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more hacking on the loader

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svn path=/trunk/; revision=120
This commit is contained in:
Rex Jolliff 1998-12-12 17:44:30 +00:00
parent f5d7376e5a
commit 0d71cd85bd
2 changed files with 139 additions and 92 deletions
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228
reactos/ntoskrnl/ldr/loader.c
View file

@ -7,6 +7,7 @@
* UPDATE HISTORY:
* DW 22/05/98 Created
* RJJ 10/12/98 Completed loader function and added hooks for MZ/PE
* RJJ 10/12/98 Rolled in David's code to load COFF drivers
*/
/* INCLUDES *****************************************************************/
@ -26,9 +27,13 @@
#include "pe.h"
/* FUNCTIONS *****************************************************************/
/* FORWARD DECLARATIONS ******************************************************/
NTSTATUS LdrCOFFProcessDriver(PVOID ModuleLoadBase);
NTSTATUS LdrPEProcessDriver(PVOID ModuleLoadBase);
/* COFF Driver load support **************************************************/
static BOOLEAN LdrCOFFDoRelocations(module *Module, unsigned int SectionIndex);
static BOOLEAN LdrCOFFDoAddr32Reloc(module *Module, SCNHDR *Section, RELOC *Relocation);
static BOOLEAN LdrCOFFDoReloc32Reloc(module *Module, SCNHDR *Section, RELOC *Relocation);
@ -37,22 +42,49 @@ static unsigned int LdrCOFFGetSymbolValue(module *Module, unsigned int Idx);
static unsigned int LdrCOFFGetKernelSymbolAddr(char *Name);
static unsigned int LdrCOFFGetSymbolValueByName(module *Module, char *SymbolName, unsigned int Idx);
static NTSTATUS
LdrCOFFProcessDriver(HANDLE FileHandle)
{
BOOLEAN FoundEntry;
char SymbolName[255];
int i;
NTSTATUS Status;
PVOID ModuleLoadBase;
ULONG EntryOffset;
FILHDR *FileHeader;
AOUTHDR *AOUTHeader;
module *Module;
FILE_STANDARD_INFORMATION FileStdInfo;
PDRIVER_INITIALIZE EntryRoutine;
/* FUNCTIONS *****************************************************************/
/* Get the size of the file for the section */
/*
* FUNCTION: Loads a kernel driver
* ARGUMENTS:
* FileName = Driver to load
* RETURNS: Status
*/
NTSTATUS
LdrLoadDriver(PUNICODE_STRING Filename)
{
char BlockBuffer[512];
PVOID ModuleLoadBase;
NTSTATUS Status;
HANDLE FileHandle;
OBJECT_ATTRIBUTES FileObjectAttributes;
PIMAGE_DOS_HEADER PEDosHeader;
FILE_STANDARD_INFORMATION FileStdInfo;
/* Open the Driver */
InitializeObjectAttributes(&FileObjectAttributes,
Filename,
0,
NULL,
NULL);
Status = ZwOpenFile(&FileHandle, 0, &FileObjectAttributes, NULL, 0, 0);
if (!NT_SUCCESS(Status))
{
return Status;
}
CHECKPOINT;
/* Read first block of image to determine type */
Status = ZwReadFile(FileHandle, 0, 0, 0, 0, BlockBuffer, 512, 0, 0);
if (!NT_SUCCESS(Status))
{
ZwClose(FileHandle);
return Status;
}
CHECKPOINT;
/* Get the size of the file */
Status = ZwQueryInformationFile(FileHandle,
NULL,
&FileStdInfo,
@ -86,6 +118,83 @@ LdrCOFFProcessDriver(HANDLE FileHandle)
}
CHECKPOINT;
ZwClose(FileHandle);
/* If MZ header exists */
PEDosHeader = (PIMAGE_DOS_HEADER) ModuleLoadBase;
if (PEDosHeader->e_magic == IMAGE_DOS_MAGIC && PEDosHeader->e_lfanew != 0L)
{
Status = LdrPEProcessDriver(ModuleLoadBase);
if (!NT_SUCCESS(Status))
{
ExFreePool(ModuleLoadBase);
return Status;
}
}
if (PEDosHeader->e_magic == IMAGE_DOS_MAGIC)
{
ExFreePool(ModuleLoadBase);
return STATUS_NOT_IMPLEMENTED;
}
else /* Assume COFF format and load */
{
Status = LdrCOFFProcessDriver(ModuleLoadBase);
if (!NT_SUCCESS(Status))
{
ExFreePool(ModuleLoadBase);
return Status;
}
}
/* Cleanup */
ExFreePool(ModuleLoadBase);
return STATUS_SUCCESS;
}
NTSTATUS
LdrPEProcessDriver(PVOID ModuleLoadBase)
{
PULONG NTMagic;
PIMAGE_DOS_HEADER PEDosHeader;
PIMAGE_FILE_HEADER PEFileHeader;
PIMAGE_OPTIONAL_HEADER PEOptionalHeader;
/* Get header pointers */
PEDosHeader = (PIMAGE_DOS_HEADER) ModuleLoadBase;
PEMagic = (PULONG) ((unsigned int) ModuleLoadBase +
PEDosHeader->e_lfanew);
PEFileHeader = (PIMAGE_FILE_HEADER) ((unsigned int) ModuleLoadBase +
