1 /*
2 * alloc.c
3 *
4 * memory allocation and deallocation
5 *
6 * David A. McGrew
7 * Cisco Systems, Inc.
8 */
9 /*
10 *
11 * Copyright (c) 2001-2006 Cisco Systems, Inc.
12 * All rights reserved.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 *
18 * Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 *
21 * Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials provided
24 * with the distribution.
25 *
26 * Neither the name of the Cisco Systems, Inc. nor the names of its
27 * contributors may be used to endorse or promote products derived
28 * from this software without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
33 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
34 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
35 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
36 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
37 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
41 * OF THE POSSIBILITY OF SUCH DAMAGE.
42 *
43 */
44
45 #include "alloc.h"
46 #include "crypto_kernel.h"
47
48 /* the debug module for memory allocation */
49
50 debug_module_t mod_alloc = {
51 0, /* debugging is off by default */
52 "alloc" /* printable name for module */
53 };
54
55 /*
56 * Nota bene: the debugging statements for crypto_alloc() and
57 * crypto_free() have identical prefixes, which include the addresses
58 * of the memory locations on which they are operating. This fact can
59 * be used to locate memory leaks, by turning on memory debugging,
60 * grepping for 'alloc', then matching alloc and free calls by
61 * address.
62 */
63
64 #ifdef SRTP_KERNEL_LINUX
65
66 #include <linux/interrupt.h>
67
68 void *
crypto_alloc(size_t size)69 crypto_alloc(size_t size) {
70 void *ptr;
71
72 ptr = kmalloc(size, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
73
74 if (ptr) {
75 debug_print(mod_alloc, "(location: %p) allocated", ptr);
76 } else
77 debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size);
78
79 return ptr;
80 }
81
82 void
crypto_free(void * ptr)83 crypto_free(void *ptr) {
84
85 debug_print(mod_alloc, "(location: %p) freed", ptr);
86
87 kfree(ptr);
88 }
89
90
91 #elif defined(HAVE_STDLIB_H)
92
93 void *
crypto_alloc(size_t size)94 crypto_alloc(size_t size) {
95 void *ptr;
96
97 ptr = malloc(size);
98
99 if (ptr) {
100 debug_print(mod_alloc, "(location: %p) allocated", ptr);
101 } else
102 debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size);
103
104 return ptr;
105 }
106
107 void
crypto_free(void * ptr)108 crypto_free(void *ptr) {
109
110 debug_print(mod_alloc, "(location: %p) freed", ptr);
111
112 free(ptr);
113 }
114
115 #else /* we need to define our own memory allocation routines */
116
117 #error no memory allocation defined yet
118
119 #endif
120