1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2016 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/>. */
20 /* See the GDB User Guide for details of the GDB remote protocol. */
30 /*#include "terminal.h" */
33 #include "gdb-stabs.h"
34 #include "gdbthread.h"
36 #include "remote-notif.h"
41 #include "cli/cli-decode.h"
42 #include "cli/cli-setshow.h"
43 #include "target-descriptions.h"
45 #include "filestuff.h"
50 #include "gdb_sys_time.h"
52 #include "event-loop.h"
53 #include "event-top.h"
59 #include "gdbcore.h" /* for exec_bfd */
61 #include "remote-fileio.h"
62 #include "gdb/fileio.h"
64 #include "xml-support.h"
66 #include "memory-map.h"
68 #include "tracepoint.h"
74 /* Temp hacks for tracepoint encoding migration. */
75 static char *target_buf;
76 static long target_buf_size;
78 /* Per-program-space data key. */
79 static const struct program_space_data *remote_pspace_data;
81 /* The variable registered as the control variable used by the
82 remote exec-file commands. While the remote exec-file setting is
83 per-program-space, the set/show machinery uses this as the
84 location of the remote exec-file value. */
85 static char *remote_exec_file_var;
87 /* The size to align memory write packets, when practical. The protocol
88 does not guarantee any alignment, and gdb will generate short
89 writes and unaligned writes, but even as a best-effort attempt this
90 can improve bulk transfers. For instance, if a write is misaligned
91 relative to the target's data bus, the stub may need to make an extra
92 round trip fetching data from the target. This doesn't make a
93 huge difference, but it's easy to do, so we try to be helpful.
95 The alignment chosen is arbitrary; usually data bus width is
96 important here, not the possibly larger cache line size. */
97 enum { REMOTE_ALIGN_WRITES = 16 };
99 /* Prototypes for local functions. */
100 static int getpkt_sane (char **buf, long *sizeof_buf, int forever);
101 static int getpkt_or_notif_sane (char **buf, long *sizeof_buf,
102 int forever, int *is_notif);
104 static void remote_files_info (struct target_ops *ignore);
106 static void remote_prepare_to_store (struct target_ops *self,
107 struct regcache *regcache);
109 static void remote_open_1 (const char *, int, struct target_ops *,
112 static void remote_close (struct target_ops *self);
116 static int remote_vkill (int pid, struct remote_state *rs);
118 static void remote_kill_k (void);
120 static void remote_mourn (struct target_ops *ops);
122 static void extended_remote_restart (void);
124 static void remote_send (char **buf, long *sizeof_buf_p);
126 static int readchar (int timeout);
128 static void remote_serial_write (const char *str, int len);
130 static void remote_kill (struct target_ops *ops);
132 static int remote_can_async_p (struct target_ops *);
134 static int remote_is_async_p (struct target_ops *);
136 static void remote_async (struct target_ops *ops, int enable);
138 static void remote_thread_events (struct target_ops *ops, int enable);
140 static void interrupt_query (void);
142 static void set_general_thread (struct ptid ptid);
143 static void set_continue_thread (struct ptid ptid);
145 static void get_offsets (void);
147 static void skip_frame (void);
149 static long read_frame (char **buf_p, long *sizeof_buf);
151 static int hexnumlen (ULONGEST num);
153 static void init_remote_ops (void);
155 static void init_extended_remote_ops (void);
157 static void remote_stop (struct target_ops *self, ptid_t);
159 static int stubhex (int ch);
161 static int hexnumstr (char *, ULONGEST);
163 static int hexnumnstr (char *, ULONGEST, int);
165 static CORE_ADDR remote_address_masked (CORE_ADDR);
167 static void print_packet (const char *);
169 static void compare_sections_command (char *, int);
171 static void packet_command (char *, int);
173 static int stub_unpack_int (char *buff, int fieldlength);
175 static ptid_t remote_current_thread (ptid_t oldptid);
177 static int putpkt_binary (const char *buf, int cnt);
179 static void check_binary_download (CORE_ADDR addr);
181 struct packet_config;
183 static void show_packet_config_cmd (struct packet_config *config);
185 static void show_remote_protocol_packet_cmd (struct ui_file *file,
187 struct cmd_list_element *c,
190 static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid);
191 static ptid_t read_ptid (char *buf, char **obuf);
193 static void remote_set_permissions (struct target_ops *self);
195 static int remote_get_trace_status (struct target_ops *self,
196 struct trace_status *ts);
198 static int remote_upload_tracepoints (struct target_ops *self,
199 struct uploaded_tp **utpp);
201 static int remote_upload_trace_state_variables (struct target_ops *self,
202 struct uploaded_tsv **utsvp);
204 static void remote_query_supported (void);
206 static void remote_check_symbols (void);
208 void _initialize_remote (void);
211 static void stop_reply_xfree (struct stop_reply *);
212 static void remote_parse_stop_reply (char *, struct stop_reply *);
213 static void push_stop_reply (struct stop_reply *);
214 static void discard_pending_stop_replies_in_queue (struct remote_state *);
215 static int peek_stop_reply (ptid_t ptid);
217 struct threads_listing_context;
218 static void remove_new_fork_children (struct threads_listing_context *);
220 static void remote_async_inferior_event_handler (gdb_client_data);
222 static void remote_terminal_ours (struct target_ops *self);
224 static int remote_read_description_p (struct target_ops *target);
226 static void remote_console_output (char *msg);
228 static int remote_supports_cond_breakpoints (struct target_ops *self);
230 static int remote_can_run_breakpoint_commands (struct target_ops *self);
232 static void remote_btrace_reset (void);
234 static int stop_reply_queue_length (void);
236 static void readahead_cache_invalidate (void);
238 static void remote_unpush_and_throw (void);
242 static struct cmd_list_element *remote_cmdlist;
244 /* For "set remote" and "show remote". */
246 static struct cmd_list_element *remote_set_cmdlist;
247 static struct cmd_list_element *remote_show_cmdlist;
249 /* Stub vCont actions support.
251 Each field is a boolean flag indicating whether the stub reports
252 support for the corresponding action. */
254 struct vCont_action_support
269 /* Controls whether GDB is willing to use range stepping. */
271 static int use_range_stepping = 1;
273 #define OPAQUETHREADBYTES 8
275 /* a 64 bit opaque identifier */
276 typedef unsigned char threadref[OPAQUETHREADBYTES];
278 /* About this many threadisds fit in a packet. */
280 #define MAXTHREADLISTRESULTS 32
282 /* Data for the vFile:pread readahead cache. */
284 struct readahead_cache
286 /* The file descriptor for the file that is being cached. -1 if the
290 /* The offset into the file that the cache buffer corresponds
294 /* The buffer holding the cache contents. */
296 /* The buffer's size. We try to read as much as fits into a packet
300 /* Cache hit and miss counters. */
305 /* Description of the remote protocol state for the currently
306 connected target. This is per-target state, and independent of the
307 selected architecture. */
311 /* A buffer to use for incoming packets, and its current size. The
312 buffer is grown dynamically for larger incoming packets.
313 Outgoing packets may also be constructed in this buffer.
314 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
315 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
320 /* True if we're going through initial connection setup (finding out
321 about the remote side's threads, relocating symbols, etc.). */
324 /* If we negotiated packet size explicitly (and thus can bypass
325 heuristics for the largest packet size that will not overflow
326 a buffer in the stub), this will be set to that packet size.
327 Otherwise zero, meaning to use the guessed size. */
328 long explicit_packet_size;
330 /* remote_wait is normally called when the target is running and
331 waits for a stop reply packet. But sometimes we need to call it
332 when the target is already stopped. We can send a "?" packet
333 and have remote_wait read the response. Or, if we already have
334 the response, we can stash it in BUF and tell remote_wait to
335 skip calling getpkt. This flag is set when BUF contains a
336 stop reply packet and the target is not waiting. */
337 int cached_wait_status;
339 /* True, if in no ack mode. That is, neither GDB nor the stub will
340 expect acks from each other. The connection is assumed to be
344 /* True if we're connected in extended remote mode. */
347 /* True if we resumed the target and we're waiting for the target to
348 stop. In the mean time, we can't start another command/query.
349 The remote server wouldn't be ready to process it, so we'd
350 timeout waiting for a reply that would never come and eventually
351 we'd close the connection. This can happen in asynchronous mode
352 because we allow GDB commands while the target is running. */
353 int waiting_for_stop_reply;
355 /* The status of the stub support for the various vCont actions. */
356 struct vCont_action_support supports_vCont;
358 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
359 responded to that. */
362 /* True if we saw a Ctrl-C while reading or writing from/to the
363 remote descriptor. At that point it is not safe to send a remote
364 interrupt packet, so we instead remember we saw the Ctrl-C and
365 process it once we're done with sending/receiving the current
366 packet, which should be shortly. If however that takes too long,
367 and the user presses Ctrl-C again, we offer to disconnect. */
368 int got_ctrlc_during_io;
370 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
371 remote_open knows that we don't have a file open when the program
373 struct serial *remote_desc;
375 /* These are the threads which we last sent to the remote system. The
376 TID member will be -1 for all or -2 for not sent yet. */
377 ptid_t general_thread;
378 ptid_t continue_thread;
380 /* This is the traceframe which we last selected on the remote system.
381 It will be -1 if no traceframe is selected. */
382 int remote_traceframe_number;
384 char *last_pass_packet;
386 /* The last QProgramSignals packet sent to the target. We bypass
387 sending a new program signals list down to the target if the new
388 packet is exactly the same as the last we sent. IOW, we only let
389 the target know about program signals list changes. */
390 char *last_program_signals_packet;
392 enum gdb_signal last_sent_signal;
396 /* The execution direction of the last resume we got. */
397 enum exec_direction_kind last_resume_exec_dir;
399 char *finished_object;
400 char *finished_annex;
401 ULONGEST finished_offset;
403 /* Should we try the 'ThreadInfo' query packet?
405 This variable (NOT available to the user: auto-detect only!)
406 determines whether GDB will use the new, simpler "ThreadInfo"
407 query or the older, more complex syntax for thread queries.
408 This is an auto-detect variable (set to true at each connect,
409 and set to false when the target fails to recognize it). */
410 int use_threadinfo_query;
411 int use_threadextra_query;
413 threadref echo_nextthread;
414 threadref nextthread;
415 threadref resultthreadlist[MAXTHREADLISTRESULTS];
417 /* The state of remote notification. */
418 struct remote_notif_state *notif_state;
420 /* The branch trace configuration. */
421 struct btrace_config btrace_config;
423 /* The argument to the last "vFile:setfs:" packet we sent, used
424 to avoid sending repeated unnecessary "vFile:setfs:" packets.
425 Initialized to -1 to indicate that no "vFile:setfs:" packet
426 has yet been sent. */
429 /* A readahead cache for vFile:pread. Often, reading a binary
430 involves a sequence of small reads. E.g., when parsing an ELF
431 file. A readahead cache helps mostly the case of remote
432 debugging on a connection with higher latency, due to the
433 request/reply nature of the RSP. We only cache data for a single
434 file descriptor at a time. */
435 struct readahead_cache readahead_cache;
438 /* Private data that we'll store in (struct thread_info)->private. */
439 struct private_thread_info
445 /* Whether the target stopped for a breakpoint/watchpoint. */
446 enum target_stop_reason stop_reason;
448 /* This is set to the data address of the access causing the target
449 to stop for a watchpoint. */
450 CORE_ADDR watch_data_address;
454 free_private_thread_info (struct private_thread_info *info)
461 /* This data could be associated with a target, but we do not always
462 have access to the current target when we need it, so for now it is
463 static. This will be fine for as long as only one target is in use
465 static struct remote_state *remote_state;
467 static struct remote_state *
468 get_remote_state_raw (void)
473 /* Allocate a new struct remote_state with xmalloc, initialize it, and
476 static struct remote_state *
477 new_remote_state (void)
479 struct remote_state *result = XCNEW (struct remote_state);
481 /* The default buffer size is unimportant; it will be expanded
482 whenever a larger buffer is needed. */
483 result->buf_size = 400;
484 result->buf = (char *) xmalloc (result->buf_size);
485 result->remote_traceframe_number = -1;
486 result->last_sent_signal = GDB_SIGNAL_0;
487 result->last_resume_exec_dir = EXEC_FORWARD;
493 /* Description of the remote protocol for a given architecture. */
497 long offset; /* Offset into G packet. */
498 long regnum; /* GDB's internal register number. */
499 LONGEST pnum; /* Remote protocol register number. */
500 int in_g_packet; /* Always part of G packet. */
501 /* long size in bytes; == register_size (target_gdbarch (), regnum);
503 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
507 struct remote_arch_state
509 /* Description of the remote protocol registers. */
510 long sizeof_g_packet;
512 /* Description of the remote protocol registers indexed by REGNUM
513 (making an array gdbarch_num_regs in size). */
514 struct packet_reg *regs;
516 /* This is the size (in chars) of the first response to the ``g''
517 packet. It is used as a heuristic when determining the maximum
518 size of memory-read and memory-write packets. A target will
519 typically only reserve a buffer large enough to hold the ``g''
520 packet. The size does not include packet overhead (headers and
522 long actual_register_packet_size;
524 /* This is the maximum size (in chars) of a non read/write packet.
525 It is also used as a cap on the size of read/write packets. */
526 long remote_packet_size;
529 /* Utility: generate error from an incoming stub packet. */
531 trace_error (char *buf)
534 return; /* not an error msg */
537 case '1': /* malformed packet error */
538 if (*++buf == '0') /* general case: */
539 error (_("remote.c: error in outgoing packet."));
541 error (_("remote.c: error in outgoing packet at field #%ld."),
542 strtol (buf, NULL, 16));
544 error (_("Target returns error code '%s'."), buf);
548 /* Utility: wait for reply from stub, while accepting "O" packets. */
550 remote_get_noisy_reply (char **buf_p,
553 do /* Loop on reply from remote stub. */
557 QUIT; /* Allow user to bail out with ^C. */
558 getpkt (buf_p, sizeof_buf, 0);
562 else if (startswith (buf, "qRelocInsn:"))
565 CORE_ADDR from, to, org_to;
567 int adjusted_size = 0;
570 p = buf + strlen ("qRelocInsn:");
571 pp = unpack_varlen_hex (p, &ul);
573 error (_("invalid qRelocInsn packet: %s"), buf);
577 unpack_varlen_hex (p, &ul);
584 gdbarch_relocate_instruction (target_gdbarch (), &to, from);
587 CATCH (ex, RETURN_MASK_ALL)
589 if (ex.error == MEMORY_ERROR)
591 /* Propagate memory errors silently back to the
592 target. The stub may have limited the range of
593 addresses we can write to, for example. */
597 /* Something unexpectedly bad happened. Be verbose
598 so we can tell what, and propagate the error back
599 to the stub, so it doesn't get stuck waiting for
601 exception_fprintf (gdb_stderr, ex,
602 _("warning: relocating instruction: "));
610 adjusted_size = to - org_to;
612 xsnprintf (buf, *sizeof_buf, "qRelocInsn:%x", adjusted_size);
616 else if (buf[0] == 'O' && buf[1] != 'K')
617 remote_console_output (buf + 1); /* 'O' message from stub */
619 return buf; /* Here's the actual reply. */
624 /* Handle for retreving the remote protocol data from gdbarch. */
625 static struct gdbarch_data *remote_gdbarch_data_handle;
627 static struct remote_arch_state *
628 get_remote_arch_state (void)
630 gdb_assert (target_gdbarch () != NULL);
631 return ((struct remote_arch_state *)
632 gdbarch_data (target_gdbarch (), remote_gdbarch_data_handle));
635 /* Fetch the global remote target state. */
637 static struct remote_state *
638 get_remote_state (void)
640 /* Make sure that the remote architecture state has been
641 initialized, because doing so might reallocate rs->buf. Any
642 function which calls getpkt also needs to be mindful of changes
643 to rs->buf, but this call limits the number of places which run
645 get_remote_arch_state ();
647 return get_remote_state_raw ();
650 /* Cleanup routine for the remote module's pspace data. */
653 remote_pspace_data_cleanup (struct program_space *pspace, void *arg)
655 char *remote_exec_file = (char *) arg;
657 xfree (remote_exec_file);
660 /* Fetch the remote exec-file from the current program space. */
663 get_remote_exec_file (void)
665 char *remote_exec_file;
668 = (char *) program_space_data (current_program_space,
670 if (remote_exec_file == NULL)
673 return remote_exec_file;
676 /* Set the remote exec file for PSPACE. */
679 set_pspace_remote_exec_file (struct program_space *pspace,
680 char *remote_exec_file)
682 char *old_file = (char *) program_space_data (pspace, remote_pspace_data);
685 set_program_space_data (pspace, remote_pspace_data,
686 xstrdup (remote_exec_file));
689 /* The "set/show remote exec-file" set command hook. */
692 set_remote_exec_file (char *ignored, int from_tty,
693 struct cmd_list_element *c)
695 gdb_assert (remote_exec_file_var != NULL);
696 set_pspace_remote_exec_file (current_program_space, remote_exec_file_var);
699 /* The "set/show remote exec-file" show command hook. */
702 show_remote_exec_file (struct ui_file *file, int from_tty,
703 struct cmd_list_element *cmd, const char *value)
705 fprintf_filtered (file, "%s\n", remote_exec_file_var);
709 compare_pnums (const void *lhs_, const void *rhs_)
711 const struct packet_reg * const *lhs
712 = (const struct packet_reg * const *) lhs_;
713 const struct packet_reg * const *rhs
714 = (const struct packet_reg * const *) rhs_;
716 if ((*lhs)->pnum < (*rhs)->pnum)
718 else if ((*lhs)->pnum == (*rhs)->pnum)
725 map_regcache_remote_table (struct gdbarch *gdbarch, struct packet_reg *regs)
727 int regnum, num_remote_regs, offset;
728 struct packet_reg **remote_regs;
730 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
732 struct packet_reg *r = ®s[regnum];
734 if (register_size (gdbarch, regnum) == 0)
735 /* Do not try to fetch zero-sized (placeholder) registers. */
738 r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
743 /* Define the g/G packet format as the contents of each register
744 with a remote protocol number, in order of ascending protocol
747 remote_regs = XALLOCAVEC (struct packet_reg *, gdbarch_num_regs (gdbarch));
748 for (num_remote_regs = 0, regnum = 0;
749 regnum < gdbarch_num_regs (gdbarch);
751 if (regs[regnum].pnum != -1)
752 remote_regs[num_remote_regs++] = ®s[regnum];
754 qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
757 for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
759 remote_regs[regnum]->in_g_packet = 1;
760 remote_regs[regnum]->offset = offset;
761 offset += register_size (gdbarch, remote_regs[regnum]->regnum);
767 /* Given the architecture described by GDBARCH, return the remote
768 protocol register's number and the register's offset in the g/G
769 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
770 If the target does not have a mapping for REGNUM, return false,
771 otherwise, return true. */
774 remote_register_number_and_offset (struct gdbarch *gdbarch, int regnum,
775 int *pnum, int *poffset)
777 struct packet_reg *regs;
778 struct cleanup *old_chain;
780 gdb_assert (regnum < gdbarch_num_regs (gdbarch));
782 regs = XCNEWVEC (struct packet_reg, gdbarch_num_regs (gdbarch));
783 old_chain = make_cleanup (xfree, regs);
785 map_regcache_remote_table (gdbarch, regs);
787 *pnum = regs[regnum].pnum;
788 *poffset = regs[regnum].offset;
790 do_cleanups (old_chain);
796 init_remote_state (struct gdbarch *gdbarch)
798 struct remote_state *rs = get_remote_state_raw ();
799 struct remote_arch_state *rsa;
801 rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state);
803 /* Use the architecture to build a regnum<->pnum table, which will be
804 1:1 unless a feature set specifies otherwise. */
805 rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch,
806 gdbarch_num_regs (gdbarch),
809 /* Record the maximum possible size of the g packet - it may turn out
811 rsa->sizeof_g_packet = map_regcache_remote_table (gdbarch, rsa->regs);
813 /* Default maximum number of characters in a packet body. Many
814 remote stubs have a hardwired buffer size of 400 bytes
815 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
816 as the maximum packet-size to ensure that the packet and an extra
817 NUL character can always fit in the buffer. This stops GDB
818 trashing stubs that try to squeeze an extra NUL into what is
819 already a full buffer (As of 1999-12-04 that was most stubs). */
820 rsa->remote_packet_size = 400 - 1;
822 /* This one is filled in when a ``g'' packet is received. */
823 rsa->actual_register_packet_size = 0;
825 /* Should rsa->sizeof_g_packet needs more space than the
826 default, adjust the size accordingly. Remember that each byte is
827 encoded as two characters. 32 is the overhead for the packet
828 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
829 (``$NN:G...#NN'') is a better guess, the below has been padded a
831 if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2))
832 rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32);
834 /* Make sure that the packet buffer is plenty big enough for
835 this architecture. */
836 if (rs->buf_size < rsa->remote_packet_size)
838 rs->buf_size = 2 * rsa->remote_packet_size;
839 rs->buf = (char *) xrealloc (rs->buf, rs->buf_size);
845 /* Return the current allowed size of a remote packet. This is
846 inferred from the current architecture, and should be used to
847 limit the length of outgoing packets. */
849 get_remote_packet_size (void)
851 struct remote_state *rs = get_remote_state ();
852 struct remote_arch_state *rsa = get_remote_arch_state ();
854 if (rs->explicit_packet_size)
855 return rs->explicit_packet_size;
857 return rsa->remote_packet_size;
860 static struct packet_reg *
861 packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
863 if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch ()))
867 struct packet_reg *r = &rsa->regs[regnum];
869 gdb_assert (r->regnum == regnum);
874 static struct packet_reg *
875 packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
879 for (i = 0; i < gdbarch_num_regs (target_gdbarch ()); i++)
881 struct packet_reg *r = &rsa->regs[i];
889 static struct target_ops remote_ops;
891 static struct target_ops extended_remote_ops;
893 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
894 ``forever'' still use the normal timeout mechanism. This is
895 currently used by the ASYNC code to guarentee that target reads
896 during the initial connect always time-out. Once getpkt has been
897 modified to return a timeout indication and, in turn
898 remote_wait()/wait_for_inferior() have gained a timeout parameter
900 static int wait_forever_enabled_p = 1;
902 /* Allow the user to specify what sequence to send to the remote
903 when he requests a program interruption: Although ^C is usually
904 what remote systems expect (this is the default, here), it is
905 sometimes preferable to send a break. On other systems such
906 as the Linux kernel, a break followed by g, which is Magic SysRq g
907 is required in order to interrupt the execution. */
908 const char interrupt_sequence_control_c[] = "Ctrl-C";
909 const char interrupt_sequence_break[] = "BREAK";
910 const char interrupt_sequence_break_g[] = "BREAK-g";
911 static const char *const interrupt_sequence_modes[] =
913 interrupt_sequence_control_c,
914 interrupt_sequence_break,
915 interrupt_sequence_break_g,
918 static const char *interrupt_sequence_mode = interrupt_sequence_control_c;
921 show_interrupt_sequence (struct ui_file *file, int from_tty,
922 struct cmd_list_element *c,
925 if (interrupt_sequence_mode == interrupt_sequence_control_c)
926 fprintf_filtered (file,
927 _("Send the ASCII ETX character (Ctrl-c) "
928 "to the remote target to interrupt the "
929 "execution of the program.\n"));
930 else if (interrupt_sequence_mode == interrupt_sequence_break)
931 fprintf_filtered (file,
932 _("send a break signal to the remote target "
933 "to interrupt the execution of the program.\n"));
934 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
935 fprintf_filtered (file,
936 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
937 "the remote target to interrupt the execution "
938 "of Linux kernel.\n"));
940 internal_error (__FILE__, __LINE__,
941 _("Invalid value for interrupt_sequence_mode: %s."),
942 interrupt_sequence_mode);
945 /* This boolean variable specifies whether interrupt_sequence is sent
946 to the remote target when gdb connects to it.
947 This is mostly needed when you debug the Linux kernel: The Linux kernel
948 expects BREAK g which is Magic SysRq g for connecting gdb. */
949 static int interrupt_on_connect = 0;
951 /* This variable is used to implement the "set/show remotebreak" commands.
952 Since these commands are now deprecated in favor of "set/show remote
953 interrupt-sequence", it no longer has any effect on the code. */
954 static int remote_break;
957 set_remotebreak (char *args, int from_tty, struct cmd_list_element *c)
960 interrupt_sequence_mode = interrupt_sequence_break;
962 interrupt_sequence_mode = interrupt_sequence_control_c;
966 show_remotebreak (struct ui_file *file, int from_tty,
967 struct cmd_list_element *c,
972 /* This variable sets the number of bits in an address that are to be
973 sent in a memory ("M" or "m") packet. Normally, after stripping
974 leading zeros, the entire address would be sent. This variable
975 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
976 initial implementation of remote.c restricted the address sent in
977 memory packets to ``host::sizeof long'' bytes - (typically 32
978 bits). Consequently, for 64 bit targets, the upper 32 bits of an
979 address was never sent. Since fixing this bug may cause a break in
980 some remote targets this variable is principly provided to
981 facilitate backward compatibility. */
983 static unsigned int remote_address_size;
985 /* Temporary to track who currently owns the terminal. See
986 remote_terminal_* for more details. */
988 static int remote_async_terminal_ours_p;
991 /* User configurable variables for the number of characters in a
992 memory read/write packet. MIN (rsa->remote_packet_size,
993 rsa->sizeof_g_packet) is the default. Some targets need smaller
994 values (fifo overruns, et.al.) and some users need larger values
995 (speed up transfers). The variables ``preferred_*'' (the user
996 request), ``current_*'' (what was actually set) and ``forced_*''
997 (Positive - a soft limit, negative - a hard limit). */
999 struct memory_packet_config
1006 /* The default max memory-write-packet-size. The 16k is historical.
1007 (It came from older GDB's using alloca for buffers and the
1008 knowledge (folklore?) that some hosts don't cope very well with
1009 large alloca calls.) */
1010 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1012 /* The minimum remote packet size for memory transfers. Ensures we
1013 can write at least one byte. */
1014 #define MIN_MEMORY_PACKET_SIZE 20
1016 /* Compute the current size of a read/write packet. Since this makes
1017 use of ``actual_register_packet_size'' the computation is dynamic. */
1020 get_memory_packet_size (struct memory_packet_config *config)
1022 struct remote_state *rs = get_remote_state ();
1023 struct remote_arch_state *rsa = get_remote_arch_state ();
1026 if (config->fixed_p)
1028 if (config->size <= 0)
1029 what_they_get = DEFAULT_MAX_MEMORY_PACKET_SIZE;
1031 what_they_get = config->size;
1035 what_they_get = get_remote_packet_size ();
1036 /* Limit the packet to the size specified by the user. */
1037 if (config->size > 0
1038 && what_they_get > config->size)
1039 what_they_get = config->size;
1041 /* Limit it to the size of the targets ``g'' response unless we have
1042 permission from the stub to use a larger packet size. */
1043 if (rs->explicit_packet_size == 0
1044 && rsa->actual_register_packet_size > 0
1045 && what_they_get > rsa->actual_register_packet_size)
1046 what_they_get = rsa->actual_register_packet_size;
1048 if (what_they_get < MIN_MEMORY_PACKET_SIZE)
1049 what_they_get = MIN_MEMORY_PACKET_SIZE;
1051 /* Make sure there is room in the global buffer for this packet
1052 (including its trailing NUL byte). */
1053 if (rs->buf_size < what_they_get + 1)
1055 rs->buf_size = 2 * what_they_get;
1056 rs->buf = (char *) xrealloc (rs->buf, 2 * what_they_get);
1059 return what_they_get;
1062 /* Update the size of a read/write packet. If they user wants
1063 something really big then do a sanity check. */
1066 set_memory_packet_size (char *args, struct memory_packet_config *config)
1068 int fixed_p = config->fixed_p;
1069 long size = config->size;
1072 error (_("Argument required (integer, `fixed' or `limited')."));
1073 else if (strcmp (args, "hard") == 0
1074 || strcmp (args, "fixed") == 0)
1076 else if (strcmp (args, "soft") == 0
1077 || strcmp (args, "limit") == 0)
1083 size = strtoul (args, &end, 0);
1085 error (_("Invalid %s (bad syntax)."), config->name);
1087 /* Instead of explicitly capping the size of a packet to or
1088 disallowing it, the user is allowed to set the size to
1089 something arbitrarily large. */
1092 /* So that the query shows the correct value. */
1094 size = DEFAULT_MAX_MEMORY_PACKET_SIZE;
1097 if (fixed_p && !config->fixed_p)
1099 if (! query (_("The target may not be able to correctly handle a %s\n"
1100 "of %ld bytes. Change the packet size? "),
1101 config->name, size))
1102 error (_("Packet size not changed."));
1104 /* Update the config. */
1105 config->fixed_p = fixed_p;
1106 config->size = size;
1110 show_memory_packet_size (struct memory_packet_config *config)
1112 printf_filtered (_("The %s is %ld. "), config->name, config->size);
1113 if (config->fixed_p)
1114 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1115 get_memory_packet_size (config));
1117 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1118 get_memory_packet_size (config));
1121 static struct memory_packet_config memory_write_packet_config =
1123 "memory-write-packet-size",
1127 set_memory_write_packet_size (char *args, int from_tty)
1129 set_memory_packet_size (args, &memory_write_packet_config);
1133 show_memory_write_packet_size (char *args, int from_tty)
1135 show_memory_packet_size (&memory_write_packet_config);
1139 get_memory_write_packet_size (void)
1141 return get_memory_packet_size (&memory_write_packet_config);
1144 static struct memory_packet_config memory_read_packet_config =
1146 "memory-read-packet-size",
1150 set_memory_read_packet_size (char *args, int from_tty)
1152 set_memory_packet_size (args, &memory_read_packet_config);
1156 show_memory_read_packet_size (char *args, int from_tty)
1158 show_memory_packet_size (&memory_read_packet_config);
1162 get_memory_read_packet_size (void)
1164 long size = get_memory_packet_size (&memory_read_packet_config);
1166 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1167 extra buffer size argument before the memory read size can be
1168 increased beyond this. */
1169 if (size > get_remote_packet_size ())
1170 size = get_remote_packet_size ();
1175 /* Generic configuration support for packets the stub optionally
1176 supports. Allows the user to specify the use of the packet as well
1177 as allowing GDB to auto-detect support in the remote stub. */
1181 PACKET_SUPPORT_UNKNOWN = 0,
1186 struct packet_config
1191 /* If auto, GDB auto-detects support for this packet or feature,
1192 either through qSupported, or by trying the packet and looking
1193 at the response. If true, GDB assumes the target supports this
1194 packet. If false, the packet is disabled. Configs that don't
1195 have an associated command always have this set to auto. */
1196 enum auto_boolean detect;
1198 /* Does the target support this packet? */
1199 enum packet_support support;
1202 /* Analyze a packet's return value and update the packet config
1212 static enum packet_support packet_config_support (struct packet_config *config);
1213 static enum packet_support packet_support (int packet);
1216 show_packet_config_cmd (struct packet_config *config)
1218 char *support = "internal-error";
1220 switch (packet_config_support (config))
1223 support = "enabled";
1225 case PACKET_DISABLE:
1226 support = "disabled";
1228 case PACKET_SUPPORT_UNKNOWN:
1229 support = "unknown";
1232 switch (config->detect)
1234 case AUTO_BOOLEAN_AUTO:
1235 printf_filtered (_("Support for the `%s' packet "
1236 "is auto-detected, currently %s.\n"),
1237 config->name, support);
1239 case AUTO_BOOLEAN_TRUE:
1240 case AUTO_BOOLEAN_FALSE:
1241 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1242 config->name, support);
1248 add_packet_config_cmd (struct packet_config *config, const char *name,
1249 const char *title, int legacy)
1255 config->name = name;
1256 config->title = title;
1257 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1259 show_doc = xstrprintf ("Show current use of remote "
1260 "protocol `%s' (%s) packet",
1262 /* set/show TITLE-packet {auto,on,off} */
1263 cmd_name = xstrprintf ("%s-packet", title);
1264 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
1265 &config->detect, set_doc,
1266 show_doc, NULL, /* help_doc */
1268 show_remote_protocol_packet_cmd,
1269 &remote_set_cmdlist, &remote_show_cmdlist);
1270 /* The command code copies the documentation strings. */
1273 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1278 legacy_name = xstrprintf ("%s-packet", name);
1279 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1280 &remote_set_cmdlist);
1281 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1282 &remote_show_cmdlist);
1286 static enum packet_result
1287 packet_check_result (const char *buf)
1291 /* The stub recognized the packet request. Check that the
1292 operation succeeded. */
1294 && isxdigit (buf[1]) && isxdigit (buf[2])
1296 /* "Enn" - definitly an error. */
1297 return PACKET_ERROR;
1299 /* Always treat "E." as an error. This will be used for
1300 more verbose error messages, such as E.memtypes. */
1301 if (buf[0] == 'E' && buf[1] == '.')
1302 return PACKET_ERROR;
1304 /* The packet may or may not be OK. Just assume it is. */
1308 /* The stub does not support the packet. */
1309 return PACKET_UNKNOWN;
1312 static enum packet_result
1313 packet_ok (const char *buf, struct packet_config *config)
1315 enum packet_result result;
1317 if (config->detect != AUTO_BOOLEAN_TRUE
1318 && config->support == PACKET_DISABLE)
1319 internal_error (__FILE__, __LINE__,
1320 _("packet_ok: attempt to use a disabled packet"));
1322 result = packet_check_result (buf);
1327 /* The stub recognized the packet request. */
1328 if (config->support == PACKET_SUPPORT_UNKNOWN)
1331 fprintf_unfiltered (gdb_stdlog,
1332 "Packet %s (%s) is supported\n",
1333 config->name, config->title);
1334 config->support = PACKET_ENABLE;
1337 case PACKET_UNKNOWN:
1338 /* The stub does not support the packet. */
1339 if (config->detect == AUTO_BOOLEAN_AUTO
1340 && config->support == PACKET_ENABLE)
1342 /* If the stub previously indicated that the packet was
1343 supported then there is a protocol error. */
1344 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1345 config->name, config->title);
1347 else if (config->detect == AUTO_BOOLEAN_TRUE)
1349 /* The user set it wrong. */
1350 error (_("Enabled packet %s (%s) not recognized by stub"),
1351 config->name, config->title);
1355 fprintf_unfiltered (gdb_stdlog,
1356 "Packet %s (%s) is NOT supported\n",
1357 config->name, config->title);
1358 config->support = PACKET_DISABLE;
1379 PACKET_vFile_pwrite,
1381 PACKET_vFile_unlink,
1382 PACKET_vFile_readlink,
1385 PACKET_qXfer_features,
1386 PACKET_qXfer_exec_file,
1387 PACKET_qXfer_libraries,
1388 PACKET_qXfer_libraries_svr4,
1389 PACKET_qXfer_memory_map,
1390 PACKET_qXfer_spu_read,
1391 PACKET_qXfer_spu_write,
1392 PACKET_qXfer_osdata,
1393 PACKET_qXfer_threads,
1394 PACKET_qXfer_statictrace_read,
1395 PACKET_qXfer_traceframe_info,
1401 PACKET_QPassSignals,
1402 PACKET_QCatchSyscalls,
1403 PACKET_QProgramSignals,
1405 PACKET_qSearch_memory,
1408 PACKET_QStartNoAckMode,
1410 PACKET_qXfer_siginfo_read,
1411 PACKET_qXfer_siginfo_write,
1414 /* Support for conditional tracepoints. */
1415 PACKET_ConditionalTracepoints,
1417 /* Support for target-side breakpoint conditions. */
1418 PACKET_ConditionalBreakpoints,
1420 /* Support for target-side breakpoint commands. */
1421 PACKET_BreakpointCommands,
1423 /* Support for fast tracepoints. */
1424 PACKET_FastTracepoints,
1426 /* Support for static tracepoints. */
1427 PACKET_StaticTracepoints,
1429 /* Support for installing tracepoints while a trace experiment is
1431 PACKET_InstallInTrace,
1435 PACKET_TracepointSource,
1438 PACKET_QDisableRandomization,
1440 PACKET_QTBuffer_size,
1444 PACKET_qXfer_btrace,
1446 /* Support for the QNonStop packet. */
1449 /* Support for the QThreadEvents packet. */
1450 PACKET_QThreadEvents,
1452 /* Support for multi-process extensions. */
1453 PACKET_multiprocess_feature,
1455 /* Support for enabling and disabling tracepoints while a trace
1456 experiment is running. */
1457 PACKET_EnableDisableTracepoints_feature,
1459 /* Support for collecting strings using the tracenz bytecode. */
1460 PACKET_tracenz_feature,
1462 /* Support for continuing to run a trace experiment while GDB is
1464 PACKET_DisconnectedTracing_feature,
1466 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1467 PACKET_augmented_libraries_svr4_read_feature,
1469 /* Support for the qXfer:btrace-conf:read packet. */
1470 PACKET_qXfer_btrace_conf,
1472 /* Support for the Qbtrace-conf:bts:size packet. */
1473 PACKET_Qbtrace_conf_bts_size,
1475 /* Support for swbreak+ feature. */
1476 PACKET_swbreak_feature,
1478 /* Support for hwbreak+ feature. */
1479 PACKET_hwbreak_feature,
1481 /* Support for fork events. */
1482 PACKET_fork_event_feature,
1484 /* Support for vfork events. */
1485 PACKET_vfork_event_feature,
1487 /* Support for the Qbtrace-conf:pt:size packet. */
1488 PACKET_Qbtrace_conf_pt_size,
1490 /* Support for exec events. */
1491 PACKET_exec_event_feature,
1493 /* Support for query supported vCont actions. */
1494 PACKET_vContSupported,
1496 /* Support remote CTRL-C. */
1499 /* Support TARGET_WAITKIND_NO_RESUMED. */
1505 static struct packet_config remote_protocol_packets[PACKET_MAX];
1507 /* Returns the packet's corresponding "set remote foo-packet" command
1508 state. See struct packet_config for more details. */
1510 static enum auto_boolean
1511 packet_set_cmd_state (int packet)
1513 return remote_protocol_packets[packet].detect;
1516 /* Returns whether a given packet or feature is supported. This takes
1517 into account the state of the corresponding "set remote foo-packet"
1518 command, which may be used to bypass auto-detection. */
1520 static enum packet_support
1521 packet_config_support (struct packet_config *config)
1523 switch (config->detect)
1525 case AUTO_BOOLEAN_TRUE:
1526 return PACKET_ENABLE;
1527 case AUTO_BOOLEAN_FALSE:
1528 return PACKET_DISABLE;
1529 case AUTO_BOOLEAN_AUTO:
1530 return config->support;
1532 gdb_assert_not_reached (_("bad switch"));
1536 /* Same as packet_config_support, but takes the packet's enum value as
1539 static enum packet_support
1540 packet_support (int packet)
1542 struct packet_config *config = &remote_protocol_packets[packet];
1544 return packet_config_support (config);
1548 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
1549 struct cmd_list_element *c,
1552 struct packet_config *packet;
1554 for (packet = remote_protocol_packets;
1555 packet < &remote_protocol_packets[PACKET_MAX];
1558 if (&packet->detect == c->var)
1560 show_packet_config_cmd (packet);
1564 internal_error (__FILE__, __LINE__, _("Could not find config for %s"),
1568 /* Should we try one of the 'Z' requests? */
1572 Z_PACKET_SOFTWARE_BP,
1573 Z_PACKET_HARDWARE_BP,
1580 /* For compatibility with older distributions. Provide a ``set remote
1581 Z-packet ...'' command that updates all the Z packet types. */
1583 static enum auto_boolean remote_Z_packet_detect;
1586 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
1587 struct cmd_list_element *c)
1591 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1592 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
1596 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
1597 struct cmd_list_element *c,
1602 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1604 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
1608 /* Returns true if the multi-process extensions are in effect. */
1611 remote_multi_process_p (struct remote_state *rs)
1613 return packet_support (PACKET_multiprocess_feature) == PACKET_ENABLE;
1616 /* Returns true if fork events are supported. */
1619 remote_fork_event_p (struct remote_state *rs)
1621 return packet_support (PACKET_fork_event_feature) == PACKET_ENABLE;
1624 /* Returns true if vfork events are supported. */
1627 remote_vfork_event_p (struct remote_state *rs)
1629 return packet_support (PACKET_vfork_event_feature) == PACKET_ENABLE;
1632 /* Returns true if exec events are supported. */
1635 remote_exec_event_p (struct remote_state *rs)
1637 return packet_support (PACKET_exec_event_feature) == PACKET_ENABLE;
1640 /* Insert fork catchpoint target routine. If fork events are enabled
1641 then return success, nothing more to do. */
1644 remote_insert_fork_catchpoint (struct target_ops *ops, int pid)
1646 struct remote_state *rs = get_remote_state ();
1648 return !remote_fork_event_p (rs);
1651 /* Remove fork catchpoint target routine. Nothing to do, just
1655 remote_remove_fork_catchpoint (struct target_ops *ops, int pid)
1660 /* Insert vfork catchpoint target routine. If vfork events are enabled
1661 then return success, nothing more to do. */
1664 remote_insert_vfork_catchpoint (struct target_ops *ops, int pid)
1666 struct remote_state *rs = get_remote_state ();
1668 return !remote_vfork_event_p (rs);
1671 /* Remove vfork catchpoint target routine. Nothing to do, just
1675 remote_remove_vfork_catchpoint (struct target_ops *ops, int pid)
1680 /* Insert exec catchpoint target routine. If exec events are
1681 enabled, just return success. */
1684 remote_insert_exec_catchpoint (struct target_ops *ops, int pid)
1686 struct remote_state *rs = get_remote_state ();
1688 return !remote_exec_event_p (rs);
1691 /* Remove exec catchpoint target routine. Nothing to do, just
1695 remote_remove_exec_catchpoint (struct target_ops *ops, int pid)
1701 /* Asynchronous signal handle registered as event loop source for
1702 when we have pending events ready to be passed to the core. */
1704 static struct async_event_handler *remote_async_inferior_event_token;
1708 static ptid_t magic_null_ptid;
1709 static ptid_t not_sent_ptid;
1710 static ptid_t any_thread_ptid;
1712 /* Find out if the stub attached to PID (and hence GDB should offer to
1713 detach instead of killing it when bailing out). */
1716 remote_query_attached (int pid)
1718 struct remote_state *rs = get_remote_state ();
1719 size_t size = get_remote_packet_size ();
1721 if (packet_support (PACKET_qAttached) == PACKET_DISABLE)
1724 if (remote_multi_process_p (rs))
1725 xsnprintf (rs->buf, size, "qAttached:%x", pid);
1727 xsnprintf (rs->buf, size, "qAttached");
1730 getpkt (&rs->buf, &rs->buf_size, 0);
1732 switch (packet_ok (rs->buf,
1733 &remote_protocol_packets[PACKET_qAttached]))
1736 if (strcmp (rs->buf, "1") == 0)
1740 warning (_("Remote failure reply: %s"), rs->buf);
1742 case PACKET_UNKNOWN:
1749 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1750 has been invented by GDB, instead of reported by the target. Since
1751 we can be connected to a remote system before before knowing about
1752 any inferior, mark the target with execution when we find the first
1753 inferior. If ATTACHED is 1, then we had just attached to this
1754 inferior. If it is 0, then we just created this inferior. If it
1755 is -1, then try querying the remote stub to find out if it had
1756 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1757 attempt to open this inferior's executable as the main executable
1758 if no main executable is open already. */
1760 static struct inferior *
1761 remote_add_inferior (int fake_pid_p, int pid, int attached,
1764 struct inferior *inf;
1766 /* Check whether this process we're learning about is to be
1767 considered attached, or if is to be considered to have been
1768 spawned by the stub. */
1770 attached = remote_query_attached (pid);
1772 if (gdbarch_has_global_solist (target_gdbarch ()))
1774 /* If the target shares code across all inferiors, then every
1775 attach adds a new inferior. */
1776 inf = add_inferior (pid);
1778 /* ... and every inferior is bound to the same program space.
1779 However, each inferior may still have its own address
1781 inf->aspace = maybe_new_address_space ();
1782 inf->pspace = current_program_space;
1786 /* In the traditional debugging scenario, there's a 1-1 match
1787 between program/address spaces. We simply bind the inferior
1788 to the program space's address space. */
1789 inf = current_inferior ();
1790 inferior_appeared (inf, pid);
1793 inf->attach_flag = attached;
1794 inf->fake_pid_p = fake_pid_p;
1796 /* If no main executable is currently open then attempt to
1797 open the file that was executed to create this inferior. */
1798 if (try_open_exec && get_exec_file (0) == NULL)
1799 exec_file_locate_attach (pid, 1);
1804 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1805 according to RUNNING. */
1808 remote_add_thread (ptid_t ptid, int running, int executing)
1810 struct remote_state *rs = get_remote_state ();
1812 /* GDB historically didn't pull threads in the initial connection
1813 setup. If the remote target doesn't even have a concept of
1814 threads (e.g., a bare-metal target), even if internally we
1815 consider that a single-threaded target, mentioning a new thread
1816 might be confusing to the user. Be silent then, preserving the
1817 age old behavior. */
1818 if (rs->starting_up)
1819 add_thread_silent (ptid);
1823 set_executing (ptid, executing);
1824 set_running (ptid, running);
1827 /* Come here when we learn about a thread id from the remote target.
