blob 899bb2a0 (42803B) - Raw
1 // This file provides the system interface functions for Linux matching those 2 // that are provided by libc, whether or not libc is linked. The following 3 // abstractions are made: 4 // * Work around kernel bugs and limitations. For example, see sendmmsg. 5 // * Implement all the syscalls in the same way that libc functions will 6 // provide `rename` when only the `renameat` syscall exists. 7 // * Does not support POSIX thread cancellation. 8 const std = @import("../std.zig"); 9 const builtin = @import("builtin"); 10 const assert = std.debug.assert; 11 const maxInt = std.math.maxInt; 12 const elf = std.elf; 13 const vdso = @import("linux/vdso.zig"); 14 const dl = @import("../dynamic_library.zig"); 15 16 pub usingnamespace switch (builtin.arch) { 17 .i386 => @import("linux/i386.zig"), 18 .x86_64 => @import("linux/x86_64.zig"), 19 .aarch64 => @import("linux/arm64.zig"), 20 .arm => @import("linux/arm-eabi.zig"), 21 .riscv64 => @import("linux/riscv64.zig"), 22 .mipsel => @import("linux/mipsel.zig"), 23 else => struct {}, 24 }; 25 pub usingnamespace @import("bits.zig"); 26 pub const tls = @import("linux/tls.zig"); 27 28 /// Set by startup code, used by `getauxval`. 29 pub var elf_aux_maybe: ?[*]std.elf.Auxv = null; 30 31 /// See `std.elf` for the constants. 32 pub fn getauxval(index: usize) usize { 33 const auxv = elf_aux_maybe orelse return 0; 34 var i: usize = 0; 35 while (auxv[i].a_type != std.elf.AT_NULL) : (i += 1) { 36 if (auxv[i].a_type == index) 37 return auxv[i].a_un.a_val; 38 } 39 return 0; 40 } 41 42 /// Get the errno from a syscall return value, or 0 for no error. 43 pub fn getErrno(r: usize) u12 { 44 const signed_r = @bitCast(isize, r); 45 return if (signed_r > -4096 and signed_r < 0) @intCast(u12, -signed_r) else 0; 46 } 47 48 pub fn dup2(old: i32, new: i32) usize { 49 if (@hasDecl(@This(), "SYS_dup2")) { 50 return syscall2(SYS_dup2, @bitCast(usize, @as(isize, old)), @bitCast(usize, @as(isize, new))); 51 } else { 52 if (old == new) { 53 if (std.debug.runtime_safety) { 54 const rc = syscall2(SYS_fcntl, @bitCast(usize, @as(isize, old)), F_GETFD); 55 if (@bitCast(isize, rc) < 0) return rc; 56 } 57 return @intCast(usize, old); 58 } else { 59 return syscall3(SYS_dup3, @bitCast(usize, @as(isize, old)), @bitCast(usize, @as(isize, new)), 0); 60 } 61 } 62 } 63 64 pub fn dup3(old: i32, new: i32, flags: u32) usize { 65 return syscall3(SYS_dup3, @bitCast(usize, @as(isize, old)), @bitCast(usize, @as(isize, new)), flags); 66 } 67 68 // TODO https://github.com/ziglang/zig/issues/265 69 pub fn chdir(path: [*]const u8) usize { 70 return syscall1(SYS_chdir, @ptrToInt(path)); 71 } 72 73 // TODO https://github.com/ziglang/zig/issues/265 74 pub fn chroot(path: [*]const u8) usize { 75 return syscall1(SYS_chroot, @ptrToInt(path)); 76 } 77 78 // TODO https://github.com/ziglang/zig/issues/265 79 pub fn execve(path: [*]const u8, argv: [*]const ?[*]const u8, envp: [*]const ?[*]const u8) usize { 80 return syscall3(SYS_execve, @ptrToInt(path), @ptrToInt(argv), @ptrToInt(envp)); 81 } 82 83 pub fn fork() usize { 84 if (@hasDecl(@This(), "SYS_fork")) { 85 return syscall0(SYS_fork); 86 } else { 87 return syscall2(SYS_clone, SIGCHLD, 0); 88 } 89 } 90 91 /// This must be inline, and inline call the syscall function, because if the 92 /// child does a return it will clobber the parent's stack. 93 /// It is advised to avoid this function and use clone instead, because 94 /// the compiler is not aware of how vfork affects control flow and you may 95 /// see different results in optimized builds. 96 pub inline fn vfork() usize { 97 return @call(.{ .modifier = .always_inline }, syscall0, .{SYS_vfork}); 98 } 99 100 pub fn futimens(fd: i32, times: *const [2]timespec) usize { 101 return utimensat(fd, null, times, 0); 102 } 103 104 // TODO https://github.com/ziglang/zig/issues/265 105 pub fn utimensat(dirfd: i32, path: ?[*]const u8, times: *const [2]timespec, flags: u32) usize { 106 return syscall4(SYS_utimensat, @bitCast(usize, @as(isize, dirfd)), @ptrToInt(path), @ptrToInt(times), flags); 107 } 108 109 pub fn futex_wait(uaddr: *const i32, futex_op: u32, val: i32, timeout: ?*timespec) usize { 110 return syscall4(SYS_futex, @ptrToInt(uaddr), futex_op, @bitCast(u32, val), @ptrToInt(timeout)); 111 } 112 113 pub fn futex_wake(uaddr: *const i32, futex_op: u32, val: i32) usize { 114 return syscall3(SYS_futex, @ptrToInt(uaddr), futex_op, @bitCast(u32, val)); 115 } 116 117 pub fn getcwd(buf: [*]u8, size: usize) usize { 118 return syscall2(SYS_getcwd, @ptrToInt(buf), size); 119 } 120 121 pub fn getdents(fd: i32, dirp: [*]u8, len: usize) usize { 122 return syscall3( 123 SYS_getdents, 124 @bitCast(usize, @as(isize, fd)), 125 @ptrToInt(dirp), 126 std.math.min(len, maxInt(c_int)), 127 ); 128 } 129 130 pub fn getdents64(fd: i32, dirp: [*]u8, len: usize) usize { 131 return syscall3( 132 SYS_getdents64, 133 @bitCast(usize, @as(isize, fd)), 134 @ptrToInt(dirp), 135 std.math.min(len, maxInt(c_int)), 136 ); 137 } 138 139 pub fn inotify_init1(flags: u32) usize { 140 return syscall1(SYS_inotify_init1, flags); 141 } 142 143 pub fn inotify_add_watch(fd: i32, pathname: [*]const u8, mask: u32) usize { 144 return syscall3(SYS_inotify_add_watch, @bitCast(usize, @as(isize, fd)), @ptrToInt(pathname), mask); 145 } 146 147 pub fn inotify_rm_watch(fd: i32, wd: i32) usize { 148 return