* elf/tst-tls-dlinfo.c: New file.

* elf/Makefile (tests): Add it.
	($(objpfx)tst-tls-dlinfo): Depend on $(libdl).
	($(objpfx)tst-tls-dlinfo.out): Depend on $(objpfx)tst-tlsmod2.so.

	* dlfcn/dlfcn.h (RTLD_DI_PROFILENAME, RTLD_DI_PROFILEOUT): New enum
	values, reserve unsupported requested names used on Solaris.
	(RTLD_DI_TLS_MODID, RTLD_DI_TLS_DATA): New enum values.
	(RTLD_DI_MAX): Likewise.
	* dlfcn/dlinfo.c (dlinfo_doit): Handle RTLD_DI_TLS_MODID and
	RTLD_DI_TLS_DATA.

	* elf/dl-tls.c (_dl_tls_get_addr_soft): New function.
	* sysdeps/generic/ldsodefs.h: Declare it.
	* elf/Versions (ld: GLIBC_PRIVATE): Add it.
	* elf/link.h (struct dl_phdr_info): New members dlpi_tls_modid,
	dlpi_tls_data.
	* elf/dl-iteratephdr.c (__dl_iterate_phdr): Fill them in.

	* include/link.h: Don't copy contents from elf/link.h.
	Instead, #include it while #define'ing around link_map.
	* elf/dl-debug.c (_dl_debug_initialize): Add a cast.
	Add bogus extern decl to verify link_map members.
	* elf/loadtest.c (MAPS): New macro, cast _r_debug._r_map.
	(OUT, main): Use it in place of _r_debug._r_map.
	* elf/unload.c: Likewise.
	* elf/unload2.c: Likewise.
	* elf/neededtest.c (check_loaded_objects): Likewise.
	* elf/neededtest2.c (check_loaded_objects): Likewise.
	* elf/neededtest3.c (check_loaded_objects): Likewise.
	* elf/neededtest4.c (check_loaded_objects): Likewise.
	* elf/circleload1.c (check_loaded_objects): Likewise.

ChangeLog

@@ -1,5 +1,38 @@
 2006-02-28  Roland McGrath  <roland@redhat.com>
 
+	* elf/tst-tls-dlinfo.c: New file.
+	* elf/Makefile (tests): Add it.
+	($(objpfx)tst-tls-dlinfo): Depend on $(libdl).
+	($(objpfx)tst-tls-dlinfo.out): Depend on $(objpfx)tst-tlsmod2.so.
+
+	* dlfcn/dlfcn.h (RTLD_DI_PROFILENAME, RTLD_DI_PROFILEOUT): New enum
+	values, reserve unsupported requested names used on Solaris.
+	(RTLD_DI_TLS_MODID, RTLD_DI_TLS_DATA): New enum values.
+	(RTLD_DI_MAX): Likewise.
+	* dlfcn/dlinfo.c (dlinfo_doit): Handle RTLD_DI_TLS_MODID and
+	RTLD_DI_TLS_DATA.
+
+	* elf/dl-tls.c (_dl_tls_get_addr_soft): New function.
+	* sysdeps/generic/ldsodefs.h: Declare it.
+	* elf/Versions (ld: GLIBC_PRIVATE): Add it.
+	* elf/link.h (struct dl_phdr_info): New members dlpi_tls_modid,
+	dlpi_tls_data.
+	* elf/dl-iteratephdr.c (__dl_iterate_phdr): Fill them in.
+
+	* include/link.h: Don't copy contents from elf/link.h.
+	Instead, #include it while #define'ing around link_map.
+	* elf/dl-debug.c (_dl_debug_initialize): Add a cast.
+	Add bogus extern decl to verify link_map members.
+	* elf/loadtest.c (MAPS): New macro, cast _r_debug._r_map.
+	(OUT, main): Use it in place of _r_debug._r_map.
+	* elf/unload.c: Likewise.
+	* elf/unload2.c: Likewise.
+	* elf/neededtest.c (check_loaded_objects): Likewise.
+	* elf/neededtest2.c (check_loaded_objects): Likewise.
+	* elf/neededtest3.c (check_loaded_objects): Likewise.
+	* elf/neededtest4.c (check_loaded_objects): Likewise.
+	* elf/circleload1.c (check_loaded_objects): Likewise.
+
 	* nscd/nscd_helper.c: Include <time.h> for `time' declaration.
 
