tools/perf/arch/common.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <stdio.h>
   3 #include <sys/utsname.h>
   4 #include "common.h"
   5 #include "../util/util.h"
   6 #include "../util/debug.h"
   7
   8 #include "sane_ctype.h"
   9
  10 const char *const arm_triplets[] = {
  11         "arm-eabi-",
  12         "arm-linux-androideabi-",
  13         "arm-unknown-linux-",
  14         "arm-unknown-linux-gnu-",
  15         "arm-unknown-linux-gnueabi-",
  16         "arm-linux-gnu-",
  17         "arm-linux-gnueabihf-",
  18         "arm-none-eabi-",
  19         NULL
  20 };
  21
  22 const char *const arm64_triplets[] = {
  23         "aarch64-linux-android-",
  24         "aarch64-linux-gnu-",
  25         NULL
  26 };
  27
  28 const char *const powerpc_triplets[] = {
  29         "powerpc-unknown-linux-gnu-",
  30         "powerpc-linux-gnu-",
  31         "powerpc64-unknown-linux-gnu-",
  32         "powerpc64-linux-gnu-",
  33         "powerpc64le-linux-gnu-",
  34         NULL
  35 };
  36
  37 const char *const s390_triplets[] = {
  38         "s390-ibm-linux-",
  39         "s390x-linux-gnu-",
  40         NULL
  41 };
  42
  43 const char *const sh_triplets[] = {
  44         "sh-unknown-linux-gnu-",
  45         "sh64-unknown-linux-gnu-",
  46         "sh-linux-gnu-",
  47         "sh64-linux-gnu-",
  48         NULL
  49 };
  50
  51 const char *const sparc_triplets[] = {
  52         "sparc-unknown-linux-gnu-",
  53         "sparc64-unknown-linux-gnu-",
  54         "sparc64-linux-gnu-",
  55         NULL
  56 };
  57
  58 const char *const x86_triplets[] = {
  59         "x86_64-pc-linux-gnu-",
  60         "x86_64-unknown-linux-gnu-",
  61         "i686-pc-linux-gnu-",
  62         "i586-pc-linux-gnu-",
  63         "i486-pc-linux-gnu-",
  64         "i386-pc-linux-gnu-",
  65         "i686-linux-android-",
  66         "i686-android-linux-",
  67         "x86_64-linux-gnu-",
  68         "i586-linux-gnu-",
  69         NULL
  70 };
  71
  72 const char *const mips_triplets[] = {
  73         "mips-unknown-linux-gnu-",
  74         "mipsel-linux-android-",
  75         "mips-linux-gnu-",
  76         "mips64-linux-gnu-",
  77         "mips64el-linux-gnuabi64-",
  78         "mips64-linux-gnuabi64-",
  79         "mipsel-linux-gnu-",
  80         NULL
  81 };
  82
  83 static bool lookup_path(char *name)
  84 {
  85         bool found = false;
  86         char *path, *tmp = NULL;
  87         char buf[PATH_MAX];
  88         char *env = getenv("PATH");
  89
  90         if (!env)
  91                 return false;
  92
  93         env = strdup(env);
  94         if (!env)
  95                 return false;
  96
  97         path = strtok_r(env, ":", &tmp);
  98         while (path) {
  99                 scnprintf(buf, sizeof(buf), "%s/%s", path, name);
 100                 if (access(buf, F_OK) == 0) {
 101                         found = true;
 102                         break;
 103                 }
 104                 path = strtok_r(NULL, ":", &tmp);
 105         }
 106         free(env);
 107         return found;
 108 }
 109
 110 static int lookup_triplets(const char *const *triplets, const char *name)
 111 {
 112         int i;
 113         char buf[PATH_MAX];
 114
 115         for (i = 0; triplets[i] != NULL; i++) {
 116                 scnprintf(buf, sizeof(buf), "%s%s", triplets[i], name);
 117                 if (lookup_path(buf))
 118                         return i;
 119         }
 120         return -1;
 121 }
 122
 123 /*
 124  * Return architecture name in a normalized form.