syscall2(SYS_inotify_rm_watch, @bitCast(usize, @as(isize, fd)), @bitCast(usize, @as(isize, wd))); 149 } 150 151 // TODO https://github.com/ziglang/zig/issues/265 152 pub fn readlink(noalias path: [*]const u8, noalias buf_ptr: [*]u8, buf_len: usize) usize { 153 if (@hasDecl(@This(), "SYS_readlink")) { 154 return syscall3(SYS_readlink, @ptrToInt(path), @ptrToInt(buf_ptr), buf_len); 155 } else { 156 return syscall4(SYS_readlinkat, @bitCast(usize, @as(isize, AT_FDCWD)), @ptrToInt(path), @ptrToInt(buf_ptr), buf_len); 157 } 158 } 159 160 // TODO https://github.com/ziglang/zig/issues/265 161 pub fn readlinkat(dirfd: i32, noalias path: [*]const u8, noalias buf_ptr: [*]u8, buf_len: usize) usize { 162 return syscall4(SYS_readlinkat, @bitCast(usize, @as(isize, dirfd)), @ptrToInt(path), @ptrToInt(buf_ptr), buf_len); 163 } 164 165 // TODO https://github.com/ziglang/zig/issues/265 166 pub fn mkdir(path: [*]const u8, mode: u32) usize { 167 if (@hasDecl(@This(), "SYS_mkdir")) { 168 return syscall2(SYS_mkdir, @ptrToInt(path), mode); 169 } else { 170 return syscall3(SYS_mkdirat, @bitCast(usize, @as(isize, AT_FDCWD)), @ptrToInt(path), mode); 171 } 172 } 173 174 // TODO https://github.com/ziglang/zig/issues/265 175 pub fn mkdirat(dirfd: i32, path: [*]const u8, mode: u32) usize { 176 return syscall3(SYS_mkdirat, @bitCast(usize, @as(isize, dirfd)), @ptrToInt(path), mode); 177 } 178 179 // TODO https://github.com/ziglang/zig/issues/265 180 pub fn mount(special: [*]const u8, dir: [*]const u8, fstype: [*]const u8, flags: u32, data: usize) usize { 181 return syscall5(SYS_mount, @ptrToInt(special), @ptrToInt(dir), @ptrToInt(fstype), flags, data); 182 } 183 184 // TODO https://github.com/ziglang/zig/issues/265 185 pub fn umount(special: [*]const u8) usize { 186 return syscall2(SYS_umount2, @ptrToInt(special), 0); 187 } 188 189 // TODO https://github.com/ziglang/zig/issues/265 190 pub fn umount2(special: [*]const u8, flags: u32) usize { 191 return syscall2(SYS_umount2, @ptrToInt(special), flags); 192 } 193 194 pub fn mmap(address: ?[*]u8, length: usize, prot: usize, flags: u32, fd: i32, offset: u64) usize { 195 if (@hasDecl(@This(), "SYS_mmap2")) { 196 // Make sure the offset is also specified in multiples of page size 197 if ((offset & (MMAP2_UNIT - 1)) != 0) 198 return @bitCast(usize, @as(isize, -EINVAL)); 199 200 return syscall6( 201 SYS_mmap2, 202 @ptrToInt(address), 203 length, 204 prot, 205 flags, 206 @bitCast(usize, @as(isize, fd)), 207 @truncate(usize, offset / MMAP2_UNIT), 208 ); 209 } else { 210 return syscall6( 211 SYS_mmap, 212 @ptrToInt(address), 213 length, 214 prot, 215 flags, 216 @bitCast(usize, @as(isize, fd)), 217 offset, 218 ); 219 } 220 } 221 222 pub fn mprotect(address: [*]const u8, length: usize, protection: usize) usize { 223 return syscall3(SYS_mprotect, @ptrToInt(address), length, protection); 224 } 225 226 pub fn munmap(address: [*]const u8, length: usize) usize { 227 return syscall2(SYS_munmap, @ptrToInt(address), length); 228 } 229 230 pub fn poll(fds: [*]pollfd, n: nfds_t, timeout: i32) usize { 231 if (@hasDecl(@This(), "SYS_poll")) { 232 return syscall3(SYS_poll, @ptrToInt(fds), n, @bitCast(u32, timeout)); 233 } else { 234 return syscall6( 235 SYS_ppoll, 236 @ptrToInt(fds), 237 n, 238 @ptrToInt(if (timeout >= 0) 239 ×pec{ 240 .tv_sec = @divTrunc(timeout, 1000), 241 .tv_nsec = @rem(timeout, 1000) * 1000000, 242 } 243 else 244 null), 245 0, 246 0, 247 NSIG / 8, 248 ); 249 } 250 } 251 252 pub fn read(fd: i32, buf: [*]u8, count: usize) usize { 253 return syscall3(SYS_read, @bitCast(usize, @as(isize, fd)), @ptrToInt(buf), count); 254 } 255 256 pub fn preadv(fd: i32, iov: [*]const iovec, count: usize, offset: u64) usize { 257 return syscall5( 258 SYS_preadv, 259 @bitCast(usize, @as(isize, fd)), 260 @ptrToInt(iov), 261 count, 262 @truncate(usize, offset), 263 @truncate(usize, offset >> 32), 264 ); 265 } 266 267 pub fn preadv2(fd: i32, iov: [*]const iovec, count: usize, offset: u64, flags: kernel_rwf) usize { 268 return syscall6( 269 SYS_preadv2, 270 @bitCast(usize, @as(isize, fd)), 271 @ptrToInt(iov), 272 count, 273 @truncate(usize, offset), 274 @truncate(usize, offset >> 32), 275 flags, 276 ); 277 } 278 279 pub fn readv(fd: i32, iov: [*]const iovec, count: usize) usize { 280 return syscall3(SYS_readv, @bitCast(usize, @as(isize, fd)), @ptrToInt(iov), count); 281 } 282 283 pub fn writev(fd: i32, iov: [*]const iovec_const, count: usize) usize { 284 return syscall3(SYS_writev, @bitCast(usize, @as(isize, fd)), @ptrToInt(iov), count); 285 } 286 287 pub fn pwritev(fd: i32, iov: [*]const iovec_const, count: usize, offset: u64) usize { 288 return syscall5( 289 SYS_pwritev, 290 @bitCast(usize, @as(isize, fd)), 291 @ptrToInt(iov), 292 count, 293 @truncate(usize, offset), 294 @truncate(usize, offset >> 32), 295 ); 296 } 297 298 pub fn pwritev2(fd: i32, iov: [*]const iovec_const, count: usize, offset: u64, flags: kernel_rwf) usize { 299 return syscall6( 300 SYS_pwritev2, 301 @bitCast(usize, @as(isize, fd)), 302 @ptrToInt(iov), 303 count, 304 @truncate(usize, offset), 305 @truncate(usize, offset >> 32), 306 flags, 307 ); 308 } 309 310 // TODO https://github.com/ziglang/zig/issues/265 311 pub fn rmdir(path: [*]const u8) usize { 312 if (@hasDecl(@This(), "SYS_rmdir")) { 313 return syscall1(SYS_rmdir, @ptrToInt(path)); 314 } else { 315 return syscall3(SYS_unlinkat, @bitCast(usize, @as(isize, AT_FDCWD)), @ptrToInt(path), AT_REMOVEDIR); 316 } 317 } 318 319 // TODO