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KVM: x86 emulator: handle undecoded rex.b with r/m = 5 in certain cases

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x86_64 does not decode rex.b in certain cases, where the r/m field = 5.

Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity 2008-06-15 21:13:41 -07:00
parent b13354f8f0
commit 8684c0af0b
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kvm/x86_emulate.c
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@ -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)