1 /* Machine independent support for QNX Neutrino /proc (process file system)
2 for GDB. Written by Colin Burgess at QNX Software Systems Limited.
4 Copyright (C) 2003-2015 Free Software Foundation, Inc.
6 Contributed by QNX Software Systems Ltd.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include <sys/debug.h>
28 #include <sys/procfs.h>
29 #include <sys/neutrino.h>
30 #include <sys/syspage.h>
32 #include <sys/netmgr.h>
39 #include "gdbthread.h"
44 #include "inf-child.h"
45 #include "common/filestuff.h"
48 #define _DEBUG_FLAG_TRACE (_DEBUG_FLAG_TRACE_EXEC|_DEBUG_FLAG_TRACE_RD|\
49 _DEBUG_FLAG_TRACE_WR|_DEBUG_FLAG_TRACE_MODIFY)
53 static sighandler_t ofunc;
55 static procfs_run run;
57 static ptid_t do_attach (ptid_t ptid);
59 static int procfs_can_use_hw_breakpoint (struct target_ops *self,
60 enum bptype, int, int);
62 static int procfs_insert_hw_watchpoint (struct target_ops *self,
63 CORE_ADDR addr, int len,
64 enum target_hw_bp_type type,
65 struct expression *cond);
67 static int procfs_remove_hw_watchpoint (struct target_ops *self,
68 CORE_ADDR addr, int len,
69 enum target_hw_bp_type type,
70 struct expression *cond);
72 static int procfs_stopped_by_watchpoint (struct target_ops *ops);
74 /* These two globals are only ever set in procfs_open_1, but are
75 referenced elsewhere. 'nto_procfs_node' is a flag used to say
76 whether we are local, or we should get the current node descriptor
77 for the remote QNX node. */
79 static unsigned nto_procfs_node = ND_LOCAL_NODE;
81 /* Return the current QNX Node, or error out. This is a simple
82 wrapper for the netmgr_strtond() function. The reason this
83 is required is because QNX node descriptors are transient so
84 we have to re-acquire them every time. */
90 if (ND_NODE_CMP (nto_procfs_node, ND_LOCAL_NODE) == 0
94 node = netmgr_strtond (nodestr, 0);
96 error (_("Lost the QNX node. Debug session probably over."));
101 static enum gdb_osabi
102 procfs_is_nto_target (bfd *abfd)
104 return GDB_OSABI_QNXNTO;
107 /* This is called when we call 'target native' or 'target procfs
108 <arg>' from the (gdb) prompt. For QNX6 (nto), the only valid arg
109 will be a QNX node string, eg: "/net/some_node". If arg is not a
110 valid QNX node, we will default to local. */
112 procfs_open_1 (struct target_ops *ops, const char *arg, int from_tty)
117 procfs_sysinfo *sysinfo;
118 struct cleanup *cleanups;
119 char nto_procfs_path[PATH_MAX];
121 /* Offer to kill previous inferiors before opening this target. */
122 target_preopen (from_tty);
124 nto_is_nto_target = procfs_is_nto_target;
126 /* Set the default node used for spawning to this one,
127 and only override it if there is a valid arg. */
132 nto_procfs_node = ND_LOCAL_NODE;
133 nodestr = (arg != NULL) ? xstrdup (arg) : NULL;
139 nto_procfs_node = netmgr_strtond (nodestr, &endstr);
140 if (nto_procfs_node == -1)
142 if (errno == ENOTSUP)
143 printf_filtered ("QNX Net Manager not found.\n");
144 printf_filtered ("Invalid QNX node %s: error %d (%s).\n", nodestr,
145 errno, safe_strerror (errno));
148 nto_procfs_node = ND_LOCAL_NODE;
152 if (*(endstr - 1) == '/')
158 snprintf (nto_procfs_path, PATH_MAX - 1, "%s%s",
159 (nodestr != NULL) ? nodestr : "", "/proc");
161 fd = open (nto_procfs_path, O_RDONLY);
164 printf_filtered ("Error opening %s : %d (%s)\n", nto_procfs_path, errno,
165 safe_strerror (errno));
166 error (_("Invalid procfs arg"));
168 cleanups = make_cleanup_close (fd);
170 sysinfo = (void *) buffer;
171 if (devctl (fd, DCMD_PROC_SYSINFO, sysinfo, sizeof buffer, 0) != EOK)
173 printf_filtered ("Error getting size: %d (%s)\n", errno,
174 safe_strerror (errno));
175 error (_("Devctl failed."));
179 total_size = sysinfo->total_size;
180 sysinfo = alloca (total_size);
183 printf_filtered ("Memory error: %d (%s)\n", errno,
184 safe_strerror (errno));
185 error (_("alloca failed."));
189 if (devctl (fd, DCMD_PROC_SYSINFO, sysinfo, total_size, 0) != EOK)
191 printf_filtered ("Error getting sysinfo: %d (%s)\n", errno,
192 safe_strerror (errno));
193 error (_("Devctl failed."));
198 nto_map_arch_to_cputype (gdbarch_bfd_arch_info
199 (target_gdbarch ())->arch_name))
200 error (_("Invalid target CPU."));
204 do_cleanups (cleanups);
206 inf_child_open_target (ops, arg, from_tty);
207 printf_filtered ("Debugging using %s\n", nto_procfs_path);
211 procfs_set_thread (ptid_t ptid)
