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hamishcoleman / thinkpad-ec

Infrastructure for examining and patching Thinkpad embedded controller firmware
GNU General Public License v2.0
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.FL1 file support #46

Closed skochinsky closed 6 years ago

skochinsky commented 7 years ago

You mention in readme problems with the L530 update. I downloaded it and it seems it has the $PFH trailer which contains names and offsets of the regions included in the file (in the update I downloaded it's at offset 008001D0). I documented the layout here and you can find a sample implementation in https://github.com/theopolis/uefi-firmware-parser/commit/aea0eaf4608958fed86e68e92d9aeaf17dbfd16f

skochinsky commented 7 years ago

Correction: it seems this FL1 is a capsule and the flash image starts at 0x1D0 bytes. After stripping the header, the data from $PFH header lines up properly:

4 images at 008000DC
00000000 00001000 Desc
00001000 003FF000 Me
00400000 00020000 Ec
00420000 003E0000 Bios
hamishcoleman commented 7 years ago

Cool, thanks - I'll add some slicing for the $PFH header and see if there is anything useful inside there

hamishcoleman commented 7 years ago

I've added support to extract the EC image from a FL1 file with a $PFH header, but unfortunately the firmware is for a different CPU architecture, so the existing patch recipes cannot be simply ported.