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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 environment. There are a set of base libraries in the Mde Package that can
be used to implement base modules. 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> Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
This program and the accompanying materials This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License 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) \ #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)) (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 #endif