#ifndef _ASM_POWERPC_KPROBES_H #define _ASM_POWERPC_KPROBES_H #ifdef __KERNEL__ /* * Kernel Probes (KProbes) * * 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 * * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel * Probes initial implementation ( includes suggestions from * Rusty Russell). * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli * <ananth@in.ibm.com> */ #include <linux/types.h> #include <linux/ptrace.h> #include <linux/percpu.h> #define __ARCH_WANT_KPROBES_INSN_SLOT struct pt_regs; struct kprobe; typedef unsigned int kprobe_opcode_t; #define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */ #define MAX_INSN_SIZE 1 #define IS_TW(instr) (((instr) & 0xfc0007fe) == 0x7c000008) #define IS_TD(instr) (((instr) & 0xfc0007fe) == 0x7c000088) #define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000) #define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000) #define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)((func_descr_t *)pentry) #define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \ IS_TWI(instr) || IS_TDI(instr)) #define ARCH_SUPPORTS_KRETPROBES void kretprobe_trampoline(void); extern void arch_remove_kprobe(struct kprobe *p); /* Architecture specific copy of original instruction */ struct arch_specific_insn { /* copy of original instruction */ kprobe_opcode_t *insn; }; struct prev_kprobe { struct kprobe *kp; unsigned long status; unsigned long saved_msr; }; /* per-cpu kprobe control block */ struct kprobe_ctlblk { unsigned long kprobe_status; unsigned long kprobe_saved_msr; struct pt_regs jprobe_saved_regs; struct prev_kprobe prev_kprobe; }; extern int kprobe_exceptions_notify(struct notifier_block *self, unsigned long val, void *data); #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_KPROBES_H */