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 static const struct sample_reg sample_reg_masks[] = {
  25         SMPL_REG_END
  26 };
  27
  28 const struct sample_reg * __weak arch__sample_reg_masks(void)
  29 {
  30         return sample_reg_masks;
  31 }
  32
  33 const char *perf_reg_name(int id, const char *arch)
  34 {
  35         const char *reg_name = NULL;
  36
  37         if (!strcmp(arch, "csky"))
  38                 reg_name = __perf_reg_name_csky(id);
  39         else if (!strcmp(arch, "loongarch"))
  40                 reg_name = __perf_reg_name_loongarch(id);
  41         else if (!strcmp(arch, "mips"))
  42                 reg_name = __perf_reg_name_mips(id);
  43         else if (!strcmp(arch, "powerpc"))
  44                 reg_name = __perf_reg_name_powerpc(id);
  45         else if (!strcmp(arch, "riscv"))
  46                 reg_name = __perf_reg_name_riscv(id);
  47         else if (!strcmp(arch, "s390"))
  48                 reg_name = __perf_reg_name_s390(id);
  49         else if (!strcmp(arch, "x86"))
  50                 reg_name = __perf_reg_name_x86(id);
  51         else if (!strcmp(arch, "arm"))
  52                 reg_name = __perf_reg_name_arm(id);
  53         else if (!strcmp(arch, "arm64"))
  54                 reg_name = __perf_reg_name_arm64(id);
  55
  56         return reg_name ?: "unknown";
  57 }
  58
  59 int perf_reg_value(u64 *valp, struct regs_dump *regs, int id)
  60 {
  61         int i, idx = 0;
  62         u64 mask = regs->mask;
  63
  64         if ((u64)id >= PERF_SAMPLE_REGS_CACHE_SIZE)
  65                 return -EINVAL;
  66
  67         if (regs->cache_mask & (1ULL << id))
  68                 goto out;
  69
  70         if (!(mask & (1ULL << id)))
  71                 return -EINVAL;
  72
  73         for (i = 0; i < id; i++) {
  74                 if (mask & (1ULL << i))
  75                         idx++;
  76         }
  77
  78         regs->cache_mask |= (1ULL << id);
  79         regs->cache_regs[id] = regs->regs[idx];
  80
  81 out:
  82         *valp = regs->cache_regs[id];
  83         return 0;
  84 }
  85
  86 uint64_t perf_arch_reg_ip(const char *arch)
  87 {
  88         if (!strcmp(arch, "arm"))
  89                 return __perf_reg_ip_arm();
  90         else if (!strcmp(arch, "arm64"))
  91                 return __perf_reg_ip_arm64();
  92         else if (!strcmp(arch, "csky"))
  93                 return __perf_reg_ip_csky();
  94         else if (!strcmp(arch, "loongarch"))
  95                 return __perf_reg_ip_loongarch();
  96         else if (!strcmp(arch, "mips"))
  97                 return __perf_reg_ip_mips();
  98         else if (!strcmp(arch, "powerpc"))
  99                 return __perf_reg_ip_powerpc();
 100         else if (!strcmp(arch, "riscv"))
 101                 return __perf_reg_ip_riscv();
 102         else if (!strcmp(arch, "s390"))
 103                 return __perf_reg_ip_s390();
 104         else if (!strcmp(arch, "x86"))
 105                 return __perf_reg_ip_x86();
 106
 107         pr_err("Fail to find IP register for arch %s, returns 0\n", arch);
 108         return 0;
 109 }
 110
 111 uint64_t perf_arch_reg_sp(const char *arch)
 112 {
 113         if (!strcmp(arch, "arm"))
 114                 return __perf_reg_sp_arm();
 115         else if (!strcmp(arch, "arm64"))
 116                 return __perf_reg_sp_arm64();
 117         else if (!strcmp(arch, "csky"))
 118                 return __perf_reg_sp_csky();
 119         else if (!strcmp(arch, "loongarch"))
 120                 return __perf_reg_sp_loongarch();
 121         else if (!strcmp(arch, "mips"))
 122                 return __perf_reg_sp_mips();
 123         else if (!strcmp(arch, "powerpc"))
 124                 return __perf_reg_sp_powerpc();
 125         else if (!strcmp(arch, "riscv"))
 126                 return __perf_reg_sp_riscv();
 127         else if (!strcmp(arch, "s390"))
 128                 return __perf_reg_sp_s390();
 129         else if (!strcmp(arch, "x86"))
 130                 return __perf_reg_sp_x86();
 131
 132         pr_err("Fail to find SP register for arch %s, returns 0\n", arch);
 133         return 0;
 134 }