4 * Kernel Probes (KProbes)
5 * include/asm-ia64/kprobes.h
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.
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.
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.
21 * Copyright (C) IBM Corporation, 2002, 2004
22 * Copyright (C) Intel Corporation, 2005
24 * 2005-Apr Rusty Lynch <rusty.lynch@intel.com> and Anil S Keshavamurthy
25 * <anil.s.keshavamurthy@intel.com> adapted from i386
27 #include <linux/types.h>
28 #include <linux/ptrace.h>
29 #include <linux/percpu.h>
30 #include <asm/break.h>
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 */
40 typedef union cmp_inst {
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;
59 typedef struct _bundle {
61 unsigned long long template : 5;
62 unsigned long long slot0 : 41;
63 unsigned long long slot1_p0 : 64-46;
66 unsigned long long slot1_p1 : 41 - (64-46);
67 unsigned long long slot2 : 41;
69 } __attribute__((__aligned__(16))) bundle_t;
76 #define MAX_PARAM_RSE_SIZE (0x60+0x60/0x3f)
77 /* per-cpu kprobe control block */
78 #define ARCH_PREV_KPROBE_SZ 2
79 struct 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];
85 atomic_t prev_kprobe_index;
86 struct prev_kprobe prev_kprobe[ARCH_PREV_KPROBE_SZ];
89 #define kretprobe_blacklist_size 0
91 #define SLOT0_OPCODE_SHIFT (37)
92 #define SLOT1_p1_OPCODE_SHIFT (37 - (64-46))
93 #define SLOT2_OPCODE_SHIFT (37)
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)
103 typedef struct kprobe_opcode {
112 /* Architecture specific copy of original instruction*/
113 struct 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;
125 extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
126 extern int kprobe_exceptions_notify(struct notifier_block *self,
127 unsigned long val, void *data);
129 extern void invalidate_stacked_regs(void);
130 extern void flush_register_stack(void);
131 extern void arch_remove_kprobe(struct kprobe *p);
133 #endif /* _ASM_KPROBES_H */