/* Set flags signalling availability of kernel features based on given
kernel version number.
- Copyright (C) 1999-2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+ Copyright (C) 1999-2017 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
/* The sendfile syscall was introduced in 2.2.0. */
#define __ASSUME_SENDFILE 1
-/* On x86 another `getrlimit' syscall was added in 2.3.25. */
-#ifdef __i386__
-# define __ASSUME_NEW_GETRLIMIT_SYSCALL 1
-#endif
-
-/* On x86 the truncate64/ftruncate64 syscalls were introduced in 2.3.31. */
-#ifdef __i386__
-# define __ASSUME_TRUNCATE64_SYSCALL 1
-#endif
-
-/* On x86 the mmap2 syscall was introduced in 2.3.31. */
-#ifdef __i386__
-# define __ASSUME_MMAP2_SYSCALL 1
-#endif
-
-/* On x86 the stat64/lstat64/fstat64 syscalls were introduced in 2.3.34. */
-#ifdef __i386__
-# define __ASSUME_STAT64_SYSCALL 1
-#endif
-
-/* On sparc the truncate64/ftruncate64/mmap2/stat64/lstat64/fstat64
- syscalls were introduced in 2.3.35. */
-#if defined __sparc__ && !defined __arch64__
-# 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. */
-#ifdef __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 defined __powerpc__ && !defined __powerpc64__
-# define __ASSUME_TRUNCATE64_SYSCALL 1
-# define __ASSUME_STAT64_SYSCALL 1
-#endif
-
-/* Linux 2.3.39 introduced IPC64. Except for powerpc. Linux 2.4.0 on
- PPC introduced a correct IPC64. But PowerPC64 does not support a
- separate 64-bit syscall, already 64-bit. */
-#ifndef __powerpc64__
-# define __ASSUME_IPC64 1
-#endif
+/* Some architectures use the socketcall multiplexer for some or all
+ socket-related operations instead of separate syscalls.
+ __ASSUME_SOCKETCALL is defined for such architectures. */
-/* SH kernels got stat64, mmap2, and truncate64 during 2.4.0-test. */
-#ifdef __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,
+/* The changed st_ino field appeared in 2.4.0-test6. However, SH is lame,
and still does not have a 64-bit inode field. */
-#if __LINUX_KERNEL_VERSION >= 132097 && !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 __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
-
-/* 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__
-# define __ASSUME_VFORK_SYSCALL 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.
- For s390*, SPARC, PPC, x86-64, and SH we pick 2.5.64 as the first
- version with support. */
-#if ((__LINUX_KERNEL_VERSION >= 132402 && defined __i386__) \
- || (__LINUX_KERNEL_VERSION >= 132416 \
- && (defined __s390__ || defined __sparc__ \
- || defined __powerpc__ || defined __x86_64__ || defined __sh__)))
-# define __ASSUME_CLONE_THREAD_FLAGS 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
-
-/* 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
-
-/* Starting with the 2.5.75 kernel the kernel fills in the correct value
- in the si_pid field passed as part of the siginfo_t struct to signal
- handlers. */
-#if __LINUX_KERNEL_VERSION >= 132427
-# define __ASSUME_CORRECT_SI_PID 1
-#endif
-
-/* The tgkill syscall was instroduced for i386 in 2.5.75. On x86-64,
- sparc, SH, ppc, and ppc64 it was introduced in 2.6.0-test3. */
-#if (__LINUX_KERNEL_VERSION >= 132427 && defined __i386__) \
- || (__LINUX_KERNEL_VERSION >= 132609 \
- && (defined __x86_64__ || defined __powerpc__ \
- || defined __sh__ || defined __sparc__))
-# define __ASSUME_TGKILL 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 __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 and sparc. Powerpc support appeared
- in 2.6.2, but for 32-bit userspace only. */
-#if (__LINUX_KERNEL_VERSION >= 132609 \
- && (defined __i386__ || defined __sparc__)) \
- || (__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
+#define __ASSUME_ST_INO_64_BIT 1
-/* Starting with version 2.6.9, the waitid system call is available.
