blob: 1b1611f3819700a003b86de420d324f68d7fc506 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/** @file
Base Memory Allocation Routines Wrapper for Crypto library over OpenSSL
during PEI & DXE phases.
Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <CrtLibSupport.h>
#include <Library/MemoryAllocationLib.h>
//
// Extra header to record the memory buffer size from malloc routine.
//
#define CRYPTMEM_HEAD_SIGNATURE SIGNATURE_32('c','m','h','d')
typedef struct {
UINT32 Signature;
UINT32 Reserved;
UINTN Size;
} CRYPTMEM_HEAD;
#define CRYPTMEM_OVERHEAD sizeof(CRYPTMEM_HEAD)
//
// -- Memory-Allocation Routines --
//
/* Allocates memory blocks */
void *malloc (size_t size)
{
CRYPTMEM_HEAD *PoolHdr;
UINTN NewSize;
VOID *Data;
//
// Adjust the size by the buffer header overhead
//
NewSize = (UINTN)(size) + CRYPTMEM_OVERHEAD;
Data = AllocatePool (NewSize);
if (Data != NULL) {
PoolHdr = (CRYPTMEM_HEAD *)Data;
//
// Record the memory brief information
//
PoolHdr->Signature = CRYPTMEM_HEAD_SIGNATURE;
PoolHdr->Size = size;
return (VOID *)(PoolHdr + 1);
} else {
//
// The buffer allocation failed.
//
return NULL;
}
}
/* Reallocate memory blocks */
void *realloc (void *ptr, size_t size)
{
CRYPTMEM_HEAD *OldPoolHdr;
CRYPTMEM_HEAD *NewPoolHdr;
UINTN OldSize;
UINTN NewSize;
VOID *Data;
NewSize = (UINTN)size + CRYPTMEM_OVERHEAD;
Data = AllocatePool (NewSize);
if (Data != NULL) {
NewPoolHdr = (CRYPTMEM_HEAD *)Data;
NewPoolHdr->Signature = CRYPTMEM_HEAD_SIGNATURE;
NewPoolHdr->Size = size;
if (ptr != NULL) {
//
// Retrieve the original size from the buffer header.
//
OldPoolHdr = (CRYPTMEM_HEAD *)ptr - 1;
ASSERT (OldPoolHdr->Signature == CRYPTMEM_HEAD_SIGNATURE);
OldSize = OldPoolHdr->Size;
//
// Duplicate the buffer content.
//
CopyMem ((VOID *)(NewPoolHdr + 1), ptr, MIN (OldSize, size));
FreePool ((VOID *)OldPoolHdr);
}
return (VOID *)(NewPoolHdr + 1);
} else {
//
// The buffer allocation failed.
//
return NULL;
}
}
/* De-allocates or frees a memory block */
void free (void *ptr)
{
CRYPTMEM_HEAD *PoolHdr;
//
// In Standard C, free() handles a null pointer argument transparently. This
// is not true of FreePool() below, so protect it.
//
if (ptr != NULL) {
PoolHdr = (CRYPTMEM_HEAD *)ptr - 1;
ASSERT (PoolHdr->Signature == CRYPTMEM_HEAD_SIGNATURE);
FreePool (PoolHdr);
}
}
|