18  * Unwind the current stack frame and store the new register values in the
33 int notrace unwind_frame(struct stackframe *frame)  in unwind_frame()  argument
36 	unsigned long fp = frame->fp;  in unwind_frame()
39 	low = frame->sp;  in unwind_frame()
42 	/* check current frame pointer is within bounds */  in unwind_frame()
46 	/* restore the registers from the stack frame */  in unwind_frame()
47 	frame->fp = *(unsigned long *)(fp - 12);  in unwind_frame()
48 	frame->sp = *(unsigned long *)(fp - 8);  in unwind_frame()
49 	frame->pc = *(unsigned long *)(fp - 4);  in unwind_frame()
55 void notrace walk_stackframe(struct stackframe *frame,  in walk_stackframe()  argument
61 		if (fn(frame, data))  in walk_stackframe()
63 		ret = unwind_frame(frame);  in walk_stackframe()
77 static int save_trace(struct stackframe *frame, void *d)  in save_trace()  argument
81 	unsigned long addr = frame->pc;  in save_trace()
98 	struct stackframe frame;  in save_stack_trace_tsk()  local
105 		frame.fp = thread_saved_fp(tsk);  in save_stack_trace_tsk()
106 		frame.sp = thread_saved_sp(tsk);  in save_stack_trace_tsk()
107 		frame.lr = 0;		/* recovered from the stack */  in save_stack_trace_tsk()
108 		frame.pc = thread_saved_pc(tsk);  in save_stack_trace_tsk()
113 		frame.fp = (unsigned long)__builtin_frame_address(0);  in save_stack_trace_tsk()
114 		frame.sp = current_sp;  in save_stack_trace_tsk()
115 		frame.lr = (unsigned long)__builtin_return_address(0);  in save_stack_trace_tsk()
116 		frame.pc = (unsigned long)save_stack_trace_tsk;  in save_stack_trace_tsk()
119 	walk_stackframe(&frame, save_trace, &data);  in save_stack_trace_tsk()