ia64/linux-2.6.18-xen.hg

view include/asm-i386/kprobes.h @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children
line source
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>
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 JPROBE_ENTRY(pentry) (kprobe_opcode_t *)pentry
46 #define ARCH_SUPPORTS_KRETPROBES
47 #define ARCH_INACTIVE_KPROBE_COUNT 0
48 #define flush_insn_slot(p) do { } while (0)
50 void arch_remove_kprobe(struct kprobe *p);
51 void kretprobe_trampoline(void);
53 /* Architecture specific copy of original instruction*/
54 struct arch_specific_insn {
55 /* copy of the original instruction */
56 kprobe_opcode_t *insn;
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;
62 };
64 struct prev_kprobe {
65 struct kprobe *kp;
66 unsigned long status;
67 unsigned long old_eflags;
68 unsigned long saved_eflags;
69 };
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 };
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 }
91 extern int kprobe_exceptions_notify(struct notifier_block *self,
92 unsigned long val, void *data);
93 #endif /* _ASM_KPROBES_H */