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MachO: Cache symbol table

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This commit is contained in:
Katy Coe
2020-12-21 06:37:45 +01:00
parent c00b474f33
commit 7141d7759a
1 changed files with 15 additions and 7 deletions
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22
Il2CppInspector.Common/FileFormatStreams/MachOReader.cs
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@@ -65,6 +65,7 @@ namespace Il2CppInspector
private MachOHeader<TWord> header; private MachOHeader<TWord> header;
protected readonly List<MachOSection<TWord>> machoSections = new List<MachOSection<TWord>>(); protected readonly List<MachOSection<TWord>> machoSections = new List<MachOSection<TWord>>();
private List<Section> sections = new List<Section>(); private List<Section> sections = new List<Section>();
private Dictionary<string, Symbol> symbolTable;
private MachOSection<TWord> funcTab; private MachOSection<TWord> funcTab;
private MachOSymtabCommand symTab; private MachOSymtabCommand symTab;
@@ -191,6 +192,10 @@ namespace Il2CppInspector
break; break;
} }
} }
// Build symbol table
processSymbols();
return true; return true;
} }
@@ -239,14 +244,14 @@ 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(); private void processSymbols() {
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 // 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 // n_sect: https://opensource.apple.com/source/cctools/cctools-795/include/mach-o/stab.h
StatusUpdate("Processing symbols");
symbolTable = new Dictionary<string, Symbol>();
var symbolList = ReadArray<MachO_nlist<TWord>>(symTab.SymOffset, (int) symTab.NumSyms); var symbolList = ReadArray<MachO_nlist<TWord>>(symTab.SymOffset, (int) symTab.NumSyms);
// This is a really naive implementation that ignores the values of n_type and n_sect // This is a really naive implementation that ignores the values of n_type and n_sect
@@ -281,11 +286,14 @@ namespace Il2CppInspector
} }
// Ignore duplicates // Ignore duplicates
symbols.TryAdd(name, new Symbol { Name = name, VirtualAddress = value, Type = type }); symbolTable.TryAdd(name, new Symbol { Name = name, VirtualAddress = value, Type = type });
} }
return symbols;
} }
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, Symbol> GetSymbolTable() => symbolTable;
public override IEnumerable<Export> GetExports() => exports; public override IEnumerable<Export> GetExports() => exports;
public override IEnumerable<Section> GetSections() => sections; public override IEnumerable<Section> GetSections() => sections;