[Buildroot] segfault in uClibc-0.9.33.2 when using busybox ip
arnout at mind.be
Wed Feb 27 21:47:24 UTC 2013
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: <BROADCAST,MULTICAST,UP,LOWER_UP> 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: segfault at 0 ip b76e1f26 sp bfbd29b0 error 4 in
> 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.
Arnout Vandecappelle arnout at mind be
Senior Embedded Software Architect +32-16-286500
G.Geenslaan 9, 3001 Leuven, Belgium BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
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