forked from OSchip/llvm-project
71 lines
2.8 KiB
C++
71 lines
2.8 KiB
C++
//===-- linux.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_LINUX_H_
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#define SCUDO_LINUX_H_
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#include "platform.h"
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#if SCUDO_LINUX
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namespace scudo {
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// MapPlatformData is unused on Linux, define it as a minimally sized structure.
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struct MapPlatformData {};
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#if SCUDO_ANDROID
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#if defined(__aarch64__)
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#define __get_tls() \
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({ \
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void **__v; \
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__asm__("mrs %0, tpidr_el0" : "=r"(__v)); \
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__v; \
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})
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#elif defined(__arm__)
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#define __get_tls() \
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({ \
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void **__v; \
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__asm__("mrc p15, 0, %0, c13, c0, 3" : "=r"(__v)); \
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__v; \
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})
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#elif defined(__i386__)
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#define __get_tls() \
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({ \
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void **__v; \
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__asm__("movl %%gs:0, %0" : "=r"(__v)); \
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__v; \
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})
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#elif defined(__x86_64__)
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#define __get_tls() \
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({ \
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void **__v; \
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__asm__("mov %%fs:0, %0" : "=r"(__v)); \
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__v; \
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})
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#else
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#error "Unsupported architecture."
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#endif
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// The Android Bionic team has allocated a TLS slot for sanitizers starting
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// with Q, given that Android currently doesn't support ELF TLS. It is used to
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// store sanitizer thread specific data.
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static const int TLS_SLOT_SANITIZER = 6;
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ALWAYS_INLINE uptr *getAndroidTlsPtr() {
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return reinterpret_cast<uptr *>(&__get_tls()[TLS_SLOT_SANITIZER]);
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}
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#endif // SCUDO_ANDROID
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} // namespace scudo
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#endif // SCUDO_LINUX
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#endif // SCUDO_LINUX_H_
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