1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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 "event-loop.h"
51 #include "event-top.h"
57 #include "gdbcore.h" /* for exec_bfd */
59 #include "remote-fileio.h"
60 #include "gdb/fileio.h"
62 #include "xml-support.h"
64 #include "memory-map.h"
66 #include "tracepoint.h"
72 /* Temp hacks for tracepoint encoding migration. */
73 static char *target_buf;
74 static long target_buf_size;
76 /* The size to align memory write packets, when practical. The protocol
77 does not guarantee any alignment, and gdb will generate short
78 writes and unaligned writes, but even as a best-effort attempt this
79 can improve bulk transfers. For instance, if a write is misaligned
80 relative to the target's data bus, the stub may need to make an extra
81 round trip fetching data from the target. This doesn't make a
82 huge difference, but it's easy to do, so we try to be helpful.
84 The alignment chosen is arbitrary; usually data bus width is
85 important here, not the possibly larger cache line size. */
86 enum { REMOTE_ALIGN_WRITES = 16 };
88 /* Prototypes for local functions. */
89 static void async_cleanup_sigint_signal_handler (void *dummy);
90 static int getpkt_sane (char **buf, long *sizeof_buf, int forever);
91 static int getpkt_or_notif_sane (char **buf, long *sizeof_buf,
92 int forever, int *is_notif);
94 static void async_handle_remote_sigint (int);
95 static void async_handle_remote_sigint_twice (int);
97 static void remote_files_info (struct target_ops *ignore);
99 static void remote_prepare_to_store (struct target_ops *self,
100 struct regcache *regcache);
102 static void remote_open_1 (const char *, int, struct target_ops *,
105 static void remote_close (struct target_ops *self);
107 static void remote_mourn (struct target_ops *ops);
109 static void extended_remote_restart (void);
111 static void extended_remote_mourn (struct target_ops *);
113 static void remote_mourn_1 (struct target_ops *);
115 static void remote_send (char **buf, long *sizeof_buf_p);
117 static int readchar (int timeout);
119 static void remote_serial_write (const char *str, int len);
121 static void remote_kill (struct target_ops *ops);
123 static int remote_can_async_p (struct target_ops *);
125 static int remote_is_async_p (struct target_ops *);
127 static void remote_async (struct target_ops *ops,
128 void (*callback) (enum inferior_event_type event_type,
132 static void sync_remote_interrupt_twice (int signo);
134 static void interrupt_query (void);
136 static void set_general_thread (struct ptid ptid);
137 static void set_continue_thread (struct ptid ptid);
139 static void get_offsets (void);
141 static void skip_frame (void);
143 static long read_frame (char **buf_p, long *sizeof_buf);
145 static int hexnumlen (ULONGEST num);
147 static void init_remote_ops (void);
149 static void init_extended_remote_ops (void);
151 static void remote_stop (struct target_ops *self, ptid_t);
153 static int stubhex (int ch);
155 static int hexnumstr (char *, ULONGEST);
157 static int hexnumnstr (char *, ULONGEST, int);
159 static CORE_ADDR remote_address_masked (CORE_ADDR);
161 static void print_packet (const char *);
163 static void compare_sections_command (char *, int);
165 static void packet_command (char *, int);
167 static int stub_unpack_int (char *buff, int fieldlength);
169 static ptid_t remote_current_thread (ptid_t oldptid);
171 static int putpkt_binary (const char *buf, int cnt);
173 static void check_binary_download (CORE_ADDR addr);
175 struct packet_config;
177 static void show_packet_config_cmd (struct packet_config *config);
179 static void show_remote_protocol_packet_cmd (struct ui_file *file,
181 struct cmd_list_element *c,
184 static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid);
185 static ptid_t read_ptid (char *buf, char **obuf);
187 static void remote_set_permissions (struct target_ops *self);
190 static int remote_get_trace_status (struct target_ops *self,
191 struct trace_status *ts);
193 static int remote_upload_tracepoints (struct target_ops *self,
194 struct uploaded_tp **utpp);
196 static int remote_upload_trace_state_variables (struct target_ops *self,
197 struct uploaded_tsv **utsvp);
199 static void remote_query_supported (void);
201 static void remote_check_symbols (void);
203 void _initialize_remote (void);
206 static void stop_reply_xfree (struct stop_reply *);
207 static void remote_parse_stop_reply (char *, struct stop_reply *);
208 static void push_stop_reply (struct stop_reply *);
209 static void discard_pending_stop_replies_in_queue (struct remote_state *);
210 static int peek_stop_reply (ptid_t ptid);
212 static void remote_async_inferior_event_handler (gdb_client_data);
214 static void remote_terminal_ours (struct target_ops *self);
216 static int remote_read_description_p (struct target_ops *target);
218 static void remote_console_output (char *msg);
220 static int remote_supports_cond_breakpoints (struct target_ops *self);
222 static int remote_can_run_breakpoint_commands (struct target_ops *self);
224 static void remote_btrace_reset (void);
228 static struct cmd_list_element *remote_cmdlist;
230 /* For "set remote" and "show remote". */
232 static struct cmd_list_element *remote_set_cmdlist;
233 static struct cmd_list_element *remote_show_cmdlist;
235 /* Stub vCont actions support.
237 Each field is a boolean flag indicating whether the stub reports
238 support for the corresponding action. */
240 struct vCont_action_support
249 /* Controls whether GDB is willing to use range stepping. */
251 static int use_range_stepping = 1;
253 #define OPAQUETHREADBYTES 8
255 /* a 64 bit opaque identifier */
256 typedef unsigned char threadref[OPAQUETHREADBYTES];
258 /* About this many threadisds fit in a packet. */
260 #define MAXTHREADLISTRESULTS 32
262 /* Description of the remote protocol state for the currently
263 connected target. This is per-target state, and independent of the
264 selected architecture. */
268 /* A buffer to use for incoming packets, and its current size. The
269 buffer is grown dynamically for larger incoming packets.
270 Outgoing packets may also be constructed in this buffer.
271 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
272 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
277 /* True if we're going through initial connection setup (finding out
278 about the remote side's threads, relocating symbols, etc.). */
281 /* If we negotiated packet size explicitly (and thus can bypass
282 heuristics for the largest packet size that will not overflow
283 a buffer in the stub), this will be set to that packet size.
284 Otherwise zero, meaning to use the guessed size. */
285 long explicit_packet_size;
287 /* remote_wait is normally called when the target is running and
288 waits for a stop reply packet. But sometimes we need to call it
289 when the target is already stopped. We can send a "?" packet
290 and have remote_wait read the response. Or, if we already have
291 the response, we can stash it in BUF and tell remote_wait to
292 skip calling getpkt. This flag is set when BUF contains a
293 stop reply packet and the target is not waiting. */
294 int cached_wait_status;
296 /* True, if in no ack mode. That is, neither GDB nor the stub will
297 expect acks from each other. The connection is assumed to be
301 /* True if we're connected in extended remote mode. */
304 /* True if we resumed the target and we're waiting for the target to
305 stop. In the mean time, we can't start another command/query.
306 The remote server wouldn't be ready to process it, so we'd
307 timeout waiting for a reply that would never come and eventually
308 we'd close the connection. This can happen in asynchronous mode
309 because we allow GDB commands while the target is running. */
310 int waiting_for_stop_reply;
312 /* The status of the stub support for the various vCont actions. */
313 struct vCont_action_support supports_vCont;
315 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
316 responded to that. */
319 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
320 remote_open knows that we don't have a file open when the program
322 struct serial *remote_desc;
324 /* These are the threads which we last sent to the remote system. The
325 TID member will be -1 for all or -2 for not sent yet. */
326 ptid_t general_thread;
327 ptid_t continue_thread;
329 /* This is the traceframe which we last selected on the remote system.
330 It will be -1 if no traceframe is selected. */
331 int remote_traceframe_number;
333 char *last_pass_packet;
335 /* The last QProgramSignals packet sent to the target. We bypass
336 sending a new program signals list down to the target if the new
337 packet is exactly the same as the last we sent. IOW, we only let
338 the target know about program signals list changes. */
339 char *last_program_signals_packet;
341 enum gdb_signal last_sent_signal;
345 char *finished_object;
346 char *finished_annex;
347 ULONGEST finished_offset;
349 /* Should we try the 'ThreadInfo' query packet?
351 This variable (NOT available to the user: auto-detect only!)
352 determines whether GDB will use the new, simpler "ThreadInfo"
353 query or the older, more complex syntax for thread queries.
354 This is an auto-detect variable (set to true at each connect,
355 and set to false when the target fails to recognize it). */
356 int use_threadinfo_query;
357 int use_threadextra_query;
359 void (*async_client_callback) (enum inferior_event_type event_type,
361 void *async_client_context;
363 /* This is set to the data address of the access causing the target
364 to stop for a watchpoint. */
365 CORE_ADDR remote_watch_data_address;
367 /* Whether the target stopped for a breakpoint/watchpoint. */
368 enum target_stop_reason stop_reason;
370 threadref echo_nextthread;
371 threadref nextthread;
372 threadref resultthreadlist[MAXTHREADLISTRESULTS];
374 /* The state of remote notification. */
375 struct remote_notif_state *notif_state;
377 /* The branch trace configuration. */
378 struct btrace_config btrace_config;
381 /* Private data that we'll store in (struct thread_info)->private. */
382 struct private_thread_info
389 free_private_thread_info (struct private_thread_info *info)
395 /* This data could be associated with a target, but we do not always
396 have access to the current target when we need it, so for now it is
397 static. This will be fine for as long as only one target is in use
399 static struct remote_state *remote_state;
401 static struct remote_state *
402 get_remote_state_raw (void)
407 /* Allocate a new struct remote_state with xmalloc, initialize it, and
410 static struct remote_state *
411 new_remote_state (void)
413 struct remote_state *result = XCNEW (struct remote_state);
415 /* The default buffer size is unimportant; it will be expanded
416 whenever a larger buffer is needed. */
417 result->buf_size = 400;
418 result->buf = xmalloc (result->buf_size);
419 result->remote_traceframe_number = -1;
420 result->last_sent_signal = GDB_SIGNAL_0;
425 /* Description of the remote protocol for a given architecture. */
429 long offset; /* Offset into G packet. */
430 long regnum; /* GDB's internal register number. */
431 LONGEST pnum; /* Remote protocol register number. */
432 int in_g_packet; /* Always part of G packet. */
433 /* long size in bytes; == register_size (target_gdbarch (), regnum);
435 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
439 struct remote_arch_state
441 /* Description of the remote protocol registers. */
442 long sizeof_g_packet;
444 /* Description of the remote protocol registers indexed by REGNUM
445 (making an array gdbarch_num_regs in size). */
446 struct packet_reg *regs;
448 /* This is the size (in chars) of the first response to the ``g''
449 packet. It is used as a heuristic when determining the maximum
450 size of memory-read and memory-write packets. A target will
451 typically only reserve a buffer large enough to hold the ``g''
452 packet. The size does not include packet overhead (headers and
454 long actual_register_packet_size;
456 /* This is the maximum size (in chars) of a non read/write packet.
457 It is also used as a cap on the size of read/write packets. */
458 long remote_packet_size;
461 /* Utility: generate error from an incoming stub packet. */
463 trace_error (char *buf)
466 return; /* not an error msg */
469 case '1': /* malformed packet error */
470 if (*++buf == '0') /* general case: */
471 error (_("remote.c: error in outgoing packet."));
473 error (_("remote.c: error in outgoing packet at field #%ld."),
474 strtol (buf, NULL, 16));
476 error (_("Target returns error code '%s'."), buf);
480 /* Utility: wait for reply from stub, while accepting "O" packets. */
482 remote_get_noisy_reply (char **buf_p,
485 do /* Loop on reply from remote stub. */
489 QUIT; /* Allow user to bail out with ^C. */
490 getpkt (buf_p, sizeof_buf, 0);
494 else if (startswith (buf, "qRelocInsn:"))
497 CORE_ADDR from, to, org_to;
499 int adjusted_size = 0;
500 volatile struct gdb_exception ex;
503 p = buf + strlen ("qRelocInsn:");
504 pp = unpack_varlen_hex (p, &ul);
506 error (_("invalid qRelocInsn packet: %s"), buf);
510 unpack_varlen_hex (p, &ul);
515 TRY_CATCH (ex, RETURN_MASK_ALL)
517 gdbarch_relocate_instruction (target_gdbarch (), &to, from);
522 if (ex.error == MEMORY_ERROR)
524 /* Propagate memory errors silently back to the
525 target. The stub may have limited the range of
526 addresses we can write to, for example. */
530 /* Something unexpectedly bad happened. Be verbose
531 so we can tell what, and propagate the error back
532 to the stub, so it doesn't get stuck waiting for
534 exception_fprintf (gdb_stderr, ex,
535 _("warning: relocating instruction: "));
542 adjusted_size = to - org_to;
544 xsnprintf (buf, *sizeof_buf, "qRelocInsn:%x", adjusted_size);
548 else if (buf[0] == 'O' && buf[1] != 'K')
549 remote_console_output (buf + 1); /* 'O' message from stub */
551 return buf; /* Here's the actual reply. */
556 /* Handle for retreving the remote protocol data from gdbarch. */
557 static struct gdbarch_data *remote_gdbarch_data_handle;
559 static struct remote_arch_state *
560 get_remote_arch_state (void)
562 return gdbarch_data (target_gdbarch (), remote_gdbarch_data_handle);
565 /* Fetch the global remote target state. */
567 static struct remote_state *
568 get_remote_state (void)
570 /* Make sure that the remote architecture state has been
571 initialized, because doing so might reallocate rs->buf. Any
572 function which calls getpkt also needs to be mindful of changes
573 to rs->buf, but this call limits the number of places which run
575 get_remote_arch_state ();
577 return get_remote_state_raw ();
581 compare_pnums (const void *lhs_, const void *rhs_)
583 const struct packet_reg * const *lhs = lhs_;
584 const struct packet_reg * const *rhs = rhs_;
586 if ((*lhs)->pnum < (*rhs)->pnum)
588 else if ((*lhs)->pnum == (*rhs)->pnum)
595 map_regcache_remote_table (struct gdbarch *gdbarch, struct packet_reg *regs)
597 int regnum, num_remote_regs, offset;
598 struct packet_reg **remote_regs;
600 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
602 struct packet_reg *r = ®s[regnum];
604 if (register_size (gdbarch, regnum) == 0)
605 /* Do not try to fetch zero-sized (placeholder) registers. */
608 r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
613 /* Define the g/G packet format as the contents of each register
614 with a remote protocol number, in order of ascending protocol
617 remote_regs = alloca (gdbarch_num_regs (gdbarch)
618 * sizeof (struct packet_reg *));
619 for (num_remote_regs = 0, regnum = 0;
620 regnum < gdbarch_num_regs (gdbarch);
622 if (regs[regnum].pnum != -1)
623 remote_regs[num_remote_regs++] = ®s[regnum];
625 qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
628 for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
630 remote_regs[regnum]->in_g_packet = 1;
631 remote_regs[regnum]->offset = offset;
632 offset += register_size (gdbarch, remote_regs[regnum]->regnum);
638 /* Given the architecture described by GDBARCH, return the remote
639 protocol register's number and the register's offset in the g/G
640 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
641 If the target does not have a mapping for REGNUM, return false,
642 otherwise, return true. */
645 remote_register_number_and_offset (struct gdbarch *gdbarch, int regnum,
646 int *pnum, int *poffset)
649 struct packet_reg *regs;
650 struct cleanup *old_chain;
652 gdb_assert (regnum < gdbarch_num_regs (gdbarch));
654 regs = xcalloc (gdbarch_num_regs (gdbarch), sizeof (struct packet_reg));
655 old_chain = make_cleanup (xfree, regs);
657 sizeof_g_packet = map_regcache_remote_table (gdbarch, regs);
659 *pnum = regs[regnum].pnum;
660 *poffset = regs[regnum].offset;
662 do_cleanups (old_chain);
668 init_remote_state (struct gdbarch *gdbarch)
670 struct remote_state *rs = get_remote_state_raw ();
671 struct remote_arch_state *rsa;
673 rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state);
675 /* Use the architecture to build a regnum<->pnum table, which will be
676 1:1 unless a feature set specifies otherwise. */
677 rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch,
678 gdbarch_num_regs (gdbarch),
681 /* Record the maximum possible size of the g packet - it may turn out
683 rsa->sizeof_g_packet = map_regcache_remote_table (gdbarch, rsa->regs);
685 /* Default maximum number of characters in a packet body. Many
686 remote stubs have a hardwired buffer size of 400 bytes
687 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
688 as the maximum packet-size to ensure that the packet and an extra
689 NUL character can always fit in the buffer. This stops GDB
690 trashing stubs that try to squeeze an extra NUL into what is
691 already a full buffer (As of 1999-12-04 that was most stubs). */
692 rsa->remote_packet_size = 400 - 1;
694 /* This one is filled in when a ``g'' packet is received. */
695 rsa->actual_register_packet_size = 0;
697 /* Should rsa->sizeof_g_packet needs more space than the
698 default, adjust the size accordingly. Remember that each byte is
699 encoded as two characters. 32 is the overhead for the packet
700 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
701 (``$NN:G...#NN'') is a better guess, the below has been padded a
703 if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2))
704 rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32);
706 /* Make sure that the packet buffer is plenty big enough for
707 this architecture. */
708 if (rs->buf_size < rsa->remote_packet_size)
710 rs->buf_size = 2 * rsa->remote_packet_size;
711 rs->buf = xrealloc (rs->buf, rs->buf_size);
717 /* Return the current allowed size of a remote packet. This is
718 inferred from the current architecture, and should be used to
719 limit the length of outgoing packets. */
721 get_remote_packet_size (void)
723 struct remote_state *rs = get_remote_state ();
724 struct remote_arch_state *rsa = get_remote_arch_state ();
726 if (rs->explicit_packet_size)
727 return rs->explicit_packet_size;
729 return rsa->remote_packet_size;
732 static struct packet_reg *
733 packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
735 if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch ()))
739 struct packet_reg *r = &rsa->regs[regnum];
741 gdb_assert (r->regnum == regnum);
746 static struct packet_reg *
747 packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
751 for (i = 0; i < gdbarch_num_regs (target_gdbarch ()); i++)
753 struct packet_reg *r = &rsa->regs[i];
761 static struct target_ops remote_ops;
763 static struct target_ops extended_remote_ops;
765 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
766 ``forever'' still use the normal timeout mechanism. This is
767 currently used by the ASYNC code to guarentee that target reads
768 during the initial connect always time-out. Once getpkt has been
769 modified to return a timeout indication and, in turn
770 remote_wait()/wait_for_inferior() have gained a timeout parameter
772 static int wait_forever_enabled_p = 1;
774 /* Allow the user to specify what sequence to send to the remote
775 when he requests a program interruption: Although ^C is usually
776 what remote systems expect (this is the default, here), it is
777 sometimes preferable to send a break. On other systems such
778 as the Linux kernel, a break followed by g, which is Magic SysRq g
779 is required in order to interrupt the execution. */
780 const char interrupt_sequence_control_c[] = "Ctrl-C";
781 const char interrupt_sequence_break[] = "BREAK";
782 const char interrupt_sequence_break_g[] = "BREAK-g";
783 static const char *const interrupt_sequence_modes[] =
785 interrupt_sequence_control_c,
786 interrupt_sequence_break,
787 interrupt_sequence_break_g,
790 static const char *interrupt_sequence_mode = interrupt_sequence_control_c;
793 show_interrupt_sequence (struct ui_file *file, int from_tty,
794 struct cmd_list_element *c,
797 if (interrupt_sequence_mode == interrupt_sequence_control_c)
798 fprintf_filtered (file,
799 _("Send the ASCII ETX character (Ctrl-c) "
800 "to the remote target to interrupt the "
801 "execution of the program.\n"));
802 else if (interrupt_sequence_mode == interrupt_sequence_break)
803 fprintf_filtered (file,
804 _("send a break signal to the remote target "
805 "to interrupt the execution of the program.\n"));
806 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
807 fprintf_filtered (file,
808 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
809 "the remote target to interrupt the execution "
810 "of Linux kernel.\n"));
812 internal_error (__FILE__, __LINE__,
813 _("Invalid value for interrupt_sequence_mode: %s."),
814 interrupt_sequence_mode);
817 /* This boolean variable specifies whether interrupt_sequence is sent
818 to the remote target when gdb connects to it.
819 This is mostly needed when you debug the Linux kernel: The Linux kernel
820 expects BREAK g which is Magic SysRq g for connecting gdb. */
821 static int interrupt_on_connect = 0;
823 /* This variable is used to implement the "set/show remotebreak" commands.
824 Since these commands are now deprecated in favor of "set/show remote
825 interrupt-sequence", it no longer has any effect on the code. */
826 static int remote_break;
829 set_remotebreak (char *args, int from_tty, struct cmd_list_element *c)
832 interrupt_sequence_mode = interrupt_sequence_break;
834 interrupt_sequence_mode = interrupt_sequence_control_c;
838 show_remotebreak (struct ui_file *file, int from_tty,
839 struct cmd_list_element *c,
844 /* This variable sets the number of bits in an address that are to be
845 sent in a memory ("M" or "m") packet. Normally, after stripping
846 leading zeros, the entire address would be sent. This variable
847 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
848 initial implementation of remote.c restricted the address sent in
849 memory packets to ``host::sizeof long'' bytes - (typically 32
850 bits). Consequently, for 64 bit targets, the upper 32 bits of an
851 address was never sent. Since fixing this bug may cause a break in
852 some remote targets this variable is principly provided to
853 facilitate backward compatibility. */
855 static unsigned int remote_address_size;
857 /* Temporary to track who currently owns the terminal. See
858 remote_terminal_* for more details. */
860 static int remote_async_terminal_ours_p;
862 /* The executable file to use for "run" on the remote side. */
864 static char *remote_exec_file = "";
867 /* User configurable variables for the number of characters in a
868 memory read/write packet. MIN (rsa->remote_packet_size,
869 rsa->sizeof_g_packet) is the default. Some targets need smaller
870 values (fifo overruns, et.al.) and some users need larger values
871 (speed up transfers). The variables ``preferred_*'' (the user
872 request), ``current_*'' (what was actually set) and ``forced_*''
873 (Positive - a soft limit, negative - a hard limit). */
875 struct memory_packet_config
882 /* Compute the current size of a read/write packet. Since this makes
883 use of ``actual_register_packet_size'' the computation is dynamic. */
886 get_memory_packet_size (struct memory_packet_config *config)
888 struct remote_state *rs = get_remote_state ();
889 struct remote_arch_state *rsa = get_remote_arch_state ();
891 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
892 law?) that some hosts don't cope very well with large alloca()
893 calls. Eventually the alloca() code will be replaced by calls to
894 xmalloc() and make_cleanups() allowing this restriction to either
895 be lifted or removed. */
896 #ifndef MAX_REMOTE_PACKET_SIZE
897 #define MAX_REMOTE_PACKET_SIZE 16384
899 /* NOTE: 20 ensures we can write at least one byte. */
900 #ifndef MIN_REMOTE_PACKET_SIZE
901 #define MIN_REMOTE_PACKET_SIZE 20
906 if (config->size <= 0)
907 what_they_get = MAX_REMOTE_PACKET_SIZE;
909 what_they_get = config->size;
913 what_they_get = get_remote_packet_size ();
914 /* Limit the packet to the size specified by the user. */
916 && what_they_get > config->size)
917 what_they_get = config->size;
919 /* Limit it to the size of the targets ``g'' response unless we have
920 permission from the stub to use a larger packet size. */
921 if (rs->explicit_packet_size == 0
922 && rsa->actual_register_packet_size > 0
923 && what_they_get > rsa->actual_register_packet_size)
924 what_they_get = rsa->actual_register_packet_size;
926 if (what_they_get > MAX_REMOTE_PACKET_SIZE)
927 what_they_get = MAX_REMOTE_PACKET_SIZE;
928 if (what_they_get < MIN_REMOTE_PACKET_SIZE)
929 what_they_get = MIN_REMOTE_PACKET_SIZE;
931 /* Make sure there is room in the global buffer for this packet
932 (including its trailing NUL byte). */
933 if (rs->buf_size < what_they_get + 1)
935 rs->buf_size = 2 * what_they_get;
936 rs->buf = xrealloc (rs->buf, 2 * what_they_get);
939 return what_they_get;
942 /* Update the size of a read/write packet. If they user wants
943 something really big then do a sanity check. */
946 set_memory_packet_size (char *args, struct memory_packet_config *config)
948 int fixed_p = config->fixed_p;
949 long size = config->size;
952 error (_("Argument required (integer, `fixed' or `limited')."));
953 else if (strcmp (args, "hard") == 0
954 || strcmp (args, "fixed") == 0)
956 else if (strcmp (args, "soft") == 0
957 || strcmp (args, "limit") == 0)
963 size = strtoul (args, &end, 0);
965 error (_("Invalid %s (bad syntax)."), config->name);
967 /* Instead of explicitly capping the size of a packet to
968 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
969 instead allowed to set the size to something arbitrarily
971 if (size > MAX_REMOTE_PACKET_SIZE)
972 error (_("Invalid %s (too large)."), config->name);
976 if (fixed_p && !config->fixed_p)
978 if (! query (_("The target may not be able to correctly handle a %s\n"
979 "of %ld bytes. Change the packet size? "),
981 error (_("Packet size not changed."));
983 /* Update the config. */
984 config->fixed_p = fixed_p;
989 show_memory_packet_size (struct memory_packet_config *config)
991 printf_filtered (_("The %s is %ld. "), config->name, config->size);
993 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
994 get_memory_packet_size (config));
996 printf_filtered (_("Packets are limited to %ld bytes.\n"),
997 get_memory_packet_size (config));
1000 static struct memory_packet_config memory_write_packet_config =
1002 "memory-write-packet-size",
1006 set_memory_write_packet_size (char *args, int from_tty)
1008 set_memory_packet_size (args, &memory_write_packet_config);
1012 show_memory_write_packet_size (char *args, int from_tty)
1014 show_memory_packet_size (&memory_write_packet_config);
1018 get_memory_write_packet_size (void)
1020 return get_memory_packet_size (&memory_write_packet_config);
1023 static struct memory_packet_config memory_read_packet_config =
1025 "memory-read-packet-size",
1029 set_memory_read_packet_size (char *args, int from_tty)
1031 set_memory_packet_size (args, &memory_read_packet_config);
1035 show_memory_read_packet_size (char *args, int from_tty)
1037 show_memory_packet_size (&memory_read_packet_config);
1041 get_memory_read_packet_size (void)
1043 long size = get_memory_packet_size (&memory_read_packet_config);
1045 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1046 extra buffer size argument before the memory read size can be
1047 increased beyond this. */
1048 if (size > get_remote_packet_size ())
1049 size = get_remote_packet_size ();
1054 /* Generic configuration support for packets the stub optionally
1055 supports. Allows the user to specify the use of the packet as well
1056 as allowing GDB to auto-detect support in the remote stub. */
1060 PACKET_SUPPORT_UNKNOWN = 0,
1065 struct packet_config
1070 /* If auto, GDB auto-detects support for this packet or feature,
1071 either through qSupported, or by trying the packet and looking
1072 at the response. If true, GDB assumes the target supports this
1073 packet. If false, the packet is disabled. Configs that don't
1074 have an associated command always have this set to auto. */
1075 enum auto_boolean detect;
1077 /* Does the target support this packet? */
1078 enum packet_support support;
1081 /* Analyze a packet's return value and update the packet config
1091 static enum packet_support packet_config_support (struct packet_config *config);
1092 static enum packet_support packet_support (int packet);
1095 show_packet_config_cmd (struct packet_config *config)
1097 char *support = "internal-error";
1099 switch (packet_config_support (config))
1102 support = "enabled";
1104 case PACKET_DISABLE:
1105 support = "disabled";
1107 case PACKET_SUPPORT_UNKNOWN:
1108 support = "unknown";
1111 switch (config->detect)
1113 case AUTO_BOOLEAN_AUTO:
1114 printf_filtered (_("Support for the `%s' packet "
1115 "is auto-detected, currently %s.\n"),
1116 config->name, support);
1118 case AUTO_BOOLEAN_TRUE:
1119 case AUTO_BOOLEAN_FALSE:
1120 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1121 config->name, support);
1127 add_packet_config_cmd (struct packet_config *config, const char *name,
1128 const char *title, int legacy)
1134 config->name = name;
1135 config->title = title;
1136 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1138 show_doc = xstrprintf ("Show current use of remote "
1139 "protocol `%s' (%s) packet",
1141 /* set/show TITLE-packet {auto,on,off} */
1142 cmd_name = xstrprintf ("%s-packet", title);
1143 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
1144 &config->detect, set_doc,
1145 show_doc, NULL, /* help_doc */
1147 show_remote_protocol_packet_cmd,
1148 &remote_set_cmdlist, &remote_show_cmdlist);
1149 /* The command code copies the documentation strings. */
1152 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1157 legacy_name = xstrprintf ("%s-packet", name);
1158 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1159 &remote_set_cmdlist);
1160 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1161 &remote_show_cmdlist);
1165 static enum packet_result
1166 packet_check_result (const char *buf)
1170 /* The stub recognized the packet request. Check that the
1171 operation succeeded. */
1173 && isxdigit (buf[1]) && isxdigit (buf[2])
1175 /* "Enn" - definitly an error. */
1176 return PACKET_ERROR;
1178 /* Always treat "E." as an error. This will be used for
1179 more verbose error messages, such as E.memtypes. */
1180 if (buf[0] == 'E' && buf[1] == '.')
1181 return PACKET_ERROR;
1183 /* The packet may or may not be OK. Just assume it is. */
1187 /* The stub does not support the packet. */
1188 return PACKET_UNKNOWN;
1191 static enum packet_result
1192 packet_ok (const char *buf, struct packet_config *config)
1194 enum packet_result result;
1196 if (config->detect != AUTO_BOOLEAN_TRUE
1197 && config->support == PACKET_DISABLE)
1198 internal_error (__FILE__, __LINE__,
1199 _("packet_ok: attempt to use a disabled packet"));
1201 result = packet_check_result (buf);
1206 /* The stub recognized the packet request. */
1207 if (config->support == PACKET_SUPPORT_UNKNOWN)
1210 fprintf_unfiltered (gdb_stdlog,
1211 "Packet %s (%s) is supported\n",
1212 config->name, config->title);
1213 config->support = PACKET_ENABLE;
1216 case PACKET_UNKNOWN:
1217 /* The stub does not support the packet. */
1218 if (config->detect == AUTO_BOOLEAN_AUTO
1219 && config->support == PACKET_ENABLE)
1221 /* If the stub previously indicated that the packet was
1222 supported then there is a protocol error. */
1223 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1224 config->name, config->title);
1226 else if (config->detect == AUTO_BOOLEAN_TRUE)
1228 /* The user set it wrong. */
1229 error (_("Enabled packet %s (%s) not recognized by stub"),
1230 config->name, config->title);
1234 fprintf_unfiltered (gdb_stdlog,
1235 "Packet %s (%s) is NOT supported\n",
1236 config->name, config->title);
1237 config->support = PACKET_DISABLE;
1257 PACKET_vFile_pwrite,
1259 PACKET_vFile_unlink,
1260 PACKET_vFile_readlink,
1262 PACKET_qXfer_features,
1263 PACKET_qXfer_libraries,
1264 PACKET_qXfer_libraries_svr4,
1265 PACKET_qXfer_memory_map,
1266 PACKET_qXfer_spu_read,
1267 PACKET_qXfer_spu_write,
1268 PACKET_qXfer_osdata,
1269 PACKET_qXfer_threads,
1270 PACKET_qXfer_statictrace_read,
1271 PACKET_qXfer_traceframe_info,
1277 PACKET_QPassSignals,
1278 PACKET_QProgramSignals,
1280 PACKET_qSearch_memory,
1283 PACKET_QStartNoAckMode,
1285 PACKET_qXfer_siginfo_read,
1286 PACKET_qXfer_siginfo_write,
1289 /* Support for conditional tracepoints. */
1290 PACKET_ConditionalTracepoints,
1292 /* Support for target-side breakpoint conditions. */
1293 PACKET_ConditionalBreakpoints,
1295 /* Support for target-side breakpoint commands. */
1296 PACKET_BreakpointCommands,
1298 /* Support for fast tracepoints. */
1299 PACKET_FastTracepoints,
1301 /* Support for static tracepoints. */
1302 PACKET_StaticTracepoints,
1304 /* Support for installing tracepoints while a trace experiment is
1306 PACKET_InstallInTrace,
1310 PACKET_TracepointSource,
1313 PACKET_QDisableRandomization,
1315 PACKET_QTBuffer_size,
1318 PACKET_qXfer_btrace,
1320 /* Support for the QNonStop packet. */
1323 /* Support for multi-process extensions. */
1324 PACKET_multiprocess_feature,
1326 /* Support for enabling and disabling tracepoints while a trace
1327 experiment is running. */
1328 PACKET_EnableDisableTracepoints_feature,
1330 /* Support for collecting strings using the tracenz bytecode. */
1331 PACKET_tracenz_feature,
1333 /* Support for continuing to run a trace experiment while GDB is
1335 PACKET_DisconnectedTracing_feature,
1337 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1338 PACKET_augmented_libraries_svr4_read_feature,
1340 /* Support for the qXfer:btrace-conf:read packet. */
1341 PACKET_qXfer_btrace_conf,
1343 /* Support for the Qbtrace-conf:bts:size packet. */
1344 PACKET_Qbtrace_conf_bts_size,
1346 /* Support for swbreak+ feature. */
1347 PACKET_swbreak_feature,
1349 /* Support for hwbreak+ feature. */
1350 PACKET_hwbreak_feature,
1355 static struct packet_config remote_protocol_packets[PACKET_MAX];
1357 /* Returns the packet's corresponding "set remote foo-packet" command
1358 state. See struct packet_config for more details. */
1360 static enum auto_boolean
1361 packet_set_cmd_state (int packet)
1363 return remote_protocol_packets[packet].detect;
1366 /* Returns whether a given packet or feature is supported. This takes
1367 into account the state of the corresponding "set remote foo-packet"
1368 command, which may be used to bypass auto-detection. */
1370 static enum packet_support
1371 packet_config_support (struct packet_config *config)
1373 switch (config->detect)
1375 case AUTO_BOOLEAN_TRUE:
1376 return PACKET_ENABLE;
1377 case AUTO_BOOLEAN_FALSE:
1378 return PACKET_DISABLE;
1379 case AUTO_BOOLEAN_AUTO:
1380 return config->support;
1382 gdb_assert_not_reached (_("bad switch"));
1386 /* Same as packet_config_support, but takes the packet's enum value as
1389 static enum packet_support
1390 packet_support (int packet)
1392 struct packet_config *config = &remote_protocol_packets[packet];
1394 return packet_config_support (config);
1398 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
1399 struct cmd_list_element *c,
1402 struct packet_config *packet;
1404 for (packet = remote_protocol_packets;
1405 packet < &remote_protocol_packets[PACKET_MAX];
1408 if (&packet->detect == c->var)
1410 show_packet_config_cmd (packet);
1414 internal_error (__FILE__, __LINE__, _("Could not find config for %s"),
1418 /* Should we try one of the 'Z' requests? */
1422 Z_PACKET_SOFTWARE_BP,
1423 Z_PACKET_HARDWARE_BP,
1430 /* For compatibility with older distributions. Provide a ``set remote
1431 Z-packet ...'' command that updates all the Z packet types. */
1433 static enum auto_boolean remote_Z_packet_detect;
1436 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
1437 struct cmd_list_element *c)
1441 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1442 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
1446 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
1447 struct cmd_list_element *c,
1452 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1454 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
1458 /* Returns true if the multi-process extensions are in effect. */
1461 remote_multi_process_p (struct remote_state *rs)
1463 return packet_support (PACKET_multiprocess_feature) == PACKET_ENABLE;
1466 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1467 static struct async_signal_handler *async_sigint_remote_twice_token;
1468 static struct async_signal_handler *async_sigint_remote_token;
1471 /* Asynchronous signal handle registered as event loop source for
1472 when we have pending events ready to be passed to the core. */
1474 static struct async_event_handler *remote_async_inferior_event_token;
1478 static ptid_t magic_null_ptid;
1479 static ptid_t not_sent_ptid;
1480 static ptid_t any_thread_ptid;
1482 /* Find out if the stub attached to PID (and hence GDB should offer to
1483 detach instead of killing it when bailing out). */
1486 remote_query_attached (int pid)
1488 struct remote_state *rs = get_remote_state ();
1489 size_t size = get_remote_packet_size ();
1491 if (packet_support (PACKET_qAttached) == PACKET_DISABLE)
1494 if (remote_multi_process_p (rs))
1495 xsnprintf (rs->buf, size, "qAttached:%x", pid);
1497 xsnprintf (rs->buf, size, "qAttached");
1500 getpkt (&rs->buf, &rs->buf_size, 0);
1502 switch (packet_ok (rs->buf,
1503 &remote_protocol_packets[PACKET_qAttached]))
1506 if (strcmp (rs->buf, "1") == 0)
1510 warning (_("Remote failure reply: %s"), rs->buf);
1512 case PACKET_UNKNOWN:
1519 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1520 has been invented by GDB, instead of reported by the target. Since
1521 we can be connected to a remote system before before knowing about
1522 any inferior, mark the target with execution when we find the first
1523 inferior. If ATTACHED is 1, then we had just attached to this
1524 inferior. If it is 0, then we just created this inferior. If it
1525 is -1, then try querying the remote stub to find out if it had
1526 attached to the inferior or not. */
1528 static struct inferior *
1529 remote_add_inferior (int fake_pid_p, int pid, int attached)
1531 struct inferior *inf;
1533 /* Check whether this process we're learning about is to be
1534 considered attached, or if is to be considered to have been
1535 spawned by the stub. */
1537 attached = remote_query_attached (pid);
1539 if (gdbarch_has_global_solist (target_gdbarch ()))
1541 /* If the target shares code across all inferiors, then every
1542 attach adds a new inferior. */
1543 inf = add_inferior (pid);
1545 /* ... and every inferior is bound to the same program space.
1546 However, each inferior may still have its own address
1548 inf->aspace = maybe_new_address_space ();
1549 inf->pspace = current_program_space;
1553 /* In the traditional debugging scenario, there's a 1-1 match
1554 between program/address spaces. We simply bind the inferior
1555 to the program space's address space. */
1556 inf = current_inferior ();
1557 inferior_appeared (inf, pid);
1560 inf->attach_flag = attached;
1561 inf->fake_pid_p = fake_pid_p;
1566 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1567 according to RUNNING. */
1570 remote_add_thread (ptid_t ptid, int running)
1572 struct remote_state *rs = get_remote_state ();
1574 /* GDB historically didn't pull threads in the initial connection
1575 setup. If the remote target doesn't even have a concept of
1576 threads (e.g., a bare-metal target), even if internally we
1577 consider that a single-threaded target, mentioning a new thread
1578 might be confusing to the user. Be silent then, preserving the
1579 age old behavior. */
1580 if (rs->starting_up)
1581 add_thread_silent (ptid);
1585 set_executing (ptid, running);
1586 set_running (ptid, running);
1589 /* Come here when we learn about a thread id from the remote target.
1590 It may be the first time we hear about such thread, so take the
1591 opportunity to add it to GDB's thread list. In case this is the
1592 first time we're noticing its corresponding inferior, add it to
1593 GDB's inferior list as well. */
1596 remote_notice_new_inferior (ptid_t currthread, int running)
1598 /* If this is a new thread, add it to GDB's thread list.
1599 If we leave it up to WFI to do this, bad things will happen. */
1601 if (in_thread_list (currthread) && is_exited (currthread))
1603 /* We're seeing an event on a thread id we knew had exited.
