summaryrefslogtreecommitdiff
path: root/arch/v850/kernel/entry.S
blob: 895e27b1d839f795491fa84a6464e5e929b1f373 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
/*
 * arch/v850/kernel/entry.S -- Low-level system-call handling, trap handlers,
 *	and context-switching
 *
 *  Copyright (C) 2001,02,03  NEC Electronics Corporation
 *  Copyright (C) 2001,02,03  Miles Bader <miles@gnu.org>
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License.  See the file COPYING in the main directory of this
 * archive for more details.
 *
 * Written by Miles Bader <miles@gnu.org>
 */

#include <linux/sys.h>

#include <asm/entry.h>
#include <asm/current.h>
#include <asm/thread_info.h>
#include <asm/clinkage.h>
#include <asm/processor.h>
#include <asm/irq.h>
#include <asm/errno.h>

#include <asm/asm-consts.h>


/* Make a slightly more convenient alias for C_SYMBOL_NAME.  */
#define CSYM	C_SYMBOL_NAME


/* The offset of the struct pt_regs in a state-save-frame on the stack.  */
#define PTO	STATE_SAVE_PT_OFFSET


/* Save argument registers to the state-save-frame pointed to by EP.  */
#define SAVE_ARG_REGS							      \
	sst.w	r6, PTO+PT_GPR(6)[ep];					      \
	sst.w	r7, PTO+PT_GPR(7)[ep];					      \
	sst.w	r8, PTO+PT_GPR(8)[ep];					      \
	sst.w	r9, PTO+PT_GPR(9)[ep]
/* Restore argument registers from the state-save-frame pointed to by EP.  */
#define RESTORE_ARG_REGS						      \
	sld.w	PTO+PT_GPR(6)[ep], r6;					      \
	sld.w	PTO+PT_GPR(7)[ep], r7;					      \
	sld.w	PTO+PT_GPR(8)[ep], r8;					      \
	sld.w	PTO+PT_GPR(9)[ep], r9

/* Save value return registers to the state-save-frame pointed to by EP.  */
#define SAVE_RVAL_REGS							      \
	sst.w	r10, PTO+PT_GPR(10)[ep];				      \
	sst.w	r11, PTO+PT_GPR(11)[ep]
/* Restore value return registers from the state-save-frame pointed to by EP.  */
#define RESTORE_RVAL_REGS						      \
	sld.w	PTO+PT_GPR(10)[ep], r10;				      \
	sld.w	PTO+PT_GPR(11)[ep], r11


#define SAVE_CALL_CLOBBERED_REGS_BEFORE_ARGS				      \
	sst.w	r1, PTO+PT_GPR(1)[ep];					      \
	sst.w	r5, PTO+PT_GPR(5)[ep]
#define SAVE_CALL_CLOBBERED_REGS_AFTER_RVAL				      \
	sst.w	r12, PTO+PT_GPR(12)[ep];				      \
	sst.w	r13, PTO+PT_GPR(13)[ep];				      \
	sst.w	r14, PTO+PT_GPR(14)[ep];				      \
	sst.w	r15, PTO+PT_GPR(15)[ep];				      \
	sst.w	r16, PTO+PT_GPR(16)[ep];				      \
	sst.w	r17, PTO+PT_GPR(17)[ep];				      \
	sst.w	r18, PTO+PT_GPR(18)[ep];				      \
	sst.w	r19, PTO+PT_GPR(19)[ep]
#define RESTORE_CALL_CLOBBERED_REGS_BEFORE_ARGS				      \
	sld.w	PTO+PT_GPR(1)[ep], r1;					      \
	sld.w	PTO+PT_GPR(5)[ep], r5
#define RESTORE_CALL_CLOBBERED_REGS_AFTER_RVAL				      \
	sld.w	PTO+PT_GPR(12)[ep], r12;				      \
	sld.w	PTO+PT_GPR(13)[ep], r13;				      \
	sld.w	PTO+PT_GPR(14)[ep], r14;				      \
	sld.w	PTO+PT_GPR(15)[ep], r15;				      \
	sld.w	PTO+PT_GPR(16)[ep], r16;				      \
	sld.w	PTO+PT_GPR(17)[ep], r17;				      \
	sld.w	PTO+PT_GPR(18)[ep], r18;				      \
	sld.w	PTO+PT_GPR(19)[ep], r19

/* Save `call clobbered' registers to the state-save-frame pointed to by EP.  */
#define SAVE_CALL_CLOBBERED_REGS					      \
	SAVE_CALL_CLOBBERED_REGS_BEFORE_ARGS;				      \
	SAVE_ARG_REGS;							      \
	SAVE_RVAL_REGS;							      \
	SAVE_CALL_CLOBBERED_REGS_AFTER_RVAL
/* Restore `call clobbered' registers from the state-save-frame pointed to
   by EP.  */
#define RESTORE_CALL_CLOBBERED_REGS					      \
	RESTORE_CALL_CLOBBERED_REGS_BEFORE_ARGS;			      \
	RESTORE_ARG_REGS;						      \
	RESTORE_RVAL_REGS;						      \
	RESTORE_CALL_CLOBBERED_REGS_AFTER_RVAL

/* Save `call clobbered' registers except for the return-value registers
   to the state-save-frame pointed to by EP.  */
#define SAVE_CALL_CLOBBERED_REGS_NO_RVAL				      \
	SAVE_CALL_CLOBBERED_REGS_BEFORE_ARGS;				      \
	SAVE_ARG_REGS;							      \
	SAVE_CALL_CLOBBERED_REGS_AFTER_RVAL
/* Restore `call clobbered' registers except for the return-value registers
   from the state-save-frame pointed to by EP.  */
#define RESTORE_CALL_CLOBBERED_REGS_NO_RVAL				      \
	RESTORE_CALL_CLOBBERED_REGS_BEFORE_ARGS;			      \
	RESTORE_ARG_REGS;						      \
	RESTORE_CALL_CLOBBERED_REGS_AFTER_RVAL

/* Save `call saved' registers to the state-save-frame pointed to by EP.  */
#define SAVE_CALL_SAVED_REGS						      \
	sst.w	r2, PTO+PT_GPR(2)[ep];					      \
	sst.w	r20, PTO+PT_GPR(20)[ep];				      \
	sst.w	r21, PTO+PT_GPR(21)[ep];				      \
	sst.w	r22, PTO+PT_GPR(22)[ep];				      \
	sst.w	r23, PTO+PT_GPR(23)[ep];				      \
	sst.w	r24, PTO+PT_GPR(24)[ep];				      \
	sst.w	r25, PTO+PT_GPR(25)[ep];				      \
	sst.w	r26, PTO+PT_GPR(26)[ep];				      \
	sst.w	r27, PTO+PT_GPR(27)[ep];				      \
	sst.w	r28, PTO+PT_GPR(28)[ep];				      \
	sst.w	r29, PTO+PT_GPR(29)[ep]
/* Restore `call saved' registers from the state-save-frame pointed to by EP.  */
#define RESTORE_CALL_SAVED_REGS						      \
	sld.w	PTO+PT_GPR(2)[ep], r2;					      \
	sld.w	PTO+PT_GPR(20)[ep], r20;				      \
	sld.w	PTO+PT_GPR(21)[ep], r21;				      \
	sld.w	PTO+PT_GPR(22)[ep], r22;				      \
	sld.w	PTO+PT_GPR(23)[ep], r23;				      \
	sld.w	PTO+PT_GPR(24)[ep], r24;				      \
	sld.w	PTO+PT_GPR(25)[ep], r25;				      \
	sld.w	PTO+PT_GPR(26)[ep], r26;				      \
	sld.w	PTO+PT_GPR(27)[ep], r27;				      \
	sld.w	PTO+PT_GPR(28)[ep], r28;				      \
	sld.w	PTO+PT_GPR(29)[ep], r29


/* Save the PC stored in the special register SAVEREG to the state-save-frame
   pointed to by EP.  r19 is clobbered.  */
#define SAVE_PC(savereg)						      \
	stsr	SR_ ## savereg, r19;					      \
	sst.w	r19, PTO+PT_PC[ep]
/* Restore the PC from the state-save-frame pointed to by EP, to the special
   register SAVEREG.  LP is clobbered (it is used as a scratch register
   because the POP_STATE macro restores it, and this macro is usually used
   inside POP_STATE).  */
#define RESTORE_PC(savereg)						      \
	sld.w	PTO+PT_PC[ep], lp;					      \
	ldsr	lp, SR_ ## savereg
/* Save the PSW register stored in the special register SAVREG to the
   state-save-frame pointed to by EP.  r19 is clobbered.  */
#define SAVE_PSW(savereg)						      \
	stsr	SR_ ## savereg, r19;					      \
	sst.w	r19, PTO+PT_PSW[ep]
/* Restore the PSW register from the state-save-frame pointed to by EP, to
   the special register SAVEREG.  LP is clobbered (it is used as a scratch
   register because the POP_STATE macro restores it, and this macro is
   usually used inside POP_STATE).  */
#define RESTORE_PSW(savereg)						      \
	sld.w	PTO+PT_PSW[ep], lp;					      \
	ldsr	lp, SR_ ## savereg

/* Save CTPC/CTPSW/CTBP registers to the state-save-frame pointed to by REG.
   r19 is clobbered.  */
#define SAVE_CT_REGS							      \
	stsr	SR_CTPC, r19;						      \
	sst.w	r19, PTO+PT_CTPC[ep];					      \
	stsr	SR_CTPSW, r19;						      \
	sst.w	r19, PTO+PT_CTPSW[ep];					      \
	stsr	SR_CTBP, r19;						      \
	sst.w	r19, PTO+PT_CTBP[ep]
/* Restore CTPC/CTPSW/CTBP registers from the state-save-frame pointed to by EP.
   LP is clobbered (it is used as a scratch register because the POP_STATE
   macro restores it, and this macro is usually used inside POP_STATE).  */
#define RESTORE_CT_REGS							      \
	sld.w	PTO+PT_CTPC[ep], lp;					      \
	ldsr	lp, SR_CTPC;						      \
	sld.w	PTO+PT_CTPSW[ep], lp;					      \
	ldsr	lp, SR_CTPSW;						      \
	sld.w	PTO+PT_CTBP[ep], lp;					      \
	ldsr	lp, SR_CTBP


/* Push register state, except for the stack pointer, on the stack in the
   form of a state-save-frame (plus some extra padding), in preparation for
   a system call.  This macro makes sure that the EP, GP, and LP
   registers are saved, and TYPE identifies the set of extra registers to
   be saved as well.  Also copies (the new value of) SP to EP.  */
#define PUSH_STATE(type)						      \
	addi	-STATE_SAVE_SIZE, sp, sp; /* Make room on the stack.  */      \
	st.w	ep, PTO+PT_GPR(GPR_EP)[sp];				      \
	mov	sp, ep;							      \
	sst.w	gp, PTO+PT_GPR(GPR_GP)[ep];				      \
	sst.w	lp, PTO+PT_GPR(GPR_LP)[ep];				      \
	type ## _STATE_SAVER
/* Pop a register state pushed by PUSH_STATE, except for the stack pointer,
   from the the stack.  */
#define POP_STATE(type)							      \
	mov	sp, ep;							      \
	type ## _STATE_RESTORER;					      \
	sld.w	PTO+PT_GPR(GPR_GP)[ep], gp;				      \
	sld.w	PTO+PT_GPR(GPR_LP)[ep], lp;				      \
	sld.w	PTO+PT_GPR(GPR_EP)[ep], ep;				      \
	addi	STATE_SAVE_SIZE, sp, sp /* Clean up our stack space.  */


/* Switch to the kernel stack if necessary, and push register state on the
   stack in the form of a state-save-frame.  Also load the current task
   pointer if switching from user mode.  The stack-pointer (r3) should have
   already been saved to the memory location SP_SAVE_LOC (the reason for
   this is that the interrupt vectors may be beyond a 22-bit signed offset
   jump from the actual interrupt handler, and this allows them to save the
   stack-pointer and use that register to do an indirect jump).  This macro
   makes sure that `special' registers, system registers, and the stack
   pointer are saved; TYPE identifies the set of extra registers to be
   saved as well.  SYSCALL_NUM is the register in which the system-call
   number this state is for is stored (r0 if this isn't a system call).
   Interrupts should already be disabled when calling this.  */
#define SAVE_STATE(type, syscall_num, sp_save_loc)			      \
	tst1	0, KM;			/* See if already in kernel mode.  */ \
	bz	1f;							      \
	ld.w	sp_save_loc, sp;	/* ... yes, use saved SP.  */	      \
	br	2f;							      \
1:	ld.w	KSP, sp;		/* ... no, switch to kernel stack. */ \
2:	PUSH_STATE(type);						      \
	ld.b	KM, r19;		/* Remember old kernel-mode.  */      \
	sst.w	r19, PTO+PT_KERNEL_MODE[ep];				      \
	ld.w	sp_save_loc, r19;	/* Remember old SP.  */		      \
	sst.w	r19, PTO+PT_GPR(GPR_SP)[ep];				      \
	mov	1, r19;			/* Now definitely in kernel-mode. */  \
	st.b	r19, KM;						      \
	GET_CURRENT_TASK(CURRENT_TASK);	/* Fetch the current task pointer. */ \
	/* Save away the syscall number.  */				      \
	sst.w	syscall_num, PTO+PT_CUR_SYSCALL[ep]


