C is not as simple as it seems
C is not as simple as it seems
Posted Sep 26, 2024 10:36 UTC (Thu) by smurf (subscriber, #17840)In reply to: C is not as simple as it seems by joib
Parent article: Linus and Dirk on succession, Rust, and more
On a Harvard architecture system (like embedded 8-bit Atmel CPUs) plain C doesn't know *anything* about which part of the architecture your pointer refers to. It's just a value in a register. Literally everything you do with pointers that refer to the "wrong" address space (e.g. read-only strings stored in Flash) requires compiler-specific extensions, macros, and/or special functions.
Fortunately GCC has some extensions that warn you if you use the wrong kind of pointer, but for any new project on these things I'd use Rust instead.
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