215 tid = ptid_get_tid (ptid);
216 devctl (ctl_fd, DCMD_PROC_CURTHREAD, &tid, sizeof (tid), 0);
219 /* Return nonzero if the thread TH is still alive. */
221 procfs_thread_alive (struct target_ops *ops, ptid_t ptid)
225 procfs_status status;
228 tid = ptid_get_tid (ptid);
229 pid = ptid_get_pid (ptid);
231 if (kill (pid, 0) == -1)
235 if ((err = devctl (ctl_fd, DCMD_PROC_TIDSTATUS,
236 &status, sizeof (status), 0)) != EOK)
239 /* Thread is alive or dead but not yet joined,
240 or dead and there is an alive (or dead unjoined) thread with
243 If the tid is not the same as requested, requested tid is dead. */
244 return (status.tid == tid) && (status.state != STATE_DEAD);
248 update_thread_private_data_name (struct thread_info *new_thread,
252 struct private_thread_info *pti;
254 gdb_assert (newname != NULL);
255 gdb_assert (new_thread != NULL);
256 newnamelen = strlen (newname);
257 if (!new_thread->priv)
259 new_thread->priv = xmalloc (offsetof (struct private_thread_info,
262 memcpy (new_thread->priv->name, newname, newnamelen + 1);
264 else if (strcmp (newname, new_thread->priv->name) != 0)
266 /* Reallocate if neccessary. */
267 int oldnamelen = strlen (new_thread->priv->name);
269 if (oldnamelen < newnamelen)
270 new_thread->priv = xrealloc (new_thread->priv,
271 offsetof (struct private_thread_info,
274 memcpy (new_thread->priv->name, newname, newnamelen + 1);
279 update_thread_private_data (struct thread_info *new_thread,
280 pthread_t tid, int state, int flags)
282 struct private_thread_info *pti;
284 struct _thread_name *tn;
285 procfs_threadctl tctl;
287 #if _NTO_VERSION > 630
288 gdb_assert (new_thread != NULL);
290 if (devctl (ctl_fd, DCMD_PROC_INFO, &pidinfo,
291 sizeof(pidinfo), 0) != EOK)
294 memset (&tctl, 0, sizeof (tctl));
295 tctl.cmd = _NTO_TCTL_NAME;
296 tn = (struct _thread_name *) (&tctl.data);
298 /* Fetch name for the given thread. */
300 tn->name_buf_len = sizeof (tctl.data) - sizeof (*tn);
301 tn->new_name_len = -1; /* Getting, not setting. */
302 if (devctl (ctl_fd, DCMD_PROC_THREADCTL, &tctl, sizeof (tctl), NULL) != EOK)
303 tn->name_buf[0] = '\0';
305 tn->name_buf[_NTO_THREAD_NAME_MAX] = '\0';
307 update_thread_private_data_name (new_thread, tn->name_buf);
309 pti = (struct private_thread_info *) new_thread->priv;
313 #endif /* _NTO_VERSION */
317 procfs_update_thread_list (struct target_ops *ops)
319 procfs_status status;
323 struct thread_info *new_thread;
330 pid = ptid_get_pid (inferior_ptid);
334 for (tid = 1;; ++tid)
336 if (status.tid == tid
337 && (devctl (ctl_fd, DCMD_PROC_TIDSTATUS, &status, sizeof (status), 0)
340 if (status.tid != tid)
341 /* The reason why this would not be equal is that devctl might have
342 returned different tid, meaning the requested tid no longer exists
343 (e.g. thread exited). */
345 ptid = ptid_build (pid, 0, tid);
346 new_thread = find_thread_ptid (ptid);
348 new_thread = add_thread (ptid);
349 update_thread_private_data (new_thread, tid, status.state, 0);
356 do_closedir_cleanup (void *dir)
362 procfs_pidlist (char *args, int from_tty)
365 struct dirent *dirp = NULL;
367 procfs_info *pidinfo = NULL;
368 procfs_debuginfo *info = NULL;
369 procfs_status *status = NULL;
370 pid_t num_threads = 0;
373 struct cleanup *cleanups;
374 char procfs_dir[PATH_MAX];
376 snprintf (procfs_dir, sizeof (procfs_dir), "%s%s",
377 (nodestr != NULL) ? nodestr : "", "/proc");
379 dp = opendir (procfs_dir);
382 fprintf_unfiltered (gdb_stderr, "failed to opendir \"%s\" - %d (%s)",
383 procfs_dir, errno, safe_strerror (errno));
387 cleanups = make_cleanup (do_closedir_cleanup, dp);
389 /* Start scan at first pid. */
395 struct cleanup *inner_cleanup;
397 /* Get the right pid and procfs path for the pid. */
403 do_cleanups (cleanups);
406 snprintf (buf, sizeof (buf), "%s%s/%s/as",
407 (nodestr != NULL) ? nodestr : "",
408 "/proc", dirp->d_name);
409 pid = atoi (dirp->d_name);
413 /* Open the procfs path. */
414 fd = open (buf, O_RDONLY);
417 fprintf_unfiltered (gdb_stderr, "failed to open %s - %d (%s)\n",
418 buf, errno, safe_strerror (errno));
421 inner_cleanup = make_cleanup_close (fd);
423 pidinfo = (procfs_info *) buf;
424 if (devctl (fd, DCMD_PROC_INFO, pidinfo, sizeof (buf), 0) != EOK)
426 fprintf_unfiltered (gdb_stderr,
427 "devctl DCMD_PROC_INFO failed - %d (%s)\n",
428 errno, safe_strerror (errno));
431 num_threads = pidinfo->num_threads;
