summaryrefslogtreecommitdiff
path: root/server.c
blob: 0b6d93d29ece00dd99684a15383b5f3244d481f5 (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
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
/*
 * Mach Operating System
 * Copyright (c) 1991,1990 Carnegie Mellon University
 * All Rights Reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */

#include <assert.h>

#include "write.h"
#include "utils.h"
#include "global.h"
#include "error.h"
#include "cpu.h"

static void
WriteIncludes(FILE *file)
{
    fprintf(file, "#ifndef _GNU_SOURCE\n");
    fprintf(file, "#define _GNU_SOURCE 1\n");
    fprintf(file, "#endif\n\n");

    fprintf(file, "#define EXPORT_BOOLEAN\n");
    fprintf(file, "#include <mach/boolean.h>\n");
    fprintf(file, "#include <mach/kern_return.h>\n");
    fprintf(file, "#include <mach/message.h>\n");
    fprintf(file, "#include <mach/mig_errors.h>\n");
    fprintf(file, "#include <mach/mig_support.h>\n");
    if (IsKernelServer)
	fprintf(file, "#include <ipc/ipc_port.h>\n");
    fprintf(file, "#include <stdint.h>\n");
    fprintf(file, "\n");
}

static void
WriteGlobalDecls(FILE *file)
{
    if (RCSId != strNULL)
	WriteRCSDecl(file, strconcat(SubsystemName, "_server"), RCSId);

    /* Used for locations in the request message, *not* reply message.
       Reply message locations aren't dependent on IsKernelServer. */

    if (IsKernelServer)
    {
	fprintf(file, "#define msgh_request_port\tmsgh_remote_port\n");
	fprintf(file, "#define MACH_MSGH_BITS_REQUEST(bits)");
	fprintf(file, "\tMACH_MSGH_BITS_REMOTE(bits)\n");
	fprintf(file, "#define msgh_reply_port\t\tmsgh_local_port\n");
	fprintf(file, "#define MACH_MSGH_BITS_REPLY(bits)");
	fprintf(file, "\tMACH_MSGH_BITS_LOCAL(bits)\n");
    }
    else
    {
	fprintf(file, "#define msgh_request_port\tmsgh_local_port\n");
	fprintf(file, "#define MACH_MSGH_BITS_REQUEST(bits)");
	fprintf(file, "\tMACH_MSGH_BITS_LOCAL(bits)\n");
	fprintf(file, "#define msgh_reply_port\t\tmsgh_remote_port\n");
	fprintf(file, "#define MACH_MSGH_BITS_REPLY(bits)");
	fprintf(file, "\tMACH_MSGH_BITS_REMOTE(bits)\n");
    }
    fprintf(file, "\n");
}

static void
WriteProlog(FILE *file)
{
    fprintf(file, "/* Module %s */\n", SubsystemName);
    fprintf(file, "\n");

    WriteIncludes(file);
    WriteBogusDefines(file);
    WriteGlobalDecls(file);
}


static void
WriteSymTabEntries(FILE *file, const statement_t *stats)
{
    const statement_t *stat;
    u_int current = 0;

    for (stat = stats; stat != stNULL; stat = stat->stNext)
	if (stat->stKind == skRoutine) {
	    u_int num = stat->stRoutine->rtNumber;
	    const char	*name = stat->stRoutine->rtName;

	    while (++current <= num)
		fprintf(file,"\t\t\t{ \"\", 0, 0 },\n");
	    fprintf(file, "\t{ \"%s\", %d, _X%s },\n",
	    	name,
		SubsystemBase + current - 1,
		name);
	}
    while (++current <= rtNumber)
	fprintf(file,"\t{ \"\", 0, 0 },\n");
}

static void
WriteArrayEntries(FILE *file, const statement_t *stats)
{
    u_int current = 0;
    const statement_t *stat;

    for (stat = stats; stat != stNULL; stat = stat->stNext)
	if (stat->stKind == skRoutine)
	{
	    const routine_t *rt = stat->stRoutine;

	    while (current++ < rt->rtNumber)
		fprintf(file, "\t\t0,\n");
	    fprintf(file, "\t\t_X%s,\n", rt->rtName);
	}
    while (current++ < rtNumber)
	fprintf(file, "\t\t\t0,\n");
}

void
WriteSubsystemServerRoutine(FILE *file, const char *typeModifier)
{
    fprintf(file, "%s mig_routine_t %s_routine\n", typeModifier,
	    ServerDemux);
    fprintf(file, "\t(const mach_msg_header_t *InHeadP)\n");

    fprintf(file, "{\n");
    fprintf(file, "\tint msgh_id;\n");
    fprintf(file, "\n");
    fprintf(file, "\tmsgh_id = InHeadP->msgh_id - %d;\n", SubsystemBase);
    fprintf(file, "\n");
    fprintf(file, "\tif ((msgh_id > %d) || (msgh_id < 0))\n",
	    rtNumber - 1);
    fprintf(file, "\t\treturn 0;\n");
    fprintf(file, "\n");
    fprintf(file, "\treturn %s_routines[msgh_id];\n", ServerDemux);
    fprintf(file, "}\n");
}

static void
WriteEpilog(FILE *file, const statement_t *stats)
{
    fprintf(file, "\n");

    /*
     * First, the symbol table
     */
     fprintf(file, "mig_routine_t %s_routines[] = {\n", ServerDemux);

     WriteArrayEntries(file, stats);

     fprintf(file, "};\n");
     fprintf(file, "\n");

     /*
      * Then, the server routine
      */
    fprintf(file, "mig_external boolean_t %s\n", ServerDemux);
    fprintf(file, "\t(mach_msg_header_t *InHeadP, mach_msg_header_t *OutHeadP)\n");

    fprintf(file, "{\n");
    fprintf(file, "\tmach_msg_header_t *InP =  InHeadP;\n");

    fprintf(file, "\tmig_reply_header_t *OutP = (mig_reply_header_t *) OutHeadP;\n");

    fprintf(file, "\n");