 	* include/fcntl.h: Declare __openat, __open64.  Use libc_hidden_proto.

dlfcn/dlfcn.h

@@ -1,5 +1,6 @@
 /* User functions for run-time dynamic loading.
-   Copyright (C) 1995-1999,2000,2001,2003,2004 Free Software Foundation, Inc.
+   Copyright (C) 1995-1999,2000,2001,2003,2004,2006
+	Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -135,6 +136,8 @@ enum
        store the `struct link_map *' for HANDLE there.  */
     RTLD_DI_LINKMAP = 2,
 
+    RTLD_DI_CONFIGADDR = 3,	/* Unsupported, defined by Solaris.  */
+
     /* Treat ARG as `Dl_serinfo *' (see below), and fill in to describe the
        directories that will be searched for dependencies of this object.
        RTLD_DI_SERINFOSIZE fills in just the `dls_cnt' and `dls_size'
@@ -147,7 +150,21 @@ enum
        expand $ORIGIN in this shared object's dependency file names.  */
     RTLD_DI_ORIGIN = 6,
 
-    RTLD_DI_CONFIGADDR = 3	/* Unsupported, defined by Solaris.  */
+    RTLD_DI_PROFILENAME = 7,	/* Unsupported, defined by Solaris.  */
+    RTLD_DI_PROFILEOUT = 8,	/* Unsupported, defined by Solaris.  */
+
+    /* Treat ARG as `size_t *', and store there the TLS module ID
+       of this object's PT_TLS segment, as used in TLS relocations;
+       store zero if this object does not define a PT_TLS segment.  */
+    RTLD_DI_TLS_MODID = 9,
+
+    /* Treat ARG as `void **', and store there a pointer to the calling
+       thread's TLS block corresponding to this object's PT_TLS segment.
+       Store a null pointer if this object does not define a PT_TLS
+       segment, or if the calling thread has not allocated a block for it.  */
+    RTLD_DI_TLS_DATA = 10,
+
+    RTLD_DI_MAX = 10,
   };
 
 

dlfcn/dlinfo.c

@@ -1,5 +1,5 @@
 /* dlinfo -- Get information from the dynamic linker.
-   Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -32,6 +32,10 @@ dlinfo (void *handle, int request, void *arg)
 
 #else
 
+# ifdef USE_TLS
+#  include <dl-tls.h>
+# endif
+
 struct dlinfo_args
 {
   ElfW(Addr) caller;
@@ -90,6 +94,24 @@ RTLD_SELF used in code not dynamically loaded"));
     case RTLD_DI_ORIGIN:
       strcpy (args->arg, l->l_origin);
       break;
+
+    case RTLD_DI_TLS_MODID:
+      *(size_t *) args->arg = 0;
+#ifdef USE_TLS
+      *(size_t *) args->arg = l->l_tls_modid;
+#endif
+      break;
+
+    case RTLD_DI_TLS_DATA:
+      {
+	void *data = NULL;
+#ifdef USE_TLS
+	if (l->l_tls_modid != 0)
+	  data = _dl_tls_get_addr_soft (l);
+#endif
+	*(void **) args->arg = data;
+	break;
+      }
     }
 }
 

