| blob | 68fcab8f8f6f5eadebd5a18715034d6b33c8d781 |
1 ###############################################################################
2 #
3 # MN10300 Exception and interrupt entry points
4 #
5 # Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
6 # Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
7 # Modified by David Howells (dhowells@redhat.com)
8 #
9 # This program is free software; you can redistribute it and/or
10 # modify it under the terms of the GNU General Public Licence
11 # as published by the Free Software Foundation; either version
12 # 2 of the Licence, or (at your option) any later version.
13 #
14 ###############################################################################
15 #include <linux/sys.h>
16 #include <linux/linkage.h>
17 #include <asm/smp.h>
18 #include <asm/irqflags.h>
19 #include <asm/thread_info.h>
20 #include <asm/intctl-regs.h>
21 #include <asm/busctl-regs.h>
22 #include <asm/timer-regs.h>
23 #include <unit/leds.h>
24 #include <asm/page.h>
25 #include <asm/pgtable.h>
26 #include <asm/errno.h>
27 #include <asm/asm-offsets.h>
28 #include <asm/frame.inc>
30 #if defined(CONFIG_SMP) && defined(CONFIG_GDBSTUB)
31 #include <asm/gdb-stub.h>
32 #endif /* CONFIG_SMP && CONFIG_GDBSTUB */
34 #ifdef CONFIG_PREEMPT
35 #define preempt_stop LOCAL_IRQ_DISABLE
36 #else
37 #define preempt_stop
38 #define resume_kernel restore_all
39 #endif
41 .am33_2
43 ###############################################################################
44 #
45 # the return path for a forked child
46 # - on entry, D0 holds the address of the previous task to run
47 #
48 ###############################################################################
49 ENTRY(ret_from_fork)
50 call schedule_tail[],0
51 GET_THREAD_INFO a2
53 # return 0 to indicate child process
54 clr d0
55 mov d0,(REG_D0,fp)
56 jmp syscall_exit
58 ENTRY(ret_from_kernel_thread)
59 call schedule_tail[],0
60 mov (REG_D0,fp),d0
61 mov (REG_A0,fp),a0
62 calls (a0)
63 clr d0
64 mov d0,(REG_D0,fp)
65 jmp syscall_exit
67 ###############################################################################
68 #
69 # system call handler
70 #
71 ###############################################################################
72 ENTRY(system_call)
73 add -4,sp
74 SAVE_ALL
75 mov d0,(REG_ORIG_D0,fp)
76 GET_THREAD_INFO a2
77 cmp nr_syscalls,d0
78 bcc syscall_badsys
79 btst _TIF_SYSCALL_TRACE,(TI_flags,a2)
80 bne syscall_entry_trace
81 syscall_call:
82 add d0,d0,a1
83 add a1,a1
84 mov (REG_A0,fp),d0
85 mov (sys_call_table,a1),a0
86 calls (a0)
87 mov d0,(REG_D0,fp)
88 syscall_exit:
89 # make sure we don't miss an interrupt setting need_resched or
90 # sigpending between sampling and the rti
91 LOCAL_IRQ_DISABLE
92 mov (TI_flags,a2),d2
93 btst _TIF_ALLWORK_MASK,d2
94 bne syscall_exit_work
95 restore_all:
96 RESTORE_ALL
98 ###############################################################################
99 #
100 # perform work that needs to be done immediately before resumption and syscall
101 # tracing
102 #
103 ###############################################################################
104 ALIGN
105 syscall_exit_work:
106 mov (REG_EPSW,fp),d0
107 and EPSW_nSL,d0
108 beq resume_kernel # returning to supervisor mode
110 btst _TIF_SYSCALL_TRACE,d2
111 beq work_pending
112 LOCAL_IRQ_ENABLE # could let syscall_trace_exit() call
113 # schedule() instead
114 mov fp,d0
115 call syscall_trace_exit[],0 # do_syscall_trace(regs)
116 jmp resume_userspace
118 ALIGN
119 work_pending:
120 btst _TIF_NEED_RESCHED,d2
121 beq work_notifysig
123 work_resched:
124 call schedule[],0
126 # make sure we don't miss an interrupt setting need_resched or
127 # sigpending between sampling and the rti
128 LOCAL_IRQ_DISABLE
130 # is there any work to be done other than syscall tracing?
