aboutsummaryrefslogtreecommitdiffstats
path: root/extra/gdb/50_all_gdb-pie-1.patch
blob: a20771f6898e4817026013612029e11889c172b4 (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
2007-11-02  Jan Kratochvil  <jan.kratochvil@redhat.com>

	Port to GDB-6.7.1.

2007-11-02  Jan Kratochvil  <jan.kratochvil@redhat.com>

	Port to post-GDB-6.7.1 multi-PC breakpoints.

2007-11-09  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* solib-svr4.c (svr4_current_sos): Fix segfault on NULL EXEC_BFD.

2008-02-24  Jan Kratochvil  <jan.kratochvil@redhat.com>

	Port to GDB-6.8pre.

2008-02-27  Jan Kratochvil  <jan.kratochvil@redhat.com>

	Port to gdb-6.7.50.20080227.

Index: gdb/dwarf2read.c
===================================================================
--- a/gdb/dwarf2read.c	2008-02-27 08:57:20.000000000 +0100
+++ b/gdb/dwarf2read.c	2008-02-27 08:57:31.000000000 +0100
@@ -1217,7 +1217,7 @@ dwarf2_build_psymtabs (struct objfile *o
   else
     dwarf2_per_objfile->loc_buffer = NULL;
 
-  if (mainline
+  if ((mainline == 1)
       || (objfile->global_psymbols.size == 0
 	  && objfile->static_psymbols.size == 0))
     {
Index: gdb/auxv.c
===================================================================
--- a/gdb/auxv.c	2008-01-16 17:27:37.000000000 +0100
+++ b/gdb/auxv.c	2008-02-27 08:57:31.000000000 +0100
@@ -80,7 +80,7 @@ procfs_xfer_auxv (struct target_ops *ops
    Return 1 if an entry was read into *TYPEP and *VALP.  */
 int
 target_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
-		   gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
+		   gdb_byte *endptr, ULONGEST *typep, CORE_ADDR *valp)
 {
   const int sizeof_auxv_field = TYPE_LENGTH (builtin_type_void_data_ptr);
   gdb_byte *ptr = *readptr;
@@ -105,9 +105,10 @@ target_auxv_parse (struct target_ops *op
    an error getting the information.  On success, return 1 after
    storing the entry's value field in *VALP.  */
 int
-target_auxv_search (struct target_ops *ops, CORE_ADDR match, CORE_ADDR *valp)
+target_auxv_search (struct target_ops *ops, ULONGEST match, CORE_ADDR *valp)
 {
-  CORE_ADDR type, val;
+  CORE_ADDR val;
+  ULONGEST at_type;
   gdb_byte *data;
   LONGEST n = target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL, &data);
   gdb_byte *ptr = data;
@@ -117,10 +118,10 @@ target_auxv_search (struct target_ops *o
     return n;
 
   while (1)
-    switch (target_auxv_parse (ops, &ptr, data + n, &type, &val))
+    switch (target_auxv_parse (ops, &ptr, data + n, &at_type, &val))
       {
       case 1:			/* Here's an entry, check it.  */
-	if (type == match)
+	if (at_type == match)
 	  {
 	    xfree (data);
 	    *valp = val;
@@ -143,7 +144,8 @@ target_auxv_search (struct target_ops *o
 int
 fprint_target_auxv (struct ui_file *file, struct target_ops *ops)
 {
-  CORE_ADDR type, val;
+  CORE_ADDR val;
+  ULONGEST at_type;
   gdb_byte *data;
   LONGEST len = target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL,
 				   &data);
@@ -153,14 +155,14 @@ fprint_target_auxv (struct ui_file *file
   if (len <= 0)
     return len;
 
-  while (target_auxv_parse (ops, &ptr, data + len, &type, &val) > 0)
+  while (target_auxv_parse (ops, &ptr, data + len, &at_type, &val) > 0)
     {
       extern int addressprint;
       const char *name = "???";
       const char *description = "";
       enum { dec, hex, str } flavor = hex;
 
-      switch (type)
+      switch (at_type)
 	{
 #define TAG(tag, text, kind) \
 	case tag: name = #tag; description = text; flavor = kind; break
@@ -213,7 +215,7 @@ fprint_target_auxv (struct ui_file *file
 	}
 
       fprintf_filtered (file, "%-4s %-20s %-30s ",
-			paddr_d (type), name, description);
+			paddr_d (at_type), name, description);
       switch (flavor)
 	{
 	case dec:
Index: gdb/auxv.h
===================================================================
--- a/gdb/auxv.h	2008-01-01 23:53:09.000000000 +0100
+++ b/gdb/auxv.h	2008-02-27 08:57:31.000000000 +0100
@@ -35,14 +35,14 @@ struct target_ops;		/* Forward declarati
    Return 1 if an entry was read into *TYPEP and *VALP.  */
 extern int target_auxv_parse (struct target_ops *ops,
 			      gdb_byte **readptr, gdb_byte *endptr,
-			      CORE_ADDR *typep, CORE_ADDR *valp);
+			      ULONGEST *typep, CORE_ADDR *valp);
 
 /* Extract the auxiliary vector entry with a_type matching MATCH.
    Return zero if no such entry was found, or -1 if there was
    an error getting the information.  On success, return 1 after
    storing the entry's value field in *VALP.  */
 extern int target_auxv_search (struct target_ops *ops,
-			       CORE_ADDR match, CORE_ADDR *valp);
+			       ULONGEST match, CORE_ADDR *valp);
 
 /* Print the contents of the target's AUXV on the specified file. */
 extern int fprint_target_auxv (struct ui_file *file, struct target_ops *ops);
Index: gdb/breakpoint.h
===================================================================
--- a/gdb/breakpoint.h	2008-02-01 17:24:46.000000000 +0100
+++ b/gdb/breakpoint.h	2008-02-27 08:57:31.000000000 +0100
@@ -144,6 +144,7 @@ enum enable_state
 			   automatically enabled and reset when the call 
 			   "lands" (either completes, or stops at another 
 			   eventpoint). */
+    bp_startup_disabled,
     bp_permanent	/* There is a breakpoint instruction hard-wired into
 			   the target's code.  Don't try to write another
 			   breakpoint instruction on top of it, or restore
@@ -823,6 +824,10 @@ extern void remove_thread_event_breakpoi
 
 extern void disable_breakpoints_in_shlibs (void);
 
