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2002-08-10 David Welch <welch@computer2.darkstar.org>

Browse source 
* ntoskrnl/mm/i386/page.c (MmSetPageProtect): Fixed
	behaviour when called on the system address space.

2002-08-10  David Welch  <welch@computer2.darkstar.org>

	* ntoskrnl/mm/virtual.c (MmQueryAnonMem, MmProtectAnonMem,
	NtAllocateVirtualMemory, NtFreeVirtualMemory): Renamed
	segments to regions; moved region code to seperate file.
	Implemented NtQueryVirtualMemory and NtProtectVirtualMemory
	for anonymous memory areas.

2002-08-10  David Welch  <welch@computer2.darkstar.org>

	* ntoskrnl/mm/anonmem.c: Moved functions relating to
	areas created with NtAllocateVirtualMemory to a
	seperate file.

2002-08-10  David Welch  <welch@computer2.darkstar.org>

	* ntoskrnl/mm/section.c (MmQuerySectionView): Implemented
	NtQueryVirtualMemory for section views.

2002-08-10  David Welch  <welch@computer2.darkstar.org>

	* ntoskrnl/mm/section.c (MmAccessFaultSectionView,
	MmNotPresentFaultSectionView, MmProtectSectionView,
	MmMapViewOfSegment, MmAlterViewAttributes): Implemented
	NtProtectVirtualMemory for section views.

2002-08-10  David Welch  <welch@computer2.darkstar.org>

	* ntoskrnl/ke/main.c: Removed SEH test code.

2002-08-10  David Welch  <welch@computer2.darkstar.org>

	* lib/ntdll/ldr/utils.c (LdrFixupImports): Remove the readonly
	protection from the IAT before writing to it.

2002-08-10  David Welch  <welch@computer2.darkstar.org>

	* lib/ntdll/ldr/utils.c (LdrAdjustDllName): Properly null terminate
	the base name of the DLL.

2002-08-10  David Welch  <welch@computer2.darkstar.org>

	* ntoskrnl/ldr/loader.c (LdrPEProcessModule): Set the text segment
	of modules to readonly after loading.

svn path=/trunk/; revision=3327
This commit is contained in:
David Welch 2002-08-10 16:41:20 +00:00
parent 6809339d27
commit 383eddd11e
16 changed files with 1670 additions and 1646 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

50
reactos/ChangeLog
View file

@ -1,3 +1,53 @@
2002-08-10 David Welch <welch@computer2.darkstar.org>
* ntoskrnl/mm/i386/page.c (MmSetPageProtect): Fixed
behaviour when called on the system address space.
2002-08-10 David Welch <welch@computer2.darkstar.org>
* ntoskrnl/mm/virtual.c (MmQueryAnonMem, MmProtectAnonMem,
NtAllocateVirtualMemory, NtFreeVirtualMemory): Renamed
segments to regions; moved region code to seperate file.
Implemented NtQueryVirtualMemory and NtProtectVirtualMemory
for anonymous memory areas.
2002-08-10 David Welch <welch@computer2.darkstar.org>
* ntoskrnl/mm/anonmem.c: Moved functions relating to
areas created with NtAllocateVirtualMemory to a
seperate file.
2002-08-10 David Welch <welch@computer2.darkstar.org>
* ntoskrnl/mm/section.c (MmQuerySectionView): Implemented
NtQueryVirtualMemory for section views.
2002-08-10 David Welch <welch@computer2.darkstar.org>
* ntoskrnl/mm/section.c (MmAccessFaultSectionView,
MmNotPresentFaultSectionView, MmProtectSectionView,
MmMapViewOfSegment, MmAlterViewAttributes): Implemented
NtProtectVirtualMemory for section views.
2002-08-10 David Welch <welch@computer2.darkstar.org>
* ntoskrnl/ke/main.c: Removed SEH test code.
2002-08-10 David Welch <welch@computer2.darkstar.org>
* lib/ntdll/ldr/utils.c (LdrFixupImports): Remove the readonly
protection from the IAT before writing to it.
2002-08-10 David Welch <welch@computer2.darkstar.org>
* lib/ntdll/ldr/utils.c (LdrAdjustDllName): Properly null terminate
the base name of the DLL.
2002-08-10 David Welch <welch@computer2.darkstar.org>
* ntoskrnl/ldr/loader.c (LdrPEProcessModule): Set the text segment
of modules to readonly after loading.
2002-08-09 David Welch <welch@computer2.darkstar.org>
* ntoskrnl/ps/create.c (NtCreateThread): Call PsSuspendThread

47
reactos/lib/ntdll/ldr/utils.c
View file

@ -1,4 +1,4 @@
/* $Id: utils.c,v 1.52 2002/08/08 17:54:13 dwelch Exp $
/* $Id: utils.c,v 1.53 2002/08/10 16:41:17 dwelch Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -112,11 +112,13 @@ LdrAdjustDllName (PUNICODE_STRING FullDllName,
Pointer++;
Length = Extension - Pointer;
memmove (Buffer, Pointer, Length * sizeof(WCHAR));
Buffer[Length] = L'\0';
}
else
{
/* get the full dll name */
memmove (Buffer, DllName->Buffer, DllName->Length);
Buffer[DllName->Length / sizeof(WCHAR)] = L'\0';
}
/* Build the DLL's absolute name */
@ -941,6 +943,7 @@ static NTSTATUS LdrFixupImports(PIMAGE_NT_HEADERS NTHeaders,
ULONG Ordinal;
PVOID BaseAddress;
NTSTATUS Status;
ULONG IATSize;
DPRINT("LdrFixupImports(NTHeaders %x, ImageBase %x)\n", NTHeaders,
ImageBase);
@ -961,6 +964,8 @@ static NTSTATUS LdrFixupImports(PIMAGE_NT_HEADERS NTHeaders,
UNICODE_STRING DllName;
DWORD pName;
WORD pHint;
PVOID IATBase;
ULONG OldProtect;
DPRINT("ImportModule->Directory->dwRVAModuleName %s\n",
(PCHAR)(ImageBase + ImportModuleDirectory->dwRVAModuleName));
@ -1008,6 +1013,31 @@ static NTSTATUS LdrFixupImports(PIMAGE_NT_HEADERS NTHeaders,
(PULONG)(ImageBase
+ ImportModuleDirectory->dwRVAFunctionAddressList);
}
/*
* Get the size of IAT.
*/
IATSize = 0;
while (FunctionNameList[IATSize] != 0L)
{
IATSize++;
}
/*
* Unprotect the region we are about to write into.
*/
IATBase = (PVOID)ImportAddressList;
Status = NtProtectVirtualMemory(NtCurrentProcess(),
IATBase,
IATSize * sizeof(PVOID*),
PAGE_READWRITE,
&OldProtect);
if (!NT_SUCCESS(Status))
{
DbgPrint("LDR: Failed to unprotect IAT.\n");
return(Status);
}
/*
* Walk through function list and fixup addresses.
*/
@ -1036,6 +1066,21 @@ static NTSTATUS LdrFixupImports(PIMAGE_NT_HEADERS NTHeaders,
ImportAddressList++;
FunctionNameList++;
}
/*
* Protect the region we are about to write into.
*/
Status = NtProtectVirtualMemory(NtCurrentProcess(),
IATBase,
IATSize * sizeof(PVOID*),
OldProtect,
&OldProtect);
if (!NT_SUCCESS(Status))
{
DbgPrint("LDR: Failed to protect IAT.\n");
return(Status);
}
ImportModuleDirectory++;
}
return STATUS_SUCCESS;

6
reactos/ntoskrnl/Makefile
View file

@ -1,4 +1,4 @@
# $Id: Makefile,v 1.78 2002/07/25 13:18:31 ekohl Exp $
# $Id: Makefile,v 1.79 2002/08/10 16:41:17 dwelch Exp $
#
# ReactOS Operating System
#
@ -158,7 +158,9 @@ OBJECTS_MM = \
mm/pageop.o \
mm/balance.o \
mm/rmap.o \
mm/slab.o
mm/slab.o \
mm/anonmem.o \
mm/region.o
# I/O Subsystem (Io)
OBJECTS_IO = \

