banan-os/kernel/arch/i386/boot.S

# Declare constants for the multiboot header
.set ALIGN,			1<<0						# align loaded modules on page boundaries
.set MEMINFO,		1<<1						# provide memory map
.set VIDEOINFO,		1<<2						# provide video info
.set MB_FLAGS,		ALIGN | MEMINFO | VIDEOINFO # this is the Multiboot 'flag' field
.set MB_MAGIC,		0x1BADB002					# 'magic number' lets bootloader find the header
.set MB_CHECKSUM,	-(MB_MAGIC + MB_FLAGS)		#checksum of above, to prove we are multiboot

# Multiboot header
.section .multiboot
	.align 4
	.long MB_MAGIC
	.long MB_FLAGS
	.long MB_CHECKSUM
	.skip 20

	.long 0
	.long 800
	.long 600
	.long 32

 # Create stack
.section .bss
	stack_bottom:
	.skip 16384		# 16 KiB
	stack_top:

.section .text
.global _start
.type _start, @function
_start:
	movl $stack_top, %esp

	pushl %eax
	pushl %ebx

	call _init

	call kernel_main

	cli
1:
	hlt
	jmp 1b

.size _start, . - _start
Changed into higher half kernel https://wiki.osdev.org/Higher_Half_x86_Bare_Bones 2022-11-13 01:04:10 +02:00			`# Declare constants for the multiboot header`
Kernel: Add video mode request for bootloader 2022-12-10 03:55:24 +02:00			`.set ALIGN, 1<<0 # align loaded modules on page boundaries`
			`.set MEMINFO, 1<<1 # provide memory map`
			`.set VIDEOINFO, 1<<2 # provide video info`
			`.set MB_FLAGS, ALIGN \| MEMINFO \| VIDEOINFO # this is the Multiboot 'flag' field`
			`.set MB_MAGIC, 0x1BADB002 # 'magic number' lets bootloader find the header`
			`.set MB_CHECKSUM, -(MB_MAGIC + MB_FLAGS) #checksum of above, to prove we are multiboot`
Changed into higher half kernel https://wiki.osdev.org/Higher_Half_x86_Bare_Bones 2022-11-13 01:04:10 +02:00
			`# Multiboot header`
Changed back to lower half kernel, since im dump. I dont see the benefit of higher half (and could not get multiboot info) 2022-11-15 00:32:07 +02:00			`.section .multiboot`
Initial commit. We have a booting kernel 2022-11-12 21:04:47 +02:00			`.align 4`
			`.long MB_MAGIC`
			`.long MB_FLAGS`
			`.long MB_CHECKSUM`
Kernel: Add time since boot to Shell 2022-12-19 11:35:24 +02:00			`.skip 20`
Kernel: Implement basic VESA Graphics mode driver We now support VESA Graphics mode with some bitmap fonts 2022-12-16 00:46:10 +02:00
Kernel: Add video mode request for bootloader 2022-12-10 03:55:24 +02:00			`.long 0`
Kernel: Implement basic VESA Graphics mode driver We now support VESA Graphics mode with some bitmap fonts 2022-12-16 00:46:10 +02:00			`.long 800`
			`.long 600`
			`.long 32`
Changed into higher half kernel https://wiki.osdev.org/Higher_Half_x86_Bare_Bones 2022-11-13 01:04:10 +02:00
			`# Create stack`
Changed back to lower half kernel, since im dump. I dont see the benefit of higher half (and could not get multiboot info) 2022-11-15 00:32:07 +02:00			`.section .bss`
Initial commit. We have a booting kernel 2022-11-12 21:04:47 +02:00			`stack_bottom:`
Changed into higher half kernel https://wiki.osdev.org/Higher_Half_x86_Bare_Bones 2022-11-13 01:04:10 +02:00			`.skip 16384 # 16 KiB`
Initial commit. We have a booting kernel 2022-11-12 21:04:47 +02:00			`stack_top:`
Changed into higher half kernel https://wiki.osdev.org/Higher_Half_x86_Bare_Bones 2022-11-13 01:04:10 +02:00
Changed back to lower half kernel, since im dump. I dont see the benefit of higher half (and could not get multiboot info) 2022-11-15 00:32:07 +02:00			`.section .text`
Initial commit. We have a booting kernel 2022-11-12 21:04:47 +02:00			`.global _start`
			`.type _start, @function`
			`_start:`
Changed back to lower half kernel, since im dump. I dont see the benefit of higher half (and could not get multiboot info) 2022-11-15 00:32:07 +02:00			`movl $stack_top, %esp`
Changed into higher half kernel https://wiki.osdev.org/Higher_Half_x86_Bare_Bones 2022-11-13 01:04:10 +02:00
Changed back to lower half kernel, since im dump. I dont see the benefit of higher half (and could not get multiboot info) 2022-11-15 00:32:07 +02:00			`pushl %eax`
			`pushl %ebx`
Changed into higher half kernel https://wiki.osdev.org/Higher_Half_x86_Bare_Bones 2022-11-13 01:04:10 +02:00
Changed back to lower half kernel, since im dump. I dont see the benefit of higher half (and could not get multiboot info) 2022-11-15 00:32:07 +02:00			`call _init`
Changed into higher half kernel https://wiki.osdev.org/Higher_Half_x86_Bare_Bones 2022-11-13 01:04:10 +02:00
Initial commit. We have a booting kernel 2022-11-12 21:04:47 +02:00			`call kernel_main`
Changed back to lower half kernel, since im dump. I dont see the benefit of higher half (and could not get multiboot info) 2022-11-15 00:32:07 +02:00
Initial commit. We have a booting kernel 2022-11-12 21:04:47 +02:00			`cli`
Changed back to lower half kernel, since im dump. I dont see the benefit of higher half (and could not get multiboot info) 2022-11-15 00:32:07 +02:00			`1:`
			`hlt`
Initial commit. We have a booting kernel 2022-11-12 21:04:47 +02:00			`jmp 1b`
Changed back to lower half kernel, since im dump. I dont see the benefit of higher half (and could not get multiboot info) 2022-11-15 00:32:07 +02:00
			`.size _start, . - _start`