public ImgSource(string aURI, CodeSourceProvider aProvider, CodeCollection aCollection, SIContent aImageContent)
: base(aURI, aProvider)
{
iImageContent = aImageContent;
// Make sure we receive any requests from the collection object for code.
aCollection.IfaceInstructionConverter = this;
aCollection.IsRelocatable = aImageContent.IsRelocationSupported;
// XIP content should be read during priming.
TTimeToRead timeToRead = TTimeToRead.EReadWhenPriming;
if (aImageContent.IsRelocationSupported)
{
timeToRead = TTimeToRead.EReadWhenNeeded;
}
else
{
// If the image is fixed, then so is the collection base address
aCollection.Relocate(aImageContent.RelocationAddress);
}
// Must add the collection *after* setting it's properties
base.TimeToRead = timeToRead;
base.Add(aCollection);
}
public CodeCollection Activate(CodeSegDefinition aCodeSegment)
{
CodeCollection ret = null;
// Find the corresponding Code seg
CodeSourceAndCollection pair = SourceManager[aCodeSegment];
if (pair != null)
{
CodeCollection col = pair.Collection;
if (col.IsFixed)
{
// Cannot activate a fixed Code segment - TODO: should this return "true", i.e. already activated?
}
else
{
bool safe = CheckSafeToActivate(aCodeSegment);
if (safe)
{
// Deep copy the collection
CodeCollection dupe = CodeCollection.NewCopy(iPlugin.ProvisioningManager.IdAllocator, col);
// Set new process-specific relocated base address. This causes the underlying code to be
// decompressed/read if not already done so.
dupe.Relocate(aCodeSegment.Base);
// At this point, the code owned by 'col' will have definitely been read (if available)
// and that means col.IsCodeAvailable is probably true. However, dupe.IsCodeAvailable
// is almost certainly false so we may need to copy the code over...
if (dupe.IsCodeAvailable == false && col.IsCodeAvailable == true)
{
dupe.Code = col.Code;
}
System.Diagnostics.Debug.Assert(dupe.IsCodeAvailable == col.IsCodeAvailable);
// Save so that we can unload it later
pair = new CodeSourceAndCollection(pair, dupe);
AddToActivationList(pair, aCodeSegment);
// We managed to activate a binary, so return the collection
ret = dupe;
iPlugin.Trace("[C] ACTIVATE - {0}", aCodeSegment);
}
}
}
//
return(ret);
}