| blob | 1f066eebbd2b06ec3d838c4a26a33ff0be38dfe4 |
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * linux/arch/cris/entry.S
4 *
5 * Copyright (C) 2000, 2001, 2002 Axis Communications AB
6 *
7 * Authors: Bjorn Wesen (bjornw@axis.com)
8 */
10 /*
11 * entry.S contains the system-call and fault low-level handling routines.
12 *
13 * NOTE: This code handles signal-recognition, which happens every time
14 * after a timer-interrupt and after each system call.
15 *
16 * Stack layout in 'ret_from_system_call':
17 * ptrace needs to have all regs on the stack.
18 * if the order here is changed, it needs to be
19 * updated in fork.c:copy_process, signal.c:do_signal,
20 * ptrace.c and ptrace.h
21 *
22 */
24 #include <linux/linkage.h>
25 #include <linux/sys.h>
26 #include <asm/unistd.h>
27 #include <arch/sv_addr_ag.h>
28 #include <asm/errno.h>
29 #include <asm/thread_info.h>
30 #include <asm/asm-offsets.h>
31 #include <asm/page.h>
32 #include <asm/pgtable.h>
34 ;; functions exported from this file
36 .globl system_call
37 .globl ret_from_intr
38 .globl ret_from_fork
39 .globl ret_from_kernel_thread
40 .globl resume
41 .globl multiple_interrupt
42 .globl hwbreakpoint
43 .globl IRQ1_interrupt
44 .globl spurious_interrupt
45 .globl hw_bp_trigs
46 .globl mmu_bus_fault
47 .globl do_sigtrap
48 .globl gdb_handle_breakpoint
49 .globl sys_call_table
51 ;; below are various parts of system_call which are not in the fast-path
53 #ifdef CONFIG_PREEMPT
54 ; Check if preemptive kernel scheduling should be done
55 _resume_kernel:
56 di
57 ; Load current task struct
58 movs.w -8192, $r0 ; THREAD_SIZE = 8192
59 and.d $sp, $r0
60 move.d [$r0+TI_preempt_count], $r10 ; Preemption disabled?
61 bne _Rexit
62 nop
63 _need_resched:
64 move.d [$r0+TI_flags], $r10
65 btstq TIF_NEED_RESCHED, $r10 ; Check if need_resched is set
66 bpl _Rexit
67 nop
68 ; Ok, lets's do some preemptive kernel scheduling
69 jsr preempt_schedule_irq
70 ; Load new task struct
71 movs.w -8192, $r0 ; THREAD_SIZE = 8192
72 and.d $sp, $r0
73 ; One more time (with new task)
74 ba _need_resched
75 nop
76 #else
77 #define _resume_kernel _Rexit
78 #endif
80 ; Called at exit from fork. schedule_tail must be called to drop
81 ; spinlock if CONFIG_PREEMPT
82 ret_from_fork:
83 jsr schedule_tail
84 ba ret_from_sys_call
85 nop
87 ret_from_kernel_thread:
88 jsr schedule_tail
89 move.d $r2, $r10 ; argument is here
90 jsr $r1 ; call the payload
91 moveq 0, $r9 ; no syscall restarts, TYVM...
92 ba ret_from_sys_call
94 ret_from_intr:
95 ;; check for resched if preemptive kernel or if we're going back to user-mode
96 ;; this test matches the user_regs(regs) macro
97 ;; we cannot simply test $dccr, because that does not necessarily
98 ;; reflect what mode we'll return into.
100 move.d [$sp + PT_dccr], $r0; regs->dccr
101 btstq 8, $r0 ; U-flag
102 bpl _resume_kernel
103 ; Note that di below is in delay slot
105 _resume_userspace:
106 di ; so need_resched and sigpending don't change
108 movs.w -8192, $r0 ; THREAD_SIZE == 8192
109 and.d $sp, $r0
111 move.d [$r0+TI_flags], $r10 ; current->work
112 and.d _TIF_WORK_MASK, $r10 ; is there any work to be done on return
113 bne _work_pending
114 nop
115 ba _Rexit
116 nop
118 ;; The system_call is called by a BREAK instruction, which works like
119 ;; an interrupt call but it stores the return PC in BRP instead of IRP.
120 ;; Since we dont really want to have two epilogues (one for system calls
121 ;; and one for interrupts) we push the contents of BRP instead of IRP in the
122 ;; system call prologue, to make it look like an ordinary interrupt on the
123 ;; stackframe.
124 ;;
125 ;; Since we can't have system calls inside interrupts, it should not matter
126 ;; that we don't stack IRP.
127 ;;
128 ;; In r9 we have the wanted syscall number. Arguments come in r10,r11,r12,r13,mof,srp
129 ;;
130 ;; This function looks on the _surface_ like spaghetti programming, but it's
131 ;; really designed so that the fast-path does not force cache-loading of non-used
132 ;; instructions. Only the non-common cases cause the outlined code to run..
134 system_call:
135 ;; stack-frame similar to the irq heads, which is reversed in ret_from_sys_call
136 move $brp,[$sp=$sp-16]; instruction pointer and room for a fake SBFS frame
137 push $srp
138 push $dccr
139 push $mof
140 subq 14*4, $sp ; make room for r0-r13
141 movem $r13, [$sp] ; push r0-r13
142 push $r10 ; push orig_r10
143 clear.d [$sp=$sp-4] ; frametype == 0, normal stackframe
145 movs.w -ENOSYS, $r0
146 move.d $r0, [$sp+PT_r10] ; put the default return value in r10 in the frame
148 ;; check if this process is syscall-traced
150 movs.w -8192, $r0 ; THREAD_SIZE == 8192
151 and.d $sp, $r0
153 move.d [$r0+TI_flags], $r0
154 btstq TIF_SYSCALL_TRACE, $r0
155 bmi _syscall_trace_entry
156 nop
158 _syscall_traced:
160 ;; check for sanity in the requested syscall number
162 cmpu.w NR_syscalls, $r9
163 bcc ret_from_sys_call
164 lslq 2, $r9 ; multiply by 4, in the delay slot
166 ;; as a bonus 7th parameter, we give the location on the stack
167 ;; of the register structure itself. some syscalls need this.
169 push $sp
171 ;; the parameter carrying registers r10, r11, r12 and 13 are intact.
172 ;; the fifth and sixth parameters (if any) was in mof and srp
173 ;; respectively, and we need to put them on the stack.
175 push $srp
176 push $mof
178 jsr [$r9+sys_call_table] ; actually do the system call
179 addq 3*4, $sp ; pop the mof, srp and regs parameters
180 move.d $r10, [$sp+PT_r10] ; save the return value
182 moveq 1, $r9 ; "parameter" to ret_from_sys_call to show it was a sys call
184 ;; fall through into ret_from_sys_call to return
186 ret_from_sys_call:
187 ;; r9 is a parameter - if >=1 we came from a syscall, if 0, from an irq
189 ;; get the current task-struct pointer (see top for defs)
191 movs.w -8192, $r0 ; THREAD_SIZE == 8192
192 and.d $sp, $r0
194 di ; make sure need_resched and sigpending don't change
195 move.d [$r0+TI_flags],$r1
196 and.d _TIF_ALLWORK_MASK, $r1
197 bne _syscall_exit_work
198 nop
200 _Rexit:
201 ;; this epilogue MUST match the prologues in multiple_interrupt, irq.h and ptregs.h
202 pop $r10 ; frametype
203 bne _RBFexit ; was not CRIS_FRAME_NORMAL, handle otherwise
204 addq 4, $sp ; skip orig_r10, in delayslot
205 movem [$sp+], $r13 ; registers r0-r13
206 pop $mof ; multiply overflow register
207 pop $dccr ; condition codes
208 pop $srp ; subroutine return pointer
209 ;; now we have a 4-word SBFS frame which we do not want to restore
210 ;; using RBF since it was not stacked with SBFS. instead we would like to
211 ;; just get the PC value to restart it with, and skip the rest of
212 ;; the frame.
213 ;; Also notice that it's important to use instructions here that
214 ;; keep the interrupts disabled (since we've already popped DCCR)
215 move [$sp=$sp+16], $p8; pop the SBFS frame from the sp
216 jmpu [$sp-16] ; return through the irp field in the sbfs frame
218 _RBFexit:
219 movem [$sp+], $r13 ; registers r0-r13, in delay slot
220 pop $mof ; multiply overflow register
221 pop $dccr ; condition codes
222 pop $srp ; subroutine return pointer
223 rbf [$sp+] ; return by popping the CPU status
225 ;; We get here after doing a syscall if extra work might need to be done
226 ;; perform syscall exit tracing if needed
228 _syscall_exit_work:
229 ;; $r0 contains current at this point and irq's are disabled
231 move.d [$r0+TI_flags], $r1
232 btstq TIF_SYSCALL_TRACE, $r1
233 bpl _work_pending
234 nop
236 ei
238 move.d $r9, $r1 ; preserve r9
239 jsr do_syscall_trace
240 move.d $r1, $r9
242 ba _resume_userspace
243 nop
245 _work_pending:
246 move.d [$r0+TI_flags], $r1
247 btstq TIF_NEED_RESCHED, $r1
248 bpl _work_notifysig ; was neither trace nor sched, must be signal/notify
249 nop
251 _work_resched:
252 move.d $r9, $r1 ; preserve r9
253 jsr schedule
254 move.d $r1, $r9
255 di
257 move.d [$r0+TI_flags], $r1
258 and.d _TIF_WORK_MASK, $r1; ignore the syscall trace counter
259 beq _Rexit
260 nop
261 btstq TIF_NEED_RESCHED, $r1
262 bmi _work_resched ; current->work.need_resched
263 nop
265 _work_notifysig:
266 ;; deal with pending signals and notify-resume requests
268 move.d $r9, $r10 ; do_notify_resume syscall/irq param
269 move.d $sp, $r11 ; the regs param
270 move.d $r1, $r12 ; the thread_info_flags parameter
271 jsr do_notify_resume
273 ba _Rexit
274 nop
276 ;; We get here as a sidetrack when we've entered a syscall with the
277 ;; trace-bit set. We need to call do_syscall_trace and then continue
278 ;; with the call.
