1 /* QNX Neutrino specific low level interface, for the remote server
3 Copyright (C) 2009-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "gdbthread.h"
29 #include <sys/procfs.h>
31 #include <sys/iomgr.h>
32 #include <sys/neutrino.h>
35 extern int using_threads
;
36 int using_threads
= 1;
38 const struct target_desc
*nto_tdesc
;
41 nto_trace (const char *fmt
, ...)
45 if (debug_threads
== 0)
47 fprintf (stderr
, "nto:");
48 va_start (arg_list
, fmt
);
49 vfprintf (stderr
, fmt
, arg_list
);
53 #define TRACE nto_trace
55 /* Structure holding neutrino specific information about
60 char nto_procfs_path
[PATH_MAX
];
63 int exit_signo
; /* For tracking exit status. */
66 static struct nto_inferior nto_inferior
;
69 init_nto_inferior (struct nto_inferior
*nto_inferior
)
71 memset (nto_inferior
, 0, sizeof (struct nto_inferior
));
72 nto_inferior
->ctl_fd
= -1;
73 nto_inferior
->pid
= -1;
79 if (nto_inferior
.ctl_fd
!= -1)
81 nto_trace ("Closing fd\n");
82 close (nto_inferior
.ctl_fd
);
83 init_nto_inferior (&nto_inferior
);
87 /* Set current thread. Return 1 on success, 0 otherwise. */
90 nto_set_thread (ptid_t ptid
)
94 TRACE ("%s pid: %d tid: %ld\n", __func__
, ptid_get_pid (ptid
),
96 if (nto_inferior
.ctl_fd
!= -1
97 && !ptid_equal (ptid
, null_ptid
)
98 && !ptid_equal (ptid
, minus_one_ptid
))
100 pthread_t tid
= ptid_get_lwp (ptid
);
102 if (EOK
== devctl (nto_inferior
.ctl_fd
, DCMD_PROC_CURTHREAD
, &tid
,
106 TRACE ("%s: Error: failed to set current thread\n", __func__
);
111 /* This function will determine all alive threads. Note that we do not list
112 dead but unjoined threads even though they are still in the process' thread
115 NTO_INFERIOR must not be NULL. */
118 nto_find_new_threads (struct nto_inferior
*nto_inferior
)
122 TRACE ("%s pid:%d\n", __func__
, nto_inferior
->pid
);
124 if (nto_inferior
->ctl_fd
== -1)
127 for (tid
= 1;; ++tid
)
129 procfs_status status
;
134 err
= devctl (nto_inferior
->ctl_fd
, DCMD_PROC_TIDSTATUS
, &status
,
137 if (err
!= EOK
|| status
.tid
== 0)
140 /* All threads in between are gone. */
141 while (tid
!= status
.tid
|| status
.state
== STATE_DEAD
)
143 struct thread_info
*ti
;
145 ptid
= ptid_build (nto_inferior
->pid
, tid
, 0);
146 ti
= find_thread_ptid (ptid
);
149 TRACE ("Removing thread %d\n", tid
);
152 if (tid
== status
.tid
)
157 if (status
.state
!= STATE_DEAD
)
159 TRACE ("Adding thread %d\n", tid
);
160 ptid
= ptid_build (nto_inferior
->pid
, tid
, 0);
161 if (!find_thread_ptid (ptid
))
162 add_thread (ptid
, NULL
);
167 /* Given pid, open procfs path. */
170 do_attach (pid_t pid
)
172 procfs_status status
;
173 struct sigevent event
;
175 if (nto_inferior
.ctl_fd
!= -1)
177 close (nto_inferior
.ctl_fd
);
178 init_nto_inferior (&nto_inferior
);
180 xsnprintf (nto_inferior
.nto_procfs_path
, PATH_MAX
- 1, "/proc/%d/as", pid
);
181 nto_inferior
.ctl_fd
= open (nto_inferior
.nto_procfs_path
, O_RDWR
);
182 if (nto_inferior
.ctl_fd
== -1)
184 TRACE ("Failed to open %s\n", nto_inferior
.nto_procfs_path
);
185 init_nto_inferior (&nto_inferior
);
188 if (devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STOP
, &status
, sizeof (status
), 0)
194 nto_inferior
.pid
= pid
;
195 /* Define a sigevent for process stopped notification. */
196 event
.sigev_notify
= SIGEV_SIGNAL_THREAD
;
197 event
.sigev_signo
= SIGUSR1
;
198 event
.sigev_code
= 0;
199 event
.sigev_value
.sival_ptr
= NULL
;
200 event
.sigev_priority
= -1;
201 devctl (nto_inferior
.ctl_fd
, DCMD_PROC_EVENT
, &event
, sizeof (event
), 0);
203 if (devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STATUS
, &status
, sizeof (status
),
205 && (status
.flags
& _DEBUG_FLAG_STOPPED
))
208 struct process_info
*proc
;
211 ptid
= ptid_build (status
.pid
, status
.tid
, 0);
212 the_low_target
.arch_setup ();
