[coreboot] issues with seabios on the m2a-vm
ward at gnu.org
Fri Feb 27 02:10:33 CET 2009
On Thu, Feb 26, 2009 at 07:38:56PM -0500, Kevin O'Connor wrote:
> On Thu, Feb 26, 2009 at 01:53:04PM -0500, Ward Vandewege wrote:
> > On Mon, Feb 23, 2009 at 09:06:01PM -0500, Kevin O'Connor wrote:
> > > Okay - I'm at a loss to explain what's going on. I wonder if there is
> > > a compiler bug. Can you place the out/rom16.o and out/rom32.o files
> > > somewhere where I can grab them? Also, the patch below will help with
> > > debugging.
> > Sure:
> > http://ward.vandewege.net/coreboot/m2a-vm/rom16.o
> > http://ward.vandewege.net/coreboot/m2a-vm/rom32.o
> Wow, this looks like a compiler bug. When disassembling I see:
> f1597: 58 popl %eax
> f1598: 85 ed testl %ebp,%ebp
> f159a: 7e 1c jle f15b8 <get_keystroke+0xe4>
> But, %ebp doesn't seem to be set before this point. Further, the
> 'msec' parameter should be %eax at the start of the fuction, but %eax
> is clobbered near the top of the function.
> What version of gcc are you using?
$ gcc --version
gcc (GCC) 4.2.4 (Ubuntu 4.2.4-1ubuntu3)
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
This is Hardy, 32 bit.
Ward Vandewege <ward at fsf.org>
Free Software Foundation - Senior Systems Administrator
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