aboutsummaryrefslogtreecommitdiff
path: root/gdb/remote-rdi.c
blob: 69addf6ed35d22dbc68a5d3ffd108d7319d09896 (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
/* GDB interface to ARM RDI library.
   Copyright 1997, 1998 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include "defs.h"
#include "gdb_string.h"
#include <fcntl.h>
#include "frame.h"
#include "inferior.h"
#include "bfd.h"
#include "symfile.h"
#include "target.h"
#include "wait.h"
#include "gdbcmd.h"
#include "objfiles.h"
#include "gdb-stabs.h"
#include "gdbthread.h"
#include "gdbcore.h"

#ifdef USG
#include <sys/types.h>
#endif

#include <signal.h>

#include "rdi-share/ardi.h"
#include "rdi-share/adp.h"
#include "rdi-share/hsys.h"

extern int isascii PARAMS ((int));

/* Prototypes for local functions */

static void arm_rdi_files_info PARAMS ((struct target_ops * ignore));

static int arm_rdi_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr,
					int len, int should_write,
					struct target_ops * target));

static void arm_rdi_prepare_to_store PARAMS ((void));

static void arm_rdi_fetch_registers PARAMS ((int regno));

static void arm_rdi_resume PARAMS ((int pid, int step,
				    enum target_signal siggnal));

static int arm_rdi_start_remote PARAMS ((char *dummy));

static void arm_rdi_open PARAMS ((char *name, int from_tty));

static void arm_rdi_create_inferior PARAMS ((char *exec_file, char *args,
					     char **env));

static void arm_rdi_close PARAMS ((int quitting));

static void arm_rdi_store_registers PARAMS ((int regno));

static void arm_rdi_mourn PARAMS ((void));

static void arm_rdi_send PARAMS ((char *buf));

static int arm_rdi_wait PARAMS ((int pid, struct target_waitstatus * status));

static void arm_rdi_kill PARAMS ((void));

static void arm_rdi_detach PARAMS ((char *args, int from_tty));

static void arm_rdi_interrupt PARAMS ((int signo));

static void arm_rdi_interrupt_twice PARAMS ((int signo));

static void interrupt_query PARAMS ((void));

static int arm_rdi_insert_breakpoint PARAMS ((CORE_ADDR, char *));

static int arm_rdi_remove_breakpoint PARAMS ((CORE_ADDR, char *));

static char *rdi_error_message PARAMS ((int err));

static enum target_signal rdi_error_signal PARAMS ((int err));

/* Global variables.  */

struct target_ops arm_rdi_ops;

static struct Dbg_ConfigBlock gdb_config;

static struct Dbg_HostosInterface gdb_hostif;

static int max_load_size;

static int execute_status;

/* Send heatbeat packets? */
static int   rdi_heartbeat = 0;

/* Target has ROM at address 0. */
static int rom_at_zero = 0;

/* Enable logging? */
static int   log_enable = 0;

/* Name of the log file. Default is "rdi.log". */
static char *log_filename;

/* A little list of breakpoints that have been set.  */

static struct local_bp_list_entry
  {
    CORE_ADDR addr;
    PointHandle point;
    struct local_bp_list_entry *next;
  }
 *local_bp_list;


/* Stub for catch_errors.  */

static int
arm_rdi_start_remote (dummy)
     char *dummy;
{
  return 1;
}

/* Helper callbacks for the "host interface" structure.  RDI functions call
   these to forward output from the target system and so forth.  */

void
voiddummy ()
{
  fprintf_unfiltered (gdb_stdout, "void dummy\n");
}

static void
myprint (arg, format, ap)
     PTR arg;
     const char *format;
     va_list ap;
{
  vfprintf_unfiltered (gdb_stdout, format, ap);
}

static void
mywritec (arg, c)
     PTR arg;
     int c;
{
  if (isascii (c))
    fputc_unfiltered (c, gdb_stdout);
}

static int
mywrite (arg, buffer, len)
     PTR arg;
     char const *buffer;
     int len;
{
  int i;
  char *e;

  e = (char *) buffer;
  for (i = 0; i < len; i++)
    {
      if (isascii ((int) *e))
	{
	  fputc_unfiltered ((int) *e, gdb_stdout);
	  e++;
	}
    }

  return len;
}

static void
mypause (arg)
     PTR arg;
{
}

/* These last two are tricky as we have to handle the special case of
   being interrupted more carefully */

static int
myreadc (arg)
     PTR arg;
{
  return fgetc (stdin);
}

static char *
mygets (arg, buffer, len)
     PTR arg;
     char *buffer;
     int len;
{
  return fgets (buffer, len, stdin);
}