    WriteStaticDecl(file, itRetCodeType,
		    itRetCodeType->itDeallocate, itRetCodeType->itLongForm,
		    /*is_server=*/ TRUE, !IsKernelServer, "RetCodeType");
    fprintf(file, "\n");

    fprintf(file, "\tmig_routine_t routine;\n");
    fprintf(file, "\n");

    fprintf(file, "\tOutP->Head.msgh_bits = ");
    fprintf(file, "MACH_MSGH_BITS(MACH_MSGH_BITS_REPLY(InP->msgh_bits), 0);\n");
    fprintf(file, "\tOutP->Head.msgh_size = sizeof *OutP;\n");
    fprintf(file, "\tOutP->Head.msgh_remote_port = InP->msgh_reply_port;\n");
    fprintf(file, "\tOutP->Head.msgh_local_port = MACH_PORT_NULL;\n");
    fprintf(file, "\tOutP->Head.msgh_seqno = 0;\n");
    fprintf(file, "\tOutP->Head.msgh_id = InP->msgh_id + 100;\n");
    fprintf(file, "\n");
    WritePackMsgType(file, itRetCodeType,
		     itRetCodeType->itDeallocate, itRetCodeType->itLongForm,
		     !IsKernelServer, "OutP->RetCodeType", "RetCodeType");
    fprintf(file, "\n");

    fprintf(file, "\tif ((InP->msgh_id > %d) || (InP->msgh_id < %d) ||\n",
	    SubsystemBase + rtNumber - 1, SubsystemBase);
    fprintf(file, "\t    ((routine = %s_routines[InP->msgh_id - %d]) == 0)) {\n",
	    ServerDemux, SubsystemBase);
    fprintf(file, "\t\tOutP->RetCode = MIG_BAD_ID;\n");
    fprintf(file, "\t\treturn FALSE;\n");
    fprintf(file, "\t}\n");

    /* Call appropriate routine */
    fprintf(file, "\t(*routine) (InP, &OutP->Head);\n");
    fprintf(file, "\treturn TRUE;\n");
    fprintf(file, "}\n");
    fprintf(file, "\n");

    /* symtab */

    if (GenSymTab) {
	fprintf(file,"\nmig_symtab_t _%sSymTab[] = {\n",SubsystemName);
	WriteSymTabEntries(file,stats);
	fprintf(file,"};\n");
	fprintf(file,"int _%sSymTabBase = %d;\n",SubsystemName,SubsystemBase);
	fprintf(file,"int _%sSymTabEnd = %d;\n",SubsystemName,SubsystemBase+rtNumber);
    }
}

/*
 *  Returns the return type of the server-side work function.
 *  Suitable for "extern %s serverfunc()".
 */
static const char *
ServerSideType(const routine_t *rt)
{
    if (rt->rtServerReturn == argNULL)
	return "void";
    else
	return rt->rtServerReturn->argType->itTransType;
}

static void
WriteLocalVarDecl(FILE *file, const argument_t *arg)
{
    const ipc_type_t *it = arg->argType;

    if (it->itInLine && it->itVarArray)
    {
	const ipc_type_t *btype = it->itElement;

	fprintf(file, "\t%s %s[%d]", btype->itTransType,
		arg->argVarName, it->itNumber/btype->itNumber);
    }
    else
	fprintf(file, "\t%s %s", it->itTransType, arg->argVarName);
}

static void
WriteLocalPtrDecl(FILE *file, const argument_t *arg)
{
    fprintf(file, "\t%s *%sP",
		FetchServerType(arg->argType->itElement),
		arg->argVarName);
}

static void
WriteServerArgDecl(FILE *file, const argument_t *arg)
{
    const char *qualif = ServerVarQualifier(arg);
    fprintf(file, "%s%s %s%s",
	    qualif, arg->argType->itTransType,
	    arg->argByReferenceServer ? "*" : "",
	    arg->argVarName);
}

/*
 *  Writes the local variable declarations which are always
 *  present:  InP, OutP, the server-side work function.
 */
static void
WriteVarDecls(FILE *file, const routine_t *rt)
{
    int i;
    boolean_t NeedMsghSize = FALSE;
    boolean_t NeedMsghSizeDelta = FALSE;

    fprintf(file, "\tRequest *In0P = (Request *) InHeadP;\n");
    for (i = 1; i <= rt->rtMaxRequestPos; i++)
	fprintf(file, "\tRequest *In%dP;\n", i);
    fprintf(file, "\tReply *OutP = (Reply *) OutHeadP;\n");

    fprintf(file, "\tmig_external %s %s\n",
	    ServerSideType(rt), rt->rtServerName);
    fprintf(file, "\t\t(");
    WriteList(file, rt->rtArgs, WriteServerArgDecl, akbServerArg, ", ", "");
    fprintf(file, ");\n");
    fprintf(file, "\n");

    if (!rt->rtSimpleFixedReply)
	fprintf(file, "\tboolean_t msgh_simple = msgh_simple;\n");
    else if (!rt->rtSimpleCheckRequest)
    {
	fprintf(file, "#if\tTypeCheck\n");
	fprintf(file, "\tboolean_t msgh_simple = msgh_simple;\n");
	fprintf(file, "#endif\t/* TypeCheck */\n");
	fprintf(file, "\n");
    }

    /* if either request or reply is variable, we may need
       msgh_size_delta and msgh_size */

    if (rt->rtNumRequestVar > 0)
	NeedMsghSize = TRUE;
    if (rt->rtMaxRequestPos > 0)
	NeedMsghSizeDelta = TRUE;

    if (rt->rtNumReplyVar > 1)
	NeedMsghSize = TRUE;
    if (rt->rtMaxReplyPos > 0)
	NeedMsghSizeDelta = TRUE;

    if (NeedMsghSize)
	fprintf(file, "\tunsigned int msgh_size;\n");
    if (NeedMsghSizeDelta)
	fprintf(file, "\tunsigned int msgh_size_delta;\n");

    if (NeedMsghSize || NeedMsghSizeDelta)
	fprintf(file, "\n");
}

static void
WriteMsgError(FILE *file, const char *error_msg)
{
    fprintf(file, "\t\t{ OutP->RetCode = %s; return; }\n", error_msg);
}

static void
WriteReplyInit(FILE *file, const routine_t *rt)
{
    boolean_t printed_nl = FALSE;

    if (rt->rtSimpleFixedReply)
    {
	if (!rt->rtSimpleSendReply) /* complex reply message */
	{
	    printed_nl = TRUE;
	    fprintf(file, "\n");
	    fprintf(file,
		"\tOutP->Head.msgh_bits |= MACH_MSGH_BITS_COMPLEX;\n");
	}
    }
    else
    {
	printed_nl = TRUE;
	fprintf(file, "\n");
	fprintf(file, "\tmsgh_simple = %s;\n",
			  strbool(rt->rtSimpleSendReply));
    }

