[sginsberg] 35821: - Add SecureZeroMemory/RtlSecureZeroMemory - Add x86 versions of PreFetchCacheLine and MemoryBarrier (TODO for other architectures)

Author: sginsberg
Date: Sat Aug 30 17:54:27 2008
New Revision: 35821

URL: http://svn.reactos.org/svn/reactos?rev=35821&view=rev
Log:
- Add SecureZeroMemory/RtlSecureZeroMemory
- Add x86 versions of PreFetchCacheLine and MemoryBarrier (TODO for other architectures)

Modified:
    trunk/reactos/include/psdk/winbase.h
    trunk/reactos/include/psdk/winnt.h

Modified: trunk/reactos/include/psdk/winbase.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/include/psdk/winbase.h?rev=...
==============================================================================
--- trunk/reactos/include/psdk/winbase.h [iso-8859-1] (original)
+++ trunk/reactos/include/psdk/winbase.h [iso-8859-1] Sat Aug 30 17:54:27 2008
@@ -1208,6 +1208,7 @@
 #define CopyMemory RtlCopyMemory
 #define FillMemory RtlFillMemory
 #define ZeroMemory RtlZeroMemory
+#define SecureZeroMemory RtlSecureZeroMemory
 BOOL WINAPI CopySid(DWORD,PSID,PSID);
 #if (_WIN32_WINNT >= 0x0501)
 HANDLE WINAPI CreateActCtxA(PCACTCTXA);

Modified: trunk/reactos/include/psdk/winnt.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/include/psdk/winnt.h?rev=35...
==============================================================================
--- trunk/reactos/include/psdk/winnt.h [iso-8859-1] (original)
+++ trunk/reactos/include/psdk/winnt.h [iso-8859-1] Sat Aug 30 17:54:27 2008
@@ -4453,6 +4453,23 @@
 #define RtlFillMemory(d,l,f) memset((d), (f), (l))
 #define RtlZeroMemory(d,l) RtlFillMemory((d),(l),0)

+FORCEINLINE
+PVOID
+RtlSecureZeroMemory(IN PVOID ptr,
+                    IN SIZE_T cnt)
+{
+    volatile char *vptr = (volatile char *)ptr;
+
+    while (cnt)
+    {
+        *vptr = 0;
+        vptr++;
+        cnt--;
+    }
+
+    return ptr;
+}
+
 typedef struct _OBJECT_TYPE_LIST {
     WORD   Level;
     WORD   Sbz;
@@ -4656,6 +4673,43 @@

#endif

+/* TODO: Other architectures than X86 */
+#if defined(_M_IX86)
+#define PF_TEMPORAL_LEVEL_1 
+#define PF_NON_TEMPORAL_LEVEL_ALL
+#define PreFetchCacheLine(l, a)
+#elif defined (_M_AMD64)
+#define PreFetchCacheLine(l, a)
+#elif defined(_M_PPC)
+#define PreFetchCacheLine(l, a)
+#elif defined(_M_ARM)
+#define PreFetchCacheLine(l, a)
+#else
+#error Unknown architecture
+#endif
+
+/* TODO: Other architectures than X86 */
+#if defined(_M_IX86)
+FORCEINLINE
+VOID
+MemoryBarrier(VOID)
+{
+    LONG Barrier;
+    __asm__ __volatile__
+    {
+        xchg Barrier, eax
+    }
+}
+#elif defined (_M_AMD64)
+#define MemoryBarrier()
+#elif defined(_M_PPC)
+#define MemoryBarrier()
+#elif defined(_M_ARM)
+#define MemoryBarrier()
+#else
+#error Unknown architecture
+#endif
+
 #if defined(_M_IX86)
 #define YieldProcessor() __asm__ __volatile__("pause");
 #elif defined (_M_AMD64)