| 1 | /* Remote target communications for serial-line targets in custom GDB protocol |
| 2 | |
| 3 | Copyright (C) 1988-2017 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 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. |
| 11 | |
| 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. |
| 16 | |
| 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/>. */ |
| 19 | |
| 20 | /* See the GDB User Guide for details of the GDB remote protocol. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include <ctype.h> |
| 24 | #include <fcntl.h> |
| 25 | #include "inferior.h" |
| 26 | #include "infrun.h" |
| 27 | #include "bfd.h" |
| 28 | #include "symfile.h" |
| 29 | #include "target.h" |
| 30 | /*#include "terminal.h" */ |
| 31 | #include "gdbcmd.h" |
| 32 | #include "objfiles.h" |
| 33 | #include "gdb-stabs.h" |
| 34 | #include "gdbthread.h" |
| 35 | #include "remote.h" |
| 36 | #include "remote-notif.h" |
| 37 | #include "regcache.h" |
| 38 | #include "value.h" |
| 39 | #include "observer.h" |
| 40 | #include "solib.h" |
| 41 | #include "cli/cli-decode.h" |
| 42 | #include "cli/cli-setshow.h" |
| 43 | #include "target-descriptions.h" |
| 44 | #include "gdb_bfd.h" |
| 45 | #include "filestuff.h" |
| 46 | #include "rsp-low.h" |
| 47 | #include "disasm.h" |
| 48 | #include "location.h" |
| 49 | |
| 50 | #include "gdb_sys_time.h" |
| 51 | |
| 52 | #include "event-loop.h" |
| 53 | #include "event-top.h" |
| 54 | #include "inf-loop.h" |
| 55 | |
| 56 | #include <signal.h> |
| 57 | #include "serial.h" |
| 58 | |
| 59 | #include "gdbcore.h" /* for exec_bfd */ |
| 60 | |
| 61 | #include "remote-fileio.h" |
| 62 | #include "gdb/fileio.h" |
| 63 | #include <sys/stat.h> |
| 64 | #include "xml-support.h" |
| 65 | |
| 66 | #include "memory-map.h" |
| 67 | |
| 68 | #include "tracepoint.h" |
| 69 | #include "ax.h" |
| 70 | #include "ax-gdb.h" |
| 71 | #include "agent.h" |
| 72 | #include "btrace.h" |
| 73 | #include "record-btrace.h" |
| 74 | #include <algorithm> |
| 75 | #include "common/scoped_restore.h" |
| 76 | #include "environ.h" |
| 77 | #include "common/byte-vector.h" |
| 78 | |
| 79 | /* Per-program-space data key. */ |
| 80 | static const struct program_space_data *remote_pspace_data; |
| 81 | |
| 82 | /* The variable registered as the control variable used by the |
| 83 | remote exec-file commands. While the remote exec-file setting is |
| 84 | per-program-space, the set/show machinery uses this as the |
| 85 | location of the remote exec-file value. */ |
| 86 | static char *remote_exec_file_var; |
| 87 | |
| 88 | /* The size to align memory write packets, when practical. The protocol |
| 89 | does not guarantee any alignment, and gdb will generate short |
| 90 | writes and unaligned writes, but even as a best-effort attempt this |
| 91 | can improve bulk transfers. For instance, if a write is misaligned |
| 92 | relative to the target's data bus, the stub may need to make an extra |
| 93 | round trip fetching data from the target. This doesn't make a |
| 94 | huge difference, but it's easy to do, so we try to be helpful. |
| 95 | |
| 96 | The alignment chosen is arbitrary; usually data bus width is |
| 97 | important here, not the possibly larger cache line size. */ |
| 98 | enum { REMOTE_ALIGN_WRITES = 16 }; |
| 99 | |
| 100 | /* Prototypes for local functions. */ |
| 101 | static int getpkt_sane (char **buf, long *sizeof_buf, int forever); |
| 102 | static int getpkt_or_notif_sane (char **buf, long *sizeof_buf, |
| 103 | int forever, int *is_notif); |
| 104 | |
| 105 | static void remote_files_info (struct target_ops *ignore); |
| 106 | |
| 107 | static void remote_prepare_to_store (struct target_ops *self, |
| 108 | struct regcache *regcache); |
| 109 | |
| 110 | static void remote_open_1 (const char *, int, struct target_ops *, |
| 111 | int extended_p); |
| 112 | |
| 113 | static void remote_close (struct target_ops *self); |
| 114 | |
| 115 | struct remote_state; |
| 116 | |
| 117 | static int remote_vkill (int pid, struct remote_state *rs); |
| 118 | |
| 119 | static void remote_kill_k (void); |
| 120 | |
| 121 | static void remote_mourn (struct target_ops *ops); |
| 122 | |
| 123 | static void extended_remote_restart (void); |
| 124 | |
| 125 | static void remote_send (char **buf, long *sizeof_buf_p); |
| 126 | |
| 127 | static int readchar (int timeout); |
| 128 | |
| 129 | static void remote_serial_write (const char *str, int len); |
| 130 | |
| 131 | static void remote_kill (struct target_ops *ops); |
| 132 | |
| 133 | static int remote_can_async_p (struct target_ops *); |
| 134 | |
| 135 | static int remote_is_async_p (struct target_ops *); |
| 136 | |
| 137 | static void remote_async (struct target_ops *ops, int enable); |
| 138 | |
| 139 | static void remote_thread_events (struct target_ops *ops, int enable); |
| 140 | |
| 141 | static void interrupt_query (void); |
| 142 | |
| 143 | static void set_general_thread (ptid_t ptid); |
| 144 | static void set_continue_thread (ptid_t ptid); |
| 145 | |
| 146 | static void get_offsets (void); |
| 147 | |
| 148 | static void skip_frame (void); |
| 149 | |
| 150 | static long read_frame (char **buf_p, long *sizeof_buf); |
| 151 | |
| 152 | static int hexnumlen (ULONGEST num); |
| 153 | |
| 154 | static void init_remote_ops (void); |
| 155 | |
| 156 | static void init_extended_remote_ops (void); |
| 157 | |
| 158 | static void remote_stop (struct target_ops *self, ptid_t); |
| 159 | |
| 160 | static int stubhex (int ch); |
| 161 | |
| 162 | static int hexnumstr (char *, ULONGEST); |
| 163 | |
| 164 | static int hexnumnstr (char *, ULONGEST, int); |
| 165 | |
| 166 | static CORE_ADDR remote_address_masked (CORE_ADDR); |
| 167 | |
| 168 | static void print_packet (const char *); |
| 169 | |
| 170 | static int stub_unpack_int (char *buff, int fieldlength); |
| 171 | |
| 172 | static ptid_t remote_current_thread (ptid_t oldptid); |
| 173 | |
| 174 | static int putpkt_binary (const char *buf, int cnt); |
| 175 | |
| 176 | static void check_binary_download (CORE_ADDR addr); |
| 177 | |
| 178 | struct packet_config; |
| 179 | |
| 180 | static void show_packet_config_cmd (struct packet_config *config); |
| 181 | |
| 182 | static void show_remote_protocol_packet_cmd (struct ui_file *file, |
| 183 | int from_tty, |
| 184 | struct cmd_list_element *c, |
| 185 | const char *value); |
| 186 | |
| 187 | static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid); |
| 188 | static ptid_t read_ptid (const char *buf, const char **obuf); |
| 189 | |
| 190 | static void remote_set_permissions (struct target_ops *self); |
| 191 | |
| 192 | static int remote_get_trace_status (struct target_ops *self, |
| 193 | struct trace_status *ts); |
| 194 | |
| 195 | static int remote_upload_tracepoints (struct target_ops *self, |
| 196 | struct uploaded_tp **utpp); |
| 197 | |
| 198 | static int remote_upload_trace_state_variables (struct target_ops *self, |
| 199 | struct uploaded_tsv **utsvp); |
| 200 | |
| 201 | static void remote_query_supported (void); |
| 202 | |
| 203 | static void remote_check_symbols (void); |
| 204 | |
| 205 | struct stop_reply; |
| 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); |
| 211 | |
| 212 | struct threads_listing_context; |
| 213 | static void remove_new_fork_children (struct threads_listing_context *); |
| 214 | |
| 215 | static void remote_async_inferior_event_handler (gdb_client_data); |
| 216 | |
| 217 | static void remote_terminal_ours (struct target_ops *self); |
| 218 | |
| 219 | static int remote_read_description_p (struct target_ops *target); |
| 220 | |
| 221 | static void remote_console_output (char *msg); |
| 222 | |
| 223 | static int remote_supports_cond_breakpoints (struct target_ops *self); |
| 224 | |
| 225 | static int remote_can_run_breakpoint_commands (struct target_ops *self); |
| 226 | |
| 227 | static void remote_btrace_reset (void); |
| 228 | |
| 229 | static void remote_btrace_maybe_reopen (void); |
| 230 | |
| 231 | static int stop_reply_queue_length (void); |
| 232 | |
| 233 | static void readahead_cache_invalidate (void); |
| 234 | |
| 235 | static void remote_unpush_and_throw (void); |
| 236 | |
| 237 | static struct remote_state *get_remote_state (void); |
| 238 | |
| 239 | /* For "remote". */ |
| 240 | |
| 241 | static struct cmd_list_element *remote_cmdlist; |
| 242 | |
| 243 | /* For "set remote" and "show remote". */ |
| 244 | |
| 245 | static struct cmd_list_element *remote_set_cmdlist; |
| 246 | static struct cmd_list_element *remote_show_cmdlist; |
| 247 | |
| 248 | /* Stub vCont actions support. |
| 249 | |
| 250 | Each field is a boolean flag indicating whether the stub reports |
| 251 | support for the corresponding action. */ |
| 252 | |
| 253 | struct vCont_action_support |
| 254 | { |
| 255 | /* vCont;t */ |
| 256 | int t; |
| 257 | |
| 258 | /* vCont;r */ |
| 259 | int r; |
| 260 | |
| 261 | /* vCont;s */ |
| 262 | int s; |
| 263 | |
| 264 | /* vCont;S */ |
| 265 | int S; |
| 266 | }; |
| 267 | |
| 268 | /* Controls whether GDB is willing to use range stepping. */ |
| 269 | |
| 270 | static int use_range_stepping = 1; |
| 271 | |
| 272 | #define OPAQUETHREADBYTES 8 |
| 273 | |
| 274 | /* a 64 bit opaque identifier */ |
| 275 | typedef unsigned char threadref[OPAQUETHREADBYTES]; |
| 276 | |
| 277 | /* About this many threadisds fit in a packet. */ |
| 278 | |
| 279 | #define MAXTHREADLISTRESULTS 32 |
| 280 | |
| 281 | /* The max number of chars in debug output. The rest of chars are |
| 282 | omitted. */ |
| 283 | |
| 284 | #define REMOTE_DEBUG_MAX_CHAR 512 |
| 285 | |
| 286 | /* Data for the vFile:pread readahead cache. */ |
| 287 | |
| 288 | struct readahead_cache |
| 289 | { |
| 290 | /* The file descriptor for the file that is being cached. -1 if the |
| 291 | cache is invalid. */ |
| 292 | int fd; |
| 293 | |
| 294 | /* The offset into the file that the cache buffer corresponds |
| 295 | to. */ |
| 296 | ULONGEST offset; |
| 297 | |
| 298 | /* The buffer holding the cache contents. */ |
| 299 | gdb_byte *buf; |
| 300 | /* The buffer's size. We try to read as much as fits into a packet |
| 301 | at a time. */ |
| 302 | size_t bufsize; |
| 303 | |
| 304 | /* Cache hit and miss counters. */ |
| 305 | ULONGEST hit_count; |
| 306 | ULONGEST miss_count; |
| 307 | }; |
| 308 | |
| 309 | /* Description of the remote protocol state for the currently |
| 310 | connected target. This is per-target state, and independent of the |
| 311 | selected architecture. */ |
| 312 | |
| 313 | struct remote_state |
| 314 | { |
| 315 | /* A buffer to use for incoming packets, and its current size. The |
| 316 | buffer is grown dynamically for larger incoming packets. |
| 317 | Outgoing packets may also be constructed in this buffer. |
| 318 | BUF_SIZE is always at least REMOTE_PACKET_SIZE; |
| 319 | REMOTE_PACKET_SIZE should be used to limit the length of outgoing |
| 320 | packets. */ |
| 321 | char *buf; |
| 322 | long buf_size; |
| 323 | |
| 324 | /* True if we're going through initial connection setup (finding out |
| 325 | about the remote side's threads, relocating symbols, etc.). */ |
| 326 | int starting_up; |
| 327 | |
| 328 | /* If we negotiated packet size explicitly (and thus can bypass |
| 329 | heuristics for the largest packet size that will not overflow |
| 330 | a buffer in the stub), this will be set to that packet size. |
| 331 | Otherwise zero, meaning to use the guessed size. */ |
| 332 | long explicit_packet_size; |
| 333 | |
| 334 | /* remote_wait is normally called when the target is running and |
| 335 | waits for a stop reply packet. But sometimes we need to call it |
| 336 | when the target is already stopped. We can send a "?" packet |
| 337 | and have remote_wait read the response. Or, if we already have |
| 338 | the response, we can stash it in BUF and tell remote_wait to |
| 339 | skip calling getpkt. This flag is set when BUF contains a |
| 340 | stop reply packet and the target is not waiting. */ |
| 341 | int cached_wait_status; |
| 342 | |
| 343 | /* True, if in no ack mode. That is, neither GDB nor the stub will |
| 344 | expect acks from each other. The connection is assumed to be |
| 345 | reliable. */ |
| 346 | int noack_mode; |
| 347 | |
| 348 | /* True if we're connected in extended remote mode. */ |
| 349 | int extended; |
| 350 | |
| 351 | /* True if we resumed the target and we're waiting for the target to |
| 352 | stop. In the mean time, we can't start another command/query. |
| 353 | The remote server wouldn't be ready to process it, so we'd |
| 354 | timeout waiting for a reply that would never come and eventually |
| 355 | we'd close the connection. This can happen in asynchronous mode |
| 356 | because we allow GDB commands while the target is running. */ |
| 357 | int waiting_for_stop_reply; |
| 358 | |
| 359 | /* The status of the stub support for the various vCont actions. */ |
| 360 | struct vCont_action_support supports_vCont; |
| 361 | |
| 362 | /* Nonzero if the user has pressed Ctrl-C, but the target hasn't |
| 363 | responded to that. */ |
| 364 | int ctrlc_pending_p; |
| 365 | |
| 366 | /* True if we saw a Ctrl-C while reading or writing from/to the |
| 367 | remote descriptor. At that point it is not safe to send a remote |
| 368 | interrupt packet, so we instead remember we saw the Ctrl-C and |
| 369 | process it once we're done with sending/receiving the current |
| 370 | packet, which should be shortly. If however that takes too long, |
| 371 | and the user presses Ctrl-C again, we offer to disconnect. */ |
| 372 | int got_ctrlc_during_io; |
| 373 | |
| 374 | /* Descriptor for I/O to remote machine. Initialize it to NULL so that |
| 375 | remote_open knows that we don't have a file open when the program |
| 376 | starts. */ |
| 377 | struct serial *remote_desc; |
| 378 | |
| 379 | /* These are the threads which we last sent to the remote system. The |
| 380 | TID member will be -1 for all or -2 for not sent yet. */ |
| 381 | ptid_t general_thread; |
| 382 | ptid_t continue_thread; |
| 383 | |
| 384 | /* This is the traceframe which we last selected on the remote system. |
| 385 | It will be -1 if no traceframe is selected. */ |
| 386 | int remote_traceframe_number; |
| 387 | |
| 388 | char *last_pass_packet; |
| 389 | |
| 390 | /* The last QProgramSignals packet sent to the target. We bypass |
| 391 | sending a new program signals list down to the target if the new |
| 392 | packet is exactly the same as the last we sent. IOW, we only let |
| 393 | the target know about program signals list changes. */ |
| 394 | char *last_program_signals_packet; |
| 395 | |
| 396 | enum gdb_signal last_sent_signal; |
| 397 | |
| 398 | int last_sent_step; |
| 399 | |
| 400 | /* The execution direction of the last resume we got. */ |
| 401 | enum exec_direction_kind last_resume_exec_dir; |
| 402 | |
| 403 | char *finished_object; |
| 404 | char *finished_annex; |
| 405 | ULONGEST finished_offset; |
| 406 | |
| 407 | /* Should we try the 'ThreadInfo' query packet? |
| 408 | |
| 409 | This variable (NOT available to the user: auto-detect only!) |
| 410 | determines whether GDB will use the new, simpler "ThreadInfo" |
| 411 | query or the older, more complex syntax for thread queries. |
| 412 | This is an auto-detect variable (set to true at each connect, |
| 413 | and set to false when the target fails to recognize it). */ |
| 414 | int use_threadinfo_query; |
| 415 | int use_threadextra_query; |
| 416 | |
| 417 | threadref echo_nextthread; |
| 418 | threadref nextthread; |
| 419 | threadref resultthreadlist[MAXTHREADLISTRESULTS]; |
| 420 | |
| 421 | /* The state of remote notification. */ |
| 422 | struct remote_notif_state *notif_state; |
| 423 | |
| 424 | /* The branch trace configuration. */ |
| 425 | struct btrace_config btrace_config; |
| 426 | |
| 427 | /* The argument to the last "vFile:setfs:" packet we sent, used |
| 428 | to avoid sending repeated unnecessary "vFile:setfs:" packets. |
| 429 | Initialized to -1 to indicate that no "vFile:setfs:" packet |
| 430 | has yet been sent. */ |
| 431 | int fs_pid; |
| 432 | |
| 433 | /* A readahead cache for vFile:pread. Often, reading a binary |
| 434 | involves a sequence of small reads. E.g., when parsing an ELF |
| 435 | file. A readahead cache helps mostly the case of remote |
| 436 | debugging on a connection with higher latency, due to the |
| 437 | request/reply nature of the RSP. We only cache data for a single |
| 438 | file descriptor at a time. */ |
| 439 | struct readahead_cache readahead_cache; |
| 440 | }; |
| 441 | |
| 442 | /* Private data that we'll store in (struct thread_info)->private. */ |
| 443 | struct private_thread_info |
| 444 | { |
| 445 | char *extra; |
| 446 | char *name; |
| 447 | int core; |
| 448 | |
| 449 | /* Thread handle, perhaps a pthread_t or thread_t value, stored as a |
| 450 | sequence of bytes. */ |
| 451 | gdb::byte_vector *thread_handle; |
| 452 | |
| 453 | /* Whether the target stopped for a breakpoint/watchpoint. */ |
| 454 | enum target_stop_reason stop_reason; |
| 455 | |
| 456 | /* This is set to the data address of the access causing the target |
| 457 | to stop for a watchpoint. */ |
| 458 | CORE_ADDR watch_data_address; |
| 459 | |
| 460 | /* Fields used by the vCont action coalescing implemented in |
| 461 | remote_resume / remote_commit_resume. remote_resume stores each |
| 462 | thread's last resume request in these fields, so that a later |
| 463 | remote_commit_resume knows which is the proper action for this |
| 464 | thread to include in the vCont packet. */ |
| 465 | |
| 466 | /* True if the last target_resume call for this thread was a step |
| 467 | request, false if a continue request. */ |
| 468 | int last_resume_step; |
| 469 | |
| 470 | /* The signal specified in the last target_resume call for this |
| 471 | thread. */ |
| 472 | enum gdb_signal last_resume_sig; |
| 473 | |
| 474 | /* Whether this thread was already vCont-resumed on the remote |
| 475 | side. */ |
| 476 | int vcont_resumed; |
| 477 | }; |
| 478 | |
| 479 | static void |
| 480 | free_private_thread_info (struct private_thread_info *info) |
| 481 | { |
| 482 | xfree (info->extra); |
| 483 | xfree (info->name); |
| 484 | delete info->thread_handle; |
| 485 | xfree (info); |
| 486 | } |
| 487 | |
| 488 | /* This data could be associated with a target, but we do not always |
| 489 | have access to the current target when we need it, so for now it is |
| 490 | static. This will be fine for as long as only one target is in use |
| 491 | at a time. */ |
| 492 | static struct remote_state *remote_state; |
| 493 | |
| 494 | static struct remote_state * |
| 495 | get_remote_state_raw (void) |
| 496 | { |
| 497 | return remote_state; |
| 498 | } |
| 499 | |
| 500 | /* Allocate a new struct remote_state with xmalloc, initialize it, and |
| 501 | return it. */ |
| 502 | |
| 503 | static struct remote_state * |
| 504 | new_remote_state (void) |
| 505 | { |
| 506 | struct remote_state *result = XCNEW (struct remote_state); |
| 507 | |
| 508 | /* The default buffer size is unimportant; it will be expanded |
| 509 | whenever a larger buffer is needed. */ |
| 510 | result->buf_size = 400; |
| 511 | result->buf = (char *) xmalloc (result->buf_size); |
| 512 | result->remote_traceframe_number = -1; |
| 513 | result->last_sent_signal = GDB_SIGNAL_0; |
| 514 | result->last_resume_exec_dir = EXEC_FORWARD; |
| 515 | result->fs_pid = -1; |
| 516 | |
| 517 | return result; |
| 518 | } |
| 519 | |
| 520 | /* Description of the remote protocol for a given architecture. */ |
| 521 | |
| 522 | struct packet_reg |
| 523 | { |
| 524 | long offset; /* Offset into G packet. */ |
| 525 | long regnum; /* GDB's internal register number. */ |
| 526 | LONGEST pnum; /* Remote protocol register number. */ |
| 527 | int in_g_packet; /* Always part of G packet. */ |
| 528 | /* long size in bytes; == register_size (target_gdbarch (), regnum); |
| 529 | at present. */ |
| 530 | /* char *name; == gdbarch_register_name (target_gdbarch (), regnum); |
| 531 | at present. */ |
| 532 | }; |
| 533 | |
| 534 | struct remote_arch_state |
| 535 | { |
| 536 | /* Description of the remote protocol registers. */ |
| 537 | long sizeof_g_packet; |
| 538 | |
| 539 | /* Description of the remote protocol registers indexed by REGNUM |
| 540 | (making an array gdbarch_num_regs in size). */ |
| 541 | struct packet_reg *regs; |
| 542 | |
| 543 | /* This is the size (in chars) of the first response to the ``g'' |
| 544 | packet. It is used as a heuristic when determining the maximum |
| 545 | size of memory-read and memory-write packets. A target will |
| 546 | typically only reserve a buffer large enough to hold the ``g'' |
| 547 | packet. The size does not include packet overhead (headers and |
| 548 | trailers). */ |
| 549 | long actual_register_packet_size; |
| 550 | |
| 551 | /* This is the maximum size (in chars) of a non read/write packet. |
| 552 | It is also used as a cap on the size of read/write packets. */ |
| 553 | long remote_packet_size; |
| 554 | }; |
| 555 | |
| 556 | /* Utility: generate error from an incoming stub packet. */ |
| 557 | static void |
| 558 | trace_error (char *buf) |
| 559 | { |
| 560 | if (*buf++ != 'E') |
| 561 | return; /* not an error msg */ |
| 562 | switch (*buf) |
| 563 | { |
| 564 | case '1': /* malformed packet error */ |
| 565 | if (*++buf == '0') /* general case: */ |
| 566 | error (_("remote.c: error in outgoing packet.")); |
| 567 | else |
| 568 | error (_("remote.c: error in outgoing packet at field #%ld."), |
| 569 | strtol (buf, NULL, 16)); |
| 570 | default: |
| 571 | error (_("Target returns error code '%s'."), buf); |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | /* Utility: wait for reply from stub, while accepting "O" packets. */ |
| 576 | |
| 577 | static char * |
| 578 | remote_get_noisy_reply () |
| 579 | { |
| 580 | struct remote_state *rs = get_remote_state (); |
| 581 | |
| 582 | do /* Loop on reply from remote stub. */ |
| 583 | { |
| 584 | char *buf; |
| 585 | |
| 586 | QUIT; /* Allow user to bail out with ^C. */ |
| 587 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 588 | buf = rs->buf; |
| 589 | if (buf[0] == 'E') |
| 590 | trace_error (buf); |
| 591 | else if (startswith (buf, "qRelocInsn:")) |
| 592 | { |
| 593 | ULONGEST ul; |
| 594 | CORE_ADDR from, to, org_to; |
| 595 | const char *p, *pp; |
| 596 | int adjusted_size = 0; |
| 597 | int relocated = 0; |
| 598 | |
| 599 | p = buf + strlen ("qRelocInsn:"); |
| 600 | pp = unpack_varlen_hex (p, &ul); |
| 601 | if (*pp != ';') |
| 602 | error (_("invalid qRelocInsn packet: %s"), buf); |
| 603 | from = ul; |
| 604 | |
| 605 | p = pp + 1; |
| 606 | unpack_varlen_hex (p, &ul); |
| 607 | to = ul; |
| 608 | |
| 609 | org_to = to; |
| 610 | |
| 611 | TRY |
| 612 | { |
| 613 | gdbarch_relocate_instruction (target_gdbarch (), &to, from); |
| 614 | relocated = 1; |
| 615 | } |
| 616 | CATCH (ex, RETURN_MASK_ALL) |
| 617 | { |
| 618 | if (ex.error == MEMORY_ERROR) |
| 619 | { |
| 620 | /* Propagate memory errors silently back to the |
| 621 | target. The stub may have limited the range of |
| 622 | addresses we can write to, for example. */ |
| 623 | } |
| 624 | else |
| 625 | { |
| 626 | /* Something unexpectedly bad happened. Be verbose |
| 627 | so we can tell what, and propagate the error back |
| 628 | to the stub, so it doesn't get stuck waiting for |
| 629 | a response. */ |
| 630 | exception_fprintf (gdb_stderr, ex, |
| 631 | _("warning: relocating instruction: ")); |
| 632 | } |
| 633 | putpkt ("E01"); |
| 634 | } |
| 635 | END_CATCH |
| 636 | |
| 637 | if (relocated) |
| 638 | { |
| 639 | adjusted_size = to - org_to; |
| 640 | |
| 641 | xsnprintf (buf, rs->buf_size, "qRelocInsn:%x", adjusted_size); |
| 642 | putpkt (buf); |
| 643 | } |
| 644 | } |
| 645 | else if (buf[0] == 'O' && buf[1] != 'K') |
| 646 | remote_console_output (buf + 1); /* 'O' message from stub */ |
| 647 | else |
| 648 | return buf; /* Here's the actual reply. */ |
| 649 | } |
| 650 | while (1); |
| 651 | } |
| 652 | |
| 653 | /* Handle for retreving the remote protocol data from gdbarch. */ |
| 654 | static struct gdbarch_data *remote_gdbarch_data_handle; |
| 655 | |
| 656 | static struct remote_arch_state * |
| 657 | get_remote_arch_state (struct gdbarch *gdbarch) |
| 658 | { |
| 659 | gdb_assert (gdbarch != NULL); |
| 660 | return ((struct remote_arch_state *) |
| 661 | gdbarch_data (gdbarch, remote_gdbarch_data_handle)); |
| 662 | } |
| 663 | |
| 664 | /* Fetch the global remote target state. */ |
| 665 | |
| 666 | static struct remote_state * |
| 667 | get_remote_state (void) |
| 668 | { |
| 669 | /* Make sure that the remote architecture state has been |
| 670 | initialized, because doing so might reallocate rs->buf. Any |
| 671 | function which calls getpkt also needs to be mindful of changes |
| 672 | to rs->buf, but this call limits the number of places which run |
| 673 | into trouble. */ |
| 674 | get_remote_arch_state (target_gdbarch ()); |
| 675 | |
| 676 | return get_remote_state_raw (); |
| 677 | } |
| 678 | |
| 679 | /* Cleanup routine for the remote module's pspace data. */ |
| 680 | |
| 681 | static void |
| 682 | remote_pspace_data_cleanup (struct program_space *pspace, void *arg) |
| 683 | { |
| 684 | char *remote_exec_file = (char *) arg; |
| 685 | |
| 686 | xfree (remote_exec_file); |
| 687 | } |
| 688 | |
| 689 | /* Fetch the remote exec-file from the current program space. */ |
| 690 | |
| 691 | static const char * |
| 692 | get_remote_exec_file (void) |
| 693 | { |
| 694 | char *remote_exec_file; |
| 695 | |
| 696 | remote_exec_file |
| 697 | = (char *) program_space_data (current_program_space, |
| 698 | remote_pspace_data); |
| 699 | if (remote_exec_file == NULL) |
| 700 | return ""; |
| 701 | |
| 702 | return remote_exec_file; |
| 703 | } |
| 704 | |
| 705 | /* Set the remote exec file for PSPACE. */ |
| 706 | |
| 707 | static void |
| 708 | set_pspace_remote_exec_file (struct program_space *pspace, |
| 709 | char *remote_exec_file) |
| 710 | { |
| 711 | char *old_file = (char *) program_space_data (pspace, remote_pspace_data); |
| 712 | |
| 713 | xfree (old_file); |
| 714 | set_program_space_data (pspace, remote_pspace_data, |
| 715 | xstrdup (remote_exec_file)); |
| 716 | } |
| 717 | |
| 718 | /* The "set/show remote exec-file" set command hook. */ |
| 719 | |
| 720 | static void |
| 721 | set_remote_exec_file (char *ignored, int from_tty, |
| 722 | struct cmd_list_element *c) |
| 723 | { |
| 724 | gdb_assert (remote_exec_file_var != NULL); |
| 725 | set_pspace_remote_exec_file (current_program_space, remote_exec_file_var); |
| 726 | } |
| 727 | |
| 728 | /* The "set/show remote exec-file" show command hook. */ |
| 729 | |
| 730 | static void |
| 731 | show_remote_exec_file (struct ui_file *file, int from_tty, |
| 732 | struct cmd_list_element *cmd, const char *value) |
| 733 | { |
| 734 | fprintf_filtered (file, "%s\n", remote_exec_file_var); |
| 735 | } |
| 736 | |
| 737 | static int |
| 738 | compare_pnums (const void *lhs_, const void *rhs_) |
| 739 | { |
| 740 | const struct packet_reg * const *lhs |
| 741 | = (const struct packet_reg * const *) lhs_; |
| 742 | const struct packet_reg * const *rhs |
| 743 | = (const struct packet_reg * const *) rhs_; |
| 744 | |
| 745 | if ((*lhs)->pnum < (*rhs)->pnum) |
| 746 | return -1; |
| 747 | else if ((*lhs)->pnum == (*rhs)->pnum) |
| 748 | return 0; |
| 749 | else |
| 750 | return 1; |
| 751 | } |
| 752 | |
| 753 | static int |
| 754 | map_regcache_remote_table (struct gdbarch *gdbarch, struct packet_reg *regs) |
| 755 | { |
| 756 | int regnum, num_remote_regs, offset; |
| 757 | struct packet_reg **remote_regs; |
| 758 | |
| 759 | for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++) |
| 760 | { |
| 761 | struct packet_reg *r = ®s[regnum]; |
| 762 | |
| 763 | if (register_size (gdbarch, regnum) == 0) |
| 764 | /* Do not try to fetch zero-sized (placeholder) registers. */ |
| 765 | r->pnum = -1; |
| 766 | else |
| 767 | r->pnum = gdbarch_remote_register_number (gdbarch, regnum); |
| 768 | |
| 769 | r->regnum = regnum; |
| 770 | } |
| 771 | |
| 772 | /* Define the g/G packet format as the contents of each register |
| 773 | with a remote protocol number, in order of ascending protocol |
| 774 | number. */ |
| 775 | |
| 776 | remote_regs = XALLOCAVEC (struct packet_reg *, gdbarch_num_regs (gdbarch)); |
| 777 | for (num_remote_regs = 0, regnum = 0; |
| 778 | regnum < gdbarch_num_regs (gdbarch); |
| 779 | regnum++) |
| 780 | if (regs[regnum].pnum != -1) |
| 781 | remote_regs[num_remote_regs++] = ®s[regnum]; |
| 782 | |
| 783 | qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *), |
| 784 | compare_pnums); |
| 785 | |
| 786 | for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++) |
| 787 | { |
| 788 | remote_regs[regnum]->in_g_packet = 1; |
| 789 | remote_regs[regnum]->offset = offset; |
| 790 | offset += register_size (gdbarch, remote_regs[regnum]->regnum); |
| 791 | } |
| 792 | |
| 793 | return offset; |
| 794 | } |
| 795 | |
| 796 | /* Given the architecture described by GDBARCH, return the remote |
| 797 | protocol register's number and the register's offset in the g/G |
| 798 | packets of GDB register REGNUM, in PNUM and POFFSET respectively. |
| 799 | If the target does not have a mapping for REGNUM, return false, |
| 800 | otherwise, return true. */ |
| 801 | |
| 802 | int |
| 803 | remote_register_number_and_offset (struct gdbarch *gdbarch, int regnum, |
| 804 | int *pnum, int *poffset) |
| 805 | { |
| 806 | gdb_assert (regnum < gdbarch_num_regs (gdbarch)); |
| 807 | |
| 808 | std::vector<packet_reg> regs (gdbarch_num_regs (gdbarch)); |
| 809 | |
| 810 | map_regcache_remote_table (gdbarch, regs.data ()); |
| 811 | |
| 812 | *pnum = regs[regnum].pnum; |
| 813 | *poffset = regs[regnum].offset; |
| 814 | |
| 815 | return *pnum != -1; |
| 816 | } |
| 817 | |
| 818 | static void * |
| 819 | init_remote_state (struct gdbarch *gdbarch) |
| 820 | { |
| 821 | struct remote_state *rs = get_remote_state_raw (); |
| 822 | struct remote_arch_state *rsa; |
| 823 | |
| 824 | rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state); |
| 825 | |
| 826 | /* Use the architecture to build a regnum<->pnum table, which will be |
| 827 | 1:1 unless a feature set specifies otherwise. */ |
| 828 | rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch, |
| 829 | gdbarch_num_regs (gdbarch), |
| 830 | struct packet_reg); |
| 831 | |
| 832 | /* Record the maximum possible size of the g packet - it may turn out |
| 833 | to be smaller. */ |
| 834 | rsa->sizeof_g_packet = map_regcache_remote_table (gdbarch, rsa->regs); |
| 835 | |
| 836 | /* Default maximum number of characters in a packet body. Many |
| 837 | remote stubs have a hardwired buffer size of 400 bytes |
| 838 | (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used |
| 839 | as the maximum packet-size to ensure that the packet and an extra |
| 840 | NUL character can always fit in the buffer. This stops GDB |
| 841 | trashing stubs that try to squeeze an extra NUL into what is |
| 842 | already a full buffer (As of 1999-12-04 that was most stubs). */ |
| 843 | rsa->remote_packet_size = 400 - 1; |
| 844 | |
| 845 | /* This one is filled in when a ``g'' packet is received. */ |
| 846 | rsa->actual_register_packet_size = 0; |
| 847 | |
| 848 | /* Should rsa->sizeof_g_packet needs more space than the |
| 849 | default, adjust the size accordingly. Remember that each byte is |
| 850 | encoded as two characters. 32 is the overhead for the packet |
| 851 | header / footer. NOTE: cagney/1999-10-26: I suspect that 8 |
| 852 | (``$NN:G...#NN'') is a better guess, the below has been padded a |
| 853 | little. */ |
| 854 | if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2)) |
| 855 | rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32); |
| 856 | |
| 857 | /* Make sure that the packet buffer is plenty big enough for |
| 858 | this architecture. */ |
| 859 | if (rs->buf_size < rsa->remote_packet_size) |
| 860 | { |
| 861 | rs->buf_size = 2 * rsa->remote_packet_size; |
| 862 | rs->buf = (char *) xrealloc (rs->buf, rs->buf_size); |
| 863 | } |
| 864 | |
| 865 | return rsa; |
| 866 | } |
| 867 | |
| 868 | /* Return the current allowed size of a remote packet. This is |
| 869 | inferred from the current architecture, and should be used to |
| 870 | limit the length of outgoing packets. */ |
| 871 | static long |
| 872 | get_remote_packet_size (void) |
| 873 | { |
| 874 | struct remote_state *rs = get_remote_state (); |
| 875 | remote_arch_state *rsa = get_remote_arch_state (target_gdbarch ()); |
| 876 | |
| 877 | if (rs->explicit_packet_size) |
| 878 | return rs->explicit_packet_size; |
| 879 | |
| 880 | return rsa->remote_packet_size; |
| 881 | } |
| 882 | |
| 883 | static struct packet_reg * |
| 884 | packet_reg_from_regnum (struct gdbarch *gdbarch, struct remote_arch_state *rsa, |
| 885 | long regnum) |
| 886 | { |
| 887 | if (regnum < 0 && regnum >= gdbarch_num_regs (gdbarch)) |
| 888 | return NULL; |
| 889 | else |
| 890 | { |
| 891 | struct packet_reg *r = &rsa->regs[regnum]; |
| 892 | |
| 893 | gdb_assert (r->regnum == regnum); |
| 894 | return r; |
| 895 | } |
| 896 | } |
| 897 | |
| 898 | static struct packet_reg * |
| 899 | packet_reg_from_pnum (struct gdbarch *gdbarch, struct remote_arch_state *rsa, |
| 900 | LONGEST pnum) |
| 901 | { |
| 902 | int i; |
| 903 | |
| 904 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
| 905 | { |
| 906 | struct packet_reg *r = &rsa->regs[i]; |
| 907 | |
| 908 | if (r->pnum == pnum) |
| 909 | return r; |
| 910 | } |
| 911 | return NULL; |
| 912 | } |
| 913 | |
| 914 | static struct target_ops remote_ops; |
| 915 | |
| 916 | static struct target_ops extended_remote_ops; |
| 917 | |
| 918 | /* FIXME: cagney/1999-09-23: Even though getpkt was called with |
| 919 | ``forever'' still use the normal timeout mechanism. This is |
| 920 | currently used by the ASYNC code to guarentee that target reads |
| 921 | during the initial connect always time-out. Once getpkt has been |
| 922 | modified to return a timeout indication and, in turn |
| 923 | remote_wait()/wait_for_inferior() have gained a timeout parameter |
| 924 | this can go away. */ |
| 925 | static int wait_forever_enabled_p = 1; |
| 926 | |
| 927 | /* Allow the user to specify what sequence to send to the remote |
| 928 | when he requests a program interruption: Although ^C is usually |
| 929 | what remote systems expect (this is the default, here), it is |
| 930 | sometimes preferable to send a break. On other systems such |
| 931 | as the Linux kernel, a break followed by g, which is Magic SysRq g |
| 932 | is required in order to interrupt the execution. */ |
| 933 | const char interrupt_sequence_control_c[] = "Ctrl-C"; |
| 934 | const char interrupt_sequence_break[] = "BREAK"; |
| 935 | const char interrupt_sequence_break_g[] = "BREAK-g"; |
| 936 | static const char *const interrupt_sequence_modes[] = |
| 937 | { |
| 938 | interrupt_sequence_control_c, |
| 939 | interrupt_sequence_break, |
| 940 | interrupt_sequence_break_g, |
| 941 | NULL |
| 942 | }; |
| 943 | static const char *interrupt_sequence_mode = interrupt_sequence_control_c; |
| 944 | |
| 945 | static void |
| 946 | show_interrupt_sequence (struct ui_file *file, int from_tty, |
| 947 | struct cmd_list_element *c, |
| 948 | const char *value) |
| 949 | { |
| 950 | if (interrupt_sequence_mode == interrupt_sequence_control_c) |
| 951 | fprintf_filtered (file, |
| 952 | _("Send the ASCII ETX character (Ctrl-c) " |
| 953 | "to the remote target to interrupt the " |
| 954 | "execution of the program.\n")); |
| 955 | else if (interrupt_sequence_mode == interrupt_sequence_break) |
| 956 | fprintf_filtered (file, |
| 957 | _("send a break signal to the remote target " |
| 958 | "to interrupt the execution of the program.\n")); |
| 959 | else if (interrupt_sequence_mode == interrupt_sequence_break_g) |
| 960 | fprintf_filtered (file, |
| 961 | _("Send a break signal and 'g' a.k.a. Magic SysRq g to " |
| 962 | "the remote target to interrupt the execution " |
| 963 | "of Linux kernel.\n")); |
| 964 | else |
| 965 | internal_error (__FILE__, __LINE__, |
| 966 | _("Invalid value for interrupt_sequence_mode: %s."), |
| 967 | interrupt_sequence_mode); |
| 968 | } |
| 969 | |
| 970 | /* This boolean variable specifies whether interrupt_sequence is sent |
| 971 | to the remote target when gdb connects to it. |
| 972 | This is mostly needed when you debug the Linux kernel: The Linux kernel |
| 973 | expects BREAK g which is Magic SysRq g for connecting gdb. */ |
| 974 | static int interrupt_on_connect = 0; |
| 975 | |
| 976 | /* This variable is used to implement the "set/show remotebreak" commands. |
| 977 | Since these commands are now deprecated in favor of "set/show remote |
| 978 | interrupt-sequence", it no longer has any effect on the code. */ |
| 979 | static int remote_break; |
| 980 | |
| 981 | static void |
| 982 | set_remotebreak (char *args, int from_tty, struct cmd_list_element *c) |
| 983 | { |
| 984 | if (remote_break) |
| 985 | interrupt_sequence_mode = interrupt_sequence_break; |
| 986 | else |
| 987 | interrupt_sequence_mode = interrupt_sequence_control_c; |
| 988 | } |
| 989 | |
| 990 | static void |
| 991 | show_remotebreak (struct ui_file *file, int from_tty, |
| 992 | struct cmd_list_element *c, |
| 993 | const char *value) |
| 994 | { |
| 995 | } |
| 996 | |
| 997 | /* This variable sets the number of bits in an address that are to be |
| 998 | sent in a memory ("M" or "m") packet. Normally, after stripping |
| 999 | leading zeros, the entire address would be sent. This variable |
| 1000 | restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The |
| 1001 | initial implementation of remote.c restricted the address sent in |
| 1002 | memory packets to ``host::sizeof long'' bytes - (typically 32 |
| 1003 | bits). Consequently, for 64 bit targets, the upper 32 bits of an |
| 1004 | address was never sent. Since fixing this bug may cause a break in |
| 1005 | some remote targets this variable is principly provided to |
| 1006 | facilitate backward compatibility. */ |
| 1007 | |
| 1008 | static unsigned int remote_address_size; |
| 1009 | |
| 1010 | \f |
| 1011 | /* User configurable variables for the number of characters in a |
| 1012 | memory read/write packet. MIN (rsa->remote_packet_size, |
| 1013 | rsa->sizeof_g_packet) is the default. Some targets need smaller |
| 1014 | values (fifo overruns, et.al.) and some users need larger values |
| 1015 | (speed up transfers). The variables ``preferred_*'' (the user |
| 1016 | request), ``current_*'' (what was actually set) and ``forced_*'' |
| 1017 | (Positive - a soft limit, negative - a hard limit). */ |
| 1018 | |
| 1019 | struct memory_packet_config |
| 1020 | { |
| 1021 | const char *name; |
| 1022 | long size; |
| 1023 | int fixed_p; |
| 1024 | }; |
| 1025 | |
| 1026 | /* The default max memory-write-packet-size. The 16k is historical. |
| 1027 | (It came from older GDB's using alloca for buffers and the |
| 1028 | knowledge (folklore?) that some hosts don't cope very well with |
| 1029 | large alloca calls.) */ |
| 1030 | #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384 |
| 1031 | |
| 1032 | /* The minimum remote packet size for memory transfers. Ensures we |
| 1033 | can write at least one byte. */ |
| 1034 | #define MIN_MEMORY_PACKET_SIZE 20 |
| 1035 | |
| 1036 | /* Compute the current size of a read/write packet. Since this makes |
| 1037 | use of ``actual_register_packet_size'' the computation is dynamic. */ |
| 1038 | |
| 1039 | static long |
| 1040 | get_memory_packet_size (struct memory_packet_config *config) |
| 1041 | { |
| 1042 | struct remote_state *rs = get_remote_state (); |
| 1043 | remote_arch_state *rsa = get_remote_arch_state (target_gdbarch ()); |
| 1044 | |
| 1045 | long what_they_get; |
| 1046 | if (config->fixed_p) |
| 1047 | { |
| 1048 | if (config->size <= 0) |
| 1049 | what_they_get = DEFAULT_MAX_MEMORY_PACKET_SIZE; |
| 1050 | else |
| 1051 | what_they_get = config->size; |
| 1052 | } |
| 1053 | else |
| 1054 | { |
| 1055 | what_they_get = get_remote_packet_size (); |
| 1056 | /* Limit the packet to the size specified by the user. */ |
| 1057 | if (config->size > 0 |
| 1058 | && what_they_get > config->size) |
| 1059 | what_they_get = config->size; |
| 1060 | |
| 1061 | /* Limit it to the size of the targets ``g'' response unless we have |
| 1062 | permission from the stub to use a larger packet size. */ |
| 1063 | if (rs->explicit_packet_size == 0 |
| 1064 | && rsa->actual_register_packet_size > 0 |
| 1065 | && what_they_get > rsa->actual_register_packet_size) |
| 1066 | what_they_get = rsa->actual_register_packet_size; |
| 1067 | } |
| 1068 | if (what_they_get < MIN_MEMORY_PACKET_SIZE) |
| 1069 | what_they_get = MIN_MEMORY_PACKET_SIZE; |
| 1070 | |
| 1071 | /* Make sure there is room in the global buffer for this packet |
| 1072 | (including its trailing NUL byte). */ |
| 1073 | if (rs->buf_size < what_they_get + 1) |
| 1074 | { |
| 1075 | rs->buf_size = 2 * what_they_get; |
| 1076 | rs->buf = (char *) xrealloc (rs->buf, 2 * what_they_get); |
| 1077 | } |
| 1078 | |
| 1079 | return what_they_get; |
| 1080 | } |
| 1081 | |
| 1082 | /* Update the size of a read/write packet. If they user wants |
| 1083 | something really big then do a sanity check. */ |
| 1084 | |
| 1085 | static void |
| 1086 | set_memory_packet_size (const char *args, struct memory_packet_config *config) |
| 1087 | { |
| 1088 | int fixed_p = config->fixed_p; |
| 1089 | long size = config->size; |
| 1090 | |
| 1091 | if (args == NULL) |
| 1092 | error (_("Argument required (integer, `fixed' or `limited').")); |
| 1093 | else if (strcmp (args, "hard") == 0 |
| 1094 | || strcmp (args, "fixed") == 0) |
| 1095 | fixed_p = 1; |
| 1096 | else if (strcmp (args, "soft") == 0 |
| 1097 | || strcmp (args, "limit") == 0) |
| 1098 | fixed_p = 0; |
| 1099 | else |
| 1100 | { |
| 1101 | char *end; |
| 1102 | |
| 1103 | size = strtoul (args, &end, 0); |
| 1104 | if (args == end) |
| 1105 | error (_("Invalid %s (bad syntax)."), config->name); |
| 1106 | |
| 1107 | /* Instead of explicitly capping the size of a packet to or |
| 1108 | disallowing it, the user is allowed to set the size to |
| 1109 | something arbitrarily large. */ |
| 1110 | } |
| 1111 | |
| 1112 | /* So that the query shows the correct value. */ |
| 1113 | if (size <= 0) |
| 1114 | size = DEFAULT_MAX_MEMORY_PACKET_SIZE; |
| 1115 | |
| 1116 | /* Extra checks? */ |
| 1117 | if (fixed_p && !config->fixed_p) |
| 1118 | { |
| 1119 | if (! query (_("The target may not be able to correctly handle a %s\n" |
| 1120 | "of %ld bytes. Change the packet size? "), |
| 1121 | config->name, size)) |
| 1122 | error (_("Packet size not changed.")); |
| 1123 | } |
| 1124 | /* Update the config. */ |
| 1125 | config->fixed_p = fixed_p; |
| 1126 | config->size = size; |
| 1127 | } |
| 1128 | |
| 1129 | static void |
| 1130 | show_memory_packet_size (struct memory_packet_config *config) |
| 1131 | { |
| 1132 | printf_filtered (_("The %s is %ld. "), config->name, config->size); |
| 1133 | if (config->fixed_p) |
| 1134 | printf_filtered (_("Packets are fixed at %ld bytes.\n"), |
| 1135 | get_memory_packet_size (config)); |
| 1136 | else |
| 1137 | printf_filtered (_("Packets are limited to %ld bytes.\n"), |
| 1138 | get_memory_packet_size (config)); |
| 1139 | } |
| 1140 | |
| 1141 | static struct memory_packet_config memory_write_packet_config = |
| 1142 | { |
| 1143 | "memory-write-packet-size", |
| 1144 | }; |
| 1145 | |
| 1146 | static void |
| 1147 | set_memory_write_packet_size (const char *args, int from_tty) |
| 1148 | { |
| 1149 | set_memory_packet_size (args, &memory_write_packet_config); |
| 1150 | } |
| 1151 | |
| 1152 | static void |
| 1153 | show_memory_write_packet_size (const char *args, int from_tty) |
| 1154 | { |
| 1155 | show_memory_packet_size (&memory_write_packet_config); |
| 1156 | } |
| 1157 | |
| 1158 | static long |
| 1159 | get_memory_write_packet_size (void) |
| 1160 | { |
| 1161 | return get_memory_packet_size (&memory_write_packet_config); |
| 1162 | } |
| 1163 | |
| 1164 | static struct memory_packet_config memory_read_packet_config = |
| 1165 | { |
| 1166 | "memory-read-packet-size", |
| 1167 | }; |
| 1168 | |
| 1169 | static void |
| 1170 | set_memory_read_packet_size (const char *args, int from_tty) |
| 1171 | { |
| 1172 | set_memory_packet_size (args, &memory_read_packet_config); |
| 1173 | } |
| 1174 | |
| 1175 | static void |
| 1176 | show_memory_read_packet_size (const char *args, int from_tty) |
| 1177 | { |
| 1178 | show_memory_packet_size (&memory_read_packet_config); |
| 1179 | } |
| 1180 | |
| 1181 | static long |
| 1182 | get_memory_read_packet_size (void) |
| 1183 | { |
| 1184 | long size = get_memory_packet_size (&memory_read_packet_config); |
| 1185 | |
| 1186 | /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an |
| 1187 | extra buffer size argument before the memory read size can be |
| 1188 | increased beyond this. */ |
| 1189 | if (size > get_remote_packet_size ()) |
| 1190 | size = get_remote_packet_size (); |
| 1191 | return size; |
| 1192 | } |
| 1193 | |
| 1194 | \f |
| 1195 | /* Generic configuration support for packets the stub optionally |
| 1196 | supports. Allows the user to specify the use of the packet as well |
| 1197 | as allowing GDB to auto-detect support in the remote stub. */ |
| 1198 | |
| 1199 | enum packet_support |
| 1200 | { |
| 1201 | PACKET_SUPPORT_UNKNOWN = 0, |
| 1202 | PACKET_ENABLE, |
| 1203 | PACKET_DISABLE |
| 1204 | }; |
| 1205 | |
| 1206 | struct packet_config |
| 1207 | { |
| 1208 | const char *name; |
| 1209 | const char *title; |
| 1210 | |
| 1211 | /* If auto, GDB auto-detects support for this packet or feature, |
| 1212 | either through qSupported, or by trying the packet and looking |
| 1213 | at the response. If true, GDB assumes the target supports this |
| 1214 | packet. If false, the packet is disabled. Configs that don't |
| 1215 | have an associated command always have this set to auto. */ |
| 1216 | enum auto_boolean detect; |
| 1217 | |
| 1218 | /* Does the target support this packet? */ |
| 1219 | enum packet_support support; |
| 1220 | }; |
| 1221 | |
| 1222 | /* Analyze a packet's return value and update the packet config |
| 1223 | accordingly. */ |
| 1224 | |
| 1225 | enum packet_result |
| 1226 | { |
| 1227 | PACKET_ERROR, |
| 1228 | PACKET_OK, |
| 1229 | PACKET_UNKNOWN |
| 1230 | }; |
| 1231 | |
| 1232 | static enum packet_support packet_config_support (struct packet_config *config); |
| 1233 | static enum packet_support packet_support (int packet); |
| 1234 | |
| 1235 | static void |
| 1236 | show_packet_config_cmd (struct packet_config *config) |
| 1237 | { |
| 1238 | const char *support = "internal-error"; |
| 1239 | |
| 1240 | switch (packet_config_support (config)) |
| 1241 | { |
| 1242 | case PACKET_ENABLE: |
| 1243 | support = "enabled"; |
| 1244 | break; |
| 1245 | case PACKET_DISABLE: |
| 1246 | support = "disabled"; |
| 1247 | break; |
| 1248 | case PACKET_SUPPORT_UNKNOWN: |
| 1249 | support = "unknown"; |
| 1250 | break; |
| 1251 | } |
| 1252 | switch (config->detect) |
| 1253 | { |
| 1254 | case AUTO_BOOLEAN_AUTO: |
| 1255 | printf_filtered (_("Support for the `%s' packet " |
| 1256 | "is auto-detected, currently %s.\n"), |
| 1257 | config->name, support); |
| 1258 | break; |
| 1259 | case AUTO_BOOLEAN_TRUE: |
| 1260 | case AUTO_BOOLEAN_FALSE: |
| 1261 | printf_filtered (_("Support for the `%s' packet is currently %s.\n"), |
| 1262 | config->name, support); |
| 1263 | break; |
| 1264 | } |
| 1265 | } |
| 1266 | |
| 1267 | static void |
| 1268 | add_packet_config_cmd (struct packet_config *config, const char *name, |
| 1269 | const char *title, int legacy) |
| 1270 | { |
| 1271 | char *set_doc; |
| 1272 | char *show_doc; |
| 1273 | char *cmd_name; |
| 1274 | |
| 1275 | config->name = name; |
| 1276 | config->title = title; |
| 1277 | set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet", |
| 1278 | name, title); |
| 1279 | show_doc = xstrprintf ("Show current use of remote " |
| 1280 | "protocol `%s' (%s) packet", |
| 1281 | name, title); |
| 1282 | /* set/show TITLE-packet {auto,on,off} */ |
| 1283 | cmd_name = xstrprintf ("%s-packet", title); |
| 1284 | add_setshow_auto_boolean_cmd (cmd_name, class_obscure, |
| 1285 | &config->detect, set_doc, |
| 1286 | show_doc, NULL, /* help_doc */ |
| 1287 | NULL, |
| 1288 | show_remote_protocol_packet_cmd, |
| 1289 | &remote_set_cmdlist, &remote_show_cmdlist); |
| 1290 | /* The command code copies the documentation strings. */ |
| 1291 | xfree (set_doc); |
| 1292 | xfree (show_doc); |
| 1293 | /* set/show remote NAME-packet {auto,on,off} -- legacy. */ |
| 1294 | if (legacy) |
| 1295 | { |
| 1296 | char *legacy_name; |
| 1297 | |
| 1298 | legacy_name = xstrprintf ("%s-packet", name); |
| 1299 | add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, |
| 1300 | &remote_set_cmdlist); |
| 1301 | add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, |
| 1302 | &remote_show_cmdlist); |
| 1303 | } |
| 1304 | } |
| 1305 | |
| 1306 | static enum packet_result |
| 1307 | packet_check_result (const char *buf) |
| 1308 | { |
| 1309 | if (buf[0] != '\0') |
| 1310 | { |
| 1311 | /* The stub recognized the packet request. Check that the |
| 1312 | operation succeeded. */ |
| 1313 | if (buf[0] == 'E' |
| 1314 | && isxdigit (buf[1]) && isxdigit (buf[2]) |
| 1315 | && buf[3] == '\0') |
| 1316 | /* "Enn" - definitly an error. */ |
| 1317 | return PACKET_ERROR; |
| 1318 | |
| 1319 | /* Always treat "E." as an error. This will be used for |
| 1320 | more verbose error messages, such as E.memtypes. */ |
| 1321 | if (buf[0] == 'E' && buf[1] == '.') |
| 1322 | return PACKET_ERROR; |
| 1323 | |
| 1324 | /* The packet may or may not be OK. Just assume it is. */ |
| 1325 | return PACKET_OK; |
| 1326 | } |
| 1327 | else |
| 1328 | /* The stub does not support the packet. */ |
| 1329 | return PACKET_UNKNOWN; |
| 1330 | } |
| 1331 | |
| 1332 | static enum packet_result |
| 1333 | packet_ok (const char *buf, struct packet_config *config) |
| 1334 | { |
| 1335 | enum packet_result result; |
| 1336 | |
| 1337 | if (config->detect != AUTO_BOOLEAN_TRUE |
| 1338 | && config->support == PACKET_DISABLE) |
| 1339 | internal_error (__FILE__, __LINE__, |
| 1340 | _("packet_ok: attempt to use a disabled packet")); |
| 1341 | |
| 1342 | result = packet_check_result (buf); |
| 1343 | switch (result) |
| 1344 | { |
| 1345 | case PACKET_OK: |
| 1346 | case PACKET_ERROR: |
| 1347 | /* The stub recognized the packet request. */ |
| 1348 | if (config->support == PACKET_SUPPORT_UNKNOWN) |
| 1349 | { |
| 1350 | if (remote_debug) |
| 1351 | fprintf_unfiltered (gdb_stdlog, |
| 1352 | "Packet %s (%s) is supported\n", |
| 1353 | config->name, config->title); |
| 1354 | config->support = PACKET_ENABLE; |
| 1355 | } |
| 1356 | break; |
| 1357 | case PACKET_UNKNOWN: |
| 1358 | /* The stub does not support the packet. */ |
| 1359 | if (config->detect == AUTO_BOOLEAN_AUTO |
| 1360 | && config->support == PACKET_ENABLE) |
| 1361 | { |
| 1362 | /* If the stub previously indicated that the packet was |
| 1363 | supported then there is a protocol error. */ |
| 1364 | error (_("Protocol error: %s (%s) conflicting enabled responses."), |
| 1365 | config->name, config->title); |
| 1366 | } |
| 1367 | else if (config->detect == AUTO_BOOLEAN_TRUE) |
