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 /* Attach to process PID, then initialize for debugging it. */
622 procfs_attach (struct target_ops
*ops
, const char *args
, int from_tty
)
626 struct inferior
*inf
;
628 pid
= parse_pid_to_attach (args
);
630 if (pid
== getpid ())
631 error (_("Attaching GDB to itself is not a good idea..."));
635 exec_file
= (char *) get_exec_file (0);
638 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
,
639 target_pid_to_str (pid_to_ptid (pid
)));
641 printf_unfiltered ("Attaching to %s\n",
642 target_pid_to_str (pid_to_ptid (pid
)));
644 gdb_flush (gdb_stdout
);
646 inferior_ptid
= do_attach (pid_to_ptid (pid
));
647 inf
= current_inferior ();
648 inferior_appeared (inf
, pid
);
649 inf
->attach_flag
= 1;
651 if (!target_is_pushed (ops
))
654 procfs_update_thread_list (ops
);
658 procfs_post_attach (struct target_ops
*self
, pid_t pid
)
661 solib_create_inferior_hook (0);
665 do_attach (ptid_t ptid
)
667 procfs_status status
;
668 struct sigevent event
;
671 snprintf (path
, PATH_MAX
- 1, "%s%s/%d/as",
672 (nodestr
!= NULL
) ? nodestr
: "", "/proc", ptid_get_pid (ptid
));
673 ctl_fd
= open (path
, O_RDWR
);
675 error (_("Couldn't open proc file %s, error %d (%s)"), path
, errno
,
676 safe_strerror (errno
));
677 if (devctl (ctl_fd
, DCMD_PROC_STOP
, &status
, sizeof (status
), 0) != EOK
)
678 error (_("Couldn't stop process"));
680 /* Define a sigevent for process stopped notification. */
681 event
.sigev_notify
= SIGEV_SIGNAL_THREAD
;
682 event
.sigev_signo
= SIGUSR1
;
683 event
.sigev_code
= 0;
684 event
.sigev_value
.sival_ptr
= NULL
;
685 event
.sigev_priority
= -1;
686 devctl (ctl_fd
, DCMD_PROC_EVENT
, &event
, sizeof (event
), 0);
688 if (devctl (ctl_fd
, DCMD_PROC_STATUS
, &status
, sizeof (status
), 0) == EOK
689 && status
.flags
& _DEBUG_FLAG_STOPPED
)
690 SignalKill (nto_node (), ptid_get_pid (ptid
), 0, SIGCONT
, 0, 0);
691 nto_init_solib_absolute_prefix ();
692 return ptid_build (ptid_get_pid (ptid
), 0, status
.tid
);
695 /* Ask the user what to do when an interrupt is received. */
697 interrupt_query (void)
699 target_terminal_ours ();
701 if (query (_("Interrupted while waiting for the program.\n\
702 Give up (and stop debugging it)? ")))
704 target_mourn_inferior ();
708 target_terminal_inferior ();
711 /* The user typed ^C twice. */
713 nto_handle_sigint_twice (int signo
)
715 signal (signo
, ofunc
);
717 signal (signo
, nto_handle_sigint_twice
);
721 nto_handle_sigint (int signo
)
723 /* If this doesn't work, try more severe steps. */
724 signal (signo
, nto_handle_sigint_twice
);
726 target_interrupt (inferior_ptid
);
730 procfs_wait (struct target_ops
*ops
,
731 ptid_t ptid
, struct target_waitstatus
*ourstatus
, int options
)
735 procfs_status status
;
736 static int exit_signo
= 0; /* To track signals that cause termination. */
738 ourstatus
->kind
= TARGET_WAITKIND_SPURIOUS
;
740 if (ptid_equal (inferior_ptid
, null_ptid
))
742 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
743 ourstatus
->value
.sig
= GDB_SIGNAL_0
;
749 sigaddset (&set
, SIGUSR1
);
751 devctl (ctl_fd
, DCMD_PROC_STATUS
, &status
, sizeof (status
), 0);
752 while (!(status
.flags
& _DEBUG_FLAG_ISTOP
))
754 ofunc
= signal (SIGINT
, nto_handle_sigint
);
755 sigwaitinfo (&set
, &info
);
756 signal (SIGINT
, ofunc
);
757 devctl (ctl_fd
, DCMD_PROC_STATUS
, &status
, sizeof (status
), 0);
760 if (status
.flags
& _DEBUG_FLAG_SSTEP
)
762 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
763 ourstatus
->value
.sig
= GDB_SIGNAL_TRAP
;
765 /* Was it a breakpoint? */
766 else if (status
.flags
& _DEBUG_FLAG_TRACE
)
768 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
769 ourstatus
->value
.sig
= GDB_SIGNAL_TRAP
;
771 else if (status
.flags
& _DEBUG_FLAG_ISTOP
)