+extern void disable_breakpoints_at_startup (int silent);
+
+extern void re_enable_breakpoints_at_startup (void);
+
 /* This function returns TRUE if ep is a catchpoint. */
 extern int ep_is_catchpoint (struct breakpoint *);
 
Index: gdb/symfile-mem.c
===================================================================
--- a/gdb/symfile-mem.c	2008-01-01 23:53:13.000000000 +0100
+++ b/gdb/symfile-mem.c	2008-02-27 08:57:31.000000000 +0100
@@ -108,7 +108,7 @@ symbol_file_add_from_memory (struct bfd 
       }
 
   objf = symbol_file_add_from_bfd (nbfd, from_tty,
-                                   sai, 0, OBJF_SHARED);
+                                   sai, 2, OBJF_SHARED);
 
   /* This might change our ideas about frames already looked at.  */
   reinit_frame_cache ();
Index: gdb/infrun.c
===================================================================
--- a/gdb/infrun.c	2008-02-27 08:57:20.000000000 +0100
+++ b/gdb/infrun.c	2008-02-27 08:57:31.000000000 +0100
@@ -2277,6 +2277,11 @@ process_event_stop_test:
 #endif
 	  target_terminal_inferior ();
 
+	  /* For PIE executables, we dont really know where the
+	     breakpoints are going to be until we start up the
+	     inferior.  */
+          re_enable_breakpoints_at_startup ();
+
 	  /* If requested, stop when the dynamic linker notifies
 	     gdb of events.  This allows the user to get control
 	     and place breakpoints in initializer routines for
Index: gdb/objfiles.c
===================================================================
--- a/gdb/objfiles.c	2008-01-01 23:53:12.000000000 +0100
+++ b/gdb/objfiles.c	2008-02-27 08:57:31.000000000 +0100
@@ -49,6 +49,9 @@
 #include "source.h"
 #include "addrmap.h"
 
+#include "auxv.h"
+#include "elf/common.h"
+
 /* Prototypes for local functions */
 
 static void objfile_alloc_data (struct objfile *objfile);
@@ -260,7 +263,19 @@ init_entry_point_info (struct objfile *o
 CORE_ADDR
 entry_point_address (void)
 {
-  return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
+  int ret;
+  CORE_ADDR entry_addr;
+
+  /* Find the address of the entry point of the program from the
+     auxv vector.  */
+  ret = target_auxv_search (&current_target, AT_ENTRY, &entry_addr);
+  if (ret == 1)
+     return entry_addr;                                                                              
+  /*if (ret == 0 || ret == -1)*/
+  else
+    {
+      return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
+    }
 }
 
 /* Create the terminating entry of OBJFILE's minimal symbol table.
Index: gdb/solib-svr4.c
===================================================================
--- a/gdb/solib-svr4.c	2008-02-27 08:57:19.000000000 +0100
+++ b/gdb/solib-svr4.c	2008-02-27 08:59:06.000000000 +0100
@@ -31,6 +31,8 @@
 #include "gdbcore.h"
 #include "target.h"
 #include "inferior.h"
+#include "auxv.h"
+#include "command.h"
 
 #include "gdb_assert.h"
 
@@ -246,7 +248,9 @@ static char *debug_loader_name;
 
 /* Local function prototypes */
 
+#if 0
 static int match_main (char *);
+#endif
 
 static CORE_ADDR bfd_lookup_symbol (bfd *, char *);
 
@@ -349,10 +353,12 @@ scan_dyntag (int dyntag, bfd *abfd, CORE
   int arch_size, step, sect_size;
   long dyn_tag;
   CORE_ADDR dyn_ptr, dyn_addr;
+  CORE_ADDR entry_addr;
   gdb_byte *bufend, *bufstart, *buf;
   Elf32_External_Dyn *x_dynp_32;
   Elf64_External_Dyn *x_dynp_64;
   struct bfd_section *sect;
+  int ret;
 
   if (abfd == NULL)
     return 0;
@@ -360,19 +366,74 @@ scan_dyntag (int dyntag, bfd *abfd, CORE
   if (arch_size == -1)
    return 0;
 
+  /* The auxv vector based relocatable files reading is limited to the main
+     executable.  */
+  gdb_assert (abfd == exec_bfd || ptr == NULL);
+
+  if (ptr != NULL)
+    {
+      /* Find the address of the entry point of the program from the
+	 auxv vector.  */
+      ret = target_auxv_search (&current_target, AT_ENTRY, &entry_addr);
+
+      if (ret == 0 || ret == -1)
+	{
+	  /* No auxv info, maybe an older kernel. Fake our way through.  */
+	  entry_addr = bfd_get_start_address (exec_bfd); 
+
+	  if (debug_solib)
+	    fprintf_unfiltered (gdb_stdlog,
+				"elf_locate_base: program entry address not found. Using bfd's 0x%s for %s\n",
+				paddr_nz (entry_addr), exec_bfd->filename);
+	}
+      else
+	{
+	  if (debug_solib)
+	    fprintf_unfiltered (gdb_stdlog,
+				"elf_locate_base: found program entry address 0x%s for %s\n",
+				paddr_nz (entry_addr), exec_bfd->filename);
+	}
+    }
+
   /* Find the start address of the .dynamic section.  */
   sect = bfd_get_section_by_name (abfd, ".dynamic");
   if (sect == NULL)
-    return 0;
+    { 
+      if (debug_solib)
+	fprintf_unfiltered (gdb_stdlog,
+			    "elf_locate_base: .dynamic section not found in %s -- return now\n",
+			    exec_bfd->filename);
+      return 0;
+    }
+  else
+    { 
+      if (debug_solib)
+	fprintf_unfiltered (gdb_stdlog,
+			    "elf_locate_base: .dynamic section found in %s\n",
+			    exec_bfd->filename);
+    }
+
   dyn_addr = bfd_section_vma (abfd, sect);
+  if (debug_solib)
+    fprintf_unfiltered (gdb_stdlog,
+			"elf_locate_base: .dynamic addr 0x%s\n",
+			paddr_nz (dyn_addr));
 
   /* Read in .dynamic from the BFD.  We will get the actual value
      from memory later.  */
   sect_size = bfd_section_size (abfd, sect);
   buf = bufstart = alloca (sect_size);
+  if (debug_solib) 
+    fprintf_unfiltered (gdb_stdlog, 
+                        "elf_locate_base: read in .dynamic section\n");
   if (!bfd_get_section_contents (abfd, sect,
 				 buf, 0, sect_size))
-    return 0;
+    { 
+      if (debug_solib)
+	fprintf_unfiltered (gdb_stdlog,
+			    "elf_locate_base: couldn't read .dynamic section -- return now\n");
+      return 0;
+    }
 
