tools/perf/arch/common.c

   1 #include <stdio.h>
   2 #include <sys/utsname.h>
   3 #include "common.h"
   4 #include "../util/debug.h"
   5
   6 const char *const arm_triplets[] = {
   7         "arm-eabi-",
   8         "arm-linux-androideabi-",
   9         "arm-unknown-linux-",
  10         "arm-unknown-linux-gnu-",
  11         "arm-unknown-linux-gnueabi-",
  12         NULL
  13 };
  14
  15 const char *const powerpc_triplets[] = {
  16         "powerpc-unknown-linux-gnu-",
  17         "powerpc64-unknown-linux-gnu-",
  18         NULL
  19 };
  20
  21 const char *const s390_triplets[] = {
  22         "s390-ibm-linux-",
  23         NULL
  24 };
  25
  26 const char *const sh_triplets[] = {
  27         "sh-unknown-linux-gnu-",
  28         "sh64-unknown-linux-gnu-",
  29         NULL
  30 };
  31
  32 const char *const sparc_triplets[] = {
  33         "sparc-unknown-linux-gnu-",
  34         "sparc64-unknown-linux-gnu-",
  35         NULL
  36 };
  37
  38 const char *const x86_triplets[] = {
  39         "x86_64-pc-linux-gnu-",
  40         "x86_64-unknown-linux-gnu-",
  41         "i686-pc-linux-gnu-",
  42         "i586-pc-linux-gnu-",
  43         "i486-pc-linux-gnu-",
  44         "i386-pc-linux-gnu-",
  45         "i686-linux-android-",
  46         "i686-android-linux-",
  47         NULL
  48 };
  49
  50 const char *const mips_triplets[] = {
  51         "mips-unknown-linux-gnu-",
  52         "mipsel-linux-android-",
  53         NULL
  54 };
  55
  56 static bool lookup_path(char *name)
  57 {
  58         bool found = false;
  59         char *path, *tmp;
  60         char buf[PATH_MAX];
  61         char *env = getenv("PATH");
  62
  63         if (!env)
  64                 return false;
  65
  66         env = strdup(env);
  67         if (!env)
  68                 return false;
  69
  70         path = strtok_r(env, ":", &tmp);
  71         while (path) {
  72                 scnprintf(buf, sizeof(buf), "%s/%s", path, name);
  73                 if (access(buf, F_OK) == 0) {
  74                         found = true;
  75                         break;
  76                 }
  77                 path = strtok_r(NULL, ":", &tmp);
  78         }
  79         free(env);
  80         return found;
  81 }
  82
  83 static int lookup_triplets(const char *const *triplets, const char *name)
  84 {
  85         int i;
  86         char buf[PATH_MAX];
  87
  88         for (i = 0; triplets[i] != NULL; i++) {
  89                 scnprintf(buf, sizeof(buf), "%s%s", triplets[i], name);
  90                 if (lookup_path(buf))
  91                         return i;
  92         }
  93         return -1;
  94 }
  95
  96 static int perf_session_env__lookup_binutils_path(struct perf_session_env *env,
  97                                                   const char *name,
  98                                                   const char **path)
  99 {
 100         int idx;
 101         char *arch, *cross_env;
 102         struct utsname uts;
 103         const char *const *path_list;
 104         char *buf = NULL;
 105
 106         if (uname(&uts) < 0)
 107                 goto out;
 108
 109         /*
 110          * We don't need to try to find objdump path for native system.
 111          * Just use default binutils path (e.g.: "objdump").
 112          */
 113         if (!strcmp(uts.machine, env->arch))
 114                 goto out;
 115
 116         cross_env = getenv("CROSS_COMPILE");
 117         if (cross_env) {
 118                 if (asprintf(&buf, "%s%s", cross_env, name) < 0)
 119                         goto out_error;
 120                 if (buf[0] == '/') {
 121                         if (access(buf, F_OK) == 0)
 122                                 goto out;
 123                         goto out_error;
 124                 }
 125                 if (lookup_path(buf))
 126                         goto out;
 127                 free(buf);
 128         }
 129
 130         arch = env->arch;
 131
 132         if (!strcmp(arch, "arm"))
 133                 path_list = arm_triplets;
 134         else if (!strcmp(arch, "powerpc"))
 135                 path_list = powerpc_triplets;
 136         else if (!strcmp(arch, "sh"))
 137                 path_list = sh_triplets;
 138         else if (!strcmp(arch, "s390"))
 139                 path_list = s390_triplets;
 140         else if (!strcmp(arch, "sparc"))
 141                 path_list = sparc_triplets;
 142         else if (!strcmp(arch, "x86") || !strcmp(arch, "i386") ||
 143                  !strcmp(arch, "i486") || !strcmp(arch, "i586") ||
 144                  !strcmp(arch, "i686"))
 145                 path_list = x86_triplets;
 146         else if (!strcmp(arch, "mips"))
 147                 path_list = mips_triplets;
 148         else {
 149                 ui__error("binutils for %s not supported.\n", arch);
 150                 goto out_error;
 151         }
 152
 153         idx = lookup_triplets(path_list, name);
 154         if (idx < 0) {
 155                 ui__error("Please install %s for %s.\n"
 156                           "You can add it to PATH, set CROSS_COMPILE or "
 157                           "override the default using --%s.\n",
 158                           name, arch, name);
 159                 goto out_error;
 160         }
 161
 162         if (asprintf(&buf, "%s%s", path_list[idx], name) < 0)
 163                 goto out_error;
 164
 165 out:
 166         *path = buf;
 167         return 0;
 168 out_error:
 169         free(buf);
 170         *path = NULL;
 171         return -1;
 172 }
 173
 174 int perf_session_env__lookup_objdump(struct perf_session_env *env)
 175 {
 176         return perf_session_env__lookup_binutils_path(env, "objdump",
 177                                                       &objdump_path);
 178 }