775 case _DEBUG_WHY_SIGNALLED
:
776 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
777 ourstatus
->value
.sig
=
778 gdb_signal_from_host (status
.info
.si_signo
);
781 case _DEBUG_WHY_FAULTED
:
782 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
783 if (status
.info
.si_signo
== SIGTRAP
)
785 ourstatus
->value
.sig
= 0;
790 ourstatus
->value
.sig
=
791 gdb_signal_from_host (status
.info
.si_signo
);
792 exit_signo
= ourstatus
->value
.sig
;
796 case _DEBUG_WHY_TERMINATED
:
800 waitpid (ptid_get_pid (inferior_ptid
), &waitval
, WNOHANG
);
803 /* Abnormal death. */
804 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
805 ourstatus
->value
.sig
= exit_signo
;
810 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
811 ourstatus
->value
.integer
= WEXITSTATUS (waitval
);
817 case _DEBUG_WHY_REQUESTED
:
818 /* We are assuming a requested stop is due to a SIGINT. */
819 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
820 ourstatus
->value
.sig
= GDB_SIGNAL_INT
;
826 return ptid_build (status
.pid
, 0, status
.tid
);
829 /* Read the current values of the inferior's registers, both the
830 general register set and floating point registers (if supported)
831 and update gdb's idea of their current values. */
833 procfs_fetch_registers (struct target_ops
*ops
,
834 struct regcache
*regcache
, int regno
)
840 procfs_altreg altreg
;
845 procfs_set_thread (inferior_ptid
);
846 if (devctl (ctl_fd
, DCMD_PROC_GETGREG
, ®
, sizeof (reg
), ®size
) == EOK
)
847 nto_supply_gregset (regcache
, (char *) ®
.greg
);
848 if (devctl (ctl_fd
, DCMD_PROC_GETFPREG
, ®
, sizeof (reg
), ®size
)
850 nto_supply_fpregset (regcache
, (char *) ®
.fpreg
);
851 if (devctl (ctl_fd
, DCMD_PROC_GETALTREG
, ®
, sizeof (reg
), ®size
)
853 nto_supply_altregset (regcache
, (char *) ®
.altreg
);
856 /* Helper for procfs_xfer_partial that handles memory transfers.
857 Arguments are like target_xfer_partial. */
859 static enum target_xfer_status
860 procfs_xfer_memory (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
861 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
865 if (lseek (ctl_fd
, (off_t
) memaddr
, SEEK_SET
) != (off_t
) memaddr
)
866 return TARGET_XFER_E_IO
;
868 if (writebuf
!= NULL
)
869 nbytes
= write (ctl_fd
, writebuf
, len
);
871 nbytes
= read (ctl_fd
, readbuf
, len
);
873 return TARGET_XFER_E_IO
;
874 *xfered_len
= nbytes
;
875 return TARGET_XFER_OK
;
878 /* Target to_xfer_partial implementation. */
880 static enum target_xfer_status
881 procfs_xfer_partial (struct target_ops
*ops
, enum target_object object
,
882 const char *annex
, gdb_byte
*readbuf
,
883 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
884 ULONGEST
*xfered_len
)
888 case TARGET_OBJECT_MEMORY
:
889 return procfs_xfer_memory (readbuf
, writebuf
, offset
, len
, xfered_len
);
890 case TARGET_OBJECT_AUXV
:
894 CORE_ADDR initial_stack
;
895 debug_process_t procinfo
;
896 /* For 32-bit architecture, size of auxv_t is 8 bytes. */
897 const unsigned int sizeof_auxv_t
= sizeof (auxv_t
);
898 const unsigned int sizeof_tempbuf
= 20 * sizeof_auxv_t
;
900 gdb_byte
*const tempbuf
= alloca (sizeof_tempbuf
);
903 return TARGET_XFER_E_IO
;
905 err
= devctl (ctl_fd
, DCMD_PROC_INFO
, &procinfo
,
908 return TARGET_XFER_E_IO
;
910 initial_stack
= procinfo
.initial_stack
;
912 /* procfs is always 'self-hosted', no byte-order manipulation. */
913 tempread
= nto_read_auxv_from_initial_stack (initial_stack
, tempbuf
,
916 tempread
= min (tempread
, len
) - offset
;
917 memcpy (readbuf
, tempbuf
+ offset
, tempread
);
918 *xfered_len
= tempread
;
919 return tempread
? TARGET_XFER_OK
: TARGET_XFER_EOF
;
923 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
924 readbuf
, writebuf
, offset
, len
,
929 /* Take a program previously attached to and detaches it.