https://github.com/ziglang/zig/issues/265 320 pub fn symlink(existing: [*]const u8, new: [*]const u8) usize { 321 if (@hasDecl(@This(), "SYS_symlink")) { 322 return syscall2(SYS_symlink, @ptrToInt(existing), @ptrToInt(new)); 323 } else { 324 return syscall3(SYS_symlinkat, @ptrToInt(existing), @bitCast(usize, @as(isize, AT_FDCWD)), @ptrToInt(new)); 325 } 326 } 327 328 // TODO https://github.com/ziglang/zig/issues/265 329 pub fn symlinkat(existing: [*]const u8, newfd: i32, newpath: [*]const u8) usize { 330 return syscall3(SYS_symlinkat, @ptrToInt(existing), @bitCast(usize, @as(isize, newfd)), @ptrToInt(newpath)); 331 } 332 333 // TODO https://github.com/ziglang/zig/issues/265 334 pub fn pread(fd: i32, buf: [*]u8, count: usize, offset: usize) usize { 335 return syscall4(SYS_pread, @bitCast(usize, @as(isize, fd)), @ptrToInt(buf), count, offset); 336 } 337 338 // TODO https://github.com/ziglang/zig/issues/265 339 pub fn access(path: [*]const u8, mode: u32) usize { 340 if (@hasDecl(@This(), "SYS_access")) { 341 return syscall2(SYS_access, @ptrToInt(path), mode); 342 } else { 343 return syscall4(SYS_faccessat, @bitCast(usize, @as(isize, AT_FDCWD)), @ptrToInt(path), mode, 0); 344 } 345 } 346 347 // TODO https://github.com/ziglang/zig/issues/265 348 pub fn faccessat(dirfd: i32, path: [*]const u8, mode: u32, flags: u32) usize { 349 return syscall4(SYS_faccessat, @bitCast(usize, @as(isize, dirfd)), @ptrToInt(path), mode, flags); 350 } 351 352 pub fn pipe(fd: *[2]i32) usize { 353 if (builtin.arch == .mipsel) { 354 return syscall_pipe(fd); 355 } else if (@hasDecl(@This(), "SYS_pipe")) { 356 return syscall1(SYS_pipe, @ptrToInt(fd)); 357 } else { 358 return syscall2(SYS_pipe2, @ptrToInt(fd), 0); 359 } 360 } 361 362 pub fn pipe2(fd: *[2]i32, flags: u32) usize { 363 return syscall2(SYS_pipe2, @ptrToInt(fd), flags); 364 } 365 366 pub fn write(fd: i32, buf: [*]const u8, count: usize) usize { 367 return syscall3(SYS_write, @bitCast(usize, @as(isize, fd)), @ptrToInt(buf), count); 368 } 369 370 pub fn pwrite(fd: i32, buf: [*]const u8, count: usize, offset: usize) usize { 371 return syscall4(SYS_pwrite, @bitCast(usize, @as(isize, fd)), @ptrToInt(buf), count, offset); 372 } 373 374 // TODO https://github.com/ziglang/zig/issues/265 375 pub fn rename(old: [*]const u8, new: [*]const u8) usize { 376 if (@hasDecl(@This(), "SYS_rename")) { 377 return syscall2(SYS_rename, @ptrToInt(old), @ptrToInt(new)); 378 } else if (@hasDecl(@This(), "SYS_renameat")) { 379 return syscall4(SYS_renameat, @bitCast(usize, @as(isize, AT_FDCWD)), @ptrToInt(old), @bitCast(usize, @as(isize, AT_FDCWD)), @ptrToInt(new)); 380 } else { 381 return syscall5(SYS_renameat2, @bitCast(usize, @as(isize, AT_FDCWD)), @ptrToInt(old), @bitCast(usize, @as(isize, AT_FDCWD)), @ptrToInt(new), 0); 382 } 383 } 384 385 pub fn renameat(oldfd: i32, oldpath: [*]const u8, newfd: i32, newpath: [*]const u8) usize { 386 if (@hasDecl(@This(), "SYS_renameat")) { 387 return syscall4( 388 SYS_renameat, 389 @bitCast(usize, @as(isize, oldfd)), 390 @ptrToInt(old), 391 @bitCast(usize, @as(isize, newfd)), 392 @ptrToInt(new), 393 ); 394 } else { 395 return syscall5( 396 SYS_renameat2, 397 @bitCast(usize, @as(isize, oldfd)), 398 @ptrToInt(old), 399 @bitCast(usize, @as(isize, newfd)), 400 @ptrToInt(new), 401 0, 402 ); 403 } 404 } 405 406 // TODO https://github.com/ziglang/zig/issues/265 407 pub fn renameat2(oldfd: i32, oldpath: [*]const u8, newfd: i32, newpath: [*]const u8, flags: u32) usize { 408 return syscall5( 409 SYS_renameat2, 410 @bitCast(usize, @as(isize, oldfd)), 411 @ptrToInt(oldpath), 412 @bitCast(usize, @as(isize, newfd)), 413 @ptrToInt(newpath), 414 flags, 415 ); 416 } 417 418 // TODO https://github.com/ziglang/zig/issues/265 419 pub fn open(path: [*]const u8, flags: u32, perm: usize) usize { 420 if (@hasDecl(@This(), "SYS_open")) { 421 return syscall3(SYS_open, @ptrToInt(path), flags, perm); 422 } else { 423 return syscall4( 424 SYS_openat, 425 @bitCast(usize, @as(isize, AT_FDCWD)), 426 @ptrToInt(path), 427 flags, 428 perm, 429 ); 430 } 431 } 432 433 // TODO https://github.com/ziglang/zig/issues/265 434 pub fn create(path: [*]const u8, perm: usize) usize { 435 return syscall2(SYS_creat, @ptrToInt(path), perm); 436 } 437 438 // TODO https://github.com/ziglang/zig/issues/265 439 pub fn openat(dirfd: i32, path: [*]const u8, flags: u32, mode: usize) usize { 440 // dirfd could be negative, for example AT_FDCWD is -100 441 return syscall4(SYS_openat, @bitCast(usize, @as(isize, dirfd)), @ptrToInt(path), flags, mode); 442 } 443 444 /// See also `clone` (from the arch-specific include) 445 pub fn clone5(flags: usize, child_stack_ptr: usize, parent_tid: *i32, child_tid: *i32, newtls: usize) usize { 446 return syscall5(SYS_clone, flags, child_stack_ptr, @ptrToInt(parent_tid), @ptrToInt(child_tid), newtls); 447 } 448 449 /// See also `clone` (from the arch-specific include) 450 pub fn clone2(flags: u32, child_stack_ptr: usize) usize { 451 return syscall2(SYS_clone, flags, child_stack_ptr); 452 } 453 454 pub fn close(fd: i32) usize { 455 return syscall1(SYS_close, @bitCast(usize, @as(isize, fd))); 456 } 457 458 /// Can only be called on 32 bit systems. For 64 bit see `lseek`. 459 pub fn llseek(fd: i32, offset: u64, result: ?*u64, whence: usize) usize { 460 return syscall5( 461 SYS__llseek, 462 @bitCast(usize, @as(isize, fd)), 463 @truncate(usize, offset >> 32), 464 @truncate(usize, offset), 465 @ptrToInt(result), 466 whence, 467 ); 468 } 469 470 /// Can only be called on 64 bit systems. For 32 bit see `llseek`. 