elf/Makefile

@@ -163,9 +163,11 @@ tests += loadtest restest1 preloadtest loadfail multiload origtest resolvfail \
 	 neededtest3 neededtest4 unload2 lateglobal initfirst global \
 	 restest2 next dblload dblunload reldep5 reldep6 reldep7 reldep8 \
 	 circleload1 tst-tls3 tst-tls4 tst-tls5 tst-tls6 tst-tls7 tst-tls8 \
-	 tst-tls10 tst-tls11 tst-tls12 tst-tls13 tst-tls14 tst-tls15 tst-align \
+	 tst-tls10 tst-tls11 tst-tls12 tst-tls13 tst-tls14 tst-tls15 \
-	 tst-align2 $(tests-execstack-$(have-z-execstack)) tst-dlmodcount \
+	 tst-tls-dlinfo \
-	 tst-dlopenrpath tst-deep1 tst-dlmopen1 tst-dlmopen2 tst-dlmopen3 \
+	 tst-align tst-align2 $(tests-execstack-$(have-z-execstack)) \
+	 tst-dlmodcount tst-dlopenrpath tst-deep1 \
+	 tst-dlmopen1 tst-dlmopen2 tst-dlmopen3 \
 	 unload3 unload4 unload5 unload6 tst-audit1 tst-global1 order2 \
 	 tst-stackguard1
 #	 reldep9
@@ -700,6 +702,11 @@ $(objpfx)tst-tls14.out: $(objpfx)tst-tlsmod14b.so
 $(objpfx)tst-tls15: $(libdl)
 $(objpfx)tst-tls15.out: $(objpfx)tst-tlsmod15a.so $(objpfx)tst-tlsmod15b.so
 
+$(objpfx)tst-tls-dlinfo: $(libdl)
+$(objpfx)tst-tls-dlinfo.out: $(objpfx)tst-tlsmod2.so
+
+
+
 CFLAGS-tst-align.c = $(stack-align-test-flags)
 CFLAGS-tst-align2.c = $(stack-align-test-flags)
 CFLAGS-tst-alignmod.c = $(stack-align-test-flags)

elf/Versions

@@ -57,6 +57,7 @@ ld {
     _dl_allocate_tls; _dl_deallocate_tls;
     _dl_get_tls_static_info; _dl_allocate_tls_init;
     _dl_tls_setup; _dl_rtld_di_serinfo;
+    _dl_tls_get_addr_soft;
     _dl_make_stack_executable;
     # Only here for gdb while a better method is developed.
     _dl_debug_state;

elf/circleload1.c

@@ -5,6 +5,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#define MAPS ((struct link_map *) _r_debug.r_map)
+
 static int
 check_loaded_objects (const char **loaded)
 {
@@ -24,7 +26,7 @@ check_loaded_objects (const char **loaded)
 
   printf("   Name\n");
   printf(" --------------------------------------------------------\n");
-  for (lm = _r_debug.r_map; lm; lm = lm->l_next)
+  for (lm = MAPS; lm; lm = lm->l_next)
     {
       if (lm->l_name && lm->l_name[0])
 	printf(" %s, count = %d\n", lm->l_name, (int) lm->l_direct_opencount);

elf/dl-debug.c

@@ -1,5 +1,6 @@
 /* Communicate dynamic linker state to the debugger at runtime.
-   Copyright (C) 1996, 1998,2000,2002,2004,2005 Free Software Foundation, Inc.
+   Copyright (C) 1996, 1998,2000,2002,2004,2005,2006
+	Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -19,6 +20,18 @@
 
 #include <ldsodefs.h>
 
+
+/* These are the members in the public `struct link_map' type.
+   Sanity check that the internal type and the public type match.  */
+#define VERIFY_MEMBER(name) \
+  (offsetof (struct link_map_public, name) == offsetof (struct link_map, name))
+extern const int verify_link_map_members[(VERIFY_MEMBER (l_addr)
+					  && VERIFY_MEMBER (l_name)
+					  && VERIFY_MEMBER (l_ld)
+					  && VERIFY_MEMBER (l_next)
+					  && VERIFY_MEMBER (l_prev))
+					 ? 1 : -1];
+
 /* This structure communicates dl state to the debugger.  The debugger
    normally finds it via the DT_DEBUG entry in the dynamic section, but in
    a statically-linked program there is no dynamic section for the debugger
@@ -46,7 +59,7 @@ _dl_debug_initialize (ElfW(Addr) ldbase, Lmid_t ns)
       /* Tell the debugger where to find the map of loaded objects.  */
       r->r_version = 1	/* R_DEBUG_VERSION XXX */;
       r->r_ldbase = ldbase ?: _r_debug.r_ldbase;
-      r->r_map = GL(dl_ns)[ns]._ns_loaded;
+      r->r_map = (void *) GL(dl_ns)[ns]._ns_loaded;
       r->r_brk = (ElfW(Addr)) &_dl_debug_state;
     }
 

