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76 lines
1.3 KiB
ArmAsm
76 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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