diff options
Diffstat (limited to 'src/VBox/Runtime/common/compiler/vcc/tlsdir-vcc.c')
| -rw-r--r-- | src/VBox/Runtime/common/compiler/vcc/tlsdir-vcc.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/compiler/vcc/tlsdir-vcc.c b/src/VBox/Runtime/common/compiler/vcc/tlsdir-vcc.c new file mode 100644 index 00000000..b151bbe5 --- /dev/null +++ b/src/VBox/Runtime/common/compiler/vcc/tlsdir-vcc.c @@ -0,0 +1,114 @@ +/* $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, +}; + |