1828 It may be the first time we hear about such thread, so take the
1829 opportunity to add it to GDB's thread list. In case this is the
1830 first time we're noticing its corresponding inferior, add it to
1831 GDB's inferior list as well. EXECUTING indicates whether the
1832 thread is (internally) executing or stopped. */
1835 remote_notice_new_inferior (ptid_t currthread, int executing)
1837 /* In non-stop mode, we assume new found threads are (externally)
1838 running until proven otherwise with a stop reply. In all-stop,
1839 we can only get here if all threads are stopped. */
1840 int running = target_is_non_stop_p () ? 1 : 0;
1842 /* If this is a new thread, add it to GDB's thread list.
1843 If we leave it up to WFI to do this, bad things will happen. */
1845 if (in_thread_list (currthread) && is_exited (currthread))
1847 /* We're seeing an event on a thread id we knew had exited.
1848 This has to be a new thread reusing the old id. Add it. */
1849 remote_add_thread (currthread, running, executing);
1853 if (!in_thread_list (currthread))
1855 struct inferior *inf = NULL;
1856 int pid = ptid_get_pid (currthread);
1858 if (ptid_is_pid (inferior_ptid)
1859 && pid == ptid_get_pid (inferior_ptid))
1861 /* inferior_ptid has no thread member yet. This can happen
1862 with the vAttach -> remote_wait,"TAAthread:" path if the
1863 stub doesn't support qC. This is the first stop reported
1864 after an attach, so this is the main thread. Update the
1865 ptid in the thread list. */
1866 if (in_thread_list (pid_to_ptid (pid)))
1867 thread_change_ptid (inferior_ptid, currthread);
1870 remote_add_thread (currthread, running, executing);
1871 inferior_ptid = currthread;
1876 if (ptid_equal (magic_null_ptid, inferior_ptid))
1878 /* inferior_ptid is not set yet. This can happen with the
1879 vRun -> remote_wait,"TAAthread:" path if the stub
1880 doesn't support qC. This is the first stop reported
1881 after an attach, so this is the main thread. Update the
1882 ptid in the thread list. */
1883 thread_change_ptid (inferior_ptid, currthread);
1887 /* When connecting to a target remote, or to a target
1888 extended-remote which already was debugging an inferior, we
1889 may not know about it yet. Add it before adding its child
1890 thread, so notifications are emitted in a sensible order. */
1891 if (!in_inferior_list (ptid_get_pid (currthread)))
1893 struct remote_state *rs = get_remote_state ();
1894 int fake_pid_p = !remote_multi_process_p (rs);
1896 inf = remote_add_inferior (fake_pid_p,
1897 ptid_get_pid (currthread), -1, 1);
1900 /* This is really a new thread. Add it. */
1901 remote_add_thread (currthread, running, executing);
1903 /* If we found a new inferior, let the common code do whatever
1904 it needs to with it (e.g., read shared libraries, insert
1905 breakpoints), unless we're just setting up an all-stop
1909 struct remote_state *rs = get_remote_state ();
1911 if (!rs->starting_up)
1912 notice_new_inferior (currthread, executing, 0);
1917 /* Return the private thread data, creating it if necessary. */
1919 static struct private_thread_info *
1920 demand_private_info (ptid_t ptid)
1922 struct thread_info *info = find_thread_ptid (ptid);
1928 info->priv = XNEW (struct private_thread_info);
1929 info->private_dtor = free_private_thread_info;
1930 info->priv->core = -1;
1931 info->priv->extra = NULL;
1932 info->priv->name = NULL;
1938 /* Call this function as a result of
1939 1) A halt indication (T packet) containing a thread id
1940 2) A direct query of currthread
1941 3) Successful execution of set thread */
1944 record_currthread (struct remote_state *rs, ptid_t currthread)
1946 rs->general_thread = currthread;
1949 /* If 'QPassSignals' is supported, tell the remote stub what signals
1950 it can simply pass through to the inferior without reporting. */
1953 remote_pass_signals (struct target_ops *self,
1954 int numsigs, unsigned char *pass_signals)
1956 if (packet_support (PACKET_QPassSignals) != PACKET_DISABLE)
1958 char *pass_packet, *p;
1960 struct remote_state *rs = get_remote_state ();
1962 gdb_assert (numsigs < 256);
1963 for (i = 0; i < numsigs; i++)
1965 if (pass_signals[i])
1968 pass_packet = (char *) xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
1969 strcpy (pass_packet, "QPassSignals:");
1970 p = pass_packet + strlen (pass_packet);
1971 for (i = 0; i < numsigs; i++)
1973 if (pass_signals[i])
1976 *p++ = tohex (i >> 4);
1977 *p++ = tohex (i & 15);
1986 if (!rs->last_pass_packet || strcmp (rs->last_pass_packet, pass_packet))
1988 putpkt (pass_packet);
1989 getpkt (&rs->buf, &rs->buf_size, 0);
1990 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QPassSignals]);
1991 if (rs->last_pass_packet)
1992 xfree (rs->last_pass_packet);
1993 rs->last_pass_packet = pass_packet;
1996 xfree (pass_packet);
2000 /* If 'QCatchSyscalls' is supported, tell the remote stub
2001 to report syscalls to GDB. */
2004 remote_set_syscall_catchpoint (struct target_ops *self,
2005 int pid, int needed, int any_count,
2006 int table_size, int *table)
2009 enum packet_result result;
2012 if (packet_support (PACKET_QCatchSyscalls) == PACKET_DISABLE)
2014 /* Not supported. */
2018 if (needed && !any_count)
2022 /* Count how many syscalls are to be caught (table[sysno] != 0). */
2023 for (i = 0; i < table_size; i++)
2032 fprintf_unfiltered (gdb_stdlog,
2033 "remote_set_syscall_catchpoint "
2034 "pid %d needed %d any_count %d n_sysno %d\n",
2035 pid, needed, any_count, n_sysno);
2040 /* Prepare a packet with the sysno list, assuming max 8+1
2041 characters for a sysno. If the resulting packet size is too
2042 big, fallback on the non-selective packet. */
2043 const int maxpktsz = strlen ("QCatchSyscalls:1") + n_sysno * 9 + 1;
2045 catch_packet = (char *) xmalloc (maxpktsz);
2046 strcpy (catch_packet, "QCatchSyscalls:1");
2055 /* Add in catch_packet each syscall to be caught (table[i] != 0). */
2056 for (i = 0; i < table_size; i++)
2059 p += xsnprintf (p, catch_packet + maxpktsz - p, ";%x", i);
2062 if (strlen (catch_packet) > get_remote_packet_size ())
2064 /* catch_packet too big. Fallback to less efficient
2065 non selective mode, with GDB doing the filtering. */
2066 catch_packet[sizeof ("QCatchSyscalls:1") - 1] = 0;
2070 catch_packet = xstrdup ("QCatchSyscalls:0");
2073 struct cleanup *old_chain = make_cleanup (xfree, catch_packet);
2074 struct remote_state *rs = get_remote_state ();
2076 putpkt (catch_packet);
2077 getpkt (&rs->buf, &rs->buf_size, 0);
2078 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_QCatchSyscalls]);
2079 do_cleanups (old_chain);
2080 if (result == PACKET_OK)
2087 /* If 'QProgramSignals' is supported, tell the remote stub what
2088 signals it should pass through to the inferior when detaching. */
2091 remote_program_signals (struct target_ops *self,
2092 int numsigs, unsigned char *signals)
2094 if (packet_support (PACKET_QProgramSignals) != PACKET_DISABLE)
2098 struct remote_state *rs = get_remote_state ();
2100 gdb_assert (numsigs < 256);
2101 for (i = 0; i < numsigs; i++)
2106 packet = (char *) xmalloc (count * 3 + strlen ("QProgramSignals:") + 1);
2107 strcpy (packet, "QProgramSignals:");
2108 p = packet + strlen (packet);
2109 for (i = 0; i < numsigs; i++)
2111 if (signal_pass_state (i))
2114 *p++ = tohex (i >> 4);
2115 *p++ = tohex (i & 15);
2124 if (!rs->last_program_signals_packet
2125 || strcmp (rs->last_program_signals_packet, packet) != 0)
2128 getpkt (&rs->buf, &rs->buf_size, 0);
2129 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QProgramSignals]);
2130 xfree (rs->last_program_signals_packet);
2131 rs->last_program_signals_packet = packet;
2138 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2139 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2140 thread. If GEN is set, set the general thread, if not, then set
2141 the step/continue thread. */
2143 set_thread (struct ptid ptid, int gen)
2145 struct remote_state *rs = get_remote_state ();
2146 ptid_t state = gen ? rs->general_thread : rs->continue_thread;
2147 char *buf = rs->buf;
2148 char *endbuf = rs->buf + get_remote_packet_size ();
2150 if (ptid_equal (state, ptid))
2154 *buf++ = gen ? 'g' : 'c';
2155 if (ptid_equal (ptid, magic_null_ptid))
2156 xsnprintf (buf, endbuf - buf, "0");
2157 else if (ptid_equal (ptid, any_thread_ptid))
2158 xsnprintf (buf, endbuf - buf, "0");
2159 else if (ptid_equal (ptid, minus_one_ptid))
2160 xsnprintf (buf, endbuf - buf, "-1");
2162 write_ptid (buf, endbuf, ptid);
2164 getpkt (&rs->buf, &rs->buf_size, 0);
2166 rs->general_thread = ptid;
2168 rs->continue_thread = ptid;
2172 set_general_thread (struct ptid ptid)
2174 set_thread (ptid, 1);
2178 set_continue_thread (struct ptid ptid)
2180 set_thread (ptid, 0);
2183 /* Change the remote current process. Which thread within the process
2184 ends up selected isn't important, as long as it is the same process
2185 as what INFERIOR_PTID points to.
2187 This comes from that fact that there is no explicit notion of
2188 "selected process" in the protocol. The selected process for
2189 general operations is the process the selected general thread
2193 set_general_process (void)
2195 struct remote_state *rs = get_remote_state ();
2197 /* If the remote can't handle multiple processes, don't bother. */
2198 if (!remote_multi_process_p (rs))
2201 /* We only need to change the remote current thread if it's pointing
2202 at some other process. */
2203 if (ptid_get_pid (rs->general_thread) != ptid_get_pid (inferior_ptid))
2204 set_general_thread (inferior_ptid);
2208 /* Return nonzero if this is the main thread that we made up ourselves
2209 to model non-threaded targets as single-threaded. */
2212 remote_thread_always_alive (struct target_ops *ops, ptid_t ptid)
2214 if (ptid_equal (ptid, magic_null_ptid))
2215 /* The main thread is always alive. */
2218 if (ptid_get_pid (ptid) != 0 && ptid_get_lwp (ptid) == 0)
2219 /* The main thread is always alive. This can happen after a
2220 vAttach, if the remote side doesn't support
2227 /* Return nonzero if the thread PTID is still alive on the remote
2231 remote_thread_alive (struct target_ops *ops, ptid_t ptid)
2233 struct remote_state *rs = get_remote_state ();
2236 /* Check if this is a thread that we made up ourselves to model
2237 non-threaded targets as single-threaded. */
2238 if (remote_thread_always_alive (ops, ptid))
2242 endp = rs->buf + get_remote_packet_size ();
2245 write_ptid (p, endp, ptid);
2248 getpkt (&rs->buf, &rs->buf_size, 0);
2249 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
2252 /* Return a pointer to a thread name if we know it and NULL otherwise.
2253 The thread_info object owns the memory for the name. */
2256 remote_thread_name (struct target_ops *ops, struct thread_info *info)
2258 if (info->priv != NULL)
2259 return info->priv->name;
2264 /* About these extended threadlist and threadinfo packets. They are
2265 variable length packets but, the fields within them are often fixed
2266 length. They are redundent enough to send over UDP as is the
2267 remote protocol in general. There is a matching unit test module
2270 /* WARNING: This threadref data structure comes from the remote O.S.,
2271 libstub protocol encoding, and remote.c. It is not particularly
2274 /* Right now, the internal structure is int. We want it to be bigger.
2275 Plan to fix this. */
2277 typedef int gdb_threadref; /* Internal GDB thread reference. */
2279 /* gdb_ext_thread_info is an internal GDB data structure which is
2280 equivalent to the reply of the remote threadinfo packet. */
2282 struct gdb_ext_thread_info
2284 threadref threadid; /* External form of thread reference. */
2285 int active; /* Has state interesting to GDB?
2287 char display[256]; /* Brief state display, name,
2288 blocked/suspended. */
2289 char shortname[32]; /* To be used to name threads. */
2290 char more_display[256]; /* Long info, statistics, queue depth,
2294 /* The volume of remote transfers can be limited by submitting
2295 a mask containing bits specifying the desired information.
2296 Use a union of these values as the 'selection' parameter to
2297 get_thread_info. FIXME: Make these TAG names more thread specific. */
2299 #define TAG_THREADID 1
2300 #define TAG_EXISTS 2
2301 #define TAG_DISPLAY 4
2302 #define TAG_THREADNAME 8
2303 #define TAG_MOREDISPLAY 16
2305 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2307 static char *unpack_nibble (char *buf, int *val);
2309 static char *unpack_byte (char *buf, int *value);
2311 static char *pack_int (char *buf, int value);
2313 static char *unpack_int (char *buf, int *value);
2315 static char *unpack_string (char *src, char *dest, int length);
2317 static char *pack_threadid (char *pkt, threadref *id);
2319 static char *unpack_threadid (char *inbuf, threadref *id);
2321 void int_to_threadref (threadref *id, int value);
2323 static int threadref_to_int (threadref *ref);
2325 static void copy_threadref (threadref *dest, threadref *src);
2327 static int threadmatch (threadref *dest, threadref *src);
2329 static char *pack_threadinfo_request (char *pkt, int mode,
2332 static int remote_unpack_thread_info_response (char *pkt,
2333 threadref *expectedref,
2334 struct gdb_ext_thread_info
2338 static int remote_get_threadinfo (threadref *threadid,
2339 int fieldset, /*TAG mask */
2340 struct gdb_ext_thread_info *info);
2342 static char *pack_threadlist_request (char *pkt, int startflag,
2344 threadref *nextthread);
2346 static int parse_threadlist_response (char *pkt,
2348 threadref *original_echo,
2349 threadref *resultlist,
2352 static int remote_get_threadlist (int startflag,
2353 threadref *nextthread,
2357 threadref *threadlist);
2359 typedef int (*rmt_thread_action) (threadref *ref, void *context);
2361 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
2362 void *context, int looplimit);
2364 static int remote_newthread_step (threadref *ref, void *context);
2367 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2368 buffer we're allowed to write to. Returns
2369 BUF+CHARACTERS_WRITTEN. */
2372 write_ptid (char *buf, const char *endbuf, ptid_t ptid)
2375 struct remote_state *rs = get_remote_state ();
2377 if (remote_multi_process_p (rs))
2379 pid = ptid_get_pid (ptid);
2381 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
2383 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
2385 tid = ptid_get_lwp (ptid);
2387 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
2389 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
2394 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
2395 passed the last parsed char. Returns null_ptid on error. */
2398 read_ptid (char *buf, char **obuf)
2402 ULONGEST pid = 0, tid = 0;
2406 /* Multi-process ptid. */
2407 pp = unpack_varlen_hex (p + 1, &pid);
2409 error (_("invalid remote ptid: %s"), p);
2412 pp = unpack_varlen_hex (p + 1, &tid);
2415 return ptid_build (pid, tid, 0);
2418 /* No multi-process. Just a tid. */
2419 pp = unpack_varlen_hex (p, &tid);
2421 /* Return null_ptid when no thread id is found. */
2429 /* Since the stub is not sending a process id, then default to
2430 what's in inferior_ptid, unless it's null at this point. If so,
2431 then since there's no way to know the pid of the reported
2432 threads, use the magic number. */
2433 if (ptid_equal (inferior_ptid, null_ptid))
2434 pid = ptid_get_pid (magic_null_ptid);
2436 pid = ptid_get_pid (inferior_ptid);
2440 return ptid_build (pid, tid, 0);
2446 if (ch >= 'a' && ch <= 'f')
2447 return ch - 'a' + 10;
2448 if (ch >= '0' && ch <= '9')
2450 if (ch >= 'A' && ch <= 'F')
2451 return ch - 'A' + 10;
2456 stub_unpack_int (char *buff, int fieldlength)
2463 nibble = stubhex (*buff++);
2467 retval = retval << 4;
2473 unpack_nibble (char *buf, int *val)
2475 *val = fromhex (*buf++);
2480 unpack_byte (char *buf, int *value)
2482 *value = stub_unpack_int (buf, 2);
2487 pack_int (char *buf, int value)
2489 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
2490 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
2491 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
2492 buf = pack_hex_byte (buf, (value & 0xff));
2497 unpack_int (char *buf, int *value)
2499 *value = stub_unpack_int (buf, 8);
2503 #if 0 /* Currently unused, uncomment when needed. */
2504 static char *pack_string (char *pkt, char *string);
2507 pack_string (char *pkt, char *string)
2512 len = strlen (string);
2514 len = 200; /* Bigger than most GDB packets, junk??? */
2515 pkt = pack_hex_byte (pkt, len);
2519 if ((ch == '\0') || (ch == '#'))
2520 ch = '*'; /* Protect encapsulation. */
2525 #endif /* 0 (unused) */
2528 unpack_string (char *src, char *dest, int length)
2537 pack_threadid (char *pkt, threadref *id)
2540 unsigned char *altid;
2542 altid = (unsigned char *) id;
2543 limit = pkt + BUF_THREAD_ID_SIZE;
2545 pkt = pack_hex_byte (pkt, *altid++);
2551 unpack_threadid (char *inbuf, threadref *id)
2554 char *limit = inbuf + BUF_THREAD_ID_SIZE;
2557 altref = (char *) id;
2559 while (inbuf < limit)
2561 x = stubhex (*inbuf++);
2562 y = stubhex (*inbuf++);
2563 *altref++ = (x << 4) | y;
2568 /* Externally, threadrefs are 64 bits but internally, they are still
2569 ints. This is due to a mismatch of specifications. We would like
2570 to use 64bit thread references internally. This is an adapter
2574 int_to_threadref (threadref *id, int value)
2576 unsigned char *scan;
2578 scan = (unsigned char *) id;
2584 *scan++ = (value >> 24) & 0xff;
2585 *scan++ = (value >> 16) & 0xff;
2586 *scan++ = (value >> 8) & 0xff;
2587 *scan++ = (value & 0xff);
2591 threadref_to_int (threadref *ref)
2594 unsigned char *scan;
2600 value = (value << 8) | ((*scan++) & 0xff);
2605 copy_threadref (threadref *dest, threadref *src)
2608 unsigned char *csrc, *cdest;
2610 csrc = (unsigned char *) src;
2611 cdest = (unsigned char *) dest;
2618 threadmatch (threadref *dest, threadref *src)
2620 /* Things are broken right now, so just assume we got a match. */
2622 unsigned char *srcp, *destp;
2624 srcp = (char *) src;
2625 destp = (char *) dest;
2629 result &= (*srcp++ == *destp++) ? 1 : 0;
2636 threadid:1, # always request threadid
2643 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2646 pack_threadinfo_request (char *pkt, int mode, threadref *id)
2648 *pkt++ = 'q'; /* Info Query */
2649 *pkt++ = 'P'; /* process or thread info */
2650 pkt = pack_int (pkt, mode); /* mode */
2651 pkt = pack_threadid (pkt, id); /* threadid */
2652 *pkt = '\0'; /* terminate */
2656 /* These values tag the fields in a thread info response packet. */
2657 /* Tagging the fields allows us to request specific fields and to
2658 add more fields as time goes by. */
2660 #define TAG_THREADID 1 /* Echo the thread identifier. */
2661 #define TAG_EXISTS 2 /* Is this process defined enough to
2662 fetch registers and its stack? */
2663 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2664 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2665 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2669 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
2670 struct gdb_ext_thread_info *info)
2672 struct remote_state *rs = get_remote_state ();
2676 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
2679 /* info->threadid = 0; FIXME: implement zero_threadref. */
2681 info->display[0] = '\0';
2682 info->shortname[0] = '\0';
2683 info->more_display[0] = '\0';
2685 /* Assume the characters indicating the packet type have been
2687 pkt = unpack_int (pkt, &mask); /* arg mask */
2688 pkt = unpack_threadid (pkt, &ref);
2691 warning (_("Incomplete response to threadinfo request."));
2692 if (!threadmatch (&ref, expectedref))
2693 { /* This is an answer to a different request. */
2694 warning (_("ERROR RMT Thread info mismatch."));
2697 copy_threadref (&info->threadid, &ref);
2699 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2701 /* Packets are terminated with nulls. */
2702 while ((pkt < limit) && mask && *pkt)
2704 pkt = unpack_int (pkt, &tag); /* tag */
2705 pkt = unpack_byte (pkt, &length); /* length */
2706 if (!(tag & mask)) /* Tags out of synch with mask. */
2708 warning (_("ERROR RMT: threadinfo tag mismatch."));
2712 if (tag == TAG_THREADID)
2716 warning (_("ERROR RMT: length of threadid is not 16."));
2720 pkt = unpack_threadid (pkt, &ref);
2721 mask = mask & ~TAG_THREADID;
2724 if (tag == TAG_EXISTS)
2726 info->active = stub_unpack_int (pkt, length);
2728 mask = mask & ~(TAG_EXISTS);
2731 warning (_("ERROR RMT: 'exists' length too long."));
2737 if (tag == TAG_THREADNAME)
2739 pkt = unpack_string (pkt, &info->shortname[0], length);
2740 mask = mask & ~TAG_THREADNAME;
2743 if (tag == TAG_DISPLAY)
2745 pkt = unpack_string (pkt, &info->display[0], length);
2746 mask = mask & ~TAG_DISPLAY;
2749 if (tag == TAG_MOREDISPLAY)
2751 pkt = unpack_string (pkt, &info->more_display[0], length);
2752 mask = mask & ~TAG_MOREDISPLAY;
2755 warning (_("ERROR RMT: unknown thread info tag."));
2756 break; /* Not a tag we know about. */
2762 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
2763 struct gdb_ext_thread_info *info)
2765 struct remote_state *rs = get_remote_state ();
2768 pack_threadinfo_request (rs->buf, fieldset, threadid);
2770 getpkt (&rs->buf, &rs->buf_size, 0);
2772 if (rs->buf[0] == '\0')
2775 result = remote_unpack_thread_info_response (rs->buf + 2,
2780 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2783 pack_threadlist_request (char *pkt, int startflag, int threadcount,
2784 threadref *nextthread)
2786 *pkt++ = 'q'; /* info query packet */
2787 *pkt++ = 'L'; /* Process LIST or threadLIST request */
2788 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
2789 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
2790 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
2795 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2798 parse_threadlist_response (char *pkt, int result_limit,
2799 threadref *original_echo, threadref *resultlist,
2802 struct remote_state *rs = get_remote_state ();
2804 int count, resultcount, done;
2807 /* Assume the 'q' and 'M chars have been stripped. */
2808 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
2809 /* done parse past here */
2810 pkt = unpack_byte (pkt, &count); /* count field */
2811 pkt = unpack_nibble (pkt, &done);
2812 /* The first threadid is the argument threadid. */
2813 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
2814 while ((count-- > 0) && (pkt < limit))
2816 pkt = unpack_threadid (pkt, resultlist++);
2817 if (resultcount++ >= result_limit)
2825 /* Fetch the next batch of threads from the remote. Returns -1 if the
2826 qL packet is not supported, 0 on error and 1 on success. */
2829 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
2830 int *done, int *result_count, threadref *threadlist)
2832 struct remote_state *rs = get_remote_state ();
2835 /* Trancate result limit to be smaller than the packet size. */
2836 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10)
2837 >= get_remote_packet_size ())
2838 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
2840 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
2842 getpkt (&rs->buf, &rs->buf_size, 0);
2843 if (*rs->buf == '\0')
2845 /* Packet not supported. */
2850 parse_threadlist_response (rs->buf + 2, result_limit,
2851 &rs->echo_nextthread, threadlist, done);
2853 if (!threadmatch (&rs->echo_nextthread, nextthread))
2855 /* FIXME: This is a good reason to drop the packet. */
2856 /* Possably, there is a duplicate response. */
2858 retransmit immediatly - race conditions
2859 retransmit after timeout - yes
2861 wait for packet, then exit
2863 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2864 return 0; /* I choose simply exiting. */
2866 if (*result_count <= 0)
2870 warning (_("RMT ERROR : failed to get remote thread list."));
2873 return result; /* break; */
2875 if (*result_count > result_limit)
2878 warning (_("RMT ERROR: threadlist response longer than requested."));
2884 /* Fetch the list of remote threads, with the qL packet, and call
2885 STEPFUNCTION for each thread found. Stops iterating and returns 1
2886 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2887 STEPFUNCTION returns false. If the packet is not supported,
2891 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
2894 struct remote_state *rs = get_remote_state ();
2895 int done, i, result_count;
2903 if (loopcount++ > looplimit)
2906 warning (_("Remote fetch threadlist -infinite loop-."));
2909 result = remote_get_threadlist (startflag, &rs->nextthread,
2910 MAXTHREADLISTRESULTS,
2911 &done, &result_count,
2912 rs->resultthreadlist);
2915 /* Clear for later iterations. */
2917 /* Setup to resume next batch of thread references, set nextthread. */
2918 if (result_count >= 1)
2919 copy_threadref (&rs->nextthread,
2920 &rs->resultthreadlist[result_count - 1]);
2922 while (result_count--)
2924 if (!(*stepfunction) (&rs->resultthreadlist[i++], context))
2934 /* A thread found on the remote target. */
2936 typedef struct thread_item
2938 /* The thread's PTID. */
2941 /* The thread's extra info. May be NULL. */
2944 /* The thread's name. May be NULL. */
2947 /* The core the thread was running on. -1 if not known. */
2950 DEF_VEC_O(thread_item_t);
2952 /* Context passed around to the various methods listing remote
2953 threads. As new threads are found, they're added to the ITEMS
2956 struct threads_listing_context
2958 /* The threads found on the remote target. */
2959 VEC (thread_item_t) *items;
2962 /* Discard the contents of the constructed thread listing context. */
2965 clear_threads_listing_context (void *p)
2967 struct threads_listing_context *context
2968 = (struct threads_listing_context *) p;
2970 struct thread_item *item;
2972 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
2974 xfree (item->extra);
2978 VEC_free (thread_item_t, context->items);
2981 /* Remove the thread specified as the related_pid field of WS
2982 from the CONTEXT list. */
2985 threads_listing_context_remove (struct target_waitstatus *ws,
2986 struct threads_listing_context *context)
2988 struct thread_item *item;
2990 ptid_t child_ptid = ws->value.related_pid;
2992 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
2994 if (ptid_equal (item->ptid, child_ptid))
2996 VEC_ordered_remove (thread_item_t, context->items, i);
3003 remote_newthread_step (threadref *ref, void *data)
3005 struct threads_listing_context *context
3006 = (struct threads_listing_context *) data;
3007 struct thread_item item;
3008 int pid = ptid_get_pid (inferior_ptid);
3010 item.ptid = ptid_build (pid, threadref_to_int (ref), 0);
3015 VEC_safe_push (thread_item_t, context->items, &item);
3017 return 1; /* continue iterator */
3020 #define CRAZY_MAX_THREADS 1000
3023 remote_current_thread (ptid_t oldpid)
3025 struct remote_state *rs = get_remote_state ();
3028 getpkt (&rs->buf, &rs->buf_size, 0);
3029 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
3034 result = read_ptid (&rs->buf[2], &obuf);
3035 if (*obuf != '\0' && remote_debug)
3036 fprintf_unfiltered (gdb_stdlog,
3037 "warning: garbage in qC reply\n");
3045 /* List remote threads using the deprecated qL packet. */
3048 remote_get_threads_with_ql (struct target_ops *ops,
3049 struct threads_listing_context *context)
3051 if (remote_threadlist_iterator (remote_newthread_step, context,
3052 CRAZY_MAX_THREADS) >= 0)
3058 #if defined(HAVE_LIBEXPAT)
3061 start_thread (struct gdb_xml_parser *parser,
3062 const struct gdb_xml_element *element,
3063 void *user_data, VEC(gdb_xml_value_s) *attributes)
3065 struct threads_listing_context *data
3066 = (struct threads_listing_context *) user_data;
3068 struct thread_item item;
3070 struct gdb_xml_value *attr;
3072 id = (char *) xml_find_attribute (attributes, "id")->value;
3073 item.ptid = read_ptid (id, NULL);
3075 attr = xml_find_attribute (attributes, "core");
3077 item.core = *(ULONGEST *) attr->value;
3081 attr = xml_find_attribute (attributes, "name");
3082 item.name = attr != NULL ? xstrdup ((const char *) attr->value) : NULL;
3086 VEC_safe_push (thread_item_t, data->items, &item);
3090 end_thread (struct gdb_xml_parser *parser,
3091 const struct gdb_xml_element *element,
3092 void *user_data, const char *body_text)
3094 struct threads_listing_context *data
3095 = (struct threads_listing_context *) user_data;
3097 if (body_text && *body_text)
3098 VEC_last (thread_item_t, data->items)->extra = xstrdup (body_text);
3101 const struct gdb_xml_attribute thread_attributes[] = {
3102 { "id", GDB_XML_AF_NONE, NULL, NULL },
3103 { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
3104 { "name", GDB_XML_AF_OPTIONAL, NULL, NULL },
3105 { NULL, GDB_XML_AF_NONE, NULL, NULL }
3108 const struct gdb_xml_element thread_children[] = {
3109 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3112 const struct gdb_xml_element threads_children[] = {
3113 { "thread", thread_attributes, thread_children,
3114 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
3115 start_thread, end_thread },
3116 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3119 const struct gdb_xml_element threads_elements[] = {
3120 { "threads", NULL, threads_children,
3121 GDB_XML_EF_NONE, NULL, NULL },
3122 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3127 /* List remote threads using qXfer:threads:read. */
3130 remote_get_threads_with_qxfer (struct target_ops *ops,
3131 struct threads_listing_context *context)
3133 #if defined(HAVE_LIBEXPAT)
3134 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3136 char *xml = target_read_stralloc (ops, TARGET_OBJECT_THREADS, NULL);
3137 struct cleanup *back_to = make_cleanup (xfree, xml);
3139 if (xml != NULL && *xml != '\0')
3141 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3142 threads_elements, xml, context);
3145 do_cleanups (back_to);
3153 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3156 remote_get_threads_with_qthreadinfo (struct target_ops *ops,
3157 struct threads_listing_context *context)
3159 struct remote_state *rs = get_remote_state ();
3161 if (rs->use_threadinfo_query)
3165 putpkt ("qfThreadInfo");
3166 getpkt (&rs->buf, &rs->buf_size, 0);
3168 if (bufp[0] != '\0') /* q packet recognized */
3170 while (*bufp++ == 'm') /* reply contains one or more TID */
3174 struct thread_item item;
3176 item.ptid = read_ptid (bufp, &bufp);
3181 VEC_safe_push (thread_item_t, context->items, &item);
3183 while (*bufp++ == ','); /* comma-separated list */
3184 putpkt ("qsThreadInfo");
3185 getpkt (&rs->buf, &rs->buf_size, 0);
3192 /* Packet not recognized. */
3193 rs->use_threadinfo_query = 0;
3200 /* Implement the to_update_thread_list function for the remote
3204 remote_update_thread_list (struct target_ops *ops)
3206 struct threads_listing_context context;
3207 struct cleanup *old_chain;
3210 context.items = NULL;
3211 old_chain = make_cleanup (clear_threads_listing_context, &context);
3213 /* We have a few different mechanisms to fetch the thread list. Try
3214 them all, starting with the most preferred one first, falling
3215 back to older methods. */
3216 if (remote_get_threads_with_qxfer (ops, &context)
3217 || remote_get_threads_with_qthreadinfo (ops, &context)
3218 || remote_get_threads_with_ql (ops, &context))
3221 struct thread_item *item;
3222 struct thread_info *tp, *tmp;
3226 if (VEC_empty (thread_item_t, context.items)
3227 && remote_thread_always_alive (ops, inferior_ptid))
3229 /* Some targets don't really support threads, but still
3230 reply an (empty) thread list in response to the thread
3231 listing packets, instead of replying "packet not
3232 supported". Exit early so we don't delete the main
3234 do_cleanups (old_chain);
3238 /* CONTEXT now holds the current thread list on the remote
3239 target end. Delete GDB-side threads no longer found on the
3241 ALL_THREADS_SAFE (tp, tmp)
3244 VEC_iterate (thread_item_t, context.items, i, item);
3247 if (ptid_equal (item->ptid, tp->ptid))
3251 if (i == VEC_length (thread_item_t, context.items))
3254 delete_thread (tp->ptid);
3258 /* Remove any unreported fork child threads from CONTEXT so
3259 that we don't interfere with follow fork, which is where
3260 creation of such threads is handled. */
3261 remove_new_fork_children (&context);
3263 /* And now add threads we don't know about yet to our list. */
3265 VEC_iterate (thread_item_t, context.items, i, item);
3268 if (!ptid_equal (item->ptid, null_ptid))
3270 struct private_thread_info *info;
3271 /* In non-stop mode, we assume new found threads are
3272 executing until proven otherwise with a stop reply.
3273 In all-stop, we can only get here if all threads are
3275 int executing = target_is_non_stop_p () ? 1 : 0;
3277 remote_notice_new_inferior (item->ptid, executing);
3279 info = demand_private_info (item->ptid);
3280 info->core = item->core;
3281 info->extra = item->extra;
3283 info->name = item->name;
3291 /* If no thread listing method is supported, then query whether
3292 each known thread is alive, one by one, with the T packet.
3293 If the target doesn't support threads at all, then this is a
3294 no-op. See remote_thread_alive. */
3298 do_cleanups (old_chain);
3302 * Collect a descriptive string about the given thread.
3303 * The target may say anything it wants to about the thread
3304 * (typically info about its blocked / runnable state, name, etc.).
3305 * This string will appear in the info threads display.
3307 * Optional: targets are not required to implement this function.
3311 remote_threads_extra_info (struct target_ops *self, struct thread_info *tp)
3313 struct remote_state *rs = get_remote_state ();
3317 struct gdb_ext_thread_info threadinfo;
3318 static char display_buf[100]; /* arbitrary... */
3319 int n = 0; /* position in display_buf */
3321 if (rs->remote_desc == 0) /* paranoia */
3322 internal_error (__FILE__, __LINE__,
3323 _("remote_threads_extra_info"));
3325 if (ptid_equal (tp->ptid, magic_null_ptid)
3326 || (ptid_get_pid (tp->ptid) != 0 && ptid_get_lwp (tp->ptid) == 0))
3327 /* This is the main thread which was added by GDB. The remote
3328 server doesn't know about it. */
3331 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3333 struct thread_info *info = find_thread_ptid (tp->ptid);
3335 if (info && info->priv)
3336 return info->priv->extra;
3341 if (rs->use_threadextra_query)
3344 char *endb = rs->buf + get_remote_packet_size ();
3346 xsnprintf (b, endb - b, "qThreadExtraInfo,");
3348 write_ptid (b, endb, tp->ptid);
3351 getpkt (&rs->buf, &rs->buf_size, 0);
3352 if (rs->buf[0] != 0)
3354 n = min (strlen (rs->buf) / 2, sizeof (display_buf));
3355 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
3356 display_buf [result] = '\0';
3361 /* If the above query fails, fall back to the old method. */
3362 rs->use_threadextra_query = 0;
3363 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
3364 | TAG_MOREDISPLAY | TAG_DISPLAY;
3365 int_to_threadref (&id, ptid_get_lwp (tp->ptid));
3366 if (remote_get_threadinfo (&id, set, &threadinfo))
3367 if (threadinfo.active)
3369 if (*threadinfo.shortname)
3370 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
3371 " Name: %s,", threadinfo.shortname);
3372 if (*threadinfo.display)
3373 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
3374 " State: %s,", threadinfo.display);
3375 if (*threadinfo.more_display)
3376 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
3377 " Priority: %s", threadinfo.more_display);
3381 /* For purely cosmetic reasons, clear up trailing commas. */
3382 if (',' == display_buf[n-1])
3383 display_buf[n-1] = ' ';
3392 remote_static_tracepoint_marker_at (struct target_ops *self, CORE_ADDR addr,
3393 struct static_tracepoint_marker *marker)
3395 struct remote_state *rs = get_remote_state ();
3398 xsnprintf (p, get_remote_packet_size (), "qTSTMat:");
3400 p += hexnumstr (p, addr);
3402 getpkt (&rs->buf, &rs->buf_size, 0);
3406 error (_("Remote failure reply: %s"), p);
3410 parse_static_tracepoint_marker_definition (p, &p, marker);
3417 static VEC(static_tracepoint_marker_p) *
3418 remote_static_tracepoint_markers_by_strid (struct target_ops *self,
3421 struct remote_state *rs = get_remote_state ();
3422 VEC(static_tracepoint_marker_p) *markers = NULL;
3423 struct static_tracepoint_marker *marker = NULL;
3424 struct cleanup *old_chain;
3427 /* Ask for a first packet of static tracepoint marker
3430 getpkt (&rs->buf, &rs->buf_size, 0);
3433 error (_("Remote failure reply: %s"), p);
3435 old_chain = make_cleanup (free_current_marker, &marker);
3440 marker = XCNEW (struct static_tracepoint_marker);
3444 parse_static_tracepoint_marker_definition (p, &p, marker);
3446 if (strid == NULL || strcmp (strid, marker->str_id) == 0)
3448 VEC_safe_push (static_tracepoint_marker_p,
3454 release_static_tracepoint_marker (marker);
3455 memset (marker, 0, sizeof (*marker));
3458 while (*p++ == ','); /* comma-separated list */
3459 /* Ask for another packet of static tracepoint definition. */
3461 getpkt (&rs->buf, &rs->buf_size, 0);
3465 do_cleanups (old_chain);
3470 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3473 remote_get_ada_task_ptid (struct target_ops *self, long lwp, long thread)
3475 return ptid_build (ptid_get_pid (inferior_ptid), lwp, 0);
3479 /* Restart the remote side; this is an extended protocol operation. */
3482 extended_remote_restart (void)
3484 struct remote_state *rs = get_remote_state ();
3486 /* Send the restart command; for reasons I don't understand the
3487 remote side really expects a number after the "R". */
3488 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
3491 remote_fileio_reset ();
3494 /* Clean up connection to a remote debugger. */
3497 remote_close (struct target_ops *self)
3499 struct remote_state *rs = get_remote_state ();
3501 if (rs->remote_desc == NULL)
3502 return; /* already closed */
3504 /* Make sure we leave stdin registered in the event loop. */
3505 remote_terminal_ours (self);
3507 serial_close (rs->remote_desc);
3508 rs->remote_desc = NULL;
3510 /* We don't have a connection to the remote stub anymore. Get rid
3511 of all the inferiors and their threads we were controlling.
3512 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3513 will be unable to find the thread corresponding to (pid, 0, 0). */
3514 inferior_ptid = null_ptid;
3515 discard_all_inferiors ();
3517 /* We are closing the remote target, so we should discard
3518 everything of this target. */
3519 discard_pending_stop_replies_in_queue (rs);
3521 if (remote_async_inferior_event_token)
3522 delete_async_event_handler (&remote_async_inferior_event_token);
3524 remote_notif_state_xfree (rs->notif_state);
3526 trace_reset_local_state ();
3529 /* Query the remote side for the text, data and bss offsets. */
3534 struct remote_state *rs = get_remote_state ();
3537 int lose, num_segments = 0, do_sections, do_segments;
3538 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
3539 struct section_offsets *offs;
3540 struct symfile_segment_data *data;
3542 if (symfile_objfile == NULL)
3545 putpkt ("qOffsets");
3546 getpkt (&rs->buf, &rs->buf_size, 0);
3549 if (buf[0] == '\000')
3550 return; /* Return silently. Stub doesn't support
3554 warning (_("Remote failure reply: %s"), buf);
3558 /* Pick up each field in turn. This used to be done with scanf, but
3559 scanf will make trouble if CORE_ADDR size doesn't match
3560 conversion directives correctly. The following code will work
3561 with any size of CORE_ADDR. */
3562 text_addr = data_addr = bss_addr = 0;
3566 if (startswith (ptr, "Text="))
3569 /* Don't use strtol, could lose on big values. */
3570 while (*ptr && *ptr != ';')
3571 text_addr = (text_addr << 4) + fromhex (*ptr++);
3573 if (startswith (ptr, ";Data="))
3576 while (*ptr && *ptr != ';')
3577 data_addr = (data_addr << 4) + fromhex (*ptr++);
3582 if (!lose && startswith (ptr, ";Bss="))
3585 while (*ptr && *ptr != ';')
3586 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
3588 if (bss_addr != data_addr)
3589 warning (_("Target reported unsupported offsets: %s"), buf);
3594 else if (startswith (ptr, "TextSeg="))
3597 /* Don't use strtol, could lose on big values. */
3598 while (*ptr && *ptr != ';')
3599 text_addr = (text_addr << 4) + fromhex (*ptr++);
3602 if (startswith (ptr, ";DataSeg="))
3605 while (*ptr && *ptr != ';')
3606 data_addr = (data_addr << 4) + fromhex (*ptr++);
3614 error (_("Malformed response to offset query, %s"), buf);
3615 else if (*ptr != '\0')
3616 warning (_("Target reported unsupported offsets: %s"), buf);
3618 offs = ((struct section_offsets *)
3619 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
3620 memcpy (offs, symfile_objfile->section_offsets,
3621 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
3623 data = get_symfile_segment_data (symfile_objfile->obfd);
3624 do_segments = (data != NULL);
3625 do_sections = num_segments == 0;
3627 if (num_segments > 0)
3629 segments[0] = text_addr;
3630 segments[1] = data_addr;
3632 /* If we have two segments, we can still try to relocate everything
3633 by assuming that the .text and .data offsets apply to the whole
3634 text and data segments. Convert the offsets given in the packet
3635 to base addresses for symfile_map_offsets_to_segments. */
3636 else if (data && data->num_segments == 2)
3638 segments[0] = data->segment_bases[0] + text_addr;
3639 segments[1] = data->segment_bases[1] + data_addr;
3642 /* If the object file has only one segment, assume that it is text
3643 rather than data; main programs with no writable data are rare,
3644 but programs with no code are useless. Of course the code might
3645 have ended up in the data segment... to detect that we would need
3646 the permissions here. */
3647 else if (data && data->num_segments == 1)
3649 segments[0] = data->segment_bases[0] + text_addr;
3652 /* There's no way to relocate by segment. */
3658 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
3659 offs, num_segments, segments);
3661 if (ret == 0 && !do_sections)
3662 error (_("Can not handle qOffsets TextSeg "
3663 "response with this symbol file"));
3670 free_symfile_segment_data (data);
3674 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
3676 /* This is a temporary kludge to force data and bss to use the
3677 same offsets because that's what nlmconv does now. The real
3678 solution requires changes to the stub and remote.c that I
3679 don't have time to do right now. */
3681 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
3682 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
3685 objfile_relocate (symfile_objfile, offs);
3688 /* Send interrupt_sequence to remote target. */
3690 send_interrupt_sequence (void)
3692 struct remote_state *rs = get_remote_state ();
3694 if (interrupt_sequence_mode == interrupt_sequence_control_c)
3695 remote_serial_write ("\x03", 1);
3696 else if (interrupt_sequence_mode == interrupt_sequence_break)
3697 serial_send_break (rs->remote_desc);
3698 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
3700 serial_send_break (rs->remote_desc);
3701 remote_serial_write ("g", 1);
3704 internal_error (__FILE__, __LINE__,
3705 _("Invalid value for interrupt_sequence_mode: %s."),
3706 interrupt_sequence_mode);
3710 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3711 and extract the PTID. Returns NULL_PTID if not found. */
3714 stop_reply_extract_thread (char *stop_reply)
3716 if (stop_reply[0] == 'T' && strlen (stop_reply) > 3)
3720 /* Txx r:val ; r:val (...) */
3723 /* Look for "register" named "thread". */
3728 p1 = strchr (p, ':');
3732 if (strncmp (p, "thread", p1 - p) == 0)
3733 return read_ptid (++p1, &p);
3735 p1 = strchr (p, ';');
3747 /* Determine the remote side's current thread. If we have a stop
3748 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3749 "thread" register we can extract the current thread from. If not,
3750 ask the remote which is the current thread with qC. The former
3751 method avoids a roundtrip. */
3754 get_current_thread (char *wait_status)
3756 ptid_t ptid = null_ptid;
3758 /* Note we don't use remote_parse_stop_reply as that makes use of
3759 the target architecture, which we haven't yet fully determined at
3761 if (wait_status != NULL)
3762 ptid = stop_reply_extract_thread (wait_status);
3763 if (ptid_equal (ptid, null_ptid))
3764 ptid = remote_current_thread (inferior_ptid);
3769 /* Query the remote target for which is the current thread/process,
3770 add it to our tables, and update INFERIOR_PTID. The caller is
3771 responsible for setting the state such that the remote end is ready
3772 to return the current thread.
