Initial commit

Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>

casadm/safeclib/memmove_s.c

@@ -0,0 +1,148 @@
+/*------------------------------------------------------------------
+ * memmove_s.c
+ *
+ * October 2008, Bo Berry
+ *
+ * Copyright (c) 2008-2011 Cisco Systems
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *------------------------------------------------------------------
+ */
+
+#include "safeclib_private.h"
+#include "safe_mem_constraint.h"
+#include "mem_primitives_lib.h"
+#include "safe_mem_lib.h"
+
+/**
+ * NAME
+ *    memmove_s
+ *
+ * SYNOPSIS
+ *    #include "safe_mem_lib.h"
+ *    errno_t
+ *    memmove_s(void *dest, rsize_t dmax,
+ *              const void *src, rsize_t smax)
+ *
+ * DESCRIPTION
+ *    The memmove_s function copies smax bytes from the region pointed
+ *    to by src into the region pointed to by dest. This copying takes place
+ *    as if the smax bytes from the region pointed to by src are first copied
+ *    into a temporary array of smax bytes that does not overlap the region
+ *    pointed to by dest or src, and then the smax bytes from the temporary
+ *    array are copied into the object region to by dest.
+ *
+ * SPECIFIED IN
+ *    ISO/IEC TR 24731, Programming languages, environments
+ *    and system software interfaces, Extensions to the C Library,
+ *    Part I: Bounds-checking interfaces
+ *
+ * INPUT PARAMETERS
+ *    dest       pointer to the memory that will be replaced by src.
+ *
+ *    dmax       maximum length of the resulting dest, in bytes
+ *
+ *    src        pointer to the memory that will be copied
+ *                to dest
+ *
+ *    smax       maximum number bytes of src that can be copied
+ *
+ *  OUTPUT PARAMETERS
+ *    dest      is updated
+ *
+ * RUNTIME CONSTRAINTS
+ *    Neither dest nor src shall be a null pointer.
+ *    Neither dmax nor smax shall be 0.
+ *    dmax shall not be greater than RSIZE_MAX_MEM.
+ *    smax shall not be greater than dmax.
+ *    If there is a runtime-constraint violation, the memmove_s function
+ *      stores zeros in the first dmax characters of the regionpointed to
+ *      by dest if dest is not a null pointer and dmax is not greater
+ *      than RSIZE_MAX_MEM.
+ *
+ * RETURN VALUE
+ *    EOK        successful operation
+ *    ESNULLP    NULL pointer
+ *    ESZEROL    zero length
+ *    ESLEMAX    length exceeds max limit
+ *
+ * ALSO SEE
+ *    memmove16_s(), memmove32_s(), memcpy_s(), memcpy16_s() memcpy32_s()
+ *
+ */
+errno_t
+memmove_s (void *dest, rsize_t dmax, const void *src, rsize_t smax)
+{
+    uint8_t *dp;
+    const uint8_t  *sp;
+
+    dp= dest;
+    sp = src;
+
+    if (dp == NULL) {
+        invoke_safe_mem_constraint_handler("memmove_s: dest is null",
+                   NULL, ESNULLP);
+        return (RCNEGATE(ESNULLP));
+    }
+
+    if (dmax == 0) {
+        invoke_safe_mem_constraint_handler("memmove_s: dmax is 0",
+                   NULL, ESZEROL);
+        return (RCNEGATE(ESZEROL));
+    }
+
+    if (dmax > RSIZE_MAX_MEM) {
+        invoke_safe_mem_constraint_handler("memmove_s: dmax exceeds max",
+                   NULL, ESLEMAX);
+        return (RCNEGATE(ESLEMAX));
+    }
+
+    if (smax == 0) {
+        mem_prim_set(dp, dmax, 0);
+        invoke_safe_mem_constraint_handler("memmove_s: smax is 0",
+                   NULL, ESZEROL);
+        return (RCNEGATE(ESZEROL));
+    }
+
+    if (smax > dmax) {
+        mem_prim_set(dp, dmax, 0);
+        invoke_safe_mem_constraint_handler("memmove_s: smax exceeds max",
+                   NULL, ESLEMAX);
+        return (RCNEGATE(ESLEMAX));
+    }
+
+    if (sp == NULL) {
+        mem_prim_set(dp, dmax, 0);
+        invoke_safe_mem_constraint_handler("memmove_s: src is null",
+                   NULL, ESNULLP);
+        return (RCNEGATE(ESNULLP));
+    }
+
+    /*
+     * now perform the copy
+     */
+    mem_prim_move(dp, sp, smax);
+
+    return (RCNEGATE(EOK));
+}
+EXPORT_SYMBOL(memmove_s);