| 1368 | { |
| 1369 | /* The user set it wrong. */ |
| 1370 | error (_("Enabled packet %s (%s) not recognized by stub"), |
| 1371 | config->name, config->title); |
| 1372 | } |
| 1373 | |
| 1374 | if (remote_debug) |
| 1375 | fprintf_unfiltered (gdb_stdlog, |
| 1376 | "Packet %s (%s) is NOT supported\n", |
| 1377 | config->name, config->title); |
| 1378 | config->support = PACKET_DISABLE; |
| 1379 | break; |
| 1380 | } |
| 1381 | |
| 1382 | return result; |
| 1383 | } |
| 1384 | |
| 1385 | enum { |
| 1386 | PACKET_vCont = 0, |
| 1387 | PACKET_X, |
| 1388 | PACKET_qSymbol, |
| 1389 | PACKET_P, |
| 1390 | PACKET_p, |
| 1391 | PACKET_Z0, |
| 1392 | PACKET_Z1, |
| 1393 | PACKET_Z2, |
| 1394 | PACKET_Z3, |
| 1395 | PACKET_Z4, |
| 1396 | PACKET_vFile_setfs, |
| 1397 | PACKET_vFile_open, |
| 1398 | PACKET_vFile_pread, |
| 1399 | PACKET_vFile_pwrite, |
| 1400 | PACKET_vFile_close, |
| 1401 | PACKET_vFile_unlink, |
| 1402 | PACKET_vFile_readlink, |
| 1403 | PACKET_vFile_fstat, |
| 1404 | PACKET_qXfer_auxv, |
| 1405 | PACKET_qXfer_features, |
| 1406 | PACKET_qXfer_exec_file, |
| 1407 | PACKET_qXfer_libraries, |
| 1408 | PACKET_qXfer_libraries_svr4, |
| 1409 | PACKET_qXfer_memory_map, |
| 1410 | PACKET_qXfer_spu_read, |
| 1411 | PACKET_qXfer_spu_write, |
| 1412 | PACKET_qXfer_osdata, |
| 1413 | PACKET_qXfer_threads, |
| 1414 | PACKET_qXfer_statictrace_read, |
| 1415 | PACKET_qXfer_traceframe_info, |
| 1416 | PACKET_qXfer_uib, |
| 1417 | PACKET_qGetTIBAddr, |
| 1418 | PACKET_qGetTLSAddr, |
| 1419 | PACKET_qSupported, |
| 1420 | PACKET_qTStatus, |
| 1421 | PACKET_QPassSignals, |
| 1422 | PACKET_QCatchSyscalls, |
| 1423 | PACKET_QProgramSignals, |
| 1424 | PACKET_QSetWorkingDir, |
| 1425 | PACKET_QStartupWithShell, |
| 1426 | PACKET_QEnvironmentHexEncoded, |
| 1427 | PACKET_QEnvironmentReset, |
| 1428 | PACKET_QEnvironmentUnset, |
| 1429 | PACKET_qCRC, |
| 1430 | PACKET_qSearch_memory, |
| 1431 | PACKET_vAttach, |
| 1432 | PACKET_vRun, |
| 1433 | PACKET_QStartNoAckMode, |
| 1434 | PACKET_vKill, |
| 1435 | PACKET_qXfer_siginfo_read, |
| 1436 | PACKET_qXfer_siginfo_write, |
| 1437 | PACKET_qAttached, |
| 1438 | |
| 1439 | /* Support for conditional tracepoints. */ |
| 1440 | PACKET_ConditionalTracepoints, |
| 1441 | |
| 1442 | /* Support for target-side breakpoint conditions. */ |
| 1443 | PACKET_ConditionalBreakpoints, |
| 1444 | |
| 1445 | /* Support for target-side breakpoint commands. */ |
| 1446 | PACKET_BreakpointCommands, |
| 1447 | |
| 1448 | /* Support for fast tracepoints. */ |
| 1449 | PACKET_FastTracepoints, |
| 1450 | |
| 1451 | /* Support for static tracepoints. */ |
| 1452 | PACKET_StaticTracepoints, |
| 1453 | |
| 1454 | /* Support for installing tracepoints while a trace experiment is |
| 1455 | running. */ |
| 1456 | PACKET_InstallInTrace, |
| 1457 | |
| 1458 | PACKET_bc, |
| 1459 | PACKET_bs, |
| 1460 | PACKET_TracepointSource, |
| 1461 | PACKET_QAllow, |
| 1462 | PACKET_qXfer_fdpic, |
| 1463 | PACKET_QDisableRandomization, |
| 1464 | PACKET_QAgent, |
| 1465 | PACKET_QTBuffer_size, |
| 1466 | PACKET_Qbtrace_off, |
| 1467 | PACKET_Qbtrace_bts, |
| 1468 | PACKET_Qbtrace_pt, |
| 1469 | PACKET_qXfer_btrace, |
| 1470 | |
| 1471 | /* Support for the QNonStop packet. */ |
| 1472 | PACKET_QNonStop, |
| 1473 | |
| 1474 | /* Support for the QThreadEvents packet. */ |
| 1475 | PACKET_QThreadEvents, |
| 1476 | |
| 1477 | /* Support for multi-process extensions. */ |
| 1478 | PACKET_multiprocess_feature, |
| 1479 | |
| 1480 | /* Support for enabling and disabling tracepoints while a trace |
| 1481 | experiment is running. */ |
| 1482 | PACKET_EnableDisableTracepoints_feature, |
| 1483 | |
| 1484 | /* Support for collecting strings using the tracenz bytecode. */ |
| 1485 | PACKET_tracenz_feature, |
| 1486 | |
| 1487 | /* Support for continuing to run a trace experiment while GDB is |
| 1488 | disconnected. */ |
| 1489 | PACKET_DisconnectedTracing_feature, |
| 1490 | |
| 1491 | /* Support for qXfer:libraries-svr4:read with a non-empty annex. */ |
| 1492 | PACKET_augmented_libraries_svr4_read_feature, |
| 1493 | |
| 1494 | /* Support for the qXfer:btrace-conf:read packet. */ |
| 1495 | PACKET_qXfer_btrace_conf, |
| 1496 | |
| 1497 | /* Support for the Qbtrace-conf:bts:size packet. */ |
| 1498 | PACKET_Qbtrace_conf_bts_size, |
| 1499 | |
| 1500 | /* Support for swbreak+ feature. */ |
| 1501 | PACKET_swbreak_feature, |
| 1502 | |
| 1503 | /* Support for hwbreak+ feature. */ |
| 1504 | PACKET_hwbreak_feature, |
| 1505 | |
| 1506 | /* Support for fork events. */ |
| 1507 | PACKET_fork_event_feature, |
| 1508 | |
| 1509 | /* Support for vfork events. */ |
| 1510 | PACKET_vfork_event_feature, |
| 1511 | |
| 1512 | /* Support for the Qbtrace-conf:pt:size packet. */ |
| 1513 | PACKET_Qbtrace_conf_pt_size, |
| 1514 | |
| 1515 | /* Support for exec events. */ |
| 1516 | PACKET_exec_event_feature, |
| 1517 | |
| 1518 | /* Support for query supported vCont actions. */ |
| 1519 | PACKET_vContSupported, |
| 1520 | |
| 1521 | /* Support remote CTRL-C. */ |
| 1522 | PACKET_vCtrlC, |
| 1523 | |
| 1524 | /* Support TARGET_WAITKIND_NO_RESUMED. */ |
| 1525 | PACKET_no_resumed, |
| 1526 | |
| 1527 | PACKET_MAX |
| 1528 | }; |
| 1529 | |
| 1530 | static struct packet_config remote_protocol_packets[PACKET_MAX]; |
| 1531 | |
| 1532 | /* Returns the packet's corresponding "set remote foo-packet" command |
| 1533 | state. See struct packet_config for more details. */ |
| 1534 | |
| 1535 | static enum auto_boolean |
| 1536 | packet_set_cmd_state (int packet) |
| 1537 | { |
| 1538 | return remote_protocol_packets[packet].detect; |
| 1539 | } |
| 1540 | |
| 1541 | /* Returns whether a given packet or feature is supported. This takes |
| 1542 | into account the state of the corresponding "set remote foo-packet" |
| 1543 | command, which may be used to bypass auto-detection. */ |
| 1544 | |
| 1545 | static enum packet_support |
| 1546 | packet_config_support (struct packet_config *config) |
| 1547 | { |
| 1548 | switch (config->detect) |
| 1549 | { |
| 1550 | case AUTO_BOOLEAN_TRUE: |
| 1551 | return PACKET_ENABLE; |
| 1552 | case AUTO_BOOLEAN_FALSE: |
| 1553 | return PACKET_DISABLE; |
| 1554 | case AUTO_BOOLEAN_AUTO: |
| 1555 | return config->support; |
| 1556 | default: |
| 1557 | gdb_assert_not_reached (_("bad switch")); |
| 1558 | } |
| 1559 | } |
| 1560 | |
| 1561 | /* Same as packet_config_support, but takes the packet's enum value as |
| 1562 | argument. */ |
| 1563 | |
| 1564 | static enum packet_support |
| 1565 | packet_support (int packet) |
| 1566 | { |
| 1567 | struct packet_config *config = &remote_protocol_packets[packet]; |
| 1568 | |
| 1569 | return packet_config_support (config); |
| 1570 | } |
| 1571 | |
| 1572 | static void |
| 1573 | show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty, |
| 1574 | struct cmd_list_element *c, |
| 1575 | const char *value) |
| 1576 | { |
| 1577 | struct packet_config *packet; |
| 1578 | |
| 1579 | for (packet = remote_protocol_packets; |
| 1580 | packet < &remote_protocol_packets[PACKET_MAX]; |
| 1581 | packet++) |
| 1582 | { |
| 1583 | if (&packet->detect == c->var) |
| 1584 | { |
| 1585 | show_packet_config_cmd (packet); |
| 1586 | return; |
| 1587 | } |
| 1588 | } |
| 1589 | internal_error (__FILE__, __LINE__, _("Could not find config for %s"), |
| 1590 | c->name); |
| 1591 | } |
| 1592 | |
| 1593 | /* Should we try one of the 'Z' requests? */ |
| 1594 | |
| 1595 | enum Z_packet_type |
| 1596 | { |
| 1597 | Z_PACKET_SOFTWARE_BP, |
| 1598 | Z_PACKET_HARDWARE_BP, |
| 1599 | Z_PACKET_WRITE_WP, |
| 1600 | Z_PACKET_READ_WP, |
| 1601 | Z_PACKET_ACCESS_WP, |
| 1602 | NR_Z_PACKET_TYPES |
| 1603 | }; |
| 1604 | |
| 1605 | /* For compatibility with older distributions. Provide a ``set remote |
| 1606 | Z-packet ...'' command that updates all the Z packet types. */ |
| 1607 | |
| 1608 | static enum auto_boolean remote_Z_packet_detect; |
| 1609 | |
| 1610 | static void |
| 1611 | set_remote_protocol_Z_packet_cmd (char *args, int from_tty, |
| 1612 | struct cmd_list_element *c) |
| 1613 | { |
| 1614 | int i; |
| 1615 | |
| 1616 | for (i = 0; i < NR_Z_PACKET_TYPES; i++) |
| 1617 | remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect; |
| 1618 | } |
| 1619 | |
| 1620 | static void |
| 1621 | show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty, |
| 1622 | struct cmd_list_element *c, |
| 1623 | const char *value) |
| 1624 | { |
| 1625 | int i; |
| 1626 | |
| 1627 | for (i = 0; i < NR_Z_PACKET_TYPES; i++) |
| 1628 | { |
| 1629 | show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]); |
| 1630 | } |
| 1631 | } |
| 1632 | |
| 1633 | /* Returns true if the multi-process extensions are in effect. */ |
| 1634 | |
| 1635 | static int |
| 1636 | remote_multi_process_p (struct remote_state *rs) |
| 1637 | { |
| 1638 | return packet_support (PACKET_multiprocess_feature) == PACKET_ENABLE; |
| 1639 | } |
| 1640 | |
| 1641 | /* Returns true if fork events are supported. */ |
| 1642 | |
| 1643 | static int |
| 1644 | remote_fork_event_p (struct remote_state *rs) |
| 1645 | { |
| 1646 | return packet_support (PACKET_fork_event_feature) == PACKET_ENABLE; |
| 1647 | } |
| 1648 | |
| 1649 | /* Returns true if vfork events are supported. */ |
| 1650 | |
| 1651 | static int |
| 1652 | remote_vfork_event_p (struct remote_state *rs) |
| 1653 | { |
| 1654 | return packet_support (PACKET_vfork_event_feature) == PACKET_ENABLE; |
| 1655 | } |
| 1656 | |
| 1657 | /* Returns true if exec events are supported. */ |
| 1658 | |
| 1659 | static int |
| 1660 | remote_exec_event_p (struct remote_state *rs) |
| 1661 | { |
| 1662 | return packet_support (PACKET_exec_event_feature) == PACKET_ENABLE; |
| 1663 | } |
| 1664 | |
| 1665 | /* Insert fork catchpoint target routine. If fork events are enabled |
| 1666 | then return success, nothing more to do. */ |
| 1667 | |
| 1668 | static int |
| 1669 | remote_insert_fork_catchpoint (struct target_ops *ops, int pid) |
| 1670 | { |
| 1671 | struct remote_state *rs = get_remote_state (); |
| 1672 | |
| 1673 | return !remote_fork_event_p (rs); |
| 1674 | } |
| 1675 | |
| 1676 | /* Remove fork catchpoint target routine. Nothing to do, just |
| 1677 | return success. */ |
| 1678 | |
| 1679 | static int |
| 1680 | remote_remove_fork_catchpoint (struct target_ops *ops, int pid) |
| 1681 | { |
| 1682 | return 0; |
| 1683 | } |
| 1684 | |
| 1685 | /* Insert vfork catchpoint target routine. If vfork events are enabled |
| 1686 | then return success, nothing more to do. */ |
| 1687 | |
| 1688 | static int |
| 1689 | remote_insert_vfork_catchpoint (struct target_ops *ops, int pid) |
| 1690 | { |
| 1691 | struct remote_state *rs = get_remote_state (); |
| 1692 | |
| 1693 | return !remote_vfork_event_p (rs); |
| 1694 | } |
| 1695 | |
| 1696 | /* Remove vfork catchpoint target routine. Nothing to do, just |
| 1697 | return success. */ |
| 1698 | |
| 1699 | static int |
| 1700 | remote_remove_vfork_catchpoint (struct target_ops *ops, int pid) |
| 1701 | { |
| 1702 | return 0; |
| 1703 | } |
| 1704 | |
| 1705 | /* Insert exec catchpoint target routine. If exec events are |
| 1706 | enabled, just return success. */ |
| 1707 | |
| 1708 | static int |
| 1709 | remote_insert_exec_catchpoint (struct target_ops *ops, int pid) |
| 1710 | { |
| 1711 | struct remote_state *rs = get_remote_state (); |
| 1712 | |
| 1713 | return !remote_exec_event_p (rs); |
| 1714 | } |
| 1715 | |
| 1716 | /* Remove exec catchpoint target routine. Nothing to do, just |
| 1717 | return success. */ |
| 1718 | |
| 1719 | static int |
| 1720 | remote_remove_exec_catchpoint (struct target_ops *ops, int pid) |
| 1721 | { |
| 1722 | return 0; |
| 1723 | } |
| 1724 | |
| 1725 | \f |
| 1726 | /* Asynchronous signal handle registered as event loop source for |
| 1727 | when we have pending events ready to be passed to the core. */ |
| 1728 | |
| 1729 | static struct async_event_handler *remote_async_inferior_event_token; |
| 1730 | |
| 1731 | \f |
| 1732 | |
| 1733 | static ptid_t magic_null_ptid; |
| 1734 | static ptid_t not_sent_ptid; |
| 1735 | static ptid_t any_thread_ptid; |
| 1736 | |
| 1737 | /* Find out if the stub attached to PID (and hence GDB should offer to |
| 1738 | detach instead of killing it when bailing out). */ |
| 1739 | |
| 1740 | static int |
| 1741 | remote_query_attached (int pid) |
| 1742 | { |
| 1743 | struct remote_state *rs = get_remote_state (); |
| 1744 | size_t size = get_remote_packet_size (); |
| 1745 | |
| 1746 | if (packet_support (PACKET_qAttached) == PACKET_DISABLE) |
| 1747 | return 0; |
| 1748 | |
| 1749 | if (remote_multi_process_p (rs)) |
| 1750 | xsnprintf (rs->buf, size, "qAttached:%x", pid); |
| 1751 | else |
| 1752 | xsnprintf (rs->buf, size, "qAttached"); |
| 1753 | |
| 1754 | putpkt (rs->buf); |
| 1755 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 1756 | |
| 1757 | switch (packet_ok (rs->buf, |
| 1758 | &remote_protocol_packets[PACKET_qAttached])) |
| 1759 | { |
| 1760 | case PACKET_OK: |
| 1761 | if (strcmp (rs->buf, "1") == 0) |
| 1762 | return 1; |
| 1763 | break; |
| 1764 | case PACKET_ERROR: |
| 1765 | warning (_("Remote failure reply: %s"), rs->buf); |
| 1766 | break; |
| 1767 | case PACKET_UNKNOWN: |
| 1768 | break; |
| 1769 | } |
| 1770 | |
| 1771 | return 0; |
| 1772 | } |
| 1773 | |
| 1774 | /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID |
| 1775 | has been invented by GDB, instead of reported by the target. Since |
| 1776 | we can be connected to a remote system before before knowing about |
| 1777 | any inferior, mark the target with execution when we find the first |
| 1778 | inferior. If ATTACHED is 1, then we had just attached to this |
| 1779 | inferior. If it is 0, then we just created this inferior. If it |
| 1780 | is -1, then try querying the remote stub to find out if it had |
| 1781 | attached to the inferior or not. If TRY_OPEN_EXEC is true then |
| 1782 | attempt to open this inferior's executable as the main executable |
| 1783 | if no main executable is open already. */ |
| 1784 | |
| 1785 | static struct inferior * |
| 1786 | remote_add_inferior (int fake_pid_p, int pid, int attached, |
| 1787 | int try_open_exec) |
| 1788 | { |
| 1789 | struct inferior *inf; |
| 1790 | |
| 1791 | /* Check whether this process we're learning about is to be |
| 1792 | considered attached, or if is to be considered to have been |
| 1793 | spawned by the stub. */ |
| 1794 | if (attached == -1) |
| 1795 | attached = remote_query_attached (pid); |
| 1796 | |
| 1797 | if (gdbarch_has_global_solist (target_gdbarch ())) |
| 1798 | { |
| 1799 | /* If the target shares code across all inferiors, then every |
| 1800 | attach adds a new inferior. */ |
| 1801 | inf = add_inferior (pid); |
| 1802 | |
| 1803 | /* ... and every inferior is bound to the same program space. |
| 1804 | However, each inferior may still have its own address |
| 1805 | space. */ |
| 1806 | inf->aspace = maybe_new_address_space (); |
| 1807 | inf->pspace = current_program_space; |
| 1808 | } |
| 1809 | else |
| 1810 | { |
| 1811 | /* In the traditional debugging scenario, there's a 1-1 match |
| 1812 | between program/address spaces. We simply bind the inferior |
| 1813 | to the program space's address space. */ |
| 1814 | inf = current_inferior (); |
| 1815 | inferior_appeared (inf, pid); |
| 1816 | } |
| 1817 | |
| 1818 | inf->attach_flag = attached; |
| 1819 | inf->fake_pid_p = fake_pid_p; |
| 1820 | |
| 1821 | /* If no main executable is currently open then attempt to |
| 1822 | open the file that was executed to create this inferior. */ |
| 1823 | if (try_open_exec && get_exec_file (0) == NULL) |
| 1824 | exec_file_locate_attach (pid, 0, 1); |
| 1825 | |
| 1826 | return inf; |
| 1827 | } |
| 1828 | |
| 1829 | static struct private_thread_info * |
| 1830 | get_private_info_thread (struct thread_info *info); |
| 1831 | |
| 1832 | /* Add thread PTID to GDB's thread list. Tag it as executing/running |
| 1833 | according to RUNNING. */ |
| 1834 | |
| 1835 | static void |
| 1836 | remote_add_thread (ptid_t ptid, int running, int executing) |
| 1837 | { |
| 1838 | struct remote_state *rs = get_remote_state (); |
| 1839 | struct thread_info *thread; |
| 1840 | |
| 1841 | /* GDB historically didn't pull threads in the initial connection |
| 1842 | setup. If the remote target doesn't even have a concept of |
| 1843 | threads (e.g., a bare-metal target), even if internally we |
| 1844 | consider that a single-threaded target, mentioning a new thread |
| 1845 | might be confusing to the user. Be silent then, preserving the |
| 1846 | age old behavior. */ |
| 1847 | if (rs->starting_up) |
| 1848 | thread = add_thread_silent (ptid); |
| 1849 | else |
| 1850 | thread = add_thread (ptid); |
| 1851 | |
| 1852 | get_private_info_thread (thread)->vcont_resumed = executing; |
| 1853 | set_executing (ptid, executing); |
| 1854 | set_running (ptid, running); |
| 1855 | } |
| 1856 | |
| 1857 | /* Come here when we learn about a thread id from the remote target. |
| 1858 | It may be the first time we hear about such thread, so take the |
| 1859 | opportunity to add it to GDB's thread list. In case this is the |
| 1860 | first time we're noticing its corresponding inferior, add it to |
| 1861 | GDB's inferior list as well. EXECUTING indicates whether the |
| 1862 | thread is (internally) executing or stopped. */ |
| 1863 | |
| 1864 | static void |
| 1865 | remote_notice_new_inferior (ptid_t currthread, int executing) |
| 1866 | { |
| 1867 | /* In non-stop mode, we assume new found threads are (externally) |
| 1868 | running until proven otherwise with a stop reply. In all-stop, |
| 1869 | we can only get here if all threads are stopped. */ |
| 1870 | int running = target_is_non_stop_p () ? 1 : 0; |
| 1871 | |
| 1872 | /* If this is a new thread, add it to GDB's thread list. |
| 1873 | If we leave it up to WFI to do this, bad things will happen. */ |
| 1874 | |
| 1875 | if (in_thread_list (currthread) && is_exited (currthread)) |
| 1876 | { |
| 1877 | /* We're seeing an event on a thread id we knew had exited. |
| 1878 | This has to be a new thread reusing the old id. Add it. */ |
| 1879 | remote_add_thread (currthread, running, executing); |
| 1880 | return; |
| 1881 | } |
| 1882 | |
| 1883 | if (!in_thread_list (currthread)) |
| 1884 | { |
| 1885 | struct inferior *inf = NULL; |
| 1886 | int pid = ptid_get_pid (currthread); |
| 1887 | |
| 1888 | if (ptid_is_pid (inferior_ptid) |
| 1889 | && pid == ptid_get_pid (inferior_ptid)) |
| 1890 | { |
| 1891 | /* inferior_ptid has no thread member yet. This can happen |
| 1892 | with the vAttach -> remote_wait,"TAAthread:" path if the |
| 1893 | stub doesn't support qC. This is the first stop reported |
| 1894 | after an attach, so this is the main thread. Update the |
| 1895 | ptid in the thread list. */ |
| 1896 | if (in_thread_list (pid_to_ptid (pid))) |
| 1897 | thread_change_ptid (inferior_ptid, currthread); |
| 1898 | else |
| 1899 | { |
| 1900 | remote_add_thread (currthread, running, executing); |
| 1901 | inferior_ptid = currthread; |
| 1902 | } |
| 1903 | return; |
| 1904 | } |
| 1905 | |
| 1906 | if (ptid_equal (magic_null_ptid, inferior_ptid)) |
| 1907 | { |
| 1908 | /* inferior_ptid is not set yet. This can happen with the |
| 1909 | vRun -> remote_wait,"TAAthread:" path if the stub |
| 1910 | doesn't support qC. This is the first stop reported |
| 1911 | after an attach, so this is the main thread. Update the |
| 1912 | ptid in the thread list. */ |
| 1913 | thread_change_ptid (inferior_ptid, currthread); |
| 1914 | return; |
| 1915 | } |
| 1916 | |
| 1917 | /* When connecting to a target remote, or to a target |
| 1918 | extended-remote which already was debugging an inferior, we |
| 1919 | may not know about it yet. Add it before adding its child |
| 1920 | thread, so notifications are emitted in a sensible order. */ |
| 1921 | if (!in_inferior_list (ptid_get_pid (currthread))) |
| 1922 | { |
| 1923 | struct remote_state *rs = get_remote_state (); |
| 1924 | int fake_pid_p = !remote_multi_process_p (rs); |
| 1925 | |
| 1926 | inf = remote_add_inferior (fake_pid_p, |
| 1927 | ptid_get_pid (currthread), -1, 1); |
| 1928 | } |
| 1929 | |
| 1930 | /* This is really a new thread. Add it. */ |
| 1931 | remote_add_thread (currthread, running, executing); |
| 1932 | |
| 1933 | /* If we found a new inferior, let the common code do whatever |
| 1934 | it needs to with it (e.g., read shared libraries, insert |
| 1935 | breakpoints), unless we're just setting up an all-stop |
| 1936 | connection. */ |
| 1937 | if (inf != NULL) |
| 1938 | { |
| 1939 | struct remote_state *rs = get_remote_state (); |
| 1940 | |
| 1941 | if (!rs->starting_up) |
| 1942 | notice_new_inferior (currthread, executing, 0); |
| 1943 | } |
| 1944 | } |
| 1945 | } |
| 1946 | |
| 1947 | /* Return THREAD's private thread data, creating it if necessary. */ |
| 1948 | |
| 1949 | static struct private_thread_info * |
| 1950 | get_private_info_thread (struct thread_info *thread) |
| 1951 | { |
| 1952 | gdb_assert (thread != NULL); |
| 1953 | |
| 1954 | if (thread->priv == NULL) |
| 1955 | { |
| 1956 | struct private_thread_info *priv = XNEW (struct private_thread_info); |
| 1957 | |
| 1958 | thread->private_dtor = free_private_thread_info; |
| 1959 | thread->priv = priv; |
| 1960 | |
| 1961 | priv->core = -1; |
| 1962 | priv->extra = NULL; |
| 1963 | priv->name = NULL; |
| 1964 | priv->name = NULL; |
| 1965 | priv->last_resume_step = 0; |
| 1966 | priv->last_resume_sig = GDB_SIGNAL_0; |
| 1967 | priv->vcont_resumed = 0; |
| 1968 | priv->thread_handle = nullptr; |
| 1969 | } |
| 1970 | |
| 1971 | return thread->priv; |
| 1972 | } |
| 1973 | |
| 1974 | /* Return PTID's private thread data, creating it if necessary. */ |
| 1975 | |
| 1976 | static struct private_thread_info * |
| 1977 | get_private_info_ptid (ptid_t ptid) |
| 1978 | { |
| 1979 | struct thread_info *info = find_thread_ptid (ptid); |
| 1980 | |
| 1981 | return get_private_info_thread (info); |
| 1982 | } |
| 1983 | |
| 1984 | /* Call this function as a result of |
| 1985 | 1) A halt indication (T packet) containing a thread id |
| 1986 | 2) A direct query of currthread |
| 1987 | 3) Successful execution of set thread */ |
| 1988 | |
| 1989 | static void |
| 1990 | record_currthread (struct remote_state *rs, ptid_t currthread) |
| 1991 | { |
| 1992 | rs->general_thread = currthread; |
| 1993 | } |
| 1994 | |
| 1995 | /* If 'QPassSignals' is supported, tell the remote stub what signals |
| 1996 | it can simply pass through to the inferior without reporting. */ |
| 1997 | |
| 1998 | static void |
| 1999 | remote_pass_signals (struct target_ops *self, |
| 2000 | int numsigs, unsigned char *pass_signals) |
| 2001 | { |
| 2002 | if (packet_support (PACKET_QPassSignals) != PACKET_DISABLE) |
| 2003 | { |
| 2004 | char *pass_packet, *p; |
| 2005 | int count = 0, i; |
| 2006 | struct remote_state *rs = get_remote_state (); |
| 2007 | |
| 2008 | gdb_assert (numsigs < 256); |
| 2009 | for (i = 0; i < numsigs; i++) |
| 2010 | { |
| 2011 | if (pass_signals[i]) |
| 2012 | count++; |
| 2013 | } |
| 2014 | pass_packet = (char *) xmalloc (count * 3 + strlen ("QPassSignals:") + 1); |
| 2015 | strcpy (pass_packet, "QPassSignals:"); |
| 2016 | p = pass_packet + strlen (pass_packet); |
| 2017 | for (i = 0; i < numsigs; i++) |
| 2018 | { |
| 2019 | if (pass_signals[i]) |
| 2020 | { |
| 2021 | if (i >= 16) |
| 2022 | *p++ = tohex (i >> 4); |
| 2023 | *p++ = tohex (i & 15); |
| 2024 | if (count) |
| 2025 | *p++ = ';'; |
| 2026 | else |
| 2027 | break; |
| 2028 | count--; |
| 2029 | } |
| 2030 | } |
| 2031 | *p = 0; |
| 2032 | if (!rs->last_pass_packet || strcmp (rs->last_pass_packet, pass_packet)) |
| 2033 | { |
| 2034 | putpkt (pass_packet); |
| 2035 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2036 | packet_ok (rs->buf, &remote_protocol_packets[PACKET_QPassSignals]); |
| 2037 | if (rs->last_pass_packet) |
| 2038 | xfree (rs->last_pass_packet); |
| 2039 | rs->last_pass_packet = pass_packet; |
| 2040 | } |
| 2041 | else |
| 2042 | xfree (pass_packet); |
| 2043 | } |
| 2044 | } |
| 2045 | |
| 2046 | /* If 'QCatchSyscalls' is supported, tell the remote stub |
| 2047 | to report syscalls to GDB. */ |
| 2048 | |
| 2049 | static int |
| 2050 | remote_set_syscall_catchpoint (struct target_ops *self, |
| 2051 | int pid, int needed, int any_count, |
| 2052 | int table_size, int *table) |
| 2053 | { |
| 2054 | const char *catch_packet; |
| 2055 | enum packet_result result; |
| 2056 | int n_sysno = 0; |
| 2057 | |
| 2058 | if (packet_support (PACKET_QCatchSyscalls) == PACKET_DISABLE) |
| 2059 | { |
| 2060 | /* Not supported. */ |
| 2061 | return 1; |
| 2062 | } |
| 2063 | |
| 2064 | if (needed && !any_count) |
| 2065 | { |
| 2066 | int i; |
| 2067 | |
| 2068 | /* Count how many syscalls are to be caught (table[sysno] != 0). */ |
| 2069 | for (i = 0; i < table_size; i++) |
| 2070 | { |
| 2071 | if (table[i] != 0) |
| 2072 | n_sysno++; |
| 2073 | } |
| 2074 | } |
| 2075 | |
| 2076 | if (remote_debug) |
| 2077 | { |
| 2078 | fprintf_unfiltered (gdb_stdlog, |
| 2079 | "remote_set_syscall_catchpoint " |
| 2080 | "pid %d needed %d any_count %d n_sysno %d\n", |
| 2081 | pid, needed, any_count, n_sysno); |
| 2082 | } |
| 2083 | |
| 2084 | gdb::unique_xmalloc_ptr<char> built_packet; |
| 2085 | if (needed) |
| 2086 | { |
| 2087 | /* Prepare a packet with the sysno list, assuming max 8+1 |
| 2088 | characters for a sysno. If the resulting packet size is too |
| 2089 | big, fallback on the non-selective packet. */ |
| 2090 | const int maxpktsz = strlen ("QCatchSyscalls:1") + n_sysno * 9 + 1; |
| 2091 | |
| 2092 | built_packet.reset ((char *) xmalloc (maxpktsz)); |
| 2093 | strcpy (built_packet.get (), "QCatchSyscalls:1"); |
| 2094 | if (!any_count) |
| 2095 | { |
| 2096 | int i; |
| 2097 | char *p; |
| 2098 | |
| 2099 | p = built_packet.get (); |
| 2100 | p += strlen (p); |
| 2101 | |
| 2102 | /* Add in catch_packet each syscall to be caught (table[i] != 0). */ |
| 2103 | for (i = 0; i < table_size; i++) |
| 2104 | { |
| 2105 | if (table[i] != 0) |
| 2106 | p += xsnprintf (p, built_packet.get () + maxpktsz - p, |
| 2107 | ";%x", i); |
| 2108 | } |
| 2109 | } |
| 2110 | if (strlen (built_packet.get ()) > get_remote_packet_size ()) |
| 2111 | { |
| 2112 | /* catch_packet too big. Fallback to less efficient |
| 2113 | non selective mode, with GDB doing the filtering. */ |
| 2114 | catch_packet = "QCatchSyscalls:1"; |
| 2115 | } |
| 2116 | else |
| 2117 | catch_packet = built_packet.get (); |
| 2118 | } |
| 2119 | else |
| 2120 | catch_packet = "QCatchSyscalls:0"; |
| 2121 | |
| 2122 | struct remote_state *rs = get_remote_state (); |
| 2123 | |
| 2124 | putpkt (catch_packet); |
| 2125 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2126 | result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_QCatchSyscalls]); |
| 2127 | if (result == PACKET_OK) |
| 2128 | return 0; |
| 2129 | else |
| 2130 | return -1; |
| 2131 | } |
| 2132 | |
| 2133 | /* If 'QProgramSignals' is supported, tell the remote stub what |
| 2134 | signals it should pass through to the inferior when detaching. */ |
| 2135 | |
| 2136 | static void |
| 2137 | remote_program_signals (struct target_ops *self, |
| 2138 | int numsigs, unsigned char *signals) |
| 2139 | { |
| 2140 | if (packet_support (PACKET_QProgramSignals) != PACKET_DISABLE) |
| 2141 | { |
| 2142 | char *packet, *p; |
| 2143 | int count = 0, i; |
| 2144 | struct remote_state *rs = get_remote_state (); |
| 2145 | |
| 2146 | gdb_assert (numsigs < 256); |
| 2147 | for (i = 0; i < numsigs; i++) |
| 2148 | { |
| 2149 | if (signals[i]) |
| 2150 | count++; |
| 2151 | } |
| 2152 | packet = (char *) xmalloc (count * 3 + strlen ("QProgramSignals:") + 1); |
| 2153 | strcpy (packet, "QProgramSignals:"); |
| 2154 | p = packet + strlen (packet); |
| 2155 | for (i = 0; i < numsigs; i++) |
| 2156 | { |
| 2157 | if (signal_pass_state (i)) |
| 2158 | { |
| 2159 | if (i >= 16) |
| 2160 | *p++ = tohex (i >> 4); |
| 2161 | *p++ = tohex (i & 15); |
| 2162 | if (count) |
| 2163 | *p++ = ';'; |
| 2164 | else |
| 2165 | break; |
| 2166 | count--; |
| 2167 | } |
| 2168 | } |
| 2169 | *p = 0; |
| 2170 | if (!rs->last_program_signals_packet |
| 2171 | || strcmp (rs->last_program_signals_packet, packet) != 0) |
| 2172 | { |
| 2173 | putpkt (packet); |
| 2174 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2175 | packet_ok (rs->buf, &remote_protocol_packets[PACKET_QProgramSignals]); |
| 2176 | xfree (rs->last_program_signals_packet); |
| 2177 | rs->last_program_signals_packet = packet; |
| 2178 | } |
| 2179 | else |
| 2180 | xfree (packet); |
| 2181 | } |
| 2182 | } |
| 2183 | |
| 2184 | /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is |
| 2185 | MINUS_ONE_PTID, set the thread to -1, so the stub returns the |
| 2186 | thread. If GEN is set, set the general thread, if not, then set |
| 2187 | the step/continue thread. */ |
| 2188 | static void |
| 2189 | set_thread (ptid_t ptid, int gen) |
| 2190 | { |
| 2191 | struct remote_state *rs = get_remote_state (); |
| 2192 | ptid_t state = gen ? rs->general_thread : rs->continue_thread; |
| 2193 | char *buf = rs->buf; |
| 2194 | char *endbuf = rs->buf + get_remote_packet_size (); |
| 2195 | |
| 2196 | if (ptid_equal (state, ptid)) |
| 2197 | return; |
| 2198 | |
| 2199 | *buf++ = 'H'; |
| 2200 | *buf++ = gen ? 'g' : 'c'; |
| 2201 | if (ptid_equal (ptid, magic_null_ptid)) |
| 2202 | xsnprintf (buf, endbuf - buf, "0"); |
| 2203 | else if (ptid_equal (ptid, any_thread_ptid)) |
| 2204 | xsnprintf (buf, endbuf - buf, "0"); |
| 2205 | else if (ptid_equal (ptid, minus_one_ptid)) |
| 2206 | xsnprintf (buf, endbuf - buf, "-1"); |
| 2207 | else |
| 2208 | write_ptid (buf, endbuf, ptid); |
| 2209 | putpkt (rs->buf); |
| 2210 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2211 | if (gen) |
| 2212 | rs->general_thread = ptid; |
| 2213 | else |
| 2214 | rs->continue_thread = ptid; |
| 2215 | } |
| 2216 | |
| 2217 | static void |
| 2218 | set_general_thread (ptid_t ptid) |
| 2219 | { |
| 2220 | set_thread (ptid, 1); |
| 2221 | } |
| 2222 | |
| 2223 | static void |
| 2224 | set_continue_thread (ptid_t ptid) |
| 2225 | { |
| 2226 | set_thread (ptid, 0); |
| 2227 | } |
| 2228 | |
| 2229 | /* Change the remote current process. Which thread within the process |
| 2230 | ends up selected isn't important, as long as it is the same process |
| 2231 | as what INFERIOR_PTID points to. |
| 2232 | |
| 2233 | This comes from that fact that there is no explicit notion of |
| 2234 | "selected process" in the protocol. The selected process for |
| 2235 | general operations is the process the selected general thread |
| 2236 | belongs to. */ |
| 2237 | |
| 2238 | static void |
| 2239 | set_general_process (void) |
| 2240 | { |
| 2241 | struct remote_state *rs = get_remote_state (); |
| 2242 | |
| 2243 | /* If the remote can't handle multiple processes, don't bother. */ |
| 2244 | if (!remote_multi_process_p (rs)) |
| 2245 | return; |
| 2246 | |
| 2247 | /* We only need to change the remote current thread if it's pointing |
| 2248 | at some other process. */ |
| 2249 | if (ptid_get_pid (rs->general_thread) != ptid_get_pid (inferior_ptid)) |
| 2250 | set_general_thread (inferior_ptid); |
| 2251 | } |
| 2252 | |
| 2253 | \f |
| 2254 | /* Return nonzero if this is the main thread that we made up ourselves |
| 2255 | to model non-threaded targets as single-threaded. */ |
| 2256 | |
| 2257 | static int |
| 2258 | remote_thread_always_alive (struct target_ops *ops, ptid_t ptid) |
| 2259 | { |
| 2260 | if (ptid_equal (ptid, magic_null_ptid)) |
| 2261 | /* The main thread is always alive. */ |
| 2262 | return 1; |
| 2263 | |
| 2264 | if (ptid_get_pid (ptid) != 0 && ptid_get_lwp (ptid) == 0) |
| 2265 | /* The main thread is always alive. This can happen after a |
| 2266 | vAttach, if the remote side doesn't support |
| 2267 | multi-threading. */ |
| 2268 | return 1; |
| 2269 | |
| 2270 | return 0; |
| 2271 | } |
| 2272 | |
| 2273 | /* Return nonzero if the thread PTID is still alive on the remote |
| 2274 | system. */ |
| 2275 | |
| 2276 | static int |
| 2277 | remote_thread_alive (struct target_ops *ops, ptid_t ptid) |
| 2278 | { |
| 2279 | struct remote_state *rs = get_remote_state (); |
| 2280 | char *p, *endp; |
| 2281 | |
| 2282 | /* Check if this is a thread that we made up ourselves to model |
| 2283 | non-threaded targets as single-threaded. */ |
| 2284 | if (remote_thread_always_alive (ops, ptid)) |
| 2285 | return 1; |
| 2286 | |
| 2287 | p = rs->buf; |
| 2288 | endp = rs->buf + get_remote_packet_size (); |
| 2289 | |
| 2290 | *p++ = 'T'; |
| 2291 | write_ptid (p, endp, ptid); |
| 2292 | |
| 2293 | putpkt (rs->buf); |
| 2294 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2295 | return (rs->buf[0] == 'O' && rs->buf[1] == 'K'); |
| 2296 | } |
| 2297 | |
| 2298 | /* Return a pointer to a thread name if we know it and NULL otherwise. |
| 2299 | The thread_info object owns the memory for the name. */ |
| 2300 | |
| 2301 | static const char * |
| 2302 | remote_thread_name (struct target_ops *ops, struct thread_info *info) |
| 2303 | { |
| 2304 | if (info->priv != NULL) |
| 2305 | return info->priv->name; |
| 2306 | |
| 2307 | return NULL; |
| 2308 | } |
| 2309 | |
| 2310 | /* About these extended threadlist and threadinfo packets. They are |
| 2311 | variable length packets but, the fields within them are often fixed |
| 2312 | length. They are redundent enough to send over UDP as is the |
| 2313 | remote protocol in general. There is a matching unit test module |
| 2314 | in libstub. */ |
| 2315 | |
| 2316 | /* WARNING: This threadref data structure comes from the remote O.S., |
| 2317 | libstub protocol encoding, and remote.c. It is not particularly |
| 2318 | changable. */ |
| 2319 | |
| 2320 | /* Right now, the internal structure is int. We want it to be bigger. |
| 2321 | Plan to fix this. */ |
| 2322 | |
| 2323 | typedef int gdb_threadref; /* Internal GDB thread reference. */ |
| 2324 | |
| 2325 | /* gdb_ext_thread_info is an internal GDB data structure which is |
| 2326 | equivalent to the reply of the remote threadinfo packet. */ |
| 2327 | |
| 2328 | struct gdb_ext_thread_info |
| 2329 | { |
| 2330 | threadref threadid; /* External form of thread reference. */ |
| 2331 | int active; /* Has state interesting to GDB? |
| 2332 | regs, stack. */ |
| 2333 | char display[256]; /* Brief state display, name, |
| 2334 | blocked/suspended. */ |
| 2335 | char shortname[32]; /* To be used to name threads. */ |
| 2336 | char more_display[256]; /* Long info, statistics, queue depth, |
| 2337 | whatever. */ |
| 2338 | }; |
| 2339 | |
| 2340 | /* The volume of remote transfers can be limited by submitting |
| 2341 | a mask containing bits specifying the desired information. |
| 2342 | Use a union of these values as the 'selection' parameter to |
| 2343 | get_thread_info. FIXME: Make these TAG names more thread specific. */ |
| 2344 | |
| 2345 | #define TAG_THREADID 1 |
| 2346 | #define TAG_EXISTS 2 |
| 2347 | #define TAG_DISPLAY 4 |
| 2348 | #define TAG_THREADNAME 8 |
| 2349 | #define TAG_MOREDISPLAY 16 |
| 2350 | |
| 2351 | #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2) |
| 2352 | |
| 2353 | static char *unpack_nibble (char *buf, int *val); |
| 2354 | |
| 2355 | static char *unpack_byte (char *buf, int *value); |
| 2356 | |
| 2357 | static char *pack_int (char *buf, int value); |
| 2358 | |
| 2359 | static char *unpack_int (char *buf, int *value); |
| 2360 | |
| 2361 | static char *unpack_string (char *src, char *dest, int length); |
| 2362 | |
| 2363 | static char *pack_threadid (char *pkt, threadref *id); |
| 2364 | |
| 2365 | static char *unpack_threadid (char *inbuf, threadref *id); |
| 2366 | |
| 2367 | void int_to_threadref (threadref *id, int value); |
| 2368 | |
| 2369 | static int threadref_to_int (threadref *ref); |
| 2370 | |
| 2371 | static void copy_threadref (threadref *dest, threadref *src); |
| 2372 | |
| 2373 | static int threadmatch (threadref *dest, threadref *src); |
| 2374 | |
| 2375 | static char *pack_threadinfo_request (char *pkt, int mode, |
| 2376 | threadref *id); |
| 2377 | |
| 2378 | static int remote_unpack_thread_info_response (char *pkt, |
| 2379 | threadref *expectedref, |
| 2380 | struct gdb_ext_thread_info |
| 2381 | *info); |
| 2382 | |
| 2383 | |
| 2384 | static int remote_get_threadinfo (threadref *threadid, |
| 2385 | int fieldset, /*TAG mask */ |
| 2386 | struct gdb_ext_thread_info *info); |
| 2387 | |
| 2388 | static char *pack_threadlist_request (char *pkt, int startflag, |
| 2389 | int threadcount, |
| 2390 | threadref *nextthread); |
| 2391 | |
| 2392 | static int parse_threadlist_response (char *pkt, |
| 2393 | int result_limit, |
| 2394 | threadref *original_echo, |
| 2395 | threadref *resultlist, |
| 2396 | int *doneflag); |
| 2397 | |
| 2398 | static int remote_get_threadlist (int startflag, |
| 2399 | threadref *nextthread, |
| 2400 | int result_limit, |
| 2401 | int *done, |
| 2402 | int *result_count, |
| 2403 | threadref *threadlist); |
| 2404 | |
| 2405 | typedef int (*rmt_thread_action) (threadref *ref, void *context); |
| 2406 | |
| 2407 | static int remote_threadlist_iterator (rmt_thread_action stepfunction, |
| 2408 | void *context, int looplimit); |
| 2409 | |
| 2410 | static int remote_newthread_step (threadref *ref, void *context); |
| 2411 | |
| 2412 | |
| 2413 | /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the |
| 2414 | buffer we're allowed to write to. Returns |
| 2415 | BUF+CHARACTERS_WRITTEN. */ |
| 2416 | |
| 2417 | static char * |
| 2418 | write_ptid (char *buf, const char *endbuf, ptid_t ptid) |
| 2419 | { |
| 2420 | int pid, tid; |
| 2421 | struct remote_state *rs = get_remote_state (); |
| 2422 | |
| 2423 | if (remote_multi_process_p (rs)) |
| 2424 | { |
| 2425 | pid = ptid_get_pid (ptid); |
| 2426 | if (pid < 0) |
| 2427 | buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid); |
| 2428 | else |
| 2429 | buf += xsnprintf (buf, endbuf - buf, "p%x.", pid); |
| 2430 | } |
| 2431 | tid = ptid_get_lwp (ptid); |
| 2432 | if (tid < 0) |
| 2433 | buf += xsnprintf (buf, endbuf - buf, "-%x", -tid); |
| 2434 | else |
| 2435 | buf += xsnprintf (buf, endbuf - buf, "%x", tid); |
| 2436 | |
| 2437 | return buf; |
| 2438 | } |
| 2439 | |
| 2440 | /* Extract a PTID from BUF. If non-null, OBUF is set to one past the |
| 2441 | last parsed char. Returns null_ptid if no thread id is found, and |
| 2442 | throws an error if the thread id has an invalid format. */ |
| 2443 | |
| 2444 | static ptid_t |
| 2445 | read_ptid (const char *buf, const char **obuf) |
| 2446 | { |
| 2447 | const char *p = buf; |
| 2448 | const char *pp; |
| 2449 | ULONGEST pid = 0, tid = 0; |
| 2450 | |
| 2451 | if (*p == 'p') |
| 2452 | { |
| 2453 | /* Multi-process ptid. */ |
| 2454 | pp = unpack_varlen_hex (p + 1, &pid); |
| 2455 | if (*pp != '.') |
| 2456 | error (_("invalid remote ptid: %s"), p); |
| 2457 | |
| 2458 | p = pp; |
| 2459 | pp = unpack_varlen_hex (p + 1, &tid); |
| 2460 | if (obuf) |
| 2461 | *obuf = pp; |
| 2462 | return ptid_build (pid, tid, 0); |
| 2463 | } |
| 2464 | |
| 2465 | /* No multi-process. Just a tid. */ |
| 2466 | pp = unpack_varlen_hex (p, &tid); |
| 2467 | |
| 2468 | /* Return null_ptid when no thread id is found. */ |
| 2469 | if (p == pp) |
| 2470 | { |
| 2471 | if (obuf) |
| 2472 | *obuf = pp; |
| 2473 | return null_ptid; |
| 2474 | } |
| 2475 | |
| 2476 | /* Since the stub is not sending a process id, then default to |
| 2477 | what's in inferior_ptid, unless it's null at this point. If so, |
| 2478 | then since there's no way to know the pid of the reported |
| 2479 | threads, use the magic number. */ |
| 2480 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 2481 | pid = ptid_get_pid (magic_null_ptid); |
| 2482 | else |
| 2483 | pid = ptid_get_pid (inferior_ptid); |
| 2484 | |
| 2485 | if (obuf) |
| 2486 | *obuf = pp; |
| 2487 | return ptid_build (pid, tid, 0); |
| 2488 | } |
| 2489 | |
| 2490 | static int |
| 2491 | stubhex (int ch) |
| 2492 | { |
| 2493 | if (ch >= 'a' && ch <= 'f') |
| 2494 | return ch - 'a' + 10; |
| 2495 | if (ch >= '0' && ch <= '9') |
| 2496 | return ch - '0'; |
| 2497 | if (ch >= 'A' && ch <= 'F') |
| 2498 | return ch - 'A' + 10; |
| 2499 | return -1; |
| 2500 | } |
| 2501 | |
| 2502 | static int |
| 2503 | stub_unpack_int (char *buff, int fieldlength) |
| 2504 | { |
| 2505 | int nibble; |
| 2506 | int retval = 0; |
| 2507 | |
| 2508 | while (fieldlength) |
| 2509 | { |
| 2510 | nibble = stubhex (*buff++); |
| 2511 | retval |= nibble; |
| 2512 | fieldlength--; |
| 2513 | if (fieldlength) |
| 2514 | retval = retval << 4; |
| 2515 | } |
| 2516 | return retval; |
| 2517 | } |
| 2518 | |
| 2519 | static char * |
| 2520 | unpack_nibble (char *buf, int *val) |
| 2521 | { |
| 2522 | *val = fromhex (*buf++); |
| 2523 | return buf; |
| 2524 | } |
| 2525 | |
| 2526 | static char * |
| 2527 | unpack_byte (char *buf, int *value) |
| 2528 | { |
| 2529 | *value = stub_unpack_int (buf, 2); |
| 2530 | return buf + 2; |
| 2531 | } |
| 2532 | |
| 2533 | static char * |
| 2534 | pack_int (char *buf, int value) |
| 2535 | { |
| 2536 | buf = pack_hex_byte (buf, (value >> 24) & 0xff); |
| 2537 | buf = pack_hex_byte (buf, (value >> 16) & 0xff); |
| 2538 | buf = pack_hex_byte (buf, (value >> 8) & 0x0ff); |
| 2539 | buf = pack_hex_byte (buf, (value & 0xff)); |
| 2540 | return buf; |
| 2541 | } |
| 2542 | |
| 2543 | static char * |
| 2544 | unpack_int (char *buf, int *value) |
| 2545 | { |
| 2546 | *value = stub_unpack_int (buf, 8); |
| 2547 | return buf + 8; |
| 2548 | } |
| 2549 | |
| 2550 | #if 0 /* Currently unused, uncomment when needed. */ |
| 2551 | static char *pack_string (char *pkt, char *string); |
| 2552 | |
| 2553 | static char * |
| 2554 | pack_string (char *pkt, char *string) |
| 2555 | { |
| 2556 | char ch; |
| 2557 | int len; |
| 2558 | |
| 2559 | len = strlen (string); |
| 2560 | if (len > 200) |
| 2561 | len = 200; /* Bigger than most GDB packets, junk??? */ |
| 2562 | pkt = pack_hex_byte (pkt, len); |
| 2563 | while (len-- > 0) |
| 2564 | { |
| 2565 | ch = *string++; |
| 2566 | if ((ch == '\0') || (ch == '#')) |
| 2567 | ch = '*'; /* Protect encapsulation. */ |
| 2568 | *pkt++ = ch; |
| 2569 | } |
| 2570 | return pkt; |
| 2571 | } |
| 2572 | #endif /* 0 (unused) */ |
| 2573 | |
| 2574 | static char * |
| 2575 | unpack_string (char *src, char *dest, int length) |
| 2576 | { |
| 2577 | while (length--) |
| 2578 | *dest++ = *src++; |
| 2579 | *dest = '\0'; |
| 2580 | return src; |
| 2581 | } |
| 2582 | |
| 2583 | static char * |
| 2584 | pack_threadid (char *pkt, threadref *id) |
| 2585 | { |
| 2586 | char *limit; |
| 2587 | unsigned char *altid; |
| 2588 | |
| 2589 | altid = (unsigned char *) id; |
| 2590 | limit = pkt + BUF_THREAD_ID_SIZE; |
| 2591 | while (pkt < limit) |
| 2592 | pkt = pack_hex_byte (pkt, *altid++); |
| 2593 | return pkt; |
| 2594 | } |
| 2595 | |
| 2596 | |
| 2597 | static char * |
| 2598 | unpack_threadid (char *inbuf, threadref *id) |
| 2599 | { |
| 2600 | char *altref; |
| 2601 | char *limit = inbuf + BUF_THREAD_ID_SIZE; |
| 2602 | int x, y; |
| 2603 | |
| 2604 | altref = (char *) id; |
| 2605 | |
| 2606 | while (inbuf < limit) |
| 2607 | { |
| 2608 | x = stubhex (*inbuf++); |
| 2609 | y = stubhex (*inbuf++); |
| 2610 | *altref++ = (x << 4) | y; |
| 2611 | } |
| 2612 | return inbuf; |
| 2613 | } |
| 2614 | |
| 2615 | /* Externally, threadrefs are 64 bits but internally, they are still |
| 2616 | ints. This is due to a mismatch of specifications. We would like |
| 2617 | to use 64bit thread references internally. This is an adapter |
| 2618 | function. */ |
| 2619 | |
| 2620 | void |
| 2621 | int_to_threadref (threadref *id, int value) |
| 2622 | { |
| 2623 | unsigned char *scan; |
| 2624 | |
| 2625 | scan = (unsigned char *) id; |
| 2626 | { |
| 2627 | int i = 4; |
| 2628 | while (i--) |
| 2629 | *scan++ = 0; |
| 2630 | } |
| 2631 | *scan++ = (value >> 24) & 0xff; |
| 2632 | *scan++ = (value >> 16) & 0xff; |
| 2633 | *scan++ = (value >> 8) & 0xff; |
| 2634 | *scan++ = (value & 0xff); |
| 2635 | } |
| 2636 | |
| 2637 | static int |
| 2638 | threadref_to_int (threadref *ref) |
| 2639 | { |
| 2640 | int i, value = 0; |
| 2641 | unsigned char *scan; |
| 2642 | |
| 2643 | scan = *ref; |
| 2644 | scan += 4; |
| 2645 | i = 4; |
| 2646 | while (i-- > 0) |
| 2647 | value = (value << 8) | ((*scan++) & 0xff); |
| 2648 | return value; |
| 2649 | } |
| 2650 | |
| 2651 | static void |
| 2652 | copy_threadref (threadref *dest, threadref *src) |
| 2653 | { |
| 2654 | int i; |
| 2655 | unsigned char *csrc, *cdest; |
| 2656 | |
| 2657 | csrc = (unsigned char *) src; |
| 2658 | cdest = (unsigned char *) dest; |
| 2659 | i = 8; |
| 2660 | while (i--) |
| 2661 | *cdest++ = *csrc++; |
| 2662 | } |
| 2663 | |
| 2664 | static int |
| 2665 | threadmatch (threadref *dest, threadref *src) |
| 2666 | { |
| 2667 | /* Things are broken right now, so just assume we got a match. */ |
| 2668 | #if 0 |
| 2669 | unsigned char *srcp, *destp; |
| 2670 | int i, result; |
| 2671 | srcp = (char *) src; |
| 2672 | destp = (char *) dest; |
| 2673 | |
| 2674 | result = 1; |
| 2675 | while (i-- > 0) |
| 2676 | result &= (*srcp++ == *destp++) ? 1 : 0; |
| 2677 | return result; |
| 2678 | #endif |
| 2679 | return 1; |
| 2680 | } |
| 2681 | |
| 2682 | /* |
| 2683 | threadid:1, # always request threadid |
| 2684 | context_exists:2, |
| 2685 | display:4, |
| 2686 | unique_name:8, |
| 2687 | more_display:16 |
| 2688 | */ |
| 2689 | |
| 2690 | /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */ |
| 2691 | |
| 2692 | static char * |
| 2693 | pack_threadinfo_request (char *pkt, int mode, threadref *id) |
| 2694 | { |
| 2695 | *pkt++ = 'q'; /* Info Query */ |
| 2696 | *pkt++ = 'P'; /* process or thread info */ |
| 2697 | pkt = pack_int (pkt, mode); /* mode */ |
| 2698 | pkt = pack_threadid (pkt, id); /* threadid */ |
| 2699 | *pkt = '\0'; /* terminate */ |
| 2700 | return pkt; |
| 2701 | } |
| 2702 | |
| 2703 | /* These values tag the fields in a thread info response packet. */ |
| 2704 | /* Tagging the fields allows us to request specific fields and to |
| 2705 | add more fields as time goes by. */ |
| 2706 | |
| 2707 | #define TAG_THREADID 1 /* Echo the thread identifier. */ |
| 2708 | #define TAG_EXISTS 2 /* Is this process defined enough to |
| 2709 | fetch registers and its stack? */ |
| 2710 | #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */ |
| 2711 | #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */ |
| 2712 | #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about |
| 2713 | the process. */ |
| 2714 | |
| 2715 | static int |
| 2716 | remote_unpack_thread_info_response (char *pkt, threadref *expectedref, |
| 2717 | struct gdb_ext_thread_info *info) |
| 2718 | { |
| 2719 | struct remote_state *rs = get_remote_state (); |
| 2720 | int mask, length; |
| 2721 | int tag; |
| 2722 | threadref ref; |
| 2723 | char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */ |
| 2724 | int retval = 1; |
| 2725 | |
| 2726 | /* info->threadid = 0; FIXME: implement zero_threadref. */ |
| 2727 | info->active = 0; |
| 2728 | info->display[0] = '\0'; |
| 2729 | info->shortname[0] = '\0'; |
| 2730 | info->more_display[0] = '\0'; |
| 2731 | |
| 2732 | /* Assume the characters indicating the packet type have been |
| 2733 | stripped. */ |
| 2734 | pkt = unpack_int (pkt, &mask); /* arg mask */ |
| 2735 | pkt = unpack_threadid (pkt, &ref); |
| 2736 | |
| 2737 | if (mask == 0) |
| 2738 | warning (_("Incomplete response to threadinfo request.")); |
| 2739 | if (!threadmatch (&ref, expectedref)) |
| 2740 | { /* This is an answer to a different request. */ |
| 2741 | warning (_("ERROR RMT Thread info mismatch.")); |
| 2742 | return 0; |
| 2743 | } |
| 2744 | copy_threadref (&info->threadid, &ref); |
| 2745 | |
| 2746 | /* Loop on tagged fields , try to bail if somthing goes wrong. */ |
| 2747 | |
| 2748 | /* Packets are terminated with nulls. */ |
| 2749 | while ((pkt < limit) && mask && *pkt) |
| 2750 | { |
| 2751 | pkt = unpack_int (pkt, &tag); /* tag */ |
| 2752 | pkt = unpack_byte (pkt, &length); /* length */ |
| 2753 | if (!(tag & mask)) /* Tags out of synch with mask. */ |
| 2754 | { |
| 2755 | warning (_("ERROR RMT: threadinfo tag mismatch.")); |
| 2756 | retval = 0; |
| 2757 | break; |
| 2758 | } |
| 2759 | if (tag == TAG_THREADID) |
| 2760 | { |
| 2761 | if (length != 16) |
| 2762 | { |
| 2763 | warning (_("ERROR RMT: length of threadid is not 16.")); |
| 2764 | retval = 0; |
| 2765 | break; |
| 2766 | } |
| 2767 | pkt = unpack_threadid (pkt, &ref); |
| 2768 | mask = mask & ~TAG_THREADID; |
| 2769 | continue; |
| 2770 | } |
| 2771 | if (tag == TAG_EXISTS) |
| 2772 | { |
| 2773 | info->active = stub_unpack_int (pkt, length); |
| 2774 | pkt += length; |
| 2775 | mask = mask & ~(TAG_EXISTS); |
| 2776 | if (length > 8) |
| 2777 | { |
| 2778 | warning (_("ERROR RMT: 'exists' length too long.")); |
| 2779 | retval = 0; |
| 2780 | break; |
| 2781 | } |
| 2782 | continue; |
| 2783 | } |
| 2784 | if (tag == TAG_THREADNAME) |
| 2785 | { |
| 2786 | pkt = unpack_string (pkt, &info->shortname[0], length); |
| 2787 | mask = mask & ~TAG_THREADNAME; |
| 2788 | continue; |
| 2789 | } |
| 2790 | if (tag == TAG_DISPLAY) |
| 2791 | { |
| 2792 | pkt = unpack_string (pkt, &info->display[0], length); |
| 2793 | mask = mask & ~TAG_DISPLAY; |
| 2794 | continue; |
| 2795 | } |
| 2796 | if (tag == TAG_MOREDISPLAY) |
| 2797 | { |
| 2798 | pkt = unpack_string (pkt, &info->more_display[0], length); |
| 2799 | mask = mask & ~TAG_MOREDISPLAY; |
| 2800 | continue; |
| 2801 | } |
| 2802 | warning (_("ERROR RMT: unknown thread info tag.")); |
| 2803 | break; /* Not a tag we know about. */ |
| 2804 | } |
| 2805 | return retval; |
| 2806 | } |
| 2807 | |
| 2808 | static int |
| 2809 | remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */ |
| 2810 | struct gdb_ext_thread_info *info) |
| 2811 | { |
| 2812 | struct remote_state *rs = get_remote_state (); |
| 2813 | int result; |
| 2814 | |
| 2815 | pack_threadinfo_request (rs->buf, fieldset, threadid); |
| 2816 | putpkt (rs->buf); |
| 2817 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2818 | |
| 2819 | if (rs->buf[0] == '\0') |
| 2820 | return 0; |
| 2821 | |
| 2822 | result = remote_unpack_thread_info_response (rs->buf + 2, |
| 2823 | threadid, info); |
| 2824 | return result; |
| 2825 | } |
| 2826 | |
| 2827 | /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */ |
| 2828 | |
| 2829 | static char * |
| 2830 | pack_threadlist_request (char *pkt, int startflag, int threadcount, |
| 2831 | threadref *nextthread) |
| 2832 | { |
| 2833 | *pkt++ = 'q'; /* info query packet */ |
| 2834 | *pkt++ = 'L'; /* Process LIST or threadLIST request */ |
| 2835 | pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */ |
| 2836 | pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */ |
| 2837 | pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */ |
| 2838 | *pkt = '\0'; |
| 2839 | return pkt; |
| 2840 | } |
| 2841 | |
| 2842 | /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */ |
| 2843 | |
| 2844 | static int |
| 2845 | parse_threadlist_response (char *pkt, int result_limit, |
| 2846 | threadref *original_echo, threadref *resultlist, |
| 2847 | int *doneflag) |
| 2848 | { |
| 2849 | struct remote_state *rs = get_remote_state (); |
| 2850 | char *limit; |
| 2851 | int count, resultcount, done; |
| 2852 | |
| 2853 | resultcount = 0; |
