[ion] 25883: - Fix MmCreateImageSection to use previous mode instead of hardcoding UserMode. - Implement MiProcessLoaderEntry for adding/removing entries on the PsLoadedModuleList. - Move MmLoadSystemImage from loader.c to sysldr.c - Update MmLoadSystemImage: - Use MmSystemLoadLock. - Support returning the entry for an already-loaded image, instead of loading it twice. - Use Section APIs to map the image... we're still doing a dirty ZwReadFile hack, but at least now we can depend on the PE code
23 Feb
2007
23 Feb
'07
5:39 a.m.
Author: ion
Date: Fri Feb 23 08:39:42 2007
New Revision: 25883
URL: http://svn.reactos.org/svn/reactos?rev=25883&view=rev
Log:
- Fix MmCreateImageSection to use previous mode instead of hardcoding UserMode.
- Implement MiProcessLoaderEntry for adding/removing entries on the PsLoadedModuleList.
- Move MmLoadSystemImage from loader.c to sysldr.c
- Update MmLoadSystemImage:
- Use MmSystemLoadLock.
- Support returning the entry for an already-loaded image, instead of loading it twice.
- Use Section APIs to map the image... we're still doing a dirty ZwReadFile hack,
but at least now we can depend on the PE code to validate the image (so removed the
hardcoded validation).
- Add more generic cleanup got so we can just jump to it.
- Add more stub code and detection code for upcoming features.
Modified:
trunk/reactos/ntoskrnl/ldr/loader.c
trunk/reactos/ntoskrnl/mm/section.c
trunk/reactos/ntoskrnl/mm/sysldr.c
Modified: trunk/reactos/ntoskrnl/ldr/loader.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ldr/loader.c?rev=…
==============================================================================
--- trunk/reactos/ntoskrnl/ldr/loader.c (original)
+++ trunk/reactos/ntoskrnl/ldr/loader.c Fri Feb 23 08:39:42 2007
@@ -19,15 +19,6 @@
#include <debug.h>
/* FUNCTIONS *****************************************************************/
-
-NTSTATUS
-NTAPI
-MiResolveImageReferences(IN PVOID ImageBase,
- IN PUNICODE_STRING ImageFileDirectory,
- IN PUNICODE_STRING NamePrefix OPTIONAL,
- OUT PCHAR *MissingApi,
- OUT PWCHAR *MissingDriver,
- OUT PLOAD_IMPORTS *LoadImports);
static LONG
LdrpCompareModuleNames (
@@ -168,372 +159,4 @@
return(STATUS_SUCCESS);
}
-//
-// Used by NtLoadDriver/IoMgr
-//
-NTSTATUS
-NTAPI
-MmLoadSystemImage(IN PUNICODE_STRING FileName,
- IN PUNICODE_STRING NamePrefix OPTIONAL,
- IN PUNICODE_STRING LoadedName OPTIONAL,
- IN ULONG Flags,
- OUT PVOID *ModuleObject,
- OUT PVOID *ImageBaseAddress)
-{
- PVOID ModuleLoadBase;
- NTSTATUS Status;
- HANDLE FileHandle;
- OBJECT_ATTRIBUTES ObjectAttributes;
- PLDR_DATA_TABLE_ENTRY Module;
- FILE_STANDARD_INFORMATION FileStdInfo;
- IO_STATUS_BLOCK IoStatusBlock;
- unsigned int DriverSize, Idx;
- ULONG CurrentSize;
- PVOID DriverBase;
- PIMAGE_DOS_HEADER PEDosHeader;
- PIMAGE_NT_HEADERS PENtHeaders;
- PIMAGE_SECTION_HEADER PESectionHeaders;
- KIRQL Irql;
- PIMAGE_NT_HEADERS NtHeader;
- UNICODE_STRING BaseName, BaseDirectory, PrefixName;
- PLDR_DATA_TABLE_ENTRY LdrEntry;
- ULONG EntrySize;
- PLOAD_IMPORTS LoadedImports = (PVOID)-2;
- PCHAR MissingApiName, Buffer;
- PWCHAR MissingDriverName;
- PAGED_CODE();
-
- /* Detect session-load */
- if (Flags)
- {
- /* Sanity checks */