280 _syscall_trace_entry:
281 ;; PT_r10 in the frame contains -ENOSYS as required, at this point
283 jsr do_syscall_trace
285 ;; now re-enter the syscall code to do the syscall itself
286 ;; we need to restore $r9 here to contain the wanted syscall, and
287 ;; the other parameter-bearing registers
289 move.d [$sp+PT_r9], $r9
290 move.d [$sp+PT_orig_r10], $r10 ; PT_r10 is already filled with -ENOSYS.
291 move.d [$sp+PT_r11], $r11
292 move.d [$sp+PT_r12], $r12
293 move.d [$sp+PT_r13], $r13
294 move [$sp+PT_mof], $mof
295 move [$sp+PT_srp], $srp
297 ba _syscall_traced
298 nop
300 ;; resume performs the actual task-switching, by switching stack pointers
301 ;; input arguments: r10 = prev, r11 = next, r12 = thread offset in task struct
302 ;; returns old current in r10
303 ;;
304 ;; TODO: see the i386 version. The switch_to which calls resume in our version
305 ;; could really be an inline asm of this.
307 resume:
308 push $srp ; we keep the old/new PC on the stack
309 add.d $r12, $r10 ; r10 = current tasks tss
310 move $dccr, [$r10+THREAD_dccr]; save irq enable state
311 di
313 move $usp, [$r10+ THREAD_usp] ; save user-mode stackpointer
315 ;; See copy_thread for the reason why register R9 is saved.
316 subq 10*4, $sp
317 movem $r9, [$sp] ; save non-scratch registers and R9.
319 move.d $sp, [$r10+THREAD_ksp] ; save the kernel stack pointer for the old task
320 move.d $sp, $r10 ; return last running task in r10
321 and.d -8192, $r10 ; get thread_info from stackpointer
322 move.d [$r10+TI_task], $r10 ; get task
323 add.d $r12, $r11 ; find the new tasks tss
324 move.d [$r11+THREAD_ksp], $sp ; switch into the new stackframe by restoring kernel sp
326 movem [$sp+], $r9 ; restore non-scratch registers and R9.
328 move [$r11+THREAD_usp], $usp ; restore user-mode stackpointer
330 move [$r11+THREAD_dccr], $dccr ; restore irq enable status
331 jump [$sp+] ; restore PC
333 ;; This is the MMU bus fault handler.
334 ;; It needs to stack the CPU status and overall is different
335 ;; from the other interrupt handlers.
337 mmu_bus_fault:
338 ;; For refills we try to do a quick page table lookup. If it is
339 ;; a real fault we let the mm subsystem handle it.
341 ;; the first longword in the sbfs frame was the interrupted PC
342 ;; which fits nicely with the "IRP" slot in pt_regs normally used to
343 ;; contain the return address. used by Oops to print kernel errors.
344 sbfs [$sp=$sp-16] ; push the internal CPU status
345 push $dccr
346 di
347 subq 2*4, $sp
348 movem $r1, [$sp]
349 move.d [R_MMU_CAUSE], $r1
350 ;; ETRAX 100LX TR89 bugfix: if the second half of an unaligned
351 ;; write causes a MMU-fault, it will not be restarted correctly.
352 ;; This could happen if a write crosses a page-boundary and the
353 ;; second page is not yet COW'ed or even loaded. The workaround
354 ;; is to clear the unaligned bit in the CPU status record, so
355 ;; that the CPU will rerun both the first and second halves of
356 ;; the instruction. This will not have any sideeffects unless
357 ;; the first half goes to any device or memory that can't be
358 ;; written twice, and which is mapped through the MMU.
359 ;;
360 ;; We only need to do this for writes.
361 btstq 8, $r1 ; Write access?
