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/*
* include/asm-arm/kprobes.h
*
* Copyright (C) 2006, 2007 Motorola Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#ifndef _ARM_KPROBES_H
#define _ARM_KPROBES_H
#include <linux/types.h>
#include <linux/ptrace.h>
#include <linux/percpu.h>
#define ARCH_SUPPORTS_KRETPROBES
#define __ARCH_WANT_KPROBES_INSN_SLOT
#define MAX_INSN_SIZE 2
#define MAX_STACK_SIZE 64 /* 32 would probably be OK */
/*
* This undefined instruction must be unique and
* reserved solely for kprobes' use.
*/
#define KPROBE_BREAKPOINT_INSTRUCTION 0xe7f001f8
#define regs_return_value(regs) ((regs)->ARM_r0)
#define flush_insn_slot(p) do { } while (0)
#define kretprobe_blacklist_size 0
typedef u32 kprobe_opcode_t;
struct kprobe;
typedef void (kprobe_insn_handler_t)(struct kprobe *, struct pt_regs *);
/* Architecture specific copy of original instruction. */
struct arch_specific_insn {
kprobe_opcode_t *insn;
kprobe_insn_handler_t *insn_handler;
};
struct prev_kprobe {
struct kprobe *kp;
unsigned int status;
};
/* per-cpu kprobe control block */
struct kprobe_ctlblk {
unsigned int kprobe_status;
struct prev_kprobe prev_kprobe;
struct pt_regs jprobe_saved_regs;
char jprobes_stack[MAX_STACK_SIZE];
};
void arch_remove_kprobe(struct kprobe *);
int kprobe_trap_handler(struct pt_regs *regs, unsigned int instr);
int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr);
int kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data);
enum kprobe_insn {
INSN_REJECTED,
INSN_GOOD,
INSN_GOOD_NO_SLOT
};
enum kprobe_insn arm_kprobe_decode_insn(kprobe_opcode_t,
struct arch_specific_insn *);
void __init arm_kprobe_decode_init(void);
#endif /* _ARM_KPROBES_H */
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