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![Timo Kreuzer](/assets/img/avatar_default.png)
Symbol loading leads to a hang on x64 boot in 2nd stage and KDBG symbols don't work on x64 anyway.
470 lines
15 KiB
C
470 lines
15 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/kdbg/kdb_symbols.c
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* PURPOSE: Getting symbol information...
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*
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* PROGRAMMERS: David Welch (welch@cwcom.net)
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* Colin Finck (colin@reactos.org)
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*/
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/* INCLUDES *****************************************************************/
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#include <ntoskrnl.h>
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#include "kdb.h"
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#define NDEBUG
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#include "debug.h"
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/* GLOBALS ******************************************************************/
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typedef struct _IMAGE_SYMBOL_INFO_CACHE
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{
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LIST_ENTRY ListEntry;
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ULONG RefCount;
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UNICODE_STRING FileName;
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PROSSYM_INFO RosSymInfo;
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}
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IMAGE_SYMBOL_INFO_CACHE, *PIMAGE_SYMBOL_INFO_CACHE;
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static BOOLEAN LoadSymbols = FALSE;
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static LIST_ENTRY SymbolsToLoad;
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static KSPIN_LOCK SymbolsToLoadLock;
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static KEVENT SymbolsToLoadEvent;
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/* FUNCTIONS ****************************************************************/
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static
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BOOLEAN
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KdbpSymSearchModuleList(
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IN PLIST_ENTRY current_entry,
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IN PLIST_ENTRY end_entry,
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IN PLONG Count,
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IN PVOID Address,
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IN INT Index,
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OUT PLDR_DATA_TABLE_ENTRY* pLdrEntry)
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{
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while (current_entry && current_entry != end_entry)
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{
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*pLdrEntry = CONTAINING_RECORD(current_entry, LDR_DATA_TABLE_ENTRY, InLoadOrderLinks);
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if ((Address && Address >= (PVOID)(*pLdrEntry)->DllBase && Address < (PVOID)((ULONG_PTR)(*pLdrEntry)->DllBase + (*pLdrEntry)->SizeOfImage)) ||
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(Index >= 0 && (*Count)++ == Index))
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{
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return TRUE;
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}
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current_entry = current_entry->Flink;
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}
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return FALSE;
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}
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/*! \brief Find a module...
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*
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* \param Address If \a Address is not NULL the module containing \a Address
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* is searched.
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* \param Name If \a Name is not NULL the module named \a Name will be
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* searched.
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* \param Index If \a Index is >= 0 the Index'th module will be returned.
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* \param pLdrEntry Pointer to a PLDR_DATA_TABLE_ENTRY which is filled.
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*
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* \retval TRUE Module was found, \a pLdrEntry was filled.
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* \retval FALSE No module was found.
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*/
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BOOLEAN
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KdbpSymFindModule(
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IN PVOID Address OPTIONAL,
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IN INT Index OPTIONAL,
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OUT PLDR_DATA_TABLE_ENTRY* pLdrEntry)
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{
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LONG Count = 0;
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PEPROCESS CurrentProcess;
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/* First try to look up the module in the kernel module list. */
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KeAcquireSpinLockAtDpcLevel(&PsLoadedModuleSpinLock);
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if(KdbpSymSearchModuleList(PsLoadedModuleList.Flink,
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&PsLoadedModuleList,
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&Count,
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Address,
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Index,
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pLdrEntry))
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{
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KeReleaseSpinLockFromDpcLevel(&PsLoadedModuleSpinLock);
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return TRUE;
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}
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KeReleaseSpinLockFromDpcLevel(&PsLoadedModuleSpinLock);
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/* That didn't succeed. Try the module list of the current process now. */
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CurrentProcess = PsGetCurrentProcess();
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if(!CurrentProcess || !CurrentProcess->Peb || !CurrentProcess->Peb->Ldr)
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return FALSE;
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return KdbpSymSearchModuleList(CurrentProcess->Peb->Ldr->InLoadOrderModuleList.Flink,
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&CurrentProcess->Peb->Ldr->InLoadOrderModuleList,
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&Count,
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Address,
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Index,
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pLdrEntry);
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}
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static
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PCHAR
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NTAPI
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KdbpSymUnicodeToAnsi(IN PUNICODE_STRING Unicode,
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OUT PCHAR Ansi,
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IN ULONG Length)
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{
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PCHAR p;
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PWCHAR pw;
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ULONG i;
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/* Set length and normalize it */
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i = Unicode->Length / sizeof(WCHAR);
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i = min(i, Length - 1);
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/* Set source and destination, and copy */
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pw = Unicode->Buffer;
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p = Ansi;
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while (i--) *p++ = (CHAR)*pw++;
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/* Null terminate and return */
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*p = ANSI_NULL;
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return Ansi;
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}
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/*! \brief Print address...
