LXR linux/arch/x86/include/asm/uprobes.h

   1#ifndef _ASM_UPROBES_H
   2#define _ASM_UPROBES_H
   3/*
   4 * User-space Probes (UProbes) for x86
   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, 2008-2011
  21 * Authors:
  22 *      Srikar Dronamraju
  23 *      Jim Keniston
  24 */
  25
  26#include <linux/notifier.h>
  27
  28typedef u8 uprobe_opcode_t;
  29
  30#define MAX_UINSN_BYTES                   16
  31#define UPROBE_XOL_SLOT_BYTES            128    /* to keep it cache aligned */
  32
  33#define UPROBE_SWBP_INSN                0xcc
  34#define UPROBE_SWBP_INSN_SIZE              1
  35
  36struct uprobe_xol_ops;
  37
  38struct arch_uprobe {
  39        union {
  40                u8                      insn[MAX_UINSN_BYTES];
  41                u8                      ixol[MAX_UINSN_BYTES];
  42        };
  43
  44        const struct uprobe_xol_ops     *ops;
  45
  46        union {
  47                struct {
  48                        s32     offs;
  49                        u8      ilen;
  50                        u8      opc1;
  51                }                       branch;
  52                struct {
  53                        u8      fixups;
  54                        u8      ilen;
  55                }                       defparam;
  56                struct {
  57                        u8      reg_offset;     /* to the start of pt_regs */
  58                        u8      ilen;
  59                }                       push;
  60        };
  61};
  62
  63struct arch_uprobe_task {
  64#ifdef CONFIG_X86_64
  65        unsigned long                   saved_scratch_register;
  66#endif
  67        unsigned int                    saved_trap_nr;
  68        unsigned int                    saved_tf;
  69};
  70
  71#endif  /* _ASM_UPROBES_H */
  72