Re: [Qemu-devel] [PATCH 02/17] lm32: translation routines

[Alexander Graf]

On 17.02.2011, at 23:51, Michael Walle wrote:

> Am Samstag 12 Februar 2011, 07:49:52 schrieb Blue Swirl:
>>> That said, IMHO the best handling of unknown opcodes would be to kill the
>>> VM.
>> 
>> In this case it should be OK. Alternatively the VM could be halted, so
>> that instead of restarting QEMU, only system_reset needs to be issued.
>> This may be more useful for developers, since for example registers
>> and memory can be examined after the error.
> 
> Good idea! May I call vm_stop() in a tcg helper? Like in the following 
> example:
> 
> void helper_vm_stop(uint32_t msg_id)
> {
>    if (qemu_log_enabled()) {
>        qemu_log("VM stopped: %s", err_msg_str[msg_id]);
>    } else {
>        fprintf(stderr, "VM stopped: %s", err_msg_str[msg_id]);
>    }
> #ifndef CONFIG_USER_ONLY
>    vm_stop(0);
> #endif
>    env->exception_index = EXCP_HALTED;
>    cpu_loop_exit();
> }
> 
> If not, what is the proper way to stop/pause the VM from within the executed 
> code?

Since I haven't seen any reply yet: Can't you just do the same as hlt and 
disable interrupts?


Alex