mirror of
https://github.com/reactos/reactos.git
synced 2024-11-10 00:34:39 +00:00
381 lines
13 KiB
C
381 lines
13 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: ntoskrnl/kd64/kdinit.c
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* PURPOSE: KD64 Initialization Code
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* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
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* Stefan Ginsberg (stefan.ginsberg@reactos.org)
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*/
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/* INCLUDES ******************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS *****************************************************************/
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VOID
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NTAPI
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KdUpdateDataBlock(VOID)
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{
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/* Update the KeUserCallbackDispatcher pointer */
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KdDebuggerDataBlock.KeUserCallbackDispatcher =
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(ULONG_PTR)KeUserCallbackDispatcher;
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}
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BOOLEAN
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NTAPI
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KdRegisterDebuggerDataBlock(IN ULONG Tag,
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IN PDBGKD_DEBUG_DATA_HEADER64 DataHeader,
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IN ULONG Size)
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{
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KIRQL OldIrql;
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PLIST_ENTRY NextEntry;
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PDBGKD_DEBUG_DATA_HEADER64 CurrentHeader;
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/* Acquire the Data Lock */
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KeAcquireSpinLock(&KdpDataSpinLock, &OldIrql);
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/* Loop the debugger data list */
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NextEntry = KdpDebuggerDataListHead.Flink;
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while (NextEntry != &KdpDebuggerDataListHead)
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{
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/* Get the header for this entry */
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CurrentHeader = CONTAINING_RECORD(NextEntry,
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DBGKD_DEBUG_DATA_HEADER64,
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List);
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/* Move to the next one */
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NextEntry = NextEntry->Flink;
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/* Check if we already have this data block */
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if ((CurrentHeader == DataHeader) || (CurrentHeader->OwnerTag == Tag))
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{
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/* Release the lock and fail */
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KeReleaseSpinLock(&KdpDataSpinLock, OldIrql);
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return FALSE;
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}
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}
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/* Setup the header */
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DataHeader->OwnerTag = Tag;
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DataHeader->Size = Size;
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/* Insert it into the list and release the lock */
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InsertTailList(&KdpDebuggerDataListHead, (PLIST_ENTRY)&DataHeader->List);
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KeReleaseSpinLock(&KdpDataSpinLock, OldIrql);
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return TRUE;
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}
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BOOLEAN
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NTAPI
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INIT_FUNCTION
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KdInitSystem(IN ULONG BootPhase,
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IN PLOADER_PARAMETER_BLOCK LoaderBlock)
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{
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BOOLEAN EnableKd, DisableKdAfterInit = FALSE, BlockEnable;
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LPSTR CommandLine, DebugLine, DebugOptionStart, DebugOptionEnd;
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STRING ImageName;
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PLDR_DATA_TABLE_ENTRY LdrEntry;
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PLIST_ENTRY NextEntry;
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ULONG i, j, Length, DebugOptionLength;
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CHAR NameBuffer[256];
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PWCHAR Name;
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#if defined(__GNUC__)
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/* Make gcc happy */
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BlockEnable = FALSE;
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#endif
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/* Check if this is Phase 1 */
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if (BootPhase)
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{
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/* Just query the performance counter */
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KeQueryPerformanceCounter(&KdPerformanceCounterRate);
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return TRUE;
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}
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/* Check if we already initialized once */
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if (KdDebuggerEnabled) return TRUE;
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/* Set the Debug Routine as the Stub for now */
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KiDebugRoutine = KdpStub;
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/* Disable break after symbol load for now */
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KdBreakAfterSymbolLoad = FALSE;
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/* Check if the Debugger Data Block was already initialized */
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if (!KdpDebuggerDataListHead.Flink)
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{
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/* It wasn't...Initialize the KD Data Listhead */
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InitializeListHead(&KdpDebuggerDataListHead);
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/* Register the Debugger Data Block */
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KdRegisterDebuggerDataBlock(KDBG_TAG,
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&KdDebuggerDataBlock.Header,
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sizeof(KdDebuggerDataBlock));
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/* Fill out the KD Version Block */
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KdVersionBlock.MajorVersion = (USHORT)((DBGKD_MAJOR_NT << 8) | (NtBuildNumber >> 28));
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KdVersionBlock.MinorVersion = (USHORT)(NtBuildNumber & 0xFFFF);
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#ifdef CONFIG_SMP
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/* This is an MP Build */
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KdVersionBlock.Flags |= DBGKD_VERS_FLAG_MP;
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#endif
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/* Save Pointers to Loaded Module List and Debugger Data */
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KdVersionBlock.PsLoadedModuleList = (ULONG64)(LONG_PTR)&PsLoadedModuleList;
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KdVersionBlock.DebuggerDataList = (ULONG64)(LONG_PTR)&KdpDebuggerDataListHead;
