1 /* Low level interface for debugging AIX 4.3+ pthreads.
3 Copyright (C) 1999-2000, 2002, 2007-2012 Free Software Foundation,
5 Written by Nick Duffek <nsd@redhat.com>.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 /* This module uses the libpthdebug.a library provided by AIX 4.3+ for
24 debugging pthread applications.
26 Some name prefix conventions:
27 pthdb_ provided by libpthdebug.a
28 pdc_ callbacks that this module provides to libpthdebug.a
29 pd_ variables or functions interfacing with libpthdebug.a
31 libpthdebug peculiarities:
33 - pthdb_ptid_pthread() is prototyped in <sys/pthdebug.h>, but
34 it's not documented, and after several calls it stops working
35 and causes other libpthdebug functions to fail.
37 - pthdb_tid_pthread() doesn't always work after
38 pthdb_session_update(), but it does work after cycling through
39 all threads using pthdb_pthread().
44 #include "gdb_assert.h"
45 #include "gdbthread.h"
51 #include "gdb_string.h"
55 #include <sys/types.h>
56 #include <sys/ptrace.h>
59 #include <sys/pthdebug.h>
61 #if !HAVE_DECL_GETTHRDS
62 extern int getthrds (pid_t, struct thrdsinfo64 *, int, pthdb_tid_t *, int);
65 /* Whether to emit debugging output. */
66 static int debug_aix_thread;
68 /* In AIX 5.1, functions use pthdb_tid_t instead of tid_t. */
69 #ifndef PTHDB_VERSION_3
70 #define pthdb_tid_t tid_t
73 /* Return whether to treat PID as a debuggable thread id. */
75 #define PD_TID(ptid) (pd_active && ptid_get_tid (ptid) != 0)
77 /* Build a thread ptid. */
78 #define BUILD_THREAD(TID, PID) ptid_build (PID, 0, TID)
80 /* Build and lwp ptid. */
81 #define BUILD_LWP(LWP, PID) MERGEPID (PID, LWP)
83 /* pthdb_user_t value that we pass to pthdb functions. 0 causes
84 PTHDB_BAD_USER errors, so use 1. */
88 /* Success and failure values returned by pthdb callbacks. */
90 #define PDC_SUCCESS PTHDB_SUCCESS
91 #define PDC_FAILURE PTHDB_CALLBACK
93 /* Private data attached to each element in GDB's thread list. */
95 struct private_thread_info {
96 pthdb_pthread_t pdtid; /* thread's libpthdebug id */
97 pthdb_tid_t tid; /* kernel thread id */
100 /* Information about a thread of which libpthdebug is aware. */
103 pthdb_pthread_t pdtid;
108 /* This module's target-specific operations, active while pd_able is true. */
110 static struct target_ops aix_thread_ops;
112 /* Address of the function that libpthread will call when libpthdebug
113 is ready to be initialized. */
115 static CORE_ADDR pd_brk_addr;
117 /* Whether the current application is debuggable by pthdb. */
119 static int pd_able = 0;
121 /* Whether a threaded application is being debugged. */
123 static int pd_active = 0;
125 /* Whether the current architecture is 64-bit.
126 Only valid when pd_able is true. */
130 /* Forward declarations for pthdb callbacks. */
132 static int pdc_symbol_addrs (pthdb_user_t, pthdb_symbol_t *, int);
133 static int pdc_read_data (pthdb_user_t, void *, pthdb_addr_t, size_t);
134 static int pdc_write_data (pthdb_user_t, void *, pthdb_addr_t, size_t);
135 static int pdc_read_regs (pthdb_user_t user, pthdb_tid_t tid,
136 unsigned long long flags,
137 pthdb_context_t *context);
138 static int pdc_write_regs (pthdb_user_t user, pthdb_tid_t tid,
139 unsigned long long flags,
140 pthdb_context_t *context);
141 static int pdc_alloc (pthdb_user_t, size_t, void **);
142 static int pdc_realloc (pthdb_user_t, void *, size_t, void **);
143 static int pdc_dealloc (pthdb_user_t, void *);
145 /* pthdb callbacks. */
147 static pthdb_callbacks_t pd_callbacks = {
159 /* Current pthdb session. */
161 static pthdb_session_t pd_session;
163 /* Return a printable representation of pthdebug function return
167 pd_status2str (int status)
171 case PTHDB_SUCCESS: return "SUCCESS";
172 case PTHDB_NOSYS: return "NOSYS";
173 case PTHDB_NOTSUP: return "NOTSUP";
174 case PTHDB_BAD_VERSION: return "BAD_VERSION";
175 case PTHDB_BAD_USER: return "BAD_USER";
176 case PTHDB_BAD_SESSION: return "BAD_SESSION";
177 case PTHDB_BAD_MODE: return "BAD_MODE";
178 case PTHDB_BAD_FLAGS: return "BAD_FLAGS";
179 case PTHDB_BAD_CALLBACK: return "BAD_CALLBACK";
180 case PTHDB_BAD_POINTER: return "BAD_POINTER";
181 case PTHDB_BAD_CMD: return "BAD_CMD";
182 case PTHDB_BAD_PTHREAD: return "BAD_PTHREAD";
183 case PTHDB_BAD_ATTR: return "BAD_ATTR";
184 case PTHDB_BAD_MUTEX: return "BAD_MUTEX";
185 case PTHDB_BAD_MUTEXATTR: return "BAD_MUTEXATTR";
186 case PTHDB_BAD_COND: return "BAD_COND";
187 case PTHDB_BAD_CONDATTR: return "BAD_CONDATTR";
188 case PTHDB_BAD_RWLOCK: return "BAD_RWLOCK";
189 case PTHDB_BAD_RWLOCKATTR: return "BAD_RWLOCKATTR";
190 case PTHDB_BAD_KEY: return "BAD_KEY";
191 case PTHDB_BAD_PTID: return "BAD_PTID";
192 case PTHDB_BAD_TID: return "BAD_TID";
193 case PTHDB_CALLBACK: return "CALLBACK";
194 case PTHDB_CONTEXT: return "CONTEXT";
195 case PTHDB_HELD: return "HELD";
196 case PTHDB_NOT_HELD: return "NOT_HELD";
197 case PTHDB_MEMORY: return "MEMORY";
198 case PTHDB_NOT_PTHREADED: return "NOT_PTHREADED";
199 case PTHDB_SYMBOL: return "SYMBOL";
200 case PTHDB_NOT_AVAIL: return "NOT_AVAIL";
201 case PTHDB_INTERNAL: return "INTERNAL";
202 default: return "UNKNOWN";
206 /* A call to ptrace(REQ, ID, ...) just returned RET. Check for
207 exceptional conditions and either return nonlocally or else return
208 1 for success and 0 for failure. */
211 ptrace_check (int req, int id, int ret)
213 if (ret == 0 && !errno)
216 /* According to ptrace(2), ptrace may fail with EPERM if "the
