137 lines
3.9 KiB
C++
137 lines
3.9 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 PSPLOADER_H
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#define PSPLOADER_H
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#include "elf32.h"
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#include "common/list.h"
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#include "common/singleton.h"
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#define MAXDLERRLEN 80
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#define ShortsMan ShortSegmentManager::instance()
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class ShortSegmentManager : public Common::Singleton<ShortSegmentManager> {
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private:
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char *_shortsStart;
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char *_shortsEnd;
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public:
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char *getShortsStart() {
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return _shortsStart;
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}
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bool inGeneralSegment(char *addr) {
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return ((char *)addr >= _shortsStart && (char *)addr < _shortsEnd);
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}
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class Segment {
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private:
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friend class ShortSegmentManager;
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Segment(char *start, int size, char *origAddr) : _startAddress(start), _size(size), _origAddress(origAddr) {}
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~Segment() {}
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char *_startAddress; // Start of shorts segment in memory
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int _size; // Size of shorts segment
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char *_origAddress; // Original address this segment was supposed to be at
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public:
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char *getStart() {
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return _startAddress;
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}
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char *getEnd() {
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return (_startAddress + _size);
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}
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Elf32_Addr getOffset() {
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return (Elf32_Addr)(_startAddress - _origAddress);
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}
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bool inSegment(char *addr) {
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return ((char *)addr >= _startAddress && (char *)addr <= _startAddress + _size);
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}
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};
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Segment *newSegment(int size, char *origAddr);
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void deleteSegment(Segment *);
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private:
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ShortSegmentManager();
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friend class Common::Singleton<ShortSegmentManager>;
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Common::List<Segment *> _list;
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char *_highestAddress;
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};
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class DLObject {
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protected:
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char *_errbuf; /* For error messages, at least MAXDLERRLEN in size */
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ShortSegmentManager::Segment *_shortsSegment; // For assigning shorts ranges
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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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unsigned int _gpVal; // Value of Global Pointer
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int _segmentSize;
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void seterror(const char *fmt, ...);
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void unload();
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bool relocate(int fd, unsigned long offset, unsigned long size, void *);
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bool load(int fd);
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bool readElfHeader(int fd, Elf32_Ehdr *ehdr);
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bool readProgramHeaders(int fd, Elf32_Ehdr *ehdr, Elf32_Phdr *phdr, int num);
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bool loadSegment(int fd, Elf32_Phdr *phdr);
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Elf32_Shdr *loadSectionHeaders(int fd, Elf32_Ehdr *ehdr);
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int loadSymbolTable(int fd, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
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bool loadStringTable(int fd, Elf32_Shdr *shdr);
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void relocateSymbols(Elf32_Addr offset, Elf32_Addr shortsOffset);
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bool relocateRels(int fd, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
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public:
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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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DLObject(char *errbuf = NULL) : _errbuf(_errbuf), _shortsSegment(NULL), _segment(NULL), _symtab(NULL),
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_strtab(NULL), _symbol_cnt(0), _symtab_sect(-1), _dtors_start(NULL), _dtors_end(NULL), _gpVal(0) ,
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_segmentSize(0) {}
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};
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#define RTLD_LAZY 0
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extern "C" {
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void *dlopen(const char *filename, int flags);
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int dlclose(void *handle);
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void *dlsym(void *handle, const char *symbol);
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const char *dlerror();
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void dlforgetsyms(void *handle);
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}
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#endif /* PSPLOADER_H */
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