=> 0xf74f2d <pthread_mutex_lock+29>:	mov    0xc(%esi),%edi
   0xf74f30 <pthread_mutex_lock+32>:	mov    %edi,%ecx
   0xf74f32 <pthread_mutex_lock+34>:	mov    %edi,%eax
   0xf74f34 <pthread_mutex_lock+36>:	and    $0x7f,%ecx
   0xf74f37 <pthread_mutex_lock+39>:	and    $0x7c,%eax
   0xf74f3a <pthread_mutex_lock+42>:	
    jne    0xf74f81 <pthread_mutex_lock+113>
   0xf74f3c <pthread_mutex_lock+44>:	mov    %gs:0x68,%edx
   0xf74f43 <pthread_mutex_lock+51>:	test   %ecx,%ecx
   0xf74f45 <pthread_mutex_lock+53>:	mov    %edx,-0x10(%ebp)
   0xf74f48 <pthread_mutex_lock+56>:	
    jne    0xf74fbe <pthread_mutex_lock+174>
   0xf74f4a <pthread_mutex_lock+58>:	and    $0x80,%edi
   0xf74f50 <pthread_mutex_lock+64>:	mov    $0x1,%ecx
   0xf74f55 <pthread_mutex_lock+69>:	xor    %eax,%eax
   0xf74f57 <pthread_mutex_lock+71>:	lock cmpxchg %ecx,(%esi)
   0xf74f5b <pthread_mutex_lock+75>:	jne    0xf75132 <_L_lock_748>
   0xf74f61 <pthread_mutex_lock+81>:	mov    0x8(%esi),%eax