given what you're trying to do, I'd think it would be easier to modify depthcharge to jump to RW_LEGACY later / after doing the other init normally done when booting ChromeOS, than to try and shoehorn SeaBIOS into something depthcharge would load like a kernel

On Tue, Oct 3, 2017 at 9:42 PM, Tang Rong <phtr071@gmail.com> wrote:

Hi Matt, we chated about kexec booting chromeos for Acer C710 on IRC,
thanks a lot for your help.

I digged to into depthcharge code, and found they did quite a lot of
work, including patching the SMBIOS for fwid, redirecting ehci to
xhci, etc. However, SeaBios on RW_LEGACY can not enjoy these work as
legacy mode got started very early. In addition, flash
seabios/tianocore on ssd (pretending to be linux kernel) would be much
safer option.