* [PATCH] KVM: Emulator: Opcode 0x80 gets a byte immediate
@ 2012-04-27 14:23 Nadav Amit
2012-04-29 8:22 ` Gleb Natapov
0 siblings, 1 reply; 2+ messages in thread
From: Nadav Amit @ 2012-04-27 14:23 UTC (permalink / raw)
To: avi, mtosatti; +Cc: tglx, mingo, hpa, kvm, linux-kernel, x86, Nadav Amit
The single byte opcode 0x80 should get a byte immediate.
The previous emulation is broken for opcode 0x80.
---
arch/x86/kvm/emulate.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 8375622..dd53e53 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -3464,7 +3464,7 @@ static struct opcode opcode_table[256] = {
/* 0x70 - 0x7F */
X16(D(SrcImmByte)),
/* 0x80 - 0x87 */
- G(ByteOp | DstMem | SrcImm | ModRM | Group, group1),
+ G(ByteOp | DstMem | SrcImmByte | ModRM | Group, group1),
G(DstMem | SrcImm | ModRM | Group, group1),
G(ByteOp | DstMem | SrcImm | ModRM | No64 | Group, group1),
G(DstMem | SrcImmByte | ModRM | Group, group1),
--
1.7.4.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] KVM: Emulator: Opcode 0x80 gets a byte immediate
2012-04-27 14:23 [PATCH] KVM: Emulator: Opcode 0x80 gets a byte immediate Nadav Amit
@ 2012-04-29 8:22 ` Gleb Natapov
0 siblings, 0 replies; 2+ messages in thread
From: Gleb Natapov @ 2012-04-29 8:22 UTC (permalink / raw)
To: Nadav Amit; +Cc: avi, mtosatti, tglx, mingo, hpa, kvm, linux-kernel, x86
On Fri, Apr 27, 2012 at 05:23:36PM +0300, Nadav Amit wrote:
> The single byte opcode 0x80 should get a byte immediate.
> The previous emulation is broken for opcode 0x80.
It is not. That what ByteOp is about.
> ---
> arch/x86/kvm/emulate.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
> index 8375622..dd53e53 100644
> --- a/arch/x86/kvm/emulate.c
> +++ b/arch/x86/kvm/emulate.c
> @@ -3464,7 +3464,7 @@ static struct opcode opcode_table[256] = {
> /* 0x70 - 0x7F */
> X16(D(SrcImmByte)),
> /* 0x80 - 0x87 */
> - G(ByteOp | DstMem | SrcImm | ModRM | Group, group1),
> + G(ByteOp | DstMem | SrcImmByte | ModRM | Group, group1),
> G(DstMem | SrcImm | ModRM | Group, group1),
> G(ByteOp | DstMem | SrcImm | ModRM | No64 | Group, group1),
> G(DstMem | SrcImmByte | ModRM | Group, group1),
> --
> 1.7.4.1
>
> --
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--
Gleb.
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2012-04-27 14:23 [PATCH] KVM: Emulator: Opcode 0x80 gets a byte immediate Nadav Amit
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