Update upstream source from tag 'upstream/15.3'debian/15.3-1

Update to upstream version '15.3'
with Debian dir 1b484f1c1ac270604a5a1451b34de4b0865c6211

1 files changed, 105 insertions, 0 deletions

diff --git a/gnu-efi/lib/runtime/vm.c b/gnu-efi/lib/runtime/vm.c
new file mode 100644
index 00000000..26e0c8e1
--- /dev/null
+++ b/gnu-efi/lib/runtime/vm.c
@@ -0,0 +1,105 @@
+/*++
+
+Copyright (c) 1998  Intel Corporation
+
+Module Name:
+
+    vm.c
+
+Abstract:
+
+    EFI Hell to remap runtime address into the new virual address space 
+    that was registered by the OS for RT calls.
+
+    So the code image needs to be relocated. All pointers need to be 
+    manually fixed up since the address map changes. 
+
+    GOOD LUCK NOT HAVING BUGS IN YOUR CODE! PLEASE TEST A LOT. MAKE SURE
+    EXIT BOOTSERVICES OVER WRITES ALL BOOTSERVICE MEMORY & DATA SPACES WHEN 
+    YOU TEST.
+
+Revision History
+
+--*/
+
+#include "lib.h"
+
+#ifndef __GNUC__
+#pragma RUNTIME_CODE(RtLibEnableVirtualMappings)
+#endif
+VOID
+RUNTIMEFUNCTION
+RtLibEnableVirtualMappings (
+    VOID
+    )
+{
+    EFI_CONVERT_POINTER     ConvertPointer;
+
+    //
+    // If this copy of the lib is linked into the firmware, then
+    // do not update the pointers yet.
+    //
+
+    if (!LibFwInstance) {
+
+        //
+        // Different components are updating to the new virtual
+        // mappings at differnt times.  The only function that
+        // is safe to call at this notification is ConvertAddress
+        //
+
+        ConvertPointer = RT->ConvertPointer;
+
+        //
+        // Fix any pointers that the lib created, that may be needed
+        // during runtime.
+        //
+
+        ConvertPointer (EFI_INTERNAL_PTR, (VOID **)&RT);
+        ConvertPointer (EFI_OPTIONAL_PTR, (VOID **)&LibRuntimeDebugOut);
+
+        ConvertPointer (EFI_INTERNAL_PTR, (VOID **)&LibRuntimeRaiseTPL);
+        ConvertPointer (EFI_INTERNAL_PTR, (VOID **)&LibRuntimeRestoreTPL);
+
+        // that was it :^)
+    }
+}
+
+
+#ifndef __GNUC__
+#pragma RUNTIME_CODE(RtConvertList)
+#endif
+VOID
+RUNTIMEFUNCTION
+RtConvertList (
+    IN UINTN                DebugDisposition,
+    IN OUT LIST_ENTRY       *ListHead
+    )
+{
+    LIST_ENTRY              *Link;
+    LIST_ENTRY              *NextLink;
+    EFI_CONVERT_POINTER     ConvertPointer;
+
+    ConvertPointer = RT->ConvertPointer;
+
+    //
+    // Convert all the Flink & Blink pointers in the list
+    //
+
+    Link = ListHead;
+    do {
+        NextLink = Link->Flink;
+
+        ConvertPointer (
+            Link->Flink == ListHead ? DebugDisposition : 0, 
+            (VOID **)&Link->Flink
+            );
+
+        ConvertPointer (
+            Link->Blink == ListHead ? DebugDisposition : 0, 
+            (VOID **)&Link->Blink
+            );
+
+        Link = NextLink;
+    } while (Link != ListHead);
+}