Paweł Sikora wrote:
do you say that we can't write a valid/defined program in C for e.g. arm architercture? on some arms, the object (vector interrupt table) starts at adress 0x0.
If 0 is a valid address, then it is improper for the compiler to use 0 to represent the null pointer. You may have in mind the idea that the null pointer has a representation of all zero bits, but there is no such requirement or suggestion in the C language.