1604 This has to be a new thread reusing the old id. Add it. */
1605 remote_add_thread (currthread, running);
1609 if (!in_thread_list (currthread))
1611 struct inferior *inf = NULL;
1612 int pid = ptid_get_pid (currthread);
1614 if (ptid_is_pid (inferior_ptid)
1615 && pid == ptid_get_pid (inferior_ptid))
1617 /* inferior_ptid has no thread member yet. This can happen
1618 with the vAttach -> remote_wait,"TAAthread:" path if the
1619 stub doesn't support qC. This is the first stop reported
1620 after an attach, so this is the main thread. Update the
1621 ptid in the thread list. */
1622 if (in_thread_list (pid_to_ptid (pid)))
1623 thread_change_ptid (inferior_ptid, currthread);
1626 remote_add_thread (currthread, running);
1627 inferior_ptid = currthread;
1632 if (ptid_equal (magic_null_ptid, inferior_ptid))
1634 /* inferior_ptid is not set yet. This can happen with the
1635 vRun -> remote_wait,"TAAthread:" path if the stub
1636 doesn't support qC. This is the first stop reported
1637 after an attach, so this is the main thread. Update the
1638 ptid in the thread list. */
1639 thread_change_ptid (inferior_ptid, currthread);
1643 /* When connecting to a target remote, or to a target
1644 extended-remote which already was debugging an inferior, we
1645 may not know about it yet. Add it before adding its child
1646 thread, so notifications are emitted in a sensible order. */
1647 if (!in_inferior_list (ptid_get_pid (currthread)))
1649 struct remote_state *rs = get_remote_state ();
1650 int fake_pid_p = !remote_multi_process_p (rs);
1652 inf = remote_add_inferior (fake_pid_p,
1653 ptid_get_pid (currthread), -1);
1656 /* This is really a new thread. Add it. */
1657 remote_add_thread (currthread, running);
1659 /* If we found a new inferior, let the common code do whatever
1660 it needs to with it (e.g., read shared libraries, insert
1661 breakpoints), unless we're just setting up an all-stop
1665 struct remote_state *rs = get_remote_state ();
1667 if (non_stop || !rs->starting_up)
1668 notice_new_inferior (currthread, running, 0);
1673 /* Return the private thread data, creating it if necessary. */
1675 static struct private_thread_info *
1676 demand_private_info (ptid_t ptid)
1678 struct thread_info *info = find_thread_ptid (ptid);
1684 info->priv = xmalloc (sizeof (*(info->priv)));
1685 info->private_dtor = free_private_thread_info;
1686 info->priv->core = -1;
1687 info->priv->extra = 0;
1693 /* Call this function as a result of
1694 1) A halt indication (T packet) containing a thread id
1695 2) A direct query of currthread
1696 3) Successful execution of set thread */
1699 record_currthread (struct remote_state *rs, ptid_t currthread)
1701 rs->general_thread = currthread;
1704 /* If 'QPassSignals' is supported, tell the remote stub what signals
1705 it can simply pass through to the inferior without reporting. */
1708 remote_pass_signals (struct target_ops *self,
1709 int numsigs, unsigned char *pass_signals)
1711 if (packet_support (PACKET_QPassSignals) != PACKET_DISABLE)
1713 char *pass_packet, *p;
1715 struct remote_state *rs = get_remote_state ();
1717 gdb_assert (numsigs < 256);
1718 for (i = 0; i < numsigs; i++)
1720 if (pass_signals[i])
1723 pass_packet = xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
1724 strcpy (pass_packet, "QPassSignals:");
1725 p = pass_packet + strlen (pass_packet);
1726 for (i = 0; i < numsigs; i++)
1728 if (pass_signals[i])
1731 *p++ = tohex (i >> 4);
1732 *p++ = tohex (i & 15);
1741 if (!rs->last_pass_packet || strcmp (rs->last_pass_packet, pass_packet))
1743 putpkt (pass_packet);
1744 getpkt (&rs->buf, &rs->buf_size, 0);
1745 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QPassSignals]);
1746 if (rs->last_pass_packet)
1747 xfree (rs->last_pass_packet);
1748 rs->last_pass_packet = pass_packet;
1751 xfree (pass_packet);
1755 /* If 'QProgramSignals' is supported, tell the remote stub what
1756 signals it should pass through to the inferior when detaching. */
1759 remote_program_signals (struct target_ops *self,
1760 int numsigs, unsigned char *signals)
1762 if (packet_support (PACKET_QProgramSignals) != PACKET_DISABLE)
1766 struct remote_state *rs = get_remote_state ();
1768 gdb_assert (numsigs < 256);
1769 for (i = 0; i < numsigs; i++)
1774 packet = xmalloc (count * 3 + strlen ("QProgramSignals:") + 1);
1775 strcpy (packet, "QProgramSignals:");
1776 p = packet + strlen (packet);
1777 for (i = 0; i < numsigs; i++)
1779 if (signal_pass_state (i))
1782 *p++ = tohex (i >> 4);
1783 *p++ = tohex (i & 15);
1792 if (!rs->last_program_signals_packet
1793 || strcmp (rs->last_program_signals_packet, packet) != 0)
1796 getpkt (&rs->buf, &rs->buf_size, 0);
1797 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QProgramSignals]);
1798 xfree (rs->last_program_signals_packet);
1799 rs->last_program_signals_packet = packet;
1806 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1807 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1808 thread. If GEN is set, set the general thread, if not, then set
1809 the step/continue thread. */
1811 set_thread (struct ptid ptid, int gen)
1813 struct remote_state *rs = get_remote_state ();
1814 ptid_t state = gen ? rs->general_thread : rs->continue_thread;
1815 char *buf = rs->buf;
1816 char *endbuf = rs->buf + get_remote_packet_size ();
1818 if (ptid_equal (state, ptid))
1822 *buf++ = gen ? 'g' : 'c';
1823 if (ptid_equal (ptid, magic_null_ptid))
1824 xsnprintf (buf, endbuf - buf, "0");
1825 else if (ptid_equal (ptid, any_thread_ptid))
1826 xsnprintf (buf, endbuf - buf, "0");
1827 else if (ptid_equal (ptid, minus_one_ptid))
1828 xsnprintf (buf, endbuf - buf, "-1");
1830 write_ptid (buf, endbuf, ptid);
1832 getpkt (&rs->buf, &rs->buf_size, 0);
1834 rs->general_thread = ptid;
1836 rs->continue_thread = ptid;
1840 set_general_thread (struct ptid ptid)
1842 set_thread (ptid, 1);
1846 set_continue_thread (struct ptid ptid)
1848 set_thread (ptid, 0);
1851 /* Change the remote current process. Which thread within the process
1852 ends up selected isn't important, as long as it is the same process
1853 as what INFERIOR_PTID points to.
1855 This comes from that fact that there is no explicit notion of
1856 "selected process" in the protocol. The selected process for
1857 general operations is the process the selected general thread
1861 set_general_process (void)
1863 struct remote_state *rs = get_remote_state ();
1865 /* If the remote can't handle multiple processes, don't bother. */
1866 if (!rs->extended || !remote_multi_process_p (rs))
1869 /* We only need to change the remote current thread if it's pointing
1870 at some other process. */
1871 if (ptid_get_pid (rs->general_thread) != ptid_get_pid (inferior_ptid))
1872 set_general_thread (inferior_ptid);
1876 /* Return nonzero if this is the main thread that we made up ourselves
1877 to model non-threaded targets as single-threaded. */
1880 remote_thread_always_alive (struct target_ops *ops, ptid_t ptid)
1882 struct remote_state *rs = get_remote_state ();
1885 if (ptid_equal (ptid, magic_null_ptid))
1886 /* The main thread is always alive. */
1889 if (ptid_get_pid (ptid) != 0 && ptid_get_lwp (ptid) == 0)
1890 /* The main thread is always alive. This can happen after a
1891 vAttach, if the remote side doesn't support
1898 /* Return nonzero if the thread PTID is still alive on the remote
1902 remote_thread_alive (struct target_ops *ops, ptid_t ptid)
1904 struct remote_state *rs = get_remote_state ();
1907 /* Check if this is a thread that we made up ourselves to model
1908 non-threaded targets as single-threaded. */
1909 if (remote_thread_always_alive (ops, ptid))
1913 endp = rs->buf + get_remote_packet_size ();
1916 write_ptid (p, endp, ptid);
1919 getpkt (&rs->buf, &rs->buf_size, 0);
1920 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
1923 /* About these extended threadlist and threadinfo packets. They are
1924 variable length packets but, the fields within them are often fixed
1925 length. They are redundent enough to send over UDP as is the
1926 remote protocol in general. There is a matching unit test module
1929 /* WARNING: This threadref data structure comes from the remote O.S.,
1930 libstub protocol encoding, and remote.c. It is not particularly
1933 /* Right now, the internal structure is int. We want it to be bigger.
1934 Plan to fix this. */
1936 typedef int gdb_threadref; /* Internal GDB thread reference. */
1938 /* gdb_ext_thread_info is an internal GDB data structure which is
1939 equivalent to the reply of the remote threadinfo packet. */
1941 struct gdb_ext_thread_info
1943 threadref threadid; /* External form of thread reference. */
1944 int active; /* Has state interesting to GDB?
1946 char display[256]; /* Brief state display, name,
1947 blocked/suspended. */
1948 char shortname[32]; /* To be used to name threads. */
1949 char more_display[256]; /* Long info, statistics, queue depth,
1953 /* The volume of remote transfers can be limited by submitting
1954 a mask containing bits specifying the desired information.
1955 Use a union of these values as the 'selection' parameter to
1956 get_thread_info. FIXME: Make these TAG names more thread specific. */
1958 #define TAG_THREADID 1
1959 #define TAG_EXISTS 2
1960 #define TAG_DISPLAY 4
1961 #define TAG_THREADNAME 8
1962 #define TAG_MOREDISPLAY 16
1964 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1966 static char *unpack_nibble (char *buf, int *val);
1968 static char *unpack_byte (char *buf, int *value);
1970 static char *pack_int (char *buf, int value);
1972 static char *unpack_int (char *buf, int *value);
1974 static char *unpack_string (char *src, char *dest, int length);
1976 static char *pack_threadid (char *pkt, threadref *id);
1978 static char *unpack_threadid (char *inbuf, threadref *id);
1980 void int_to_threadref (threadref *id, int value);
1982 static int threadref_to_int (threadref *ref);
1984 static void copy_threadref (threadref *dest, threadref *src);
1986 static int threadmatch (threadref *dest, threadref *src);
1988 static char *pack_threadinfo_request (char *pkt, int mode,
1991 static int remote_unpack_thread_info_response (char *pkt,
1992 threadref *expectedref,
1993 struct gdb_ext_thread_info
1997 static int remote_get_threadinfo (threadref *threadid,
1998 int fieldset, /*TAG mask */
1999 struct gdb_ext_thread_info *info);
2001 static char *pack_threadlist_request (char *pkt, int startflag,
2003 threadref *nextthread);
2005 static int parse_threadlist_response (char *pkt,
2007 threadref *original_echo,
2008 threadref *resultlist,
2011 static int remote_get_threadlist (int startflag,
2012 threadref *nextthread,
2016 threadref *threadlist);
2018 typedef int (*rmt_thread_action) (threadref *ref, void *context);
2020 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
2021 void *context, int looplimit);
2023 static int remote_newthread_step (threadref *ref, void *context);
2026 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2027 buffer we're allowed to write to. Returns
2028 BUF+CHARACTERS_WRITTEN. */
2031 write_ptid (char *buf, const char *endbuf, ptid_t ptid)
2034 struct remote_state *rs = get_remote_state ();
2036 if (remote_multi_process_p (rs))
2038 pid = ptid_get_pid (ptid);
2040 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
2042 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
2044 tid = ptid_get_lwp (ptid);
2046 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
2048 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
2053 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
2054 passed the last parsed char. Returns null_ptid on error. */
2057 read_ptid (char *buf, char **obuf)
2061 ULONGEST pid = 0, tid = 0;
2065 /* Multi-process ptid. */
2066 pp = unpack_varlen_hex (p + 1, &pid);
2068 error (_("invalid remote ptid: %s"), p);
2071 pp = unpack_varlen_hex (p + 1, &tid);
2074 return ptid_build (pid, tid, 0);
2077 /* No multi-process. Just a tid. */
2078 pp = unpack_varlen_hex (p, &tid);
2080 /* Since the stub is not sending a process id, then default to
2081 what's in inferior_ptid, unless it's null at this point. If so,
2082 then since there's no way to know the pid of the reported
2083 threads, use the magic number. */
2084 if (ptid_equal (inferior_ptid, null_ptid))
2085 pid = ptid_get_pid (magic_null_ptid);
2087 pid = ptid_get_pid (inferior_ptid);
2091 return ptid_build (pid, tid, 0);
2097 if (ch >= 'a' && ch <= 'f')
2098 return ch - 'a' + 10;
2099 if (ch >= '0' && ch <= '9')
2101 if (ch >= 'A' && ch <= 'F')
2102 return ch - 'A' + 10;
2107 stub_unpack_int (char *buff, int fieldlength)
2114 nibble = stubhex (*buff++);
2118 retval = retval << 4;
2124 unpack_nibble (char *buf, int *val)
2126 *val = fromhex (*buf++);
2131 unpack_byte (char *buf, int *value)
2133 *value = stub_unpack_int (buf, 2);
2138 pack_int (char *buf, int value)
2140 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
2141 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
2142 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
2143 buf = pack_hex_byte (buf, (value & 0xff));
2148 unpack_int (char *buf, int *value)
2150 *value = stub_unpack_int (buf, 8);
2154 #if 0 /* Currently unused, uncomment when needed. */
2155 static char *pack_string (char *pkt, char *string);
2158 pack_string (char *pkt, char *string)
2163 len = strlen (string);
2165 len = 200; /* Bigger than most GDB packets, junk??? */
2166 pkt = pack_hex_byte (pkt, len);
2170 if ((ch == '\0') || (ch == '#'))
2171 ch = '*'; /* Protect encapsulation. */
2176 #endif /* 0 (unused) */
2179 unpack_string (char *src, char *dest, int length)
2188 pack_threadid (char *pkt, threadref *id)
2191 unsigned char *altid;
2193 altid = (unsigned char *) id;
2194 limit = pkt + BUF_THREAD_ID_SIZE;
2196 pkt = pack_hex_byte (pkt, *altid++);
2202 unpack_threadid (char *inbuf, threadref *id)
2205 char *limit = inbuf + BUF_THREAD_ID_SIZE;
2208 altref = (char *) id;
2210 while (inbuf < limit)
2212 x = stubhex (*inbuf++);
2213 y = stubhex (*inbuf++);
2214 *altref++ = (x << 4) | y;
2219 /* Externally, threadrefs are 64 bits but internally, they are still
2220 ints. This is due to a mismatch of specifications. We would like
2221 to use 64bit thread references internally. This is an adapter
2225 int_to_threadref (threadref *id, int value)
2227 unsigned char *scan;
2229 scan = (unsigned char *) id;
2235 *scan++ = (value >> 24) & 0xff;
2236 *scan++ = (value >> 16) & 0xff;
2237 *scan++ = (value >> 8) & 0xff;
2238 *scan++ = (value & 0xff);
2242 threadref_to_int (threadref *ref)
2245 unsigned char *scan;
2251 value = (value << 8) | ((*scan++) & 0xff);
2256 copy_threadref (threadref *dest, threadref *src)
2259 unsigned char *csrc, *cdest;
2261 csrc = (unsigned char *) src;
2262 cdest = (unsigned char *) dest;
2269 threadmatch (threadref *dest, threadref *src)
2271 /* Things are broken right now, so just assume we got a match. */
2273 unsigned char *srcp, *destp;
2275 srcp = (char *) src;
2276 destp = (char *) dest;
2280 result &= (*srcp++ == *destp++) ? 1 : 0;
2287 threadid:1, # always request threadid
2294 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2297 pack_threadinfo_request (char *pkt, int mode, threadref *id)
2299 *pkt++ = 'q'; /* Info Query */
2300 *pkt++ = 'P'; /* process or thread info */
2301 pkt = pack_int (pkt, mode); /* mode */
2302 pkt = pack_threadid (pkt, id); /* threadid */
2303 *pkt = '\0'; /* terminate */
2307 /* These values tag the fields in a thread info response packet. */
2308 /* Tagging the fields allows us to request specific fields and to
2309 add more fields as time goes by. */
2311 #define TAG_THREADID 1 /* Echo the thread identifier. */
2312 #define TAG_EXISTS 2 /* Is this process defined enough to
2313 fetch registers and its stack? */
2314 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2315 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2316 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2320 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
2321 struct gdb_ext_thread_info *info)
2323 struct remote_state *rs = get_remote_state ();
2327 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
2330 /* info->threadid = 0; FIXME: implement zero_threadref. */
2332 info->display[0] = '\0';
2333 info->shortname[0] = '\0';
2334 info->more_display[0] = '\0';
2336 /* Assume the characters indicating the packet type have been
2338 pkt = unpack_int (pkt, &mask); /* arg mask */
2339 pkt = unpack_threadid (pkt, &ref);
2342 warning (_("Incomplete response to threadinfo request."));
2343 if (!threadmatch (&ref, expectedref))
2344 { /* This is an answer to a different request. */
2345 warning (_("ERROR RMT Thread info mismatch."));
2348 copy_threadref (&info->threadid, &ref);
2350 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2352 /* Packets are terminated with nulls. */
2353 while ((pkt < limit) && mask && *pkt)
2355 pkt = unpack_int (pkt, &tag); /* tag */
2356 pkt = unpack_byte (pkt, &length); /* length */
2357 if (!(tag & mask)) /* Tags out of synch with mask. */
2359 warning (_("ERROR RMT: threadinfo tag mismatch."));
2363 if (tag == TAG_THREADID)
2367 warning (_("ERROR RMT: length of threadid is not 16."));
2371 pkt = unpack_threadid (pkt, &ref);
2372 mask = mask & ~TAG_THREADID;
2375 if (tag == TAG_EXISTS)
2377 info->active = stub_unpack_int (pkt, length);
2379 mask = mask & ~(TAG_EXISTS);
2382 warning (_("ERROR RMT: 'exists' length too long."));
2388 if (tag == TAG_THREADNAME)
2390 pkt = unpack_string (pkt, &info->shortname[0], length);
2391 mask = mask & ~TAG_THREADNAME;
2394 if (tag == TAG_DISPLAY)
2396 pkt = unpack_string (pkt, &info->display[0], length);
2397 mask = mask & ~TAG_DISPLAY;
2400 if (tag == TAG_MOREDISPLAY)
2402 pkt = unpack_string (pkt, &info->more_display[0], length);
2403 mask = mask & ~TAG_MOREDISPLAY;
2406 warning (_("ERROR RMT: unknown thread info tag."));
2407 break; /* Not a tag we know about. */
2413 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
2414 struct gdb_ext_thread_info *info)
2416 struct remote_state *rs = get_remote_state ();
2419 pack_threadinfo_request (rs->buf, fieldset, threadid);
2421 getpkt (&rs->buf, &rs->buf_size, 0);
2423 if (rs->buf[0] == '\0')
2426 result = remote_unpack_thread_info_response (rs->buf + 2,
2431 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2434 pack_threadlist_request (char *pkt, int startflag, int threadcount,
2435 threadref *nextthread)
2437 *pkt++ = 'q'; /* info query packet */
2438 *pkt++ = 'L'; /* Process LIST or threadLIST request */
2439 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
2440 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
2441 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
2446 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2449 parse_threadlist_response (char *pkt, int result_limit,
2450 threadref *original_echo, threadref *resultlist,
2453 struct remote_state *rs = get_remote_state ();
2455 int count, resultcount, done;
2458 /* Assume the 'q' and 'M chars have been stripped. */
2459 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
2460 /* done parse past here */
2461 pkt = unpack_byte (pkt, &count); /* count field */
2462 pkt = unpack_nibble (pkt, &done);
2463 /* The first threadid is the argument threadid. */
2464 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
2465 while ((count-- > 0) && (pkt < limit))
2467 pkt = unpack_threadid (pkt, resultlist++);
2468 if (resultcount++ >= result_limit)
2476 /* Fetch the next batch of threads from the remote. Returns -1 if the
2477 qL packet is not supported, 0 on error and 1 on success. */
2480 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
2481 int *done, int *result_count, threadref *threadlist)
2483 struct remote_state *rs = get_remote_state ();
2486 /* Trancate result limit to be smaller than the packet size. */
2487 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10)
2488 >= get_remote_packet_size ())
2489 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
2491 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
2493 getpkt (&rs->buf, &rs->buf_size, 0);
2494 if (*rs->buf == '\0')
2496 /* Packet not supported. */
2501 parse_threadlist_response (rs->buf + 2, result_limit,
2502 &rs->echo_nextthread, threadlist, done);
2504 if (!threadmatch (&rs->echo_nextthread, nextthread))
2506 /* FIXME: This is a good reason to drop the packet. */
2507 /* Possably, there is a duplicate response. */
2509 retransmit immediatly - race conditions
2510 retransmit after timeout - yes
2512 wait for packet, then exit
2514 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2515 return 0; /* I choose simply exiting. */
2517 if (*result_count <= 0)
2521 warning (_("RMT ERROR : failed to get remote thread list."));
2524 return result; /* break; */
2526 if (*result_count > result_limit)
2529 warning (_("RMT ERROR: threadlist response longer than requested."));
2535 /* Fetch the list of remote threads, with the qL packet, and call
2536 STEPFUNCTION for each thread found. Stops iterating and returns 1
2537 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2538 STEPFUNCTION returns false. If the packet is not supported,
2542 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
2545 struct remote_state *rs = get_remote_state ();
2546 int done, i, result_count;
2554 if (loopcount++ > looplimit)
2557 warning (_("Remote fetch threadlist -infinite loop-."));
2560 result = remote_get_threadlist (startflag, &rs->nextthread,
2561 MAXTHREADLISTRESULTS,
2562 &done, &result_count,
2563 rs->resultthreadlist);
2566 /* Clear for later iterations. */
2568 /* Setup to resume next batch of thread references, set nextthread. */
2569 if (result_count >= 1)
2570 copy_threadref (&rs->nextthread,
2571 &rs->resultthreadlist[result_count - 1]);
2573 while (result_count--)
2575 if (!(*stepfunction) (&rs->resultthreadlist[i++], context))
2585 /* A thread found on the remote target. */
2587 typedef struct thread_item
2589 /* The thread's PTID. */
2592 /* The thread's extra info. May be NULL. */
2595 /* The core the thread was running on. -1 if not known. */
2598 DEF_VEC_O(thread_item_t);
2600 /* Context passed around to the various methods listing remote
2601 threads. As new threads are found, they're added to the ITEMS
2604 struct threads_listing_context
2606 /* The threads found on the remote target. */
2607 VEC (thread_item_t) *items;
2610 /* Discard the contents of the constructed thread listing context. */
2613 clear_threads_listing_context (void *p)
2615 struct threads_listing_context *context = p;
2617 struct thread_item *item;
2619 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
2620 xfree (item->extra);
2622 VEC_free (thread_item_t, context->items);
2626 remote_newthread_step (threadref *ref, void *data)
2628 struct threads_listing_context *context = data;
2629 struct thread_item item;
2630 int pid = ptid_get_pid (inferior_ptid);
2632 item.ptid = ptid_build (pid, threadref_to_int (ref), 0);
2636 VEC_safe_push (thread_item_t, context->items, &item);
2638 return 1; /* continue iterator */
2641 #define CRAZY_MAX_THREADS 1000
2644 remote_current_thread (ptid_t oldpid)
2646 struct remote_state *rs = get_remote_state ();
2649 getpkt (&rs->buf, &rs->buf_size, 0);
2650 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
2651 return read_ptid (&rs->buf[2], NULL);
2656 /* List remote threads using the deprecated qL packet. */
2659 remote_get_threads_with_ql (struct target_ops *ops,
2660 struct threads_listing_context *context)
2662 if (remote_threadlist_iterator (remote_newthread_step, context,
2663 CRAZY_MAX_THREADS) >= 0)
2669 #if defined(HAVE_LIBEXPAT)
2672 start_thread (struct gdb_xml_parser *parser,
2673 const struct gdb_xml_element *element,
2674 void *user_data, VEC(gdb_xml_value_s) *attributes)
2676 struct threads_listing_context *data = user_data;
2678 struct thread_item item;
2680 struct gdb_xml_value *attr;
2682 id = xml_find_attribute (attributes, "id")->value;
2683 item.ptid = read_ptid (id, NULL);
2685 attr = xml_find_attribute (attributes, "core");
2687 item.core = *(ULONGEST *) attr->value;
2693 VEC_safe_push (thread_item_t, data->items, &item);
2697 end_thread (struct gdb_xml_parser *parser,
2698 const struct gdb_xml_element *element,
2699 void *user_data, const char *body_text)
2701 struct threads_listing_context *data = user_data;
2703 if (body_text && *body_text)
2704 VEC_last (thread_item_t, data->items)->extra = xstrdup (body_text);
2707 const struct gdb_xml_attribute thread_attributes[] = {
2708 { "id", GDB_XML_AF_NONE, NULL, NULL },
2709 { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
2710 { NULL, GDB_XML_AF_NONE, NULL, NULL }
2713 const struct gdb_xml_element thread_children[] = {
2714 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2717 const struct gdb_xml_element threads_children[] = {
2718 { "thread", thread_attributes, thread_children,
2719 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
2720 start_thread, end_thread },
2721 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2724 const struct gdb_xml_element threads_elements[] = {
2725 { "threads", NULL, threads_children,
2726 GDB_XML_EF_NONE, NULL, NULL },
2727 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2732 /* List remote threads using qXfer:threads:read. */
2735 remote_get_threads_with_qxfer (struct target_ops *ops,
2736 struct threads_listing_context *context)
2738 #if defined(HAVE_LIBEXPAT)
2739 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
2741 char *xml = target_read_stralloc (ops, TARGET_OBJECT_THREADS, NULL);
2742 struct cleanup *back_to = make_cleanup (xfree, xml);
2744 if (xml != NULL && *xml != '\0')
2746 gdb_xml_parse_quick (_("threads"), "threads.dtd",
2747 threads_elements, xml, context);
2750 do_cleanups (back_to);
2758 /* List remote threads using qfThreadInfo/qsThreadInfo. */
2761 remote_get_threads_with_qthreadinfo (struct target_ops *ops,
2762 struct threads_listing_context *context)
2764 struct remote_state *rs = get_remote_state ();
2766 if (rs->use_threadinfo_query)
2770 putpkt ("qfThreadInfo");
2771 getpkt (&rs->buf, &rs->buf_size, 0);
2773 if (bufp[0] != '\0') /* q packet recognized */
2775 while (*bufp++ == 'm') /* reply contains one or more TID */
2779 struct thread_item item;
2781 item.ptid = read_ptid (bufp, &bufp);
2785 VEC_safe_push (thread_item_t, context->items, &item);
2787 while (*bufp++ == ','); /* comma-separated list */
2788 putpkt ("qsThreadInfo");
2789 getpkt (&rs->buf, &rs->buf_size, 0);
2796 /* Packet not recognized. */
2797 rs->use_threadinfo_query = 0;
2804 /* Implement the to_update_thread_list function for the remote
2808 remote_update_thread_list (struct target_ops *ops)
2810 struct remote_state *rs = get_remote_state ();
2811 struct threads_listing_context context;
2812 struct cleanup *old_chain;
2815 context.items = NULL;
2816 old_chain = make_cleanup (clear_threads_listing_context, &context);
2818 /* We have a few different mechanisms to fetch the thread list. Try
2819 them all, starting with the most preferred one first, falling
2820 back to older methods. */
2821 if (remote_get_threads_with_qxfer (ops, &context)
2822 || remote_get_threads_with_qthreadinfo (ops, &context)
2823 || remote_get_threads_with_ql (ops, &context))
2826 struct thread_item *item;
2827 struct thread_info *tp, *tmp;
2831 if (VEC_empty (thread_item_t, context.items)
2832 && remote_thread_always_alive (ops, inferior_ptid))
2834 /* Some targets don't really support threads, but still
2835 reply an (empty) thread list in response to the thread
2836 listing packets, instead of replying "packet not
2837 supported". Exit early so we don't delete the main
2839 do_cleanups (old_chain);
2843 /* CONTEXT now holds the current thread list on the remote
2844 target end. Delete GDB-side threads no longer found on the
2846 ALL_NON_EXITED_THREADS_SAFE (tp, tmp)
2849 VEC_iterate (thread_item_t, context.items, i, item);
2852 if (ptid_equal (item->ptid, tp->ptid))
2856 if (i == VEC_length (thread_item_t, context.items))
2859 delete_thread (tp->ptid);
2863 /* And now add threads we don't know about yet to our list. */
2865 VEC_iterate (thread_item_t, context.items, i, item);
2868 if (!ptid_equal (item->ptid, null_ptid))
2870 struct private_thread_info *info;
2871 /* In non-stop mode, we assume new found threads are
2872 running until proven otherwise with a stop reply. In
2873 all-stop, we can only get here if all threads are
2875 int running = non_stop ? 1 : 0;
2877 remote_notice_new_inferior (item->ptid, running);
2879 info = demand_private_info (item->ptid);
2880 info->core = item->core;
2881 info->extra = item->extra;
2889 /* If no thread listing method is supported, then query whether
2890 each known thread is alive, one by one, with the T packet.
2891 If the target doesn't support threads at all, then this is a
2892 no-op. See remote_thread_alive. */
2896 do_cleanups (old_chain);
2900 * Collect a descriptive string about the given thread.
2901 * The target may say anything it wants to about the thread
2902 * (typically info about its blocked / runnable state, name, etc.).
2903 * This string will appear in the info threads display.
2905 * Optional: targets are not required to implement this function.
2909 remote_threads_extra_info (struct target_ops *self, struct thread_info *tp)
2911 struct remote_state *rs = get_remote_state ();
2915 struct gdb_ext_thread_info threadinfo;
2916 static char display_buf[100]; /* arbitrary... */
2917 int n = 0; /* position in display_buf */
2919 if (rs->remote_desc == 0) /* paranoia */
2920 internal_error (__FILE__, __LINE__,
2921 _("remote_threads_extra_info"));
2923 if (ptid_equal (tp->ptid, magic_null_ptid)
2924 || (ptid_get_pid (tp->ptid) != 0 && ptid_get_lwp (tp->ptid) == 0))
2925 /* This is the main thread which was added by GDB. The remote
2926 server doesn't know about it. */
2929 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
2931 struct thread_info *info = find_thread_ptid (tp->ptid);
2933 if (info && info->priv)
2934 return info->priv->extra;
2939 if (rs->use_threadextra_query)
2942 char *endb = rs->buf + get_remote_packet_size ();
2944 xsnprintf (b, endb - b, "qThreadExtraInfo,");
2946 write_ptid (b, endb, tp->ptid);
2949 getpkt (&rs->buf, &rs->buf_size, 0);
2950 if (rs->buf[0] != 0)
2952 n = min (strlen (rs->buf) / 2, sizeof (display_buf));
2953 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
2954 display_buf [result] = '\0';
2959 /* If the above query fails, fall back to the old method. */
2960 rs->use_threadextra_query = 0;
2961 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
2962 | TAG_MOREDISPLAY | TAG_DISPLAY;
2963 int_to_threadref (&id, ptid_get_lwp (tp->ptid));
2964 if (remote_get_threadinfo (&id, set, &threadinfo))
2965 if (threadinfo.active)
2967 if (*threadinfo.shortname)
2968 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
2969 " Name: %s,", threadinfo.shortname);
2970 if (*threadinfo.display)
2971 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2972 " State: %s,", threadinfo.display);
2973 if (*threadinfo.more_display)
2974 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2975 " Priority: %s", threadinfo.more_display);
2979 /* For purely cosmetic reasons, clear up trailing commas. */
2980 if (',' == display_buf[n-1])
2981 display_buf[n-1] = ' ';
2990 remote_static_tracepoint_marker_at (struct target_ops *self, CORE_ADDR addr,
2991 struct static_tracepoint_marker *marker)
2993 struct remote_state *rs = get_remote_state ();
2996 xsnprintf (p, get_remote_packet_size (), "qTSTMat:");
2998 p += hexnumstr (p, addr);
3000 getpkt (&rs->buf, &rs->buf_size, 0);
3004 error (_("Remote failure reply: %s"), p);
3008 parse_static_tracepoint_marker_definition (p, &p, marker);
3015 static VEC(static_tracepoint_marker_p) *
3016 remote_static_tracepoint_markers_by_strid (struct target_ops *self,
3019 struct remote_state *rs = get_remote_state ();
3020 VEC(static_tracepoint_marker_p) *markers = NULL;
3021 struct static_tracepoint_marker *marker = NULL;
3022 struct cleanup *old_chain;
3025 /* Ask for a first packet of static tracepoint marker
3028 getpkt (&rs->buf, &rs->buf_size, 0);
3031 error (_("Remote failure reply: %s"), p);
3033 old_chain = make_cleanup (free_current_marker, &marker);
3038 marker = XCNEW (struct static_tracepoint_marker);
3042 parse_static_tracepoint_marker_definition (p, &p, marker);
3044 if (strid == NULL || strcmp (strid, marker->str_id) == 0)
3046 VEC_safe_push (static_tracepoint_marker_p,
3052 release_static_tracepoint_marker (marker);
3053 memset (marker, 0, sizeof (*marker));
3056 while (*p++ == ','); /* comma-separated list */
3057 /* Ask for another packet of static tracepoint definition. */
3059 getpkt (&rs->buf, &rs->buf_size, 0);
3063 do_cleanups (old_chain);
3068 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3071 remote_get_ada_task_ptid (struct target_ops *self, long lwp, long thread)
3073 return ptid_build (ptid_get_pid (inferior_ptid), lwp, 0);
3077 /* Restart the remote side; this is an extended protocol operation. */
3080 extended_remote_restart (void)
3082 struct remote_state *rs = get_remote_state ();
3084 /* Send the restart command; for reasons I don't understand the
3085 remote side really expects a number after the "R". */
3086 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
3089 remote_fileio_reset ();
3092 /* Clean up connection to a remote debugger. */
3095 remote_close (struct target_ops *self)
3097 struct remote_state *rs = get_remote_state ();
3099 if (rs->remote_desc == NULL)
3100 return; /* already closed */
3102 /* Make sure we leave stdin registered in the event loop, and we
3103 don't leave the async SIGINT signal handler installed. */
3104 remote_terminal_ours (self);
3106 serial_close (rs->remote_desc);
3107 rs->remote_desc = NULL;
3109 /* We don't have a connection to the remote stub anymore. Get rid
3110 of all the inferiors and their threads we were controlling.
3111 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3112 will be unable to find the thread corresponding to (pid, 0, 0). */
3113 inferior_ptid = null_ptid;
3114 discard_all_inferiors ();
3116 /* We are closing the remote target, so we should discard
3117 everything of this target. */
3118 discard_pending_stop_replies_in_queue (rs);
3120 if (remote_async_inferior_event_token)
3121 delete_async_event_handler (&remote_async_inferior_event_token);
3123 remote_notif_state_xfree (rs->notif_state);
3125 trace_reset_local_state ();
3128 /* Query the remote side for the text, data and bss offsets. */
3133 struct remote_state *rs = get_remote_state ();
3136 int lose, num_segments = 0, do_sections, do_segments;
3137 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
3138 struct section_offsets *offs;
3139 struct symfile_segment_data *data;
3141 if (symfile_objfile == NULL)
3144 putpkt ("qOffsets");
3145 getpkt (&rs->buf, &rs->buf_size, 0);
3148 if (buf[0] == '\000')
3149 return; /* Return silently. Stub doesn't support
3153 warning (_("Remote failure reply: %s"), buf);
3157 /* Pick up each field in turn. This used to be done with scanf, but
3158 scanf will make trouble if CORE_ADDR size doesn't match
3159 conversion directives correctly. The following code will work
3160 with any size of CORE_ADDR. */
3161 text_addr = data_addr = bss_addr = 0;
3165 if (startswith (ptr, "Text="))
3168 /* Don't use strtol, could lose on big values. */
3169 while (*ptr && *ptr != ';')
3170 text_addr = (text_addr << 4) + fromhex (*ptr++);
3172 if (startswith (ptr, ";Data="))
3175 while (*ptr && *ptr != ';')
3176 data_addr = (data_addr << 4) + fromhex (*ptr++);
3181 if (!lose && startswith (ptr, ";Bss="))
3184 while (*ptr && *ptr != ';')
3185 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
3187 if (bss_addr != data_addr)
3188 warning (_("Target reported unsupported offsets: %s"), buf);
3193 else if (startswith (ptr, "TextSeg="))
3196 /* Don't use strtol, could lose on big values. */
3197 while (*ptr && *ptr != ';')
3198 text_addr = (text_addr << 4) + fromhex (*ptr++);
3201 if (startswith (ptr, ";DataSeg="))
3204 while (*ptr && *ptr != ';')
3205 data_addr = (data_addr << 4) + fromhex (*ptr++);
3213 error (_("Malformed response to offset query, %s"), buf);
3214 else if (*ptr != '\0')
3215 warning (_("Target reported unsupported offsets: %s"), buf);
3217 offs = ((struct section_offsets *)
3218 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
3219 memcpy (offs, symfile_objfile->section_offsets,
3220 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
3222 data = get_symfile_segment_data (symfile_objfile->obfd);
3223 do_segments = (data != NULL);
3224 do_sections = num_segments == 0;
3226 if (num_segments > 0)
3228 segments[0] = text_addr;
3229 segments[1] = data_addr;
3231 /* If we have two segments, we can still try to relocate everything
3232 by assuming that the .text and .data offsets apply to the whole
3233 text and data segments. Convert the offsets given in the packet
3234 to base addresses for symfile_map_offsets_to_segments. */
3235 else if (data && data->num_segments == 2)
3237 segments[0] = data->segment_bases[0] + text_addr;
3238 segments[1] = data->segment_bases[1] + data_addr;
3241 /* If the object file has only one segment, assume that it is text
3242 rather than data; main programs with no writable data are rare,
3243 but programs with no code are useless. Of course the code might
3244 have ended up in the data segment... to detect that we would need
3245 the permissions here. */
3246 else if (data && data->num_segments == 1)
3248 segments[0] = data->segment_bases[0] + text_addr;
3251 /* There's no way to relocate by segment. */
3257 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
3258 offs, num_segments, segments);
3260 if (ret == 0 && !do_sections)
3261 error (_("Can not handle qOffsets TextSeg "
3262 "response with this symbol file"));
3269 free_symfile_segment_data (data);
3273 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
3275 /* This is a temporary kludge to force data and bss to use the
3276 same offsets because that's what nlmconv does now. The real
3277 solution requires changes to the stub and remote.c that I
3278 don't have time to do right now. */
3280 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
3281 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
3284 objfile_relocate (symfile_objfile, offs);
3287 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
3288 threads we know are stopped already. This is used during the
3289 initial remote connection in non-stop mode --- threads that are
3290 reported as already being stopped are left stopped. */
3293 set_stop_requested_callback (struct thread_info *thread, void *data)
3295 /* If we have a stop reply for this thread, it must be stopped. */
3296 if (peek_stop_reply (thread->ptid))
3297 set_stop_requested (thread->ptid, 1);
3302 /* Send interrupt_sequence to remote target. */
3304 send_interrupt_sequence (void)
3306 struct remote_state *rs = get_remote_state ();
3308 if (interrupt_sequence_mode == interrupt_sequence_control_c)
3309 remote_serial_write ("\x03", 1);
3310 else if (interrupt_sequence_mode == interrupt_sequence_break)
3311 serial_send_break (rs->remote_desc);
3312 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
3314 serial_send_break (rs->remote_desc);
3315 remote_serial_write ("g", 1);
3318 internal_error (__FILE__, __LINE__,
3319 _("Invalid value for interrupt_sequence_mode: %s."),
3320 interrupt_sequence_mode);
3324 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3325 and extract the PTID. Returns NULL_PTID if not found. */
3328 stop_reply_extract_thread (char *stop_reply)
3330 if (stop_reply[0] == 'T' && strlen (stop_reply) > 3)
3334 /* Txx r:val ; r:val (...) */
3337 /* Look for "register" named "thread". */
3342 p1 = strchr (p, ':');
3346 if (strncmp (p, "thread", p1 - p) == 0)
3347 return read_ptid (++p1, &p);
3349 p1 = strchr (p, ';');
3361 /* Determine the remote side's current thread. If we have a stop
3362 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3363 "thread" register we can extract the current thread from. If not,
3364 ask the remote which is the current thread with qC. The former
3365 method avoids a roundtrip. */
3368 get_current_thread (char *wait_status)
3372 /* Note we don't use remote_parse_stop_reply as that makes use of
3373 the target architecture, which we haven't yet fully determined at
3375 if (wait_status != NULL)
3376 ptid = stop_reply_extract_thread (wait_status);
3377 if (ptid_equal (ptid, null_ptid))
3378 ptid = remote_current_thread (inferior_ptid);
3383 /* Query the remote target for which is the current thread/process,
3384 add it to our tables, and update INFERIOR_PTID. The caller is
3385 responsible for setting the state such that the remote end is ready
3386 to return the current thread.
