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| 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 INLINE(intptr_t InternalGetExistingThreadLocal(intptr_t index)); |
| 41 |
| 42 inline intptr_t InternalGetExistingThreadLocal(intptr_t index) { |
| 43 // The constants below are taken from pthreads.s from the XNU kernel |
| 44 // sources archive at www.opensource.apple.com. |
| 45 intptr_t result; |
| 46 #if defined(V8_HOST_ARCH_IA32) |
| 47 asm("movl %%gs:0x48(,%1,4), %0;" |
| 48 :"=r"(result) // Output must be a writable register. |
| 49 :"0"(index)); // Input is the same as output. |
| 50 #else |
| 51 asm("movq %%gs:0x60(,%1,8), %0;" |
| 52 :"=r"(result) |
| 53 :"0"(index)); |
| 54 #endif |
| 55 return result; |
| 56 } |
| 57 |
| 58 #endif |
| 59 |
| 60 } } // namespace v8::internal |
| 61 |
| 62 #endif // V8_PLATFORM_TLS_MAC_H_ |
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