prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000000))
mremap(&(0x7f0000cc1000/0x4000)=nil, 0x4000, 0x1000, 0x0, &(0x7f0000fff000/0x1000)=nil)