94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
/***
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*tlssup.cpp - Thread Local Storage run-time support module
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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*
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****/
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#undef CRTDLL
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#undef MRTDLL
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#pragma section(".CRT$XLA", long, read) // First Loader TLS Callback
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#pragma section(".CRT$XLC", long, read) // CRT TLS Constructor
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#pragma section(".CRT$XLD", long, read) // CRT TLS Terminator
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#pragma section(".CRT$XLZ", long, read) // Last Loader TLS Callback
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#pragma section(".rdata$T", long, read)
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#define _CRTALLOC(x) __declspec(allocate(x))
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//#include <internal_shared.h>
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#include <Windows.h>
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extern "C" {
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/* Thread Local Storage index for this .EXE or .DLL */
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ULONG _tls_index = 0;
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ULONG _tls_array = 0;
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/* Special symbols to mark start and end of Thread Local Storage area. */
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#pragma data_seg(".tls")
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#if defined(_M_X64)
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_CRTALLOC(".tls")
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#endif /* defined (_M_X64) */
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char _tls_start = 0;
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#pragma data_seg(".tls$ZZZ")
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#if defined(_M_X64)
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_CRTALLOC(".tls$ZZZ")
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#endif /* defined (_M_X64) */
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char _tls_end = 0;
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#pragma data_seg()
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/* Start section for TLS callback array examined by the OS loader code.
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* If dynamic TLS initialization is used, then a pointer to __dyn_tls_init
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* will be placed in .CRT$XLC by inclusion of tlsdyn.obj. This will cause
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* the .CRT$XD? array of individual TLS variable initialization callbacks
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* to be walked.
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*/
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_CRTALLOC(".CRT$XLA") PIMAGE_TLS_CALLBACK __xl_a = 0;
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/* NULL terminator for TLS callback array. This symbol, __xl_z, is never
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* actually referenced anywhere, but it must remain. The OS loader code
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* walks the TLS callback array until it finds a NULL pointer, so this makes
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* sure the array is properly terminated.
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*/
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_CRTALLOC(".CRT$XLZ") PIMAGE_TLS_CALLBACK __xl_z = 0;
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#ifdef _WIN64
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_CRTALLOC(".rdata$T")
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extern const IMAGE_TLS_DIRECTORY64 _tls_used = {
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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 /* _WIN64 */
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_CRTALLOC(".rdata$T")
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extern const IMAGE_TLS_DIRECTORY _tls_used = {
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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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(ULONG)0 // characteristics
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};
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#endif /* _WIN64 */
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} // extern "C"
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