diff --git a/lib/std/Thread.zig b/lib/std/Thread.zig
index 338d17a487a1526c7cac741f92c8628735b79736..caa22ea4cb4548363d40007e4e2b58a4e829cec8 100644
--- a/lib/std/Thread.zig
+++ b/lib/std/Thread.zig
@@ -1217,8 +1217,8 @@ const LinuxThreadImpl = struct {
                     \\ ldi $16, 0
                     \\ callsys
                     :
-                    : [ptr] "{r16}" (@intFromPtr(self.mapped.ptr)),
-                      [len] "{r17}" (self.mapped.len),
+                    : [ptr] "{$16}" (@intFromPtr(self.mapped.ptr)),
+                      [len] "{$17}" (self.mapped.len),
                 ),
                 .hexagon => asm volatile (
                     \\  r6 = #215 // SYS_munmap
diff --git a/lib/std/debug/Dwarf.zig b/lib/std/debug/Dwarf.zig
index 126b55d5d87be33eab8212dc289616186fbe78ba..28d83d463bd9eef5b0edf815ff132b1c24d35c92 100644
--- a/lib/std/debug/Dwarf.zig
+++ b/lib/std/debug/Dwarf.zig
@@ -1436,6 +1436,7 @@ pub fn compactUnwindToDwarfRegNumber(unwind_reg_number: u3) !u16 {
 pub fn ipRegNum(arch: std.Target.Cpu.Arch) ?u16 {
     return switch (arch) {
         .aarch64, .aarch64_be => 32,
+        .alpha => 64,
         .arc, .arceb => 160,
         .arm, .armeb, .thumb, .thumbeb => 15,
         .csky => 64,
@@ -1460,6 +1461,7 @@ pub fn ipRegNum(arch: std.Target.Cpu.Arch) ?u16 {
 pub fn fpRegNum(arch: std.Target.Cpu.Arch) u16 {
     return switch (arch) {
         .aarch64, .aarch64_be => 29,
+        .alpha => 15,
         .arc, .arceb => 27,
         .arm, .armeb, .thumb, .thumbeb => 11,
         .csky => 14,
@@ -1484,6 +1486,7 @@ pub fn fpRegNum(arch: std.Target.Cpu.Arch) u16 {
 pub fn spRegNum(arch: std.Target.Cpu.Arch) u16 {
     return switch (arch) {
         .aarch64, .aarch64_be => 31,
+        .alpha => 30,
         .arc, .arceb => 28,
         .arm, .armeb, .thumb, .thumbeb => 13,
         .csky => 14,
diff --git a/lib/std/debug/cpu_context.zig b/lib/std/debug/cpu_context.zig
index 2c6355531b91abecf86f1b663220f7c406435b88..4766a124caa8bd2199320bb1f8c2bba8dff4b8a1 100644
--- a/lib/std/debug/cpu_context.zig
+++ b/lib/std/debug/cpu_context.zig
@@ -5,6 +5,7 @@ pub const Native = if (@hasDecl(root, "debug") and @hasDecl(root.debug, "CpuCont
     root.debug.CpuContext
 else switch (native_arch) {
     .aarch64, .aarch64_be => Aarch64,
+    .alpha => Alpha,
     .arc, .arceb => Arc,
     .arm, .armeb, .thumb, .thumbeb => Arm,
     .csky => Csky,
@@ -103,6 +104,10 @@ pub fn fromPosixSignalContext(ctx_ptr: ?*const anyopaque) ?Native {
             .sp = uc.mcontext.sp,
             .pc = uc.mcontext.pc,
         },
+        .alpha => .{
+            .r = uc.mcontext.r,
+            .pc = uc.mcontext.pc,
+        },
         .csky => .{
             .r = uc.mcontext.r0_13 ++
                 [_]u32{ uc.mcontext.r14, uc.mcontext.r15 } ++
@@ -293,6 +298,75 @@ const Aarch64 = extern struct {
     }
 };
 
+const Alpha = extern struct {
+    /// The numbered general-purpose registers R0 - R31.
+    r: [32]u64,
+    pc: u64,
+
+    pub inline fn current() Alpha {
+        var ctx: Alpha = undefined;
+        asm volatile (
+            \\ stq $0 , 0x000($0)
+            \\ stq $1 , 0x008($0)
+            \\ stq $2 , 0x010($0)
+            \\ stq $3 , 0x018($0)
+            \\ stq $4 , 0x020($0)
+            \\ stq $5 , 0x028($0)
+            \\ stq $6 , 0x030($0)
+            \\ stq $7 , 0x038($0)
+            \\ stq $8 , 0x040($0)
+            \\ stq $9 , 0x048($0)
+            \\ stq $10, 0x050($0)
+            \\ stq $11, 0x058($0)
+            \\ stq $12, 0x060($0)
+            \\ stq $13, 0x068($0)
+            \\ stq $14, 0x070($0)
+            \\ stq $15, 0x078($0)
+            \\ stq $16, 0x080($0)
+            \\ stq $17, 0x088($0)
+            \\ stq $18, 0x090($0)
+            \\ stq $19, 0x098($0)
+            \\ stq $20, 0x0a0($0)
+            \\ stq $21, 0x0a8($0)
+            \\ stq $22, 0x0b0($0)
+            \\ stq $23, 0x0b8($0)
+            \\ stq $24, 0x0c0($0)
+            \\ stq $25, 0x0c8($0)
+            \\ stq $26, 0x0d0($0)
+            \\ stq $27, 0x0d8($0)
+            \\ stq $28, 0x0e0($0)
+            \\ stq $29, 0x0e8($0)
+            \\ stq $30, 0x0f0($0)
+            \\
+            \\ br $1, 1f
+            \\1:
+            \\ stq $1, 0x100($0)
+            :
+            : [ctx] "{r0}" (&ctx),
+            : .{ .r1 = true, .memory = true });
+        return ctx;
+    }
+
+    pub fn getFp(ctx: *const Alpha) u64 {
+        return ctx.r[15];
+    }
+    pub fn getPc(ctx: *const Alpha) u64 {
+        return ctx.pc;
+    }
+
+    pub fn dwarfRegisterBytes(ctx: *Aarch64, register_num: u16) DwarfRegisterError![]u8 {
+        switch (register_num) {
+            0...31 => return @ptrCast(&ctx.r[register_num]),
+            64 => return @ptrCast(&ctx.pc),
+
+            32...63 => return error.UnsupportedRegister, // f0 - f31
+            66 => return error.UnsupportedRegister, // uniq
+
+            else => return error.InvalidRegister,
+        }
+    }
+};
+
 /// This is an `extern struct` so that inline assembly in `current` can use field offsets.
 const Arc = extern struct {
     /// The numbered general-purpose registers r0 - r31.
diff --git a/lib/std/os/linux.zig b/lib/std/os/linux.zig
index 0df906340ef804685e6bca37df379b1fddb8ec4d..8f9e7c178307bff79c98356155549c8bbd9ff360 100644
--- a/lib/std/os/linux.zig
+++ b/lib/std/os/linux.zig
@@ -18,6 +18,7 @@ const is_mips = native_arch.isMIPS();
 const is_ppc = native_arch.isPowerPC();
 const is_riscv = native_arch.isRISCV();
 const is_sparc = native_arch.isSPARC();
+const is_hppa = native_arch.isHppa();
 const iovec = std.posix.iovec;
 const iovec_const = std.posix.iovec_const;
 const winsize = std.posix.winsize;
@@ -31,6 +32,7 @@ test {
 
 const arch_bits = switch (native_arch) {
     .aarch64, .aarch64_be => @import("linux/aarch64.zig"),
+    .alpha => @import("linux/alpha.zig"),
     .arc, .arceb => @import("linux/arc.zig"),
     .arm, .armeb, .thumb, .thumbeb => @import("linux/arm.zig"),
     .hexagon => @import("linux/hexagon.zig"),
@@ -124,6 +126,7 @@ pub const syscalls = @import("linux/syscalls.zig");
 pub const SYS = switch (native_arch) {
     .arc, .arceb => syscalls.Arc,
     .aarch64, .aarch64_be => syscalls.Arm64,
+    .alpha => syscalls.Alpha,
     .arm, .armeb, .thumb, .thumbeb => syscalls.Arm,
     .csky => syscalls.CSky,
     .hexagon => syscalls.Hexagon,
@@ -311,6 +314,30 @@ pub const MAP = switch (native_arch) {
         UNINITIALIZED: bool = false,
         _: u5 = 0,
     },
+    .alpha => packed struct(u32) {
+        TYPE: MAP_TYPE,
+        ANONYMOUS: bool = false,
+        _3: u1 = 0,
+        _4: u1 = 0,
+        _5: u1 = 0,
+        FIXED: bool = false,
+        _7: u1 = 0,
+        _8: u1 = 0,
+        _9: u1 = 0,
+        GROWSDOWN: bool = false,
+        DENYWRITE: bool = false,
+        EXECUTABLE: bool = false,
+        LOCKED: bool = false,
+        NORESERVE: bool = false,
+        POPULATE: bool = false,
+        NONBLOCK: bool = false,
+        STACK: bool = false,
+        HUGHETLB: bool = false,
+        FIXED_NOREPLACE: bool = false,
+        _19: u4 = 0,
+        _20: u1 = 0,
+        _: u5 = 0,
+    },
     else => @compileError("missing std.os.linux.MAP constants for this architecture"),
 };
 
