2017-11-01 22:08:43 +08:00
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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2012-10-05 01:20:15 +08:00
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#include <asm/bitsperlong.h>
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/*
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* This file contains the system call numbers, based on the
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* layout of the x86-64 architecture, which embeds the
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* pointer to the syscall in the table.
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*
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* As a basic principle, no duplication of functionality
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* should be added, e.g. we don't use lseek when llseek
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* is present. New architectures should use this file
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* and implement the less feature-full calls in user space.
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*/
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#ifndef __SYSCALL
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#define __SYSCALL(x, y)
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#endif
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#if __BITS_PER_LONG == 32 || defined(__SYSCALL_COMPAT)
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#define __SC_3264(_nr, _32, _64) __SYSCALL(_nr, _32)
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#else
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#define __SC_3264(_nr, _32, _64) __SYSCALL(_nr, _64)
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#endif
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#ifdef __SYSCALL_COMPAT
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#define __SC_COMP(_nr, _sys, _comp) __SYSCALL(_nr, _comp)
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#define __SC_COMP_3264(_nr, _32, _64, _comp) __SYSCALL(_nr, _comp)
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#else
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#define __SC_COMP(_nr, _sys, _comp) __SYSCALL(_nr, _sys)
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#define __SC_COMP_3264(_nr, _32, _64, _comp) __SC_3264(_nr, _32, _64)
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#endif
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#define __NR_io_setup 0
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__SC_COMP(__NR_io_setup, sys_io_setup, compat_sys_io_setup)
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#define __NR_io_destroy 1
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__SYSCALL(__NR_io_destroy, sys_io_destroy)
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#define __NR_io_submit 2
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__SC_COMP(__NR_io_submit, sys_io_submit, compat_sys_io_submit)
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#define __NR_io_cancel 3
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__SYSCALL(__NR_io_cancel, sys_io_cancel)
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#define __NR_io_getevents 4
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__SC_COMP(__NR_io_getevents, sys_io_getevents, compat_sys_io_getevents)
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/* fs/xattr.c */
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#define __NR_setxattr 5
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__SYSCALL(__NR_setxattr, sys_setxattr)
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#define __NR_lsetxattr 6
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__SYSCALL(__NR_lsetxattr, sys_lsetxattr)
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#define __NR_fsetxattr 7
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__SYSCALL(__NR_fsetxattr, sys_fsetxattr)
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#define __NR_getxattr 8
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__SYSCALL(__NR_getxattr, sys_getxattr)
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#define __NR_lgetxattr 9
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__SYSCALL(__NR_lgetxattr, sys_lgetxattr)
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#define __NR_fgetxattr 10
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__SYSCALL(__NR_fgetxattr, sys_fgetxattr)
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#define __NR_listxattr 11
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__SYSCALL(__NR_listxattr, sys_listxattr)
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#define __NR_llistxattr 12
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__SYSCALL(__NR_llistxattr, sys_llistxattr)
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#define __NR_flistxattr 13
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__SYSCALL(__NR_flistxattr, sys_flistxattr)
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#define __NR_removexattr 14
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__SYSCALL(__NR_removexattr, sys_removexattr)
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#define __NR_lremovexattr 15
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__SYSCALL(__NR_lremovexattr, sys_lremovexattr)
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#define __NR_fremovexattr 16
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__SYSCALL(__NR_fremovexattr, sys_fremovexattr)
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/* fs/dcache.c */
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#define __NR_getcwd 17
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__SYSCALL(__NR_getcwd, sys_getcwd)
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/* fs/cookies.c */
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#define __NR_lookup_dcookie 18
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__SC_COMP(__NR_lookup_dcookie, sys_lookup_dcookie, compat_sys_lookup_dcookie)
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/* fs/eventfd.c */
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#define __NR_eventfd2 19
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__SYSCALL(__NR_eventfd2, sys_eventfd2)
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/* fs/eventpoll.c */
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#define __NR_epoll_create1 20
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__SYSCALL(__NR_epoll_create1, sys_epoll_create1)
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#define __NR_epoll_ctl 21
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__SYSCALL(__NR_epoll_ctl, sys_epoll_ctl)
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#define __NR_epoll_pwait 22
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__SC_COMP(__NR_epoll_pwait, sys_epoll_pwait, compat_sys_epoll_pwait)
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/* fs/fcntl.c */
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#define __NR_dup 23
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__SYSCALL(__NR_dup, sys_dup)
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#define __NR_dup3 24
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__SYSCALL(__NR_dup3, sys_dup3)
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#define __NR3264_fcntl 25
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__SC_COMP_3264(__NR3264_fcntl, sys_fcntl64, sys_fcntl, compat_sys_fcntl64)
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/* fs/inotify_user.c */
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#define __NR_inotify_init1 26
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__SYSCALL(__NR_inotify_init1, sys_inotify_init1)