/* Prevent multiple calls to angel_RDI_close().  */
static int closed_already = 1;

/* Open a connection to a remote debugger.  NAME is the filename used
   for communication.  */

static void
arm_rdi_open (name, from_tty)
     char *name;
     int from_tty;
{
  int rslt, i;
  unsigned long arg1, arg2;
  char *openArgs = NULL;
  char *devName = NULL;
  char *p;

  if (name == NULL)
    error ("To open an RDI connection, you need to specify what serial\n\
device is attached to the remote system (e.g. /dev/ttya).");

  /* split name after whitespace, pass tail as arg to open command */

  devName = strdup(name);
  p = strchr(devName,' ');
  if (p)
    {
      *p = '\0';
      ++p;

      while (*p == ' ')
	++p;

      openArgs = p;
    }

  /* Make the basic low-level connection.  */

  Adp_CloseDevice ();
  rslt = Adp_OpenDevice (devName, openArgs, rdi_heartbeat);

  if (rslt != adp_ok)
    error ("Could not open device \"%s\"", name);

  gdb_config.bytesex = 2 | (TARGET_BYTE_ORDER == BIG_ENDIAN ? 1 : 0);
  gdb_config.fpe = 1;
  gdb_config.rditype = 2;
  gdb_config.heartbeat_on = 1;
  gdb_config.flags = 2;

  gdb_hostif.dbgprint = myprint;
  gdb_hostif.dbgpause = mypause;
  gdb_hostif.dbgarg = NULL;
  gdb_hostif.writec = mywritec;
  gdb_hostif.readc = myreadc;
  gdb_hostif.write = mywrite;
  gdb_hostif.gets = mygets;
  gdb_hostif.hostosarg = NULL;
  gdb_hostif.reset = voiddummy;

  rslt = angel_RDI_open (10, &gdb_config, &gdb_hostif, NULL);
  if (rslt == RDIError_BigEndian || rslt == RDIError_LittleEndian)
    ;				/* do nothing, this is the expected return */
  else if (rslt)
    {
      printf_filtered ("RDI_open: %s\n", rdi_error_message (rslt));
      Adp_CloseDevice ();
      error("RID_open failed\n");
    }

  rslt = angel_RDI_info (RDIInfo_Target, &arg1, &arg2);
  if (rslt)
    {
      printf_filtered ("RDI_info: %s\n", rdi_error_message (rslt));
    }
  rslt = angel_RDI_info (RDIInfo_Points, &arg1, &arg2);
  if (rslt)
    {
      printf_filtered ("RDI_info: %s\n", rdi_error_message (rslt));
    }
  rslt = angel_RDI_info (RDIInfo_Step, &arg1, &arg2);
  if (rslt)
    {
      printf_filtered ("RDI_info: %s\n", rdi_error_message (rslt));
    }
  rslt = angel_RDI_info (RDIInfo_CoPro, &arg1, &arg2);
  if (rslt)
    {
      printf_filtered ("RDI_info: %s\n", rdi_error_message (rslt));
    }
  rslt = angel_RDI_info (RDIInfo_SemiHosting, &arg1, &arg2);
  if (rslt)
    {
      printf_filtered ("RDI_info: %s\n", rdi_error_message (rslt));
    }

  rslt = angel_RDI_info (RDIInfo_GetLoadSize, &arg1, &arg2);
  if (rslt)
    {
      printf_filtered ("RDI_info: %s\n", rdi_error_message (rslt));
    }
  max_load_size = arg1;

  push_target (&arm_rdi_ops);

  target_fetch_registers (-1);

