16b56e271b
Fix fieldOffsets bug in some metadata versions Add support for generic multi-architecture binaries Add Mach-O section RVA mapping
86 lines
3.7 KiB
C#
86 lines
3.7 KiB
C#
/*
|
|
Copyright 2017 Perfare - https://github.com/Perfare/Il2CppDumper
|
|
Copyright 2017 Katy Coe - http://www.hearthcode.org - http://www.djkaty.com
|
|
|
|
All rights reserved.
|
|
*/
|
|
|
|
using System.Linq;
|
|
|
|
namespace Il2CppInspector
|
|
{
|
|
internal class Il2CppReaderARM : Il2CppReader
|
|
{
|
|
public Il2CppReaderARM(IFileFormatReader stream) : base(stream) { }
|
|
|
|
public Il2CppReaderARM(IFileFormatReader stream, uint codeRegistration, uint metadataRegistration) : base(stream, codeRegistration, metadataRegistration) { }
|
|
|
|
protected override (uint, uint) Search(uint loc, uint globalOffset) {
|
|
// Assembly bytes to search for at start of each function
|
|
uint metadataRegistration, codeRegistration;
|
|
|
|
// ARMv7
|
|
var bytes = new byte[] { 0x1c, 0x0, 0x9f, 0xe5, 0x1c, 0x10, 0x9f, 0xe5, 0x1c, 0x20, 0x9f, 0xe5 };
|
|
Image.Position = loc;
|
|
var buff = Image.ReadBytes(12);
|
|
if (bytes.SequenceEqual(buff)) {
|
|
Image.Position = loc + 0x2c;
|
|
var subaddr = Image.ReadUInt32() + globalOffset;
|
|
Image.Position = subaddr + 0x28;
|
|
codeRegistration = Image.ReadUInt32() + globalOffset;
|
|
Image.Position = subaddr + 0x2C;
|
|
var ptr = Image.ReadUInt32() + globalOffset;
|
|
Image.Position = Image.MapVATR(ptr);
|
|
metadataRegistration = Image.ReadUInt32();
|
|
return (codeRegistration, metadataRegistration);
|
|
}
|
|
|
|
// ARMv7 metadata v23
|
|
Image.Position = loc;
|
|
|
|
// Check for ADD Rx, PC in relevant parts of function
|
|
var func = Image.ReadBytes(0x20);
|
|
if (func[0x0C] == 0x79 && func[0x0D] == 0x44 && // ADD R1, PC
|
|
func[0x16] == 0x78 && func[0x17] == 0x44 && // ADD R0, PC
|
|
func[0x1E] == 0x7A && func[0x1F] == 0x44) // ADD R2, PC
|
|
{
|
|
// Follow path to metadata pointer
|
|
var ppMetadata = decodeMovImm32(func) + loc + 0x10;
|
|
Image.Position = ppMetadata;
|
|
metadataRegistration = Image.ReadUInt32();
|
|
|
|
// Follow path to code pointer
|
|
var pCode = decodeMovImm32(func.Skip(8).Take(4).Concat(func.Skip(14).Take(4)).ToArray());
|
|
codeRegistration = pCode + loc + 0x1A + globalOffset;
|
|
|
|
return (codeRegistration, metadataRegistration);
|
|
}
|
|
|
|
// ARMv7 Thumb (T1)
|
|
// http://liris.cnrs.fr/~mmrissa/lib/exe/fetch.php?media=armv7-a-r-manual.pdf - A8.8.106
|
|
// http://armconverter.com/hextoarm/
|
|
bytes = new byte[] { 0x2d, 0xe9, 0x00, 0x48, 0xeb, 0x46 };
|
|
Image.Position = loc;
|
|
buff = Image.ReadBytes(6);
|
|
if (!bytes.SequenceEqual(buff))
|
|
return (0, 0);
|
|
bytes = new byte[] { 0x00, 0x23, 0x00, 0x22, 0xbd, 0xe8, 0x00, 0x48 };
|
|
Image.Position += 0x10;
|
|
buff = Image.ReadBytes(8);
|
|
if (!bytes.SequenceEqual(buff))
|
|
return (0, 0);
|
|
Image.Position = loc + 6;
|
|
Image.Position = (Image.MapVATR(decodeMovImm32(Image.ReadBytes(8))) & 0xfffffffc) + 0x0e;
|
|
metadataRegistration = decodeMovImm32(Image.ReadBytes(8));
|
|
codeRegistration = decodeMovImm32(Image.ReadBytes(8));
|
|
return (codeRegistration, metadataRegistration);
|
|
}
|
|
|
|
private uint decodeMovImm32(byte[] asm) {
|
|
ushort low = (ushort) (asm[2] + ((asm[3] & 0x70) << 4) + ((asm[1] & 0x04) << 9) + ((asm[0] & 0x0f) << 12));
|
|
ushort high = (ushort) (asm[6] + ((asm[7] & 0x70) << 4) + ((asm[5] & 0x04) << 9) + ((asm[4] & 0x0f) << 12));
|
|
return (uint) ((high << 16) + low);
|
|
}
|
|
}
|
|
}
|