433 info = (procfs_debuginfo *) buf;
434 if (devctl (fd, DCMD_PROC_MAPDEBUG_BASE, info, sizeof (buf), 0) != EOK)
435 strcpy (name, "unavailable");
437 strcpy (name, info->path);
439 /* Collect state info on all the threads. */
440 status = (procfs_status *) buf;
441 for (status->tid = 1; status->tid <= num_threads; status->tid++)
444 = devctl (fd, DCMD_PROC_TIDSTATUS, status, sizeof (buf), 0);
445 printf_filtered ("%s - %d", name, pid);
446 if (err == EOK && status->tid != 0)
447 printf_filtered ("/%d\n", status->tid);
450 printf_filtered ("\n");
455 do_cleanups (inner_cleanup);
457 while (dirp != NULL);
459 do_cleanups (cleanups);
464 procfs_meminfo (char *args, int from_tty)
466 procfs_mapinfo *mapinfos = NULL;
467 static int num_mapinfos = 0;
468 procfs_mapinfo *mapinfo_p, *mapinfo_p2;
469 int flags = ~0, err, num, i, j;
473 procfs_debuginfo info;
474 char buff[_POSIX_PATH_MAX];
482 unsigned debug_vaddr;
483 unsigned long long offset;
488 unsigned long long ino;
495 /* Get the number of map entrys. */
496 err = devctl (ctl_fd, DCMD_PROC_MAPINFO, NULL, 0, &num);
499 printf ("failed devctl num mapinfos - %d (%s)\n", err,
500 safe_strerror (err));
504 mapinfos = XNEWVEC (procfs_mapinfo, num);
507 mapinfo_p = mapinfos;
509 /* Fill the map entrys. */
510 err = devctl (ctl_fd, DCMD_PROC_MAPINFO, mapinfo_p, num
511 * sizeof (procfs_mapinfo), &num);
514 printf ("failed devctl mapinfos - %d (%s)\n", err, safe_strerror (err));
519 num = min (num, num_mapinfos);
521 /* Run through the list of mapinfos, and store the data and text info
522 so we can print it at the bottom of the loop. */
523 for (mapinfo_p = mapinfos, i = 0; i < num; i++, mapinfo_p++)
525 if (!(mapinfo_p->flags & flags))
528 if (mapinfo_p->ino == 0) /* Already visited. */
531 map.info.vaddr = mapinfo_p->vaddr;
533 err = devctl (ctl_fd, DCMD_PROC_MAPDEBUG, &map, sizeof (map), 0);
537 memset (&printme, 0, sizeof printme);
538 printme.dev = mapinfo_p->dev;
539 printme.ino = mapinfo_p->ino;
540 printme.text.addr = mapinfo_p->vaddr;
541 printme.text.size = mapinfo_p->size;
542 printme.text.flags = mapinfo_p->flags;
543 printme.text.offset = mapinfo_p->offset;
544 printme.text.debug_vaddr = map.info.vaddr;
545 strcpy (printme.name, map.info.path);
547 /* Check for matching data. */
548 for (mapinfo_p2 = mapinfos, j = 0; j < num; j++, mapinfo_p2++)
550 if (mapinfo_p2->vaddr != mapinfo_p->vaddr
551 && mapinfo_p2->ino == mapinfo_p->ino
552 && mapinfo_p2->dev == mapinfo_p->dev)
554 map.info.vaddr = mapinfo_p2->vaddr;
556 devctl (ctl_fd, DCMD_PROC_MAPDEBUG, &map, sizeof (map), 0);
560 if (strcmp (map.info.path, printme.name))
563 /* Lower debug_vaddr is always text, if nessessary, swap. */
564 if ((int) map.info.vaddr < (int) printme.text.debug_vaddr)
566 memcpy (&(printme.data), &(printme.text),
567 sizeof (printme.data));
568 printme.text.addr = mapinfo_p2->vaddr;
569 printme.text.size = mapinfo_p2->size;
570 printme.text.flags = mapinfo_p2->flags;
571 printme.text.offset = mapinfo_p2->offset;
572 printme.text.debug_vaddr = map.info.vaddr;
576 printme.data.addr = mapinfo_p2->vaddr;
577 printme.data.size = mapinfo_p2->size;
578 printme.data.flags = mapinfo_p2->flags;
579 printme.data.offset = mapinfo_p2->offset;
580 printme.data.debug_vaddr = map.info.vaddr;
587 printf_filtered ("%s\n", printme.name);
588 printf_filtered ("\ttext=%08x bytes @ 0x%08x\n", printme.text.size,
590 printf_filtered ("\t\tflags=%08x\n", printme.text.flags);
591 printf_filtered ("\t\tdebug=%08x\n", printme.text.debug_vaddr);
592 printf_filtered ("\t\toffset=%s\n", phex (printme.text.offset, 8));
593 if (printme.data.size)
595 printf_filtered ("\tdata=%08x bytes @ 0x%08x\n", printme.data.size,
597 printf_filtered ("\t\tflags=%08x\n", printme.data.flags);
598 printf_filtered ("\t\tdebug=%08x\n", printme.data.debug_vaddr);
599 printf_filtered ("\t\toffset=%s\n", phex (printme.data.offset, 8));
601 printf_filtered ("\tdev=0x%x\n", printme.dev);
602 printf_filtered ("\tino=0x%x\n", (unsigned int) printme.ino);
608 /* Print status information about what we're accessing. */
610 procfs_files_info (struct target_ops *ignore)
612 struct inferior *inf = current_inferior ();
614 printf_unfiltered ("\tUsing the running image of %s %s via %s.\n",
615 inf->attach_flag ? "attached" : "child",
616 target_pid_to_str (inferior_ptid),
617 (nodestr != NULL) ? nodestr : "local node");
