diff --git a/mak/COPY b/mak/COPY
index e645779c49..9d439ce724 100644
--- a/mak/COPY
+++ b/mak/COPY
@@ -96,6 +96,7 @@ COPY=\
 	$(IMPDIR)\core\sys\linux\ifaddrs.d \
 	$(IMPDIR)\core\sys\linux\link.d \
 	$(IMPDIR)\core\sys\linux\sched.d \
+	$(IMPDIR)\core\sys\linux\syscalls.d \
 	$(IMPDIR)\core\sys\linux\termios.d \
 	$(IMPDIR)\core\sys\linux\time.d \
 	$(IMPDIR)\core\sys\linux\timerfd.d \
diff --git a/src/core/sys/linux/syscalls.d b/src/core/sys/linux/syscalls.d
new file mode 100644
index 0000000000..f7fe6d033b
--- /dev/null
+++ b/src/core/sys/linux/syscalls.d
@@ -0,0 +1,742 @@
+module core.sys.linux.syscalls;
+
+import core.sys.posix.sys.types : c_long;
+
+version(linux):
+extern(C):
+
+version(CoreDdoc)
+{
+    /// Linux system call number from Linux's asm/unistd.h
+    enum SYS : c_long;
+}
+version(X86_64)
+{
+    // https://github.com/torvalds/linux/blob/v4.14/arch/sh/include/uapi/asm/unistd_64.h
+    // https://github.com/torvalds/linux/blob/v4.14/arch/x86/entry/syscalls/syscall_64.tbl
+    enum SYS : c_long
+    {
+        read = 0,
+        write = 1,
+        open = 2,
+        close = 3,
+        stat = 4,
+        fstat = 5,
+        lstat = 6,
+        poll = 7,
+        lseek = 8,
+        mmap = 9,
+        mprotect = 10,
+        munmap = 11,
+        brk = 12,
+        rt_sigaction = 13,
+        rt_sigprocmask = 14,
+        rt_sigreturn = 15,
+        ioctl = 16,
+        pread64 = 17,
+        pwrite64 = 18,
+        readv = 19,
+        writev = 20,
+        access = 21,
+        pipe = 22,
+        select = 23,
+        sched_yield = 24,
+        mremap = 25,
+        msync = 26,
+        mincore = 27,
+        madvise = 28,
+        shmget = 29,
+        shmat = 30,
+        shmctl = 31,
+        dup = 32,
+        dup2 = 33,
+        pause = 34,
+        nanosleep = 35,
+        getitimer = 36,
+        alarm = 37,
+        setitimer = 38,
+        getpid = 39,
+        sendfile = 40,
+        socket = 41,
+        connect = 42,
+        accept = 43,
+        sendto = 44,
+        recvfrom = 45,
+        sendmsg = 46,
+        recvmsg = 47,
+        shutdown = 48,
+        bind = 49,
+        listen = 50,
+        getsockname = 51,
+        getpeername = 52,
+        socketpair = 53,
+        setsockopt = 54,
+        getsockopt = 55,
+        clone = 56,
+        fork = 57,
+        vfork = 58,
+        execve = 59,
+        exit = 60,
+        wait4 = 61,
+        kill = 62,
+        uname = 63,
+        semget = 64,
+        semop = 65,
+        semctl = 66,
+        shmdt = 67,
+        msgget = 68,
+        msgsnd = 69,
+        msgrcv = 70,
+        msgctl = 71,
+        fcntl = 72,
+        flock = 73,
+        fsync = 74,
+        fdatasync = 75,
+        truncate = 76,
+        ftruncate = 77,
+        getdents = 78,
+        getcwd = 79,
+        chdir = 80,
+        fchdir = 81,
+        rename = 82,
+        mkdir = 83,
+        rmdir = 84,
+        creat = 85,
+        link = 86,
+        unlink = 87,
+        symlink = 88,
+        readlink = 89,
+        chmod = 90,
+        fchmod = 91,
+        chown = 92,
+        fchown = 93,
+        lchown = 94,
+        umask = 95,
+        gettimeofday = 96,
+        getrlimit = 97,
+        getrusage = 98,
+        sysinfo = 99,
+        times = 100,
+        ptrace = 101,
+        getuid = 102,
+        syslog = 103,
+        getgid = 104,
+        setuid = 105,
+        setgid = 106,
+        geteuid = 107,
+        getegid = 108,
+        setpgid = 109,
+        getppid = 110,
+        getpgrp = 111,