471 pub fn lseek(fd: i32, offset: i64, whence: usize) usize { 472 return syscall3(SYS_lseek, @bitCast(usize, @as(isize, fd)), @bitCast(usize, offset), whence); 473 } 474 475 pub fn exit(status: i32) noreturn { 476 _ = syscall1(SYS_exit, @bitCast(usize, @as(isize, status))); 477 unreachable; 478 } 479 480 pub fn exit_group(status: i32) noreturn { 481 _ = syscall1(SYS_exit_group, @bitCast(usize, @as(isize, status))); 482 unreachable; 483 } 484 485 pub fn getrandom(buf: [*]u8, count: usize, flags: u32) usize { 486 return syscall3(SYS_getrandom, @ptrToInt(buf), count, flags); 487 } 488 489 pub fn kill(pid: i32, sig: i32) usize { 490 return syscall2(SYS_kill, @bitCast(usize, @as(isize, pid)), @bitCast(usize, @as(isize, sig))); 491 } 492 493 // TODO https://github.com/ziglang/zig/issues/265 494 pub fn unlink(path: [*]const u8) usize { 495 if (@hasDecl(@This(), "SYS_unlink")) { 496 return syscall1(SYS_unlink, @ptrToInt(path)); 497 } else { 498 return syscall3(SYS_unlinkat, @bitCast(usize, @as(isize, AT_FDCWD)), @ptrToInt(path), 0); 499 } 500 } 501 502 // TODO https://github.com/ziglang/zig/issues/265 503 pub fn unlinkat(dirfd: i32, path: [*]const u8, flags: u32) usize { 504 return syscall3(SYS_unlinkat, @bitCast(usize, @as(isize, dirfd)), @ptrToInt(path), flags); 505 } 506 507 pub fn waitpid(pid: i32, status: *u32, flags: u32) usize { 508 return syscall4(SYS_wait4, @bitCast(usize, @as(isize, pid)), @ptrToInt(status), flags, 0); 509 } 510 511 var vdso_clock_gettime = @ptrCast(?*const c_void, init_vdso_clock_gettime); 512 513 // We must follow the C calling convention when we call into the VDSO 514 const vdso_clock_gettime_ty = extern fn (i32, *timespec) usize; 515 516 pub fn clock_gettime(clk_id: i32, tp: *timespec) usize { 517 if (@hasDecl(@This(), "VDSO_CGT_SYM")) { 518 const ptr = @atomicLoad(?*const c_void, &vdso_clock_gettime, .Unordered); 519 if (ptr) |fn_ptr| { 520 const f = @ptrCast(vdso_clock_gettime_ty, fn_ptr); 521 const rc = f(clk_id, tp); 522 switch (rc) { 523 0, @bitCast(usize, @as(isize, -EINVAL)) => return rc, 524 else => {}, 525 } 526 } 527 } 528 return syscall2(SYS_clock_gettime, @bitCast(usize, @as(isize, clk_id)), @ptrToInt(tp)); 529 } 530 531 extern fn init_vdso_clock_gettime(clk: i32, ts: *timespec) usize { 532 const ptr = @intToPtr(?*const c_void, vdso.lookup(VDSO_CGT_VER, VDSO_CGT_SYM)); 533 // Note that we may not have a VDSO at all, update the stub address anyway 534 // so that clock_gettime will fall back on the good old (and slow) syscall 535 @atomicStore(?*const c_void, &vdso_clock_gettime, ptr, .Monotonic); 536 // Call into the VDSO if available 537 if (ptr) |fn_ptr| { 538 const f = @ptrCast(vdso_clock_gettime_ty, fn_ptr); 539 return f(clk, ts); 540 } 541 return @bitCast(usize, @as(isize, -ENOSYS)); 542 } 543 544 pub fn clock_getres(clk_id: i32, tp: *timespec) usize { 545 return syscall2(SYS_clock_getres, @bitCast(usize, @as(isize, clk_id)), @ptrToInt(tp)); 546 } 547 548 pub fn clock_settime(clk_id: i32, tp: *const timespec) usize { 549 return syscall2(SYS_clock_settime, @bitCast(usize, @as(isize, clk_id)), @ptrToInt(tp)); 550 } 551 552 pub fn gettimeofday(tv: *timeval, tz: *timezone) usize { 553 return syscall2(SYS_gettimeofday, @ptrToInt(tv), @ptrToInt(tz)); 554 } 555 556 pub fn settimeofday(tv: *const timeval, tz: *const timezone) usize { 557 return syscall2(SYS_settimeofday, @ptrToInt(tv), @ptrToInt(tz)); 558 } 559 560 pub fn nanosleep(req: *const timespec, rem: ?*timespec) usize { 561 return syscall2(SYS_nanosleep, @ptrToInt(req), @ptrToInt(rem)); 562 } 563 564 pub fn setuid(uid: u32) usize { 565 if (@hasDecl(@This(), "SYS_setuid32")) { 566 return syscall1(SYS_setuid32, uid); 567 } else { 568 return syscall1(SYS_setuid, uid); 569 } 570 } 571 572 pub fn setgid(gid: u32) usize { 573 if (@hasDecl(@This(), "SYS_setgid32")) { 574 return syscall1(SYS_setgid32, gid); 575 } else { 576 return syscall1(SYS_setgid, gid); 577 } 578 } 579 580 pub fn setreuid(ruid: u32, euid: u32) usize { 581 if (@hasDecl(@This(), "SYS_setreuid32")) { 582 return syscall2(SYS_setreuid32, ruid, euid); 583 } else { 584 return syscall2(SYS_setreuid, ruid, euid); 585 } 586 } 587 588 pub fn setregid(rgid: u32, egid: u32) usize { 589 if (@hasDecl(@This(), "SYS_setregid32")) { 590 return syscall2(SYS_setregid32, rgid, egid); 591 } else { 592 return syscall2(SYS_setregid, rgid, egid); 593 } 594 } 595 596 pub fn getuid() u32 { 597 if (@hasDecl(@This(), "SYS_getuid32")) { 598 return @as(u32, syscall0(SYS_getuid32)); 599 } else { 600 return @as(u32, syscall0(SYS_getuid)); 601 } 602 } 603 604 pub fn getgid() u32 { 605 if (@hasDecl(@This(), "SYS_getgid32")) { 606 return @as(u32, syscall0(SYS_getgid32)); 607 } else { 608 return @as(u32, syscall0(SYS_getgid)); 609 } 610 } 611 612 pub fn geteuid() u32 { 613 if (@hasDecl(@This(), "SYS_geteuid32")) { 614 return @as(u32, syscall0(SYS_geteuid32)); 615 } else { 616 return @as(u32, syscall0(SYS_geteuid)); 617 } 618 } 619 620 pub fn getegid() u32 { 621 if (@hasDecl(@This(), "SYS_getegid32")) { 622 return @as(u32, syscall0(SYS_getegid32)); 623 } else { 624 return @as(u32, syscall0(SYS_getegid)); 625 } 626 } 627 628 pub fn seteuid(euid: u32) usize { 629 return setreuid(std.math.maxInt(u32), euid); 630 } 631 632 pub fn setegid(egid: u32) usize { 633 