/* Save register state not normally saved by PUSH_STATE for TYPE, to the
   state-save-frame on the stack; also copies SP to EP.  r19 may be trashed. */
#define SAVE_EXTRA_STATE(type)						      \
	mov	sp, ep;							      \
	type ## _EXTRA_STATE_SAVER
/* Restore register state not normally restored by POP_STATE for TYPE,
   from the state-save-frame on the stack; also copies SP to EP.
   r19 may be trashed.  */
#define RESTORE_EXTRA_STATE(type)					      \
	mov	sp, ep;							      \
	type ## _EXTRA_STATE_RESTORER

/* Save any call-clobbered registers not normally saved by PUSH_STATE for
   TYPE, to the state-save-frame on the stack.
   EP may be trashed, but is not guaranteed to contain a copy of SP
   (unlike after most SAVE_... macros).  r19 may be trashed.  */
#define SAVE_EXTRA_STATE_FOR_SCHEDULE(type)				      \
	type ## _SCHEDULE_EXTRA_STATE_SAVER
/* Restore any call-clobbered registers not normally restored by
   POP_STATE for TYPE, to the state-save-frame on the stack.
   EP may be trashed, but is not guaranteed to contain a copy of SP
   (unlike after most RESTORE_... macros).  r19 may be trashed.  */
#define RESTORE_EXTRA_STATE_FOR_SCHEDULE(type)				      \
	type ## _SCHEDULE_EXTRA_STATE_RESTORER


/* These are extra_state_saver/restorer values for a user trap.  Note
   that we save the argument registers so that restarted syscalls will
   function properly (otherwise it wouldn't be necessary), and we must
   _not_ restore the return-value registers (so that traps can return a
   value!), but call-clobbered registers are not saved at all, as the
   caller of the syscall function should have saved them.  */

#define TRAP_RET reti
/* Traps don't save call-clobbered registers (but do still save arg regs).
   We preserve PSw to keep long-term state, namely interrupt status (for traps
   from kernel-mode), and the single-step flag (for user traps).  */
#define TRAP_STATE_SAVER						      \
	SAVE_ARG_REGS;							      \
	SAVE_PC(EIPC);							      \
	SAVE_PSW(EIPSW)
/* When traps return, they just leave call-clobbered registers (except for arg
   regs) with whatever value they have from the kernel.  Traps don't preserve
   the PSW, but we zero EIPSW to ensure it doesn't contain anything dangerous
   (in particular, the single-step flag).  */
#define TRAP_STATE_RESTORER						      \
	RESTORE_ARG_REGS;						      \
	RESTORE_PC(EIPC);						      \
	RESTORE_PSW(EIPSW)
/* Save registers not normally saved by traps.  We need to save r12, even
   though it's nominally call-clobbered, because it's used when restarting
   a system call (the signal-handling path uses SAVE_EXTRA_STATE, and
   expects r12 to be restored when the trap returns).  */
#define TRAP_EXTRA_STATE_SAVER						      \
	SAVE_RVAL_REGS;							      \
	sst.w	r12, PTO+PT_GPR(12)[ep];				      \
	SAVE_CALL_SAVED_REGS;						      \
	SAVE_CT_REGS
#define TRAP_EXTRA_STATE_RESTORER					      \
	RESTORE_RVAL_REGS;						      \
	sld.w	PTO+PT_GPR(12)[ep], r12;				      \
	RESTORE_CALL_SAVED_REGS;					      \
	RESTORE_CT_REGS
/* Save registers prior to calling scheduler (just before trap returns).
   We have to save the return-value registers to preserve the trap's return
   value.  Note that ..._SCHEDULE_EXTRA_STATE_SAVER, unlike most ..._SAVER
   macros, is required to setup EP itself if EP is needed (this is because
   in many cases, the macro is empty).  */
#define TRAP_SCHEDULE_EXTRA_STATE_SAVER					      \
	mov sp, ep;							      \
	SAVE_RVAL_REGS
/* Note that ..._SCHEDULE_EXTRA_STATE_RESTORER, unlike most ..._RESTORER
   macros, is required to setup EP itself if EP is needed (this is because
   in many cases, the macro is empty).  */
#define TRAP_SCHEDULE_EXTRA_STATE_RESTORER				      \
	mov sp, ep;							      \
	RESTORE_RVAL_REGS

/* Register saving/restoring for maskable interrupts.  */
#define IRQ_RET reti
#define IRQ_STATE_SAVER							      \
	SAVE_CALL_CLOBBERED_REGS;					      \
	SAVE_PC(EIPC);							      \
	SAVE_PSW(EIPSW)
#define IRQ_STATE_RESTORER						      \
	RESTORE_CALL_CLOBBERED_REGS;					      \
	RESTORE_PC(EIPC);						      \
	RESTORE_PSW(EIPSW)
#define IRQ_EXTRA_STATE_SAVER						      \
	SAVE_CALL_SAVED_REGS;						      \
	SAVE_CT_REGS
#define IRQ_EXTRA_STATE_RESTORER					      \
	RESTORE_CALL_SAVED_REGS;					      \
	RESTORE_CT_REGS
#define IRQ_SCHEDULE_EXTRA_STATE_SAVER	     /* nothing */
#define IRQ_SCHEDULE_EXTRA_STATE_RESTORER    /* nothing */

/* Register saving/restoring for non-maskable interrupts.  */
#define NMI_RET reti
#define NMI_STATE_SAVER							      \
	SAVE_CALL_CLOBBERED_REGS;					      \
	SAVE_PC(FEPC);							      \
	SAVE_PSW(FEPSW);
#define NMI_STATE_RESTORER						      \
	RESTORE_CALL_CLOBBERED_REGS;					      \
	RESTORE_PC(FEPC);						      \
	RESTORE_PSW(FEPSW);
#define NMI_EXTRA_STATE_SAVER						      \
	SAVE_CALL_SAVED_REGS;						      \
	SAVE_CT_REGS
#define NMI_EXTRA_STATE_RESTORER					      \
	RESTORE_CALL_SAVED_REGS;					      \
	RESTORE_CT_REGS
#define NMI_SCHEDULE_EXTRA_STATE_SAVER	     /* nothing */
#define NMI_SCHEDULE_EXTRA_STATE_RESTORER    /* nothing */

/* Register saving/restoring for debug traps.  */
#define DBTRAP_RET .long 0x014607E0 /* `dbret', but gas doesn't support it. */
#define DBTRAP_STATE_SAVER						      \
	SAVE_CALL_CLOBBERED_REGS;					      \
	SAVE_PC(DBPC);							      \
	SAVE_PSW(DBPSW)
#define DBTRAP_STATE_RESTORER						      \
	RESTORE_CALL_CLOBBERED_REGS;					      \
	RESTORE_PC(DBPC);						      \
	RESTORE_PSW(DBPSW)
#define DBTRAP_EXTRA_STATE_SAVER					      \
	SAVE_CALL_SAVED_REGS;						      \
	SAVE_CT_REGS
#define DBTRAP_EXTRA_STATE_RESTORER					      \
	RESTORE_CALL_SAVED_REGS;					      \
	RESTORE_CT_REGS
#define DBTRAP_SCHEDULE_EXTRA_STATE_SAVER	/* nothing */
#define DBTRAP_SCHEDULE_EXTRA_STATE_RESTORER	/* nothing */