63
reactos/ntoskrnl/include/internal/mm.h
View file

@ -17,19 +17,17 @@ struct _MM_PAGEOP;
typedef ULONG SWAPENTRY;
#define MEMORY_AREA_INVALID (0)
#define MEMORY_AREA_SECTION_VIEW_COMMIT (1)
#define MEMORY_AREA_SECTION_VIEW (1)
#define MEMORY_AREA_CONTINUOUS_MEMORY (2)
#define MEMORY_AREA_NO_CACHE (3)
#define MEMORY_AREA_IO_MAPPING (4)
#define MEMORY_AREA_SYSTEM (5)
#define MEMORY_AREA_MDL_MAPPING (7)
#define MEMORY_AREA_VIRTUAL_MEMORY (8)
#define MEMORY_AREA_SECTION_VIEW_RESERVE (9)
#define MEMORY_AREA_CACHE_SEGMENT (10)
#define MEMORY_AREA_SHARED_DATA (11)
#define MEMORY_AREA_WORKING_SET (12)
#define MEMORY_AREA_KERNEL_STACK (13)
#define MEMORY_AREA_PAGED_POOL (14)
#define MEMORY_AREA_CACHE_SEGMENT (9)
#define MEMORY_AREA_SHARED_DATA (10)
#define MEMORY_AREA_KERNEL_STACK (11)
#define MEMORY_AREA_PAGED_POOL (12)
#define PAGE_TO_SECTION_PAGE_DIRECTORY_OFFSET(x) \
((x) / (4*1024*1024))
@ -137,10 +135,11 @@ typedef struct
LIST_ENTRY ViewListEntry;
PMM_SECTION_SEGMENT Segment;
BOOLEAN WriteCopyView;
LIST_ENTRY RegionListHead;
} SectionData;
struct
{
LIST_ENTRY SegmentListHead;
LIST_ENTRY RegionListHead;
} VirtualMemoryData;
} Data;
} MEMORY_AREA, *PMEMORY_AREA;
@ -547,4 +546,52 @@ MmDumpToPagingFile(ULONG BugCode,
ULONG BugCodeParameter4,
struct _KTRAP_FRAME* TrapFrame);
typedef VOID (*PMM_ALTER_REGION_FUNC)(PMADDRESS_SPACE AddressSpace,
PVOID BaseAddress, ULONG Length,
ULONG OldType, ULONG OldProtect,
ULONG NewType, ULONG NewProtect);
typedef struct _MM_REGION
{
ULONG Type;
ULONG Protect;
ULONG Length;
LIST_ENTRY RegionListEntry;
} MM_REGION, *PMM_REGION;
NTSTATUS
MmAlterRegion(PMADDRESS_SPACE AddressSpace, PVOID BaseAddress,
PLIST_ENTRY RegionListHead, PVOID StartAddress, ULONG Length,
ULONG NewType, ULONG NewProtect,
PMM_ALTER_REGION_FUNC AlterFunc);
VOID
MmInitialiseRegion(PLIST_ENTRY RegionListHead, ULONG Length, ULONG Type,
ULONG Protect);
PMM_REGION
MmFindRegion(PVOID BaseAddress, PLIST_ENTRY RegionListHead, PVOID Address,
PVOID* RegionBaseAddress);
NTSTATUS STDCALL
MmQueryAnonMem(PMEMORY_AREA MemoryArea,
PVOID Address,
PMEMORY_BASIC_INFORMATION Info,
PULONG ResultLength);
NTSTATUS STDCALL
MmQuerySectionView(PMEMORY_AREA MemoryArea,
PVOID Address,
PMEMORY_BASIC_INFORMATION Info,
PULONG ResultLength);
NTSTATUS
MmProtectAnonMem(PMADDRESS_SPACE AddressSpace,
PMEMORY_AREA MemoryArea,
PVOID BaseAddress,
ULONG Length,
ULONG Protect,
PULONG OldProtect);
NTSTATUS
MmProtectSectionView(PMADDRESS_SPACE AddressSpace,
PMEMORY_AREA MemoryArea,
PVOID BaseAddress,
ULONG Length,
ULONG Protect,
PULONG OldProtect);
#endif

190
reactos/ntoskrnl/ke/main.c
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: main.c,v 1.132 2002/07/29 15:27:59 ekohl Exp $
/* $Id: main.c,v 1.133 2002/08/10 16:41:18 dwelch Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/ke/main.c
@ -282,194 +282,6 @@ InitSystemSharedUserPage (PCSZ ParameterLine)
}
}
#ifndef NDEBUG
VOID DumpBIOSMemoryMap(VOID)
{
ULONG i;
DbgPrint("Dumping BIOS memory map:\n");
DbgPrint("Memory map base: %d\n", KeLoaderBlock.MmapAddr);
DbgPrint("Memory map size: %d\n", KeLoaderBlock.MmapLength);
DbgPrint("Address range count: %d\n", KeMemoryMapRangeCount);
for (i = 0; i < KeMemoryMapRangeCount; i++)
{
DbgPrint("Range: Base (%08X) Length (%08X) Type (%02X)\n",
KeMemoryMap[i].BaseAddrLow,
KeMemoryMap[i].LengthLow,
KeMemoryMap[i].Type);
}
for (;;);
}
#endif /* !NDEBUG */
#if 1
// SEH Test
static ULONG Scratch;
EXCEPTION_DISPOSITION
ExpUnhandledException1(
PEXCEPTION_RECORD ExceptionRecord,
PEXCEPTION_REGISTRATION ExceptionRegistration,
PCONTEXT Context,
PVOID DispatcherContext)
{
DbgPrint("ExpUnhandledException1() called\n");
DbgPrint("ExceptionRecord 0x%X\n", ExceptionRecord);
DbgPrint(" Flags 0x%X\n", ExceptionRecord->ExceptionFlags);
DbgPrint("ExceptionRegistration 0x%X\n", ExceptionRegistration);
DbgPrint("Context 0x%X\n", Context);
DbgPrint("DispatcherContext 0x%X\n", DispatcherContext);
Context->Eax = (ULONG)&Scratch;
return ExceptionContinueExecution;
}
EXCEPTION_DISPOSITION
ExpUnhandledException2(
PEXCEPTION_RECORD ExceptionRecord,
PEXCEPTION_REGISTRATION ExceptionRegistration,
PCONTEXT Context,
PVOID DispatcherContext)
{
DbgPrint("ExpUnhandledException2() called\n");
DbgPrint("ExceptionRecord 0x%X\n", ExceptionRecord);
DbgPrint(" Flags 0x%X\n", ExceptionRecord->ExceptionFlags);
DbgPrint("ExceptionRegistration 0x%X\n", ExceptionRegistration);
DbgPrint("Context 0x%X\n", Context);
DbgPrint("DispatcherContext 0x%X\n", DispatcherContext);
#if 1
Context->Eax = (ULONG)&Scratch;
return ExceptionContinueExecution;
#else
return ExceptionContinueSearch;
#endif
}
#if 1
// Put in mingw headers
extern VOID
CDECL
_local_unwind2(
PEXCEPTION_REGISTRATION RegistrationFrame,
DWORD TryLevel);
extern VOID
CDECL
_global_unwind2(
PVOID RegistrationFrame);
extern EXCEPTION_DISPOSITION
CDECL
_except_handler2(
PEXCEPTION_RECORD ExceptionRecord,
PEXCEPTION_REGISTRATION RegistrationFrame,
PCONTEXT Context,
PVOID DispatcherContext);
extern EXCEPTION_DISPOSITION
CDECL
_except_handler3(
PEXCEPTION_RECORD ExceptionRecord,
PEXCEPTION_REGISTRATION RegistrationFrame,
PCONTEXT Context,
PVOID DispatcherContext);
#endif
PRTL_EXCEPTION_REGISTRATION
CurrentRER(VOID)
{
ULONG Value;
__asm__("movl %%ebp, %0\n\t" : "=a" (Value));
return((PRTL_EXCEPTION_REGISTRATION)Value) - 1;
}
PULONG x;
PRTL_EXCEPTION_REGISTRATION TestER;
SCOPETABLE_ENTRY ScopeTable;
PEXCEPTION_REGISTRATION OSPtr;
DWORD CDECL SEHFilterRoutine(VOID)
{
DbgPrint("Within filter routine.\n");
return EXCEPTION_EXECUTE_HANDLER;
//return EXCEPTION_CONTINUE_EXECUTION;
}
VOID CDECL SEHHandlerRoutine(VOID)
{
DbgPrint("Within exception handler.\n");
DbgPrint("System halted.\n");
for (;;);
}
VOID SEHTest()
{
RTL_EXCEPTION_REGISTRATION ER;
LPEXCEPTION_POINTERS ExceptionPointers;
PVOID StandardESPInFrame;
__asm__ ("movl %%esp,%%eax;" : "=a" (StandardESPInFrame));
DbgPrint("StandardESPInFrame: 0x%X\n", StandardESPInFrame);
ExceptionPointers = NULL;
ER.OS.handler = _except_handler3;
__asm__ ("movl %%fs:0,%%eax;" : "=a" (ER.OS.prev));
DbgPrint("ER.OS.prev: 0x%X\n", ER.OS.prev);
ER.ScopeTable = &ScopeTable;
DbgPrint("ER.ScopeTable: 0x%X\n", ER.ScopeTable);
ER.TryLevel = -1;
__asm__ ("movl %%ebp,%%eax;" : "=a" (ER.Ebp));
DbgPrint("ER.Ebp: 0x%X\n", ER.Ebp);
ScopeTable.PreviousTryLevel = -1;
ScopeTable.FilterRoutine = SEHFilterRoutine;
DbgPrint("ScopeTable.FilterRoutine: 0x%X\n", ScopeTable.FilterRoutine);
ScopeTable.HandlerRoutine = SEHHandlerRoutine;
DbgPrint("ScopeTable.HandlerRoutine: 0x%X\n", ScopeTable.HandlerRoutine);
OSPtr = &ER.OS;
DbgPrint("OSPtr: 0x%X\n", OSPtr);
__asm__ ("movl %0,%%eax;movl %%eax,%%fs:0;" : : "m" (OSPtr));
/*__try1(__except_handler3)*/ if(1) {
ER.TryLevel = 0; // Entered first try... block
DbgPrint("Within guarded section.\n");
x = (PULONG)0xf2000000; *x = 0;
DbgPrint("After exception.\n");
} /* __except1 */ if(0) {
}
DbgPrint("After exception2.\n");
__asm__ ("movl %0,%%eax;movl %%eax,%%fs:0;" : : "m" (ER.OS.prev));
//KeGetCurrentKPCR()->ExceptionList = ER.OS.prev;
DbgPrint("Exiting.\n");
}
#endif
VOID
ExpInitializeExecutive(VOID)
{

