Merge pull request #6792 from koachan/sparc64-linux

Initial sparc64-linux bringup

5 files changed, 874 insertions, 9 deletions

diff --git a/lib/std/os/bits/linux.zig b/lib/std/os/bits/linux.zig
index 8dbf21fcf2..ce9b4a90d1 100644
--- a/lib/std/os/bits/linux.zig
+++ b/lib/std/os/bits/linux.zig
@@ -19,6 +19,7 @@ pub usingnamespace switch (builtin.arch) {
     .aarch64 => @import("linux/arm64.zig"),
     .arm => @import("linux/arm-eabi.zig"),
     .riscv64 => @import("linux/riscv64.zig"),
+    .sparcv9 => @import("linux/sparc64.zig"),
     .mips, .mipsel => @import("linux/mips.zig"),
     .powerpc64, .powerpc64le => @import("linux/powerpc64.zig"),
     else => struct {},
@@ -30,6 +31,7 @@ pub usingnamespace @import("linux/securebits.zig");
 
 const is_mips = builtin.arch.isMIPS();
 const is_ppc64 = builtin.arch.isPPC64();
+const is_sparc = builtin.arch.isSPARC();
 
 pub const pid_t = i32;
 pub const fd_t = i32;
@@ -182,28 +184,47 @@ pub usingnamespace if (is_mips)
         pub const SA_NOCLDSTOP = 1;
         pub const SA_NOCLDWAIT = 0x10000;
         pub const SA_SIGINFO = 8;
+        pub const SA_RESTART = 0x10000000;
+        pub const SA_RESETHAND = 0x80000000;
+        pub const SA_ONSTACK = 0x08000000;
+        pub const SA_NODEFER = 0x40000000;
+        pub const SA_RESTORER = 0x04000000;
 
         pub const SIG_BLOCK = 1;
         pub const SIG_UNBLOCK = 2;
         pub const SIG_SETMASK = 3;
     }
+else if (is_sparc)
+    struct {
+        pub const SA_NOCLDSTOP = 0x8;
+        pub const SA_NOCLDWAIT = 0x100;
+        pub const SA_SIGINFO = 0x200;
+        pub const SA_RESTART = 0x2;
+        pub const SA_RESETHAND = 0x4;
+        pub const SA_ONSTACK = 0x1;
+        pub const SA_NODEFER = 0x20;
+        pub const SA_RESTORER = 0x04000000;
+
+        pub const SIG_BLOCK = 1;
+        pub const SIG_UNBLOCK = 2;
+        pub const SIG_SETMASK = 4;
+    }
 else
     struct {
         pub const SA_NOCLDSTOP = 1;
         pub const SA_NOCLDWAIT = 2;
         pub const SA_SIGINFO = 4;
+        pub const SA_RESTART = 0x10000000;
+        pub const SA_RESETHAND = 0x80000000;
+        pub const SA_ONSTACK = 0x08000000;
+        pub const SA_NODEFER = 0x40000000;
+        pub const SA_RESTORER = 0x04000000;
 
         pub const SIG_BLOCK = 0;
         pub const SIG_UNBLOCK = 1;
         pub const SIG_SETMASK = 2;
     };
 
-pub const SA_ONSTACK = 0x08000000;
-pub const SA_RESTART = 0x10000000;
-pub const SA_NODEFER = 0x40000000;
-pub const SA_RESETHAND = 0x80000000;
-pub const SA_RESTORER = 0x04000000;
-
 pub const SIGHUP = 1;
 pub const SIGINT = 2;
 pub const SIGQUIT = 3;
diff --git a/lib/std/os/bits/linux/sparc64.zig b/lib/std/os/bits/linux/sparc64.zig
new file mode 100644
index 0000000000..0f2e5b5035
--- /dev/null
+++ b/lib/std/os/bits/linux/sparc64.zig
@@ -0,0 +1,679 @@
+// sparc64-specific declarations that are intended to be imported into the POSIX namespace.
