1 //===-- platform.h ----------------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef SCUDO_PLATFORM_H_ 10 #define SCUDO_PLATFORM_H_ 11 12 // Transitive includes of stdint.h specify some of the defines checked below. 13 #include <stdint.h> 14 15 #if defined(__linux__) && !defined(__TRUSTY__) 16 #define SCUDO_LINUX 1 17 #else 18 #define SCUDO_LINUX 0 19 #endif 20 21 // See https://android.googlesource.com/platform/bionic/+/master/docs/defines.md 22 #if defined(__BIONIC__) 23 #define SCUDO_ANDROID 1 24 // Transitive includes of unistd.h will get PAGE_SIZE if it is defined. 25 #include <unistd.h> 26 #if defined(PAGE_SIZE) 27 #define SCUDO_PAGE_SIZE PAGE_SIZE 28 #endif 29 #else 30 #define SCUDO_ANDROID 0 31 #endif 32 33 #if defined(__Fuchsia__) 34 #define SCUDO_FUCHSIA 1 35 #else 36 #define SCUDO_FUCHSIA 0 37 #endif 38 39 #if defined(__TRUSTY__) 40 #define SCUDO_TRUSTY 1 41 #else 42 #define SCUDO_TRUSTY 0 43 #endif 44 45 #if defined(__riscv) && (__riscv_xlen == 64) 46 #define SCUDO_RISCV64 1 47 #else 48 #define SCUDO_RISCV64 0 49 #endif 50 51 #if defined(__LP64__) 52 #define SCUDO_WORDSIZE 64U 53 #else 54 #define SCUDO_WORDSIZE 32U 55 #endif 56 57 #if SCUDO_WORDSIZE == 64U 58 #define FIRST_32_SECOND_64(a, b) (b) 59 #else 60 #define FIRST_32_SECOND_64(a, b) (a) 61 #endif 62 63 #ifndef SCUDO_CAN_USE_PRIMARY64 64 #define SCUDO_CAN_USE_PRIMARY64 (SCUDO_WORDSIZE == 64U) 65 #endif 66 67 #ifndef SCUDO_CAN_USE_MTE 68 #define SCUDO_CAN_USE_MTE (SCUDO_LINUX || SCUDO_TRUSTY) 69 #endif 70 71 #ifndef SCUDO_ENABLE_HOOKS 72 #define SCUDO_ENABLE_HOOKS 0 73 #endif 74 75 #ifndef SCUDO_MIN_ALIGNMENT_LOG 76 // We force malloc-type functions to be aligned to std::max_align_t, but there 77 // is no reason why the minimum alignment for all other functions can't be 8 78 // bytes. Except obviously for applications making incorrect assumptions. 79 // TODO(kostyak): define SCUDO_MIN_ALIGNMENT_LOG 3 80 #define SCUDO_MIN_ALIGNMENT_LOG FIRST_32_SECOND_64(3, 4) 81 #endif 82 83 #if defined(__aarch64__) 84 #define SCUDO_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 48) 85 #else 86 #define SCUDO_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 47) 87 #endif 88 89 // Older gcc have issues aligning to a constexpr, and require an integer. 90 // See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56859 among others. 91 #if defined(__powerpc__) || defined(__powerpc64__) 92 #define SCUDO_CACHE_LINE_SIZE 128 93 #else 94 #define SCUDO_CACHE_LINE_SIZE 64 95 #endif 96 97 #define SCUDO_POINTER_FORMAT_LENGTH FIRST_32_SECOND_64(8, 12) 98 99 #endif // SCUDO_PLATFORM_H_ 100