PEDosHeader->e_lfanew + sizeof(ULONG));
PEOptionalHeader = (PIMAGE_OPTIONAL_HEADER) ((unsigned int) ModuleLoadBase +
PEDosHeader->e_lfanew + sizeof(ULONG) + sizeof(IMAGE_FILE_HEADER));
/* Check file magic numbers */
if (PEDosHeader->e_magic != IMAGE_DOS_MAGIC ||
PEDosHeader->e_lfanew == 0 ||
*PEMagic != IMAGE_NT_MAGIC ||
PEFileHeader->Machine != IMAGE_FILE_MACHINE_I386)
{
return STATUS_UNSUCCESSFUL;
}
return STATUS_NOT_IMPLEMENTED;
}
NTSTATUS
LdrCOFFProcessDriver(PVOID ModuleLoadBase)
{
BOOLEAN FoundEntry;
char SymbolName[255];
int i;
ULONG EntryOffset;
FILHDR *FileHeader;
AOUTHDR *AOUTHeader;
module *Module;
PDRIVER_INITIALIZE EntryRoutine;
/* Get header pointers */
FileHeader = ModuleLoadBase;
AOUTHeader = ModuleLoadBase + FILHSZ;
@ -96,7 +205,6 @@ LdrCOFFProcessDriver(HANDLE FileHandle)
{
DbgPrint("Module has bad magic value (%x)\n",
FileHeader->f_magic);
ExFreePool(ModuleLoadBase);
return STATUS_UNSUCCESSFUL;
}
CHECKPOINT;
@ -105,7 +213,6 @@ LdrCOFFProcessDriver(HANDLE FileHandle)
Module = (module *) ExAllocatePool(NonPagedPool, sizeof(module));
if (Module == NULL)
{
ExFreePool(ModuleLoadBase);
return STATUS_INSUFFICIENT_RESOURCES;
}
Module->sym_list = (SYMENT *)(ModuleLoadBase + FileHeader->f_symptr);
@ -153,7 +260,6 @@ LdrCOFFProcessDriver(HANDLE FileHandle)
{
DbgPrint("Failed to alloc section for module\n");
ExFreePool(Module);
ExFreePool(ModuleLoadBase);
return STATUS_INSUFFICIENT_RESOURCES;
}
CHECKPOINT;
@ -176,8 +282,11 @@ LdrCOFFProcessDriver(HANDLE FileHandle)
{
DPRINT("Relocation failed for section %s\n",
Module->scn_list[i].s_name);
/* FIXME: unallocate all sections here */
ExFreePool(Module);
ExFreePool(ModuleLoadBase);
return STATUS_UNSUCCESSFUL;
}
}
@ -208,13 +317,18 @@ LdrCOFFProcessDriver(HANDLE FileHandle)
{
DbgPrint("No module entry point defined\n");
ExFreePool(Module);
ExFreePool(ModuleLoadBase);
/* FIXME: unallocate all sections here */
return STATUS_UNSUCCESSFUL;
}
/* Call the module initalization routine */
/* Get the address of the module initalization routine */
EntryRoutine = (PDRIVER_INITIALIZE)(Module->base + EntryOffset);
/* Cleanup */
ExFreePool(Module);
return InitalizeLoadedDriver(EntryRoutine);
}
@ -457,76 +571,6 @@ LdrCOFFGetSymbolValueByName(module *Module,
static NTSTATUS
LdrProcessPEDriver(HANDLE FileHandle, PIMAGE_DOS_HEADER DosHeader)
{
return STATUS_NOT_IMPLEMENTED;
}
NTSTATUS
LdrLoadDriver(PUNICODE_STRING Filename)
/*
* FUNCTION: Loads a kernel driver
* ARGUMENTS:
* FileName = Driver to load
* RETURNS: Status
*/
{
char BlockBuffer[512];
NTSTATUS Status;
HANDLE FileHandle;
OBJECT_ATTRIBUTES FileObjectAttributes;
PIMAGE_DOS_HEADER PEDosHeader;
/* Open the Driver */
InitializeObjectAttributes(&FileObjectAttributes,
Filename,
0,
NULL,
NULL);
Status = ZwOpenFile(&FileHandle, 0, &FileObjectAttributes, NULL, 0, 0);
if (!NT_SUCCESS(Status))
{
return Status;
}
/* Read first block of image to determine type */
Status = ZwReadFile(FileHandle, 0, 0, 0, 0, BlockBuffer, 512, 0, 0);
if (!NT_SUCCESS(Status))
{
ZwClose(FileHandle);
return Status;
}
/* If MZ header exists */
PEDosHeader = (PIMAGE_DOS_HEADER) BlockBuffer;
if (PEDosHeader->e_magic == 0x54AD && PEDosHeader->e_lfanew != 0L)
{
Status = LdrProcessPEDriver(FileHandle, PEDosHeader);
if (!NT_SUCCESS(Status))
{
ZwClose(FileHandle);
return Status;
}
}
if (PEDosHeader->e_magic == 0x54AD)
{
ZwClose(FileHandle);
return STATUS_NOT_IMPLEMENTED;
}
else /* Assume coff format and load */
{
Status = LdrCOFFProcessDriver(FileHandle);
if (!NT_SUCCESS(Status))
{
ZwClose(FileHandle);
return Status;
}
}
return STATUS_NOT_IMPLEMENTED;
}
static NTSTATUS
LdrProcessMZImage(HANDLE ProcessHandle,
HANDLE FileHandle,

3
reactos/ntoskrnl/ldr/pe.h
View file

@ -7,6 +7,9 @@ typedef WORD *PWORD;
typedef DWORD *PDWORD;
#endif
#define IMAGE_DOS_MAGIC 0x54ad
#define IMAGE_NT_MAGIC 0x00004550
typedef struct _IMAGE_DOS_HEADER { // DOS .EXE header
WORD e_magic; // Magic number
WORD e_cblp; // Bytes on last page of file