From: Hans-Christian Egtvedt <egtvedt@samfundet.no>
To: "Håvard Skinnemoen" <hskinnemoen@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>,
Matthias Brugger <matthias.bgg@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
David Howells <dhowells@redhat.com>,
Dave Jones <davej@redhat.com>, Will Deacon <will.deacon@arm.com>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] arch: avr32: add dummy syscalls
Date: Tue, 5 Feb 2013 09:06:37 +0100 [thread overview]
Message-ID: <20130205080637.GA22497@samfundet.no> (raw)
In-Reply-To: <CACiLriQeYGGj5WZrf8H8z5N-AG1z_tDH7cXsd1J7ptpqYenPpw@mail.gmail.com>
Around Mon 04 Feb 2013 08:34:47 -0800 or thereabout, Håvard Skinnemoen wrote:
> On Mon, Feb 4, 2013 at 7:39 AM, Al Viro <viro@zeniv.linux.org.uk> wrote:
>> On Sun, Feb 03, 2013 at 09:35:39PM -0800, H?vard Skinnemoen wrote:
>>>
>>> > But yes, 32bit/32bit/64bit/32bit is another interesting case -
>>> > fanotify_mark is 32/32/64/32/32. From what ABI says it would seem to
>>> > be r12/r11/r8:r9/r10/stack, but if I understand you correctly, we'll
>>> > end up wanting *two* arguments on stack...
>>>
>>> Yes, I think there may be a difference between the IAR and gcc ABI
>>> here. But I could be wrong.
>>
>> So it will use the gap in case of 32/32/64/32; the first two calls will
>> take index 0 and 1 (r12 and r11 resp.), the third will take 3 and 4
>> (r9:r8) and the fourth will take 2 (r10).
>
> Oh, cool. I guess I am wrong then. Thanks a lot for taking the time to
> figure this out, and sorry I misled you.
>
> If someone's got the toolchain installed (which I don't, sorry), it
> should be relatively straightforward to verify this by looking at the
> disassembly of a call to a function with a similar prototype.
The last avr32-linux toolchain I was able to build was 4.2.x, the openwrt
people got 4.3.x to build and produce a bootable system.
I have not tested the 4.4.x GCC port from Atmel.
--
mvh
Hans-Christian Egtvedt
next prev parent reply other threads:[~2013-02-05 8:06 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-27 12:50 [PATCH] arch: avr32: add dummy syscalls Matthias Brugger
2013-01-27 19:57 ` Hans-Christian Egtvedt
2013-01-27 20:30 ` Al Viro
2013-01-27 20:39 ` Hans-Christian Egtvedt
2013-02-04 0:10 ` Al Viro
2013-02-04 0:30 ` Al Viro
2013-02-04 1:31 ` Al Viro
2013-02-04 3:02 ` Al Viro
2013-02-04 4:52 ` Håvard Skinnemoen
2013-02-04 5:05 ` Al Viro
2013-02-04 5:35 ` Håvard Skinnemoen
2013-02-04 15:39 ` Al Viro
2013-02-04 16:34 ` Håvard Skinnemoen
2013-02-04 22:53 ` Al Viro
2013-02-05 8:06 ` Hans-Christian Egtvedt [this message]
2013-02-04 3:21 ` H. Peter Anvin
2013-01-28 2:45 ` Håvard Skinnemoen
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