Updated EFAPI definition for x64 GCC. Original thinking was to add optional EFIAPI support to standard GCC. New thinking is to support EFIAPI as a seperate processor target. This is to reduce validation risk to the main line GCC. Update the definition and comments to match current thinking.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1883 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 10 insertions, 5 deletions

diff --git a/MdePkg/Include/x64/ProcessorBind.h b/MdePkg/Include/x64/ProcessorBind.h
index 785d4d98f0..3a2fea26ce 100644
--- a/MdePkg/Include/x64/ProcessorBind.h
+++ b/MdePkg/Include/x64/ProcessorBind.h
@@ -177,13 +177,18 @@ typedef INT64   INTN;
 #elif __GNUC__

   ///

   /// Define the standard calling convention reguardless of optimization level.

-  /// efidecl is an extension to GCC that supports the differnece between x64

-  /// GCC ABI and x64 Microsoft* ABI. EFI is closer to the Microsoft* ABI and

-  /// EFIAPI makes sure the right ABI is used for public interfaces. 

-  /// eficecl is a work in progress and we do not yet have the compiler

+  /// The GCC support assumes a GCC compiler that supports the EFI ABI. The EFI

+  /// ABI is much closer to the x64 Microsoft* ABI than standard x64 (x86-64) 

+  /// GCC ABI. Thus a standard x64 (x86-64) GCC compiler can not be used for 

+  /// x64. Warning the assembly code in the MDE x64 does not follow the correct 

+  /// ABI for the standard x64 (x86-64) GCC.

   ///

-  #define EFIAPI __attribute__((efidecl))    

+  #define EFIAPI 

 #else

+  ///

+  /// The default for a non Microsoft* or GCC compiler is to assume the EFI ABI

+  /// is the standard. 

+  ///

   #define EFIAPI       

 #endif