1 files changed, 107 insertions, 0 deletions
diff --git a/src/VBox/VMM/VMMR0/TRPMR0.cpp b/src/VBox/VMM/VMMR0/TRPMR0.cpp
new file mode 100644
index 00000000..f9ca7939
--- /dev/null
+++ b/src/VBox/VMM/VMMR0/TRPMR0.cpp
@@ -0,0 +1,107 @@
+/* $Id: TRPMR0.cpp $ */
+/** @file
+ * TRPM - The Trap Monitor - HC Ring 0
+ */
+
+/*
+ * Copyright (C) 2006-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP LOG_GROUP_TRPM
+#include <VBox/vmm/trpm.h>
+#include "TRPMInternal.h"
+#include <VBox/vmm/vm.h>
+#include <VBox/vmm/vmm.h>
+#include <iprt/errcore.h>
+#include <VBox/log.h>
+#include <iprt/assert.h>
+#include <iprt/asm-amd64-x86.h>
+
+
+#if defined(RT_OS_DARWIN) && ARCH_BITS == 32
+# error "32-bit darwin is no longer supported. Go back to 4.3 or earlier!"
+#endif
+
+
+/**
+ * Dispatches an interrupt that arrived while we were in the guest context.
+ *
+ * @param   pVM     The cross context VM structure.
+ * @remark  Must be called with interrupts disabled.
+ */
+VMMR0DECL(void) TRPMR0DispatchHostInterrupt(PVM pVM)
+{
+    /*
+     * Get the active interrupt vector number.
+     */
+    PVMCPU pVCpu = VMMGetCpu0(pVM);
+    RTUINT uActiveVector = pVCpu->trpm.s.uActiveVector;
+    pVCpu->trpm.s.uActiveVector = UINT32_MAX;
+    AssertMsgReturnVoid(uActiveVector < 256, ("uActiveVector=%#x is invalid! (More assertions to come, please enjoy!)\n", uActiveVector));
+
+#if HC_ARCH_BITS == 64 && defined(RT_OS_DARWIN)
+    /*
+     * Do it the simple and safe way.
+     *
+     * This is a workaround for an optimization bug in the code below
+     * or a gcc 4.2 on mac (snow leopard seed 314).
+     */
+    trpmR0DispatchHostInterruptSimple(uActiveVector);
+
+#else  /* The complicated way: */
+
+    /*
+     * Get the handler pointer (16:32 ptr) / (16:48 ptr).
+     */
+    RTIDTR      Idtr;
+    ASMGetIDTR(&Idtr);
+# if HC_ARCH_BITS == 32
+    PVBOXIDTE   pIdte = &((PVBOXIDTE)Idtr.pIdt)[uActiveVector];
+# else
+    PVBOXIDTE64 pIdte = &((PVBOXIDTE64)Idtr.pIdt)[uActiveVector];
+# endif
+    AssertMsgReturnVoid(pIdte->Gen.u1Present, ("The IDT entry (%d) is not present!\n", uActiveVector));
+    AssertMsgReturnVoid(    pIdte->Gen.u3Type1 == VBOX_IDTE_TYPE1
+                        ||  pIdte->Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32,
+                        ("The IDT entry (%d) is not 32-bit int gate! type1=%#x type2=%#x\n",
+                         uActiveVector, pIdte->Gen.u3Type1, pIdte->Gen.u5Type2));
+# if HC_ARCH_BITS == 32
+    RTFAR32   pfnHandler;
+    pfnHandler.off = VBOXIDTE_OFFSET(*pIdte);
+    pfnHandler.sel = pIdte->Gen.u16SegSel;
+
+    const RTR0UINTREG uRSP = ~(RTR0UINTREG)0;
+
+# else /* 64-bit: */
+    RTFAR64   pfnHandler;
+    pfnHandler.off = VBOXIDTE64_OFFSET(*pIdte);
+    pfnHandler.sel = pIdte->Gen.u16SegSel;
+
+    const RTR0UINTREG uRSP = ~(RTR0UINTREG)0;
+    if (pIdte->Gen.u3Ist)
+    {
+        trpmR0DispatchHostInterruptSimple(uActiveVector);
+        return;
+    }
+
+# endif
+
+    /*
+     * Dispatch it.
+     */
+    trpmR0DispatchHostInterrupt(pfnHandler.off, pfnHandler.sel, uRSP);
+#endif
+}
+