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 s390_triplets[] = {
  47         "s390-ibm-linux-",
  48         "s390x-linux-gnu-",
  49         NULL
  50 };
  51
  52 const char *const sh_triplets[] = {
  53         "sh-unknown-linux-gnu-",
  54         "sh-linux-gnu-",
  55         NULL
  56 };
  57
  58 const char *const sparc_triplets[] = {
  59         "sparc-unknown-linux-gnu-",
  60         "sparc64-unknown-linux-gnu-",
  61         "sparc64-linux-gnu-",
  62         NULL
  63 };
  64
  65 const char *const x86_triplets[] = {
  66         "x86_64-pc-linux-gnu-",
  67         "x86_64-unknown-linux-gnu-",
  68         "i686-pc-linux-gnu-",
  69         "i586-pc-linux-gnu-",
  70         "i486-pc-linux-gnu-",
  71         "i386-pc-linux-gnu-",
  72         "i686-linux-android-",
  73         "i686-android-linux-",
  74         "x86_64-linux-gnu-",
  75         "i586-linux-gnu-",
  76         NULL
  77 };
  78
  79 const char *const mips_triplets[] = {
  80         "mips-unknown-linux-gnu-",
  81         "mipsel-linux-android-",
  82         "mips-linux-gnu-",
  83         "mips64-linux-gnu-",
  84         "mips64el-linux-gnuabi64-",
  85         "mips64-linux-gnuabi64-",
  86         "mipsel-linux-gnu-",
  87         NULL
  88 };
  89
  90 static bool lookup_path(char *name)
  91 {
  92         bool found = false;
  93         char *path, *tmp = NULL;
  94         char buf[PATH_MAX];
  95         char *env = getenv("PATH");
  96
  97         if (!env)
  98                 return false;
  99
 100         env = strdup(env);
 101         if (!env)
 102                 return false;
 103
 104         path = strtok_r(env, ":", &tmp);
 105         while (path) {
 106                 scnprintf(buf, sizeof(buf), "%s/%s", path, name);
 107                 if (access(buf, F_OK) == 0) {
 108                         found = true;
 109                         break;
 110                 }
 111                 path = strtok_r(NULL, ":", &tmp);
 112         }
 113         free(env);
 114         return found;
 115 }
 116
 117 static int lookup_triplets(const char *const *triplets, const char *name)
 118 {
 119         int i;
 120         char buf[PATH_MAX];
 121
 122         for (i = 0; triplets[i] != NULL; i++) {
 123                 scnprintf(buf, sizeof(buf), "%s%s", triplets[i], name);
 124                 if (lookup_path(buf))
 125                         return i;
 126         }
 127         return -1;
 128 }
 129
 130 static int perf_env__lookup_binutils_path(struct perf_env *env,
 131                                           const char *name, char **path)
 132 {
 133         int idx;
 134         const char *arch = perf_env__arch(env), *cross_env;
 135         const char *const *path_list;
 136         char *buf = NULL;
 137
 138         /*
 139          * We don't need to try to find objdump path for native system.
 140          * Just use default binutils path (e.g.: "objdump").
 141          */
 142         if (!strcmp(perf_env__arch(NULL), arch))
 143                 goto out;
 144
 145         cross_env = getenv("CROSS_COMPILE");
 146         if (cross_env) {
 147                 if (asprintf(&buf, "%s%s", cross_env, name) < 0)
 148                         goto out_error;
 149                 if (buf[0] == '/') {
 150                         if (access(buf, F_OK) == 0)
 151                                 goto out;
 152                         goto out_error;
 153                 }
 154                 if (lookup_path(buf))
 155                         goto out;
 156                 zfree(&buf);
 157         }
 158
 159         if (!strcmp(arch, "arc"))
 160                 path_list = arc_triplets;
 161         else if (!strcmp(arch, "arm"))
 162                 path_list = arm_triplets;
 163         else if (!strcmp(arch, "arm64"))
 164                 path_list = arm64_triplets;
 165         else if (!strcmp(arch, "powerpc"))
 166                 path_list = powerpc_triplets;
 167         else if (!strcmp(arch, "sh"))
 168                 path_list = sh_triplets;
 169         else if (!strcmp(arch, "s390"))
 170                 path_list = s390_triplets;
 171         else if (!strcmp(arch, "sparc"))
 172                 path_list = sparc_triplets;
 173         else if (!strcmp(arch, "x86"))
 174                 path_list = x86_triplets;
 175         else if (!strcmp(arch, "mips"))
 176                 path_list = mips_triplets;
 177         else {
 178                 ui__error("binutils for %s not supported.\n", arch);
 179                 goto out_error;
 180         }
 181
 182         idx = lookup_triplets(path_list, name);
 183         if (idx < 0) {
 184                 ui__error("Please install %s for %s.\n"
 185                           "You can add it to PATH, set CROSS_COMPILE or "
 186                           "override the default using --%s.\n",
 187                           name, arch, name);
 188                 goto out_error;
 189         }
 190
 191         if (asprintf(&buf, "%s%s", path_list[idx], name) < 0)
 192                 goto out_error;
 193
 194 out:
 195         *path = buf;
 196         return 0;
 197 out_error:
 198         free(buf);
 199         *path = NULL;
 200         return -1;
 201 }
 202
 203 int perf_env__lookup_objdump(struct perf_env *env, char **path)
 204 {
 205         /*
 206          * For live mode, env->arch will be NULL and we can use
 207          * the native objdump tool.
 208          */
 209         if (env->arch == NULL)
 210                 return 0;
 211
 212         return perf_env__lookup_binutils_path(env, "objdump", path);
 213 }
 214
 215 /*
 216  * Some architectures have a single address space for kernel and user addresses,
 217  * which makes it possible to determine if an address is in kernel space or user
 218  * space.
 219  */
 220 bool perf_env__single_address_space(struct perf_env *env)
 221 {
 222         return strcmp(perf_env__arch(env), "sparc");
 223 }