On 2022-12-18 12:32 p.m., Helge Deller wrote:
Sadly, glibc (I believe) still generates some:
dupload(8822): unaligned access to 0xf8b3630d at ip 0xf720c88b (iir 0xee8104d)
http(6292): unaligned access to 0xfab011cd at ip 0xf720c9c3 (iir 0xd481043)
why do you think it's from glibc?
couldn't it be from the program itself?
I haven't actually debugged these but previously the warnings from http came from a
misaligned header in the glibc resolver.
commit 05dec22d7be722987ff07aebf9690f6078b3c4e9
Author: John David Anglin <danglin@xxxxxxxxxxx>
Date: Tue Mar 22 17:35:54 2022 +0000
resolv: Fix unaligned accesses to fields in HEADER struct
The structure HEADER is normally aligned to a word boundary but
sometimes it needs to be accessed when aligned on a byte boundary.
This change defines a new typedef, UHEADER, with alignment 1.
It is used to ensure the fields are accessed with byte loads and
stores when necessary.
V4: Change to res_mkquery.c deleted. Small whitespace fix.
V5: Move UHEADER typedef to resolv/resolv-internal.h. Replace all
HEADER usage with UHEADER in resolv/res_send.c.
Signed-off-by: John David Anglin <dave.anglin@xxxxxxxx>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@xxxxxxxxxx>
Dave
--
John David Anglin dave.anglin@xxxxxxxx