  rslt = angel_RDI_open (1, &gdb_config, NULL, NULL);
  if (rslt)
    {
      printf_filtered ("RDI_open: %s\n", rdi_error_message (rslt));
    }

  arg1 = rom_at_zero ? 0x0 : 0x13b;

  rslt = angel_RDI_info (RDIVector_Catch, &arg1, &arg2);
  if (rslt)
    {
      printf_filtered ("RDI_info: %s\n", rdi_error_message (rslt));
    }

  arg1 = (unsigned long) "";
  rslt = angel_RDI_info (RDISet_Cmdline, &arg1, &arg2);
  if (rslt)
    {
      printf_filtered ("RDI_info: %s\n", rdi_error_message (rslt));
    }

  /* Clear out any existing records of breakpoints.  */
  {
    struct local_bp_list_entry *entry, *preventry = NULL;

    for (entry = local_bp_list; entry != NULL; entry = entry->next)
      {
	if (preventry)
	  free (preventry);
      }
  }

  printf_filtered ("Connected to ARM RDI target.\n");
  closed_already = 0;
  inferior_pid = 42;
}

/* Start an inferior process and set inferior_pid to its pid.
   EXEC_FILE is the file to run.
   ARGS is a string containing the arguments to the program.
   ENV is the environment vector to pass.  Errors reported with error().
   On VxWorks and various standalone systems, we ignore exec_file.  */
/* This is called not only when we first attach, but also when the
   user types "run" after having attached.  */

static void
arm_rdi_create_inferior (exec_file, args, env)
     char *exec_file;
     char *args;
     char **env;
{
  int len, rslt;
  unsigned long arg1, arg2;
  char *arg_buf;
  CORE_ADDR entry_point;

  if (exec_file == 0 || exec_bfd == 0)
    error ("No executable file specified.");

  entry_point = (CORE_ADDR) bfd_get_start_address (exec_bfd);

  arm_rdi_kill ();
  remove_breakpoints ();
  init_wait_for_inferior ();

  len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10;
  arg_buf = (char *) alloca (len);
  arg_buf[0] = '\0';
  strcat (arg_buf, exec_file);
  strcat (arg_buf, " ");
  strcat (arg_buf, args);

  inferior_pid = 42;
  insert_breakpoints ();	/* Needed to get correct instruction in cache */

  if (env != NULL)
    {
      while (*env)
	{
	  if (strncmp (*env, "MEMSIZE=", sizeof ("MEMSIZE=") - 1) == 0)
	    {
	      unsigned long top_of_memory;
	      char *end_of_num;

	      /* Set up memory limit */
	      top_of_memory = strtoul (*env + sizeof ("MEMSIZE=") - 1,
				       &end_of_num, 0);
	      printf_filtered ("Setting top-of-memory to 0x%lx\n",
			       top_of_memory);

	      rslt = angel_RDI_info (RDIInfo_SetTopMem, &top_of_memory, &arg2);
	      if (rslt)
		{
		  printf_filtered ("RDI_info: %s\n", rdi_error_message (rslt));
		}
	    }
	  env++;
	}
    }

  arg1 = (unsigned long) arg_buf;
  rslt = angel_RDI_info (RDISet_Cmdline, /* &arg1 */ (unsigned long *) arg_buf, &arg2);
  if (rslt)
    {
      printf_filtered ("RDI_info: %s\n", rdi_error_message (rslt));
    }

  proceed (entry_point, TARGET_SIGNAL_DEFAULT, 0);
}

/* This takes a program previously attached to and detaches it.  After
   this is done, GDB can be used to debug some other program.  We
   better not have left any breakpoints in the target program or it'll
   die when it hits one.  */

static void
arm_rdi_detach (args, from_tty)
     char *args;
     int from_tty;
{
  pop_target ();
}

/* Clean up connection to a remote debugger.  */

static void
arm_rdi_close (quitting)
     int quitting;
{
  int rslt;

  if (!closed_already)
    {
      rslt = angel_RDI_close ();
      if (rslt)
	{
	  printf_filtered ("RDI_close: %s\n", rdi_error_message (rslt));
	}
      closed_already = 1;
      inferior_pid = 0;
      Adp_CloseDevice ();
    }
}