217 Identifier parameter corresponds to a kernel thread which is
218 stopped in kernel mode and whose computational state cannot be
219 read or written." This happens quite often with register reads. */
226 if (ret == -1 && errno == EPERM)
228 if (debug_aix_thread)
229 fprintf_unfiltered (gdb_stdlog,
230 "ptrace (%d, %d) = %d (errno = %d)\n",
231 req, id, ret, errno);
232 return ret == -1 ? 0 : 1;
236 error (_("aix-thread: ptrace (%d, %d) returned %d (errno = %d %s)"),
237 req, id, ret, errno, safe_strerror (errno));
238 return 0; /* Not reached. */
241 /* Call ptracex (REQ, ID, ADDR, DATA, BUF). Return success. */
244 ptrace64aix (int req, int id, long long addr, int data, int *buf)
247 return ptrace_check (req, id, ptracex (req, id, addr, data, buf));
250 /* Call ptrace (REQ, ID, ADDR, DATA, BUF). Return success. */
253 ptrace32 (int req, int id, int *addr, int data, int *buf)
256 return ptrace_check (req, id,
257 ptrace (req, id, (int *) addr, data, buf));
260 /* If *PIDP is a composite process/thread id, convert it to a
264 pid_to_prc (ptid_t *ptidp)
270 *ptidp = pid_to_ptid (PIDGET (ptid));
273 /* pthdb callback: for <i> from 0 to COUNT, set SYMBOLS[<i>].addr to
274 the address of SYMBOLS[<i>].name. */
277 pdc_symbol_addrs (pthdb_user_t user, pthdb_symbol_t *symbols, int count)
279 struct minimal_symbol *ms;
283 if (debug_aix_thread)
284 fprintf_unfiltered (gdb_stdlog,
285 "pdc_symbol_addrs (user = %ld, symbols = 0x%lx, count = %d)\n",
286 user, (long) symbols, count);
288 for (i = 0; i < count; i++)
290 name = symbols[i].name;
291 if (debug_aix_thread)
292 fprintf_unfiltered (gdb_stdlog,
293 " symbols[%d].name = \"%s\"\n", i, name);
299 if (!(ms = lookup_minimal_symbol (name, NULL, NULL)))
301 if (debug_aix_thread)
302 fprintf_unfiltered (gdb_stdlog, " returning PDC_FAILURE\n");
305 symbols[i].addr = SYMBOL_VALUE_ADDRESS (ms);
307 if (debug_aix_thread)
308 fprintf_unfiltered (gdb_stdlog, " symbols[%d].addr = %s\n",
309 i, hex_string (symbols[i].addr));
311 if (debug_aix_thread)
312 fprintf_unfiltered (gdb_stdlog, " returning PDC_SUCCESS\n");
316 /* Read registers call back function should be able to read the
317 context information of a debuggee kernel thread from an active
318 process or from a core file. The information should be formatted
319 in context64 form for both 32-bit and 64-bit process.
320 If successful return 0, else non-zero is returned. */
323 pdc_read_regs (pthdb_user_t user,
325 unsigned long long flags,
326 pthdb_context_t *context)
328 /* This function doesn't appear to be used, so we could probably
329 just return 0 here. HOWEVER, if it is not defined, the OS will
330 complain and several thread debug functions will fail. In case
331 this is needed, I have implemented what I think it should do,
332 however this code is untested. */
334 uint64_t gprs64[ppc_num_gprs];
335 uint32_t gprs32[ppc_num_gprs];
336 double fprs[ppc_num_fprs];
337 struct ptxsprs sprs64;
338 struct ptsprs sprs32;
340 if (debug_aix_thread)
341 fprintf_unfiltered (gdb_stdlog, "pdc_read_regs tid=%d flags=%s\n",
342 (int) tid, hex_string (flags));
344 /* General-purpose registers. */
345 if (flags & PTHDB_FLAG_GPRS)
349 if (!ptrace64aix (PTT_READ_GPRS, tid,
350 (unsigned long) gprs64, 0, NULL))
351 memset (gprs64, 0, sizeof (gprs64));
352 memcpy (context->gpr, gprs64, sizeof(gprs64));
356 if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL))
357 memset (gprs32, 0, sizeof (gprs32));
358 memcpy (context->gpr, gprs32, sizeof(gprs32));
362 /* Floating-point registers. */
363 if (flags & PTHDB_FLAG_FPRS)
365 if (!ptrace32 (PTT_READ_FPRS, tid, (void *) fprs, 0, NULL))
366 memset (fprs, 0, sizeof (fprs));
367 memcpy (context->fpr, fprs, sizeof(fprs));
370 /* Special-purpose registers. */
371 if (flags & PTHDB_FLAG_SPRS)
375 if (!ptrace64aix (PTT_READ_SPRS, tid,
376 (unsigned long) &sprs64, 0, NULL))
377 memset (&sprs64, 0, sizeof (sprs64));
378 memcpy (&context->msr, &sprs64, sizeof(sprs64));
382 if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL))
383 memset (&sprs32, 0, sizeof (sprs32));
384 memcpy (&context->msr, &sprs32, sizeof(sprs32));
390 /* Write register function should be able to write requested context
391 information to specified debuggee's kernel thread id.
392 If successful return 0, else non-zero is returned. */
395 pdc_write_regs (pthdb_user_t user,
397 unsigned long long flags,
398 pthdb_context_t *context)
400 /* This function doesn't appear to be used, so we could probably
401 just return 0 here. HOWEVER, if it is not defined, the OS will
402 complain and several thread debug functions will fail. In case
403 this is needed, I have implemented what I think it should do,
404 however this code is untested. */
406 if (debug_aix_thread)
407 fprintf_unfiltered (gdb_stdlog, "pdc_write_regs tid=%d flags=%s\n",
408 (int) tid, hex_string (flags));
410 /* General-purpose registers. */
411 if (flags & PTHDB_FLAG_GPRS)
414 ptrace64aix (PTT_WRITE_GPRS, tid,
415 (unsigned long) context->gpr, 0, NULL);
417 ptrace32 (PTT_WRITE_GPRS, tid, (int *) context->gpr, 0, NULL);
420 /* Floating-point registers. */
421 if (flags & PTHDB_FLAG_FPRS)
423 ptrace32 (PTT_WRITE_FPRS, tid, (int *) context->fpr, 0, NULL);
426 /* Special-purpose registers. */
427 if (flags & PTHDB_FLAG_SPRS)
431 ptrace64aix (PTT_WRITE_SPRS, tid,
432 (unsigned long) &context->msr, 0, NULL);
436 ptrace32 (PTT_WRITE_SPRS, tid, (void *) &context->msr, 0, NULL);
442 /* pthdb callback: read LEN bytes from process ADDR into BUF. */
