=> 0x8053dfb <gc_board_stop+11>:	mov    0x4(%eax),%edx
   0x8053dfe <gc_board_stop+14>:	test   %edx,%edx
   0x8053e00 <gc_board_stop+16>:	je     0x8053e30 <gc_board_stop+64>
   0x8053e02 <gc_board_stop+18>:	mov    (%eax),%edx
   0x8053e04 <gc_board_stop+20>:	test   %edx,%edx
   0x8053e06 <gc_board_stop+22>:	je     0x8053e30 <gc_board_stop+64>
   0x8053e08 <gc_board_stop+24>:	mov    0x54(%edx),%ecx
   0x8053e0b <gc_board_stop+27>:	test   %ecx,%ecx
   0x8053e0d <gc_board_stop+29>:	je     0x8053e30 <gc_board_stop+64>
   0x8053e0f <gc_board_stop+31>:	movl   $0x0,0x4(%eax)
   0x8053e16 <gc_board_stop+38>:	mov    0x54(%edx),%eax
   0x8053e19 <gc_board_stop+41>:	mov    0x2c(%eax),%edx
   0x8053e1c <gc_board_stop+44>:	test   %edx,%edx
   0x8053e1e <gc_board_stop+46>:	je     0x8053e23 <gc_board_stop+51>
   0x8053e20 <gc_board_stop+48>:	call   *0x2c(%eax)
   0x8053e23 <gc_board_stop+51>:	leave