@@ -520,6 +547,29 @@ pub const O = switch (native_arch) {
         PATH: bool = false,
         _22: u10 = 0,
     },
+    .alpha => packed struct(u32) {
+        ACCMODE: ACCMODE = .RDONLY,
+        NONBLOCK: bool = false,
+        APPEND: bool = false,
+        _4: u5 = 0,
+        CREAT: bool = false,
+        TRUNC: bool = false,
+        EXCL: bool = false,
+        NOCTTY: bool = false,
+        _9: u1 = 0,
+        DSYNC: bool = false,
+        DIRECTORY: bool = false,
+        NOFOLLOW: bool = false,
+        LARGEFILE: bool = false,
+        _14: u1 = 0,
+        DIRECT: bool = false,
+        NOATIME: bool = false,
+        CLOEXEC: bool = false,
+        SYNC: bool = false,
+        PATH: bool = false,
+        TMPFILE: bool = false,
+        _: u7 = 0,
+    },
     else => @compileError("missing std.os.linux.O constants for this architecture"),
 };
 
@@ -1894,23 +1944,68 @@ pub const F = struct {
     pub const SETLK = GET_SET_LK.SETLK;
     pub const SETLKW = GET_SET_LK.SETLKW;
 
-    const GET_SET_LK = if (@sizeOf(usize) == 64) extern struct {
-        pub const GETLK = if (is_mips) 14 else if (is_sparc) 7 else 5;
-        pub const SETLK = if (is_mips) 6 else if (is_sparc) 8 else 6;
-        pub const SETLKW = if (is_mips) 7 else if (is_sparc) 9 else 7;
-    } else extern struct {
-        // Ensure that 32-bit code uses the large-file variants (GETLK64, etc).
+    pub const SETOWN = GET_SET_OWN.SETOWN;
+    pub const GETOWN = GET_SET_OWN.GETOWN;
 
-        pub const GETLK = if (is_mips) 33 else 12;
-        pub const SETLK = if (is_mips) 34 else 13;
-        pub const SETLKW = if (is_mips) 35 else 14;
+    const GET_SET_LK = switch (native_arch) {
+        .mips, .mipsel => struct {
+            const GETLK = 33;
+            const SETLK = 34;
+            const SETLKW = 35;
+        },
+        .mips64, .mips64el => switch (native_abi) {
+            .gnuabin32, .muslabin32 => struct {
+                const GETLK = 33;
+                const SETLK = 34;
+                const SETLKW = 35;
+            },
+            else => struct {
+                const GETLK = 14;
+                const SETLK = 6;
+                const SETLKW = 7;
+            },
+        },
+        .alpha, .sparc64 => struct {
+            const GETLK = 7;
+            const SETLK = 8;
+            const SETLKW = 9;
+        },
+        .hppa, .hppa64 => struct {
+            const GETLK = 8;
+            const SETLK = 9;
+            const SETLKW = 10;
+        },
+        else => if (@sizeOf(usize) == 8) struct {
+            const GETLK = 5;
+            const SETLK = 6;
+            const SETLKW = 7;
+        } else struct {
+            const GETLK = 12;
+            const SETLK = 13;
+            const SETLKW = 14;
+        },
+    };
+    const GET_SET_OWN = switch (native_arch) {
+        .mips, .mipsel, .mips64, .mips64el => struct {
+            const GETOWN = 23;
+            const SETOWN = 24;
+        },
+        .alpha, .sparc, .sparc64 => struct {
+            const GETOWN = 5;
+            const SETOWN = 6;
+        },
+        .hppa, .hppa64 => struct {
+            const GETOWN = 11;
+            const SETOWN = 12;
+        },
+        else => struct {
+            const GETOWN = 8;
+            const SETOWN = 9;
+        },
     };
 
-    pub const SETOWN = if (is_mips) 24 else if (is_sparc) 6 else 8;
-    pub const GETOWN = if (is_mips) 23 else if (is_sparc) 5 else 9;
-
-    pub const SETSIG = 10;
-    pub const GETSIG = 11;
+    pub const SETSIG = if (is_hppa or native_arch == .alpha) 13 else 11;
+    pub const GETSIG = if (is_hppa or native_arch == .alpha) 14 else 12;
 
     pub const SETOWN_EX = 15;
     pub const GETOWN_EX = 16;
@@ -1923,7 +2018,7 @@ pub const F = struct {
 
     pub const RDLCK = if (is_sparc) 1 else 0;
     pub const WRLCK = if (is_sparc) 2 else 1;
-    pub const UNLCK = if (is_sparc) 3 else 2;
+    pub const UNLCK = if (is_sparc) 3 else if (native_arch == .alpha) 8 else 2;
 
     pub const LINUX_SPECIFIC_BASE = 1024;
 
