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POC FINAL
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@TwoUnderscorez
TwoUnderscorez committed Nov 12, 2017
1 parent 9afa40a commit 2835072
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Showing 10 changed files with 348 additions and 317 deletions.
Binary file modified os.iso
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3 changes: 3 additions & 0 deletions run.sh
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Original file line number Diff line number Diff line change
@@ -0,0 +1,3 @@
export DISPLAY=:0
printf "\n###Running QEMU...###\n"
qemu-system-i386 -cdrom os.iso
11 changes: 7 additions & 4 deletions src/boot/boot.asm
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Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand All @@ -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
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303 changes: 1 addition & 302 deletions src/kernel/descriptors.c
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@@ -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
Expand Down Expand Up @@ -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
Expand Down
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