I have just updated the OS Development Series Tutorial 7: System Architecture
It has been updated to include:A list of all Ring-0 only privileged instructions for referenceThree new registers: TRP, CR8, and MSRThe MSR in detail, along with using RDMSR and WRMSR x86 assembly instructionsBreaking apart the processor (Still being worked on)
This is an important update, as the upcomming tutorial relies on some new concepts described in this update. More specifically, the MSR
and the RDMSR
The upcoming tutorial--Tutorial 12
covers basic concepts that all Kernels must work with. This includes a basic overview of:Kernel: Basic Definition and ConceptsLevels of software, and where the Kernel standsMemory Management issues, including basic overview of Virtual Address Space (VAS), Virtual Memory, MMU, and Paging)Program Management Issues, including: System APIs, and System Calls, which includes Software Interrupts, Call Gates, SYSENTER/SYSRET instructions, and SYSCALL/SYSEXIT instructionsError handlingMultitaskingFilesystemsDevice Management
Depending on the size of this tutorial, I may or may not go over Kernel designs and implementations.
More to come...