finish syscall

works, even had to fix parfait bug to see

lib/arm/passes/syscall_implementation.rb

@@ -4,13 +4,14 @@ module Arm
     def run block
       block.codes.dup.each do |code|
         next unless code.is_a? Register::Syscall
-        new_codes = []
-        load = ArmMachine.ldr( :r1 ,  code.constant )
-
-        store = ArmMachine.str( code.register ,  code.array , code.index )
+        raise "uups" unless code.name == :putstring
+        new_codes = [ ArmMachine.mov( :r1 ,  20 ) ]
+        new_codes << ArmMachine.ldr( :r0 , Virtual::Slot::MESSAGE_REGISTER, Virtual::SELF_INDEX)
+        new_codes << ArmMachine.mov( :r7 ,  4 )
+        new_codes << ArmMachine.swi( 0 )
         block.replace(code , new_codes )
       end
     end
   end
-  Virtual.machine.add_pass "Arm::SetImplementation"
+  Virtual.machine.add_pass "Arm::SyscallImplementation"
 end