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*
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* Tries to lookup line number, file name and function name for the given
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* address and prints it.
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* If no such information is found the address is printed in the format
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* <module: offset>, otherwise the format will be
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* <module: offset (filename:linenumber (functionname))>
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*
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* \retval TRUE Module containing \a Address was found, \a Address was printed.
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* \retval FALSE No module containing \a Address was found, nothing was printed.
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*/
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BOOLEAN
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KdbSymPrintAddress(
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IN PVOID Address,
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IN PCONTEXT Context)
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{
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PLDR_DATA_TABLE_ENTRY LdrEntry;
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ULONG_PTR RelativeAddress;
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BOOLEAN Printed = FALSE;
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CHAR ModuleNameAnsi[64];
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if (!KdbpSymFindModule(Address, -1, &LdrEntry))
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return FALSE;
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RelativeAddress = (ULONG_PTR)Address - (ULONG_PTR)LdrEntry->DllBase;
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KdbpSymUnicodeToAnsi(&LdrEntry->BaseDllName,
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ModuleNameAnsi,
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sizeof(ModuleNameAnsi));
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if (LdrEntry->PatchInformation)
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{
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ULONG LineNumber;
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CHAR FileName[256];
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CHAR FunctionName[256];
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if (RosSymGetAddressInformation(LdrEntry->PatchInformation,
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RelativeAddress,
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&LineNumber,
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FileName,
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FunctionName))
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{
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KdbPrintf("<%s:%x (%s:%d (%s))>",
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ModuleNameAnsi, RelativeAddress,
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FileName, LineNumber, FunctionName);
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Printed = TRUE;
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}
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}
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if (!Printed)
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{
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/* Just print module & address */
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KdbPrintf("<%s:%x>", ModuleNameAnsi, RelativeAddress);
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}
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return TRUE;
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}
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static KSTART_ROUTINE LoadSymbolsRoutine;
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/*! \brief The symbol loader thread routine.
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* This opens the image file for reading and loads the symbols
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* section from there.
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*
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* \note We must do this because KdbSymProcessSymbols is
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* called at high IRQL and we can't set the event from here
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*
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* \param Context Unused
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*/
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_Use_decl_annotations_
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VOID
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NTAPI
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LoadSymbolsRoutine(
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_In_ PVOID Context)
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{
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UNREFERENCED_PARAMETER(Context);
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while (TRUE)
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{
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PLIST_ENTRY ListEntry;
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NTSTATUS Status = KeWaitForSingleObject(&SymbolsToLoadEvent, WrKernel, KernelMode, FALSE, NULL);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("KeWaitForSingleObject failed?! 0x%08x\n", Status);
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LoadSymbols = FALSE;
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return;
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}
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while ((ListEntry = ExInterlockedRemoveHeadList(&SymbolsToLoad, &SymbolsToLoadLock)))
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{
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PLDR_DATA_TABLE_ENTRY LdrEntry = CONTAINING_RECORD(ListEntry, LDR_DATA_TABLE_ENTRY, InInitializationOrderLinks);
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HANDLE FileHandle;
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OBJECT_ATTRIBUTES Attrib;
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IO_STATUS_BLOCK Iosb;
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InitializeObjectAttributes(&Attrib, &LdrEntry->FullDllName, OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE, NULL, NULL);
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DPRINT1("Trying %wZ\n", &LdrEntry->FullDllName);
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Status = ZwOpenFile(&FileHandle,
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FILE_READ_ACCESS | SYNCHRONIZE,
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&Attrib,
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&Iosb,
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FILE_SHARE_READ,
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FILE_SYNCHRONOUS_IO_NONALERT);
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if (!NT_SUCCESS(Status))
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{
