Changeset 36669 in vbox for trunk/src/VBox/VMM/include

Timestamp:

Apr 14, 2011 12:21:43 PM (14 years ago)

Author:

vboxsync

Message:

PATM: Record trampoline patches in the target to update the displacement on a patch refresh. (see xTracker #5593 for further information)

File:

• trunk/src/VBox/VMM/include/PATMInternal.h (modified) (4 diffs)

trunk/src/VBox/VMM/include/PATMInternal.h

@@ -241 +241 @@
 } PATCHINFOTEMP, *PPATCHINFOTEMP;
 
+/** Forward declaration for a pointer to a trampoline patch record. */
+typedef struct TRAMPREC *PTRAMPREC;
+
 typedef struct _PATCHINFO
 {
@@ -298 +301 @@
     R3PTRTYPE(PPATCHINFOTEMP) pTempInfo;
 
+    /* List of trampoline patches referencing this patch.
+     * Used when refreshing the patch. (Only for function duplicates) */
+    R3PTRTYPE(PTRAMPREC)      pTrampolinePatchesHead;
+
     /* Count the number of writes to the corresponding guest code. */
     uint32_t        cCodeWrites;
@@ -312 +319 @@
     /* First opcode byte, that's overwritten when a patch is marked dirty. */
     uint8_t         bDirtyOpcode;
-    uint8_t         Alignment2[7];      /**< Align the structure size on a 8-byte boundary. */
+    uint8_t         Alignment2[HC_ARCH_BITS == 64 ? 7 : 3];      /**< Align the structure size on a 8-byte boundary. */
 } PATCHINFO, *PPATCHINFO;
 
@@ -330 +337 @@
     PATCHINFO  patch;
 } PATMPATCHREC, *PPATMPATCHREC;
+
+/**
+ * Record for a trampoline patch.
+ */
+typedef struct TRAMPREC
+{
+    /** Pointer to the next trampoline patch. */
+    struct TRAMPREC    *pNext;
+    /** Pointer to the trampoline patch record. */
+    PPATMPATCHREC       pPatchTrampoline;
+} TRAMPREC;
 
 /** Increment for allocating room for pointer array */