tools/perf/arch/common.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <limits.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <unistd.h>
   7 #include "common.h"
   8 #include "../util/env.h"
   9 #include "../util/debug.h"
  10 #include <linux/zalloc.h>
  11
  12 const char *const arc_triplets[] = {
  13         "arc-linux-",
  14         "arc-snps-linux-uclibc-",
  15         "arc-snps-linux-gnu-",
  16         NULL
  17 };
  18
  19 const char *const arm_triplets[] = {
  20         "arm-eabi-",
  21         "arm-linux-androideabi-",
  22         "arm-unknown-linux-",
  23         "arm-unknown-linux-gnu-",
  24         "arm-unknown-linux-gnueabi-",
  25         "arm-linux-gnu-",
  26         "arm-linux-gnueabihf-",
  27         "arm-none-eabi-",
  28         NULL
  29 };
  30
  31 const char *const arm64_triplets[] = {
  32         "aarch64-linux-android-",
  33         "aarch64-linux-gnu-",
  34         NULL
  35 };
  36
  37 const char *const powerpc_triplets[] = {
  38         "powerpc-unknown-linux-gnu-",
  39         "powerpc-linux-gnu-",
  40         "powerpc64-unknown-linux-gnu-",
  41         "powerpc64-linux-gnu-",
  42         "powerpc64le-linux-gnu-",
  43         NULL
  44 };
  45
  46 const char *const riscv32_triplets[] = {
  47         "riscv32-unknown-linux-gnu-",
  48         "riscv32-linux-android-",
  49         "riscv32-linux-gnu-",
  50         NULL
  51 };
  52
  53 const char *const riscv64_triplets[] = {
  54         "riscv64-unknown-linux-gnu-",
  55         "riscv64-linux-android-",
  56         "riscv64-linux-gnu-",
  57         NULL
  58 };
  59
  60 const char *const s390_triplets[] = {
  61         "s390-ibm-linux-",
  62         "s390x-linux-gnu-",
  63         NULL
  64 };
  65
  66 const char *const sh_triplets[] = {
  67         "sh-unknown-linux-gnu-",
  68         "sh-linux-gnu-",
  69         NULL
  70 };
  71
  72 const char *const sparc_triplets[] = {
  73         "sparc-unknown-linux-gnu-",
  74         "sparc64-unknown-linux-gnu-",
  75         "sparc64-linux-gnu-",
  76         NULL
  77 };
  78
  79 const char *const x86_triplets[] = {
  80         "x86_64-pc-linux-gnu-",
  81         "x86_64-unknown-linux-gnu-",
  82         "i686-pc-linux-gnu-",
  83         "i586-pc-linux-gnu-",
  84         "i486-pc-linux-gnu-",
  85         "i386-pc-linux-gnu-",
  86         "i686-linux-android-",
  87         "i686-android-linux-",
  88         "x86_64-linux-gnu-",
  89         "i586-linux-gnu-",
  90         NULL
  91 };
  92
  93 const char *const mips_triplets[] = {
  94         "mips-unknown-linux-gnu-",
  95         "mipsel-linux-android-",
  96         "mips-linux-gnu-",
  97         "mips64-linux-gnu-",
  98         "mips64el-linux-gnuabi64-",
  99         "mips64-linux-gnuabi64-",
 100         "mipsel-linux-gnu-",
 101         NULL
 102 };
 103
 104 static bool lookup_path(char *name)
 105 {
 106         bool found = false;
 107         char *path, *tmp = NULL;
 108         char buf[PATH_MAX];
 109         char *env = getenv("PATH");
 110
 111         if (!env)
 112                 return false;
 113
 114         env = strdup(env);
 115         if (!env)
 116                 return false;
 117
 118         path = strtok_r(env, ":", &tmp);
 119         while (path) {
 120                 scnprintf(buf, sizeof(buf), "%s/%s", path, name);
 121                 if (access(buf, F_OK) == 0) {
 122                         found = true;
 123                         break;
 124                 }
 125                 path = strtok_r(NULL, ":", &tmp);
 126         }
 127         free(env);
 128         return found;
 129 }
 130
 131 static int lookup_triplets(const char *const *triplets, const char *name)
 132 {
 133         int i;
 134         char buf[PATH_MAX];
 135
 136         for (i = 0; triplets[i] != NULL; i++) {
 137                 scnprintf(buf, sizeof(buf), "%s%s", triplets[i], name);
 138                 if (lookup_path(buf))
 139                         return i;
 140         }
 141         return -1;
 142 }
 143
 144 static int perf_env__lookup_binutils_path(struct perf_env *env,
 145                                           const char *name, char **path)
 146 {
 147         int idx;
 148         const char *arch = perf_env__arch(env), *cross_env;
 149         const char *const *path_list;
 150         char *buf = NULL;
 151
 152         /*
 153          * We don't need to try to find objdump path for native system.
