KVM: fix sil/dil/bpl/spl in the mod/rm fields (8acb4207) · Commits · 戴 / test

The x86-64 extended low-byte registers were fetched correctly from reg, but not from mod/rm. This fixes another bug in the boot of RHEL5.9 64-bit, but it is still not enough. Cc: <stable@vger.kernel.org> # 3.9 Signed-off-by:

Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:

Gleb Natapov <gleb@redhat.com>

arch/x86/kvm/emulate.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -1240,9 +1240,12 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt,
		ctxt->modrm_seg = VCPU_SREG_DS;

		if (ctxt->modrm_mod == 3) {
		int highbyte_regs = ctxt->rex_prefix == 0;

		op->type = OP_REG;
		op->bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes;
		op->addr.reg = decode_register(ctxt, ctxt->modrm_rm, ctxt->d & ByteOp);
		op->addr.reg = decode_register(ctxt, ctxt->modrm_rm,
		highbyte_regs && (ctxt->d & ByteOp));
		if (ctxt->d & Sse) {
		op->type = OP_XMM;
		op->bytes = 16;

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