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1 | #ifndef _ASM_S390_KPROBES_H |
2 | #define _ASM_S390_KPROBES_H | |
3 | /* | |
4 | * Kernel Probes (KProbes) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | * | |
20 | * Copyright (C) IBM Corporation, 2002, 2006 | |
21 | * | |
22 | * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel | |
23 | * Probes initial implementation ( includes suggestions from | |
24 | * Rusty Russell). | |
25 | * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli | |
26 | * <ananth@in.ibm.com> | |
27 | * 2005-Dec Used as a template for s390 by Mike Grundy | |
28 | * <grundym@us.ibm.com> | |
29 | */ | |
30 | #include <linux/types.h> | |
31 | #include <linux/ptrace.h> | |
32 | #include <linux/percpu.h> | |
33 | ||
34 | #define __ARCH_WANT_KPROBES_INSN_SLOT | |
35 | struct pt_regs; | |
36 | struct kprobe; | |
37 | ||
38 | typedef u16 kprobe_opcode_t; | |
39 | #define BREAKPOINT_INSTRUCTION 0x0002 | |
40 | ||
41 | /* Maximum instruction size is 3 (16bit) halfwords: */ | |
42 | #define MAX_INSN_SIZE 0x0003 | |
43 | #define MAX_STACK_SIZE 64 | |
44 | #define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \ | |
45 | (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \ | |
46 | ? (MAX_STACK_SIZE) \ | |
47 | : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) | |
48 | ||
f438d914 | 49 | #define kretprobe_blacklist_size 0 |
4ba069b8 MG |
50 | |
51 | #define KPROBE_SWAP_INST 0x10 | |
52 | ||
53 | #define FIXUP_PSW_NORMAL 0x08 | |
54 | #define FIXUP_BRANCH_NOT_TAKEN 0x04 | |
55 | #define FIXUP_RETURN_REGISTER 0x02 | |
56 | #define FIXUP_NOT_REQUIRED 0x01 | |
57 | ||
58 | /* Architecture specific copy of original instruction */ | |
59 | struct arch_specific_insn { | |
60 | /* copy of original instruction */ | |
61 | kprobe_opcode_t *insn; | |
62 | int fixup; | |
63 | int ilen; | |
64 | int reg; | |
65 | }; | |
66 | ||
67 | struct ins_replace_args { | |
68 | kprobe_opcode_t *ptr; | |
69 | kprobe_opcode_t old; | |
70 | kprobe_opcode_t new; | |
71 | }; | |
72 | struct prev_kprobe { | |
73 | struct kprobe *kp; | |
74 | unsigned long status; | |
75 | unsigned long saved_psw; | |
76 | unsigned long kprobe_saved_imask; | |
77 | unsigned long kprobe_saved_ctl[3]; | |
78 | }; | |
79 | ||
80 | /* per-cpu kprobe control block */ | |
81 | struct kprobe_ctlblk { | |
82 | unsigned long kprobe_status; | |
83 | unsigned long kprobe_saved_imask; | |
84 | unsigned long kprobe_saved_ctl[3]; | |
85 | struct pt_regs jprobe_saved_regs; | |
86 | unsigned long jprobe_saved_r14; | |
87 | unsigned long jprobe_saved_r15; | |
88 | struct prev_kprobe prev_kprobe; | |
89 | kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE]; | |
90 | }; | |
91 | ||
92 | void arch_remove_kprobe(struct kprobe *p); | |
93 | void kretprobe_trampoline(void); | |
94 | int is_prohibited_opcode(kprobe_opcode_t *instruction); | |
95 | void get_instruction_type(struct arch_specific_insn *ainsn); | |
96 | ||
33464e3b CH |
97 | int kprobe_fault_handler(struct pt_regs *regs, int trapnr); |
98 | int kprobe_exceptions_notify(struct notifier_block *self, | |
99 | unsigned long val, void *data); | |
100 | ||
4ba069b8 MG |
101 | #define flush_insn_slot(p) do { } while (0) |
102 | ||
103 | #endif /* _ASM_S390_KPROBES_H */ |