elf/dl-iteratephdr.c

@@ -1,5 +1,5 @@
 /* Get loaded objects program headers.
-   Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2001,2002,2003,2004,2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Jakub Jelinek <jakub@redhat.com>, 2001.
 
@@ -68,6 +68,13 @@ __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
       info.dlpi_phnum = l->l_phnum;
       info.dlpi_adds = GL(dl_load_adds);
       info.dlpi_subs = GL(dl_load_adds) - nloaded;
+      info.dlpi_tls_modid = 0;
+      info.dlpi_tls_data = NULL;
+#ifdef USE_TLS
+      info.dlpi_tls_modid = l->l_tls_modid;
+      if (info.dlpi_tls_modid != 0)
+	info.dlpi_tls_data = _dl_tls_get_addr_soft (l);
+#endif
       ret = callback (&info, sizeof (struct dl_phdr_info), data);
       if (ret)
 	break;

elf/dl-tls.c

@@ -1,5 +1,5 @@
 /* Thread-local storage handling in the ELF dynamic linker.  Generic version.
-   Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2002,2003,2004,2005,2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -735,9 +735,53 @@ __tls_get_addr (GET_ADDR_ARGS)
 # endif
 
 
+/* Look up the module's TLS block as for __tls_get_addr,
+   but never touch anything.  Return null if it's not allocated yet.  */
+void *
+internal_function
+_dl_tls_get_addr_soft (struct link_map *l)
+{
+  if (__builtin_expect (l->l_tls_modid == 0, 0))
+    /* This module has no TLS segment.  */
+    return NULL;
+
+  dtv_t *dtv = THREAD_DTV ();
+  if (__builtin_expect (dtv[0].counter != GL(dl_tls_generation), 0))
+    {
+      /* This thread's DTV is not completely current,
+	 but it might already cover this module.  */
+
+      if (l->l_tls_modid >= dtv[-1].counter)
+	/* Nope.  */
+	return NULL;
+
+      size_t idx = l->l_tls_modid;
+      struct dtv_slotinfo_list *listp = GL(dl_tls_dtv_slotinfo_list);
+      while (idx >= listp->len)
+	{
+	  idx -= listp->len;
+	  listp = listp->next;
+	}
+
+      /* We've reached the slot for this module.
+	 If its generation counter is higher than the DTV's,
+	 this thread does not know about this module yet.  */
+      if (dtv[0].counter < listp->slotinfo[idx].gen)
+	return NULL;
+    }
+
+  void *data = dtv[l->l_tls_modid].pointer.val;
+  if (__builtin_expect (data == TLS_DTV_UNALLOCATED, 0))
+    /* The DTV is current, but this thread has not yet needed
+       to allocate this module's segment.  */
+    data = NULL;
+
+  return data;
+}
+
 
 void
-_dl_add_to_slotinfo (struct link_map  *l)
+_dl_add_to_slotinfo (struct link_map *l)
 {
   /* Now that we know the object is loaded successfully add
      modules containing TLS data to the dtv info table.  We

elf/link.h

@@ -1,6 +1,6 @@
 /* Data structure for communication from the run-time dynamic linker for
    loaded ELF shared objects.
-   Copyright (C) 1995-2001, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 1995-2001, 2004, 2005, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -135,7 +135,6 @@ enum
 				   la_symbind call.  */
   };
 
