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Re: [Qemu-devel] Question about gen_jmp_tb


From: Jack Biggs
Subject: Re: [Qemu-devel] Question about gen_jmp_tb
Date: Mon, 02 Jun 2014 12:15:02 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

When you say arbitrary code what do you mean? Are you wanting to put backend specific code there or a common post-amble of tcg ops? Can you give a bit more detail about your use case?

I'm trying to add a clock-synchronization library so that I can have two (or more) instances of QEMU run in a synchronized (deterministic) fashion. The "arbitrary code" is more or less a function call (i.e., callq) instruction to a function that uses shared semaphores to block execution.

Jack



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