Repository navigation
Expand file tree
/
Copy pathomf.c
More file actions
1683 lines (1500 loc) · 56.1 KB
/
Copy pathomf.c
File metadata and controls
1683 lines (1500 loc) · 56.1 KB
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
/****************************************************************************
*
* Open Watcom Project
*
* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
* ========================================================================
*
* This file contains Original Code and/or Modifications of Original
* Code as defined in and that are subject to the Sybase Open Watcom
* Public License version 1.0 (the 'License'). You may not use this file
* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
* provided with the Original Code and Modifications, and is also
* available at www.sybase.com/developer/opensource.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
* NON-INFRINGEMENT. Please see the License for the specific language
* governing rights and limitations under the License.
*
* ========================================================================
*
* Description: handle OMF output format.
*
****************************************************************************/
#include <limits.h>
#include <ctype.h>
#include <time.h>
#include <sys/stat.h>
#include "globals.h"
#include "memalloc.h"
#include "parser.h"
#include "segment.h"
#include "mangle.h"
#include "extern.h"
#include "fixup.h"
#include "omf.h"
#include "omfint.h"
#include "omfspec.h"
#include "fastpass.h"
#include "myassert.h"
#include "tokenize.h" /* needed because of StringBufferEnd usage */
#include "input.h"
#include "linnum.h"
#define TRUNCATE 1
#define MULTIHDR 1 /* write muliple THEADR records (Masm compatible) */
#define WRITEIMPDEF 0 /* write IMPDEF coment records for OPTION DLLIMPORT */
#define MANGLE_BYTES 8 /* extra size required for name decoration */
#define MAX_ID_LEN_OMF 247
#define MAX_LNAME_SIZE 1024
#define MAX_EXT_LENGTH 1020 /* max length ( in chars ) of EXTDEF */
#define MAX_PUB_LENGTH 1024 /* max length of PUBDEF record */
#if TRUNCATE
#if defined(__UNIX__) || defined(__CYGWIN__) || defined(__DJGPP__)
#include <unistd.h>
#else
#include <io.h>
#endif
#endif
#if defined(__UNIX__) || defined(__CYGWIN__)
#define _stat stat
#endif
#define TruncRec(objr) (void)( (objr)->length = (objr)->curoff )
enum {
TIME_SEC_B = 0,
TIME_SEC_F = 0x001f,
TIME_MIN_B = 5,
TIME_MIN_F = 0x07e0,
TIME_HOUR_B = 11,
TIME_HOUR_F = 0xf800
};
enum {
DATE_DAY_B = 0,
DATE_DAY_F = 0x001f,
DATE_MON_B = 5,
DATE_MON_F = 0x01e0,
DATE_YEAR_B = 9,
DATE_YEAR_F = 0xfe00
};
union DOS_DATETIME {
struct {
unsigned short time;
unsigned short date;
} dos;
time_t timet;
};
extern void cv_write_debug_tables( struct dsym *, struct dsym *, void * );
extern void SortSegments( int );
extern struct qdesc LinnumQueue; /* queue of line_num_info items */
extern const char szNull[];
/* LastCodeBufSize stores the size of the code buffer AFTER it has been written in omf_write_ledata().
* This allows to get the content bytes for the listing.
* This is a rather hackish "design" and is to be improved.