213 proc
= add_process (status
.pid
, 1);
214 proc
->tdesc
= nto_tdesc
;
215 TRACE ("Adding thread: pid=%d tid=%ld\n", status
.pid
,
216 ptid_get_lwp (ptid
));
217 nto_find_new_threads (&nto_inferior
);
228 /* Read or write LEN bytes from/to inferior's MEMADDR memory address
229 into gdbservers's MYADDR buffer. Return number of bytes actually
233 nto_xfer_memory (off_t memaddr
, unsigned char *myaddr
, int len
,
238 if (lseek (nto_inferior
.ctl_fd
, memaddr
, SEEK_SET
) == memaddr
)
241 nbytes
= write (nto_inferior
.ctl_fd
, myaddr
, len
);
243 nbytes
= read (nto_inferior
.ctl_fd
, myaddr
, len
);
250 TRACE ("Error in %s : errno=%d (%s)\n", __func__
, e
, strerror (e
));
255 /* Insert or remove breakpoint or watchpoint at address ADDR.
256 TYPE can be one of Neutrino breakpoint types. SIZE must be 0 for
257 inserting the point, -1 for removing it.
259 Return 0 on success, 1 otherwise. */
262 nto_breakpoint (CORE_ADDR addr
, int type
, int size
)
269 if (devctl (nto_inferior
.ctl_fd
, DCMD_PROC_BREAK
, &brk
, sizeof (brk
), 0)
275 /* Read auxiliary vector from inferior's initial stack into gdbserver's
276 MYADDR buffer, up to LEN bytes.
278 Return number of bytes read. */
281 nto_read_auxv_from_initial_stack (CORE_ADDR initial_stack
,
282 unsigned char *myaddr
,
287 unsigned int len_read
= 0;
289 /* Skip over argc, argv and envp... Comment from ldd.c:
291 The startup frame is set-up so that we have:
296 envp1 <----- void *frame + (argc + 2) * sizeof(char *)
301 argc <------ void * frame
303 On entry to ldd, frame gives the address of argc on the stack. */
304 if (nto_xfer_memory (initial_stack
, (unsigned char *)&anint
,
305 sizeof (anint
), 0) != sizeof (anint
))
308 /* Size of pointer is assumed to be 4 bytes (32 bit arch. ) */
309 data_ofs
+= (anint
+ 2) * sizeof (void *); /* + 2 comes from argc itself and
310 NULL terminating pointer in
313 /* Now loop over env table: */
314 while (nto_xfer_memory (initial_stack
+ data_ofs
,
315 (unsigned char *)&anint
, sizeof (anint
), 0)
318 data_ofs
+= sizeof (anint
);
322 initial_stack
+= data_ofs
;
324 memset (myaddr
, 0, len
);
325 while (len_read
<= len
- sizeof (auxv_t
))
327 auxv_t
*auxv
= (auxv_t
*)myaddr
;
329 /* Search backwards until we have read AT_PHDR (num. 3),
330 AT_PHENT (num 4), AT_PHNUM (num 5) */
331 if (nto_xfer_memory (initial_stack
, (unsigned char *)auxv
,
332 sizeof (auxv_t
), 0) == sizeof (auxv_t
))
334 if (auxv
->a_type
!= AT_NULL
)
337 len_read
+= sizeof (auxv_t
);
339 if (auxv
->a_type
== AT_PHNUM
) /* That's all we need. */
341 initial_stack
+= sizeof (auxv_t
);
346 TRACE ("auxv: len_read: %d\n", len_read
);
350 /* Start inferior specified by PROGRAM passing arguments ALLARGS. */
353 nto_create_inferior (char *program
, char **allargs
)
355 struct inheritance inherit
;
359 TRACE ("%s %s\n", __func__
, program
);
360 /* Clear any pending SIGUSR1's but keep the behavior the same. */
361 signal (SIGUSR1
, signal (SIGUSR1
, SIG_IGN
));
364 sigaddset (&set
, SIGUSR1
);
365 sigprocmask (SIG_UNBLOCK
, &set
, NULL
);
367 memset (&inherit
, 0, sizeof (inherit
));
368 inherit
.flags
|= SPAWN_SETGROUP
| SPAWN_HOLD
;
369 inherit
.pgroup
= SPAWN_NEWPGROUP
;
370 pid
= spawnp (program
, 0, NULL
, &inherit
, allargs
, 0);
371 sigprocmask (SIG_BLOCK
, &set
, NULL
);
376 if (do_attach (pid
) != pid
)
382 /* Attach to process PID. */
385 nto_attach (unsigned long pid
)
387 TRACE ("%s %ld\n", __func__
, pid
);
388 if (do_attach (pid
) != pid
)
389 error ("Unable to attach to %ld\n", pid
);
393 /* Send signal to process PID. */
398 TRACE ("%s %d\n", __func__
, pid
);
404 /* Detach from process PID. */
409 TRACE ("%s %d\n", __func__
, pid
);
415 nto_mourn (struct process_info
*process
)
417 remove_process (process
);
420 /* Check if the given thread is alive.
