1 /* Low level interface for debugging AIX 4.3+ pthreads.
3 Copyright (C) 1999-2016 Free Software Foundation, Inc.
4 Written by Nick Duffek <nsd@redhat.com>.
6 This file is part of GDB.
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.
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.
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/>. */
22 /* This module uses the libpthdebug.a library provided by AIX 4.3+ for
23 debugging pthread applications.
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
30 libpthdebug peculiarities:
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.
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().
43 #include "gdbthread.h"
53 #include <sys/types.h>
54 #include <sys/ptrace.h>
57 #include <sys/pthdebug.h>
59 #if !HAVE_DECL_GETTHRDS
60 extern int getthrds (pid_t, struct thrdsinfo64 *, int, tid_t *, int);
63 /* Whether to emit debugging output. */
64 static int debug_aix_thread;
66 /* In AIX 5.1, functions use pthdb_tid_t instead of tid_t. */
67 #ifndef PTHDB_VERSION_3
68 #define pthdb_tid_t tid_t
71 /* Return whether to treat PID as a debuggable thread id. */
73 #define PD_TID(ptid) (pd_active && ptid_get_tid (ptid) != 0)
75 /* pthdb_user_t value that we pass to pthdb functions. 0 causes
76 PTHDB_BAD_USER errors, so use 1. */
80 /* Success and failure values returned by pthdb callbacks. */
82 #define PDC_SUCCESS PTHDB_SUCCESS
83 #define PDC_FAILURE PTHDB_CALLBACK
85 /* Private data attached to each element in GDB's thread list. */
87 struct private_thread_info {
88 pthdb_pthread_t pdtid; /* thread's libpthdebug id */
89 pthdb_tid_t tid; /* kernel thread id */
92 /* Information about a thread of which libpthdebug is aware. */
95 pthdb_pthread_t pdtid;
100 /* This module's target-specific operations, active while pd_able is true. */
102 static struct target_ops aix_thread_ops;
104 /* Address of the function that libpthread will call when libpthdebug
105 is ready to be initialized. */
107 static CORE_ADDR pd_brk_addr;
109 /* Whether the current application is debuggable by pthdb. */
111 static int pd_able = 0;
113 /* Whether a threaded application is being debugged. */
115 static int pd_active = 0;
117 /* Whether the current architecture is 64-bit.
118 Only valid when pd_able is true. */
122 /* Forward declarations for pthdb callbacks. */
124 static int pdc_symbol_addrs (pthdb_user_t, pthdb_symbol_t *, int);
125 static int pdc_read_data (pthdb_user_t, void *, pthdb_addr_t, size_t);
126 static int pdc_write_data (pthdb_user_t, void *, pthdb_addr_t, size_t);
127 static int pdc_read_regs (pthdb_user_t user, pthdb_tid_t tid,
128 unsigned long long flags,
129 pthdb_context_t *context);
130 static int pdc_write_regs (pthdb_user_t user, pthdb_tid_t tid,
131 unsigned long long flags,
132 pthdb_context_t *context);
133 static int pdc_alloc (pthdb_user_t, size_t, void **);
134 static int pdc_realloc (pthdb_user_t, void *, size_t, void **);
135 static int pdc_dealloc (pthdb_user_t, void *);
137 /* pthdb callbacks. */
139 static pthdb_callbacks_t pd_callbacks = {
151 /* Current pthdb session. */
153 static pthdb_session_t pd_session;
155 /* Return a printable representation of pthdebug function return
159 pd_status2str (int status)
163 case PTHDB_SUCCESS: return "SUCCESS";
164 case PTHDB_NOSYS: return "NOSYS";
165 case PTHDB_NOTSUP: return "NOTSUP";
166 case PTHDB_BAD_VERSION: return "BAD_VERSION";
167 case PTHDB_BAD_USER: return "BAD_USER";
168 case PTHDB_BAD_SESSION: return "BAD_SESSION";
169 case PTHDB_BAD_MODE: return "BAD_MODE";
170 case PTHDB_BAD_FLAGS: return "BAD_FLAGS";
171 case PTHDB_BAD_CALLBACK: return "BAD_CALLBACK";
172 case PTHDB_BAD_POINTER: return "BAD_POINTER";
173 case PTHDB_BAD_CMD: return "BAD_CMD";
174 case PTHDB_BAD_PTHREAD: return "BAD_PTHREAD";
175 case PTHDB_BAD_ATTR: return "BAD_ATTR";
176 case PTHDB_BAD_MUTEX: return "BAD_MUTEX";
177 case PTHDB_BAD_MUTEXATTR: return "BAD_MUTEXATTR";
178 case PTHDB_BAD_COND: return "BAD_COND";
179 case PTHDB_BAD_CONDATTR: return "BAD_CONDATTR";
180 case PTHDB_BAD_RWLOCK: return "BAD_RWLOCK";
181 case PTHDB_BAD_RWLOCKATTR: return "BAD_RWLOCKATTR";
182 case PTHDB_BAD_KEY: return "BAD_KEY";
183 case PTHDB_BAD_PTID: return "BAD_PTID";
184 case PTHDB_BAD_TID: return "BAD_TID";
185 case PTHDB_CALLBACK: return "CALLBACK";
186 case PTHDB_CONTEXT: return "CONTEXT";
187 case PTHDB_HELD: return "HELD";
188 case PTHDB_NOT_HELD: return "NOT_HELD";
189 case PTHDB_MEMORY: return "MEMORY";
190 case PTHDB_NOT_PTHREADED: return "NOT_PTHREADED";
191 case PTHDB_SYMBOL: return "SYMBOL";
192 case PTHDB_NOT_AVAIL: return "NOT_AVAIL";
193 case PTHDB_INTERNAL: return "INTERNAL";
194 default: return "UNKNOWN";
198 /* A call to ptrace(REQ, ID, ...) just returned RET. Check for
199 exceptional conditions and either return nonlocally or else return
200 1 for success and 0 for failure. */
203 ptrace_check (int req, int id, int ret)
205 if (ret == 0 && !errno)
208 /* According to ptrace(2), ptrace may fail with EPERM if "the
209 Identifier parameter corresponds to a kernel thread which is
210 stopped in kernel mode and whose computational state cannot be
211 read or written." This happens quite often with register reads. */
218 if (ret == -1 && errno == EPERM)
220 if (debug_aix_thread)
221 fprintf_unfiltered (gdb_stdlog,
222 "ptrace (%d, %d) = %d (errno = %d)\n",
223 req, id, ret, errno);
224 return ret == -1 ? 0 : 1;
228 error (_("aix-thread: ptrace (%d, %d) returned %d (errno = %d %s)"),
229 req, id, ret, errno, safe_strerror (errno));
230 return 0; /* Not reached. */
233 /* Call ptracex (REQ, ID, ADDR, DATA, BUF) or
234 ptrace64 (REQ, ID, ADDR, DATA, BUF) if HAVE_PTRACE64.
238 # define ptracex(request, pid, addr, data, buf) \
239 ptrace64 (request, pid, addr, data, buf)
243 ptrace64aix (int req, int id, long long addr, int data, int *buf)
246 return ptrace_check (req, id, ptracex (req, id, addr, data, buf));
249 /* Call ptrace (REQ, ID, ADDR, DATA, BUF) or
250 ptrace64 (REQ, ID, ADDR, DATA, BUF) if HAVE_PTRACE64.
