Revision as of 06:04, 7 August 2018 view source Brendan (talk \| contribs) 250 edits m Typos! ← Older edit		Revision as of 15:39, 3 October 2019 view source osdev>Notschur →‎Kernel Stack Per Task Newer edit →
Line 28: ===Kernel Stack Per Task=== ~~For~~In most kernels, each task has its own kernel stack ~~where~~used when a task moves between user-space (and user stack) and kernel (and kernel stack). ~~For~~In this case, task switches only ever happen after something else (IRQ, exception, system call) has already caused the task to switch to kernel code and kernel stack; which means that task switches can only ever occur between tasks that are running kernel code. For example (NASM syntax, 32-bit 80x86, "cdecl" calling convention, single-CPU only/globals used for "per CPU" variables, no support for FPU/MMX/SSE/AVX, untested):

Multitasking Systems: Difference between revisions