projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| bbeb3f4c SR |
1 | #ifndef _ASM_POWERPC_KPROBES_H |
| 2 | #define _ASM_POWERPC_KPROBES_H | |
| 88ced031 | 3 | #ifdef __KERNEL__ |
| 14cf11af PM |
4 | /* |
| 5 | * Kernel Probes (KProbes) | |
| 14cf11af PM |
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> | |
| 0dc036c9 | 31 | #include <linux/percpu.h> |
| 14cf11af | 32 | |
| 2d14e39d AK |
33 | #define __ARCH_WANT_KPROBES_INSN_SLOT |
| 34 | ||
| 14cf11af | 35 | struct pt_regs; |
| 0498b635 | 36 | struct kprobe; |
| 14cf11af PM |
37 | |
| 38 | typedef unsigned int kprobe_opcode_t; | |
| 39 | #define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */ | |
| 40 | #define MAX_INSN_SIZE 1 | |
| 41 | ||
| 42 | #define IS_TW(instr) (((instr) & 0xfc0007fe) == 0x7c000008) | |
| 43 | #define IS_TD(instr) (((instr) & 0xfc0007fe) == 0x7c000088) | |
| 44 | #define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000) | |
| 45 | #define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000) | |
| 46 | ||
| 3a872d89 AM |
47 | /* |
| 48 | * 64bit powerpc uses function descriptors. | |
| 49 | * Handle cases where: | |
| 50 | * - User passes a <.symbol> | |
| 51 | * - User passes a <symbol> | |
| 52 | * - User passes a non-existant symbol, kallsyms_lookup_name | |
| 53 | * returns 0. Don't deref the NULL pointer in that case | |
| 54 | */ | |
| 55 | #define kprobe_lookup_name(name, addr) \ | |
| 56 | { \ | |
| 57 | addr = (kprobe_opcode_t *)kallsyms_lookup_name(name); \ | |
| 58 | if (!(name[0] == '.') && addr) \ | |
| 59 | addr = *(kprobe_opcode_t **)addr; \ | |
| 60 | } | |
| 61 | ||
| 14cf11af PM |
62 | #define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)((func_descr_t *)pentry) |
| 63 | ||
| 64 | #define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \ | |
| 65 | IS_TWI(instr) || IS_TDI(instr)) | |
| 66 | ||
| 67 | #define ARCH_SUPPORTS_KRETPROBES | |
| e6f47f97 | 68 | #define ARCH_INACTIVE_KPROBE_COUNT 1 |
| a9ad965e | 69 | #define flush_insn_slot(p) do { } while (0) |
| e6f47f97 | 70 | |
| 14cf11af | 71 | void kretprobe_trampoline(void); |
| 0498b635 | 72 | extern void arch_remove_kprobe(struct kprobe *p); |
| 14cf11af PM |
73 | |
| 74 | /* Architecture specific copy of original instruction */ | |
| 75 | struct arch_specific_insn { | |
| 76 | /* copy of original instruction */ | |
| 77 | kprobe_opcode_t *insn; | |
| 78 | }; | |
| 79 | ||
| 0dc036c9 AM |
80 | struct prev_kprobe { |
| 81 | struct kprobe *kp; | |
| 82 | unsigned long status; | |
| 83 | unsigned long saved_msr; | |
| 84 | }; | |
| 85 | ||
| 86 | /* per-cpu kprobe control block */ | |
| 87 | struct kprobe_ctlblk { | |
| 88 | unsigned long kprobe_status; | |
| 89 | unsigned long kprobe_saved_msr; | |
| 90 | struct pt_regs jprobe_saved_regs; | |
| 91 | struct prev_kprobe prev_kprobe; | |
| 92 | }; | |
| 93 | ||
| 14cf11af | 94 | extern int kprobe_exceptions_notify(struct notifier_block *self, |
| 41dead49 | 95 | unsigned long val, void *data); |
| 88ced031 | 96 | #endif /* __KERNEL__ */ |
| bbeb3f4c | 97 | #endif /* _ASM_POWERPC_KPROBES_H */ |