/* Register saving/restoring for a context switch.  We don't need to save
   too many registers, because context-switching looks like a function call
   (via the function `switch_thread'), so callers will save any
   call-clobbered registers themselves.  We do need to save the CT regs, as
   they're normally not saved during kernel entry (the kernel doesn't use
   them).  We save PSW so that interrupt-status state will correctly follow
   each thread (mostly NMI vs. normal-IRQ/trap), though for the most part
   it doesn't matter since threads are always in almost exactly the same
   processor state during a context switch.  The stack pointer and return
   value are handled by switch_thread itself.  */
#define SWITCH_STATE_SAVER						      \
	SAVE_CALL_SAVED_REGS;						      \
	SAVE_PSW(PSW);							      \
	SAVE_CT_REGS
#define SWITCH_STATE_RESTORER						      \
	RESTORE_CALL_SAVED_REGS;					      \
	RESTORE_PSW(PSW);						      \
	RESTORE_CT_REGS


/* Restore register state from the state-save-frame on the stack, switch back
   to the user stack if necessary, and return from the trap/interrupt.
   EXTRA_STATE_RESTORER is a sequence of assembly language statements to
   restore anything not restored by this macro.  Only registers not saved by
   the C compiler are restored (that is, R3(sp), R4(gp), R31(lp), and
   anything restored by EXTRA_STATE_RESTORER).  */
#define RETURN(type)							      \
	ld.b	PTO+PT_KERNEL_MODE[sp], r19;				      \
	di;				/* Disable interrupts */	      \
	cmp	r19, r0;		/* See if returning to kernel mode, */\
	bne	2f;			/* ... if so, skip resched &c.  */    \
									      \
	/* We're returning to user mode, so check for various conditions that \
	   trigger rescheduling. */					      \
	GET_CURRENT_THREAD(r18);					      \
	ld.w	TI_FLAGS[r18], r19;					      \
	andi	_TIF_NEED_RESCHED, r19, r0;				      \
	bnz	3f;			/* Call the scheduler.  */	      \
5:	andi	_TIF_SIGPENDING, r19, r18;				      \
	ld.w	TASK_PTRACE[CURRENT_TASK], r19; /* ptrace flags */	      \
	or	r18, r19;		/* see if either is non-zero */	      \
	bnz	4f;			/* if so, handle them */	      \
									      \
/* Return to user state.  */						      \
1:	st.b	r0, KM;			/* Now officially in user state. */   \
									      \
/* Final return.  The stack-pointer fiddling is not needed when returning     \
   to kernel-mode, but they don't hurt, and this way we can share the	      \
   (sometimes rather lengthy) POP_STATE macro.  */			      \
2:	POP_STATE(type);						      \
	st.w	sp, KSP;		/* Save the kernel stack pointer. */  \
	ld.w	PT_GPR(GPR_SP)-PT_SIZE[sp], sp; /* Restore stack pointer. */  \
	type ## _RET;			/* Return from the trap/interrupt. */ \
									      \
/* Call the scheduler before returning from a syscall/trap. */		      \
3:	SAVE_EXTRA_STATE_FOR_SCHEDULE(type); /* Prepare to call scheduler. */ \
	jarl	call_scheduler, lp;	/* Call scheduler */		      \
	di;				/* The scheduler enables interrupts */\
	RESTORE_EXTRA_STATE_FOR_SCHEDULE(type);				      \
	GET_CURRENT_THREAD(r18);					      \
	ld.w	TI_FLAGS[r18], r19;					      \
	br	5b;			/* Continue with return path. */      \
									      \
/* Handle a signal or ptraced process return.				      \
   r18 should be non-zero if there are pending signals.  */		      \
4:	/* Not all registers are saved by the normal trap/interrupt entry     \
	   points (for instance, call-saved registers (because the normal     \
	   C-compiler calling sequence in the kernel makes sure they're	      \
	   preserved), and call-clobbered registers in the case of	      \
	   traps), but signal handlers may want to examine or change the      \
	   complete register state.  Here we save anything not saved by	      \
	   the normal entry sequence, so that it may be safely restored	      \
	   (in a possibly modified form) after do_signal returns.  */	      \
	SAVE_EXTRA_STATE(type);		/* Save state not saved by entry. */  \
	jarl	handle_signal_or_ptrace_return, lp;			      \
	RESTORE_EXTRA_STATE(type);	/* Restore extra regs.  */	      \
	br	1b


/* Jump to the appropriate function for the system call number in r12
   (r12 is not preserved), or return an error if r12 is not valid.  The
   LP register should point to the location where the called function
   should return.  [note that MAKE_SYS_CALL uses label 1]  */
#define MAKE_SYS_CALL							      \
	/* Figure out which function to use for this system call.  */	      \
	shl	2, r12;							      \
	/* See if the system call number is valid.  */			      \
	addi	lo(CSYM(sys_call_table) - sys_call_table_end), r12, r0;	      \
	bnh	1f;							      \
	mov	hilo(CSYM(sys_call_table)), r19;			      \
	add	r19, r12;						      \
	ld.w	0[r12], r12;						      \
	/* Make the system call.  */					      \
	jmp	[r12];							      \
	/* The syscall number is invalid, return an error.  */		      \
1:	addi	-ENOSYS, r0, r10;					      \
	jmp	[lp]


	.text

/*
 * User trap.
 *
 * Trap 0 system calls are also handled here.
 *
 * The stack-pointer (r3) should have already been saved to the memory
 * location ENTRY_SP (the reason for this is that the interrupt vectors may be
 * beyond a 22-bit signed offset jump from the actual interrupt handler, and
 * this allows them to save the stack-pointer and use that register to do an
 * indirect jump).
 *
 * Syscall protocol:
 *   Syscall number in r12, args in r6-r9
 *   Return value in r10
 */
G_ENTRY(trap):
	SAVE_STATE (TRAP, r12, ENTRY_SP) // Save registers.
	stsr	SR_ECR, r19		// Find out which trap it was.
	ei				// Enable interrupts.
	mov	hilo(ret_from_trap), lp	// where the trap should return

	// The following two shifts (1) clear out extraneous NMI data in the
	// upper 16-bits, (2) convert the 0x40 - 0x5f range of trap ECR
	// numbers into the (0-31) << 2 range we want, (3) set the flags.
	shl	27, r19			// chop off all high bits
	shr	25, r19			// scale back down and then << 2
	bnz	2f			// See if not trap 0.