27
reactos/ntoskrnl/ldr/loader.c
View file

@ -1,4 +1,4 @@
/* $Id: loader.c,v 1.118 2002/07/18 00:25:31 dwelch Exp $
/* $Id: loader.c,v 1.119 2002/08/10 16:41:18 dwelch Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -35,6 +35,7 @@
#include <internal/ldr.h>
#include <internal/pool.h>
#include <internal/kd.h>
#include <ntos/minmax.h>
#ifdef HALDBG
#include <internal/ntosdbg.h>
@ -1098,6 +1099,30 @@ LdrPEProcessModule(PVOID ModuleLoadBase,
}
}
/* Set the protections for the various parts of the driver */
for (Idx = 0; Idx < PEFileHeader->NumberOfSections; Idx++)
{
ULONG Characteristics = PESectionHeaders[Idx].Characteristics;
ULONG Length;
PVOID BaseAddress;
ULONG i;
Length =
max(PESectionHeaders[Idx].Misc.VirtualSize,
PESectionHeaders[Idx].SizeOfRawData);
BaseAddress = PESectionHeaders[Idx].VirtualAddress + DriverBase;
if (Characteristics & IMAGE_SECTION_CHAR_CODE &&
!(Characteristics & IMAGE_SECTION_CHAR_WRITABLE ||
Characteristics & IMAGE_SECTION_CHAR_DATA ||
Characteristics & IMAGE_SECTION_CHAR_BSS))
{
for (i = 0; i < PAGE_ROUND_DOWN(Length); i++)
{
MmSetPageProtect(NULL, BaseAddress + (i * PAGESIZE),
PAGE_READONLY);
}
}
}
/* Create the module */
CreatedModuleObject = ExAllocatePool(NonPagedPool, sizeof(MODULE_OBJECT));
if (CreatedModuleObject == NULL)

