# in order that the child can find the start func and its arg, we need to store it into
# non-volative regs. to do so, we have to store those 2 regs into our stackframe, so
# we can restore them later.
# in order that the child can find the start func and its arg, we need to store it into
# non-volative regs. to do so, we have to store those 2 regs into our stackframe, so
# we can restore them later.