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
  15 #ifndef PERF_REG_EXTENDED_MASK
  16 #define PERF_REG_EXTENDED_MASK  0
  17 #endif
  18
  19 u64 perf_reg_value(struct pt_regs *regs, int idx);
  20 int perf_reg_validate(u64 mask);
  21 u64 perf_reg_abi(struct task_struct *task);
  22 void perf_get_regs_user(struct perf_regs *regs_user,
  23                         struct pt_regs *regs);
  24 #else
  25
  26 #define PERF_REG_EXTENDED_MASK  0
  27
  28 static inline u64 perf_reg_value(struct pt_regs *regs, int idx)
  29 {
  30         return 0;
  31 }
  32
  33 static inline int perf_reg_validate(u64 mask)
  34 {
  35         return mask ? -ENOSYS : 0;
  36 }
  37
  38 static inline u64 perf_reg_abi(struct task_struct *task)
  39 {
  40         return PERF_SAMPLE_REGS_ABI_NONE;
  41 }
  42
  43 static inline void perf_get_regs_user(struct perf_regs *regs_user,
  44                                       struct pt_regs *regs)
  45 {
  46         regs_user->regs = task_pt_regs(current);
  47         regs_user->abi = perf_reg_abi(current);
  48 }
  49 #endif /* CONFIG_HAVE_PERF_REGS */
  50 #endif /* _LINUX_PERF_REGS_H */