-
 struct dl_phdr_info
   {
     ElfW(Addr) dlpi_addr;
@@ -143,15 +142,24 @@ struct dl_phdr_info
     const ElfW(Phdr) *dlpi_phdr;
     ElfW(Half) dlpi_phnum;
 
-    /* Note: the next two members were introduced after the first
+    /* Note: Following members were introduced after the first
        version of this structure was available.  Check the SIZE
-       argument passed to the dl_iterate_phdr() callback to determine
+       argument passed to the dl_iterate_phdr callback to determine
-       whether or not they are provided.  */
+       whether or not each later member is available.  */
 
     /* Incremented when a new object may have been added.  */
     unsigned long long int dlpi_adds;
     /* Incremented when an object may have been removed.  */
     unsigned long long int dlpi_subs;
+
+    /* If there is a PT_TLS segment, its module ID as used in
+       TLS relocations, else zero.  */
+    size_t dlpi_tls_modid;
+
+    /* The address of the calling thread's instance of this module's
+       PT_TLS segment, if it has one and it has been allocated
+       in the calling thread, otherwise a null pointer.  */
+    void *dlpi_tls_data;
   };
 
 __BEGIN_DECLS

elf/loadtest.c

@@ -70,8 +70,10 @@ static const struct
 
 #include <include/link.h>
 
+#define MAPS ((struct link_map *) _r_debug.r_map)
+
 #define OUT \
-  for (map = _r_debug.r_map; map != NULL; map = map->l_next)		      \
+  for (map = MAPS; map != NULL; map = map->l_next)		      \
     if (map->l_type == lt_loaded)					      \
       printf ("name = \"%s\", direct_opencount = %d\n",			      \
 	      map->l_name, (int) map->l_direct_opencount);		      \
@@ -147,7 +149,7 @@ main (int argc, char *argv[])
 	    {
 	      /* In this case none of the objects above should be
 		 present.  */
-	      for (map = _r_debug.r_map; map != NULL; map = map->l_next)
+	      for (map = MAPS; map != NULL; map = map->l_next)
 		if (map->l_type == lt_loaded
 		    && (strstr (map->l_name, testobjs[0].name) != NULL
 			|| strstr (map->l_name, testobjs[1].name) != NULL
@@ -180,7 +182,7 @@ main (int argc, char *argv[])
       }
 
   /* Check whether all files are unloaded.  */
-  for (map = _r_debug.r_map; map != NULL; map = map->l_next)
+  for (map = MAPS; map != NULL; map = map->l_next)
     if (map->l_type == lt_loaded)
       {
 	printf ("name = \"%s\", direct_opencount = %d\n",

elf/neededtest.c

@@ -5,6 +5,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#define MAPS ((struct link_map *) _r_debug.r_map)
+
 static int
 check_loaded_objects (const char **loaded)
 {
@@ -24,7 +26,7 @@ check_loaded_objects (const char **loaded)
 
   printf("   Name\n");
   printf(" --------------------------------------------------------\n");
-  for (lm = _r_debug.r_map; lm; lm = lm->l_next)
+  for (lm = MAPS; lm; lm = lm->l_next)
     {
       if (lm->l_name && lm->l_name[0])
 	printf(" %s, count = %d\n", lm->l_name, (int) lm->l_direct_opencount);

elf/neededtest2.c

@@ -5,6 +5,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#define MAPS ((struct link_map *) _r_debug.r_map)
+
 static int
 check_loaded_objects (const char **loaded)
 {
@@ -24,7 +26,7 @@ check_loaded_objects (const char **loaded)
 
   printf("   Name\n");
   printf(" --------------------------------------------------------\n");
-  for (lm = _r_debug.r_map; lm; lm = lm->l_next)
+  for (lm = MAPS; lm; lm = lm->l_next)
     {
       if (lm->l_name && lm->l_name[0])
 	printf(" %s, count = %d\n", lm->l_name, (int) lm->l_direct_opencount);

