1 /* QNX Neutrino specific low level interface, for the remote server
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
28 #include <sys/procfs.h>
31 #include <sys/iomgr.h>
32 #include <sys/neutrino.h>
35 extern int using_threads
;
36 int using_threads
= 1;
39 nto_trace (const char *fmt
, ...)
43 if (debug_threads
== 0)
45 fprintf (stderr
, "nto:");
46 va_start (arg_list
, fmt
);
47 vfprintf (stderr
, fmt
, arg_list
);
51 #define TRACE nto_trace
53 /* Structure holding neutrino specific information about
58 char nto_procfs_path
[PATH_MAX
];
61 int exit_signo
; /* For tracking exit status. */
64 static struct nto_inferior nto_inferior
;
67 init_nto_inferior (struct nto_inferior
*nto_inferior
)
69 memset (nto_inferior
, 0, sizeof (struct nto_inferior
));
70 nto_inferior
->ctl_fd
= -1;
71 nto_inferior
->pid
= -1;
77 if (nto_inferior
.ctl_fd
!= -1)
79 nto_trace ("Closing fd\n");
80 close (nto_inferior
.ctl_fd
);
81 init_nto_inferior (&nto_inferior
);
85 /* Set current thread. Return 1 on success, 0 otherwise. */
88 nto_set_thread (ptid_t ptid
)
92 TRACE ("%s pid: %d tid: %ld\n", __func__
, ptid_get_pid (ptid
),
94 if (nto_inferior
.ctl_fd
!= -1
95 && !ptid_equal (ptid
, null_ptid
)
96 && !ptid_equal (ptid
, minus_one_ptid
))
98 pthread_t tid
= ptid_get_lwp (ptid
);
100 if (EOK
== devctl (nto_inferior
.ctl_fd
, DCMD_PROC_CURTHREAD
, &tid
,
104 TRACE ("%s: Error: failed to set current thread\n", __func__
);
109 /* This function will determine all alive threads. Note that we do not list
110 dead but unjoined threads even though they are still in the process' thread
113 NTO_INFERIOR must not be NULL. */
116 nto_find_new_threads (struct nto_inferior
*nto_inferior
)
120 TRACE ("%s pid:%d\n", __func__
, nto_inferior
->pid
);
122 if (nto_inferior
->ctl_fd
== -1)
125 for (tid
= 1;; ++tid
)
127 procfs_status status
;
132 err
= devctl (nto_inferior
->ctl_fd
, DCMD_PROC_TIDSTATUS
, &status
,
135 if (err
!= EOK
|| status
.tid
== 0)
138 /* All threads in between are gone. */
139 while (tid
!= status
.tid
|| status
.state
== STATE_DEAD
)
141 struct thread_info
*ti
;
143 ptid
= ptid_build (nto_inferior
->pid
, tid
, 0);
144 ti
= find_thread_ptid (ptid
);
147 TRACE ("Removing thread %d\n", tid
);
150 if (tid
== status
.tid
)
155 if (status
.state
!= STATE_DEAD
)
157 TRACE ("Adding thread %d\n", tid
);
158 ptid
= ptid_build (nto_inferior
->pid
, tid
, 0);
159 if (!find_thread_ptid (ptid
))
160 add_thread (ptid
, NULL
);
165 /* Given pid, open procfs path. */
168 do_attach (pid_t pid
)
170 procfs_status status
;
171 struct sigevent event
;
173 if (nto_inferior
.ctl_fd
!= -1)
175 close (nto_inferior
.ctl_fd
);
176 init_nto_inferior (&nto_inferior
);
178 snprintf (nto_inferior
.nto_procfs_path
, PATH_MAX
- 1, "/proc/%d/as", pid
);
179 nto_inferior
.ctl_fd
= open (nto_inferior
.nto_procfs_path
, O_RDWR
);
180 if (nto_inferior
.ctl_fd
== -1)
182 TRACE ("Failed to open %s\n", nto_inferior
.nto_procfs_path
);
183 init_nto_inferior (&nto_inferior
);
186 if (devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STOP
, &status
, sizeof (status
), 0)
192 nto_inferior
.pid
= pid
;
193 /* Define a sigevent for process stopped notification. */
