From: David Gibson <david@gibson.dropbear.id.au>
To: Jakub Horak <thement@ibawizard.net>
Cc: qemu-devel@nongnu.org, qemu-ppc@nongnu.org
Subject: Re: [Qemu-devel] Bug in ppc/BookE wait instruction
Date: Mon, 6 Jun 2016 11:34:41 +1000 [thread overview]
Message-ID: <20160606013441.GF9226@voom.fritz.box> (raw)
In-Reply-To: <20160603154549.GA31406@ibawizard>
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On Fri, Jun 03, 2016 at 05:45:49PM +0200, Jakub Horak wrote:
> Hello,
> I think there's a bug in "wait" instruction code generator for PowerPC
> architecture. It doesn't make sense to store a non-initialized register.
>
> Best regards,
> Jakub Horak
The fix looks correct, but I need a Signed-off-by line in order to
apply it.
In future, please send such patches to myself and Alex Graf
(target-ppc maintainers) the qemu-ppc list as well as qemu-devel. I
wouldn't have spotted this if Marc Cave-Ayland hadn't copied it to me.
>
>
> diff --git a/target-ppc/translate.c b/target-ppc/translate.c
> index f5ceae5..6af567b 100644
> --- a/target-ppc/translate.c
> +++ b/target-ppc/translate.c
> @@ -3439,7 +3439,7 @@ static void gen_sync(DisasContext *ctx)
> /* wait */
> static void gen_wait(DisasContext *ctx)
> {
> - TCGv_i32 t0 = tcg_temp_new_i32();
> + TCGv_i32 t0 = tcg_const_i32(1);
> tcg_gen_st_i32(t0, cpu_env,
> -offsetof(PowerPCCPU, env) + offsetof(CPUState, halted));
> tcg_temp_free_i32(t0);
>
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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next prev parent reply other threads:[~2016-06-06 1:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-03 15:45 [Qemu-devel] Bug in ppc/BookE wait instruction Jakub Horak
2016-06-03 17:11 ` Mark Cave-Ayland
2016-06-06 1:34 ` David Gibson [this message]
2016-06-06 8:47 ` Jakub Horak
2016-06-15 4:06 ` [Qemu-devel] [Qemu-ppc] " David Gibson
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