name mangling, using the __cpp keyword

the way the implicit this parameter is passed

the way virtual functions are called

the representation of references

the layout of C++ class types that have base classes or virtual member functions

the passing of class objects that are not plain old data structures.

Use C calling conventions.

In C++, nonmember functions can be declared as extern "C" to specify that they have C linkage. In this release of RealView^® Compilation Tools (RVCT), having C linkage means that the symbol defining the function is not mangled. C linkage can be used to implement a function in one language and call it from another.

Assembly language modules must conform to the appropriate AAPCS standard for the memory model used by the application.

To call a global (nonmember) C++ function, declare it extern "C" to give it C linkage.

Member functions (both static and non-static) always have mangled names. Using the __cpp keyword of the embedded assembler means that you do not have to find the mangled names manually.

C++ inline functions cannot be called from C unless you ensure that the C++ compiler generates an out-of-line copy of the function. For example, taking the address of the function results in an out-of-line copy.

Nonstatic member functions receive the implicit this parameter as a first argument in r0, or as a second argument in r1 if the function returns a non int-like structure. Static member functions do not receive an implicit this parameter.