1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 *  Kernel Probes (KProbes)
 4 *  include/asm-mips/kprobes.h
 5 *
 6 *  Copyright 2006 Sony Corp.
 7 *  Copyright 2010 Cavium Networks
 
 
 
 
 
 
 
 
 
 
 
 
 
 8 */
 9
10#ifndef _ASM_KPROBES_H
11#define _ASM_KPROBES_H
12
13#include <asm-generic/kprobes.h>
14
15#ifdef CONFIG_KPROBES
16#include <linux/ptrace.h>
17#include <linux/types.h>
18
19#include <asm/cacheflush.h>
20#include <asm/kdebug.h>
21#include <asm/inst.h>
22
23#define	 __ARCH_WANT_KPROBES_INSN_SLOT
24
25struct kprobe;
26struct pt_regs;
27
28typedef union mips_instruction kprobe_opcode_t;
29
30#define MAX_INSN_SIZE 2
31
32#define flush_insn_slot(p)						\
33do {									\
34	if (p->addr)							\
35		flush_icache_range((unsigned long)p->addr,		\
36			   (unsigned long)p->addr +			\
37			   (MAX_INSN_SIZE * sizeof(kprobe_opcode_t)));	\
38} while (0)
39
40
41#define kretprobe_blacklist_size 0
42
43void arch_remove_kprobe(struct kprobe *p);
44int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
45
46/* Architecture specific copy of original instruction*/
47struct arch_specific_insn {
48	/* copy of the original instruction */
49	kprobe_opcode_t *insn;
50};
51
52struct prev_kprobe {
53	struct kprobe *kp;
54	unsigned long status;
55	unsigned long old_SR;
56	unsigned long saved_SR;
57	unsigned long saved_epc;
58};
59
 
 
 
 
 
 
 
 
 
 
60#define SKIP_DELAYSLOT 0x0001
61
62/* per-cpu kprobe control block */
63struct kprobe_ctlblk {
64	unsigned long kprobe_status;
65	unsigned long kprobe_old_SR;
66	unsigned long kprobe_saved_SR;
67	unsigned long kprobe_saved_epc;
 
 
68	/* Per-thread fields, used while emulating branches */
69	unsigned long flags;
70	unsigned long target_epc;
 
71	struct prev_kprobe prev_kprobe;
72};
73
74extern int kprobe_exceptions_notify(struct notifier_block *self,
75				    unsigned long val, void *data);
76
77#endif /* CONFIG_KPROBES */
78#endif /* _ASM_KPROBES_H */

 
  1/*
  2 *  Kernel Probes (KProbes)
  3 *  include/asm-mips/kprobes.h
  4 *
  5 *  Copyright 2006 Sony Corp.
  6 *  Copyright 2010 Cavium Networks
  7 *
  8 *  This program is free software; you can redistribute it and/or modify
  9 *  it under the terms of the GNU General Public License as published by
 10 *  the Free Software Foundation; version 2 of the License.
 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
 22#ifndef _ASM_KPROBES_H
 23#define _ASM_KPROBES_H
 24
 25#include <asm-generic/kprobes.h>
 26
 27#ifdef CONFIG_KPROBES
 28#include <linux/ptrace.h>
 29#include <linux/types.h>
 30
 31#include <asm/cacheflush.h>
 32#include <asm/kdebug.h>
 33#include <asm/inst.h>
 34
 35#define	 __ARCH_WANT_KPROBES_INSN_SLOT
 36
 37struct kprobe;
 38struct pt_regs;
 39
 40typedef union mips_instruction kprobe_opcode_t;
 41
 42#define MAX_INSN_SIZE 2
 43
 44#define flush_insn_slot(p)						\
 45do {									\
 46	if (p->addr)							\
 47		flush_icache_range((unsigned long)p->addr,		\
 48			   (unsigned long)p->addr +			\
 49			   (MAX_INSN_SIZE * sizeof(kprobe_opcode_t)));	\
 50} while (0)
 51
 52
 53#define kretprobe_blacklist_size 0
 54
 55void arch_remove_kprobe(struct kprobe *p);
 
 56
 57/* Architecture specific copy of original instruction*/
 58struct arch_specific_insn {
 59	/* copy of the original instruction */
 60	kprobe_opcode_t *insn;
 61};
 62
 63struct prev_kprobe {
 64	struct kprobe *kp;
 65	unsigned long status;
 66	unsigned long old_SR;
 67	unsigned long saved_SR;
 68	unsigned long saved_epc;
 69};
 70
 71#define MAX_JPROBES_STACK_SIZE 128
 72#define MAX_JPROBES_STACK_ADDR \
 73	(((unsigned long)current_thread_info()) + THREAD_SIZE - 32 - sizeof(struct pt_regs))
 74
 75#define MIN_JPROBES_STACK_SIZE(ADDR)					\
 76	((((ADDR) + MAX_JPROBES_STACK_SIZE) > MAX_JPROBES_STACK_ADDR)	\
 77		? MAX_JPROBES_STACK_ADDR - (ADDR)			\
 78		: MAX_JPROBES_STACK_SIZE)
 79
 80
 81#define SKIP_DELAYSLOT 0x0001
 82
 83/* per-cpu kprobe control block */
 84struct kprobe_ctlblk {
 85	unsigned long kprobe_status;
 86	unsigned long kprobe_old_SR;
 87	unsigned long kprobe_saved_SR;
 88	unsigned long kprobe_saved_epc;
 89	unsigned long jprobe_saved_sp;
 90	struct pt_regs jprobe_saved_regs;
 91	/* Per-thread fields, used while emulating branches */
 92	unsigned long flags;
 93	unsigned long target_epc;
 94	u8 jprobes_stack[MAX_JPROBES_STACK_SIZE];
 95	struct prev_kprobe prev_kprobe;
 96};
 97
 98extern int kprobe_exceptions_notify(struct notifier_block *self,
 99				    unsigned long val, void *data);
100
101#endif /* CONFIG_KPROBES */
102#endif /* _ASM_KPROBES_H */