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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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; either version 2
* of the License, or (at your option) any 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
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#ifndef LOADER_H
#define LOADER_H
#include "elf32.h"
#include "common/list.h"
#define MAXDLERRLEN 80
class DLObject {
protected:
char *_errbuf; /* For error messages, at least MAXDLERRLEN in size */
void *_segment, *_symtab;
char *_strtab;
int _symbol_cnt;
int _symtab_sect;
void *_dtors_start, *_dtors_end;
int _segmentSize;
void seterror(const char *fmt, ...);
void unload();
bool relocate(Common::SeekableReadStream* DLFile, unsigned long offset, unsigned long size, void *relSegment);
bool load(Common::SeekableReadStream* DLFile);
bool readElfHeader(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr);
bool readProgramHeaders(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Phdr *phdr, int num);
bool loadSegment(Common::SeekableReadStream* DLFile, Elf32_Phdr *phdr);
Elf32_Shdr *loadSectionHeaders(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr);
int loadSymbolTable(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
bool loadStringTable(Common::SeekableReadStream* DLFile, Elf32_Shdr *shdr);
void relocateSymbols(Elf32_Addr offset);
bool relocateRels(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
public:
bool open(const char *path);
bool close();
void *symbol(const char *name);
void discard_symtab();
DLObject(char *errbuf = NULL) : _errbuf(_errbuf), _segment(NULL), _symtab(NULL),
_strtab(NULL), _symbol_cnt(0), _symtab_sect(-1), _dtors_start(NULL), _dtors_end(NULL),
_segmentSize(0) {}
};
#define RTLD_LAZY 0
extern "C" {
void *dlopen(const char *filename, int flags);
int dlclose(void *handle);
void *dlsym(void *handle, const char *symbol);
const char *dlerror();
void dlforgetsyms(void *handle);
}
#endif /* LOADER_H */
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