| Paul Mackerras | 14cf11a | 2005-09-26 16:04:21 +1000 | [diff] [blame^] | 1 | #ifndef _ASM_KPROBES_H |
| 2 | #define _ASM_KPROBES_H |
| 3 | /* |
| 4 | * Kernel Probes (KProbes) |
| 5 | * include/asm-ppc64/kprobes.h |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 20 | * |
| 21 | * Copyright (C) IBM Corporation, 2002, 2004 |
| 22 | * |
| 23 | * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel |
| 24 | * Probes initial implementation ( includes suggestions from |
| 25 | * Rusty Russell). |
| 26 | * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli |
| 27 | * <ananth@in.ibm.com> |
| 28 | */ |
| 29 | #include <linux/types.h> |
| 30 | #include <linux/ptrace.h> |
| 31 | |
| 32 | struct pt_regs; |
| 33 | |
| 34 | typedef unsigned int kprobe_opcode_t; |
| 35 | #define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */ |
| 36 | #define MAX_INSN_SIZE 1 |
| 37 | |
| 38 | #define IS_TW(instr) (((instr) & 0xfc0007fe) == 0x7c000008) |
| 39 | #define IS_TD(instr) (((instr) & 0xfc0007fe) == 0x7c000088) |
| 40 | #define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000) |
| 41 | #define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000) |
| 42 | |
| 43 | #define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)((func_descr_t *)pentry) |
| 44 | |
| 45 | #define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \ |
| 46 | IS_TWI(instr) || IS_TDI(instr)) |
| 47 | |
| 48 | #define ARCH_SUPPORTS_KRETPROBES |
| 49 | void kretprobe_trampoline(void); |
| 50 | |
| 51 | /* Architecture specific copy of original instruction */ |
| 52 | struct arch_specific_insn { |
| 53 | /* copy of original instruction */ |
| 54 | kprobe_opcode_t *insn; |
| 55 | }; |
| 56 | |
| 57 | #ifdef CONFIG_KPROBES |
| 58 | extern int kprobe_exceptions_notify(struct notifier_block *self, |
| 59 | unsigned long val, void *data); |
| 60 | #else /* !CONFIG_KPROBES */ |
| 61 | static inline int kprobe_exceptions_notify(struct notifier_block *self, |
| 62 | unsigned long val, void *data) |
| 63 | { |
| 64 | return 0; |
| 65 | } |
| 66 | #endif |
| 67 | #endif /* _ASM_KPROBES_H */ |