From: Yao Qi <yao@codesourcery.com>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: Mark Kettenis <mark.kettenis@xs4all.nl>, gdb-patches@sourceware.org
Subject: Re: [patch] Handle return small struct in rs600 (size is not 4/8)
Date: Tue, 16 Aug 2011 01:41:00 -0000 [thread overview]
Message-ID: <4E49CAB1.1090405@codesourcery.com> (raw)
In-Reply-To: <m239h2jyk2.fsf@igel.home>
On 08/16/2011 02:54 AM, Andreas Schwab wrote:
> Yao Qi <yao@codesourcery.com> writes:
>
>> I think the description "shall be returned in r3 and r4, as if they were
>> first stored in memory area and then the low-addressed word were loaded
>> in r3 ...." is not very clear on the length of data. In this case,
>> struct C variable is returned, and its content is 0x61 0x62 0x63. They
>> (3 bytes) are stored in memory, and (3 bytes) are loaded into r3. Since
>> 3 bytes, not 4, are loaded to r3
>
> When you load a (32-bit) register from memory, you always read 4 bytes.
>
Andreas, thanks for your clarification. Please ignore my patch, and
sorry for the noise.
--
Yao (é½å°§)
next prev parent reply other threads:[~2011-08-16 1:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-15 15:22 Yao Qi
2011-08-15 15:42 ` [patch] Handle return small struct in ppc " Yao Qi
2011-08-15 16:06 ` [patch] Handle return small struct in rs600 " Mark Kettenis
2011-08-15 16:56 ` Yao Qi
2011-08-15 17:27 ` Pedro Alves
2011-08-15 18:54 ` Andreas Schwab
2011-08-16 1:41 ` Yao Qi [this message]
2011-08-15 17:57 ` Andreas Schwab
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