protected override void CleanupManagedResources()
{
try
{
base.CleanupManagedResources();
}
finally
{
// When we aren't sure if we're being used to harmonise an XIP collection
// we must check whether the base address has been set to something other than
// zero and that the address is in the XIP range.
// NB: Other cases are handled in the constructor.
if (iType == TCollectionType.EPossiblyXIP)
{
if (!iCollection.IsEmptyApartFromDefaultSymbol)
{
Symbol first = iCollection.FirstSymbol;
uint address = first.Address;
if (address > 0)
{
TMemoryModelRegion region = MMUtilities.RegionByAddress(address);
bool isFixed = (region == TMemoryModelRegion.EMemoryModelRegionROM);
iCollection.IsFixed = isFixed;
}
else
{
// First address is zero, indicates RAM-loaded code and therefore
// non-XIP.
iCollection.IsFixed = false;
}
}
else
{
// The collection only contains the default symbol so in that case
// it can be thought to be relocatable (although in practise that wouldn't
// be very helpful). The main point is that we don't want this collection
// to start matching null addresses (quite common when performing symbolic
// lookup).
iCollection.IsFixed = false;
}
}
}
}
private void UpdateAttributes()
{
// Remove XIP/RAM attrib before we work out the type...
iAttributes &= ~TAttributes.EAttributeRAM;
iAttributes &= ~TAttributes.EAttributeXIP;
MemoryModel.TMemoryModelType type = MMUtilities.TypeByAddress(Base);
if (type != MemoryModel.TMemoryModelType.EMemoryModelUnknown)
{
MemoryModel.TMemoryModelRegion region = MMUtilities.RegionByAddress(Base, type);
//
if (region == MemoryModel.TMemoryModelRegion.EMemoryModelRegionROM)
{
iAttributes |= TAttributes.EAttributeXIP;
}
else if (region == MemoryModel.TMemoryModelRegion.EMemoryModelRegionRAMLoadedCode)
{
iAttributes |= TAttributes.EAttributeRAM;
}
}
}
private bool PreFilterBasedUponFlags(Symbol aSymbol)
{
// Do we need to update the length of the previous symbol?
if ((iFlags & TFlags.EFlagsUpdateLengthOfPreviousSymbol) == TFlags.EFlagsUpdateLengthOfPreviousSymbol)
{
FlagBasedUpdateOfLastSymbolLength(aSymbol);
}
// Check for Image$$ER_RO$$Base
// This symbol is emitted for user-side code and can be used to work around some maksym problems.
string symbolName = aSymbol.Name;
if (symbolName == KSectionNameUserBase)
{
int count = iCollection.Count;
if (!iCollection.IsEmptyApartFromDefaultSymbol)
{
// Discard all the entries we've seen so far because most likely
// they are invalid.
System.Diagnostics.Debug.WriteLine(string.Format("Discarding {0} invalid symbols for library: {1}", count, iCollection.FileName));
iCollection.Clear();
// At this point, we need to reset the base address because any symbols that have gone
// before are invalid.
iFlags &= ~TFlags.EFlagsHaveSetXIPBaseAddress;
}
}
// Do we need to set the base address for the symbol collection?
bool haveSetXIPBase = ((iFlags & TFlags.EFlagsHaveSetXIPBaseAddress) == TFlags.EFlagsHaveSetXIPBaseAddress);
if (!haveSetXIPBase && iType != TCollectionType.ENotXIP)
{
// If we're seeing the first valid symbol, then try to set the base address
bool needToSet = true;
if (iType == TCollectionType.EPossiblyXIP)
{
// Perhaps we're dealing with an XIP collection. In which case, we need to check
// with the memory model utility to decide if it really is or not.
//
// If the symbol address is zero (NULL), then we can't be dealing with an
// XIP collection.
if (aSymbol.Address == 0)
{
// ROFS
needToSet = true;
}
else
{
TMemoryModelRegion region = MMUtilities.RegionByAddress(aSymbol.Address);
needToSet = (region == TMemoryModelRegion.EMemoryModelRegionROM);
}
}
if (needToSet)
{
SetCollectionBaseAddress(aSymbol);
}
}
bool disallowNewSymbols = (iFlags & TFlags.EFlagsDisallowFurtherSymbolsForCollection) == TFlags.EFlagsDisallowFurtherSymbolsForCollection;
return(!disallowNewSymbols);
}
