Hi Kolbjørn, On Tue, 2026-01-06 at 14:40 +0100, John Paul Adrian Glaubitz wrote: > Hi Kolbjørn, > > On Tue, 2026-01-06 at 14:34 +0100, Kolbjørn Barmen wrote: > > On Mon, 16 Jun 2025, John Paul Adrian Glaubitz wrote: > > > > > To summarize: > > > > > > - the ELF header provides provides the e_ident and e_flags fields which > > > could be > > > used for identifying a Linux/m68k system using the 4 bytes alignment ABI > > > - MIPS uses e_flags for differentiating its ABIs > > > - PA-RISC sets e_ident to 0x03 (Linux) while every other arch uses 0x00 > > > (SysV ABI) > > > - qemu-user needs to be patched to deal with the changed alignment > > > (include/user/abitypes.h) > > > - the kernel needs to be patched to deal with the changed alignment > > > (arch/m68k/kernel/signal.c) > > > > > > Does this patch exist somewhere? I ask because I am migrating to > > 32bit-aligned userland (https://www.gentoo.org/downloads/#m68k) and the > > gcc provided fails building kernel, stopping at arch/m68k/kernel/signal.c > > I haven't created that patch yet as my work on this effort is currently > paused. However, it should > be straight-forward to update the asserts in the kernel code. > > According to Geert, Arnd Bergmann made some changes to the kernel uapi that > would allow the kernel > to be built with either alignment. Not sure what the current state of things > is. > > Let's CC Arnd to find out.
FWIW, please feel free to amend this page [1] in the Debian Wiki if you stumble across any problems. Adrian > [1] https://wiki.debian.org/M68k/Alignment -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