809
reactos/ntoskrnl/mm/anonmem.c Normal file
View file

@ -0,0 +1,809 @@
/*
* ReactOS kernel
* Copyright (C) 1998, 1999, 2000, 2001, 2002 ReactOS Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: anonmem.c,v 1.1 2002/08/10 16:41:19 dwelch Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/mm/anonmem.c
* PURPOSE: Implementing anonymous memory.
* PROGRAMMER: David Welch
*/
/* INCLUDE *****************************************************************/
#include <ddk/ntddk.h>
#include <internal/mm.h>
#include <internal/ob.h>
#include <internal/io.h>
#include <internal/ps.h>
#include <internal/pool.h>
#define NDEBUG
#include <internal/debug.h>
/* FUNCTIONS *****************************************************************/
NTSTATUS
MmWritePageVirtualMemory(PMADDRESS_SPACE AddressSpace,
PMEMORY_AREA MArea,
PVOID Address)
{
return(STATUS_UNSUCCESSFUL);
}
NTSTATUS
MmPageOutVirtualMemory(PMADDRESS_SPACE AddressSpace,
PMEMORY_AREA MemoryArea,
PVOID Address,
PMM_PAGEOP PageOp)
{
PHYSICAL_ADDRESS PhysicalAddress;
BOOL WasDirty;
SWAPENTRY SwapEntry;
NTSTATUS Status;
PMDL Mdl;
DPRINT("MmPageOutVirtualMemory(Address 0x%.8X) PID %d\n",
Address, MemoryArea->Process->UniqueProcessId);
/*
* Check for paging out from a deleted virtual memory area.
*/
if (MemoryArea->DeleteInProgress)
{
return(STATUS_UNSUCCESSFUL);
}
/*
* Paging out code or readonly data is easy.
*/
if ((MemoryArea->Attributes & PAGE_READONLY) ||
(MemoryArea->Attributes & PAGE_EXECUTE_READ))
{
MmDeleteVirtualMapping(MemoryArea->Process, Address, FALSE,
NULL, &PhysicalAddress);
MmDeleteAllRmaps(PhysicalAddress, NULL, NULL);
if (MmGetSavedSwapEntryPage(PhysicalAddress) != 0)
{
DPRINT1("Read-only page was swapped out.\n");
KeBugCheck(0);
}
MmReleasePageMemoryConsumer(MC_USER, PhysicalAddress);
PageOp->Status = STATUS_SUCCESS;
KeSetEvent(&PageOp->CompletionEvent, IO_NO_INCREMENT, FALSE);
MmReleasePageOp(PageOp);
return(STATUS_SUCCESS);
}
/*
* Otherwise this is read-write data
*/
MmDisableVirtualMapping(MemoryArea->Process, Address,
&WasDirty, (PULONG)&PhysicalAddress);
if (PhysicalAddress.QuadPart == 0)
{
KeBugCheck(0);
}
if (!WasDirty)
{
MmDeleteVirtualMapping(MemoryArea->Process, Address, FALSE, NULL, NULL);
MmDeleteAllRmaps(PhysicalAddress, NULL, NULL);
if ((SwapEntry = MmGetSavedSwapEntryPage(PhysicalAddress)) != 0)
{
MmCreatePageFileMapping(MemoryArea->Process, Address, SwapEntry);
MmSetSavedSwapEntryPage(PhysicalAddress, 0);
}
MmReleasePageMemoryConsumer(MC_USER, PhysicalAddress);
PageOp->Status = STATUS_SUCCESS;
KeSetEvent(&PageOp->CompletionEvent, IO_NO_INCREMENT, FALSE);
MmReleasePageOp(PageOp);
return(STATUS_SUCCESS);
}
/*
* If necessary, allocate an entry in the paging file for this page
*/
SwapEntry = MmGetSavedSwapEntryPage(PhysicalAddress);
if (SwapEntry == 0)
{
SwapEntry = MmAllocSwapPage();
if (SwapEntry == 0)
{
MmEnableVirtualMapping(MemoryArea->Process, Address);
PageOp->Status = STATUS_UNSUCCESSFUL;
KeSetEvent(&PageOp->CompletionEvent, IO_NO_INCREMENT, FALSE);
MmReleasePageOp(PageOp);
return(STATUS_UNSUCCESSFUL);
}
}
/*
* Write the page to the pagefile
*/
Mdl = MmCreateMdl(NULL, NULL, PAGESIZE);
MmBuildMdlFromPages(Mdl, (PULONG)&PhysicalAddress);
Status = MmWriteToSwapPage(SwapEntry, Mdl);
if (!NT_SUCCESS(Status))
{
DPRINT1("MM: Failed to write to swap page (Status was 0x%.8X)\n",
Status);
MmEnableVirtualMapping(MemoryArea->Process, Address);
PageOp->Status = STATUS_UNSUCCESSFUL;
KeSetEvent(&PageOp->CompletionEvent, IO_NO_INCREMENT, FALSE);
MmReleasePageOp(PageOp);
return(STATUS_UNSUCCESSFUL);
}
/*
* Otherwise we have succeeded, free the page
*/
DPRINT("MM: Swapped out virtual memory page 0x%.8X!\n", PhysicalAddress);
MmDeleteVirtualMapping(MemoryArea->Process, Address, FALSE, NULL, NULL);
MmCreatePageFileMapping(MemoryArea->Process, Address, SwapEntry);
MmDeleteAllRmaps(PhysicalAddress, NULL, NULL);
MmSetSavedSwapEntryPage(PhysicalAddress, 0);
MmReleasePageMemoryConsumer(MC_USER, PhysicalAddress);
PageOp->Status = STATUS_SUCCESS;
KeSetEvent(&PageOp->CompletionEvent, IO_NO_INCREMENT, FALSE);
MmReleasePageOp(PageOp);
return(STATUS_SUCCESS);
}
NTSTATUS
MmNotPresentFaultVirtualMemory(PMADDRESS_SPACE AddressSpace,
MEMORY_AREA* MemoryArea,
PVOID Address,
BOOLEAN Locked)
/*
* FUNCTION: Move data into memory to satisfy a page not present fault
* ARGUMENTS:
* AddressSpace = Address space within which the fault occurred
* MemoryArea = The memory area within which the fault occurred
* Address = The absolute address of fault
* RETURNS: Status
* NOTES: This function is called with the address space lock held.
*/
{
PHYSICAL_ADDRESS Page;
NTSTATUS Status;
PMM_REGION Region;
PMM_PAGEOP PageOp;
/*
* There is a window between taking the page fault and locking the
* address space when another thread could load the page so we check
* that.
*/
if (MmIsPagePresent(NULL, Address))
{
if (Locked)
{
MmLockPage(MmGetPhysicalAddressForProcess(NULL, Address));
}
return(STATUS_SUCCESS);
}
/*
* Check for the virtual memory area being deleted.
*/
if (MemoryArea->DeleteInProgress)
{
return(STATUS_UNSUCCESSFUL);
}
/*
* Get the segment corresponding to the virtual address
*/
Region = MmFindRegion(MemoryArea->BaseAddress,
&MemoryArea->Data.VirtualMemoryData.RegionListHead,
Address, NULL);
if (Region->Type == MEM_RESERVE)
{
return(STATUS_UNSUCCESSFUL);
}
/*
* Get or create a page operation
*/
PageOp = MmGetPageOp(MemoryArea, (ULONG)PsGetCurrentProcessId(),
(PVOID)PAGE_ROUND_DOWN(Address), NULL, 0,
MM_PAGEOP_PAGEIN);
if (PageOp == NULL)
{
DPRINT1("MmGetPageOp failed");
KeBugCheck(0);
}
/*
* Check if someone else is already handling this fault, if so wait
* for them
*/
if (PageOp->Thread != PsGetCurrentThread())
{
MmUnlockAddressSpace(AddressSpace);
Status = KeWaitForSingleObject(&PageOp->CompletionEvent,
0,
KernelMode,
FALSE,
NULL);
/*
* Check for various strange conditions
*/
if (Status != STATUS_SUCCESS)
{
DPRINT1("Failed to wait for page op\n");
KeBugCheck(0);
}
if (PageOp->Status == STATUS_PENDING)
{
DPRINT1("Woke for page op before completion\n");
KeBugCheck(0);
}
/*
* If this wasn't a pagein then we need to restart the handling
*/
if (PageOp->OpType != MM_PAGEOP_PAGEIN)
{
MmLockAddressSpace(AddressSpace);
MmReleasePageOp(PageOp);
return(STATUS_MM_RESTART_OPERATION);
}
/*
* If the thread handling this fault has failed then we don't retry
*/
if (!NT_SUCCESS(PageOp->Status))
{
MmLockAddressSpace(AddressSpace);
MmReleasePageOp(PageOp);
return(Status);
}
MmLockAddressSpace(AddressSpace);
if (Locked)
{
MmLockPage(MmGetPhysicalAddressForProcess(NULL, Address));
}
MmReleasePageOp(PageOp);
return(STATUS_SUCCESS);
}
/*
* Try to allocate a page
*/
Status = MmRequestPageMemoryConsumer(MC_USER, FALSE, &Page);
if (Status == STATUS_NO_MEMORY)
{
MmUnlockAddressSpace(AddressSpace);
Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, &Page);
MmLockAddressSpace(AddressSpace);
}
/*
* Handle swapped out pages.
*/
if (MmIsPageSwapEntry(NULL, Address))
{
SWAPENTRY SwapEntry;
PMDL Mdl;
MmDeletePageFileMapping(NULL, Address, &SwapEntry);
Mdl = MmCreateMdl(NULL, NULL, PAGESIZE);
MmBuildMdlFromPages(Mdl, (PULONG)&Page);
Status = MmReadFromSwapPage(SwapEntry, Mdl);
if (!NT_SUCCESS(Status))
{
KeBugCheck(0);
}
MmSetSavedSwapEntryPage(Page, SwapEntry);
}
/*
* Set the page. If we fail because we are out of memory then
* try again
*/
Status = MmCreateVirtualMapping(PsGetCurrentProcess(),
Address,
MemoryArea->Attributes,
Page,
FALSE);
while (Status == STATUS_NO_MEMORY)
{
MmUnlockAddressSpace(AddressSpace);
Status = MmCreateVirtualMapping(PsGetCurrentProcess(),
Address,
MemoryArea->Attributes,
Page,
TRUE);
MmLockAddressSpace(AddressSpace);
}
if (!NT_SUCCESS(Status))
{
DPRINT1("MmCreateVirtualMapping failed, not out of memory\n");
KeBugCheck(0);
return(Status);
}
/*
* Add the page to the process's working set
*/
MmInsertRmap(Page, PsGetCurrentProcess(), (PVOID)PAGE_ROUND_DOWN(Address));
/*
* Finish the operation
*/
if (Locked)
{
MmLockPage(MmGetPhysicalAddressForProcess(NULL, Address));
}
PageOp->Status = STATUS_SUCCESS;
KeSetEvent(&PageOp->CompletionEvent, IO_NO_INCREMENT, FALSE);
MmReleasePageOp(PageOp);
return(STATUS_SUCCESS);
}
VOID STATIC
MmModifyAttributes(PMADDRESS_SPACE AddressSpace,
PVOID BaseAddress,
ULONG RegionSize,
ULONG OldType,
ULONG OldProtect,
ULONG NewType,
ULONG NewProtect)
/*
* FUNCTION: Modify the attributes of a memory region
*/
{
/*
* If we are switching a previously committed region to reserved then
* free any allocated pages within the region
*/
if (NewType == MEM_RESERVE && OldType == MEM_COMMIT)
{
ULONG i;
for (i=0; i <= (RegionSize/PAGESIZE); i++)
{
LARGE_INTEGER PhysicalAddr;
if (MmIsPageSwapEntry(AddressSpace->Process,
BaseAddress + (i * PAGESIZE)))
{
SWAPENTRY SwapEntry;
MmDeletePageFileMapping(AddressSpace->Process,
BaseAddress + (i * PAGESIZE),
&SwapEntry);
MmFreeSwapPage(SwapEntry);
}
else
{
PhysicalAddr = MmGetPhysicalAddress(BaseAddress + (i*PAGESIZE));
MmDeleteVirtualMapping(AddressSpace->Process,
BaseAddress + (i*PAGESIZE),
FALSE, NULL, NULL);
if (PhysicalAddr.QuadPart != 0)
{
MmDeleteRmap(PhysicalAddr, AddressSpace->Process,
BaseAddress + (i * PAGESIZE));
MmReleasePageMemoryConsumer(MC_USER, PhysicalAddr);
}
}
}
}
/*
* If we are changing the protection attributes of a committed region then
* alter the attributes for any allocated pages within the region
*/
if (NewType == MEM_COMMIT && OldType == MEM_COMMIT &&
OldProtect != NewProtect)
{
ULONG i;
for (i=0; i <= (RegionSize/PAGESIZE); i++)
{
if (MmIsPagePresent(AddressSpace->Process,
BaseAddress + (i*PAGESIZE)))