422 Return 1 if alive, 0 otherwise. */
425 nto_thread_alive (ptid_t ptid
)
429 TRACE ("%s pid:%d tid:%d\n", __func__
, ptid_get_pid (ptid
),
430 ptid_get_lwp (ptid
));
431 if (SignalKill (0, ptid_get_pid (ptid
), ptid_get_lwp (ptid
),
436 TRACE ("%s: %s\n", __func__
, res
? "yes" : "no");
440 /* Resume inferior's execution. */
443 nto_resume (struct thread_resume
*resume_info
, size_t n
)
445 /* We can only work in all-stop mode. */
446 procfs_status status
;
450 TRACE ("%s\n", __func__
);
451 /* Workaround for aliasing rules violation. */
452 sigset_t
*run_fault
= (sigset_t
*) (void *) &run
.fault
;
454 nto_set_thread (resume_info
->thread
);
456 run
.flags
= _DEBUG_RUN_FAULT
| _DEBUG_RUN_TRACE
;
457 if (resume_info
->kind
== resume_step
)
458 run
.flags
|= _DEBUG_RUN_STEP
;
459 run
.flags
|= _DEBUG_RUN_ARM
;
461 sigemptyset (run_fault
);
462 sigaddset (run_fault
, FLTBPT
);
463 sigaddset (run_fault
, FLTTRACE
);
464 sigaddset (run_fault
, FLTILL
);
465 sigaddset (run_fault
, FLTPRIV
);
466 sigaddset (run_fault
, FLTBOUNDS
);
467 sigaddset (run_fault
, FLTIOVF
);
468 sigaddset (run_fault
, FLTIZDIV
);
469 sigaddset (run_fault
, FLTFPE
);
470 sigaddset (run_fault
, FLTPAGE
);
471 sigaddset (run_fault
, FLTSTACK
);
472 sigaddset (run_fault
, FLTACCESS
);
474 sigemptyset (&run
.trace
);
475 if (resume_info
->sig
)
479 devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STATUS
, &status
, sizeof (status
),
481 signal_to_pass
= resume_info
->sig
;
482 if (status
.why
& (_DEBUG_WHY_SIGNALLED
| _DEBUG_WHY_FAULTED
))
484 if (signal_to_pass
!= status
.info
.si_signo
)
486 kill (status
.pid
, signal_to_pass
);
487 run
.flags
|= _DEBUG_RUN_CLRFLT
| _DEBUG_RUN_CLRSIG
;
489 else /* Let it kill the program without telling us. */
490 sigdelset (&run
.trace
, signal_to_pass
);
494 run
.flags
|= _DEBUG_RUN_CLRSIG
| _DEBUG_RUN_CLRFLT
;
496 sigfillset (&run
.trace
);
498 regcache_invalidate ();
500 err
= devctl (nto_inferior
.ctl_fd
, DCMD_PROC_RUN
, &run
, sizeof (run
), 0);
502 TRACE ("Error: %d \"%s\"\n", err
, strerror (err
));
505 /* Wait for inferior's event.
