All of lore.kernel.org
 help / color / mirror / Atom feed
From: Mohammed Gamal <m.gamal005@gmail.com>
To: kvm@vger.kernel.org
Cc: avi@qumranet.com, riel@surriel.com
Subject: [PATCH][RESEND] x86_emulator: Emulate cld and std instruction
Date: Thu, 31 Jul 2008 00:27:27 +0300	[thread overview]
Message-ID: <20080730212727.GA7708@mohd-laptop> (raw)

This patch adds 'cld' and 'std' instructions to the emulator

Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>

---
 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



             reply	other threads:[~2008-07-30 21:27 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-07-30 21:27 Mohammed Gamal [this message]
2008-07-31  9:57 ` [PATCH][RESEND] x86_emulator: Emulate cld and std instruction Avi Kivity
2008-07-31 10:25   ` Mohammed Gamal
2008-07-31 10:50     ` Avi Kivity
2008-07-31 13:27       ` Mohammed Gamal
2008-07-31 18:16     ` Andrea Arcangeli

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20080730212727.GA7708@mohd-laptop \
    --to=m.gamal005@gmail.com \
    --cc=avi@qumranet.com \
    --cc=kvm@vger.kernel.org \
    --cc=riel@surriel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.