INLINE_SYSCALL fails on x86_64

[mcirsta at frugalware dot org]

 Hi

 Ever since the upgrade to gblic 2.15 I've been having a weird problem
reported by KDE, it's crash that I've been able to trace back to poll.c ,
line 87 (/sysdeps/unix/sysv/linux).
 I'm running Linux, kernel 3.3 , 64 bit, it's a less know distribution,
Frugalware, for which I'm also a maintainer. Other people using 2.15 have
reported this and it disappears when going back to 2.14. Also on i686
everything runs just fine.
 You can see the patches we apply here:
http://git.frugalware.org/gitweb/gitweb.cgi?p=frugalware-current.git;a=tree;f=source/base/glibc
 but there aren't many.
 Also I can't think of any special build flags being used.
 Stack trace is here:

Thread 2 (Thread 0x7f35cb0b2700 (LWP 1380)):
#0  0x00007f35e49a6fbf in __GI___poll (fds=<optimized out>,
nfds=<optimized out>, timeout=<optimized out>) at
../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f35e16cf024 in g_main_context_iterate.isra.23 () from
/usr/lib/libglib-2.0.so.0
#2  0x00007f35e16cf144 in g_main_context_iteration () from
/usr/lib/libglib-2.0.so.0
#3  0x00007f35e5fc3676 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
() from /usr/lib/libQtCore.so.4
#4  0x00007f35e5f945bf in
QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQtCore.so.4
#5  0x00007f35e5f94848 in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQtCore.so.4
#6  0x00007f35e5e997f0 in QThread::exec() () from /usr/lib/libQtCore.so.4
#7  0x00007f35e5f7518f in ?? () from /usr/lib/libQtCore.so.4
#8  0x00007f35e5e9c73b in ?? () from /usr/lib/libQtCore.so.4
#9  0x00007f35e5c06dbe in start_thread (arg=0x7f35cb0b2700) at
pthread_create.c:305
#10 0x00007f35e49aeadd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:115

 I've been able to find some differences in sysdep.h (
sysdeps/unix/sysv/linux/x86_64/sysdep.h ) in the ASM code. Is this code
used ? Could it have caused the problem.

 Thanks.