{
MmSetPageProtect(AddressSpace->Process,
BaseAddress + (i*PAGESIZE),
NewProtect);
}
}
}
}
NTSTATUS STDCALL
NtAllocateVirtualMemory(IN HANDLE ProcessHandle,
IN OUT PVOID* UBaseAddress,
IN ULONG ZeroBits,
IN OUT PULONG URegionSize,
IN ULONG AllocationType,
IN ULONG Protect)
/*
* FUNCTION: Allocates a block of virtual memory in the process address space
* ARGUMENTS:
* ProcessHandle = The handle of the process which owns the virtual memory
* BaseAddress = A pointer to the virtual memory allocated. If you
* supply a non zero value the system will try to
* allocate the memory at the address supplied. It round
* it down to a multiple of the page size.
* ZeroBits = (OPTIONAL) You can specify the number of high order bits
* that must be zero, ensuring that the memory will be
* allocated at a address below a certain value.
* RegionSize = The number of bytes to allocate
* AllocationType = Indicates the type of virtual memory you like to
* allocated, can be a combination of MEM_COMMIT,
* MEM_RESERVE, MEM_RESET, MEM_TOP_DOWN.
* Protect = Indicates the protection type of the pages allocated, can be
* a combination of PAGE_READONLY, PAGE_READWRITE,
* PAGE_EXECUTE_READ, PAGE_EXECUTE_READWRITE, PAGE_GUARD,
* PAGE_NOACCESS
* REMARKS:
* This function maps to the win32 VirtualAllocEx. Virtual memory is
* process based so the protocol starts with a ProcessHandle. I
* splitted the functionality of obtaining the actual address and
* specifying the start address in two parameters ( BaseAddress and
* StartAddress ) The NumberOfBytesAllocated specify the range and the
* AllocationType and ProctectionType map to the other two parameters.
* RETURNS: Status
*/
{
PEPROCESS Process;
MEMORY_AREA* MemoryArea;
ULONG Type;
NTSTATUS Status;
PMADDRESS_SPACE AddressSpace;
PVOID BaseAddress;
ULONG RegionSize;
PVOID PBaseAddress;
ULONG PRegionSize;
DPRINT("NtAllocateVirtualMemory(*UBaseAddress %x, "
"ZeroBits %d, *URegionSize %x, AllocationType %x, Protect %x)\n",
*UBaseAddress,ZeroBits,*URegionSize,AllocationType,
Protect);
/*
* Check the validity of the parameters
*/
if ((Protect & PAGE_FLAGS_VALID_FROM_USER_MODE) != Protect)
{
return(STATUS_INVALID_PAGE_PROTECTION);
}
if ((AllocationType & (MEM_COMMIT | MEM_RESERVE)) == 0)
{
return(STATUS_INVALID_PARAMETER);
}
PBaseAddress = *UBaseAddress;
PRegionSize = *URegionSize;
BaseAddress = (PVOID)PAGE_ROUND_DOWN(PBaseAddress);
RegionSize = PAGE_ROUND_UP(PBaseAddress + PRegionSize) -
PAGE_ROUND_DOWN(PBaseAddress);
Status = ObReferenceObjectByHandle(ProcessHandle,
PROCESS_VM_OPERATION,
NULL,
UserMode,
(PVOID*)(&Process),
NULL);
if (!NT_SUCCESS(Status))
{
DPRINT("NtAllocateVirtualMemory() = %x\n",Status);
return(Status);
}
Type = (AllocationType & MEM_COMMIT) ? MEM_COMMIT : MEM_RESERVE;
DPRINT("Type %x\n", Type);
AddressSpace = &Process->AddressSpace;
MmLockAddressSpace(AddressSpace);
if (PBaseAddress != 0)
{
MemoryArea = MmOpenMemoryAreaByAddress(&Process->AddressSpace,
BaseAddress);
if (MemoryArea != NULL &&
MemoryArea->Type == MEMORY_AREA_VIRTUAL_MEMORY &&
MemoryArea->Length >= RegionSize)
{
Status =
MmAlterRegion(&Process->AddressSpace,
MemoryArea->BaseAddress,
&MemoryArea->Data.VirtualMemoryData.RegionListHead,
PBaseAddress, RegionSize,
Type, Protect, MmModifyAttributes);
MmUnlockAddressSpace(AddressSpace);
ObDereferenceObject(Process);
DPRINT("NtAllocateVirtualMemory() = %x\n",Status);
return(Status);
}
else if (MemoryArea != NULL)
{
MmUnlockAddressSpace(AddressSpace);
ObDereferenceObject(Process);
return(STATUS_UNSUCCESSFUL);
}
}
Status = MmCreateMemoryArea(Process,
&Process->AddressSpace,
MEMORY_AREA_VIRTUAL_MEMORY,
&BaseAddress,
RegionSize,
Protect,
&MemoryArea,
PBaseAddress != 0);
if (!NT_SUCCESS(Status))
{
MmUnlockAddressSpace(AddressSpace);
ObDereferenceObject(Process);
DPRINT("NtAllocateVirtualMemory() = %x\n",Status);
return(Status);
}
MmInitialiseRegion(&MemoryArea->Data.VirtualMemoryData.RegionListHead,
RegionSize, Type, Protect);
if ((AllocationType & MEM_COMMIT) &&
((Protect & PAGE_READWRITE) ||
(Protect & PAGE_EXECUTE_READWRITE)))
{
MmReserveSwapPages(RegionSize);
}
*UBaseAddress = BaseAddress;
*URegionSize = RegionSize;
DPRINT("*UBaseAddress %x *URegionSize %x\n", BaseAddress, RegionSize);
MmUnlockAddressSpace(AddressSpace);
ObDereferenceObject(Process);
return(STATUS_SUCCESS);
}
VOID STATIC
MmFreeVirtualMemoryPage(PVOID Context,
MEMORY_AREA* MemoryArea,
PVOID Address,
PHYSICAL_ADDRESS PhysicalAddr,
SWAPENTRY SwapEntry,
BOOLEAN Dirty)
{
PEPROCESS Process = (PEPROCESS)Context;
if (PhysicalAddr.QuadPart != 0)
{
MmDeleteRmap(PhysicalAddr, Process, Address);
MmReleasePageMemoryConsumer(MC_USER, PhysicalAddr);
}
else if (SwapEntry != 0)
{
MmFreeSwapPage(SwapEntry);
}
}
VOID
MmFreeVirtualMemory(PEPROCESS Process,
PMEMORY_AREA MemoryArea)
{
PLIST_ENTRY current_entry;
PMM_REGION current;
ULONG i;
DPRINT("MmFreeVirtualMemory(Process %p MemoryArea %p)\n", Process,
MemoryArea);
/* Mark this memory area as about to be deleted. */
MemoryArea->DeleteInProgress = TRUE;
/*
* Wait for any ongoing paging operations. Notice that since we have
* flagged this memory area as deleted no more page ops will be added.
*/
if (MemoryArea->PageOpCount > 0)
{
for (i = 0; i < (PAGE_ROUND_UP(MemoryArea->Length) / PAGESIZE); i++)
{
PMM_PAGEOP PageOp;
if (MemoryArea->PageOpCount == 0)
{
break;
}
PageOp = MmCheckForPageOp(MemoryArea, Process->UniqueProcessId,
MemoryArea->BaseAddress + (i * PAGESIZE),
NULL, 0);
if (PageOp != NULL)
{
NTSTATUS Status;
MmUnlockAddressSpace(&Process->AddressSpace);
Status = KeWaitForSingleObject(&PageOp->CompletionEvent,
0,
KernelMode,
FALSE,
NULL);
if (Status != STATUS_SUCCESS)
{
DPRINT1("Failed to wait for page op\n");
KeBugCheck(0);
}
MmLockAddressSpace(&Process->AddressSpace);
MmReleasePageOp(PageOp);
}
}
}
/* Free all the individual segments. */
current_entry = MemoryArea->Data.VirtualMemoryData.RegionListHead.Flink;
while (current_entry != &MemoryArea->Data.VirtualMemoryData.RegionListHead)
{
current = CONTAINING_RECORD(current_entry, MM_REGION, RegionListEntry);
current_entry = current_entry->Flink;
ExFreePool(current);
}
/* Actually free the memory area. */
MmFreeMemoryArea(&Process->AddressSpace,
MemoryArea->BaseAddress,
0,
MmFreeVirtualMemoryPage,
(PVOID)Process);
}
NTSTATUS STDCALL
NtFreeVirtualMemory(IN HANDLE ProcessHandle,
IN PVOID* PBaseAddress,
IN PULONG PRegionSize,
IN ULONG FreeType)
/*
* FUNCTION: Frees a range of virtual memory
* ARGUMENTS:
* ProcessHandle = Points to the process that allocated the virtual
* memory
* BaseAddress = Points to the memory address, rounded down to a
* multiple of the pagesize
* RegionSize = Limits the range to free, rounded up to a multiple of
* the paging size
* FreeType = Can be one of the values: MEM_DECOMMIT, or MEM_RELEASE
* RETURNS: Status
*/
{
MEMORY_AREA* MemoryArea;
NTSTATUS Status;
PEPROCESS Process;
PMADDRESS_SPACE AddressSpace;
PVOID BaseAddress;
ULONG RegionSize;
DPRINT("NtFreeVirtualMemory(ProcessHandle %x, *PBaseAddress %x, "
"*PRegionSize %x, FreeType %x)\n",ProcessHandle,*PBaseAddress,
*PRegionSize,FreeType);
BaseAddress = (PVOID)PAGE_ROUND_DOWN((*PBaseAddress));
RegionSize = PAGE_ROUND_UP((*PBaseAddress) + (*PRegionSize)) -
PAGE_ROUND_DOWN((*PBaseAddress));
Status = ObReferenceObjectByHandle(ProcessHandle,
PROCESS_VM_OPERATION,
PsProcessType,
UserMode,
(PVOID*)(&Process),
NULL);
if (!NT_SUCCESS(Status))
{
return(Status);
}
AddressSpace = &Process->AddressSpace;
MmLockAddressSpace(AddressSpace);
MemoryArea = MmOpenMemoryAreaByAddress(AddressSpace,
BaseAddress);
if (MemoryArea == NULL)
{
MmUnlockAddressSpace(AddressSpace);
ObDereferenceObject(Process);
return(STATUS_UNSUCCESSFUL);
}
switch (FreeType)
{
case MEM_RELEASE:
/* We can only free a memory area in one step. */
if (MemoryArea->BaseAddress != BaseAddress)
{
MmUnlockAddressSpace(AddressSpace);
ObDereferenceObject(Process);
return(STATUS_UNSUCCESSFUL);
}
MmFreeVirtualMemory(Process, MemoryArea);
MmUnlockAddressSpace(AddressSpace);
ObDereferenceObject(Process);
return(STATUS_SUCCESS);
case MEM_DECOMMIT:
Status =
MmAlterRegion(AddressSpace,
MemoryArea->BaseAddress,
&MemoryArea->Data.VirtualMemoryData.RegionListHead,
BaseAddress,
RegionSize,
MEM_RESERVE,
PAGE_NOACCESS,
MmModifyAttributes);
MmUnlockAddressSpace(AddressSpace);
ObDereferenceObject(Process);
return(Status);
}
MmUnlockAddressSpace(AddressSpace);
ObDereferenceObject(Process);
return(STATUS_NOT_IMPLEMENTED);
}
NTSTATUS
MmProtectAnonMem(PMADDRESS_SPACE AddressSpace,
PMEMORY_AREA MemoryArea,
PVOID BaseAddress,
ULONG Length,
ULONG Protect,
PULONG OldProtect)
{
PMM_REGION Region;
NTSTATUS Status;
Region = MmFindRegion(MemoryArea->BaseAddress,
&MemoryArea->Data.VirtualMemoryData.RegionListHead,
BaseAddress, NULL);
*OldProtect = Region->Protect;
Status = MmAlterRegion(AddressSpace, MemoryArea->BaseAddress,
&MemoryArea->Data.VirtualMemoryData.RegionListHead,
BaseAddress, Length, Region->Type, Protect,
MmModifyAttributes);
return(Status);
}
NTSTATUS STDCALL
MmQueryAnonMem(PMEMORY_AREA MemoryArea,
PVOID Address,
PMEMORY_BASIC_INFORMATION Info,
PULONG ResultLength)
{
PMM_REGION Region;
PVOID RegionBase;
Info->BaseAddress = (PVOID)PAGE_ROUND_DOWN(Address);
Region = MmFindRegion(MemoryArea->BaseAddress,
&MemoryArea->Data.VirtualMemoryData.RegionListHead,
Address, &RegionBase);
Info->AllocationBase = RegionBase;
Info->AllocationProtect = Region->Protect; /* FIXME */
Info->RegionSize = Region->Length;
Info->State = Region->Type;
Info->Protect = Region->Protect;
Info->Type = MEM_PRIVATE;
return(STATUS_SUCCESS);
}
/* EOF */

