From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnout Vandecappelle Date: Wed, 27 Feb 2013 22:47:24 +0100 Subject: [Buildroot] segfault in uClibc-0.9.33.2 when using busybox ip In-Reply-To: <1361983607940-41081.post@n4.nabble.com> References: <1361983607940-41081.post@n4.nabble.com> Message-ID: <512E7EEC.7010007@mind.be> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net On 27/02/13 17:46, mathematician1975 wrote: > I have used buildroot to generate my crosstools, root file system, kernel > (3.6.11) and busybox (1.21.0) for an i386 (Geode) target board. Basically I > am using buildroot to generate everything. I was recently trying to > configure my network but when I invoked the following from the command line > > # ip addr show dev eth0 > > I received the following report of a segfault. > > 2: eth0: mtu 1500 qdisc pfifo_fast qlen > 1000 link/ether 00:18:7d:19:a0:d8 brd ff:ff:ff:ff:ff:ff > inet 172.18.255.212/24 brd 172.18.255.255 scope global eth0 > [ 331.700545] ip[951]: segfault at 0 ip b76e1f26 sp bfbd29b0 error 4 in > libuClibc-0.9.33.2.so[b76b5000+4d000] > Segmentation fault > > I have searched these archives for similar reports but I cannot find > anything. I would be very grateful for any advice that anyone who has had a > similar problem can offer, or how I go about trying to establish if this is > down to user error on my part or a bug in busybox/uClibc. User error is unlikely, unless you did something very strange while building. Given that the segfault happens in uClibc, it's most likely a uClibc problem. Definitely not a buildroot problem :-) Here are some hints how to debug: - Rebuild with another uClibc version. - Do an 'objdump -d output/staging/lib/libc.so | less' and look what is at address b76e1f26. - Run it in a chroot or emulated environment. If that works, then it's most likely a problem with mismatch of your build options and the Geode processor (so user error after all :-). - Run the 'ip' program in a debugger (gdbserver) to find what goes wrong. - Check uClibc mailing lists for similar issues. Good luck! Regards, Arnout -- Arnout Vandecappelle arnout at mind be Senior Embedded Software Architect +32-16-286500 Essensium/Mind http://www.mind.be G.Geenslaan 9, 3001 Leuven, Belgium BE 872 984 063 RPR Leuven LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle GPG fingerprint: 7CB5 E4CC 6C2E EFD4 6E3D A754 F963 ECAB 2450 2F1F