[ros-diffs] [tkreuzer] 47583: [WIN32K] Implement EngCreateSection, EngMapSection, EngFreeSectionMem, EngAllocSectionMem, EngLoadModuleEx, EngLoadModule, EngLoadModuleForWrite, EngMapModule, EngFreeModule, EngMapFile, EngUnmapFile. Unused & untested.

Author: tkreuzer
Date: Sat Jun  5 06:34:12 2010
New Revision: 47583

URL: http://svn.reactos.org/svn/reactos?rev=47583&view=rev
Log:
[WIN32K]
Implement EngCreateSection, EngMapSection, EngFreeSectionMem, EngAllocSectionMem,
EngLoadModuleEx, EngLoadModule, EngLoadModuleForWrite, EngMapModule, EngFreeModule,
EngMapFile, EngUnmapFile. Unused & untested.

Modified:
    branches/reactos-yarotows/subsystems/win32/win32k/eng/mapping.c

Modified: branches/reactos-yarotows/subsystems/win32/win32k/eng/mapping.c
URL:
http://svn.reactos.org/svn/reactos/branches/reactos-yarotows/subsystems/win…
==============================================================================
--- branches/reactos-yarotows/subsystems/win32/win32k/eng/mapping.c [iso-8859-1]
(original)
+++ branches/reactos-yarotows/subsystems/win32/win32k/eng/mapping.c [iso-8859-1] Sat Jun 
5 06:34:12 2010
@@ -3,7 +3,7 @@
  * PROJECT:           ReactOS kernel
  * PURPOSE:           Functions for mapping files and sections
  * FILE:              subsys/win32k/eng/device.c
- * PROGRAMER:
+ * PROGRAMER:         Timo Kreuzer (timo.kreuzer(a)reactos.org)
  */
 