   /* Iterate over BUF and scan for DYNTAG.  If found, set PTR and return.  */
   step = (arch_size == 32) ? sizeof (Elf32_External_Dyn)
@@ -405,9 +466,43 @@ scan_dyntag (int dyntag, bfd *abfd, CORE
 	     CORE_ADDR ptr_addr;
 
 	     ptr_addr = dyn_addr + (buf - bufstart) + arch_size / 8;
+	     if (ptr != NULL)
+	       {
+		 if (debug_solib)
+		   fprintf_unfiltered (gdb_stdlog,
+				       "elf_locate_base: unrelocated ptr addr 0x%s\n",
+				       paddr_nz (ptr_addr));
+		 ptr_addr += entry_addr - bfd_get_start_address (exec_bfd);
+		 if (debug_solib) 
+		   fprintf_unfiltered (gdb_stdlog, 
+				       "elf_locate_base: relocated ptr addr 0x%s"
+				       " (auxv entry 0x%s, bfd start address 0x%s)"
+				       " for %s\n",
+				       paddr_nz (ptr_addr), paddr_nz (entry_addr),
+				       paddr_nz (bfd_get_start_address (exec_bfd)),
+				       exec_bfd->filename);
+	       }
 	     if (target_read_memory (ptr_addr, ptr_buf, arch_size / 8) == 0)
-	       dyn_ptr = extract_typed_address (ptr_buf,
-						builtin_type_void_data_ptr);
+	       {
+		 dyn_ptr = extract_typed_address (ptr_buf,
+						  builtin_type_void_data_ptr);
+		 if (ptr != NULL)
+		   {
+		     if (debug_solib)
+		       fprintf_unfiltered (gdb_stdlog,
+					   "elf_locate_base: Tag entry has value 0x%s -- return now\n",
+					   paddr_nz (dyn_ptr));
+		   }
+	       }
+	     else
+	       {
+		 if (ptr != NULL)
+		   {
+		     if (debug_solib)
+		       fprintf_unfiltered (gdb_stdlog,
+					   "elf_locate_base: Couldn't read tag entry value -- return now\n");
+		   }
+	       }
 	     *ptr = dyn_ptr;
 	   }
 	 return 1;
@@ -544,6 +639,10 @@ solib_svr4_r_map (void)
 {
   struct link_map_offsets *lmo = svr4_fetch_link_map_offsets ();
 
+  if (debug_solib)
+    fprintf_unfiltered (gdb_stdlog, 
+                        "solib_svr4_r_map: read at 0x%s\n",
+                        paddr_nz (debug_base + lmo->r_map_offset));
   return read_memory_typed_address (debug_base + lmo->r_map_offset,
 				    builtin_type_void_data_ptr);
 }
@@ -713,6 +812,11 @@ svr4_current_sos (void)
   struct so_list *head = 0;
   struct so_list **link_ptr = &head;
   CORE_ADDR ldsomap = 0;
+  const char *filename = exec_bfd ? exec_bfd->filename : "<none>";
+
+  if (debug_solib)
+    fprintf_unfiltered (gdb_stdlog, 
+                        "svr4_current_sos: exec_bfd %s\n", filename);
 
   /* Always locate the debug struct, in case it has moved.  */
   debug_base = 0;
@@ -721,10 +825,19 @@ svr4_current_sos (void)
   /* If we can't find the dynamic linker's base structure, this
      must not be a dynamically linked executable.  Hmm.  */
   if (! debug_base)
-    return svr4_default_sos ();
+    {
+      if (debug_solib)
+	fprintf_unfiltered (gdb_stdlog, 
+			    "svr4_current_sos: no DT_DEBUG found in %s -- return now\n",
+			    filename);
+      return svr4_default_sos ();
+    }
 
   /* Walk the inferior's link map list, and build our list of
      `struct so_list' nodes.  */
+  if (debug_solib)
+    fprintf_unfiltered (gdb_stdlog, 
+			"svr4_current_sos: walk link map in %s\n", filename);
   lm = solib_svr4_r_map ();
 
   while (lm)
@@ -740,23 +853,103 @@ svr4_current_sos (void)
       new->lm_info->lm = xzalloc (lmo->link_map_size);
       make_cleanup (xfree, new->lm_info->lm);
 
+      if (debug_solib)
+        fprintf_unfiltered (gdb_stdlog, 
+                            "svr4_current_sos: read lm at 0x%s\n", paddr_nz(lm));
       read_memory (lm, new->lm_info->lm, lmo->link_map_size);
 
       lm = LM_NEXT (new);
 