+const std = @import("../../../std.zig");
+const pid_t = linux.pid_t;
+const uid_t = linux.uid_t;
+const clock_t = linux.clock_t;
+const stack_t = linux.stack_t;
+const sigset_t = linux.sigset_t;
+
+const linux = std.os.linux;
+const sockaddr = linux.sockaddr;
+const socklen_t = linux.socklen_t;
+const iovec = linux.iovec;
+const iovec_const = linux.iovec_const;
+
+pub const SYS = extern enum(usize) {
+    restart_syscall = 0,
+    exit = 1,
+    fork = 2,
+    read = 3,
+    write = 4,
+    open = 5,
+    close = 6,
+    wait4 = 7,
+    creat = 8,
+    link = 9,
+    unlink = 10,
+    execv = 11,
+    chdir = 12,
+    chown = 13,
+    mknod = 14,
+    chmod = 15,
+    lchown = 16,
+    brk = 17,
+    perfctr = 18,
+    lseek = 19,
+    getpid = 20,
+    capget = 21,
+    capset = 22,
+    setuid = 23,
+    getuid = 24,
+    vmsplice = 25,
+    ptrace = 26,
+    alarm = 27,
+    sigaltstack = 28,
+    pause = 29,
+    utime = 30,
+    access = 33,
+    nice = 34,
+    sync = 36,
+    kill = 37,
+    stat = 38,
+    sendfile = 39,
+    lstat = 40,
+    dup = 41,
+    pipe = 42,
+    times = 43,
+    umount2 = 45,
+    setgid = 46,
+    getgid = 47,
+    signal = 48,
+    geteuid = 49,
+    getegid = 50,
+    acct = 51,
+    memory_ordering = 52,
+    ioctl = 54,
+    reboot = 55,
+    symlink = 57,
+    readlink = 58,
+    execve = 59,
+    umask = 60,
+    chroot = 61,
+    fstat = 62,
+    fstat64 = 63,
+    getpagesize = 64,
+    msync = 65,
+    vfork = 66,
+    pread64 = 67,
+    pwrite64 = 68,
+    mmap = 71,
+    munmap = 73,
+    mprotect = 74,
+    madvise = 75,
+    vhangup = 76,
+    mincore = 78,
+    getgroups = 79,
+    setgroups = 80,
+    getpgrp = 81,
+    setitimer = 83,
+    swapon = 85,
+    getitimer = 86,
+    sethostname = 88,
+    dup2 = 90,
+    fcntl = 92,
+    select = 93,
+    fsync = 95,
+    setpriority = 96,
+    socket = 97,
+    connect = 98,
+    accept = 99,
+    getpriority = 100,
+    rt_sigreturn = 101,
+    rt_sigaction = 102,
+    rt_sigprocmask = 103,
+    rt_sigpending = 104,
+    rt_sigtimedwait = 105,
+    rt_sigqueueinfo = 106,
+    rt_sigsuspend = 107,
+    setresuid = 108,
+    getresuid = 109,
+    setresgid = 110,
+    getresgid = 111,
+    recvmsg = 113,
+    sendmsg = 114,
+    gettimeofday = 116,
+    getrusage = 117,
+    getsockopt = 118,
+    getcwd = 119,
+    readv = 120,
+    writev = 121,
+    settimeofday = 122,
+    fchown = 123,
+    fchmod = 124,
+    recvfrom = 125,
+    setreuid = 126,
+    setregid = 127,
+    rename = 128,
+    truncate = 129,
+    ftruncate = 130,
+    flock = 131,
+    lstat64 = 132,
+    sendto = 133,
+    shutdown = 134,
+    socketpair = 135,
+    mkdir = 136,
+    rmdir = 137,
+    utimes = 138,
+    stat64 = 139,
+    sendfile64 = 140,
+    getpeername = 141,
+    futex = 142,
+    gettid = 143,
+    getrlimit = 144,
+    setrlimit = 145,
+    pivot_root = 146,
+    prctl = 147,
+    pciconfig_read = 148,
+    pciconfig_write = 149,
+    getsockname = 150,
+    inotify_init = 151,
+    inotify_add_watch = 152,
+    poll = 153,
+    getdents64 = 154,
+    inotify_rm_watch = 156,
+    statfs = 157,
+    fstatfs = 158,
+    umount = 159,
+    sched_set_affinity = 160,
+    sched_get_affinity = 161,
+    getdomainname = 162,
+    setdomainname = 163,
+    utrap_install = 164,
+    quotactl = 165,
+    set_tid_address = 166,
+    mount = 167,
+    ustat = 168,
+    setxattr = 169,
+    lsetxattr = 170,
+    fsetxattr = 171,
+    getxattr = 172,
+    lgetxattr = 173,
+    getdents = 174,
+    setsid = 175,
+    fchdir = 176,
+    fgetxattr = 177,
+    listxattr = 178,
+    llistxattr = 179,
+    flistxattr = 180,
+    removexattr = 181,
+    lremovexattr = 182,
+    sigpending = 183,
+    query_module = 184,
+    setpgid = 185,
+    fremovexattr = 186,
+    tkill = 187,
+    exit_group = 188,
+    uname = 189,
+    init_module = 190,
+    personality = 191,
+    remap_file_pages = 192,
+    epoll_create = 193,
+    epoll_ctl = 194,
+    epoll_wait = 195,
+    ioprio_set = 196,
+    getppid = 197,
+    sigaction = 198,
+    sgetmask = 199,
+    ssetmask = 200,
+    sigsuspend = 201,
+    oldlstat = 202,
+    uselib = 203,
+    readdir = 204,
+    readahead = 205,
+    socketcall = 206,
+    syslog = 207,
+    lookup_dcookie = 208,
+    fadvise64 = 209,
+    fadvise64_64 = 210,
+    tgkill = 211,
+    waitpid = 212,
+    swapoff = 213,
+    sysinfo = 214,
+    ipc = 215,
+    sigreturn = 216,
+    clone = 217,
+    ioprio_get = 218,
+    adjtimex = 219,
+    sigprocmask = 220,
+    create_module = 221,
+    delete_module = 222,
+    get_kernel_syms = 223,
+    getpgid = 224,
+    bdflush = 225,
+    sysfs = 226,
+    afs_syscall = 227,
+    setfsuid = 228,
+    setfsgid = 229,
+    _newselect = 230,
+    splice = 232,
+    stime = 233,
+    statfs64 = 234,
+    fstatfs64 = 235,
+    _llseek = 236,
+    mlock = 237,
+    munlock = 238,
+    mlockall = 239,
+    munlockall = 240,
+    sched_setparam = 241,
+    sched_getparam = 242,
+    sched_setscheduler = 243,
+    sched_getscheduler = 244,
+    sched_yield = 245,
+    sched_get_priority_max = 246,
+    sched_get_priority_min = 247,
+    sched_rr_get_interval = 248,
+    nanosleep = 249,
+    mremap = 250,
+    _sysctl = 251,
+    getsid = 252,
+    fdatasync = 253,
+    nfsservctl = 254,
+    sync_file_range = 255,
+    clock_settime = 256,
+    clock_gettime = 257,
+    clock_getres = 258,
+    clock_nanosleep = 259,
+    sched_getaffinity = 260,
+    sched_setaffinity = 261,
+    timer_settime = 262,
+    timer_gettime = 263,
+    timer_getoverrun = 264,
+    timer_delete = 265,
+    timer_create = 266,
+    vserver = 267,
+    io_setup = 268,
+    io_destroy = 269,
+    io_submit = 270,
+    io_cancel = 271,
+    io_getevents = 272,
+    mq_open = 273,
+    mq_unlink = 274,
+    mq_timedsend = 275,
+    mq_timedreceive = 276,
+    mq_notify = 277,
+    mq_getsetattr = 278,
+    waitid = 279,
+    tee = 280,
+    add_key = 281,
+    request_key = 282,
+    keyctl = 283,
+    openat = 284,
+    mkdirat = 285,
+    mknodat = 286,
+    fchownat = 287,
+    futimesat = 288,
+    fstatat64 = 289,
