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d="scan'208";a="122825024" From: Andrew Cooper To: Xen-devel CC: Andrew Cooper , Jan Beulich , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= , Wei Liu , Jinoh Kang Subject: [PATCH 1/7] x86/emul: ASSERT that X86EMUL_DONE doesn't escape to callers Date: Fri, 15 Sep 2023 21:36:22 +0100 Message-ID: <20230915203628.837732-2-andrew.cooper3@citrix.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230915203628.837732-1-andrew.cooper3@citrix.com> References: <20230915203628.837732-1-andrew.cooper3@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @citrix.com) X-ZM-MESSAGEID: 1694810229759100001 This property is far from clear. Signed-off-by: Andrew Cooper Reviewed-by: Jan Beulich --- CC: Jan Beulich CC: Roger Pau Monn=C3=A9 CC: Wei Liu CC: Jinoh Kang v2: * New --- xen/arch/x86/x86_emulate/x86_emulate.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/xen/arch/x86/x86_emulate/x86_emulate.c b/xen/arch/x86/x86_emul= ate/x86_emulate.c index e88245eae9fb..94caec1d142c 100644 --- a/xen/arch/x86/x86_emulate/x86_emulate.c +++ b/xen/arch/x86/x86_emulate/x86_emulate.c @@ -8651,6 +8651,12 @@ int x86_emulate_wrapper( =20 rc =3D x86_emulate(ctxt, ops); =20 + /* + * X86EMUL_DONE is an internal signal in the emulator, and is not expe= cted + * to ever escape out to callers. + */ + ASSERT(rc !=3D X86EMUL_DONE); + /* * Most retire flags should only be set for successful instruction * emulation. --=20 2.30.2