620 /* Target to_pid_to_exec_file implementation. */
623 procfs_pid_to_exec_file (struct target_ops *ops, const int pid)
626 static char proc_path[PATH_MAX];
629 /* Read exe file name. */
630 snprintf (proc_path, sizeof (proc_path), "%s/proc/%d/exefile",
631 (nodestr != NULL) ? nodestr : "", pid);
632 proc_fd = open (proc_path, O_RDONLY);
636 rd = read (proc_fd, proc_path, sizeof (proc_path) - 1);
643 proc_path[rd] = '\0';
647 /* Attach to process PID, then initialize for debugging it. */
649 procfs_attach (struct target_ops *ops, const char *args, int from_tty)
653 struct inferior *inf;
655 pid = parse_pid_to_attach (args);
657 if (pid == getpid ())
658 error (_("Attaching GDB to itself is not a good idea..."));
662 exec_file = (char *) get_exec_file (0);
665 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file,
666 target_pid_to_str (pid_to_ptid (pid)));
668 printf_unfiltered ("Attaching to %s\n",
669 target_pid_to_str (pid_to_ptid (pid)));
671 gdb_flush (gdb_stdout);
673 inferior_ptid = do_attach (pid_to_ptid (pid));
674 inf = current_inferior ();
675 inferior_appeared (inf, pid);
676 inf->attach_flag = 1;
678 if (!target_is_pushed (ops))
681 procfs_update_thread_list (ops);
685 procfs_post_attach (struct target_ops *self, pid_t pid)
688 solib_create_inferior_hook (0);
692 do_attach (ptid_t ptid)
694 procfs_status status;
695 struct sigevent event;
698 snprintf (path, PATH_MAX - 1, "%s%s/%d/as",
699 (nodestr != NULL) ? nodestr : "", "/proc", ptid_get_pid (ptid));
700 ctl_fd = open (path, O_RDWR);
702 error (_("Couldn't open proc file %s, error %d (%s)"), path, errno,
703 safe_strerror (errno));
704 if (devctl (ctl_fd, DCMD_PROC_STOP, &status, sizeof (status), 0) != EOK)
705 error (_("Couldn't stop process"));
707 /* Define a sigevent for process stopped notification. */
708 event.sigev_notify = SIGEV_SIGNAL_THREAD;
709 event.sigev_signo = SIGUSR1;
710 event.sigev_code = 0;
711 event.sigev_value.sival_ptr = NULL;
712 event.sigev_priority = -1;
713 devctl (ctl_fd, DCMD_PROC_EVENT, &event, sizeof (event), 0);
715 if (devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0) == EOK
716 && status.flags & _DEBUG_FLAG_STOPPED)
717 SignalKill (nto_node (), ptid_get_pid (ptid), 0, SIGCONT, 0, 0);
718 nto_init_solib_absolute_prefix ();
719 return ptid_build (ptid_get_pid (ptid), 0, status.tid);
722 /* Ask the user what to do when an interrupt is received. */
724 interrupt_query (void)
726 target_terminal_ours ();
728 if (query (_("Interrupted while waiting for the program.\n\
729 Give up (and stop debugging it)? ")))
731 target_mourn_inferior ();
735 target_terminal_inferior ();
738 /* The user typed ^C twice. */
740 nto_handle_sigint_twice (int signo)
742 signal (signo, ofunc);
744 signal (signo, nto_handle_sigint_twice);
748 nto_handle_sigint (int signo)
750 /* If this doesn't work, try more severe steps. */
751 signal (signo, nto_handle_sigint_twice);
753 target_interrupt (inferior_ptid);
757 procfs_wait (struct target_ops *ops,
758 ptid_t ptid, struct target_waitstatus *ourstatus, int options)
762 procfs_status status;
763 static int exit_signo = 0; /* To track signals that cause termination. */
765 ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
767 if (ptid_equal (inferior_ptid, null_ptid))
769 ourstatus->kind = TARGET_WAITKIND_STOPPED;
770 ourstatus->value.sig = GDB_SIGNAL_0;
776 sigaddset (&set, SIGUSR1);
778 devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0);
779 while (!(status.flags & _DEBUG_FLAG_ISTOP))
781 ofunc = signal (SIGINT, nto_handle_sigint);
782 sigwaitinfo (&set, &info);
783 signal (SIGINT, ofunc);
784 devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0);
787 if (status.flags & _DEBUG_FLAG_SSTEP)
789 ourstatus->kind = TARGET_WAITKIND_STOPPED;
790 ourstatus->value.sig = GDB_SIGNAL_TRAP;
792 /* Was it a breakpoint? */
793 else if (status.flags & _DEBUG_FLAG_TRACE)
795 ourstatus->kind = TARGET_WAITKIND_STOPPED;
796 ourstatus->value.sig = GDB_SIGNAL_TRAP;
798 else if (status.flags & _DEBUG_FLAG_ISTOP)
802 case _DEBUG_WHY_SIGNALLED:
803 ourstatus->kind = TARGET_WAITKIND_STOPPED;
804 ourstatus->value.sig =
805 gdb_signal_from_host (status.info.si_signo);
808 case _DEBUG_WHY_FAULTED:
809 ourstatus->kind = TARGET_WAITKIND_STOPPED;
810 if (status.info.si_signo == SIGTRAP)
812 ourstatus->value.sig = 0;
817 ourstatus->value.sig =
818 gdb_signal_from_host (status.info.si_signo);