elf/neededtest3.c

@@ -5,6 +5,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#define MAPS ((struct link_map *) _r_debug.r_map)
+
 static int
 check_loaded_objects (const char **loaded)
 {
@@ -24,7 +26,7 @@ check_loaded_objects (const char **loaded)
 
   printf("   Name\n");
   printf(" --------------------------------------------------------\n");
-  for (lm = _r_debug.r_map; lm; lm = lm->l_next)
+  for (lm = MAPS; lm; lm = lm->l_next)
     {
       if (lm->l_name && lm->l_name[0])
 	printf(" %s, count = %d\n", lm->l_name, (int) lm->l_direct_opencount);

elf/neededtest4.c

@@ -5,6 +5,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#define MAPS ((struct link_map *) _r_debug.r_map)
+
 static int
 check_loaded_objects (const char **loaded)
 {
@@ -24,7 +26,7 @@ check_loaded_objects (const char **loaded)
 
   printf("   Name\n");
   printf(" --------------------------------------------------------\n");
-  for (lm = _r_debug.r_map; lm; lm = lm->l_next)
+  for (lm = MAPS; lm; lm = lm->l_next)
     {
       if (lm->l_name && lm->l_name[0])
 	printf(" %s, count = %d\n", lm->l_name, (int) lm->l_direct_opencount);

elf/tst-tls-dlinfo.c

@@ -0,0 +1,92 @@
+#include <dlfcn.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <tls.h>
+
+
+#define TEST_FUNCTION do_test ()
+static int
+do_test (void)
+{
+#ifdef USE_TLS
+  static const char modname[] = "tst-tlsmod2.so";
+  int result = 0;
+  int *foop;
+  int (*fp) (int, int *);
+  void *h;
+
+  h = dlopen (modname, RTLD_LAZY);
+  if (h == NULL)
+    {
+      printf ("cannot open '%s': %s\n", modname, dlerror ());
+      exit (1);
+    }
+
+  fp = dlsym (h, "in_dso");
+  if (fp == NULL)
+    {
+      printf ("cannot get symbol 'in_dso': %s\n", dlerror ());
+      exit (1);
+    }
+
+  size_t modid = -1;
+  if (dlinfo (h, RTLD_DI_TLS_MODID, &modid))
+    {
+      printf ("dlinfo RTLD_DI_TLS_MODID failed: %s\n", dlerror ());
+      result = 1;
+    }
+  else
+    printf ("dlinfo says TLS module ID %Zu\n", modid);
+
+  void *block;
+  if (dlinfo (h, RTLD_DI_TLS_DATA, &block))
+    {
+      printf ("dlinfo RTLD_DI_TLS_DATA failed: %s\n", dlerror ());
+      result = 1;
+    }
+  else if (block != NULL)
+    {
+      printf ("dlinfo RTLD_DI_TLS_DATA says %p but should be unallocated\n",
+	      block);
+      result = 1;
+    }
+
+  result |= fp (0, NULL);
+
+  foop = dlsym (h, "foo");
+  if (foop == NULL)
+    {
+      printf ("cannot get symbol 'foo' the second time: %s\n", dlerror ());
+      exit (1);
+    }
+  if (*foop != 16)
+    {
+      puts ("foo != 16");
+      result = 1;
+    }
+
+  /* Now the module's TLS block has been used and should appear.  */
+  if (dlinfo (h, RTLD_DI_TLS_DATA, &block))
+    {
+      printf ("dlinfo RTLD_DI_TLS_DATA failed the second time: %s\n",
+	      dlerror ());
+      result = 1;
+    }
+  else if (block != foop)
+    {
+      printf ("dlinfo RTLD_DI_TLS_DATA says %p but should be %p\n",
+	      block, foop);
+      result = 1;
+    }
+
+  dlclose (h);
+
+  return result;
+#else
+  return 0;
+#endif
+}
+
+
+#include "../test-skeleton.c"

