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Linux kernel mirror (for testing)
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1#ifndef _ASM_KPROBES_H
2#define _ASM_KPROBES_H
3/*
4 * Kernel Probes (KProbes)
5 * include/asm-ia64/kprobes.h
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
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 * Copyright (C) IBM Corporation, 2002, 2004
22 * Copyright (C) Intel Corporation, 2005
23 *
24 * 2005-Apr Rusty Lynch <rusty.lynch@intel.com> and Anil S Keshavamurthy
25 * <anil.s.keshavamurthy@intel.com> adapted from i386
26 */
27#include <linux/types.h>
28#include <linux/ptrace.h>
29#include <linux/percpu.h>
30#include <asm/break.h>
31
32#define __ARCH_WANT_KPROBES_INSN_SLOT
33#define MAX_INSN_SIZE 2 /* last half is for kprobe-booster */
34#define BREAK_INST (long)(__IA64_BREAK_KPROBE << 6)
35#define NOP_M_INST (long)(1<<27)
36#define BRL_INST(i1, i2) ((long)((0xcL << 37) | /* brl */ \
37 (0x1L << 12) | /* many */ \
38 (((i1) & 1) << 36) | ((i2) << 13))) /* imm */
39
40typedef union cmp_inst {
41 struct {
42 unsigned long long qp : 6;
43 unsigned long long p1 : 6;
44 unsigned long long c : 1;
45 unsigned long long r2 : 7;
46 unsigned long long r3 : 7;
47 unsigned long long p2 : 6;
48 unsigned long long ta : 1;
49 unsigned long long x2 : 2;
50 unsigned long long tb : 1;
51 unsigned long long opcode : 4;
52 unsigned long long reserved : 23;
53 }f;
54 unsigned long long l;
55} cmp_inst_t;
56
57struct kprobe;
58
59typedef struct _bundle {
60 struct {
61 unsigned long long template : 5;
62 unsigned long long slot0 : 41;
63 unsigned long long slot1_p0 : 64-46;
64 } quad0;
65 struct {
66 unsigned long long slot1_p1 : 41 - (64-46);
67 unsigned long long slot2 : 41;
68 } quad1;
69} __attribute__((__aligned__(16))) bundle_t;
70
71struct prev_kprobe {
72 struct kprobe *kp;
73 unsigned long status;
74};
75
76#define MAX_PARAM_RSE_SIZE (0x60+0x60/0x3f)
77/* per-cpu kprobe control block */
78#define ARCH_PREV_KPROBE_SZ 2
79struct kprobe_ctlblk {
80 unsigned long kprobe_status;
81 struct pt_regs jprobe_saved_regs;
82 unsigned long jprobes_saved_stacked_regs[MAX_PARAM_RSE_SIZE];
83 unsigned long *bsp;
84 unsigned long cfm;
85 atomic_t prev_kprobe_index;
86 struct prev_kprobe prev_kprobe[ARCH_PREV_KPROBE_SZ];
87};
88
89#define kretprobe_blacklist_size 0
90
91#define SLOT0_OPCODE_SHIFT (37)
92#define SLOT1_p1_OPCODE_SHIFT (37 - (64-46))
93#define SLOT2_OPCODE_SHIFT (37)
94
95#define INDIRECT_CALL_OPCODE (1)
96#define IP_RELATIVE_CALL_OPCODE (5)
97#define IP_RELATIVE_BRANCH_OPCODE (4)
98#define IP_RELATIVE_PREDICT_OPCODE (7)
99#define LONG_BRANCH_OPCODE (0xC)
100#define LONG_CALL_OPCODE (0xD)
101#define flush_insn_slot(p) do { } while (0)
102
103typedef struct kprobe_opcode {
104 bundle_t bundle;
105} kprobe_opcode_t;
106
107struct fnptr {
108 unsigned long ip;
109 unsigned long gp;
110};
111
112/* Architecture specific copy of original instruction*/
113struct arch_specific_insn {
114 /* copy of the instruction to be emulated */
115 kprobe_opcode_t *insn;
116 #define INST_FLAG_FIX_RELATIVE_IP_ADDR 1
117 #define INST_FLAG_FIX_BRANCH_REG 2
118 #define INST_FLAG_BREAK_INST 4
119 #define INST_FLAG_BOOSTABLE 8
120 unsigned long inst_flag;
121 unsigned short target_br_reg;
122 unsigned short slot;
123};
124
125extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
126extern int kprobe_exceptions_notify(struct notifier_block *self,
127 unsigned long val, void *data);
128
129extern void invalidate_stacked_regs(void);
130extern void flush_register_stack(void);
131extern void arch_remove_kprobe(struct kprobe *p);
132
133#endif /* _ASM_KPROBES_H */