- ASSERT(NamePrefix == NULL);
- ASSERT(LoadedName == NULL);
-
- /* Make sure the process is in session too */
- if (!PsGetCurrentProcess()->ProcessInSession) return STATUS_NO_MEMORY;
- }
-
- if (ModuleObject) *ModuleObject = NULL;
- if (ImageBaseAddress) *ImageBaseAddress = NULL;
-
- /* Allocate a buffer we'll use for names */
- Buffer = ExAllocatePoolWithTag(NonPagedPool, MAX_PATH, TAG_LDR_WSTR);
- if (!Buffer)
- {
- /* Fail */
- return STATUS_INSUFFICIENT_RESOURCES;
- }
-
- /* Check for a separator */
- if (FileName->Buffer[0] == OBJ_NAME_PATH_SEPARATOR)
- {
- PWCHAR p;
- ULONG BaseLength;
-
- /* Loop the path until we get to the base name */
- p = &FileName->Buffer[FileName->Length / sizeof(WCHAR)];
- while (*(p - 1) != OBJ_NAME_PATH_SEPARATOR) p--;
-
- /* Get the length */
- BaseLength = (ULONG)(&FileName->Buffer[FileName->Length /
sizeof(WCHAR)] - p);
- BaseLength *= sizeof(WCHAR);
-
- /* Setup the string */
- BaseName.Length = (USHORT)BaseLength;
- BaseName.Buffer = p;
- }
- else
- {
- /* Otherwise, we already have a base name */
- BaseName.Length = FileName->Length;
- BaseName.Buffer = FileName->Buffer;
- }
-
- /* Setup the maximum length */
- BaseName.MaximumLength = BaseName.Length;
-
- /* Now compute the base directory */
- BaseDirectory = *FileName;
- BaseDirectory.Length -= BaseName.Length;
- BaseDirectory.MaximumLength = BaseDirectory.Length;
-
- /* And the prefix, which for now is just the name itself */
- PrefixName = *FileName;
-
- /* Check if we have a prefix */
- if (NamePrefix) DPRINT1("Prefixed images are not yet supported!\n");
-
- /* Check if we already have a name, use it instead */
- if (LoadedName) BaseName = *LoadedName;
-
- /* Open the Module */
- InitializeObjectAttributes(&ObjectAttributes,
- FileName,
- OBJ_CASE_INSENSITIVE,
- NULL,
- NULL);
-
- Status = ZwOpenFile(&FileHandle,
- GENERIC_READ,
- &ObjectAttributes,
- &IoStatusBlock,
- FILE_SHARE_READ,
- FILE_SYNCHRONOUS_IO_NONALERT);
-
- if (!NT_SUCCESS(Status))
- {
- DPRINT("Could not open module file: %wZ (Status 0x%08lx)\n", FileName,
Status);
- return(Status);
- }
-
-
- /* Get the size of the file */
- Status = ZwQueryInformationFile(FileHandle,
- &IoStatusBlock,
- &FileStdInfo,
- sizeof(FileStdInfo),
- FileStandardInformation);
- if (!NT_SUCCESS(Status))
- {
- DPRINT("Could not get file size\n");
- NtClose(FileHandle);
- return(Status);
- }
-
-
- /* Allocate nonpageable memory for driver */
- ModuleLoadBase = ExAllocatePoolWithTag(NonPagedPool,
- FileStdInfo.EndOfFile.u.LowPart,
- TAG_DRIVER_MEM);
- if (ModuleLoadBase == NULL)
- {
- DPRINT("Could not allocate memory for module");
- NtClose(FileHandle);
- return(STATUS_INSUFFICIENT_RESOURCES);
- }
-
-
- /* Load driver into memory chunk */
- Status = ZwReadFile(FileHandle,
- 0, 0, 0,
- &IoStatusBlock,
- ModuleLoadBase,
- FileStdInfo.EndOfFile.u.LowPart,
- 0, 0);
- if (!NT_SUCCESS(Status))
- {
- DPRINT("Could not read module file into memory");
- ExFreePool(ModuleLoadBase);
- NtClose(FileHandle);
- return(Status);
- }
-
-
- ZwClose(FileHandle);
-
- DPRINT("Processing PE Module at module base:%08lx\n", ModuleLoadBase);
-
- /* Get header pointers */
- PEDosHeader = (PIMAGE_DOS_HEADER) ModuleLoadBase;
