From: Timur Tabi <timur@freescale.com>
To: Scott Wood <scottwood@freescale.com>
Cc: Alexander Graf <agraf@suse.de>,
Stuart Yoder <stuart.yoder@freescale.com>,
kvm-ppc@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [PATCH v11 8/8] PPC: Don't use hardcoded opcode for ePAPR hcall invocation
Date: Mon, 02 Jul 2012 17:34:40 +0000 [thread overview]
Message-ID: <4FF1DBB0.1080909@freescale.com> (raw)
In-Reply-To: <4FF1D988.3040602@freescale.com>
Scott Wood wrote:
> Hmm. The comment says, "XER, CTR, and LR are currently listed as
> clobbers because it's uncertain whether they will be clobbered." Maybe
> it dates back to when the ABI was still being discussed? Timur, do you
> recall?
Nope, sorry. I'm sure we discussed this and looked at the code. My guess
is that we weren't certain what the compiler was going to do at the time.
I'm still a little confused. Which inline assembly code is clobbering LR?
Are you talking about the "BL" instruction, which wasn't there before?
--
Timur Tabi
Linux kernel developer at Freescale
WARNING: multiple messages have this Message-ID (diff)
From: Timur Tabi <timur@freescale.com>
To: Scott Wood <scottwood@freescale.com>
Cc: Alexander Graf <agraf@suse.de>,
Stuart Yoder <stuart.yoder@freescale.com>,
<kvm-ppc@vger.kernel.org>, <kvm@vger.kernel.org>
Subject: Re: [PATCH v11 8/8] PPC: Don't use hardcoded opcode for ePAPR hcall invocation
Date: Mon, 2 Jul 2012 12:34:40 -0500 [thread overview]
Message-ID: <4FF1DBB0.1080909@freescale.com> (raw)
In-Reply-To: <4FF1D988.3040602@freescale.com>
Scott Wood wrote:
> Hmm. The comment says, "XER, CTR, and LR are currently listed as
> clobbers because it's uncertain whether they will be clobbered." Maybe
> it dates back to when the ABI was still being discussed? Timur, do you
> recall?
Nope, sorry. I'm sure we discussed this and looked at the code. My guess
is that we weren't certain what the compiler was going to do at the time.
I'm still a little confused. Which inline assembly code is clobbering LR?
Are you talking about the "BL" instruction, which wasn't there before?
--
Timur Tabi
Linux kernel developer at Freescale
next prev parent reply other threads:[~2012-07-02 17:34 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-22 20:06 [PATCH v11 8/8] PPC: Don't use hardcoded opcode for ePAPR hcall invocation Stuart Yoder
2012-06-22 20:06 ` Stuart Yoder
2012-07-02 12:30 ` Alexander Graf
2012-07-02 12:30 ` Alexander Graf
2012-07-02 17:10 ` Scott Wood
2012-07-02 17:10 ` Scott Wood
2012-07-02 17:13 ` Alexander Graf
2012-07-02 17:13 ` Alexander Graf
2012-07-02 17:16 ` Scott Wood
2012-07-02 17:16 ` Scott Wood
2012-07-02 17:17 ` Alexander Graf
2012-07-02 17:17 ` Alexander Graf
2012-07-02 17:25 ` Scott Wood
2012-07-02 17:25 ` Scott Wood
2012-07-02 17:34 ` Timur Tabi [this message]
2012-07-02 17:34 ` Timur Tabi
2012-07-02 17:43 ` Scott Wood
2012-07-02 17:43 ` Scott Wood
2012-07-02 17:53 ` Timur Tabi
2012-07-02 17:53 ` Timur Tabi
2012-07-02 17:57 ` Scott Wood
2012-07-02 17:57 ` Scott Wood
2012-07-02 18:02 ` Timur Tabi
2012-07-02 18:02 ` Timur Tabi
2012-07-03 15:22 ` Yoder Stuart-B08248
2012-07-03 15:22 ` Yoder Stuart-B08248
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