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> 29 30#if defined(CONFIG_SMP) && defined(CONFIG_GDBSTUB) 31#include <asm/gdb-stub.h> 32#endif /* CONFIG_SMP && CONFIG_GDBSTUB */ 33 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 40 41 .am33_2 42 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############################################################################### 49ENTRY(ret_from_fork) 50 call schedule_tail[],0 51 GET_THREAD_INFO a2 52 53 # return 0 to indicate child process 54 clr d0 55 mov d0,(REG_D0,fp) 56 jmp syscall_exit 57 58############################################################################### 59# 60# system call handler 61# 62############################################################################### 63ENTRY(system_call) 64 add -4,sp 65 SAVE_ALL 66 mov d0,(REG_ORIG_D0,fp) 67 GET_THREAD_INFO a2 68 cmp nr_syscalls,d0 69 bcc syscall_badsys 70 btst _TIF_SYSCALL_TRACE,(TI_flags,a2) 71 bne syscall_entry_trace 72syscall_call: 73 add d0,d0,a1 74 add a1,a1 75 mov (REG_A0,fp),d0 76 mov (sys_call_table,a1),a0 77 calls (a0) 78 mov d0,(REG_D0,fp) 79syscall_exit: 80 # make sure we don't miss an interrupt setting need_resched or 81 # sigpending between sampling and the rti 82 LOCAL_IRQ_DISABLE 83 mov (TI_flags,a2),d2 84 btst _TIF_ALLWORK_MASK,d2 85 bne syscall_exit_work 86restore_all: 87 RESTORE_ALL 88 89############################################################################### 90# 91# perform work that needs to be done immediately before resumption and syscall 92# tracing 93# 94############################################################################### 95 ALIGN 96syscall_exit_work: 97 btst _TIF_SYSCALL_TRACE,d2 98 beq work_pending 99 LOCAL_IRQ_ENABLE # could let syscall_trace_exit() call 100 # schedule() instead 101 mov fp,d0 102 call syscall_trace_exit[],0 # do_syscall_trace(regs) 103 jmp resume_userspace 104 105 ALIGN 106work_pending: 107 btst _TIF_NEED_RESCHED,d2 108 beq work_notifysig 109 110work_resched: 111 call schedule[],0 112 113 # make sure we don't miss an interrupt setting need_resched or 114 # sigpending between sampling and the rti 115 LOCAL_IRQ_DISABLE 116 117 # is there any work to be done other than syscall tracing? 118 mov (TI_flags,a2),d2 119 btst _TIF_WORK_MASK,d2 120 beq restore_all 121 btst _TIF_NEED_RESCHED,d2 122 bne work_resched 123 124 # deal with pending signals and notify-resume requests 125work_notifysig: 126 mov fp,d0 127 mov d2,d1 128 call do_notify_resume[],0 129 jmp resume_userspace 130 131 # perform syscall entry tracing 132syscall_entry_trace: 133 mov -ENOSYS,d0 134 mov d0,(REG_D0,fp) 135 mov fp,d0 136 call syscall_trace_entry[],0 # returns the syscall number to actually use 137 mov (REG_D1,fp),d1 138 cmp nr_syscalls,d0 139 bcs syscall_call 140 jmp syscall_exit 141 142syscall_badsys: 143 mov -ENOSYS,d0 144 mov d0,(REG_D0,fp) 145 jmp resume_userspace 146 147 # userspace resumption stub bypassing syscall exit tracing 148 .globl ret_from_exception, ret_from_intr 149 ALIGN 150ret_from_exception: 151 preempt_stop 152ret_from_intr: 153 GET_THREAD_INFO a2 154 mov (REG_EPSW,fp),d0 # need to deliver signals before 155 # returning to userspace 156 and EPSW_nSL,d0 157 beq resume_kernel # returning to supervisor mode 158 159ENTRY(resume_userspace) 160 # make sure we don't miss an interrupt setting need_resched or 161 # sigpending between sampling and the rti 162 LOCAL_IRQ_DISABLE 163 164 # is there any work to be done on int/exception return? 