3388 This function is called after handling the '?' or 'vRun' packets,
3389 whose response is a stop reply from which we can also try
3390 extracting the thread. If the target doesn't support the explicit
3391 qC query, we infer the current thread from that stop reply, passed
3392 in in WAIT_STATUS, which may be NULL. */
3395 add_current_inferior_and_thread (char *wait_status)
3397 struct remote_state *rs = get_remote_state ();
3399 ptid_t ptid = null_ptid;
3401 inferior_ptid = null_ptid;
3403 /* Now, if we have thread information, update inferior_ptid. */
3404 ptid = get_current_thread (wait_status);
3406 if (!ptid_equal (ptid, null_ptid))
3408 if (!remote_multi_process_p (rs))
3411 inferior_ptid = ptid;
3415 /* Without this, some commands which require an active target
3416 (such as kill) won't work. This variable serves (at least)
3417 double duty as both the pid of the target process (if it has
3418 such), and as a flag indicating that a target is active. */
3419 inferior_ptid = magic_null_ptid;
3423 remote_add_inferior (fake_pid_p, ptid_get_pid (inferior_ptid), -1);
3425 /* Add the main thread. */
3426 add_thread_silent (inferior_ptid);
3430 remote_start_remote (int from_tty, struct target_ops *target, int extended_p)
3432 struct remote_state *rs = get_remote_state ();
3433 struct packet_config *noack_config;
3434 char *wait_status = NULL;
3436 immediate_quit++; /* Allow user to interrupt it. */
3439 if (interrupt_on_connect)
3440 send_interrupt_sequence ();
3442 /* Ack any packet which the remote side has already sent. */
3443 serial_write (rs->remote_desc, "+", 1);
3445 /* Signal other parts that we're going through the initial setup,
3446 and so things may not be stable yet. */
3447 rs->starting_up = 1;
3449 /* The first packet we send to the target is the optional "supported
3450 packets" request. If the target can answer this, it will tell us
3451 which later probes to skip. */
3452 remote_query_supported ();
3454 /* If the stub wants to get a QAllow, compose one and send it. */
3455 if (packet_support (PACKET_QAllow) != PACKET_DISABLE)
3456 remote_set_permissions (target);
3458 /* Next, we possibly activate noack mode.
3460 If the QStartNoAckMode packet configuration is set to AUTO,
3461 enable noack mode if the stub reported a wish for it with
3464 If set to TRUE, then enable noack mode even if the stub didn't
3465 report it in qSupported. If the stub doesn't reply OK, the
3466 session ends with an error.
3468 If FALSE, then don't activate noack mode, regardless of what the
3469 stub claimed should be the default with qSupported. */
3471 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
3472 if (packet_config_support (noack_config) != PACKET_DISABLE)
3474 putpkt ("QStartNoAckMode");
3475 getpkt (&rs->buf, &rs->buf_size, 0);
3476 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
3482 /* Tell the remote that we are using the extended protocol. */
3484 getpkt (&rs->buf, &rs->buf_size, 0);
3487 /* Let the target know which signals it is allowed to pass down to
3489 update_signals_program_target ();
3491 /* Next, if the target can specify a description, read it. We do
3492 this before anything involving memory or registers. */
3493 target_find_description ();
3495 /* Next, now that we know something about the target, update the
3496 address spaces in the program spaces. */
3497 update_address_spaces ();
3499 /* On OSs where the list of libraries is global to all
3500 processes, we fetch them early. */
3501 if (gdbarch_has_global_solist (target_gdbarch ()))
3502 solib_add (NULL, from_tty, target, auto_solib_add);
3506 if (packet_support (PACKET_QNonStop) != PACKET_ENABLE)
3507 error (_("Non-stop mode requested, but remote "
3508 "does not support non-stop"));
3510 putpkt ("QNonStop:1");
3511 getpkt (&rs->buf, &rs->buf_size, 0);
3513 if (strcmp (rs->buf, "OK") != 0)
3514 error (_("Remote refused setting non-stop mode with: %s"), rs->buf);
3516 /* Find about threads and processes the stub is already
3517 controlling. We default to adding them in the running state.
3518 The '?' query below will then tell us about which threads are
3520 remote_update_thread_list (target);
3522 else if (packet_support (PACKET_QNonStop) == PACKET_ENABLE)
3524 /* Don't assume that the stub can operate in all-stop mode.
3525 Request it explicitly. */
3526 putpkt ("QNonStop:0");
3527 getpkt (&rs->buf, &rs->buf_size, 0);
3529 if (strcmp (rs->buf, "OK") != 0)
3530 error (_("Remote refused setting all-stop mode with: %s"), rs->buf);
3533 /* Upload TSVs regardless of whether the target is running or not. The
3534 remote stub, such as GDBserver, may have some predefined or builtin
3535 TSVs, even if the target is not running. */
3536 if (remote_get_trace_status (target, current_trace_status ()) != -1)
3538 struct uploaded_tsv *uploaded_tsvs = NULL;
3540 remote_upload_trace_state_variables (target, &uploaded_tsvs);
3541 merge_uploaded_trace_state_variables (&uploaded_tsvs);
3544 /* Check whether the target is running now. */
3546 getpkt (&rs->buf, &rs->buf_size, 0);
3552 struct inferior *inf;
3554 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
3557 error (_("The target is not running (try extended-remote?)"));
3559 /* We're connected, but not running. Drop out before we
3560 call start_remote. */
3561 rs->starting_up = 0;
3566 /* Save the reply for later. */
3567 wait_status = alloca (strlen (rs->buf) + 1);
3568 strcpy (wait_status, rs->buf);
3571 /* Fetch thread list. */
3572 target_update_thread_list ();
3574 /* Let the stub know that we want it to return the thread. */
3575 set_continue_thread (minus_one_ptid);
3577 if (thread_count () == 0)
3579 /* Target has no concept of threads at all. GDB treats
3580 non-threaded target as single-threaded; add a main
3582 add_current_inferior_and_thread (wait_status);
3586 /* We have thread information; select the thread the target
3587 says should be current. If we're reconnecting to a
3588 multi-threaded program, this will ideally be the thread
3589 that last reported an event before GDB disconnected. */
3590 inferior_ptid = get_current_thread (wait_status);
3591 if (ptid_equal (inferior_ptid, null_ptid))
3593 /* Odd... The target was able to list threads, but not
3594 tell us which thread was current (no "thread"
3595 register in T stop reply?). Just pick the first
3596 thread in the thread list then. */
3597 inferior_ptid = thread_list->ptid;
3601 /* init_wait_for_inferior should be called before get_offsets in order
3602 to manage `inserted' flag in bp loc in a correct state.
3603 breakpoint_init_inferior, called from init_wait_for_inferior, set
3604 `inserted' flag to 0, while before breakpoint_re_set, called from
3605 start_remote, set `inserted' flag to 1. In the initialization of
3606 inferior, breakpoint_init_inferior should be called first, and then
3607 breakpoint_re_set can be called. If this order is broken, state of
3608 `inserted' flag is wrong, and cause some problems on breakpoint
3610 init_wait_for_inferior ();
3612 get_offsets (); /* Get text, data & bss offsets. */
3614 /* If we could not find a description using qXfer, and we know
3615 how to do it some other way, try again. This is not
3616 supported for non-stop; it could be, but it is tricky if
3617 there are no stopped threads when we connect. */
3618 if (remote_read_description_p (target)
3619 && gdbarch_target_desc (target_gdbarch ()) == NULL)
3621 target_clear_description ();
3622 target_find_description ();
3625 /* Use the previously fetched status. */
3626 gdb_assert (wait_status != NULL);
3627 strcpy (rs->buf, wait_status);
3628 rs->cached_wait_status = 1;
3631 start_remote (from_tty); /* Initialize gdb process mechanisms. */
3635 /* Clear WFI global state. Do this before finding about new
3636 threads and inferiors, and setting the current inferior.
3637 Otherwise we would clear the proceed status of the current
3638 inferior when we want its stop_soon state to be preserved
3639 (see notice_new_inferior). */
3640 init_wait_for_inferior ();
3642 /* In non-stop, we will either get an "OK", meaning that there
3643 are no stopped threads at this time; or, a regular stop
3644 reply. In the latter case, there may be more than one thread
3645 stopped --- we pull them all out using the vStopped
3647 if (strcmp (rs->buf, "OK") != 0)
3649 struct notif_client *notif = ¬if_client_stop;
3651 /* remote_notif_get_pending_replies acks this one, and gets
3653 rs->notif_state->pending_event[notif_client_stop.id]
3654 = remote_notif_parse (notif, rs->buf);
3655 remote_notif_get_pending_events (notif);
3657 /* Make sure that threads that were stopped remain
3659 iterate_over_threads (set_stop_requested_callback, NULL);
3662 if (target_can_async_p ())
3663 target_async (inferior_event_handler, 0);
3665 if (thread_count () == 0)
3668 error (_("The target is not running (try extended-remote?)"));
3670 /* We're connected, but not running. Drop out before we
3671 call start_remote. */
3672 rs->starting_up = 0;
3676 /* Let the stub know that we want it to return the thread. */
3678 /* Force the stub to choose a thread. */
3679 set_general_thread (null_ptid);
3682 inferior_ptid = remote_current_thread (minus_one_ptid);
3683 if (ptid_equal (inferior_ptid, minus_one_ptid))
3684 error (_("remote didn't report the current thread in non-stop mode"));
3686 get_offsets (); /* Get text, data & bss offsets. */
3688 /* In non-stop mode, any cached wait status will be stored in
3689 the stop reply queue. */
3690 gdb_assert (wait_status == NULL);
3692 /* Report all signals during attach/startup. */
3693 remote_pass_signals (target, 0, NULL);
3696 /* If we connected to a live target, do some additional setup. */
3697 if (target_has_execution)
3699 if (symfile_objfile) /* No use without a symbol-file. */
3700 remote_check_symbols ();
3703 /* Possibly the target has been engaged in a trace run started
3704 previously; find out where things are at. */
3705 if (remote_get_trace_status (target, current_trace_status ()) != -1)
3707 struct uploaded_tp *uploaded_tps = NULL;
3709 if (current_trace_status ()->running)
3710 printf_filtered (_("Trace is already running on the target.\n"));
3712 remote_upload_tracepoints (target, &uploaded_tps);
3714 merge_uploaded_tracepoints (&uploaded_tps);
3717 /* The thread and inferior lists are now synchronized with the
3718 target, our symbols have been relocated, and we're merged the
3719 target's tracepoints with ours. We're done with basic start
3721 rs->starting_up = 0;
3723 /* Maybe breakpoints are global and need to be inserted now. */
3724 if (breakpoints_should_be_inserted_now ())
3725 insert_breakpoints ();
3728 /* Open a connection to a remote debugger.
3729 NAME is the filename used for communication. */
3732 remote_open (const char *name, int from_tty)
3734 remote_open_1 (name, from_tty, &remote_ops, 0);
3737 /* Open a connection to a remote debugger using the extended
3738 remote gdb protocol. NAME is the filename used for communication. */
3741 extended_remote_open (const char *name, int from_tty)
3743 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
3746 /* Reset all packets back to "unknown support". Called when opening a
3747 new connection to a remote target. */
3750 reset_all_packet_configs_support (void)
3754 for (i = 0; i < PACKET_MAX; i++)
3755 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
3758 /* Initialize all packet configs. */
3761 init_all_packet_configs (void)
3765 for (i = 0; i < PACKET_MAX; i++)
3767 remote_protocol_packets[i].detect = AUTO_BOOLEAN_AUTO;
3768 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
3772 /* Symbol look-up. */
3775 remote_check_symbols (void)
3777 struct remote_state *rs = get_remote_state ();
3778 char *msg, *reply, *tmp;
3779 struct bound_minimal_symbol sym;
3782 /* The remote side has no concept of inferiors that aren't running
3783 yet, it only knows about running processes. If we're connected
3784 but our current inferior is not running, we should not invite the
3785 remote target to request symbol lookups related to its
3786 (unrelated) current process. */
3787 if (!target_has_execution)
3790 if (packet_support (PACKET_qSymbol) == PACKET_DISABLE)
3793 /* Make sure the remote is pointing at the right process. Note
3794 there's no way to select "no process". */
3795 set_general_process ();
3797 /* Allocate a message buffer. We can't reuse the input buffer in RS,
3798 because we need both at the same time. */
3799 msg = alloca (get_remote_packet_size ());
3801 /* Invite target to request symbol lookups. */
3803 putpkt ("qSymbol::");
3804 getpkt (&rs->buf, &rs->buf_size, 0);
3805 packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]);
3808 while (startswith (reply, "qSymbol:"))
3810 struct bound_minimal_symbol sym;
3813 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
3815 sym = lookup_minimal_symbol (msg, NULL, NULL);
3816 if (sym.minsym == NULL)
3817 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
3820 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
3821 CORE_ADDR sym_addr = BMSYMBOL_VALUE_ADDRESS (sym);
3823 /* If this is a function address, return the start of code
3824 instead of any data function descriptor. */
3825 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
3829 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
3830 phex_nz (sym_addr, addr_size), &reply[8]);
3834 getpkt (&rs->buf, &rs->buf_size, 0);
3839 static struct serial *
3840 remote_serial_open (const char *name)
3842 static int udp_warning = 0;
3844 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
3845 of in ser-tcp.c, because it is the remote protocol assuming that the
3846 serial connection is reliable and not the serial connection promising
3848 if (!udp_warning && startswith (name, "udp:"))
3850 warning (_("The remote protocol may be unreliable over UDP.\n"
3851 "Some events may be lost, rendering further debugging "
3856 return serial_open (name);
3859 /* Inform the target of our permission settings. The permission flags
3860 work without this, but if the target knows the settings, it can do
3861 a couple things. First, it can add its own check, to catch cases
3862 that somehow manage to get by the permissions checks in target
3863 methods. Second, if the target is wired to disallow particular
3864 settings (for instance, a system in the field that is not set up to
3865 be able to stop at a breakpoint), it can object to any unavailable
3869 remote_set_permissions (struct target_ops *self)
3871 struct remote_state *rs = get_remote_state ();
3873 xsnprintf (rs->buf, get_remote_packet_size (), "QAllow:"
3874 "WriteReg:%x;WriteMem:%x;"
3875 "InsertBreak:%x;InsertTrace:%x;"
3876 "InsertFastTrace:%x;Stop:%x",
3877 may_write_registers, may_write_memory,
3878 may_insert_breakpoints, may_insert_tracepoints,
3879 may_insert_fast_tracepoints, may_stop);
3881 getpkt (&rs->buf, &rs->buf_size, 0);
3883 /* If the target didn't like the packet, warn the user. Do not try
3884 to undo the user's settings, that would just be maddening. */
3885 if (strcmp (rs->buf, "OK") != 0)
3886 warning (_("Remote refused setting permissions with: %s"), rs->buf);
3889 /* This type describes each known response to the qSupported
3891 struct protocol_feature
3893 /* The name of this protocol feature. */
3896 /* The default for this protocol feature. */
3897 enum packet_support default_support;
3899 /* The function to call when this feature is reported, or after
3900 qSupported processing if the feature is not supported.
3901 The first argument points to this structure. The second
3902 argument indicates whether the packet requested support be
3903 enabled, disabled, or probed (or the default, if this function
3904 is being called at the end of processing and this feature was
3905 not reported). The third argument may be NULL; if not NULL, it
3906 is a NUL-terminated string taken from the packet following
3907 this feature's name and an equals sign. */
3908 void (*func) (const struct protocol_feature *, enum packet_support,
3911 /* The corresponding packet for this feature. Only used if
3912 FUNC is remote_supported_packet. */
3917 remote_supported_packet (const struct protocol_feature *feature,
3918 enum packet_support support,
3919 const char *argument)
3923 warning (_("Remote qSupported response supplied an unexpected value for"
3924 " \"%s\"."), feature->name);
3928 remote_protocol_packets[feature->packet].support = support;
3932 remote_packet_size (const struct protocol_feature *feature,
3933 enum packet_support support, const char *value)
3935 struct remote_state *rs = get_remote_state ();
3940 if (support != PACKET_ENABLE)
3943 if (value == NULL || *value == '\0')
3945 warning (_("Remote target reported \"%s\" without a size."),
3951 packet_size = strtol (value, &value_end, 16);
3952 if (errno != 0 || *value_end != '\0' || packet_size < 0)
3954 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
3955 feature->name, value);
3959 if (packet_size > MAX_REMOTE_PACKET_SIZE)
3961 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
3962 packet_size, MAX_REMOTE_PACKET_SIZE);
3963 packet_size = MAX_REMOTE_PACKET_SIZE;
3966 /* Record the new maximum packet size. */
3967 rs->explicit_packet_size = packet_size;
3970 static const struct protocol_feature remote_protocol_features[] = {
3971 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
3972 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
3973 PACKET_qXfer_auxv },
3974 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
3975 PACKET_qXfer_features },
3976 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
3977 PACKET_qXfer_libraries },
3978 { "qXfer:libraries-svr4:read", PACKET_DISABLE, remote_supported_packet,
3979 PACKET_qXfer_libraries_svr4 },
3980 { "augmented-libraries-svr4-read", PACKET_DISABLE,
3981 remote_supported_packet, PACKET_augmented_libraries_svr4_read_feature },
3982 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
3983 PACKET_qXfer_memory_map },
3984 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
3985 PACKET_qXfer_spu_read },
3986 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
3987 PACKET_qXfer_spu_write },
3988 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
3989 PACKET_qXfer_osdata },
3990 { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet,
3991 PACKET_qXfer_threads },
3992 { "qXfer:traceframe-info:read", PACKET_DISABLE, remote_supported_packet,
3993 PACKET_qXfer_traceframe_info },
3994 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
3995 PACKET_QPassSignals },
3996 { "QProgramSignals", PACKET_DISABLE, remote_supported_packet,
3997 PACKET_QProgramSignals },
3998 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
3999 PACKET_QStartNoAckMode },
4000 { "multiprocess", PACKET_DISABLE, remote_supported_packet,
4001 PACKET_multiprocess_feature },
4002 { "QNonStop", PACKET_DISABLE, remote_supported_packet, PACKET_QNonStop },
4003 { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
4004 PACKET_qXfer_siginfo_read },
4005 { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
4006 PACKET_qXfer_siginfo_write },
4007 { "ConditionalTracepoints", PACKET_DISABLE, remote_supported_packet,
4008 PACKET_ConditionalTracepoints },
4009 { "ConditionalBreakpoints", PACKET_DISABLE, remote_supported_packet,
4010 PACKET_ConditionalBreakpoints },
4011 { "BreakpointCommands", PACKET_DISABLE, remote_supported_packet,
4012 PACKET_BreakpointCommands },
4013 { "FastTracepoints", PACKET_DISABLE, remote_supported_packet,
4014 PACKET_FastTracepoints },
4015 { "StaticTracepoints", PACKET_DISABLE, remote_supported_packet,
4016 PACKET_StaticTracepoints },
4017 {"InstallInTrace", PACKET_DISABLE, remote_supported_packet,
4018 PACKET_InstallInTrace},
4019 { "DisconnectedTracing", PACKET_DISABLE, remote_supported_packet,
4020 PACKET_DisconnectedTracing_feature },
4021 { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
4023 { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
4025 { "TracepointSource", PACKET_DISABLE, remote_supported_packet,
4026 PACKET_TracepointSource },
4027 { "QAllow", PACKET_DISABLE, remote_supported_packet,
4029 { "EnableDisableTracepoints", PACKET_DISABLE, remote_supported_packet,
4030 PACKET_EnableDisableTracepoints_feature },
4031 { "qXfer:fdpic:read", PACKET_DISABLE, remote_supported_packet,
4032 PACKET_qXfer_fdpic },
4033 { "qXfer:uib:read", PACKET_DISABLE, remote_supported_packet,
4035 { "QDisableRandomization", PACKET_DISABLE, remote_supported_packet,
4036 PACKET_QDisableRandomization },
4037 { "QAgent", PACKET_DISABLE, remote_supported_packet, PACKET_QAgent},
4038 { "QTBuffer:size", PACKET_DISABLE,
4039 remote_supported_packet, PACKET_QTBuffer_size},
4040 { "tracenz", PACKET_DISABLE, remote_supported_packet, PACKET_tracenz_feature },
4041 { "Qbtrace:off", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_off },
4042 { "Qbtrace:bts", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_bts },
4043 { "qXfer:btrace:read", PACKET_DISABLE, remote_supported_packet,
4044 PACKET_qXfer_btrace },
4045 { "qXfer:btrace-conf:read", PACKET_DISABLE, remote_supported_packet,
4046 PACKET_qXfer_btrace_conf },
4047 { "Qbtrace-conf:bts:size", PACKET_DISABLE, remote_supported_packet,
4048 PACKET_Qbtrace_conf_bts_size },
4049 { "swbreak", PACKET_DISABLE, remote_supported_packet, PACKET_swbreak_feature },
4050 { "hwbreak", PACKET_DISABLE, remote_supported_packet, PACKET_hwbreak_feature }
4053 static char *remote_support_xml;
4055 /* Register string appended to "xmlRegisters=" in qSupported query. */
4058 register_remote_support_xml (const char *xml)
4060 #if defined(HAVE_LIBEXPAT)
4061 if (remote_support_xml == NULL)
4062 remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL);
4065 char *copy = xstrdup (remote_support_xml + 13);
4066 char *p = strtok (copy, ",");
4070 if (strcmp (p, xml) == 0)
4077 while ((p = strtok (NULL, ",")) != NULL);
4080 remote_support_xml = reconcat (remote_support_xml,
4081 remote_support_xml, ",", xml,
4088 remote_query_supported_append (char *msg, const char *append)
4091 return reconcat (msg, msg, ";", append, (char *) NULL);
4093 return xstrdup (append);
4097 remote_query_supported (void)
4099 struct remote_state *rs = get_remote_state ();
4102 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
4104 /* The packet support flags are handled differently for this packet
4105 than for most others. We treat an error, a disabled packet, and
4106 an empty response identically: any features which must be reported
4107 to be used will be automatically disabled. An empty buffer
4108 accomplishes this, since that is also the representation for a list
4109 containing no features. */
4112 if (packet_support (PACKET_qSupported) != PACKET_DISABLE)
4115 struct cleanup *old_chain = make_cleanup (free_current_contents, &q);
4117 q = remote_query_supported_append (q, "multiprocess+");
4119 if (packet_set_cmd_state (PACKET_swbreak_feature) != AUTO_BOOLEAN_FALSE)
4120 q = remote_query_supported_append (q, "swbreak+");
4121 if (packet_set_cmd_state (PACKET_hwbreak_feature) != AUTO_BOOLEAN_FALSE)
4122 q = remote_query_supported_append (q, "hwbreak+");
4124 if (remote_support_xml)
4125 q = remote_query_supported_append (q, remote_support_xml);
4127 q = remote_query_supported_append (q, "qRelocInsn+");
4129 q = reconcat (q, "qSupported:", q, (char *) NULL);
4132 do_cleanups (old_chain);
4134 getpkt (&rs->buf, &rs->buf_size, 0);
4136 /* If an error occured, warn, but do not return - just reset the
4137 buffer to empty and go on to disable features. */
4138 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
4141 warning (_("Remote failure reply: %s"), rs->buf);
4146 memset (seen, 0, sizeof (seen));
4151 enum packet_support is_supported;
4152 char *p, *end, *name_end, *value;
4154 /* First separate out this item from the rest of the packet. If
4155 there's another item after this, we overwrite the separator
4156 (terminated strings are much easier to work with). */
4158 end = strchr (p, ';');
4161 end = p + strlen (p);
4171 warning (_("empty item in \"qSupported\" response"));
4176 name_end = strchr (p, '=');
4179 /* This is a name=value entry. */
4180 is_supported = PACKET_ENABLE;
4181 value = name_end + 1;
4190 is_supported = PACKET_ENABLE;
4194 is_supported = PACKET_DISABLE;
4198 is_supported = PACKET_SUPPORT_UNKNOWN;
4202 warning (_("unrecognized item \"%s\" "
4203 "in \"qSupported\" response"), p);
4209 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4210 if (strcmp (remote_protocol_features[i].name, p) == 0)
4212 const struct protocol_feature *feature;
4215 feature = &remote_protocol_features[i];
4216 feature->func (feature, is_supported, value);
4221 /* If we increased the packet size, make sure to increase the global
4222 buffer size also. We delay this until after parsing the entire
4223 qSupported packet, because this is the same buffer we were
4225 if (rs->buf_size < rs->explicit_packet_size)
4227 rs->buf_size = rs->explicit_packet_size;
4228 rs->buf = xrealloc (rs->buf, rs->buf_size);
4231 /* Handle the defaults for unmentioned features. */
4232 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4235 const struct protocol_feature *feature;
4237 feature = &remote_protocol_features[i];
4238 feature->func (feature, feature->default_support, NULL);
4242 /* Remove any of the remote.c targets from target stack. Upper targets depend
4243 on it so remove them first. */
4246 remote_unpush_target (void)
4248 pop_all_targets_above (process_stratum - 1);
4252 remote_open_1 (const char *name, int from_tty,
4253 struct target_ops *target, int extended_p)
4255 struct remote_state *rs = get_remote_state ();
4258 error (_("To open a remote debug connection, you need to specify what\n"
4259 "serial device is attached to the remote system\n"
4260 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4262 /* See FIXME above. */
4263 if (!target_async_permitted)
4264 wait_forever_enabled_p = 1;
4266 /* If we're connected to a running target, target_preopen will kill it.
4267 Ask this question first, before target_preopen has a chance to kill
4269 if (rs->remote_desc != NULL && !have_inferiors ())
4272 && !query (_("Already connected to a remote target. Disconnect? ")))
4273 error (_("Still connected."));
4276 /* Here the possibly existing remote target gets unpushed. */
4277 target_preopen (from_tty);
4279 /* Make sure we send the passed signals list the next time we resume. */
4280 xfree (rs->last_pass_packet);
4281 rs->last_pass_packet = NULL;
4283 /* Make sure we send the program signals list the next time we
4285 xfree (rs->last_program_signals_packet);
4286 rs->last_program_signals_packet = NULL;
4288 remote_fileio_reset ();
4289 reopen_exec_file ();
4292 rs->remote_desc = remote_serial_open (name);
4293 if (!rs->remote_desc)
4294 perror_with_name (name);
4296 if (baud_rate != -1)
4298 if (serial_setbaudrate (rs->remote_desc, baud_rate))
4300 /* The requested speed could not be set. Error out to
4301 top level after closing remote_desc. Take care to
4302 set remote_desc to NULL to avoid closing remote_desc
4304 serial_close (rs->remote_desc);
4305 rs->remote_desc = NULL;
4306 perror_with_name (name);
4310 serial_raw (rs->remote_desc);
4312 /* If there is something sitting in the buffer we might take it as a
4313 response to a command, which would be bad. */
4314 serial_flush_input (rs->remote_desc);
4318 puts_filtered ("Remote debugging using ");
4319 puts_filtered (name);
4320 puts_filtered ("\n");
4322 push_target (target); /* Switch to using remote target now. */
4324 /* Register extra event sources in the event loop. */
4325 remote_async_inferior_event_token
4326 = create_async_event_handler (remote_async_inferior_event_handler,
4328 rs->notif_state = remote_notif_state_allocate ();
4330 /* Reset the target state; these things will be queried either by
4331 remote_query_supported or as they are needed. */
4332 reset_all_packet_configs_support ();
4333 rs->cached_wait_status = 0;
4334 rs->explicit_packet_size = 0;
4336 rs->extended = extended_p;
4337 rs->waiting_for_stop_reply = 0;
4338 rs->ctrlc_pending_p = 0;
4340 rs->general_thread = not_sent_ptid;
4341 rs->continue_thread = not_sent_ptid;
4342 rs->remote_traceframe_number = -1;
4344 /* Probe for ability to use "ThreadInfo" query, as required. */
4345 rs->use_threadinfo_query = 1;
4346 rs->use_threadextra_query = 1;
4348 if (target_async_permitted)
4350 /* With this target we start out by owning the terminal. */
4351 remote_async_terminal_ours_p = 1;
4353 /* FIXME: cagney/1999-09-23: During the initial connection it is
4354 assumed that the target is already ready and able to respond to
4355 requests. Unfortunately remote_start_remote() eventually calls
4356 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
4357 around this. Eventually a mechanism that allows
4358 wait_for_inferior() to expect/get timeouts will be
4360 wait_forever_enabled_p = 0;
4363 /* First delete any symbols previously loaded from shared libraries. */
4364 no_shared_libraries (NULL, 0);
4367 init_thread_list ();
4369 /* Start the remote connection. If error() or QUIT, discard this
4370 target (we'd otherwise be in an inconsistent state) and then
4371 propogate the error on up the exception chain. This ensures that
4372 the caller doesn't stumble along blindly assuming that the
4373 function succeeded. The CLI doesn't have this problem but other
4374 UI's, such as MI do.
4376 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
4377 this function should return an error indication letting the
4378 caller restore the previous state. Unfortunately the command
4379 ``target remote'' is directly wired to this function making that
4380 impossible. On a positive note, the CLI side of this problem has
4381 been fixed - the function set_cmd_context() makes it possible for
4382 all the ``target ....'' commands to share a common callback
4383 function. See cli-dump.c. */
4385 volatile struct gdb_exception ex;
4387 TRY_CATCH (ex, RETURN_MASK_ALL)
4389 remote_start_remote (from_tty, target, extended_p);
4393 /* Pop the partially set up target - unless something else did
4394 already before throwing the exception. */
4395 if (rs->remote_desc != NULL)
4396 remote_unpush_target ();
4397 if (target_async_permitted)
4398 wait_forever_enabled_p = 1;
4399 throw_exception (ex);
4403 remote_btrace_reset ();
4405 if (target_async_permitted)
4406 wait_forever_enabled_p = 1;
4409 /* This takes a program previously attached to and detaches it. After
4410 this is done, GDB can be used to debug some other program. We
4411 better not have left any breakpoints in the target program or it'll
4412 die when it hits one. */
4415 remote_detach_1 (const char *args, int from_tty, int extended)
4417 int pid = ptid_get_pid (inferior_ptid);
4418 struct remote_state *rs = get_remote_state ();
4421 error (_("Argument given to \"detach\" when remotely debugging."));
4423 if (!target_has_execution)
4424 error (_("No process to detach from."));
4428 char *exec_file = get_exec_file (0);
4429 if (exec_file == NULL)
4431 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
4432 target_pid_to_str (pid_to_ptid (pid)));
4433 gdb_flush (gdb_stdout);
4436 /* Tell the remote target to detach. */
4437 if (remote_multi_process_p (rs))
4438 xsnprintf (rs->buf, get_remote_packet_size (), "D;%x", pid);
4440 strcpy (rs->buf, "D");
4443 getpkt (&rs->buf, &rs->buf_size, 0);
4445 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
4447 else if (rs->buf[0] == '\0')
4448 error (_("Remote doesn't know how to detach"));
4450 error (_("Can't detach process."));
4452 if (from_tty && !extended)
4453 puts_filtered (_("Ending remote debugging.\n"));
4455 target_mourn_inferior ();
4459 remote_detach (struct target_ops *ops, const char *args, int from_tty)
4461 remote_detach_1 (args, from_tty, 0);
4465 extended_remote_detach (struct target_ops *ops, const char *args, int from_tty)
4467 remote_detach_1 (args, from_tty, 1);
4470 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
4473 remote_disconnect (struct target_ops *target, const char *args, int from_tty)
4476 error (_("Argument given to \"disconnect\" when remotely debugging."));
4478 /* Make sure we unpush even the extended remote targets; mourn
4479 won't do it. So call remote_mourn_1 directly instead of
4480 target_mourn_inferior. */
4481 remote_mourn_1 (target);
4484 puts_filtered ("Ending remote debugging.\n");
4487 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
4488 be chatty about it. */
4491 extended_remote_attach_1 (struct target_ops *target, const char *args,
4494 struct remote_state *rs = get_remote_state ();
4496 char *wait_status = NULL;
4498 pid = parse_pid_to_attach (args);
4500 /* Remote PID can be freely equal to getpid, do not check it here the same
4501 way as in other targets. */
4503 if (packet_support (PACKET_vAttach) == PACKET_DISABLE)
4504 error (_("This target does not support attaching to a process"));
4508 char *exec_file = get_exec_file (0);
4511 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
4512 target_pid_to_str (pid_to_ptid (pid)));
4514 printf_unfiltered (_("Attaching to %s\n"),
4515 target_pid_to_str (pid_to_ptid (pid)));
4517 gdb_flush (gdb_stdout);
4520 xsnprintf (rs->buf, get_remote_packet_size (), "vAttach;%x", pid);
4522 getpkt (&rs->buf, &rs->buf_size, 0);
4524 switch (packet_ok (rs->buf,
4525 &remote_protocol_packets[PACKET_vAttach]))
4530 /* Save the reply for later. */
4531 wait_status = alloca (strlen (rs->buf) + 1);
4532 strcpy (wait_status, rs->buf);
4534 else if (strcmp (rs->buf, "OK") != 0)
4535 error (_("Attaching to %s failed with: %s"),
4536 target_pid_to_str (pid_to_ptid (pid)),
4539 case PACKET_UNKNOWN:
4540 error (_("This target does not support attaching to a process"));
4542 error (_("Attaching to %s failed"),
4543 target_pid_to_str (pid_to_ptid (pid)));
4546 set_current_inferior (remote_add_inferior (0, pid, 1));
4548 inferior_ptid = pid_to_ptid (pid);
4552 struct thread_info *thread;
4554 /* Get list of threads. */
4555 remote_update_thread_list (target);
4557 thread = first_thread_of_process (pid);
4559 inferior_ptid = thread->ptid;
4561 inferior_ptid = pid_to_ptid (pid);
4563 /* Invalidate our notion of the remote current thread. */
4564 record_currthread (rs, minus_one_ptid);
4568 /* Now, if we have thread information, update inferior_ptid. */
4569 inferior_ptid = remote_current_thread (inferior_ptid);
4571 /* Add the main thread to the thread list. */
4572 add_thread_silent (inferior_ptid);
4575 /* Next, if the target can specify a description, read it. We do
4576 this before anything involving memory or registers. */
4577 target_find_description ();
4581 /* Use the previously fetched status. */
4582 gdb_assert (wait_status != NULL);
4584 if (target_can_async_p ())
4586 struct notif_event *reply
4587 = remote_notif_parse (¬if_client_stop, wait_status);
4589 push_stop_reply ((struct stop_reply *) reply);
4591 target_async (inferior_event_handler, 0);
4595 gdb_assert (wait_status != NULL);
4596 strcpy (rs->buf, wait_status);
4597 rs->cached_wait_status = 1;
4601 gdb_assert (wait_status == NULL);
4605 extended_remote_attach (struct target_ops *ops, const char *args, int from_tty)
4607 extended_remote_attach_1 (ops, args, from_tty);
4610 /* Implementation of the to_post_attach method. */
4613 extended_remote_post_attach (struct target_ops *ops, int pid)
4615 /* In certain cases GDB might not have had the chance to start
4616 symbol lookup up until now. This could happen if the debugged
4617 binary is not using shared libraries, the vsyscall page is not
4618 present (on Linux) and the binary itself hadn't changed since the
4619 debugging process was started. */
4620 if (symfile_objfile != NULL)
4621 remote_check_symbols();
4625 /* Check for the availability of vCont. This function should also check
4629 remote_vcont_probe (struct remote_state *rs)
4633 strcpy (rs->buf, "vCont?");
4635 getpkt (&rs->buf, &rs->buf_size, 0);
4638 /* Make sure that the features we assume are supported. */
4639 if (startswith (buf, "vCont"))
4642 int support_s, support_S, support_c, support_C;
4648 rs->supports_vCont.t = 0;
4649 rs->supports_vCont.r = 0;
4650 while (p && *p == ';')
4653 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
4655 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
4657 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
4659 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
4661 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
4662 rs->supports_vCont.t = 1;
4663 else if (*p == 'r' && (*(p + 1) == ';' || *(p + 1) == 0))
4664 rs->supports_vCont.r = 1;
4666 p = strchr (p, ';');
4669 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
4670 BUF will make packet_ok disable the packet. */
4671 if (!support_s || !support_S || !support_c || !support_C)
4675 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
4678 /* Helper function for building "vCont" resumptions. Write a
4679 resumption to P. ENDP points to one-passed-the-end of the buffer
4680 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
4681 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
4682 resumed thread should be single-stepped and/or signalled. If PTID
4683 equals minus_one_ptid, then all threads are resumed; if PTID
4684 represents a process, then all threads of the process are resumed;
4685 the thread to be stepped and/or signalled is given in the global
4689 append_resumption (char *p, char *endp,
4690 ptid_t ptid, int step, enum gdb_signal siggnal)
4692 struct remote_state *rs = get_remote_state ();
4694 if (step && siggnal != GDB_SIGNAL_0)
4695 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
4697 /* GDB is willing to range step. */
4698 && use_range_stepping
4699 /* Target supports range stepping. */
4700 && rs->supports_vCont.r
4701 /* We don't currently support range stepping multiple
4702 threads with a wildcard (though the protocol allows it,
4703 so stubs shouldn't make an active effort to forbid
4705 && !(remote_multi_process_p (rs) && ptid_is_pid (ptid)))
4707 struct thread_info *tp;
4709 if (ptid_equal (ptid, minus_one_ptid))
4711 /* If we don't know about the target thread's tid, then
4712 we're resuming magic_null_ptid (see caller). */
4713 tp = find_thread_ptid (magic_null_ptid);
4716 tp = find_thread_ptid (ptid);
4717 gdb_assert (tp != NULL);
4719 if (tp->control.may_range_step)
4721 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
4723 p += xsnprintf (p, endp - p, ";r%s,%s",
4724 phex_nz (tp->control.step_range_start,
4726 phex_nz (tp->control.step_range_end,
4730 p += xsnprintf (p, endp - p, ";s");
4733 p += xsnprintf (p, endp - p, ";s");
4734 else if (siggnal != GDB_SIGNAL_0)
4735 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
4737 p += xsnprintf (p, endp - p, ";c");
4739 if (remote_multi_process_p (rs) && ptid_is_pid (ptid))
4743 /* All (-1) threads of process. */
4744 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
4746 p += xsnprintf (p, endp - p, ":");
4747 p = write_ptid (p, endp, nptid);
4749 else if (!ptid_equal (ptid, minus_one_ptid))
4751 p += xsnprintf (p, endp - p, ":");
4752 p = write_ptid (p, endp, ptid);
4758 /* Append a vCont continue-with-signal action for threads that have a
4759 non-zero stop signal. */
4762 append_pending_thread_resumptions (char *p, char *endp, ptid_t ptid)
4764 struct thread_info *thread;
4766 ALL_NON_EXITED_THREADS (thread)
4767 if (ptid_match (thread->ptid, ptid)
4768 && !ptid_equal (inferior_ptid, thread->ptid)
4769 && thread->suspend.stop_signal != GDB_SIGNAL_0)
4771 p = append_resumption (p, endp, thread->ptid,
4772 0, thread->suspend.stop_signal);
4773 thread->suspend.stop_signal = GDB_SIGNAL_0;
4779 /* Resume the remote inferior by using a "vCont" packet. The thread
4780 to be resumed is PTID; STEP and SIGGNAL indicate whether the
4781 resumed thread should be single-stepped and/or signalled. If PTID
4782 equals minus_one_ptid, then all threads are resumed; the thread to
4783 be stepped and/or signalled is given in the global INFERIOR_PTID.
