question: private static byte [ ] generateBinaries ( PseudoBytecode bhead , int bsize ) { byte [ ] codes = new byte [ bsize ] ; PseudoBytecode bcode = bhead . next ; int pos = 0 ; while ( bcode != null ) { int size = bcode . getSize ( ) ; if ( bcode instanceof LoadRetAddrConst ) { LoadRetAddrConst laddr = ( LoadRetAddrConst ) bcode ; laddr . patch ( laddr . getOffset ( ) + bsize ) ; } if ( VM . TraceOnStackReplacement ) VM . sysWriteln ( pos + " : " + bcode . toString ( ) ) ; System . arraycopy ( bcode . getBytes ( ) , 0 , codes , pos , size ) ; pos += size ; bcode = bcode . next ; } return codes ; }
target:  Generating binary code from pseudo code, the size and the code list are padded and well calculated.