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authorPaul Mundt <lethal@linux-sh.org>2009-11-06 17:23:33 +0900
committerPaul Mundt <lethal@linux-sh.org>2009-11-06 17:23:33 +0900
commit421b541110b20ccff1a7ff3245439cb24efe9812 (patch)
tree1a03b8e813e6e0036b83575c1e92993c838d7155 /arch/sh/kernel/dwarf.c
parent345e5a7672f561b539b3249cbe437b8d6595ab1b (diff)
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>
Diffstat (limited to 'arch/sh/kernel/dwarf.c')
-rw-r--r--arch/sh/kernel/dwarf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c
index 2d07084e4882..d76a23170dbb 100644
--- a/arch/sh/kernel/dwarf.c
+++ b/arch/sh/kernel/dwarf.c
@@ -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