Maksim Panchenko 6b1cf00400 [BOLT] Add support for Linux kernel static keys jump table (#86090) ...

Runtime code modification used by static keys is the most ubiquitous
self-modifying feature of the Linux kernel. The idea is to to eliminate
the condition check and associated conditional jump on a hot path if
that condition (based on a boolean value of a static key) does not
change often. Whenever they condition changes, the kernel runtime
modifies all code paths associated with that key flipping the code
between nop and (unconditional) jump.

2024-03-21 14:05:21 -07:00

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