system_call


term

system call


system call[システムコール]

カーネルが提供する機能呼び出し。
linux-2.6.14-rc4、i386には 293 のシステムコールがありまつ。
entry.Sからシステムコールテーブルを参照し、kernel内のsys_open等に
やってくるわけでつ。

linux-2.6.14-rc4/arch/i386/kernel/syscall_table.S

ENTRY(sys_call_table)
       .long sys_restart_syscall       /* 0 - old "setup()" system call, used for restarting */
       .long sys_exit
       .long sys_fork
       .long sys_read
       .long sys_write
       .long sys_open          /* 5 */
       .long sys_close
       .long sys_waitpid
       .long sys_creat
       .long sys_link
       .long sys_unlink        /* 10 */
       .long sys_execve
       .long sys_chdir
       .long sys_time
       .long sys_mknod
       .long sys_chmod         /* 15 */
       .long sys_lchown16
       .long sys_ni_syscall    /* old break syscall holder */
       .long sys_stat
       .long sys_lseek
       .long sys_getpid        /* 20 */
       .long sys_mount
       .long sys_oldumount
       .long sys_setuid16
       .long sys_getuid16
       .long sys_stime         /* 25 */
       .long sys_ptrace
       .long sys_alarm
       .long sys_fstat
       .long sys_pause
       .long sys_utime         /* 30 */
       .long sys_ni_syscall    /* old stty syscall holder */
       .long sys_ni_syscall    /* old gtty syscall holder */
       .long sys_access
       .long sys_nice
       .long sys_ni_syscall    /* 35 - old ftime syscall holder */
       .long sys_sync
       .long sys_kill
       .long sys_rename
       .long sys_mkdir
       .long sys_rmdir         /* 40 */
       .long sys_dup
       .long sys_pipe
       .long sys_times
       .long sys_ni_syscall    /* old prof syscall holder */
       .long sys_brk           /* 45 */
       .long sys_setgid16
       .long sys_getgid16
       .long sys_signal
       .long sys_geteuid16
       .long sys_getegid16     /* 50 */
       .long sys_acct
       .long sys_umount        /* recycled never used phys() */
       .long sys_ni_syscall    /* old lock syscall holder */
       .long sys_ioctl
       .long sys_fcntl         /* 55 */
       .long sys_ni_syscall    /* old mpx syscall holder */
       .long sys_setpgid
       .long sys_ni_syscall    /* old ulimit syscall holder */
       .long sys_olduname
       .long sys_umask         /* 60 */
       .long sys_chroot
       .long sys_ustat
       .long sys_dup2
       .long sys_getppid
       .long sys_getpgrp       /* 65 */
       .long sys_setsid
       .long sys_sigaction
       .long sys_sgetmask
       .long sys_ssetmask
       .long sys_setreuid16    /* 70 */
       .long sys_setregid16
       .long sys_sigsuspend
       .long sys_sigpending
       .long sys_sethostname
       .long sys_setrlimit     /* 75 */
       .long sys_old_getrlimit
       .long sys_getrusage
       .long sys_gettimeofday
       .long sys_settimeofday
       .long sys_getgroups16   /* 80 */
       .long sys_setgroups16
       .long old_select
       .long sys_symlink
       .long sys_lstat
       .long sys_readlink      /* 85 */
       .long sys_uselib
       .long sys_swapon
       .long sys_reboot
       .long old_readdir
       .long old_mmap          /* 90 */
       .long sys_munmap
       .long sys_truncate
       .long sys_ftruncate
       .long sys_fchmod
       .long sys_fchown16      /* 95 */
       .long sys_getpriority
       .long sys_setpriority
       .long sys_ni_syscall    /* old profil syscall holder */
       .long sys_statfs
       .long sys_fstatfs       /* 100 */
       .long sys_ioperm
       .long sys_socketcall
       .long sys_syslog
       .long sys_setitimer
       .long sys_getitimer     /* 105 */
       .long sys_newstat
       .long sys_newlstat
       .long sys_newfstat
       .long sys_uname
       .long sys_iopl          /* 110 */
       .long sys_vhangup
       .long sys_ni_syscall    /* old "idle" system call */
       .long sys_vm86old
       .long sys_wait4
       .long sys_swapoff       /* 115 */
       .long sys_sysinfo
       .long sys_ipc
       .long sys_fsync
       .long sys_sigreturn
       .long sys_clone         /* 120 */
       .long sys_setdomainname
       .long sys_newuname
       .long sys_modify_ldt
       .long sys_adjtimex
       .long sys_mprotect      /* 125 */
       .long sys_sigprocmask
       .long sys_ni_syscall    /* old "create_module" */
       .long sys_init_module
       .long sys_delete_module
       .long sys_ni_syscall    /* 130: old "get_kernel_syms" */
       .long sys_quotactl
       .long sys_getpgid
       .long sys_fchdir
       .long sys_bdflush
       .long sys_sysfs         /* 135 */
       .long sys_personality
       .long sys_ni_syscall    /* reserved for afs_syscall */
       .long sys_setfsuid16
       .long sys_setfsgid16
       .long sys_llseek        /* 140 */
       .long sys_getdents
       .long sys_select
       .long sys_flock
