* dlfcn/tst-dlinfo.c: New file.

	* dlfcn/Makefile (tests): Add tst-dlinfo.
	($(objpfx)tst-dlinfo): New target.

	* dlfcn/dlinfo.c: New file.
	* dlfcn/Makefile (libdl-routines): Add it.
	* dlfcn/Versions (libdl: GLIBC_2.3.3): Add dlinfo.
	* dlfcn/dlfcn.h [__USE_GNU]: Declare dlinfo.
	[__USE_GNU] (RTLD_DI_*): New enum constants.
	[__USE_GNU] (Dl_serpath, Dl_serinfo): New types.
	* elf/dl-load.c (cache_rpath): New inline function.
	(_dl_map_object): Use it.
	(_dl_rtld_di_serinfo): New function.
	* sysdeps/generic/ldsodefs.h: Declare it.
	* elf/Versions (ld: GLIBC_PRIVATE): Add it.

1 files changed, 87 insertions, 0 deletions

diff --git a/dlfcn/dlinfo.c b/dlfcn/dlinfo.c
new file mode 100644
index 0000000000..37177f1f1b
--- /dev/null
+++ b/dlfcn/dlinfo.c
@@ -0,0 +1,87 @@
+/* dlinfo -- Get information from the dynamic linker.
+   Copyright (C) 2003 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
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <dlfcn.h>
+#include <link.h>
+#include <ldsodefs.h>
+#include <libintl.h>
+
+struct dlinfo_args
+{
+  ElfW(Addr) caller;
+  void *handle;
+  int request;
+  void *arg;
+};
+
+static void
+dlinfo_doit (void *argsblock)
+{
+  struct dlinfo_args *const args = argsblock;
+  struct link_map *l = args->handle;
+
+#if 0
+  if (args->handle == RTLD_SELF)
+    {
+
+      /* Find the highest-addressed object that CALLER is not below.  */
+      for (l = GL(dl_loaded); l != NULL; l = l->l_next)
+	if (caller >= l->l_map_start && caller < l->l_map_end)
+	  /* There must be exactly one DSO for the range of the virtual
+	     memory.  Otherwise something is really broken.  */
+	  break;
+
+      if (l == NULL)
+	_dl_signal_error (0, NULL, NULL, N_("\
+RTLD_SELF used in code not dynamically loaded"));
+    }
+#endif
+
+  switch (args->request)
+    {
+    case RTLD_DI_LMID:
+    case RTLD_DI_CONFIGADDR:
+    default:
+      _dl_signal_error (0, NULL, NULL, N_("unsupported dlinfo request"));
+      break;
+
+    case RTLD_DI_LINKMAP:
+      *(struct link_map **) args->arg = l;
+      break;
+
+    case RTLD_DI_SERINFO:
+      _dl_rtld_di_serinfo (l, args->arg, false);
+      break;
+    case RTLD_DI_SERINFOSIZE:
+      _dl_rtld_di_serinfo (l, args->arg, true);
+      break;
+
+    case RTLD_DI_ORIGIN:
+      strcpy (args->arg, l->l_origin);
+      break;
+    }
+}
+
+int
+dlinfo (void *handle, int request, void *arg)
+{
+  struct dlinfo_args args = { (ElfW(Addr)) RETURN_ADDRESS (0),
+			      handle, request, arg };
+  return _dlerror_run (&dlinfo_doit, &args) ? -1 : 0;
+}