+      if (debug_solib)
+        fprintf_unfiltered (gdb_stdlog,
+                            "svr4_current_sos: is first link entry? %d\n",
+                            IGNORE_FIRST_LINK_MAP_ENTRY (new));
+
       /* For SVR4 versions, the first entry in the link map is for the
          inferior executable, so we must ignore it.  For some versions of
          SVR4, it has no name.  For others (Solaris 2.3 for example), it
          does have a name, so we can no longer use a missing name to
          decide when to ignore it. */
-      if (IGNORE_FIRST_LINK_MAP_ENTRY (new) && ldsomap == 0)
-	free_so (new);
+      if (exec_bfd != NULL && IGNORE_FIRST_LINK_MAP_ENTRY (new) && ldsomap == 0)
+	{
+          /* It is the first link map entry, i.e. it is the main executable.  */
+
+	  if (bfd_get_start_address (exec_bfd) == entry_point_address ())
+	    {
+              /* Non-pie case, main executable has not been relocated.  */
+	      free_so (new);
+	    }
+	  else
+	    {
+              /* Pie case, main executable has been relocated.  */
+	      struct so_list *gdb_solib;
+
+	      if (debug_solib)
+		fprintf_unfiltered (gdb_stdlog,
+				    "svr4_current_sos: Processing first link map entry\n");
+	      strncpy (new->so_name, exec_bfd->filename,
+		       SO_NAME_MAX_PATH_SIZE - 1);
+	      new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
+	      strcpy (new->so_original_name, new->so_name);
+	      /*new->main = 1;*/
+	      new->main_relocated = 0;
+            
+	      if (debug_solib)
+		{ 
+		  fprintf_unfiltered (gdb_stdlog,
+				      "svr4_current_sos: Processing nameless DSO\n");
+		  fprintf_unfiltered (gdb_stdlog,
+				      "svr4_current_sos: adding name %s\n",
+				      new->so_name);
+		}
+
+	      for (gdb_solib = master_so_list ();
+                   gdb_solib;
+                   gdb_solib = gdb_solib->next)
+		{
+		  if (debug_solib)
+		    fprintf_unfiltered (gdb_stdlog,
+					"svr4_current_sos: compare gdb %s and new %s\n",
+					gdb_solib->so_name, new->so_name);
+		  if (strcmp (gdb_solib->so_name, new->so_name) == 0)
+		    if (gdb_solib->main_relocated)
+		      { 
+			if (debug_solib)
+			  fprintf_unfiltered (gdb_stdlog,
+					      "svr4_current_sos: found main relocated\n");
+			break;
+		      }
+		}
+
+	      if ((gdb_solib && !gdb_solib->main_relocated) || (!gdb_solib))
+		{
+		  add_to_target_sections (0 /*from_tty*/, &current_target, new);
+		  new->main = 1;
+		}
+
+	      /* We need this in the list of shared libs we return because
+		 solib_add_stub will loop through it and add the symbol file.  */
+	      new->next = 0;
+	      *link_ptr = new;
+	      link_ptr = &new->next; 
+	    }
+	} /* End of IGNORE_FIRST_LINK_MAP_ENTRY  */
       else
 	{
+          /* This is not the first link map entry, i.e. is not the main
+             executable.  Note however that it could be the DSO supplied on
+             certain systems (i.e. Linux 2.6) containing information about
+             the vsyscall page.  We must ignore such entry. This entry is 
+             nameless (just like the one for the main executable, sigh).  */
+
 	  int errcode;
 	  char *buffer;
 
 	  /* Extract this shared object's name.  */
+	  if (debug_solib)
+	    fprintf_unfiltered (gdb_stdlog, 
+                                "svr4_current_sos: read LM_NAME\n");
+
 	  target_read_string (LM_NAME (new), &buffer,
 			      SO_NAME_MAX_PATH_SIZE - 1, &errcode);
 	  if (errcode != 0)
@@ -764,23 +957,35 @@ svr4_current_sos (void)
 		     safe_strerror (errcode));
 	  else
 	    {
-	      strncpy (new->so_name, buffer, SO_NAME_MAX_PATH_SIZE - 1);
-	      new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
-	      strcpy (new->so_original_name, new->so_name);
-	    }
-	  xfree (buffer);
-
-	  /* If this entry has no name, or its name matches the name
-	     for the main executable, don't include it in the list.  */
-	  if (! new->so_name[0]
-	      || match_main (new->so_name))
-	    free_so (new);
-	  else
-	    {
-	      new->next = 0;
-	      *link_ptr = new;
-	      link_ptr = &new->next;
+	      if (debug_solib)
+		fprintf_unfiltered (gdb_stdlog, 
+				    "svr4_current_sos: LM_NAME is <%s>\n",
+				    buffer);
+	      /* The name could be empty, in which case it is the
+		 system supplied DSO.  */
+	      if (strcmp (buffer, "") == 0)
+		free_so (new);
+	      else
+		{
+		  strncpy (new->so_name, buffer, SO_NAME_MAX_PATH_SIZE - 1);
+		  new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
+		  strcpy (new->so_original_name, new->so_name);
+		  if (debug_solib)
+		    {
+		      fprintf_unfiltered (gdb_stdlog, 
+					  "svr4_current_sos: Processing DSO: %s\n",
+					  new->so_name);
+		      fprintf_unfiltered (gdb_stdlog,
+					  "svr4_current_sos: first link entry %d\n",
+					  IGNORE_FIRST_LINK_MAP_ENTRY (new));
+		    }
+
+		  new->next = 0;
+		  *link_ptr = new;
+		  link_ptr = &new->next;
+		}
 	    }
+          xfree (buffer);
 	}
 
       /* On Solaris, the dynamic linker is not in the normal list of
@@ -796,6 +1001,9 @@ svr4_current_sos (void)
   if (head == NULL)
     return svr4_default_sos ();
 
+  if (debug_solib)
+    fprintf_unfiltered (gdb_stdlog, "svr4_current_sos: ENDS %s\n", filename);
+
   return head;
 }
 
@@ -875,7 +1083,7 @@ svr4_fetch_objfile_link_map (struct objf
 /* On some systems, the only way to recognize the link map entry for
    the main executable file is by looking at its name.  Return
    non-zero iff SONAME matches one of the known main executable names.  */
-
+#if 0
 static int
 match_main (char *soname)
 {
@@ -889,6 +1097,7 @@ match_main (char *soname)
 
   return (0);
 }
+#endif
 
 /* Return 1 if PC lies in the dynamic symbol resolution code of the
    SVR4 run time loader.  */
@@ -1040,6 +1249,11 @@ enable_break (void)
   /* Find the .interp section; if not found, warn the user and drop
      into the old breakpoint at symbol code.  */
   interp_sect = bfd_get_section_by_name (exec_bfd, ".interp");
+
+  if (debug_solib)
+     fprintf_unfiltered (gdb_stdlog,
+                         "enable_break: search for .interp in %s\n",
+                         exec_bfd->filename);
   if (interp_sect)
     {
       unsigned int interp_sect_size;
@@ -1074,6 +1288,9 @@ enable_break (void)
       if (tmp_fd >= 0)
 	tmp_bfd = bfd_fopen (tmp_pathname, gnutarget, FOPEN_RB, tmp_fd);
 
+      if (debug_solib)
+         fprintf_unfiltered (gdb_stdlog,
+                            "enable_break: opening %s\n", tmp_pathname);
       if (tmp_bfd == NULL)
 	goto bkpt_at_symbol;
 
@@ -1180,6 +1397,9 @@ enable_break (void)
       if (sym_addr != 0)
 	{
 	  create_solib_event_breakpoint (load_addr + sym_addr);
+          if (debug_solib)
+            fprintf_unfiltered (gdb_stdlog,
+                               "enable_break: solib bp set\n");
 	  return 1;
 	}
 
