POC FINAL

Author: TwoUnderscorez

os.iso

@@ -0,0 +1,3 @@
+export DISPLAY=:0
+printf "\n###Running QEMU...###\n"
+qemu-system-i386 -cdrom os.iso

run.sh

@@ -2,14 +2,16 @@ global loader
  
 extern kmain
 
+; Prepare GRUB header
 MODULEALIGN equ  1<<0
 MEMINFO     equ  1<<1
 FLAGS       equ  MODULEALIGN | MEMINFO
 MAGIC       equ    0x1BADB002
 CHECKSUM    equ -(MAGIC + FLAGS)
  
 section .text
- 
+
+; Define GRUB Header
 align 4
     dd MAGIC
     dd FLAGS
@@ -18,10 +20,11 @@ align 4
 STACKSIZE equ 0x4000
  
 loader:
+	; Setup the stack
 	mov  esp, stack + STACKSIZE
-	push eax
-	push ebx
-	
+
+	push eax ; Magic number
+	push ebx ; Multiboot information
 	call kmain
 	
 	cli

src/boot/boot.asm

@@ -1,306 +1,5 @@
 #include "descriptors.h"
 
-extern void gdt_write(unsigned int);
-extern void idt_write(unsigned int);
-
-#pragma region isrs
-extern void isr0();
-extern void isr1();
-extern void isr2();
-extern void isr3();
-extern void isr4();
-extern void isr5();
-extern void isr6();
-extern void isr7();
-extern void isr8();
-extern void isr9();
-extern void isr10();
-extern void isr11();
-extern void isr12();
-extern void isr13();
-extern void isr14();
-extern void isr15();
-extern void isr16();
-extern void isr17();
-extern void isr18();
-extern void isr19();
-extern void isr20();
-extern void isr21();
-extern void isr22();
-extern void isr23();
-extern void isr24();
-extern void isr25();
-extern void isr26();
-extern void isr27();
-extern void isr28();
-extern void isr29();
-extern void isr30();
-extern void isr31();
-extern void isr32();
-extern void isr33();
-extern void isr34();
-extern void isr35();
-extern void isr36();
-extern void isr37();
-extern void isr38();
-extern void isr39();
-extern void isr40();
-extern void isr41();
-extern void isr42();
-extern void isr43();
-extern void isr44();
-extern void isr45();
-extern void isr46();
-extern void isr47();
-extern void isr48();
-extern void isr49();
-extern void isr50();
-extern void isr51();
-extern void isr52();
-extern void isr53();
-extern void isr54();
-extern void isr55();
-extern void isr56();
-extern void isr57();
-extern void isr58();
-extern void isr59();
-extern void isr60();
-extern void isr61();
-extern void isr62();
-extern void isr63();
-extern void isr64();
-extern void isr65();
-extern void isr66();
-extern void isr67();
-extern void isr68();
-extern void isr69();
-extern void isr70();
-extern void isr71();
-extern void isr72();
-extern void isr73();
-extern void isr74();
-extern void isr75();
-extern void isr76();
-extern void isr77();
-extern void isr78();
-extern void isr79();
-extern void isr80();
-extern void isr81();
-extern void isr82();
-extern void isr83();
-extern void isr84();
-extern void isr85();
-extern void isr86();
-extern void isr87();
-extern void isr88();
-extern void isr89();
-extern void isr90();
-extern void isr91();
-extern void isr92();
-extern void isr93();
-extern void isr94();
-extern void isr95();
-extern void isr96();
-extern void isr97();
-extern void isr98();
-extern void isr99();
-extern void isr100();
-extern void isr101();
-extern void isr102();
-extern void isr103();
-extern void isr104();
-extern void isr105();
-extern void isr106();
-extern void isr107();
-extern void isr108();
-extern void isr109();
-extern void isr110();
-extern void isr111();
-extern void isr112();
-extern void isr113();
-extern void isr114();
-extern void isr115();
-extern void isr116();
-extern void isr117();
-extern void isr118();
-extern void isr119();
-extern void isr120();
-extern void isr121();
-extern void isr122();
-extern void isr123();
-extern void isr124();
-extern void isr125();
-extern void isr126();
-extern void isr127();
-extern void isr128();
-extern void isr129();
-extern void isr130();
-extern void isr131();
-extern void isr132();
-extern void isr133();
-extern void isr134();
-extern void isr135();
-extern void isr136();
-extern void isr137();
-extern void isr138();
-extern void isr139();
-extern void isr140();
-extern void isr141();
-extern void isr142();
-extern void isr143();
-extern void isr144();
-extern void isr145();