    if (rt->rtNumReplyVar == 0)
    {
	if (!printed_nl)
	    fprintf(file, "\n");
	fprintf(file, "\tOutP->Head.msgh_size = %d;\n", rt->rtReplySize);
    }
}

static void
WriteReplyHead(FILE *file, const routine_t *rt)
{
    if ((!rt->rtSimpleFixedReply) ||
	(rt->rtNumReplyVar > 1))
    {
	fprintf(file, "\n");
	if (rt->rtMaxReplyPos > 0)
	    fprintf(file, "\tOutP = (Reply *) OutHeadP;\n");
    }

    if (!rt->rtSimpleFixedReply)
    {
	fprintf(file, "\tif (!msgh_simple)\n");
	fprintf(file,
		"\t\tOutP->Head.msgh_bits |= MACH_MSGH_BITS_COMPLEX;\n");
    }
    if (rt->rtNumReplyVar > 1)
	fprintf(file, "\tOutP->Head.msgh_size = msgh_size;\n");
}

static void
WriteCheckHead(FILE *file, const routine_t *rt)
{
    fprintf(file, "#if\tTypeCheck\n");
    if (rt->rtNumRequestVar > 0)
	fprintf(file, "\tmsgh_size = In0P->Head.msgh_size;\n");
    if (!rt->rtSimpleCheckRequest)
	fprintf(file, "\tmsgh_simple = !(In0P->Head.msgh_bits & MACH_MSGH_BITS_COMPLEX);\n");

    if (rt->rtNumRequestVar > 0)
	fprintf(file, "\tif (mig_unlikely ((msgh_size < %d)",
		rt->rtRequestSize);
    else
	fprintf(file, "\tif (mig_unlikely ((In0P->Head.msgh_size != %d)",
		rt->rtRequestSize);

    if (rt->rtSimpleCheckRequest)
	fprintf(file, " ||\n\t    %s(In0P->Head.msgh_bits & MACH_MSGH_BITS_COMPLEX)",
		rt->rtSimpleReceiveRequest ? "" : "!");
    fprintf(file, "))\n");
    WriteMsgError(file, "MIG_BAD_ARGUMENTS");
    fprintf(file, "#endif\t/* TypeCheck */\n");
    fprintf(file, "\n");
}

static void
WriteTypeCheck(FILE *file, const argument_t *arg)
{
    const ipc_type_t *it = arg->argType;
    const routine_t *rt = arg->argRoutine;

    fprintf(file, "#if\tTypeCheck\n");
    if (akCheck(arg->argKind, akbRequestQC))
	fprintf(file, "\tif (BAD_TYPECHECK(&In%dP->%s, &%sCheck))\n",
		arg->argRequestPos, arg->argTTName, arg->argVarName);
    else
    {
	fprintf(file, "\tif (mig_unlikely (");
	if (!it->itIndefinite) {
	    fprintf(file, "(In%dP->%s%s.msgt_inline != %s) ||\n\t    ",
		arg->argRequestPos, arg->argTTName,
		arg->argLongForm ? ".msgtl_header" : "",
		strbool(it->itInLine));
	}
	fprintf(file, "(In%dP->%s%s.msgt_longform != %s) ||\n",
		arg->argRequestPos, arg->argTTName,
		arg->argLongForm ? ".msgtl_header" : "",
		strbool(arg->argLongForm));
	if (it->itOutName == MACH_MSG_TYPE_POLYMORPHIC)
	{
	    if (!rt->rtSimpleCheckRequest)
		fprintf(file, "\t    (MACH_MSG_TYPE_PORT_ANY(In%dP->%s.msgt%s_name) && msgh_simple) ||\n",
			arg->argRequestPos, arg->argTTName,
			arg->argLongForm ? "l" : "");
	}
	else
	    fprintf(file, "\t    (In%dP->%s.msgt%s_name != %s) ||\n",
		    arg->argRequestPos, arg->argTTName,
		    arg->argLongForm ? "l" : "",
		    it->itOutNameStr);
	if (!it->itVarArray)
	    fprintf(file, "\t    (In%dP->%s.msgt%s_number != %d) ||\n",
		    arg->argRequestPos, arg->argTTName,
		    arg->argLongForm ? "l" : "",
		    it->itNumber);
	fprintf(file, "\t    (In%dP->%s.msgt%s_size != %d)))\n",
		arg->argRequestPos, arg->argTTName,
		arg->argLongForm ? "l" : "",
		it->itSize);
    }
    WriteMsgError(file, "MIG_BAD_ARGUMENTS");
    fprintf(file, "#endif\t/* TypeCheck */\n");
    fprintf(file, "\n");
}

static void
WriteCheckArgSize(FILE *file, const argument_t *arg)
{
    const ipc_type_t *ptype = arg->argType;
    const ipc_type_t *btype = ptype->itElement;
    const argument_t *count = arg->argCount;
    int multiplier = btype->itTypeSize / btype->itNumber;

    if (ptype->itIndefinite) {
	/*
	 * Check descriptor.  If out-of-line, use standard size.
	 */
	fprintf(file, "(In%dP->%s%s.msgt_inline) ? ",
		arg->argRequestPos,
		arg->argTTName,
		arg->argLongForm ? ".msgtl_header" : "");
    }

    if (btype->itTypeSize % word_size != 0)
	fprintf(file, "(");

    if (multiplier > 1)
	fprintf(file, "%d * ", multiplier);

    fprintf(file, "In%dP->%s", arg->argRequestPos, count->argMsgField);

    /* If the base type size of the data field isn`t a multiple of word_size,
       we have to round up. */
    if (btype->itTypeSize % word_size != 0)
	fprintf(file, " + %d) & ~%d", word_size - 1, word_size - 1);

    if (ptype->itIndefinite) {
	fprintf(file, " : sizeof(%s *)", FetchServerType(btype));
    }
}

static void
WriteCheckMsgSize(FILE *file, const argument_t *arg)
{
    const routine_t *rt = arg->argRoutine;