elf/unload.c

@@ -9,8 +9,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#define MAPS ((struct link_map *) _r_debug.r_map)
+
 #define OUT \
-  for (map = _r_debug.r_map; map != NULL; map = map->l_next)		      \
+  for (map = MAPS; map != NULL; map = map->l_next)			      \
     if (map->l_type == lt_loaded)					      \
       printf ("name = \"%s\", direct_opencount = %d\n",			      \
 	      map->l_name, (int) map->l_direct_opencount);		      \

elf/unload2.c

@@ -6,8 +6,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#define MAPS ((struct link_map *) _r_debug.r_map)
+
 #define OUT \
-  for (map = _r_debug.r_map; map != NULL; map = map->l_next)		      \
+  for (map = MAPS; map != NULL; map = map->l_next)			      \
     if (map->l_type == lt_loaded)					      \
       printf ("name = \"%s\", direct_opencount = %d\n",			      \
 	      map->l_name, (int) map->l_direct_opencount);		      \

include/link.h

@@ -1,6 +1,6 @@
 /* Data structure for communication from the run-time dynamic linker for
    loaded ELF shared objects.
-   Copyright (C) 1995-2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 1995-2002,2003,2004,2005,2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -18,67 +18,32 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
-#ifndef	_LINK_H
+#ifndef	_PRIVATE_LINK_H
-#define	_LINK_H	1
+#define	_PRIVATE_LINK_H	1
+
+#ifdef _LINK_H
+# error this should be impossible
+#endif
+
+/* Get most of the contents from the public header, but we define a
+   different `struct link_map' type for private use.  The la_objopen
+   prototype uses the type, so we have to declare it separately.  */
+#define link_map	link_map_public
+#define la_objopen	la_objopen_wrongproto
+#include <elf/link.h>
+#undef	link_map
+#undef	la_objopen
+
+struct link_map;
+extern unsigned int la_objopen (struct link_map *__map, Lmid_t __lmid,
+				uintptr_t *__cookie);
+
 
-#include <elf.h>
-#include <dlfcn.h>
 #include <stddef.h>
-#include <sys/types.h>
-
-/* We use this macro to refer to ELF types independent of the native wordsize.
-   `ElfW(TYPE)' is used in place of `Elf32_TYPE' or `Elf64_TYPE'.  */
-#define ElfW(type)	_ElfW (Elf, __ELF_NATIVE_CLASS, type)
-#define _ElfW(e,w,t)	_ElfW_1 (e, w, _##t)
-#define _ElfW_1(e,w,t)	e##w##t
-
-#include <bits/elfclass.h>		/* Defines __ELF_NATIVE_CLASS.  */
-#include <bits/link.h>
 #include <bits/linkmap.h>
 #include <dl-lookupcfg.h>
 #include <tls.h>		/* Defines USE_TLS.  */
 
-/* Rendezvous structure used by the run-time dynamic linker to communicate
-   details of shared object loading to the debugger.  If the executable's
-   dynamic section has a DT_DEBUG element, the run-time linker sets that
-   element's value to the address where this structure can be found.  */
-
-struct r_debug
-  {
-    int r_version;		/* Version number for this protocol.  */
-
-    struct link_map *r_map;	/* Head of the chain of loaded objects.  */
-
-    /* This is the address of a function internal to the run-time linker,
-       that will always be called when the linker begins to map in a
-       library or unmap it, and again when the mapping change is complete.
-       The debugger can set a breakpoint at this address if it wants to
-       notice shared object mapping changes.  */
-    ElfW(Addr) r_brk;
-    enum
-      {
-	/* This state value describes the mapping change taking place when
-	   the `r_brk' address is called.  */
-	RT_CONSISTENT,		/* Mapping change is complete.  */
-	RT_ADD,			/* Beginning to add a new object.  */
-	RT_DELETE		/* Beginning to remove an object mapping.  */
-      } r_state;
-
-    ElfW(Addr) r_ldbase;	/* Base address the linker is loaded at.  */
-  };
-
-/* This is the instance of that structure used by the dynamic linker.  */
-extern struct r_debug _r_debug;
-
-/* This symbol refers to the "dynamic structure" in the `.dynamic' section
-   of whatever module refers to `_DYNAMIC'.  So, to find its own
-   `struct r_debug', a program could do:
-     for (dyn = _DYNAMIC; dyn->d_tag != DT_NULL; ++dyn)
-       if (dyn->d_tag == DT_DEBUG)
-	 r_debug = (struct r_debug *) dyn->d_un.d_ptr;
-   */
-extern ElfW(Dyn) _DYNAMIC[];
-
 