4784 This function returns non-zero iff it resumes the inferior.
4786 This function issues a strict subset of all possible vCont commands at the
4790 remote_vcont_resume (ptid_t ptid, int step, enum gdb_signal siggnal)
4792 struct remote_state *rs = get_remote_state ();
4796 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
4797 remote_vcont_probe (rs);
4799 if (packet_support (PACKET_vCont) == PACKET_DISABLE)
4803 endp = rs->buf + get_remote_packet_size ();
4805 /* If we could generate a wider range of packets, we'd have to worry
4806 about overflowing BUF. Should there be a generic
4807 "multi-part-packet" packet? */
4809 p += xsnprintf (p, endp - p, "vCont");
4811 if (ptid_equal (ptid, magic_null_ptid))
4813 /* MAGIC_NULL_PTID means that we don't have any active threads,
4814 so we don't have any TID numbers the inferior will
4815 understand. Make sure to only send forms that do not specify
4817 append_resumption (p, endp, minus_one_ptid, step, siggnal);
4819 else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
4821 /* Resume all threads (of all processes, or of a single
4822 process), with preference for INFERIOR_PTID. This assumes
4823 inferior_ptid belongs to the set of all threads we are about
4825 if (step || siggnal != GDB_SIGNAL_0)
4827 /* Step inferior_ptid, with or without signal. */
4828 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
4831 /* Also pass down any pending signaled resumption for other
4832 threads not the current. */
4833 p = append_pending_thread_resumptions (p, endp, ptid);
4835 /* And continue others without a signal. */
4836 append_resumption (p, endp, ptid, /*step=*/ 0, GDB_SIGNAL_0);
4840 /* Scheduler locking; resume only PTID. */
4841 append_resumption (p, endp, ptid, step, siggnal);
4844 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
4849 /* In non-stop, the stub replies to vCont with "OK". The stop
4850 reply will be reported asynchronously by means of a `%Stop'
4852 getpkt (&rs->buf, &rs->buf_size, 0);
4853 if (strcmp (rs->buf, "OK") != 0)
4854 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
4860 /* Tell the remote machine to resume. */
4863 remote_resume (struct target_ops *ops,
4864 ptid_t ptid, int step, enum gdb_signal siggnal)
4866 struct remote_state *rs = get_remote_state ();
4869 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
4870 (explained in remote-notif.c:handle_notification) so
4871 remote_notif_process is not called. We need find a place where
4872 it is safe to start a 'vNotif' sequence. It is good to do it
4873 before resuming inferior, because inferior was stopped and no RSP
4874 traffic at that moment. */
4876 remote_notif_process (rs->notif_state, ¬if_client_stop);
4878 rs->last_sent_signal = siggnal;
4879 rs->last_sent_step = step;
4881 /* The vCont packet doesn't need to specify threads via Hc. */
4882 /* No reverse support (yet) for vCont. */
4883 if (execution_direction != EXEC_REVERSE)
4884 if (remote_vcont_resume (ptid, step, siggnal))
4887 /* All other supported resume packets do use Hc, so set the continue
4889 if (ptid_equal (ptid, minus_one_ptid))
4890 set_continue_thread (any_thread_ptid);
4892 set_continue_thread (ptid);
4895 if (execution_direction == EXEC_REVERSE)
4897 /* We don't pass signals to the target in reverse exec mode. */
4898 if (info_verbose && siggnal != GDB_SIGNAL_0)
4899 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
4902 if (step && packet_support (PACKET_bs) == PACKET_DISABLE)
4903 error (_("Remote reverse-step not supported."));
4904 if (!step && packet_support (PACKET_bc) == PACKET_DISABLE)
4905 error (_("Remote reverse-continue not supported."));
4907 strcpy (buf, step ? "bs" : "bc");
4909 else if (siggnal != GDB_SIGNAL_0)
4911 buf[0] = step ? 'S' : 'C';
4912 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
4913 buf[2] = tohex (((int) siggnal) & 0xf);
4917 strcpy (buf, step ? "s" : "c");
4922 /* We are about to start executing the inferior, let's register it
4923 with the event loop. NOTE: this is the one place where all the
4924 execution commands end up. We could alternatively do this in each
4925 of the execution commands in infcmd.c. */
4926 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
4927 into infcmd.c in order to allow inferior function calls to work
4928 NOT asynchronously. */
4929 if (target_can_async_p ())
4930 target_async (inferior_event_handler, 0);
4932 /* We've just told the target to resume. The remote server will
4933 wait for the inferior to stop, and then send a stop reply. In
4934 the mean time, we can't start another command/query ourselves
4935 because the stub wouldn't be ready to process it. This applies
4936 only to the base all-stop protocol, however. In non-stop (which
4937 only supports vCont), the stub replies with an "OK", and is
4938 immediate able to process further serial input. */
4940 rs->waiting_for_stop_reply = 1;
4944 /* Set up the signal handler for SIGINT, while the target is
4945 executing, ovewriting the 'regular' SIGINT signal handler. */
4947 async_initialize_sigint_signal_handler (void)
4949 signal (SIGINT, async_handle_remote_sigint);
4952 /* Signal handler for SIGINT, while the target is executing. */
4954 async_handle_remote_sigint (int sig)
4956 signal (sig, async_handle_remote_sigint_twice);
4957 /* Note we need to go through gdb_call_async_signal_handler in order
4958 to wake up the event loop on Windows. */
4959 gdb_call_async_signal_handler (async_sigint_remote_token, 0);
4962 /* Signal handler for SIGINT, installed after SIGINT has already been
4963 sent once. It will take effect the second time that the user sends
4966 async_handle_remote_sigint_twice (int sig)
4968 signal (sig, async_handle_remote_sigint);
4969 /* See note in async_handle_remote_sigint. */
4970 gdb_call_async_signal_handler (async_sigint_remote_twice_token, 0);
4973 /* Perform the real interruption of the target execution, in response
4976 async_remote_interrupt (gdb_client_data arg)
4979 fprintf_unfiltered (gdb_stdlog, "async_remote_interrupt called\n");
4981 target_stop (inferior_ptid);
4984 /* Perform interrupt, if the first attempt did not succeed. Just give
4985 up on the target alltogether. */
4987 async_remote_interrupt_twice (gdb_client_data arg)
4990 fprintf_unfiltered (gdb_stdlog, "async_remote_interrupt_twice called\n");
4995 /* Reinstall the usual SIGINT handlers, after the target has
4998 async_cleanup_sigint_signal_handler (void *dummy)
5000 signal (SIGINT, handle_sigint);
5003 /* Send ^C to target to halt it. Target will respond, and send us a
5005 static void (*ofunc) (int);
5007 /* The command line interface's stop routine. This function is installed
5008 as a signal handler for SIGINT. The first time a user requests a
5009 stop, we call remote_stop to send a break or ^C. If there is no
5010 response from the target (it didn't stop when the user requested it),
5011 we ask the user if he'd like to detach from the target. */
5013 sync_remote_interrupt (int signo)
5015 /* If this doesn't work, try more severe steps. */
5016 signal (signo, sync_remote_interrupt_twice);
5018 gdb_call_async_signal_handler (async_sigint_remote_token, 1);
5021 /* The user typed ^C twice. */
5024 sync_remote_interrupt_twice (int signo)
5026 signal (signo, ofunc);
5027 gdb_call_async_signal_handler (async_sigint_remote_twice_token, 1);
5028 signal (signo, sync_remote_interrupt);
5031 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
5032 thread, all threads of a remote process, or all threads of all
5036 remote_stop_ns (ptid_t ptid)
5038 struct remote_state *rs = get_remote_state ();
5040 char *endp = rs->buf + get_remote_packet_size ();
5042 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
5043 remote_vcont_probe (rs);
5045 if (!rs->supports_vCont.t)
5046 error (_("Remote server does not support stopping threads"));
5048 if (ptid_equal (ptid, minus_one_ptid)
5049 || (!remote_multi_process_p (rs) && ptid_is_pid (ptid)))
5050 p += xsnprintf (p, endp - p, "vCont;t");
5055 p += xsnprintf (p, endp - p, "vCont;t:");
5057 if (ptid_is_pid (ptid))
5058 /* All (-1) threads of process. */
5059 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
5062 /* Small optimization: if we already have a stop reply for
5063 this thread, no use in telling the stub we want this
5065 if (peek_stop_reply (ptid))
5071 write_ptid (p, endp, nptid);
5074 /* In non-stop, we get an immediate OK reply. The stop reply will
5075 come in asynchronously by notification. */
5077 getpkt (&rs->buf, &rs->buf_size, 0);
5078 if (strcmp (rs->buf, "OK") != 0)
5079 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
5082 /* All-stop version of target_stop. Sends a break or a ^C to stop the
5083 remote target. It is undefined which thread of which process
5084 reports the stop. */
5087 remote_stop_as (ptid_t ptid)
5089 struct remote_state *rs = get_remote_state ();
5091 rs->ctrlc_pending_p = 1;
5093 /* If the inferior is stopped already, but the core didn't know
5094 about it yet, just ignore the request. The cached wait status
5095 will be collected in remote_wait. */
5096 if (rs->cached_wait_status)
5099 /* Send interrupt_sequence to remote target. */
5100 send_interrupt_sequence ();
5103 /* This is the generic stop called via the target vector. When a target
5104 interrupt is requested, either by the command line or the GUI, we
5105 will eventually end up here. */
5108 remote_stop (struct target_ops *self, ptid_t ptid)
5111 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
5114 remote_stop_ns (ptid);
5116 remote_stop_as (ptid);
5119 /* Ask the user what to do when an interrupt is received. */
5122 interrupt_query (void)
5124 target_terminal_ours ();
5126 if (target_is_async_p ())
5128 signal (SIGINT, handle_sigint);
5133 if (query (_("Interrupted while waiting for the program.\n\
5134 Give up (and stop debugging it)? ")))
5136 remote_unpush_target ();
5141 target_terminal_inferior ();
5144 /* Enable/disable target terminal ownership. Most targets can use
5145 terminal groups to control terminal ownership. Remote targets are
5146 different in that explicit transfer of ownership to/from GDB/target
5150 remote_terminal_inferior (struct target_ops *self)
5152 if (!target_async_permitted)
5153 /* Nothing to do. */
5156 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
5157 idempotent. The event-loop GDB talking to an asynchronous target
5158 with a synchronous command calls this function from both
5159 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
5160 transfer the terminal to the target when it shouldn't this guard
5162 if (!remote_async_terminal_ours_p)
5164 delete_file_handler (input_fd);
5165 remote_async_terminal_ours_p = 0;
5166 async_initialize_sigint_signal_handler ();
5167 /* NOTE: At this point we could also register our selves as the
5168 recipient of all input. Any characters typed could then be
5169 passed on down to the target. */
5173 remote_terminal_ours (struct target_ops *self)
5175 if (!target_async_permitted)
5176 /* Nothing to do. */
5179 /* See FIXME in remote_terminal_inferior. */
5180 if (remote_async_terminal_ours_p)
5182 async_cleanup_sigint_signal_handler (NULL);
5183 add_file_handler (input_fd, stdin_event_handler, 0);
5184 remote_async_terminal_ours_p = 1;
5188 remote_console_output (char *msg)
5192 for (p = msg; p[0] && p[1]; p += 2)
5195 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
5199 fputs_unfiltered (tb, gdb_stdtarg);
5201 gdb_flush (gdb_stdtarg);
5204 typedef struct cached_reg
5207 gdb_byte data[MAX_REGISTER_SIZE];
5210 DEF_VEC_O(cached_reg_t);
5212 typedef struct stop_reply
5214 struct notif_event base;
5216 /* The identifier of the thread about this event */
5219 /* The remote state this event is associated with. When the remote
5220 connection, represented by a remote_state object, is closed,
5221 all the associated stop_reply events should be released. */
5222 struct remote_state *rs;
5224 struct target_waitstatus ws;
5226 /* Expedited registers. This makes remote debugging a bit more
5227 efficient for those targets that provide critical registers as
5228 part of their normal status mechanism (as another roundtrip to
5229 fetch them is avoided). */
5230 VEC(cached_reg_t) *regcache;
5232 enum target_stop_reason stop_reason;
5234 CORE_ADDR watch_data_address;
5239 DECLARE_QUEUE_P (stop_reply_p);
5240 DEFINE_QUEUE_P (stop_reply_p);
5241 /* The list of already fetched and acknowledged stop events. This
5242 queue is used for notification Stop, and other notifications
5243 don't need queue for their events, because the notification events
5244 of Stop can't be consumed immediately, so that events should be
5245 queued first, and be consumed by remote_wait_{ns,as} one per
5246 time. Other notifications can consume their events immediately,
5247 so queue is not needed for them. */
5248 static QUEUE (stop_reply_p) *stop_reply_queue;
5251 stop_reply_xfree (struct stop_reply *r)
5253 notif_event_xfree ((struct notif_event *) r);
5257 remote_notif_stop_parse (struct notif_client *self, char *buf,
5258 struct notif_event *event)
5260 remote_parse_stop_reply (buf, (struct stop_reply *) event);
5264 remote_notif_stop_ack (struct notif_client *self, char *buf,
5265 struct notif_event *event)
5267 struct stop_reply *stop_reply = (struct stop_reply *) event;
5270 putpkt ((char *) self->ack_command);
5272 if (stop_reply->ws.kind == TARGET_WAITKIND_IGNORE)
5273 /* We got an unknown stop reply. */
5274 error (_("Unknown stop reply"));
5276 push_stop_reply (stop_reply);
5280 remote_notif_stop_can_get_pending_events (struct notif_client *self)
5282 /* We can't get pending events in remote_notif_process for
5283 notification stop, and we have to do this in remote_wait_ns
5284 instead. If we fetch all queued events from stub, remote stub
5285 may exit and we have no chance to process them back in
5287 mark_async_event_handler (remote_async_inferior_event_token);
5292 stop_reply_dtr (struct notif_event *event)
5294 struct stop_reply *r = (struct stop_reply *) event;
5296 VEC_free (cached_reg_t, r->regcache);
5299 static struct notif_event *
5300 remote_notif_stop_alloc_reply (void)
5302 struct notif_event *r
5303 = (struct notif_event *) XNEW (struct stop_reply);
5305 r->dtr = stop_reply_dtr;
5310 /* A client of notification Stop. */
5312 struct notif_client notif_client_stop =
5316 remote_notif_stop_parse,
5317 remote_notif_stop_ack,
5318 remote_notif_stop_can_get_pending_events,
5319 remote_notif_stop_alloc_reply,
5323 /* A parameter to pass data in and out. */
5325 struct queue_iter_param
5328 struct stop_reply *output;
5331 /* Remove stop replies in the queue if its pid is equal to the given
5335 remove_stop_reply_for_inferior (QUEUE (stop_reply_p) *q,
5336 QUEUE_ITER (stop_reply_p) *iter,
5340 struct queue_iter_param *param = data;
5341 struct inferior *inf = param->input;
5343 if (ptid_get_pid (event->ptid) == inf->pid)
5345 stop_reply_xfree (event);
5346 QUEUE_remove_elem (stop_reply_p, q, iter);
5352 /* Discard all pending stop replies of inferior INF. */
5355 discard_pending_stop_replies (struct inferior *inf)
5358 struct queue_iter_param param;
5359 struct stop_reply *reply;
5360 struct remote_state *rs = get_remote_state ();
5361 struct remote_notif_state *rns = rs->notif_state;
5363 /* This function can be notified when an inferior exists. When the
5364 target is not remote, the notification state is NULL. */
5365 if (rs->remote_desc == NULL)
5368 reply = (struct stop_reply *) rns->pending_event[notif_client_stop.id];
5370 /* Discard the in-flight notification. */
5371 if (reply != NULL && ptid_get_pid (reply->ptid) == inf->pid)
5373 stop_reply_xfree (reply);
5374 rns->pending_event[notif_client_stop.id] = NULL;
5378 param.output = NULL;
5379 /* Discard the stop replies we have already pulled with
5381 QUEUE_iterate (stop_reply_p, stop_reply_queue,
5382 remove_stop_reply_for_inferior, ¶m);
5385 /* If its remote state is equal to the given remote state,
5386 remove EVENT from the stop reply queue. */
5389 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p) *q,
5390 QUEUE_ITER (stop_reply_p) *iter,
5394 struct queue_iter_param *param = data;
5395 struct remote_state *rs = param->input;
5397 if (event->rs == rs)
5399 stop_reply_xfree (event);
5400 QUEUE_remove_elem (stop_reply_p, q, iter);
5406 /* Discard the stop replies for RS in stop_reply_queue. */
5409 discard_pending_stop_replies_in_queue (struct remote_state *rs)
5411 struct queue_iter_param param;
5414 param.output = NULL;
5415 /* Discard the stop replies we have already pulled with
5417 QUEUE_iterate (stop_reply_p, stop_reply_queue,
5418 remove_stop_reply_of_remote_state, ¶m);
5421 /* A parameter to pass data in and out. */
5424 remote_notif_remove_once_on_match (QUEUE (stop_reply_p) *q,
5425 QUEUE_ITER (stop_reply_p) *iter,
5429 struct queue_iter_param *param = data;
5430 ptid_t *ptid = param->input;
5432 if (ptid_match (event->ptid, *ptid))
5434 param->output = event;
5435 QUEUE_remove_elem (stop_reply_p, q, iter);
5442 /* Remove the first reply in 'stop_reply_queue' which matches
5445 static struct stop_reply *
5446 remote_notif_remove_queued_reply (ptid_t ptid)
5448 struct queue_iter_param param;
5450 param.input = &ptid;
5451 param.output = NULL;
5453 QUEUE_iterate (stop_reply_p, stop_reply_queue,
5454 remote_notif_remove_once_on_match, ¶m);
5456 fprintf_unfiltered (gdb_stdlog,
5457 "notif: discard queued event: 'Stop' in %s\n",
5458 target_pid_to_str (ptid));
5460 return param.output;
5463 /* Look for a queued stop reply belonging to PTID. If one is found,
5464 remove it from the queue, and return it. Returns NULL if none is
5465 found. If there are still queued events left to process, tell the
5466 event loop to get back to target_wait soon. */
5468 static struct stop_reply *
5469 queued_stop_reply (ptid_t ptid)
5471 struct stop_reply *r = remote_notif_remove_queued_reply (ptid);
5473 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
5474 /* There's still at least an event left. */
5475 mark_async_event_handler (remote_async_inferior_event_token);
5480 /* Push a fully parsed stop reply in the stop reply queue. Since we
5481 know that we now have at least one queued event left to pass to the
5482 core side, tell the event loop to get back to target_wait soon. */
5485 push_stop_reply (struct stop_reply *new_event)
5487 QUEUE_enque (stop_reply_p, stop_reply_queue, new_event);
5490 fprintf_unfiltered (gdb_stdlog,
5491 "notif: push 'Stop' %s to queue %d\n",
5492 target_pid_to_str (new_event->ptid),
5493 QUEUE_length (stop_reply_p,
5496 mark_async_event_handler (remote_async_inferior_event_token);
5500 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p) *q,
5501 QUEUE_ITER (stop_reply_p) *iter,
5502 struct stop_reply *event,
5505 ptid_t *ptid = data;
5507 return !(ptid_equal (*ptid, event->ptid)
5508 && event->ws.kind == TARGET_WAITKIND_STOPPED);
5511 /* Returns true if we have a stop reply for PTID. */
5514 peek_stop_reply (ptid_t ptid)
5516 return !QUEUE_iterate (stop_reply_p, stop_reply_queue,
5517 stop_reply_match_ptid_and_ws, &ptid);
5520 /* Skip PACKET until the next semi-colon (or end of string). */
5523 skip_to_semicolon (char *p)
5525 while (*p != '\0' && *p != ';')
5530 /* Parse the stop reply in BUF. Either the function succeeds, and the
5531 result is stored in EVENT, or throws an error. */
5534 remote_parse_stop_reply (char *buf, struct stop_reply *event)
5536 struct remote_arch_state *rsa = get_remote_arch_state ();
5540 event->ptid = null_ptid;
5541 event->rs = get_remote_state ();
5542 event->ws.kind = TARGET_WAITKIND_IGNORE;
5543 event->ws.value.integer = 0;
5544 event->stop_reason = TARGET_STOPPED_BY_NO_REASON;
5545 event->regcache = NULL;
5550 case 'T': /* Status with PC, SP, FP, ... */
5551 /* Expedited reply, containing Signal, {regno, reg} repeat. */
5552 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
5554 n... = register number
5555 r... = register contents
5558 p = &buf[3]; /* after Txx */
5564 p1 = strchr (p, ':');
5566 error (_("Malformed packet(a) (missing colon): %s\n\
5570 error (_("Malformed packet(a) (missing register number): %s\n\
5574 /* Some "registers" are actually extended stop information.
5575 Note if you're adding a new entry here: GDB 7.9 and
5576 earlier assume that all register "numbers" that start
5577 with an hex digit are real register numbers. Make sure
5578 the server only sends such a packet if it knows the
5579 client understands it. */
5581 if (strncmp (p, "thread", p1 - p) == 0)
5582 event->ptid = read_ptid (++p1, &p);
5583 else if ((strncmp (p, "watch", p1 - p) == 0)
5584 || (strncmp (p, "rwatch", p1 - p) == 0)
5585 || (strncmp (p, "awatch", p1 - p) == 0))
5587 event->stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
5588 p = unpack_varlen_hex (++p1, &addr);
5589 event->watch_data_address = (CORE_ADDR) addr;
5591 else if (strncmp (p, "swbreak", p1 - p) == 0)
5593 event->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT;
5595 /* Make sure the stub doesn't forget to indicate support
5597 if (packet_support (PACKET_swbreak_feature) != PACKET_ENABLE)
5598 error (_("Unexpected swbreak stop reason"));
5600 /* The value part is documented as "must be empty",
5601 though we ignore it, in case we ever decide to make
5602 use of it in a backward compatible way. */
5603 p = skip_to_semicolon (p1 + 1);
5605 else if (strncmp (p, "hwbreak", p1 - p) == 0)
5607 event->stop_reason = TARGET_STOPPED_BY_HW_BREAKPOINT;
5609 /* Make sure the stub doesn't forget to indicate support
5611 if (packet_support (PACKET_hwbreak_feature) != PACKET_ENABLE)
5612 error (_("Unexpected hwbreak stop reason"));
5615 p = skip_to_semicolon (p1 + 1);
5617 else if (strncmp (p, "library", p1 - p) == 0)
5619 event->ws.kind = TARGET_WAITKIND_LOADED;
5620 p = skip_to_semicolon (p1 + 1);
5622 else if (strncmp (p, "replaylog", p1 - p) == 0)
5624 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
5625 /* p1 will indicate "begin" or "end", but it makes
5626 no difference for now, so ignore it. */
5627 p = skip_to_semicolon (p1 + 1);
5629 else if (strncmp (p, "core", p1 - p) == 0)
5633 p = unpack_varlen_hex (++p1, &c);
5641 /* Maybe a real ``P'' register number. */
5642 p_temp = unpack_varlen_hex (p, &pnum);
5643 /* If the first invalid character is the colon, we got a
5644 register number. Otherwise, it's an unknown stop
5648 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
5649 cached_reg_t cached_reg;
5652 error (_("Remote sent bad register number %s: %s\n\
5654 hex_string (pnum), p, buf);
5656 cached_reg.num = reg->regnum;
5659 fieldsize = hex2bin (p, cached_reg.data,
5660 register_size (target_gdbarch (),
5663 if (fieldsize < register_size (target_gdbarch (),
5665 warning (_("Remote reply is too short: %s"), buf);
5667 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
5671 /* Not a number. Silently skip unknown optional
5673 p = skip_to_semicolon (p1 + 1);
5678 error (_("Remote register badly formatted: %s\nhere: %s"),
5683 if (event->ws.kind != TARGET_WAITKIND_IGNORE)
5687 case 'S': /* Old style status, just signal only. */
5691 event->ws.kind = TARGET_WAITKIND_STOPPED;
5692 sig = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
5693 if (GDB_SIGNAL_FIRST <= sig && sig < GDB_SIGNAL_LAST)
5694 event->ws.value.sig = (enum gdb_signal) sig;
5696 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
5699 case 'W': /* Target exited. */
5706 /* GDB used to accept only 2 hex chars here. Stubs should
5707 only send more if they detect GDB supports multi-process
5709 p = unpack_varlen_hex (&buf[1], &value);
5713 /* The remote process exited. */
5714 event->ws.kind = TARGET_WAITKIND_EXITED;
5715 event->ws.value.integer = value;
5719 /* The remote process exited with a signal. */
5720 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
5721 if (GDB_SIGNAL_FIRST <= value && value < GDB_SIGNAL_LAST)
5722 event->ws.value.sig = (enum gdb_signal) value;
5724 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
5727 /* If no process is specified, assume inferior_ptid. */
5728 pid = ptid_get_pid (inferior_ptid);
5737 else if (startswith (p, "process:"))
5741 p += sizeof ("process:") - 1;
5742 unpack_varlen_hex (p, &upid);
5746 error (_("unknown stop reply packet: %s"), buf);
5749 error (_("unknown stop reply packet: %s"), buf);
5750 event->ptid = pid_to_ptid (pid);
5755 if (non_stop && ptid_equal (event->ptid, null_ptid))
5756 error (_("No process or thread specified in stop reply: %s"), buf);
5759 /* When the stub wants to tell GDB about a new notification reply, it
5760 sends a notification (%Stop, for example). Those can come it at
5761 any time, hence, we have to make sure that any pending
5762 putpkt/getpkt sequence we're making is finished, before querying
5763 the stub for more events with the corresponding ack command
5764 (vStopped, for example). E.g., if we started a vStopped sequence
5765 immediately upon receiving the notification, something like this
5773 1.6) <-- (registers reply to step #1.3)
5775 Obviously, the reply in step #1.6 would be unexpected to a vStopped
5778 To solve this, whenever we parse a %Stop notification successfully,
5779 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
5780 doing whatever we were doing:
5786 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
5787 2.5) <-- (registers reply to step #2.3)
5789 Eventualy after step #2.5, we return to the event loop, which
5790 notices there's an event on the
5791 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
5792 associated callback --- the function below. At this point, we're
5793 always safe to start a vStopped sequence. :
5796 2.7) <-- T05 thread:2
5802 remote_notif_get_pending_events (struct notif_client *nc)
5804 struct remote_state *rs = get_remote_state ();
5806 if (rs->notif_state->pending_event[nc->id] != NULL)
5809 fprintf_unfiltered (gdb_stdlog,
5810 "notif: process: '%s' ack pending event\n",
5814 nc->ack (nc, rs->buf, rs->notif_state->pending_event[nc->id]);
5815 rs->notif_state->pending_event[nc->id] = NULL;
5819 getpkt (&rs->buf, &rs->buf_size, 0);
5820 if (strcmp (rs->buf, "OK") == 0)
5823 remote_notif_ack (nc, rs->buf);
5829 fprintf_unfiltered (gdb_stdlog,
5830 "notif: process: '%s' no pending reply\n",
5835 /* Called when it is decided that STOP_REPLY holds the info of the
5836 event that is to be returned to the core. This function always
5837 destroys STOP_REPLY. */
5840 process_stop_reply (struct stop_reply *stop_reply,
5841 struct target_waitstatus *status)
5845 *status = stop_reply->ws;
5846 ptid = stop_reply->ptid;
5848 /* If no thread/process was reported by the stub, assume the current
5850 if (ptid_equal (ptid, null_ptid))
5851 ptid = inferior_ptid;
5853 if (status->kind != TARGET_WAITKIND_EXITED
5854 && status->kind != TARGET_WAITKIND_SIGNALLED)
5856 struct remote_state *rs = get_remote_state ();
5858 /* Expedited registers. */
5859 if (stop_reply->regcache)
5861 struct regcache *regcache
5862 = get_thread_arch_regcache (ptid, target_gdbarch ());
5867 VEC_iterate(cached_reg_t, stop_reply->regcache, ix, reg);
5869 regcache_raw_supply (regcache, reg->num, reg->data);
5870 VEC_free (cached_reg_t, stop_reply->regcache);
5873 rs->stop_reason = stop_reply->stop_reason;
5874 rs->remote_watch_data_address = stop_reply->watch_data_address;
5876 remote_notice_new_inferior (ptid, 0);
5877 demand_private_info (ptid)->core = stop_reply->core;
5880 stop_reply_xfree (stop_reply);
5884 /* The non-stop mode version of target_wait. */
5887 remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
5889 struct remote_state *rs = get_remote_state ();
5890 struct stop_reply *stop_reply;
5894 /* If in non-stop mode, get out of getpkt even if a
5895 notification is received. */
5897 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5898 0 /* forever */, &is_notif);
5901 if (ret != -1 && !is_notif)
5904 case 'E': /* Error of some sort. */
5905 /* We're out of sync with the target now. Did it continue
5906 or not? We can't tell which thread it was in non-stop,
5907 so just ignore this. */
5908 warning (_("Remote failure reply: %s"), rs->buf);
5910 case 'O': /* Console output. */
5911 remote_console_output (rs->buf + 1);
5914 warning (_("Invalid remote reply: %s"), rs->buf);
5918 /* Acknowledge a pending stop reply that may have arrived in the
5920 if (rs->notif_state->pending_event[notif_client_stop.id] != NULL)
5921 remote_notif_get_pending_events (¬if_client_stop);
5923 /* If indeed we noticed a stop reply, we're done. */
5924 stop_reply = queued_stop_reply (ptid);
5925 if (stop_reply != NULL)
5926 return process_stop_reply (stop_reply, status);
5928 /* Still no event. If we're just polling for an event, then
5929 return to the event loop. */
5930 if (options & TARGET_WNOHANG)
5932 status->kind = TARGET_WAITKIND_IGNORE;
5933 return minus_one_ptid;
5936 /* Otherwise do a blocking wait. */
5937 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5938 1 /* forever */, &is_notif);
5942 /* Wait until the remote machine stops, then return, storing status in
5943 STATUS just as `wait' would. */
5946 remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options)
5948 struct remote_state *rs = get_remote_state ();
5949 ptid_t event_ptid = null_ptid;
5951 struct stop_reply *stop_reply;
5955 status->kind = TARGET_WAITKIND_IGNORE;
5956 status->value.integer = 0;
5958 stop_reply = queued_stop_reply (ptid);
5959 if (stop_reply != NULL)
5960 return process_stop_reply (stop_reply, status);
5962 if (rs->cached_wait_status)
5963 /* Use the cached wait status, but only once. */
5964 rs->cached_wait_status = 0;
5970 if (!target_is_async_p ())
5972 ofunc = signal (SIGINT, sync_remote_interrupt);
5973 /* If the user hit C-c before this packet, or between packets,
5974 pretend that it was hit right here. */
5975 if (check_quit_flag ())
5978 sync_remote_interrupt (SIGINT);
5982 /* FIXME: cagney/1999-09-27: If we're in async mode we should
5983 _never_ wait for ever -> test on target_is_async_p().
5984 However, before we do that we need to ensure that the caller
5985 knows how to take the target into/out of async mode. */
5986 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5987 wait_forever_enabled_p, &is_notif);
5989 if (!target_is_async_p ())
5990 signal (SIGINT, ofunc);
5992 /* GDB gets a notification. Return to core as this event is
5994 if (ret != -1 && is_notif)
5995 return minus_one_ptid;
6000 rs->stop_reason = TARGET_STOPPED_BY_NO_REASON;
6002 /* We got something. */
6003 rs->waiting_for_stop_reply = 0;
6005 /* Assume that the target has acknowledged Ctrl-C unless we receive
6006 an 'F' or 'O' packet. */
6007 if (buf[0] != 'F' && buf[0] != 'O')
6008 rs->ctrlc_pending_p = 0;
6012 case 'E': /* Error of some sort. */
6013 /* We're out of sync with the target now. Did it continue or
6014 not? Not is more likely, so report a stop. */
6015 warning (_("Remote failure reply: %s"), buf);
6016 status->kind = TARGET_WAITKIND_STOPPED;
6017 status->value.sig = GDB_SIGNAL_0;
6019 case 'F': /* File-I/O request. */
6020 remote_fileio_request (buf, rs->ctrlc_pending_p);
6021 rs->ctrlc_pending_p = 0;
6023 case 'T': case 'S': case 'X': case 'W':
6025 struct stop_reply *stop_reply
6026 = (struct stop_reply *) remote_notif_parse (¬if_client_stop,
6029 event_ptid = process_stop_reply (stop_reply, status);
6032 case 'O': /* Console output. */
6033 remote_console_output (buf + 1);
6035 /* The target didn't really stop; keep waiting. */
6036 rs->waiting_for_stop_reply = 1;
6040 if (rs->last_sent_signal != GDB_SIGNAL_0)
6042 /* Zero length reply means that we tried 'S' or 'C' and the
6043 remote system doesn't support it. */
6044 target_terminal_ours_for_output ();
6046 ("Can't send signals to this remote system. %s not sent.\n",
6047 gdb_signal_to_name (rs->last_sent_signal));
6048 rs->last_sent_signal = GDB_SIGNAL_0;
6049 target_terminal_inferior ();
6051 strcpy ((char *) buf, rs->last_sent_step ? "s" : "c");
6052 putpkt ((char *) buf);
6054 /* We just told the target to resume, so a stop reply is in
6056 rs->waiting_for_stop_reply = 1;
6059 /* else fallthrough */
6061 warning (_("Invalid remote reply: %s"), buf);
6063 rs->waiting_for_stop_reply = 1;
6067 if (status->kind == TARGET_WAITKIND_IGNORE)
6069 /* Nothing interesting happened. If we're doing a non-blocking
6070 poll, we're done. Otherwise, go back to waiting. */
6071 if (options & TARGET_WNOHANG)
6072 return minus_one_ptid;
6076 else if (status->kind != TARGET_WAITKIND_EXITED
6077 && status->kind != TARGET_WAITKIND_SIGNALLED)
6079 if (!ptid_equal (event_ptid, null_ptid))
6080 record_currthread (rs, event_ptid);
6082 event_ptid = inferior_ptid;
6085 /* A process exit. Invalidate our notion of current thread. */
6086 record_currthread (rs, minus_one_ptid);
6091 /* Wait until the remote machine stops, then return, storing status in
6092 STATUS just as `wait' would. */
6095 remote_wait (struct target_ops *ops,
6096 ptid_t ptid, struct target_waitstatus *status, int options)
6101 event_ptid = remote_wait_ns (ptid, status, options);
6103 event_ptid = remote_wait_as (ptid, status, options);
6105 if (target_is_async_p ())
6107 /* If there are are events left in the queue tell the event loop
6109 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
6110 mark_async_event_handler (remote_async_inferior_event_token);
6116 /* Fetch a single register using a 'p' packet. */
6119 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
6121 struct remote_state *rs = get_remote_state ();
6123 char regp[MAX_REGISTER_SIZE];
6126 if (packet_support (PACKET_p) == PACKET_DISABLE)
6129 if (reg->pnum == -1)
6134 p += hexnumstr (p, reg->pnum);
6137 getpkt (&rs->buf, &rs->buf_size, 0);
6141 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
6145 case PACKET_UNKNOWN:
6148 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
6149 gdbarch_register_name (get_regcache_arch (regcache),
6154 /* If this register is unfetchable, tell the regcache. */
6157 regcache_raw_supply (regcache, reg->regnum, NULL);
6161 /* Otherwise, parse and supply the value. */
6167 error (_("fetch_register_using_p: early buf termination"));
6169 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
6172 regcache_raw_supply (regcache, reg->regnum, regp);
6176 /* Fetch the registers included in the target's 'g' packet. */
6179 send_g_packet (void)
6181 struct remote_state *rs = get_remote_state ();
6184 xsnprintf (rs->buf, get_remote_packet_size (), "g");
6185 remote_send (&rs->buf, &rs->buf_size);
6187 /* We can get out of synch in various cases. If the first character
6188 in the buffer is not a hex character, assume that has happened
6189 and try to fetch another packet to read. */
6190 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
6191 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
6192 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
6193 && rs->buf[0] != 'x') /* New: unavailable register value. */
6196 fprintf_unfiltered (gdb_stdlog,
6197 "Bad register packet; fetching a new packet\n");
6198 getpkt (&rs->buf, &rs->buf_size, 0);
6201 buf_len = strlen (rs->buf);
6203 /* Sanity check the received packet. */
6204 if (buf_len % 2 != 0)
6205 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
6211 process_g_packet (struct regcache *regcache)
6213 struct gdbarch *gdbarch = get_regcache_arch (regcache);
6214 struct remote_state *rs = get_remote_state ();
6215 struct remote_arch_state *rsa = get_remote_arch_state ();
6220 buf_len = strlen (rs->buf);
6222 /* Further sanity checks, with knowledge of the architecture. */
6223 if (buf_len > 2 * rsa->sizeof_g_packet)
6224 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
6226 /* Save the size of the packet sent to us by the target. It is used
6227 as a heuristic when determining the max size of packets that the
6228 target can safely receive. */
6229 if (rsa->actual_register_packet_size == 0)
6230 rsa->actual_register_packet_size = buf_len;
6232 /* If this is smaller than we guessed the 'g' packet would be,
6233 update our records. A 'g' reply that doesn't include a register's
6234 value implies either that the register is not available, or that
6235 the 'p' packet must be used. */
6236 if (buf_len < 2 * rsa->sizeof_g_packet)
6238 rsa->sizeof_g_packet = buf_len / 2;
6240 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
6242 if (rsa->regs[i].pnum == -1)
6245 if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
6246 rsa->regs[i].in_g_packet = 0;
6248 rsa->regs[i].in_g_packet = 1;
6252 regs = alloca (rsa->sizeof_g_packet);
6254 /* Unimplemented registers read as all bits zero. */
6255 memset (regs, 0, rsa->sizeof_g_packet);
6257 /* Reply describes registers byte by byte, each byte encoded as two
6258 hex characters. Suck them all up, then supply them to the
6259 register cacheing/storage mechanism. */
6262 for (i = 0; i < rsa->sizeof_g_packet; i++)
6264 if (p[0] == 0 || p[1] == 0)
6265 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
6266 internal_error (__FILE__, __LINE__,
6267 _("unexpected end of 'g' packet reply"));
6269 if (p[0] == 'x' && p[1] == 'x')
6270 regs[i] = 0; /* 'x' */
6272 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
6276 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
6278 struct packet_reg *r = &rsa->regs[i];
6282 if (r->offset * 2 >= strlen (rs->buf))
6283 /* This shouldn't happen - we adjusted in_g_packet above. */
6284 internal_error (__FILE__, __LINE__,
6285 _("unexpected end of 'g' packet reply"));
6286 else if (rs->buf[r->offset * 2] == 'x')
6288 gdb_assert (r->offset * 2 < strlen (rs->buf));
6289 /* The register isn't available, mark it as such (at
6290 the same time setting the value to zero). */
6291 regcache_raw_supply (regcache, r->regnum, NULL);
6294 regcache_raw_supply (regcache, r->regnum,
6301 fetch_registers_using_g (struct regcache *regcache)
6304 process_g_packet (regcache);
6307 /* Make the remote selected traceframe match GDB's selected
6311 set_remote_traceframe (void)
6314 struct remote_state *rs = get_remote_state ();
6316 if (rs->remote_traceframe_number == get_traceframe_number ())
6319 /* Avoid recursion, remote_trace_find calls us again. */
6320 rs->remote_traceframe_number = get_traceframe_number ();
6322 newnum = target_trace_find (tfind_number,
6323 get_traceframe_number (), 0, 0, NULL);
6325 /* Should not happen. If it does, all bets are off. */
6326 if (newnum != get_traceframe_number ())
6327 warning (_("could not set remote traceframe"));
6331 remote_fetch_registers (struct target_ops *ops,
6332 struct regcache *regcache, int regnum)
6334 struct remote_arch_state *rsa = get_remote_arch_state ();
6337 set_remote_traceframe ();
6338 set_general_thread (inferior_ptid);
6342 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
6344 gdb_assert (reg != NULL);
6346 /* If this register might be in the 'g' packet, try that first -
6347 we are likely to read more than one register. If this is the
6348 first 'g' packet, we might be overly optimistic about its
6349 contents, so fall back to 'p'. */
6350 if (reg->in_g_packet)
6352 fetch_registers_using_g (regcache);
6353 if (reg->in_g_packet)
6357 if (fetch_register_using_p (regcache, reg))
6360 /* This register is not available. */
6361 regcache_raw_supply (regcache, reg->regnum, NULL);
6366 fetch_registers_using_g (regcache);
6368 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
6369 if (!rsa->regs[i].in_g_packet)
6370 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
6372 /* This register is not available. */
6373 regcache_raw_supply (regcache, i, NULL);
6377 /* Prepare to store registers. Since we may send them all (using a
6378 'G' request), we have to read out the ones we don't want to change
6382 remote_prepare_to_store (struct target_ops *self, struct regcache *regcache)
6384 struct remote_arch_state *rsa = get_remote_arch_state ();
6386 gdb_byte buf[MAX_REGISTER_SIZE];
6388 /* Make sure the entire registers array is valid. */
6389 switch (packet_support (PACKET_P))
6391 case PACKET_DISABLE:
6392 case PACKET_SUPPORT_UNKNOWN:
6393 /* Make sure all the necessary registers are cached. */
6394 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
6395 if (rsa->regs[i].in_g_packet)
6396 regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
6403 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
6404 packet was not recognized. */
6407 store_register_using_P (const struct regcache *regcache,
6408 struct packet_reg *reg)
6410 struct gdbarch *gdbarch = get_regcache_arch (regcache);
6411 struct remote_state *rs = get_remote_state ();
6412 /* Try storing a single register. */
6413 char *buf = rs->buf;
6414 gdb_byte regp[MAX_REGISTER_SIZE];
6417 if (packet_support (PACKET_P) == PACKET_DISABLE)
6420 if (reg->pnum == -1)
6423 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
6424 p = buf + strlen (buf);
6425 regcache_raw_collect (regcache, reg->regnum, regp);
6426 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
6428 getpkt (&rs->buf, &rs->buf_size, 0);
6430 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
6435 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
6436 gdbarch_register_name (gdbarch, reg->regnum), rs->buf);
6437 case PACKET_UNKNOWN:
6440 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
6444 /* Store register REGNUM, or all registers if REGNUM == -1, from the
6445 contents of the register cache buffer. FIXME: ignores errors. */
6448 store_registers_using_G (const struct regcache *regcache)
6450 struct remote_state *rs = get_remote_state ();
6451 struct remote_arch_state *rsa = get_remote_arch_state ();
6455 /* Extract all the registers in the regcache copying them into a
6460 regs = alloca (rsa->sizeof_g_packet);
6461 memset (regs, 0, rsa->sizeof_g_packet);
6462 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
6464 struct packet_reg *r = &rsa->regs[i];
6467 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
6471 /* Command describes registers byte by byte,
6472 each byte encoded as two hex characters. */
6475 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
6477 bin2hex (regs, p, rsa->sizeof_g_packet);
6479 getpkt (&rs->buf, &rs->buf_size, 0);
6480 if (packet_check_result (rs->buf) == PACKET_ERROR)
6481 error (_("Could not write registers; remote failure reply '%s'"),
6485 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
6486 of the register cache buffer. FIXME: ignores errors. */
6489 remote_store_registers (struct target_ops *ops,
6490 struct regcache *regcache, int regnum)
6492 struct remote_arch_state *rsa = get_remote_arch_state ();
6495 set_remote_traceframe ();
6496 set_general_thread (inferior_ptid);
6500 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
6502 gdb_assert (reg != NULL);
6504 /* Always prefer to store registers using the 'P' packet if
6505 possible; we often change only a small number of registers.
