(gdb) bt
#0  0x6f749424 in __kernel_vsyscall ()
#1  0x430adc50 in __GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0x430b1c55 in __GI_abort () at abort.c:91
#3  0x081e595d in OsAbort () at utils.c:1266
#4  0x080c02bc in ddxGiveUp (error=EXIT_ERR_ABORT) at xf86Init.c:1060
#5  0x080c035e in AbortDDX (error=EXIT_ERR_ABORT) at xf86Init.c:1104
#6  0x081eb7e5 in AbortServer () at log.c:652
#7  0x081ebf00 in FatalError (f=0x8211744 "Caught signal %d (%s). Server aborting\n") at log.c:793
#8  0x081e3180 in OsSigHandler (sip=0x7794765c, signo=11, unused=<optimized out>) at osinit.c:146
#9  OsSigHandler (signo=11, sip=0x7794765c, unused=0x779476dc) at osinit.c:107
#10 <signal handler called>
#11 ChangeWindowDeviceCursor (pWin=0x95b5c58, pDev=0x90c9a38, pCursor=0x95191e0) at window.c:3458
#12 0x0816ce3f in ProcXIChangeCursor (client=0x94ceb50) at xichangecursor.c:105
#13 0x08165dba in ProcIDispatch (client=0x94ceb50) at extinit.c:406
#14 0x08079f0d in Dispatch () at dispatch.c:428
#15 0x080679ea in main (argc=8, argv=0x77947bf4, envp=0x77947c18) at main.c:295
(gdb) list
3438    in window.c
(gdb) disassemble
Dump of assembler code for function __kernel_vsyscall:
   0x6f749414 <+0>:     push   %ecx
   0x6f749415 <+1>:     push   %edx
   0x6f749416 <+2>:     push   %ebp
   0x6f749417 <+3>:     mov    %esp,%ebp
   0x6f749419 <+5>:     sysenter
   0x6f74941b <+7>:     nop
   0x6f74941c <+8>:     nop
   0x6f74941d <+9>:     nop
   0x6f74941e <+10>:    nop
   0x6f74941f <+11>:    nop
   0x6f749420 <+12>:    nop
   0x6f749421 <+13>:    nop
   0x6f749422 <+14>:    int    $0x80
=> 0x6f749424 <+16>:    pop    %ebp
   0x6f749425 <+17>:    pop    %edx
   0x6f749426 <+18>:    pop    %ecx
   0x6f749427 <+19>:    ret