/* Tell the remote machine to resume.  */

static void
arm_rdi_resume (pid, step, siggnal)
     int pid, step;
     enum target_signal siggnal;
{
  int rslt;
  PointHandle point;

  if (0 /* turn on when hardware supports single-stepping */ )
    {
      rslt = angel_RDI_step (1, &point);
      if (rslt)
	{
	  printf_filtered ("RDI_step: %s\n", rdi_error_message (rslt));
	}
    }
  else
    {
      char handle[4];
      CORE_ADDR pc;

      if (step)
	{
	  pc = read_register (PC_REGNUM);
	  pc = arm_get_next_pc (pc);
	  arm_rdi_insert_breakpoint (pc, handle);
	}
      execute_status = rslt = angel_RDI_execute (&point);
      if (rslt == RDIError_BreakpointReached)
	;
      else if (rslt)
	{
	  printf_filtered ("RDI_execute: %s\n", rdi_error_message (rslt));
	}
      if (step)
	{
	  arm_rdi_remove_breakpoint (pc, handle);
	}
    }
}

/* Send ^C to target to halt it.  Target will respond, and send us a
   packet.  */

static void
arm_rdi_interrupt (signo)
     int signo;
{
}

static void (*ofunc) ();

/* The user typed ^C twice.  */
static void
arm_rdi_interrupt_twice (signo)
     int signo;
{
}

/* Ask the user what to do when an interrupt is received.  */

static void
interrupt_query ()
{
}

/* Wait until the remote machine stops, then return, storing status in
   STATUS just as `wait' would.  Returns "pid" (though it's not clear
   what, if anything, that means in the case of this target).  */

static int
arm_rdi_wait (pid, status)
     int pid;
     struct target_waitstatus *status;
{
  status->kind = (execute_status == RDIError_NoError ?
		  TARGET_WAITKIND_EXITED : TARGET_WAITKIND_STOPPED);

  /* convert stopped code from target into right signal */
  status->value.sig = rdi_error_signal (execute_status);

  return inferior_pid;
}

/* Read the remote registers into the block REGS.  */

/* ARGSUSED */
static void
arm_rdi_fetch_registers (regno)
     int regno;
{
  int rslt, rdi_regmask;
  unsigned long rawreg, rawregs[32];
  char cookedreg[4];

  if (regno == -1)
    {
      rslt = angel_RDI_CPUread (255, 0x27fff, rawregs);
      if (rslt)
	{
	  printf_filtered ("RDI_CPUread: %s\n", rdi_error_message (rslt));
	}

      for (regno = 0; regno < 15; regno++)
	{
	  store_unsigned_integer (cookedreg, 4, rawregs[regno]);
	  supply_register (regno, (char *) cookedreg);
	}
      store_unsigned_integer (cookedreg, 4, rawregs[15]);
      supply_register (PS_REGNUM, (char *) cookedreg);
      arm_rdi_fetch_registers (PC_REGNUM);
    }
  else
    {
      if (regno == PC_REGNUM)
	rdi_regmask = RDIReg_PC;
      else if (regno == PS_REGNUM)
	rdi_regmask = RDIReg_CPSR;
      else if (regno < 0 || regno > 15)
	{
	  rawreg = 0;
	  supply_register (regno, (char *) &rawreg);
	  return;
	}
      else
	rdi_regmask = 1 << regno;

      rslt = angel_RDI_CPUread (255, rdi_regmask, &rawreg);
      if (rslt)
	{
	  printf_filtered ("RDI_CPUread: %s\n", rdi_error_message (rslt));
	}
      store_unsigned_integer (cookedreg, 4, rawreg);
      supply_register (regno, (char *) cookedreg);
    }
}

static void
arm_rdi_prepare_to_store ()
{
  /* Nothing to do.  */
}

/* Store register REGNO, or all registers if REGNO == -1, from the contents
   of REGISTERS.  FIXME: ignores errors.  */

static void
arm_rdi_store_registers (regno)
     int regno;
{
  int rslt, rdi_regmask;

  /* These need to be able to take 'floating point register' contents */
  unsigned long rawreg[3], rawerreg[3];

  if (regno == -1)
    {
      for (regno = 0; regno < NUM_REGS; regno++)
	arm_rdi_store_registers (regno);
    }
  else
    {
      read_register_gen (regno, (char *) rawreg);
      /* RDI manipulates data in host byte order, so convert now. */
      store_unsigned_integer (rawerreg, 4, rawreg[0]);

      if (regno == PC_REGNUM)
	rdi_regmask = RDIReg_PC;
      else if (regno == PS_REGNUM)
	rdi_regmask = RDIReg_CPSR;
      else if (regno < 0 || regno > 15)
	return;
      else
	rdi_regmask = 1 << regno;

      rslt = angel_RDI_CPUwrite (255, rdi_regmask, rawerreg);
      if (rslt)
	{
	  printf_filtered ("RDI_CPUwrite: %s\n", rdi_error_message (rslt));
	}
    }
}

/* Read or write LEN bytes from inferior memory at MEMADDR,
   transferring to or from debugger address MYADDR.  Write to inferior
   if SHOULD_WRITE is nonzero.  Returns length of data written or
   read; 0 for error.  */

/* ARGSUSED */
static int
arm_rdi_xfer_memory (memaddr, myaddr, len, should_write, target)
     CORE_ADDR memaddr;
     char *myaddr;
     int len;
     int should_write;
     struct target_ops *target;	/* ignored */
{
  int rslt, i;

  if (should_write)
    {
      rslt = angel_RDI_write (myaddr, memaddr, &len);
      if (rslt)
	{
	  printf_filtered ("RDI_write: %s\n", rdi_error_message (rslt));
	}
    }
  else
    {
      rslt = angel_RDI_read (memaddr, myaddr, &len);
      if (rslt)
	{
	  printf_filtered ("RDI_read: %s\n", rdi_error_message (rslt));
	  len = 0;
	}
    }
  return len;
}

/* Display random info collected from the target.  */

static void
arm_rdi_files_info (ignore)
     struct target_ops *ignore;
{
  char *file = "nothing";
  int rslt;
  unsigned long arg1, arg2;

  rslt = angel_RDI_info (RDIInfo_Target, &arg1, &arg2);
  if (rslt)
    {
      printf_filtered ("RDI_info: %s\n", rdi_error_message (rslt));
    }
  if (arg1 & (1 << 15))
    printf_filtered ("Target supports Thumb code.\n");
  if (arg1 & (1 << 14))
    printf_filtered ("Target can do profiling.\n");
  if (arg1 & (1 << 4))
    printf_filtered ("Target is real hardware.\n");

  rslt = angel_RDI_info (RDIInfo_Step, &arg1, &arg2);
  if (rslt)
    {
      printf_filtered ("RDI_info: %s\n", rdi_error_message (rslt));
    }
  printf_filtered ("Target can%s single-step.\n", (arg1 & 0x4 ? "" : "not"));

  rslt = angel_RDI_info (RDIInfo_Icebreaker, &arg1, &arg2);
  if (rslt)
    {
      printf_filtered ("RDI_info: %s\n", rdi_error_message (rslt));
    }
  else
    printf_filtered ("Target includes an EmbeddedICE.\n");
}

static void
arm_rdi_kill ()
{
  int rslt;

  rslt = angel_RDI_open (1, &gdb_config, NULL, NULL);
  if (rslt)
    {
      printf_filtered ("RDI_open: %s\n", rdi_error_message (rslt));
    }
}

static void
arm_rdi_mourn_inferior ()
{
  unpush_target (&arm_rdi_ops);
  generic_mourn_inferior ();
}

