MUTUAL CALLING BETWEEN NATIVE AND NONNATIVE INSTRUCTION SETS

摘要

PROBLEM TO BE SOLVED: To provide a data processing system 118 for supporting the execution of both of native instructions using a processor core and nonnative instructions interpreted by using a hardware translation part 122 or a software interpreter. SOLUTION: In order to terminate a sub routine for achieving internal calling between native and nonnative codes by reducing processing overheads, a clear return to the nonnative instruction and a return to the native instruction are separately provided. A nonnative sub routine for veneer is used between the native code and a nonnative main sub routine. A nonnative sub routine for the veneer is dynamically formed inside the stack memory area of a native mode system.