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the implementation of FVB->SetAttribute() interface should check the unchanged bit in parameter at first. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4267 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
klu2 2007-11-05 06:29:00 +00:00
parent a3589760c4
commit a4c9ede55f
1 changed files with 19 additions and 0 deletions
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19
Nt32Pkg/FvbServicesRuntimeDxe/FWBlockService.c
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@ -740,6 +740,7 @@ Returns:
UINT32 OldStatus;
UINT32 NewStatus;
EFI_STATUS Status;
EFI_FVB_ATTRIBUTES UnchangedAttributes;
//
// Find the right instance of the FVB private data
@ -758,6 +759,24 @@ Returns:
OldStatus = OldAttributes & EFI_FVB2_STATUS;
NewStatus = *Attributes & EFI_FVB2_STATUS;
UnchangedAttributes = EFI_FVB2_READ_DISABLED_CAP | \
EFI_FVB2_READ_ENABLED_CAP | \
EFI_FVB2_WRITE_DISABLED_CAP | \
EFI_FVB2_WRITE_ENABLED_CAP | \
EFI_FVB2_LOCK_CAP | \
EFI_FVB2_STICKY_WRITE | \
EFI_FVB2_MEMORY_MAPPED | \
EFI_FVB2_ERASE_POLARITY | \
EFI_FVB2_READ_LOCK_CAP | \
EFI_FVB2_WRITE_LOCK_CAP | \
EFI_FVB2_ALIGNMENT;
//
// Some attributes of FV is read only can *not* be set
//
if ((OldAttributes & UnchangedAttributes) ^ (*Attributes & UnchangedAttributes)) {
return EFI_INVALID_PARAMETER;
}
//
// If firmware volume is locked, no status bit can be updated
//