3774 This function is called after handling the '?' or 'vRun' packets,
3775 whose response is a stop reply from which we can also try
3776 extracting the thread. If the target doesn't support the explicit
3777 qC query, we infer the current thread from that stop reply, passed
3778 in in WAIT_STATUS, which may be NULL. */
3781 add_current_inferior_and_thread (char *wait_status)
3783 struct remote_state *rs = get_remote_state ();
3787 inferior_ptid = null_ptid;
3789 /* Now, if we have thread information, update inferior_ptid. */
3790 ptid = get_current_thread (wait_status);
3792 if (!ptid_equal (ptid, null_ptid))
3794 if (!remote_multi_process_p (rs))
3797 inferior_ptid = ptid;
3801 /* Without this, some commands which require an active target
3802 (such as kill) won't work. This variable serves (at least)
3803 double duty as both the pid of the target process (if it has
3804 such), and as a flag indicating that a target is active. */
3805 inferior_ptid = magic_null_ptid;
3809 remote_add_inferior (fake_pid_p, ptid_get_pid (inferior_ptid), -1, 1);
3811 /* Add the main thread. */
3812 add_thread_silent (inferior_ptid);
3815 /* Print info about a thread that was found already stopped on
3819 print_one_stopped_thread (struct thread_info *thread)
3821 struct target_waitstatus *ws = &thread->suspend.waitstatus;
3823 switch_to_thread (thread->ptid);
3824 stop_pc = get_frame_pc (get_current_frame ());
3825 set_current_sal_from_frame (get_current_frame ());
3827 thread->suspend.waitstatus_pending_p = 0;
3829 if (ws->kind == TARGET_WAITKIND_STOPPED)
3831 enum gdb_signal sig = ws->value.sig;
3833 if (signal_print_state (sig))
3834 observer_notify_signal_received (sig);
3836 observer_notify_normal_stop (NULL, 1);
3839 /* Process all initial stop replies the remote side sent in response
3840 to the ? packet. These indicate threads that were already stopped
3841 on initial connection. We mark these threads as stopped and print
3842 their current frame before giving the user the prompt. */
3845 process_initial_stop_replies (int from_tty)
3847 int pending_stop_replies = stop_reply_queue_length ();
3848 struct inferior *inf;
3849 struct thread_info *thread;
3850 struct thread_info *selected = NULL;
3851 struct thread_info *lowest_stopped = NULL;
3852 struct thread_info *first = NULL;
3854 /* Consume the initial pending events. */
3855 while (pending_stop_replies-- > 0)
3857 ptid_t waiton_ptid = minus_one_ptid;
3859 struct target_waitstatus ws;
3860 int ignore_event = 0;
3861 struct thread_info *thread;
3863 memset (&ws, 0, sizeof (ws));
3864 event_ptid = target_wait (waiton_ptid, &ws, TARGET_WNOHANG);
3866 print_target_wait_results (waiton_ptid, event_ptid, &ws);
3870 case TARGET_WAITKIND_IGNORE:
3871 case TARGET_WAITKIND_NO_RESUMED:
3872 case TARGET_WAITKIND_SIGNALLED:
3873 case TARGET_WAITKIND_EXITED:
3874 /* We shouldn't see these, but if we do, just ignore. */
3876 fprintf_unfiltered (gdb_stdlog, "remote: event ignored\n");
3880 case TARGET_WAITKIND_EXECD:
3881 xfree (ws.value.execd_pathname);
3890 thread = find_thread_ptid (event_ptid);
3892 if (ws.kind == TARGET_WAITKIND_STOPPED)
3894 enum gdb_signal sig = ws.value.sig;
3896 /* Stubs traditionally report SIGTRAP as initial signal,
3897 instead of signal 0. Suppress it. */
3898 if (sig == GDB_SIGNAL_TRAP)
3900 thread->suspend.stop_signal = sig;
3904 thread->suspend.waitstatus = ws;
3906 if (ws.kind != TARGET_WAITKIND_STOPPED
3907 || ws.value.sig != GDB_SIGNAL_0)
3908 thread->suspend.waitstatus_pending_p = 1;
3910 set_executing (event_ptid, 0);
3911 set_running (event_ptid, 0);
3914 /* "Notice" the new inferiors before anything related to
3915 registers/memory. */
3921 inf->needs_setup = 1;
3925 thread = any_live_thread_of_process (inf->pid);
3926 notice_new_inferior (thread->ptid,
3927 thread->state == THREAD_RUNNING,
3932 /* If all-stop on top of non-stop, pause all threads. Note this
3933 records the threads' stop pc, so must be done after "noticing"
3937 stop_all_threads ();
3939 /* If all threads of an inferior were already stopped, we
3940 haven't setup the inferior yet. */
3946 if (inf->needs_setup)
3948 thread = any_live_thread_of_process (inf->pid);
3949 switch_to_thread_no_regs (thread);
3955 /* Now go over all threads that are stopped, and print their current
3956 frame. If all-stop, then if there's a signalled thread, pick
3958 ALL_NON_EXITED_THREADS (thread)
3964 set_running (thread->ptid, 0);
3965 else if (thread->state != THREAD_STOPPED)
3968 if (selected == NULL
3969 && thread->suspend.waitstatus_pending_p)
3972 if (lowest_stopped == NULL
3973 || thread->inf->num < lowest_stopped->inf->num
3974 || thread->per_inf_num < lowest_stopped->per_inf_num)
3975 lowest_stopped = thread;
3978 print_one_stopped_thread (thread);
3981 /* In all-stop, we only print the status of one thread, and leave
3982 others with their status pending. */
3987 thread = lowest_stopped;
3991 print_one_stopped_thread (thread);
3994 /* For "info program". */
3995 thread = inferior_thread ();
3996 if (thread->state == THREAD_STOPPED)
3997 set_last_target_status (inferior_ptid, thread->suspend.waitstatus);
4000 /* Start the remote connection and sync state. */
4003 remote_start_remote (int from_tty, struct target_ops *target, int extended_p)
4005 struct remote_state *rs = get_remote_state ();
4006 struct packet_config *noack_config;
4007 char *wait_status = NULL;
4009 /* Signal other parts that we're going through the initial setup,
4010 and so things may not be stable yet. E.g., we don't try to
4011 install tracepoints until we've relocated symbols. Also, a
4012 Ctrl-C before we're connected and synced up can't interrupt the
4013 target. Instead, it offers to drop the (potentially wedged)
4015 rs->starting_up = 1;
4019 if (interrupt_on_connect)
4020 send_interrupt_sequence ();
4022 /* Ack any packet which the remote side has already sent. */
4023 remote_serial_write ("+", 1);
4025 /* The first packet we send to the target is the optional "supported
4026 packets" request. If the target can answer this, it will tell us
4027 which later probes to skip. */
4028 remote_query_supported ();
4030 /* If the stub wants to get a QAllow, compose one and send it. */
4031 if (packet_support (PACKET_QAllow) != PACKET_DISABLE)
4032 remote_set_permissions (target);
4034 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4035 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4036 as a reply to known packet. For packet "vFile:setfs:" it is an
4037 invalid reply and GDB would return error in
4038 remote_hostio_set_filesystem, making remote files access impossible.
4039 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4040 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4042 const char v_mustreplyempty[] = "vMustReplyEmpty";
4044 putpkt (v_mustreplyempty);
4045 getpkt (&rs->buf, &rs->buf_size, 0);
4046 if (strcmp (rs->buf, "OK") == 0)
4047 remote_protocol_packets[PACKET_vFile_setfs].support = PACKET_DISABLE;
4048 else if (strcmp (rs->buf, "") != 0)
4049 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty,
4053 /* Next, we possibly activate noack mode.
4055 If the QStartNoAckMode packet configuration is set to AUTO,
4056 enable noack mode if the stub reported a wish for it with
4059 If set to TRUE, then enable noack mode even if the stub didn't
4060 report it in qSupported. If the stub doesn't reply OK, the
4061 session ends with an error.
4063 If FALSE, then don't activate noack mode, regardless of what the
4064 stub claimed should be the default with qSupported. */
4066 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
4067 if (packet_config_support (noack_config) != PACKET_DISABLE)
4069 putpkt ("QStartNoAckMode");
4070 getpkt (&rs->buf, &rs->buf_size, 0);
4071 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
4077 /* Tell the remote that we are using the extended protocol. */
4079 getpkt (&rs->buf, &rs->buf_size, 0);
4082 /* Let the target know which signals it is allowed to pass down to
4084 update_signals_program_target ();
4086 /* Next, if the target can specify a description, read it. We do
4087 this before anything involving memory or registers. */
4088 target_find_description ();
4090 /* Next, now that we know something about the target, update the
4091 address spaces in the program spaces. */
4092 update_address_spaces ();
4094 /* On OSs where the list of libraries is global to all
4095 processes, we fetch them early. */
4096 if (gdbarch_has_global_solist (target_gdbarch ()))
4097 solib_add (NULL, from_tty, target, auto_solib_add);
4099 if (target_is_non_stop_p ())
4101 if (packet_support (PACKET_QNonStop) != PACKET_ENABLE)
4102 error (_("Non-stop mode requested, but remote "
4103 "does not support non-stop"));
4105 putpkt ("QNonStop:1");
4106 getpkt (&rs->buf, &rs->buf_size, 0);
4108 if (strcmp (rs->buf, "OK") != 0)
4109 error (_("Remote refused setting non-stop mode with: %s"), rs->buf);
4111 /* Find about threads and processes the stub is already
4112 controlling. We default to adding them in the running state.
4113 The '?' query below will then tell us about which threads are
4115 remote_update_thread_list (target);
4117 else if (packet_support (PACKET_QNonStop) == PACKET_ENABLE)
4119 /* Don't assume that the stub can operate in all-stop mode.
4120 Request it explicitly. */
4121 putpkt ("QNonStop:0");
4122 getpkt (&rs->buf, &rs->buf_size, 0);
4124 if (strcmp (rs->buf, "OK") != 0)
4125 error (_("Remote refused setting all-stop mode with: %s"), rs->buf);
4128 /* Upload TSVs regardless of whether the target is running or not. The
4129 remote stub, such as GDBserver, may have some predefined or builtin
4130 TSVs, even if the target is not running. */
4131 if (remote_get_trace_status (target, current_trace_status ()) != -1)
4133 struct uploaded_tsv *uploaded_tsvs = NULL;
4135 remote_upload_trace_state_variables (target, &uploaded_tsvs);
4136 merge_uploaded_trace_state_variables (&uploaded_tsvs);
4139 /* Check whether the target is running now. */
4141 getpkt (&rs->buf, &rs->buf_size, 0);
4143 if (!target_is_non_stop_p ())
4145 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
4148 error (_("The target is not running (try extended-remote?)"));
4150 /* We're connected, but not running. Drop out before we
4151 call start_remote. */
4152 rs->starting_up = 0;
4157 /* Save the reply for later. */
4158 wait_status = (char *) alloca (strlen (rs->buf) + 1);
4159 strcpy (wait_status, rs->buf);
4162 /* Fetch thread list. */
4163 target_update_thread_list ();
4165 /* Let the stub know that we want it to return the thread. */
4166 set_continue_thread (minus_one_ptid);
4168 if (thread_count () == 0)
4170 /* Target has no concept of threads at all. GDB treats
4171 non-threaded target as single-threaded; add a main
4173 add_current_inferior_and_thread (wait_status);
4177 /* We have thread information; select the thread the target
4178 says should be current. If we're reconnecting to a
4179 multi-threaded program, this will ideally be the thread
4180 that last reported an event before GDB disconnected. */
4181 inferior_ptid = get_current_thread (wait_status);
4182 if (ptid_equal (inferior_ptid, null_ptid))
4184 /* Odd... The target was able to list threads, but not
4185 tell us which thread was current (no "thread"
4186 register in T stop reply?). Just pick the first
4187 thread in the thread list then. */
4190 fprintf_unfiltered (gdb_stdlog,
4191 "warning: couldn't determine remote "
4192 "current thread; picking first in list.\n");
4194 inferior_ptid = thread_list->ptid;
4198 /* init_wait_for_inferior should be called before get_offsets in order
4199 to manage `inserted' flag in bp loc in a correct state.
4200 breakpoint_init_inferior, called from init_wait_for_inferior, set
4201 `inserted' flag to 0, while before breakpoint_re_set, called from
4202 start_remote, set `inserted' flag to 1. In the initialization of
4203 inferior, breakpoint_init_inferior should be called first, and then
4204 breakpoint_re_set can be called. If this order is broken, state of
4205 `inserted' flag is wrong, and cause some problems on breakpoint
4207 init_wait_for_inferior ();
4209 get_offsets (); /* Get text, data & bss offsets. */
4211 /* If we could not find a description using qXfer, and we know
4212 how to do it some other way, try again. This is not
4213 supported for non-stop; it could be, but it is tricky if
4214 there are no stopped threads when we connect. */
4215 if (remote_read_description_p (target)
4216 && gdbarch_target_desc (target_gdbarch ()) == NULL)
4218 target_clear_description ();
4219 target_find_description ();
4222 /* Use the previously fetched status. */
4223 gdb_assert (wait_status != NULL);
4224 strcpy (rs->buf, wait_status);
4225 rs->cached_wait_status = 1;
4227 start_remote (from_tty); /* Initialize gdb process mechanisms. */
4231 /* Clear WFI global state. Do this before finding about new
4232 threads and inferiors, and setting the current inferior.
4233 Otherwise we would clear the proceed status of the current
4234 inferior when we want its stop_soon state to be preserved
4235 (see notice_new_inferior). */
4236 init_wait_for_inferior ();
4238 /* In non-stop, we will either get an "OK", meaning that there
4239 are no stopped threads at this time; or, a regular stop
4240 reply. In the latter case, there may be more than one thread
4241 stopped --- we pull them all out using the vStopped
4243 if (strcmp (rs->buf, "OK") != 0)
4245 struct notif_client *notif = ¬if_client_stop;
4247 /* remote_notif_get_pending_replies acks this one, and gets
4249 rs->notif_state->pending_event[notif_client_stop.id]
4250 = remote_notif_parse (notif, rs->buf);
4251 remote_notif_get_pending_events (notif);
4254 if (thread_count () == 0)
4257 error (_("The target is not running (try extended-remote?)"));
4259 /* We're connected, but not running. Drop out before we
4260 call start_remote. */
4261 rs->starting_up = 0;
4265 /* In non-stop mode, any cached wait status will be stored in
4266 the stop reply queue. */
4267 gdb_assert (wait_status == NULL);
4269 /* Report all signals during attach/startup. */
4270 remote_pass_signals (target, 0, NULL);
4272 /* If there are already stopped threads, mark them stopped and
4273 report their stops before giving the prompt to the user. */
4274 process_initial_stop_replies (from_tty);
4276 if (target_can_async_p ())
4280 /* If we connected to a live target, do some additional setup. */
4281 if (target_has_execution)
4283 if (symfile_objfile) /* No use without a symbol-file. */
4284 remote_check_symbols ();
4287 /* Possibly the target has been engaged in a trace run started
4288 previously; find out where things are at. */
4289 if (remote_get_trace_status (target, current_trace_status ()) != -1)
4291 struct uploaded_tp *uploaded_tps = NULL;
4293 if (current_trace_status ()->running)
4294 printf_filtered (_("Trace is already running on the target.\n"));
4296 remote_upload_tracepoints (target, &uploaded_tps);
4298 merge_uploaded_tracepoints (&uploaded_tps);
4301 /* The thread and inferior lists are now synchronized with the
4302 target, our symbols have been relocated, and we're merged the
4303 target's tracepoints with ours. We're done with basic start
4305 rs->starting_up = 0;
4307 /* Maybe breakpoints are global and need to be inserted now. */
4308 if (breakpoints_should_be_inserted_now ())
4309 insert_breakpoints ();
4312 /* Open a connection to a remote debugger.
4313 NAME is the filename used for communication. */
4316 remote_open (const char *name, int from_tty)
4318 remote_open_1 (name, from_tty, &remote_ops, 0);
4321 /* Open a connection to a remote debugger using the extended
4322 remote gdb protocol. NAME is the filename used for communication. */
4325 extended_remote_open (const char *name, int from_tty)
4327 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
4330 /* Reset all packets back to "unknown support". Called when opening a
4331 new connection to a remote target. */
4334 reset_all_packet_configs_support (void)
4338 for (i = 0; i < PACKET_MAX; i++)
4339 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
4342 /* Initialize all packet configs. */
4345 init_all_packet_configs (void)
4349 for (i = 0; i < PACKET_MAX; i++)
4351 remote_protocol_packets[i].detect = AUTO_BOOLEAN_AUTO;
4352 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
4356 /* Symbol look-up. */
4359 remote_check_symbols (void)
4361 struct remote_state *rs = get_remote_state ();
4362 char *msg, *reply, *tmp;
4365 struct cleanup *old_chain;
4367 /* The remote side has no concept of inferiors that aren't running
4368 yet, it only knows about running processes. If we're connected
4369 but our current inferior is not running, we should not invite the
4370 remote target to request symbol lookups related to its
4371 (unrelated) current process. */
4372 if (!target_has_execution)
4375 if (packet_support (PACKET_qSymbol) == PACKET_DISABLE)
4378 /* Make sure the remote is pointing at the right process. Note
4379 there's no way to select "no process". */
4380 set_general_process ();
4382 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4383 because we need both at the same time. */
4384 msg = (char *) xmalloc (get_remote_packet_size ());
4385 old_chain = make_cleanup (xfree, msg);
4386 reply = (char *) xmalloc (get_remote_packet_size ());
4387 make_cleanup (free_current_contents, &reply);
4388 reply_size = get_remote_packet_size ();
4390 /* Invite target to request symbol lookups. */
4392 putpkt ("qSymbol::");
4393 getpkt (&reply, &reply_size, 0);
4394 packet_ok (reply, &remote_protocol_packets[PACKET_qSymbol]);
4396 while (startswith (reply, "qSymbol:"))
4398 struct bound_minimal_symbol sym;
4401 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
4403 sym = lookup_minimal_symbol (msg, NULL, NULL);
4404 if (sym.minsym == NULL)
4405 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
4408 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
4409 CORE_ADDR sym_addr = BMSYMBOL_VALUE_ADDRESS (sym);
4411 /* If this is a function address, return the start of code
4412 instead of any data function descriptor. */
4413 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4417 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
4418 phex_nz (sym_addr, addr_size), &reply[8]);
4422 getpkt (&reply, &reply_size, 0);
4425 do_cleanups (old_chain);
4428 static struct serial *
4429 remote_serial_open (const char *name)
4431 static int udp_warning = 0;
4433 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4434 of in ser-tcp.c, because it is the remote protocol assuming that the
4435 serial connection is reliable and not the serial connection promising
4437 if (!udp_warning && startswith (name, "udp:"))
4439 warning (_("The remote protocol may be unreliable over UDP.\n"
4440 "Some events may be lost, rendering further debugging "
4445 return serial_open (name);
4448 /* Inform the target of our permission settings. The permission flags
4449 work without this, but if the target knows the settings, it can do
4450 a couple things. First, it can add its own check, to catch cases
4451 that somehow manage to get by the permissions checks in target
4452 methods. Second, if the target is wired to disallow particular
4453 settings (for instance, a system in the field that is not set up to
4454 be able to stop at a breakpoint), it can object to any unavailable
4458 remote_set_permissions (struct target_ops *self)
4460 struct remote_state *rs = get_remote_state ();
4462 xsnprintf (rs->buf, get_remote_packet_size (), "QAllow:"
4463 "WriteReg:%x;WriteMem:%x;"
4464 "InsertBreak:%x;InsertTrace:%x;"
4465 "InsertFastTrace:%x;Stop:%x",
4466 may_write_registers, may_write_memory,
4467 may_insert_breakpoints, may_insert_tracepoints,
4468 may_insert_fast_tracepoints, may_stop);
4470 getpkt (&rs->buf, &rs->buf_size, 0);
4472 /* If the target didn't like the packet, warn the user. Do not try
4473 to undo the user's settings, that would just be maddening. */
4474 if (strcmp (rs->buf, "OK") != 0)
4475 warning (_("Remote refused setting permissions with: %s"), rs->buf);
4478 /* This type describes each known response to the qSupported
4480 struct protocol_feature
4482 /* The name of this protocol feature. */
4485 /* The default for this protocol feature. */
4486 enum packet_support default_support;
4488 /* The function to call when this feature is reported, or after
4489 qSupported processing if the feature is not supported.
4490 The first argument points to this structure. The second
4491 argument indicates whether the packet requested support be
4492 enabled, disabled, or probed (or the default, if this function
4493 is being called at the end of processing and this feature was
4494 not reported). The third argument may be NULL; if not NULL, it
4495 is a NUL-terminated string taken from the packet following
4496 this feature's name and an equals sign. */
4497 void (*func) (const struct protocol_feature *, enum packet_support,
4500 /* The corresponding packet for this feature. Only used if
4501 FUNC is remote_supported_packet. */
4506 remote_supported_packet (const struct protocol_feature *feature,
4507 enum packet_support support,
4508 const char *argument)
4512 warning (_("Remote qSupported response supplied an unexpected value for"
4513 " \"%s\"."), feature->name);
4517 remote_protocol_packets[feature->packet].support = support;
4521 remote_packet_size (const struct protocol_feature *feature,
4522 enum packet_support support, const char *value)
4524 struct remote_state *rs = get_remote_state ();
4529 if (support != PACKET_ENABLE)
4532 if (value == NULL || *value == '\0')
4534 warning (_("Remote target reported \"%s\" without a size."),
4540 packet_size = strtol (value, &value_end, 16);
4541 if (errno != 0 || *value_end != '\0' || packet_size < 0)
4543 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4544 feature->name, value);
4548 /* Record the new maximum packet size. */
4549 rs->explicit_packet_size = packet_size;
4552 static const struct protocol_feature remote_protocol_features[] = {
4553 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
4554 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
4555 PACKET_qXfer_auxv },
4556 { "qXfer:exec-file:read", PACKET_DISABLE, remote_supported_packet,
4557 PACKET_qXfer_exec_file },
4558 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
4559 PACKET_qXfer_features },
4560 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
4561 PACKET_qXfer_libraries },
4562 { "qXfer:libraries-svr4:read", PACKET_DISABLE, remote_supported_packet,
4563 PACKET_qXfer_libraries_svr4 },
4564 { "augmented-libraries-svr4-read", PACKET_DISABLE,
4565 remote_supported_packet, PACKET_augmented_libraries_svr4_read_feature },
4566 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
4567 PACKET_qXfer_memory_map },
4568 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
4569 PACKET_qXfer_spu_read },
4570 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
4571 PACKET_qXfer_spu_write },
4572 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
4573 PACKET_qXfer_osdata },
4574 { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet,
4575 PACKET_qXfer_threads },
4576 { "qXfer:traceframe-info:read", PACKET_DISABLE, remote_supported_packet,
4577 PACKET_qXfer_traceframe_info },
4578 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
4579 PACKET_QPassSignals },
4580 { "QCatchSyscalls", PACKET_DISABLE, remote_supported_packet,
4581 PACKET_QCatchSyscalls },
4582 { "QProgramSignals", PACKET_DISABLE, remote_supported_packet,
4583 PACKET_QProgramSignals },
4584 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
4585 PACKET_QStartNoAckMode },
4586 { "multiprocess", PACKET_DISABLE, remote_supported_packet,
4587 PACKET_multiprocess_feature },
4588 { "QNonStop", PACKET_DISABLE, remote_supported_packet, PACKET_QNonStop },
4589 { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
4590 PACKET_qXfer_siginfo_read },
4591 { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
4592 PACKET_qXfer_siginfo_write },
4593 { "ConditionalTracepoints", PACKET_DISABLE, remote_supported_packet,
4594 PACKET_ConditionalTracepoints },
4595 { "ConditionalBreakpoints", PACKET_DISABLE, remote_supported_packet,
4596 PACKET_ConditionalBreakpoints },
4597 { "BreakpointCommands", PACKET_DISABLE, remote_supported_packet,
4598 PACKET_BreakpointCommands },
4599 { "FastTracepoints", PACKET_DISABLE, remote_supported_packet,
4600 PACKET_FastTracepoints },
4601 { "StaticTracepoints", PACKET_DISABLE, remote_supported_packet,
4602 PACKET_StaticTracepoints },
4603 {"InstallInTrace", PACKET_DISABLE, remote_supported_packet,
4604 PACKET_InstallInTrace},
4605 { "DisconnectedTracing", PACKET_DISABLE, remote_supported_packet,
4606 PACKET_DisconnectedTracing_feature },
4607 { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
4609 { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
4611 { "TracepointSource", PACKET_DISABLE, remote_supported_packet,
4612 PACKET_TracepointSource },
4613 { "QAllow", PACKET_DISABLE, remote_supported_packet,
4615 { "EnableDisableTracepoints", PACKET_DISABLE, remote_supported_packet,
4616 PACKET_EnableDisableTracepoints_feature },
4617 { "qXfer:fdpic:read", PACKET_DISABLE, remote_supported_packet,
4618 PACKET_qXfer_fdpic },
4619 { "qXfer:uib:read", PACKET_DISABLE, remote_supported_packet,
4621 { "QDisableRandomization", PACKET_DISABLE, remote_supported_packet,
4622 PACKET_QDisableRandomization },
4623 { "QAgent", PACKET_DISABLE, remote_supported_packet, PACKET_QAgent},
4624 { "QTBuffer:size", PACKET_DISABLE,
4625 remote_supported_packet, PACKET_QTBuffer_size},
4626 { "tracenz", PACKET_DISABLE, remote_supported_packet, PACKET_tracenz_feature },
4627 { "Qbtrace:off", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_off },
4628 { "Qbtrace:bts", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_bts },
4629 { "Qbtrace:pt", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_pt },
4630 { "qXfer:btrace:read", PACKET_DISABLE, remote_supported_packet,
4631 PACKET_qXfer_btrace },
4632 { "qXfer:btrace-conf:read", PACKET_DISABLE, remote_supported_packet,
4633 PACKET_qXfer_btrace_conf },
4634 { "Qbtrace-conf:bts:size", PACKET_DISABLE, remote_supported_packet,
4635 PACKET_Qbtrace_conf_bts_size },
4636 { "swbreak", PACKET_DISABLE, remote_supported_packet, PACKET_swbreak_feature },
4637 { "hwbreak", PACKET_DISABLE, remote_supported_packet, PACKET_hwbreak_feature },
4638 { "fork-events", PACKET_DISABLE, remote_supported_packet,
4639 PACKET_fork_event_feature },
4640 { "vfork-events", PACKET_DISABLE, remote_supported_packet,
4641 PACKET_vfork_event_feature },
4642 { "exec-events", PACKET_DISABLE, remote_supported_packet,
4643 PACKET_exec_event_feature },
4644 { "Qbtrace-conf:pt:size", PACKET_DISABLE, remote_supported_packet,
4645 PACKET_Qbtrace_conf_pt_size },
4646 { "vContSupported", PACKET_DISABLE, remote_supported_packet, PACKET_vContSupported },
4647 { "QThreadEvents", PACKET_DISABLE, remote_supported_packet, PACKET_QThreadEvents },
4648 { "no-resumed", PACKET_DISABLE, remote_supported_packet, PACKET_no_resumed },
4651 static char *remote_support_xml;
4653 /* Register string appended to "xmlRegisters=" in qSupported query. */
4656 register_remote_support_xml (const char *xml)
4658 #if defined(HAVE_LIBEXPAT)
4659 if (remote_support_xml == NULL)
4660 remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL);
4663 char *copy = xstrdup (remote_support_xml + 13);
4664 char *p = strtok (copy, ",");
4668 if (strcmp (p, xml) == 0)
4675 while ((p = strtok (NULL, ",")) != NULL);
4678 remote_support_xml = reconcat (remote_support_xml,
4679 remote_support_xml, ",", xml,
4686 remote_query_supported_append (char *msg, const char *append)
4689 return reconcat (msg, msg, ";", append, (char *) NULL);
4691 return xstrdup (append);
4695 remote_query_supported (void)
4697 struct remote_state *rs = get_remote_state ();
4700 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
4702 /* The packet support flags are handled differently for this packet
4703 than for most others. We treat an error, a disabled packet, and
4704 an empty response identically: any features which must be reported
4705 to be used will be automatically disabled. An empty buffer
4706 accomplishes this, since that is also the representation for a list
4707 containing no features. */
4710 if (packet_support (PACKET_qSupported) != PACKET_DISABLE)
4713 struct cleanup *old_chain = make_cleanup (free_current_contents, &q);
4715 if (packet_set_cmd_state (PACKET_multiprocess_feature) != AUTO_BOOLEAN_FALSE)
4716 q = remote_query_supported_append (q, "multiprocess+");
4718 if (packet_set_cmd_state (PACKET_swbreak_feature) != AUTO_BOOLEAN_FALSE)
4719 q = remote_query_supported_append (q, "swbreak+");
4720 if (packet_set_cmd_state (PACKET_hwbreak_feature) != AUTO_BOOLEAN_FALSE)
4721 q = remote_query_supported_append (q, "hwbreak+");
4723 q = remote_query_supported_append (q, "qRelocInsn+");
4725 if (packet_set_cmd_state (PACKET_fork_event_feature)
4726 != AUTO_BOOLEAN_FALSE)
4727 q = remote_query_supported_append (q, "fork-events+");
4728 if (packet_set_cmd_state (PACKET_vfork_event_feature)
4729 != AUTO_BOOLEAN_FALSE)
4730 q = remote_query_supported_append (q, "vfork-events+");
4731 if (packet_set_cmd_state (PACKET_exec_event_feature)
4732 != AUTO_BOOLEAN_FALSE)
4733 q = remote_query_supported_append (q, "exec-events+");
4735 if (packet_set_cmd_state (PACKET_vContSupported) != AUTO_BOOLEAN_FALSE)
4736 q = remote_query_supported_append (q, "vContSupported+");
4738 if (packet_set_cmd_state (PACKET_QThreadEvents) != AUTO_BOOLEAN_FALSE)
4739 q = remote_query_supported_append (q, "QThreadEvents+");
4741 if (packet_set_cmd_state (PACKET_no_resumed) != AUTO_BOOLEAN_FALSE)
4742 q = remote_query_supported_append (q, "no-resumed+");
4744 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4745 the qSupported:xmlRegisters=i386 handling. */
4746 if (remote_support_xml != NULL)
4747 q = remote_query_supported_append (q, remote_support_xml);
4749 q = reconcat (q, "qSupported:", q, (char *) NULL);
4752 do_cleanups (old_chain);
4754 getpkt (&rs->buf, &rs->buf_size, 0);
4756 /* If an error occured, warn, but do not return - just reset the
4757 buffer to empty and go on to disable features. */
4758 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
4761 warning (_("Remote failure reply: %s"), rs->buf);
4766 memset (seen, 0, sizeof (seen));
4771 enum packet_support is_supported;
4772 char *p, *end, *name_end, *value;
4774 /* First separate out this item from the rest of the packet. If
4775 there's another item after this, we overwrite the separator
4776 (terminated strings are much easier to work with). */
4778 end = strchr (p, ';');
4781 end = p + strlen (p);
4791 warning (_("empty item in \"qSupported\" response"));
4796 name_end = strchr (p, '=');
4799 /* This is a name=value entry. */
4800 is_supported = PACKET_ENABLE;
4801 value = name_end + 1;
4810 is_supported = PACKET_ENABLE;
4814 is_supported = PACKET_DISABLE;
4818 is_supported = PACKET_SUPPORT_UNKNOWN;
4822 warning (_("unrecognized item \"%s\" "
4823 "in \"qSupported\" response"), p);
4829 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4830 if (strcmp (remote_protocol_features[i].name, p) == 0)
4832 const struct protocol_feature *feature;
4835 feature = &remote_protocol_features[i];
4836 feature->func (feature, is_supported, value);
4841 /* If we increased the packet size, make sure to increase the global
4842 buffer size also. We delay this until after parsing the entire
4843 qSupported packet, because this is the same buffer we were
4845 if (rs->buf_size < rs->explicit_packet_size)
4847 rs->buf_size = rs->explicit_packet_size;
4848 rs->buf = (char *) xrealloc (rs->buf, rs->buf_size);
4851 /* Handle the defaults for unmentioned features. */
4852 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4855 const struct protocol_feature *feature;
4857 feature = &remote_protocol_features[i];
4858 feature->func (feature, feature->default_support, NULL);
4862 /* Serial QUIT handler for the remote serial descriptor.
4864 Defers handling a Ctrl-C until we're done with the current
4865 command/response packet sequence, unless:
4867 - We're setting up the connection. Don't send a remote interrupt
4868 request, as we're not fully synced yet. Quit immediately
4871 - The target has been resumed in the foreground
4872 (target_terminal_is_ours is false) with a synchronous resume
4873 packet, and we're blocked waiting for the stop reply, thus a
4874 Ctrl-C should be immediately sent to the target.
4876 - We get a second Ctrl-C while still within the same serial read or
4877 write. In that case the serial is seemingly wedged --- offer to
4880 - We see a second Ctrl-C without target response, after having
4881 previously interrupted the target. In that case the target/stub
4882 is probably wedged --- offer to quit/disconnect.
4886 remote_serial_quit_handler (void)
4888 struct remote_state *rs = get_remote_state ();
4890 if (check_quit_flag ())
4892 /* If we're starting up, we're not fully synced yet. Quit
4894 if (rs->starting_up)
4896 else if (rs->got_ctrlc_during_io)
4898 if (query (_("The target is not responding to GDB commands.\n"
4899 "Stop debugging it? ")))
4900 remote_unpush_and_throw ();
4902 /* If ^C has already been sent once, offer to disconnect. */
4903 else if (!target_terminal_is_ours () && rs->ctrlc_pending_p)
4905 /* All-stop protocol, and blocked waiting for stop reply. Send
4906 an interrupt request. */
4907 else if (!target_terminal_is_ours () && rs->waiting_for_stop_reply)
4908 target_interrupt (inferior_ptid);
4910 rs->got_ctrlc_during_io = 1;
4914 /* Remove any of the remote.c targets from target stack. Upper targets depend
4915 on it so remove them first. */
4918 remote_unpush_target (void)
4920 pop_all_targets_at_and_above (process_stratum);
4924 remote_unpush_and_throw (void)
4926 remote_unpush_target ();
4927 throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target."));
4931 remote_open_1 (const char *name, int from_tty,
4932 struct target_ops *target, int extended_p)
4934 struct remote_state *rs = get_remote_state ();
4937 error (_("To open a remote debug connection, you need to specify what\n"
4938 "serial device is attached to the remote system\n"
4939 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4941 /* See FIXME above. */
4942 if (!target_async_permitted)
4943 wait_forever_enabled_p = 1;
4945 /* If we're connected to a running target, target_preopen will kill it.
4946 Ask this question first, before target_preopen has a chance to kill
4948 if (rs->remote_desc != NULL && !have_inferiors ())
4951 && !query (_("Already connected to a remote target. Disconnect? ")))
4952 error (_("Still connected."));
4955 /* Here the possibly existing remote target gets unpushed. */
4956 target_preopen (from_tty);
4958 /* Make sure we send the passed signals list the next time we resume. */
4959 xfree (rs->last_pass_packet);
4960 rs->last_pass_packet = NULL;
4962 /* Make sure we send the program signals list the next time we
4964 xfree (rs->last_program_signals_packet);
4965 rs->last_program_signals_packet = NULL;
4967 remote_fileio_reset ();
4968 reopen_exec_file ();
4971 rs->remote_desc = remote_serial_open (name);
4972 if (!rs->remote_desc)
4973 perror_with_name (name);
4975 if (baud_rate != -1)
4977 if (serial_setbaudrate (rs->remote_desc, baud_rate))
4979 /* The requested speed could not be set. Error out to
4980 top level after closing remote_desc. Take care to
4981 set remote_desc to NULL to avoid closing remote_desc
4983 serial_close (rs->remote_desc);
4984 rs->remote_desc = NULL;
4985 perror_with_name (name);
4989 serial_setparity (rs->remote_desc, serial_parity);
4990 serial_raw (rs->remote_desc);
4992 /* If there is something sitting in the buffer we might take it as a
4993 response to a command, which would be bad. */
4994 serial_flush_input (rs->remote_desc);
4998 puts_filtered ("Remote debugging using ");
4999 puts_filtered (name);
5000 puts_filtered ("\n");
5002 push_target (target); /* Switch to using remote target now. */
5004 /* Register extra event sources in the event loop. */
5005 remote_async_inferior_event_token
5006 = create_async_event_handler (remote_async_inferior_event_handler,
5008 rs->notif_state = remote_notif_state_allocate ();
5010 /* Reset the target state; these things will be queried either by
5011 remote_query_supported or as they are needed. */
5012 reset_all_packet_configs_support ();
5013 rs->cached_wait_status = 0;
5014 rs->explicit_packet_size = 0;
5016 rs->extended = extended_p;
5017 rs->waiting_for_stop_reply = 0;
5018 rs->ctrlc_pending_p = 0;
5019 rs->got_ctrlc_during_io = 0;
5021 rs->general_thread = not_sent_ptid;
5022 rs->continue_thread = not_sent_ptid;
5023 rs->remote_traceframe_number = -1;
5025 rs->last_resume_exec_dir = EXEC_FORWARD;
5027 /* Probe for ability to use "ThreadInfo" query, as required. */
5028 rs->use_threadinfo_query = 1;
5029 rs->use_threadextra_query = 1;
5031 readahead_cache_invalidate ();
5033 /* Start out by owning the terminal. */
5034 remote_async_terminal_ours_p = 1;
5036 if (target_async_permitted)
5038 /* FIXME: cagney/1999-09-23: During the initial connection it is
5039 assumed that the target is already ready and able to respond to
5040 requests. Unfortunately remote_start_remote() eventually calls
5041 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5042 around this. Eventually a mechanism that allows
5043 wait_for_inferior() to expect/get timeouts will be
5045 wait_forever_enabled_p = 0;
5048 /* First delete any symbols previously loaded from shared libraries. */
5049 no_shared_libraries (NULL, 0);
5052 init_thread_list ();
5054 /* Start the remote connection. If error() or QUIT, discard this
5055 target (we'd otherwise be in an inconsistent state) and then
5056 propogate the error on up the exception chain. This ensures that
5057 the caller doesn't stumble along blindly assuming that the
5058 function succeeded. The CLI doesn't have this problem but other
5059 UI's, such as MI do.
5061 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5062 this function should return an error indication letting the
5063 caller restore the previous state. Unfortunately the command
5064 ``target remote'' is directly wired to this function making that
5065 impossible. On a positive note, the CLI side of this problem has
5066 been fixed - the function set_cmd_context() makes it possible for
5067 all the ``target ....'' commands to share a common callback
5068 function. See cli-dump.c. */
5073 remote_start_remote (from_tty, target, extended_p);
5075 CATCH (ex, RETURN_MASK_ALL)
5077 /* Pop the partially set up target - unless something else did
5078 already before throwing the exception. */
5079 if (rs->remote_desc != NULL)
5080 remote_unpush_target ();
5081 if (target_async_permitted)
5082 wait_forever_enabled_p = 1;
5083 throw_exception (ex);
5088 remote_btrace_reset ();
5090 if (target_async_permitted)
5091 wait_forever_enabled_p = 1;
5094 /* Detach the specified process. */
5097 remote_detach_pid (int pid)
5099 struct remote_state *rs = get_remote_state ();
5101 if (remote_multi_process_p (rs))
5102 xsnprintf (rs->buf, get_remote_packet_size (), "D;%x", pid);
5104 strcpy (rs->buf, "D");
5107 getpkt (&rs->buf, &rs->buf_size, 0);
5109 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
5111 else if (rs->buf[0] == '\0')
5112 error (_("Remote doesn't know how to detach"));
5114 error (_("Can't detach process."));
5117 /* This detaches a program to which we previously attached, using
5118 inferior_ptid to identify the process. After this is done, GDB
5119 can be used to debug some other program. We better not have left
5120 any breakpoints in the target program or it'll die when it hits
5124 remote_detach_1 (const char *args, int from_tty)
5126 int pid = ptid_get_pid (inferior_ptid);
5127 struct remote_state *rs = get_remote_state ();
5128 struct thread_info *tp = find_thread_ptid (inferior_ptid);
5132 error (_("Argument given to \"detach\" when remotely debugging."));
5134 if (!target_has_execution)
5135 error (_("No process to detach from."));
5139 char *exec_file = get_exec_file (0);
5140 if (exec_file == NULL)
5142 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
5143 target_pid_to_str (pid_to_ptid (pid)));
5144 gdb_flush (gdb_stdout);
5147 /* Tell the remote target to detach. */
5148 remote_detach_pid (pid);
5150 /* Exit only if this is the only active inferior. */
5151 if (from_tty && !rs->extended && number_of_live_inferiors () == 1)
5152 puts_filtered (_("Ending remote debugging.\n"));
5154 /* Check to see if we are detaching a fork parent. Note that if we
5155 are detaching a fork child, tp == NULL. */
5156 is_fork_parent = (tp != NULL
5157 && tp->pending_follow.kind == TARGET_WAITKIND_FORKED);
5159 /* If doing detach-on-fork, we don't mourn, because that will delete
5160 breakpoints that should be available for the followed inferior. */
5161 if (!is_fork_parent)
5162 target_mourn_inferior ();
5165 inferior_ptid = null_ptid;
5166 detach_inferior (pid);
5171 remote_detach (struct target_ops *ops, const char *args, int from_tty)
5173 remote_detach_1 (args, from_tty);
5177 extended_remote_detach (struct target_ops *ops, const char *args, int from_tty)
5179 remote_detach_1 (args, from_tty);
5182 /* Target follow-fork function for remote targets. On entry, and
5183 at return, the current inferior is the fork parent.
