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https://github.com/subhobhai943/SUB-OS.git
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88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
#include <arch/x86_64/isr.h>
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#include <arch/x86_64/idt.h>
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#include <arch/x86_64/pic.h>
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#include <kernel/printk.h>
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#include <kernel/panic.h>
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#include <lib/string.h>
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extern void* isr_stub_table[48];
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static isr_handler_t interrupt_handlers[256];
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static const char* exception_messages[32] = {
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"Division By Zero",
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"Debug",
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"Non-Maskable Interrupt",
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"Breakpoint",
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"Into Detected Overflow",
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"Out of Bounds",
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"Invalid Opcode",
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"No Coprocessor",
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"Double Fault",
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"Coprocessor Segment Overrun",
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"Bad TSS",
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"Segment Not Present",
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"Stack Fault",
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"General Protection Fault",
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"Page Fault",
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"Unknown Interrupt",
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"Coprocessor Fault",
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"Alignment Check",
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"Machine Check",
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"SIMD Floating-Point Exception",
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"Virtualization Exception",
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"Control Protection Exception",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Hypervisor Injection Exception",
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"VMM Communication Exception",
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"Security Exception",
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"Reserved"
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};
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void isr_register_handler(uint8_t int_no, isr_handler_t handler) {
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interrupt_handlers[int_no] = handler;
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}
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void isr_unregister_handler(uint8_t int_no) {
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interrupt_handlers[int_no] = NULL;
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}
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void isr_handler_common(registers_t* regs) {
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if (regs->int_no < 32) {
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// CPU Exception Fault
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printk(KERN_EMERG "\n[EXCEPTION] Vector %llu: %s (Error code: 0x%llx)\n",
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regs->int_no, exception_messages[regs->int_no], regs->error_code);
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panic_with_regs(exception_messages[regs->int_no], regs);
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}
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if (interrupt_handlers[regs->int_no] != NULL) {
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interrupt_handlers[regs->int_no](regs);
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}
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// Acknowledge Hardware PIC Interrupts (IRQs 32-47)
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if (regs->int_no >= 32 && regs->int_no < 48) {
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pic_send_eoi((uint8_t)(regs->int_no - 32));
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}
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}
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extern void isr_stub_default(void);
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void isr_init(void) {
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memset(interrupt_handlers, 0, sizeof(interrupt_handlers));
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// 1. Initialize all 256 gates to isr_stub_default
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for (int i = 0; i < 256; i++) {
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idt_set_gate(i, (void*)isr_stub_default, 0x8E);
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}
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// 2. Install dedicated CPU exception gates (0-31) and hardware IRQ gates (32-47)
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for (uint8_t i = 0; i < 48; i++) {
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idt_set_gate(i, isr_stub_table[i], 0x8E);
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}
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}
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