*/
int_32 LastCodeBufSize;
static uint_32 seg_pos; /* file pos of SEGDEF record(s) */
static uint_32 public_pos; /* file pos of PUBDEF record(s) */
static uint_32 end_of_header; /* file pos of "end of header" */
/* v2.12: moved from inside omf_write_lnames() */
static int startitem;
static int startext;
#if MULTIHDR
static unsigned ln_srcfile; /* last file for which line numbers have been written */
#endif
static uint_8 ln_is32; /* last mode for which line numbers have been written */
static uint_16 ln_size; /* size of line number info */
/* CodeView symbolic debug info */
enum dbgseg_index {
DBGS_SYMBOLS,
DBGS_TYPES,
DBGS_MAX
};
struct dbg_section {
const char *name;
const char *cname;
};
static const struct dbg_section SymDebParm[DBGS_MAX] = {
{ "$$SYMBOLS", "DEBSYM" },
{ "$$TYPES", "DEBTYP" },
};
static struct dsym *SymDebSeg[DBGS_MAX];
static void omf_InitRec( struct omf_rec *obj, uint_8 command )
/************************************************************/
{
obj->length = 0;
obj->curoff = 0;
obj->data = NULL;
obj->command = command;
obj->is_32 = 0;
DebugMsg1(("omf_InitRec(%p, %X)\n", obj, command ));
return;
}
static time_t timet2dostime( time_t x )
/*************************************/
{
struct tm * ltime;
union DOS_DATETIME dt;
ltime = localtime( &x );
dt.dos.date = (( ltime->tm_year - 80 ) << DATE_YEAR_B )
| (( ltime->tm_mon + 1 ) << DATE_MON_B )
| (( ltime->tm_mday ) << DATE_DAY_B );
dt.dos.time = (( ltime->tm_hour ) << TIME_HOUR_B )
| (( ltime->tm_min ) << TIME_MIN_B )
| (( ltime->tm_sec / 2 ) << TIME_SEC_B );
return( dt.timet );
}
static void Put8( struct omf_rec *objr, uint_8 value )
/****************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL );
objr->data[ objr->curoff++ ] = value;
}
static void Put16( struct omf_rec *objr, uint_16 value )
/******************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL );
WriteU16( objr->data + objr->curoff, value );
objr->curoff += sizeof( uint_16 );
}
static void Put32( struct omf_rec *objr, uint_32 value )
/******************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL );
WriteU32( objr->data + objr->curoff, value );
objr->curoff += sizeof( uint_32 );
}
#if 0
static void PutEither( struct omf_rec *objr, uint_32 data )
/*********************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL );
if( objr->is_32 ) {
WriteU32( objr->data + objr->curoff, data );
objr->curoff += sizeof( uint_32 );
} else {
WriteU16( objr->data + objr->curoff, data );
objr->curoff += sizeof( uint_16 );
}
}
#endif
/* index in OMF is limited to 0-7FFFh
* index values 0-7Fh are stored in 1 byte.
* index values 80h-7FFFh are stored in 2 bytes, the high
* order byte first ( with bit 7=1 ).
*/
static void PutIndex( struct omf_rec *objr, unsigned idx )
/********************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL && idx <= 0x7FFF );
if( idx > 0x7f ) {
objr->data[objr->curoff++] = ( idx >> 8 ) | 0x80;
}
objr->data[objr->curoff++] = idx & 0xff;
}
static void PutData( struct omf_rec *objr, const uint_8 *data, size_t len )
/*************************************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL );
memcpy( objr->data + objr->curoff, data, len );
objr->curoff += len;
}
static void PutName( struct omf_rec *objr, const char *name, size_t len )
/***********************************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL );
#if MAX_ID_LEN > MAX_ID_LEN_OMF
if ( len > MAX_ID_LEN_OMF ) {
EmitWarn( 1, IDENTIFIER_TOO_LONG );
len = MAX_ID_LEN_OMF;
}
#endif
objr->data[objr->curoff++] = len;
PutData( objr, (uint_8 *)name, len );
}
static void AttachData( struct omf_rec *objr, uint_8 *data, size_t len )
/**********************************************************************/
{
/**/myassert( objr->data == NULL );
objr->data = data;
objr->length = len;
}
#if 0
static void AllocData( struct omf_rec *objr, size_t len )
/*******************************************************/
{
/**/myassert( objr->data == NULL );
objr->data = LclAlloc( len );
objr->length = len;
}
#endif
/* return a group's index */
unsigned omf_GetGrpIdx( struct asym *sym )
/****************************************/
{
return( sym ? ((struct dsym *)sym)->e.grpinfo->grp_idx : 0 );
}
/*
* write OMF comment records about data in code.