6
reactos/ntoskrnl/mm/i386/page.c
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: page.c,v 1.38 2002/06/10 21:34:38 hbirr Exp $
/* $Id: page.c,v 1.39 2002/08/10 16:41:20 dwelch Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/mm/i386/page.c
@ -1082,14 +1082,14 @@ MmSetPageProtect(PEPROCESS Process, PVOID Address, ULONG flProtect)
Process, Address, flProtect);
Attributes = ProtectToPTE(flProtect);
if (Process != CurrentProcess)
if (Process != NULL && Process != CurrentProcess)
{
KeAttachProcess(Process);
}
PageEntry = MmGetPageEntry(Address);
(*PageEntry) = PAGE_MASK(*PageEntry) | Attributes;
FLUSH_TLB;
if (Process != CurrentProcess)
if (Process != NULL && Process != CurrentProcess)
{
KeDetachProcess();
}

9
reactos/ntoskrnl/mm/mm.c
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: mm.c,v 1.57 2002/06/04 15:26:56 dwelch Exp $
/* $Id: mm.c,v 1.58 2002/08/10 16:41:19 dwelch Exp $
*
* COPYRIGHT: See COPYING in the top directory
* PROJECT: ReactOS kernel
@ -59,8 +59,7 @@ NTSTATUS MmReleaseMemoryArea(PEPROCESS Process, PMEMORY_AREA Marea)
switch (Marea->Type)
{
case MEMORY_AREA_SECTION_VIEW_COMMIT:
case MEMORY_AREA_SECTION_VIEW_RESERVE:
case MEMORY_AREA_SECTION_VIEW:
Status = MmUnmapViewOfSection(Process, Marea->BaseAddress);
assert(Status == STATUS_SUCCESS);
return(STATUS_SUCCESS);
@ -214,7 +213,7 @@ NTSTATUS MmAccessFault(KPROCESSOR_MODE Mode,
Status = STATUS_SUCCESS;
break;
case MEMORY_AREA_SECTION_VIEW_COMMIT:
case MEMORY_AREA_SECTION_VIEW:
Status = MmAccessFaultSectionView(AddressSpace,
MemoryArea,
(PVOID)Address,
@ -346,7 +345,7 @@ NTSTATUS MmNotPresentFault(KPROCESSOR_MODE Mode,
Status = STATUS_UNSUCCESSFUL;
break;
case MEMORY_AREA_SECTION_VIEW_COMMIT:
case MEMORY_AREA_SECTION_VIEW:
Status = MmNotPresentFaultSectionView(AddressSpace,
MemoryArea,
(PVOID)Address,