 #include <win32k.h>
@@ -11,12 +11,314 @@
 #define NDEBUG
 #include <debug.h>
 
+// HACK!!!
+#define MmMapViewInSessionSpace MmMapViewInSystemSpace
+#define MmUnmapViewInSessionSpace MmUnmapViewInSystemSpace
+
+typedef struct _ENGSECTION
+{
+    PVOID pvSectionObject;
+    PVOID pvMappedBase;
+    SIZE_T cjViewSize;
+    ULONG ulTag;
+} ENGSECTION, *PENGSECTION;
+
+typedef struct _FILEVIEW
+{
+    ULARGE_INTEGER LastWriteTime;  
+    PVOID          pvKView;
+    PVOID          pvViewFD;  
+    ULONG          cjView;  
+    PVOID          pSection;  
+} FILEVIEW, *PFILEVIEW;   
+
+typedef struct _FONTFILEVIEW 
+{
+    FILEVIEW;
+    DWORD          reserved[2];
+    PWSTR          pwszPath;
+    SIZE_T         ulRegionSize;
+    ULONG          cKRefCount;
+    ULONG          cRefCountFD;
+    PVOID          pvSpoolerBase;
+    DWORD          dwSpoolerPid;
+} FONTFILEVIEW, *PFONTFILEVIEW;
+
+enum
+{
+    FVF_SYSTEMROOT = 1,
+    FVF_READONLY = 2,
+    FVF_FONTFILE = 4,
+};
+
+HANDLE ghSystem32Directory;
+HANDLE ghRootDirectory;
+
+
+PVOID
+NTAPI
+EngCreateSection(
+    IN ULONG fl,
+    IN SIZE_T cjSize,
+    HANDLE hFile,
+    IN ULONG ulTag)
+{
+    NTSTATUS Status;
+    PENGSECTION pSection;
+    PVOID pvSectionObject;
+    LARGE_INTEGER liSize;
+
+    /* Allocate a section object */
+    pSection = EngAllocMem(0, sizeof(ENGSECTION), 'stsU');
+    if (!pSection) return NULL;
+
+    liSize.QuadPart = cjSize;
+    Status = MmCreateSection(&pvSectionObject,
+                             SECTION_ALL_ACCESS,
+                             NULL,
+                             &liSize,
+                             PAGE_READWRITE,
+                             SEC_COMMIT,
+                             hFile,
+                             NULL);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("Failed to create a section Status=0x%x\n", Status);
+        EngFreeMem(pSection);
+        return NULL;
+    }
+
+    /* Set the fields of the section */
+    pSection->ulTag = ulTag;
+    pSection->pvSectionObject = pvSectionObject;
+    pSection->pvMappedBase = NULL;
+    pSection->cjViewSize = cjSize;
+
+    return pSection;
+}
+
+
+BOOL
+APIENTRY
+EngMapSection(
+    IN PVOID pvSection,
+    IN BOOL bMap,
+    IN HANDLE hProcess,
+    OUT PVOID* pvBaseAddress)
+{
+    NTSTATUS Status;
+    PENGSECTION pSection = pvSection;
+    PEPROCESS pepProcess;
+
+    /* Get a pointer to the process */
+    Status = ObReferenceObjectByHandle(hProcess,
+                                       PROCESS_VM_OPERATION,
+                                       NULL,
+                                       KernelMode,
+                                       (PVOID*)&pepProcess,
+                                       NULL);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("Could not access process %p, Status=0x%lx\n", hProcess,
Status);
+        return FALSE;
+    }
+
+    if (bMap)
+    {
+        /* Make sure the section isn't already mapped */
+        ASSERT(pSection->pvMappedBase == NULL);
+
+        /* Map the section into the process address space */
+        Status = MmMapViewOfSection(pSection->pvSectionObject,
+                                    pepProcess,
+                                    &pSection->pvMappedBase,
+                                    0,
+                                    pSection->cjViewSize,
+                                    NULL,
+                                    &pSection->cjViewSize,
+                                    0,
+                                    0,
+                                    PAGE_READWRITE);
+        if (!NT_SUCCESS(Status))
+        {
+            DPRINT1("Failed to map a section Status=0x%x\n", Status);
+        }
+    }
+    else
+    {
+        /* Make sure the section is mapped */
+        ASSERT(pSection->pvMappedBase);
+
+        /* Unmap the section from the process address space */
+        Status = MmUnmapViewOfSection(pepProcess, pSection->pvMappedBase);
+        if (NT_SUCCESS(Status))
+        {
+            pSection->pvMappedBase = NULL;
+        }
+        else
+        {
+            DPRINT1("Failed to unmap a section @ &p Status=0x%x\n", 
