[syslinux] Dynamic debugging how to WAS: Syslinux-6.02-pre2 - booting 32-bit kernels from efi64

Matt Fleming matt at console-pimps.org
Wed Jul 17 00:24:11 PDT 2013

On Sun, 14 Jul, at 03:50:08PM, Gene Cumm wrote:
> Is the dynamic debugger information better there or
> http://www.syslinux.org/wiki/index.php/Debugging a newer page I made
> to help end-users, especially those who don't have experience
> compiling Syslinux and/or don't have a reliable build machine for
> Syslinux?

Hmm.. it probably makes sense to link to the info from both places, but
I've no strong feelings about which is the "master" location. Feel free
the move the text to ...index.php/Debugging if you'd like.
> Is there a way to modify a binary (especially pxelinux.0) such that
> certain key debug messages are active?  I've got my UNDI debug (just
> drops up to 3 lines via dprintf() per packet sent or received) and was
> wondering how to make a build that could coexist (without a rebuild)
There is no way to modify binary files (after compilation and before
runtime) to enable debug messages. I think you're idea of sending a DHCP
option to enable debug messages in (l)pxelinux.0 is worth persuing.

Matt Fleming, Intel Open Source Technology Center

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