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 */
8
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 */
22
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>
32
33	;; functions exported from this file
34
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
48
49	;; below are various parts of system_call which are not in the fast-path
50
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
77
78	; Called at exit from fork. schedule_tail must be called to drop
79	; spinlock if CONFIG_PREEMPT
80ret_from_fork:
81	jsr schedule_tail
82	ba  ret_from_sys_call
83	nop
84
85ret_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 $dccr, because that does not necessarily
89	;; reflect what mode we'll return into.
90
91	move.d	[$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
95
96_resume_userspace:
97	di			; so need_resched and sigpending don't change
98
99	movs.w	-8192, $r0	; THREAD_SIZE == 8192
100	and.d	$sp, $r0
101
102	move.d	[$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
108
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..
124
125system_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
135
136	movs.w	-ENOSYS, $r0
137	move.d	$r0, [$sp+PT_r10]	; put the default return value in r10 in the frame
138
139	;; check if this process is syscall-traced
140
141	movs.w	-8192, $r0	; THREAD_SIZE == 8192
142	and.d	$sp, $r0
143
144	move.d	[$r0+TI_flags], $r0
145	btstq   TIF_SYSCALL_TRACE, $r0
146	bmi	_syscall_trace_entry
147	nop
148
149_syscall_traced:
150
151	;; check for sanity in the requested syscall number
152
153	cmpu.w	NR_syscalls, $r9
154	bcc	ret_from_sys_call
155	lslq	2, $r9		;  multiply by 4, in the delay slot
156
157	;; as a bonus 7th parameter, we give the location on the stack
158	;; of the register structure itself. some syscalls need this.
159
160	push	$sp
161
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.
165
166	push	$srp
167	push	$mof
168
169	jsr	[$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
172
173	moveq	1, $r9		; "parameter" to ret_from_sys_call to show it was a sys call
174
175	;; fall through into ret_from_sys_call to return
176
177ret_from_sys_call:
178	;; r9 is a parameter - if >=1 we came from a syscall, if 0, from an irq
179
180	;; get the current task-struct pointer (see top for defs)
181
182	movs.w	-8192, $r0	; THREAD_SIZE == 8192
183	and.d	$sp, $r0
184
185	di			; make sure need_resched and sigpending don't change
186	move.d	[$r0+TI_flags],$r1
187	and.d	_TIF_ALLWORK_MASK, $r1
188	bne	_syscall_exit_work
189	nop
190
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
208
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
215
216	;; We get here after doing a syscall if extra work might need to be done
217	;; perform syscall exit tracing if needed
218
219_syscall_exit_work:
220	;; $r0 contains current at this point and irq's are disabled
221
222	move.d  [$r0+TI_flags], $r1
223	btstq	TIF_SYSCALL_TRACE, $r1
224	bpl	_work_pending
225	nop
226
227	ei
228
229	move.d	$r9, $r1	; preserve r9
230	jsr	do_syscall_trace
231	move.d	$r1, $r9
232
233	ba	_resume_userspace
234	nop
235
236_work_pending:
237	move.d  [$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
241
242_work_resched:
243	move.d	$r9, $r1	; preserve r9
244	jsr	schedule
245	move.d	$r1, $r9
246	di
247
248	move.d	[$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
255
256_work_notifysig:
257	;; deal with pending signals and notify-resume requests
258
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
263
264	ba _Rexit
265	nop
266
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.
270
271_syscall_trace_entry:
272	;; PT_r10 in the frame contains -ENOSYS as required, at this point
273
274	jsr	do_syscall_trace
275
276	;; now re-enter the syscall code to do the syscall itself
277	;; we need to restore $r9 here to contain the wanted syscall, and
278	;; the other parameter-bearing registers
279
280	move.d	[$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
287
288	ba	_syscall_traced
289	nop
290
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.
297
298resume:
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
303
304	move	$usp, [$r10+ THREAD_usp] ; save user-mode stackpointer
305
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.
309
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], $sp	 ; switch into the new stackframe by restoring kernel sp
316
317	movem	[$sp+], $r9		 ; restore non-scratch registers and R9.
318
319	move	[$r11+THREAD_usp], $usp ; restore user-mode stackpointer
320
321	move	[$r11+THREAD_dccr], $dccr ; restore irq enable status
322	jump	[$sp+]		         ; restore PC
323
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.
327
328mmu_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.
331
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]
3581:	btstq	12, $r1		   ; Refill?
359	bpl	2f
360	lsrq	24, $r1     ; Get PGD index (bit 24-31)
361	move.d  [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
378
3792:	; PMD or PTE missing, let the mm subsystem fix it up.
380	movem	[$sp+], $r1
381	pop	$dccr
382
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
394
395	move.d	$sp, $r10	; pt_regs argument to handle_mmu_bus_fault
396
397	jsr	handle_mmu_bus_fault  ; in arch/cris/arch-v10/mm/fault.c
398
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.
403
404	moveq	0, $r9		; busfault is equivalent to an irq
405
406	ba	ret_from_intr
407	nop
408
409	;; special handlers for breakpoint and NMI
410hwbreakpoint:
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]
4191:	pop	$r11
420	pop	$r10
421	pop	$dccr
422	retb
423	nop
424
425IRQ1_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
436
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.
442
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
451wdog:
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
462
463;; We'll see this in ksymoops dumps.
464Watchdog_bite:
465
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
476
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.
479
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
485
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]
493
494#endif
495
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.
500
501	move.d	_watchdogmsg,$r10
502	jsr	printk
503
504	move.d	$sp, $r10
505	jsr	watchdog_bite_hook
506
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.
512
513	.section .rodata,"a"
514_watchdogmsg:
515	.ascii	"Oops: bitten by watchdog\n\0"
516	.previous
517
518#endif /* CONFIG_ETRAX_WATCHDOG and not CONFIG_SVINTO_SIM */
519
520spurious_interrupt:
521	di
522	jump hard_reset_now
523
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
527
528multiple_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
539
540	move.d  $sp, $r10
541	jsr	do_multiple_IRQ
542
543	jump    ret_from_intr
544
545do_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=$sp-4]		; Frametype - this is a normal stackframe.
559
560	movs.w	-8192,$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.
567
568gdb_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
580
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.
588
589	.global kernel_execve
590kernel_execve:
591	move.d __NR_execve, $r9
592	break 13
593	ret
594	nop
595
596	.data
597
598hw_bp_trigs:
599	.space 64*4
600hw_bp_trig_ptr:
601	.dword hw_bp_trigs
602
603	.section .rodata,"a"
604sys_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 sys_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_ni_syscall    /* old 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
940	.long sys_setns			/* 335 */
941
942        /*
943         * NOTE!! This doesn't have to be exact - we just have
944         * to make sure we have _enough_ of the "sys_ni_syscall"
945         * entries. Don't panic if you notice that this hasn't
946         * been shrunk every time we add a new system call.
947         */
948
949	.rept NR_syscalls-(.-sys_call_table)/4
950		.long sys_ni_syscall
951	.endr
952
953