projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef _ASM_KPROBES_H |
| 2 | #define _ASM_KPROBES_H | |
| 3 | /* | |
| 4 | * Kernel Probes (KProbes) | |
| 5 | * include/asm-i386/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 | */ | |
| 27 | #include <linux/types.h> | |
| 28 | #include <linux/ptrace.h> | |
| 29 | ||
| 124d90be PP |
30 | #define __ARCH_WANT_KPROBES_INSN_SLOT |
| 31 | ||
| 32 | struct kprobe; | |
| 1da177e4 LT |
33 | struct pt_regs; |
| 34 | ||
| 35 | typedef u8 kprobe_opcode_t; | |
| 36 | #define BREAKPOINT_INSTRUCTION 0xcc | |
| 311ac88f | 37 | #define RELATIVEJUMP_INSTRUCTION 0xe9 |
| 1da177e4 LT |
38 | #define MAX_INSN_SIZE 16 |
| 39 | #define MAX_STACK_SIZE 64 | |
| 40 | #define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \ | |
| 41 | (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \ | |
| 42 | ? (MAX_STACK_SIZE) \ | |
| 43 | : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) | |
| 44 | ||
| b94cce92 | 45 | #define ARCH_SUPPORTS_KRETPROBES |
| a9ad965e | 46 | #define flush_insn_slot(p) do { } while (0) |
| b94cce92 | 47 | |
| f438d914 MH |
48 | extern const int kretprobe_blacklist_size; |
| 49 | ||
| 124d90be | 50 | void arch_remove_kprobe(struct kprobe *p); |
| b94cce92 | 51 | void kretprobe_trampoline(void); |
| 1da177e4 LT |
52 | |
| 53 | /* Architecture specific copy of original instruction*/ | |
| 54 | struct arch_specific_insn { | |
| 55 | /* copy of the original instruction */ | |
| 124d90be | 56 | kprobe_opcode_t *insn; |
| 311ac88f MH |
57 | /* |
| 58 | * If this flag is not 0, this kprobe can be boost when its | |
| 59 | * post_handler and break_handler is not set. | |
| 60 | */ | |
| 61 | int boostable; | |
| 1da177e4 LT |
62 | }; |
| 63 | ||
| 9a0e3a86 AM |
64 | struct prev_kprobe { |
| 65 | struct kprobe *kp; | |
| 66 | unsigned long status; | |
| 67 | unsigned long old_eflags; | |
| 68 | unsigned long saved_eflags; | |
| 69 | }; | |
| 70 | ||
| 71 | /* per-cpu kprobe control block */ | |
| 72 | struct kprobe_ctlblk { | |
| 73 | unsigned long kprobe_status; | |
| 74 | unsigned long kprobe_old_eflags; | |
| 75 | unsigned long kprobe_saved_eflags; | |
| 76 | long *jprobe_saved_esp; | |
| 77 | struct pt_regs jprobe_saved_regs; | |
| 78 | kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE]; | |
| 79 | struct prev_kprobe prev_kprobe; | |
| 80 | }; | |
| 1da177e4 LT |
81 | |
| 82 | /* trap3/1 are intr gates for kprobes. So, restore the status of IF, | |
| 83 | * if necessary, before executing the original int3/1 (trap) handler. | |
| 84 | */ | |
| 85 | static inline void restore_interrupts(struct pt_regs *regs) | |
| 86 | { | |
| 87 | if (regs->eflags & IF_MASK) | |
| 88 | local_irq_enable(); | |
| 89 | } | |
| 90 | ||
| 1da177e4 LT |
91 | extern int kprobe_exceptions_notify(struct notifier_block *self, |
| 92 | unsigned long val, void *data); | |
| 74a0b576 | 93 | extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr); |
| 1da177e4 | 94 | #endif /* _ASM_KPROBES_H */ |