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#define __NR_inotify_add_watch 27
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__SYSCALL(__NR_inotify_add_watch, sys_inotify_add_watch)
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#define __NR_inotify_rm_watch 28
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__SYSCALL(__NR_inotify_rm_watch, sys_inotify_rm_watch)
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/* fs/ioctl.c */
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#define __NR_ioctl 29
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__SC_COMP(__NR_ioctl, sys_ioctl, compat_sys_ioctl)
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/* fs/ioprio.c */
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#define __NR_ioprio_set 30
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__SYSCALL(__NR_ioprio_set, sys_ioprio_set)
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#define __NR_ioprio_get 31
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__SYSCALL(__NR_ioprio_get, sys_ioprio_get)
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/* fs/locks.c */
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#define __NR_flock 32
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__SYSCALL(__NR_flock, sys_flock)
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/* fs/namei.c */
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#define __NR_mknodat 33
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__SYSCALL(__NR_mknodat, sys_mknodat)
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#define __NR_mkdirat 34
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__SYSCALL(__NR_mkdirat, sys_mkdirat)
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#define __NR_unlinkat 35
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__SYSCALL(__NR_unlinkat, sys_unlinkat)
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#define __NR_symlinkat 36
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__SYSCALL(__NR_symlinkat, sys_symlinkat)
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#define __NR_linkat 37
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__SYSCALL(__NR_linkat, sys_linkat)
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2016-04-30 05:29:26 +08:00
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#ifdef __ARCH_WANT_RENAMEAT
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/* renameat is superseded with flags by renameat2 */
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2012-10-05 01:20:15 +08:00
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#define __NR_renameat 38
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__SYSCALL(__NR_renameat, sys_renameat)
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2016-04-30 05:29:26 +08:00
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#endif /* __ARCH_WANT_RENAMEAT */
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2012-10-05 01:20:15 +08:00
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/* fs/namespace.c */
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#define __NR_umount2 39
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__SYSCALL(__NR_umount2, sys_umount)
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#define __NR_mount 40
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__SC_COMP(__NR_mount, sys_mount, compat_sys_mount)
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#define __NR_pivot_root 41
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__SYSCALL(__NR_pivot_root, sys_pivot_root)
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/* fs/nfsctl.c */
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#define __NR_nfsservctl 42
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__SYSCALL(__NR_nfsservctl, sys_ni_syscall)
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/* fs/open.c */
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#define __NR3264_statfs 43
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__SC_COMP_3264(__NR3264_statfs, sys_statfs64, sys_statfs, \
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compat_sys_statfs64)
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#define __NR3264_fstatfs 44
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__SC_COMP_3264(__NR3264_fstatfs, sys_fstatfs64, sys_fstatfs, \
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compat_sys_fstatfs64)
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#define __NR3264_truncate 45
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__SC_COMP_3264(__NR3264_truncate, sys_truncate64, sys_truncate, \
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compat_sys_truncate64)
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#define __NR3264_ftruncate 46
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__SC_COMP_3264(__NR3264_ftruncate, sys_ftruncate64, sys_ftruncate, \
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compat_sys_ftruncate64)
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#define __NR_fallocate 47
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__SC_COMP(__NR_fallocate, sys_fallocate, compat_sys_fallocate)
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#define __NR_faccessat 48
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__SYSCALL(__NR_faccessat, sys_faccessat)
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#define __NR_chdir 49
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__SYSCALL(__NR_chdir, sys_chdir)
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#define __NR_fchdir 50
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__SYSCALL(__NR_fchdir, sys_fchdir)
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#define __NR_chroot 51
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__SYSCALL(__NR_chroot, sys_chroot)
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#define __NR_fchmod 52
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__SYSCALL(__NR_fchmod, sys_fchmod)
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#define __NR_fchmodat 53
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__SYSCALL(__NR_fchmodat, sys_fchmodat)
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#define __NR_fchownat 54
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__SYSCALL(__NR_fchownat, sys_fchownat)
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#define __NR_fchown 55
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__SYSCALL(__NR_fchown, sys_fchown)
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#define __NR_openat 56
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__SC_COMP(__NR_openat, sys_openat, compat_sys_openat)
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#define __NR_close 57
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__SYSCALL(__NR_close, sys_close)
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#define __NR_vhangup 58
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__SYSCALL(__NR_vhangup, sys_vhangup)
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/* fs/pipe.c */
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#define __NR_pipe2 59
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__SYSCALL(__NR_pipe2, sys_pipe2)
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/* fs/quota.c */
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#define __NR_quotactl 60
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__SYSCALL(__NR_quotactl, sys_quotactl)
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/* fs/readdir.c */
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#define __NR_getdents64 61
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2017-04-09 02:34:51 +08:00
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__SYSCALL(__NR_getdents64, sys_getdents64)
