CPU

This folder contains the interrupt handlers that asm and C use to communicate with the cpu. If a fault happens, it will be called here.

Faults

    "Division By Zero",
    "Debug",
    "Non Maskable Interrupt",
    "Breakpoint",
    "Into Detected Overflow",
    "Out of Bounds",
    "Invalid Opcode",
    "No Coprocessor",
    "Double Fault",
    "Coprocessor Segment Overrun",
    "Bad TSS",
    "Segment Not Present",
    "Stack Fault",
    "General Protection Fault",
    "Page Fault",
    "Unknown Interrupt",
    "Coprocessor Fault",
    "Alignment Check",
    "Machine Check",
    "Reserved",
    "Reserved",
    "Reserved",
    "Reserved",
    "Reserved",
    "Reserved",
    "Reserved",
    "Reserved",
    "Reserved",
    "Reserved",
    "Reserved",
    "Reserved",
    "Reserved"

---

gdt

The gdt interrupts

Functions

void gdt_set_gate(int num, unsigned long base, unsigned long limit, unsigned char access, unsigned char gran);
void gdt_install(); 

idt

The idt

Functions

void idt_set_gate(unsigned char num, unsigned long base, unsigned short sel, unsigned char flags);
void idt_install();

irq

The irq

Functions

void irq_install();
void irq_install_handler();
void irq_uninstall_handler();

isr

The fault handler

Functions

void isr_install();

struct regs
{
    unsigned int gs, fs, es, ds;      /* pushed the segs last */
    unsigned int edi, esi, ebp, esp, ebx, edx, ecx, eax;  /* pushed by 'pusha' */
    unsigned int int_no, err_code;    /* our 'push byte #' and ecodes do this */
    unsigned int eip, cs, eflags, useresp, ss;   /* pushed by the processor automatically */ 
};

void fault_handler(struct regs *r);