diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/kernel-features.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/kernel-features.h | 148 |
1 files changed, 72 insertions, 76 deletions
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h index 9832f41167..5543d92d7e 100644 --- a/sysdeps/unix/sysv/linux/kernel-features.h +++ b/sysdeps/unix/sysv/linux/kernel-features.h @@ -1,6 +1,6 @@ /* Set flags signalling availability of kernel features based on given kernel version number. - Copyright (C) 1999-2016 Free Software Foundation, Inc. + Copyright (C) 1999-2018 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 @@ -37,9 +37,6 @@ introduced. If somebody cares these values can afterwards be corrected. */ -/* The sendfile syscall was introduced in 2.2.0. */ -#define __ASSUME_SENDFILE 1 - /* Some architectures use the socketcall multiplexer for some or all socket-related operations instead of separate syscalls. __ASSUME_SOCKETCALL is defined for such architectures. */ @@ -48,17 +45,12 @@ and still does not have a 64-bit inode field. */ #define __ASSUME_ST_INO_64_BIT 1 -/* The getdents64 syscall was introduced in 2.4.0-test7 (but later for - MIPS n32). */ -#define __ASSUME_GETDENTS64_SYSCALL 1 - /* The statfs64 syscalls are available in 2.5.74 (but not for alpha). */ #define __ASSUME_STATFS64 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. */ @@ -69,47 +61,9 @@ configurations). */ #define __ASSUME_SET_ROBUST_LIST 1 -/* Support for PI futexes was added in 2.6.18 (but some architectures - lack futex_atomic_cmpxchg_inatomic in some configurations). */ -#define __ASSUME_FUTEX_LOCK_PI 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_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 - -#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 @@ -118,43 +72,85 @@ #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). */ -#define __ASSUME_REQUEUE_PI 1 - -/* 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 +/* 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 renameat2 system call was added in kernel 3.15. */ +#if __LINUX_KERNEL_VERSION >= 0x030F00 +# define __ASSUME_RENAMEAT2 #endif -#if defined __ASSUME_RECVMMSG_SOCKETCALL || defined __ASSUME_RECVMMSG_SYSCALL -# define __ASSUME_RECVMMSG 1 +/* Support for the execveat syscall was added in 3.19. */ +#if __LINUX_KERNEL_VERSION >= 0x031300 +# define __ASSUME_EXECVEAT 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 +#if __LINUX_KERNEL_VERSION >= 0x040400 +# define __ASSUME_MLOCK2 1 #endif -/* statfs fills in f_flags since 2.6.36. */ -#if __LINUX_KERNEL_VERSION >= 0x020624 -# define __ASSUME_STATFS_F_FLAGS 1 +#if __LINUX_KERNEL_VERSION >= 0x040500 +# define __ASSUME_COPY_FILE_RANGE 1 #endif -/* prlimit64 is available in 2.6.36. */ -#if __LINUX_KERNEL_VERSION >= 0x020624 -# define __ASSUME_PRLIMIT64 1 +/* Support for statx was added in kernel 4.11. */ +#if __LINUX_KERNEL_VERSION >= 0x040B00 +# define __ASSUME_STATX 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 +/* Support for clone call used on fork. The signature varies across the + architectures with current 4 different variants: -#if defined __ASSUME_SENDMMSG_SOCKETCALL || defined __ASSUME_SENDMMSG_SYSCALL -# define __ASSUME_SENDMMSG 1 -#endif + 1. long int clone (unsigned long flags, unsigned long newsp, + int *parent_tidptr, unsigned long tls, + int *child_tidptr) + + 2. long int clone (unsigned long newsp, unsigned long clone_flags, + int *parent_tidptr, int * child_tidptr, + unsigned long tls) + + 3. long int clone (unsigned long flags, unsigned long newsp, + int stack_size, int *parent_tidptr, + int *child_tidptr, unsigned long tls) + + 4. long int clone (unsigned long flags, unsigned long newsp, + int *parent_tidptr, int *child_tidptr, + unsigned long tls) + + The fourth variant is intended to be used as the default for newer ports, + Also IA64 uses the third variant but with __NR_clone2 instead of + __NR_clone. + + The macros names to define the variant used for the architecture is + similar to kernel: + + - __ASSUME_CLONE_BACKWARDS: for variant 1. + - __ASSUME_CLONE_BACKWARDS2: for variant 2 (s390). + - __ASSUME_CLONE_BACKWARDS3: for variant 3 (microblaze). + - __ASSUME_CLONE_DEFAULT: for variant 4. + - __ASSUME_CLONE2: for clone2 with variant 3 (ia64). + */ + +#define __ASSUME_CLONE_DEFAULT 1 |