Revision: 16704
http://sourceforge.net/p/edk2/code/16704
Author: vanjeff
Date: 2015-02-03 07:27:25 +0000 (Tue, 03 Feb 2015)
Log Message:
-----------
MdePkg: Add RETURN_ADDRESS macro into Base.h.
(Sync patch r16334 from main trunk.)
Based on compiler intrinsic function.
MSVC: _ReturnAddress
GCC: __builtin_return_address
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <[email protected]>
Reviewed-by: Jiewen Yao <[email protected]>
Revision Links:
--------------
http://sourceforge.net/p/edk2/code/16334
Modified Paths:
--------------
branches/UDK2014.SP1/MdePkg/Include/Base.h
Modified: branches/UDK2014.SP1/MdePkg/Include/Base.h
===================================================================
--- branches/UDK2014.SP1/MdePkg/Include/Base.h 2015-02-03 07:12:39 UTC (rev
16703)
+++ branches/UDK2014.SP1/MdePkg/Include/Base.h 2015-02-03 07:27:25 UTC (rev
16704)
@@ -6,7 +6,7 @@
environment. There are a set of base libraries in the Mde Package that can
be used to implement base modules.
-Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD
License
@@ -1016,5 +1016,26 @@
#define SIGNATURE_64(A, B, C, D, E, F, G, H) \
(SIGNATURE_32 (A, B, C, D) | ((UINT64) (SIGNATURE_32 (E, F, G, H)) << 32))
+#if defined(_MSC_EXTENSIONS)
+ //
+ // Intrinsic function provides the address of the instruction in the calling
+ // function that will be executed after control returns to the caller.
+ //
+ #pragma intrinsic(_ReturnAddress)
+ #define RETURN_ADDRESS(L) ((L == 0) ? _ReturnAddress() : (VOID *) 0)
+#elif defined(__GNUC__)
+ //
+ // Built-in Function returns the return address of the current function,
+ // or of one of its callers.
+ //
+ void * __builtin_return_address (unsigned int level);
+ #define RETURN_ADDRESS(L) __builtin_return_address (L)
+#else
+ //
+ // Compilers don't support this feature.
+ //
+ #define RETURN_ADDRESS(L) ((VOID *) 0)
#endif
+#endif
+
------------------------------------------------------------------------------
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