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 arch_uprobe {
  37         u16                             fixups;
  38         u8                              insn[MAX_UINSN_BYTES];
  39 #ifdef CONFIG_X86_64
  40         unsigned long                   rip_rela_target_address;
  41 #endif
  42 };
  43
  44 struct arch_uprobe_task {
  45 #ifdef CONFIG_X86_64
  46         unsigned long                   saved_scratch_register;
  47 #endif
  48         unsigned int                    saved_trap_nr;
  49         unsigned int                    saved_tf;
  50 };
  51
  52 extern int  arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr);
  53 extern int  arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs);
  54 extern int  arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs);
  55 extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk);
  56 extern int  arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data);
  57 extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs);
  58 #endif  /* _ASM_UPROBES_H */