tools/perf/arch/common.c

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