| 2854 | /* Assume the 'q' and 'M chars have been stripped. */ |
| 2855 | limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE); |
| 2856 | /* done parse past here */ |
| 2857 | pkt = unpack_byte (pkt, &count); /* count field */ |
| 2858 | pkt = unpack_nibble (pkt, &done); |
| 2859 | /* The first threadid is the argument threadid. */ |
| 2860 | pkt = unpack_threadid (pkt, original_echo); /* should match query packet */ |
| 2861 | while ((count-- > 0) && (pkt < limit)) |
| 2862 | { |
| 2863 | pkt = unpack_threadid (pkt, resultlist++); |
| 2864 | if (resultcount++ >= result_limit) |
| 2865 | break; |
| 2866 | } |
| 2867 | if (doneflag) |
| 2868 | *doneflag = done; |
| 2869 | return resultcount; |
| 2870 | } |
| 2871 | |
| 2872 | /* Fetch the next batch of threads from the remote. Returns -1 if the |
| 2873 | qL packet is not supported, 0 on error and 1 on success. */ |
| 2874 | |
| 2875 | static int |
| 2876 | remote_get_threadlist (int startflag, threadref *nextthread, int result_limit, |
| 2877 | int *done, int *result_count, threadref *threadlist) |
| 2878 | { |
| 2879 | struct remote_state *rs = get_remote_state (); |
| 2880 | int result = 1; |
| 2881 | |
| 2882 | /* Trancate result limit to be smaller than the packet size. */ |
| 2883 | if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) |
| 2884 | >= get_remote_packet_size ()) |
| 2885 | result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2; |
| 2886 | |
| 2887 | pack_threadlist_request (rs->buf, startflag, result_limit, nextthread); |
| 2888 | putpkt (rs->buf); |
| 2889 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2890 | if (*rs->buf == '\0') |
| 2891 | { |
| 2892 | /* Packet not supported. */ |
| 2893 | return -1; |
| 2894 | } |
| 2895 | |
| 2896 | *result_count = |
| 2897 | parse_threadlist_response (rs->buf + 2, result_limit, |
| 2898 | &rs->echo_nextthread, threadlist, done); |
| 2899 | |
| 2900 | if (!threadmatch (&rs->echo_nextthread, nextthread)) |
| 2901 | { |
| 2902 | /* FIXME: This is a good reason to drop the packet. */ |
| 2903 | /* Possably, there is a duplicate response. */ |
| 2904 | /* Possabilities : |
| 2905 | retransmit immediatly - race conditions |
| 2906 | retransmit after timeout - yes |
| 2907 | exit |
| 2908 | wait for packet, then exit |
| 2909 | */ |
| 2910 | warning (_("HMM: threadlist did not echo arg thread, dropping it.")); |
| 2911 | return 0; /* I choose simply exiting. */ |
| 2912 | } |
| 2913 | if (*result_count <= 0) |
| 2914 | { |
| 2915 | if (*done != 1) |
| 2916 | { |
| 2917 | warning (_("RMT ERROR : failed to get remote thread list.")); |
| 2918 | result = 0; |
| 2919 | } |
| 2920 | return result; /* break; */ |
| 2921 | } |
| 2922 | if (*result_count > result_limit) |
| 2923 | { |
| 2924 | *result_count = 0; |
| 2925 | warning (_("RMT ERROR: threadlist response longer than requested.")); |
| 2926 | return 0; |
| 2927 | } |
| 2928 | return result; |
| 2929 | } |
| 2930 | |
| 2931 | /* Fetch the list of remote threads, with the qL packet, and call |
| 2932 | STEPFUNCTION for each thread found. Stops iterating and returns 1 |
| 2933 | if STEPFUNCTION returns true. Stops iterating and returns 0 if the |
| 2934 | STEPFUNCTION returns false. If the packet is not supported, |
| 2935 | returns -1. */ |
| 2936 | |
| 2937 | static int |
| 2938 | remote_threadlist_iterator (rmt_thread_action stepfunction, void *context, |
| 2939 | int looplimit) |
| 2940 | { |
| 2941 | struct remote_state *rs = get_remote_state (); |
| 2942 | int done, i, result_count; |
| 2943 | int startflag = 1; |
| 2944 | int result = 1; |
| 2945 | int loopcount = 0; |
| 2946 | |
| 2947 | done = 0; |
| 2948 | while (!done) |
| 2949 | { |
| 2950 | if (loopcount++ > looplimit) |
| 2951 | { |
| 2952 | result = 0; |
| 2953 | warning (_("Remote fetch threadlist -infinite loop-.")); |
| 2954 | break; |
| 2955 | } |
| 2956 | result = remote_get_threadlist (startflag, &rs->nextthread, |
| 2957 | MAXTHREADLISTRESULTS, |
| 2958 | &done, &result_count, |
| 2959 | rs->resultthreadlist); |
| 2960 | if (result <= 0) |
| 2961 | break; |
| 2962 | /* Clear for later iterations. */ |
| 2963 | startflag = 0; |
| 2964 | /* Setup to resume next batch of thread references, set nextthread. */ |
| 2965 | if (result_count >= 1) |
| 2966 | copy_threadref (&rs->nextthread, |
| 2967 | &rs->resultthreadlist[result_count - 1]); |
| 2968 | i = 0; |
| 2969 | while (result_count--) |
| 2970 | { |
| 2971 | if (!(*stepfunction) (&rs->resultthreadlist[i++], context)) |
| 2972 | { |
| 2973 | result = 0; |
| 2974 | break; |
| 2975 | } |
| 2976 | } |
| 2977 | } |
| 2978 | return result; |
| 2979 | } |
| 2980 | |
| 2981 | /* A thread found on the remote target. */ |
| 2982 | |
| 2983 | typedef struct thread_item |
| 2984 | { |
| 2985 | /* The thread's PTID. */ |
| 2986 | ptid_t ptid; |
| 2987 | |
| 2988 | /* The thread's extra info. May be NULL. */ |
| 2989 | char *extra; |
| 2990 | |
| 2991 | /* The thread's name. May be NULL. */ |
| 2992 | char *name; |
| 2993 | |
| 2994 | /* The core the thread was running on. -1 if not known. */ |
| 2995 | int core; |
| 2996 | |
| 2997 | /* The thread handle associated with the thread. */ |
| 2998 | gdb::byte_vector *thread_handle; |
| 2999 | |
| 3000 | } thread_item_t; |
| 3001 | DEF_VEC_O(thread_item_t); |
| 3002 | |
| 3003 | /* Context passed around to the various methods listing remote |
| 3004 | threads. As new threads are found, they're added to the ITEMS |
| 3005 | vector. */ |
| 3006 | |
| 3007 | struct threads_listing_context |
| 3008 | { |
| 3009 | /* The threads found on the remote target. */ |
| 3010 | VEC (thread_item_t) *items; |
| 3011 | }; |
| 3012 | |
| 3013 | /* Discard the contents of the constructed thread listing context. */ |
| 3014 | |
| 3015 | static void |
| 3016 | clear_threads_listing_context (void *p) |
| 3017 | { |
| 3018 | struct threads_listing_context *context |
| 3019 | = (struct threads_listing_context *) p; |
| 3020 | int i; |
| 3021 | struct thread_item *item; |
| 3022 | |
| 3023 | for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i) |
| 3024 | { |
| 3025 | xfree (item->extra); |
| 3026 | xfree (item->name); |
| 3027 | delete item->thread_handle; |
| 3028 | } |
| 3029 | |
| 3030 | VEC_free (thread_item_t, context->items); |
| 3031 | } |
| 3032 | |
| 3033 | /* Remove the thread specified as the related_pid field of WS |
| 3034 | from the CONTEXT list. */ |
| 3035 | |
| 3036 | static void |
| 3037 | threads_listing_context_remove (struct target_waitstatus *ws, |
| 3038 | struct threads_listing_context *context) |
| 3039 | { |
| 3040 | struct thread_item *item; |
| 3041 | int i; |
| 3042 | ptid_t child_ptid = ws->value.related_pid; |
| 3043 | |
| 3044 | for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i) |
| 3045 | { |
| 3046 | if (ptid_equal (item->ptid, child_ptid)) |
| 3047 | { |
| 3048 | VEC_ordered_remove (thread_item_t, context->items, i); |
| 3049 | break; |
| 3050 | } |
| 3051 | } |
| 3052 | } |
| 3053 | |
| 3054 | static int |
| 3055 | remote_newthread_step (threadref *ref, void *data) |
| 3056 | { |
| 3057 | struct threads_listing_context *context |
| 3058 | = (struct threads_listing_context *) data; |
| 3059 | struct thread_item item; |
| 3060 | int pid = ptid_get_pid (inferior_ptid); |
| 3061 | |
| 3062 | item.ptid = ptid_build (pid, threadref_to_int (ref), 0); |
| 3063 | item.core = -1; |
| 3064 | item.name = NULL; |
| 3065 | item.extra = NULL; |
| 3066 | item.thread_handle = nullptr; |
| 3067 | |
| 3068 | VEC_safe_push (thread_item_t, context->items, &item); |
| 3069 | |
| 3070 | return 1; /* continue iterator */ |
| 3071 | } |
| 3072 | |
| 3073 | #define CRAZY_MAX_THREADS 1000 |
| 3074 | |
| 3075 | static ptid_t |
| 3076 | remote_current_thread (ptid_t oldpid) |
| 3077 | { |
| 3078 | struct remote_state *rs = get_remote_state (); |
| 3079 | |
| 3080 | putpkt ("qC"); |
| 3081 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 3082 | if (rs->buf[0] == 'Q' && rs->buf[1] == 'C') |
| 3083 | { |
| 3084 | const char *obuf; |
| 3085 | ptid_t result; |
| 3086 | |
| 3087 | result = read_ptid (&rs->buf[2], &obuf); |
| 3088 | if (*obuf != '\0' && remote_debug) |
| 3089 | fprintf_unfiltered (gdb_stdlog, |
| 3090 | "warning: garbage in qC reply\n"); |
| 3091 | |
| 3092 | return result; |
| 3093 | } |
| 3094 | else |
| 3095 | return oldpid; |
| 3096 | } |
| 3097 | |
| 3098 | /* List remote threads using the deprecated qL packet. */ |
| 3099 | |
| 3100 | static int |
| 3101 | remote_get_threads_with_ql (struct target_ops *ops, |
| 3102 | struct threads_listing_context *context) |
| 3103 | { |
| 3104 | if (remote_threadlist_iterator (remote_newthread_step, context, |
| 3105 | CRAZY_MAX_THREADS) >= 0) |
| 3106 | return 1; |
| 3107 | |
| 3108 | return 0; |
| 3109 | } |
| 3110 | |
| 3111 | #if defined(HAVE_LIBEXPAT) |
| 3112 | |
| 3113 | static void |
| 3114 | start_thread (struct gdb_xml_parser *parser, |
| 3115 | const struct gdb_xml_element *element, |
| 3116 | void *user_data, VEC(gdb_xml_value_s) *attributes) |
| 3117 | { |
| 3118 | struct threads_listing_context *data |
| 3119 | = (struct threads_listing_context *) user_data; |
| 3120 | |
| 3121 | struct thread_item item; |
| 3122 | char *id; |
| 3123 | struct gdb_xml_value *attr; |
| 3124 | |
| 3125 | id = (char *) xml_find_attribute (attributes, "id")->value; |
| 3126 | item.ptid = read_ptid (id, NULL); |
| 3127 | |
| 3128 | attr = xml_find_attribute (attributes, "core"); |
| 3129 | if (attr != NULL) |
| 3130 | item.core = *(ULONGEST *) attr->value; |
| 3131 | else |
| 3132 | item.core = -1; |
| 3133 | |
| 3134 | attr = xml_find_attribute (attributes, "name"); |
| 3135 | item.name = attr != NULL ? xstrdup ((const char *) attr->value) : NULL; |
| 3136 | |
| 3137 | attr = xml_find_attribute (attributes, "handle"); |
| 3138 | if (attr != NULL) |
| 3139 | { |
| 3140 | item.thread_handle = new gdb::byte_vector |
| 3141 | (strlen ((const char *) attr->value) / 2); |
| 3142 | hex2bin ((const char *) attr->value, item.thread_handle->data (), |
| 3143 | item.thread_handle->size ()); |
| 3144 | } |
| 3145 | else |
| 3146 | item.thread_handle = nullptr; |
| 3147 | |
| 3148 | item.extra = 0; |
| 3149 | |
| 3150 | VEC_safe_push (thread_item_t, data->items, &item); |
| 3151 | } |
| 3152 | |
| 3153 | static void |
| 3154 | end_thread (struct gdb_xml_parser *parser, |
| 3155 | const struct gdb_xml_element *element, |
| 3156 | void *user_data, const char *body_text) |
| 3157 | { |
| 3158 | struct threads_listing_context *data |
| 3159 | = (struct threads_listing_context *) user_data; |
| 3160 | |
| 3161 | if (body_text && *body_text) |
| 3162 | VEC_last (thread_item_t, data->items)->extra = xstrdup (body_text); |
| 3163 | } |
| 3164 | |
| 3165 | const struct gdb_xml_attribute thread_attributes[] = { |
| 3166 | { "id", GDB_XML_AF_NONE, NULL, NULL }, |
| 3167 | { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL }, |
| 3168 | { "name", GDB_XML_AF_OPTIONAL, NULL, NULL }, |
| 3169 | { "handle", GDB_XML_AF_OPTIONAL, NULL, NULL }, |
| 3170 | { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| 3171 | }; |
| 3172 | |
| 3173 | const struct gdb_xml_element thread_children[] = { |
| 3174 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| 3175 | }; |
| 3176 | |
| 3177 | const struct gdb_xml_element threads_children[] = { |
| 3178 | { "thread", thread_attributes, thread_children, |
| 3179 | GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, |
| 3180 | start_thread, end_thread }, |
| 3181 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| 3182 | }; |
| 3183 | |
| 3184 | const struct gdb_xml_element threads_elements[] = { |
| 3185 | { "threads", NULL, threads_children, |
| 3186 | GDB_XML_EF_NONE, NULL, NULL }, |
| 3187 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| 3188 | }; |
| 3189 | |
| 3190 | #endif |
| 3191 | |
| 3192 | /* List remote threads using qXfer:threads:read. */ |
| 3193 | |
| 3194 | static int |
| 3195 | remote_get_threads_with_qxfer (struct target_ops *ops, |
| 3196 | struct threads_listing_context *context) |
| 3197 | { |
| 3198 | #if defined(HAVE_LIBEXPAT) |
| 3199 | if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE) |
| 3200 | { |
| 3201 | gdb::unique_xmalloc_ptr<char> xml |
| 3202 | = target_read_stralloc (ops, TARGET_OBJECT_THREADS, NULL); |
| 3203 | |
| 3204 | if (xml != NULL && *xml != '\0') |
| 3205 | { |
| 3206 | gdb_xml_parse_quick (_("threads"), "threads.dtd", |
| 3207 | threads_elements, xml.get (), context); |
| 3208 | } |
| 3209 | |
| 3210 | return 1; |
| 3211 | } |
| 3212 | #endif |
| 3213 | |
| 3214 | return 0; |
| 3215 | } |
| 3216 | |
| 3217 | /* List remote threads using qfThreadInfo/qsThreadInfo. */ |
| 3218 | |
| 3219 | static int |
| 3220 | remote_get_threads_with_qthreadinfo (struct target_ops *ops, |
| 3221 | struct threads_listing_context *context) |
| 3222 | { |
| 3223 | struct remote_state *rs = get_remote_state (); |
| 3224 | |
| 3225 | if (rs->use_threadinfo_query) |
| 3226 | { |
| 3227 | const char *bufp; |
| 3228 | |
| 3229 | putpkt ("qfThreadInfo"); |
| 3230 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 3231 | bufp = rs->buf; |
| 3232 | if (bufp[0] != '\0') /* q packet recognized */ |
| 3233 | { |
| 3234 | while (*bufp++ == 'm') /* reply contains one or more TID */ |
| 3235 | { |
| 3236 | do |
| 3237 | { |
| 3238 | struct thread_item item; |
| 3239 | |
| 3240 | item.ptid = read_ptid (bufp, &bufp); |
| 3241 | item.core = -1; |
| 3242 | item.name = NULL; |
| 3243 | item.extra = NULL; |
| 3244 | item.thread_handle = nullptr; |
| 3245 | |
| 3246 | VEC_safe_push (thread_item_t, context->items, &item); |
| 3247 | } |
| 3248 | while (*bufp++ == ','); /* comma-separated list */ |
| 3249 | putpkt ("qsThreadInfo"); |
| 3250 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 3251 | bufp = rs->buf; |
| 3252 | } |
| 3253 | return 1; |
| 3254 | } |
| 3255 | else |
| 3256 | { |
| 3257 | /* Packet not recognized. */ |
| 3258 | rs->use_threadinfo_query = 0; |
| 3259 | } |
| 3260 | } |
| 3261 | |
| 3262 | return 0; |
| 3263 | } |
| 3264 | |
| 3265 | /* Implement the to_update_thread_list function for the remote |
| 3266 | targets. */ |
| 3267 | |
| 3268 | static void |
| 3269 | remote_update_thread_list (struct target_ops *ops) |
| 3270 | { |
| 3271 | struct threads_listing_context context; |
| 3272 | struct cleanup *old_chain; |
| 3273 | int got_list = 0; |
| 3274 | |
| 3275 | context.items = NULL; |
| 3276 | old_chain = make_cleanup (clear_threads_listing_context, &context); |
| 3277 | |
| 3278 | /* We have a few different mechanisms to fetch the thread list. Try |
| 3279 | them all, starting with the most preferred one first, falling |
| 3280 | back to older methods. */ |
| 3281 | if (remote_get_threads_with_qxfer (ops, &context) |
| 3282 | || remote_get_threads_with_qthreadinfo (ops, &context) |
| 3283 | || remote_get_threads_with_ql (ops, &context)) |
| 3284 | { |
| 3285 | int i; |
| 3286 | struct thread_item *item; |
| 3287 | struct thread_info *tp, *tmp; |
| 3288 | |
| 3289 | got_list = 1; |
| 3290 | |
| 3291 | if (VEC_empty (thread_item_t, context.items) |
| 3292 | && remote_thread_always_alive (ops, inferior_ptid)) |
| 3293 | { |
| 3294 | /* Some targets don't really support threads, but still |
| 3295 | reply an (empty) thread list in response to the thread |
| 3296 | listing packets, instead of replying "packet not |
| 3297 | supported". Exit early so we don't delete the main |
| 3298 | thread. */ |
| 3299 | do_cleanups (old_chain); |
| 3300 | return; |
| 3301 | } |
| 3302 | |
| 3303 | /* CONTEXT now holds the current thread list on the remote |
| 3304 | target end. Delete GDB-side threads no longer found on the |
| 3305 | target. */ |
| 3306 | ALL_THREADS_SAFE (tp, tmp) |
| 3307 | { |
| 3308 | for (i = 0; |
| 3309 | VEC_iterate (thread_item_t, context.items, i, item); |
| 3310 | ++i) |
| 3311 | { |
| 3312 | if (ptid_equal (item->ptid, tp->ptid)) |
| 3313 | break; |
| 3314 | } |
| 3315 | |
| 3316 | if (i == VEC_length (thread_item_t, context.items)) |
| 3317 | { |
| 3318 | /* Not found. */ |
| 3319 | delete_thread (tp->ptid); |
| 3320 | } |
| 3321 | } |
| 3322 | |
| 3323 | /* Remove any unreported fork child threads from CONTEXT so |
| 3324 | that we don't interfere with follow fork, which is where |
| 3325 | creation of such threads is handled. */ |
| 3326 | remove_new_fork_children (&context); |
| 3327 | |
| 3328 | /* And now add threads we don't know about yet to our list. */ |
| 3329 | for (i = 0; |
| 3330 | VEC_iterate (thread_item_t, context.items, i, item); |
| 3331 | ++i) |
| 3332 | { |
| 3333 | if (!ptid_equal (item->ptid, null_ptid)) |
| 3334 | { |
| 3335 | struct private_thread_info *info; |
| 3336 | /* In non-stop mode, we assume new found threads are |
| 3337 | executing until proven otherwise with a stop reply. |
| 3338 | In all-stop, we can only get here if all threads are |
| 3339 | stopped. */ |
| 3340 | int executing = target_is_non_stop_p () ? 1 : 0; |
| 3341 | |
| 3342 | remote_notice_new_inferior (item->ptid, executing); |
| 3343 | |
| 3344 | info = get_private_info_ptid (item->ptid); |
| 3345 | info->core = item->core; |
| 3346 | info->extra = item->extra; |
| 3347 | item->extra = NULL; |
| 3348 | info->name = item->name; |
| 3349 | item->name = NULL; |
| 3350 | info->thread_handle = item->thread_handle; |
| 3351 | item->thread_handle = nullptr; |
| 3352 | } |
| 3353 | } |
| 3354 | } |
| 3355 | |
| 3356 | if (!got_list) |
| 3357 | { |
| 3358 | /* If no thread listing method is supported, then query whether |
| 3359 | each known thread is alive, one by one, with the T packet. |
| 3360 | If the target doesn't support threads at all, then this is a |
| 3361 | no-op. See remote_thread_alive. */ |
| 3362 | prune_threads (); |
| 3363 | } |
| 3364 | |
| 3365 | do_cleanups (old_chain); |
| 3366 | } |
| 3367 | |
| 3368 | /* |
| 3369 | * Collect a descriptive string about the given thread. |
| 3370 | * The target may say anything it wants to about the thread |
| 3371 | * (typically info about its blocked / runnable state, name, etc.). |
| 3372 | * This string will appear in the info threads display. |
| 3373 | * |
| 3374 | * Optional: targets are not required to implement this function. |
| 3375 | */ |
| 3376 | |
| 3377 | static const char * |
| 3378 | remote_threads_extra_info (struct target_ops *self, struct thread_info *tp) |
| 3379 | { |
| 3380 | struct remote_state *rs = get_remote_state (); |
| 3381 | int result; |
| 3382 | int set; |
| 3383 | threadref id; |
| 3384 | struct gdb_ext_thread_info threadinfo; |
| 3385 | static char display_buf[100]; /* arbitrary... */ |
| 3386 | int n = 0; /* position in display_buf */ |
| 3387 | |
| 3388 | if (rs->remote_desc == 0) /* paranoia */ |
| 3389 | internal_error (__FILE__, __LINE__, |
| 3390 | _("remote_threads_extra_info")); |
| 3391 | |
| 3392 | if (ptid_equal (tp->ptid, magic_null_ptid) |
| 3393 | || (ptid_get_pid (tp->ptid) != 0 && ptid_get_lwp (tp->ptid) == 0)) |
| 3394 | /* This is the main thread which was added by GDB. The remote |
| 3395 | server doesn't know about it. */ |
| 3396 | return NULL; |
| 3397 | |
| 3398 | if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE) |
| 3399 | { |
| 3400 | struct thread_info *info = find_thread_ptid (tp->ptid); |
| 3401 | |
| 3402 | if (info && info->priv) |
| 3403 | return info->priv->extra; |
| 3404 | else |
| 3405 | return NULL; |
| 3406 | } |
| 3407 | |
| 3408 | if (rs->use_threadextra_query) |
| 3409 | { |
| 3410 | char *b = rs->buf; |
| 3411 | char *endb = rs->buf + get_remote_packet_size (); |
| 3412 | |
| 3413 | xsnprintf (b, endb - b, "qThreadExtraInfo,"); |
| 3414 | b += strlen (b); |
| 3415 | write_ptid (b, endb, tp->ptid); |
| 3416 | |
| 3417 | putpkt (rs->buf); |
| 3418 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 3419 | if (rs->buf[0] != 0) |
| 3420 | { |
| 3421 | n = std::min (strlen (rs->buf) / 2, sizeof (display_buf)); |
| 3422 | result = hex2bin (rs->buf, (gdb_byte *) display_buf, n); |
| 3423 | display_buf [result] = '\0'; |
| 3424 | return display_buf; |
| 3425 | } |
| 3426 | } |
| 3427 | |
| 3428 | /* If the above query fails, fall back to the old method. */ |
| 3429 | rs->use_threadextra_query = 0; |
| 3430 | set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME |
| 3431 | | TAG_MOREDISPLAY | TAG_DISPLAY; |
| 3432 | int_to_threadref (&id, ptid_get_lwp (tp->ptid)); |
| 3433 | if (remote_get_threadinfo (&id, set, &threadinfo)) |
| 3434 | if (threadinfo.active) |
| 3435 | { |
| 3436 | if (*threadinfo.shortname) |
| 3437 | n += xsnprintf (&display_buf[0], sizeof (display_buf) - n, |
| 3438 | " Name: %s,", threadinfo.shortname); |
| 3439 | if (*threadinfo.display) |
| 3440 | n += xsnprintf (&display_buf[n], sizeof (display_buf) - n, |
| 3441 | " State: %s,", threadinfo.display); |
| 3442 | if (*threadinfo.more_display) |
| 3443 | n += xsnprintf (&display_buf[n], sizeof (display_buf) - n, |
| 3444 | " Priority: %s", threadinfo.more_display); |
| 3445 | |
| 3446 | if (n > 0) |
| 3447 | { |
| 3448 | /* For purely cosmetic reasons, clear up trailing commas. */ |
| 3449 | if (',' == display_buf[n-1]) |
| 3450 | display_buf[n-1] = ' '; |
| 3451 | return display_buf; |
| 3452 | } |
| 3453 | } |
| 3454 | return NULL; |
| 3455 | } |
| 3456 | \f |
| 3457 | |
| 3458 | static int |
| 3459 | remote_static_tracepoint_marker_at (struct target_ops *self, CORE_ADDR addr, |
| 3460 | struct static_tracepoint_marker *marker) |
| 3461 | { |
| 3462 | struct remote_state *rs = get_remote_state (); |
| 3463 | char *p = rs->buf; |
| 3464 | |
| 3465 | xsnprintf (p, get_remote_packet_size (), "qTSTMat:"); |
| 3466 | p += strlen (p); |
| 3467 | p += hexnumstr (p, addr); |
| 3468 | putpkt (rs->buf); |
| 3469 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 3470 | p = rs->buf; |
| 3471 | |
| 3472 | if (*p == 'E') |
| 3473 | error (_("Remote failure reply: %s"), p); |
| 3474 | |
| 3475 | if (*p++ == 'm') |
| 3476 | { |
| 3477 | parse_static_tracepoint_marker_definition (p, NULL, marker); |
| 3478 | return 1; |
| 3479 | } |
| 3480 | |
| 3481 | return 0; |
| 3482 | } |
| 3483 | |
| 3484 | static VEC(static_tracepoint_marker_p) * |
| 3485 | remote_static_tracepoint_markers_by_strid (struct target_ops *self, |
| 3486 | const char *strid) |
| 3487 | { |
| 3488 | struct remote_state *rs = get_remote_state (); |
| 3489 | VEC(static_tracepoint_marker_p) *markers = NULL; |
| 3490 | struct static_tracepoint_marker *marker = NULL; |
| 3491 | struct cleanup *old_chain; |
| 3492 | const char *p; |
| 3493 | |
| 3494 | /* Ask for a first packet of static tracepoint marker |
| 3495 | definition. */ |
| 3496 | putpkt ("qTfSTM"); |
| 3497 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 3498 | p = rs->buf; |
| 3499 | if (*p == 'E') |
| 3500 | error (_("Remote failure reply: %s"), p); |
| 3501 | |
| 3502 | old_chain = make_cleanup (free_current_marker, &marker); |
| 3503 | |
| 3504 | while (*p++ == 'm') |
| 3505 | { |
| 3506 | if (marker == NULL) |
| 3507 | marker = XCNEW (struct static_tracepoint_marker); |
| 3508 | |
| 3509 | do |
| 3510 | { |
| 3511 | parse_static_tracepoint_marker_definition (p, &p, marker); |
| 3512 | |
| 3513 | if (strid == NULL || strcmp (strid, marker->str_id) == 0) |
| 3514 | { |
| 3515 | VEC_safe_push (static_tracepoint_marker_p, |
| 3516 | markers, marker); |
| 3517 | marker = NULL; |
| 3518 | } |
| 3519 | else |
| 3520 | { |
| 3521 | release_static_tracepoint_marker (marker); |
| 3522 | memset (marker, 0, sizeof (*marker)); |
| 3523 | } |
| 3524 | } |
| 3525 | while (*p++ == ','); /* comma-separated list */ |
| 3526 | /* Ask for another packet of static tracepoint definition. */ |
| 3527 | putpkt ("qTsSTM"); |
| 3528 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 3529 | p = rs->buf; |
| 3530 | } |
| 3531 | |
| 3532 | do_cleanups (old_chain); |
| 3533 | return markers; |
| 3534 | } |
| 3535 | |
| 3536 | \f |
| 3537 | /* Implement the to_get_ada_task_ptid function for the remote targets. */ |
| 3538 | |
| 3539 | static ptid_t |
| 3540 | remote_get_ada_task_ptid (struct target_ops *self, long lwp, long thread) |
| 3541 | { |
| 3542 | return ptid_build (ptid_get_pid (inferior_ptid), lwp, 0); |
| 3543 | } |
| 3544 | \f |
| 3545 | |
| 3546 | /* Restart the remote side; this is an extended protocol operation. */ |
| 3547 | |
| 3548 | static void |
| 3549 | extended_remote_restart (void) |
| 3550 | { |
| 3551 | struct remote_state *rs = get_remote_state (); |
| 3552 | |
| 3553 | /* Send the restart command; for reasons I don't understand the |
| 3554 | remote side really expects a number after the "R". */ |
| 3555 | xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0); |
| 3556 | putpkt (rs->buf); |
| 3557 | |
| 3558 | remote_fileio_reset (); |
| 3559 | } |
| 3560 | \f |
| 3561 | /* Clean up connection to a remote debugger. */ |
| 3562 | |
| 3563 | static void |
| 3564 | remote_close (struct target_ops *self) |
| 3565 | { |
| 3566 | struct remote_state *rs = get_remote_state (); |
| 3567 | |
| 3568 | if (rs->remote_desc == NULL) |
| 3569 | return; /* already closed */ |
| 3570 | |
| 3571 | /* Make sure we leave stdin registered in the event loop. */ |
| 3572 | remote_terminal_ours (self); |
| 3573 | |
| 3574 | serial_close (rs->remote_desc); |
| 3575 | rs->remote_desc = NULL; |
| 3576 | |
| 3577 | /* We don't have a connection to the remote stub anymore. Get rid |
| 3578 | of all the inferiors and their threads we were controlling. |
| 3579 | Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame |
| 3580 | will be unable to find the thread corresponding to (pid, 0, 0). */ |
| 3581 | inferior_ptid = null_ptid; |
| 3582 | discard_all_inferiors (); |
| 3583 | |
| 3584 | /* We are closing the remote target, so we should discard |
| 3585 | everything of this target. */ |
| 3586 | discard_pending_stop_replies_in_queue (rs); |
| 3587 | |
| 3588 | if (remote_async_inferior_event_token) |
| 3589 | delete_async_event_handler (&remote_async_inferior_event_token); |
| 3590 | |
| 3591 | remote_notif_state_xfree (rs->notif_state); |
| 3592 | |
| 3593 | trace_reset_local_state (); |
| 3594 | } |
| 3595 | |
| 3596 | /* Query the remote side for the text, data and bss offsets. */ |
| 3597 | |
| 3598 | static void |
| 3599 | get_offsets (void) |
| 3600 | { |
| 3601 | struct remote_state *rs = get_remote_state (); |
| 3602 | char *buf; |
| 3603 | char *ptr; |
| 3604 | int lose, num_segments = 0, do_sections, do_segments; |
| 3605 | CORE_ADDR text_addr, data_addr, bss_addr, segments[2]; |
| 3606 | struct section_offsets *offs; |
| 3607 | struct symfile_segment_data *data; |
| 3608 | |
| 3609 | if (symfile_objfile == NULL) |
| 3610 | return; |
| 3611 | |
| 3612 | putpkt ("qOffsets"); |
| 3613 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 3614 | buf = rs->buf; |
| 3615 | |
| 3616 | if (buf[0] == '\000') |
| 3617 | return; /* Return silently. Stub doesn't support |
| 3618 | this command. */ |
| 3619 | if (buf[0] == 'E') |
| 3620 | { |
| 3621 | warning (_("Remote failure reply: %s"), buf); |
| 3622 | return; |
| 3623 | } |
| 3624 | |
| 3625 | /* Pick up each field in turn. This used to be done with scanf, but |
| 3626 | scanf will make trouble if CORE_ADDR size doesn't match |
| 3627 | conversion directives correctly. The following code will work |
| 3628 | with any size of CORE_ADDR. */ |
| 3629 | text_addr = data_addr = bss_addr = 0; |
| 3630 | ptr = buf; |
| 3631 | lose = 0; |
| 3632 | |
| 3633 | if (startswith (ptr, "Text=")) |
| 3634 | { |
| 3635 | ptr += 5; |
| 3636 | /* Don't use strtol, could lose on big values. */ |
| 3637 | while (*ptr && *ptr != ';') |
| 3638 | text_addr = (text_addr << 4) + fromhex (*ptr++); |
| 3639 | |
| 3640 | if (startswith (ptr, ";Data=")) |
| 3641 | { |
| 3642 | ptr += 6; |
| 3643 | while (*ptr && *ptr != ';') |
| 3644 | data_addr = (data_addr << 4) + fromhex (*ptr++); |
| 3645 | } |
| 3646 | else |
| 3647 | lose = 1; |
| 3648 | |
| 3649 | if (!lose && startswith (ptr, ";Bss=")) |
| 3650 | { |
| 3651 | ptr += 5; |
| 3652 | while (*ptr && *ptr != ';') |
| 3653 | bss_addr = (bss_addr << 4) + fromhex (*ptr++); |
| 3654 | |
| 3655 | if (bss_addr != data_addr) |
| 3656 | warning (_("Target reported unsupported offsets: %s"), buf); |
| 3657 | } |
| 3658 | else |
| 3659 | lose = 1; |
| 3660 | } |
| 3661 | else if (startswith (ptr, "TextSeg=")) |
| 3662 | { |
| 3663 | ptr += 8; |
| 3664 | /* Don't use strtol, could lose on big values. */ |
| 3665 | while (*ptr && *ptr != ';') |
| 3666 | text_addr = (text_addr << 4) + fromhex (*ptr++); |
| 3667 | num_segments = 1; |
| 3668 | |
| 3669 | if (startswith (ptr, ";DataSeg=")) |
| 3670 | { |
| 3671 | ptr += 9; |
| 3672 | while (*ptr && *ptr != ';') |
| 3673 | data_addr = (data_addr << 4) + fromhex (*ptr++); |
| 3674 | num_segments++; |
| 3675 | } |
| 3676 | } |
| 3677 | else |
| 3678 | lose = 1; |
| 3679 | |
| 3680 | if (lose) |
| 3681 | error (_("Malformed response to offset query, %s"), buf); |
| 3682 | else if (*ptr != '\0') |
| 3683 | warning (_("Target reported unsupported offsets: %s"), buf); |
| 3684 | |
| 3685 | offs = ((struct section_offsets *) |
| 3686 | alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections))); |
| 3687 | memcpy (offs, symfile_objfile->section_offsets, |
| 3688 | SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)); |
| 3689 | |
| 3690 | data = get_symfile_segment_data (symfile_objfile->obfd); |
| 3691 | do_segments = (data != NULL); |
| 3692 | do_sections = num_segments == 0; |
| 3693 | |
| 3694 | if (num_segments > 0) |
| 3695 | { |
| 3696 | segments[0] = text_addr; |
| 3697 | segments[1] = data_addr; |
| 3698 | } |
| 3699 | /* If we have two segments, we can still try to relocate everything |
| 3700 | by assuming that the .text and .data offsets apply to the whole |
| 3701 | text and data segments. Convert the offsets given in the packet |
| 3702 | to base addresses for symfile_map_offsets_to_segments. */ |
| 3703 | else if (data && data->num_segments == 2) |
| 3704 | { |
| 3705 | segments[0] = data->segment_bases[0] + text_addr; |
| 3706 | segments[1] = data->segment_bases[1] + data_addr; |
| 3707 | num_segments = 2; |
| 3708 | } |
| 3709 | /* If the object file has only one segment, assume that it is text |
| 3710 | rather than data; main programs with no writable data are rare, |
| 3711 | but programs with no code are useless. Of course the code might |
| 3712 | have ended up in the data segment... to detect that we would need |
| 3713 | the permissions here. */ |
| 3714 | else if (data && data->num_segments == 1) |
| 3715 | { |
| 3716 | segments[0] = data->segment_bases[0] + text_addr; |
| 3717 | num_segments = 1; |
| 3718 | } |
| 3719 | /* There's no way to relocate by segment. */ |
| 3720 | else |
| 3721 | do_segments = 0; |
| 3722 | |
| 3723 | if (do_segments) |
| 3724 | { |
| 3725 | int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data, |
| 3726 | offs, num_segments, segments); |
| 3727 | |
| 3728 | if (ret == 0 && !do_sections) |
| 3729 | error (_("Can not handle qOffsets TextSeg " |
| 3730 | "response with this symbol file")); |
| 3731 | |
| 3732 | if (ret > 0) |
| 3733 | do_sections = 0; |
| 3734 | } |
| 3735 | |
| 3736 | if (data) |
| 3737 | free_symfile_segment_data (data); |
| 3738 | |
| 3739 | if (do_sections) |
| 3740 | { |
| 3741 | offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr; |
| 3742 | |
| 3743 | /* This is a temporary kludge to force data and bss to use the |
| 3744 | same offsets because that's what nlmconv does now. The real |
| 3745 | solution requires changes to the stub and remote.c that I |
| 3746 | don't have time to do right now. */ |
| 3747 | |
| 3748 | offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr; |
| 3749 | offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr; |
| 3750 | } |
| 3751 | |
| 3752 | objfile_relocate (symfile_objfile, offs); |
| 3753 | } |
| 3754 | |
| 3755 | /* Send interrupt_sequence to remote target. */ |
| 3756 | static void |
| 3757 | send_interrupt_sequence (void) |
| 3758 | { |
| 3759 | struct remote_state *rs = get_remote_state (); |
| 3760 | |
| 3761 | if (interrupt_sequence_mode == interrupt_sequence_control_c) |
| 3762 | remote_serial_write ("\x03", 1); |
| 3763 | else if (interrupt_sequence_mode == interrupt_sequence_break) |
| 3764 | serial_send_break (rs->remote_desc); |
| 3765 | else if (interrupt_sequence_mode == interrupt_sequence_break_g) |
| 3766 | { |
| 3767 | serial_send_break (rs->remote_desc); |
| 3768 | remote_serial_write ("g", 1); |
| 3769 | } |
| 3770 | else |
| 3771 | internal_error (__FILE__, __LINE__, |
| 3772 | _("Invalid value for interrupt_sequence_mode: %s."), |
| 3773 | interrupt_sequence_mode); |
| 3774 | } |
| 3775 | |
| 3776 | |
| 3777 | /* If STOP_REPLY is a T stop reply, look for the "thread" register, |
| 3778 | and extract the PTID. Returns NULL_PTID if not found. */ |
| 3779 | |
| 3780 | static ptid_t |
| 3781 | stop_reply_extract_thread (char *stop_reply) |
| 3782 | { |
| 3783 | if (stop_reply[0] == 'T' && strlen (stop_reply) > 3) |
| 3784 | { |
| 3785 | const char *p; |
| 3786 | |
| 3787 | /* Txx r:val ; r:val (...) */ |
| 3788 | p = &stop_reply[3]; |
| 3789 | |
| 3790 | /* Look for "register" named "thread". */ |
| 3791 | while (*p != '\0') |
| 3792 | { |
| 3793 | const char *p1; |
| 3794 | |
| 3795 | p1 = strchr (p, ':'); |
| 3796 | if (p1 == NULL) |
| 3797 | return null_ptid; |
| 3798 | |
| 3799 | if (strncmp (p, "thread", p1 - p) == 0) |
| 3800 | return read_ptid (++p1, &p); |
| 3801 | |
| 3802 | p1 = strchr (p, ';'); |
| 3803 | if (p1 == NULL) |
| 3804 | return null_ptid; |
| 3805 | p1++; |
| 3806 | |
| 3807 | p = p1; |
| 3808 | } |
| 3809 | } |
| 3810 | |
| 3811 | return null_ptid; |
| 3812 | } |
| 3813 | |
| 3814 | /* Determine the remote side's current thread. If we have a stop |
| 3815 | reply handy (in WAIT_STATUS), maybe it's a T stop reply with a |
| 3816 | "thread" register we can extract the current thread from. If not, |
| 3817 | ask the remote which is the current thread with qC. The former |
| 3818 | method avoids a roundtrip. */ |
| 3819 | |
| 3820 | static ptid_t |
| 3821 | get_current_thread (char *wait_status) |
| 3822 | { |
| 3823 | ptid_t ptid = null_ptid; |
| 3824 | |
| 3825 | /* Note we don't use remote_parse_stop_reply as that makes use of |
| 3826 | the target architecture, which we haven't yet fully determined at |
| 3827 | this point. */ |
| 3828 | if (wait_status != NULL) |
| 3829 | ptid = stop_reply_extract_thread (wait_status); |
| 3830 | if (ptid_equal (ptid, null_ptid)) |
| 3831 | ptid = remote_current_thread (inferior_ptid); |
| 3832 | |
| 3833 | return ptid; |
| 3834 | } |
| 3835 | |
| 3836 | /* Query the remote target for which is the current thread/process, |
| 3837 | add it to our tables, and update INFERIOR_PTID. The caller is |
| 3838 | responsible for setting the state such that the remote end is ready |
| 3839 | to return the current thread. |
| 3840 | |
| 3841 | This function is called after handling the '?' or 'vRun' packets, |
| 3842 | whose response is a stop reply from which we can also try |
| 3843 | extracting the thread. If the target doesn't support the explicit |
| 3844 | qC query, we infer the current thread from that stop reply, passed |
| 3845 | in in WAIT_STATUS, which may be NULL. */ |
| 3846 | |
| 3847 | static void |
| 3848 | add_current_inferior_and_thread (char *wait_status) |
| 3849 | { |
| 3850 | struct remote_state *rs = get_remote_state (); |
| 3851 | int fake_pid_p = 0; |
| 3852 | |
| 3853 | inferior_ptid = null_ptid; |
| 3854 | |
| 3855 | /* Now, if we have thread information, update inferior_ptid. */ |
| 3856 | ptid_t curr_ptid = get_current_thread (wait_status); |
| 3857 | |
| 3858 | if (curr_ptid != null_ptid) |
| 3859 | { |
| 3860 | if (!remote_multi_process_p (rs)) |
| 3861 | fake_pid_p = 1; |
| 3862 | } |
| 3863 | else |
| 3864 | { |
| 3865 | /* Without this, some commands which require an active target |
| 3866 | (such as kill) won't work. This variable serves (at least) |
| 3867 | double duty as both the pid of the target process (if it has |
| 3868 | such), and as a flag indicating that a target is active. */ |
| 3869 | curr_ptid = magic_null_ptid; |
| 3870 | fake_pid_p = 1; |
| 3871 | } |
| 3872 | |
| 3873 | remote_add_inferior (fake_pid_p, ptid_get_pid (curr_ptid), -1, 1); |
| 3874 | |
| 3875 | /* Add the main thread and switch to it. Don't try reading |
| 3876 | registers yet, since we haven't fetched the target description |
| 3877 | yet. */ |
| 3878 | thread_info *tp = add_thread_silent (curr_ptid); |
| 3879 | switch_to_thread_no_regs (tp); |
| 3880 | } |
| 3881 | |
| 3882 | /* Print info about a thread that was found already stopped on |
| 3883 | connection. */ |
| 3884 | |
| 3885 | static void |
| 3886 | print_one_stopped_thread (struct thread_info *thread) |
| 3887 | { |
| 3888 | struct target_waitstatus *ws = &thread->suspend.waitstatus; |
| 3889 | |
| 3890 | switch_to_thread (thread->ptid); |
| 3891 | stop_pc = get_frame_pc (get_current_frame ()); |
| 3892 | set_current_sal_from_frame (get_current_frame ()); |
| 3893 | |
| 3894 | thread->suspend.waitstatus_pending_p = 0; |
| 3895 | |
| 3896 | if (ws->kind == TARGET_WAITKIND_STOPPED) |
| 3897 | { |
| 3898 | enum gdb_signal sig = ws->value.sig; |
| 3899 | |
| 3900 | if (signal_print_state (sig)) |
| 3901 | observer_notify_signal_received (sig); |
| 3902 | } |
| 3903 | observer_notify_normal_stop (NULL, 1); |
| 3904 | } |
| 3905 | |
| 3906 | /* Process all initial stop replies the remote side sent in response |
| 3907 | to the ? packet. These indicate threads that were already stopped |
| 3908 | on initial connection. We mark these threads as stopped and print |
| 3909 | their current frame before giving the user the prompt. */ |
| 3910 | |
| 3911 | static void |
| 3912 | process_initial_stop_replies (int from_tty) |
| 3913 | { |
| 3914 | int pending_stop_replies = stop_reply_queue_length (); |
| 3915 | struct inferior *inf; |
| 3916 | struct thread_info *thread; |
| 3917 | struct thread_info *selected = NULL; |
| 3918 | struct thread_info *lowest_stopped = NULL; |
| 3919 | struct thread_info *first = NULL; |
| 3920 | |
| 3921 | /* Consume the initial pending events. */ |
| 3922 | while (pending_stop_replies-- > 0) |
| 3923 | { |
| 3924 | ptid_t waiton_ptid = minus_one_ptid; |
| 3925 | ptid_t event_ptid; |
| 3926 | struct target_waitstatus ws; |
| 3927 | int ignore_event = 0; |
| 3928 | struct thread_info *thread; |
| 3929 | |
| 3930 | memset (&ws, 0, sizeof (ws)); |
| 3931 | event_ptid = target_wait (waiton_ptid, &ws, TARGET_WNOHANG); |
| 3932 | if (remote_debug) |
| 3933 | print_target_wait_results (waiton_ptid, event_ptid, &ws); |
| 3934 | |
| 3935 | switch (ws.kind) |
| 3936 | { |
| 3937 | case TARGET_WAITKIND_IGNORE: |
| 3938 | case TARGET_WAITKIND_NO_RESUMED: |
| 3939 | case TARGET_WAITKIND_SIGNALLED: |
| 3940 | case TARGET_WAITKIND_EXITED: |
| 3941 | /* We shouldn't see these, but if we do, just ignore. */ |
| 3942 | if (remote_debug) |
| 3943 | fprintf_unfiltered (gdb_stdlog, "remote: event ignored\n"); |
| 3944 | ignore_event = 1; |
| 3945 | break; |
| 3946 | |
| 3947 | case TARGET_WAITKIND_EXECD: |
| 3948 | xfree (ws.value.execd_pathname); |
| 3949 | break; |
| 3950 | default: |
| 3951 | break; |
| 3952 | } |
| 3953 | |
| 3954 | if (ignore_event) |
| 3955 | continue; |
| 3956 | |
| 3957 | thread = find_thread_ptid (event_ptid); |
| 3958 | |
| 3959 | if (ws.kind == TARGET_WAITKIND_STOPPED) |
| 3960 | { |
| 3961 | enum gdb_signal sig = ws.value.sig; |
| 3962 | |
| 3963 | /* Stubs traditionally report SIGTRAP as initial signal, |
| 3964 | instead of signal 0. Suppress it. */ |
| 3965 | if (sig == GDB_SIGNAL_TRAP) |
| 3966 | sig = GDB_SIGNAL_0; |
| 3967 | thread->suspend.stop_signal = sig; |
| 3968 | ws.value.sig = sig; |
| 3969 | } |
| 3970 | |
| 3971 | thread->suspend.waitstatus = ws; |
| 3972 | |
| 3973 | if (ws.kind != TARGET_WAITKIND_STOPPED |
| 3974 | || ws.value.sig != GDB_SIGNAL_0) |
| 3975 | thread->suspend.waitstatus_pending_p = 1; |
| 3976 | |
| 3977 | set_executing (event_ptid, 0); |
| 3978 | set_running (event_ptid, 0); |
| 3979 | thread->priv->vcont_resumed = 0; |
| 3980 | } |
| 3981 | |
| 3982 | /* "Notice" the new inferiors before anything related to |
| 3983 | registers/memory. */ |
| 3984 | ALL_INFERIORS (inf) |
| 3985 | { |
| 3986 | if (inf->pid == 0) |
| 3987 | continue; |
| 3988 | |
| 3989 | inf->needs_setup = 1; |
| 3990 | |
| 3991 | if (non_stop) |
| 3992 | { |
| 3993 | thread = any_live_thread_of_process (inf->pid); |
| 3994 | notice_new_inferior (thread->ptid, |
| 3995 | thread->state == THREAD_RUNNING, |
| 3996 | from_tty); |
| 3997 | } |
| 3998 | } |
| 3999 | |
| 4000 | /* If all-stop on top of non-stop, pause all threads. Note this |
| 4001 | records the threads' stop pc, so must be done after "noticing" |
| 4002 | the inferiors. */ |
| 4003 | if (!non_stop) |
| 4004 | { |
| 4005 | stop_all_threads (); |
| 4006 | |
| 4007 | /* If all threads of an inferior were already stopped, we |
| 4008 | haven't setup the inferior yet. */ |
| 4009 | ALL_INFERIORS (inf) |
| 4010 | { |
| 4011 | if (inf->pid == 0) |
| 4012 | continue; |
| 4013 | |
| 4014 | if (inf->needs_setup) |
| 4015 | { |
| 4016 | thread = any_live_thread_of_process (inf->pid); |
| 4017 | switch_to_thread_no_regs (thread); |
| 4018 | setup_inferior (0); |
| 4019 | } |
| 4020 | } |
| 4021 | } |
| 4022 | |
| 4023 | /* Now go over all threads that are stopped, and print their current |
| 4024 | frame. If all-stop, then if there's a signalled thread, pick |
| 4025 | that as current. */ |
| 4026 | ALL_NON_EXITED_THREADS (thread) |
| 4027 | { |
| 4028 | if (first == NULL) |
| 4029 | first = thread; |
| 4030 | |
| 4031 | if (!non_stop) |
| 4032 | set_running (thread->ptid, 0); |
| 4033 | else if (thread->state != THREAD_STOPPED) |
| 4034 | continue; |
| 4035 | |
| 4036 | if (selected == NULL |
| 4037 | && thread->suspend.waitstatus_pending_p) |
| 4038 | selected = thread; |
| 4039 | |
| 4040 | if (lowest_stopped == NULL |
| 4041 | || thread->inf->num < lowest_stopped->inf->num |
| 4042 | || thread->per_inf_num < lowest_stopped->per_inf_num) |
| 4043 | lowest_stopped = thread; |
| 4044 | |
| 4045 | if (non_stop) |
| 4046 | print_one_stopped_thread (thread); |
| 4047 | } |
| 4048 | |
| 4049 | /* In all-stop, we only print the status of one thread, and leave |
| 4050 | others with their status pending. */ |
| 4051 | if (!non_stop) |
| 4052 | { |
| 4053 | thread = selected; |
| 4054 | if (thread == NULL) |
| 4055 | thread = lowest_stopped; |
| 4056 | if (thread == NULL) |
| 4057 | thread = first; |
| 4058 | |
| 4059 | print_one_stopped_thread (thread); |
| 4060 | } |
| 4061 | |
| 4062 | /* For "info program". */ |
| 4063 | thread = inferior_thread (); |
| 4064 | if (thread->state == THREAD_STOPPED) |
| 4065 | set_last_target_status (inferior_ptid, thread->suspend.waitstatus); |
| 4066 | } |
| 4067 | |
| 4068 | /* Start the remote connection and sync state. */ |
| 4069 | |
| 4070 | static void |
| 4071 | remote_start_remote (int from_tty, struct target_ops *target, int extended_p) |
| 4072 | { |
| 4073 | struct remote_state *rs = get_remote_state (); |
| 4074 | struct packet_config *noack_config; |
| 4075 | char *wait_status = NULL; |
| 4076 | |
| 4077 | /* Signal other parts that we're going through the initial setup, |
| 4078 | and so things may not be stable yet. E.g., we don't try to |
| 4079 | install tracepoints until we've relocated symbols. Also, a |
| 4080 | Ctrl-C before we're connected and synced up can't interrupt the |
| 4081 | target. Instead, it offers to drop the (potentially wedged) |
| 4082 | connection. */ |
| 4083 | rs->starting_up = 1; |
| 4084 | |
| 4085 | QUIT; |
| 4086 | |
| 4087 | if (interrupt_on_connect) |
| 4088 | send_interrupt_sequence (); |
| 4089 | |
| 4090 | /* Ack any packet which the remote side has already sent. */ |
| 4091 | remote_serial_write ("+", 1); |
| 4092 | |
| 4093 | /* The first packet we send to the target is the optional "supported |
| 4094 | packets" request. If the target can answer this, it will tell us |
| 4095 | which later probes to skip. */ |
| 4096 | remote_query_supported (); |
| 4097 | |
| 4098 | /* If the stub wants to get a QAllow, compose one and send it. */ |
| 4099 | if (packet_support (PACKET_QAllow) != PACKET_DISABLE) |
| 4100 | remote_set_permissions (target); |
| 4101 | |
| 4102 | /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any |
| 4103 | unknown 'v' packet with string "OK". "OK" gets interpreted by GDB |
| 4104 | as a reply to known packet. For packet "vFile:setfs:" it is an |
| 4105 | invalid reply and GDB would return error in |
| 4106 | remote_hostio_set_filesystem, making remote files access impossible. |
| 4107 | Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as |
| 4108 | other "vFile" packets get correctly detected even on gdbserver < 7.7. */ |
| 4109 | { |
| 4110 | const char v_mustreplyempty[] = "vMustReplyEmpty"; |
| 4111 | |
| 4112 | putpkt (v_mustreplyempty); |
| 4113 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 4114 | if (strcmp (rs->buf, "OK") == 0) |
| 4115 | remote_protocol_packets[PACKET_vFile_setfs].support = PACKET_DISABLE; |
| 4116 | else if (strcmp (rs->buf, "") != 0) |
| 4117 | error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty, |
| 4118 | rs->buf); |
| 4119 | } |
| 4120 | |
| 4121 | /* Next, we possibly activate noack mode. |
| 4122 | |
| 4123 | If the QStartNoAckMode packet configuration is set to AUTO, |
| 4124 | enable noack mode if the stub reported a wish for it with |
| 4125 | qSupported. |
| 4126 | |
| 4127 | If set to TRUE, then enable noack mode even if the stub didn't |
| 4128 | report it in qSupported. If the stub doesn't reply OK, the |
| 4129 | session ends with an error. |
| 4130 | |
| 4131 | If FALSE, then don't activate noack mode, regardless of what the |
| 4132 | stub claimed should be the default with qSupported. */ |
| 4133 | |
| 4134 | noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode]; |
| 4135 | if (packet_config_support (noack_config) != PACKET_DISABLE) |
| 4136 | { |
| 4137 | putpkt ("QStartNoAckMode"); |
| 4138 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 4139 | if (packet_ok (rs->buf, noack_config) == PACKET_OK) |
| 4140 | rs->noack_mode = 1; |
| 4141 | } |
| 4142 | |
| 4143 | if (extended_p) |
| 4144 | { |
| 4145 | /* Tell the remote that we are using the extended protocol. */ |
| 4146 | putpkt ("!"); |
| 4147 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 4148 | } |
| 4149 | |
| 4150 | /* Let the target know which signals it is allowed to pass down to |
| 4151 | the program. */ |
| 4152 | update_signals_program_target (); |
| 4153 | |
| 4154 | /* Next, if the target can specify a description, read it. We do |
| 4155 | this before anything involving memory or registers. */ |
| 4156 | target_find_description (); |
| 4157 | |
| 4158 | /* Next, now that we know something about the target, update the |
| 4159 | address spaces in the program spaces. */ |
| 4160 | update_address_spaces (); |
| 4161 | |
| 4162 | /* On OSs where the list of libraries is global to all |
| 4163 | processes, we fetch them early. */ |
| 4164 | if (gdbarch_has_global_solist (target_gdbarch ())) |
| 4165 | solib_add (NULL, from_tty, auto_solib_add); |
| 4166 | |
| 4167 | if (target_is_non_stop_p ()) |
| 4168 | { |
| 4169 | if (packet_support (PACKET_QNonStop) != PACKET_ENABLE) |
| 4170 | error (_("Non-stop mode requested, but remote " |
| 4171 | "does not support non-stop")); |
| 4172 | |
| 4173 | putpkt ("QNonStop:1"); |
| 4174 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 4175 | |
| 4176 | if (strcmp (rs->buf, "OK") != 0) |
| 4177 | error (_("Remote refused setting non-stop mode with: %s"), rs->buf); |
| 4178 | |
| 4179 | /* Find about threads and processes the stub is already |
| 4180 | controlling. We default to adding them in the running state. |
| 4181 | The '?' query below will then tell us about which threads are |
| 4182 | stopped. */ |
| 4183 | remote_update_thread_list (target); |
| 4184 | } |
| 4185 | else if (packet_support (PACKET_QNonStop) == PACKET_ENABLE) |
| 4186 | { |
| 4187 | /* Don't assume that the stub can operate in all-stop mode. |
| 4188 | Request it explicitly. */ |
| 4189 | putpkt ("QNonStop:0"); |
| 4190 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 4191 | |
| 4192 | if (strcmp (rs->buf, "OK") != 0) |
| 4193 | error (_("Remote refused setting all-stop mode with: %s"), rs->buf); |
| 4194 | } |
| 4195 | |
| 4196 | /* Upload TSVs regardless of whether the target is running or not. The |
| 4197 | remote stub, such as GDBserver, may have some predefined or builtin |
| 4198 | TSVs, even if the target is not running. */ |
| 4199 | if (remote_get_trace_status (target, current_trace_status ()) != -1) |
| 4200 | { |
| 4201 | struct uploaded_tsv *uploaded_tsvs = NULL; |
| 4202 | |
| 4203 | remote_upload_trace_state_variables (target, &uploaded_tsvs); |
| 4204 | merge_uploaded_trace_state_variables (&uploaded_tsvs); |
| 4205 | } |
| 4206 | |
| 4207 | /* Check whether the target is running now. */ |
| 4208 | putpkt ("?"); |
| 4209 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 4210 | |
| 4211 | if (!target_is_non_stop_p ()) |
| 4212 | { |
| 4213 | if (rs->buf[0] == 'W' || rs->buf[0] == 'X') |
| 4214 | { |
| 4215 | if (!extended_p) |
| 4216 | error (_("The target is not running (try extended-remote?)")); |
| 4217 | |
| 4218 | /* We're connected, but not running. Drop out before we |
| 4219 | call start_remote. */ |
| 4220 | rs->starting_up = 0; |
| 4221 | return; |
| 4222 | } |
| 4223 | else |
| 4224 | { |
| 4225 | /* Save the reply for later. */ |
| 4226 | wait_status = (char *) alloca (strlen (rs->buf) + 1); |
| 4227 | strcpy (wait_status, rs->buf); |
| 4228 | } |
| 4229 | |
| 4230 | /* Fetch thread list. */ |
| 4231 | target_update_thread_list (); |
| 4232 | |
| 4233 | /* Let the stub know that we want it to return the thread. */ |
| 4234 | set_continue_thread (minus_one_ptid); |
| 4235 | |
| 4236 | if (thread_count () == 0) |
| 4237 | { |
| 4238 | /* Target has no concept of threads at all. GDB treats |
| 4239 | non-threaded target as single-threaded; add a main |
| 4240 | thread. */ |
| 4241 | add_current_inferior_and_thread (wait_status); |
| 4242 | } |
| 4243 | else |
| 4244 | { |
| 4245 | /* We have thread information; select the thread the target |
| 4246 | says should be current. If we're reconnecting to a |
| 4247 | multi-threaded program, this will ideally be the thread |
| 4248 | that last reported an event before GDB disconnected. */ |
| 4249 | inferior_ptid = get_current_thread (wait_status); |
| 4250 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 4251 | { |
| 4252 | /* Odd... The target was able to list threads, but not |
| 4253 | tell us which thread was current (no "thread" |
| 4254 | register in T stop reply?). Just pick the first |
| 4255 | thread in the thread list then. */ |
| 4256 | |
| 4257 | if (remote_debug) |
| 4258 | fprintf_unfiltered (gdb_stdlog, |
| 4259 | "warning: couldn't determine remote " |
| 4260 | "current thread; picking first in list.\n"); |
| 4261 | |
| 4262 | inferior_ptid = thread_list->ptid; |
| 4263 | } |
| 4264 | } |
| 4265 | |
| 4266 | /* init_wait_for_inferior should be called before get_offsets in order |
| 4267 | to manage `inserted' flag in bp loc in a correct state. |
| 4268 | breakpoint_init_inferior, called from init_wait_for_inferior, set |
| 4269 | `inserted' flag to 0, while before breakpoint_re_set, called from |
