Commit 421b5411 authored Nov 06, 2009 by Paul Mundt

sh: unwinder: Fix up invalid PC refetch in dwarf unwinder.

The dwarf unwinder presently attempts to provide a sane PC value if none
is provided, however the logic is broken and cases where a previous valid
dwarf frame exists along with a bogus PC value can still proceed. This
fixes up the test and prevents the unwinder from blowing up.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

parent 345e5a76

arch/sh/kernel/dwarf.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -555,7 +555,7 @@ struct dwarf_frame * dwarf_unwind_stack(unsigned long pc,
		* NOTE: the return address is guaranteed to be setup by the
		* time this function makes its first function call.
		*/
		if (!pc && !prev)
		if (!pc \|\| !prev)
		pc = (unsigned long)current_text_addr();

		#ifdef CONFIG_FUNCTION_GRAPH_TRACER