2596143e2b
The ELF loader does not have access to the symbols of the main executable, it just relocates symbols to it via fixed offsets. We need to make sure that loaded plugins are from the same link process to prevent crashes. An embedded build date is used for that. svn-id: r52730
84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#ifndef BACKENDS_PLUGINS_ELF_PROVIDER_H
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#define BACKENDS_PLUGINS_ELF_PROVIDER_H
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#include "common/scummsys.h"
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#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)
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#include "backends/plugins/elf/elf-loader.h"
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#include "common/fs.h"
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/**
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* ELFPlugin
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*
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* Objects of this class are returned when the PluginManager calls
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* getPlugins() on an ELFPluginProvider. An intermediary class for
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* dealing with plugin files, ELFPlugin is responsible for creating/destroying
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* a DLObject that handles the opening/loading/unloading of the plugin file whose
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* path in the target backend's file system is "_filename".
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*/
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class ELFPlugin : public DynamicPlugin {
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protected:
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typedef const char *(*CharFunc)();
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DLObject *_dlHandle;
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Common::String _filename;
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void *_dso_handle;
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virtual VoidFunc findSymbol(const char *symbol);
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public:
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ELFPlugin(const Common::String &filename) :
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_dlHandle(0),
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_filename(filename),
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_dso_handle(0) {
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}
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virtual ~ELFPlugin() {
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if (_dlHandle)
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unloadPlugin();
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}
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virtual DLObject *makeDLObject() = 0;
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bool loadPlugin();
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void unloadPlugin();
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};
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class ELFPluginProvider : public FilePluginProvider {
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protected:
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virtual Plugin *createPlugin(const Common::FSNode &node) const = 0;
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bool isPluginFilename(const Common::FSNode &node) const;
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};
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#endif // defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)
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#endif /* BACKENDS_PLUGINS_ELF_PROVIDER_H */
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