public FunctionContext(
TranslationContext translationContext,
GimpleFunction gimpleFunction,
JimpleMethodBuilder builder) {
this.gimpleFunction = gimpleFunction;
this.translationContext = translationContext;
this.builder = builder;
VarUsageInspector varUsage = new VarUsageInspector(gimpleFunction);
for (GimpleVarDecl decl : gimpleFunction.getVariableDeclarations()) {
Variable localVariable =
translationContext
.resolveType(decl.getType())
.createLocalVariable(this, decl.getName(), varUsage.getUsage(decl.getId()));
symbolTable.put(decl.getId(), localVariable);
}
for (GimpleParameter param : gimpleFunction.getParameters()) {
ImType type = translationContext.resolveType(param.getType());
builder.addParameter(type.paramType(), "p_" + param.getName());
ImExpr paramExpr =
JvmExprs.toExpr(this, new JimpleExpr("p_" + param.getName()), type.paramType(), true);
Variable variable =
type.createLocalVariable(this, param.getName(), varUsage.getUsage(param.getId()));
variable.writeAssignment(this, paramExpr);
symbolTable.put(param.getId(), variable);
}
}
public ImExpr lookupVar(GimpleExpr gimpleExpr) {
if (gimpleExpr instanceof SymbolRef) {
SymbolRef symbol = (SymbolRef) gimpleExpr;
ImExpr variable = symbolTable.get(symbol.getId());
if (variable != null) {
return variable;
}
if (symbol.getName() != null) {
variable = translationContext.findGlobal(symbol.getName());
}
if (variable == null) {
throw new IllegalArgumentException(
"No such variable '" + gimpleExpr + "' (id=" + symbol.getId() + ")");
}
return variable;
} else {
throw new UnsupportedOperationException(
"Expected GimpleVar, got: "
+ gimpleExpr
+ " ["
+ gimpleExpr.getClass().getSimpleName()
+ "]");
}
}
public ImExpr resolveExpr(GimpleExpr gimpleExpr) {
if (gimpleExpr instanceof GimpleMemRef) {
return resolveExpr(((GimpleMemRef) gimpleExpr).getPointer()).memref();
} else if (gimpleExpr instanceof SymbolRef) {
return lookupVar(gimpleExpr);
} else if (gimpleExpr instanceof GimpleStringConstant) {
return new ImStringConstant((GimpleStringConstant) gimpleExpr);
} else if (gimpleExpr instanceof GimpleConstant) {
return new ImPrimitiveConstant(this, (GimpleConstant) gimpleExpr);
} else if (gimpleExpr instanceof GimpleAddressOf) {
return resolveExpr(((GimpleAddressOf) gimpleExpr).getValue()).addressOf();
} else if (gimpleExpr instanceof GimpleFunctionRef) {
return new ImFunctionExpr(
translationContext.resolveMethod(((GimpleFunctionRef) gimpleExpr).getName()));
} else if (gimpleExpr instanceof GimpleArrayRef) {
GimpleArrayRef arrayRef = (GimpleArrayRef) gimpleExpr;
return resolveExpr(arrayRef.getArray()).elementAt(resolveExpr(arrayRef.getIndex()));
} else if (gimpleExpr instanceof GimpleComponentRef) {
GimpleComponentRef componentRef = (GimpleComponentRef) gimpleExpr;
return resolveExpr(componentRef.getValue()).member(componentRef.getMember());
} else if (gimpleExpr instanceof GimpleConstantRef) {
return resolveExpr(((GimpleConstantRef) gimpleExpr).getValue());
}
throw new UnsupportedOperationException(gimpleExpr.toString());
}
public MethodRef resolveMethod(GimpleCall call) {
return translationContext.resolveMethod(call, getCallingConvention());
}