@@ -3388,6 +3483,294 @@ pub const E = switch (native_arch) {
         HWPOISON = 135,
         _,
     },
+    .alpha => enum(u16) {
+        /// No error occurred.
+        SUCCESS = 0,
+
+        /// Operation not permitted
+        PERM = 1,
+        /// No such file or directory
+        NOENT = 2,
+        /// No such process
+        SRCH = 3,
+        /// Interrupted system call
+        INTR = 4,
+        /// I/O error
+        IO = 5,
+        /// No such device or address
+        NXIO = 6,
+        /// Argument list too long
+        @"2BIG" = 7,
+        /// Exec format error
+        NOEXEC = 8,
+        /// Bad file number
+        BADF = 9,
+        /// No child processes
+        CHILD = 10,
+        /// Out of memory
+        NOMEM = 12,
+        /// Permission denied
+        ACCES = 13,
+        /// Bad address
+        FAULT = 14,
+        /// Block device required
+        NOTBLK = 15,
+        /// Device or resource busy
+        BUSY = 16,
+        /// File exists
+        EXIST = 17,
+        /// Cross-device link
+        XDEV = 18,
+        /// No such device
+        NODEV = 19,
+        /// Not a directory
+        NOTDIR = 20,
+        /// Is a directory
+        ISDIR = 21,
+        /// Invalid argument
+        INVAL = 22,
+        /// File table overflow
+        NFILE = 23,
+        /// Too many open files
+        MFILE = 24,
+        /// Not a typewriter
+        NOTTY = 25,
+        /// Text file busy
+        TXTBSY = 26,
+        /// File too large
+        FBIG = 27,
+        /// No space left on device
+        NOSPC = 28,
+        /// Illegal seek
+        SPIPE = 29,
+        /// Read-only file system
+        ROFS = 30,
+        /// Too many links
+        MLINK = 31,
+        /// Broken pipe
+        PIPE = 32,
+        /// Math argument out of domain of func
+        DOM = 33,
+        /// Math result not representable
+        RANGE = 34,
+
+        /// Resource deadlock would occur
+        DEADLK = 11,
+
+        /// Try again.
+        /// Also used for WOULDBLOCK.
+        AGAIN = 35,
+        /// Operation now in progress
+        INPROGRESS = 36,
+        /// Operation already in progress
+        ALREADY = 37,
+        /// Socket operation on non-socket
+        NOTSOCK = 38,
+        /// Destination address required
+        DESTADDRREQ = 39,
+        /// Message too long
+        MSGSIZE = 40,
+        /// Protocol wrong type for socket
+        PROTOTYPE = 41,
+        /// Protocol not available
+        NOPROTOOPT = 42,
+        /// Protocol not supported
+        PROTONOSUPPORT = 43,
+        /// Socket type not supported
+        SOCKTNOSUPPORT = 44,
+        /// Operation not supported on transport endpoint
+        OPNOTSUPP = 45,
+        /// Protocol family not supported
+        PFNOSUPPORT = 46,
+        /// Address family not supported by protocol
+        AFNOSUPPORT = 47,
+        /// Address already in use
+        ADDRINUSE = 48,
+        /// Cannot assign requested address
+        ADDRNOTAVAIL = 49,
+        /// Network is down
+        NETDOWN = 50,
+        /// Network is unreachable
+        NETUNREACH = 51,
+        /// Network dropped connection because of reset
+        NETRESET = 52,
+        /// Software caused connection abort
+        CONNABORTED = 53,
+        /// Connection reset by peer
+        CONNRESET = 54,
+        /// No buffer space available
+        NOBUFS = 55,
+        /// Transport endpoint is already connected
+        ISCONN = 56,
+        /// Transport endpoint is not connected
+        NOTCONN = 57,
+        /// Cannot send after transport endpoint shutdown
+        SHUTDOWN = 58,
+        /// Too many references: cannot splice
+        TOOMANYREFS = 59,
+        /// Connection timed out
+        TIMEDOUT = 60,
+        /// Connection refused
+        CONNREFUSED = 61,
+        /// Too many symbolic links encountered
+        LOOP = 62,
+        /// File name too long
+        NAMETOOLONG = 63,
+        /// Host is down
+        HOSTDOWN = 64,
+        /// No route to host
+        HOSTUNREACH = 65,
+        /// Directory not empty
+        NOTEMPTY = 66,
+
+        /// Too many users
+        USERS = 68,
+        /// Quota exceeded
+        DQUOT = 69,
+        /// Stale file handle
+        STALE = 70,
+        /// Object is remote
+        REMOTE = 71,
+
+        /// No record locks available
+        NOLCK = 77,
+        /// Function not implemented
+        NOSYS = 78,
+
+        /// No message of desired type
+        NOMSG = 80,
+        /// Identifier removed
+        IDRM = 81,
+        /// Out of streams resources
+        NOSR = 82,
+        /// Timer expired
+        TIME = 83,
+        /// Not a data message
+        /// Also used for FSBADCRC.
+        BADMSG = 84,
+        /// Protocol error
+        PROTO = 85,
+        /// No data available
+        NODATA = 86,
+        /// Device not a stream
+        NOSTR = 87,
+
+        /// Package not installed
+        NOPKG = 92,
+
+        /// Illegal byte sequence
+        ILSEQ = 116,
+
+        // The following are designated "random noise" by the kernel sources.
+        /// Channel number out of range
+        CHRNG = 88,
+        /// Level 2 not synchronized
+        L2NSYNC = 89,
+        /// Level 3 halted
+        L3HLT = 90,
+        /// Level 3 reset
+        L3RST = 91,
+
+        /// Link number out of range
+        LNRNG = 93,
+        /// Protocol driver not attached
+        UNATCH = 94,
+        /// No CSI structure available
+        NOCSI = 95,
+        /// Level 2 halted
+        L2HLT = 96,
+        /// Invalid exchange
+        BADE = 97,
+        /// Invalid request descriptor
+        BADR = 98,
+        /// Exchange full
+        XFULL = 99,
+        /// No anode
+        NOANO = 100,
+        /// Invalid request code
+        BADRQC = 101,
+        /// Invalid slot
+        BADSLT = 102,
+
+        /// Bad font file format
+        BFONT = 104,
+        /// Machine is not on the network
+        NONET = 105,
+        /// Link has been severed
+        NOLINK = 106,
+        /// Advertise error
+        ADV = 107,
+        /// Srmount error
+        SRMNT = 108,
+        /// Communication error on send
+        COMM = 109,
+        /// Multihop attempted
+        MULTIHOP = 110,
+        /// RFS specific error
+        DOTDOT = 111,
+        /// Value too large for defined data type
+        OVERFLOW = 112,
+        /// Name not unique on network
+        NOTUNIQ = 113,
+        /// File descriptor in bad state
+        BADFD = 114,
+        /// Remote address changed
+        REMCHG = 115,
+
+        /// Structure needs cleaning
+        /// Also used for FSCORRUPTED.
+        UCLEAN = 117,
+        /// Not a XENIX named type file
+        NOTNAM = 118,
+        /// No XENIX semaphores available
+        NAVAIL = 119,
+        /// Is a named type file
+        ISNAM = 120,
+        /// Remote I/O error
+        REMOTEIO = 121,
+
+        /// Can not access a needed shared library
+        LIBACC = 122,
+        /// Accessing a corrupted shared library
+        LIBBAD = 123,
+        /// .lib section in a.out corrupted
+        LIBSCN = 124,
+        /// Attempting to link in too many shared libraries
+        LIBMAX = 125,
+        /// Cannot exec a shared library directly
+        LIBEXEC = 126,
+        /// Interrupted system call should be restarted
+        RESTART = 127,
+        /// Streams pipe error
+        STRPIPE = 128,
+
+        /// No medium found
+        NOMEDIUM = 129,
+        /// Wrong medium type
+        MEDIUMTYPE = 130,
+        /// Operation Cancelled
+        CANCELED = 131,
+        /// Required key not available
+        NOKEY = 132,
+        /// Key has expired
+        KEYEXPIRED = 133,
+        /// Key has been revoked
+        KEYREVOKED = 134,
+        /// Key was rejected by service
+        KEYREJECTED = 135,
+
+        // For robust mutexes
+        /// Owner died
+        OWNERDEAD = 136,
+        /// State not recoverable
+        NOTRECOVERABLE = 137,
+
+        /// Operation not possible due to RF-kill
+        RFKILL = 138,
+        /// Memory page has hardware error
+        HWPOISON = 139,
+        _,
+    },
     else => enum(u16) {
         /// No error occurred.
         /// Same code used for `NSROK`.
@@ -3959,6 +4342,14 @@ pub const SA = if (is_mips) struct {
     pub const RESETHAND = 0x80000000;
     pub const ONSTACK = 0x08000000;
     pub const NODEFER = 0x40000000;
+} else if (native_arch == .alpha) struct {
+    pub const ONSTACK = 0x00000001;
+    pub const RESTART = 0x00000002;
+    pub const NOCLDSTOP = 0x00000004;
+    pub const NODEFER = 0x00000008;
+    pub const RESETHAND = 0x00000010;
+    pub const NOCLDWAIT = 0x00000020;
+    pub const SIGINFO = 0x00000040;
 } else struct {
     pub const NOCLDSTOP = 1;
     pub const NOCLDWAIT = 2;
@@ -4061,6 +4452,95 @@ pub const SIG = if (is_mips) enum(u32) {
     USR1 = 30,
     USR2 = 31,
     _,
+} else if (native_arch == .alpha) enum(u32) {
+    pub const BLOCK = 1;
+    pub const UNBLOCK = 2;
+    pub const SETMASK = 3;
+
+    pub const ERR: ?Sigaction.handler_fn = @ptrFromInt(maxInt(usize));
+    pub const DFL: ?Sigaction.handler_fn = @ptrFromInt(0);
+    pub const IGN: ?Sigaction.handler_fn = @ptrFromInt(1);
+
+    pub const POLL: SIG = .IO;
+    pub const PWR: SIG = .INFO;
+    pub const IOT: SIG = .ABRT;
+
+    HUP = 1,
+    INT = 2,
+    QUIT = 3,
+    ILL = 4,
+    TRAP = 5,
+    ABRT = 6,
+    EMT = 7,
+    FPE = 8,
+    KILL = 9,
+    BUS = 10,
+    SEGV = 11,
+    SYS = 12,
+    PIPE = 13,
+    ALRM = 14,
+    TERM = 15,
+    URG = 16,
+    STOP = 17,
+    TSTP = 18,
+    CONT = 19,
+    CHLD = 20,
+    TTIN = 21,
+    TTOU = 22,
+    IO = 23,
+    XCPU = 24,
+    XFSZ = 25,
+    VTALRM = 26,
+    PROF = 27,
+    WINCH = 28,
+    INFO = 29,
+    USR1 = 30,
+    USR2 = 31,
+    _,
+} else if (is_hppa) enum(u32) {
+    pub const BLOCK = 0;
+    pub const UNBLOCK = 1;
+    pub const SETMASK = 2;
+
+    pub const ERR: ?Sigaction.handler_fn = @ptrFromInt(maxInt(usize));
+    pub const DFL: ?Sigaction.handler_fn = @ptrFromInt(0);
+    pub const IGN: ?Sigaction.handler_fn = @ptrFromInt(1);
+
+    pub const POLL: SIG = .IO;
+    pub const IOT: SIG = .ABRT;
+
+    HUP = 1,
+    INT = 2,
+    QUIT = 3,
+    ILL = 4,
+    TRAP = 5,
+    ABRT = 6,
+    STKFLT = 7,
+    FPE = 8,
+    KILL = 9,
+    BUS = 10,
+    SEGV = 11,
+    XCPU = 12,
+    PIPE = 13,
+    ALRM = 14,
+    TERM = 15,
+    USR1 = 16,
+    USR2 = 17,
+    CHLD = 18,
+    PWR = 19,
+    VTALRM = 20,
+    PROF = 21,
+    IO = 22,
+    WINCH = 23,
+    STOP = 24,
+    TSTP = 25,
+    CONT = 26,
+    TTIN = 27,
+    TTOU = 28,
+    URG = 29,
+    XFSZ = 30,
+    SYS = 31,
+    _,
 } else enum(u32) {
     pub const BLOCK = 0;
     pub const UNBLOCK = 1;
@@ -4137,8 +4617,20 @@ pub const SOCK = struct {
     pub const SEQPACKET = 5;
     pub const DCCP = 6;
     pub const PACKET = 10;
-    pub const CLOEXEC = if (is_sparc) 0o20000000 else 0o2000000;
-    pub const NONBLOCK = if (is_mips) 0o200 else if (is_sparc) 0o40000 else 0o4000;
+    pub const CLOEXEC = if (is_sparc)
+        0o20000000
+    else if (native_arch == .alpha)
+        0o10000000
+    else
+        0o2000000;
+    pub const NONBLOCK = if (is_mips)
+        0o200
+    else if (is_sparc)
+        0o40000
+    else if (is_hppa or native_arch == .alpha)
+        0x40000000
+    else
+        0o4000;
 };
 
