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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [gdb/] [aix-thread.c] - Blame information for rev 840

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1 24 jeremybenn
/* Low level interface for debugging AIX 4.3+ pthreads.
2
 
3
   Copyright (C) 1999, 2000, 2002, 2007, 2008 Free Software Foundation, Inc.
4
   Written by Nick Duffek <nsd@redhat.com>.
5
 
6
   This file is part of GDB.
7
 
8
   This program is free software; you can redistribute it and/or modify
9
   it under the terms of the GNU General Public License as published by
10
   the Free Software Foundation; either version 3 of the License, or
11
   (at your option) any later version.
12
 
13
   This program is distributed in the hope that it will be useful,
14
   but WITHOUT ANY WARRANTY; without even the implied warranty of
15
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
   GNU General Public License for more details.
17
 
18
   You should have received a copy of the GNU General Public License
19
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
20
 
21
 
22
/* This module uses the libpthdebug.a library provided by AIX 4.3+ for
23
   debugging pthread applications.
24
 
25
   Some name prefix conventions:
26
     pthdb_     provided by libpthdebug.a
27
     pdc_       callbacks that this module provides to libpthdebug.a
28
     pd_        variables or functions interfacing with libpthdebug.a
29
 
30
   libpthdebug peculiarities:
31
 
32
     - pthdb_ptid_pthread() is prototyped in <sys/pthdebug.h>, but
33
       it's not documented, and after several calls it stops working
34
       and causes other libpthdebug functions to fail.
35
 
36
     - pthdb_tid_pthread() doesn't always work after
37
       pthdb_session_update(), but it does work after cycling through
38
       all threads using pthdb_pthread().
39
 
40
     */
41
 
42
#include "defs.h"
43
#include "gdb_assert.h"
44
#include "gdbthread.h"
45
#include "target.h"
46
#include "inferior.h"
47
#include "regcache.h"
48
#include "gdbcmd.h"
49
#include "ppc-tdep.h"
50
#include "gdb_string.h"
51
#include "observer.h"
52
 
53
#include <procinfo.h>
54
#include <sys/types.h>
55
#include <sys/ptrace.h>
56
#include <sys/reg.h>
57
#include <sched.h>
58
#include <sys/pthdebug.h>
59
 
60
/* Whether to emit debugging output.  */
61
static int debug_aix_thread;
62
 
63
/* In AIX 5.1, functions use pthdb_tid_t instead of tid_t.  */
64
#ifndef PTHDB_VERSION_3
65
#define pthdb_tid_t     tid_t
66
#endif
67
 
68
/* Return whether to treat PID as a debuggable thread id.  */
69
 
70
#define PD_TID(ptid)    (pd_active && ptid_get_tid (ptid) != 0)
71
 
72
/* Build a thread ptid.  */
73
#define BUILD_THREAD(TID, PID) ptid_build (PID, 0, TID)
74
 
75
/* Build and lwp ptid.  */
76
#define BUILD_LWP(LWP, PID) MERGEPID (PID, LWP)
77
 
78
/* pthdb_user_t value that we pass to pthdb functions.  0 causes
79
   PTHDB_BAD_USER errors, so use 1.  */
80
 
81
#define PD_USER 1
82
 
83
/* Success and failure values returned by pthdb callbacks.  */
84
 
85
#define PDC_SUCCESS     PTHDB_SUCCESS
86
#define PDC_FAILURE     PTHDB_CALLBACK
87
 
88
/* Private data attached to each element in GDB's thread list.  */
89
 
90
struct private_thread_info {
91
  pthdb_pthread_t pdtid;         /* thread's libpthdebug id */
92
  pthdb_tid_t tid;                      /* kernel thread id */
93
};
94
 
95
/* Information about a thread of which libpthdebug is aware.  */
96
 
97
struct pd_thread {
98
  pthdb_pthread_t pdtid;
99
  pthread_t pthid;
100
  pthdb_tid_t tid;
101
};
102
 
103
/* This module's target-specific operations, active while pd_able is true.  */
104
 
105
static struct target_ops aix_thread_ops;
106
 
107
/* Copy of the target over which ops is pushed.  This is more
108
   convenient than a pointer to deprecated_child_ops or core_ops,
109
   because they lack current_target's default callbacks.  */
110
 
111
static struct target_ops base_target;
112
 
113
/* Address of the function that libpthread will call when libpthdebug
114
   is ready to be initialized.  */
115
 
116
static CORE_ADDR pd_brk_addr;
117
 
118
/* Whether the current application is debuggable by pthdb.  */
119
 
120
static int pd_able = 0;
121
 
122
/* Whether a threaded application is being debugged.  */
123
 
124
static int pd_active = 0;
125
 
126
/* Whether the current architecture is 64-bit.
127
   Only valid when pd_able is true.  */
128
 
129
static int arch64;
130
 
131
/* Forward declarations for pthdb callbacks.  */
132
 
133
static int pdc_symbol_addrs (pthdb_user_t, pthdb_symbol_t *, int);
134
static int pdc_read_data (pthdb_user_t, void *, pthdb_addr_t, size_t);
135
static int pdc_write_data (pthdb_user_t, void *, pthdb_addr_t, size_t);
136
static int pdc_read_regs (pthdb_user_t user, pthdb_tid_t tid,
137
                          unsigned long long flags,
138
                          pthdb_context_t *context);
139
static int pdc_write_regs (pthdb_user_t user, pthdb_tid_t tid,
140
                           unsigned long long flags,
141
                           pthdb_context_t *context);
142
static int pdc_alloc (pthdb_user_t, size_t, void **);
143
static int pdc_realloc (pthdb_user_t, void *, size_t, void **);
144
static int pdc_dealloc (pthdb_user_t, void *);
145
 
146
/* pthdb callbacks.  */
147
 
148
static pthdb_callbacks_t pd_callbacks = {
149
  pdc_symbol_addrs,
150
  pdc_read_data,
151
  pdc_write_data,
152
  pdc_read_regs,
153
  pdc_write_regs,
154
  pdc_alloc,
155
  pdc_realloc,
156
  pdc_dealloc,
157
  NULL
158
};
159
 
160
/* Current pthdb session.  */
161
 
162
static pthdb_session_t pd_session;
163
 
164
/* Return a printable representation of pthdebug function return
165
   STATUS.  */
166
 
167
static char *
168
pd_status2str (int status)
169
{
170
  switch (status)
171
    {
172
    case PTHDB_SUCCESS:         return "SUCCESS";
173
    case PTHDB_NOSYS:           return "NOSYS";
174
    case PTHDB_NOTSUP:          return "NOTSUP";
175
    case PTHDB_BAD_VERSION:     return "BAD_VERSION";
176
    case PTHDB_BAD_USER:        return "BAD_USER";
177
    case PTHDB_BAD_SESSION:     return "BAD_SESSION";
178
    case PTHDB_BAD_MODE:        return "BAD_MODE";
179
    case PTHDB_BAD_FLAGS:       return "BAD_FLAGS";
180
    case PTHDB_BAD_CALLBACK:    return "BAD_CALLBACK";
181
    case PTHDB_BAD_POINTER:     return "BAD_POINTER";
182
    case PTHDB_BAD_CMD:         return "BAD_CMD";
183
    case PTHDB_BAD_PTHREAD:     return "BAD_PTHREAD";
184
    case PTHDB_BAD_ATTR:        return "BAD_ATTR";
185
    case PTHDB_BAD_MUTEX:       return "BAD_MUTEX";
186
    case PTHDB_BAD_MUTEXATTR:   return "BAD_MUTEXATTR";
187
    case PTHDB_BAD_COND:        return "BAD_COND";
188
    case PTHDB_BAD_CONDATTR:    return "BAD_CONDATTR";
189
    case PTHDB_BAD_RWLOCK:      return "BAD_RWLOCK";
190
    case PTHDB_BAD_RWLOCKATTR:  return "BAD_RWLOCKATTR";
191
    case PTHDB_BAD_KEY:         return "BAD_KEY";
192
    case PTHDB_BAD_PTID:        return "BAD_PTID";
193
    case PTHDB_BAD_TID:         return "BAD_TID";
194
    case PTHDB_CALLBACK:        return "CALLBACK";
195
    case PTHDB_CONTEXT:         return "CONTEXT";
196
    case PTHDB_HELD:            return "HELD";
197
    case PTHDB_NOT_HELD:        return "NOT_HELD";
198
    case PTHDB_MEMORY:          return "MEMORY";
199
    case PTHDB_NOT_PTHREADED:   return "NOT_PTHREADED";
200
    case PTHDB_SYMBOL:          return "SYMBOL";
201
    case PTHDB_NOT_AVAIL:       return "NOT_AVAIL";
202
    case PTHDB_INTERNAL:        return "INTERNAL";
203
    default:                    return "UNKNOWN";
204
    }
205
}
206
 
207
/* A call to ptrace(REQ, ID, ...) just returned RET.  Check for
208
   exceptional conditions and either return nonlocally or else return
209
   1 for success and 0 for failure.  */
210
 
211
static int
212
ptrace_check (int req, int id, int ret)
213
{
214
  if (ret == 0 && !errno)
215
    return 1;
216
 