+    unlinkat = 290,
+    renameat = 291,
+    linkat = 292,
+    symlinkat = 293,
+    readlinkat = 294,
+    fchmodat = 295,
+    faccessat = 296,
+    pselect6 = 297,
+    ppoll = 298,
+    unshare = 299,
+    set_robust_list = 300,
+    get_robust_list = 301,
+    migrate_pages = 302,
+    mbind = 303,
+    get_mempolicy = 304,
+    set_mempolicy = 305,
+    kexec_load = 306,
+    move_pages = 307,
+    getcpu = 308,
+    epoll_pwait = 309,
+    utimensat = 310,
+    signalfd = 311,
+    timerfd_create = 312,
+    eventfd = 313,
+    fallocate = 314,
+    timerfd_settime = 315,
+    timerfd_gettime = 316,
+    signalfd4 = 317,
+    eventfd2 = 318,
+    epoll_create1 = 319,
+    dup3 = 320,
+    pipe2 = 321,
+    inotify_init1 = 322,
+    accept4 = 323,
+    preadv = 324,
+    pwritev = 325,
+    rt_tgsigqueueinfo = 326,
+    perf_event_open = 327,
+    recvmmsg = 328,
+    fanotify_init = 329,
+    fanotify_mark = 330,
+    prlimit64 = 331,
+    name_to_handle_at = 332,
+    open_by_handle_at = 333,
+    clock_adjtime = 334,
+    syncfs = 335,
+    sendmmsg = 336,
+    setns = 337,
+    process_vm_readv = 338,
+    process_vm_writev = 339,
+    kern_features = 340,
+    kcmp = 341,
+    finit_module = 342,
+    sched_setattr = 343,
+    sched_getattr = 344,
+    renameat2 = 345,
+    seccomp = 346,
+    getrandom = 347,
+    memfd_create = 348,
+    bpf = 349,
+    execveat = 350,
+    membarrier = 351,
+    userfaultfd = 352,
+    bind = 353,
+    listen = 354,
+    setsockopt = 355,
+    mlock2 = 356,
+    copy_file_range = 357,
+    preadv2 = 358,
+    pwritev2 = 359,
+    statx = 360,
+    io_pgetevents = 361,
+    pkey_mprotect = 362,
+    pkey_alloc = 363,
+    pkey_free = 364,
+    rseq = 365,
+    semtimedop = 392,
+    semget = 393,
+    semctl = 394,
+    shmget = 395,
+    shmctl = 396,
+    shmat = 397,
+    shmdt = 398,
+    msgget = 399,
+    msgsnd = 400,
+    msgrcv = 401,
+    msgctl = 402,
+    pidfd_send_signal = 424,
+    io_uring_setup = 425,
+    io_uring_enter = 426,
+    io_uring_register = 427,
+    open_tree = 428,
+    move_mount = 429,
+    fsopen = 430,
+    fsconfig = 431,
+    fsmount = 432,
+    fspick = 433,
+    pidfd_open = 434,
+    openat2 = 437,
+    pidfd_getfd = 438,
+
+    _,
+};
+
+pub const O_CREAT = 0x200;
+pub const O_EXCL = 0x800;
+pub const O_NOCTTY = 0x8000;
+pub const O_TRUNC = 0x400;
+pub const O_APPEND = 0x8;
+pub const O_NONBLOCK = 0x4000;
+pub const O_SYNC = 0x802000;
+pub const O_DSYNC = 0x2000;
+pub const O_RSYNC = O_SYNC;
+pub const O_DIRECTORY = 0x10000;
+pub const O_NOFOLLOW = 0x20000;
+pub const O_CLOEXEC = 0x400000;
+
+pub const O_ASYNC = 0x40;
+pub const O_DIRECT = 0x100000;
+pub const O_LARGEFILE = 0;
+pub const O_NOATIME = 0x200000;
+pub const O_PATH = 0x1000000;
+pub const O_TMPFILE = 0x2010000;
+pub const O_NDELAY = O_NONBLOCK | 0x4;
+
+pub const F_DUPFD = 0;
+pub const F_GETFD = 1;
+pub const F_SETFD = 2;
+pub const F_GETFL = 3;
+pub const F_SETFL = 4;
+
+pub const F_SETOWN = 5;
+pub const F_GETOWN = 6;
+pub const F_GETLK = 7;
+pub const F_SETLK = 8;