362 bpl 1f
363 nop
364 move.d [$sp+16], $r0 ; Clear unaligned bit in csrinstr
365 and.d ~(1<<5), $r0
366 move.d $r0, [$sp+16]
367 1: btstq 12, $r1 ; Refill?
368 bpl 2f
369 lsrq 24, $r1 ; Get PGD index (bit 24-31)
370 move.d [current_pgd], $r0 ; PGD for the current process
371 move.d [$r0+$r1.d], $r0 ; Get PMD
372 beq 2f
373 nop
374 and.w PAGE_MASK, $r0 ; Remove PMD flags
375 move.d [R_MMU_CAUSE], $r1
376 lsrq PAGE_SHIFT, $r1
377 and.d 0x7ff, $r1 ; Get PTE index into PGD (bit 13-23)
378 move.d [$r0+$r1.d], $r1 ; Get PTE
379 beq 2f
380 nop
381 ;; Store in TLB
382 move.d $r1, [R_TLB_LO]
383 ;; Return
384 movem [$sp+], $r1
385 pop $dccr
386 rbf [$sp+] ; return by popping the CPU status
388 2: ; PMD or PTE missing, let the mm subsystem fix it up.
389 movem [$sp+], $r1
390 pop $dccr
392 ; Ok, not that easy, pass it on to the mm subsystem
393 ; The MMU status record is now on the stack
394 push $srp ; make a stackframe similar to pt_regs
395 push $dccr
396 push $mof
397 di
398 subq 14*4, $sp
399 movem $r13, [$sp]
400 push $r10 ; dummy orig_r10
401 moveq 1, $r10
402 push $r10 ; frametype == 1, BUSFAULT frame type
404 move.d $sp, $r10 ; pt_regs argument to handle_mmu_bus_fault
406 jsr handle_mmu_bus_fault ; in arch/cris/arch-v10/mm/fault.c
408 ;; now we need to return through the normal path, we cannot just
409 ;; do the RBFexit since we might have killed off the running
410 ;; process due to a SEGV, scheduled due to a page blocking or
411 ;; whatever.
413 moveq 0, $r9 ; busfault is equivalent to an irq
415 ba ret_from_intr
416 nop
418 ;; special handlers for breakpoint and NMI
419 hwbreakpoint:
420 push $dccr
421 di
422 push $r10
423 push $r11
424 move.d [hw_bp_trig_ptr],$r10
425 move $brp,$r11
426 move.d $r11,[$r10+]
427 move.d $r10,[hw_bp_trig_ptr]
428 1: pop $r11
429 pop $r10
430 pop $dccr
431 retb
432 nop
434 IRQ1_interrupt:
435 ;; this prologue MUST match the one in irq.h and the struct in ptregs.h!!!
436 move $brp,[$sp=$sp-16]; instruction pointer and room for a fake SBFS frame
437 push $srp
438 push $dccr
439 push $mof
440 di
441 subq 14*4, $sp
442 movem $r13, [$sp]
443 push $r10 ; push orig_r10
444 clear.d [$sp=$sp-4] ; frametype == 0, normal frame
446 ;; If there is a glitch on the NMI pin shorter than ~100ns
447 ;; (i.e. non-active by the time we get here) then the nmi_pin bit
448 ;; in R_IRQ_MASK0_RD will already be cleared. The watchdog_nmi bit
449 ;; is cleared by us however (when feeding the watchdog), which is why
450 ;; we use that bit to determine what brought us here.
452 move.d [R_IRQ_MASK0_RD], $r1 ; External NMI or watchdog?
453 and.d (1<<30), $r1
454 bne wdog
455 move.d $sp, $r10
456 jsr handle_nmi
457 setf m ; Enable NMI again
458 ba _Rexit ; Return the standard way
459 nop
460 wdog:
461 #if defined(CONFIG_ETRAX_WATCHDOG)
462 ;; Check if we're waiting for reset to happen, as signalled by
463 ;; hard_reset_now setting cause_of_death to a magic value. If so, just
464 ;; get stuck until reset happens.
465 .comm cause_of_death, 4 ;; Don't declare this anywhere.
466 move.d [cause_of_death], $r10
467 cmp.d 0xbedead, $r10
468 _killed_by_death:
469 beq _killed_by_death
470 nop
472 ;; We'll see this in ksymoops dumps.
473 Watchdog_bite:
475 #ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
476 ;; We just restart the watchdog here to be sure we dont get
477 ;; hit while printing the watchdogmsg below
478 ;; This restart is compatible with the rest of the C-code, so
479 ;; the C-code can keep restarting the watchdog after this point.
480 ;; The non-NICE_DOGGY code below though, disables the possibility
481 ;; to restart since it changes the watchdog key, to avoid any
482 ;; buggy loops etc. keeping the watchdog alive after this.
483 jsr reset_watchdog
484 #else
486 ;; We need to extend the 3.3ms after the NMI at watchdog bite, so we have
487 ;; time for an oops-dump over a 115k2 serial wire. Another 100ms should do.
489 ;; Change the watchdog key to an arbitrary 3-bit value and restart the
490 ;; watchdog.
491 #define WD_INIT 2
492 moveq IO_FIELD (R_WATCHDOG, key, WD_INIT), $r10
493 move.d R_WATCHDOG, $r11
495 move.d $r10, [$r11]
496 moveq IO_FIELD (R_WATCHDOG, key, \
497 IO_EXTRACT (R_WATCHDOG, key, \
498 IO_MASK (R_WATCHDOG, key)) \
499 ^ WD_INIT) \
500 | IO_STATE (R_WATCHDOG, enable, start), $r10
501 move.d $r10, [$r11]
503 #endif
505 ;; Note that we don't do "setf m" here (or after two necessary NOPs),
506 ;; since *not* doing that saves us from re-entrancy checks. We don't want
507 ;; to get here again due to possible subsequent NMIs; we want the watchdog
508 ;; to reset us.
510 move.d _watchdogmsg,$r10
511 jsr printk
513 move.d $sp, $r10
514 jsr watchdog_bite_hook
516 ;; This nop is here so we see the "Watchdog_bite" label in ksymoops dumps
517 ;; rather than "spurious_interrupt".
518 nop
519 ;; At this point we drop down into spurious_interrupt, which will do a
520 ;; hard reset.
522 .section .rodata,"a"
523 _watchdogmsg:
524 .ascii "Oops: bitten by watchdog\n\0"
525 .previous
527 #endif /* CONFIG_ETRAX_WATCHDOG */
529 spurious_interrupt:
530 di
531 jump hard_reset_now
533 ;; this handles the case when multiple interrupts arrive at the same time
534 ;; we jump to the first set interrupt bit in a priority fashion
535 ;; the hardware will call the unserved interrupts after the handler finishes
537 multiple_interrupt:
538 ;; this prologue MUST match the one in irq.h and the struct in ptregs.h!!!
539 move $irp,[$sp=$sp-16]; instruction pointer and room for a fake SBFS frame
540 push $srp
541 push $dccr
542 push $mof
543 di
544 subq 14*4, $sp
545 movem $r13, [$sp]
546 push $r10 ; push orig_r10
547 clear.d [$sp=$sp-4] ; frametype == 0, normal frame
549 move.d $sp, $r10
550 jsr do_multiple_IRQ
552 jump ret_from_intr
554 do_sigtrap:
555 ;;
556 ;; SIGTRAP the process that executed the break instruction.
557 ;; Make a frame that Rexit in entry.S expects.
558 ;;
559 move $brp, [$sp=$sp-16] ; Push BRP while faking a cpu status record.
560 push $srp ; Push subroutine return pointer.
561 push $dccr ; Push condition codes.
562 push $mof ; Push multiply overflow reg.
563 di ; Need to disable irq's at this point.
564 subq 14*4, $sp ; Make room for r0-r13.
565 movem $r13, [$sp] ; Push the r0-r13 registers.
566 push $r10 ; Push orig_r10.
567 clear.d [$sp=$sp-4] ; Frametype - this is a normal stackframe.
569 movs.w -8192,$r9 ; THREAD_SIZE == 8192
570 and.d $sp, $r9
571 move.d [$r9+TI_task], $r10
572 move.d [$r10+TASK_pid], $r10 ; current->pid as arg1.
573 moveq 5, $r11 ; SIGTRAP as arg2.
574 jsr sys_kill
575 jump ret_from_intr ; Use the return routine for interrupts.
577 gdb_handle_breakpoint:
578 push $dccr
579 push $r0
580 #ifdef CONFIG_ETRAX_KGDB
581 move $dccr, $r0 ; U-flag not affected by previous insns.
582 btstq 8, $r0 ; Test the U-flag.
583 bmi _ugdb_handle_breakpoint ; Go to user mode debugging.
584 nop ; Empty delay slot (cannot pop r0 here).
585 pop $r0 ; Restore r0.
586 ba kgdb_handle_breakpoint ; Go to kernel debugging.
587 pop $dccr ; Restore dccr in delay slot.
588 #endif
590 _ugdb_handle_breakpoint:
591 move $brp, $r0 ; Use r0 temporarily for calculation.
592 subq 2, $r0 ; Set to address of previous instruction.
593 move $r0, $brp
594 pop $r0 ; Restore r0.
595 ba do_sigtrap ; SIGTRAP the offending process.
