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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /include/iprt/alloca.h | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | include/iprt/alloca.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/include/iprt/alloca.h b/include/iprt/alloca.h new file mode 100644 index 00000000..76493dfa --- /dev/null +++ b/include/iprt/alloca.h @@ -0,0 +1,110 @@ +/** @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 */ + |