83 lines
2.8 KiB
C++
83 lines
2.8 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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#if defined(DYNAMIC_MODULES) && defined(ELF_LOADER_TARGET)
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#ifndef ELF_LOADER_H
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#define ELF_LOADER_H
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#include <stddef.h>
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#include "backends/plugins/dynamic-plugin.h"
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#include "backends/plugins/elf32.h"
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#include "common/stream.h"
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/**
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* DLObject
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*
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* Class that most directly handles operations on a plugin file
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* (opening it for reading, loading/unloading it in memory, finding a specific symbol in the file, etc.)
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* Subclasses have the same functionality, but implementations specific to different processors/platforms.
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*/
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class DLObject {
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protected:
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void *_segment, *_symtab;
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char *_strtab;
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int _symbol_cnt;
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int _symtab_sect;
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void *_dtors_start, *_dtors_end;
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uint32 _segmentSize;
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ptrdiff_t _segmentOffset;
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uint32 _segmentVMA;
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virtual void unload();
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bool load(Common::SeekableReadStream* DLFile);
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bool readElfHeader(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr);
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bool readProgramHeaders(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Phdr *phdr, int num);
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virtual bool loadSegment(Common::SeekableReadStream* DLFile, Elf32_Phdr *phdr);
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Elf32_Shdr *loadSectionHeaders(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr);
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int loadSymbolTable(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
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bool loadStringTable(Common::SeekableReadStream* DLFile, Elf32_Shdr *shdr);
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virtual void relocateSymbols(ptrdiff_t offset);
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virtual bool relocate(Common::SeekableReadStream* DLFile, unsigned long offset, unsigned long size, void *relSegment) = 0;
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virtual bool relocateRels(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr) = 0;
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public:
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DLObject();
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virtual ~DLObject();
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bool open(const char *path);
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bool close();
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void *symbol(const char *name);
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void discard_symtab();
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};
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#endif /* ELF_LOADER_H */
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#endif /* defined(DYNAMIC_MODULES) && defined(ELF_LOADER_TARGET) */
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