*/
void omf_OutSelect( bool is_data )
/********************************/
{
struct omf_rec obj;
uint_32 currofs;
int sel_idx;
static uint_32 sel_start; /* start offset of data items */
unsigned char buffer[12]; /* max is 11 ( see below ) */
if( is_data ) {
/* do nothing if it isn't the first data item or
* if current segment isn't code
*/
if( CurrSeg->e.seginfo->data_in_code ||
( CurrSeg->e.seginfo->segtype != SEGTYPE_CODE ) )
return;
sel_start = GetCurrOffset();
CurrSeg->e.seginfo->data_in_code = TRUE;
DebugMsg(("omf_OutSelect: data in code segment (%s), starting at %" I32_SPEC "X\n", CurrSeg->sym.name, sel_start ));
} else if ( CurrSeg->e.seginfo->data_in_code ) { /* data items written? */
CurrSeg->e.seginfo->data_in_code = FALSE;
if( write_to_file == TRUE ) {
omf_InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = CMT_TNP;
obj.d.coment.cmt_class = CMT_DISASM_DIRECTIVE;
sel_idx = GetSegIdx( &CurrSeg->sym );
//AllocData( objr, 11 ); /* 11 = 1 + 2 + 4 + 4 */
AttachData( &obj, buffer, 11 ); /* 11 = 1 + 2 + 4 + 4 */
currofs = GetCurrOffset();
DebugMsg(("omf_OutSelect: writing coment record about data in code: start=%" I32_SPEC "X curofs=%" I32_SPEC "X\n", sel_start, currofs ));
if( ( sel_start > 0xffffUL ) || ( currofs > 0xffffUL ) ) {
Put8( &obj, DDIR_SCAN_TABLE_32 );
PutIndex( &obj, sel_idx );
Put32( &obj, sel_start );
Put32( &obj, currofs );
} else {
Put8( &obj, DDIR_SCAN_TABLE );
PutIndex( &obj, sel_idx );
Put16( &obj, sel_start );
Put16( &obj, currofs );
}
TruncRec( &obj );
omf_write_record( &obj );
}
}
}
/* write line number debug info.
* since v2.11, it's ensured that the size of this info will be < 1024.
* note the item structure:
* uint_16 line_number;
* union {
* uint_16 ofs16;
* uint_32 ofs32;
* };
* v2.11: create 16- or 32-bit data variant here!
*/
static void omf_write_linnum( uint_8 is32 )
/*****************************************/
{
unsigned ofssize = ( is32 ? sizeof( uint_32) : sizeof( uint_16 ) );
unsigned size;
uint_8 *data;
struct line_num_info *node;
struct line_num_info *next;
struct omf_rec obj;
for( node = LinnumQueue.head, data = StringBufferEnd; node; node = next ) {
next = node->next;
*(uint_16 *)data = node->number;
data += sizeof( uint_16 );
*(uint_32 *)data = node->offset;
data += ofssize;
LclFree( node );
}
LinnumQueue.head = NULL;
size = (char *)data - StringBufferEnd;
if( size ) {
omf_InitRec( &obj, CMD_LINNUM );
obj.is_32 = is32;
AttachData( &obj, StringBufferEnd, size );
obj.d.linnum.base.grp_idx = omf_GetGrpIdx( GetGroup( &CurrSeg->sym ) ); /* fixme ? */
obj.d.linnum.base.seg_idx = CurrSeg->e.seginfo->seg_idx;
obj.d.linnum.base.frame = 0; /* field not used here */
omf_write_record( &obj );
}
return;
}
static void omf_write_fixupp( struct dsym *seg, char is32 )
/*********************************************************/
{
uint_8 *data;
unsigned size;
struct fixup *fix;
enum fixup_types type = ( is32 ? FIX_GEN_MS386 : FIX_GEN_INTEL );
struct omf_rec obj;
fix = seg->e.seginfo->FixupList.head;
while ( fix ) {
for( data = StringBufferEnd, size = 0; fix; fix = fix->nextrlc ) {
switch( fix->type ) {
case FIX_RELOFF32:
case FIX_OFF32:
case FIX_PTR32:
if ( !is32 ) continue;
break;
default:
if ( is32 ) continue;
break;
}
if ( size > 1020 - FIX_GEN_MAX )
break;
data += OmfFixGenFix( fix, seg->e.seginfo->start_loc, data, type );
size = (char *)data - StringBufferEnd;
}
if ( size ) {
omf_InitRec( &obj, CMD_FIXUPP );
obj.is_32 = is32;
AttachData( &obj, StringBufferEnd, size );
omf_write_record( &obj );
}
}
}
static uint_8 get_omfalign( uint_8 alignment );
/* write an LEDATA record, optionally write fixups */
static void omf_write_ledata( struct dsym *seg )
/**********************************************/
{
struct omf_rec obj;
int_32 size;
size = seg->e.seginfo->current_loc - seg->e.seginfo->start_loc;
DebugMsg1(( "omf_write_ledata enter, buffer=%p start ofs=%" I32_SPEC "X, size=%" I32_SPEC "X\n",
seg->e.seginfo->CodeBuffer, seg->e.seginfo->start_loc, size ));
if( size > 0 && write_to_file == TRUE ) {
LastCodeBufSize = size;
#if COMDATSUPP
if ( seg->e.seginfo->comdat_selection ) {
/* if the COMDAT symbol has been referenced in a FIXUPP,
* a CEXTDEF has to be written.