    /* If there aren't any more In args after this, then
       we can use the msgh_size_delta value directly in
       the TypeCheck conditional. */

    if (arg->argRequestPos == rt->rtMaxRequestPos)
    {
	fprintf(file, "#if\tTypeCheck\n");
	fprintf(file, "\tif (mig_unlikely (msgh_size != %d + (",
		rt->rtRequestSize);
	WriteCheckArgSize(file, arg);
	fprintf(file, ")))\n");

	WriteMsgError(file, "MIG_BAD_ARGUMENTS");
	fprintf(file, "#endif\t/* TypeCheck */\n");
    }
    else
    {
	/* If there aren't any more variable-sized arguments after this,
	   then we must check for exact msg-size and we don't need to
	   update msgh_size. */

	boolean_t LastVarArg = arg->argRequestPos+1 == rt->rtNumRequestVar;

	/* calculate the actual size in bytes of the data field.  note
	   that this quantity must be a multiple of word_size.  hence, if
	   the base type size isn't a multiple of word_size, we have to
	   round up.  note also that btype->itNumber must
	   divide btype->itTypeSize (see itCalculateSizeInfo). */

	fprintf(file, "\tmsgh_size_delta = ");
	WriteCheckArgSize(file, arg);
	fprintf(file, ";\n");
	fprintf(file, "#if\tTypeCheck\n");

	/* Don't decrement msgh_size until we've checked that
	   it won't underflow. */

	if (LastVarArg)
	    fprintf(file,
		    "\tif (mig_unlikely (msgh_size != %d + msgh_size_delta))\n",
		rt->rtRequestSize);
	else
	    fprintf(file,
		    "\tif (mig_unlikely (msgh_size < %d + msgh_size_delta))\n",
		rt->rtRequestSize);
	WriteMsgError(file, "MIG_BAD_ARGUMENTS");

	if (!LastVarArg)
	    fprintf(file, "\tmsgh_size -= msgh_size_delta;\n");

	fprintf(file, "#endif\t/* TypeCheck */\n");
    }
    fprintf(file, "\n");
}

static const char *
InArgMsgField(const argument_t *arg)
{
    static char buffer[100];

    /*
     *	Inside the kernel, the request and reply port fields
     *	really hold ipc_port_t values, not mach_port_t values.
     *	Hence we must cast the values.
     */

    if (IsKernelServer &&
	((akIdent(arg->argKind) == akeRequestPort) ||
	 (akIdent(arg->argKind) == akeReplyPort)))
	sprintf(buffer, "(ipc_port_t) In%dP->%s",
		arg->argRequestPos, arg->argMsgField);
    else
	sprintf(buffer, "In%dP->%s",
		arg->argRequestPos, arg->argMsgField);

    return buffer;
}

static void
WriteExtractArgValue(FILE *file, const argument_t *arg)
{
    const ipc_type_t *it = arg->argType;
    boolean_t have_payload;

    if (arg->argMultiplier > 1)
	WriteCopyType(file, it, "%s", "/* %s */ %s / %d",
		      arg->argVarName, InArgMsgField(arg), arg->argMultiplier);
    else if ((have_payload = (it->itInTransPayload != strNULL &&
	       strcmp(arg->argMsgField, "Head.msgh_request_port") == 0)) ||
	     it->itInTrans != strNULL) {

	if (have_payload) {
	    argument_t argPayload = *arg;
	    argPayload.argMsgField = "Head.msgh_bits";
	    fprintf(file,
		    "\tif (MACH_MSGH_BITS_LOCAL (%s) == "
		    "MACH_MSG_TYPE_PROTECTED_PAYLOAD)\n"
		    "\t", InArgMsgField(&argPayload));

	    argPayload.argMsgField = "Head.msgh_protected_payload";
	    WriteCopyType(file, it, "%s", "/* %s */ %s(%s)",
			  arg->argVarName, it->itInTransPayload,
			  InArgMsgField(&argPayload));

	    fprintf(file,
		    "\telse\n"
		    "\t");

	    if (it->itInTrans == strNULL)
		fprintf(file, "\t%s = %s;",
			arg->argVarName, InArgMsgField(arg));
	    else
		WriteCopyType(file, it, "%s", "/* %s */ %s(%s)",
			      arg->argVarName, it->itInTrans,
			      InArgMsgField(arg));
	} else {
	    WriteCopyType(file, it, "%s", "/* %s */ %s(%s)",
			  arg->argVarName, it->itInTrans,
			  InArgMsgField(arg));
	}
    } else
	WriteCopyType(file, it, "%s", "/* %s */ %s",
		      arg->argVarName, InArgMsgField(arg));
    fprintf(file, "\n");
}

static void
WriteInitializeCount(FILE *file, const argument_t *arg)
{
    const ipc_type_t *ptype = arg->argParent->argType;
    const ipc_type_t *btype = ptype->itElement;

    /*
     *	Initialize 'count' argument for variable-length inline OUT parameter
     *	with maximum allowed number of elements.
     */

    fprintf(file, "\t%s = %d;\n", arg->argVarName,
	    ptype->itNumber/btype->itNumber);

    /*
     *	If the user passed in a count, then we use the minimum.
     *	We can't let the user completely override our maximum,
     *	or the user might convince the server to overwrite the buffer.
     */

    if (arg->argCInOut != argNULL) {
	const char *msgfield = InArgMsgField(arg->argCInOut);

	fprintf(file, "\tif (%s < %s)\n", msgfield, arg->argVarName);
	fprintf(file, "\t\t%s = %s;\n", arg->argVarName, msgfield);
    }

    fprintf(file, "\n");
}

static void
WriteInitializePtr(FILE *file, const argument_t *arg)
{
    if (akCheck(arg->argKind, akbVarNeeded))
	fprintf(file, "\t%sP = %s;\n",
		arg->argVarName, arg->argVarName);
    else
	fprintf(file, "\t%sP = OutP->%s;\n",
		arg->argVarName, arg->argMsgField);
}

static void
WriteTypeCheckArg(FILE *file, const argument_t *arg)
{
    if (akCheck(arg->argKind, akbRequest)) {
	WriteTypeCheck(file, arg);

	if (akCheck(arg->argKind, akbVariable))
	    WriteCheckMsgSize(file, arg);
    }
}

static void
WriteAdjustRequestMsgPtr(FILE *file, const argument_t *arg)
{
    const ipc_type_t *ptype = arg->argType;

    fprintf(file,
	"\tIn%dP = (Request *) ((char *) In%dP + msgh_size_delta - %d);\n\n",
	arg->argRequestPos+1, arg->argRequestPos,
	ptype->itTypeSize + ptype->itPadSize);
}

static void
WriteTypeCheckRequestArgs(FILE *file, const routine_t *rt)
{
    const argument_t *arg;
    const argument_t *lastVarArg;

    lastVarArg = argNULL;
    for (arg = rt->rtArgs; arg != argNULL; arg = arg->argNext) {

