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-rw-r--r--arch/x86/kernel/unwind_guess.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/unwind_guess.c b/arch/x86/kernel/unwind_guess.c
index b5a834c93065..9298993dc8b7 100644
--- a/arch/x86/kernel/unwind_guess.c
+++ b/arch/x86/kernel/unwind_guess.c
@@ -5,6 +5,16 @@
#include <asm/stacktrace.h>
#include <asm/unwind.h>
+unsigned long unwind_get_return_address(struct unwind_state *state)
+{
+ if (unwind_done(state))
+ return 0;
+
+ return ftrace_graph_ret_addr(state->task, &state->graph_idx,
+ *state->sp, state->sp);
+}
+EXPORT_SYMBOL_GPL(unwind_get_return_address);
+
bool unwind_next_frame(struct unwind_state *state)
{
struct stack_info *info = &state->stack_info;