//设置halt
(gdb) set {int}0x400b0000 = 0x1(gdb) load
//设置下一个pc指针的值(gdb) set {int}0x400b2000 = 0x80(gdb) x /2x 0x400b20000x400b2000: 0x00000080 0x00000084(gdb) b mainRegister 834 is not available(gdb) set {int}0x400b0000 = 0x0(gdb) c