Date: Tue, 8 Jul 1997 10:11:53 -0700 (PDT)
Message-Id: <199707081711.KAA26906@adit.ap.net>
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To: djgpp AT delorie DOT com
From: Nate Eldredge <eldredge AT ap DOT net>
Subject: Re: Djgpp and Asm
Precedence: bulk

John Conner wrote:
>Ok, heres what I'm trying to do.
>
>asm("leal _RAM,%ebp");    /* RAM is a c pointer */
>
>It crashes every time. I get a gpf or stack fault. 
>It works fine if I use esi,edi,ect. Any help?
ebp is the frame pointer in C. It's used to address things on the stack
(args, local variables, etc). Choices you have:
- Tell GCC you trashed it. See the Extended Asm section of the GCC docs.
- Save and restore it yourself.
- Use a different register.

HTH

Nate Eldredge
eldredge AT ap DOT net