On 27/04/2019 16:40, Thomas Schmitt wrote: > Hi, > > Mark Cave-Ayland wrote: >> - In your second patch re-enable the -G/-B options but with -G set to >> cdboot.img: >> add_mkisofs_opt $CDDIR/../$N.mkisofs_opts "-G cdboot.img -B ..." > > Does this refer to > From: John Paul Adrian Glaubitz <[email protected]> > Date: Thu, 25 Apr 2019 00:05:45 +0200 > https://lists.debian.org/debian-sparc/2019/04/msg00036.html > ? > > >> Once this is done and the ISO image is generated, [...] >> - Next check the offset and size of /boot/grub/core.img embedded in >> sector 1 using dd and hexdump. As per Thomas' message you should find >> the offset in bytes of the start of /boot/grub/core.img at offset 552 >> from the start of the .iso (64-bit big endian) and its size at offset >> 560 from the start of the .iso (32-bit big endian) > > This would be put there by xorriso -as mkisofs option > > --grub2-sparc-core ...path.of.file.in.ISO.filesystem... > > With genisoimage it would be necessary to insert the info by > post-processing. /usr/bin/isoinfo prints block addresses as first number > in its "[ NN NN]" column. Byte offset is block address * 2048.
Ooops yes indeed, it is necessary to explicitly enable this via --grub2-sparc-core. In that case I think the change for Adrian's second patch should in fact be this: add_mkisofs_opt $CDDIR/../$N.mkisofs_opts "-G cdboot.img -B ... --grub2-sparc-core /boot/grub/core.img" Does that look better? ATB, Mark.
