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 } 224