private Dictionary<Symbol, AssembledSegment> symbolSegments; // The segment to which a symbol belongs.
public X86Assembler(IntelArchitecture arch, Address addrBase, List<EntryPoint> entryPoints)
{
this.arch = arch;
this.Platform = new MsdosPlatform(null, arch);
this.addrBase = addrBase;
this.entryPoints = entryPoints;
this.defaultWordSize = arch.WordWidth;
this.textEncoding = Encoding.GetEncoding("ISO_8859-1");
symtab = new SymbolTable();
importReferences = new Dictionary<Address, ImportReference>();
segments = new List<AssembledSegment>();
mpNameToSegment = new Dictionary<string, AssembledSegment>();
symbolSegments = new Dictionary<Symbol, AssembledSegment>();
this.SegmentOverride = RegisterStorage.None;
unknownSegment = new AssembledSegment(new Emitter(), symtab.DefineSymbol("", 0));
segments.Add(unknownSegment);
SwitchSegment(unknownSegment);
SetDefaultWordWidth(defaultWordSize);
}
private void SwitchSegment(AssembledSegment unknownSegment)
{
currentSegment = unknownSegment;
emitter = unknownSegment.Emitter;
modRm = new ModRmBuilder(defaultWordSize, emitter);
}
private AssembledSegment GetSymbolSegmentReference(Symbol sym)
{
AssembledSegment seg;
if (symbolSegments.TryGetValue(sym, out seg))
return seg;
seg = new AssembledSegment(emitter, null);
symbolSegments.Add(sym, seg);
return seg;
}
public void Segment(string segmentName)
{
AssembledSegment seg;
if (!mpNameToSegment.TryGetValue(segmentName, out seg))
{
var sym = symtab.DefineSymbol(segmentName, 0);
seg = new AssembledSegment(new Emitter(), sym);
segments.Add(seg);
}
SwitchSegment(seg);
}