1 /* 2 * Copyright (c) 2018 Google, Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <string.h> 18 #include <stdlib.h> 19 20 typedef enum { 21 BCC_ARCH_PPC, 22 BCC_ARCH_PPC_LE, 23 BCC_ARCH_S390X, 24 BCC_ARCH_ARM64, 25 BCC_ARCH_X86 26 } bcc_arch_t; 27 28 typedef void *(*arch_callback_t)(bcc_arch_t arch); 29 30 static void *run_arch_callback(arch_callback_t fn) 31 { 32 const char *archenv = getenv("ARCH"); 33 34 /* If ARCH is not set, detect from local arch clang is running on */ 35 if (!archenv) { 36 #if defined(__powerpc64__) 37 #if defined(_CALL_ELF) && _CALL_ELF == 2 38 return fn(BCC_ARCH_PPC_LE); 39 #else 40 return fn(BCC_ARCH_PPC); 41 #endif 42 #elif defined(__s390x__) 43 return fn(BCC_ARCH_S390X); 44 #elif defined(__aarch64__) 45 return fn(BCC_ARCH_ARM64); 46 #else 47 return fn(BCC_ARCH_X86); 48 #endif 49 } 50 51 /* Otherwise read it from ARCH */ 52 if (!strcmp(archenv, "powerpc")) { 53 #if defined(_CALL_ELF) && _CALL_ELF == 2 54 return fn(BCC_ARCH_PPC_LE); 55 #else 56 return fn(BCC_ARCH_PPC); 57 #endif 58 } else if (!strcmp(archenv, "s390x")) { 59 return fn(BCC_ARCH_S390X); 60 } else if (!strcmp(archenv, "arm64")) { 61 return fn(BCC_ARCH_ARM64); 62 } else { 63 return fn(BCC_ARCH_X86); 64 } 65 } 66