 154          * Just use default binutils path (e.g.: "objdump").
 155          */
 156         if (!strcmp(perf_env__arch(NULL), arch))
 157                 goto out;
 158
 159         cross_env = getenv("CROSS_COMPILE");
 160         if (cross_env) {
 161                 if (asprintf(&buf, "%s%s", cross_env, name) < 0)
 162                         goto out_error;
 163                 if (buf[0] == '/') {
 164                         if (access(buf, F_OK) == 0)
 165                                 goto out;
 166                         goto out_error;
 167                 }
 168                 if (lookup_path(buf))
 169                         goto out;
 170                 zfree(&buf);
 171         }
 172
 173         if (!strcmp(arch, "arc"))
 174                 path_list = arc_triplets;
 175         else if (!strcmp(arch, "arm"))
 176                 path_list = arm_triplets;
 177         else if (!strcmp(arch, "arm64"))
 178                 path_list = arm64_triplets;
 179         else if (!strcmp(arch, "powerpc"))
 180                 path_list = powerpc_triplets;
 181         else if (!strcmp(arch, "riscv32"))
 182                 path_list = riscv32_triplets;
 183         else if (!strcmp(arch, "riscv64"))
 184                 path_list = riscv64_triplets;
 185         else if (!strcmp(arch, "sh"))
 186                 path_list = sh_triplets;
 187         else if (!strcmp(arch, "s390"))
 188                 path_list = s390_triplets;
 189         else if (!strcmp(arch, "sparc"))
 190                 path_list = sparc_triplets;
 191         else if (!strcmp(arch, "x86"))
 192                 path_list = x86_triplets;
 193         else if (!strcmp(arch, "mips"))
 194                 path_list = mips_triplets;
 195         else {
 196                 ui__error("binutils for %s not supported.\n", arch);
 197                 goto out_error;
 198         }
 199
 200         idx = lookup_triplets(path_list, name);
 201         if (idx < 0) {
 202                 ui__error("Please install %s for %s.\n"
 203                           "You can add it to PATH, set CROSS_COMPILE or "
 204                           "override the default using --%s.\n",
 205                           name, arch, name);
 206                 goto out_error;
 207         }
 208
 209         if (asprintf(&buf, "%s%s", path_list[idx], name) < 0)
 210                 goto out_error;
 211
 212 out:
 213         *path = buf;
 214         return 0;
 215 out_error:
 216         free(buf);
 217         *path = NULL;
 218         return -1;
 219 }
 220
 221 int perf_env__lookup_objdump(struct perf_env *env, char **path)
 222 {
 223         /*
 224          * For live mode, env->arch will be NULL and we can use
 225          * the native objdump tool.
 226          */
 227         if (env->arch == NULL)
 228                 return 0;
 229
 230         return perf_env__lookup_binutils_path(env, "objdump", path);
 231 }
 232
 233 /*
 234  * Some architectures have a single address space for kernel and user addresses,
 235  * which makes it possible to determine if an address is in kernel space or user
 236  * space.
 237  */
 238 bool perf_env__single_address_space(struct perf_env *env)
 239 {
 240         return strcmp(perf_env__arch(env), "sparc");
 241 }