[U-Boot] [PATCH] pxe: fix handling of absolute paths

[Ian Campbell]

On Fri, 2013-10-18 at 13:04 -0500, Rob Herring wrote:
> From: Rob Herring <rob.herring at calxeda.com>
> 
> pxelinux and syslinux differ in their handling of absolute paths in menu
> files. A pxelinux path is aways prepended with the bootfile path while
> syslinux allows for absolute paths. u-boot was always treating a leading
> / as an absolute path breaking some pxelinux setups. Fix this by adding
> a flag to distinguish pxelinux vs. syslinux behavior.
> 
> Reported-by: Ian Campbell <Ian.Campbell at citrix.com>
> Signed-off-by: Rob Herring <rob.herring at calxeda.com>

You could also have Tested- or Acked-by from me if desired.

I also took a gander at the syslinux code and found that
core/fs/pxe/pxe.c:get_prefix() sets the initial cwd to the prefix. The
lookups are done relative to this unless the path is a URL (roughly
means it contains "::", see code/comments around the use of
PXE_RELATIVE)). In particular a leading "/" isn't specially treated as
far as I can see...

Ian.