 pub const TCP = struct {
@@ -4552,6 +5044,77 @@ pub const SO = if (is_mips) struct {
     pub const RCVTIMEO_NEW = 68;
     pub const SNDTIMEO_NEW = 69;
     pub const DETACH_REUSEPORT_BPF = 71;
+} else if (native_arch == .alpha) struct {
+    pub const DEBUG = 1;
+    pub const REUSEADDR = 0x0004;
+    pub const KEEPALIVE = 0x0008;
+    pub const DONTROUTE = 0x0010;
+    pub const BROADCAST = 0x0020;
+    pub const LINGER = 0x0080;
+    pub const OOBINLINE = 0x0100;
+    pub const REUSEPORT = 0x0200;
+
+    pub const SNDBUF = 0x1001;
+    pub const RCVBUF = 0x1002;
+    pub const SNDLOWAT = 0x1011;
+    pub const RCVLOWAT = 0x1010;
+    pub const RCVTIMEO = 0x1012;
+    pub const SNDTIMEO = 0x1013;
+    pub const ERROR = 0x1007;
+    pub const TYPE = 0x1008;
+    pub const ACCEPTCONN = 0x1014;
+    pub const PROTOCOL = 0x1028;
+    pub const DOMAIN = 0x1029;
+
+    pub const NO_CHECK = 11;
+    pub const PRIORITY = 12;
+    pub const BSDCOMPAT = 14;
+    pub const PASSCRED = 17;
+    pub const PEERCRED = 18;
+    pub const PEERSEC = 30;
+    pub const SNDBUFFORCE = 0x100a;
+    pub const RCVBUFFORCE = 0x100b;
+    pub const SECURITY_AUTHENTICATION = 19;
+    pub const SECURITY_ENCRYPTION_TRANSPORT = 20;
+    pub const SECURITY_ENCRYPTION_NETWORK = 21;
+    pub const BINDTODEVICE = 25;
+    pub const ATTACH_FILTER = 26;
+    pub const DETACH_FILTER = 27;
+    pub const GET_FILTER = ATTACH_FILTER;
+    pub const PEERNAME = 28;
+    pub const TIMESTAMP_OLD = 29;
+    pub const PASSSEC = 34;
+    pub const TIMESTAMPNS_OLD = 35;
+    pub const MARK = 36;
+    pub const TIMESTAMPING_OLD = 37;
+    pub const RXQ_OVFL = 40;
+    pub const WIFI_STATUS = 41;
+    pub const PEEK_OFF = 42;
+    pub const NOFCS = 43;
+    pub const LOCK_FILTER = 44;
+    pub const SELECT_ERR_QUEUE = 45;
+    pub const BUSY_POLL = 46;
+    pub const MAX_PACING_RATE = 47;
+    pub const BPF_EXTENSIONS = 48;
+    pub const INCOMING_CPU = 49;
+    pub const ATTACH_BPF = 50;
+    pub const DETACH_BPF = DETACH_FILTER;
+    pub const ATTACH_REUSEPORT_CBPF = 51;
+    pub const ATTACH_REUSEPORT_EBPF = 52;
+    pub const CNX_ADVICE = 53;
+    pub const MEMINFO = 55;
+    pub const INCOMING_NAPI_ID = 56;
+    pub const COOKIE = 57;
+    pub const PEERGROUPS = 59;
+    pub const ZEROCOPY = 60;
+    pub const TXTIME = 61;
+    pub const BINDTOIFINDEX = 62;
+    pub const TIMESTAMP_NEW = 63;
+    pub const TIMESTAMPNS_NEW = 64;
+    pub const TIMESTAMPING_NEW = 65;
+    pub const RCVTIMEO_NEW = 66;
+    pub const SNDTIMEO_NEW = 67;
+    pub const DETACH_REUSEPORT_BPF = 68;
 } else struct {
     pub const DEBUG = 1;
     pub const REUSEADDR = 2;
@@ -4637,7 +5200,10 @@ pub const SCM = struct {
 };
 
 pub const SOL = struct {
-    pub const SOCKET = if (is_mips or is_sparc) 65535 else 1;
+    pub const SOCKET = if (is_mips or is_sparc or native_arch == .alpha)
+        0xffff
+    else
+        1;
 
     pub const IP = 0;
     pub const IPV6 = 41;
@@ -5224,7 +5790,7 @@ pub const T = if (is_mips) struct {
     pub const IOCSERSETMULTI = 0x5490;
     pub const IOCMIWAIT = 0x5491;
     pub const IOCGICOUNT = 0x5492;
-} else if (is_ppc) struct {
+} else if (is_ppc or native_arch == .alpha) struct {
     pub const FIOCLEX = IOCTL.IO('f', 1);
     pub const FIONCLEX = IOCTL.IO('f', 2);
     pub const FIOASYNC = IOCTL.IOW('f', 125, c_int);
@@ -6008,6 +6574,15 @@ pub const TFD = switch (native_arch) {
 
         pub const TIMER = TFD_TIMER;
     },
+    .alpha => packed struct(u32) {
+        _0: u2 = 0,
+        NONBLOCK: bool = false,
+        _3: u18 = 0,
+        CLOEXEC: bool = false,
+        _: u10 = 0,
+
+        pub const TIMER = TFD_TIMER;
+    },
     else => packed struct(u32) {
         _0: u11 = 0,
         NONBLOCK: bool = false,
@@ -6037,6 +6612,11 @@ pub const k_sigaction = switch (native_arch) {
         flags: c_ulong,
         mask: sigset_t,
     },
+    .alpha => extern struct {
+        handler: k_sigaction_funcs.handler,
+        mask: sigset_t,
+        flags: c_int,
+    },
     else => extern struct {
         handler: k_sigaction_funcs.handler,
         flags: c_ulong,
@@ -6061,6 +6641,7 @@ pub const Sigaction = struct {
     mask: sigset_t,
     flags: switch (native_arch) {
         .mips, .mipsel, .mips64, .mips64el => c_uint,
+        .alpha => c_int,
         else => c_ulong,
     },
 };
@@ -7531,7 +8112,14 @@ pub const rusage = extern struct {
 };
 
 pub const NCC = if (is_ppc) 10 else 8;
-pub const NCCS = if (is_mips) 32 else if (is_ppc) 19 else if (is_sparc) 17 else 32;
+pub const NCCS = if (is_mips)
+    32
+else if (is_ppc or native_arch == .alpha)
+    19
+else if (is_sparc)
+    17
+else
+    32;
 
 pub const speed_t = if (is_ppc) enum(c_uint) {
     B0 = 0x0000000,
@@ -7645,7 +8233,7 @@ pub const speed_t = if (is_ppc) enum(c_uint) {
 
 pub const tcflag_t = if (native_arch == .sparc) c_ulong else c_uint;
 
-pub const tc_iflag_t = if (is_ppc) packed struct(tcflag_t) {
+pub const tc_iflag_t = if (is_ppc or native_arch == .alpha) packed struct(tcflag_t) {
     IGNBRK: bool = false,
     BRKINT: bool = false,
     IGNPAR: bool = false,
@@ -7681,7 +8269,7 @@ pub const tc_iflag_t = if (is_ppc) packed struct(tcflag_t) {
     _15: u17 = 0,
 };
 
-pub const NLDLY = if (is_ppc) enum(u2) {
+pub const NLDLY = if (is_ppc or native_arch == .alpha) enum(u2) {
     NL0 = 0,
     NL1 = 1,
     NL2 = 2,
@@ -7722,7 +8310,7 @@ pub const FFDLY = enum(u1) {
     FF1 = 1,
 };
 
-pub const tc_oflag_t = if (is_ppc) packed struct(tcflag_t) {
+pub const tc_oflag_t = if (is_ppc or native_arch == .alpha) packed struct(tcflag_t) {
     OPOST: bool = false,
     ONLCR: bool = false,
     OLCUC: bool = false,
@@ -7781,7 +8369,7 @@ pub const CSIZE = enum(u2) {
     CS8 = 3,
 };
 
-pub const tc_cflag_t = if (is_ppc) packed struct(tcflag_t) {
+pub const tc_cflag_t = if (is_ppc or native_arch == .alpha) packed struct(tcflag_t) {
     _0: u8 = 0,
     CSIZE: CSIZE = .CS5,
     CSTOPB: bool = false,
@@ -7828,7 +8416,7 @@ pub const tc_lflag_t = if (is_mips) packed struct(tcflag_t) {
     TOSTOP: bool = false,
     EXTPROC: bool = false,
     _17: u15 = 0,
-} else if (is_ppc) packed struct(tcflag_t) {
+} else if (is_ppc or native_arch == .alpha) packed struct(tcflag_t) {
     ECHOKE: bool = false,
     ECHOE: bool = false,
     ECHOK: bool = false,
@@ -7929,6 +8517,24 @@ pub const V = if (is_mips) enum(u32) {
     STOP = 14,
     LNEXT = 15,
     DISCARD = 16,
+} else if (arch_bits == .alpha) enum(u32) {
+    EOF = 0,
+    EOL = 1,
+    EOL2 = 2,
+    ERASE = 3,
+    WERASE = 4,
+    KILL = 5,
+    REPRINT = 6,
+    SWTC = 7,
+    INTR = 8,
+    QUIT = 9,
+    SUSP = 10,
+    START = 12,
+    STOP = 13,
+    LNEXT = 14,
+    DISCARD = 15,
+    MIN = 16,
+    TIME = 17,
 } else enum(u32) {
     INTR = 0,
     QUIT = 1,
@@ -7959,7 +8565,7 @@ pub const sgttyb = if (is_mips or is_ppc or is_sparc) extern struct {
     flags: if (is_mips) c_int else c_short,
 } else void;
 
