/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * arch/arm/include/asm/probes.h
 *
 * Original contents copied from arch/arm/include/asm/kprobes.h
 * which contains the following notice...
 *
 * Copyright (C) 2006, 2007 Motorola Inc.
 */

#ifndef _ASM_PROBES_H
#define _ASM_PROBES_H

#ifndef __ASSEMBLY__

typedef u32 probes_opcode_t;

struct arch_probes_insn;
typedef void (probes_insn_handler_t)(probes_opcode_t,
                                     struct arch_probes_insn *,
                                     struct pt_regs *);
typedef unsigned long (probes_check_cc)(unsigned long);
typedef void (probes_insn_singlestep_t)(probes_opcode_t,
                                        struct arch_probes_insn *,
                                        struct pt_regs *);
typedef void (probes_insn_fn_t)(void);

/* Architecture specific copy of original instruction. */
struct arch_probes_insn {
        probes_opcode_t                 *insn;
        probes_insn_handler_t           *insn_handler;
        probes_check_cc                 *insn_check_cc;
        probes_insn_singlestep_t        *insn_singlestep;
        probes_insn_fn_t                *insn_fn;
        int                             stack_space;
        unsigned long                   register_usage_flags;
        bool                            kprobe_direct_exec;
};

#endif /* __ASSEMBLY__ */

/*
 * We assume one instruction can consume at most 64 bytes stack, which is
 * 'push {r0-r15}'. Instructions consume more or unknown stack space like
 * 'str r0, [sp, #-80]' and 'str r0, [sp, r1]' should be prohibit to probe.
 */
#define MAX_STACK_SIZE                  64

#endif