Hi Mikulas, On Tue, Jan 14, 2025 at 6:07 PM Mikulas Patocka <mpatocka@xxxxxxxxxx> wrote: > > Hi > > On PA-RISC, with the kernel 6.12.9, I get unaligned pointer warnings when > a module is loaded. The warnings are caused by the fact that the > .gnu.linkonce.this_module section is not aligned to the appropriate > boundary. If I dump the module content with "objdump -h configs.ko", I get > this. Note that the .gnu.linkonce.this_module has "File off 000042d2" and > "Algn 2**4". > > On x86-64, the same misalignment can be seen, but it doesn't cause > warnings because unaligned pointers are handled in hardware. > > This seems to be a bug in the linker, because when I compile an old kernel > with a new linker, I also get the misalignment. Do you have an idea how to > work around this bug? Does explicitly specifying section alignment in the module linker script fix this by any chance? > kernel-6.12.9, binutils from Debian ports: > [...] > kernel 6.10, older binutils: Which exact versions of binutils were used here? I don't see the alignment issue with binutils 2.42 on either x86_64 or parisc64, so I assume you're testing with something newer? $ hppa64-linux-gnu-ld.bfd --version GNU ld (GNU Binutils for Debian) 2.42.50.20240625 $ hppa64-linux-gnu-objdump -h configs.ko | grep -E '(format|this_module)' configs.ko: file format elf64-hppa-linux 17 .gnu.linkonce.this_module 00000300 0000000000000000 0000000000000000 00005c50 2**4 Sami