- Except for powerpc{,64} and s390{,x}, where it is available in 2.6.12. */
-#if (__LINUX_KERNEL_VERSION >= 0x020609 \
- && !defined __powerpc__ && !defined __s390__) \
- || (__LINUX_KERNEL_VERSION >= 0x02060c \
- && (defined __powerpc__ || defined __s390__))
-# define __ASSUME_WAITID_SYSCALL 1
-#endif
+/* The statfs64 syscalls are available in 2.5.74 (but not for alpha). */
+#define __ASSUME_STATFS64 1
-/* On sparc64 stat64/lstat64/fstat64 syscalls were introduced in 2.6.12. */
-#if __LINUX_KERNEL_VERSION >= 0x02060c && defined __sparc__ \
- && defined __arch64__
-# define __ASSUME_STAT64_SYSCALL 1
-#endif
+/* pselect/ppoll were introduced just after 2.6.16-rc1. On x86_64 and
+ SH this appeared first in 2.6.19-rc1, on ia64 in 2.6.22-rc1. */
+#define __ASSUME_PSELECT 1
-/* Early kernel used "shm" as the filesystem name for the filesystem used
- for shm_open etc. Later it is "tmpfs". 2.4.20 is a safe bet for the
- cutover. */
-#if __LINUX_KERNEL_VERSION >= 0x02041a
-# define __ASSUME_TMPFS_NAME 1
-#endif
+/* The *at syscalls were introduced just after 2.6.16-rc1. On PPC
+ they were introduced in 2.6.17-rc1, on SH in 2.6.19-rc1. */
+#define __ASSUME_ATFCTS 1
-/* pselect/ppoll were introduced just after 2.6.16-rc1. Due to the way
- the kernel versions are advertised we can only rely on 2.6.17 to have
- the code. On x86_64 and SH this appeared first in 2.6.19-rc1,
- on ia64 in 2.6.22-rc1. */
-#if __LINUX_KERNEL_VERSION >= 0x020611 \
- && ((!defined __x86_64__ && !defined __sh__) \
- || (__LINUX_KERNEL_VERSION >= 0x020613 \
- && (defined __x86_64__ || defined __sh__)))
-# define __ASSUME_PSELECT 1
-# define __ASSUME_PPOLL 1
-#endif
-
-/* The *at syscalls were introduced just after 2.6.16-rc1. Due to the way the
- kernel versions are advertised we can only rely on 2.6.17 to have
- the code. On PPC they were introduced in 2.6.17-rc1,
- on SH in 2.6.19-rc1. */
-#if __LINUX_KERNEL_VERSION >= 0x020611 \
- && (!defined __sh__ || __LINUX_KERNEL_VERSION >= 0x020613)
-# define __ASSUME_ATFCTS 1
-#endif
-
-/* Support for inter-process robust mutexes was added in 2.6.17. */
-#if __LINUX_KERNEL_VERSION >= 0x020611 \
- && (!defined __sh__ || __LINUX_KERNEL_VERSION >= 0x020613)
-# define __ASSUME_SET_ROBUST_LIST 1
-#endif
-
-/* Pessimistically assume that 2.6.18 introduced real handling of
- large numbers of requests to readv and writev and that we don't
- need a fallback. It likely worked for much longer. */
-#if __LINUX_KERNEL_VERSION >= 0x020612
-# define __ASSUME_COMPLETE_READV_WRITEV 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 utimensat syscall was added in 2.6.22, on SH
- only after 2.6.22-rc1. */
-#if __LINUX_KERNEL_VERSION >= 0x020616 \
- && (!defined __sh__ || __LINUX_KERNEL_VERSION >= 0x020617)
-# define __ASSUME_UTIMENSAT 1
-#endif
+/* Support for inter-process robust mutexes was added in 2.6.17 (but
+ some architectures lack futex_atomic_cmpxchg_inatomic in some
+ configurations). */
+#define __ASSUME_SET_ROBUST_LIST 1
/* 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. */
-#if __LINUX_KERNEL_VERSION >= 0x020617 \