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2012-10-05 01:20:15 +08:00
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/* fs/read_write.c */
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#define __NR3264_lseek 62
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__SC_3264(__NR3264_lseek, sys_llseek, sys_lseek)
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#define __NR_read 63
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__SYSCALL(__NR_read, sys_read)
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#define __NR_write 64
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__SYSCALL(__NR_write, sys_write)
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#define __NR_readv 65
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__SC_COMP(__NR_readv, sys_readv, compat_sys_readv)
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#define __NR_writev 66
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__SC_COMP(__NR_writev, sys_writev, compat_sys_writev)
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#define __NR_pread64 67
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__SC_COMP(__NR_pread64, sys_pread64, compat_sys_pread64)
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#define __NR_pwrite64 68
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__SC_COMP(__NR_pwrite64, sys_pwrite64, compat_sys_pwrite64)
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#define __NR_preadv 69
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__SC_COMP(__NR_preadv, sys_preadv, compat_sys_preadv)
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#define __NR_pwritev 70
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__SC_COMP(__NR_pwritev, sys_pwritev, compat_sys_pwritev)
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/* fs/sendfile.c */
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#define __NR3264_sendfile 71
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__SYSCALL(__NR3264_sendfile, sys_sendfile64)
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/* fs/select.c */
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#define __NR_pselect6 72
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__SC_COMP(__NR_pselect6, sys_pselect6, compat_sys_pselect6)
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#define __NR_ppoll 73
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__SC_COMP(__NR_ppoll, sys_ppoll, compat_sys_ppoll)
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/* fs/signalfd.c */
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#define __NR_signalfd4 74
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__SC_COMP(__NR_signalfd4, sys_signalfd4, compat_sys_signalfd4)
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/* fs/splice.c */
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#define __NR_vmsplice 75
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__SC_COMP(__NR_vmsplice, sys_vmsplice, compat_sys_vmsplice)
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#define __NR_splice 76
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__SYSCALL(__NR_splice, sys_splice)
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#define __NR_tee 77
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__SYSCALL(__NR_tee, sys_tee)
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/* fs/stat.c */
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#define __NR_readlinkat 78
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__SYSCALL(__NR_readlinkat, sys_readlinkat)
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#define __NR3264_fstatat 79
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__SC_3264(__NR3264_fstatat, sys_fstatat64, sys_newfstatat)
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#define __NR3264_fstat 80
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__SC_3264(__NR3264_fstat, sys_fstat64, sys_newfstat)
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/* fs/sync.c */
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#define __NR_sync 81
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__SYSCALL(__NR_sync, sys_sync)
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#define __NR_fsync 82
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__SYSCALL(__NR_fsync, sys_fsync)
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#define __NR_fdatasync 83
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__SYSCALL(__NR_fdatasync, sys_fdatasync)
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#ifdef __ARCH_WANT_SYNC_FILE_RANGE2
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#define __NR_sync_file_range2 84
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__SC_COMP(__NR_sync_file_range2, sys_sync_file_range2, \
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compat_sys_sync_file_range2)
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#else
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#define __NR_sync_file_range 84
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__SC_COMP(__NR_sync_file_range, sys_sync_file_range, \
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compat_sys_sync_file_range)
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#endif
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/* fs/timerfd.c */
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#define __NR_timerfd_create 85
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__SYSCALL(__NR_timerfd_create, sys_timerfd_create)
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#define __NR_timerfd_settime 86
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__SC_COMP(__NR_timerfd_settime, sys_timerfd_settime, \
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compat_sys_timerfd_settime)
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#define __NR_timerfd_gettime 87
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__SC_COMP(__NR_timerfd_gettime, sys_timerfd_gettime, \
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compat_sys_timerfd_gettime)
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/* fs/utimes.c */
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#define __NR_utimensat 88
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__SC_COMP(__NR_utimensat, sys_utimensat, compat_sys_utimensat)
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/* kernel/acct.c */
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#define __NR_acct 89
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|
|
|
|
__SYSCALL(__NR_acct, sys_acct)
|
|
|
|
|
|
|
|
|
|
/* kernel/capability.c */
|
|
|
|
|
#define __NR_capget 90
|
|
|
|
|
__SYSCALL(__NR_capget, sys_capget)
|
|
|
|
|
#define __NR_capset 91
|
|
|
|
|
__SYSCALL(__NR_capset, sys_capset)
|
|
|
|
|
|
|
|
|
|
/* kernel/exec_domain.c */
|
|
|
|
|
#define __NR_personality 92
|
|
|
|
|
__SYSCALL(__NR_personality, sys_personality)
|
|
|
|
|
|
|
|
|
|
/* kernel/exit.c */
|
|
|
|
|
#define __NR_exit 93
|
|
|
|
|
__SYSCALL(__NR_exit, sys_exit)
|
|
|
|
|
#define __NR_exit_group 94
|
|
|
|
|
__SYSCALL(__NR_exit_group, sys_exit_group)
|
|
|
|
|
#define __NR_waitid 95
|
|
|
|
|
__SC_COMP(__NR_waitid, sys_waitid, compat_sys_waitid)
|
|
|
|
|
|
|
|
|
|
/* kernel/fork.c */
|
|
|
|
|
#define __NR_set_tid_address 96
|
|
|
|
|
__SYSCALL(__NR_set_tid_address, sys_set_tid_address)
|
|
|
|
|
#define __NR_unshare 97
|
|
|
|
|
__SYSCALL(__NR_unshare, sys_unshare)
|
|
|
|
|
|
|
|
|
|
/* kernel/futex.c */
|
|
|
|
|
#define __NR_futex 98
|
|
|
|
|
__SC_COMP(__NR_futex, sys_futex, compat_sys_futex)
|
|
|
|
|
#define __NR_set_robust_list 99
|
|
|
|
|
__SC_COMP(__NR_set_robust_list, sys_set_robust_list, \
|
|
|
|
|
compat_sys_set_robust_list)
|
|
|
|
|
#define __NR_get_robust_list 100
|
|
|
|
|
__SC_COMP(__NR_get_robust_list, sys_get_robust_list, \
|
