src/kernel/x86_32/faults.c

#include "pic.h"
#include <log.h>

#define DECLARE_INTERRUPT(sym, name)                                           \
	static void sym##_h(struct registers *regs)                                \
	{                                                                          \
		kprintf(ERROR "Fault " name ": eip = 0x%x, err = 0x%x\n", regs->eip,   \
				regs->error_code);                                             \
		asm volatile("cli");                                                   \
		kpanic(name);                                                          \
	}

#define ADD_INTERRUPT(sym, num) add_interrupt_handler(num, sym##_h)

DECLARE_INTERRUPT(gp, "#GP");

static void pf_h(struct registers *regs)
{
	uint err = regs->error_code;

	kprintf(ERROR "Fault #PF: eip=0x%x, err=0x%x\n", regs->eip, err);
	kprintf("\tDue to: %c%c%c%c\n",
			err & 1 ? 'P' : ' ',
			err & (1<<1) ? 'W' : ' ',
			err & (1<<2) ? 'U' : ' ',
			err & (1<<4) ? 'I' : ' ');

	asm("cli");
	kpanic("#PF");
}

void init_faults()
{
	ADD_INTERRUPT(gp, 13);
	ADD_INTERRUPT(pf, 14);
}