LXR linux/arch/ia64/include/asm/kprobes.h

   1#ifndef _ASM_KPROBES_H
   2#define _ASM_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, 2004
  21 * Copyright (C) Intel Corporation, 2005
  22 *
  23 * 2005-Apr     Rusty Lynch <rusty.lynch@intel.com> and Anil S Keshavamurthy
  24 *              <anil.s.keshavamurthy@intel.com> adapted from i386
  25 */
  26#include <asm-generic/kprobes.h>
  27#include <asm/break.h>
  28
  29#define BREAK_INST      (long)(__IA64_BREAK_KPROBE << 6)
  30
  31#ifdef CONFIG_KPROBES
  32
  33#include <linux/types.h>
  34#include <linux/ptrace.h>
  35#include <linux/percpu.h>
  36
  37#define __ARCH_WANT_KPROBES_INSN_SLOT
  38#define MAX_INSN_SIZE   2       /* last half is for kprobe-booster */
  39#define NOP_M_INST      (long)(1<<27)
  40#define BRL_INST(i1, i2) ((long)((0xcL << 37) | /* brl */ \
  41                                (0x1L << 12) |  /* many */ \
  42                                (((i1) & 1) << 36) | ((i2) << 13))) /* imm */
  43
  44typedef union cmp_inst {
  45        struct {
  46        unsigned long long qp : 6;
  47        unsigned long long p1 : 6;
  48        unsigned long long c  : 1;
  49        unsigned long long r2 : 7;
  50        unsigned long long r3 : 7;
  51        unsigned long long p2 : 6;
  52        unsigned long long ta : 1;
  53        unsigned long long x2 : 2;
  54        unsigned long long tb : 1;
  55        unsigned long long opcode : 4;
  56        unsigned long long reserved : 23;
  57        }f;
  58        unsigned long long l;
  59} cmp_inst_t;
  60
  61struct kprobe;
  62
  63typedef struct _bundle {
  64        struct {
  65                unsigned long long template : 5;
  66                unsigned long long slot0 : 41;
  67                unsigned long long slot1_p0 : 64-46;
  68        } quad0;
  69        struct {
  70                unsigned long long slot1_p1 : 41 - (64-46);
  71                unsigned long long slot2 : 41;
  72        } quad1;
  73} __attribute__((__aligned__(16)))  bundle_t;
  74
  75struct prev_kprobe {
  76        struct kprobe *kp;
  77        unsigned long status;
  78};
  79
  80#define MAX_PARAM_RSE_SIZE      (0x60+0x60/0x3f)
  81/* per-cpu kprobe control block */
  82#define ARCH_PREV_KPROBE_SZ 2
  83struct kprobe_ctlblk {
  84        unsigned long kprobe_status;
  85        struct pt_regs jprobe_saved_regs;
  86        unsigned long jprobes_saved_stacked_regs[MAX_PARAM_RSE_SIZE];
  87        unsigned long *bsp;
  88        unsigned long cfm;
  89        atomic_t prev_kprobe_index;
  90        struct prev_kprobe prev_kprobe[ARCH_PREV_KPROBE_SZ];
  91};
  92
  93#define kretprobe_blacklist_size 0
  94
  95#define SLOT0_OPCODE_SHIFT      (37)
  96#define SLOT1_p1_OPCODE_SHIFT   (37 - (64-46))
  97#define SLOT2_OPCODE_SHIFT      (37)
  98
  99#define INDIRECT_CALL_OPCODE            (1)
 100#define IP_RELATIVE_CALL_OPCODE         (5)
 101#define IP_RELATIVE_BRANCH_OPCODE       (4)
 102#define IP_RELATIVE_PREDICT_OPCODE      (7)
 103#define LONG_BRANCH_OPCODE              (0xC)
 104#define LONG_CALL_OPCODE                (0xD)
 105#define flush_insn_slot(p)              do { } while (0)
 106
 107typedef struct kprobe_opcode {
 108        bundle_t bundle;
 109} kprobe_opcode_t;
 110
 111/* Architecture specific copy of original instruction*/
 112struct arch_specific_insn {
 113        /* copy of the instruction to be emulated */
 114        kprobe_opcode_t *insn;
 115 #define INST_FLAG_FIX_RELATIVE_IP_ADDR         1
 116 #define INST_FLAG_FIX_BRANCH_REG               2
 117 #define INST_FLAG_BREAK_INST                   4
 118 #define INST_FLAG_BOOSTABLE                    8
 119        unsigned long inst_flag;
 120        unsigned short target_br_reg;
 121        unsigned short slot;
 122};
 123
 124extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
 125extern int kprobe_exceptions_notify(struct notifier_block *self,
 126                                    unsigned long val, void *data);
 127
 128extern void invalidate_stacked_regs(void);
 129extern void flush_register_stack(void);
 130extern void arch_remove_kprobe(struct kprobe *p);
 131
 132#endif /* CONFIG_KPROBES */
 133#endif /* _ASM_KPROBES_H */
 134