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