254 # define ptrace(request, pid, addr, data, buf) \
255 ptrace64 (request, pid, addr, data, buf)
256 # define addr_ptr long long
258 # define addr_ptr int *
262 ptrace32 (int req, int id, addr_ptr addr, int data, int *buf)
265 return ptrace_check (req, id,
266 ptrace (req, id, addr, data, buf));
269 /* If *PIDP is a composite process/thread id, convert it to a
273 pid_to_prc (ptid_t *ptidp)
279 *ptidp = pid_to_ptid (ptid_get_pid (ptid));
282 /* pthdb callback: for <i> from 0 to COUNT, set SYMBOLS[<i>].addr to
283 the address of SYMBOLS[<i>].name. */
286 pdc_symbol_addrs (pthdb_user_t user, pthdb_symbol_t *symbols, int count)
288 struct bound_minimal_symbol ms;
292 if (debug_aix_thread)
293 fprintf_unfiltered (gdb_stdlog,
294 "pdc_symbol_addrs (user = %ld, symbols = 0x%lx, count = %d)\n",
295 user, (long) symbols, count);
297 for (i = 0; i < count; i++)
299 name = symbols[i].name;
300 if (debug_aix_thread)
301 fprintf_unfiltered (gdb_stdlog,
302 " symbols[%d].name = \"%s\"\n", i, name);
308 ms = lookup_minimal_symbol (name, NULL, NULL);
309 if (ms.minsym == NULL)
311 if (debug_aix_thread)
312 fprintf_unfiltered (gdb_stdlog, " returning PDC_FAILURE\n");
315 symbols[i].addr = BMSYMBOL_VALUE_ADDRESS (ms);
317 if (debug_aix_thread)
318 fprintf_unfiltered (gdb_stdlog, " symbols[%d].addr = %s\n",
319 i, hex_string (symbols[i].addr));
321 if (debug_aix_thread)
322 fprintf_unfiltered (gdb_stdlog, " returning PDC_SUCCESS\n");
326 /* Read registers call back function should be able to read the
327 context information of a debuggee kernel thread from an active
328 process or from a core file. The information should be formatted
329 in context64 form for both 32-bit and 64-bit process.
330 If successful return 0, else non-zero is returned. */
333 pdc_read_regs (pthdb_user_t user,
335 unsigned long long flags,
336 pthdb_context_t *context)
338 /* This function doesn't appear to be used, so we could probably
339 just return 0 here. HOWEVER, if it is not defined, the OS will
340 complain and several thread debug functions will fail. In case
341 this is needed, I have implemented what I think it should do,
342 however this code is untested. */
344 uint64_t gprs64[ppc_num_gprs];
345 uint32_t gprs32[ppc_num_gprs];
346 double fprs[ppc_num_fprs];
347 struct ptxsprs sprs64;
348 struct ptsprs sprs32;
350 if (debug_aix_thread)
351 fprintf_unfiltered (gdb_stdlog, "pdc_read_regs tid=%d flags=%s\n",
352 (int) tid, hex_string (flags));
354 /* General-purpose registers. */
355 if (flags & PTHDB_FLAG_GPRS)
359 if (!ptrace64aix (PTT_READ_GPRS, tid,
360 (unsigned long) gprs64, 0, NULL))
361 memset (gprs64, 0, sizeof (gprs64));
362 memcpy (context->gpr, gprs64, sizeof(gprs64));
366 if (!ptrace32 (PTT_READ_GPRS, tid, (uintptr_t) gprs32, 0, NULL))
367 memset (gprs32, 0, sizeof (gprs32));
368 memcpy (context->gpr, gprs32, sizeof(gprs32));
372 /* Floating-point registers. */
373 if (flags & PTHDB_FLAG_FPRS)
375 if (!ptrace32 (PTT_READ_FPRS, tid, (uintptr_t) fprs, 0, NULL))
376 memset (fprs, 0, sizeof (fprs));
377 memcpy (context->fpr, fprs, sizeof(fprs));
380 /* Special-purpose registers. */
381 if (flags & PTHDB_FLAG_SPRS)
385 if (!ptrace64aix (PTT_READ_SPRS, tid,
386 (unsigned long) &sprs64, 0, NULL))
387 memset (&sprs64, 0, sizeof (sprs64));
388 memcpy (&context->msr, &sprs64, sizeof(sprs64));
392 if (!ptrace32 (PTT_READ_SPRS, tid, (uintptr_t) &sprs32, 0, NULL))
393 memset (&sprs32, 0, sizeof (sprs32));
394 memcpy (&context->msr, &sprs32, sizeof(sprs32));
400 /* Write register function should be able to write requested context
401 information to specified debuggee's kernel thread id.
402 If successful return 0, else non-zero is returned. */
405 pdc_write_regs (pthdb_user_t user,
407 unsigned long long flags,
408 pthdb_context_t *context)
410 /* This function doesn't appear to be used, so we could probably
411 just return 0 here. HOWEVER, if it is not defined, the OS will
412 complain and several thread debug functions will fail. In case
413 this is needed, I have implemented what I think it should do,
414 however this code is untested. */
416 if (debug_aix_thread)
417 fprintf_unfiltered (gdb_stdlog, "pdc_write_regs tid=%d flags=%s\n",
418 (int) tid, hex_string (flags));
420 /* General-purpose registers. */
421 if (flags & PTHDB_FLAG_GPRS)
424 ptrace64aix (PTT_WRITE_GPRS, tid,
425 (unsigned long) context->gpr, 0, NULL);
427 ptrace32 (PTT_WRITE_GPRS, tid, (uintptr_t) context->gpr, 0, NULL);
430 /* Floating-point registers. */
431 if (flags & PTHDB_FLAG_FPRS)
433 ptrace32 (PTT_WRITE_FPRS, tid, (uintptr_t) context->fpr, 0, NULL);
436 /* Special-purpose registers. */
437 if (flags & PTHDB_FLAG_SPRS)
441 ptrace64aix (PTT_WRITE_SPRS, tid,
442 (unsigned long) &context->msr, 0, NULL);
446 ptrace32 (PTT_WRITE_SPRS, tid, (uintptr_t) &context->msr, 0, NULL);
452 /* pthdb callback: read LEN bytes from process ADDR into BUF. */
455 pdc_read_data (pthdb_user_t user, void *buf,
456 pthdb_addr_t addr, size_t len)
460 if (debug_aix_thread)
461 fprintf_unfiltered (gdb_stdlog,
462 "pdc_read_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n",
463 user, (long) buf, hex_string (addr), len);