@@ -1440,6 +1660,8 @@ svr4_solib_create_inferior_hook (void)
   while (stop_signal != TARGET_SIGNAL_TRAP);
   stop_soon = NO_STOP_QUIETLY;
 #endif /* defined(_SCO_DS) */
+ 
+   disable_breakpoints_at_startup (1); 
 }
 
 static void
@@ -1620,6 +1842,75 @@ svr4_lp64_fetch_link_map_offsets (void)
 
   return lmp;
 }
+void
+info_linkmap_command (char *cmd, int from_tty)
+{
+  CORE_ADDR lm;
+                                                                                
+  /* Make sure we've looked up the inferior's dynamic linker's base
+     structure.  */
+  if (! debug_base)
+    {
+      debug_base = locate_base ();
+                                                                                
+      /* If we can't find the dynamic linker's base structure, this
+         must not be a dynamically linked executable.  Hmm.  */
+      if (! debug_base)
+        {
+          if (debug_solib)
+            fprintf_unfiltered (gdb_stdlog,
+                                "svr4_print_linkmap: no DT_DEBUG found in %s -- return now\n",
+                                exec_bfd->filename);
+          return;
+        }
+    }
+                                                                                
+  /* Walk the inferior's link map list, and print the info.  */
+ 
+  lm = solib_svr4_r_map ();
+  while (lm)
+    {
+      int errcode;
+      char *buffer;
+      CORE_ADDR load_addr;
+
+      struct link_map_offsets *lmo = svr4_fetch_link_map_offsets ();
+      struct so_list *new
+        = (struct so_list *) xmalloc (sizeof (struct so_list));
+      struct cleanup *old_chain = make_cleanup (xfree, new);
+
+      memset (new, 0, sizeof (*new));
+
+      new->lm_info = xmalloc (sizeof (struct lm_info));
+      make_cleanup (xfree, new->lm_info);
+
+      new->lm_info->lm = xmalloc (lmo->link_map_size);
+      make_cleanup (xfree, new->lm_info->lm);
+      memset (new->lm_info->lm, 0, lmo->link_map_size);
+
+      if (debug_solib)
+        fprintf_unfiltered (gdb_stdlog,
+                            "svr4_print_linkmap: read lm at 0x%s\n", paddr_nz(lm));
+      read_memory (lm, new->lm_info->lm, lmo->link_map_size);
+
+      lm = LM_NEXT (new);
+
+      /* Load address.  */
+      load_addr = LM_ADDR_CHECK (new, NULL);
+      /* Shared object's name.  */
+      target_read_string (LM_NAME (new), &buffer,
+			  SO_NAME_MAX_PATH_SIZE - 1, &errcode);
+      make_cleanup (xfree, buffer);
+      if (errcode != 0)
+	{
+	  warning ("svr4_print_linkmap: Can't read pathname for load map: %s\n",
+		   safe_strerror (errcode));
+	}
+      fprintf_filtered (gdb_stdout, "%-8s %-30s\n", paddr(load_addr), buffer);
+      do_cleanups (old_chain);
+    }
+}                                                                                
+
 
 
 struct target_so_ops svr4_so_ops;
@@ -1678,4 +1969,7 @@ _initialize_svr4_solib (void)
   svr4_so_ops.in_dynsym_resolve_code = svr4_in_dynsym_resolve_code;
   svr4_so_ops.lookup_lib_global_symbol = elf_lookup_lib_symbol;
   svr4_so_ops.same = svr4_same;
+
+  add_info ("linkmap", info_linkmap_command,
+	    "Display the inferior's linkmap.");
 }
Index: gdb/varobj.c
===================================================================
--- a/gdb/varobj.c	2008-02-04 08:49:04.000000000 +0100
+++ b/gdb/varobj.c	2008-02-27 08:57:31.000000000 +0100
@@ -1078,6 +1078,62 @@ install_new_value (struct varobj *var, s
   return changed;
 }
 
+void
+varobj_refresh (void)
+{
+  struct varobj *var;
+  struct varobj_root *croot;
+  int mycount = rootcount;
+  char * name;
+
+  croot = rootlist;
+  while ((croot != NULL) && (mycount > 0))
+    {
+      var = croot->rootvar;
+
+      /* Get rid of the memory for the old expression.  This also
+         leaves var->root->exp == NULL, which is ok for the parsing
+         below.  */
+      free_current_contents (&var->root->exp);
+
+      value_free (var->value);
+      var->type = NULL;
+
+      name = xstrdup (var->name);
+
+      /* Reparse the expression.  Wrap the call to parse expression,
+         so we can return a sensible error. */
+      if (!gdb_parse_exp_1 (&name, var->root->valid_block, 0, &var->root->exp))
+        {
+          return;
+        }
+
+      /* We definitively need to catch errors here.
+         If evaluate_expression succeeds we got the value we wanted.
+         But if it fails, we still go on with a call to evaluate_type()  */
+      if (gdb_evaluate_expression (var->root->exp, &var->value))
+        {
+          /* no error */
+          release_value (var->value);
+          if (value_lazy (var->value))
+            gdb_value_fetch_lazy (var->value);
+        }
+      else
+        var->value = evaluate_type (var->root->exp);
+
+      var->type = value_type (var->value);
+
+      mycount--;
+      croot = croot->next;
+    }
+
+  if (mycount || (croot != NULL))
+    warning
+      ("varobj_refresh: assertion failed - wrong tally of root vars (%d:%d)",
+       rootcount, mycount);
+}
+
+
 /* Update the values for a variable and its children.  This is a
    two-pronged attack.  First, re-parse the value for the root's
    expression to see if it's changed.  Then go all the way
Index: gdb/solist.h
===================================================================
--- a/gdb/solist.h	2008-01-07 16:19:58.000000000 +0100
+++ b/gdb/solist.h	2008-02-27 08:57:31.000000000 +0100
@@ -61,6 +61,8 @@ struct so_list
     bfd *abfd;
     char symbols_loaded;	/* flag: symbols read in yet? */
     char from_tty;		/* flag: print msgs? */
+    char main;                  /* flag: is this the main executable? */
+    char main_relocated;        /* flag: has it been relocated yet? */
     struct objfile *objfile;	/* objfile for loaded lib */
     struct section_table *sections;
     struct section_table *sections_end;
@@ -127,9 +129,15 @@ void free_so (struct so_list *so);
 /* Return address of first so_list entry in master shared object list.  */
 struct so_list *master_so_list (void);
 