	// Trap 0 is a `short' system call, skip general trap table.
	MAKE_SYS_CALL			// Jump to the syscall function.

2:	// For other traps, use a table lookup.
	mov	hilo(CSYM(trap_table)), r18
	add	r19, r18
	ld.w	0[r18], r18
	jmp	[r18]			// Jump to the trap handler.
END(trap)

/* This is just like ret_from_trap, but first restores extra registers
   saved by some wrappers.  */
L_ENTRY(restore_extra_regs_and_ret_from_trap):
	RESTORE_EXTRA_STATE(TRAP)
	// fall through
END(restore_extra_regs_and_ret_from_trap)

/* Entry point used to return from a syscall/trap.  */
L_ENTRY(ret_from_trap):
	RETURN(TRAP)
END(ret_from_trap)


/* This the initial entry point for a new child thread, with an appropriate
   stack in place that makes it look the the child is in the middle of an
   syscall.  This function is actually `returned to' from switch_thread
   (copy_thread makes ret_from_fork the return address in each new thread's
   saved context).  */
C_ENTRY(ret_from_fork):
	mov	r10, r6			// switch_thread returns the prev task.
	jarl	CSYM(schedule_tail), lp	// ...which is schedule_tail's arg
	mov	r0, r10			// Child's fork call should return 0.
	br	ret_from_trap		// Do normal trap return.
C_END(ret_from_fork)


/*
 * Trap 1: `long' system calls
 * `Long' syscall protocol:
 *   Syscall number in r12, args in r6-r9, r13-r14
 *   Return value in r10
 */
L_ENTRY(syscall_long):
	// Push extra arguments on the stack.  Note that by default, the trap
	// handler reserves enough stack space for 6 arguments, so we don't
	// have to make any additional room.
	st.w	r13, 16[sp]		// arg 5
	st.w	r14, 20[sp]		// arg 6

	// Make sure r13 and r14 are preserved, in case we have to restart a
	// system call because of a signal (ep has already been set by caller).
	st.w	r13, PTO+PT_GPR(13)[sp]
	st.w	r14, PTO+PT_GPR(13)[sp]
	mov	hilo(ret_from_long_syscall), lp

	MAKE_SYS_CALL			// Jump to the syscall function.
END(syscall_long)

/* Entry point used to return from a long syscall.  Only needed to restore
   r13/r14 if the general trap mechanism doesnt' do so.  */
L_ENTRY(ret_from_long_syscall):
	ld.w	PTO+PT_GPR(13)[sp], r13 // Restore the extra registers
	ld.w	PTO+PT_GPR(13)[sp], r14
	br	ret_from_trap		// The rest is the same as other traps
END(ret_from_long_syscall)


/* These syscalls need access to the struct pt_regs on the stack, so we
   implement them in assembly (they're basically all wrappers anyway).  */

L_ENTRY(sys_fork_wrapper):
#ifdef CONFIG_MMU
	addi	SIGCHLD, r0, r6		   // Arg 0: flags
	ld.w	PTO+PT_GPR(GPR_SP)[sp], r7 // Arg 1: child SP (use parent's)
	movea	PTO, sp, r8		   // Arg 2: parent context
	mov	r0, r9			   // Arg 3/4/5: 0
	st.w	r0, 16[sp]
	st.w	r0, 20[sp]
	mov	hilo(CSYM(do_fork)), r18   // Where the real work gets done
	br	save_extra_state_tramp	   // Save state and go there
#else
	// fork almost works, enough to trick you into looking elsewhere :-(
	addi	-EINVAL, r0, r10
	jmp	[lp]
#endif
END(sys_fork_wrapper)

L_ENTRY(sys_vfork_wrapper):
	addi	CLONE_VFORK | CLONE_VM | SIGCHLD, r0, r6 // Arg 0: flags
	ld.w	PTO+PT_GPR(GPR_SP)[sp], r7 // Arg 1: child SP (use parent's)
	movea	PTO, sp, r8		   // Arg 2: parent context
	mov	r0, r9			   // Arg 3/4/5: 0
	st.w	r0, 16[sp]
	st.w	r0, 20[sp]
	mov	hilo(CSYM(do_fork)), r18   // Where the real work gets done
	br	save_extra_state_tramp	   // Save state and go there
END(sys_vfork_wrapper)

L_ENTRY(sys_clone_wrapper):
	ld.w	PTO+PT_GPR(GPR_SP)[sp], r19// parent's stack pointer
	cmp	r7, r0			   // See if child SP arg (arg 1) is 0.
	cmov	z, r19, r7, r7		   // ... and use the parent's if so.
	movea	PTO, sp, r8		   // Arg 2: parent context
	mov	r0, r9			   // Arg 3/4/5: 0
	st.w	r0, 16[sp]
	st.w	r0, 20[sp]
	mov	hilo(CSYM(do_fork)), r18   // Where the real work gets done
	br	save_extra_state_tramp	   // Save state and go there
END(sys_clone_wrapper)


L_ENTRY(sys_execve_wrapper):
	movea	PTO, sp, r9		// add user context as 4th arg
	jr	CSYM(sys_execve)	// Do real work (tail-call).
END(sys_execve_wrapper)


L_ENTRY(sys_sigsuspend_wrapper):
	movea	PTO, sp, r7		// add user context as 2nd arg
	mov	hilo(CSYM(sys_sigsuspend)), r18	// syscall function
	jarl	save_extra_state_tramp, lp	// Save state and do it
	br	restore_extra_regs_and_ret_from_trap
END(sys_sigsuspend_wrapper)
L_ENTRY(sys_rt_sigsuspend_wrapper):
	movea	PTO, sp, r8		// add user context as 3rd arg
	mov	hilo(CSYM(sys_rt_sigsuspend)), r18 // syscall function
	jarl	save_extra_state_tramp, lp	   // Save state and do it
	br	restore_extra_regs_and_ret_from_trap
END(sys_rt_sigsuspend_wrapper)

L_ENTRY(sys_sigreturn_wrapper):
	movea	PTO, sp, r6		// add user context as 1st arg
	mov	hilo(CSYM(sys_sigreturn)), r18	// syscall function
	jarl	save_extra_state_tramp, lp	// Save state and do it
	br	restore_extra_regs_and_ret_from_trap
END(sys_sigreturn_wrapper)
L_ENTRY(sys_rt_sigreturn_wrapper):
	movea	PTO, sp, r6		// add user context as 1st arg
	mov	hilo(CSYM(sys_rt_sigreturn)), r18// syscall function
	jarl	save_extra_state_tramp, lp	 // Save state and do it
	br	restore_extra_regs_and_ret_from_trap
END(sys_rt_sigreturn_wrapper)