/* While the RDI library keeps track of its own breakpoints, we need
   to remember "handles" so that we can delete them later.  Since
   breakpoints get used for stepping, be careful not to leak memory
   here.  */

static int
arm_rdi_insert_breakpoint (addr, contents_cache)
     CORE_ADDR addr;
     char *contents_cache;
{
  int rslt;
  PointHandle point;
  struct local_bp_list_entry *entry;
  int type = RDIPoint_EQ;

  if (arm_pc_is_thumb (addr) || arm_pc_is_thumb_dummy (addr))
    type |= RDIPoint_16Bit;
  rslt = angel_RDI_setbreak (addr, type, 0, &point);
  if (rslt)
    {
      printf_filtered ("RDI_setbreak: %s\n", rdi_error_message (rslt));
    }
  entry =
    (struct local_bp_list_entry *) xmalloc (sizeof (struct local_bp_list_entry));
  entry->addr = addr;
  entry->point = point;
  entry->next = local_bp_list;
  local_bp_list = entry;
  return rslt;
}

static int
arm_rdi_remove_breakpoint (addr, contents_cache)
     CORE_ADDR addr;
     char *contents_cache;
{
  int rslt;
  PointHandle point;
  struct local_bp_list_entry *entry, *preventry;

  for (entry = local_bp_list; entry != NULL; entry = entry->next)
    {
      if (entry->addr == addr)
	{
	  break;
	}
      preventry = entry;
    }
  if (entry)
    {
      rslt = angel_RDI_clearbreak (entry->point);
      if (rslt)
	{
	  printf_filtered ("RDI_clearbreak: %s\n", rdi_error_message (rslt));
	}
      /* Delete the breakpoint entry locally.  */
      if (entry == local_bp_list)
	{
	  local_bp_list = entry->next;
	}
      else
	{
	  preventry->next = entry->next;
	}
      free (entry);
    }
  return 0;
}

static char *
rdi_error_message (err)
     int err;
{
  switch (err)
    {
    case RDIError_NoError:
      return "no error";
    case RDIError_Reset:
      return "debuggee reset";
    case RDIError_UndefinedInstruction:
      return "undefined instruction";
    case RDIError_SoftwareInterrupt:
      return "SWI trapped";
    case RDIError_PrefetchAbort:
      return "prefetch abort, execution ran into unmapped memory?";
    case RDIError_DataAbort:
      return "data abort, no memory at specified address?";
    case RDIError_AddressException:
      return "address exception, access >26bit in 26bit mode";
    case RDIError_IRQ:
      return "IRQ, interrupt trapped";
    case RDIError_FIQ:
      return "FIQ, fast interrupt trapped";
    case RDIError_Error:
      return "a miscellaneous type of error";
    case RDIError_BranchThrough0:
      return "branch through location 0";
    case RDIError_NotInitialised:
      return "internal error, RDI_open not called first";
    case RDIError_UnableToInitialise:
      return "internal error, target world is broken";
    case RDIError_WrongByteSex:
      return "See Operator: WrongByteSex";
    case RDIError_UnableToTerminate:
      return "See Operator: Unable to Terminate";
    case RDIError_BadInstruction:
      return "bad instruction, illegal to execute this instruction";
    case RDIError_IllegalInstruction:
      return "illegal instruction, the effect of executing it is undefined";
    case RDIError_BadCPUStateSetting:
      return "internal error, tried to set SPSR of user mode";
    case RDIError_UnknownCoPro:
      return "unknown co-processor";
    case RDIError_UnknownCoProState:
      return "cannot execute co-processor request";
    case RDIError_BadCoProState:
      return "recognizably broken co-processor request";
    case RDIError_BadPointType:
      return "internal error, bad point yype";
    case RDIError_UnimplementedType:
      return "internal error, unimplemented type";
    case RDIError_BadPointSize:
      return "internal error, bad point size";
    case RDIError_UnimplementedSize:
      return "internal error, unimplemented size";
    case RDIError_NoMorePoints:
      return "last break/watch point was used";
    case RDIError_BreakpointReached:
      return "breakpoint reached";
    case RDIError_WatchpointAccessed:
      return "watchpoint accessed";
    case RDIError_NoSuchPoint:
      return "attempted to clear non-existent break/watch point";
    case RDIError_ProgramFinishedInStep:
      return "end of the program reached while stepping";
    case RDIError_UserInterrupt:
      return "you pressed Escape";
    case RDIError_CantSetPoint:
      return "no more break/watch points available";
    case RDIError_IncompatibleRDILevels:
      return "incompatible RDI levels";
    case RDIError_LittleEndian:
      return "debuggee is little endian";
    case RDIError_BigEndian:
      return "debuggee is big endian";
    case RDIError_SoftInitialiseError:
      return "recoverable error in RDI initialization";
    case RDIError_InsufficientPrivilege:
      return "internal error, supervisor state not accessible to monitor";
    case RDIError_UnimplementedMessage:
      return "internal error, unimplemented message";
    case RDIError_UndefinedMessage:
      return "internal error, undefined message";
    default:
      return "undefined error message, should reset target";
    }
}