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/* Try system paths */
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static const UNICODE_STRING System32Dir = RTL_CONSTANT_STRING(L"\\SystemRoot\\system32\\");
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UNICODE_STRING ImagePath;
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WCHAR ImagePathBuffer[256];
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RtlInitEmptyUnicodeString(&ImagePath, ImagePathBuffer, sizeof(ImagePathBuffer));
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RtlCopyUnicodeString(&ImagePath, &System32Dir);
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RtlAppendUnicodeStringToString(&ImagePath, &LdrEntry->BaseDllName);
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InitializeObjectAttributes(&Attrib, &ImagePath, OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE, NULL, NULL);
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DPRINT1("Trying %wZ\n", &ImagePath);
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Status = ZwOpenFile(&FileHandle,
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FILE_READ_ACCESS | SYNCHRONIZE,
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&Attrib,
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&Iosb,
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FILE_SHARE_READ,
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FILE_SYNCHRONOUS_IO_NONALERT);
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if (!NT_SUCCESS(Status))
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{
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static const UNICODE_STRING DriversDir= RTL_CONSTANT_STRING(L"\\SystemRoot\\system32\\drivers\\");
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RtlInitEmptyUnicodeString(&ImagePath, ImagePathBuffer, sizeof(ImagePathBuffer));
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RtlCopyUnicodeString(&ImagePath, &DriversDir);
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RtlAppendUnicodeStringToString(&ImagePath, &LdrEntry->BaseDllName);
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InitializeObjectAttributes(&Attrib, &ImagePath, OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE, NULL, NULL);
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DPRINT1("Trying %wZ\n", &ImagePath);
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Status = ZwOpenFile(&FileHandle,
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FILE_READ_ACCESS | SYNCHRONIZE,
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&Attrib,
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&Iosb,
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FILE_SHARE_READ,
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FILE_SYNCHRONOUS_IO_NONALERT);
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}
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}
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("Failed opening file %wZ (%wZ) for reading symbols (0x%08x)\n", &LdrEntry->FullDllName, &LdrEntry->BaseDllName, Status);
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/* We took a ref previously */
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MmUnloadSystemImage(LdrEntry);
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continue;
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}
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/* Hand it to Rossym */
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if (!RosSymCreateFromFile(&FileHandle, (PROSSYM_INFO*)&LdrEntry->PatchInformation))
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LdrEntry->PatchInformation = NULL;
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/* We're done for this one. */
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NtClose(FileHandle);
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MmUnloadSystemImage(LdrEntry);
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}
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}
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}
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/*! \brief Load symbols from image mapping. If this fails,
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*
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* \param LdrEntry The entry to load symbols from
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*/
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VOID
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KdbSymProcessSymbols(
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_Inout_ PLDR_DATA_TABLE_ENTRY LdrEntry,
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_In_ BOOLEAN Load)
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{
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if (!LoadSymbols)
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return;
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/* Check if this is unload */
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if (!Load)
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{
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/* Did we process it */
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if (LdrEntry->PatchInformation)
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{
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RosSymDelete(LdrEntry->PatchInformation);
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LdrEntry->PatchInformation = NULL;
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}
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return;
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}
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if (RosSymCreateFromMem(LdrEntry->DllBase, LdrEntry->SizeOfImage, (PROSSYM_INFO*)&LdrEntry->PatchInformation))
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{
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return;
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}
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/* Add a ref until we really process it */
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LdrEntry->LoadCount++;
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/* Tell our worker thread to read from it */
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KeAcquireSpinLockAtDpcLevel(&SymbolsToLoadLock);
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InsertTailList(&SymbolsToLoad, &LdrEntry->InInitializationOrderLinks);
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KeReleaseSpinLockFromDpcLevel(&SymbolsToLoadLock);
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KeSetEvent(&SymbolsToLoadEvent, IO_NO_INCREMENT, FALSE);
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}
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/**
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* @brief Initializes the KDB symbols implementation.
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*
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* @param[in] BootPhase
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* Phase of initialization.
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*
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* @return
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* TRUE if symbols are to be loaded at this given BootPhase; FALSE if not.
