Add implementation of ReallocatePool which is defined in the
MemoryAllocationLib header file to allow components to not
need special handling for PrePi module types.
Signed-off-by: Jeff Brasen <jbra...@nvidia.com>
---
.../MemoryAllocationLib.c | 57 +++++++++++++++++++
1 file changed, 57 insertions(+)
diff --git a/EmbeddedPkg/Library/PrePiMemoryAllocationLib/MemoryAllocationLib.c
b/EmbeddedPkg/Library/PrePiMemoryAllocationLib/MemoryAllocationLib.c
index 08a0add340cf..fa81cc9d595a 100644
--- a/EmbeddedPkg/Library/PrePiMemoryAllocationLib/MemoryAllocationLib.c
+++ b/EmbeddedPkg/Library/PrePiMemoryAllocationLib/MemoryAllocationLib.c
@@ -269,3 +269,60 @@ FreePool (
{
// Not implemented yet
}
+
+/**
+ Reallocates a buffer of type EfiBootServicesData.
+
+ Allocates and zeros the number bytes specified by NewSize from memory of type
+ EfiBootServicesData. If OldBuffer is not NULL, then the smaller of OldSize
and
+ NewSize bytes are copied from OldBuffer to the newly allocated buffer, and
+ OldBuffer is freed. A pointer to the newly allocated buffer is returned.
+ If NewSize is 0, then a valid buffer of 0 size is returned. If there is not
+ enough memory remaining to satisfy the request, then NULL is returned.
+
+ If the allocation of the new buffer is successful and the smaller of NewSize
and OldSize
+ is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().
+
+ @param OldSize The size, in bytes, of OldBuffer.
+ @param NewSize The size, in bytes, of the buffer to reallocate.
+ @param OldBuffer The buffer to copy to the allocated buffer. This is
an optional
+ parameter that may be NULL.
+
+ @return A pointer to the allocated buffer or NULL if allocation fails.
+
+**/
+VOID *
+EFIAPI
+ReallocatePool (
+ IN UINTN OldSize,
+ IN UINTN NewSize,
+ IN VOID *OldBuffer OPTIONAL
+ )
+{
+ VOID *NewBuffer;
+
+ // Validate the OldBuffer is HobAllocated.
+ DEBUG_CODE_BEGIN ();
+ EFI_HOB_HANDOFF_INFO_TABLE *HandOffHob;
+
+ if (OldBuffer != NULL) {
+ HandOffHob = GetHobList ();
+ ASSERT (((EFI_PHYSICAL_ADDRESS)(UINTN)OldBuffer >=
HandOffHob->EfiMemoryBottom));
+ ASSERT (((EFI_PHYSICAL_ADDRESS)(UINTN)(OldBuffer + OldSize) <=
HandOffHob->EfiFreeMemoryBottom));
+ }
+
+ DEBUG_CODE_END ();
+
+ // If new buffer would be smaller just return old buffer as FreePool isn't
supported.
+ if ((OldBuffer != NULL) && (OldSize >= NewSize)) {
+ return OldBuffer;
+ }
+
+ NewBuffer = AllocateZeroPool (NewSize);
+ if ((NewBuffer != NULL) && (OldBuffer != NULL)) {
+ CopyMem (NewBuffer, OldBuffer, MIN (OldSize, NewSize));
+ FreePool (OldBuffer);
+ }
+
+ return NewBuffer;
+}
--
2.34.1
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