linux-kernel-module-cheat/baremetal/arch/aarch64/el.c

/* https://github.com/cirosantilli/linux-kernel-module-cheat#arm-exception-level */

#include <stdio.h>
#include <inttypes.h>

int main(void) {
	register uint64_t x0 __asm__ ("x0");
	__asm__ ("mrs x0, CurrentEL;" : : : "%x0");
	printf("%" PRIu64 "\n", x0 >> 2);
	return 0;
}