-pub const tchars = if (is_mips or is_ppc or is_sparc) extern struct {
+pub const tchars = if (is_mips or is_ppc or is_sparc or native_arch == .alpha) extern struct {
     intrc: c_char,
     quitc: c_char,
     startc: c_char,
@@ -7968,7 +8574,7 @@ pub const tchars = if (is_mips or is_ppc or is_sparc) extern struct {
     brkc: c_char,
 } else void;
 
-pub const ltchars = if (is_mips or is_ppc or is_sparc) extern struct {
+pub const ltchars = if (is_mips or is_ppc or is_sparc or native_arch == .alpha) extern struct {
     suspc: c_char,
     dsuspc: c_char,
     rprntc: c_char,
@@ -7993,7 +8599,7 @@ pub const termios = if (is_mips or is_sparc) extern struct {
     lflag: tc_lflag_t,
     line: cc_t,
     cc: [NCCS]cc_t,
-} else if (is_ppc) extern struct {
+} else if (is_ppc or native_arch == .alpha) extern struct {
     iflag: tc_iflag_t,
     oflag: tc_oflag_t,
     cflag: tc_cflag_t,
@@ -8013,7 +8619,7 @@ pub const termios = if (is_mips or is_sparc) extern struct {
     ospeed: speed_t,
 };
 
-pub const termios2 = if (is_mips) extern struct {
+pub const termios2 = if (is_mips or native_arch == .alpha) extern struct {
     iflag: tc_iflag_t,
     oflag: tc_oflag_t,
     cflag: tc_cflag_t,
@@ -8592,6 +9198,49 @@ pub const rlimit_resource = if (native_arch.isMIPS()) enum(c_int) {
     /// call before being forcibly descheduled.
     RTTIME = 15,
 
+    _,
+} else if (native_arch == .alpha) enum(c_int) {
+    /// Per-process CPU limit, in seconds.
+    CPU = 0,
+    /// Largest file that can be created, in bytes.
+    FSIZE = 1,
+    /// Maximum size of data segment, in bytes.
+    DATA = 2,
+    /// Maximum size of stack segment, in bytes.
+    STACK = 3,
+    /// Largest core file that can be created, in bytes.
+    CORE = 4,
+    /// Largest resident set size, in bytes.
+    /// This affects swapping; processes that are exceeding their
+    /// resident set size will be more likely to have physical memory
+    /// taken from them.
+    RSS = 5,
+    /// Number of open files.
+    NOFILE = 6,
+    /// Address space limit.
+    AS = 7,
+    /// Number of processes.
+    NPROC = 8,
+    /// Locked-in-memory address space.
+    MEMLOCK = 9,
+    /// Maximum number of file locks.
+    LOCKS = 10,
+    /// Maximum number of pending signals.
+    SIGPENDING = 11,
+    /// Maximum bytes in POSIX message queues.
+    MSGQUEUE = 12,
+    /// Maximum nice priority allowed to raise to.
+    /// Nice levels 19 .. -20 correspond to 0 .. 39
+    /// values of this resource limit.
+    NICE = 13,
+    /// Maximum realtime priority allowed for non-privileged
+    /// processes.
+    RTPRIO = 14,
+    /// Maximum CPU time in µs that a process scheduled under a real-time
+    /// scheduling policy may consume without making a blocking system
+    /// call before being forcibly descheduled.
+    RTTIME = 15,
+
     _,
 } else enum(c_int) {
     /// Per-process CPU limit, in seconds.
@@ -8642,7 +9291,10 @@ pub const rlim_t = u64;
 
 pub const RLIM = struct {
     /// No limit
-    pub const INFINITY = ~@as(rlim_t, 0);
+    pub const INFINITY: rlim_t = if (native_arch == .alpha)
+        ~@as(u63, 0)
+    else
+        ~@as(rlim_t, 0);
 