194 event
.sigev_notify
= SIGEV_SIGNAL_THREAD
;
195 event
.sigev_signo
= SIGUSR1
;
196 event
.sigev_code
= 0;
197 event
.sigev_value
.sival_ptr
= NULL
;
198 event
.sigev_priority
= -1;
199 devctl (nto_inferior
.ctl_fd
, DCMD_PROC_EVENT
, &event
, sizeof (event
), 0);
201 if (devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STATUS
, &status
, sizeof (status
),
203 && (status
.flags
& _DEBUG_FLAG_STOPPED
))
208 ptid
= ptid_build (status
.pid
, status
.tid
, 0);
209 the_low_target
.arch_setup ();
210 add_process (status
.pid
, 1);
211 TRACE ("Adding thread: pid=%d tid=%ld\n", status
.pid
,
212 ptid_get_lwp (ptid
));
213 nto_find_new_threads (&nto_inferior
);
224 /* Read or write LEN bytes from/to inferior's MEMADDR memory address
225 into gdbservers's MYADDR buffer. Return number of bytes actually
229 nto_xfer_memory (off_t memaddr
, unsigned char *myaddr
, int len
,
234 if (lseek (nto_inferior
.ctl_fd
, memaddr
, SEEK_SET
) == memaddr
)
237 nbytes
= write (nto_inferior
.ctl_fd
, myaddr
, len
);
239 nbytes
= read (nto_inferior
.ctl_fd
, myaddr
, len
);
246 TRACE ("Error in %s : errno=%d (%s)\n", __func__
, e
, strerror (e
));
251 /* Insert or remove breakpoint or watchpoint at address ADDR.
252 TYPE can be one of Neutrino breakpoint types. SIZE must be 0 for
253 inserting the point, -1 for removing it.
255 Return 0 on success, 1 otherwise. */
258 nto_breakpoint (CORE_ADDR addr
, int type
, int size
)
265 if (devctl (nto_inferior
.ctl_fd
, DCMD_PROC_BREAK
, &brk
, sizeof (brk
), 0)
271 /* Read auxiliary vector from inferior's initial stack into gdbserver's
272 MYADDR buffer, up to LEN bytes.
274 Return number of bytes read. */
277 nto_read_auxv_from_initial_stack (CORE_ADDR initial_stack
,
278 unsigned char *myaddr
,
283 unsigned int len_read
= 0;
285 /* Skip over argc, argv and envp... Comment from ldd.c:
287 The startup frame is set-up so that we have:
292 envp1 <----- void *frame + (argc + 2) * sizeof(char *)
297 argc <------ void * frame
299 On entry to ldd, frame gives the address of argc on the stack. */
300 if (nto_xfer_memory (initial_stack
, (unsigned char *)&anint
,
301 sizeof (anint
), 0) != sizeof (anint
))
304 /* Size of pointer is assumed to be 4 bytes (32 bit arch. ) */
305 data_ofs
+= (anint
+ 2) * sizeof (void *); /* + 2 comes from argc itself and
306 NULL terminating pointer in
309 /* Now loop over env table: */
310 while (nto_xfer_memory (initial_stack
+ data_ofs
,
311 (unsigned char *)&anint
, sizeof (anint
), 0)
314 data_ofs
+= sizeof (anint
);
318 initial_stack
+= data_ofs
;
320 memset (myaddr
, 0, len
);
321 while (len_read
<= len
- sizeof (auxv_t
))
323 auxv_t
*auxv
= (auxv_t
*)myaddr
;
325 /* Search backwards until we have read AT_PHDR (num. 3),
326 AT_PHENT (num 4), AT_PHNUM (num 5) */
327 if (nto_xfer_memory (initial_stack
, (unsigned char *)auxv
,
328 sizeof (auxv_t
), 0) == sizeof (auxv_t
))
330 if (auxv
->a_type
!= AT_NULL
)
333 len_read
+= sizeof (auxv_t
);
335 if (auxv
->a_type
== AT_PHNUM
) /* That's all we need. */
337 initial_stack
+= sizeof (auxv_t
);
342 TRACE ("auxv: len_read: %d\n", len_read
);
346 /* Start inferior specified by PROGRAM passing arguments ALLARGS. */
349 nto_create_inferior (char *program
, char **allargs
)
351 struct inheritance inherit
;
355 TRACE ("%s %s\n", __func__
, program
);
356 /* Clear any pending SIGUSR1's but keep the behavior the same. */
357 signal (SIGUSR1
, signal (SIGUSR1
, SIG_IGN
));
360 sigaddset (&set
, SIGUSR1
);
361 sigprocmask (SIG_UNBLOCK
, &set
, NULL
);
363 memset (&inherit
, 0, sizeof (inherit
));
364 inherit
.flags
|= SPAWN_SETGROUP
| SPAWN_HOLD
;
365 inherit
.pgroup
= SPAWN_NEWPGROUP
;
366 pid
= spawnp (program
, 0, NULL
, &inherit
, allargs
, 0);
367 sigprocmask (SIG_BLOCK
, &set
, NULL
);
372 if (do_attach (pid
) != pid
)
378 /* Attach to process PID. */
381 nto_attach (unsigned long pid
)
383 TRACE ("%s %ld\n", __func__
, pid
);
384 if (do_attach (pid
) != pid
)
385 error ("Unable to attach to %ld\n", pid
);
389 /* Send signal to process PID. */
394 TRACE ("%s %d\n", __func__
, pid
);
400 /* Detach from process PID. */
405 TRACE ("%s %d\n", __func__
, pid
);
410 /* Check if the given thread is alive.
412 Return 1 if alive, 0 otherwise. */
415 nto_thread_alive (ptid_t ptid
)
419 TRACE ("%s pid:%d tid:%d\n", __func__
, ptid_get_pid (ptid
),
420 ptid_get_lwp (ptid
));
421 if (SignalKill (0, ptid_get_pid (ptid
), ptid_get_lwp (ptid
),
426 TRACE ("%s: %s\n", __func__
, res
? "yes" : "no");
430 /* Resume inferior's execution. */
433 nto_resume (struct thread_resume
*resume_info
, size_t n
)
435 /* We can only work in all-stop mode. */
436 procfs_status status
;
440 TRACE ("%s\n", __func__
);
441 /* Workaround for aliasing rules violation. */
442 sigset_t
*run_fault
= (sigset_t
*) (void *) &run
.fault
;
444 nto_set_thread (resume_info
->thread
);
446 run
.flags
= _DEBUG_RUN_FAULT
| _DEBUG_RUN_TRACE
;
447 if (resume_info
->kind
== resume_step
)
448 run
.flags
|= _DEBUG_RUN_STEP
;
449 run
.flags
|= _DEBUG_RUN_ARM
;
451 sigemptyset (run_fault
);
452 sigaddset (run_fault
, FLTBPT
);
453 sigaddset (run_fault
, FLTTRACE
);
454 sigaddset (run_fault
, FLTILL
);
455 sigaddset (run_fault
, FLTPRIV
);
456 sigaddset (run_fault
, FLTBOUNDS
);
457 sigaddset (run_fault
, FLTIOVF
);
458 sigaddset (run_fault
, FLTIZDIV
);
459 sigaddset (run_fault
, FLTFPE
);
460 sigaddset (run_fault
, FLTPAGE
);
461 sigaddset (run_fault
, FLTSTACK
);
462 sigaddset (run_fault
, FLTACCESS
);
464 sigemptyset (&run
.trace
);
465 if (resume_info
->sig
)
469 devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STATUS
, &status
, sizeof (status
),
471 signal_to_pass
= resume_info
->sig
;
472 if (status
.why
& (_DEBUG_WHY_SIGNALLED
| _DEBUG_WHY_FAULTED
))
474 if (signal_to_pass
!= status
.info
.si_signo
)
476 kill (status
.pid
, signal_to_pass
);
477 run
.flags
|= _DEBUG_RUN_CLRFLT
| _DEBUG_RUN_CLRSIG
;
479 else /* Let it kill the program without telling us. */
480 sigdelset (&run
.trace
, signal_to_pass
);
484 run
.flags
|= _DEBUG_RUN_CLRSIG
| _DEBUG_RUN_CLRFLT
;
486 sigfillset (&run
.trace
);
488 regcache_invalidate ();
490 err
= devctl (nto_inferior
.ctl_fd
, DCMD_PROC_RUN
, &run
, sizeof (run
), 0);
492 TRACE ("Error: %d \"%s\"\n", err
, strerror (err
));
495 /* Wait for inferior's event.