*/
if ( seg->sym.used ) {
omf_InitRec( &obj, CMD_CEXTDEF );
AttachData( &obj, StringBufferEnd, 2 * sizeof( uint_16 ) );
PutIndex( &obj, seg->e.seginfo->comdat_idx ); /* Index */
PutIndex( &obj, 0 ); /* Type */
TruncRec( &obj );
omf_write_record( &obj );
if ( seg->e.seginfo->seg_idx == 0 )
seg->e.seginfo->seg_idx = startext++;
}
omf_InitRec( &obj, CMD_COMDAT );
AttachData( &obj, seg->e.seginfo->CodeBuffer, size );
if( seg->e.seginfo->start_loc > 0xffffUL )
obj.is_32 = 1;
obj.d.comdat.flags = 0;
/* low 4-bits is allocation type */
if ( seg->e.seginfo->segtype == SEGTYPE_CODE ) {
obj.d.comdat.attributes = ( ModuleInfo.model == MODEL_FLAT ? COMDAT_CODE32 : COMDAT_FAR_CODE );
} else {
obj.d.comdat.attributes = ( ModuleInfo.model == MODEL_FLAT ? COMDAT_DATA32 : COMDAT_FAR_DATA );
}
obj.d.comdat.align = get_omfalign( seg->e.seginfo->alignment );
obj.d.comdat.offset = seg->e.seginfo->start_loc;
obj.d.comdat.type_idx = 0;
obj.d.comdat.public_lname_idx = seg->e.seginfo->comdat_idx;
/* todo: error if comdat_idx is 0 */
} else {
#endif
omf_InitRec( &obj, CMD_LEDATA );
AttachData( &obj, seg->e.seginfo->CodeBuffer, size );
obj.d.ledata.idx = seg->e.seginfo->seg_idx;
obj.d.ledata.offset = seg->e.seginfo->start_loc;
if( obj.d.ledata.offset > 0xffffUL )
obj.is_32 = 1;
#if COMDATSUPP
}
#endif
omf_write_record( &obj );
/* process Fixup, if any */
if( seg->e.seginfo->FixupList.head != NULL ) {
#if FASTMEM==0
struct fixup *fix;
struct fixup *next;
#endif
omf_write_fixupp( seg, 0 );
omf_write_fixupp( seg, 1 );
#if FASTMEM==0
for( fix = seg->e.seginfo->FixupList.head; fix; ) {
next = fix->nextrlc;
LclFree( fix );
fix = next;
}
#endif
seg->e.seginfo->FixupList.head = seg->e.seginfo->FixupList.tail = NULL;
}
}
seg->e.seginfo->start_loc = seg->e.seginfo->current_loc;
}
/*
* flush current segment.
* write_to_file is always TRUE here
*/
void omf_FlushCurrSeg( void )
/***************************/
{
//unsigned i;
//unsigned size;
DebugMsg1(( "omf_FlushCurrSeg() enter, CurrSeg=%s, currsrc=%u\n", CurrSeg ? CurrSeg->sym.name : "NULL", get_curr_srcfile() ));
omf_write_ledata( CurrSeg );
/* add line numbers if debugging info is desired */
//if( write_to_file && Options.line_numbers ) {
if( Options.line_numbers ) {
omf_write_linnum( ln_is32 );
ln_size = 0;
}
//if ( Options.no_comment_data_in_code_records == FALSE )
// omf_OutSelect( FALSE );
return;
}
/* Write a THEADR record.
