This is the mail archive of the libc-hacker@sources.redhat.com mailing list for the glibc project.
Note that libc-hacker is a closed list. You may look at the archives of this list, but subscription and posting are not open.
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |
Other format: | [Raw text] |
Roland McGrath <roland@redhat.com> writes: > Ok, I was wrong. I actually can only reproduce this in a build that's > using not 2.4.18 headers but newer headers that define __NR_set_thread_area > (when running on a 2.4.18 kernel that doesn't have the system call). My kernel headers do not have that call. > > If that is your situation too, are you sure it worked before? If that is > not your situation, then I can't reproduce your situation and you will have > to find some more information for me. > > The crash I see is from the useldt.h macros' use of INLINE_SYSCALL > resulting in it calling __errno_location, which bombs when %gs isn't set up > yet. AFAICT the useldt.h macros have the very same issue with errno not > being set up as the TLS macros have (errno TLS var vs __errno_location > definition from libpthread, but both need %gs to be set up or they crash). > So I am going to consolidate those macros and use the versions that avoid > trying to set errno for both. Unfortunatly my gdb cannot debug this but it's somewhere in the libpthread startup code: 22306: calling init: /builds/test-install/lib/libpthread.so.0 22306: 22306: symbol=__errno_location; lookup in file=linuxthreads/ex3 22306: symbol=__errno_location; lookup in file=/builds/test-install/lib/libpthread.so.0 22306: binding file /builds/test-install/lib/libpthread.so.0 to /builds/test-install/lib/libpthread.so.0: normal symbol `__errno_location' [GLIBC_2.0] Segmentation fault Without the --enable-kernel=2.4.18 everything works, so it seems to be a problem with the useldt code, Andreas -- Andreas Jaeger SuSE Labs aj@suse.de private aj@arthur.inka.de http://www.suse.de/~aj
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |