| blob | 2c18d08cd9131fc3f290e4f2c3f885075c031bad |
1 /*
2 * linux/arch/cris/entry.S
3 *
4 * Copyright (C) 2000, 2001, 2002 Axis Communications AB
5 *
6 * Authors: Bjorn Wesen (bjornw@axis.com)
7 */
9 /*
10 * entry.S contains the system-call and fault low-level handling routines.
11 *
12 * NOTE: This code handles signal-recognition, which happens every time
13 * after a timer-interrupt and after each system call.
14 *
15 * Stack layout in 'ret_from_system_call':
16 * ptrace needs to have all regs on the stack.
17 * if the order here is changed, it needs to be
18 * updated in fork.c:copy_process, signal.c:do_signal,
19 * ptrace.c and ptrace.h
20 *
21 */
23 #include <linux/linkage.h>
24 #include <linux/sys.h>
25 #include <asm/unistd.h>
26 #include <arch/sv_addr_ag.h>
27 #include <asm/errno.h>
28 #include <asm/thread_info.h>
29 #include <asm/asm-offsets.h>
30 #include <asm/page.h>
31 #include <asm/pgtable.h>
33 ;; functions exported from this file
35 .globl system_call
36 .globl ret_from_intr
37 .globl ret_from_fork
38 .globl resume
39 .globl multiple_interrupt
40 .globl hwbreakpoint
41 .globl IRQ1_interrupt
42 .globl spurious_interrupt
43 .globl hw_bp_trigs
44 .globl mmu_bus_fault
45 .globl do_sigtrap
46 .globl gdb_handle_breakpoint
47 .globl sys_call_table
49 ;; below are various parts of system_call which are not in the fast-path
51 #ifdef CONFIG_PREEMPT
52 ; Check if preemptive kernel scheduling should be done
53 _resume_kernel:
54 di
55 ; Load current task struct
56 movs.w -8192, $r0 ; THREAD_SIZE = 8192
57 and.d $sp, $r0
58 move.d [$r0+TI_preempt_count], $r10 ; Preemption disabled?
59 bne _Rexit
60 nop
61 _need_resched:
62 move.d [$r0+TI_flags], $r10
63 btstq TIF_NEED_RESCHED, $r10 ; Check if need_resched is set
64 bpl _Rexit
65 nop
66 ; Ok, lets's do some preemptive kernel scheduling
67 jsr preempt_schedule_irq
68 ; Load new task struct
69 movs.w -8192, $r0 ; THREAD_SIZE = 8192
70 and.d $sp, $r0
71 ; One more time (with new task)
72 ba _need_resched
73 nop
74 #else
75 #define _resume_kernel _Rexit
76 #endif
78 ; Called at exit from fork. schedule_tail must be called to drop
79 ; spinlock if CONFIG_PREEMPT
80 ret_from_fork:
81 jsr schedule_tail
82 ba ret_from_sys_call
83 nop
85 ret_from_intr:
86 ;; check for resched if preemptive kernel or if we're going back to user-mode
87 ;; this test matches the user_regs(regs) macro
88 ;; we cannot simply test $dccr, because that does not necessarily
89 ;; reflect what mode we'll return into.
91 move.d [$sp + PT_dccr], $r0; regs->dccr
92 btstq 8, $r0 ; U-flag
93 bpl _resume_kernel
94 ; Note that di below is in delay slot
96 _resume_userspace:
97 di ; so need_resched and sigpending don't change
99 movs.w -8192, $r0 ; THREAD_SIZE == 8192
100 and.d $sp, $r0
102 move.d [$r0+TI_flags], $r10 ; current->work
103 and.d _TIF_WORK_MASK, $r10 ; is there any work to be done on return
104 bne _work_pending
105 nop
106 ba _Rexit
107 nop
109 ;; The system_call is called by a BREAK instruction, which works like
110 ;; an interrupt call but it stores the return PC in BRP instead of IRP.
111 ;; Since we dont really want to have two epilogues (one for system calls
112 ;; and one for interrupts) we push the contents of BRP instead of IRP in the
113 ;; system call prologue, to make it look like an ordinary interrupt on the
114 ;; stackframe.
115 ;;
116 ;; Since we can't have system calls inside interrupts, it should not matter
117 ;; that we don't stack IRP.
118 ;;
119 ;; In r9 we have the wanted syscall number. Arguments come in r10,r11,r12,r13,mof,srp
120 ;;
121 ;; This function looks on the _surface_ like spaghetti programming, but it's
122 ;; really designed so that the fast-path does not force cache-loading of non-used
123 ;; instructions. Only the non-common cases cause the outlined code to run..
