Exemplo n.º 1
0
        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));
        }
Exemplo n.º 2
0
        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;
            }
        }