arch/sparc/include/asm/uprobes.h

   1 #ifndef _ASM_UPROBES_H
   2 #define _ASM_UPROBES_H
   3 /*
   4  * User-space Probes (UProbes) for sparc
   5  *
   6  * Copyright (C) 2013 Oracle, Inc.
   7  *
   8  * This program is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation, either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  *
  21  * Authors:
  22  *     Jose E. Marchesi <jose.marchesi@oracle.com>
  23  *      Eric Saint Etienne <eric.saint.etienne@oracle.com>
  24  */
  25
  26 typedef u32 uprobe_opcode_t;
  27
  28 #define MAX_UINSN_BYTES         4
  29 #define UPROBE_XOL_SLOT_BYTES   (MAX_UINSN_BYTES * 2)
  30
  31 #define UPROBE_SWBP_INSN_SIZE   4
  32 #define UPROBE_SWBP_INSN        0x91d02073 /* ta 0x73 */
  33 #define UPROBE_STP_INSN         0x91d02074 /* ta 0x74 */
  34
  35 #define ANNUL_BIT (1 << 29)
  36
  37 struct arch_uprobe {
  38         union {
  39                 u8  insn[MAX_UINSN_BYTES];
  40                 u32 ixol;
  41         };
  42 };
  43
  44 struct arch_uprobe_task {
  45         u64 saved_tpc;
  46         u64 saved_tnpc;
  47 };
  48
  49 struct task_struct;
  50 struct notifier_block;
  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
  59 #endif  /* _ASM_UPROBES_H */