165 mov (TI_flags,a2),d2 166 btst _TIF_WORK_MASK,d2 167 bne work_pending 168 jmp restore_all 169 170#ifdef CONFIG_PREEMPT 171ENTRY(resume_kernel) 172 LOCAL_IRQ_DISABLE 173 mov (TI_preempt_count,a2),d0 # non-zero preempt_count ? 174 cmp 0,d0 175 bne restore_all 176 177need_resched: 178 btst _TIF_NEED_RESCHED,(TI_flags,a2) 179 beq restore_all 180 mov (REG_EPSW,fp),d0 181 and EPSW_IM,d0 182 cmp EPSW_IM_7,d0 # interrupts off (exception path) ? 183 bne restore_all 184 call preempt_schedule_irq[],0 185 jmp need_resched 186#endif 187 188 189############################################################################### 190# 191# IRQ handler entry point 192# - intended to be entered at multiple priorities 193# 194############################################################################### 195ENTRY(irq_handler) 196 add -4,sp 197 SAVE_ALL 198 199 # it's not a syscall 200 mov 0xffffffff,d0 201 mov d0,(REG_ORIG_D0,fp) 202 203 mov fp,d0 204 call do_IRQ[],0 # do_IRQ(regs) 205 206 jmp ret_from_intr 207 208############################################################################### 209# 210# Double Fault handler entry point 211# - note that there will not be a stack, D0/A0 will hold EPSW/PC as were 212# 213############################################################################### 214 .section .bss 215 .balign THREAD_SIZE 216 .space THREAD_SIZE 217__df_stack: 218 .previous 219 220ENTRY(double_fault) 221 mov a0,(__df_stack-4) # PC as was 222 mov d0,(__df_stack-8) # EPSW as was 223 mn10300_set_dbfleds # display 'db-f' on the LEDs 224 mov 0xaa55aa55,d0 225 mov d0,(__df_stack-12) # no ORIG_D0 226 mov sp,a0 # save corrupted SP 227 mov __df_stack-12,sp # emergency supervisor stack 228 SAVE_ALL 229 mov a0,(REG_A0,fp) # save corrupted SP as A0 (which got 230 # clobbered by the CPU) 231 mov fp,d0 232 calls do_double_fault 233double_fault_loop: 234 bra double_fault_loop 235 236############################################################################### 237# 238# Bus Error handler entry point 239# - handle external (async) bus errors separately 240# 241############################################################################### 242ENTRY(raw_bus_error) 243 add -4,sp 244 mov d0,(sp) 245#if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR) 246 mov (MMUCTR),d0 247 mov d0,(MMUCTR) 248#endif 249 mov (BCBERR),d0 # what 250 btst BCBERR_BEMR_DMA,d0 # see if it was an external bus error 251 beq __common_exception_aux # it wasn't 252 253 SAVE_ALL 254 mov (BCBEAR),d1 # destination of erroneous access 255 256 mov (REG_ORIG_D0,fp),d2 257 mov d2,(REG_D0,fp) 258 mov -1,d2 259 mov d2,(REG_ORIG_D0,fp) 260 261 add -4,sp 262 mov fp,(12,sp) # frame pointer 263 call io_bus_error[],0 264 jmp restore_all 265 266############################################################################### 267# 268# NMI exception entry points 269# 270# This is used by ordinary interrupt channels that have the GxICR_NMI bit set 271# in addition to the main NMI and Watchdog channels. SMP NMI IPIs use this 272# facility. 