Thanx, this paper is helpful and shows what I expected. But I still have a problem about va-argument-passing. The MS compiler reserves stack space for all may va-callable methods register arguments. So far, good. This means for GCC setting up REG_PARM_STACK_SPACE to the value of a stack argument (8 bytes). But MS saves also space for all may argument registers on stack, not just for the used one - as gcc does. So is there allready a mechanism in gcc, by whom I can reserve for all methods simple space on stack for the 4 used register parameters, even if they are not used for argument passing ?
Regards, i.A. Kai Tietz