5185 Note that although this is currently only used for extended-remote,
5186 it is named remote_follow_fork in anticipation of using it for the
5187 remote target as well. */
5190 remote_follow_fork (struct target_ops *ops, int follow_child,
5193 struct remote_state *rs = get_remote_state ();
5194 enum target_waitkind kind = inferior_thread ()->pending_follow.kind;
5196 if ((kind == TARGET_WAITKIND_FORKED && remote_fork_event_p (rs))
5197 || (kind == TARGET_WAITKIND_VFORKED && remote_vfork_event_p (rs)))
5199 /* When following the parent and detaching the child, we detach
5200 the child here. For the case of following the child and
5201 detaching the parent, the detach is done in the target-
5202 independent follow fork code in infrun.c. We can't use
5203 target_detach when detaching an unfollowed child because
5204 the client side doesn't know anything about the child. */
5205 if (detach_fork && !follow_child)
5207 /* Detach the fork child. */
5211 child_ptid = inferior_thread ()->pending_follow.value.related_pid;
5212 child_pid = ptid_get_pid (child_ptid);
5214 remote_detach_pid (child_pid);
5215 detach_inferior (child_pid);
5221 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5222 in the program space of the new inferior. On entry and at return the
5223 current inferior is the exec'ing inferior. INF is the new exec'd
5224 inferior, which may be the same as the exec'ing inferior unless
5225 follow-exec-mode is "new". */
5228 remote_follow_exec (struct target_ops *ops,
5229 struct inferior *inf, char *execd_pathname)
5231 /* We know that this is a target file name, so if it has the "target:"
5232 prefix we strip it off before saving it in the program space. */
5233 if (is_target_filename (execd_pathname))
5234 execd_pathname += strlen (TARGET_SYSROOT_PREFIX);
5236 set_pspace_remote_exec_file (inf->pspace, execd_pathname);
5239 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5242 remote_disconnect (struct target_ops *target, const char *args, int from_tty)
5245 error (_("Argument given to \"disconnect\" when remotely debugging."));
5247 /* Make sure we unpush even the extended remote targets. Calling
5248 target_mourn_inferior won't unpush, and remote_mourn won't
5249 unpush if there is more than one inferior left. */
5250 unpush_target (target);
5251 generic_mourn_inferior ();
5254 puts_filtered ("Ending remote debugging.\n");
5257 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5258 be chatty about it. */
5261 extended_remote_attach (struct target_ops *target, const char *args,
5264 struct remote_state *rs = get_remote_state ();
5266 char *wait_status = NULL;
5268 pid = parse_pid_to_attach (args);
5270 /* Remote PID can be freely equal to getpid, do not check it here the same
5271 way as in other targets. */
5273 if (packet_support (PACKET_vAttach) == PACKET_DISABLE)
5274 error (_("This target does not support attaching to a process"));
5278 char *exec_file = get_exec_file (0);
5281 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
5282 target_pid_to_str (pid_to_ptid (pid)));
5284 printf_unfiltered (_("Attaching to %s\n"),
5285 target_pid_to_str (pid_to_ptid (pid)));
5287 gdb_flush (gdb_stdout);
5290 xsnprintf (rs->buf, get_remote_packet_size (), "vAttach;%x", pid);
5292 getpkt (&rs->buf, &rs->buf_size, 0);
5294 switch (packet_ok (rs->buf,
5295 &remote_protocol_packets[PACKET_vAttach]))
5298 if (!target_is_non_stop_p ())
5300 /* Save the reply for later. */
5301 wait_status = (char *) alloca (strlen (rs->buf) + 1);
5302 strcpy (wait_status, rs->buf);
5304 else if (strcmp (rs->buf, "OK") != 0)
5305 error (_("Attaching to %s failed with: %s"),
5306 target_pid_to_str (pid_to_ptid (pid)),
5309 case PACKET_UNKNOWN:
5310 error (_("This target does not support attaching to a process"));
5312 error (_("Attaching to %s failed"),
5313 target_pid_to_str (pid_to_ptid (pid)));
5316 set_current_inferior (remote_add_inferior (0, pid, 1, 0));
5318 inferior_ptid = pid_to_ptid (pid);
5320 if (target_is_non_stop_p ())
5322 struct thread_info *thread;
5324 /* Get list of threads. */
5325 remote_update_thread_list (target);
5327 thread = first_thread_of_process (pid);
5329 inferior_ptid = thread->ptid;
5331 inferior_ptid = pid_to_ptid (pid);
5333 /* Invalidate our notion of the remote current thread. */
5334 record_currthread (rs, minus_one_ptid);
5338 /* Now, if we have thread information, update inferior_ptid. */
5339 inferior_ptid = remote_current_thread (inferior_ptid);
5341 /* Add the main thread to the thread list. */
5342 add_thread_silent (inferior_ptid);
5345 /* Next, if the target can specify a description, read it. We do
5346 this before anything involving memory or registers. */
5347 target_find_description ();
5349 if (!target_is_non_stop_p ())
5351 /* Use the previously fetched status. */
5352 gdb_assert (wait_status != NULL);
5354 if (target_can_async_p ())
5356 struct notif_event *reply
5357 = remote_notif_parse (¬if_client_stop, wait_status);
5359 push_stop_reply ((struct stop_reply *) reply);
5365 gdb_assert (wait_status != NULL);
5366 strcpy (rs->buf, wait_status);
5367 rs->cached_wait_status = 1;
5371 gdb_assert (wait_status == NULL);
5374 /* Implementation of the to_post_attach method. */
5377 extended_remote_post_attach (struct target_ops *ops, int pid)
5379 /* Get text, data & bss offsets. */
5382 /* In certain cases GDB might not have had the chance to start
5383 symbol lookup up until now. This could happen if the debugged
5384 binary is not using shared libraries, the vsyscall page is not
5385 present (on Linux) and the binary itself hadn't changed since the
5386 debugging process was started. */
5387 if (symfile_objfile != NULL)
5388 remote_check_symbols();
5392 /* Check for the availability of vCont. This function should also check
5396 remote_vcont_probe (struct remote_state *rs)
5400 strcpy (rs->buf, "vCont?");
5402 getpkt (&rs->buf, &rs->buf_size, 0);
5405 /* Make sure that the features we assume are supported. */
5406 if (startswith (buf, "vCont"))
5409 int support_c, support_C;
5411 rs->supports_vCont.s = 0;
5412 rs->supports_vCont.S = 0;
5415 rs->supports_vCont.t = 0;
5416 rs->supports_vCont.r = 0;
5417 while (p && *p == ';')
5420 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
5421 rs->supports_vCont.s = 1;
5422 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
5423 rs->supports_vCont.S = 1;
5424 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
5426 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
5428 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
5429 rs->supports_vCont.t = 1;
5430 else if (*p == 'r' && (*(p + 1) == ';' || *(p + 1) == 0))
5431 rs->supports_vCont.r = 1;
5433 p = strchr (p, ';');
5436 /* If c, and C are not all supported, we can't use vCont. Clearing
5437 BUF will make packet_ok disable the packet. */
5438 if (!support_c || !support_C)
5442 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
5445 /* Helper function for building "vCont" resumptions. Write a
5446 resumption to P. ENDP points to one-passed-the-end of the buffer
5447 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5448 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5449 resumed thread should be single-stepped and/or signalled. If PTID
5450 equals minus_one_ptid, then all threads are resumed; if PTID
5451 represents a process, then all threads of the process are resumed;
5452 the thread to be stepped and/or signalled is given in the global
5456 append_resumption (char *p, char *endp,
5457 ptid_t ptid, int step, enum gdb_signal siggnal)
5459 struct remote_state *rs = get_remote_state ();
5461 if (step && siggnal != GDB_SIGNAL_0)
5462 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
5464 /* GDB is willing to range step. */
5465 && use_range_stepping
5466 /* Target supports range stepping. */
5467 && rs->supports_vCont.r
5468 /* We don't currently support range stepping multiple
5469 threads with a wildcard (though the protocol allows it,
5470 so stubs shouldn't make an active effort to forbid
5472 && !(remote_multi_process_p (rs) && ptid_is_pid (ptid)))
5474 struct thread_info *tp;
5476 if (ptid_equal (ptid, minus_one_ptid))
5478 /* If we don't know about the target thread's tid, then
5479 we're resuming magic_null_ptid (see caller). */
5480 tp = find_thread_ptid (magic_null_ptid);
5483 tp = find_thread_ptid (ptid);
5484 gdb_assert (tp != NULL);
5486 if (tp->control.may_range_step)
5488 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
5490 p += xsnprintf (p, endp - p, ";r%s,%s",
5491 phex_nz (tp->control.step_range_start,
5493 phex_nz (tp->control.step_range_end,
5497 p += xsnprintf (p, endp - p, ";s");
5500 p += xsnprintf (p, endp - p, ";s");
5501 else if (siggnal != GDB_SIGNAL_0)
5502 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
5504 p += xsnprintf (p, endp - p, ";c");
5506 if (remote_multi_process_p (rs) && ptid_is_pid (ptid))
5510 /* All (-1) threads of process. */
5511 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
5513 p += xsnprintf (p, endp - p, ":");
5514 p = write_ptid (p, endp, nptid);
5516 else if (!ptid_equal (ptid, minus_one_ptid))
5518 p += xsnprintf (p, endp - p, ":");
5519 p = write_ptid (p, endp, ptid);
5525 /* Clear the thread's private info on resume. */
5528 resume_clear_thread_private_info (struct thread_info *thread)
5530 if (thread->priv != NULL)
5532 thread->priv->stop_reason = TARGET_STOPPED_BY_NO_REASON;
5533 thread->priv->watch_data_address = 0;
5537 /* Append a vCont continue-with-signal action for threads that have a
5538 non-zero stop signal. */
5541 append_pending_thread_resumptions (char *p, char *endp, ptid_t ptid)
5543 struct thread_info *thread;
5545 ALL_NON_EXITED_THREADS (thread)
5546 if (ptid_match (thread->ptid, ptid)
5547 && !ptid_equal (inferior_ptid, thread->ptid)
5548 && thread->suspend.stop_signal != GDB_SIGNAL_0)
5550 p = append_resumption (p, endp, thread->ptid,
5551 0, thread->suspend.stop_signal);
5552 thread->suspend.stop_signal = GDB_SIGNAL_0;
5553 resume_clear_thread_private_info (thread);
5559 /* Resume the remote inferior by using a "vCont" packet. The thread
5560 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5561 resumed thread should be single-stepped and/or signalled. If PTID
5562 equals minus_one_ptid, then all threads are resumed; the thread to
5563 be stepped and/or signalled is given in the global INFERIOR_PTID.
5564 This function returns non-zero iff it resumes the inferior.
5566 This function issues a strict subset of all possible vCont commands at the
5570 remote_vcont_resume (ptid_t ptid, int step, enum gdb_signal siggnal)
5572 struct remote_state *rs = get_remote_state ();
5576 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
5577 remote_vcont_probe (rs);
5579 if (packet_support (PACKET_vCont) == PACKET_DISABLE)
5583 endp = rs->buf + get_remote_packet_size ();
5585 /* If we could generate a wider range of packets, we'd have to worry
5586 about overflowing BUF. Should there be a generic
5587 "multi-part-packet" packet? */
5589 p += xsnprintf (p, endp - p, "vCont");
5591 if (ptid_equal (ptid, magic_null_ptid))
5593 /* MAGIC_NULL_PTID means that we don't have any active threads,
5594 so we don't have any TID numbers the inferior will
5595 understand. Make sure to only send forms that do not specify
5597 append_resumption (p, endp, minus_one_ptid, step, siggnal);
5599 else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
5601 /* Resume all threads (of all processes, or of a single
5602 process), with preference for INFERIOR_PTID. This assumes
5603 inferior_ptid belongs to the set of all threads we are about
5605 if (step || siggnal != GDB_SIGNAL_0)
5607 /* Step inferior_ptid, with or without signal. */
5608 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
5611 /* Also pass down any pending signaled resumption for other
5612 threads not the current. */
5613 p = append_pending_thread_resumptions (p, endp, ptid);
5615 /* And continue others without a signal. */
5616 append_resumption (p, endp, ptid, /*step=*/ 0, GDB_SIGNAL_0);
5620 /* Scheduler locking; resume only PTID. */
5621 append_resumption (p, endp, ptid, step, siggnal);
5624 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
5627 if (target_is_non_stop_p ())
5629 /* In non-stop, the stub replies to vCont with "OK". The stop
5630 reply will be reported asynchronously by means of a `%Stop'
5632 getpkt (&rs->buf, &rs->buf_size, 0);
5633 if (strcmp (rs->buf, "OK") != 0)
5634 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
5640 /* Tell the remote machine to resume. */
5643 remote_resume (struct target_ops *ops,
5644 ptid_t ptid, int step, enum gdb_signal siggnal)
5646 struct remote_state *rs = get_remote_state ();
5648 struct thread_info *thread;
5650 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5651 (explained in remote-notif.c:handle_notification) so
5652 remote_notif_process is not called. We need find a place where
5653 it is safe to start a 'vNotif' sequence. It is good to do it
5654 before resuming inferior, because inferior was stopped and no RSP
5655 traffic at that moment. */
5656 if (!target_is_non_stop_p ())
5657 remote_notif_process (rs->notif_state, ¬if_client_stop);
5659 rs->last_sent_signal = siggnal;
5660 rs->last_sent_step = step;
5662 rs->last_resume_exec_dir = execution_direction;
5664 /* The vCont packet doesn't need to specify threads via Hc. */
5665 /* No reverse support (yet) for vCont. */
5666 if (execution_direction != EXEC_REVERSE)
5667 if (remote_vcont_resume (ptid, step, siggnal))
5670 /* All other supported resume packets do use Hc, so set the continue
5672 if (ptid_equal (ptid, minus_one_ptid))
5673 set_continue_thread (any_thread_ptid);
5675 set_continue_thread (ptid);
5677 ALL_NON_EXITED_THREADS (thread)
5678 resume_clear_thread_private_info (thread);
5681 if (execution_direction == EXEC_REVERSE)
5683 /* We don't pass signals to the target in reverse exec mode. */
5684 if (info_verbose && siggnal != GDB_SIGNAL_0)
5685 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5688 if (step && packet_support (PACKET_bs) == PACKET_DISABLE)
5689 error (_("Remote reverse-step not supported."));
5690 if (!step && packet_support (PACKET_bc) == PACKET_DISABLE)
5691 error (_("Remote reverse-continue not supported."));
5693 strcpy (buf, step ? "bs" : "bc");
5695 else if (siggnal != GDB_SIGNAL_0)
5697 buf[0] = step ? 'S' : 'C';
5698 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
5699 buf[2] = tohex (((int) siggnal) & 0xf);
5703 strcpy (buf, step ? "s" : "c");
5708 /* We are about to start executing the inferior, let's register it
5709 with the event loop. NOTE: this is the one place where all the
5710 execution commands end up. We could alternatively do this in each
5711 of the execution commands in infcmd.c. */
5712 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5713 into infcmd.c in order to allow inferior function calls to work
5714 NOT asynchronously. */
5715 if (target_can_async_p ())
5718 /* We've just told the target to resume. The remote server will
5719 wait for the inferior to stop, and then send a stop reply. In
5720 the mean time, we can't start another command/query ourselves
5721 because the stub wouldn't be ready to process it. This applies
5722 only to the base all-stop protocol, however. In non-stop (which
5723 only supports vCont), the stub replies with an "OK", and is
5724 immediate able to process further serial input. */
5725 if (!target_is_non_stop_p ())
5726 rs->waiting_for_stop_reply = 1;
5730 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
5731 thread, all threads of a remote process, or all threads of all
5735 remote_stop_ns (ptid_t ptid)
5737 struct remote_state *rs = get_remote_state ();
5739 char *endp = rs->buf + get_remote_packet_size ();
5741 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
5742 remote_vcont_probe (rs);
5744 if (!rs->supports_vCont.t)
5745 error (_("Remote server does not support stopping threads"));
5747 if (ptid_equal (ptid, minus_one_ptid)
5748 || (!remote_multi_process_p (rs) && ptid_is_pid (ptid)))
5749 p += xsnprintf (p, endp - p, "vCont;t");
5754 p += xsnprintf (p, endp - p, "vCont;t:");
5756 if (ptid_is_pid (ptid))
5757 /* All (-1) threads of process. */
5758 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
5761 /* Small optimization: if we already have a stop reply for
5762 this thread, no use in telling the stub we want this
5764 if (peek_stop_reply (ptid))
5770 write_ptid (p, endp, nptid);
5773 /* In non-stop, we get an immediate OK reply. The stop reply will
5774 come in asynchronously by notification. */
5776 getpkt (&rs->buf, &rs->buf_size, 0);
5777 if (strcmp (rs->buf, "OK") != 0)
5778 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
5781 /* All-stop version of target_interrupt. Sends a break or a ^C to
5782 interrupt the remote target. It is undefined which thread of which
5783 process reports the interrupt. */
5786 remote_interrupt_as (void)
5788 struct remote_state *rs = get_remote_state ();
5790 rs->ctrlc_pending_p = 1;
5792 /* If the inferior is stopped already, but the core didn't know
5793 about it yet, just ignore the request. The cached wait status
5794 will be collected in remote_wait. */
5795 if (rs->cached_wait_status)
5798 /* Send interrupt_sequence to remote target. */
5799 send_interrupt_sequence ();
5802 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
5803 the remote target. It is undefined which thread of which process
5804 reports the interrupt. Throws an error if the packet is not
5805 supported by the server. */
5808 remote_interrupt_ns (void)
5810 struct remote_state *rs = get_remote_state ();
5812 char *endp = rs->buf + get_remote_packet_size ();
5814 xsnprintf (p, endp - p, "vCtrlC");
5816 /* In non-stop, we get an immediate OK reply. The stop reply will
5817 come in asynchronously by notification. */
5819 getpkt (&rs->buf, &rs->buf_size, 0);
5821 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vCtrlC]))
5825 case PACKET_UNKNOWN:
5826 error (_("No support for interrupting the remote target."));
5828 error (_("Interrupting target failed: %s"), rs->buf);
5832 /* Implement the to_stop function for the remote targets. */
5835 remote_stop (struct target_ops *self, ptid_t ptid)
5838 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
5840 if (target_is_non_stop_p ())
5841 remote_stop_ns (ptid);
5844 /* We don't currently have a way to transparently pause the
5845 remote target in all-stop mode. Interrupt it instead. */
5846 remote_interrupt_as ();
5850 /* Implement the to_interrupt function for the remote targets. */
5853 remote_interrupt (struct target_ops *self, ptid_t ptid)
5855 struct remote_state *rs = get_remote_state ();
5858 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
5860 if (target_is_non_stop_p ())
5861 remote_interrupt_ns ();
5863 remote_interrupt_as ();
5866 /* Implement the to_pass_ctrlc function for the remote targets. */
5869 remote_pass_ctrlc (struct target_ops *self)
5871 struct remote_state *rs = get_remote_state ();
5874 fprintf_unfiltered (gdb_stdlog, "remote_pass_ctrlc called\n");
5876 /* If we're starting up, we're not fully synced yet. Quit
5878 if (rs->starting_up)
5880 /* If ^C has already been sent once, offer to disconnect. */
5881 else if (rs->ctrlc_pending_p)
5884 target_interrupt (inferior_ptid);
5887 /* Ask the user what to do when an interrupt is received. */
5890 interrupt_query (void)
5892 struct remote_state *rs = get_remote_state ();
5894 if (rs->waiting_for_stop_reply && rs->ctrlc_pending_p)
5896 if (query (_("The target is not responding to interrupt requests.\n"
5897 "Stop debugging it? ")))
5899 remote_unpush_target ();
5900 throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target."));
5905 if (query (_("Interrupted while waiting for the program.\n"
5906 "Give up waiting? ")))
5911 /* Enable/disable target terminal ownership. Most targets can use
5912 terminal groups to control terminal ownership. Remote targets are
5913 different in that explicit transfer of ownership to/from GDB/target
5917 remote_terminal_inferior (struct target_ops *self)
5919 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
5920 idempotent. The event-loop GDB talking to an asynchronous target
5921 with a synchronous command calls this function from both
5922 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
5923 transfer the terminal to the target when it shouldn't this guard
5925 if (!remote_async_terminal_ours_p)
5927 delete_file_handler (input_fd);
5928 remote_async_terminal_ours_p = 0;
5929 /* NOTE: At this point we could also register our selves as the
5930 recipient of all input. Any characters typed could then be
5931 passed on down to the target. */
5935 remote_terminal_ours (struct target_ops *self)
5937 /* See FIXME in remote_terminal_inferior. */
5938 if (remote_async_terminal_ours_p)
5940 add_file_handler (input_fd, stdin_event_handler, 0);
5941 remote_async_terminal_ours_p = 1;
5945 remote_console_output (char *msg)
5949 for (p = msg; p[0] && p[1]; p += 2)
5952 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
5956 fputs_unfiltered (tb, gdb_stdtarg);
5958 gdb_flush (gdb_stdtarg);
5961 typedef struct cached_reg
5964 gdb_byte data[MAX_REGISTER_SIZE];
5967 DEF_VEC_O(cached_reg_t);
5969 typedef struct stop_reply
5971 struct notif_event base;
5973 /* The identifier of the thread about this event */
5976 /* The remote state this event is associated with. When the remote
5977 connection, represented by a remote_state object, is closed,
5978 all the associated stop_reply events should be released. */
5979 struct remote_state *rs;
5981 struct target_waitstatus ws;
5983 /* Expedited registers. This makes remote debugging a bit more
5984 efficient for those targets that provide critical registers as
5985 part of their normal status mechanism (as another roundtrip to
5986 fetch them is avoided). */
5987 VEC(cached_reg_t) *regcache;
5989 enum target_stop_reason stop_reason;
5991 CORE_ADDR watch_data_address;
5996 DECLARE_QUEUE_P (stop_reply_p);
5997 DEFINE_QUEUE_P (stop_reply_p);
5998 /* The list of already fetched and acknowledged stop events. This
5999 queue is used for notification Stop, and other notifications
6000 don't need queue for their events, because the notification events
6001 of Stop can't be consumed immediately, so that events should be
6002 queued first, and be consumed by remote_wait_{ns,as} one per
6003 time. Other notifications can consume their events immediately,
6004 so queue is not needed for them. */
6005 static QUEUE (stop_reply_p) *stop_reply_queue;
6008 stop_reply_xfree (struct stop_reply *r)
6010 notif_event_xfree ((struct notif_event *) r);
6013 /* Return the length of the stop reply queue. */
6016 stop_reply_queue_length (void)
6018 return QUEUE_length (stop_reply_p, stop_reply_queue);
6022 remote_notif_stop_parse (struct notif_client *self, char *buf,
6023 struct notif_event *event)
6025 remote_parse_stop_reply (buf, (struct stop_reply *) event);
6029 remote_notif_stop_ack (struct notif_client *self, char *buf,
6030 struct notif_event *event)
6032 struct stop_reply *stop_reply = (struct stop_reply *) event;
6035 putpkt ((char *) self->ack_command);
6037 if (stop_reply->ws.kind == TARGET_WAITKIND_IGNORE)
6038 /* We got an unknown stop reply. */
6039 error (_("Unknown stop reply"));
6041 push_stop_reply (stop_reply);
6045 remote_notif_stop_can_get_pending_events (struct notif_client *self)
6047 /* We can't get pending events in remote_notif_process for
6048 notification stop, and we have to do this in remote_wait_ns
6049 instead. If we fetch all queued events from stub, remote stub
6050 may exit and we have no chance to process them back in
6052 mark_async_event_handler (remote_async_inferior_event_token);
6057 stop_reply_dtr (struct notif_event *event)
6059 struct stop_reply *r = (struct stop_reply *) event;
6061 VEC_free (cached_reg_t, r->regcache);
6064 static struct notif_event *
6065 remote_notif_stop_alloc_reply (void)
6067 /* We cast to a pointer to the "base class". */
6068 struct notif_event *r = (struct notif_event *) XNEW (struct stop_reply);
6070 r->dtr = stop_reply_dtr;
6075 /* A client of notification Stop. */
6077 struct notif_client notif_client_stop =
6081 remote_notif_stop_parse,
6082 remote_notif_stop_ack,
6083 remote_notif_stop_can_get_pending_events,
6084 remote_notif_stop_alloc_reply,
6088 /* A parameter to pass data in and out. */
6090 struct queue_iter_param
6093 struct stop_reply *output;
6096 /* Determine if THREAD is a pending fork parent thread. ARG contains
6097 the pid of the process that owns the threads we want to check, or
6098 -1 if we want to check all threads. */
6101 is_pending_fork_parent (struct target_waitstatus *ws, int event_pid,
6104 if (ws->kind == TARGET_WAITKIND_FORKED
6105 || ws->kind == TARGET_WAITKIND_VFORKED)
6107 if (event_pid == -1 || event_pid == ptid_get_pid (thread_ptid))
6114 /* Check whether EVENT is a fork event, and if it is, remove the
6115 fork child from the context list passed in DATA. */
6118 remove_child_of_pending_fork (QUEUE (stop_reply_p) *q,
6119 QUEUE_ITER (stop_reply_p) *iter,
6123 struct queue_iter_param *param = (struct queue_iter_param *) data;
6124 struct threads_listing_context *context
6125 = (struct threads_listing_context *) param->input;
6127 if (event->ws.kind == TARGET_WAITKIND_FORKED
6128 || event->ws.kind == TARGET_WAITKIND_VFORKED
6129 || event->ws.kind == TARGET_WAITKIND_THREAD_EXITED)
6130 threads_listing_context_remove (&event->ws, context);
6135 /* If CONTEXT contains any fork child threads that have not been
6136 reported yet, remove them from the CONTEXT list. If such a
6137 thread exists it is because we are stopped at a fork catchpoint
6138 and have not yet called follow_fork, which will set up the
6139 host-side data structures for the new process. */
6142 remove_new_fork_children (struct threads_listing_context *context)
6144 struct thread_info * thread;
6146 struct notif_client *notif = ¬if_client_stop;
6147 struct queue_iter_param param;
6149 /* For any threads stopped at a fork event, remove the corresponding
6150 fork child threads from the CONTEXT list. */
6151 ALL_NON_EXITED_THREADS (thread)
6153 struct target_waitstatus *ws;
6155 if (thread->suspend.waitstatus_pending_p)
6156 ws = &thread->suspend.waitstatus;
6158 ws = &thread->pending_follow;
6160 if (is_pending_fork_parent (ws, pid, thread->ptid))
6162 threads_listing_context_remove (ws, context);
6166 /* Check for any pending fork events (not reported or processed yet)
6167 in process PID and remove those fork child threads from the
6168 CONTEXT list as well. */
6169 remote_notif_get_pending_events (notif);
6170 param.input = context;
6171 param.output = NULL;
6172 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6173 remove_child_of_pending_fork, ¶m);
6176 /* Remove stop replies in the queue if its pid is equal to the given
6180 remove_stop_reply_for_inferior (QUEUE (stop_reply_p) *q,
6181 QUEUE_ITER (stop_reply_p) *iter,
6185 struct queue_iter_param *param = (struct queue_iter_param *) data;
6186 struct inferior *inf = (struct inferior *) param->input;
6188 if (ptid_get_pid (event->ptid) == inf->pid)
6190 stop_reply_xfree (event);
6191 QUEUE_remove_elem (stop_reply_p, q, iter);
6197 /* Discard all pending stop replies of inferior INF. */
6200 discard_pending_stop_replies (struct inferior *inf)
6202 struct queue_iter_param param;
6203 struct stop_reply *reply;
6204 struct remote_state *rs = get_remote_state ();
6205 struct remote_notif_state *rns = rs->notif_state;
6207 /* This function can be notified when an inferior exists. When the
6208 target is not remote, the notification state is NULL. */
6209 if (rs->remote_desc == NULL)
6212 reply = (struct stop_reply *) rns->pending_event[notif_client_stop.id];
6214 /* Discard the in-flight notification. */
6215 if (reply != NULL && ptid_get_pid (reply->ptid) == inf->pid)
6217 stop_reply_xfree (reply);
6218 rns->pending_event[notif_client_stop.id] = NULL;
6222 param.output = NULL;
6223 /* Discard the stop replies we have already pulled with
6225 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6226 remove_stop_reply_for_inferior, ¶m);
6229 /* If its remote state is equal to the given remote state,
6230 remove EVENT from the stop reply queue. */
6233 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p) *q,
6234 QUEUE_ITER (stop_reply_p) *iter,
6238 struct queue_iter_param *param = (struct queue_iter_param *) data;
6239 struct remote_state *rs = (struct remote_state *) param->input;
6241 if (event->rs == rs)
6243 stop_reply_xfree (event);
6244 QUEUE_remove_elem (stop_reply_p, q, iter);
6250 /* Discard the stop replies for RS in stop_reply_queue. */
6253 discard_pending_stop_replies_in_queue (struct remote_state *rs)
6255 struct queue_iter_param param;
6258 param.output = NULL;
6259 /* Discard the stop replies we have already pulled with
6261 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6262 remove_stop_reply_of_remote_state, ¶m);
6265 /* A parameter to pass data in and out. */
6268 remote_notif_remove_once_on_match (QUEUE (stop_reply_p) *q,
6269 QUEUE_ITER (stop_reply_p) *iter,
6273 struct queue_iter_param *param = (struct queue_iter_param *) data;
6274 ptid_t *ptid = (ptid_t *) param->input;
6276 if (ptid_match (event->ptid, *ptid))
6278 param->output = event;
6279 QUEUE_remove_elem (stop_reply_p, q, iter);
6286 /* Remove the first reply in 'stop_reply_queue' which matches
6289 static struct stop_reply *
6290 remote_notif_remove_queued_reply (ptid_t ptid)
6292 struct queue_iter_param param;
6294 param.input = &ptid;
6295 param.output = NULL;
6297 QUEUE_iterate (stop_reply_p, stop_reply_queue,
6298 remote_notif_remove_once_on_match, ¶m);
6300 fprintf_unfiltered (gdb_stdlog,
6301 "notif: discard queued event: 'Stop' in %s\n",
6302 target_pid_to_str (ptid));
6304 return param.output;
6307 /* Look for a queued stop reply belonging to PTID. If one is found,
6308 remove it from the queue, and return it. Returns NULL if none is
6309 found. If there are still queued events left to process, tell the
6310 event loop to get back to target_wait soon. */
6312 static struct stop_reply *
6313 queued_stop_reply (ptid_t ptid)
6315 struct stop_reply *r = remote_notif_remove_queued_reply (ptid);
6317 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
6318 /* There's still at least an event left. */
6319 mark_async_event_handler (remote_async_inferior_event_token);
6324 /* Push a fully parsed stop reply in the stop reply queue. Since we
6325 know that we now have at least one queued event left to pass to the
6326 core side, tell the event loop to get back to target_wait soon. */
6329 push_stop_reply (struct stop_reply *new_event)
6331 QUEUE_enque (stop_reply_p, stop_reply_queue, new_event);
6334 fprintf_unfiltered (gdb_stdlog,
6335 "notif: push 'Stop' %s to queue %d\n",
6336 target_pid_to_str (new_event->ptid),
6337 QUEUE_length (stop_reply_p,
6340 mark_async_event_handler (remote_async_inferior_event_token);
6344 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p) *q,
6345 QUEUE_ITER (stop_reply_p) *iter,
6346 struct stop_reply *event,
6349 ptid_t *ptid = (ptid_t *) data;
6351 return !(ptid_equal (*ptid, event->ptid)
6352 && event->ws.kind == TARGET_WAITKIND_STOPPED);
6355 /* Returns true if we have a stop reply for PTID. */
6358 peek_stop_reply (ptid_t ptid)
6360 return !QUEUE_iterate (stop_reply_p, stop_reply_queue,
6361 stop_reply_match_ptid_and_ws, &ptid);
6364 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6365 starting with P and ending with PEND matches PREFIX. */
6368 strprefix (const char *p, const char *pend, const char *prefix)
6370 for ( ; p < pend; p++, prefix++)
6373 return *prefix == '\0';
6376 /* Parse the stop reply in BUF. Either the function succeeds, and the
6377 result is stored in EVENT, or throws an error. */
6380 remote_parse_stop_reply (char *buf, struct stop_reply *event)
6382 struct remote_arch_state *rsa = get_remote_arch_state ();
6387 event->ptid = null_ptid;
6388 event->rs = get_remote_state ();
6389 event->ws.kind = TARGET_WAITKIND_IGNORE;
6390 event->ws.value.integer = 0;
6391 event->stop_reason = TARGET_STOPPED_BY_NO_REASON;
6392 event->regcache = NULL;
6397 case 'T': /* Status with PC, SP, FP, ... */
6398 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6399 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6401 n... = register number
6402 r... = register contents
6405 p = &buf[3]; /* after Txx */
6411 p1 = strchr (p, ':');
6413 error (_("Malformed packet(a) (missing colon): %s\n\
6417 error (_("Malformed packet(a) (missing register number): %s\n\
6421 /* Some "registers" are actually extended stop information.
6422 Note if you're adding a new entry here: GDB 7.9 and
6423 earlier assume that all register "numbers" that start
6424 with an hex digit are real register numbers. Make sure
6425 the server only sends such a packet if it knows the
6426 client understands it. */
6428 if (strprefix (p, p1, "thread"))
6429 event->ptid = read_ptid (++p1, &p);
6430 else if (strprefix (p, p1, "syscall_entry"))
6434 event->ws.kind = TARGET_WAITKIND_SYSCALL_ENTRY;
6435 p = unpack_varlen_hex (++p1, &sysno);
6436 event->ws.value.syscall_number = (int) sysno;
6438 else if (strprefix (p, p1, "syscall_return"))
6442 event->ws.kind = TARGET_WAITKIND_SYSCALL_RETURN;
6443 p = unpack_varlen_hex (++p1, &sysno);
6444 event->ws.value.syscall_number = (int) sysno;
6446 else if (strprefix (p, p1, "watch")
6447 || strprefix (p, p1, "rwatch")
6448 || strprefix (p, p1, "awatch"))
6450 event->stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
6451 p = unpack_varlen_hex (++p1, &addr);
6452 event->watch_data_address = (CORE_ADDR) addr;
6454 else if (strprefix (p, p1, "swbreak"))
6456 event->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT;
6458 /* Make sure the stub doesn't forget to indicate support
6460 if (packet_support (PACKET_swbreak_feature) != PACKET_ENABLE)
6461 error (_("Unexpected swbreak stop reason"));
6463 /* The value part is documented as "must be empty",
6464 though we ignore it, in case we ever decide to make
6465 use of it in a backward compatible way. */
6466 p = strchrnul (p1 + 1, ';');
6468 else if (strprefix (p, p1, "hwbreak"))
6470 event->stop_reason = TARGET_STOPPED_BY_HW_BREAKPOINT;
6472 /* Make sure the stub doesn't forget to indicate support
6474 if (packet_support (PACKET_hwbreak_feature) != PACKET_ENABLE)
6475 error (_("Unexpected hwbreak stop reason"));
6478 p = strchrnul (p1 + 1, ';');
6480 else if (strprefix (p, p1, "library"))
6482 event->ws.kind = TARGET_WAITKIND_LOADED;
6483 p = strchrnul (p1 + 1, ';');
6485 else if (strprefix (p, p1, "replaylog"))
6487 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
6488 /* p1 will indicate "begin" or "end", but it makes
6489 no difference for now, so ignore it. */
6490 p = strchrnul (p1 + 1, ';');
6492 else if (strprefix (p, p1, "core"))
6496 p = unpack_varlen_hex (++p1, &c);
6499 else if (strprefix (p, p1, "fork"))
6501 event->ws.value.related_pid = read_ptid (++p1, &p);
6502 event->ws.kind = TARGET_WAITKIND_FORKED;
6504 else if (strprefix (p, p1, "vfork"))
6506 event->ws.value.related_pid = read_ptid (++p1, &p);
6507 event->ws.kind = TARGET_WAITKIND_VFORKED;
6509 else if (strprefix (p, p1, "vforkdone"))
6511 event->ws.kind = TARGET_WAITKIND_VFORK_DONE;
6512 p = strchrnul (p1 + 1, ';');
6514 else if (strprefix (p, p1, "exec"))
6517 char pathname[PATH_MAX];
6520 /* Determine the length of the execd pathname. */
6521 p = unpack_varlen_hex (++p1, &ignored);
6522 pathlen = (p - p1) / 2;
6524 /* Save the pathname for event reporting and for
6525 the next run command. */
6526 hex2bin (p1, (gdb_byte *) pathname, pathlen);
6527 pathname[pathlen] = '\0';
6529 /* This is freed during event handling. */
6530 event->ws.value.execd_pathname = xstrdup (pathname);
6531 event->ws.kind = TARGET_WAITKIND_EXECD;
6533 /* Skip the registers included in this packet, since
6534 they may be for an architecture different from the
6535 one used by the original program. */
6538 else if (strprefix (p, p1, "create"))
6540 event->ws.kind = TARGET_WAITKIND_THREAD_CREATED;
6541 p = strchrnul (p1 + 1, ';');
6550 p = strchrnul (p1 + 1, ';');
6555 /* Maybe a real ``P'' register number. */
6556 p_temp = unpack_varlen_hex (p, &pnum);
6557 /* If the first invalid character is the colon, we got a
6558 register number. Otherwise, it's an unknown stop
6562 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
6563 cached_reg_t cached_reg;
6566 error (_("Remote sent bad register number %s: %s\n\
6568 hex_string (pnum), p, buf);
6570 cached_reg.num = reg->regnum;
6573 fieldsize = hex2bin (p, cached_reg.data,
6574 register_size (target_gdbarch (),
6577 if (fieldsize < register_size (target_gdbarch (),
6579 warning (_("Remote reply is too short: %s"), buf);
6581 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
6585 /* Not a number. Silently skip unknown optional
6587 p = strchrnul (p1 + 1, ';');
6592 error (_("Remote register badly formatted: %s\nhere: %s"),
6597 if (event->ws.kind != TARGET_WAITKIND_IGNORE)
6601 case 'S': /* Old style status, just signal only. */
6605 event->ws.kind = TARGET_WAITKIND_STOPPED;
6606 sig = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
6607 if (GDB_SIGNAL_FIRST <= sig && sig < GDB_SIGNAL_LAST)
6608 event->ws.value.sig = (enum gdb_signal) sig;
6610 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
6613 case 'w': /* Thread exited. */
6618 event->ws.kind = TARGET_WAITKIND_THREAD_EXITED;
6619 p = unpack_varlen_hex (&buf[1], &value);
6620 event->ws.value.integer = value;
6622 error (_("stop reply packet badly formatted: %s"), buf);
6623 event->ptid = read_ptid (++p, NULL);
6626 case 'W': /* Target exited. */
6633 /* GDB used to accept only 2 hex chars here. Stubs should
6634 only send more if they detect GDB supports multi-process
6636 p = unpack_varlen_hex (&buf[1], &value);
6640 /* The remote process exited. */
6641 event->ws.kind = TARGET_WAITKIND_EXITED;
6642 event->ws.value.integer = value;
6646 /* The remote process exited with a signal. */
6647 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
6648 if (GDB_SIGNAL_FIRST <= value && value < GDB_SIGNAL_LAST)
6649 event->ws.value.sig = (enum gdb_signal) value;
6651 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
6654 /* If no process is specified, assume inferior_ptid. */
6655 pid = ptid_get_pid (inferior_ptid);
6664 else if (startswith (p, "process:"))
6668 p += sizeof ("process:") - 1;
6669 unpack_varlen_hex (p, &upid);
6673 error (_("unknown stop reply packet: %s"), buf);
6676 error (_("unknown stop reply packet: %s"), buf);
6677 event->ptid = pid_to_ptid (pid);
6681 event->ws.kind = TARGET_WAITKIND_NO_RESUMED;
6682 event->ptid = minus_one_ptid;
6686 if (target_is_non_stop_p () && ptid_equal (event->ptid, null_ptid))
6687 error (_("No process or thread specified in stop reply: %s"), buf);
6690 /* When the stub wants to tell GDB about a new notification reply, it
6691 sends a notification (%Stop, for example). Those can come it at
6692 any time, hence, we have to make sure that any pending
6693 putpkt/getpkt sequence we're making is finished, before querying
6694 the stub for more events with the corresponding ack command
6695 (vStopped, for example). E.g., if we started a vStopped sequence
6696 immediately upon receiving the notification, something like this
6704 1.6) <-- (registers reply to step #1.3)
6706 Obviously, the reply in step #1.6 would be unexpected to a vStopped
6709 To solve this, whenever we parse a %Stop notification successfully,
6710 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
6711 doing whatever we were doing:
6717 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
6718 2.5) <-- (registers reply to step #2.3)
6720 Eventualy after step #2.5, we return to the event loop, which
6721 notices there's an event on the
6722 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
6723 associated callback --- the function below. At this point, we're
6724 always safe to start a vStopped sequence. :
6727 2.7) <-- T05 thread:2
6733 remote_notif_get_pending_events (struct notif_client *nc)
6735 struct remote_state *rs = get_remote_state ();
6737 if (rs->notif_state->pending_event[nc->id] != NULL)
6740 fprintf_unfiltered (gdb_stdlog,
6741 "notif: process: '%s' ack pending event\n",
6745 nc->ack (nc, rs->buf, rs->notif_state->pending_event[nc->id]);
6746 rs->notif_state->pending_event[nc->id] = NULL;
6750 getpkt (&rs->buf, &rs->buf_size, 0);
6751 if (strcmp (rs->buf, "OK") == 0)
6754 remote_notif_ack (nc, rs->buf);
6760 fprintf_unfiltered (gdb_stdlog,
6761 "notif: process: '%s' no pending reply\n",
6766 /* Called when it is decided that STOP_REPLY holds the info of the
6767 event that is to be returned to the core. This function always
6768 destroys STOP_REPLY. */
6771 process_stop_reply (struct stop_reply *stop_reply,
6772 struct target_waitstatus *status)
6776 *status = stop_reply->ws;
6777 ptid = stop_reply->ptid;
6779 /* If no thread/process was reported by the stub, assume the current
6781 if (ptid_equal (ptid, null_ptid))
6782 ptid = inferior_ptid;
6784 if (status->kind != TARGET_WAITKIND_EXITED
6785 && status->kind != TARGET_WAITKIND_SIGNALLED
6786 && status->kind != TARGET_WAITKIND_NO_RESUMED)
6788 struct private_thread_info *remote_thr;
6790 /* Expedited registers. */
6791 if (stop_reply->regcache)
6793 struct regcache *regcache
6794 = get_thread_arch_regcache (ptid, target_gdbarch ());
6799 VEC_iterate(cached_reg_t, stop_reply->regcache, ix, reg);
6801 regcache_raw_supply (regcache, reg->num, reg->data);
6802 VEC_free (cached_reg_t, stop_reply->regcache);
6805 remote_notice_new_inferior (ptid, 0);
6806 remote_thr = demand_private_info (ptid);
6807 remote_thr->core = stop_reply->core;
6808 remote_thr->stop_reason = stop_reply->stop_reason;
6809 remote_thr->watch_data_address = stop_reply->watch_data_address;
6812 stop_reply_xfree (stop_reply);
6816 /* The non-stop mode version of target_wait. */
6819 remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
6821 struct remote_state *rs = get_remote_state ();
6822 struct stop_reply *stop_reply;
6826 /* If in non-stop mode, get out of getpkt even if a
6827 notification is received. */
6829 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
6830 0 /* forever */, &is_notif);
6833 if (ret != -1 && !is_notif)
6836 case 'E': /* Error of some sort. */
6837 /* We're out of sync with the target now. Did it continue
6838 or not? We can't tell which thread it was in non-stop,
6839 so just ignore this. */
6840 warning (_("Remote failure reply: %s"), rs->buf);
6842 case 'O': /* Console output. */
6843 remote_console_output (rs->buf + 1);
6846 warning (_("Invalid remote reply: %s"), rs->buf);
6850 /* Acknowledge a pending stop reply that may have arrived in the
6852 if (rs->notif_state->pending_event[notif_client_stop.id] != NULL)
6853 remote_notif_get_pending_events (¬if_client_stop);
6855 /* If indeed we noticed a stop reply, we're done. */
6856 stop_reply = queued_stop_reply (ptid);
6857 if (stop_reply != NULL)
6858 return process_stop_reply (stop_reply, status);
6860 /* Still no event. If we're just polling for an event, then
6861 return to the event loop. */
6862 if (options & TARGET_WNOHANG)
6864 status->kind = TARGET_WAITKIND_IGNORE;
6865 return minus_one_ptid;
6868 /* Otherwise do a blocking wait. */
6869 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
6870 1 /* forever */, &is_notif);
6874 /* Wait until the remote machine stops, then return, storing status in
6875 STATUS just as `wait' would. */
6878 remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options)
6880 struct remote_state *rs = get_remote_state ();
6881 ptid_t event_ptid = null_ptid;
6883 struct stop_reply *stop_reply;
6887 status->kind = TARGET_WAITKIND_IGNORE;
6888 status->value.integer = 0;
6890 stop_reply = queued_stop_reply (ptid);
6891 if (stop_reply != NULL)
6892 return process_stop_reply (stop_reply, status);
6894 if (rs->cached_wait_status)
6895 /* Use the cached wait status, but only once. */
6896 rs->cached_wait_status = 0;
6901 int forever = ((options & TARGET_WNOHANG) == 0
6902 && wait_forever_enabled_p);
6904 if (!rs->waiting_for_stop_reply)
6906 status->kind = TARGET_WAITKIND_NO_RESUMED;
6907 return minus_one_ptid;
6910 /* FIXME: cagney/1999-09-27: If we're in async mode we should
6911 _never_ wait for ever -> test on target_is_async_p().