596 pop $dccr ; Restore dccr in delay slot.
598 .data
600 hw_bp_trigs:
601 .space 64*4
602 hw_bp_trig_ptr:
603 .dword hw_bp_trigs
605 .section .rodata,"a"
606 sys_call_table:
607 .long sys_restart_syscall /* 0 - old "setup()" system call, used for restarting */
608 .long sys_exit
609 .long sys_fork
610 .long sys_read
611 .long sys_write
612 .long sys_open /* 5 */
613 .long sys_close
614 .long sys_waitpid
615 .long sys_creat
616 .long sys_link
617 .long sys_unlink /* 10 */
618 .long sys_execve
619 .long sys_chdir
620 .long sys_time
621 .long sys_mknod
622 .long sys_chmod /* 15 */
623 .long sys_lchown16
624 .long sys_ni_syscall /* old break syscall holder */
625 .long sys_stat
626 .long sys_lseek
627 .long sys_getpid /* 20 */
628 .long sys_mount
629 .long sys_oldumount
630 .long sys_setuid16
631 .long sys_getuid16
632 .long sys_stime /* 25 */
633 .long sys_ptrace
634 .long sys_alarm
635 .long sys_fstat
636 .long sys_pause
637 .long sys_utime /* 30 */
638 .long sys_ni_syscall /* old stty syscall holder */
639 .long sys_ni_syscall /* old gtty syscall holder */
640 .long sys_access
641 .long sys_nice
642 .long sys_ni_syscall /* 35 old ftime syscall holder */
643 .long sys_sync
644 .long sys_kill
645 .long sys_rename
646 .long sys_mkdir
647 .long sys_rmdir /* 40 */
648 .long sys_dup
649 .long sys_pipe
650 .long sys_times
651 .long sys_ni_syscall /* old prof syscall holder */
652 .long sys_brk /* 45 */
653 .long sys_setgid16
654 .long sys_getgid16
655 .long sys_signal
656 .long sys_geteuid16
657 .long sys_getegid16 /* 50 */
658 .long sys_acct
659 .long sys_umount /* recycled never used phys( */
660 .long sys_ni_syscall /* old lock syscall holder */
661 .long sys_ioctl
662 .long sys_fcntl /* 55 */
663 .long sys_ni_syscall /* old mpx syscall holder */
664 .long sys_setpgid
665 .long sys_ni_syscall /* old ulimit syscall holder */
666 .long sys_ni_syscall /* old sys_olduname holder */
667 .long sys_umask /* 60 */
668 .long sys_chroot
669 .long sys_ustat
670 .long sys_dup2
671 .long sys_getppid
672 .long sys_getpgrp /* 65 */
673 .long sys_setsid
674 .long sys_sigaction
675 .long sys_sgetmask
676 .long sys_ssetmask
677 .long sys_setreuid16 /* 70 */
678 .long sys_setregid16
679 .long sys_sigsuspend
680 .long sys_sigpending
681 .long sys_sethostname
682 .long sys_setrlimit /* 75 */
683 .long sys_old_getrlimit
684 .long sys_getrusage
685 .long sys_gettimeofday
686 .long sys_settimeofday
687 .long sys_getgroups16 /* 80 */
688 .long sys_setgroups16
689 .long sys_select /* was old_select in Linux/E100 */
690 .long sys_symlink
691 .long sys_lstat
692 .long sys_readlink /* 85 */
693 .long sys_uselib
694 .long sys_swapon
695 .long sys_reboot
696 .long sys_old_readdir
697 .long sys_old_mmap /* 90 */
698 .long sys_munmap
699 .long sys_truncate
700 .long sys_ftruncate
701 .long sys_fchmod
702 .long sys_fchown16 /* 95 */
703 .long sys_getpriority
704 .long sys_setpriority
705 .long sys_ni_syscall /* old profil syscall holder */
706 .long sys_statfs
707 .long sys_fstatfs /* 100 */
708 .long sys_ni_syscall /* sys_ioperm in i386 */
709 .long sys_socketcall
710 .long sys_syslog
711 .long sys_setitimer
712 .long sys_getitimer /* 105 */
713 .long sys_newstat
714 .long sys_newlstat
715 .long sys_newfstat
716 .long sys_ni_syscall /* old sys_uname holder */
717 .long sys_ni_syscall /* 110 */ /* sys_iopl in i386 */
718 .long sys_vhangup
719 .long sys_ni_syscall /* old "idle" system call */
720 .long sys_ni_syscall /* vm86old in i386 */
721 .long sys_wait4
722 .long sys_swapoff /* 115 */
723 .long sys_sysinfo
724 .long sys_ipc