125 system_call:
126 ;; stack-frame similar to the irq heads, which is reversed in ret_from_sys_call
127 move $brp,[$sp=$sp-16]; instruction pointer and room for a fake SBFS frame
128 push $srp
129 push $dccr
130 push $mof
131 subq 14*4, $sp ; make room for r0-r13
132 movem $r13, [$sp] ; push r0-r13
133 push $r10 ; push orig_r10
134 clear.d [$sp=$sp-4] ; frametype == 0, normal stackframe
136 movs.w -ENOSYS, $r0
137 move.d $r0, [$sp+PT_r10] ; put the default return value in r10 in the frame
139 ;; check if this process is syscall-traced
141 movs.w -8192, $r0 ; THREAD_SIZE == 8192
142 and.d $sp, $r0
144 move.d [$r0+TI_flags], $r0
145 btstq TIF_SYSCALL_TRACE, $r0
146 bmi _syscall_trace_entry
147 nop
149 _syscall_traced:
151 ;; check for sanity in the requested syscall number
153 cmpu.w NR_syscalls, $r9
154 bcc ret_from_sys_call
155 lslq 2, $r9 ; multiply by 4, in the delay slot
157 ;; as a bonus 7th parameter, we give the location on the stack
158 ;; of the register structure itself. some syscalls need this.
160 push $sp
162 ;; the parameter carrying registers r10, r11, r12 and 13 are intact.
163 ;; the fifth and sixth parameters (if any) was in mof and srp
164 ;; respectively, and we need to put them on the stack.
166 push $srp
167 push $mof
169 jsr [$r9+sys_call_table] ; actually do the system call
170 addq 3*4, $sp ; pop the mof, srp and regs parameters
171 move.d $r10, [$sp+PT_r10] ; save the return value
173 moveq 1, $r9 ; "parameter" to ret_from_sys_call to show it was a sys call
175 ;; fall through into ret_from_sys_call to return
177 ret_from_sys_call:
178 ;; r9 is a parameter - if >=1 we came from a syscall, if 0, from an irq
180 ;; get the current task-struct pointer (see top for defs)
182 movs.w -8192, $r0 ; THREAD_SIZE == 8192
183 and.d $sp, $r0
185 di ; make sure need_resched and sigpending don't change
186 move.d [$r0+TI_flags],$r1
187 and.d _TIF_ALLWORK_MASK, $r1
188 bne _syscall_exit_work
189 nop
191 _Rexit:
192 ;; this epilogue MUST match the prologues in multiple_interrupt, irq.h and ptregs.h
193 pop $r10 ; frametype
194 bne _RBFexit ; was not CRIS_FRAME_NORMAL, handle otherwise
195 addq 4, $sp ; skip orig_r10, in delayslot
196 movem [$sp+], $r13 ; registers r0-r13
197 pop $mof ; multiply overflow register
198 pop $dccr ; condition codes
199 pop $srp ; subroutine return pointer
200 ;; now we have a 4-word SBFS frame which we do not want to restore
201 ;; using RBF since it was not stacked with SBFS. instead we would like to
202 ;; just get the PC value to restart it with, and skip the rest of
203 ;; the frame.
204 ;; Also notice that it's important to use instructions here that
205 ;; keep the interrupts disabled (since we've already popped DCCR)
206 move [$sp=$sp+16], $p8; pop the SBFS frame from the sp
207 jmpu [$sp-16] ; return through the irp field in the sbfs frame
209 _RBFexit:
210 movem [$sp+], $r13 ; registers r0-r13, in delay slot
211 pop $mof ; multiply overflow register
212 pop $dccr ; condition codes
213 pop $srp ; subroutine return pointer
214 rbf [$sp+] ; return by popping the CPU status
216 ;; We get here after doing a syscall if extra work might need to be done
217 ;; perform syscall exit tracing if needed
219 _syscall_exit_work:
220 ;; $r0 contains current at this point and irq's are disabled
222 move.d [$r0+TI_flags], $r1
223 btstq TIF_SYSCALL_TRACE, $r1
224 bpl _work_pending
225 nop
227 ei
229 move.d $r9, $r1 ; preserve r9
230 jsr do_syscall_trace
231 move.d $r1, $r9
233 ba _resume_userspace
234 nop
236 _work_pending:
237 move.d [$r0+TI_flags], $r1
238 btstq TIF_NEED_RESCHED, $r1
239 bpl _work_notifysig ; was neither trace nor sched, must be signal/notify
240 nop
242 _work_resched:
243 move.d $r9, $r1 ; preserve r9
244 jsr schedule
245 move.d $r1, $r9
246 di
248 move.d [$r0+TI_flags], $r1
249 and.d _TIF_WORK_MASK, $r1; ignore the syscall trace counter
250 beq _Rexit
251 nop
252 btstq TIF_NEED_RESCHED, $r1
253 bmi _work_resched ; current->work.need_resched
254 nop
256 _work_notifysig:
257 ;; deal with pending signals and notify-resume requests
259 move.d $r9, $r10 ; do_notify_resume syscall/irq param
260 move.d $sp, $r11 ; the regs param
261 move.d $r1, $r12 ; the thread_info_flags parameter
262 jsr do_notify_resume
264 ba _Rexit
265 nop
267 ;; We get here as a sidetrack when we've entered a syscall with the
268 ;; trace-bit set. We need to call do_syscall_trace and then continue
269 ;; with the call.