507 Return ptid of thread that caused the event. */
510 nto_wait (ptid_t ptid
,
511 struct target_waitstatus
*ourstatus
, int target_options
)
515 procfs_status status
;
516 const int trace_mask
= (_DEBUG_FLAG_TRACE_EXEC
| _DEBUG_FLAG_TRACE_RD
517 | _DEBUG_FLAG_TRACE_WR
| _DEBUG_FLAG_TRACE_MODIFY
);
519 TRACE ("%s\n", __func__
);
521 ourstatus
->kind
= TARGET_WAITKIND_SPURIOUS
;
524 sigaddset (&set
, SIGUSR1
);
526 devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STATUS
, &status
, sizeof (status
), 0);
527 while (!(status
.flags
& _DEBUG_FLAG_ISTOP
))
529 sigwaitinfo (&set
, &info
);
530 devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STATUS
, &status
, sizeof (status
),
533 nto_find_new_threads (&nto_inferior
);
535 if (status
.flags
& _DEBUG_FLAG_SSTEP
)
538 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
539 ourstatus
->value
.sig
= GDB_SIGNAL_TRAP
;
541 /* Was it a breakpoint? */
542 else if (status
.flags
& trace_mask
)
545 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
546 ourstatus
->value
.sig
= GDB_SIGNAL_TRAP
;
548 else if (status
.flags
& _DEBUG_FLAG_ISTOP
)
553 case _DEBUG_WHY_SIGNALLED
:
554 TRACE (" SIGNALLED\n");
555 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
556 ourstatus
->value
.sig
=
557 gdb_signal_from_host (status
.info
.si_signo
);
558 nto_inferior
.exit_signo
= ourstatus
->value
.sig
;
560 case _DEBUG_WHY_FAULTED
:
561 TRACE (" FAULTED\n");
562 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
563 if (status
.info
.si_signo
== SIGTRAP
)
565 ourstatus
->value
.sig
= 0;
566 nto_inferior
.exit_signo
= 0;
570 ourstatus
->value
.sig
=
571 gdb_signal_from_host (status
.info
.si_signo
);
572 nto_inferior
.exit_signo
= ourstatus
->value
.sig
;
576 case _DEBUG_WHY_TERMINATED
:
580 TRACE (" TERMINATED\n");
581 waitpid (ptid_get_pid (ptid
), &waitval
, WNOHANG
);
582 if (nto_inferior
.exit_signo
)
584 /* Abnormal death. */
585 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
586 ourstatus
->value
.sig
= nto_inferior
.exit_signo
;
591 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
592 ourstatus
->value
.integer
= WEXITSTATUS (waitval
);
594 nto_inferior
.exit_signo
= 0;
598 case _DEBUG_WHY_REQUESTED
:
599 TRACE ("REQUESTED\n");
600 /* We are assuming a requested stop is due to a SIGINT. */
601 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
602 ourstatus
->value
.sig
= GDB_SIGNAL_INT
;
603 nto_inferior
.exit_signo
= 0;
608 return ptid_build (status
.pid
, status
.tid
, 0);
611 /* Fetch inferior's registers for currently selected thread (CURRENT_INFERIOR).
612 If REGNO is -1, fetch all registers, or REGNO register only otherwise. */
615 nto_fetch_registers (struct regcache
*regcache
, int regno
)
621 TRACE ("%s (regno=%d)\n", __func__
, regno
);
622 if (regno
>= the_low_target
.num_regs
)
625 if (current_thread
== NULL
)
627 TRACE ("current_thread is NULL\n");
630 ptid
= thread_to_gdb_id (current_thread
);
631 if (!nto_set_thread (ptid
))
634 if (devctl (nto_inferior
.ctl_fd
, DCMD_PROC_GETGREG
, &greg
, sizeof (greg
),
637 if (regno
== -1) /* All registers. */
639 for (regno
= 0; regno
!= the_low_target
.num_regs
; ++regno
)
641 const unsigned int registeroffset
642 = the_low_target
.register_offset (regno
);
643 supply_register (regcache
, regno
,
644 ((char *)&greg
) + registeroffset
);
649 const unsigned int registeroffset
650 = the_low_target
.register_offset (regno
);
651 if (registeroffset
== -1)
653 supply_register (regcache
, regno
, ((char *)&greg
) + registeroffset
);
657 TRACE ("ERROR reading registers from inferior.\n");
660 /* Store registers for currently selected thread (CURRENT_INFERIOR).