131 mov (TI_flags,a2),d2
132 btst _TIF_WORK_MASK,d2
133 beq restore_all
134 btst _TIF_NEED_RESCHED,d2
135 bne work_resched
137 # deal with pending signals and notify-resume requests
138 work_notifysig:
139 mov fp,d0
140 mov d2,d1
141 call do_notify_resume[],0
142 jmp resume_userspace
144 # perform syscall entry tracing
145 syscall_entry_trace:
146 mov -ENOSYS,d0
147 mov d0,(REG_D0,fp)
148 mov fp,d0
149 call syscall_trace_entry[],0 # returns the syscall number to actually use
150 mov (REG_D1,fp),d1
151 cmp nr_syscalls,d0
152 bcs syscall_call
153 jmp syscall_exit
155 syscall_badsys:
156 mov -ENOSYS,d0
157 mov d0,(REG_D0,fp)
158 jmp resume_userspace
160 # userspace resumption stub bypassing syscall exit tracing
161 .globl ret_from_exception, ret_from_intr
162 ALIGN
163 ret_from_exception:
164 preempt_stop
165 ret_from_intr:
166 GET_THREAD_INFO a2
167 mov (REG_EPSW,fp),d0 # need to deliver signals before
168 # returning to userspace
169 and EPSW_nSL,d0
170 beq resume_kernel # returning to supervisor mode
172 ENTRY(resume_userspace)
173 # make sure we don't miss an interrupt setting need_resched or
174 # sigpending between sampling and the rti
175 LOCAL_IRQ_DISABLE
177 # is there any work to be done on int/exception return?
178 mov (TI_flags,a2),d2
179 btst _TIF_WORK_MASK,d2
180 bne work_pending
181 jmp restore_all
183 #ifdef CONFIG_PREEMPT
184 ENTRY(resume_kernel)
185 LOCAL_IRQ_DISABLE
186 mov (TI_preempt_count,a2),d0 # non-zero preempt_count ?
187 cmp 0,d0
188 bne restore_all
190 need_resched:
191 btst _TIF_NEED_RESCHED,(TI_flags,a2)
192 beq restore_all
193 mov (REG_EPSW,fp),d0
194 and EPSW_IM,d0
195 cmp EPSW_IM_7,d0 # interrupts off (exception path) ?
196 bne restore_all
197 call preempt_schedule_irq[],0
198 jmp need_resched
199 #endif
202 ###############################################################################
203 #
204 # IRQ handler entry point
205 # - intended to be entered at multiple priorities
206 #
207 ###############################################################################
208 ENTRY(irq_handler)
209 add -4,sp
210 SAVE_ALL
212 # it's not a syscall
213 mov 0xffffffff,d0
214 mov d0,(REG_ORIG_D0,fp)
216 mov fp,d0
217 call do_IRQ[],0 # do_IRQ(regs)
219 jmp ret_from_intr
221 ###############################################################################
222 #
223 # Double Fault handler entry point
224 # - note that there will not be a stack, D0/A0 will hold EPSW/PC as were
225 #
226 ###############################################################################
227 .section .bss
228 .balign THREAD_SIZE
229 .space THREAD_SIZE
230 __df_stack:
231 .previous
233 ENTRY(double_fault)
234 mov a0,(__df_stack-4) # PC as was
235 mov d0,(__df_stack-8) # EPSW as was
236 mn10300_set_dbfleds # display 'db-f' on the LEDs
237 mov 0xaa55aa55,d0
238 mov d0,(__df_stack-12) # no ORIG_D0
239 mov sp,a0 # save corrupted SP
240 mov __df_stack-12,sp # emergency supervisor stack
241 SAVE_ALL
242 mov a0,(REG_A0,fp) # save corrupted SP as A0 (which got
243 # clobbered by the CPU)
244 mov fp,d0
245 calls do_double_fault
246 double_fault_loop:
247 bra double_fault_loop
249 ###############################################################################
250 #
251 # Bus Error handler entry point
252 # - handle external (async) bus errors separately
253 #
254 ###############################################################################
255 ENTRY(raw_bus_error)
256 add -4,sp
257 mov d0,(sp)
258 #if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR)
259 mov (MMUCTR),d0
260 mov d0,(MMUCTR)
261 #endif
262 mov (BCBERR),d0 # what
263 btst BCBERR_BEMR_DMA,d0 # see if it was an external bus error
264 beq __common_exception_aux # it wasn't
266 SAVE_ALL
267 mov (BCBEAR),d1 # destination of erroneous access
269 mov (REG_ORIG_D0,fp),d2
270 mov d2,(REG_D0,fp)
271 mov -1,d2
272 mov d2,(REG_ORIG_D0,fp)
274 add -4,sp
275 mov fp,(12,sp) # frame pointer
276 call io_bus_error[],0
277 jmp restore_all
279 ###############################################################################
280 #
281 # NMI exception entry points
282 #
283 # This is used by ordinary interrupt channels that have the GxICR_NMI bit set
284 # in addition to the main NMI and Watchdog channels. SMP NMI IPIs use this
285 # facility.