*/
static void omf_write_theadr( const char *name )
/**********************************************/
{
struct omf_rec obj;
unsigned len;
//const struct fname_item *fn;
DebugMsg1(("omf_write_theadr(%s) enter\n", name));
omf_InitRec( &obj, CMD_THEADR );
/* v2.08: use the name given at the cmdline, that's what Masm does.
* Masm emits either a relative or a full path, depending on what
* was given as filename!
*/
len = strlen( name );
AttachData( &obj, StringBufferEnd, len + 1 );
PutName( &obj, name, len );
omf_write_record( &obj );
DebugMsg1(("omf_write_theadr() exit\n"));
}
/* v2.11: check if
* - source file is changing
* - offset magnitude is changing
* - size of line number info exceeds 1024
* if at least one of these conditions are met AND there are linnum items
* in the queue, then flush the current LEDATA buffer.
* If source file changed, write a THEADR record for the new source file.
* ( Masm also emits THEADR records, but more frequently -
* it doesn't care if linnum items are written or have been written. )
*
* This function is called by AddLinnumDataRef(), that is, whenever a linnum
* info is about to be written.
*/
void omf_check_flush( const struct line_num_info *curr )
/******************************************************/
{
uint_8 is_32;
uint_16 size;
#if MULTIHDR
if ( curr->srcfile != ln_srcfile ) {
if ( LinnumQueue.head )
omf_FlushCurrSeg();
/* todo: for Borland, there's a COMENT ( CMT_SRCFILE ) that could be written
* instead of THEADR.
*/
omf_write_theadr( GetFName( curr->srcfile )->fname );
ln_srcfile = curr->srcfile;
return;
}
#endif
/* if there's a change in offset magnitude ( 16 -> 32 or 32 -> 16 ),
* do flush ( Masm compatible ).
*/
is_32 = ( curr->offset > 0xffff ? TRUE : FALSE );
if ( ln_is32 != is_32 ) {
if ( LinnumQueue.head )
omf_FlushCurrSeg();
ln_is32 = is_32;
return;
}
/* line number item consists of 16-bit line# and 16- or 32-bit offset */
size = sizeof( uint_16 ) + ( is_32 ? sizeof( uint_32 ) : sizeof( uint_16 ) );
/* if the size of the linnum data exceeds 1016,
* do flush ( Masm compatible ).
*/
if ( ln_size + size > 1024 - 8 ) {
if ( LinnumQueue.head )
omf_FlushCurrSeg();
}
ln_size += size;
return;
};
/*------------------------------------------------------*/
/* write end of pass 1 record. */
static void omf_end_of_pass1( void )
/**********************************/
{
struct omf_rec obj;
omf_InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = 0x00;
obj.d.coment.cmt_class = CMT_MS_END_PASS_1;
AttachData( &obj, (uint_8 *)"\x001", 1 );
omf_write_record( &obj );
}
/* called when a new path is started
* the OMF "path 2" records (LEDATA, FIXUP, LINNUM ) are written in all passes.
*/
void omf_set_filepos( void )
/**************************/
{
DebugMsg1(( "omf_set_filepos: reset file pos to %X\n", end_of_header ));
#if MULTIHDR
#endif
fseek( CurrFile[OBJ], end_of_header, SEEK_SET );
}
static void omf_write_dosseg( void )
/**********************************/
{
struct omf_rec obj;
omf_InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = CMT_TNP;
obj.d.coment.cmt_class = CMT_DOSSEG;
AttachData( &obj, (uint_8 *)"", 0 );
omf_write_record( &obj );
}
static void omf_write_lib( void )
/*******************************/
{
struct omf_rec obj;
struct qitem *curr;
struct qitem *next;
char *name;
DebugMsg1(("omf_write_lib() enter\n"));
for( curr = ModuleInfo.g.LibQueue.head; curr; curr = next ) {
next = curr->next;
name = curr->value;
omf_InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = CMT_TNP;
obj.d.coment.cmt_class = CMT_DEFAULT_LIBRARY;
AttachData( &obj, (uint_8 *)name, strlen( name ) );
omf_write_record( &obj );
}
DebugMsg1(("omf_write_lib() exit\n"));
}
#if DLLIMPORT && WRITEIMPDEF /* writing import records in OMF not supported yet */
void omf_write_import( void )
/***************************/
{
struct dsym *imp;
int len;
struct omf_rec obj;
uint_8 *data;
/* don't do anything if -Fd isn't set or if -Fd was given with a file name */
if ( (!Options.write_impdef) || Options.names[OPTN_LNKDEF_FN] )
return;
for ( imp = SymTables[TAB_EXT].head; imp; imp = imp->next ) {
if ( imp->sym.isproc && ( imp->sym.weak == FALSE || imp->sym.iat_used == TRUE ) ) {
if ( imp->sym.dll && *imp->sym.dll->name ) {
omf_InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = 0x00;
obj.d.coment.cmt_class = CMT_OMF_EXT;
/* structure of IMPDEF "comment":
* type db CMT_EXT_IMPDEF (=01)
* ordinal_flag db ? ;0=import by name
* int_name_len db ?