465 status = target_read_memory (addr, buf, len);
466 ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE;
468 if (debug_aix_thread)
469 fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n",
470 status, pd_status2str (ret));
474 /* pthdb callback: write LEN bytes from BUF to process ADDR. */
477 pdc_write_data (pthdb_user_t user, void *buf,
478 pthdb_addr_t addr, size_t len)
482 if (debug_aix_thread)
483 fprintf_unfiltered (gdb_stdlog,
484 "pdc_write_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n",
485 user, (long) buf, hex_string (addr), len);
487 status = target_write_memory (addr, buf, len);
488 ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE;
490 if (debug_aix_thread)
491 fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", status,
492 pd_status2str (ret));
496 /* pthdb callback: allocate a LEN-byte buffer and store a pointer to it
500 pdc_alloc (pthdb_user_t user, size_t len, void **bufp)
502 if (debug_aix_thread)
503 fprintf_unfiltered (gdb_stdlog,
504 "pdc_alloc (user = %ld, len = %ld, bufp = 0x%lx)\n",
505 user, len, (long) bufp);
506 *bufp = xmalloc (len);
507 if (debug_aix_thread)
508 fprintf_unfiltered (gdb_stdlog,
509 " malloc returned 0x%lx\n", (long) *bufp);
511 /* Note: xmalloc() can't return 0; therefore PDC_FAILURE will never
514 return *bufp ? PDC_SUCCESS : PDC_FAILURE;
517 /* pthdb callback: reallocate BUF, which was allocated by the alloc or
518 realloc callback, so that it contains LEN bytes, and store a
519 pointer to the result in BUFP. */
522 pdc_realloc (pthdb_user_t user, void *buf, size_t len, void **bufp)
524 if (debug_aix_thread)
525 fprintf_unfiltered (gdb_stdlog,
526 "pdc_realloc (user = %ld, buf = 0x%lx, len = %ld, bufp = 0x%lx)\n",
527 user, (long) buf, len, (long) bufp);
528 *bufp = xrealloc (buf, len);
529 if (debug_aix_thread)
530 fprintf_unfiltered (gdb_stdlog,
531 " realloc returned 0x%lx\n", (long) *bufp);
532 return *bufp ? PDC_SUCCESS : PDC_FAILURE;
535 /* pthdb callback: free BUF, which was allocated by the alloc or
539 pdc_dealloc (pthdb_user_t user, void *buf)
541 if (debug_aix_thread)
542 fprintf_unfiltered (gdb_stdlog,
543 "pdc_free (user = %ld, buf = 0x%lx)\n", user,
549 /* Return a printable representation of pthread STATE. */
552 state2str (pthdb_state_t state)
557 /* i18n: Like "Thread-Id %d, [state] idle" */
558 return _("idle"); /* being created */
560 /* i18n: Like "Thread-Id %d, [state] running" */
561 return _("running"); /* running */
563 /* i18n: Like "Thread-Id %d, [state] sleeping" */
564 return _("sleeping"); /* awaiting an event */
566 /* i18n: Like "Thread-Id %d, [state] ready" */
567 return _("ready"); /* runnable */
569 /* i18n: Like "Thread-Id %d, [state] finished" */
570 return _("finished"); /* awaiting a join/detach */
572 /* i18n: Like "Thread-Id %d, [state] unknown" */
577 /* qsort() comparison function for sorting pd_thread structs by pthid. */
580 pcmp (const void *p1v, const void *p2v)
582 struct pd_thread *p1 = (struct pd_thread *) p1v;
583 struct pd_thread *p2 = (struct pd_thread *) p2v;
584 return p1->pthid < p2->pthid ? -1 : p1->pthid > p2->pthid;
587 /* iterate_over_threads() callback for counting GDB threads.
589 Do not count the main thread (whose tid is zero). This matches
590 the list of threads provided by the pthreaddebug library, which
591 does not include that main thread either, and thus allows us
592 to compare the two lists. */
595 giter_count (struct thread_info *thread, void *countp)
597 if (PD_TID (thread->ptid))
602 /* iterate_over_threads() callback for accumulating GDB thread pids.
604 Do not include the main thread (whose tid is zero). This matches
605 the list of threads provided by the pthreaddebug library, which
606 does not include that main thread either, and thus allows us
607 to compare the two lists. */
610 giter_accum (struct thread_info *thread, void *bufp)
612 if (PD_TID (thread->ptid))
614 **(struct thread_info ***) bufp = thread;
615 (*(struct thread_info ***) bufp)++;
620 /* ptid comparison function */
623 ptid_cmp (ptid_t ptid1, ptid_t ptid2)
627 if (ptid_get_pid (ptid1) < ptid_get_pid (ptid2))
629 else if (ptid_get_pid (ptid1) > ptid_get_pid (ptid2))
631 else if (ptid_get_tid (ptid1) < ptid_get_tid (ptid2))
633 else if (ptid_get_tid (ptid1) > ptid_get_tid (ptid2))
635 else if (ptid_get_lwp (ptid1) < ptid_get_lwp (ptid2))
637 else if (ptid_get_lwp (ptid1) > ptid_get_lwp (ptid2))
643 /* qsort() comparison function for sorting thread_info structs by pid. */
646 gcmp (const void *t1v, const void *t2v)
648 struct thread_info *t1 = *(struct thread_info **) t1v;
649 struct thread_info *t2 = *(struct thread_info **) t2v;
650 return ptid_cmp (t1->ptid, t2->ptid);
653 /* Search through the list of all kernel threads for the thread
654 that has stopped on a SIGTRAP signal, and return its TID.
655 Return 0 if none found. */
658 get_signaled_thread (void)
660 struct thrdsinfo64 thrinf;
666 if (getthrds (ptid_get_pid (inferior_ptid), &thrinf,
667 sizeof (thrinf), &ktid, 1) != 1)
670 if (thrinf.ti_cursig == SIGTRAP)
671 return thrinf.ti_tid;
674 /* Didn't find any thread stopped on a SIGTRAP signal. */
678 /* Synchronize GDB's thread list with libpthdebug's.
