Thomas Schmitt wrote: > Hi, > > >> I attach the patch I used for dirty checks >> > > Oh. You already tested. > And ? Did it boot ? > > Yes it booted in qemu-tianocore. >> Why not to determine it [-boot-load-size] from >> file size by default? >> > > Because mkisofs doesn't do that, afaik. > One never knows what happens if one deviates from > the old ways by default. > Ok, legacy :(. But --efi-boot would have no legacy. > (See Joliet and grub 1.96. I now go the old > way by default. So grub-mkrescue 1.96 boots from > CD.) > It was a grub bug. > > >> The problem is that I would like to have efi+bios cd with 2 eltorito >> entries: one with platformid=0 and another one with platformid=0xef. >> > > Ahum. More than one boot table entry. > Would they point to different boot images ? > > Yes > I.e would we have > -b <BIOS-image> [-boot-info-table] --efi-boot <EFI-image> > > Yes. Prototype is available at http://bzr.savannah.gnu.org/r/grub/people/phcoder/rescue-efi/ . > Is it possible to get an exact prescription, what > info to write at which byte in the boot catalog ? > > BIOS+EFI one should look like Validation entry with id = 0 Default entry (BIOS). I would like that on hybrid BIOS always come in default entry to avoid hitting BIOS bugs Section header entry: 0x91, 0xef, 0x0001, 0, ..., 0 Section entry: 0x88, 0x00, 0x0000, 0, 0, <number of sectors in EFI boot image>, <LBA start>, 0, ..., 0 In case of just EFI the Section header entry and Section entry become Validation entry and default entry. > I have a PDF: El Torito 1.0, January 25, 1995. > Figure 1, "Multiple Boot-Image Configuration" > seems to be what you intend. > I will try to match this with the existing code > in libisofs (by Vreixo Formoso). > > > ------------------------------------------------ > > >>> Do i get it right that you want the LBA [...] >>> to be as low as possible ? >>> >> Yes and also the offset to files from boot/grub >> and metadata to reach it >> > > I learned meanwhile that there is a feature > "weight" in libisofs by which one can influence > the sequence of the data LBAs. An IsoNode with > high weight will get a low LBA. > > So this is merely a matter of suitable options > in xorriso, by which one can put weight on files. > > Nice > ------------------------------------------------ > > > Have a nice day :) > > Thomas > > > > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > http://lists.gnu.org/mailman/listinfo/grub-devel > >
-- Regards Vladimir 'φ-coder/phcoder' Serbinenko
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