Re: [Qemu-devel] [PATCH v2 04/28] linux-user: Define TARGET_ERESTART* errno values

[Laurent Vivier]

Le 12/05/2016 à 19:47, Peter Maydell a écrit :
> From: Timothy E Baldwin <address@hidden>
> 
> Define TARGET_ERESTARTSYS; like the kernel, we will use this to
> indicate that a guest system call should be restarted. We use
> the same value the kernel does for this, 512.
> 
> Signed-off-by: Timothy Edward Baldwin <address@hidden>
> [PMM: split out from the patch which moves and renumbers
>  TARGET_QEMU_ESIGRETURN, add comment on usage]
> Reviewed-by: Peter Maydell <address@hidden>
> Signed-off-by: Peter Maydell <address@hidden>

Reviewed-by: Laurent Vivier <address@hidden>

> ---
>  linux-user/errno_defs.h | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/linux-user/errno_defs.h b/linux-user/errno_defs.h
> index 8a1cf76..b7a8c9f 100644
> --- a/linux-user/errno_defs.h
> +++ b/linux-user/errno_defs.h
> @@ -139,3 +139,11 @@
>  /* for robust mutexes */
>  #define TARGET_EOWNERDEAD      130     /* Owner died */
>  #define TARGET_ENOTRECOVERABLE 131     /* State not recoverable */
> +
> +/* QEMU internal, not visible to the guest. This is returned when a
> + * system call should be restarted, to tell the main loop that it
> + * should wind the guest PC backwards so it will re-execute the syscall
> + * after handling any pending signals. They match with the ones the guest
> + * kernel uses for the same purpose.
> + */
> +#define TARGET_ERESTARTSYS     512     /* Restart system call (if 
> SA_RESTART) */
>