Date: Mon, 23 Apr 2007 12:23:09 -0700 From: Bakul Shah <bakul@bitblocks.com> To: Eric Anderson <anderson@freebsd.org> Cc: freebsd-emulation@freebsd.org Subject: Re: experimental qemu-devel port update, please test! Message-ID: <20070423192309.E77F65B3B@mail.bitblocks.com> In-Reply-To: Your message of "Sat, 21 Apr 2007 23:02:14 CDT." <462ADE46.3080304@freebsd.org>
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> >> I found and fixed one bug in src/core/osloader.c (in
> >> etherboot-5.4.3 code) which allows me to get a little bit
> >> further. If anyone wants to play with this more, I can send
> >> them my changes.
> >
> > You may want to post those on the qemu list...
>
> On this list too, since I'm not subscribed to the qemu list (nor are
> many people on this list I'm guessing).
The change I am talking about is in etherboot-5.4.3 code, not
in qemu. I tried upgrading ports/net/etherboot 5.4.3 but my
effort is not in a usable state right now.
Download etherboot-5.4.3.tar.bz2, untar it, cd to its top dir
and apply the following patch -- this is the only critical
change. And I borrowed other changes from the current
net/etherboot port.
If you can compile rtl8139.zrom fine, run qemu with
an explicit -option-rom argument and make sure you use
model=rtl8139.
it will use dhcp to get an address, load freebsd's
pxeboot and jump to it at which point everything halts.
May be etherboot does too much. Since freebsd does pxeboot
on a real machine, ideally the exact same pxeboot should work
with etherboot.
--- src/core/osloader.c.orig Sat Feb 24 06:44:59 2007
+++ src/core/osloader.c Sat Apr 21 21:50:37 2007
@@ -344,6 +344,8 @@
}
#endif /* defined(ELF_IMAGE) && defined(IMAGE_MULTIBOOT) */
+ if (!len) goto done;
+
/* Either len is greater or the skip is greater */
if ((skip_sectors > (len >> 9)) ||
((skip_sectors == (len >> 9)) && (skip_bytes >= (len & 0x1ff)))) {
@@ -355,6 +357,7 @@
skip_bytes -= len;
}
else {
+ done:
len -= (skip_sectors << 9) + skip_bytes;
data += (skip_sectors << 9) + skip_bytes;
skip_sectors = os_download(data, len, eof);
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