|
|
|
|
compat_sys_get_robust_list)
|
|
|
|
|
|
|
|
|
|
/* kernel/hrtimer.c */
|
|
|
|
|
#define __NR_nanosleep 101
|
|
|
|
|
__SC_COMP(__NR_nanosleep, sys_nanosleep, compat_sys_nanosleep)
|
|
|
|
|
|
|
|
|
|
/* kernel/itimer.c */
|
|
|
|
|
#define __NR_getitimer 102
|
|
|
|
|
__SC_COMP(__NR_getitimer, sys_getitimer, compat_sys_getitimer)
|
|
|
|
|
#define __NR_setitimer 103
|
|
|
|
|
__SC_COMP(__NR_setitimer, sys_setitimer, compat_sys_setitimer)
|
|
|
|
|
|
|
|
|
|
/* kernel/kexec.c */
|
|
|
|
|
#define __NR_kexec_load 104
|
|
|
|
|
__SC_COMP(__NR_kexec_load, sys_kexec_load, compat_sys_kexec_load)
|
|
|
|
|
|
|
|
|
|
/* kernel/module.c */
|
|
|
|
|
#define __NR_init_module 105
|
|
|
|
|
__SYSCALL(__NR_init_module, sys_init_module)
|
|
|
|
|
#define __NR_delete_module 106
|
|
|
|
|
__SYSCALL(__NR_delete_module, sys_delete_module)
|
|
|
|
|
|
|
|
|
|
/* kernel/posix-timers.c */
|
|
|
|
|
#define __NR_timer_create 107
|
|
|
|
|
__SC_COMP(__NR_timer_create, sys_timer_create, compat_sys_timer_create)
|
|
|
|
|
#define __NR_timer_gettime 108
|
|
|
|
|
__SC_COMP(__NR_timer_gettime, sys_timer_gettime, compat_sys_timer_gettime)
|
|
|
|
|
#define __NR_timer_getoverrun 109
|
|
|
|
|
__SYSCALL(__NR_timer_getoverrun, sys_timer_getoverrun)
|
|
|
|
|
#define __NR_timer_settime 110
|
|
|
|
|
__SC_COMP(__NR_timer_settime, sys_timer_settime, compat_sys_timer_settime)
|
|
|
|
|
#define __NR_timer_delete 111
|
|
|
|
|
__SYSCALL(__NR_timer_delete, sys_timer_delete)
|
|
|
|
|
#define __NR_clock_settime 112
|
|
|
|
|
__SC_COMP(__NR_clock_settime, sys_clock_settime, compat_sys_clock_settime)
|
|
|
|
|
#define __NR_clock_gettime 113
|
|
|
|
|
__SC_COMP(__NR_clock_gettime, sys_clock_gettime, compat_sys_clock_gettime)
|
|
|
|
|
#define __NR_clock_getres 114
|
|
|
|
|
__SC_COMP(__NR_clock_getres, sys_clock_getres, compat_sys_clock_getres)
|
|
|
|
|
#define __NR_clock_nanosleep 115
|
|
|
|
|
__SC_COMP(__NR_clock_nanosleep, sys_clock_nanosleep, \
|
|
|
|
|
compat_sys_clock_nanosleep)
|
|
|
|
|
|
|
|
|
|
/* kernel/printk.c */
|
|
|
|
|
#define __NR_syslog 116
|
|
|
|
|
__SYSCALL(__NR_syslog, sys_syslog)
|
|
|
|
|
|
|
|
|
|
/* kernel/ptrace.c */
|
|
|
|
|
#define __NR_ptrace 117
|
|
|
|
|
__SYSCALL(__NR_ptrace, sys_ptrace)
|
|
|
|
|
|
2013-06-04 15:40:24 +08:00
|
|
|
/* kernel/sched/core.c */
|
2012-10-05 01:20:15 +08:00
|
|
|
#define __NR_sched_setparam 118
|
|
|
|
|
__SYSCALL(__NR_sched_setparam, sys_sched_setparam)
|
|
|
|
|
#define __NR_sched_setscheduler 119
|
|
|
|
|
__SYSCALL(__NR_sched_setscheduler, sys_sched_setscheduler)
|
|
|
|
|
#define __NR_sched_getscheduler 120
|
|
|
|
|
__SYSCALL(__NR_sched_getscheduler, sys_sched_getscheduler)
|
|
|
|
|
#define __NR_sched_getparam 121
|
|
|
|
|
__SYSCALL(__NR_sched_getparam, sys_sched_getparam)
|
|
|
|
|
#define __NR_sched_setaffinity 122
|
|
|
|
|
__SC_COMP(__NR_sched_setaffinity, sys_sched_setaffinity, \
|
|
|
|
|
compat_sys_sched_setaffinity)
|
|
|
|
|
#define __NR_sched_getaffinity 123
|
|
|
|
|
__SC_COMP(__NR_sched_getaffinity, sys_sched_getaffinity, \
|
|
|
|
|
compat_sys_sched_getaffinity)
|
|
|
|
|
#define __NR_sched_yield 124
|
|
|
|
|
__SYSCALL(__NR_sched_yield, sys_sched_yield)
|
|
|
|
|
#define __NR_sched_get_priority_max 125
|
|
|
|
|
__SYSCALL(__NR_sched_get_priority_max, sys_sched_get_priority_max)
|
|
|
|
|
#define __NR_sched_get_priority_min 126
|
|
|
|
|
__SYSCALL(__NR_sched_get_priority_min, sys_sched_get_priority_min)
|
|
|
|
|
#define __NR_sched_rr_get_interval 127
|
|
|
|
|
__SC_COMP(__NR_sched_rr_get_interval, sys_sched_rr_get_interval, \
|
|
|
|
|
compat_sys_sched_rr_get_interval)
|
|
|
|
|
|
|
|
|
|
/* kernel/signal.c */
|
|
|
|
|
#define __NR_restart_syscall 128
|
|
|
|
|
__SYSCALL(__NR_restart_syscall, sys_restart_syscall)
|
|
|
|
|
#define __NR_kill 129
|
|
|
|
|
__SYSCALL(__NR_kill, sys_kill)
|
|
|
|
|
#define __NR_tkill 130
|
|
|
|
|
__SYSCALL(__NR_tkill, sys_tkill)
|
|
|
|
|
#define __NR_tgkill 131
|
|
|
|
|
__SYSCALL(__NR_tgkill, sys_tgkill)
|
|
|
|
|
#define __NR_sigaltstack 132
|
|
|
|
|
__SC_COMP(__NR_sigaltstack, sys_sigaltstack, compat_sys_sigaltstack)
|
|
|
|
|
#define __NR_rt_sigsuspend 133
|
|
|
|
|
__SC_COMP(__NR_rt_sigsuspend, sys_rt_sigsuspend, compat_sys_rt_sigsuspend)
|
|
|
|
|
#define __NR_rt_sigaction 134
|
|
|
|
|
__SC_COMP(__NR_rt_sigaction, sys_rt_sigaction, compat_sys_rt_sigaction)
|
|
|
|
|
#define __NR_rt_sigprocmask 135
|
2012-12-26 02:58:56 +08:00
|
|
|
__SC_COMP(__NR_rt_sigprocmask, sys_rt_sigprocmask, compat_sys_rt_sigprocmask)
|
2012-10-05 01:20:15 +08:00
|
|
|
#define __NR_rt_sigpending 136
|
2012-12-26 02:58:56 +08:00
|
|
|
__SC_COMP(__NR_rt_sigpending, sys_rt_sigpending, compat_sys_rt_sigpending)
|
2012-10-05 01:20:15 +08:00
|
|
|
#define __NR_rt_sigtimedwait 137
|
|
|
|
|
__SC_COMP(__NR_rt_sigtimedwait, sys_rt_sigtimedwait, \
|
|
|
|
|
compat_sys_rt_sigtimedwait)
|
|
|
|
|
#define __NR_rt_sigqueueinfo 138
|
|
|
|
|
__SC_COMP(__NR_rt_sigqueueinfo, sys_rt_sigqueueinfo, \
|
|
|
|
|
compat_sys_rt_sigqueueinfo)
|
|
|
|
|
#define __NR_rt_sigreturn 139
|
|
|
|
|
__SC_COMP(__NR_rt_sigreturn, sys_rt_sigreturn, compat_sys_rt_sigreturn)
|
|
|
|
|
|
|
|
|
|
/* kernel/sys.c */
|
|
|
|
|
#define __NR_setpriority 140
|
|
|
|
|
__SYSCALL(__NR_setpriority, sys_setpriority)
|
|
|
|
|
#define __NR_getpriority 141
|
|
|
|
|
__SYSCALL(__NR_getpriority, sys_getpriority)
|
|
|
|
|
#define __NR_reboot 142
|
|
|
|
|
__SYSCALL(__NR_reboot, sys_reboot)
|
|
|
|
|
#define __NR_setregid 143
|
|
|
|
|
__SYSCALL(__NR_setregid, sys_setregid)
|
|
|
|
|
#define __NR_setgid 144
|
|
|
|
|
__SYSCALL(__NR_setgid, sys_setgid)
|
|
|
|
|
#define __NR_setreuid 145
|
|
|
|
|
__SYSCALL(__NR_setreuid, sys_setreuid)
|
|
|
|
|
#define __NR_setuid 146
|
|
|
|
|
__SYSCALL(__NR_setuid, sys_setuid)
|
|
|
|
|
#define __NR_setresuid 147
|
|
|
|
|
__SYSCALL(__NR_setresuid, sys_setresuid)
|
|
|
|
|
#define __NR_getresuid 148
|
|
|
|
|
__SYSCALL(__NR_getresuid, sys_getresuid)
|
|
|
|
|
#define __NR_setresgid 149
|
|
|
|
|
__SYSCALL(__NR_setresgid, sys_setresgid)
|
|
|
|
|
#define __NR_getresgid 150
|
|
|
|
|
__SYSCALL(__NR_getresgid, sys_getresgid)
|
|
|
|
|
#define __NR_setfsuid 151
|
|
|
|
|
__SYSCALL(__NR_setfsuid, sys_setfsuid)
|
|
|
|
|
#define __NR_setfsgid 152
|
|
|
|
|
__SYSCALL(__NR_setfsgid, sys_setfsgid)
|
|
|
|
|
#define __NR_times 153
|
|
|
|
|
__SC_COMP(__NR_times, sys_times, compat_sys_times)
|
|
|
|
|
#define __NR_setpgid 154
|
|
|
|
|
__SYSCALL(__NR_setpgid, sys_setpgid)
|
|
|
|
|
#define __NR_getpgid 155
|
|
|
|
|
__SYSCALL(__NR_getpgid, sys_getpgid)
|
|
|
|
|
#define __NR_getsid 156
|
|
|
|
|
__SYSCALL(__NR_getsid, sys_getsid)
|
|
|
|
|
#define __NR_setsid 157
|
|
|
|
|
__SYSCALL(__NR_setsid, sys_setsid)
|
|
|
|
|
#define __NR_getgroups 158
|
|
|
|
|
__SYSCALL(__NR_getgroups, sys_getgroups)
|
|
|
|
|
#define __NR_setgroups 159
|
|
|
|
|
__SYSCALL(__NR_setgroups, sys_setgroups)
|
|
|
|
|
#define __NR_uname 160
|
|
|
|
|
__SYSCALL(__NR_uname, sys_newuname)
|
|
|
|
|
#define __NR_sethostname 161
|
|
|
|
|
__SYSCALL(__NR_sethostname, sys_sethostname)
|
|
|
|
|
#define __NR_setdomainname 162
|
|
|
|
|
__SYSCALL(__NR_setdomainname, sys_setdomainname)
|
|
|
|
|
#define __NR_getrlimit 163
|
|
|
|
|
__SC_COMP(__NR_getrlimit, sys_getrlimit, compat_sys_getrlimit)
|
|
|
|
|
#define __NR_setrlimit 164
|
|
|
|
|
__SC_COMP(__NR_setrlimit, sys_setrlimit, compat_sys_setrlimit)
|
|
|
|
|
#define __NR_getrusage 165
|
|
|
|
|
__SC_COMP(__NR_getrusage, sys_getrusage, compat_sys_getrusage)
|
|
|
|
|
#define __NR_umask 166
|
|
|
|
|
__SYSCALL(__NR_umask, sys_umask)
|
|
|
|
|
#define __NR_prctl 167
|
|
|
|
|
__SYSCALL(__NR_prctl, sys_prctl)
|
|
|
|
|
#define __NR_getcpu 168
|
|
|
|
|
__SYSCALL(__NR_getcpu, sys_getcpu)
|
|
|
|
|
|
|
|
|
|
/* kernel/time.c */
|
|
|
|
|
#define __NR_gettimeofday 169
|
|
|
|
|
