/* 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 the stat64/lstat64/fstat64 syscalls were introduced in 2.3.34. */
-#ifdef __i386__
-# define __ASSUME_STAT64_SYSCALL 1
-#endif
-
-/* On sparc the stat64/lstat64/fstat64 syscalls were introduced in
- 2.3.35. */
-#if defined __sparc__ && !defined __arch64__
-# define __ASSUME_STAT64_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_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
-
-/* SH kernels got stat64 during 2.4.0-test. */
-#ifdef __sh__
-# define __ASSUME_STAT64_SYSCALL 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. */
/* 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. */
-#ifndef __sh__
-# define __ASSUME_ST_INO_64_BIT 1
-#endif
-
-/* The getdents64 syscall was introduced in 2.4.0-test7 (but later for
- MIPS n32). */
-#define __ASSUME_GETDENTS64_SYSCALL 1
-
-/* Beginning with 2.6.12 the clock and timer supports CPU clocks. */
-#define __ASSUME_POSIX_CPU_TIMERS 1
+#define __ASSUME_ST_INO_64_BIT 1
/* The statfs64 syscalls are available in 2.5.74 (but not for alpha). */
#define __ASSUME_STATFS64 1
-/* 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__ \
- || defined __i386__ \
- || defined __x86_64__ \
- || defined __powerpc__ \
- || defined __sh__
-# define __ASSUME_UTIMES 1
-#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 (defined __i386__ || defined __sparc__ \
- || (defined __powerpc__ && !defined __powerpc64__))
-# define __ASSUME_FADVISE64_64_SYSCALL 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. */
-#ifdef __powerpc__
-# define __ASSUME_SWAPCONTEXT_SYSCALL 1
-#endif
-
-/* On sparc64 stat64/lstat64/fstat64 syscalls were introduced in 2.6.12. */
-#if defined __sparc__ && defined __arch64__
-# define __ASSUME_STAT64_SYSCALL 1
-#endif
-
-/* 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
+/* 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
-/* 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
+/* 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
-/* 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
-
-/* 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
-
-/* From 2.6.23 onwards the value of ARG_MAX depends on the stack
- size. */
-#define __LINUX_ARG_MAX_STACK_BASED_MIN_KERNEL 0x020617
-#if __LINUX_KERNEL_VERSION >= __LINUX_ARG_MAX_STACK_BASED_MIN_KERNEL
-# define __ASSUME_ARG_MAX_STACK_BASED 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
+#define __ASSUME_PRIVATE_FUTEX 1
-/* 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