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 <linux/ptrace.h>
26#include <linux/types.h>
27
28#include <asm/cacheflush.h>
29#include <asm/kdebug.h>
30#include <asm/inst.h>
31
32#define  __ARCH_WANT_KPROBES_INSN_SLOT
33
34struct kprobe;
35struct pt_regs;
36
37typedef union mips_instruction kprobe_opcode_t;
38
39#define MAX_INSN_SIZE 2
40
41#define flush_insn_slot(p)						\
42do {									\
43	flush_icache_range((unsigned long)p->addr,			\
 
44			   (unsigned long)p->addr +			\
45			   (MAX_INSN_SIZE * sizeof(kprobe_opcode_t)));	\
46} while (0)
47
48
49#define kretprobe_blacklist_size 0
50
51void arch_remove_kprobe(struct kprobe *p);
 
52
53/* Architecture specific copy of original instruction*/
54struct arch_specific_insn {
55	/* copy of the original instruction */
56	kprobe_opcode_t *insn;
57};
58
59struct prev_kprobe {
60	struct kprobe *kp;
61	unsigned long status;
62	unsigned long old_SR;
63	unsigned long saved_SR;
64	unsigned long saved_epc;
65};
66
67#define MAX_JPROBES_STACK_SIZE 128
68#define MAX_JPROBES_STACK_ADDR \
69	(((unsigned long)current_thread_info()) + THREAD_SIZE - 32 - sizeof(struct pt_regs))
70
71#define MIN_JPROBES_STACK_SIZE(ADDR)					\
72	((((ADDR) + MAX_JPROBES_STACK_SIZE) > MAX_JPROBES_STACK_ADDR)	\
73		? MAX_JPROBES_STACK_ADDR - (ADDR)			\
74		: MAX_JPROBES_STACK_SIZE)
75
76
77/* per-cpu kprobe control block */
78struct kprobe_ctlblk {
79	unsigned long kprobe_status;
80	unsigned long kprobe_old_SR;
81	unsigned long kprobe_saved_SR;
82	unsigned long kprobe_saved_epc;
83	unsigned long jprobe_saved_sp;
84	struct pt_regs jprobe_saved_regs;
85	u8 jprobes_stack[MAX_JPROBES_STACK_SIZE];
86	struct prev_kprobe prev_kprobe;
87};
88
89extern int kprobe_exceptions_notify(struct notifier_block *self,
90				    unsigned long val, void *data);
91
92#endif				/* _ASM_KPROBES_H */