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/* Set protocol limits */
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KdVersionBlock.MaxStateChange = DbgKdMaximumStateChange -
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DbgKdMinimumStateChange;
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KdVersionBlock.MaxManipulate = DbgKdMaximumManipulate -
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DbgKdMinimumManipulate;
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KdVersionBlock.Unused[0] = 0;
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/* Link us in the KPCR */
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KeGetPcr()->KdVersionBlock = &KdVersionBlock;
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}
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/* Check if we have a loader block */
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if (LoaderBlock)
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{
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/* Get the image entry */
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LdrEntry = CONTAINING_RECORD(LoaderBlock->LoadOrderListHead.Flink,
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LDR_DATA_TABLE_ENTRY,
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InLoadOrderLinks);
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/* Save the Kernel Base */
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PsNtosImageBase = (ULONG_PTR)LdrEntry->DllBase;
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KdVersionBlock.KernBase = (ULONG64)(LONG_PTR)LdrEntry->DllBase;
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/* Check if we have a command line */
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CommandLine = LoaderBlock->LoadOptions;
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if (CommandLine)
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{
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/* Upcase it */
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_strupr(CommandLine);
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/* Assume we'll disable KD */
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EnableKd = FALSE;
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/* Check for CRASHDEBUG, NODEBUG and just DEBUG */
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if (strstr(CommandLine, "CRASHDEBUG"))
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{
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/* Don't enable KD now, but allow it to be enabled later */
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KdPitchDebugger = FALSE;
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}
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else if (strstr(CommandLine, "NODEBUG"))
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{
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/* Don't enable KD and don't let it be enabled later */
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KdPitchDebugger = TRUE;
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}
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else if ((DebugLine = strstr(CommandLine, "DEBUG")) != NULL)
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{
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/* Enable KD */
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EnableKd = TRUE;
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/* Check if there are any options */
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if (DebugLine[5] == '=')
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{
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/* Save pointers */
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DebugOptionStart = DebugOptionEnd = &DebugLine[6];
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/* Scan the string for debug options */
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for (;;)
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{
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/* Loop until we reach the end of the string */
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while (*DebugOptionEnd != ANSI_NULL)
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{
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/* Check if this is a comma, a space or a tab */
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if ((*DebugOptionEnd == ',') ||
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(*DebugOptionEnd == ' ') ||
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(*DebugOptionEnd == ' '))
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{
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/*
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* We reached the end of the option or
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* the end of the string, break out
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*/
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break;
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}
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else
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{
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/* Move on to the next character */
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DebugOptionEnd++;
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}
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}
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/* Calculate the length of the current option */
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DebugOptionLength = ((ULONG_PTR)DebugOptionEnd -
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(ULONG_PTR)DebugOptionStart);
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/*
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* Break out if we reached the last option
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* or if there were no options at all
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*/
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if (!DebugOptionLength) break;
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/* Now check which option this is */
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if ((DebugOptionLength == 10) &&
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!(strncmp(DebugOptionStart, "AUTOENABLE", 10)))
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{
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/*
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* Disable the debugger, but
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* allow it to be reenabled
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*/
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DisableKdAfterInit = TRUE;
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BlockEnable = FALSE;
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KdAutoEnableOnEvent = TRUE;
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}
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else if ((DebugOptionLength == 7) &&
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!(strncmp(DebugOptionStart, "DISABLE", 7)))
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{
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/* Disable the debugger */
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DisableKdAfterInit = TRUE;
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BlockEnable = TRUE;
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KdAutoEnableOnEvent = FALSE;
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}
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else if ((DebugOptionLength == 6) &&
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!(strncmp(DebugOptionStart, "NOUMEX", 6)))
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{
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/* Ignore user mode exceptions */
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KdIgnoreUmExceptions = TRUE;
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}
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/*
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* If there are more options then
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* the next character should be a comma
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*/
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if (*DebugOptionEnd != ',')
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{
