On Wed, Aug 22, 2018 at 8:20 PM Mikhail Svetkin <mikhail.svet...@gmail.com> wrote: > > Hi all, > > I have found a problem with assembler code generation in network stack on ARM > processor (aligment fault). > > I am using: > arm-rtems5-gcc (GCC) 7.2.0 20170814 (RTEMS 5, RSB > a6d011e028a0776cedf0823940eb882e917a44e5, Newlib 2.5.0.20170922) > > The compiler generates invalid instruction 'ldmia' here > (https://git.rtems.org/rtems/tree/cpukit/libnetworking/netinet/udp_usrreq.c#n160). > > The instruction does not support unaligned accesses. > > Also i have found the bug fix in FreeBSD repository > (https://github.com/freebsd/freebsd/commit/6cc0e8d2a0b583db5707f811d4ebfbe1ad05e628) > > I tried their solution and it works. >
Do you mean you changed the alignment to 2 in RTEMS' cpukit/libnetworking/netinet/ip.h:85? https://git.rtems.org/rtems/tree/cpukit/libnetworking/netinet/ip.h#n85 If yes, and if you could confirm it worked / tests passed, feel free to submit a patch: https://devel.rtems.org/wiki/Developer/Contributing If not, a ticket with all the information is highly appreciated too! P.S. - I believe this is a part of the "old" networking stack for RTEMS - the "new" stack uses rtems-libbsd, which already includes the FreeBSD patch you mentioned: https://github.com/RTEMS/rtems-libbsd/blob/master/freebsd/sys/netinet/ip.h#L70 Perhaps someone can shed some light on when the old stack can be used vs. the new one, and how - I haven't seen much documentation on it. Patch fixes for the old stack should likely still be accepted while there are still BSPs using it. > Should I create a ticket for that? > > Best regards, > Mikhail > _______________________________________________ > devel mailing list > devel@rtems.org > http://lists.rtems.org/mailman/listinfo/devel _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
