Commit 421b5411 authored by Paul Mundt's avatar 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: default avatarPaul Mundt <lethal@linux-sh.org>
parent 345e5a76
...@@ -555,7 +555,7 @@ struct dwarf_frame * dwarf_unwind_stack(unsigned long pc, ...@@ -555,7 +555,7 @@ struct dwarf_frame * dwarf_unwind_stack(unsigned long pc,
* NOTE: the return address is guaranteed to be setup by the * NOTE: the return address is guaranteed to be setup by the
* time this function makes its first function call. * time this function makes its first function call.
*/ */
if (!pc && !prev) if (!pc || !prev)
pc = (unsigned long)current_text_addr(); pc = (unsigned long)current_text_addr();
#ifdef CONFIG_FUNCTION_GRAPH_TRACER #ifdef CONFIG_FUNCTION_GRAPH_TRACER
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment