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- Returned more of the protection bits in MmGetPageProtect.

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- Ignore the PAGE_SYSTEM attribute and set the user bit according to the
  given address in MmSetPageProtect and MmCreateVirtualMappingUnsafe.
- Don't change the accessed and dirty bit in MmSetPageProtect.

svn path=/trunk/; revision=10485
This commit is contained in:
Hartmut Birr 2004-08-10 19:57:58 +00:00
parent a91173016c
commit 2a373c783c
1 changed files with 42 additions and 12 deletions
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54
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 1.67 2004/08/01 07:27:25 hbirr Exp $
/* $Id: page.c,v 1.68 2004/08/10 19:57:58 hbirr Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/mm/i386/page.c
@ -54,7 +54,6 @@
#define PA_WT (1 << PA_BIT_WT)
#define PA_CD (1 << PA_BIT_CD)
#define PA_ACCESSED (1 << PA_BIT_ACCESSED)
#define PA_DIRTY (1 << PA_BIT_DIRTY)
#define PAGETABLE_MAP (0xf0000000)
#define PAGEDIRECTORY_MAP (0xf0000000 + (PAGETABLE_MAP / (1024)))
@ -254,7 +253,7 @@ VOID MmFreePageTable(PEPROCESS Process, PVOID Address)
}
}
PULONG MmGetPageEntry(PVOID PAddress, BOOL CreatePde)
static PULONG MmGetPageEntry(PVOID PAddress, BOOL CreatePde)
/*
* FUNCTION: Get a pointer to the page table entry for a virtual address
*/
@ -325,7 +324,7 @@ PULONG MmGetPageEntry(PVOID PAddress, BOOL CreatePde)
return (PULONG)ADDR_TO_PTE(PAddress);
}
ULONG MmGetPageEntryForProcess(PEPROCESS Process, PVOID Address)
static ULONG MmGetPageEntryForProcess(PEPROCESS Process, PVOID Address)
{
PULONG Pte;
ULONG oldPte;
@ -945,10 +944,17 @@ MmCreateVirtualMappingUnsafe(PEPROCESS Process,
}
Attributes = ProtectToPTE(flProtect);
if (Address >= (PVOID)KERNEL_BASE)
{
Attributes &= ~PA_USER;
}
else
{
Attributes |= PA_USER;
}
if (Process != NULL && Process != CurrentProcess)
{
CHECKPOINT1;
KeAttachProcess(Process);
}
@ -1036,13 +1042,29 @@ MmGetPageProtect(PEPROCESS Process, PVOID Address)
{
Protect = PAGE_NOACCESS;
}
else if (Entry & PA_READWRITE)
else
{
Protect = PAGE_READWRITE;
}
else
{
Protect = PAGE_EXECUTE_READ;
if (Entry & PA_READWRITE)
{
Protect = PAGE_READWRITE;
}
else
{
Protect = PAGE_EXECUTE_READ;
}
if (Entry & PA_CD)
{
Protect |= PAGE_NOCACHE;
}
if (Entry & PA_WT)
{
Protect |= PAGE_WRITETHROUGH;
}
if (!(Entry & PA_USER))
{
Protect |= PAGE_SYSTEM;
}
}
return(Protect);
}
@ -1058,6 +1080,14 @@ MmSetPageProtect(PEPROCESS Process, PVOID Address, ULONG flProtect)
Process, Address, flProtect);
Attributes = ProtectToPTE(flProtect);
if (Address >= (PVOID)KERNEL_BASE)
{
Attributes &= ~PA_USER;
}
else
{
Attributes |= PA_USER;
}
if (Process != NULL && Process != CurrentProcess)
{
KeAttachProcess(Process);
@ -1067,7 +1097,7 @@ MmSetPageProtect(PEPROCESS Process, PVOID Address, ULONG flProtect)
{
KEBUGCHECK(0);
}
*Pte = PAGE_MASK(*Pte) | Attributes;
*Pte = PAGE_MASK(*Pte) | Attributes | (*Pte & (PA_ACCESSED|PA_DIRTY));
FLUSH_TLB_ONE(Address);
if (Process != NULL && Process != CurrentProcess)
{