Hi Avi,
Attached is the patch to correct the implementation of instruction:
cmp
opcodes: 0x3c, 0x3d
Please Apply.
--
Thanks & Regards,
Nitin
Open Source Technology Center, Intel Corporation
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commit 637711de0b9b2431c32cfdd880fed6baabec3982 Author: Nitin A Kamble <[EMAIL PROTECTED]> Date: Thu Sep 13 19:52:21 2007 -0700
Correct emulation of instruction
cmp
opcodes: 0x3c & 0x3d
Signed-off-by: Nitin A Kamble <[EMAIL PROTECTED]>
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index 5ca4626..2e4c631 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -985,10 +985,31 @@ done_prefixes:
xor: /* xor */
emulate_2op_SrcV("xor", src, dst, _eflags);
break;
- case 0x38 ... 0x3d:
+ case 0x38 ... 0x3b:
cmp: /* cmp */
emulate_2op_SrcV("cmp", src, dst, _eflags);
break;
+ case 0x3c:
+ dst.type = OP_REG;
+ dst.ptr = &_regs[VCPU_REGS_RAX];
+ dst.val = *(u8 *)dst.ptr;
+ dst.bytes = 1;
+ dst.orig_val = dst.val;
+ goto cmp;
+ case 0x3d:
+ dst.ptr = (unsigned long *) &_regs[VCPU_REGS_RAX];
+ switch ((dst.bytes = op_bytes)) {
+ case 2:
+ dst.val = *(u16 *) dst.ptr;
+ break;
+ case 4:
+ dst.val = *(u32 *) dst.ptr;
+ break;
+ case 8:
+ dst.val = *(u64 *) dst.ptr;
+ break;
+ }
+ goto cmp;
case 0x63: /* movsxd */
if (mode != X86EMUL_MODE_PROT64)
goto cannot_emulate;
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