Boot process "scheduler"

Question

Where in the boot process does the "scheduler" get created and when created how can its instructions be accessed?

Answer 1

That depends on the OS you use, but several things should be clear:

• before the first switch to userland
• before any kernel threads are started or any other multi-programming (multi-tasking) is done

Obviously that is relatively early in the boot process.

What exactly do you mean by "how can its instructions be accessed?"?