76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
#include "exception.h"
|
|
#include "cpu_context.h"
|
|
#include "idt.h"
|
|
#include "interrupt.h"
|
|
#include "irq.h"
|
|
#include "klibc.h"
|
|
#include "kthread.h"
|
|
#include "vga.h"
|
|
|
|
exception_handler exception_handler_array[EXCEPTION_NUM] = {
|
|
NULL,
|
|
};
|
|
|
|
extern vaddr_t exception_handler_wrapper_array[EXCEPTION_NUM];
|
|
|
|
void exception_handler_wrap(int intr, struct cpu_state *frame)
|
|
{
|
|
if (0 > intr || EXCEPTION_NUM <= intr) {
|
|
pr_err("Trying to handle unknow exception %d\n", intr);
|
|
return;
|
|
}
|
|
|
|
if (exception_handler_array[intr] != NULL)
|
|
exception_handler_array[intr](frame, intr);
|
|
}
|
|
|
|
int exceptionSetRoutine(int exception, exception_handler handler)
|
|
{
|
|
uint32_t flags;
|
|
if ((exception < 0) || exception >= EXCEPTION_NUM)
|
|
return -1;
|
|
|
|
disable_IRQs(flags);
|
|
|
|
exception_handler_array[exception] = handler;
|
|
|
|
idt_set_handler(EXCEPTION_INTERRUPT_BASE_ADDRESS + exception,
|
|
(unsigned int)exception_handler_wrapper_array[exception], 0);
|
|
restore_IRQs(flags);
|
|
return 0;
|
|
}
|
|
|
|
void print_handler(struct cpu_state *frame, ulong intr)
|
|
{
|
|
int intNbInt = intr;
|
|
VGAPrintf(RED, BLACK, 0, VGA_HEIGHT - 1, "EXCEPTION %d %d", intNbInt, intr);
|
|
printf("Exception %d (Err %d) at 0x%x\n", intr, intr,
|
|
cpu_context_get_PC(frame));
|
|
asm("hlt");
|
|
}
|
|
|
|
void pagefault_handler(struct cpu_state *frame, ulong intr)
|
|
{
|
|
// A page fault has occurred.
|
|
// The faulting address is stored in the CR2 register.
|
|
uint32_t faulting_address;
|
|
asm volatile("mov %%cr2, %0" : "=r"(faulting_address));
|
|
|
|
struct kthread *current = getCurrentThread();
|
|
printf("page fault while in thread %s at 0x%x 0x%x\n", current->name, faulting_address,
|
|
cpu_context_get_PC(frame));
|
|
VGAPrintf(RED, BLACK, 0, VGA_HEIGHT - 1, "PAGE FAULT %d", intr);
|
|
(void)intr;
|
|
for (;;)
|
|
continue;
|
|
}
|
|
|
|
int exceptionSetup()
|
|
{
|
|
for (int i = 0; i < EXCEPTION_NUM; i++) {
|
|
exceptionSetRoutine(i, print_handler);
|
|
}
|
|
exceptionSetRoutine(EXCEPTION_PAGE_FAULT, pagefault_handler);
|
|
return 0;
|
|
}
|