[PATCH] pktcdvd: Correctly set cmd_len field in pkt_generic_packet
[linux-2.6/mini2440.git] / include / asm-powerpc / kprobes.h
blob3a5dd492588fed5560206c2e850825e79ce3ab64
1 #ifndef _ASM_POWERPC_KPROBES_H
2 #define _ASM_POWERPC_KPROBES_H
3 #ifdef __KERNEL__
4 /*
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
25 * Rusty Russell).
26 * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli
27 * <ananth@in.ibm.com>
29 #include <linux/types.h>
30 #include <linux/ptrace.h>
31 #include <linux/percpu.h>
33 #define __ARCH_WANT_KPROBES_INSN_SLOT
35 struct pt_regs;
36 struct kprobe;
38 typedef unsigned int kprobe_opcode_t;
39 #define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */
40 #define MAX_INSN_SIZE 1
42 #define IS_TW(instr) (((instr) & 0xfc0007fe) == 0x7c000008)
43 #define IS_TD(instr) (((instr) & 0xfc0007fe) == 0x7c000088)
44 #define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000)
45 #define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000)
47 #ifdef CONFIG_PPC64
49 * 64bit powerpc uses function descriptors.
50 * Handle cases where:
51 * - User passes a <.symbol> or <module:.symbol>
52 * - User passes a <symbol> or <module:symbol>
53 * - User passes a non-existant symbol, kallsyms_lookup_name
54 * returns 0. Don't deref the NULL pointer in that case
56 #define kprobe_lookup_name(name, addr) \
57 { \
58 addr = (kprobe_opcode_t *)kallsyms_lookup_name(name); \
59 if (addr) { \
60 char *colon; \
61 if ((colon = strchr(name, ':')) != NULL) { \
62 colon++; \
63 if (*colon != '\0' && *colon != '.') \
64 addr = *(kprobe_opcode_t **)addr; \
65 } else if (name[0] != '.') \
66 addr = *(kprobe_opcode_t **)addr; \
67 } \
70 #define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)((func_descr_t *)pentry)
71 #define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \
72 IS_TWI(instr) || IS_TDI(instr))
73 #else
74 /* Use stock kprobe_lookup_name since ppc32 doesn't use function descriptors */
75 #define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)(pentry)
76 #define is_trap(instr) (IS_TW(instr) || IS_TWI(instr))
77 #endif
79 #define ARCH_SUPPORTS_KRETPROBES
80 #define ARCH_INACTIVE_KPROBE_COUNT 1
81 #define flush_insn_slot(p) do { } while (0)
83 void kretprobe_trampoline(void);
84 extern void arch_remove_kprobe(struct kprobe *p);
86 /* Architecture specific copy of original instruction */
87 struct arch_specific_insn {
88 /* copy of original instruction */
89 kprobe_opcode_t *insn;
92 struct prev_kprobe {
93 struct kprobe *kp;
94 unsigned long status;
95 unsigned long saved_msr;
98 /* per-cpu kprobe control block */
99 struct kprobe_ctlblk {
100 unsigned long kprobe_status;
101 unsigned long kprobe_saved_msr;
102 struct pt_regs jprobe_saved_regs;
103 struct prev_kprobe prev_kprobe;
106 extern int kprobe_exceptions_notify(struct notifier_block *self,
107 unsigned long val, void *data);
108 #endif /* __KERNEL__ */
109 #endif /* _ASM_POWERPC_KPROBES_H */