286 #
287 ###############################################################################
288 ENTRY(nmi_handler)
289 add -4,sp
290 mov d0,(sp)
291 mov (TBR),d0
293 #ifdef CONFIG_SMP
294 add -4,sp
295 mov d0,(sp) # save d0(TBR)
296 movhu (NMIAGR),d0
297 and NMIAGR_GN,d0
298 lsr 0x2,d0
299 cmp CALL_FUNCTION_NMI_IPI,d0
300 bne nmi_not_smp_callfunc # if not call function, jump
302 # function call nmi ipi
303 add 4,sp # no need to store TBR
304 mov GxICR_DETECT,d0 # clear NMI request
305 movbu d0,(GxICR(CALL_FUNCTION_NMI_IPI))
306 movhu (GxICR(CALL_FUNCTION_NMI_IPI)),d0
307 and ~EPSW_NMID,epsw # enable NMI
309 mov (sp),d0 # restore d0
310 SAVE_ALL
311 call smp_nmi_call_function_interrupt[],0
312 RESTORE_ALL
314 nmi_not_smp_callfunc:
315 #ifdef CONFIG_KERNEL_DEBUGGER
316 cmp DEBUGGER_NMI_IPI,d0
317 bne nmi_not_debugger # if not kernel debugger NMI IPI, jump
319 # kernel debugger NMI IPI
320 add 4,sp # no need to store TBR
321 mov GxICR_DETECT,d0 # clear NMI
322 movbu d0,(GxICR(DEBUGGER_NMI_IPI))
323 movhu (GxICR(DEBUGGER_NMI_IPI)),d0
324 and ~EPSW_NMID,epsw # enable NMI
326 mov (sp),d0
327 SAVE_ALL
328 mov fp,d0 # arg 0: stacked register file
329 mov a2,d1 # arg 1: exception number
330 call debugger_nmi_interrupt[],0
331 RESTORE_ALL
333 nmi_not_debugger:
334 #endif /* CONFIG_KERNEL_DEBUGGER */
335 mov (sp),d0 # restore TBR to d0
336 add 4,sp
337 #endif /* CONFIG_SMP */
339 bra __common_exception_nonmi
341 ###############################################################################
342 #
343 # General exception entry point
344 #
345 ###############################################################################
346 ENTRY(__common_exception)
347 add -4,sp
348 mov d0,(sp)
349 #if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR)
350 mov (MMUCTR),d0
351 mov d0,(MMUCTR)
352 #endif
354 __common_exception_aux:
355 mov (TBR),d0
356 and ~EPSW_NMID,epsw # turn NMIs back on if not NMI
357 or EPSW_IE,epsw
359 __common_exception_nonmi:
360 and 0x0000FFFF,d0 # turn the exception code into a vector
361 # table index
363 btst 0x00000007,d0
364 bne 1f
365 cmp 0x00000400,d0
366 bge 1f
368 SAVE_ALL # build the stack frame
370 mov (REG_D0,fp),a2 # get the exception number
371 mov (REG_ORIG_D0,fp),d0
372 mov d0,(REG_D0,fp)
373 mov -1,d0
374 mov d0,(REG_ORIG_D0,fp)
376 #ifdef CONFIG_GDBSTUB
377 #ifdef CONFIG_SMP
378 call gdbstub_busy_check[],0
379 and d0,d0 # check return value
380 beq 2f
381 #else /* CONFIG_SMP */
382 btst 0x01,(gdbstub_busy)
383 beq 2f
384 #endif /* CONFIG_SMP */
385 and ~EPSW_IE,epsw
386 mov fp,d0
387 mov a2,d1
388 call gdbstub_exception[],0 # gdbstub itself caused an exception
389 bra restore_all
390 2:
391 #endif /* CONFIG_GDBSTUB */
393 mov fp,d0 # arg 0: stacked register file
394 mov a2,d1 # arg 1: exception number
395 lsr 1,a2
397 mov (exception_table,a2),a2
398 calls (a2)
399 jmp ret_from_exception
401 1: pi # BUG() equivalent
403 ###############################################################################
404 #
405 # Exception handler functions table
406 #
407 ###############################################################################
408 .data
409 ENTRY(exception_table)
410 .rept 0x400>>1
411 .long uninitialised_exception
412 .endr
413 .previous
415 ###############################################################################
416 #
417 # Change an entry in the exception table