 /* Some internal data structures of the dynamic linker used in the
    linker map.  We only provide forward declarations.  */
@@ -316,45 +281,6 @@ struct link_map
     } l_audit[0];
   };
 
-/* Version numbers for la_version handshake interface.  */
-#define LAV_CURRENT	1
-
-/* Activity types signaled through la_activity.  */
-enum
-  {
-    LA_ACT_CONSISTENT,
-    LA_ACT_ADD,
-    LA_ACT_DELETE
-  };
-
-/* Values representing origin of name for dynamic loading.  */
-enum
-  {
-    LA_SER_ORIG = 0x01,		/* Original name.  */
-    LA_SER_LIBPATH = 0x02,	/* Directory from LD_LIBRARY_PATH.  */
-    LA_SER_RUNPATH = 0x04,	/* Directory from RPATH/RUNPATH.  */
-    LA_SER_CONFIG = 0x08,	/* Found through ldconfig.  */
-    LA_SER_DEFAULT = 0x40,	/* Default directory.  */
-    LA_SER_SECURE = 0x80	/* Unused.  */
-  };
-
-/* Values for la_objopen return value.  */
-enum
-  {
-    LA_FLG_BINDTO = 0x01,	/* Audit symbols bound to this object.  */
-    LA_FLG_BINDFROM = 0x02	/* Audit symbols bound from this object.  */
-  };
-
-/* Values for la_symbind flags parameter.  */
-enum
-  {
-    LA_SYMB_NOPLTENTER = 0x01,	/* la_pltenter will not be called.  */
-    LA_SYMB_NOPLTEXIT = 0x02,	/* la_pltexit will not be called.  */
-    LA_SYMB_STRUCTCALL = 0x04,	/* Return value is a structure.  */
-    LA_SYMB_DLSYM = 0x08,	/* Binding due to dlsym call.  */
-    LA_SYMB_ALTVALUE = 0x10	/* Value has been changed by a previous
-				   la_symbind call.  */
-  };
 
 #if __ELF_NATIVE_CLASS == 32
 # define symbind symbind32
@@ -364,22 +290,8 @@ enum
 # error "__ELF_NATIVE_CLASS must be defined"
 #endif
 
-struct dl_phdr_info
-  {
-    ElfW(Addr) dlpi_addr;
-    const char *dlpi_name;
-    const ElfW(Phdr) *dlpi_phdr;
-    ElfW(Half) dlpi_phnum;
-
-    unsigned long long int dlpi_adds;
-    unsigned long long int dlpi_subs;
-  };
-
-extern int dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
-					     size_t size, void *data),
-			    void *data);
 extern int __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
 					       size_t size, void *data),
 			      void *data);
 
-#endif /* link.h */
+#endif /* include/link.h */

sysdeps/generic/ldsodefs.h

@@ -1113,6 +1113,11 @@ extern void _dl_add_to_slotinfo (struct link_map  *l) attribute_hidden;
    module with the given index.  */
 extern struct link_map *_dl_update_slotinfo (unsigned long int req_modid);
 
+/* Look up the module's TLS block as for __tls_get_addr,
+   but never touch anything.  Return null if it's not allocated yet.  */
+extern void *_dl_tls_get_addr_soft (struct link_map *l) internal_function;
+
+
 __END_DECLS
 
 #endif /* ldsodefs.h */