gdb/

Support Valgrind attachments broken by the PIE support.
	* auxv.c: Include gdbcore.h.
	(procfs_xfer_auxv): Make static.  Reduce its comment.  Drop its
	parameters ops, object and annex.  Remove their assertions.
	(ld_so_xfer_auxv, memory_xfer_auxv): New function.
	* auxv.h (procfs_xfer_auxv): Remove comment.  Rename to ...
	(memory_xfer_auxv): ... here.
	* linux-nat.c (linux_xfer_partial): Rename procfs_xfer_auxv to
	memory_xfer_auxv.
	* procfs.c (procfs_xfer_partial): Likewise.
	* solib-svr4.c (svr4_relocate_main_executable): New prototype.
	(svr4_special_symbol_handling): Call svr4_relocate_main_executable.
	(svr4_solib_create_inferior_hook): Conditionalize the
	svr4_relocate_main_executable call.

gdb/testsuite/
	* gdb.base/valgrind-db-attach.exp, gdb.base/valgrind-db-attach.c: New.

gdb/testsuite/gdb.base/valgrind-db-attach.c

@@ -0,0 +1,30 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2009 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+
+int main()
+{
+  void *p;
+
+  p = malloc (1);
+  if (p == NULL)
+    return 1;
+  free (p);
+  free (p);	/* double-free */
+  return 0;
+}