930 The program resumes execution and will no longer stop
931 on signals, etc. We'd better not have left any breakpoints
932 in the program or it'll die when it hits one. */
934 procfs_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
941 char *exec_file
= get_exec_file (0);
944 printf_unfiltered ("Detaching from program: %s %s\n",
945 exec_file
, target_pid_to_str (inferior_ptid
));
946 gdb_flush (gdb_stdout
);
949 siggnal
= atoi (args
);
952 SignalKill (nto_node (), ptid_get_pid (inferior_ptid
), 0, siggnal
, 0, 0);
957 pid
= ptid_get_pid (inferior_ptid
);
958 inferior_ptid
= null_ptid
;
959 detach_inferior (pid
);
961 inf_child_maybe_unpush_target (ops
);
965 procfs_breakpoint (CORE_ADDR addr
, int type
, int size
)
972 errno
= devctl (ctl_fd
, DCMD_PROC_BREAK
, &brk
, sizeof (brk
), 0);
979 procfs_insert_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
980 struct bp_target_info
*bp_tgt
)
982 bp_tgt
->placed_address
= bp_tgt
->reqstd_address
;
983 return procfs_breakpoint (bp_tgt
->placed_address
, _DEBUG_BREAK_EXEC
, 0);
987 procfs_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
988 struct bp_target_info
*bp_tgt
)
990 return procfs_breakpoint (bp_tgt
->placed_address
, _DEBUG_BREAK_EXEC
, -1);
994 procfs_insert_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
995 struct bp_target_info
*bp_tgt
)
997 bp_tgt
->placed_address
= bp_tgt
->reqstd_address
;
998 return procfs_breakpoint (bp_tgt
->placed_address
,
999 _DEBUG_BREAK_EXEC
| _DEBUG_BREAK_HW
, 0);
1003 procfs_remove_hw_breakpoint (struct target_ops
*self
,
1004 struct gdbarch
*gdbarch
,
1005 struct bp_target_info
*bp_tgt
)
1007 return procfs_breakpoint (bp_tgt
->placed_address
,
1008 _DEBUG_BREAK_EXEC
| _DEBUG_BREAK_HW
, -1);
1012 procfs_resume (struct target_ops
*ops
,
1013 ptid_t ptid
, int step
, enum gdb_signal signo
)
1016 procfs_status status
;
1017 sigset_t
*run_fault
= (sigset_t
*) (void *) &run
.fault
;
1019 if (ptid_equal (inferior_ptid
, null_ptid
))
1022 procfs_set_thread (ptid_equal (ptid
, minus_one_ptid
) ? inferior_ptid
:
1025 run
.flags
= _DEBUG_RUN_FAULT
| _DEBUG_RUN_TRACE
;
1027 run
.flags
|= _DEBUG_RUN_STEP
;
1029 sigemptyset (run_fault
);
1030 sigaddset (run_fault
, FLTBPT
);
1031 sigaddset (run_fault
, FLTTRACE
);
1032 sigaddset (run_fault
, FLTILL
);
1033 sigaddset (run_fault
, FLTPRIV
);
1034 sigaddset (run_fault
, FLTBOUNDS
);
1035 sigaddset (run_fault
, FLTIOVF
);
1036 sigaddset (run_fault
, FLTIZDIV
);
1037 sigaddset (run_fault
, FLTFPE
);
1038 /* Peter V will be changing this at some point. */
1039 sigaddset (run_fault
, FLTPAGE
);
1041 run
.flags
|= _DEBUG_RUN_ARM
;
1043 signal_to_pass
= gdb_signal_to_host (signo
);
1047 devctl (ctl_fd
, DCMD_PROC_STATUS
, &status
, sizeof (status
), 0);
1048 signal_to_pass
= gdb_signal_to_host (signo
);
1049 if (status
.why
& (_DEBUG_WHY_SIGNALLED
| _DEBUG_WHY_FAULTED
))
1051 if (signal_to_pass
!= status
.info
.si_signo
)
