Spike White
2014-Mar-14 23:30 UTC
[syslinux] syslinux.efi [PXELINUX EFI 64 boot] not properly TFTP'ing ldlinux.e64
H Peter, I notice the Intel Boot Agent (in the BOOT ROM) takes a different approach. When TFTP loading the initial syslinux.efi. It receives the OACK with both options set -- tsize (of 145744) and blksize (of 1408). Apparently it has challenges parsing this "two option" OACK packet. But it remembers the tsize of 145744. So it issues another read request, this time requesting only a blksize option. Then it gets back an OACK with only one option (the blksize of 1408). Apparently it correctly parse this, because then the data transfer of syslinux.efi ensues. Not quite as efficient, but it works. It was 6.02 syslinux that was exhibiting this "two-option" confusion; 6.03-pre6 pre-compiled binaries load fine. So I'm good, prefer not to further analyze 6.02 quirks. BTW, I did try disallowing each option separately and also both options. I tried both tftp-hpa and atftpd, so I forget on which one I did the disabling. No love -- on 6.02. 6.03-pre6 is good w/ no disabling required. Spike> From: "H. Peter Anvin" <hpa at zytor.com> > To: For discussion of Syslinux and tftp-hpa <syslinux at zytor.com> > Subject: Re: [syslinux] syslinux.efi [PXELINUX EFI 64 boot] not > properly TFTP'ing ldlinux.e64 > Message-ID: <532325F0.6040103 at zytor.com> > Content-Type: text/plain; charset=ISO-8859-1 > > On 03/10/2014 08:00 PM, Spike White wrote: > > > > What seems to confuse it is that it gets back both acknowledgements inthe> > same TFTP option acknowledgement packet. That is, the TFTP server'soption> > acknowledgement packet has tsize option acknowledgement (tsize = 145744) > > and also blksize option acknowledgement (blksize = 1408).
Gene Cumm
2014-Mar-14 23:46 UTC
[syslinux] syslinux.efi [PXELINUX EFI 64 boot] not properly TFTP'ing ldlinux.e64
On Fri, Mar 14, 2014 at 7:30 PM, Spike White <spikewhitetx at gmail.com> wrote:> No love -- on 6.02. 6.03-pre6 is good w/ no disabling required.6.02 has numerous issues that can render it unusable on EFI64. -- -Gene A: Because it messes up the order in which people normally read text, especially the archives of mailing lists. Q: Why is Top-posting such a bad thing?