ia32_lstar.c

#include <linux/module.h>

static inline uint64_t exec_rdmsr(uint64_t msr)
{
	uint32_t low, high;
	asm volatile (
		"rdmsr"
		: "=a"(low), "=d"(high)
		: "c"(msr)
	);
	return ((uint64_t)high << 32) | low;
}

static int mymodule_init(void)
{
	uint64_t res = exec_rdmsr(0xc0000082U);
	printk(KERN_INFO "MOLY: MSR_IA32_LSTAR: %llx\n", res);
	return 0;
}
static void mymodule_exit(void)
{
}

module_init(mymodule_init);
module_exit(mymodule_exit);