__SC_COMP(__NR_gettimeofday, sys_gettimeofday, compat_sys_gettimeofday)
|
|
|
|
|
#define __NR_settimeofday 170
|
|
|
|
|
__SC_COMP(__NR_settimeofday, sys_settimeofday, compat_sys_settimeofday)
|
|
|
|
|
#define __NR_adjtimex 171
|
|
|
|
|
__SC_COMP(__NR_adjtimex, sys_adjtimex, compat_sys_adjtimex)
|
|
|
|
|
|
|
|
|
|
/* kernel/timer.c */
|
|
|
|
|
#define __NR_getpid 172
|
|
|
|
|
__SYSCALL(__NR_getpid, sys_getpid)
|
|
|
|
|
#define __NR_getppid 173
|
|
|
|
|
__SYSCALL(__NR_getppid, sys_getppid)
|
|
|
|
|
#define __NR_getuid 174
|
|
|
|
|
__SYSCALL(__NR_getuid, sys_getuid)
|
|
|
|
|
#define __NR_geteuid 175
|
|
|
|
|
__SYSCALL(__NR_geteuid, sys_geteuid)
|
|
|
|
|
#define __NR_getgid 176
|
|
|
|
|
__SYSCALL(__NR_getgid, sys_getgid)
|
|
|
|
|
#define __NR_getegid 177
|
|
|
|
|
__SYSCALL(__NR_getegid, sys_getegid)
|
|
|
|
|
#define __NR_gettid 178
|
|
|
|
|
__SYSCALL(__NR_gettid, sys_gettid)
|
|
|
|
|
#define __NR_sysinfo 179
|
|
|
|
|
__SC_COMP(__NR_sysinfo, sys_sysinfo, compat_sys_sysinfo)
|
|
|
|
|
|
|
|
|
|
/* ipc/mqueue.c */
|
|
|
|
|
#define __NR_mq_open 180
|
|
|
|
|
__SC_COMP(__NR_mq_open, sys_mq_open, compat_sys_mq_open)
|
|
|
|
|
#define __NR_mq_unlink 181
|
|
|
|
|
__SYSCALL(__NR_mq_unlink, sys_mq_unlink)
|
|
|
|
|
#define __NR_mq_timedsend 182
|
|
|
|
|
__SC_COMP(__NR_mq_timedsend, sys_mq_timedsend, compat_sys_mq_timedsend)
|
|
|
|
|
#define __NR_mq_timedreceive 183
|
|
|
|
|
__SC_COMP(__NR_mq_timedreceive, sys_mq_timedreceive, \
|
|
|
|
|
compat_sys_mq_timedreceive)
|
|
|
|
|
#define __NR_mq_notify 184
|
|
|
|
|
__SC_COMP(__NR_mq_notify, sys_mq_notify, compat_sys_mq_notify)
|
|
|
|
|
#define __NR_mq_getsetattr 185
|
|
|
|
|
__SC_COMP(__NR_mq_getsetattr, sys_mq_getsetattr, compat_sys_mq_getsetattr)
|
|
|
|
|
|
|
|
|
|
/* ipc/msg.c */
|
|
|
|
|
#define __NR_msgget 186
|
|
|
|
|
__SYSCALL(__NR_msgget, sys_msgget)
|
|
|
|
|
#define __NR_msgctl 187
|
|
|
|
|
__SC_COMP(__NR_msgctl, sys_msgctl, compat_sys_msgctl)
|
|
|
|
|
#define __NR_msgrcv 188
|
|
|
|
|
__SC_COMP(__NR_msgrcv, sys_msgrcv, compat_sys_msgrcv)
|
|
|
|
|
#define __NR_msgsnd 189
|
|
|
|
|
__SC_COMP(__NR_msgsnd, sys_msgsnd, compat_sys_msgsnd)
|
|
|
|
|
|
|
|
|
|
/* ipc/sem.c */
|
|
|
|
|
#define __NR_semget 190
|
|
|
|
|
__SYSCALL(__NR_semget, sys_semget)
|
|
|
|
|
#define __NR_semctl 191
|
|
|
|
|
__SC_COMP(__NR_semctl, sys_semctl, compat_sys_semctl)
|
|
|
|
|
#define __NR_semtimedop 192
|
|
|
|
|
__SC_COMP(__NR_semtimedop, sys_semtimedop, compat_sys_semtimedop)
|
|
|
|
|
#define __NR_semop 193
|
|
|
|
|
__SYSCALL(__NR_semop, sys_semop)
|
|
|
|
|
|
|
|
|
|
/* ipc/shm.c */
|
|
|
|
|
#define __NR_shmget 194
|
|
|
|
|
__SYSCALL(__NR_shmget, sys_shmget)
|
|
|
|
|
#define __NR_shmctl 195
|
|
|
|
|
__SC_COMP(__NR_shmctl, sys_shmctl, compat_sys_shmctl)
|
|
|
|
|
#define __NR_shmat 196
|
|
|
|
|
__SC_COMP(__NR_shmat, sys_shmat, compat_sys_shmat)
|
|
|
|
|
#define __NR_shmdt 197
|
|
|
|
|
__SYSCALL(__NR_shmdt, sys_shmdt)
|
|
|
|
|
|
|
|
|
|
/* net/socket.c */
|
|
|
|
|
#define __NR_socket 198
|
|
|
|
|
__SYSCALL(__NR_socket, sys_socket)
|
|
|
|
|
#define __NR_socketpair 199
|
|
|
|
|
__SYSCALL(__NR_socketpair, sys_socketpair)
|
|
|
|
|
#define __NR_bind 200
|
|
|
|
|
__SYSCALL(__NR_bind, sys_bind)
|
|
|
|
|
#define __NR_listen 201
|
|
|
|
|
__SYSCALL(__NR_listen, sys_listen)
|
|
|
|
|
#define __NR_accept 202
|
|
|
|
|
__SYSCALL(__NR_accept, sys_accept)
|
|
|
|
|
#define __NR_connect 203
|
|
|
|
|
__SYSCALL(__NR_connect, sys_connect)
|
|
|
|
|
#define __NR_getsockname 204
|
|
|
|
|
__SYSCALL(__NR_getsockname, sys_getsockname)
|
|
|
|
|
#define __NR_getpeername 205
|
|
|
|
|
__SYSCALL(__NR_getpeername, sys_getpeername)
|
|
|
|
|
#define __NR_sendto 206
|
|
|
|
|
__SYSCALL(__NR_sendto, sys_sendto)
|
|
|
|
|
#define __NR_recvfrom 207
|
|
|
|
|
__SC_COMP(__NR_recvfrom, sys_recvfrom, compat_sys_recvfrom)
|
|
|
|
|
#define __NR_setsockopt 208
|
|
|
|
|
__SC_COMP(__NR_setsockopt, sys_setsockopt, compat_sys_setsockopt)
|
|
|
|
|
#define __NR_getsockopt 209
|
|
|
|
|
__SC_COMP(__NR_getsockopt, sys_getsockopt, compat_sys_getsockopt)
|
|
|
|
|
#define __NR_shutdown 210
|
|
|
|
|
__SYSCALL(__NR_shutdown, sys_shutdown)
|
|
|
|
|
#define __NR_sendmsg 211
|
|
|
|
|
__SC_COMP(__NR_sendmsg, sys_sendmsg, compat_sys_sendmsg)
|
|
|
|
|
#define __NR_recvmsg 212
|
|
|
|
|
__SC_COMP(__NR_recvmsg, sys_recvmsg, compat_sys_recvmsg)
|
|
|
|
|
|
|
|
|
|
/* mm/filemap.c */
|
|
|
|
|
#define __NR_readahead 213
|
|
|
|
|
__SC_COMP(__NR_readahead, sys_readahead, compat_sys_readahead)
|
|
|
|
|
|
|
|
|
|
/* mm/nommu.c, also with MMU */
|
|
|
|
|
#define __NR_brk 214
|
|
|
|
|
__SYSCALL(__NR_brk, sys_brk)
|
|
|
|
|
#define __NR_munmap 215
|
|
|
|
|
__SYSCALL(__NR_munmap, sys_munmap)
|
|
|
|
|
#define __NR_mremap 216
|
|
|
|
|
__SYSCALL(__NR_mremap, sys_mremap)
|
|
|
|
|
|
|
|
|
|
/* security/keys/keyctl.c */
|
|
|
|
|
#define __NR_add_key 217
|
|
|
|
|
__SYSCALL(__NR_add_key, sys_add_key)
|
|
|
|
|
#define __NR_request_key 218
|
|
|
|
|
__SYSCALL(__NR_request_key, sys_request_key)
|
|
|
|
|
#define __NR_keyctl 219
|
|
|
|
|
__SC_COMP(__NR_keyctl, sys_keyctl, compat_sys_keyctl)
|
|
|
|
|
|
|
|
|
|
/* arch/example/kernel/sys_example.c */
|
|
|
|
|
#define __NR_clone 220
|
|
|
|
|
__SYSCALL(__NR_clone, sys_clone)
|
|
|
|
|
#define __NR_execve 221
|
|
|
|
|
__SC_COMP(__NR_execve, sys_execve, compat_sys_execve)
|
|
|
|
|
|
|
|
|
|
#define __NR3264_mmap 222
|
|
|
|
|
__SC_3264(__NR3264_mmap, sys_mmap2, sys_mmap)
|
|
|
|
|
/* mm/fadvise.c */
|
|
|
|
|
#define __NR3264_fadvise64 223
|
|
|
|
|
__SC_COMP(__NR3264_fadvise64, sys_fadvise64_64, compat_sys_fadvise64_64)
|
|
|
|
|
|
|
|
|
|
/* mm/, CONFIG_MMU only */
|
|
|
|
|
#ifndef __ARCH_NOMMU
|
|
|
|
|
#define __NR_swapon 224
|
|
|
|
|
__SYSCALL(__NR_swapon, sys_swapon)
|
|
|
|
|
#define __NR_swapoff 225
|
|
|
|
|
__SYSCALL(__NR_swapoff, sys_swapoff)
|
|
|
|
|
#define __NR_mprotect 226
|
|
|
|
|
__SYSCALL(__NR_mprotect, sys_mprotect)
|
|
|
|
|
#define __NR_msync 227
|
|
|
|
|
__SYSCALL(__NR_msync, sys_msync)
|
|
|
|
|
#define __NR_mlock 228
|
|
|
|
|
__SYSCALL(__NR_mlock, sys_mlock)
|
|
|
|
|
#define __NR_munlock 229
|
|
|
|
|
__SYSCALL(__NR_munlock, sys_munlock)
|
|
|
|
|
#define __NR_mlockall 230
|
|
|
|
|
__SYSCALL(__NR_mlockall, sys_mlockall)
|
|
|
|
|
#define __NR_munlockall 231
|
|
|
|
|
__SYSCALL(__NR_munlockall, sys_munlockall)
|
|
|
|
|
#define __NR_mincore 232
|
|
|
|
|
__SYSCALL(__NR_mincore, sys_mincore)
|
|
|
|
|
#define __NR_madvise 233
|
|
|
|
|
__SYSCALL(__NR_madvise, sys_madvise)
|
|
|
|
|
#define __NR_remap_file_pages 234
|
|
|
|
|
__SYSCALL(__NR_remap_file_pages, sys_remap_file_pages)
|
|
|
|
|
#define __NR_mbind 235
|
|
|
|
|
__SC_COMP(__NR_mbind, sys_mbind, compat_sys_mbind)
|
|
|
|
|
#define __NR_get_mempolicy 236
|
|
|
|
|
__SC_COMP(__NR_get_mempolicy, sys_get_mempolicy, compat_sys_get_mempolicy)
|
|
|
|
|
#define __NR_set_mempolicy 237
|
|
|
|
|
__SC_COMP(__NR_set_mempolicy, sys_set_mempolicy, compat_sys_set_mempolicy)
|
|
|
|
|
#define __NR_migrate_pages 238
|
|
|
|
|
__SC_COMP(__NR_migrate_pages, sys_migrate_pages, compat_sys_migrate_pages)
|
|
|
|
|
#define __NR_move_pages 239
|
|
|
|
|
__SC_COMP(__NR_move_pages, sys_move_pages, compat_sys_move_pages)
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#define __NR_rt_tgsigqueueinfo 240
|
|
|
|
|
__SC_COMP(__NR_rt_tgsigqueueinfo, sys_rt_tgsigqueueinfo, \
|
|
|
|
|
compat_sys_rt_tgsigqueueinfo)
|
|
|
|
|
#define __NR_perf_event_open 241
|
|
|
|
|
__SYSCALL(__NR_perf_event_open, sys_perf_event_open)
|
|
|
|
|
#define __NR_accept4 242
|
|
|
|
|
__SYSCALL(__NR_accept4, sys_accept4)
|
|
|
|
|
#define __NR_recvmmsg 243
|
|
|
|
|
__SC_COMP(__NR_recvmmsg, sys_recvmmsg, compat_sys_recvmmsg)
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Architectures may provide up to 16 syscalls of their own
|
|
|
|
|
* starting with this value.
