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MdePkg/Include: Add VA list support for VS2017/ARM64 

We need to explicitly call the built-in __va_start() for ARM64, otherwise
the variable parameters are not properly enqueued for the next function
calls.
Also do the same for ARM, as as it doesn't harm us.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Pete Batard <pete@akeo.ie>
Reviewed-by: Liming Gao <liming.gao@intel.com>
This commit is contained in:
Pete Batard 2018-02-23 17:50:02 +08:00 committed by Liming Gao
parent da351bdbe2
commit c41100f05f
1 changed files with 3 additions and 4 deletions
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7
MdePkg/Include/Base.h
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@ -668,16 +668,15 @@ struct _LIST_ENTRY {
#define VA_COPY(Dest, Start) __va_copy (Dest, Start)
#elif defined(_M_ARM)
#elif defined(_M_ARM) || defined(_M_ARM64)
//
// MSFT ARM variable argument list support.
// Same as the generic macros below, except for VA_ARG that needs extra adjustment.
//
typedef char* VA_LIST;
#define VA_START(Marker, Parameter) (Marker = (VA_LIST) ((UINTN) & (Parameter) + _INT_SIZE_OF(Parameter)))
#define VA_ARG(Marker, TYPE) (*(TYPE *) ((Marker += _INT_SIZE_OF(TYPE) + ((-(INTN)Marker) & (sizeof(TYPE) - 1))) - _INT_SIZE_OF (TYPE)))
#define VA_START(Marker, Parameter) __va_start (&Marker, &Parameter, _INT_SIZE_OF (Parameter), __alignof(Parameter), &Parameter)
#define VA_ARG(Marker, TYPE) (*(TYPE *) ((Marker += _INT_SIZE_OF (TYPE) + ((-(INTN)Marker) & (sizeof(TYPE) - 1))) - _INT_SIZE_OF (TYPE)))
#define VA_END(Marker) (Marker = (VA_LIST) 0)
#define VA_COPY(Dest, Start) ((void)((Dest) = (Start)))