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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Most of this ideas comes from x86.
*
* Copyright (C) 2022 Loongson Technology Corporation Limited
*/
#ifndef _ASM_UNWIND_H
#define _ASM_UNWIND_H
#include <linux/sched.h>
#include <asm/stacktrace.h>
enum unwinder_type {
UNWINDER_GUESS,
UNWINDER_PROLOGUE,
};
struct unwind_state {
char type; /* UNWINDER_XXX */
struct stack_info stack_info;
struct task_struct *task;
bool first, error;
unsigned long sp, pc, ra;
};
void unwind_start(struct unwind_state *state,
struct task_struct *task, struct pt_regs *regs);
bool unwind_next_frame(struct unwind_state *state);
unsigned long unwind_get_return_address(struct unwind_state *state);
static inline bool unwind_done(struct unwind_state *state)
{
return state->stack_info.type == STACK_TYPE_UNKNOWN;
}
static inline bool unwind_error(struct unwind_state *state)
{
return state->error;
}
#endif /* _ASM_UNWIND_H */
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