tools/perf/arch/common.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <stdio.h>
   3 #include "common.h"
   4 #include "../util/env.h"
   5 #include "../util/util.h"
   6 #include "../util/debug.h"
   7
   8 const char *const arm_triplets[] = {
   9         "arm-eabi-",
  10         "arm-linux-androideabi-",
  11         "arm-unknown-linux-",
  12         "arm-unknown-linux-gnu-",
  13         "arm-unknown-linux-gnueabi-",
  14         "arm-linux-gnu-",
  15         "arm-linux-gnueabihf-",
  16         "arm-none-eabi-",
  17         NULL
  18 };
  19
  20 const char *const arm64_triplets[] = {
  21         "aarch64-linux-android-",
  22         "aarch64-linux-gnu-",
  23         NULL
  24 };
  25
  26 const char *const powerpc_triplets[] = {
  27         "powerpc-unknown-linux-gnu-",
  28         "powerpc-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 static int perf_env__lookup_binutils_path(struct perf_env *env,
 122                                           const char *name, const char **path)
 123 {
 124         int idx;
 125         const char *arch = perf_env__arch(env), *cross_env;
 126         const char *const *path_list;
 127         char *buf = NULL;
 128
 129         /*
 130          * We don't need to try to find objdump path for native system.
 131          * Just use default binutils path (e.g.: "objdump").
 132          */
 133         if (!strcmp(perf_env__arch(NULL), arch))
 134                 goto out;
 135
 136         cross_env = getenv("CROSS_COMPILE");
 137         if (cross_env) {
 138                 if (asprintf(&buf, "%s%s", cross_env, name) < 0)
 139                         goto out_error;
 140                 if (buf[0] == '/') {
 141                         if (access(buf, F_OK) == 0)
 142                                 goto out;
 143                         goto out_error;
 144                 }
 145                 if (lookup_path(buf))
 146                         goto out;
 147                 zfree(&buf);
 148         }
 149
 150         if (!strcmp(arch, "arm"))
 151                 path_list = arm_triplets;
 152         else if (!strcmp(arch, "arm64"))
 153                 path_list = arm64_triplets;
 154         else if (!strcmp(arch, "powerpc"))
 155                 path_list = powerpc_triplets;
 156         else if (!strcmp(arch, "sh"))
 157                 path_list = sh_triplets;
 158         else if (!strcmp(arch, "s390"))
 159                 path_list = s390_triplets;
 160         else if (!strcmp(arch, "sparc"))
 161                 path_list = sparc_triplets;
 162         else if (!strcmp(arch, "x86"))
 163                 path_list = x86_triplets;
 164         else if (!strcmp(arch, "mips"))
 165                 path_list = mips_triplets;
 166         else {
 167                 ui__error("binutils for %s not supported.\n", arch);
 168                 goto out_error;
 169         }
 170
 171         idx = lookup_triplets(path_list, name);
 172         if (idx < 0) {
 173                 ui__error("Please install %s for %s.\n"
 174                           "You can add it to PATH, set CROSS_COMPILE or "
 175                           "override the default using --%s.\n",
 176                           name, arch, name);
 177                 goto out_error;
 178         }
 179
 180         if (asprintf(&buf, "%s%s", path_list[idx], name) < 0)
 181                 goto out_error;
 182
 183 out:
 184         *path = buf;
 185         return 0;
 186 out_error:
 187         free(buf);
 188         *path = NULL;
 189         return -1;
 190 }
 191
 192 int perf_env__lookup_objdump(struct perf_env *env, const char **path)
 193 {
 194         /*
 195          * For live mode, env->arch will be NULL and we can use
 196          * the native objdump tool.
 197          */
 198         if (env->arch == NULL)
 199                 return 0;
 200
 201         return perf_env__lookup_binutils_path(env, "objdump", path);
 202 }
 203
 204 /*
 205  * Some architectures have a single address space for kernel and user addresses,
 206  * which makes it possible to determine if an address is in kernel space or user
 207  * space.
 208  */
 209 bool perf_env__single_address_space(struct perf_env *env)
 210 {
 211         return strcmp(perf_env__arch(env), "sparc");
 212 }