Date: Thu, 09 Aug 2001 11:12:25 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: Harti Brandt <brandt@fokus.gmd.de> Cc: current@FreeBSD.org, net@FreeBSD.org, obrien@FreeBSD.org Subject: RE: Problem with pxeboot and binutils-2.11 Message-ID: <XFMail.010809111225.jhb@FreeBSD.org> In-Reply-To: <20010809163526.P49083-100000@beagle.fokus.gmd.de>
next in thread | previous in thread | raw e-mail | index | archive | help
On 09-Aug-01 Harti Brandt wrote: > > Hello, > > some time ago we reported a problem with pxeboot under -current (see below). > We have tried to track down the problem and it seems to be a bug or a > feature in gas or libbfd. It turns out, that the output from pxeldr before > the binutils-2.11 import on 5/29/2001 was 500 bytes long. After the import > the output has grown to 512 byte. The excess bytes contain a jump to the > address 512 and a number of NOPs. The result of this is, that the loader > image which is located imediately after pxeldr is shifted by 12 bytes > and the address calculations in pxeldr.s are wrong now. > > Unfortunately we're not able to find out what new bug^h^h^hfeature of > gas or libbfd causes this behaviour. A simple workaround is to strip the > excess bytes from pxeldr just before building pxeboot, but that is REALLY > ugly: It is evil. Looks like it is aligning the end of the text even though I haven't asked. A grotty hack would be to use a org at the end to force pxeldr to be 512 bytes. Try this: --- pxeldr.s 2001/02/06 11:20:05 1.6 +++ pxeldr.s 2001/08/09 17:41:38 @@ -277,5 +277,6 @@ bootinfo_msg: .asciz "Building the boot loader arguments\r\n" relocate_msg: .asciz "Relocating the loader and the BTX\r\n" jump_message: .asciz "Starting the BTX loader\r\n" - + + .org 0x200,0x0 end: -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?XFMail.010809111225.jhb>