Hi All
    I use the following code to insert a breakpoint in physical address 
0×1600000CPUArchState *cpu = first_cpu;
hwaddr addr;
sscanf(command + 2, "%ld", &addr);
int err = cpu_breakpoint_insert(cpu, addr, BP_GDB, NULL );qemu successfully hit 
the breakpoint and stop, then i try to single-step by the following 
code:CPUArchState *cpu = first_cpu;
cpu_single_step(cpu, sstep_flags);
vm_start();Nothing happened, the EIP still stay in 0×1600000, but if i delete 
the breakpoint, the single step just work again. Am I missed something? 
thanks                                    

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