return setregid(std.math.maxInt(u32), egid); 634 } 635 636 pub fn getresuid(ruid: *u32, euid: *u32, suid: *u32) usize { 637 if (@hasDecl(@This(), "SYS_getresuid32")) { 638 return syscall3(SYS_getresuid32, @ptrToInt(ruid), @ptrToInt(euid), @ptrToInt(suid)); 639 } else { 640 return syscall3(SYS_getresuid, @ptrToInt(ruid), @ptrToInt(euid), @ptrToInt(suid)); 641 } 642 } 643 644 pub fn getresgid(rgid: *u32, egid: *u32, sgid: *u32) usize { 645 if (@hasDecl(@This(), "SYS_getresgid32")) { 646 return syscall3(SYS_getresgid32, @ptrToInt(rgid), @ptrToInt(egid), @ptrToInt(sgid)); 647 } else { 648 return syscall3(SYS_getresgid, @ptrToInt(rgid), @ptrToInt(egid), @ptrToInt(sgid)); 649 } 650 } 651 652 pub fn setresuid(ruid: u32, euid: u32, suid: u32) usize { 653 if (@hasDecl(@This(), "SYS_setresuid32")) { 654 return syscall3(SYS_setresuid32, ruid, euid, suid); 655 } else { 656 return syscall3(SYS_setresuid, ruid, euid, suid); 657 } 658 } 659 660 pub fn setresgid(rgid: u32, egid: u32, sgid: u32) usize { 661 if (@hasDecl(@This(), "SYS_setresgid32")) { 662 return syscall3(SYS_setresgid32, rgid, egid, sgid); 663 } else { 664 return syscall3(SYS_setresgid, rgid, egid, sgid); 665 } 666 } 667 668 pub fn getgroups(size: usize, list: *u32) usize { 669 if (@hasDecl(@This(), "SYS_getgroups32")) { 670 return syscall2(SYS_getgroups32, size, @ptrToInt(list)); 671 } else { 672 return syscall2(SYS_getgroups, size, @ptrToInt(list)); 673 } 674 } 675 676 pub fn setgroups(size: usize, list: *const u32) usize { 677 if (@hasDecl(@This(), "SYS_setgroups32")) { 678 return syscall2(SYS_setgroups32, size, @ptrToInt(list)); 679 } else { 680 return syscall2(SYS_setgroups, size, @ptrToInt(list)); 681 } 682 } 683 684 pub fn getpid() i32 { 685 return @bitCast(i32, @truncate(u32, syscall0(SYS_getpid))); 686 } 687 688 pub fn gettid() i32 { 689 return @bitCast(i32, @truncate(u32, syscall0(SYS_gettid))); 690 } 691 692 pub fn sigprocmask(flags: u32, noalias set: *const sigset_t, noalias oldset: ?*sigset_t) usize { 693 return syscall4(SYS_rt_sigprocmask, flags, @ptrToInt(set), @ptrToInt(oldset), NSIG / 8); 694 } 695 696 pub fn sigaction(sig: u6, noalias act: *const Sigaction, noalias oact: ?*Sigaction) usize { 697 assert(sig >= 1); 698 assert(sig != SIGKILL); 699 assert(sig != SIGSTOP); 700 701 const restorer_fn = if ((act.flags & SA_SIGINFO) != 0) restore_rt else restore; 702 var ksa = k_sigaction{ 703 .sigaction = act.sigaction, 704 .flags = act.flags | SA_RESTORER, 705 .mask = undefined, 706 .restorer = @ptrCast(extern fn () void, restorer_fn), 707 }; 708 var ksa_old: k_sigaction = undefined; 709 const ksa_mask_size = @sizeOf(@TypeOf(ksa_old.mask)); 710 @memcpy(@ptrCast([*]u8, &ksa.mask), @ptrCast([*]const u8, &act.mask), ksa_mask_size); 711 const result = syscall4(SYS_rt_sigaction, sig, @ptrToInt(&ksa), @ptrToInt(&ksa_old), ksa_mask_size); 712 const err = getErrno(result); 713 if (err != 0) { 714 return result; 715 } 716 if (oact) |old| { 717 old.sigaction = ksa_old.sigaction; 718 old.flags = @truncate(u32, ksa_old.flags); 719 @memcpy(@ptrCast([*]u8, &old.mask), @ptrCast([*]const u8, &ksa_old.mask), ksa_mask_size); 720 } 721 return 0; 722 } 723 724 pub fn blockAllSignals(set: *sigset_t) void { 725 _ = syscall4(SYS_rt_sigprocmask, SIG_BLOCK, @ptrToInt(&all_mask), @ptrToInt(set), NSIG / 8); 726 } 727 728 pub fn blockAppSignals(set: *sigset_t) void { 729 _ = syscall4(SYS_rt_sigprocmask, SIG_BLOCK, @ptrToInt(&app_mask), @ptrToInt(set), NSIG / 8); 730 } 731 732 pub fn restoreSignals(set: *sigset_t) void { 733 _ = syscall4(SYS_rt_sigprocmask, SIG_SETMASK, @ptrToInt(set), 0, NSIG / 8); 734 } 735 736 pub fn sigaddset(set: *sigset_t, sig: u6) void { 737 const s = sig - 1; 738 (set.*)[@intCast(usize, s) / usize.bit_count] |= @intCast(usize, 1) << (s & (usize.bit_count - 1)); 739 } 740 741 pub fn sigismember(set: *const sigset_t, sig: u6) bool { 742 const s = sig - 1; 743 return ((set.*)[@intCast(usize, s) / usize.bit_count] & (@intCast(usize, 1) << (s & (usize.bit_count - 1)))) != 0; 744 } 745 746 pub fn getsockname(fd: i32, noalias addr: *sockaddr, noalias len: *socklen_t) usize { 747 if (builtin.arch == .i386) { 748 return socketcall(SC_getsockname, &[3]usize{ @bitCast(usize, @as(isize, fd)), @ptrToInt(addr), @ptrToInt(len) }); 749 } 750 return syscall3(SYS_getsockname, @bitCast(usize, @as(isize, fd)), @ptrToInt(addr), @ptrToInt(len)); 751 } 752 753 pub fn getpeername(fd: i32, noalias addr: *sockaddr, noalias len: *socklen_t) usize { 754 if (builtin.arch == .i386) { 755 return socketcall(SC_getpeername, &[3]usize{ @bitCast(usize, @as(isize, fd)), @ptrToInt(addr), @ptrToInt(len) }); 756 } 757 return syscall3(SYS_getpeername, @bitCast(usize, @as(isize, fd)), @ptrToInt(addr), @ptrToInt(len)); 758 } 759 760 pub fn socket(domain: u32, socket_type: u32, protocol: u32) usize { 761 if (builtin.arch == .i386) { 762 return socketcall(SC_socket, &[3]usize{ domain, socket_type, protocol }); 763 } 764 return syscall3(SYS_socket, domain, socket_type, protocol); 765 } 766 767 pub fn setsockopt(fd: i32, level: u32, optname: u32, optval: [*]const u8, optlen: socklen_t) usize { 768 if (builtin.arch == .i386) { 769 return socketcall(SC_setsockopt, &[5]usize{ @bitCast(usize, @as(isize, fd)), level, optname, @ptrToInt(optval), @intCast(usize, optlen) }); 770 } 771 return syscall5(SYS_setsockopt, @bitCast(usize, @as(isize, fd)), level, optname, @ptrToInt(optval), @intCast(usize, optlen)); 