https://github.com/lyonsyonii/zeos

SO2 project
https://github.com/lyonsyonii/zeos

Last synced: 10 months ago
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SO2 project

• Host: GitHub
• URL: https://github.com/lyonsyonii/zeos
• Owner: LyonSyonII
• Created: 2024-09-15T17:08:27.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-12-20T11:59:05.000Z (over 1 year ago)
• Last Synced: 2025-05-24T23:43:02.982Z (about 1 year ago)
• Language: C
• Size: 12.8 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
> Uriel Camí & Liam Garriga

# ZEOS - FiB UPC (2024-2025)

## Directory Structure

- [SO2] bootsect.S: boot sector definition

- [SO2] build.c: build process

- clock.c: Clock interrupt management

- [SO2] devices.c: sys_write_console

- entry.S: Interrupt/Syscall (HW/SW) + Exception handlers + SAVE_ALL/RESTORE_ALL macros

- hardware.c: enable hardware interrupt mask

- interrupt.c: set_idt + print_page_fault

- [SO2] io.c: Console output

- keyboard.c: Keyboard interrupt management + char_map

- libc_sys.S: libc syscall wrappers

- libc.c: utils + syscall wrapper API + errno

- [SO2] list.c: linked list implementation

- [SO2] mm.c: Memory definition and initialization

- [SO2] sched.c: Stub Scheduler implementation

- sys_call_table.S: Syscall id definition

- sys.c: Syscall routine implementations

- system.c: Kernel main (boot, init, launch user code)

- user.c: User code

- utils.c: copy_from_XXX, access_ok, itox, ...

## TO-DO

- [x] Complete Zeos code.

    - [x] Implement the macro RESTORE_ALL.

    - [x] Implement the macro EOI.

- [x] Implement the keyboard management.

    - [x] Implement the keyboard service routine.

    - [x] Implement the keyboard handler.

    - [x] Initialize the IDT with the keyboard handler

    - [x] Enable the interrupt.

- [x] Implement the write system call.

    - Hem d'utilitzar `sysenter` (fer el que fa `int` manualment)

      Excepte canvi d'usuari a sistema i IDT

      Hem de guardar la direccio del handler global a registres de MSR a l'inici del sistema `wrmsr/rdmsr`

      Perdem la posicio de la pila d'usuari `%ebp` i posicio de codi (etiqueta), les guardem a la pila

    - Copiem parametres a EDX, ECX, EBX

      Si en tenim massa, guardem a la pila i un dels parametres sera la direccio de la pila on es troben

- [x] Implement the clock management.

- [x] Implement the gettime system call.

- [x] Implement the page fault exception management.