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1#ifndef _ASM_S390_KPROBES_H
2#define _ASM_S390_KPROBES_H
3/*
4 * Kernel Probes (KProbes)
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 *
20 * Copyright (C) IBM Corporation, 2002, 2006
21 *
22 * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
23 * Probes initial implementation ( includes suggestions from
24 * Rusty Russell).
25 * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli
26 * <ananth@in.ibm.com>
27 * 2005-Dec Used as a template for s390 by Mike Grundy
28 * <grundym@us.ibm.com>
29 */
30#include <linux/types.h>
31#include <linux/ptrace.h>
32#include <linux/percpu.h>
33
34struct pt_regs;
35struct kprobe;
36
37typedef u16 kprobe_opcode_t;
38#define BREAKPOINT_INSTRUCTION 0x0002
39
40/* Maximum instruction size is 3 (16bit) halfwords: */
41#define MAX_INSN_SIZE 0x0003
42#define MAX_STACK_SIZE 64
43#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
44 (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \
45 ? (MAX_STACK_SIZE) \
46 : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR)))
47
48#define kretprobe_blacklist_size 0
49
50#define KPROBE_SWAP_INST 0x10
51
52#define FIXUP_PSW_NORMAL 0x08
53#define FIXUP_BRANCH_NOT_TAKEN 0x04
54#define FIXUP_RETURN_REGISTER 0x02
55#define FIXUP_NOT_REQUIRED 0x01
56
57/* Architecture specific copy of original instruction */
58struct arch_specific_insn {
59 /* copy of original instruction */
60 kprobe_opcode_t insn[MAX_INSN_SIZE];
61};
62
63struct prev_kprobe {
64 struct kprobe *kp;
65 unsigned long status;
66};
67
68/* per-cpu kprobe control block */
69struct kprobe_ctlblk {
70 unsigned long kprobe_status;
71 unsigned long kprobe_saved_imask;
72 unsigned long kprobe_saved_ctl[3];
73 struct prev_kprobe prev_kprobe;
74 struct pt_regs jprobe_saved_regs;
75 kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
76};
77
78void arch_remove_kprobe(struct kprobe *p);
79void kretprobe_trampoline(void);
80
81int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
82int kprobe_exceptions_notify(struct notifier_block *self,
83 unsigned long val, void *data);
84
85#define flush_insn_slot(p) do { } while (0)
86
87#endif /* _ASM_S390_KPROBES_H */
1#ifndef _ASM_S390_KPROBES_H
2#define _ASM_S390_KPROBES_H
3/*
4 * Kernel Probes (KProbes)
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 *
20 * Copyright IBM Corp. 2002, 2006
21 *
22 * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
23 * Probes initial implementation ( includes suggestions from
24 * Rusty Russell).
25 * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli
26 * <ananth@in.ibm.com>
27 * 2005-Dec Used as a template for s390 by Mike Grundy
28 * <grundym@us.ibm.com>
29 */
30#include <linux/types.h>
31#include <linux/ptrace.h>
32#include <linux/percpu.h>
33
34#define __ARCH_WANT_KPROBES_INSN_SLOT
35
36struct pt_regs;
37struct kprobe;
38
39typedef u16 kprobe_opcode_t;
40#define BREAKPOINT_INSTRUCTION 0x0002
41
42/* Maximum instruction size is 3 (16bit) halfwords: */
43#define MAX_INSN_SIZE 0x0003
44#define MAX_STACK_SIZE 64
45#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
46 (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \
47 ? (MAX_STACK_SIZE) \
48 : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR)))
49
50#define kretprobe_blacklist_size 0
51
52#define KPROBE_SWAP_INST 0x10
53
54#define FIXUP_PSW_NORMAL 0x08
55#define FIXUP_BRANCH_NOT_TAKEN 0x04
56#define FIXUP_RETURN_REGISTER 0x02
57#define FIXUP_NOT_REQUIRED 0x01
58
59/* Architecture specific copy of original instruction */
60struct arch_specific_insn {
61 /* copy of original instruction */
62 kprobe_opcode_t *insn;
63};
64
65struct prev_kprobe {
66 struct kprobe *kp;
67 unsigned long status;
68};
69
70/* per-cpu kprobe control block */
71struct kprobe_ctlblk {
72 unsigned long kprobe_status;
73 unsigned long kprobe_saved_imask;
74 unsigned long kprobe_saved_ctl[3];
75 struct prev_kprobe prev_kprobe;
76 struct pt_regs jprobe_saved_regs;
77 kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
78};
79
80void arch_remove_kprobe(struct kprobe *p);
81void kretprobe_trampoline(void);
82
83int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
84int kprobe_exceptions_notify(struct notifier_block *self,
85 unsigned long val, void *data);
86
87#define flush_insn_slot(p) do { } while (0)
88
89#endif /* _ASM_S390_KPROBES_H */