- && (!defined __s390__ || __LINUX_KERNEL_VERSION >= 0x020618)
-# define __ASSUME_FALLOCATE 1
-#endif
+#define __ASSUME_PRIVATE_FUTEX 1
-/* 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 __sparc__ || defined __s390__)
-# define __ASSUME_O_CLOEXEC 1
-#endif
-
-/* Support for ADJ_OFFSET_SS_READ was added in 2.6.24. */
-#if __LINUX_KERNEL_VERSION >= 0x020618
-# define __ASSUME_ADJ_OFFSET_SS_READ 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 __sparc__ || defined __s390__)
-# 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
-
-/* 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 various CLOEXEC and NONBLOCK flags was added in
+ 2.6.27. */
+#define __ASSUME_IN_NONBLOCK 1
/* 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 the AT_RANDOM auxiliary vector entry was added in 2.6.29. */
-#if __LINUX_KERNEL_VERSION >= 0x02061d
-# define __ASSUME_AT_RANDOM 1
-#endif
+#define __ASSUME_FUTEX_CLOCK_REALTIME 1
/* Support for preadv and pwritev was added in 2.6.30. */
-#if __LINUX_KERNEL_VERSION >= 0x02061e
-# define __ASSUME_PREADV 1
-# define __ASSUME_PWRITEV 1
-#endif
-
-/* Support for F_GETOWN_EX was introduced in 2.6.32. */
-#if __LINUX_KERNEL_VERSION >= 0x020620
-# define __ASSUME_F_GETOWN_EX 1
-#endif
-
-/* Support for the recvmmsg syscall was added in 2.6.33. */
-#if __LINUX_KERNEL_VERSION >= 0x020621
-# define __ASSUME_RECVMMSG 1
-#endif
-
-/* statfs fills in f_flags since 2.6.36. */
-#if __LINUX_KERNEL_VERSION >= 0x020624
-# define __ASSUME_STATFS_F_FLAGS 1
-#endif
-
-/* prlimit64 is available in 2.6.36. */
-#if __LINUX_KERNEL_VERSION >= 0x020624
-# define __ASSUME_PRLIMIT64 1
-#endif
-
-/* sendmmsg is available in 2.6.39. */
-#if __LINUX_KERNEL_VERSION >= 0x020627
-# define __ASSUME_SENDMMSG 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
+#define __ASSUME_PREADV 1
+#define __ASSUME_PWRITEV 1
+
+/* Support for sendmmsg functionality was added in 3.0. */
+#define __ASSUME_SENDMMSG 1
+
+/* On most architectures, most socket syscalls are supported for all
+ supported kernel versions, but on some socketcall architectures
+ separate syscalls were only added later. */
+#define __ASSUME_SENDMSG_SYSCALL 1
+#define __ASSUME_RECVMSG_SYSCALL 1
+#define __ASSUME_ACCEPT_SYSCALL 1
+#define __ASSUME_CONNECT_SYSCALL 1
+#define __ASSUME_RECVFROM_SYSCALL 1
+#define __ASSUME_SENDTO_SYSCALL 1
+#define __ASSUME_ACCEPT4_SYSCALL 1
+#define __ASSUME_RECVMMSG_SYSCALL 1
+#define __ASSUME_SENDMMSG_SYSCALL 1
+
+/* Support for SysV IPC through wired syscalls. All supported architectures
+ either support ipc syscall and/or all the ipc correspondent syscalls. */
+#define __ASSUME_DIRECT_SYSVIPC_SYSCALLS 1
+
+/* Support for p{read,write}v2 was added in 4.6. However Linux default
+ implementation does not assume the __ASSUME_* and instead use a fallback
+ implementation based on p{read,write}v and returning an error for
+ non supported flags. */
+
+/* Support for the execveat syscall was added in 3.19. */
+#if __LINUX_KERNEL_VERSION >= 0x031300
+# define __ASSUME_EXECVEAT 1
#endif
projects / thirdparty / glibc.git / blobdiff