     pub const SAVED_MAX = INFINITY;
     pub const SAVED_CUR = INFINITY;
diff --git a/lib/std/os/linux/IoUring/test.zig b/lib/std/os/linux/IoUring/test.zig
index 44e570f50b7a49ad36717dfbf4b7bee05094850f..add4f30f8512e1c0c470cba0f253a7ff80159cf1 100644
--- a/lib/std/os/linux/IoUring/test.zig
+++ b/lib/std/os/linux/IoUring/test.zig
@@ -1273,6 +1273,8 @@ test "symlinkat" {
         .SUCCESS => {},
         // This kernel's io_uring does not yet implement symlinkat (kernel version < 5.15)
         .BADF, .INVAL => return error.SkipZigTest,
+        // Can occur on certain filesystems (seen on CIFS)
+        .OPNOTSUPP => return error.SkipZigTest,
         else => |errno| std.debug.panic("unhandled errno: {}", .{errno}),
     }
     try testing.expectEqual(linux.io_uring_cqe{
diff --git a/lib/std/os/linux/alpha.zig b/lib/std/os/linux/alpha.zig
new file mode 100644
index 0000000000000000000000000000000000000000..20bf4bd14bbceacc74e2e9328dcfac74c7603b46
--- /dev/null
+++ b/lib/std/os/linux/alpha.zig
@@ -0,0 +1,358 @@
+const builtin = @import("builtin");
+const std = @import("../../std.zig");
+const SYS = std.os.linux.SYS;
+
+pub fn syscall0(number: SYS) u64 {
+    return asm volatile (
+        \\ callsys
+        \\ beq $19, 1f
+        \\ negq $0, $0
+        \\1:
+        : [ret] "={$0}" (-> u64),
+        : [number] "{$0}" (number),
+        : .{
+          .r1 = true,
+          .r2 = true,
+          .r3 = true,
+          .r4 = true,
+          .r5 = true,
+          .r6 = true,
+          .r7 = true,
+          .r8 = true,
+          .r22 = true,
+          .r23 = true,
+          .r24 = true,
+          .r25 = true,
+          .r27 = true,
+          .r28 = true,
+          .memory = true,
+          .r16 = true,
+          .r17 = true,
+          .r18 = true,
+          .r20 = true,
+          .r21 = true,
+        });
+}
+
+pub fn syscall1(number: SYS, arg1: u64) u64 {
+    // These registers are both inputs and clobbers.
+    var r16_out: u64 = undefined;
+    return asm volatile (
+        \\ callsys
+        \\ beq $19, 1f
+        \\ negq $0, $0
+        \\1:
+        : [ret] "={$0}" (-> u64),
+          [r16_out] "={$16}" (r16_out),
+        : [number] "{$0}" (number),
+          [arg1] "{$16}" (arg1),
+        : .{
+          .r1 = true,
+          .r2 = true,
+          .r3 = true,
+          .r4 = true,
+          .r5 = true,
+          .r6 = true,
+          .r7 = true,
+          .r8 = true,
+          .r22 = true,
+          .r23 = true,
+          .r24 = true,
+          .r25 = true,
+          .r27 = true,
+          .r28 = true,
+          .memory = true,
+          .r17 = true,
+          .r18 = true,
+          .r20 = true,
+          .r21 = true,
+        });
+}
+
+pub fn syscall2(number: SYS, arg1: u64, arg2: u64) u64 {
+    // These registers are both inputs and clobbers.
+    var r16_out: u64 = undefined;
+    var r17_out: u64 = undefined;
+    return asm volatile (
+        \\ callsys
+        \\ beq $19, 1f
+        \\ negq $0, $0
+        \\1:
+        : [ret] "={$0}" (-> u64),
+          [r16_out] "={$16}" (r16_out),
+          [r17_out] "={$17}" (r17_out),
+        : [number] "{$0}" (number),
+          [arg1] "{$16}" (arg1),
+          [arg2] "{$17}" (arg2),
+        : .{
+          .r1 = true,
+          .r2 = true,
+          .r3 = true,
+          .r4 = true,
+          .r5 = true,
+          .r6 = true,
+          .r7 = true,
+          .r8 = true,
+          .r22 = true,
+          .r23 = true,
+          .r24 = true,
+          .r25 = true,
+          .r27 = true,
+          .r28 = true,
+          .memory = true,
+          .r18 = true,
+          .r20 = true,
+          .r21 = true,
+        });
+}
+
+pub fn syscall3(number: SYS, arg1: u64, arg2: u64, arg3: u64) u64 {
+    // These registers are both inputs and clobbers.
+    var r16_out: u64 = undefined;
+    var r17_out: u64 = undefined;
+    var r18_out: u64 = undefined;
+    return asm volatile (
+        \\ callsys
+        \\ beq $19, 1f
+        \\ negq $0, $0
+        \\1:
+        : [ret] "={$0}" (-> u64),
+          [r16_out] "={$16}" (r16_out),
+          [r17_out] "={$17}" (r17_out),
+          [r18_out] "={$18}" (r18_out),
+        : [number] "{$0}" (number),
+          [arg1] "{$16}" (arg1),
+          [arg2] "{$17}" (arg2),
+          [arg3] "{$18}" (arg3),
+        : .{
+          .r1 = true,
+          .r2 = true,
+          .r3 = true,
+          .r4 = true,
+          .r5 = true,
+          .r6 = true,
+          .r7 = true,
+          .r8 = true,
+          .r22 = true,
+          .r23 = true,
+          .r24 = true,
+          .r25 = true,
+          .r27 = true,
+          .r28 = true,
+          .memory = true,
+          .r20 = true,
+          .r21 = true,
+        });
+}
+
+pub fn syscall4(number: SYS, arg1: u64, arg2: u64, arg3: u64, arg4: u64) u64 {
+    // These registers are both inputs and clobbers.
+    var r16_out: u64 = undefined;
+    var r17_out: u64 = undefined;
+    var r18_out: u64 = undefined;
+    var r19_out: u64 = undefined;
+    return asm volatile (
+        \\ callsys
+        \\ beq $19, 1f
+        \\ negq $0, $0
+        \\1:
+        : [ret] "={$0}" (-> u64),
+          [r16_out] "={$16}" (r16_out),
+          [r17_out] "={$17}" (r17_out),
+          [r18_out] "={$18}" (r18_out),
+          [r19_out] "={$19}" (r19_out),
+        : [number] "{$0}" (number),
+          [arg1] "{$16}" (arg1),
+          [arg2] "{$17}" (arg2),
+          [arg3] "{$18}" (arg3),
+          [arg4] "{$19}" (arg4),
+        : .{
+          .r1 = true,
+          .r2 = true,
+          .r3 = true,
+          .r4 = true,
+          .r5 = true,
+          .r6 = true,
+          .r7 = true,
+          .r8 = true,
+          .r22 = true,
+          .r23 = true,
+          .r24 = true,
+          .r25 = true,
+          .r27 = true,
+          .r28 = true,
+          .memory = true,
+          .r20 = true,
+          .r21 = true,
+        });
+}
+
+pub fn syscall5(number: SYS, arg1: u64, arg2: u64, arg3: u64, arg4: u64, arg5: u64) u64 {
+    // These registers are both inputs and clobbers.
+    var r16_out: u64 = undefined;
+    var r17_out: u64 = undefined;
+    var r18_out: u64 = undefined;
+    var r19_out: u64 = undefined;
+    var r20_out: u64 = undefined;
+    return asm volatile (
+        \\ callsys
+        \\ beq $19, 1f
+        \\ negq $0, $0
+        \\1:
+        : [ret] "={$0}" (-> u64),
+          [r16_out] "={$16}" (r16_out),
+          [r17_out] "={$17}" (r17_out),
+          [r18_out] "={$18}" (r18_out),
+          [r19_out] "={$19}" (r19_out),
+          [r20_out] "={$20}" (r20_out),
+        : [number] "{$0}" (number),
+          [arg1] "{$16}" (arg1),
+          [arg2] "{$17}" (arg2),
+          [arg3] "{$18}" (arg3),
+          [arg4] "{$19}" (arg4),
+          [arg5] "{$20}" (arg5),
+        : .{
+          .r1 = true,
+          .r2 = true,
+          .r3 = true,
+          .r4 = true,
+          .r5 = true,
+          .r6 = true,
+          .r7 = true,
+          .r8 = true,
+          .r22 = true,
+          .r23 = true,
+          .r24 = true,
+          .r25 = true,
+          .r27 = true,
+          .r28 = true,
+          .memory = true,
+          .r21 = true,
+        });
+}
+
+pub fn syscall6(
+    number: SYS,
+    arg1: u64,
+    arg2: u64,
+    arg3: u64,
+    arg4: u64,
+    arg5: u64,
+    arg6: u64,
+) u64 {
+    // These registers are both inputs and clobbers.
+    var r16_out: u64 = undefined;
+    var r17_out: u64 = undefined;
+    var r18_out: u64 = undefined;
+    var r19_out: u64 = undefined;
+    var r20_out: u64 = undefined;
+    var r21_out: u64 = undefined;
+    return asm volatile (
+        \\ callsys
+        \\ beq $19, 1f
+        \\ negq $0, $0
+        \\1:
+        : [ret] "={$0}" (-> u64),
+          [r16_out] "={$16}" (r16_out),
+          [r17_out] "={$17}" (r17_out),
+          [r18_out] "={$18}" (r18_out),
+          [r19_out] "={$19}" (r19_out),
+          [r20_out] "={$20}" (r20_out),
+          [r21_out] "={$21}" (r21_out),
+        : [number] "{$0}" (number),
+          [arg1] "{$16}" (arg1),
+          [arg2] "{$17}" (arg2),
+          [arg3] "{$18}" (arg3),
+          [arg4] "{$19}" (arg4),
+          [arg5] "{$20}" (arg5),
+          [arg6] "{$21}" (arg6),
+        : .{
+          .r1 = true,
+          .r2 = true,
+          .r3 = true,
+          .r4 = true,
+          .r5 = true,
+          .r6 = true,
+          .r7 = true,
+          .r8 = true,
+          .r22 = true,
+          .r23 = true,
+          .r24 = true,
+          .r25 = true,
+          .r27 = true,
+          .r28 = true,
+          .memory = true,
+        });
+}
+
+pub fn clone() callconv(.naked) u64 {
+    // __clone(func, stack, flags, arg, ptid, tls, ctid)
+    //         a0,   a1,    a2,    a3,  a4,   a5,  +0
+    //
+    // syscall(SYS_clone, flags, stack, ptid, ctid, tls)
+    //         v0         a0,    a1,    a2,   a3,   a4
+    asm volatile (
+    // a0 = $16, a1 = $17, a2 = $18, a3 = $19,
+    // a4 = $20, a5 = $21, sp = $30, v0 = $0
+        \\ # Save function pointer and argument pointer on new thread stack
+        \\ ldi $1, -8
+        \\ and $17, $17, $1
+        \\ lda $17, -16($17)
+        \\ stq $16, 0($17)
+        \\ stq $19, 8($17)
+        \\
+        \\ # Shuffle (fn,sp,fl,arg,ptid,tls,ctid) to (fl,sp,ptid,ctid,tls)
+        \\ mov $18, $16
+        \\ mov $20, $18
+        \\ ldq $19, 0($30)
+        \\ mov $21, $20
+        \\
+        \\ # Actual syscall
+        \\ ldi $0, 312 # SYS_clone
+        \\ callsys
+        \\ beq $19, 1f
+        \\ negq $0, $0
+        \\ ret
+        \\1:
+        \\ beq $0, 2f
+        \\ ret
+        \\2:
+    );
+    if (builtin.unwind_tables != .none or !builtin.strip_debug_info) asm volatile (
+    // ra = $26
+        \\ .cfi_undefined $26
+    );
+    asm volatile (
+    // v0 = $0, t9 = $23, a0 = $16, ra = $26, sp = $30, fp = $15
+        \\ mov 0, $15
+        \\
+        \\ ldq $23, 0($30)
+        \\ ldq $16, 8($30)
+        \\ lda $30, 16($30)
+        \\ jsr $26, ($23)
+        \\
+        \\ mov $0, $16
+        \\ ldi $0, 1 # SYS_EXIT
+        \\ callsys
+    );
+}
+
+pub fn restore() noreturn {
+    asm volatile (
+    // v0 = $0, a0 = $16, sp = $30
+        \\ mov $30, $16
+        \\ ldi $0, 103 # SIGRETURN
+        \\ callsys
+    );
+}
+
+pub fn restore_rt() noreturn {
+    asm volatile (
+    // v0 = $0, a0 = $16, sp = $30
+        \\ mov $30, $16
+        \\ ldi $0, 351 # RT_SIGRETURN
+        \\ callsys
+    );
+}
+
+pub const VDSO = void;
diff --git a/lib/std/os/linux/ioctl.zig b/lib/std/os/linux/ioctl.zig
index a5a6e854f70defa5f9a0e07547bfbb97909cab8c..4cf1c497ebbfcc6e170c59a4ed7f1c9958c2a518 100644
--- a/lib/std/os/linux/ioctl.zig
+++ b/lib/std/os/linux/ioctl.zig
@@ -11,6 +11,7 @@ const bits = switch (@import("builtin").cpu.arch) {
     .powerpc64le,
     .sparc,
     .sparc64,
+    .alpha,
     => .{ .size = 13, .dir = 3, .none = 1, .read = 2, .write = 4 },
     else => .{ .size = 14, .dir = 2, .none = 0, .read = 2, .write = 1 },
 };
diff --git a/lib/std/os/linux/syscalls.zig b/lib/std/os/linux/syscalls.zig
index afd41fc65b7c2097cccc059cb9b32a8bc9bec6fc..2bf58d4d096fec09ded5eb8e14d34a01fa1a30d9 100644
--- a/lib/std/os/linux/syscalls.zig
+++ b/lib/std/os/linux/syscalls.zig
@@ -5851,6 +5851,508 @@ pub const Xtensa = enum(usize) {
     rseq_slice_yield = 471,
 };
 
