/* Set flags signalling availability of kernel features based on given
kernel version number.
- Copyright (C) 1999-2014 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
#define __ASSUME_SENDFILE 1
/* Some architectures use the socketcall multiplexer for some or all
- socket-related operations, via a socket.S file in glibc, instead of
- separate syscalls. __ASSUME_SOCKETCALL is defined for such
- architectures. */
-#if defined __powerpc__ \
- || defined __s390__ \
- || defined __sh__ \
- || defined __sparc__
-# define __ASSUME_SOCKETCALL 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
+ 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
+#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, for s390 it was
- introduced in 2.6.21-rc5. */
-#define __ASSUME_UTIMES 1
-
/* 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
-#define __ASSUME_PPOLL 1
/* 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. */
/* Support for inter-process robust mutexes was added in 2.6.17 (but
some architectures lack futex_atomic_cmpxchg_inatomic in some
configurations). */
-#if !(defined __sparc__ && !defined __arch64__ && !defined __sparc_v9__)
-# define __ASSUME_SET_ROBUST_LIST 1
-#endif
-
-/* Support for PI futexes was added in 2.6.18 (but some architectures
- lack futex_atomic_cmpxchg_inatomic in some configurations). */
-#if !(defined __sparc__ && !defined __arch64__ && !defined __sparc_v9__)
-# define __ASSUME_FUTEX_LOCK_PI 1
-#endif
+#define __ASSUME_SET_ROBUST_LIST 1
/* Support for private futexes was added in 2.6.22. */
#define __ASSUME_PRIVATE_FUTEX 1
-/* Support for fallocate was added in 2.6.23, on s390
- only after 2.6.23-rc1. */
-#define __ASSUME_FALLOCATE 1
-
-/* Support for various CLOEXEC and NONBLOCK flags was added in
- 2.6.23. */
-#define __ASSUME_O_CLOEXEC 1
-
/* Support for various CLOEXEC and NONBLOCK flags was added in
2.6.27. */
-#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
-
-/* Support for accept4 functionality was added in 2.6.28, but for some
- architectures using a separate syscall rather than socketcall that
- syscall was only added later, and some architectures first had
- socketcall support then a separate syscall. Define
- __ASSUME_ACCEPT4_SOCKETCALL if glibc uses socketcall on this
- architecture and accept4 is available through socketcall,
- __ASSUME_ACCEPT4_SYSCALL if it is available through a separate
- syscall, __ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL if it became
- available through a separate syscall at the same time as through
- socketcall, and __ASSUME_ACCEPT4 if the accept4 function is known
- to work. */
-#ifdef __ASSUME_SOCKETCALL
-# define __ASSUME_ACCEPT4_SOCKETCALL 1
-#endif
-
-/* The accept4 syscall was added for x86_64 and SPARC in 2.6.28, and
- for PowerPC and SH in 2.6.37. */
-#if defined __sparc__ \
- || (__LINUX_KERNEL_VERSION >= 0x020625 \
- && (defined __powerpc__ || defined __sh__))
-# define __ASSUME_ACCEPT4_SYSCALL 1
-#endif
-#ifdef __sparc__
-# define __ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL 1
-#endif
-
-#if defined __ASSUME_ACCEPT4_SOCKETCALL || defined __ASSUME_ACCEPT4_SYSCALL
-# define __ASSUME_ACCEPT4 1
-#endif
/* Support for the FUTEX_CLOCK_REALTIME flag was added in 2.6.29. */
#define __ASSUME_FUTEX_CLOCK_REALTIME 1
#define __ASSUME_PREADV 1
#define __ASSUME_PWRITEV 1
-/* Support for FUTEX_*_REQUEUE_PI was added in 2.6.31 (but some
- architectures lack futex_atomic_cmpxchg_inatomic in some
- configurations). */
-#if !(defined __sparc__ && !defined __arch64__ && !defined __sparc_v9__)
-# define __ASSUME_REQUEUE_PI 1
-#endif
-
-/* Support for recvmmsg functionality was added in 2.6.33. The macros
- defined correspond to those for accept4. */
-#if __LINUX_KERNEL_VERSION >= 0x020621 && defined __ASSUME_SOCKETCALL
-# define __ASSUME_RECVMMSG_SOCKETCALL 1
-#endif
-
-/* The recvmmsg syscall was added for i386, x86_64 and SPARC in
- 2.6.33, and for PowerPC and SH in 2.6.37. */
-#if (__LINUX_KERNEL_VERSION >= 0x020621 \
- && defined __sparc__) \
- || (__LINUX_KERNEL_VERSION >= 0x020625 \
- && (defined __powerpc__ || defined __sh__))
-# define __ASSUME_RECVMMSG_SYSCALL 1
-#endif
-#ifdef __sparc__
-# define __ASSUME_RECVMMSG_SYSCALL_WITH_SOCKETCALL 1
-#endif
-
-#if defined __ASSUME_RECVMMSG_SOCKETCALL || defined __ASSUME_RECVMMSG_SYSCALL
-# define __ASSUME_RECVMMSG 1
-#endif
-
-/* Support for /proc/self/task/$tid/comm and /proc/$pid/task/$tid/comm was
- added in 2.6.33. */
-#if __LINUX_KERNEL_VERSION >= 0x020621
-# define __ASSUME_PROC_PID_TASK_COMM 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
-
-/* Support for sendmmsg functionality was added in 3.0. The macros
- defined correspond to those for accept4 and recvmmsg. */
-#if __LINUX_KERNEL_VERSION >= 0x030000 && defined __ASSUME_SOCKETCALL
-# define __ASSUME_SENDMMSG_SOCKETCALL 1
-#endif
-
-/* The sendmmsg syscall was added for i386, x86_64, PowerPC, SH and
- SPARC in 3.0. */
-#if __LINUX_KERNEL_VERSION >= 0x030000 \
- && (defined __powerpc__ \
- || defined __sh__ || defined __sparc__)
-# define __ASSUME_SENDMMSG_SYSCALL 1
-#endif
-#if defined __powerpc__ || defined __sh__ || defined __sparc__
-# define __ASSUME_SENDMMSG_SYSCALL_WITH_SOCKETCALL 1
-#endif
-
-#if defined __ASSUME_SENDMMSG_SOCKETCALL || defined __ASSUME_SENDMMSG_SYSCALL
-# define __ASSUME_SENDMMSG 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