772 } 773 774 pub fn getsockopt(fd: i32, level: u32, optname: u32, noalias optval: [*]u8, noalias optlen: *socklen_t) usize { 775 if (builtin.arch == .i386) { 776 return socketcall(SC_getsockopt, &[5]usize{ @bitCast(usize, @as(isize, fd)), level, optname, @ptrToInt(optval), @ptrToInt(optlen) }); 777 } 778 return syscall5(SYS_getsockopt, @bitCast(usize, @as(isize, fd)), level, optname, @ptrToInt(optval), @ptrToInt(optlen)); 779 } 780 781 pub fn sendmsg(fd: i32, msg: *msghdr_const, flags: u32) usize { 782 if (builtin.arch == .i386) { 783 return socketcall(SC_sendmsg, &[3]usize{ @bitCast(usize, @as(isize, fd)), @ptrToInt(msg), flags }); 784 } 785 return syscall3(SYS_sendmsg, @bitCast(usize, @as(isize, fd)), @ptrToInt(msg), flags); 786 } 787 788 pub fn sendmmsg(fd: i32, msgvec: [*]mmsghdr_const, vlen: u32, flags: u32) usize { 789 if (@typeInfo(usize).Int.bits > @typeInfo(@TypeOf(mmsghdr(undefined).msg_len)).Int.bits) { 790 // workaround kernel brokenness: 791 // if adding up all iov_len overflows a i32 then split into multiple calls 792 // see https://www.openwall.com/lists/musl/2014/06/07/5 793 const kvlen = if (vlen > IOV_MAX) IOV_MAX else vlen; // matches kernel 794 var next_unsent: usize = 0; 795 for (msgvec[0..kvlen]) |*msg, i| { 796 var size: i32 = 0; 797 const msg_iovlen = @intCast(usize, msg.msg_hdr.msg_iovlen); // kernel side this is treated as unsigned 798 for (msg.msg_hdr.msg_iov[0..msg_iovlen]) |iov, j| { 799 if (iov.iov_len > std.math.maxInt(i32) or @addWithOverflow(i32, size, @intCast(i32, iov.iov_len), &size)) { 800 // batch-send all messages up to the current message 801 if (next_unsent < i) { 802 const batch_size = i - next_unsent; 803 const r = syscall4(SYS_sendmmsg, @bitCast(usize, @as(isize, fd)), @ptrToInt(&msgvec[next_unsent]), batch_size, flags); 804 if (getErrno(r) != 0) return next_unsent; 805 if (r < batch_size) return next_unsent + r; 806 } 807 // send current message as own packet 808 const r = sendmsg(fd, &msg.msg_hdr, flags); 809 if (getErrno(r) != 0) return r; 810 // Linux limits the total bytes sent by sendmsg to INT_MAX, so this cast is safe. 811 msg.msg_len = @intCast(u32, r); 812 next_unsent = i + 1; 813 break; 814 } 815 } 816 } 817 if (next_unsent < kvlen or next_unsent == 0) { // want to make sure at least one syscall occurs (e.g. to trigger MSG_EOR) 818 const batch_size = kvlen - next_unsent; 819 const r = syscall4(SYS_sendmmsg, @bitCast(usize, @as(isize, fd)), @ptrToInt(&msgvec[next_unsent]), batch_size, flags); 820 if (getErrno(r) != 0) return r; 821 return next_unsent + r; 822 } 823 return kvlen; 824 } 825 return syscall4(SYS_sendmmsg, @bitCast(usize, @as(isize, fd)), @ptrToInt(msgvec), vlen, flags); 826 } 827 828 pub fn connect(fd: i32, addr: *const c_void, len: socklen_t) usize { 829 if (builtin.arch == .i386) { 830 return socketcall(SC_connect, &[3]usize{ @bitCast(usize, @as(isize, fd)), @ptrToInt(addr), len }); 831 } 832 return syscall3(SYS_connect, @bitCast(usize, @as(isize, fd)), @ptrToInt(addr), len); 833 } 834 835 pub fn recvmsg(fd: i32, msg: *msghdr, flags: u32) usize { 836 if (builtin.arch == .i386) { 837 return socketcall(SC_recvmsg, &[3]usize{ @bitCast(usize, @as(isize, fd)), @ptrToInt(msg), flags }); 838 } 839 return syscall3(SYS_recvmsg, @bitCast(usize, @as(isize, fd)), @ptrToInt(msg), flags); 840 } 841 842 pub fn recvfrom(fd: i32, noalias buf: [*]u8, len: usize, flags: u32, noalias addr: ?*sockaddr, noalias alen: ?*socklen_t) usize { 843 if (builtin.arch == .i386) { 844 return socketcall(SC_recvfrom, &[6]usize{ @bitCast(usize, @as(isize, fd)), @ptrToInt(buf), len, flags, @ptrToInt(addr), @ptrToInt(alen) }); 845 } 846 return syscall6(SYS_recvfrom, @bitCast(usize, @as(isize, fd)), @ptrToInt(buf), len, flags, @ptrToInt(addr), @ptrToInt(alen)); 847 } 848 849 pub fn shutdown(fd: i32, how: i32) usize { 850 if (builtin.arch == .i386) { 851 return socketcall(SC_shutdown, &[2]usize{ @bitCast(usize, @as(isize, fd)), @bitCast(usize, @as(isize, how)) }); 852 } 853 return syscall2(SYS_shutdown, @bitCast(usize, @as(isize, fd)), @bitCast(usize, @as(isize, how))); 854 } 855 856 pub fn bind(fd: i32, addr: *const sockaddr, len: socklen_t) usize { 857 if (builtin.arch == .i386) { 858 return socketcall(SC_bind, &[3]usize{ @bitCast(usize, @as(isize, fd)), @ptrToInt(addr), @intCast(usize, len) }); 859 } 860 return syscall3(SYS_bind, @bitCast(usize, @as(isize, fd)), @ptrToInt(addr), @intCast(usize, len)); 861 } 862 863 pub fn listen(fd: i32, backlog: u32) usize { 864 if (builtin.arch == .i386) { 865 return socketcall(SC_listen, &[2]usize{ @bitCast(usize, @as(isize, fd)), backlog }); 866 } 867 return syscall2(SYS_listen, @bitCast(usize, @as(isize, fd)), backlog); 868 } 869 870 pub fn sendto(fd: i32, buf: [*]const u8, len: usize, flags: u32, addr: ?