+pub const F_SETLKW = 9;
+
+pub const F_RDLCK = 1;
+pub const F_WRLCK = 2;
+pub const F_UNLCK = 3;
+
+pub const F_SETOWN_EX = 15;
+pub const F_GETOWN_EX = 16;
+
+pub const F_GETOWNER_UIDS = 17;
+
+pub const LOCK_SH = 1;
+pub const LOCK_EX = 2;
+pub const LOCK_NB = 4;
+pub const LOCK_UN = 8;
+
+/// stack-like segment
+pub const MAP_GROWSDOWN = 0x0200;
+
+/// ETXTBSY
+pub const MAP_DENYWRITE = 0x0800;
+
+/// mark it as an executable
+pub const MAP_EXECUTABLE = 0x1000;
+
+/// pages are locked
+pub const MAP_LOCKED = 0x0100;
+
+/// don't check for reservations
+pub const MAP_NORESERVE = 0x0040;
+
+pub const VDSO_CGT_SYM = "__vdso_clock_gettime";
+pub const VDSO_CGT_VER = "LINUX_2.6";
+
+pub const Flock = extern struct {
+    l_type: i16,
+    l_whence: i16,
+    l_start: off_t,
+    l_len: off_t,
+    l_pid: pid_t,
+};
+
+pub const msghdr = extern struct {
+    msg_name: ?*sockaddr,
+    msg_namelen: socklen_t,
+    msg_iov: [*]iovec,
+    msg_iovlen: u64,
+    msg_control: ?*c_void,
+    msg_controllen: u64,
+    msg_flags: i32,
+};
+
+pub const msghdr_const = extern struct {
+    msg_name: ?*const sockaddr,
+    msg_namelen: socklen_t,
+    msg_iov: [*]iovec_const,
+    msg_iovlen: u64,
+    msg_control: ?*c_void,
+    msg_controllen: u64,
+    msg_flags: i32,
+};
+
+pub const off_t = i64;
+pub const ino_t = u64;
+pub const mode_t = u32;
+
+/// atime, mtime, and ctime have functions to return `timespec`,
+/// because although this is a POSIX API, the layout and names of
+/// the structs are inconsistent across operating systems, and
+/// in C, macros are used to hide the differences. Here we use
+/// methods to accomplish this.
+pub const libc_stat = extern struct {
+    dev: u64,
+    ino: ino_t,
+    mode: u32,
+    nlink: usize,
+
+    uid: u32,
+    gid: u32,
+    rdev: u64,
+    __pad0: u32,
+
+    size: off_t,
+    blksize: isize,
+    blocks: i64,
+
+    atim: timespec,
+    mtim: timespec,
+    ctim: timespec,
+    __unused: [2]isize,
+
+    pub fn atime(self: libc_stat) timespec {
+        return self.atim;
+    }
+
+    pub fn mtime(self: libc_stat) timespec {
+        return self.mtim;
+    }
+
+    pub fn ctime(self: libc_stat) timespec {
+        return self.ctim;
+    }
+};
+
+pub const kernel_stat = extern struct {
+    dev: u32,
+    ino: ino_t,
+    mode: mode_t,
+    nlink: i16,
+
+    uid: u32,
+    gid: u32,
+    rdev: u32,
+
+    size: off_t,
+    atim: isize,
+    mtim: isize,
+    ctim: isize,
+
+    blksize: off_t,
+    blocks: off_t,
+
+    __unused4: [2]isize,
+
+    // Hack to make the stdlib not complain about atime
+    // and friends not being a method.
+    // TODO what should tv_nsec be filled with?
+    pub fn atime(self: kernel_stat) timespec {
+        return timespec{.tv_sec=self.atim, .tv_nsec=0};
+    }
+
+    pub fn mtime(self: kernel_stat) timespec {
+        return timespec{.tv_sec=self.mtim, .tv_nsec=0};
+    }
+
+    pub fn ctime(self: kernel_stat) timespec {
+        return timespec{.tv_sec=self.ctim, .tv_nsec=0};
+    }
+};
+
+/// Renamed to Stat to not conflict with the stat function.
