Hi! On 4/27/19 5:02 PM, Mark Cave-Ayland wrote: > Adrian: based upon this I think what you need to do is: > > - For consistency rename /boot/grub/sparc64.elf to /boot/grub/core.img to > match > the descriptions of the grub components in the documentation
Ok. But still generate it with grub-mkimage? + grub-mkimage -O sparc64-ieee1275-cdcore -p '()/boot/grub' \ + -o $(TEMP_CD_INFO_DIR)/boot/grub/sparc64.elf \ + $(GRUB_MODULES) $(GRUB_MODULES_CDROM) > - Confirm that cdboot.img is the a.out executable generated by boot.S and > diskboot.S > (use dd and hexdump to check for the 0x01 0x03 0x01 0x07 signature in the > first 4 > bytes) glaubitz@kyoto:/usr/lib/grub/sparc64-ieee1275$ xxd cdboot.img |head -n2 00000000: 0103 0107 0000 01e0 0000 0000 0000 0000 ................ 00000010: 0000 0000 0000 4000 0000 0000 0000 0000 ......@......... glaubitz@kyoto:/usr/lib/grub/sparc64-ieee1275$ Yes. > - 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 ..." I set $CDDIR to the source directory which contains core.img? How does the initial bootloader know that it has to boot core.img? > Once this is done and the ISO image is generated, the basic setup can be > checked as > follows: > > - Use fdisk or similar tool to confirm that the Sun disk label exists at the > start of the .iso with all 8 partitions starting at sector 0 with an end > sector > representing the contents of the whole CDROM image > > - Use dd and hexdump to confirm that cdboot.img appears 512 bytes into the > .iso > by checking for the 0x01 0x03 0x01 0x07 signature > > - 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) > > - If everything is correct then again using dd and hexdump you should be able > to > see the ELF signature for core.img from the offset discovered above. > > Assuming all of this looks correct, then I believe that you should end up > with a > bootable CDROM image using grub... Nice. I'll give it a shot tonight and report back. Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - glaub...@debian.org `. `' Freie Universitaet Berlin - glaub...@physik.fu-berlin.de `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
