int __init vsyscall_init(void)
{
printk("VSYSCALL: consistency checks...");
if ((unsigned long) &vgettimeofday != VSYSCALL_ADDR(__NR_vgettimeofday)) {
printk("vgettimeofday link addr broken\n");
printk("VSYSCALL: vsyscall_init failed!\n");
return -EFAULT;
}
if ((unsigned long) &vtime != VSYSCALL_ADDR(__NR_vtime)) {
printk("vtime link addr broken\n");
printk("VSYSCALL: vsyscall_init failed!\n");
return -EFAULT;
}
if (VSYSCALL_ADDR(0) != __fix_to_virt(FIX_VSYSCALL_GTOD_FIRST_PAGE)) {
printk("fixmap first vsyscall 0x%lx should be 0x%x\n",
__fix_to_virt(FIX_VSYSCALL_GTOD_FIRST_PAGE),
VSYSCALL_ADDR(0));
printk("VSYSCALL: vsyscall_init failed!\n");
return -EFAULT;
}
printk("passed...mapping...");
map_vsyscall();
printk("done.\n");
vsyscall_mapped = 1;
printk("VSYSCALL: fixmap virt addr: 0x%lx\n",
__fix_to_virt(FIX_VSYSCALL_GTOD_FIRST_PAGE));
return 0;
}
static int __init vsyscall_init(void)
{
if ((unsigned long) &vgettimeofday != VSYSCALL_ADDR(__NR_vgettimeofday))
panic("vgettimeofday link addr broken");
if ((unsigned long) &vtime != VSYSCALL_ADDR(__NR_vtime))
panic("vtime link addr broken");
if (VSYSCALL_ADDR(0) != __fix_to_virt(VSYSCALL_FIRST_PAGE))
panic("fixmap first vsyscall %lx should be %lx", __fix_to_virt(VSYSCALL_FIRST_PAGE),
VSYSCALL_ADDR(0));
map_vsyscall();
return 0;
}
static int __init vsyscall_init(void)
{
BUG_ON(VSYSCALL_ADDR(0) != __fix_to_virt(VSYSCALL_FIRST_PAGE));
on_each_cpu(cpu_vsyscall_init, NULL, 1);
/* notifier priority > KVM */
hotcpu_notifier(cpu_vsyscall_notifier, 30);
return 0;
}
/* Get the current time of day and timezone information,
putting it into *TV and *TZ. If TZ is NULL, *TZ is not filled.
Returns 0 on success, -1 on errors. */
int
__gettimeofday (struct timeval *tv, struct timezone *tz)
{
/* We're using a virtual syscall here. */
int (*__vgettimeofday)(struct timeval *, struct timezone *)
= (int (*)(struct timeval *, struct timezone *)) VSYSCALL_ADDR (__NR_vgettimeofday);
return __vgettimeofday (tv, tz);
}
// This can go away when RHEL5 support is no longer needed
int
sched_getcpu(void)
{
getcpu_p getcpu = (getcpu_p)VSYSCALL_ADDR(__NR_vgetcpu);
unsigned cpu = 0;
int status = -1;
status = getcpu(&cpu, NULL, NULL);
return (status == -1) ? status : (int)cpu;
}
static int __init vsyscall_init(void)
{
// L4Linux: This is all wrong, and will probably trigger with the
// first user using this...
#ifndef CONFIG_L4
BUG_ON(VSYSCALL_ADDR(0) != __fix_to_virt(VSYSCALL_FIRST_PAGE));
#endif
on_each_cpu(cpu_vsyscall_init, NULL, 1);
/* notifier priority > KVM */
hotcpu_notifier(cpu_vsyscall_notifier, 30);
return 0;
}
