1// Copyright 2011 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28#ifndef V8_PLATFORM_TLS_MAC_H_ 29#define V8_PLATFORM_TLS_MAC_H_ 30 31#include "globals.h" 32 33namespace v8 { 34namespace internal { 35 36#if defined(V8_HOST_ARCH_IA32) || defined(V8_HOST_ARCH_X64) 37 38#define V8_FAST_TLS_SUPPORTED 1 39 40extern intptr_t kMacTlsBaseOffset; 41 42INLINE(intptr_t InternalGetExistingThreadLocal(intptr_t index)); 43 44inline intptr_t InternalGetExistingThreadLocal(intptr_t index) { 45 intptr_t result; 46#if defined(V8_HOST_ARCH_IA32) 47 asm("movl %%gs:(%1,%2,4), %0;" 48 :"=r"(result) // Output must be a writable register. 49 :"r"(kMacTlsBaseOffset), "r"(index)); 50#else 51 asm("movq %%gs:(%1,%2,8), %0;" 52 :"=r"(result) 53 :"r"(kMacTlsBaseOffset), "r"(index)); 54#endif 55 return result; 56} 57 58#endif 59 60} } // namespace v8::internal 61 62#endif // V8_PLATFORM_TLS_MAC_H_ 63