6506 Sometimes we change a larger number; we'd need help from a
6507 higher layer to know to use 'G'. */
6508 if (store_register_using_P (regcache, reg))
6511 /* For now, don't complain if we have no way to write the
6512 register. GDB loses track of unavailable registers too
6513 easily. Some day, this may be an error. We don't have
6514 any way to read the register, either... */
6515 if (!reg->in_g_packet)
6518 store_registers_using_G (regcache);
6522 store_registers_using_G (regcache);
6524 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
6525 if (!rsa->regs[i].in_g_packet)
6526 if (!store_register_using_P (regcache, &rsa->regs[i]))
6527 /* See above for why we do not issue an error here. */
6532 /* Return the number of hex digits in num. */
6535 hexnumlen (ULONGEST num)
6539 for (i = 0; num != 0; i++)
6545 /* Set BUF to the minimum number of hex digits representing NUM. */
6548 hexnumstr (char *buf, ULONGEST num)
6550 int len = hexnumlen (num);
6552 return hexnumnstr (buf, num, len);
6556 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
6559 hexnumnstr (char *buf, ULONGEST num, int width)
6565 for (i = width - 1; i >= 0; i--)
6567 buf[i] = "0123456789abcdef"[(num & 0xf)];
6574 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
6577 remote_address_masked (CORE_ADDR addr)
6579 unsigned int address_size = remote_address_size;
6581 /* If "remoteaddresssize" was not set, default to target address size. */
6583 address_size = gdbarch_addr_bit (target_gdbarch ());
6585 if (address_size > 0
6586 && address_size < (sizeof (ULONGEST) * 8))
6588 /* Only create a mask when that mask can safely be constructed
6589 in a ULONGEST variable. */
6592 mask = (mask << address_size) - 1;
6598 /* Determine whether the remote target supports binary downloading.
6599 This is accomplished by sending a no-op memory write of zero length
6600 to the target at the specified address. It does not suffice to send
6601 the whole packet, since many stubs strip the eighth bit and
6602 subsequently compute a wrong checksum, which causes real havoc with
6605 NOTE: This can still lose if the serial line is not eight-bit
6606 clean. In cases like this, the user should clear "remote
6610 check_binary_download (CORE_ADDR addr)
6612 struct remote_state *rs = get_remote_state ();
6614 switch (packet_support (PACKET_X))
6616 case PACKET_DISABLE:
6620 case PACKET_SUPPORT_UNKNOWN:
6626 p += hexnumstr (p, (ULONGEST) addr);
6628 p += hexnumstr (p, (ULONGEST) 0);
6632 putpkt_binary (rs->buf, (int) (p - rs->buf));
6633 getpkt (&rs->buf, &rs->buf_size, 0);
6635 if (rs->buf[0] == '\0')
6638 fprintf_unfiltered (gdb_stdlog,
6639 "binary downloading NOT "
6640 "supported by target\n");
6641 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
6646 fprintf_unfiltered (gdb_stdlog,
6647 "binary downloading supported by target\n");
6648 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
6655 /* Write memory data directly to the remote machine.
6656 This does not inform the data cache; the data cache uses this.
6657 HEADER is the starting part of the packet.
6658 MEMADDR is the address in the remote memory space.
6659 MYADDR is the address of the buffer in our space.
6660 LEN is the number of bytes.
6661 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
6662 should send data as binary ('X'), or hex-encoded ('M').
6664 The function creates packet of the form
6665 <HEADER><ADDRESS>,<LENGTH>:<DATA>
6667 where encoding of <DATA> is termined by PACKET_FORMAT.
6669 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
6672 Return the transferred status, error or OK (an
6673 'enum target_xfer_status' value). Save the number of bytes
6674 transferred in *XFERED_LEN. Only transfer a single packet. */
6676 static enum target_xfer_status
6677 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
6678 const gdb_byte *myaddr, ULONGEST len,
6679 ULONGEST *xfered_len, char packet_format,
6682 struct remote_state *rs = get_remote_state ();
6692 if (packet_format != 'X' && packet_format != 'M')
6693 internal_error (__FILE__, __LINE__,
6694 _("remote_write_bytes_aux: bad packet format"));
6697 return TARGET_XFER_EOF;
6699 payload_size = get_memory_write_packet_size ();
6701 /* The packet buffer will be large enough for the payload;
6702 get_memory_packet_size ensures this. */
6705 /* Compute the size of the actual payload by subtracting out the
6706 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
6708 payload_size -= strlen ("$,:#NN");
6710 /* The comma won't be used. */
6712 header_length = strlen (header);
6713 payload_size -= header_length;
6714 payload_size -= hexnumlen (memaddr);
6716 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
6718 strcat (rs->buf, header);
6719 p = rs->buf + strlen (header);
6721 /* Compute a best guess of the number of bytes actually transfered. */
6722 if (packet_format == 'X')
6724 /* Best guess at number of bytes that will fit. */
6725 todo = min (len, payload_size);
6727 payload_size -= hexnumlen (todo);
6728 todo = min (todo, payload_size);
6732 /* Num bytes that will fit. */
6733 todo = min (len, payload_size / 2);
6735 payload_size -= hexnumlen (todo);
6736 todo = min (todo, payload_size / 2);
6740 internal_error (__FILE__, __LINE__,
6741 _("minimum packet size too small to write data"));
6743 /* If we already need another packet, then try to align the end
6744 of this packet to a useful boundary. */
6745 if (todo > 2 * REMOTE_ALIGN_WRITES && todo < len)
6746 todo = ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
6748 /* Append "<memaddr>". */
6749 memaddr = remote_address_masked (memaddr);
6750 p += hexnumstr (p, (ULONGEST) memaddr);
6757 /* Append <len>. Retain the location/size of <len>. It may need to
6758 be adjusted once the packet body has been created. */
6760 plenlen = hexnumstr (p, (ULONGEST) todo);
6768 /* Append the packet body. */
6769 if (packet_format == 'X')
6771 /* Binary mode. Send target system values byte by byte, in
6772 increasing byte addresses. Only escape certain critical
6774 payload_length = remote_escape_output (myaddr, todo, (gdb_byte *) p,
6775 &nr_bytes, payload_size);
6777 /* If not all TODO bytes fit, then we'll need another packet. Make
6778 a second try to keep the end of the packet aligned. Don't do
6779 this if the packet is tiny. */
6780 if (nr_bytes < todo && nr_bytes > 2 * REMOTE_ALIGN_WRITES)
6784 new_nr_bytes = (((memaddr + nr_bytes) & ~(REMOTE_ALIGN_WRITES - 1))
6786 if (new_nr_bytes != nr_bytes)
6787 payload_length = remote_escape_output (myaddr, new_nr_bytes,
6788 (gdb_byte *) p, &nr_bytes,
6792 p += payload_length;
6793 if (use_length && nr_bytes < todo)
6795 /* Escape chars have filled up the buffer prematurely,
6796 and we have actually sent fewer bytes than planned.
6797 Fix-up the length field of the packet. Use the same
6798 number of characters as before. */
6799 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
6800 *plen = ':'; /* overwrite \0 from hexnumnstr() */
6805 /* Normal mode: Send target system values byte by byte, in
6806 increasing byte addresses. Each byte is encoded as a two hex
6808 nr_bytes = bin2hex (myaddr, p, todo);
6812 putpkt_binary (rs->buf, (int) (p - rs->buf));
6813 getpkt (&rs->buf, &rs->buf_size, 0);
6815 if (rs->buf[0] == 'E')
6816 return TARGET_XFER_E_IO;
6818 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
6819 fewer bytes than we'd planned. */
6820 *xfered_len = (ULONGEST) nr_bytes;
6821 return TARGET_XFER_OK;
6824 /* Write memory data directly to the remote machine.
6825 This does not inform the data cache; the data cache uses this.
6826 MEMADDR is the address in the remote memory space.
6827 MYADDR is the address of the buffer in our space.
6828 LEN is the number of bytes.
6830 Return the transferred status, error or OK (an
6831 'enum target_xfer_status' value). Save the number of bytes
6832 transferred in *XFERED_LEN. Only transfer a single packet. */
6834 static enum target_xfer_status
6835 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, ULONGEST len,
6836 ULONGEST *xfered_len)
6838 char *packet_format = 0;
6840 /* Check whether the target supports binary download. */
6841 check_binary_download (memaddr);
6843 switch (packet_support (PACKET_X))
6846 packet_format = "X";
6848 case PACKET_DISABLE:
6849 packet_format = "M";
6851 case PACKET_SUPPORT_UNKNOWN:
6852 internal_error (__FILE__, __LINE__,
6853 _("remote_write_bytes: bad internal state"));
6855 internal_error (__FILE__, __LINE__, _("bad switch"));
6858 return remote_write_bytes_aux (packet_format,
6859 memaddr, myaddr, len, xfered_len,
6860 packet_format[0], 1);
6863 /* Read memory data directly from the remote machine.
6864 This does not use the data cache; the data cache uses this.
6865 MEMADDR is the address in the remote memory space.
6866 MYADDR is the address of the buffer in our space.
6867 LEN is the number of bytes.
6869 Return the transferred status, error or OK (an
6870 'enum target_xfer_status' value). Save the number of bytes
6871 transferred in *XFERED_LEN. */
6873 static enum target_xfer_status
6874 remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr, ULONGEST len,
6875 ULONGEST *xfered_len)
6877 struct remote_state *rs = get_remote_state ();
6878 int max_buf_size; /* Max size of packet output buffer. */
6883 max_buf_size = get_memory_read_packet_size ();
6884 /* The packet buffer will be large enough for the payload;
6885 get_memory_packet_size ensures this. */
6887 /* Number if bytes that will fit. */
6888 todo = min (len, max_buf_size / 2);
6890 /* Construct "m"<memaddr>","<len>". */
6891 memaddr = remote_address_masked (memaddr);
6894 p += hexnumstr (p, (ULONGEST) memaddr);
6896 p += hexnumstr (p, (ULONGEST) todo);
6899 getpkt (&rs->buf, &rs->buf_size, 0);
6900 if (rs->buf[0] == 'E'
6901 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
6902 && rs->buf[3] == '\0')
6903 return TARGET_XFER_E_IO;
6904 /* Reply describes memory byte by byte, each byte encoded as two hex
6907 i = hex2bin (p, myaddr, todo);
6908 /* Return what we have. Let higher layers handle partial reads. */
6909 *xfered_len = (ULONGEST) i;
6910 return TARGET_XFER_OK;
6913 /* Using the set of read-only target sections of remote, read live
6916 For interface/parameters/return description see target.h,
6919 static enum target_xfer_status
6920 remote_xfer_live_readonly_partial (struct target_ops *ops, gdb_byte *readbuf,
6921 ULONGEST memaddr, ULONGEST len,
6922 ULONGEST *xfered_len)
6924 struct target_section *secp;
6925 struct target_section_table *table;
6927 secp = target_section_by_addr (ops, memaddr);
6929 && (bfd_get_section_flags (secp->the_bfd_section->owner,
6930 secp->the_bfd_section)
6933 struct target_section *p;
6934 ULONGEST memend = memaddr + len;
6936 table = target_get_section_table (ops);
6938 for (p = table->sections; p < table->sections_end; p++)
6940 if (memaddr >= p->addr)
6942 if (memend <= p->endaddr)
6944 /* Entire transfer is within this section. */
6945 return remote_read_bytes_1 (memaddr, readbuf, len,
6948 else if (memaddr >= p->endaddr)
6950 /* This section ends before the transfer starts. */
6955 /* This section overlaps the transfer. Just do half. */
6956 len = p->endaddr - memaddr;
6957 return remote_read_bytes_1 (memaddr, readbuf, len,
6964 return TARGET_XFER_EOF;
6967 /* Similar to remote_read_bytes_1, but it reads from the remote stub
6968 first if the requested memory is unavailable in traceframe.
6969 Otherwise, fall back to remote_read_bytes_1. */
6971 static enum target_xfer_status
6972 remote_read_bytes (struct target_ops *ops, CORE_ADDR memaddr,
6973 gdb_byte *myaddr, ULONGEST len, ULONGEST *xfered_len)
6976 return TARGET_XFER_EOF;
6978 if (get_traceframe_number () != -1)
6980 VEC(mem_range_s) *available;
6982 /* If we fail to get the set of available memory, then the
6983 target does not support querying traceframe info, and so we
6984 attempt reading from the traceframe anyway (assuming the
6985 target implements the old QTro packet then). */
6986 if (traceframe_available_memory (&available, memaddr, len))
6988 struct cleanup *old_chain;
6990 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
6992 if (VEC_empty (mem_range_s, available)
6993 || VEC_index (mem_range_s, available, 0)->start != memaddr)
6995 enum target_xfer_status res;
6997 /* Don't read into the traceframe's available
6999 if (!VEC_empty (mem_range_s, available))
7001 LONGEST oldlen = len;
7003 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
7004 gdb_assert (len <= oldlen);
7007 do_cleanups (old_chain);
7009 /* This goes through the topmost target again. */
7010 res = remote_xfer_live_readonly_partial (ops, myaddr, memaddr,
7012 if (res == TARGET_XFER_OK)
7013 return TARGET_XFER_OK;
7016 /* No use trying further, we know some memory starting
7017 at MEMADDR isn't available. */
7019 return TARGET_XFER_UNAVAILABLE;
7023 /* Don't try to read more than how much is available, in
7024 case the target implements the deprecated QTro packet to
7025 cater for older GDBs (the target's knowledge of read-only
7026 sections may be outdated by now). */
7027 len = VEC_index (mem_range_s, available, 0)->length;
7029 do_cleanups (old_chain);
7033 return remote_read_bytes_1 (memaddr, myaddr, len, xfered_len);
7038 /* Sends a packet with content determined by the printf format string
7039 FORMAT and the remaining arguments, then gets the reply. Returns
7040 whether the packet was a success, a failure, or unknown. */
7042 static enum packet_result remote_send_printf (const char *format, ...)
7043 ATTRIBUTE_PRINTF (1, 2);
7045 static enum packet_result
7046 remote_send_printf (const char *format, ...)
7048 struct remote_state *rs = get_remote_state ();
7049 int max_size = get_remote_packet_size ();
7052 va_start (ap, format);
7055 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
7056 internal_error (__FILE__, __LINE__, _("Too long remote packet."));
7058 if (putpkt (rs->buf) < 0)
7059 error (_("Communication problem with target."));
7062 getpkt (&rs->buf, &rs->buf_size, 0);
7064 return packet_check_result (rs->buf);
7068 restore_remote_timeout (void *p)
7070 int value = *(int *)p;
7072 remote_timeout = value;
7075 /* Flash writing can take quite some time. We'll set
7076 effectively infinite timeout for flash operations.
7077 In future, we'll need to decide on a better approach. */
7078 static const int remote_flash_timeout = 1000;
7081 remote_flash_erase (struct target_ops *ops,
7082 ULONGEST address, LONGEST length)
7084 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
7085 int saved_remote_timeout = remote_timeout;
7086 enum packet_result ret;
7087 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
7088 &saved_remote_timeout);
7090 remote_timeout = remote_flash_timeout;
7092 ret = remote_send_printf ("vFlashErase:%s,%s",
7093 phex (address, addr_size),
7097 case PACKET_UNKNOWN:
7098 error (_("Remote target does not support flash erase"));
7100 error (_("Error erasing flash with vFlashErase packet"));
7105 do_cleanups (back_to);
7108 static enum target_xfer_status
7109 remote_flash_write (struct target_ops *ops, ULONGEST address,
7110 ULONGEST length, ULONGEST *xfered_len,
7111 const gdb_byte *data)
7113 int saved_remote_timeout = remote_timeout;
7114 enum target_xfer_status ret;
7115 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
7116 &saved_remote_timeout);
7118 remote_timeout = remote_flash_timeout;
7119 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length,
7121 do_cleanups (back_to);
7127 remote_flash_done (struct target_ops *ops)
7129 int saved_remote_timeout = remote_timeout;
7131 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
7132 &saved_remote_timeout);
7134 remote_timeout = remote_flash_timeout;
7135 ret = remote_send_printf ("vFlashDone");
7136 do_cleanups (back_to);
7140 case PACKET_UNKNOWN:
7141 error (_("Remote target does not support vFlashDone"));
7143 error (_("Error finishing flash operation"));
7150 remote_files_info (struct target_ops *ignore)
7152 puts_filtered ("Debugging a target over a serial line.\n");
7155 /* Stuff for dealing with the packets which are part of this protocol.
7156 See comment at top of file for details. */
7158 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
7159 error to higher layers. Called when a serial error is detected.
7160 The exception message is STRING, followed by a colon and a blank,
7161 the system error message for errno at function entry and final dot
7162 for output compatibility with throw_perror_with_name. */
7165 unpush_and_perror (const char *string)
7167 int saved_errno = errno;
7169 remote_unpush_target ();
7170 throw_error (TARGET_CLOSE_ERROR, "%s: %s.", string,
7171 safe_strerror (saved_errno));
7174 /* Read a single character from the remote end. */
7177 readchar (int timeout)
7180 struct remote_state *rs = get_remote_state ();
7182 ch = serial_readchar (rs->remote_desc, timeout);
7187 switch ((enum serial_rc) ch)
7190 remote_unpush_target ();
7191 throw_error (TARGET_CLOSE_ERROR, _("Remote connection closed"));
7194 unpush_and_perror (_("Remote communication error. "
7195 "Target disconnected."));
7197 case SERIAL_TIMEOUT:
7203 /* Wrapper for serial_write that closes the target and throws if
7207 remote_serial_write (const char *str, int len)
7209 struct remote_state *rs = get_remote_state ();
7211 if (serial_write (rs->remote_desc, str, len))
7213 unpush_and_perror (_("Remote communication error. "
7214 "Target disconnected."));
7218 /* Send the command in *BUF to the remote machine, and read the reply
7219 into *BUF. Report an error if we get an error reply. Resize
7220 *BUF using xrealloc if necessary to hold the result, and update
7224 remote_send (char **buf,
7228 getpkt (buf, sizeof_buf, 0);
7230 if ((*buf)[0] == 'E')
7231 error (_("Remote failure reply: %s"), *buf);
7234 /* Return a pointer to an xmalloc'ed string representing an escaped
7235 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
7236 etc. The caller is responsible for releasing the returned
7240 escape_buffer (const char *buf, int n)
7242 struct cleanup *old_chain;
7243 struct ui_file *stb;
7246 stb = mem_fileopen ();
7247 old_chain = make_cleanup_ui_file_delete (stb);
7249 fputstrn_unfiltered (buf, n, '\\', stb);
7250 str = ui_file_xstrdup (stb, NULL);
7251 do_cleanups (old_chain);
7255 /* Display a null-terminated packet on stdout, for debugging, using C
7259 print_packet (const char *buf)
7261 puts_filtered ("\"");
7262 fputstr_filtered (buf, '"', gdb_stdout);
7263 puts_filtered ("\"");
7267 putpkt (const char *buf)
7269 return putpkt_binary (buf, strlen (buf));
7272 /* Send a packet to the remote machine, with error checking. The data
7273 of the packet is in BUF. The string in BUF can be at most
7274 get_remote_packet_size () - 5 to account for the $, # and checksum,
7275 and for a possible /0 if we are debugging (remote_debug) and want
7276 to print the sent packet as a string. */
7279 putpkt_binary (const char *buf, int cnt)
7281 struct remote_state *rs = get_remote_state ();
7283 unsigned char csum = 0;
7284 char *buf2 = alloca (cnt + 6);
7291 /* Catch cases like trying to read memory or listing threads while
7292 we're waiting for a stop reply. The remote server wouldn't be
7293 ready to handle this request, so we'd hang and timeout. We don't
7294 have to worry about this in synchronous mode, because in that
7295 case it's not possible to issue a command while the target is
7296 running. This is not a problem in non-stop mode, because in that
7297 case, the stub is always ready to process serial input. */
7298 if (!non_stop && target_is_async_p () && rs->waiting_for_stop_reply)
7300 error (_("Cannot execute this command while the target is running.\n"
7301 "Use the \"interrupt\" command to stop the target\n"
7302 "and then try again."));
7305 /* We're sending out a new packet. Make sure we don't look at a
7306 stale cached response. */
7307 rs->cached_wait_status = 0;
7309 /* Copy the packet into buffer BUF2, encapsulating it
7310 and giving it a checksum. */
7315 for (i = 0; i < cnt; i++)
7321 *p++ = tohex ((csum >> 4) & 0xf);
7322 *p++ = tohex (csum & 0xf);
7324 /* Send it over and over until we get a positive ack. */
7328 int started_error_output = 0;
7332 struct cleanup *old_chain;
7336 str = escape_buffer (buf2, p - buf2);
7337 old_chain = make_cleanup (xfree, str);
7338 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str);
7339 gdb_flush (gdb_stdlog);
7340 do_cleanups (old_chain);
7342 remote_serial_write (buf2, p - buf2);
7344 /* If this is a no acks version of the remote protocol, send the
7345 packet and move on. */
7349 /* Read until either a timeout occurs (-2) or '+' is read.
7350 Handle any notification that arrives in the mean time. */
7353 ch = readchar (remote_timeout);
7361 case SERIAL_TIMEOUT:
7364 if (started_error_output)
7366 putchar_unfiltered ('\n');
7367 started_error_output = 0;
7376 fprintf_unfiltered (gdb_stdlog, "Ack\n");
7380 fprintf_unfiltered (gdb_stdlog, "Nak\n");
7382 case SERIAL_TIMEOUT:
7386 break; /* Retransmit buffer. */
7390 fprintf_unfiltered (gdb_stdlog,
7391 "Packet instead of Ack, ignoring it\n");
7392 /* It's probably an old response sent because an ACK
7393 was lost. Gobble up the packet and ack it so it
7394 doesn't get retransmitted when we resend this
7397 remote_serial_write ("+", 1);
7398 continue; /* Now, go look for +. */
7405 /* If we got a notification, handle it, and go back to looking
7407 /* We've found the start of a notification. Now
7408 collect the data. */
7409 val = read_frame (&rs->buf, &rs->buf_size);
7414 struct cleanup *old_chain;
7417 str = escape_buffer (rs->buf, val);
7418 old_chain = make_cleanup (xfree, str);
7419 fprintf_unfiltered (gdb_stdlog,
7420 " Notification received: %s\n",
7422 do_cleanups (old_chain);
7424 handle_notification (rs->notif_state, rs->buf);
7425 /* We're in sync now, rewait for the ack. */
7432 if (!started_error_output)
7434 started_error_output = 1;
7435 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
7437 fputc_unfiltered (ch & 0177, gdb_stdlog);
7438 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
7447 if (!started_error_output)
7449 started_error_output = 1;
7450 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
7452 fputc_unfiltered (ch & 0177, gdb_stdlog);
7456 break; /* Here to retransmit. */
7460 /* This is wrong. If doing a long backtrace, the user should be
7461 able to get out next time we call QUIT, without anything as
7462 violent as interrupt_query. If we want to provide a way out of
7463 here without getting to the next QUIT, it should be based on
7464 hitting ^C twice as in remote_wait. */
7475 /* Come here after finding the start of a frame when we expected an
7476 ack. Do our best to discard the rest of this packet. */
7485 c = readchar (remote_timeout);
7488 case SERIAL_TIMEOUT:
7489 /* Nothing we can do. */
7492 /* Discard the two bytes of checksum and stop. */
7493 c = readchar (remote_timeout);
7495 c = readchar (remote_timeout);
7498 case '*': /* Run length encoding. */
7499 /* Discard the repeat count. */
7500 c = readchar (remote_timeout);
7505 /* A regular character. */
7511 /* Come here after finding the start of the frame. Collect the rest
7512 into *BUF, verifying the checksum, length, and handling run-length
7513 compression. NUL terminate the buffer. If there is not enough room,
7514 expand *BUF using xrealloc.
7516 Returns -1 on error, number of characters in buffer (ignoring the
7517 trailing NULL) on success. (could be extended to return one of the
7518 SERIAL status indications). */
7521 read_frame (char **buf_p,
7528 struct remote_state *rs = get_remote_state ();
7535 c = readchar (remote_timeout);
7538 case SERIAL_TIMEOUT:
7540 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
7544 fputs_filtered ("Saw new packet start in middle of old one\n",
7546 return -1; /* Start a new packet, count retries. */
7549 unsigned char pktcsum;
7555 check_0 = readchar (remote_timeout);
7557 check_1 = readchar (remote_timeout);
7559 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
7562 fputs_filtered ("Timeout in checksum, retrying\n",
7566 else if (check_0 < 0 || check_1 < 0)
7569 fputs_filtered ("Communication error in checksum\n",
7574 /* Don't recompute the checksum; with no ack packets we
7575 don't have any way to indicate a packet retransmission
7580 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
7581 if (csum == pktcsum)
7586 struct cleanup *old_chain;
7589 str = escape_buffer (buf, bc);
7590 old_chain = make_cleanup (xfree, str);
7591 fprintf_unfiltered (gdb_stdlog,
7592 "Bad checksum, sentsum=0x%x, "
7593 "csum=0x%x, buf=%s\n",
7594 pktcsum, csum, str);
7595 do_cleanups (old_chain);
7597 /* Number of characters in buffer ignoring trailing
7601 case '*': /* Run length encoding. */
7606 c = readchar (remote_timeout);
7608 repeat = c - ' ' + 3; /* Compute repeat count. */
7610 /* The character before ``*'' is repeated. */
7612 if (repeat > 0 && repeat <= 255 && bc > 0)
7614 if (bc + repeat - 1 >= *sizeof_buf - 1)
7616 /* Make some more room in the buffer. */
7617 *sizeof_buf += repeat;
7618 *buf_p = xrealloc (*buf_p, *sizeof_buf);
7622 memset (&buf[bc], buf[bc - 1], repeat);
7628 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
7632 if (bc >= *sizeof_buf - 1)
7634 /* Make some more room in the buffer. */
7636 *buf_p = xrealloc (*buf_p, *sizeof_buf);
7647 /* Read a packet from the remote machine, with error checking, and
7648 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
7649 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
7650 rather than timing out; this is used (in synchronous mode) to wait
7651 for a target that is is executing user code to stop. */
7652 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
7653 don't have to change all the calls to getpkt to deal with the
7654 return value, because at the moment I don't know what the right
7655 thing to do it for those. */
7663 timed_out = getpkt_sane (buf, sizeof_buf, forever);
7667 /* Read a packet from the remote machine, with error checking, and
7668 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
7669 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
7670 rather than timing out; this is used (in synchronous mode) to wait
7671 for a target that is is executing user code to stop. If FOREVER ==
7672 0, this function is allowed to time out gracefully and return an
7673 indication of this to the caller. Otherwise return the number of
7674 bytes read. If EXPECTING_NOTIF, consider receiving a notification
7675 enough reason to return to the caller. *IS_NOTIF is an output
7676 boolean that indicates whether *BUF holds a notification or not
7677 (a regular packet). */
7680 getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
7681 int expecting_notif, int *is_notif)
7683 struct remote_state *rs = get_remote_state ();
7689 /* We're reading a new response. Make sure we don't look at a
7690 previously cached response. */
7691 rs->cached_wait_status = 0;
7693 strcpy (*buf, "timeout");
7696 timeout = watchdog > 0 ? watchdog : -1;
7697 else if (expecting_notif)
7698 timeout = 0; /* There should already be a char in the buffer. If
7701 timeout = remote_timeout;
7705 /* Process any number of notifications, and then return when
7709 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
7711 for (tries = 1; tries <= MAX_TRIES; tries++)
7713 /* This can loop forever if the remote side sends us
7714 characters continuously, but if it pauses, we'll get
7715 SERIAL_TIMEOUT from readchar because of timeout. Then
7716 we'll count that as a retry.
7718 Note that even when forever is set, we will only wait
7719 forever prior to the start of a packet. After that, we
7720 expect characters to arrive at a brisk pace. They should
7721 show up within remote_timeout intervals. */
7723 c = readchar (timeout);
7724 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
7726 if (c == SERIAL_TIMEOUT)
7728 if (expecting_notif)
7729 return -1; /* Don't complain, it's normal to not get
7730 anything in this case. */
7732 if (forever) /* Watchdog went off? Kill the target. */
7735 remote_unpush_target ();
7736 throw_error (TARGET_CLOSE_ERROR,
7737 _("Watchdog timeout has expired. "
7738 "Target detached."));
7741 fputs_filtered ("Timed out.\n", gdb_stdlog);
7745 /* We've found the start of a packet or notification.
7746 Now collect the data. */
7747 val = read_frame (buf, sizeof_buf);
7752 remote_serial_write ("-", 1);
7755 if (tries > MAX_TRIES)
7757 /* We have tried hard enough, and just can't receive the
7758 packet/notification. Give up. */
7759 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
7761 /* Skip the ack char if we're in no-ack mode. */
7762 if (!rs->noack_mode)
7763 remote_serial_write ("+", 1);
7767 /* If we got an ordinary packet, return that to our caller. */
7772 struct cleanup *old_chain;
7775 str = escape_buffer (*buf, val);
7776 old_chain = make_cleanup (xfree, str);
7777 fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str);
7778 do_cleanups (old_chain);
7781 /* Skip the ack char if we're in no-ack mode. */
7782 if (!rs->noack_mode)
7783 remote_serial_write ("+", 1);
7784 if (is_notif != NULL)
7789 /* If we got a notification, handle it, and go back to looking
7793 gdb_assert (c == '%');
7797 struct cleanup *old_chain;
7800 str = escape_buffer (*buf, val);
7801 old_chain = make_cleanup (xfree, str);
7802 fprintf_unfiltered (gdb_stdlog,
7803 " Notification received: %s\n",
7805 do_cleanups (old_chain);
7807 if (is_notif != NULL)
7810 handle_notification (rs->notif_state, *buf);
7812 /* Notifications require no acknowledgement. */
7814 if (expecting_notif)
7821 getpkt_sane (char **buf, long *sizeof_buf, int forever)
7823 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0, NULL);
7827 getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever,
7830 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1,
7836 remote_kill (struct target_ops *ops)
7838 volatile struct gdb_exception ex;
7840 /* Catch errors so the user can quit from gdb even when we
7841 aren't on speaking terms with the remote system. */
7842 TRY_CATCH (ex, RETURN_MASK_ERROR)
7848 if (ex.error == TARGET_CLOSE_ERROR)
7850 /* If we got an (EOF) error that caused the target
7851 to go away, then we're done, that's what we wanted.
7852 "k" is susceptible to cause a premature EOF, given
7853 that the remote server isn't actually required to
7854 reply to "k", and it can happen that it doesn't
7855 even get to reply ACK to the "k". */
7859 /* Otherwise, something went wrong. We didn't actually kill
7860 the target. Just propagate the exception, and let the
7861 user or higher layers decide what to do. */
7862 throw_exception (ex);
7865 /* We've killed the remote end, we get to mourn it. Since this is
7866 target remote, single-process, mourning the inferior also
7867 unpushes remote_ops. */
7868 target_mourn_inferior ();
7872 remote_vkill (int pid, struct remote_state *rs)
7874 if (packet_support (PACKET_vKill) == PACKET_DISABLE)
7877 /* Tell the remote target to detach. */
7878 xsnprintf (rs->buf, get_remote_packet_size (), "vKill;%x", pid);
7880 getpkt (&rs->buf, &rs->buf_size, 0);
7882 switch (packet_ok (rs->buf,
7883 &remote_protocol_packets[PACKET_vKill]))
7889 case PACKET_UNKNOWN:
7892 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
7897 extended_remote_kill (struct target_ops *ops)
7900 int pid = ptid_get_pid (inferior_ptid);
7901 struct remote_state *rs = get_remote_state ();
7903 res = remote_vkill (pid, rs);
7904 if (res == -1 && !(rs->extended && remote_multi_process_p (rs)))
7906 /* Don't try 'k' on a multi-process aware stub -- it has no way
7907 to specify the pid. */
7911 getpkt (&rs->buf, &rs->buf_size, 0);
7912 if (rs->buf[0] != 'O' || rs->buf[0] != 'K')
7915 /* Don't wait for it to die. I'm not really sure it matters whether
7916 we do or not. For the existing stubs, kill is a noop. */
7922 error (_("Can't kill process"));
7924 target_mourn_inferior ();
7928 remote_mourn (struct target_ops *ops)
7930 remote_mourn_1 (ops);
7933 /* Worker function for remote_mourn. */
7935 remote_mourn_1 (struct target_ops *target)
7937 unpush_target (target);
7939 /* remote_close takes care of doing most of the clean up. */
7940 generic_mourn_inferior ();
7944 extended_remote_mourn_1 (struct target_ops *target)
7946 struct remote_state *rs = get_remote_state ();
7948 /* In case we got here due to an error, but we're going to stay
7950 rs->waiting_for_stop_reply = 0;
7952 /* If the current general thread belonged to the process we just
7953 detached from or has exited, the remote side current general
7954 thread becomes undefined. Considering a case like this:
7956 - We just got here due to a detach.
7957 - The process that we're detaching from happens to immediately
7958 report a global breakpoint being hit in non-stop mode, in the
7959 same thread we had selected before.
7960 - GDB attaches to this process again.
7961 - This event happens to be the next event we handle.
7963 GDB would consider that the current general thread didn't need to
7964 be set on the stub side (with Hg), since for all it knew,
7965 GENERAL_THREAD hadn't changed.
7967 Notice that although in all-stop mode, the remote server always
7968 sets the current thread to the thread reporting the stop event,
7969 that doesn't happen in non-stop mode; in non-stop, the stub *must
7970 not* change the current thread when reporting a breakpoint hit,
7971 due to the decoupling of event reporting and event handling.
