Forgot to add uClibc list in CC. -------- Original Message -------- Subject: Re: AW: segmentation fault of dynamic executables with ld-uClibc.so.0 from0.9.29 on mipsel Date: Fri, 01 Jun 2007 08:51:33 +0200 From: Carmelo Amoroso <[EMAIL PROTECTED]> Organization: STMicroelectronics To: Carsten Lange <[EMAIL PROTECTED]> References: <[EMAIL PROTECTED]>
Carsten Lange wrote: > I used LD_DEBUG=all ./app but nothing was shown at all. > Investigating the code shows that this functionality is disabled for > __mips__ anyway. > > ... snip from dl-string.h > > /* The following macros may be used in dl-startup.c to debug > > * ldso before ldso has fixed itself up to make function calls */ > > /* On some (wierd) arches, none of this stuff works at all, so > > * disable the whole lot... */ > > #if defined(__mips__) > > # define SEND_STDERR(X) > > # define SEND_ADDRESS_STDERR(X, add_a_newline) > > # define SEND_NUMBER_STDERR(X, add_a_newline) > > #else > > ... snap > > > Using gdbserver is not easy because I have to link it static. I will > set up such debug environment Why do you need to link it statically if the problem seems to be in ld.so? Try to build the ld.so with debugging symbols, then start gdbserver into your target as usual, while pass to the gdb client the ld.so instead of your application image. Put a breakpoint into _dl_start for example and go step-by-step. This was the approach I used to debugging the ld.so while working on nptl port and worked for me. I can ensure the debugging the linker it's very interesting ;-) Regards, Carmelo > > I hoped that someone has run into the same problem and has found the > reason/workaroug for this. > > Carsten > > > -----Ursprüngliche Nachricht----- > *Von:* Joakim Tjernlund [mailto:[EMAIL PROTECTED] > *Gesendet:* Donnerstag, 31. Mai 2007 23:31 > *An:* Carsten Lange; [email protected] > *Betreff:* RE: segmentation fault of dynamic executables with > ld-uClibc.so.0 from0.9.29 on mipsel > > Try enabling SUPPORT_LD_DEBUG and run: > LD_DEBUG=all ./app > > you could try using gdb as well > > > ------------------------------------------------------------------------ > *From:* [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] *On Behalf Of *Carsten Lange > *Sent:* den 31 maj 2007 11:02 > *To:* [email protected] > *Subject:* segmentation fault of dynamic executables with > ld-uClibc.so.0 from0.9.29 on mipsel > > Hi all, > I used buildroot to build 3 toolchains for mipsel with > different uClibc versions and same versions of binutils and gcc: > > binutils version 2.17 > gcc version 4.1.2 > kernel-headers 2.4.25 > uClibc versions > 0.9.28 > 0.9.28.3 > 0.9.29 > I discovered that dynamically linked executables do segfault > when I use 0.9.29. > uClibc version 0.9.28 and 0.9.28.3 are working fine. > When I copy ld-uClibc.so.0 from uClibc version 0.9.28 and > 0.9.28.3 onto the target replacing the ld-uClibc.so.0 from > 0.9.29 everything works fine as well. > > Any help is very much welcome! > Carsten > > > ------------------------------------------------------------------------ > > _______________________________________________ > uClibc mailing list > [email protected] > http://busybox.net/cgi-bin/mailman/listinfo/uclibc _______________________________________________ uClibc mailing list [email protected] http://busybox.net/cgi-bin/mailman/listinfo/uclibc