680 There are some benefits of doing this every time the inferior stops:
682 - allows users to run thread-specific commands without needing to
683 run "info threads" first
685 - helps pthdb_tid_pthread() work properly (see "libpthdebug
686 peculiarities" at the top of this module)
688 - simplifies the demands placed on libpthdebug, which seems to
689 have difficulty with certain call patterns */
692 sync_threadlists (void)
694 int cmd, status, infpid;
695 int pcount, psize, pi, gcount, gi;
696 struct pd_thread *pbuf;
697 struct thread_info **gbuf, **g, *thread;
698 pthdb_pthread_t pdtid;
702 /* Accumulate an array of libpthdebug threads sorted by pthread id. */
706 pbuf = XNEWVEC (struct pd_thread, psize);
708 for (cmd = PTHDB_LIST_FIRST;; cmd = PTHDB_LIST_NEXT)
710 status = pthdb_pthread (pd_session, &pdtid, cmd);
711 if (status != PTHDB_SUCCESS || pdtid == PTHDB_INVALID_PTHREAD)
714 status = pthdb_pthread_ptid (pd_session, pdtid, &pthid);
715 if (status != PTHDB_SUCCESS || pthid == PTHDB_INVALID_PTID)
721 pbuf = (struct pd_thread *) xrealloc (pbuf,
722 psize * sizeof *pbuf);
724 pbuf[pcount].pdtid = pdtid;
725 pbuf[pcount].pthid = pthid;
729 for (pi = 0; pi < pcount; pi++)
731 status = pthdb_pthread_tid (pd_session, pbuf[pi].pdtid, &tid);
732 if (status != PTHDB_SUCCESS)
733 tid = PTHDB_INVALID_TID;
737 qsort (pbuf, pcount, sizeof *pbuf, pcmp);
739 /* Accumulate an array of GDB threads sorted by pid. */
742 iterate_over_threads (giter_count, &gcount);
743 g = gbuf = XNEWVEC (struct thread_info *, gcount);
744 iterate_over_threads (giter_accum, &g);
745 qsort (gbuf, gcount, sizeof *gbuf, gcmp);
747 /* Apply differences between the two arrays to GDB's thread list. */
749 infpid = ptid_get_pid (inferior_ptid);
750 for (pi = gi = 0; pi < pcount || gi < gcount;)
754 delete_thread (gbuf[gi]->ptid);
757 else if (gi == gcount)
759 thread = add_thread (ptid_build (infpid, 0, pbuf[pi].pthid));
760 thread->priv = XNEW (struct private_thread_info);
761 thread->priv->pdtid = pbuf[pi].pdtid;
762 thread->priv->tid = pbuf[pi].tid;
770 pptid = ptid_build (infpid, 0, pbuf[pi].pthid);
771 gptid = gbuf[gi]->ptid;
772 pdtid = pbuf[pi].pdtid;
775 cmp_result = ptid_cmp (pptid, gptid);
779 gbuf[gi]->priv->pdtid = pdtid;
780 gbuf[gi]->priv->tid = tid;
784 else if (cmp_result > 0)
786 delete_thread (gptid);
791 thread = add_thread (pptid);
792 thread->priv = XNEW (struct private_thread_info);
793 thread->priv->pdtid = pdtid;
794 thread->priv->tid = tid;
804 /* Iterate_over_threads() callback for locating a thread, using
805 the TID of its associated kernel thread. */
808 iter_tid (struct thread_info *thread, void *tidp)
810 const pthdb_tid_t tid = *(pthdb_tid_t *)tidp;
812 return (thread->priv->tid == tid);
815 /* Synchronize libpthdebug's state with the inferior and with GDB,
816 generate a composite process/thread <pid> for the current thread,
817 set inferior_ptid to <pid> if SET_INFPID, and return <pid>. */
820 pd_update (int set_infpid)
825 struct thread_info *thread = NULL;
828 return inferior_ptid;
830 status = pthdb_session_update (pd_session);
831 if (status != PTHDB_SUCCESS)
832 return inferior_ptid;
836 /* Define "current thread" as one that just received a trap signal. */
838 tid = get_signaled_thread ();
840 thread = iterate_over_threads (iter_tid, &tid);
842 ptid = inferior_ptid;
847 inferior_ptid = ptid;
852 /* Try to start debugging threads in the current process.
853 If successful and SET_INFPID, set inferior_ptid to reflect the
857 pd_activate (int set_infpid)
861 status = pthdb_session_init (PD_USER, arch64 ? PEM_64BIT : PEM_32BIT,
862 PTHDB_FLAG_REGS, &pd_callbacks,
864 if (status != PTHDB_SUCCESS)
866 return inferior_ptid;
869 return pd_update (set_infpid);
872 /* Undo the effects of pd_activate(). */
879 pthdb_session_destroy (pd_session);
881 pid_to_prc (&inferior_ptid);
885 /* An object file has just been loaded. Check whether the current
886 application is pthreaded, and if so, prepare for thread debugging. */
893 struct bound_minimal_symbol ms;
895 /* Don't initialize twice. */
899 /* Check application word size. */
900 arch64 = register_size (target_gdbarch (), 0) == 8;
902 /* Check whether the application is pthreaded. */
904 status = pthdb_session_pthreaded (PD_USER, PTHDB_FLAG_REGS,
905 &pd_callbacks, &stub_name);
906 if ((status != PTHDB_SUCCESS
907 && status != PTHDB_NOT_PTHREADED) || !stub_name)
910 /* Set a breakpoint on the returned stub function. */
911 ms = lookup_minimal_symbol (stub_name, NULL, NULL);
912 if (ms.minsym == NULL)
914 pd_brk_addr = BMSYMBOL_VALUE_ADDRESS (ms);
915 if (!create_thread_event_breakpoint (target_gdbarch (), pd_brk_addr))
918 /* Prepare for thread debugging. */
919 push_target (&aix_thread_ops);
922 /* If we're debugging a core file or an attached inferior, the
923 pthread library may already have been initialized, so try to
924 activate thread debugging. */
928 /* Undo the effects of pd_enable(). */
938 unpush_target (&aix_thread_ops);
941 /* new_objfile observer callback.
943 If OBJFILE is non-null, check whether a threaded application is
944 being debugged, and if so, prepare for thread debugging.
946 If OBJFILE is null, stop debugging threads. */
949 new_objfile (struct objfile *objfile)
957 /* Attach to process specified by ARGS. */
960 aix_thread_inferior_created (struct target_ops *ops, int from_tty)
965 /* Detach from the process attached to by aix_thread_attach(). */
968 aix_thread_detach (struct target_ops *ops, const char *args, int from_tty)
970 struct target_ops *beneath = find_target_beneath (ops);
973 beneath->to_detach (beneath, args, from_tty);
976 /* Tell the inferior process to continue running thread PID if != -1
977 and all threads otherwise. */
980 aix_thread_resume (struct target_ops *ops,
981 ptid_t ptid, int step, enum gdb_signal sig)
983 struct thread_info *thread;
988 struct cleanup *cleanup = save_inferior_ptid ();
989 struct target_ops *beneath = find_target_beneath (ops);
991 inferior_ptid = pid_to_ptid (ptid_get_pid (inferior_ptid));
992 beneath->to_resume (beneath, ptid, step, sig);
993 do_cleanups (cleanup);
997 thread = find_thread_ptid (ptid);
999 error (_("aix-thread resume: unknown pthread %ld"),
1000 ptid_get_lwp (ptid));
1002 tid[0] = thread->priv->tid;
1003 if (tid[0] == PTHDB_INVALID_TID)
1004 error (_("aix-thread resume: no tid for pthread %ld"),
1005 ptid_get_lwp (ptid));
1009 ptrace64aix (PTT_CONTINUE, tid[0], (long long) 1,
1010 gdb_signal_to_host (sig), (void *) tid);
1012 ptrace32 (PTT_CONTINUE, tid[0], (addr_ptr) 1,
1013 gdb_signal_to_host (sig), (void *) tid);
1017 /* Wait for thread/process ID if != -1 or for any thread otherwise.