 125  * The conversion logic comes from the Makefile.
 126  */
 127 const char *normalize_arch(char *arch)
 128 {
 129         if (!strcmp(arch, "x86_64"))
 130                 return "x86";
 131         if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
 132                 return "x86";
 133         if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
 134                 return "sparc";
 135         if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
 136                 return "arm64";
 137         if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
 138                 return "arm";
 139         if (!strncmp(arch, "s390", 4))
 140                 return "s390";
 141         if (!strncmp(arch, "parisc", 6))
 142                 return "parisc";
 143         if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
 144                 return "powerpc";
 145         if (!strncmp(arch, "mips", 4))
 146                 return "mips";
 147         if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
 148                 return "sh";
 149
 150         return arch;
 151 }
 152
 153 static int perf_env__lookup_binutils_path(struct perf_env *env,
 154                                           const char *name, const char **path)
 155 {
 156         int idx;
 157         const char *arch, *cross_env;
 158         struct utsname uts;
 159         const char *const *path_list;
 160         char *buf = NULL;
 161
 162         arch = normalize_arch(env->arch);
 163
 164         if (uname(&uts) < 0)
 165                 goto out;
 166
 167         /*
 168          * We don't need to try to find objdump path for native system.
 169          * Just use default binutils path (e.g.: "objdump").
 170          */
 171         if (!strcmp(normalize_arch(uts.machine), arch))
 172                 goto out;
 173
 174         cross_env = getenv("CROSS_COMPILE");
 175         if (cross_env) {
 176                 if (asprintf(&buf, "%s%s", cross_env, name) < 0)
 177                         goto out_error;
 178                 if (buf[0] == '/') {
 179                         if (access(buf, F_OK) == 0)
 180                                 goto out;
 181                         goto out_error;
 182                 }
 183                 if (lookup_path(buf))
 184                         goto out;
 185                 zfree(&buf);
 186         }
 187
 188         if (!strcmp(arch, "arm"))
 189                 path_list = arm_triplets;
 190         else if (!strcmp(arch, "arm64"))
 191                 path_list = arm64_triplets;
 192         else if (!strcmp(arch, "powerpc"))
 193                 path_list = powerpc_triplets;
 194         else if (!strcmp(arch, "sh"))
 195                 path_list = sh_triplets;
 196         else if (!strcmp(arch, "s390"))
 197                 path_list = s390_triplets;
 198         else if (!strcmp(arch, "sparc"))
 199                 path_list = sparc_triplets;
 200         else if (!strcmp(arch, "x86"))
 201                 path_list = x86_triplets;
 202         else if (!strcmp(arch, "mips"))
 203                 path_list = mips_triplets;
 204         else {
 205                 ui__error("binutils for %s not supported.\n", arch);
 206                 goto out_error;
 207         }
 208
 209         idx = lookup_triplets(path_list, name);
 210         if (idx < 0) {
 211                 ui__error("Please install %s for %s.\n"
 212                           "You can add it to PATH, set CROSS_COMPILE or "
 213                           "override the default using --%s.\n",
 214                           name, arch, name);
 215                 goto out_error;
 216         }
 217
 218         if (asprintf(&buf, "%s%s", path_list[idx], name) < 0)
 219                 goto out_error;
 220
 221 out:
 222         *path = buf;
 223         return 0;
 224 out_error:
 225         free(buf);
 226         *path = NULL;
 227         return -1;
 228 }
 229
 230 int perf_env__lookup_objdump(struct perf_env *env)
 231 {
 232         /*
 233          * For live mode, env->arch will be NULL and we can use
 234          * the native objdump tool.
 235          */
 236         if (env->arch == NULL)
 237                 return 0;
 238
 239         return perf_env__lookup_binutils_path(env, "objdump", &objdump_path);
 240 }