I bisected binutils and found the significant change that avoids the problem to be:
commit d1bcae833b32f1408485ce69f844dcd7ded093a8 (HEAD, refs/bisect/bad) Author: H.J. Lu <[email protected]> Date: Thu Jan 7 06:42:00 2021 -0800 ELF: Don't generate unused section symbols Now, this doesn't appear to be a bug fix per se, more of an optimization. I'm guessing it is just avoiding the underlying issue as a side-effect. I found this commit[*] in GRUB which purports to fix an arm64-specific issue with a patch we are carrying, and describes issues with section sizes: util/mkimage: Fix wrong PE32+ section sizes for some arches The commit f60ba9e5945 (util/mkimage: Refactor section setup to use a helper) added a helper function to setup PE sections. But it also changed how the raw data offsets were calculated since all the section sizes are aligned. However, for some platforms, i.e ia64-efi and arm64-efi, the kernel image size is not aligned using the section alignment. This leads to the situation in which the mods section offset in its PE section header does not match its real placement in the PE file. So, finally the GRUB is not able to locate and load built-in modules. While I'm not setting those exact symptoms (memdisk modules *do* load), I tested it to see if it addresses this issue. Unfortunately it does not. [*] https://git.savannah.gnu.org/cgit/grub.git/commit/?id=c0e647eb0e2bd09315612446cb4d90f7f75cb44c -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1934192 Title: regression between 2.04-1ubuntu44 and 2.04-1ubuntu44.2 breaks netboot on arm64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/1934192/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