+        setsid = 112,
+        setreuid = 113,
+        setregid = 114,
+        getgroups = 115,
+        setgroups = 116,
+        setresuid = 117,
+        getresuid = 118,
+        setresgid = 119,
+        getresgid = 120,
+        getpgid = 121,
+        setfsuid = 122,
+        setfsgid = 123,
+        getsid = 124,
+        capget = 125,
+        capset = 126,
+        rt_sigpending = 127,
+        rt_sigtimedwait = 128,
+        rt_sigqueueinfo = 129,
+        rt_sigsuspend = 130,
+        sigaltstack = 131,
+        utime = 132,
+        mknod = 133,
+        uselib = 134,
+        personality = 135,
+        ustat = 136,
+        statfs = 137,
+        fstatfs = 138,
+        sysfs = 139,
+        getpriority = 140,
+        setpriority = 141,
+        sched_setparam = 142,
+        sched_getparam = 143,
+        sched_setscheduler = 144,
+        sched_getscheduler = 145,
+        sched_get_priority_max = 146,
+        sched_get_priority_min = 147,
+        sched_rr_get_interval = 148,
+        mlock = 149,
+        munlock = 150,
+        mlockall = 151,
+        munlockall = 152,
+        vhangup = 153,
+        modify_ldt = 154,
+        pivot_root = 155,
+        _sysctl = 156,
+        prctl = 157,
+        arch_prctl = 158,
+        adjtimex = 159,
+        setrlimit = 160,
+        chroot = 161,
+        sync = 162,
+        acct = 163,
+        settimeofday = 164,
+        mount = 165,
+        umount2 = 166,
+        swapon = 167,
+        swapoff = 168,
+        reboot = 169,
+        sethostname = 170,
+        setdomainname = 171,
+        iopl = 172,
+        ioperm = 173,
+        create_module = 174,
+        init_module = 175,
+        delete_module = 176,
+        get_kernel_syms = 177,
+        query_module = 178,
+        quotactl = 179,
+        nfsservctl = 180,
+        getpmsg = 181,
+        putpmsg = 182,
+        afs_syscall = 183,
+        tuxcall = 184,
+        security = 185,
+        gettid = 186,
+        readahead = 187,
+        setxattr = 188,
+        lsetxattr = 189,
+        fsetxattr = 190,
+        getxattr = 191,
+        lgetxattr = 192,
+        fgetxattr = 193,
+        listxattr = 194,
+        llistxattr = 195,
+        flistxattr = 196,
+        removexattr = 197,
+        lremovexattr = 198,
+        fremovexattr = 199,
+        tkill = 200,
+        time = 201,
+        futex = 202,
+        sched_setaffinity = 203,
+        sched_getaffinity = 204,
+        set_thread_area = 205,
+        io_setup = 206,
+        io_destroy = 207,
+        io_getevents = 208,
+        io_submit = 209,
+        io_cancel = 210,
+        get_thread_area = 211,
+        lookup_dcookie = 212,
+        epoll_create = 213,
+        epoll_ctl_old = 214,
+        epoll_wait_old = 215,
+        remap_file_pages = 216,
+        getdents64 = 217,
+        set_tid_address = 218,
+        restart_syscall = 219,
+        semtimedop = 220,
+        fadvise64 = 221,
+        timer_create = 222,
+        timer_settime = 223,
+        timer_gettime = 224,
+        timer_getoverrun = 225,
+        timer_delete = 226,
+        clock_settime = 227,
+        clock_gettime = 228,
+        clock_getres = 229,
+        clock_nanosleep = 230,
+        exit_group = 231,
+        epoll_wait = 232,
+        epoll_ctl = 233,
+        tgkill = 234,
+        utimes = 235,
+        vserver = 236,
+        mbind = 237,
+        set_mempolicy = 238,
+        get_mempolicy = 239,
+        mq_open = 240,
+        mq_unlink = 241,
+        mq_timedsend = 242,
+        mq_timedreceive = 243,
