gdb/

	PR 14548
	* infrun.c (handle_inferior_event): Do not reverse-continue back to the
	function start if we are already at function start.  Both for
	reverse-next and for reverse-step into function without line number
	info.

gdb/testsuite/
	PR 14548
	* gdb.reverse/singlejmp-reverse-nodebug.S: New file.
	* gdb.reverse/singlejmp-reverse-nodebug.c: New file.
	* gdb.reverse/singlejmp-reverse.S: New file.
	* gdb.reverse/singlejmp-reverse.c: New file.
	* gdb.reverse/singlejmp-reverse.exp: New file.

1 files changed, 42 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.reverse/singlejmp-reverse.c b/gdb/testsuite/gdb.reverse/singlejmp-reverse.c
new file mode 100644
index 00000000000..c9ebf37451e
--- /dev/null
+++ b/gdb/testsuite/gdb.reverse/singlejmp-reverse.c
@@ -0,0 +1,42 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2012 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/>.  */
+
+volatile int v;
+
+static __attribute__ ((noinline, noclone)) void
+g (void)
+{
+  v = 2;
+}
+
+static __attribute__ ((noinline, noclone)) void
+f (void)
+{
+  g ();
+}
+
+extern void nodebug (void);
+
+int
+main (void)
+{
+  v = 1;
+  f ();
+  nodebug ();
+  v = 3;
+  return 0;
+}