arch/sparc/include/asm/uprobes.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 #ifndef _ASM_UPROBES_H
   3 #define _ASM_UPROBES_H
   4 /*
   5  * User-space Probes (UProbes) for sparc
   6  *
   7  * Copyright (C) 2013 Oracle, Inc.
   8  *
   9  * Authors:
  10  *     Jose E. Marchesi <jose.marchesi@oracle.com>
  11  *      Eric Saint Etienne <eric.saint.etienne@oracle.com>
  12  */
  13
  14 typedef u32 uprobe_opcode_t;
  15
  16 #define MAX_UINSN_BYTES         4
  17 #define UPROBE_XOL_SLOT_BYTES   (MAX_UINSN_BYTES * 2)
  18
  19 #define UPROBE_SWBP_INSN_SIZE   4
  20 #define UPROBE_SWBP_INSN        0x91d02073 /* ta 0x73 */
  21 #define UPROBE_STP_INSN         0x91d02074 /* ta 0x74 */
  22
  23 #define ANNUL_BIT (1 << 29)
  24
  25 struct arch_uprobe {
  26         union {
  27                 u8  insn[MAX_UINSN_BYTES];
  28                 u32 ixol;
  29         };
  30 };
  31
  32 struct arch_uprobe_task {
  33         u64 saved_tpc;
  34         u64 saved_tnpc;
  35 };
  36
  37 struct task_struct;
  38 struct notifier_block;
  39
  40 extern int  arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr);
  41 extern int  arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs);
  42 extern int  arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs);
  43 extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk);
  44 extern int  arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data);
  45 extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs);
  46
  47 #endif  /* _ASM_UPROBES_H */