+        mq_notify = 244,
+        mq_getsetattr = 245,
+        kexec_load = 246,
+        waitid = 247,
+        add_key = 248,
+        request_key = 249,
+        keyctl = 250,
+        ioprio_set = 251,
+        ioprio_get = 252,
+        inotify_init = 253,
+        inotify_add_watch = 254,
+        inotify_rm_watch = 255,
+        migrate_pages = 256,
+        openat = 257,
+        mkdirat = 258,
+        mknodat = 259,
+        fchownat = 260,
+        futimesat = 261,
+        newfstatat = 262,
+        unlinkat = 263,
+        renameat = 264,
+        linkat = 265,
+        symlinkat = 266,
+        readlinkat = 267,
+        fchmodat = 268,
+        faccessat = 269,
+        pselect6 = 270,
+        ppoll = 271,
+        unshare = 272,
+        set_robust_list = 273,
+        get_robust_list = 274,
+        splice = 275,
+        tee = 276,
+        sync_file_range = 277,
+        vmsplice = 278,
+        move_pages = 279,
+        utimensat = 280,
+        epoll_pwait = 281,
+        signalfd = 282,
+        timerfd_create = 283,
+        eventfd = 284,
+        fallocate = 285,
+        timerfd_settime = 286,
+        timerfd_gettime = 287,
+        accept4 = 288,
+        signalfd4 = 289,
+        eventfd2 = 290,
+        epoll_create1 = 291,
+        dup3 = 292,
+        pipe2 = 293,
+        inotify_init1 = 294,
+        preadv = 295,
+        pwritev = 296,
+        rt_tgsigqueueinfo = 297,
+        perf_event_open = 298,
+        recvmmsg = 299,
+        fanotify_init = 300,
+        fanotify_mark = 301,
+        prlimit64 = 302,
+        name_to_handle_at = 303,
+        open_by_handle_at = 304,
+        clock_adjtime = 305,
+        syncfs = 306,
+        sendmmsg = 307,
+        setns = 308,
+        getcpu = 309,
+        process_vm_readv = 310,
+        process_vm_writev = 311,
+        kcmp = 312,
+        finit_module = 313,
+        sched_setattr = 314,
+        sched_getattr = 315,
+        renameat2 = 316,
+        seccomp = 317,
+        getrandom = 318,
+        memfd_create = 319,
+        kexec_file_load = 320,
+        bpf = 321,
+        execveat = 322,
+        userfaultfd = 323,
+        membarrier = 324,
+        mlock2 = 325,
+        copy_file_range = 326,
+        preadv2 = 327,
+        pwritev2 = 328,
+        pkey_mprotect = 329,
+        pkey_alloc = 330,
+        pkey_free = 331,
+        statx = 332,
+    }
+}
+else version(X86)
+{
+    // https://github.com/torvalds/linux/blob/master/arch/x86/entry/syscalls/syscall_32.tbl
+    // https://github.com/torvalds/linux/blob/v4.14/arch/sh/include/uapi/asm/unistd_32.h
+    enum SYS : c_long
+    {
+        restart_syscall = 0,
+        exit = 1,
+        fork = 2,
+        read = 3,
+        write = 4,
+        open = 5,
+        close = 6,
+        waitpid = 7,
+        creat = 8,
+        link = 9,
+        unlink = 10,
+        execve = 11,
+        chdir = 12,
+        time = 13,
+        mknod = 14,
+        chmod = 15,
+        lchown = 16,
+        break_ = 17,
+        oldstat = 18,
+        lseek = 19,
+        getpid = 20,
+        mount = 21,
+        umount = 22,
+        setuid = 23,
+        getuid = 24,
+        stime = 25,
+        ptrace = 26,
+        alarm = 27,
+        oldfstat = 28,
+        pause = 29,
+        utime = 30,
+        stty = 31,
+        gtty = 32,
+        access = 33,
+        nice = 34,
+        ftime = 35,
+        sync = 36,
+        kill = 37,
+        rename = 38,
+        mkdir = 39,
+        rmdir = 40,
+        dup = 41,
+        pipe = 42,