819 exit_signo = ourstatus->value.sig;
823 case _DEBUG_WHY_TERMINATED:
827 waitpid (ptid_get_pid (inferior_ptid), &waitval, WNOHANG);
830 /* Abnormal death. */
831 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
832 ourstatus->value.sig = exit_signo;
837 ourstatus->kind = TARGET_WAITKIND_EXITED;
838 ourstatus->value.integer = WEXITSTATUS (waitval);
844 case _DEBUG_WHY_REQUESTED:
845 /* We are assuming a requested stop is due to a SIGINT. */
846 ourstatus->kind = TARGET_WAITKIND_STOPPED;
847 ourstatus->value.sig = GDB_SIGNAL_INT;
853 return ptid_build (status.pid, 0, status.tid);
856 /* Read the current values of the inferior's registers, both the
857 general register set and floating point registers (if supported)
858 and update gdb's idea of their current values. */
860 procfs_fetch_registers (struct target_ops *ops,
861 struct regcache *regcache, int regno)
867 procfs_altreg altreg;
872 procfs_set_thread (inferior_ptid);
873 if (devctl (ctl_fd, DCMD_PROC_GETGREG, ®, sizeof (reg), ®size) == EOK)
874 nto_supply_gregset (regcache, (char *) ®.greg);
875 if (devctl (ctl_fd, DCMD_PROC_GETFPREG, ®, sizeof (reg), ®size)
877 nto_supply_fpregset (regcache, (char *) ®.fpreg);
878 if (devctl (ctl_fd, DCMD_PROC_GETALTREG, ®, sizeof (reg), ®size)
880 nto_supply_altregset (regcache, (char *) ®.altreg);
883 /* Helper for procfs_xfer_partial that handles memory transfers.
884 Arguments are like target_xfer_partial. */
886 static enum target_xfer_status
887 procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
888 ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
892 if (lseek (ctl_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr)
893 return TARGET_XFER_E_IO;
895 if (writebuf != NULL)
896 nbytes = write (ctl_fd, writebuf, len);
898 nbytes = read (ctl_fd, readbuf, len);
900 return TARGET_XFER_E_IO;
901 *xfered_len = nbytes;
902 return TARGET_XFER_OK;
905 /* Target to_xfer_partial implementation. */
907 static enum target_xfer_status
908 procfs_xfer_partial (struct target_ops *ops, enum target_object object,
909 const char *annex, gdb_byte *readbuf,
910 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
911 ULONGEST *xfered_len)
915 case TARGET_OBJECT_MEMORY:
916 return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len);
917 case TARGET_OBJECT_AUXV:
921 CORE_ADDR initial_stack;
922 debug_process_t procinfo;
923 /* For 32-bit architecture, size of auxv_t is 8 bytes. */
924 const unsigned int sizeof_auxv_t = sizeof (auxv_t);
925 const unsigned int sizeof_tempbuf = 20 * sizeof_auxv_t;
927 gdb_byte *const tempbuf = alloca (sizeof_tempbuf);
930 return TARGET_XFER_E_IO;
932 err = devctl (ctl_fd, DCMD_PROC_INFO, &procinfo,
935 return TARGET_XFER_E_IO;
937 initial_stack = procinfo.initial_stack;
939 /* procfs is always 'self-hosted', no byte-order manipulation. */
940 tempread = nto_read_auxv_from_initial_stack (initial_stack, tempbuf,
943 tempread = min (tempread, len) - offset;
944 memcpy (readbuf, tempbuf + offset, tempread);
945 *xfered_len = tempread;
946 return tempread ? TARGET_XFER_OK : TARGET_XFER_EOF;
950 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
951 readbuf, writebuf, offset, len,
956 /* Take a program previously attached to and detaches it.
957 The program resumes execution and will no longer stop
958 on signals, etc. We'd better not have left any breakpoints
959 in the program or it'll die when it hits one. */
961 procfs_detach (struct target_ops *ops, const char *args, int from_tty)
968 char *exec_file = get_exec_file (0);
971 printf_unfiltered ("Detaching from program: %s %s\n",
972 exec_file, target_pid_to_str (inferior_ptid));
973 gdb_flush (gdb_stdout);
976 siggnal = atoi (args);
979 SignalKill (nto_node (), ptid_get_pid (inferior_ptid), 0, siggnal, 0, 0);
984 pid = ptid_get_pid (inferior_ptid);
985 inferior_ptid = null_ptid;
986 detach_inferior (pid);
988 inf_child_maybe_unpush_target (ops);
992 procfs_breakpoint (CORE_ADDR addr, int type, int size)
999 errno = devctl (ctl_fd, DCMD_PROC_BREAK, &brk, sizeof (brk), 0);
1006 procfs_insert_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
1007 struct bp_target_info *bp_tgt)
1009 bp_tgt->placed_address = bp_tgt->reqstd_address;
1010 return procfs_breakpoint (bp_tgt->placed_address, _DEBUG_BREAK_EXEC, 0);
1014 procfs_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
