tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 flush_icache_range((unsigned long)p->addr, \
47 (unsigned long)p->addr + \
48 (MAX_INSN_SIZE * sizeof(kprobe_opcode_t))); \
49} while (0)
50
51
52#define kretprobe_blacklist_size 0
53
54void arch_remove_kprobe(struct kprobe *p);
55
56/* Architecture specific copy of original instruction*/
57struct arch_specific_insn {
58 /* copy of the original instruction */
59 kprobe_opcode_t *insn;
60};
61
62struct prev_kprobe {
63 struct kprobe *kp;
64 unsigned long status;
65 unsigned long old_SR;
66 unsigned long saved_SR;
67 unsigned long saved_epc;
68};
69
70#define MAX_JPROBES_STACK_SIZE 128
71#define MAX_JPROBES_STACK_ADDR \
72 (((unsigned long)current_thread_info()) + THREAD_SIZE - 32 - sizeof(struct pt_regs))
73
74#define MIN_JPROBES_STACK_SIZE(ADDR) \
75 ((((ADDR) + MAX_JPROBES_STACK_SIZE) > MAX_JPROBES_STACK_ADDR) \
76 ? MAX_JPROBES_STACK_ADDR - (ADDR) \
77 : MAX_JPROBES_STACK_SIZE)
78
79
80#define SKIP_DELAYSLOT 0x0001
81
82/* per-cpu kprobe control block */
83struct kprobe_ctlblk {
84 unsigned long kprobe_status;
85 unsigned long kprobe_old_SR;
86 unsigned long kprobe_saved_SR;
87 unsigned long kprobe_saved_epc;
88 unsigned long jprobe_saved_sp;
89 struct pt_regs jprobe_saved_regs;
90 /* Per-thread fields, used while emulating branches */
91 unsigned long flags;
92 unsigned long target_epc;
93 u8 jprobes_stack[MAX_JPROBES_STACK_SIZE];
94 struct prev_kprobe prev_kprobe;
95};
96
97extern int kprobe_exceptions_notify(struct notifier_block *self,
98 unsigned long val, void *data);
99
100#endif /* CONFIG_KPROBES */
101#endif /* _ASM_KPROBES_H */