linux-kernel - Re: [PATCH 17/28] nios2: Signal handling support

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Message-ID: <5358E27F.2000206@nod.at>
Date:	Thu, 24 Apr 2014 12:07:59 +0200
From:	Richard Weinberger <richard@....at>
To:	Ley Foon Tan <lftan@...era.com>
CC:	Linux-Arch <linux-arch@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	cltang@...esourcery.com
Subject: Re: [PATCH 17/28] nios2: Signal handling support

Am 24.04.2014 12:01, schrieb Ley Foon Tan:
> On Sun, Apr 20, 2014 at 3:29 AM, Richard Weinberger
 >>> +
>>> +       push_cache((unsigned long) &frame->retcode);
>>> +
>>> +       /* Set up registers for signal handler */
>>> +       regs->sp = (unsigned long) frame;
>>> +       regs->r4 = (unsigned long) (current_thread_info()->exec_domain
>>> +                       && current_thread_info()->exec_domain->signal_invmap
>>> +                       && sig < 32
>>> +                       ? current_thread_info()->exec_domain->signal_invmap[sig]
>>> +                       : sig);
>>
>> Does nios2 really need signal translation and supports execution domains?
> Nios2 have one default "default_exec_domain" only. So, we can change
> this to "regs->r4 = sig;".

Nice.

> BTW, most of the architectures have similar code.

Yep, because everyone is copy&pasting from each others without thinking. 8)
There is already a cleanup going on: https://lkml.org/lkml/2014/3/2/198

Thanks,
//richard
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