Changeset 33164 in vbox

Timestamp:

Oct 15, 2010 2:49:09 PM (14 years ago)

Author:

vboxsync

Message:

Can't deal with 8 byte operands in our 32-bit emulation code.

File:

• trunk/src/VBox/VMM/VMMAll/IOMAllMMIO.cpp (modified) (4 diffs)

trunk/src/VBox/VMM/VMMAll/IOMAllMMIO.cpp

@@ -752 +752 @@
     if (rc == VINF_SUCCESS)
     {
+#if HC_ARCH_BITS == 32
+        /* Can't deal with 8 byte operands in our 32-bit emulation code. */
+        if (cb > 4)
+            return VINF_IOM_HC_MMIO_READ_WRITE;
+#endif
         /* Emulate CMP and update guest flags. */
         uint32_t eflags = EMEmulateCmp(uData1, uData2, cb);
@@ -804 +809 @@
     if (iomGetRegImmData(pCpu, &pCpu->param1, pRegFrame, &uData1, &cb))
     {
+#if HC_ARCH_BITS == 32
+        /* Can't deal with 8 byte operands in our 32-bit emulation code. */
+        if (cb > 4)
+            return VINF_IOM_HC_MMIO_READ_WRITE;
+#endif
         /* and reg, [MMIO]. */
         Assert(pRange->CTX_SUFF(pfnReadCallback) || !pRange->pfnReadCallbackR3);
@@ -811 +821 @@
     else if (iomGetRegImmData(pCpu, &pCpu->param2, pRegFrame, &uData2, &cb))
     {
+#if HC_ARCH_BITS == 32
+        /* Can't deal with 8 byte operands in our 32-bit emulation code. */
+        if (cb > 4)
+            return VINF_IOM_HC_MMIO_READ_WRITE;
+#endif
         /* and [MMIO], reg|imm. */
         fAndWrite = true;
@@ -896 +911 @@
     if (rc == VINF_SUCCESS)
     {
+#if HC_ARCH_BITS == 32
+        /* Can't deal with 8 byte operands in our 32-bit emulation code. */
+        if (cb > 4)
+            return VINF_IOM_HC_MMIO_READ_WRITE;
+#endif
+
         /* Emulate TEST (=AND without write back) and update guest EFLAGS. */
         uint32_t eflags = EMEmulateAnd((uint32_t *)&uData1, uData2, cb);