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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2018-12-07 13:06:04 -0500
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2018-12-22 08:21:02 -0500
commitcec8d0e7f06e08b981e9d61bef267c8c36d536f5 (patch)
tree3d1a3e31f78f06c9b3143dff18b4d53e1878b82b /arch/sh/kernel/dwarf.c
parentsparc64: Use ftrace_graph_get_ret_stack() instead of curr_ret_stack (diff)
downloadlinux-dev-cec8d0e7f06e08b981e9d61bef267c8c36d536f5.tar.xz
linux-dev-cec8d0e7f06e08b981e9d61bef267c8c36d536f5.zip
sh: ftrace: Use ftrace_graph_get_ret_stack() instead of curr_ret_stack
The structure of the ret_stack array on the task struct is going to change, and accessing it directly via the curr_ret_stack index will no longer give the ret_stack entry that holds the return address. To access that, architectures must now use ftrace_graph_get_ret_stack() to get the associated ret_stack that matches the saved return address. Cc: linux-sh@vger.kernel.org Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to '')
-rw-r--r--arch/sh/kernel/dwarf.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c
index bb511e2d9d68..df0fd6efe758 100644
--- a/arch/sh/kernel/dwarf.c
+++ b/arch/sh/kernel/dwarf.c
@@ -608,17 +608,18 @@ struct dwarf_frame *dwarf_unwind_stack(unsigned long pc,
* expected to find the real return address.
*/
if (pc == (unsigned long)&return_to_handler) {
- int index = current->curr_ret_stack;
+ struct ftrace_ret_stack *ret_stack;
+ ret_stack = ftrace_graph_get_ret_stack(current, 0);
+ if (ret_stack)
+ pc = ret_stack->ret;
/*
* We currently have no way of tracking how many
* return_to_handler()'s we've seen. If there is more
* than one patched return address on our stack,
* complain loudly.
*/
- WARN_ON(index > 0);
-
- pc = current->ret_stack[index].ret;
+ WARN_ON(ftrace_graph_get_ret_stack(current, 1);
}
#endif