217
  /* According to ptrace(2), ptrace may fail with EPERM if "the
218
     Identifier parameter corresponds to a kernel thread which is
219
     stopped in kernel mode and whose computational state cannot be
220
     read or written."  This happens quite often with register reads.  */
221
 
222
  switch (req)
223
    {
224
    case PTT_READ_GPRS:
225
    case PTT_READ_FPRS:
226
    case PTT_READ_SPRS:
227
      if (ret == -1 && errno == EPERM)
228
        {
229
          if (debug_aix_thread)
230
            fprintf_unfiltered (gdb_stdlog,
231
                                "ptrace (%d, %d) = %d (errno = %d)\n",
232
                                req, id, ret, errno);
233
          return ret == -1 ? 0 : 1;
234
        }
235
      break;
236
    }
237
  error (_("aix-thread: ptrace (%d, %d) returned %d (errno = %d %s)"),
238
         req, id, ret, errno, safe_strerror (errno));
239
  return 0;  /* Not reached.  */
240
}
241
 
242
/* Call ptracex (REQ, ID, ADDR, DATA, BUF).  Return success.  */
243
 
244
static int
245
ptrace64aix (int req, int id, long long addr, int data, int *buf)
246
{
247
  errno = 0;
248
  return ptrace_check (req, id, ptracex (req, id, addr, data, buf));
249
}
250
 
251
/* Call ptrace (REQ, ID, ADDR, DATA, BUF).  Return success.  */
252
 
253
static int
254
ptrace32 (int req, int id, int *addr, int data, int *buf)
255
{
256
  errno = 0;
257
  return ptrace_check (req, id,
258
                       ptrace (req, id, (int *) addr, data, buf));
259
}
260
 
261
/* If *PIDP is a composite process/thread id, convert it to a
262
   process id.  */
263
 
264
static void
265
pid_to_prc (ptid_t *ptidp)
266
{
267
  ptid_t ptid;
268
 
269
  ptid = *ptidp;
270
  if (PD_TID (ptid))
271
    *ptidp = pid_to_ptid (PIDGET (ptid));
272
}
273
 
274
/* pthdb callback: for <i> from 0 to COUNT, set SYMBOLS[<i>].addr to
275
   the address of SYMBOLS[<i>].name.  */
276
 
277
static int
278
pdc_symbol_addrs (pthdb_user_t user, pthdb_symbol_t *symbols, int count)
279
{
280
  struct minimal_symbol *ms;
281
  int i;
282
  char *name;
283
 
284
  if (debug_aix_thread)
285
    fprintf_unfiltered (gdb_stdlog,
286
      "pdc_symbol_addrs (user = %ld, symbols = 0x%lx, count = %d)\n",
287
      user, (long) symbols, count);
288
 
289
  for (i = 0; i < count; i++)
290
    {
291
      name = symbols[i].name;
292
      if (debug_aix_thread)
293
        fprintf_unfiltered (gdb_stdlog,
294
                            "  symbols[%d].name = \"%s\"\n", i, name);
295
 
296
      if (!*name)
297
        symbols[i].addr = 0;
298
      else
299
        {
300
          if (!(ms = lookup_minimal_symbol (name, NULL, NULL)))
301
            {
302
              if (debug_aix_thread)
303
                fprintf_unfiltered (gdb_stdlog, " returning PDC_FAILURE\n");
304
              return PDC_FAILURE;
305
            }
306
          symbols[i].addr = SYMBOL_VALUE_ADDRESS (ms);
307
        }
308
      if (debug_aix_thread)
309
        fprintf_unfiltered (gdb_stdlog, "  symbols[%d].addr = %s\n",
310
                            i, hex_string (symbols[i].addr));
311
    }
312
  if (debug_aix_thread)
313
    fprintf_unfiltered (gdb_stdlog, " returning PDC_SUCCESS\n");
314
  return PDC_SUCCESS;
315
}
316
 
317
/* Read registers call back function should be able to read the
318
   context information of a debuggee kernel thread from an active
319
   process or from a core file.  The information should be formatted
320
   in context64 form for both 32-bit and 64-bit process.
321
   If successful return 0, else non-zero is returned.  */
322
 
323
static int
324
pdc_read_regs (pthdb_user_t user,
325
               pthdb_tid_t tid,
326
               unsigned long long flags,
327
               pthdb_context_t *context)
328
{
329
  /* This function doesn't appear to be used, so we could probably
330
   just return 0 here.  HOWEVER, if it is not defined, the OS will
331
   complain and several thread debug functions will fail.  In case
332
   this is needed, I have implemented what I think it should do,
333
   however this code is untested.  */
334
 
335
  uint64_t gprs64[ppc_num_gprs];
336
  uint32_t gprs32[ppc_num_gprs];
337
  double fprs[ppc_num_fprs];
338
  struct ptxsprs sprs64;
339
  struct ptsprs sprs32;
340
 
341
  if (debug_aix_thread)
342
    fprintf_unfiltered (gdb_stdlog, "pdc_read_regs tid=%d flags=%s\n",
343
                        (int) tid, hex_string (flags));
344
 
345
  /* General-purpose registers.  */
346
  if (flags & PTHDB_FLAG_GPRS)
347
    {
348
      if (arch64)
349
        {
350
          if (!ptrace64aix (PTT_READ_GPRS, tid,
351
                            (unsigned long) gprs64, 0, NULL))
352
            memset (gprs64, 0, sizeof (gprs64));
353
          memcpy (context->gpr, gprs64, sizeof(gprs64));
354
        }
355
      else
356
        {
357
          if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL))
358
            memset (gprs32, 0, sizeof (gprs32));
359
          memcpy (context->gpr, gprs32, sizeof(gprs32));
360
        }
361
    }
362
 
363
  /* Floating-point registers.  */
364
  if (flags & PTHDB_FLAG_FPRS)
365
    {
366
      if (!ptrace32 (PTT_READ_FPRS, tid, (void *) fprs, 0, NULL))
367
        memset (fprs, 0, sizeof (fprs));
368
          memcpy (context->fpr, fprs, sizeof(fprs));
369
    }
370
 
371
  /* Special-purpose registers.  */
372
  if (flags & PTHDB_FLAG_SPRS)
373
    {
374
      if (arch64)
375
        {
376
          if (!ptrace64aix (PTT_READ_SPRS, tid,
377
                            (unsigned long) &sprs64, 0, NULL))
378
            memset (&sprs64, 0, sizeof (sprs64));
379
          memcpy (&context->msr, &sprs64, sizeof(sprs64));
380
        }
381
      else
382
        {
383
          if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL))
384
            memset (&sprs32, 0, sizeof (sprs32));
385
          memcpy (&context->msr, &sprs32, sizeof(sprs32));
386
        }
387
    }
388
  return 0;
389
}
390
 
391
/* Write register function should be able to write requested context
392
   information to specified debuggee's kernel thread id.
393
   If successful return 0, else non-zero is returned.  */
394
 
395
static int
396
pdc_write_regs (pthdb_user_t user,
397
                pthdb_tid_t tid,
398
                unsigned long long flags,
399
                pthdb_context_t *context)
400
{
401
  /* This function doesn't appear to be used, so we could probably
402
     just return 0 here.  HOWEVER, if it is not defined, the OS will
403
     complain and several thread debug functions will fail.  In case
404
     this is needed, I have implemented what I think it should do,
405
     however this code is untested.  */
406
 
407
  if (debug_aix_thread)
408
    fprintf_unfiltered (gdb_stdlog, "pdc_write_regs tid=%d flags=%s\n",
409
                        (int) tid, hex_string (flags));
410
 
411
  /* General-purpose registers.  */
412
  if (flags & PTHDB_FLAG_GPRS)
413
    {
414
      if (arch64)
415
        ptrace64aix (PTT_WRITE_GPRS, tid,
416
                     (unsigned long) context->gpr, 0, NULL);
417
      else
418
        ptrace32 (PTT_WRITE_GPRS, tid, (int *) context->gpr, 0, NULL);
419
    }
420
 
421
 /* Floating-point registers.  */
422
  if (flags & PTHDB_FLAG_FPRS)
423
    {
424
      ptrace32 (PTT_WRITE_FPRS, tid, (int *) context->fpr, 0, NULL);
425
    }
426
 
427
  /* Special-purpose registers.  */
428
  if (flags & PTHDB_FLAG_SPRS)
429
    {
430
      if (arch64)
431
        {
432
          ptrace64aix (PTT_WRITE_SPRS, tid,
433
                       (unsigned long) &context->msr, 0, NULL);
434
        }
435
      else
436
        {
437
          ptrace32 (PTT_WRITE_SPRS, tid, (void *) &context->msr, 0, NULL);
438
        }
439
    }
440
  return 0;
441
}
442
 
443
/* pthdb callback: read LEN bytes from process ADDR into BUF.  */
444
 
445
static int
446
pdc_read_data (pthdb_user_t user, void *buf,
447
               pthdb_addr_t addr, size_t len)
448
{
449
  int status, ret;
450
 
