root/include/linux/perf_regs.h

INCLUDED FROM

DEFINITIONS

1. perf_reg_value
2. perf_reg_validate
3. perf_reg_abi
4. perf_get_regs_user

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