1053 SignalKill (nto_node (), ptid_get_pid (inferior_ptid
), 0,
1054 signal_to_pass
, 0, 0);
1055 run
.flags
|= _DEBUG_RUN_CLRFLT
| _DEBUG_RUN_CLRSIG
;
1057 else /* Let it kill the program without telling us. */
1058 sigdelset (&run
.trace
, signal_to_pass
);
1062 run
.flags
|= _DEBUG_RUN_CLRSIG
| _DEBUG_RUN_CLRFLT
;
1064 errno
= devctl (ctl_fd
, DCMD_PROC_RUN
, &run
, sizeof (run
), 0);
1067 perror (_("run error!\n"));
1073 procfs_mourn_inferior (struct target_ops
*ops
)
1075 if (!ptid_equal (inferior_ptid
, null_ptid
))
1077 SignalKill (nto_node (), ptid_get_pid (inferior_ptid
), 0, SIGKILL
, 0, 0);
1080 inferior_ptid
= null_ptid
;
1081 init_thread_list ();
1082 inf_child_mourn_inferior (ops
);
1085 /* This function breaks up an argument string into an argument
1086 vector suitable for passing to execvp().
1087 E.g., on "run a b c d" this routine would get as input
1088 the string "a b c d", and as output it would fill in argv with
1089 the four arguments "a", "b", "c", "d". The only additional
1090 functionality is simple quoting. The gdb command:
1092 will fill in argv with the three args "a", "b c d", "e". */
1094 breakup_args (char *scratch
, char **argv
)
1096 char *pp
, *cp
= scratch
;
1101 /* Scan past leading separators. */
1103 while (*cp
== ' ' || *cp
== '\t' || *cp
== '\n')
1106 /* Break if at end of string. */
1114 quoting
= strchr (cp
, '"') ? 1 : 0;
1119 /* Scan for next arg separator. */
1122 cp
= strchr (pp
, '"');
1123 if ((cp
== NULL
) || (!quoting
))
1124 cp
= strchr (pp
, ' ');
1126 cp
= strchr (pp
, '\t');
1128 cp
= strchr (pp
, '\n');
1130 /* No separators => end of string => break. */
1137 /* Replace the separator with a terminator. */
1141 /* Execv requires a null-terminated arg vector. */
1146 procfs_create_inferior (struct target_ops
*ops
, char *exec_file
,
1147 char *allargs
, char **env
, int from_tty
)
1149 struct inheritance inherit
;
1153 const char *in
= "", *out
= "", *err
= "";
1156 const char *inferior_io_terminal
= get_inferior_io_terminal ();
1157 struct inferior
*inf
;
1159 argv
= xmalloc (((strlen (allargs
) + 1) / (unsigned) 2 + 2) *
1161 argv
[0] = get_exec_file (1);
1165 argv
[0] = exec_file
;
1170 args
= xstrdup (allargs
);
1171 breakup_args (args
, (exec_file
!= NULL
) ? &argv
[1] : &argv
[0]);
1173 argv
= nto_parse_redirection (argv
, &in
, &out
, &err
);
1175 fds
[0] = STDIN_FILENO
;
1176 fds
[1] = STDOUT_FILENO
;
1177 fds
[2] = STDERR_FILENO
;
1179 /* If the user specified I/O via gdb's --tty= arg, use it, but only
1180 if the i/o is not also being specified via redirection. */
1181 if (inferior_io_terminal
)
1184 in
= inferior_io_terminal
;
1186 out
= inferior_io_terminal
;
1188 err
= inferior_io_terminal
;
1193 fd
= open (in
, O_RDONLY
);
1201 fd
= open (out
, O_WRONLY
);
1209 fd
= open (err
, O_WRONLY
);
1216 /* Clear any pending SIGUSR1's but keep the behavior the same. */
1217 signal (SIGUSR1
, signal (SIGUSR1
, SIG_IGN
));
1220 sigaddset (&set
, SIGUSR1
);
