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Refactoring assembly entry point

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This commit is contained in:
Marco Cetica 2021-02-03 15:59:42 +01:00
parent dc3803491e
commit 1b207add8c
61 changed files with 4782 additions and 4779 deletions
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5
kernel/cpu/Makefile
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@ -1,5 +1,6 @@
OBJS = kernel_loader.asm.o ports.asm.o \
gdt.asm.o idt.asm.o interrupts.asm.o
OBJS = main.asm.o ports.asm.o \
gdt.asm.o idt.asm.o \
interrupts.asm.o header.asm.o
ASM = nasm
ASMFLAGS = -f elf32

6
kernel/cpu/gdt.asm
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@ -1,10 +1,10 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; vulcanOS Kernel ;
; Developed by Marco 'icebit' Cetica ;
; (c) 2019-2021 ;
; Released under GPLv3 ;
; https://github.com/ice-bit/iceOS ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; https://github.com/ice-bit/vulcanos ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
global gdt_flush ; for drivers/gdt.c
section .text

19
kernel/cpu/header.asm Normal file
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@ -0,0 +1,19 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; vulcanOS Kernel ;
; Developed by Marco 'icebit' Cetica ;
; (c) 2019-2021 ;
; Released under GPLv3 ;
; https://github.com/ice-bit/vulcanos ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
section .multiboot_header
header_s:
dd 0xE85250D6 ; Magic number for multiboot
dd 0 ; Protected mode flag
dd header_e - header_s ; Header length
dd 0x100000000 - (0xE85250D6 + 0 + (header_e - header_s)) ; Checksum
; Other flags
dw 0 ; Type
dw 0 ; Flags
dw 0 ; Size
header_e:

6
kernel/cpu/idt.asm
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@ -1,10 +1,10 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; vulcanOS Kernel ;
; Developed by Marco 'icebit' Cetica ;
; (c) 2019-2021 ;
; Released under GPLv3 ;
; https://github.com/ice-bit/iceOS ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; https://github.com/ice-bit/vulcanos ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
global idt_flush ; for drivers/idt.c
section .text

6
kernel/cpu/interrupts.asm
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@ -1,10 +1,10 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; vulcanOS Kernel ;
; Developed by Marco 'icebit' Cetica ;
; (c) 2019-2021 ;
; Released under GPLv3 ;
; https://github.com/ice-bit/iceOS ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; https://github.com/ice-bit/vulcanos ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
extern isr_handler ; Defined in drivers/isr.h
extern irq_handler ; Defined in drivers/isr.h

43
kernel/cpu/kernel_loader.asm
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@ -1,43 +0,0 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; vulcanOS Kernel ;
; Developed by Marco 'icebit' Cetica ;
; (c) 2019-2021 ;
; Released under GPLv3 ;
; https://github.com/ice-bit/iceOS ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
[BITS 32] ; We should be in protected mode
section .multiboot
head_s:
dd 0xE85250D6 ; Multiboot header magic number
dd 0 ; Protected mode flag
dd head_e - head_s ; Header length
dd 0x100000000 - (0xE85250D6 + 0 + (head_e - head_s)) ; Checksum of above
; Other flags
dw 0 ; type
dw 0 ; flags
dd 0 ; size
head_e:
GLOBAL kernel_loader
EXTERN kernel_main
section .text
kernel_loader:
mov esp, kernel_stack + KERNEL_STACK_SZ ; Define stack pointer
push eax ; Set multiboot header
call kernel_main ; Jump into kernel's main function
.loop:
jmp .loop ; If the kernel returns, go into an infinite loop.
; This will prevent the CPU to run non-kernel instructions
; from the memory
KERNEL_STACK_SZ equ 4096 ; Stack size(4KiB)
section .bss
align 4
kernel_stack:
resb KERNEL_STACK_SZ ; Reserve 4 KiB