445 pdc_read_data (pthdb_user_t user, void *buf,
446 pthdb_addr_t addr, size_t len)
450 if (debug_aix_thread)
451 fprintf_unfiltered (gdb_stdlog,
452 "pdc_read_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n",
453 user, (long) buf, hex_string (addr), len);
455 status = target_read_memory (addr, buf, len);
456 ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE;
458 if (debug_aix_thread)
459 fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n",
460 status, pd_status2str (ret));
464 /* pthdb callback: write LEN bytes from BUF to process ADDR. */
467 pdc_write_data (pthdb_user_t user, void *buf,
468 pthdb_addr_t addr, size_t len)
472 if (debug_aix_thread)
473 fprintf_unfiltered (gdb_stdlog,
474 "pdc_write_data (user = %ld, buf = 0x%lx, addr = %s, len = %ld)\n",
475 user, (long) buf, hex_string (addr), len);
477 status = target_write_memory (addr, buf, len);
478 ret = status == 0 ? PDC_SUCCESS : PDC_FAILURE;
480 if (debug_aix_thread)
481 fprintf_unfiltered (gdb_stdlog, " status=%d, returning %s\n", status,
482 pd_status2str (ret));
486 /* pthdb callback: allocate a LEN-byte buffer and store a pointer to it
490 pdc_alloc (pthdb_user_t user, size_t len, void **bufp)
492 if (debug_aix_thread)
493 fprintf_unfiltered (gdb_stdlog,
494 "pdc_alloc (user = %ld, len = %ld, bufp = 0x%lx)\n",
495 user, len, (long) bufp);
496 *bufp = xmalloc (len);
497 if (debug_aix_thread)
498 fprintf_unfiltered (gdb_stdlog,
499 " malloc returned 0x%lx\n", (long) *bufp);
501 /* Note: xmalloc() can't return 0; therefore PDC_FAILURE will never
504 return *bufp ? PDC_SUCCESS : PDC_FAILURE;
507 /* pthdb callback: reallocate BUF, which was allocated by the alloc or
508 realloc callback, so that it contains LEN bytes, and store a
509 pointer to the result in BUFP. */
512 pdc_realloc (pthdb_user_t user, void *buf, size_t len, void **bufp)
514 if (debug_aix_thread)
515 fprintf_unfiltered (gdb_stdlog,
516 "pdc_realloc (user = %ld, buf = 0x%lx, len = %ld, bufp = 0x%lx)\n",
517 user, (long) buf, len, (long) bufp);
518 *bufp = xrealloc (buf, len);
519 if (debug_aix_thread)
520 fprintf_unfiltered (gdb_stdlog,
521 " realloc returned 0x%lx\n", (long) *bufp);
522 return *bufp ? PDC_SUCCESS : PDC_FAILURE;
525 /* pthdb callback: free BUF, which was allocated by the alloc or
529 pdc_dealloc (pthdb_user_t user, void *buf)
531 if (debug_aix_thread)
532 fprintf_unfiltered (gdb_stdlog,
533 "pdc_free (user = %ld, buf = 0x%lx)\n", user,
539 /* Return a printable representation of pthread STATE. */
542 state2str (pthdb_state_t state)
547 /* i18n: Like "Thread-Id %d, [state] idle" */
548 return _("idle"); /* being created */
550 /* i18n: Like "Thread-Id %d, [state] running" */
551 return _("running"); /* running */
553 /* i18n: Like "Thread-Id %d, [state] sleeping" */
554 return _("sleeping"); /* awaiting an event */
556 /* i18n: Like "Thread-Id %d, [state] ready" */
557 return _("ready"); /* runnable */
559 /* i18n: Like "Thread-Id %d, [state] finished" */
560 return _("finished"); /* awaiting a join/detach */
562 /* i18n: Like "Thread-Id %d, [state] unknown" */
567 /* qsort() comparison function for sorting pd_thread structs by pthid. */
570 pcmp (const void *p1v, const void *p2v)
572 struct pd_thread *p1 = (struct pd_thread *) p1v;
573 struct pd_thread *p2 = (struct pd_thread *) p2v;
574 return p1->pthid < p2->pthid ? -1 : p1->pthid > p2->pthid;
577 /* iterate_over_threads() callback for counting GDB threads.
579 Do not count the main thread (whose tid is zero). This matches
580 the list of threads provided by the pthreaddebug library, which
581 does not include that main thread either, and thus allows us
582 to compare the two lists. */
585 giter_count (struct thread_info *thread, void *countp)
587 if (PD_TID (thread->ptid))
592 /* iterate_over_threads() callback for accumulating GDB thread pids.
594 Do not include the main thread (whose tid is zero). This matches
595 the list of threads provided by the pthreaddebug library, which
596 does not include that main thread either, and thus allows us
597 to compare the two lists. */
600 giter_accum (struct thread_info *thread, void *bufp)
602 if (PD_TID (thread->ptid))
604 **(struct thread_info ***) bufp = thread;
605 (*(struct thread_info ***) bufp)++;
610 /* ptid comparison function */
613 ptid_cmp (ptid_t ptid1, ptid_t ptid2)
617 if (ptid_get_pid (ptid1) < ptid_get_pid (ptid2))
619 else if (ptid_get_pid (ptid1) > ptid_get_pid (ptid2))
621 else if (ptid_get_tid (ptid1) < ptid_get_tid (ptid2))
623 else if (ptid_get_tid (ptid1) > ptid_get_tid (ptid2))
625 else if (ptid_get_lwp (ptid1) < ptid_get_lwp (ptid2))
627 else if (ptid_get_lwp (ptid1) > ptid_get_lwp (ptid2))
633 /* qsort() comparison function for sorting thread_info structs by pid. */
636 gcmp (const void *t1v, const void *t2v)
638 struct thread_info *t1 = *(struct thread_info **) t1v;
639 struct thread_info *t2 = *(struct thread_info **) t2v;
640 return ptid_cmp (t1->ptid, t2->ptid);
643 /* Search through the list of all kernel threads for the thread
644 that has stopped on a SIGTRAP signal, and return its TID.
645 Return 0 if none found. */
648 get_signaled_thread (void)
650 struct thrdsinfo64 thrinf;
651 pthdb_tid_t ktid = 0;
656 if (getthrds (PIDGET (inferior_ptid), &thrinf,
657 sizeof (thrinf), &ktid, 1) != 1)
660 if (thrinf.ti_cursig == SIGTRAP)
661 return thrinf.ti_tid;
664 /* Didn't find any thread stopped on a SIGTRAP signal. */
668 /* Synchronize GDB's thread list with libpthdebug's.