| 4270 | start_remote, set `inserted' flag to 1. In the initialization of |
| 4271 | inferior, breakpoint_init_inferior should be called first, and then |
| 4272 | breakpoint_re_set can be called. If this order is broken, state of |
| 4273 | `inserted' flag is wrong, and cause some problems on breakpoint |
| 4274 | manipulation. */ |
| 4275 | init_wait_for_inferior (); |
| 4276 | |
| 4277 | get_offsets (); /* Get text, data & bss offsets. */ |
| 4278 | |
| 4279 | /* If we could not find a description using qXfer, and we know |
| 4280 | how to do it some other way, try again. This is not |
| 4281 | supported for non-stop; it could be, but it is tricky if |
| 4282 | there are no stopped threads when we connect. */ |
| 4283 | if (remote_read_description_p (target) |
| 4284 | && gdbarch_target_desc (target_gdbarch ()) == NULL) |
| 4285 | { |
| 4286 | target_clear_description (); |
| 4287 | target_find_description (); |
| 4288 | } |
| 4289 | |
| 4290 | /* Use the previously fetched status. */ |
| 4291 | gdb_assert (wait_status != NULL); |
| 4292 | strcpy (rs->buf, wait_status); |
| 4293 | rs->cached_wait_status = 1; |
| 4294 | |
| 4295 | start_remote (from_tty); /* Initialize gdb process mechanisms. */ |
| 4296 | } |
| 4297 | else |
| 4298 | { |
| 4299 | /* Clear WFI global state. Do this before finding about new |
| 4300 | threads and inferiors, and setting the current inferior. |
| 4301 | Otherwise we would clear the proceed status of the current |
| 4302 | inferior when we want its stop_soon state to be preserved |
| 4303 | (see notice_new_inferior). */ |
| 4304 | init_wait_for_inferior (); |
| 4305 | |
| 4306 | /* In non-stop, we will either get an "OK", meaning that there |
| 4307 | are no stopped threads at this time; or, a regular stop |
| 4308 | reply. In the latter case, there may be more than one thread |
| 4309 | stopped --- we pull them all out using the vStopped |
| 4310 | mechanism. */ |
| 4311 | if (strcmp (rs->buf, "OK") != 0) |
| 4312 | { |
| 4313 | struct notif_client *notif = ¬if_client_stop; |
| 4314 | |
| 4315 | /* remote_notif_get_pending_replies acks this one, and gets |
| 4316 | the rest out. */ |
| 4317 | rs->notif_state->pending_event[notif_client_stop.id] |
| 4318 | = remote_notif_parse (notif, rs->buf); |
| 4319 | remote_notif_get_pending_events (notif); |
| 4320 | } |
| 4321 | |
| 4322 | if (thread_count () == 0) |
| 4323 | { |
| 4324 | if (!extended_p) |
| 4325 | error (_("The target is not running (try extended-remote?)")); |
| 4326 | |
| 4327 | /* We're connected, but not running. Drop out before we |
| 4328 | call start_remote. */ |
| 4329 | rs->starting_up = 0; |
| 4330 | return; |
| 4331 | } |
| 4332 | |
| 4333 | /* In non-stop mode, any cached wait status will be stored in |
| 4334 | the stop reply queue. */ |
| 4335 | gdb_assert (wait_status == NULL); |
| 4336 | |
| 4337 | /* Report all signals during attach/startup. */ |
| 4338 | remote_pass_signals (target, 0, NULL); |
| 4339 | |
| 4340 | /* If there are already stopped threads, mark them stopped and |
| 4341 | report their stops before giving the prompt to the user. */ |
| 4342 | process_initial_stop_replies (from_tty); |
| 4343 | |
| 4344 | if (target_can_async_p ()) |
| 4345 | target_async (1); |
| 4346 | } |
| 4347 | |
| 4348 | /* If we connected to a live target, do some additional setup. */ |
| 4349 | if (target_has_execution) |
| 4350 | { |
| 4351 | if (symfile_objfile) /* No use without a symbol-file. */ |
| 4352 | remote_check_symbols (); |
| 4353 | } |
| 4354 | |
| 4355 | /* Possibly the target has been engaged in a trace run started |
| 4356 | previously; find out where things are at. */ |
| 4357 | if (remote_get_trace_status (target, current_trace_status ()) != -1) |
| 4358 | { |
| 4359 | struct uploaded_tp *uploaded_tps = NULL; |
| 4360 | |
| 4361 | if (current_trace_status ()->running) |
| 4362 | printf_filtered (_("Trace is already running on the target.\n")); |
| 4363 | |
| 4364 | remote_upload_tracepoints (target, &uploaded_tps); |
| 4365 | |
| 4366 | merge_uploaded_tracepoints (&uploaded_tps); |
| 4367 | } |
| 4368 | |
| 4369 | /* Possibly the target has been engaged in a btrace record started |
| 4370 | previously; find out where things are at. */ |
| 4371 | remote_btrace_maybe_reopen (); |
| 4372 | |
| 4373 | /* The thread and inferior lists are now synchronized with the |
| 4374 | target, our symbols have been relocated, and we're merged the |
| 4375 | target's tracepoints with ours. We're done with basic start |
| 4376 | up. */ |
| 4377 | rs->starting_up = 0; |
| 4378 | |
| 4379 | /* Maybe breakpoints are global and need to be inserted now. */ |
| 4380 | if (breakpoints_should_be_inserted_now ()) |
| 4381 | insert_breakpoints (); |
| 4382 | } |
| 4383 | |
| 4384 | /* Open a connection to a remote debugger. |
| 4385 | NAME is the filename used for communication. */ |
| 4386 | |
| 4387 | static void |
| 4388 | remote_open (const char *name, int from_tty) |
| 4389 | { |
| 4390 | remote_open_1 (name, from_tty, &remote_ops, 0); |
| 4391 | } |
| 4392 | |
| 4393 | /* Open a connection to a remote debugger using the extended |
| 4394 | remote gdb protocol. NAME is the filename used for communication. */ |
| 4395 | |
| 4396 | static void |
| 4397 | extended_remote_open (const char *name, int from_tty) |
| 4398 | { |
| 4399 | remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */); |
| 4400 | } |
| 4401 | |
| 4402 | /* Reset all packets back to "unknown support". Called when opening a |
| 4403 | new connection to a remote target. */ |
| 4404 | |
| 4405 | static void |
| 4406 | reset_all_packet_configs_support (void) |
| 4407 | { |
| 4408 | int i; |
| 4409 | |
| 4410 | for (i = 0; i < PACKET_MAX; i++) |
| 4411 | remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN; |
| 4412 | } |
| 4413 | |
| 4414 | /* Initialize all packet configs. */ |
| 4415 | |
| 4416 | static void |
| 4417 | init_all_packet_configs (void) |
| 4418 | { |
| 4419 | int i; |
| 4420 | |
| 4421 | for (i = 0; i < PACKET_MAX; i++) |
| 4422 | { |
| 4423 | remote_protocol_packets[i].detect = AUTO_BOOLEAN_AUTO; |
| 4424 | remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN; |
| 4425 | } |
| 4426 | } |
| 4427 | |
| 4428 | /* Symbol look-up. */ |
| 4429 | |
| 4430 | static void |
| 4431 | remote_check_symbols (void) |
| 4432 | { |
| 4433 | struct remote_state *rs = get_remote_state (); |
| 4434 | char *msg, *reply, *tmp; |
| 4435 | int end; |
| 4436 | long reply_size; |
| 4437 | struct cleanup *old_chain; |
| 4438 | |
| 4439 | /* The remote side has no concept of inferiors that aren't running |
| 4440 | yet, it only knows about running processes. If we're connected |
| 4441 | but our current inferior is not running, we should not invite the |
| 4442 | remote target to request symbol lookups related to its |
| 4443 | (unrelated) current process. */ |
| 4444 | if (!target_has_execution) |
| 4445 | return; |
| 4446 | |
| 4447 | if (packet_support (PACKET_qSymbol) == PACKET_DISABLE) |
| 4448 | return; |
| 4449 | |
| 4450 | /* Make sure the remote is pointing at the right process. Note |
| 4451 | there's no way to select "no process". */ |
| 4452 | set_general_process (); |
| 4453 | |
| 4454 | /* Allocate a message buffer. We can't reuse the input buffer in RS, |
| 4455 | because we need both at the same time. */ |
| 4456 | msg = (char *) xmalloc (get_remote_packet_size ()); |
| 4457 | old_chain = make_cleanup (xfree, msg); |
| 4458 | reply = (char *) xmalloc (get_remote_packet_size ()); |
| 4459 | make_cleanup (free_current_contents, &reply); |
| 4460 | reply_size = get_remote_packet_size (); |
| 4461 | |
| 4462 | /* Invite target to request symbol lookups. */ |
| 4463 | |
| 4464 | putpkt ("qSymbol::"); |
| 4465 | getpkt (&reply, &reply_size, 0); |
| 4466 | packet_ok (reply, &remote_protocol_packets[PACKET_qSymbol]); |
| 4467 | |
| 4468 | while (startswith (reply, "qSymbol:")) |
| 4469 | { |
| 4470 | struct bound_minimal_symbol sym; |
| 4471 | |
| 4472 | tmp = &reply[8]; |
| 4473 | end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2); |
| 4474 | msg[end] = '\0'; |
| 4475 | sym = lookup_minimal_symbol (msg, NULL, NULL); |
| 4476 | if (sym.minsym == NULL) |
| 4477 | xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]); |
| 4478 | else |
| 4479 | { |
| 4480 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
| 4481 | CORE_ADDR sym_addr = BMSYMBOL_VALUE_ADDRESS (sym); |
| 4482 | |
| 4483 | /* If this is a function address, return the start of code |
| 4484 | instead of any data function descriptor. */ |
| 4485 | sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch (), |
| 4486 | sym_addr, |
| 4487 | ¤t_target); |
| 4488 | |
| 4489 | xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s", |
| 4490 | phex_nz (sym_addr, addr_size), &reply[8]); |
| 4491 | } |
| 4492 | |
| 4493 | putpkt (msg); |
| 4494 | getpkt (&reply, &reply_size, 0); |
| 4495 | } |
| 4496 | |
| 4497 | do_cleanups (old_chain); |
| 4498 | } |
| 4499 | |
| 4500 | static struct serial * |
| 4501 | remote_serial_open (const char *name) |
| 4502 | { |
| 4503 | static int udp_warning = 0; |
| 4504 | |
| 4505 | /* FIXME: Parsing NAME here is a hack. But we want to warn here instead |
| 4506 | of in ser-tcp.c, because it is the remote protocol assuming that the |
| 4507 | serial connection is reliable and not the serial connection promising |
| 4508 | to be. */ |
| 4509 | if (!udp_warning && startswith (name, "udp:")) |
| 4510 | { |
| 4511 | warning (_("The remote protocol may be unreliable over UDP.\n" |
| 4512 | "Some events may be lost, rendering further debugging " |
| 4513 | "impossible.")); |
| 4514 | udp_warning = 1; |
| 4515 | } |
| 4516 | |
| 4517 | return serial_open (name); |
| 4518 | } |
| 4519 | |
| 4520 | /* Inform the target of our permission settings. The permission flags |
| 4521 | work without this, but if the target knows the settings, it can do |
| 4522 | a couple things. First, it can add its own check, to catch cases |
| 4523 | that somehow manage to get by the permissions checks in target |
| 4524 | methods. Second, if the target is wired to disallow particular |
| 4525 | settings (for instance, a system in the field that is not set up to |
| 4526 | be able to stop at a breakpoint), it can object to any unavailable |
| 4527 | permissions. */ |
| 4528 | |
| 4529 | void |
| 4530 | remote_set_permissions (struct target_ops *self) |
| 4531 | { |
| 4532 | struct remote_state *rs = get_remote_state (); |
| 4533 | |
| 4534 | xsnprintf (rs->buf, get_remote_packet_size (), "QAllow:" |
| 4535 | "WriteReg:%x;WriteMem:%x;" |
| 4536 | "InsertBreak:%x;InsertTrace:%x;" |
| 4537 | "InsertFastTrace:%x;Stop:%x", |
| 4538 | may_write_registers, may_write_memory, |
| 4539 | may_insert_breakpoints, may_insert_tracepoints, |
| 4540 | may_insert_fast_tracepoints, may_stop); |
| 4541 | putpkt (rs->buf); |
| 4542 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 4543 | |
| 4544 | /* If the target didn't like the packet, warn the user. Do not try |
| 4545 | to undo the user's settings, that would just be maddening. */ |
| 4546 | if (strcmp (rs->buf, "OK") != 0) |
| 4547 | warning (_("Remote refused setting permissions with: %s"), rs->buf); |
| 4548 | } |
| 4549 | |
| 4550 | /* This type describes each known response to the qSupported |
| 4551 | packet. */ |
| 4552 | struct protocol_feature |
| 4553 | { |
| 4554 | /* The name of this protocol feature. */ |
| 4555 | const char *name; |
| 4556 | |
| 4557 | /* The default for this protocol feature. */ |
| 4558 | enum packet_support default_support; |
| 4559 | |
| 4560 | /* The function to call when this feature is reported, or after |
| 4561 | qSupported processing if the feature is not supported. |
| 4562 | The first argument points to this structure. The second |
| 4563 | argument indicates whether the packet requested support be |
| 4564 | enabled, disabled, or probed (or the default, if this function |
| 4565 | is being called at the end of processing and this feature was |
| 4566 | not reported). The third argument may be NULL; if not NULL, it |
| 4567 | is a NUL-terminated string taken from the packet following |
| 4568 | this feature's name and an equals sign. */ |
| 4569 | void (*func) (const struct protocol_feature *, enum packet_support, |
| 4570 | const char *); |
| 4571 | |
| 4572 | /* The corresponding packet for this feature. Only used if |
| 4573 | FUNC is remote_supported_packet. */ |
| 4574 | int packet; |
| 4575 | }; |
| 4576 | |
| 4577 | static void |
| 4578 | remote_supported_packet (const struct protocol_feature *feature, |
| 4579 | enum packet_support support, |
| 4580 | const char *argument) |
| 4581 | { |
| 4582 | if (argument) |
| 4583 | { |
| 4584 | warning (_("Remote qSupported response supplied an unexpected value for" |
| 4585 | " \"%s\"."), feature->name); |
| 4586 | return; |
| 4587 | } |
| 4588 | |
| 4589 | remote_protocol_packets[feature->packet].support = support; |
| 4590 | } |
| 4591 | |
| 4592 | static void |
| 4593 | remote_packet_size (const struct protocol_feature *feature, |
| 4594 | enum packet_support support, const char *value) |
| 4595 | { |
| 4596 | struct remote_state *rs = get_remote_state (); |
| 4597 | |
| 4598 | int packet_size; |
| 4599 | char *value_end; |
| 4600 | |
| 4601 | if (support != PACKET_ENABLE) |
| 4602 | return; |
| 4603 | |
| 4604 | if (value == NULL || *value == '\0') |
| 4605 | { |
| 4606 | warning (_("Remote target reported \"%s\" without a size."), |
| 4607 | feature->name); |
| 4608 | return; |
| 4609 | } |
| 4610 | |
| 4611 | errno = 0; |
| 4612 | packet_size = strtol (value, &value_end, 16); |
| 4613 | if (errno != 0 || *value_end != '\0' || packet_size < 0) |
| 4614 | { |
| 4615 | warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."), |
| 4616 | feature->name, value); |
| 4617 | return; |
| 4618 | } |
| 4619 | |
| 4620 | /* Record the new maximum packet size. */ |
| 4621 | rs->explicit_packet_size = packet_size; |
| 4622 | } |
| 4623 | |
| 4624 | static const struct protocol_feature remote_protocol_features[] = { |
| 4625 | { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 }, |
| 4626 | { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet, |
| 4627 | PACKET_qXfer_auxv }, |
| 4628 | { "qXfer:exec-file:read", PACKET_DISABLE, remote_supported_packet, |
| 4629 | PACKET_qXfer_exec_file }, |
| 4630 | { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet, |
| 4631 | PACKET_qXfer_features }, |
| 4632 | { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet, |
| 4633 | PACKET_qXfer_libraries }, |
| 4634 | { "qXfer:libraries-svr4:read", PACKET_DISABLE, remote_supported_packet, |
| 4635 | PACKET_qXfer_libraries_svr4 }, |
| 4636 | { "augmented-libraries-svr4-read", PACKET_DISABLE, |
| 4637 | remote_supported_packet, PACKET_augmented_libraries_svr4_read_feature }, |
| 4638 | { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet, |
| 4639 | PACKET_qXfer_memory_map }, |
| 4640 | { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet, |
| 4641 | PACKET_qXfer_spu_read }, |
| 4642 | { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet, |
| 4643 | PACKET_qXfer_spu_write }, |
| 4644 | { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet, |
| 4645 | PACKET_qXfer_osdata }, |
| 4646 | { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet, |
| 4647 | PACKET_qXfer_threads }, |
| 4648 | { "qXfer:traceframe-info:read", PACKET_DISABLE, remote_supported_packet, |
| 4649 | PACKET_qXfer_traceframe_info }, |
| 4650 | { "QPassSignals", PACKET_DISABLE, remote_supported_packet, |
| 4651 | PACKET_QPassSignals }, |
| 4652 | { "QCatchSyscalls", PACKET_DISABLE, remote_supported_packet, |
| 4653 | PACKET_QCatchSyscalls }, |
| 4654 | { "QProgramSignals", PACKET_DISABLE, remote_supported_packet, |
| 4655 | PACKET_QProgramSignals }, |
| 4656 | { "QSetWorkingDir", PACKET_DISABLE, remote_supported_packet, |
| 4657 | PACKET_QSetWorkingDir }, |
| 4658 | { "QStartupWithShell", PACKET_DISABLE, remote_supported_packet, |
| 4659 | PACKET_QStartupWithShell }, |
| 4660 | { "QEnvironmentHexEncoded", PACKET_DISABLE, remote_supported_packet, |
| 4661 | PACKET_QEnvironmentHexEncoded }, |
| 4662 | { "QEnvironmentReset", PACKET_DISABLE, remote_supported_packet, |
| 4663 | PACKET_QEnvironmentReset }, |
| 4664 | { "QEnvironmentUnset", PACKET_DISABLE, remote_supported_packet, |
| 4665 | PACKET_QEnvironmentUnset }, |
| 4666 | { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet, |
| 4667 | PACKET_QStartNoAckMode }, |
| 4668 | { "multiprocess", PACKET_DISABLE, remote_supported_packet, |
| 4669 | PACKET_multiprocess_feature }, |
| 4670 | { "QNonStop", PACKET_DISABLE, remote_supported_packet, PACKET_QNonStop }, |
| 4671 | { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet, |
| 4672 | PACKET_qXfer_siginfo_read }, |
| 4673 | { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet, |
| 4674 | PACKET_qXfer_siginfo_write }, |
| 4675 | { "ConditionalTracepoints", PACKET_DISABLE, remote_supported_packet, |
| 4676 | PACKET_ConditionalTracepoints }, |
| 4677 | { "ConditionalBreakpoints", PACKET_DISABLE, remote_supported_packet, |
| 4678 | PACKET_ConditionalBreakpoints }, |
| 4679 | { "BreakpointCommands", PACKET_DISABLE, remote_supported_packet, |
| 4680 | PACKET_BreakpointCommands }, |
| 4681 | { "FastTracepoints", PACKET_DISABLE, remote_supported_packet, |
| 4682 | PACKET_FastTracepoints }, |
| 4683 | { "StaticTracepoints", PACKET_DISABLE, remote_supported_packet, |
| 4684 | PACKET_StaticTracepoints }, |
| 4685 | {"InstallInTrace", PACKET_DISABLE, remote_supported_packet, |
| 4686 | PACKET_InstallInTrace}, |
| 4687 | { "DisconnectedTracing", PACKET_DISABLE, remote_supported_packet, |
| 4688 | PACKET_DisconnectedTracing_feature }, |
| 4689 | { "ReverseContinue", PACKET_DISABLE, remote_supported_packet, |
| 4690 | PACKET_bc }, |
| 4691 | { "ReverseStep", PACKET_DISABLE, remote_supported_packet, |
| 4692 | PACKET_bs }, |
| 4693 | { "TracepointSource", PACKET_DISABLE, remote_supported_packet, |
| 4694 | PACKET_TracepointSource }, |
| 4695 | { "QAllow", PACKET_DISABLE, remote_supported_packet, |
| 4696 | PACKET_QAllow }, |
| 4697 | { "EnableDisableTracepoints", PACKET_DISABLE, remote_supported_packet, |
| 4698 | PACKET_EnableDisableTracepoints_feature }, |
| 4699 | { "qXfer:fdpic:read", PACKET_DISABLE, remote_supported_packet, |
| 4700 | PACKET_qXfer_fdpic }, |
| 4701 | { "qXfer:uib:read", PACKET_DISABLE, remote_supported_packet, |
| 4702 | PACKET_qXfer_uib }, |
| 4703 | { "QDisableRandomization", PACKET_DISABLE, remote_supported_packet, |
| 4704 | PACKET_QDisableRandomization }, |
| 4705 | { "QAgent", PACKET_DISABLE, remote_supported_packet, PACKET_QAgent}, |
| 4706 | { "QTBuffer:size", PACKET_DISABLE, |
| 4707 | remote_supported_packet, PACKET_QTBuffer_size}, |
| 4708 | { "tracenz", PACKET_DISABLE, remote_supported_packet, PACKET_tracenz_feature }, |
| 4709 | { "Qbtrace:off", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_off }, |
| 4710 | { "Qbtrace:bts", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_bts }, |
| 4711 | { "Qbtrace:pt", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_pt }, |
| 4712 | { "qXfer:btrace:read", PACKET_DISABLE, remote_supported_packet, |
| 4713 | PACKET_qXfer_btrace }, |
| 4714 | { "qXfer:btrace-conf:read", PACKET_DISABLE, remote_supported_packet, |
| 4715 | PACKET_qXfer_btrace_conf }, |
| 4716 | { "Qbtrace-conf:bts:size", PACKET_DISABLE, remote_supported_packet, |
| 4717 | PACKET_Qbtrace_conf_bts_size }, |
| 4718 | { "swbreak", PACKET_DISABLE, remote_supported_packet, PACKET_swbreak_feature }, |
| 4719 | { "hwbreak", PACKET_DISABLE, remote_supported_packet, PACKET_hwbreak_feature }, |
| 4720 | { "fork-events", PACKET_DISABLE, remote_supported_packet, |
| 4721 | PACKET_fork_event_feature }, |
| 4722 | { "vfork-events", PACKET_DISABLE, remote_supported_packet, |
| 4723 | PACKET_vfork_event_feature }, |
| 4724 | { "exec-events", PACKET_DISABLE, remote_supported_packet, |
| 4725 | PACKET_exec_event_feature }, |
| 4726 | { "Qbtrace-conf:pt:size", PACKET_DISABLE, remote_supported_packet, |
| 4727 | PACKET_Qbtrace_conf_pt_size }, |
| 4728 | { "vContSupported", PACKET_DISABLE, remote_supported_packet, PACKET_vContSupported }, |
| 4729 | { "QThreadEvents", PACKET_DISABLE, remote_supported_packet, PACKET_QThreadEvents }, |
| 4730 | { "no-resumed", PACKET_DISABLE, remote_supported_packet, PACKET_no_resumed }, |
| 4731 | }; |
| 4732 | |
| 4733 | static char *remote_support_xml; |
| 4734 | |
| 4735 | /* Register string appended to "xmlRegisters=" in qSupported query. */ |
| 4736 | |
| 4737 | void |
| 4738 | register_remote_support_xml (const char *xml) |
| 4739 | { |
| 4740 | #if defined(HAVE_LIBEXPAT) |
| 4741 | if (remote_support_xml == NULL) |
| 4742 | remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL); |
| 4743 | else |
| 4744 | { |
| 4745 | char *copy = xstrdup (remote_support_xml + 13); |
| 4746 | char *p = strtok (copy, ","); |
| 4747 | |
| 4748 | do |
| 4749 | { |
| 4750 | if (strcmp (p, xml) == 0) |
| 4751 | { |
| 4752 | /* already there */ |
| 4753 | xfree (copy); |
| 4754 | return; |
| 4755 | } |
| 4756 | } |
| 4757 | while ((p = strtok (NULL, ",")) != NULL); |
| 4758 | xfree (copy); |
| 4759 | |
| 4760 | remote_support_xml = reconcat (remote_support_xml, |
| 4761 | remote_support_xml, ",", xml, |
| 4762 | (char *) NULL); |
| 4763 | } |
| 4764 | #endif |
| 4765 | } |
| 4766 | |
| 4767 | static char * |
| 4768 | remote_query_supported_append (char *msg, const char *append) |
| 4769 | { |
| 4770 | if (msg) |
| 4771 | return reconcat (msg, msg, ";", append, (char *) NULL); |
| 4772 | else |
| 4773 | return xstrdup (append); |
| 4774 | } |
| 4775 | |
| 4776 | static void |
| 4777 | remote_query_supported (void) |
| 4778 | { |
| 4779 | struct remote_state *rs = get_remote_state (); |
| 4780 | char *next; |
| 4781 | int i; |
| 4782 | unsigned char seen [ARRAY_SIZE (remote_protocol_features)]; |
| 4783 | |
| 4784 | /* The packet support flags are handled differently for this packet |
| 4785 | than for most others. We treat an error, a disabled packet, and |
| 4786 | an empty response identically: any features which must be reported |
| 4787 | to be used will be automatically disabled. An empty buffer |
| 4788 | accomplishes this, since that is also the representation for a list |
| 4789 | containing no features. */ |
| 4790 | |
| 4791 | rs->buf[0] = 0; |
| 4792 | if (packet_support (PACKET_qSupported) != PACKET_DISABLE) |
| 4793 | { |
| 4794 | char *q = NULL; |
| 4795 | struct cleanup *old_chain = make_cleanup (free_current_contents, &q); |
| 4796 | |
| 4797 | if (packet_set_cmd_state (PACKET_multiprocess_feature) != AUTO_BOOLEAN_FALSE) |
| 4798 | q = remote_query_supported_append (q, "multiprocess+"); |
| 4799 | |
| 4800 | if (packet_set_cmd_state (PACKET_swbreak_feature) != AUTO_BOOLEAN_FALSE) |
| 4801 | q = remote_query_supported_append (q, "swbreak+"); |
| 4802 | if (packet_set_cmd_state (PACKET_hwbreak_feature) != AUTO_BOOLEAN_FALSE) |
| 4803 | q = remote_query_supported_append (q, "hwbreak+"); |
| 4804 | |
| 4805 | q = remote_query_supported_append (q, "qRelocInsn+"); |
| 4806 | |
| 4807 | if (packet_set_cmd_state (PACKET_fork_event_feature) |
| 4808 | != AUTO_BOOLEAN_FALSE) |
| 4809 | q = remote_query_supported_append (q, "fork-events+"); |
| 4810 | if (packet_set_cmd_state (PACKET_vfork_event_feature) |
| 4811 | != AUTO_BOOLEAN_FALSE) |
| 4812 | q = remote_query_supported_append (q, "vfork-events+"); |
| 4813 | if (packet_set_cmd_state (PACKET_exec_event_feature) |
| 4814 | != AUTO_BOOLEAN_FALSE) |
| 4815 | q = remote_query_supported_append (q, "exec-events+"); |
| 4816 | |
| 4817 | if (packet_set_cmd_state (PACKET_vContSupported) != AUTO_BOOLEAN_FALSE) |
| 4818 | q = remote_query_supported_append (q, "vContSupported+"); |
| 4819 | |
| 4820 | if (packet_set_cmd_state (PACKET_QThreadEvents) != AUTO_BOOLEAN_FALSE) |
| 4821 | q = remote_query_supported_append (q, "QThreadEvents+"); |
| 4822 | |
| 4823 | if (packet_set_cmd_state (PACKET_no_resumed) != AUTO_BOOLEAN_FALSE) |
| 4824 | q = remote_query_supported_append (q, "no-resumed+"); |
| 4825 | |
| 4826 | /* Keep this one last to work around a gdbserver <= 7.10 bug in |
| 4827 | the qSupported:xmlRegisters=i386 handling. */ |
| 4828 | if (remote_support_xml != NULL) |
| 4829 | q = remote_query_supported_append (q, remote_support_xml); |
| 4830 | |
| 4831 | q = reconcat (q, "qSupported:", q, (char *) NULL); |
| 4832 | putpkt (q); |
| 4833 | |
| 4834 | do_cleanups (old_chain); |
| 4835 | |
| 4836 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 4837 | |
| 4838 | /* If an error occured, warn, but do not return - just reset the |
| 4839 | buffer to empty and go on to disable features. */ |
| 4840 | if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported]) |
| 4841 | == PACKET_ERROR) |
| 4842 | { |
| 4843 | warning (_("Remote failure reply: %s"), rs->buf); |
| 4844 | rs->buf[0] = 0; |
| 4845 | } |
| 4846 | } |
| 4847 | |
| 4848 | memset (seen, 0, sizeof (seen)); |
| 4849 | |
| 4850 | next = rs->buf; |
| 4851 | while (*next) |
| 4852 | { |
| 4853 | enum packet_support is_supported; |
| 4854 | char *p, *end, *name_end, *value; |
| 4855 | |
| 4856 | /* First separate out this item from the rest of the packet. If |
| 4857 | there's another item after this, we overwrite the separator |
| 4858 | (terminated strings are much easier to work with). */ |
| 4859 | p = next; |
| 4860 | end = strchr (p, ';'); |
| 4861 | if (end == NULL) |
| 4862 | { |
| 4863 | end = p + strlen (p); |
| 4864 | next = end; |
| 4865 | } |
| 4866 | else |
| 4867 | { |
| 4868 | *end = '\0'; |
| 4869 | next = end + 1; |
| 4870 | |
| 4871 | if (end == p) |
| 4872 | { |
| 4873 | warning (_("empty item in \"qSupported\" response")); |
| 4874 | continue; |
| 4875 | } |
| 4876 | } |
| 4877 | |
| 4878 | name_end = strchr (p, '='); |
| 4879 | if (name_end) |
| 4880 | { |
| 4881 | /* This is a name=value entry. */ |
| 4882 | is_supported = PACKET_ENABLE; |
| 4883 | value = name_end + 1; |
| 4884 | *name_end = '\0'; |
| 4885 | } |
| 4886 | else |
| 4887 | { |
| 4888 | value = NULL; |
| 4889 | switch (end[-1]) |
| 4890 | { |
| 4891 | case '+': |
| 4892 | is_supported = PACKET_ENABLE; |
| 4893 | break; |
| 4894 | |
| 4895 | case '-': |
| 4896 | is_supported = PACKET_DISABLE; |
| 4897 | break; |
| 4898 | |
| 4899 | case '?': |
| 4900 | is_supported = PACKET_SUPPORT_UNKNOWN; |
| 4901 | break; |
| 4902 | |
| 4903 | default: |
| 4904 | warning (_("unrecognized item \"%s\" " |
| 4905 | "in \"qSupported\" response"), p); |
| 4906 | continue; |
| 4907 | } |
| 4908 | end[-1] = '\0'; |
| 4909 | } |
| 4910 | |
| 4911 | for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++) |
| 4912 | if (strcmp (remote_protocol_features[i].name, p) == 0) |
| 4913 | { |
| 4914 | const struct protocol_feature *feature; |
| 4915 | |
| 4916 | seen[i] = 1; |
| 4917 | feature = &remote_protocol_features[i]; |
| 4918 | feature->func (feature, is_supported, value); |
| 4919 | break; |
| 4920 | } |
| 4921 | } |
| 4922 | |
| 4923 | /* If we increased the packet size, make sure to increase the global |
| 4924 | buffer size also. We delay this until after parsing the entire |
| 4925 | qSupported packet, because this is the same buffer we were |
| 4926 | parsing. */ |
| 4927 | if (rs->buf_size < rs->explicit_packet_size) |
| 4928 | { |
| 4929 | rs->buf_size = rs->explicit_packet_size; |
| 4930 | rs->buf = (char *) xrealloc (rs->buf, rs->buf_size); |
| 4931 | } |
| 4932 | |
| 4933 | /* Handle the defaults for unmentioned features. */ |
| 4934 | for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++) |
| 4935 | if (!seen[i]) |
| 4936 | { |
| 4937 | const struct protocol_feature *feature; |
| 4938 | |
| 4939 | feature = &remote_protocol_features[i]; |
| 4940 | feature->func (feature, feature->default_support, NULL); |
| 4941 | } |
| 4942 | } |
| 4943 | |
| 4944 | /* Serial QUIT handler for the remote serial descriptor. |
| 4945 | |
| 4946 | Defers handling a Ctrl-C until we're done with the current |
| 4947 | command/response packet sequence, unless: |
| 4948 | |
| 4949 | - We're setting up the connection. Don't send a remote interrupt |
| 4950 | request, as we're not fully synced yet. Quit immediately |
| 4951 | instead. |
| 4952 | |
| 4953 | - The target has been resumed in the foreground |
| 4954 | (target_terminal::is_ours is false) with a synchronous resume |
| 4955 | packet, and we're blocked waiting for the stop reply, thus a |
| 4956 | Ctrl-C should be immediately sent to the target. |
| 4957 | |
| 4958 | - We get a second Ctrl-C while still within the same serial read or |
| 4959 | write. In that case the serial is seemingly wedged --- offer to |
| 4960 | quit/disconnect. |
| 4961 | |
| 4962 | - We see a second Ctrl-C without target response, after having |
| 4963 | previously interrupted the target. In that case the target/stub |
| 4964 | is probably wedged --- offer to quit/disconnect. |
| 4965 | */ |
| 4966 | |
| 4967 | static void |
| 4968 | remote_serial_quit_handler (void) |
| 4969 | { |
| 4970 | struct remote_state *rs = get_remote_state (); |
| 4971 | |
| 4972 | if (check_quit_flag ()) |
| 4973 | { |
| 4974 | /* If we're starting up, we're not fully synced yet. Quit |
| 4975 | immediately. */ |
| 4976 | if (rs->starting_up) |
| 4977 | quit (); |
| 4978 | else if (rs->got_ctrlc_during_io) |
| 4979 | { |
| 4980 | if (query (_("The target is not responding to GDB commands.\n" |
| 4981 | "Stop debugging it? "))) |
| 4982 | remote_unpush_and_throw (); |
| 4983 | } |
| 4984 | /* If ^C has already been sent once, offer to disconnect. */ |
| 4985 | else if (!target_terminal::is_ours () && rs->ctrlc_pending_p) |
| 4986 | interrupt_query (); |
| 4987 | /* All-stop protocol, and blocked waiting for stop reply. Send |
| 4988 | an interrupt request. */ |
| 4989 | else if (!target_terminal::is_ours () && rs->waiting_for_stop_reply) |
| 4990 | target_interrupt (inferior_ptid); |
| 4991 | else |
| 4992 | rs->got_ctrlc_during_io = 1; |
| 4993 | } |
| 4994 | } |
| 4995 | |
| 4996 | /* Remove any of the remote.c targets from target stack. Upper targets depend |
| 4997 | on it so remove them first. */ |
| 4998 | |
| 4999 | static void |
| 5000 | remote_unpush_target (void) |
| 5001 | { |
| 5002 | pop_all_targets_at_and_above (process_stratum); |
| 5003 | } |
| 5004 | |
| 5005 | static void |
| 5006 | remote_unpush_and_throw (void) |
| 5007 | { |
| 5008 | remote_unpush_target (); |
| 5009 | throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target.")); |
| 5010 | } |
| 5011 | |
| 5012 | static void |
| 5013 | remote_open_1 (const char *name, int from_tty, |
| 5014 | struct target_ops *target, int extended_p) |
| 5015 | { |
| 5016 | struct remote_state *rs = get_remote_state (); |
| 5017 | |
| 5018 | if (name == 0) |
| 5019 | error (_("To open a remote debug connection, you need to specify what\n" |
| 5020 | "serial device is attached to the remote system\n" |
| 5021 | "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).")); |
| 5022 | |
| 5023 | /* See FIXME above. */ |
| 5024 | if (!target_async_permitted) |
| 5025 | wait_forever_enabled_p = 1; |
| 5026 | |
| 5027 | /* If we're connected to a running target, target_preopen will kill it. |
| 5028 | Ask this question first, before target_preopen has a chance to kill |
| 5029 | anything. */ |
| 5030 | if (rs->remote_desc != NULL && !have_inferiors ()) |
| 5031 | { |
| 5032 | if (from_tty |
| 5033 | && !query (_("Already connected to a remote target. Disconnect? "))) |
| 5034 | error (_("Still connected.")); |
| 5035 | } |
| 5036 | |
| 5037 | /* Here the possibly existing remote target gets unpushed. */ |
| 5038 | target_preopen (from_tty); |
| 5039 | |
| 5040 | /* Make sure we send the passed signals list the next time we resume. */ |
| 5041 | xfree (rs->last_pass_packet); |
| 5042 | rs->last_pass_packet = NULL; |
| 5043 | |
| 5044 | /* Make sure we send the program signals list the next time we |
| 5045 | resume. */ |
| 5046 | xfree (rs->last_program_signals_packet); |
| 5047 | rs->last_program_signals_packet = NULL; |
| 5048 | |
| 5049 | remote_fileio_reset (); |
| 5050 | reopen_exec_file (); |
| 5051 | reread_symbols (); |
| 5052 | |
| 5053 | rs->remote_desc = remote_serial_open (name); |
| 5054 | if (!rs->remote_desc) |
| 5055 | perror_with_name (name); |
| 5056 | |
| 5057 | if (baud_rate != -1) |
| 5058 | { |
| 5059 | if (serial_setbaudrate (rs->remote_desc, baud_rate)) |
| 5060 | { |
| 5061 | /* The requested speed could not be set. Error out to |
| 5062 | top level after closing remote_desc. Take care to |
| 5063 | set remote_desc to NULL to avoid closing remote_desc |
| 5064 | more than once. */ |
| 5065 | serial_close (rs->remote_desc); |
| 5066 | rs->remote_desc = NULL; |
| 5067 | perror_with_name (name); |
| 5068 | } |
| 5069 | } |
| 5070 | |
| 5071 | serial_setparity (rs->remote_desc, serial_parity); |
| 5072 | serial_raw (rs->remote_desc); |
| 5073 | |
| 5074 | /* If there is something sitting in the buffer we might take it as a |
| 5075 | response to a command, which would be bad. */ |
| 5076 | serial_flush_input (rs->remote_desc); |
| 5077 | |
| 5078 | if (from_tty) |
| 5079 | { |
| 5080 | puts_filtered ("Remote debugging using "); |
| 5081 | puts_filtered (name); |
| 5082 | puts_filtered ("\n"); |
| 5083 | } |
| 5084 | push_target (target); /* Switch to using remote target now. */ |
| 5085 | |
| 5086 | /* Register extra event sources in the event loop. */ |
| 5087 | remote_async_inferior_event_token |
| 5088 | = create_async_event_handler (remote_async_inferior_event_handler, |
| 5089 | NULL); |
| 5090 | rs->notif_state = remote_notif_state_allocate (); |
| 5091 | |
| 5092 | /* Reset the target state; these things will be queried either by |
| 5093 | remote_query_supported or as they are needed. */ |
| 5094 | reset_all_packet_configs_support (); |
| 5095 | rs->cached_wait_status = 0; |
| 5096 | rs->explicit_packet_size = 0; |
| 5097 | rs->noack_mode = 0; |
| 5098 | rs->extended = extended_p; |
| 5099 | rs->waiting_for_stop_reply = 0; |
| 5100 | rs->ctrlc_pending_p = 0; |
| 5101 | rs->got_ctrlc_during_io = 0; |
| 5102 | |
| 5103 | rs->general_thread = not_sent_ptid; |
| 5104 | rs->continue_thread = not_sent_ptid; |
| 5105 | rs->remote_traceframe_number = -1; |
| 5106 | |
| 5107 | rs->last_resume_exec_dir = EXEC_FORWARD; |
| 5108 | |
| 5109 | /* Probe for ability to use "ThreadInfo" query, as required. */ |
| 5110 | rs->use_threadinfo_query = 1; |
| 5111 | rs->use_threadextra_query = 1; |
| 5112 | |
| 5113 | readahead_cache_invalidate (); |
| 5114 | |
| 5115 | if (target_async_permitted) |
| 5116 | { |
| 5117 | /* FIXME: cagney/1999-09-23: During the initial connection it is |
| 5118 | assumed that the target is already ready and able to respond to |
| 5119 | requests. Unfortunately remote_start_remote() eventually calls |
| 5120 | wait_for_inferior() with no timeout. wait_forever_enabled_p gets |
| 5121 | around this. Eventually a mechanism that allows |
| 5122 | wait_for_inferior() to expect/get timeouts will be |
| 5123 | implemented. */ |
| 5124 | wait_forever_enabled_p = 0; |
| 5125 | } |
| 5126 | |
| 5127 | /* First delete any symbols previously loaded from shared libraries. */ |
| 5128 | no_shared_libraries (NULL, 0); |
| 5129 | |
| 5130 | /* Start afresh. */ |
| 5131 | init_thread_list (); |
| 5132 | |
| 5133 | /* Start the remote connection. If error() or QUIT, discard this |
| 5134 | target (we'd otherwise be in an inconsistent state) and then |
| 5135 | propogate the error on up the exception chain. This ensures that |
| 5136 | the caller doesn't stumble along blindly assuming that the |
| 5137 | function succeeded. The CLI doesn't have this problem but other |
| 5138 | UI's, such as MI do. |
| 5139 | |
| 5140 | FIXME: cagney/2002-05-19: Instead of re-throwing the exception, |
| 5141 | this function should return an error indication letting the |
| 5142 | caller restore the previous state. Unfortunately the command |
| 5143 | ``target remote'' is directly wired to this function making that |
| 5144 | impossible. On a positive note, the CLI side of this problem has |
| 5145 | been fixed - the function set_cmd_context() makes it possible for |
| 5146 | all the ``target ....'' commands to share a common callback |
| 5147 | function. See cli-dump.c. */ |
| 5148 | { |
| 5149 | |
| 5150 | TRY |
| 5151 | { |
| 5152 | remote_start_remote (from_tty, target, extended_p); |
| 5153 | } |
| 5154 | CATCH (ex, RETURN_MASK_ALL) |
| 5155 | { |
| 5156 | /* Pop the partially set up target - unless something else did |
| 5157 | already before throwing the exception. */ |
| 5158 | if (rs->remote_desc != NULL) |
| 5159 | remote_unpush_target (); |
| 5160 | if (target_async_permitted) |
| 5161 | wait_forever_enabled_p = 1; |
| 5162 | throw_exception (ex); |
| 5163 | } |
| 5164 | END_CATCH |
| 5165 | } |
| 5166 | |
| 5167 | remote_btrace_reset (); |
| 5168 | |
| 5169 | if (target_async_permitted) |
| 5170 | wait_forever_enabled_p = 1; |
| 5171 | } |
| 5172 | |
| 5173 | /* Detach the specified process. */ |
| 5174 | |
| 5175 | static void |
| 5176 | remote_detach_pid (int pid) |
| 5177 | { |
| 5178 | struct remote_state *rs = get_remote_state (); |
| 5179 | |
| 5180 | if (remote_multi_process_p (rs)) |
| 5181 | xsnprintf (rs->buf, get_remote_packet_size (), "D;%x", pid); |
| 5182 | else |
| 5183 | strcpy (rs->buf, "D"); |
| 5184 | |
| 5185 | putpkt (rs->buf); |
| 5186 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 5187 | |
| 5188 | if (rs->buf[0] == 'O' && rs->buf[1] == 'K') |
| 5189 | ; |
| 5190 | else if (rs->buf[0] == '\0') |
| 5191 | error (_("Remote doesn't know how to detach")); |
| 5192 | else |
| 5193 | error (_("Can't detach process.")); |
| 5194 | } |
| 5195 | |
| 5196 | /* This detaches a program to which we previously attached, using |
| 5197 | inferior_ptid to identify the process. After this is done, GDB |
| 5198 | can be used to debug some other program. We better not have left |
| 5199 | any breakpoints in the target program or it'll die when it hits |
| 5200 | one. */ |
| 5201 | |
| 5202 | static void |
| 5203 | remote_detach_1 (const char *args, int from_tty) |
| 5204 | { |
| 5205 | int pid = ptid_get_pid (inferior_ptid); |
| 5206 | struct remote_state *rs = get_remote_state (); |
| 5207 | struct thread_info *tp = find_thread_ptid (inferior_ptid); |
| 5208 | int is_fork_parent; |
| 5209 | |
| 5210 | if (args) |
| 5211 | error (_("Argument given to \"detach\" when remotely debugging.")); |
| 5212 | |
| 5213 | if (!target_has_execution) |
| 5214 | error (_("No process to detach from.")); |
| 5215 | |
| 5216 | target_announce_detach (from_tty); |
| 5217 | |
| 5218 | /* Tell the remote target to detach. */ |
| 5219 | remote_detach_pid (pid); |
| 5220 | |
| 5221 | /* Exit only if this is the only active inferior. */ |
| 5222 | if (from_tty && !rs->extended && number_of_live_inferiors () == 1) |
| 5223 | puts_filtered (_("Ending remote debugging.\n")); |
| 5224 | |
| 5225 | /* Check to see if we are detaching a fork parent. Note that if we |
| 5226 | are detaching a fork child, tp == NULL. */ |
| 5227 | is_fork_parent = (tp != NULL |
| 5228 | && tp->pending_follow.kind == TARGET_WAITKIND_FORKED); |
| 5229 | |
| 5230 | /* If doing detach-on-fork, we don't mourn, because that will delete |
| 5231 | breakpoints that should be available for the followed inferior. */ |
| 5232 | if (!is_fork_parent) |
| 5233 | target_mourn_inferior (inferior_ptid); |
| 5234 | else |
| 5235 | { |
| 5236 | inferior_ptid = null_ptid; |
| 5237 | detach_inferior (pid); |
| 5238 | } |
| 5239 | } |
| 5240 | |
| 5241 | static void |
| 5242 | remote_detach (struct target_ops *ops, const char *args, int from_tty) |
| 5243 | { |
| 5244 | remote_detach_1 (args, from_tty); |
| 5245 | } |
| 5246 | |
| 5247 | static void |
| 5248 | extended_remote_detach (struct target_ops *ops, const char *args, int from_tty) |
| 5249 | { |
| 5250 | remote_detach_1 (args, from_tty); |
| 5251 | } |
| 5252 | |
| 5253 | /* Target follow-fork function for remote targets. On entry, and |
| 5254 | at return, the current inferior is the fork parent. |
| 5255 | |
| 5256 | Note that although this is currently only used for extended-remote, |
| 5257 | it is named remote_follow_fork in anticipation of using it for the |
| 5258 | remote target as well. */ |
| 5259 | |
| 5260 | static int |
| 5261 | remote_follow_fork (struct target_ops *ops, int follow_child, |
| 5262 | int detach_fork) |
| 5263 | { |
| 5264 | struct remote_state *rs = get_remote_state (); |
| 5265 | enum target_waitkind kind = inferior_thread ()->pending_follow.kind; |
| 5266 | |
| 5267 | if ((kind == TARGET_WAITKIND_FORKED && remote_fork_event_p (rs)) |
| 5268 | || (kind == TARGET_WAITKIND_VFORKED && remote_vfork_event_p (rs))) |
| 5269 | { |
| 5270 | /* When following the parent and detaching the child, we detach |
| 5271 | the child here. For the case of following the child and |
| 5272 | detaching the parent, the detach is done in the target- |
| 5273 | independent follow fork code in infrun.c. We can't use |
| 5274 | target_detach when detaching an unfollowed child because |
| 5275 | the client side doesn't know anything about the child. */ |
| 5276 | if (detach_fork && !follow_child) |
| 5277 | { |
| 5278 | /* Detach the fork child. */ |
| 5279 | ptid_t child_ptid; |
| 5280 | pid_t child_pid; |
| 5281 | |
| 5282 | child_ptid = inferior_thread ()->pending_follow.value.related_pid; |
| 5283 | child_pid = ptid_get_pid (child_ptid); |
| 5284 | |
| 5285 | remote_detach_pid (child_pid); |
| 5286 | detach_inferior (child_pid); |
| 5287 | } |
| 5288 | } |
| 5289 | return 0; |
| 5290 | } |
| 5291 | |
| 5292 | /* Target follow-exec function for remote targets. Save EXECD_PATHNAME |
| 5293 | in the program space of the new inferior. On entry and at return the |
| 5294 | current inferior is the exec'ing inferior. INF is the new exec'd |
| 5295 | inferior, which may be the same as the exec'ing inferior unless |
| 5296 | follow-exec-mode is "new". */ |
| 5297 | |
| 5298 | static void |
| 5299 | remote_follow_exec (struct target_ops *ops, |
| 5300 | struct inferior *inf, char *execd_pathname) |
| 5301 | { |
| 5302 | /* We know that this is a target file name, so if it has the "target:" |
| 5303 | prefix we strip it off before saving it in the program space. */ |
| 5304 | if (is_target_filename (execd_pathname)) |
| 5305 | execd_pathname += strlen (TARGET_SYSROOT_PREFIX); |
| 5306 | |
| 5307 | set_pspace_remote_exec_file (inf->pspace, execd_pathname); |
| 5308 | } |
| 5309 | |
| 5310 | /* Same as remote_detach, but don't send the "D" packet; just disconnect. */ |
| 5311 | |
| 5312 | static void |
| 5313 | remote_disconnect (struct target_ops *target, const char *args, int from_tty) |
| 5314 | { |
| 5315 | if (args) |
| 5316 | error (_("Argument given to \"disconnect\" when remotely debugging.")); |
| 5317 | |
| 5318 | /* Make sure we unpush even the extended remote targets. Calling |
| 5319 | target_mourn_inferior won't unpush, and remote_mourn won't |
| 5320 | unpush if there is more than one inferior left. */ |
| 5321 | unpush_target (target); |
| 5322 | generic_mourn_inferior (); |
| 5323 | |
| 5324 | if (from_tty) |
| 5325 | puts_filtered ("Ending remote debugging.\n"); |
| 5326 | } |
| 5327 | |
| 5328 | /* Attach to the process specified by ARGS. If FROM_TTY is non-zero, |
| 5329 | be chatty about it. */ |
| 5330 | |
| 5331 | static void |
| 5332 | extended_remote_attach (struct target_ops *target, const char *args, |
| 5333 | int from_tty) |
| 5334 | { |
| 5335 | struct remote_state *rs = get_remote_state (); |
| 5336 | int pid; |
| 5337 | char *wait_status = NULL; |
| 5338 | |
| 5339 | pid = parse_pid_to_attach (args); |
| 5340 | |
| 5341 | /* Remote PID can be freely equal to getpid, do not check it here the same |
| 5342 | way as in other targets. */ |
| 5343 | |
| 5344 | if (packet_support (PACKET_vAttach) == PACKET_DISABLE) |
| 5345 | error (_("This target does not support attaching to a process")); |
| 5346 | |
| 5347 | if (from_tty) |
| 5348 | { |
| 5349 | char *exec_file = get_exec_file (0); |
| 5350 | |
| 5351 | if (exec_file) |
| 5352 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, |
| 5353 | target_pid_to_str (pid_to_ptid (pid))); |
| 5354 | else |
| 5355 | printf_unfiltered (_("Attaching to %s\n"), |
| 5356 | target_pid_to_str (pid_to_ptid (pid))); |
| 5357 | |
| 5358 | gdb_flush (gdb_stdout); |
| 5359 | } |
| 5360 | |
| 5361 | xsnprintf (rs->buf, get_remote_packet_size (), "vAttach;%x", pid); |
| 5362 | putpkt (rs->buf); |
| 5363 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 5364 | |
| 5365 | switch (packet_ok (rs->buf, |
| 5366 | &remote_protocol_packets[PACKET_vAttach])) |
| 5367 | { |
| 5368 | case PACKET_OK: |
| 5369 | if (!target_is_non_stop_p ()) |
| 5370 | { |
| 5371 | /* Save the reply for later. */ |
| 5372 | wait_status = (char *) alloca (strlen (rs->buf) + 1); |
| 5373 | strcpy (wait_status, rs->buf); |
| 5374 | } |
| 5375 | else if (strcmp (rs->buf, "OK") != 0) |
| 5376 | error (_("Attaching to %s failed with: %s"), |
| 5377 | target_pid_to_str (pid_to_ptid (pid)), |
| 5378 | rs->buf); |
| 5379 | break; |
| 5380 | case PACKET_UNKNOWN: |
| 5381 | error (_("This target does not support attaching to a process")); |
| 5382 | default: |
| 5383 | error (_("Attaching to %s failed"), |
| 5384 | target_pid_to_str (pid_to_ptid (pid))); |
| 5385 | } |
| 5386 | |
| 5387 | set_current_inferior (remote_add_inferior (0, pid, 1, 0)); |
| 5388 | |
| 5389 | inferior_ptid = pid_to_ptid (pid); |
| 5390 | |
| 5391 | if (target_is_non_stop_p ()) |
| 5392 | { |
| 5393 | struct thread_info *thread; |
| 5394 | |
| 5395 | /* Get list of threads. */ |
| 5396 | remote_update_thread_list (target); |
| 5397 | |
| 5398 | thread = first_thread_of_process (pid); |
| 5399 | if (thread) |
| 5400 | inferior_ptid = thread->ptid; |
| 5401 | else |
| 5402 | inferior_ptid = pid_to_ptid (pid); |
| 5403 | |
| 5404 | /* Invalidate our notion of the remote current thread. */ |
| 5405 | record_currthread (rs, minus_one_ptid); |
| 5406 | } |
| 5407 | else |
| 5408 | { |
| 5409 | /* Now, if we have thread information, update inferior_ptid. */ |
| 5410 | inferior_ptid = remote_current_thread (inferior_ptid); |
| 5411 | |
| 5412 | /* Add the main thread to the thread list. */ |
| 5413 | add_thread_silent (inferior_ptid); |
| 5414 | } |
| 5415 | |
| 5416 | /* Next, if the target can specify a description, read it. We do |
| 5417 | this before anything involving memory or registers. */ |
| 5418 | target_find_description (); |
| 5419 | |
| 5420 | if (!target_is_non_stop_p ()) |
| 5421 | { |
| 5422 | /* Use the previously fetched status. */ |
| 5423 | gdb_assert (wait_status != NULL); |
| 5424 | |
| 5425 | if (target_can_async_p ()) |
| 5426 | { |
| 5427 | struct notif_event *reply |
| 5428 | = remote_notif_parse (¬if_client_stop, wait_status); |
| 5429 | |
| 5430 | push_stop_reply ((struct stop_reply *) reply); |
| 5431 | |
| 5432 | target_async (1); |
| 5433 | } |
| 5434 | else |
| 5435 | { |
| 5436 | gdb_assert (wait_status != NULL); |
| 5437 | strcpy (rs->buf, wait_status); |
| 5438 | rs->cached_wait_status = 1; |
| 5439 | } |
| 5440 | } |
| 5441 | else |
| 5442 | gdb_assert (wait_status == NULL); |
| 5443 | } |
| 5444 | |
| 5445 | /* Implementation of the to_post_attach method. */ |
| 5446 | |
| 5447 | static void |
| 5448 | extended_remote_post_attach (struct target_ops *ops, int pid) |
| 5449 | { |
| 5450 | /* Get text, data & bss offsets. */ |
| 5451 | get_offsets (); |
| 5452 | |
| 5453 | /* In certain cases GDB might not have had the chance to start |
| 5454 | symbol lookup up until now. This could happen if the debugged |
| 5455 | binary is not using shared libraries, the vsyscall page is not |
| 5456 | present (on Linux) and the binary itself hadn't changed since the |
| 5457 | debugging process was started. */ |
| 5458 | if (symfile_objfile != NULL) |
| 5459 | remote_check_symbols(); |
| 5460 | } |
| 5461 | |
| 5462 | \f |
| 5463 | /* Check for the availability of vCont. This function should also check |
| 5464 | the response. */ |
| 5465 | |
| 5466 | static void |
| 5467 | remote_vcont_probe (struct remote_state *rs) |
| 5468 | { |
| 5469 | char *buf; |
| 5470 | |
| 5471 | strcpy (rs->buf, "vCont?"); |
| 5472 | putpkt (rs->buf); |
| 5473 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 5474 | buf = rs->buf; |
| 5475 | |
| 5476 | /* Make sure that the features we assume are supported. */ |
| 5477 | if (startswith (buf, "vCont")) |
| 5478 | { |
| 5479 | char *p = &buf[5]; |
| 5480 | int support_c, support_C; |
| 5481 | |
| 5482 | rs->supports_vCont.s = 0; |
| 5483 | rs->supports_vCont.S = 0; |
| 5484 | support_c = 0; |
| 5485 | support_C = 0; |
| 5486 | rs->supports_vCont.t = 0; |
| 5487 | rs->supports_vCont.r = 0; |
| 5488 | while (p && *p == ';') |
| 5489 | { |
| 5490 | p++; |
| 5491 | if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| 5492 | rs->supports_vCont.s = 1; |
| 5493 | else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| 5494 | rs->supports_vCont.S = 1; |
| 5495 | else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| 5496 | support_c = 1; |
| 5497 | else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| 5498 | support_C = 1; |
| 5499 | else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| 5500 | rs->supports_vCont.t = 1; |
| 5501 | else if (*p == 'r' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| 5502 | rs->supports_vCont.r = 1; |
| 5503 | |
| 5504 | p = strchr (p, ';'); |
| 5505 | } |
| 5506 | |
| 5507 | /* If c, and C are not all supported, we can't use vCont. Clearing |
| 5508 | BUF will make packet_ok disable the packet. */ |
| 5509 | if (!support_c || !support_C) |
| 5510 | buf[0] = 0; |
| 5511 | } |
| 5512 | |
| 5513 | packet_ok (buf, &remote_protocol_packets[PACKET_vCont]); |
| 5514 | } |
| 5515 | |
| 5516 | /* Helper function for building "vCont" resumptions. Write a |
| 5517 | resumption to P. ENDP points to one-passed-the-end of the buffer |
| 5518 | we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The |
| 5519 | thread to be resumed is PTID; STEP and SIGGNAL indicate whether the |
| 5520 | resumed thread should be single-stepped and/or signalled. If PTID |
| 5521 | equals minus_one_ptid, then all threads are resumed; if PTID |
| 5522 | represents a process, then all threads of the process are resumed; |
| 5523 | the thread to be stepped and/or signalled is given in the global |
| 5524 | INFERIOR_PTID. */ |
| 5525 | |
| 5526 | static char * |
| 5527 | append_resumption (char *p, char *endp, |
| 5528 | ptid_t ptid, int step, enum gdb_signal siggnal) |
| 5529 | { |
| 5530 | struct remote_state *rs = get_remote_state (); |
| 5531 | |
| 5532 | if (step && siggnal != GDB_SIGNAL_0) |
| 5533 | p += xsnprintf (p, endp - p, ";S%02x", siggnal); |
| 5534 | else if (step |
| 5535 | /* GDB is willing to range step. */ |
| 5536 | && use_range_stepping |
| 5537 | /* Target supports range stepping. */ |
| 5538 | && rs->supports_vCont.r |
| 5539 | /* We don't currently support range stepping multiple |
| 5540 | threads with a wildcard (though the protocol allows it, |
| 5541 | so stubs shouldn't make an active effort to forbid |
| 5542 | it). */ |
| 5543 | && !(remote_multi_process_p (rs) && ptid_is_pid (ptid))) |
| 5544 | { |
| 5545 | struct thread_info *tp; |
| 5546 | |
| 5547 | if (ptid_equal (ptid, minus_one_ptid)) |
| 5548 | { |
| 5549 | /* If we don't know about the target thread's tid, then |
| 5550 | we're resuming magic_null_ptid (see caller). */ |
