private ElfRel GetRelocation(long Position)
{
long Offset = Memory.ReadInt64(Position + 0);
long Info = Memory.ReadInt64(Position + 8);
long Addend = Memory.ReadInt64(Position + 16);
int RelType = (int)(Info >> 0);
int SymIdx = (int)(Info >> 32);
ElfSym Symbol = GetSymbol(SymIdx);
return(new ElfRel(Offset, Addend, Symbol, (ElfRelType)RelType));
}
public Executable(IExecutable Exe, AMemory Memory, long ImageBase)
{
Dynamic = new List <ElfDyn>();
m_SymbolTable = new Dictionary <long, string>();
Name = Exe.Name;
this.Memory = Memory;
this.ImageBase = ImageBase;
this.ImageEnd = ImageBase;
WriteData(ImageBase + Exe.TextOffset, Exe.Text, MemoryType.CodeStatic, AMemoryPerm.RX);
WriteData(ImageBase + Exe.ROOffset, Exe.RO, MemoryType.CodeMutable, AMemoryPerm.Read);
WriteData(ImageBase + Exe.DataOffset, Exe.Data, MemoryType.CodeMutable, AMemoryPerm.RW);
if (Exe.Mod0Offset == 0)
{
int BssOffset = Exe.DataOffset + Exe.Data.Length;
int BssSize = Exe.BssSize;
MapBss(ImageBase + BssOffset, BssSize);
ImageEnd = ImageBase + BssOffset + BssSize;
return;
}
long Mod0Offset = ImageBase + Exe.Mod0Offset;
int Mod0Magic = Memory.ReadInt32(Mod0Offset + 0x0);
long DynamicOffset = Memory.ReadInt32(Mod0Offset + 0x4) + Mod0Offset;
long BssStartOffset = Memory.ReadInt32(Mod0Offset + 0x8) + Mod0Offset;
long BssEndOffset = Memory.ReadInt32(Mod0Offset + 0xc) + Mod0Offset;
long EhHdrStartOffset = Memory.ReadInt32(Mod0Offset + 0x10) + Mod0Offset;
long EhHdrEndOffset = Memory.ReadInt32(Mod0Offset + 0x14) + Mod0Offset;
long ModObjOffset = Memory.ReadInt32(Mod0Offset + 0x18) + Mod0Offset;
MapBss(BssStartOffset, BssEndOffset - BssStartOffset);
ImageEnd = BssEndOffset;
while (true)
{
long TagVal = Memory.ReadInt64(DynamicOffset + 0);
long Value = Memory.ReadInt64(DynamicOffset + 8);
DynamicOffset += 0x10;
ElfDynTag Tag = (ElfDynTag)TagVal;
if (Tag == ElfDynTag.DT_NULL)
{
break;
}
Dynamic.Add(new ElfDyn(Tag, Value));
}
long StrTblAddr = ImageBase + GetFirstValue(ElfDynTag.DT_STRTAB);
long SymTblAddr = ImageBase + GetFirstValue(ElfDynTag.DT_SYMTAB);
long SymEntSize = GetFirstValue(ElfDynTag.DT_SYMENT);
while ((ulong)SymTblAddr < (ulong)StrTblAddr)
{
ElfSym Sym = GetSymbol(SymTblAddr, StrTblAddr);
m_SymbolTable.TryAdd(Sym.Value, Sym.Name);
SymTblAddr += SymEntSize;
}
}
