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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 | /* Set flags signalling availability of kernel features based on given kernel version number. Copyright (C) 1999-2003, 2004, 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ /* This file must not contain any C code. At least it must be protected to allow using the file also in assembler files. */ #if defined __mips__ # include <sgidefs.h> #endif #include <linux/version.h> #define __LINUX_KERNEL_VERSION LINUX_VERSION_CODE /* We assume for __LINUX_KERNEL_VERSION the same encoding used in linux/version.h. I.e., the major, minor, and subminor all get a byte with the major number being in the highest byte. This means we can do numeric comparisons. In the following we will define certain symbols depending on whether the describes kernel feature is available in the kernel version given by __LINUX_KERNEL_VERSION. We are not always exactly recording the correct versions in which the features were introduced. If somebody cares these values can afterwards be corrected. Most of the numbers here are set corresponding to 2.2.0. */ /* `getcwd' system call. */ #if __LINUX_KERNEL_VERSION >= 131584 # define __ASSUME_GETCWD_SYSCALL 1 #endif /* When was `poll' introduced? */ #if __LINUX_KERNEL_VERSION >= 131584 # define __ASSUME_POLL_SYSCALL 1 #endif /* Real-time signal became usable in 2.1.70. */ #if __LINUX_KERNEL_VERSION >= 131398 # define __ASSUME_REALTIME_SIGNALS 1 #endif /* When were the `pread'/`pwrite' syscalls introduced? */ #if __LINUX_KERNEL_VERSION >= 131584 # define __ASSUME_PREAD_SYSCALL 1 # define __ASSUME_PWRITE_SYSCALL 1 #endif /* When was `poll' introduced? */ #if __LINUX_KERNEL_VERSION >= 131584 # define __ASSUME_POLL_SYSCALL 1 #endif /* The `lchown' syscall was introduced in 2.1.80. */ #if __LINUX_KERNEL_VERSION >= 131408 # define __ASSUME_LCHOWN_SYSCALL 1 #endif /* When did the `setresuid' sysall became available? */ #if __LINUX_KERNEL_VERSION >= 131584 && !defined __sparc__ # define __ASSUME_SETRESUID_SYSCALL 1 #endif /* The SIOCGIFNAME ioctl is available starting with 2.1.50. */ #if __LINUX_KERNEL_VERSION >= 131408 # define __ASSUME_SIOCGIFNAME 1 #endif /* MSG_NOSIGNAL was at least available with Linux 2.2.0. */ #if __LINUX_KERNEL_VERSION >= 131584 # define __ASSUME_MSG_NOSIGNAL 1 #endif /* On x86 another `getrlimit' syscall was added in 2.3.25. */ #if __LINUX_KERNEL_VERSION >= 131865 && defined __i386__ # define __ASSUME_NEW_GETRLIMIT_SYSCALL 1 #endif /* On x86 the truncate64/ftruncate64 syscalls were introduced in 2.3.31. */ #if __LINUX_KERNEL_VERSION >= 131871 && defined __i386__ # define __ASSUME_TRUNCATE64_SYSCALL 1 #endif /* On x86 the mmap2 syscall was introduced in 2.3.31. */ #if __LINUX_KERNEL_VERSION >= 131871 && defined __i386__ # define __ASSUME_MMAP2_SYSCALL 1 #endif /* On x86 the stat64/lstat64/fstat64 syscalls were introduced in 2.3.34. */ #if __LINUX_KERNEL_VERSION >= 131874 && defined __i386__ # define __ASSUME_STAT64_SYSCALL 1 #endif /* On sparc and ARM the truncate64/ftruncate64/mmap2/stat64/lstat64/fstat64 syscalls were introduced in 2.3.35. */ #if __LINUX_KERNEL_VERSION >= 131875 && (defined __sparc__ || defined __arm__) # define __ASSUME_TRUNCATE64_SYSCALL 1 # define __ASSUME_MMAP2_SYSCALL 1 # define __ASSUME_STAT64_SYSCALL 1 #endif /* I know for sure