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MdePkg: Add RETURN_ADDRESS macro into Base.h. 

Based on compiler intrinsic function.
MSVC: _ReturnAddress
GCC: __builtin_return_address

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16334 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Star Zeng 2014-11-12 03:18:09 +00:00 committed by lzeng14
parent 1531a469eb
commit dad83a8c12
1 changed files with 22 additions and 1 deletions
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23
MdePkg/Include/Base.h
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@ -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 @@ typedef UINTN RETURN_STATUS;
#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