Changeset 57276 in vbox for trunk/src/VBox/Runtime/r0drv/linux/semevent-r0drv-linux.c

Timestamp:

Aug 11, 2015 2:39:19 PM (9 years ago)

Author:

vboxsync

Message:

iprt/r0drv/linux: Preserve EFLAGS/AC where ever it may possibly be thought to change when calling kernel code.

File:

• trunk/src/VBox/Runtime/r0drv/linux/semevent-r0drv-linux.c (modified) (8 diffs)

trunk/src/VBox/Runtime/r0drv/linux/semevent-r0drv-linux.c

@@ -73 +73 @@
 {
     PRTSEMEVENTINTERNAL pThis;
+    IPRT_LINUX_SAVE_EFL_AC();
 
     AssertReturn(!(fFlags & ~(RTSEMEVENT_FLAGS_NO_LOCK_VAL | RTSEMEVENT_FLAGS_BOOTSTRAP_HACK)), VERR_INVALID_PARAMETER);
@@ -87 +88 @@
 
     *phEventSem = pThis;
+    IPRT_LINUX_RESTORE_EFL_AC();
     return VINF_SUCCESS;
 }
@@ -118 +120 @@
 RTDECL(int)  RTSemEventDestroy(RTSEMEVENT hEventSem)
 {
+    IPRT_LINUX_SAVE_EFL_AC();
+
     /*
      * Validate input.
@@ -135 +139 @@
     wake_up_all(&pThis->Head);
     rtR0SemEventLnxRelease(pThis);
+
+    IPRT_LINUX_RESTORE_EFL_AC();
     return VINF_SUCCESS;
 }
@@ -142 +148 @@
 RTDECL(int)  RTSemEventSignal(RTSEMEVENT hEventSem)
 {
+    IPRT_LINUX_SAVE_EFL_AC();
+
     /*
      * Validate input.
@@ -157 +165 @@
 
     rtR0SemEventLnxRelease(pThis);
+    IPRT_LINUX_RESTORE_EFL_AC();
     return VINF_SUCCESS;
 }
@@ -195 +204 @@
          * We have to wait.
          */
+        IPRT_LINUX_SAVE_EFL_AC();
         RTR0SEMLNXWAIT Wait;
         rc = rtR0SemLnxWaitInit(&Wait, fFlags, uTimeout, &pThis->Head);
@@ -231 +241 @@
             IPRT_DEBUG_SEMS_STATE_RC(pThis, 'E', rc);
         }
+        IPRT_LINUX_RESTORE_EFL_AC();
     }