From: Johnny Hung <johnny.hacking@gmail.com>
To: kernelnewbies@nl.linux.org, linux-kernel@vger.kernel.org,
linux-embedded@vger.kernel.org
Subject: How to move two valuables to x86 CPU register ebx, ecx by using AT&A inline asm.
Date: Thu, 19 Nov 2009 17:50:30 +0800 [thread overview]
Message-ID: <cb9ecdfa0911190150w4edbacdfp24a7069c618193f4@mail.gmail.com> (raw)
Hi All:
I want to move two local valuables to x86 arch CPU ebx, ecx
register and do outb cpu instruction by using AT&A inline asm in
kernel driver. The following code was I wrote but gcc report syntax
error:
==
unsigned int val = 10;
unsigned int tmp = 5;
....
__asm__ volatile ("movl %0, %%ebx"
"movl %1, %%ecx"
"outb $0x27, $0xb2"
:
:"r"(val), "r"(tmp)
:"%ebx", "%ecx"
);
Does anyone can point me out. Any reply is appreciated.
BRs, H. Johnny
next reply other threads:[~2009-11-19 9:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-19 9:50 Johnny Hung [this message]
2009-11-19 10:05 ` How to move two valuables to x86 CPU register ebx, ecx by using AT&A inline asm Viral Mehta
2009-11-19 10:19 ` Johnny Hung
2009-11-19 10:21 ` Viral Mehta
2009-11-19 11:11 ` Johnny Hung
2009-11-20 6:04 ` stas
2009-11-20 10:43 ` David Woodhouse
2009-11-20 6:48 ` Américo Wang
2009-11-20 8:45 ` Jiri Slaby
2009-11-23 3:14 ` Johnny Hung
2009-11-23 5:43 ` Brian Gerst
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