27
kernel/cpu/main.asm Normal file
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@ -0,0 +1,27 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; vulcanOS Kernel ;
; Developed by Marco 'icebit' Cetica ;
; (c) 2019-2021 ;
; Released under GPLv3 ;
; https://github.com/ice-bit/vulcanos ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
GLOBAL kernel_loader
EXTERN kernel_main
[BITS 32] ; Ensure we are in protected mode
section .text
kernel_loader:
mov esp, kernel_stack + KERNEL_STACK_SZ ; Define stack pointer
push eax ; Set multiboot header register
call kernel_main ; Call kernel's main function
.loop:
jmp .loop ; If the kernel returns, go into an endless loop
; This will prevent the CPU to execure any non-kernel
; instructions.
KERNEL_STACK_SZ equ 4096 ; Stack size(4KiB)
section .bss
align 4
kernel_stack:
resb KERNEL_STACK_SZ ; Reserver 4KiB for kernel's stack

6
kernel/cpu/ports.asm
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@ -1,10 +1,10 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; vulcanOS Kernel ;
; Developed by Marco 'icebit' Cetica ;
; (c) 2019-2021 ;
; Released under GPLv3 ;
; https://github.com/ice-bit/iceOS ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; https://github.com/ice-bit/vulcanos ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
global outb ; Output from port
global inb ; Input to port

6
kernel/drivers/cpuid.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef CPUID_H
#define CPUID_H

6
kernel/drivers/fs.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef FS_H
#define FS_H

6
kernel/drivers/gdt.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef _GDT_H_
#define _GDT_H_

6
kernel/drivers/idt.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef _IDT_H_
#define _IDT_H_

6
kernel/drivers/initrd.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef INITRD_H
#define INITRD_H
/* Ramdisk is a file system that is loaded along with the kernel

6
kernel/drivers/isr.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef _ISR_H_
#define _ISR_H_

6
kernel/drivers/keyboard.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef _KEYBOARD_H_
#define _KEYBOARD_H_

6
kernel/drivers/ports.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef _PORTS_H
#define _PORTS_H

6
kernel/drivers/timer.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef _TIMER_H_
#define _TIMER_H_

6
kernel/drivers/tty.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef _TTY_H_
#define _TTY_H_

6
kernel/kernel_main.c
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#include "drivers/tty.h"
#include "drivers/gdt.h"
#include "drivers/idt.h"

6
kernel/libc/panic.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef PANIC_H
#define PANIC_H

6
kernel/libc/stdio.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef _STDIO_H_
#define _STDIO_H_

6
kernel/libc/string.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef _STRING_H_
#define _STRING_H_

6
kernel/libc/time.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
/* Get time reading the RTC(real time clock) CMOS on the motherboard */
#ifndef TIME_H
#define TIME_H

6
kernel/mem/kheap.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
/*** Heap implementation from James Molloy's tutorial:
http://www.jamesmolloy.co.uk/tutorial_html/7.-The%20Heap.html ***/

6
kernel/mem/ordered_array.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef ORDERED_ARRAY_H
#define ORDERED_ARRAY_H

6
kernel/mem/paging.h
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@ -1,10 +1,10 @@
/**************************************
/*****************************************
* VulcanOS Kernel *
* Developed by Marco 'icebit' Cetica *
* (c) 2019-2021 *
* Released under GPLv3 *
* https://github.com/ice-bit/iceOS *
***************************************/
* https://github.com/ice-bit/vulcanos *
*****************************************/
#ifndef PAGING_H
#define PAGING_H

11
link.ld
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@ -1,17 +1,17 @@
ENTRY(kernel_loader)
SECTIONS
{
. = 1M;
.text 0x100000 :
.boot :
{
code = .; _code = .; __code = .;
*(.text)
KEEP(*(.multiboot_header))
. = ALIGN(4096);
}
.data :
.text :
{
data = .; _data = .; __data = .;
*(.data)
*(.rodata)
. = ALIGN(4096);
@ -19,7 +19,6 @@ SECTIONS
.bss :
{
bss = .; _bss = .; __bss = .;
*(.bss)
. = ALIGN(4096);
}