+/* Return address of first so_list entry in master shared object list.  */
+struct so_list *master_so_list (void);
+
 /* Find solib binary file and open it.  */
 extern int solib_open (char *in_pathname, char **found_pathname);
 
+/* Add the list of sections in so_list to the target to_sections.  */
+extern void add_to_target_sections (int, struct target_ops *, struct so_list *);
+
 /* FIXME: gdbarch needs to control this variable */
 extern struct target_so_ops *current_target_so_ops;
 
@@ -140,4 +148,6 @@ struct symbol *solib_global_lookup (cons
 				    const domain_enum domain,
 				    struct symtab **symtab);
 
+/* Controls the printing of debugging output.  */
+extern int debug_solib;
 #endif
Index: gdb/varobj.h
===================================================================
--- a/gdb/varobj.h	2008-01-30 08:17:31.000000000 +0100
+++ b/gdb/varobj.h	2008-02-27 08:57:31.000000000 +0100
@@ -122,4 +122,6 @@ extern void varobj_invalidate (void);
 
 extern int varobj_editable_p (struct varobj *var);
 
+extern void varobj_refresh(void);
+
 #endif /* VAROBJ_H */
Index: gdb/symfile.c
===================================================================
--- a/gdb/symfile.c	2008-01-29 23:47:20.000000000 +0100
+++ b/gdb/symfile.c	2008-02-27 08:57:31.000000000 +0100
@@ -47,6 +47,7 @@
 #include "readline/readline.h"
 #include "gdb_assert.h"
 #include "block.h"
+#include "varobj.h"
 #include "observer.h"
 #include "exec.h"
 #include "parser-defs.h"
@@ -778,7 +779,7 @@ syms_from_objfile (struct objfile *objfi
 
   /* Now either addrs or offsets is non-zero.  */
 
-  if (mainline)
+  if (mainline == 1)
     {
       /* We will modify the main symbol table, make sure that all its users
          will be cleaned up if an error occurs during symbol reading.  */
@@ -806,7 +807,7 @@ syms_from_objfile (struct objfile *objfi
 
      We no longer warn if the lowest section is not a text segment (as
      happens for the PA64 port.  */
-  if (!mainline && addrs && addrs->other[0].name)
+  if (/*!mainline &&*/ addrs && addrs->other[0].name)
     {
       asection *lower_sect;
       asection *sect;
@@ -975,17 +976,21 @@ new_symfile_objfile (struct objfile *obj
   /* If this is the main symbol file we have to clean up all users of the
      old main symbol file. Otherwise it is sufficient to fixup all the
      breakpoints that may have been redefined by this symbol file.  */
-  if (mainline)
+  if (mainline == 1)
     {
       /* OK, make it the "real" symbol file.  */
       symfile_objfile = objfile;
 
       clear_symtab_users ();
     }
-  else
+  else if (mainline == 0)
     {
       breakpoint_re_set ();
     }
+  else
+    {
+      /* Don't reset breakpoints or it will screw up PIE.  */
+    }
 
   /* We're done reading the symbol file; finish off complaints.  */
   clear_complaints (&symfile_complaints, 0, verbo);
@@ -1028,7 +1033,7 @@ symbol_file_add_with_addrs_or_offsets (b
      interactively wiping out any existing symbols.  */
 
   if ((have_full_symbols () || have_partial_symbols ())
-      && mainline
+      && (mainline == 1)
       && from_tty
       && !query ("Load new symbol table from \"%s\"? ", name))
     error (_("Not confirmed."));
@@ -1212,6 +1217,10 @@ symbol_file_clear (int from_tty)
 		    symfile_objfile->name)
 	  : !query (_("Discard symbol table? "))))
     error (_("Not confirmed."));
+#ifdef CLEAR_SOLIB
+      CLEAR_SOLIB ();
+#endif
+
     free_all_objfiles ();
 
     /* solib descriptors may have handles to objfiles.  Since their
@@ -2466,6 +2475,8 @@ reread_symbols (void)
 	      /* Discard cleanups as symbol reading was successful.  */
 	      discard_cleanups (old_cleanups);
 
+	      init_entry_point_info (objfile);
+
 	      /* If the mtime has changed between the time we set new_modtime
 	         and now, we *want* this to be out of date, so don't call stat
 	         again now.  */
@@ -2834,6 +2845,7 @@ clear_symtab_users (void)
   breakpoint_re_set ();
   set_default_breakpoint (0, 0, 0, 0);
   clear_pc_function_cache ();
+  varobj_refresh ();
   observer_notify_new_objfile (NULL);
 
   /* Clear globals which might have pointed into a removed objfile.
Index: gdb/breakpoint.c
===================================================================
--- a/gdb/breakpoint.c	2008-02-27 08:57:20.000000000 +0100
+++ b/gdb/breakpoint.c	2008-02-27 08:57:31.000000000 +0100
@@ -923,7 +923,7 @@ update_watchpoint (struct breakpoint *b,
       value_release_to_mark (mark);
 
       /* Look at each value on the value chain.  */
-      for (; v; v = next)
+      for (; v; v = value_next (v))
 	{
 	  /* If it's a memory location, and GDB actually needed
 	     its contents to evaluate the expression, then we
@@ -3882,7 +3882,8 @@ describe_other_breakpoints (CORE_ADDR pc
 	      printf_filtered (" (thread %d)", b->thread);
 	    printf_filtered ("%s%s ",
 			     ((b->enable_state == bp_disabled || 
-			       b->enable_state == bp_call_disabled) 
+			       b->enable_state == bp_call_disabled ||
+			       b->enable_state == bp_startup_disabled)
 			      ? " (disabled)"
 			      : b->enable_state == bp_permanent 
 			      ? " (permanent)"
@@ -4534,6 +4535,62 @@ disable_breakpoints_in_unloaded_shlib (s
   }
 }
 
