1/* 2 * arch/arm/include/asm/kprobes.h 3 * 4 * Copyright (C) 2006, 2007 Motorola Inc. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License for more details. 14 */ 15 16#ifndef _ARM_KPROBES_H 17#define _ARM_KPROBES_H 18 19#include <linux/types.h> 20#include <linux/ptrace.h> 21#include <linux/percpu.h> 22 23#define __ARCH_WANT_KPROBES_INSN_SLOT 24#define MAX_INSN_SIZE 2 25#define MAX_STACK_SIZE 64 /* 32 would probably be OK */ 26 27/* 28 * This undefined instruction must be unique and 29 * reserved solely for kprobes' use. 30 */ 31#define KPROBE_BREAKPOINT_INSTRUCTION 0xe7f001f8 32 33#define regs_return_value(regs) ((regs)->ARM_r0) 34#define flush_insn_slot(p) do { } while (0) 35#define kretprobe_blacklist_size 0 36 37typedef u32 kprobe_opcode_t; 38 39struct kprobe; 40typedef void (kprobe_insn_handler_t)(struct kprobe *, struct pt_regs *); 41 42/* Architecture specific copy of original instruction. */ 43struct arch_specific_insn { 44 kprobe_opcode_t *insn; 45 kprobe_insn_handler_t *insn_handler; 46}; 47 48struct prev_kprobe { 49 struct kprobe *kp; 50 unsigned int status; 51}; 52 53/* per-cpu kprobe control block */ 54struct kprobe_ctlblk { 55 unsigned int kprobe_status; 56 struct prev_kprobe prev_kprobe; 57 struct pt_regs jprobe_saved_regs; 58 char jprobes_stack[MAX_STACK_SIZE]; 59}; 60 61void arch_remove_kprobe(struct kprobe *); 62void kretprobe_trampoline(void); 63 64int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr); 65int kprobe_exceptions_notify(struct notifier_block *self, 66 unsigned long val, void *data); 67 68enum kprobe_insn { 69 INSN_REJECTED, 70 INSN_GOOD, 71 INSN_GOOD_NO_SLOT 72}; 73 74enum kprobe_insn arm_kprobe_decode_insn(kprobe_opcode_t, 75 struct arch_specific_insn *); 76void __init arm_kprobe_decode_init(void); 77 78#endif /* _ARM_KPROBES_H */ 79