12
reactos/ntoskrnl/mm/pageop.c
View file

@ -1,4 +1,4 @@
/* $Id: pageop.c,v 1.10 2002/06/11 22:09:02 dwelch Exp $
/* $Id: pageop.c,v 1.11 2002/08/10 16:41:19 dwelch Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -80,7 +80,7 @@ MmCheckForPageOp(PMEMORY_AREA MArea, ULONG Pid, PVOID Address,
/*
* Calcuate the hash value for pageop structure
*/
if (MArea->Type == MEMORY_AREA_SECTION_VIEW_COMMIT)
if (MArea->Type == MEMORY_AREA_SECTION_VIEW)
{
Hash = (((ULONG)Segment) | (((ULONG)Offset) / PAGESIZE));
}
@ -98,7 +98,7 @@ MmCheckForPageOp(PMEMORY_AREA MArea, ULONG Pid, PVOID Address,
PageOp = MmPageOpHashTable[Hash];
while (PageOp != NULL)
{
if (MArea->Type == MEMORY_AREA_SECTION_VIEW_COMMIT)
if (MArea->Type == MEMORY_AREA_SECTION_VIEW)
{
if (PageOp->Segment == Segment &&
PageOp->Offset == Offset)
@ -147,7 +147,7 @@ MmGetPageOp(PMEMORY_AREA MArea, ULONG Pid, PVOID Address,
/*
* Calcuate the hash value for pageop structure
*/
if (MArea->Type == MEMORY_AREA_SECTION_VIEW_COMMIT)
if (MArea->Type == MEMORY_AREA_SECTION_VIEW)
{
Hash = (((ULONG)Segment) | (((ULONG)Offset) / PAGESIZE));
}
@ -165,7 +165,7 @@ MmGetPageOp(PMEMORY_AREA MArea, ULONG Pid, PVOID Address,
PageOp = MmPageOpHashTable[Hash];
while (PageOp != NULL)
{
if (MArea->Type == MEMORY_AREA_SECTION_VIEW_COMMIT)
if (MArea->Type == MEMORY_AREA_SECTION_VIEW)
{
if (PageOp->Segment == Segment &&
PageOp->Offset == Offset)
@ -206,7 +206,7 @@ MmGetPageOp(PMEMORY_AREA MArea, ULONG Pid, PVOID Address,
return(NULL);
}
if (MArea->Type != MEMORY_AREA_SECTION_VIEW_COMMIT)
if (MArea->Type != MEMORY_AREA_SECTION_VIEW)
{
PageOp->Pid = Pid;
PageOp->Address = Address;

303
reactos/ntoskrnl/mm/region.c Normal file
View file

@ -0,0 +1,303 @@
/*
* ReactOS kernel
* Copyright (C) 1998, 1999, 2000, 2001, 2002 ReactOS Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: region.c,v 1.1 2002/08/10 16:41:19 dwelch Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/mm/region.c
* PROGRAMMER: David Welch
* PURPOSE:
*/
/* INCLUDE *****************************************************************/
#include <ddk/ntddk.h>
#include <internal/mm.h>
#include <internal/ob.h>
#include <internal/io.h>
#include <internal/ps.h>
#include <internal/pool.h>
#include <ntos/minmax.h>
#define NDEBUG
#include <internal/debug.h>
/* GLOBALS *******************************************************************/
#define TAG_MM_REGION TAG('M', 'R', 'G', 'N')
/* FUNCTIONS *****************************************************************/
VOID STATIC
InsertAfterEntry(PLIST_ENTRY Previous,
PLIST_ENTRY Entry)
/*
* FUNCTION: Insert a list entry after another entry in the list
*/
{
Previous->Flink->Blink = Entry;
Entry->Flink = Previous->Flink;
Entry->Blink = Previous;
Previous->Flink = Entry;
}
PMM_REGION STATIC
MmSplitRegion(PMM_REGION InitialRegion, PVOID InitialBaseAddress,
PVOID StartAddress, ULONG Length, ULONG NewType,
ULONG NewProtect, PMADDRESS_SPACE AddressSpace,
PMM_ALTER_REGION_FUNC AlterFunc)
{
PMM_REGION NewRegion1;
PMM_REGION NewRegion2;
ULONG InternalLength;
/* Allocate this in front otherwise the failure case is too difficult. */
NewRegion2 = ExAllocatePoolWithTag(NonPagedPool, sizeof(MM_REGION),
TAG_MM_REGION);
if (NewRegion2 == NULL)
{
return(NULL);
}
/* Create the new region. */
NewRegion1 = ExAllocatePoolWithTag(NonPagedPool, sizeof(MM_REGION),
TAG_MM_REGION);
if (NewRegion1 == NULL)
{
ExFreePool(NewRegion2);
return(NULL);
}
NewRegion1->Type = NewType;
NewRegion1->Protect = NewProtect;
InternalLength = (InitialBaseAddress + InitialRegion->Length) - StartAddress;
InternalLength = min(InternalLength, Length);
NewRegion1->Length = InternalLength;
InsertAfterEntry(&InitialRegion->RegionListEntry,
&NewRegion1->RegionListEntry);
/*
* Call our helper function to do the changes on the addresses contained
* in the initial region.
*/
AlterFunc(AddressSpace, StartAddress, InternalLength, InitialRegion->Type,
InitialRegion->Protect, NewType, NewProtect);
/*
* If necessary create a new region for the portion of the initial region
* beyond the range of addresses to alter.
*/
if ((InitialBaseAddress + InitialRegion->Length) > (StartAddress + Length))
{
NewRegion2->Type = InitialRegion->Type;
NewRegion2->Protect = InitialRegion->Protect;
NewRegion2->Length = (InitialBaseAddress + InitialRegion->Length) -
(StartAddress + Length);
InsertAfterEntry(&NewRegion1->RegionListEntry,
&NewRegion2->RegionListEntry);
}
else
{
ExFreePool(NewRegion2);
}
/* Either remove or shrink the initial region. */
if (InitialBaseAddress == StartAddress)
{
RemoveEntryList(&InitialRegion->RegionListEntry);
ExFreePool(InitialRegion);
}
else
{
InitialRegion->Length = StartAddress - InitialBaseAddress;
}
return(NewRegion1);
}
NTSTATUS
MmAlterRegion(PMADDRESS_SPACE AddressSpace, PVOID BaseAddress,
PLIST_ENTRY RegionListHead, PVOID StartAddress, ULONG Length,
ULONG NewType, ULONG NewProtect, PMM_ALTER_REGION_FUNC AlterFunc)
{
PMM_REGION InitialRegion;
PVOID InitialBaseAddress;
PMM_REGION NewRegion;
PLIST_ENTRY CurrentEntry;
PMM_REGION CurrentRegion;
PVOID CurrentBaseAddress;
ULONG RemainingLength;
/*
* Find the first region containing part of the range of addresses to
* be altered.
*/
InitialRegion = MmFindRegion(BaseAddress, RegionListHead, StartAddress,
&InitialBaseAddress);
if ((StartAddress + Length) >
(InitialBaseAddress + InitialRegion->Length))
{
RemainingLength = (StartAddress + Length) -
(InitialBaseAddress + InitialRegion->Length);
}
else
{
RemainingLength = 0;
}
/*
* If necessary then split the region into the affected and unaffected parts.
*/
if (InitialRegion->Type != NewType || InitialRegion->Protect != NewProtect)
{
NewRegion = MmSplitRegion(InitialRegion, InitialBaseAddress,
StartAddress, Length, NewType, NewProtect,
AddressSpace, AlterFunc);
if (NewRegion == NULL)
{
return(STATUS_NO_MEMORY);
}
}
else
{
NewRegion = InitialRegion;
}
/*
* Free any complete regions that are containing in the range of addresses
* and call the helper function to actually do the changes.
*/
CurrentEntry = NewRegion->RegionListEntry.Flink;
CurrentBaseAddress = StartAddress + NewRegion->Length;
while (RemainingLength > 0 && CurrentRegion->Length <= RemainingLength)
{
CurrentRegion = CONTAINING_RECORD(CurrentEntry, MM_REGION,
RegionListEntry);
CurrentEntry = CurrentEntry->Flink;
if (CurrentRegion->Type != NewType &&
CurrentRegion->Protect != NewProtect)
{
AlterFunc(AddressSpace, CurrentBaseAddress, CurrentRegion->Length,
CurrentRegion->Type, CurrentRegion->Protect,
NewType, NewProtect);
}
CurrentBaseAddress += CurrentRegion->Length;
NewRegion->Length += CurrentRegion->Length;
RemainingLength -= CurrentRegion->Length;
RemoveEntryList(&CurrentRegion->RegionListEntry);
ExFreePool(CurrentRegion);
}
/*
* Split any final region.
*/
if (RemainingLength > 0)
{
CurrentRegion = CONTAINING_RECORD(CurrentEntry, MM_REGION,
RegionListEntry);
if (CurrentRegion->Type != NewType &&
CurrentRegion->Protect != NewProtect)
{
AlterFunc(AddressSpace, CurrentBaseAddress, CurrentRegion->Length,
CurrentRegion->Type, CurrentRegion->Protect,
NewType, NewProtect);
}
NewRegion->Length += RemainingLength;
CurrentRegion->Length -= RemainingLength;
}
/*
* If the region after the new region has the same type then merge them.
*/
if (NewRegion->RegionListEntry.Flink != RegionListHead)
{
CurrentEntry = NewRegion->RegionListEntry.Flink;
CurrentRegion = CONTAINING_RECORD(CurrentEntry, MM_REGION,
RegionListEntry);
if (CurrentRegion->Type == NewRegion->Type &&
CurrentRegion->Protect == NewRegion->Protect)
{
NewRegion->Length += CurrentRegion->Length;
RemoveEntryList(&CurrentRegion->RegionListEntry);
ExFreePool(CurrentRegion);
}
}
/*
* If the region before the new region has the same type then merge them.
*/
if (NewRegion->RegionListEntry.Blink != RegionListHead)
{
CurrentEntry = NewRegion->RegionListEntry.Blink;
CurrentRegion = CONTAINING_RECORD(CurrentEntry, MM_REGION,
RegionListEntry);
if (CurrentRegion->Type == NewRegion->Type &&
CurrentRegion->Protect == NewRegion->Protect)
{
NewRegion->Length += CurrentRegion->Length;
RemoveEntryList(&CurrentRegion->RegionListEntry);
ExFreePool(CurrentRegion);
}
}
return(STATUS_SUCCESS);
}
VOID
MmInitialiseRegion(PLIST_ENTRY RegionListHead, ULONG Length, ULONG Type,
ULONG Protect)
{
PMM_REGION Region;
Region = ExAllocatePoolWithTag(NonPagedPool, sizeof(MM_REGION),
TAG_MM_REGION);
Region->Type = Type;
Region->Protect = Protect;
Region->Length = Length;
InitializeListHead(RegionListHead);
InsertHeadList(RegionListHead, &Region->RegionListEntry);
}
PMM_REGION
MmFindRegion(PVOID BaseAddress, PLIST_ENTRY RegionListHead, PVOID Address,
PVOID* RegionBaseAddress)
{
PLIST_ENTRY current_entry;
PMM_REGION current;
PVOID StartAddress = BaseAddress;
current_entry = RegionListHead->Flink;
while (current_entry != RegionListHead)
{
current = CONTAINING_RECORD(current_entry, MM_REGION, RegionListEntry);
if (StartAddress <= Address &&
(StartAddress + current->Length) > Address)
{
if (RegionBaseAddress != NULL)
{
*RegionBaseAddress = StartAddress;
}
return(current);
}
current_entry = current_entry->Flink;
StartAddress += current->Length;
}
return(NULL);
}

