chizui/Il2CppInspectorRedux
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Unify symbol table format and implement for Elf and Mach-O

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This commit is contained in:
Katy Coe
2020-08-09 00:30:18 +02:00
parent e536a3b1eb
commit 00c2e8ad44
7 changed files with 127 additions and 21 deletions
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35
Il2CppInspector.Common/FileFormatReaders/MachOReader.cs
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@@ -6,6 +6,7 @@
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using NoisyCowStudios.Bin2Object;
@@ -228,8 +229,8 @@ namespace Il2CppInspector
public override uint[] GetFunctionTable() => ReadArray<TWord>(funcTab.ImageOffset, conv.Int(funcTab.Size) / (Bits / 8)).Select(x => MapVATR(conv.ULong(x)) & 0xffff_fffe).ToArray();
public override Dictionary<string, ulong> GetSymbolTable() {
var symbols = new Dictionary<string, ulong>();
public override Dictionary<string, Symbol> GetSymbolTable() {
var symbols = new Dictionary<string, Symbol>();
// https://opensource.apple.com/source/cctools/cctools-795/include/mach-o/nlist.h
// n_sect: https://opensource.apple.com/source/cctools/cctools-795/include/mach-o/stab.h
@@ -243,11 +244,33 @@ namespace Il2CppInspector
var name = (symbol.n_strx != 0) ? ReadNullTerminatedString() : "";
var value = (ulong) Convert.ChangeType(symbol.n_value, typeof(ulong));
// Ignore duplicates for now, also ignore symbols with no address
if (value != 0)
symbols.TryAdd(name, value);
}
// Ignore symbols with no address or name
if (value == 0 || name.Length == 0)
continue;
// Mask out the N_EXT and N_PEXT bits because we don't care about it
var ntype = (MachO_NType) ((byte)symbol.n_type & ~(byte)MachO_NType.N_EXT & ~(byte)MachO_NType.N_PEXT);
// For non-debugging symbols (no bits of N_STAB set), just leave the N_TYPE
// Otherwise leave the whole n_type field (with N_EXT and N_PEXT removed)
var dbg = (symbol.n_type & MachO_NType.N_STAB) != 0;
if (dbg)
if (ntype == MachO_NType.N_BNSYM || ntype == MachO_NType.N_ENSYM
|| ntype == MachO_NType.N_SO || ntype == MachO_NType.N_OSO)
continue;
var type = ntype == MachO_NType.N_FUN? SymbolType.Function
: ntype == MachO_NType.N_STSYM || ntype == MachO_NType.N_GSYM || ntype == MachO_NType.N_SECT? SymbolType.Name
: SymbolType.Unknown;
if (type == SymbolType.Unknown) {
Console.WriteLine($"Unknown symbol type: {((int) ntype):x2} {value:x16} " + CxxDemangler.CxxDemangler.Demangle(name));
}
// Ignore duplicates
symbols.TryAdd(name, new Symbol { Name = name, VirtualAddress = value, Type = type });
}
return symbols;
}