mirror of
https://github.com/GreemDev/Ryujinx.git
synced 2024-12-24 19:05:46 +00:00
173 lines
No EOL
5.5 KiB
C#
173 lines
No EOL
5.5 KiB
C#
using ChocolArm64.Memory;
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using Ryujinx.HLE.Loaders.Executables;
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using Ryujinx.HLE.OsHle;
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using System.Collections.Generic;
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namespace Ryujinx.HLE.Loaders
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{
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class Executable
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{
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private List<ElfDyn> Dynamic;
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private Dictionary<long, string> m_SymbolTable;
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public IReadOnlyDictionary<long, string> SymbolTable => m_SymbolTable;
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public string Name { get; private set; }
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private AMemory Memory;
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public long ImageBase { get; private set; }
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public long ImageEnd { get; private set; }
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public Executable(IExecutable Exe, AMemory Memory, long ImageBase)
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{
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Dynamic = new List<ElfDyn>();
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m_SymbolTable = new Dictionary<long, string>();
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Name = Exe.Name;
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this.Memory = Memory;
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this.ImageBase = ImageBase;
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this.ImageEnd = ImageBase;
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WriteData(ImageBase + Exe.TextOffset, Exe.Text, MemoryType.CodeStatic, AMemoryPerm.RX);
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WriteData(ImageBase + Exe.ROOffset, Exe.RO, MemoryType.CodeMutable, AMemoryPerm.Read);
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WriteData(ImageBase + Exe.DataOffset, Exe.Data, MemoryType.CodeMutable, AMemoryPerm.RW);
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if (Exe.Mod0Offset == 0)
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{
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int BssOffset = Exe.DataOffset + Exe.Data.Length;
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int BssSize = Exe.BssSize;
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MapBss(ImageBase + BssOffset, BssSize);
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ImageEnd = ImageBase + BssOffset + BssSize;
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return;
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}
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long Mod0Offset = ImageBase + Exe.Mod0Offset;
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int Mod0Magic = Memory.ReadInt32(Mod0Offset + 0x0);
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long DynamicOffset = Memory.ReadInt32(Mod0Offset + 0x4) + Mod0Offset;
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long BssStartOffset = Memory.ReadInt32(Mod0Offset + 0x8) + Mod0Offset;
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long BssEndOffset = Memory.ReadInt32(Mod0Offset + 0xc) + Mod0Offset;
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long EhHdrStartOffset = Memory.ReadInt32(Mod0Offset + 0x10) + Mod0Offset;
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long EhHdrEndOffset = Memory.ReadInt32(Mod0Offset + 0x14) + Mod0Offset;
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long ModObjOffset = Memory.ReadInt32(Mod0Offset + 0x18) + Mod0Offset;
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MapBss(BssStartOffset, BssEndOffset - BssStartOffset);
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ImageEnd = BssEndOffset;
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while (true)
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{
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long TagVal = Memory.ReadInt64(DynamicOffset + 0);
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long Value = Memory.ReadInt64(DynamicOffset + 8);
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DynamicOffset += 0x10;
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ElfDynTag Tag = (ElfDynTag)TagVal;
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if (Tag == ElfDynTag.DT_NULL)
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{
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break;
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}
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Dynamic.Add(new ElfDyn(Tag, Value));
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}
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long StrTblAddr = ImageBase + GetFirstValue(ElfDynTag.DT_STRTAB);
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long SymTblAddr = ImageBase + GetFirstValue(ElfDynTag.DT_SYMTAB);
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long SymEntSize = GetFirstValue(ElfDynTag.DT_SYMENT);
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while ((ulong)SymTblAddr < (ulong)StrTblAddr)
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{
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ElfSym Sym = GetSymbol(SymTblAddr, StrTblAddr);
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m_SymbolTable.TryAdd(Sym.Value, Sym.Name);
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SymTblAddr += SymEntSize;
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}
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}
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private void WriteData(
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long Position,
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byte[] Data,
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MemoryType Type,
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AMemoryPerm Perm)
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{
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Memory.Manager.Map(Position, Data.Length, (int)Type, AMemoryPerm.Write);
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Memory.WriteBytes(Position, Data);
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Memory.Manager.Reprotect(Position, Data.Length, Perm);
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}
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private void MapBss(long Position, long Size)
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{
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Memory.Manager.Map(Position, Size, (int)MemoryType.Normal, AMemoryPerm.RW);
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}
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private ElfRel GetRelocation(long Position)
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{
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long Offset = Memory.ReadInt64(Position + 0);
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long Info = Memory.ReadInt64(Position + 8);
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long Addend = Memory.ReadInt64(Position + 16);
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int RelType = (int)(Info >> 0);
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int SymIdx = (int)(Info >> 32);
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ElfSym Symbol = GetSymbol(SymIdx);
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return new ElfRel(Offset, Addend, Symbol, (ElfRelType)RelType);
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}
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private ElfSym GetSymbol(int Index)
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{
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long StrTblAddr = ImageBase + GetFirstValue(ElfDynTag.DT_STRTAB);
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long SymTblAddr = ImageBase + GetFirstValue(ElfDynTag.DT_SYMTAB);
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long SymEntSize = GetFirstValue(ElfDynTag.DT_SYMENT);
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long Position = SymTblAddr + Index * SymEntSize;
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return GetSymbol(Position, StrTblAddr);
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}
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private ElfSym GetSymbol(long Position, long StrTblAddr)
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{
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int NameIndex = Memory.ReadInt32(Position + 0);
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int Info = Memory.ReadByte(Position + 4);
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int Other = Memory.ReadByte(Position + 5);
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int SHIdx = Memory.ReadInt16(Position + 6);
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long Value = Memory.ReadInt64(Position + 8);
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long Size = Memory.ReadInt64(Position + 16);
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string Name = string.Empty;
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for (int Chr; (Chr = Memory.ReadByte(StrTblAddr + NameIndex++)) != 0;)
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{
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Name += (char)Chr;
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}
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return new ElfSym(Name, Info, Other, SHIdx, Value, Size);
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}
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private long GetFirstValue(ElfDynTag Tag)
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{
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foreach (ElfDyn Entry in Dynamic)
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{
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if (Entry.Tag == Tag)
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{
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return Entry.Value;
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}
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}
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return 0;
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}
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}
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} |