> and practically speaking, there are only so many entries you can store in an IDT.
The number of syscalls isn't limited by this, they all go through the same interrupt and are dispatched to a specific handler function based on the value of a register.
The number of syscalls isn't limited by this, they all go through the same interrupt and are dispatched to a specific handler function based on the value of a register.
For example this is how it works on arm64: https://elixir.bootlin.com/linux/v6.5/source/arch/arm64/kern...
And on x86: https://elixir.bootlin.com/linux/v6.5/source/arch/x86/entry/...