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**/
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BOOLEAN
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KdbSymInit(
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_In_ ULONG BootPhase)
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{
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#if 1 // FIXME: This is a workaround HACK!!
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static BOOLEAN OrigLoadSymbols = FALSE;
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#endif
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DPRINT("KdbSymInit() BootPhase=%d\n", BootPhase);
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if (BootPhase == 0)
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{
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PSTR CommandLine;
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SHORT Found = FALSE;
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CHAR YesNo;
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/* By default, load symbols in DBG builds, but not in REL builds
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or anything other than x86, because they only work on x86
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and can cause the system to hang on x64. */
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#if DBG && defined(_M_IX86)
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LoadSymbols = TRUE;
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#else
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LoadSymbols = FALSE;
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#endif
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/* Check the command line for LOADSYMBOLS, NOLOADSYMBOLS,
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* LOADSYMBOLS={YES|NO}, NOLOADSYMBOLS={YES|NO} */
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ASSERT(KeLoaderBlock);
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CommandLine = KeLoaderBlock->LoadOptions;
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while (*CommandLine)
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{
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/* Skip any whitespace */
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while (isspace(*CommandLine))
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++CommandLine;
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Found = 0;
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if (_strnicmp(CommandLine, "LOADSYMBOLS", 11) == 0)
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{
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Found = +1;
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CommandLine += 11;
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}
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else if (_strnicmp(CommandLine, "NOLOADSYMBOLS", 13) == 0)
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{
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Found = -1;
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CommandLine += 13;
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}
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if (Found != 0)
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{
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if (*CommandLine == '=')
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{
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++CommandLine;
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YesNo = toupper(*CommandLine);
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if (YesNo == 'N' || YesNo == '0')
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{
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Found = -1 * Found;
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}
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}
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LoadSymbols = (0 < Found);
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}
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/* Move on to the next option */
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while (*CommandLine && !isspace(*CommandLine))
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++CommandLine;
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}
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#if 1 // FIXME: This is a workaround HACK!!
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// Save the actual value of LoadSymbols but disable it for BootPhase 0.
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OrigLoadSymbols = LoadSymbols;
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LoadSymbols = FALSE;
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return OrigLoadSymbols;
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#endif
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}
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else if (BootPhase == 1)
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{
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HANDLE Thread;
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NTSTATUS Status;
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KIRQL OldIrql;
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PLIST_ENTRY ListEntry;
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#if 1 // FIXME: This is a workaround HACK!!
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// Now, restore the actual value of LoadSymbols.
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LoadSymbols = OrigLoadSymbols;
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#endif
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/* Do not continue loading symbols if we have less than 96MB of RAM */
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if (MmNumberOfPhysicalPages < (96 * 1024 * 1024 / PAGE_SIZE))
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LoadSymbols = FALSE;
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/* Continue this phase only if we need to load symbols */
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if (!LoadSymbols)
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return LoadSymbols;
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/* Launch our worker thread */
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InitializeListHead(&SymbolsToLoad);
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KeInitializeSpinLock(&SymbolsToLoadLock);
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KeInitializeEvent(&SymbolsToLoadEvent, SynchronizationEvent, FALSE);
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Status = PsCreateSystemThread(&Thread,
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THREAD_ALL_ACCESS,
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NULL, NULL, NULL,
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LoadSymbolsRoutine,
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NULL);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("Failed starting symbols loader thread: 0x%08x\n", Status);
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LoadSymbols = FALSE;
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return LoadSymbols;
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}
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RosSymInitKernelMode();
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KeAcquireSpinLock(&PsLoadedModuleSpinLock, &OldIrql);
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for (ListEntry = PsLoadedModuleList.Flink;
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ListEntry != &PsLoadedModuleList;
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ListEntry = ListEntry->Flink)
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{
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PLDR_DATA_TABLE_ENTRY LdrEntry = CONTAINING_RECORD(ListEntry, LDR_DATA_TABLE_ENTRY, InLoadOrderLinks);
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KdbSymProcessSymbols(LdrEntry, TRUE);
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}
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KeReleaseSpinLock(&PsLoadedModuleSpinLock, OldIrql);
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}
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return LoadSymbols;
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}
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/* EOF */
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