418 # - D0 exception code, D1 handler
419 #
420 ###############################################################################
421 ENTRY(set_excp_vector)
422 lsr 1,d0
423 add exception_table,d0
424 mov d1,(d0)
425 mov 4,d1
426 ret [],0
428 ###############################################################################
429 #
430 # System call table
431 #
432 ###############################################################################
433 .data
434 ENTRY(sys_call_table)
435 .long sys_restart_syscall /* 0 */
436 .long sys_exit
437 .long sys_fork
438 .long sys_read
439 .long sys_write
440 .long sys_open /* 5 */
441 .long sys_close
442 .long sys_waitpid
443 .long sys_creat
444 .long sys_link
445 .long sys_unlink /* 10 */
446 .long sys_execve
447 .long sys_chdir
448 .long sys_time
449 .long sys_mknod
450 .long sys_chmod /* 15 */
451 .long sys_lchown16
452 .long sys_ni_syscall /* old break syscall holder */
453 .long sys_stat
454 .long sys_lseek
455 .long sys_getpid /* 20 */
456 .long sys_mount
457 .long sys_oldumount
458 .long sys_setuid16
459 .long sys_getuid16
460 .long sys_stime /* 25 */
461 .long sys_ptrace
462 .long sys_alarm
463 .long sys_fstat
464 .long sys_pause
465 .long sys_utime /* 30 */
466 .long sys_ni_syscall /* old stty syscall holder */
467 .long sys_ni_syscall /* old gtty syscall holder */
468 .long sys_access
469 .long sys_nice
470 .long sys_ni_syscall /* 35 - old ftime syscall holder */
471 .long sys_sync
472 .long sys_kill
473 .long sys_rename
474 .long sys_mkdir
475 .long sys_rmdir /* 40 */
476 .long sys_dup
477 .long sys_pipe
478 .long sys_times
479 .long sys_ni_syscall /* old prof syscall holder */
480 .long sys_brk /* 45 */
481 .long sys_setgid16
482 .long sys_getgid16
483 .long sys_signal
484 .long sys_geteuid16
485 .long sys_getegid16 /* 50 */
486 .long sys_acct
487 .long sys_umount /* recycled never used phys() */
488 .long sys_ni_syscall /* old lock syscall holder */
489 .long sys_ioctl
490 .long sys_fcntl /* 55 */
491 .long sys_ni_syscall /* old mpx syscall holder */
492 .long sys_setpgid
493 .long sys_ni_syscall /* old ulimit syscall holder */
494 .long sys_ni_syscall /* old sys_olduname */
495 .long sys_umask /* 60 */
496 .long sys_chroot
497 .long sys_ustat
498 .long sys_dup2
499 .long sys_getppid
500 .long sys_getpgrp /* 65 */
501 .long sys_setsid
502 .long sys_sigaction
503 .long sys_sgetmask
504 .long sys_ssetmask
505 .long sys_setreuid16 /* 70 */
506 .long sys_setregid16
507 .long sys_sigsuspend
508 .long sys_sigpending
509 .long sys_sethostname
510 .long sys_setrlimit /* 75 */
511 .long sys_old_getrlimit
512 .long sys_getrusage
513 .long sys_gettimeofday
514 .long sys_settimeofday
515 .long sys_getgroups16 /* 80 */
516 .long sys_setgroups16
517 .long sys_old_select
518 .long sys_symlink
519 .long sys_lstat
520 .long sys_readlink /* 85 */
521 .long sys_uselib
522 .long sys_swapon
523 .long sys_reboot
524 .long sys_old_readdir
525 .long old_mmap /* 90 */
526 .long sys_munmap
527 .long sys_truncate
528 .long sys_ftruncate
529 .long sys_fchmod
530 .long sys_fchown16 /* 95 */
531 .long sys_getpriority
532 .long sys_setpriority
533 .long sys_ni_syscall /* old profil syscall holder */
534 .long sys_statfs
535 .long sys_fstatfs /* 100 */
536 .long sys_ni_syscall /* ioperm */
537 .long sys_socketcall
538 .long sys_syslog
