#ifndef _ASM_KPROBES_H

#define _ASM_KPROBES_H

/*

 *  Kernel Probes (KProbes)

 *  include/asm-x86_64/kprobes.h

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * 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.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 *

 * Copyright (C) IBM Corporation, 2002, 2004

 *

 * 2004-Oct	Prasanna S Panchamukhi <prasanna@in.ibm.com> and Jim Keniston

 *		kenistoj@us.ibm.com adopted from i386.

 */

#include <linux/types.h>

#include <linux/ptrace.h>

#include <linux/percpu.h>

#define  __ARCH_WANT_KPROBES_INSN_SLOT

struct pt_regs;

struct kprobe;

typedef u8 kprobe_opcode_t;

#define BREAKPOINT_INSTRUCTION	0xcc

#define MAX_INSN_SIZE 15

#define MAX_STACK_SIZE 64

#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \

	(((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \

	? (MAX_STACK_SIZE) \

	: (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR)))

#define JPROBE_ENTRY(pentry)	(kprobe_opcode_t *)pentry

#define ARCH_SUPPORTS_KRETPROBES

#define  ARCH_INACTIVE_KPROBE_COUNT 1

void kretprobe_trampoline(void);

extern void arch_remove_kprobe(struct kprobe *p);

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

/* Architecture specific copy of original instruction*/

struct arch_specific_insn {

	/* copy of the original instruction */

	kprobe_opcode_t *insn;

};

struct prev_kprobe {

	struct kprobe *kp;

	unsigned long status;

	unsigned long old_rflags;

	unsigned long saved_rflags;

};

/* per-cpu kprobe control block */

struct kprobe_ctlblk {

	unsigned long kprobe_status;

	unsigned long kprobe_old_rflags;

	unsigned long kprobe_saved_rflags;

	long *jprobe_saved_rsp;

	struct pt_regs jprobe_saved_regs;

	kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];

	struct prev_kprobe prev_kprobe;

};

/* trap3/1 are intr gates for kprobes.  So, restore the status of IF,

 * if necessary, before executing the original int3/1 (trap) handler.

 */

static inline void restore_interrupts(struct pt_regs *regs)

{

	if (regs->eflags & IF_MASK)

		local_irq_enable();

}

extern int post_kprobe_handler(struct pt_regs *regs);

extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);

extern int kprobe_handler(struct pt_regs *regs);

extern int kprobe_exceptions_notify(struct notifier_block *self,

				    unsigned long val, void *data);

#endif				/* _ASM_KPROBES_H */