451
  if (debug_aix_thread)
452
    fprintf_unfiltered (gdb_stdlog,
453
      "pdc_read_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n",
454
      user, (long) buf, hex_string (addr), len);
455
 
456
  status = target_read_memory (addr, buf, len);
457
  ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE;
458
 
459
  if (debug_aix_thread)
460
    fprintf_unfiltered (gdb_stdlog, "  status=%d, returning %s\n",
461
                        status, pd_status2str (ret));
462
  return ret;
463
}
464
 
465
/* pthdb callback: write LEN bytes from BUF to process ADDR.  */
466
 
467
static int
468
pdc_write_data (pthdb_user_t user, void *buf,
469
                pthdb_addr_t addr, size_t len)
470
{
471
  int status, ret;
472
 
473
  if (debug_aix_thread)
474
    fprintf_unfiltered (gdb_stdlog,
475
      "pdc_write_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n",
476
      user, (long) buf, hex_string (addr), len);
477
 
478
  status = target_write_memory (addr, buf, len);
479
  ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE;
480
 
481
  if (debug_aix_thread)
482
    fprintf_unfiltered (gdb_stdlog, "  status=%d, returning %s\n", status,
483
                        pd_status2str (ret));
484
  return ret;
485
}
486
 
487
/* pthdb callback: allocate a LEN-byte buffer and store a pointer to it
488
   in BUFP.  */
489
 
490
static int
491
pdc_alloc (pthdb_user_t user, size_t len, void **bufp)
492
{
493
  if (debug_aix_thread)
494
    fprintf_unfiltered (gdb_stdlog,
495
                        "pdc_alloc (user = %ld, len = %ld, bufp = 0x%lx)\n",
496
                        user, len, (long) bufp);
497
  *bufp = xmalloc (len);
498
  if (debug_aix_thread)
499
    fprintf_unfiltered (gdb_stdlog,
500
                        "  malloc returned 0x%lx\n", (long) *bufp);
501
 
502
  /* Note: xmalloc() can't return 0; therefore PDC_FAILURE will never
503
     be returned.  */
504
 
505
  return *bufp ? PDC_SUCCESS : PDC_FAILURE;
506
}
507
 
508
/* pthdb callback: reallocate BUF, which was allocated by the alloc or
509
   realloc callback, so that it contains LEN bytes, and store a
510
   pointer to the result in BUFP.  */
511
 
512
static int
513
pdc_realloc (pthdb_user_t user, void *buf, size_t len, void **bufp)
514
{
515
  if (debug_aix_thread)
516
    fprintf_unfiltered (gdb_stdlog,
517
      "pdc_realloc (user = %ld, buf = 0x%lx, len = %ld, bufp = 0x%lx)\n",
518
      user, (long) buf, len, (long) bufp);
519
  *bufp = xrealloc (buf, len);
520
  if (debug_aix_thread)
521
    fprintf_unfiltered (gdb_stdlog,
522
                        "  realloc returned 0x%lx\n", (long) *bufp);
523
  return *bufp ? PDC_SUCCESS : PDC_FAILURE;
524
}
525
 
526
/* pthdb callback: free BUF, which was allocated by the alloc or
527
   realloc callback.  */
528
 
529
static int
530
pdc_dealloc (pthdb_user_t user, void *buf)
531
{
532
  if (debug_aix_thread)
533
    fprintf_unfiltered (gdb_stdlog,
534
                        "pdc_free (user = %ld, buf = 0x%lx)\n", user,
535
                        (long) buf);
536
  xfree (buf);
537
  return PDC_SUCCESS;
538
}
539
 
540
/* Return a printable representation of pthread STATE.  */
541
 
542
static char *
543
state2str (pthdb_state_t state)
544
{
545
  switch (state)
546
    {
547
    case PST_IDLE:
548
      /* i18n: Like "Thread-Id %d, [state] idle" */
549
      return _("idle");      /* being created */
550
    case PST_RUN:
551
      /* i18n: Like "Thread-Id %d, [state] running" */
552
      return _("running");   /* running */
553
    case PST_SLEEP:
554
      /* i18n: Like "Thread-Id %d, [state] sleeping" */
555
      return _("sleeping");  /* awaiting an event */
556
    case PST_READY:
557
      /* i18n: Like "Thread-Id %d, [state] ready" */
558
      return _("ready");     /* runnable */
559
    case PST_TERM:
560
      /* i18n: Like "Thread-Id %d, [state] finished" */
561
      return _("finished");  /* awaiting a join/detach */
562
    default:
563
      /* i18n: Like "Thread-Id %d, [state] unknown" */
564
      return _("unknown");
565
    }
566
}
567
 
568
/* qsort() comparison function for sorting pd_thread structs by pthid.  */
569
 
570
static int
571
pcmp (const void *p1v, const void *p2v)
572
{
573
  struct pd_thread *p1 = (struct pd_thread *) p1v;
574
  struct pd_thread *p2 = (struct pd_thread *) p2v;
575
  return p1->pthid < p2->pthid ? -1 : p1->pthid > p2->pthid;
576
}
577
 
578
/* iterate_over_threads() callback for counting GDB threads.  */
579
 
580
static int
581
giter_count (struct thread_info *thread, void *countp)
582
{
583
  (*(int *) countp)++;
584
  return 0;
585
}
586
 
587
/* iterate_over_threads() callback for accumulating GDB thread pids.  */
588
 
589
static int
590
giter_accum (struct thread_info *thread, void *bufp)
591
{
592
  **(struct thread_info ***) bufp = thread;
593
  (*(struct thread_info ***) bufp)++;
594
  return 0;
595
}
596
 
597
/* ptid comparison function */
598
 
599
static int
600
ptid_cmp (ptid_t ptid1, ptid_t ptid2)
601
{
602
  int pid1, pid2;
603
 
604
  if (ptid_get_pid (ptid1) < ptid_get_pid (ptid2))
605
    return -1;
606
  else if (ptid_get_pid (ptid1) > ptid_get_pid (ptid2))
607
    return 1;
608
  else if (ptid_get_tid (ptid1) < ptid_get_tid (ptid2))
609
    return -1;
610
  else if (ptid_get_tid (ptid1) > ptid_get_tid (ptid2))
611
    return 1;
612
  else if (ptid_get_lwp (ptid1) < ptid_get_lwp (ptid2))
613
    return -1;
614
  else if (ptid_get_lwp (ptid1) > ptid_get_lwp (ptid2))
615
    return 1;
616
  else
617
    return 0;
618
}
619
 
620
/* qsort() comparison function for sorting thread_info structs by pid.  */
621
 
622
static int
623
gcmp (const void *t1v, const void *t2v)
624
{
625
  struct thread_info *t1 = *(struct thread_info **) t1v;
626
  struct thread_info *t2 = *(struct thread_info **) t2v;
627
  return ptid_cmp (t1->ptid, t2->ptid);
628
}
629
 
630
/* Search through the list of all kernel threads for the thread
631
   that has stopped on a SIGTRAP signal, and return its TID.
632
   Return 0 if none found.  */
633
 
634
static pthdb_tid_t
635
get_signaled_thread (void)
636
{
637
  struct thrdsinfo64 thrinf;
638
  pthdb_tid_t ktid = 0;
639
  int result = 0;
640
 
641
  /* getthrds(3) isn't prototyped in any AIX 4.3.3 #include file.  */
642
  extern int getthrds (pid_t, struct thrdsinfo64 *,
643
                       int, pthdb_tid_t *, int);
644
 
645
  while (1)
646
  {
647
    if (getthrds (PIDGET (inferior_ptid), &thrinf,
648
                  sizeof (thrinf), &ktid, 1) != 1)
649
      break;
650
 
651
    if (thrinf.ti_cursig == SIGTRAP)
652
      return thrinf.ti_tid;
653
  }
654
 
655
  /* Didn't find any thread stopped on a SIGTRAP signal.  */
656
  return 0;
657
}
658
 
659
/* Synchronize GDB's thread list with libpthdebug's.
660
 
661
   There are some benefits of doing this every time the inferior stops:
662
 
663
     - allows users to run thread-specific commands without needing to
664
       run "info threads" first
665
 
666
     - helps pthdb_tid_pthread() work properly (see "libpthdebug
667
       peculiarities" at the top of this module)
668
 
669
     - simplifies the demands placed on libpthdebug, which seems to
670
       have difficulty with certain call patterns */
671
 
672
static void
673
sync_threadlists (void)
674
{
675
  int cmd, status, infpid;
676
  int pcount, psize, pi, gcount, gi;
677
  struct pd_thread *pbuf;
678
  struct thread_info **gbuf, **g, *thread;
679
  pthdb_pthread_t pdtid;
680
  pthread_t pthid;
681
  pthdb_tid_t tid;
682
 
683
  /* Accumulate an array of libpthdebug threads sorted by pthread id.  */
684
 
685
  pcount = 0;
686
  psize = 1;
687
  pbuf = (struct pd_thread *) xmalloc (psize * sizeof *pbuf);
688
 
689
  for (cmd = PTHDB_LIST_FIRST;; cmd = PTHDB_LIST_NEXT)
690
    {
691
      status = pthdb_pthread (pd_session, &pdtid, cmd);
692
      if (status != PTHDB_SUCCESS || pdtid == PTHDB_INVALID_PTHREAD)
693
        break;
694
 
