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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 V8_HOST_ARCH_IA32 || 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 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_ | |
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