copyargs
memcpy(copyargs, ap, nap * sizeof(register_t));
if ((error = copyin((void *)frame->tf_usr_sp, copyargs + nap,
args = copyargs;
register_t *ap, *args, copyargs[MAXARGS], rval[2];
if (!copyargs(&pack, &arginfo, stack, argp))
int copyargs(struct exec_package *, struct ps_strings *, void *, void *);