kernel/arch/x86/irq/sample_handler.c

   1 #include <tty.h>
   2 #include <irq/i8259a.h>
   3 #include <io.h>
   4 #include <stdint.h>
   5 #include <mm/paging.h>
   6
   7 typedef uint32_t uword_t;
   8
   9 struct interrupt_frame {
  10         uword_t ip;
  11         uword_t cs;
  12         uword_t flags;
  13 };
  14
  15 struct fault_frame {
  16         uint32_t error_code;
  17         uintptr_t eip;
  18         uint16_t cs;
  19         uint32_t eflags;
  20 };
  21
  22 struct abort_frame;
  23
  24 __attribute__((interrupt))
  25 void keyb_handler(struct interrupt_frame *frame)
  26 {
  27         pic_send_eoi(1);
  28         kprint("Got a keyboard interrupt!\n", 0);
  29         inb(0x60);
  30 }
  31
  32 __attribute__((interrupt))
  33 void pf_handler(struct fault_frame *frame)
  34 {
  35         struct pf_errcode *errcode = &(frame->error_code);
  36         kprint("A page fault occurred!\n", VGA_COLOR_DARK_RED);
  37         if (errcode->p) {
  38                 kprint("Attempted to access non-present page\n", 0);
  39         }
  40         if (errcode->wr) {
  41                 kprint("Kernel attempted to write to page\n", 0);
  42         } else kprint("Kernel attempted to read from page\n", 0);
  43         if (errcode->id) {
  44                 kprint("Fault occurred while fetching instruction\n", 0);
  45         }
  46         int cr2;
  47         asm ("mov %%cr2, %0": "=a" (cr2));
  48         kprint("CR2: ", 0);
  49         kprintd(cr2);
  50 halt:
  51         asm ("cli; hlt");
  52         goto halt;
  53 }
  54
  55 __attribute__((interrupt))
  56 void double_fault(struct abort_frame *frame)
  57 {
  58         *(volatile uint32_t *) (0xb8000) = 0xcf28cf3a;
  59 halt:
  60         asm volatile ("cli; hlt");
  61         goto halt;
  62 }
  63