C++ Code in kernel modules

> Is it possible to load kernel modules into Solaris

> that contain C++ code? If so, what compile/linker

> options are required to make this happen?

Hello.

Yes. The kernel modules are independent of programming language as long as the object file format is correct. So C++ will work.

There are two kinds of problems:

1) The _init, _fini and _info functions must have the same name as in other programming languages. This is a problem in C++ because C++ adds data type information to symbol names in the object files. This means a function named "int x(int)" would have the symbol name "_x" when using C/x86 or just "x" when using C/Sparc while it may have a symbol name like "1_xII" when using C++ (the actual symbol name depends on the C++ compiler used).

To solve this problem you may use the 'extern "C"' statement or write a simple assembler wrapper function.

2) Normally C++ requires a large run-time library. One example for this is the "new" operator. You'll have to write a replacement for this run-time library. So if you want to use the "new" operator you'll have to provide a function named "operator new(int size)" (or something like that). This is true for ALL C++ operators (delete, new[], delete[], ...).

Martin

Martin_Rosenau at 2007-7-7 3:27:36 >