1015 struct bp_target_info *bp_tgt)
1017 return procfs_breakpoint (bp_tgt->placed_address, _DEBUG_BREAK_EXEC, -1);
1021 procfs_insert_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
1022 struct bp_target_info *bp_tgt)
1024 bp_tgt->placed_address = bp_tgt->reqstd_address;
1025 return procfs_breakpoint (bp_tgt->placed_address,
1026 _DEBUG_BREAK_EXEC | _DEBUG_BREAK_HW, 0);
1030 procfs_remove_hw_breakpoint (struct target_ops *self,
1031 struct gdbarch *gdbarch,
1032 struct bp_target_info *bp_tgt)
1034 return procfs_breakpoint (bp_tgt->placed_address,
1035 _DEBUG_BREAK_EXEC | _DEBUG_BREAK_HW, -1);
1039 procfs_resume (struct target_ops *ops,
1040 ptid_t ptid, int step, enum gdb_signal signo)
1043 procfs_status status;
1044 sigset_t *run_fault = (sigset_t *) (void *) &run.fault;
1046 if (ptid_equal (inferior_ptid, null_ptid))
1049 procfs_set_thread (ptid_equal (ptid, minus_one_ptid) ? inferior_ptid :
1052 run.flags = _DEBUG_RUN_FAULT | _DEBUG_RUN_TRACE;
1054 run.flags |= _DEBUG_RUN_STEP;
1056 sigemptyset (run_fault);
1057 sigaddset (run_fault, FLTBPT);
1058 sigaddset (run_fault, FLTTRACE);
1059 sigaddset (run_fault, FLTILL);
1060 sigaddset (run_fault, FLTPRIV);
1061 sigaddset (run_fault, FLTBOUNDS);
1062 sigaddset (run_fault, FLTIOVF);
1063 sigaddset (run_fault, FLTIZDIV);
1064 sigaddset (run_fault, FLTFPE);
1065 /* Peter V will be changing this at some point. */
1066 sigaddset (run_fault, FLTPAGE);
1068 run.flags |= _DEBUG_RUN_ARM;
1070 signal_to_pass = gdb_signal_to_host (signo);
1074 devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0);
1075 signal_to_pass = gdb_signal_to_host (signo);
1076 if (status.why & (_DEBUG_WHY_SIGNALLED | _DEBUG_WHY_FAULTED))
1078 if (signal_to_pass != status.info.si_signo)
1080 SignalKill (nto_node (), ptid_get_pid (inferior_ptid), 0,
1081 signal_to_pass, 0, 0);
1082 run.flags |= _DEBUG_RUN_CLRFLT | _DEBUG_RUN_CLRSIG;
1084 else /* Let it kill the program without telling us. */
1085 sigdelset (&run.trace, signal_to_pass);
1089 run.flags |= _DEBUG_RUN_CLRSIG | _DEBUG_RUN_CLRFLT;
1091 errno = devctl (ctl_fd, DCMD_PROC_RUN, &run, sizeof (run), 0);
1094 perror (_("run error!\n"));
1100 procfs_mourn_inferior (struct target_ops *ops)
1102 if (!ptid_equal (inferior_ptid, null_ptid))
1104 SignalKill (nto_node (), ptid_get_pid (inferior_ptid), 0, SIGKILL, 0, 0);
1107 inferior_ptid = null_ptid;
1108 init_thread_list ();
1109 inf_child_mourn_inferior (ops);
1112 /* This function breaks up an argument string into an argument
1113 vector suitable for passing to execvp().
1114 E.g., on "run a b c d" this routine would get as input
1115 the string "a b c d", and as output it would fill in argv with
1116 the four arguments "a", "b", "c", "d". The only additional
1117 functionality is simple quoting. The gdb command:
1119 will fill in argv with the three args "a", "b c d", "e". */
1121 breakup_args (char *scratch, char **argv)
1123 char *pp, *cp = scratch;
1128 /* Scan past leading separators. */
1130 while (*cp == ' ' || *cp == '\t' || *cp == '\n')
1133 /* Break if at end of string. */
1141 quoting = strchr (cp, '"') ? 1 : 0;
1146 /* Scan for next arg separator. */
1149 cp = strchr (pp, '"');
1150 if ((cp == NULL) || (!quoting))
1151 cp = strchr (pp, ' ');
1153 cp = strchr (pp, '\t');
1155 cp = strchr (pp, '\n');
1157 /* No separators => end of string => break. */
1164 /* Replace the separator with a terminator. */
1168 /* Execv requires a null-terminated arg vector. */
1173 procfs_create_inferior (struct target_ops *ops, char *exec_file,
1174 char *allargs, char **env, int from_tty)
1176 struct inheritance inherit;
1180 const char *in = "", *out = "", *err = "";
1183 const char *inferior_io_terminal = get_inferior_io_terminal ();
1184 struct inferior *inf;
1186 argv = xmalloc (((strlen (allargs) + 1) / (unsigned) 2 + 2) *
1188 argv[0] = get_exec_file (1);
1192 argv[0] = exec_file;
1197 args = xstrdup (allargs);
1198 breakup_args (args, (exec_file != NULL) ? &argv[1] : &argv[0]);
1200 argv = nto_parse_redirection (argv, &in, &out, &err);
1202 fds[0] = STDIN_FILENO;
1203 fds[1] = STDOUT_FILENO;
1204 fds[2] = STDERR_FILENO;
1206 /* If the user specified I/O via gdb's --tty= arg, use it, but only
1207 if the i/o is not also being specified via redirection. */
1208 if (inferior_io_terminal)
1211 in = inferior_io_terminal;
1213 out = inferior_io_terminal;
1215 err = inferior_io_terminal;