273# 274############################################################################### 275ENTRY(nmi_handler) 276 add -4,sp 277 mov d0,(sp) 278 mov (TBR),d0 279 280#ifdef CONFIG_SMP 281 add -4,sp 282 mov d0,(sp) # save d0(TBR) 283 movhu (NMIAGR),d0 284 and NMIAGR_GN,d0 285 lsr 0x2,d0 286 cmp CALL_FUNCTION_NMI_IPI,d0 287 bne nmi_not_smp_callfunc # if not call function, jump 288 289 # function call nmi ipi 290 add 4,sp # no need to store TBR 291 mov GxICR_DETECT,d0 # clear NMI request 292 movbu d0,(GxICR(CALL_FUNCTION_NMI_IPI)) 293 movhu (GxICR(CALL_FUNCTION_NMI_IPI)),d0 294 and ~EPSW_NMID,epsw # enable NMI 295 296 mov (sp),d0 # restore d0 297 SAVE_ALL 298 call smp_nmi_call_function_interrupt[],0 299 RESTORE_ALL 300 301nmi_not_smp_callfunc: 302#ifdef CONFIG_KERNEL_DEBUGGER 303 cmp DEBUGGER_NMI_IPI,d0 304 bne nmi_not_debugger # if not kernel debugger NMI IPI, jump 305 306 # kernel debugger NMI IPI 307 add 4,sp # no need to store TBR 308 mov GxICR_DETECT,d0 # clear NMI 309 movbu d0,(GxICR(DEBUGGER_NMI_IPI)) 310 movhu (GxICR(DEBUGGER_NMI_IPI)),d0 311 and ~EPSW_NMID,epsw # enable NMI 312 313 mov (sp),d0 314 SAVE_ALL 315 mov fp,d0 # arg 0: stacked register file 316 mov a2,d1 # arg 1: exception number 317 call debugger_nmi_interrupt[],0 318 RESTORE_ALL 319 320nmi_not_debugger: 321#endif /* CONFIG_KERNEL_DEBUGGER */ 322 mov (sp),d0 # restore TBR to d0 323 add 4,sp 324#endif /* CONFIG_SMP */ 325 326 bra __common_exception_nonmi 327 328############################################################################### 329# 330# General exception entry point 331# 332############################################################################### 333ENTRY(__common_exception) 334 add -4,sp 335 mov d0,(sp) 336#if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR) 337 mov (MMUCTR),d0 338 mov d0,(MMUCTR) 339#endif 340 341__common_exception_aux: 342 mov (TBR),d0 343 and ~EPSW_NMID,epsw # turn NMIs back on if not NMI 344 or EPSW_IE,epsw 345 346__common_exception_nonmi: 347 and 0x0000FFFF,d0 # turn the exception code into a vector 348 # table index 349 350 btst 0x00000007,d0 351 bne 1f 352 cmp 0x00000400,d0 353 bge 1f 354 355 SAVE_ALL # build the stack frame 356 357 mov (REG_D0,fp),a2 # get the exception number 358 mov (REG_ORIG_D0,fp),d0 359 mov d0,(REG_D0,fp) 360 mov -1,d0 361 mov d0,(REG_ORIG_D0,fp) 362 363#ifdef CONFIG_GDBSTUB 364#ifdef CONFIG_SMP 365 call gdbstub_busy_check[],0 366 and d0,d0 # check return value 367 beq 2f 368#else /* CONFIG_SMP */ 369 btst 0x01,(gdbstub_busy) 370 beq 2f 371#endif /* CONFIG_SMP */ 372 and ~EPSW_IE,epsw 373 mov fp,d0 374 mov a2,d1 375 call gdbstub_exception[],0 # gdbstub itself caused an exception 376 bra restore_all 3772: 378#endif /* CONFIG_GDBSTUB */ 379 380 mov fp,d0 # arg 0: stacked register file 381 mov a2,d1 # arg 1: exception number 382 lsr 1,a2 383 384 mov (exception_table,a2),a2 385 calls (a2) 386 jmp ret_from_exception 387 3881: pi # BUG() equivalent 389 390############################################################################### 391# 392# Exception handler functions table 393# 394############################################################################### 395 .data 396ENTRY(exception_table) 397 .rept 0x400>>1 398 .long uninitialised_exception 399 .endr 400 .previous 401 402############################################################################### 403# 404# Change an entry in the exception table 405# - D0 exception code, D1 handler 406# 