271 _syscall_trace_entry:
272 ;; PT_r10 in the frame contains -ENOSYS as required, at this point
274 jsr do_syscall_trace
276 ;; now re-enter the syscall code to do the syscall itself
277 ;; we need to restore $r9 here to contain the wanted syscall, and
278 ;; the other parameter-bearing registers
280 move.d [$sp+PT_r9], $r9
281 move.d [$sp+PT_orig_r10], $r10 ; PT_r10 is already filled with -ENOSYS.
282 move.d [$sp+PT_r11], $r11
283 move.d [$sp+PT_r12], $r12
284 move.d [$sp+PT_r13], $r13
285 move [$sp+PT_mof], $mof
286 move [$sp+PT_srp], $srp
288 ba _syscall_traced
289 nop
291 ;; resume performs the actual task-switching, by switching stack pointers
292 ;; input arguments: r10 = prev, r11 = next, r12 = thread offset in task struct
293 ;; returns old current in r10
294 ;;
295 ;; TODO: see the i386 version. The switch_to which calls resume in our version
296 ;; could really be an inline asm of this.
298 resume:
299 push $srp ; we keep the old/new PC on the stack
300 add.d $r12, $r10 ; r10 = current tasks tss
301 move $dccr, [$r10+THREAD_dccr]; save irq enable state
302 di
304 move $usp, [$r10+ THREAD_usp] ; save user-mode stackpointer
306 ;; See copy_thread for the reason why register R9 is saved.
307 subq 10*4, $sp
308 movem $r9, [$sp] ; save non-scratch registers and R9.
310 move.d $sp, [$r10+THREAD_ksp] ; save the kernel stack pointer for the old task
311 move.d $sp, $r10 ; return last running task in r10
312 and.d -8192, $r10 ; get thread_info from stackpointer
313 move.d [$r10+TI_task], $r10 ; get task
314 add.d $r12, $r11 ; find the new tasks tss
315 move.d [$r11+THREAD_ksp], $sp ; switch into the new stackframe by restoring kernel sp
317 movem [$sp+], $r9 ; restore non-scratch registers and R9.
319 move [$r11+THREAD_usp], $usp ; restore user-mode stackpointer
321 move [$r11+THREAD_dccr], $dccr ; restore irq enable status
322 jump [$sp+] ; restore PC
324 ;; This is the MMU bus fault handler.
325 ;; It needs to stack the CPU status and overall is different
326 ;; from the other interrupt handlers.
328 mmu_bus_fault:
329 ;; For refills we try to do a quick page table lookup. If it is
330 ;; a real fault we let the mm subsystem handle it.
332 ;; the first longword in the sbfs frame was the interrupted PC
333 ;; which fits nicely with the "IRP" slot in pt_regs normally used to
334 ;; contain the return address. used by Oops to print kernel errors.
335 sbfs [$sp=$sp-16] ; push the internal CPU status
336 push $dccr
337 di
338 subq 2*4, $sp
339 movem $r1, [$sp]
340 move.d [R_MMU_CAUSE], $r1
341 ;; ETRAX 100LX TR89 bugfix: if the second half of an unaligned
342 ;; write causes a MMU-fault, it will not be restarted correctly.
343 ;; This could happen if a write crosses a page-boundary and the
344 ;; second page is not yet COW'ed or even loaded. The workaround
345 ;; is to clear the unaligned bit in the CPU status record, so
346 ;; that the CPU will rerun both the first and second halves of
347 ;; the instruction. This will not have any sideeffects unless
348 ;; the first half goes to any device or memory that can't be
349 ;; written twice, and which is mapped through the MMU.
350 ;;
351 ;; We only need to do this for writes.
