diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/x86_emulate.c | 50 |
1 files changed, 34 insertions, 16 deletions
diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c index 0c120c4c9c0..4390ec8c47a 100644 --- a/arch/x86/kvm/x86_emulate.c +++ b/arch/x86/kvm/x86_emulate.c @@ -47,25 +47,26 @@ #define ImplicitOps (1<<1) /* Implicit in opcode. No generic decode. */ #define DstReg (2<<1) /* Register operand. */ #define DstMem (3<<1) /* Memory operand. */ -#define DstMask (3<<1) +#define DstAcc (4<<1) /* Destination Accumulator */ +#define DstMask (7<<1) /* Source operand type. */ -#define SrcNone (0<<3) /* No source operand. */ -#define SrcImplicit (0<<3) /* Source operand is implicit in the opcode. */ -#define SrcReg (1<<3) /* Register operand. */ -#define SrcMem (2<<3) /* Memory operand. */ -#define SrcMem16 (3<<3) /* Memory operand (16-bit). */ -#define SrcMem32 (4<<3) /* Memory operand (32-bit). */ -#define SrcImm (5<<3) /* Immediate operand. */ -#define SrcImmByte (6<<3) /* 8-bit sign-extended immediate operand. */ -#define SrcMask (7<<3) +#define SrcNone (0<<4) /* No source operand. */ +#define SrcImplicit (0<<4) /* Source operand is implicit in the opcode. */ +#define SrcReg (1<<4) /* Register operand. */ +#define SrcMem (2<<4) /* Memory operand. */ +#define SrcMem16 (3<<4) /* Memory operand (16-bit). */ +#define SrcMem32 (4<<4) /* Memory operand (32-bit). */ +#define SrcImm (5<<4) /* Immediate operand. */ +#define SrcImmByte (6<<4) /* 8-bit sign-extended immediate operand. */ +#define SrcMask (7<<4) /* Generic ModRM decode. */ -#define ModRM (1<<6) +#define ModRM (1<<7) /* Destination is only written; never read. */ -#define Mov (1<<7) -#define BitOp (1<<8) -#define MemAbs (1<<9) /* Memory operand is absolute displacement */ -#define String (1<<10) /* String instruction (rep capable) */ -#define Stack (1<<11) /* Stack instruction (push/pop) */ +#define Mov (1<<8) +#define BitOp (1<<9) +#define MemAbs (1<<10) /* Memory operand is absolute displacement */ +#define String (1<<12) /* String instruction (rep capable) */ +#define Stack (1<<13) /* Stack instruction (push/pop) */ #define Group (1<<14) /* Bits 3:5 of modrm byte extend opcode */ #define GroupDual (1<<15) /* Alternate decoding of mod == 3 */ #define GroupMask 0xff /* Group number stored in bits 0:7 */ @@ -1060,6 +1061,23 @@ done_prefixes: } c->dst.type = OP_MEM; break; + case DstAcc: + c->dst.type = OP_REG; + c->dst.bytes = c->op_bytes; + c->dst.ptr = &c->regs[VCPU_REGS_RAX]; + switch (c->op_bytes) { + case 1: + c->dst.val = *(u8 *)c->dst.ptr; + break; + case 2: + c->dst.val = *(u16 *)c->dst.ptr; + break; + case 4: + c->dst.val = *(u32 *)c->dst.ptr; + break; + } + c->dst.orig_val = c->dst.val; + break; } if (c->rip_relative) |