* int_name db int_name_len dup (?)
* mod_name_len db ?
* mod_name db mod_name_len dup (?)
* union
* entry_ident dw ? ;if by ordinal
* struct ;if by name
* imp_name_len db ? ;may be 0
* imp_name db imp_name_len dup (?)
* ends
* ends
*/
data = StringBufferEnd;
len = Mangle( &imp->sym, data+3 );
AttachData( &obj, data, len + strlen( imp->sym.dll->name ) + 5 ); /* 2 bytes prefix, 2*len prefix, 1 for imp_name_len */
10BC8
Put8( &obj, CMT_EXT_IMPDEF );
Put8( &obj, 0 ); /* import by name */
Put8( &obj, len );
obj.curoff += len;
PutName( &obj, imp->sym.dll->name, strlen( imp->sym.dll->name ) );
Put8( &obj, 0 );
omf_write_record( &obj );
}
}
}
}
#endif
static void omf_write_export( void )
/**********************************/
{
uint_8 parmcnt;
struct dsym *dir;
struct dsym *parm;
struct omf_rec obj;
int len;
uint_8 *data;
#if DLLIMPORT && WRITEIMPDEF /* writing import records in OMF not supported yet */
omf_write_import();
#endif
for( dir = SymTables[TAB_PROC].head; dir != NULL; dir = dir->nextproc ) {
if( dir->e.procinfo->isexport ) {
omf_InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = 0x00;
obj.d.coment.cmt_class = CMT_OMF_EXT;
data = StringBufferEnd;
/* structure of EXPDEF "comment":
* type db CMT_EXT_EXPDEF (=02)
* exported_flag db ?
* ex_name_len db ?
* exported_name db ex_name_len dup (?)
* int_name_len db 0 ;always 0
* ;internal_name db int_name_len dup (?)
* ;ordinal dw ? ;optional
*/
if ( Options.no_export_decoration == FALSE )
len = Mangle( &dir->sym, data+3 );
else {
strcpy( data+3, dir->sym.name );
len = dir->sym.name_size;
}
/* v2.11: case mapping was missing */
if ( ModuleInfo.convert_uppercase )
_strupr( data+3 );
#if MAX_ID_LEN > 255
if ( len > 255 )
len = 255; /* restrict name to 255 chars */
#endif
AttachData( &obj, data, len + 4 );
Put8( &obj, CMT_EXT_EXPDEF );
/* write the "Exported Flag" byte:
* bits 0-4: parameter count
* bit 5: no data (entry doesn't use initialized data )
* bit 6: resident (name should be kept resident)
* bit 7: ordinal ( if 1, 2 byte index must follow name)
*/
for ( parm = dir->e.procinfo->paralist, parmcnt = 0; parm; parm = parm->nextparam, parmcnt++ );
parmcnt &= 0x1F; /* ensure bits 5-7 are still 0 */
Put8( &obj, parmcnt ); /* v2.01: changed from fix 0x00 */
Put8( &obj, len );
obj.curoff += len;
Put8( &obj, 0 );
omf_write_record( &obj );
}
}
}
/* write OMF GRPDEF records
*/
static void omf_write_grpdef( void )
/**********************************/
{
struct dsym *curr;
struct dsym *segminfo;
struct seg_item *seg;
struct omf_rec grp;
//char writeseg;
DebugMsg1(("omf_write_grpdef enter\n"));
//line_num = LineNumber;
/* size of group records may exceed 1024! */
for( curr = SymTables[TAB_GRP].head; curr; curr = curr->next ) {
omf_InitRec( &grp, CMD_GRPDEF );
grp.d.grpdef.idx = curr->e.grpinfo->grp_idx;
/* we might need:
* - 1 or 2 bytes for the group name index
* - 2 or 3 bytes for each segment in the group
