* [PATCH] x86 emulator: Emulate cld and std instructions
@ 2008-07-30 21:08 Mohammed Gamal
2008-07-30 21:20 ` Mohammed Gamal
0 siblings, 1 reply; 2+ messages in thread
From: Mohammed Gamal @ 2008-07-30 21:08 UTC (permalink / raw)
To: kvm; +Cc: avi, riel
This patch adds instructions 'cld' and 'std' to the emulator.
Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
---
>From 23c0868c6a48a5e75693bd4552255a89cf26bdc8 Mon Sep 17 00:00:00 2001
From: Mohammed Gamal <mohd@mohd-laptop.(none)>
Date: Thu, 31 Jul 2008 00:04:34 +0300
Subject: [PATCH] Emulate cld and std instructions
---
arch/x86/kvm/x86_emulate.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c
index d5da7f1..9c72a77 100644
--- a/arch/x86/kvm/x86_emulate.c
+++ b/arch/x86/kvm/x86_emulate.c
@@ -1755,6 +1755,14 @@ special_insn:
ctxt->eflags |= X86_EFLAGS_IF;
c->dst.type = OP_NONE; /* Disable writeback. */
break;
+ case 0xfc: /* cld */
+ ctxt->eflags &= ~EFLG_DF;
+ c->dst.type = OP_NONE; /* Disable writeback. */
+ break;
+ case 0xfd: /* std */
+ ctxt->eflags |= EFLG_DF;
+ c->dst.type = OP_NONE; /* Disable writeback. */
+ break;
case 0xfe ... 0xff: /* Grp4/Grp5 */
rc = emulate_grp45(ctxt, ops);
if (rc != 0)
--
1.5.4.3
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] x86 emulator: Emulate cld and std instructions
2008-07-30 21:08 [PATCH] x86 emulator: Emulate cld and std instructions Mohammed Gamal
@ 2008-07-30 21:20 ` Mohammed Gamal
0 siblings, 0 replies; 2+ messages in thread
From: Mohammed Gamal @ 2008-07-30 21:20 UTC (permalink / raw)
To: kvm
On Thu, Jul 31, 2008 at 12:08 AM, Mohammed Gamal <m.gamal005@gmail.com> wrote:
> This patch adds instructions 'cld' and 'std' to the emulator.
>
> Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
> ---
> From 23c0868c6a48a5e75693bd4552255a89cf26bdc8 Mon Sep 17 00:00:00 2001
> From: Mohammed Gamal <mohd@mohd-laptop.(none)>
> Date: Thu, 31 Jul 2008 00:04:34 +0300
> Subject: [PATCH] Emulate cld and std instructions
>
> ---
> arch/x86/kvm/x86_emulate.c | 8 ++++++++
> 1 files changed, 8 insertions(+), 0 deletions(-)
>
> diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c
> index d5da7f1..9c72a77 100644
> --- a/arch/x86/kvm/x86_emulate.c
> +++ b/arch/x86/kvm/x86_emulate.c
> @@ -1755,6 +1755,14 @@ special_insn:
> ctxt->eflags |= X86_EFLAGS_IF;
> c->dst.type = OP_NONE; /* Disable writeback. */
> break;
> + case 0xfc: /* cld */
> + ctxt->eflags &= ~EFLG_DF;
> + c->dst.type = OP_NONE; /* Disable writeback. */
> + break;
> + case 0xfd: /* std */
> + ctxt->eflags |= EFLG_DF;
> + c->dst.type = OP_NONE; /* Disable writeback. */
> + break;
> case 0xfe ... 0xff: /* Grp4/Grp5 */
> rc = emulate_grp45(ctxt, ops);
> if (rc != 0)
> --
> 1.5.4.3
>
Please ignore this patch due to format errors. I will resend it.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2008-07-30 21:20 ` Mohammed Gamal
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