|
|
|
|
|
*/
|
|
|
|
|
#define __NR_arch_specific_syscall 244
|
|
|
|
|
|
|
|
|
|
#define __NR_wait4 260
|
|
|
|
|
__SC_COMP(__NR_wait4, sys_wait4, compat_sys_wait4)
|
|
|
|
|
#define __NR_prlimit64 261
|
|
|
|
|
__SYSCALL(__NR_prlimit64, sys_prlimit64)
|
|
|
|
|
#define __NR_fanotify_init 262
|
|
|
|
|
__SYSCALL(__NR_fanotify_init, sys_fanotify_init)
|
|
|
|
|
#define __NR_fanotify_mark 263
|
|
|
|
|
__SYSCALL(__NR_fanotify_mark, sys_fanotify_mark)
|
|
|
|
|
#define __NR_name_to_handle_at 264
|
|
|
|
|
__SYSCALL(__NR_name_to_handle_at, sys_name_to_handle_at)
|
|
|
|
|
#define __NR_open_by_handle_at 265
|
|
|
|
|
__SC_COMP(__NR_open_by_handle_at, sys_open_by_handle_at, \
|
|
|
|
|
compat_sys_open_by_handle_at)
|
|
|
|
|
#define __NR_clock_adjtime 266
|
|
|
|
|
__SC_COMP(__NR_clock_adjtime, sys_clock_adjtime, compat_sys_clock_adjtime)
|
|
|
|
|
#define __NR_syncfs 267
|
|
|
|
|
__SYSCALL(__NR_syncfs, sys_syncfs)
|
|
|
|
|
#define __NR_setns 268
|
|
|
|
|
__SYSCALL(__NR_setns, sys_setns)
|
|
|
|
|
#define __NR_sendmmsg 269
|
|
|
|
|
__SC_COMP(__NR_sendmmsg, sys_sendmmsg, compat_sys_sendmmsg)
|
|
|
|
|
#define __NR_process_vm_readv 270
|
|
|
|
|
__SC_COMP(__NR_process_vm_readv, sys_process_vm_readv, \
|
|
|
|
|
compat_sys_process_vm_readv)
|
|
|
|
|
#define __NR_process_vm_writev 271
|
|
|
|
|
__SC_COMP(__NR_process_vm_writev, sys_process_vm_writev, \
|
|
|
|
|
compat_sys_process_vm_writev)
|
|
|
|
|
#define __NR_kcmp 272
|
|
|
|
|
__SYSCALL(__NR_kcmp, sys_kcmp)
|
2012-10-16 10:10:03 +08:00
|
|
|
#define __NR_finit_module 273
|
|
|
|
|
__SYSCALL(__NR_finit_module, sys_finit_module)
|
2014-02-03 23:33:37 +08:00
|
|
|
#define __NR_sched_setattr 274
|
|
|
|
|
__SYSCALL(__NR_sched_setattr, sys_sched_setattr)
|
|
|
|
|
#define __NR_sched_getattr 275
|
|
|
|
|
__SYSCALL(__NR_sched_getattr, sys_sched_getattr)
|
2014-04-23 18:08:05 +08:00
|
|
|
#define __NR_renameat2 276
|
|
|
|
|
__SYSCALL(__NR_renameat2, sys_renameat2)
|
2014-06-26 07:08:24 +08:00
|
|
|
#define __NR_seccomp 277
|
|
|
|
|
__SYSCALL(__NR_seccomp, sys_seccomp)
|
random: introduce getrandom(2) system call
The getrandom(2) system call was requested by the LibreSSL Portable
developers. It is analoguous to the getentropy(2) system call in
OpenBSD.
The rationale of this system call is to provide resiliance against
file descriptor exhaustion attacks, where the attacker consumes all
available file descriptors, forcing the use of the fallback code where
/dev/[u]random is not available. Since the fallback code is often not
well-tested, it is better to eliminate this potential failure mode
entirely.
The other feature provided by this new system call is the ability to
request randomness from the /dev/urandom entropy pool, but to block
until at least 128 bits of entropy has been accumulated in the
/dev/urandom entropy pool. Historically, the emphasis in the
/dev/urandom development has been to ensure that urandom pool is
initialized as quickly as possible after system boot, and preferably
before the init scripts start execution.
This is because changing /dev/urandom reads to block represents an
interface change that could potentially break userspace which is not
acceptable. In practice, on most x86 desktop and server systems, in
general the entropy pool can be initialized before it is needed (and
in modern kernels, we will printk a warning message if not). However,
on an embedded system, this may not be the case. And so with this new
interface, we can provide the functionality of blocking until the
urandom pool has been initialized. Any userspace program which uses
this new functionality must take care to assure that if it is used
during the boot process, that it will not cause the init scripts or
other portions of the system startup to hang indefinitely.
SYNOPSIS
#include <linux/random.h>
int getrandom(void *buf, size_t buflen, unsigned int flags);
DESCRIPTION
The system call getrandom() fills the buffer pointed to by buf
with up to buflen random bytes which can be used to seed user
space random number generators (i.e., DRBG's) or for other
cryptographic uses. It should not be used for Monte Carlo
simulations or other programs/algorithms which are doing
probabilistic sampling.
If the GRND_RANDOM flags bit is set, then draw from the
/dev/random pool instead of the /dev/urandom pool. The
/dev/random pool is limited based on the entropy that can be
obtained from environmental noise, so if there is insufficient
entropy, the requested number of bytes may not be returned.
If there is no entropy available at all, getrandom(2) will
either block, or return an error with errno set to EAGAIN if
the GRND_NONBLOCK bit is set in flags.
If the GRND_RANDOM bit is not set, then the /dev/urandom pool
will be used. Unlike using read(2) to fetch data from
/dev/urandom, if the urandom pool has not been sufficiently
initialized, getrandom(2) will block (or return -1 with the
errno set to EAGAIN if the GRND_NONBLOCK bit is set in flags).
The getentropy(2) system call in OpenBSD can be emulated using
the following function:
int getentropy(void *buf, size_t buflen)
{
int ret;
if (buflen > 256)
goto failure;
ret = getrandom(buf, buflen, 0);
if (ret < 0)
return ret;
if (ret == buflen)
return 0;
failure:
errno = EIO;
return -1;
}
RETURN VALUE
On success, the number of bytes that was filled in the buf is
returned. This may not be all the bytes requested by the
caller via buflen if insufficient entropy was present in the
/dev/random pool, or if the system call was interrupted by a
signal.
On error, -1 is returned, and errno is set appropriately.
ERRORS
EINVAL An invalid flag was passed to getrandom(2)
EFAULT buf is outside the accessible address space.
EAGAIN The requested entropy was not available, and
getentropy(2) would have blocked if the
GRND_NONBLOCK flag was not set.
EINTR While blocked waiting for entropy, the call was
interrupted by a signal handler; see the description
of how interrupted read(2) calls on "slow" devices
are handled with and without the SA_RESTART flag
in the signal(7) man page.
NOTES
For small requests (buflen <= 256) getrandom(2) will not
return EINTR when reading from the urandom pool once the
entropy pool has been initialized, and it will return all of
the bytes that have been requested. This is the recommended
way to use getrandom(2), and is designed for compatibility
with OpenBSD's getentropy() system call.
However, if you are using GRND_RANDOM, then getrandom(2) may
block until the entropy accounting determines that sufficient
environmental noise has been gathered such that getrandom(2)
will be operating as a NRBG instead of a DRBG for those people
who are working in the NIST SP 800-90 regime. Since it may
block for a long time, these guarantees do *not* apply. The
user may want to interrupt a hanging process using a signal,
so blocking until all of the requested bytes are returned
would be unfriendly.
For this reason, the user of getrandom(2) MUST always check
the return value, in case it returns some error, or if fewer
bytes than requested was returned. In the case of
!GRND_RANDOM and small request, the latter should never
happen, but the careful userspace code (and all crypto code
should be careful) should check for this anyway!
