1/* SPDX-License-Identifier: GPL-2.0+ */
 2#ifndef _ASM_S390_KPROBES_H
 3#define _ASM_S390_KPROBES_H
 4/*
 5 *  Kernel Probes (KProbes)
 6 *
 7 * Copyright IBM Corp. 2002, 2006
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 8 *
 9 * 2002-Oct	Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
10 *		Probes initial implementation ( includes suggestions from
11 *		Rusty Russell).
12 * 2004-Nov	Modified for PPC64 by Ananth N Mavinakayanahalli
13 *		<ananth@in.ibm.com>
14 * 2005-Dec	Used as a template for s390 by Mike Grundy
15 *		<grundym@us.ibm.com>
16 */
17#include <linux/types.h>
18#include <asm-generic/kprobes.h>
19
20#define BREAKPOINT_INSTRUCTION	0x0002
21
22#define FIXUP_PSW_NORMAL	0x08
23#define FIXUP_BRANCH_NOT_TAKEN	0x04
24#define FIXUP_RETURN_REGISTER	0x02
25#define FIXUP_NOT_REQUIRED	0x01
26
27int probe_is_prohibited_opcode(u16 *insn);
28int probe_get_fixup_type(u16 *insn);
29int probe_is_insn_relative_long(u16 *insn);
30
31#ifdef CONFIG_KPROBES
32#include <linux/ptrace.h>
33#include <linux/percpu.h>
34#include <linux/sched/task_stack.h>
35
36#define __ARCH_WANT_KPROBES_INSN_SLOT
37
38struct pt_regs;
39struct kprobe;
40
41typedef u16 kprobe_opcode_t;
 
42
43/* Maximum instruction size is 3 (16bit) halfwords: */
44#define MAX_INSN_SIZE		0x0003
45#define MAX_STACK_SIZE		64
46#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
47	(((unsigned long)task_stack_page(current)) + THREAD_SIZE - (ADDR))) \
48	? (MAX_STACK_SIZE) \
49	: (((unsigned long)task_stack_page(current)) + THREAD_SIZE - (ADDR)))
50
51#define kretprobe_blacklist_size 0
52
 
 
 
 
 
 
 
53/* Architecture specific copy of original instruction */
54struct arch_specific_insn {
55	/* copy of original instruction */
56	kprobe_opcode_t *insn;
57};
58
59struct prev_kprobe {
60	struct kprobe *kp;
61	unsigned long status;
62};
63
64/* per-cpu kprobe control block */
65struct kprobe_ctlblk {
66	unsigned long kprobe_status;
67	unsigned long kprobe_saved_imask;
68	unsigned long kprobe_saved_ctl[3];
69	struct prev_kprobe prev_kprobe;
 
 
70};
71
72void arch_remove_kprobe(struct kprobe *p);
73void __kretprobe_trampoline(void);
74void trampoline_probe_handler(struct pt_regs *regs);
75
76int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
77int kprobe_exceptions_notify(struct notifier_block *self,
78	unsigned long val, void *data);
79
80#define flush_insn_slot(p)	do { } while (0)
81
82#endif /* CONFIG_KPROBES */
83#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 (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 */