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