MdePkg: Use builtin offsetof function for GCC 4.0 and newer

GCC 4.0 and newer have a builtin function for implementing
'offsetof' therefore we make use of it for our OFFSET_OF
macro.

References:
http://gcc.gnu.org/onlinedocs/gcc-4.0.0/gcc/Offsetof.html
http://gcc.gnu.org/onlinedocs/gcc-4.5.1/gcc/Offsetof.html

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10931 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 117 insertions, 109 deletions

diff --git a/MdePkg/Include/Base.h b/MdePkg/Include/Base.h
index 6f411b08b..e93f68115 100644
--- a/MdePkg/Include/Base.h
+++ b/MdePkg/Include/Base.h
@@ -1,8 +1,8 @@
 /** @file

   Root include file for Mde Package Base type modules

 

-  This is the include file for any module of type base. Base modules only use 

-  types defined via this include file and can be ported easily to any 

+  This is the include file for any module of type base. Base modules only use

+  types defined via this include file and can be ported easily to any

   environment. There are a set of base libraries in the Mde Package that can

   be used to implement base modules.

 

@@ -30,7 +30,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 

 /**

   Verifies the storage size of a given data type.

-  

+

   This macro generates a divide by zero error or a zero size array declaration in

   the preprocessor if the size is incorrect.  These are declared as "extern" so

   the space for these arrays will not be in the modules.

@@ -42,8 +42,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #define VERIFY_SIZE_OF(TYPE, Size) extern UINT8 _VerifySizeof##TYPE[(sizeof(TYPE) == (Size)) / (sizeof(TYPE) == (Size))]

 

 //

-// Verify that ProcessorBind.h produced UEFI Data Types that are compliant with 

-// Section 2.3.1 of the UEFI 2.3 Specification.  

+// Verify that ProcessorBind.h produced UEFI Data Types that are compliant with

+// Section 2.3.1 of the UEFI 2.3 Specification.

 //

 VERIFY_SIZE_OF (BOOLEAN, 1);

 VERIFY_SIZE_OF (INT8, 1);

@@ -59,19 +59,19 @@ VERIFY_SIZE_OF (CHAR16, 2);
 

 //

 // The Microsoft* C compiler can removed references to unreferenced data items

-//  if the /OPT:REF linker option is used. We defined a macro as this is a 

+//  if the /OPT:REF linker option is used. We defined a macro as this is a

 //  a non standard extension

 //

 #if defined(_MSC_EXTENSIONS) && !defined (MDE_CPU_EBC)

   ///

-  /// Remove global variable from the linked image if there are no references to 

+  /// Remove global variable from the linked image if there are no references to

   /// it after all compiler and linker optimizations have been performed.

   ///

   ///

   #define GLOBAL_REMOVE_IF_UNREFERENCED __declspec(selectany)

 #else

   ///

-  /// Remove the global variable from the linked image if there are no references 

+  /// Remove the global variable from the linked image if there are no references

   ///  to it after all compiler and linker optimizations have been performed.

   ///

   ///

@@ -97,7 +97,7 @@ VERIFY_SIZE_OF (CHAR16, 2);
 

 #if __APPLE__

   //

-  // Apple extension that is used by the linker to optimize code size 

+  // Apple extension that is used by the linker to optimize code size

   // with assembly functions. Put at the end of your .S files

   //

   #define ASM_FUNCTION_REMOVE_IF_UNREFERENCED  .subsections_via_symbols

@@ -107,7 +107,7 @@ VERIFY_SIZE_OF (CHAR16, 2);
 

 #ifdef __CC_ARM

   //

-  // Older RVCT ARM compilers don't fully support #pragma pack and require __packed 

+  // Older RVCT ARM compilers don't fully support #pragma pack and require __packed

   // as a prefix for the structure.

   //

   #define PACKED  __packed

@@ -116,7 +116,7 @@ VERIFY_SIZE_OF (CHAR16, 2);
 #endif

 

 ///

-/// 128 bit buffer containing a unique identifier value.  

+/// 128 bit buffer containing a unique identifier value.

 /// Unless otherwise specified, aligned on a 64 bit boundary.