/* Convert the ARM error messages to signals that GDB knows about.  */

static enum target_signal
rdi_error_signal (err)
     int err;
{
  switch (err)
    {
    case RDIError_NoError:
      return 0;
    case RDIError_Reset:
      return TARGET_SIGNAL_TERM;	/* ??? */
    case RDIError_UndefinedInstruction:
      return TARGET_SIGNAL_ILL;
    case RDIError_SoftwareInterrupt:
    case RDIError_PrefetchAbort:
    case RDIError_DataAbort:
      return TARGET_SIGNAL_TRAP;
    case RDIError_AddressException:
      return TARGET_SIGNAL_SEGV;
    case RDIError_IRQ:
    case RDIError_FIQ:
      return TARGET_SIGNAL_TRAP;
    case RDIError_Error:
      return TARGET_SIGNAL_TERM;
    case RDIError_BranchThrough0:
      return TARGET_SIGNAL_TRAP;
    case RDIError_NotInitialised:
    case RDIError_UnableToInitialise:
    case RDIError_WrongByteSex:
    case RDIError_UnableToTerminate:
      return TARGET_SIGNAL_UNKNOWN;
    case RDIError_BadInstruction:
    case RDIError_IllegalInstruction:
      return TARGET_SIGNAL_ILL;
    case RDIError_BadCPUStateSetting:
    case RDIError_UnknownCoPro:
    case RDIError_UnknownCoProState:
    case RDIError_BadCoProState:
    case RDIError_BadPointType:
    case RDIError_UnimplementedType:
    case RDIError_BadPointSize:
    case RDIError_UnimplementedSize:
    case RDIError_NoMorePoints:
      return TARGET_SIGNAL_UNKNOWN;
    case RDIError_BreakpointReached:
    case RDIError_WatchpointAccessed:
      return TARGET_SIGNAL_TRAP;
    case RDIError_NoSuchPoint:
    case RDIError_ProgramFinishedInStep:
      return TARGET_SIGNAL_UNKNOWN;
    case RDIError_UserInterrupt:
      return TARGET_SIGNAL_INT;
    case RDIError_IncompatibleRDILevels:
    case RDIError_LittleEndian:
    case RDIError_BigEndian:
    case RDIError_SoftInitialiseError:
    case RDIError_InsufficientPrivilege:
    case RDIError_UnimplementedMessage:
    case RDIError_UndefinedMessage:
    default:
      return TARGET_SIGNAL_UNKNOWN;
    }
}

/* Define the target operations structure.  */

static void
init_rdi_ops ()
{
  arm_rdi_ops.to_shortname = "rdi";
  arm_rdi_ops.to_longname = "ARM RDI";
  arm_rdi_ops.to_doc = "Use a remote ARM-based computer; via the RDI library.\n\
Specify the serial device it is connected to (e.g. /dev/ttya).";
  arm_rdi_ops.to_open = arm_rdi_open;
  arm_rdi_ops.to_close = arm_rdi_close;
  arm_rdi_ops.to_detach = arm_rdi_detach;
  arm_rdi_ops.to_resume = arm_rdi_resume;
  arm_rdi_ops.to_wait = arm_rdi_wait;
  arm_rdi_ops.to_fetch_registers = arm_rdi_fetch_registers;
  arm_rdi_ops.to_store_registers = arm_rdi_store_registers;
  arm_rdi_ops.to_prepare_to_store = arm_rdi_prepare_to_store;
  arm_rdi_ops.to_xfer_memory = arm_rdi_xfer_memory;
  arm_rdi_ops.to_files_info = arm_rdi_files_info;
  arm_rdi_ops.to_insert_breakpoint = arm_rdi_insert_breakpoint;
  arm_rdi_ops.to_remove_breakpoint = arm_rdi_remove_breakpoint;
  arm_rdi_ops.to_kill = arm_rdi_kill;
  arm_rdi_ops.to_load = generic_load;
  arm_rdi_ops.to_create_inferior = arm_rdi_create_inferior;
  arm_rdi_ops.to_mourn_inferior = arm_rdi_mourn_inferior;
  arm_rdi_ops.to_stratum = process_stratum;
  arm_rdi_ops.to_has_all_memory = 1;
  arm_rdi_ops.to_has_memory = 1;
  arm_rdi_ops.to_has_stack = 1;
  arm_rdi_ops.to_has_registers = 1;
  arm_rdi_ops.to_has_execution = 1;
  arm_rdi_ops.to_magic = OPS_MAGIC;
}

