Re: [Qemu-devel] [PATCH] linux-user/signal.c: Use frame->retcode instead of frame address for alpha target restorer

[Laurent Vivier <laurent@vivier.eu>]

Le 29/03/2016 16:01, chengang@emindsoft.com.cn a écrit :
> From: Chen Gang <chengang@emindsoft.com.cn>
> 
> The restorer needs the return code address which is frame->retcode, not
> frame itself.
> 
> Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
> ---
>  linux-user/signal.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/linux-user/signal.c b/linux-user/signal.c
> index e487f9e..4157154 100644
> --- a/linux-user/signal.c
> +++ b/linux-user/signal.c
> @@ -5455,7 +5455,7 @@ static void setup_rt_frame(int sig, struct target_sigaction *ka,
>                     &frame->retcode[1]);
>          __put_user(INSN_CALLSYS, &frame->retcode[2]);
>          /* imb(); */
> -        r26 = frame_addr;
> +        r26 = frame_addr + offsetof(struct target_rt_sigframe, retcode);
>      }
>  
>      if (err) {
> 

If you change setup_rt_frame(), you must update setup_frame() too.

It seems correct.

Richard, as you have written the original code, could you check this is
correct?

Laurent