abcbbb14a4
Change in V4:
- Replace the license by the commonly used file header text.
- add file header to XenHypercall.h (license, copyright, brief desc)
Change in V3:
- adding IA32 support. (not reviewed yet)
both XenBusDxe/Ia32/hypercall.{S,asm} file are new
Change in V2:
- file header, copyright
- Add License
- Add push/pop instruction.
- fix types
- Comment of exported functions
- Improve coding style
- Add error handling in the main init function (of the drivers)
- Comment assembly
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16260 6f19259b-4bc3-4df7-8a09-765794883524
27 lines
540 B
NASM
27 lines
540 B
NASM
.code
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; INTN
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; EFIAPI
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; XenHypercall2 (
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; IN VOID *HypercallAddr,
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; IN OUT INTN Arg1,
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; IN OUT INTN Arg2
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; );
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XenHypercall2 PROC
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; Save only ebx, ecx is supposed to be a scratch register and needs to be
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; saved by the caller
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push ebx
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; Copy HypercallAddr to eax
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mov eax, [esp + 8]
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; Copy Arg1 to the register expected by Xen
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mov ebx, [esp + 12]
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; Copy Arg2 to the register expected by Xen
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mov ecx, [esp + 16]
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; Call HypercallAddr
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call eax
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pop ebx
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ret
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XenHypercall2 ENDP
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END
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