+        times = 43,
+        prof = 44,
+        brk = 45,
+        setgid = 46,
+        getgid = 47,
+        signal = 48,
+        geteuid = 49,
+        getegid = 50,
+        acct = 51,
+        umount2 = 52,
+        lock = 53,
+        ioctl = 54,
+        fcntl = 55,
+        mpx = 56,
+        setpgid = 57,
+        ulimit = 58,
+        oldolduname = 59,
+        umask = 60,
+        chroot = 61,
+        ustat = 62,
+        dup2 = 63,
+        getppid = 64,
+        getpgrp = 65,
+        setsid = 66,
+        sigaction = 67,
+        sgetmask = 68,
+        ssetmask = 69,
+        setreuid = 70,
+        setregid = 71,
+        sigsuspend = 72,
+        sigpending = 73,
+        sethostname = 74,
+        setrlimit = 75,
+        getrlimit = 76,
+        getrusage = 77,
+        gettimeofday = 78,
+        settimeofday = 79,
+        getgroups = 80,
+        setgroups = 81,
+        select = 82,
+        symlink = 83,
+        oldlstat = 84,
+        readlink = 85,
+        uselib = 86,
+        swapon = 87,
+        reboot = 88,
+        readdir = 89,
+        mmap = 90,
+        munmap = 91,
+        truncate = 92,
+        ftruncate = 93,
+        fchmod = 94,
+        fchown = 95,
+        getpriority = 96,
+        setpriority = 97,
+        profil = 98,
+        statfs = 99,
+        fstatfs = 100,
+        ioperm = 101,
+        socketcall = 102,
+        syslog = 103,
+        setitimer = 104,
+        getitimer = 105,
+        stat = 106,
+        lstat = 107,
+        fstat = 108,
+        olduname = 109,
+        iopl = 110,
+        vhangup = 111,
+        idle = 112,
+        vm86old = 113,
+        wait4 = 114,
+        swapoff = 115,
+        sysinfo = 116,
+        ipc = 117,
+        fsync = 118,
+        sigreturn = 119,
+        clone = 120,
+        setdomainname = 121,
+        uname = 122,
+        modify_ldt = 123,
+        adjtimex = 124,
+        mprotect = 125,
+        sigprocmask = 126,
+        create_module = 127,
+        init_module = 128,
+        delete_module = 129,
+        get_kernel_syms = 130,
+        quotactl = 131,
+        getpgid = 132,
+        fchdir = 133,
+        bdflush = 134,
+        sysfs = 135,
+        personality = 136,
+        afs_syscall = 137,
+        setfsuid = 138,
+        setfsgid = 139,
+        _llseek = 140,
+        getdents = 141,
+        _newselect = 142,
+        flock = 143,
+        msync = 144,
+        readv = 145,
+        writev = 146,
+        getsid = 147,
+        fdatasync = 148,
+        _sysctl = 149,
+        mlock = 150,
+        munlock = 151,
+        mlockall = 152,
+        munlockall = 153,
+        sched_setparam = 154,
+        sched_getparam = 155,
+        sched_setscheduler = 156,
+        sched_getscheduler = 157,
+        sched_yield = 158,
+        sched_get_priority_max = 159,
+        sched_get_priority_min = 160,
+        sched_rr_get_interval = 161,
+        nanosleep = 162,
+        mremap = 163,
+        setresuid = 164,
+        getresuid = 165,
+        vm86 = 166,
+        query_module = 167,
+        poll = 168,
+        nfsservctl = 169,
+        setresgid = 170,
+        getresgid = 171,
+        prctl = 172,
+        rt_sigreturn = 173,
+        rt_sigaction = 174,
+        rt_sigprocmask = 175,
+        rt_sigpending = 176,
+        rt_sigtimedwait = 177,
+        rt_sigqueueinfo = 178,
+        rt_sigsuspend = 179,
+        pread64 = 180,
+        pwrite64 = 181,
+        chown = 182,
+        getcwd = 183,
+        capget = 184,
+        capset = 185,
+        sigaltstack = 186,
