| blob | 3e3620d9fc45eb2636aaae6e9a1d3f5e8f9762ed |
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/system.h>
19 #include <asm/irqflags.h>
20 #include <asm/thread_info.h>
21 #include <asm/intctl-regs.h>
22 #include <asm/busctl-regs.h>
23 #include <asm/timer-regs.h>
24 #include <unit/leds.h>
25 #include <asm/page.h>
26 #include <asm/pgtable.h>
27 #include <asm/errno.h>
28 #include <asm/asm-offsets.h>
29 #include <asm/frame.inc>
31 #if defined(CONFIG_SMP) && defined(CONFIG_GDBSTUB)
32 #include <asm/gdb-stub.h>
33 #endif /* CONFIG_SMP && CONFIG_GDBSTUB */
35 #ifdef CONFIG_PREEMPT
36 #define preempt_stop LOCAL_IRQ_DISABLE
37 #else
38 #define preempt_stop
39 #define resume_kernel restore_all
40 #endif
42 .am33_2
44 ###############################################################################
45 #
46 # the return path for a forked child
47 # - on entry, D0 holds the address of the previous task to run
48 #
49 ###############################################################################
50 ENTRY(ret_from_fork)
51 call schedule_tail[],0
52 GET_THREAD_INFO a2
54 # return 0 to indicate child process
55 clr d0
56 mov d0,(REG_D0,fp)
57 jmp syscall_exit
59 ###############################################################################
60 #
61 # system call handler
62 #
63 ###############################################################################
64 ENTRY(system_call)
65 add -4,sp
66 SAVE_ALL
67 mov d0,(REG_ORIG_D0,fp)
68 GET_THREAD_INFO a2
69 cmp nr_syscalls,d0
70 bcc syscall_badsys
71 btst _TIF_SYSCALL_TRACE,(TI_flags,a2)
72 bne syscall_entry_trace
73 syscall_call:
74 add d0,d0,a1
75 add a1,a1
76 mov (REG_A0,fp),d0
77 mov (sys_call_table,a1),a0
78 calls (a0)
79 mov d0,(REG_D0,fp)
80 syscall_exit:
81 # make sure we don't miss an interrupt setting need_resched or
82 # sigpending between sampling and the rti
83 LOCAL_IRQ_DISABLE
84 mov (TI_flags,a2),d2
85 btst _TIF_ALLWORK_MASK,d2
86 bne syscall_exit_work
87 restore_all:
88 RESTORE_ALL
90 ###############################################################################
91 #
92 # perform work that needs to be done immediately before resumption and syscall
93 # tracing
94 #
95 ###############################################################################
96 ALIGN
97 syscall_exit_work:
98 btst _TIF_SYSCALL_TRACE,d2
99 beq work_pending
100 LOCAL_IRQ_ENABLE # could let syscall_trace_exit() call
101 # schedule() instead
102 mov fp,d0
103 call syscall_trace_exit[],0 # do_syscall_trace(regs)
104 jmp resume_userspace
106 ALIGN
107 work_pending:
108 btst _TIF_NEED_RESCHED,d2
109 beq work_notifysig
111 work_resched:
112 call schedule[],0
114 # make sure we don't miss an interrupt setting need_resched or
115 # sigpending between sampling and the rti
116 LOCAL_IRQ_DISABLE
118 # is there any work to be done other than syscall tracing?
119 mov (TI_flags,a2),d2
120 btst _TIF_WORK_MASK,d2
121 beq restore_all
122 btst _TIF_NEED_RESCHED,d2
123 bne work_resched
125 # deal with pending signals and notify-resume requests
126 work_notifysig:
127 mov fp,d0
128 mov d2,d1
129 call do_notify_resume[],0
130 jmp resume_userspace
132 # perform syscall entry tracing
133 syscall_entry_trace:
134 mov -ENOSYS,d0
135 mov d0,(REG_D0,fp)
136 mov fp,d0
137 call syscall_trace_entry[],0 # returns the syscall number to actually use
138 mov (REG_D1,fp),d1
139 cmp nr_syscalls,d0
140 bcs syscall_call
141 jmp syscall_exit
143 syscall_badsys:
144 mov -ENOSYS,d0
145 mov d0,(REG_D0,fp)
146 jmp resume_userspace
148 # userspace resumption stub bypassing syscall exit tracing
149 .globl ret_from_exception, ret_from_intr
150 ALIGN
151 ret_from_exception:
152 preempt_stop
153 ret_from_intr:
154 GET_THREAD_INFO a2
155 mov (REG_EPSW,fp),d0 # need to deliver signals before
156 # returning to userspace
157 and EPSW_nSL,d0
158 beq resume_kernel # returning to supervisor mode
160 ENTRY(resume_userspace)
161 # make sure we don't miss an interrupt setting need_resched or
162 # sigpending between sampling and the rti
163 LOCAL_IRQ_DISABLE
165 # is there any work to be done on int/exception return?