- PENtHeaders = RtlImageNtHeader(ModuleLoadBase);
- NtHeader = PENtHeaders;
- PESectionHeaders = IMAGE_FIRST_SECTION(PENtHeaders);
-
-
- /* Check file magic numbers */
- if (PEDosHeader->e_magic != IMAGE_DOS_SIGNATURE)
- {
- DPRINT("Incorrect MZ magic: %04x\n", PEDosHeader->e_magic);
- return STATUS_UNSUCCESSFUL;
- }
- if (PEDosHeader->e_lfanew == 0)
- {
- DPRINT("Invalid lfanew offset: %08x\n", PEDosHeader->e_lfanew);
- return STATUS_UNSUCCESSFUL;
- }
- if (PENtHeaders->Signature != IMAGE_NT_SIGNATURE)
- {
- DPRINT("Incorrect PE magic: %08x\n", PENtHeaders->Signature);
- return STATUS_UNSUCCESSFUL;
- }
- if (PENtHeaders->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
- {
- DPRINT("Incorrect Architechture: %04x\n",
PENtHeaders->FileHeader.Machine);
- return STATUS_UNSUCCESSFUL;
- }
-
-
- /* FIXME: if image is fixed-address load, then fail */
-
- /* FIXME: check/verify OS version number */
-
- DPRINT("OptionalHdrMagic:%04x LinkVersion:%d.%d\n",
- PENtHeaders->OptionalHeader.Magic,
- PENtHeaders->OptionalHeader.MajorLinkerVersion,
- PENtHeaders->OptionalHeader.MinorLinkerVersion);
- DPRINT("Entry Point:%08lx\n",
PENtHeaders->OptionalHeader.AddressOfEntryPoint);
-
- /* Determine the size of the module */
- DriverSize = 0;
- for (Idx = 0; Idx < PENtHeaders->FileHeader.NumberOfSections; Idx++)
- {
- if (!(PESectionHeaders[Idx].Characteristics & IMAGE_SCN_TYPE_NOLOAD))
- {
- CurrentSize = PESectionHeaders[Idx].VirtualAddress +
PESectionHeaders[Idx].Misc.VirtualSize;
- DriverSize = max(DriverSize, CurrentSize);
- }
- }
- DriverSize = ROUND_UP(DriverSize, PENtHeaders->OptionalHeader.SectionAlignment);
- DPRINT("DriverSize %x, SizeOfImage %x\n",DriverSize,
PENtHeaders->OptionalHeader.SizeOfImage);
-
- /* Allocate a virtual section for the module */
- DriverBase = NULL;
- DriverBase = MmAllocateSection(DriverSize, DriverBase);
- if (DriverBase == 0)
- {
- DPRINT("Failed to allocate a virtual section for driver\n");
- return STATUS_UNSUCCESSFUL;
- }
- DPRINT("DriverBase for %wZ: %x\n", FileName, DriverBase);
-
- /* Copy headers over */
- memcpy(DriverBase, ModuleLoadBase, PENtHeaders->OptionalHeader.SizeOfHeaders);
-
- /* Copy image sections into virtual section */
- for (Idx = 0; Idx < PENtHeaders->FileHeader.NumberOfSections; Idx++)
- {
- CurrentSize = PESectionHeaders[Idx].VirtualAddress +
PESectionHeaders[Idx].Misc.VirtualSize;
- /* Copy current section into current offset of virtual section */
- if (CurrentSize <= DriverSize &&
- PESectionHeaders[Idx].SizeOfRawData)
- {
- DPRINT("PESectionHeaders[Idx].VirtualAddress + DriverBase %x\n",
- PESectionHeaders[Idx].VirtualAddress + (ULONG_PTR)DriverBase);
- memcpy((PVOID)((ULONG_PTR)DriverBase +
PESectionHeaders[Idx].VirtualAddress),
- (PVOID)((ULONG_PTR)ModuleLoadBase +
PESectionHeaders[Idx].PointerToRawData),
- PESectionHeaders[Idx].Misc.VirtualSize >
PESectionHeaders[Idx].SizeOfRawData
- ? PESectionHeaders[Idx].SizeOfRawData :
PESectionHeaders[Idx].Misc.VirtualSize );
- }
- }
-
- /* Relocate the driver */
- Status = LdrRelocateImageWithBias(DriverBase,
- 0,
- "SYSLDR",
- STATUS_SUCCESS,
- STATUS_CONFLICTING_ADDRESSES,
- STATUS_INVALID_IMAGE_FORMAT);
- if (!NT_SUCCESS(Status))
- {