       .long sys_msync
       .long sys_readv         /* 145 */
       .long sys_writev
       .long sys_getsid
       .long sys_fdatasync
       .long sys_sysctl
       .long sys_mlock         /* 150 */
       .long sys_munlock
       .long sys_mlockall
       .long sys_munlockall
       .long sys_sched_setparam
       .long sys_sched_getparam   /* 155 */
       .long sys_sched_setscheduler
       .long sys_sched_getscheduler
       .long sys_sched_yield
       .long sys_sched_get_priority_max
       .long sys_sched_get_priority_min  /* 160 */
       .long sys_sched_rr_get_interval
       .long sys_nanosleep
       .long sys_mremap
       .long sys_setresuid16
       .long sys_getresuid16   /* 165 */
       .long sys_vm86
       .long sys_ni_syscall    /* Old sys_query_module */
       .long sys_poll
       .long sys_nfsservctl
       .long sys_setresgid16   /* 170 */
       .long sys_getresgid16
       .long sys_prctl
       .long sys_rt_sigreturn
       .long sys_rt_sigaction
       .long sys_rt_sigprocmask        /* 175 */
       .long sys_rt_sigpending
       .long sys_rt_sigtimedwait
       .long sys_rt_sigqueueinfo
       .long sys_rt_sigsuspend
       .long sys_pread64       /* 180 */
       .long sys_pwrite64
       .long sys_chown16
       .long sys_getcwd
       .long sys_capget
       .long sys_capset        /* 185 */
       .long sys_sigaltstack
       .long sys_sendfile
       .long sys_ni_syscall    /* reserved for streams1 */
       .long sys_ni_syscall    /* reserved for streams2 */
       .long sys_vfork         /* 190 */
       .long sys_getrlimit
       .long sys_mmap2
       .long sys_truncate64
       .long sys_ftruncate64
       .long sys_stat64        /* 195 */
       .long sys_lstat64
       .long sys_fstat64
       .long sys_lchown
       .long sys_getuid
       .long sys_getgid        /* 200 */
       .long sys_geteuid
       .long sys_getegid
       .long sys_setreuid
       .long sys_setregid
       .long sys_getgroups     /* 205 */
       .long sys_setgroups
       .long sys_fchown
       .long sys_setresuid
       .long sys_getresuid
       .long sys_setresgid     /* 210 */
       .long sys_getresgid
       .long sys_chown
       .long sys_setuid
       .long sys_setgid
       .long sys_setfsuid      /* 215 */
       .long sys_setfsgid
       .long sys_pivot_root
       .long sys_mincore
       .long sys_madvise
       .long sys_getdents64    /* 220 */
       .long sys_fcntl64
       .long sys_ni_syscall    /* reserved for TUX */
       .long sys_ni_syscall
       .long sys_gettid
       .long sys_readahead     /* 225 */
       .long sys_setxattr
       .long sys_lsetxattr
       .long sys_fsetxattr
       .long sys_getxattr
       .long sys_lgetxattr     /* 230 */
       .long sys_fgetxattr
       .long sys_listxattr
       .long sys_llistxattr
       .long sys_flistxattr
       .long sys_removexattr   /* 235 */
       .long sys_lremovexattr
       .long sys_fremovexattr
       .long sys_tkill
       .long sys_sendfile64
       .long sys_futex         /* 240 */
       .long sys_sched_setaffinity
       .long sys_sched_getaffinity
       .long sys_set_thread_area
       .long sys_get_thread_area
       .long sys_io_setup      /* 245 */
       .long sys_io_destroy
       .long sys_io_getevents
       .long sys_io_submit
       .long sys_io_cancel
       .long sys_fadvise64     /* 250 */
       .long sys_ni_syscall
       .long sys_exit_group
       .long sys_lookup_dcookie
       .long sys_epoll_create
       .long sys_epoll_ctl     /* 255 */
       .long sys_epoll_wait
       .long sys_remap_file_pages
       .long sys_set_tid_address
       .long sys_timer_create
       .long sys_timer_settime         /* 260 */
       .long sys_timer_gettime
       .long sys_timer_getoverrun
       .long sys_timer_delete
       .long sys_clock_settime
       .long sys_clock_gettime         /* 265 */
       .long sys_clock_getres
       .long sys_clock_nanosleep
       .long sys_statfs64
       .long sys_fstatfs64
       .long sys_tgkill        /* 270 */
       .long sys_utimes
       .long sys_fadvise64_64
       .long sys_ni_syscall    /* sys_vserver */
       .long sys_mbind
       .long sys_get_mempolicy
       .long sys_set_mempolicy
       .long sys_mq_open
       .long sys_mq_unlink
       .long sys_mq_timedsend
       .long sys_mq_timedreceive       /* 280 */
       .long sys_mq_notify
       .long sys_mq_getsetattr
       .long sys_kexec_load
       .long sys_waitid
       .long sys_ni_syscall            /* 285 */ /* available */
       .long sys_add_key
       .long sys_request_key
       .long sys_keyctl
       .long sys_ioprio_set
       .long sys_ioprio_get            /* 290 */
       .long sys_inotify_init
       .long sys_inotify_add_watch
       .long sys_inotify_rm_watch

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