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