*/
AttachData( &grp, StringBufferEnd, 2 + 3 * curr->e.grpinfo->numseg );
/* v2.01: the LName index of the group may be > 0xff */
/* v2.03: use the group index directly */
PutIndex( &grp, curr->e.grpinfo->lname_idx );
for( seg = curr->e.grpinfo->seglist; seg; seg = seg->next ) {
//writeseg = TRUE;
segminfo = (struct dsym *)(seg->seg);
Put8( &grp, GRP_SEGIDX );
PutIndex( &grp, segminfo->e.seginfo->seg_idx );
/* truncate the group record if it comes near output buffer limit! */
if ( grp.curoff > OBJ_BUFFER_SIZE - 10 ) {
EmitWarn( 2, GROUP_DEFINITION_TOO_LARGE, curr->sym.name );
break;
}
}
TruncRec( &grp );
omf_write_record( &grp );
}
DebugMsg1(("omf_write_grpdef exit\n"));
}
static uint_8 get_omfalign( uint_8 alignment )
/********************************************/
{
switch ( alignment ) {
case 1: return( SEGDEF_ALIGN_WORD );
case 2: return( SEGDEF_ALIGN_DWORD );
case 4: return( SEGDEF_ALIGN_PARA );
case 8: return( SEGDEF_ALIGN_PAGE );
#if PAGE4K /* PharLab peculiarity; this is invalid for MS OMF */
case 12:
if ( Parse_Pass == PASS_1 )
EmitWarn( 2, NO_4KPAGE_ALIGNED_SEGMENTS_IN_MS386 );
return( SEGDEF_ALIGN_4KPAGE );
#endif
case MAX_SEGALIGNMENT: return( SEGDEF_ALIGN_ABS );
}
/* value 0 is byte alignment, anything elso is "unexpected" */
/**/myassert( alignment == 0 );
return( SEGDEF_ALIGN_BYTE );
}
/* write segment table.
* This is done after pass 1.
* There might exist entries of undefined segments in
* the segment list!
*/
static void omf_write_segdef( void )
/**********************************/
{
struct dsym *curr;
struct omf_rec obj;
DebugMsg1(("omf_write_segdef enter\n"));
for( curr = SymTables[TAB_SEG].head; curr; curr = curr->next ) {
#if COMDATSUPP
if ( curr->e.seginfo->comdat_selection )
continue;
#endif
omf_InitRec( &obj, CMD_SEGDEF );
if ( curr->e.seginfo->Ofssize > USE16 ) {
obj.is_32 = ( ( curr->e.seginfo->force32 || ( curr->sym.max_offset >= 0x10000 ) ) ? 1 : 0 );
} else {
obj.is_32 = 0;
}
obj.d.segdef.idx = curr->e.seginfo->seg_idx;
obj.d.segdef.use_32 = ( curr->e.seginfo->Ofssize > USE16 ? 1 : 0 );
obj.d.segdef.align = get_omfalign( curr->e.seginfo->alignment );
obj.d.segdef.combine = curr->e.seginfo->combine;
obj.d.segdef.abs.frame = curr->e.seginfo->abs_frame;
obj.d.segdef.abs.offset = curr->e.seginfo->abs_offset;
obj.d.segdef.seg_length = curr->sym.max_offset;
obj.d.segdef.seg_lname_idx = curr->e.seginfo->lname_idx;
obj.d.segdef.class_lname_idx = ( curr->e.seginfo->clsym ? curr->e.seginfo->clsym->class_lname_idx : 1 );
obj.d.segdef.ovl_lname_idx = 1;
omf_write_record( &obj );
DebugMsg1(("omf_write_segdef(%s): len=%" I32_SPEC "X use32=%u align=%u comb=%u seg_lname=%u class_lname=%u ovl_lname=%u\n",
curr->sym.name,
obj.d.segdef.seg_length,
obj.d.segdef.use_32,
obj.d.segdef.align,
obj.d.segdef.combine,
obj.d.segdef.seg_lname_idx,
obj.d.segdef.class_lname_idx,
obj.d.segdef.ovl_lname_idx
));
/* write a comment for the linker.
