private static void EmitTest(Instruction instruction, string assembler)
{
var actual = new List <byte>();
Assert.Null(InstructionEmitter.Emit(instruction, actual));
var expected = TestHelpers.NasmBuildBinFromString($"bits 64\r\n{assembler}");
TestHelpers.AssertByteArrays(expected, actual, $"Assembling `{assembler}`:\r\n");
}
public string Assemble(AstNode node)
{
switch (node)
{
case AssemblyListing listing:
foreach (var directive in listing.Directives)
{
var err = Assemble(directive);
if (err != null)
{
return(err);
}
}
return(null);
case ExternDeclaration externDeclaration:
_symbolTable.Import(externDeclaration.Name);
return(null);
case GlobalDeclaration globalDeclaration:
_symbolTable.Export(globalDeclaration.Name);
return(null);
case SectionDeclaration sectionDeclaration:
foreach (var entry in sectionDeclaration.SectionEntries)
{
var error = Assemble(entry);
if (error != null)
{
return(error);
}
}
return(null);
case Instruction instruction:
return(InstructionEmitter.Emit(instruction, _data));
case Data data:
case SectionLabel label:
return(null);
default:
return($"unsupported AstNode: {node.GetType()}");
}
}