From: Andreas Schwab <schwab@linux-m68k.org>
To: Yao Qi <yao@codesourcery.com>
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: Mon, 15 Aug 2011 18:54:00 -0000 [thread overview]
Message-ID: <m239h2jyk2.fsf@igel.home> (raw)
In-Reply-To: <4E494FA9.9000402@codesourcery.com> (Yao Qi's message of "Tue, 16 Aug 2011 00:56:09 +0800")
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.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
next prev parent reply other threads:[~2011-08-15 18:54 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 [this message]
2011-08-16 1:41 ` Yao Qi
2011-08-15 17:57 ` Andreas Schwab
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