1220 fd = open (in, O_RDONLY);
1228 fd = open (out, O_WRONLY);
1236 fd = open (err, O_WRONLY);
1243 /* Clear any pending SIGUSR1's but keep the behavior the same. */
1244 signal (SIGUSR1, signal (SIGUSR1, SIG_IGN));
1247 sigaddset (&set, SIGUSR1);
1248 sigprocmask (SIG_UNBLOCK, &set, NULL);
1250 memset (&inherit, 0, sizeof (inherit));
1252 if (ND_NODE_CMP (nto_procfs_node, ND_LOCAL_NODE) != 0)
1254 inherit.nd = nto_node ();
1255 inherit.flags |= SPAWN_SETND;
1256 inherit.flags &= ~SPAWN_EXEC;
1258 inherit.flags |= SPAWN_SETGROUP | SPAWN_HOLD;
1259 inherit.pgroup = SPAWN_NEWPGROUP;
1260 pid = spawnp (argv[0], 3, fds, &inherit, argv,
1261 ND_NODE_CMP (nto_procfs_node, ND_LOCAL_NODE) == 0 ? env : 0);
1264 sigprocmask (SIG_BLOCK, &set, NULL);
1267 error (_("Error spawning %s: %d (%s)"), argv[0], errno,
1268 safe_strerror (errno));
1270 if (fds[0] != STDIN_FILENO)
1272 if (fds[1] != STDOUT_FILENO)
1274 if (fds[2] != STDERR_FILENO)
1277 inferior_ptid = do_attach (pid_to_ptid (pid));
1278 procfs_update_thread_list (ops);
1280 inf = current_inferior ();
1281 inferior_appeared (inf, pid);
1282 inf->attach_flag = 0;
1284 flags = _DEBUG_FLAG_KLC; /* Kill-on-Last-Close flag. */
1285 errn = devctl (ctl_fd, DCMD_PROC_SET_FLAG, &flags, sizeof (flags), 0);
1288 /* FIXME: expected warning? */
1289 /* warning( "Failed to set Kill-on-Last-Close flag: errno = %d(%s)\n",
1290 errn, strerror(errn) ); */
1292 if (!target_is_pushed (ops))
1294 target_terminal_init ();
1296 if (exec_bfd != NULL
1297 || (symfile_objfile != NULL && symfile_objfile->obfd != NULL))
1298 solib_create_inferior_hook (0);
1302 procfs_interrupt (struct target_ops *self, ptid_t ptid)
1304 devctl (ctl_fd, DCMD_PROC_STOP, NULL, 0, 0);
1308 procfs_kill_inferior (struct target_ops *ops)
1310 target_mourn_inferior ();
1313 /* Fill buf with regset and return devctl cmd to do the setting. Return
1314 -1 if we fail to get the regset. Store size of regset in regsize. */
1316 get_regset (int regset, char *buf, int bufsize, int *regsize)
1318 int dev_get, dev_set;
1321 case NTO_REG_GENERAL:
1322 dev_get = DCMD_PROC_GETGREG;
1323 dev_set = DCMD_PROC_SETGREG;
1327 dev_get = DCMD_PROC_GETFPREG;
1328 dev_set = DCMD_PROC_SETFPREG;
1332 dev_get = DCMD_PROC_GETALTREG;
1333 dev_set = DCMD_PROC_SETALTREG;
1336 case NTO_REG_SYSTEM:
1340 if (devctl (ctl_fd, dev_get, buf, bufsize, regsize) != EOK)
1347 procfs_store_registers (struct target_ops *ops,
1348 struct regcache *regcache, int regno)
1354 procfs_altreg altreg;
1358 int len, regset, regsize, dev_set, err;
1361 if (ptid_equal (inferior_ptid, null_ptid))
1363 procfs_set_thread (inferior_ptid);
1367 for (regset = NTO_REG_GENERAL; regset < NTO_REG_END; regset++)
1369 dev_set = get_regset (regset, (char *) ®,
1370 sizeof (reg), ®size);
1374 if (nto_regset_fill (regcache, regset, (char *) ®) == -1)
1377 err = devctl (ctl_fd, dev_set, ®, regsize, 0);
1379 fprintf_unfiltered (gdb_stderr,
1380 "Warning unable to write regset %d: %s\n",
1381 regno, safe_strerror (err));
1386 regset = nto_regset_id (regno);
1390 dev_set = get_regset (regset, (char *) ®, sizeof (reg), ®size);
1394 len = nto_register_area (get_regcache_arch (regcache),
1395 regno, regset, &off);
1400 regcache_raw_collect (regcache, regno, (char *) ® + off);
1402 err = devctl (ctl_fd, dev_set, ®, regsize, 0);
1404 fprintf_unfiltered (gdb_stderr,
1405 "Warning unable to write regset %d: %s\n", regno,
1406 safe_strerror (err));
1410 /* Set list of signals to be handled in the target. */
1413 procfs_pass_signals (struct target_ops *self,
1414 int numsigs, unsigned char *pass_signals)
1418 sigfillset (&run.trace);
1420 for (signo = 1; signo < NSIG; signo++)
1422 int target_signo = gdb_signal_from_host (signo);
1423 if (target_signo < numsigs && pass_signals[target_signo])
1424 sigdelset (&run.trace, signo);
1429 procfs_pid_to_str (struct target_ops *ops, ptid_t ptid)
1431 static char buf[1024];
1433 struct tidinfo *tip;
1435 pid = ptid_get_pid (ptid);
1436 tid = ptid_get_tid (ptid);
1438 n = snprintf (buf, 1023, "process %d", pid);
1441 tip = procfs_thread_info (pid, tid);
1443 snprintf (&buf[n], 1023, " (state = 0x%02x)", tip->state);
1449 /* to_can_run implementation for "target procfs". Note this really
1450 means "can this target be the default run target", which there can
1451 be only one, and we make it be "target native" like other ports.