166 mov (TI_flags,a2),d2
167 btst _TIF_WORK_MASK,d2
168 bne work_pending
169 jmp restore_all
171 #ifdef CONFIG_PREEMPT
172 ENTRY(resume_kernel)
173 LOCAL_IRQ_DISABLE
174 mov (TI_preempt_count,a2),d0 # non-zero preempt_count ?
175 cmp 0,d0
176 bne restore_all
178 need_resched:
179 btst _TIF_NEED_RESCHED,(TI_flags,a2)
180 beq restore_all
181 mov (REG_EPSW,fp),d0
182 and EPSW_IM,d0
183 cmp EPSW_IM_7,d0 # interrupts off (exception path) ?
184 bne restore_all
185 call preempt_schedule_irq[],0
186 jmp need_resched
187 #endif
190 ###############################################################################
191 #
192 # IRQ handler entry point
193 # - intended to be entered at multiple priorities
194 #
195 ###############################################################################
196 ENTRY(irq_handler)
197 add -4,sp
198 SAVE_ALL
200 # it's not a syscall
201 mov 0xffffffff,d0
202 mov d0,(REG_ORIG_D0,fp)
204 mov fp,d0
205 call do_IRQ[],0 # do_IRQ(regs)
207 jmp ret_from_intr
209 ###############################################################################
210 #
211 # Double Fault handler entry point
212 # - note that there will not be a stack, D0/A0 will hold EPSW/PC as were
213 #
214 ###############################################################################
215 .section .bss
216 .balign THREAD_SIZE
217 .space THREAD_SIZE
218 __df_stack:
219 .previous
221 ENTRY(double_fault)
222 mov a0,(__df_stack-4) # PC as was
223 mov d0,(__df_stack-8) # EPSW as was
224 mn10300_set_dbfleds # display 'db-f' on the LEDs
225 mov 0xaa55aa55,d0
226 mov d0,(__df_stack-12) # no ORIG_D0
227 mov sp,a0 # save corrupted SP
228 mov __df_stack-12,sp # emergency supervisor stack
229 SAVE_ALL
230 mov a0,(REG_A0,fp) # save corrupted SP as A0 (which got
231 # clobbered by the CPU)
232 mov fp,d0
233 calls do_double_fault
234 double_fault_loop:
235 bra double_fault_loop
237 ###############################################################################
238 #
239 # Bus Error handler entry point
240 # - handle external (async) bus errors separately
241 #
242 ###############################################################################
243 ENTRY(raw_bus_error)
244 add -4,sp
245 mov d0,(sp)
246 #if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR)
247 mov (MMUCTR),d0
248 mov d0,(MMUCTR)
249 #endif
250 mov (BCBERR),d0 # what
251 btst BCBERR_BEMR_DMA,d0 # see if it was an external bus error
252 beq __common_exception_aux # it wasn't
254 SAVE_ALL
255 mov (BCBEAR),d1 # destination of erroneous access
257 mov (REG_ORIG_D0,fp),d2
258 mov d2,(REG_D0,fp)
259 mov -1,d2
260 mov d2,(REG_ORIG_D0,fp)
262 add -4,sp
263 mov fp,(12,sp) # frame pointer
264 call io_bus_error[],0
265 jmp restore_all
267 ###############################################################################
268 #
269 # NMI exception entry points
270 #
271 # This is used by ordinary interrupt channels that have the GxICR_NMI bit set
272 # in addition to the main NMI and Watchdog channels. SMP NMI IPIs use this
273 # facility.
