/* 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;
        struct list_head mod_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);

void __aeabi_unwind_cpp_pr0(void);
void __aeabi_unwind_cpp_pr1(void);
void __aeabi_unwind_cpp_pr2(void);

#endif  /* !__ASSEMBLY__ */

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

#endif  /* __ASM_UNWIND_H */