xref: /kernel/linux/linux-5.10/arch/arm/include/asm/unwind.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * arch/arm/include/asm/unwind.h
 *
 * Copyright (C) 2008 ARM Limited
 */

#ifndef __ASM_UNWIND_H
#define __ASM_UNWIND_H

#ifndef __ASSEMBLY__

/* Unwind reason code according the the ARM EABI documents */
enum unwind_reason_code {
	URC_OK = 0,			/* operation completed successfully */
	URC_CONTINUE_UNWIND = 8,
	URC_FAILURE = 9			/* unspecified failure of some kind */
};

struct unwind_idx {
	unsigned long addr_offset;
	unsigned long insn;
};

struct unwind_table {
	struct list_head list;
	const struct unwind_idx *start;
	const struct unwind_idx *origin;
	const struct unwind_idx *stop;
	unsigned long begin_addr;
	unsigned long end_addr;
};

extern struct unwind_table *unwind_table_add(unsigned long start,
					     unsigned long size,
					     unsigned long text_addr,
					     unsigned long text_size);
extern void unwind_table_del(struct unwind_table *tab);
extern void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk,
			     const char *loglvl);

#endif	/* !__ASSEMBLY__ */

#ifdef CONFIG_ARM_UNWIND
#define UNWIND(code...)		code
#else
#define UNWIND(code...)
#endif

#endif	/* __ASM_UNWIND_H */