6912 However, before we do that we need to ensure that the caller
6913 knows how to take the target into/out of async mode. */
6914 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
6915 forever, &is_notif);
6917 /* GDB gets a notification. Return to core as this event is
6919 if (ret != -1 && is_notif)
6920 return minus_one_ptid;
6922 if (ret == -1 && (options & TARGET_WNOHANG) != 0)
6923 return minus_one_ptid;
6928 /* Assume that the target has acknowledged Ctrl-C unless we receive
6929 an 'F' or 'O' packet. */
6930 if (buf[0] != 'F' && buf[0] != 'O')
6931 rs->ctrlc_pending_p = 0;
6935 case 'E': /* Error of some sort. */
6936 /* We're out of sync with the target now. Did it continue or
6937 not? Not is more likely, so report a stop. */
6938 rs->waiting_for_stop_reply = 0;
6940 warning (_("Remote failure reply: %s"), buf);
6941 status->kind = TARGET_WAITKIND_STOPPED;
6942 status->value.sig = GDB_SIGNAL_0;
6944 case 'F': /* File-I/O request. */
6945 /* GDB may access the inferior memory while handling the File-I/O
6946 request, but we don't want GDB accessing memory while waiting
6947 for a stop reply. See the comments in putpkt_binary. Set
6948 waiting_for_stop_reply to 0 temporarily. */
6949 rs->waiting_for_stop_reply = 0;
6950 remote_fileio_request (buf, rs->ctrlc_pending_p);
6951 rs->ctrlc_pending_p = 0;
6952 /* GDB handled the File-I/O request, and the target is running
6953 again. Keep waiting for events. */
6954 rs->waiting_for_stop_reply = 1;
6956 case 'N': case 'T': case 'S': case 'X': case 'W':
6958 struct stop_reply *stop_reply;
6960 /* There is a stop reply to handle. */
6961 rs->waiting_for_stop_reply = 0;
6964 = (struct stop_reply *) remote_notif_parse (¬if_client_stop,
6967 event_ptid = process_stop_reply (stop_reply, status);
6970 case 'O': /* Console output. */
6971 remote_console_output (buf + 1);
6974 if (rs->last_sent_signal != GDB_SIGNAL_0)
6976 /* Zero length reply means that we tried 'S' or 'C' and the
6977 remote system doesn't support it. */
6978 target_terminal_ours_for_output ();
6980 ("Can't send signals to this remote system. %s not sent.\n",
6981 gdb_signal_to_name (rs->last_sent_signal));
6982 rs->last_sent_signal = GDB_SIGNAL_0;
6983 target_terminal_inferior ();
6985 strcpy ((char *) buf, rs->last_sent_step ? "s" : "c");
6986 putpkt ((char *) buf);
6989 /* else fallthrough */
6991 warning (_("Invalid remote reply: %s"), buf);
6995 if (status->kind == TARGET_WAITKIND_NO_RESUMED)
6996 return minus_one_ptid;
6997 else if (status->kind == TARGET_WAITKIND_IGNORE)
6999 /* Nothing interesting happened. If we're doing a non-blocking
7000 poll, we're done. Otherwise, go back to waiting. */
7001 if (options & TARGET_WNOHANG)
7002 return minus_one_ptid;
7006 else if (status->kind != TARGET_WAITKIND_EXITED
7007 && status->kind != TARGET_WAITKIND_SIGNALLED)
7009 if (!ptid_equal (event_ptid, null_ptid))
7010 record_currthread (rs, event_ptid);
7012 event_ptid = inferior_ptid;
7015 /* A process exit. Invalidate our notion of current thread. */
7016 record_currthread (rs, minus_one_ptid);
7021 /* Wait until the remote machine stops, then return, storing status in
7022 STATUS just as `wait' would. */
7025 remote_wait (struct target_ops *ops,
7026 ptid_t ptid, struct target_waitstatus *status, int options)
7030 if (target_is_non_stop_p ())
7031 event_ptid = remote_wait_ns (ptid, status, options);
7033 event_ptid = remote_wait_as (ptid, status, options);
7035 if (target_is_async_p ())
7037 /* If there are are events left in the queue tell the event loop
7039 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
7040 mark_async_event_handler (remote_async_inferior_event_token);
7046 /* Fetch a single register using a 'p' packet. */
7049 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
7051 struct remote_state *rs = get_remote_state ();
7053 char regp[MAX_REGISTER_SIZE];
7056 if (packet_support (PACKET_p) == PACKET_DISABLE)
7059 if (reg->pnum == -1)
7064 p += hexnumstr (p, reg->pnum);
7067 getpkt (&rs->buf, &rs->buf_size, 0);
7071 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
7075 case PACKET_UNKNOWN:
7078 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7079 gdbarch_register_name (get_regcache_arch (regcache),
7084 /* If this register is unfetchable, tell the regcache. */
7087 regcache_raw_supply (regcache, reg->regnum, NULL);
7091 /* Otherwise, parse and supply the value. */
7097 error (_("fetch_register_using_p: early buf termination"));
7099 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
7102 regcache_raw_supply (regcache, reg->regnum, regp);
7106 /* Fetch the registers included in the target's 'g' packet. */
7109 send_g_packet (void)
7111 struct remote_state *rs = get_remote_state ();
7114 xsnprintf (rs->buf, get_remote_packet_size (), "g");
7115 remote_send (&rs->buf, &rs->buf_size);
7117 /* We can get out of synch in various cases. If the first character
7118 in the buffer is not a hex character, assume that has happened
7119 and try to fetch another packet to read. */
7120 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
7121 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
7122 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
7123 && rs->buf[0] != 'x') /* New: unavailable register value. */
7126 fprintf_unfiltered (gdb_stdlog,
7127 "Bad register packet; fetching a new packet\n");
7128 getpkt (&rs->buf, &rs->buf_size, 0);
7131 buf_len = strlen (rs->buf);
7133 /* Sanity check the received packet. */
7134 if (buf_len % 2 != 0)
7135 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
7141 process_g_packet (struct regcache *regcache)
7143 struct gdbarch *gdbarch = get_regcache_arch (regcache);
7144 struct remote_state *rs = get_remote_state ();
7145 struct remote_arch_state *rsa = get_remote_arch_state ();
7150 buf_len = strlen (rs->buf);
7152 /* Further sanity checks, with knowledge of the architecture. */
7153 if (buf_len > 2 * rsa->sizeof_g_packet)
7154 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
7156 /* Save the size of the packet sent to us by the target. It is used
7157 as a heuristic when determining the max size of packets that the
7158 target can safely receive. */
7159 if (rsa->actual_register_packet_size == 0)
7160 rsa->actual_register_packet_size = buf_len;
7162 /* If this is smaller than we guessed the 'g' packet would be,
7163 update our records. A 'g' reply that doesn't include a register's
7164 value implies either that the register is not available, or that
7165 the 'p' packet must be used. */
7166 if (buf_len < 2 * rsa->sizeof_g_packet)
7168 rsa->sizeof_g_packet = buf_len / 2;
7170 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
7172 if (rsa->regs[i].pnum == -1)
7175 if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
7176 rsa->regs[i].in_g_packet = 0;
7178 rsa->regs[i].in_g_packet = 1;
7182 regs = (char *) alloca (rsa->sizeof_g_packet);
7184 /* Unimplemented registers read as all bits zero. */
7185 memset (regs, 0, rsa->sizeof_g_packet);
7187 /* Reply describes registers byte by byte, each byte encoded as two
7188 hex characters. Suck them all up, then supply them to the
7189 register cacheing/storage mechanism. */
7192 for (i = 0; i < rsa->sizeof_g_packet; i++)
7194 if (p[0] == 0 || p[1] == 0)
7195 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7196 internal_error (__FILE__, __LINE__,
7197 _("unexpected end of 'g' packet reply"));
7199 if (p[0] == 'x' && p[1] == 'x')
7200 regs[i] = 0; /* 'x' */
7202 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
7206 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
7208 struct packet_reg *r = &rsa->regs[i];
7212 if (r->offset * 2 >= strlen (rs->buf))
7213 /* This shouldn't happen - we adjusted in_g_packet above. */
7214 internal_error (__FILE__, __LINE__,
7215 _("unexpected end of 'g' packet reply"));
7216 else if (rs->buf[r->offset * 2] == 'x')
7218 gdb_assert (r->offset * 2 < strlen (rs->buf));
7219 /* The register isn't available, mark it as such (at
7220 the same time setting the value to zero). */
7221 regcache_raw_supply (regcache, r->regnum, NULL);
7224 regcache_raw_supply (regcache, r->regnum,
7231 fetch_registers_using_g (struct regcache *regcache)
7234 process_g_packet (regcache);
7237 /* Make the remote selected traceframe match GDB's selected
7241 set_remote_traceframe (void)
7244 struct remote_state *rs = get_remote_state ();
7246 if (rs->remote_traceframe_number == get_traceframe_number ())
7249 /* Avoid recursion, remote_trace_find calls us again. */
7250 rs->remote_traceframe_number = get_traceframe_number ();
7252 newnum = target_trace_find (tfind_number,
7253 get_traceframe_number (), 0, 0, NULL);
7255 /* Should not happen. If it does, all bets are off. */
7256 if (newnum != get_traceframe_number ())
7257 warning (_("could not set remote traceframe"));
7261 remote_fetch_registers (struct target_ops *ops,
7262 struct regcache *regcache, int regnum)
7264 struct remote_arch_state *rsa = get_remote_arch_state ();
7267 set_remote_traceframe ();
7268 set_general_thread (inferior_ptid);
7272 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
7274 gdb_assert (reg != NULL);
7276 /* If this register might be in the 'g' packet, try that first -
7277 we are likely to read more than one register. If this is the
7278 first 'g' packet, we might be overly optimistic about its
7279 contents, so fall back to 'p'. */
7280 if (reg->in_g_packet)
7282 fetch_registers_using_g (regcache);
7283 if (reg->in_g_packet)
7287 if (fetch_register_using_p (regcache, reg))
7290 /* This register is not available. */
7291 regcache_raw_supply (regcache, reg->regnum, NULL);
7296 fetch_registers_using_g (regcache);
7298 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7299 if (!rsa->regs[i].in_g_packet)
7300 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
7302 /* This register is not available. */
7303 regcache_raw_supply (regcache, i, NULL);
7307 /* Prepare to store registers. Since we may send them all (using a
7308 'G' request), we have to read out the ones we don't want to change
7312 remote_prepare_to_store (struct target_ops *self, struct regcache *regcache)
7314 struct remote_arch_state *rsa = get_remote_arch_state ();
7316 gdb_byte buf[MAX_REGISTER_SIZE];
7318 /* Make sure the entire registers array is valid. */
7319 switch (packet_support (PACKET_P))
7321 case PACKET_DISABLE:
7322 case PACKET_SUPPORT_UNKNOWN:
7323 /* Make sure all the necessary registers are cached. */
7324 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7325 if (rsa->regs[i].in_g_packet)
7326 regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
7333 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7334 packet was not recognized. */
7337 store_register_using_P (const struct regcache *regcache,
7338 struct packet_reg *reg)
7340 struct gdbarch *gdbarch = get_regcache_arch (regcache);
7341 struct remote_state *rs = get_remote_state ();
7342 /* Try storing a single register. */
7343 char *buf = rs->buf;
7344 gdb_byte regp[MAX_REGISTER_SIZE];
7347 if (packet_support (PACKET_P) == PACKET_DISABLE)
7350 if (reg->pnum == -1)
7353 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
7354 p = buf + strlen (buf);
7355 regcache_raw_collect (regcache, reg->regnum, regp);
7356 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
7358 getpkt (&rs->buf, &rs->buf_size, 0);
7360 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
7365 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7366 gdbarch_register_name (gdbarch, reg->regnum), rs->buf);
7367 case PACKET_UNKNOWN:
7370 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
7374 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7375 contents of the register cache buffer. FIXME: ignores errors. */
7378 store_registers_using_G (const struct regcache *regcache)
7380 struct remote_state *rs = get_remote_state ();
7381 struct remote_arch_state *rsa = get_remote_arch_state ();
7385 /* Extract all the registers in the regcache copying them into a
7390 regs = (gdb_byte *) alloca (rsa->sizeof_g_packet);
7391 memset (regs, 0, rsa->sizeof_g_packet);
7392 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7394 struct packet_reg *r = &rsa->regs[i];
7397 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
7401 /* Command describes registers byte by byte,
7402 each byte encoded as two hex characters. */
7405 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
7407 bin2hex (regs, p, rsa->sizeof_g_packet);
7409 getpkt (&rs->buf, &rs->buf_size, 0);
7410 if (packet_check_result (rs->buf) == PACKET_ERROR)
7411 error (_("Could not write registers; remote failure reply '%s'"),
7415 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7416 of the register cache buffer. FIXME: ignores errors. */
7419 remote_store_registers (struct target_ops *ops,
7420 struct regcache *regcache, int regnum)
7422 struct remote_arch_state *rsa = get_remote_arch_state ();
7425 set_remote_traceframe ();
7426 set_general_thread (inferior_ptid);
7430 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
7432 gdb_assert (reg != NULL);
7434 /* Always prefer to store registers using the 'P' packet if
7435 possible; we often change only a small number of registers.
7436 Sometimes we change a larger number; we'd need help from a
7437 higher layer to know to use 'G'. */
7438 if (store_register_using_P (regcache, reg))
7441 /* For now, don't complain if we have no way to write the
7442 register. GDB loses track of unavailable registers too
7443 easily. Some day, this may be an error. We don't have
7444 any way to read the register, either... */
7445 if (!reg->in_g_packet)
7448 store_registers_using_G (regcache);
7452 store_registers_using_G (regcache);
7454 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
7455 if (!rsa->regs[i].in_g_packet)
7456 if (!store_register_using_P (regcache, &rsa->regs[i]))
7457 /* See above for why we do not issue an error here. */
7462 /* Return the number of hex digits in num. */
7465 hexnumlen (ULONGEST num)
7469 for (i = 0; num != 0; i++)
7475 /* Set BUF to the minimum number of hex digits representing NUM. */
7478 hexnumstr (char *buf, ULONGEST num)
7480 int len = hexnumlen (num);
7482 return hexnumnstr (buf, num, len);
7486 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7489 hexnumnstr (char *buf, ULONGEST num, int width)
7495 for (i = width - 1; i >= 0; i--)
7497 buf[i] = "0123456789abcdef"[(num & 0xf)];
7504 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7507 remote_address_masked (CORE_ADDR addr)
7509 unsigned int address_size = remote_address_size;
7511 /* If "remoteaddresssize" was not set, default to target address size. */
7513 address_size = gdbarch_addr_bit (target_gdbarch ());
7515 if (address_size > 0
7516 && address_size < (sizeof (ULONGEST) * 8))
7518 /* Only create a mask when that mask can safely be constructed
7519 in a ULONGEST variable. */
7522 mask = (mask << address_size) - 1;
7528 /* Determine whether the remote target supports binary downloading.
7529 This is accomplished by sending a no-op memory write of zero length
7530 to the target at the specified address. It does not suffice to send
7531 the whole packet, since many stubs strip the eighth bit and
7532 subsequently compute a wrong checksum, which causes real havoc with
7535 NOTE: This can still lose if the serial line is not eight-bit
7536 clean. In cases like this, the user should clear "remote
7540 check_binary_download (CORE_ADDR addr)
7542 struct remote_state *rs = get_remote_state ();
7544 switch (packet_support (PACKET_X))
7546 case PACKET_DISABLE:
7550 case PACKET_SUPPORT_UNKNOWN:
7556 p += hexnumstr (p, (ULONGEST) addr);
7558 p += hexnumstr (p, (ULONGEST) 0);
7562 putpkt_binary (rs->buf, (int) (p - rs->buf));
7563 getpkt (&rs->buf, &rs->buf_size, 0);
7565 if (rs->buf[0] == '\0')
7568 fprintf_unfiltered (gdb_stdlog,
7569 "binary downloading NOT "
7570 "supported by target\n");
7571 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
7576 fprintf_unfiltered (gdb_stdlog,
7577 "binary downloading supported by target\n");
7578 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
7585 /* Helper function to resize the payload in order to try to get a good
7586 alignment. We try to write an amount of data such that the next write will
7587 start on an address aligned on REMOTE_ALIGN_WRITES. */
7590 align_for_efficient_write (int todo, CORE_ADDR memaddr)
7592 return ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
7595 /* Write memory data directly to the remote machine.
7596 This does not inform the data cache; the data cache uses this.
7597 HEADER is the starting part of the packet.
7598 MEMADDR is the address in the remote memory space.
7599 MYADDR is the address of the buffer in our space.
7600 LEN_UNITS is the number of addressable units to write.
7601 UNIT_SIZE is the length in bytes of an addressable unit.
7602 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
7603 should send data as binary ('X'), or hex-encoded ('M').
7605 The function creates packet of the form
7606 <HEADER><ADDRESS>,<LENGTH>:<DATA>
7608 where encoding of <DATA> is terminated by PACKET_FORMAT.
7610 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
7613 Return the transferred status, error or OK (an
7614 'enum target_xfer_status' value). Save the number of addressable units
7615 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
7617 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
7618 exchange between gdb and the stub could look like (?? in place of the
7624 -> $M1000,3:eeeeffffeeee#??
7628 <- eeeeffffeeeedddd */
7630 static enum target_xfer_status
7631 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
7632 const gdb_byte *myaddr, ULONGEST len_units,
7633 int unit_size, ULONGEST *xfered_len_units,
7634 char packet_format, int use_length)
7636 struct remote_state *rs = get_remote_state ();
7642 int payload_capacity_bytes;
7643 int payload_length_bytes;
7645 if (packet_format != 'X' && packet_format != 'M')
7646 internal_error (__FILE__, __LINE__,
7647 _("remote_write_bytes_aux: bad packet format"));
7650 return TARGET_XFER_EOF;
7652 payload_capacity_bytes = get_memory_write_packet_size ();
7654 /* The packet buffer will be large enough for the payload;
7655 get_memory_packet_size ensures this. */
7658 /* Compute the size of the actual payload by subtracting out the
7659 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
7661 payload_capacity_bytes -= strlen ("$,:#NN");
7663 /* The comma won't be used. */
7664 payload_capacity_bytes += 1;
7665 payload_capacity_bytes -= strlen (header);
7666 payload_capacity_bytes -= hexnumlen (memaddr);
7668 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
7670 strcat (rs->buf, header);
7671 p = rs->buf + strlen (header);
7673 /* Compute a best guess of the number of bytes actually transfered. */
7674 if (packet_format == 'X')
7676 /* Best guess at number of bytes that will fit. */
7677 todo_units = min (len_units, payload_capacity_bytes / unit_size);
7679 payload_capacity_bytes -= hexnumlen (todo_units);
7680 todo_units = min (todo_units, payload_capacity_bytes / unit_size);
7684 /* Number of bytes that will fit. */
7685 todo_units = min (len_units, (payload_capacity_bytes / unit_size) / 2);
7687 payload_capacity_bytes -= hexnumlen (todo_units);
7688 todo_units = min (todo_units, (payload_capacity_bytes / unit_size) / 2);
7691 if (todo_units <= 0)
7692 internal_error (__FILE__, __LINE__,
7693 _("minimum packet size too small to write data"));
7695 /* If we already need another packet, then try to align the end
7696 of this packet to a useful boundary. */
7697 if (todo_units > 2 * REMOTE_ALIGN_WRITES && todo_units < len_units)
7698 todo_units = align_for_efficient_write (todo_units, memaddr);
7700 /* Append "<memaddr>". */
7701 memaddr = remote_address_masked (memaddr);
7702 p += hexnumstr (p, (ULONGEST) memaddr);
7709 /* Append the length and retain its location and size. It may need to be
7710 adjusted once the packet body has been created. */
7712 plenlen = hexnumstr (p, (ULONGEST) todo_units);
7720 /* Append the packet body. */
7721 if (packet_format == 'X')
7723 /* Binary mode. Send target system values byte by byte, in
7724 increasing byte addresses. Only escape certain critical
7726 payload_length_bytes =
7727 remote_escape_output (myaddr, todo_units, unit_size, (gdb_byte *) p,
7728 &units_written, payload_capacity_bytes);
7730 /* If not all TODO units fit, then we'll need another packet. Make
7731 a second try to keep the end of the packet aligned. Don't do
7732 this if the packet is tiny. */
7733 if (units_written < todo_units && units_written > 2 * REMOTE_ALIGN_WRITES)
7737 new_todo_units = align_for_efficient_write (units_written, memaddr);
7739 if (new_todo_units != units_written)
7740 payload_length_bytes =
7741 remote_escape_output (myaddr, new_todo_units, unit_size,
7742 (gdb_byte *) p, &units_written,
7743 payload_capacity_bytes);
7746 p += payload_length_bytes;
7747 if (use_length && units_written < todo_units)
7749 /* Escape chars have filled up the buffer prematurely,
7750 and we have actually sent fewer units than planned.
7751 Fix-up the length field of the packet. Use the same
7752 number of characters as before. */
7753 plen += hexnumnstr (plen, (ULONGEST) units_written,
7755 *plen = ':'; /* overwrite \0 from hexnumnstr() */
7760 /* Normal mode: Send target system values byte by byte, in
7761 increasing byte addresses. Each byte is encoded as a two hex
7763 p += 2 * bin2hex (myaddr, p, todo_units * unit_size);
7764 units_written = todo_units;
7767 putpkt_binary (rs->buf, (int) (p - rs->buf));
7768 getpkt (&rs->buf, &rs->buf_size, 0);
7770 if (rs->buf[0] == 'E')
7771 return TARGET_XFER_E_IO;
7773 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
7774 send fewer units than we'd planned. */
7775 *xfered_len_units = (ULONGEST) units_written;
7776 return TARGET_XFER_OK;
7779 /* Write memory data directly to the remote machine.
7780 This does not inform the data cache; the data cache uses this.
7781 MEMADDR is the address in the remote memory space.
7782 MYADDR is the address of the buffer in our space.
7783 LEN is the number of bytes.
7785 Return the transferred status, error or OK (an
7786 'enum target_xfer_status' value). Save the number of bytes
7787 transferred in *XFERED_LEN. Only transfer a single packet. */
7789 static enum target_xfer_status
7790 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, ULONGEST len,
7791 int unit_size, ULONGEST *xfered_len)
7793 char *packet_format = 0;
7795 /* Check whether the target supports binary download. */
7796 check_binary_download (memaddr);
7798 switch (packet_support (PACKET_X))
7801 packet_format = "X";
7803 case PACKET_DISABLE:
7804 packet_format = "M";
7806 case PACKET_SUPPORT_UNKNOWN:
7807 internal_error (__FILE__, __LINE__,
7808 _("remote_write_bytes: bad internal state"));
7810 internal_error (__FILE__, __LINE__, _("bad switch"));
7813 return remote_write_bytes_aux (packet_format,
7814 memaddr, myaddr, len, unit_size, xfered_len,
7815 packet_format[0], 1);
7818 /* Read memory data directly from the remote machine.
7819 This does not use the data cache; the data cache uses this.
7820 MEMADDR is the address in the remote memory space.
7821 MYADDR is the address of the buffer in our space.
7822 LEN_UNITS is the number of addressable memory units to read..
7823 UNIT_SIZE is the length in bytes of an addressable unit.
7825 Return the transferred status, error or OK (an
7826 'enum target_xfer_status' value). Save the number of bytes
7827 transferred in *XFERED_LEN_UNITS.
7829 See the comment of remote_write_bytes_aux for an example of
7830 memory read/write exchange between gdb and the stub. */
7832 static enum target_xfer_status
7833 remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr, ULONGEST len_units,
7834 int unit_size, ULONGEST *xfered_len_units)
7836 struct remote_state *rs = get_remote_state ();
7837 int buf_size_bytes; /* Max size of packet output buffer. */
7842 buf_size_bytes = get_memory_read_packet_size ();
7843 /* The packet buffer will be large enough for the payload;
7844 get_memory_packet_size ensures this. */
7846 /* Number of units that will fit. */
7847 todo_units = min (len_units, (buf_size_bytes / unit_size) / 2);
7849 /* Construct "m"<memaddr>","<len>". */
7850 memaddr = remote_address_masked (memaddr);
7853 p += hexnumstr (p, (ULONGEST) memaddr);
7855 p += hexnumstr (p, (ULONGEST) todo_units);
7858 getpkt (&rs->buf, &rs->buf_size, 0);
7859 if (rs->buf[0] == 'E'
7860 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
7861 && rs->buf[3] == '\0')
7862 return TARGET_XFER_E_IO;
7863 /* Reply describes memory byte by byte, each byte encoded as two hex
7866 decoded_bytes = hex2bin (p, myaddr, todo_units * unit_size);
7867 /* Return what we have. Let higher layers handle partial reads. */
7868 *xfered_len_units = (ULONGEST) (decoded_bytes / unit_size);
7869 return TARGET_XFER_OK;
7872 /* Using the set of read-only target sections of remote, read live
7875 For interface/parameters/return description see target.h,
7878 static enum target_xfer_status
7879 remote_xfer_live_readonly_partial (struct target_ops *ops, gdb_byte *readbuf,
7880 ULONGEST memaddr, ULONGEST len,
7881 int unit_size, ULONGEST *xfered_len)
7883 struct target_section *secp;
7884 struct target_section_table *table;
7886 secp = target_section_by_addr (ops, memaddr);
7888 && (bfd_get_section_flags (secp->the_bfd_section->owner,
7889 secp->the_bfd_section)
7892 struct target_section *p;
7893 ULONGEST memend = memaddr + len;
7895 table = target_get_section_table (ops);
7897 for (p = table->sections; p < table->sections_end; p++)
7899 if (memaddr >= p->addr)
7901 if (memend <= p->endaddr)
7903 /* Entire transfer is within this section. */
7904 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
7907 else if (memaddr >= p->endaddr)
7909 /* This section ends before the transfer starts. */
7914 /* This section overlaps the transfer. Just do half. */
7915 len = p->endaddr - memaddr;
7916 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
7923 return TARGET_XFER_EOF;
7926 /* Similar to remote_read_bytes_1, but it reads from the remote stub
7927 first if the requested memory is unavailable in traceframe.
7928 Otherwise, fall back to remote_read_bytes_1. */
7930 static enum target_xfer_status
7931 remote_read_bytes (struct target_ops *ops, CORE_ADDR memaddr,
7932 gdb_byte *myaddr, ULONGEST len, int unit_size,
7933 ULONGEST *xfered_len)
7936 return TARGET_XFER_EOF;
7938 if (get_traceframe_number () != -1)
7940 VEC(mem_range_s) *available;
7942 /* If we fail to get the set of available memory, then the
7943 target does not support querying traceframe info, and so we
7944 attempt reading from the traceframe anyway (assuming the
7945 target implements the old QTro packet then). */
7946 if (traceframe_available_memory (&available, memaddr, len))
7948 struct cleanup *old_chain;
7950 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
7952 if (VEC_empty (mem_range_s, available)
7953 || VEC_index (mem_range_s, available, 0)->start != memaddr)
7955 enum target_xfer_status res;
7957 /* Don't read into the traceframe's available
7959 if (!VEC_empty (mem_range_s, available))
7961 LONGEST oldlen = len;
7963 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
7964 gdb_assert (len <= oldlen);
7967 do_cleanups (old_chain);
7969 /* This goes through the topmost target again. */
7970 res = remote_xfer_live_readonly_partial (ops, myaddr, memaddr,
7971 len, unit_size, xfered_len);
7972 if (res == TARGET_XFER_OK)
7973 return TARGET_XFER_OK;
7976 /* No use trying further, we know some memory starting
7977 at MEMADDR isn't available. */
7979 return TARGET_XFER_UNAVAILABLE;
7983 /* Don't try to read more than how much is available, in
7984 case the target implements the deprecated QTro packet to
7985 cater for older GDBs (the target's knowledge of read-only
7986 sections may be outdated by now). */
7987 len = VEC_index (mem_range_s, available, 0)->length;
7989 do_cleanups (old_chain);
7993 return remote_read_bytes_1 (memaddr, myaddr, len, unit_size, xfered_len);
7998 /* Sends a packet with content determined by the printf format string
7999 FORMAT and the remaining arguments, then gets the reply. Returns
8000 whether the packet was a success, a failure, or unknown. */
8002 static enum packet_result remote_send_printf (const char *format, ...)
8003 ATTRIBUTE_PRINTF (1, 2);
8005 static enum packet_result
8006 remote_send_printf (const char *format, ...)
8008 struct remote_state *rs = get_remote_state ();
8009 int max_size = get_remote_packet_size ();
8012 va_start (ap, format);
8015 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
8016 internal_error (__FILE__, __LINE__, _("Too long remote packet."));
8018 if (putpkt (rs->buf) < 0)
8019 error (_("Communication problem with target."));
8022 getpkt (&rs->buf, &rs->buf_size, 0);
8024 return packet_check_result (rs->buf);
8028 restore_remote_timeout (void *p)
8030 int value = *(int *)p;
8032 remote_timeout = value;
8035 /* Flash writing can take quite some time. We'll set
8036 effectively infinite timeout for flash operations.
8037 In future, we'll need to decide on a better approach. */
8038 static const int remote_flash_timeout = 1000;
8041 remote_flash_erase (struct target_ops *ops,
8042 ULONGEST address, LONGEST length)
8044 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
8045 int saved_remote_timeout = remote_timeout;
8046 enum packet_result ret;
8047 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
8048 &saved_remote_timeout);
8050 remote_timeout = remote_flash_timeout;
8052 ret = remote_send_printf ("vFlashErase:%s,%s",
8053 phex (address, addr_size),
8057 case PACKET_UNKNOWN:
8058 error (_("Remote target does not support flash erase"));
8060 error (_("Error erasing flash with vFlashErase packet"));
8065 do_cleanups (back_to);
8068 static enum target_xfer_status
8069 remote_flash_write (struct target_ops *ops, ULONGEST address,
8070 ULONGEST length, ULONGEST *xfered_len,
8071 const gdb_byte *data)
8073 int saved_remote_timeout = remote_timeout;
8074 enum target_xfer_status ret;
8075 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
8076 &saved_remote_timeout);
8078 remote_timeout = remote_flash_timeout;
8079 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 1,
8081 do_cleanups (back_to);
8087 remote_flash_done (struct target_ops *ops)
8089 int saved_remote_timeout = remote_timeout;
8091 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
8092 &saved_remote_timeout);
8094 remote_timeout = remote_flash_timeout;
8095 ret = remote_send_printf ("vFlashDone");
8096 do_cleanups (back_to);
8100 case PACKET_UNKNOWN:
8101 error (_("Remote target does not support vFlashDone"));
8103 error (_("Error finishing flash operation"));
8110 remote_files_info (struct target_ops *ignore)
8112 puts_filtered ("Debugging a target over a serial line.\n");
8115 /* Stuff for dealing with the packets which are part of this protocol.
8116 See comment at top of file for details. */
8118 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8119 error to higher layers. Called when a serial error is detected.
8120 The exception message is STRING, followed by a colon and a blank,
8121 the system error message for errno at function entry and final dot
8122 for output compatibility with throw_perror_with_name. */
8125 unpush_and_perror (const char *string)
8127 int saved_errno = errno;
8129 remote_unpush_target ();
8130 throw_error (TARGET_CLOSE_ERROR, "%s: %s.", string,
8131 safe_strerror (saved_errno));
8134 /* Read a single character from the remote end. The current quit
8135 handler is overridden to avoid quitting in the middle of packet
8136 sequence, as that would break communication with the remote server.
8137 See remote_serial_quit_handler for more detail. */
8140 readchar (int timeout)
8143 struct remote_state *rs = get_remote_state ();
8144 struct cleanup *old_chain;
8146 old_chain = make_cleanup_override_quit_handler (remote_serial_quit_handler);
8148 rs->got_ctrlc_during_io = 0;
8150 ch = serial_readchar (rs->remote_desc, timeout);
8152 if (rs->got_ctrlc_during_io)
8155 do_cleanups (old_chain);
8160 switch ((enum serial_rc) ch)
8163 remote_unpush_target ();
8164 throw_error (TARGET_CLOSE_ERROR, _("Remote connection closed"));
8167 unpush_and_perror (_("Remote communication error. "
8168 "Target disconnected."));
8170 case SERIAL_TIMEOUT:
8176 /* Wrapper for serial_write that closes the target and throws if
8177 writing fails. The current quit handler is overridden to avoid
8178 quitting in the middle of packet sequence, as that would break
8179 communication with the remote server. See
8180 remote_serial_quit_handler for more detail. */
8183 remote_serial_write (const char *str, int len)
8185 struct remote_state *rs = get_remote_state ();
8186 struct cleanup *old_chain;
8188 old_chain = make_cleanup_override_quit_handler (remote_serial_quit_handler);
8190 rs->got_ctrlc_during_io = 0;
8192 if (serial_write (rs->remote_desc, str, len))
8194 unpush_and_perror (_("Remote communication error. "
8195 "Target disconnected."));
8198 if (rs->got_ctrlc_during_io)
8201 do_cleanups (old_chain);
8204 /* Send the command in *BUF to the remote machine, and read the reply
8205 into *BUF. Report an error if we get an error reply. Resize
8206 *BUF using xrealloc if necessary to hold the result, and update
8210 remote_send (char **buf,
8214 getpkt (buf, sizeof_buf, 0);
8216 if ((*buf)[0] == 'E')
8217 error (_("Remote failure reply: %s"), *buf);
8220 /* Return a pointer to an xmalloc'ed string representing an escaped
8221 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
8222 etc. The caller is responsible for releasing the returned
8226 escape_buffer (const char *buf, int n)
8228 struct cleanup *old_chain;
8229 struct ui_file *stb;
8232 stb = mem_fileopen ();
8233 old_chain = make_cleanup_ui_file_delete (stb);
8235 fputstrn_unfiltered (buf, n, '\\', stb);
8236 str = ui_file_xstrdup (stb, NULL);
8237 do_cleanups (old_chain);
8241 /* Display a null-terminated packet on stdout, for debugging, using C
8245 print_packet (const char *buf)
8247 puts_filtered ("\"");
8248 fputstr_filtered (buf, '"', gdb_stdout);
8249 puts_filtered ("\"");
8253 putpkt (const char *buf)
8255 return putpkt_binary (buf, strlen (buf));
8258 /* Send a packet to the remote machine, with error checking. The data
8259 of the packet is in BUF. The string in BUF can be at most
8260 get_remote_packet_size () - 5 to account for the $, # and checksum,
8261 and for a possible /0 if we are debugging (remote_debug) and want
8262 to print the sent packet as a string. */
8265 putpkt_binary (const char *buf, int cnt)
8267 struct remote_state *rs = get_remote_state ();
8269 unsigned char csum = 0;
8270 char *buf2 = (char *) xmalloc (cnt + 6);
8271 struct cleanup *old_chain = make_cleanup (xfree, buf2);
8277 /* Catch cases like trying to read memory or listing threads while
8278 we're waiting for a stop reply. The remote server wouldn't be
8279 ready to handle this request, so we'd hang and timeout. We don't
8280 have to worry about this in synchronous mode, because in that
8281 case it's not possible to issue a command while the target is
8282 running. This is not a problem in non-stop mode, because in that
8283 case, the stub is always ready to process serial input. */
8284 if (!target_is_non_stop_p ()
8285 && target_is_async_p ()
8286 && rs->waiting_for_stop_reply)
8288 error (_("Cannot execute this command while the target is running.\n"
8289 "Use the \"interrupt\" command to stop the target\n"
8290 "and then try again."));
8293 /* We're sending out a new packet. Make sure we don't look at a
8294 stale cached response. */
8295 rs->cached_wait_status = 0;
8297 /* Copy the packet into buffer BUF2, encapsulating it
8298 and giving it a checksum. */
8303 for (i = 0; i < cnt; i++)
8309 *p++ = tohex ((csum >> 4) & 0xf);
8310 *p++ = tohex (csum & 0xf);
8312 /* Send it over and over until we get a positive ack. */
8316 int started_error_output = 0;
8320 struct cleanup *old_chain;
8324 str = escape_buffer (buf2, p - buf2);
8325 old_chain = make_cleanup (xfree, str);
8326 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str);
8327 gdb_flush (gdb_stdlog);
8328 do_cleanups (old_chain);
8330 remote_serial_write (buf2, p - buf2);
8332 /* If this is a no acks version of the remote protocol, send the
8333 packet and move on. */
8337 /* Read until either a timeout occurs (-2) or '+' is read.
8338 Handle any notification that arrives in the mean time. */
8341 ch = readchar (remote_timeout);
8349 case SERIAL_TIMEOUT:
8352 if (started_error_output)
8354 putchar_unfiltered ('\n');
8355 started_error_output = 0;
8364 fprintf_unfiltered (gdb_stdlog, "Ack\n");
8365 do_cleanups (old_chain);
8369 fprintf_unfiltered (gdb_stdlog, "Nak\n");
8371 case SERIAL_TIMEOUT:
8375 do_cleanups (old_chain);
8378 break; /* Retransmit buffer. */
8382 fprintf_unfiltered (gdb_stdlog,
8383 "Packet instead of Ack, ignoring it\n");
8384 /* It's probably an old response sent because an ACK
8385 was lost. Gobble up the packet and ack it so it
8386 doesn't get retransmitted when we resend this
8389 remote_serial_write ("+", 1);
8390 continue; /* Now, go look for +. */
8397 /* If we got a notification, handle it, and go back to looking
8399 /* We've found the start of a notification. Now
8400 collect the data. */
8401 val = read_frame (&rs->buf, &rs->buf_size);
8406 struct cleanup *old_chain;
8409 str = escape_buffer (rs->buf, val);
8410 old_chain = make_cleanup (xfree, str);
8411 fprintf_unfiltered (gdb_stdlog,
8412 " Notification received: %s\n",
8414 do_cleanups (old_chain);
8416 handle_notification (rs->notif_state, rs->buf);
8417 /* We're in sync now, rewait for the ack. */
8424 if (!started_error_output)
8426 started_error_output = 1;
8427 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
8429 fputc_unfiltered (ch & 0177, gdb_stdlog);
8430 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
8439 if (!started_error_output)
8441 started_error_output = 1;
8442 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
8444 fputc_unfiltered (ch & 0177, gdb_stdlog);
8448 break; /* Here to retransmit. */
8452 /* This is wrong. If doing a long backtrace, the user should be
8453 able to get out next time we call QUIT, without anything as
8454 violent as interrupt_query. If we want to provide a way out of
8455 here without getting to the next QUIT, it should be based on
8456 hitting ^C twice as in remote_wait. */
8465 do_cleanups (old_chain);
8469 /* Come here after finding the start of a frame when we expected an
8470 ack. Do our best to discard the rest of this packet. */
8479 c = readchar (remote_timeout);
8482 case SERIAL_TIMEOUT:
8483 /* Nothing we can do. */
8486 /* Discard the two bytes of checksum and stop. */
8487 c = readchar (remote_timeout);
8489 c = readchar (remote_timeout);
8492 case '*': /* Run length encoding. */
8493 /* Discard the repeat count. */
8494 c = readchar (remote_timeout);
8499 /* A regular character. */
8505 /* Come here after finding the start of the frame. Collect the rest
8506 into *BUF, verifying the checksum, length, and handling run-length
8507 compression. NUL terminate the buffer. If there is not enough room,
8508 expand *BUF using xrealloc.
8510 Returns -1 on error, number of characters in buffer (ignoring the
8511 trailing NULL) on success. (could be extended to return one of the
8512 SERIAL status indications). */
8515 read_frame (char **buf_p,
8522 struct remote_state *rs = get_remote_state ();
8529 c = readchar (remote_timeout);
8532 case SERIAL_TIMEOUT:
8534 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
8538 fputs_filtered ("Saw new packet start in middle of old one\n",
8540 return -1; /* Start a new packet, count retries. */
8543 unsigned char pktcsum;
8549 check_0 = readchar (remote_timeout);
8551 check_1 = readchar (remote_timeout);
8553 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
8556 fputs_filtered ("Timeout in checksum, retrying\n",
8560 else if (check_0 < 0 || check_1 < 0)
8563 fputs_filtered ("Communication error in checksum\n",
8568 /* Don't recompute the checksum; with no ack packets we
8569 don't have any way to indicate a packet retransmission
8574 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
8575 if (csum == pktcsum)
8580 struct cleanup *old_chain;
8583 str = escape_buffer (buf, bc);
8584 old_chain = make_cleanup (xfree, str);
8585 fprintf_unfiltered (gdb_stdlog,
8586 "Bad checksum, sentsum=0x%x, "
8587 "csum=0x%x, buf=%s\n",
8588 pktcsum, csum, str);
8589 do_cleanups (old_chain);
8591 /* Number of characters in buffer ignoring trailing
8595 case '*': /* Run length encoding. */
8600 c = readchar (remote_timeout);
8602 repeat = c - ' ' + 3; /* Compute repeat count. */
8604 /* The character before ``*'' is repeated. */
8606 if (repeat > 0 && repeat <= 255 && bc > 0)
8608 if (bc + repeat - 1 >= *sizeof_buf - 1)
8610 /* Make some more room in the buffer. */
8611 *sizeof_buf += repeat;
8612 *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf);
8616 memset (&buf[bc], buf[bc - 1], repeat);
8622 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
8626 if (bc >= *sizeof_buf - 1)
8628 /* Make some more room in the buffer. */
8630 *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf);
8641 /* Read a packet from the remote machine, with error checking, and
8642 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
8643 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
8644 rather than timing out; this is used (in synchronous mode) to wait
8645 for a target that is is executing user code to stop. */
8646 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
8647 don't have to change all the calls to getpkt to deal with the
8648 return value, because at the moment I don't know what the right
8649 thing to do it for those. */
8655 getpkt_sane (buf, sizeof_buf, forever);
8659 /* Read a packet from the remote machine, with error checking, and
8660 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
8661 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
8662 rather than timing out; this is used (in synchronous mode) to wait
8663 for a target that is is executing user code to stop. If FOREVER ==
8664 0, this function is allowed to time out gracefully and return an
8665 indication of this to the caller. Otherwise return the number of
8666 bytes read. If EXPECTING_NOTIF, consider receiving a notification
8667 enough reason to return to the caller. *IS_NOTIF is an output
8668 boolean that indicates whether *BUF holds a notification or not
8669 (a regular packet). */
8672 getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
8673 int expecting_notif, int *is_notif)
8675 struct remote_state *rs = get_remote_state ();
8681 /* We're reading a new response. Make sure we don't look at a
8682 previously cached response. */
8683 rs->cached_wait_status = 0;
8685 strcpy (*buf, "timeout");
8688 timeout = watchdog > 0 ? watchdog : -1;
8689 else if (expecting_notif)
8690 timeout = 0; /* There should already be a char in the buffer. If
8693 timeout = remote_timeout;
8697 /* Process any number of notifications, and then return when
8701 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
8703 for (tries = 1; tries <= MAX_TRIES; tries++)
8705 /* This can loop forever if the remote side sends us
8706 characters continuously, but if it pauses, we'll get
8707 SERIAL_TIMEOUT from readchar because of timeout. Then
8708 we'll count that as a retry.
8710 Note that even when forever is set, we will only wait
8711 forever prior to the start of a packet. After that, we
8712 expect characters to arrive at a brisk pace. They should
8713 show up within remote_timeout intervals. */
8715 c = readchar (timeout);
8716 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
8718 if (c == SERIAL_TIMEOUT)
8720 if (expecting_notif)
8721 return -1; /* Don't complain, it's normal to not get
8722 anything in this case. */
8724 if (forever) /* Watchdog went off? Kill the target. */
8726 remote_unpush_target ();
8727 throw_error (TARGET_CLOSE_ERROR,
8728 _("Watchdog timeout has expired. "
8729 "Target detached."));
8732 fputs_filtered ("Timed out.\n", gdb_stdlog);
8736 /* We've found the start of a packet or notification.
8737 Now collect the data. */
8738 val = read_frame (buf, sizeof_buf);
8743 remote_serial_write ("-", 1);
8746 if (tries > MAX_TRIES)
8748 /* We have tried hard enough, and just can't receive the
8749 packet/notification. Give up. */
8750 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
8752 /* Skip the ack char if we're in no-ack mode. */
8753 if (!rs->noack_mode)
8754 remote_serial_write ("+", 1);
8758 /* If we got an ordinary packet, return that to our caller. */
8763 struct cleanup *old_chain;
8766 str = escape_buffer (*buf, val);
8767 old_chain = make_cleanup (xfree, str);
8768 fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str);
8769 do_cleanups (old_chain);
8772 /* Skip the ack char if we're in no-ack mode. */
8773 if (!rs->noack_mode)
8774 remote_serial_write ("+", 1);
8775 if (is_notif != NULL)
8780 /* If we got a notification, handle it, and go back to looking
8784 gdb_assert (c == '%');
8788 struct cleanup *old_chain;
8791 str = escape_buffer (*buf, val);
8792 old_chain = make_cleanup (xfree, str);
8793 fprintf_unfiltered (gdb_stdlog,
8794 " Notification received: %s\n",
8796 do_cleanups (old_chain);
8798 if (is_notif != NULL)
8801 handle_notification (rs->notif_state, *buf);
8803 /* Notifications require no acknowledgement. */
8805 if (expecting_notif)
8812 getpkt_sane (char **buf, long *sizeof_buf, int forever)
8814 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0, NULL);
8818 getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever,
8821 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1,
8825 /* Check whether EVENT is a fork event for the process specified
8826 by the pid passed in DATA, and if it is, kill the fork child. */
8829 kill_child_of_pending_fork (QUEUE (stop_reply_p) *q,
8830 QUEUE_ITER (stop_reply_p) *iter,
8834 struct queue_iter_param *param = (struct queue_iter_param *) data;
8835 int parent_pid = *(int *) param->input;
8837 if (is_pending_fork_parent (&event->ws, parent_pid, event->ptid))
8839 struct remote_state *rs = get_remote_state ();
8840 int child_pid = ptid_get_pid (event->ws.value.related_pid);
8843 res = remote_vkill (child_pid, rs);
8845 error (_("Can't kill fork child process %d"), child_pid);
8851 /* Kill any new fork children of process PID that haven't been
8852 processed by follow_fork. */
8855 kill_new_fork_children (int pid, struct remote_state *rs)
8857 struct thread_info *thread;
8858 struct notif_client *notif = ¬if_client_stop;
8859 struct queue_iter_param param;
8861 /* Kill the fork child threads of any threads in process PID
8862 that are stopped at a fork event. */
8863 ALL_NON_EXITED_THREADS (thread)
8865 struct target_waitstatus *ws = &thread->pending_follow;
8867 if (is_pending_fork_parent (ws, pid, thread->ptid))
8869 struct remote_state *rs = get_remote_state ();
8870 int child_pid = ptid_get_pid (ws->value.related_pid);
8873 res = remote_vkill (child_pid, rs);
8875 error (_("Can't kill fork child process %d"), child_pid);
8879 /* Check for any pending fork events (not reported or processed yet)
8880 in process PID and kill those fork child threads as well. */
8881 remote_notif_get_pending_events (notif);
8883 param.output = NULL;
8884 QUEUE_iterate (stop_reply_p, stop_reply_queue,
8885 kill_child_of_pending_fork, ¶m);
8889 /* Target hook to kill the current inferior. */
8892 remote_kill (struct target_ops *ops)
8895 int pid = ptid_get_pid (inferior_ptid);
8896 struct remote_state *rs = get_remote_state ();
8898 if (packet_support (PACKET_vKill) != PACKET_DISABLE)
8900 /* If we're stopped while forking and we haven't followed yet,
8901 kill the child task. We need to do this before killing the
8902 parent task because if this is a vfork then the parent will
8904 kill_new_fork_children (pid, rs);
8906 res = remote_vkill (pid, rs);
8909 target_mourn_inferior ();
8914 /* If we are in 'target remote' mode and we are killing the only
8915 inferior, then we will tell gdbserver to exit and unpush the
8917 if (res == -1 && !remote_multi_process_p (rs)
8918 && number_of_live_inferiors () == 1)
8922 /* We've killed the remote end, we get to mourn it. If we are
8923 not in extended mode, mourning the inferior also unpushes
8924 remote_ops from the target stack, which closes the remote
8926 target_mourn_inferior ();
8931 error (_("Can't kill process"));
8934 /* Send a kill request to the target using the 'vKill' packet. */
8937 remote_vkill (int pid, struct remote_state *rs)
8939 if (packet_support (PACKET_vKill) == PACKET_DISABLE)
8942 /* Tell the remote target to detach. */
8943 xsnprintf (rs->buf, get_remote_packet_size (), "vKill;%x", pid);
8945 getpkt (&rs->buf, &rs->buf_size, 0);
8947 switch (packet_ok (rs->buf,
8948 &remote_protocol_packets[PACKET_vKill]))
8954 case PACKET_UNKNOWN:
8957 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
8961 /* Send a kill request to the target using the 'k' packet. */
8964 remote_kill_k (void)
8966 /* Catch errors so the user can quit from gdb even when we
8967 aren't on speaking terms with the remote system. */
8972 CATCH (ex, RETURN_MASK_ERROR)
8974 if (ex.error == TARGET_CLOSE_ERROR)
8976 /* If we got an (EOF) error that caused the target
8977 to go away, then we're done, that's what we wanted.