| 5551 | tp = find_thread_ptid (magic_null_ptid); |
| 5552 | } |
| 5553 | else |
| 5554 | tp = find_thread_ptid (ptid); |
| 5555 | gdb_assert (tp != NULL); |
| 5556 | |
| 5557 | if (tp->control.may_range_step) |
| 5558 | { |
| 5559 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
| 5560 | |
| 5561 | p += xsnprintf (p, endp - p, ";r%s,%s", |
| 5562 | phex_nz (tp->control.step_range_start, |
| 5563 | addr_size), |
| 5564 | phex_nz (tp->control.step_range_end, |
| 5565 | addr_size)); |
| 5566 | } |
| 5567 | else |
| 5568 | p += xsnprintf (p, endp - p, ";s"); |
| 5569 | } |
| 5570 | else if (step) |
| 5571 | p += xsnprintf (p, endp - p, ";s"); |
| 5572 | else if (siggnal != GDB_SIGNAL_0) |
| 5573 | p += xsnprintf (p, endp - p, ";C%02x", siggnal); |
| 5574 | else |
| 5575 | p += xsnprintf (p, endp - p, ";c"); |
| 5576 | |
| 5577 | if (remote_multi_process_p (rs) && ptid_is_pid (ptid)) |
| 5578 | { |
| 5579 | ptid_t nptid; |
| 5580 | |
| 5581 | /* All (-1) threads of process. */ |
| 5582 | nptid = ptid_build (ptid_get_pid (ptid), -1, 0); |
| 5583 | |
| 5584 | p += xsnprintf (p, endp - p, ":"); |
| 5585 | p = write_ptid (p, endp, nptid); |
| 5586 | } |
| 5587 | else if (!ptid_equal (ptid, minus_one_ptid)) |
| 5588 | { |
| 5589 | p += xsnprintf (p, endp - p, ":"); |
| 5590 | p = write_ptid (p, endp, ptid); |
| 5591 | } |
| 5592 | |
| 5593 | return p; |
| 5594 | } |
| 5595 | |
| 5596 | /* Clear the thread's private info on resume. */ |
| 5597 | |
| 5598 | static void |
| 5599 | resume_clear_thread_private_info (struct thread_info *thread) |
| 5600 | { |
| 5601 | if (thread->priv != NULL) |
| 5602 | { |
| 5603 | thread->priv->stop_reason = TARGET_STOPPED_BY_NO_REASON; |
| 5604 | thread->priv->watch_data_address = 0; |
| 5605 | } |
| 5606 | } |
| 5607 | |
| 5608 | /* Append a vCont continue-with-signal action for threads that have a |
| 5609 | non-zero stop signal. */ |
| 5610 | |
| 5611 | static char * |
| 5612 | append_pending_thread_resumptions (char *p, char *endp, ptid_t ptid) |
| 5613 | { |
| 5614 | struct thread_info *thread; |
| 5615 | |
| 5616 | ALL_NON_EXITED_THREADS (thread) |
| 5617 | if (ptid_match (thread->ptid, ptid) |
| 5618 | && !ptid_equal (inferior_ptid, thread->ptid) |
| 5619 | && thread->suspend.stop_signal != GDB_SIGNAL_0) |
| 5620 | { |
| 5621 | p = append_resumption (p, endp, thread->ptid, |
| 5622 | 0, thread->suspend.stop_signal); |
| 5623 | thread->suspend.stop_signal = GDB_SIGNAL_0; |
| 5624 | resume_clear_thread_private_info (thread); |
| 5625 | } |
| 5626 | |
| 5627 | return p; |
| 5628 | } |
| 5629 | |
| 5630 | /* Set the target running, using the packets that use Hc |
| 5631 | (c/s/C/S). */ |
| 5632 | |
| 5633 | static void |
| 5634 | remote_resume_with_hc (struct target_ops *ops, |
| 5635 | ptid_t ptid, int step, enum gdb_signal siggnal) |
| 5636 | { |
| 5637 | struct remote_state *rs = get_remote_state (); |
| 5638 | struct thread_info *thread; |
| 5639 | char *buf; |
| 5640 | |
| 5641 | rs->last_sent_signal = siggnal; |
| 5642 | rs->last_sent_step = step; |
| 5643 | |
| 5644 | /* The c/s/C/S resume packets use Hc, so set the continue |
| 5645 | thread. */ |
| 5646 | if (ptid_equal (ptid, minus_one_ptid)) |
| 5647 | set_continue_thread (any_thread_ptid); |
| 5648 | else |
| 5649 | set_continue_thread (ptid); |
| 5650 | |
| 5651 | ALL_NON_EXITED_THREADS (thread) |
| 5652 | resume_clear_thread_private_info (thread); |
| 5653 | |
| 5654 | buf = rs->buf; |
| 5655 | if (execution_direction == EXEC_REVERSE) |
| 5656 | { |
| 5657 | /* We don't pass signals to the target in reverse exec mode. */ |
| 5658 | if (info_verbose && siggnal != GDB_SIGNAL_0) |
| 5659 | warning (_(" - Can't pass signal %d to target in reverse: ignored."), |
| 5660 | siggnal); |
| 5661 | |
| 5662 | if (step && packet_support (PACKET_bs) == PACKET_DISABLE) |
| 5663 | error (_("Remote reverse-step not supported.")); |
| 5664 | if (!step && packet_support (PACKET_bc) == PACKET_DISABLE) |
| 5665 | error (_("Remote reverse-continue not supported.")); |
| 5666 | |
| 5667 | strcpy (buf, step ? "bs" : "bc"); |
| 5668 | } |
| 5669 | else if (siggnal != GDB_SIGNAL_0) |
| 5670 | { |
| 5671 | buf[0] = step ? 'S' : 'C'; |
| 5672 | buf[1] = tohex (((int) siggnal >> 4) & 0xf); |
| 5673 | buf[2] = tohex (((int) siggnal) & 0xf); |
| 5674 | buf[3] = '\0'; |
| 5675 | } |
| 5676 | else |
| 5677 | strcpy (buf, step ? "s" : "c"); |
| 5678 | |
| 5679 | putpkt (buf); |
| 5680 | } |
| 5681 | |
| 5682 | /* Resume the remote inferior by using a "vCont" packet. The thread |
| 5683 | to be resumed is PTID; STEP and SIGGNAL indicate whether the |
| 5684 | resumed thread should be single-stepped and/or signalled. If PTID |
| 5685 | equals minus_one_ptid, then all threads are resumed; the thread to |
| 5686 | be stepped and/or signalled is given in the global INFERIOR_PTID. |
| 5687 | This function returns non-zero iff it resumes the inferior. |
| 5688 | |
| 5689 | This function issues a strict subset of all possible vCont commands |
| 5690 | at the moment. */ |
| 5691 | |
| 5692 | static int |
| 5693 | remote_resume_with_vcont (ptid_t ptid, int step, enum gdb_signal siggnal) |
| 5694 | { |
| 5695 | struct remote_state *rs = get_remote_state (); |
| 5696 | char *p; |
| 5697 | char *endp; |
| 5698 | |
| 5699 | /* No reverse execution actions defined for vCont. */ |
| 5700 | if (execution_direction == EXEC_REVERSE) |
| 5701 | return 0; |
| 5702 | |
| 5703 | if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN) |
| 5704 | remote_vcont_probe (rs); |
| 5705 | |
| 5706 | if (packet_support (PACKET_vCont) == PACKET_DISABLE) |
| 5707 | return 0; |
| 5708 | |
| 5709 | p = rs->buf; |
| 5710 | endp = rs->buf + get_remote_packet_size (); |
| 5711 | |
| 5712 | /* If we could generate a wider range of packets, we'd have to worry |
| 5713 | about overflowing BUF. Should there be a generic |
| 5714 | "multi-part-packet" packet? */ |
| 5715 | |
| 5716 | p += xsnprintf (p, endp - p, "vCont"); |
| 5717 | |
| 5718 | if (ptid_equal (ptid, magic_null_ptid)) |
| 5719 | { |
| 5720 | /* MAGIC_NULL_PTID means that we don't have any active threads, |
| 5721 | so we don't have any TID numbers the inferior will |
| 5722 | understand. Make sure to only send forms that do not specify |
| 5723 | a TID. */ |
| 5724 | append_resumption (p, endp, minus_one_ptid, step, siggnal); |
| 5725 | } |
| 5726 | else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid)) |
| 5727 | { |
| 5728 | /* Resume all threads (of all processes, or of a single |
| 5729 | process), with preference for INFERIOR_PTID. This assumes |
| 5730 | inferior_ptid belongs to the set of all threads we are about |
| 5731 | to resume. */ |
| 5732 | if (step || siggnal != GDB_SIGNAL_0) |
| 5733 | { |
| 5734 | /* Step inferior_ptid, with or without signal. */ |
| 5735 | p = append_resumption (p, endp, inferior_ptid, step, siggnal); |
| 5736 | } |
| 5737 | |
| 5738 | /* Also pass down any pending signaled resumption for other |
| 5739 | threads not the current. */ |
| 5740 | p = append_pending_thread_resumptions (p, endp, ptid); |
| 5741 | |
| 5742 | /* And continue others without a signal. */ |
| 5743 | append_resumption (p, endp, ptid, /*step=*/ 0, GDB_SIGNAL_0); |
| 5744 | } |
| 5745 | else |
| 5746 | { |
| 5747 | /* Scheduler locking; resume only PTID. */ |
| 5748 | append_resumption (p, endp, ptid, step, siggnal); |
| 5749 | } |
| 5750 | |
| 5751 | gdb_assert (strlen (rs->buf) < get_remote_packet_size ()); |
| 5752 | putpkt (rs->buf); |
| 5753 | |
| 5754 | if (target_is_non_stop_p ()) |
| 5755 | { |
| 5756 | /* In non-stop, the stub replies to vCont with "OK". The stop |
| 5757 | reply will be reported asynchronously by means of a `%Stop' |
| 5758 | notification. */ |
| 5759 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 5760 | if (strcmp (rs->buf, "OK") != 0) |
| 5761 | error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf); |
| 5762 | } |
| 5763 | |
| 5764 | return 1; |
| 5765 | } |
| 5766 | |
| 5767 | /* Tell the remote machine to resume. */ |
| 5768 | |
| 5769 | static void |
| 5770 | remote_resume (struct target_ops *ops, |
| 5771 | ptid_t ptid, int step, enum gdb_signal siggnal) |
| 5772 | { |
| 5773 | struct remote_state *rs = get_remote_state (); |
| 5774 | |
| 5775 | /* When connected in non-stop mode, the core resumes threads |
| 5776 | individually. Resuming remote threads directly in target_resume |
| 5777 | would thus result in sending one packet per thread. Instead, to |
| 5778 | minimize roundtrip latency, here we just store the resume |
| 5779 | request; the actual remote resumption will be done in |
| 5780 | target_commit_resume / remote_commit_resume, where we'll be able |
| 5781 | to do vCont action coalescing. */ |
| 5782 | if (target_is_non_stop_p () && execution_direction != EXEC_REVERSE) |
| 5783 | { |
| 5784 | struct private_thread_info *remote_thr; |
| 5785 | |
| 5786 | if (ptid_equal (minus_one_ptid, ptid) || ptid_is_pid (ptid)) |
| 5787 | remote_thr = get_private_info_ptid (inferior_ptid); |
| 5788 | else |
| 5789 | remote_thr = get_private_info_ptid (ptid); |
| 5790 | remote_thr->last_resume_step = step; |
| 5791 | remote_thr->last_resume_sig = siggnal; |
| 5792 | return; |
| 5793 | } |
| 5794 | |
| 5795 | /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN |
| 5796 | (explained in remote-notif.c:handle_notification) so |
| 5797 | remote_notif_process is not called. We need find a place where |
| 5798 | it is safe to start a 'vNotif' sequence. It is good to do it |
| 5799 | before resuming inferior, because inferior was stopped and no RSP |
| 5800 | traffic at that moment. */ |
| 5801 | if (!target_is_non_stop_p ()) |
| 5802 | remote_notif_process (rs->notif_state, ¬if_client_stop); |
| 5803 | |
| 5804 | rs->last_resume_exec_dir = execution_direction; |
| 5805 | |
| 5806 | /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */ |
| 5807 | if (!remote_resume_with_vcont (ptid, step, siggnal)) |
| 5808 | remote_resume_with_hc (ops, ptid, step, siggnal); |
| 5809 | |
| 5810 | /* We are about to start executing the inferior, let's register it |
| 5811 | with the event loop. NOTE: this is the one place where all the |
| 5812 | execution commands end up. We could alternatively do this in each |
| 5813 | of the execution commands in infcmd.c. */ |
| 5814 | /* FIXME: ezannoni 1999-09-28: We may need to move this out of here |
| 5815 | into infcmd.c in order to allow inferior function calls to work |
| 5816 | NOT asynchronously. */ |
| 5817 | if (target_can_async_p ()) |
| 5818 | target_async (1); |
| 5819 | |
| 5820 | /* We've just told the target to resume. The remote server will |
| 5821 | wait for the inferior to stop, and then send a stop reply. In |
| 5822 | the mean time, we can't start another command/query ourselves |
| 5823 | because the stub wouldn't be ready to process it. This applies |
| 5824 | only to the base all-stop protocol, however. In non-stop (which |
| 5825 | only supports vCont), the stub replies with an "OK", and is |
| 5826 | immediate able to process further serial input. */ |
| 5827 | if (!target_is_non_stop_p ()) |
| 5828 | rs->waiting_for_stop_reply = 1; |
| 5829 | } |
| 5830 | |
| 5831 | static void check_pending_events_prevent_wildcard_vcont |
| 5832 | (int *may_global_wildcard_vcont); |
| 5833 | static int is_pending_fork_parent_thread (struct thread_info *thread); |
| 5834 | |
| 5835 | /* Private per-inferior info for target remote processes. */ |
| 5836 | |
| 5837 | struct private_inferior |
| 5838 | { |
| 5839 | /* Whether we can send a wildcard vCont for this process. */ |
| 5840 | int may_wildcard_vcont; |
| 5841 | }; |
| 5842 | |
| 5843 | /* Structure used to track the construction of a vCont packet in the |
| 5844 | outgoing packet buffer. This is used to send multiple vCont |
| 5845 | packets if we have more actions than would fit a single packet. */ |
| 5846 | |
| 5847 | struct vcont_builder |
| 5848 | { |
| 5849 | /* Pointer to the first action. P points here if no action has been |
| 5850 | appended yet. */ |
| 5851 | char *first_action; |
| 5852 | |
| 5853 | /* Where the next action will be appended. */ |
| 5854 | char *p; |
| 5855 | |
| 5856 | /* The end of the buffer. Must never write past this. */ |
| 5857 | char *endp; |
| 5858 | }; |
| 5859 | |
| 5860 | /* Prepare the outgoing buffer for a new vCont packet. */ |
| 5861 | |
| 5862 | static void |
| 5863 | vcont_builder_restart (struct vcont_builder *builder) |
| 5864 | { |
| 5865 | struct remote_state *rs = get_remote_state (); |
| 5866 | |
| 5867 | builder->p = rs->buf; |
| 5868 | builder->endp = rs->buf + get_remote_packet_size (); |
| 5869 | builder->p += xsnprintf (builder->p, builder->endp - builder->p, "vCont"); |
| 5870 | builder->first_action = builder->p; |
| 5871 | } |
| 5872 | |
| 5873 | /* If the vCont packet being built has any action, send it to the |
| 5874 | remote end. */ |
| 5875 | |
| 5876 | static void |
| 5877 | vcont_builder_flush (struct vcont_builder *builder) |
| 5878 | { |
| 5879 | struct remote_state *rs; |
| 5880 | |
| 5881 | if (builder->p == builder->first_action) |
| 5882 | return; |
| 5883 | |
| 5884 | rs = get_remote_state (); |
| 5885 | putpkt (rs->buf); |
| 5886 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 5887 | if (strcmp (rs->buf, "OK") != 0) |
| 5888 | error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf); |
| 5889 | } |
| 5890 | |
| 5891 | /* The largest action is range-stepping, with its two addresses. This |
| 5892 | is more than sufficient. If a new, bigger action is created, it'll |
| 5893 | quickly trigger a failed assertion in append_resumption (and we'll |
| 5894 | just bump this). */ |
| 5895 | #define MAX_ACTION_SIZE 200 |
| 5896 | |
| 5897 | /* Append a new vCont action in the outgoing packet being built. If |
| 5898 | the action doesn't fit the packet along with previous actions, push |
| 5899 | what we've got so far to the remote end and start over a new vCont |
| 5900 | packet (with the new action). */ |
| 5901 | |
| 5902 | static void |
| 5903 | vcont_builder_push_action (struct vcont_builder *builder, |
| 5904 | ptid_t ptid, int step, enum gdb_signal siggnal) |
| 5905 | { |
| 5906 | char buf[MAX_ACTION_SIZE + 1]; |
| 5907 | char *endp; |
| 5908 | size_t rsize; |
| 5909 | |
| 5910 | endp = append_resumption (buf, buf + sizeof (buf), |
| 5911 | ptid, step, siggnal); |
| 5912 | |
| 5913 | /* Check whether this new action would fit in the vCont packet along |
| 5914 | with previous actions. If not, send what we've got so far and |
| 5915 | start a new vCont packet. */ |
| 5916 | rsize = endp - buf; |
| 5917 | if (rsize > builder->endp - builder->p) |
| 5918 | { |
| 5919 | vcont_builder_flush (builder); |
| 5920 | vcont_builder_restart (builder); |
| 5921 | |
| 5922 | /* Should now fit. */ |
| 5923 | gdb_assert (rsize <= builder->endp - builder->p); |
| 5924 | } |
| 5925 | |
| 5926 | memcpy (builder->p, buf, rsize); |
| 5927 | builder->p += rsize; |
| 5928 | *builder->p = '\0'; |
| 5929 | } |
| 5930 | |
| 5931 | /* to_commit_resume implementation. */ |
| 5932 | |
| 5933 | static void |
| 5934 | remote_commit_resume (struct target_ops *ops) |
| 5935 | { |
| 5936 | struct remote_state *rs = get_remote_state (); |
| 5937 | struct inferior *inf; |
| 5938 | struct thread_info *tp; |
| 5939 | int any_process_wildcard; |
| 5940 | int may_global_wildcard_vcont; |
| 5941 | struct vcont_builder vcont_builder; |
| 5942 | |
| 5943 | /* If connected in all-stop mode, we'd send the remote resume |
| 5944 | request directly from remote_resume. Likewise if |
| 5945 | reverse-debugging, as there are no defined vCont actions for |
| 5946 | reverse execution. */ |
| 5947 | if (!target_is_non_stop_p () || execution_direction == EXEC_REVERSE) |
| 5948 | return; |
| 5949 | |
| 5950 | /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1") |
| 5951 | instead of resuming all threads of each process individually. |
| 5952 | However, if any thread of a process must remain halted, we can't |
| 5953 | send wildcard resumes and must send one action per thread. |
| 5954 | |
| 5955 | Care must be taken to not resume threads/processes the server |
| 5956 | side already told us are stopped, but the core doesn't know about |
| 5957 | yet, because the events are still in the vStopped notification |
| 5958 | queue. For example: |
| 5959 | |
| 5960 | #1 => vCont s:p1.1;c |
| 5961 | #2 <= OK |
| 5962 | #3 <= %Stopped T05 p1.1 |
| 5963 | #4 => vStopped |
| 5964 | #5 <= T05 p1.2 |
| 5965 | #6 => vStopped |
| 5966 | #7 <= OK |
| 5967 | #8 (infrun handles the stop for p1.1 and continues stepping) |
| 5968 | #9 => vCont s:p1.1;c |
| 5969 | |
| 5970 | The last vCont above would resume thread p1.2 by mistake, because |
| 5971 | the server has no idea that the event for p1.2 had not been |
| 5972 | handled yet. |
| 5973 | |
| 5974 | The server side must similarly ignore resume actions for the |
| 5975 | thread that has a pending %Stopped notification (and any other |
| 5976 | threads with events pending), until GDB acks the notification |
| 5977 | with vStopped. Otherwise, e.g., the following case is |
| 5978 | mishandled: |
| 5979 | |
| 5980 | #1 => g (or any other packet) |
| 5981 | #2 <= [registers] |
| 5982 | #3 <= %Stopped T05 p1.2 |
| 5983 | #4 => vCont s:p1.1;c |
| 5984 | #5 <= OK |
| 5985 | |
| 5986 | Above, the server must not resume thread p1.2. GDB can't know |
| 5987 | that p1.2 stopped until it acks the %Stopped notification, and |
| 5988 | since from GDB's perspective all threads should be running, it |
| 5989 | sends a "c" action. |
| 5990 | |
| 5991 | Finally, special care must also be given to handling fork/vfork |
| 5992 | events. A (v)fork event actually tells us that two processes |
| 5993 | stopped -- the parent and the child. Until we follow the fork, |
| 5994 | we must not resume the child. Therefore, if we have a pending |
| 5995 | fork follow, we must not send a global wildcard resume action |
| 5996 | (vCont;c). We can still send process-wide wildcards though. */ |
| 5997 | |
| 5998 | /* Start by assuming a global wildcard (vCont;c) is possible. */ |
| 5999 | may_global_wildcard_vcont = 1; |
| 6000 | |
| 6001 | /* And assume every process is individually wildcard-able too. */ |
| 6002 | ALL_NON_EXITED_INFERIORS (inf) |
| 6003 | { |
| 6004 | if (inf->priv == NULL) |
| 6005 | inf->priv = XNEW (struct private_inferior); |
| 6006 | inf->priv->may_wildcard_vcont = 1; |
| 6007 | } |
| 6008 | |
| 6009 | /* Check for any pending events (not reported or processed yet) and |
| 6010 | disable process and global wildcard resumes appropriately. */ |
| 6011 | check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont); |
| 6012 | |
| 6013 | ALL_NON_EXITED_THREADS (tp) |
| 6014 | { |
| 6015 | /* If a thread of a process is not meant to be resumed, then we |
| 6016 | can't wildcard that process. */ |
| 6017 | if (!tp->executing) |
| 6018 | { |
| 6019 | tp->inf->priv->may_wildcard_vcont = 0; |
| 6020 | |
| 6021 | /* And if we can't wildcard a process, we can't wildcard |
| 6022 | everything either. */ |
| 6023 | may_global_wildcard_vcont = 0; |
| 6024 | continue; |
| 6025 | } |
| 6026 | |
| 6027 | /* If a thread is the parent of an unfollowed fork, then we |
| 6028 | can't do a global wildcard, as that would resume the fork |
| 6029 | child. */ |
| 6030 | if (is_pending_fork_parent_thread (tp)) |
| 6031 | may_global_wildcard_vcont = 0; |
| 6032 | } |
| 6033 | |
| 6034 | /* Now let's build the vCont packet(s). Actions must be appended |
| 6035 | from narrower to wider scopes (thread -> process -> global). If |
| 6036 | we end up with too many actions for a single packet vcont_builder |
| 6037 | flushes the current vCont packet to the remote side and starts a |
| 6038 | new one. */ |
| 6039 | vcont_builder_restart (&vcont_builder); |
| 6040 | |
| 6041 | /* Threads first. */ |
| 6042 | ALL_NON_EXITED_THREADS (tp) |
| 6043 | { |
| 6044 | struct private_thread_info *remote_thr = tp->priv; |
| 6045 | |
| 6046 | if (!tp->executing || remote_thr->vcont_resumed) |
| 6047 | continue; |
| 6048 | |
| 6049 | gdb_assert (!thread_is_in_step_over_chain (tp)); |
| 6050 | |
| 6051 | if (!remote_thr->last_resume_step |
| 6052 | && remote_thr->last_resume_sig == GDB_SIGNAL_0 |
| 6053 | && tp->inf->priv->may_wildcard_vcont) |
| 6054 | { |
| 6055 | /* We'll send a wildcard resume instead. */ |
| 6056 | remote_thr->vcont_resumed = 1; |
| 6057 | continue; |
| 6058 | } |
| 6059 | |
| 6060 | vcont_builder_push_action (&vcont_builder, tp->ptid, |
| 6061 | remote_thr->last_resume_step, |
| 6062 | remote_thr->last_resume_sig); |
| 6063 | remote_thr->vcont_resumed = 1; |
| 6064 | } |
| 6065 | |
| 6066 | /* Now check whether we can send any process-wide wildcard. This is |
| 6067 | to avoid sending a global wildcard in the case nothing is |
| 6068 | supposed to be resumed. */ |
| 6069 | any_process_wildcard = 0; |
| 6070 | |
| 6071 | ALL_NON_EXITED_INFERIORS (inf) |
| 6072 | { |
| 6073 | if (inf->priv->may_wildcard_vcont) |
| 6074 | { |
| 6075 | any_process_wildcard = 1; |
| 6076 | break; |
| 6077 | } |
| 6078 | } |
| 6079 | |
| 6080 | if (any_process_wildcard) |
| 6081 | { |
| 6082 | /* If all processes are wildcard-able, then send a single "c" |
| 6083 | action, otherwise, send an "all (-1) threads of process" |
| 6084 | continue action for each running process, if any. */ |
| 6085 | if (may_global_wildcard_vcont) |
| 6086 | { |
| 6087 | vcont_builder_push_action (&vcont_builder, minus_one_ptid, |
| 6088 | 0, GDB_SIGNAL_0); |
| 6089 | } |
| 6090 | else |
| 6091 | { |
| 6092 | ALL_NON_EXITED_INFERIORS (inf) |
| 6093 | { |
| 6094 | if (inf->priv->may_wildcard_vcont) |
| 6095 | { |
| 6096 | vcont_builder_push_action (&vcont_builder, |
| 6097 | pid_to_ptid (inf->pid), |
| 6098 | 0, GDB_SIGNAL_0); |
| 6099 | } |
| 6100 | } |
| 6101 | } |
| 6102 | } |
| 6103 | |
| 6104 | vcont_builder_flush (&vcont_builder); |
| 6105 | } |
| 6106 | |
| 6107 | \f |
| 6108 | |
| 6109 | /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote |
| 6110 | thread, all threads of a remote process, or all threads of all |
| 6111 | processes. */ |
| 6112 | |
| 6113 | static void |
| 6114 | remote_stop_ns (ptid_t ptid) |
| 6115 | { |
| 6116 | struct remote_state *rs = get_remote_state (); |
| 6117 | char *p = rs->buf; |
| 6118 | char *endp = rs->buf + get_remote_packet_size (); |
| 6119 | |
| 6120 | if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN) |
| 6121 | remote_vcont_probe (rs); |
| 6122 | |
| 6123 | if (!rs->supports_vCont.t) |
| 6124 | error (_("Remote server does not support stopping threads")); |
| 6125 | |
| 6126 | if (ptid_equal (ptid, minus_one_ptid) |
| 6127 | || (!remote_multi_process_p (rs) && ptid_is_pid (ptid))) |
| 6128 | p += xsnprintf (p, endp - p, "vCont;t"); |
| 6129 | else |
| 6130 | { |
| 6131 | ptid_t nptid; |
| 6132 | |
| 6133 | p += xsnprintf (p, endp - p, "vCont;t:"); |
| 6134 | |
| 6135 | if (ptid_is_pid (ptid)) |
| 6136 | /* All (-1) threads of process. */ |
| 6137 | nptid = ptid_build (ptid_get_pid (ptid), -1, 0); |
| 6138 | else |
| 6139 | { |
| 6140 | /* Small optimization: if we already have a stop reply for |
| 6141 | this thread, no use in telling the stub we want this |
| 6142 | stopped. */ |
| 6143 | if (peek_stop_reply (ptid)) |
| 6144 | return; |
| 6145 | |
| 6146 | nptid = ptid; |
| 6147 | } |
| 6148 | |
| 6149 | write_ptid (p, endp, nptid); |
| 6150 | } |
| 6151 | |
| 6152 | /* In non-stop, we get an immediate OK reply. The stop reply will |
| 6153 | come in asynchronously by notification. */ |
| 6154 | putpkt (rs->buf); |
| 6155 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 6156 | if (strcmp (rs->buf, "OK") != 0) |
| 6157 | error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf); |
| 6158 | } |
| 6159 | |
| 6160 | /* All-stop version of target_interrupt. Sends a break or a ^C to |
| 6161 | interrupt the remote target. It is undefined which thread of which |
| 6162 | process reports the interrupt. */ |
| 6163 | |
| 6164 | static void |
| 6165 | remote_interrupt_as (void) |
| 6166 | { |
| 6167 | struct remote_state *rs = get_remote_state (); |
| 6168 | |
| 6169 | rs->ctrlc_pending_p = 1; |
| 6170 | |
| 6171 | /* If the inferior is stopped already, but the core didn't know |
| 6172 | about it yet, just ignore the request. The cached wait status |
| 6173 | will be collected in remote_wait. */ |
| 6174 | if (rs->cached_wait_status) |
| 6175 | return; |
| 6176 | |
| 6177 | /* Send interrupt_sequence to remote target. */ |
| 6178 | send_interrupt_sequence (); |
| 6179 | } |
| 6180 | |
| 6181 | /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt |
| 6182 | the remote target. It is undefined which thread of which process |
| 6183 | reports the interrupt. Throws an error if the packet is not |
| 6184 | supported by the server. */ |
| 6185 | |
| 6186 | static void |
| 6187 | remote_interrupt_ns (void) |
| 6188 | { |
| 6189 | struct remote_state *rs = get_remote_state (); |
| 6190 | char *p = rs->buf; |
| 6191 | char *endp = rs->buf + get_remote_packet_size (); |
| 6192 | |
| 6193 | xsnprintf (p, endp - p, "vCtrlC"); |
| 6194 | |
| 6195 | /* In non-stop, we get an immediate OK reply. The stop reply will |
| 6196 | come in asynchronously by notification. */ |
| 6197 | putpkt (rs->buf); |
| 6198 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 6199 | |
| 6200 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vCtrlC])) |
| 6201 | { |
| 6202 | case PACKET_OK: |
| 6203 | break; |
| 6204 | case PACKET_UNKNOWN: |
| 6205 | error (_("No support for interrupting the remote target.")); |
| 6206 | case PACKET_ERROR: |
| 6207 | error (_("Interrupting target failed: %s"), rs->buf); |
| 6208 | } |
| 6209 | } |
| 6210 | |
| 6211 | /* Implement the to_stop function for the remote targets. */ |
| 6212 | |
| 6213 | static void |
| 6214 | remote_stop (struct target_ops *self, ptid_t ptid) |
| 6215 | { |
| 6216 | if (remote_debug) |
| 6217 | fprintf_unfiltered (gdb_stdlog, "remote_stop called\n"); |
| 6218 | |
| 6219 | if (target_is_non_stop_p ()) |
| 6220 | remote_stop_ns (ptid); |
| 6221 | else |
| 6222 | { |
| 6223 | /* We don't currently have a way to transparently pause the |
| 6224 | remote target in all-stop mode. Interrupt it instead. */ |
| 6225 | remote_interrupt_as (); |
| 6226 | } |
| 6227 | } |
| 6228 | |
| 6229 | /* Implement the to_interrupt function for the remote targets. */ |
| 6230 | |
| 6231 | static void |
| 6232 | remote_interrupt (struct target_ops *self, ptid_t ptid) |
| 6233 | { |
| 6234 | struct remote_state *rs = get_remote_state (); |
| 6235 | |
| 6236 | if (remote_debug) |
| 6237 | fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); |
| 6238 | |
| 6239 | if (target_is_non_stop_p ()) |
| 6240 | remote_interrupt_ns (); |
| 6241 | else |
| 6242 | remote_interrupt_as (); |
| 6243 | } |
| 6244 | |
| 6245 | /* Implement the to_pass_ctrlc function for the remote targets. */ |
| 6246 | |
| 6247 | static void |
| 6248 | remote_pass_ctrlc (struct target_ops *self) |
| 6249 | { |
| 6250 | struct remote_state *rs = get_remote_state (); |
| 6251 | |
| 6252 | if (remote_debug) |
| 6253 | fprintf_unfiltered (gdb_stdlog, "remote_pass_ctrlc called\n"); |
| 6254 | |
| 6255 | /* If we're starting up, we're not fully synced yet. Quit |
| 6256 | immediately. */ |
| 6257 | if (rs->starting_up) |
| 6258 | quit (); |
| 6259 | /* If ^C has already been sent once, offer to disconnect. */ |
| 6260 | else if (rs->ctrlc_pending_p) |
| 6261 | interrupt_query (); |
| 6262 | else |
| 6263 | target_interrupt (inferior_ptid); |
| 6264 | } |
| 6265 | |
| 6266 | /* Ask the user what to do when an interrupt is received. */ |
| 6267 | |
| 6268 | static void |
| 6269 | interrupt_query (void) |
| 6270 | { |
| 6271 | struct remote_state *rs = get_remote_state (); |
| 6272 | |
| 6273 | if (rs->waiting_for_stop_reply && rs->ctrlc_pending_p) |
| 6274 | { |
| 6275 | if (query (_("The target is not responding to interrupt requests.\n" |
| 6276 | "Stop debugging it? "))) |
| 6277 | { |
| 6278 | remote_unpush_target (); |
| 6279 | throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target.")); |
| 6280 | } |
| 6281 | } |
| 6282 | else |
| 6283 | { |
| 6284 | if (query (_("Interrupted while waiting for the program.\n" |
| 6285 | "Give up waiting? "))) |
| 6286 | quit (); |
| 6287 | } |
| 6288 | } |
| 6289 | |
| 6290 | /* Enable/disable target terminal ownership. Most targets can use |
| 6291 | terminal groups to control terminal ownership. Remote targets are |
| 6292 | different in that explicit transfer of ownership to/from GDB/target |
| 6293 | is required. */ |
| 6294 | |
| 6295 | static void |
| 6296 | remote_terminal_inferior (struct target_ops *self) |
| 6297 | { |
| 6298 | /* NOTE: At this point we could also register our selves as the |
| 6299 | recipient of all input. Any characters typed could then be |
| 6300 | passed on down to the target. */ |
| 6301 | } |
| 6302 | |
| 6303 | static void |
| 6304 | remote_terminal_ours (struct target_ops *self) |
| 6305 | { |
| 6306 | } |
| 6307 | |
| 6308 | static void |
| 6309 | remote_console_output (char *msg) |
| 6310 | { |
| 6311 | char *p; |
| 6312 | |
| 6313 | for (p = msg; p[0] && p[1]; p += 2) |
| 6314 | { |
| 6315 | char tb[2]; |
| 6316 | char c = fromhex (p[0]) * 16 + fromhex (p[1]); |
| 6317 | |
| 6318 | tb[0] = c; |
| 6319 | tb[1] = 0; |
| 6320 | fputs_unfiltered (tb, gdb_stdtarg); |
| 6321 | } |
| 6322 | gdb_flush (gdb_stdtarg); |
| 6323 | } |
| 6324 | |
| 6325 | DEF_VEC_O(cached_reg_t); |
| 6326 | |
| 6327 | typedef struct stop_reply |
| 6328 | { |
| 6329 | struct notif_event base; |
| 6330 | |
| 6331 | /* The identifier of the thread about this event */ |
| 6332 | ptid_t ptid; |
| 6333 | |
| 6334 | /* The remote state this event is associated with. When the remote |
| 6335 | connection, represented by a remote_state object, is closed, |
| 6336 | all the associated stop_reply events should be released. */ |
| 6337 | struct remote_state *rs; |
| 6338 | |
| 6339 | struct target_waitstatus ws; |
| 6340 | |
| 6341 | /* The architecture associated with the expedited registers. */ |
| 6342 | gdbarch *arch; |
| 6343 | |
| 6344 | /* Expedited registers. This makes remote debugging a bit more |
| 6345 | efficient for those targets that provide critical registers as |
| 6346 | part of their normal status mechanism (as another roundtrip to |
| 6347 | fetch them is avoided). */ |
| 6348 | VEC(cached_reg_t) *regcache; |
| 6349 | |
| 6350 | enum target_stop_reason stop_reason; |
| 6351 | |
| 6352 | CORE_ADDR watch_data_address; |
| 6353 | |
| 6354 | int core; |
| 6355 | } *stop_reply_p; |
| 6356 | |
| 6357 | DECLARE_QUEUE_P (stop_reply_p); |
| 6358 | DEFINE_QUEUE_P (stop_reply_p); |
| 6359 | /* The list of already fetched and acknowledged stop events. This |
| 6360 | queue is used for notification Stop, and other notifications |
| 6361 | don't need queue for their events, because the notification events |
| 6362 | of Stop can't be consumed immediately, so that events should be |
| 6363 | queued first, and be consumed by remote_wait_{ns,as} one per |
| 6364 | time. Other notifications can consume their events immediately, |
| 6365 | so queue is not needed for them. */ |
| 6366 | static QUEUE (stop_reply_p) *stop_reply_queue; |
| 6367 | |
| 6368 | static void |
| 6369 | stop_reply_xfree (struct stop_reply *r) |
| 6370 | { |
| 6371 | notif_event_xfree ((struct notif_event *) r); |
| 6372 | } |
| 6373 | |
| 6374 | /* Return the length of the stop reply queue. */ |
| 6375 | |
| 6376 | static int |
| 6377 | stop_reply_queue_length (void) |
| 6378 | { |
| 6379 | return QUEUE_length (stop_reply_p, stop_reply_queue); |
| 6380 | } |
| 6381 | |
| 6382 | static void |
| 6383 | remote_notif_stop_parse (struct notif_client *self, char *buf, |
| 6384 | struct notif_event *event) |
| 6385 | { |
| 6386 | remote_parse_stop_reply (buf, (struct stop_reply *) event); |
| 6387 | } |
| 6388 | |
| 6389 | static void |
| 6390 | remote_notif_stop_ack (struct notif_client *self, char *buf, |
| 6391 | struct notif_event *event) |
| 6392 | { |
| 6393 | struct stop_reply *stop_reply = (struct stop_reply *) event; |
| 6394 | |
| 6395 | /* acknowledge */ |
| 6396 | putpkt (self->ack_command); |
| 6397 | |
| 6398 | if (stop_reply->ws.kind == TARGET_WAITKIND_IGNORE) |
| 6399 | /* We got an unknown stop reply. */ |
| 6400 | error (_("Unknown stop reply")); |
| 6401 | |
| 6402 | push_stop_reply (stop_reply); |
| 6403 | } |
| 6404 | |
| 6405 | static int |
| 6406 | remote_notif_stop_can_get_pending_events (struct notif_client *self) |
| 6407 | { |
| 6408 | /* We can't get pending events in remote_notif_process for |
| 6409 | notification stop, and we have to do this in remote_wait_ns |
| 6410 | instead. If we fetch all queued events from stub, remote stub |
| 6411 | may exit and we have no chance to process them back in |
| 6412 | remote_wait_ns. */ |
| 6413 | mark_async_event_handler (remote_async_inferior_event_token); |
| 6414 | return 0; |
| 6415 | } |
| 6416 | |
| 6417 | static void |
| 6418 | stop_reply_dtr (struct notif_event *event) |
| 6419 | { |
| 6420 | struct stop_reply *r = (struct stop_reply *) event; |
| 6421 | cached_reg_t *reg; |
| 6422 | int ix; |
| 6423 | |
| 6424 | for (ix = 0; |
| 6425 | VEC_iterate (cached_reg_t, r->regcache, ix, reg); |
| 6426 | ix++) |
| 6427 | xfree (reg->data); |
| 6428 | |
| 6429 | VEC_free (cached_reg_t, r->regcache); |
| 6430 | } |
| 6431 | |
| 6432 | static struct notif_event * |
| 6433 | remote_notif_stop_alloc_reply (void) |
| 6434 | { |
| 6435 | /* We cast to a pointer to the "base class". */ |
| 6436 | struct notif_event *r = (struct notif_event *) XNEW (struct stop_reply); |
| 6437 | |
| 6438 | r->dtr = stop_reply_dtr; |
| 6439 | |
| 6440 | return r; |
| 6441 | } |
| 6442 | |
| 6443 | /* A client of notification Stop. */ |
| 6444 | |
| 6445 | struct notif_client notif_client_stop = |
| 6446 | { |
| 6447 | "Stop", |
| 6448 | "vStopped", |
| 6449 | remote_notif_stop_parse, |
| 6450 | remote_notif_stop_ack, |
| 6451 | remote_notif_stop_can_get_pending_events, |
| 6452 | remote_notif_stop_alloc_reply, |
| 6453 | REMOTE_NOTIF_STOP, |
| 6454 | }; |
| 6455 | |
| 6456 | /* A parameter to pass data in and out. */ |
| 6457 | |
| 6458 | struct queue_iter_param |
| 6459 | { |
| 6460 | void *input; |
| 6461 | struct stop_reply *output; |
| 6462 | }; |
| 6463 | |
| 6464 | /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains |
| 6465 | the pid of the process that owns the threads we want to check, or |
| 6466 | -1 if we want to check all threads. */ |
| 6467 | |
| 6468 | static int |
| 6469 | is_pending_fork_parent (struct target_waitstatus *ws, int event_pid, |
| 6470 | ptid_t thread_ptid) |
| 6471 | { |
| 6472 | if (ws->kind == TARGET_WAITKIND_FORKED |
| 6473 | || ws->kind == TARGET_WAITKIND_VFORKED) |
| 6474 | { |
| 6475 | if (event_pid == -1 || event_pid == ptid_get_pid (thread_ptid)) |
| 6476 | return 1; |
| 6477 | } |
| 6478 | |
| 6479 | return 0; |
| 6480 | } |
| 6481 | |
| 6482 | /* Return the thread's pending status used to determine whether the |
| 6483 | thread is a fork parent stopped at a fork event. */ |
| 6484 | |
| 6485 | static struct target_waitstatus * |
| 6486 | thread_pending_fork_status (struct thread_info *thread) |
| 6487 | { |
| 6488 | if (thread->suspend.waitstatus_pending_p) |
| 6489 | return &thread->suspend.waitstatus; |
| 6490 | else |
| 6491 | return &thread->pending_follow; |
| 6492 | } |
| 6493 | |
| 6494 | /* Determine if THREAD is a pending fork parent thread. */ |
| 6495 | |
| 6496 | static int |
| 6497 | is_pending_fork_parent_thread (struct thread_info *thread) |
| 6498 | { |
| 6499 | struct target_waitstatus *ws = thread_pending_fork_status (thread); |
| 6500 | int pid = -1; |
| 6501 | |
| 6502 | return is_pending_fork_parent (ws, pid, thread->ptid); |
| 6503 | } |
| 6504 | |
| 6505 | /* Check whether EVENT is a fork event, and if it is, remove the |
| 6506 | fork child from the context list passed in DATA. */ |
| 6507 | |
| 6508 | static int |
| 6509 | remove_child_of_pending_fork (QUEUE (stop_reply_p) *q, |
| 6510 | QUEUE_ITER (stop_reply_p) *iter, |
| 6511 | stop_reply_p event, |
| 6512 | void *data) |
| 6513 | { |
| 6514 | struct queue_iter_param *param = (struct queue_iter_param *) data; |
| 6515 | struct threads_listing_context *context |
| 6516 | = (struct threads_listing_context *) param->input; |
| 6517 | |
| 6518 | if (event->ws.kind == TARGET_WAITKIND_FORKED |
| 6519 | || event->ws.kind == TARGET_WAITKIND_VFORKED |
| 6520 | || event->ws.kind == TARGET_WAITKIND_THREAD_EXITED) |
| 6521 | threads_listing_context_remove (&event->ws, context); |
| 6522 | |
| 6523 | return 1; |
| 6524 | } |
| 6525 | |
| 6526 | /* If CONTEXT contains any fork child threads that have not been |
| 6527 | reported yet, remove them from the CONTEXT list. If such a |
| 6528 | thread exists it is because we are stopped at a fork catchpoint |
| 6529 | and have not yet called follow_fork, which will set up the |
| 6530 | host-side data structures for the new process. */ |
| 6531 | |
| 6532 | static void |
| 6533 | remove_new_fork_children (struct threads_listing_context *context) |
| 6534 | { |
| 6535 | struct thread_info * thread; |
| 6536 | int pid = -1; |
| 6537 | struct notif_client *notif = ¬if_client_stop; |
| 6538 | struct queue_iter_param param; |
| 6539 | |
| 6540 | /* For any threads stopped at a fork event, remove the corresponding |
| 6541 | fork child threads from the CONTEXT list. */ |
| 6542 | ALL_NON_EXITED_THREADS (thread) |
| 6543 | { |
| 6544 | struct target_waitstatus *ws = thread_pending_fork_status (thread); |
| 6545 | |
| 6546 | if (is_pending_fork_parent (ws, pid, thread->ptid)) |
| 6547 | { |
| 6548 | threads_listing_context_remove (ws, context); |
| 6549 | } |
| 6550 | } |
| 6551 | |
| 6552 | /* Check for any pending fork events (not reported or processed yet) |
| 6553 | in process PID and remove those fork child threads from the |
| 6554 | CONTEXT list as well. */ |
| 6555 | remote_notif_get_pending_events (notif); |
| 6556 | param.input = context; |
| 6557 | param.output = NULL; |
| 6558 | QUEUE_iterate (stop_reply_p, stop_reply_queue, |
| 6559 | remove_child_of_pending_fork, ¶m); |
| 6560 | } |
| 6561 | |
| 6562 | /* Check whether EVENT would prevent a global or process wildcard |
| 6563 | vCont action. */ |
| 6564 | |
| 6565 | static int |
| 6566 | check_pending_event_prevents_wildcard_vcont_callback |
| 6567 | (QUEUE (stop_reply_p) *q, |
| 6568 | QUEUE_ITER (stop_reply_p) *iter, |
| 6569 | stop_reply_p event, |
| 6570 | void *data) |
| 6571 | { |
| 6572 | struct inferior *inf; |
| 6573 | int *may_global_wildcard_vcont = (int *) data; |
| 6574 | |
| 6575 | if (event->ws.kind == TARGET_WAITKIND_NO_RESUMED |
| 6576 | || event->ws.kind == TARGET_WAITKIND_NO_HISTORY) |
| 6577 | return 1; |
| 6578 | |
| 6579 | if (event->ws.kind == TARGET_WAITKIND_FORKED |
| 6580 | || event->ws.kind == TARGET_WAITKIND_VFORKED) |
| 6581 | *may_global_wildcard_vcont = 0; |
| 6582 | |
| 6583 | inf = find_inferior_ptid (event->ptid); |
| 6584 | |
| 6585 | /* This may be the first time we heard about this process. |
| 6586 | Regardless, we must not do a global wildcard resume, otherwise |
| 6587 | we'd resume this process too. */ |
| 6588 | *may_global_wildcard_vcont = 0; |
| 6589 | if (inf != NULL) |
| 6590 | inf->priv->may_wildcard_vcont = 0; |
| 6591 | |
| 6592 | return 1; |
| 6593 | } |
| 6594 | |
| 6595 | /* Check whether any event pending in the vStopped queue would prevent |
| 6596 | a global or process wildcard vCont action. Clear |
| 6597 | *may_global_wildcard if we can't do a global wildcard (vCont;c), |
| 6598 | and clear the event inferior's may_wildcard_vcont flag if we can't |
| 6599 | do a process-wide wildcard resume (vCont;c:pPID.-1). */ |
| 6600 | |
| 6601 | static void |
| 6602 | check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard) |
| 6603 | { |
| 6604 | struct notif_client *notif = ¬if_client_stop; |
| 6605 | |
| 6606 | remote_notif_get_pending_events (notif); |
| 6607 | QUEUE_iterate (stop_reply_p, stop_reply_queue, |
| 6608 | check_pending_event_prevents_wildcard_vcont_callback, |
| 6609 | may_global_wildcard); |
| 6610 | } |
| 6611 | |
| 6612 | /* Remove stop replies in the queue if its pid is equal to the given |
| 6613 | inferior's pid. */ |
| 6614 | |
| 6615 | static int |
| 6616 | remove_stop_reply_for_inferior (QUEUE (stop_reply_p) *q, |
| 6617 | QUEUE_ITER (stop_reply_p) *iter, |
| 6618 | stop_reply_p event, |
| 6619 | void *data) |
| 6620 | { |
| 6621 | struct queue_iter_param *param = (struct queue_iter_param *) data; |
| 6622 | struct inferior *inf = (struct inferior *) param->input; |
| 6623 | |
| 6624 | if (ptid_get_pid (event->ptid) == inf->pid) |
| 6625 | { |
| 6626 | stop_reply_xfree (event); |
| 6627 | QUEUE_remove_elem (stop_reply_p, q, iter); |
| 6628 | } |
| 6629 | |
| 6630 | return 1; |
| 6631 | } |
| 6632 | |
| 6633 | /* Discard all pending stop replies of inferior INF. */ |
| 6634 | |
| 6635 | static void |
| 6636 | discard_pending_stop_replies (struct inferior *inf) |
| 6637 | { |
| 6638 | struct queue_iter_param param; |
| 6639 | struct stop_reply *reply; |
| 6640 | struct remote_state *rs = get_remote_state (); |
| 6641 | struct remote_notif_state *rns = rs->notif_state; |
| 6642 | |
| 6643 | /* This function can be notified when an inferior exists. When the |
| 6644 | target is not remote, the notification state is NULL. */ |
| 6645 | if (rs->remote_desc == NULL) |
| 6646 | return; |
| 6647 | |
| 6648 | reply = (struct stop_reply *) rns->pending_event[notif_client_stop.id]; |
| 6649 | |
| 6650 | /* Discard the in-flight notification. */ |
| 6651 | if (reply != NULL && ptid_get_pid (reply->ptid) == inf->pid) |
| 6652 | { |
| 6653 | stop_reply_xfree (reply); |
| 6654 | rns->pending_event[notif_client_stop.id] = NULL; |
| 6655 | } |
| 6656 | |
| 6657 | param.input = inf; |
| 6658 | param.output = NULL; |
| 6659 | /* Discard the stop replies we have already pulled with |
| 6660 | vStopped. */ |
| 6661 | QUEUE_iterate (stop_reply_p, stop_reply_queue, |
| 6662 | remove_stop_reply_for_inferior, ¶m); |
| 6663 | } |
| 6664 | |
| 6665 | /* If its remote state is equal to the given remote state, |
| 6666 | remove EVENT from the stop reply queue. */ |
| 6667 | |
| 6668 | static int |
| 6669 | remove_stop_reply_of_remote_state (QUEUE (stop_reply_p) *q, |
| 6670 | QUEUE_ITER (stop_reply_p) *iter, |
| 6671 | stop_reply_p event, |
| 6672 | void *data) |
| 6673 | { |
| 6674 | struct queue_iter_param *param = (struct queue_iter_param *) data; |
| 6675 | struct remote_state *rs = (struct remote_state *) param->input; |
| 6676 | |
| 6677 | if (event->rs == rs) |
| 6678 | { |
| 6679 | stop_reply_xfree (event); |
| 6680 | QUEUE_remove_elem (stop_reply_p, q, iter); |
| 6681 | } |
| 6682 | |
| 6683 | return 1; |
| 6684 | } |
| 6685 | |
| 6686 | /* Discard the stop replies for RS in stop_reply_queue. */ |
| 6687 | |
| 6688 | static void |
| 6689 | discard_pending_stop_replies_in_queue (struct remote_state *rs) |
| 6690 | { |
| 6691 | struct queue_iter_param param; |
| 6692 | |
| 6693 | param.input = rs; |
| 6694 | param.output = NULL; |
| 6695 | /* Discard the stop replies we have already pulled with |
| 6696 | vStopped. */ |
| 6697 | QUEUE_iterate (stop_reply_p, stop_reply_queue, |
| 6698 | remove_stop_reply_of_remote_state, ¶m); |
| 6699 | } |
| 6700 | |
| 6701 | /* A parameter to pass data in and out. */ |
| 6702 | |
| 6703 | static int |
| 6704 | remote_notif_remove_once_on_match (QUEUE (stop_reply_p) *q, |
| 6705 | QUEUE_ITER (stop_reply_p) *iter, |
| 6706 | stop_reply_p event, |
| 6707 | void *data) |
| 6708 | { |
| 6709 | struct queue_iter_param *param = (struct queue_iter_param *) data; |
| 6710 | ptid_t *ptid = (ptid_t *) param->input; |
| 6711 | |
| 6712 | if (ptid_match (event->ptid, *ptid)) |
| 6713 | { |
| 6714 | param->output = event; |
| 6715 | QUEUE_remove_elem (stop_reply_p, q, iter); |
| 6716 | return 0; |
| 6717 | } |
| 6718 | |
| 6719 | return 1; |
| 6720 | } |
| 6721 | |
| 6722 | /* Remove the first reply in 'stop_reply_queue' which matches |
| 6723 | PTID. */ |
| 6724 | |
| 6725 | static struct stop_reply * |
| 6726 | remote_notif_remove_queued_reply (ptid_t ptid) |
| 6727 | { |
| 6728 | struct queue_iter_param param; |
| 6729 | |
| 6730 | param.input = &ptid; |
| 6731 | param.output = NULL; |
| 6732 | |
| 6733 | QUEUE_iterate (stop_reply_p, stop_reply_queue, |
| 6734 | remote_notif_remove_once_on_match, ¶m); |
| 6735 | if (notif_debug) |
| 6736 | fprintf_unfiltered (gdb_stdlog, |
| 6737 | "notif: discard queued event: 'Stop' in %s\n", |
| 6738 | target_pid_to_str (ptid)); |
| 6739 | |
| 6740 | return param.output; |
| 6741 | } |
| 6742 | |
| 6743 | /* Look for a queued stop reply belonging to PTID. If one is found, |
| 6744 | remove it from the queue, and return it. Returns NULL if none is |
| 6745 | found. If there are still queued events left to process, tell the |
| 6746 | event loop to get back to target_wait soon. */ |
| 6747 | |
| 6748 | static struct stop_reply * |
| 6749 | queued_stop_reply (ptid_t ptid) |
| 6750 | { |
| 6751 | struct stop_reply *r = remote_notif_remove_queued_reply (ptid); |
| 6752 | |
| 6753 | if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue)) |
| 6754 | /* There's still at least an event left. */ |
| 6755 | mark_async_event_handler (remote_async_inferior_event_token); |
| 6756 | |
| 6757 | return r; |
| 6758 | } |
| 6759 | |
| 6760 | /* Push a fully parsed stop reply in the stop reply queue. Since we |
| 6761 | know that we now have at least one queued event left to pass to the |
| 6762 | core side, tell the event loop to get back to target_wait soon. */ |
| 6763 | |
| 6764 | static void |
| 6765 | push_stop_reply (struct stop_reply *new_event) |
| 6766 | { |
| 6767 | QUEUE_enque (stop_reply_p, stop_reply_queue, new_event); |
| 6768 | |
| 6769 | if (notif_debug) |
| 6770 | fprintf_unfiltered (gdb_stdlog, |
| 6771 | "notif: push 'Stop' %s to queue %d\n", |
| 6772 | target_pid_to_str (new_event->ptid), |
| 6773 | QUEUE_length (stop_reply_p, |
| 6774 | stop_reply_queue)); |
| 6775 | |
| 6776 | mark_async_event_handler (remote_async_inferior_event_token); |
| 6777 | } |
| 6778 | |
| 6779 | static int |
| 6780 | stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p) *q, |
| 6781 | QUEUE_ITER (stop_reply_p) *iter, |
| 6782 | struct stop_reply *event, |
| 6783 | void *data) |
| 6784 | { |
| 6785 | ptid_t *ptid = (ptid_t *) data; |
| 6786 | |
| 6787 | return !(ptid_equal (*ptid, event->ptid) |
| 6788 | && event->ws.kind == TARGET_WAITKIND_STOPPED); |
| 6789 | } |
| 6790 | |
| 6791 | /* Returns true if we have a stop reply for PTID. */ |
| 6792 | |
| 6793 | static int |
| 6794 | peek_stop_reply (ptid_t ptid) |
| 6795 | { |
| 6796 | return !QUEUE_iterate (stop_reply_p, stop_reply_queue, |
| 6797 | stop_reply_match_ptid_and_ws, &ptid); |
| 6798 | } |
| 6799 | |
| 6800 | /* Helper for remote_parse_stop_reply. Return nonzero if the substring |
| 6801 | starting with P and ending with PEND matches PREFIX. */ |
| 6802 | |
| 6803 | static int |
| 6804 | strprefix (const char *p, const char *pend, const char *prefix) |
| 6805 | { |
| 6806 | for ( ; p < pend; p++, prefix++) |
| 6807 | if (*p != *prefix) |
| 6808 | return 0; |
| 6809 | return *prefix == '\0'; |
| 6810 | } |
| 6811 | |
| 6812 | /* Parse the stop reply in BUF. Either the function succeeds, and the |
| 6813 | result is stored in EVENT, or throws an error. */ |
| 6814 | |
| 6815 | static void |
| 6816 | remote_parse_stop_reply (char *buf, struct stop_reply *event) |
| 6817 | { |
| 6818 | remote_arch_state *rsa = NULL; |
| 6819 | ULONGEST addr; |
| 6820 | const char *p; |
| 6821 | int skipregs = 0; |
| 6822 | |
| 6823 | event->ptid = null_ptid; |
| 6824 | event->rs = get_remote_state (); |
| 6825 | event->ws.kind = TARGET_WAITKIND_IGNORE; |
| 6826 | event->ws.value.integer = 0; |
| 6827 | event->stop_reason = TARGET_STOPPED_BY_NO_REASON; |
| 6828 | event->regcache = NULL; |
| 6829 | event->core = -1; |
| 6830 | |
| 6831 | switch (buf[0]) |
| 6832 | { |
| 6833 | case 'T': /* Status with PC, SP, FP, ... */ |
| 6834 | /* Expedited reply, containing Signal, {regno, reg} repeat. */ |
| 6835 | /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where |
| 6836 | ss = signal number |
| 6837 | n... = register number |
| 6838 | r... = register contents |
| 6839 | */ |
| 6840 | |
| 6841 | p = &buf[3]; /* after Txx */ |
| 6842 | while (*p) |
| 6843 | { |
| 6844 | const char *p1; |
| 6845 | int fieldsize; |
| 6846 | |
| 6847 | p1 = strchr (p, ':'); |
| 6848 | if (p1 == NULL) |
| 6849 | error (_("Malformed packet(a) (missing colon): %s\n\ |
| 6850 | Packet: '%s'\n"), |
| 6851 | p, buf); |
| 6852 | if (p == p1) |
| 6853 | error (_("Malformed packet(a) (missing register number): %s\n\ |
| 6854 | Packet: '%s'\n"), |
| 6855 | p, buf); |
| 6856 | |
| 6857 | /* Some "registers" are actually extended stop information. |
| 6858 | Note if you're adding a new entry here: GDB 7.9 and |
| 6859 | earlier assume that all register "numbers" that start |
| 6860 | with an hex digit are real register numbers. Make sure |
| 6861 | the server only sends such a packet if it knows the |
| 6862 | client understands it. */ |
| 6863 | |
| 6864 | if (strprefix (p, p1, "thread")) |
| 6865 | event->ptid = read_ptid (++p1, &p); |
| 6866 | else if (strprefix (p, p1, "syscall_entry")) |
| 6867 | { |
| 6868 | ULONGEST sysno; |
| 6869 | |
| 6870 | event->ws.kind = TARGET_WAITKIND_SYSCALL_ENTRY; |
| 6871 | p = unpack_varlen_hex (++p1, &sysno); |
| 6872 | event->ws.value.syscall_number = (int) sysno; |
| 6873 | } |
| 6874 | else if (strprefix (p, p1, "syscall_return")) |
| 6875 | { |
| 6876 | ULONGEST sysno; |
| 6877 | |
| 6878 | event->ws.kind = TARGET_WAITKIND_SYSCALL_RETURN; |
| 6879 | p = unpack_varlen_hex (++p1, &sysno); |
| 6880 | event->ws.value.syscall_number = (int) sysno; |
| 6881 | } |
| 6882 | else if (strprefix (p, p1, "watch") |
| 6883 | || strprefix (p, p1, "rwatch") |
| 6884 | || strprefix (p, p1, "awatch")) |
| 6885 | { |
| 6886 | event->stop_reason = TARGET_STOPPED_BY_WATCHPOINT; |
| 6887 | p = unpack_varlen_hex (++p1, &addr); |
| 6888 | event->watch_data_address = (CORE_ADDR) addr; |
| 6889 | } |
| 6890 | else if (strprefix (p, p1, "swbreak")) |
| 6891 | { |
| 6892 | event->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT; |
| 6893 | |
| 6894 | /* Make sure the stub doesn't forget to indicate support |
| 6895 | with qSupported. */ |
| 6896 | if (packet_support (PACKET_swbreak_feature) != PACKET_ENABLE) |
| 6897 | error (_("Unexpected swbreak stop reason")); |
| 6898 | |
| 6899 | /* The value part is documented as "must be empty", |
| 6900 | though we ignore it, in case we ever decide to make |
| 6901 | use of it in a backward compatible way. */ |
| 6902 | p = strchrnul (p1 + 1, ';'); |
| 6903 | } |
| 6904 | else if (strprefix (p, p1, "hwbreak")) |
| 6905 | { |
| 6906 | event->stop_reason = TARGET_STOPPED_BY_HW_BREAKPOINT; |
| 6907 | |
| 6908 | /* Make sure the stub doesn't forget to indicate support |
| 6909 | with qSupported. */ |
| 6910 | if (packet_support (PACKET_hwbreak_feature) != PACKET_ENABLE) |
| 6911 | error (_("Unexpected hwbreak stop reason")); |
| 6912 | |
| 6913 | /* See above. */ |
| 6914 | p = strchrnul (p1 + 1, ';'); |
| 6915 | } |
| 6916 | else if (strprefix (p, p1, "library")) |
| 6917 | { |
| 6918 | event->ws.kind = TARGET_WAITKIND_LOADED; |
| 6919 | p = strchrnul (p1 + 1, ';'); |
| 6920 | } |