 ///

 typedef struct {

@@ -185,7 +185,7 @@ struct _LIST_ENTRY {
 #define OPTIONAL

 

 //

-//  UEFI specification claims 1 and 0. We are concerned about the 

+//  UEFI specification claims 1 and 0. We are concerned about the

 //  complier portability so we did it this way.

 //

 

@@ -326,7 +326,7 @@ struct _LIST_ENTRY {
 #define  SIZE_2EB    0x2000000000000000ULL

 #define  SIZE_4EB    0x4000000000000000ULL

 #define  SIZE_8EB    0x8000000000000000ULL

- 

+

 #define  BASE_1KB    0x00000400

 #define  BASE_2KB    0x00000800

 #define  BASE_4KB    0x00001000

@@ -384,7 +384,7 @@ struct _LIST_ENTRY {
 

 //

 //  Support for variable length argument lists using the ANSI standard.

-//  

+//

 //  Since we are using the ANSI standard we used the standard naming and

 //  did not follow the coding convention

 //

@@ -437,8 +437,8 @@ struct _LIST_ENTRY {
 //

 

 ///

-/// Variable used to traverse the list of arguments. This type can vary by 

-/// implementation and could be an array or structure. 

+/// Variable used to traverse the list of arguments. This type can vary by

+/// implementation and could be an array or structure.

 ///

 #ifdef __APCS_ADSABI

   typedef int         *va_list[1];

@@ -460,8 +460,8 @@ struct _LIST_ENTRY {
 //

 

 ///

-/// Variable used to traverse the list of arguments. This type can vary by 

-/// implementation and could be an array or structure. 

+/// Variable used to traverse the list of arguments. This type can vary by

+/// implementation and could be an array or structure.

 ///

 typedef __builtin_va_list VA_LIST;

 

@@ -473,42 +473,42 @@ typedef __builtin_va_list VA_LIST;
 

 #else

 ///

-/// Variable used to traverse the list of arguments. This type can vary by 

-/// implementation and could be an array or structure. 

+/// Variable used to traverse the list of arguments. This type can vary by

+/// implementation and could be an array or structure.

 ///

 typedef CHAR8 *VA_LIST;

 

 /**

-  Retrieves a pointer to the beginning of a variable argument list, based on 

-  the name of the parameter that immediately precedes the variable argument list. 

+  Retrieves a pointer to the beginning of a variable argument list, based on

+  the name of the parameter that immediately precedes the variable argument list.

 

-  This function initializes Marker to point to the beginning of the variable  

-  argument list that immediately follows Parameter.  The method for computing the 

-  pointer to the next argument in the argument list is CPU-specific following the 

+  This function initializes Marker to point to the beginning of the variable

+  argument list that immediately follows Parameter.  The method for computing the

+  pointer to the next argument in the argument list is CPU-specific following the

   EFIAPI ABI.

 

   @param   Marker       The VA_LIST used to traverse the list of arguments.

-  @param   Parameter    The name of the parameter that immediately precedes 

+  @param   Parameter    The name of the parameter that immediately precedes

                         the variable argument list.

-  

+

   @return  A pointer to the beginning of a variable argument list.

 

 **/

 #define VA_START(Marker, Parameter) (Marker = (VA_LIST) ((UINTN) & (Parameter) + _INT_SIZE_OF (Parameter)))

 

 /**

-  Returns an argument of a specified type from a variable argument list and updates 

-  the pointer to the variable argument list to point to the next argument. 

+  Returns an argument of a specified type from a variable argument list and updates

+  the pointer to the variable argument list to point to the next argument.

 

-  This function returns an argument of the type specified by TYPE from the beginning 

-  of the variable argument list specified by Marker.  Marker is then updated to point 

-  to the next argument in the variable argument list.  The method for computing the 

+  This function returns an argument of the type specified by TYPE from the beginning

+  of the variable argument list specified by Marker.  Marker is then updated to point

+  to the next argument in the variable argument list.  The method for computing the

   pointer to the next argument in the argument list is CPU-specific following the EFIAPI ABI.

 

   @param   Marker   VA_LIST used to traverse the list of arguments.

-  @param   TYPE     The type of argument to retrieve from the beginning 

+  @param   TYPE     The type of argument to retrieve from the beginning

                     of the variable argument list.

-  

+

   @return  An argument of the type specified by TYPE.

 

 **/

@@ -517,12 +517,12 @@ typedef CHAR8 *VA_LIST;
 /**

   Terminates the use of a variable argument list.

