On Thu, Jan 06, 2011 at 03:42:55PM +0100, Mario 'BitKoenig' Holbe wrote:
>
> holbe@ideapad ~ % gcc -o via-rng-test via-rng-test.c
> holbe@ideapad ~ % ./via-rng-test
> 0xbff09d40: 00000000
> ecx: aa55aa55 edx: ffffff03 edi: 0xbff09d40
> ecx: aa55aa55 edx: 00000003 edi: 0xbff09d48
> 0xbff09d40: 339d4525
> holbe@ideapad ~ %
Thanks, I've applied this patch:
commit 0735ac1f2551d9f9d356126aaf3b1110150918e6
Author: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Fri Jan 7 14:48:57 2011 +1100
hwrng: via_rng - Fix asm constraints
The inline asm to invoke xstore did not specify the constraints
correctly. In particular, dx/di should have been marked as output
registers as well as input as they're modified by xstore.
Thanks to Mario Holbe for creating this patch and testing it.
Tested-by: Mario 'BitKoenig' Holbe <Mario.Holbe@xxxxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
diff --git a/drivers/char/hw_random/via-rng.c b/drivers/char/hw_random/via-rng.c
index 794aacb..7f86666 100644
--- a/drivers/char/hw_random/via-rng.c
+++ b/drivers/char/hw_random/via-rng.c
@@ -81,8 +81,7 @@ static inline u32 xstore(u32 *addr, u32 edx_in)
ts_state = irq_ts_save();
asm(".byte 0x0F,0xA7,0xC0 /* xstore %%edi (addr=%0) */"
- :"=m"(*addr), "=a"(eax_out)
- :"D"(addr), "d"(edx_in));
+ : "=m" (*addr), "=a" (eax_out), "+d" (edx_in), "+D" (addr));
irq_ts_restore(ts_state);
return eax_out;
Cheers,
--
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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