670 There are some benefits of doing this every time the inferior stops:
672 - allows users to run thread-specific commands without needing to
673 run "info threads" first
675 - helps pthdb_tid_pthread() work properly (see "libpthdebug
676 peculiarities" at the top of this module)
678 - simplifies the demands placed on libpthdebug, which seems to
679 have difficulty with certain call patterns */
682 sync_threadlists (void)
684 int cmd, status, infpid;
685 int pcount, psize, pi, gcount, gi;
686 struct pd_thread *pbuf;
687 struct thread_info **gbuf, **g, *thread;
688 pthdb_pthread_t pdtid;
692 /* Accumulate an array of libpthdebug threads sorted by pthread id. */
696 pbuf = (struct pd_thread *) xmalloc (psize * sizeof *pbuf);
698 for (cmd = PTHDB_LIST_FIRST;; cmd = PTHDB_LIST_NEXT)
700 status = pthdb_pthread (pd_session, &pdtid, cmd);
701 if (status != PTHDB_SUCCESS || pdtid == PTHDB_INVALID_PTHREAD)
704 status = pthdb_pthread_ptid (pd_session, pdtid, &pthid);
705 if (status != PTHDB_SUCCESS || pthid == PTHDB_INVALID_PTID)
711 pbuf = (struct pd_thread *) xrealloc (pbuf,
712 psize * sizeof *pbuf);
714 pbuf[pcount].pdtid = pdtid;
715 pbuf[pcount].pthid = pthid;
719 for (pi = 0; pi < pcount; pi++)
721 status = pthdb_pthread_tid (pd_session, pbuf[pi].pdtid, &tid);
722 if (status != PTHDB_SUCCESS)
723 tid = PTHDB_INVALID_TID;
727 qsort (pbuf, pcount, sizeof *pbuf, pcmp);
729 /* Accumulate an array of GDB threads sorted by pid. */
732 iterate_over_threads (giter_count, &gcount);
733 g = gbuf = (struct thread_info **) xmalloc (gcount * sizeof *gbuf);
734 iterate_over_threads (giter_accum, &g);
735 qsort (gbuf, gcount, sizeof *gbuf, gcmp);
737 /* Apply differences between the two arrays to GDB's thread list. */
739 infpid = PIDGET (inferior_ptid);
740 for (pi = gi = 0; pi < pcount || gi < gcount;)
744 delete_thread (gbuf[gi]->ptid);
747 else if (gi == gcount)
749 thread = add_thread (BUILD_THREAD (pbuf[pi].pthid, infpid));
750 thread->private = xmalloc (sizeof (struct private_thread_info));
751 thread->private->pdtid = pbuf[pi].pdtid;
752 thread->private->tid = pbuf[pi].tid;
760 pptid = BUILD_THREAD (pbuf[pi].pthid, infpid);
761 gptid = gbuf[gi]->ptid;
762 pdtid = pbuf[pi].pdtid;
765 cmp_result = ptid_cmp (pptid, gptid);
769 gbuf[gi]->private->pdtid = pdtid;
770 gbuf[gi]->private->tid = tid;
774 else if (cmp_result > 0)
776 delete_thread (gptid);
781 thread = add_thread (pptid);
782 thread->private = xmalloc (sizeof (struct private_thread_info));
783 thread->private->pdtid = pdtid;
784 thread->private->tid = tid;
794 /* Iterate_over_threads() callback for locating a thread, using
795 the TID of its associated kernel thread. */
798 iter_tid (struct thread_info *thread, void *tidp)
800 const pthdb_tid_t tid = *(pthdb_tid_t *)tidp;
802 return (thread->private->tid == tid);
805 /* Synchronize libpthdebug's state with the inferior and with GDB,
806 generate a composite process/thread <pid> for the current thread,
807 set inferior_ptid to <pid> if SET_INFPID, and return <pid>. */
810 pd_update (int set_infpid)
815 struct thread_info *thread = NULL;
818 return inferior_ptid;
820 status = pthdb_session_update (pd_session);
821 if (status != PTHDB_SUCCESS)
822 return inferior_ptid;
826 /* Define "current thread" as one that just received a trap signal. */
828 tid = get_signaled_thread ();
830 thread = iterate_over_threads (iter_tid, &tid);
832 ptid = inferior_ptid;
837 inferior_ptid = ptid;
842 /* Try to start debugging threads in the current process.
843 If successful and SET_INFPID, set inferior_ptid to reflect the
847 pd_activate (int set_infpid)
851 status = pthdb_session_init (PD_USER, arch64 ? PEM_64BIT : PEM_32BIT,
852 PTHDB_FLAG_REGS, &pd_callbacks,
854 if (status != PTHDB_SUCCESS)
856 return inferior_ptid;
859 return pd_update (set_infpid);
862 /* Undo the effects of pd_activate(). */
869 pthdb_session_destroy (pd_session);
871 pid_to_prc (&inferior_ptid);
875 /* An object file has just been loaded. Check whether the current
876 application is pthreaded, and if so, prepare for thread debugging. */
883 struct minimal_symbol *ms;
885 /* Don't initialize twice. */
889 /* Check application word size. */
890 arch64 = register_size (target_gdbarch, 0) == 8;
892 /* Check whether the application is pthreaded. */
894 status = pthdb_session_pthreaded (PD_USER, PTHDB_FLAG_REGS,
895 &pd_callbacks, &stub_name);
896 if ((status != PTHDB_SUCCESS
897 && status != PTHDB_NOT_PTHREADED) || !stub_name)
900 /* Set a breakpoint on the returned stub function. */
901 if (!(ms = lookup_minimal_symbol (stub_name, NULL, NULL)))
903 pd_brk_addr = SYMBOL_VALUE_ADDRESS (ms);
904 if (!create_thread_event_breakpoint (target_gdbarch, pd_brk_addr))
907 /* Prepare for thread debugging. */
908 push_target (&aix_thread_ops);
911 /* If we're debugging a core file or an attached inferior, the
912 pthread library may already have been initialized, so try to
913 activate thread debugging. */
917 /* Undo the effects of pd_enable(). */
927 unpush_target (&aix_thread_ops);
930 /* new_objfile observer callback.
932 If OBJFILE is non-null, check whether a threaded application is
933 being debugged, and if so, prepare for thread debugging.
935 If OBJFILE is null, stop debugging threads. */
938 new_objfile (struct objfile *objfile)
946 /* Attach to process specified by ARGS. */
949 aix_thread_attach (struct target_ops *ops, char *args, int from_tty)
951 struct target_ops *beneath = find_target_beneath (ops);
953 beneath->to_attach (beneath, args, from_tty);
957 /* Detach from the process attached to by aix_thread_attach(). */
960 aix_thread_detach (struct target_ops *ops, char *args, int from_tty)
962 struct target_ops *beneath = find_target_beneath (ops);
965 beneath->to_detach (beneath, args, from_tty);
968 /* Tell the inferior process to continue running thread PID if != -1
969 and all threads otherwise. */
972 aix_thread_resume (struct target_ops *ops,
973 ptid_t ptid, int step, enum gdb_signal sig)
975 struct thread_info *thread;
980 struct cleanup *cleanup = save_inferior_ptid ();
981 struct target_ops *beneath = find_target_beneath (ops);
983 inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid));
984 beneath->to_resume (beneath, ptid, step, sig);
985 do_cleanups (cleanup);
989 thread = find_thread_ptid (ptid);
991 error (_("aix-thread resume: unknown pthread %ld"),
994 tid[0] = thread->private->tid;
995 if (tid[0] == PTHDB_INVALID_TID)
996 error (_("aix-thread resume: no tid for pthread %ld"),
1001 ptrace64aix (PTT_CONTINUE, tid[0], 1,
1002 gdb_signal_to_host (sig), (void *) tid);
1004 ptrace32 (PTT_CONTINUE, tid[0], (int *) 1,
1005 gdb_signal_to_host (sig), (void *) tid);
1009 /* Wait for thread/process ID if != -1 or for any thread otherwise.