7973 To keep things simple, we always invalidate our notion of the
7975 record_currthread (rs, minus_one_ptid);
7977 /* Unlike "target remote", we do not want to unpush the target; then
7978 the next time the user says "run", we won't be connected. */
7980 /* Call common code to mark the inferior as not running. */
7981 generic_mourn_inferior ();
7983 if (!have_inferiors ())
7985 if (!remote_multi_process_p (rs))
7987 /* Check whether the target is running now - some remote stubs
7988 automatically restart after kill. */
7990 getpkt (&rs->buf, &rs->buf_size, 0);
7992 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
7994 /* Assume that the target has been restarted. Set
7995 inferior_ptid so that bits of core GDB realizes
7996 there's something here, e.g., so that the user can
7997 say "kill" again. */
7998 inferior_ptid = magic_null_ptid;
8005 extended_remote_mourn (struct target_ops *ops)
8007 extended_remote_mourn_1 (ops);
8011 extended_remote_supports_disable_randomization (struct target_ops *self)
8013 return packet_support (PACKET_QDisableRandomization) == PACKET_ENABLE;
8017 extended_remote_disable_randomization (int val)
8019 struct remote_state *rs = get_remote_state ();
8022 xsnprintf (rs->buf, get_remote_packet_size (), "QDisableRandomization:%x",
8025 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
8027 error (_("Target does not support QDisableRandomization."));
8028 if (strcmp (reply, "OK") != 0)
8029 error (_("Bogus QDisableRandomization reply from target: %s"), reply);
8033 extended_remote_run (char *args)
8035 struct remote_state *rs = get_remote_state ();
8038 /* If the user has disabled vRun support, or we have detected that
8039 support is not available, do not try it. */
8040 if (packet_support (PACKET_vRun) == PACKET_DISABLE)
8043 strcpy (rs->buf, "vRun;");
8044 len = strlen (rs->buf);
8046 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
8047 error (_("Remote file name too long for run packet"));
8048 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len,
8049 strlen (remote_exec_file));
8051 gdb_assert (args != NULL);
8054 struct cleanup *back_to;
8058 argv = gdb_buildargv (args);
8059 back_to = make_cleanup_freeargv (argv);
8060 for (i = 0; argv[i] != NULL; i++)
8062 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
8063 error (_("Argument list too long for run packet"));
8064 rs->buf[len++] = ';';
8065 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len,
8068 do_cleanups (back_to);
8071 rs->buf[len++] = '\0';
8074 getpkt (&rs->buf, &rs->buf_size, 0);
8076 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]))
8079 /* We have a wait response. All is well. */
8081 case PACKET_UNKNOWN:
8084 if (remote_exec_file[0] == '\0')
8085 error (_("Running the default executable on the remote target failed; "
8086 "try \"set remote exec-file\"?"));
8088 error (_("Running \"%s\" on the remote target failed"),
8091 gdb_assert_not_reached (_("bad switch"));
8095 /* In the extended protocol we want to be able to do things like
8096 "run" and have them basically work as expected. So we need
8097 a special create_inferior function. We support changing the
8098 executable file and the command line arguments, but not the
8102 extended_remote_create_inferior (struct target_ops *ops,
8103 char *exec_file, char *args,
8104 char **env, int from_tty)
8108 struct remote_state *rs = get_remote_state ();
8110 /* If running asynchronously, register the target file descriptor
8111 with the event loop. */
8112 if (target_can_async_p ())
8113 target_async (inferior_event_handler, 0);
8115 /* Disable address space randomization if requested (and supported). */
8116 if (extended_remote_supports_disable_randomization (ops))
8117 extended_remote_disable_randomization (disable_randomization);
8119 /* Now restart the remote server. */
8120 run_worked = extended_remote_run (args) != -1;
8123 /* vRun was not supported. Fail if we need it to do what the
8125 if (remote_exec_file[0])
8126 error (_("Remote target does not support \"set remote exec-file\""));
8128 error (_("Remote target does not support \"set args\" or run <ARGS>"));
8130 /* Fall back to "R". */
8131 extended_remote_restart ();
8134 if (!have_inferiors ())
8136 /* Clean up from the last time we ran, before we mark the target
8137 running again. This will mark breakpoints uninserted, and
8138 get_offsets may insert breakpoints. */
8139 init_thread_list ();
8140 init_wait_for_inferior ();
8143 /* vRun's success return is a stop reply. */
8144 stop_reply = run_worked ? rs->buf : NULL;
8145 add_current_inferior_and_thread (stop_reply);
8147 /* Get updated offsets, if the stub uses qOffsets. */
8152 /* Given a location's target info BP_TGT and the packet buffer BUF, output
8153 the list of conditions (in agent expression bytecode format), if any, the
8154 target needs to evaluate. The output is placed into the packet buffer
8155 started from BUF and ended at BUF_END. */
8158 remote_add_target_side_condition (struct gdbarch *gdbarch,
8159 struct bp_target_info *bp_tgt, char *buf,
8162 struct agent_expr *aexpr = NULL;
8165 char *buf_start = buf;
8167 if (VEC_empty (agent_expr_p, bp_tgt->conditions))
8170 buf += strlen (buf);
8171 xsnprintf (buf, buf_end - buf, "%s", ";");
8174 /* Send conditions to the target and free the vector. */
8176 VEC_iterate (agent_expr_p, bp_tgt->conditions, ix, aexpr);
8179 xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len);
8180 buf += strlen (buf);
8181 for (i = 0; i < aexpr->len; ++i)
8182 buf = pack_hex_byte (buf, aexpr->buf[i]);
8189 remote_add_target_side_commands (struct gdbarch *gdbarch,
8190 struct bp_target_info *bp_tgt, char *buf)
8192 struct agent_expr *aexpr = NULL;
8195 if (VEC_empty (agent_expr_p, bp_tgt->tcommands))
8198 buf += strlen (buf);
8200 sprintf (buf, ";cmds:%x,", bp_tgt->persist);
8201 buf += strlen (buf);
8203 /* Concatenate all the agent expressions that are commands into the
8206 VEC_iterate (agent_expr_p, bp_tgt->tcommands, ix, aexpr);
8209 sprintf (buf, "X%x,", aexpr->len);
8210 buf += strlen (buf);
8211 for (i = 0; i < aexpr->len; ++i)
8212 buf = pack_hex_byte (buf, aexpr->buf[i]);
8217 /* Insert a breakpoint. On targets that have software breakpoint
8218 support, we ask the remote target to do the work; on targets
8219 which don't, we insert a traditional memory breakpoint. */
8222 remote_insert_breakpoint (struct target_ops *ops,
8223 struct gdbarch *gdbarch,
8224 struct bp_target_info *bp_tgt)
8226 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
8227 If it succeeds, then set the support to PACKET_ENABLE. If it
8228 fails, and the user has explicitly requested the Z support then
8229 report an error, otherwise, mark it disabled and go on. */
8231 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
8233 CORE_ADDR addr = bp_tgt->reqstd_address;
8234 struct remote_state *rs;
8237 struct condition_list *cond = NULL;
8239 /* Make sure the remote is pointing at the right process, if
8241 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
8242 set_general_process ();
8244 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
8246 rs = get_remote_state ();
8248 endbuf = rs->buf + get_remote_packet_size ();
8253 addr = (ULONGEST) remote_address_masked (addr);
8254 p += hexnumstr (p, addr);
8255 xsnprintf (p, endbuf - p, ",%d", bpsize);
8257 if (remote_supports_cond_breakpoints (ops))
8258 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
8260 if (remote_can_run_breakpoint_commands (ops))
8261 remote_add_target_side_commands (gdbarch, bp_tgt, p);
8264 getpkt (&rs->buf, &rs->buf_size, 0);
8266 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
8271 bp_tgt->placed_address = addr;
8272 bp_tgt->placed_size = bpsize;
8274 case PACKET_UNKNOWN:
8279 /* If this breakpoint has target-side commands but this stub doesn't
8280 support Z0 packets, throw error. */
8281 if (!VEC_empty (agent_expr_p, bp_tgt->tcommands))
8282 throw_error (NOT_SUPPORTED_ERROR, _("\
8283 Target doesn't support breakpoints that have target side commands."));
8285 return memory_insert_breakpoint (ops, gdbarch, bp_tgt);
8289 remote_remove_breakpoint (struct target_ops *ops,
8290 struct gdbarch *gdbarch,
8291 struct bp_target_info *bp_tgt)
8293 CORE_ADDR addr = bp_tgt->placed_address;
8294 struct remote_state *rs = get_remote_state ();
8296 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
8299 char *endbuf = rs->buf + get_remote_packet_size ();
8301 /* Make sure the remote is pointing at the right process, if
8303 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
8304 set_general_process ();
8310 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
8311 p += hexnumstr (p, addr);
8312 xsnprintf (p, endbuf - p, ",%d", bp_tgt->placed_size);
8315 getpkt (&rs->buf, &rs->buf_size, 0);
8317 return (rs->buf[0] == 'E');
8320 return memory_remove_breakpoint (ops, gdbarch, bp_tgt);
8324 watchpoint_to_Z_packet (int type)
8329 return Z_PACKET_WRITE_WP;
8332 return Z_PACKET_READ_WP;
8335 return Z_PACKET_ACCESS_WP;
8338 internal_error (__FILE__, __LINE__,
8339 _("hw_bp_to_z: bad watchpoint type %d"), type);
8344 remote_insert_watchpoint (struct target_ops *self,
8345 CORE_ADDR addr, int len, int type,
8346 struct expression *cond)
8348 struct remote_state *rs = get_remote_state ();
8349 char *endbuf = rs->buf + get_remote_packet_size ();
8351 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
8353 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
8356 /* Make sure the remote is pointing at the right process, if
8358 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
8359 set_general_process ();
8361 xsnprintf (rs->buf, endbuf - rs->buf, "Z%x,", packet);
8362 p = strchr (rs->buf, '\0');
8363 addr = remote_address_masked (addr);
8364 p += hexnumstr (p, (ULONGEST) addr);
8365 xsnprintf (p, endbuf - p, ",%x", len);
8368 getpkt (&rs->buf, &rs->buf_size, 0);
8370 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
8374 case PACKET_UNKNOWN:
8379 internal_error (__FILE__, __LINE__,
8380 _("remote_insert_watchpoint: reached end of function"));
8384 remote_watchpoint_addr_within_range (struct target_ops *target, CORE_ADDR addr,
8385 CORE_ADDR start, int length)
8387 CORE_ADDR diff = remote_address_masked (addr - start);
8389 return diff < length;
8394 remote_remove_watchpoint (struct target_ops *self,
8395 CORE_ADDR addr, int len, int type,
8396 struct expression *cond)
8398 struct remote_state *rs = get_remote_state ();
8399 char *endbuf = rs->buf + get_remote_packet_size ();
8401 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
8403 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
8406 /* Make sure the remote is pointing at the right process, if
8408 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
8409 set_general_process ();
8411 xsnprintf (rs->buf, endbuf - rs->buf, "z%x,", packet);
8412 p = strchr (rs->buf, '\0');
8413 addr = remote_address_masked (addr);
8414 p += hexnumstr (p, (ULONGEST) addr);
8415 xsnprintf (p, endbuf - p, ",%x", len);
8417 getpkt (&rs->buf, &rs->buf_size, 0);
8419 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
8422 case PACKET_UNKNOWN:
8427 internal_error (__FILE__, __LINE__,
8428 _("remote_remove_watchpoint: reached end of function"));
8432 int remote_hw_watchpoint_limit = -1;
8433 int remote_hw_watchpoint_length_limit = -1;
8434 int remote_hw_breakpoint_limit = -1;
8437 remote_region_ok_for_hw_watchpoint (struct target_ops *self,
8438 CORE_ADDR addr, int len)
8440 if (remote_hw_watchpoint_length_limit == 0)
8442 else if (remote_hw_watchpoint_length_limit < 0)
8444 else if (len <= remote_hw_watchpoint_length_limit)
8451 remote_check_watch_resources (struct target_ops *self,
8452 int type, int cnt, int ot)
8454 if (type == bp_hardware_breakpoint)
8456 if (remote_hw_breakpoint_limit == 0)
8458 else if (remote_hw_breakpoint_limit < 0)
8460 else if (cnt <= remote_hw_breakpoint_limit)
8465 if (remote_hw_watchpoint_limit == 0)
8467 else if (remote_hw_watchpoint_limit < 0)
8471 else if (cnt <= remote_hw_watchpoint_limit)
8477 /* The to_stopped_by_sw_breakpoint method of target remote. */
8480 remote_stopped_by_sw_breakpoint (struct target_ops *ops)
8482 struct remote_state *rs = get_remote_state ();
8484 return rs->stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT;
8487 /* The to_supports_stopped_by_sw_breakpoint method of target
8491 remote_supports_stopped_by_sw_breakpoint (struct target_ops *ops)
8493 struct remote_state *rs = get_remote_state ();
8495 return (packet_support (PACKET_swbreak_feature) == PACKET_ENABLE);
8498 /* The to_stopped_by_hw_breakpoint method of target remote. */
8501 remote_stopped_by_hw_breakpoint (struct target_ops *ops)
8503 struct remote_state *rs = get_remote_state ();
8505 return rs->stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT;
8508 /* The to_supports_stopped_by_hw_breakpoint method of target
8512 remote_supports_stopped_by_hw_breakpoint (struct target_ops *ops)
8514 struct remote_state *rs = get_remote_state ();
8516 return (packet_support (PACKET_hwbreak_feature) == PACKET_ENABLE);
8520 remote_stopped_by_watchpoint (struct target_ops *ops)
8522 struct remote_state *rs = get_remote_state ();
8524 return rs->stop_reason == TARGET_STOPPED_BY_WATCHPOINT;
8528 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
8530 struct remote_state *rs = get_remote_state ();
8533 if (remote_stopped_by_watchpoint (target))
8535 *addr_p = rs->remote_watch_data_address;
8544 remote_insert_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
8545 struct bp_target_info *bp_tgt)
8547 CORE_ADDR addr = bp_tgt->reqstd_address;
8548 struct remote_state *rs;
8553 /* The length field should be set to the size of a breakpoint
8554 instruction, even though we aren't inserting one ourselves. */
8556 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
8558 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
8561 /* Make sure the remote is pointing at the right process, if
8563 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
8564 set_general_process ();
8566 rs = get_remote_state ();
8568 endbuf = rs->buf + get_remote_packet_size ();
8574 addr = remote_address_masked (addr);
8575 p += hexnumstr (p, (ULONGEST) addr);
8576 xsnprintf (p, endbuf - p, ",%x", bpsize);
8578 if (remote_supports_cond_breakpoints (self))
8579 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
8581 if (remote_can_run_breakpoint_commands (self))
8582 remote_add_target_side_commands (gdbarch, bp_tgt, p);
8585 getpkt (&rs->buf, &rs->buf_size, 0);
8587 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
8590 if (rs->buf[1] == '.')
8592 message = strchr (rs->buf + 2, '.');
8594 error (_("Remote failure reply: %s"), message + 1);
8597 case PACKET_UNKNOWN:
8600 bp_tgt->placed_address = addr;
8601 bp_tgt->placed_size = bpsize;
8604 internal_error (__FILE__, __LINE__,
8605 _("remote_insert_hw_breakpoint: reached end of function"));
8610 remote_remove_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
8611 struct bp_target_info *bp_tgt)
8614 struct remote_state *rs = get_remote_state ();
8616 char *endbuf = rs->buf + get_remote_packet_size ();
8618 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
8621 /* Make sure the remote is pointing at the right process, if
8623 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
8624 set_general_process ();
8630 addr = remote_address_masked (bp_tgt->placed_address);
8631 p += hexnumstr (p, (ULONGEST) addr);
8632 xsnprintf (p, endbuf - p, ",%x", bp_tgt->placed_size);
8635 getpkt (&rs->buf, &rs->buf_size, 0);
8637 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
8640 case PACKET_UNKNOWN:
8645 internal_error (__FILE__, __LINE__,
8646 _("remote_remove_hw_breakpoint: reached end of function"));
8649 /* Verify memory using the "qCRC:" request. */
8652 remote_verify_memory (struct target_ops *ops,
8653 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
8655 struct remote_state *rs = get_remote_state ();
8656 unsigned long host_crc, target_crc;
8659 /* It doesn't make sense to use qCRC if the remote target is
8660 connected but not running. */
8661 if (target_has_execution && packet_support (PACKET_qCRC) != PACKET_DISABLE)
8663 enum packet_result result;
8665 /* Make sure the remote is pointing at the right process. */
8666 set_general_process ();
8668 /* FIXME: assumes lma can fit into long. */
8669 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
8670 (long) lma, (long) size);
8673 /* Be clever; compute the host_crc before waiting for target
8675 host_crc = xcrc32 (data, size, 0xffffffff);
8677 getpkt (&rs->buf, &rs->buf_size, 0);
8679 result = packet_ok (rs->buf,
8680 &remote_protocol_packets[PACKET_qCRC]);
8681 if (result == PACKET_ERROR)
8683 else if (result == PACKET_OK)
8685 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
8686 target_crc = target_crc * 16 + fromhex (*tmp);
8688 return (host_crc == target_crc);
8692 return simple_verify_memory (ops, data, lma, size);
8695 /* compare-sections command
8697 With no arguments, compares each loadable section in the exec bfd
8698 with the same memory range on the target, and reports mismatches.
8699 Useful for verifying the image on the target against the exec file. */
8702 compare_sections_command (char *args, int from_tty)
8705 struct cleanup *old_chain;
8707 const char *sectname;
8716 error (_("command cannot be used without an exec file"));
8718 /* Make sure the remote is pointing at the right process. */
8719 set_general_process ();
8721 if (args != NULL && strcmp (args, "-r") == 0)
8727 for (s = exec_bfd->sections; s; s = s->next)
8729 if (!(s->flags & SEC_LOAD))
8730 continue; /* Skip non-loadable section. */
8732 if (read_only && (s->flags & SEC_READONLY) == 0)
8733 continue; /* Skip writeable sections */
8735 size = bfd_get_section_size (s);
8737 continue; /* Skip zero-length section. */
8739 sectname = bfd_get_section_name (exec_bfd, s);
8740 if (args && strcmp (args, sectname) != 0)
8741 continue; /* Not the section selected by user. */
8743 matched = 1; /* Do this section. */
8746 sectdata = xmalloc (size);
8747 old_chain = make_cleanup (xfree, sectdata);
8748 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
8750 res = target_verify_memory (sectdata, lma, size);
8753 error (_("target memory fault, section %s, range %s -- %s"), sectname,
8754 paddress (target_gdbarch (), lma),
8755 paddress (target_gdbarch (), lma + size));
8757 printf_filtered ("Section %s, range %s -- %s: ", sectname,
8758 paddress (target_gdbarch (), lma),
8759 paddress (target_gdbarch (), lma + size));
8761 printf_filtered ("matched.\n");
8764 printf_filtered ("MIS-MATCHED!\n");
8768 do_cleanups (old_chain);
8771 warning (_("One or more sections of the target image does not match\n\
8772 the loaded file\n"));
8773 if (args && !matched)
8774 printf_filtered (_("No loaded section named '%s'.\n"), args);
8777 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
8778 into remote target. The number of bytes written to the remote
8779 target is returned, or -1 for error. */
8781 static enum target_xfer_status
8782 remote_write_qxfer (struct target_ops *ops, const char *object_name,
8783 const char *annex, const gdb_byte *writebuf,
8784 ULONGEST offset, LONGEST len, ULONGEST *xfered_len,
8785 struct packet_config *packet)
8789 struct remote_state *rs = get_remote_state ();
8790 int max_size = get_memory_write_packet_size ();
8792 if (packet->support == PACKET_DISABLE)
8793 return TARGET_XFER_E_IO;
8795 /* Insert header. */
8796 i = snprintf (rs->buf, max_size,
8797 "qXfer:%s:write:%s:%s:",
8798 object_name, annex ? annex : "",
8799 phex_nz (offset, sizeof offset));
8800 max_size -= (i + 1);
8802 /* Escape as much data as fits into rs->buf. */
8803 buf_len = remote_escape_output
8804 (writebuf, len, (gdb_byte *) rs->buf + i, &max_size, max_size);
8806 if (putpkt_binary (rs->buf, i + buf_len) < 0
8807 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
8808 || packet_ok (rs->buf, packet) != PACKET_OK)
8809 return TARGET_XFER_E_IO;
8811 unpack_varlen_hex (rs->buf, &n);
8814 return TARGET_XFER_OK;
8817 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
8818 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
8819 number of bytes read is returned, or 0 for EOF, or -1 for error.
8820 The number of bytes read may be less than LEN without indicating an
8821 EOF. PACKET is checked and updated to indicate whether the remote
8822 target supports this object. */
8824 static enum target_xfer_status
8825 remote_read_qxfer (struct target_ops *ops, const char *object_name,
8827 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
8828 ULONGEST *xfered_len,
8829 struct packet_config *packet)
8831 struct remote_state *rs = get_remote_state ();
8832 LONGEST i, n, packet_len;
8834 if (packet->support == PACKET_DISABLE)
8835 return TARGET_XFER_E_IO;
8837 /* Check whether we've cached an end-of-object packet that matches
8839 if (rs->finished_object)
8841 if (strcmp (object_name, rs->finished_object) == 0
8842 && strcmp (annex ? annex : "", rs->finished_annex) == 0
8843 && offset == rs->finished_offset)
8844 return TARGET_XFER_EOF;
8847 /* Otherwise, we're now reading something different. Discard
8849 xfree (rs->finished_object);
8850 xfree (rs->finished_annex);
8851 rs->finished_object = NULL;
8852 rs->finished_annex = NULL;
8855 /* Request only enough to fit in a single packet. The actual data
8856 may not, since we don't know how much of it will need to be escaped;
8857 the target is free to respond with slightly less data. We subtract
8858 five to account for the response type and the protocol frame. */
8859 n = min (get_remote_packet_size () - 5, len);
8860 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
8861 object_name, annex ? annex : "",
8862 phex_nz (offset, sizeof offset),
8863 phex_nz (n, sizeof n));
8864 i = putpkt (rs->buf);
8866 return TARGET_XFER_E_IO;
8869 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
8870 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
8871 return TARGET_XFER_E_IO;
8873 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
8874 error (_("Unknown remote qXfer reply: %s"), rs->buf);
8876 /* 'm' means there is (or at least might be) more data after this
8877 batch. That does not make sense unless there's at least one byte
8878 of data in this reply. */
8879 if (rs->buf[0] == 'm' && packet_len == 1)
8880 error (_("Remote qXfer reply contained no data."));
8882 /* Got some data. */
8883 i = remote_unescape_input ((gdb_byte *) rs->buf + 1,
8884 packet_len - 1, readbuf, n);
8886 /* 'l' is an EOF marker, possibly including a final block of data,
8887 or possibly empty. If we have the final block of a non-empty
8888 object, record this fact to bypass a subsequent partial read. */
8889 if (rs->buf[0] == 'l' && offset + i > 0)
8891 rs->finished_object = xstrdup (object_name);
8892 rs->finished_annex = xstrdup (annex ? annex : "");
8893 rs->finished_offset = offset + i;
8897 return TARGET_XFER_EOF;
8901 return TARGET_XFER_OK;
8905 static enum target_xfer_status
8906 remote_xfer_partial (struct target_ops *ops, enum target_object object,
8907 const char *annex, gdb_byte *readbuf,
8908 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
8909 ULONGEST *xfered_len)
8911 struct remote_state *rs;
8916 set_remote_traceframe ();
8917 set_general_thread (inferior_ptid);
8919 rs = get_remote_state ();
8921 /* Handle memory using the standard memory routines. */
8922 if (object == TARGET_OBJECT_MEMORY)
8924 /* If the remote target is connected but not running, we should
8925 pass this request down to a lower stratum (e.g. the executable
8927 if (!target_has_execution)
8928 return TARGET_XFER_EOF;
8930 if (writebuf != NULL)
8931 return remote_write_bytes (offset, writebuf, len, xfered_len);
8933 return remote_read_bytes (ops, offset, readbuf, len, xfered_len);
8936 /* Handle SPU memory using qxfer packets. */
8937 if (object == TARGET_OBJECT_SPU)
8940 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
8941 xfered_len, &remote_protocol_packets
8942 [PACKET_qXfer_spu_read]);
8944 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
8945 xfered_len, &remote_protocol_packets
8946 [PACKET_qXfer_spu_write]);
8949 /* Handle extra signal info using qxfer packets. */
8950 if (object == TARGET_OBJECT_SIGNAL_INFO)
8953 return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len,
8954 xfered_len, &remote_protocol_packets
8955 [PACKET_qXfer_siginfo_read]);
8957 return remote_write_qxfer (ops, "siginfo", annex,
8958 writebuf, offset, len, xfered_len,
8959 &remote_protocol_packets
8960 [PACKET_qXfer_siginfo_write]);
8963 if (object == TARGET_OBJECT_STATIC_TRACE_DATA)
8966 return remote_read_qxfer (ops, "statictrace", annex,
8967 readbuf, offset, len, xfered_len,
8968 &remote_protocol_packets
8969 [PACKET_qXfer_statictrace_read]);
8971 return TARGET_XFER_E_IO;
8974 /* Only handle flash writes. */
8975 if (writebuf != NULL)
8981 case TARGET_OBJECT_FLASH:
8982 return remote_flash_write (ops, offset, len, xfered_len,
8986 return TARGET_XFER_E_IO;
8990 /* Map pre-existing objects onto letters. DO NOT do this for new
8991 objects!!! Instead specify new query packets. */
8994 case TARGET_OBJECT_AVR:
8998 case TARGET_OBJECT_AUXV:
8999 gdb_assert (annex == NULL);
9000 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
9002 &remote_protocol_packets[PACKET_qXfer_auxv]);
9004 case TARGET_OBJECT_AVAILABLE_FEATURES:
9005 return remote_read_qxfer
9006 (ops, "features", annex, readbuf, offset, len, xfered_len,
9007 &remote_protocol_packets[PACKET_qXfer_features]);
9009 case TARGET_OBJECT_LIBRARIES:
9010 return remote_read_qxfer
9011 (ops, "libraries", annex, readbuf, offset, len, xfered_len,
9012 &remote_protocol_packets[PACKET_qXfer_libraries]);
9014 case TARGET_OBJECT_LIBRARIES_SVR4:
9015 return remote_read_qxfer
9016 (ops, "libraries-svr4", annex, readbuf, offset, len, xfered_len,
9017 &remote_protocol_packets[PACKET_qXfer_libraries_svr4]);
9019 case TARGET_OBJECT_MEMORY_MAP:
9020 gdb_assert (annex == NULL);
9021 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
9023 &remote_protocol_packets[PACKET_qXfer_memory_map]);
9025 case TARGET_OBJECT_OSDATA:
9026 /* Should only get here if we're connected. */
9027 gdb_assert (rs->remote_desc);
9028 return remote_read_qxfer
9029 (ops, "osdata", annex, readbuf, offset, len, xfered_len,
9030 &remote_protocol_packets[PACKET_qXfer_osdata]);
9032 case TARGET_OBJECT_THREADS:
9033 gdb_assert (annex == NULL);
9034 return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len,
9036 &remote_protocol_packets[PACKET_qXfer_threads]);
9038 case TARGET_OBJECT_TRACEFRAME_INFO:
9039 gdb_assert (annex == NULL);
9040 return remote_read_qxfer
9041 (ops, "traceframe-info", annex, readbuf, offset, len, xfered_len,
9042 &remote_protocol_packets[PACKET_qXfer_traceframe_info]);
9044 case TARGET_OBJECT_FDPIC:
9045 return remote_read_qxfer (ops, "fdpic", annex, readbuf, offset, len,
9047 &remote_protocol_packets[PACKET_qXfer_fdpic]);
9049 case TARGET_OBJECT_OPENVMS_UIB:
9050 return remote_read_qxfer (ops, "uib", annex, readbuf, offset, len,
9052 &remote_protocol_packets[PACKET_qXfer_uib]);
9054 case TARGET_OBJECT_BTRACE:
9055 return remote_read_qxfer (ops, "btrace", annex, readbuf, offset, len,
9057 &remote_protocol_packets[PACKET_qXfer_btrace]);
9059 case TARGET_OBJECT_BTRACE_CONF:
9060 return remote_read_qxfer (ops, "btrace-conf", annex, readbuf, offset,
9062 &remote_protocol_packets[PACKET_qXfer_btrace_conf]);
9065 return TARGET_XFER_E_IO;
9068 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
9069 large enough let the caller deal with it. */
9070 if (len < get_remote_packet_size ())
9071 return TARGET_XFER_E_IO;
9072 len = get_remote_packet_size ();
9074 /* Except for querying the minimum buffer size, target must be open. */
9075 if (!rs->remote_desc)
9076 error (_("remote query is only available after target open"));
9078 gdb_assert (annex != NULL);
9079 gdb_assert (readbuf != NULL);
9085 /* We used one buffer char for the remote protocol q command and
9086 another for the query type. As the remote protocol encapsulation
9087 uses 4 chars plus one extra in case we are debugging
9088 (remote_debug), we have PBUFZIZ - 7 left to pack the query
9091 while (annex[i] && (i < (get_remote_packet_size () - 8)))
9093 /* Bad caller may have sent forbidden characters. */
9094 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
9099 gdb_assert (annex[i] == '\0');
9101 i = putpkt (rs->buf);
9103 return TARGET_XFER_E_IO;
9105 getpkt (&rs->buf, &rs->buf_size, 0);
9106 strcpy ((char *) readbuf, rs->buf);
9108 *xfered_len = strlen ((char *) readbuf);
9109 return TARGET_XFER_OK;
9113 remote_search_memory (struct target_ops* ops,
9114 CORE_ADDR start_addr, ULONGEST search_space_len,
9115 const gdb_byte *pattern, ULONGEST pattern_len,
9116 CORE_ADDR *found_addrp)
9118 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
9119 struct remote_state *rs = get_remote_state ();
9120 int max_size = get_memory_write_packet_size ();
9121 struct packet_config *packet =
9122 &remote_protocol_packets[PACKET_qSearch_memory];
9123 /* Number of packet bytes used to encode the pattern;
9124 this could be more than PATTERN_LEN due to escape characters. */
9125 int escaped_pattern_len;
9126 /* Amount of pattern that was encodable in the packet. */
9127 int used_pattern_len;
9130 ULONGEST found_addr;
9132 /* Don't go to the target if we don't have to.
9133 This is done before checking packet->support to avoid the possibility that
9134 a success for this edge case means the facility works in general. */
9135 if (pattern_len > search_space_len)
9137 if (pattern_len == 0)
9139 *found_addrp = start_addr;
9143 /* If we already know the packet isn't supported, fall back to the simple
9144 way of searching memory. */
9146 if (packet_config_support (packet) == PACKET_DISABLE)
9148 /* Target doesn't provided special support, fall back and use the
9149 standard support (copy memory and do the search here). */
9150 return simple_search_memory (ops, start_addr, search_space_len,
9151 pattern, pattern_len, found_addrp);
9154 /* Make sure the remote is pointing at the right process. */
9155 set_general_process ();
9157 /* Insert header. */
9158 i = snprintf (rs->buf, max_size,
9159 "qSearch:memory:%s;%s;",
9160 phex_nz (start_addr, addr_size),
9161 phex_nz (search_space_len, sizeof (search_space_len)));
9162 max_size -= (i + 1);
9164 /* Escape as much data as fits into rs->buf. */
9165 escaped_pattern_len =
9166 remote_escape_output (pattern, pattern_len, (gdb_byte *) rs->buf + i,
9167 &used_pattern_len, max_size);
9169 /* Bail if the pattern is too large. */
9170 if (used_pattern_len != pattern_len)
9171 error (_("Pattern is too large to transmit to remote target."));
9173 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
9174 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
9175 || packet_ok (rs->buf, packet) != PACKET_OK)
9177 /* The request may not have worked because the command is not
9178 supported. If so, fall back to the simple way. */
9179 if (packet->support == PACKET_DISABLE)
9181 return simple_search_memory (ops, start_addr, search_space_len,
9182 pattern, pattern_len, found_addrp);
9187 if (rs->buf[0] == '0')
9189 else if (rs->buf[0] == '1')
9192 if (rs->buf[1] != ',')
9193 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
9194 unpack_varlen_hex (rs->buf + 2, &found_addr);
9195 *found_addrp = found_addr;
9198 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
9204 remote_rcmd (struct target_ops *self, const char *command,
9205 struct ui_file *outbuf)
9207 struct remote_state *rs = get_remote_state ();
9210 if (!rs->remote_desc)
9211 error (_("remote rcmd is only available after target open"));
9213 /* Send a NULL command across as an empty command. */
9214 if (command == NULL)
9217 /* The query prefix. */
9218 strcpy (rs->buf, "qRcmd,");
9219 p = strchr (rs->buf, '\0');
9221 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/)
9222 > get_remote_packet_size ())
9223 error (_("\"monitor\" command ``%s'' is too long."), command);
9225 /* Encode the actual command. */
9226 bin2hex ((const gdb_byte *) command, p, strlen (command));
9228 if (putpkt (rs->buf) < 0)
9229 error (_("Communication problem with target."));
9231 /* get/display the response */
9236 /* XXX - see also remote_get_noisy_reply(). */
9237 QUIT; /* Allow user to bail out with ^C. */
9239 if (getpkt_sane (&rs->buf, &rs->buf_size, 0) == -1)
9241 /* Timeout. Continue to (try to) read responses.
9242 This is better than stopping with an error, assuming the stub
9243 is still executing the (long) monitor command.
9244 If needed, the user can interrupt gdb using C-c, obtaining
9245 an effect similar to stop on timeout. */
9250 error (_("Target does not support this command."));
9251 if (buf[0] == 'O' && buf[1] != 'K')
9253 remote_console_output (buf + 1); /* 'O' message from stub. */
9256 if (strcmp (buf, "OK") == 0)
9258 if (strlen (buf) == 3 && buf[0] == 'E'
9259 && isdigit (buf[1]) && isdigit (buf[2]))
9261 error (_("Protocol error with Rcmd"));
9263 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
9265 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
9267 fputc_unfiltered (c, outbuf);
9273 static VEC(mem_region_s) *
9274 remote_memory_map (struct target_ops *ops)
9276 VEC(mem_region_s) *result = NULL;
9277 char *text = target_read_stralloc (¤t_target,
9278 TARGET_OBJECT_MEMORY_MAP, NULL);
9282 struct cleanup *back_to = make_cleanup (xfree, text);
9284 result = parse_memory_map (text);
9285 do_cleanups (back_to);
9292 packet_command (char *args, int from_tty)
9294 struct remote_state *rs = get_remote_state ();
9296 if (!rs->remote_desc)
9297 error (_("command can only be used with remote target"));
9300 error (_("remote-packet command requires packet text as argument"));
9302 puts_filtered ("sending: ");
9303 print_packet (args);
9304 puts_filtered ("\n");
9307 getpkt (&rs->buf, &rs->buf_size, 0);
9308 puts_filtered ("received: ");
9309 print_packet (rs->buf);
9310 puts_filtered ("\n");
9314 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
9316 static void display_thread_info (struct gdb_ext_thread_info *info);
9318 static void threadset_test_cmd (char *cmd, int tty);
9320 static void threadalive_test (char *cmd, int tty);
9322 static void threadlist_test_cmd (char *cmd, int tty);
9324 int get_and_display_threadinfo (threadref *ref);
9326 static void threadinfo_test_cmd (char *cmd, int tty);
9328 static int thread_display_step (threadref *ref, void *context);
9330 static void threadlist_update_test_cmd (char *cmd, int tty);
9332 static void init_remote_threadtests (void);
9334 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
9337 threadset_test_cmd (char *cmd, int tty)
9339 int sample_thread = SAMPLE_THREAD;
9341 printf_filtered (_("Remote threadset test\n"));
9342 set_general_thread (sample_thread);
9347 threadalive_test (char *cmd, int tty)
9349 int sample_thread = SAMPLE_THREAD;
9350 int pid = ptid_get_pid (inferior_ptid);
9351 ptid_t ptid = ptid_build (pid, sample_thread, 0);
9353 if (remote_thread_alive (ptid))
9354 printf_filtered ("PASS: Thread alive test\n");
9356 printf_filtered ("FAIL: Thread alive test\n");
9359 void output_threadid (char *title, threadref *ref);
9362 output_threadid (char *title, threadref *ref)
9366 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
9368 printf_filtered ("%s %s\n", title, (&hexid[0]));
9372 threadlist_test_cmd (char *cmd, int tty)
9375 threadref nextthread;
9376 int done, result_count;
9377 threadref threadlist[3];
9379 printf_filtered ("Remote Threadlist test\n");
9380 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
9381 &result_count, &threadlist[0]))
9382 printf_filtered ("FAIL: threadlist test\n");
9385 threadref *scan = threadlist;
9386 threadref *limit = scan + result_count;
9388 while (scan < limit)
9389 output_threadid (" thread ", scan++);
9394 display_thread_info (struct gdb_ext_thread_info *info)
9396 output_threadid ("Threadid: ", &info->threadid);
9397 printf_filtered ("Name: %s\n ", info->shortname);
9398 printf_filtered ("State: %s\n", info->display);
9399 printf_filtered ("other: %s\n\n", info->more_display);
9403 get_and_display_threadinfo (threadref *ref)
9407 struct gdb_ext_thread_info threadinfo;
9409 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
9410 | TAG_MOREDISPLAY | TAG_DISPLAY;
9411 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
9412 display_thread_info (&threadinfo);
9417 threadinfo_test_cmd (char *cmd, int tty)
9419 int athread = SAMPLE_THREAD;
9423 int_to_threadref (&thread, athread);
9424 printf_filtered ("Remote Threadinfo test\n");
9425 if (!get_and_display_threadinfo (&thread))
9426 printf_filtered ("FAIL cannot get thread info\n");
9430 thread_display_step (threadref *ref, void *context)
9432 /* output_threadid(" threadstep ",ref); *//* simple test */
9433 return get_and_display_threadinfo (ref);
9437 threadlist_update_test_cmd (char *cmd, int tty)
9439 printf_filtered ("Remote Threadlist update test\n");
9440 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
9444 init_remote_threadtests (void)
9446 add_com ("tlist", class_obscure, threadlist_test_cmd,
9447 _("Fetch and print the remote list of "
9448 "thread identifiers, one pkt only"));
9449 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
9450 _("Fetch and display info about one thread"));
9451 add_com ("tset", class_obscure, threadset_test_cmd,
9452 _("Test setting to a different thread"));
9453 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
9454 _("Iterate through updating all remote thread info"));
9455 add_com ("talive", class_obscure, threadalive_test,
9456 _(" Remote thread alive test "));
9461 /* Convert a thread ID to a string. Returns the string in a static
9465 remote_pid_to_str (struct target_ops *ops, ptid_t ptid)
9467 static char buf[64];
9468 struct remote_state *rs = get_remote_state ();
9470 if (ptid_equal (ptid, null_ptid))
9471 return normal_pid_to_str (ptid);
9472 else if (ptid_is_pid (ptid))
9474 /* Printing an inferior target id. */
9476 /* When multi-process extensions are off, there's no way in the
9477 remote protocol to know the remote process id, if there's any
9478 at all. There's one exception --- when we're connected with
9479 target extended-remote, and we manually attached to a process
9480 with "attach PID". We don't record anywhere a flag that
9481 allows us to distinguish that case from the case of
9482 connecting with extended-remote and the stub already being
9483 attached to a process, and reporting yes to qAttached, hence
9484 no smart special casing here. */
9485 if (!remote_multi_process_p (rs))
9487 xsnprintf (buf, sizeof buf, "Remote target");
9491 return normal_pid_to_str (ptid);
9495 if (ptid_equal (magic_null_ptid, ptid))
9496 xsnprintf (buf, sizeof buf, "Thread <main>");
9497 else if (rs->extended && remote_multi_process_p (rs))
9498 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
9499 ptid_get_pid (ptid), ptid_get_lwp (ptid));
9501 xsnprintf (buf, sizeof buf, "Thread %ld",
9502 ptid_get_lwp (ptid));
9507 /* Get the address of the thread local variable in OBJFILE which is
9508 stored at OFFSET within the thread local storage for thread PTID. */
9511 remote_get_thread_local_address (struct target_ops *ops,
9512 ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
9514 if (packet_support (PACKET_qGetTLSAddr) != PACKET_DISABLE)
9516 struct remote_state *rs = get_remote_state ();
9518 char *endp = rs->buf + get_remote_packet_size ();
9519 enum packet_result result;
9521 strcpy (p, "qGetTLSAddr:");
9523 p = write_ptid (p, endp, ptid);
9525 p += hexnumstr (p, offset);
9527 p += hexnumstr (p, lm);
9531 getpkt (&rs->buf, &rs->buf_size, 0);
9532 result = packet_ok (rs->buf,
9533 &remote_protocol_packets[PACKET_qGetTLSAddr]);
9534 if (result == PACKET_OK)
9538 unpack_varlen_hex (rs->buf, &result);
9541 else if (result == PACKET_UNKNOWN)
9542 throw_error (TLS_GENERIC_ERROR,
9543 _("Remote target doesn't support qGetTLSAddr packet"));
9545 throw_error (TLS_GENERIC_ERROR,
9546 _("Remote target failed to process qGetTLSAddr request"));
9549 throw_error (TLS_GENERIC_ERROR,
9550 _("TLS not supported or disabled on this target"));
9555 /* Provide thread local base, i.e. Thread Information Block address.