- /* Fail */
- return Status;
- }
-
- /* Calculate the size we'll need for the entry and allocate it */
- EntrySize = sizeof(LDR_DATA_TABLE_ENTRY) +
- BaseName.Length +
- sizeof(UNICODE_NULL);
-
- /* Allocate the entry */
- LdrEntry = ExAllocatePoolWithTag(NonPagedPool, EntrySize, TAG_MODULE_OBJECT);
- if (!LdrEntry)
- {
- /* Fail */
- return STATUS_INSUFFICIENT_RESOURCES;
- }
-
- /* Setup the entry */
- LdrEntry->Flags = LDRP_LOAD_IN_PROGRESS;
- LdrEntry->LoadCount = 1;
- LdrEntry->LoadedImports = LoadedImports;
- LdrEntry->PatchInformation = NULL;
-
- /* Check the version */
- if ((NtHeader->OptionalHeader.MajorOperatingSystemVersion >= 5) &&
- (NtHeader->OptionalHeader.MajorImageVersion >= 5))
- {
- /* Mark this image as a native image */
- LdrEntry->Flags |= 0x80000000;
- }
-
- /* Setup the rest of the entry */
- LdrEntry->DllBase = DriverBase;
- LdrEntry->EntryPoint = (PVOID)((ULONG_PTR)DriverBase +
- NtHeader->OptionalHeader.AddressOfEntryPoint);
- LdrEntry->SizeOfImage = DriverSize;
- LdrEntry->CheckSum = NtHeader->OptionalHeader.CheckSum;
- LdrEntry->SectionPointer = LdrEntry;
-
- /* Now write the DLL name */
- LdrEntry->BaseDllName.Buffer = (PVOID)(LdrEntry + 1);
- LdrEntry->BaseDllName.Length = BaseName.Length;
- LdrEntry->BaseDllName.MaximumLength = BaseName.Length;
-
- /* Copy and null-terminate it */
- RtlCopyMemory(LdrEntry->BaseDllName.Buffer,
- BaseName.Buffer,
- BaseName.Length);
- LdrEntry->BaseDllName.Buffer[BaseName.Length / 2] = UNICODE_NULL;
-
- /* Now allocate the full name */
- LdrEntry->FullDllName.Buffer = ExAllocatePoolWithTag(PagedPool,
- PrefixName.Length +
- sizeof(UNICODE_NULL),
- TAG_LDR_WSTR);
- if (!LdrEntry->FullDllName.Buffer)
- {
- /* Don't fail, just set it to zero */
- LdrEntry->FullDllName.Length = 0;
- LdrEntry->FullDllName.MaximumLength = 0;
- }
- else
- {
- /* Set it up */
- LdrEntry->FullDllName.Length = PrefixName.Length;
- LdrEntry->FullDllName.MaximumLength = PrefixName.Length;
-
- /* Copy and null-terminate */
- RtlCopyMemory(LdrEntry->FullDllName.Buffer,
- PrefixName.Buffer,
- PrefixName.Length);
- LdrEntry->FullDllName.Buffer[PrefixName.Length / 2] = UNICODE_NULL;
- }
-
- /* Insert the entry */
- KeAcquireSpinLock(&PsLoadedModuleSpinLock, &Irql);
- InsertTailList(&PsLoadedModuleList, &LdrEntry->InLoadOrderLinks);
- KeReleaseSpinLock(&PsLoadedModuleSpinLock, Irql);
-
- /* Resolve imports */
- MissingApiName = Buffer;
- Status = MiResolveImageReferences(DriverBase,
- &BaseDirectory,
- NULL,
- &MissingApiName,
- &MissingDriverName,
- &LoadedImports);
- if (!NT_SUCCESS(Status))
- {
- /* Fail */
- ExFreePool(LdrEntry->FullDllName.Buffer);
- ExFreePool(LdrEntry);
- return Status;
- }
-
- /* Return */
- Module = LdrEntry;
-
- /* Cleanup */
- ExFreePool(ModuleLoadBase);
-
- if (ModuleObject) *ModuleObject = Module;
- if (ImageBaseAddress) *ImageBaseAddress = Module->DllBase;
-
- /* Hook for KDB on loading a driver. */
- KDB_LOADDRIVER_HOOK(FileName, Module);
-
- return(STATUS_SUCCESS);
-}
-
/* EOF */
Modified: trunk/reactos/ntoskrnl/mm/section.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/section.c?rev=…
==============================================================================
