Execution control during program code conversion

摘要

An execution control method is described for use in a translator ( 19 ) which converts subject code ( 17 ) into target code ( 21 ). The translator ( 19 ) includes a translator trampoline function ( 191 ) which is called from a translator run loop ( 190 ) and which in turn calls either to a translator code generator ( 192 ) to generate target code, or else calls previously generated target code ( 212 ) for execution. Control then returns to the translator trampoline function ( 191 ) to make a new call, or returns to the translator run loop ( 190 ). Other aspects include making context switches through the trampoline function ( 191 ) and setting first and second calling conventions either side of the trampoline function ( 191 ). Jumping directly or indirectly between target code blocks ( 212 ) during execution is also described.