8978 "k" is susceptible to cause a premature EOF, given
8979 that the remote server isn't actually required to
8980 reply to "k", and it can happen that it doesn't
8981 even get to reply ACK to the "k". */
8985 /* Otherwise, something went wrong. We didn't actually kill
8986 the target. Just propagate the exception, and let the
8987 user or higher layers decide what to do. */
8988 throw_exception (ex);
8994 remote_mourn (struct target_ops *target)
8996 struct remote_state *rs = get_remote_state ();
8998 /* In 'target remote' mode with one inferior, we close the connection. */
8999 if (!rs->extended && number_of_live_inferiors () <= 1)
9001 unpush_target (target);
9003 /* remote_close takes care of doing most of the clean up. */
9004 generic_mourn_inferior ();
9008 /* In case we got here due to an error, but we're going to stay
9010 rs->waiting_for_stop_reply = 0;
9012 /* If the current general thread belonged to the process we just
9013 detached from or has exited, the remote side current general
9014 thread becomes undefined. Considering a case like this:
9016 - We just got here due to a detach.
9017 - The process that we're detaching from happens to immediately
9018 report a global breakpoint being hit in non-stop mode, in the
9019 same thread we had selected before.
9020 - GDB attaches to this process again.
9021 - This event happens to be the next event we handle.
9023 GDB would consider that the current general thread didn't need to
9024 be set on the stub side (with Hg), since for all it knew,
9025 GENERAL_THREAD hadn't changed.
9027 Notice that although in all-stop mode, the remote server always
9028 sets the current thread to the thread reporting the stop event,
9029 that doesn't happen in non-stop mode; in non-stop, the stub *must
9030 not* change the current thread when reporting a breakpoint hit,
9031 due to the decoupling of event reporting and event handling.
9033 To keep things simple, we always invalidate our notion of the
9035 record_currthread (rs, minus_one_ptid);
9037 /* Call common code to mark the inferior as not running. */
9038 generic_mourn_inferior ();
9040 if (!have_inferiors ())
9042 if (!remote_multi_process_p (rs))
9044 /* Check whether the target is running now - some remote stubs
9045 automatically restart after kill. */
9047 getpkt (&rs->buf, &rs->buf_size, 0);
9049 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
9051 /* Assume that the target has been restarted. Set
9052 inferior_ptid so that bits of core GDB realizes
9053 there's something here, e.g., so that the user can
9054 say "kill" again. */
9055 inferior_ptid = magic_null_ptid;
9062 extended_remote_supports_disable_randomization (struct target_ops *self)
9064 return packet_support (PACKET_QDisableRandomization) == PACKET_ENABLE;
9068 extended_remote_disable_randomization (int val)
9070 struct remote_state *rs = get_remote_state ();
9073 xsnprintf (rs->buf, get_remote_packet_size (), "QDisableRandomization:%x",
9076 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
9078 error (_("Target does not support QDisableRandomization."));
9079 if (strcmp (reply, "OK") != 0)
9080 error (_("Bogus QDisableRandomization reply from target: %s"), reply);
9084 extended_remote_run (char *args)
9086 struct remote_state *rs = get_remote_state ();
9088 const char *remote_exec_file = get_remote_exec_file ();
9090 /* If the user has disabled vRun support, or we have detected that
9091 support is not available, do not try it. */
9092 if (packet_support (PACKET_vRun) == PACKET_DISABLE)
9095 strcpy (rs->buf, "vRun;");
9096 len = strlen (rs->buf);
9098 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
9099 error (_("Remote file name too long for run packet"));
9100 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len,
9101 strlen (remote_exec_file));
9103 gdb_assert (args != NULL);
9106 struct cleanup *back_to;
9110 argv = gdb_buildargv (args);
9111 back_to = make_cleanup_freeargv (argv);
9112 for (i = 0; argv[i] != NULL; i++)
9114 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
9115 error (_("Argument list too long for run packet"));
9116 rs->buf[len++] = ';';
9117 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len,
9120 do_cleanups (back_to);
9123 rs->buf[len++] = '\0';
9126 getpkt (&rs->buf, &rs->buf_size, 0);
9128 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]))
9131 /* We have a wait response. All is well. */
9133 case PACKET_UNKNOWN:
9136 if (remote_exec_file[0] == '\0')
9137 error (_("Running the default executable on the remote target failed; "
9138 "try \"set remote exec-file\"?"));
9140 error (_("Running \"%s\" on the remote target failed"),
9143 gdb_assert_not_reached (_("bad switch"));
9147 /* In the extended protocol we want to be able to do things like
9148 "run" and have them basically work as expected. So we need
9149 a special create_inferior function. We support changing the
9150 executable file and the command line arguments, but not the
9154 extended_remote_create_inferior (struct target_ops *ops,
9155 char *exec_file, char *args,
9156 char **env, int from_tty)
9160 struct remote_state *rs = get_remote_state ();
9161 const char *remote_exec_file = get_remote_exec_file ();
9163 /* If running asynchronously, register the target file descriptor
9164 with the event loop. */
9165 if (target_can_async_p ())
9168 /* Disable address space randomization if requested (and supported). */
9169 if (extended_remote_supports_disable_randomization (ops))
9170 extended_remote_disable_randomization (disable_randomization);
9172 /* Now restart the remote server. */
9173 run_worked = extended_remote_run (args) != -1;
9176 /* vRun was not supported. Fail if we need it to do what the
9178 if (remote_exec_file[0])
9179 error (_("Remote target does not support \"set remote exec-file\""));
9181 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9183 /* Fall back to "R". */
9184 extended_remote_restart ();
9187 if (!have_inferiors ())
9189 /* Clean up from the last time we ran, before we mark the target
9190 running again. This will mark breakpoints uninserted, and
9191 get_offsets may insert breakpoints. */
9192 init_thread_list ();
9193 init_wait_for_inferior ();
9196 /* vRun's success return is a stop reply. */
9197 stop_reply = run_worked ? rs->buf : NULL;
9198 add_current_inferior_and_thread (stop_reply);
9200 /* Get updated offsets, if the stub uses qOffsets. */
9205 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9206 the list of conditions (in agent expression bytecode format), if any, the
9207 target needs to evaluate. The output is placed into the packet buffer
9208 started from BUF and ended at BUF_END. */
9211 remote_add_target_side_condition (struct gdbarch *gdbarch,
9212 struct bp_target_info *bp_tgt, char *buf,
9215 struct agent_expr *aexpr = NULL;
9218 if (VEC_empty (agent_expr_p, bp_tgt->conditions))
9221 buf += strlen (buf);
9222 xsnprintf (buf, buf_end - buf, "%s", ";");
9225 /* Send conditions to the target and free the vector. */
9227 VEC_iterate (agent_expr_p, bp_tgt->conditions, ix, aexpr);
9230 xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len);
9231 buf += strlen (buf);
9232 for (i = 0; i < aexpr->len; ++i)
9233 buf = pack_hex_byte (buf, aexpr->buf[i]);
9240 remote_add_target_side_commands (struct gdbarch *gdbarch,
9241 struct bp_target_info *bp_tgt, char *buf)
9243 struct agent_expr *aexpr = NULL;
9246 if (VEC_empty (agent_expr_p, bp_tgt->tcommands))
9249 buf += strlen (buf);
9251 sprintf (buf, ";cmds:%x,", bp_tgt->persist);
9252 buf += strlen (buf);
9254 /* Concatenate all the agent expressions that are commands into the
9257 VEC_iterate (agent_expr_p, bp_tgt->tcommands, ix, aexpr);
9260 sprintf (buf, "X%x,", aexpr->len);
9261 buf += strlen (buf);
9262 for (i = 0; i < aexpr->len; ++i)
9263 buf = pack_hex_byte (buf, aexpr->buf[i]);
9268 /* Insert a breakpoint. On targets that have software breakpoint
9269 support, we ask the remote target to do the work; on targets
9270 which don't, we insert a traditional memory breakpoint. */
9273 remote_insert_breakpoint (struct target_ops *ops,
9274 struct gdbarch *gdbarch,
9275 struct bp_target_info *bp_tgt)
9277 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9278 If it succeeds, then set the support to PACKET_ENABLE. If it
9279 fails, and the user has explicitly requested the Z support then
9280 report an error, otherwise, mark it disabled and go on. */
9282 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
9284 CORE_ADDR addr = bp_tgt->reqstd_address;
9285 struct remote_state *rs;
9289 /* Make sure the remote is pointing at the right process, if
9291 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9292 set_general_process ();
9294 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
9296 rs = get_remote_state ();
9298 endbuf = rs->buf + get_remote_packet_size ();
9303 addr = (ULONGEST) remote_address_masked (addr);
9304 p += hexnumstr (p, addr);
9305 xsnprintf (p, endbuf - p, ",%d", bpsize);
9307 if (remote_supports_cond_breakpoints (ops))
9308 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
9310 if (remote_can_run_breakpoint_commands (ops))
9311 remote_add_target_side_commands (gdbarch, bp_tgt, p);
9314 getpkt (&rs->buf, &rs->buf_size, 0);
9316 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
9321 bp_tgt->placed_address = addr;
9322 bp_tgt->placed_size = bpsize;
9324 case PACKET_UNKNOWN:
9329 /* If this breakpoint has target-side commands but this stub doesn't
9330 support Z0 packets, throw error. */
9331 if (!VEC_empty (agent_expr_p, bp_tgt->tcommands))
9332 throw_error (NOT_SUPPORTED_ERROR, _("\
9333 Target doesn't support breakpoints that have target side commands."));
9335 return memory_insert_breakpoint (ops, gdbarch, bp_tgt);
9339 remote_remove_breakpoint (struct target_ops *ops,
9340 struct gdbarch *gdbarch,
9341 struct bp_target_info *bp_tgt)
9343 CORE_ADDR addr = bp_tgt->placed_address;
9344 struct remote_state *rs = get_remote_state ();
9346 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
9349 char *endbuf = rs->buf + get_remote_packet_size ();
9351 /* Make sure the remote is pointing at the right process, if
9353 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9354 set_general_process ();
9360 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
9361 p += hexnumstr (p, addr);
9362 xsnprintf (p, endbuf - p, ",%d", bp_tgt->placed_size);
9365 getpkt (&rs->buf, &rs->buf_size, 0);
9367 return (rs->buf[0] == 'E');
9370 return memory_remove_breakpoint (ops, gdbarch, bp_tgt);
9373 static enum Z_packet_type
9374 watchpoint_to_Z_packet (int type)
9379 return Z_PACKET_WRITE_WP;
9382 return Z_PACKET_READ_WP;
9385 return Z_PACKET_ACCESS_WP;
9388 internal_error (__FILE__, __LINE__,
9389 _("hw_bp_to_z: bad watchpoint type %d"), type);
9394 remote_insert_watchpoint (struct target_ops *self, CORE_ADDR addr, int len,
9395 enum target_hw_bp_type type, struct expression *cond)
9397 struct remote_state *rs = get_remote_state ();
9398 char *endbuf = rs->buf + get_remote_packet_size ();
9400 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
9402 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
9405 /* Make sure the remote is pointing at the right process, if
9407 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9408 set_general_process ();
9410 xsnprintf (rs->buf, endbuf - rs->buf, "Z%x,", packet);
9411 p = strchr (rs->buf, '\0');
9412 addr = remote_address_masked (addr);
9413 p += hexnumstr (p, (ULONGEST) addr);
9414 xsnprintf (p, endbuf - p, ",%x", len);
9417 getpkt (&rs->buf, &rs->buf_size, 0);
9419 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
9423 case PACKET_UNKNOWN:
9428 internal_error (__FILE__, __LINE__,
9429 _("remote_insert_watchpoint: reached end of function"));
9433 remote_watchpoint_addr_within_range (struct target_ops *target, CORE_ADDR addr,
9434 CORE_ADDR start, int length)
9436 CORE_ADDR diff = remote_address_masked (addr - start);
9438 return diff < length;
9443 remote_remove_watchpoint (struct target_ops *self, CORE_ADDR addr, int len,
9444 enum target_hw_bp_type type, struct expression *cond)
9446 struct remote_state *rs = get_remote_state ();
9447 char *endbuf = rs->buf + get_remote_packet_size ();
9449 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
9451 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
9454 /* Make sure the remote is pointing at the right process, if
9456 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9457 set_general_process ();
9459 xsnprintf (rs->buf, endbuf - rs->buf, "z%x,", packet);
9460 p = strchr (rs->buf, '\0');
9461 addr = remote_address_masked (addr);
9462 p += hexnumstr (p, (ULONGEST) addr);
9463 xsnprintf (p, endbuf - p, ",%x", len);
9465 getpkt (&rs->buf, &rs->buf_size, 0);
9467 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
9470 case PACKET_UNKNOWN:
9475 internal_error (__FILE__, __LINE__,
9476 _("remote_remove_watchpoint: reached end of function"));
9480 int remote_hw_watchpoint_limit = -1;
9481 int remote_hw_watchpoint_length_limit = -1;
9482 int remote_hw_breakpoint_limit = -1;
9485 remote_region_ok_for_hw_watchpoint (struct target_ops *self,
9486 CORE_ADDR addr, int len)
9488 if (remote_hw_watchpoint_length_limit == 0)
9490 else if (remote_hw_watchpoint_length_limit < 0)
9492 else if (len <= remote_hw_watchpoint_length_limit)
9499 remote_check_watch_resources (struct target_ops *self,
9500 enum bptype type, int cnt, int ot)
9502 if (type == bp_hardware_breakpoint)
9504 if (remote_hw_breakpoint_limit == 0)
9506 else if (remote_hw_breakpoint_limit < 0)
9508 else if (cnt <= remote_hw_breakpoint_limit)
9513 if (remote_hw_watchpoint_limit == 0)
9515 else if (remote_hw_watchpoint_limit < 0)
9519 else if (cnt <= remote_hw_watchpoint_limit)
9525 /* The to_stopped_by_sw_breakpoint method of target remote. */
9528 remote_stopped_by_sw_breakpoint (struct target_ops *ops)
9530 struct thread_info *thread = inferior_thread ();
9532 return (thread->priv != NULL
9533 && thread->priv->stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT);
9536 /* The to_supports_stopped_by_sw_breakpoint method of target
9540 remote_supports_stopped_by_sw_breakpoint (struct target_ops *ops)
9542 return (packet_support (PACKET_swbreak_feature) == PACKET_ENABLE);
9545 /* The to_stopped_by_hw_breakpoint method of target remote. */
9548 remote_stopped_by_hw_breakpoint (struct target_ops *ops)
9550 struct thread_info *thread = inferior_thread ();
9552 return (thread->priv != NULL
9553 && thread->priv->stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT);
9556 /* The to_supports_stopped_by_hw_breakpoint method of target
9560 remote_supports_stopped_by_hw_breakpoint (struct target_ops *ops)
9562 return (packet_support (PACKET_hwbreak_feature) == PACKET_ENABLE);
9566 remote_stopped_by_watchpoint (struct target_ops *ops)
9568 struct thread_info *thread = inferior_thread ();
9570 return (thread->priv != NULL
9571 && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT);
9575 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
9577 struct thread_info *thread = inferior_thread ();
9579 if (thread->priv != NULL
9580 && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT)
9582 *addr_p = thread->priv->watch_data_address;
9591 remote_insert_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
9592 struct bp_target_info *bp_tgt)
9594 CORE_ADDR addr = bp_tgt->reqstd_address;
9595 struct remote_state *rs;
9600 /* The length field should be set to the size of a breakpoint
9601 instruction, even though we aren't inserting one ourselves. */
9603 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
9605 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
9608 /* Make sure the remote is pointing at the right process, if
9610 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9611 set_general_process ();
9613 rs = get_remote_state ();
9615 endbuf = rs->buf + get_remote_packet_size ();
9621 addr = remote_address_masked (addr);
9622 p += hexnumstr (p, (ULONGEST) addr);
9623 xsnprintf (p, endbuf - p, ",%x", bpsize);
9625 if (remote_supports_cond_breakpoints (self))
9626 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
9628 if (remote_can_run_breakpoint_commands (self))
9629 remote_add_target_side_commands (gdbarch, bp_tgt, p);
9632 getpkt (&rs->buf, &rs->buf_size, 0);
9634 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
9637 if (rs->buf[1] == '.')
9639 message = strchr (rs->buf + 2, '.');
9641 error (_("Remote failure reply: %s"), message + 1);
9644 case PACKET_UNKNOWN:
9647 bp_tgt->placed_address = addr;
9648 bp_tgt->placed_size = bpsize;
9651 internal_error (__FILE__, __LINE__,
9652 _("remote_insert_hw_breakpoint: reached end of function"));
9657 remote_remove_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
9658 struct bp_target_info *bp_tgt)
9661 struct remote_state *rs = get_remote_state ();
9663 char *endbuf = rs->buf + get_remote_packet_size ();
9665 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
9668 /* Make sure the remote is pointing at the right process, if
9670 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9671 set_general_process ();
9677 addr = remote_address_masked (bp_tgt->placed_address);
9678 p += hexnumstr (p, (ULONGEST) addr);
9679 xsnprintf (p, endbuf - p, ",%x", bp_tgt->placed_size);
9682 getpkt (&rs->buf, &rs->buf_size, 0);
9684 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
9687 case PACKET_UNKNOWN:
9692 internal_error (__FILE__, __LINE__,
9693 _("remote_remove_hw_breakpoint: reached end of function"));
9696 /* Verify memory using the "qCRC:" request. */
9699 remote_verify_memory (struct target_ops *ops,
9700 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
9702 struct remote_state *rs = get_remote_state ();
9703 unsigned long host_crc, target_crc;
9706 /* It doesn't make sense to use qCRC if the remote target is
9707 connected but not running. */
9708 if (target_has_execution && packet_support (PACKET_qCRC) != PACKET_DISABLE)
9710 enum packet_result result;
9712 /* Make sure the remote is pointing at the right process. */
9713 set_general_process ();
9715 /* FIXME: assumes lma can fit into long. */
9716 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
9717 (long) lma, (long) size);
9720 /* Be clever; compute the host_crc before waiting for target
9722 host_crc = xcrc32 (data, size, 0xffffffff);
9724 getpkt (&rs->buf, &rs->buf_size, 0);
9726 result = packet_ok (rs->buf,
9727 &remote_protocol_packets[PACKET_qCRC]);
9728 if (result == PACKET_ERROR)
9730 else if (result == PACKET_OK)
9732 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
9733 target_crc = target_crc * 16 + fromhex (*tmp);
9735 return (host_crc == target_crc);
9739 return simple_verify_memory (ops, data, lma, size);
9742 /* compare-sections command
9744 With no arguments, compares each loadable section in the exec bfd
9745 with the same memory range on the target, and reports mismatches.
9746 Useful for verifying the image on the target against the exec file. */
9749 compare_sections_command (char *args, int from_tty)
9752 struct cleanup *old_chain;
9754 const char *sectname;
9763 error (_("command cannot be used without an exec file"));
9765 /* Make sure the remote is pointing at the right process. */
9766 set_general_process ();
9768 if (args != NULL && strcmp (args, "-r") == 0)
9774 for (s = exec_bfd->sections; s; s = s->next)
9776 if (!(s->flags & SEC_LOAD))
9777 continue; /* Skip non-loadable section. */
9779 if (read_only && (s->flags & SEC_READONLY) == 0)
9780 continue; /* Skip writeable sections */
9782 size = bfd_get_section_size (s);
9784 continue; /* Skip zero-length section. */
9786 sectname = bfd_get_section_name (exec_bfd, s);
9787 if (args && strcmp (args, sectname) != 0)
9788 continue; /* Not the section selected by user. */
9790 matched = 1; /* Do this section. */
9793 sectdata = (gdb_byte *) xmalloc (size);
9794 old_chain = make_cleanup (xfree, sectdata);
9795 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
9797 res = target_verify_memory (sectdata, lma, size);
9800 error (_("target memory fault, section %s, range %s -- %s"), sectname,
9801 paddress (target_gdbarch (), lma),
9802 paddress (target_gdbarch (), lma + size));
9804 printf_filtered ("Section %s, range %s -- %s: ", sectname,
9805 paddress (target_gdbarch (), lma),
9806 paddress (target_gdbarch (), lma + size));
9808 printf_filtered ("matched.\n");
9811 printf_filtered ("MIS-MATCHED!\n");
9815 do_cleanups (old_chain);
9818 warning (_("One or more sections of the target image does not match\n\
9819 the loaded file\n"));
9820 if (args && !matched)
9821 printf_filtered (_("No loaded section named '%s'.\n"), args);
9824 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
9825 into remote target. The number of bytes written to the remote
9826 target is returned, or -1 for error. */
9828 static enum target_xfer_status
9829 remote_write_qxfer (struct target_ops *ops, const char *object_name,
9830 const char *annex, const gdb_byte *writebuf,
9831 ULONGEST offset, LONGEST len, ULONGEST *xfered_len,
9832 struct packet_config *packet)
9836 struct remote_state *rs = get_remote_state ();
9837 int max_size = get_memory_write_packet_size ();
9839 if (packet->support == PACKET_DISABLE)
9840 return TARGET_XFER_E_IO;
9842 /* Insert header. */
9843 i = snprintf (rs->buf, max_size,
9844 "qXfer:%s:write:%s:%s:",
9845 object_name, annex ? annex : "",
9846 phex_nz (offset, sizeof offset));
9847 max_size -= (i + 1);
9849 /* Escape as much data as fits into rs->buf. */
9850 buf_len = remote_escape_output
9851 (writebuf, len, 1, (gdb_byte *) rs->buf + i, &max_size, max_size);
9853 if (putpkt_binary (rs->buf, i + buf_len) < 0
9854 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
9855 || packet_ok (rs->buf, packet) != PACKET_OK)
9856 return TARGET_XFER_E_IO;
9858 unpack_varlen_hex (rs->buf, &n);
9861 return TARGET_XFER_OK;
9864 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
9865 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
9866 number of bytes read is returned, or 0 for EOF, or -1 for error.
9867 The number of bytes read may be less than LEN without indicating an
9868 EOF. PACKET is checked and updated to indicate whether the remote
9869 target supports this object. */
9871 static enum target_xfer_status
9872 remote_read_qxfer (struct target_ops *ops, const char *object_name,
9874 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
9875 ULONGEST *xfered_len,
9876 struct packet_config *packet)
9878 struct remote_state *rs = get_remote_state ();
9879 LONGEST i, n, packet_len;
9881 if (packet->support == PACKET_DISABLE)
9882 return TARGET_XFER_E_IO;
9884 /* Check whether we've cached an end-of-object packet that matches
9886 if (rs->finished_object)
9888 if (strcmp (object_name, rs->finished_object) == 0
9889 && strcmp (annex ? annex : "", rs->finished_annex) == 0
9890 && offset == rs->finished_offset)
9891 return TARGET_XFER_EOF;
9894 /* Otherwise, we're now reading something different. Discard
9896 xfree (rs->finished_object);
9897 xfree (rs->finished_annex);
9898 rs->finished_object = NULL;
9899 rs->finished_annex = NULL;
9902 /* Request only enough to fit in a single packet. The actual data
9903 may not, since we don't know how much of it will need to be escaped;
9904 the target is free to respond with slightly less data. We subtract
9905 five to account for the response type and the protocol frame. */
9906 n = min (get_remote_packet_size () - 5, len);
9907 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
9908 object_name, annex ? annex : "",
9909 phex_nz (offset, sizeof offset),
9910 phex_nz (n, sizeof n));
9911 i = putpkt (rs->buf);
9913 return TARGET_XFER_E_IO;
9916 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
9917 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
9918 return TARGET_XFER_E_IO;
9920 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
9921 error (_("Unknown remote qXfer reply: %s"), rs->buf);
9923 /* 'm' means there is (or at least might be) more data after this
9924 batch. That does not make sense unless there's at least one byte
9925 of data in this reply. */
9926 if (rs->buf[0] == 'm' && packet_len == 1)
9927 error (_("Remote qXfer reply contained no data."));
9929 /* Got some data. */
9930 i = remote_unescape_input ((gdb_byte *) rs->buf + 1,
9931 packet_len - 1, readbuf, n);
9933 /* 'l' is an EOF marker, possibly including a final block of data,
9934 or possibly empty. If we have the final block of a non-empty
9935 object, record this fact to bypass a subsequent partial read. */
9936 if (rs->buf[0] == 'l' && offset + i > 0)
9938 rs->finished_object = xstrdup (object_name);
9939 rs->finished_annex = xstrdup (annex ? annex : "");
9940 rs->finished_offset = offset + i;
9944 return TARGET_XFER_EOF;
9948 return TARGET_XFER_OK;
9952 static enum target_xfer_status
9953 remote_xfer_partial (struct target_ops *ops, enum target_object object,
9954 const char *annex, gdb_byte *readbuf,
9955 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
9956 ULONGEST *xfered_len)
9958 struct remote_state *rs;
9962 int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
9964 set_remote_traceframe ();
9965 set_general_thread (inferior_ptid);
9967 rs = get_remote_state ();
9969 /* Handle memory using the standard memory routines. */
9970 if (object == TARGET_OBJECT_MEMORY)
9972 /* If the remote target is connected but not running, we should
9973 pass this request down to a lower stratum (e.g. the executable
9975 if (!target_has_execution)
9976 return TARGET_XFER_EOF;
9978 if (writebuf != NULL)
9979 return remote_write_bytes (offset, writebuf, len, unit_size,
9982 return remote_read_bytes (ops, offset, readbuf, len, unit_size,
9986 /* Handle SPU memory using qxfer packets. */
9987 if (object == TARGET_OBJECT_SPU)
9990 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
9991 xfered_len, &remote_protocol_packets
9992 [PACKET_qXfer_spu_read]);
9994 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
9995 xfered_len, &remote_protocol_packets
9996 [PACKET_qXfer_spu_write]);
9999 /* Handle extra signal info using qxfer packets. */
10000 if (object == TARGET_OBJECT_SIGNAL_INFO)
10003 return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len,
10004 xfered_len, &remote_protocol_packets
10005 [PACKET_qXfer_siginfo_read]);
10007 return remote_write_qxfer (ops, "siginfo", annex,
10008 writebuf, offset, len, xfered_len,
10009 &remote_protocol_packets
10010 [PACKET_qXfer_siginfo_write]);
10013 if (object == TARGET_OBJECT_STATIC_TRACE_DATA)
10016 return remote_read_qxfer (ops, "statictrace", annex,
10017 readbuf, offset, len, xfered_len,
10018 &remote_protocol_packets
10019 [PACKET_qXfer_statictrace_read]);
10021 return TARGET_XFER_E_IO;
10024 /* Only handle flash writes. */
10025 if (writebuf != NULL)
10029 case TARGET_OBJECT_FLASH:
10030 return remote_flash_write (ops, offset, len, xfered_len,
10034 return TARGET_XFER_E_IO;
10038 /* Map pre-existing objects onto letters. DO NOT do this for new
10039 objects!!! Instead specify new query packets. */
10042 case TARGET_OBJECT_AVR:
10046 case TARGET_OBJECT_AUXV:
10047 gdb_assert (annex == NULL);
10048 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
10050 &remote_protocol_packets[PACKET_qXfer_auxv]);
10052 case TARGET_OBJECT_AVAILABLE_FEATURES:
10053 return remote_read_qxfer
10054 (ops, "features", annex, readbuf, offset, len, xfered_len,
10055 &remote_protocol_packets[PACKET_qXfer_features]);
10057 case TARGET_OBJECT_LIBRARIES:
10058 return remote_read_qxfer
10059 (ops, "libraries", annex, readbuf, offset, len, xfered_len,
10060 &remote_protocol_packets[PACKET_qXfer_libraries]);
10062 case TARGET_OBJECT_LIBRARIES_SVR4:
10063 return remote_read_qxfer
10064 (ops, "libraries-svr4", annex, readbuf, offset, len, xfered_len,
10065 &remote_protocol_packets[PACKET_qXfer_libraries_svr4]);
10067 case TARGET_OBJECT_MEMORY_MAP:
10068 gdb_assert (annex == NULL);
10069 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
10071 &remote_protocol_packets[PACKET_qXfer_memory_map]);
10073 case TARGET_OBJECT_OSDATA:
10074 /* Should only get here if we're connected. */
10075 gdb_assert (rs->remote_desc);
10076 return remote_read_qxfer
10077 (ops, "osdata", annex, readbuf, offset, len, xfered_len,
10078 &remote_protocol_packets[PACKET_qXfer_osdata]);
10080 case TARGET_OBJECT_THREADS:
10081 gdb_assert (annex == NULL);
10082 return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len,
10084 &remote_protocol_packets[PACKET_qXfer_threads]);
10086 case TARGET_OBJECT_TRACEFRAME_INFO:
10087 gdb_assert (annex == NULL);
10088 return remote_read_qxfer
10089 (ops, "traceframe-info", annex, readbuf, offset, len, xfered_len,
10090 &remote_protocol_packets[PACKET_qXfer_traceframe_info]);
10092 case TARGET_OBJECT_FDPIC:
10093 return remote_read_qxfer (ops, "fdpic", annex, readbuf, offset, len,
10095 &remote_protocol_packets[PACKET_qXfer_fdpic]);
10097 case TARGET_OBJECT_OPENVMS_UIB:
10098 return remote_read_qxfer (ops, "uib", annex, readbuf, offset, len,
10100 &remote_protocol_packets[PACKET_qXfer_uib]);
10102 case TARGET_OBJECT_BTRACE:
10103 return remote_read_qxfer (ops, "btrace", annex, readbuf, offset, len,
10105 &remote_protocol_packets[PACKET_qXfer_btrace]);
10107 case TARGET_OBJECT_BTRACE_CONF:
10108 return remote_read_qxfer (ops, "btrace-conf", annex, readbuf, offset,
10110 &remote_protocol_packets[PACKET_qXfer_btrace_conf]);
10112 case TARGET_OBJECT_EXEC_FILE:
10113 return remote_read_qxfer (ops, "exec-file", annex, readbuf, offset,
10115 &remote_protocol_packets[PACKET_qXfer_exec_file]);
10118 return TARGET_XFER_E_IO;
10121 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10122 large enough let the caller deal with it. */
10123 if (len < get_remote_packet_size ())
10124 return TARGET_XFER_E_IO;
10125 len = get_remote_packet_size ();
10127 /* Except for querying the minimum buffer size, target must be open. */
10128 if (!rs->remote_desc)
10129 error (_("remote query is only available after target open"));
10131 gdb_assert (annex != NULL);
10132 gdb_assert (readbuf != NULL);
10136 *p2++ = query_type;
10138 /* We used one buffer char for the remote protocol q command and
10139 another for the query type. As the remote protocol encapsulation
10140 uses 4 chars plus one extra in case we are debugging
10141 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10144 while (annex[i] && (i < (get_remote_packet_size () - 8)))
10146 /* Bad caller may have sent forbidden characters. */
10147 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
10152 gdb_assert (annex[i] == '\0');
10154 i = putpkt (rs->buf);
10156 return TARGET_XFER_E_IO;
10158 getpkt (&rs->buf, &rs->buf_size, 0);
10159 strcpy ((char *) readbuf, rs->buf);
10161 *xfered_len = strlen ((char *) readbuf);
10162 return TARGET_XFER_OK;
10166 remote_search_memory (struct target_ops* ops,
10167 CORE_ADDR start_addr, ULONGEST search_space_len,
10168 const gdb_byte *pattern, ULONGEST pattern_len,
10169 CORE_ADDR *found_addrp)
10171 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
10172 struct remote_state *rs = get_remote_state ();
10173 int max_size = get_memory_write_packet_size ();
10174 struct packet_config *packet =
10175 &remote_protocol_packets[PACKET_qSearch_memory];
10176 /* Number of packet bytes used to encode the pattern;
10177 this could be more than PATTERN_LEN due to escape characters. */
10178 int escaped_pattern_len;
10179 /* Amount of pattern that was encodable in the packet. */
10180 int used_pattern_len;
10183 ULONGEST found_addr;
10185 /* Don't go to the target if we don't have to.
10186 This is done before checking packet->support to avoid the possibility that
10187 a success for this edge case means the facility works in general. */
10188 if (pattern_len > search_space_len)
10190 if (pattern_len == 0)
10192 *found_addrp = start_addr;
10196 /* If we already know the packet isn't supported, fall back to the simple
10197 way of searching memory. */
10199 if (packet_config_support (packet) == PACKET_DISABLE)
10201 /* Target doesn't provided special support, fall back and use the
10202 standard support (copy memory and do the search here). */
10203 return simple_search_memory (ops, start_addr, search_space_len,
10204 pattern, pattern_len, found_addrp);
10207 /* Make sure the remote is pointing at the right process. */
10208 set_general_process ();
10210 /* Insert header. */
10211 i = snprintf (rs->buf, max_size,
10212 "qSearch:memory:%s;%s;",
10213 phex_nz (start_addr, addr_size),
10214 phex_nz (search_space_len, sizeof (search_space_len)));
10215 max_size -= (i + 1);
10217 /* Escape as much data as fits into rs->buf. */
10218 escaped_pattern_len =
10219 remote_escape_output (pattern, pattern_len, 1, (gdb_byte *) rs->buf + i,
10220 &used_pattern_len, max_size);
10222 /* Bail if the pattern is too large. */
10223 if (used_pattern_len != pattern_len)
10224 error (_("Pattern is too large to transmit to remote target."));
10226 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
10227 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
10228 || packet_ok (rs->buf, packet) != PACKET_OK)
10230 /* The request may not have worked because the command is not
10231 supported. If so, fall back to the simple way. */
10232 if (packet->support == PACKET_DISABLE)
10234 return simple_search_memory (ops, start_addr, search_space_len,
10235 pattern, pattern_len, found_addrp);
10240 if (rs->buf[0] == '0')
10242 else if (rs->buf[0] == '1')
10245 if (rs->buf[1] != ',')
10246 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
10247 unpack_varlen_hex (rs->buf + 2, &found_addr);
10248 *found_addrp = found_addr;
10251 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
10257 remote_rcmd (struct target_ops *self, const char *command,
10258 struct ui_file *outbuf)
10260 struct remote_state *rs = get_remote_state ();
10263 if (!rs->remote_desc)
10264 error (_("remote rcmd is only available after target open"));
10266 /* Send a NULL command across as an empty command. */
10267 if (command == NULL)
10270 /* The query prefix. */
10271 strcpy (rs->buf, "qRcmd,");
10272 p = strchr (rs->buf, '\0');
10274 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/)
10275 > get_remote_packet_size ())
10276 error (_("\"monitor\" command ``%s'' is too long."), command);
10278 /* Encode the actual command. */
10279 bin2hex ((const gdb_byte *) command, p, strlen (command));
10281 if (putpkt (rs->buf) < 0)
10282 error (_("Communication problem with target."));
10284 /* get/display the response */
10289 /* XXX - see also remote_get_noisy_reply(). */
10290 QUIT; /* Allow user to bail out with ^C. */
10292 if (getpkt_sane (&rs->buf, &rs->buf_size, 0) == -1)
10294 /* Timeout. Continue to (try to) read responses.
10295 This is better than stopping with an error, assuming the stub
10296 is still executing the (long) monitor command.
10297 If needed, the user can interrupt gdb using C-c, obtaining
10298 an effect similar to stop on timeout. */
10302 if (buf[0] == '\0')
10303 error (_("Target does not support this command."));
10304 if (buf[0] == 'O' && buf[1] != 'K')
10306 remote_console_output (buf + 1); /* 'O' message from stub. */
10309 if (strcmp (buf, "OK") == 0)
10311 if (strlen (buf) == 3 && buf[0] == 'E'
10312 && isdigit (buf[1]) && isdigit (buf[2]))
10314 error (_("Protocol error with Rcmd"));
10316 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
10318 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
10320 fputc_unfiltered (c, outbuf);
10326 static VEC(mem_region_s) *
10327 remote_memory_map (struct target_ops *ops)
10329 VEC(mem_region_s) *result = NULL;
10330 char *text = target_read_stralloc (¤t_target,
10331 TARGET_OBJECT_MEMORY_MAP, NULL);
10335 struct cleanup *back_to = make_cleanup (xfree, text);
10337 result = parse_memory_map (text);
10338 do_cleanups (back_to);
10345 packet_command (char *args, int from_tty)
10347 struct remote_state *rs = get_remote_state ();
10349 if (!rs->remote_desc)
10350 error (_("command can only be used with remote target"));
10353 error (_("remote-packet command requires packet text as argument"));
10355 puts_filtered ("sending: ");
10356 print_packet (args);
10357 puts_filtered ("\n");
10360 getpkt (&rs->buf, &rs->buf_size, 0);
10361 puts_filtered ("received: ");
10362 print_packet (rs->buf);
10363 puts_filtered ("\n");
10367 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10369 static void display_thread_info (struct gdb_ext_thread_info *info);
10371 static void threadset_test_cmd (char *cmd, int tty);
10373 static void threadalive_test (char *cmd, int tty);
10375 static void threadlist_test_cmd (char *cmd, int tty);
10377 int get_and_display_threadinfo (threadref *ref);
10379 static void threadinfo_test_cmd (char *cmd, int tty);
10381 static int thread_display_step (threadref *ref, void *context);
10383 static void threadlist_update_test_cmd (char *cmd, int tty);
10385 static void init_remote_threadtests (void);
10387 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10390 threadset_test_cmd (char *cmd, int tty)
10392 int sample_thread = SAMPLE_THREAD;
10394 printf_filtered (_("Remote threadset test\n"));
10395 set_general_thread (sample_thread);
10400 threadalive_test (char *cmd, int tty)
10402 int sample_thread = SAMPLE_THREAD;
10403 int pid = ptid_get_pid (inferior_ptid);
10404 ptid_t ptid = ptid_build (pid, sample_thread, 0);
10406 if (remote_thread_alive (ptid))
10407 printf_filtered ("PASS: Thread alive test\n");
10409 printf_filtered ("FAIL: Thread alive test\n");
10412 void output_threadid (char *title, threadref *ref);
10415 output_threadid (char *title, threadref *ref)
10419 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
10421 printf_filtered ("%s %s\n", title, (&hexid[0]));
10425 threadlist_test_cmd (char *cmd, int tty)
10428 threadref nextthread;
10429 int done, result_count;
10430 threadref threadlist[3];
10432 printf_filtered ("Remote Threadlist test\n");
10433 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
10434 &result_count, &threadlist[0]))
10435 printf_filtered ("FAIL: threadlist test\n");
10438 threadref *scan = threadlist;
10439 threadref *limit = scan + result_count;
10441 while (scan < limit)
10442 output_threadid (" thread ", scan++);
10447 display_thread_info (struct gdb_ext_thread_info *info)
10449 output_threadid ("Threadid: ", &info->threadid);
10450 printf_filtered ("Name: %s\n ", info->shortname);
10451 printf_filtered ("State: %s\n", info->display);
10452 printf_filtered ("other: %s\n\n", info->more_display);
10456 get_and_display_threadinfo (threadref *ref)
10460 struct gdb_ext_thread_info threadinfo;
10462 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
10463 | TAG_MOREDISPLAY | TAG_DISPLAY;
10464 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
10465 display_thread_info (&threadinfo);
10470 threadinfo_test_cmd (char *cmd, int tty)
10472 int athread = SAMPLE_THREAD;
10476 int_to_threadref (&thread, athread);
10477 printf_filtered ("Remote Threadinfo test\n");
10478 if (!get_and_display_threadinfo (&thread))
10479 printf_filtered ("FAIL cannot get thread info\n");
10483 thread_display_step (threadref *ref, void *context)
10485 /* output_threadid(" threadstep ",ref); *//* simple test */
10486 return get_and_display_threadinfo (ref);
10490 threadlist_update_test_cmd (char *cmd, int tty)
10492 printf_filtered ("Remote Threadlist update test\n");
10493 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
10497 init_remote_threadtests (void)
10499 add_com ("tlist", class_obscure, threadlist_test_cmd,
10500 _("Fetch and print the remote list of "
10501 "thread identifiers, one pkt only"));
10502 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
10503 _("Fetch and display info about one thread"));
10504 add_com ("tset", class_obscure, threadset_test_cmd,
10505 _("Test setting to a different thread"));
10506 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
10507 _("Iterate through updating all remote thread info"));
10508 add_com ("talive", class_obscure, threadalive_test,
10509 _(" Remote thread alive test "));
10514 /* Convert a thread ID to a string. Returns the string in a static
10518 remote_pid_to_str (struct target_ops *ops, ptid_t ptid)
10520 static char buf[64];
10521 struct remote_state *rs = get_remote_state ();
10523 if (ptid_equal (ptid, null_ptid))
10524 return normal_pid_to_str (ptid);
10525 else if (ptid_is_pid (ptid))
10527 /* Printing an inferior target id. */
10529 /* When multi-process extensions are off, there's no way in the
10530 remote protocol to know the remote process id, if there's any
10531 at all. There's one exception --- when we're connected with
10532 target extended-remote, and we manually attached to a process
10533 with "attach PID". We don't record anywhere a flag that
10534 allows us to distinguish that case from the case of
10535 connecting with extended-remote and the stub already being
10536 attached to a process, and reporting yes to qAttached, hence
10537 no smart special casing here. */
10538 if (!remote_multi_process_p (rs))
10540 xsnprintf (buf, sizeof buf, "Remote target");
10544 return normal_pid_to_str (ptid);
10548 if (ptid_equal (magic_null_ptid, ptid))
10549 xsnprintf (buf, sizeof buf, "Thread <main>");
10550 else if (remote_multi_process_p (rs))
10551 if (ptid_get_lwp (ptid) == 0)
10552 return normal_pid_to_str (ptid);
10554 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
10555 ptid_get_pid (ptid), ptid_get_lwp (ptid));
10557 xsnprintf (buf, sizeof buf, "Thread %ld",
10558 ptid_get_lwp (ptid));
10563 /* Get the address of the thread local variable in OBJFILE which is
10564 stored at OFFSET within the thread local storage for thread PTID. */
10567 remote_get_thread_local_address (struct target_ops *ops,
10568 ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
10570 if (packet_support (PACKET_qGetTLSAddr) != PACKET_DISABLE)
10572 struct remote_state *rs = get_remote_state ();
10574 char *endp = rs->buf + get_remote_packet_size ();
10575 enum packet_result result;
10577 strcpy (p, "qGetTLSAddr:");
10579 p = write_ptid (p, endp, ptid);
10581 p += hexnumstr (p, offset);
10583 p += hexnumstr (p, lm);
10587 getpkt (&rs->buf, &rs->buf_size, 0);
10588 result = packet_ok (rs->buf,
10589 &remote_protocol_packets[PACKET_qGetTLSAddr]);
10590 if (result == PACKET_OK)
10594 unpack_varlen_hex (rs->buf, &result);
10597 else if (result == PACKET_UNKNOWN)
10598 throw_error (TLS_GENERIC_ERROR,
10599 _("Remote target doesn't support qGetTLSAddr packet"));
10601 throw_error (TLS_GENERIC_ERROR,
10602 _("Remote target failed to process qGetTLSAddr request"));
10605 throw_error (TLS_GENERIC_ERROR,
10606 _("TLS not supported or disabled on this target"));
10611 /* Provide thread local base, i.e. Thread Information Block address.
