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/*********************************************************
* Copyright (C) 2009 VMware, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation version 2.1 and no later version.
*
* 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 Lesser GNU General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
*********************************************************/
/*********************************************************
* The contents of this file are subject to the terms of the Common
* Development and Distribution License (the "License") version 1.0
* and no later version. You may not use this file except in
* compliance with the License.
*
* You can obtain a copy of the License at
* http://www.opensource.org/licenses/cddl1.php
*
* See the License for the specific language governing permissions
* and limitations under the License.
*
*********************************************************/
/*
* vmk_exports.h --
*
* Macros for exporting symbols from vmkernel
*/
#ifndef _VMK_EXPORTS_H
#define _VMK_EXPORTS_H
#ifdef VMKERNEL
#include "vmkapi.h"
#include "vm_basic_defs.h"
/*
* The following macros allow you to export symbols from vmkernel,
* thus making them available for modules to access.
*
* The versions with no explicit name-space and version imply the
* default vmkernel name-space/version. They should be considered
* deprecated as they impede your ability to create very stable APIs.
*
* Sample usage:
*
* VMK_KERNEL_EXPORT(foo) : export foo
*
* VMK_KERNEL_ALIAS(foo, fooAlias) : export foo as fooAlias
*
* VMK_KERNEL_EXPORT_TO_NAMESPACE(foo, "ns", "ver") :
* export foo @ns:ver
*
* VMK_KERNEL_ALIAS_TO_NAMESPACE(foo, fooAlias, "ns", "ver") :
* export foo as fooAlias @ns:ver
*
* Further details on the name-space/version implementation can be
* found in the VMKAPI module headers and documentation. The 2 second
* version is that if you export foo@myns:1, modules wanting access to
* that symbol will require an explicit
* VMK_MODULE_NAMESPACE_REQUIRED("myns", "1") tag to see that symbol.
*/
#define VMK_KERNEL_EXPORT_SEC ".vmkexports"
#define VMK_KERNEL_EXPORT(symbol) \
asm(".pushsection " VMK_KERNEL_EXPORT_SEC ",\"aS\", @progbits\n" \
"\t.string \"" XSTR(symbol) "\" \n" "\t.popsection\n");
#define VMK_KERNEL_ALIAS(symbol, alias) \
asm(".pushsection " VMK_KERNEL_EXPORT_SEC ",\"aS\", @progbits\n" \
"\t.string \"" XSTR(symbol) "!" XSTR(alias) "\" \n" \
"\t.popsection\n");
/* name@namespace:version */
#define VMK_KERNEL_EXPORT_TO_NAMESPACE(symbol, namespace, version) \
asm(".pushsection " VMK_KERNEL_EXPORT_SEC ",\"aS\", @progbits\n" \
"\t.string \"" XSTR(symbol) "@" namespace ":" version "\" \n" \
"\t.popsection\n");
/* name!alias@namespace:version */
#define VMK_KERNEL_ALIAS_TO_NAMESPACE(symbol, alias, namespace, version) \
asm(".pushsection " VMK_KERNEL_EXPORT_SEC ",\"aS\", @progbits\n" \
"\t.string \"" XSTR(symbol) "!" XSTR(alias) "@" namespace ":" \
version "\" \n\t.popsection\n");
#else /* ! defined VMKERNEL */
/*
* Empty definitions for kernel exports when built in non-kernel environments.
*/
#define VMK_KERNEL_EXPORT(_symbol)
#define VMK_KERNEL_ALIAS(symbol, alias)
#define VMK_KERNEL_EXPORT_TO_NAMESPACE(symbol, namespace, version)
#define VMK_KERNEL_ALIAS_TO_NAMESPACE(symbol, alias, namespace, version)
#endif /* defined VMKERNEL */
#endif /* _VMK_EXPORTS_H */
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