352 btstq 8, $r1 ; Write access?
353 bpl 1f
354 nop
355 move.d [$sp+16], $r0 ; Clear unaligned bit in csrinstr
356 and.d ~(1<<5), $r0
357 move.d $r0, [$sp+16]
358 1: btstq 12, $r1 ; Refill?
359 bpl 2f
360 lsrq 24, $r1 ; Get PGD index (bit 24-31)
361 move.d [per_cpu__current_pgd], $r0 ; PGD for the current process
362 move.d [$r0+$r1.d], $r0 ; Get PMD
363 beq 2f
364 nop
365 and.w PAGE_MASK, $r0 ; Remove PMD flags
366 move.d [R_MMU_CAUSE], $r1
367 lsrq PAGE_SHIFT, $r1
368 and.d 0x7ff, $r1 ; Get PTE index into PGD (bit 13-23)
369 move.d [$r0+$r1.d], $r1 ; Get PTE
370 beq 2f
371 nop
372 ;; Store in TLB
373 move.d $r1, [R_TLB_LO]
374 ;; Return
375 movem [$sp+], $r1
376 pop $dccr
377 rbf [$sp+] ; return by popping the CPU status
379 2: ; PMD or PTE missing, let the mm subsystem fix it up.
380 movem [$sp+], $r1
381 pop $dccr
383 ; Ok, not that easy, pass it on to the mm subsystem
384 ; The MMU status record is now on the stack
385 push $srp ; make a stackframe similar to pt_regs
386 push $dccr
387 push $mof
388 di
389 subq 14*4, $sp
390 movem $r13, [$sp]
391 push $r10 ; dummy orig_r10
392 moveq 1, $r10
393 push $r10 ; frametype == 1, BUSFAULT frame type
395 move.d $sp, $r10 ; pt_regs argument to handle_mmu_bus_fault
397 jsr handle_mmu_bus_fault ; in arch/cris/arch-v10/mm/fault.c
399 ;; now we need to return through the normal path, we cannot just
400 ;; do the RBFexit since we might have killed off the running
401 ;; process due to a SEGV, scheduled due to a page blocking or
402 ;; whatever.
404 moveq 0, $r9 ; busfault is equivalent to an irq
406 ba ret_from_intr
407 nop
409 ;; special handlers for breakpoint and NMI
410 hwbreakpoint:
411 push $dccr
412 di
413 push $r10
414 push $r11
415 move.d [hw_bp_trig_ptr],$r10
416 move $brp,$r11
417 move.d $r11,[$r10+]
418 move.d $r10,[hw_bp_trig_ptr]
419 1: pop $r11
420 pop $r10
421 pop $dccr
422 retb
423 nop
425 IRQ1_interrupt:
426 ;; this prologue MUST match the one in irq.h and the struct in ptregs.h!!!
427 move $brp,[$sp=$sp-16]; instruction pointer and room for a fake SBFS frame
428 push $srp
429 push $dccr
430 push $mof
431 di
432 subq 14*4, $sp
433 movem $r13, [$sp]
434 push $r10 ; push orig_r10
435 clear.d [$sp=$sp-4] ; frametype == 0, normal frame
437 ;; If there is a glitch on the NMI pin shorter than ~100ns
438 ;; (i.e. non-active by the time we get here) then the nmi_pin bit
439 ;; in R_IRQ_MASK0_RD will already be cleared. The watchdog_nmi bit
440 ;; is cleared by us however (when feeding the watchdog), which is why
441 ;; we use that bit to determine what brought us here.
443 move.d [R_IRQ_MASK0_RD], $r1 ; External NMI or watchdog?
444 and.d (1<<30), $r1
445 bne wdog
446 move.d $sp, $r10
447 jsr handle_nmi
448 setf m ; Enable NMI again
449 ba _Rexit ; Return the standard way
450 nop
451 wdog:
452 #if defined(CONFIG_ETRAX_WATCHDOG) && !defined(CONFIG_SVINTO_SIM)
453 ;; Check if we're waiting for reset to happen, as signalled by
454 ;; hard_reset_now setting cause_of_death to a magic value. If so, just
455 ;; get stuck until reset happens.
456 .comm cause_of_death, 4 ;; Don't declare this anywhere.
457 move.d [cause_of_death], $r10
458 cmp.d 0xbedead, $r10
459 _killed_by_death:
460 beq _killed_by_death
461 nop
463 ;; We'll see this in ksymoops dumps.