661 We always store all registers, regardless of REGNO. */
664 nto_store_registers (struct regcache
*regcache
, int regno
)
670 TRACE ("%s (regno:%d)\n", __func__
, regno
);
672 if (current_thread
== NULL
)
674 TRACE ("current_thread is NULL\n");
677 ptid
= thread_to_gdb_id (current_thread
);
678 if (!nto_set_thread (ptid
))
681 memset (&greg
, 0, sizeof (greg
));
682 for (regno
= 0; regno
!= the_low_target
.num_regs
; ++regno
)
684 const unsigned int regoffset
685 = the_low_target
.register_offset (regno
);
686 collect_register (regcache
, regno
, ((char *)&greg
) + regoffset
);
688 err
= devctl (nto_inferior
.ctl_fd
, DCMD_PROC_SETGREG
, &greg
, sizeof (greg
),
691 TRACE ("Error: setting registers.\n");
694 /* Read LEN bytes from inferior's memory address MEMADDR into
695 gdbserver's MYADDR buffer.
697 Return 0 on success -1 otherwise. */
700 nto_read_memory (CORE_ADDR memaddr
, unsigned char *myaddr
, int len
)
702 TRACE ("%s memaddr:0x%08lx, len:%d\n", __func__
, memaddr
, len
);
704 if (nto_xfer_memory (memaddr
, myaddr
, len
, 0) != len
)
706 TRACE ("Failed to read memory\n");
713 /* Write LEN bytes from gdbserver's buffer MYADDR into inferior's
714 memory at address MEMADDR.
716 Return 0 on success -1 otherwise. */
719 nto_write_memory (CORE_ADDR memaddr
, const unsigned char *myaddr
, int len
)
723 TRACE ("%s memaddr: 0x%08llx len: %d\n", __func__
, memaddr
, len
);
724 if ((len_written
= nto_xfer_memory (memaddr
, (unsigned char *)myaddr
, len
,
728 TRACE ("Wanted to write: %d but written: %d\n", len
, len_written
);
735 /* Stop inferior. We always stop all threads. */
738 nto_request_interrupt (void)
740 TRACE ("%s\n", __func__
);
741 nto_set_thread (ptid_build (nto_inferior
.pid
, 1, 0));
742 if (EOK
!= devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STOP
, NULL
, 0, 0))
743 TRACE ("Error stopping inferior.\n");
746 /* Read auxiliary vector from inferior's memory into gdbserver's buffer
747 MYADDR. We always read whole auxv.
749 Return number of bytes stored in MYADDR buffer, 0 if OFFSET > 0
753 nto_read_auxv (CORE_ADDR offset
, unsigned char *myaddr
, unsigned int len
)
756 CORE_ADDR initial_stack
;
757 procfs_info procinfo
;
759 TRACE ("%s\n", __func__
);
763 err
= devctl (nto_inferior
.ctl_fd
, DCMD_PROC_INFO
, &procinfo
,
768 initial_stack
= procinfo
.initial_stack
;
770 return nto_read_auxv_from_initial_stack (initial_stack
, myaddr
, len
);
774 nto_supports_z_point_type (char z_type
)
780 case Z_PACKET_WRITE_WP
:
781 case Z_PACKET_READ_WP
:
782 case Z_PACKET_ACCESS_WP
:
789 /* Insert {break/watch}point at address ADDR. SIZE is not used. */
792 nto_insert_point (enum raw_bkpt_type type
, CORE_ADDR addr
,
793 int size
, struct raw_breakpoint
*bp
)
795 int wtype
= _DEBUG_BREAK_HW
; /* Always request HW. */
797 TRACE ("%s type:%c addr: 0x%08lx len:%d\n", __func__
, (int)type
, addr
, len
);
800 case raw_bkpt_type_sw
:
801 wtype
= _DEBUG_BREAK_EXEC
;
803 case raw_bkpt_type_hw
:
804 wtype
|= _DEBUG_BREAK_EXEC
;
806 case raw_bkpt_type_write_wp
:
807 wtype
|= _DEBUG_BREAK_RW
;
809 case raw_bkpt_type_read_wp
:
810 wtype
|= _DEBUG_BREAK_RD
;
812 case raw_bkpt_type_access_wp
:
813 wtype
|= _DEBUG_BREAK_RW
;
816 return 1; /* Not supported. */
818 return nto_breakpoint (addr
, wtype
, 0);
821 /* Remove {break/watch}point at address ADDR. SIZE is not used. */
