C has no concept of CPU registers, CPU interrupts, or OS kernel functions.
C has no access to the underlying hardware.
However, some C implementations provide extensions which do access these.
This is often in the form of inline assembly, and extensions to allow pointers to remain well defined when pointing outside of memory allocated within C.
Let us not confuse C with our preferred implementations of C.
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C has no concept of CPU registers, CPU interrupts, or OS kernel functions.
C has no access to the underlying hardware.
However, some C implementations provide extensions which do access these.
This is often in the form of inline assembly, and extensions to allow pointers to remain well defined when pointing outside of memory allocated within C.
Let us not confuse C with our preferred implementations of C.