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-rw-r--r--arch/x86/kernel/dumpstack.c34
1 files changed, 33 insertions, 1 deletions
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 5962176..6b1f6f6 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -30,6 +30,37 @@ void printk_address(unsigned long address, int reliable)
reliable ? "" : "? ", (void *) address);
}
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+static void
+print_ftrace_graph_addr(unsigned long addr, void *data,
+ const struct stacktrace_ops *ops,
+ struct thread_info *tinfo, int *graph)
+{
+ struct task_struct *task = tinfo->task;
+ unsigned long ret_addr;
+ int index = task->curr_ret_stack;
+
+ if (addr != (unsigned long)return_to_handler)
+ return;
+
+ if (!task->ret_stack || index < *graph)
+ return;
+
+ index -= *graph;
+ ret_addr = task->ret_stack[index].ret;
+
+ ops->address(data, ret_addr, 1);
+
+ (*graph)++;
+}
+#else
+static inline void
+print_ftrace_graph_addr(unsigned long addr, void *data,
+ const struct stacktrace_ops *ops,
+ struct thread_info *tinfo, int *graph)
+{ }
+#endif
+
/*
* x86-64 can have up to three kernel stacks:
* process stack
@@ -54,7 +85,7 @@ unsigned long
print_context_stack(struct thread_info *tinfo,
unsigned long *stack, unsigned long bp,
const struct stacktrace_ops *ops, void *data,
- unsigned long *end)
+ unsigned long *end, int *graph)
{
struct stack_frame *frame = (struct stack_frame *)bp;
@@ -70,6 +101,7 @@ print_context_stack(struct thread_info *tinfo,
} else {
ops->address(data, addr, bp == 0);
}
+ print_ftrace_graph_addr(addr, data, ops, tinfo, graph);
}
stack++;
}
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