LXR linux/tools/perf/util/perf

   1// SPDX-License-Identifier: GPL-2.0
   2#include <errno.h>
   3#include "perf_regs.h"
   4#include "event.h"
   5
   6int __weak arch_sdt_arg_parse_op(char *old_op __maybe_unused,
   7                                 char **new_op __maybe_unused)
   8{
   9        return SDT_ARG_SKIP;
  10}
  11
  12uint64_t __weak arch__intr_reg_mask(void)
  13{
  14        return PERF_REGS_MASK;
  15}
  16
  17uint64_t __weak arch__user_reg_mask(void)
  18{
  19        return PERF_REGS_MASK;
  20}
  21
  22#ifdef HAVE_PERF_REGS_SUPPORT
  23int perf_reg_value(u64 *valp, struct regs_dump *regs, int id)
  24{
  25        int i, idx = 0;
  26        u64 mask = regs->mask;
  27
  28        if (regs->cache_mask & (1ULL << id))
  29                goto out;
  30
  31        if (!(mask & (1ULL << id)))
  32                return -EINVAL;
  33
  34        for (i = 0; i < id; i++) {
  35                if (mask & (1ULL << i))
  36                        idx++;
  37        }
  38
  39        regs->cache_mask |= (1ULL << id);
  40        regs->cache_regs[id] = regs->regs[idx];
  41
  42out:
  43        *valp = regs->cache_regs[id];
  44        return 0;
  45}
  46#endif
  47