diff options
| author | Wei Yongjun <yjwei@cn.fujitsu.com> | 2010-07-07 09:43:35 (GMT) |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-08-02 03:40:27 (GMT) |
| commit | 5d55f299f97769130c6cc67896414c988db309ab (patch) | |
| tree | 4b18d7721ff788e8bda93e57086037e1d6ac195b /arch/x86/kvm/emulate.c | |
| parent | 07cbc6c185aee2c0479776845988242a040c7c93 (diff) | |
| download | linux-5d55f299f97769130c6cc67896414c988db309ab.tar.xz | |
KVM: x86 emulator: re-implementing 'mov AL,moffs' instruction decoding
This patch change to use DstAcc for decoding 'mov AL, moffs'
and introduced SrcAcc for decoding 'mov moffs, AL'.
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/emulate.c')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 286572a..255473f 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -70,6 +70,7 @@ #define SrcSI (0xa<<4) /* Source is in the DS:RSI */ #define SrcImmFAddr (0xb<<4) /* Source is immediate far address */ #define SrcMemFAddr (0xc<<4) /* Source is far address in memory */ +#define SrcAcc (0xd<<4) /* Source Accumulator */ #define SrcMask (0xf<<4) /* Generic ModRM decode. */ #define ModRM (1<<8) @@ -177,8 +178,8 @@ static u32 opcode_table[256] = { 0, 0, SrcImmFAddr | No64, 0, ImplicitOps | Stack, ImplicitOps | Stack, 0, 0, /* 0xA0 - 0xA7 */ - ByteOp | DstReg | SrcMem | Mov | MemAbs, DstReg | SrcMem | Mov | MemAbs, - ByteOp | DstMem | SrcReg | Mov | MemAbs, DstMem | SrcReg | Mov | MemAbs, + ByteOp | DstAcc | SrcMem | Mov | MemAbs, DstAcc | SrcMem | Mov | MemAbs, + ByteOp | DstMem | SrcAcc | Mov | MemAbs, DstMem | SrcAcc | Mov | MemAbs, ByteOp | SrcSI | DstDI | Mov | String, SrcSI | DstDI | Mov | String, ByteOp | SrcSI | DstDI | String, SrcSI | DstDI | String, /* 0xA8 - 0xAF */ @@ -1186,6 +1187,25 @@ done_prefixes: else c->src.val = insn_fetch(u8, 1, c->eip); break; + case SrcAcc: + c->src.type = OP_REG; + c->src.bytes = (c->d & ByteOp) ? 1 : c->op_bytes; + c->src.ptr = &c->regs[VCPU_REGS_RAX]; + switch (c->src.bytes) { + case 1: + c->src.val = *(u8 *)c->src.ptr; + break; + case 2: + c->src.val = *(u16 *)c->src.ptr; + break; + case 4: + c->src.val = *(u32 *)c->src.ptr; + break; + case 8: + c->src.val = *(u64 *)c->src.ptr; + break; + } + break; case SrcOne: c->src.bytes = 1; c->src.val = 1; @@ -2854,13 +2874,7 @@ special_insn: if (rc != X86EMUL_CONTINUE) goto done; break; - case 0xa0 ... 0xa1: /* mov */ - c->dst.ptr = (unsigned long *)&c->regs[VCPU_REGS_RAX]; - c->dst.val = c->src.val; - break; - case 0xa2 ... 0xa3: /* mov */ - c->dst.val = (unsigned long)c->regs[VCPU_REGS_RAX]; - break; + case 0xa0 ... 0xa3: /* mov */ case 0xa4 ... 0xa5: /* movs */ goto mov; case 0xa6 ... 0xa7: /* cmps */ |