tools/perf/arch/common.c

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