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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLib/SysCall/BaseMemAllocation.c | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLib/SysCall/BaseMemAllocation.c')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLib/SysCall/BaseMemAllocation.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLib/SysCall/BaseMemAllocation.c b/src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLib/SysCall/BaseMemAllocation.c new file mode 100644 index 00000000..1b1611f3 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLib/SysCall/BaseMemAllocation.c @@ -0,0 +1,112 @@ +/** @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); + } +} |