mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-05 21:00:05 +00:00
330fad2970
* sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_SETRESUID_SYSCALL): On the sparc, define to 1, not empty. 2002-09-29 Jakub Jelinek <jakub@redhat.com>
230 lines
8.0 KiB
C
230 lines
8.0 KiB
C
/* Set flags signalling availability of kernel features based on given
|
|
kernel version number.
|
|
Copyright (C) 1999, 2000, 2001, 2002 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 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
|
|
|
|
/* 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
|
|
|
|
/* 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
|
|
|
|
/* 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). 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. */
|
|
#if __LINUX_KERNEL_VERSION >= (132096+5) && defined __powerpc__
|
|
# define __ASSUME_STD_AUXV 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
|
|
|
|
/* 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 2.3.31. */
|
|
#if __LINUX_KERNEL_VERSION >= 132384 && defined __i386__
|
|
# define __ASSUME_SET_THREAD_AREA_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
|