1018 If an error occurs, return -1, else return the pid of the stopped
1022 aix_thread_wait (struct target_ops *ops,
1023 ptid_t ptid, struct target_waitstatus *status, int options)
1025 struct cleanup *cleanup = save_inferior_ptid ();
1026 struct target_ops *beneath = find_target_beneath (ops);
1030 inferior_ptid = pid_to_ptid (ptid_get_pid (inferior_ptid));
1031 ptid = beneath->to_wait (beneath, ptid, status, options);
1032 do_cleanups (cleanup);
1034 if (ptid_get_pid (ptid) == -1)
1035 return pid_to_ptid (-1);
1037 /* Check whether libpthdebug might be ready to be initialized. */
1038 if (!pd_active && status->kind == TARGET_WAITKIND_STOPPED
1039 && status->value.sig == GDB_SIGNAL_TRAP)
1041 struct regcache *regcache = get_thread_regcache (ptid);
1042 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1044 if (regcache_read_pc (regcache)
1045 - gdbarch_decr_pc_after_break (gdbarch) == pd_brk_addr)
1046 return pd_activate (0);
1049 return pd_update (0);
1052 /* Record that the 64-bit general-purpose registers contain VALS. */
1055 supply_gprs64 (struct regcache *regcache, uint64_t *vals)
1057 struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
1060 for (regno = 0; regno < ppc_num_gprs; regno++)
1061 regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + regno,
1062 (char *) (vals + regno));
1065 /* Record that 32-bit register REGNO contains VAL. */
1068 supply_reg32 (struct regcache *regcache, int regno, uint32_t val)
1070 regcache_raw_supply (regcache, regno, (char *) &val);
1073 /* Record that the floating-point registers contain VALS. */
1076 supply_fprs (struct regcache *regcache, double *vals)
1078 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1079 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1082 /* This function should never be called on architectures without
1083 floating-point registers. */
1084 gdb_assert (ppc_floating_point_unit_p (gdbarch));
1086 for (regno = tdep->ppc_fp0_regnum;
1087 regno < tdep->ppc_fp0_regnum + ppc_num_fprs;
1089 regcache_raw_supply (regcache, regno,
1090 (char *) (vals + regno - tdep->ppc_fp0_regnum));
1093 /* Predicate to test whether given register number is a "special" register. */
1095 special_register_p (struct gdbarch *gdbarch, int regno)
1097 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1099 return regno == gdbarch_pc_regnum (gdbarch)
1100 || regno == tdep->ppc_ps_regnum
1101 || regno == tdep->ppc_cr_regnum
1102 || regno == tdep->ppc_lr_regnum
1103 || regno == tdep->ppc_ctr_regnum
1104 || regno == tdep->ppc_xer_regnum
1105 || (tdep->ppc_fpscr_regnum >= 0 && regno == tdep->ppc_fpscr_regnum)
1106 || (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum);
1110 /* Record that the special registers contain the specified 64-bit and
1114 supply_sprs64 (struct regcache *regcache,
1115 uint64_t iar, uint64_t msr, uint32_t cr,
1116 uint64_t lr, uint64_t ctr, uint32_t xer,
1119 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1120 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1122 regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch),
1124 regcache_raw_supply (regcache, tdep->ppc_ps_regnum, (char *) &msr);
1125 regcache_raw_supply (regcache, tdep->ppc_cr_regnum, (char *) &cr);
1126 regcache_raw_supply (regcache, tdep->ppc_lr_regnum, (char *) &lr);
1127 regcache_raw_supply (regcache, tdep->ppc_ctr_regnum, (char *) &ctr);
1128 regcache_raw_supply (regcache, tdep->ppc_xer_regnum, (char *) &xer);
1129 if (tdep->ppc_fpscr_regnum >= 0)
1130 regcache_raw_supply (regcache, tdep->ppc_fpscr_regnum,
1134 /* Record that the special registers contain the specified 32-bit
1138 supply_sprs32 (struct regcache *regcache,
1139 uint32_t iar, uint32_t msr, uint32_t cr,
1140 uint32_t lr, uint32_t ctr, uint32_t xer,
1143 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1144 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1146 regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch),
1148 regcache_raw_supply (regcache, tdep->ppc_ps_regnum, (char *) &msr);
1149 regcache_raw_supply (regcache, tdep->ppc_cr_regnum, (char *) &cr);
1150 regcache_raw_supply (regcache, tdep->ppc_lr_regnum, (char *) &lr);
1151 regcache_raw_supply (regcache, tdep->ppc_ctr_regnum, (char *) &ctr);
1152 regcache_raw_supply (regcache, tdep->ppc_xer_regnum, (char *) &xer);
1153 if (tdep->ppc_fpscr_regnum >= 0)
1154 regcache_raw_supply (regcache, tdep->ppc_fpscr_regnum,
1158 /* Fetch all registers from pthread PDTID, which doesn't have a kernel
1161 There's no way to query a single register from a non-kernel
1162 pthread, so there's no need for a single-register version of this
1166 fetch_regs_user_thread (struct regcache *regcache, pthdb_pthread_t pdtid)
1168 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1169 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1171 pthdb_context_t ctx;
1173 if (debug_aix_thread)
1174 fprintf_unfiltered (gdb_stdlog,
1175 "fetch_regs_user_thread %lx\n", (long) pdtid);
1176 status = pthdb_pthread_context (pd_session, pdtid, &ctx);
1177 if (status != PTHDB_SUCCESS)
1178 error (_("aix-thread: fetch_registers: pthdb_pthread_context returned %s"),
1179 pd_status2str (status));
1181 /* General-purpose registers. */
1184 supply_gprs64 (regcache, ctx.gpr);
1186 for (i = 0; i < ppc_num_gprs; i++)
1187 supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, ctx.gpr[i]);
1189 /* Floating-point registers. */
1191 if (ppc_floating_point_unit_p (gdbarch))
1192 supply_fprs (regcache, ctx.fpr);
1194 /* Special registers. */
1197 supply_sprs64 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr,
1198 ctx.xer, ctx.fpscr);
1200 supply_sprs32 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr,
1201 ctx.xer, ctx.fpscr);
1204 /* Fetch register REGNO if != -1 or all registers otherwise from
1207 AIX provides a way to query all of a kernel thread's GPRs, FPRs, or
1208 SPRs, but there's no way to query individual registers within those
1209 groups. Therefore, if REGNO != -1, this function fetches an entire
1212 Unfortunately, kernel thread register queries often fail with
1213 EPERM, indicating that the thread is in kernel space. This breaks
1214 backtraces of threads other than the current one. To make that
1215 breakage obvious without throwing an error to top level (which is
1216 bad e.g. during "info threads" output), zero registers that can't
1220 fetch_regs_kernel_thread (struct regcache *regcache, int regno,
1223 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1224 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1225 uint64_t gprs64[ppc_num_gprs];
1226 uint32_t gprs32[ppc_num_gprs];
1227 double fprs[ppc_num_fprs];
1228 struct ptxsprs sprs64;
1229 struct ptsprs sprs32;
1232 if (debug_aix_thread)
1233 fprintf_unfiltered (gdb_stdlog,
1234 "fetch_regs_kernel_thread tid=%lx regno=%d arch64=%d\n",
1235 (long) tid, regno, arch64);
1237 /* General-purpose registers. */
1239 || (tdep->ppc_gp0_regnum <= regno
1240 && regno < tdep->ppc_gp0_regnum + ppc_num_gprs))
1244 if (!ptrace64aix (PTT_READ_GPRS, tid,
1245 (unsigned long) gprs64, 0, NULL))
1246 memset (gprs64, 0, sizeof (gprs64));
1247 supply_gprs64 (regcache, gprs64);
1251 if (!ptrace32 (PTT_READ_GPRS, tid, (uintptr_t) gprs32, 0, NULL))
1252 memset (gprs32, 0, sizeof (gprs32));
1253 for (i = 0; i < ppc_num_gprs; i++)
1254 supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, gprs32[i]);
1258 /* Floating-point registers. */
1260 if (ppc_floating_point_unit_p (gdbarch)
1262 || (regno >= tdep->ppc_fp0_regnum
1263 && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)))
1265 if (!ptrace32 (PTT_READ_FPRS, tid, (uintptr_t) fprs, 0, NULL))
1266 memset (fprs, 0, sizeof (fprs));
1267 supply_fprs (regcache, fprs);
1270 /* Special-purpose registers. */
1272 if (regno == -1 || special_register_p (gdbarch, regno))
