| 1 | //===-- platform.h ----------------------------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef SCUDO_PLATFORM_H_ |
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| 10 | #define SCUDO_PLATFORM_H_ |
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| 11 | |
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| 12 | // Transitive includes of stdint.h specify some of the defines checked below. |
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| 13 | #include <stdint.h> |
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| 14 | |
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| 15 | #if defined(__linux__) && !defined(__TRUSTY__) |
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| 16 | #define SCUDO_LINUX 1 |
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| 17 | #else |
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| 18 | #define SCUDO_LINUX 0 |
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| 19 | #endif |
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| 20 | |
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| 21 | // See https://android.googlesource.com/platform/bionic/+/master/docs/defines.md |
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| 22 | #if defined(__BIONIC__) |
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| 23 | #define SCUDO_ANDROID 1 |
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| 24 | #else |
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| 25 | #define SCUDO_ANDROID 0 |
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| 26 | #endif |
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| 27 | |
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| 28 | #if defined(__Fuchsia__) |
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| 29 | #define SCUDO_FUCHSIA 1 |
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| 30 | #else |
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| 31 | #define SCUDO_FUCHSIA 0 |
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| 32 | #endif |
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| 33 | |
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| 34 | #if defined(__TRUSTY__) |
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| 35 | #define SCUDO_TRUSTY 1 |
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| 36 | #else |
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| 37 | #define SCUDO_TRUSTY 0 |
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| 38 | #endif |
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| 39 | |
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| 40 | #if defined(__riscv) && (__riscv_xlen == 64) |
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| 41 | #define SCUDO_RISCV64 1 |
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| 42 | #else |
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| 43 | #define SCUDO_RISCV64 0 |
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| 44 | #endif |
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| 45 | |
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| 46 | #if defined(__LP64__) |
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| 47 | #define SCUDO_WORDSIZE 64U |
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| 48 | #else |
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| 49 | #define SCUDO_WORDSIZE 32U |
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| 50 | #endif |
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| 51 | |
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| 52 | #if SCUDO_WORDSIZE == 64U |
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| 53 | #define FIRST_32_SECOND_64(a, b) (b) |
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| 54 | #else |
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| 55 | #define FIRST_32_SECOND_64(a, b) (a) |
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| 56 | #endif |
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| 57 | |
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| 58 | #ifndef SCUDO_CAN_USE_PRIMARY64 |
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| 59 | #define SCUDO_CAN_USE_PRIMARY64 (SCUDO_WORDSIZE == 64U) |
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| 60 | #endif |
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| 61 | |
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| 62 | #ifndef SCUDO_CAN_USE_MTE |
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| 63 | #define SCUDO_CAN_USE_MTE (SCUDO_LINUX || SCUDO_TRUSTY) |
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| 64 | #endif |
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| 65 | |
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| 66 | // Use smaller table sizes for fuzzing in order to reduce input size. |
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| 67 | // Trusty just has less available memory. |
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| 68 | #ifndef SCUDO_SMALL_STACK_DEPOT |
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| 69 | #if defined(SCUDO_FUZZ) || SCUDO_TRUSTY |
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| 70 | #define SCUDO_SMALL_STACK_DEPOT 1 |
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| 71 | #else |
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| 72 | #define SCUDO_SMALL_STACK_DEPOT 0 |
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| 73 | #endif |
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| 74 | #endif |
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| 75 | |
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| 76 | #ifndef SCUDO_ENABLE_HOOKS |
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| 77 | #define SCUDO_ENABLE_HOOKS 0 |
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| 78 | #endif |
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| 79 | |
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| 80 | #ifndef SCUDO_MIN_ALIGNMENT_LOG |
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| 81 | // We force malloc-type functions to be aligned to std::max_align_t, but there |
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| 82 | // is no reason why the minimum alignment for all other functions can't be 8 |
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| 83 | // bytes. Except obviously for applications making incorrect assumptions. |
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| 84 | // TODO(kostyak): define SCUDO_MIN_ALIGNMENT_LOG 3 |
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| 85 | #define SCUDO_MIN_ALIGNMENT_LOG FIRST_32_SECOND_64(3, 4) |
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| 86 | #endif |
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| 87 | |
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| 88 | #if defined(__aarch64__) |
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| 89 | #define SCUDO_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 48) |
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| 90 | #else |
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| 91 | #define SCUDO_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 47) |
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| 92 | #endif |
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| 93 | |
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| 94 | // Older gcc have issues aligning to a constexpr, and require an integer. |
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| 95 | // See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56859 among others. |
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| 96 | #if defined(__powerpc__) || defined(__powerpc64__) |
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| 97 | #define SCUDO_CACHE_LINE_SIZE 128 |
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| 98 | #else |
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| 99 | #define SCUDO_CACHE_LINE_SIZE 64 |
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| 100 | #endif |
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| 101 | |
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| 102 | #define SCUDO_POINTER_FORMAT_LENGTH FIRST_32_SECOND_64(8, 12) |
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| 103 | |
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| 104 | #endif // SCUDO_PLATFORM_H_ |
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| 105 | |
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