725 .long sys_fsync
726 .long sys_sigreturn
727 .long sys_clone /* 120 */
728 .long sys_setdomainname
729 .long sys_newuname
730 .long sys_ni_syscall /* sys_modify_ldt */
731 .long sys_adjtimex
732 .long sys_mprotect /* 125 */
733 .long sys_sigprocmask
734 .long sys_ni_syscall /* old "create_module" */
735 .long sys_init_module
736 .long sys_delete_module
737 .long sys_ni_syscall /* 130: old "get_kernel_syms" */
738 .long sys_quotactl
739 .long sys_getpgid
740 .long sys_fchdir
741 .long sys_bdflush
742 .long sys_sysfs /* 135 */
743 .long sys_personality
744 .long sys_ni_syscall /* for afs_syscall */
745 .long sys_setfsuid16
746 .long sys_setfsgid16
747 .long sys_llseek /* 140 */
748 .long sys_getdents
749 .long sys_select
750 .long sys_flock
751 .long sys_msync
752 .long sys_readv /* 145 */
753 .long sys_writev
754 .long sys_getsid
755 .long sys_fdatasync
756 .long sys_sysctl
757 .long sys_mlock /* 150 */
758 .long sys_munlock
759 .long sys_mlockall
760 .long sys_munlockall
761 .long sys_sched_setparam
762 .long sys_sched_getparam /* 155 */
763 .long sys_sched_setscheduler
764 .long sys_sched_getscheduler
765 .long sys_sched_yield
766 .long sys_sched_get_priority_max
767 .long sys_sched_get_priority_min /* 160 */
768 .long sys_sched_rr_get_interval
769 .long sys_nanosleep
770 .long sys_mremap
771 .long sys_setresuid16
772 .long sys_getresuid16 /* 165 */
773 .long sys_ni_syscall /* sys_vm86 */
774 .long sys_ni_syscall /* Old sys_query_module */
775 .long sys_poll
776 .long sys_ni_syscall /* old nfsservctl */
777 .long sys_setresgid16 /* 170 */
778 .long sys_getresgid16
779 .long sys_prctl
780 .long sys_rt_sigreturn
781 .long sys_rt_sigaction
782 .long sys_rt_sigprocmask /* 175 */
783 .long sys_rt_sigpending
784 .long sys_rt_sigtimedwait
785 .long sys_rt_sigqueueinfo
786 .long sys_rt_sigsuspend
787 .long sys_pread64 /* 180 */
788 .long sys_pwrite64
789 .long sys_chown16
790 .long sys_getcwd
791 .long sys_capget
792 .long sys_capset /* 185 */
793 .long sys_sigaltstack
794 .long sys_sendfile
795 .long sys_ni_syscall /* streams1 */
796 .long sys_ni_syscall /* streams2 */
797 .long sys_vfork /* 190 */
798 .long sys_getrlimit
799 .long sys_mmap2 /* mmap_pgoff */
800 .long sys_truncate64
801 .long sys_ftruncate64
802 .long sys_stat64 /* 195 */
803 .long sys_lstat64
804 .long sys_fstat64
805 .long sys_lchown
806 .long sys_getuid
807 .long sys_getgid /* 200 */
808 .long sys_geteuid
809 .long sys_getegid
810 .long sys_setreuid
811 .long sys_setregid
812 .long sys_getgroups /* 205 */
813 .long sys_setgroups
814 .long sys_fchown
815 .long sys_setresuid
816 .long sys_getresuid
817 .long sys_setresgid /* 210 */
818 .long sys_getresgid
819 .long sys_chown
820 .long sys_setuid
821 .long sys_setgid
822 .long sys_setfsuid /* 215 */
823 .long sys_setfsgid
824 .long sys_pivot_root
825 .long sys_mincore
826 .long sys_madvise
827 .long sys_getdents64 /* 220 */
828 .long sys_fcntl64
829 .long sys_ni_syscall /* reserved for TUX */
830 .long sys_ni_syscall
831 .long sys_gettid
832 .long sys_readahead /* 225 */
833 .long sys_setxattr
834 .long sys_lsetxattr
835 .long sys_fsetxattr
836 .long sys_getxattr
837 .long sys_lgetxattr /* 230 */
838 .long sys_fgetxattr
839 .long sys_listxattr
840 .long sys_llistxattr
841 .long sys_flistxattr
842 .long sys_removexattr /* 235 */
843 .long sys_lremovexattr
844 .long sys_fremovexattr
845 .long sys_tkill
846 .long sys_sendfile64
847 .long sys_futex /* 240 */
848 .long sys_sched_setaffinity
849 .long sys_sched_getaffinity
850 .long sys_ni_syscall /* sys_set_thread_area */
851 .long sys_ni_syscall /* sys_get_thread_area */
