/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_UNWIND_USER_TYPES_H
#define _LINUX_UNWIND_USER_TYPES_H

#include <linux/types.h>

/*
 * Unwind types, listed in priority order: lower numbers are attempted first if
 * available.
 */
enum unwind_user_type_bits {
        UNWIND_USER_TYPE_FP_BIT =               0,

        NR_UNWIND_USER_TYPE_BITS,
};

enum unwind_user_type {
        /* Type "none" for the start of stack walk iteration. */
        UNWIND_USER_TYPE_NONE =                 0,
        UNWIND_USER_TYPE_FP =                   BIT(UNWIND_USER_TYPE_FP_BIT),
};

struct unwind_stacktrace {
        unsigned int    nr;
        unsigned long   *entries;
};

struct unwind_user_frame {
        s32 cfa_off;
        s32 ra_off;
        s32 fp_off;
        bool use_fp;
};

struct unwind_user_state {
        unsigned long                           ip;
        unsigned long                           sp;
        unsigned long                           fp;
        unsigned int                            ws;
        enum unwind_user_type                   current_type;
        unsigned int                            available_types;
        bool                                    topmost;
        bool                                    done;
};

#endif /* _LINUX_UNWIND_USER_TYPES_H */