464 Watchdog_bite:
466 #ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
467 ;; We just restart the watchdog here to be sure we dont get
468 ;; hit while printing the watchdogmsg below
469 ;; This restart is compatible with the rest of the C-code, so
470 ;; the C-code can keep restarting the watchdog after this point.
471 ;; The non-NICE_DOGGY code below though, disables the possibility
472 ;; to restart since it changes the watchdog key, to avoid any
473 ;; buggy loops etc. keeping the watchdog alive after this.
474 jsr reset_watchdog
475 #else
477 ;; We need to extend the 3.3ms after the NMI at watchdog bite, so we have
478 ;; time for an oops-dump over a 115k2 serial wire. Another 100ms should do.
480 ;; Change the watchdog key to an arbitrary 3-bit value and restart the
481 ;; watchdog.
482 #define WD_INIT 2
483 moveq IO_FIELD (R_WATCHDOG, key, WD_INIT), $r10
484 move.d R_WATCHDOG, $r11
486 move.d $r10, [$r11]
487 moveq IO_FIELD (R_WATCHDOG, key, \
488 IO_EXTRACT (R_WATCHDOG, key, \
489 IO_MASK (R_WATCHDOG, key)) \
490 ^ WD_INIT) \
491 | IO_STATE (R_WATCHDOG, enable, start), $r10
492 move.d $r10, [$r11]
494 #endif
496 ;; Note that we don't do "setf m" here (or after two necessary NOPs),
497 ;; since *not* doing that saves us from re-entrancy checks. We don't want
498 ;; to get here again due to possible subsequent NMIs; we want the watchdog
499 ;; to reset us.
501 move.d _watchdogmsg,$r10
502 jsr printk
504 move.d $sp, $r10
505 jsr watchdog_bite_hook
507 ;; This nop is here so we see the "Watchdog_bite" label in ksymoops dumps
508 ;; rather than "spurious_interrupt".
509 nop
510 ;; At this point we drop down into spurious_interrupt, which will do a
511 ;; hard reset.
513 .section .rodata,"a"
514 _watchdogmsg:
515 .ascii "Oops: bitten by watchdog\n\0"
516 .previous
518 #endif /* CONFIG_ETRAX_WATCHDOG and not CONFIG_SVINTO_SIM */
520 spurious_interrupt:
521 di
522 jump hard_reset_now
524 ;; this handles the case when multiple interrupts arrive at the same time
525 ;; we jump to the first set interrupt bit in a priority fashion
526 ;; the hardware will call the unserved interrupts after the handler finishes
528 multiple_interrupt:
529 ;; this prologue MUST match the one in irq.h and the struct in ptregs.h!!!
530 move $irp,[$sp=$sp-16]; instruction pointer and room for a fake SBFS frame
531 push $srp
532 push $dccr
533 push $mof
534 di
535 subq 14*4, $sp
536 movem $r13, [$sp]
537 push $r10 ; push orig_r10
538 clear.d [$sp=$sp-4] ; frametype == 0, normal frame
540 move.d $sp, $r10
541 jsr do_multiple_IRQ
543 jump ret_from_intr
545 do_sigtrap:
546 ;;
547 ;; SIGTRAP the process that executed the break instruction.
548 ;; Make a frame that Rexit in entry.S expects.
549 ;;
550 move $brp, [$sp=$sp-16] ; Push BRP while faking a cpu status record.
551 push $srp ; Push subroutine return pointer.
552 push $dccr ; Push condition codes.
553 push $mof ; Push multiply overflow reg.
554 di ; Need to disable irq's at this point.
555 subq 14*4, $sp ; Make room for r0-r13.
556 movem $r13, [$sp] ; Push the r0-r13 registers.
557 push $r10 ; Push orig_r10.
558 clear.d [$sp=$sp-4] ; Frametype - this is a normal stackframe.
560 movs.w -8192,$r9 ; THREAD_SIZE == 8192
561 and.d $sp, $r9
562 move.d [$r9+TI_task], $r10
563 move.d [$r10+TASK_pid], $r10 ; current->pid as arg1.
564 moveq 5, $r11 ; SIGTRAP as arg2.
565 jsr sys_kill
566 jump ret_from_intr ; Use the return routine for interrupts.
568 gdb_handle_breakpoint:
569 push $dccr
570 push $r0
571 #ifdef CONFIG_ETRAX_KGDB
572 move $dccr, $r0 ; U-flag not affected by previous insns.
573 btstq 8, $r0 ; Test the U-flag.
574 bmi _ugdb_handle_breakpoint ; Go to user mode debugging.
575 nop ; Empty delay slot (cannot pop r0 here).
576 pop $r0 ; Restore r0.
