124 lines
3.1 KiB
NASM
124 lines
3.1 KiB
NASM
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title "Asynchronous Procedure Call Interrupt"
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;++
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;
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; Copyright (c) 2000 Microsoft Corporation
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;
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; Module Name:
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;
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; apcint.asm
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;
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; Abstract:
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;
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; This module implements the code necessary to process the Asynchronous
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; Procedure Call interrupt request.
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;
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; Author:
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;
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; David N. Cutler (davec) 10-Nov-2000
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;
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; Environment:
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;
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; Kernel mode only.
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;
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;--
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extern KiDeliverApc:proc
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extern __imp_HalEndSystemInterrupt:qword
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include ksamd64.inc
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subttl "Asynchronous Procedure Call Interrupt"
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;++
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;
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; VOID
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; KiApcInterrupt (
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; VOID
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; )
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;
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; Routine Description:
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;
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; This routine is entered as the result of a software interrupt generated
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; at APC_LEVEL. Its function is to save the machine state and call the APC
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; delivery routine.
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;
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; N.B. This is a directly connected interrupt that does not use an interrupt
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; object.
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;
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; N.B. APC interrupts are never requested for user mode APCs.
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;
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; Arguments:
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;
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; None.
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;
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; Return Value:
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;
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; None.
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;
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;--
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NESTED_ENTRY KiApcInterrupt, _TEXT$00
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.pushframe ; mark machine frame
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push_reg rbp ; push dummy vector
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push_reg rbp ; save nonvolatile register
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GENERATE_INTERRUPT_FRAME ; generate interrupt frame
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mov ecx, APC_LEVEL ; set new IRQL level
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ENTER_INTERRUPT ; raise IRQL, do EOI, enable interrupts
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mov cl, KernelMode ; set APC processor mode
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xor edx, edx ; set exception frame address
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lea r8, (-128)[rbp] ; set trap frame address
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call KiDeliverApc ; initiate APC execution
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EXIT_INTERRUPT <NoEOI> ; lower IRQL and restore state
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NESTED_END KiApcInterrupt, _TEXT$00
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subttl "Initiate User APC Execution"
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;++
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;
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; Routine Description:
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;
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; This routine generates an exception frame and attempts to deliver a user
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; APC.
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;
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; Arguments:
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;
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; rbp - Supplies the address of the trap frame.
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;
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; rsp - Supplies the address of the trap frame.
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;
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; Return value:
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;
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; None.
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;
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;--
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NESTED_ENTRY KiInitiateUserApc, _TEXT$00
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GENERATE_EXCEPTION_FRAME ; generate exception frame
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lea rbx, (KTRAP_FRAME_LENGTH - 128)[rbp] ; get save area address
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fnsaved [rbx] ; save legacy floating state
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mov cl, UserMode ; set APC processor mode
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mov rdx, rsp ; set exception frame address
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lea r8, (-128)[rbp] ; set trap frame address
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call KiDeliverApc ; deliver APC
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mov ax, LfControlWord[rbx] ; save current control word
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mov word ptr LfControlWord[rbx], 03fh ; set to mask all exceptions
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frstord [rbx] ; restore legacy floating state
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mov LfControlWord[rbx], ax ; restore control word
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fldcw word ptr LfControlWord[rbx] ; load legacy control word
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RESTORE_EXCEPTION_STATE ; restore exception state/deallocate
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ret ; return
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NESTED_END KiInitiateUserApc, _TEXT$00
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end
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