cd8ff8fdda
This moves all of the Xen hypercall code that was private to XenBusDxe to a new library class XenHypercallLib. This will allow us to reimplement it for ARM, and to export the Xen hypercall functionality to other parts of the code, such as a Xen console SerialPortLib driver. Contributed-under: TianoCore Contribution Agreement 1.0 Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Laszlo Ersek <lersek@redhat.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16970 6f19259b-4bc3-4df7-8a09-765794883524
26 lines
565 B
NASM
26 lines
565 B
NASM
SECTION .text
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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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global ASM_PFX(__XenHypercall2)
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ASM_PFX(__XenHypercall2):
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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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