76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
#include "exception.h"
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#include "cpu_context.h"
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#include "idt.h"
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#include "interrupt.h"
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#include "irq.h"
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#include "klibc.h"
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#include "thread.h"
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#include "vga.h"
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exception_handler exception_handler_array[EXCEPTION_NUM] = {
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NULL,
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};
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extern vaddr_t exception_handler_wrapper_array[EXCEPTION_NUM];
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void exception_handler_wrap(int intr, struct cpu_state *frame)
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{
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if (0 > intr || EXCEPTION_NUM <= intr) {
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pr_err("Trying to handle unknow exception %d\n", intr);
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return;
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}
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if (exception_handler_array[intr] != NULL)
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exception_handler_array[intr](frame, intr);
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}
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int exceptionSetRoutine(int exception, exception_handler handler)
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{
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uint32_t flags;
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if ((exception < 0) || exception >= EXCEPTION_NUM)
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return -1;
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disable_IRQs(flags);
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exception_handler_array[exception] = handler;
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idt_set_handler(EXCEPTION_INTERRUPT_BASE_ADDRESS + exception,
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(unsigned int)exception_handler_wrapper_array[exception], 0);
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restore_IRQs(flags);
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return 0;
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}
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void print_handler(struct cpu_state *frame, ulong intr)
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{
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int intNbInt = intr;
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VGAPrintf(RED, BLACK, 0, VGA_HEIGHT - 1, "EXCEPTION %d %d", intNbInt, intr);
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printf("Exception %d (Err %d) at 0x%x\n", intr, intr,
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cpu_context_get_PC(frame));
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asm("hlt");
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}
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void pagefault_handler(struct cpu_state *frame, ulong intr)
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{
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struct thread *current = getCurrentThread();
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printf("page fault while in thread %s code at 0x%x when trying to access 0x%x err_code 0x%x\n", current->name,
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cpu_context_get_PC(frame), cpu_context_get_EX_faulting_vaddr(frame), cpu_context_get_EX_err(frame));
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if (cpu_context_is_in_user_mode(frame)) {
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printf("Killing User Thread\n");
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threadExit();
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}
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VGAPrintf(RED, BLACK, 0, VGA_HEIGHT - 1, "PAGE FAULT %d", intr);
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(void)intr;
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for (;;)
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continue;
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}
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int exceptionSetup()
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{
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for (int i = 0; i < EXCEPTION_NUM; i++) {
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exceptionSetRoutine(i, print_handler);
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}
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exceptionSetRoutine(EXCEPTION_PAGE_FAULT, pagefault_handler);
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return 0;
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}
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