Finally, unless you are doing long-term key generation (and
perhaps not even then), you probably shouldn't be using
GRND_RANDOM. The cryptographic algorithms used for
/dev/urandom are quite conservative, and so should be
sufficient for all purposes. The disadvantage of GRND_RANDOM
is that it can block, and the increased complexity required to
deal with partially fulfilled getrandom(2) requests.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Zach Brown <zab@zabbo.net>
2014-07-17 16:13:05 +08:00
|
|
|
#define __NR_getrandom 278
|
|
|
|
|
__SYSCALL(__NR_getrandom, sys_getrandom)
|
2014-08-11 21:24:47 +08:00
|
|
|
#define __NR_memfd_create 279
|
|
|
|
|
__SYSCALL(__NR_memfd_create, sys_memfd_create)
|
2014-09-26 15:16:58 +08:00
|
|
|
#define __NR_bpf 280
|
|
|
|
|
__SYSCALL(__NR_bpf, sys_bpf)
|
syscalls: implement execveat() system call
This patchset adds execveat(2) for x86, and is derived from Meredydd
Luff's patch from Sept 2012 (https://lkml.org/lkml/2012/9/11/528).
The primary aim of adding an execveat syscall is to allow an
implementation of fexecve(3) that does not rely on the /proc filesystem,
at least for executables (rather than scripts). The current glibc version
of fexecve(3) is implemented via /proc, which causes problems in sandboxed
or otherwise restricted environments.
Given the desire for a /proc-free fexecve() implementation, HPA suggested
(https://lkml.org/lkml/2006/7/11/556) that an execveat(2) syscall would be
an appropriate generalization.
Also, having a new syscall means that it can take a flags argument without
back-compatibility concerns. The current implementation just defines the
AT_EMPTY_PATH and AT_SYMLINK_NOFOLLOW flags, but other flags could be
added in future -- for example, flags for new namespaces (as suggested at
https://lkml.org/lkml/2006/7/11/474).
Related history:
- https://lkml.org/lkml/2006/12/27/123 is an example of someone
realizing that fexecve() is likely to fail in a chroot environment.
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=514043 covered
documenting the /proc requirement of fexecve(3) in its manpage, to
"prevent other people from wasting their time".
- https://bugzilla.redhat.com/show_bug.cgi?id=241609 described a
problem where a process that did setuid() could not fexecve()
because it no longer had access to /proc/self/fd; this has since
been fixed.
This patch (of 4):
Add a new execveat(2) system call. execveat() is to execve() as openat()
is to open(): it takes a file descriptor that refers to a directory, and
resolves the filename relative to that.
In addition, if the filename is empty and AT_EMPTY_PATH is specified,
execveat() executes the file to which the file descriptor refers. This
replicates the functionality of fexecve(), which is a system call in other
UNIXen, but in Linux glibc it depends on opening "/proc/self/fd/<fd>" (and
so relies on /proc being mounted).
The filename fed to the executed program as argv[0] (or the name of the
script fed to a script interpreter) will be of the form "/dev/fd/<fd>"
(for an empty filename) or "/dev/fd/<fd>/<filename>", effectively
reflecting how the executable was found. This does however mean that
execution of a script in a /proc-less environment won't work; also, script
execution via an O_CLOEXEC file descriptor fails (as the file will not be
accessible after exec).
Based on patches by Meredydd Luff.
Signed-off-by: David Drysdale <drysdale@google.com>
Cc: Meredydd Luff <meredydd@senatehouse.org>
Cc: Shuah Khan <shuah.kh@samsung.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Rich Felker <dalias@aerifal.cx>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-12-13 08:57:29 +08:00
|
|
|
#define __NR_execveat 281
|
|
|
|
|
__SC_COMP(__NR_execveat, sys_execveat, compat_sys_execveat)
|
2015-09-23 05:59:09 +08:00
|
|
|
#define __NR_userfaultfd 282
|
|
|
|
|
__SYSCALL(__NR_userfaultfd, sys_userfaultfd)
|
|
|
|
|
#define __NR_membarrier 283
|
sys_membarrier(): system-wide memory barrier (generic, x86)
Here is an implementation of a new system call, sys_membarrier(), which
executes a memory barrier on all threads running on the system. It is
implemented by calling synchronize_sched(). It can be used to
distribute the cost of user-space memory barriers asymmetrically by
transforming pairs of memory barriers into pairs consisting of
sys_membarrier() and a compiler barrier. For synchronization primitives
that distinguish between read-side and write-side (e.g. userspace RCU
[1], rwlocks), the read-side can be accelerated significantly by moving
the bulk of the memory barrier overhead to the write-side.
The existing applications of which I am aware that would be improved by
this system call are as follows:
* Through Userspace RCU library (http://urcu.so)
- DNS server (Knot DNS) https://www.knot-dns.cz/
- Network sniffer (http://netsniff-ng.org/)
- Distributed object storage (https://sheepdog.github.io/sheepdog/)
- User-space tracing (http://lttng.org)
- Network storage system (https://www.gluster.org/)
- Virtual routers (https://events.linuxfoundation.org/sites/events/files/slides/DPDK_RCU_0MQ.pdf)
- Financial software (https://lkml.org/lkml/2015/3/23/189)
Those projects use RCU in userspace to increase read-side speed and
scalability compared to locking. Especially in the case of RCU used by
libraries, sys_membarrier can speed up the read-side by moving the bulk of
the memory barrier cost to synchronize_rcu().
* Direct users of sys_membarrier
- core dotnet garbage collector (https://github.com/dotnet/coreclr/issues/198)
Microsoft core dotnet GC developers are planning to use the mprotect()
side-effect of issuing memory barriers through IPIs as a way to implement
Windows FlushProcessWriteBuffers() on Linux. They are referring to
sys_membarrier in their github thread, specifically stating that
sys_membarrier() is what they are looking for.
To explain the benefit of this scheme, let's introduce two example threads:
Thread A (non-frequent, e.g. executing liburcu synchronize_rcu())
Thread B (frequent, e.g. executing liburcu
rcu_read_lock()/rcu_read_unlock())
In a scheme where all smp_mb() in thread A are ordering memory accesses
with respect to smp_mb() present in Thread B, we can change each
smp_mb() within Thread A into calls to sys_membarrier() and each
smp_mb() within Thread B into compiler barriers "barrier()".
Before the change, we had, for each smp_mb() pairs:
Thread A Thread B
previous mem accesses previous mem accesses
smp_mb() smp_mb()
following mem accesses following mem accesses
After the change, these pairs become:
Thread A Thread B
prev mem accesses prev mem accesses
sys_membarrier() barrier()
follow mem accesses follow mem accesses
As we can see, there are two possible scenarios: either Thread B memory
accesses do not happen concurrently with Thread A accesses (1), or they
do (2).
1) Non-concurrent Thread A vs Thread B accesses:
Thread A Thread B
prev mem accesses
sys_membarrier()
follow mem accesses
prev mem accesses
barrier()
follow mem accesses
In this case, thread B accesses will be weakly ordered. This is OK,
because at that point, thread A is not particularly interested in
ordering them with respect to its own accesses.
2) Concurrent Thread A vs Thread B accesses
Thread A Thread B
prev mem accesses prev mem accesses
sys_membarrier() barrier()
follow mem accesses follow mem accesses
In this case, thread B accesses, which are ensured to be in program
order thanks to the compiler barrier, will be "upgraded" to full
smp_mb() by synchronize_sched().
* Benchmarks
On Intel Xeon E5405 (8 cores)
(one thread is calling sys_membarrier, the other 7 threads are busy
looping)
1000 non-expedited sys_membarrier calls in 33s =3D 33 milliseconds/call.
* User-space user of this system call: Userspace RCU library
Both the signal-based and the sys_membarrier userspace RCU schemes
permit us to remove the memory barrier from the userspace RCU
rcu_read_lock() and rcu_read_unlock() primitives, thus significantly
accelerating them. These memory barriers are replaced by compiler
barriers on the read-side, and all matching memory barriers on the
write-side are turned into an invocation of a memory barrier on all
active threads in the process. By letting the kernel perform this
synchronization rather than dumbly sending a signal to every process
threads (as we currently do), we diminish the number of unnecessary wake
ups and only issue the memory barriers on active threads. Non-running
threads do not need to execute such barrier anyway, because these are
implied by the scheduler context switches.
Results in liburcu:
Operations in 10s, 6 readers, 2 writers:
memory barriers in reader: 1701557485 reads, 2202847 writes
signal-based scheme: 9830061167 reads, 6700 writes
sys_membarrier: 9952759104 reads, 425 writes
sys_membarrier (dyn. check): 7970328887 reads, 425 writes
The dynamic sys_membarrier availability check adds some overhead to
the read-side compared to the signal-based scheme, but besides that,
sys_membarrier slightly outperforms the signal-based scheme. However,
this non-expedited sys_membarrier implementation has a much slower grace
period than signal and memory barrier schemes.
