Due to commit [cdrtools-native: fix booting EFI ISO live failed]
applied to improve mkisofs to fix nsectors exceeds 0xffff situation
which set selection criteria type = 2 and save extra nsectors to
vendor unique selection criteria
In following case, add 64MB extra space to bootable image efi.img,
and the partition table of EFI is truncated to 32M
$ echo 'IMAGE_FSTYPES:pn-core-image-minimal = " live"' >> conf/local.conf
$ echo 'MACHINE_FEATURES:append = " efi pcbios"' >> conf/local.conf
$ echo '# 64MB extra space to bootable image efi.img' >> conf/local.conf
$ echo 'BOOTIMG_EXTRA_SPACE = "65535"' >> conf/local.conf
$ bitbake core-image-minimal
$ fdisk -l tmp/deploy/images/qemux86-64/core-image-minimal-qemux86-64.rootfs.iso
...
Device Boot Start End Sectors Size Id Type
tmp/deploy/images/qemux86-64/core-image-minimal-qemux86-64.rootfs.iso1 * 0 376831 376832 184M 0 Empty
tmp/deploy/images/qemux86-64/core-image-minimal-qemux86-64.rootfs.iso2 120 65654 65535 32M ef EFI (FAT-12/16/32)
After applying this patch to process extra sector count, the partition
table of EFI is 90.3M
$ fdisk -l tmp/deploy/images/qemux86-64/core-image-minimal-qemux86-64.rootfs.iso
...
Device Boot Start End Sectors Size Id Type
tmp/deploy/images/qemux86-64/core-image-minimal-qemux86-64.rootfs.iso1 * 0 376831 376832 184M 0 Empty
tmp/deploy/images/qemux86-64/core-image-minimal-qemux86-64.rootfs.iso2 120 185151 185032 90.3M ef EFI (FAT-12/16/32)
[1]https://pdos.csail.mit.edu/6.828/2017/readings/boot-cdrom.pdf
(From OE-Core rev: b4e112ed7e6ba5a6c6df530d696485a588831851)
(From OE-Core rev: 741d5ed1b906b8763d9f346481e980e2041c9c2a)
Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
50597ef223