On Tuesday, October 15, 2013 5:08am, "Ian Campbell" Ian.Campbell@citrix.com said:

Hi,

I've noticed what appears to be an incompatibility between u-boot's pxe support and the x86 pxelinux stuff. I'm running on a Calxeda midway but AFAICT this not specific to the platform. It seems that Rob and Jason are both involved in u-boot pxe support as well as being from Calxeda so I guess I don't have to be too sure either way ;-)

syslinux/README says: Note that all filename references are relative to the directory pxelinux.0 lives in.

And u-boots emulation of pxelinux's behaviour seems to implement this for loading pxelinux.cfg but not for loading any files referenced by the config. This seems to have been related to https://bugs.launchpad.net/ubuntu/+source/u-boot-linaro/+bug/927781

The Xen.org osstest infrastructure has in dhcpd.conf: filename "pxe/syslinux.0" and runs a tftp server exporting /tftpboot with all the files in /tftpboot/pxe.

This leads to: TFTP from server 10.80.248.135; our IP address is 10.80.229.106; sending through gateway 10.80.224.1 Filename 'pxe/syslinux.0'. Load address: 0x800000 Loading: ## done Bytes transferred = 26793 (68a9 hex) [...] TFTP from server 10.80.248.135; our IP address is 10.80.229.106; sending through gateway 10.80.224.1 Filename 'pxe/pxelinux.cfg/01-fc-2f-40-11-72-5c'. Load address: 0x700000 Loading: # done Bytes transferred = 513 (201 hex) Config file found However the config file contains: serial 0 115200 timeout 5 label overwrite menu label ^Overwrite menu default kernel /ianc/osstest/debian-installer/armhf/2013-09-23-wheezy/linux.armmp [...] append [...] initrd=/ianc/osstest/tmp/marilith-n4--initrd.gz [...] leading to: Retrieving file: /ianc/osstest/tmp/marilith-n4--initrd.gz Using xgmac0 device TFTP from server 10.80.248.135; our IP address is 10.80.229.106; sending through gateway 10.80.224.1 Filename '/ianc/osstest/tmp/marilith-n4--initrd.gz'. Load address: 0x4000000 Loading: * TFTP error: 'File not found' (1)

The actual path to the initrd is /tftpboot/pxe/ianc/osstest/... IOW the /pxe prefix has been dropped.

I think this differs from how real pxelinux on x86 behaves, at least judging from the osstest setup...

Thanks for the heads up.

Could this be a tftp server setup issue? Should the server prepend "/whatever" with it's root? If not then I guess u-boot needs to strip any leading /.

Rob