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Re: [Qemu-devel] [PATCH 5/7] tcg-i386: Implement deposit operation.

From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH 5/7] tcg-i386: Implement deposit operation.
Date: Wed, 26 Jan 2011 08:40:06 -0800
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101209 Fedora/3.1.7-0.35.b3pre.fc14 Thunderbird/3.1.7 
On 01/26/2011 08:00 AM, Alexander Graf wrote:
> Keeping it only inside of the translator would break on page faults, as
> the lower 32 bits of the register would lie around in a temporary which
> is invisible for the page fault resolver.

Given that QEMU doesn't support truely async signals, and the fact that
the translator can tell which insns can fault, I can't imagine that this
is actually a problem.

You should get the same sequence of writebacks when translating the TB
the second time for tcg_gen_code_search_pc.

Am I totally confused here?


r~
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