Release 4.11 arch/arm/include/asm/kprobes.h

/*
 * arch/arm/include/asm/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 <asm-generic/kprobes.h>

#ifdef CONFIG_KPROBES
#include <linux/types.h>
#include <linux/ptrace.h>
#include <linux/notifier.h>


#define __ARCH_WANT_KPROBES_INSN_SLOT

#define MAX_INSN_SIZE			2


#define flush_insn_slot(p)		do { } while (0)

#define kretprobe_blacklist_size	0


typedef u32 kprobe_opcode_t;
struct kprobe;
#include <asm/probes.h>


#define	arch_specific_insn	arch_probes_insn


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_fault_handler(struct pt_regs *regs, unsigned int fsr);
int kprobe_exceptions_notify(struct notifier_block *self,
			     unsigned long val, void *data);

/* optinsn template addresses */
extern __visible kprobe_opcode_t optprobe_template_entry;
extern __visible kprobe_opcode_t optprobe_template_val;
extern __visible kprobe_opcode_t optprobe_template_call;
extern __visible kprobe_opcode_t optprobe_template_end;
extern __visible kprobe_opcode_t optprobe_template_sub_sp;
extern __visible kprobe_opcode_t optprobe_template_add_sp;
extern __visible kprobe_opcode_t optprobe_template_restore_begin;
extern __visible kprobe_opcode_t optprobe_template_restore_orig_insn;
extern __visible kprobe_opcode_t optprobe_template_restore_end;


#define MAX_OPTIMIZED_LENGTH	4

#define MAX_OPTINSN_SIZE				\
	((unsigned long)&optprobe_template_end -        \
         (unsigned long)&optprobe_template_entry)

#define RELATIVEJUMP_SIZE	4


struct arch_optimized_insn {
	/*
         * copy of the original instructions.
         * Different from x86, ARM kprobe_opcode_t is u32.
         */

#define MAX_COPIED_INSN	DIV_ROUND_UP(RELATIVEJUMP_SIZE, sizeof(kprobe_opcode_t))
	
kprobe_opcode_t copied_insn[MAX_COPIED_INSN];
	/* detour code buffer */
	
kprobe_opcode_t *insn;
	/*
         * We always copy one instruction on ARM,
         * so size will always be 4, and unlike x86, there is no
         * need for a size field.
         */
};

#endif /* CONFIG_KPROBES */
#endif /* _ARM_KPROBES_H */
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Directory: arch/arm/include/asm

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