+void
+disable_breakpoints_at_startup (int silent)
+{
+  struct breakpoint *b;
+  int disabled_startup_breaks = 0;
+
+  if (bfd_get_start_address (exec_bfd) != entry_point_address ())
+    {
+      ALL_BREAKPOINTS (b)
+	{
+	  if (((b->type == bp_breakpoint) ||
+	       (b->type == bp_hardware_breakpoint)) &&
+	      b->enable_state == bp_enabled &&
+	      !b->loc->duplicate)
+	    {
+	      b->enable_state = bp_startup_disabled;
+	      if (!silent)
+		{
+		  if (!disabled_startup_breaks)
+		    {
+		      target_terminal_ours_for_output ();
+		      warning ("Temporarily disabling breakpoints:");
+		    }
+		  disabled_startup_breaks = 1;
+		  warning ("breakpoint #%d addr 0x%s", b->number, paddr_nz(b->loc->address));
+		}
+	    }
+	}
+    }
+}
+
+/* Try to reenable any breakpoints after startup.  */
+void
+re_enable_breakpoints_at_startup (void)
+{
+  struct breakpoint *b;
+
+  if (bfd_get_start_address (exec_bfd) != entry_point_address ())
+    {
+      ALL_BREAKPOINTS (b)
+	if (b->enable_state == bp_startup_disabled)
+	  {
+	    char buf[1];
+
+	    /* Do not reenable the breakpoint if the shared library
+	       is still not mapped in.  */
+	    if (target_read_memory (b->loc->address, buf, 1) == 0)
+	      {
+		/*printf ("enabling breakpoint at 0x%s\n", paddr_nz(b->loc->address));*/
+		b->enable_state = bp_enabled;
+	      }
+	  }
+    }
+}
+
+
 static void
 create_fork_vfork_event_catchpoint (int tempflag, char *cond_string,
 				    enum bptype bp_kind)
Index: gdb/solib.c
===================================================================
--- a/gdb/solib.c	2008-01-07 16:19:58.000000000 +0100
+++ b/gdb/solib.c	2008-02-27 08:57:31.000000000 +0100
@@ -79,6 +79,8 @@ set_solib_ops (struct gdbarch *gdbarch, 
 
 /* external data declarations */
 
+int debug_solib;
+
 /* FIXME: gdbarch needs to control this variable, or else every
    configuration needs to call set_solib_ops.  */
 struct target_so_ops *current_target_so_ops;
@@ -102,6 +104,8 @@ The search path for loading non-absolute
 		    value);
 }
 
+void add_to_target_sections (int, struct target_ops *, struct so_list *);
+
 /*
 
    GLOBAL FUNCTION
@@ -391,7 +395,6 @@ free_so (struct so_list *so)
   xfree (so);
 }
 
-
 /* Return address of first so_list entry in master shared object list.  */
 struct so_list *
 master_so_list (void)
@@ -399,7 +402,6 @@ master_so_list (void)
   return so_list_head;
 }
 
-
 /* A small stub to get us past the arg-passing pinhole of catch_errors.  */
 
 static int
@@ -411,15 +413,40 @@ symbol_add_stub (void *arg)
   /* Have we already loaded this shared object?  */
   ALL_OBJFILES (so->objfile)
     {
-      if (strcmp (so->objfile->name, so->so_name) == 0)
+      /* Found an already loaded shared library.  */
+      if (strcmp (so->objfile->name, so->so_name) == 0
+          && !so->main)
 	return 1;
+      /* Found an already loaded main executable.  This could happen in
+         two circumstances. 
+         First case: the main file has already been read in
+         as the first thing that gdb does at startup, and the file
+         hasn't been relocated properly yet. Therefor we need to read
+         it in with the proper section info.
+         Second case: it has been read in with the correct relocation,
+         and therefore we need to skip it.  */
+      if (strcmp (so->objfile->name, so->so_name) == 0 
+          && so->main
+          && so->main_relocated)
+        return 1;
     }
 
   sap = build_section_addr_info_from_section_table (so->sections,
                                                     so->sections_end);
 
-  so->objfile = symbol_file_add (so->so_name, so->from_tty,
-				 sap, 0, OBJF_SHARED);
+  if (so->main)
+    {
+      if (debug_solib)
+        fprintf_unfiltered (gdb_stdlog,
+			    "symbol_add_stub: adding symbols for main\n");
+      so->objfile = symbol_file_add (so->so_name, /*so->from_tty*/ 0,
+   				     sap, 1, 0);
+      so->main_relocated = 1;
+    }
+  else
+    so->objfile = symbol_file_add (so->so_name, so->from_tty,
+				   sap, 0, OBJF_SHARED);
+
   free_section_addr_info (sap);
 
   return (1);
@@ -545,6 +572,10 @@ update_solib_list (int from_tty, struct 
 	    }
 	  else
 	    {
+	      if (debug_solib)
+		fprintf_unfiltered (gdb_stdlog,
+				    "update_solib_list: compare gdb:%s and inferior:%s\n",
+				    gdb->so_original_name, i->so_original_name);
 	      if (! strcmp (gdb->so_original_name, i->so_original_name))
 		break;	      
 	    }
@@ -599,28 +630,7 @@ update_solib_list (int from_tty, struct 
       /* Fill in the rest of each of the `struct so_list' nodes.  */
       for (i = inferior; i; i = i->next)
 	{
-	  i->from_tty = from_tty;
-
-	  /* Fill in the rest of the `struct so_list' node.  */
-	  catch_errors (solib_map_sections, i,
-			"Error while mapping shared library sections:\n",
-			RETURN_MASK_ALL);
-
-	  /* If requested, add the shared object's sections to the TARGET's
-	     section table.  Do this immediately after mapping the object so
-	     that later nodes in the list can query this object, as is needed
-	     in solib-osf.c.  */
-	  if (target)
-	    {
-	      int count = (i->sections_end - i->sections);
-	      if (count > 0)
-		{
-		  int space = target_resize_to_sections (target, count);
-		  memcpy (target->to_sections + space,
-			  i->sections,
-			  count * sizeof (i->sections[0]));
-		}
-	    }
+   	  add_to_target_sections (from_tty, target, i);
 
 	  /* Notify any observer that the shared object has been
              loaded now that we've added it to GDB's tables.  */
@@ -716,6 +726,41 @@ solib_add (char *pattern, int from_tty, 
   }
 }
 
+void
+add_to_target_sections (int from_tty, struct target_ops *target, struct so_list *solib)
+{
+  /* If this is set, then the sections have been already added to the
+     target list.  */
+  if (solib->main)
+    return;
+
+  solib->from_tty = from_tty;
+
+  /* Fill in the rest of the `struct so_list' node.  */
+  catch_errors (solib_map_sections, solib,
+		"Error while mapping shared library sections:\n",
+		RETURN_MASK_ALL);
+
+  /* If requested, add the shared object's sections to the TARGET's
+     section table.  Do this immediately after mapping the object so
+     that later nodes in the list can query this object, as is needed
+     in solib-osf.c.  */
+  if (target)
+    {
+      int count = (solib->sections_end - solib->sections);
+      if (count > 0)
+	{
+	  int space = target_resize_to_sections (target, count);
+          if (debug_solib)
+             fprintf_unfiltered (gdb_stdlog,
+                                 "add_to_target_sections: add %s to to_sections\n",
+                                 solib->so_original_name);
+	  memcpy (target->to_sections + space,
+		  solib->sections,
+		  count * sizeof (solib->sections[0]));
+	}
+    }
+}
 