+pub const Stat = if (std.builtin.link_libc) libc_stat else kernel_stat;
+
+pub const timespec = extern struct {
+    tv_sec: isize,
+    tv_nsec: isize,
+};
+
+pub const timeval = extern struct {
+    tv_sec: isize,
+    tv_usec: isize,
+};
+
+pub const timezone = extern struct {
+    tz_minuteswest: i32,
+    tz_dsttime: i32,
+};
+
+// TODO I'm not sure if the code below is correct, need someone with more
+// knowledge about sparc64 linux internals to look into.
+
+pub const Elf_Symndx = u32;
+
+pub const fpstate = extern struct {
+    regs: [32]u64,
+    fsr: u64,
+    gsr: u64,
+    fprs: u64,
+};
+
+pub const __fpq = extern struct {
+    fpq_addr: *u32,
+    fpq_instr: u32,
+};
+
+pub const __fq = extern struct {
+    FQu: extern union {
+        whole: f64,
+        fpq: __fpq,
+    },
+};
+
+pub const fpregset_t = extern struct {
+    fpu_fr: extern union {
+        fpu_regs: [32]u32,
+        fpu_dregs: [32]f64,
+        fpu_qregs: [16]c_longdouble,
+    },
+    fpu_q: *__fq,
+    fpu_fsr: u64,
+    fpu_qcnt: u8,
+    fpu_q_entrysize: u8,
+    fpu_en: u8,
+};
+
+pub const siginfo_fpu_t = extern struct {
+    float_regs: [64]u32,
+    fsr: u64,
+    gsr: u64,
+    fprs: u64,
+};
+
+pub const sigcontext = extern struct {
+    info: [128]i8,
+    regs: extern struct {
+        u_regs: [16]u64,
+        tstate: u64,
+        tpc: u64,
+        tnpc: u64,
+        y: u64,
+        fprs: u64,
+    },
+    fpu_save: *siginfo_fpu_t,
+    stack: extern struct {
+        sp: usize,
+        flags: i32,
+        size: u64,
+    },
+    mask: u64,
+};
+
+pub const greg_t = u64;
+pub const gregset_t = [19]greg_t;
+
+pub const fq = extern struct {
+    addr: *u64,
+    insn: u32,
+};
+
+pub const fpu_t = extern struct {
+    fregs: extern union {
+        sregs: [32]u32,
+        dregs: [32]u64,
+        qregs: [16]c_longdouble,
+    },
+    fsr: u64,
+    fprs: u64,
+    gsr: u64,
+    fq: *fq,
+    qcnt: u8,
+    qentsz: u8,
+    enab: u8,
+};
+
+pub const mcontext_t = extern struct {
+    gregs: gregset_t,
+    fp: greg_t,
+    @"i7": greg_t,
+    fpregs: fpu_t,
+};
+
+pub const ucontext_t = extern struct {
+    link: *ucontext_t,
+    flags: u64,
+    sigmask: u64,
+    mcontext: mcontext_t,
+    stack: stack_t,
+    sigmask: sigset_t,
+};
diff --git a/lib/std/os/linux.zig b/lib/std/os/linux.zig
index a126231db1..96e8a5edf4 100644
--- a/lib/std/os/linux.zig
+++ b/lib/std/os/linux.zig
@@ -24,6 +24,7 @@ pub usingnamespace switch (builtin.arch) {
     .aarch64 => @import("linux/arm64.zig"),
     .arm => @import("linux/arm-eabi.zig"),
     .riscv64 => @import("linux/riscv64.zig"),
+    .sparcv9 => @import("linux/sparc64.zig"),
     .mips, .mipsel => @import("linux/mips.zig"),
     .powerpc64, .powerpc64le => @import("linux/powerpc64.zig"),
     else => struct {},
@@ -381,7 +382,7 @@ pub fn faccessat(dirfd: i32, path: [*:0]const u8, mode: u32, flags: u32) usize {
 }
 
 pub fn pipe(fd: *[2]i32) usize {
-    if (comptime builtin.arch.isMIPS()) {
+    if (comptime (builtin.arch.isMIPS() or builtin.arch.isSPARC())) {
         return syscall_pipe(fd);
     } else if (@hasField(SYS, "pipe")) {
         return syscall1(.pipe, @ptrToInt(fd));
@@ -818,7 +819,11 @@ pub fn sigaction(sig: u6, noalias act: *const Sigaction, noalias oact: ?*Sigacti
     var ksa_old: k_sigaction = undefined;
     const ksa_mask_size = @sizeOf(@TypeOf(ksa_old.mask));
     @memcpy(@ptrCast([*]u8, &ksa.mask), @ptrCast([*]const u8, &act.mask), ksa_mask_size);
-    const result = syscall4(.rt_sigaction, sig, @ptrToInt(&ksa), @ptrToInt(&ksa_old), ksa_mask_size);
+    const result = switch (builtin.arch) {
+        // The sparc version of rt_sigaction needs the restorer function to be passed as an argument too.
