13  * Unwind the current stack frame and store the new register values in the
41 int notrace unwind_frame(struct stackframe *frame)  in unwind_frame()  argument
44 	unsigned long fp = frame->fp;  in unwind_frame()
47 	low = frame->sp;  in unwind_frame()
51 	/* check current frame pointer is within bounds */  in unwind_frame()
55 	frame->sp = frame->fp;  in unwind_frame()
56 	frame->fp = *(unsigned long *)(fp);  in unwind_frame()
57 	frame->pc = frame->lr;  in unwind_frame()
58 	frame->lr = *(unsigned long *)(fp + 4);  in unwind_frame()
60 	/* check current frame pointer is within bounds */  in unwind_frame()
64 	/* restore the registers from the stack frame */  in unwind_frame()
65 	frame->fp = *(unsigned long *)(fp - 12);  in unwind_frame()
66 	frame->sp = *(unsigned long *)(fp - 8);  in unwind_frame()
67 	frame->pc = *(unsigned long *)(fp - 4);  in unwind_frame()
74 void notrace walk_stackframe(struct stackframe *frame,  in walk_stackframe()  argument
80 		if (fn(frame, data))  in walk_stackframe()
82 		ret = unwind_frame(frame);  in walk_stackframe()
96 static int save_trace(struct stackframe *frame, void *d)  in save_trace()  argument
101 	unsigned long addr = frame->pc;  in save_trace()
115 	if (!in_entry_text(frame->pc))  in save_trace()
118 	regs = (struct pt_regs *)frame->sp;  in save_trace()
119 	if ((unsigned long)&regs[1] > ALIGN(frame->sp, THREAD_SIZE))  in save_trace()
132 	struct stackframe frame;  in __save_stack_trace()  local
147 		frame.fp = thread_saved_fp(tsk);  in __save_stack_trace()
148 		frame.sp = thread_saved_sp(tsk);  in __save_stack_trace()
149 		frame.lr = 0;		/* recovered from the stack */  in __save_stack_trace()
150 		frame.pc = thread_saved_pc(tsk);  in __save_stack_trace()
155 		frame.fp = (unsigned long)__builtin_frame_address(0);  in __save_stack_trace()
156 		frame.sp = current_stack_pointer;  in __save_stack_trace()
157 		frame.lr = (unsigned long)__builtin_return_address(0);  in __save_stack_trace()
158 		frame.pc = (unsigned long)__save_stack_trace;  in __save_stack_trace()
161 	walk_stackframe(&frame, save_trace, &data);  in __save_stack_trace()
167 	struct stackframe frame;  in save_stack_trace_regs()  local
173 	frame.fp = regs->ARM_fp;  in save_stack_trace_regs()
174 	frame.sp = regs->ARM_sp;  in save_stack_trace_regs()
175 	frame.lr = regs->ARM_lr;  in save_stack_trace_regs()
176 	frame.pc = regs->ARM_pc;  in save_stack_trace_regs()
178 	walk_stackframe(&frame, save_trace, &data);  in save_stack_trace_regs()