539 .long sys_setitimer
540 .long sys_getitimer /* 105 */
541 .long sys_newstat
542 .long sys_newlstat
543 .long sys_newfstat
544 .long sys_ni_syscall /* old sys_uname */
545 .long sys_ni_syscall /* 110 - iopl */
546 .long sys_vhangup
547 .long sys_ni_syscall /* old "idle" system call */
548 .long sys_ni_syscall /* vm86old */
549 .long sys_wait4
550 .long sys_swapoff /* 115 */
551 .long sys_sysinfo
552 .long sys_ipc
553 .long sys_fsync
554 .long sys_sigreturn
555 .long sys_clone /* 120 */
556 .long sys_setdomainname
557 .long sys_newuname
558 .long sys_ni_syscall /* modify_ldt */
559 .long sys_adjtimex
560 .long sys_mprotect /* 125 */
561 .long sys_sigprocmask
562 .long sys_ni_syscall /* old "create_module" */
563 .long sys_init_module
564 .long sys_delete_module
565 .long sys_ni_syscall /* 130: old "get_kernel_syms" */
566 .long sys_quotactl
567 .long sys_getpgid
568 .long sys_fchdir
569 .long sys_bdflush
570 .long sys_sysfs /* 135 */
571 .long sys_personality
572 .long sys_ni_syscall /* reserved for afs_syscall */
573 .long sys_setfsuid16
574 .long sys_setfsgid16
575 .long sys_llseek /* 140 */
576 .long sys_getdents
577 .long sys_select
578 .long sys_flock
579 .long sys_msync
580 .long sys_readv /* 145 */
581 .long sys_writev
582 .long sys_getsid
583 .long sys_fdatasync
584 .long sys_sysctl
585 .long sys_mlock /* 150 */
586 .long sys_munlock
587 .long sys_mlockall
588 .long sys_munlockall
589 .long sys_sched_setparam
590 .long sys_sched_getparam /* 155 */
591 .long sys_sched_setscheduler
592 .long sys_sched_getscheduler
593 .long sys_sched_yield
594 .long sys_sched_get_priority_max
595 .long sys_sched_get_priority_min /* 160 */
596 .long sys_sched_rr_get_interval
597 .long sys_nanosleep
598 .long sys_mremap
599 .long sys_setresuid16
600 .long sys_getresuid16 /* 165 */
601 .long sys_ni_syscall /* vm86 */
602 .long sys_ni_syscall /* Old sys_query_module */
603 .long sys_poll
604 .long sys_ni_syscall /* was nfsservctl */
605 .long sys_setresgid16 /* 170 */
606 .long sys_getresgid16
607 .long sys_prctl
608 .long sys_rt_sigreturn
609 .long sys_rt_sigaction
610 .long sys_rt_sigprocmask /* 175 */
611 .long sys_rt_sigpending
612 .long sys_rt_sigtimedwait
613 .long sys_rt_sigqueueinfo
614 .long sys_rt_sigsuspend
615 .long sys_pread64 /* 180 */
616 .long sys_pwrite64
617 .long sys_chown16
618 .long sys_getcwd
619 .long sys_capget
620 .long sys_capset /* 185 */
621 .long sys_sigaltstack
622 .long sys_sendfile
623 .long sys_ni_syscall /* reserved for streams1 */
624 .long sys_ni_syscall /* reserved for streams2 */
625 .long sys_vfork /* 190 */
626 .long sys_getrlimit
627 .long sys_mmap_pgoff
628 .long sys_truncate64
629 .long sys_ftruncate64
630 .long sys_stat64 /* 195 */
631 .long sys_lstat64
632 .long sys_fstat64
633 .long sys_lchown
634 .long sys_getuid
635 .long sys_getgid /* 200 */
636 .long sys_geteuid
637 .long sys_getegid
638 .long sys_setreuid
639 .long sys_setregid
640 .long sys_getgroups /* 205 */
641 .long sys_setgroups
642 .long sys_fchown
643 .long sys_setresuid
644 .long sys_getresuid
645 .long sys_setresgid /* 210 */
646 .long sys_getresgid
647 .long sys_chown
648 .long sys_setuid
649 .long sys_setgid
650 .long sys_setfsuid /* 215 */
651 .long sys_setfsgid
652 .long sys_pivot_root
653 .long sys_mincore
654 .long sys_madvise
655 .long sys_getdents64 /* 220 */
656 .long sys_fcntl64
