1 #ifndef _ASM_POWERPC_KPROBES_H
2 #define _ASM_POWERPC_KPROBES_H
5 * Kernel Probes (KProbes)
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
23 * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
24 * Probes initial implementation ( includes suggestions from
26 * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli
29 #include <linux/types.h>
30 #include <linux/ptrace.h>
31 #include <linux/percpu.h>
35 typedef unsigned int kprobe_opcode_t;
36 #define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */
37 #define MAX_INSN_SIZE 1
39 #define IS_TW(instr) (((instr) & 0xfc0007fe) == 0x7c000008)
40 #define IS_TD(instr) (((instr) & 0xfc0007fe) == 0x7c000088)
41 #define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000)
42 #define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000)
44 #define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)((func_descr_t *)pentry)
46 #define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \
47 IS_TWI(instr) || IS_TDI(instr))
49 #define ARCH_SUPPORTS_KRETPROBES
50 void kretprobe_trampoline(void);
52 /* Architecture specific copy of original instruction */
53 struct arch_specific_insn {
54 /* copy of original instruction */
55 kprobe_opcode_t *insn;
61 unsigned long saved_msr;
64 /* per-cpu kprobe control block */
65 struct kprobe_ctlblk {
66 unsigned long kprobe_status;
67 unsigned long kprobe_saved_msr;
68 struct pt_regs jprobe_saved_regs;
69 struct prev_kprobe prev_kprobe;
73 extern int kprobe_exceptions_notify(struct notifier_block *self,
74 unsigned long val, void *data);
75 #else /* !CONFIG_KPROBES */
76 static inline int kprobe_exceptions_notify(struct notifier_block *self,
77 unsigned long val, void *data)
82 #endif /* __KERNEL__ */
83 #endif /* _ASM_POWERPC_KPROBES_H */