[linux-2.6-block.git] / arch / loongarch / include / asm / unwind.h

/* 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, is_ftrace;
	int graph_idx;
	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 */
Commit	Line	Data
49232773 QZ	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	/*
	3	* Most of this ideas comes from x86.
	4	*
	5	* Copyright (C) 2022 Loongson Technology Corporation Limited
	6	*/
	7	#ifndef _ASM_UNWIND_H
	8	#define _ASM_UNWIND_H
	9
	10	#include <linux/sched.h>
	11
	12	#include <asm/stacktrace.h>
	13
49aef111 QZ	14	enum unwinder_type {
	15	UNWINDER_GUESS,
	16	UNWINDER_PROLOGUE,
	17	};
	18
49232773	19	struct unwind_state {
49aef111	20	char type; /* UNWINDER_XXX */
49232773 QZ	21	struct stack_info stack_info;
49232773 QZ	22	struct task_struct *task;
4733f09d	23	bool first, error, is_ftrace;
a51ac524	24	int graph_idx;
49aef111	25	unsigned long sp, pc, ra;
49232773 QZ	26	};
	27
	28	void unwind_start(struct unwind_state *state,
	29	struct task_struct task, struct pt_regs regs);
	30	bool unwind_next_frame(struct unwind_state *state);
	31	unsigned long unwind_get_return_address(struct unwind_state *state);
	32
	33	static inline bool unwind_done(struct unwind_state *state)
	34	{
	35	return state->stack_info.type == STACK_TYPE_UNKNOWN;
	36	}
	37
	38	static inline bool unwind_error(struct unwind_state *state)
	39	{
	40	return state->error;
	41	}
	42
	43	#endif /* _ASM_UNWIND_H */