274 #
275 ###############################################################################
276 ENTRY(nmi_handler)
277 add -4,sp
278 mov d0,(sp)
279 mov (TBR),d0
281 #ifdef CONFIG_SMP
282 add -4,sp
283 mov d0,(sp) # save d0(TBR)
284 movhu (NMIAGR),d0
285 and NMIAGR_GN,d0
286 lsr 0x2,d0
287 cmp CALL_FUNCTION_NMI_IPI,d0
288 bne nmi_not_smp_callfunc # if not call function, jump
290 # function call nmi ipi
291 add 4,sp # no need to store TBR
292 mov GxICR_DETECT,d0 # clear NMI request
293 movbu d0,(GxICR(CALL_FUNCTION_NMI_IPI))
294 movhu (GxICR(CALL_FUNCTION_NMI_IPI)),d0
295 and ~EPSW_NMID,epsw # enable NMI
297 mov (sp),d0 # restore d0
298 SAVE_ALL
299 call smp_nmi_call_function_interrupt[],0
300 RESTORE_ALL
302 nmi_not_smp_callfunc:
303 #ifdef CONFIG_KERNEL_DEBUGGER
304 cmp DEBUGGER_NMI_IPI,d0
305 bne nmi_not_debugger # if not kernel debugger NMI IPI, jump
307 # kernel debugger NMI IPI
308 add 4,sp # no need to store TBR
309 mov GxICR_DETECT,d0 # clear NMI
310 movbu d0,(GxICR(DEBUGGER_NMI_IPI))
311 movhu (GxICR(DEBUGGER_NMI_IPI)),d0
312 and ~EPSW_NMID,epsw # enable NMI
314 mov (sp),d0
315 SAVE_ALL
316 mov fp,d0 # arg 0: stacked register file
317 mov a2,d1 # arg 1: exception number
318 call debugger_nmi_interrupt[],0
319 RESTORE_ALL
321 nmi_not_debugger:
322 #endif /* CONFIG_KERNEL_DEBUGGER */
323 mov (sp),d0 # restore TBR to d0
324 add 4,sp
325 #endif /* CONFIG_SMP */
327 bra __common_exception_nonmi
329 ###############################################################################
330 #
331 # General exception entry point
332 #
333 ###############################################################################
334 ENTRY(__common_exception)
335 add -4,sp
336 mov d0,(sp)
337 #if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR)
338 mov (MMUCTR),d0
339 mov d0,(MMUCTR)
340 #endif
342 __common_exception_aux:
343 mov (TBR),d0
344 and ~EPSW_NMID,epsw # turn NMIs back on if not NMI
345 or EPSW_IE,epsw
347 __common_exception_nonmi:
348 and 0x0000FFFF,d0 # turn the exception code into a vector
349 # table index
351 btst 0x00000007,d0
352 bne 1f
353 cmp 0x00000400,d0
354 bge 1f
356 SAVE_ALL # build the stack frame
358 mov (REG_D0,fp),a2 # get the exception number
359 mov (REG_ORIG_D0,fp),d0
360 mov d0,(REG_D0,fp)
361 mov -1,d0
362 mov d0,(REG_ORIG_D0,fp)
364 #ifdef CONFIG_GDBSTUB
365 #ifdef CONFIG_SMP
366 call gdbstub_busy_check[],0
367 and d0,d0 # check return value
368 beq 2f
369 #else /* CONFIG_SMP */
370 btst 0x01,(gdbstub_busy)
371 beq 2f
372 #endif /* CONFIG_SMP */
373 and ~EPSW_IE,epsw
374 mov fp,d0
375 mov a2,d1
376 call gdbstub_exception[],0 # gdbstub itself caused an exception
377 bra restore_all
378 2:
379 #endif /* CONFIG_GDBSTUB */
381 mov fp,d0 # arg 0: stacked register file
382 mov a2,d1 # arg 1: exception number
383 lsr 1,a2
385 mov (exception_table,a2),a2
386 calls (a2)
387 jmp ret_from_exception
389 1: pi # BUG() equivalent
391 ###############################################################################
392 #
393 # Exception handler functions table
394 #
395 ###############################################################################
396 .data
397 ENTRY(exception_table)
398 .rept 0x400>>1
399 .long uninitialised_exception
400 .endr
401 .previous
403 ###############################################################################
404 #
405 # Change an entry in the exception table