+        .sparc, .sparcv9 => syscall5(.rt_sigaction, sig, @ptrToInt(&ksa), @ptrToInt(&ksa_old), @ptrToInt(ksa.restorer), ksa_mask_size),
+        else => syscall4(.rt_sigaction, sig, @ptrToInt(&ksa), @ptrToInt(&ksa_old), ksa_mask_size),
+    };
     const err = getErrno(result);
     if (err != 0) {
         return result;
diff --git a/lib/std/os/linux/sparc64.zig b/lib/std/os/linux/sparc64.zig
new file mode 100644
index 0000000000..c3c95424a0
--- /dev/null
+++ b/lib/std/os/linux/sparc64.zig
@@ -0,0 +1,153 @@
+usingnamespace @import("../bits.zig");
+
+pub fn syscall_pipe(fd: *[2]i32) usize {
+    return asm volatile (
+        \\ mov %%o0, %%o2
+        \\ t 0x6d
+        \\ bcc,pt %%xcc, 1f
+        \\ nop
+        \\ ba 2f
+        \\ neg %%o0
+        \\ 1:
+        \\ st %%o0, [%%o2]
+        \\ st %%o1, [%%o2 + 4]
+        \\ clr %%o0
+        \\ 2:
+        : [ret] "={o0}" (-> usize)
+        : [number] "{$2}" (@enumToInt(SYS.pipe))
+        : "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
+    );
+}
+
+pub fn syscall0(number: SYS) usize {
+    return asm volatile (
+        \\ t 0x6d
+        \\ bcc,pt %%xcc, 1f
+        \\ nop
+        \\ neg %%o0
+        \\ 1:
+        : [ret] "={o0}" (-> usize)
+        : [number] "{g1}" (@enumToInt(number))
+        : "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
+    );
+}
+
+pub fn syscall1(number: SYS, arg1: usize) usize {
+    return asm volatile (
+        \\ t 0x6d
+        \\ bcc,pt %%xcc, 1f
+        \\ nop
+        \\ neg %%o0
+        \\ 1:
+        : [ret] "={o0}" (-> usize)
+        : [number] "{g1}" (@enumToInt(number)),
+          [arg1] "{o0}" (arg1)
+        : "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
+    );
+}
+
+pub fn syscall2(number: SYS, arg1: usize, arg2: usize) usize {
+    return asm volatile (
+        \\ t 0x6d
+        \\ bcc,pt %%xcc, 1f
+        \\ nop
+        \\ neg %%o0
+        \\ 1:
+        : [ret] "={o0}" (-> usize)
+        : [number] "{g1}" (@enumToInt(number)),
+          [arg1] "{o0}" (arg1),
+          [arg2] "{o1}" (arg2)
+        : "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
+    );
+}
+
+pub fn syscall3(number: SYS, arg1: usize, arg2: usize, arg3: usize) usize {
+    return asm volatile (
+        \\ t 0x6d
+        \\ bcc,pt %%xcc, 1f
+        \\ nop
+        \\ neg %%o0
+        \\ 1:
+        : [ret] "={o0}" (-> usize)
+        : [number] "{g1}" (@enumToInt(number)),
+          [arg1] "{o0}" (arg1),
+          [arg2] "{o1}" (arg2),
+          [arg3] "{o2}" (arg3)
+        : "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
+    );
+}
+
+pub fn syscall4(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize) usize {
+    return asm volatile (
+        \\ t 0x6d
+        \\ bcc,pt %%xcc, 1f
+        \\ nop
+        \\ neg %%o0
+        \\ 1:
+        : [ret] "={o0}" (-> usize)