1010 If an error occurs, return -1, else return the pid of the stopped
1014 aix_thread_wait (struct target_ops *ops,
1015 ptid_t ptid, struct target_waitstatus *status, int options)
1017 struct cleanup *cleanup = save_inferior_ptid ();
1018 struct target_ops *beneath = find_target_beneath (ops);
1022 inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid));
1023 ptid = beneath->to_wait (beneath, ptid, status, options);
1024 do_cleanups (cleanup);
1026 if (PIDGET (ptid) == -1)
1027 return pid_to_ptid (-1);
1029 /* Check whether libpthdebug might be ready to be initialized. */
1030 if (!pd_active && status->kind == TARGET_WAITKIND_STOPPED
1031 && status->value.sig == GDB_SIGNAL_TRAP)
1033 struct regcache *regcache = get_thread_regcache (ptid);
1034 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1036 if (regcache_read_pc (regcache)
1037 - gdbarch_decr_pc_after_break (gdbarch) == pd_brk_addr)
1038 return pd_activate (0);
1041 return pd_update (0);
1044 /* Record that the 64-bit general-purpose registers contain VALS. */
1047 supply_gprs64 (struct regcache *regcache, uint64_t *vals)
1049 struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
1052 for (regno = 0; regno < ppc_num_gprs; regno++)
1053 regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + regno,
1054 (char *) (vals + regno));
1057 /* Record that 32-bit register REGNO contains VAL. */
1060 supply_reg32 (struct regcache *regcache, int regno, uint32_t val)
1062 regcache_raw_supply (regcache, regno, (char *) &val);
1065 /* Record that the floating-point registers contain VALS. */
1068 supply_fprs (struct regcache *regcache, double *vals)
1070 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1071 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1074 /* This function should never be called on architectures without
1075 floating-point registers. */
1076 gdb_assert (ppc_floating_point_unit_p (gdbarch));
1078 for (regno = tdep->ppc_fp0_regnum;
1079 regno < tdep->ppc_fp0_regnum + ppc_num_fprs;
1081 regcache_raw_supply (regcache, regno,
1082 (char *) (vals + regno - tdep->ppc_fp0_regnum));
1085 /* Predicate to test whether given register number is a "special" register. */
1087 special_register_p (struct gdbarch *gdbarch, int regno)
1089 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1091 return regno == gdbarch_pc_regnum (gdbarch)
1092 || regno == tdep->ppc_ps_regnum
1093 || regno == tdep->ppc_cr_regnum
1094 || regno == tdep->ppc_lr_regnum
1095 || regno == tdep->ppc_ctr_regnum
1096 || regno == tdep->ppc_xer_regnum
1097 || (tdep->ppc_fpscr_regnum >= 0 && regno == tdep->ppc_fpscr_regnum)
1098 || (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum);
1102 /* Record that the special registers contain the specified 64-bit and
1106 supply_sprs64 (struct regcache *regcache,
1107 uint64_t iar, uint64_t msr, uint32_t cr,
1108 uint64_t lr, uint64_t ctr, uint32_t xer,
1111 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1112 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1114 regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch),
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,
1126 /* Record that the special registers contain the specified 32-bit
1130 supply_sprs32 (struct regcache *regcache,
1131 uint32_t iar, uint32_t msr, uint32_t cr,
1132 uint32_t lr, uint32_t ctr, uint32_t xer,
1135 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1136 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1138 regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch),
1140 regcache_raw_supply (regcache, tdep->ppc_ps_regnum, (char *) &msr);
1141 regcache_raw_supply (regcache, tdep->ppc_cr_regnum, (char *) &cr);
1142 regcache_raw_supply (regcache, tdep->ppc_lr_regnum, (char *) &lr);
1143 regcache_raw_supply (regcache, tdep->ppc_ctr_regnum, (char *) &ctr);
1144 regcache_raw_supply (regcache, tdep->ppc_xer_regnum, (char *) &xer);
1145 if (tdep->ppc_fpscr_regnum >= 0)
1146 regcache_raw_supply (regcache, tdep->ppc_fpscr_regnum,
1150 /* Fetch all registers from pthread PDTID, which doesn't have a kernel
1153 There's no way to query a single register from a non-kernel
1154 pthread, so there's no need for a single-register version of this
1158 fetch_regs_user_thread (struct regcache *regcache, pthdb_pthread_t pdtid)
1160 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1161 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1163 pthdb_context_t ctx;
1165 if (debug_aix_thread)
1166 fprintf_unfiltered (gdb_stdlog,
1167 "fetch_regs_user_thread %lx\n", (long) pdtid);
1168 status = pthdb_pthread_context (pd_session, pdtid, &ctx);
1169 if (status != PTHDB_SUCCESS)
1170 error (_("aix-thread: fetch_registers: pthdb_pthread_context returned %s"),
1171 pd_status2str (status));
1173 /* General-purpose registers. */
1176 supply_gprs64 (regcache, ctx.gpr);
1178 for (i = 0; i < ppc_num_gprs; i++)
1179 supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, ctx.gpr[i]);
1181 /* Floating-point registers. */
1183 if (ppc_floating_point_unit_p (gdbarch))
1184 supply_fprs (regcache, ctx.fpr);
1186 /* Special registers. */
1189 supply_sprs64 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr,
1190 ctx.xer, ctx.fpscr);
1192 supply_sprs32 (regcache, ctx.iar, ctx.msr, ctx.cr, ctx.lr, ctx.ctr,
1193 ctx.xer, ctx.fpscr);
1196 /* Fetch register REGNO if != -1 or all registers otherwise from
1199 AIX provides a way to query all of a kernel thread's GPRs, FPRs, or
1200 SPRs, but there's no way to query individual registers within those
1201 groups. Therefore, if REGNO != -1, this function fetches an entire
1204 Unfortunately, kernel thread register queries often fail with
1205 EPERM, indicating that the thread is in kernel space. This breaks
1206 backtraces of threads other than the current one. To make that
1207 breakage obvious without throwing an error to top level (which is
1208 bad e.g. during "info threads" output), zero registers that can't
1212 fetch_regs_kernel_thread (struct regcache *regcache, int regno,
1215 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1216 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1217 uint64_t gprs64[ppc_num_gprs];
1218 uint32_t gprs32[ppc_num_gprs];
1219 double fprs[ppc_num_fprs];
1220 struct ptxsprs sprs64;
1221 struct ptsprs sprs32;
1224 if (debug_aix_thread)
1225 fprintf_unfiltered (gdb_stdlog,
1226 "fetch_regs_kernel_thread tid=%lx regno=%d arch64=%d\n",
1227 (long) tid, regno, arch64);
1229 /* General-purpose registers. */
1231 || (tdep->ppc_gp0_regnum <= regno
1232 && regno < tdep->ppc_gp0_regnum + ppc_num_gprs))
1236 if (!ptrace64aix (PTT_READ_GPRS, tid,
1237 (unsigned long) gprs64, 0, NULL))
1238 memset (gprs64, 0, sizeof (gprs64));
1239 supply_gprs64 (regcache, gprs64);
1243 if (!ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL))
1244 memset (gprs32, 0, sizeof (gprs32));
1245 for (i = 0; i < ppc_num_gprs; i++)
1246 supply_reg32 (regcache, tdep->ppc_gp0_regnum + i, gprs32[i]);
1250 /* Floating-point registers. */
1252 if (ppc_floating_point_unit_p (gdbarch)
1254 || (regno >= tdep->ppc_fp0_regnum
1255 && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)))
1257 if (!ptrace32 (PTT_READ_FPRS, tid, (void *) fprs, 0, NULL))
1258 memset (fprs, 0, sizeof (fprs));
1259 supply_fprs (regcache, fprs);
1262 /* Special-purpose registers. */
1264 if (regno == -1 || special_register_p (gdbarch, regno))
1268 if (!ptrace64aix (PTT_READ_SPRS, tid,
1269 (unsigned long) &sprs64, 0, NULL))
1270 memset (&sprs64, 0, sizeof (sprs64));
1271 supply_sprs64 (regcache, sprs64.pt_iar, sprs64.pt_msr,