407############################################################################### 408ENTRY(set_excp_vector) 409 lsr 1,d0 410 add exception_table,d0 411 mov d1,(d0) 412 mov 4,d1 413 ret [],0 414 415############################################################################### 416# 417# System call table 418# 419############################################################################### 420 .data 421ENTRY(sys_call_table) 422 .long sys_restart_syscall /* 0 */ 423 .long sys_exit 424 .long sys_fork 425 .long sys_read 426 .long sys_write 427 .long sys_open /* 5 */ 428 .long sys_close 429 .long sys_waitpid 430 .long sys_creat 431 .long sys_link 432 .long sys_unlink /* 10 */ 433 .long sys_execve 434 .long sys_chdir 435 .long sys_time 436 .long sys_mknod 437 .long sys_chmod /* 15 */ 438 .long sys_lchown16 439 .long sys_ni_syscall /* old break syscall holder */ 440 .long sys_stat 441 .long sys_lseek 442 .long sys_getpid /* 20 */ 443 .long sys_mount 444 .long sys_oldumount 445 .long sys_setuid16 446 .long sys_getuid16 447 .long sys_stime /* 25 */ 448 .long sys_ptrace 449 .long sys_alarm 450 .long sys_fstat 451 .long sys_pause 452 .long sys_utime /* 30 */ 453 .long sys_ni_syscall /* old stty syscall holder */ 454 .long sys_ni_syscall /* old gtty syscall holder */ 455 .long sys_access 456 .long sys_nice 457 .long sys_ni_syscall /* 35 - old ftime syscall holder */ 458 .long sys_sync 459 .long sys_kill 460 .long sys_rename 461 .long sys_mkdir 462 .long sys_rmdir /* 40 */ 463 .long sys_dup 464 .long sys_pipe 465 .long sys_times 466 .long sys_ni_syscall /* old prof syscall holder */ 467 .long sys_brk /* 45 */ 468 .long sys_setgid16 469 .long sys_getgid16 470 .long sys_signal 471 .long sys_geteuid16 472 .long sys_getegid16 /* 50 */ 473 .long sys_acct 474 .long sys_umount /* recycled never used phys() */ 475 .long sys_ni_syscall /* old lock syscall holder */ 476 .long sys_ioctl 477 .long sys_fcntl /* 55 */ 478 .long sys_ni_syscall /* old mpx syscall holder */ 479 .long sys_setpgid 480 .long sys_ni_syscall /* old ulimit syscall holder */ 481 .long sys_ni_syscall /* old sys_olduname */ 482 .long sys_umask /* 60 */ 483 .long sys_chroot 484 .long sys_ustat 485 .long sys_dup2 486 .long sys_getppid 487 .long sys_getpgrp /* 65 */ 488 .long sys_setsid 489 .long sys_sigaction 490 .long sys_sgetmask 491 .long sys_ssetmask 492 .long sys_setreuid16 /* 70 */ 493 .long sys_setregid16 494 .long sys_sigsuspend 495 .long sys_sigpending 496 .long sys_sethostname 497 .long sys_setrlimit /* 75 */ 498 .long sys_old_getrlimit 499 .long sys_getrusage 500 .long sys_gettimeofday 501 .long sys_settimeofday 502 .long sys_getgroups16 /* 80 */ 503 .long sys_setgroups16 504 .long sys_old_select 505 .long sys_symlink 506 .long sys_lstat 507 .long sys_readlink /* 85 */ 508 .long sys_uselib 509 .long sys_swapon 510 .long sys_reboot 511 .long sys_old_readdir 512 .long old_mmap /* 90 */ 513 .long sys_munmap 514 .long sys_truncate 515 .long sys_ftruncate 516 .long sys_fchmod 517 .long sys_fchown16 /* 95 */ 518 .long sys_getpriority 519 .long sys_setpriority 520 .long sys_ni_syscall /* old profil syscall holder */ 521 .long sys_statfs 522 .long sys_fstatfs /* 100 */ 523 .long sys_ni_syscall /* ioperm */ 524 .long sys_socketcall 525 .long sys_syslog 526 .long sys_setitimer 527 .long sys_getitimer /* 105 */ 