include/linux/perf_regs.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_PERF_REGS_H
   3 #define _LINUX_PERF_REGS_H
   4
   5 #include <linux/sched/task_stack.h>
   6
   7 struct perf_regs {
   8         __u64           abi;
   9         struct pt_regs  *regs;
  10 };
  11
  12 #ifdef CONFIG_HAVE_PERF_REGS
  13 #include <asm/perf_regs.h>
  14 u64 perf_reg_value(struct pt_regs *regs, int idx);
  15 int perf_reg_validate(u64 mask);
  16 u64 perf_reg_abi(struct task_struct *task);
  17 void perf_get_regs_user(struct perf_regs *regs_user,
  18                         struct pt_regs *regs,
  19                         struct pt_regs *regs_user_copy);
  20 #else
  21 static inline u64 perf_reg_value(struct pt_regs *regs, int idx)
  22 {
  23         return 0;
  24 }
  25
  26 static inline int perf_reg_validate(u64 mask)
  27 {
  28         return mask ? -ENOSYS : 0;
  29 }
  30
  31 static inline u64 perf_reg_abi(struct task_struct *task)
  32 {
  33         return PERF_SAMPLE_REGS_ABI_NONE;
  34 }
  35
  36 static inline void perf_get_regs_user(struct perf_regs *regs_user,
  37                                       struct pt_regs *regs,
  38                                       struct pt_regs *regs_user_copy)
  39 {
  40         regs_user->regs = task_pt_regs(current);
  41         regs_user->abi = perf_reg_abi(current);
  42 }
  43 #endif /* CONFIG_HAVE_PERF_REGS */
  44 #endif /* _LINUX_PERF_REGS_H */