Changeset 36220 in vbox for trunk/src/VBox/Runtime

Timestamp:

Mar 9, 2011 10:57:45 AM (14 years ago)

Author:

vboxsync

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

70434

Message:

GIP: Force a couple of aCPUs accesses within bounds.

Location:

trunk/src/VBox/Runtime/common/time

Files:

• timesupA.mac (modified) (1 diff)
• timesupref.h (modified) (1 diff)

trunk/src/VBox/Runtime/common/time/timesupA.mac

@@ -518 +518 @@
     ; pGipCpu = &pGip->aCPU[u8ApicId];
     shr     ebx, 24
-    mov     eax, SUPGIPCPU_size
-    mul     ebx
+    mov     eax, ebx
+ %if SUPGLOBALINFOPAGE_CPUS < 256
+    and     eax, SUPGLOBALINFOPAGE_CPUS - 1
+ %endif
+    imul    eax, SUPGIPCPU_size
     lea     pGipCPU, [pGip + rax + SUPGLOBALINFOPAGE.aCPUs]
 %else

trunk/src/VBox/Runtime/common/time/timesupref.h

@@ -64 +64 @@
 #ifdef ASYNC_GIP
         uint8_t u8ApicId = ASMGetApicId();
+# if SUPGLOBALINFOPAGE_CPUS < 256
+        PSUPGIPCPU pGipCpu = &pGip->aCPUs[u8ApicId & SUPGLOBALINFOPAGE_CPUS];
+# else
         PSUPGIPCPU pGipCpu = &pGip->aCPUs[u8ApicId];
+# endif
 #else
         PSUPGIPCPU pGipCpu = &pGip->aCPUs[0];