+        sendfile = 187,
+        getpmsg = 188,
+        putpmsg = 189,
+        vfork = 190,
+        ugetrlimit = 191,
+        mmap2 = 192,
+        truncate64 = 193,
+        ftruncate64 = 194,
+        stat64 = 195,
+        lstat64 = 196,
+        fstat64 = 197,
+        lchown32 = 198,
+        getuid32 = 199,
+        getgid32 = 200,
+        geteuid32 = 201,
+        getegid32 = 202,
+        setreuid32 = 203,
+        setregid32 = 204,
+        getgroups32 = 205,
+        setgroups32 = 206,
+        fchown32 = 207,
+        setresuid32 = 208,
+        getresuid32 = 209,
+        setresgid32 = 210,
+        getresgid32 = 211,
+        chown32 = 212,
+        setuid32 = 213,
+        setgid32 = 214,
+        setfsuid32 = 215,
+        setfsgid32 = 216,
+        pivot_root = 217,
+        mincore = 218,
+        madvise = 219,
+        getdents64 = 220,
+        fcntl64 = 221,
+        gettid = 224,
+        readahead = 225,
+        setxattr = 226,
+        lsetxattr = 227,
+        fsetxattr = 228,
+        getxattr = 229,
+        lgetxattr = 230,
+        fgetxattr = 231,
+        listxattr = 232,
+        llistxattr = 233,
+        flistxattr = 234,
+        removexattr = 235,
+        lremovexattr = 236,
+        fremovexattr = 237,
+        tkill = 238,
+        sendfile64 = 239,
+        futex = 240,
+        sched_setaffinity = 241,
+        sched_getaffinity = 242,
+        set_thread_area = 243,
+        get_thread_area = 244,
+        io_setup = 245,
+        io_destroy = 246,
+        io_getevents = 247,
+        io_submit = 248,
+        io_cancel = 249,
+        fadvise64 = 250,
+        exit_group = 252,
+        lookup_dcookie = 253,
+        epoll_create = 254,
+        epoll_ctl = 255,
+        epoll_wait = 256,
+        remap_file_pages = 257,
+        set_tid_address = 258,
+        timer_create = 259,
+        timer_settime = 260,
+        timer_gettime = 261,
+        timer_getoverrun = 262,
+        timer_delete = 263,
+        clock_settime = 264,
+        clock_gettime = 265,
+        clock_getres = 266,
+        clock_nanosleep = 267,
+        statfs64 = 268,
+        fstatfs64 = 269,
+        tgkill = 270,
+        utimes = 271,
+        fadvise64_64 = 272,
+        vserver = 273,
+        mbind = 274,
+        get_mempolicy = 275,
+        set_mempolicy = 276,
+        mq_open = 277,
+        mq_unlink = 278,
+        mq_timedsend = 279,
+        mq_timedreceive = 280,
+        mq_notify = 281,
+        mq_getsetattr = 282,
+        kexec_load = 283,
+        waitid = 284,
+        add_key = 286,
+        request_key = 287,
+        keyctl = 288,
+        ioprio_set = 289,
+        ioprio_get = 290,
+        inotify_init = 291,
+        inotify_add_watch = 292,
+        inotify_rm_watch = 293,
+        migrate_pages = 294,
+        openat = 295,
+        mkdirat = 296,
+        mknodat = 297,
+        fchownat = 298,
+        futimesat = 299,
+        fstatat64 = 300,
+        unlinkat = 301,
+        renameat = 302,
+        linkat = 303,
+        symlinkat = 304,
+        readlinkat = 305,
+        fchmodat = 306,
+        faccessat = 307,
+        pselect6 = 308,
+        ppoll = 309,
+        unshare = 310,
+        set_robust_list = 311,
+        get_robust_list = 312,
+        splice = 313,
+        sync_file_range = 314,
+        tee = 315,
+        vmsplice = 316,
+        move_pages = 317,
+        getcpu = 318,
+        epoll_pwait = 319,
+        utimensat = 320,
+        signalfd = 321,
+        timerfd_create = 322,
+        eventfd = 323,