10612 Returns 1 if ptid is found and thread_local_base is non zero. */
10615 remote_get_tib_address (struct target_ops *self, ptid_t ptid, CORE_ADDR *addr)
10617 if (packet_support (PACKET_qGetTIBAddr) != PACKET_DISABLE)
10619 struct remote_state *rs = get_remote_state ();
10621 char *endp = rs->buf + get_remote_packet_size ();
10622 enum packet_result result;
10624 strcpy (p, "qGetTIBAddr:");
10626 p = write_ptid (p, endp, ptid);
10630 getpkt (&rs->buf, &rs->buf_size, 0);
10631 result = packet_ok (rs->buf,
10632 &remote_protocol_packets[PACKET_qGetTIBAddr]);
10633 if (result == PACKET_OK)
10637 unpack_varlen_hex (rs->buf, &result);
10639 *addr = (CORE_ADDR) result;
10642 else if (result == PACKET_UNKNOWN)
10643 error (_("Remote target doesn't support qGetTIBAddr packet"));
10645 error (_("Remote target failed to process qGetTIBAddr request"));
10648 error (_("qGetTIBAddr not supported or disabled on this target"));
10653 /* Support for inferring a target description based on the current
10654 architecture and the size of a 'g' packet. While the 'g' packet
10655 can have any size (since optional registers can be left off the
10656 end), some sizes are easily recognizable given knowledge of the
10657 approximate architecture. */
10659 struct remote_g_packet_guess
10662 const struct target_desc *tdesc;
10664 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
10665 DEF_VEC_O(remote_g_packet_guess_s);
10667 struct remote_g_packet_data
10669 VEC(remote_g_packet_guess_s) *guesses;
10672 static struct gdbarch_data *remote_g_packet_data_handle;
10675 remote_g_packet_data_init (struct obstack *obstack)
10677 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
10681 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
10682 const struct target_desc *tdesc)
10684 struct remote_g_packet_data *data
10685 = ((struct remote_g_packet_data *)
10686 gdbarch_data (gdbarch, remote_g_packet_data_handle));
10687 struct remote_g_packet_guess new_guess, *guess;
10690 gdb_assert (tdesc != NULL);
10693 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
10695 if (guess->bytes == bytes)
10696 internal_error (__FILE__, __LINE__,
10697 _("Duplicate g packet description added for size %d"),
10700 new_guess.bytes = bytes;
10701 new_guess.tdesc = tdesc;
10702 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
10705 /* Return 1 if remote_read_description would do anything on this target
10706 and architecture, 0 otherwise. */
10709 remote_read_description_p (struct target_ops *target)
10711 struct remote_g_packet_data *data
10712 = ((struct remote_g_packet_data *)
10713 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
10715 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
10721 static const struct target_desc *
10722 remote_read_description (struct target_ops *target)
10724 struct remote_g_packet_data *data
10725 = ((struct remote_g_packet_data *)
10726 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
10728 /* Do not try this during initial connection, when we do not know
10729 whether there is a running but stopped thread. */
10730 if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
10731 return target->beneath->to_read_description (target->beneath);
10733 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
10735 struct remote_g_packet_guess *guess;
10737 int bytes = send_g_packet ();
10740 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
10742 if (guess->bytes == bytes)
10743 return guess->tdesc;
10745 /* We discard the g packet. A minor optimization would be to
10746 hold on to it, and fill the register cache once we have selected
10747 an architecture, but it's too tricky to do safely. */
10750 return target->beneath->to_read_description (target->beneath);
10753 /* Remote file transfer support. This is host-initiated I/O, not
10754 target-initiated; for target-initiated, see remote-fileio.c. */
10756 /* If *LEFT is at least the length of STRING, copy STRING to
10757 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10758 decrease *LEFT. Otherwise raise an error. */
10761 remote_buffer_add_string (char **buffer, int *left, char *string)
10763 int len = strlen (string);
10766 error (_("Packet too long for target."));
10768 memcpy (*buffer, string, len);
10772 /* NUL-terminate the buffer as a convenience, if there is
10778 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
10779 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10780 decrease *LEFT. Otherwise raise an error. */
10783 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
10786 if (2 * len > *left)
10787 error (_("Packet too long for target."));
10789 bin2hex (bytes, *buffer, len);
10790 *buffer += 2 * len;
10793 /* NUL-terminate the buffer as a convenience, if there is
10799 /* If *LEFT is large enough, convert VALUE to hex and add it to
10800 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10801 decrease *LEFT. Otherwise raise an error. */
10804 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
10806 int len = hexnumlen (value);
10809 error (_("Packet too long for target."));
10811 hexnumstr (*buffer, value);
10815 /* NUL-terminate the buffer as a convenience, if there is
10821 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
10822 value, *REMOTE_ERRNO to the remote error number or zero if none
10823 was included, and *ATTACHMENT to point to the start of the annex
10824 if any. The length of the packet isn't needed here; there may
10825 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
10827 Return 0 if the packet could be parsed, -1 if it could not. If
10828 -1 is returned, the other variables may not be initialized. */
10831 remote_hostio_parse_result (char *buffer, int *retcode,
10832 int *remote_errno, char **attachment)
10837 *attachment = NULL;
10839 if (buffer[0] != 'F')
10843 *retcode = strtol (&buffer[1], &p, 16);
10844 if (errno != 0 || p == &buffer[1])
10847 /* Check for ",errno". */
10851 *remote_errno = strtol (p + 1, &p2, 16);
10852 if (errno != 0 || p + 1 == p2)
10857 /* Check for ";attachment". If there is no attachment, the
10858 packet should end here. */
10861 *attachment = p + 1;
10864 else if (*p == '\0')
10870 /* Send a prepared I/O packet to the target and read its response.
10871 The prepared packet is in the global RS->BUF before this function
10872 is called, and the answer is there when we return.
10874 COMMAND_BYTES is the length of the request to send, which may include
10875 binary data. WHICH_PACKET is the packet configuration to check
10876 before attempting a packet. If an error occurs, *REMOTE_ERRNO
10877 is set to the error number and -1 is returned. Otherwise the value
10878 returned by the function is returned.
10880 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
10881 attachment is expected; an error will be reported if there's a
10882 mismatch. If one is found, *ATTACHMENT will be set to point into
10883 the packet buffer and *ATTACHMENT_LEN will be set to the
10884 attachment's length. */
10887 remote_hostio_send_command (int command_bytes, int which_packet,
10888 int *remote_errno, char **attachment,
10889 int *attachment_len)
10891 struct remote_state *rs = get_remote_state ();
10892 int ret, bytes_read;
10893 char *attachment_tmp;
10895 if (!rs->remote_desc
10896 || packet_support (which_packet) == PACKET_DISABLE)
10898 *remote_errno = FILEIO_ENOSYS;
10902 putpkt_binary (rs->buf, command_bytes);
10903 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
10905 /* If it timed out, something is wrong. Don't try to parse the
10907 if (bytes_read < 0)
10909 *remote_errno = FILEIO_EINVAL;
10913 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
10916 *remote_errno = FILEIO_EINVAL;
10918 case PACKET_UNKNOWN:
10919 *remote_errno = FILEIO_ENOSYS;
10925 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
10928 *remote_errno = FILEIO_EINVAL;
10932 /* Make sure we saw an attachment if and only if we expected one. */
10933 if ((attachment_tmp == NULL && attachment != NULL)
10934 || (attachment_tmp != NULL && attachment == NULL))
10936 *remote_errno = FILEIO_EINVAL;
10940 /* If an attachment was found, it must point into the packet buffer;
10941 work out how many bytes there were. */
10942 if (attachment_tmp != NULL)
10944 *attachment = attachment_tmp;
10945 *attachment_len = bytes_read - (*attachment - rs->buf);
10951 /* Invalidate the readahead cache. */
10954 readahead_cache_invalidate (void)
10956 struct remote_state *rs = get_remote_state ();
10958 rs->readahead_cache.fd = -1;
10961 /* Invalidate the readahead cache if it is holding data for FD. */
10964 readahead_cache_invalidate_fd (int fd)
10966 struct remote_state *rs = get_remote_state ();
10968 if (rs->readahead_cache.fd == fd)
10969 rs->readahead_cache.fd = -1;
10972 /* Set the filesystem remote_hostio functions that take FILENAME
10973 arguments will use. Return 0 on success, or -1 if an error
10974 occurs (and set *REMOTE_ERRNO). */
10977 remote_hostio_set_filesystem (struct inferior *inf, int *remote_errno)
10979 struct remote_state *rs = get_remote_state ();
10980 int required_pid = (inf == NULL || inf->fake_pid_p) ? 0 : inf->pid;
10982 int left = get_remote_packet_size () - 1;
10986 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
10989 if (rs->fs_pid != -1 && required_pid == rs->fs_pid)
10992 remote_buffer_add_string (&p, &left, "vFile:setfs:");
10994 xsnprintf (arg, sizeof (arg), "%x", required_pid);
10995 remote_buffer_add_string (&p, &left, arg);
10997 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_setfs,
10998 remote_errno, NULL, NULL);
11000 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
11004 rs->fs_pid = required_pid;
11009 /* Implementation of to_fileio_open. */
11012 remote_hostio_open (struct target_ops *self,
11013 struct inferior *inf, const char *filename,
11014 int flags, int mode, int warn_if_slow,
11017 struct remote_state *rs = get_remote_state ();
11019 int left = get_remote_packet_size () - 1;
11023 static int warning_issued = 0;
11025 printf_unfiltered (_("Reading %s from remote target...\n"),
11028 if (!warning_issued)
11030 warning (_("File transfers from remote targets can be slow."
11031 " Use \"set sysroot\" to access files locally"
11033 warning_issued = 1;
11037 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11040 remote_buffer_add_string (&p, &left, "vFile:open:");
11042 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11043 strlen (filename));
11044 remote_buffer_add_string (&p, &left, ",");
11046 remote_buffer_add_int (&p, &left, flags);
11047 remote_buffer_add_string (&p, &left, ",");
11049 remote_buffer_add_int (&p, &left, mode);
11051 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
11052 remote_errno, NULL, NULL);
11055 /* Implementation of to_fileio_pwrite. */
11058 remote_hostio_pwrite (struct target_ops *self,
11059 int fd, const gdb_byte *write_buf, int len,
11060 ULONGEST offset, int *remote_errno)
11062 struct remote_state *rs = get_remote_state ();
11064 int left = get_remote_packet_size ();
11067 readahead_cache_invalidate_fd (fd);
11069 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
11071 remote_buffer_add_int (&p, &left, fd);
11072 remote_buffer_add_string (&p, &left, ",");
11074 remote_buffer_add_int (&p, &left, offset);
11075 remote_buffer_add_string (&p, &left, ",");
11077 p += remote_escape_output (write_buf, len, 1, (gdb_byte *) p, &out_len,
11078 get_remote_packet_size () - (p - rs->buf));
11080 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
11081 remote_errno, NULL, NULL);
11084 /* Helper for the implementation of to_fileio_pread. Read the file
11085 from the remote side with vFile:pread. */
11088 remote_hostio_pread_vFile (struct target_ops *self,
11089 int fd, gdb_byte *read_buf, int len,
11090 ULONGEST offset, int *remote_errno)
11092 struct remote_state *rs = get_remote_state ();
11095 int left = get_remote_packet_size ();
11096 int ret, attachment_len;
11099 remote_buffer_add_string (&p, &left, "vFile:pread:");
11101 remote_buffer_add_int (&p, &left, fd);
11102 remote_buffer_add_string (&p, &left, ",");
11104 remote_buffer_add_int (&p, &left, len);
11105 remote_buffer_add_string (&p, &left, ",");
11107 remote_buffer_add_int (&p, &left, offset);
11109 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
11110 remote_errno, &attachment,
11116 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11118 if (read_len != ret)
11119 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
11124 /* Serve pread from the readahead cache. Returns number of bytes
11125 read, or 0 if the request can't be served from the cache. */
11128 remote_hostio_pread_from_cache (struct remote_state *rs,
11129 int fd, gdb_byte *read_buf, size_t len,
11132 struct readahead_cache *cache = &rs->readahead_cache;
11134 if (cache->fd == fd
11135 && cache->offset <= offset
11136 && offset < cache->offset + cache->bufsize)
11138 ULONGEST max = cache->offset + cache->bufsize;
11140 if (offset + len > max)
11141 len = max - offset;
11143 memcpy (read_buf, cache->buf + offset - cache->offset, len);
11150 /* Implementation of to_fileio_pread. */
11153 remote_hostio_pread (struct target_ops *self,
11154 int fd, gdb_byte *read_buf, int len,
11155 ULONGEST offset, int *remote_errno)
11158 struct remote_state *rs = get_remote_state ();
11159 struct readahead_cache *cache = &rs->readahead_cache;
11161 ret = remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset);
11164 cache->hit_count++;
11167 fprintf_unfiltered (gdb_stdlog, "readahead cache hit %s\n",
11168 pulongest (cache->hit_count));
11172 cache->miss_count++;
11174 fprintf_unfiltered (gdb_stdlog, "readahead cache miss %s\n",
11175 pulongest (cache->miss_count));
11178 cache->offset = offset;
11179 cache->bufsize = get_remote_packet_size ();
11180 cache->buf = (gdb_byte *) xrealloc (cache->buf, cache->bufsize);
11182 ret = remote_hostio_pread_vFile (self, cache->fd, cache->buf, cache->bufsize,
11183 cache->offset, remote_errno);
11186 readahead_cache_invalidate_fd (fd);
11190 cache->bufsize = ret;
11191 return remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset);
11194 /* Implementation of to_fileio_close. */
11197 remote_hostio_close (struct target_ops *self, int fd, int *remote_errno)
11199 struct remote_state *rs = get_remote_state ();
11201 int left = get_remote_packet_size () - 1;
11203 readahead_cache_invalidate_fd (fd);
11205 remote_buffer_add_string (&p, &left, "vFile:close:");
11207 remote_buffer_add_int (&p, &left, fd);
11209 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
11210 remote_errno, NULL, NULL);
11213 /* Implementation of to_fileio_unlink. */
11216 remote_hostio_unlink (struct target_ops *self,
11217 struct inferior *inf, const char *filename,
11220 struct remote_state *rs = get_remote_state ();
11222 int left = get_remote_packet_size () - 1;
11224 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11227 remote_buffer_add_string (&p, &left, "vFile:unlink:");
11229 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11230 strlen (filename));
11232 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
11233 remote_errno, NULL, NULL);
11236 /* Implementation of to_fileio_readlink. */
11239 remote_hostio_readlink (struct target_ops *self,
11240 struct inferior *inf, const char *filename,
11243 struct remote_state *rs = get_remote_state ();
11246 int left = get_remote_packet_size ();
11247 int len, attachment_len;
11251 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11254 remote_buffer_add_string (&p, &left, "vFile:readlink:");
11256 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11257 strlen (filename));
11259 len = remote_hostio_send_command (p - rs->buf, PACKET_vFile_readlink,
11260 remote_errno, &attachment,
11266 ret = (char *) xmalloc (len + 1);
11268 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11269 (gdb_byte *) ret, len);
11270 if (read_len != len)
11271 error (_("Readlink returned %d, but %d bytes."), len, read_len);
11277 /* Implementation of to_fileio_fstat. */
11280 remote_hostio_fstat (struct target_ops *self,
11281 int fd, struct stat *st,
11284 struct remote_state *rs = get_remote_state ();
11286 int left = get_remote_packet_size ();
11287 int attachment_len, ret;
11289 struct fio_stat fst;
11292 remote_buffer_add_string (&p, &left, "vFile:fstat:");
11294 remote_buffer_add_int (&p, &left, fd);
11296 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_fstat,
11297 remote_errno, &attachment,
11301 if (*remote_errno != FILEIO_ENOSYS)
11304 /* Strictly we should return -1, ENOSYS here, but when
11305 "set sysroot remote:" was implemented in August 2008
11306 BFD's need for a stat function was sidestepped with
11307 this hack. This was not remedied until March 2015
11308 so we retain the previous behavior to avoid breaking
11311 Note that the memset is a March 2015 addition; older
11312 GDBs set st_size *and nothing else* so the structure
11313 would have garbage in all other fields. This might
11314 break something but retaining the previous behavior
11315 here would be just too wrong. */
11317 memset (st, 0, sizeof (struct stat));
11318 st->st_size = INT_MAX;
11322 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
11323 (gdb_byte *) &fst, sizeof (fst));
11325 if (read_len != ret)
11326 error (_("vFile:fstat returned %d, but %d bytes."), ret, read_len);
11328 if (read_len != sizeof (fst))
11329 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11330 read_len, (int) sizeof (fst));
11332 remote_fileio_to_host_stat (&fst, st);
11337 /* Implementation of to_filesystem_is_local. */
11340 remote_filesystem_is_local (struct target_ops *self)
11342 /* Valgrind GDB presents itself as a remote target but works
11343 on the local filesystem: it does not implement remote get
11344 and users are not expected to set a sysroot. To handle
11345 this case we treat the remote filesystem as local if the
11346 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11347 does not support vFile:open. */
11348 if (strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) == 0)
11350 enum packet_support ps = packet_support (PACKET_vFile_open);
11352 if (ps == PACKET_SUPPORT_UNKNOWN)
11354 int fd, remote_errno;
11356 /* Try opening a file to probe support. The supplied
11357 filename is irrelevant, we only care about whether
11358 the stub recognizes the packet or not. */
11359 fd = remote_hostio_open (self, NULL, "just probing",
11360 FILEIO_O_RDONLY, 0700, 0,
11364 remote_hostio_close (self, fd, &remote_errno);
11366 ps = packet_support (PACKET_vFile_open);
11369 if (ps == PACKET_DISABLE)
11371 static int warning_issued = 0;
11373 if (!warning_issued)
11375 warning (_("remote target does not support file"
11376 " transfer, attempting to access files"
11377 " from local filesystem."));
11378 warning_issued = 1;
11389 remote_fileio_errno_to_host (int errnum)
11395 case FILEIO_ENOENT:
11403 case FILEIO_EACCES:
11405 case FILEIO_EFAULT:
11409 case FILEIO_EEXIST:
11411 case FILEIO_ENODEV:
11413 case FILEIO_ENOTDIR:
11415 case FILEIO_EISDIR:
11417 case FILEIO_EINVAL:
11419 case FILEIO_ENFILE:
11421 case FILEIO_EMFILE:
11425 case FILEIO_ENOSPC:
11427 case FILEIO_ESPIPE:
11431 case FILEIO_ENOSYS:
11433 case FILEIO_ENAMETOOLONG:
11434 return ENAMETOOLONG;
11440 remote_hostio_error (int errnum)
11442 int host_error = remote_fileio_errno_to_host (errnum);
11444 if (host_error == -1)
11445 error (_("Unknown remote I/O error %d"), errnum);
11447 error (_("Remote I/O error: %s"), safe_strerror (host_error));
11451 remote_hostio_close_cleanup (void *opaque)
11453 int fd = *(int *) opaque;
11456 remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno);
11460 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
11462 struct cleanup *back_to, *close_cleanup;
11463 int retcode, fd, remote_errno, bytes, io_size;
11466 int bytes_in_buffer;
11469 struct remote_state *rs = get_remote_state ();
11471 if (!rs->remote_desc)
11472 error (_("command can only be used with remote target"));
11474 file = gdb_fopen_cloexec (local_file, "rb");
11476 perror_with_name (local_file);
11477 back_to = make_cleanup_fclose (file);
11479 fd = remote_hostio_open (find_target_at (process_stratum), NULL,
11480 remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
11482 0700, 0, &remote_errno);
11484 remote_hostio_error (remote_errno);
11486 /* Send up to this many bytes at once. They won't all fit in the
11487 remote packet limit, so we'll transfer slightly fewer. */
11488 io_size = get_remote_packet_size ();
11489 buffer = (gdb_byte *) xmalloc (io_size);
11490 make_cleanup (xfree, buffer);
11492 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
11494 bytes_in_buffer = 0;
11497 while (bytes_in_buffer || !saw_eof)
11501 bytes = fread (buffer + bytes_in_buffer, 1,
11502 io_size - bytes_in_buffer,
11507 error (_("Error reading %s."), local_file);
11510 /* EOF. Unless there is something still in the
11511 buffer from the last iteration, we are done. */
11513 if (bytes_in_buffer == 0)
11521 bytes += bytes_in_buffer;
11522 bytes_in_buffer = 0;
11524 retcode = remote_hostio_pwrite (find_target_at (process_stratum),
11526 offset, &remote_errno);
11529 remote_hostio_error (remote_errno);
11530 else if (retcode == 0)
11531 error (_("Remote write of %d bytes returned 0!"), bytes);
11532 else if (retcode < bytes)
11534 /* Short write. Save the rest of the read data for the next
11536 bytes_in_buffer = bytes - retcode;
11537 memmove (buffer, buffer + retcode, bytes_in_buffer);
11543 discard_cleanups (close_cleanup);
11544 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
11545 remote_hostio_error (remote_errno);
11548 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
11549 do_cleanups (back_to);
11553 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
11555 struct cleanup *back_to, *close_cleanup;
11556 int fd, remote_errno, bytes, io_size;
11560 struct remote_state *rs = get_remote_state ();
11562 if (!rs->remote_desc)
11563 error (_("command can only be used with remote target"));
11565 fd = remote_hostio_open (find_target_at (process_stratum), NULL,
11566 remote_file, FILEIO_O_RDONLY, 0, 0,
11569 remote_hostio_error (remote_errno);
11571 file = gdb_fopen_cloexec (local_file, "wb");
11573 perror_with_name (local_file);
11574 back_to = make_cleanup_fclose (file);
11576 /* Send up to this many bytes at once. They won't all fit in the
11577 remote packet limit, so we'll transfer slightly fewer. */
11578 io_size = get_remote_packet_size ();
11579 buffer = (gdb_byte *) xmalloc (io_size);
11580 make_cleanup (xfree, buffer);
11582 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
11587 bytes = remote_hostio_pread (find_target_at (process_stratum),
11588 fd, buffer, io_size, offset, &remote_errno);
11590 /* Success, but no bytes, means end-of-file. */
11593 remote_hostio_error (remote_errno);
11597 bytes = fwrite (buffer, 1, bytes, file);
11599 perror_with_name (local_file);
11602 discard_cleanups (close_cleanup);
11603 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
11604 remote_hostio_error (remote_errno);
11607 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
11608 do_cleanups (back_to);
11612 remote_file_delete (const char *remote_file, int from_tty)
11614 int retcode, remote_errno;
11615 struct remote_state *rs = get_remote_state ();
11617 if (!rs->remote_desc)
11618 error (_("command can only be used with remote target"));
11620 retcode = remote_hostio_unlink (find_target_at (process_stratum),
11621 NULL, remote_file, &remote_errno);
11623 remote_hostio_error (remote_errno);
11626 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
11630 remote_put_command (char *args, int from_tty)
11632 struct cleanup *back_to;
11636 error_no_arg (_("file to put"));
11638 argv = gdb_buildargv (args);
11639 back_to = make_cleanup_freeargv (argv);
11640 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
11641 error (_("Invalid parameters to remote put"));
11643 remote_file_put (argv[0], argv[1], from_tty);
11645 do_cleanups (back_to);
11649 remote_get_command (char *args, int from_tty)
11651 struct cleanup *back_to;
11655 error_no_arg (_("file to get"));
11657 argv = gdb_buildargv (args);
11658 back_to = make_cleanup_freeargv (argv);
11659 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
11660 error (_("Invalid parameters to remote get"));
11662 remote_file_get (argv[0], argv[1], from_tty);
11664 do_cleanups (back_to);
11668 remote_delete_command (char *args, int from_tty)
11670 struct cleanup *back_to;
11674 error_no_arg (_("file to delete"));
11676 argv = gdb_buildargv (args);
11677 back_to = make_cleanup_freeargv (argv);
11678 if (argv[0] == NULL || argv[1] != NULL)
11679 error (_("Invalid parameters to remote delete"));
11681 remote_file_delete (argv[0], from_tty);
11683 do_cleanups (back_to);
11687 remote_command (char *args, int from_tty)
11689 help_list (remote_cmdlist, "remote ", all_commands, gdb_stdout);
11693 remote_can_execute_reverse (struct target_ops *self)
11695 if (packet_support (PACKET_bs) == PACKET_ENABLE
11696 || packet_support (PACKET_bc) == PACKET_ENABLE)
11703 remote_supports_non_stop (struct target_ops *self)
11709 remote_supports_disable_randomization (struct target_ops *self)
11711 /* Only supported in extended mode. */
11716 remote_supports_multi_process (struct target_ops *self)
11718 struct remote_state *rs = get_remote_state ();
11720 return remote_multi_process_p (rs);
11724 remote_supports_cond_tracepoints (void)
11726 return packet_support (PACKET_ConditionalTracepoints) == PACKET_ENABLE;
11730 remote_supports_cond_breakpoints (struct target_ops *self)
11732 return packet_support (PACKET_ConditionalBreakpoints) == PACKET_ENABLE;
11736 remote_supports_fast_tracepoints (void)
11738 return packet_support (PACKET_FastTracepoints) == PACKET_ENABLE;
11742 remote_supports_static_tracepoints (void)
11744 return packet_support (PACKET_StaticTracepoints) == PACKET_ENABLE;
11748 remote_supports_install_in_trace (void)
11750 return packet_support (PACKET_InstallInTrace) == PACKET_ENABLE;
11754 remote_supports_enable_disable_tracepoint (struct target_ops *self)
11756 return (packet_support (PACKET_EnableDisableTracepoints_feature)
11761 remote_supports_string_tracing (struct target_ops *self)
11763 return packet_support (PACKET_tracenz_feature) == PACKET_ENABLE;
11767 remote_can_run_breakpoint_commands (struct target_ops *self)
11769 return packet_support (PACKET_BreakpointCommands) == PACKET_ENABLE;
11773 remote_trace_init (struct target_ops *self)
11776 remote_get_noisy_reply (&target_buf, &target_buf_size);
11777 if (strcmp (target_buf, "OK") != 0)
11778 error (_("Target does not support this command."));
11781 static void free_actions_list (char **actions_list);
11782 static void free_actions_list_cleanup_wrapper (void *);
11784 free_actions_list_cleanup_wrapper (void *al)
11786 free_actions_list ((char **) al);
11790 free_actions_list (char **actions_list)
11794 if (actions_list == 0)
11797 for (ndx = 0; actions_list[ndx]; ndx++)
11798 xfree (actions_list[ndx]);
11800 xfree (actions_list);
11803 /* Recursive routine to walk through command list including loops, and
11804 download packets for each command. */
11807 remote_download_command_source (int num, ULONGEST addr,
11808 struct command_line *cmds)
11810 struct remote_state *rs = get_remote_state ();
11811 struct command_line *cmd;
11813 for (cmd = cmds; cmd; cmd = cmd->next)
11815 QUIT; /* Allow user to bail out with ^C. */
11816 strcpy (rs->buf, "QTDPsrc:");
11817 encode_source_string (num, addr, "cmd", cmd->line,
11818 rs->buf + strlen (rs->buf),
11819 rs->buf_size - strlen (rs->buf));
11821 remote_get_noisy_reply (&target_buf, &target_buf_size);
11822 if (strcmp (target_buf, "OK"))
11823 warning (_("Target does not support source download."));
11825 if (cmd->control_type == while_control
11826 || cmd->control_type == while_stepping_control)
11828 remote_download_command_source (num, addr, *cmd->body_list);
11830 QUIT; /* Allow user to bail out with ^C. */
11831 strcpy (rs->buf, "QTDPsrc:");
11832 encode_source_string (num, addr, "cmd", "end",
11833 rs->buf + strlen (rs->buf),
11834 rs->buf_size - strlen (rs->buf));
11836 remote_get_noisy_reply (&target_buf, &target_buf_size);
11837 if (strcmp (target_buf, "OK"))
11838 warning (_("Target does not support source download."));
11844 remote_download_tracepoint (struct target_ops *self, struct bp_location *loc)
11846 #define BUF_SIZE 2048
11850 char buf[BUF_SIZE];
11851 char **tdp_actions;
11852 char **stepping_actions;
11854 struct cleanup *old_chain = NULL;
11855 struct agent_expr *aexpr;
11856 struct cleanup *aexpr_chain = NULL;
11858 struct breakpoint *b = loc->owner;
11859 struct tracepoint *t = (struct tracepoint *) b;
11861 encode_actions_rsp (loc, &tdp_actions, &stepping_actions);
11862 old_chain = make_cleanup (free_actions_list_cleanup_wrapper,
11864 (void) make_cleanup (free_actions_list_cleanup_wrapper,
11867 tpaddr = loc->address;
11868 sprintf_vma (addrbuf, tpaddr);
11869 xsnprintf (buf, BUF_SIZE, "QTDP:%x:%s:%c:%lx:%x", b->number,
11870 addrbuf, /* address */
11871 (b->enable_state == bp_enabled ? 'E' : 'D'),
11872 t->step_count, t->pass_count);
11873 /* Fast tracepoints are mostly handled by the target, but we can
11874 tell the target how big of an instruction block should be moved
11876 if (b->type == bp_fast_tracepoint)
11878 /* Only test for support at download time; we may not know
11879 target capabilities at definition time. */
11880 if (remote_supports_fast_tracepoints ())
11882 if (gdbarch_fast_tracepoint_valid_at (loc->gdbarch, tpaddr,
11884 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":F%x",
11885 gdb_insn_length (loc->gdbarch, tpaddr));
11887 /* If it passed validation at definition but fails now,
11888 something is very wrong. */
11889 internal_error (__FILE__, __LINE__,
11890 _("Fast tracepoint not "
11891 "valid during download"));
11894 /* Fast tracepoints are functionally identical to regular
11895 tracepoints, so don't take lack of support as a reason to
11896 give up on the trace run. */
11897 warning (_("Target does not support fast tracepoints, "
11898 "downloading %d as regular tracepoint"), b->number);
11900 else if (b->type == bp_static_tracepoint)
11902 /* Only test for support at download time; we may not know
11903 target capabilities at definition time. */
11904 if (remote_supports_static_tracepoints ())
11906 struct static_tracepoint_marker marker;
11908 if (target_static_tracepoint_marker_at (tpaddr, &marker))
11909 strcat (buf, ":S");
11911 error (_("Static tracepoint not valid during download"));
11914 /* Fast tracepoints are functionally identical to regular
11915 tracepoints, so don't take lack of support as a reason
11916 to give up on the trace run. */
11917 error (_("Target does not support static tracepoints"));
11919 /* If the tracepoint has a conditional, make it into an agent
11920 expression and append to the definition. */
11923 /* Only test support at download time, we may not know target
11924 capabilities at definition time. */
11925 if (remote_supports_cond_tracepoints ())
11927 aexpr = gen_eval_for_expr (tpaddr, loc->cond);
11928 aexpr_chain = make_cleanup_free_agent_expr (aexpr);
11929 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":X%x,",
11931 pkt = buf + strlen (buf);
11932 for (ndx = 0; ndx < aexpr->len; ++ndx)
11933 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
11935 do_cleanups (aexpr_chain);
11938 warning (_("Target does not support conditional tracepoints, "
11939 "ignoring tp %d cond"), b->number);
11942 if (b->commands || *default_collect)
11945 remote_get_noisy_reply (&target_buf, &target_buf_size);
11946 if (strcmp (target_buf, "OK"))
11947 error (_("Target does not support tracepoints."));
11949 /* do_single_steps (t); */
11952 for (ndx = 0; tdp_actions[ndx]; ndx++)
11954 QUIT; /* Allow user to bail out with ^C. */
11955 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%c",
11956 b->number, addrbuf, /* address */
11958 ((tdp_actions[ndx + 1] || stepping_actions)
11961 remote_get_noisy_reply (&target_buf,
11963 if (strcmp (target_buf, "OK"))
11964 error (_("Error on target while setting tracepoints."));
11967 if (stepping_actions)
11969 for (ndx = 0; stepping_actions[ndx]; ndx++)
11971 QUIT; /* Allow user to bail out with ^C. */
11972 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%s%s",
11973 b->number, addrbuf, /* address */
11974 ((ndx == 0) ? "S" : ""),
11975 stepping_actions[ndx],
11976 (stepping_actions[ndx + 1] ? "-" : ""));
11978 remote_get_noisy_reply (&target_buf,
11980 if (strcmp (target_buf, "OK"))
11981 error (_("Error on target while setting tracepoints."));
11985 if (packet_support (PACKET_TracepointSource) == PACKET_ENABLE)
11987 if (b->location != NULL)
11989 strcpy (buf, "QTDPsrc:");
11990 encode_source_string (b->number, loc->address, "at",
11991 event_location_to_string (b->location),
11992 buf + strlen (buf), 2048 - strlen (buf));
11994 remote_get_noisy_reply (&target_buf, &target_buf_size);
11995 if (strcmp (target_buf, "OK"))
11996 warning (_("Target does not support source download."));
11998 if (b->cond_string)
12000 strcpy (buf, "QTDPsrc:");
12001 encode_source_string (b->number, loc->address,
12002 "cond", b->cond_string, buf + strlen (buf),
12003 2048 - strlen (buf));
12005 remote_get_noisy_reply (&target_buf, &target_buf_size);
12006 if (strcmp (target_buf, "OK"))
12007 warning (_("Target does not support source download."));
12009 remote_download_command_source (b->number, loc->address,
12010 breakpoint_commands (b));
12013 do_cleanups (old_chain);
12017 remote_can_download_tracepoint (struct target_ops *self)
12019 struct remote_state *rs = get_remote_state ();
12020 struct trace_status *ts;
12023 /* Don't try to install tracepoints until we've relocated our
12024 symbols, and fetched and merged the target's tracepoint list with
12026 if (rs->starting_up)
12029 ts = current_trace_status ();
12030 status = remote_get_trace_status (self, ts);
12032 if (status == -1 || !ts->running_known || !ts->running)
12035 /* If we are in a tracing experiment, but remote stub doesn't support
12036 installing tracepoint in trace, we have to return. */
12037 if (!remote_supports_install_in_trace ())
12045 remote_download_trace_state_variable (struct target_ops *self,
12046 struct trace_state_variable *tsv)
12048 struct remote_state *rs = get_remote_state ();
12051 xsnprintf (rs->buf, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12052 tsv->number, phex ((ULONGEST) tsv->initial_value, 8),
12054 p = rs->buf + strlen (rs->buf);
12055 if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ())
12056 error (_("Trace state variable name too long for tsv definition packet"));
12057 p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, strlen (tsv->name));
12060 remote_get_noisy_reply (&target_buf, &target_buf_size);
12061 if (*target_buf == '\0')
12062 error (_("Target does not support this command."));
12063 if (strcmp (target_buf, "OK") != 0)
12064 error (_("Error on target while downloading trace state variable."));
12068 remote_enable_tracepoint (struct target_ops *self,
12069 struct bp_location *location)
12071 struct remote_state *rs = get_remote_state ();
12074 sprintf_vma (addr_buf, location->address);
12075 xsnprintf (rs->buf, get_remote_packet_size (), "QTEnable:%x:%s",
12076 location->owner->number, addr_buf);
12078 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
12079 if (*rs->buf == '\0')
12080 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12081 if (strcmp (rs->buf, "OK") != 0)
12082 error (_("Error on target while enabling tracepoint."));
12086 remote_disable_tracepoint (struct target_ops *self,
12087 struct bp_location *location)
12089 struct remote_state *rs = get_remote_state ();
12092 sprintf_vma (addr_buf, location->address);
12093 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisable:%x:%s",
12094 location->owner->number, addr_buf);
12096 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
12097 if (*rs->buf == '\0')
12098 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12099 if (strcmp (rs->buf, "OK") != 0)
12100 error (_("Error on target while disabling tracepoint."));
12104 remote_trace_set_readonly_regions (struct target_ops *self)
12108 bfd_size_type size;
12114 return; /* No information to give. */
12116 strcpy (target_buf, "QTro");
12117 offset = strlen (target_buf);
12118 for (s = exec_bfd->sections; s; s = s->next)
12120 char tmp1[40], tmp2[40];
12123 if ((s->flags & SEC_LOAD) == 0 ||
12124 /* (s->flags & SEC_CODE) == 0 || */
12125 (s->flags & SEC_READONLY) == 0)
12129 vma = bfd_get_section_vma (abfd, s);
12130 size = bfd_get_section_size (s);
12131 sprintf_vma (tmp1, vma);
12132 sprintf_vma (tmp2, vma + size);
12133 sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2);
12134 if (offset + sec_length + 1 > target_buf_size)
12136 if (packet_support (PACKET_qXfer_traceframe_info) != PACKET_ENABLE)
12138 Too many sections for read-only sections definition packet."));
12141 xsnprintf (target_buf + offset, target_buf_size - offset, ":%s,%s",
12143 offset += sec_length;
12147 putpkt (target_buf);
12148 getpkt (&target_buf, &target_buf_size, 0);
12153 remote_trace_start (struct target_ops *self)
12155 putpkt ("QTStart");
12156 remote_get_noisy_reply (&target_buf, &target_buf_size);
12157 if (*target_buf == '\0')
12158 error (_("Target does not support this command."));
12159 if (strcmp (target_buf, "OK") != 0)
12160 error (_("Bogus reply from target: %s"), target_buf);
12164 remote_get_trace_status (struct target_ops *self, struct trace_status *ts)
12166 /* Initialize it just to avoid a GCC false warning. */
12168 /* FIXME we need to get register block size some other way. */
12169 extern int trace_regblock_size;
12170 enum packet_result result;
12172 if (packet_support (PACKET_qTStatus) == PACKET_DISABLE)
12175 trace_regblock_size = get_remote_arch_state ()->sizeof_g_packet;
12177 putpkt ("qTStatus");
12181 p = remote_get_noisy_reply (&target_buf, &target_buf_size);
12183 CATCH (ex, RETURN_MASK_ERROR)
12185 if (ex.error != TARGET_CLOSE_ERROR)
12187 exception_fprintf (gdb_stderr, ex, "qTStatus: ");
12190 throw_exception (ex);
12194 result = packet_ok (p, &remote_protocol_packets[PACKET_qTStatus]);
12196 /* If the remote target doesn't do tracing, flag it. */
12197 if (result == PACKET_UNKNOWN)
12200 /* We're working with a live target. */
12201 ts->filename = NULL;
12204 error (_("Bogus trace status reply from target: %s"), target_buf);
12206 /* Function 'parse_trace_status' sets default value of each field of
12207 'ts' at first, so we don't have to do it here. */
12208 parse_trace_status (p, ts);
12210 return ts->running;
12214 remote_get_tracepoint_status (struct target_ops *self, struct breakpoint *bp,
12215 struct uploaded_tp *utp)
12217 struct remote_state *rs = get_remote_state ();
12219 struct bp_location *loc;
12220 struct tracepoint *tp = (struct tracepoint *) bp;
12221 size_t size = get_remote_packet_size ();
12225 tp->base.hit_count = 0;
12226 tp->traceframe_usage = 0;
12227 for (loc = tp->base.loc; loc; loc = loc->next)
12229 /* If the tracepoint was never downloaded, don't go asking for
12231 if (tp->number_on_target == 0)
12233 xsnprintf (rs->buf, size, "qTP:%x:%s", tp->number_on_target,
12234 phex_nz (loc->address, 0));
12236 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12237 if (reply && *reply)
12240 parse_tracepoint_status (reply + 1, bp, utp);
12246 utp->hit_count = 0;
12247 utp->traceframe_usage = 0;
12248 xsnprintf (rs->buf, size, "qTP:%x:%s", utp->number,
12249 phex_nz (utp->addr, 0));
12251 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12252 if (reply && *reply)
12255 parse_tracepoint_status (reply + 1, bp, utp);
12261 remote_trace_stop (struct target_ops *self)
12264 remote_get_noisy_reply (&target_buf, &target_buf_size);
12265 if (*target_buf == '\0')
12266 error (_("Target does not support this command."));
12267 if (strcmp (target_buf, "OK") != 0)
12268 error (_("Bogus reply from target: %s"), target_buf);
12272 remote_trace_find (struct target_ops *self,
12273 enum trace_find_type type, int num,
12274 CORE_ADDR addr1, CORE_ADDR addr2,
12277 struct remote_state *rs = get_remote_state ();
12278 char *endbuf = rs->buf + get_remote_packet_size ();
12280 int target_frameno = -1, target_tracept = -1;
12282 /* Lookups other than by absolute frame number depend on the current
12283 trace selected, so make sure it is correct on the remote end
12285 if (type != tfind_number)
12286 set_remote_traceframe ();
12289 strcpy (p, "QTFrame:");
12290 p = strchr (p, '\0');
12294 xsnprintf (p, endbuf - p, "%x", num);
12297 xsnprintf (p, endbuf - p, "pc:%s", phex_nz (addr1, 0));
12300 xsnprintf (p, endbuf - p, "tdp:%x", num);
12303 xsnprintf (p, endbuf - p, "range:%s:%s", phex_nz (addr1, 0),
12304 phex_nz (addr2, 0));
12306 case tfind_outside:
12307 xsnprintf (p, endbuf - p, "outside:%s:%s", phex_nz (addr1, 0),
12308 phex_nz (addr2, 0));
12311 error (_("Unknown trace find type %d"), type);
12315 reply = remote_get_noisy_reply (&(rs->buf), &rs->buf_size);
12316 if (*reply == '\0')
12317 error (_("Target does not support this command."));
12319 while (reply && *reply)
12324 target_frameno = (int) strtol (p, &reply, 16);
12326 error (_("Unable to parse trace frame number"));
12327 /* Don't update our remote traceframe number cache on failure
12328 to select a remote traceframe. */
12329 if (target_frameno == -1)
12334 target_tracept = (int) strtol (p, &reply, 16);
12336 error (_("Unable to parse tracepoint number"));
12338 case 'O': /* "OK"? */
12339 if (reply[1] == 'K' && reply[2] == '\0')
12342 error (_("Bogus reply from target: %s"), reply);
12345 error (_("Bogus reply from target: %s"), reply);
12348 *tpp = target_tracept;
12350 rs->remote_traceframe_number = target_frameno;
12351 return target_frameno;
12355 remote_get_trace_state_variable_value (struct target_ops *self,
12356 int tsvnum, LONGEST *val)
12358 struct remote_state *rs = get_remote_state ();
12362 set_remote_traceframe ();
12364 xsnprintf (rs->buf, get_remote_packet_size (), "qTV:%x", tsvnum);
12366 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12367 if (reply && *reply)
12371 unpack_varlen_hex (reply + 1, &uval);
12372 *val = (LONGEST) uval;
12380 remote_save_trace_data (struct target_ops *self, const char *filename)
12382 struct remote_state *rs = get_remote_state ();
12386 strcpy (p, "QTSave:");
12388 if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ())
12389 error (_("Remote file name too long for trace save packet"));
12390 p += 2 * bin2hex ((gdb_byte *) filename, p, strlen (filename));
12393 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12394 if (*reply == '\0')
12395 error (_("Target does not support this command."));
12396 if (strcmp (reply, "OK") != 0)
12397 error (_("Bogus reply from target: %s"), reply);
12401 /* This is basically a memory transfer, but needs to be its own packet
12402 because we don't know how the target actually organizes its trace
12403 memory, plus we want to be able to ask for as much as possible, but
12404 not be unhappy if we don't get as much as we ask for. */
12407 remote_get_raw_trace_data (struct target_ops *self,
12408 gdb_byte *buf, ULONGEST offset, LONGEST len)
12410 struct remote_state *rs = get_remote_state ();
12416 strcpy (p, "qTBuffer:");
12418 p += hexnumstr (p, offset);
12420 p += hexnumstr (p, len);
12424 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12425 if (reply && *reply)
12427 /* 'l' by itself means we're at the end of the buffer and
12428 there is nothing more to get. */
12432 /* Convert the reply into binary. Limit the number of bytes to
12433 convert according to our passed-in buffer size, rather than
12434 what was returned in the packet; if the target is
12435 unexpectedly generous and gives us a bigger reply than we
12436 asked for, we don't want to crash. */
12437 rslt = hex2bin (target_buf, buf, len);
12441 /* Something went wrong, flag as an error. */
12446 remote_set_disconnected_tracing (struct target_ops *self, int val)
12448 struct remote_state *rs = get_remote_state ();
12450 if (packet_support (PACKET_DisconnectedTracing_feature) == PACKET_ENABLE)
12454 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisconnected:%x", val);
12456 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12457 if (*reply == '\0')
12458 error (_("Target does not support this command."));
12459 if (strcmp (reply, "OK") != 0)
12460 error (_("Bogus reply from target: %s"), reply);
12463 warning (_("Target does not support disconnected tracing."));
12467 remote_core_of_thread (struct target_ops *ops, ptid_t ptid)
12469 struct thread_info *info = find_thread_ptid (ptid);
12471 if (info && info->priv)
12472 return info->priv->core;
12477 remote_set_circular_trace_buffer (struct target_ops *self, int val)
12479 struct remote_state *rs = get_remote_state ();
12482 xsnprintf (rs->buf, get_remote_packet_size (), "QTBuffer:circular:%x", val);
12484 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12485 if (*reply == '\0')
12486 error (_("Target does not support this command."));
12487 if (strcmp (reply, "OK") != 0)
12488 error (_("Bogus reply from target: %s"), reply);
12491 static struct traceframe_info *
12492 remote_traceframe_info (struct target_ops *self)
12496 text = target_read_stralloc (¤t_target,
12497 TARGET_OBJECT_TRACEFRAME_INFO, NULL);
12500 struct traceframe_info *info;
12501 struct cleanup *back_to = make_cleanup (xfree, text);
12503 info = parse_traceframe_info (text);
12504 do_cleanups (back_to);
12511 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12512 instruction on which a fast tracepoint may be placed. Returns -1
12513 if the packet is not supported, and 0 if the minimum instruction
12514 length is unknown. */
12517 remote_get_min_fast_tracepoint_insn_len (struct target_ops *self)
12519 struct remote_state *rs = get_remote_state ();
12522 /* If we're not debugging a process yet, the IPA can't be
12524 if (!target_has_execution)
12527 /* Make sure the remote is pointing at the right process. */
12528 set_general_process ();
12530 xsnprintf (rs->buf, get_remote_packet_size (), "qTMinFTPILen");
12532 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12533 if (*reply == '\0')
12537 ULONGEST min_insn_len;
12539 unpack_varlen_hex (reply, &min_insn_len);
12541 return (int) min_insn_len;
12546 remote_set_trace_buffer_size (struct target_ops *self, LONGEST val)
12548 if (packet_support (PACKET_QTBuffer_size) != PACKET_DISABLE)
12550 struct remote_state *rs = get_remote_state ();
12551 char *buf = rs->buf;
12552 char *endbuf = rs->buf + get_remote_packet_size ();
12553 enum packet_result result;
12555 gdb_assert (val >= 0 || val == -1);
12556 buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:");
12557 /* Send -1 as literal "-1" to avoid host size dependency. */
12561 buf += hexnumstr (buf, (ULONGEST) -val);
12564 buf += hexnumstr (buf, (ULONGEST) val);
12567 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
12568 result = packet_ok (rs->buf,
12569 &remote_protocol_packets[PACKET_QTBuffer_size]);
12571 if (result != PACKET_OK)
12572 warning (_("Bogus reply from target: %s"), rs->buf);
12577 remote_set_trace_notes (struct target_ops *self,
12578 const char *user, const char *notes,
12579 const char *stop_notes)
12581 struct remote_state *rs = get_remote_state ();
12583 char *buf = rs->buf;
12584 char *endbuf = rs->buf + get_remote_packet_size ();
12587 buf += xsnprintf (buf, endbuf - buf, "QTNotes:");
12590 buf += xsnprintf (buf, endbuf - buf, "user:");
12591 nbytes = bin2hex ((gdb_byte *) user, buf, strlen (user));
12597 buf += xsnprintf (buf, endbuf - buf, "notes:");
12598 nbytes = bin2hex ((gdb_byte *) notes, buf, strlen (notes));
12604 buf += xsnprintf (buf, endbuf - buf, "tstop:");
12605 nbytes = bin2hex ((gdb_byte *) stop_notes, buf, strlen (stop_notes));
12609 /* Ensure the buffer is terminated. */
12613 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
12614 if (*reply == '\0')
12617 if (strcmp (reply, "OK") != 0)
12618 error (_("Bogus reply from target: %s"), reply);
12624 remote_use_agent (struct target_ops *self, int use)
12626 if (packet_support (PACKET_QAgent) != PACKET_DISABLE)
12628 struct remote_state *rs = get_remote_state ();
12630 /* If the stub supports QAgent. */
12631 xsnprintf (rs->buf, get_remote_packet_size (), "QAgent:%d", use);
12633 getpkt (&rs->buf, &rs->buf_size, 0);
12635 if (strcmp (rs->buf, "OK") == 0)
12646 remote_can_use_agent (struct target_ops *self)
12648 return (packet_support (PACKET_QAgent) != PACKET_DISABLE);
12651 struct btrace_target_info
12653 /* The ptid of the traced thread. */
12656 /* The obtained branch trace configuration. */
12657 struct btrace_config conf;
12660 /* Reset our idea of our target's btrace configuration. */
12663 remote_btrace_reset (void)
12665 struct remote_state *rs = get_remote_state ();
12667 memset (&rs->btrace_config, 0, sizeof (rs->btrace_config));
12670 /* Check whether the target supports branch tracing. */
12673 remote_supports_btrace (struct target_ops *self, enum btrace_format format)
12675 if (packet_support (PACKET_Qbtrace_off) != PACKET_ENABLE)
12677 if (packet_support (PACKET_qXfer_btrace) != PACKET_ENABLE)
12682 case BTRACE_FORMAT_NONE:
12685 case BTRACE_FORMAT_BTS:
12686 return (packet_support (PACKET_Qbtrace_bts) == PACKET_ENABLE);
12688 case BTRACE_FORMAT_PT:
12689 /* The trace is decoded on the host. Even if our target supports it,
12690 we still need to have libipt to decode the trace. */
12691 #if defined (HAVE_LIBIPT)
12692 return (packet_support (PACKET_Qbtrace_pt) == PACKET_ENABLE);
12693 #else /* !defined (HAVE_LIBIPT) */
12695 #endif /* !defined (HAVE_LIBIPT) */
12698 internal_error (__FILE__, __LINE__, _("Unknown branch trace format"));
12701 /* Synchronize the configuration with the target. */
12704 btrace_sync_conf (const struct btrace_config *conf)
12706 struct packet_config *packet;
12707 struct remote_state *rs;
12708 char *buf, *pos, *endbuf;
12710 rs = get_remote_state ();
12712 endbuf = buf + get_remote_packet_size ();
12714 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_bts_size];
12715 if (packet_config_support (packet) == PACKET_ENABLE
12716 && conf->bts.size != rs->btrace_config.bts.size)
12719 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
12723 getpkt (&buf, &rs->buf_size, 0);
12725 if (packet_ok (buf, packet) == PACKET_ERROR)
12727 if (buf[0] == 'E' && buf[1] == '.')
