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75 lines
1.3 KiB
ArmAsm
75 lines
1.3 KiB
ArmAsm
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
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* PURPOSE: ReactOS AMD64 user mode callback helper
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* COPYRIGHT: Timo Kreuzer (timo.kreuzer@reactos.org)
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*/
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#include <ksamd64.inc>
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/*
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* NTSTATUS
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* KiUserModeCallout (
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* _Inout_ PKCALLOUT_FRAME CalloutFrame);
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*/
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EXTERN KiUserModeCallout:PROC
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.code64
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/*
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* NTSTATUS
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* KiCallUserMode (
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* _In_ PVOID *OutputBuffer@<rcx>,
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* _In_ PULONG OutputLength@<rdx>);
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*/
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PUBLIC KiCallUserMode
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.PROC KiCallUserMode
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/* Generate a KEXCEPTION_FRAME on the stack */
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/* This is identical to a KCALLOUT_FRAME */
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GENERATE_EXCEPTION_FRAME
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/* Save OutputBuffer and OutputLength */
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mov [rsp + ExOutputBuffer], rcx
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mov [rsp + ExOutputLength], rdx
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/* Call the C function */
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mov rcx, rsp
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call KiUserModeCallout
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/* Restore the registers from the KEXCEPTION_FRAME */
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RESTORE_EXCEPTION_STATE
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/* Return */
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ret
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.ENDP
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/*
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* DECLSPEC_NORETURN
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* VOID
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* KiCallbackReturn (
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* _In_ PVOID Stack,
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* _In_ NTSTATUS Status);
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*/
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PUBLIC KiCallbackReturn
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.PROC KiCallbackReturn
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.ENDPROLOG
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/* Restore the stack */
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mov rsp, rcx
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/* Set return status */
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mov eax, edx
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/* Restore the registers from the KEXCEPTION_FRAME */
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RESTORE_EXCEPTION_STATE
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/* Return */
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ret
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.ENDP
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END
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