Re: [Qemu-devel] [PATCH] linux-user: Fix stale tbs after mmap

[Peter Maydell]

On 11 May 2012 09:40, Alexander Graf <address@hidden> wrote:
> If we execute linux-user code that does the following:
>
>  * A = mmap()
>  * execute code in A
>  * munmap(A)
>  * B = mmap(), but mmap returns the same address as A
>  * execute code in B
>
> we end up executing a stale cached tb that contains translated code
> from A, while we want new code from B.
>
> This patch adds a TB flush for mmap'ed regions, before we return them,
> avoiding the whole issue. It also adds a flush for munmap, so that we
> don't execute stale TBs instead of getting a segfault.
>
> Reported-by: Peter Maydell <address@hidden>
> Signed-off-by: Alexander Graf <address@hidden>

Reviewed-by: Peter Maydell <address@hidden>

-- PMM