497 Return ptid of thread that caused the event. */
500 nto_wait (ptid_t ptid
,
501 struct target_waitstatus
*ourstatus
, int target_options
)
505 procfs_status status
;
506 const int trace_mask
= (_DEBUG_FLAG_TRACE_EXEC
| _DEBUG_FLAG_TRACE_RD
507 | _DEBUG_FLAG_TRACE_WR
| _DEBUG_FLAG_TRACE_MODIFY
);
509 TRACE ("%s\n", __func__
);
511 ourstatus
->kind
= TARGET_WAITKIND_SPURIOUS
;
514 sigaddset (&set
, SIGUSR1
);
516 devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STATUS
, &status
, sizeof (status
), 0);
517 while (!(status
.flags
& _DEBUG_FLAG_ISTOP
))
519 sigwaitinfo (&set
, &info
);
520 devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STATUS
, &status
, sizeof (status
),
523 nto_find_new_threads (&nto_inferior
);
525 if (status
.flags
& _DEBUG_FLAG_SSTEP
)
528 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
529 ourstatus
->value
.sig
= TARGET_SIGNAL_TRAP
;
531 /* Was it a breakpoint? */
532 else if (status
.flags
& trace_mask
)
535 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
536 ourstatus
->value
.sig
= TARGET_SIGNAL_TRAP
;
538 else if (status
.flags
& _DEBUG_FLAG_ISTOP
)
543 case _DEBUG_WHY_SIGNALLED
:
544 TRACE (" SIGNALLED\n");
545 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
546 ourstatus
->value
.sig
=
547 target_signal_from_host (status
.info
.si_signo
);
548 nto_inferior
.exit_signo
= ourstatus
->value
.sig
;
550 case _DEBUG_WHY_FAULTED
:
551 TRACE (" FAULTED\n");
552 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
553 if (status
.info
.si_signo
== SIGTRAP
)
555 ourstatus
->value
.sig
= 0;
556 nto_inferior
.exit_signo
= 0;
560 ourstatus
->value
.sig
=
561 target_signal_from_host (status
.info
.si_signo
);
562 nto_inferior
.exit_signo
= ourstatus
->value
.sig
;
566 case _DEBUG_WHY_TERMINATED
:
570 TRACE (" TERMINATED\n");
571 waitpid (ptid_get_pid (ptid
), &waitval
, WNOHANG
);
572 if (nto_inferior
.exit_signo
)
574 /* Abnormal death. */
575 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
576 ourstatus
->value
.sig
= nto_inferior
.exit_signo
;
581 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
582 ourstatus
->value
.integer
= WEXITSTATUS (waitval
);
584 nto_inferior
.exit_signo
= 0;
588 case _DEBUG_WHY_REQUESTED
:
589 TRACE ("REQUESTED\n");
590 /* We are assuming a requested stop is due to a SIGINT. */
591 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
592 ourstatus
->value
.sig
= TARGET_SIGNAL_INT
;
593 nto_inferior
.exit_signo
= 0;
598 return ptid_build (status
.pid
, status
.tid
, 0);
601 /* Fetch inferior's registers for currently selected thread (CURRENT_INFERIOR).
602 If REGNO is -1, fetch all registers, or REGNO register only otherwise. */
605 nto_fetch_registers (int regno
)
611 TRACE ("%s (regno=%d)\n", __func__
, regno
);
612 if (regno
>= the_low_target
.num_regs
)
615 if (current_inferior
== NULL
)
617 TRACE ("current_inferior is NULL\n");
620 ptid
= thread_to_gdb_id (current_inferior
);
621 if (!nto_set_thread (ptid
))
624 if (devctl (nto_inferior
.ctl_fd
, DCMD_PROC_GETGREG
, &greg
, sizeof (greg
),
627 if (regno
== -1) /* All registers. */
629 for (regno
= 0; regno
!= the_low_target
.num_regs
; ++regno
)
631 const unsigned int registeroffset
632 = the_low_target
.register_offset (regno
);
633 supply_register (regno
, ((char *)&greg
) + registeroffset
);
638 const unsigned int registeroffset
639 = the_low_target
.register_offset (regno
);
640 if (registeroffset
== -1)
642 supply_register (regno
, ((char *)&greg
) + registeroffset
);
646 TRACE ("ERROR reading registers from inferior.\n");
649 /* Store registers for currently selected thread (CURRENT_INFERIOR).
