| #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> |
| |
| struct pt_regs; |
| |
| 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); |
| |
| /* 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; |
| }; |
| |
| #ifdef CONFIG_KPROBES |
| extern int kprobe_exceptions_notify(struct notifier_block *self, |
| unsigned long val, void *data); |
| #else /* !CONFIG_KPROBES */ |
| static inline int kprobe_exceptions_notify(struct notifier_block *self, |
| unsigned long val, void *data) |
| { |
| return 0; |
| } |
| #endif |
| #endif /* __KERNEL__ */ |
| #endif /* _ASM_POWERPC_KPROBES_H */ |