| 6921 | else if (strprefix (p, p1, "replaylog")) |
| 6922 | { |
| 6923 | event->ws.kind = TARGET_WAITKIND_NO_HISTORY; |
| 6924 | /* p1 will indicate "begin" or "end", but it makes |
| 6925 | no difference for now, so ignore it. */ |
| 6926 | p = strchrnul (p1 + 1, ';'); |
| 6927 | } |
| 6928 | else if (strprefix (p, p1, "core")) |
| 6929 | { |
| 6930 | ULONGEST c; |
| 6931 | |
| 6932 | p = unpack_varlen_hex (++p1, &c); |
| 6933 | event->core = c; |
| 6934 | } |
| 6935 | else if (strprefix (p, p1, "fork")) |
| 6936 | { |
| 6937 | event->ws.value.related_pid = read_ptid (++p1, &p); |
| 6938 | event->ws.kind = TARGET_WAITKIND_FORKED; |
| 6939 | } |
| 6940 | else if (strprefix (p, p1, "vfork")) |
| 6941 | { |
| 6942 | event->ws.value.related_pid = read_ptid (++p1, &p); |
| 6943 | event->ws.kind = TARGET_WAITKIND_VFORKED; |
| 6944 | } |
| 6945 | else if (strprefix (p, p1, "vforkdone")) |
| 6946 | { |
| 6947 | event->ws.kind = TARGET_WAITKIND_VFORK_DONE; |
| 6948 | p = strchrnul (p1 + 1, ';'); |
| 6949 | } |
| 6950 | else if (strprefix (p, p1, "exec")) |
| 6951 | { |
| 6952 | ULONGEST ignored; |
| 6953 | char pathname[PATH_MAX]; |
| 6954 | int pathlen; |
| 6955 | |
| 6956 | /* Determine the length of the execd pathname. */ |
| 6957 | p = unpack_varlen_hex (++p1, &ignored); |
| 6958 | pathlen = (p - p1) / 2; |
| 6959 | |
| 6960 | /* Save the pathname for event reporting and for |
| 6961 | the next run command. */ |
| 6962 | hex2bin (p1, (gdb_byte *) pathname, pathlen); |
| 6963 | pathname[pathlen] = '\0'; |
| 6964 | |
| 6965 | /* This is freed during event handling. */ |
| 6966 | event->ws.value.execd_pathname = xstrdup (pathname); |
| 6967 | event->ws.kind = TARGET_WAITKIND_EXECD; |
| 6968 | |
| 6969 | /* Skip the registers included in this packet, since |
| 6970 | they may be for an architecture different from the |
| 6971 | one used by the original program. */ |
| 6972 | skipregs = 1; |
| 6973 | } |
| 6974 | else if (strprefix (p, p1, "create")) |
| 6975 | { |
| 6976 | event->ws.kind = TARGET_WAITKIND_THREAD_CREATED; |
| 6977 | p = strchrnul (p1 + 1, ';'); |
| 6978 | } |
| 6979 | else |
| 6980 | { |
| 6981 | ULONGEST pnum; |
| 6982 | const char *p_temp; |
| 6983 | |
| 6984 | if (skipregs) |
| 6985 | { |
| 6986 | p = strchrnul (p1 + 1, ';'); |
| 6987 | p++; |
| 6988 | continue; |
| 6989 | } |
| 6990 | |
| 6991 | /* Maybe a real ``P'' register number. */ |
| 6992 | p_temp = unpack_varlen_hex (p, &pnum); |
| 6993 | /* If the first invalid character is the colon, we got a |
| 6994 | register number. Otherwise, it's an unknown stop |
| 6995 | reason. */ |
| 6996 | if (p_temp == p1) |
| 6997 | { |
| 6998 | /* If we haven't parsed the event's thread yet, find |
| 6999 | it now, in order to find the architecture of the |
| 7000 | reported expedited registers. */ |
| 7001 | if (event->ptid == null_ptid) |
| 7002 | { |
| 7003 | const char *thr = strstr (p1 + 1, ";thread:"); |
| 7004 | if (thr != NULL) |
| 7005 | event->ptid = read_ptid (thr + strlen (";thread:"), |
| 7006 | NULL); |
| 7007 | else |
| 7008 | event->ptid = magic_null_ptid; |
| 7009 | } |
| 7010 | |
| 7011 | if (rsa == NULL) |
| 7012 | { |
| 7013 | inferior *inf = (event->ptid == null_ptid |
| 7014 | ? NULL |
| 7015 | : find_inferior_ptid (event->ptid)); |
| 7016 | /* If this is the first time we learn anything |
| 7017 | about this process, skip the registers |
| 7018 | included in this packet, since we don't yet |
| 7019 | know which architecture to use to parse them. |
| 7020 | We'll determine the architecture later when |
| 7021 | we process the stop reply and retrieve the |
| 7022 | target description, via |
| 7023 | remote_notice_new_inferior -> |
| 7024 | post_create_inferior. */ |
| 7025 | if (inf == NULL) |
| 7026 | { |
| 7027 | p = strchrnul (p1 + 1, ';'); |
| 7028 | p++; |
| 7029 | continue; |
| 7030 | } |
| 7031 | |
| 7032 | event->arch = inf->gdbarch; |
| 7033 | rsa = get_remote_arch_state (event->arch); |
| 7034 | } |
| 7035 | |
| 7036 | packet_reg *reg |
| 7037 | = packet_reg_from_pnum (event->arch, rsa, pnum); |
| 7038 | cached_reg_t cached_reg; |
| 7039 | |
| 7040 | if (reg == NULL) |
| 7041 | error (_("Remote sent bad register number %s: %s\n\ |
| 7042 | Packet: '%s'\n"), |
| 7043 | hex_string (pnum), p, buf); |
| 7044 | |
| 7045 | cached_reg.num = reg->regnum; |
| 7046 | cached_reg.data = (gdb_byte *) |
| 7047 | xmalloc (register_size (event->arch, reg->regnum)); |
| 7048 | |
| 7049 | p = p1 + 1; |
| 7050 | fieldsize = hex2bin (p, cached_reg.data, |
| 7051 | register_size (event->arch, reg->regnum)); |
| 7052 | p += 2 * fieldsize; |
| 7053 | if (fieldsize < register_size (event->arch, reg->regnum)) |
| 7054 | warning (_("Remote reply is too short: %s"), buf); |
| 7055 | |
| 7056 | VEC_safe_push (cached_reg_t, event->regcache, &cached_reg); |
| 7057 | } |
| 7058 | else |
| 7059 | { |
| 7060 | /* Not a number. Silently skip unknown optional |
| 7061 | info. */ |
| 7062 | p = strchrnul (p1 + 1, ';'); |
| 7063 | } |
| 7064 | } |
| 7065 | |
| 7066 | if (*p != ';') |
| 7067 | error (_("Remote register badly formatted: %s\nhere: %s"), |
| 7068 | buf, p); |
| 7069 | ++p; |
| 7070 | } |
| 7071 | |
| 7072 | if (event->ws.kind != TARGET_WAITKIND_IGNORE) |
| 7073 | break; |
| 7074 | |
| 7075 | /* fall through */ |
| 7076 | case 'S': /* Old style status, just signal only. */ |
| 7077 | { |
| 7078 | int sig; |
| 7079 | |
| 7080 | event->ws.kind = TARGET_WAITKIND_STOPPED; |
| 7081 | sig = (fromhex (buf[1]) << 4) + fromhex (buf[2]); |
| 7082 | if (GDB_SIGNAL_FIRST <= sig && sig < GDB_SIGNAL_LAST) |
| 7083 | event->ws.value.sig = (enum gdb_signal) sig; |
| 7084 | else |
| 7085 | event->ws.value.sig = GDB_SIGNAL_UNKNOWN; |
| 7086 | } |
| 7087 | break; |
| 7088 | case 'w': /* Thread exited. */ |
| 7089 | { |
| 7090 | const char *p; |
| 7091 | ULONGEST value; |
| 7092 | |
| 7093 | event->ws.kind = TARGET_WAITKIND_THREAD_EXITED; |
| 7094 | p = unpack_varlen_hex (&buf[1], &value); |
| 7095 | event->ws.value.integer = value; |
| 7096 | if (*p != ';') |
| 7097 | error (_("stop reply packet badly formatted: %s"), buf); |
| 7098 | event->ptid = read_ptid (++p, NULL); |
| 7099 | break; |
| 7100 | } |
| 7101 | case 'W': /* Target exited. */ |
| 7102 | case 'X': |
| 7103 | { |
| 7104 | const char *p; |
| 7105 | int pid; |
| 7106 | ULONGEST value; |
| 7107 | |
| 7108 | /* GDB used to accept only 2 hex chars here. Stubs should |
| 7109 | only send more if they detect GDB supports multi-process |
| 7110 | support. */ |
| 7111 | p = unpack_varlen_hex (&buf[1], &value); |
| 7112 | |
| 7113 | if (buf[0] == 'W') |
| 7114 | { |
| 7115 | /* The remote process exited. */ |
| 7116 | event->ws.kind = TARGET_WAITKIND_EXITED; |
| 7117 | event->ws.value.integer = value; |
| 7118 | } |
| 7119 | else |
| 7120 | { |
| 7121 | /* The remote process exited with a signal. */ |
| 7122 | event->ws.kind = TARGET_WAITKIND_SIGNALLED; |
| 7123 | if (GDB_SIGNAL_FIRST <= value && value < GDB_SIGNAL_LAST) |
| 7124 | event->ws.value.sig = (enum gdb_signal) value; |
| 7125 | else |
| 7126 | event->ws.value.sig = GDB_SIGNAL_UNKNOWN; |
| 7127 | } |
| 7128 | |
| 7129 | /* If no process is specified, assume inferior_ptid. */ |
| 7130 | pid = ptid_get_pid (inferior_ptid); |
| 7131 | if (*p == '\0') |
| 7132 | ; |
| 7133 | else if (*p == ';') |
| 7134 | { |
| 7135 | p++; |
| 7136 | |
| 7137 | if (*p == '\0') |
| 7138 | ; |
| 7139 | else if (startswith (p, "process:")) |
| 7140 | { |
| 7141 | ULONGEST upid; |
| 7142 | |
| 7143 | p += sizeof ("process:") - 1; |
| 7144 | unpack_varlen_hex (p, &upid); |
| 7145 | pid = upid; |
| 7146 | } |
| 7147 | else |
| 7148 | error (_("unknown stop reply packet: %s"), buf); |
| 7149 | } |
| 7150 | else |
| 7151 | error (_("unknown stop reply packet: %s"), buf); |
| 7152 | event->ptid = pid_to_ptid (pid); |
| 7153 | } |
| 7154 | break; |
| 7155 | case 'N': |
| 7156 | event->ws.kind = TARGET_WAITKIND_NO_RESUMED; |
| 7157 | event->ptid = minus_one_ptid; |
| 7158 | break; |
| 7159 | } |
| 7160 | |
| 7161 | if (target_is_non_stop_p () && ptid_equal (event->ptid, null_ptid)) |
| 7162 | error (_("No process or thread specified in stop reply: %s"), buf); |
| 7163 | } |
| 7164 | |
| 7165 | /* When the stub wants to tell GDB about a new notification reply, it |
| 7166 | sends a notification (%Stop, for example). Those can come it at |
| 7167 | any time, hence, we have to make sure that any pending |
| 7168 | putpkt/getpkt sequence we're making is finished, before querying |
| 7169 | the stub for more events with the corresponding ack command |
| 7170 | (vStopped, for example). E.g., if we started a vStopped sequence |
| 7171 | immediately upon receiving the notification, something like this |
| 7172 | could happen: |
| 7173 | |
| 7174 | 1.1) --> Hg 1 |
| 7175 | 1.2) <-- OK |
| 7176 | 1.3) --> g |
| 7177 | 1.4) <-- %Stop |
| 7178 | 1.5) --> vStopped |
| 7179 | 1.6) <-- (registers reply to step #1.3) |
| 7180 | |
| 7181 | Obviously, the reply in step #1.6 would be unexpected to a vStopped |
| 7182 | query. |
| 7183 | |
| 7184 | To solve this, whenever we parse a %Stop notification successfully, |
| 7185 | we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on |
| 7186 | doing whatever we were doing: |
| 7187 | |
| 7188 | 2.1) --> Hg 1 |
| 7189 | 2.2) <-- OK |
| 7190 | 2.3) --> g |
| 7191 | 2.4) <-- %Stop |
| 7192 | <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN> |
| 7193 | 2.5) <-- (registers reply to step #2.3) |
| 7194 | |
| 7195 | Eventualy after step #2.5, we return to the event loop, which |
| 7196 | notices there's an event on the |
| 7197 | REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the |
| 7198 | associated callback --- the function below. At this point, we're |
| 7199 | always safe to start a vStopped sequence. : |
| 7200 | |
| 7201 | 2.6) --> vStopped |
| 7202 | 2.7) <-- T05 thread:2 |
| 7203 | 2.8) --> vStopped |
| 7204 | 2.9) --> OK |
| 7205 | */ |
| 7206 | |
| 7207 | void |
| 7208 | remote_notif_get_pending_events (struct notif_client *nc) |
| 7209 | { |
| 7210 | struct remote_state *rs = get_remote_state (); |
| 7211 | |
| 7212 | if (rs->notif_state->pending_event[nc->id] != NULL) |
| 7213 | { |
| 7214 | if (notif_debug) |
| 7215 | fprintf_unfiltered (gdb_stdlog, |
| 7216 | "notif: process: '%s' ack pending event\n", |
| 7217 | nc->name); |
| 7218 | |
| 7219 | /* acknowledge */ |
| 7220 | nc->ack (nc, rs->buf, rs->notif_state->pending_event[nc->id]); |
| 7221 | rs->notif_state->pending_event[nc->id] = NULL; |
| 7222 | |
| 7223 | while (1) |
| 7224 | { |
| 7225 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 7226 | if (strcmp (rs->buf, "OK") == 0) |
| 7227 | break; |
| 7228 | else |
| 7229 | remote_notif_ack (nc, rs->buf); |
| 7230 | } |
| 7231 | } |
| 7232 | else |
| 7233 | { |
| 7234 | if (notif_debug) |
| 7235 | fprintf_unfiltered (gdb_stdlog, |
| 7236 | "notif: process: '%s' no pending reply\n", |
| 7237 | nc->name); |
| 7238 | } |
| 7239 | } |
| 7240 | |
| 7241 | /* Called when it is decided that STOP_REPLY holds the info of the |
| 7242 | event that is to be returned to the core. This function always |
| 7243 | destroys STOP_REPLY. */ |
| 7244 | |
| 7245 | static ptid_t |
| 7246 | process_stop_reply (struct stop_reply *stop_reply, |
| 7247 | struct target_waitstatus *status) |
| 7248 | { |
| 7249 | ptid_t ptid; |
| 7250 | |
| 7251 | *status = stop_reply->ws; |
| 7252 | ptid = stop_reply->ptid; |
| 7253 | |
| 7254 | /* If no thread/process was reported by the stub, assume the current |
| 7255 | inferior. */ |
| 7256 | if (ptid_equal (ptid, null_ptid)) |
| 7257 | ptid = inferior_ptid; |
| 7258 | |
| 7259 | if (status->kind != TARGET_WAITKIND_EXITED |
| 7260 | && status->kind != TARGET_WAITKIND_SIGNALLED |
| 7261 | && status->kind != TARGET_WAITKIND_NO_RESUMED) |
| 7262 | { |
| 7263 | struct private_thread_info *remote_thr; |
| 7264 | |
| 7265 | /* Expedited registers. */ |
| 7266 | if (stop_reply->regcache) |
| 7267 | { |
| 7268 | struct regcache *regcache |
| 7269 | = get_thread_arch_regcache (ptid, stop_reply->arch); |
| 7270 | cached_reg_t *reg; |
| 7271 | int ix; |
| 7272 | |
| 7273 | for (ix = 0; |
| 7274 | VEC_iterate (cached_reg_t, stop_reply->regcache, ix, reg); |
| 7275 | ix++) |
| 7276 | { |
| 7277 | regcache_raw_supply (regcache, reg->num, reg->data); |
| 7278 | xfree (reg->data); |
| 7279 | } |
| 7280 | |
| 7281 | VEC_free (cached_reg_t, stop_reply->regcache); |
| 7282 | } |
| 7283 | |
| 7284 | remote_notice_new_inferior (ptid, 0); |
| 7285 | remote_thr = get_private_info_ptid (ptid); |
| 7286 | remote_thr->core = stop_reply->core; |
| 7287 | remote_thr->stop_reason = stop_reply->stop_reason; |
| 7288 | remote_thr->watch_data_address = stop_reply->watch_data_address; |
| 7289 | remote_thr->vcont_resumed = 0; |
| 7290 | } |
| 7291 | |
| 7292 | stop_reply_xfree (stop_reply); |
| 7293 | return ptid; |
| 7294 | } |
| 7295 | |
| 7296 | /* The non-stop mode version of target_wait. */ |
| 7297 | |
| 7298 | static ptid_t |
| 7299 | remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options) |
| 7300 | { |
| 7301 | struct remote_state *rs = get_remote_state (); |
| 7302 | struct stop_reply *stop_reply; |
| 7303 | int ret; |
| 7304 | int is_notif = 0; |
| 7305 | |
| 7306 | /* If in non-stop mode, get out of getpkt even if a |
| 7307 | notification is received. */ |
| 7308 | |
| 7309 | ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size, |
| 7310 | 0 /* forever */, &is_notif); |
| 7311 | while (1) |
| 7312 | { |
| 7313 | if (ret != -1 && !is_notif) |
| 7314 | switch (rs->buf[0]) |
| 7315 | { |
| 7316 | case 'E': /* Error of some sort. */ |
| 7317 | /* We're out of sync with the target now. Did it continue |
| 7318 | or not? We can't tell which thread it was in non-stop, |
| 7319 | so just ignore this. */ |
| 7320 | warning (_("Remote failure reply: %s"), rs->buf); |
| 7321 | break; |
| 7322 | case 'O': /* Console output. */ |
| 7323 | remote_console_output (rs->buf + 1); |
| 7324 | break; |
| 7325 | default: |
| 7326 | warning (_("Invalid remote reply: %s"), rs->buf); |
| 7327 | break; |
| 7328 | } |
| 7329 | |
| 7330 | /* Acknowledge a pending stop reply that may have arrived in the |
| 7331 | mean time. */ |
| 7332 | if (rs->notif_state->pending_event[notif_client_stop.id] != NULL) |
| 7333 | remote_notif_get_pending_events (¬if_client_stop); |
| 7334 | |
| 7335 | /* If indeed we noticed a stop reply, we're done. */ |
| 7336 | stop_reply = queued_stop_reply (ptid); |
| 7337 | if (stop_reply != NULL) |
| 7338 | return process_stop_reply (stop_reply, status); |
| 7339 | |
| 7340 | /* Still no event. If we're just polling for an event, then |
| 7341 | return to the event loop. */ |
| 7342 | if (options & TARGET_WNOHANG) |
| 7343 | { |
| 7344 | status->kind = TARGET_WAITKIND_IGNORE; |
| 7345 | return minus_one_ptid; |
| 7346 | } |
| 7347 | |
| 7348 | /* Otherwise do a blocking wait. */ |
| 7349 | ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size, |
| 7350 | 1 /* forever */, &is_notif); |
| 7351 | } |
| 7352 | } |
| 7353 | |
| 7354 | /* Wait until the remote machine stops, then return, storing status in |
| 7355 | STATUS just as `wait' would. */ |
| 7356 | |
| 7357 | static ptid_t |
| 7358 | remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options) |
| 7359 | { |
| 7360 | struct remote_state *rs = get_remote_state (); |
| 7361 | ptid_t event_ptid = null_ptid; |
| 7362 | char *buf; |
| 7363 | struct stop_reply *stop_reply; |
| 7364 | |
| 7365 | again: |
| 7366 | |
| 7367 | status->kind = TARGET_WAITKIND_IGNORE; |
| 7368 | status->value.integer = 0; |
| 7369 | |
| 7370 | stop_reply = queued_stop_reply (ptid); |
| 7371 | if (stop_reply != NULL) |
| 7372 | return process_stop_reply (stop_reply, status); |
| 7373 | |
| 7374 | if (rs->cached_wait_status) |
| 7375 | /* Use the cached wait status, but only once. */ |
| 7376 | rs->cached_wait_status = 0; |
| 7377 | else |
| 7378 | { |
| 7379 | int ret; |
| 7380 | int is_notif; |
| 7381 | int forever = ((options & TARGET_WNOHANG) == 0 |
| 7382 | && wait_forever_enabled_p); |
| 7383 | |
| 7384 | if (!rs->waiting_for_stop_reply) |
| 7385 | { |
| 7386 | status->kind = TARGET_WAITKIND_NO_RESUMED; |
| 7387 | return minus_one_ptid; |
| 7388 | } |
| 7389 | |
| 7390 | /* FIXME: cagney/1999-09-27: If we're in async mode we should |
| 7391 | _never_ wait for ever -> test on target_is_async_p(). |
| 7392 | However, before we do that we need to ensure that the caller |
| 7393 | knows how to take the target into/out of async mode. */ |
| 7394 | ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size, |
| 7395 | forever, &is_notif); |
| 7396 | |
| 7397 | /* GDB gets a notification. Return to core as this event is |
| 7398 | not interesting. */ |
| 7399 | if (ret != -1 && is_notif) |
| 7400 | return minus_one_ptid; |
| 7401 | |
| 7402 | if (ret == -1 && (options & TARGET_WNOHANG) != 0) |
| 7403 | return minus_one_ptid; |
| 7404 | } |
| 7405 | |
| 7406 | buf = rs->buf; |
| 7407 | |
| 7408 | /* Assume that the target has acknowledged Ctrl-C unless we receive |
| 7409 | an 'F' or 'O' packet. */ |
| 7410 | if (buf[0] != 'F' && buf[0] != 'O') |
| 7411 | rs->ctrlc_pending_p = 0; |
| 7412 | |
| 7413 | switch (buf[0]) |
| 7414 | { |
| 7415 | case 'E': /* Error of some sort. */ |
| 7416 | /* We're out of sync with the target now. Did it continue or |
| 7417 | not? Not is more likely, so report a stop. */ |
| 7418 | rs->waiting_for_stop_reply = 0; |
| 7419 | |
| 7420 | warning (_("Remote failure reply: %s"), buf); |
| 7421 | status->kind = TARGET_WAITKIND_STOPPED; |
| 7422 | status->value.sig = GDB_SIGNAL_0; |
| 7423 | break; |
| 7424 | case 'F': /* File-I/O request. */ |
| 7425 | /* GDB may access the inferior memory while handling the File-I/O |
| 7426 | request, but we don't want GDB accessing memory while waiting |
| 7427 | for a stop reply. See the comments in putpkt_binary. Set |
| 7428 | waiting_for_stop_reply to 0 temporarily. */ |
| 7429 | rs->waiting_for_stop_reply = 0; |
| 7430 | remote_fileio_request (buf, rs->ctrlc_pending_p); |
| 7431 | rs->ctrlc_pending_p = 0; |
| 7432 | /* GDB handled the File-I/O request, and the target is running |
| 7433 | again. Keep waiting for events. */ |
| 7434 | rs->waiting_for_stop_reply = 1; |
| 7435 | break; |
| 7436 | case 'N': case 'T': case 'S': case 'X': case 'W': |
| 7437 | { |
| 7438 | struct stop_reply *stop_reply; |
| 7439 | |
| 7440 | /* There is a stop reply to handle. */ |
| 7441 | rs->waiting_for_stop_reply = 0; |
| 7442 | |
| 7443 | stop_reply |
| 7444 | = (struct stop_reply *) remote_notif_parse (¬if_client_stop, |
| 7445 | rs->buf); |
| 7446 | |
| 7447 | event_ptid = process_stop_reply (stop_reply, status); |
| 7448 | break; |
| 7449 | } |
| 7450 | case 'O': /* Console output. */ |
| 7451 | remote_console_output (buf + 1); |
| 7452 | break; |
| 7453 | case '\0': |
| 7454 | if (rs->last_sent_signal != GDB_SIGNAL_0) |
| 7455 | { |
| 7456 | /* Zero length reply means that we tried 'S' or 'C' and the |
| 7457 | remote system doesn't support it. */ |
| 7458 | target_terminal::ours_for_output (); |
| 7459 | printf_filtered |
| 7460 | ("Can't send signals to this remote system. %s not sent.\n", |
| 7461 | gdb_signal_to_name (rs->last_sent_signal)); |
| 7462 | rs->last_sent_signal = GDB_SIGNAL_0; |
| 7463 | target_terminal::inferior (); |
| 7464 | |
| 7465 | strcpy (buf, rs->last_sent_step ? "s" : "c"); |
| 7466 | putpkt (buf); |
| 7467 | break; |
| 7468 | } |
| 7469 | /* else fallthrough */ |
| 7470 | default: |
| 7471 | warning (_("Invalid remote reply: %s"), buf); |
| 7472 | break; |
| 7473 | } |
| 7474 | |
| 7475 | if (status->kind == TARGET_WAITKIND_NO_RESUMED) |
| 7476 | return minus_one_ptid; |
| 7477 | else if (status->kind == TARGET_WAITKIND_IGNORE) |
| 7478 | { |
| 7479 | /* Nothing interesting happened. If we're doing a non-blocking |
| 7480 | poll, we're done. Otherwise, go back to waiting. */ |
| 7481 | if (options & TARGET_WNOHANG) |
| 7482 | return minus_one_ptid; |
| 7483 | else |
| 7484 | goto again; |
| 7485 | } |
| 7486 | else if (status->kind != TARGET_WAITKIND_EXITED |
| 7487 | && status->kind != TARGET_WAITKIND_SIGNALLED) |
| 7488 | { |
| 7489 | if (!ptid_equal (event_ptid, null_ptid)) |
| 7490 | record_currthread (rs, event_ptid); |
| 7491 | else |
| 7492 | event_ptid = inferior_ptid; |
| 7493 | } |
| 7494 | else |
| 7495 | /* A process exit. Invalidate our notion of current thread. */ |
| 7496 | record_currthread (rs, minus_one_ptid); |
| 7497 | |
| 7498 | return event_ptid; |
| 7499 | } |
| 7500 | |
| 7501 | /* Wait until the remote machine stops, then return, storing status in |
| 7502 | STATUS just as `wait' would. */ |
| 7503 | |
| 7504 | static ptid_t |
| 7505 | remote_wait (struct target_ops *ops, |
| 7506 | ptid_t ptid, struct target_waitstatus *status, int options) |
| 7507 | { |
| 7508 | ptid_t event_ptid; |
| 7509 | |
| 7510 | if (target_is_non_stop_p ()) |
| 7511 | event_ptid = remote_wait_ns (ptid, status, options); |
| 7512 | else |
| 7513 | event_ptid = remote_wait_as (ptid, status, options); |
| 7514 | |
| 7515 | if (target_is_async_p ()) |
| 7516 | { |
| 7517 | /* If there are are events left in the queue tell the event loop |
| 7518 | to return here. */ |
| 7519 | if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue)) |
| 7520 | mark_async_event_handler (remote_async_inferior_event_token); |
| 7521 | } |
| 7522 | |
| 7523 | return event_ptid; |
| 7524 | } |
| 7525 | |
| 7526 | /* Fetch a single register using a 'p' packet. */ |
| 7527 | |
| 7528 | static int |
| 7529 | fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg) |
| 7530 | { |
| 7531 | struct gdbarch *gdbarch = regcache->arch (); |
| 7532 | struct remote_state *rs = get_remote_state (); |
| 7533 | char *buf, *p; |
| 7534 | gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum)); |
| 7535 | int i; |
| 7536 | |
| 7537 | if (packet_support (PACKET_p) == PACKET_DISABLE) |
| 7538 | return 0; |
| 7539 | |
| 7540 | if (reg->pnum == -1) |
| 7541 | return 0; |
| 7542 | |
| 7543 | p = rs->buf; |
| 7544 | *p++ = 'p'; |
| 7545 | p += hexnumstr (p, reg->pnum); |
| 7546 | *p++ = '\0'; |
| 7547 | putpkt (rs->buf); |
| 7548 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 7549 | |
| 7550 | buf = rs->buf; |
| 7551 | |
| 7552 | switch (packet_ok (buf, &remote_protocol_packets[PACKET_p])) |
| 7553 | { |
| 7554 | case PACKET_OK: |
| 7555 | break; |
| 7556 | case PACKET_UNKNOWN: |
| 7557 | return 0; |
| 7558 | case PACKET_ERROR: |
| 7559 | error (_("Could not fetch register \"%s\"; remote failure reply '%s'"), |
| 7560 | gdbarch_register_name (regcache->arch (), |
| 7561 | reg->regnum), |
| 7562 | buf); |
| 7563 | } |
| 7564 | |
| 7565 | /* If this register is unfetchable, tell the regcache. */ |
| 7566 | if (buf[0] == 'x') |
| 7567 | { |
| 7568 | regcache_raw_supply (regcache, reg->regnum, NULL); |
| 7569 | return 1; |
| 7570 | } |
| 7571 | |
| 7572 | /* Otherwise, parse and supply the value. */ |
| 7573 | p = buf; |
| 7574 | i = 0; |
| 7575 | while (p[0] != 0) |
| 7576 | { |
| 7577 | if (p[1] == 0) |
| 7578 | error (_("fetch_register_using_p: early buf termination")); |
| 7579 | |
| 7580 | regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]); |
| 7581 | p += 2; |
| 7582 | } |
| 7583 | regcache_raw_supply (regcache, reg->regnum, regp); |
| 7584 | return 1; |
| 7585 | } |
| 7586 | |
| 7587 | /* Fetch the registers included in the target's 'g' packet. */ |
| 7588 | |
| 7589 | static int |
| 7590 | send_g_packet (void) |
| 7591 | { |
| 7592 | struct remote_state *rs = get_remote_state (); |
| 7593 | int buf_len; |
| 7594 | |
| 7595 | xsnprintf (rs->buf, get_remote_packet_size (), "g"); |
| 7596 | remote_send (&rs->buf, &rs->buf_size); |
| 7597 | |
| 7598 | /* We can get out of synch in various cases. If the first character |
| 7599 | in the buffer is not a hex character, assume that has happened |
| 7600 | and try to fetch another packet to read. */ |
| 7601 | while ((rs->buf[0] < '0' || rs->buf[0] > '9') |
| 7602 | && (rs->buf[0] < 'A' || rs->buf[0] > 'F') |
| 7603 | && (rs->buf[0] < 'a' || rs->buf[0] > 'f') |
| 7604 | && rs->buf[0] != 'x') /* New: unavailable register value. */ |
| 7605 | { |
| 7606 | if (remote_debug) |
| 7607 | fprintf_unfiltered (gdb_stdlog, |
| 7608 | "Bad register packet; fetching a new packet\n"); |
| 7609 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 7610 | } |
| 7611 | |
| 7612 | buf_len = strlen (rs->buf); |
| 7613 | |
| 7614 | /* Sanity check the received packet. */ |
| 7615 | if (buf_len % 2 != 0) |
| 7616 | error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf); |
| 7617 | |
| 7618 | return buf_len / 2; |
| 7619 | } |
| 7620 | |
| 7621 | static void |
| 7622 | process_g_packet (struct regcache *regcache) |
| 7623 | { |
| 7624 | struct gdbarch *gdbarch = regcache->arch (); |
| 7625 | struct remote_state *rs = get_remote_state (); |
| 7626 | remote_arch_state *rsa = get_remote_arch_state (gdbarch); |
| 7627 | int i, buf_len; |
| 7628 | char *p; |
| 7629 | char *regs; |
| 7630 | |
| 7631 | buf_len = strlen (rs->buf); |
| 7632 | |
| 7633 | /* Further sanity checks, with knowledge of the architecture. */ |
| 7634 | if (buf_len > 2 * rsa->sizeof_g_packet) |
| 7635 | error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d " |
| 7636 | "bytes): %s"), rsa->sizeof_g_packet, buf_len / 2, rs->buf); |
| 7637 | |
| 7638 | /* Save the size of the packet sent to us by the target. It is used |
| 7639 | as a heuristic when determining the max size of packets that the |
| 7640 | target can safely receive. */ |
| 7641 | if (rsa->actual_register_packet_size == 0) |
| 7642 | rsa->actual_register_packet_size = buf_len; |
| 7643 | |
| 7644 | /* If this is smaller than we guessed the 'g' packet would be, |
| 7645 | update our records. A 'g' reply that doesn't include a register's |
| 7646 | value implies either that the register is not available, or that |
| 7647 | the 'p' packet must be used. */ |
| 7648 | if (buf_len < 2 * rsa->sizeof_g_packet) |
| 7649 | { |
| 7650 | long sizeof_g_packet = buf_len / 2; |
| 7651 | |
| 7652 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
| 7653 | { |
| 7654 | long offset = rsa->regs[i].offset; |
| 7655 | long reg_size = register_size (gdbarch, i); |
| 7656 | |
| 7657 | if (rsa->regs[i].pnum == -1) |
| 7658 | continue; |
| 7659 | |
| 7660 | if (offset >= sizeof_g_packet) |
| 7661 | rsa->regs[i].in_g_packet = 0; |
| 7662 | else if (offset + reg_size > sizeof_g_packet) |
| 7663 | error (_("Truncated register %d in remote 'g' packet"), i); |
| 7664 | else |
| 7665 | rsa->regs[i].in_g_packet = 1; |
| 7666 | } |
| 7667 | |
| 7668 | /* Looks valid enough, we can assume this is the correct length |
| 7669 | for a 'g' packet. It's important not to adjust |
| 7670 | rsa->sizeof_g_packet if we have truncated registers otherwise |
| 7671 | this "if" won't be run the next time the method is called |
| 7672 | with a packet of the same size and one of the internal errors |
| 7673 | below will trigger instead. */ |
| 7674 | rsa->sizeof_g_packet = sizeof_g_packet; |
| 7675 | } |
| 7676 | |
| 7677 | regs = (char *) alloca (rsa->sizeof_g_packet); |
| 7678 | |
| 7679 | /* Unimplemented registers read as all bits zero. */ |
| 7680 | memset (regs, 0, rsa->sizeof_g_packet); |
| 7681 | |
| 7682 | /* Reply describes registers byte by byte, each byte encoded as two |
| 7683 | hex characters. Suck them all up, then supply them to the |
| 7684 | register cacheing/storage mechanism. */ |
| 7685 | |
| 7686 | p = rs->buf; |
| 7687 | for (i = 0; i < rsa->sizeof_g_packet; i++) |
| 7688 | { |
| 7689 | if (p[0] == 0 || p[1] == 0) |
| 7690 | /* This shouldn't happen - we adjusted sizeof_g_packet above. */ |
| 7691 | internal_error (__FILE__, __LINE__, |
| 7692 | _("unexpected end of 'g' packet reply")); |
| 7693 | |
| 7694 | if (p[0] == 'x' && p[1] == 'x') |
| 7695 | regs[i] = 0; /* 'x' */ |
| 7696 | else |
| 7697 | regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); |
| 7698 | p += 2; |
| 7699 | } |
| 7700 | |
| 7701 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
| 7702 | { |
| 7703 | struct packet_reg *r = &rsa->regs[i]; |
| 7704 | long reg_size = register_size (gdbarch, i); |
| 7705 | |
| 7706 | if (r->in_g_packet) |
| 7707 | { |
| 7708 | if ((r->offset + reg_size) * 2 > strlen (rs->buf)) |
| 7709 | /* This shouldn't happen - we adjusted in_g_packet above. */ |
| 7710 | internal_error (__FILE__, __LINE__, |
| 7711 | _("unexpected end of 'g' packet reply")); |
| 7712 | else if (rs->buf[r->offset * 2] == 'x') |
| 7713 | { |
| 7714 | gdb_assert (r->offset * 2 < strlen (rs->buf)); |
| 7715 | /* The register isn't available, mark it as such (at |
| 7716 | the same time setting the value to zero). */ |
| 7717 | regcache_raw_supply (regcache, r->regnum, NULL); |
| 7718 | } |
| 7719 | else |
| 7720 | regcache_raw_supply (regcache, r->regnum, |
| 7721 | regs + r->offset); |
| 7722 | } |
| 7723 | } |
| 7724 | } |
| 7725 | |
| 7726 | static void |
| 7727 | fetch_registers_using_g (struct regcache *regcache) |
| 7728 | { |
| 7729 | send_g_packet (); |
| 7730 | process_g_packet (regcache); |
| 7731 | } |
| 7732 | |
| 7733 | /* Make the remote selected traceframe match GDB's selected |
| 7734 | traceframe. */ |
| 7735 | |
| 7736 | static void |
| 7737 | set_remote_traceframe (void) |
| 7738 | { |
| 7739 | int newnum; |
| 7740 | struct remote_state *rs = get_remote_state (); |
| 7741 | |
| 7742 | if (rs->remote_traceframe_number == get_traceframe_number ()) |
| 7743 | return; |
| 7744 | |
| 7745 | /* Avoid recursion, remote_trace_find calls us again. */ |
| 7746 | rs->remote_traceframe_number = get_traceframe_number (); |
| 7747 | |
| 7748 | newnum = target_trace_find (tfind_number, |
| 7749 | get_traceframe_number (), 0, 0, NULL); |
| 7750 | |
| 7751 | /* Should not happen. If it does, all bets are off. */ |
| 7752 | if (newnum != get_traceframe_number ()) |
| 7753 | warning (_("could not set remote traceframe")); |
| 7754 | } |
| 7755 | |
| 7756 | static void |
| 7757 | remote_fetch_registers (struct target_ops *ops, |
| 7758 | struct regcache *regcache, int regnum) |
| 7759 | { |
| 7760 | struct gdbarch *gdbarch = regcache->arch (); |
| 7761 | remote_arch_state *rsa = get_remote_arch_state (gdbarch); |
| 7762 | int i; |
| 7763 | |
| 7764 | set_remote_traceframe (); |
| 7765 | set_general_thread (regcache_get_ptid (regcache)); |
| 7766 | |
| 7767 | if (regnum >= 0) |
| 7768 | { |
| 7769 | packet_reg *reg = packet_reg_from_regnum (gdbarch, rsa, regnum); |
| 7770 | |
| 7771 | gdb_assert (reg != NULL); |
| 7772 | |
| 7773 | /* If this register might be in the 'g' packet, try that first - |
| 7774 | we are likely to read more than one register. If this is the |
| 7775 | first 'g' packet, we might be overly optimistic about its |
| 7776 | contents, so fall back to 'p'. */ |
| 7777 | if (reg->in_g_packet) |
| 7778 | { |
| 7779 | fetch_registers_using_g (regcache); |
| 7780 | if (reg->in_g_packet) |
| 7781 | return; |
| 7782 | } |
| 7783 | |
| 7784 | if (fetch_register_using_p (regcache, reg)) |
| 7785 | return; |
| 7786 | |
| 7787 | /* This register is not available. */ |
| 7788 | regcache_raw_supply (regcache, reg->regnum, NULL); |
| 7789 | |
| 7790 | return; |
| 7791 | } |
| 7792 | |
| 7793 | fetch_registers_using_g (regcache); |
| 7794 | |
| 7795 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
| 7796 | if (!rsa->regs[i].in_g_packet) |
| 7797 | if (!fetch_register_using_p (regcache, &rsa->regs[i])) |
| 7798 | { |
| 7799 | /* This register is not available. */ |
| 7800 | regcache_raw_supply (regcache, i, NULL); |
| 7801 | } |
| 7802 | } |
| 7803 | |
| 7804 | /* Prepare to store registers. Since we may send them all (using a |
| 7805 | 'G' request), we have to read out the ones we don't want to change |
| 7806 | first. */ |
| 7807 | |
| 7808 | static void |
| 7809 | remote_prepare_to_store (struct target_ops *self, struct regcache *regcache) |
| 7810 | { |
| 7811 | remote_arch_state *rsa = get_remote_arch_state (regcache->arch ()); |
| 7812 | int i; |
| 7813 | |
| 7814 | /* Make sure the entire registers array is valid. */ |
| 7815 | switch (packet_support (PACKET_P)) |
| 7816 | { |
| 7817 | case PACKET_DISABLE: |
| 7818 | case PACKET_SUPPORT_UNKNOWN: |
| 7819 | /* Make sure all the necessary registers are cached. */ |
| 7820 | for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++) |
| 7821 | if (rsa->regs[i].in_g_packet) |
| 7822 | regcache_raw_update (regcache, rsa->regs[i].regnum); |
| 7823 | break; |
| 7824 | case PACKET_ENABLE: |
| 7825 | break; |
| 7826 | } |
| 7827 | } |
| 7828 | |
| 7829 | /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF |
| 7830 | packet was not recognized. */ |
| 7831 | |
| 7832 | static int |
| 7833 | store_register_using_P (const struct regcache *regcache, |
| 7834 | struct packet_reg *reg) |
| 7835 | { |
| 7836 | struct gdbarch *gdbarch = regcache->arch (); |
| 7837 | struct remote_state *rs = get_remote_state (); |
| 7838 | /* Try storing a single register. */ |
| 7839 | char *buf = rs->buf; |
| 7840 | gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum)); |
| 7841 | char *p; |
| 7842 | |
| 7843 | if (packet_support (PACKET_P) == PACKET_DISABLE) |
| 7844 | return 0; |
| 7845 | |
| 7846 | if (reg->pnum == -1) |
| 7847 | return 0; |
| 7848 | |
| 7849 | xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0)); |
| 7850 | p = buf + strlen (buf); |
| 7851 | regcache_raw_collect (regcache, reg->regnum, regp); |
| 7852 | bin2hex (regp, p, register_size (gdbarch, reg->regnum)); |
| 7853 | putpkt (rs->buf); |
| 7854 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 7855 | |
| 7856 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P])) |
| 7857 | { |
| 7858 | case PACKET_OK: |
| 7859 | return 1; |
| 7860 | case PACKET_ERROR: |
| 7861 | error (_("Could not write register \"%s\"; remote failure reply '%s'"), |
| 7862 | gdbarch_register_name (gdbarch, reg->regnum), rs->buf); |
| 7863 | case PACKET_UNKNOWN: |
| 7864 | return 0; |
| 7865 | default: |
| 7866 | internal_error (__FILE__, __LINE__, _("Bad result from packet_ok")); |
| 7867 | } |
| 7868 | } |
| 7869 | |
| 7870 | /* Store register REGNUM, or all registers if REGNUM == -1, from the |
| 7871 | contents of the register cache buffer. FIXME: ignores errors. */ |
| 7872 | |
| 7873 | static void |
| 7874 | store_registers_using_G (const struct regcache *regcache) |
| 7875 | { |
| 7876 | struct remote_state *rs = get_remote_state (); |
| 7877 | remote_arch_state *rsa = get_remote_arch_state (regcache->arch ()); |
| 7878 | gdb_byte *regs; |
| 7879 | char *p; |
| 7880 | |
| 7881 | /* Extract all the registers in the regcache copying them into a |
| 7882 | local buffer. */ |
| 7883 | { |
| 7884 | int i; |
| 7885 | |
| 7886 | regs = (gdb_byte *) alloca (rsa->sizeof_g_packet); |
| 7887 | memset (regs, 0, rsa->sizeof_g_packet); |
| 7888 | for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++) |
| 7889 | { |
| 7890 | struct packet_reg *r = &rsa->regs[i]; |
| 7891 | |
| 7892 | if (r->in_g_packet) |
| 7893 | regcache_raw_collect (regcache, r->regnum, regs + r->offset); |
| 7894 | } |
| 7895 | } |
| 7896 | |
| 7897 | /* Command describes registers byte by byte, |
| 7898 | each byte encoded as two hex characters. */ |
| 7899 | p = rs->buf; |
| 7900 | *p++ = 'G'; |
| 7901 | bin2hex (regs, p, rsa->sizeof_g_packet); |
| 7902 | putpkt (rs->buf); |
| 7903 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 7904 | if (packet_check_result (rs->buf) == PACKET_ERROR) |
| 7905 | error (_("Could not write registers; remote failure reply '%s'"), |
| 7906 | rs->buf); |
| 7907 | } |
| 7908 | |
| 7909 | /* Store register REGNUM, or all registers if REGNUM == -1, from the contents |
| 7910 | of the register cache buffer. FIXME: ignores errors. */ |
| 7911 | |
| 7912 | static void |
| 7913 | remote_store_registers (struct target_ops *ops, |
| 7914 | struct regcache *regcache, int regnum) |
| 7915 | { |
| 7916 | struct gdbarch *gdbarch = regcache->arch (); |
| 7917 | remote_arch_state *rsa = get_remote_arch_state (gdbarch); |
| 7918 | int i; |
| 7919 | |
| 7920 | set_remote_traceframe (); |
| 7921 | set_general_thread (regcache_get_ptid (regcache)); |
| 7922 | |
| 7923 | if (regnum >= 0) |
| 7924 | { |
| 7925 | packet_reg *reg = packet_reg_from_regnum (gdbarch, rsa, regnum); |
| 7926 | |
| 7927 | gdb_assert (reg != NULL); |
| 7928 | |
| 7929 | /* Always prefer to store registers using the 'P' packet if |
| 7930 | possible; we often change only a small number of registers. |
| 7931 | Sometimes we change a larger number; we'd need help from a |
| 7932 | higher layer to know to use 'G'. */ |
| 7933 | if (store_register_using_P (regcache, reg)) |
| 7934 | return; |
| 7935 | |
| 7936 | /* For now, don't complain if we have no way to write the |
| 7937 | register. GDB loses track of unavailable registers too |
| 7938 | easily. Some day, this may be an error. We don't have |
| 7939 | any way to read the register, either... */ |
| 7940 | if (!reg->in_g_packet) |
| 7941 | return; |
| 7942 | |
| 7943 | store_registers_using_G (regcache); |
| 7944 | return; |
| 7945 | } |
| 7946 | |
| 7947 | store_registers_using_G (regcache); |
| 7948 | |
| 7949 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
| 7950 | if (!rsa->regs[i].in_g_packet) |
| 7951 | if (!store_register_using_P (regcache, &rsa->regs[i])) |
| 7952 | /* See above for why we do not issue an error here. */ |
| 7953 | continue; |
| 7954 | } |
| 7955 | \f |
| 7956 | |
| 7957 | /* Return the number of hex digits in num. */ |
| 7958 | |
| 7959 | static int |
| 7960 | hexnumlen (ULONGEST num) |
| 7961 | { |
| 7962 | int i; |
| 7963 | |
| 7964 | for (i = 0; num != 0; i++) |
| 7965 | num >>= 4; |
| 7966 | |
| 7967 | return std::max (i, 1); |
| 7968 | } |
| 7969 | |
| 7970 | /* Set BUF to the minimum number of hex digits representing NUM. */ |
| 7971 | |
| 7972 | static int |
| 7973 | hexnumstr (char *buf, ULONGEST num) |
| 7974 | { |
| 7975 | int len = hexnumlen (num); |
| 7976 | |
| 7977 | return hexnumnstr (buf, num, len); |
| 7978 | } |
| 7979 | |
| 7980 | |
| 7981 | /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */ |
| 7982 | |
| 7983 | static int |
| 7984 | hexnumnstr (char *buf, ULONGEST num, int width) |
| 7985 | { |
| 7986 | int i; |
| 7987 | |
| 7988 | buf[width] = '\0'; |
| 7989 | |
| 7990 | for (i = width - 1; i >= 0; i--) |
| 7991 | { |
| 7992 | buf[i] = "0123456789abcdef"[(num & 0xf)]; |
| 7993 | num >>= 4; |
| 7994 | } |
| 7995 | |
| 7996 | return width; |
| 7997 | } |
| 7998 | |
| 7999 | /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */ |
| 8000 | |
| 8001 | static CORE_ADDR |
| 8002 | remote_address_masked (CORE_ADDR addr) |
| 8003 | { |
| 8004 | unsigned int address_size = remote_address_size; |
| 8005 | |
| 8006 | /* If "remoteaddresssize" was not set, default to target address size. */ |
| 8007 | if (!address_size) |
| 8008 | address_size = gdbarch_addr_bit (target_gdbarch ()); |
| 8009 | |
| 8010 | if (address_size > 0 |
| 8011 | && address_size < (sizeof (ULONGEST) * 8)) |
| 8012 | { |
| 8013 | /* Only create a mask when that mask can safely be constructed |
| 8014 | in a ULONGEST variable. */ |
| 8015 | ULONGEST mask = 1; |
| 8016 | |
| 8017 | mask = (mask << address_size) - 1; |
| 8018 | addr &= mask; |
| 8019 | } |
| 8020 | return addr; |
| 8021 | } |
| 8022 | |
| 8023 | /* Determine whether the remote target supports binary downloading. |
| 8024 | This is accomplished by sending a no-op memory write of zero length |
| 8025 | to the target at the specified address. It does not suffice to send |
| 8026 | the whole packet, since many stubs strip the eighth bit and |
| 8027 | subsequently compute a wrong checksum, which causes real havoc with |
| 8028 | remote_write_bytes. |
| 8029 | |
| 8030 | NOTE: This can still lose if the serial line is not eight-bit |
| 8031 | clean. In cases like this, the user should clear "remote |
| 8032 | X-packet". */ |
| 8033 | |
| 8034 | static void |
| 8035 | check_binary_download (CORE_ADDR addr) |
| 8036 | { |
| 8037 | struct remote_state *rs = get_remote_state (); |
| 8038 | |
| 8039 | switch (packet_support (PACKET_X)) |
| 8040 | { |
| 8041 | case PACKET_DISABLE: |
| 8042 | break; |
| 8043 | case PACKET_ENABLE: |
| 8044 | break; |
| 8045 | case PACKET_SUPPORT_UNKNOWN: |
| 8046 | { |
| 8047 | char *p; |
| 8048 | |
| 8049 | p = rs->buf; |
| 8050 | *p++ = 'X'; |
| 8051 | p += hexnumstr (p, (ULONGEST) addr); |
| 8052 | *p++ = ','; |
| 8053 | p += hexnumstr (p, (ULONGEST) 0); |
| 8054 | *p++ = ':'; |
| 8055 | *p = '\0'; |
| 8056 | |
| 8057 | putpkt_binary (rs->buf, (int) (p - rs->buf)); |
| 8058 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 8059 | |
| 8060 | if (rs->buf[0] == '\0') |
| 8061 | { |
| 8062 | if (remote_debug) |
| 8063 | fprintf_unfiltered (gdb_stdlog, |
| 8064 | "binary downloading NOT " |
| 8065 | "supported by target\n"); |
| 8066 | remote_protocol_packets[PACKET_X].support = PACKET_DISABLE; |
| 8067 | } |
| 8068 | else |
| 8069 | { |
| 8070 | if (remote_debug) |
| 8071 | fprintf_unfiltered (gdb_stdlog, |
| 8072 | "binary downloading supported by target\n"); |
| 8073 | remote_protocol_packets[PACKET_X].support = PACKET_ENABLE; |
| 8074 | } |
| 8075 | break; |
| 8076 | } |
| 8077 | } |
| 8078 | } |
| 8079 | |
| 8080 | /* Helper function to resize the payload in order to try to get a good |
| 8081 | alignment. We try to write an amount of data such that the next write will |
| 8082 | start on an address aligned on REMOTE_ALIGN_WRITES. */ |
| 8083 | |
| 8084 | static int |
| 8085 | align_for_efficient_write (int todo, CORE_ADDR memaddr) |
| 8086 | { |
| 8087 | return ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr; |
| 8088 | } |
| 8089 | |
| 8090 | /* Write memory data directly to the remote machine. |
| 8091 | This does not inform the data cache; the data cache uses this. |
| 8092 | HEADER is the starting part of the packet. |
| 8093 | MEMADDR is the address in the remote memory space. |
| 8094 | MYADDR is the address of the buffer in our space. |
| 8095 | LEN_UNITS is the number of addressable units to write. |
| 8096 | UNIT_SIZE is the length in bytes of an addressable unit. |
| 8097 | PACKET_FORMAT should be either 'X' or 'M', and indicates if we |
| 8098 | should send data as binary ('X'), or hex-encoded ('M'). |
| 8099 | |
| 8100 | The function creates packet of the form |
| 8101 | <HEADER><ADDRESS>,<LENGTH>:<DATA> |
| 8102 | |
| 8103 | where encoding of <DATA> is terminated by PACKET_FORMAT. |
| 8104 | |
| 8105 | If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma |
| 8106 | are omitted. |
| 8107 | |
| 8108 | Return the transferred status, error or OK (an |
| 8109 | 'enum target_xfer_status' value). Save the number of addressable units |
| 8110 | transferred in *XFERED_LEN_UNITS. Only transfer a single packet. |
| 8111 | |
| 8112 | On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an |
| 8113 | exchange between gdb and the stub could look like (?? in place of the |
| 8114 | checksum): |
| 8115 | |
| 8116 | -> $m1000,4#?? |
| 8117 | <- aaaabbbbccccdddd |
| 8118 | |
| 8119 | -> $M1000,3:eeeeffffeeee#?? |
| 8120 | <- OK |
| 8121 | |
| 8122 | -> $m1000,4#?? |
| 8123 | <- eeeeffffeeeedddd */ |
| 8124 | |
| 8125 | static enum target_xfer_status |
| 8126 | remote_write_bytes_aux (const char *header, CORE_ADDR memaddr, |
| 8127 | const gdb_byte *myaddr, ULONGEST len_units, |
| 8128 | int unit_size, ULONGEST *xfered_len_units, |
| 8129 | char packet_format, int use_length) |
| 8130 | { |
| 8131 | struct remote_state *rs = get_remote_state (); |
| 8132 | char *p; |
| 8133 | char *plen = NULL; |
| 8134 | int plenlen = 0; |
| 8135 | int todo_units; |
| 8136 | int units_written; |
| 8137 | int payload_capacity_bytes; |
| 8138 | int payload_length_bytes; |
| 8139 | |
| 8140 | if (packet_format != 'X' && packet_format != 'M') |
| 8141 | internal_error (__FILE__, __LINE__, |
| 8142 | _("remote_write_bytes_aux: bad packet format")); |
| 8143 | |
| 8144 | if (len_units == 0) |
| 8145 | return TARGET_XFER_EOF; |
| 8146 | |
| 8147 | payload_capacity_bytes = get_memory_write_packet_size (); |
| 8148 | |
| 8149 | /* The packet buffer will be large enough for the payload; |
| 8150 | get_memory_packet_size ensures this. */ |
| 8151 | rs->buf[0] = '\0'; |
| 8152 | |
| 8153 | /* Compute the size of the actual payload by subtracting out the |
| 8154 | packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */ |
| 8155 | |
| 8156 | payload_capacity_bytes -= strlen ("$,:#NN"); |
| 8157 | if (!use_length) |
| 8158 | /* The comma won't be used. */ |
| 8159 | payload_capacity_bytes += 1; |
| 8160 | payload_capacity_bytes -= strlen (header); |
| 8161 | payload_capacity_bytes -= hexnumlen (memaddr); |
| 8162 | |
| 8163 | /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */ |
| 8164 | |
| 8165 | strcat (rs->buf, header); |
| 8166 | p = rs->buf + strlen (header); |
| 8167 | |
| 8168 | /* Compute a best guess of the number of bytes actually transfered. */ |
| 8169 | if (packet_format == 'X') |
| 8170 | { |
| 8171 | /* Best guess at number of bytes that will fit. */ |
| 8172 | todo_units = std::min (len_units, |
| 8173 | (ULONGEST) payload_capacity_bytes / unit_size); |
| 8174 | if (use_length) |
| 8175 | payload_capacity_bytes -= hexnumlen (todo_units); |
| 8176 | todo_units = std::min (todo_units, payload_capacity_bytes / unit_size); |
| 8177 | } |
| 8178 | else |
| 8179 | { |
| 8180 | /* Number of bytes that will fit. */ |
| 8181 | todo_units |
| 8182 | = std::min (len_units, |
| 8183 | (ULONGEST) (payload_capacity_bytes / unit_size) / 2); |
| 8184 | if (use_length) |
| 8185 | payload_capacity_bytes -= hexnumlen (todo_units); |
| 8186 | todo_units = std::min (todo_units, |
| 8187 | (payload_capacity_bytes / unit_size) / 2); |
| 8188 | } |
| 8189 | |
| 8190 | if (todo_units <= 0) |
| 8191 | internal_error (__FILE__, __LINE__, |
| 8192 | _("minimum packet size too small to write data")); |
| 8193 | |
| 8194 | /* If we already need another packet, then try to align the end |
| 8195 | of this packet to a useful boundary. */ |
| 8196 | if (todo_units > 2 * REMOTE_ALIGN_WRITES && todo_units < len_units) |
| 8197 | todo_units = align_for_efficient_write (todo_units, memaddr); |
| 8198 | |
| 8199 | /* Append "<memaddr>". */ |
| 8200 | memaddr = remote_address_masked (memaddr); |
| 8201 | p += hexnumstr (p, (ULONGEST) memaddr); |
| 8202 | |
| 8203 | if (use_length) |
| 8204 | { |
| 8205 | /* Append ",". */ |
| 8206 | *p++ = ','; |
| 8207 | |
| 8208 | /* Append the length and retain its location and size. It may need to be |
| 8209 | adjusted once the packet body has been created. */ |
| 8210 | plen = p; |
| 8211 | plenlen = hexnumstr (p, (ULONGEST) todo_units); |
| 8212 | p += plenlen; |
| 8213 | } |
| 8214 | |
| 8215 | /* Append ":". */ |
| 8216 | *p++ = ':'; |
| 8217 | *p = '\0'; |
| 8218 | |
| 8219 | /* Append the packet body. */ |
| 8220 | if (packet_format == 'X') |
| 8221 | { |
| 8222 | /* Binary mode. Send target system values byte by byte, in |
| 8223 | increasing byte addresses. Only escape certain critical |
| 8224 | characters. */ |
| 8225 | payload_length_bytes = |
| 8226 | remote_escape_output (myaddr, todo_units, unit_size, (gdb_byte *) p, |
| 8227 | &units_written, payload_capacity_bytes); |
| 8228 | |
| 8229 | /* If not all TODO units fit, then we'll need another packet. Make |
| 8230 | a second try to keep the end of the packet aligned. Don't do |
| 8231 | this if the packet is tiny. */ |
| 8232 | if (units_written < todo_units && units_written > 2 * REMOTE_ALIGN_WRITES) |
| 8233 | { |
| 8234 | int new_todo_units; |
| 8235 | |
| 8236 | new_todo_units = align_for_efficient_write (units_written, memaddr); |
| 8237 | |
| 8238 | if (new_todo_units != units_written) |
| 8239 | payload_length_bytes = |
| 8240 | remote_escape_output (myaddr, new_todo_units, unit_size, |
| 8241 | (gdb_byte *) p, &units_written, |
| 8242 | payload_capacity_bytes); |
| 8243 | } |
| 8244 | |
| 8245 | p += payload_length_bytes; |
| 8246 | if (use_length && units_written < todo_units) |
| 8247 | { |
| 8248 | /* Escape chars have filled up the buffer prematurely, |
| 8249 | and we have actually sent fewer units than planned. |
| 8250 | Fix-up the length field of the packet. Use the same |
| 8251 | number of characters as before. */ |
| 8252 | plen += hexnumnstr (plen, (ULONGEST) units_written, |
| 8253 | plenlen); |
| 8254 | *plen = ':'; /* overwrite \0 from hexnumnstr() */ |
| 8255 | } |
| 8256 | } |
| 8257 | else |
| 8258 | { |
| 8259 | /* Normal mode: Send target system values byte by byte, in |
| 8260 | increasing byte addresses. Each byte is encoded as a two hex |
| 8261 | value. */ |
| 8262 | p += 2 * bin2hex (myaddr, p, todo_units * unit_size); |
| 8263 | units_written = todo_units; |
| 8264 | } |
| 8265 | |
| 8266 | putpkt_binary (rs->buf, (int) (p - rs->buf)); |
| 8267 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 8268 | |
| 8269 | if (rs->buf[0] == 'E') |
| 8270 | return TARGET_XFER_E_IO; |
| 8271 | |
| 8272 | /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to |
| 8273 | send fewer units than we'd planned. */ |
| 8274 | *xfered_len_units = (ULONGEST) units_written; |
| 8275 | return TARGET_XFER_OK; |
| 8276 | } |
| 8277 | |
| 8278 | /* Write memory data directly to the remote machine. |
| 8279 | This does not inform the data cache; the data cache uses this. |
| 8280 | MEMADDR is the address in the remote memory space. |
| 8281 | MYADDR is the address of the buffer in our space. |
| 8282 | LEN is the number of bytes. |
| 8283 | |
| 8284 | Return the transferred status, error or OK (an |
| 8285 | 'enum target_xfer_status' value). Save the number of bytes |
| 8286 | transferred in *XFERED_LEN. Only transfer a single packet. */ |
| 8287 | |
| 8288 | static enum target_xfer_status |
| 8289 | remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, ULONGEST len, |
| 8290 | int unit_size, ULONGEST *xfered_len) |
| 8291 | { |
| 8292 | const char *packet_format = NULL; |
| 8293 | |
| 8294 | /* Check whether the target supports binary download. */ |
| 8295 | check_binary_download (memaddr); |
| 8296 | |
| 8297 | switch (packet_support (PACKET_X)) |
| 8298 | { |
| 8299 | case PACKET_ENABLE: |
| 8300 | packet_format = "X"; |
| 8301 | break; |
| 8302 | case PACKET_DISABLE: |
| 8303 | packet_format = "M"; |
| 8304 | break; |
| 8305 | case PACKET_SUPPORT_UNKNOWN: |
| 8306 | internal_error (__FILE__, __LINE__, |
| 8307 | _("remote_write_bytes: bad internal state")); |
| 8308 | default: |
| 8309 | internal_error (__FILE__, __LINE__, _("bad switch")); |
| 8310 | } |
| 8311 | |
| 8312 | return remote_write_bytes_aux (packet_format, |
| 8313 | memaddr, myaddr, len, unit_size, xfered_len, |
| 8314 | packet_format[0], 1); |
| 8315 | } |
| 8316 | |
| 8317 | /* Read memory data directly from the remote machine. |
| 8318 | This does not use the data cache; the data cache uses this. |
| 8319 | MEMADDR is the address in the remote memory space. |
| 8320 | MYADDR is the address of the buffer in our space. |
| 8321 | LEN_UNITS is the number of addressable memory units to read.. |
| 8322 | UNIT_SIZE is the length in bytes of an addressable unit. |
| 8323 | |
| 8324 | Return the transferred status, error or OK (an |
| 8325 | 'enum target_xfer_status' value). Save the number of bytes |
| 8326 | transferred in *XFERED_LEN_UNITS. |
| 8327 | |
| 8328 | See the comment of remote_write_bytes_aux for an example of |
| 8329 | memory read/write exchange between gdb and the stub. */ |
| 8330 | |
| 8331 | static enum target_xfer_status |
