hard20 pts · first answer countsembedded-cundefined-behaviour

Reading NULL does not crash

On many Cortex-M parts, reading *(uint32_t *)0 returns a value instead of faulting. Why, and how can you catch NULL reads?

A.The CPU ignores reads of address 0B.Address 0 maps to flash; use the MPU to block itC.The compiler maps NULL to the end of RAMD.NULL reads always fault on Cortex-M

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Reading NULL does not crash

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