110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
/** @file
|
|
* IPRT - alloca().
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2006-2023 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_alloca_h
|
|
#define IPRT_INCLUDED_alloca_h
|
|
#ifndef RT_WITHOUT_PRAGMA_ONCE
|
|
# pragma once
|
|
#endif
|
|
|
|
#if defined(IN_RC) || defined(IN_RING0_AGNOSTIC)
|
|
# error "No alloca() in raw-mode and agnostic ring-0 context as it may have external dependencies like libgcc."
|
|
#endif
|
|
|
|
/*
|
|
* If there are more difficult platforms out there, we'll do OS
|
|
* specific #ifdefs. But for now we'll just include the headers
|
|
* which normally contains the alloca() prototype.
|
|
* When we're in kernel territory it starts getting a bit more
|
|
* interesting of course...
|
|
*/
|
|
#if defined(IN_RING0) \
|
|
&& ( defined(RT_OS_DARWIN) \
|
|
|| defined(RT_OS_FREEBSD) \
|
|
|| defined(RT_OS_LINUX) \
|
|
|| defined(RT_OS_NETBSD) \
|
|
|| defined(RT_OS_SOLARIS))
|
|
/* ASSUMES GNU C */
|
|
# define alloca(cb) __builtin_alloca(cb)
|
|
|
|
#elif defined(IPRT_NO_CRT) && defined(RT_OS_WINDOWS)
|
|
# include <iprt/types.h>
|
|
|
|
RT_C_DECLS_BEGIN
|
|
# ifdef RT_ARCH_X86
|
|
void * __cdecl _alloca(size_t);
|
|
# else
|
|
void *_alloca(size_t);
|
|
# endif
|
|
# define alloca _alloca
|
|
RT_C_DECLS_END
|
|
|
|
#else
|
|
# include <stdlib.h>
|
|
# if !defined(RT_OS_DARWIN) && !defined(RT_OS_FREEBSD) && !defined(RT_OS_NETBSD)
|
|
# include <malloc.h>
|
|
# endif
|
|
# if defined(RT_OS_SOLARIS) || defined(RT_OS_LINUX)
|
|
# include <alloca.h>
|
|
# endif
|
|
|
|
# if defined(RT_OS_SOLARIS) && (defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)) \
|
|
&& defined(_SYS_REGSET_H) && !defined(IPRT_NO_SOLARIS_UCONTEXT_CLEANUPS)
|
|
/* Solaris' sys/regset.h pollutes the namespace with register constants that
|
|
frequently conflicts with structure members and variable/parameter names. */
|
|
# undef CS
|
|
# undef DS
|
|
# undef EAX
|
|
# undef EBP
|
|
# undef EBX
|
|
# undef ECX
|
|
# undef EDI
|
|
# undef EDX
|
|
# undef EFL
|
|
# undef EIP
|
|
# undef ERR
|
|
# undef ES
|
|
# undef ESI
|
|
# undef ESP
|
|
# undef FS
|
|
# undef GS
|
|
# undef SS
|
|
# undef TRAPNO
|
|
# undef UESP
|
|
# endif
|
|
#endif
|
|
|
|
#endif /* !IPRT_INCLUDED_alloca_h */
|
|
|