577 ba kgdb_handle_breakpoint ; Go to kernel debugging.
578 pop $dccr ; Restore dccr in delay slot.
579 #endif
581 _ugdb_handle_breakpoint:
582 move $brp, $r0 ; Use r0 temporarily for calculation.
583 subq 2, $r0 ; Set to address of previous instruction.
584 move $r0, $brp
585 pop $r0 ; Restore r0.
586 ba do_sigtrap ; SIGTRAP the offending process.
587 pop $dccr ; Restore dccr in delay slot.
589 .global kernel_execve
590 kernel_execve:
591 move.d __NR_execve, $r9
592 break 13
593 ret
594 nop
596 .data
598 hw_bp_trigs:
599 .space 64*4
600 hw_bp_trig_ptr:
601 .dword hw_bp_trigs
603 .section .rodata,"a"
604 sys_call_table:
605 .long sys_restart_syscall /* 0 - old "setup()" system call, used for restarting */
606 .long sys_exit
607 .long sys_fork
608 .long sys_read
609 .long sys_write
610 .long sys_open /* 5 */
611 .long sys_close
612 .long sys_waitpid
613 .long sys_creat
614 .long sys_link
615 .long sys_unlink /* 10 */
616 .long sys_execve
617 .long sys_chdir
618 .long sys_time
619 .long sys_mknod
620 .long sys_chmod /* 15 */
621 .long sys_lchown16
622 .long sys_ni_syscall /* old break syscall holder */
623 .long sys_stat
624 .long sys_lseek
625 .long sys_getpid /* 20 */
626 .long sys_mount
627 .long sys_oldumount
628 .long sys_setuid16
629 .long sys_getuid16
630 .long sys_stime /* 25 */
631 .long sys_ptrace
632 .long sys_alarm
633 .long sys_fstat
634 .long sys_pause
635 .long sys_utime /* 30 */
636 .long sys_ni_syscall /* old stty syscall holder */
637 .long sys_ni_syscall /* old gtty syscall holder */
638 .long sys_access
639 .long sys_nice
640 .long sys_ni_syscall /* 35 old ftime syscall holder */
641 .long sys_sync
642 .long sys_kill
643 .long sys_rename
644 .long sys_mkdir
645 .long sys_rmdir /* 40 */
646 .long sys_dup
647 .long sys_pipe
648 .long sys_times
649 .long sys_ni_syscall /* old prof syscall holder */
650 .long sys_brk /* 45 */
651 .long sys_setgid16
652 .long sys_getgid16
653 .long sys_signal
654 .long sys_geteuid16
655 .long sys_getegid16 /* 50 */
656 .long sys_acct
657 .long sys_umount /* recycled never used phys( */
658 .long sys_ni_syscall /* old lock syscall holder */
659 .long sys_ioctl
660 .long sys_fcntl /* 55 */
661 .long sys_ni_syscall /* old mpx syscall holder */
662 .long sys_setpgid
663 .long sys_ni_syscall /* old ulimit syscall holder */
664 .long sys_ni_syscall /* old sys_olduname holder */
665 .long sys_umask /* 60 */
666 .long sys_chroot
667 .long sys_ustat
668 .long sys_dup2
669 .long sys_getppid
670 .long sys_getpgrp /* 65 */
671 .long sys_setsid
672 .long sys_sigaction
673 .long sys_sgetmask
674 .long sys_ssetmask
675 .long sys_setreuid16 /* 70 */
676 .long sys_setregid16
677 .long sys_sigsuspend
678 .long sys_sigpending
679 .long sys_sethostname
680 .long sys_setrlimit /* 75 */
681 .long sys_old_getrlimit
682 .long sys_getrusage
683 .long sys_gettimeofday
684 .long sys_settimeofday
685 .long sys_getgroups16 /* 80 */
686 .long sys_setgroups16
687 .long sys_select /* was old_select in Linux/E100 */
688 .long sys_symlink
689 .long sys_lstat
690 .long sys_readlink /* 85 */
691 .long sys_uselib
692 .long sys_swapon
693 .long sys_reboot
694 .long sys_old_readdir
695 .long old_mmap /* 90 */
696 .long sys_munmap
697 .long sys_truncate
698 .long sys_ftruncate
699 .long sys_fchmod
700 .long sys_fchown16 /* 95 */
701 .long sys_getpriority
702 .long sys_setpriority
703 .long sys_ni_syscall /* old profil syscall holder */
704 .long sys_statfs
705 .long sys_fstatfs /* 100 */
