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         struct pf_errcode 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         int a = *(int *) (0xa0000000);
  31 }
  32
  33 __attribute__((interrupt))
  34 void pf_handler(struct fault_frame *frame)
  35 {
  36         int address;
  37         struct pf_errcode errcode = frame->error_code;
  38         asm ("mov %%cr2, %0": "=a" (address));
  39         kprint("A page fault occurred!\n", VGA_COLOR_DARK_RED);
  40         kprint("Faulting address: ", 0);
  41         kprintd(address);
  42         kprint("\n", 0);
  43         if (!errcode.p) {
  44                 kprint("Address points to non-mapped page\n", 0);
  45         }
  46         if (errcode.wr) {
  47                 kprint("Fault occurred while writing to memory\n", 0);
  48         } else {
  49                 kprint("Fault occurred while reading from memory\n", 0);
  50         }
  51         if (errcode.id) {
  52                 kprint("Fault occurred while fetching instruction\n", 0);
  53         }
  54         asm("cli");
  55 halt:
  56         asm("hlt");
  57         goto halt;
  58 }
  59
  60 __attribute__((interrupt))
  61 void double_fault(struct abort_frame *frame)
  62 {
  63         *(volatile uint32_t *) (0xb8000) = 0xcf28cf3a;
  64 halt:
  65         asm volatile ("cli; hlt");
  66         goto halt;
  67 }
  68