1221 sigprocmask (SIG_UNBLOCK
, &set
, NULL
);
1223 memset (&inherit
, 0, sizeof (inherit
));
1225 if (ND_NODE_CMP (nto_procfs_node
, ND_LOCAL_NODE
) != 0)
1227 inherit
.nd
= nto_node ();
1228 inherit
.flags
|= SPAWN_SETND
;
1229 inherit
.flags
&= ~SPAWN_EXEC
;
1231 inherit
.flags
|= SPAWN_SETGROUP
| SPAWN_HOLD
;
1232 inherit
.pgroup
= SPAWN_NEWPGROUP
;
1233 pid
= spawnp (argv
[0], 3, fds
, &inherit
, argv
,
1234 ND_NODE_CMP (nto_procfs_node
, ND_LOCAL_NODE
) == 0 ? env
: 0);
1237 sigprocmask (SIG_BLOCK
, &set
, NULL
);
1240 error (_("Error spawning %s: %d (%s)"), argv
[0], errno
,
1241 safe_strerror (errno
));
1243 if (fds
[0] != STDIN_FILENO
)
1245 if (fds
[1] != STDOUT_FILENO
)
1247 if (fds
[2] != STDERR_FILENO
)
1250 inferior_ptid
= do_attach (pid_to_ptid (pid
));
1251 procfs_update_thread_list (ops
);
1253 inf
= current_inferior ();
1254 inferior_appeared (inf
, pid
);
1255 inf
->attach_flag
= 0;
1257 flags
= _DEBUG_FLAG_KLC
; /* Kill-on-Last-Close flag. */
1258 errn
= devctl (ctl_fd
, DCMD_PROC_SET_FLAG
, &flags
, sizeof (flags
), 0);
1261 /* FIXME: expected warning? */
1262 /* warning( "Failed to set Kill-on-Last-Close flag: errno = %d(%s)\n",
1263 errn, strerror(errn) ); */
1265 if (!target_is_pushed (ops
))
1267 target_terminal_init ();
1269 if (exec_bfd
!= NULL
1270 || (symfile_objfile
!= NULL
&& symfile_objfile
->obfd
!= NULL
))
1271 solib_create_inferior_hook (0);
1275 procfs_interrupt (struct target_ops
*self
, ptid_t ptid
)
1277 devctl (ctl_fd
, DCMD_PROC_STOP
, NULL
, 0, 0);
1281 procfs_kill_inferior (struct target_ops
*ops
)
1283 target_mourn_inferior ();
1286 /* Fill buf with regset and return devctl cmd to do the setting. Return
1287 -1 if we fail to get the regset. Store size of regset in regsize. */
1289 get_regset (int regset
, char *buf
, int bufsize
, int *regsize
)
1291 int dev_get
, dev_set
;
1294 case NTO_REG_GENERAL
:
1295 dev_get
= DCMD_PROC_GETGREG
;
1296 dev_set
= DCMD_PROC_SETGREG
;
1300 dev_get
= DCMD_PROC_GETFPREG
;
1301 dev_set
= DCMD_PROC_SETFPREG
;
1305 dev_get
= DCMD_PROC_GETALTREG
;
1306 dev_set
= DCMD_PROC_SETALTREG
;
1309 case NTO_REG_SYSTEM
:
1313 if (devctl (ctl_fd
, dev_get
, buf
, bufsize
, regsize
) != EOK
)
1320 procfs_store_registers (struct target_ops
*ops
,
1321 struct regcache
*regcache
, int regno
)
1327 procfs_altreg altreg
;
1331 int len
, regset
, regsize
, dev_set
, err
;
1334 if (ptid_equal (inferior_ptid
, null_ptid
))
1336 procfs_set_thread (inferior_ptid
);
1340 for (regset
= NTO_REG_GENERAL
; regset
< NTO_REG_END
; regset
++)
1342 dev_set
= get_regset (regset
, (char *) ®
,
1343 sizeof (reg
), ®size
);
1347 if (nto_regset_fill (regcache
, regset
, (char *) ®
) == -1)
1350 err
= devctl (ctl_fd
, dev_set
, ®
, regsize
, 0);
1352 fprintf_unfiltered (gdb_stderr
,
1353 "Warning unable to write regset %d: %s\n",
1354 regno
, safe_strerror (err
));
1359 regset
= nto_regset_id (regno
);
1363 dev_set
= get_regset (regset
, (char *) ®