--- trunk/reactos/ntoskrnl/mm/section.c (original)
+++ trunk/reactos/ntoskrnl/mm/section.c Fri Feb 23 08:39:42 2007
@@ -3292,7 +3292,7 @@
Status = ObReferenceObjectByHandle(FileHandle,
FileAccess,
IoFileObjectType,
- UserMode,
+ ExGetPreviousMode(),
(PVOID*)(PVOID)&FileObject,
NULL);
Modified: trunk/reactos/ntoskrnl/mm/sysldr.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/sysldr.c?rev=2…
==============================================================================
--- trunk/reactos/ntoskrnl/mm/sysldr.c (original)
+++ trunk/reactos/ntoskrnl/mm/sysldr.c Fri Feb 23 08:39:42 2007
@@ -20,6 +20,24 @@
KMUTANT MmSystemLoadLock;
/* FUNCTIONS *****************************************************************/
+
+VOID
+NTAPI
+MiProcessLoaderEntry(IN PLDR_DATA_TABLE_ENTRY LdrEntry,
+ IN BOOLEAN Insert)
+{
+ KIRQL OldIrql;
+
+ /* Acquire the lock */
+ KeAcquireSpinLock(&PsLoadedModuleSpinLock, &OldIrql);
+
+ /* Insert or remove from the list */
+ Insert ? InsertTailList(&PsLoadedModuleList, &LdrEntry->InLoadOrderLinks)
:
+ RemoveEntryList(&LdrEntry->InLoadOrderLinks);
+
+ /* Release the lock */
+ KeReleaseSpinLock(&PsLoadedModuleSpinLock, OldIrql);
+}
VOID
NTAPI
@@ -1019,3 +1037,469 @@
ZwClose(SectionHandle);
return Status;
}
+
+NTSTATUS
+NTAPI
+MmLoadSystemImage(IN PUNICODE_STRING FileName,
+ IN PUNICODE_STRING NamePrefix OPTIONAL,
+ IN PUNICODE_STRING LoadedName OPTIONAL,
+ IN ULONG Flags,
+ OUT PVOID *ModuleObject,
+ OUT PVOID *ImageBaseAddress)
+{
+ PVOID ModuleLoadBase = NULL;
+ NTSTATUS Status;
+ HANDLE FileHandle = NULL;
+ OBJECT_ATTRIBUTES ObjectAttributes;
+ FILE_STANDARD_INFORMATION FileStdInfo;
+ IO_STATUS_BLOCK IoStatusBlock;
+ ULONG DriverSize = 0, Size, i;
+ PVOID DriverBase;
+ PIMAGE_SECTION_HEADER SectionHeaders;
+ PIMAGE_NT_HEADERS NtHeader;
+ UNICODE_STRING BaseName, BaseDirectory, PrefixName;
+ PLDR_DATA_TABLE_ENTRY LdrEntry = NULL;
+ ULONG EntrySize;
+ PLOAD_IMPORTS LoadedImports = (PVOID)-2;
+ PCHAR MissingApiName, Buffer;
+ PWCHAR MissingDriverName;
+ HANDLE SectionHandle;
+ ACCESS_MASK DesiredAccess;
+ PVOID Section = NULL;
+ BOOLEAN LockOwned = FALSE;
+ PLIST_ENTRY NextEntry;
+ PAGED_CODE();
+
+ /* Detect session-load */
+ if (Flags)
+ {
+ /* Sanity checks */
+ ASSERT(NamePrefix == NULL);
+ ASSERT(LoadedName == NULL);
+
+ /* Make sure the process is in session too */
+ if (!PsGetCurrentProcess()->ProcessInSession) return STATUS_NO_MEMORY;
+ }
+
+ if (ModuleObject) *ModuleObject = NULL;
+ if (ImageBaseAddress) *ImageBaseAddress = NULL;
+
+ /* Allocate a buffer we'll use for names */
+ Buffer = ExAllocatePoolWithTag(NonPagedPool, MAX_PATH, TAG_LDR_WSTR);
+ if (!Buffer) return STATUS_INSUFFICIENT_RESOURCES;
+
+ /* Check for a separator */
+ if (FileName->Buffer[0] == OBJ_NAME_PATH_SEPARATOR)
+ {
+ PWCHAR p;
+ ULONG BaseLength;
+
+ /* Loop the path until we get to the base name */
+ p = &FileName->Buffer[FileName->Length / sizeof(WCHAR)];
+ while (*(p - 1) != OBJ_NAME_PATH_SEPARATOR) p--;
+
+ /* Get the length */
+ BaseLength = (ULONG)(&FileName->Buffer[FileName->Length /
sizeof(WCHAR)] - p);
+ BaseLength *= sizeof(WCHAR);
+
+ /* Setup the string */
+ BaseName.Length = (USHORT)BaseLength;
+ BaseName.Buffer = p;
