Changeset 10687 in vbox for trunk/src/VBox/VMM/CPUMInternal.h

Timestamp:

Jul 16, 2008 9:22:28 AM (17 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

33404

Message:

Save the FPU control word and MXCSR on entry and restore them afterwards. (VT-x & AMD-V)
Security measure so the guest can't cause fpu/sse exceptions as we no longer restore the entire
host fpu state.

File:

• trunk/src/VBox/VMM/CPUMInternal.h (modified) (2 diffs)

trunk/src/VBox/VMM/CPUMInternal.h

@@ -322 +322 @@
         X86CPUIDFEATECX     ecx;
     }   CPUFeatures;
+    /** Host extended CPU features. */
+    struct
+    {
+        /** edx part */
+        uint32_t     edx;
+        /** ecx part */
+        uint32_t     ecx;
+    }   CPUFeaturesExt;
 
     /* CPU manufacturer. */
@@ -360 +368 @@
 __BEGIN_DECLS
 
-DECLASM(int)  CPUMHandleLazyFPUAsm(PCPUM pCPUM);
-DECLASM(int)  CPUMRestoreHostFPUStateAsm(PCPUM pCPUM);
-DECLASM(void) CPUMLoadFPUAsm(PCPUMCTX pCtx);
-DECLASM(void) CPUMSaveFPUAsm(PCPUMCTX pCtx);
-DECLASM(void) CPUMLoadXMMAsm(PCPUMCTX pCtx);
-DECLASM(void) CPUMSaveXMMAsm(PCPUMCTX pCtx);
-
+DECLASM(int)      CPUMHandleLazyFPUAsm(PCPUM pCPUM);
+DECLASM(int)      CPUMRestoreHostFPUStateAsm(PCPUM pCPUM);
+DECLASM(void)     CPUMLoadFPUAsm(PCPUMCTX pCtx);
+DECLASM(void)     CPUMSaveFPUAsm(PCPUMCTX pCtx);
+DECLASM(void)     CPUMLoadXMMAsm(PCPUMCTX pCtx);
+DECLASM(void)     CPUMSaveXMMAsm(PCPUMCTX pCtx);
+DECLASM(void)     CPUMSetFCW(uint16_t u16FCW);
+DECLASM(uint16_t) CPUMGetFCW();
+DECLASM(void)     CPUMSetMXCSR(uint32_t u32MXCSR);
+DECLASM(uint32_t) CPUMGetMXCSR();
 
 __END_DECLS