1276 if (!ptrace64aix (PTT_READ_SPRS, tid,
1277 (unsigned long) &sprs64, 0, NULL))
1278 memset (&sprs64, 0, sizeof (sprs64));
1279 supply_sprs64 (regcache, sprs64.pt_iar, sprs64.pt_msr,
1280 sprs64.pt_cr, sprs64.pt_lr, sprs64.pt_ctr,
1281 sprs64.pt_xer, sprs64.pt_fpscr);
1285 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1287 if (!ptrace32 (PTT_READ_SPRS, tid, (uintptr_t) &sprs32, 0, NULL))
1288 memset (&sprs32, 0, sizeof (sprs32));
1289 supply_sprs32 (regcache, sprs32.pt_iar, sprs32.pt_msr, sprs32.pt_cr,
1290 sprs32.pt_lr, sprs32.pt_ctr, sprs32.pt_xer,
1293 if (tdep->ppc_mq_regnum >= 0)
1294 regcache_raw_supply (regcache, tdep->ppc_mq_regnum,
1295 (char *) &sprs32.pt_mq);
1300 /* Fetch register REGNO if != -1 or all registers otherwise in the
1301 thread/process specified by inferior_ptid. */
1304 aix_thread_fetch_registers (struct target_ops *ops,
1305 struct regcache *regcache, int regno)
1307 struct thread_info *thread;
1309 struct target_ops *beneath = find_target_beneath (ops);
1311 if (!PD_TID (inferior_ptid))
1312 beneath->to_fetch_registers (beneath, regcache, regno);
1315 thread = find_thread_ptid (inferior_ptid);
1316 tid = thread->priv->tid;
1318 if (tid == PTHDB_INVALID_TID)
1319 fetch_regs_user_thread (regcache, thread->priv->pdtid);
1321 fetch_regs_kernel_thread (regcache, regno, tid);
1325 /* Store the gp registers into an array of uint32_t or uint64_t. */
1328 fill_gprs64 (const struct regcache *regcache, uint64_t *vals)
1330 struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
1333 for (regno = 0; regno < ppc_num_gprs; regno++)
1334 if (REG_VALID == regcache_register_status (regcache,
1335 tdep->ppc_gp0_regnum + regno))
1336 regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + regno,
1341 fill_gprs32 (const struct regcache *regcache, uint32_t *vals)
1343 struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
1346 for (regno = 0; regno < ppc_num_gprs; regno++)
1347 if (REG_VALID == regcache_register_status (regcache,
1348 tdep->ppc_gp0_regnum + regno))
1349 regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + regno,
1353 /* Store the floating point registers into a double array. */
1355 fill_fprs (const struct regcache *regcache, double *vals)
1357 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1358 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1361 /* This function should never be called on architectures without
1362 floating-point registers. */
1363 gdb_assert (ppc_floating_point_unit_p (gdbarch));
1365 for (regno = tdep->ppc_fp0_regnum;
1366 regno < tdep->ppc_fp0_regnum + ppc_num_fprs;
1368 if (REG_VALID == regcache_register_status (regcache, regno))
1369 regcache_raw_collect (regcache, regno,
1370 vals + regno - tdep->ppc_fp0_regnum);
1373 /* Store the special registers into the specified 64-bit and 32-bit
1377 fill_sprs64 (const struct regcache *regcache,
1378 uint64_t *iar, uint64_t *msr, uint32_t *cr,
1379 uint64_t *lr, uint64_t *ctr, uint32_t *xer,
1382 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1383 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1385 /* Verify that the size of the size of the IAR buffer is the
1386 same as the raw size of the PC (in the register cache). If
1387 they're not, then either GDB has been built incorrectly, or
1388 there's some other kind of internal error. To be really safe,
1389 we should check all of the sizes. */
1390 gdb_assert (sizeof (*iar) == register_size
1391 (gdbarch, gdbarch_pc_regnum (gdbarch)));
1393 if (REG_VALID == regcache_register_status (regcache,
1394 gdbarch_pc_regnum (gdbarch)))
1395 regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), iar);
1396 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_ps_regnum))
1397 regcache_raw_collect (regcache, tdep->ppc_ps_regnum, msr);
1398 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_cr_regnum))
1399 regcache_raw_collect (regcache, tdep->ppc_cr_regnum, cr);
1400 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_lr_regnum))
1401 regcache_raw_collect (regcache, tdep->ppc_lr_regnum, lr);
1402 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_ctr_regnum))
1403 regcache_raw_collect (regcache, tdep->ppc_ctr_regnum, ctr);
1404 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_xer_regnum))
1405 regcache_raw_collect (regcache, tdep->ppc_xer_regnum, xer);
1406 if (tdep->ppc_fpscr_regnum >= 0
1407 && REG_VALID == regcache_register_status (regcache,
1408 tdep->ppc_fpscr_regnum))
1409 regcache_raw_collect (regcache, tdep->ppc_fpscr_regnum, fpscr);
1413 fill_sprs32 (const struct regcache *regcache,
1414 uint32_t *iar, uint32_t *msr, uint32_t *cr,
1415 uint32_t *lr, uint32_t *ctr, uint32_t *xer,
1418 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1419 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1421 /* Verify that the size of the size of the IAR buffer is the
1422 same as the raw size of the PC (in the register cache). If
1423 they're not, then either GDB has been built incorrectly, or
1424 there's some other kind of internal error. To be really safe,
1425 we should check all of the sizes. */
1426 gdb_assert (sizeof (*iar) == register_size (gdbarch,
1427 gdbarch_pc_regnum (gdbarch)));
1429 if (REG_VALID == regcache_register_status (regcache,
1430 gdbarch_pc_regnum (gdbarch)))
1431 regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), iar);
1432 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_ps_regnum))
1433 regcache_raw_collect (regcache, tdep->ppc_ps_regnum, msr);
1434 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_cr_regnum))
1435 regcache_raw_collect (regcache, tdep->ppc_cr_regnum, cr);
1436 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_lr_regnum))
1437 regcache_raw_collect (regcache, tdep->ppc_lr_regnum, lr);
1438 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_ctr_regnum))
1439 regcache_raw_collect (regcache, tdep->ppc_ctr_regnum, ctr);
1440 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_xer_regnum))
1441 regcache_raw_collect (regcache, tdep->ppc_xer_regnum, xer);
1442 if (tdep->ppc_fpscr_regnum >= 0
1443 && REG_VALID == regcache_register_status (regcache, tdep->ppc_fpscr_regnum))
1444 regcache_raw_collect (regcache, tdep->ppc_fpscr_regnum, fpscr);
1447 /* Store all registers into pthread PDTID, which doesn't have a kernel
1450 It's possible to store a single register into a non-kernel pthread,
1451 but I doubt it's worth the effort. */
1454 store_regs_user_thread (const struct regcache *regcache, pthdb_pthread_t pdtid)
1456 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1457 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1459 pthdb_context_t ctx;
1464 if (debug_aix_thread)
1465 fprintf_unfiltered (gdb_stdlog,
1466 "store_regs_user_thread %lx\n", (long) pdtid);
1468 /* Retrieve the thread's current context for its non-register
1470 status = pthdb_pthread_context (pd_session, pdtid, &ctx);
1471 if (status != PTHDB_SUCCESS)
1472 error (_("aix-thread: store_registers: pthdb_pthread_context returned %s"),
1473 pd_status2str (status));
1475 /* Collect general-purpose register values from the regcache. */
1477 for (i = 0; i < ppc_num_gprs; i++)
1478 if (REG_VALID == regcache_register_status (regcache,
1479 tdep->ppc_gp0_regnum + i))
1483 regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + i,
1489 regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + i,
1495 /* Collect floating-point register values from the regcache. */
1496 if (ppc_floating_point_unit_p (gdbarch))
1497 fill_fprs (regcache, ctx.fpr);
1499 /* Special registers (always kept in ctx as 64 bits). */
1502 fill_sprs64 (regcache, &ctx.iar, &ctx.msr, &ctx.cr, &ctx.lr, &ctx.ctr,
1503 &ctx.xer, &ctx.fpscr);
1507 /* Problem: ctx.iar etc. are 64 bits, but raw_registers are 32.