* this is something not done by Masm, it has
* been inherited from Wasm.
*/
if( curr->e.seginfo->segtype == SEGTYPE_CODE && Options.no_opt_farcall == FALSE ) {
uint_8 buffer[4];
omf_InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = CMT_TNP;
obj.d.coment.cmt_class = CMT_LINKER_DIRECTIVE;
AttachData( &obj, buffer, 3 );
Put8( &obj, LDIR_OPT_FAR_CALLS );
PutIndex( &obj, curr->e.seginfo->seg_idx );
/* v2.04: added. cut off the 3. byte if not needed */
TruncRec( &obj );
omf_write_record( &obj );
}
}
DebugMsg1(("omf_write_segdef exit\n"));
}
/* the lnames are stored in a queue. read
* the items one by one and take care that
* the record size doesn't exceed 1024 bytes.
*/
static void omf_write_lnames( void )
/**********************************/
{
int size;
int items;
unsigned char *p;
//void *pv = NULL;
struct qnode *curr;
struct asym *sym;
struct omf_rec obj;
unsigned char buffer[MAX_LNAME_SIZE];
DebugMsg1(("omf_write_lnames() enter\n"));
p = buffer;
*p++ = NULLC; /* start with the NULL entry */
items = 1;
startitem = 1;
for ( curr = ModuleInfo.g.LnameQueue.head; ; curr = curr->next ) {
//sym = GetLnameData( &pv );
sym = ( curr ? (struct asym *)(curr->elmt) : NULL );
size = p - buffer;
/* v2.04: changed extra bytes from 1 to 4 (CMD, RECLEN, CHKSUM) */
//if ( sym == NULL || ( ( size + sym->name_size + 1 ) > MAX_LNAME_SIZE )) {
if ( sym == NULL || ( ( size + sym->name_size + 4 ) > MAX_LNAME_SIZE )) {
if( size ) {
omf_InitRec( &obj, CMD_LNAMES );
/* first_idx and num_names are NOT
* written to the LNAMES record!
* In fact, they aren't used at all.
*/
obj.d.lnames.first_idx = startitem;
obj.d.lnames.num_names = items;
AttachData( &obj, buffer, size );
omf_write_record( &obj );
startitem = items;
}
if ( sym == NULL )
break;
p = buffer;
}
*p++ = (char)sym->name_size;
/* copy 1 byte more - the NULLC - for _strupr() */
memcpy( p, sym->name, sym->name_size + 1 );
/* lnames are converted for casemaps ALL and NOTPUBLIC */
if ( ModuleInfo.case_sensitive == FALSE )
_strupr( p );
DebugMsg1(("omf_write_lnames: %u=%s\n", items, p ));
p += sym->name_size; /* overwrite the null char */
items++;
/* v2.12: lname_idx fields now set in OMF only */
switch ( sym->state ) {
case SYM_SEG: ((struct dsym *)sym)->e.seginfo->lname_idx = items; break;
case SYM_GRP: ((struct dsym *)sym)->e.grpinfo->lname_idx = items; break;
default: sym->class_lname_idx = items; break;
}
};
DebugMsg1(("omf_write_lnames() exit, items=%u\n", items ));
}
struct readext {
struct dsym *p;
uint_16 index;
uint_8 method;
};
/* read items for EXTDEF records.
* there are 2 sources:
* - the AltQueue of weak externals
* - the TAB_EXT queue of externals
* v2.09: index (ext_idx1, ext_idx2 ) is now set inside this function.
*/
static struct asym *GetExt( struct readext *r )
/*********************************************/
{
struct asym *sym;
if ( r->method == 0 ) {
for ( ; r->p; ) {