Re: [Qemu-devel] [PATCH 00/11] target/sh4 improvments

[Aurelien Jarno]

On 2017-07-05 14:23, Richard Henderson wrote:
> This fixes two problems with atomic operations on sh4,
> including an attempt at supporting the user-space atomics
> technique used by most sh-linux-user binaries.
> 
> This is good enough to run the one occurrence in linux-user-test-0.3.
> I'm still downloading enough of a cross environment to be able to run
> more recent sh4 binaries.  Including the one in the LP bug report.
> 
> Thoughts and more extensive testing appreciated.

Thanks for you work. For the next version, could you please base it on
this patchset:

http://lists.nongnu.org/archive/html/qemu-devel/2017-07/msg00095.html

I'll try to review it over the next days, but unfortunately I'll have
little time before Monday.

-- 
Aurelien Jarno  GPG: 4096R/1DDD8C9B
aurel...@aurel32.net http://www.aurel32.net

Re: [Qemu-devel] [PATCH 00/11] target/sh4 improvments

[Laurent Vivier]

Le 06/07/2017 à 02:23, Richard Henderson a écrit :
> This fixes two problems with atomic operations on sh4,
> including an attempt at supporting the user-space atomics
> technique used by most sh-linux-user binaries.

I tried some time ago to support gUSA hack by decoding the
instruction[1] the application wants to be atomic, but it is not viable
as we need to know all possible sequences the user can generate (but we
can guess it is always generated by glibc, and thus well known).

Laurent

[1]
https://github.com/vivier/qemu/commit/25013c121661c6831f08c2140114c8de06cf48da