Redefining NULL

Question

I\'m writing C code for a system where address 0x0000 is valid and contains port I/O. Therefore, any possible bugs that access a NULL pointer will remain undetected and at t

Answer 1

The bit pattern for the null pointer may not be the same as the bit pattern for the integer 0. But the expansion of the NULL macro must be a null pointer constant, that is a constant integer of value 0 which may be casted to (void*).

To achieve the result you want while staying conformant, you'll have to modify (or perhaps configurate) your tool chain, but it is achievable.