+                    pSection->pvMappedBase, Status);
+        }
+    }
+
+    /* Dereference the process */
+    ObDereferenceObject(pepProcess);
+
+    /* Set the new mapping base and return bool status */
+    *pvBaseAddress = pSection->pvMappedBase;
+    return NT_SUCCESS(Status);
+}
+
+BOOL
+APIENTRY
+EngFreeSectionMem(
+    IN PVOID pvSection OPTIONAL,
+    IN PVOID pvMappedBase OPTIONAL)
+{
+    NTSTATUS Status;
+    PENGSECTION pSection = pvSection;
+    BOOL bResult = TRUE;
+
+    /* Did the caller give us a mapping base? */
+    if (pvMappedBase)
+    {
+        Status = MmUnmapViewInSessionSpace(pvMappedBase);
+        if (!NT_SUCCESS(Status))
+        {
+            DPRINT1("MmUnmapViewInSessionSpace failed: 0x%lx\n", Status);
+            bResult = FALSE;
+        }
+    }
+
+    /* Check if we should free the section as well */
+    if (pSection)
+    {
+        /* Dereference the kernel section */
+        ObDereferenceObject(pSection->pvSectionObject);
+
+        /* Finally free the section memory itself */
+        EngFreeMem(pSection);
+    }
+
+    return bResult;
+}
+
+PVOID
+APIENTRY
+EngAllocSectionMem(
+    OUT PVOID *ppvSection,
+    IN ULONG fl,
+    IN SIZE_T cjSize,
+    IN ULONG ulTag)
+{
+    NTSTATUS Status;
+    PENGSECTION pSection;
+
+    /* Check parameter */
+    if (cjSize == 0) return NULL;
+
+    /* Allocate a section object */
+    pSection = EngCreateSection(fl, cjSize, NULL, ulTag);
+
+    /* Map the section in session space */
+    Status = MmMapViewInSessionSpace(pSection->pvSectionObject,
+                                     &pSection->pvMappedBase,
+                                     &pSection->cjViewSize);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("Failed to map a section Status=0x%x\n", Status);
+        *ppvSection = NULL;
+        EngFreeSectionMem(pSection, NULL);
+        return NULL;
+    }
+
+    /* Set section pointer and return base address */
+    *ppvSection = pSection;
+    return pSection->pvMappedBase;
+}
+
+
+PFILEVIEW
+NTAPI
+EngLoadModuleEx(
+    LPWSTR pwsz,
+    ULONG cjSizeOfModule,
+    FLONG fl)
+{
+    PFILEVIEW pFileView = NULL;
+    OBJECT_ATTRIBUTES ObjectAttributes;
+    HANDLE hRootDir;
+    UNICODE_STRING ustrFileName;
+    IO_STATUS_BLOCK IoStatusBlock;
+    HANDLE hFile;
+    NTSTATUS Status;
+
+    if (fl & FVF_FONTFILE)
+    {
+        pFileView = EngAllocMem(0, sizeof(FONTFILEVIEW), 'vffG');
+    }
+    else
+    {
+        pFileView = EngAllocMem(0, sizeof(FILEVIEW), 'liFg');
+    }
+
+    /* Check for success */
+    if (!pFileView) return NULL;
+
+    /* Check if the file is relative to system32 */
+    if (fl & FVF_SYSTEMROOT)
+    {
+        hRootDir = ghSystem32Directory;
+    }
+    else
+    {
+        hRootDir = ghRootDirectory;
+    }
+
+    /* Initialize unicode string and object attributes */
+    RtlInitUnicodeString(&ustrFileName, pwsz);
+    InitializeObjectAttributes(&ObjectAttributes,
+                               &ustrFileName,
+                               OBJ_CASE_INSENSITIVE|OBJ_KERNEL_HANDLE,
+                               hRootDir,
+                               NULL);
+
+    /* Now open the file */
+    Status = ZwCreateFile(&hFile,
+                          FILE_READ_DATA,
+                          &ObjectAttributes,
+                          &IoStatusBlock,
+                          NULL,
+                          FILE_ATTRIBUTE_NORMAL,
+                          0,
+                          FILE_OPEN,
+                          FILE_NON_DIRECTORY_FILE,
+                          NULL,
+                          0);
+
+    /* Check for auto size */
+    if (cjSizeOfModule == 0)
+    {
+    }
+
+    /* Allocate a section object */
+    pFileView->pSection = EngCreateSection(fl, cjSizeOfModule, hFile,
'1234');
+
+    /* Close the file handle */
+    ZwClose(hFile);
+
+    pFileView->cjView = cjSizeOfModule;
+
+    return pFileView;
+}
+
 HANDLE
 APIENTRY
 EngLoadModule(LPWSTR pwsz)
 {
-    UNIMPLEMENTED;
-    return NULL;
+    /* Forward to EngLoadModuleEx */
+    return (HANDLE)EngLoadModuleEx(pwsz, 0, FVF_READONLY | FVF_SYSTEMROOT);
 }
 