852 .long sys_io_setup /* 245 */
853 .long sys_io_destroy
854 .long sys_io_getevents
855 .long sys_io_submit
856 .long sys_io_cancel
857 .long sys_fadvise64 /* 250 */
858 .long sys_ni_syscall
859 .long sys_exit_group
860 .long sys_lookup_dcookie
861 .long sys_epoll_create
862 .long sys_epoll_ctl /* 255 */
863 .long sys_epoll_wait
864 .long sys_remap_file_pages
865 .long sys_set_tid_address
866 .long sys_timer_create
867 .long sys_timer_settime /* 260 */
868 .long sys_timer_gettime
869 .long sys_timer_getoverrun
870 .long sys_timer_delete
871 .long sys_clock_settime
872 .long sys_clock_gettime /* 265 */
873 .long sys_clock_getres
874 .long sys_clock_nanosleep
875 .long sys_statfs64
876 .long sys_fstatfs64
877 .long sys_tgkill /* 270 */
878 .long sys_utimes
879 .long sys_fadvise64_64
880 .long sys_ni_syscall /* sys_vserver */
881 .long sys_ni_syscall /* sys_mbind */
882 .long sys_ni_syscall /* 275 sys_get_mempolicy */
883 .long sys_ni_syscall /* sys_set_mempolicy */
884 .long sys_mq_open
885 .long sys_mq_unlink
886 .long sys_mq_timedsend
887 .long sys_mq_timedreceive /* 280 */
888 .long sys_mq_notify
889 .long sys_mq_getsetattr
890 .long sys_ni_syscall
891 .long sys_waitid
892 .long sys_ni_syscall /* 285 */ /* available */
893 .long sys_add_key
894 .long sys_request_key
895 .long sys_keyctl
896 .long sys_ioprio_set
897 .long sys_ioprio_get /* 290 */
898 .long sys_inotify_init
899 .long sys_inotify_add_watch
900 .long sys_inotify_rm_watch
901 .long sys_migrate_pages
902 .long sys_openat /* 295 */
903 .long sys_mkdirat
904 .long sys_mknodat
905 .long sys_fchownat
906 .long sys_futimesat
907 .long sys_fstatat64 /* 300 */
908 .long sys_unlinkat
909 .long sys_renameat
910 .long sys_linkat
911 .long sys_symlinkat
912 .long sys_readlinkat /* 305 */
913 .long sys_fchmodat
914 .long sys_faccessat
915 .long sys_pselect6
916 .long sys_ppoll
917 .long sys_unshare /* 310 */
918 .long sys_set_robust_list
919 .long sys_get_robust_list
920 .long sys_splice
921 .long sys_sync_file_range
922 .long sys_tee /* 315 */
923 .long sys_vmsplice
924 .long sys_move_pages
925 .long sys_getcpu
926 .long sys_epoll_pwait
927 .long sys_utimensat /* 320 */
928 .long sys_signalfd
929 .long sys_timerfd_create
930 .long sys_eventfd
931 .long sys_fallocate
932 .long sys_timerfd_settime /* 325 */
933 .long sys_timerfd_gettime
934 .long sys_signalfd4
935 .long sys_eventfd2
936 .long sys_epoll_create1
937 .long sys_dup3 /* 330 */
938 .long sys_pipe2
939 .long sys_inotify_init1
940 .long sys_preadv
941 .long sys_pwritev
942 .long sys_setns /* 335 */
943 .long sys_name_to_handle_at
944 .long sys_open_by_handle_at
945 .long sys_rt_tgsigqueueinfo
946 .long sys_perf_event_open
947 .long sys_recvmmsg /* 340 */
948 .long sys_accept4
949 .long sys_fanotify_init
950 .long sys_fanotify_mark
951 .long sys_prlimit64
952 .long sys_clock_adjtime /* 345 */
953 .long sys_syncfs
954 .long sys_sendmmsg
955 .long sys_process_vm_readv
956 .long sys_process_vm_writev
957 .long sys_kcmp /* 350 */
958 .long sys_finit_module
959 .long sys_sched_setattr
960 .long sys_sched_getattr
961 .long sys_renameat2
962 .long sys_seccomp /* 355 */
963 .long sys_getrandom
964 .long sys_memfd_create
965 .long sys_bpf
966 .long sys_execveat
968 /*
969 * NOTE!! This doesn't have to be exact - we just have
970 * to make sure we have _enough_ of the "sys_ni_syscall"
971 * entries. Don't panic if you notice that this hasn't
972 * been shrunk every time we add a new system call.
973 */
975 .rept NR_syscalls-(.-sys_call_table)/4
976 .long sys_ni_syscall
977 .endr