safec  2.1
Safe C Library - ISO TR24731 Bounds Checking Interface
memzero32_s.c
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1 /*------------------------------------------------------------------
2  * memzero32_s - zeros memory
3  *
4  * October 2008, Bo Berry
5  *
6  * Copyright (c) 2008-2011 Cisco Systems
7  * All rights reserved.
8  *
9  * Permission is hereby granted, free of charge, to any person
10  * obtaining a copy of this software and associated documentation
11  * files (the "Software"), to deal in the Software without
12  * restriction, including without limitation the rights to use,
13  * copy, modify, merge, publish, distribute, sublicense, and/or
14  * sell copies of the Software, and to permit persons to whom the
15  * Software is furnished to do so, subject to the following
16  * conditions:
17  *
18  * The above copyright notice and this permission notice shall be
19  * included in all copies or substantial portions of the Software.
20  *
21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
23  * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
25  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
26  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
28  * OTHER DEALINGS IN THE SOFTWARE.
29  *------------------------------------------------------------------
30  */
31 
32 #include "safeclib_private.h"
33 #include "safe_mem_constraint.h"
34 #include "mem_primitives_lib.h"
35 #include "safe_mem_lib.h"
36 
37 
63 errno_t
64 memzero32_s (uint32_t *dest, rsize_t len)
65 {
66 
67  if (dest == NULL) {
68  invoke_safe_mem_constraint_handler("memzero32_s: dest is null",
69  NULL, ESNULLP);
70  return (RCNEGATE(ESNULLP));
71  }
72 
73  if (len == 0) {
74  invoke_safe_mem_constraint_handler("memzero32_s: len is 0",
75  NULL, ESZEROL);
76  return (RCNEGATE(ESZEROL));
77  }
78 
79  if (len > RSIZE_MAX_MEM32) {
80  invoke_safe_mem_constraint_handler("memzero32_s: len exceeds max",
81  NULL, ESLEMAX);
82  return (RCNEGATE(ESLEMAX));
83  }
84 
85  /*
86  * mem_prim_set32(dest, len, 0xDEADBEEF);
87  * mem_prim_set32(dest, len, 0xBA5EBA11);
88  */
89  mem_prim_set32(dest, len, 0);
90 
91  return (RCNEGATE(EOK));
92 }
93 EXPORT_SYMBOL(memzero32_s)
void mem_prim_set32(uint32_t *dest, uint32_t len, uint32_t value)
Sets len uint32_t's starting at dest to the specified value.
errno_t memzero32_s(uint32_t *dest, rsize_t len)
Zeros len uint32_ts starting at dest.
Definition: memzero32_s.c:64
void invoke_safe_mem_constraint_handler(const char *msg, void *ptr, errno_t error)
Invokes the currently set constraint handler or the default.