tools/perf/util/perf_regs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <errno.h>
   3 #include <string.h>
   4 #include "perf_regs.h"
   5 #include "util/sample.h"
   6 #include "debug.h"
   7
   8 int __weak arch_sdt_arg_parse_op(char *old_op __maybe_unused,
   9                                  char **new_op __maybe_unused)
  10 {
  11         return SDT_ARG_SKIP;
  12 }
  13
  14 uint64_t __weak arch__intr_reg_mask(void)
  15 {
  16         return 0;
  17 }
  18
  19 uint64_t __weak arch__user_reg_mask(void)
  20 {
  21         return 0;
  22 }
  23
  24 #ifdef HAVE_PERF_REGS_SUPPORT
  25
  26 const char *perf_reg_name(int id, const char *arch)
  27 {
  28         const char *reg_name = NULL;
  29
  30         if (!strcmp(arch, "csky"))
  31                 reg_name = __perf_reg_name_csky(id);
  32         else if (!strcmp(arch, "loongarch"))
  33                 reg_name = __perf_reg_name_loongarch(id);
  34         else if (!strcmp(arch, "mips"))
  35                 reg_name = __perf_reg_name_mips(id);
  36         else if (!strcmp(arch, "powerpc"))
  37                 reg_name = __perf_reg_name_powerpc(id);
  38         else if (!strcmp(arch, "riscv"))
  39                 reg_name = __perf_reg_name_riscv(id);
  40         else if (!strcmp(arch, "s390"))
  41                 reg_name = __perf_reg_name_s390(id);
  42         else if (!strcmp(arch, "x86"))
  43                 reg_name = __perf_reg_name_x86(id);
  44         else if (!strcmp(arch, "arm"))
  45                 reg_name = __perf_reg_name_arm(id);
  46         else if (!strcmp(arch, "arm64"))
  47                 reg_name = __perf_reg_name_arm64(id);
  48
  49         return reg_name ?: "unknown";
  50 }
  51
  52 int perf_reg_value(u64 *valp, struct regs_dump *regs, int id)
  53 {
  54         int i, idx = 0;
  55         u64 mask = regs->mask;
  56
  57         if ((u64)id >= PERF_SAMPLE_REGS_CACHE_SIZE)
  58                 return -EINVAL;
  59
  60         if (regs->cache_mask & (1ULL << id))
  61                 goto out;
  62
  63         if (!(mask & (1ULL << id)))
  64                 return -EINVAL;
  65
  66         for (i = 0; i < id; i++) {
  67                 if (mask & (1ULL << i))
  68                         idx++;
  69         }
  70
  71         regs->cache_mask |= (1ULL << id);
  72         regs->cache_regs[id] = regs->regs[idx];
  73
  74 out:
  75         *valp = regs->cache_regs[id];
  76         return 0;
  77 }
  78
  79 uint64_t perf_arch_reg_ip(const char *arch)
  80 {
  81         if (!strcmp(arch, "arm"))
  82                 return __perf_reg_ip_arm();
  83         else if (!strcmp(arch, "arm64"))
  84                 return __perf_reg_ip_arm64();
  85         else if (!strcmp(arch, "csky"))
  86                 return __perf_reg_ip_csky();
  87         else if (!strcmp(arch, "loongarch"))
  88                 return __perf_reg_ip_loongarch();
  89         else if (!strcmp(arch, "mips"))
  90                 return __perf_reg_ip_mips();
  91         else if (!strcmp(arch, "powerpc"))
  92                 return __perf_reg_ip_powerpc();
  93         else if (!strcmp(arch, "riscv"))
  94                 return __perf_reg_ip_riscv();
  95         else if (!strcmp(arch, "s390"))
  96                 return __perf_reg_ip_s390();
  97         else if (!strcmp(arch, "x86"))
  98                 return __perf_reg_ip_x86();
  99
 100         pr_err("Fail to find IP register for arch %s, returns 0\n", arch);
 101         return 0;
 102 }
 103
 104 uint64_t perf_arch_reg_sp(const char *arch)
 105 {
 106         if (!strcmp(arch, "arm"))
 107                 return __perf_reg_sp_arm();
 108         else if (!strcmp(arch, "arm64"))
 109                 return __perf_reg_sp_arm64();
 110         else if (!strcmp(arch, "csky"))
 111                 return __perf_reg_sp_csky();
 112         else if (!strcmp(arch, "loongarch"))
 113                 return __perf_reg_sp_loongarch();
 114         else if (!strcmp(arch, "mips"))
 115                 return __perf_reg_sp_mips();
 116         else if (!strcmp(arch, "powerpc"))
 117                 return __perf_reg_sp_powerpc();
 118         else if (!strcmp(arch, "riscv"))
 119                 return __perf_reg_sp_riscv();
 120         else if (!strcmp(arch, "s390"))
 121                 return __perf_reg_sp_s390();
 122         else if (!strcmp(arch, "x86"))
 123                 return __perf_reg_sp_x86();
 124
 125         pr_err("Fail to find SP register for arch %s, returns 0\n", arch);
 126         return 0;
 127 }
 128
 129 #endif