儲存庫 vbox 的更動 16583

時間撮記:

2009-2-9 下午01:01:35 (16 年 以前)

作者:

vboxsync

訊息:

CFGM option YieldOnLSRRead for the virtual COM device, helps with Windows guest kernel debugger (xTracker #3612).

檔案:

• trunk/src/VBox/Devices/Serial/DevSerial.cpp (修改) (4 筆差異)

trunk/src/VBox/Devices/Serial/DevSerial.cpp

@@ -160 +160 @@
     bool                            fGCEnabled;
     bool                            fR0Enabled;
-    bool                            afAlignment[5];
+    bool                            fYieldOnLSRRead;
+    bool                            afAlignment[4];
 
     RTSEMEVENT                      ReceiveSem;
@@ -385 +386 @@
         break;
     case 5:
+        if ((s->lsr & UART_LSR_DR) == 0 && s->fYieldOnLSRRead)
+        {
+            /* No data available and yielding is enabled, so yield in ring3. */
+#ifndef IN_RING3
+            *pRC = VINF_IOM_HC_IOPORT_READ;
+            break;
+#else
+            RTThreadYield ();
+#endif
+        }
         ret = s->lsr;
         break;
@@ -776 +787 @@
      * Validate and read the configuration.
      */
-    if (!CFGMR3AreValuesValid(pCfgHandle, "IRQ\0" "IOBase\0" "GCEnabled\0" "R0Enabled\0"))
+    if (!CFGMR3AreValuesValid(pCfgHandle, "IRQ\0" "IOBase\0" "GCEnabled\0" "R0Enabled\0" "YieldOnLSRRead\0"))
     {
         AssertMsgFailed(("serialConstruct Invalid configuration values\n"));
@@ -791 +802 @@
         return PDMDEV_SET_ERROR(pDevIns, rc,
                                 N_("Configuration error: Failed to get the \"R0Enabled\" value"));
+
+    rc = CFGMR3QueryBoolDef(pCfgHandle, "YieldOnLSRRead", &pThis->fYieldOnLSRRead, false);
+    if (RT_FAILURE(rc))
+        return PDMDEV_SET_ERROR(pDevIns, rc,
+                                N_("Configuration error: Failed to get the \"YieldOnLSRRead\" value"));
 
     rc = CFGMR3QueryU8(pCfgHandle, "IRQ", &irq_lvl);