Date: Sun, 11 Jan 1998 14:21:58 -0500 (EST)
Message-Id: <199801111921.OAA26021@delorie.com>
From: DJ Delorie <dj AT delorie DOT com>
To: djgpp-workers AT delorie DOT com
Subject: 8-byte stack alignment again
Precedence: bulk


I just thought of something.  Here's the crt0.s code:

        movw    %ds, %dx                /* set stack */
        movw    %dx, %ss
        andb    $0xf8, %eax             /* align to 8-byte boundary */
        movl    %eax, %esp

        xorl    %ebp, %ebp
        call    ___crt1_startup         /* run program */
        jmp     exit


Won't the call make the stack 4-byte aligned again?  I think it does,
which would make pgcc code run at *worst* case (always unaligned)!

Maybe we do need to fix this in crt1.c, or mis-align %esp in crt0.s to
accomodate the call.