1508 Solution: use 32-bit temp variables. */
1509 uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer,
1512 fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr, &tmp_ctr,
1513 &tmp_xer, &tmp_fpscr);
1514 if (REG_VALID == regcache_register_status (regcache,
1515 gdbarch_pc_regnum (gdbarch)))
1517 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_ps_regnum))
1519 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_cr_regnum))
1521 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_lr_regnum))
1523 if (REG_VALID == regcache_register_status (regcache,
1524 tdep->ppc_ctr_regnum))
1526 if (REG_VALID == regcache_register_status (regcache,
1527 tdep->ppc_xer_regnum))
1529 if (REG_VALID == regcache_register_status (regcache,
1530 tdep->ppc_xer_regnum))
1531 ctx.fpscr = tmp_fpscr;
1534 status = pthdb_pthread_setcontext (pd_session, pdtid, &ctx);
1535 if (status != PTHDB_SUCCESS)
1536 error (_("aix-thread: store_registers: "
1537 "pthdb_pthread_setcontext returned %s"),
1538 pd_status2str (status));
1541 /* Store register REGNO if != -1 or all registers otherwise into
1544 AIX provides a way to set all of a kernel thread's GPRs, FPRs, or
1545 SPRs, but there's no way to set individual registers within those
1546 groups. Therefore, if REGNO != -1, this function stores an entire
1550 store_regs_kernel_thread (const struct regcache *regcache, int regno,
1553 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1554 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1555 uint64_t gprs64[ppc_num_gprs];
1556 uint32_t gprs32[ppc_num_gprs];
1557 double fprs[ppc_num_fprs];
1558 struct ptxsprs sprs64;
1559 struct ptsprs sprs32;
1562 if (debug_aix_thread)
1563 fprintf_unfiltered (gdb_stdlog,
1564 "store_regs_kernel_thread tid=%lx regno=%d\n",
1567 /* General-purpose registers. */
1569 || (tdep->ppc_gp0_regnum <= regno
1570 && regno < tdep->ppc_gp0_regnum + ppc_num_fprs))
1574 /* Pre-fetch: some regs may not be in the cache. */
1575 ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL);
1576 fill_gprs64 (regcache, gprs64);
1577 ptrace64aix (PTT_WRITE_GPRS, tid, (unsigned long) gprs64, 0, NULL);
1581 /* Pre-fetch: some regs may not be in the cache. */
1582 ptrace32 (PTT_READ_GPRS, tid, (uintptr_t) gprs32, 0, NULL);
1583 fill_gprs32 (regcache, gprs32);
1584 ptrace32 (PTT_WRITE_GPRS, tid, (uintptr_t) gprs32, 0, NULL);
1588 /* Floating-point registers. */
1590 if (ppc_floating_point_unit_p (gdbarch)
1592 || (regno >= tdep->ppc_fp0_regnum
1593 && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)))
1595 /* Pre-fetch: some regs may not be in the cache. */
1596 ptrace32 (PTT_READ_FPRS, tid, (uintptr_t) fprs, 0, NULL);
1597 fill_fprs (regcache, fprs);
1598 ptrace32 (PTT_WRITE_FPRS, tid, (uintptr_t) fprs, 0, NULL);
1601 /* Special-purpose registers. */
1603 if (regno == -1 || special_register_p (gdbarch, regno))
1607 /* Pre-fetch: some registers won't be in the cache. */
1608 ptrace64aix (PTT_READ_SPRS, tid,
1609 (unsigned long) &sprs64, 0, NULL);
1610 fill_sprs64 (regcache, &sprs64.pt_iar, &sprs64.pt_msr,
1611 &sprs64.pt_cr, &sprs64.pt_lr, &sprs64.pt_ctr,
1612 &sprs64.pt_xer, &sprs64.pt_fpscr);
1613 ptrace64aix (PTT_WRITE_SPRS, tid,
1614 (unsigned long) &sprs64, 0, NULL);
1618 /* The contents of "struct ptspr" were declared as "unsigned
1619 long" up to AIX 5.2, but are "unsigned int" since 5.3.