706 .long sys_ni_syscall /* sys_ioperm in i386 */
707 .long sys_socketcall
708 .long sys_syslog
709 .long sys_setitimer
710 .long sys_getitimer /* 105 */
711 .long sys_newstat
712 .long sys_newlstat
713 .long sys_newfstat
714 .long sys_ni_syscall /* old sys_uname holder */
715 .long sys_ni_syscall /* sys_iopl in i386 */
716 .long sys_vhangup
717 .long sys_ni_syscall /* old "idle" system call */
718 .long sys_ni_syscall /* vm86old in i386 */
719 .long sys_wait4
720 .long sys_swapoff /* 115 */
721 .long sys_sysinfo
722 .long sys_ipc
723 .long sys_fsync
724 .long sys_sigreturn
725 .long sys_clone /* 120 */
726 .long sys_setdomainname
727 .long sys_newuname
728 .long sys_ni_syscall /* sys_modify_ldt */
729 .long sys_adjtimex
730 .long sys_mprotect /* 125 */
731 .long sys_sigprocmask
732 .long sys_ni_syscall /* old "create_module" */
733 .long sys_init_module
734 .long sys_delete_module
735 .long sys_ni_syscall /* 130: old "get_kernel_syms" */
736 .long sys_quotactl
737 .long sys_getpgid
738 .long sys_fchdir
739 .long sys_bdflush
740 .long sys_sysfs /* 135 */
741 .long sys_personality
742 .long sys_ni_syscall /* for afs_syscall */
743 .long sys_setfsuid16
744 .long sys_setfsgid16
745 .long sys_llseek /* 140 */
746 .long sys_getdents
747 .long sys_select
748 .long sys_flock
749 .long sys_msync
750 .long sys_readv /* 145 */
751 .long sys_writev
752 .long sys_getsid
753 .long sys_fdatasync
754 .long sys_sysctl
755 .long sys_mlock /* 150 */
756 .long sys_munlock
757 .long sys_mlockall
758 .long sys_munlockall
759 .long sys_sched_setparam
760 .long sys_sched_getparam /* 155 */
761 .long sys_sched_setscheduler
762 .long sys_sched_getscheduler
763 .long sys_sched_yield
764 .long sys_sched_get_priority_max
765 .long sys_sched_get_priority_min /* 160 */
766 .long sys_sched_rr_get_interval
767 .long sys_nanosleep
768 .long sys_mremap
769 .long sys_setresuid16
770 .long sys_getresuid16 /* 165 */
771 .long sys_ni_syscall /* sys_vm86 */
772 .long sys_ni_syscall /* Old sys_query_module */
773 .long sys_poll
774 .long sys_nfsservctl
775 .long sys_setresgid16 /* 170 */
776 .long sys_getresgid16
777 .long sys_prctl
778 .long sys_rt_sigreturn
779 .long sys_rt_sigaction
780 .long sys_rt_sigprocmask /* 175 */
781 .long sys_rt_sigpending
782 .long sys_rt_sigtimedwait
783 .long sys_rt_sigqueueinfo
784 .long sys_rt_sigsuspend
785 .long sys_pread64 /* 180 */
786 .long sys_pwrite64
787 .long sys_chown16
788 .long sys_getcwd
789 .long sys_capget
790 .long sys_capset /* 185 */
791 .long sys_sigaltstack
792 .long sys_sendfile
793 .long sys_ni_syscall /* streams1 */
794 .long sys_ni_syscall /* streams2 */
795 .long sys_vfork /* 190 */
796 .long sys_getrlimit
797 .long sys_mmap2
798 .long sys_truncate64
799 .long sys_ftruncate64
800 .long sys_stat64 /* 195 */
801 .long sys_lstat64
802 .long sys_fstat64
803 .long sys_lchown
804 .long sys_getuid
805 .long sys_getgid /* 200 */
806 .long sys_geteuid
807 .long sys_getegid
808 .long sys_setreuid
809 .long sys_setregid
810 .long sys_getgroups /* 205 */
811 .long sys_setgroups
812 .long sys_fchown
813 .long sys_setresuid
814 .long sys_getresuid
815 .long sys_setresgid /* 210 */
816 .long sys_getresgid
817 .long sys_chown
818 .long sys_setuid
819 .long sys_setgid
820 .long sys_setfsuid /* 215 */
821 .long sys_setfsgid
822 .long sys_pivot_root
823 .long sys_mincore
824 .long sys_madvise
825 .long sys_getdents64 /* 220 */
826 .long sys_fcntl64
827 .long sys_ni_syscall /* reserved for TUX */
828 .long sys_ni_syscall
