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(gdb) bt
#0  0x10005a99 in ?? ()
Cannot access memory at address 0xffffffbe
(gdb) disass $eip-32 $eip+32
Dump of assembler code from 0x10005a79 to 0x10005ab9:
0x10005a79:     test   %ch,%ch
0x10005a7b:     mov    %esi,0x18(%esp,1)
0x10005a7f:     je     0x10005a95
0x10005a81:     mov    0x10(%esp,1),%esi
0x10005a85:     test   %ecx,%ecx
0x10005a87:     jge    0x10005a8f
0x10005a89:     movb   $0x0,(%eax,%esi,1)
0x10005a8d:     jmp    0x10005a9c
0x10005a8f:     movb   $0xff,(%eax,%esi,1)
0x10005a93:     jmp    0x10005a9c
0x10005a95:     mov    0x10(%esp,1),%esi
0x10005a99:     mov    %cl,(%eax,%esi,1)
0x10005a9c:     test   %bh,%bh
0x10005a9e:     je     0x10005ab0
0x10005aa0:     test   %ebx,%ebx
0x10005aa2:     jge    0x10005aaa
0x10005aa4:     movb   $0x0,0x1(%eax)
0x10005aa8:     jmp    0x10005ab3
0x10005aaa:     movb   $0xff,0x1(%eax)
0x10005aae:     jmp    0x10005ab3
0x10005ab0:     mov    %bl,0x1(%eax)
0x10005ab3:     cmpb   $0x0,0x19(%esp,1)
0x10005ab8:     je     0x10005ad7
End of assembler dump.