406 # - D0 exception code, D1 handler
407 #
408 ###############################################################################
409 ENTRY(set_excp_vector)
410 lsr 1,d0
411 add exception_table,d0
412 mov d1,(d0)
413 mov 4,d1
414 ret [],0
416 ###############################################################################
417 #
418 # System call table
419 #
420 ###############################################################################
421 .data
422 ENTRY(sys_call_table)
423 .long sys_restart_syscall /* 0 */
424 .long sys_exit
425 .long sys_fork
426 .long sys_read
427 .long sys_write
428 .long sys_open /* 5 */
429 .long sys_close
430 .long sys_waitpid
431 .long sys_creat
432 .long sys_link
433 .long sys_unlink /* 10 */
434 .long sys_execve
435 .long sys_chdir
436 .long sys_time
437 .long sys_mknod
438 .long sys_chmod /* 15 */
439 .long sys_lchown16
440 .long sys_ni_syscall /* old break syscall holder */
441 .long sys_stat
442 .long sys_lseek
443 .long sys_getpid /* 20 */
444 .long sys_mount
445 .long sys_oldumount
446 .long sys_setuid16
447 .long sys_getuid16
448 .long sys_stime /* 25 */
449 .long sys_ptrace
450 .long sys_alarm
451 .long sys_fstat
452 .long sys_pause
453 .long sys_utime /* 30 */
454 .long sys_ni_syscall /* old stty syscall holder */
455 .long sys_ni_syscall /* old gtty syscall holder */
456 .long sys_access
457 .long sys_nice
458 .long sys_ni_syscall /* 35 - old ftime syscall holder */
459 .long sys_sync
460 .long sys_kill
461 .long sys_rename
462 .long sys_mkdir
463 .long sys_rmdir /* 40 */
464 .long sys_dup
465 .long sys_pipe
466 .long sys_times
467 .long sys_ni_syscall /* old prof syscall holder */
468 .long sys_brk /* 45 */
469 .long sys_setgid16
470 .long sys_getgid16
471 .long sys_signal
472 .long sys_geteuid16
473 .long sys_getegid16 /* 50 */
474 .long sys_acct
475 .long sys_umount /* recycled never used phys() */
476 .long sys_ni_syscall /* old lock syscall holder */
477 .long sys_ioctl
478 .long sys_fcntl /* 55 */
479 .long sys_ni_syscall /* old mpx syscall holder */
480 .long sys_setpgid
481 .long sys_ni_syscall /* old ulimit syscall holder */
482 .long sys_ni_syscall /* old sys_olduname */
483 .long sys_umask /* 60 */
484 .long sys_chroot
485 .long sys_ustat
486 .long sys_dup2
487 .long sys_getppid
488 .long sys_getpgrp /* 65 */
489 .long sys_setsid
490 .long sys_sigaction
491 .long sys_sgetmask
492 .long sys_ssetmask
493 .long sys_setreuid16 /* 70 */
494 .long sys_setregid16
495 .long sys_sigsuspend
496 .long sys_sigpending
497 .long sys_sethostname
498 .long sys_setrlimit /* 75 */
499 .long sys_old_getrlimit
500 .long sys_getrusage
501 .long sys_gettimeofday
502 .long sys_settimeofday
503 .long sys_getgroups16 /* 80 */
504 .long sys_setgroups16
505 .long sys_old_select
506 .long sys_symlink
507 .long sys_lstat
508 .long sys_readlink /* 85 */
509 .long sys_uselib
510 .long sys_swapon
511 .long sys_reboot
512 .long sys_old_readdir
513 .long old_mmap /* 90 */
514 .long sys_munmap
515 .long sys_truncate
516 .long sys_ftruncate
517 .long sys_fchmod
518 .long sys_fchown16 /* 95 */
519 .long sys_getpriority
520 .long sys_setpriority
521 .long sys_ni_syscall /* old profil syscall holder */
522 .long sys_statfs
523 .long sys_fstatfs /* 100 */
524 .long sys_ni_syscall /* ioperm */
525 .long sys_socketcall
526 .long sys_syslog