1272 sprs64.pt_cr, sprs64.pt_lr, sprs64.pt_ctr,
1273 sprs64.pt_xer, sprs64.pt_fpscr);
1277 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1279 if (!ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL))
1280 memset (&sprs32, 0, sizeof (sprs32));
1281 supply_sprs32 (regcache, sprs32.pt_iar, sprs32.pt_msr, sprs32.pt_cr,
1282 sprs32.pt_lr, sprs32.pt_ctr, sprs32.pt_xer,
1285 if (tdep->ppc_mq_regnum >= 0)
1286 regcache_raw_supply (regcache, tdep->ppc_mq_regnum,
1287 (char *) &sprs32.pt_mq);
1292 /* Fetch register REGNO if != -1 or all registers otherwise in the
1293 thread/process specified by inferior_ptid. */
1296 aix_thread_fetch_registers (struct target_ops *ops,
1297 struct regcache *regcache, int regno)
1299 struct thread_info *thread;
1301 struct target_ops *beneath = find_target_beneath (ops);
1303 if (!PD_TID (inferior_ptid))
1304 beneath->to_fetch_registers (beneath, regcache, regno);
1307 thread = find_thread_ptid (inferior_ptid);
1308 tid = thread->private->tid;
1310 if (tid == PTHDB_INVALID_TID)
1311 fetch_regs_user_thread (regcache, thread->private->pdtid);
1313 fetch_regs_kernel_thread (regcache, regno, tid);
1317 /* Store the gp registers into an array of uint32_t or uint64_t. */
1320 fill_gprs64 (const struct regcache *regcache, uint64_t *vals)
1322 struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
1325 for (regno = 0; regno < ppc_num_gprs; regno++)
1326 if (REG_VALID == regcache_register_status (regcache,
1327 tdep->ppc_gp0_regnum + regno))
1328 regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + regno,
1333 fill_gprs32 (const struct regcache *regcache, uint32_t *vals)
1335 struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
1338 for (regno = 0; regno < ppc_num_gprs; regno++)
1339 if (REG_VALID == regcache_register_status (regcache,
1340 tdep->ppc_gp0_regnum + regno))
1341 regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + regno,
1345 /* Store the floating point registers into a double array. */
1347 fill_fprs (const struct regcache *regcache, double *vals)
1349 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1350 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1353 /* This function should never be called on architectures without
1354 floating-point registers. */
1355 gdb_assert (ppc_floating_point_unit_p (gdbarch));
1357 for (regno = tdep->ppc_fp0_regnum;
1358 regno < tdep->ppc_fp0_regnum + ppc_num_fprs;
1360 if (REG_VALID == regcache_register_status (regcache, regno))
1361 regcache_raw_collect (regcache, regno,
1362 vals + regno - tdep->ppc_fp0_regnum);
1365 /* Store the special registers into the specified 64-bit and 32-bit
1369 fill_sprs64 (const struct regcache *regcache,
1370 uint64_t *iar, uint64_t *msr, uint32_t *cr,
1371 uint64_t *lr, uint64_t *ctr, uint32_t *xer,
1374 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1375 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1377 /* Verify that the size of the size of the IAR buffer is the
1378 same as the raw size of the PC (in the register cache). If
1379 they're not, then either GDB has been built incorrectly, or
1380 there's some other kind of internal error. To be really safe,
1381 we should check all of the sizes. */
1382 gdb_assert (sizeof (*iar) == register_size
1383 (gdbarch, gdbarch_pc_regnum (gdbarch)));
1385 if (REG_VALID == regcache_register_status (regcache,
1386 gdbarch_pc_regnum (gdbarch)))
1387 regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), iar);
1388 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_ps_regnum))
1389 regcache_raw_collect (regcache, tdep->ppc_ps_regnum, msr);
1390 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_cr_regnum))
1391 regcache_raw_collect (regcache, tdep->ppc_cr_regnum, cr);
1392 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_lr_regnum))
1393 regcache_raw_collect (regcache, tdep->ppc_lr_regnum, lr);
1394 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_ctr_regnum))
1395 regcache_raw_collect (regcache, tdep->ppc_ctr_regnum, ctr);
1396 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_xer_regnum))
1397 regcache_raw_collect (regcache, tdep->ppc_xer_regnum, xer);
1398 if (tdep->ppc_fpscr_regnum >= 0
1399 && REG_VALID == regcache_register_status (regcache,
1400 tdep->ppc_fpscr_regnum))
1401 regcache_raw_collect (regcache, tdep->ppc_fpscr_regnum, fpscr);
1405 fill_sprs32 (const struct regcache *regcache,
1406 uint32_t *iar, uint32_t *msr, uint32_t *cr,
1407 uint32_t *lr, uint32_t *ctr, uint32_t *xer,
1410 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1411 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1413 /* Verify that the size of the size of the IAR buffer is the
1414 same as the raw size of the PC (in the register cache). If
1415 they're not, then either GDB has been built incorrectly, or
1416 there's some other kind of internal error. To be really safe,
1417 we should check all of the sizes. */
1418 gdb_assert (sizeof (*iar) == register_size (gdbarch,
1419 gdbarch_pc_regnum (gdbarch)));
1421 if (REG_VALID == regcache_register_status (regcache,
1422 gdbarch_pc_regnum (gdbarch)))
1423 regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), iar);
1424 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_ps_regnum))
1425 regcache_raw_collect (regcache, tdep->ppc_ps_regnum, msr);
1426 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_cr_regnum))
1427 regcache_raw_collect (regcache, tdep->ppc_cr_regnum, cr);
1428 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_lr_regnum))
1429 regcache_raw_collect (regcache, tdep->ppc_lr_regnum, lr);
1430 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_ctr_regnum))
1431 regcache_raw_collect (regcache, tdep->ppc_ctr_regnum, ctr);
1432 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_xer_regnum))
1433 regcache_raw_collect (regcache, tdep->ppc_xer_regnum, xer);
1434 if (tdep->ppc_fpscr_regnum >= 0
1435 && REG_VALID == regcache_register_status (regcache, tdep->ppc_fpscr_regnum))
1436 regcache_raw_collect (regcache, tdep->ppc_fpscr_regnum, fpscr);
1439 /* Store all registers into pthread PDTID, which doesn't have a kernel
1442 It's possible to store a single register into a non-kernel pthread,
1443 but I doubt it's worth the effort. */
1446 store_regs_user_thread (const struct regcache *regcache, pthdb_pthread_t pdtid)
1448 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1449 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1451 pthdb_context_t ctx;
1456 if (debug_aix_thread)
1457 fprintf_unfiltered (gdb_stdlog,
1458 "store_regs_user_thread %lx\n", (long) pdtid);
1460 /* Retrieve the thread's current context for its non-register
1462 status = pthdb_pthread_context (pd_session, pdtid, &ctx);
1463 if (status != PTHDB_SUCCESS)
1464 error (_("aix-thread: store_registers: pthdb_pthread_context returned %s"),
1465 pd_status2str (status));
1467 /* Collect general-purpose register values from the regcache. */
1469 for (i = 0; i < ppc_num_gprs; i++)
1470 if (REG_VALID == regcache_register_status (regcache,
1471 tdep->ppc_gp0_regnum + i))
1475 regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + i,
1481 regcache_raw_collect (regcache, tdep->ppc_gp0_regnum + i,
1487 /* Collect floating-point register values from the regcache. */
1488 if (ppc_floating_point_unit_p (gdbarch))
1489 fill_fprs (regcache, ctx.fpr);
1491 /* Special registers (always kept in ctx as 64 bits). */
1494 fill_sprs64 (regcache, &ctx.iar, &ctx.msr, &ctx.cr, &ctx.lr, &ctx.ctr,
1495 &ctx.xer, &ctx.fpscr);
1499 /* Problem: ctx.iar etc. are 64 bits, but raw_registers are 32.