that getrlimit are in 2.3.35 on powerpc. */ #if __LINUX_KERNEL_VERSION >= 131875 && defined __powerpc__ # define __ASSUME_NEW_GETRLIMIT_SYSCALL 1 #endif /* I know for sure that these are in 2.3.35 on powerpc. But PowerPC64 does not support separate 64-bit syscalls, already 64-bit */ #if __LINUX_KERNEL_VERSION >= 131875 && defined __powerpc__ \ && !defined __powerpc64__ # define __ASSUME_TRUNCATE64_SYSCALL 1 # define __ASSUME_STAT64_SYSCALL 1 #endif /* Linux 2.3.39 introduced 32bit UID/GIDs. Some platforms had 32 bit type all along. */ #if __LINUX_KERNEL_VERSION >= 131879 || defined __powerpc__ || defined __mips__ # define __ASSUME_32BITUIDS 1 #endif /* Linux 2.3.39 sparc added setresuid. */ #if __LINUX_KERNEL_VERSION >= 131879 && defined __sparc__ # define __ASSUME_SETRESUID_SYSCALL 1 #endif #if __LINUX_KERNEL_VERSION >= 131879 # define __ASSUME_SETRESGID_SYSCALL 1 #endif /* Linux 2.3.39 introduced IPC64. Except for powerpc. */ #if __LINUX_KERNEL_VERSION >= 131879 && !defined __powerpc__ # define __ASSUME_IPC64 1 #endif /* MIPS platforms had IPC64 all along. */ #if defined __mips__ # define __ASSUME_IPC64 1 #endif /* We can use the LDTs for threading with Linux 2.3.99 and newer. */ #if __LINUX_KERNEL_VERSION >= 131939 # define __ASSUME_LDT_WORKS 1 #endif /* Linux 2.4.0 on PPC introduced a correct IPC64. But PowerPC64 does not support a separate 64-bit sys call, already 64-bit */ #if __LINUX_KERNEL_VERSION >= 132096 && defined __powerpc__ \ && !defined __powerpc64__ # define __ASSUME_IPC64 1 #endif /* SH kernels got stat64, mmap2, and truncate64 during 2.4.0-test. */ #if __LINUX_KERNEL_VERSION >= 132096 && defined __sh__ # define __ASSUME_TRUNCATE64_SYSCALL 1 # define __ASSUME_MMAP2_SYSCALL 1 # define __ASSUME_STAT64_SYSCALL 1 #endif /* The changed st_ino field appeared in 2.4.0-test6. But we cannot distinguish this version from other 2.4.0 releases. Therefore play save and assume it available is for 2.4.1 and up. However, SH is lame, and still does not have a 64-bit inode field. */ #if __LINUX_KERNEL_VERSION >= 132097 && !defined __alpha__ && !defined __sh__ # define __ASSUME_ST_INO_64_BIT 1 #endif /* To support locking of large files a new fcntl() syscall was introduced in 2.4.0-test7. We test for 2.4.1 for the earliest version we know the syscall is available. */ #if __LINUX_KERNEL_VERSION >= 132097 && (defined __i386__ || defined __sparc__) # define __ASSUME_FCNTL64 1 #endif /* The AT_CLKTCK auxiliary vector entry was introduction in the 2.4.0 series. */ #if __LINUX_KERNEL_VERSION >= 132097 # define __ASSUME_AT_CLKTCK 1 #endif /* Arm got fcntl64 in 2.4.4, PowerPC and SH have it also in 2.4.4 (I don't know when it got introduced). But PowerPC64 does not support separate FCNTL64 call, FCNTL is already 64-bit */ #if __LINUX_KERNEL_VERSION >= 132100 \ && (defined __arm__ || defined __powerpc__ || defined __sh__) \ && !defined __powerpc64__ # define __ASSUME_FCNTL64 1 #endif /* The getdents64 syscall was introduced in 2.4.0-test7. We test for 2.4.1 for the earliest version we know the syscall is available. */ #if __LINUX_KERNEL_VERSION >= 132097 # define __ASSUME_GETDENTS64_SYSCALL 1 #endif /* When did O_DIRECTORY became available? Early in 2.3 but when? Be safe, use 2.3.99. */ #if __LINUX_KERNEL_VERSION >= 131939 # define __ASSUME_O_DIRECTORY 1 #endif /* Starting with one of the 2.4.0 