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Diffstat (limited to 'Ryujinx.Core/Loaders/Executable.cs')
| -rw-r--r-- | Ryujinx.Core/Loaders/Executable.cs | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/Ryujinx.Core/Loaders/Executable.cs b/Ryujinx.Core/Loaders/Executable.cs new file mode 100644 index 00000000..6a6073ef --- /dev/null +++ b/Ryujinx.Core/Loaders/Executable.cs @@ -0,0 +1,149 @@ +using ChocolArm64.Memory; +using Ryujinx.Core.Loaders.Executables; +using Ryujinx.Core.OsHle; +using System.Collections.Generic; + +namespace Ryujinx.Core.Loaders +{ + class Executable + { + private AMemory Memory; + + private ElfDyn[] Dynamic; + + public long ImageBase { get; private set; } + public long ImageEnd { get; private set; } + + public Executable(IExecutable Exe, AMemory Memory, long ImageBase) + { + 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.Normal, AMemoryPerm.Read); + WriteData(ImageBase + Exe.DataOffset, Exe.Data, MemoryType.Normal, AMemoryPerm.RW); + + if (Exe.Mod0Offset == 0) + { + MapBss(ImageBase + Exe.DataOffset + Exe.Data.Count, Exe.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; + + List<ElfDyn> Dynamic = new List<ElfDyn>(); + + 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)); + } + + this.Dynamic = Dynamic.ToArray(); + } + + private void WriteData( + long Position, + IList<byte> Data, + MemoryType Type, + AMemoryPerm Perm) + { + Memory.Manager.MapPhys(Position, Data.Count, (int)Type, AMemoryPerm.Write); + + for (int Index = 0; Index < Data.Count; Index++) + { + Memory.WriteByte(Position + Index, Data[Index]); + } + + Memory.Manager.Reprotect(Position, Data.Count, Perm); + } + + private void MapBss(long Position, long Size) + { + Memory.Manager.MapPhys(Position, Size, (int)MemoryType.Normal, AMemoryPerm.RW); + } + + 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); + } + + private ElfSym GetSymbol(int Index) + { + long StrTblAddr = ImageBase + GetFirstValue(ElfDynTag.DT_STRTAB); + long SymTblAddr = ImageBase + GetFirstValue(ElfDynTag.DT_SYMTAB); + + long SymEntSize = GetFirstValue(ElfDynTag.DT_SYMENT); + + long Position = SymTblAddr + Index * SymEntSize; + + return GetSymbol(Position, StrTblAddr); + } + + private ElfSym GetSymbol(long Position, long StrTblAddr) + { + int NameIndex = Memory.ReadInt32(Position + 0); + int Info = Memory.ReadByte(Position + 4); + int Other = Memory.ReadByte(Position + 5); + int SHIdx = Memory.ReadInt16(Position + 6); + long Value = Memory.ReadInt64(Position + 8); + long Size = Memory.ReadInt64(Position + 16); + + string Name = string.Empty; + + for (int Chr; (Chr = Memory.ReadByte(StrTblAddr + NameIndex++)) != 0;) + { + Name += (char)Chr; + } + + return new ElfSym(Name, Info, Other, SHIdx, ImageBase, Value, Size); + } + + private long GetFirstValue(ElfDynTag Tag) + { + foreach (ElfDyn Entry in Dynamic) + { + if (Entry.Tag == Tag) + { + return Entry.Value; + } + } + + return 0; + } + } +}
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