// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2022-2023 Loongson Technology Corporation Limited
 */
#include <linux/kernel.h>
#include <linux/ftrace.h>

#include <asm/unwind.h>

bool default_next_frame(struct unwind_state *state)
{
        struct stack_info *info = &state->stack_info;
        unsigned long addr;

        if (unwind_done(state))
                return false;

        do {
                for (state->sp += sizeof(unsigned long);
                     state->sp < info->end; state->sp += sizeof(unsigned long)) {
                        addr = *(unsigned long *)(state->sp);
                        state->pc = unwind_graph_addr(state, addr, state->sp + 8);
                        if (__kernel_text_address(state->pc))
                                return true;
                }

                state->sp = info->next_sp;

        } while (!get_stack_info(state->sp, state->task, info));

        return false;
}