, sizeof (reg
), ®size
);
1367 len
= nto_register_area (get_regcache_arch (regcache
),
1368 regno
, regset
, &off
);
1373 regcache_raw_collect (regcache
, regno
, (char *) ®
+ off
);
1375 err
= devctl (ctl_fd
, dev_set
, ®
, regsize
, 0);
1377 fprintf_unfiltered (gdb_stderr
,
1378 "Warning unable to write regset %d: %s\n", regno
,
1379 safe_strerror (err
));
1383 /* Set list of signals to be handled in the target. */
1386 procfs_pass_signals (struct target_ops
*self
,
1387 int numsigs
, unsigned char *pass_signals
)
1391 sigfillset (&run
.trace
);
1393 for (signo
= 1; signo
< NSIG
; signo
++)
1395 int target_signo
= gdb_signal_from_host (signo
);
1396 if (target_signo
< numsigs
&& pass_signals
[target_signo
])
1397 sigdelset (&run
.trace
, signo
);
1402 procfs_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
1404 static char buf
[1024];
1406 struct tidinfo
*tip
;
1408 pid
= ptid_get_pid (ptid
);
1409 tid
= ptid_get_tid (ptid
);
1411 n
= snprintf (buf
, 1023, "process %d", pid
);
1414 tip
= procfs_thread_info (pid
, tid
);
1416 snprintf (&buf
[n
], 1023, " (state = 0x%02x)", tip
->state
);
1422 /* to_can_run implementation for "target procfs". Note this really
1423 means "can this target be the default run target", which there can
1424 be only one, and we make it be "target native" like other ports.
1425 "target procfs <node>" wouldn't make sense as default run target, as
1429 procfs_can_run (struct target_ops
*self
)
1434 /* "target procfs". */
1435 static struct target_ops nto_procfs_ops
;
1437 /* "target native". */
1438 static struct target_ops
*nto_native_ops
;
1440 /* to_open implementation for "target procfs". */
1443 procfs_open (const char *arg
, int from_tty
)
1445 procfs_open_1 (&nto_procfs_ops
, arg
, from_tty
);
1448 /* to_open implementation for "target native". */
1451 procfs_native_open (const char *arg
, int from_tty
)
1453 procfs_open_1 (nto_native_ops
, arg
, from_tty
);
1456 /* Create the "native" and "procfs" targets. */
1459 init_procfs_targets (void)
1461 struct target_ops
*t
= inf_child_target ();
1463 /* Leave to_shortname as "native". */
1464 t
->to_longname
= "QNX Neutrino local process";
1465 t
->to_doc
= "QNX Neutrino local process (started by the \"run\" command).";
1466 t
->to_open
= procfs_native_open
;
1467 t
->to_attach
= procfs_attach
;
1468 t
->to_post_attach
= procfs_post_attach
;
1469 t
->to_detach
= procfs_detach
;
1470 t
->to_resume
= procfs_resume
;
1471 t
->to_wait
= procfs_wait
;
1472 t
->to_fetch_registers
= procfs_fetch_registers
;
1473 t
->to_store_registers
= procfs_store_registers
;
1474 t
->to_xfer_partial
= procfs_xfer_partial
;
1475 t
->to_files_info
= procfs_files_info
;
1476 t
->to_insert_breakpoint
= procfs_insert_breakpoint
;
1477 t
->to_remove_breakpoint
= procfs_remove_breakpoint
;
1478 t
->to_can_use_hw_breakpoint
= procfs_can_use_hw_breakpoint
;
1479 t
->to_insert_hw_breakpoint
= procfs_insert_hw_breakpoint
;
1480 t
