#include "fault.h"
#include "sim.h"
#include <signal.h>
#include <time.h>

static struct simulator *sim;

static void sigsegv_handler(int sig, siginfo_t *info, void *ucontext)
{
	(void) sig;
	(void) ucontext;

	const char *inner = "";
	switch (info->si_code) {
	case SEGV_MAPERR:
		inner = ": address not mapped to object";
		break;
	case SEGV_ACCERR:
		inner = ": invalid premissions for mapped object";
		break;
	case SEGV_BNDERR:
		inner = ": failed address bound checks";
		break;
	case SEGV_PKUERR:
		inner = ": access was denied by memory protection";
		break;
	}

	sim_dump(sim, "page fault at %p%s", info->si_addr, inner);
}

static void sigfpe_handler(int sig, siginfo_t *info, void *ucontext)
{
	(void) sig;
	(void) info;
	(void) ucontext;

	sim_dump(sim, "floating point exception");

}

void init_handlers(struct simulator *s)
{
	struct sigaction act = {0};
	sim = s;

	/* sigsegv */
	act.sa_sigaction = sigsegv_handler;
	act.sa_flags = SA_SIGINFO;
	sigaction(SIGSEGV, &act, NULL);

	/* sigfpe */
	act.sa_sigaction = sigfpe_handler;
	act.sa_flags = SA_SIGINFO;
	sigaction(SIGFPE, &act, NULL);
}