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/* $Id: compiler-vcc.h $ */
/** @file
* IPRT - Internal header for the Visual C++ Compiler Support Code.
*/
/*
* 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
*/
#ifndef IPRT_INCLUDED_INTERNAL_compiler_vcc_h
#define IPRT_INCLUDED_INTERNAL_compiler_vcc_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/types.h>
/** @name Special sections.
* @{
*/
#ifdef IPRT_COMPILER_VCC_WITH_C_INIT_TERM_SECTIONS
# pragma section(".CRT$XIA", read, long) /* start C initializers */
# pragma section(".CRT$XIAA", read, long)
# pragma section(".CRT$XIZ", read, long)
# pragma section(".CRT$XPA", read, long) /* start early C terminators */
# pragma section(".CRT$XPAA", read, long)
# pragma section(".CRT$XPZ", read, long)
# pragma section(".CRT$XTA", read, long) /* start C terminators */
# pragma section(".CRT$XTAA", read, long)
# pragma section(".CRT$XTZ", read, long)
# define IPRT_COMPILER_TERM_CALLBACK(a_fn) \
__declspec(allocate(".CRT$XTAA")) PFNRT RT_CONCAT(g_rtVccTermCallback_, a_fn) = a_fn
#endif
#ifdef IPRT_COMPILER_VCC_WITH_CPP_INIT_SECTIONS
# pragma warning(disable:5247) /* warning C5247: section '.CRT$XCA' is reserved for C++ dynamic initialization. Manually creating the section will interfere with C++ dynamic initialization and may lead to undefined behavior */
# pragma warning(disable:5248) /* warning C5248: section '.CRT$XCA' is reserved for C++ dynamic initialization. Variables manually put into the section may be optimized out and their order relative to compiler generated dynamic initializers is unspecified */
# pragma section(".CRT$XCA", read, long) /* start C++ initializers */
# pragma section(".CRT$XCAA", read, long)
# pragma section(".CRT$XCZ", read, long)
#endif
#ifdef IPRT_COMPILER_VCC_WITH_RTC_INIT_TERM_SECTIONS
# pragma section(".rtc$IAA", read, long) /* start RTC initializers */
# pragma section(".rtc$IZZ", read, long)
# pragma section(".rtc$TAA", read, long) /* start RTC terminators */
# pragma section(".rtc$TZZ", read, long)
#endif
#ifdef IPRT_COMPILER_VCC_WITH_TLS_CALLBACK_SECTIONS
# pragma section(".CRT$XLA", read, long) /* start TLS callback */
# pragma section(".CRT$XLAA", read, long)
# pragma section(".CRT$XLZ", read, long)
/** @todo what about .CRT$XDA? Dynamic TLS initializers. */
#endif
#ifdef IPRT_COMPILER_VCC_WITH_TLS_DATA_SECTIONS
# pragma section(".tls", read, long) /* start TLS callback */
# pragma section(".tls$ZZZ", read, long)
/** @todo what about .CRT$XDA? Dynamic TLS initializers. */
#endif
/** @} */
RT_C_DECLS_BEGIN
extern unsigned _fltused;
void rtVccInitSecurityCookie(void) RT_NOEXCEPT;
void rtVccWinInitBssOnNt3(void *pvImageBase) RT_NOEXCEPT;
void rtVccWinInitProcExecPath(void) RT_NOEXCEPT;
int rtVccInitializersRunInit(void) RT_NOEXCEPT;
void rtVccInitializersRunTerm(void) RT_NOEXCEPT;
void rtVccTermRunAtExit(void) RT_NOEXCEPT;
struct _CONTEXT;
void rtVccCheckContextFailed(struct _CONTEXT *pCpuCtx);
#ifdef _CONTROL_FLOW_GUARD
DECLASM(void) __guard_check_icall_nop(uintptr_t); /**< nocrt-guard-win.asm */
#endif
extern uintptr_t __guard_check_icall_fptr; /**< nocrt-guard-win.asm */
RT_C_DECLS_END
/**
* Checks if CFG is currently active.
*
* This requires CFG to be enabled at compile time, supported by the host OS
* version and activated by the module loader.
*
* @returns true if CFG is active, false if not.
*/
DECLINLINE(bool) rtVccIsGuardICallChecksActive(void)
{
#ifdef _CONTROL_FLOW_GUARD
return __guard_check_icall_fptr != (uintptr_t)__guard_check_icall_nop;
#else
return false;
#endif
}
#ifdef IPRT_INCLUDED_nt_nt_h
/**
* Checks if a pointer is on the officially registered stack or not.
*
* @returns true if on the official stack, false if not.
* @param uStackPtr The pointer to check.
*/
DECLINLINE(bool) rtVccIsPointerOnTheStack(uintptr_t uStackPtr)
{
PNT_TIB const pTib = (PNT_TIB)RTNtCurrentTeb();
return uStackPtr <= (uintptr_t)pTib->StackBase
&& uStackPtr >= (uintptr_t)pTib->StackLimit;
}
#endif
#endif /* !IPRT_INCLUDED_INTERNAL_compiler_vcc_h */
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