derek.holloway
7502bf64a4
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100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
//===-- platform.h ----------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef SCUDO_PLATFORM_H_
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#define SCUDO_PLATFORM_H_
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// Transitive includes of stdint.h specify some of the defines checked below.
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#include <stdint.h>
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#if defined(__linux__) && !defined(__TRUSTY__)
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#define SCUDO_LINUX 1
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#else
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#define SCUDO_LINUX 0
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#endif
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// See https://android.googlesource.com/platform/bionic/+/master/docs/defines.md
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#if defined(__BIONIC__)
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#define SCUDO_ANDROID 1
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// Transitive includes of unistd.h will get PAGE_SIZE if it is defined.
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#include <unistd.h>
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#if defined(PAGE_SIZE)
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#define SCUDO_PAGE_SIZE PAGE_SIZE
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#endif
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#else
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#define SCUDO_ANDROID 0
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#endif
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#if defined(__Fuchsia__)
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#define SCUDO_FUCHSIA 1
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#else
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#define SCUDO_FUCHSIA 0
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#endif
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#if defined(__TRUSTY__)
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#define SCUDO_TRUSTY 1
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#else
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#define SCUDO_TRUSTY 0
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#endif
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#if defined(__riscv) && (__riscv_xlen == 64)
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#define SCUDO_RISCV64 1
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#else
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#define SCUDO_RISCV64 0
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#endif
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#if defined(__LP64__)
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#define SCUDO_WORDSIZE 64U
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#else
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#define SCUDO_WORDSIZE 32U
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#endif
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#if SCUDO_WORDSIZE == 64U
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#define FIRST_32_SECOND_64(a, b) (b)
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#else
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#define FIRST_32_SECOND_64(a, b) (a)
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#endif
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#ifndef SCUDO_CAN_USE_PRIMARY64
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#define SCUDO_CAN_USE_PRIMARY64 (SCUDO_WORDSIZE == 64U)
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#endif
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#ifndef SCUDO_CAN_USE_MTE
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#define SCUDO_CAN_USE_MTE (SCUDO_LINUX || SCUDO_TRUSTY)
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#endif
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#ifndef SCUDO_ENABLE_HOOKS
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#define SCUDO_ENABLE_HOOKS 0
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#endif
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#ifndef SCUDO_MIN_ALIGNMENT_LOG
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// We force malloc-type functions to be aligned to std::max_align_t, but there
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// is no reason why the minimum alignment for all other functions can't be 8
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// bytes. Except obviously for applications making incorrect assumptions.
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// TODO(kostyak): define SCUDO_MIN_ALIGNMENT_LOG 3
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#define SCUDO_MIN_ALIGNMENT_LOG FIRST_32_SECOND_64(3, 4)
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#endif
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#if defined(__aarch64__)
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#define SCUDO_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 48)
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#else
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#define SCUDO_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 47)
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#endif
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// Older gcc have issues aligning to a constexpr, and require an integer.
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// See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56859 among others.
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#if defined(__powerpc__) || defined(__powerpc64__)
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#define SCUDO_CACHE_LINE_SIZE 128
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#else
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#define SCUDO_CACHE_LINE_SIZE 64
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#endif
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#define SCUDO_POINTER_FORMAT_LENGTH FIRST_32_SECOND_64(8, 12)
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#endif // SCUDO_PLATFORM_H_
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