private void EmitProtectedRegionTable()
{
var trace = CreateTraceLog("Regions");
var protectedRegionTableSymbol = MethodCompiler.Linker.DefineSymbol(Metadata.ProtectedRegionTable + MethodCompiler.Method.FullName, SectionKind.ROData, NativeAlignment, 0);
var writer = new EndianAwareBinaryWriter(protectedRegionTableSymbol.Stream, Architecture.Endianness);
int sectioncount = 0;
// 1. Number of Regions (filled in later)
writer.Write((uint)0);
foreach (var region in MethodCompiler.ProtectedRegions)
{
var handler = (uint)MethodCompiler.GetPosition(region.Handler.HandlerStart);
trace?.Log($"Handler: {region.Handler.TryStart.ToString("X4")} to {region.Handler.TryEnd.ToString("X4")} Handler: {region.Handler.HandlerStart.ToString("X4")} Offset: [{handler.ToString("X4")}]");
var sections = new List <Tuple <int, int> >();
foreach (var block in region.IncludedBlocks)
{
// Check if block continues to exist
if (!BasicBlocks.Contains(block))
{
continue;
}
int start = MethodCompiler.GetPosition(block.Label);
int end = MethodCompiler.GetPosition(block.Label + 0x0F000000);
trace?.Log($" Block: {block} [{start.ToString()}-{end.ToString()}]");
AddSection(sections, start, end);
}
foreach (var s in sections)
{
int start = s.Item1;
int end = s.Item2;
sectioncount++;
var name = Metadata.ProtectedRegionTable + MethodCompiler.Method.FullName + "$" + sectioncount.ToString();
var protectedRegionDefinition = CreateProtectedRegionDefinition(name, (uint)start, (uint)end, handler, region.Handler.ExceptionHandlerType, region.Handler.Type);
MethodCompiler.Linker.Link(LinkType.AbsoluteAddress, NativePatchType, protectedRegionTableSymbol, writer.Position, protectedRegionDefinition, 0);
writer.WriteZeroBytes(TypeLayout.NativePointerSize);
trace?.Log($" Section: [{start.ToString()}-{end.ToString()}]");
}
}
// 1. Number of Regions (now put the real number)
writer.Position = 0;
writer.Write(sectioncount);
}