+ }
+ else
+ {
+ /* Otherwise, we already have a base name */
+ BaseName.Length = FileName->Length;
+ BaseName.Buffer = FileName->Buffer;
+ }
+
+ /* Setup the maximum length */
+ BaseName.MaximumLength = BaseName.Length;
+
+ /* Now compute the base directory */
+ BaseDirectory = *FileName;
+ BaseDirectory.Length -= BaseName.Length;
+ BaseDirectory.MaximumLength = BaseDirectory.Length;
+
+ /* And the prefix, which for now is just the name itself */
+ PrefixName = *FileName;
+
+ /* Check if we have a prefix */
+ if (NamePrefix) DPRINT1("Prefixed images are not yet supported!\n");
+
+ /* Check if we already have a name, use it instead */
+ if (LoadedName) BaseName = *LoadedName;
+
+ /* Acquire the load lock */
+LoaderScan:
+ ASSERT(LockOwned == FALSE);
+ LockOwned = TRUE;
+ KeEnterCriticalRegion();
+ KeWaitForSingleObject(&MmSystemLoadLock,
+ WrVirtualMemory,
+ KernelMode,
+ FALSE,
+ NULL);
+
+ /* Scan the module list */
+ NextEntry = PsLoadedModuleList.Flink;
+ while (NextEntry != &PsLoadedModuleList)
+ {
+ /* Get the entry and compare the names */
+ LdrEntry = CONTAINING_RECORD(NextEntry,
+ LDR_DATA_TABLE_ENTRY,
+ InLoadOrderLinks);
+ if (RtlEqualUnicodeString(&PrefixName, &LdrEntry->FullDllName, TRUE))
+ {
+ /* Found it, break out */
+ break;
+ }
+
+ /* Keep scanning */
+ NextEntry = NextEntry->Flink;
+ }
+
+ /* Check if we found the image */
+ if (NextEntry != &PsLoadedModuleList)
+ {
+ /* Check if we had already mapped a section */
+ if (Section)
+ {
+ /* Dereference and clear */
+ ObDereferenceObject(Section);
+ Section = NULL;
+ }
+
+ /* Check if this was supposed to be a session load */
+ if (!Flags)
+ {
+ /* It wasn't, so just return the data */
+ *ModuleObject = LdrEntry;
+ *ImageBaseAddress = LdrEntry->DllBase;
+ Status = STATUS_IMAGE_ALREADY_LOADED;
+ }
+ else
+ {
+ /* We don't support session loading yet */
+ DPRINT1("Unsupported Session-Load!\n");
+ while (TRUE);
+ }
+
+ /* Do cleanup */
+ goto Quickie;
+ }
+ else if (!Section)
+ {
+ /* It wasn't loaded, and we didn't have a previous attempt */
+ KeReleaseMutant(&MmSystemLoadLock, 1, FALSE, FALSE);
+ KeLeaveCriticalRegion();
+ LockOwned = FALSE;
+
+ /* Check if KD is enabled */
+ if ((KdDebuggerEnabled) && !(KdDebuggerNotPresent))
+ {
+ /* FIXME: Attempt to get image from KD */
+ }
+
+ /* We don't have a valid entry */
+ LdrEntry = NULL;
+
+ /* Setup image attributes */
+ InitializeObjectAttributes(&ObjectAttributes,
+ FileName,
+ OBJ_CASE_INSENSITIVE,
+ NULL,
+ NULL);
+
+ /* Open the image */
+ Status = ZwOpenFile(&FileHandle,
+ FILE_EXECUTE,
+ &ObjectAttributes,
+ &IoStatusBlock,
+ FILE_SHARE_READ | FILE_SHARE_DELETE,
+ FILE_SYNCHRONOUS_IO_NONALERT);
+ if (!NT_SUCCESS(Status)) goto Quickie;
+
+ /* Validate it */
+ Status = MmCheckSystemImage(FileHandle, FALSE);
+ if ((Status == STATUS_IMAGE_CHECKSUM_MISMATCH) ||
+ (Status == STATUS_IMAGE_MP_UP_MISMATCH) ||
+ (Status == STATUS_INVALID_IMAGE_FORMAT))
+ {
+ /* Fail loading */
+ goto Quickie;
+ }
+
+ /* Get image size */
+ Status = ZwQueryInformationFile(FileHandle,
+ &IoStatusBlock,
+ &FileStdInfo,
+ sizeof(FileStdInfo),
+ FileStandardInformation);
+ if (!NT_SUCCESS(Status)) goto Quickie;
+
+ /* Allocate memory for image */
