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| bbeb3f4c SR |
1 | #ifndef _ASM_POWERPC_KPROBES_H |
| 2 | #define _ASM_POWERPC_KPROBES_H | |
| 14cf11af PM |
3 | /* |
| 4 | * Kernel Probes (KProbes) | |
| 14cf11af PM |
5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License as published by | |
| 8 | * the Free Software Foundation; either version 2 of the License, or | |
| 9 | * (at your option) any later version. | |
| 10 | * | |
| 11 | * This program is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | * GNU General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU General Public License | |
| 17 | * along with this program; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 19 | * | |
| 20 | * Copyright (C) IBM Corporation, 2002, 2004 | |
| 21 | * | |
| 22 | * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel | |
| 23 | * Probes initial implementation ( includes suggestions from | |
| 24 | * Rusty Russell). | |
| 25 | * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli | |
| 26 | * <ananth@in.ibm.com> | |
| 27 | */ | |
| 28 | #include <linux/types.h> | |
| 29 | #include <linux/ptrace.h> | |
| 30 | ||
| 31 | struct pt_regs; | |
| 32 | ||
| 33 | typedef unsigned int kprobe_opcode_t; | |
| 34 | #define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */ | |
| 35 | #define MAX_INSN_SIZE 1 | |
| 36 | ||
| 37 | #define IS_TW(instr) (((instr) & 0xfc0007fe) == 0x7c000008) | |
| 38 | #define IS_TD(instr) (((instr) & 0xfc0007fe) == 0x7c000088) | |
| 39 | #define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000) | |
| 40 | #define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000) | |
| 41 | ||
| 42 | #define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)((func_descr_t *)pentry) | |
| 43 | ||
| 44 | #define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \ | |
| 45 | IS_TWI(instr) || IS_TDI(instr)) | |
| 46 | ||
| 47 | #define ARCH_SUPPORTS_KRETPROBES | |
| 48 | void kretprobe_trampoline(void); | |
| 49 | ||
| 50 | /* Architecture specific copy of original instruction */ | |
| 51 | struct arch_specific_insn { | |
| 52 | /* copy of original instruction */ | |
| 53 | kprobe_opcode_t *insn; | |
| 54 | }; | |
| 55 | ||
| 56 | #ifdef CONFIG_KPROBES | |
| 57 | extern int kprobe_exceptions_notify(struct notifier_block *self, | |
| 58 | unsigned long val, void *data); | |
| 59 | #else /* !CONFIG_KPROBES */ | |
| 60 | static inline int kprobe_exceptions_notify(struct notifier_block *self, | |
| 61 | unsigned long val, void *data) | |
| 62 | { | |
| 63 | return 0; | |
| 64 | } | |
| 65 | #endif | |
| bbeb3f4c | 66 | #endif /* _ASM_POWERPC_KPROBES_H */ |