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 1
34 #define BREAK_INST (long)(__IA64_BREAK_KPROBE << 6)
36 typedef union cmp_inst {
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;
55 typedef struct _bundle {
57 unsigned long long template : 5;
58 unsigned long long slot0 : 41;
59 unsigned long long slot1_p0 : 64-46;
62 unsigned long long slot1_p1 : 41 - (64-46);
63 unsigned long long slot2 : 41;
65 } __attribute__((__aligned__(16))) bundle_t;
72 #define MAX_PARAM_RSE_SIZE (0x60+0x60/0x3f)
73 /* per-cpu kprobe control block */
74 struct kprobe_ctlblk {
75 unsigned long kprobe_status;
76 struct pt_regs jprobe_saved_regs;
77 unsigned long jprobes_saved_stacked_regs[MAX_PARAM_RSE_SIZE];
80 struct prev_kprobe prev_kprobe;
83 #define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)pentry
85 #define ARCH_SUPPORTS_KRETPROBES
86 #define ARCH_INACTIVE_KPROBE_COUNT 1
88 #define SLOT0_OPCODE_SHIFT (37)
89 #define SLOT1_p1_OPCODE_SHIFT (37 - (64-46))
90 #define SLOT2_OPCODE_SHIFT (37)
92 #define INDIRECT_CALL_OPCODE (1)
93 #define IP_RELATIVE_CALL_OPCODE (5)
94 #define IP_RELATIVE_BRANCH_OPCODE (4)
95 #define IP_RELATIVE_PREDICT_OPCODE (7)
96 #define LONG_BRANCH_OPCODE (0xC)
97 #define LONG_CALL_OPCODE (0xD)
98 #define flush_insn_slot(p) do { } while (0)
100 typedef struct kprobe_opcode {
109 /* Architecture specific copy of original instruction*/
110 struct arch_specific_insn {
111 /* copy of the instruction to be emulated */
112 kprobe_opcode_t *insn;
113 #define INST_FLAG_FIX_RELATIVE_IP_ADDR 1
114 #define INST_FLAG_FIX_BRANCH_REG 2
115 #define INST_FLAG_BREAK_INST 4
116 unsigned long inst_flag;
117 unsigned short target_br_reg;
121 extern int kprobe_exceptions_notify(struct notifier_block *self,
122 unsigned long val, void *data);
124 /* ia64 does not need this */
125 static inline void jprobe_return(void)
128 extern void invalidate_stacked_regs(void);
129 extern void flush_register_stack(void);
130 extern void arch_remove_kprobe(struct kprobe *p);
132 #endif /* _ASM_KPROBES_H */