4
reactos/ntoskrnl/mm/rmap.c
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: rmap.c,v 1.6 2002/06/04 15:26:57 dwelch Exp $
/* $Id: rmap.c,v 1.7 2002/08/10 16:41:19 dwelch Exp $
*
* COPYRIGHT: See COPYING in the top directory
* PROJECT: ReactOS kernel
@ -86,7 +86,7 @@ MmPageOutPhysicalAddress(PHYSICAL_ADDRESS PhysicalAddress)
MmLockAddressSpace(&Process->AddressSpace);
MemoryArea = MmOpenMemoryAreaByAddress(&Process->AddressSpace, Address);
Type = MemoryArea->Type;
if (Type == MEMORY_AREA_SECTION_VIEW_COMMIT)
if (Type == MEMORY_AREA_SECTION_VIEW)
{
Offset.QuadPart = (ULONG)((Address - (ULONG)MemoryArea->BaseAddress) +
MemoryArea->Data.SectionData.ViewOffset);

197
reactos/ntoskrnl/mm/section.c
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: section.c,v 1.87 2002/08/08 17:54:15 dwelch Exp $
/* $Id: section.c,v 1.88 2002/08/10 16:41:19 dwelch Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/mm/section.c
@ -36,6 +36,7 @@
#include <internal/pool.h>
#include <internal/cc.h>
#include <ddk/ntifs.h>
#include <ntos/minmax.h>
#define NDEBUG
#include <internal/debug.h>
@ -432,6 +433,7 @@ MmNotPresentFaultSectionView(PMADDRESS_SPACE AddressSpace,
ULONG Entry1;
ULONG Attributes;
PMM_PAGEOP PageOp;
PMM_REGION Region;
/*
* There is a window between taking the page fault and locking the
@ -456,6 +458,9 @@ MmNotPresentFaultSectionView(PMADDRESS_SPACE AddressSpace,
*/
Segment = MemoryArea->Data.SectionData.Segment;
Section = MemoryArea->Data.SectionData.Section;
Region = MmFindRegion(MemoryArea->BaseAddress,
&MemoryArea->Data.SectionData.RegionListHead,
Address, NULL);
MmLockSection(Section);
MmLockSectionSegment(Segment);
@ -591,7 +596,7 @@ MmNotPresentFaultSectionView(PMADDRESS_SPACE AddressSpace,
Status = MmCreateVirtualMapping(PsGetCurrentProcess(),
Address,
MemoryArea->Attributes,
Region->Protect,
Page,
FALSE);
while (Status == STATUS_NO_MEMORY)
@ -599,7 +604,7 @@ MmNotPresentFaultSectionView(PMADDRESS_SPACE AddressSpace,
MmUnlockAddressSpace(AddressSpace);
Status = MmCreateVirtualMapping(PsGetCurrentProcess(),
Address,
MemoryArea->Attributes,
Region->Protect,
Page,
TRUE);
MmLockAddressSpace(AddressSpace);
@ -646,7 +651,7 @@ MmNotPresentFaultSectionView(PMADDRESS_SPACE AddressSpace,
*/
Status = MmCreateVirtualMapping(PsGetCurrentProcess(),
Address,
MemoryArea->Attributes,
Region->Protect,
Offset,
FALSE);
/*
@ -689,7 +694,7 @@ MmNotPresentFaultSectionView(PMADDRESS_SPACE AddressSpace,
Status = MmCreateVirtualMapping(PsGetCurrentProcess(),
Address,
MemoryArea->Attributes,
Region->Protect,
Page,
FALSE);
MmInsertRmap(Page, PsGetCurrentProcess(),
@ -715,14 +720,14 @@ MmNotPresentFaultSectionView(PMADDRESS_SPACE AddressSpace,
* Check if this page needs to be mapped COW
*/
if ((Segment->WriteCopy || MemoryArea->Data.SectionData.WriteCopyView) &&
(MemoryArea->Attributes == PAGE_READWRITE ||
MemoryArea->Attributes == PAGE_EXECUTE_READWRITE))
(Region->Protect == PAGE_READWRITE ||
Region->Protect == PAGE_EXECUTE_READWRITE))
{
Attributes = PAGE_READONLY;
}
else
{
Attributes = MemoryArea->Attributes;
Attributes = Region->Protect;
}
/*
@ -971,6 +976,7 @@ MmAccessFaultSectionView(PMADDRESS_SPACE AddressSpace,
ULONG PAddress;
LARGE_INTEGER Offset;
PMM_PAGEOP PageOp;
PMM_REGION Region;
/*
* Check if the page has been paged out or has already been set readwrite
@ -993,6 +999,9 @@ MmAccessFaultSectionView(PMADDRESS_SPACE AddressSpace,
*/
Segment = MemoryArea->Data.SectionData.Segment;
Section = MemoryArea->Data.SectionData.Section;
Region = MmFindRegion(MemoryArea->BaseAddress,
&MemoryArea->Data.SectionData.RegionListHead,
Address, NULL);
MmLockSection(Section);
MmLockSectionSegment(Segment);
@ -1009,8 +1018,8 @@ MmAccessFaultSectionView(PMADDRESS_SPACE AddressSpace,
* Check if we are doing COW
*/
if (!((Segment->WriteCopy || MemoryArea->Data.SectionData.WriteCopyView) &&
(MemoryArea->Attributes == PAGE_READWRITE ||
MemoryArea->Attributes == PAGE_EXECUTE_READWRITE)))
(Region->Protect == PAGE_READWRITE ||
Region->Protect == PAGE_EXECUTE_READWRITE)))
{
MmUnlockSection(Section);
MmUnlockSectionSegment(Segment);
@ -1094,7 +1103,7 @@ MmAccessFaultSectionView(PMADDRESS_SPACE AddressSpace,
MmLockAddressSpace(AddressSpace);
Status = MmCreateVirtualMapping(PsGetCurrentProcess(),
Address,
MemoryArea->Attributes,
Region->Protect,
NewPage,
FALSE);
MmInsertRmap(NewPage, PsGetCurrentProcess(),
@ -1494,6 +1503,125 @@ MmPageOutSectionView(PMADDRESS_SPACE AddressSpace,
return(STATUS_SUCCESS);
}
VOID STATIC
MmAlterViewAttributes(PMADDRESS_SPACE AddressSpace,
PVOID BaseAddress,
ULONG RegionSize,
ULONG OldType,
ULONG OldProtect,
ULONG NewType,
ULONG NewProtect)
{
PMEMORY_AREA MemoryArea;
PMM_SECTION_SEGMENT Segment;
BOOL DoCOW = FALSE;
ULONG i;
MemoryArea = MmOpenMemoryAreaByAddress(AddressSpace, BaseAddress);
Segment = MemoryArea->Data.SectionData.Segment;
if ((Segment->WriteCopy || MemoryArea->Data.SectionData.WriteCopyView) &&
(NewProtect == PAGE_READWRITE || NewProtect == PAGE_EXECUTE_READWRITE))
{
DoCOW = TRUE;
}
if (OldProtect != NewProtect)
{
for (i = 0; i < (RegionSize / PAGESIZE); i++)
{
PVOID Address = BaseAddress + (i * PAGESIZE);
ULONG Protect = NewProtect;
/*
* If we doing COW for this segment then check if the page is
* already private.
*/
if (DoCOW && MmIsPagePresent(AddressSpace->Process, Address))
{
LARGE_INTEGER Offset;
ULONG Entry;
LARGE_INTEGER PhysicalAddress;
Offset.QuadPart =
(ULONG)(Address - (ULONG)MemoryArea->BaseAddress) +
MemoryArea->Data.SectionData.ViewOffset;
Entry = MmGetPageEntrySectionSegment(Segment, Offset.QuadPart);
PhysicalAddress =
MmGetPhysicalAddressForProcess(AddressSpace->Process, Address);
Protect = PAGE_READONLY;
if ((Segment->Characteristics & IMAGE_SECTION_CHAR_BSS ||
IS_SWAP_FROM_SSE(Entry) ||
(LONGLONG)PAGE_FROM_SSE(Entry) != PhysicalAddress.QuadPart))
{
Protect = NewProtect;
}
}
if (MmIsPagePresent(AddressSpace->Process, Address))
{
MmSetPageProtect(AddressSpace->Process, BaseAddress,
Protect);
}
}
}
}
NTSTATUS
MmProtectSectionView(PMADDRESS_SPACE AddressSpace,
PMEMORY_AREA MemoryArea,
PVOID BaseAddress,
ULONG Length,
ULONG Protect,
PULONG OldProtect)
{
PMM_REGION Region;
NTSTATUS Status;
Length = min(Length, MemoryArea->Length);
Region = MmFindRegion(MemoryArea->BaseAddress,
&MemoryArea->Data.SectionData.RegionListHead,
BaseAddress, NULL);
*OldProtect = Region->Protect;
Status = MmAlterRegion(AddressSpace, MemoryArea->BaseAddress,
&MemoryArea->Data.SectionData.RegionListHead,
BaseAddress, Length, Region->Type, Protect,
MmAlterViewAttributes);
return(Status);
}
NTSTATUS STDCALL
MmQuerySectionView(PMEMORY_AREA MemoryArea,
PVOID Address,
PMEMORY_BASIC_INFORMATION Info,
PULONG ResultLength)
{
PMM_REGION Region;
PVOID RegionBaseAddress;
Region = MmFindRegion(MemoryArea->BaseAddress,
&MemoryArea->Data.SectionData.RegionListHead,
Address, &RegionBaseAddress);
Info->BaseAddress = (PVOID)PAGE_ROUND_DOWN(Address);
Info->AllocationBase = MemoryArea->BaseAddress;
Info->AllocationProtect = MemoryArea->Attributes;
Info->RegionSize = MemoryArea->Length;
Info->State = MEM_COMMIT;
Info->Protect = Region->Protect;
if (MemoryArea->Data.SectionData.Section->Flags & MM_IMAGE_SECTION)
{
Info->Type = MEM_IMAGE;
}
else
{
Info->Type = MEM_MAPPED;
}
return(STATUS_SUCCESS);
}
VOID STDCALL
MmpDeleteSection(PVOID ObjectBody)
{
@ -2187,6 +2315,7 @@ MmCreateImageSection(PHANDLE SectionHandle,
{
ULONG i;
ULONG Size;
ULONG Characteristics;
Size = sizeof(MM_IMAGE_SECTION_OBJECT) +
(sizeof(MM_SECTION_SEGMENT) * NrSegments);
@ -2226,27 +2355,27 @@ MmCreateImageSection(PHANDLE SectionHandle,
/*
* Set up the protection and write copy variables.
*/
if ((ImageSections[i-1].Characteristics & IMAGE_SECTION_CHAR_READABLE) ||
(ImageSections[i-1].Characteristics & IMAGE_SECTION_CHAR_WRITABLE) ||
(ImageSections[i-1].Characteristics & IMAGE_SECTION_CHAR_EXECUTABLE))
Characteristics = ImageSections[i - 1].Characteristics;
if ((Characteristics & IMAGE_SECTION_CHAR_READABLE) ||
(Characteristics & IMAGE_SECTION_CHAR_WRITABLE) ||
(Characteristics & IMAGE_SECTION_CHAR_EXECUTABLE))
{
SectionSegments[i].Protection =
SectionCharacteristicsToProtect[ImageSections[i-1].Characteristics >> 28];
SectionCharacteristicsToProtect[Characteristics >> 28];
SectionSegments[i].WriteCopy =
!(ImageSections[i - 1].Characteristics & IMAGE_SECTION_CHAR_SHARED);
!(Characteristics & IMAGE_SECTION_CHAR_SHARED);
}
else if (ImageSections[i-1].Characteristics & IMAGE_SECTION_CHAR_CODE)
else if (Characteristics & IMAGE_SECTION_CHAR_CODE)
{
SectionSegments[i].Protection = PAGE_EXECUTE_READ;
SectionSegments[i].WriteCopy = TRUE;
}
else if (ImageSections[i-1].Characteristics &
IMAGE_SECTION_CHAR_DATA)
else if (Characteristics & IMAGE_SECTION_CHAR_DATA)
{
SectionSegments[i].Protection = PAGE_READWRITE;
SectionSegments[i].WriteCopy = TRUE;
}
else if (ImageSections[i-1].Characteristics & IMAGE_SECTION_CHAR_BSS)
else if (Characteristics & IMAGE_SECTION_CHAR_BSS)
{
SectionSegments[i].Protection = PAGE_READWRITE;
SectionSegments[i].WriteCopy = TRUE;
@ -2260,15 +2389,15 @@ MmCreateImageSection(PHANDLE SectionHandle,
/*
* Set up the attributes.
*/
if (ImageSections[i-1].Characteristics & IMAGE_SECTION_CHAR_CODE)
if (Characteristics & IMAGE_SECTION_CHAR_CODE)
{
SectionSegments[i].Attributes = 0;
}
else if (ImageSections[i-1].Characteristics & IMAGE_SECTION_CHAR_DATA)
else if (Characteristics & IMAGE_SECTION_CHAR_DATA)
{
SectionSegments[i].Attributes = 0;
}
else if (ImageSections[i-1].Characteristics & IMAGE_SECTION_CHAR_BSS)
else if (Characteristics & IMAGE_SECTION_CHAR_BSS)
{
SectionSegments[i].Attributes = MM_SECTION_SEGMENT_BSS;
}
@ -2409,14 +2538,9 @@ MmMapViewOfSegment(PEPROCESS Process,
NTSTATUS Status;
KIRQL oldIrql;
if (Protect == PAGE_NOACCESS || Protect == PAGE_GUARD)
{
DPRINT1("Mapping inaccessible region between 0x%.8X and 0x%.8X\n",
(*BaseAddress), (*BaseAddress) + ViewSize);
}
Status = MmCreateMemoryArea(Process,
&Process->AddressSpace,
MEMORY_AREA_SECTION_VIEW_COMMIT,
MEMORY_AREA_SECTION_VIEW,
BaseAddress,
ViewSize,
Protect,
@ -2442,6 +2566,8 @@ MmMapViewOfSegment(PEPROCESS Process,
MArea->Data.SectionData.Section = Section;
MArea->Data.SectionData.ViewOffset = ViewOffset;
MArea->Data.SectionData.WriteCopyView = FALSE;
MmInitialiseRegion(&MArea->Data.SectionData.RegionListHead,
ViewSize, 0, Protect);
return(STATUS_SUCCESS);
}
@ -2612,6 +2738,8 @@ MmUnmapViewOfSection(PEPROCESS Process,
PSECTION_OBJECT Section;
PMM_SECTION_SEGMENT Segment;
KIRQL oldIrql;
PLIST_ENTRY CurrentEntry;
PMM_REGION CurrentRegion;
AddressSpace = &Process->AddressSpace;
@ -2632,6 +2760,16 @@ MmUnmapViewOfSection(PEPROCESS Process,
KeAcquireSpinLock(&Section->ViewListLock, &oldIrql);
RemoveEntryList(&MemoryArea->Data.SectionData.ViewListEntry);
KeReleaseSpinLock(&Section->ViewListLock, oldIrql);
CurrentEntry = MemoryArea->Data.SectionData.RegionListHead.Flink;
while (CurrentEntry != &MemoryArea->Data.SectionData.RegionListHead)
{
CurrentRegion =
CONTAINING_RECORD(CurrentEntry, MM_REGION, RegionListEntry);
CurrentEntry = CurrentEntry->Flink;
ExFreePool(CurrentRegion);
}
if (MemoryArea->Data.SectionData.Section->Flags & SO_PHYSICAL_MEMORY)
{
Status = MmFreeMemoryArea(&Process->AddressSpace,
@ -3030,7 +3168,6 @@ MmMapViewOfSection(IN PVOID SectionObject,
return(STATUS_SUCCESS);
}
BOOLEAN STDCALL
MmCanFileBeTruncated (IN PSECTION_OBJECT_POINTERS SectionObjectPointer,
IN PLARGE_INTEGER NewFileSize)

1463
reactos/ntoskrnl/mm/virtual.c
View file

File diff suppressed because it is too large Load diff

13
reactos/ntoskrnl/rtl/seh.c
View file

@ -62,6 +62,19 @@ extern DWORD CDECL SEHFilterRoutine(VOID);
extern VOID CDECL SEHHandlerRoutine(VOID);
#endif
DWORD CDECL SEHFilterRoutine(VOID)
{
DbgPrint("Within filter routine.\n");
return EXCEPTION_EXECUTE_HANDLER;
//return EXCEPTION_CONTINUE_EXECUTION;
}
VOID CDECL SEHHandlerRoutine(VOID)
{
DbgPrint("Within exception handler.\n");
DbgPrint("System halted.\n");
for (;;);
}
EXCEPTION_DISPOSITION
CDECL

3
reactos/test.commit
View file

@ -1,3 +0,0 @@
this file added to test commit mailer