->to_remove_hw_breakpoint
= procfs_remove_hw_breakpoint
;
1481 t
->to_insert_watchpoint
= procfs_insert_hw_watchpoint
;
1482 t
->to_remove_watchpoint
= procfs_remove_hw_watchpoint
;
1483 t
->to_stopped_by_watchpoint
= procfs_stopped_by_watchpoint
;
1484 t
->to_kill
= procfs_kill_inferior
;
1485 t
->to_create_inferior
= procfs_create_inferior
;
1486 t
->to_mourn_inferior
= procfs_mourn_inferior
;
1487 t
->to_pass_signals
= procfs_pass_signals
;
1488 t
->to_thread_alive
= procfs_thread_alive
;
1489 t
->to_update_thread_list
= procfs_update_thread_list
;
1490 t
->to_pid_to_str
= procfs_pid_to_str
;
1491 t
->to_interrupt
= procfs_interrupt
;
1492 t
->to_have_continuable_watchpoint
= 1;
1493 t
->to_extra_thread_info
= nto_extra_thread_info
;
1497 /* Register "target native". This is the default run target. */
1500 /* Register "target procfs <node>". */
1501 nto_procfs_ops
= *t
;
1502 nto_procfs_ops
.to_shortname
= "procfs";
1503 nto_procfs_ops
.to_can_run
= procfs_can_run
;
1504 t
->to_longname
= "QNX Neutrino local or remote process";
1505 t
->to_doc
= "QNX Neutrino process. target procfs <node>";
1506 t
->to_open
= procfs_open
;
1508 add_target (&nto_procfs_ops
);
1511 #define OSTYPE_NTO 1
1513 extern initialize_file_ftype _initialize_procfs
;
1516 _initialize_procfs (void)
1520 init_procfs_targets ();
1522 /* We use SIGUSR1 to gain control after we block waiting for a process.
1523 We use sigwaitevent to wait. */
1525 sigaddset (&set
, SIGUSR1
);
1526 sigprocmask (SIG_BLOCK
, &set
, NULL
);
1528 /* Initially, make sure all signals are reported. */
1529 sigfillset (&run
.trace
);
1531 /* Stuff some information. */
1532 nto_cpuinfo_flags
= SYSPAGE_ENTRY (cpuinfo
)->flags
;
1533 nto_cpuinfo_valid
= 1;
1535 add_info ("pidlist", procfs_pidlist
, _("pidlist"));
1536 add_info ("meminfo", procfs_meminfo
, _("memory information"));
1538 nto_is_nto_target
= procfs_is_nto_target
;
1543 procfs_hw_watchpoint (int addr
, int len
, enum target_hw_bp_type type
)
1550 brk
.type
= _DEBUG_BREAK_RD
;
1553 brk
.type
= _DEBUG_BREAK_RW
;
1555 default: /* Modify. */
1556 /* FIXME: brk.type = _DEBUG_BREAK_RWM gives EINVAL for some reason. */
1557 brk
.type
= _DEBUG_BREAK_RW
;
1559 brk
.type
|= _DEBUG_BREAK_HW
; /* Always ask for HW. */
1563 errno
= devctl (ctl_fd
, DCMD_PROC_BREAK
, &brk
, sizeof (brk
), 0);
1566 perror (_("Failed to set hardware watchpoint"));
1573 procfs_can_use_hw_breakpoint (struct target_ops
*self
,
1575 int cnt
, int othertype
)
1581 procfs_remove_hw_watchpoint (struct target_ops
*self
,
1582 CORE_ADDR addr
, int len
,
1583 enum target_hw_bp_type type
,
1584 struct expression
*cond
)
1586 return procfs_hw_watchpoint (addr
, -1, type
);
1590 procfs_insert_hw_watchpoint (struct target_ops
*self
,
1591 CORE_ADDR addr
, int len
,
1592 enum target_hw_bp_type type
,
1593 struct expression
*cond
)
1595 return procfs_hw_watchpoint (addr
, len
, type
);
1599 procfs_stopped_by_watchpoint (struct target_ops
*ops
)