| 8332 | remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr, ULONGEST len_units, |
| 8333 | int unit_size, ULONGEST *xfered_len_units) |
| 8334 | { |
| 8335 | struct remote_state *rs = get_remote_state (); |
| 8336 | int buf_size_bytes; /* Max size of packet output buffer. */ |
| 8337 | char *p; |
| 8338 | int todo_units; |
| 8339 | int decoded_bytes; |
| 8340 | |
| 8341 | buf_size_bytes = get_memory_read_packet_size (); |
| 8342 | /* The packet buffer will be large enough for the payload; |
| 8343 | get_memory_packet_size ensures this. */ |
| 8344 | |
| 8345 | /* Number of units that will fit. */ |
| 8346 | todo_units = std::min (len_units, |
| 8347 | (ULONGEST) (buf_size_bytes / unit_size) / 2); |
| 8348 | |
| 8349 | /* Construct "m"<memaddr>","<len>". */ |
| 8350 | memaddr = remote_address_masked (memaddr); |
| 8351 | p = rs->buf; |
| 8352 | *p++ = 'm'; |
| 8353 | p += hexnumstr (p, (ULONGEST) memaddr); |
| 8354 | *p++ = ','; |
| 8355 | p += hexnumstr (p, (ULONGEST) todo_units); |
| 8356 | *p = '\0'; |
| 8357 | putpkt (rs->buf); |
| 8358 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 8359 | if (rs->buf[0] == 'E' |
| 8360 | && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2]) |
| 8361 | && rs->buf[3] == '\0') |
| 8362 | return TARGET_XFER_E_IO; |
| 8363 | /* Reply describes memory byte by byte, each byte encoded as two hex |
| 8364 | characters. */ |
| 8365 | p = rs->buf; |
| 8366 | decoded_bytes = hex2bin (p, myaddr, todo_units * unit_size); |
| 8367 | /* Return what we have. Let higher layers handle partial reads. */ |
| 8368 | *xfered_len_units = (ULONGEST) (decoded_bytes / unit_size); |
| 8369 | return TARGET_XFER_OK; |
| 8370 | } |
| 8371 | |
| 8372 | /* Using the set of read-only target sections of remote, read live |
| 8373 | read-only memory. |
| 8374 | |
| 8375 | For interface/parameters/return description see target.h, |
| 8376 | to_xfer_partial. */ |
| 8377 | |
| 8378 | static enum target_xfer_status |
| 8379 | remote_xfer_live_readonly_partial (struct target_ops *ops, gdb_byte *readbuf, |
| 8380 | ULONGEST memaddr, ULONGEST len, |
| 8381 | int unit_size, ULONGEST *xfered_len) |
| 8382 | { |
| 8383 | struct target_section *secp; |
| 8384 | struct target_section_table *table; |
| 8385 | |
| 8386 | secp = target_section_by_addr (ops, memaddr); |
| 8387 | if (secp != NULL |
| 8388 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
| 8389 | secp->the_bfd_section) |
| 8390 | & SEC_READONLY)) |
| 8391 | { |
| 8392 | struct target_section *p; |
| 8393 | ULONGEST memend = memaddr + len; |
| 8394 | |
| 8395 | table = target_get_section_table (ops); |
| 8396 | |
| 8397 | for (p = table->sections; p < table->sections_end; p++) |
| 8398 | { |
| 8399 | if (memaddr >= p->addr) |
| 8400 | { |
| 8401 | if (memend <= p->endaddr) |
| 8402 | { |
| 8403 | /* Entire transfer is within this section. */ |
| 8404 | return remote_read_bytes_1 (memaddr, readbuf, len, unit_size, |
| 8405 | xfered_len); |
| 8406 | } |
| 8407 | else if (memaddr >= p->endaddr) |
| 8408 | { |
| 8409 | /* This section ends before the transfer starts. */ |
| 8410 | continue; |
| 8411 | } |
| 8412 | else |
| 8413 | { |
| 8414 | /* This section overlaps the transfer. Just do half. */ |
| 8415 | len = p->endaddr - memaddr; |
| 8416 | return remote_read_bytes_1 (memaddr, readbuf, len, unit_size, |
| 8417 | xfered_len); |
| 8418 | } |
| 8419 | } |
| 8420 | } |
| 8421 | } |
| 8422 | |
| 8423 | return TARGET_XFER_EOF; |
| 8424 | } |
| 8425 | |
| 8426 | /* Similar to remote_read_bytes_1, but it reads from the remote stub |
| 8427 | first if the requested memory is unavailable in traceframe. |
| 8428 | Otherwise, fall back to remote_read_bytes_1. */ |
| 8429 | |
| 8430 | static enum target_xfer_status |
| 8431 | remote_read_bytes (struct target_ops *ops, CORE_ADDR memaddr, |
| 8432 | gdb_byte *myaddr, ULONGEST len, int unit_size, |
| 8433 | ULONGEST *xfered_len) |
| 8434 | { |
| 8435 | if (len == 0) |
| 8436 | return TARGET_XFER_EOF; |
| 8437 | |
| 8438 | if (get_traceframe_number () != -1) |
| 8439 | { |
| 8440 | std::vector<mem_range> available; |
| 8441 | |
| 8442 | /* If we fail to get the set of available memory, then the |
| 8443 | target does not support querying traceframe info, and so we |
| 8444 | attempt reading from the traceframe anyway (assuming the |
| 8445 | target implements the old QTro packet then). */ |
| 8446 | if (traceframe_available_memory (&available, memaddr, len)) |
| 8447 | { |
| 8448 | if (available.empty () || available[0].start != memaddr) |
| 8449 | { |
| 8450 | enum target_xfer_status res; |
| 8451 | |
| 8452 | /* Don't read into the traceframe's available |
| 8453 | memory. */ |
| 8454 | if (!available.empty ()) |
| 8455 | { |
| 8456 | LONGEST oldlen = len; |
| 8457 | |
| 8458 | len = available[0].start - memaddr; |
| 8459 | gdb_assert (len <= oldlen); |
| 8460 | } |
| 8461 | |
| 8462 | /* This goes through the topmost target again. */ |
| 8463 | res = remote_xfer_live_readonly_partial (ops, myaddr, memaddr, |
| 8464 | len, unit_size, xfered_len); |
| 8465 | if (res == TARGET_XFER_OK) |
| 8466 | return TARGET_XFER_OK; |
| 8467 | else |
| 8468 | { |
| 8469 | /* No use trying further, we know some memory starting |
| 8470 | at MEMADDR isn't available. */ |
| 8471 | *xfered_len = len; |
| 8472 | return TARGET_XFER_UNAVAILABLE; |
| 8473 | } |
| 8474 | } |
| 8475 | |
| 8476 | /* Don't try to read more than how much is available, in |
| 8477 | case the target implements the deprecated QTro packet to |
| 8478 | cater for older GDBs (the target's knowledge of read-only |
| 8479 | sections may be outdated by now). */ |
| 8480 | len = available[0].length; |
| 8481 | } |
| 8482 | } |
| 8483 | |
| 8484 | return remote_read_bytes_1 (memaddr, myaddr, len, unit_size, xfered_len); |
| 8485 | } |
| 8486 | |
| 8487 | \f |
| 8488 | |
| 8489 | /* Sends a packet with content determined by the printf format string |
| 8490 | FORMAT and the remaining arguments, then gets the reply. Returns |
| 8491 | whether the packet was a success, a failure, or unknown. */ |
| 8492 | |
| 8493 | static enum packet_result remote_send_printf (const char *format, ...) |
| 8494 | ATTRIBUTE_PRINTF (1, 2); |
| 8495 | |
| 8496 | static enum packet_result |
| 8497 | remote_send_printf (const char *format, ...) |
| 8498 | { |
| 8499 | struct remote_state *rs = get_remote_state (); |
| 8500 | int max_size = get_remote_packet_size (); |
| 8501 | va_list ap; |
| 8502 | |
| 8503 | va_start (ap, format); |
| 8504 | |
| 8505 | rs->buf[0] = '\0'; |
| 8506 | if (vsnprintf (rs->buf, max_size, format, ap) >= max_size) |
| 8507 | internal_error (__FILE__, __LINE__, _("Too long remote packet.")); |
| 8508 | |
| 8509 | if (putpkt (rs->buf) < 0) |
| 8510 | error (_("Communication problem with target.")); |
| 8511 | |
| 8512 | rs->buf[0] = '\0'; |
| 8513 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 8514 | |
| 8515 | return packet_check_result (rs->buf); |
| 8516 | } |
| 8517 | |
| 8518 | /* Flash writing can take quite some time. We'll set |
| 8519 | effectively infinite timeout for flash operations. |
| 8520 | In future, we'll need to decide on a better approach. */ |
| 8521 | static const int remote_flash_timeout = 1000; |
| 8522 | |
| 8523 | static void |
| 8524 | remote_flash_erase (struct target_ops *ops, |
| 8525 | ULONGEST address, LONGEST length) |
| 8526 | { |
| 8527 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
| 8528 | enum packet_result ret; |
| 8529 | scoped_restore restore_timeout |
| 8530 | = make_scoped_restore (&remote_timeout, remote_flash_timeout); |
| 8531 | |
| 8532 | ret = remote_send_printf ("vFlashErase:%s,%s", |
| 8533 | phex (address, addr_size), |
| 8534 | phex (length, 4)); |
| 8535 | switch (ret) |
| 8536 | { |
| 8537 | case PACKET_UNKNOWN: |
| 8538 | error (_("Remote target does not support flash erase")); |
| 8539 | case PACKET_ERROR: |
| 8540 | error (_("Error erasing flash with vFlashErase packet")); |
| 8541 | default: |
| 8542 | break; |
| 8543 | } |
| 8544 | } |
| 8545 | |
| 8546 | static enum target_xfer_status |
| 8547 | remote_flash_write (struct target_ops *ops, ULONGEST address, |
| 8548 | ULONGEST length, ULONGEST *xfered_len, |
| 8549 | const gdb_byte *data) |
| 8550 | { |
| 8551 | scoped_restore restore_timeout |
| 8552 | = make_scoped_restore (&remote_timeout, remote_flash_timeout); |
| 8553 | return remote_write_bytes_aux ("vFlashWrite:", address, data, length, 1, |
| 8554 | xfered_len,'X', 0); |
| 8555 | } |
| 8556 | |
| 8557 | static void |
| 8558 | remote_flash_done (struct target_ops *ops) |
| 8559 | { |
| 8560 | int ret; |
| 8561 | |
| 8562 | scoped_restore restore_timeout |
| 8563 | = make_scoped_restore (&remote_timeout, remote_flash_timeout); |
| 8564 | |
| 8565 | ret = remote_send_printf ("vFlashDone"); |
| 8566 | |
| 8567 | switch (ret) |
| 8568 | { |
| 8569 | case PACKET_UNKNOWN: |
| 8570 | error (_("Remote target does not support vFlashDone")); |
| 8571 | case PACKET_ERROR: |
| 8572 | error (_("Error finishing flash operation")); |
| 8573 | default: |
| 8574 | break; |
| 8575 | } |
| 8576 | } |
| 8577 | |
| 8578 | static void |
| 8579 | remote_files_info (struct target_ops *ignore) |
| 8580 | { |
| 8581 | puts_filtered ("Debugging a target over a serial line.\n"); |
| 8582 | } |
| 8583 | \f |
| 8584 | /* Stuff for dealing with the packets which are part of this protocol. |
| 8585 | See comment at top of file for details. */ |
| 8586 | |
| 8587 | /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR |
| 8588 | error to higher layers. Called when a serial error is detected. |
| 8589 | The exception message is STRING, followed by a colon and a blank, |
| 8590 | the system error message for errno at function entry and final dot |
| 8591 | for output compatibility with throw_perror_with_name. */ |
| 8592 | |
| 8593 | static void |
| 8594 | unpush_and_perror (const char *string) |
| 8595 | { |
| 8596 | int saved_errno = errno; |
| 8597 | |
| 8598 | remote_unpush_target (); |
| 8599 | throw_error (TARGET_CLOSE_ERROR, "%s: %s.", string, |
| 8600 | safe_strerror (saved_errno)); |
| 8601 | } |
| 8602 | |
| 8603 | /* Read a single character from the remote end. The current quit |
| 8604 | handler is overridden to avoid quitting in the middle of packet |
| 8605 | sequence, as that would break communication with the remote server. |
| 8606 | See remote_serial_quit_handler for more detail. */ |
| 8607 | |
| 8608 | static int |
| 8609 | readchar (int timeout) |
| 8610 | { |
| 8611 | int ch; |
| 8612 | struct remote_state *rs = get_remote_state (); |
| 8613 | |
| 8614 | { |
| 8615 | scoped_restore restore_quit |
| 8616 | = make_scoped_restore (&quit_handler, remote_serial_quit_handler); |
| 8617 | |
| 8618 | rs->got_ctrlc_during_io = 0; |
| 8619 | |
| 8620 | ch = serial_readchar (rs->remote_desc, timeout); |
| 8621 | |
| 8622 | if (rs->got_ctrlc_during_io) |
| 8623 | set_quit_flag (); |
| 8624 | } |
| 8625 | |
| 8626 | if (ch >= 0) |
| 8627 | return ch; |
| 8628 | |
| 8629 | switch ((enum serial_rc) ch) |
| 8630 | { |
| 8631 | case SERIAL_EOF: |
| 8632 | remote_unpush_target (); |
| 8633 | throw_error (TARGET_CLOSE_ERROR, _("Remote connection closed")); |
| 8634 | /* no return */ |
| 8635 | case SERIAL_ERROR: |
| 8636 | unpush_and_perror (_("Remote communication error. " |
| 8637 | "Target disconnected.")); |
| 8638 | /* no return */ |
| 8639 | case SERIAL_TIMEOUT: |
| 8640 | break; |
| 8641 | } |
| 8642 | return ch; |
| 8643 | } |
| 8644 | |
| 8645 | /* Wrapper for serial_write that closes the target and throws if |
| 8646 | writing fails. The current quit handler is overridden to avoid |
| 8647 | quitting in the middle of packet sequence, as that would break |
| 8648 | communication with the remote server. See |
| 8649 | remote_serial_quit_handler for more detail. */ |
| 8650 | |
| 8651 | static void |
| 8652 | remote_serial_write (const char *str, int len) |
| 8653 | { |
| 8654 | struct remote_state *rs = get_remote_state (); |
| 8655 | |
| 8656 | scoped_restore restore_quit |
| 8657 | = make_scoped_restore (&quit_handler, remote_serial_quit_handler); |
| 8658 | |
| 8659 | rs->got_ctrlc_during_io = 0; |
| 8660 | |
| 8661 | if (serial_write (rs->remote_desc, str, len)) |
| 8662 | { |
| 8663 | unpush_and_perror (_("Remote communication error. " |
| 8664 | "Target disconnected.")); |
| 8665 | } |
| 8666 | |
| 8667 | if (rs->got_ctrlc_during_io) |
| 8668 | set_quit_flag (); |
| 8669 | } |
| 8670 | |
| 8671 | /* Send the command in *BUF to the remote machine, and read the reply |
| 8672 | into *BUF. Report an error if we get an error reply. Resize |
| 8673 | *BUF using xrealloc if necessary to hold the result, and update |
| 8674 | *SIZEOF_BUF. */ |
| 8675 | |
| 8676 | static void |
| 8677 | remote_send (char **buf, |
| 8678 | long *sizeof_buf) |
| 8679 | { |
| 8680 | putpkt (*buf); |
| 8681 | getpkt (buf, sizeof_buf, 0); |
| 8682 | |
| 8683 | if ((*buf)[0] == 'E') |
| 8684 | error (_("Remote failure reply: %s"), *buf); |
| 8685 | } |
| 8686 | |
| 8687 | /* Return a string representing an escaped version of BUF, of len N. |
| 8688 | E.g. \n is converted to \\n, \t to \\t, etc. */ |
| 8689 | |
| 8690 | static std::string |
| 8691 | escape_buffer (const char *buf, int n) |
| 8692 | { |
| 8693 | string_file stb; |
| 8694 | |
| 8695 | stb.putstrn (buf, n, '\\'); |
| 8696 | return std::move (stb.string ()); |
| 8697 | } |
| 8698 | |
| 8699 | /* Display a null-terminated packet on stdout, for debugging, using C |
| 8700 | string notation. */ |
| 8701 | |
| 8702 | static void |
| 8703 | print_packet (const char *buf) |
| 8704 | { |
| 8705 | puts_filtered ("\""); |
| 8706 | fputstr_filtered (buf, '"', gdb_stdout); |
| 8707 | puts_filtered ("\""); |
| 8708 | } |
| 8709 | |
| 8710 | int |
| 8711 | putpkt (const char *buf) |
| 8712 | { |
| 8713 | return putpkt_binary (buf, strlen (buf)); |
| 8714 | } |
| 8715 | |
| 8716 | /* Send a packet to the remote machine, with error checking. The data |
| 8717 | of the packet is in BUF. The string in BUF can be at most |
| 8718 | get_remote_packet_size () - 5 to account for the $, # and checksum, |
| 8719 | and for a possible /0 if we are debugging (remote_debug) and want |
| 8720 | to print the sent packet as a string. */ |
| 8721 | |
| 8722 | static int |
| 8723 | putpkt_binary (const char *buf, int cnt) |
| 8724 | { |
| 8725 | struct remote_state *rs = get_remote_state (); |
| 8726 | int i; |
| 8727 | unsigned char csum = 0; |
| 8728 | gdb::def_vector<char> data (cnt + 6); |
| 8729 | char *buf2 = data.data (); |
| 8730 | |
| 8731 | int ch; |
| 8732 | int tcount = 0; |
| 8733 | char *p; |
| 8734 | |
| 8735 | /* Catch cases like trying to read memory or listing threads while |
| 8736 | we're waiting for a stop reply. The remote server wouldn't be |
| 8737 | ready to handle this request, so we'd hang and timeout. We don't |
| 8738 | have to worry about this in synchronous mode, because in that |
| 8739 | case it's not possible to issue a command while the target is |
| 8740 | running. This is not a problem in non-stop mode, because in that |
| 8741 | case, the stub is always ready to process serial input. */ |
| 8742 | if (!target_is_non_stop_p () |
| 8743 | && target_is_async_p () |
| 8744 | && rs->waiting_for_stop_reply) |
| 8745 | { |
| 8746 | error (_("Cannot execute this command while the target is running.\n" |
| 8747 | "Use the \"interrupt\" command to stop the target\n" |
| 8748 | "and then try again.")); |
| 8749 | } |
| 8750 | |
| 8751 | /* We're sending out a new packet. Make sure we don't look at a |
| 8752 | stale cached response. */ |
| 8753 | rs->cached_wait_status = 0; |
| 8754 | |
| 8755 | /* Copy the packet into buffer BUF2, encapsulating it |
| 8756 | and giving it a checksum. */ |
| 8757 | |
| 8758 | p = buf2; |
| 8759 | *p++ = '$'; |
| 8760 | |
| 8761 | for (i = 0; i < cnt; i++) |
| 8762 | { |
| 8763 | csum += buf[i]; |
| 8764 | *p++ = buf[i]; |
| 8765 | } |
| 8766 | *p++ = '#'; |
| 8767 | *p++ = tohex ((csum >> 4) & 0xf); |
| 8768 | *p++ = tohex (csum & 0xf); |
| 8769 | |
| 8770 | /* Send it over and over until we get a positive ack. */ |
| 8771 | |
| 8772 | while (1) |
| 8773 | { |
| 8774 | int started_error_output = 0; |
| 8775 | |
| 8776 | if (remote_debug) |
| 8777 | { |
| 8778 | *p = '\0'; |
| 8779 | |
| 8780 | int len = (int) (p - buf2); |
| 8781 | |
| 8782 | std::string str |
| 8783 | = escape_buffer (buf2, std::min (len, REMOTE_DEBUG_MAX_CHAR)); |
| 8784 | |
| 8785 | fprintf_unfiltered (gdb_stdlog, "Sending packet: %s", str.c_str ()); |
| 8786 | |
| 8787 | if (str.length () > REMOTE_DEBUG_MAX_CHAR) |
| 8788 | { |
| 8789 | fprintf_unfiltered (gdb_stdlog, "[%zu bytes omitted]", |
| 8790 | str.length () - REMOTE_DEBUG_MAX_CHAR); |
| 8791 | } |
| 8792 | |
| 8793 | fprintf_unfiltered (gdb_stdlog, "..."); |
| 8794 | |
| 8795 | gdb_flush (gdb_stdlog); |
| 8796 | } |
| 8797 | remote_serial_write (buf2, p - buf2); |
| 8798 | |
| 8799 | /* If this is a no acks version of the remote protocol, send the |
| 8800 | packet and move on. */ |
| 8801 | if (rs->noack_mode) |
| 8802 | break; |
| 8803 | |
| 8804 | /* Read until either a timeout occurs (-2) or '+' is read. |
| 8805 | Handle any notification that arrives in the mean time. */ |
| 8806 | while (1) |
| 8807 | { |
| 8808 | ch = readchar (remote_timeout); |
| 8809 | |
| 8810 | if (remote_debug) |
| 8811 | { |
| 8812 | switch (ch) |
| 8813 | { |
| 8814 | case '+': |
| 8815 | case '-': |
| 8816 | case SERIAL_TIMEOUT: |
| 8817 | case '$': |
| 8818 | case '%': |
| 8819 | if (started_error_output) |
| 8820 | { |
| 8821 | putchar_unfiltered ('\n'); |
| 8822 | started_error_output = 0; |
| 8823 | } |
| 8824 | } |
| 8825 | } |
| 8826 | |
| 8827 | switch (ch) |
| 8828 | { |
| 8829 | case '+': |
| 8830 | if (remote_debug) |
| 8831 | fprintf_unfiltered (gdb_stdlog, "Ack\n"); |
| 8832 | return 1; |
| 8833 | case '-': |
| 8834 | if (remote_debug) |
| 8835 | fprintf_unfiltered (gdb_stdlog, "Nak\n"); |
| 8836 | /* FALLTHROUGH */ |
| 8837 | case SERIAL_TIMEOUT: |
| 8838 | tcount++; |
| 8839 | if (tcount > 3) |
| 8840 | return 0; |
| 8841 | break; /* Retransmit buffer. */ |
| 8842 | case '$': |
| 8843 | { |
| 8844 | if (remote_debug) |
| 8845 | fprintf_unfiltered (gdb_stdlog, |
| 8846 | "Packet instead of Ack, ignoring it\n"); |
| 8847 | /* It's probably an old response sent because an ACK |
| 8848 | was lost. Gobble up the packet and ack it so it |
| 8849 | doesn't get retransmitted when we resend this |
| 8850 | packet. */ |
| 8851 | skip_frame (); |
| 8852 | remote_serial_write ("+", 1); |
| 8853 | continue; /* Now, go look for +. */ |
| 8854 | } |
| 8855 | |
| 8856 | case '%': |
| 8857 | { |
| 8858 | int val; |
| 8859 | |
| 8860 | /* If we got a notification, handle it, and go back to looking |
| 8861 | for an ack. */ |
| 8862 | /* We've found the start of a notification. Now |
| 8863 | collect the data. */ |
| 8864 | val = read_frame (&rs->buf, &rs->buf_size); |
| 8865 | if (val >= 0) |
| 8866 | { |
| 8867 | if (remote_debug) |
| 8868 | { |
| 8869 | std::string str = escape_buffer (rs->buf, val); |
| 8870 | |
| 8871 | fprintf_unfiltered (gdb_stdlog, |
| 8872 | " Notification received: %s\n", |
| 8873 | str.c_str ()); |
| 8874 | } |
| 8875 | handle_notification (rs->notif_state, rs->buf); |
| 8876 | /* We're in sync now, rewait for the ack. */ |
| 8877 | tcount = 0; |
| 8878 | } |
| 8879 | else |
| 8880 | { |
| 8881 | if (remote_debug) |
| 8882 | { |
| 8883 | if (!started_error_output) |
| 8884 | { |
| 8885 | started_error_output = 1; |
| 8886 | fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: "); |
| 8887 | } |
| 8888 | fputc_unfiltered (ch & 0177, gdb_stdlog); |
| 8889 | fprintf_unfiltered (gdb_stdlog, "%s", rs->buf); |
| 8890 | } |
| 8891 | } |
| 8892 | continue; |
| 8893 | } |
| 8894 | /* fall-through */ |
| 8895 | default: |
| 8896 | if (remote_debug) |
| 8897 | { |
| 8898 | if (!started_error_output) |
| 8899 | { |
| 8900 | started_error_output = 1; |
| 8901 | fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: "); |
| 8902 | } |
| 8903 | fputc_unfiltered (ch & 0177, gdb_stdlog); |
| 8904 | } |
| 8905 | continue; |
| 8906 | } |
| 8907 | break; /* Here to retransmit. */ |
| 8908 | } |
| 8909 | |
| 8910 | #if 0 |
| 8911 | /* This is wrong. If doing a long backtrace, the user should be |
| 8912 | able to get out next time we call QUIT, without anything as |
| 8913 | violent as interrupt_query. If we want to provide a way out of |
| 8914 | here without getting to the next QUIT, it should be based on |
| 8915 | hitting ^C twice as in remote_wait. */ |
| 8916 | if (quit_flag) |
| 8917 | { |
| 8918 | quit_flag = 0; |
| 8919 | interrupt_query (); |
| 8920 | } |
| 8921 | #endif |
| 8922 | } |
| 8923 | |
| 8924 | return 0; |
| 8925 | } |
| 8926 | |
| 8927 | /* Come here after finding the start of a frame when we expected an |
| 8928 | ack. Do our best to discard the rest of this packet. */ |
| 8929 | |
| 8930 | static void |
| 8931 | skip_frame (void) |
| 8932 | { |
| 8933 | int c; |
| 8934 | |
| 8935 | while (1) |
| 8936 | { |
| 8937 | c = readchar (remote_timeout); |
| 8938 | switch (c) |
| 8939 | { |
| 8940 | case SERIAL_TIMEOUT: |
| 8941 | /* Nothing we can do. */ |
| 8942 | return; |
| 8943 | case '#': |
| 8944 | /* Discard the two bytes of checksum and stop. */ |
| 8945 | c = readchar (remote_timeout); |
| 8946 | if (c >= 0) |
| 8947 | c = readchar (remote_timeout); |
| 8948 | |
| 8949 | return; |
| 8950 | case '*': /* Run length encoding. */ |
| 8951 | /* Discard the repeat count. */ |
| 8952 | c = readchar (remote_timeout); |
| 8953 | if (c < 0) |
| 8954 | return; |
| 8955 | break; |
| 8956 | default: |
| 8957 | /* A regular character. */ |
| 8958 | break; |
| 8959 | } |
| 8960 | } |
| 8961 | } |
| 8962 | |
| 8963 | /* Come here after finding the start of the frame. Collect the rest |
| 8964 | into *BUF, verifying the checksum, length, and handling run-length |
| 8965 | compression. NUL terminate the buffer. If there is not enough room, |
| 8966 | expand *BUF using xrealloc. |
| 8967 | |
| 8968 | Returns -1 on error, number of characters in buffer (ignoring the |
| 8969 | trailing NULL) on success. (could be extended to return one of the |
| 8970 | SERIAL status indications). */ |
| 8971 | |
| 8972 | static long |
| 8973 | read_frame (char **buf_p, |
| 8974 | long *sizeof_buf) |
| 8975 | { |
| 8976 | unsigned char csum; |
| 8977 | long bc; |
| 8978 | int c; |
| 8979 | char *buf = *buf_p; |
| 8980 | struct remote_state *rs = get_remote_state (); |
| 8981 | |
| 8982 | csum = 0; |
| 8983 | bc = 0; |
| 8984 | |
| 8985 | while (1) |
| 8986 | { |
| 8987 | c = readchar (remote_timeout); |
| 8988 | switch (c) |
| 8989 | { |
| 8990 | case SERIAL_TIMEOUT: |
| 8991 | if (remote_debug) |
| 8992 | fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog); |
| 8993 | return -1; |
| 8994 | case '$': |
| 8995 | if (remote_debug) |
| 8996 | fputs_filtered ("Saw new packet start in middle of old one\n", |
| 8997 | gdb_stdlog); |
| 8998 | return -1; /* Start a new packet, count retries. */ |
| 8999 | case '#': |
| 9000 | { |
| 9001 | unsigned char pktcsum; |
| 9002 | int check_0 = 0; |
| 9003 | int check_1 = 0; |
| 9004 | |
| 9005 | buf[bc] = '\0'; |
| 9006 | |
| 9007 | check_0 = readchar (remote_timeout); |
| 9008 | if (check_0 >= 0) |
| 9009 | check_1 = readchar (remote_timeout); |
| 9010 | |
| 9011 | if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT) |
| 9012 | { |
| 9013 | if (remote_debug) |
| 9014 | fputs_filtered ("Timeout in checksum, retrying\n", |
| 9015 | gdb_stdlog); |
| 9016 | return -1; |
| 9017 | } |
| 9018 | else if (check_0 < 0 || check_1 < 0) |
| 9019 | { |
| 9020 | if (remote_debug) |
| 9021 | fputs_filtered ("Communication error in checksum\n", |
| 9022 | gdb_stdlog); |
| 9023 | return -1; |
| 9024 | } |
| 9025 | |
| 9026 | /* Don't recompute the checksum; with no ack packets we |
| 9027 | don't have any way to indicate a packet retransmission |
| 9028 | is necessary. */ |
| 9029 | if (rs->noack_mode) |
| 9030 | return bc; |
| 9031 | |
| 9032 | pktcsum = (fromhex (check_0) << 4) | fromhex (check_1); |
| 9033 | if (csum == pktcsum) |
| 9034 | return bc; |
| 9035 | |
| 9036 | if (remote_debug) |
| 9037 | { |
| 9038 | std::string str = escape_buffer (buf, bc); |
| 9039 | |
| 9040 | fprintf_unfiltered (gdb_stdlog, |
| 9041 | "Bad checksum, sentsum=0x%x, " |
| 9042 | "csum=0x%x, buf=%s\n", |
| 9043 | pktcsum, csum, str.c_str ()); |
| 9044 | } |
| 9045 | /* Number of characters in buffer ignoring trailing |
| 9046 | NULL. */ |
| 9047 | return -1; |
| 9048 | } |
| 9049 | case '*': /* Run length encoding. */ |
| 9050 | { |
| 9051 | int repeat; |
| 9052 | |
| 9053 | csum += c; |
| 9054 | c = readchar (remote_timeout); |
| 9055 | csum += c; |
| 9056 | repeat = c - ' ' + 3; /* Compute repeat count. */ |
| 9057 | |
| 9058 | /* The character before ``*'' is repeated. */ |
| 9059 | |
| 9060 | if (repeat > 0 && repeat <= 255 && bc > 0) |
| 9061 | { |
| 9062 | if (bc + repeat - 1 >= *sizeof_buf - 1) |
| 9063 | { |
| 9064 | /* Make some more room in the buffer. */ |
| 9065 | *sizeof_buf += repeat; |
| 9066 | *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf); |
| 9067 | buf = *buf_p; |
| 9068 | } |
| 9069 | |
| 9070 | memset (&buf[bc], buf[bc - 1], repeat); |
| 9071 | bc += repeat; |
| 9072 | continue; |
| 9073 | } |
| 9074 | |
| 9075 | buf[bc] = '\0'; |
| 9076 | printf_filtered (_("Invalid run length encoding: %s\n"), buf); |
| 9077 | return -1; |
| 9078 | } |
| 9079 | default: |
| 9080 | if (bc >= *sizeof_buf - 1) |
| 9081 | { |
| 9082 | /* Make some more room in the buffer. */ |
| 9083 | *sizeof_buf *= 2; |
| 9084 | *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf); |
| 9085 | buf = *buf_p; |
| 9086 | } |
| 9087 | |
| 9088 | buf[bc++] = c; |
| 9089 | csum += c; |
| 9090 | continue; |
| 9091 | } |
| 9092 | } |
| 9093 | } |
| 9094 | |
| 9095 | /* Read a packet from the remote machine, with error checking, and |
| 9096 | store it in *BUF. Resize *BUF using xrealloc if necessary to hold |
| 9097 | the result, and update *SIZEOF_BUF. If FOREVER, wait forever |
| 9098 | rather than timing out; this is used (in synchronous mode) to wait |
| 9099 | for a target that is is executing user code to stop. */ |
| 9100 | /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we |
| 9101 | don't have to change all the calls to getpkt to deal with the |
| 9102 | return value, because at the moment I don't know what the right |
| 9103 | thing to do it for those. */ |
| 9104 | void |
| 9105 | getpkt (char **buf, |
| 9106 | long *sizeof_buf, |
| 9107 | int forever) |
| 9108 | { |
| 9109 | getpkt_sane (buf, sizeof_buf, forever); |
| 9110 | } |
| 9111 | |
| 9112 | |
| 9113 | /* Read a packet from the remote machine, with error checking, and |
| 9114 | store it in *BUF. Resize *BUF using xrealloc if necessary to hold |
| 9115 | the result, and update *SIZEOF_BUF. If FOREVER, wait forever |
| 9116 | rather than timing out; this is used (in synchronous mode) to wait |
| 9117 | for a target that is is executing user code to stop. If FOREVER == |
| 9118 | 0, this function is allowed to time out gracefully and return an |
| 9119 | indication of this to the caller. Otherwise return the number of |
| 9120 | bytes read. If EXPECTING_NOTIF, consider receiving a notification |
| 9121 | enough reason to return to the caller. *IS_NOTIF is an output |
| 9122 | boolean that indicates whether *BUF holds a notification or not |
| 9123 | (a regular packet). */ |
| 9124 | |
| 9125 | static int |
| 9126 | getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever, |
| 9127 | int expecting_notif, int *is_notif) |
| 9128 | { |
| 9129 | struct remote_state *rs = get_remote_state (); |
| 9130 | int c; |
| 9131 | int tries; |
| 9132 | int timeout; |
| 9133 | int val = -1; |
| 9134 | |
| 9135 | /* We're reading a new response. Make sure we don't look at a |
| 9136 | previously cached response. */ |
| 9137 | rs->cached_wait_status = 0; |
| 9138 | |
| 9139 | strcpy (*buf, "timeout"); |
| 9140 | |
| 9141 | if (forever) |
| 9142 | timeout = watchdog > 0 ? watchdog : -1; |
| 9143 | else if (expecting_notif) |
| 9144 | timeout = 0; /* There should already be a char in the buffer. If |
| 9145 | not, bail out. */ |
| 9146 | else |
| 9147 | timeout = remote_timeout; |
| 9148 | |
| 9149 | #define MAX_TRIES 3 |
| 9150 | |
| 9151 | /* Process any number of notifications, and then return when |
| 9152 | we get a packet. */ |
| 9153 | for (;;) |
| 9154 | { |
| 9155 | /* If we get a timeout or bad checksum, retry up to MAX_TRIES |
| 9156 | times. */ |
| 9157 | for (tries = 1; tries <= MAX_TRIES; tries++) |
| 9158 | { |
| 9159 | /* This can loop forever if the remote side sends us |
| 9160 | characters continuously, but if it pauses, we'll get |
| 9161 | SERIAL_TIMEOUT from readchar because of timeout. Then |
| 9162 | we'll count that as a retry. |
| 9163 | |
| 9164 | Note that even when forever is set, we will only wait |
| 9165 | forever prior to the start of a packet. After that, we |
| 9166 | expect characters to arrive at a brisk pace. They should |
| 9167 | show up within remote_timeout intervals. */ |
| 9168 | do |
| 9169 | c = readchar (timeout); |
| 9170 | while (c != SERIAL_TIMEOUT && c != '$' && c != '%'); |
| 9171 | |
| 9172 | if (c == SERIAL_TIMEOUT) |
| 9173 | { |
| 9174 | if (expecting_notif) |
| 9175 | return -1; /* Don't complain, it's normal to not get |
| 9176 | anything in this case. */ |
| 9177 | |
| 9178 | if (forever) /* Watchdog went off? Kill the target. */ |
| 9179 | { |
| 9180 | remote_unpush_target (); |
| 9181 | throw_error (TARGET_CLOSE_ERROR, |
| 9182 | _("Watchdog timeout has expired. " |
| 9183 | "Target detached.")); |
| 9184 | } |
| 9185 | if (remote_debug) |
| 9186 | fputs_filtered ("Timed out.\n", gdb_stdlog); |
| 9187 | } |
| 9188 | else |
| 9189 | { |
| 9190 | /* We've found the start of a packet or notification. |
| 9191 | Now collect the data. */ |
| 9192 | val = read_frame (buf, sizeof_buf); |
| 9193 | if (val >= 0) |
| 9194 | break; |
| 9195 | } |
| 9196 | |
| 9197 | remote_serial_write ("-", 1); |
| 9198 | } |
| 9199 | |
| 9200 | if (tries > MAX_TRIES) |
| 9201 | { |
| 9202 | /* We have tried hard enough, and just can't receive the |
| 9203 | packet/notification. Give up. */ |
| 9204 | printf_unfiltered (_("Ignoring packet error, continuing...\n")); |
| 9205 | |
| 9206 | /* Skip the ack char if we're in no-ack mode. */ |
| 9207 | if (!rs->noack_mode) |
| 9208 | remote_serial_write ("+", 1); |
| 9209 | return -1; |
| 9210 | } |
| 9211 | |
| 9212 | /* If we got an ordinary packet, return that to our caller. */ |
| 9213 | if (c == '$') |
| 9214 | { |
| 9215 | if (remote_debug) |
| 9216 | { |
| 9217 | std::string str |
| 9218 | = escape_buffer (*buf, |
| 9219 | std::min (val, REMOTE_DEBUG_MAX_CHAR)); |
| 9220 | |
| 9221 | fprintf_unfiltered (gdb_stdlog, "Packet received: %s", |
| 9222 | str.c_str ()); |
| 9223 | |
| 9224 | if (str.length () > REMOTE_DEBUG_MAX_CHAR) |
| 9225 | { |
| 9226 | fprintf_unfiltered (gdb_stdlog, "[%zu bytes omitted]", |
| 9227 | str.length () - REMOTE_DEBUG_MAX_CHAR); |
| 9228 | } |
| 9229 | |
| 9230 | fprintf_unfiltered (gdb_stdlog, "\n"); |
| 9231 | } |
| 9232 | |
| 9233 | /* Skip the ack char if we're in no-ack mode. */ |
| 9234 | if (!rs->noack_mode) |
| 9235 | remote_serial_write ("+", 1); |
| 9236 | if (is_notif != NULL) |
| 9237 | *is_notif = 0; |
| 9238 | return val; |
| 9239 | } |
| 9240 | |
| 9241 | /* If we got a notification, handle it, and go back to looking |
| 9242 | for a packet. */ |
| 9243 | else |
| 9244 | { |
| 9245 | gdb_assert (c == '%'); |
| 9246 | |
| 9247 | if (remote_debug) |
| 9248 | { |
| 9249 | std::string str = escape_buffer (*buf, val); |
| 9250 | |
| 9251 | fprintf_unfiltered (gdb_stdlog, |
| 9252 | " Notification received: %s\n", |
| 9253 | str.c_str ()); |
| 9254 | } |
| 9255 | if (is_notif != NULL) |
| 9256 | *is_notif = 1; |
| 9257 | |
| 9258 | handle_notification (rs->notif_state, *buf); |
| 9259 | |
| 9260 | /* Notifications require no acknowledgement. */ |
| 9261 | |
| 9262 | if (expecting_notif) |
| 9263 | return val; |
| 9264 | } |
| 9265 | } |
| 9266 | } |
| 9267 | |
| 9268 | static int |
| 9269 | getpkt_sane (char **buf, long *sizeof_buf, int forever) |
| 9270 | { |
| 9271 | return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0, NULL); |
| 9272 | } |
| 9273 | |
| 9274 | static int |
| 9275 | getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever, |
| 9276 | int *is_notif) |
| 9277 | { |
| 9278 | return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1, |
| 9279 | is_notif); |
| 9280 | } |
| 9281 | |
| 9282 | /* Check whether EVENT is a fork event for the process specified |
| 9283 | by the pid passed in DATA, and if it is, kill the fork child. */ |
| 9284 | |
| 9285 | static int |
| 9286 | kill_child_of_pending_fork (QUEUE (stop_reply_p) *q, |
| 9287 | QUEUE_ITER (stop_reply_p) *iter, |
| 9288 | stop_reply_p event, |
| 9289 | void *data) |
| 9290 | { |
| 9291 | struct queue_iter_param *param = (struct queue_iter_param *) data; |
| 9292 | int parent_pid = *(int *) param->input; |
| 9293 | |
| 9294 | if (is_pending_fork_parent (&event->ws, parent_pid, event->ptid)) |
| 9295 | { |
| 9296 | struct remote_state *rs = get_remote_state (); |
| 9297 | int child_pid = ptid_get_pid (event->ws.value.related_pid); |
| 9298 | int res; |
| 9299 | |
| 9300 | res = remote_vkill (child_pid, rs); |
| 9301 | if (res != 0) |
| 9302 | error (_("Can't kill fork child process %d"), child_pid); |
| 9303 | } |
| 9304 | |
| 9305 | return 1; |
| 9306 | } |
| 9307 | |
| 9308 | /* Kill any new fork children of process PID that haven't been |
| 9309 | processed by follow_fork. */ |
| 9310 | |
| 9311 | static void |
| 9312 | kill_new_fork_children (int pid, struct remote_state *rs) |
| 9313 | { |
| 9314 | struct thread_info *thread; |
| 9315 | struct notif_client *notif = ¬if_client_stop; |
| 9316 | struct queue_iter_param param; |
| 9317 | |
| 9318 | /* Kill the fork child threads of any threads in process PID |
| 9319 | that are stopped at a fork event. */ |
| 9320 | ALL_NON_EXITED_THREADS (thread) |
| 9321 | { |
| 9322 | struct target_waitstatus *ws = &thread->pending_follow; |
| 9323 | |
| 9324 | if (is_pending_fork_parent (ws, pid, thread->ptid)) |
| 9325 | { |
| 9326 | struct remote_state *rs = get_remote_state (); |
| 9327 | int child_pid = ptid_get_pid (ws->value.related_pid); |
| 9328 | int res; |
| 9329 | |
| 9330 | res = remote_vkill (child_pid, rs); |
| 9331 | if (res != 0) |
| 9332 | error (_("Can't kill fork child process %d"), child_pid); |
| 9333 | } |
| 9334 | } |
| 9335 | |
| 9336 | /* Check for any pending fork events (not reported or processed yet) |
| 9337 | in process PID and kill those fork child threads as well. */ |
| 9338 | remote_notif_get_pending_events (notif); |
| 9339 | param.input = &pid; |
| 9340 | param.output = NULL; |
| 9341 | QUEUE_iterate (stop_reply_p, stop_reply_queue, |
| 9342 | kill_child_of_pending_fork, ¶m); |
| 9343 | } |
| 9344 | |
| 9345 | \f |
| 9346 | /* Target hook to kill the current inferior. */ |
| 9347 | |
| 9348 | static void |
| 9349 | remote_kill (struct target_ops *ops) |
| 9350 | { |
| 9351 | int res = -1; |
| 9352 | int pid = ptid_get_pid (inferior_ptid); |
| 9353 | struct remote_state *rs = get_remote_state (); |
| 9354 | |
| 9355 | if (packet_support (PACKET_vKill) != PACKET_DISABLE) |
| 9356 | { |
| 9357 | /* If we're stopped while forking and we haven't followed yet, |
| 9358 | kill the child task. We need to do this before killing the |
| 9359 | parent task because if this is a vfork then the parent will |
| 9360 | be sleeping. */ |
| 9361 | kill_new_fork_children (pid, rs); |
| 9362 | |
| 9363 | res = remote_vkill (pid, rs); |
| 9364 | if (res == 0) |
| 9365 | { |
| 9366 | target_mourn_inferior (inferior_ptid); |
| 9367 | return; |
| 9368 | } |
| 9369 | } |
| 9370 | |
| 9371 | /* If we are in 'target remote' mode and we are killing the only |
| 9372 | inferior, then we will tell gdbserver to exit and unpush the |
| 9373 | target. */ |
| 9374 | if (res == -1 && !remote_multi_process_p (rs) |
| 9375 | && number_of_live_inferiors () == 1) |
| 9376 | { |
| 9377 | remote_kill_k (); |
| 9378 | |
| 9379 | /* We've killed the remote end, we get to mourn it. If we are |
| 9380 | not in extended mode, mourning the inferior also unpushes |
| 9381 | remote_ops from the target stack, which closes the remote |
| 9382 | connection. */ |
| 9383 | target_mourn_inferior (inferior_ptid); |
| 9384 | |
| 9385 | return; |
| 9386 | } |
| 9387 | |
| 9388 | error (_("Can't kill process")); |
| 9389 | } |
| 9390 | |
| 9391 | /* Send a kill request to the target using the 'vKill' packet. */ |
| 9392 | |
| 9393 | static int |
| 9394 | remote_vkill (int pid, struct remote_state *rs) |
| 9395 | { |
| 9396 | if (packet_support (PACKET_vKill) == PACKET_DISABLE) |
| 9397 | return -1; |
| 9398 | |
| 9399 | /* Tell the remote target to detach. */ |
| 9400 | xsnprintf (rs->buf, get_remote_packet_size (), "vKill;%x", pid); |
| 9401 | putpkt (rs->buf); |
| 9402 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 9403 | |
| 9404 | switch (packet_ok (rs->buf, |
| 9405 | &remote_protocol_packets[PACKET_vKill])) |
| 9406 | { |
| 9407 | case PACKET_OK: |
| 9408 | return 0; |
| 9409 | case PACKET_ERROR: |
| 9410 | return 1; |
| 9411 | case PACKET_UNKNOWN: |
| 9412 | return -1; |
| 9413 | default: |
| 9414 | internal_error (__FILE__, __LINE__, _("Bad result from packet_ok")); |
| 9415 | } |
| 9416 | } |
| 9417 | |
| 9418 | /* Send a kill request to the target using the 'k' packet. */ |
| 9419 | |
| 9420 | static void |
| 9421 | remote_kill_k (void) |
| 9422 | { |
| 9423 | /* Catch errors so the user can quit from gdb even when we |
| 9424 | aren't on speaking terms with the remote system. */ |
| 9425 | TRY |
| 9426 | { |
| 9427 | putpkt ("k"); |
| 9428 | } |
| 9429 | CATCH (ex, RETURN_MASK_ERROR) |
| 9430 | { |
| 9431 | if (ex.error == TARGET_CLOSE_ERROR) |
| 9432 | { |
| 9433 | /* If we got an (EOF) error that caused the target |
| 9434 | to go away, then we're done, that's what we wanted. |
| 9435 | "k" is susceptible to cause a premature EOF, given |
| 9436 | that the remote server isn't actually required to |
| 9437 | reply to "k", and it can happen that it doesn't |
| 9438 | even get to reply ACK to the "k". */ |
| 9439 | return; |
| 9440 | } |
| 9441 | |
| 9442 | /* Otherwise, something went wrong. We didn't actually kill |
| 9443 | the target. Just propagate the exception, and let the |
| 9444 | user or higher layers decide what to do. */ |
| 9445 | throw_exception (ex); |
| 9446 | } |
| 9447 | END_CATCH |
| 9448 | } |
| 9449 | |
| 9450 | static void |
| 9451 | remote_mourn (struct target_ops *target) |
| 9452 | { |
| 9453 | struct remote_state *rs = get_remote_state (); |
| 9454 | |
| 9455 | /* In 'target remote' mode with one inferior, we close the connection. */ |
| 9456 | if (!rs->extended && number_of_live_inferiors () <= 1) |
| 9457 | { |
| 9458 | unpush_target (target); |
| 9459 | |
| 9460 | /* remote_close takes care of doing most of the clean up. */ |
| 9461 | generic_mourn_inferior (); |
| 9462 | return; |
| 9463 | } |
| 9464 | |
| 9465 | /* In case we got here due to an error, but we're going to stay |
| 9466 | connected. */ |
| 9467 | rs->waiting_for_stop_reply = 0; |
| 9468 | |
| 9469 | /* If the current general thread belonged to the process we just |
| 9470 | detached from or has exited, the remote side current general |
| 9471 | thread becomes undefined. Considering a case like this: |
| 9472 | |
| 9473 | - We just got here due to a detach. |
| 9474 | - The process that we're detaching from happens to immediately |
| 9475 | report a global breakpoint being hit in non-stop mode, in the |
| 9476 | same thread we had selected before. |
| 9477 | - GDB attaches to this process again. |
| 9478 | - This event happens to be the next event we handle. |
| 9479 | |
| 9480 | GDB would consider that the current general thread didn't need to |
| 9481 | be set on the stub side (with Hg), since for all it knew, |
| 9482 | GENERAL_THREAD hadn't changed. |
| 9483 | |
| 9484 | Notice that although in all-stop mode, the remote server always |
| 9485 | sets the current thread to the thread reporting the stop event, |
| 9486 | that doesn't happen in non-stop mode; in non-stop, the stub *must |
| 9487 | not* change the current thread when reporting a breakpoint hit, |
| 9488 | due to the decoupling of event reporting and event handling. |
| 9489 | |
| 9490 | To keep things simple, we always invalidate our notion of the |
| 9491 | current thread. */ |
| 9492 | record_currthread (rs, minus_one_ptid); |
| 9493 | |
| 9494 | /* Call common code to mark the inferior as not running. */ |
| 9495 | generic_mourn_inferior (); |
| 9496 | |
| 9497 | if (!have_inferiors ()) |
| 9498 | { |
| 9499 | if (!remote_multi_process_p (rs)) |
| 9500 | { |
| 9501 | /* Check whether the target is running now - some remote stubs |
| 9502 | automatically restart after kill. */ |
| 9503 | putpkt ("?"); |
| 9504 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 9505 | |
| 9506 | if (rs->buf[0] == 'S' || rs->buf[0] == 'T') |
| 9507 | { |
| 9508 | /* Assume that the target has been restarted. Set |
| 9509 | inferior_ptid so that bits of core GDB realizes |
| 9510 | there's something here, e.g., so that the user can |
| 9511 | say "kill" again. */ |
| 9512 | inferior_ptid = magic_null_ptid; |
| 9513 | } |
| 9514 | } |
| 9515 | } |
| 9516 | } |
| 9517 | |
| 9518 | static int |
| 9519 | extended_remote_supports_disable_randomization (struct target_ops *self) |
| 9520 | { |
| 9521 | return packet_support (PACKET_QDisableRandomization) == PACKET_ENABLE; |
| 9522 | } |
| 9523 | |
| 9524 | static void |
| 9525 | extended_remote_disable_randomization (int val) |
| 9526 | { |
| 9527 | struct remote_state *rs = get_remote_state (); |
| 9528 | char *reply; |
| 9529 | |
| 9530 | xsnprintf (rs->buf, get_remote_packet_size (), "QDisableRandomization:%x", |
| 9531 | val); |
| 9532 | putpkt (rs->buf); |
| 9533 | reply = remote_get_noisy_reply (); |
| 9534 | if (*reply == '\0') |
| 9535 | error (_("Target does not support QDisableRandomization.")); |
| 9536 | if (strcmp (reply, "OK") != 0) |
| 9537 | error (_("Bogus QDisableRandomization reply from target: %s"), reply); |
| 9538 | } |
| 9539 | |
| 9540 | static int |
| 9541 | extended_remote_run (const std::string &args) |
| 9542 | { |
| 9543 | struct remote_state *rs = get_remote_state (); |
| 9544 | int len; |
| 9545 | const char *remote_exec_file = get_remote_exec_file (); |
| 9546 | |
| 9547 | /* If the user has disabled vRun support, or we have detected that |
| 9548 | support is not available, do not try it. */ |
| 9549 | if (packet_support (PACKET_vRun) == PACKET_DISABLE) |
| 9550 | return -1; |
| 9551 | |
| 9552 | strcpy (rs->buf, "vRun;"); |
| 9553 | len = strlen (rs->buf); |
| 9554 | |
| 9555 | if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ()) |
| 9556 | error (_("Remote file name too long for run packet")); |
| 9557 | len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, |
| 9558 | strlen (remote_exec_file)); |
| 9559 | |
| 9560 | if (!args.empty ()) |
| 9561 | { |
| 9562 | int i; |
| 9563 | |
| 9564 | gdb_argv argv (args.c_str ()); |
| 9565 | for (i = 0; argv[i] != NULL; i++) |
| 9566 | { |
| 9567 | if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ()) |
| 9568 | error (_("Argument list too long for run packet")); |
| 9569 | rs->buf[len++] = ';'; |
| 9570 | len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, |
| 9571 | strlen (argv[i])); |
| 9572 | } |
| 9573 | } |
| 9574 | |
| 9575 | rs->buf[len++] = '\0'; |
| 9576 | |
| 9577 | putpkt (rs->buf); |
| 9578 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 9579 | |
| 9580 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun])) |
| 9581 | { |
| 9582 | case PACKET_OK: |
| 9583 | /* We have a wait response. All is well. */ |
| 9584 | return 0; |
| 9585 | case PACKET_UNKNOWN: |
| 9586 | return -1; |
| 9587 | case PACKET_ERROR: |
| 9588 | if (remote_exec_file[0] == '\0') |
| 9589 | error (_("Running the default executable on the remote target failed; " |
| 9590 | "try \"set remote exec-file\"?")); |
| 9591 | else |
| 9592 | error (_("Running \"%s\" on the remote target failed"), |
| 9593 | remote_exec_file); |
| 9594 | default: |
| 9595 | gdb_assert_not_reached (_("bad switch")); |
| 9596 | } |
| 9597 | } |
| 9598 | |
| 9599 | /* Helper function to send set/unset environment packets. ACTION is |
| 9600 | either "set" or "unset". PACKET is either "QEnvironmentHexEncoded" |
| 9601 | or "QEnvironmentUnsetVariable". VALUE is the variable to be |
| 9602 | sent. */ |
| 9603 | |
| 9604 | static void |
| 9605 | send_environment_packet (struct remote_state *rs, |
| 9606 | const char *action, |
| 9607 | const char *packet, |
| 9608 | const char *value) |
| 9609 | { |
| 9610 | /* Convert the environment variable to an hex string, which |
| 9611 | is the best format to be transmitted over the wire. */ |
| 9612 | std::string encoded_value = bin2hex ((const gdb_byte *) value, |
| 9613 | strlen (value)); |
| 9614 | |
| 9615 | xsnprintf (rs->buf, get_remote_packet_size (), |
| 9616 | "%s:%s", packet, encoded_value.c_str ()); |
| 9617 | |
| 9618 | putpkt (rs->buf); |
| 9619 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 9620 | if (strcmp (rs->buf, "OK") != 0) |
| 9621 | warning (_("Unable to %s environment variable '%s' on remote."), |
| 9622 | action, value); |
| 9623 | } |
| 9624 | |
| 9625 | /* Helper function to handle the QEnvironment* packets. */ |
| 9626 | |
| 9627 | static void |
| 9628 | extended_remote_environment_support (struct remote_state *rs) |
| 9629 | { |
| 9630 | if (packet_support (PACKET_QEnvironmentReset) != PACKET_DISABLE) |
| 9631 | { |
| 9632 | putpkt ("QEnvironmentReset"); |
| 9633 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 9634 | if (strcmp (rs->buf, "OK") != 0) |
| 9635 | warning (_("Unable to reset environment on remote.")); |
| 9636 | } |
| 9637 | |
| 9638 | gdb_environ *e = ¤t_inferior ()->environment; |
| 9639 | |
| 9640 | if (packet_support (PACKET_QEnvironmentHexEncoded) != PACKET_DISABLE) |
| 9641 | for (const std::string &el : e->user_set_env ()) |
| 9642 | send_environment_packet (rs, "set", "QEnvironmentHexEncoded", |
| 9643 | el.c_str ()); |
| 9644 | |
| 9645 | if (packet_support (PACKET_QEnvironmentUnset) != PACKET_DISABLE) |
| 9646 | for (const std::string &el : e->user_unset_env ()) |
| 9647 | send_environment_packet (rs, "unset", "QEnvironmentUnset", el.c_str ()); |
| 9648 | } |
| 9649 | |
| 9650 | /* Helper function to set the current working directory for the |
| 9651 | inferior in the remote target. */ |
| 9652 | |
| 9653 | static void |
| 9654 | extended_remote_set_inferior_cwd (struct remote_state *rs) |
| 9655 | { |
| 9656 | if (packet_support (PACKET_QSetWorkingDir) != PACKET_DISABLE) |
| 9657 | { |
| 9658 | const char *inferior_cwd = get_inferior_cwd (); |
| 9659 | |
| 9660 | if (inferior_cwd != NULL) |
| 9661 | { |
| 9662 | std::string hexpath = bin2hex ((const gdb_byte *) inferior_cwd, |
| 9663 | strlen (inferior_cwd)); |
| 9664 | |
| 9665 | xsnprintf (rs->buf, get_remote_packet_size (), |
| 9666 | "QSetWorkingDir:%s", hexpath.c_str ()); |
| 9667 | } |
| 9668 | else |
| 9669 | { |
| 9670 | /* An empty inferior_cwd means that the user wants us to |
| 9671 | reset the remote server's inferior's cwd. */ |
| 9672 | xsnprintf (rs->buf, get_remote_packet_size (), |
| 9673 | "QSetWorkingDir:"); |
| 9674 | } |
| 9675 | |
| 9676 | putpkt (rs->buf); |
| 9677 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 9678 | if (packet_ok (rs->buf, |
| 9679 | &remote_protocol_packets[PACKET_QSetWorkingDir]) |
| 9680 | != PACKET_OK) |
| 9681 | error (_("\ |
| 9682 | Remote replied unexpectedly while setting the inferior's working\n\ |
| 9683 | directory: %s"), |
| 9684 | rs->buf); |
| 9685 | |
| 9686 | } |
| 9687 | } |
| 9688 | |
| 9689 | /* In the extended protocol we want to be able to do things like |
| 9690 | "run" and have them basically work as expected. So we need |
| 9691 | a special create_inferior function. We support changing the |
| 9692 | executable file and the command line arguments, but not the |
| 9693 | environment. */ |
| 9694 | |
| 9695 | static void |
| 9696 | extended_remote_create_inferior (struct target_ops *ops, |
| 9697 | const char *exec_file, |
| 9698 | const std::string &args, |
| 9699 | char **env, int from_tty) |
| 9700 | { |
| 9701 | int run_worked; |
| 9702 | char *stop_reply; |
| 9703 | struct remote_state *rs = get_remote_state (); |
| 9704 | const char *remote_exec_file = get_remote_exec_file (); |
| 9705 | |
| 9706 | /* If running asynchronously, register the target file descriptor |
| 9707 | with the event loop. */ |
| 9708 | if (target_can_async_p ()) |
| 9709 | target_async (1); |
| 9710 | |
| 9711 | /* Disable address space randomization if requested (and supported). */ |
| 9712 | if (extended_remote_supports_disable_randomization (ops)) |
| 9713 | extended_remote_disable_randomization (disable_randomization); |
| 9714 | |
| 9715 | /* If startup-with-shell is on, we inform gdbserver to start the |
| 9716 | remote inferior using a shell. */ |
| 9717 | if (packet_support (PACKET_QStartupWithShell) != PACKET_DISABLE) |
| 9718 | { |
| 9719 | xsnprintf (rs->buf, get_remote_packet_size (), |
| 9720 | "QStartupWithShell:%d", startup_with_shell ? 1 : 0); |
| 9721 | putpkt (rs->buf); |
| 9722 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 9723 | if (strcmp (rs->buf, "OK") != 0) |
| 9724 | error (_("\ |
| 9725 | Remote replied unexpectedly while setting startup-with-shell: %s"), |
| 9726 | rs->buf); |
| 9727 | } |
| 9728 | |
| 9729 | extended_remote_environment_support (rs); |
| 9730 | |
| 9731 | extended_remote_set_inferior_cwd (rs); |
| 9732 | |
| 9733 | /* Now restart the remote server. */ |
| 9734 | run_worked = extended_remote_run (args) != -1; |
| 9735 | if (!run_worked) |
| 9736 | { |
| 9737 | /* vRun was not supported. Fail if we need it to do what the |
| 9738 | user requested. */ |
| 9739 | if (remote_exec_file[0]) |
| 9740 | error (_("Remote target does not support \"set remote exec-file\"")); |
| 9741 | if (!args.empty ()) |
| 9742 | error (_("Remote target does not support \"set args\" or run <ARGS>")); |
| 9743 | |
| 9744 | /* Fall back to "R". */ |
| 9745 | extended_remote_restart (); |
| 9746 | } |
| 9747 | |
| 9748 | if (!have_inferiors ()) |
| 9749 | { |
| 9750 | /* Clean up from the last time we ran, before we mark the target |
| 9751 | running again. This will mark breakpoints uninserted, and |
| 9752 | get_offsets may insert breakpoints. */ |
| 9753 | init_thread_list (); |
| 9754 | init_wait_for_inferior (); |
| 9755 | } |
| 9756 | |
| 9757 | /* vRun's success return is a stop reply. */ |
| 9758 | stop_reply = run_worked ? rs->buf : NULL; |
| 9759 | add_current_inferior_and_thread (stop_reply); |
| 9760 | |
| 9761 | /* Get updated offsets, if the stub uses qOffsets. */ |
| 9762 | get_offsets (); |
| 9763 | } |
| 9764 | \f |
| 9765 | |
| 9766 | /* Given a location's target info BP_TGT and the packet buffer BUF, output |
| 9767 | the list of conditions (in agent expression bytecode format), if any, the |
| 9768 | target needs to evaluate. The output is placed into the packet buffer |
| 9769 | started from BUF and ended at BUF_END. */ |
| 9770 | |
| 9771 | static int |
| 9772 | remote_add_target_side_condition (struct gdbarch *gdbarch, |
