mirror of
https://github.com/reactos/reactos.git
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126768af64
svn path=/trunk/; revision=527
227 lines
7.1 KiB
C
227 lines
7.1 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: ntoskrnl/ke/apc.c
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* PURPOSE: Possible implementation of APCs
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* PROGRAMMER: David Welch (welch@cwcom.net)
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* UPDATE HISTORY:
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* Created 22/05/98
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*/
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/* INCLUDES *****************************************************************/
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#include <ddk/ntddk.h>
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#include <string.h>
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#include <internal/string.h>
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#include <internal/i386/segment.h>
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#include <internal/ps.h>
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#define NDEBUG
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#include <internal/debug.h>
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extern VOID KeApcProlog(VOID);
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/* FUNCTIONS *****************************************************************/
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BOOLEAN KiTestAlert(PKTHREAD Thread,
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PCONTEXT UserContext)
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/*
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* FUNCTION: Tests whether there are any pending APCs for the current thread
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* and if so the APCs will be delivered on exit from kernel mode.
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* ARGUMENTS:
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* Thread = Thread to test for alerts
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* UserContext = The user context saved on entry to kernel mode
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*/
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{
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PLIST_ENTRY current_entry;
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PKAPC Apc;
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PULONG Esp = (PULONG)UserContext->Esp;
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current_entry = Thread->ApcState.ApcListHead[0].Flink;
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while (current_entry != &Thread->ApcState.ApcListHead[0])
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{
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Apc = CONTAINING_RECORD(current_entry, KAPC, ApcListEntry);
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Esp = Esp - 16;
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Esp[0] = (ULONG)Apc->SystemArgument2;
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Esp[1] = (ULONG)Apc->SystemArgument1;
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Esp[2] = (ULONG)Apc->NormalContext;
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Esp[3] = UserContext->Eip;
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UserContext->Eip = (ULONG)Apc->NormalRoutine;
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current_entry = current_entry->Flink;
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}
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return(TRUE);
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}
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VOID KeApcProlog2(PKAPC Apc)
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/*
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* FUNCTION: This is called from the prolog proper (in assembly) to deliver
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* a kernel APC
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*/
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{
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DPRINT("KeApcProlog2(Apc %x)\n",Apc);
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Apc->KernelRoutine(Apc,
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&Apc->NormalRoutine,
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&Apc->NormalContext,
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&Apc->SystemArgument2,
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&Apc->SystemArgument2);
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PsSuspendThread(CONTAINING_RECORD(Apc->Thread,ETHREAD,Tcb));
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}
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VOID KeDeliverKernelApc(PKAPC Apc)
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/*
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* FUNCTION: Simulates an interrupt on the target thread which will transfer
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* control to a kernel mode routine
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*/
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{
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PKTHREAD TargetThread;
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PULONG Stack;
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DPRINT("KeDeliverKernelApc(Apc %x)\n", Apc);
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TargetThread = Apc->Thread;
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if (TargetThread->KernelApcDisable <= 0)
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{
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DbgPrint("Queueing apc for thread %x\n", TargetThread);
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return;
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}
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if (TargetThread == KeGetCurrentThread())
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{
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Apc->KernelRoutine(Apc,
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&Apc->NormalRoutine,
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&Apc->NormalContext,
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&Apc->SystemArgument2,
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&Apc->SystemArgument2);
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return;
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}
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if (TargetThread->Context.cs == KERNEL_CS)
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{
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TargetThread->Context.esp = TargetThread->Context.esp - 16;
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Stack = (PULONG)TargetThread->Context.esp;
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Stack[0] = TargetThread->Context.eax;
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Stack[1] = TargetThread->Context.eip;
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Stack[2] = TargetThread->Context.cs;
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Stack[3] = TargetThread->Context.eflags;
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TargetThread->Context.eip = (ULONG)KeApcProlog;
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TargetThread->Context.eax = (ULONG)Apc;
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}
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else
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{
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TargetThread->Context.esp = TargetThread->Context.esp - 40;