1620 Use temporaries to work around this problem. Also, add an
1621 assert here to make sure we fail if the system header files
1622 use "unsigned long", and the size of that type is not what
1623 the headers expect. */
1624 uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer,
1627 gdb_assert (sizeof (sprs32.pt_iar) == 4);
1629 /* Pre-fetch: some registers won't be in the cache. */
1630 ptrace32 (PTT_READ_SPRS, tid, (uintptr_t) &sprs32, 0, NULL);
1632 fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr,
1633 &tmp_ctr, &tmp_xer, &tmp_fpscr);
1635 sprs32.pt_iar = tmp_iar;
1636 sprs32.pt_msr = tmp_msr;
1637 sprs32.pt_cr = tmp_cr;
1638 sprs32.pt_lr = tmp_lr;
1639 sprs32.pt_ctr = tmp_ctr;
1640 sprs32.pt_xer = tmp_xer;
1641 sprs32.pt_fpscr = tmp_fpscr;
1643 if (tdep->ppc_mq_regnum >= 0)
1644 if (REG_VALID == regcache_register_status (regcache,
1645 tdep->ppc_mq_regnum))
1646 regcache_raw_collect (regcache, tdep->ppc_mq_regnum,
1649 ptrace32 (PTT_WRITE_SPRS, tid, (uintptr_t) &sprs32, 0, NULL);
1654 /* Store gdb's current view of the register set into the
1655 thread/process specified by inferior_ptid. */
1658 aix_thread_store_registers (struct target_ops *ops,
1659 struct regcache *regcache, int regno)
1661 struct thread_info *thread;
1663 struct target_ops *beneath = find_target_beneath (ops);
1665 if (!PD_TID (inferior_ptid))
1666 beneath->to_store_registers (beneath, regcache, regno);
1669 thread = find_thread_ptid (inferior_ptid);
1670 tid = thread->priv->tid;
1672 if (tid == PTHDB_INVALID_TID)
1673 store_regs_user_thread (regcache, thread->priv->pdtid);
1675 store_regs_kernel_thread (regcache, regno, tid);
1679 /* Implement the to_xfer_partial target_ops method. */
1681 static enum target_xfer_status
1682 aix_thread_xfer_partial (struct target_ops *ops, enum target_object object,
1683 const char *annex, gdb_byte *readbuf,
1684 const gdb_byte *writebuf,
1685 ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
1687 struct cleanup *old_chain = save_inferior_ptid ();
1688 enum target_xfer_status xfer;
1689 struct target_ops *beneath = find_target_beneath (ops);
1691 inferior_ptid = pid_to_ptid (ptid_get_pid (inferior_ptid));
1692 xfer = beneath->to_xfer_partial (beneath, object, annex, readbuf,
1693 writebuf, offset, len, xfered_len);
1695 do_cleanups (old_chain);
1699 /* Clean up after the inferior exits. */
1702 aix_thread_mourn_inferior (struct target_ops *ops)
1704 struct target_ops *beneath = find_target_beneath (ops);
1707 beneath->to_mourn_inferior (beneath);
1710 /* Return whether thread PID is still valid. */
1713 aix_thread_thread_alive (struct target_ops *ops, ptid_t ptid)
1715 struct target_ops *beneath = find_target_beneath (ops);
1718 return beneath->to_thread_alive (beneath, ptid);
1720 /* We update the thread list every time the child stops, so all
1721 valid threads should be in the thread list. */
1722 return in_thread_list (ptid);
1725 /* Return a printable representation of composite PID for use in
1726 "info threads" output. */
1729 aix_thread_pid_to_str (struct target_ops *ops, ptid_t ptid)
1731 static char *ret = NULL;
1732 struct target_ops *beneath = find_target_beneath (ops);
1735 return beneath->to_pid_to_str (beneath, ptid);
1737 /* Free previous return value; a new one will be allocated by
1741 ret = xstrprintf (_("Thread %ld"), ptid_get_tid (ptid));
1745 /* Return a printable representation of extra information about
1746 THREAD, for use in "info threads" output. */
1749 aix_thread_extra_thread_info (struct target_ops *self,
1750 struct thread_info *thread)
1752 struct ui_file *buf;
1754 pthdb_pthread_t pdtid;
1756 pthdb_state_t state;
1757 pthdb_suspendstate_t suspendstate;
1758 pthdb_detachstate_t detachstate;
1760 static char *ret = NULL;
1762 if (!PD_TID (thread->ptid))
1765 buf = mem_fileopen ();
1767 pdtid = thread->priv->pdtid;
1768 tid = thread->priv->tid;
1770 if (tid != PTHDB_INVALID_TID)
1771 /* i18n: Like "thread-identifier %d, [state] running, suspended" */
1772 fprintf_unfiltered (buf, _("tid %d"), (int)tid);
1774 status = pthdb_pthread_state (pd_session, pdtid, &state);
1775 if (status != PTHDB_SUCCESS)
1777 fprintf_unfiltered (buf, ", %s", state2str (state));
1779 status = pthdb_pthread_suspendstate (pd_session, pdtid,
1781 if (status == PTHDB_SUCCESS && suspendstate == PSS_SUSPENDED)
1782 /* i18n: Like "Thread-Id %d, [state] running, suspended" */
1783 fprintf_unfiltered (buf, _(", suspended"));
1785 status = pthdb_pthread_detachstate (pd_session, pdtid,
1787 if (status == PTHDB_SUCCESS && detachstate == PDS_DETACHED)
1788 /* i18n: Like "Thread-Id %d, [state] running, detached" */
1789 fprintf_unfiltered (buf, _(", detached"));
1791 pthdb_pthread_cancelpend (pd_session, pdtid, &cancelpend);
1792 if (status == PTHDB_SUCCESS && cancelpend)
1793 /* i18n: Like "Thread-Id %d, [state] running, cancel pending" */
1794 fprintf_unfiltered (buf, _(", cancel pending"));
1796 ui_file_write (buf, "", 1);
1798 xfree (ret); /* Free old buffer. */
1800 ret = ui_file_xstrdup (buf, NULL);
1801 ui_file_delete (buf);
1807 aix_thread_get_ada_task_ptid (struct target_ops *self, long lwp, long thread)
1809 return ptid_build (ptid_get_pid (inferior_ptid), 0, thread);
1812 /* Initialize target aix_thread_ops. */
1815 init_aix_thread_ops (void)
1817 aix_thread_ops.to_shortname = "aix-threads";
1818 aix_thread_ops.to_longname = _("AIX pthread support");
1819 aix_thread_ops.to_doc = _("AIX pthread support");
1821 aix_thread_ops.to_detach = aix_thread_detach;
1822 aix_thread_ops.to_resume = aix_thread_resume;
1823 aix_thread_ops.to_wait = aix_thread_wait;
1824 aix_thread_ops.to_fetch_registers = aix_thread_fetch_registers;
1825 aix_thread_ops.to_store_registers = aix_thread_store_registers;
1826 aix_thread_ops.to_xfer_partial = aix_thread_xfer_partial;
1827 aix_thread_ops.to_mourn_inferior = aix_thread_mourn_inferior;
1828 aix_thread_ops.to_thread_alive = aix_thread_thread_alive;
1829 aix_thread_ops.to_pid_to_str = aix_thread_pid_to_str;
1830 aix_thread_ops.to_extra_thread_info = aix_thread_extra_thread_info;
1831 aix_thread_ops.to_get_ada_task_ptid = aix_thread_get_ada_task_ptid;
1832 aix_thread_ops.to_stratum = thread_stratum;
1833 aix_thread_ops.to_magic = OPS_MAGIC;
1836 /* Module startup initialization function, automagically called by
1839 void _initialize_aix_thread (void);
1842 _initialize_aix_thread (void)
1844 init_aix_thread_ops ();
1845 complete_target_initialization (&aix_thread_ops);
1847 /* Notice when object files get loaded and unloaded. */
1848 observer_attach_new_objfile (new_objfile);
1850 /* Add ourselves to inferior_created event chain.
1851 This is needed to enable the thread target on "attach". */
1852 observer_attach_inferior_created (aix_thread_inferior_created);
1854 add_setshow_boolean_cmd ("aix-thread", class_maintenance, &debug_aix_thread,
1855 _("Set debugging of AIX thread module."),
1856 _("Show debugging of AIX thread module."),
1857 _("Enables debugging output (used to debug GDB)."),
1859 /* FIXME: i18n: Debugging of AIX thread
1860 module is \"%d\". */
1861 &setdebuglist, &showdebuglist);