528 .long sys_newstat 529 .long sys_newlstat 530 .long sys_newfstat 531 .long sys_ni_syscall /* old sys_uname */ 532 .long sys_ni_syscall /* 110 - iopl */ 533 .long sys_vhangup 534 .long sys_ni_syscall /* old "idle" system call */ 535 .long sys_ni_syscall /* vm86old */ 536 .long sys_wait4 537 .long sys_swapoff /* 115 */ 538 .long sys_sysinfo 539 .long sys_ipc 540 .long sys_fsync 541 .long sys_sigreturn 542 .long sys_clone /* 120 */ 543 .long sys_setdomainname 544 .long sys_newuname 545 .long sys_ni_syscall /* modify_ldt */ 546 .long sys_adjtimex 547 .long sys_mprotect /* 125 */ 548 .long sys_sigprocmask 549 .long sys_ni_syscall /* old "create_module" */ 550 .long sys_init_module 551 .long sys_delete_module 552 .long sys_ni_syscall /* 130: old "get_kernel_syms" */ 553 .long sys_quotactl 554 .long sys_getpgid 555 .long sys_fchdir 556 .long sys_bdflush 557 .long sys_sysfs /* 135 */ 558 .long sys_personality 559 .long sys_ni_syscall /* reserved for afs_syscall */ 560 .long sys_setfsuid16 561 .long sys_setfsgid16 562 .long sys_llseek /* 140 */ 563 .long sys_getdents 564 .long sys_select 565 .long sys_flock 566 .long sys_msync 567 .long sys_readv /* 145 */ 568 .long sys_writev 569 .long sys_getsid 570 .long sys_fdatasync 571 .long sys_sysctl 572 .long sys_mlock /* 150 */ 573 .long sys_munlock 574 .long sys_mlockall 575 .long sys_munlockall 576 .long sys_sched_setparam 577 .long sys_sched_getparam /* 155 */ 578 .long sys_sched_setscheduler 579 .long sys_sched_getscheduler 580 .long sys_sched_yield 581 .long sys_sched_get_priority_max 582 .long sys_sched_get_priority_min /* 160 */ 583 .long sys_sched_rr_get_interval 584 .long sys_nanosleep 585 .long sys_mremap 586 .long sys_setresuid16 587 .long sys_getresuid16 /* 165 */ 588 .long sys_ni_syscall /* vm86 */ 589 .long sys_ni_syscall /* Old sys_query_module */ 590 .long sys_poll 591 .long sys_ni_syscall /* was nfsservctl */ 592 .long sys_setresgid16 /* 170 */ 593 .long sys_getresgid16 594 .long sys_prctl 595 .long sys_rt_sigreturn 596 .long sys_rt_sigaction 597 .long sys_rt_sigprocmask /* 175 */ 598 .long sys_rt_sigpending 599 .long sys_rt_sigtimedwait 600 .long sys_rt_sigqueueinfo 601 .long sys_rt_sigsuspend 602 .long sys_pread64 /* 180 */ 603 .long sys_pwrite64 604 .long sys_chown16 605 .long sys_getcwd 606 .long sys_capget 607 .long sys_capset /* 185 */ 608 .long sys_sigaltstack 609 .long sys_sendfile 610 .long sys_ni_syscall /* reserved for streams1 */ 611 .long sys_ni_syscall /* reserved for streams2 */ 612 .long sys_vfork /* 190 */ 613 .long sys_getrlimit 614 .long sys_mmap_pgoff 615 .long sys_truncate64 616 .long sys_ftruncate64 617 .long sys_stat64 /* 195 */ 618 .long sys_lstat64 619 .long sys_fstat64 620 .long sys_lchown 621 .long sys_getuid 622 .long sys_getgid /* 200 */ 623 .long sys_geteuid 624 .long sys_getegid 625 .long sys_setreuid 626 .long sys_setregid 627 .long sys_getgroups /* 205 */ 628 .long sys_setgroups 629 .long sys_fchown 630 .long sys_setresuid 631 .long sys_getresuid 632 .long sys_setresgid /* 210 */ 633 .long sys_getresgid 634 .long sys_chown 635 .long sys_setuid 636 .long sys_setgid 637 .long sys_setfsuid /* 215 */ 638 .long sys_setfsgid 639 .long sys_pivot_root 640 .long sys_mincore 641 .long sys_madvise 642 .long sys_getdents64 /* 220 */ 643 .long sys_fcntl64 644 .long sys_ni_syscall /* reserved for TUX */ 645 .long sys_ni_syscall 646 .long sys_gettid 647 .long sys_readahead /* 225 */ 648 .long sys_setxattr 649 .long sys_lsetxattr 650 .long sys_fsetxattr 651 .long sys_getxattr 652 .long sys_lgetxattr /* 230 */ 653 .long sys_fgetxattr 654 .long sys_listxattr 655 .long sys_llistxattr 656 .long sys_flistxattr 657 .long sys_removexattr /* 235 */ 658 .long sys_lremovexattr 659 .long sys_fremovexattr 660 .long sys_tkill 661 .long sys_sendfile64 662 .long sys_futex /* 240 */ 663 .long sys_sched_setaffinity 664 .long sys_sched_getaffinity 665 .long sys_ni_syscall /* sys_set_thread_area */ 666 .long sys_ni_syscall /* sys_get_thread_area */ 667 .long sys_io_setup /* 245 */ 668 .long sys_io_destroy 669 .long sys_io_getevents 670 .long sys_io_submit 671 .long sys_io_cancel 672 .long sys_fadvise64 /* 250 */ 673 .long sys_ni_syscall 674 .long sys_exit_group 675 .long sys_lookup_dcookie 676 .long sys_epoll_create 677 .long sys_epoll_ctl /* 255 */ 678 .long sys_epoll_wait 679 .long sys_remap_file_pages 680 .long sys_set_tid_address 681 .long sys_timer_create 682 .long sys_timer_settime /* 260 */ 683 .long sys_timer_gettime 684 .long sys_timer_getoverrun 685 .long sys_timer_delete 686 .long sys_clock_settime 687 .long sys_clock_gettime /* 265 */ 688 .long sys_clock_getres 689 .long sys_clock_nanosleep 690 .long sys_statfs64 691 .long sys_fstatfs64 692 .long sys_tgkill /* 270 */ 693 .long sys_utimes 694 .long sys_fadvise64_64 695 .long sys_ni_syscall /* sys_vserver */ 696 .long sys_mbind 697 .long sys_get_mempolicy /* 275 */ 698 .long sys_set_mempolicy 699 .long sys_mq_open 700 .long sys_mq_unlink 701 .long sys_mq_timedsend 702 .long sys_mq_timedreceive /* 280 */ 703 .long sys_mq_notify 704 .long sys_mq_getsetattr 705 .long sys_kexec_load 706 .long sys_waitid 707 .long sys_ni_syscall /* 285 */ /* available */ 708 .long sys_add_key 709 .long sys_request_key 710 .long sys_keyctl 711 .long sys_cacheflush 712 .long sys_ioprio_set /* 290 */ 713 .long sys_ioprio_get 714 .long sys_inotify_init 715 .long sys_inotify_add_watch 716 .long sys_inotify_rm_watch 717 .long sys_migrate_pages /* 295 */ 718 .long sys_openat 719 .long sys_mkdirat 720 .long sys_mknodat 721 .long sys_fchownat 722 .long sys_futimesat /* 300 */ 723 .long sys_fstatat64 724 .long sys_unlinkat 725 .long sys_renameat 726 .long sys_linkat 727 .long sys_symlinkat /* 305 */ 728 .long sys_readlinkat 729 .long sys_fchmodat 730 .long sys_faccessat 731 .long sys_pselect6 732 .long sys_ppoll /* 310 */ 733 .long sys_unshare 734 .long sys_set_robust_list 735 .long sys_get_robust_list 736 .long sys_splice 737 .long sys_sync_file_range /* 315 */ 738 .long sys_tee 739 .long sys_vmsplice 740 .long sys_move_pages 741 .long sys_getcpu 742 .long sys_epoll_pwait /* 320 */ 743 .long sys_utimensat 744 .long sys_signalfd 745 .long sys_timerfd_create 746 .long sys_eventfd 747 .long sys_fallocate /* 325 */ 748 .long sys_timerfd_settime 749 .long sys_timerfd_gettime 750 .long sys_signalfd4 751 .long sys_eventfd2 752 .long sys_epoll_create1 /* 330 */ 753 .long sys_dup3 754 .long sys_pipe2 755 .long sys_inotify_init1 756 .long sys_preadv 757 .long sys_pwritev /* 335 */ 758 .long sys_rt_tgsigqueueinfo 759 .long sys_perf_event_open 760 .long sys_recvmmsg 761 .long sys_setns 762 763 764nr_syscalls=(.-sys_call_table)/4 765