fix the initial jump

lib/arm/passes/main_implementation.rb

@@ -1,6 +1,8 @@
 module Arm
 
   # "Boot" the register machine at the function given
+  # meaning jump to that function currently. Maybe better to do some machine setup
+  # and possibly some cleanup/exit has to tie in, but that is not this day
 
   class MainImplementation
     def run block

lib/register/assembler.rb

@@ -28,7 +28,10 @@ module Register
         # should be fill_to_length (with zeros)
         objekt.code.set_length(objekt.info.byte_length , 0)
       end
-      at = 0
+      #need the initial jump at 0 and then functions
+      @machine.init.set_position(0)
+      at = @machine.init.byte_length
+
       # then we make sure we really get the binary codes first
       @machine.objects.each do |objekt|
         next unless objekt.is_a? Parfait::BinaryCode
@@ -65,11 +68,10 @@ module Register
           assemble_binary_method(objekt)
         end
         @stream = StringIO.new
-        #TODOmid , main = @objects.find{|k,objekt| objekt.is_a?(Virtual::CompiledMethod) and (objekt.name == :__init__ )}
-#        initial_jump = @machine.init
-#        initial_jump.codes.each do |code|
-#          code.assemble( @stream )
-#        end
+        @machine.init.codes.each do |code|
+          code.assemble( @stream )
+        end
+
         # then write the methods to file
         @machine.objects.each do |objekt|
           next unless objekt.is_a? Parfait::BinaryCode

lib/register/instructions/register_main.rb

@@ -1,14 +1,19 @@
 module Register
 
   # This starts the register machine machine at the given function.
-  
+
   # The implementation is most likely a jump/branch , but since we have the extra layer
   # we make good use of it, ie give things descriptive names (what they do, not how)
 
   class RegisterMain < Instruction
+    include Positioned
+
     def initialize method
       @method = method
     end
     attr_reader :method
+    def word_length
+      4
+    end
   end
-end
+end

lib/virtual/boot.rb

@@ -113,10 +113,6 @@ module Virtual
         obj.add_instance_method Builtin::Integer.send(f , nil)
       end
 
-      # and the @init block in turn _jumps_ to __init__
-      # the point of which is that by the time main executes, all is :normal:
-      @init = Block.new(:_init_ , nil )
-      @init.add_code(Register::RegisterMain.new(underscore_init))
     end
   end
 end

lib/virtual/machine.rb

@@ -44,6 +44,8 @@ module Virtual
     attr_reader  :passes , :space , :class_mappings , :init , :objects
 
     def run_passes
+      @init = Block.new("init",nil)
+      @init.add_code  Register::RegisterMain.new( self.space.get_main )
       Minimizer.new.run
       Collector.new.run
       @passes.each do |pass_class|
@@ -51,12 +53,12 @@ module Virtual
         @space.classes.values.each do |c|
           c.instance_methods.each do |f|
             nb = f.info.blocks
-            raise "nil blocks " unless nb
             blocks += nb
           end
         end
         #puts "running #{pass_class}"
         blocks.each do |block|
+          raise "nil block " unless block
           pass = eval pass_class
           raise "no such pass-class as #{pass_class}" unless pass
           pass.new.run(block)