Hi,
attached patch is another attempt at minimizing bootblock size. It also removes the obsolete ldscript_cbfs.lb, and removes any mention of _lrom and _elrom, which were set but never used (and broke the minimization approach used)
With the patch, the bootblock for kontron/986lcd-m is just 978 bytes, the bootblock for amd/serengeti_cheetah_fam10 is 2390 bytes (more complex setup), and asus/m2v-mx_se features a bootblock of 674 bytes.
I only did that for the tinybootblock variant of building images, as it's much easier and thus safer to handle.
I also added a memory region constraint, so ld fails once the bootblock is more than 64k, which will be most effective to guards against the close-to-4GB images we've seen every once in a while. However, this might require some tweaking of the list of discarded sections, as ld complains about the various "default" sections, even if those are empty and would be discarded in any case.
Those files should also be renamed at some point (no need to mention that the file is for "CBFS", and .lb should be called .cb), but I'd prefer to do that after I moved away the ldscripts variable in the build system, so there are fewer files to touch for that.
Signed-off-by: Patrick Georgi patrick.georgi@coresystems.de