+ ModuleLoadBase = ExAllocatePoolWithTag(NonPagedPool,
+ FileStdInfo.EndOfFile.u.LowPart,
+ TAG_DRIVER_MEM);
+
+ /* Read the image */
+ Status = ZwReadFile(FileHandle,
+ 0,
+ 0,
+ 0,
+ &IoStatusBlock,
+ ModuleLoadBase,
+ FileStdInfo.EndOfFile.u.LowPart,
+ 0,
+ 0);
+ if (!NT_SUCCESS(Status)) goto Quickie;
+
+ /* Check if this is a session-load */
+ if (Flags)
+ {
+ /* Then we only need read and execute */
+ DesiredAccess = SECTION_MAP_READ | SECTION_MAP_EXECUTE;
+ }
+ else
+ {
+ /* Otherwise, we can allow write access */
+ DesiredAccess = SECTION_ALL_ACCESS;
+ }
+
+ /* Initialize the attributes for the section */
+ InitializeObjectAttributes(&ObjectAttributes,
+ NULL,
+ OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
+ NULL,
+ NULL);
+
+ /* Create the section */
+ Status = ZwCreateSection(&SectionHandle,
+ DesiredAccess,
+ &ObjectAttributes,
+ NULL,
+ PAGE_EXECUTE,
+ SEC_IMAGE,
+ FileHandle);
+ if (!NT_SUCCESS(Status)) goto Quickie;
+
+ /* Now get the section pointer */
+ Status = ObReferenceObjectByHandle(SectionHandle,
+ SECTION_MAP_EXECUTE,
+ MmSectionObjectType,
+ KernelMode,
+ &Section,
+ NULL);
+ ZwClose(SectionHandle);
+ if (!NT_SUCCESS(Status)) goto Quickie;
+
+ /* Check if this was supposed to be a session-load */
+ if (Flags)
+ {
+ /* We don't support session loading yet */
+ DPRINT1("Unsupported Session-Load!\n");
+ while (TRUE);
+ }
+
+ /* Check the loader list again, we should end up in the path below */
+ goto LoaderScan;
+ }
+ else
+ {
+ /* We don't have a valid entry */
+ LdrEntry = NULL;
+ }
+
+ /* We should have a valid module base */
+ ASSERT(ModuleLoadBase != NULL);
+
+ /* Get header pointers */
+ NtHeader = RtlImageNtHeader(ModuleLoadBase);
+
+ /* Get header pointers */
+ SectionHeaders = IMAGE_FIRST_SECTION(NtHeader);
+
+ /* Determine the size of the module */
+ for (i = 0; i < NtHeader->FileHeader.NumberOfSections; i++)
+ {
+ /* Skip this section if we're not supposed to load it */
+ if (!(SectionHeaders[i].Characteristics & IMAGE_SCN_TYPE_NOLOAD))
+ {
+ /* Add the size of this section into the total size */
+ Size = SectionHeaders[i].VirtualAddress +
+ SectionHeaders[i].Misc.VirtualSize;
+ DriverSize = max(DriverSize, Size);
+ }
+ }
+
+ /* Round up the driver size to section alignment */
+ DriverSize = ROUND_UP(DriverSize, NtHeader->OptionalHeader.SectionAlignment);
+
+ /* Allocate a virtual section for the module */
+ DriverBase = MmAllocateSection(DriverSize, NULL);
+
+ /* Copy headers over */
+ RtlCopyMemory(DriverBase,
+ ModuleLoadBase,
+ NtHeader->OptionalHeader.SizeOfHeaders);
+
+ /* Copy image sections into virtual section */
+ for (i = 0; i < NtHeader->FileHeader.NumberOfSections; i++)
+ {
+ /* Get the size of this section and check if it's valid and on-disk */
+ Size = SectionHeaders[i].VirtualAddress +
+ SectionHeaders[i].Misc.VirtualSize;
+ if ((Size <= DriverSize) && (SectionHeaders[i].SizeOfRawData))
+ {
+ /* Copy the data from the disk to the image */
+ RtlCopyMemory((PVOID)((ULONG_PTR)DriverBase +
+ SectionHeaders[i].VirtualAddress),
+ (PVOID)((ULONG_PTR)ModuleLoadBase +
+ SectionHeaders[i].PointerToRawData),
+ SectionHeaders[i].Misc.VirtualSize >
+ SectionHeaders[i].SizeOfRawData ?
