl_debug_fd, _itoa_word (pid, &buf[5], 10, 0), 7);
+	    new_line = 0;
+	  }
+
+	endp = strchr (msg, '\n');
+	if (endp == NULL)
+	  {
+	    __write (_dl_debug_fd, msg, strlen (msg));
+	    msg = va_arg (ap, const char *);
+	  }
+	else
+	  {
+	    __write (_dl_debug_fd, msg, endp - msg + 1);
+	    msg = endp + 1;
+	    new_line = 1;
+	  }
+      }
+  while (msg != NULL);
   va_end (ap);
 }
diff --git a/elf/dl-reloc.c b/elf/dl-reloc.c
index 531da96..d38c6c1 100644
--- a/elf/dl-reloc.c
+++ b/elf/dl-reloc.c
@@ -32,6 +32,10 @@ _dl_relocate_object (struct link_map *l, struct link_map *scope[], int lazy)
   if (l->l_relocated)
     return;
 
+  if (_dl_debug_reloc)
+    _dl_debug_message (1, "\nrelocation processing: ",
+		       l->l_name[0] ? l->l_name : _dl_argv[0], "\n", NULL);
+
   if (l->l_info[DT_TEXTREL])
     {
       /* Bletch.  We must make read-only segments writable
diff --git a/elf/dl-support.c b/elf/dl-support.c
index 39fa47c..0f3a4c5 100644
--- a/elf/dl-support.c
+++ b/elf/dl-support.c
@@ -39,6 +39,9 @@ int _dl_debug_libs;
 int _dl_debug_impcalls;
 int _dl_debug_bindings;
 int _dl_debug_symbols;
+int _dl_debug_versions;
+int _dl_debug_reloc;
+int _dl_debug_files;
 
 /* If nonzero print warnings about problematic situations.  */
 int _dl_verbose;
diff --git a/elf/dl-version.c b/elf/dl-version.c
index f615bb0..a8bdeef 100644
--- a/elf/dl-version.c
+++ b/elf/dl-version.c
@@ -79,6 +79,12 @@ match_symbol (const char *name, ElfW(Word) hash, const char *string,
   ElfW(Addr) def_offset;
   ElfW(Verdef) *def;
 
+  /* Display information about what we are doing while debugging.  */
+  if (_dl_debug_versions)
+    _dl_debug_message (1, "checking for version `", string, "' in file ",
+		       map->l_name[0] ? map->l_name : _dl_argv[0],
+		       " required by file ", name, "\n", NULL);
+
   if (map->l_info[VERSTAG (DT_VERDEF)] == NULL)
     {
       /* The file has no symbol versioning.  I.e., the dependent
diff --git a/elf/link.h b/elf/link.h
index b2eb572..bd9b9e4 100644
--- a/elf/link.h
+++ b/elf/link.h
@@ -253,6 +253,9 @@ extern int _dl_debug_libs;
 extern int _dl_debug_impcalls;
 extern int _dl_debug_bindings;
 extern int _dl_debug_symbols;
+extern int _dl_debug_versions;
+extern int _dl_debug_reloc;
+extern int _dl_debug_files;
 
 /* File deccriptor to write debug messages to.  */
 extern int _dl_debug_fd;
@@ -267,9 +270,10 @@ extern void _dl_sysdep_output (int fd, const char *string, ...);
 
 /* OS-dependent function to write a debug message on the specified
    descriptor for this.  All arguments are `const char *'; args until
-   a null pointer are concatenated to form the message to print.  */
-#define _dl_debug_message(string, args...) \
-  _dl_sysdep_output (_dl_debug_fd, string, ##args)
+   a null pointer are concatenated to form the message to print.  If
+   NEW_LINE is nonzero it is assumed that the message starts on a new
+   line.*/
+extern void _dl_debug_message (int new_line, const char *string, ...);
 
 /* OS-dependent function to write a message on the standard output.
    All arguments are `const char *'; args until a null pointer
diff --git a/elf/rtld.c b/elf/rtld.c
index 2db6cf3..8b72d07 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -78,6 +78,9 @@ int _dl_debug_libs;
 int _dl_debug_impcalls;
 int _dl_debug_bindings;
 int _dl_debug_symbols;
+int _dl_debug_versions;
+int _dl_debug_reloc;
+int _dl_debug_files;
 
 /* Set nonzero during loading and initialization of executable and
    libraries, cleared before the executable's entry point runs.  This
@@ -927,21 +930,21 @@ process_dl_debug (char *dl_debug)
 	++dl_debug;
       if (*dl_debug != '\0')
 	{
-	  if (strncmp (dl_debug, "bindings", 8) == 0
-	      && (issep (dl_debug[8]) || dl_debug[8] == '\0'))
+	  if (strncmp (dl_debug, "files", 5) == 0
+	      && (issep (dl_debug[5]) || dl_debug[5] == '\0'))
 	    {
-	      _dl_debug_bindings = 1;
+	      _dl_debug_files = 1;
 	      _dl_debug_impcalls = 1;
 	      any_debug = 1;
-	      dl_debug += 8;
+	      dl_debug += 5;
 	    }
-	  else if (strncmp (dl_debug, "libs", 4) == 0
-	      && (issep (dl_debug[4]) || dl_debug[4] == '\0'))
+	  else if (strncmp (dl_debug, "bindings", 8) == 0
+	      && (issep (dl_debug[8]) || dl_debug[8] == '\0'))
 	    {
-	      _dl_debug_libs = 1;
+	      _dl_debug_bindings = 1;
 	      _dl_debug_impcalls = 1;
 	      any_debug = 1;
-	      dl_debug += 4;
+	      dl_debug += 8;
 	    }
 	  else if (strncmp (dl_debug, "help", 4) == 0
 		   && (issep (dl_debug[4]) || dl_debug[4] == '\0'))
@@ -950,15 +953,34 @@ process_dl_debug (char *dl_debug)
 Valid options for the LD_DEBUG environment variable are:\n\
 \n\
   bindings  display information about symbol binding\n\
+  files     display processing of files and libraries\n\
   help      display this help message and exit\n\
   libs      display library search paths\n\
+  reloc     display relocation processing\n\
   symbols   display symbol table processing\n\
+  versions  display version dependencies\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, "libs", 4) == 0
+	      && (issep (dl_debug[4]) || dl_debug[4] == '\0'))
+	    {
+	      _dl_debug_libs = 1;
+	      _dl_debug_impcalls = 1;
+	      any_debug = 1;
+	      dl_debug += 4;
+	    }
+	  else if (strncmp (dl_debug, "reloc", 4) == 0
+	      && (issep (dl_debug[5]) || dl_debug[5] == '\0'))
+	    {
+	      _dl_debug_reloc = 1;
+	      _dl_debug_impcalls = 1;
+	      any_debug = 1;
+	      dl_debug += 5;
+	    }
 	  else if (strncmp (dl_debug, "symbols", 7) == 0
 	      && (issep (dl_debug[7]) || dl_debug[7] == '\0'))
 	    {
@@ -967,6 +989,14 @@ a filename can be specified using the LD_DEBUG_OUTPUT environment variable.\n",
 	      any_debug = 1;
 	      dl_debug += 7;
 	    }
+	  else if (strncmp (dl_debug, "versions", 8) == 0
+	      && (issep (dl_debug[8]) || dl_debug[8] == '\0'))
+	    {
+	      _dl_debug_versions = 1;
+	      _dl_debug_impcalls = 1;
+	      any_debug = 1;
+	      dl_debug += 8;
+	    }
 	  else
 	    {
 	      /* Display a warning and skip everything until next