	/*
	 * Advance message pointer if the last request argument was
	 * variable-length and the request position will change.
	 */
	if (lastVarArg != argNULL &&
	    lastVarArg->argRequestPos < arg->argRequestPos)
	{
	    WriteAdjustRequestMsgPtr(file, lastVarArg);
	    lastVarArg = argNULL;
	}

	/*
	 * Type-check the argument.
	 */
	WriteTypeCheckArg(file, arg);

	/*
	 * Remember whether this was variable-length.
	 */
	if (akCheckAll(arg->argKind, akbVariable|akbRequest))
	    lastVarArg = arg;
    }
}

static void
WriteExtractArg(FILE *file, const argument_t *arg)
{
    if (akCheckAll(arg->argKind, akbSendRcv|akbVarNeeded))
	WriteExtractArgValue(file, arg);

    if ((akIdent(arg->argKind) == akeCount) &&
	akCheck(arg->argKind, akbReturnSnd))
    {
	ipc_type_t *ptype = arg->argParent->argType;

	if (ptype->itInLine && ptype->itVarArray)
	    WriteInitializeCount(file, arg);
    }

    if (akCheckAll(arg->argKind, akbReturnSnd|akbPointer))
	WriteInitializePtr(file, arg);
}

static void
WriteServerCallArg(FILE *file, const argument_t *arg)
{
    const ipc_type_t *it = arg->argType;
    boolean_t NeedClose = FALSE;

    if (IsKernelServer) {
        /* If the type (incl. array) is handled differently, then we need to
           cast it to the real argument type.  */
        if (it->itKernelPort ||
            (it->itInLine && it->itVarArray && it->itElement->itKernelPort)) {
            /* Some arguments are transformed into the correct type already.  */
            if (!akCheckAll(arg->argKind, akbSendRcv|akbVarNeeded))
              fprintf(file, "(%s%s)", it->itTransType,
                      arg->argByReferenceServer ? "*" : "");
        }
    }

    if (arg->argByReferenceServer)
	fprintf(file, "&");

    if ((it->itInTrans != strNULL) &&
	akCheck(arg->argKind, akbSendRcv) &&
	!akCheck(arg->argKind, akbVarNeeded))
    {
	fprintf(file, "%s(", it->itInTrans);
	NeedClose = TRUE;
    }

    if (akCheck(arg->argKind, akbPointer))
	fprintf(file, "%sP", arg->argVarName);
    else if (akCheck(arg->argKind, akbVarNeeded))
	fprintf(file, "%s", arg->argVarName);
    else if (akCheck(arg->argKind, akbSendRcv)) {
	if (akCheck(arg->argKind, akbIndefinite)) {
	    fprintf(file, "(In%dP->%s%s.msgt_inline) ",
		    arg->argRequestPos,
		    arg->argTTName,
		    arg->argLongForm ? ".msgtl_header" : "");
	    fprintf(file, "? %s ", InArgMsgField(arg));
	    fprintf(file, ": %s%s",
		    InArgMsgField(arg),
		    OOLPostfix);
	}
	else
	    fprintf(file, "%s", InArgMsgField(arg));
    }
    else
	fprintf(file, "OutP->%s", arg->argMsgField);

    if (NeedClose)
	fprintf(file, ")");

    if (!arg->argByReferenceServer && (arg->argMultiplier > 1))
	fprintf(file, " / %d", arg->argMultiplier);
}

static void
WriteDestroyArg(FILE *file, const argument_t *arg)
{
    const ipc_type_t *it = arg->argType;

    if (akCheck(arg->argKind, akbIndefinite)) {
	/*
	 * Deallocate only if out-of-line.
	 *
	 * Also skip deallocation if error occured in processing the RPC.
	 * (Generic RPC handling code will clean up in this case)
	 */
	argument_t *count = arg->argCount;
	ipc_type_t *btype = it->itElement;
	int	multiplier = btype->itTypeSize / btype->itNumber;

	fprintf(file, "\tif (OutP->%s == KERN_SUCCESS)\n",
		arg->argRoutine->rtRetCode->argMsgField);
	fprintf(file, "\t\tif (!In%dP->%s%s.msgt_inline)\n",
		arg->argRequestPos,
		arg->argTTName,
		arg->argLongForm ? ".msgtl_header" : "");
	fprintf(file, "\t\t\t%smig_deallocate((vm_offset_t) %s%s, ",
		SubrPrefix, InArgMsgField(arg), OOLPostfix);
	if (multiplier > 1)
	    fprintf(file, "%d * ", multiplier);
	fprintf(file, " %s);\n", InArgMsgField(count));
    } else {
	if (akCheck(arg->argKind, akbVarNeeded))
	    fprintf(file, "\t%s(%s);\n", it->itDestructor, arg->argVarName);
	else
	    fprintf(file, "\t%s(%s);\n", it->itDestructor,
		InArgMsgField(arg));
    }
}

static void
WriteDestroyPortArg(FILE *file, const argument_t *arg)
{
    const ipc_type_t *it = arg->argType;

    /*
     *	If a translated port argument occurs in the body of a request
     *	message, and the message is successfully processed, then the
     *	port right should be deallocated.  However, the called function
     *	didn't see the port right; it saw the translation.  So we have
     *	to release the port right for it.
     */

    if ((it->itInTrans != strNULL) &&
	(it->itOutName == MACH_MSG_TYPE_PORT_SEND))
    {
	fprintf(file, "\n");
	fprintf(file, "\tif (IP_VALID(%s))\n", InArgMsgField(arg));
	fprintf(file, "\t\t%sipc_port_release_send(%s);\n",
		SubrPrefix, InArgMsgField(arg));
    }
}

