From dad83a8c1207e585b2cb417d0680fe2e9452d262 Mon Sep 17 00:00:00 2001 From: Star Zeng Date: Wed, 12 Nov 2014 03:18:09 +0000 Subject: [PATCH] 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 Reviewed-by: Jiewen Yao git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16334 6f19259b-4bc3-4df7-8a09-765794883524 --- MdePkg/Include/Base.h | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/MdePkg/Include/Base.h b/MdePkg/Include/Base.h index 4dda3c2f40..5934b0f998 100644 --- a/MdePkg/Include/Base.h +++ b/MdePkg/Include/Base.h @@ -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.
+Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.
Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.
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