+        : [number] "{g1}" (@enumToInt(number)),
+          [arg1] "{o0}" (arg1),
+          [arg2] "{o1}" (arg2),
+          [arg3] "{o2}" (arg3),
+          [arg4] "{o3}" (arg4)
+        : "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
+    );
+}
+
+pub fn syscall5(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize, arg5: usize) usize {
+    return asm volatile (
+        \\ t 0x6d
+        \\ bcc,pt %%xcc, 1f
+        \\ nop
+        \\ neg %%o0
+        \\ 1:
+        : [ret] "={o0}" (-> usize)
+        : [number] "{g1}" (@enumToInt(number)),
+          [arg1] "{o0}" (arg1),
+          [arg2] "{o1}" (arg2),
+          [arg3] "{o2}" (arg3),
+          [arg4] "{o3}" (arg4),
+          [arg5] "{o4}" (arg5),
+        : "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
+    );
+}
+
+pub fn syscall6(
+    number: SYS,
+    arg1: usize,
+    arg2: usize,
+    arg3: usize,
+    arg4: usize,
+    arg5: usize,
+    arg6: usize,
+) usize {
+    return asm volatile (
+        \\ t 0x6d
+        \\ bcc,pt %%xcc, 1f
+        \\ nop
+        \\ neg %%o0
+        \\ 1:
+        : [ret] "={o0}" (-> usize)
+        : [number] "{g1}" (@enumToInt(number)),
+          [arg1] "{o0}" (arg1),
+          [arg2] "{o1}" (arg2),
+          [arg3] "{o2}" (arg3),
+          [arg4] "{o3}" (arg4),
+          [arg5] "{o4}" (arg5),
+          [arg6] "{o5}" (arg6),
+        : "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
+    );
+}
+
+/// This matches the libc clone function.
+pub extern fn clone(func: fn (arg: usize) callconv(.C) u8, stack: usize, flags: usize, arg: usize, ptid: *i32, tls: usize, ctid: *i32) usize;
+
+pub const restore = restore_rt;
+
+pub fn restore_rt() callconv(.Naked) void {
+    return asm volatile ("t 0x6d"
+        :
+        : [number] "{g1}" (@enumToInt(SYS.rt_sigreturn))
+        : "memory", "xcc", "o0", "o1", "o2", "o3", "o4", "o5", "o7"
+    );
+}
diff --git a/lib/std/os/linux/tls.zig b/lib/std/os/linux/tls.zig
index 69e7816f13..f6c339bc2c 100644
--- a/lib/std/os/linux/tls.zig
+++ b/lib/std/os/linux/tls.zig
@@ -54,7 +54,7 @@ const TLSVariant = enum {
 
 const tls_variant = switch (builtin.arch) {
     .arm, .armeb, .aarch64, .aarch64_be, .riscv32, .riscv64, .mips, .mipsel, .powerpc, .powerpc64, .powerpc64le => TLSVariant.VariantI,
-    .x86_64, .i386 => TLSVariant.VariantII,
+    .x86_64, .i386, .sparcv9 => TLSVariant.VariantII,
     else => @compileError("undefined tls_variant for this architecture"),
 };
 
@@ -172,6 +172,13 @@ pub fn setThreadPointer(addr: usize) void {
                 : [addr] "r" (addr)
             );
         },
+        .sparcv9 => {
+            asm volatile (
+                \\ mov %[addr], %%g7
+                :
+                : [addr] "r" (addr)
+            );
+        },
         else => @compileError("Unsupported architecture"),
     }
 }