On Fri, Aug 2, 2024 at 5:12 PM Arnd Bergmann <arnd@xxxxxxxx> wrote: > Right, for us this is clearly only done for legacy user > binaries. It is still possible to run an OABI Debian-5.0 > or older rootfs with a new kernel, but there are not a lot > of reasons to do so, other than ARMv4 (StrongARM) > hardware. The only times I ever tried using it were > to test kernel changes that impact OABI syscall handling. I tried it with the old RedHat rootfs of the NetWinder. It "worked" but you had to create e.g a sysfs directory for the thing to even boot. Debian 5 got its last update 12 years or so ago. Security-wise it must be strongly discouraged to connect anything like that to a public network given the plethora of issues in that old userspace, so I don't know if it can even be useful for anything. The SSH agent will be refused by contemporary servers. Maybe if you just have 1-2 old OABI binaries without source code that you just have to keep running? Is there any such system? If people absolutely want to run these machines they should probably port OpenWrt to them so they can run a modern userspace, and OpenWrt uses EABI, albeit with a hack, but it's the best I know of: https://github.com/openwrt/openwrt/blob/main/toolchain/gcc/patches-14.x/840-armv4_pass_fix-v4bx_to_ld.patch Yours, Linus Walleij
