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_MIPS, 26 BCC_ARCH_RISCV64, 27 BCC_ARCH_LOONGARCH, 28 BCC_ARCH_X86 29 } bcc_arch_t; 30 31 typedef void *(*arch_callback_t)(bcc_arch_t arch, bool for_syscall); 32 33 static void *run_arch_callback(arch_callback_t fn, bool for_syscall = false) 34 { 35 const char *archenv = getenv("ARCH"); 36 37 /* If ARCH is not set, detect from local arch clang is running on */ 38 if (!archenv) { 39 #if defined(__powerpc64__) 40 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 41 return fn(BCC_ARCH_PPC_LE, for_syscall); 42 #else 43 return fn(BCC_ARCH_PPC, for_syscall); 44 #endif 45 #elif defined(__s390x__) 46 return fn(BCC_ARCH_S390X, for_syscall); 47 #elif defined(__aarch64__) 48 return fn(BCC_ARCH_ARM64, for_syscall); 49 #elif defined(__mips__) 50 return fn(BCC_ARCH_MIPS, for_syscall); 51 #elif defined(__riscv) && (__riscv_xlen == 64) 52 return fn(BCC_ARCH_RISCV64, for_syscall); 53 #elif defined(__loongarch__) 54 return fn(BCC_ARCH_LOONGARCH, for_syscall); 55 #else 56 return fn(BCC_ARCH_X86, for_syscall); 57 #endif 58 } 59 60 /* Otherwise read it from ARCH */ 61 if (!strcmp(archenv, "powerpc")) { 62 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 63 return fn(BCC_ARCH_PPC_LE, for_syscall); 64 #else 65 return fn(BCC_ARCH_PPC, for_syscall); 66 #endif 67 } else if (!strcmp(archenv, "s390x")) { 68 return fn(BCC_ARCH_S390X, for_syscall); 69 } else if (!strcmp(archenv, "arm64")) { 70 return fn(BCC_ARCH_ARM64, for_syscall); 71 } else if (!strcmp(archenv, "mips")) { 72 return fn(BCC_ARCH_MIPS, for_syscall); 73 } else if (!strcmp(archenv, "riscv64")) { 74 return fn(BCC_ARCH_RISCV64, for_syscall); 75 } else if (!strcmp(archenv, "loongarch")) { 76 return fn(BCC_ARCH_LOONGARCH, for_syscall); 77 } else { 78 return fn(BCC_ARCH_X86, for_syscall); 79 } 80 } 81