12728 error (_("Failed to configure the BTS buffer size: %s"), buf + 2);
12730 error (_("Failed to configure the BTS buffer size."));
12733 rs->btrace_config.bts.size = conf->bts.size;
12736 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_pt_size];
12737 if (packet_config_support (packet) == PACKET_ENABLE
12738 && conf->pt.size != rs->btrace_config.pt.size)
12741 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
12745 getpkt (&buf, &rs->buf_size, 0);
12747 if (packet_ok (buf, packet) == PACKET_ERROR)
12749 if (buf[0] == 'E' && buf[1] == '.')
12750 error (_("Failed to configure the trace buffer size: %s"), buf + 2);
12752 error (_("Failed to configure the trace buffer size."));
12755 rs->btrace_config.pt.size = conf->pt.size;
12759 /* Read the current thread's btrace configuration from the target and
12760 store it into CONF. */
12763 btrace_read_config (struct btrace_config *conf)
12767 xml = target_read_stralloc (¤t_target,
12768 TARGET_OBJECT_BTRACE_CONF, "");
12771 struct cleanup *cleanup;
12773 cleanup = make_cleanup (xfree, xml);
12774 parse_xml_btrace_conf (conf, xml);
12775 do_cleanups (cleanup);
12779 /* Enable branch tracing. */
12781 static struct btrace_target_info *
12782 remote_enable_btrace (struct target_ops *self, ptid_t ptid,
12783 const struct btrace_config *conf)
12785 struct btrace_target_info *tinfo = NULL;
12786 struct packet_config *packet = NULL;
12787 struct remote_state *rs = get_remote_state ();
12788 char *buf = rs->buf;
12789 char *endbuf = rs->buf + get_remote_packet_size ();
12791 switch (conf->format)
12793 case BTRACE_FORMAT_BTS:
12794 packet = &remote_protocol_packets[PACKET_Qbtrace_bts];
12797 case BTRACE_FORMAT_PT:
12798 packet = &remote_protocol_packets[PACKET_Qbtrace_pt];
12802 if (packet == NULL || packet_config_support (packet) != PACKET_ENABLE)
12803 error (_("Target does not support branch tracing."));
12805 btrace_sync_conf (conf);
12807 set_general_thread (ptid);
12809 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
12811 getpkt (&rs->buf, &rs->buf_size, 0);
12813 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
12815 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
12816 error (_("Could not enable branch tracing for %s: %s"),
12817 target_pid_to_str (ptid), rs->buf + 2);
12819 error (_("Could not enable branch tracing for %s."),
12820 target_pid_to_str (ptid));
12823 tinfo = XCNEW (struct btrace_target_info);
12824 tinfo->ptid = ptid;
12826 /* If we fail to read the configuration, we lose some information, but the
12827 tracing itself is not impacted. */
12830 btrace_read_config (&tinfo->conf);
12832 CATCH (err, RETURN_MASK_ERROR)
12834 if (err.message != NULL)
12835 warning ("%s", err.message);
12842 /* Disable branch tracing. */
12845 remote_disable_btrace (struct target_ops *self,
12846 struct btrace_target_info *tinfo)
12848 struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_off];
12849 struct remote_state *rs = get_remote_state ();
12850 char *buf = rs->buf;
12851 char *endbuf = rs->buf + get_remote_packet_size ();
12853 if (packet_config_support (packet) != PACKET_ENABLE)
12854 error (_("Target does not support branch tracing."));
12856 set_general_thread (tinfo->ptid);
12858 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
12860 getpkt (&rs->buf, &rs->buf_size, 0);
12862 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
12864 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
12865 error (_("Could not disable branch tracing for %s: %s"),
12866 target_pid_to_str (tinfo->ptid), rs->buf + 2);
12868 error (_("Could not disable branch tracing for %s."),
12869 target_pid_to_str (tinfo->ptid));
12875 /* Teardown branch tracing. */
12878 remote_teardown_btrace (struct target_ops *self,
12879 struct btrace_target_info *tinfo)
12881 /* We must not talk to the target during teardown. */
12885 /* Read the branch trace. */
12887 static enum btrace_error
12888 remote_read_btrace (struct target_ops *self,
12889 struct btrace_data *btrace,
12890 struct btrace_target_info *tinfo,
12891 enum btrace_read_type type)
12893 struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace];
12894 struct cleanup *cleanup;
12898 if (packet_config_support (packet) != PACKET_ENABLE)
12899 error (_("Target does not support branch tracing."));
12901 #if !defined(HAVE_LIBEXPAT)
12902 error (_("Cannot process branch tracing result. XML parsing not supported."));
12907 case BTRACE_READ_ALL:
12910 case BTRACE_READ_NEW:
12913 case BTRACE_READ_DELTA:
12917 internal_error (__FILE__, __LINE__,
12918 _("Bad branch tracing read type: %u."),
12919 (unsigned int) type);
12922 xml = target_read_stralloc (¤t_target,
12923 TARGET_OBJECT_BTRACE, annex);
12925 return BTRACE_ERR_UNKNOWN;
12927 cleanup = make_cleanup (xfree, xml);
12928 parse_xml_btrace (btrace, xml);
12929 do_cleanups (cleanup);
12931 return BTRACE_ERR_NONE;
12934 static const struct btrace_config *
12935 remote_btrace_conf (struct target_ops *self,
12936 const struct btrace_target_info *tinfo)
12938 return &tinfo->conf;
12942 remote_augmented_libraries_svr4_read (struct target_ops *self)
12944 return (packet_support (PACKET_augmented_libraries_svr4_read_feature)
12948 /* Implementation of to_load. */
12951 remote_load (struct target_ops *self, const char *name, int from_tty)
12953 generic_load (name, from_tty);
12956 /* Accepts an integer PID; returns a string representing a file that
12957 can be opened on the remote side to get the symbols for the child
12958 process. Returns NULL if the operation is not supported. */
12961 remote_pid_to_exec_file (struct target_ops *self, int pid)
12963 static char *filename = NULL;
12964 struct inferior *inf;
12965 char *annex = NULL;
12967 if (packet_support (PACKET_qXfer_exec_file) != PACKET_ENABLE)
12970 if (filename != NULL)
12973 inf = find_inferior_pid (pid);
12975 internal_error (__FILE__, __LINE__,
12976 _("not currently attached to process %d"), pid);
12978 if (!inf->fake_pid_p)
12980 const int annex_size = 9;
12982 annex = (char *) alloca (annex_size);
12983 xsnprintf (annex, annex_size, "%x", pid);
12986 filename = target_read_stralloc (¤t_target,
12987 TARGET_OBJECT_EXEC_FILE, annex);
12992 /* Implement the to_can_do_single_step target_ops method. */
12995 remote_can_do_single_step (struct target_ops *ops)
12997 /* We can only tell whether target supports single step or not by
12998 supported s and S vCont actions if the stub supports vContSupported
12999 feature. If the stub doesn't support vContSupported feature,
13000 we have conservatively to think target doesn't supports single
13002 if (packet_support (PACKET_vContSupported) == PACKET_ENABLE)
13004 struct remote_state *rs = get_remote_state ();
13006 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
13007 remote_vcont_probe (rs);
13009 return rs->supports_vCont.s && rs->supports_vCont.S;
13015 /* Implementation of the to_execution_direction method for the remote
13018 static enum exec_direction_kind
13019 remote_execution_direction (struct target_ops *self)
13021 struct remote_state *rs = get_remote_state ();
13023 return rs->last_resume_exec_dir;
13027 init_remote_ops (void)
13029 remote_ops.to_shortname = "remote";
13030 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
13031 remote_ops.to_doc =
13032 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13033 Specify the serial device it is connected to\n\
13034 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13035 remote_ops.to_open = remote_open;
13036 remote_ops.to_close = remote_close;
13037 remote_ops.to_detach = remote_detach;
13038 remote_ops.to_disconnect = remote_disconnect;
13039 remote_ops.to_resume = remote_resume;
13040 remote_ops.to_wait = remote_wait;
13041 remote_ops.to_fetch_registers = remote_fetch_registers;
13042 remote_ops.to_store_registers = remote_store_registers;
13043 remote_ops.to_prepare_to_store = remote_prepare_to_store;
13044 remote_ops.to_files_info = remote_files_info;
13045 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
13046 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
13047 remote_ops.to_stopped_by_sw_breakpoint = remote_stopped_by_sw_breakpoint;
13048 remote_ops.to_supports_stopped_by_sw_breakpoint = remote_supports_stopped_by_sw_breakpoint;
13049 remote_ops.to_stopped_by_hw_breakpoint = remote_stopped_by_hw_breakpoint;
13050 remote_ops.to_supports_stopped_by_hw_breakpoint = remote_supports_stopped_by_hw_breakpoint;
13051 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
13052 remote_ops.to_stopped_data_address = remote_stopped_data_address;
13053 remote_ops.to_watchpoint_addr_within_range =
13054 remote_watchpoint_addr_within_range;
13055 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
13056 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
13057 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
13058 remote_ops.to_region_ok_for_hw_watchpoint
13059 = remote_region_ok_for_hw_watchpoint;
13060 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
13061 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
13062 remote_ops.to_kill = remote_kill;
13063 remote_ops.to_load = remote_load;
13064 remote_ops.to_mourn_inferior = remote_mourn;
13065 remote_ops.to_pass_signals = remote_pass_signals;
13066 remote_ops.to_set_syscall_catchpoint = remote_set_syscall_catchpoint;
13067 remote_ops.to_program_signals = remote_program_signals;
13068 remote_ops.to_thread_alive = remote_thread_alive;
13069 remote_ops.to_thread_name = remote_thread_name;
13070 remote_ops.to_update_thread_list = remote_update_thread_list;
13071 remote_ops.to_pid_to_str = remote_pid_to_str;
13072 remote_ops.to_extra_thread_info = remote_threads_extra_info;
13073 remote_ops.to_get_ada_task_ptid = remote_get_ada_task_ptid;
13074 remote_ops.to_stop = remote_stop;
13075 remote_ops.to_interrupt = remote_interrupt;
13076 remote_ops.to_pass_ctrlc = remote_pass_ctrlc;
13077 remote_ops.to_xfer_partial = remote_xfer_partial;
13078 remote_ops.to_rcmd = remote_rcmd;
13079 remote_ops.to_pid_to_exec_file = remote_pid_to_exec_file;
13080 remote_ops.to_log_command = serial_log_command;
13081 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
13082 remote_ops.to_stratum = process_stratum;
13083 remote_ops.to_has_all_memory = default_child_has_all_memory;
13084 remote_ops.to_has_memory = default_child_has_memory;
13085 remote_ops.to_has_stack = default_child_has_stack;
13086 remote_ops.to_has_registers = default_child_has_registers;
13087 remote_ops.to_has_execution = default_child_has_execution;
13088 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
13089 remote_ops.to_can_execute_reverse = remote_can_execute_reverse;
13090 remote_ops.to_magic = OPS_MAGIC;
13091 remote_ops.to_memory_map = remote_memory_map;
13092 remote_ops.to_flash_erase = remote_flash_erase;
13093 remote_ops.to_flash_done = remote_flash_done;
13094 remote_ops.to_read_description = remote_read_description;
13095 remote_ops.to_search_memory = remote_search_memory;
13096 remote_ops.to_can_async_p = remote_can_async_p;
13097 remote_ops.to_is_async_p = remote_is_async_p;
13098 remote_ops.to_async = remote_async;
13099 remote_ops.to_thread_events = remote_thread_events;
13100 remote_ops.to_can_do_single_step = remote_can_do_single_step;
13101 remote_ops.to_terminal_inferior = remote_terminal_inferior;
13102 remote_ops.to_terminal_ours = remote_terminal_ours;
13103 remote_ops.to_supports_non_stop = remote_supports_non_stop;
13104 remote_ops.to_supports_multi_process = remote_supports_multi_process;
13105 remote_ops.to_supports_disable_randomization
13106 = remote_supports_disable_randomization;
13107 remote_ops.to_filesystem_is_local = remote_filesystem_is_local;
13108 remote_ops.to_fileio_open = remote_hostio_open;
13109 remote_ops.to_fileio_pwrite = remote_hostio_pwrite;
13110 remote_ops.to_fileio_pread = remote_hostio_pread;
13111 remote_ops.to_fileio_fstat = remote_hostio_fstat;
13112 remote_ops.to_fileio_close = remote_hostio_close;
13113 remote_ops.to_fileio_unlink = remote_hostio_unlink;
13114 remote_ops.to_fileio_readlink = remote_hostio_readlink;
13115 remote_ops.to_supports_enable_disable_tracepoint = remote_supports_enable_disable_tracepoint;
13116 remote_ops.to_supports_string_tracing = remote_supports_string_tracing;
13117 remote_ops.to_supports_evaluation_of_breakpoint_conditions = remote_supports_cond_breakpoints;
13118 remote_ops.to_can_run_breakpoint_commands = remote_can_run_breakpoint_commands;
13119 remote_ops.to_trace_init = remote_trace_init;
13120 remote_ops.to_download_tracepoint = remote_download_tracepoint;
13121 remote_ops.to_can_download_tracepoint = remote_can_download_tracepoint;
13122 remote_ops.to_download_trace_state_variable
13123 = remote_download_trace_state_variable;
13124 remote_ops.to_enable_tracepoint = remote_enable_tracepoint;
13125 remote_ops.to_disable_tracepoint = remote_disable_tracepoint;
13126 remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions;
13127 remote_ops.to_trace_start = remote_trace_start;
13128 remote_ops.to_get_trace_status = remote_get_trace_status;
13129 remote_ops.to_get_tracepoint_status = remote_get_tracepoint_status;
13130 remote_ops.to_trace_stop = remote_trace_stop;
13131 remote_ops.to_trace_find = remote_trace_find;
13132 remote_ops.to_get_trace_state_variable_value
13133 = remote_get_trace_state_variable_value;
13134 remote_ops.to_save_trace_data = remote_save_trace_data;
13135 remote_ops.to_upload_tracepoints = remote_upload_tracepoints;
13136 remote_ops.to_upload_trace_state_variables
13137 = remote_upload_trace_state_variables;
13138 remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data;
13139 remote_ops.to_get_min_fast_tracepoint_insn_len = remote_get_min_fast_tracepoint_insn_len;
13140 remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing;
13141 remote_ops.to_set_circular_trace_buffer = remote_set_circular_trace_buffer;
13142 remote_ops.to_set_trace_buffer_size = remote_set_trace_buffer_size;
13143 remote_ops.to_set_trace_notes = remote_set_trace_notes;
13144 remote_ops.to_core_of_thread = remote_core_of_thread;
13145 remote_ops.to_verify_memory = remote_verify_memory;
13146 remote_ops.to_get_tib_address = remote_get_tib_address;
13147 remote_ops.to_set_permissions = remote_set_permissions;
13148 remote_ops.to_static_tracepoint_marker_at
13149 = remote_static_tracepoint_marker_at;
13150 remote_ops.to_static_tracepoint_markers_by_strid
13151 = remote_static_tracepoint_markers_by_strid;
13152 remote_ops.to_traceframe_info = remote_traceframe_info;
13153 remote_ops.to_use_agent = remote_use_agent;
13154 remote_ops.to_can_use_agent = remote_can_use_agent;
13155 remote_ops.to_supports_btrace = remote_supports_btrace;
13156 remote_ops.to_enable_btrace = remote_enable_btrace;
13157 remote_ops.to_disable_btrace = remote_disable_btrace;
13158 remote_ops.to_teardown_btrace = remote_teardown_btrace;
13159 remote_ops.to_read_btrace = remote_read_btrace;
13160 remote_ops.to_btrace_conf = remote_btrace_conf;
13161 remote_ops.to_augmented_libraries_svr4_read =
13162 remote_augmented_libraries_svr4_read;
13163 remote_ops.to_follow_fork = remote_follow_fork;
13164 remote_ops.to_follow_exec = remote_follow_exec;
13165 remote_ops.to_insert_fork_catchpoint = remote_insert_fork_catchpoint;
13166 remote_ops.to_remove_fork_catchpoint = remote_remove_fork_catchpoint;
13167 remote_ops.to_insert_vfork_catchpoint = remote_insert_vfork_catchpoint;
13168 remote_ops.to_remove_vfork_catchpoint = remote_remove_vfork_catchpoint;
13169 remote_ops.to_insert_exec_catchpoint = remote_insert_exec_catchpoint;
13170 remote_ops.to_remove_exec_catchpoint = remote_remove_exec_catchpoint;
13171 remote_ops.to_execution_direction = remote_execution_direction;
13174 /* Set up the extended remote vector by making a copy of the standard
13175 remote vector and adding to it. */
13178 init_extended_remote_ops (void)
13180 extended_remote_ops = remote_ops;
13182 extended_remote_ops.to_shortname = "extended-remote";
13183 extended_remote_ops.to_longname =
13184 "Extended remote serial target in gdb-specific protocol";
13185 extended_remote_ops.to_doc =
13186 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13187 Specify the serial device it is connected to (e.g. /dev/ttya).";
13188 extended_remote_ops.to_open = extended_remote_open;
13189 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
13190 extended_remote_ops.to_detach = extended_remote_detach;
13191 extended_remote_ops.to_attach = extended_remote_attach;
13192 extended_remote_ops.to_post_attach = extended_remote_post_attach;
13193 extended_remote_ops.to_supports_disable_randomization
13194 = extended_remote_supports_disable_randomization;
13198 remote_can_async_p (struct target_ops *ops)
13200 struct remote_state *rs = get_remote_state ();
13202 if (!target_async_permitted)
13203 /* We only enable async when the user specifically asks for it. */
13206 /* We're async whenever the serial device is. */
13207 return serial_can_async_p (rs->remote_desc);
13211 remote_is_async_p (struct target_ops *ops)
13213 struct remote_state *rs = get_remote_state ();
13215 if (!target_async_permitted)
13216 /* We only enable async when the user specifically asks for it. */
13219 /* We're async whenever the serial device is. */
13220 return serial_is_async_p (rs->remote_desc);
13223 /* Pass the SERIAL event on and up to the client. One day this code
13224 will be able to delay notifying the client of an event until the
13225 point where an entire packet has been received. */
13227 static serial_event_ftype remote_async_serial_handler;
13230 remote_async_serial_handler (struct serial *scb, void *context)
13232 /* Don't propogate error information up to the client. Instead let
13233 the client find out about the error by querying the target. */
13234 inferior_event_handler (INF_REG_EVENT, NULL);
13238 remote_async_inferior_event_handler (gdb_client_data data)
13240 inferior_event_handler (INF_REG_EVENT, NULL);
13244 remote_async (struct target_ops *ops, int enable)
13246 struct remote_state *rs = get_remote_state ();
13250 serial_async (rs->remote_desc, remote_async_serial_handler, rs);
13252 /* If there are pending events in the stop reply queue tell the
13253 event loop to process them. */
13254 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
13255 mark_async_event_handler (remote_async_inferior_event_token);
13256 /* For simplicity, below we clear the pending events token
13257 without remembering whether it is marked, so here we always
13258 mark it. If there's actually no pending notification to
13259 process, this ends up being a no-op (other than a spurious
13260 event-loop wakeup). */
13261 if (target_is_non_stop_p ())
13262 mark_async_event_handler (rs->notif_state->get_pending_events_token);
13266 serial_async (rs->remote_desc, NULL, NULL);
13267 /* If the core is disabling async, it doesn't want to be
13268 disturbed with target events. Clear all async event sources
13270 clear_async_event_handler (remote_async_inferior_event_token);
13271 if (target_is_non_stop_p ())
13272 clear_async_event_handler (rs->notif_state->get_pending_events_token);
13276 /* Implementation of the to_thread_events method. */
13279 remote_thread_events (struct target_ops *ops, int enable)
13281 struct remote_state *rs = get_remote_state ();
13282 size_t size = get_remote_packet_size ();
13284 if (packet_support (PACKET_QThreadEvents) == PACKET_DISABLE)
13287 xsnprintf (rs->buf, size, "QThreadEvents:%x", enable ? 1 : 0);
13289 getpkt (&rs->buf, &rs->buf_size, 0);
13291 switch (packet_ok (rs->buf,
13292 &remote_protocol_packets[PACKET_QThreadEvents]))
13295 if (strcmp (rs->buf, "OK") != 0)
13296 error (_("Remote refused setting thread events: %s"), rs->buf);
13299 warning (_("Remote failure reply: %s"), rs->buf);
13301 case PACKET_UNKNOWN:
13307 set_remote_cmd (char *args, int from_tty)
13309 help_list (remote_set_cmdlist, "set remote ", all_commands, gdb_stdout);
13313 show_remote_cmd (char *args, int from_tty)
13315 /* We can't just use cmd_show_list here, because we want to skip
13316 the redundant "show remote Z-packet" and the legacy aliases. */
13317 struct cleanup *showlist_chain;
13318 struct cmd_list_element *list = remote_show_cmdlist;
13319 struct ui_out *uiout = current_uiout;
13321 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
13322 for (; list != NULL; list = list->next)
13323 if (strcmp (list->name, "Z-packet") == 0)
13325 else if (list->type == not_set_cmd)
13326 /* Alias commands are exactly like the original, except they
13327 don't have the normal type. */
13331 struct cleanup *option_chain
13332 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
13334 ui_out_field_string (uiout, "name", list->name);
13335 ui_out_text (uiout, ": ");
13336 if (list->type == show_cmd)
13337 do_show_command ((char *) NULL, from_tty, list);
13339 cmd_func (list, NULL, from_tty);
13340 /* Close the tuple. */
13341 do_cleanups (option_chain);
13344 /* Close the tuple. */
13345 do_cleanups (showlist_chain);
13349 /* Function to be called whenever a new objfile (shlib) is detected. */
13351 remote_new_objfile (struct objfile *objfile)
13353 struct remote_state *rs = get_remote_state ();
13355 if (rs->remote_desc != 0) /* Have a remote connection. */
13356 remote_check_symbols ();
13359 /* Pull all the tracepoints defined on the target and create local
13360 data structures representing them. We don't want to create real
13361 tracepoints yet, we don't want to mess up the user's existing
13365 remote_upload_tracepoints (struct target_ops *self, struct uploaded_tp **utpp)
13367 struct remote_state *rs = get_remote_state ();
13370 /* Ask for a first packet of tracepoint definition. */
13372 getpkt (&rs->buf, &rs->buf_size, 0);
13374 while (*p && *p != 'l')
13376 parse_tracepoint_definition (p, utpp);
13377 /* Ask for another packet of tracepoint definition. */
13379 getpkt (&rs->buf, &rs->buf_size, 0);
13386 remote_upload_trace_state_variables (struct target_ops *self,
13387 struct uploaded_tsv **utsvp)
13389 struct remote_state *rs = get_remote_state ();
13392 /* Ask for a first packet of variable definition. */
13394 getpkt (&rs->buf, &rs->buf_size, 0);
13396 while (*p && *p != 'l')
13398 parse_tsv_definition (p, utsvp);
13399 /* Ask for another packet of variable definition. */
13401 getpkt (&rs->buf, &rs->buf_size, 0);
13407 /* The "set/show range-stepping" show hook. */
13410 show_range_stepping (struct ui_file *file, int from_tty,
13411 struct cmd_list_element *c,
13414 fprintf_filtered (file,
13415 _("Debugger's willingness to use range stepping "
13416 "is %s.\n"), value);
13419 /* The "set/show range-stepping" set hook. */
13422 set_range_stepping (char *ignore_args, int from_tty,
13423 struct cmd_list_element *c)
13425 struct remote_state *rs = get_remote_state ();
13427 /* Whene enabling, check whether range stepping is actually
13428 supported by the target, and warn if not. */
13429 if (use_range_stepping)
13431 if (rs->remote_desc != NULL)
13433 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
13434 remote_vcont_probe (rs);
13436 if (packet_support (PACKET_vCont) == PACKET_ENABLE
13437 && rs->supports_vCont.r)
13441 warning (_("Range stepping is not supported by the current target"));
13446 _initialize_remote (void)
13448 struct cmd_list_element *cmd;
13449 const char *cmd_name;
13451 /* architecture specific data */
13452 remote_gdbarch_data_handle =
13453 gdbarch_data_register_post_init (init_remote_state);
13454 remote_g_packet_data_handle =
13455 gdbarch_data_register_pre_init (remote_g_packet_data_init);
13458 = register_program_space_data_with_cleanup (NULL,
13459 remote_pspace_data_cleanup);
13461 /* Initialize the per-target state. At the moment there is only one
13462 of these, not one per target. Only one target is active at a
13464 remote_state = new_remote_state ();
13466 init_remote_ops ();
13467 add_target (&remote_ops);
13469 init_extended_remote_ops ();
13470 add_target (&extended_remote_ops);
13472 /* Hook into new objfile notification. */
13473 observer_attach_new_objfile (remote_new_objfile);
13474 /* We're no longer interested in notification events of an inferior
13476 observer_attach_inferior_exit (discard_pending_stop_replies);
13479 init_remote_threadtests ();
13482 stop_reply_queue = QUEUE_alloc (stop_reply_p, stop_reply_xfree);
13483 /* set/show remote ... */
13485 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
13486 Remote protocol specific variables\n\
13487 Configure various remote-protocol specific variables such as\n\
13488 the packets being used"),
13489 &remote_set_cmdlist, "set remote ",
13490 0 /* allow-unknown */, &setlist);
13491 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
13492 Remote protocol specific variables\n\
13493 Configure various remote-protocol specific variables such as\n\
13494 the packets being used"),
13495 &remote_show_cmdlist, "show remote ",
13496 0 /* allow-unknown */, &showlist);
13498 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
13499 Compare section data on target to the exec file.\n\
13500 Argument is a single section name (default: all loaded sections).\n\
13501 To compare only read-only loaded sections, specify the -r option."),
13504 add_cmd ("packet", class_maintenance, packet_command, _("\
13505 Send an arbitrary packet to a remote target.\n\
13506 maintenance packet TEXT\n\
13507 If GDB is talking to an inferior via the GDB serial protocol, then\n\
13508 this command sends the string TEXT to the inferior, and displays the\n\
13509 response packet. GDB supplies the initial `$' character, and the\n\
13510 terminating `#' character and checksum."),
13513 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
13514 Set whether to send break if interrupted."), _("\
13515 Show whether to send break if interrupted."), _("\
13516 If set, a break, instead of a cntrl-c, is sent to the remote target."),
13517 set_remotebreak, show_remotebreak,
13518 &setlist, &showlist);
13519 cmd_name = "remotebreak";
13520 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
13521 deprecate_cmd (cmd, "set remote interrupt-sequence");
13522 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
13523 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
13524 deprecate_cmd (cmd, "show remote interrupt-sequence");
13526 add_setshow_enum_cmd ("interrupt-sequence", class_support,
13527 interrupt_sequence_modes, &interrupt_sequence_mode,
13529 Set interrupt sequence to remote target."), _("\
13530 Show interrupt sequence to remote target."), _("\
13531 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
13532 NULL, show_interrupt_sequence,
13533 &remote_set_cmdlist,
13534 &remote_show_cmdlist);
13536 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
13537 &interrupt_on_connect, _("\
13538 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13539 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13540 If set, interrupt sequence is sent to remote target."),
13542 &remote_set_cmdlist, &remote_show_cmdlist);
13544 /* Install commands for configuring memory read/write packets. */
13546 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
13547 Set the maximum number of bytes per memory write packet (deprecated)."),
13549 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
13550 Show the maximum number of bytes per memory write packet (deprecated)."),
13552 add_cmd ("memory-write-packet-size", no_class,
13553 set_memory_write_packet_size, _("\
13554 Set the maximum number of bytes per memory-write packet.\n\
13555 Specify the number of bytes in a packet or 0 (zero) for the\n\
13556 default packet size. The actual limit is further reduced\n\
13557 dependent on the target. Specify ``fixed'' to disable the\n\
13558 further restriction and ``limit'' to enable that restriction."),
13559 &remote_set_cmdlist);
13560 add_cmd ("memory-read-packet-size", no_class,
13561 set_memory_read_packet_size, _("\
13562 Set the maximum number of bytes per memory-read packet.\n\
13563 Specify the number of bytes in a packet or 0 (zero) for the\n\
13564 default packet size. The actual limit is further reduced\n\
13565 dependent on the target. Specify ``fixed'' to disable the\n\
13566 further restriction and ``limit'' to enable that restriction."),
13567 &remote_set_cmdlist);
13568 add_cmd ("memory-write-packet-size", no_class,
13569 show_memory_write_packet_size,
13570 _("Show the maximum number of bytes per memory-write packet."),
13571 &remote_show_cmdlist);
13572 add_cmd ("memory-read-packet-size", no_class,
13573 show_memory_read_packet_size,
13574 _("Show the maximum number of bytes per memory-read packet."),
13575 &remote_show_cmdlist);
13577 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
13578 &remote_hw_watchpoint_limit, _("\
13579 Set the maximum number of target hardware watchpoints."), _("\
13580 Show the maximum number of target hardware watchpoints."), _("\
13581 Specify a negative limit for unlimited."),
13582 NULL, NULL, /* FIXME: i18n: The maximum
13583 number of target hardware
13584 watchpoints is %s. */
13585 &remote_set_cmdlist, &remote_show_cmdlist);
13586 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class,
13587 &remote_hw_watchpoint_length_limit, _("\
13588 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
13589 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
13590 Specify a negative limit for unlimited."),
13591 NULL, NULL, /* FIXME: i18n: The maximum
13592 length (in bytes) of a target
13593 hardware watchpoint is %s. */
13594 &remote_set_cmdlist, &remote_show_cmdlist);
13595 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
13596 &remote_hw_breakpoint_limit, _("\
13597 Set the maximum number of target hardware breakpoints."), _("\
13598 Show the maximum number of target hardware breakpoints."), _("\
13599 Specify a negative limit for unlimited."),
13600 NULL, NULL, /* FIXME: i18n: The maximum
13601 number of target hardware
13602 breakpoints is %s. */
13603 &remote_set_cmdlist, &remote_show_cmdlist);
13605 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure,
13606 &remote_address_size, _("\
13607 Set the maximum size of the address (in bits) in a memory packet."), _("\
13608 Show the maximum size of the address (in bits) in a memory packet."), NULL,
13610 NULL, /* FIXME: i18n: */
13611 &setlist, &showlist);
13613 init_all_packet_configs ();
13615 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
13616 "X", "binary-download", 1);
13618 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
13619 "vCont", "verbose-resume", 0);
13621 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
13622 "QPassSignals", "pass-signals", 0);
13624 add_packet_config_cmd (&remote_protocol_packets[PACKET_QCatchSyscalls],
13625 "QCatchSyscalls", "catch-syscalls", 0);
13627 add_packet_config_cmd (&remote_protocol_packets[PACKET_QProgramSignals],
13628 "QProgramSignals", "program-signals", 0);
13630 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
13631 "qSymbol", "symbol-lookup", 0);
13633 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
13634 "P", "set-register", 1);
13636 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
13637 "p", "fetch-register", 1);
13639 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
13640 "Z0", "software-breakpoint", 0);
13642 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
13643 "Z1", "hardware-breakpoint", 0);
13645 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
13646 "Z2", "write-watchpoint", 0);
13648 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
13649 "Z3", "read-watchpoint", 0);
13651 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
13652 "Z4", "access-watchpoint", 0);
13654 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
13655 "qXfer:auxv:read", "read-aux-vector", 0);
13657 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_exec_file],
13658 "qXfer:exec-file:read", "pid-to-exec-file", 0);
13660 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
13661 "qXfer:features:read", "target-features", 0);
13663 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
13664 "qXfer:libraries:read", "library-info", 0);
13666 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4],
13667 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
13669 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
13670 "qXfer:memory-map:read", "memory-map", 0);
13672 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
13673 "qXfer:spu:read", "read-spu-object", 0);
13675 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
13676 "qXfer:spu:write", "write-spu-object", 0);
13678 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
13679 "qXfer:osdata:read", "osdata", 0);
13681 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
13682 "qXfer:threads:read", "threads", 0);
13684 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
13685 "qXfer:siginfo:read", "read-siginfo-object", 0);
13687 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
13688 "qXfer:siginfo:write", "write-siginfo-object", 0);
13690 add_packet_config_cmd
13691 (&remote_protocol_packets[PACKET_qXfer_traceframe_info],
13692 "qXfer:traceframe-info:read", "traceframe-info", 0);
13694 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_uib],
13695 "qXfer:uib:read", "unwind-info-block", 0);
13697 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
13698 "qGetTLSAddr", "get-thread-local-storage-address",
13701 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr],
13702 "qGetTIBAddr", "get-thread-information-block-address",
13705 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
13706 "bc", "reverse-continue", 0);
13708 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
13709 "bs", "reverse-step", 0);
13711 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
13712 "qSupported", "supported-packets", 0);
13714 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
13715 "qSearch:memory", "search-memory", 0);
13717 add_packet_config_cmd (&remote_protocol_packets[PACKET_qTStatus],
13718 "qTStatus", "trace-status", 0);
13720 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_setfs],
13721 "vFile:setfs", "hostio-setfs", 0);
13723 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
13724 "vFile:open", "hostio-open", 0);
13726 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
13727 "vFile:pread", "hostio-pread", 0);
13729 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
13730 "vFile:pwrite", "hostio-pwrite", 0);
13732 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
13733 "vFile:close", "hostio-close", 0);
13735 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
13736 "vFile:unlink", "hostio-unlink", 0);
13738 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink],
13739 "vFile:readlink", "hostio-readlink", 0);
13741 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_fstat],
13742 "vFile:fstat", "hostio-fstat", 0);
13744 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
13745 "vAttach", "attach", 0);
13747 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
13750 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
13751 "QStartNoAckMode", "noack", 0);
13753 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
13754 "vKill", "kill", 0);
13756 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
13757 "qAttached", "query-attached", 0);
13759 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
13760 "ConditionalTracepoints",
13761 "conditional-tracepoints", 0);
13763 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints],
13764 "ConditionalBreakpoints",
13765 "conditional-breakpoints", 0);
13767 add_packet_config_cmd (&remote_protocol_packets[PACKET_BreakpointCommands],
13768 "BreakpointCommands",
13769 "breakpoint-commands", 0);
13771 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
13772 "FastTracepoints", "fast-tracepoints", 0);
13774 add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource],
13775 "TracepointSource", "TracepointSource", 0);
13777 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow],
13778 "QAllow", "allow", 0);
13780 add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints],
13781 "StaticTracepoints", "static-tracepoints", 0);
13783 add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace],
13784 "InstallInTrace", "install-in-trace", 0);
13786 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read],
13787 "qXfer:statictrace:read", "read-sdata-object", 0);
13789 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic],
13790 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
13792 add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization],
13793 "QDisableRandomization", "disable-randomization", 0);
13795 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAgent],
13796 "QAgent", "agent", 0);
13798 add_packet_config_cmd (&remote_protocol_packets[PACKET_QTBuffer_size],
13799 "QTBuffer:size", "trace-buffer-size", 0);
13801 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_off],
13802 "Qbtrace:off", "disable-btrace", 0);
13804 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts],
13805 "Qbtrace:bts", "enable-btrace-bts", 0);
13807 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_pt],
13808 "Qbtrace:pt", "enable-btrace-pt", 0);
13810 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace],
13811 "qXfer:btrace", "read-btrace", 0);
13813 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace_conf],
13814 "qXfer:btrace-conf", "read-btrace-conf", 0);
13816 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_bts_size],
13817 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
13819 add_packet_config_cmd (&remote_protocol_packets[PACKET_multiprocess_feature],
13820 "multiprocess-feature", "multiprocess-feature", 0);
13822 add_packet_config_cmd (&remote_protocol_packets[PACKET_swbreak_feature],
13823 "swbreak-feature", "swbreak-feature", 0);
13825 add_packet_config_cmd (&remote_protocol_packets[PACKET_hwbreak_feature],
13826 "hwbreak-feature", "hwbreak-feature", 0);
13828 add_packet_config_cmd (&remote_protocol_packets[PACKET_fork_event_feature],
13829 "fork-event-feature", "fork-event-feature", 0);
13831 add_packet_config_cmd (&remote_protocol_packets[PACKET_vfork_event_feature],
13832 "vfork-event-feature", "vfork-event-feature", 0);
13834 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_pt_size],
13835 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
13837 add_packet_config_cmd (&remote_protocol_packets[PACKET_vContSupported],
13838 "vContSupported", "verbose-resume-supported", 0);
13840 add_packet_config_cmd (&remote_protocol_packets[PACKET_exec_event_feature],
13841 "exec-event-feature", "exec-event-feature", 0);
13843 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCtrlC],
13844 "vCtrlC", "ctrl-c", 0);
13846 add_packet_config_cmd (&remote_protocol_packets[PACKET_QThreadEvents],
13847 "QThreadEvents", "thread-events", 0);
13849 add_packet_config_cmd (&remote_protocol_packets[PACKET_no_resumed],
13850 "N stop reply", "no-resumed-stop-reply", 0);
13852 /* Assert that we've registered "set remote foo-packet" commands
13853 for all packet configs. */
13857 for (i = 0; i < PACKET_MAX; i++)
13859 /* Ideally all configs would have a command associated. Some
13860 still don't though. */
13865 case PACKET_QNonStop:
13866 case PACKET_EnableDisableTracepoints_feature:
13867 case PACKET_tracenz_feature:
13868 case PACKET_DisconnectedTracing_feature:
13869 case PACKET_augmented_libraries_svr4_read_feature:
13871 /* Additions to this list need to be well justified:
13872 pre-existing packets are OK; new packets are not. */
13880 /* This catches both forgetting to add a config command, and
13881 forgetting to remove a packet from the exception list. */
13882 gdb_assert (excepted == (remote_protocol_packets[i].name == NULL));
13886 /* Keep the old ``set remote Z-packet ...'' working. Each individual
13887 Z sub-packet has its own set and show commands, but users may
13888 have sets to this variable in their .gdbinit files (or in their
13890 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
13891 &remote_Z_packet_detect, _("\
13892 Set use of remote protocol `Z' packets"), _("\
13893 Show use of remote protocol `Z' packets "), _("\
13894 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
13896 set_remote_protocol_Z_packet_cmd,
13897 show_remote_protocol_Z_packet_cmd,
13898 /* FIXME: i18n: Use of remote protocol
13899 `Z' packets is %s. */
13900 &remote_set_cmdlist, &remote_show_cmdlist);
13902 add_prefix_cmd ("remote", class_files, remote_command, _("\
13903 Manipulate files on the remote system\n\
13904 Transfer files to and from the remote target system."),
13905 &remote_cmdlist, "remote ",
13906 0 /* allow-unknown */, &cmdlist);
13908 add_cmd ("put", class_files, remote_put_command,
13909 _("Copy a local file to the remote system."),
13912 add_cmd ("get", class_files, remote_get_command,
13913 _("Copy a remote file to the local system."),
13916 add_cmd ("delete", class_files, remote_delete_command,
13917 _("Delete a remote file."),
13920 add_setshow_string_noescape_cmd ("exec-file", class_files,
13921 &remote_exec_file_var, _("\
13922 Set the remote pathname for \"run\""), _("\
13923 Show the remote pathname for \"run\""), NULL,
13924 set_remote_exec_file,
13925 show_remote_exec_file,
13926 &remote_set_cmdlist,
13927 &remote_show_cmdlist);
13929 add_setshow_boolean_cmd ("range-stepping", class_run,
13930 &use_range_stepping, _("\
13931 Enable or disable range stepping."), _("\
13932 Show whether target-assisted range stepping is enabled."), _("\
13933 If on, and the target supports it, when stepping a source line, GDB\n\
13934 tells the target to step the corresponding range of addresses itself instead\n\
13935 of issuing multiple single-steps. This speeds up source level\n\
13936 stepping. If off, GDB always issues single-steps, even if range\n\
13937 stepping is supported by the target. The default is on."),
13938 set_range_stepping,
13939 show_range_stepping,
13943 /* Eventually initialize fileio. See fileio.c */
13944 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
13946 /* Take advantage of the fact that the TID field is not used, to tag
13947 special ptids with it set to != 0. */
13948 magic_null_ptid = ptid_build (42000, -1, 1);
13949 not_sent_ptid = ptid_build (42000, -2, 1);
13950 any_thread_ptid = ptid_build (42000, 0, 1);
13952 target_buf_size = 2048;
13953 target_buf = (char *) xmalloc (target_buf_size);