829 .long sys_gettid
830 .long sys_readahead /* 225 */
831 .long sys_setxattr
832 .long sys_lsetxattr
833 .long sys_fsetxattr
834 .long sys_getxattr
835 .long sys_lgetxattr /* 230 */
836 .long sys_fgetxattr
837 .long sys_listxattr
838 .long sys_llistxattr
839 .long sys_flistxattr
840 .long sys_removexattr /* 235 */
841 .long sys_lremovexattr
842 .long sys_fremovexattr
843 .long sys_tkill
844 .long sys_sendfile64
845 .long sys_futex /* 240 */
846 .long sys_sched_setaffinity
847 .long sys_sched_getaffinity
848 .long sys_ni_syscall /* sys_set_thread_area */
849 .long sys_ni_syscall /* sys_get_thread_area */
850 .long sys_io_setup /* 245 */
851 .long sys_io_destroy
852 .long sys_io_getevents
853 .long sys_io_submit
854 .long sys_io_cancel
855 .long sys_fadvise64 /* 250 */
856 .long sys_ni_syscall
857 .long sys_exit_group
858 .long sys_lookup_dcookie
859 .long sys_epoll_create
860 .long sys_epoll_ctl /* 255 */
861 .long sys_epoll_wait
862 .long sys_remap_file_pages
863 .long sys_set_tid_address
864 .long sys_timer_create
865 .long sys_timer_settime /* 260 */
866 .long sys_timer_gettime
867 .long sys_timer_getoverrun
868 .long sys_timer_delete
869 .long sys_clock_settime
870 .long sys_clock_gettime /* 265 */
871 .long sys_clock_getres
872 .long sys_clock_nanosleep
873 .long sys_statfs64
874 .long sys_fstatfs64
875 .long sys_tgkill /* 270 */
876 .long sys_utimes
877 .long sys_fadvise64_64
878 .long sys_ni_syscall /* sys_vserver */
879 .long sys_ni_syscall /* sys_mbind */
880 .long sys_ni_syscall /* 275 sys_get_mempolicy */
881 .long sys_ni_syscall /* sys_set_mempolicy */
882 .long sys_mq_open
883 .long sys_mq_unlink
884 .long sys_mq_timedsend
885 .long sys_mq_timedreceive /* 280 */
886 .long sys_mq_notify
887 .long sys_mq_getsetattr
888 .long sys_ni_syscall /* reserved for kexec */
889 .long sys_waitid
890 .long sys_ni_syscall /* 285 */ /* available */
891 .long sys_add_key
892 .long sys_request_key
893 .long sys_keyctl
894 .long sys_ioprio_set
895 .long sys_ioprio_get /* 290 */
896 .long sys_inotify_init
897 .long sys_inotify_add_watch
898 .long sys_inotify_rm_watch
899 .long sys_migrate_pages
900 .long sys_openat /* 295 */
901 .long sys_mkdirat
902 .long sys_mknodat
903 .long sys_fchownat
904 .long sys_futimesat
905 .long sys_fstatat64 /* 300 */
906 .long sys_unlinkat
907 .long sys_renameat
908 .long sys_linkat
909 .long sys_symlinkat
910 .long sys_readlinkat /* 305 */
911 .long sys_fchmodat
912 .long sys_faccessat
913 .long sys_pselect6
914 .long sys_ppoll
915 .long sys_unshare /* 310 */
916 .long sys_set_robust_list
917 .long sys_get_robust_list
918 .long sys_splice
919 .long sys_sync_file_range
920 .long sys_tee /* 315 */
921 .long sys_vmsplice
922 .long sys_move_pages
923 .long sys_getcpu
924 .long sys_epoll_pwait
925 .long sys_utimensat /* 320 */
926 .long sys_signalfd
927 .long sys_timerfd_create
928 .long sys_eventfd
929 .long sys_fallocate
930 .long sys_timerfd_settime /* 325 */
931 .long sys_timerfd_gettime
932 .long sys_signalfd4
933 .long sys_eventfd2
934 .long sys_epoll_create1
935 .long sys_dup3 /* 330 */
936 .long sys_pipe2
937 .long sys_inotify_init1
938 .long sys_preadv
939 .long sys_pwritev
941 /*
942 * NOTE!! This doesn't have to be exact - we just have
943 * to make sure we have _enough_ of the "sys_ni_syscall"
944 * entries. Don't panic if you notice that this hasn't
945 * been shrunk every time we add a new system call.
946 */
948 .rept NR_syscalls-(.-sys_call_table)/4
949 .long sys_ni_syscall
950 .endr