Changeset 39989 in vbox for trunk/src/VBox/VMM/VMMAll

Timestamp:

Feb 3, 2012 4:31:04 PM (13 years ago)

Author:

vboxsync

Message:

txtX86-1: some prefix decoding checks for the groups and rex.

File:

• trunk/src/VBox/VMM/VMMAll/IEMAllInstructions.cpp.h (modified) (1 diff)

trunk/src/VBox/VMM/VMMAll/IEMAllInstructions.cpp.h

@@ -3266 +3266 @@
 
 /** Opcode 0x0f 0xae. */
-FNIEMOP_STUB(iemOp_Grp15); /** @todo next up: fxrstor */
+FNIEMOP_DEF(iemOp_Grp15)
+{
+    uint8_t bRm; IEM_OPCODE_GET_NEXT_U8(&bRm);
+    IEMOP_HLP_NO_LOCK_PREFIX(); /** @todo should probably not be raised until we've fetched all the opcode bytes? */
+    if ((bRm & X86_MODRM_MOD_MASK) != (3 << X86_MODRM_MOD_SHIFT))
+    {
+        ////
+    }
+    else
+    {
+
+        if (pIemCpu->offOpcode == 2 || )
+        {
+        }
+        pIemCpu->
+        switch (pIemCpu->fPrefixes & (IEM_OP_PRF_REPZ | IEM_OP_PRF_REPNZ | IEM_OP_PRF_SIZE_OP))
+        {
+            case IEM_OP_PRF_SIZE_OP:
+
+
+            case IEM_OP_PRF_REPZ:
+        }
+    }
+
+
+
+    if ((bRm & X86_MODRM_REG_MASK) != (0 << X86_MODRM_REG_SHIFT)) /* only mov Eb,Ib in this group. */
+        return IEMOP_RAISE_INVALID_LOCK_PREFIX();
+    IEMOP_MNEMONIC("mov Eb,Ib");
+
+    if ((bRm & X86_MODRM_MOD_MASK) == (3 << X86_MODRM_MOD_SHIFT))
+    {
+        /* register access */
+        uint8_t u8Imm; IEM_OPCODE_GET_NEXT_U8(&u8Imm);
+        IEM_MC_BEGIN(0, 0);
+        IEM_MC_STORE_GREG_U8((bRm & X86_MODRM_RM_MASK) | pIemCpu->uRexB, u8Imm);
+        IEM_MC_ADVANCE_RIP();
+        IEM_MC_END();
+    }
+    else
+    {
+        /* memory access. */
+        IEM_MC_BEGIN(0, 1);
+        IEM_MC_LOCAL(RTGCPTR, GCPtrEffDst);
+        IEM_MC_CALC_RM_EFF_ADDR(GCPtrEffDst, bRm);
+        uint8_t u8Imm; IEM_OPCODE_GET_NEXT_U8(&u8Imm);
+        IEM_MC_STORE_MEM_U8(pIemCpu->iEffSeg, GCPtrEffDst, u8Imm);
+        IEM_MC_ADVANCE_RIP();
+        IEM_MC_END();
+    }
+    return VINF_SUCCESS;
+}