arch/arm/kernel/perf_regs.c

   1
   2 #include <linux/errno.h>
   3 #include <linux/kernel.h>
   4 #include <linux/perf_event.h>
   5 #include <linux/bug.h>
   6 #include <asm/perf_regs.h>
   7 #include <asm/ptrace.h>
   8
   9 u64 perf_reg_value(struct pt_regs *regs, int idx)
  10 {
  11         if (WARN_ON_ONCE((u32)idx >= PERF_REG_ARM_MAX))
  12                 return 0;
  13
  14         return regs->uregs[idx];
  15 }
  16
  17 #define REG_RESERVED (~((1ULL << PERF_REG_ARM_MAX) - 1))
  18
  19 int perf_reg_validate(u64 mask)
  20 {
  21         if (!mask || mask & REG_RESERVED)
  22                 return -EINVAL;
  23
  24         return 0;
  25 }
  26
  27 u64 perf_reg_abi(struct task_struct *task)
  28 {
  29         return PERF_SAMPLE_REGS_ABI_32;
  30 }
  31
  32 void perf_get_regs_user(struct perf_regs *regs_user,
  33                         struct pt_regs *regs,
  34                         struct pt_regs *regs_user_copy)
  35 {
  36         regs_user->regs = task_pt_regs(current);
  37         regs_user->abi = perf_reg_abi(current);
  38 }