+pub const Alpha = enum(usize) {
+    osf_syscall = 0,
+    exit = 1,
+    fork = 2,
+    read = 3,
+    write = 4,
+    osf_old_open = 5,
+    close = 6,
+    osf_wait4 = 7,
+    osf_old_creat = 8,
+    link = 9,
+    unlink = 10,
+    osf_execve = 11,
+    chdir = 12,
+    fchdir = 13,
+    mknod = 14,
+    chmod = 15,
+    chown = 16,
+    brk = 17,
+    osf_getfsstat = 18,
+    lseek = 19,
+    getpid = 20,
+    osf_mount = 21,
+    umount2 = 22,
+    setuid = 23,
+    getuid = 24,
+    exec_with_loader = 25,
+    ptrace = 26,
+    osf_nrecvmsg = 27,
+    osf_nsendmsg = 28,
+    osf_nrecvfrom = 29,
+    osf_naccept = 30,
+    osf_ngetpeername = 31,
+    osf_ngetsockname = 32,
+    access = 33,
+    osf_chflags = 34,
+    osf_fchflags = 35,
+    sync = 36,
+    kill = 37,
+    osf_old_stat = 38,
+    setpgid = 39,
+    osf_old_lstat = 40,
+    dup = 41,
+    pipe = 42,
+    osf_set_program_attributes = 43,
+    osf_profil = 44,
+    open = 45,
+    osf_old_sigaction = 46,
+    getgid = 47,
+    osf_sigprocmask = 48,
+    osf_getlogin = 49,
+    osf_setlogin = 50,
+    acct = 51,
+    sigpending = 52,
+    ioctl = 54,
+    osf_reboot = 55,
+    osf_revoke = 56,
+    symlink = 57,
+    readlink = 58,
+    execve = 59,
+    umask = 60,
+    chroot = 61,
+    osf_old_fstat = 62,
+    getpgrp = 63,
+    getpagesize = 64,
+    osf_mremap = 65,
+    vfork = 66,
+    stat = 67,
+    lstat = 68,
+    osf_sbrk = 69,
+    osf_sstk = 70,
+    mmap = 71,
+    osf_old_vadvise = 72,
+    munmap = 73,
+    mprotect = 74,
+    madvise = 75,
+    vhangup = 76,
+    osf_kmodcall = 77,
+    osf_mincore = 78,
+    getgroups = 79,
+    setgroups = 80,
+    osf_old_getpgrp = 81,
+    setpgrp = 82,
+    osf_setitimer = 83,
+    osf_old_wait = 84,
+    osf_table = 85,
+    osf_getitimer = 86,
+    gethostname = 87,
+    sethostname = 88,
+    getdtablesize = 89,
+    dup2 = 90,
+    fstat = 91,
+    fcntl = 92,
+    osf_select = 93,
+    poll = 94,
+    fsync = 95,
+    setpriority = 96,
+    socket = 97,
+    connect = 98,
+    accept = 99,
+    getpriority = 100,
+    send = 101,
+    recv = 102,
+    sigreturn = 103,
+    bind = 104,
+    setsockopt = 105,
+    listen = 106,
+    osf_plock = 107,
+    osf_old_sigvec = 108,
+    osf_old_sigblock = 109,
+    osf_old_sigsetmask = 110,
+    sigsuspend = 111,
+    osf_sigstack = 112,
+    recvmsg = 113,
+    sendmsg = 114,
+    osf_old_vtrace = 115,
+    osf_gettimeofday = 116,
+    osf_getrusage = 117,
+    getsockopt = 118,
+    readv = 120,
+    writev = 121,
+    osf_settimeofday = 122,
+    fchown = 123,
+    fchmod = 124,
+    recvfrom = 125,
+    setreuid = 126,
+    setregid = 127,
+    rename = 128,
+    truncate = 129,
+    ftruncate = 130,
+    flock = 131,
+    setgid = 132,
+    sendto = 133,
+    shutdown = 134,
+    socketpair = 135,
+    mkdir = 136,
+    rmdir = 137,
+    osf_utimes = 138,
+    osf_old_sigreturn = 139,
+    osf_adjtime = 140,
+    getpeername = 141,
+    osf_gethostid = 142,
+    osf_sethostid = 143,
+    getrlimit = 144,
+    setrlimit = 145,
+    osf_old_killpg = 146,
+    setsid = 147,
+    quotactl = 148,
+    osf_oldquota = 149,
+    getsockname = 150,
+    osf_pid_block = 153,
+    osf_pid_unblock = 154,
+    sigaction = 156,
+    osf_sigwaitprim = 157,
+    osf_nfssvc = 158,
+    osf_getdirentries = 159,
+    osf_statfs = 160,
+    osf_fstatfs = 161,
+    osf_asynch_daemon = 163,
+    osf_getfh = 164,
+    osf_getdomainname = 165,
+    setdomainname = 166,
+    osf_exportfs = 169,
+    osf_alt_plock = 181,
+    osf_getmnt = 184,
+    osf_alt_sigpending = 187,
+    osf_alt_setsid = 188,
+    osf_swapon = 199,
+    msgctl = 200,
+    msgget = 201,
+    msgrcv = 202,
+    msgsnd = 203,
+    semctl = 204,
+    semget = 205,
+    semop = 206,
+    osf_utsname = 207,
+    lchown = 208,
+    shmat = 209,
+    shmctl = 210,
+    shmdt = 211,
+    shmget = 212,
+    osf_mvalid = 213,
+    osf_getaddressconf = 214,
+    osf_msleep = 215,
+    osf_mwakeup = 216,
+    msync = 217,
+    osf_signal = 218,
+    osf_utc_gettime = 219,
+    osf_utc_adjtime = 220,
+    osf_security = 222,
+    osf_kloadcall = 223,
+    osf_stat = 224,
+    osf_lstat = 225,
+    osf_fstat = 226,
+    osf_statfs64 = 227,
+    osf_fstatfs64 = 228,
+    getpgid = 233,
+    getsid = 234,
+    sigaltstack = 235,
+    osf_waitid = 236,
+    osf_priocntlset = 237,
+    osf_sigsendset = 238,
+    osf_set_speculative = 239,
+    osf_msfs_syscall = 240,
+    osf_sysinfo = 241,
+    osf_uadmin = 242,
+    osf_fuser = 243,
+    osf_proplist_syscall = 244,
+    osf_ntp_adjtime = 245,
+    osf_ntp_gettime = 246,
+    osf_pathconf = 247,
+    osf_fpathconf = 248,
+    osf_uswitch = 250,
+    osf_usleep_thread = 251,
+    osf_audcntl = 252,
+    osf_audgen = 253,
+    sysfs = 254,
+    osf_subsys_info = 255,
+    osf_getsysinfo = 256,
+    osf_setsysinfo = 257,
+    osf_afs_syscall = 258,
+    osf_swapctl = 259,
+    osf_memcntl = 260,
+    osf_fdatasync = 261,
+    bdflush = 300,
+    sethae = 301,
+    mount = 302,
+    old_adjtimex = 303,
+    swapoff = 304,
+    getdents = 305,
+    create_module = 306,
+    init_module = 307,
+    delete_module = 308,
+    get_kernel_syms = 309,
+    syslog = 310,
+    reboot = 311,
+    clone = 312,
+    uselib = 313,
+    mlock = 314,
+    munlock = 315,
+    mlockall = 316,
+    munlockall = 317,
+    sysinfo = 318,
+    sysctl = 319,
+    oldumount = 321,
+    swapon = 322,
+    times = 323,
+    personality = 324,
+    setfsuid = 325,
+    setfsgid = 326,
+    ustat = 327,
+    statfs = 328,
+    fstatfs = 329,
+    sched_setparam = 330,
+    sched_getparam = 331,
+    sched_setscheduler = 332,
+    sched_getscheduler = 333,
+    sched_yield = 334,
+    sched_get_priority_max = 335,
+    sched_get_priority_min = 336,
+    sched_rr_get_interval = 337,
+    afs_syscall = 338,
+    uname = 339,
+    nanosleep = 340,
+    mremap = 341,
+    nfsservctl = 342,
+    setresuid = 343,
+    getresuid = 344,
+    pciconfig_read = 345,
+    pciconfig_write = 346,
+    query_module = 347,
+    prctl = 348,
+    pread64 = 349,
+    pwrite64 = 350,
+    rt_sigreturn = 351,
+    rt_sigaction = 352,
+    rt_sigprocmask = 353,
+    rt_sigpending = 354,
+    rt_sigtimedwait = 355,
+    rt_sigqueueinfo = 356,
+    rt_sigsuspend = 357,
+    select = 358,
+    gettimeofday = 359,
+    settimeofday = 360,
+    getitimer = 361,
+    setitimer = 362,
+    utimes = 363,
+    getrusage = 364,
+    wait4 = 365,
+    adjtimex = 366,
+    getcwd = 367,
+    capget = 368,
+    capset = 369,
+    sendfile = 370,
+    setresgid = 371,
+    getresgid = 372,
+    dipc = 373,
+    pivot_root = 374,
+    mincore = 375,
+    pciconfig_iobase = 376,
+    getdents64 = 377,
+    gettid = 378,
+    readahead = 379,
+    tkill = 381,
+    setxattr = 382,
