[coreboot] [PATCH] The filo crashes if the filo and coreboot overlap.

Marc Jones marcj303 at gmail.com
Tue Nov 3 23:42:27 CET 2009

On Tue, Nov 3, 2009 at 9:12 AM, Patrick Georgi <patrick at georgi-clan.de> wrote:
> Am 03.11.2009 04:23, schrieb Bao, Zheng:
>> If the coreboot and filo overlap, it will "slice off" a piece at the
>> beginning or end. In the beginning case, a new segment is inserted
>> before the current one.  The ptr will move forward and doesn't seem to
>> have any chance to process the "new" segment.
> You are aware that your patch only has an effect for non-compressed
> payloads?

Patrick and Zheng,

I'm struggling to understand the bug. If the payload is uncompressed,
it can put a segment before coreboot in the bouncebuffer (this seems
to be the bug?). Then the loop needs to be re-run on the newly
split/added segment. If it is compressed, It will skip all of the
coreboot area and not allocate a segment before coreboot (put the
entire thing in the bounce buffer?).

Does this get back to the CONFIG_RAMBASE=0x00200000 on fam10?



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