650 We always store all registers, regardless of REGNO. */
653 nto_store_registers (int regno
)
659 TRACE ("%s (regno:%d)\n", __func__
, regno
);
661 if (current_inferior
== NULL
)
663 TRACE ("current_inferior is NULL\n");
666 ptid
= thread_to_gdb_id (current_inferior
);
667 if (!nto_set_thread (ptid
))
670 memset (&greg
, 0, sizeof (greg
));
671 for (regno
= 0; regno
!= the_low_target
.num_regs
; ++regno
)
673 const unsigned int regoffset
674 = the_low_target
.register_offset (regno
);
675 collect_register (regno
, ((char *)&greg
) + regoffset
);
677 err
= devctl (nto_inferior
.ctl_fd
, DCMD_PROC_SETGREG
, &greg
, sizeof (greg
),
680 TRACE ("Error: setting registers.\n");
683 /* Read LEN bytes from inferior's memory address MEMADDR into
684 gdbserver's MYADDR buffer.
686 Return 0 on success -1 otherwise. */
689 nto_read_memory (CORE_ADDR memaddr
, unsigned char *myaddr
, int len
)
691 TRACE ("%s memaddr:0x%08lx, len:%d\n", __func__
, memaddr
, len
);
693 if (nto_xfer_memory (memaddr
, myaddr
, len
, 0) != len
)
695 TRACE ("Failed to read memory\n");
702 /* Write LEN bytes from gdbserver's buffer MYADDR into inferior's
703 memory at address MEMADDR.
705 Return 0 on success -1 otherwise. */
708 nto_write_memory (CORE_ADDR memaddr
, const unsigned char *myaddr
, int len
)
712 TRACE ("%s memaddr: 0x%08llx len: %d\n", __func__
, memaddr
, len
);
713 if ((len_written
= nto_xfer_memory (memaddr
, (unsigned char *)myaddr
, len
,
717 TRACE ("Wanted to write: %d but written: %d\n", len
, len_written
);
724 /* Stop inferior. We always stop all threads. */
727 nto_request_interrupt (void)
729 TRACE ("%s\n", __func__
);
730 nto_set_thread (ptid_build (nto_inferior
.pid
, 1, 0));
731 if (EOK
!= devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STOP
, NULL
, 0, 0))
732 TRACE ("Error stopping inferior.\n");
735 /* Read auxiliary vector from inferior's memory into gdbserver's buffer
736 MYADDR. We always read whole auxv.
738 Return number of bytes stored in MYADDR buffer, 0 if OFFSET > 0
742 nto_read_auxv (CORE_ADDR offset
, unsigned char *myaddr
, unsigned int len
)
745 CORE_ADDR initial_stack
;
746 procfs_info procinfo
;
748 TRACE ("%s\n", __func__
);
752 err
= devctl (nto_inferior
.ctl_fd
, DCMD_PROC_INFO
, &procinfo
,
757 initial_stack
= procinfo
.initial_stack
;
759 return nto_read_auxv_from_initial_stack (initial_stack
, myaddr
, len
);
762 /* Insert {break/watch}point at address ADDR.
763 TYPE must be in '0'..'4' range. LEN is not used. */
766 nto_insert_point (char type
, CORE_ADDR addr
, int len
)
768 int wtype
= _DEBUG_BREAK_HW
; /* Always request HW. */
770 TRACE ("%s type:%c addr: 0x%08lx len:%d\n", __func__
, (int)type
, addr
, len
);
773 case '0': /* software-breakpoint */
774 wtype
= _DEBUG_BREAK_EXEC
;
776 case '1': /* hardware-breakpoint */
777 wtype
|= _DEBUG_BREAK_EXEC
;
779 case '2': /* write watchpoint */
780 wtype
|= _DEBUG_BREAK_RW
;
782 case '3': /* read watchpoint */
783 wtype
|= _DEBUG_BREAK_RD
;
785 case '4': /* access watchpoint */
786 wtype
|= _DEBUG_BREAK_RW
;
789 return 1; /* Not supported. */
791 return nto_breakpoint (addr
, wtype
, 0);
794 /* Remove {break/watch}point at address ADDR.
