From 8684c0af0b2bab770c257e2a04e1546eed35fa56 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Sun, 15 Jun 2008 21:13:41 -0700 Subject: [PATCH] KVM: x86 emulator: handle undecoded rex.b with r/m = 5 in certain cases x86_64 does not decode rex.b in certain cases, where the r/m field = 5. Signed-off-by: Avi Kivity --- arch/x86/kvm/x86_emulate.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c index 2808291391..3721cfddc9 100644 --- a/arch/x86/kvm/x86_emulate.c +++ b/arch/x86/kvm/x86_emulate.c @@ -750,6 +750,7 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt, switch (base_reg) { case 5: + case 13: if (c->modrm_mod != 0) c->modrm_ea += c->regs[base_reg]; else @@ -767,6 +768,7 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt, } break; case 5: + case 13: if (c->modrm_mod != 0) c->modrm_ea += c->regs[c->modrm_rm]; else if (ctxt->mode == X86EMUL_MODE_PROT64) -- 2.39.5