695
      status = pthdb_pthread_ptid (pd_session, pdtid, &pthid);
696
      if (status != PTHDB_SUCCESS || pthid == PTHDB_INVALID_PTID)
697
        continue;
698
 
699
      if (pcount == psize)
700
        {
701
          psize *= 2;
702
          pbuf = (struct pd_thread *) xrealloc (pbuf,
703
                                                psize * sizeof *pbuf);
704
        }
705
      pbuf[pcount].pdtid = pdtid;
706
      pbuf[pcount].pthid = pthid;
707
      pcount++;
708
    }
709
 
710
  for (pi = 0; pi < pcount; pi++)
711
    {
712
      status = pthdb_pthread_tid (pd_session, pbuf[pi].pdtid, &tid);
713
      if (status != PTHDB_SUCCESS)
714
        tid = PTHDB_INVALID_TID;
715
      pbuf[pi].tid = tid;
716
    }
717
 
718
  qsort (pbuf, pcount, sizeof *pbuf, pcmp);
719
 
720
  /* Accumulate an array of GDB threads sorted by pid.  */
721
 
722
  gcount = 0;
723
  iterate_over_threads (giter_count, &gcount);
724
  g = gbuf = (struct thread_info **) xmalloc (gcount * sizeof *gbuf);
725
  iterate_over_threads (giter_accum, &g);
726
  qsort (gbuf, gcount, sizeof *gbuf, gcmp);
727
 
728
  /* Apply differences between the two arrays to GDB's thread list.  */
729
 
730
  infpid = PIDGET (inferior_ptid);
731
  for (pi = gi = 0; pi < pcount || gi < gcount;)
732
    {
733
      if (pi == pcount)
734
        {
735
          delete_thread (gbuf[gi]->ptid);
736
          gi++;
737
        }
738
      else if (gi == gcount)
739
        {
740
          thread = add_thread (BUILD_THREAD (pbuf[pi].pthid, infpid));
741
          thread->private = xmalloc (sizeof (struct private_thread_info));
742
          thread->private->pdtid = pbuf[pi].pdtid;
743
          thread->private->tid = pbuf[pi].tid;
744
          pi++;
745
        }
746
      else
747
        {
748
          ptid_t pptid, gptid;
749
          int cmp_result;
750
 
751
          pptid = BUILD_THREAD (pbuf[pi].pthid, infpid);
752
          gptid = gbuf[gi]->ptid;
753
          pdtid = pbuf[pi].pdtid;
754
          tid = pbuf[pi].tid;
755
 
756
          cmp_result = ptid_cmp (pptid, gptid);
757
 
758
          if (cmp_result == 0)
759
            {
760
              gbuf[gi]->private->pdtid = pdtid;
761
              gbuf[gi]->private->tid = tid;
762
              pi++;
763
              gi++;
764
            }
765
          else if (cmp_result > 0)
766
            {
767
              delete_thread (gptid);
768
              gi++;
769
            }
770
          else
771
            {
772
              thread = add_thread (pptid);
773
              thread->private = xmalloc (sizeof (struct private_thread_info));
774
              thread->private->pdtid = pdtid;
775
              thread->private->tid = tid;
776
              pi++;
777
            }
778
        }
779
    }
780
 
781
  xfree (pbuf);
782
  xfree (gbuf);
783
}
784
 
785
/* Iterate_over_threads() callback for locating a thread, using
786
   the TID of its associated kernel thread.  */
787
 
788
static int
789
iter_tid (struct thread_info *thread, void *tidp)
790
{
791
  const pthdb_tid_t tid = *(pthdb_tid_t *)tidp;
792
 
793
  return (thread->private->tid == tid);
794
}
795
 
796
/* Synchronize libpthdebug's state with the inferior and with GDB,
797
   generate a composite process/thread <pid> for the current thread,
798
   set inferior_ptid to <pid> if SET_INFPID, and return <pid>.  */
799
 
800
static ptid_t
801
pd_update (int set_infpid)
802
{
803
  int status;
804
  ptid_t ptid;
805
  pthdb_tid_t tid;
806
  struct thread_info *thread = NULL;
807
 
808
  if (!pd_active)
809
    return inferior_ptid;
810
 
811
  status = pthdb_session_update (pd_session);
812
  if (status != PTHDB_SUCCESS)
813
    return inferior_ptid;
814
 
815
  sync_threadlists ();
816
 
817
  /* Define "current thread" as one that just received a trap signal.  */
818
 
819
  tid = get_signaled_thread ();
820
  if (tid != 0)
821
    thread = iterate_over_threads (iter_tid, &tid);
822
  if (!thread)
823
    ptid = inferior_ptid;
824
  else
825
    {
826
      ptid = thread->ptid;
827
      if (set_infpid)
828
        inferior_ptid = ptid;
829
    }
830
  return ptid;
831
}
832
 
833
/* Try to start debugging threads in the current process.
834
   If successful and SET_INFPID, set inferior_ptid to reflect the
835
   current thread.  */
836
 
837
static ptid_t
838
pd_activate (int set_infpid)
839
{
840
  int status;
841
 
842
  status = pthdb_session_init (PD_USER, arch64 ? PEM_64BIT : PEM_32BIT,
843
                               PTHDB_FLAG_REGS, &pd_callbacks,
844
                               &pd_session);
845
  if (status != PTHDB_SUCCESS)
846
    {
847
      return inferior_ptid;
848
    }
849
  pd_active = 1;
850
  return pd_update (set_infpid);
851
}
852
 
853
/* Undo the effects of pd_activate().  */
854
 
855
static void
856
pd_deactivate (void)
857
{
858
  if (!pd_active)
859
    return;
860
  pthdb_session_destroy (pd_session);
861
 
862
  pid_to_prc (&inferior_ptid);
863
  pd_active = 0;
864
}
865
 
866
/* An object file has just been loaded.  Check whether the current
867
   application is pthreaded, and if so, prepare for thread debugging.  */
868
 
869
static void
870
pd_enable (void)
871
{
872
  int status;
873
  char *stub_name;
874
  struct minimal_symbol *ms;
875
 
876
  /* Don't initialize twice.  */
877
  if (pd_able)
878
    return;
879
 
880
  /* Check application word size.  */
881
  arch64 = register_size (current_gdbarch, 0) == 8;
882
 
883
  /* Check whether the application is pthreaded.  */
884
  stub_name = NULL;
885
  status = pthdb_session_pthreaded (PD_USER, PTHDB_FLAG_REGS,
886
                                    &pd_callbacks, &stub_name);
887
  if ((status != PTHDB_SUCCESS &&
888
       status != PTHDB_NOT_PTHREADED) || !stub_name)
889
    return;
890
 
891
  /* Set a breakpoint on the returned stub function.  */
892
  if (!(ms = lookup_minimal_symbol (stub_name, NULL, NULL)))
893
    return;
894
  pd_brk_addr = SYMBOL_VALUE_ADDRESS (ms);
895
  if (!create_thread_event_breakpoint (pd_brk_addr))
896
    return;
897
 
898
  /* Prepare for thread debugging.  */
899
  base_target = current_target;
900
  push_target (&aix_thread_ops);
901
  pd_able = 1;
902
 
903
  /* If we're debugging a core file or an attached inferior, the
904
     pthread library may already have been initialized, so try to
905
     activate thread debugging.  */
906
  pd_activate (1);
907
}
908
 
909
/* Undo the effects of pd_enable().  */
910
 
911
static void
912
pd_disable (void)
913
{
914
  if (!pd_able)
915
    return;
916
  if (pd_active)
917
    pd_deactivate ();
918
  pd_able = 0;
919
  unpush_target (&aix_thread_ops);
920
}
921
 
922
/* new_objfile observer callback.
923
 
924
   If OBJFILE is non-null, check whether a threaded application is
925
   being debugged, and if so, prepare for thread debugging.
926
 
927
   If OBJFILE is null, stop debugging threads.  */
928
 
929
static void
930
new_objfile (struct objfile *objfile)
931
{
932
  if (objfile)
933
    pd_enable ();
934
  else
935
    pd_disable ();
936
}
937
 
938
/* Attach to process specified by ARGS.  */
939
 
940
static void
941
aix_thread_attach (char *args, int from_tty)
942
{
943
  base_target.to_attach (args, from_tty);
944
  pd_activate (1);
945
}
946
 
947
/* Detach from the process attached to by aix_thread_attach().  */
948
 
949
static void
950
aix_thread_detach (char *args, int from_tty)
951
{
952
  pd_disable ();
953
  base_target.to_detach (args, from_tty);
954
}
955
 
956
/* Tell the inferior process to continue running thread PID if != -1
957
   and all threads otherwise.  */
958
 
959
static void
960
aix_thread_resume (ptid_t ptid, int step, enum target_signal sig)
961
{
962
  struct thread_info *thread;
963
  pthdb_tid_t tid[2];
964
 