 

-  This function initializes Marker so it can no longer be used with VA_ARG().  

-  After this macro is used, the only way to access the variable argument list is 

+  This function initializes Marker so it can no longer be used with VA_ARG().

+  After this macro is used, the only way to access the variable argument list is

   by using VA_START() again.

 

   @param   Marker   VA_LIST used to traverse the list of arguments.

-  

+

 **/

 #define VA_END(Marker)      (Marker = (VA_LIST) 0)

 

@@ -543,130 +543,138 @@ typedef UINTN  *BASE_LIST;
 #define _BASE_INT_SIZE_OF(TYPE) ((sizeof (TYPE) + sizeof (UINTN) - 1) / sizeof (UINTN))

 

 /**

-  Returns an argument of a specified type from a variable argument list and updates 

-  the pointer to the variable argument list to point to the next argument. 

+  Returns an argument of a specified type from a variable argument list and updates

+  the pointer to the variable argument list to point to the next argument.

 

-  This function returns an argument of the type specified by TYPE from the beginning 

-  of the variable argument list specified by Marker.  Marker is then updated to point 

-  to the next argument in the variable argument list.  The method for computing the 

+  This function returns an argument of the type specified by TYPE from the beginning

+  of the variable argument list specified by Marker.  Marker is then updated to point

+  to the next argument in the variable argument list.  The method for computing the

   pointer to the next argument in the argument list is CPU specific following the EFIAPI ABI.

 

   @param   Marker   The pointer to the beginning of a variable argument list.

-  @param   TYPE     The type of argument to retrieve from the beginning 

+  @param   TYPE     The type of argument to retrieve from the beginning

                     of the variable argument list.

-  

+

   @return  An argument of the type specified by TYPE.

 

 **/

 #define BASE_ARG(Marker, TYPE)   (*(TYPE *) ((Marker += _BASE_INT_SIZE_OF (TYPE)) - _BASE_INT_SIZE_OF (TYPE)))

 

 /**

-  The macro that returns the byte offset of a field in a data structure. 

+  The macro that returns the byte offset of a field in a data structure.

 

-  This function returns the offset, in bytes, of field specified by Field from the 

-  beginning of the  data structure specified by TYPE. If TYPE does not contain Field, 

-  the module will not compile.  

+  This function returns the offset, in bytes, of field specified by Field from the

+  beginning of the  data structure specified by TYPE. If TYPE does not contain Field,

+  the module will not compile.

 

-  @param   TYPE     The name of the data structure that contains the field specified by Field. 

+  @param   TYPE     The name of the data structure that contains the field specified by Field.

   @param   Field    The name of the field in the data structure.

-  

+

   @return  Offset, in bytes, of field.

-  

+

 **/

+#ifdef __GNUC__

+#if __GNUC__ >= 4

+#define OFFSET_OF(TYPE, Field) ((UINTN) __builtin_offsetof(TYPE, Field))

+#endif

+#endif

+

+#ifndef OFFSET_OF

 #define OFFSET_OF(TYPE, Field) ((UINTN) &(((TYPE *)0)->Field))

+#endif

 

 /**

-  Macro that returns a pointer to the data structure that contains a specified field of 

-  that data structure.  This is a lightweight method to hide information by placing a 

-  public data structure inside a larger private data structure and using a pointer to 

+  Macro that returns a pointer to the data structure that contains a specified field of

+  that data structure.  This is a lightweight method to hide information by placing a

+  public data structure inside a larger private data structure and using a pointer to

   the public data structure to retrieve a pointer to the private data structure.

 

-  This function computes the offset, in bytes, of field specified by Field from the beginning 

-  of the  data structure specified by TYPE.  This offset is subtracted from Record, and is 

-  used to return a pointer to a data structure of the type specified by TYPE. If the data type 

-  specified by TYPE does not contain the field specified by Field, then the module will not compile. 

-   

-  @param   Record   Pointer to the field specified by Field within a data structure of type TYPE. 

-  @param   TYPE     The name of the data structure type to return.  This data structure must 

-                    contain the field specified by Field. 

+  This function computes the offset, in bytes, of field specified by Field from the beginning

+  of the  data structure specified by TYPE.  This offset is subtracted from Record, and is

+  used to return a pointer to a data structure of the type specified by TYPE. If the data type

+  specified by TYPE does not contain the field specified by Field, then the module will not compile.

