linux-os wrote:
Does this mean that we can't mmap the screen regen buffer at 0x000b8000 anymore?
How do I look at the real-mode interrupt table starting at offset 0? You know that the return value of mmap is to be checked for MAP_FAILED, not for NULL, don't you?
Can't you still map those physical addresses to other virtual addresses?
What 'C' standard do you refer to? Seg-faults on null pointers have nothing to do with the 'C' standard and everything to do with the platform.
I believe the ISO/IEC 9899:1999 C Standard explicitly states that dereferencing a null pointer with the unary * operator results in undefined behavior.
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