arch/powerpc/include/asm/uprobes.h

   1 #ifndef _ASM_UPROBES_H
   2 #define _ASM_UPROBES_H
   3 /*
   4  * User-space Probes (UProbes) for powerpc
   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 IBM Corporation, 2007-2012
  21  *
  22  * Adapted from the x86 port by Ananth N Mavinakayanahalli <ananth@in.ibm.com>
  23  */
  24
  25 #include <linux/notifier.h>
  26 #include <asm/probes.h>
  27
  28 typedef ppc_opcode_t uprobe_opcode_t;
  29
  30 #define MAX_UINSN_BYTES         4
  31 #define UPROBE_XOL_SLOT_BYTES   (MAX_UINSN_BYTES)
  32
  33 /* The following alias is needed for reference from arch-agnostic code */
  34 #define UPROBE_SWBP_INSN        BREAKPOINT_INSTRUCTION
  35 #define UPROBE_SWBP_INSN_SIZE   4 /* swbp insn size in bytes */
  36
  37 struct arch_uprobe {
  38         union {
  39                 u8      insn[MAX_UINSN_BYTES];
  40                 u32     ainsn;
  41         };
  42 };
  43
  44 struct arch_uprobe_task {
  45         unsigned long   saved_trap_nr;
  46 };
  47
  48 extern int  arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr);
  49 extern int  arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs);
  50 extern int  arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs);
  51 extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk);
  52 extern int  arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data);
  53 extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs);
  54 extern unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline_vaddr, struct pt_regs *regs);
  55 #endif  /* _ASM_UPROBES_H */