Re: [Qemu-devel] [PATCH] linux-user: add pselect6 syscall support

[Mike Frysinger]

On Fri, Jun 3, 2011 at 14:10, riku voipio wrote:
> On 05/18/2011 03:14 AM, Mike Frysinger wrote:
>> Some architectures (like Blackfin) only implement pselect6 (and skip
>> select/newselect).  So add support for it using existing newselect code.
>
> There is a blackfin qemu?

i posted it to the list for feedback, but i havent followed up since

> Anyways, with this patch pselect01 ltp testcase
> starts failing. Looks like (at least on arm), arg6 is set and valid pointer,
> but arg7[0] is 0, which quite doesn't work as lock_user read target...
>
> Checking if arg7==0 and setting sig_ptr to null in that case makes the
> testcase to work, but is that correct?

looking at the kernel code, it accepts a 6th arg which contains a NULL
pointer (and then just ignores it), so i'll do the same
-mike