*const sockaddr, alen: socklen_t) usize { 871 if (builtin.arch == .i386) { 872 return socketcall(SC_sendto, &[6]usize{ @bitCast(usize, @as(isize, fd)), @ptrToInt(buf), len, flags, @ptrToInt(addr), @intCast(usize, alen) }); 873 } 874 return syscall6(SYS_sendto, @bitCast(usize, @as(isize, fd)), @ptrToInt(buf), len, flags, @ptrToInt(addr), @intCast(usize, alen)); 875 } 876 877 pub fn socketpair(domain: i32, socket_type: i32, protocol: i32, fd: [2]i32) usize { 878 if (builtin.arch == .i386) { 879 return socketcall(SC_socketpair, &[4]usize{ @intCast(usize, domain), @intCast(usize, socket_type), @intCast(usize, protocol), @ptrToInt(&fd[0]) }); 880 } 881 return syscall4(SYS_socketpair, @intCast(usize, domain), @intCast(usize, socket_type), @intCast(usize, protocol), @ptrToInt(&fd[0])); 882 } 883 884 pub fn accept(fd: i32, noalias addr: *sockaddr, noalias len: *socklen_t) usize { 885 if (builtin.arch == .i386) { 886 return socketcall(SC_accept, &[4]usize{ fd, addr, len, 0 }); 887 } 888 return accept4(fd, addr, len, 0); 889 } 890 891 pub fn accept4(fd: i32, noalias addr: *sockaddr, noalias len: *socklen_t, flags: u32) usize { 892 if (builtin.arch == .i386) { 893 return socketcall(SC_accept4, &[4]usize{ @bitCast(usize, @as(isize, fd)), @ptrToInt(addr), @ptrToInt(len), flags }); 894 } 895 return syscall4(SYS_accept4, @bitCast(usize, @as(isize, fd)), @ptrToInt(addr), @ptrToInt(len), flags); 896 } 897 898 pub fn fstat(fd: i32, stat_buf: *Stat) usize { 899 if (@hasDecl(@This(), "SYS_fstat64")) { 900 return syscall2(SYS_fstat64, @bitCast(usize, @as(isize, fd)), @ptrToInt(stat_buf)); 901 } else { 902 return syscall2(SYS_fstat, @bitCast(usize, @as(isize, fd)), @ptrToInt(stat_buf)); 903 } 904 } 905 906 // TODO https://github.com/ziglang/zig/issues/265 907 pub fn stat(pathname: [*]const u8, statbuf: *Stat) usize { 908 if (@hasDecl(@This(), "SYS_stat64")) { 909 return syscall2(SYS_stat64, @ptrToInt(pathname), @ptrToInt(statbuf)); 910 } else { 911 return syscall2(SYS_stat, @ptrToInt(pathname), @ptrToInt(statbuf)); 912 } 913 } 914 915 // TODO https://github.com/ziglang/zig/issues/265 916 pub fn lstat(pathname: [*]const u8, statbuf: *Stat) usize { 917 if (@hasDecl(@This(), "SYS_lstat64")) { 918 return syscall2(SYS_lstat64, @ptrToInt(pathname), @ptrToInt(statbuf)); 919 } else { 920 return syscall2(SYS_lstat, @ptrToInt(pathname), @ptrToInt(statbuf)); 921 } 922 } 923 924 // TODO https://github.com/ziglang/zig/issues/265 925 pub fn fstatat(dirfd: i32, path: [*]const u8, stat_buf: *Stat, flags: u32) usize { 926 if (@hasDecl(@This(), "SYS_fstatat64")) { 927 return syscall4(SYS_fstatat64, @bitCast(usize, @as(isize, dirfd)), @ptrToInt(path), @ptrToInt(stat_buf), flags); 928 } else { 929 return syscall4(SYS_fstatat, @bitCast(usize, @as(isize, dirfd)), @ptrToInt(path), @ptrToInt(stat_buf), flags); 930 } 931 } 932 933 pub fn statx(dirfd: i32, path: [*]const u8, flags: u32, mask: u32, statx_buf: *Statx) usize { 934 if (@hasDecl(@This(), "SYS_statx")) { 935 return syscall5( 936 SYS_statx, 937 @bitCast(usize, @as(isize, dirfd)), 938 @ptrToInt(path), 939 flags, 940 mask, 941 @ptrToInt(statx_buf), 942 ); 943 } 944 return @bitCast(usize, @as(isize, -ENOSYS)); 945 } 946 947 // TODO https://github.com/ziglang/zig/issues/265 948 pub fn listxattr(path: [*]const u8, list: [*]u8, size: usize) usize { 949 return syscall3(SYS_listxattr, @ptrToInt(path), @ptrToInt(list), size); 950 } 951 952 // TODO https://github.com/ziglang/zig/issues/265 953 pub fn llistxattr(path: [*]const u8, list: [*]u8, size: usize) usize { 954 return syscall3(SYS_llistxattr, @ptrToInt(path), @ptrToInt(list), size); 955 } 956 957 pub fn flistxattr(fd: usize, list: [*]u8, size: usize) usize { 958 return syscall3(SYS_flistxattr, fd, @ptrToInt(list), size); 959 } 960 961 // TODO https://github.com/ziglang/zig/issues/265 962 pub fn getxattr(path: [*]const u8, name: [*]const u8, value: [*]u8, size: usize) usize { 963 return syscall4(SYS_getxattr, @ptrToInt(path), @ptrToInt(name), @ptrToInt(value), size); 964 } 965 966 // TODO https://github.com/ziglang/zig/issues/265 967 pub fn lgetxattr(path: [*]const u8, name: [*]const u8, value: [*]u8, size: usize) usize { 968 return syscall4(SYS_lgetxattr, @ptrToInt(path), @ptrToInt(name), @ptrToInt(value), size); 969 } 970 971 // TODO https://github.com/ziglang/zig/issues/265 972 pub fn fgetxattr(fd: usize, name: [*]const u8, value: [*]u8, size: usize) usize { 973 return syscall4(SYS_lgetxattr, fd, @ptrToInt(name), @ptrToInt(value), size); 974 } 975 976 // TODO https://github.com/ziglang/zig/issues/265 977 pub fn setxattr(path: [*]const u8, name: [*]const u8, value: *const void, size: usize, flags: usize) usize { 978 return syscall5(SYS_setxattr, @ptrToInt(path), @ptrToInt(name), @ptrToInt(value), size, flags); 979 } 980 981 // TODO https://github.com/ziglang/zig/issues/265 982 pub fn lsetxattr(path: [*]const u8, name: [*]const u8, value: *const void, size: usize, flags: usize) usize { 983 return syscall5(SYS_lsetxattr, @ptrToInt(path), @ptrToInt(name), @ptrToInt(value), size, flags); 984 } 985 986 // TODO https://github.com/ziglang/zig/issues/265 987 pub fn fsetxattr(fd: usize, name: [*]const u8, value: *const void, size: usize, flags: usize) usize { 988 return syscall5(SYS_fsetxattr, fd, @ptrToInt(name), @ptrToInt(value), size, flags); 989 } 990 991 // TODO https://github.com/ziglang/zig/issues/265 992 pub fn removexattr(path: [*]const u8, name: [*]const u8) usize { 993 return syscall2(SYS_removexattr, @ptrToInt(path), @ptrToInt(name)); 994 } 995 996 // TODO https://github.com/ziglang/zig/issues/265 997 pub fn lremovexattr(path: [*]const u8, name: [*]const u8) usize { 998 return syscall2(SYS_lremovexattr, @ptrToInt(path), @ptrToInt(name)); 999 } 1000 1001 // TODO https://github.com/ziglang/zig/issues/265 1002 pub fn fremovexattr(fd: usize, name: [*]const u8) usize { 1003 return syscall2(SYS_fremovexattr, fd, @ptrToInt(name)); 1004 } 1005 1006 pub fn sched_yield() usize { 1007 return syscall0(SYS_sched_yield); 1008 } 1009 1010 pub fn sched_getaffinity(pid: i32, size: usize, set: *cpu_set_t) usize { 1011 const rc = syscall3(SYS_sched_getaffinity, @bitCast(usize, @as(isize, pid)), size, @ptrToInt(set)); 1012 if (@bitCast(isize, rc) < 0) return rc; 1013 if (rc < size) @memset(@ptrCast([*]u8, set) + rc, 0, size - rc); 1014 return 0; 1015 } 1016 1017 pub fn epoll_create() usize { 1018 return epoll_create1(0); 1019 } 1020 1021 pub fn epoll_create1(flags: usize) usize { 1022 return syscall1(SYS_epoll_create1, flags); 1023 } 1024 1025 pub fn epoll_ctl(epoll_fd: i32, op: u32, fd: i32, ev: ?