Besides diminishing the number of wake-ups, one major advantage of the
membarrier system call over the signal-based scheme is that it does not
need to reserve a signal. This plays much more nicely with libraries,
and with processes injected into for tracing purposes, for which we
cannot expect that signals will be unused by the application.
An expedited version of this system call can be added later on to speed
up the grace period. Its implementation will likely depend on reading
the cpu_curr()->mm without holding each CPU's rq lock.
This patch adds the system call to x86 and to asm-generic.
[1] http://urcu.so
membarrier(2) man page:
MEMBARRIER(2) Linux Programmer's Manual MEMBARRIER(2)
NAME
membarrier - issue memory barriers on a set of threads
SYNOPSIS
#include <linux/membarrier.h>
int membarrier(int cmd, int flags);
DESCRIPTION
The cmd argument is one of the following:
MEMBARRIER_CMD_QUERY
Query the set of supported commands. It returns a bitmask of
supported commands.
MEMBARRIER_CMD_SHARED
Execute a memory barrier on all threads running on the system.
Upon return from system call, the caller thread is ensured that
all running threads have passed through a state where all memory
accesses to user-space addresses match program order between
entry to and return from the system call (non-running threads
are de facto in such a state). This covers threads from all pro=E2=80=90
cesses running on the system. This command returns 0.
The flags argument needs to be 0. For future extensions.
All memory accesses performed in program order from each targeted
thread is guaranteed to be ordered with respect to sys_membarrier(). If
we use the semantic "barrier()" to represent a compiler barrier forcing
memory accesses to be performed in program order across the barrier,
and smp_mb() to represent explicit memory barriers forcing full memory
ordering across the barrier, we have the following ordering table for
each pair of barrier(), sys_membarrier() and smp_mb():
The pair ordering is detailed as (O: ordered, X: not ordered):
barrier() smp_mb() sys_membarrier()
barrier() X X O
smp_mb() X O O
sys_membarrier() O O O
RETURN VALUE
On success, these system calls return zero. On error, -1 is returned,
and errno is set appropriately. For a given command, with flags
argument set to 0, this system call is guaranteed to always return the
same value until reboot.
ERRORS
ENOSYS System call is not implemented.
EINVAL Invalid arguments.
Linux 2015-04-15 MEMBARRIER(2)
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Nicholas Miell <nmiell@comcast.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Pranith Kumar <bobby.prani@gmail.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-12 04:07:39 +08:00
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__SYSCALL(__NR_membarrier, sys_membarrier)
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2015-11-06 10:51:33 +08:00
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#define __NR_mlock2 284
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__SYSCALL(__NR_mlock2, sys_mlock2)
|
2015-11-11 05:53:30 +08:00
|
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#define __NR_copy_file_range 285
|
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__SYSCALL(__NR_copy_file_range, sys_copy_file_range)
|
2016-04-11 17:17:46 +08:00
|
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#define __NR_preadv2 286
|
2016-05-03 00:12:47 +08:00
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__SC_COMP(__NR_preadv2, sys_preadv2, compat_sys_preadv2)
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2016-04-11 17:17:46 +08:00
|
|
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#define __NR_pwritev2 287
|
2016-05-03 00:12:47 +08:00
|
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__SC_COMP(__NR_pwritev2, sys_pwritev2, compat_sys_pwritev2)
|
2016-07-30 00:30:18 +08:00
|
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#define __NR_pkey_mprotect 288
|
|
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__SYSCALL(__NR_pkey_mprotect, sys_pkey_mprotect)
|
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#define __NR_pkey_alloc 289
|
|
|
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|
__SYSCALL(__NR_pkey_alloc, sys_pkey_alloc)
|
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#define __NR_pkey_free 290
|
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__SYSCALL(__NR_pkey_free, sys_pkey_free)
|
2017-03-13 22:45:21 +08:00
|
|
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#define __NR_statx 291
|
|
|
|
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__SYSCALL(__NR_statx, sys_statx)
|
aio: implement io_pgetevents
This is the io_getevents equivalent of ppoll/pselect and allows to
properly mix signals and aio completions (especially with IOCB_CMD_POLL)
and atomically executes the following sequence:
sigset_t origmask;
pthread_sigmask(SIG_SETMASK, &sigmask, &origmask);
ret = io_getevents(ctx, min_nr, nr, events, timeout);
pthread_sigmask(SIG_SETMASK, &origmask, NULL);
Note that unlike many other signal related calls we do not pass a sigmask
size, as that would get us to 7 arguments, which aren't easily supported
by the syscall infrastructure. It seems a lot less painful to just add a
new syscall variant in the unlikely case we're going to increase the
sigset size.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-05-03 01:51:00 +08:00
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#define __NR_io_pgetevents 292
|
|
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__SC_COMP(__NR_io_pgetevents, sys_io_pgetevents, compat_sys_io_pgetevents)
|
2012-10-05 01:20:15 +08:00
|
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#undef __NR_syscalls
|
aio: implement io_pgetevents
This is the io_getevents equivalent of ppoll/pselect and allows to
properly mix signals and aio completions (especially with IOCB_CMD_POLL)
and atomically executes the following sequence:
sigset_t origmask;
pthread_sigmask(SIG_SETMASK, &sigmask, &origmask);
ret = io_getevents(ctx, min_nr, nr, events, timeout);
pthread_sigmask(SIG_SETMASK, &origmask, NULL);
Note that unlike many other signal related calls we do not pass a sigmask
size, as that would get us to 7 arguments, which aren't easily supported
by the syscall infrastructure. It seems a lot less painful to just add a
new syscall variant in the unlikely case we're going to increase the
sigset size.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-05-03 01:51:00 +08:00
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#define __NR_syscalls 293
|
2012-10-05 01:20:15 +08:00
|
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/*
|
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|
* 32 bit systems traditionally used different
|
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* syscalls for off_t and loff_t arguments, while
|
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* 64 bit systems only need the off_t version.
|
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* For new 32 bit platforms, there is no need to
|
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* implement the old 32 bit off_t syscalls, so
|
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* they take different names.
|
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* Here we map the numbers so that both versions
|
|
|
|
|
* use the same syscall table layout.
|
|
|
|
|
*/
|
|
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#if __BITS_PER_LONG == 64 && !defined(__SYSCALL_COMPAT)
|
|
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|
|
#define __NR_fcntl __NR3264_fcntl
|
|
|
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|
#define __NR_statfs __NR3264_statfs
|
|
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#define __NR_fstatfs __NR3264_fstatfs
|
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#define __NR_truncate __NR3264_truncate
|
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#define __NR_ftruncate __NR3264_ftruncate
|
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#define __NR_lseek __NR3264_lseek
|
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#define __NR_sendfile __NR3264_sendfile
|
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#define __NR_newfstatat __NR3264_fstatat
|
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#define __NR_fstat __NR3264_fstat
|
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#define __NR_mmap __NR3264_mmap
|
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#define __NR_fadvise64 __NR3264_fadvise64
|
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#ifdef __NR3264_stat
|
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#define __NR_stat __NR3264_stat
|
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#define __NR_lstat __NR3264_lstat
|
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|
|
|
#endif
|
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|
|
#else
|
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|
|
|
#define __NR_fcntl64 __NR3264_fcntl
|
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|
#define __NR_statfs64 __NR3264_statfs
|
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|
#define __NR_fstatfs64 __NR3264_fstatfs
|
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|
|
|
#define __NR_truncate64 __NR3264_truncate
|
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|
#define __NR_ftruncate64 __NR3264_ftruncate
|
|
|
|
|
#define __NR_llseek __NR3264_lseek
|
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|
#define __NR_sendfile64 __NR3264_sendfile
|
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#define __NR_fstatat64 __NR3264_fstatat
|
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#define __NR_fstat64 __NR3264_fstat
|
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|
#define __NR_mmap2 __NR3264_mmap
|
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|
|
|
#define __NR_fadvise64_64 __NR3264_fadvise64
|
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|
|
#ifdef __NR3264_stat
|
|
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#define __NR_stat64 __NR3264_stat
|
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#define __NR_lstat64 __NR3264_lstat
|
|
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|
#endif
|
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|
#endif
|