//===-- linux.h -------------------------------------------------*- C++ -*-===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #ifndef SCUDO_LINUX_H_ #define SCUDO_LINUX_H_ #include "platform.h" #if SCUDO_LINUX namespace scudo { // MapPlatformData is unused on Linux, define it as a minimally sized structure. struct MapPlatformData {}; #if SCUDO_ANDROID #if defined(__aarch64__) #define __get_tls() \ ({ \ void **__v; \ __asm__("mrs %0, tpidr_el0" : "=r"(__v)); \ __v; \ }) #elif defined(__arm__) #define __get_tls() \ ({ \ void **__v; \ __asm__("mrc p15, 0, %0, c13, c0, 3" : "=r"(__v)); \ __v; \ }) #elif defined(__i386__) #define __get_tls() \ ({ \ void **__v; \ __asm__("movl %%gs:0, %0" : "=r"(__v)); \ __v; \ }) #elif defined(__x86_64__) #define __get_tls() \ ({ \ void **__v; \ __asm__("mov %%fs:0, %0" : "=r"(__v)); \ __v; \ }) #else #error "Unsupported architecture." #endif // The Android Bionic team has allocated a TLS slot for sanitizers starting // with Q, given that Android currently doesn't support ELF TLS. It is used to // store sanitizer thread specific data. static const int TLS_SLOT_SANITIZER = 6; ALWAYS_INLINE uptr *getAndroidTlsPtr() { return reinterpret_cast<uptr *>(&__get_tls()[TLS_SLOT_SANITIZER]); } #endif // SCUDO_ANDROID } // namespace scudo #endif // SCUDO_LINUX #endif // SCUDO_LINUX_H_ |