chibicitiberiu/luxos
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luxos/Kernel/loader.asm

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[GOOD] BUILD 0.1.0.450 DATE 8/29/2011 AT 10:30 AM ==================================================== + Changed 'align 0x4' line above multiboot header in loader.asm to 'align 4' + Removed -e option for echo in build.sh + Modified build.sh for linux + Fixed triple fault when enabling paging + Fixed page faults at memory manager initialization + Fixed 'mem' console function + Added more info about page fault at crash screen + Added Panic() macro + Added verbose mode for memory manager [ BAD] BUILD 0.1.0.390 DATE 8/27/2011 AT 10:54 PM ==================================================== + Added stdlib routines, separated in different files + Rewritten physical memory manager + Added virtual mem manager + Added memory allocation/freeing + Added memory library + Added temporary allocation (at end of kernel), until paging is started - Removed functionality from debug console function 'mem' - Removed system.h, the one remaining function now in stdio.h
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bits 32
global start
; multiboot header
MODULEALIGN equ 1<<0
MEMINFO equ 1<<1
VIDEOINFO equ 1<<2
FLAGS equ MODULEALIGN | MEMINFO | VIDEOINFO
MAGIC equ 0x1BADB002
CHECKSUM equ -(MAGIC + FLAGS)
align 4
section .__mbHeader
MultiBootHeader:
dd MAGIC
dd FLAGS
dd CHECKSUM
section .text
STACKSIZE equ 0x4000 ; that's 16k.
start:
XCHG BX, BX ; magic breakpoint
mov ecx, eax
[????] BUILD 0.1.1.??? DATE 9/0?/2011 AT ?:?? ?? ==================================================== Mainly changed: Tasking + Implemented multitasking
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; setup initial stack
[GOOD] BUILD 0.1.0.450 DATE 8/29/2011 AT 10:30 AM ==================================================== + Changed 'align 0x4' line above multiboot header in loader.asm to 'align 4' + Removed -e option for echo in build.sh + Modified build.sh for linux + Fixed triple fault when enabling paging + Fixed page faults at memory manager initialization + Fixed 'mem' console function + Added more info about page fault at crash screen + Added Panic() macro + Added verbose mode for memory manager [ BAD] BUILD 0.1.0.390 DATE 8/27/2011 AT 10:54 PM ==================================================== + Added stdlib routines, separated in different files + Rewritten physical memory manager + Added virtual mem manager + Added memory allocation/freeing + Added memory library + Added temporary allocation (at end of kernel), until paging is started - Removed functionality from debug console function 'mem' - Removed system.h, the one remaining function now in stdio.h
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mov esp, stack+STACKSIZE
[????] BUILD 0.1.1.??? DATE 9/0?/2011 AT ?:?? ?? ==================================================== Mainly changed: Tasking + Implemented multitasking
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; Verify booted with multiboot compliant bootloader
[GOOD] BUILD 0.1.0.450 DATE 8/29/2011 AT 10:30 AM ==================================================== + Changed 'align 0x4' line above multiboot header in loader.asm to 'align 4' + Removed -e option for echo in build.sh + Modified build.sh for linux + Fixed triple fault when enabling paging + Fixed page faults at memory manager initialization + Fixed 'mem' console function + Added more info about page fault at crash screen + Added Panic() macro + Added verbose mode for memory manager [ BAD] BUILD 0.1.0.390 DATE 8/27/2011 AT 10:54 PM ==================================================== + Added stdlib routines, separated in different files + Rewritten physical memory manager + Added virtual mem manager + Added memory allocation/freeing + Added memory library + Added temporary allocation (at end of kernel), until paging is started - Removed functionality from debug console function 'mem' - Removed system.h, the one remaining function now in stdio.h
2021-09-14 15:48:57 +00:00
cmp ecx, 0x2BADB002
jne .bad
[????] BUILD 0.1.1.??? DATE 9/0?/2011 AT ?:?? ?? ==================================================== Mainly changed: Tasking + Implemented multitasking
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push esp
[GOOD] BUILD 0.1.0.450 DATE 8/29/2011 AT 10:30 AM ==================================================== + Changed 'align 0x4' line above multiboot header in loader.asm to 'align 4' + Removed -e option for echo in build.sh + Modified build.sh for linux + Fixed triple fault when enabling paging + Fixed page faults at memory manager initialization + Fixed 'mem' console function + Added more info about page fault at crash screen + Added Panic() macro + Added verbose mode for memory manager [ BAD] BUILD 0.1.0.390 DATE 8/27/2011 AT 10:54 PM ==================================================== + Added stdlib routines, separated in different files + Rewritten physical memory manager + Added virtual mem manager + Added memory allocation/freeing + Added memory library + Added temporary allocation (at end of kernel), until paging is started - Removed functionality from debug console function 'mem' - Removed system.h, the one remaining function now in stdio.h
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push ebx
extern k_main
call k_main
[????] BUILD 0.1.1.??? DATE 9/0?/2011 AT ?:?? ?? ==================================================== Mainly changed: Tasking + Implemented multitasking
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cli
hlt
[GOOD] BUILD 0.1.0.450 DATE 8/29/2011 AT 10:30 AM ==================================================== + Changed 'align 0x4' line above multiboot header in loader.asm to 'align 4' + Removed -e option for echo in build.sh + Modified build.sh for linux + Fixed triple fault when enabling paging + Fixed page faults at memory manager initialization + Fixed 'mem' console function + Added more info about page fault at crash screen + Added Panic() macro + Added verbose mode for memory manager [ BAD] BUILD 0.1.0.390 DATE 8/27/2011 AT 10:54 PM ==================================================== + Added stdlib routines, separated in different files + Rewritten physical memory manager + Added virtual mem manager + Added memory allocation/freeing + Added memory library + Added temporary allocation (at end of kernel), until paging is started - Removed functionality from debug console function 'mem' - Removed system.h, the one remaining function now in stdio.h
2021-09-14 15:48:57 +00:00
; Show error message, and halt system
.bad:
extern ConsoleClear
extern ConsoleWrite
extern CommandOsver
call ConsoleClear
call CommandOsver
mov eax, [ErrorColor]
push eax
push ErrorString
call ConsoleWrite
cli
hlt
; some variables
ErrorString db 0xA, "%#! Fatal error: Not booted with multiboot compliant bootloader (e.g. GRUB).", 0x0
ErrorColor db 0x0C
; stack
section .bss
align 32
stack:
[????] BUILD 0.1.1.??? DATE 9/0?/2011 AT ?:?? ?? ==================================================== Mainly changed: Tasking + Implemented multitasking
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resb STACKSIZE ; This reserves memory for stack
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