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#include "mipsobj.h"
section::section(const String & _name, int _type) : name(_name), type(_type), datas(0), length(0) { }
section::section() : name(""), type(-1), datas(0), length(0) { }
section::~section() {
if (datas)
free(datas);
}
void section::setname(const String & _name) {
name = _name;
}
void section::settype(int _type) {
type = _type;
}
void section::putdatas(const Uint8 * _datas, int _length) {
if (type != BSS) {
datas = (Uint8 *) realloc(datas, length + _length);
memcpy(datas + length, _datas, _length);
}
length += _length;
}
int section::gettype() {
return type;
}
int section::getsize() {
return length;
}
const Uint8 * section::getdatas() {
return datas;
}
void section::putreloc(const String & _symbol, int _type, Uint32 _offset) {
struct reloc_t r;
r.symbol = _symbol;
r.type = _type;
r.offset = _offset;
putreloc(r);
}
void section::putreloc(const struct reloc_t & r) {
relocs.push_back(r);
}
mipsobj::mipsobj() : loaded(false) { }
mipsobj::~mipsobj() { }
void loadELF(Handle * elf) throw (GeneralException) {
}
#define OBJSIG 0x024b4e4c
#define READNAME(_str, _file) { \
char _name[256]; \
int _len; \
\
_len = _file->readU8(); \
_file->read(_name, _len); \
_name[_len] = 0; \
_str = _name; \
}
void mipsobj::loadOBJ(Handle * obj) throw (GeneralException) {
int cursec, len, reloctype, relocexpr, id;
bool eof = false;
std::map<int, String> secnames;
std::map<int, String> symbolnames;
Uint8 * datas;
struct reloc_t reloc;
struct symbol_t symbol;
String name;
while (!eof) {
int entryid = obj->readU8();
switch (entryid) {
case 0x00:
eof = true;
break;
case 0x02:
len = obj->readU16();
datas = (Uint8 *) malloc(len);
obj->read(datas, len);
sections[secnames[cursec]].putdatas(datas, len);
free(datas);
break;
case 0x06:
cursec = obj->readU16();
break;
case 0x08:
len = obj->readU32();
sections[secnames[cursec]].putdatas(0, len);
break;
case 0x0a:
reloctype = obj->readU8();
reloc.offset = obj->readU16();
switch (reloctype) {
case 0x10:
reloc.type = R_MIPS_32;
break;
case 0x4a:
reloc.type = R_MIPS_26;
break;
case 0x52:
reloc.type = R_MIPS_HI16;
break;
case 0x54:
reloc.type = R_MIPS_LO16;
break;
case 0x0a:
case 0x26:
case 0x28:
case 0x64:
printm(M_ERROR, "Relocation type %02x not supported.\n", reloctype);
exit(-1);
break;
default:
printm(M_ERROR, "Relocation type %02x UNKNOWN! Please send the object to the author.\n", reloctype);
exit(-1);
}
relocexpr = obj->readU8();
switch (relocexpr) {
case 0x02:
reloc.symbol = symbolnames[obj->readU16()];
break;
case 0x04:
reloc.symbol = secnames[obj->readU16()];
break;
case 0x00:
case 0x0c:
case 0x16:
case 0x2c:
case 0x2e:
case 0x30:
case 0x32:
case 0x36:
printm(M_ERROR, "Relocation expression %02x not supported.\n", relocexpr);
exit(-1);
break;
default:
printm(M_ERROR, "Relocation expression %02x UNKNOWN! Please mail the author.\n", relocexpr);
exit(-1);
break;
}
sections[secnames[cursec]].relocs.push_back(reloc);
break;
case 0x0c:
id = obj->readU16();
symbol.section = obj->readU16();
symbol.offset = obj->readU32();
READNAME(symbol.name, obj);
symbol.type = GLOBAL;
symbolnames[id] = symbol.name;
break;
case 0x0e:
id = obj->readU16();
READNAME(symbol.name, obj);
symbol.type = EXTERN;
symbolnames[id] = symbol.name;
break;
case 0x10:
id = obj->readU16();
obj->readU8();
obj->readU16();
READNAME(name, obj);
secnames[id] = name;
break;
case 0x12:
printm(M_WARNING, "Local symbol not supported.\n");
obj->readU16();
obj->readU32();
READNAME(name, obj);
break;
case 0x1c:
printm(M_WARNING, "File number and name not supported.\n");
obj->readU16();
READNAME(name, obj);
break;
case 0x2e:
if ((id = obj->readU8()) != 7) {
printm(M_ERROR, "CPU type %i not supported.\n", id);
exit(-1);
}
break;
case 0x30:
printm(M_ERROR, "Constant not supported.\n");
exit(-1);
break;
default:
printm(M_ERROR, "Object entry type %i UNKNOWN! Please send the object to the author.\n", entryid);
exit(-1);
break;
}
}
}
#define LIBSIG 0x0142494c
void mipsobj::loadLIB(Handle * lib, const String & objname) throw (GeneralException) {
char _name[9];
String name;
int hsize, size, ptr;
bool found = false;
lib->seek(0);
if (lib->readU32() != LIBSIG) {
throw GeneralException("Not a Psy-Q lib file");
}
while (lib->tell() != lib->GetSize()) {
ptr = lib->tell();
lib->read(_name, 8);
name = _name;
lib->seek(4, SEEK_CUR);
hsize = lib->readU32();
size = lib->readU32();
if (objname == name.trim()) {
lib->seek(ptr + hsize);
found = true;
break;
}
lib->seek(ptr + size);
}
if (!found) {
throw GeneralException("Object `" + objname + "' not found in archive " + lib->GetName());
}
loadOBJ(lib);
}
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