projects / deliverable / linux.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> |
| 7118e7e6 | 32 | #include <asm/probes.h> |
| 14cf11af | 33 | |
| 2d14e39d AK |
34 | #define __ARCH_WANT_KPROBES_INSN_SLOT |
| 35 | ||
| 14cf11af | 36 | struct pt_regs; |
| 0498b635 | 37 | struct kprobe; |
| 14cf11af | 38 | |
| 28e1e58f | 39 | typedef ppc_opcode_t kprobe_opcode_t; |
| 14cf11af PM |
40 | #define MAX_INSN_SIZE 1 |
| 41 | ||
| 82090035 | 42 | #ifdef CONFIG_PPC64 |
| 3a872d89 AM |
43 | /* |
| 44 | * 64bit powerpc uses function descriptors. | |
| 45 | * Handle cases where: | |
| 412998cf AM |
46 | * - User passes a <.symbol> or <module:.symbol> |
| 47 | * - User passes a <symbol> or <module:symbol> | |
| 25985edc | 48 | * - User passes a non-existent symbol, kallsyms_lookup_name |
| 3a872d89 AM |
49 | * returns 0. Don't deref the NULL pointer in that case |
| 50 | */ | |
| 51 | #define kprobe_lookup_name(name, addr) \ | |
| 52 | { \ | |
| 53 | addr = (kprobe_opcode_t *)kallsyms_lookup_name(name); \ | |
| 412998cf AM |
54 | if (addr) { \ |
| 55 | char *colon; \ | |
| 56 | if ((colon = strchr(name, ':')) != NULL) { \ | |
| 57 | colon++; \ | |
| 58 | if (*colon != '\0' && *colon != '.') \ | |
| 59 | addr = *(kprobe_opcode_t **)addr; \ | |
| 60 | } else if (name[0] != '.') \ | |
| 61 | addr = *(kprobe_opcode_t **)addr; \ | |
| eb609e52 | 62 | } else { \ |
| 9281acea | 63 | char dot_name[KSYM_NAME_LEN]; \ |
| eb609e52 SD |
64 | dot_name[0] = '.'; \ |
| 65 | dot_name[1] = '\0'; \ | |
| 9281acea | 66 | strncat(dot_name, name, KSYM_NAME_LEN - 2); \ |
| eb609e52 | 67 | addr = (kprobe_opcode_t *)kallsyms_lookup_name(dot_name); \ |
| 412998cf | 68 | } \ |
| 3a872d89 | 69 | } |
| 82090035 | 70 | #endif |
| 14cf11af | 71 | |
| a9ad965e | 72 | #define flush_insn_slot(p) do { } while (0) |
| f438d914 | 73 | #define kretprobe_blacklist_size 0 |
| e6f47f97 | 74 | |
| 14cf11af | 75 | void kretprobe_trampoline(void); |
| 0498b635 | 76 | extern void arch_remove_kprobe(struct kprobe *p); |
| 14cf11af PM |
77 | |
| 78 | /* Architecture specific copy of original instruction */ | |
| 79 | struct arch_specific_insn { | |
| 80 | /* copy of original instruction */ | |
| 81 | kprobe_opcode_t *insn; | |
| e6349a95 AM |
82 | /* |
| 83 | * Set in kprobes code, initially to 0. If the instruction can be | |
| 84 | * eumulated, this is set to 1, if not, to -1. | |
| 85 | */ | |
| 86 | int boostable; | |
| 14cf11af PM |
87 | }; |
| 88 | ||
| 0dc036c9 AM |
89 | struct prev_kprobe { |
| 90 | struct kprobe *kp; | |
| 91 | unsigned long status; | |
| 92 | unsigned long saved_msr; | |
| 93 | }; | |
| 94 | ||
| 95 | /* per-cpu kprobe control block */ | |
| 96 | struct kprobe_ctlblk { | |
| 97 | unsigned long kprobe_status; | |
| 98 | unsigned long kprobe_saved_msr; | |
| 99 | struct pt_regs jprobe_saved_regs; | |
| 100 | struct prev_kprobe prev_kprobe; | |
| 101 | }; | |
| 102 | ||
| 14cf11af | 103 | extern int kprobe_exceptions_notify(struct notifier_block *self, |
| 41dead49 | 104 | unsigned long val, void *data); |
| 9f90b997 | 105 | extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr); |
| 88ced031 | 106 | #endif /* __KERNEL__ */ |
| bbeb3f4c | 107 | #endif /* _ASM_POWERPC_KPROBES_H */ |