From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dan Cross <cross@math.psu.edu>
Message-Id: <200106211413.KAA16146@augusta.math.psu.edu>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] calling function with (variable number of) parameters
In-Reply-To: <20010620155421.A1669@gmx.net>
References: <20010620194218.96D3D199DD@mail.cse.psu.edu>
Cc: 
Date: Thu, 21 Jun 2001 10:13:57 -0400
Topicbox-Message-UUID: be93d45c-eac9-11e9-9e20-41e7f4b1d025

In article <20010620155421.A1669@gmx.net> you write:
>I've already tried to write it in assembler. The problem is that after the
>function returns, I don't know how many args I have to pop from the stack.
>And I can't get the number from a local variable, because I don't know the
>frame pointer anymore (I modified SP pushing the args before I called the
>function).

So save space for n + 1 parameters on the stack; the last won't be used
by your called function, and you could store the number of parameters in
it.  When you return, pop the last item off the stack, and use that to
recalculate the frame pointer.

	- Dan C.