/*
 * Check whether WriteDestroyPortArg would generate any code for arg.
 */
static boolean_t
CheckDestroyPortArg(const argument_t *arg)
{
    const ipc_type_t *it = arg->argType;

    if ((it->itInTrans != strNULL) &&
	(it->itOutName == MACH_MSG_TYPE_PORT_SEND))
    {
	return TRUE;
    }
    return FALSE;
}

static void
WriteServerCall(FILE *file, const routine_t *rt)
{
    boolean_t NeedClose = FALSE;

    fprintf(file, "\t");
    if (rt->rtServerReturn != argNULL)
    {
	const argument_t *arg = rt->rtServerReturn;
	const ipc_type_t *it = arg->argType;

	fprintf(file, "OutP->%s = ", arg->argMsgField);
	if (it->itOutTrans != strNULL)
	{
	    fprintf(file, "%s(", it->itOutTrans);
	    NeedClose = TRUE;
	}
    }
    fprintf(file, "%s(", rt->rtServerName);
    WriteList(file, rt->rtArgs, WriteServerCallArg, akbServerArg, ", ", "");
    if (NeedClose)
	fprintf(file, ")");
    fprintf(file, ");\n");
}

static void
WriteGetReturnValue(FILE *file, const routine_t *rt)
{
    if (rt->rtServerReturn != rt->rtRetCode)
	fprintf(file, "\tOutP->%s = KERN_SUCCESS;\n",
		rt->rtRetCode->argMsgField);
}

static void
WriteCheckReturnValue(FILE *file, const routine_t *rt)
{
    if (rt->rtServerReturn == rt->rtRetCode)
    {
	fprintf(file, "\tif (OutP->%s != KERN_SUCCESS)\n",
		rt->rtRetCode->argMsgField);
	fprintf(file, "\t\treturn;\n");
    }
}

static void
WritePackArgType(FILE *file, const argument_t *arg)
{
    fprintf(file, "\n");

    WritePackMsgType(file, arg->argType,
		     arg->argType->itIndefinite ? d_NO : arg->argDeallocate,
		     arg->argLongForm, !IsKernelServer,
		     "OutP->%s", "%s", arg->argTTName);
}

static void
WritePackArgValue(FILE *file, const argument_t *arg)
{
    const ipc_type_t *it = arg->argType;

    fprintf(file, "\n");

    if (it->itInLine && it->itVarArray) {

	if (it->itString) {
	    /*
	     *	Copy variable-size C string with mig_strncpy.
	     *	Save the string length (+ 1 for trailing 0)
	     *	in the argument`s count field.
	     */
	    fprintf(file,
		"\tOutP->%s = %smig_strncpy(OutP->%s, %s, %d);\n",
		arg->argCount->argMsgField,
		SubrPrefix,
		arg->argMsgField,
		arg->argVarName,
		it->itNumber);
	    fprintf(file,
		"\tif (OutP->%s < %d) OutP->%s += 1;\n",
		arg->argCount->argMsgField,
		it->itNumber,
	        arg->argCount->argMsgField);
	}
	else {
	    argument_t *count = arg->argCount;
	    ipc_type_t *btype = it->itElement;

	    /* Note btype->itNumber == count->argMultiplier */

	    if (it->itIndefinite) {
		/*
		 * If we are packing argument, it must be from
		 * a local variable.
		 */
		fprintf(file, "\tif (%sP != %s) {\n",
			arg->argVarName,
			arg->argVarName);
		fprintf(file, "\t\tOutP->%s%s.msgt_inline = FALSE;\n",
			arg->argTTName,
			arg->argLongForm ? ".msgtl_header" : "");
		if (arg->argDeallocate == d_YES)
		    fprintf(file, "\t\tOutP->%s%s.msgt_deallocate = TRUE;\n",
			    arg->argTTName,
			    arg->argLongForm ? ".msgtl_header" : "");
		else if (arg->argDeallocate == d_MAYBE)
		    fprintf(file, "\t\tOutP->%s%s.msgt_deallocate = %s;\n",
			    arg->argTTName,
			    arg->argLongForm ? ".msgtl_header" : "",
			    arg->argDealloc->argVarName);
		fprintf(file, "\t\tOutP->%s%s = %sP;\n",
			arg->argMsgField,
			OOLPostfix,
			arg->argVarName);
		if (!arg->argRoutine->rtSimpleFixedReply)
		    fprintf(file, "\t\tmsgh_simple = FALSE;\n");
		fprintf(file, "\t}\n\telse {\n\t");
	    }
	    fprintf(file, "\tmemcpy(OutP->%s, %s, ",
		    arg->argMsgField, arg->argVarName);
	    if (btype->itTypeSize > 1)
		fprintf(file, "%d * ",
			btype->itTypeSize);
	    fprintf(file, "%s);\n",
		count->argVarName);
	    if (it->itIndefinite)
		fprintf(file, "\t}\n");
	}
    }
    else if (arg->argMultiplier > 1)
	WriteCopyType(file, it, "OutP->%s", "/* %s */ %d * %s",
		      arg->argMsgField,
		      arg->argMultiplier,
		      arg->argVarName);
    else if (it->itOutTrans != strNULL)
	WriteCopyType(file, it, "OutP->%s", "/* %s */ %s(%s)",
		      arg->argMsgField, it->itOutTrans, arg->argVarName);
    else
	WriteCopyType(file, it, "OutP->%s", "/* %s */ %s",
		      arg->argMsgField, arg->argVarName);
}

static void
WriteCopyArgValue(FILE *file, const argument_t *arg)
{
    fprintf(file, "\n");
    WriteCopyType(file, arg->argType, "/* %d */ OutP->%s", "In%dP->%s",
		  arg->argRequestPos, arg->argMsgField);
}

static void
WriteAdjustMsgSimple(FILE *file, const argument_t *arg)
{
    /* akbVarNeeded must be on */

    if (!arg->argRoutine->rtSimpleFixedReply)
    {
	fprintf(file, "\n");
	fprintf(file, "\tif (MACH_MSG_TYPE_PORT_ANY(%s))\n", arg->argVarName);
	fprintf(file, "\t\tmsgh_simple = FALSE;\n");
    }
}

static void
WriteAdjustMsgCircular(FILE *file, const argument_t *arg)
{
    fprintf(file, "\n");

    if (arg->argType->itOutName == MACH_MSG_TYPE_POLYMORPHIC)
	fprintf(file, "\tif (%s == MACH_MSG_TYPE_PORT_RECEIVE)\n",
		arg->argPoly->argVarName);

