[greatlrd] 24273: fixed overlaping memory problem with RtlMoveMemory. The rewrite of RtlMoveMemory did not handling overlaping memory. it shows with ntdll_winetest rtl, use the old asm version from the string.a instead

Author: greatlrd
Date: Tue Sep 26 03:46:32 2006
New Revision: 24273

URL: http://svn.reactos.org/svn/reactos?rev=24273&view=rev
Log:
fixed overlaping memory problem with RtlMoveMemory. The rewrite of RtlMoveMemory did not handling overlaping memory. it shows with ntdll_winetest rtl, use the old asm version from the string.a instead

Added:
    trunk/reactos/lib/rtl/RtlMoveMemory.c   (with props)
Modified:
    trunk/reactos/lib/rtl/i386/rtlmem.s
    trunk/reactos/lib/rtl/rtl.rbuild

Added: trunk/reactos/lib/rtl/RtlMoveMemory.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/lib/rtl/RtlMoveMemory.c?rev...
==============================================================================
--- trunk/reactos/lib/rtl/RtlMoveMemory.c (added)
+++ trunk/reactos/lib/rtl/RtlMoveMemory.c Tue Sep 26 03:46:32 2006
@@ -1,0 +1,23 @@
+#include <rtl.h>
+
+#define NDEBUG
+#include <debug.h>
+
+#undef RtlMoveMemory
+/*
+ * @implemented
+ */
+VOID
+NTAPI
+RtlMoveMemory (
+   PVOID    Destination,
+   CONST VOID  * Source,
+   ULONG    Length
+)
+{
+   memmove (
+      Destination,
+      Source,
+      Length
+   );
+}

Propchange: trunk/reactos/lib/rtl/RtlMoveMemory.c
------------------------------------------------------------------------------
    svn:eol-style = native

Modified: trunk/reactos/lib/rtl/i386/rtlmem.s
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/lib/rtl/i386/rtlmem.s?rev=2...
==============================================================================
--- trunk/reactos/lib/rtl/i386/rtlmem.s (original)
+++ trunk/reactos/lib/rtl/i386/rtlmem.s Tue Sep 26 03:46:32 2006
@@ -214,73 +214,6 @@
     ret 8
 .endfunc

-.func RtlMoveMemory@12
-_RtlMoveMemory@12:
-
-    /* Save volatiles */
-    push esi
-    push edi
-
-    /* Get pointers and size  */
-    mov esi, [esp+16]
-    mov edi, [esp+12]
-    mov ecx, [esp+20]
-    cld
-
-    /* Check if the destination is higher (or equal) */
-    cmp esi, edi
-    jbe Overlap
-
-    /* Set ULONG size and UCHAR remainder */
-DoMove:
-    mov edx, ecx
-    and edx, 3
-    shr ecx, 2
-
-    /* Do the move */
-    rep movsd
-    or ecx, edx
-    jnz ByteMove
-
-    /* Return */
-    pop edi
-    pop esi
-    ret 12
-
-ByteMove:
-    /* Move what's left */
-    rep stosb
-
-DoneMove:
-    /* Restore volatiles */
-    pop edi
-    pop esi
-    ret 12
-
-Overlap:
-    /* Don't copy if they're equal */
-    jz DoneMove
-
-    /* Compare pointer distance with given length and check for overlap */
-    mov eax, edi
-    sub eax, esi
-    cmp ecx, eax
-    jbe DoMove
-
-    /* Set direction flag for backward move */
-    std
-
-    /* Copy byte-by-byte the non-overlapping distance */
-    add esi, ecx
-    add edi, ecx
-    dec esi
-    dec edi
-
-    /* Do the move, reset flag and return */
-    rep movsb
-    cld
-    jmp DoneMove
-.endfunc

.func @RtlPrefetchMemoryNonTemporal@8, @RtlPrefetchMemoryNonTemporal@8
 @RtlPrefetchMemoryNonTemporal@8:

Modified: trunk/reactos/lib/rtl/rtl.rbuild
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/lib/rtl/rtl.rbuild?rev=2427...
==============================================================================
--- trunk/reactos/lib/rtl/rtl.rbuild (original)
+++ trunk/reactos/lib/rtl/rtl.rbuild Tue Sep 26 03:46:32 2006
@@ -39,6 +39,7 @@
    		<file>sqrt_asm.s</file>
    		<file>tan_asm.s</file>
    	</directory>
+            <file>RtlMoveMemory.c</file>
    </if>

<ifnot property="ARCH" value="i386">