 /*
 
@@ -1035,4 +1080,12 @@ This takes precedence over the environme
 				     reload_shared_libraries,
 				     show_solib_search_path,
 				     &setlist, &showlist);
+
+  add_setshow_boolean_cmd ("solib", no_class, &debug_solib,
+			   _("\
+Set debugging of GNU/Linux shlib module.\n"), _("\
+Show debugging status of GNU/Linux shlib module.\n"), _("\
+Enables printf debugging output of GNU/Linux shlib module.\n"),
+			   NULL, NULL,
+			   &setdebuglist, &showdebuglist);
 }
Index: gdb/elfread.c
===================================================================
--- a/gdb/elfread.c	2008-01-01 23:53:09.000000000 +0100
+++ b/gdb/elfread.c	2008-02-27 08:57:31.000000000 +0100
@@ -644,7 +644,7 @@ elf_symfile_read (struct objfile *objfil
   /* If we are reinitializing, or if we have never loaded syms yet,
      set table to empty.  MAINLINE is cleared so that *_read_psymtab
      functions do not all also re-initialize the psymbol table. */
-  if (mainline)
+  if (mainline == 1)
     {
       init_psymbol_list (objfile, 0);
       mainline = 0;
Index: gdb/Makefile.in
===================================================================
--- a/gdb/Makefile.in	2008-02-27 08:57:20.000000000 +0100
+++ b/gdb/Makefile.in	2008-02-27 08:57:31.000000000 +0100
@@ -1914,7 +1914,7 @@ amd64-tdep.o: amd64-tdep.c $(defs_h) $(a
 	$(dummy_frame_h) $(frame_h) $(frame_base_h) $(frame_unwind_h) \
 	$(inferior_h) $(gdbcmd_h) $(gdbcore_h) $(objfiles_h) $(regcache_h) \
 	$(regset_h) $(symfile_h) $(gdb_assert_h) $(amd64_tdep_h) \
-	$(i387_tdep_h)
+	$(i387_tdep_h) $(exceptions_h)
 annotate.o: annotate.c $(defs_h) $(annotate_h) $(value_h) $(target_h) \
 	$(gdbtypes_h) $(breakpoint_h)
 arch-utils.o: arch-utils.c $(defs_h) $(arch_utils_h) $(buildsym_h) \
Index: gdb/amd64-tdep.c
===================================================================
--- a/gdb/amd64-tdep.c	2008-02-27 08:57:19.000000000 +0100
+++ b/gdb/amd64-tdep.c	2008-02-27 08:57:31.000000000 +0100
@@ -36,6 +36,7 @@
 #include "symfile.h"
 #include "dwarf2-frame.h"
 #include "gdb_assert.h"
+#include "exceptions.h"
 
 #include "amd64-tdep.h"
 #include "i387-tdep.h"
@@ -731,16 +732,28 @@ amd64_alloc_frame_cache (void)
    Any function that doesn't start with this sequence will be assumed
    to have no prologue and thus no valid frame pointer in %rbp.  */
 
-static CORE_ADDR
-amd64_analyze_prologue (CORE_ADDR pc, CORE_ADDR current_pc,
-			struct amd64_frame_cache *cache)
+struct amd64_analyze_prologue_data
+  {
+    CORE_ADDR pc, current_pc;
+    struct amd64_frame_cache *cache;
+    CORE_ADDR retval;
+  };
+
+static int
+amd64_analyze_prologue_1 (void *data_pointer)
 {
+  struct amd64_analyze_prologue_data *data = data_pointer;
+  CORE_ADDR pc = data->pc, current_pc = data->current_pc;
+  struct amd64_frame_cache *cache = data->cache;
   static gdb_byte proto[3] = { 0x48, 0x89, 0xe5 }; /* movq %rsp, %rbp */
   gdb_byte buf[3];
   gdb_byte op;
 
   if (current_pc <= pc)
-    return current_pc;
+    {
+      data->retval = current_pc;
+      return 1;
+    }
 
   op = read_memory_unsigned_integer (pc, 1);
 
@@ -753,18 +766,57 @@ amd64_analyze_prologue (CORE_ADDR pc, CO
 
       /* If that's all, return now.  */
       if (current_pc <= pc + 1)
-        return current_pc;
+        {
+	  data->retval = current_pc;
+	  return 1;
+        }
 
       /* Check for `movq %rsp, %rbp'.  */
       read_memory (pc + 1, buf, 3);
       if (memcmp (buf, proto, 3) != 0)
-	return pc + 1;
+	{
+	  data->retval = pc + 1;
+	  return 1;
+	}
 
       /* OK, we actually have a frame.  */
       cache->frameless_p = 0;
-      return pc + 4;
+      data->retval = pc + 4;
+      return 1;
     }
 
+  data->retval = pc;
+  return 1;
+}
+
+/* Catch memory read errors and return just PC in such case.
+   It occurs very early on enable_break->new_symfile_objfile->
+   ->breakpoint_re_set->decode_line_1->decode_variable_1->
+   ->find_function_start_sal  */
+
+static CORE_ADDR
+amd64_analyze_prologue (CORE_ADDR pc, CORE_ADDR current_pc,
+			struct amd64_frame_cache *cache)
+{
+  int status;
+  struct amd64_analyze_prologue_data data;
+  struct ui_file *saved_gdb_stderr;
+
+  /* Suppress error messages.  */
+  saved_gdb_stderr = gdb_stderr;
+  gdb_stderr = ui_file_new ();
+
+  data.pc = pc;
+  data.current_pc = current_pc;
+  data.cache = cache;
+  status = catch_errors (amd64_analyze_prologue_1, &data, "", RETURN_MASK_ALL);
+
+  /* Stop suppressing error messages.  */
+  ui_file_delete (gdb_stderr);
+  gdb_stderr = saved_gdb_stderr;
+
+  if (status)
+    return data.retval;
   return pc;
 }