9556 Returns 1 if ptid is found and thread_local_base is non zero. */
9559 remote_get_tib_address (struct target_ops *self, ptid_t ptid, CORE_ADDR *addr)
9561 if (packet_support (PACKET_qGetTIBAddr) != PACKET_DISABLE)
9563 struct remote_state *rs = get_remote_state ();
9565 char *endp = rs->buf + get_remote_packet_size ();
9566 enum packet_result result;
9568 strcpy (p, "qGetTIBAddr:");
9570 p = write_ptid (p, endp, ptid);
9574 getpkt (&rs->buf, &rs->buf_size, 0);
9575 result = packet_ok (rs->buf,
9576 &remote_protocol_packets[PACKET_qGetTIBAddr]);
9577 if (result == PACKET_OK)
9581 unpack_varlen_hex (rs->buf, &result);
9583 *addr = (CORE_ADDR) result;
9586 else if (result == PACKET_UNKNOWN)
9587 error (_("Remote target doesn't support qGetTIBAddr packet"));
9589 error (_("Remote target failed to process qGetTIBAddr request"));
9592 error (_("qGetTIBAddr not supported or disabled on this target"));
9597 /* Support for inferring a target description based on the current
9598 architecture and the size of a 'g' packet. While the 'g' packet
9599 can have any size (since optional registers can be left off the
9600 end), some sizes are easily recognizable given knowledge of the
9601 approximate architecture. */
9603 struct remote_g_packet_guess
9606 const struct target_desc *tdesc;
9608 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
9609 DEF_VEC_O(remote_g_packet_guess_s);
9611 struct remote_g_packet_data
9613 VEC(remote_g_packet_guess_s) *guesses;
9616 static struct gdbarch_data *remote_g_packet_data_handle;
9619 remote_g_packet_data_init (struct obstack *obstack)
9621 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
9625 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
9626 const struct target_desc *tdesc)
9628 struct remote_g_packet_data *data
9629 = gdbarch_data (gdbarch, remote_g_packet_data_handle);
9630 struct remote_g_packet_guess new_guess, *guess;
9633 gdb_assert (tdesc != NULL);
9636 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
9638 if (guess->bytes == bytes)
9639 internal_error (__FILE__, __LINE__,
9640 _("Duplicate g packet description added for size %d"),
9643 new_guess.bytes = bytes;
9644 new_guess.tdesc = tdesc;
9645 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
9648 /* Return 1 if remote_read_description would do anything on this target
9649 and architecture, 0 otherwise. */
9652 remote_read_description_p (struct target_ops *target)
9654 struct remote_g_packet_data *data
9655 = gdbarch_data (target_gdbarch (), remote_g_packet_data_handle);
9657 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
9663 static const struct target_desc *
9664 remote_read_description (struct target_ops *target)
9666 struct remote_g_packet_data *data
9667 = gdbarch_data (target_gdbarch (), remote_g_packet_data_handle);
9669 /* Do not try this during initial connection, when we do not know
9670 whether there is a running but stopped thread. */
9671 if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
9672 return target->beneath->to_read_description (target->beneath);
9674 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
9676 struct remote_g_packet_guess *guess;
9678 int bytes = send_g_packet ();
9681 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
9683 if (guess->bytes == bytes)
9684 return guess->tdesc;
9686 /* We discard the g packet. A minor optimization would be to
9687 hold on to it, and fill the register cache once we have selected
9688 an architecture, but it's too tricky to do safely. */
9691 return target->beneath->to_read_description (target->beneath);
9694 /* Remote file transfer support. This is host-initiated I/O, not
9695 target-initiated; for target-initiated, see remote-fileio.c. */
9697 /* If *LEFT is at least the length of STRING, copy STRING to
9698 *BUFFER, update *BUFFER to point to the new end of the buffer, and
9699 decrease *LEFT. Otherwise raise an error. */
9702 remote_buffer_add_string (char **buffer, int *left, char *string)
9704 int len = strlen (string);
9707 error (_("Packet too long for target."));
9709 memcpy (*buffer, string, len);
9713 /* NUL-terminate the buffer as a convenience, if there is
9719 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
9720 *BUFFER, update *BUFFER to point to the new end of the buffer, and
9721 decrease *LEFT. Otherwise raise an error. */
9724 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
9727 if (2 * len > *left)
9728 error (_("Packet too long for target."));
9730 bin2hex (bytes, *buffer, len);
9734 /* NUL-terminate the buffer as a convenience, if there is
9740 /* If *LEFT is large enough, convert VALUE to hex and add it to
9741 *BUFFER, update *BUFFER to point to the new end of the buffer, and
9742 decrease *LEFT. Otherwise raise an error. */
9745 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
9747 int len = hexnumlen (value);
9750 error (_("Packet too long for target."));
9752 hexnumstr (*buffer, value);
9756 /* NUL-terminate the buffer as a convenience, if there is
9762 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
9763 value, *REMOTE_ERRNO to the remote error number or zero if none
9764 was included, and *ATTACHMENT to point to the start of the annex
9765 if any. The length of the packet isn't needed here; there may
9766 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
9768 Return 0 if the packet could be parsed, -1 if it could not. If
9769 -1 is returned, the other variables may not be initialized. */
9772 remote_hostio_parse_result (char *buffer, int *retcode,
9773 int *remote_errno, char **attachment)
9780 if (buffer[0] != 'F')
9784 *retcode = strtol (&buffer[1], &p, 16);
9785 if (errno != 0 || p == &buffer[1])
9788 /* Check for ",errno". */
9792 *remote_errno = strtol (p + 1, &p2, 16);
9793 if (errno != 0 || p + 1 == p2)
9798 /* Check for ";attachment". If there is no attachment, the
9799 packet should end here. */
9802 *attachment = p + 1;
9805 else if (*p == '\0')
9811 /* Send a prepared I/O packet to the target and read its response.
9812 The prepared packet is in the global RS->BUF before this function
9813 is called, and the answer is there when we return.
9815 COMMAND_BYTES is the length of the request to send, which may include
9816 binary data. WHICH_PACKET is the packet configuration to check
9817 before attempting a packet. If an error occurs, *REMOTE_ERRNO
9818 is set to the error number and -1 is returned. Otherwise the value
9819 returned by the function is returned.
9821 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
9822 attachment is expected; an error will be reported if there's a
9823 mismatch. If one is found, *ATTACHMENT will be set to point into
9824 the packet buffer and *ATTACHMENT_LEN will be set to the
9825 attachment's length. */
9828 remote_hostio_send_command (int command_bytes, int which_packet,
9829 int *remote_errno, char **attachment,
9830 int *attachment_len)
9832 struct remote_state *rs = get_remote_state ();
9833 int ret, bytes_read;
9834 char *attachment_tmp;
9836 if (!rs->remote_desc
9837 || packet_support (which_packet) == PACKET_DISABLE)
9839 *remote_errno = FILEIO_ENOSYS;
9843 putpkt_binary (rs->buf, command_bytes);
9844 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
9846 /* If it timed out, something is wrong. Don't try to parse the
9850 *remote_errno = FILEIO_EINVAL;
9854 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
9857 *remote_errno = FILEIO_EINVAL;
9859 case PACKET_UNKNOWN:
9860 *remote_errno = FILEIO_ENOSYS;
9866 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
9869 *remote_errno = FILEIO_EINVAL;
9873 /* Make sure we saw an attachment if and only if we expected one. */
9874 if ((attachment_tmp == NULL && attachment != NULL)
9875 || (attachment_tmp != NULL && attachment == NULL))
9877 *remote_errno = FILEIO_EINVAL;
9881 /* If an attachment was found, it must point into the packet buffer;
9882 work out how many bytes there were. */
9883 if (attachment_tmp != NULL)
9885 *attachment = attachment_tmp;
9886 *attachment_len = bytes_read - (*attachment - rs->buf);
9892 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
9893 remote file descriptor, or -1 if an error occurs (and set
9897 remote_hostio_open (struct target_ops *self,
9898 const char *filename, int flags, int mode,
9901 struct remote_state *rs = get_remote_state ();
9903 int left = get_remote_packet_size () - 1;
9905 remote_buffer_add_string (&p, &left, "vFile:open:");
9907 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
9909 remote_buffer_add_string (&p, &left, ",");
9911 remote_buffer_add_int (&p, &left, flags);
9912 remote_buffer_add_string (&p, &left, ",");
9914 remote_buffer_add_int (&p, &left, mode);
9916 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
9917 remote_errno, NULL, NULL);
9920 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
9921 Return the number of bytes written, or -1 if an error occurs (and
9922 set *REMOTE_ERRNO). */
9925 remote_hostio_pwrite (struct target_ops *self,
9926 int fd, const gdb_byte *write_buf, int len,
9927 ULONGEST offset, int *remote_errno)
9929 struct remote_state *rs = get_remote_state ();
9931 int left = get_remote_packet_size ();
9934 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
9936 remote_buffer_add_int (&p, &left, fd);
9937 remote_buffer_add_string (&p, &left, ",");
9939 remote_buffer_add_int (&p, &left, offset);
9940 remote_buffer_add_string (&p, &left, ",");
9942 p += remote_escape_output (write_buf, len, (gdb_byte *) p, &out_len,
9943 get_remote_packet_size () - (p - rs->buf));
9945 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
9946 remote_errno, NULL, NULL);
9949 /* Read up to LEN bytes FD on the remote target into READ_BUF
9950 Return the number of bytes read, or -1 if an error occurs (and
9951 set *REMOTE_ERRNO). */
9954 remote_hostio_pread (struct target_ops *self,
9955 int fd, gdb_byte *read_buf, int len,
9956 ULONGEST offset, int *remote_errno)
9958 struct remote_state *rs = get_remote_state ();
9961 int left = get_remote_packet_size ();
9962 int ret, attachment_len;
9965 remote_buffer_add_string (&p, &left, "vFile:pread:");
9967 remote_buffer_add_int (&p, &left, fd);
9968 remote_buffer_add_string (&p, &left, ",");
9970 remote_buffer_add_int (&p, &left, len);
9971 remote_buffer_add_string (&p, &left, ",");
9973 remote_buffer_add_int (&p, &left, offset);
9975 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
9976 remote_errno, &attachment,
9982 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
9984 if (read_len != ret)
9985 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
9990 /* Close FD on the remote target. Return 0, or -1 if an error occurs
9991 (and set *REMOTE_ERRNO). */
9994 remote_hostio_close (struct target_ops *self, int fd, int *remote_errno)
9996 struct remote_state *rs = get_remote_state ();
9998 int left = get_remote_packet_size () - 1;
10000 remote_buffer_add_string (&p, &left, "vFile:close:");
10002 remote_buffer_add_int (&p, &left, fd);
10004 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
10005 remote_errno, NULL, NULL);
10008 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
10009 occurs (and set *REMOTE_ERRNO). */
10012 remote_hostio_unlink (struct target_ops *self,
10013 const char *filename, int *remote_errno)
10015 struct remote_state *rs = get_remote_state ();
10017 int left = get_remote_packet_size () - 1;
10019 remote_buffer_add_string (&p, &left, "vFile:unlink:");
10021 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
10022 strlen (filename));
10024 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
10025 remote_errno, NULL, NULL);
10028 /* Read value of symbolic link FILENAME on the remote target. Return
10029 a null-terminated string allocated via xmalloc, or NULL if an error
10030 occurs (and set *REMOTE_ERRNO). */
10033 remote_hostio_readlink (struct target_ops *self,
10034 const char *filename, int *remote_errno)
10036 struct remote_state *rs = get_remote_state ();
10039 int left = get_remote_packet_size ();
10040 int len, attachment_len;
10044 remote_buffer_add_string (&p, &left, "vFile:readlink:");
10046 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
10047 strlen (filename));
10049 len = remote_hostio_send_command (p - rs->buf, PACKET_vFile_readlink,
10050 remote_errno, &attachment,
10056 ret = xmalloc (len + 1);
10058 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
10059 (gdb_byte *) ret, len);
10060 if (read_len != len)
10061 error (_("Readlink returned %d, but %d bytes."), len, read_len);
10068 remote_fileio_errno_to_host (int errnum)
10074 case FILEIO_ENOENT:
10082 case FILEIO_EACCES:
10084 case FILEIO_EFAULT:
10088 case FILEIO_EEXIST:
10090 case FILEIO_ENODEV:
10092 case FILEIO_ENOTDIR:
10094 case FILEIO_EISDIR:
10096 case FILEIO_EINVAL:
10098 case FILEIO_ENFILE:
10100 case FILEIO_EMFILE:
10104 case FILEIO_ENOSPC:
10106 case FILEIO_ESPIPE:
10110 case FILEIO_ENOSYS:
10112 case FILEIO_ENAMETOOLONG:
10113 return ENAMETOOLONG;
10119 remote_hostio_error (int errnum)
10121 int host_error = remote_fileio_errno_to_host (errnum);
10123 if (host_error == -1)
10124 error (_("Unknown remote I/O error %d"), errnum);
10126 error (_("Remote I/O error: %s"), safe_strerror (host_error));
10130 remote_hostio_close_cleanup (void *opaque)
10132 int fd = *(int *) opaque;
10135 remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno);
10140 remote_bfd_iovec_open (struct bfd *abfd, void *open_closure)
10142 const char *filename = bfd_get_filename (abfd);
10143 int fd, remote_errno;
10146 gdb_assert (remote_filename_p (filename));
10148 fd = remote_hostio_open (find_target_at (process_stratum),
10149 filename + 7, FILEIO_O_RDONLY, 0, &remote_errno);
10152 errno = remote_fileio_errno_to_host (remote_errno);
10153 bfd_set_error (bfd_error_system_call);
10157 stream = xmalloc (sizeof (int));
10163 remote_bfd_iovec_close (struct bfd *abfd, void *stream)
10165 int fd = *(int *)stream;
10170 /* Ignore errors on close; these may happen if the remote
10171 connection was already torn down. */
10172 remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno);
10174 /* Zero means success. */
10179 remote_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
10180 file_ptr nbytes, file_ptr offset)
10182 int fd = *(int *)stream;
10184 file_ptr pos, bytes;
10187 while (nbytes > pos)
10189 bytes = remote_hostio_pread (find_target_at (process_stratum),
10190 fd, (gdb_byte *) buf + pos, nbytes - pos,
10191 offset + pos, &remote_errno);
10193 /* Success, but no bytes, means end-of-file. */
10197 errno = remote_fileio_errno_to_host (remote_errno);
10198 bfd_set_error (bfd_error_system_call);
10209 remote_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
10211 /* FIXME: We should probably implement remote_hostio_stat. */
10212 sb->st_size = INT_MAX;
10217 remote_filename_p (const char *filename)
10219 return startswith (filename, REMOTE_SYSROOT_PREFIX);
10223 remote_bfd_open (const char *remote_file, const char *target)
10225 bfd *abfd = gdb_bfd_openr_iovec (remote_file, target,
10226 remote_bfd_iovec_open, NULL,
10227 remote_bfd_iovec_pread,
10228 remote_bfd_iovec_close,
10229 remote_bfd_iovec_stat);
10235 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
10237 struct cleanup *back_to, *close_cleanup;
10238 int retcode, fd, remote_errno, bytes, io_size;
10241 int bytes_in_buffer;
10244 struct remote_state *rs = get_remote_state ();
10246 if (!rs->remote_desc)
10247 error (_("command can only be used with remote target"));
10249 file = gdb_fopen_cloexec (local_file, "rb");
10251 perror_with_name (local_file);
10252 back_to = make_cleanup_fclose (file);
10254 fd = remote_hostio_open (find_target_at (process_stratum),
10255 remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
10257 0700, &remote_errno);
10259 remote_hostio_error (remote_errno);
10261 /* Send up to this many bytes at once. They won't all fit in the
10262 remote packet limit, so we'll transfer slightly fewer. */
10263 io_size = get_remote_packet_size ();
10264 buffer = xmalloc (io_size);
10265 make_cleanup (xfree, buffer);
10267 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
10269 bytes_in_buffer = 0;
10272 while (bytes_in_buffer || !saw_eof)
10276 bytes = fread (buffer + bytes_in_buffer, 1,
10277 io_size - bytes_in_buffer,
10282 error (_("Error reading %s."), local_file);
10285 /* EOF. Unless there is something still in the
10286 buffer from the last iteration, we are done. */
10288 if (bytes_in_buffer == 0)
10296 bytes += bytes_in_buffer;
10297 bytes_in_buffer = 0;
10299 retcode = remote_hostio_pwrite (find_target_at (process_stratum),
10301 offset, &remote_errno);
10304 remote_hostio_error (remote_errno);
10305 else if (retcode == 0)
10306 error (_("Remote write of %d bytes returned 0!"), bytes);
10307 else if (retcode < bytes)
10309 /* Short write. Save the rest of the read data for the next
10311 bytes_in_buffer = bytes - retcode;
10312 memmove (buffer, buffer + retcode, bytes_in_buffer);
10318 discard_cleanups (close_cleanup);
10319 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
10320 remote_hostio_error (remote_errno);
10323 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
10324 do_cleanups (back_to);
10328 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
10330 struct cleanup *back_to, *close_cleanup;
10331 int fd, remote_errno, bytes, io_size;
10335 struct remote_state *rs = get_remote_state ();
10337 if (!rs->remote_desc)
10338 error (_("command can only be used with remote target"));
10340 fd = remote_hostio_open (find_target_at (process_stratum),
10341 remote_file, FILEIO_O_RDONLY, 0, &remote_errno);
10343 remote_hostio_error (remote_errno);
10345 file = gdb_fopen_cloexec (local_file, "wb");
10347 perror_with_name (local_file);
10348 back_to = make_cleanup_fclose (file);
10350 /* Send up to this many bytes at once. They won't all fit in the
10351 remote packet limit, so we'll transfer slightly fewer. */
10352 io_size = get_remote_packet_size ();
10353 buffer = xmalloc (io_size);
10354 make_cleanup (xfree, buffer);
10356 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
10361 bytes = remote_hostio_pread (find_target_at (process_stratum),
10362 fd, buffer, io_size, offset, &remote_errno);
10364 /* Success, but no bytes, means end-of-file. */
10367 remote_hostio_error (remote_errno);
10371 bytes = fwrite (buffer, 1, bytes, file);
10373 perror_with_name (local_file);
10376 discard_cleanups (close_cleanup);
10377 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
10378 remote_hostio_error (remote_errno);
10381 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
10382 do_cleanups (back_to);
10386 remote_file_delete (const char *remote_file, int from_tty)
10388 int retcode, remote_errno;
10389 struct remote_state *rs = get_remote_state ();
10391 if (!rs->remote_desc)
10392 error (_("command can only be used with remote target"));
10394 retcode = remote_hostio_unlink (find_target_at (process_stratum),
10395 remote_file, &remote_errno);
10397 remote_hostio_error (remote_errno);
10400 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
10404 remote_put_command (char *args, int from_tty)
10406 struct cleanup *back_to;
10410 error_no_arg (_("file to put"));
10412 argv = gdb_buildargv (args);
10413 back_to = make_cleanup_freeargv (argv);
10414 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
10415 error (_("Invalid parameters to remote put"));
10417 remote_file_put (argv[0], argv[1], from_tty);
10419 do_cleanups (back_to);
10423 remote_get_command (char *args, int from_tty)
10425 struct cleanup *back_to;
10429 error_no_arg (_("file to get"));
10431 argv = gdb_buildargv (args);
10432 back_to = make_cleanup_freeargv (argv);
10433 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
10434 error (_("Invalid parameters to remote get"));
10436 remote_file_get (argv[0], argv[1], from_tty);
10438 do_cleanups (back_to);
10442 remote_delete_command (char *args, int from_tty)
10444 struct cleanup *back_to;
10448 error_no_arg (_("file to delete"));
10450 argv = gdb_buildargv (args);
10451 back_to = make_cleanup_freeargv (argv);
10452 if (argv[0] == NULL || argv[1] != NULL)
10453 error (_("Invalid parameters to remote delete"));
10455 remote_file_delete (argv[0], from_tty);
10457 do_cleanups (back_to);
10461 remote_command (char *args, int from_tty)
10463 help_list (remote_cmdlist, "remote ", all_commands, gdb_stdout);
10467 remote_can_execute_reverse (struct target_ops *self)
10469 if (packet_support (PACKET_bs) == PACKET_ENABLE
10470 || packet_support (PACKET_bc) == PACKET_ENABLE)
10477 remote_supports_non_stop (struct target_ops *self)
10483 remote_supports_disable_randomization (struct target_ops *self)
10485 /* Only supported in extended mode. */
10490 remote_supports_multi_process (struct target_ops *self)
10492 struct remote_state *rs = get_remote_state ();
10494 /* Only extended-remote handles being attached to multiple
10495 processes, even though plain remote can use the multi-process
10496 thread id extensions, so that GDB knows the target process's
10498 return rs->extended && remote_multi_process_p (rs);
10502 remote_supports_cond_tracepoints (void)
10504 return packet_support (PACKET_ConditionalTracepoints) == PACKET_ENABLE;
10508 remote_supports_cond_breakpoints (struct target_ops *self)
10510 return packet_support (PACKET_ConditionalBreakpoints) == PACKET_ENABLE;
10514 remote_supports_fast_tracepoints (void)
10516 return packet_support (PACKET_FastTracepoints) == PACKET_ENABLE;
10520 remote_supports_static_tracepoints (void)
10522 return packet_support (PACKET_StaticTracepoints) == PACKET_ENABLE;
10526 remote_supports_install_in_trace (void)
10528 return packet_support (PACKET_InstallInTrace) == PACKET_ENABLE;
10532 remote_supports_enable_disable_tracepoint (struct target_ops *self)
10534 return (packet_support (PACKET_EnableDisableTracepoints_feature)
10539 remote_supports_string_tracing (struct target_ops *self)
10541 return packet_support (PACKET_tracenz_feature) == PACKET_ENABLE;
10545 remote_can_run_breakpoint_commands (struct target_ops *self)
10547 return packet_support (PACKET_BreakpointCommands) == PACKET_ENABLE;
10551 remote_trace_init (struct target_ops *self)
10554 remote_get_noisy_reply (&target_buf, &target_buf_size);
10555 if (strcmp (target_buf, "OK") != 0)
10556 error (_("Target does not support this command."));
10559 static void free_actions_list (char **actions_list);
10560 static void free_actions_list_cleanup_wrapper (void *);
10562 free_actions_list_cleanup_wrapper (void *al)
10564 free_actions_list (al);
10568 free_actions_list (char **actions_list)
10572 if (actions_list == 0)
10575 for (ndx = 0; actions_list[ndx]; ndx++)
10576 xfree (actions_list[ndx]);
10578 xfree (actions_list);
10581 /* Recursive routine to walk through command list including loops, and
10582 download packets for each command. */
10585 remote_download_command_source (int num, ULONGEST addr,
10586 struct command_line *cmds)
10588 struct remote_state *rs = get_remote_state ();
10589 struct command_line *cmd;
10591 for (cmd = cmds; cmd; cmd = cmd->next)
10593 QUIT; /* Allow user to bail out with ^C. */
10594 strcpy (rs->buf, "QTDPsrc:");
10595 encode_source_string (num, addr, "cmd", cmd->line,
10596 rs->buf + strlen (rs->buf),
10597 rs->buf_size - strlen (rs->buf));
10599 remote_get_noisy_reply (&target_buf, &target_buf_size);
10600 if (strcmp (target_buf, "OK"))
10601 warning (_("Target does not support source download."));
10603 if (cmd->control_type == while_control
10604 || cmd->control_type == while_stepping_control)
10606 remote_download_command_source (num, addr, *cmd->body_list);
10608 QUIT; /* Allow user to bail out with ^C. */
10609 strcpy (rs->buf, "QTDPsrc:");
10610 encode_source_string (num, addr, "cmd", "end",
10611 rs->buf + strlen (rs->buf),
10612 rs->buf_size - strlen (rs->buf));
10614 remote_get_noisy_reply (&target_buf, &target_buf_size);
10615 if (strcmp (target_buf, "OK"))
10616 warning (_("Target does not support source download."));
10622 remote_download_tracepoint (struct target_ops *self, struct bp_location *loc)
10624 #define BUF_SIZE 2048
10628 char buf[BUF_SIZE];
10629 char **tdp_actions;
10630 char **stepping_actions;
10632 struct cleanup *old_chain = NULL;
10633 struct agent_expr *aexpr;
10634 struct cleanup *aexpr_chain = NULL;
10636 struct breakpoint *b = loc->owner;
10637 struct tracepoint *t = (struct tracepoint *) b;
10639 encode_actions_rsp (loc, &tdp_actions, &stepping_actions);
10640 old_chain = make_cleanup (free_actions_list_cleanup_wrapper,
10642 (void) make_cleanup (free_actions_list_cleanup_wrapper,
10645 tpaddr = loc->address;
10646 sprintf_vma (addrbuf, tpaddr);
10647 xsnprintf (buf, BUF_SIZE, "QTDP:%x:%s:%c:%lx:%x", b->number,
10648 addrbuf, /* address */
10649 (b->enable_state == bp_enabled ? 'E' : 'D'),
10650 t->step_count, t->pass_count);
10651 /* Fast tracepoints are mostly handled by the target, but we can
10652 tell the target how big of an instruction block should be moved
10654 if (b->type == bp_fast_tracepoint)
10656 /* Only test for support at download time; we may not know
10657 target capabilities at definition time. */
10658 if (remote_supports_fast_tracepoints ())
10662 if (gdbarch_fast_tracepoint_valid_at (target_gdbarch (),
10663 tpaddr, &isize, NULL))
10664 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":F%x",
10667 /* If it passed validation at definition but fails now,
10668 something is very wrong. */
10669 internal_error (__FILE__, __LINE__,
10670 _("Fast tracepoint not "
10671 "valid during download"));
10674 /* Fast tracepoints are functionally identical to regular
10675 tracepoints, so don't take lack of support as a reason to
10676 give up on the trace run. */
10677 warning (_("Target does not support fast tracepoints, "
10678 "downloading %d as regular tracepoint"), b->number);
10680 else if (b->type == bp_static_tracepoint)
10682 /* Only test for support at download time; we may not know
10683 target capabilities at definition time. */
10684 if (remote_supports_static_tracepoints ())
10686 struct static_tracepoint_marker marker;
10688 if (target_static_tracepoint_marker_at (tpaddr, &marker))
10689 strcat (buf, ":S");
10691 error (_("Static tracepoint not valid during download"));
10694 /* Fast tracepoints are functionally identical to regular
10695 tracepoints, so don't take lack of support as a reason
10696 to give up on the trace run. */
10697 error (_("Target does not support static tracepoints"));
10699 /* If the tracepoint has a conditional, make it into an agent
10700 expression and append to the definition. */
10703 /* Only test support at download time, we may not know target
10704 capabilities at definition time. */
10705 if (remote_supports_cond_tracepoints ())
10707 aexpr = gen_eval_for_expr (tpaddr, loc->cond);
10708 aexpr_chain = make_cleanup_free_agent_expr (aexpr);
10709 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":X%x,",
10711 pkt = buf + strlen (buf);
10712 for (ndx = 0; ndx < aexpr->len; ++ndx)
10713 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
10715 do_cleanups (aexpr_chain);
10718 warning (_("Target does not support conditional tracepoints, "
10719 "ignoring tp %d cond"), b->number);
10722 if (b->commands || *default_collect)
10725 remote_get_noisy_reply (&target_buf, &target_buf_size);
10726 if (strcmp (target_buf, "OK"))
10727 error (_("Target does not support tracepoints."));
10729 /* do_single_steps (t); */
10732 for (ndx = 0; tdp_actions[ndx]; ndx++)
10734 QUIT; /* Allow user to bail out with ^C. */
10735 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%c",
10736 b->number, addrbuf, /* address */
10738 ((tdp_actions[ndx + 1] || stepping_actions)
10741 remote_get_noisy_reply (&target_buf,
10743 if (strcmp (target_buf, "OK"))
10744 error (_("Error on target while setting tracepoints."));
10747 if (stepping_actions)
10749 for (ndx = 0; stepping_actions[ndx]; ndx++)
10751 QUIT; /* Allow user to bail out with ^C. */
10752 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%s%s",
10753 b->number, addrbuf, /* address */
10754 ((ndx == 0) ? "S" : ""),
10755 stepping_actions[ndx],
10756 (stepping_actions[ndx + 1] ? "-" : ""));
10758 remote_get_noisy_reply (&target_buf,
10760 if (strcmp (target_buf, "OK"))
10761 error (_("Error on target while setting tracepoints."));
10765 if (packet_support (PACKET_TracepointSource) == PACKET_ENABLE)
10767 if (b->addr_string)
10769 strcpy (buf, "QTDPsrc:");
10770 encode_source_string (b->number, loc->address,
10771 "at", b->addr_string, buf + strlen (buf),
10772 2048 - strlen (buf));
10775 remote_get_noisy_reply (&target_buf, &target_buf_size);
10776 if (strcmp (target_buf, "OK"))
10777 warning (_("Target does not support source download."));
10779 if (b->cond_string)
10781 strcpy (buf, "QTDPsrc:");
10782 encode_source_string (b->number, loc->address,
10783 "cond", b->cond_string, buf + strlen (buf),
10784 2048 - strlen (buf));
10786 remote_get_noisy_reply (&target_buf, &target_buf_size);
10787 if (strcmp (target_buf, "OK"))
10788 warning (_("Target does not support source download."));
10790 remote_download_command_source (b->number, loc->address,
10791 breakpoint_commands (b));
10794 do_cleanups (old_chain);
10798 remote_can_download_tracepoint (struct target_ops *self)
10800 struct remote_state *rs = get_remote_state ();
10801 struct trace_status *ts;
10804 /* Don't try to install tracepoints until we've relocated our
10805 symbols, and fetched and merged the target's tracepoint list with
10807 if (rs->starting_up)
10810 ts = current_trace_status ();
10811 status = remote_get_trace_status (self, ts);
10813 if (status == -1 || !ts->running_known || !ts->running)
10816 /* If we are in a tracing experiment, but remote stub doesn't support
10817 installing tracepoint in trace, we have to return. */
10818 if (!remote_supports_install_in_trace ())
10826 remote_download_trace_state_variable (struct target_ops *self,
10827 struct trace_state_variable *tsv)
10829 struct remote_state *rs = get_remote_state ();
10832 xsnprintf (rs->buf, get_remote_packet_size (), "QTDV:%x:%s:%x:",
10833 tsv->number, phex ((ULONGEST) tsv->initial_value, 8),
10835 p = rs->buf + strlen (rs->buf);
10836 if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ())
10837 error (_("Trace state variable name too long for tsv definition packet"));
10838 p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, strlen (tsv->name));
10841 remote_get_noisy_reply (&target_buf, &target_buf_size);
10842 if (*target_buf == '\0')
10843 error (_("Target does not support this command."));
10844 if (strcmp (target_buf, "OK") != 0)
10845 error (_("Error on target while downloading trace state variable."));
10849 remote_enable_tracepoint (struct target_ops *self,
10850 struct bp_location *location)
10852 struct remote_state *rs = get_remote_state ();
10855 sprintf_vma (addr_buf, location->address);
10856 xsnprintf (rs->buf, get_remote_packet_size (), "QTEnable:%x:%s",
10857 location->owner->number, addr_buf);
10859 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
10860 if (*rs->buf == '\0')
10861 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
10862 if (strcmp (rs->buf, "OK") != 0)
10863 error (_("Error on target while enabling tracepoint."));
10867 remote_disable_tracepoint (struct target_ops *self,
10868 struct bp_location *location)
10870 struct remote_state *rs = get_remote_state ();
10873 sprintf_vma (addr_buf, location->address);
10874 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisable:%x:%s",
10875 location->owner->number, addr_buf);
10877 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
10878 if (*rs->buf == '\0')
10879 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
10880 if (strcmp (rs->buf, "OK") != 0)
10881 error (_("Error on target while disabling tracepoint."));
10885 remote_trace_set_readonly_regions (struct target_ops *self)
10889 bfd_size_type size;
10895 return; /* No information to give. */
10897 strcpy (target_buf, "QTro");
10898 offset = strlen (target_buf);
10899 for (s = exec_bfd->sections; s; s = s->next)
10901 char tmp1[40], tmp2[40];
10904 if ((s->flags & SEC_LOAD) == 0 ||
10905 /* (s->flags & SEC_CODE) == 0 || */
10906 (s->flags & SEC_READONLY) == 0)
10910 vma = bfd_get_section_vma (abfd, s);
10911 size = bfd_get_section_size (s);
10912 sprintf_vma (tmp1, vma);
10913 sprintf_vma (tmp2, vma + size);
10914 sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2);
10915 if (offset + sec_length + 1 > target_buf_size)
10917 if (packet_support (PACKET_qXfer_traceframe_info) != PACKET_ENABLE)
10919 Too many sections for read-only sections definition packet."));
10922 xsnprintf (target_buf + offset, target_buf_size - offset, ":%s,%s",
10924 offset += sec_length;
10928 putpkt (target_buf);
10929 getpkt (&target_buf, &target_buf_size, 0);
10934 remote_trace_start (struct target_ops *self)
10936 putpkt ("QTStart");
10937 remote_get_noisy_reply (&target_buf, &target_buf_size);
10938 if (*target_buf == '\0')
10939 error (_("Target does not support this command."));
10940 if (strcmp (target_buf, "OK") != 0)
10941 error (_("Bogus reply from target: %s"), target_buf);
10945 remote_get_trace_status (struct target_ops *self, struct trace_status *ts)
10947 /* Initialize it just to avoid a GCC false warning. */
10949 /* FIXME we need to get register block size some other way. */
10950 extern int trace_regblock_size;
10951 volatile struct gdb_exception ex;
10952 enum packet_result result;
10954 if (packet_support (PACKET_qTStatus) == PACKET_DISABLE)
10957 trace_regblock_size = get_remote_arch_state ()->sizeof_g_packet;
10959 putpkt ("qTStatus");
10961 TRY_CATCH (ex, RETURN_MASK_ERROR)
10963 p = remote_get_noisy_reply (&target_buf, &target_buf_size);
10967 if (ex.error != TARGET_CLOSE_ERROR)
10969 exception_fprintf (gdb_stderr, ex, "qTStatus: ");
10972 throw_exception (ex);
10975 result = packet_ok (p, &remote_protocol_packets[PACKET_qTStatus]);
10977 /* If the remote target doesn't do tracing, flag it. */
10978 if (result == PACKET_UNKNOWN)
10981 /* We're working with a live target. */
10982 ts->filename = NULL;
10985 error (_("Bogus trace status reply from target: %s"), target_buf);
10987 /* Function 'parse_trace_status' sets default value of each field of
10988 'ts' at first, so we don't have to do it here. */
10989 parse_trace_status (p, ts);
10991 return ts->running;
10995 remote_get_tracepoint_status (struct target_ops *self, struct breakpoint *bp,
10996 struct uploaded_tp *utp)
10998 struct remote_state *rs = get_remote_state ();
11000 struct bp_location *loc;
11001 struct tracepoint *tp = (struct tracepoint *) bp;
11002 size_t size = get_remote_packet_size ();
11006 tp->base.hit_count = 0;
11007 tp->traceframe_usage = 0;
11008 for (loc = tp->base.loc; loc; loc = loc->next)
11010 /* If the tracepoint was never downloaded, don't go asking for
11012 if (tp->number_on_target == 0)
11014 xsnprintf (rs->buf, size, "qTP:%x:%s", tp->number_on_target,
11015 phex_nz (loc->address, 0));
11017 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11018 if (reply && *reply)
11021 parse_tracepoint_status (reply + 1, bp, utp);
11027 utp->hit_count = 0;
11028 utp->traceframe_usage = 0;
11029 xsnprintf (rs->buf, size, "qTP:%x:%s", utp->number,
11030 phex_nz (utp->addr, 0));
11032 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11033 if (reply && *reply)
11036 parse_tracepoint_status (reply + 1, bp, utp);
11042 remote_trace_stop (struct target_ops *self)
11045 remote_get_noisy_reply (&target_buf, &target_buf_size);
11046 if (*target_buf == '\0')
11047 error (_("Target does not support this command."));
11048 if (strcmp (target_buf, "OK") != 0)
11049 error (_("Bogus reply from target: %s"), target_buf);
11053 remote_trace_find (struct target_ops *self,
11054 enum trace_find_type type, int num,
11055 CORE_ADDR addr1, CORE_ADDR addr2,
11058 struct remote_state *rs = get_remote_state ();
11059 char *endbuf = rs->buf + get_remote_packet_size ();
11061 int target_frameno = -1, target_tracept = -1;
11063 /* Lookups other than by absolute frame number depend on the current
11064 trace selected, so make sure it is correct on the remote end
11066 if (type != tfind_number)
11067 set_remote_traceframe ();
11070 strcpy (p, "QTFrame:");
11071 p = strchr (p, '\0');
11075 xsnprintf (p, endbuf - p, "%x", num);
11078 xsnprintf (p, endbuf - p, "pc:%s", phex_nz (addr1, 0));
11081 xsnprintf (p, endbuf - p, "tdp:%x", num);
11084 xsnprintf (p, endbuf - p, "range:%s:%s", phex_nz (addr1, 0),
11085 phex_nz (addr2, 0));
11087 case tfind_outside:
11088 xsnprintf (p, endbuf - p, "outside:%s:%s", phex_nz (addr1, 0),
11089 phex_nz (addr2, 0));
11092 error (_("Unknown trace find type %d"), type);
11096 reply = remote_get_noisy_reply (&(rs->buf), &rs->buf_size);
11097 if (*reply == '\0')
11098 error (_("Target does not support this command."));
11100 while (reply && *reply)
11105 target_frameno = (int) strtol (p, &reply, 16);
11107 error (_("Unable to parse trace frame number"));
11108 /* Don't update our remote traceframe number cache on failure
11109 to select a remote traceframe. */
11110 if (target_frameno == -1)
11115 target_tracept = (int) strtol (p, &reply, 16);
11117 error (_("Unable to parse tracepoint number"));
11119 case 'O': /* "OK"? */
11120 if (reply[1] == 'K' && reply[2] == '\0')
11123 error (_("Bogus reply from target: %s"), reply);
11126 error (_("Bogus reply from target: %s"), reply);
11129 *tpp = target_tracept;
11131 rs->remote_traceframe_number = target_frameno;
11132 return target_frameno;
11136 remote_get_trace_state_variable_value (struct target_ops *self,
11137 int tsvnum, LONGEST *val)
11139 struct remote_state *rs = get_remote_state ();
11143 set_remote_traceframe ();
11145 xsnprintf (rs->buf, get_remote_packet_size (), "qTV:%x", tsvnum);
11147 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11148 if (reply && *reply)
11152 unpack_varlen_hex (reply + 1, &uval);
11153 *val = (LONGEST) uval;
11161 remote_save_trace_data (struct target_ops *self, const char *filename)
11163 struct remote_state *rs = get_remote_state ();
11167 strcpy (p, "QTSave:");
11169 if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ())
11170 error (_("Remote file name too long for trace save packet"));
11171 p += 2 * bin2hex ((gdb_byte *) filename, p, strlen (filename));
11174 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11175 if (*reply == '\0')
11176 error (_("Target does not support this command."));
11177 if (strcmp (reply, "OK") != 0)
11178 error (_("Bogus reply from target: %s"), reply);
11182 /* This is basically a memory transfer, but needs to be its own packet
11183 because we don't know how the target actually organizes its trace
11184 memory, plus we want to be able to ask for as much as possible, but
11185 not be unhappy if we don't get as much as we ask for. */
11188 remote_get_raw_trace_data (struct target_ops *self,
11189 gdb_byte *buf, ULONGEST offset, LONGEST len)
11191 struct remote_state *rs = get_remote_state ();
11197 strcpy (p, "qTBuffer:");
11199 p += hexnumstr (p, offset);
11201 p += hexnumstr (p, len);
11205 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11206 if (reply && *reply)
11208 /* 'l' by itself means we're at the end of the buffer and
11209 there is nothing more to get. */
11213 /* Convert the reply into binary. Limit the number of bytes to
11214 convert according to our passed-in buffer size, rather than
11215 what was returned in the packet; if the target is
11216 unexpectedly generous and gives us a bigger reply than we
11217 asked for, we don't want to crash. */
11218 rslt = hex2bin (target_buf, buf, len);
11222 /* Something went wrong, flag as an error. */
11227 remote_set_disconnected_tracing (struct target_ops *self, int val)
11229 struct remote_state *rs = get_remote_state ();
11231 if (packet_support (PACKET_DisconnectedTracing_feature) == PACKET_ENABLE)
11235 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisconnected:%x", val);
11237 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11238 if (*reply == '\0')
11239 error (_("Target does not support this command."));
11240 if (strcmp (reply, "OK") != 0)
11241 error (_("Bogus reply from target: %s"), reply);
11244 warning (_("Target does not support disconnected tracing."));
11248 remote_core_of_thread (struct target_ops *ops, ptid_t ptid)
11250 struct thread_info *info = find_thread_ptid (ptid);
11252 if (info && info->priv)
11253 return info->priv->core;
11258 remote_set_circular_trace_buffer (struct target_ops *self, int val)
11260 struct remote_state *rs = get_remote_state ();
11263 xsnprintf (rs->buf, get_remote_packet_size (), "QTBuffer:circular:%x", val);
11265 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11266 if (*reply == '\0')
11267 error (_("Target does not support this command."));
11268 if (strcmp (reply, "OK") != 0)
11269 error (_("Bogus reply from target: %s"), reply);
11272 static struct traceframe_info *
11273 remote_traceframe_info (struct target_ops *self)
11277 text = target_read_stralloc (¤t_target,
11278 TARGET_OBJECT_TRACEFRAME_INFO, NULL);
11281 struct traceframe_info *info;
11282 struct cleanup *back_to = make_cleanup (xfree, text);
11284 info = parse_traceframe_info (text);
11285 do_cleanups (back_to);
11292 /* Handle the qTMinFTPILen packet. Returns the minimum length of
11293 instruction on which a fast tracepoint may be placed. Returns -1
11294 if the packet is not supported, and 0 if the minimum instruction
11295 length is unknown. */
11298 remote_get_min_fast_tracepoint_insn_len (struct target_ops *self)
11300 struct remote_state *rs = get_remote_state ();
11303 /* If we're not debugging a process yet, the IPA can't be
11305 if (!target_has_execution)
11308 /* Make sure the remote is pointing at the right process. */
11309 set_general_process ();
11311 xsnprintf (rs->buf, get_remote_packet_size (), "qTMinFTPILen");
11313 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11314 if (*reply == '\0')
11318 ULONGEST min_insn_len;
11320 unpack_varlen_hex (reply, &min_insn_len);
11322 return (int) min_insn_len;
11327 remote_set_trace_buffer_size (struct target_ops *self, LONGEST val)
11329 if (packet_support (PACKET_QTBuffer_size) != PACKET_DISABLE)
11331 struct remote_state *rs = get_remote_state ();
11332 char *buf = rs->buf;
11333 char *endbuf = rs->buf + get_remote_packet_size ();
11334 enum packet_result result;
11336 gdb_assert (val >= 0 || val == -1);
11337 buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:");
11338 /* Send -1 as literal "-1" to avoid host size dependency. */
11342 buf += hexnumstr (buf, (ULONGEST) -val);
11345 buf += hexnumstr (buf, (ULONGEST) val);
11348 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
11349 result = packet_ok (rs->buf,
11350 &remote_protocol_packets[PACKET_QTBuffer_size]);
11352 if (result != PACKET_OK)
11353 warning (_("Bogus reply from target: %s"), rs->buf);
11358 remote_set_trace_notes (struct target_ops *self,
11359 const char *user, const char *notes,
11360 const char *stop_notes)
11362 struct remote_state *rs = get_remote_state ();
11364 char *buf = rs->buf;
11365 char *endbuf = rs->buf + get_remote_packet_size ();
11368 buf += xsnprintf (buf, endbuf - buf, "QTNotes:");
11371 buf += xsnprintf (buf, endbuf - buf, "user:");
11372 nbytes = bin2hex ((gdb_byte *) user, buf, strlen (user));
11378 buf += xsnprintf (buf, endbuf - buf, "notes:");
11379 nbytes = bin2hex ((gdb_byte *) notes, buf, strlen (notes));
11385 buf += xsnprintf (buf, endbuf - buf, "tstop:");
11386 nbytes = bin2hex ((gdb_byte *) stop_notes, buf, strlen (stop_notes));
11390 /* Ensure the buffer is terminated. */
11394 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11395 if (*reply == '\0')
11398 if (strcmp (reply, "OK") != 0)
11399 error (_("Bogus reply from target: %s"), reply);
11405 remote_use_agent (struct target_ops *self, int use)
11407 if (packet_support (PACKET_QAgent) != PACKET_DISABLE)
11409 struct remote_state *rs = get_remote_state ();
11411 /* If the stub supports QAgent. */
11412 xsnprintf (rs->buf, get_remote_packet_size (), "QAgent:%d", use);
11414 getpkt (&rs->buf, &rs->buf_size, 0);
11416 if (strcmp (rs->buf, "OK") == 0)
11427 remote_can_use_agent (struct target_ops *self)
11429 return (packet_support (PACKET_QAgent) != PACKET_DISABLE);
11432 struct btrace_target_info
11434 /* The ptid of the traced thread. */
11437 /* The obtained branch trace configuration. */
11438 struct btrace_config conf;
11441 /* Reset our idea of our target's btrace configuration. */
11444 remote_btrace_reset (void)
11446 struct remote_state *rs = get_remote_state ();
11448 memset (&rs->btrace_config, 0, sizeof (rs->btrace_config));
11451 /* Check whether the target supports branch tracing. */
11454 remote_supports_btrace (struct target_ops *self, enum btrace_format format)
11456 if (packet_support (PACKET_Qbtrace_off) != PACKET_ENABLE)
11458 if (packet_support (PACKET_qXfer_btrace) != PACKET_ENABLE)
11463 case BTRACE_FORMAT_NONE:
11466 case BTRACE_FORMAT_BTS:
11467 return (packet_support (PACKET_Qbtrace_bts) == PACKET_ENABLE);
11470 internal_error (__FILE__, __LINE__, _("Unknown branch trace format"));
11473 /* Synchronize the configuration with the target. */
11476 btrace_sync_conf (const struct btrace_config *conf)
11478 struct packet_config *packet;
11479 struct remote_state *rs;
11480 char *buf, *pos, *endbuf;
11482 rs = get_remote_state ();
11484 endbuf = buf + get_remote_packet_size ();
11486 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_bts_size];
11487 if (packet_config_support (packet) == PACKET_ENABLE
11488 && conf->bts.size != rs->btrace_config.bts.size)
11491 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
11495 getpkt (&buf, &rs->buf_size, 0);
11497 if (packet_ok (buf, packet) == PACKET_ERROR)
11499 if (buf[0] == 'E' && buf[1] == '.')