824 nto_remove_point (enum raw_bkpt_type type
, CORE_ADDR addr
,
825 int size
, struct raw_breakpoint
*bp
)
827 int wtype
= _DEBUG_BREAK_HW
; /* Always request HW. */
829 TRACE ("%s type:%c addr: 0x%08lx len:%d\n", __func__
, (int)type
, addr
, len
);
832 case raw_bkpt_type_sw
:
833 wtype
= _DEBUG_BREAK_EXEC
;
835 case raw_bkpt_type_hw
:
836 wtype
|= _DEBUG_BREAK_EXEC
;
838 case raw_bkpt_type_write_wp
:
839 wtype
|= _DEBUG_BREAK_RW
;
841 case raw_bkpt_type_read_wp
:
842 wtype
|= _DEBUG_BREAK_RD
;
844 case raw_bkpt_type_access_wp
:
845 wtype
|= _DEBUG_BREAK_RW
;
848 return 1; /* Not supported. */
850 return nto_breakpoint (addr
, wtype
, -1);
853 /* Check if the reason of stop for current thread (CURRENT_INFERIOR) is
856 Return 1 if stopped by watchpoint, 0 otherwise. */
859 nto_stopped_by_watchpoint (void)
863 TRACE ("%s\n", __func__
);
864 if (nto_inferior
.ctl_fd
!= -1 && current_thread
!= NULL
)
868 ptid
= thread_to_gdb_id (current_thread
);
869 if (nto_set_thread (ptid
))
871 const int watchmask
= _DEBUG_FLAG_TRACE_RD
| _DEBUG_FLAG_TRACE_WR
872 | _DEBUG_FLAG_TRACE_MODIFY
;
873 procfs_status status
;
876 err
= devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STATUS
, &status
,
878 if (err
== EOK
&& (status
.flags
& watchmask
))
882 TRACE ("%s: %s\n", __func__
, ret
? "yes" : "no");
886 /* Get instruction pointer for CURRENT_INFERIOR thread.
888 Return inferior's instruction pointer value, or 0 on error. */
891 nto_stopped_data_address (void)
893 CORE_ADDR ret
= (CORE_ADDR
)0;
895 TRACE ("%s\n", __func__
);
896 if (nto_inferior
.ctl_fd
!= -1 && current_thread
!= NULL
)
900 ptid
= thread_to_gdb_id (current_thread
);
902 if (nto_set_thread (ptid
))
904 procfs_status status
;
906 if (devctl (nto_inferior
.ctl_fd
, DCMD_PROC_STATUS
, &status
,
907 sizeof (status
), 0) == EOK
)
911 TRACE ("%s: 0x%08lx\n", __func__
, ret
);
915 /* We do not currently support non-stop. */
918 nto_supports_non_stop (void)
920 TRACE ("%s\n", __func__
);
926 static struct target_ops nto_target_ops
= {
928 NULL
, /* arch_setup */
939 NULL
, /* prepare_to_access_memory */
940 NULL
, /* done_accessing_memory */
943 NULL
, /* nto_look_up_symbols */
944 nto_request_interrupt
,
946 nto_supports_z_point_type
,
949 NULL
, /* stopped_by_sw_breakpoint */
950 NULL
, /* supports_stopped_by_sw_breakpoint */
951 NULL
, /* stopped_by_hw_breakpoint */
952 NULL
, /* supports_stopped_by_hw_breakpoint */
953 /* Although nto has hardware single step, still disable this
954 feature for not, because it is implemented in linux-low.c instead
955 of in generic code. */
956 NULL
, /* supports_conditional_breakpoints */
957 nto_stopped_by_watchpoint
,
958 nto_stopped_data_address
,
959 NULL
, /* nto_read_offsets */
960 NULL
, /* thread_db_set_tls_address */
962 hostio_last_error_from_errno
,
963 NULL
, /* nto_qxfer_osdata */
964 NULL
, /* xfer_siginfo */
965 nto_supports_non_stop
,
967 NULL
/* start_non_stop */
971 /* Global function called by server.c. Initializes QNX Neutrino
975 initialize_low (void)
979 TRACE ("%s\n", __func__
);
980 set_target_ops (&nto_target_ops
);
981 set_breakpoint_data (the_low_target
.breakpoint
,
982 the_low_target
.breakpoint_len
);
984 /* We use SIGUSR1 to gain control after we block waiting for a process.
985 We use sigwaitevent to wait. */
987 sigaddset (&set
, SIGUSR1
);
988 sigprocmask (SIG_BLOCK
, &set
, NULL
);