97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
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/***
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*tlssup.c - Thread Local Storage run-time support module
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*
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* Copyright (c) 1993-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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*
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*Revision History:
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* 03-19-93 SKS Original Version from Chuck Mitchell
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* 11-16-93 GJF Enclosed in #ifdef _MSC_VER
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* 02-17-94 SKS Add "const" to declaration of _tls_used
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* to work around problems with MIPS compiler.
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* Also added a canonical file header comment.
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* 09-01-94 SKS Change include file from <nt.h> to <windows.h>
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* 03-04-98 JWM Modified for WIN64 - uses _IMAGE_TLS_DIRECTORY64
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* 04-03-98 JWM _tls_start & _tls_end are no longer initialized.
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* 01-21-99 GJF Added a couple ULONGLONG casts.
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* 04-28-99 PML Wrap __declspec(allocate()) in _CRTALLOC macro.
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* 09-06-00 PML _tls_start/_tls_end can be 1 byte long (vs7#154062)
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* 03-24-01 PML callback array starts at __xl_a+1, not __xl_a.
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*
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****/
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#ifdef _MSC_VER
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#include <sect_attribs.h>
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#include <windows.h>
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/* Thread Local Storage index for this .EXE or .DLL */
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ULONG _tls_index = 0;
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/* Special symbols to mark start and end of Thread Local Storage area. */
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#pragma data_seg(".tls")
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_CRTALLOC(".tls") char _tls_start = 0;
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#pragma data_seg(".tls$ZZZ")
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_CRTALLOC(".tls$ZZZ") char _tls_end = 0;
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/* Start and end sections for Threadl Local Storage CallBack Array.
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* Actual array is constructed using .CRT$XLA, .CRT$XLC, .CRT$XLL,
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* .CRT$XLU, .CRT$XLZ similar to the way global
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* static initializers are done for C++.
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*/
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#pragma data_seg(".CRT$XLA")
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_CRTALLOC(".CRT$XLA") PIMAGE_TLS_CALLBACK __xl_a = 0;
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#pragma data_seg(".CRT$XLZ")
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_CRTALLOC(".CRT$XLZ") PIMAGE_TLS_CALLBACK __xl_z = 0;
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#pragma data_seg(".rdata$T")
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#ifndef IMAGE_SCN_SCALE_INDEX
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#define IMAGE_SCN_SCALE_INDEX 0x00000001 // Tls index is scaled
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#endif
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#ifdef _WIN64
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__declspec(allocate(".rdata$T")) const IMAGE_TLS_DIRECTORY64 _tls_used =
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{
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(ULONGLONG) &_tls_start, // start of tls data
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(ULONGLONG) &_tls_end, // end of tls data
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(ULONGLONG) &_tls_index, // address of tls_index
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(ULONGLONG) (&__xl_a+1), // pointer to call back array
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(ULONG) 0, // size of tls zero fill
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(ULONG) 0 // characteristics
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};
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#else
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const IMAGE_TLS_DIRECTORY _tls_used =
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{
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(ULONG)(ULONG_PTR) &_tls_start, // start of tls data
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(ULONG)(ULONG_PTR) &_tls_end, // end of tls data
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(ULONG)(ULONG_PTR) &_tls_index, // address of tls_index
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(ULONG)(ULONG_PTR) (&__xl_a+1), // pointer to call back array
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(ULONG) 0, // size of tls zero fill
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#if defined(_M_MRX000)
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(ULONG)IMAGE_SCN_SCALE_INDEX // characteristics
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#else
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(ULONG) 0 // characteristics
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#endif
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};
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#endif
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#endif /* _MSC_VER */
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