Date: Thu, 17 Feb 94 17:48:28 -0500
From: DJ Delorie <dj AT ctron DOT com>
To: joconnors AT cix DOT compulink DOT co DOT uk
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: djgpp & asm

>     I am trying to write assembler functions to be interfaced with optimized
> djgpp code & finding it a frustrating experience. The stack frame is simple
> to follow, but what registers to I need to save? Also, what labels need
> to be included in my code -- gnu_compiled_c ? gcc_compiled ? /APP /NO_APP ?
>
> What function do these labels serve?

Preserve ebx, esi, edi, ebp.  Those labels are for gdb and peephole
optimizers, so they can all be omitted.  Look at the .s examples in
the libsrc module if you like.