qemu:handle_cpu_signal received signal outside vCPU context

问题描述
执行./qemu-mips ./hello_mips时报错。
错误信息
qemu:handle_cpu_signal received signal outside vCPU context
解决方案
在qemu源码中灵活利用printf()来定位/linux-user/main.c代码哪块出现问题，然后解决掉。