projects / mirror_ubuntu-artful-kernel.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-x86_64/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 | * 2004-Oct Prasanna S Panchamukhi <prasanna@in.ibm.com> and Jim Keniston | |
| 24 | * kenistoj@us.ibm.com adopted from i386. | |
| 25 | */ | |
| 26 | #include <linux/types.h> | |
| 27 | #include <linux/ptrace.h> | |
| e7a510f9 | 28 | #include <linux/percpu.h> |
| 1da177e4 | 29 | |
| 2d14e39d AK |
30 | #define __ARCH_WANT_KPROBES_INSN_SLOT |
| 31 | ||
| 1da177e4 | 32 | struct pt_regs; |
| 0498b635 | 33 | struct kprobe; |
| 1da177e4 LT |
34 | |
| 35 | typedef u8 kprobe_opcode_t; | |
| 36 | #define BREAKPOINT_INSTRUCTION 0xcc | |
| 37 | #define MAX_INSN_SIZE 15 | |
| 38 | #define MAX_STACK_SIZE 64 | |
| 39 | #define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \ | |
| 40 | (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \ | |
| 41 | ? (MAX_STACK_SIZE) \ | |
| 42 | : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) | |
| 43 | ||
| 44 | #define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)pentry | |
| 73649dab | 45 | #define ARCH_SUPPORTS_KRETPROBES |
| e6f47f97 | 46 | #define ARCH_INACTIVE_KPROBE_COUNT 1 |
| 73649dab RL |
47 | |
| 48 | void kretprobe_trampoline(void); | |
| 0498b635 | 49 | extern void arch_remove_kprobe(struct kprobe *p); |
| a9ad965e | 50 | #define flush_insn_slot(p) do { } while (0) |
| 1da177e4 LT |
51 | |
| 52 | /* Architecture specific copy of original instruction*/ | |
| 53 | struct arch_specific_insn { | |
| 54 | /* copy of the original instruction */ | |
| 55 | kprobe_opcode_t *insn; | |
| 56 | }; | |
| 57 | ||
| e7a510f9 AM |
58 | struct prev_kprobe { |
| 59 | struct kprobe *kp; | |
| 60 | unsigned long status; | |
| 61 | unsigned long old_rflags; | |
| 62 | unsigned long saved_rflags; | |
| 63 | }; | |
| 64 | ||
| 65 | /* per-cpu kprobe control block */ | |
| 66 | struct kprobe_ctlblk { | |
| 67 | unsigned long kprobe_status; | |
| 68 | unsigned long kprobe_old_rflags; | |
| 69 | unsigned long kprobe_saved_rflags; | |
| 70 | long *jprobe_saved_rsp; | |
| 71 | struct pt_regs jprobe_saved_regs; | |
| 72 | kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE]; | |
| 73 | struct prev_kprobe prev_kprobe; | |
| 74 | }; | |
| 75 | ||
| 1da177e4 LT |
76 | /* trap3/1 are intr gates for kprobes. So, restore the status of IF, |
| 77 | * if necessary, before executing the original int3/1 (trap) handler. | |
| 78 | */ | |
| 79 | static inline void restore_interrupts(struct pt_regs *regs) | |
| 80 | { | |
| 81 | if (regs->eflags & IF_MASK) | |
| 82 | local_irq_enable(); | |
| 83 | } | |
| 84 | ||
| 85 | extern int post_kprobe_handler(struct pt_regs *regs); | |
| 86 | extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr); | |
| 87 | extern int kprobe_handler(struct pt_regs *regs); | |
| 88 | ||
| 89 | extern int kprobe_exceptions_notify(struct notifier_block *self, | |
| 90 | unsigned long val, void *data); | |
| 91 | #endif /* _ASM_KPROBES_H */ |