795 TYPE must be in '0'..'4' range. LEN is not used. */
798 nto_remove_point (char type
, CORE_ADDR addr
, int len
)
800 int wtype
= _DEBUG_BREAK_HW
; /* Always request HW. */
802 TRACE ("%s type:%c addr: 0x%08lx len:%d\n", __func__
, (int)type
, addr
, len
);
805 case '0': /* software-breakpoint */
806 wtype
= _DEBUG_BREAK_EXEC
;
808 case '1': /* hardware-breakpoint */
809 wtype
|= _DEBUG_BREAK_EXEC
;
811 case '2': /* write watchpoint */
812 wtype
|= _DEBUG_BREAK_RW
;
814 case '3': /* read watchpoint */
815 wtype
|= _DEBUG_BREAK_RD
;
817 case '4': /* access watchpoint */
818 wtype
|= _DEBUG_BREAK_RW
;
821 return 1; /* Not supported. */
823 return nto_breakpoint (addr
, wtype
, -1);
826 /* Check if the reason of stop for current thread (CURRENT_INFERIOR) is
829 Return 1 if stopped by watchpoint, 0 otherwise. */
832 nto_stopped_by_watchpoint (void)
836 TRACE ("%s\n", __func__
);
837 if (nto_inferior
.ctl_fd
!= -1 && current_inferior
!= NULL
)
841 ptid
= thread_to_gdb_id (current_inferior
);
842 if (nto_set_thread (ptid
))
844 const int watchmask
= _DEBUG_FLAG_TRACE_RD
| _DEBUG_FLAG_TRACE_WR
845 | _DEBUG_FLAG_TRACE_MODIFY
;
846 procfs_status status
;
849 err
= devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STATUS
, &status
,
851 if (err
== EOK
&& (status
.flags
& watchmask
))
855 TRACE ("%s: %s\n", __func__
, ret
? "yes" : "no");
859 /* Get instruction pointer for CURRENT_INFERIOR thread.
861 Return inferior's instruction pointer value, or 0 on error. */
864 nto_stopped_data_address (void)
866 CORE_ADDR ret
= (CORE_ADDR
)0;
868 TRACE ("%s\n", __func__
);
869 if (nto_inferior
.ctl_fd
!= -1 && current_inferior
!= NULL
)
873 ptid
= thread_to_gdb_id (current_inferior
);
875 if (nto_set_thread (ptid
))
877 procfs_status status
;
879 if (devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STATUS
, &status
,
880 sizeof (status
), 0) == EOK
)
884 TRACE ("%s: 0x%08lx\n", __func__
, ret
);
888 /* We do not currently support non-stop. */
891 nto_supports_non_stop (void)
893 TRACE ("%s\n", __func__
);
899 static struct target_ops nto_target_ops
= {
912 NULL
, /* nto_look_up_symbols */
913 nto_request_interrupt
,
917 nto_stopped_by_watchpoint
,
918 nto_stopped_data_address
,
919 NULL
, /* nto_read_offsets */
920 NULL
, /* thread_db_set_tls_address */
922 hostio_last_error_from_errno
,
923 NULL
, /* nto_qxfer_osdata */
924 NULL
, /* xfer_siginfo */
925 nto_supports_non_stop
,
927 NULL
/* start_non_stop */
931 /* Global function called by server.c. Initializes QNX Neutrino
935 initialize_low (void)
939 TRACE ("%s\n", __func__
);
940 set_target_ops (&nto_target_ops
);
941 set_breakpoint_data (the_low_target
.breakpoint
,
942 the_low_target
.breakpoint_len
);
944 /* We use SIGUSR1 to gain control after we block waiting for a process.
945 We use sigwaitevent to wait. */
947 sigaddset (&set
, SIGUSR1
);
948 sigprocmask (SIG_BLOCK
, &set
, NULL
);