/ / PDP-11 C. / Standard Library. / / Entry and exit operators. / .globl _save .globl _ret _save: mov r5,(sp) mov r4,-(sp) mov r3,-(sp) mov r2,-(sp) mov sp,r5 jsr pc,(r0) /tst -(sp) jmp (r0) _ret: mov r5,sp mov (sp)+,r2 mov (sp)+,r3 mov (sp)+,r4 mov (sp)+,r5 return