965
  if (!PD_TID (ptid))
966
    {
967
      struct cleanup *cleanup = save_inferior_ptid ();
968
      inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid));
969
      base_target.to_resume (ptid, step, sig);
970
      do_cleanups (cleanup);
971
    }
972
  else
973
    {
974
      thread = find_thread_pid (ptid);
975
      if (!thread)
976
        error (_("aix-thread resume: unknown pthread %ld"),
977
               TIDGET (ptid));
978
 
979
      tid[0] = thread->private->tid;
980
      if (tid[0] == PTHDB_INVALID_TID)
981
        error (_("aix-thread resume: no tid for pthread %ld"),
982
               TIDGET (ptid));
983
      tid[1] = 0;
984
 
985
      if (arch64)
986
        ptrace64aix (PTT_CONTINUE, tid[0], 1,
987
                     target_signal_to_host (sig), (void *) tid);
988
      else
989
        ptrace32 (PTT_CONTINUE, tid[0], (int *) 1,
990
                  target_signal_to_host (sig), (void *) tid);
991
    }
992
}
993
 
994
/* Wait for thread/process ID if != -1 or for any thread otherwise.
995
   If an error occurs, return -1, else return the pid of the stopped
996
   thread.  */
997
 
998
static ptid_t
999
aix_thread_wait (ptid_t ptid, struct target_waitstatus *status)
1000
{
1001
  struct cleanup *cleanup = save_inferior_ptid ();
1002
 
1003
  pid_to_prc (&ptid);
1004
 
1005
  inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid));
1006
  ptid = base_target.to_wait (ptid, status);
1007
  do_cleanups (cleanup);
1008
 
1009
  if (PIDGET (ptid) == -1)
1010
    return pid_to_ptid (-1);
1011
 
1012
  /* Check whether libpthdebug might be ready to be initialized.  */
1013
  if (!pd_active && status->kind == TARGET_WAITKIND_STOPPED &&
1014
      status->value.sig == TARGET_SIGNAL_TRAP
1015
      && read_pc_pid (ptid)
1016
         - gdbarch_decr_pc_after_break (current_gdbarch) == pd_brk_addr)
1017
    return pd_activate (0);
1018
 
1019
  return pd_update (0);
1020
}
1021
 
1022
/* Record that the 64-bit general-purpose registers contain VALS.  */
1023
 
1024
static void
1025
supply_gprs64 (struct regcache *regcache, uint64_t *vals)
1026
{
1027
  struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
1028
  int regno;
1029
 
1030
  for (regno = 0; regno < ppc_num_gprs; regno++)
1031
    regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + regno,
1032
                         (char *) (vals + regno));
1033
}
1034
 
1035
/* Record that 32-bit register REGNO contains VAL.  */
1036
 
1037
static void
1038
supply_reg32 (struct regcache *regcache, int regno, uint32_t val)
1039
{
1040
  regcache_raw_supply (regcache, regno, (char *) &val);
1041
}
1042
 
1043
/* Record that the floating-point registers contain VALS.  */
1044
 
1045
static void
1046
supply_fprs (struct regcache *regcache, double *vals)
1047
{
1048
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
1049
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1050
  int regno;
1051
 
1052
  /* This function should never be called on architectures without
1053
     floating-point registers.  */
1054
  gdb_assert (ppc_floating_point_unit_p (gdbarch));
1055
 
1056
  for (regno = 0; regno < ppc_num_fprs; regno++)
1057
    regcache_raw_supply (regcache, regno + tdep->ppc_fp0_regnum,
1058
                         (char *) (vals + regno));
1059
}
1060
 
1061
/* Predicate to test whether given register number is a "special" register.  */
1062
static int
1063
special_register_p (struct gdbarch *gdbarch, int regno)
1064
{
1065
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1066
 
1067
  return regno == gdbarch_pc_regnum (gdbarch)
1068
      || regno == tdep->ppc_ps_regnum
1069
      || regno == tdep->ppc_cr_regnum
1070
      || regno == tdep->ppc_lr_regnum
1071
      || regno == tdep->ppc_ctr_regnum
1072
      || regno == tdep->ppc_xer_regnum
1073
      || (tdep->ppc_fpscr_regnum >= 0 && regno == tdep->ppc_fpscr_regnum)
1074
      || (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum);
1075
}
1076
 
1077
 
1078
/* Record that the special registers contain the specified 64-bit and
1079
   32-bit values.  */
1080
 
1081
static void
1082
supply_sprs64 (struct regcache *regcache,
1083
               uint64_t iar, uint64_t msr, uint32_t cr,
1084
               uint64_t lr, uint64_t ctr, uint32_t xer,
1085
               uint32_t fpscr)
1086
{
1087
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
1088
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1089
 
1090
  regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch),
1091
                       (char *) &iar);
1092
  regcache_raw_supply (regcache, tdep->ppc_ps_regnum, (char *) &msr);
1093
  regcache_raw_supply (regcache, tdep->ppc_cr_regnum, (char *) &cr);
1094
  regcache_raw_supply (regcache, tdep->ppc_lr_regnum, (char *) &lr);
1095
  regcache_raw_supply (regcache, tdep->ppc_ctr_regnum, (char *) &ctr);
1096
  regcache_raw_supply (regcache, tdep->ppc_xer_regnum, (char *) &xer);
1097
  if (tdep->ppc_fpscr_regnum >= 0)
1098
    regcache_raw_supply (regcache, tdep->ppc_fpscr_regnum,
1099
                         (char *) &fpscr);
1100
}
1101
 
1102
/* Record that the special registers contain the specified 32-bit
1103
   values.  */
1104
 
1105
static void
1106
supply_sprs32 (struct regcache *regcache,
1107
               uint32_t iar, uint32_t msr, uint32_t cr,
1108
               uint32_t lr, uint32_t ctr, uint32_t xer,
1109
               uint32_t fpscr)
1110
{
1111
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
1112
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1113
 
1114
  regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch),
1115
                       (char *) &iar);
1116
  regcache_raw_supply (regcache, tdep->ppc_ps_regnum, (char *) &msr);
1117
  regcache_raw_supply (regcache, tdep->ppc_cr_regnum, (char *) &cr);
1118
  regcache_raw_supply (regcache, tdep->ppc_lr_regnum, (char *) &lr);
1119
  regcache_raw_supply (regcache, tdep->ppc_ctr_regnum, (char *) &ctr);
1120
  regcache_raw_supply (regcache, tdep->ppc_xer_regnum, (char *) &xer);
1121
  if (tdep->ppc_fpscr_regnum >= 0)
1122
    regcache_raw_supply (regcache, tdep->ppc_fpscr_regnum,
1123
                         (char *) &fpscr);
1124
}
1125
 
1126
/* Fetch all registers from pthread PDTID, which doesn't have a kernel
1127
   thread.
1128
 
1129
   There's no way to query a single register from a non-kernel
1130
   pthread, so there's no need for a single-register version of this
1131
   function.  */
1132
 
1133
static void
1134
fetch_regs_user_thread (struct regcache *regcache, pthdb_pthread_t pdtid)
1135
{
1136
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
1137
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1138
  int status, i;
1139
  pthdb_context_t ctx;
1140
 
1141
  if (debug_aix_thread)
1142
    fprintf_unfiltered (gdb_stdlog,
1143
                        "fetch_regs_user_thread %lx\n", (long) pdtid);
1144
  status = pthdb_pthread_context (pd_session, pdtid, &ctx);
1145
  if (status != PTHDB_SUCCESS)
1146
    error (_("aix-thread: fetch_registers: pthdb_pthread_context returned %s"),
1147
           pd_status2str (status));
1148
 
1149
  /* General-purpose registers.  */
1150
 
1151
  if (arch64)
1152
    supply_gprs64 (regcache, ctx.gpr);
1153
  else
1154
    for (i = 0; i < ppc_num_gprs; i++)
1155
      supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, ctx.gpr[i]);
1156
 
1157
  /* Floating-point registers.  */
1158
 
1159
  if (ppc_floating_point_unit_p (gdbarch))
1160
    supply_fprs (regcache, ctx.fpr);
1161
 
1162
  /* Special registers.  */
1163
 
1164
  if (arch64)
1165
    supply_sprs64 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr,
1166
                             ctx.xer, ctx.fpscr);
1167
  else
1168
    supply_sprs32 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr,
1169
                             ctx.xer, ctx.fpscr);
1170
}
1171
 
1172
/* Fetch register REGNO if != -1 or all registers otherwise from
1173
   kernel thread TID.
1174
 
1175
   AIX provides a way to query all of a kernel thread's GPRs, FPRs, or
1176
   SPRs, but there's no way to query individual registers within those
1177
   groups.  Therefore, if REGNO != -1, this function fetches an entire
1178
   group.
1179
 
1180
   Unfortunately, kernel thread register queries often fail with
1181
   EPERM, indicating that the thread is in kernel space.  This breaks
1182
   backtraces of threads other than the current one.  To make that
1183
   breakage obvious without throwing an error to top level (which is
1184
   bad e.g. during "info threads" output), zero registers that can't
1185
   be retrieved.  */
1186
 