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/* It isn't, break out */
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break;
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}
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/* Move on to the next option */
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DebugOptionEnd++;
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DebugOptionStart = DebugOptionEnd;
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}
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}
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}
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}
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else
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{
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/* No command line options? Disable debugger by default */
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KdPitchDebugger = TRUE;
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EnableKd = FALSE;
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}
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}
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else
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{
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/* Called from a bugcheck or a re-enable. Save the Kernel Base */
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KdVersionBlock.KernBase = (ULONG64)(LONG_PTR)PsNtosImageBase;
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/* Unconditionally enable KD */
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EnableKd = TRUE;
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}
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/* Set the Kernel Base in the Data Block */
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KdDebuggerDataBlock.KernBase = (ULONG_PTR)KdVersionBlock.KernBase;
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/* Initialize the debugger if requested */
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if ((EnableKd) && (NT_SUCCESS(KdDebuggerInitialize0(LoaderBlock))))
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{
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/* Now set our real KD routine */
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KiDebugRoutine = KdpTrap;
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/* Check if we've already initialized our structures */
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if (!KdpDebuggerStructuresInitialized)
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{
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/* Set the Debug Switch Routine and Retries*/
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KdpContext.KdpDefaultRetries = 20;
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KiDebugSwitchRoutine = KdpSwitchProcessor;
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/* Initialize the Time Slip DPC */
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KeInitializeDpc(&KdpTimeSlipDpc, KdpTimeSlipDpcRoutine, NULL);
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KeInitializeTimer(&KdpTimeSlipTimer);
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ExInitializeWorkItem(&KdpTimeSlipWorkItem, KdpTimeSlipWork, NULL);
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/* First-time initialization done! */
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KdpDebuggerStructuresInitialized = TRUE;
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}
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/* Initialize the timer */
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KdTimerStart.QuadPart = 0;
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/* Officially enable KD */
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KdPitchDebugger = FALSE;
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KdDebuggerEnabled = TRUE;
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/* Let user-mode know that it's enabled as well */
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#undef KdDebuggerEnabled
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SharedUserData->KdDebuggerEnabled = TRUE;
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#define KdDebuggerEnabled _KdDebuggerEnabled
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/* Check if the debugger should be disabled initially */
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if (DisableKdAfterInit)
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{
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/* Disable it */
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KdDisableDebuggerWithLock(FALSE);
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/*
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* Save the enable block state and return initialized
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* (the debugger is active but disabled).
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*/
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KdBlockEnable = BlockEnable;
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return TRUE;
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}
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/* Check if we have a loader block */
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if (LoaderBlock)
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{
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/* Loop boot images */
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NextEntry = LoaderBlock->LoadOrderListHead.Flink;
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i = 0;
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while ((NextEntry != &LoaderBlock->LoadOrderListHead) && (i < 2))
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{
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/* Get the image entry */
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LdrEntry = CONTAINING_RECORD(NextEntry,
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LDR_DATA_TABLE_ENTRY,
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InLoadOrderLinks);
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/* Generate the image name */
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Name = LdrEntry->FullDllName.Buffer;
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Length = LdrEntry->FullDllName.Length / sizeof(WCHAR);
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j = 0;
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do
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{
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/* Do cheap Unicode to ANSI conversion */
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NameBuffer[j++] = (CHAR)*Name++;
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} while (j < Length);
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/* Null-terminate */
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NameBuffer[j] = ANSI_NULL;
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/* Load symbols for image */
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RtlInitString(&ImageName, NameBuffer);
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DbgLoadImageSymbols(&ImageName,
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LdrEntry->DllBase,
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(ULONG_PTR)ZwCurrentProcess());
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/* Go to the next entry */
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NextEntry = NextEntry->Flink;
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i++;
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}
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}
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/* Check for incoming breakin and break on symbol load if we have it*/
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KdBreakAfterSymbolLoad = KdPollBreakIn();
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}
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else
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{
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/* Disable debugger */
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KdDebuggerNotPresent = TRUE;
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}
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/* Return initialized */
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return TRUE;
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}
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