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/* $Id: tlsdir-vcc.c $ */
/** @file
* IPRT - Visual C++ Compiler - PE/Windows TLS Directory.
*
* @note Doing this as a C file for same reasons as loadcfg-vcc.c.
*/
/*
* Copyright (C) 2022-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define IPRT_COMPILER_VCC_WITH_TLS_CALLBACK_SECTIONS
#define IPRT_COMPILER_VCC_WITH_TLS_DATA_SECTIONS
#include "internal/iprt.h"
#include <iprt/win/windows.h>
#include "internal/compiler-vcc.h"
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
/** @name TLS callback arrays.
*
* The important thing here are the section names, the linker is told to merge
* and sort all the .CRT* sections into .rdata.
*
* @{ */
/** Start of the TLS callback array. */
__declspec(allocate(".CRT$XLA")) PIMAGE_TLS_CALLBACK g_apfnRTVccTlsCallbacks_Start[] = { NULL, };
/** End of the TLS callback array (not actually used, but seems to be
* traditional). */
__declspec(allocate(".CRT$XLZ")) PIMAGE_TLS_CALLBACK g_apfnRTVccTlsCallbacks_End[] = { NULL, };
/* Tell the linker to merge the .CRT* sections into .rdata */
#pragma comment(linker, "/merge:.CRT=.rdata ")
/** @} */
/** @name TLS data arrays.
*
* @{ */
#pragma data_seg(".tls")
/** Start of the TLS data.
* @note The linker has a reference to name '_tls_start' indicating a possible
* required naming convention here.
* @note Not sure if the byte here is ignored or not... In assembly we could
* optimize it out, I think... */
extern __declspec(allocate(".tls")) char _tls_start = 0;
/** End of the TLS callback array.
* @note The linker has a reference to name '_tls_end' indicating a possible
* required naming convention here. */
extern __declspec(allocate(".tls$ZZZ")) char _tls_end = 0;
#pragma data_seg ()
/** @} */
/** The TLS index for the module we're linked into.
* The linker has a reference to the name '_tls_start', so this is probably
* fixed in some way. */
extern ULONG _tls_index = 0;
/**
* The TLS directory for the PE image.
*
* The name of this is dictated by the linker, as it looks for a _tls_used
* symbol and puts it's address and (somehow) size in the TLS data dir entry.
*/
extern __declspec(".rdata$T") /* seems to be tranditional, doubt it is necessary */
const RT_CONCAT(IMAGE_TLS_DIRECTORY, ARCH_BITS) _tls_used =
{
/* .StartAddressOfRawData = */ (uintptr_t)&_tls_start,
/* .EndAddressOfRawData = */ (uintptr_t)&_tls_end,
/* .AddressOfIndex = */ (uintptr_t)&_tls_index,
/* .AddressOfCallBacks = */ (uintptr_t)&g_apfnRTVccTlsCallbacks_Start[1],
/* .SizeOfZeroFill = */ 0,
/* .Characteristics = */ 0,
};
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