(gdb) bt
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb6c3c0b3 in write () from /lib/tls/i686/cmov/libc.so.6
#2  0xb6bdd3c4 in _IO_file_write () from /lib/tls/i686/cmov/libc.so.6
#3  0xb6bdd0a5 in ?? () from /lib/tls/i686/cmov/libc.so.6
#4  0xb6bdd36f in _IO_do_write () from /lib/tls/i686/cmov/libc.so.6
#5  0xb6bddc5e in _IO_file_overflow () from /lib/tls/i686/cmov/libc.so.6
#6  0xb6bdf4f9 in ?? () from /lib/tls/i686/cmov/libc.so.6
#7  0xb6cb94c0 in ?? () from /lib/tls/i686/cmov/libc.so.6
#8  0xffffffff in ?? ()
#9  0x00000000 in ?? ()