/* Save any state not saved by SAVE_STATE(TRAP), and jump to r18.
   It's main purpose is to share the rather lengthy code sequence that
   SAVE_STATE expands into among the above wrapper functions.  */
L_ENTRY(save_extra_state_tramp):
	SAVE_EXTRA_STATE(TRAP)		// Save state not saved by entry.
	jmp	[r18]			// Do the work the caller wants
END(save_extra_state_tramp)


/*
 * Hardware maskable interrupts.
 *
 * The stack-pointer (r3) should have already been saved to the memory
 * location ENTRY_SP (the reason for this is that the interrupt vectors may be
 * beyond a 22-bit signed offset jump from the actual interrupt handler, and
 * this allows them to save the stack-pointer and use that register to do an
 * indirect jump).
 */
G_ENTRY(irq):
	SAVE_STATE (IRQ, r0, ENTRY_SP)	// Save registers.

	stsr	SR_ECR, r6		// Find out which interrupt it was.
	movea	PTO, sp, r7		// User regs are arg2

	// All v850 implementations I know about encode their interrupts as
	// multiples of 0x10, starting at 0x80 (after NMIs and software
	// interrupts).  Convert this number into a simple IRQ index for the
	// rest of the kernel.  We also clear the upper 16 bits, which hold
	// NMI info, and don't appear to be cleared when a NMI returns.
	shl	16, r6			// clear upper 16 bits
	shr	20, r6			// shift back, and remove lower nibble
	add	-8, r6			// remove bias for irqs

	// Call the high-level interrupt handling code.
	jarl	CSYM(handle_irq), lp

	RETURN(IRQ)
END(irq)


/*
 * Debug trap / illegal-instruction exception
 *
 * The stack-pointer (r3) should have already been saved to the memory
 * location ENTRY_SP (the reason for this is that the interrupt vectors may be
 * beyond a 22-bit signed offset jump from the actual interrupt handler, and
 * this allows them to save the stack-pointer and use that register to do an
 * indirect jump).
 */
G_ENTRY(dbtrap):
	SAVE_STATE (DBTRAP, r0, ENTRY_SP)// Save registers.

	/* First see if we came from kernel mode; if so, the dbtrap
	   instruction has a special meaning, to set the DIR (`debug
	   information register') register.  This is because the DIR register
	   can _only_ be manipulated/read while in `debug mode,' and debug
	   mode is only active while we're inside the dbtrap handler.  The
	   exact functionality is:  { DIR = (DIR | r6) & ~r7; return DIR; }. */
	ld.b	PTO+PT_KERNEL_MODE[sp], r19
	cmp	r19, r0
	bz	1f

	stsr	SR_DIR, r10
	or	r6, r10
	not	r7, r7
	and	r7, r10
	ldsr	r10, SR_DIR
	stsr	SR_DIR, r10		// Confirm the value we set
	st.w	r10, PTO+PT_GPR(10)[sp]	// return it
	br	3f

1:	ei				// Enable interrupts.

	/* The default signal type we raise.  */
	mov	SIGTRAP, r6

	/* See if it's a single-step trap.  */
	stsr	SR_DBPSW, r19
	andi	0x0800, r19, r19
	bnz	2f

	/* Look to see if the preceding instruction was is a dbtrap or not,
	   to decide which signal we should use.  */
	stsr	SR_DBPC, r19		// PC following trapping insn
	ld.hu	-2[r19], r19
	ori	0xf840, r0, r20		// DBTRAP insn
	cmp	r19, r20		// Was this trap caused by DBTRAP?
	cmov	ne, SIGILL, r6, r6	// Choose signal appropriately

	/* Raise the desired signal.  */
2:	mov	CURRENT_TASK, r7	// Arg 1: task
	jarl	CSYM(send_sig), lp	// tail call

3:	RETURN(DBTRAP)
END(dbtrap)


/*
 * Hardware non-maskable interrupts.
 *
 * The stack-pointer (r3) should have already been saved to the memory
 * location ENTRY_SP (the reason for this is that the interrupt vectors may be
 * beyond a 22-bit signed offset jump from the actual interrupt handler, and
 * this allows them to save the stack-pointer and use that register to do an
 * indirect jump).
 */
G_ENTRY(nmi):
	SAVE_STATE (NMI, r0, NMI_ENTRY_SP); /* Save registers.  */

	stsr	SR_ECR, r6;		/* Find out which nmi it was.  */
	shr	20, r6;			/* Extract NMI code in bits 20-24. */
	movea	PTO, sp, r7;		/* User regs are arg2.  */

	/* Non-maskable interrupts always lie right after maskable interrupts.
	   Call the generic IRQ handler, with two arguments, the IRQ number,
	   and a pointer to the user registers, to handle the specifics.
	   (we subtract one because the first NMI has code 1).  */
	addi	FIRST_NMI - 1, r6, r6
	jarl	CSYM(handle_irq), lp

	RETURN(NMI)
END(nmi)


/*
 * Trap with no handler
 */
L_ENTRY(bad_trap_wrapper):
	mov	r19, r6			// Arg 0: trap number
	movea	PTO, sp, r7		// Arg 1: user regs
	jr	CSYM(bad_trap)		// tail call handler
END(bad_trap_wrapper)


/*
 * Invoke the scheduler, called from the trap/irq kernel exit path.
 *
 * This basically just calls `schedule', but also arranges for extra
 * registers to be saved for ptrace'd processes, so ptrace can modify them.
 */
L_ENTRY(call_scheduler):
	ld.w	TASK_PTRACE[CURRENT_TASK], r19	// See if task is ptrace'd
	cmp	r19, r0
	bnz	1f			// ... yes, do special stuff
	jr	CSYM(schedule)		// ... no, just tail-call scheduler

	// Save extra regs for ptrace'd task.  We want to save anything
	// that would otherwise only be `implicitly' saved by the normal
	// compiler calling-convention.
1:	mov	sp, ep			// Setup EP for SAVE_CALL_SAVED_REGS
	SAVE_CALL_SAVED_REGS		// Save call-saved registers to stack
	mov	lp, r20			// Save LP in a callee-saved register

	jarl	CSYM(schedule), lp	// Call scheduler

	mov	r20, lp
	mov	sp, ep			// We can't rely on EP after return
	RESTORE_CALL_SAVED_REGS		// Restore (possibly modified) regs
	jmp	[lp]			// Return to the return path
END(call_scheduler)