657 .long sys_ni_syscall /* reserved for TUX */
658 .long sys_ni_syscall
659 .long sys_gettid
660 .long sys_readahead /* 225 */
661 .long sys_setxattr
662 .long sys_lsetxattr
663 .long sys_fsetxattr
664 .long sys_getxattr
665 .long sys_lgetxattr /* 230 */
666 .long sys_fgetxattr
667 .long sys_listxattr
668 .long sys_llistxattr
669 .long sys_flistxattr
670 .long sys_removexattr /* 235 */
671 .long sys_lremovexattr
672 .long sys_fremovexattr
673 .long sys_tkill
674 .long sys_sendfile64
675 .long sys_futex /* 240 */
676 .long sys_sched_setaffinity
677 .long sys_sched_getaffinity
678 .long sys_ni_syscall /* sys_set_thread_area */
679 .long sys_ni_syscall /* sys_get_thread_area */
680 .long sys_io_setup /* 245 */
681 .long sys_io_destroy
682 .long sys_io_getevents
683 .long sys_io_submit
684 .long sys_io_cancel
685 .long sys_fadvise64 /* 250 */
686 .long sys_ni_syscall
687 .long sys_exit_group
688 .long sys_lookup_dcookie
689 .long sys_epoll_create
690 .long sys_epoll_ctl /* 255 */
691 .long sys_epoll_wait
692 .long sys_remap_file_pages
693 .long sys_set_tid_address
694 .long sys_timer_create
695 .long sys_timer_settime /* 260 */
696 .long sys_timer_gettime
697 .long sys_timer_getoverrun
698 .long sys_timer_delete
699 .long sys_clock_settime
700 .long sys_clock_gettime /* 265 */
701 .long sys_clock_getres
702 .long sys_clock_nanosleep
703 .long sys_statfs64
704 .long sys_fstatfs64
705 .long sys_tgkill /* 270 */
706 .long sys_utimes
707 .long sys_fadvise64_64
708 .long sys_ni_syscall /* sys_vserver */
709 .long sys_mbind
710 .long sys_get_mempolicy /* 275 */
711 .long sys_set_mempolicy
712 .long sys_mq_open
713 .long sys_mq_unlink
714 .long sys_mq_timedsend
715 .long sys_mq_timedreceive /* 280 */
716 .long sys_mq_notify
717 .long sys_mq_getsetattr
718 .long sys_kexec_load
719 .long sys_waitid
720 .long sys_ni_syscall /* 285 */ /* available */
721 .long sys_add_key
722 .long sys_request_key
723 .long sys_keyctl
724 .long sys_cacheflush
725 .long sys_ioprio_set /* 290 */
726 .long sys_ioprio_get
727 .long sys_inotify_init
728 .long sys_inotify_add_watch
729 .long sys_inotify_rm_watch
730 .long sys_migrate_pages /* 295 */
731 .long sys_openat
732 .long sys_mkdirat
733 .long sys_mknodat
734 .long sys_fchownat
735 .long sys_futimesat /* 300 */
736 .long sys_fstatat64
737 .long sys_unlinkat
738 .long sys_renameat
739 .long sys_linkat
740 .long sys_symlinkat /* 305 */
741 .long sys_readlinkat
742 .long sys_fchmodat
743 .long sys_faccessat
744 .long sys_pselect6
745 .long sys_ppoll /* 310 */
746 .long sys_unshare
747 .long sys_set_robust_list
748 .long sys_get_robust_list
749 .long sys_splice
750 .long sys_sync_file_range /* 315 */
751 .long sys_tee
752 .long sys_vmsplice
753 .long sys_move_pages
754 .long sys_getcpu
755 .long sys_epoll_pwait /* 320 */
756 .long sys_utimensat
757 .long sys_signalfd
758 .long sys_timerfd_create
759 .long sys_eventfd
760 .long sys_fallocate /* 325 */
761 .long sys_timerfd_settime
762 .long sys_timerfd_gettime
763 .long sys_signalfd4
764 .long sys_eventfd2
765 .long sys_epoll_create1 /* 330 */
766 .long sys_dup3
767 .long sys_pipe2
768 .long sys_inotify_init1
769 .long sys_preadv
770 .long sys_pwritev /* 335 */
771 .long sys_rt_tgsigqueueinfo
772 .long sys_perf_event_open
773 .long sys_recvmmsg
774 .long sys_setns
777 nr_syscalls=(.-sys_call_table)/4