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 33 namespace v8 { 34 namespace internal { 35 36 #if defined(V8_HOST_ARCH_IA32) || defined(V8_HOST_ARCH_X64) 37 38 #define V8_FAST_TLS_SUPPORTED 1 39 40 extern intptr_t kMacTlsBaseOffset; 41 42 INLINE(intptr_t InternalGetExistingThreadLocal(intptr_t index)); 43 44 inline 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