1452 "target procfs <node>" wouldn't make sense as default run target, as
1456 procfs_can_run (struct target_ops *self)
1461 /* "target procfs". */
1462 static struct target_ops nto_procfs_ops;
1464 /* "target native". */
1465 static struct target_ops *nto_native_ops;
1467 /* to_open implementation for "target procfs". */
1470 procfs_open (const char *arg, int from_tty)
1472 procfs_open_1 (&nto_procfs_ops, arg, from_tty);
1475 /* to_open implementation for "target native". */
1478 procfs_native_open (const char *arg, int from_tty)
1480 procfs_open_1 (nto_native_ops, arg, from_tty);
1483 /* Create the "native" and "procfs" targets. */
1486 init_procfs_targets (void)
1488 struct target_ops *t = inf_child_target ();
1490 /* Leave to_shortname as "native". */
1491 t->to_longname = "QNX Neutrino local process";
1492 t->to_doc = "QNX Neutrino local process (started by the \"run\" command).";
1493 t->to_open = procfs_native_open;
1494 t->to_attach = procfs_attach;
1495 t->to_post_attach = procfs_post_attach;
1496 t->to_detach = procfs_detach;
1497 t->to_resume = procfs_resume;
1498 t->to_wait = procfs_wait;
1499 t->to_fetch_registers = procfs_fetch_registers;
1500 t->to_store_registers = procfs_store_registers;
1501 t->to_xfer_partial = procfs_xfer_partial;
1502 t->to_files_info = procfs_files_info;
1503 t->to_insert_breakpoint = procfs_insert_breakpoint;
1504 t->to_remove_breakpoint = procfs_remove_breakpoint;
1505 t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint;
1506 t->to_insert_hw_breakpoint = procfs_insert_hw_breakpoint;
1507 t->to_remove_hw_breakpoint = procfs_remove_hw_breakpoint;
1508 t->to_insert_watchpoint = procfs_insert_hw_watchpoint;
1509 t->to_remove_watchpoint = procfs_remove_hw_watchpoint;
1510 t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint;
1511 t->to_kill = procfs_kill_inferior;
1512 t->to_create_inferior = procfs_create_inferior;
1513 t->to_mourn_inferior = procfs_mourn_inferior;
1514 t->to_pass_signals = procfs_pass_signals;
1515 t->to_thread_alive = procfs_thread_alive;
1516 t->to_update_thread_list = procfs_update_thread_list;
1517 t->to_pid_to_str = procfs_pid_to_str;
1518 t->to_interrupt = procfs_interrupt;
1519 t->to_have_continuable_watchpoint = 1;
1520 t->to_extra_thread_info = nto_extra_thread_info;
1521 t->to_pid_to_exec_file = procfs_pid_to_exec_file;
1525 /* Register "target native". This is the default run target. */
1528 /* Register "target procfs <node>". */
1529 nto_procfs_ops = *t;
1530 nto_procfs_ops.to_shortname = "procfs";
1531 nto_procfs_ops.to_can_run = procfs_can_run;
1532 t->to_longname = "QNX Neutrino local or remote process";
1533 t->to_doc = "QNX Neutrino process. target procfs <node>";
1534 t->to_open = procfs_open;
1536 add_target (&nto_procfs_ops);
1539 #define OSTYPE_NTO 1
1541 extern initialize_file_ftype _initialize_procfs;
1544 _initialize_procfs (void)
1548 init_procfs_targets ();
1550 /* We use SIGUSR1 to gain control after we block waiting for a process.
1551 We use sigwaitevent to wait. */
1553 sigaddset (&set, SIGUSR1);
1554 sigprocmask (SIG_BLOCK, &set, NULL);
1556 /* Initially, make sure all signals are reported. */
1557 sigfillset (&run.trace);
1559 /* Stuff some information. */
1560 nto_cpuinfo_flags = SYSPAGE_ENTRY (cpuinfo)->flags;
1561 nto_cpuinfo_valid = 1;
1563 add_info ("pidlist", procfs_pidlist, _("pidlist"));
1564 add_info ("meminfo", procfs_meminfo, _("memory information"));
1566 nto_is_nto_target = procfs_is_nto_target;
1571 procfs_hw_watchpoint (int addr, int len, enum target_hw_bp_type type)
1578 brk.type = _DEBUG_BREAK_RD;
1581 brk.type = _DEBUG_BREAK_RW;
1583 default: /* Modify. */
1584 /* FIXME: brk.type = _DEBUG_BREAK_RWM gives EINVAL for some reason. */
1585 brk.type = _DEBUG_BREAK_RW;
1587 brk.type |= _DEBUG_BREAK_HW; /* Always ask for HW. */
1591 errno = devctl (ctl_fd, DCMD_PROC_BREAK, &brk, sizeof (brk), 0);
1594 perror (_("Failed to set hardware watchpoint"));
1601 procfs_can_use_hw_breakpoint (struct target_ops *self,
1603 int cnt, int othertype)
1609 procfs_remove_hw_watchpoint (struct target_ops *self,
1610 CORE_ADDR addr, int len,
1611 enum target_hw_bp_type type,
1612 struct expression *cond)
1614 return procfs_hw_watchpoint (addr, -1, type);
1618 procfs_insert_hw_watchpoint (struct target_ops *self,
1619 CORE_ADDR addr, int len,
1620 enum target_hw_bp_type type,
1621 struct expression *cond)
1623 return procfs_hw_watchpoint (addr, len, type);
1627 procfs_stopped_by_watchpoint (struct target_ops *ops)