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Anil S Keshavamurthyfd7b2312005-06-23 00:09:28 -07001#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>
Ananth N Mavinakayanahalli8a5c4dc2005-11-07 01:00:09 -080029#include <linux/percpu.h>
Anil S Keshavamurthyfd7b2312005-06-23 00:09:28 -070030#include <asm/break.h>
31
bibo mao214ddde2006-09-26 11:20:37 -070032#define __ARCH_WANT_KPROBES_INSN_SLOT
33#define MAX_INSN_SIZE 1
Anil S Keshavamurthyfd7b2312005-06-23 00:09:28 -070034#define BREAK_INST (long)(__IA64_BREAK_KPROBE << 6)
35
Anil S Keshavamurthy1674eaf2005-06-23 00:09:33 -070036typedef union cmp_inst {
37 struct {
38 unsigned long long qp : 6;
39 unsigned long long p1 : 6;
40 unsigned long long c : 1;
41 unsigned long long r2 : 7;
42 unsigned long long r3 : 7;
43 unsigned long long p2 : 6;
44 unsigned long long ta : 1;
45 unsigned long long x2 : 2;
46 unsigned long long tb : 1;
47 unsigned long long opcode : 4;
48 unsigned long long reserved : 23;
49 }f;
50 unsigned long long l;
51} cmp_inst_t;
52
Rusty Lynch8bc76772005-06-23 00:09:30 -070053struct kprobe;
54
Anil S Keshavamurthyfd7b2312005-06-23 00:09:28 -070055typedef struct _bundle {
56 struct {
57 unsigned long long template : 5;
58 unsigned long long slot0 : 41;
59 unsigned long long slot1_p0 : 64-46;
60 } quad0;
61 struct {
62 unsigned long long slot1_p1 : 41 - (64-46);
63 unsigned long long slot2 : 41;
64 } quad1;
65} __attribute__((__aligned__(16))) bundle_t;
66
Ananth N Mavinakayanahalli8a5c4dc2005-11-07 01:00:09 -080067struct prev_kprobe {
68 struct kprobe *kp;
69 unsigned long status;
70};
71
Zhang Yanmind3ef1f52006-01-13 14:45:21 -080072#define MAX_PARAM_RSE_SIZE (0x60+0x60/0x3f)
Ananth N Mavinakayanahalli8a5c4dc2005-11-07 01:00:09 -080073/* per-cpu kprobe control block */
Anil S Keshavamurthycdc7dbd2007-05-11 09:38:40 -070074#define ARCH_PREV_KPROBE_SZ 2
Ananth N Mavinakayanahalli8a5c4dc2005-11-07 01:00:09 -080075struct kprobe_ctlblk {
76 unsigned long kprobe_status;
77 struct pt_regs jprobe_saved_regs;
Zhang Yanmind3ef1f52006-01-13 14:45:21 -080078 unsigned long jprobes_saved_stacked_regs[MAX_PARAM_RSE_SIZE];
79 unsigned long *bsp;
80 unsigned long cfm;
Anil S Keshavamurthycdc7dbd2007-05-11 09:38:40 -070081 atomic_t prev_kprobe_index;
82 struct prev_kprobe prev_kprobe[ARCH_PREV_KPROBE_SZ];
Ananth N Mavinakayanahalli8a5c4dc2005-11-07 01:00:09 -080083};
84
Anil S Keshavamurthyfd7b2312005-06-23 00:09:28 -070085#define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)pentry
86
Rusty Lynch9508dbf2005-06-27 15:17:12 -070087#define ARCH_SUPPORTS_KRETPROBES
Anil S Keshavamurthye6f47f92006-06-26 00:25:29 -070088#define ARCH_INACTIVE_KPROBE_COUNT 1
Rusty Lynch9508dbf2005-06-27 15:17:12 -070089
Anil S Keshavamurthycd2675b2005-06-23 00:09:29 -070090#define SLOT0_OPCODE_SHIFT (37)
91#define SLOT1_p1_OPCODE_SHIFT (37 - (64-46))
92#define SLOT2_OPCODE_SHIFT (37)
93
94#define INDIRECT_CALL_OPCODE (1)
95#define IP_RELATIVE_CALL_OPCODE (5)
96#define IP_RELATIVE_BRANCH_OPCODE (4)
97#define IP_RELATIVE_PREDICT_OPCODE (7)
98#define LONG_BRANCH_OPCODE (0xC)
99#define LONG_CALL_OPCODE (0xD)
bibo mao214ddde2006-09-26 11:20:37 -0700100#define flush_insn_slot(p) do { } while (0)
Anil S Keshavamurthycd2675b2005-06-23 00:09:29 -0700101
Anil S Keshavamurthyfd7b2312005-06-23 00:09:28 -0700102typedef struct kprobe_opcode {
103 bundle_t bundle;
104} kprobe_opcode_t;
105
106struct fnptr {
107 unsigned long ip;
108 unsigned long gp;
109};
110
111/* Architecture specific copy of original instruction*/
112struct arch_specific_insn {
Anil S Keshavamurthycd2675b2005-06-23 00:09:29 -0700113 /* copy of the instruction to be emulated */
bibo mao214ddde2006-09-26 11:20:37 -0700114 kprobe_opcode_t *insn;
Anil S Keshavamurthycd2675b2005-06-23 00:09:29 -0700115 #define INST_FLAG_FIX_RELATIVE_IP_ADDR 1
116 #define INST_FLAG_FIX_BRANCH_REG 2
Keshavamurthy Anil Sdeac66a2005-09-06 15:19:35 -0700117 #define INST_FLAG_BREAK_INST 4
Anil S Keshavamurthycd2675b2005-06-23 00:09:29 -0700118 unsigned long inst_flag;
119 unsigned short target_br_reg;
Tony Luck08ed38b2006-11-14 09:33:38 -0800120 unsigned short slot;
Anil S Keshavamurthyfd7b2312005-06-23 00:09:28 -0700121};
122
Christoph Hellwig576fe0b2007-05-16 14:52:19 +0200123extern int kprobes_fault_handler(struct pt_regs *regs, int trapnr);
Anil S Keshavamurthyfd7b2312005-06-23 00:09:28 -0700124extern int kprobe_exceptions_notify(struct notifier_block *self,
125 unsigned long val, void *data);
Rusty Lynch9508dbf2005-06-27 15:17:12 -0700126
127/* ia64 does not need this */
128static inline void jprobe_return(void)
129{
130}
Zhang Yanmind3ef1f52006-01-13 14:45:21 -0800131extern void invalidate_stacked_regs(void);
132extern void flush_register_stack(void);
bibo mao214ddde2006-09-26 11:20:37 -0700133extern void arch_remove_kprobe(struct kprobe *p);
Rusty Lynch9508dbf2005-06-27 15:17:12 -0700134
Anil S Keshavamurthyfd7b2312005-06-23 00:09:28 -0700135#endif /* _ASM_KPROBES_H */