1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (C) 2022-2023 Loongson Technology Corporation Limited
 4 */
 5#include <linux/kernel.h>
 6#include <linux/ftrace.h>
 7
 8#include <asm/unwind.h>
 9
10bool default_next_frame(struct unwind_state *state)
11{
12	struct stack_info *info = &state->stack_info;
13	unsigned long addr;
14
15	if (unwind_done(state))
16		return false;
17
18	do {
19		for (state->sp += sizeof(unsigned long);
20		     state->sp < info->end; state->sp += sizeof(unsigned long)) {
21			addr = *(unsigned long *)(state->sp);
22			state->pc = unwind_graph_addr(state, addr, state->sp + 8);
23			if (__kernel_text_address(state->pc))
24				return true;
25		}
26
27		state->sp = info->next_sp;
28
29	} while (!get_stack_info(state->sp, state->task, info));
30
31	return false;
32}