527 .long sys_setitimer
528 .long sys_getitimer /* 105 */
529 .long sys_newstat
530 .long sys_newlstat
531 .long sys_newfstat
532 .long sys_ni_syscall /* old sys_uname */
533 .long sys_ni_syscall /* 110 - iopl */
534 .long sys_vhangup
535 .long sys_ni_syscall /* old "idle" system call */
536 .long sys_ni_syscall /* vm86old */
537 .long sys_wait4
538 .long sys_swapoff /* 115 */
539 .long sys_sysinfo
540 .long sys_ipc
541 .long sys_fsync
542 .long sys_sigreturn
543 .long sys_clone /* 120 */
544 .long sys_setdomainname
545 .long sys_newuname
546 .long sys_ni_syscall /* modify_ldt */
547 .long sys_adjtimex
548 .long sys_mprotect /* 125 */
549 .long sys_sigprocmask
550 .long sys_ni_syscall /* old "create_module" */
551 .long sys_init_module
552 .long sys_delete_module
553 .long sys_ni_syscall /* 130: old "get_kernel_syms" */
554 .long sys_quotactl
555 .long sys_getpgid
556 .long sys_fchdir
557 .long sys_bdflush
558 .long sys_sysfs /* 135 */
559 .long sys_personality
560 .long sys_ni_syscall /* reserved for afs_syscall */
561 .long sys_setfsuid16
562 .long sys_setfsgid16
563 .long sys_llseek /* 140 */
564 .long sys_getdents
565 .long sys_select
566 .long sys_flock
567 .long sys_msync
568 .long sys_readv /* 145 */
569 .long sys_writev
570 .long sys_getsid
571 .long sys_fdatasync
572 .long sys_sysctl
573 .long sys_mlock /* 150 */
574 .long sys_munlock
575 .long sys_mlockall
576 .long sys_munlockall
577 .long sys_sched_setparam
578 .long sys_sched_getparam /* 155 */
579 .long sys_sched_setscheduler
580 .long sys_sched_getscheduler
581 .long sys_sched_yield
582 .long sys_sched_get_priority_max
583 .long sys_sched_get_priority_min /* 160 */
584 .long sys_sched_rr_get_interval
585 .long sys_nanosleep
586 .long sys_mremap
587 .long sys_setresuid16
588 .long sys_getresuid16 /* 165 */
589 .long sys_ni_syscall /* vm86 */
590 .long sys_ni_syscall /* Old sys_query_module */
591 .long sys_poll
592 .long sys_ni_syscall /* was nfsservctl */
593 .long sys_setresgid16 /* 170 */
594 .long sys_getresgid16
595 .long sys_prctl
596 .long sys_rt_sigreturn
597 .long sys_rt_sigaction
598 .long sys_rt_sigprocmask /* 175 */
599 .long sys_rt_sigpending
600 .long sys_rt_sigtimedwait
601 .long sys_rt_sigqueueinfo
602 .long sys_rt_sigsuspend
603 .long sys_pread64 /* 180 */
604 .long sys_pwrite64
605 .long sys_chown16
606 .long sys_getcwd
607 .long sys_capget
608 .long sys_capset /* 185 */
609 .long sys_sigaltstack
610 .long sys_sendfile
611 .long sys_ni_syscall /* reserved for streams1 */
612 .long sys_ni_syscall /* reserved for streams2 */
613 .long sys_vfork /* 190 */
614 .long sys_getrlimit
615 .long sys_mmap_pgoff
616 .long sys_truncate64
617 .long sys_ftruncate64
618 .long sys_stat64 /* 195 */
619 .long sys_lstat64
620 .long sys_fstat64
621 .long sys_lchown
622 .long sys_getuid
623 .long sys_getgid /* 200 */
624 .long sys_geteuid
625 .long sys_getegid
626 .long sys_setreuid
627 .long sys_setregid
628 .long sys_getgroups /* 205 */
629 .long sys_setgroups
630 .long sys_fchown
631 .long sys_setresuid
632 .long sys_getresuid
633 .long sys_setresgid /* 210 */
634 .long sys_getresgid
635 .long sys_chown
636 .long sys_setuid
637 .long sys_setgid
638 .long sys_setfsuid /* 215 */
639 .long sys_setfsgid
640 .long sys_pivot_root
641 .long sys_mincore
642 .long sys_madvise
643 .long sys_getdents64 /* 220 */
644 .long sys_fcntl64
