ACPI: thinkpad-acpi: trivial fix to documentation
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / asm-i386 / kprobes.h
blob06f7303c30ca15d111061cfcace36ec043b9362d
1 #ifndef _ASM_KPROBES_H
2 #define _ASM_KPROBES_H
3 /*
4 * Kernel Probes (KProbes)
5 * include/asm-i386/kprobes.h
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.
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.
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.
21 * Copyright (C) IBM Corporation, 2002, 2004
23 * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
24 * Probes initial implementation ( includes suggestions from
25 * Rusty Russell).
27 #include <linux/types.h>
28 #include <linux/ptrace.h>
30 #define __ARCH_WANT_KPROBES_INSN_SLOT
32 struct kprobe;
33 struct pt_regs;
35 typedef u8 kprobe_opcode_t;
36 #define BREAKPOINT_INSTRUCTION 0xcc
37 #define RELATIVEJUMP_INSTRUCTION 0xe9
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)))
45 #define ARCH_SUPPORTS_KRETPROBES
46 #define ARCH_INACTIVE_KPROBE_COUNT 0
47 #define flush_insn_slot(p) do { } while (0)
49 void arch_remove_kprobe(struct kprobe *p);
50 void kretprobe_trampoline(void);
52 /* Architecture specific copy of original instruction*/
53 struct arch_specific_insn {
54 /* copy of the original instruction */
55 kprobe_opcode_t *insn;
57 * If this flag is not 0, this kprobe can be boost when its
58 * post_handler and break_handler is not set.
60 int boostable;
63 struct prev_kprobe {
64 struct kprobe *kp;
65 unsigned long status;
66 unsigned long old_eflags;
67 unsigned long saved_eflags;
70 /* per-cpu kprobe control block */
71 struct kprobe_ctlblk {
72 unsigned long kprobe_status;
73 unsigned long kprobe_old_eflags;
74 unsigned long kprobe_saved_eflags;
75 long *jprobe_saved_esp;
76 struct pt_regs jprobe_saved_regs;
77 kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
78 struct prev_kprobe prev_kprobe;
81 /* trap3/1 are intr gates for kprobes. So, restore the status of IF,
82 * if necessary, before executing the original int3/1 (trap) handler.
84 static inline void restore_interrupts(struct pt_regs *regs)
86 if (regs->eflags & IF_MASK)
87 local_irq_enable();
90 extern int kprobe_exceptions_notify(struct notifier_block *self,
91 unsigned long val, void *data);
92 #endif /* _ASM_KPROBES_H */