On 11/19/2009 10:50 AM, Johnny Hung wrote:
> 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.
Why not just:
("outb $0x27, %%al" : : "a" (0xb2), "b"(val), "c" (tmp));
--
js
Faculty of Informatics, Masaryk University
Suse Labs, Novell
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