+

+  @param   Record   Pointer to the field specified by Field within a data structure of type TYPE.

+  @param   TYPE     The name of the data structure type to return.  This data structure must

+                    contain the field specified by Field.

   @param   Field    The name of the field in the data structure specified by TYPE to which Record points.

-  

+

   @return  A pointer to the structure from one of it's elements.

-  

+

 **/

 #define BASE_CR(Record, TYPE, Field)  ((TYPE *) ((CHAR8 *) (Record) - (CHAR8 *) &(((TYPE *) 0)->Field)))

 

 /**

-  Rounds a value up to the next boundary using a specified alignment.  

+  Rounds a value up to the next boundary using a specified alignment.

 

-  This function rounds Value up to the next boundary using the specified Alignment.  

-  This aligned value is returned.  

+  This function rounds Value up to the next boundary using the specified Alignment.

+  This aligned value is returned.

 

   @param   Value      The value to round up.

   @param   Alignment  The alignment boundary used to return the aligned value.

-  

+

   @return  A value up to the next boundary.

-  

+

 **/

 #define ALIGN_VALUE(Value, Alignment) ((Value) + (((Alignment) - (Value)) & ((Alignment) - 1)))

 

 /**

-  Adjust a pointer by adding the minimum offset required for it to be aligned on 

-  a specified alignment boundary.  

+  Adjust a pointer by adding the minimum offset required for it to be aligned on

+  a specified alignment boundary.

 

-  This function rounds the pointer specified by Pointer to the next alignment boundary 

-  specified by Alignment. The pointer to the aligned address is returned.  

+  This function rounds the pointer specified by Pointer to the next alignment boundary

+  specified by Alignment. The pointer to the aligned address is returned.

 

   @param   Pointer    The pointer to round up.

   @param   Alignment  The alignment boundary to use to return an aligned pointer.

-  

+

   @return  Pointer to the aligned address.

-  

+

 **/

 #define ALIGN_POINTER(Pointer, Alignment) ((VOID *) (ALIGN_VALUE ((UINTN)(Pointer), (Alignment))))

 

 /**

-  Rounds a value up to the next natural boundary for the current CPU.  

-  This is 4-bytes for 32-bit CPUs and 8-bytes for 64-bit CPUs.   

+  Rounds a value up to the next natural boundary for the current CPU.

+  This is 4-bytes for 32-bit CPUs and 8-bytes for 64-bit CPUs.

 

-  This function rounds the value specified by Value up to the next natural boundary for the 

-  current CPU. This rounded value is returned.  

+  This function rounds the value specified by Value up to the next natural boundary for the

+  current CPU. This rounded value is returned.

 

   @param   Value      The value to round up.

 

   @return  Rounded value specified by Value.

-  

+

 **/

 #define ALIGN_VARIABLE(Value)  ALIGN_VALUE ((Value), sizeof (UINTN))

-  

+

 

 /**

-  Return the maximum of two operands. 

+  Return the maximum of two operands.

 

-  This macro returns the maximum of two operand specified by a and b.  

+  This macro returns the maximum of two operand specified by a and b.

   Both a and b must be the same numerical types, signed or unsigned.

 

   @param   a        The first operand with any numerical type.

-  @param   b        The second operand. Can be any numerical type as long as is 

+  @param   b        The second operand. Can be any numerical type as long as is

                     the same type as a.

-  

+

   @return  Maximum of two operands.

-  

+

 **/

 #define MAX(a, b)                       \

   (((a) > (b)) ? (a) : (b))

 

 /**

-  Return the minimum of two operands. 

+  Return the minimum of two operands.

 

-  This macro returns the minimal of two operand specified by a and b.  

+  This macro returns the minimal of two operand specified by a and b.

   Both a and b must be the same numerical types, signed or unsigned.

 

   @param   a        The first operand with any numerical type.

   @param   b        The second operand. It should be the same any numerical type with a.

-  

+

   @return  Minimum of two operands.

-  

+

 **/

 

 #define MIN(a, b)                       \

@@ -678,9 +686,9 @@ typedef UINTN  *BASE_LIST;
 typedef UINTN RETURN_STATUS;

 

 /**

-  Produces a RETURN_STATUS code with the highest bit set. 