+    lsetxattr = 383,
+    fsetxattr = 384,
+    getxattr = 385,
+    lgetxattr = 386,
+    fgetxattr = 387,
+    listxattr = 388,
+    llistxattr = 389,
+    flistxattr = 390,
+    removexattr = 391,
+    lremovexattr = 392,
+    fremovexattr = 393,
+    futex = 394,
+    sched_setaffinity = 395,
+    sched_getaffinity = 396,
+    tuxcall = 397,
+    io_setup = 398,
+    io_destroy = 399,
+    io_getevents = 400,
+    io_submit = 401,
+    io_cancel = 402,
+    exit_group = 405,
+    lookup_dcookie = 406,
+    epoll_create = 407,
+    epoll_ctl = 408,
+    epoll_wait = 409,
+    remap_file_pages = 410,
+    set_tid_address = 411,
+    restart_syscall = 412,
+    fadvise64 = 413,
+    timer_create = 414,
+    timer_settime = 415,
+    timer_gettime = 416,
+    timer_getoverrun = 417,
+    timer_delete = 418,
+    clock_settime = 419,
+    clock_gettime = 420,
+    clock_getres = 421,
+    clock_nanosleep = 422,
+    semtimedop = 423,
+    tgkill = 424,
+    stat64 = 425,
+    lstat64 = 426,
+    fstat64 = 427,
+    vserver = 428,
+    mbind = 429,
+    get_mempolicy = 430,
+    set_mempolicy = 431,
+    mq_open = 432,
+    mq_unlink = 433,
+    mq_timedsend = 434,
+    mq_timedreceive = 435,
+    mq_notify = 436,
+    mq_getsetattr = 437,
+    waitid = 438,
+    add_key = 439,
+    request_key = 440,
+    keyctl = 441,
+    ioprio_set = 442,
+    ioprio_get = 443,
+    inotify_init = 444,
+    inotify_add_watch = 445,
+    inotify_rm_watch = 446,
+    fdatasync = 447,
+    kexec_load = 448,
+    migrate_pages = 449,
+    openat = 450,
+    mkdirat = 451,
+    mknodat = 452,
+    fchownat = 453,
+    futimesat = 454,
+    fstatat64 = 455,
+    unlinkat = 456,
+    renameat = 457,
+    linkat = 458,
+    symlinkat = 459,
+    readlinkat = 460,
+    fchmodat = 461,
+    faccessat = 462,
+    pselect6 = 463,
+    ppoll = 464,
+    unshare = 465,
+    set_robust_list = 466,
+    get_robust_list = 467,
+    splice = 468,
+    sync_file_range = 469,
+    tee = 470,
+    vmsplice = 471,
+    move_pages = 472,
+    getcpu = 473,
+    epoll_pwait = 474,
+    utimensat = 475,
+    signalfd = 476,
+    timerfd = 477,
+    eventfd = 478,
+    recvmmsg = 479,
+    fallocate = 480,
+    timerfd_create = 481,
+    timerfd_settime = 482,
+    timerfd_gettime = 483,
+    signalfd4 = 484,
+    eventfd2 = 485,
+    epoll_create1 = 486,
+    dup3 = 487,
+    pipe2 = 488,
+    inotify_init1 = 489,
+    preadv = 490,
+    pwritev = 491,
+    rt_tgsigqueueinfo = 492,
+    perf_event_open = 493,
+    fanotify_init = 494,
+    fanotify_mark = 495,
+    prlimit64 = 496,
+    name_to_handle_at = 497,
+    open_by_handle_at = 498,
+    clock_adjtime = 499,
+    syncfs = 500,
+    setns = 501,
+    accept4 = 502,
+    sendmmsg = 503,
+    process_vm_readv = 504,
+    process_vm_writev = 505,
+    kcmp = 506,
+    finit_module = 507,
+    sched_setattr = 508,
+    sched_getattr = 509,
+    renameat2 = 510,
+    getrandom = 511,
+    memfd_create = 512,
+    execveat = 513,
+    seccomp = 514,
+    bpf = 515,
+    userfaultfd = 516,
+    membarrier = 517,
+    mlock2 = 518,
+    copy_file_range = 519,
+    preadv2 = 520,
+    pwritev2 = 521,
+    statx = 522,
+    io_pgetevents = 523,
+    pkey_mprotect = 524,
+    pkey_alloc = 525,
+    pkey_free = 526,
+    rseq = 527,
+    statfs64 = 528,
+    fstatfs64 = 529,
+    getegid = 530,
+    geteuid = 531,
+    getppid = 532,
+    pidfd_send_signal = 534,
+    io_uring_setup = 535,
+    io_uring_enter = 536,
+    io_uring_register = 537,
+    open_tree = 538,
+    move_mount = 539,
+    fsopen = 540,
+    fsconfig = 541,
+    fsmount = 542,
+    fspick = 543,
+    pidfd_open = 544,
+    clone3 = 545,
+    close_range = 546,
+    openat2 = 547,
+    pidfd_getfd = 548,
+    faccessat2 = 549,
+    process_madvise = 550,
+    epoll_pwait2 = 551,
+    mount_setattr = 552,
+    quotactl_fd = 553,
+    landlock_create_ruleset = 554,
+    landlock_add_rule = 555,
+    landlock_restrict_self = 556,
+    process_mrelease = 558,
+    futex_waitv = 559,
+    set_mempolicy_home_node = 560,
+    cachestat = 561,
+    fchmodat2 = 562,
+    map_shadow_stack = 563,
+    futex_wake = 564,
+    futex_wait = 565,
+    futex_requeue = 566,
+    statmount = 567,
+    listmount = 568,
+    lsm_get_self_attr = 569,
+    lsm_set_self_attr = 570,
+    lsm_list_modules = 571,
+    mseal = 572,
+    setxattrat = 573,
+    getxattrat = 574,
+    listxattrat = 575,
+    removexattrat = 576,
+    open_tree_attr = 577,
+    file_getattr = 578,
+    file_setattr = 579,
+    listns = 580,
+    rseq_slice_yield = 581,
+};
+
 pub const Arm64 = enum(usize) {
     io_setup = 0,
     io_destroy = 1,
diff --git a/lib/std/os/linux/tls.zig b/lib/std/os/linux/tls.zig
index 3d180f05dce1bc8e3a7a3fb7d818651bd9cf6055..e188f954626cb7b6ad9b78faf5d723ffc2eae4cd 100644
--- a/lib/std/os/linux/tls.zig
+++ b/lib/std/os/linux/tls.zig
@@ -256,7 +256,7 @@ pub fn setThreadPointer(addr: usize) void {
         },
         .alpha => {
             asm volatile (
-                \\ lda a0, %[addr]
+                \\ lda $16, 0(%[addr])
                 \\ wruniq
                 :
                 : [addr] "r" (addr),
diff --git a/tools/generate_linux_syscalls.zig b/tools/generate_linux_syscalls.zig
index de537563127047c338ea71390c717589e9e426f1..d612138eb2673b4620fb54b87fbb4e3d6c38947d 100644
--- a/tools/generate_linux_syscalls.zig
+++ b/tools/generate_linux_syscalls.zig
@@ -28,6 +28,11 @@ const stdlib_renames = std.StaticStringMap([]const u8).initComptime(.{
     // ARM EABI/Thumb.
     .{ "arm_sync_file_range", "sync_file_range" },
     .{ "arm_fadvise64_64", "fadvise64_64" },
+    // Alpha
+    // See https://github.com/torvalds/linux/blob/8bf22c33e7a172fbc72464f4cc484d23a6b412ba/arch/alpha/include/uapi/asm/unistd.h#L10
+    .{ "getxpid", "getpid" },
+    .{ "getxuid", "getuid" },
+    .{ "getxgid", "getgid" },
 });
 
 /// Filter syscalls that aren't actually syscalls.
@@ -156,6 +161,7 @@ const architectures: []const Arch = &.{
     .{ .@"var" = "PowerPC64", .table = .{ .specific = "arch/powerpc/kernel/syscalls/syscall.tbl" }, .abi = &.{ .common, .@"64", .nospu } },
     .{ .@"var" = "S390x", .table = .{ .specific = "arch/s390/kernel/syscalls/syscall.tbl" }, .abi = &.{ .common, .@"64" } },
     .{ .@"var" = "Xtensa", .table = .{ .specific = "arch/xtensa/kernel/syscalls/syscall.tbl" } },
+    .{ .@"var" = "Alpha", .table = .{ .specific = "arch/alpha/kernel/syscalls/syscall.tbl" } },
     .{ .@"var" = "Arm64", .table = .generic, .abi = &.{ .common, .@"64", .renameat, .rlimit, .memfd_secret } },
     .{ .@"var" = "RiscV32", .table = .generic, .abi = &.{ .common, .@"32", .riscv, .memfd_secret } },
     .{ .@"var" = "RiscV64", .table = .generic, .abi = &.{ .common, .@"64", .riscv, .rlimit, .memfd_secret } },