    /*
     *	The carried port right can be accessed in OutP->XXXX.  Normally
     *	the server function stuffs it directly there.  If it is InOut,
     *	then it has already been copied into the reply message.
     *	If the server function deposited it into a variable (perhaps
     *	because the reply message is variable-sized) then it has already
     *	been copied into the reply message.  Note we must use InHeadP
     *	(or In0P->Head) and OutHeadP to access the message headers,
     *	because of the variable-sized messages.
     */

    fprintf(file, "\tif (IP_VALID((ipc_port_t) InHeadP->msgh_reply_port) &&\n");
    fprintf(file, "\t    IP_VALID((ipc_port_t) OutP->%s) &&\n", arg->argMsgField);
    fprintf(file, "\t    %sipc_port_check_circularity((ipc_port_t) OutP->%s, (ipc_port_t) InHeadP->msgh_reply_port))\n",
	    SubrPrefix, arg->argMsgField);
    fprintf(file, "\t\tOutHeadP->msgh_bits |= MACH_MSGH_BITS_CIRCULAR;\n");
}

/*
 * Calculate the size of a variable-length message field.
 */
static void
WriteArgSize(FILE *file, const argument_t *arg)
{
    const ipc_type_t *ptype = arg->argType;
    int bsize = ptype->itElement->itTypeSize;
    const argument_t *count = arg->argCount;

    if (ptype->itIndefinite) {
	/*
	 * Check descriptor.  If out-of-line, use standard size.
	 */
	fprintf(file, "(OutP->%s%s.msgt_inline) ? ",
		arg->argTTName,
		arg->argLongForm ? ".msgtl_header" : "");
    }

    if (bsize % word_size != 0)
	fprintf(file, "(");

    if (bsize > 1)
	fprintf(file, "%d * ", bsize);
    if (ptype->itString)
	/* get count from descriptor in message */
	fprintf(file, "OutP->%s", count->argMsgField);
    else
	/* get count from argument */
	fprintf(file, "%s", count->argVarName);

    /*
     * If the base type size is not a multiple of word_size,
     * we have to round up.
     */
    if (bsize % word_size != 0)
	fprintf(file, " + %d) & ~%d", word_size - 1, word_size - 1);

    if (ptype->itIndefinite) {
	fprintf(file, " : sizeof(%s *)",
		FetchServerType(ptype->itElement));
    }
}

/*
 * Adjust message size and advance reply pointer.
 * Called after packing a variable-length argument that
 * has more arguments following.
 */
static void
WriteAdjustMsgSize(FILE *file, const argument_t *arg)
{
    routine_t *rt = arg->argRoutine;
    ipc_type_t *ptype = arg->argType;

    /* There are more Out arguments.  We need to adjust msgh_size
       and advance OutP, so we save the size of the current field
       in msgh_size_delta. */

    fprintf(file, "\tmsgh_size_delta = ");
    WriteArgSize(file, arg);
    fprintf(file, ";\n");

    if (rt->rtNumReplyVar == 1)
	/* We can still address the message header directly.  Fill
	   in the size field. */

	fprintf(file, "\tOutP->Head.msgh_size = %d + msgh_size_delta;\n",
			rt->rtReplySize);
    else
    if (arg->argReplyPos == 0)
	/* First variable-length argument.  The previous msgh_size value
	   is the minimum reply size. */

	fprintf(file, "\tmsgh_size = %d + msgh_size_delta;\n",
		rt->rtReplySize);
    else
	fprintf(file, "\tmsgh_size += msgh_size_delta;\n");

    fprintf(file,
	"\tOutP = (Reply *) ((char *) OutP + msgh_size_delta - %d);\n",
	ptype->itTypeSize + ptype->itPadSize);
}

/*
 * Calculate the size of the message.  Called after the
 * last argument has been packed.
 */
static void
WriteFinishMsgSize(FILE *file, const argument_t *arg)
{
    /* No more Out arguments.  If this is the only variable Out
       argument, we can assign to msgh_size directly. */

    if (arg->argReplyPos == 0) {
	fprintf(file, "\tOutP->Head.msgh_size = %d + (",
			arg->argRoutine->rtReplySize);
	WriteArgSize(file, arg);
	fprintf(file, ");\n");
    }
    else {
	fprintf(file, "\tmsgh_size += ");
	WriteArgSize(file, arg);
	fprintf(file, ";\n");
    }
}

static void
WritePackArg(FILE *file, const argument_t *arg)
{
    if (akCheck(arg->argKind, akbReplyInit))
	WritePackArgType(file, arg);

    if ((akIdent(arg->argKind) == akePoly) &&
	akCheck(arg->argKind, akbReturnSnd))
	WriteAdjustMsgSimple(file, arg);

    if (akCheckAll(arg->argKind, akbReturnSnd|akbVarNeeded))
	WritePackArgValue(file, arg);
    else if (akCheckAll(arg->argKind, akbReturnSnd|akbVariable)) {
	const ipc_type_t *it = arg->argType;

	if (it->itString) {
	    /* Need to call strlen to calculate the size of the argument. */
	    fprintf(file, "\tOutP->%s = strlen(OutP->%s) + 1;\n",
		    arg->argCount->argMsgField, arg->argMsgField);
	} else if (it->itIndefinite) {
	    /*
	     * We know that array is in reply message.
	     */
	    fprintf(file, "\tif (%sP != OutP->%s) {\n",
			arg->argVarName,
			arg->argMsgField);
	    fprintf(file, "\t\tOutP->%s%s.msgt_inline = FALSE;\n",
		    arg->argTTName,
		    arg->argLongForm ? ".msgtl_header" : "");
	    if (arg->argDeallocate == d_YES)
		fprintf(file, "\t\tOutP->%s%s.msgt_deallocate = TRUE;\n",
			arg->argTTName,
			arg->argLongForm ? ".msgtl_header" : "");
	    else if (arg->argDeallocate == d_MAYBE)
		fprintf(file, "\t\tOutP->%s%s.msgt_deallocate = %s;\n",
			arg->argTTName,
			arg->argLongForm ? ".msgtl_header" : "",
			arg->argDealloc->argVarName);
	    fprintf(file, "\t\tOutP->%s%s = %sP;\n",
			arg->argMsgField,
			OOLPostfix,
			arg->argVarName);
	    if (!arg->argRoutine->rtSimpleFixedReply)
		fprintf(file, "\t\tmsgh_simple = FALSE;\n");
	    fprintf(file, "\t}\n");
	}
    }

    if (akCheck(arg->argKind, akbReplyCopy))
	WriteCopyArgValue(file, arg);

