How programs get run: ELF binaries
How programs get run: ELF binaries
Posted Feb 12, 2015 16:52 UTC (Thu) by nye (guest, #51576)Parent article: How programs get run: ELF binaries
>An empty page may also be mapped at the zero address in the program's address
>space for backward-compatibility reasons (old SVr4 programs apparently assume
>that reading from a NULL pointer would return zeros rather than SIGSEGV).
>space for backward-compatibility reasons (old SVr4 programs apparently assume
>that reading from a NULL pointer would return zeros rather than SIGSEGV).
I have an instinctive reaction that this sort of behaviour should have to be explicitly enabled via sysctl or something - it seems to violate the principle of least astonishment in a way that could have surprising implications, including security ones.
Am I way off base here? Certainly I am working from a position of abject ignorance.