1187
static void
1188
fetch_regs_kernel_thread (struct regcache *regcache, int regno,
1189
                          pthdb_tid_t tid)
1190
{
1191
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
1192
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1193
  uint64_t gprs64[ppc_num_gprs];
1194
  uint32_t gprs32[ppc_num_gprs];
1195
  double fprs[ppc_num_fprs];
1196
  struct ptxsprs sprs64;
1197
  struct ptsprs sprs32;
1198
  int i;
1199
 
1200
  if (debug_aix_thread)
1201
    fprintf_unfiltered (gdb_stdlog,
1202
        "fetch_regs_kernel_thread tid=%lx regno=%d arch64=%d\n",
1203
        (long) tid, regno, arch64);
1204
 
1205
  /* General-purpose registers.  */
1206
  if (regno == -1
1207
      || (tdep->ppc_gp0_regnum <= regno
1208
          && regno < tdep->ppc_gp0_regnum + ppc_num_gprs))
1209
    {
1210
      if (arch64)
1211
        {
1212
          if (!ptrace64aix (PTT_READ_GPRS, tid,
1213
                            (unsigned long) gprs64, 0, NULL))
1214
            memset (gprs64, 0, sizeof (gprs64));
1215
          supply_gprs64 (regcache, gprs64);
1216
        }
1217
      else
1218
        {
1219
          if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL))
1220
            memset (gprs32, 0, sizeof (gprs32));
1221
          for (i = 0; i < ppc_num_gprs; i++)
1222
            supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, gprs32[i]);
1223
        }
1224
    }
1225
 
1226
  /* Floating-point registers.  */
1227
 
1228
  if (ppc_floating_point_unit_p (gdbarch)
1229
      && (regno == -1
1230
          || (regno >= tdep->ppc_fp0_regnum
1231
              && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)))
1232
    {
1233
      if (!ptrace32 (PTT_READ_FPRS, tid, (void *) fprs, 0, NULL))
1234
        memset (fprs, 0, sizeof (fprs));
1235
      supply_fprs (regcache, fprs);
1236
    }
1237
 
1238
  /* Special-purpose registers.  */
1239
 
1240
  if (regno == -1 || special_register_p (gdbarch, regno))
1241
    {
1242
      if (arch64)
1243
        {
1244
          if (!ptrace64aix (PTT_READ_SPRS, tid,
1245
                            (unsigned long) &sprs64, 0, NULL))
1246
            memset (&sprs64, 0, sizeof (sprs64));
1247
          supply_sprs64 (regcache, sprs64.pt_iar, sprs64.pt_msr,
1248
                         sprs64.pt_cr, sprs64.pt_lr, sprs64.pt_ctr,
1249
                         sprs64.pt_xer, sprs64.pt_fpscr);
1250
        }
1251
      else
1252
        {
1253
          struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1254
 
1255
          if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL))
1256
            memset (&sprs32, 0, sizeof (sprs32));
1257
          supply_sprs32 (regcache, sprs32.pt_iar, sprs32.pt_msr, sprs32.pt_cr,
1258
                         sprs32.pt_lr, sprs32.pt_ctr, sprs32.pt_xer,
1259
                         sprs32.pt_fpscr);
1260
 
1261
          if (tdep->ppc_mq_regnum >= 0)
1262
            regcache_raw_supply (regcache, tdep->ppc_mq_regnum,
1263
                                 (char *) &sprs32.pt_mq);
1264
        }
1265
    }
1266
}
1267
 
1268
/* Fetch register REGNO if != -1 or all registers otherwise in the
1269
   thread/process specified by inferior_ptid.  */
1270
 
1271
static void
1272
aix_thread_fetch_registers (struct regcache *regcache, int regno)
1273
{
1274
  struct thread_info *thread;
1275
  pthdb_tid_t tid;
1276
 
1277
  if (!PD_TID (inferior_ptid))
1278
    base_target.to_fetch_registers (regcache, regno);
1279
  else
1280
    {
1281
      thread = find_thread_pid (inferior_ptid);
1282
      tid = thread->private->tid;
1283
 
1284
      if (tid == PTHDB_INVALID_TID)
1285
        fetch_regs_user_thread (regcache, thread->private->pdtid);
1286
      else
1287
        fetch_regs_kernel_thread (regcache, regno, tid);
1288
    }
1289
}
1290
 
1291
/* Store the gp registers into an array of uint32_t or uint64_t.  */
1292
 
1293
static void
1294
fill_gprs64 (const struct regcache *regcache, uint64_t *vals)
1295
{
1296
  struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
1297
  int regno;
1298
 
1299
  for (regno = 0; regno < ppc_num_gprs; regno++)
1300
    if (regcache_valid_p (regcache, tdep->ppc_gp0_regnum + regno))
1301
      regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + regno,
1302
                            vals + regno);
1303
}
1304
 
1305
static void
1306
fill_gprs32 (const struct regcache *regcache, uint32_t *vals)
1307
{
1308
  struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
1309
  int regno;
1310
 
1311
  for (regno = 0; regno < ppc_num_gprs; regno++)
1312
    if (regcache_valid_p (regcache, tdep->ppc_gp0_regnum + regno))
1313
      regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + regno,
1314
                            vals + regno);
1315
}
1316
 
1317
/* Store the floating point registers into a double array.  */
1318
static void
1319
fill_fprs (const struct regcache *regcache, double *vals)
1320
{
1321
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
1322
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1323
  int regno;
1324
 
1325
  /* This function should never be called on architectures without
1326
     floating-point registers.  */
1327
  gdb_assert (ppc_floating_point_unit_p (gdbarch));
1328
 
1329
  for (regno = tdep->ppc_fp0_regnum;
1330
       regno < tdep->ppc_fp0_regnum + ppc_num_fprs;
1331
       regno++)
1332
    if (regcache_valid_p (regcache, regno))
1333
      regcache_raw_collect (regcache, regno, vals + regno);
1334
}
1335
 
1336
/* Store the special registers into the specified 64-bit and 32-bit
1337
   locations.  */
1338
 
1339
static void
1340
fill_sprs64 (const struct regcache *regcache,
1341
             uint64_t *iar, uint64_t *msr, uint32_t *cr,
1342
             uint64_t *lr, uint64_t *ctr, uint32_t *xer,
1343
             uint32_t *fpscr)
1344
{
1345
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
1346
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1347
 
1348
  /* Verify that the size of the size of the IAR buffer is the
1349
     same as the raw size of the PC (in the register cache).  If
1350
     they're not, then either GDB has been built incorrectly, or
1351
     there's some other kind of internal error.  To be really safe,
1352
     we should check all of the sizes.   */
1353
  gdb_assert (sizeof (*iar) == register_size
1354
                                 (gdbarch, gdbarch_pc_regnum (gdbarch)));
1355
 
1356
  if (regcache_valid_p (regcache, gdbarch_pc_regnum (gdbarch)))
1357
    regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), iar);
1358
  if (regcache_valid_p (regcache, tdep->ppc_ps_regnum))
1359
    regcache_raw_collect (regcache, tdep->ppc_ps_regnum, msr);
1360
  if (regcache_valid_p (regcache, tdep->ppc_cr_regnum))
1361
    regcache_raw_collect (regcache, tdep->ppc_cr_regnum, cr);
1362
  if (regcache_valid_p (regcache, tdep->ppc_lr_regnum))
1363
    regcache_raw_collect (regcache, tdep->ppc_lr_regnum, lr);
1364
  if (regcache_valid_p (regcache, tdep->ppc_ctr_regnum))
1365
    regcache_raw_collect (regcache, tdep->ppc_ctr_regnum, ctr);
1366
  if (regcache_valid_p (regcache, tdep->ppc_xer_regnum))
1367
    regcache_raw_collect (regcache, tdep->ppc_xer_regnum, xer);
1368
  if (tdep->ppc_fpscr_regnum >= 0
1369
      && regcache_valid_p (regcache, tdep->ppc_fpscr_regnum))
1370
    regcache_raw_collect (regcache, tdep->ppc_fpscr_regnum, fpscr);
1371
}
1372
 
1373
static void
1374
fill_sprs32 (const struct regcache *regcache,
1375
             uint32_t *iar, uint32_t *msr, uint32_t *cr,
1376
             uint32_t *lr, uint32_t *ctr, uint32_t *xer,
1377
             uint32_t *fpscr)
1378
{
1379
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
1380
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1381
 
1382
  /* Verify that the size of the size of the IAR buffer is the
1383
     same as the raw size of the PC (in the register cache).  If
1384
     they're not, then either GDB has been built incorrectly, or
1385
     there's some other kind of internal error.  To be really safe,
1386
     we should check all of the sizes.  */
1387
  gdb_assert (sizeof (*iar) == register_size (gdbarch,
1388
                                              gdbarch_pc_regnum (gdbarch)));
1389
 