+ SectionHeaders[i].SizeOfRawData :
+ SectionHeaders[i].Misc.VirtualSize);
+ }
+ }
+
+ /* Relocate the driver */
+ Status = LdrRelocateImageWithBias(DriverBase,
+ 0,
+ "SYSLDR",
+ STATUS_SUCCESS,
+ STATUS_CONFLICTING_ADDRESSES,
+ STATUS_INVALID_IMAGE_FORMAT);
+ if (!NT_SUCCESS(Status)) goto Quickie;
+
+ /* Calculate the size we'll need for the entry and allocate it */
+ EntrySize = sizeof(LDR_DATA_TABLE_ENTRY) +
+ BaseName.Length +
+ sizeof(UNICODE_NULL);
+
+ /* Allocate the entry */
+ LdrEntry = ExAllocatePoolWithTag(NonPagedPool, EntrySize, TAG_MODULE_OBJECT);
+ if (!LdrEntry)
+ {
+ /* Fail */
+ Status = STATUS_INSUFFICIENT_RESOURCES;
+ goto Quickie;
+ }
+
+ /* Setup the entry */
+ LdrEntry->Flags = LDRP_LOAD_IN_PROGRESS;
+ LdrEntry->LoadCount = 1;
+ LdrEntry->LoadedImports = LoadedImports;
+ LdrEntry->PatchInformation = NULL;
+
+ /* Check the version */
+ if ((NtHeader->OptionalHeader.MajorOperatingSystemVersion >= 5) &&
+ (NtHeader->OptionalHeader.MajorImageVersion >= 5))
+ {
+ /* Mark this image as a native image */
+ LdrEntry->Flags |= 0x80000000;
+ }
+
+ /* Setup the rest of the entry */
+ LdrEntry->DllBase = DriverBase;
+ LdrEntry->EntryPoint = (PVOID)((ULONG_PTR)DriverBase +
+ NtHeader->OptionalHeader.AddressOfEntryPoint);
+ LdrEntry->SizeOfImage = DriverSize;
+ LdrEntry->CheckSum = NtHeader->OptionalHeader.CheckSum;
+ LdrEntry->SectionPointer = LdrEntry;
+
+ /* Now write the DLL name */
+ LdrEntry->BaseDllName.Buffer = (PVOID)(LdrEntry + 1);
+ LdrEntry->BaseDllName.Length = BaseName.Length;
+ LdrEntry->BaseDllName.MaximumLength = BaseName.Length;
+
+ /* Copy and null-terminate it */
+ RtlCopyMemory(LdrEntry->BaseDllName.Buffer,
+ BaseName.Buffer,
+ BaseName.Length);
+ LdrEntry->BaseDllName.Buffer[BaseName.Length / 2] = UNICODE_NULL;
+
+ /* Now allocate the full name */
+ LdrEntry->FullDllName.Buffer = ExAllocatePoolWithTag(PagedPool,
+ PrefixName.Length +
+ sizeof(UNICODE_NULL),
+ TAG_LDR_WSTR);
+ if (!LdrEntry->FullDllName.Buffer)
+ {
+ /* Don't fail, just set it to zero */
+ LdrEntry->FullDllName.Length = 0;
+ LdrEntry->FullDllName.MaximumLength = 0;
+ }
+ else
+ {
+ /* Set it up */
+ LdrEntry->FullDllName.Length = PrefixName.Length;
+ LdrEntry->FullDllName.MaximumLength = PrefixName.Length;
+
+ /* Copy and null-terminate */
+ RtlCopyMemory(LdrEntry->FullDllName.Buffer,
+ PrefixName.Buffer,
+ PrefixName.Length);
+ LdrEntry->FullDllName.Buffer[PrefixName.Length / 2] = UNICODE_NULL;
+ }
+
+ /* Add the entry */
+ MiProcessLoaderEntry(LdrEntry, TRUE);
+
+ /* Resolve imports */
+ MissingApiName = Buffer;
+ Status = MiResolveImageReferences(DriverBase,
+ &BaseDirectory,
+ NULL,
+ &MissingApiName,
+ &MissingDriverName,
+ &LoadedImports);
+ if (!NT_SUCCESS(Status))
+ {
+ /* Fail */
+ MiProcessLoaderEntry(LdrEntry, FALSE);
+
+ /* Check if we need to free the name */
+ if (LdrEntry->FullDllName.Buffer)
+ {
+ /* Free it */
+ ExFreePool(LdrEntry->FullDllName.Buffer);
+ }
+
+ /* Free the entry itself */
+ ExFreePool(LdrEntry);
+ LdrEntry = NULL;
+ goto Quickie;
+ }
+
+ if (ModuleObject) *ModuleObject = LdrEntry;
+ if (ImageBaseAddress) *ImageBaseAddress = LdrEntry->DllBase;
+
+ /* Hook for KDB on loading a driver. */
+ KDB_LOADDRIVER_HOOK(FileName, LdrEntry);
+
+Quickie:
+ /* If we have a file handle, close it */
+ if (FileHandle) ZwClose(FileHandle);
+
+ /* Cleanup */
+ if (ModuleLoadBase) ExFreePool(ModuleLoadBase);
+
+ /* Check if we have the lock acquired */
+ if (LockOwned)
+ {
+ /* Release the lock */
+ KeReleaseMutant(&MmSystemLoadLock, 1, FALSE, FALSE);
+ KeLeaveCriticalRegion();
+ LockOwned = FALSE;
+ }
+
+ /* Check if we had a prefix */
+ if (NamePrefix) ExFreePool(PrefixName.Buffer);
+
+ /* Free the name buffer and return status */
+ ExFreePool(Buffer);
+ return Status;
+}
+
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