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Stack = (PULONG)TargetThread->Context.esp;
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Stack[9] = TargetThread->Context.gs;
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Stack[8] = TargetThread->Context.fs;
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Stack[7] = TargetThread->Context.ds;
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Stack[6] = TargetThread->Context.es;
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Stack[5] = TargetThread->Context.ss;
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Stack[4] = TargetThread->Context.esp;
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Stack[3] = TargetThread->Context.eflags;
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Stack[2] = TargetThread->Context.cs;
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Stack[1] = TargetThread->Context.eip;
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Stack[0] = TargetThread->Context.eax;
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TargetThread->Context.eip = (ULONG)KeApcProlog;
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TargetThread->Context.eax = (ULONG)Apc;
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}
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PsResumeThread(CONTAINING_RECORD(TargetThread,ETHREAD,Tcb));
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}
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void KeInsertQueueApc(PKAPC Apc,
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PVOID SystemArgument1,
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PVOID SystemArgument2,
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UCHAR Mode)
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{
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KIRQL oldlvl;
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PKTHREAD TargetThread;
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DPRINT("KeInsertQueueApc(Apc %x, SystemArgument1 %x, "
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"SystemArgument2 %x, Mode %d)\n",Apc,SystemArgument1,
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SystemArgument2,Mode);
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KeRaiseIrql(DISPATCH_LEVEL, &oldlvl);
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if (Apc->Inserted)
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{
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DbgPrint("KeInsertQueueApc(): multiple APC insertations\n");
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KeBugCheck(0);
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}
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TargetThread = Apc->Thread;
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InsertTailList(&TargetThread->ApcState.ApcListHead[0], &Apc->ApcListEntry);
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Apc->Inserted = TRUE;
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DPRINT("TargetThread->KernelApcDisable %d\n",
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TargetThread->KernelApcDisable);
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DPRINT("Apc->KernelRoutine %x\n", Apc->KernelRoutine);
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if (Apc->KernelRoutine != NULL)
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{
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KeDeliverKernelApc(Apc);
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}
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KeLowerIrql(oldlvl);
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}
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VOID KeInitializeApc(PKAPC Apc,
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PKTHREAD Thread,
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UCHAR StateIndex,
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PKKERNEL_ROUTINE KernelRoutine,
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PKRUNDOWN_ROUTINE RundownRoutine,
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PKNORMAL_ROUTINE NormalRoutine,
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UCHAR Mode,
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PVOID Context)
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{
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DPRINT("KeInitializeApc(Apc %x, Thread %x, StateIndex %d, "
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"KernelRoutine %x, RundownRoutine %x, NormalRoutine %x, Mode %d, "
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"Context %x)\n",Apc,Thread,StateIndex,KernelRoutine,RundownRoutine,
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NormalRoutine,Mode,Context);
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memset(Apc, 0, sizeof(KAPC));
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Apc->Thread = Thread;
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Apc->ApcListEntry.Flink = NULL;
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Apc->ApcListEntry.Blink = NULL;
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Apc->KernelRoutine = KernelRoutine;
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Apc->RundownRoutine = RundownRoutine;
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Apc->NormalRoutine = NormalRoutine;
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Apc->NormalContext = Context;
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Apc->Inserted = FALSE;
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Apc->ApcStateIndex = StateIndex;
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Apc->ApcMode = Mode;
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}
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NTSTATUS STDCALL NtQueueApcThread(HANDLE ThreadHandle,
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PKNORMAL_ROUTINE ApcRoutine,
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PVOID NormalContext,
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PVOID SystemArgument1,
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PVOID SystemArgument2)
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{
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return(ZwQueueApcThread(ThreadHandle,
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ApcRoutine,
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NormalContext,
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SystemArgument1,
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SystemArgument2));
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}
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NTSTATUS STDCALL ZwQueueApcThread(HANDLE ThreadHandle,
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PKNORMAL_ROUTINE ApcRoutine,
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PVOID NormalContext,
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PVOID SystemArgument1,
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PVOID SystemArgument2)
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{
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UNIMPLEMENTED;
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}
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NTSTATUS STDCALL NtTestAlert(VOID)
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{
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return(ZwTestAlert());
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}
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NTSTATUS STDCALL ZwTestAlert(VOID)
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{
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KiTestAlert(KeGetCurrentThread(),
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NULL /* ?? */);
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return(STATUS_SUCCESS);
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}
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