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Handle 64-bit Mach-O virtual address mapping correctly

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This commit is contained in:
Katy Coe
2019-10-22 22:35:20 +02:00
parent 490736f68e
commit 8299414fba
1 changed files with 11 additions and 8 deletions
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19
Il2CppInspector/FileFormatReaders/MachOReader.cs
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@@ -23,6 +23,11 @@ namespace Il2CppInspector
protected override bool checkMagicBE(MachO magic) => magic == MachO.MH_CIGAM;
protected override MachO lc_Segment => MachO.LC_SEGMENT;
public override uint MapVATR(ulong uiAddr) {
var section = sections.First(x => uiAddr >= x.Address && uiAddr <= x.Address + x.Size);
return (uint) uiAddr - (section.Address - section.ImageOffset);
}
}
internal class MachOReader64 : MachOReader<ulong, MachOReader64>
@@ -35,6 +40,10 @@ namespace Il2CppInspector
protected override bool checkMagicBE(MachO magic) => magic == MachO.MH_CIGAM_64;
protected override MachO lc_Segment => MachO.LC_SEGMENT_64;
public override uint MapVATR(ulong uiAddr) {
var section = sections.First(x => uiAddr >= x.Address && uiAddr <= x.Address + x.Size);
return (uint) (uiAddr - (section.Address - section.ImageOffset));
}
}
// We need this convoluted generic TReader declaration so that "static T FileFormatReader.Load(Stream)"
@@ -42,7 +51,7 @@ namespace Il2CppInspector
internal abstract class MachOReader<TWord, TReader> : FileFormatReader<TReader> where TWord : struct where TReader : FileFormatReader<TReader>
{
private MachOHeader<TWord> header;
private readonly List<MachOSection<TWord>> sections = new List<MachOSection<TWord>>();
protected readonly List<MachOSection<TWord>> sections = new List<MachOSection<TWord>>();
private MachOLinkEditDataCommand funcTab;
private MachOSymtabCommand symTab;
@@ -94,8 +103,7 @@ namespace Il2CppInspector
var section = ReadObject<MachOSection<TWord>>();
sections.Add(section);
if (section.Name == "__text") {
GlobalOffset = (ulong) Convert.ChangeType(section.Address, typeof(ulong)) -
section.ImageOffset;
GlobalOffset = (ulong) Convert.ChangeType(section.Address, typeof(ulong)) - section.ImageOffset;
}
}
}
@@ -171,10 +179,5 @@ namespace Il2CppInspector
}
return symbols;
}
public override uint MapVATR(ulong uiAddr) {
var section = sections.First(x => uiAddr >= (uint)(object)x.Address && uiAddr <= (uint)(object)x.Address + (uint)(object)x.Size);
return (uint) (uiAddr - ((ulong) Convert.ChangeType(section.Address, typeof(ulong)) - section.ImageOffset));
}
}
}