    /*
     *	If this is a KernelServer, and the reply message contains
     *	a receive right, we must check for the possibility of a
     *	port/message circularity.  If queueing the reply message
     *	would cause a circularity, we mark the reply message
     *	with the circular bit.
     */

    if (IsKernelServer &&
	akCheck(arg->argKind, akbReturnSnd) &&
	((arg->argType->itOutName == MACH_MSG_TYPE_PORT_RECEIVE) ||
	 (arg->argType->itOutName == MACH_MSG_TYPE_POLYMORPHIC)))
	WriteAdjustMsgCircular(file, arg);
}

/*
 * Handle reply arguments - fill in message types and copy arguments
 * that need to be copied.
 */
static void
WritePackReplyArgs(FILE *file, const routine_t *rt)
{
    const argument_t *arg;
    const argument_t *lastVarArg;

    lastVarArg = argNULL;
    for (arg = rt->rtArgs; arg != argNULL; arg = arg->argNext) {

	/*
	 * Adjust message size and advance message pointer if
	 * the last reply argument was variable-length and the
	 * request position will change.
	 */
	if (lastVarArg != argNULL &&
	    lastVarArg->argReplyPos < arg->argReplyPos)
	{
	    WriteAdjustMsgSize(file, lastVarArg);
	    lastVarArg = argNULL;
	}

	/*
	 * Copy the argument
	 */
	WritePackArg(file, arg);

	/*
	 * Remember whether this was variable-length.
	 */
	if (akCheckAll(arg->argKind, akbReturnSnd|akbVariable))
	    lastVarArg = arg;
    }

    /*
     * Finish the message size.
     */
    if (lastVarArg != argNULL)
	WriteFinishMsgSize(file, lastVarArg);
}

static void
WriteFieldDecl(FILE *file, const argument_t *arg)
{
    WriteFieldDeclPrim(file, arg, FetchServerType);
}

static void
WriteDefaultRoutine(FILE *file, const routine_t *rt)
{
    fprintf(file, "\n/* Default implementation of %s */\n",
	    rt->rtServerName);

    fprintf(file, "#ifdef\tMIG_EOPNOTSUPP\n");

    fprintf(file, "%s __attribute__ ((weak))\n%s\n",
	    ReturnTypeStr(rt), rt->rtServerName);
    fprintf(file, "(\n");
    WriteList(file, rt->rtArgs, WriteServerVarDecl,
	      akbServerArg, ",\n", "\n");

    if (rt->rtReturn == argNULL)
	fprintf(file, ") {}\n");
    else
	fprintf(file, ") { return MIG_EOPNOTSUPP; }\n");

    fprintf(file, "#endif\t/* MIG_EOPNOTSUPP */\n");
}

static void
WriteRoutine(FILE *file, const routine_t *rt)
{
    fprintf(file, "\n");

    fprintf(file, "/* %s %s */\n", rtRoutineKindToStr(rt->rtKind), rt->rtName);
    fprintf(file, "mig_internal void _X%s\n", rt->rtName);
    fprintf(file, "\t(mach_msg_header_t *InHeadP, mach_msg_header_t *OutHeadP)\n");

    fprintf(file, "{\n");
    WriteStructDecl(file, rt->rtArgs, WriteFieldDecl, akbRequest, "Request");
    WriteStructDecl(file, rt->rtArgs, WriteFieldDecl, akbReply, "Reply");

    WriteVarDecls(file, rt);

    WriteList(file, rt->rtArgs, WriteCheckDecl, akbRequestQC, "\n", "\n");
    WriteList(file, rt->rtArgs,
	      IsKernelServer ? WriteTypeDeclOutServer : WriteTypeDeclInServer,
	      akbReplyInit, "\n", "\n");

    WriteList(file, rt->rtArgs, WriteLocalVarDecl,
	      akbVarNeeded, ";\n", ";\n\n");
    WriteList(file, rt->rtArgs, WriteLocalPtrDecl,
	      akbPointer, ";\n", ";\n\n");

    WriteCheckHead(file, rt);

    WriteTypeCheckRequestArgs(file, rt);
    WriteList(file, rt->rtArgs, WriteExtractArg, akbNone, "", "");

    WriteServerCall(file, rt);
    WriteGetReturnValue(file, rt);

    WriteReverseList(file, rt->rtArgs, WriteDestroyArg, akbDestroy, "", "");

    /*
     * For one-way routines, it doesn`t make sense to check the return
     * code, because we return immediately afterwards.  However,
     * kernel servers may want to deallocate port arguments - and the
     * deallocation must not be done if the return code is not KERN_SUCCESS.
     */
    if (rt->rtOneWay || rt->rtNoReplyArgs)
    {
	if (IsKernelServer)
	{
	    if (rtCheckMaskFunction(rt->rtArgs, akbSendBody|akbSendRcv,
				CheckDestroyPortArg))
	    {
		WriteCheckReturnValue(file, rt);
	    }
	    WriteReverseList(file, rt->rtArgs, WriteDestroyPortArg,
			 akbSendBody|akbSendRcv, "", "");
	}
    }
    else
    {
	WriteCheckReturnValue(file, rt);

	if (IsKernelServer)
	    WriteReverseList(file, rt->rtArgs, WriteDestroyPortArg,
			 akbSendBody|akbSendRcv, "", "");

	WriteReplyInit(file, rt);
	WritePackReplyArgs(file, rt);
	WriteReplyHead(file, rt);
    }

    fprintf(file, "}\n");

    WriteDefaultRoutine(file, rt);
}

void
WriteServer(FILE *file, const statement_t *stats)
{
    const statement_t *stat;

    WriteProlog(file);
    for (stat = stats; stat != stNULL; stat = stat->stNext)
	switch (stat->stKind)
	{
	  case skRoutine:
	    WriteRoutine(file, stat->stRoutine);
	    break;
	  case skImport:
	  case skSImport:
	    WriteImport(file, stat->stFileName);
	    break;
	  case skUImport:
	    break;
	  default:
	    fatal("WriteServer(): bad statement_kind_t (%d)",
		  (int) stat->stKind);
	}
    WriteEpilog(file, stats);
}