1 #ifndef _ASM_POWERPC_KPROBES_H
2 #define _ASM_POWERPC_KPROBES_H
4 #include <asm-generic/kprobes.h>
8 * Kernel Probes (KProbes)
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 * Copyright (C) IBM Corporation, 2002, 2004
26 * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
27 * Probes initial implementation ( includes suggestions from
29 * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli
32 #include <linux/types.h>
33 #include <linux/ptrace.h>
34 #include <linux/percpu.h>
35 #include <linux/module.h>
36 #include <asm/probes.h>
37 #include <asm/code-patching.h>
40 #define __ARCH_WANT_KPROBES_INSN_SLOT
45 typedef ppc_opcode_t kprobe_opcode_t;
47 extern kprobe_opcode_t optinsn_slot;
49 /* Optinsn template address */
50 extern kprobe_opcode_t optprobe_template_entry[];
51 extern kprobe_opcode_t optprobe_template_op_address[];
52 extern kprobe_opcode_t optprobe_template_call_handler[];
53 extern kprobe_opcode_t optprobe_template_insn[];
54 extern kprobe_opcode_t optprobe_template_call_emulate[];
55 extern kprobe_opcode_t optprobe_template_ret[];
56 extern kprobe_opcode_t optprobe_template_end[];
58 /* Fixed instruction size for powerpc */
59 #define MAX_INSN_SIZE 1
60 #define MAX_OPTIMIZED_LENGTH sizeof(kprobe_opcode_t) /* 4 bytes */
61 #define MAX_OPTINSN_SIZE (optprobe_template_end - optprobe_template_entry)
62 #define RELATIVEJUMP_SIZE sizeof(kprobe_opcode_t) /* 4 bytes */
64 #define flush_insn_slot(p) do { } while (0)
65 #define kretprobe_blacklist_size 0
67 void kretprobe_trampoline(void);
68 extern void arch_remove_kprobe(struct kprobe *p);
70 /* Architecture specific copy of original instruction */
71 struct arch_specific_insn {
72 /* copy of original instruction */
73 kprobe_opcode_t *insn;
75 * Set in kprobes code, initially to 0. If the instruction can be
76 * eumulated, this is set to 1, if not, to -1.
84 unsigned long saved_msr;
87 /* per-cpu kprobe control block */
88 struct kprobe_ctlblk {
89 unsigned long kprobe_status;
90 unsigned long kprobe_saved_msr;
91 struct prev_kprobe prev_kprobe;
94 struct arch_optimized_insn {
95 kprobe_opcode_t copied_insn[1];
97 kprobe_opcode_t *insn;
100 extern int kprobe_exceptions_notify(struct notifier_block *self,
101 unsigned long val, void *data);
102 extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
103 extern int kprobe_handler(struct pt_regs *regs);
104 extern int kprobe_post_handler(struct pt_regs *regs);
106 static inline int kprobe_handler(struct pt_regs *regs) { return 0; }
107 static inline int kprobe_post_handler(struct pt_regs *regs) { return 0; }
108 #endif /* CONFIG_KPROBES */
109 #endif /* __KERNEL__ */
110 #endif /* _ASM_POWERPC_KPROBES_H */