+        fallocate = 324,
+        timerfd_settime = 325,
+        timerfd_gettime = 326,
+        signalfd4 = 327,
+        eventfd2 = 328,
+        epoll_create1 = 329,
+        dup3 = 330,
+        pipe2 = 331,
+        inotify_init1 = 332,
+        preadv = 333,
+        pwritev = 334,
+        rt_tgsigqueueinfo = 335,
+        perf_event_open = 336,
+        recvmmsg = 337,
+        fanotify_init = 338,
+        fanotify_mark = 339,
+        prlimit64 = 340,
+        name_to_handle_at = 341,
+        open_by_handle_at = 342,
+        clock_adjtime = 343,
+        syncfs = 344,
+        sendmmsg = 345,
+        setns = 346,
+        process_vm_readv = 347,
+        process_vm_writev = 348,
+        kcmp = 349,
+        finit_module = 350,
+        sched_setattr = 351,
+        sched_getattr = 352,
+        renameat2 = 353,
+        seccomp = 354,
+        getrandom = 355,
+        memfd_create = 356,
+        bpf = 357,
+        execveat = 358,
+        socket = 359,
+        socketpair = 360,
+        bind = 361,
+        connect = 362,
+        listen = 363,
+        accept4 = 364,
+        getsockopt = 365,
+        setsockopt = 366,
+        getsockname = 367,
+        getpeername = 368,
+        sendto = 369,
+        sendmsg = 370,
+        recvfrom = 371,
+        recvmsg = 372,
+        shutdown = 373,
+        userfaultfd = 374,
+        membarrier = 375,
+        mlock2 = 376,
+        copy_file_range = 377,
+        preadv2 = 378,
+        pwritev2 = 379,
+        pkey_mprotect = 380,
+        pkey_alloc = 381,
+        pkey_free = 382,
+        statx = 383,
+        arch_prctl = 384,
+    }
+}
diff --git a/src/core/sys/linux/unistd.d b/src/core/sys/linux/unistd.d
index 66cd2fbd6e..187611f97c 100644
--- a/src/core/sys/linux/unistd.d
+++ b/src/core/sys/linux/unistd.d
@@ -1,6 +1,8 @@
 module core.sys.linux.unistd;
 
 public import core.sys.posix.unistd;
+public import core.sys.linux.syscalls : SYS;
+import core.sys.posix.sys.types : c_long;
 
 version(linux):
 extern(C):
@@ -18,3 +20,17 @@ enum {
 
 /// Prompt for a password without echoing it.
 char* getpass(const(char)* prompt);
+
+/**
+Invoke `system call' number SYSNO, passing it the remaining arguments.
+This is completely system-dependent, and not often useful.
+
+In Unix, `syscall' sets `errno' for all errors and most calls return -1
+for errors; in many systems you cannot pass arguments or get return
+values for all system calls (`pipe', `fork', and `getppid' typically
+among them).
+
+In Mach, all system calls take normal arguments and always return an
+error code (zero for success).
+*/
+c_long syscall (c_long SYS, ...) @nogc nothrow;
diff --git a/win32.mak b/win32.mak
index 57af4e42c7..c35359dc87 100644
--- a/win32.mak
+++ b/win32.mak
@@ -526,6 +526,9 @@ $(IMPDIR)\core\sys\linux\sys\socket.d : src\core\sys\linux\sys\socket.d
 $(IMPDIR)\core\sys\linux\sys\sysinfo.d : src\core\sys\linux\sys\sysinfo.d
 	copy $** $@
 
+$(IMPDIR)\core\sys\linux\sys\syscalls.d: src\core\sys\linux\sys\syscalls.d
+	copy $** $@
+
 $(IMPDIR)\core\sys\linux\sys\xattr.d : src\core\sys\linux\sys\xattr.d
 	copy $** $@
 
diff --git a/win64.mak b/win64.mak
index 2f81879efa..cf92ebfbc5 100644
--- a/win64.mak
+++ b/win64.mak
@@ -486,6 +486,9 @@ $(IMPDIR)\core\sys\linux\link.d : src\core\sys\linux\link.d
 $(IMPDIR)\core\sys\linux\sched.d : src\core\sys\linux\sched.d
 	copy $** $@
 
+$(IMPDIR)\core\sys\linux\syscalls.d: src\core\sys\linux\syscalls.d
+	copy $** $@
+
 $(IMPDIR)\core\sys\linux\termios.d : src\core\sys\linux\termios.d
 	copy $** $@