-extern void isr146();
-extern void isr147();
-extern void isr148();
-extern void isr149();
-extern void isr150();
-extern void isr151();
-extern void isr152();
-extern void isr153();
-extern void isr154();
-extern void isr155();
-extern void isr156();
-extern void isr157();
-extern void isr158();
-extern void isr159();
-extern void isr160();
-extern void isr161();
-extern void isr162();
-extern void isr163();
-extern void isr164();
-extern void isr165();
-extern void isr166();
-extern void isr167();
-extern void isr168();
-extern void isr169();
-extern void isr170();
-extern void isr171();
-extern void isr172();
-extern void isr173();
-extern void isr174();
-extern void isr175();
-extern void isr176();
-extern void isr177();
-extern void isr178();
-extern void isr179();
-extern void isr180();
-extern void isr181();
-extern void isr182();
-extern void isr183();
-extern void isr184();
-extern void isr185();
-extern void isr186();
-extern void isr187();
-extern void isr188();
-extern void isr189();
-extern void isr190();
-extern void isr191();
-extern void isr192();
-extern void isr193();
-extern void isr194();
-extern void isr195();
-extern void isr196();
-extern void isr197();
-extern void isr198();
-extern void isr199();
-extern void isr200();
-extern void isr201();
-extern void isr202();
-extern void isr203();
-extern void isr204();
-extern void isr205();
-extern void isr206();
-extern void isr207();
-extern void isr208();
-extern void isr209();
-extern void isr210();
-extern void isr211();
-extern void isr212();
-extern void isr213();
-extern void isr214();
-extern void isr215();
-extern void isr216();
-extern void isr217();
-extern void isr218();
-extern void isr219();
-extern void isr220();
-extern void isr221();
-extern void isr222();
-extern void isr223();
-extern void isr224();
-extern void isr225();
-extern void isr226();
-extern void isr227();
-extern void isr228();
-extern void isr229();
-extern void isr230();
-extern void isr231();
-extern void isr232();
-extern void isr233();
-extern void isr234();
-extern void isr235();
-extern void isr236();
-extern void isr237();
-extern void isr238();
-extern void isr239();
-extern void isr240();
-extern void isr241();
-extern void isr242();
-extern void isr243();
-extern void isr244();
-extern void isr245();
-extern void isr246();
-extern void isr247();
-extern void isr248();
-extern void isr249();
-extern void isr250();
-extern void isr251();
-extern void isr252();
-extern void isr253();
-extern void isr254();
-extern void isr255();
-#pragma endregion
-
-// A struct that represents a line in the GDT
-struct gdt_entry_struct { 
-    unsigned short limit_low;
-    unsigned short base_low;
-    unsigned char  base_middle;
-    unsigned char  access;
-    unsigned char  granularity; // 4 bits of the limit and 4 bits which are flags
-    unsigned char  base_high;
-} __attribute__((packed)); //No padding
-
-typedef struct gdt_entry_struct gdt_entry_t;
-
-// A struct that represents the pointer passed to lgdt (a.k.a. GDT descriptor)
-struct gdt_ptr_struct {
-    unsigned short limit;
-    unsigned int base;
-} __attribute__((packed));
-
-typedef struct gdt_ptr_struct gdt_ptr_t;
-
-// A struct that represents a line in the IDT
-struct idt_entry_struct{
-    unsigned short base_low;
-    unsigned short selector;
-    unsigned char  always0;
-    unsigned char  flags;
-    unsigned short base_high;
-} __attribute__((packed));
-
-typedef struct idt_entry_struct idt_entry_t;
-
-// A struct that represents the pointer passed to lidt (a.k.a. IDT descriptor)
-struct idt_ptr_struct{
-    unsigned short limit;
-    unsigned int base;
-} __attribute__((packed));
-
-typedef struct idt_ptr_struct idt_ptr_t;
-
 // Define GDT
 gdt_entry_t gdt_entries[5];
 // Define IDT
@@ -338,7 +37,7 @@ void idt_set_gate(int index,unsigned int base, unsigned short selector, unsigned
 	idt_entries[index].base_high = (base >> 16) & 0xFFFF;
 	idt_entries[index].selector = selector;
 	idt_entries[index].always0 = 0;
-	idt_entries[index].flags   = flags;
+	idt_entries[index].flags = flags;
 }
 
 // Setup the IDT