pre-releases the Linux kernel passes up the page size information. */ #if __LINUX_KERNEL_VERSION >= 132097 # define __ASSUME_AT_PAGESIZE 1 #endif /* Starting with at least 2.4.0 the kernel passes the uid/gid unconditionally up to the child. */ #if __LINUX_KERNEL_VERSION >= 132097 # define __ASSUME_AT_XID 1 #endif /* Starting with 2.4.5 kernels PPC passes the AUXV in the standard way and the vfork syscall made it into the official kernel. */ #if __LINUX_KERNEL_VERSION >= (132096+5) && defined __powerpc__ # define __ASSUME_STD_AUXV 1 # define __ASSUME_VFORK_SYSCALL 1 #endif /* Starting with 2.4.5 kernels the mmap2 syscall made it into the official kernel. But PowerPC64 does not support a separate MMAP2 call. */ #if __LINUX_KERNEL_VERSION >= (132096+5) && defined __powerpc__ \ && !defined __powerpc64__ # define __ASSUME_MMAP2_SYSCALL 1 #endif /* Starting with 2.4.21 PowerPC implements the new prctl syscall. This allows applications to get/set the Floating Point Exception Mode. */ #if __LINUX_KERNEL_VERSION >= (132096+21) && defined __powerpc__ # define __ASSUME_NEW_PRCTL_SYSCALL 1 #endif /* Starting with 2.4.21 the PowerPC32 clone syscall works as expected. */ #if __LINUX_KERNEL_VERSION >= (132096+21) && defined __powerpc__ \ && !defined __powerpc64__ # define __ASSUME_FIXED_CLONE_SYSCALL 1 #endif /* Starting with 2.4.21 PowerPC64 implements the new rt_sigreturn syscall. The new rt_sigreturn takes an ucontext pointer allowing rt_sigreturn to be used in the set/swapcontext implementation. */ #if __LINUX_KERNEL_VERSION >= (132096+21) && defined __powerpc64__ # define __ASSUME_NEW_RT_SIGRETURN_SYSCALL 1 #endif /* On x86, the set_thread_area syscall was introduced in 2.5.29, but its semantics was changed in 2.5.30, and again after 2.5.31. */ #if __LINUX_KERNEL_VERSION >= 132384 && defined __i386__ # define __ASSUME_SET_THREAD_AREA_SYSCALL 1 #endif /* The vfork syscall on x86 and arm was definitely available in 2.4. */ #if __LINUX_KERNEL_VERSION >= 132097 && (defined __i386__ || defined __arm__) # define __ASSUME_VFORK_SYSCALL 1 #endif /* There are an infinite number of PA-RISC kernel versions numbered 2.4.0. But they've not really been released as such. We require and expect the final version here. */ #ifdef __hppa__ # define __ASSUME_32BITUIDS 1 # define __ASSUME_TRUNCATE64_SYSCALL 1 # define __ASSUME_MMAP2_SYSCALL 1 # define __ASSUME_STAT64_SYSCALL 1 # define __ASSUME_IPC64 1 # define __ASSUME_ST_INO_64_BIT 1 # define __ASSUME_FCNTL64 1 # define __ASSUME_GETDENTS64_SYSCALL 1 #endif /* Alpha switched to a 64-bit timeval sometime before 2.2.0. */ #if __LINUX_KERNEL_VERSION >= 131584 && defined __alpha__ # define __ASSUME_TIMEVAL64 1 #endif #if defined __mips__ && _MIPS_SIM == _ABIN32 # define __ASSUME_FCNTL64 1 #endif /* The late 2.5 kernels saw a lot of new CLONE_* flags. Summarize their availability with one define. The changes were made first for i386 and the have to be done separately for the other archs. For i386 we pick 2.5.50 as the first version with support. */ #if __LINUX_KERNEL_VERSION >= 132402 && defined __i386__ # define __ASSUME_CLONE_THREAD_FLAGS 1 #endif /* Support for various CLOEXEC and NONBLOCK flags was added for x86, x86-64, PPC, IA-64, SPARC< and S390 in 2.6.23. */ #if __LINUX_KERNEL_VERSION >= 0x020617 \ && (defined __i386__ || defined __x86_64__ || defined __powerpc__ \ || defined __ia64__ || defined __sparc__ || defined __s390__) # define __ASSUME_O_CLOEXEC 1 #endif /* Support for various CLOEXEC and NONBLOCK flags was added for x86, * x86-64, PPC, IA-64, and SPARC in 2.6.27. */ #if (__LINUX_KERNEL_VERSION >= 0x02061b \ && (defined __i386__ || defined __x86_64__ || defined __powerpc__ \ || defined __ia64__ || defined __sparc__ || defined __s390__) \ ) || (__LINUX_KERNEL_VERSION >= 0x020621 && defined __alpha__) \ || defined __aarch64__ || defined __tile__ /* # define __ASSUME_SOCK_CLOEXEC 1 */ /* # define __ASSUME_IN_NONBLOCK 1 */ # define __ASSUME_PIPE2 1 /* # define __ASSUME_EVENTFD2 1 */ /* # define __ASSUME_SIGNALFD4 1 */ /* # define __ASSUME_DUP3 1 */ #endif /* These features were surely available with 2.4.12. */ #if __LINUX_KERNEL_VERSION >= 132108 && defined __mc68000__ # define __ASSUME_MMAP2_SYSCALL 1 # define __ASSUME_TRUNCATE64_SYSCALL 1 # define __ASSUME_STAT64_SYSCALL 1 # define __ASSUME_FCNTL64 1 # define __ASSUME_VFORK_SYSCALL 1 #endif /* Beginning with 2.5.63 support for realtime and monotonic clocks and timers based on them is available. */ #if __LINUX_KERNEL_VERSION >= 132415 # define __ASSUME_POSIX_TIMERS 1 #endif /* Beginning with 2.6.12 the clock and timer supports CPU clocks. */ #if __LINUX_KERNEL_VERSION >= 0x2060c # define __ASSUME_POSIX_CPU_TIMERS 1 #endif /* The late 2.5 kernels saw a lot of new CLONE_* flags. Summarize their availability with one define. The changes were made first for i386 and the have to be done separately for the other archs. For ia64, s390*, PPC, x86-64 we pick 2.5.64 as the first version with support. */ #if __LINUX_KERNEL_VERSION >= 132416 \ && (defined __ia64__ || defined __s390__ || defined __powerpc__ \ || defined __x86_64__ || defined __sh__) # define __ASSUME_CLONE_THREAD_FLAGS 1 #endif /* With kernel 2.4.17 we always have netlink support. */ #if __LINUX_KERNEL_VERSION >= (132096+17) # define __ASSUME_NETLINK_SUPPORT 1 #endif /* The requeue futex functionality was introduced in 2.5.70. */ #if __LINUX_KERNEL_VERSION >= 132422 # define __ASSUME_FUTEX_REQUEUE 1 #endif /* The statfs64 syscalls are available in 2.5.74. */ #if __LINUX_KERNEL_VERSION >= 132426 # define __ASSUME_STATFS64 1 #endif /* Starting with at least 2.5.74 the kernel passes the setuid-like exec flag unconditionally up to the child. */ #if __LINUX_KERNEL_VERSION >= 132426 # define __ASSUME_AT_SECURE 1 #endif /* The utimes syscall has been available for some architectures forever. For x86 it was introduced after 2.5.75, for x86-64, ppc, and ppc64 it was introduced in 2.6.0-test3. */ #if defined __alpha__ || defined __ia64__ || defined __hppa__ \ || defined __sparc__ \ || (__LINUX_KERNEL_VERSION > 132427 && defined __i386__) \ || (__LINUX_KERNEL_VERSION > 132609 && defined __x86_64__) \ || (__LINUX_KERNEL_VERSION >= 132609 && defined __powerpc__) \ || (__LINUX_KERNEL_VERSION >= 132609 && defined __sh__) # define __ASSUME_UTIMES 1 #endif // XXX Disabled for now since the semantics we want is not achieved. #if 0 /* The CLONE_STOPPED flag was introduced in the 2.6.0-test1 series. */ #if __LINUX_KERNEL_VERSION >= 132609 # define __ASSUME_CLONE_STOPPED 1 #endif #endif /* The fixed version of the posix_fadvise64 syscall appeared in 2.6.0-test3. At least for x86. Powerpc support appeared in 2.6.2, but for 32-bit userspace only. */ #if (__LINUX_KERNEL_VERSION >= 132609 && defined __i386__) \ || (__LINUX_KERNEL_VERSION >= 132610 && defined __powerpc__ \ && !defined __powerpc64__) # define __ASSUME_FADVISE64_64_SYSCALL 1 #endif /* The PROT_GROWSDOWN/PROT_GROWSUP flags were introduced in the 2.6.0-test series. */ #if __LINUX_KERNEL_VERSION >= 132609 # define __ASSUME_PROT_GROWSUPDOWN 1 #endif /* Starting with 2.6.0 PowerPC adds signal/swapcontext support for Vector SIMD (AKA Altivec, VMX) instructions and register state. This changes the overall size of the sigcontext and adds the swapcontext syscall. */ #if __LINUX_KERNEL_VERSION >= 132608 && defined __powerpc__ # define __ASSUME_SWAPCONTEXT_SYSCALL 1 #endif /* The CLONE_DETACHED flag is not necessary in 2.6.2 kernels, it is implied. */ #if __LINUX_KERNEL_VERSION >= 132610 # define __ASSUME_NO_CLONE_DETACHED 1 #endif /* Starting with version 2.6.4-rc1 the getdents syscall returns d_type information as well and in between 2.6.5 and 2.6.8 most compat wrappers were fixed too. Except s390{,x} which was fixed in 2.6.11. */ #if (__LINUX_KERNEL_VERSION >= 0x020608 && !defined __s390__) \ || (__LINUX_KERNEL_VERSION >= 0x02060b && defined __s390__) # define __ASSUME_GETDENTS32_D_TYPE 1 #endif /* Starting with version 2.5.3, the initial location returned by `brk' after exec is always rounded up to the next page. */ #if __LINUX_KERNEL_VERSION >= 132355 # define __ASSUME_BRK_PAGE_ROUNDED 1 #endif /* Starting with version 2.6.9, the waitid system call is available. Except for powerpc and powerpc64, where it is available in 2.6.12. */ #if (__LINUX_KERNEL_VERSION >= 0x020609 && !defined __powerpc__) \ || (__LINUX_KERNEL_VERSION >= 0x02060c && defined __powerpc__) # define __ASSUME_WAITID_SYSCALL 1 #endif /* Starting with version 2.6.9, SSI_IEEE_RAISE_EXCEPTION exists. */ #if __LINUX_KERNEL_VERSION >= 0x020609 && defined __alpha__ #define __ASSUME_IEEE_RAISE_EXCEPTION 1 #endif /* Support for the accept4 syscall was added in 2.6.28. */ #if __LINUX_KERNEL_VERSION >= 0x02061c \ && (defined __i386__ || defined __x86_64__ || defined __powerpc__ \ || defined __sparc__ || defined __s390__) # define __ASSUME_ACCEPT4 1 #endif /* Support for the accept4 syscall for alpha was added after 2.6.33-rc1. */ #if __LINUX_KERNEL_VERSION >= 0x020621 && defined __alpha__ # define __ASSUME_ACCEPT4 1 #endif /* Support for the FUTEX_CLOCK_REALTIME flag was added in 2.6.29. */ #if __LINUX_KERNEL_VERSION >= 0x02061d # define __ASSUME_FUTEX_CLOCK_REALTIME 1 #endif /* Support for PI futexes was added in 2.6.18. */ #if __LINUX_KERNEL_VERSION >= 0x020612 # define __ASSUME_FUTEX_LOCK_PI 1 #endif /* Support for private futexes was added in 2.6.22. */ #if __LINUX_KERNEL_VERSION >= 0x020616 # define __ASSUME_PRIVATE_FUTEX 1 #endif /* Support for fallocate was added in 2.6.23, on s390 only after 2.6.23-rc1, on alpha only after 2.6.33-rc1. */ #if __LINUX_KERNEL_VERSION >= 0x020617 \ && (!defined __s390__ || __LINUX_KERNEL_VERSION >= 0x020618) \ && (!defined __alpha__ || __LINUX_KERNEL_VERSION >= 0x020621) # define __ASSUME_FALLOCATE 1 #endif /* getcpu is a syscall for x86-64 since 3.1. */ #if defined __x86_64__ && __LINUX_KERNEL_VERSION >= 0x030100 # define __ASSUME_GETCPU_SYSCALL 1 #endif /* getrandom syscall (widely) appeared around 4.0.0 */ #if __LINUX_KERNEL_VERSION >= 0x040000 # define __ASSUME_GETRANDOM_SYSCALL 1 #endif |