/*
 * This is an out-of-line handler for two special cases during the kernel
 * trap/irq exit sequence:
 *
 *  (1) If r18 is non-zero then a signal needs to be handled, which is
 *	done, and then the caller returned to.
 *
 *  (2) If r18 is non-zero then we're returning to a ptraced process, which
 *	has several special cases -- single-stepping and trap tracing, both
 *	of which require using the `dbret' instruction to exit the kernel
 *	instead of the normal `reti' (this is because the CPU not correctly
 *	single-step after a reti).  In this case, of course, this handler
 *	never returns to the caller.
 *
 * In either case, all registers should have been saved to the current
 * state-save-frame on the stack, except for callee-saved registers.
 *
 * [These two different cases are combined merely to avoid bloating the
 * macro-inlined code, not because they really make much sense together!]
 */
L_ENTRY(handle_signal_or_ptrace_return):
	cmp	r18, r0			// See if handling a signal
	bz	1f			// ... nope, go do ptrace return

	// Handle a signal
	mov	lp, r20			// Save link-pointer
	mov	r10, r21		// Save return-values (for trap)
	mov	r11, r22

	movea	PTO, sp, r6		// Arg 1: struct pt_regs *regs
	mov	r0, r7			// Arg 2: sigset_t *oldset
	jarl	CSYM(do_signal), lp	// Handle the signal
	di				// sig handling enables interrupts

	mov	r20, lp			// Restore link-pointer
	mov	r21, r10		// Restore return-values (for trap)
	mov	r22, r11
	ld.w	TASK_PTRACE[CURRENT_TASK], r19  // check ptrace flags too
	cmp	r19, r0
	bnz	1f			// ... some set, so look more
2:	jmp	[lp]			// ... none set, so return normally

	// ptrace return
1:	ld.w	PTO+PT_PSW[sp], r19	// Look at user-processes's flags
	andi	0x0800, r19, r19	// See if single-step flag is set
	bz	2b			// ... nope, return normally

	// Return as if from a dbtrap insn
	st.b	r0, KM			// Now officially in user state.
	POP_STATE(DBTRAP)		// Restore regs
	st.w	sp, KSP			// Save the kernel stack pointer.
	ld.w	PT_GPR(GPR_SP)-PT_SIZE[sp], sp // Restore user stack pointer.
	DBTRAP_RET			// Return from the trap/interrupt.
END(handle_signal_or_ptrace_return)


/*
 * This is where we switch between two threads.  The arguments are:
 *   r6 -- pointer to the struct thread for the `current' process
 *   r7 -- pointer to the struct thread for the `new' process.
 * when this function returns, it will return to the new thread.
 */
C_ENTRY(switch_thread):
	// Return the previous task (r10 is not clobbered by restore below)
	mov	CURRENT_TASK, r10
	// First, push the current processor state on the stack
	PUSH_STATE(SWITCH)
	// Now save the location of the kernel stack pointer for this thread;
	// since we've pushed all other state on the stack, this is enough to
	// restore it all later.
	st.w	sp, THREAD_KSP[r6]
	// Now restore the stack pointer from the new process
	ld.w	THREAD_KSP[r7], sp
	// ... and restore all state from that
	POP_STATE(SWITCH)
	// Update the current task pointer
	GET_CURRENT_TASK(CURRENT_TASK)
	// Now return into the new thread
	jmp	[lp]
C_END(switch_thread)


	.data

	.align 4
C_DATA(trap_table):
	.long bad_trap_wrapper		// trap 0, doesn't use trap table.
	.long syscall_long		// trap 1, `long' syscall.
	.long bad_trap_wrapper
	.long bad_trap_wrapper
	.long bad_trap_wrapper
	.long bad_trap_wrapper
	.long bad_trap_wrapper
	.long bad_trap_wrapper
	.long bad_trap_wrapper
	.long bad_trap_wrapper
	.long bad_trap_wrapper
	.long bad_trap_wrapper
	.long bad_trap_wrapper
	.long bad_trap_wrapper
	.long bad_trap_wrapper
	.long bad_trap_wrapper
C_END(trap_table)