1500 Solution: use 32-bit temp variables. */
1501 uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer,
1504 fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr, &tmp_ctr,
1505 &tmp_xer, &tmp_fpscr);
1506 if (REG_VALID == regcache_register_status (regcache,
1507 gdbarch_pc_regnum (gdbarch)))
1509 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_ps_regnum))
1511 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_cr_regnum))
1513 if (REG_VALID == regcache_register_status (regcache, tdep->ppc_lr_regnum))
1515 if (REG_VALID == regcache_register_status (regcache,
1516 tdep->ppc_ctr_regnum))
1518 if (REG_VALID == regcache_register_status (regcache,
1519 tdep->ppc_xer_regnum))
1521 if (REG_VALID == regcache_register_status (regcache,
1522 tdep->ppc_xer_regnum))
1523 ctx.fpscr = tmp_fpscr;
1526 status = pthdb_pthread_setcontext (pd_session, pdtid, &ctx);
1527 if (status != PTHDB_SUCCESS)
1528 error (_("aix-thread: store_registers: "
1529 "pthdb_pthread_setcontext returned %s"),
1530 pd_status2str (status));
1533 /* Store register REGNO if != -1 or all registers otherwise into
1536 AIX provides a way to set all of a kernel thread's GPRs, FPRs, or
1537 SPRs, but there's no way to set individual registers within those
1538 groups. Therefore, if REGNO != -1, this function stores an entire
1542 store_regs_kernel_thread (const struct regcache *regcache, int regno,
1545 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1546 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1547 uint64_t gprs64[ppc_num_gprs];
1548 uint32_t gprs32[ppc_num_gprs];
1549 double fprs[ppc_num_fprs];
1550 struct ptxsprs sprs64;
1551 struct ptsprs sprs32;
1554 if (debug_aix_thread)
1555 fprintf_unfiltered (gdb_stdlog,
1556 "store_regs_kernel_thread tid=%lx regno=%d\n",
1559 /* General-purpose registers. */
1561 || (tdep->ppc_gp0_regnum <= regno
1562 && regno < tdep->ppc_gp0_regnum + ppc_num_fprs))
1566 /* Pre-fetch: some regs may not be in the cache. */
1567 ptrace64aix (PTT_READ_GPRS, tid, (unsigned long) gprs64, 0, NULL);
1568 fill_gprs64 (regcache, gprs64);
1569 ptrace64aix (PTT_WRITE_GPRS, tid, (unsigned long) gprs64, 0, NULL);
1573 /* Pre-fetch: some regs may not be in the cache. */
1574 ptrace32 (PTT_READ_GPRS, tid, gprs32, 0, NULL);
1575 fill_gprs32 (regcache, gprs32);
1576 ptrace32 (PTT_WRITE_GPRS, tid, gprs32, 0, NULL);
1580 /* Floating-point registers. */
1582 if (ppc_floating_point_unit_p (gdbarch)
1584 || (regno >= tdep->ppc_fp0_regnum
1585 && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)))
1587 /* Pre-fetch: some regs may not be in the cache. */
1588 ptrace32 (PTT_READ_FPRS, tid, (void *) fprs, 0, NULL);
1589 fill_fprs (regcache, fprs);
1590 ptrace32 (PTT_WRITE_FPRS, tid, (void *) fprs, 0, NULL);
1593 /* Special-purpose registers. */
1595 if (regno == -1 || special_register_p (gdbarch, regno))
1599 /* Pre-fetch: some registers won't be in the cache. */
1600 ptrace64aix (PTT_READ_SPRS, tid,
1601 (unsigned long) &sprs64, 0, NULL);
1602 fill_sprs64 (regcache, &sprs64.pt_iar, &sprs64.pt_msr,
1603 &sprs64.pt_cr, &sprs64.pt_lr, &sprs64.pt_ctr,
1604 &sprs64.pt_xer, &sprs64.pt_fpscr);
1605 ptrace64aix (PTT_WRITE_SPRS, tid,
1606 (unsigned long) &sprs64, 0, NULL);
1610 /* The contents of "struct ptspr" were declared as "unsigned
1611 long" up to AIX 5.2, but are "unsigned int" since 5.3.
1612 Use temporaries to work around this problem. Also, add an
1613 assert here to make sure we fail if the system header files
1614 use "unsigned long", and the size of that type is not what
1615 the headers expect. */
1616 uint32_t tmp_iar, tmp_msr, tmp_cr, tmp_lr, tmp_ctr, tmp_xer,
1619 gdb_assert (sizeof (sprs32.pt_iar) == 4);
1621 /* Pre-fetch: some registers won't be in the cache. */
1622 ptrace32 (PTT_READ_SPRS, tid, (int *) &sprs32, 0, NULL);
1624 fill_sprs32 (regcache, &tmp_iar, &tmp_msr, &tmp_cr, &tmp_lr,
1625 &tmp_ctr, &tmp_xer, &tmp_fpscr);
1627 sprs32.pt_iar = tmp_iar;
1628 sprs32.pt_msr = tmp_msr;
1629 sprs32.pt_cr = tmp_cr;
1630 sprs32.pt_lr = tmp_lr;
1631 sprs32.pt_ctr = tmp_ctr;
1632 sprs32.pt_xer = tmp_xer;
1633 sprs32.pt_fpscr = tmp_fpscr;
1635 if (tdep->ppc_mq_regnum >= 0)
1636 if (REG_VALID == regcache_register_status (regcache,
1637 tdep->ppc_mq_regnum))
1638 regcache_raw_collect (regcache, tdep->ppc_mq_regnum,
1641 ptrace32 (PTT_WRITE_SPRS, tid, (int *) &sprs32, 0, NULL);
1646 /* Store gdb's current view of the register set into the
1647 thread/process specified by inferior_ptid. */
1650 aix_thread_store_registers (struct target_ops *ops,
1651 struct regcache *regcache, int regno)
1653 struct thread_info *thread;
1655 struct target_ops *beneath = find_target_beneath (ops);
1657 if (!PD_TID (inferior_ptid))
1658 beneath->to_store_registers (beneath, regcache, regno);
1661 thread = find_thread_ptid (inferior_ptid);
1662 tid = thread->private->tid;
1664 if (tid == PTHDB_INVALID_TID)
1665 store_regs_user_thread (regcache, thread->private->pdtid);
1667 store_regs_kernel_thread (regcache, regno, tid);
1671 /* Attempt a transfer all LEN bytes starting at OFFSET between the
1672 inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer.
