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

VA_START, VA_END and VA_COPY are the same as the generic macros.
VA_ARG was reverse engineered from MS ARM assembly output.

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 2018-01-12 21:33:30 +08:00 committed by Liming Gao
parent e58427e396
commit 79195517f8
1 changed files with 13 additions and 0 deletions
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13
MdePkg/Include/Base.h
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@ -668,6 +668,19 @@ struct _LIST_ENTRY {
#define VA_COPY(Dest, Start) __va_copy (Dest, Start)
#elif defined(_M_ARM)
//
// 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_END(Marker) (Marker = (VA_LIST) 0)
#define VA_COPY(Dest, Start) ((void)((Dest) = (Start)))
#elif defined(__GNUC__)
#if defined(MDE_CPU_X64) && !defined(NO_MSABI_VA_FUNCS)