	.section .rodata

	.align 4
C_DATA(sys_call_table):
	.long CSYM(sys_restart_syscall)	// 0
	.long CSYM(sys_exit)
	.long sys_fork_wrapper
	.long CSYM(sys_read)
	.long CSYM(sys_write)
	.long CSYM(sys_open)		// 5
	.long CSYM(sys_close)
	.long CSYM(sys_waitpid)
	.long CSYM(sys_creat)
	.long CSYM(sys_link)
	.long CSYM(sys_unlink)		// 10
	.long sys_execve_wrapper
	.long CSYM(sys_chdir)
	.long CSYM(sys_time)
	.long CSYM(sys_mknod)
	.long CSYM(sys_chmod)		// 15
	.long CSYM(sys_chown)
	.long CSYM(sys_ni_syscall)	// was: break
	.long CSYM(sys_ni_syscall)	// was: oldstat (aka stat)
	.long CSYM(sys_lseek)
	.long CSYM(sys_getpid)		// 20
	.long CSYM(sys_mount)
	.long CSYM(sys_oldumount)
	.long CSYM(sys_setuid)
	.long CSYM(sys_getuid)
	.long CSYM(sys_stime)		// 25
	.long CSYM(sys_ptrace)
	.long CSYM(sys_alarm)
	.long CSYM(sys_ni_syscall)	// was: oldfstat (aka fstat)
	.long CSYM(sys_pause)
	.long CSYM(sys_utime)		// 30
	.long CSYM(sys_ni_syscall)	// was: stty
	.long CSYM(sys_ni_syscall)	// was: gtty
	.long CSYM(sys_access)
	.long CSYM(sys_nice)
	.long CSYM(sys_ni_syscall)	// 35, was: ftime
	.long CSYM(sys_sync)
	.long CSYM(sys_kill)
	.long CSYM(sys_rename)
	.long CSYM(sys_mkdir)
	.long CSYM(sys_rmdir)		// 40
	.long CSYM(sys_dup)
	.long CSYM(sys_pipe)
	.long CSYM(sys_times)
	.long CSYM(sys_ni_syscall)	// was: prof
	.long CSYM(sys_brk)		// 45
	.long CSYM(sys_setgid)
	.long CSYM(sys_getgid)
	.long CSYM(sys_signal)
	.long CSYM(sys_geteuid)
	.long CSYM(sys_getegid)		// 50
	.long CSYM(sys_acct)
	.long CSYM(sys_umount)		// recycled never used phys()
	.long CSYM(sys_ni_syscall)	// was: lock
	.long CSYM(sys_ioctl)
	.long CSYM(sys_fcntl)		// 55
	.long CSYM(sys_ni_syscall)	// was: mpx
	.long CSYM(sys_setpgid)
	.long CSYM(sys_ni_syscall)	// was: ulimit
	.long CSYM(sys_ni_syscall)
	.long CSYM(sys_umask)		// 60
	.long CSYM(sys_chroot)
	.long CSYM(sys_ustat)
	.long CSYM(sys_dup2)
	.long CSYM(sys_getppid)
	.long CSYM(sys_getpgrp)		// 65
	.long CSYM(sys_setsid)
	.long CSYM(sys_sigaction)
	.long CSYM(sys_sgetmask)
	.long CSYM(sys_ssetmask)
	.long CSYM(sys_setreuid)	// 70
	.long CSYM(sys_setregid)
	.long sys_sigsuspend_wrapper
	.long CSYM(sys_sigpending)
	.long CSYM(sys_sethostname)
	.long CSYM(sys_setrlimit)	// 75
	.long CSYM(sys_getrlimit)
	.long CSYM(sys_getrusage)
	.long CSYM(sys_gettimeofday)
	.long CSYM(sys_settimeofday)
	.long CSYM(sys_getgroups)	// 80
	.long CSYM(sys_setgroups)
	.long CSYM(sys_select)
	.long CSYM(sys_symlink)
	.long CSYM(sys_ni_syscall)	// was: oldlstat (aka lstat)
	.long CSYM(sys_readlink)	// 85
	.long CSYM(sys_uselib)
	.long CSYM(sys_swapon)
	.long CSYM(sys_reboot)
	.long CSYM(old_readdir)
	.long CSYM(sys_mmap)		// 90
	.long CSYM(sys_munmap)
	.long CSYM(sys_truncate)
	.long CSYM(sys_ftruncate)
	.long CSYM(sys_fchmod)
	.long CSYM(sys_fchown)		// 95
	.long CSYM(sys_getpriority)
	.long CSYM(sys_setpriority)
	.long CSYM(sys_ni_syscall)	// was: profil
	.long CSYM(sys_statfs)
	.long CSYM(sys_fstatfs)		// 100
	.long CSYM(sys_ni_syscall)	// i386: ioperm
	.long CSYM(sys_socketcall)
	.long CSYM(sys_syslog)
	.long CSYM(sys_setitimer)
	.long CSYM(sys_getitimer)	// 105
	.long CSYM(sys_newstat)
	.long CSYM(sys_newlstat)
	.long CSYM(sys_newfstat)
	.long CSYM(sys_ni_syscall)	// was: olduname (aka uname)
	.long CSYM(sys_ni_syscall)	// 110, i386: iopl
	.long CSYM(sys_vhangup)
	.long CSYM(sys_ni_syscall)	// was: idle
	.long CSYM(sys_ni_syscall)	// i386: vm86old
	.long CSYM(sys_wait4)
	.long CSYM(sys_swapoff)		// 115
	.long CSYM(sys_sysinfo)
	.long CSYM(sys_ipc)
	.long CSYM(sys_fsync)
	.long sys_sigreturn_wrapper
	.long sys_clone_wrapper		// 120
	.long CSYM(sys_setdomainname)
	.long CSYM(sys_newuname)
	.long CSYM(sys_ni_syscall)	// i386: modify_ldt, m68k: cacheflush
	.long CSYM(sys_adjtimex)
	.long CSYM(sys_ni_syscall)	// 125 - sys_mprotect
	.long CSYM(sys_sigprocmask)
	.long CSYM(sys_ni_syscall)	// sys_create_module
	.long CSYM(sys_init_module)
	.long CSYM(sys_delete_module)
	.long CSYM(sys_ni_syscall)	// 130 - sys_get_kernel_syms
	.long CSYM(sys_quotactl)
	.long CSYM(sys_getpgid)
	.long CSYM(sys_fchdir)
	.long CSYM(sys_bdflush)
	.long CSYM(sys_sysfs)		// 135
	.long CSYM(sys_personality)
	.long CSYM(sys_ni_syscall)	// for afs_syscall
	.long CSYM(sys_setfsuid)
	.long CSYM(sys_setfsgid)
	.long CSYM(sys_llseek)		// 140
	.long CSYM(sys_getdents)
	.long CSYM(sys_select)		// for backward compat; remove someday
	.long CSYM(sys_flock)
	.long CSYM(sys_ni_syscall)	// sys_msync
	.long CSYM(sys_readv)		// 145
	.long CSYM(sys_writev)
	.long CSYM(sys_getsid)
	.long CSYM(sys_fdatasync)
	.long CSYM(sys_sysctl)
	.long CSYM(sys_ni_syscall)	// 150 - sys_mlock
	.long CSYM(sys_ni_syscall)	// sys_munlock
	.long CSYM(sys_ni_syscall)	// sys_mlockall
	.long CSYM(sys_ni_syscall)	// sys_munlockall
	.long CSYM(sys_sched_setparam)
	.long CSYM(sys_sched_getparam)	// 155
	.long CSYM(sys_sched_setscheduler)
	.long CSYM(sys_sched_getscheduler)
	.long CSYM(sys_sched_yield)
	.long CSYM(sys_sched_get_priority_max)
	.long CSYM(sys_sched_get_priority_min)	// 160
	.long CSYM(sys_sched_rr_get_interval)
	.long CSYM(sys_nanosleep)
	.long CSYM(sys_ni_syscall)	// sys_mremap
	.long CSYM(sys_setresuid)
	.long CSYM(sys_getresuid)	// 165
	.long CSYM(sys_ni_syscall)	// for vm86
	.long CSYM(sys_ni_syscall)	// sys_query_module
	.long CSYM(sys_poll)
	.long CSYM(sys_nfsservctl)
	.long CSYM(sys_setresgid)	// 170
	.long CSYM(sys_getresgid)
	.long CSYM(sys_prctl)
	.long sys_rt_sigreturn_wrapper
	.long CSYM(sys_rt_sigaction)
	.long CSYM(sys_rt_sigprocmask)	// 175
	.long CSYM(sys_rt_sigpending)
	.long CSYM(sys_rt_sigtimedwait)
	.long CSYM(sys_rt_sigqueueinfo)
	.long sys_rt_sigsuspend_wrapper
	.long CSYM(sys_pread64)		// 180
	.long CSYM(sys_pwrite64)
	.long CSYM(sys_lchown)
	.long CSYM(sys_getcwd)
	.long CSYM(sys_capget)
	.long CSYM(sys_capset)		// 185
	.long CSYM(sys_sigaltstack)
	.long CSYM(sys_sendfile)
	.long CSYM(sys_ni_syscall)	// streams1
	.long CSYM(sys_ni_syscall)	// streams2
	.long sys_vfork_wrapper		// 190
	.long CSYM(sys_ni_syscall)
	.long CSYM(sys_mmap2)
	.long CSYM(sys_truncate64)
	.long CSYM(sys_ftruncate64)
	.long CSYM(sys_stat64)		// 195
	.long CSYM(sys_lstat64)
	.long CSYM(sys_fstat64)
	.long CSYM(sys_fcntl64)
	.long CSYM(sys_getdents64)
	.long CSYM(sys_pivot_root)	// 200
	.long CSYM(sys_gettid)
	.long CSYM(sys_tkill)
sys_call_table_end:
C_END(sys_call_table)