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/*
* Kernel Probes (KProbes)
* include/asm-mips/kprobes.h
*
* Copyright 2006 Sony Corp.
* Copyright 2010 Cavium Networks
*
* 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; version 2 of the License.
*
* 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
*/
#ifndef _ASM_KPROBES_H
#define _ASM_KPROBES_H
#include <linux/ptrace.h>
#include <linux/types.h>
#include <asm/cacheflush.h>
#include <asm/kdebug.h>
#include <asm/inst.h>
#define __ARCH_WANT_KPROBES_INSN_SLOT
struct kprobe;
struct pt_regs;
typedef union mips_instruction kprobe_opcode_t;
#define MAX_INSN_SIZE 2
#define flush_insn_slot(p) \
do { \
flush_icache_range((unsigned long)p->addr, \
(unsigned long)p->addr + \
(MAX_INSN_SIZE * sizeof(kprobe_opcode_t))); \
} while (0)
#define kretprobe_blacklist_size 0
void arch_remove_kprobe(struct kprobe *p);
/* 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_SR;
unsigned long saved_SR;
unsigned long saved_epc;
};
#define MAX_JPROBES_STACK_SIZE 128
#define MAX_JPROBES_STACK_ADDR \
(((unsigned long)current_thread_info()) + THREAD_SIZE - 32 - sizeof(struct pt_regs))
#define MIN_JPROBES_STACK_SIZE(ADDR) \
((((ADDR) + MAX_JPROBES_STACK_SIZE) > MAX_JPROBES_STACK_ADDR) \
? MAX_JPROBES_STACK_ADDR - (ADDR) \
: MAX_JPROBES_STACK_SIZE)
#define SKIP_DELAYSLOT 0x0001
/* per-cpu kprobe control block */
struct kprobe_ctlblk {
unsigned long kprobe_status;
unsigned long kprobe_old_SR;
unsigned long kprobe_saved_SR;
unsigned long kprobe_saved_epc;
unsigned long jprobe_saved_sp;
struct pt_regs jprobe_saved_regs;
/* Per-thread fields, used while emulating branches */
unsigned long flags;
unsigned long target_epc;
u8 jprobes_stack[MAX_JPROBES_STACK_SIZE];
struct prev_kprobe prev_kprobe;
};
extern int kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data);
#endif /* _ASM_KPROBES_H */