11500 error (_("Failed to configure the BTS buffer size: %s"), buf + 2);
11502 error (_("Failed to configure the BTS buffer size."));
11505 rs->btrace_config.bts.size = conf->bts.size;
11509 /* Read the current thread's btrace configuration from the target and
11510 store it into CONF. */
11513 btrace_read_config (struct btrace_config *conf)
11517 xml = target_read_stralloc (¤t_target,
11518 TARGET_OBJECT_BTRACE_CONF, "");
11521 struct cleanup *cleanup;
11523 cleanup = make_cleanup (xfree, xml);
11524 parse_xml_btrace_conf (conf, xml);
11525 do_cleanups (cleanup);
11529 /* Enable branch tracing. */
11531 static struct btrace_target_info *
11532 remote_enable_btrace (struct target_ops *self, ptid_t ptid,
11533 const struct btrace_config *conf)
11535 struct btrace_target_info *tinfo = NULL;
11536 struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_bts];
11537 struct remote_state *rs = get_remote_state ();
11538 char *buf = rs->buf;
11539 char *endbuf = rs->buf + get_remote_packet_size ();
11540 volatile struct gdb_exception err;
11542 if (packet_config_support (packet) != PACKET_ENABLE)
11543 error (_("Target does not support branch tracing."));
11545 btrace_sync_conf (conf);
11547 set_general_thread (ptid);
11549 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
11551 getpkt (&rs->buf, &rs->buf_size, 0);
11553 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
11555 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
11556 error (_("Could not enable branch tracing for %s: %s"),
11557 target_pid_to_str (ptid), rs->buf + 2);
11559 error (_("Could not enable branch tracing for %s."),
11560 target_pid_to_str (ptid));
11563 tinfo = xzalloc (sizeof (*tinfo));
11564 tinfo->ptid = ptid;
11566 /* If we fail to read the configuration, we lose some information, but the
11567 tracing itself is not impacted. */
11568 TRY_CATCH (err, RETURN_MASK_ERROR)
11569 btrace_read_config (&tinfo->conf);
11571 if (err.message != NULL)
11572 warning ("%s", err.message);
11577 /* Disable branch tracing. */
11580 remote_disable_btrace (struct target_ops *self,
11581 struct btrace_target_info *tinfo)
11583 struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_off];
11584 struct remote_state *rs = get_remote_state ();
11585 char *buf = rs->buf;
11586 char *endbuf = rs->buf + get_remote_packet_size ();
11588 if (packet_config_support (packet) != PACKET_ENABLE)
11589 error (_("Target does not support branch tracing."));
11591 set_general_thread (tinfo->ptid);
11593 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
11595 getpkt (&rs->buf, &rs->buf_size, 0);
11597 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
11599 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
11600 error (_("Could not disable branch tracing for %s: %s"),
11601 target_pid_to_str (tinfo->ptid), rs->buf + 2);
11603 error (_("Could not disable branch tracing for %s."),
11604 target_pid_to_str (tinfo->ptid));
11610 /* Teardown branch tracing. */
11613 remote_teardown_btrace (struct target_ops *self,
11614 struct btrace_target_info *tinfo)
11616 /* We must not talk to the target during teardown. */
11620 /* Read the branch trace. */
11622 static enum btrace_error
11623 remote_read_btrace (struct target_ops *self,
11624 struct btrace_data *btrace,
11625 struct btrace_target_info *tinfo,
11626 enum btrace_read_type type)
11628 struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace];
11629 struct remote_state *rs = get_remote_state ();
11630 struct cleanup *cleanup;
11634 if (packet_config_support (packet) != PACKET_ENABLE)
11635 error (_("Target does not support branch tracing."));
11637 #if !defined(HAVE_LIBEXPAT)
11638 error (_("Cannot process branch tracing result. XML parsing not supported."));
11643 case BTRACE_READ_ALL:
11646 case BTRACE_READ_NEW:
11649 case BTRACE_READ_DELTA:
11653 internal_error (__FILE__, __LINE__,
11654 _("Bad branch tracing read type: %u."),
11655 (unsigned int) type);
11658 xml = target_read_stralloc (¤t_target,
11659 TARGET_OBJECT_BTRACE, annex);
11661 return BTRACE_ERR_UNKNOWN;
11663 cleanup = make_cleanup (xfree, xml);
11664 parse_xml_btrace (btrace, xml);
11665 do_cleanups (cleanup);
11667 return BTRACE_ERR_NONE;
11670 static const struct btrace_config *
11671 remote_btrace_conf (struct target_ops *self,
11672 const struct btrace_target_info *tinfo)
11674 return &tinfo->conf;
11678 remote_augmented_libraries_svr4_read (struct target_ops *self)
11680 return (packet_support (PACKET_augmented_libraries_svr4_read_feature)
11684 /* Implementation of to_load. */
11687 remote_load (struct target_ops *self, const char *name, int from_tty)
11689 generic_load (name, from_tty);
11693 init_remote_ops (void)
11695 remote_ops.to_shortname = "remote";
11696 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
11697 remote_ops.to_doc =
11698 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
11699 Specify the serial device it is connected to\n\
11700 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
11701 remote_ops.to_open = remote_open;
11702 remote_ops.to_close = remote_close;
11703 remote_ops.to_detach = remote_detach;
11704 remote_ops.to_disconnect = remote_disconnect;
11705 remote_ops.to_resume = remote_resume;
11706 remote_ops.to_wait = remote_wait;
11707 remote_ops.to_fetch_registers = remote_fetch_registers;
11708 remote_ops.to_store_registers = remote_store_registers;
11709 remote_ops.to_prepare_to_store = remote_prepare_to_store;
11710 remote_ops.to_files_info = remote_files_info;
11711 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
11712 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
11713 remote_ops.to_stopped_by_sw_breakpoint = remote_stopped_by_sw_breakpoint;
11714 remote_ops.to_supports_stopped_by_sw_breakpoint = remote_supports_stopped_by_sw_breakpoint;
11715 remote_ops.to_stopped_by_hw_breakpoint = remote_stopped_by_hw_breakpoint;
11716 remote_ops.to_supports_stopped_by_hw_breakpoint = remote_supports_stopped_by_hw_breakpoint;
11717 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
11718 remote_ops.to_stopped_data_address = remote_stopped_data_address;
11719 remote_ops.to_watchpoint_addr_within_range =
11720 remote_watchpoint_addr_within_range;
11721 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
11722 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
11723 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
11724 remote_ops.to_region_ok_for_hw_watchpoint
11725 = remote_region_ok_for_hw_watchpoint;
11726 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
11727 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
11728 remote_ops.to_kill = remote_kill;
11729 remote_ops.to_load = remote_load;
11730 remote_ops.to_mourn_inferior = remote_mourn;
11731 remote_ops.to_pass_signals = remote_pass_signals;
11732 remote_ops.to_program_signals = remote_program_signals;
11733 remote_ops.to_thread_alive = remote_thread_alive;
11734 remote_ops.to_update_thread_list = remote_update_thread_list;
11735 remote_ops.to_pid_to_str = remote_pid_to_str;
11736 remote_ops.to_extra_thread_info = remote_threads_extra_info;
11737 remote_ops.to_get_ada_task_ptid = remote_get_ada_task_ptid;
11738 remote_ops.to_stop = remote_stop;
11739 remote_ops.to_xfer_partial = remote_xfer_partial;
11740 remote_ops.to_rcmd = remote_rcmd;
11741 remote_ops.to_log_command = serial_log_command;
11742 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
11743 remote_ops.to_stratum = process_stratum;
11744 remote_ops.to_has_all_memory = default_child_has_all_memory;
11745 remote_ops.to_has_memory = default_child_has_memory;
11746 remote_ops.to_has_stack = default_child_has_stack;
11747 remote_ops.to_has_registers = default_child_has_registers;
11748 remote_ops.to_has_execution = default_child_has_execution;
11749 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
11750 remote_ops.to_can_execute_reverse = remote_can_execute_reverse;
11751 remote_ops.to_magic = OPS_MAGIC;
11752 remote_ops.to_memory_map = remote_memory_map;
11753 remote_ops.to_flash_erase = remote_flash_erase;
11754 remote_ops.to_flash_done = remote_flash_done;
11755 remote_ops.to_read_description = remote_read_description;
11756 remote_ops.to_search_memory = remote_search_memory;
11757 remote_ops.to_can_async_p = remote_can_async_p;
11758 remote_ops.to_is_async_p = remote_is_async_p;
11759 remote_ops.to_async = remote_async;
11760 remote_ops.to_terminal_inferior = remote_terminal_inferior;
11761 remote_ops.to_terminal_ours = remote_terminal_ours;
11762 remote_ops.to_supports_non_stop = remote_supports_non_stop;
11763 remote_ops.to_supports_multi_process = remote_supports_multi_process;
11764 remote_ops.to_supports_disable_randomization
11765 = remote_supports_disable_randomization;
11766 remote_ops.to_fileio_open = remote_hostio_open;
11767 remote_ops.to_fileio_pwrite = remote_hostio_pwrite;
11768 remote_ops.to_fileio_pread = remote_hostio_pread;
11769 remote_ops.to_fileio_close = remote_hostio_close;
11770 remote_ops.to_fileio_unlink = remote_hostio_unlink;
11771 remote_ops.to_fileio_readlink = remote_hostio_readlink;
11772 remote_ops.to_supports_enable_disable_tracepoint = remote_supports_enable_disable_tracepoint;
11773 remote_ops.to_supports_string_tracing = remote_supports_string_tracing;
11774 remote_ops.to_supports_evaluation_of_breakpoint_conditions = remote_supports_cond_breakpoints;
11775 remote_ops.to_can_run_breakpoint_commands = remote_can_run_breakpoint_commands;
11776 remote_ops.to_trace_init = remote_trace_init;
11777 remote_ops.to_download_tracepoint = remote_download_tracepoint;
11778 remote_ops.to_can_download_tracepoint = remote_can_download_tracepoint;
11779 remote_ops.to_download_trace_state_variable
11780 = remote_download_trace_state_variable;
11781 remote_ops.to_enable_tracepoint = remote_enable_tracepoint;
11782 remote_ops.to_disable_tracepoint = remote_disable_tracepoint;
11783 remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions;
11784 remote_ops.to_trace_start = remote_trace_start;
11785 remote_ops.to_get_trace_status = remote_get_trace_status;
11786 remote_ops.to_get_tracepoint_status = remote_get_tracepoint_status;
11787 remote_ops.to_trace_stop = remote_trace_stop;
11788 remote_ops.to_trace_find = remote_trace_find;
11789 remote_ops.to_get_trace_state_variable_value
11790 = remote_get_trace_state_variable_value;
11791 remote_ops.to_save_trace_data = remote_save_trace_data;
11792 remote_ops.to_upload_tracepoints = remote_upload_tracepoints;
11793 remote_ops.to_upload_trace_state_variables
11794 = remote_upload_trace_state_variables;
11795 remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data;
11796 remote_ops.to_get_min_fast_tracepoint_insn_len = remote_get_min_fast_tracepoint_insn_len;
11797 remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing;
11798 remote_ops.to_set_circular_trace_buffer = remote_set_circular_trace_buffer;
11799 remote_ops.to_set_trace_buffer_size = remote_set_trace_buffer_size;
11800 remote_ops.to_set_trace_notes = remote_set_trace_notes;
11801 remote_ops.to_core_of_thread = remote_core_of_thread;
11802 remote_ops.to_verify_memory = remote_verify_memory;
11803 remote_ops.to_get_tib_address = remote_get_tib_address;
11804 remote_ops.to_set_permissions = remote_set_permissions;
11805 remote_ops.to_static_tracepoint_marker_at
11806 = remote_static_tracepoint_marker_at;
11807 remote_ops.to_static_tracepoint_markers_by_strid
11808 = remote_static_tracepoint_markers_by_strid;
11809 remote_ops.to_traceframe_info = remote_traceframe_info;
11810 remote_ops.to_use_agent = remote_use_agent;
11811 remote_ops.to_can_use_agent = remote_can_use_agent;
11812 remote_ops.to_supports_btrace = remote_supports_btrace;
11813 remote_ops.to_enable_btrace = remote_enable_btrace;
11814 remote_ops.to_disable_btrace = remote_disable_btrace;
11815 remote_ops.to_teardown_btrace = remote_teardown_btrace;
11816 remote_ops.to_read_btrace = remote_read_btrace;
11817 remote_ops.to_btrace_conf = remote_btrace_conf;
11818 remote_ops.to_augmented_libraries_svr4_read =
11819 remote_augmented_libraries_svr4_read;
11822 /* Set up the extended remote vector by making a copy of the standard
11823 remote vector and adding to it. */
11826 init_extended_remote_ops (void)
11828 extended_remote_ops = remote_ops;
11830 extended_remote_ops.to_shortname = "extended-remote";
11831 extended_remote_ops.to_longname =
11832 "Extended remote serial target in gdb-specific protocol";
11833 extended_remote_ops.to_doc =
11834 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
11835 Specify the serial device it is connected to (e.g. /dev/ttya).";
11836 extended_remote_ops.to_open = extended_remote_open;
11837 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
11838 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
11839 extended_remote_ops.to_detach = extended_remote_detach;
11840 extended_remote_ops.to_attach = extended_remote_attach;
11841 extended_remote_ops.to_post_attach = extended_remote_post_attach;
11842 extended_remote_ops.to_kill = extended_remote_kill;
11843 extended_remote_ops.to_supports_disable_randomization
11844 = extended_remote_supports_disable_randomization;
11848 remote_can_async_p (struct target_ops *ops)
11850 struct remote_state *rs = get_remote_state ();
11852 if (!target_async_permitted)
11853 /* We only enable async when the user specifically asks for it. */
11856 /* We're async whenever the serial device is. */
11857 return serial_can_async_p (rs->remote_desc);
11861 remote_is_async_p (struct target_ops *ops)
11863 struct remote_state *rs = get_remote_state ();
11865 if (!target_async_permitted)
11866 /* We only enable async when the user specifically asks for it. */
11869 /* We're async whenever the serial device is. */
11870 return serial_is_async_p (rs->remote_desc);
11873 /* Pass the SERIAL event on and up to the client. One day this code
11874 will be able to delay notifying the client of an event until the
11875 point where an entire packet has been received. */
11877 static serial_event_ftype remote_async_serial_handler;
11880 remote_async_serial_handler (struct serial *scb, void *context)
11882 struct remote_state *rs = context;
11884 /* Don't propogate error information up to the client. Instead let
11885 the client find out about the error by querying the target. */
11886 rs->async_client_callback (INF_REG_EVENT, rs->async_client_context);
11890 remote_async_inferior_event_handler (gdb_client_data data)
11892 inferior_event_handler (INF_REG_EVENT, NULL);
11896 remote_async (struct target_ops *ops,
11897 void (*callback) (enum inferior_event_type event_type,
11901 struct remote_state *rs = get_remote_state ();
11903 if (callback != NULL)
11905 serial_async (rs->remote_desc, remote_async_serial_handler, rs);
11906 rs->async_client_callback = callback;
11907 rs->async_client_context = context;
11909 /* If there are pending events in the stop reply queue tell the
11910 event loop to process them. */
11911 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
11912 mark_async_event_handler (remote_async_inferior_event_token);
11916 serial_async (rs->remote_desc, NULL, NULL);
11917 clear_async_event_handler (remote_async_inferior_event_token);
11922 set_remote_cmd (char *args, int from_tty)
11924 help_list (remote_set_cmdlist, "set remote ", all_commands, gdb_stdout);
11928 show_remote_cmd (char *args, int from_tty)
11930 /* We can't just use cmd_show_list here, because we want to skip
11931 the redundant "show remote Z-packet" and the legacy aliases. */
11932 struct cleanup *showlist_chain;
11933 struct cmd_list_element *list = remote_show_cmdlist;
11934 struct ui_out *uiout = current_uiout;
11936 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
11937 for (; list != NULL; list = list->next)
11938 if (strcmp (list->name, "Z-packet") == 0)
11940 else if (list->type == not_set_cmd)
11941 /* Alias commands are exactly like the original, except they
11942 don't have the normal type. */
11946 struct cleanup *option_chain
11947 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
11949 ui_out_field_string (uiout, "name", list->name);
11950 ui_out_text (uiout, ": ");
11951 if (list->type == show_cmd)
11952 do_show_command ((char *) NULL, from_tty, list);
11954 cmd_func (list, NULL, from_tty);
11955 /* Close the tuple. */
11956 do_cleanups (option_chain);
11959 /* Close the tuple. */
11960 do_cleanups (showlist_chain);
11964 /* Function to be called whenever a new objfile (shlib) is detected. */
11966 remote_new_objfile (struct objfile *objfile)
11968 struct remote_state *rs = get_remote_state ();
11970 if (rs->remote_desc != 0) /* Have a remote connection. */
11971 remote_check_symbols ();
11974 /* Pull all the tracepoints defined on the target and create local
11975 data structures representing them. We don't want to create real
11976 tracepoints yet, we don't want to mess up the user's existing
11980 remote_upload_tracepoints (struct target_ops *self, struct uploaded_tp **utpp)
11982 struct remote_state *rs = get_remote_state ();
11985 /* Ask for a first packet of tracepoint definition. */
11987 getpkt (&rs->buf, &rs->buf_size, 0);
11989 while (*p && *p != 'l')
11991 parse_tracepoint_definition (p, utpp);
11992 /* Ask for another packet of tracepoint definition. */
11994 getpkt (&rs->buf, &rs->buf_size, 0);
12001 remote_upload_trace_state_variables (struct target_ops *self,
12002 struct uploaded_tsv **utsvp)
12004 struct remote_state *rs = get_remote_state ();
12007 /* Ask for a first packet of variable definition. */
12009 getpkt (&rs->buf, &rs->buf_size, 0);
12011 while (*p && *p != 'l')
12013 parse_tsv_definition (p, utsvp);
12014 /* Ask for another packet of variable definition. */
12016 getpkt (&rs->buf, &rs->buf_size, 0);
12022 /* The "set/show range-stepping" show hook. */
12025 show_range_stepping (struct ui_file *file, int from_tty,
12026 struct cmd_list_element *c,
12029 fprintf_filtered (file,
12030 _("Debugger's willingness to use range stepping "
12031 "is %s.\n"), value);
12034 /* The "set/show range-stepping" set hook. */
12037 set_range_stepping (char *ignore_args, int from_tty,
12038 struct cmd_list_element *c)
12040 struct remote_state *rs = get_remote_state ();
12042 /* Whene enabling, check whether range stepping is actually
12043 supported by the target, and warn if not. */
12044 if (use_range_stepping)
12046 if (rs->remote_desc != NULL)
12048 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
12049 remote_vcont_probe (rs);
12051 if (packet_support (PACKET_vCont) == PACKET_ENABLE
12052 && rs->supports_vCont.r)
12056 warning (_("Range stepping is not supported by the current target"));
12061 _initialize_remote (void)
12063 struct remote_state *rs;
12064 struct cmd_list_element *cmd;
12065 const char *cmd_name;
12067 /* architecture specific data */
12068 remote_gdbarch_data_handle =
12069 gdbarch_data_register_post_init (init_remote_state);
12070 remote_g_packet_data_handle =
12071 gdbarch_data_register_pre_init (remote_g_packet_data_init);
12073 /* Initialize the per-target state. At the moment there is only one
12074 of these, not one per target. Only one target is active at a
12076 remote_state = new_remote_state ();
12078 init_remote_ops ();
12079 add_target (&remote_ops);
12081 init_extended_remote_ops ();
12082 add_target (&extended_remote_ops);
12084 /* Hook into new objfile notification. */
12085 observer_attach_new_objfile (remote_new_objfile);
12086 /* We're no longer interested in notification events of an inferior
12088 observer_attach_inferior_exit (discard_pending_stop_replies);
12090 /* Set up signal handlers. */
12091 async_sigint_remote_token =
12092 create_async_signal_handler (async_remote_interrupt, NULL);
12093 async_sigint_remote_twice_token =
12094 create_async_signal_handler (async_remote_interrupt_twice, NULL);
12097 init_remote_threadtests ();
12100 stop_reply_queue = QUEUE_alloc (stop_reply_p, stop_reply_xfree);
12101 /* set/show remote ... */
12103 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
12104 Remote protocol specific variables\n\
12105 Configure various remote-protocol specific variables such as\n\
12106 the packets being used"),
12107 &remote_set_cmdlist, "set remote ",
12108 0 /* allow-unknown */, &setlist);
12109 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
12110 Remote protocol specific variables\n\
12111 Configure various remote-protocol specific variables such as\n\
12112 the packets being used"),
12113 &remote_show_cmdlist, "show remote ",
12114 0 /* allow-unknown */, &showlist);
12116 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
12117 Compare section data on target to the exec file.\n\
12118 Argument is a single section name (default: all loaded sections).\n\
12119 To compare only read-only loaded sections, specify the -r option."),
12122 add_cmd ("packet", class_maintenance, packet_command, _("\
12123 Send an arbitrary packet to a remote target.\n\
12124 maintenance packet TEXT\n\
12125 If GDB is talking to an inferior via the GDB serial protocol, then\n\
12126 this command sends the string TEXT to the inferior, and displays the\n\
12127 response packet. GDB supplies the initial `$' character, and the\n\
12128 terminating `#' character and checksum."),
12131 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
12132 Set whether to send break if interrupted."), _("\
12133 Show whether to send break if interrupted."), _("\
12134 If set, a break, instead of a cntrl-c, is sent to the remote target."),
12135 set_remotebreak, show_remotebreak,
12136 &setlist, &showlist);
12137 cmd_name = "remotebreak";
12138 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
12139 deprecate_cmd (cmd, "set remote interrupt-sequence");
12140 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
12141 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
12142 deprecate_cmd (cmd, "show remote interrupt-sequence");
12144 add_setshow_enum_cmd ("interrupt-sequence", class_support,
12145 interrupt_sequence_modes, &interrupt_sequence_mode,
12147 Set interrupt sequence to remote target."), _("\
12148 Show interrupt sequence to remote target."), _("\
12149 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
12150 NULL, show_interrupt_sequence,
12151 &remote_set_cmdlist,
12152 &remote_show_cmdlist);
12154 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
12155 &interrupt_on_connect, _("\
12156 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
12157 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
12158 If set, interrupt sequence is sent to remote target."),
12160 &remote_set_cmdlist, &remote_show_cmdlist);
12162 /* Install commands for configuring memory read/write packets. */
12164 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
12165 Set the maximum number of bytes per memory write packet (deprecated)."),
12167 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
12168 Show the maximum number of bytes per memory write packet (deprecated)."),
12170 add_cmd ("memory-write-packet-size", no_class,
12171 set_memory_write_packet_size, _("\
12172 Set the maximum number of bytes per memory-write packet.\n\
12173 Specify the number of bytes in a packet or 0 (zero) for the\n\
12174 default packet size. The actual limit is further reduced\n\
12175 dependent on the target. Specify ``fixed'' to disable the\n\
12176 further restriction and ``limit'' to enable that restriction."),
12177 &remote_set_cmdlist);
12178 add_cmd ("memory-read-packet-size", no_class,
12179 set_memory_read_packet_size, _("\
12180 Set the maximum number of bytes per memory-read packet.\n\
12181 Specify the number of bytes in a packet or 0 (zero) for the\n\
12182 default packet size. The actual limit is further reduced\n\
12183 dependent on the target. Specify ``fixed'' to disable the\n\
12184 further restriction and ``limit'' to enable that restriction."),
12185 &remote_set_cmdlist);
12186 add_cmd ("memory-write-packet-size", no_class,
12187 show_memory_write_packet_size,
12188 _("Show the maximum number of bytes per memory-write packet."),
12189 &remote_show_cmdlist);
12190 add_cmd ("memory-read-packet-size", no_class,
12191 show_memory_read_packet_size,
12192 _("Show the maximum number of bytes per memory-read packet."),
12193 &remote_show_cmdlist);
12195 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
12196 &remote_hw_watchpoint_limit, _("\
12197 Set the maximum number of target hardware watchpoints."), _("\
12198 Show the maximum number of target hardware watchpoints."), _("\
12199 Specify a negative limit for unlimited."),
12200 NULL, NULL, /* FIXME: i18n: The maximum
12201 number of target hardware
12202 watchpoints is %s. */
12203 &remote_set_cmdlist, &remote_show_cmdlist);
12204 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class,
12205 &remote_hw_watchpoint_length_limit, _("\
12206 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
12207 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
12208 Specify a negative limit for unlimited."),
12209 NULL, NULL, /* FIXME: i18n: The maximum
12210 length (in bytes) of a target
12211 hardware watchpoint is %s. */
12212 &remote_set_cmdlist, &remote_show_cmdlist);
12213 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
12214 &remote_hw_breakpoint_limit, _("\
12215 Set the maximum number of target hardware breakpoints."), _("\
12216 Show the maximum number of target hardware breakpoints."), _("\
12217 Specify a negative limit for unlimited."),
12218 NULL, NULL, /* FIXME: i18n: The maximum
12219 number of target hardware
12220 breakpoints is %s. */
12221 &remote_set_cmdlist, &remote_show_cmdlist);
12223 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure,
12224 &remote_address_size, _("\
12225 Set the maximum size of the address (in bits) in a memory packet."), _("\
12226 Show the maximum size of the address (in bits) in a memory packet."), NULL,
12228 NULL, /* FIXME: i18n: */
12229 &setlist, &showlist);
12231 init_all_packet_configs ();
12233 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
12234 "X", "binary-download", 1);
12236 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
12237 "vCont", "verbose-resume", 0);
12239 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
12240 "QPassSignals", "pass-signals", 0);
12242 add_packet_config_cmd (&remote_protocol_packets[PACKET_QProgramSignals],
12243 "QProgramSignals", "program-signals", 0);
12245 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
12246 "qSymbol", "symbol-lookup", 0);
12248 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
12249 "P", "set-register", 1);
12251 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
12252 "p", "fetch-register", 1);
12254 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
12255 "Z0", "software-breakpoint", 0);
12257 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
12258 "Z1", "hardware-breakpoint", 0);
12260 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
12261 "Z2", "write-watchpoint", 0);
12263 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
12264 "Z3", "read-watchpoint", 0);
12266 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
12267 "Z4", "access-watchpoint", 0);
12269 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
12270 "qXfer:auxv:read", "read-aux-vector", 0);
12272 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
12273 "qXfer:features:read", "target-features", 0);
12275 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
12276 "qXfer:libraries:read", "library-info", 0);
12278 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4],
12279 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
12281 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
12282 "qXfer:memory-map:read", "memory-map", 0);
12284 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
12285 "qXfer:spu:read", "read-spu-object", 0);
12287 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
12288 "qXfer:spu:write", "write-spu-object", 0);
12290 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
12291 "qXfer:osdata:read", "osdata", 0);
12293 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
12294 "qXfer:threads:read", "threads", 0);
12296 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
12297 "qXfer:siginfo:read", "read-siginfo-object", 0);
12299 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
12300 "qXfer:siginfo:write", "write-siginfo-object", 0);
12302 add_packet_config_cmd
12303 (&remote_protocol_packets[PACKET_qXfer_traceframe_info],
12304 "qXfer:traceframe-info:read", "traceframe-info", 0);
12306 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_uib],
12307 "qXfer:uib:read", "unwind-info-block", 0);
12309 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
12310 "qGetTLSAddr", "get-thread-local-storage-address",
12313 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr],
12314 "qGetTIBAddr", "get-thread-information-block-address",
12317 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
12318 "bc", "reverse-continue", 0);
12320 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
12321 "bs", "reverse-step", 0);
12323 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
12324 "qSupported", "supported-packets", 0);
12326 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
12327 "qSearch:memory", "search-memory", 0);
12329 add_packet_config_cmd (&remote_protocol_packets[PACKET_qTStatus],
12330 "qTStatus", "trace-status", 0);
12332 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
12333 "vFile:open", "hostio-open", 0);
12335 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
12336 "vFile:pread", "hostio-pread", 0);
12338 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
12339 "vFile:pwrite", "hostio-pwrite", 0);
12341 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
12342 "vFile:close", "hostio-close", 0);
12344 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
12345 "vFile:unlink", "hostio-unlink", 0);
12347 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink],
12348 "vFile:readlink", "hostio-readlink", 0);
12350 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
12351 "vAttach", "attach", 0);
12353 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
12356 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
12357 "QStartNoAckMode", "noack", 0);
12359 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
12360 "vKill", "kill", 0);
12362 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
12363 "qAttached", "query-attached", 0);
12365 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
12366 "ConditionalTracepoints",
12367 "conditional-tracepoints", 0);
12369 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints],
12370 "ConditionalBreakpoints",
12371 "conditional-breakpoints", 0);
12373 add_packet_config_cmd (&remote_protocol_packets[PACKET_BreakpointCommands],
12374 "BreakpointCommands",
12375 "breakpoint-commands", 0);
12377 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
12378 "FastTracepoints", "fast-tracepoints", 0);
12380 add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource],
12381 "TracepointSource", "TracepointSource", 0);
12383 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow],
12384 "QAllow", "allow", 0);
12386 add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints],
12387 "StaticTracepoints", "static-tracepoints", 0);
12389 add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace],
12390 "InstallInTrace", "install-in-trace", 0);
12392 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read],
12393 "qXfer:statictrace:read", "read-sdata-object", 0);
12395 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic],
12396 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
12398 add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization],
12399 "QDisableRandomization", "disable-randomization", 0);
12401 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAgent],
12402 "QAgent", "agent", 0);
12404 add_packet_config_cmd (&remote_protocol_packets[PACKET_QTBuffer_size],
12405 "QTBuffer:size", "trace-buffer-size", 0);
12407 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_off],
12408 "Qbtrace:off", "disable-btrace", 0);
12410 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts],
12411 "Qbtrace:bts", "enable-btrace", 0);
12413 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace],
12414 "qXfer:btrace", "read-btrace", 0);
12416 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace_conf],
12417 "qXfer:btrace-conf", "read-btrace-conf", 0);
12419 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_bts_size],
12420 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
12422 add_packet_config_cmd (&remote_protocol_packets[PACKET_swbreak_feature],
12423 "swbreak-feature", "swbreak-feature", 0);
12425 add_packet_config_cmd (&remote_protocol_packets[PACKET_hwbreak_feature],
12426 "hwbreak-feature", "hwbreak-feature", 0);
12428 /* Assert that we've registered commands for all packet configs. */
12432 for (i = 0; i < PACKET_MAX; i++)
12434 /* Ideally all configs would have a command associated. Some
12435 still don't though. */
12440 case PACKET_QNonStop:
12441 case PACKET_multiprocess_feature:
12442 case PACKET_EnableDisableTracepoints_feature:
12443 case PACKET_tracenz_feature:
12444 case PACKET_DisconnectedTracing_feature:
12445 case PACKET_augmented_libraries_svr4_read_feature:
12447 /* Additions to this list need to be well justified:
12448 pre-existing packets are OK; new packets are not. */
12456 /* This catches both forgetting to add a config command, and
12457 forgetting to remove a packet from the exception list. */
12458 gdb_assert (excepted == (remote_protocol_packets[i].name == NULL));
12462 /* Keep the old ``set remote Z-packet ...'' working. Each individual
12463 Z sub-packet has its own set and show commands, but users may
12464 have sets to this variable in their .gdbinit files (or in their
12466 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
12467 &remote_Z_packet_detect, _("\
12468 Set use of remote protocol `Z' packets"), _("\
12469 Show use of remote protocol `Z' packets "), _("\
12470 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
12472 set_remote_protocol_Z_packet_cmd,
12473 show_remote_protocol_Z_packet_cmd,
12474 /* FIXME: i18n: Use of remote protocol
12475 `Z' packets is %s. */
12476 &remote_set_cmdlist, &remote_show_cmdlist);
12478 add_prefix_cmd ("remote", class_files, remote_command, _("\
12479 Manipulate files on the remote system\n\
12480 Transfer files to and from the remote target system."),
12481 &remote_cmdlist, "remote ",
12482 0 /* allow-unknown */, &cmdlist);
12484 add_cmd ("put", class_files, remote_put_command,
12485 _("Copy a local file to the remote system."),
12488 add_cmd ("get", class_files, remote_get_command,
12489 _("Copy a remote file to the local system."),
12492 add_cmd ("delete", class_files, remote_delete_command,
12493 _("Delete a remote file."),
12496 remote_exec_file = xstrdup ("");
12497 add_setshow_string_noescape_cmd ("exec-file", class_files,
12498 &remote_exec_file, _("\
12499 Set the remote pathname for \"run\""), _("\
12500 Show the remote pathname for \"run\""), NULL, NULL, NULL,
12501 &remote_set_cmdlist, &remote_show_cmdlist);
12503 add_setshow_boolean_cmd ("range-stepping", class_run,
12504 &use_range_stepping, _("\
12505 Enable or disable range stepping."), _("\
12506 Show whether target-assisted range stepping is enabled."), _("\
12507 If on, and the target supports it, when stepping a source line, GDB\n\
12508 tells the target to step the corresponding range of addresses itself instead\n\
12509 of issuing multiple single-steps. This speeds up source level\n\
12510 stepping. If off, GDB always issues single-steps, even if range\n\
12511 stepping is supported by the target. The default is on."),
12512 set_range_stepping,
12513 show_range_stepping,
12517 /* Eventually initialize fileio. See fileio.c */
12518 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
12520 /* Take advantage of the fact that the TID field is not used, to tag
12521 special ptids with it set to != 0. */
12522 magic_null_ptid = ptid_build (42000, -1, 1);
12523 not_sent_ptid = ptid_build (42000, -2, 1);
12524 any_thread_ptid = ptid_build (42000, 0, 1);
12526 target_buf_size = 2048;
12527 target_buf = xmalloc (target_buf_size);