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Code Issues Releases Wiki Activity

GP-1653 Allow PrototypeModel aliases

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This commit is contained in:
caheckman 2022-01-21 12:42:49 -05:00
parent 22a5950d08
commit cb913e6a91
6 changed files with 234 additions and 45 deletions
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32
Ghidra/Features/Decompiler/src/decompile/cpp/architecture.cc
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@ -747,6 +747,7 @@ void Architecture::parseDynamicRule(const Element *el)
/// This handles the \<prototype> and \<resolveprototype> tags. It builds the
/// ProtoModel object based on the tag and makes it available generally to the decompiler.
/// \param el is the XML tag element
/// \return the new ProtoModel object
ProtoModel *Architecture::parseProto(const Element *el)
{
@ -1100,6 +1101,26 @@ void Architecture::parseAggressiveTrim(const Element *el)
}
}
/// Clone the named ProtoModel, attaching it to another name.
/// \param aliasName is the new name to assign
/// \param parentName is the name of the parent model
void Architecture::createModelAlias(const string &aliasName,const string &parentName)
{
map<string,ProtoModel *>::const_iterator iter = protoModels.find(parentName);
if (iter == protoModels.end())
throw LowlevelError("Requesting non-existent prototype model: "+parentName);
ProtoModel *model = (*iter).second;
if (model->isMerged())
throw LowlevelError("Cannot make alias of merged model: "+parentName);
if (model->getAliasParent() != (const ProtoModel *)0)
throw LowlevelError("Cannot make alias of an alias: "+parentName);
iter = protoModels.find(aliasName);
if (iter != protoModels.end())
throw LowlevelError("Duplicate ProtoModel name: "+aliasName);
protoModels[aliasName] = new ProtoModel(aliasName,*model);
}
/// This looks for the \<processor_spec> tag and and sets configuration
/// parameters based on it.
/// \param store is the document store holding the tag
@ -1215,6 +1236,12 @@ void Architecture::parseCompilerConfig(DocumentStorage &store)
parseDeadcodeDelay(*iter);
else if (elname == "inferptrbounds")
parseInferPtrBounds(*iter);
else if (elname == "modelalias") {
const Element *el = *iter;
string aliasName = el->getAttributeValue("name");
string parentName = el->getAttributeValue("parent");
createModelAlias(aliasName, parentName);
}
}
el = store.getTag("specextensions"); // Look for any user-defined configuration document
@ -1224,7 +1251,7 @@ void Architecture::parseCompilerConfig(DocumentStorage &store)
const string &elname( (*iter)->getName() );
if (elname == "prototype")
parseProto(*iter);
else if (elname == "callfixup") {
else if (elname == "callfixup") {
pcodeinjectlib->restoreXmlInject(archid+" : compiler spec", (*iter)->getAttributeValue("name"),
InjectPayload::CALLFIXUP_TYPE, *iter);
}
@ -1253,8 +1280,7 @@ void Architecture::parseCompilerConfig(DocumentStorage &store)
// We must have a __thiscall calling convention
map<string,ProtoModel *>::iterator miter = protoModels.find("__thiscall");
if (miter == protoModels.end()) { // If __thiscall doesn't exist we clone it off of the default
ProtoModel *thismodel = new ProtoModel("__thiscall",*defaultfp);
protoModels["__thiscall"] = thismodel;
createModelAlias("__thiscall",defaultfp->getName());
}
userops.setDefaults(this);
initializeSegments();