 HANDLE
@@ -25,9 +327,8 @@
 	IN LPWSTR pwsz,
 	IN ULONG  cjSizeOfModule)
 {
-    // www.osr.com/ddk/graphics/gdifncs_98rr.htm
-    UNIMPLEMENTED;
-    return NULL;
+    /* Forward to EngLoadModuleEx */
+    return (HANDLE)EngLoadModuleEx(pwsz, cjSizeOfModule, FVF_SYSTEMROOT);
 }
 
 PVOID
@@ -36,17 +337,41 @@
 	IN  HANDLE h,
 	OUT PULONG pulSize)
 {
-    // www.osr.com/ddk/graphics/gdifncs_9b1j.htm
-    UNIMPLEMENTED;
-    return NULL;
+    PFILEVIEW pFileView = (PFILEVIEW)h;
+    PENGSECTION pSection = pFileView->pSection;
+    NTSTATUS Status;
+
+    /* Map the section in session space */
+    Status = MmMapViewInSessionSpace(pSection->pvSectionObject,
+                                     &pSection->pvMappedBase,
+                                     &pSection->cjViewSize);
+    if (NT_SUCCESS(Status))
+    {
+        *pulSize = pSection->cjViewSize;
+    }
+    else
+    {
+        DPRINT1("Failed to map a section Status=0x%x\n", Status);
+        *pulSize = 0;
+        EngFreeSectionMem(pSection, NULL);
+        return NULL;
+    }
+
+    return pSection->pvMappedBase;
 }
 
 VOID
 APIENTRY
-EngFreeModule (IN HANDLE h)
-{
-    // www.osr.com/ddk/graphics/gdifncs_9fzb.htm
-    UNIMPLEMENTED;
+EngFreeModule(IN HANDLE h)
+{
+    PFILEVIEW pFileView = (PFILEVIEW)h;
+    PENGSECTION pSection = pFileView->pSection;
+
+    /* Free the section */
+    EngFreeSectionMem(pSection, pSection->pvMappedBase);
+
+    /* Free the file view memory */
+    EngFreeMem(pFileView);
 }
 
 PVOID
@@ -56,8 +381,28 @@
     IN ULONG cjSize,
     OUT ULONG_PTR *piFile)
 {
-    UNIMPLEMENTED;
-    return NULL;
+    HANDLE hModule;
+    PVOID pvBase;
+
+    /* Load the file */
+    hModule = EngLoadModuleEx(pwsz, 0, 0);
+    if (!hModule)
+    {
+        *piFile = 0;
+        return NULL;
+    }
+
+    /* Map the file */
+    pvBase = EngMapModule(hModule, &cjSize);
+    if (!pvBase)
+    {
+        EngFreeModule(hModule);
+        hModule = NULL;
+    }
+
+    /* Set iFile and return mapped base */
+    *piFile = (ULONG_PTR)hModule;
+    return pvBase;
 }
 
 BOOL
@@ -65,8 +410,11 @@
 EngUnmapFile(
     IN ULONG_PTR iFile)
 {
-    UNIMPLEMENTED;
-    return FALSE;
+    HANDLE hModule = (HANDLE)iFile;
+
+    EngFreeModule(hModule);
+
+    return TRUE;
 }
 
 
@@ -110,36 +458,3 @@
     // www.osr.com/ddk/graphics/gdifncs_09wn.htm
     EngUnmapFontFileFD(iFile);
 }
-
-
-BOOLEAN
-APIENTRY
-EngMapSection(IN PVOID Section,
-              IN BOOLEAN Map,
-              IN HANDLE Process,
-              IN PVOID* BaseAddress)
-{
-    UNIMPLEMENTED;
-    return FALSE;
-}
-
-PVOID
-APIENTRY
-EngAllocSectionMem(IN PVOID SectionObject,
-                   IN ULONG Flags,
-                   IN SIZE_T MemSize,
-                   IN ULONG Tag)
-{
-    UNIMPLEMENTED;
-    return NULL;
-}
-
-
-BOOLEAN
-APIENTRY
-EngFreeSectionMem(IN PVOID SectionObject OPTIONAL,
-                  IN PVOID MappedBase)
-{
-    UNIMPLEMENTED;
-    return FALSE;
-}