*epoll_event) usize { 1026 return syscall4(SYS_epoll_ctl, @bitCast(usize, @as(isize, epoll_fd)), @intCast(usize, op), @bitCast(usize, @as(isize, fd)), @ptrToInt(ev)); 1027 } 1028 1029 pub fn epoll_wait(epoll_fd: i32, events: [*]epoll_event, maxevents: u32, timeout: i32) usize { 1030 return epoll_pwait(epoll_fd, events, maxevents, timeout, null); 1031 } 1032 1033 pub fn epoll_pwait(epoll_fd: i32, events: [*]epoll_event, maxevents: u32, timeout: i32, sigmask: ?*sigset_t) usize { 1034 return syscall6( 1035 SYS_epoll_pwait, 1036 @bitCast(usize, @as(isize, epoll_fd)), 1037 @ptrToInt(events), 1038 @intCast(usize, maxevents), 1039 @bitCast(usize, @as(isize, timeout)), 1040 @ptrToInt(sigmask), 1041 @sizeOf(sigset_t), 1042 ); 1043 } 1044 1045 pub fn eventfd(count: u32, flags: u32) usize { 1046 return syscall2(SYS_eventfd2, count, flags); 1047 } 1048 1049 pub fn timerfd_create(clockid: i32, flags: u32) usize { 1050 return syscall2(SYS_timerfd_create, @bitCast(usize, @as(isize, clockid)), flags); 1051 } 1052 1053 pub const itimerspec = extern struct { 1054 it_interval: timespec, 1055 it_value: timespec, 1056 }; 1057 1058 pub fn timerfd_gettime(fd: i32, curr_value: *itimerspec) usize { 1059 return syscall2(SYS_timerfd_gettime, @bitCast(usize, @as(isize, fd)), @ptrToInt(curr_value)); 1060 } 1061 1062 pub fn timerfd_settime(fd: i32, flags: u32, new_value: *const itimerspec, old_value: ?*itimerspec) usize { 1063 return syscall4(SYS_timerfd_settime, @bitCast(usize, @as(isize, fd)), flags, @ptrToInt(new_value), @ptrToInt(old_value)); 1064 } 1065 1066 pub fn unshare(flags: usize) usize { 1067 return syscall1(SYS_unshare, flags); 1068 } 1069 1070 pub fn capget(hdrp: *cap_user_header_t, datap: *cap_user_data_t) usize { 1071 return syscall2(SYS_capget, @ptrToInt(hdrp), @ptrToInt(datap)); 1072 } 1073 1074 pub fn capset(hdrp: *cap_user_header_t, datap: *const cap_user_data_t) usize { 1075 return syscall2(SYS_capset, @ptrToInt(hdrp), @ptrToInt(datap)); 1076 } 1077 1078 pub fn sigaltstack(ss: ?*stack_t, old_ss: ?*stack_t) usize { 1079 return syscall2(SYS_sigaltstack, @ptrToInt(ss), @ptrToInt(old_ss)); 1080 } 1081 1082 pub fn uname(uts: *utsname) usize { 1083 return syscall1(SYS_uname, @ptrToInt(uts)); 1084 } 1085 1086 // XXX: This should be weak 1087 extern const __ehdr_start: elf.Ehdr = undefined; 1088 1089 pub fn dl_iterate_phdr(comptime T: type, callback: extern fn (info: *dl_phdr_info, size: usize, data: ?*T) i32, data: ?*T) isize { 1090 if (builtin.link_libc) { 1091 return std.c.dl_iterate_phdr(@ptrCast(std.c.dl_iterate_phdr_callback, callback), @ptrCast(?*c_void, data)); 1092 } 1093 1094 const elf_base = @ptrToInt(&__ehdr_start); 1095 const n_phdr = __ehdr_start.e_phnum; 1096 const phdrs = (@intToPtr([*]elf.Phdr, elf_base + __ehdr_start.e_phoff))[0..n_phdr]; 1097 1098 var it = dl.linkmap_iterator(phdrs) catch return 0; 1099 1100 // The executable has no dynamic link segment, create a single entry for 1101 // the whole ELF image 1102 if (it.end()) { 1103 var info = dl_phdr_info{ 1104 .dlpi_addr = elf_base, 1105 .dlpi_name = "/proc/self/exe", 1106 .dlpi_phdr = @intToPtr([*]elf.Phdr, elf_base + __ehdr_start.e_phoff), 1107 .dlpi_phnum = __ehdr_start.e_phnum, 1108 }; 1109 1110 return callback(&info, @sizeOf(dl_phdr_info), data); 1111 } 1112 1113 // Last return value from the callback function 1114 var last_r: isize = 0; 1115 while (it.next()) |entry| { 1116 var dlpi_phdr: usize = undefined; 1117 var dlpi_phnum: u16 = undefined; 1118 1119 if (entry.l_addr != 0) { 1120 const elf_header = @intToPtr(*elf.Ehdr, entry.l_addr); 1121 dlpi_phdr = entry.l_addr + elf_header.e_phoff; 1122 dlpi_phnum = elf_header.e_phnum; 1123 } else { 1124 // This is the running ELF image 1125 dlpi_phdr = elf_base + __ehdr_start.e_phoff; 1126 dlpi_phnum = __ehdr_start.e_phnum; 1127 } 1128 1129 var info = dl_phdr_info{ 1130 .dlpi_addr = entry.l_addr, 1131 .dlpi_name = entry.l_name, 1132 .dlpi_phdr = @intToPtr([*]elf.Phdr, dlpi_phdr), 1133 .dlpi_phnum = dlpi_phnum, 1134 }; 1135 1136 last_r = callback(&info, @sizeOf(dl_phdr_info), data); 1137 if (last_r != 0) break; 1138 } 1139 1140 return last_r; 1141 } 1142 1143 pub fn io_uring_setup(entries: u32, p: *io_uring_params) usize { 1144 return syscall2(SYS_io_uring_setup, entries, @ptrToInt(p)); 1145 } 1146 1147 pub fn io_uring_enter(fd: i32, to_submit: u32, min_complete: u32, flags: u32, sig: ?*sigset_t) usize { 1148 return syscall6(SYS_io_uring_enter, @bitCast(usize, @as(isize, fd)), to_submit, min_complete, flags, @ptrToInt(sig), NSIG / 8); 1149 } 1150 1151 pub fn io_uring_register(fd: i32, opcode: u32, arg: ?*const c_void, nr_args: u32) usize { 1152 return syscall4(SYS_io_uring_register, @bitCast(usize, @as(isize, fd)), opcode, @ptrToInt(arg), nr_args); 1153 } 1154 1155 test "" { 1156 if (builtin.os == .linux) { 1157 _ = @import("linux/test.zig"); 1158 } 1159 }