1390
  if (regcache_valid_p (regcache, gdbarch_pc_regnum (gdbarch)))
1391
    regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), iar);
1392
  if (regcache_valid_p (regcache, tdep->ppc_ps_regnum))
1393
    regcache_raw_collect (regcache, tdep->ppc_ps_regnum, msr);
1394
  if (regcache_valid_p (regcache, tdep->ppc_cr_regnum))
1395
    regcache_raw_collect (regcache, tdep->ppc_cr_regnum, cr);
1396
  if (regcache_valid_p (regcache, tdep->ppc_lr_regnum))
1397
    regcache_raw_collect (regcache, tdep->ppc_lr_regnum, lr);
1398
  if (regcache_valid_p (regcache, tdep->ppc_ctr_regnum))
1399
    regcache_raw_collect (regcache, tdep->ppc_ctr_regnum, ctr);
1400
  if (regcache_valid_p (regcache, tdep->ppc_xer_regnum))
1401
    regcache_raw_collect (regcache, tdep->ppc_xer_regnum, xer);
1402
  if (tdep->ppc_fpscr_regnum >= 0
1403
      && regcache_valid_p (regcache, tdep->ppc_fpscr_regnum))
1404
    regcache_raw_collect (regcache, tdep->ppc_fpscr_regnum, fpscr);
1405
}
1406
 
1407
/* Store all registers into pthread PDTID, which doesn't have a kernel
1408
   thread.
1409
 
1410
   It's possible to store a single register into a non-kernel pthread,
1411
   but I doubt it's worth the effort.  */
1412
 
1413
static void
1414
store_regs_user_thread (const struct regcache *regcache, pthdb_pthread_t pdtid)
1415
{
1416
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
1417
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1418
  int status, i;
1419
  pthdb_context_t ctx;
1420
  uint32_t int32;
1421
  uint64_t int64;
1422
  double   dbl;
1423
 
1424
  if (debug_aix_thread)
1425
    fprintf_unfiltered (gdb_stdlog,
1426
                        "store_regs_user_thread %lx\n", (long) pdtid);
1427
 
1428
  /* Retrieve the thread's current context for its non-register
1429
     values.  */
1430
  status = pthdb_pthread_context (pd_session, pdtid, &ctx);
1431
  if (status != PTHDB_SUCCESS)
1432
    error (_("aix-thread: store_registers: pthdb_pthread_context returned %s"),
1433
           pd_status2str (status));
1434
 
1435
  /* Collect general-purpose register values from the regcache.  */
1436
 
1437
  for (i = 0; i < ppc_num_gprs; i++)
1438
    if (regcache_valid_p (regcache, tdep->ppc_gp0_regnum + i))
1439
      {
1440
        if (arch64)
1441
          {
1442
            regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + i,
1443
                                  (void *) &int64);
1444
            ctx.gpr[i] = int64;
1445
          }
1446
        else
1447
          {
1448
            regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + i,
1449
                                  (void *) &int32);
1450
            ctx.gpr[i] = int32;
1451
          }
1452
      }
1453
 
1454
  /* Collect floating-point register values from the regcache.  */
1455
  if (ppc_floating_point_unit_p (gdbarch))
1456
    fill_fprs (regcache, ctx.fpr);
1457
 
1458
  /* Special registers (always kept in ctx as 64 bits).  */
1459
  if (arch64)
1460
    {
1461
      fill_sprs64 (regcache, &ctx.iar, &ctx.msr, &ctx.cr, &ctx.lr, &ctx.ctr,
1462
                             &ctx.xer, &ctx.fpscr);
1463
    }
1464
  else
1465
    {
1466
      /* Problem: ctx.iar etc. are 64 bits, but raw_registers are 32.
1467
         Solution: use 32-bit temp variables.  */
1468
      uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer,
1469
               tmp_fpscr;
1470
 
1471
      fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr, &tmp_ctr,
1472
                             &tmp_xer, &tmp_fpscr);
1473
      if (regcache_valid_p (regcache, gdbarch_pc_regnum (gdbarch)))
1474
        ctx.iar = tmp_iar;
1475
      if (regcache_valid_p (regcache, tdep->ppc_ps_regnum))
1476
        ctx.msr = tmp_msr;
1477
      if (regcache_valid_p (regcache, tdep->ppc_cr_regnum))
1478
        ctx.cr  = tmp_cr;
1479
      if (regcache_valid_p (regcache, tdep->ppc_lr_regnum))
1480
        ctx.lr  = tmp_lr;
1481
      if (regcache_valid_p (regcache, tdep->ppc_ctr_regnum))
1482
        ctx.ctr = tmp_ctr;
1483
      if (regcache_valid_p (regcache, tdep->ppc_xer_regnum))
1484
        ctx.xer = tmp_xer;
1485
      if (regcache_valid_p (regcache, tdep->ppc_xer_regnum))
1486
        ctx.fpscr = tmp_fpscr;
1487
    }
1488
 
1489
  status = pthdb_pthread_setcontext (pd_session, pdtid, &ctx);
1490
  if (status != PTHDB_SUCCESS)
1491
    error (_("aix-thread: store_registers: pthdb_pthread_setcontext returned %s"),
1492
           pd_status2str (status));
1493
}
1494
 
1495
/* Store register REGNO if != -1 or all registers otherwise into
1496
   kernel thread TID.
1497
 
1498
   AIX provides a way to set all of a kernel thread's GPRs, FPRs, or
1499
   SPRs, but there's no way to set individual registers within those
1500
   groups.  Therefore, if REGNO != -1, this function stores an entire
1501
   group.  */
1502
 
1503
static void
1504
store_regs_kernel_thread (const struct regcache *regcache, int regno,
1505
                          pthdb_tid_t tid)
1506
{
1507
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
1508
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1509
  uint64_t gprs64[ppc_num_gprs];
1510
  uint32_t gprs32[ppc_num_gprs];
1511
  double fprs[ppc_num_fprs];
1512
  struct ptxsprs sprs64;
1513
  struct ptsprs  sprs32;
1514
  int i;
1515
 
1516
  if (debug_aix_thread)
1517
    fprintf_unfiltered (gdb_stdlog,
1518
                        "store_regs_kernel_thread tid=%lx regno=%d\n",
1519
                        (long) tid, regno);
1520
 
1521
  /* General-purpose registers.  */
1522
  if (regno == -1
1523
      || (tdep->ppc_gp0_regnum <= regno
1524
          && regno < tdep->ppc_gp0_regnum + ppc_num_fprs))
1525
    {
1526
      if (arch64)
1527
        {
1528
          /* Pre-fetch: some regs may not be in the cache.  */
1529
          ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL);
1530
          fill_gprs64 (regcache, gprs64);
1531
          ptrace64aix (PTT_WRITE_GPRS, tid, (unsigned long) gprs64, 0, NULL);
1532
        }
1533
      else
1534
        {
1535
          /* Pre-fetch: some regs may not be in the cache.  */
1536
          ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL);
1537
          fill_gprs32 (regcache, gprs32);
1538
          ptrace32 (PTT_WRITE_GPRS, tid, gprs32, 0, NULL);
1539
        }
1540
    }
1541
 
1542
  /* Floating-point registers.  */
1543
 
1544
  if (ppc_floating_point_unit_p (gdbarch)
1545
      && (regno == -1
1546
          || (regno >= tdep->ppc_fp0_regnum
1547
              && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)))
1548
    {
1549
      /* Pre-fetch: some regs may not be in the cache.  */
1550
      ptrace32 (PTT_READ_FPRS, tid, (void *) fprs, 0, NULL);
1551
      fill_fprs (regcache, fprs);
1552
      ptrace32 (PTT_WRITE_FPRS, tid, (void *) fprs, 0, NULL);
1553
    }
1554
 
1555
  /* Special-purpose registers.  */
1556
 
1557
  if (regno == -1 || special_register_p (gdbarch, regno))
1558
    {
1559
      if (arch64)
1560
        {
1561
          /* Pre-fetch: some registers won't be in the cache.  */
1562
          ptrace64aix (PTT_READ_SPRS, tid,
1563
                       (unsigned long) &sprs64, 0, NULL);
1564
          fill_sprs64 (regcache, &sprs64.pt_iar, &sprs64.pt_msr,
1565
                       &sprs64.pt_cr, &sprs64.pt_lr, &sprs64.pt_ctr,
1566
                       &sprs64.pt_xer, &sprs64.pt_fpscr);
1567
          ptrace64aix (PTT_WRITE_SPRS, tid,
1568
                       (unsigned long) &sprs64, 0, NULL);
1569
        }
1570
      else
1571
        {
1572
          /* The contents of "struct ptspr" were declared as "unsigned
1573
             long" up to AIX 5.2, but are "unsigned int" since 5.3.
1574
             Use temporaries to work around this problem.  Also, add an
1575
             assert here to make sure we fail if the system header files
1576
             use "unsigned long", and the size of that type is not what
1577
             the headers expect.  */
1578
          uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer,
1579
                   tmp_fpscr;
1580
 
1581
          gdb_assert (sizeof (sprs32.pt_iar) == 4);
1582
 
1583
          /* Pre-fetch: some registers won't be in the cache.  */
1584
          ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL);
1585
 
1586
          fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr,
1587
                       &tmp_ctr, &tmp_xer, &tmp_fpscr);
1588
 