+  Produces a RETURN_STATUS code with the highest bit set.

 

-  @param  StatusCode    The status code value to convert into a warning code.  

+  @param  StatusCode    The status code value to convert into a warning code.

                         StatusCode must be in the range 0x00000000..0x7FFFFFFF.

 

   @return The value specified by StatusCode with the highest bit set.

@@ -689,9 +697,9 @@ typedef UINTN RETURN_STATUS;
 #define ENCODE_ERROR(StatusCode)     ((RETURN_STATUS)(MAX_BIT | (StatusCode)))

 

 /**

-  Produces a RETURN_STATUS code with the highest bit clear. 

+  Produces a RETURN_STATUS code with the highest bit clear.

 

-  @param  StatusCode    The status code value to convert into a warning code.  

+  @param  StatusCode    The status code value to convert into a warning code.

                         StatusCode must be in the range 0x00000000..0x7FFFFFFF.

 

   @return The value specified by StatusCode with the highest bit clear.

@@ -700,10 +708,10 @@ typedef UINTN RETURN_STATUS;
 #define ENCODE_WARNING(StatusCode)   ((RETURN_STATUS)(StatusCode))

 

 /**

-  Returns TRUE if a specified RETURN_STATUS code is an error code. 

+  Returns TRUE if a specified RETURN_STATUS code is an error code.

+

+  This function returns TRUE if StatusCode has the high bit set.  Otherwise, FALSE is returned.

 

-  This function returns TRUE if StatusCode has the high bit set.  Otherwise, FALSE is returned.  

-  

   @param  StatusCode    The status code value to evaluate.

 

   @retval TRUE          The high bit of StatusCode is set.

@@ -766,7 +774,7 @@ typedef UINTN RETURN_STATUS;
 #define RETURN_OUT_OF_RESOURCES      ENCODE_ERROR (9)

 

 ///

-/// An inconsistency was detected on the file system causing the 

+/// An inconsistency was detected on the file system causing the

 /// operation to fail.

 ///

 #define RETURN_VOLUME_CORRUPTED      ENCODE_ERROR (10)

@@ -777,7 +785,7 @@ typedef UINTN RETURN_STATUS;
 #define RETURN_VOLUME_FULL           ENCODE_ERROR (11)

 

 ///

-/// The device does not contain any medium to perform the 

+/// The device does not contain any medium to perform the

 /// operation.

 ///

 #define RETURN_NO_MEDIA              ENCODE_ERROR (12)

@@ -893,17 +901,17 @@ typedef UINTN RETURN_STATUS;
 #define RETURN_WARN_WRITE_FAILURE    ENCODE_WARNING (3)

 

 ///

-/// The resulting buffer was too small, and the data was 

+/// The resulting buffer was too small, and the data was

 /// truncated to the buffer size.

 ///

 #define RETURN_WARN_BUFFER_TOO_SMALL ENCODE_WARNING (4)

 

 /**

   Returns a 16-bit signature built from 2 ASCII characters.

-  

-  This macro returns a 16-bit value built from the two ASCII characters specified 

+

+  This macro returns a 16-bit value built from the two ASCII characters specified

   by A and B.

-  

+

   @param  A    The first ASCII character.

   @param  B    The second ASCII character.

 

@@ -914,10 +922,10 @@ typedef UINTN RETURN_STATUS;
 

 /**

   Returns a 32-bit signature built from 4 ASCII characters.

-  

-  This macro returns a 32-bit value built from the four ASCII characters specified 

+

+  This macro returns a 32-bit value built from the four ASCII characters specified

   by A, B, C, and D.

-  

+

   @param  A    The first ASCII character.

   @param  B    The second ASCII character.

   @param  C    The third ASCII character.

@@ -931,10 +939,10 @@ typedef UINTN RETURN_STATUS;
 

 /**

   Returns a 64-bit signature built from 8 ASCII characters.

-  

-  This macro returns a 64-bit value built from the eight ASCII characters specified 

+

+  This macro returns a 64-bit value built from the eight ASCII characters specified

   by A, B, C, D, E, F, G,and H.

-  

+

   @param  A    The first ASCII character.

   @param  B    The second ASCII character.

   @param  C    The third ASCII character.