diff options
| author | Avi Kivity <avi@redhat.com> | 2012-01-16 15:08:44 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-03-05 14:52:42 +0200 |
| commit | 28867cee754c07b3fa0a679ed2ea394843130217 (patch) | |
| tree | ca9b23901a25dbe749b9e5ce1fbe535ee083b40c /arch | |
| parent | 54f65795c8f6e192540756085d738e66ab0917a0 (diff) | |
| download | op-kernel-dev-28867cee754c07b3fa0a679ed2ea394843130217.zip op-kernel-dev-28867cee754c07b3fa0a679ed2ea394843130217.tar.gz | |
KVM: x86 emulator: add 8-bit memory operands
Useful for MOVSX/MOVZX.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 0982507..5da6b36 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -57,6 +57,7 @@ #define OpDS 23ull /* DS */ #define OpFS 24ull /* FS */ #define OpGS 25ull /* GS */ +#define OpMem8 26ull /* 8-bit zero extended memory operand */ #define OpBits 5 /* Width of operand field */ #define OpMask ((1ull << OpBits) - 1) @@ -101,6 +102,7 @@ #define SrcAcc (OpAcc << SrcShift) #define SrcImmU16 (OpImmU16 << SrcShift) #define SrcDX (OpDX << SrcShift) +#define SrcMem8 (OpMem8 << SrcShift) #define SrcMask (OpMask << SrcShift) #define BitOp (1<<11) #define MemAbs (1<<12) /* Memory operand is absolute displacement */ @@ -3656,6 +3658,9 @@ static int decode_operand(struct x86_emulate_ctxt *ctxt, struct operand *op, case OpImm: rc = decode_imm(ctxt, op, imm_size(ctxt), true); break; + case OpMem8: + ctxt->memop.bytes = 1; + goto mem_common; case OpMem16: ctxt->memop.bytes = 2; goto mem_common; |