static void rdilogfile_command (char *arg, int from_tty)
{
  if (!arg || strlen (arg) == 0)
    {
      printf_filtered ("rdi log file is '%s'\n", log_filename);
      return;
    }
  
  if (log_filename)
    free (log_filename);
  
  log_filename = strdup (arg);

  Adp_SetLogfile (log_filename);
}

static void rdilogenable_command (char *args, int from_tty)
{
  if (!args || strlen (args) == 0)
    {
      printf_filtered ("rdi log is %s\n", log_enable ? "enabled" : "disabled");
      return;
    }
  
  if (!strcasecmp (args,"1") || 
      !strcasecmp (args,"y") ||
      !strcasecmp (args,"yes") ||
      !strcasecmp (args,"on") ||
      !strcasecmp (args,"t") ||
      !strcasecmp (args,"true"))
    Adp_SetLogEnable (log_enable=1);
  else if (!strcasecmp (args,"0") || 
      !strcasecmp (args,"n") ||
      !strcasecmp (args,"no") ||
      !strcasecmp (args,"off") ||
      !strcasecmp (args,"f") ||
      !strcasecmp (args,"false"))
    Adp_SetLogEnable (log_enable=0);
  else
    printf_filtered ("rdilogenable: unrecognized argument '%s'\n"
                     "              try y or n\n",args);
}

void
_initialize_remote_rdi ()
{
  init_rdi_ops ();
  add_target (&arm_rdi_ops);

  log_filename = strdup("rdi.log");
  Adp_SetLogfile(log_filename);
  Adp_SetLogEnable(log_enable);

  add_cmd ("rdilogfile", class_maintenance,
	   rdilogfile_command,
	   "Set filename for ADP packet log.\n\
This file is used to log Angel Debugger Protocol packets.\n\
With a single argument, sets the logfile name to that value.\n\
Without an argument, shows the current logfile name.\n\
See also: rdilogenable\n",
	   &maintenancelist);

  add_cmd("rdilogenable", class_maintenance,
	   rdilogenable_command,
	   "Set enable logging of ADP packets.\n\
This will log ADP packets exchanged between gdb and the\n\
rdi target device.\n\
An argument of 1,t,true,y,yes will enable.\n\
An argument of 0,f,false,n,no will disabled.\n\
Withough an argument, it will display current state.\n",
	   &maintenancelist);

  add_show_from_set
    (add_set_cmd ("rdiromatzero", no_class,
		  var_boolean, (char *) &rom_at_zero,
		  "Set target has ROM at addr 0.\n\
A true value disables vector catching, false enables vector catching.\n\
This is evaluated at the time the 'target rdi' command is executed\n",
		  &setlist),
    &showlist);

  add_show_from_set
    (add_set_cmd ("rdiheartbeat", no_class,
		  var_boolean, (char *) &rdi_heartbeat,
		  "Set enable for ADP heartbeat packets.\n\
I don't know why you would want this. If you enable them,\n\
it will confuse ARM and EPI JTAG interface boxes as well\n\
as the Angel Monitor.\n",
		  &setlist),
    &showlist);
}

/* A little dummy to make linking with the library succeed. */

int
Fail ()
{
  return 0;
}