| /* Set flags signalling availability of kernel features based on given |
| kernel version number. |
| Copyright (C) 1999, 2000, 2001 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| /* This file must not contain any C code. At least it must be protected |
| to allow using the file also in assembler files. */ |
| |
| #ifndef __LINUX_KERNEL_VERSION |
| /* We assume the worst; all kernels should be supported. */ |
| # define __LINUX_KERNEL_VERSION 0 |
| #endif |
| |
| /* 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 |
| |
| /* 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 |
| |
| /* 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 these are in 2.3.35 on powerpc. */ |
| #if __LINUX_KERNEL_VERSION >= 131875 && defined __powerpc__ |
| # define __ASSUME_TRUNCATE64_SYSCALL 1 |
| # define __ASSUME_STAT64_SYSCALL 1 |
| # define __ASSUME_NEW_GETRLIMIT_SYSCALL 1 |
| #endif |
| |
| /* Linux 2.3.39 introduced 32bit UID/GIDs and IPC64. Some platforms had 32 |
| bit type all along. */ |
| #if __LINUX_KERNEL_VERSION >= 131879 || defined __powerpc__ || defined __mips__ |
| # define __ASSUME_32BITUIDS 1 |
| # ifndef __powerpc__ |
| # define __ASSUME_IPC64 1 |
| # endif |
| # ifdef __sparc__ |
| # define __ASSUME_SETRESUID_SYSCALL 1 |
| # endif |
| #endif |
| |
| /* Linux 2.4.0 on PPC introduced a correct IPC64. */ |
| #if __LINUX_KERNEL_VERSION >= 132096 && defined __powerpc__ |
| # 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 |
| |
| /* 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. */ |
| #if __LINUX_KERNEL_VERSION >= 132097 |
| # 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 |
| |
| /* 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). */ |
| #if __LINUX_KERNEL_VERSION >= 132100 \ |
| && (defined __arm__ || defined __powerpc__ || defined __sh__) |
| # 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 2.4.5 kernels PPC passes the AUXV in the standard way |
| and the mmap2 syscall made it into the official kernel. */ |
| #if __LINUX_KERNEL_VERSION >= (132096+5) && defined __powerpc__ |
| # define __ASSUME_STD_AUXV 1 |
| # define __ASSUME_MMAP2_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 |
