12 unsigned long unwind_get_return_address(struct unwind_state *state)  in unwind_get_return_address()  argument
14 	if (unwind_done(state))  in unwind_get_return_address()
16 	return __kernel_text_address(state->ip) ? state->ip : 0;  in unwind_get_return_address()
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
28 	struct stack_info *info = &state->stack_info;  in update_stack_info()
29 	unsigned long *mask = &state->stack_mask;  in update_stack_info()
32 	if (get_stack_info(sp, state->task, info, mask) != 0 ||  in update_stack_info()
39 bool unwind_next_frame(struct unwind_state *state)  in unwind_next_frame()  argument
41 	struct stack_info *info = &state->stack_info;  in unwind_next_frame()
47 	regs = state->regs;  in unwind_next_frame()
49 		if (state->reuse_sp) {  in unwind_next_frame()
50 			sp = state->sp;  in unwind_next_frame()
51 			state->reuse_sp = false;  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()
65 			state->regs = NULL;  in unwind_next_frame()
66 			return unwind_next_frame(state);  in unwind_next_frame()
69 		sf = (struct stack_frame *) state->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()
82 			sp = state->sp + STACK_FRAME_OVERHEAD;  in unwind_next_frame()
96 		ip = ftrace_graph_ret_addr(state->task, &state->graph_idx,  in unwind_next_frame()
101 	state->sp = sp;  in unwind_next_frame()
102 	state->ip = ip;  in unwind_next_frame()
103 	state->regs = regs;  in unwind_next_frame()
104 	state->reliable = reliable;  in unwind_next_frame()
108 	state->error = true;  in unwind_next_frame()
110 	state->stack_info.type = STACK_TYPE_UNKNOWN;  in unwind_next_frame()
115 void __unwind_start(struct unwind_state *state, struct task_struct *task,  in __unwind_start()  argument
118 	struct stack_info *info = &state->stack_info;  in __unwind_start()
119 	unsigned long *mask = &state->stack_mask;  in __unwind_start()
124 	memset(state, 0, sizeof(*state));  in __unwind_start()
125 	state->task = task;  in __unwind_start()
126 	state->regs = regs;  in __unwind_start()
139 		state->error = true;  in __unwind_start()
158 		ip = ftrace_graph_ret_addr(state->task, &state->graph_idx,  in __unwind_start()
163 	state->sp = sp;  in __unwind_start()
164 	state->ip = ip;  in __unwind_start()
165 	state->reliable = reliable;  in __unwind_start()
166 	state->reuse_sp = reuse_sp;  in __unwind_start()