20 static bool outside_of_stack(struct unwind_state *state, unsigned long sp)  in outside_of_stack()  argument
22 	return (sp <= state->sp) ||  in outside_of_stack()
23 		(sp > state->stack_info.end - sizeof(struct stack_frame));  in outside_of_stack()
26 static bool update_stack_info(struct unwind_state *state, unsigned long sp)  in update_stack_info()  argument
32 	if (get_stack_info(sp, state->task, info, mask) != 0 ||  in update_stack_info()
33 	    !on_stack(info, sp, sizeof(struct stack_frame)))  in update_stack_info()
44 	unsigned long sp, ip;  in unwind_next_frame()  local
50 			sp = state->sp;  in unwind_next_frame()
53 			sp = READ_ONCE_NOCHECK(regs->gprs[15]);  in unwind_next_frame()
54 			if (unlikely(outside_of_stack(state, sp))) {  in unwind_next_frame()
55 				if (!update_stack_info(state, sp))  in unwind_next_frame()
59 		sf = (struct stack_frame *) sp;  in unwind_next_frame()
69 		sf = (struct stack_frame *) state->sp;  in unwind_next_frame()
70 		sp = READ_ONCE_NOCHECK(sf->back_chain);  in unwind_next_frame()
71 		if (likely(sp)) {  in unwind_next_frame()
73 			if (unlikely(outside_of_stack(state, sp))) {  in unwind_next_frame()
74 				if (!update_stack_info(state, sp))  in unwind_next_frame()
77 			sf = (struct stack_frame *) sp;  in unwind_next_frame()
82 			sp = state->sp + STACK_FRAME_OVERHEAD;  in unwind_next_frame()
83 			if (!on_stack(info, sp, sizeof(struct pt_regs)))  in unwind_next_frame()
85 			regs = (struct pt_regs *) sp;  in unwind_next_frame()
97 					   ip, (void *) sp);  in unwind_next_frame()
101 	state->sp = sp;  in unwind_next_frame()
116 		    struct pt_regs *regs, unsigned long sp)  in __unwind_start()  argument
135 	if (get_stack_info(sp, task, info, mask) != 0 ||  in __unwind_start()
136 	    !on_stack(info, sp, sizeof(struct stack_frame))) {  in __unwind_start()
149 		sf = (struct stack_frame *) sp;  in __unwind_start()
163 	state->sp = sp;  in __unwind_start()