1673 Return the number of bytes actually transferred. */
1676 aix_thread_xfer_partial (struct target_ops *ops, enum target_object object,
1677 const char *annex, gdb_byte *readbuf,
1678 const gdb_byte *writebuf,
1679 ULONGEST offset, LONGEST len)
1681 struct cleanup *old_chain = save_inferior_ptid ();
1683 struct target_ops *beneath = find_target_beneath (ops);
1685 inferior_ptid = pid_to_ptid (PIDGET (inferior_ptid));
1686 xfer = beneath->to_xfer_partial (beneath, object, annex,
1687 readbuf, writebuf, offset, len);
1689 do_cleanups (old_chain);
1693 /* Clean up after the inferior exits. */
1696 aix_thread_mourn_inferior (struct target_ops *ops)
1698 struct target_ops *beneath = find_target_beneath (ops);
1701 beneath->to_mourn_inferior (beneath);
1704 /* Return whether thread PID is still valid. */
1707 aix_thread_thread_alive (struct target_ops *ops, ptid_t ptid)
1709 struct target_ops *beneath = find_target_beneath (ops);
1712 return beneath->to_thread_alive (beneath, ptid);
1714 /* We update the thread list every time the child stops, so all
1715 valid threads should be in the thread list. */
1716 return in_thread_list (ptid);
1719 /* Return a printable representation of composite PID for use in
1720 "info threads" output. */
1723 aix_thread_pid_to_str (struct target_ops *ops, ptid_t ptid)
1725 static char *ret = NULL;
1726 struct target_ops *beneath = find_target_beneath (ops);
1729 return beneath->to_pid_to_str (beneath, ptid);
1731 /* Free previous return value; a new one will be allocated by
1735 ret = xstrprintf (_("Thread %ld"), ptid_get_tid (ptid));
1739 /* Return a printable representation of extra information about
1740 THREAD, for use in "info threads" output. */
1743 aix_thread_extra_thread_info (struct thread_info *thread)
1745 struct ui_file *buf;
1747 pthdb_pthread_t pdtid;
1749 pthdb_state_t state;
1750 pthdb_suspendstate_t suspendstate;
1751 pthdb_detachstate_t detachstate;
1753 static char *ret = NULL;
1755 if (!PD_TID (thread->ptid))
1758 buf = mem_fileopen ();
1760 pdtid = thread->private->pdtid;
1761 tid = thread->private->tid;
1763 if (tid != PTHDB_INVALID_TID)
1764 /* i18n: Like "thread-identifier %d, [state] running, suspended" */
1765 fprintf_unfiltered (buf, _("tid %d"), (int)tid);
1767 status = pthdb_pthread_state (pd_session, pdtid, &state);
1768 if (status != PTHDB_SUCCESS)
1770 fprintf_unfiltered (buf, ", %s", state2str (state));
1772 status = pthdb_pthread_suspendstate (pd_session, pdtid,
1774 if (status == PTHDB_SUCCESS && suspendstate == PSS_SUSPENDED)
1775 /* i18n: Like "Thread-Id %d, [state] running, suspended" */
1776 fprintf_unfiltered (buf, _(", suspended"));
1778 status = pthdb_pthread_detachstate (pd_session, pdtid,
1780 if (status == PTHDB_SUCCESS && detachstate == PDS_DETACHED)
1781 /* i18n: Like "Thread-Id %d, [state] running, detached" */
1782 fprintf_unfiltered (buf, _(", detached"));
1784 pthdb_pthread_cancelpend (pd_session, pdtid, &cancelpend);
1785 if (status == PTHDB_SUCCESS && cancelpend)
1786 /* i18n: Like "Thread-Id %d, [state] running, cancel pending" */
1787 fprintf_unfiltered (buf, _(", cancel pending"));
1789 ui_file_write (buf, "", 1);
1791 xfree (ret); /* Free old buffer. */
1793 ret = ui_file_xstrdup (buf, NULL);
1794 ui_file_delete (buf);
1800 aix_thread_get_ada_task_ptid (long lwp, long thread)
1802 return ptid_build (ptid_get_pid (inferior_ptid), 0, thread);
1805 /* Initialize target aix_thread_ops. */
1808 init_aix_thread_ops (void)
1810 aix_thread_ops.to_shortname = "aix-threads";
1811 aix_thread_ops.to_longname = _("AIX pthread support");
1812 aix_thread_ops.to_doc = _("AIX pthread support");
1814 aix_thread_ops.to_attach = aix_thread_attach;
1815 aix_thread_ops.to_detach = aix_thread_detach;
1816 aix_thread_ops.to_resume = aix_thread_resume;
1817 aix_thread_ops.to_wait = aix_thread_wait;
1818 aix_thread_ops.to_fetch_registers = aix_thread_fetch_registers;
1819 aix_thread_ops.to_store_registers = aix_thread_store_registers;
1820 aix_thread_ops.to_xfer_partial = aix_thread_xfer_partial;
1821 /* No need for aix_thread_ops.to_create_inferior, because we activate thread
1822 debugging when the inferior reaches pd_brk_addr. */
1823 aix_thread_ops.to_mourn_inferior = aix_thread_mourn_inferior;
1824 aix_thread_ops.to_thread_alive = aix_thread_thread_alive;
1825 aix_thread_ops.to_pid_to_str = aix_thread_pid_to_str;
1826 aix_thread_ops.to_extra_thread_info = aix_thread_extra_thread_info;
1827 aix_thread_ops.to_get_ada_task_ptid = aix_thread_get_ada_task_ptid;
1828 aix_thread_ops.to_stratum = thread_stratum;
1829 aix_thread_ops.to_magic = OPS_MAGIC;
1832 /* Module startup initialization function, automagically called by
1835 void _initialize_aix_thread (void);
1838 _initialize_aix_thread (void)
1840 init_aix_thread_ops ();
1841 add_target (&aix_thread_ops);
1843 /* Notice when object files get loaded and unloaded. */
1844 observer_attach_new_objfile (new_objfile);
1846 add_setshow_boolean_cmd ("aix-thread", class_maintenance, &debug_aix_thread,
1847 _("Set debugging of AIX thread module."),
1848 _("Show debugging of AIX thread module."),
1849 _("Enables debugging output (used to debug GDB)."),
1851 /* FIXME: i18n: Debugging of AIX thread
1852 module is \"%d\". */
1853 &setdebuglist, &showdebuglist);