fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-s390 / kprobes.h
blob948db3d0d05c194d4715706fe4c932a781d23e4e
1 #ifndef _ASM_S390_KPROBES_H
2 #define _ASM_S390_KPROBES_H
3 /*
4 * Kernel Probes (KProbes)
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.
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.
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.
20 * Copyright (C) IBM Corporation, 2002, 2006
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>
30 #include <linux/types.h>
31 #include <linux/ptrace.h>
32 #include <linux/percpu.h>
34 #define __ARCH_WANT_KPROBES_INSN_SLOT
35 struct pt_regs;
36 struct kprobe;
38 typedef u16 kprobe_opcode_t;
39 #define BREAKPOINT_INSTRUCTION 0x0002
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)))
49 #define ARCH_SUPPORTS_KRETPROBES
50 #define kretprobe_blacklist_size 0
52 #define KPROBE_SWAP_INST 0x10
54 #define FIXUP_PSW_NORMAL 0x08
55 #define FIXUP_BRANCH_NOT_TAKEN 0x04
56 #define FIXUP_RETURN_REGISTER 0x02
57 #define FIXUP_NOT_REQUIRED 0x01
59 /* Architecture specific copy of original instruction */
60 struct arch_specific_insn {
61 /* copy of original instruction */
62 kprobe_opcode_t *insn;
63 int fixup;
64 int ilen;
65 int reg;
68 struct ins_replace_args {
69 kprobe_opcode_t *ptr;
70 kprobe_opcode_t old;
71 kprobe_opcode_t new;
73 struct prev_kprobe {
74 struct kprobe *kp;
75 unsigned long status;
76 unsigned long saved_psw;
77 unsigned long kprobe_saved_imask;
78 unsigned long kprobe_saved_ctl[3];
81 /* per-cpu kprobe control block */
82 struct kprobe_ctlblk {
83 unsigned long kprobe_status;
84 unsigned long kprobe_saved_imask;
85 unsigned long kprobe_saved_ctl[3];
86 struct pt_regs jprobe_saved_regs;
87 unsigned long jprobe_saved_r14;
88 unsigned long jprobe_saved_r15;
89 struct prev_kprobe prev_kprobe;
90 kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
93 void arch_remove_kprobe(struct kprobe *p);
94 void kretprobe_trampoline(void);
95 int is_prohibited_opcode(kprobe_opcode_t *instruction);
96 void get_instruction_type(struct arch_specific_insn *ainsn);
98 int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
99 int kprobe_exceptions_notify(struct notifier_block *self,
100 unsigned long val, void *data);
102 #define flush_insn_slot(p) do { } while (0)
104 #endif /* _ASM_S390_KPROBES_H */