645 .long sys_ni_syscall /* reserved for TUX */
646 .long sys_ni_syscall
647 .long sys_gettid
648 .long sys_readahead /* 225 */
649 .long sys_setxattr
650 .long sys_lsetxattr
651 .long sys_fsetxattr
652 .long sys_getxattr
653 .long sys_lgetxattr /* 230 */
654 .long sys_fgetxattr
655 .long sys_listxattr
656 .long sys_llistxattr
657 .long sys_flistxattr
658 .long sys_removexattr /* 235 */
659 .long sys_lremovexattr
660 .long sys_fremovexattr
661 .long sys_tkill
662 .long sys_sendfile64
663 .long sys_futex /* 240 */
664 .long sys_sched_setaffinity
665 .long sys_sched_getaffinity
666 .long sys_ni_syscall /* sys_set_thread_area */
667 .long sys_ni_syscall /* sys_get_thread_area */
668 .long sys_io_setup /* 245 */
669 .long sys_io_destroy
670 .long sys_io_getevents
671 .long sys_io_submit
672 .long sys_io_cancel
673 .long sys_fadvise64 /* 250 */
674 .long sys_ni_syscall
675 .long sys_exit_group
676 .long sys_lookup_dcookie
677 .long sys_epoll_create
678 .long sys_epoll_ctl /* 255 */
679 .long sys_epoll_wait
680 .long sys_remap_file_pages
681 .long sys_set_tid_address
682 .long sys_timer_create
683 .long sys_timer_settime /* 260 */
684 .long sys_timer_gettime
685 .long sys_timer_getoverrun
686 .long sys_timer_delete
687 .long sys_clock_settime
688 .long sys_clock_gettime /* 265 */
689 .long sys_clock_getres
690 .long sys_clock_nanosleep
691 .long sys_statfs64
692 .long sys_fstatfs64
693 .long sys_tgkill /* 270 */
694 .long sys_utimes
695 .long sys_fadvise64_64
696 .long sys_ni_syscall /* sys_vserver */
697 .long sys_mbind
698 .long sys_get_mempolicy /* 275 */
699 .long sys_set_mempolicy
700 .long sys_mq_open
701 .long sys_mq_unlink
702 .long sys_mq_timedsend
703 .long sys_mq_timedreceive /* 280 */
704 .long sys_mq_notify
705 .long sys_mq_getsetattr
706 .long sys_kexec_load
707 .long sys_waitid
708 .long sys_ni_syscall /* 285 */ /* available */
709 .long sys_add_key
710 .long sys_request_key
711 .long sys_keyctl
712 .long sys_cacheflush
713 .long sys_ioprio_set /* 290 */
714 .long sys_ioprio_get
715 .long sys_inotify_init
716 .long sys_inotify_add_watch
717 .long sys_inotify_rm_watch
718 .long sys_migrate_pages /* 295 */
719 .long sys_openat
720 .long sys_mkdirat
721 .long sys_mknodat
722 .long sys_fchownat
723 .long sys_futimesat /* 300 */
724 .long sys_fstatat64
725 .long sys_unlinkat
726 .long sys_renameat
727 .long sys_linkat
728 .long sys_symlinkat /* 305 */
729 .long sys_readlinkat
730 .long sys_fchmodat
731 .long sys_faccessat
732 .long sys_pselect6
733 .long sys_ppoll /* 310 */
734 .long sys_unshare
735 .long sys_set_robust_list
736 .long sys_get_robust_list
737 .long sys_splice
738 .long sys_sync_file_range /* 315 */
739 .long sys_tee
740 .long sys_vmsplice
741 .long sys_move_pages
742 .long sys_getcpu
743 .long sys_epoll_pwait /* 320 */
744 .long sys_utimensat
745 .long sys_signalfd
746 .long sys_timerfd_create
747 .long sys_eventfd
748 .long sys_fallocate /* 325 */
749 .long sys_timerfd_settime
750 .long sys_timerfd_gettime
751 .long sys_signalfd4
752 .long sys_eventfd2
753 .long sys_epoll_create1 /* 330 */
754 .long sys_dup3
755 .long sys_pipe2
756 .long sys_inotify_init1
757 .long sys_preadv
758 .long sys_pwritev /* 335 */
759 .long sys_rt_tgsigqueueinfo
760 .long sys_perf_event_open
761 .long sys_recvmmsg
762 .long sys_setns
765 nr_syscalls=(.-sys_call_table)/4