Re: unaligned memory access with HPPA

On 1/13/26 21:26, Christian Groessler wrote:
> I've noticed that the kernel covers up unaligned memory accesses,
> see this dmesg message (and the program doesn't crash):
>=20
> [26186.220638] unal(9569): unaligned access to 0x000110e9 at ip 0x000105=
43 (iir 0x0f40109c)
>=20
> Is there a way to disable the handling of unaligned accesses in kernel 6=
.x?
> I'd like to get a bus error (SIGBUS or other signal) so I can find
> the places in the code where unaligned accesses are done.
See "What are =E2=80=9Cunaligned access=E2=80=9D messages about?" section =
in the FAQ at:
https://parisc.docs.kernel.org/en/latest/parisc_faq.html

You can start your program with the prctl program.
prctl --unaligned=3D[silent|signal|always-signal|default] your_program_nam=
e changes the behaviour for the started program and all it=E2=80=99s child=
 processes. Read the man documentation for prctl for more details.

Helge