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
  28 typedef 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
  36 struct uprobe_xol_ops;
  37
  38 struct 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
  63 struct 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 */