80 lines
1.6 KiB
NASM
80 lines
1.6 KiB
NASM
title "User Callback Return"
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; Copyright (c) 1985 - 1999, Microsoft Corporation
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; Module Name:
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; callret.asm
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; Abstract:
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; This module implements the fastpath callback return.
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; Author:
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; David N. Cutler (davec) 21-Dec-95
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; Environment:
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; User mode.
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; Revision History:
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.386p
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.xlist
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include callconv.inc ; calling convention macros
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.list
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_TEXT SEGMENT DWORD PUBLIC 'CODE'
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ASSUME DS:FLAT, ES:FLAT, SS:NOTHING, FS:NOTHING, GS:NOTHING
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page ,132
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subttl "Return from User Mode Callback"
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ifndef BUILD_WOW6432
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; NTSTATUS
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; FASTCALL
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; XyCallbackReturn (
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; IN PVOID OutputBuffer OPTIONAL,
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; IN ULONG OutputLength,
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; IN NTSTATUS Status
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; )
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; Routine Description:
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; This function returns from a user mode callout to the kernel mode
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; caller of the user mode callback function.
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; Arguments:
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; OutputBuffer (ecx) - Supplies an optional pointer to an output buffer.
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; OutputLength (edx) - Supplies the length of the output buffer.
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; Status (esp + 4) - Supplies the status value returned to the caller of the
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; callback function.
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; Return Value:
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; Normally there is no return from this function. If a callbac is not active,
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; then the error status is returned to the caller.
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cPublicFastCall XyCallbackReturn, 3
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mov eax,[esp] + 4 ; get return status value
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int 02bH ; call fast path system service
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fstRET XyCallbackReturn ; return status to caller
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fstENDP XyCallbackReturn
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endif
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_TEXT ends
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end
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