1589
          sprs32.pt_iar = tmp_iar;
1590
          sprs32.pt_msr = tmp_msr;
1591
          sprs32.pt_cr = tmp_cr;
1592
          sprs32.pt_lr = tmp_lr;
1593
          sprs32.pt_ctr = tmp_ctr;
1594
          sprs32.pt_xer = tmp_xer;
1595
          sprs32.pt_fpscr = tmp_fpscr;
1596
 
1597
          if (tdep->ppc_mq_regnum >= 0)
1598
            if (regcache_valid_p (regcache, tdep->ppc_mq_regnum))
1599
              regcache_raw_collect (regcache, tdep->ppc_mq_regnum,
1600
                                    &sprs32.pt_mq);
1601
 
1602
          ptrace32 (PTT_WRITE_SPRS, tid, (int *) &sprs32, 0, NULL);
1603
        }
1604
    }
1605
}
1606
 
1607
/* Store gdb's current view of the register set into the
1608
   thread/process specified by inferior_ptid.  */
1609
 
1610
static void
1611
aix_thread_store_registers (struct regcache *regcache, int regno)
1612
{
1613
  struct thread_info *thread;
1614
  pthdb_tid_t tid;
1615
 
1616
  if (!PD_TID (inferior_ptid))
1617
    base_target.to_store_registers (regcache, regno);
1618
  else
1619
    {
1620
      thread = find_thread_pid (inferior_ptid);
1621
      tid = thread->private->tid;
1622
 
1623
      if (tid == PTHDB_INVALID_TID)
1624
        store_regs_user_thread (regcache, thread->private->pdtid);
1625
      else
1626
        store_regs_kernel_thread (regcache, regno, tid);
1627
    }
1628
}
1629
 
1630
/* Attempt a transfer all LEN bytes starting at OFFSET between the
1631
   inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer.
1632
   Return the number of bytes actually transferred.  */
1633
 
1634
static LONGEST
1635
aix_thread_xfer_partial (struct target_ops *ops, enum target_object object,
1636
                         const char *annex, gdb_byte *readbuf,
1637
                         const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1638
{
1639
  struct cleanup *old_chain = save_inferior_ptid ();
1640
  LONGEST xfer;
1641
 
1642
  inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid));
1643
  xfer = base_target.to_xfer_partial (ops, object, annex,
1644
                                      readbuf, writebuf, offset, len);
1645
 
1646
  do_cleanups (old_chain);
1647
  return xfer;
1648
}
1649
 
1650
/* Kill and forget about the inferior process.  */
1651
 
1652
static void
1653
aix_thread_kill (void)
1654
{
1655
  struct cleanup *cleanup = save_inferior_ptid ();
1656
 
1657
  inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid));
1658
  base_target.to_kill ();
1659
  do_cleanups (cleanup);
1660
}
1661
 
1662
/* Clean up after the inferior exits.  */
1663
 
1664
static void
1665
aix_thread_mourn_inferior (void)
1666
{
1667
  pd_deactivate ();
1668
  base_target.to_mourn_inferior ();
1669
}
1670
 
1671
/* Return whether thread PID is still valid.  */
1672
 
1673
static int
1674
aix_thread_thread_alive (ptid_t ptid)
1675
{
1676
  if (!PD_TID (ptid))
1677
    return base_target.to_thread_alive (ptid);
1678
 
1679
  /* We update the thread list every time the child stops, so all
1680
     valid threads should be in the thread list.  */
1681
  return in_thread_list (ptid);
1682
}
1683
 
1684
/* Return a printable representation of composite PID for use in
1685
   "info threads" output.  */
1686
 
1687
static char *
1688
aix_thread_pid_to_str (ptid_t ptid)
1689
{
1690
  static char *ret = NULL;
1691
 
1692
  if (!PD_TID (ptid))
1693
    return base_target.to_pid_to_str (ptid);
1694
 
1695
  /* Free previous return value; a new one will be allocated by
1696
     xstrprintf().  */
1697
  xfree (ret);
1698
 
1699
  ret = xstrprintf (_("Thread %ld"), ptid_get_tid (ptid));
1700
  return ret;
1701
}
1702
 
1703
/* Return a printable representation of extra information about
1704
   THREAD, for use in "info threads" output.  */
1705
 
1706
static char *
1707
aix_thread_extra_thread_info (struct thread_info *thread)
1708
{
1709
  struct ui_file *buf;
1710
  int status;
1711
  pthdb_pthread_t pdtid;
1712
  pthdb_tid_t tid;
1713
  pthdb_state_t state;
1714
  pthdb_suspendstate_t suspendstate;
1715
  pthdb_detachstate_t detachstate;
1716
  int cancelpend;
1717
  long length;
1718
  static char *ret = NULL;
1719
 
1720
  if (!PD_TID (thread->ptid))
1721
    return NULL;
1722
 
1723
  buf = mem_fileopen ();
1724
 
1725
  pdtid = thread->private->pdtid;
1726
  tid = thread->private->tid;
1727
 
1728
  if (tid != PTHDB_INVALID_TID)
1729
    /* i18n: Like "thread-identifier %d, [state] running, suspended" */
1730
    fprintf_unfiltered (buf, _("tid %d"), (int)tid);
1731
 
1732
  status = pthdb_pthread_state (pd_session, pdtid, &state);
1733
  if (status != PTHDB_SUCCESS)
1734
    state = PST_NOTSUP;
1735
  fprintf_unfiltered (buf, ", %s", state2str (state));
1736
 
1737
  status = pthdb_pthread_suspendstate (pd_session, pdtid,
1738
                                       &suspendstate);
1739
  if (status == PTHDB_SUCCESS && suspendstate == PSS_SUSPENDED)
1740
    /* i18n: Like "Thread-Id %d, [state] running, suspended" */
1741
    fprintf_unfiltered (buf, _(", suspended"));
1742
 
1743
  status = pthdb_pthread_detachstate (pd_session, pdtid,
1744
                                      &detachstate);
1745
  if (status == PTHDB_SUCCESS && detachstate == PDS_DETACHED)
1746
    /* i18n: Like "Thread-Id %d, [state] running, detached" */
1747
    fprintf_unfiltered (buf, _(", detached"));
1748
 
1749
  pthdb_pthread_cancelpend (pd_session, pdtid, &cancelpend);
1750
  if (status == PTHDB_SUCCESS && cancelpend)
1751
    /* i18n: Like "Thread-Id %d, [state] running, cancel pending" */
1752
    fprintf_unfiltered (buf, _(", cancel pending"));
1753
 
1754
  ui_file_write (buf, "", 1);
1755
 
1756
  xfree (ret);                  /* Free old buffer.  */
1757
 
1758
  ret = ui_file_xstrdup (buf, &length);
1759
  ui_file_delete (buf);
1760
 
1761
  return ret;
1762
}
1763
 
1764
/* Initialize target aix_thread_ops.  */
1765
 
1766
static void
1767
init_aix_thread_ops (void)
1768
{
1769
  aix_thread_ops.to_shortname          = "aix-threads";
1770
  aix_thread_ops.to_longname           = _("AIX pthread support");
1771
  aix_thread_ops.to_doc                = _("AIX pthread support");
1772
 
1773
  aix_thread_ops.to_attach             = aix_thread_attach;
1774
  aix_thread_ops.to_detach             = aix_thread_detach;
1775
  aix_thread_ops.to_resume             = aix_thread_resume;
1776
  aix_thread_ops.to_wait               = aix_thread_wait;
1777
  aix_thread_ops.to_fetch_registers    = aix_thread_fetch_registers;
1778
  aix_thread_ops.to_store_registers    = aix_thread_store_registers;
1779
  aix_thread_ops.to_xfer_partial       = aix_thread_xfer_partial;
1780
  /* No need for aix_thread_ops.to_create_inferior, because we activate thread
1781
     debugging when the inferior reaches pd_brk_addr.  */
1782
  aix_thread_ops.to_kill               = aix_thread_kill;
1783
  aix_thread_ops.to_mourn_inferior     = aix_thread_mourn_inferior;
1784
  aix_thread_ops.to_thread_alive       = aix_thread_thread_alive;
1785
  aix_thread_ops.to_pid_to_str         = aix_thread_pid_to_str;
1786
  aix_thread_ops.to_extra_thread_info  = aix_thread_extra_thread_info;
1787
  aix_thread_ops.to_stratum            = thread_stratum;
1788
  aix_thread_ops.to_magic              = OPS_MAGIC;
1789
}
1790
 
1791
/* Module startup initialization function, automagically called by
1792
   init.c.  */
1793
 
1794
void
1795
_initialize_aix_thread (void)
1796
{
1797
  init_aix_thread_ops ();
1798
  add_target (&aix_thread_ops);
1799
 
1800
  /* Notice when object files get loaded and unloaded.  */
1801
  observer_attach_new_objfile (new_objfile);
1802
 
1803
  add_setshow_boolean_cmd ("aix-thread", class_maintenance, &debug_aix_thread,
1804
                            _("Set debugging of AIX thread module."),
1805
                            _("Show debugging of AIX thread module."),
1806
                            _("Enables debugging output (used to debug GDB)."),
1807
                            NULL, NULL, /* FIXME: i18n: Debugging of AIX thread module is \"%d\".  */
1808
                            &setdebuglist, &showdebuglist);
1809
}

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