| 9773 | struct bp_target_info *bp_tgt, char *buf, |
| 9774 | char *buf_end) |
| 9775 | { |
| 9776 | if (bp_tgt->conditions.empty ()) |
| 9777 | return 0; |
| 9778 | |
| 9779 | buf += strlen (buf); |
| 9780 | xsnprintf (buf, buf_end - buf, "%s", ";"); |
| 9781 | buf++; |
| 9782 | |
| 9783 | /* Send conditions to the target. */ |
| 9784 | for (agent_expr *aexpr : bp_tgt->conditions) |
| 9785 | { |
| 9786 | xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len); |
| 9787 | buf += strlen (buf); |
| 9788 | for (int i = 0; i < aexpr->len; ++i) |
| 9789 | buf = pack_hex_byte (buf, aexpr->buf[i]); |
| 9790 | *buf = '\0'; |
| 9791 | } |
| 9792 | return 0; |
| 9793 | } |
| 9794 | |
| 9795 | static void |
| 9796 | remote_add_target_side_commands (struct gdbarch *gdbarch, |
| 9797 | struct bp_target_info *bp_tgt, char *buf) |
| 9798 | { |
| 9799 | if (bp_tgt->tcommands.empty ()) |
| 9800 | return; |
| 9801 | |
| 9802 | buf += strlen (buf); |
| 9803 | |
| 9804 | sprintf (buf, ";cmds:%x,", bp_tgt->persist); |
| 9805 | buf += strlen (buf); |
| 9806 | |
| 9807 | /* Concatenate all the agent expressions that are commands into the |
| 9808 | cmds parameter. */ |
| 9809 | for (agent_expr *aexpr : bp_tgt->tcommands) |
| 9810 | { |
| 9811 | sprintf (buf, "X%x,", aexpr->len); |
| 9812 | buf += strlen (buf); |
| 9813 | for (int i = 0; i < aexpr->len; ++i) |
| 9814 | buf = pack_hex_byte (buf, aexpr->buf[i]); |
| 9815 | *buf = '\0'; |
| 9816 | } |
| 9817 | } |
| 9818 | |
| 9819 | /* Insert a breakpoint. On targets that have software breakpoint |
| 9820 | support, we ask the remote target to do the work; on targets |
| 9821 | which don't, we insert a traditional memory breakpoint. */ |
| 9822 | |
| 9823 | static int |
| 9824 | remote_insert_breakpoint (struct target_ops *ops, |
| 9825 | struct gdbarch *gdbarch, |
| 9826 | struct bp_target_info *bp_tgt) |
| 9827 | { |
| 9828 | /* Try the "Z" s/w breakpoint packet if it is not already disabled. |
| 9829 | If it succeeds, then set the support to PACKET_ENABLE. If it |
| 9830 | fails, and the user has explicitly requested the Z support then |
| 9831 | report an error, otherwise, mark it disabled and go on. */ |
| 9832 | |
| 9833 | if (packet_support (PACKET_Z0) != PACKET_DISABLE) |
| 9834 | { |
| 9835 | CORE_ADDR addr = bp_tgt->reqstd_address; |
| 9836 | struct remote_state *rs; |
| 9837 | char *p, *endbuf; |
| 9838 | int bpsize; |
| 9839 | |
| 9840 | /* Make sure the remote is pointing at the right process, if |
| 9841 | necessary. */ |
| 9842 | if (!gdbarch_has_global_breakpoints (target_gdbarch ())) |
| 9843 | set_general_process (); |
| 9844 | |
| 9845 | rs = get_remote_state (); |
| 9846 | p = rs->buf; |
| 9847 | endbuf = rs->buf + get_remote_packet_size (); |
| 9848 | |
| 9849 | *(p++) = 'Z'; |
| 9850 | *(p++) = '0'; |
| 9851 | *(p++) = ','; |
| 9852 | addr = (ULONGEST) remote_address_masked (addr); |
| 9853 | p += hexnumstr (p, addr); |
| 9854 | xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind); |
| 9855 | |
| 9856 | if (remote_supports_cond_breakpoints (ops)) |
| 9857 | remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf); |
| 9858 | |
| 9859 | if (remote_can_run_breakpoint_commands (ops)) |
| 9860 | remote_add_target_side_commands (gdbarch, bp_tgt, p); |
| 9861 | |
| 9862 | putpkt (rs->buf); |
| 9863 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 9864 | |
| 9865 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0])) |
| 9866 | { |
| 9867 | case PACKET_ERROR: |
| 9868 | return -1; |
| 9869 | case PACKET_OK: |
| 9870 | return 0; |
| 9871 | case PACKET_UNKNOWN: |
| 9872 | break; |
| 9873 | } |
| 9874 | } |
| 9875 | |
| 9876 | /* If this breakpoint has target-side commands but this stub doesn't |
| 9877 | support Z0 packets, throw error. */ |
| 9878 | if (!bp_tgt->tcommands.empty ()) |
| 9879 | throw_error (NOT_SUPPORTED_ERROR, _("\ |
| 9880 | Target doesn't support breakpoints that have target side commands.")); |
| 9881 | |
| 9882 | return memory_insert_breakpoint (ops, gdbarch, bp_tgt); |
| 9883 | } |
| 9884 | |
| 9885 | static int |
| 9886 | remote_remove_breakpoint (struct target_ops *ops, |
| 9887 | struct gdbarch *gdbarch, |
| 9888 | struct bp_target_info *bp_tgt, |
| 9889 | enum remove_bp_reason reason) |
| 9890 | { |
| 9891 | CORE_ADDR addr = bp_tgt->placed_address; |
| 9892 | struct remote_state *rs = get_remote_state (); |
| 9893 | |
| 9894 | if (packet_support (PACKET_Z0) != PACKET_DISABLE) |
| 9895 | { |
| 9896 | char *p = rs->buf; |
| 9897 | char *endbuf = rs->buf + get_remote_packet_size (); |
| 9898 | |
| 9899 | /* Make sure the remote is pointing at the right process, if |
| 9900 | necessary. */ |
| 9901 | if (!gdbarch_has_global_breakpoints (target_gdbarch ())) |
| 9902 | set_general_process (); |
| 9903 | |
| 9904 | *(p++) = 'z'; |
| 9905 | *(p++) = '0'; |
| 9906 | *(p++) = ','; |
| 9907 | |
| 9908 | addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address); |
| 9909 | p += hexnumstr (p, addr); |
| 9910 | xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind); |
| 9911 | |
| 9912 | putpkt (rs->buf); |
| 9913 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 9914 | |
| 9915 | return (rs->buf[0] == 'E'); |
| 9916 | } |
| 9917 | |
| 9918 | return memory_remove_breakpoint (ops, gdbarch, bp_tgt, reason); |
| 9919 | } |
| 9920 | |
| 9921 | static enum Z_packet_type |
| 9922 | watchpoint_to_Z_packet (int type) |
| 9923 | { |
| 9924 | switch (type) |
| 9925 | { |
| 9926 | case hw_write: |
| 9927 | return Z_PACKET_WRITE_WP; |
| 9928 | break; |
| 9929 | case hw_read: |
| 9930 | return Z_PACKET_READ_WP; |
| 9931 | break; |
| 9932 | case hw_access: |
| 9933 | return Z_PACKET_ACCESS_WP; |
| 9934 | break; |
| 9935 | default: |
| 9936 | internal_error (__FILE__, __LINE__, |
| 9937 | _("hw_bp_to_z: bad watchpoint type %d"), type); |
| 9938 | } |
| 9939 | } |
| 9940 | |
| 9941 | static int |
| 9942 | remote_insert_watchpoint (struct target_ops *self, CORE_ADDR addr, int len, |
| 9943 | enum target_hw_bp_type type, struct expression *cond) |
| 9944 | { |
| 9945 | struct remote_state *rs = get_remote_state (); |
| 9946 | char *endbuf = rs->buf + get_remote_packet_size (); |
| 9947 | char *p; |
| 9948 | enum Z_packet_type packet = watchpoint_to_Z_packet (type); |
| 9949 | |
| 9950 | if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE) |
| 9951 | return 1; |
| 9952 | |
| 9953 | /* Make sure the remote is pointing at the right process, if |
| 9954 | necessary. */ |
| 9955 | if (!gdbarch_has_global_breakpoints (target_gdbarch ())) |
| 9956 | set_general_process (); |
| 9957 | |
| 9958 | xsnprintf (rs->buf, endbuf - rs->buf, "Z%x,", packet); |
| 9959 | p = strchr (rs->buf, '\0'); |
| 9960 | addr = remote_address_masked (addr); |
| 9961 | p += hexnumstr (p, (ULONGEST) addr); |
| 9962 | xsnprintf (p, endbuf - p, ",%x", len); |
| 9963 | |
| 9964 | putpkt (rs->buf); |
| 9965 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 9966 | |
| 9967 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet])) |
| 9968 | { |
| 9969 | case PACKET_ERROR: |
| 9970 | return -1; |
| 9971 | case PACKET_UNKNOWN: |
| 9972 | return 1; |
| 9973 | case PACKET_OK: |
| 9974 | return 0; |
| 9975 | } |
| 9976 | internal_error (__FILE__, __LINE__, |
| 9977 | _("remote_insert_watchpoint: reached end of function")); |
| 9978 | } |
| 9979 | |
| 9980 | static int |
| 9981 | remote_watchpoint_addr_within_range (struct target_ops *target, CORE_ADDR addr, |
| 9982 | CORE_ADDR start, int length) |
| 9983 | { |
| 9984 | CORE_ADDR diff = remote_address_masked (addr - start); |
| 9985 | |
| 9986 | return diff < length; |
| 9987 | } |
| 9988 | |
| 9989 | |
| 9990 | static int |
| 9991 | remote_remove_watchpoint (struct target_ops *self, CORE_ADDR addr, int len, |
| 9992 | enum target_hw_bp_type type, struct expression *cond) |
| 9993 | { |
| 9994 | struct remote_state *rs = get_remote_state (); |
| 9995 | char *endbuf = rs->buf + get_remote_packet_size (); |
| 9996 | char *p; |
| 9997 | enum Z_packet_type packet = watchpoint_to_Z_packet (type); |
| 9998 | |
| 9999 | if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE) |
| 10000 | return -1; |
| 10001 | |
| 10002 | /* Make sure the remote is pointing at the right process, if |
| 10003 | necessary. */ |
| 10004 | if (!gdbarch_has_global_breakpoints (target_gdbarch ())) |
| 10005 | set_general_process (); |
| 10006 | |
| 10007 | xsnprintf (rs->buf, endbuf - rs->buf, "z%x,", packet); |
| 10008 | p = strchr (rs->buf, '\0'); |
| 10009 | addr = remote_address_masked (addr); |
| 10010 | p += hexnumstr (p, (ULONGEST) addr); |
| 10011 | xsnprintf (p, endbuf - p, ",%x", len); |
| 10012 | putpkt (rs->buf); |
| 10013 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 10014 | |
| 10015 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet])) |
| 10016 | { |
| 10017 | case PACKET_ERROR: |
| 10018 | case PACKET_UNKNOWN: |
| 10019 | return -1; |
| 10020 | case PACKET_OK: |
| 10021 | return 0; |
| 10022 | } |
| 10023 | internal_error (__FILE__, __LINE__, |
| 10024 | _("remote_remove_watchpoint: reached end of function")); |
| 10025 | } |
| 10026 | |
| 10027 | |
| 10028 | int remote_hw_watchpoint_limit = -1; |
| 10029 | int remote_hw_watchpoint_length_limit = -1; |
| 10030 | int remote_hw_breakpoint_limit = -1; |
| 10031 | |
| 10032 | static int |
| 10033 | remote_region_ok_for_hw_watchpoint (struct target_ops *self, |
| 10034 | CORE_ADDR addr, int len) |
| 10035 | { |
| 10036 | if (remote_hw_watchpoint_length_limit == 0) |
| 10037 | return 0; |
| 10038 | else if (remote_hw_watchpoint_length_limit < 0) |
| 10039 | return 1; |
| 10040 | else if (len <= remote_hw_watchpoint_length_limit) |
| 10041 | return 1; |
| 10042 | else |
| 10043 | return 0; |
| 10044 | } |
| 10045 | |
| 10046 | static int |
| 10047 | remote_check_watch_resources (struct target_ops *self, |
| 10048 | enum bptype type, int cnt, int ot) |
| 10049 | { |
| 10050 | if (type == bp_hardware_breakpoint) |
| 10051 | { |
| 10052 | if (remote_hw_breakpoint_limit == 0) |
| 10053 | return 0; |
| 10054 | else if (remote_hw_breakpoint_limit < 0) |
| 10055 | return 1; |
| 10056 | else if (cnt <= remote_hw_breakpoint_limit) |
| 10057 | return 1; |
| 10058 | } |
| 10059 | else |
| 10060 | { |
| 10061 | if (remote_hw_watchpoint_limit == 0) |
| 10062 | return 0; |
| 10063 | else if (remote_hw_watchpoint_limit < 0) |
| 10064 | return 1; |
| 10065 | else if (ot) |
| 10066 | return -1; |
| 10067 | else if (cnt <= remote_hw_watchpoint_limit) |
| 10068 | return 1; |
| 10069 | } |
| 10070 | return -1; |
| 10071 | } |
| 10072 | |
| 10073 | /* The to_stopped_by_sw_breakpoint method of target remote. */ |
| 10074 | |
| 10075 | static int |
| 10076 | remote_stopped_by_sw_breakpoint (struct target_ops *ops) |
| 10077 | { |
| 10078 | struct thread_info *thread = inferior_thread (); |
| 10079 | |
| 10080 | return (thread->priv != NULL |
| 10081 | && thread->priv->stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT); |
| 10082 | } |
| 10083 | |
| 10084 | /* The to_supports_stopped_by_sw_breakpoint method of target |
| 10085 | remote. */ |
| 10086 | |
| 10087 | static int |
| 10088 | remote_supports_stopped_by_sw_breakpoint (struct target_ops *ops) |
| 10089 | { |
| 10090 | return (packet_support (PACKET_swbreak_feature) == PACKET_ENABLE); |
| 10091 | } |
| 10092 | |
| 10093 | /* The to_stopped_by_hw_breakpoint method of target remote. */ |
| 10094 | |
| 10095 | static int |
| 10096 | remote_stopped_by_hw_breakpoint (struct target_ops *ops) |
| 10097 | { |
| 10098 | struct thread_info *thread = inferior_thread (); |
| 10099 | |
| 10100 | return (thread->priv != NULL |
| 10101 | && thread->priv->stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT); |
| 10102 | } |
| 10103 | |
| 10104 | /* The to_supports_stopped_by_hw_breakpoint method of target |
| 10105 | remote. */ |
| 10106 | |
| 10107 | static int |
| 10108 | remote_supports_stopped_by_hw_breakpoint (struct target_ops *ops) |
| 10109 | { |
| 10110 | return (packet_support (PACKET_hwbreak_feature) == PACKET_ENABLE); |
| 10111 | } |
| 10112 | |
| 10113 | static int |
| 10114 | remote_stopped_by_watchpoint (struct target_ops *ops) |
| 10115 | { |
| 10116 | struct thread_info *thread = inferior_thread (); |
| 10117 | |
| 10118 | return (thread->priv != NULL |
| 10119 | && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT); |
| 10120 | } |
| 10121 | |
| 10122 | static int |
| 10123 | remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p) |
| 10124 | { |
| 10125 | struct thread_info *thread = inferior_thread (); |
| 10126 | |
| 10127 | if (thread->priv != NULL |
| 10128 | && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT) |
| 10129 | { |
| 10130 | *addr_p = thread->priv->watch_data_address; |
| 10131 | return 1; |
| 10132 | } |
| 10133 | |
| 10134 | return 0; |
| 10135 | } |
| 10136 | |
| 10137 | |
| 10138 | static int |
| 10139 | remote_insert_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch, |
| 10140 | struct bp_target_info *bp_tgt) |
| 10141 | { |
| 10142 | CORE_ADDR addr = bp_tgt->reqstd_address; |
| 10143 | struct remote_state *rs; |
| 10144 | char *p, *endbuf; |
| 10145 | char *message; |
| 10146 | |
| 10147 | if (packet_support (PACKET_Z1) == PACKET_DISABLE) |
| 10148 | return -1; |
| 10149 | |
| 10150 | /* Make sure the remote is pointing at the right process, if |
| 10151 | necessary. */ |
| 10152 | if (!gdbarch_has_global_breakpoints (target_gdbarch ())) |
| 10153 | set_general_process (); |
| 10154 | |
| 10155 | rs = get_remote_state (); |
| 10156 | p = rs->buf; |
| 10157 | endbuf = rs->buf + get_remote_packet_size (); |
| 10158 | |
| 10159 | *(p++) = 'Z'; |
| 10160 | *(p++) = '1'; |
| 10161 | *(p++) = ','; |
| 10162 | |
| 10163 | addr = remote_address_masked (addr); |
| 10164 | p += hexnumstr (p, (ULONGEST) addr); |
| 10165 | xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind); |
| 10166 | |
| 10167 | if (remote_supports_cond_breakpoints (self)) |
| 10168 | remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf); |
| 10169 | |
| 10170 | if (remote_can_run_breakpoint_commands (self)) |
| 10171 | remote_add_target_side_commands (gdbarch, bp_tgt, p); |
| 10172 | |
| 10173 | putpkt (rs->buf); |
| 10174 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 10175 | |
| 10176 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1])) |
| 10177 | { |
| 10178 | case PACKET_ERROR: |
| 10179 | if (rs->buf[1] == '.') |
| 10180 | { |
| 10181 | message = strchr (rs->buf + 2, '.'); |
| 10182 | if (message) |
| 10183 | error (_("Remote failure reply: %s"), message + 1); |
| 10184 | } |
| 10185 | return -1; |
| 10186 | case PACKET_UNKNOWN: |
| 10187 | return -1; |
| 10188 | case PACKET_OK: |
| 10189 | return 0; |
| 10190 | } |
| 10191 | internal_error (__FILE__, __LINE__, |
| 10192 | _("remote_insert_hw_breakpoint: reached end of function")); |
| 10193 | } |
| 10194 | |
| 10195 | |
| 10196 | static int |
| 10197 | remote_remove_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch, |
| 10198 | struct bp_target_info *bp_tgt) |
| 10199 | { |
| 10200 | CORE_ADDR addr; |
| 10201 | struct remote_state *rs = get_remote_state (); |
| 10202 | char *p = rs->buf; |
| 10203 | char *endbuf = rs->buf + get_remote_packet_size (); |
| 10204 | |
| 10205 | if (packet_support (PACKET_Z1) == PACKET_DISABLE) |
| 10206 | return -1; |
| 10207 | |
| 10208 | /* Make sure the remote is pointing at the right process, if |
| 10209 | necessary. */ |
| 10210 | if (!gdbarch_has_global_breakpoints (target_gdbarch ())) |
| 10211 | set_general_process (); |
| 10212 | |
| 10213 | *(p++) = 'z'; |
| 10214 | *(p++) = '1'; |
| 10215 | *(p++) = ','; |
| 10216 | |
| 10217 | addr = remote_address_masked (bp_tgt->placed_address); |
| 10218 | p += hexnumstr (p, (ULONGEST) addr); |
| 10219 | xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind); |
| 10220 | |
| 10221 | putpkt (rs->buf); |
| 10222 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 10223 | |
| 10224 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1])) |
| 10225 | { |
| 10226 | case PACKET_ERROR: |
| 10227 | case PACKET_UNKNOWN: |
| 10228 | return -1; |
| 10229 | case PACKET_OK: |
| 10230 | return 0; |
| 10231 | } |
| 10232 | internal_error (__FILE__, __LINE__, |
| 10233 | _("remote_remove_hw_breakpoint: reached end of function")); |
| 10234 | } |
| 10235 | |
| 10236 | /* Verify memory using the "qCRC:" request. */ |
| 10237 | |
| 10238 | static int |
| 10239 | remote_verify_memory (struct target_ops *ops, |
| 10240 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) |
| 10241 | { |
| 10242 | struct remote_state *rs = get_remote_state (); |
| 10243 | unsigned long host_crc, target_crc; |
| 10244 | char *tmp; |
| 10245 | |
| 10246 | /* It doesn't make sense to use qCRC if the remote target is |
| 10247 | connected but not running. */ |
| 10248 | if (target_has_execution && packet_support (PACKET_qCRC) != PACKET_DISABLE) |
| 10249 | { |
| 10250 | enum packet_result result; |
| 10251 | |
| 10252 | /* Make sure the remote is pointing at the right process. */ |
| 10253 | set_general_process (); |
| 10254 | |
| 10255 | /* FIXME: assumes lma can fit into long. */ |
| 10256 | xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx", |
| 10257 | (long) lma, (long) size); |
| 10258 | putpkt (rs->buf); |
| 10259 | |
| 10260 | /* Be clever; compute the host_crc before waiting for target |
| 10261 | reply. */ |
| 10262 | host_crc = xcrc32 (data, size, 0xffffffff); |
| 10263 | |
| 10264 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 10265 | |
| 10266 | result = packet_ok (rs->buf, |
| 10267 | &remote_protocol_packets[PACKET_qCRC]); |
| 10268 | if (result == PACKET_ERROR) |
| 10269 | return -1; |
| 10270 | else if (result == PACKET_OK) |
| 10271 | { |
| 10272 | for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++) |
| 10273 | target_crc = target_crc * 16 + fromhex (*tmp); |
| 10274 | |
| 10275 | return (host_crc == target_crc); |
| 10276 | } |
| 10277 | } |
| 10278 | |
| 10279 | return simple_verify_memory (ops, data, lma, size); |
| 10280 | } |
| 10281 | |
| 10282 | /* compare-sections command |
| 10283 | |
| 10284 | With no arguments, compares each loadable section in the exec bfd |
| 10285 | with the same memory range on the target, and reports mismatches. |
| 10286 | Useful for verifying the image on the target against the exec file. */ |
| 10287 | |
| 10288 | static void |
| 10289 | compare_sections_command (const char *args, int from_tty) |
| 10290 | { |
| 10291 | asection *s; |
| 10292 | gdb_byte *sectdata; |
| 10293 | const char *sectname; |
| 10294 | bfd_size_type size; |
| 10295 | bfd_vma lma; |
| 10296 | int matched = 0; |
| 10297 | int mismatched = 0; |
| 10298 | int res; |
| 10299 | int read_only = 0; |
| 10300 | |
| 10301 | if (!exec_bfd) |
| 10302 | error (_("command cannot be used without an exec file")); |
| 10303 | |
| 10304 | /* Make sure the remote is pointing at the right process. */ |
| 10305 | set_general_process (); |
| 10306 | |
| 10307 | if (args != NULL && strcmp (args, "-r") == 0) |
| 10308 | { |
| 10309 | read_only = 1; |
| 10310 | args = NULL; |
| 10311 | } |
| 10312 | |
| 10313 | for (s = exec_bfd->sections; s; s = s->next) |
| 10314 | { |
| 10315 | if (!(s->flags & SEC_LOAD)) |
| 10316 | continue; /* Skip non-loadable section. */ |
| 10317 | |
| 10318 | if (read_only && (s->flags & SEC_READONLY) == 0) |
| 10319 | continue; /* Skip writeable sections */ |
| 10320 | |
| 10321 | size = bfd_get_section_size (s); |
| 10322 | if (size == 0) |
| 10323 | continue; /* Skip zero-length section. */ |
| 10324 | |
| 10325 | sectname = bfd_get_section_name (exec_bfd, s); |
| 10326 | if (args && strcmp (args, sectname) != 0) |
| 10327 | continue; /* Not the section selected by user. */ |
| 10328 | |
| 10329 | matched = 1; /* Do this section. */ |
| 10330 | lma = s->lma; |
| 10331 | |
| 10332 | gdb::byte_vector sectdata (size); |
| 10333 | bfd_get_section_contents (exec_bfd, s, sectdata.data (), 0, size); |
| 10334 | |
| 10335 | res = target_verify_memory (sectdata.data (), lma, size); |
| 10336 | |
| 10337 | if (res == -1) |
| 10338 | error (_("target memory fault, section %s, range %s -- %s"), sectname, |
| 10339 | paddress (target_gdbarch (), lma), |
| 10340 | paddress (target_gdbarch (), lma + size)); |
| 10341 | |
| 10342 | printf_filtered ("Section %s, range %s -- %s: ", sectname, |
| 10343 | paddress (target_gdbarch (), lma), |
| 10344 | paddress (target_gdbarch (), lma + size)); |
| 10345 | if (res) |
| 10346 | printf_filtered ("matched.\n"); |
| 10347 | else |
| 10348 | { |
| 10349 | printf_filtered ("MIS-MATCHED!\n"); |
| 10350 | mismatched++; |
| 10351 | } |
| 10352 | } |
| 10353 | if (mismatched > 0) |
| 10354 | warning (_("One or more sections of the target image does not match\n\ |
| 10355 | the loaded file\n")); |
| 10356 | if (args && !matched) |
| 10357 | printf_filtered (_("No loaded section named '%s'.\n"), args); |
| 10358 | } |
| 10359 | |
| 10360 | /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET |
| 10361 | into remote target. The number of bytes written to the remote |
| 10362 | target is returned, or -1 for error. */ |
| 10363 | |
| 10364 | static enum target_xfer_status |
| 10365 | remote_write_qxfer (struct target_ops *ops, const char *object_name, |
| 10366 | const char *annex, const gdb_byte *writebuf, |
| 10367 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len, |
| 10368 | struct packet_config *packet) |
| 10369 | { |
| 10370 | int i, buf_len; |
| 10371 | ULONGEST n; |
| 10372 | struct remote_state *rs = get_remote_state (); |
| 10373 | int max_size = get_memory_write_packet_size (); |
| 10374 | |
| 10375 | if (packet->support == PACKET_DISABLE) |
| 10376 | return TARGET_XFER_E_IO; |
| 10377 | |
| 10378 | /* Insert header. */ |
| 10379 | i = snprintf (rs->buf, max_size, |
| 10380 | "qXfer:%s:write:%s:%s:", |
| 10381 | object_name, annex ? annex : "", |
| 10382 | phex_nz (offset, sizeof offset)); |
| 10383 | max_size -= (i + 1); |
| 10384 | |
| 10385 | /* Escape as much data as fits into rs->buf. */ |
| 10386 | buf_len = remote_escape_output |
| 10387 | (writebuf, len, 1, (gdb_byte *) rs->buf + i, &max_size, max_size); |
| 10388 | |
| 10389 | if (putpkt_binary (rs->buf, i + buf_len) < 0 |
| 10390 | || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0 |
| 10391 | || packet_ok (rs->buf, packet) != PACKET_OK) |
| 10392 | return TARGET_XFER_E_IO; |
| 10393 | |
| 10394 | unpack_varlen_hex (rs->buf, &n); |
| 10395 | |
| 10396 | *xfered_len = n; |
| 10397 | return TARGET_XFER_OK; |
| 10398 | } |
| 10399 | |
| 10400 | /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet. |
| 10401 | Data at OFFSET, of up to LEN bytes, is read into READBUF; the |
| 10402 | number of bytes read is returned, or 0 for EOF, or -1 for error. |
| 10403 | The number of bytes read may be less than LEN without indicating an |
| 10404 | EOF. PACKET is checked and updated to indicate whether the remote |
| 10405 | target supports this object. */ |
| 10406 | |
| 10407 | static enum target_xfer_status |
| 10408 | remote_read_qxfer (struct target_ops *ops, const char *object_name, |
| 10409 | const char *annex, |
| 10410 | gdb_byte *readbuf, ULONGEST offset, LONGEST len, |
| 10411 | ULONGEST *xfered_len, |
| 10412 | struct packet_config *packet) |
| 10413 | { |
| 10414 | struct remote_state *rs = get_remote_state (); |
| 10415 | LONGEST i, n, packet_len; |
| 10416 | |
| 10417 | if (packet->support == PACKET_DISABLE) |
| 10418 | return TARGET_XFER_E_IO; |
| 10419 | |
| 10420 | /* Check whether we've cached an end-of-object packet that matches |
| 10421 | this request. */ |
| 10422 | if (rs->finished_object) |
| 10423 | { |
| 10424 | if (strcmp (object_name, rs->finished_object) == 0 |
| 10425 | && strcmp (annex ? annex : "", rs->finished_annex) == 0 |
| 10426 | && offset == rs->finished_offset) |
| 10427 | return TARGET_XFER_EOF; |
| 10428 | |
| 10429 | |
| 10430 | /* Otherwise, we're now reading something different. Discard |
| 10431 | the cache. */ |
| 10432 | xfree (rs->finished_object); |
| 10433 | xfree (rs->finished_annex); |
| 10434 | rs->finished_object = NULL; |
| 10435 | rs->finished_annex = NULL; |
| 10436 | } |
| 10437 | |
| 10438 | /* Request only enough to fit in a single packet. The actual data |
| 10439 | may not, since we don't know how much of it will need to be escaped; |
| 10440 | the target is free to respond with slightly less data. We subtract |
| 10441 | five to account for the response type and the protocol frame. */ |
| 10442 | n = std::min<LONGEST> (get_remote_packet_size () - 5, len); |
| 10443 | snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s", |
| 10444 | object_name, annex ? annex : "", |
| 10445 | phex_nz (offset, sizeof offset), |
| 10446 | phex_nz (n, sizeof n)); |
| 10447 | i = putpkt (rs->buf); |
| 10448 | if (i < 0) |
| 10449 | return TARGET_XFER_E_IO; |
| 10450 | |
| 10451 | rs->buf[0] = '\0'; |
| 10452 | packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0); |
| 10453 | if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK) |
| 10454 | return TARGET_XFER_E_IO; |
| 10455 | |
| 10456 | if (rs->buf[0] != 'l' && rs->buf[0] != 'm') |
| 10457 | error (_("Unknown remote qXfer reply: %s"), rs->buf); |
| 10458 | |
| 10459 | /* 'm' means there is (or at least might be) more data after this |
| 10460 | batch. That does not make sense unless there's at least one byte |
| 10461 | of data in this reply. */ |
| 10462 | if (rs->buf[0] == 'm' && packet_len == 1) |
| 10463 | error (_("Remote qXfer reply contained no data.")); |
| 10464 | |
| 10465 | /* Got some data. */ |
| 10466 | i = remote_unescape_input ((gdb_byte *) rs->buf + 1, |
| 10467 | packet_len - 1, readbuf, n); |
| 10468 | |
| 10469 | /* 'l' is an EOF marker, possibly including a final block of data, |
| 10470 | or possibly empty. If we have the final block of a non-empty |
| 10471 | object, record this fact to bypass a subsequent partial read. */ |
| 10472 | if (rs->buf[0] == 'l' && offset + i > 0) |
| 10473 | { |
| 10474 | rs->finished_object = xstrdup (object_name); |
| 10475 | rs->finished_annex = xstrdup (annex ? annex : ""); |
| 10476 | rs->finished_offset = offset + i; |
| 10477 | } |
| 10478 | |
| 10479 | if (i == 0) |
| 10480 | return TARGET_XFER_EOF; |
| 10481 | else |
| 10482 | { |
| 10483 | *xfered_len = i; |
| 10484 | return TARGET_XFER_OK; |
| 10485 | } |
| 10486 | } |
| 10487 | |
| 10488 | static enum target_xfer_status |
| 10489 | remote_xfer_partial (struct target_ops *ops, enum target_object object, |
| 10490 | const char *annex, gdb_byte *readbuf, |
| 10491 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
| 10492 | ULONGEST *xfered_len) |
| 10493 | { |
| 10494 | struct remote_state *rs; |
| 10495 | int i; |
| 10496 | char *p2; |
| 10497 | char query_type; |
| 10498 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
| 10499 | |
| 10500 | set_remote_traceframe (); |
| 10501 | set_general_thread (inferior_ptid); |
| 10502 | |
| 10503 | rs = get_remote_state (); |
| 10504 | |
| 10505 | /* Handle memory using the standard memory routines. */ |
| 10506 | if (object == TARGET_OBJECT_MEMORY) |
| 10507 | { |
| 10508 | /* If the remote target is connected but not running, we should |
| 10509 | pass this request down to a lower stratum (e.g. the executable |
| 10510 | file). */ |
| 10511 | if (!target_has_execution) |
| 10512 | return TARGET_XFER_EOF; |
| 10513 | |
| 10514 | if (writebuf != NULL) |
| 10515 | return remote_write_bytes (offset, writebuf, len, unit_size, |
| 10516 | xfered_len); |
| 10517 | else |
| 10518 | return remote_read_bytes (ops, offset, readbuf, len, unit_size, |
| 10519 | xfered_len); |
| 10520 | } |
| 10521 | |
| 10522 | /* Handle SPU memory using qxfer packets. */ |
| 10523 | if (object == TARGET_OBJECT_SPU) |
| 10524 | { |
| 10525 | if (readbuf) |
| 10526 | return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len, |
| 10527 | xfered_len, &remote_protocol_packets |
| 10528 | [PACKET_qXfer_spu_read]); |
| 10529 | else |
| 10530 | return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len, |
| 10531 | xfered_len, &remote_protocol_packets |
| 10532 | [PACKET_qXfer_spu_write]); |
| 10533 | } |
| 10534 | |
| 10535 | /* Handle extra signal info using qxfer packets. */ |
| 10536 | if (object == TARGET_OBJECT_SIGNAL_INFO) |
| 10537 | { |
| 10538 | if (readbuf) |
| 10539 | return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len, |
| 10540 | xfered_len, &remote_protocol_packets |
| 10541 | [PACKET_qXfer_siginfo_read]); |
| 10542 | else |
| 10543 | return remote_write_qxfer (ops, "siginfo", annex, |
| 10544 | writebuf, offset, len, xfered_len, |
| 10545 | &remote_protocol_packets |
| 10546 | [PACKET_qXfer_siginfo_write]); |
| 10547 | } |
| 10548 | |
| 10549 | if (object == TARGET_OBJECT_STATIC_TRACE_DATA) |
| 10550 | { |
| 10551 | if (readbuf) |
| 10552 | return remote_read_qxfer (ops, "statictrace", annex, |
| 10553 | readbuf, offset, len, xfered_len, |
| 10554 | &remote_protocol_packets |
| 10555 | [PACKET_qXfer_statictrace_read]); |
| 10556 | else |
| 10557 | return TARGET_XFER_E_IO; |
| 10558 | } |
| 10559 | |
| 10560 | /* Only handle flash writes. */ |
| 10561 | if (writebuf != NULL) |
| 10562 | { |
| 10563 | switch (object) |
| 10564 | { |
| 10565 | case TARGET_OBJECT_FLASH: |
| 10566 | return remote_flash_write (ops, offset, len, xfered_len, |
| 10567 | writebuf); |
| 10568 | |
| 10569 | default: |
| 10570 | return TARGET_XFER_E_IO; |
| 10571 | } |
| 10572 | } |
| 10573 | |
| 10574 | /* Map pre-existing objects onto letters. DO NOT do this for new |
| 10575 | objects!!! Instead specify new query packets. */ |
| 10576 | switch (object) |
| 10577 | { |
| 10578 | case TARGET_OBJECT_AVR: |
| 10579 | query_type = 'R'; |
| 10580 | break; |
| 10581 | |
| 10582 | case TARGET_OBJECT_AUXV: |
| 10583 | gdb_assert (annex == NULL); |
| 10584 | return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len, |
| 10585 | xfered_len, |
| 10586 | &remote_protocol_packets[PACKET_qXfer_auxv]); |
| 10587 | |
| 10588 | case TARGET_OBJECT_AVAILABLE_FEATURES: |
| 10589 | return remote_read_qxfer |
| 10590 | (ops, "features", annex, readbuf, offset, len, xfered_len, |
| 10591 | &remote_protocol_packets[PACKET_qXfer_features]); |
| 10592 | |
| 10593 | case TARGET_OBJECT_LIBRARIES: |
| 10594 | return remote_read_qxfer |
| 10595 | (ops, "libraries", annex, readbuf, offset, len, xfered_len, |
| 10596 | &remote_protocol_packets[PACKET_qXfer_libraries]); |
| 10597 | |
| 10598 | case TARGET_OBJECT_LIBRARIES_SVR4: |
| 10599 | return remote_read_qxfer |
| 10600 | (ops, "libraries-svr4", annex, readbuf, offset, len, xfered_len, |
| 10601 | &remote_protocol_packets[PACKET_qXfer_libraries_svr4]); |
| 10602 | |
| 10603 | case TARGET_OBJECT_MEMORY_MAP: |
| 10604 | gdb_assert (annex == NULL); |
| 10605 | return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len, |
| 10606 | xfered_len, |
| 10607 | &remote_protocol_packets[PACKET_qXfer_memory_map]); |
| 10608 | |
| 10609 | case TARGET_OBJECT_OSDATA: |
| 10610 | /* Should only get here if we're connected. */ |
| 10611 | gdb_assert (rs->remote_desc); |
| 10612 | return remote_read_qxfer |
| 10613 | (ops, "osdata", annex, readbuf, offset, len, xfered_len, |
| 10614 | &remote_protocol_packets[PACKET_qXfer_osdata]); |
| 10615 | |
| 10616 | case TARGET_OBJECT_THREADS: |
| 10617 | gdb_assert (annex == NULL); |
| 10618 | return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len, |
| 10619 | xfered_len, |
| 10620 | &remote_protocol_packets[PACKET_qXfer_threads]); |
| 10621 | |
| 10622 | case TARGET_OBJECT_TRACEFRAME_INFO: |
| 10623 | gdb_assert (annex == NULL); |
| 10624 | return remote_read_qxfer |
| 10625 | (ops, "traceframe-info", annex, readbuf, offset, len, xfered_len, |
| 10626 | &remote_protocol_packets[PACKET_qXfer_traceframe_info]); |
| 10627 | |
| 10628 | case TARGET_OBJECT_FDPIC: |
| 10629 | return remote_read_qxfer (ops, "fdpic", annex, readbuf, offset, len, |
| 10630 | xfered_len, |
| 10631 | &remote_protocol_packets[PACKET_qXfer_fdpic]); |
| 10632 | |
| 10633 | case TARGET_OBJECT_OPENVMS_UIB: |
| 10634 | return remote_read_qxfer (ops, "uib", annex, readbuf, offset, len, |
| 10635 | xfered_len, |
| 10636 | &remote_protocol_packets[PACKET_qXfer_uib]); |
| 10637 | |
| 10638 | case TARGET_OBJECT_BTRACE: |
| 10639 | return remote_read_qxfer (ops, "btrace", annex, readbuf, offset, len, |
| 10640 | xfered_len, |
| 10641 | &remote_protocol_packets[PACKET_qXfer_btrace]); |
| 10642 | |
| 10643 | case TARGET_OBJECT_BTRACE_CONF: |
| 10644 | return remote_read_qxfer (ops, "btrace-conf", annex, readbuf, offset, |
| 10645 | len, xfered_len, |
| 10646 | &remote_protocol_packets[PACKET_qXfer_btrace_conf]); |
| 10647 | |
| 10648 | case TARGET_OBJECT_EXEC_FILE: |
| 10649 | return remote_read_qxfer (ops, "exec-file", annex, readbuf, offset, |
| 10650 | len, xfered_len, |
| 10651 | &remote_protocol_packets[PACKET_qXfer_exec_file]); |
| 10652 | |
| 10653 | default: |
| 10654 | return TARGET_XFER_E_IO; |
| 10655 | } |
| 10656 | |
| 10657 | /* Minimum outbuf size is get_remote_packet_size (). If LEN is not |
| 10658 | large enough let the caller deal with it. */ |
| 10659 | if (len < get_remote_packet_size ()) |
| 10660 | return TARGET_XFER_E_IO; |
| 10661 | len = get_remote_packet_size (); |
| 10662 | |
| 10663 | /* Except for querying the minimum buffer size, target must be open. */ |
| 10664 | if (!rs->remote_desc) |
| 10665 | error (_("remote query is only available after target open")); |
| 10666 | |
| 10667 | gdb_assert (annex != NULL); |
| 10668 | gdb_assert (readbuf != NULL); |
| 10669 | |
| 10670 | p2 = rs->buf; |
| 10671 | *p2++ = 'q'; |
| 10672 | *p2++ = query_type; |
| 10673 | |
| 10674 | /* We used one buffer char for the remote protocol q command and |
| 10675 | another for the query type. As the remote protocol encapsulation |
| 10676 | uses 4 chars plus one extra in case we are debugging |
| 10677 | (remote_debug), we have PBUFZIZ - 7 left to pack the query |
| 10678 | string. */ |
| 10679 | i = 0; |
| 10680 | while (annex[i] && (i < (get_remote_packet_size () - 8))) |
| 10681 | { |
| 10682 | /* Bad caller may have sent forbidden characters. */ |
| 10683 | gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#'); |
| 10684 | *p2++ = annex[i]; |
| 10685 | i++; |
| 10686 | } |
| 10687 | *p2 = '\0'; |
| 10688 | gdb_assert (annex[i] == '\0'); |
| 10689 | |
| 10690 | i = putpkt (rs->buf); |
| 10691 | if (i < 0) |
| 10692 | return TARGET_XFER_E_IO; |
| 10693 | |
| 10694 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 10695 | strcpy ((char *) readbuf, rs->buf); |
| 10696 | |
| 10697 | *xfered_len = strlen ((char *) readbuf); |
| 10698 | return TARGET_XFER_OK; |
| 10699 | } |
| 10700 | |
| 10701 | /* Implementation of to_get_memory_xfer_limit. */ |
| 10702 | |
| 10703 | static ULONGEST |
| 10704 | remote_get_memory_xfer_limit (struct target_ops *ops) |
| 10705 | { |
| 10706 | return get_memory_write_packet_size (); |
| 10707 | } |
| 10708 | |
| 10709 | static int |
| 10710 | remote_search_memory (struct target_ops* ops, |
| 10711 | CORE_ADDR start_addr, ULONGEST search_space_len, |
| 10712 | const gdb_byte *pattern, ULONGEST pattern_len, |
| 10713 | CORE_ADDR *found_addrp) |
| 10714 | { |
| 10715 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
| 10716 | struct remote_state *rs = get_remote_state (); |
| 10717 | int max_size = get_memory_write_packet_size (); |
| 10718 | struct packet_config *packet = |
| 10719 | &remote_protocol_packets[PACKET_qSearch_memory]; |
| 10720 | /* Number of packet bytes used to encode the pattern; |
| 10721 | this could be more than PATTERN_LEN due to escape characters. */ |
| 10722 | int escaped_pattern_len; |
| 10723 | /* Amount of pattern that was encodable in the packet. */ |
| 10724 | int used_pattern_len; |
| 10725 | int i; |
| 10726 | int found; |
| 10727 | ULONGEST found_addr; |
| 10728 | |
| 10729 | /* Don't go to the target if we don't have to. |
| 10730 | This is done before checking packet->support to avoid the possibility that |
| 10731 | a success for this edge case means the facility works in general. */ |
| 10732 | if (pattern_len > search_space_len) |
| 10733 | return 0; |
| 10734 | if (pattern_len == 0) |
| 10735 | { |
| 10736 | *found_addrp = start_addr; |
| 10737 | return 1; |
| 10738 | } |
| 10739 | |
| 10740 | /* If we already know the packet isn't supported, fall back to the simple |
| 10741 | way of searching memory. */ |
| 10742 | |
| 10743 | if (packet_config_support (packet) == PACKET_DISABLE) |
| 10744 | { |
| 10745 | /* Target doesn't provided special support, fall back and use the |
| 10746 | standard support (copy memory and do the search here). */ |
| 10747 | return simple_search_memory (ops, start_addr, search_space_len, |
| 10748 | pattern, pattern_len, found_addrp); |
| 10749 | } |
| 10750 | |
| 10751 | /* Make sure the remote is pointing at the right process. */ |
| 10752 | set_general_process (); |
| 10753 | |
| 10754 | /* Insert header. */ |
| 10755 | i = snprintf (rs->buf, max_size, |
| 10756 | "qSearch:memory:%s;%s;", |
| 10757 | phex_nz (start_addr, addr_size), |
| 10758 | phex_nz (search_space_len, sizeof (search_space_len))); |
| 10759 | max_size -= (i + 1); |
| 10760 | |
| 10761 | /* Escape as much data as fits into rs->buf. */ |
| 10762 | escaped_pattern_len = |
| 10763 | remote_escape_output (pattern, pattern_len, 1, (gdb_byte *) rs->buf + i, |
| 10764 | &used_pattern_len, max_size); |
| 10765 | |
| 10766 | /* Bail if the pattern is too large. */ |
| 10767 | if (used_pattern_len != pattern_len) |
| 10768 | error (_("Pattern is too large to transmit to remote target.")); |
| 10769 | |
| 10770 | if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0 |
| 10771 | || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0 |
| 10772 | || packet_ok (rs->buf, packet) != PACKET_OK) |
| 10773 | { |
| 10774 | /* The request may not have worked because the command is not |
| 10775 | supported. If so, fall back to the simple way. */ |
| 10776 | if (packet->support == PACKET_DISABLE) |
| 10777 | { |
| 10778 | return simple_search_memory (ops, start_addr, search_space_len, |
| 10779 | pattern, pattern_len, found_addrp); |
| 10780 | } |
| 10781 | return -1; |
| 10782 | } |
| 10783 | |
| 10784 | if (rs->buf[0] == '0') |
| 10785 | found = 0; |
| 10786 | else if (rs->buf[0] == '1') |
| 10787 | { |
| 10788 | found = 1; |
| 10789 | if (rs->buf[1] != ',') |
| 10790 | error (_("Unknown qSearch:memory reply: %s"), rs->buf); |
| 10791 | unpack_varlen_hex (rs->buf + 2, &found_addr); |
| 10792 | *found_addrp = found_addr; |
| 10793 | } |
| 10794 | else |
| 10795 | error (_("Unknown qSearch:memory reply: %s"), rs->buf); |
| 10796 | |
| 10797 | return found; |
| 10798 | } |
| 10799 | |
| 10800 | static void |
| 10801 | remote_rcmd (struct target_ops *self, const char *command, |
| 10802 | struct ui_file *outbuf) |
| 10803 | { |
| 10804 | struct remote_state *rs = get_remote_state (); |
| 10805 | char *p = rs->buf; |
| 10806 | |
| 10807 | if (!rs->remote_desc) |
| 10808 | error (_("remote rcmd is only available after target open")); |
| 10809 | |
| 10810 | /* Send a NULL command across as an empty command. */ |
| 10811 | if (command == NULL) |
| 10812 | command = ""; |
| 10813 | |
| 10814 | /* The query prefix. */ |
| 10815 | strcpy (rs->buf, "qRcmd,"); |
| 10816 | p = strchr (rs->buf, '\0'); |
| 10817 | |
| 10818 | if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/) |
| 10819 | > get_remote_packet_size ()) |
| 10820 | error (_("\"monitor\" command ``%s'' is too long."), command); |
| 10821 | |
| 10822 | /* Encode the actual command. */ |
| 10823 | bin2hex ((const gdb_byte *) command, p, strlen (command)); |
| 10824 | |
| 10825 | if (putpkt (rs->buf) < 0) |
| 10826 | error (_("Communication problem with target.")); |
| 10827 | |
| 10828 | /* get/display the response */ |
| 10829 | while (1) |
| 10830 | { |
| 10831 | char *buf; |
| 10832 | |
| 10833 | /* XXX - see also remote_get_noisy_reply(). */ |
| 10834 | QUIT; /* Allow user to bail out with ^C. */ |
| 10835 | rs->buf[0] = '\0'; |
| 10836 | if (getpkt_sane (&rs->buf, &rs->buf_size, 0) == -1) |
| 10837 | { |
| 10838 | /* Timeout. Continue to (try to) read responses. |
| 10839 | This is better than stopping with an error, assuming the stub |
| 10840 | is still executing the (long) monitor command. |
| 10841 | If needed, the user can interrupt gdb using C-c, obtaining |
| 10842 | an effect similar to stop on timeout. */ |
| 10843 | continue; |
| 10844 | } |
| 10845 | buf = rs->buf; |
| 10846 | if (buf[0] == '\0') |
| 10847 | error (_("Target does not support this command.")); |
| 10848 | if (buf[0] == 'O' && buf[1] != 'K') |
| 10849 | { |
| 10850 | remote_console_output (buf + 1); /* 'O' message from stub. */ |
| 10851 | continue; |
| 10852 | } |
| 10853 | if (strcmp (buf, "OK") == 0) |
| 10854 | break; |
| 10855 | if (strlen (buf) == 3 && buf[0] == 'E' |
| 10856 | && isdigit (buf[1]) && isdigit (buf[2])) |
| 10857 | { |
| 10858 | error (_("Protocol error with Rcmd")); |
| 10859 | } |
| 10860 | for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2) |
| 10861 | { |
| 10862 | char c = (fromhex (p[0]) << 4) + fromhex (p[1]); |
| 10863 | |
| 10864 | fputc_unfiltered (c, outbuf); |
| 10865 | } |
| 10866 | break; |
| 10867 | } |
| 10868 | } |
| 10869 | |
| 10870 | static std::vector<mem_region> |
| 10871 | remote_memory_map (struct target_ops *ops) |
| 10872 | { |
| 10873 | std::vector<mem_region> result; |
| 10874 | gdb::unique_xmalloc_ptr<char> text |
| 10875 | = target_read_stralloc (¤t_target, TARGET_OBJECT_MEMORY_MAP, NULL); |
| 10876 | |
| 10877 | if (text) |
| 10878 | result = parse_memory_map (text.get ()); |
| 10879 | |
| 10880 | return result; |
| 10881 | } |
| 10882 | |
| 10883 | static void |
| 10884 | packet_command (const char *args, int from_tty) |
| 10885 | { |
| 10886 | struct remote_state *rs = get_remote_state (); |
| 10887 | |
| 10888 | if (!rs->remote_desc) |
| 10889 | error (_("command can only be used with remote target")); |
| 10890 | |
| 10891 | if (!args) |
| 10892 | error (_("remote-packet command requires packet text as argument")); |
| 10893 | |
| 10894 | puts_filtered ("sending: "); |
| 10895 | print_packet (args); |
| 10896 | puts_filtered ("\n"); |
| 10897 | putpkt (args); |
| 10898 | |
| 10899 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 10900 | puts_filtered ("received: "); |
| 10901 | print_packet (rs->buf); |
| 10902 | puts_filtered ("\n"); |
| 10903 | } |
| 10904 | |
| 10905 | #if 0 |
| 10906 | /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */ |
| 10907 | |
| 10908 | static void display_thread_info (struct gdb_ext_thread_info *info); |
| 10909 | |
| 10910 | static void threadset_test_cmd (char *cmd, int tty); |
| 10911 | |
| 10912 | static void threadalive_test (char *cmd, int tty); |
| 10913 | |
| 10914 | static void threadlist_test_cmd (char *cmd, int tty); |
| 10915 | |
| 10916 | int get_and_display_threadinfo (threadref *ref); |
| 10917 | |
| 10918 | static void threadinfo_test_cmd (char *cmd, int tty); |
| 10919 | |
| 10920 | static int thread_display_step (threadref *ref, void *context); |
| 10921 | |
| 10922 | static void threadlist_update_test_cmd (char *cmd, int tty); |
| 10923 | |
| 10924 | static void init_remote_threadtests (void); |
| 10925 | |
| 10926 | #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */ |
| 10927 | |
| 10928 | static void |
| 10929 | threadset_test_cmd (char *cmd, int tty) |
| 10930 | { |
| 10931 | int sample_thread = SAMPLE_THREAD; |
| 10932 | |
| 10933 | printf_filtered (_("Remote threadset test\n")); |
| 10934 | set_general_thread (sample_thread); |
| 10935 | } |
| 10936 | |
| 10937 | |
| 10938 | static void |
| 10939 | threadalive_test (char *cmd, int tty) |
| 10940 | { |
| 10941 | int sample_thread = SAMPLE_THREAD; |
| 10942 | int pid = ptid_get_pid (inferior_ptid); |
| 10943 | ptid_t ptid = ptid_build (pid, sample_thread, 0); |
| 10944 | |
| 10945 | if (remote_thread_alive (ptid)) |
| 10946 | printf_filtered ("PASS: Thread alive test\n"); |
| 10947 | else |
| 10948 | printf_filtered ("FAIL: Thread alive test\n"); |
| 10949 | } |
| 10950 | |
| 10951 | void output_threadid (char *title, threadref *ref); |
| 10952 | |
| 10953 | void |
| 10954 | output_threadid (char *title, threadref *ref) |
| 10955 | { |
| 10956 | char hexid[20]; |
| 10957 | |
| 10958 | pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */ |
| 10959 | hexid[16] = 0; |
| 10960 | printf_filtered ("%s %s\n", title, (&hexid[0])); |
| 10961 | } |
| 10962 | |
| 10963 | static void |
| 10964 | threadlist_test_cmd (char *cmd, int tty) |
| 10965 | { |
| 10966 | int startflag = 1; |
| 10967 | threadref nextthread; |
| 10968 | int done, result_count; |
| 10969 | threadref threadlist[3]; |
| 10970 | |
| 10971 | printf_filtered ("Remote Threadlist test\n"); |
| 10972 | if (!remote_get_threadlist (startflag, &nextthread, 3, &done, |
| 10973 | &result_count, &threadlist[0])) |
| 10974 | printf_filtered ("FAIL: threadlist test\n"); |
| 10975 | else |
| 10976 | { |
| 10977 | threadref *scan = threadlist; |
| 10978 | threadref *limit = scan + result_count; |
| 10979 | |
| 10980 | while (scan < limit) |
| 10981 | output_threadid (" thread ", scan++); |
| 10982 | } |
| 10983 | } |
| 10984 | |
| 10985 | void |
| 10986 | display_thread_info (struct gdb_ext_thread_info *info) |
| 10987 | { |
| 10988 | output_threadid ("Threadid: ", &info->threadid); |
| 10989 | printf_filtered ("Name: %s\n ", info->shortname); |
| 10990 | printf_filtered ("State: %s\n", info->display); |
| 10991 | printf_filtered ("other: %s\n\n", info->more_display); |
| 10992 | } |
| 10993 | |
| 10994 | int |
| 10995 | get_and_display_threadinfo (threadref *ref) |
| 10996 | { |
| 10997 | int result; |
| 10998 | int set; |
| 10999 | struct gdb_ext_thread_info threadinfo; |
| 11000 | |
| 11001 | set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME |
| 11002 | | TAG_MOREDISPLAY | TAG_DISPLAY; |
| 11003 | if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo))) |
| 11004 | display_thread_info (&threadinfo); |
| 11005 | return result; |
| 11006 | } |
| 11007 | |
| 11008 | static void |
| 11009 | threadinfo_test_cmd (char *cmd, int tty) |
| 11010 | { |
| 11011 | int athread = SAMPLE_THREAD; |
| 11012 | threadref thread; |
| 11013 | int set; |
| 11014 | |
| 11015 | int_to_threadref (&thread, athread); |
| 11016 | printf_filtered ("Remote Threadinfo test\n"); |
| 11017 | if (!get_and_display_threadinfo (&thread)) |
| 11018 | printf_filtered ("FAIL cannot get thread info\n"); |
| 11019 | } |
| 11020 | |
| 11021 | static int |
| 11022 | thread_display_step (threadref *ref, void *context) |
| 11023 | { |
| 11024 | /* output_threadid(" threadstep ",ref); *//* simple test */ |
| 11025 | return get_and_display_threadinfo (ref); |
| 11026 | } |
| 11027 | |
| 11028 | static void |
| 11029 | threadlist_update_test_cmd (char *cmd, int tty) |
| 11030 | { |
| 11031 | printf_filtered ("Remote Threadlist update test\n"); |
| 11032 | remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS); |
| 11033 | } |
| 11034 | |
| 11035 | static void |
| 11036 | init_remote_threadtests (void) |
| 11037 | { |
| 11038 | add_com ("tlist", class_obscure, threadlist_test_cmd, |
| 11039 | _("Fetch and print the remote list of " |
| 11040 | "thread identifiers, one pkt only")); |
| 11041 | add_com ("tinfo", class_obscure, threadinfo_test_cmd, |
| 11042 | _("Fetch and display info about one thread")); |
| 11043 | add_com ("tset", class_obscure, threadset_test_cmd, |
| 11044 | _("Test setting to a different thread")); |
| 11045 | add_com ("tupd", class_obscure, threadlist_update_test_cmd, |
| 11046 | _("Iterate through updating all remote thread info")); |
| 11047 | add_com ("talive", class_obscure, threadalive_test, |
| 11048 | _(" Remote thread alive test ")); |
| 11049 | } |
| 11050 | |
| 11051 | #endif /* 0 */ |
| 11052 | |
| 11053 | /* Convert a thread ID to a string. Returns the string in a static |
| 11054 | buffer. */ |
| 11055 | |
| 11056 | static const char * |
| 11057 | remote_pid_to_str (struct target_ops *ops, ptid_t ptid) |
| 11058 | { |
| 11059 | static char buf[64]; |
| 11060 | struct remote_state *rs = get_remote_state (); |
| 11061 | |
| 11062 | if (ptid_equal (ptid, null_ptid)) |
| 11063 | return normal_pid_to_str (ptid); |
| 11064 | else if (ptid_is_pid (ptid)) |
| 11065 | { |
| 11066 | /* Printing an inferior target id. */ |
| 11067 | |
| 11068 | /* When multi-process extensions are off, there's no way in the |
| 11069 | remote protocol to know the remote process id, if there's any |
| 11070 | at all. There's one exception --- when we're connected with |
| 11071 | target extended-remote, and we manually attached to a process |
| 11072 | with "attach PID". We don't record anywhere a flag that |
| 11073 | allows us to distinguish that case from the case of |
| 11074 | connecting with extended-remote and the stub already being |
| 11075 | attached to a process, and reporting yes to qAttached, hence |
| 11076 | no smart special casing here. */ |
| 11077 | if (!remote_multi_process_p (rs)) |
| 11078 | { |
| 11079 | xsnprintf (buf, sizeof buf, "Remote target"); |
| 11080 | return buf; |
| 11081 | } |
| 11082 | |
| 11083 | return normal_pid_to_str (ptid); |
| 11084 | } |
| 11085 | else |
| 11086 | { |
| 11087 | if (ptid_equal (magic_null_ptid, ptid)) |
| 11088 | xsnprintf (buf, sizeof buf, "Thread <main>"); |
| 11089 | else if (remote_multi_process_p (rs)) |
| 11090 | if (ptid_get_lwp (ptid) == 0) |
| 11091 | return normal_pid_to_str (ptid); |
| 11092 | else |
| 11093 | xsnprintf (buf, sizeof buf, "Thread %d.%ld", |
| 11094 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
| 11095 | else |
| 11096 | xsnprintf (buf, sizeof buf, "Thread %ld", |
| 11097 | ptid_get_lwp (ptid)); |
| 11098 | return buf; |
| 11099 | } |
| 11100 | } |
| 11101 | |
| 11102 | /* Get the address of the thread local variable in OBJFILE which is |
| 11103 | stored at OFFSET within the thread local storage for thread PTID. */ |
| 11104 | |
| 11105 | static CORE_ADDR |
| 11106 | remote_get_thread_local_address (struct target_ops *ops, |
| 11107 | ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset) |
| 11108 | { |
| 11109 | if (packet_support (PACKET_qGetTLSAddr) != PACKET_DISABLE) |
| 11110 | { |
| 11111 | struct remote_state *rs = get_remote_state (); |
| 11112 | char *p = rs->buf; |
| 11113 | char *endp = rs->buf + get_remote_packet_size (); |
| 11114 | enum packet_result result; |
| 11115 | |
| 11116 | strcpy (p, "qGetTLSAddr:"); |
| 11117 | p += strlen (p); |
| 11118 | p = write_ptid (p, endp, ptid); |
| 11119 | *p++ = ','; |
| 11120 | p += hexnumstr (p, offset); |
| 11121 | *p++ = ','; |
| 11122 | p += hexnumstr (p, lm); |
| 11123 | *p++ = '\0'; |
| 11124 | |
| 11125 | putpkt (rs->buf); |
| 11126 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 11127 | result = packet_ok (rs->buf, |
| 11128 | &remote_protocol_packets[PACKET_qGetTLSAddr]); |
| 11129 | if (result == PACKET_OK) |
| 11130 | { |
| 11131 | ULONGEST result; |
| 11132 | |
| 11133 | unpack_varlen_hex (rs->buf, &result); |
| 11134 | return result; |
| 11135 | } |
| 11136 | else if (result == PACKET_UNKNOWN) |
| 11137 | throw_error (TLS_GENERIC_ERROR, |
| 11138 | _("Remote target doesn't support qGetTLSAddr packet")); |
| 11139 | else |
| 11140 | throw_error (TLS_GENERIC_ERROR, |
| 11141 | _("Remote target failed to process qGetTLSAddr request")); |
| 11142 | } |
| 11143 | else |
| 11144 | throw_error (TLS_GENERIC_ERROR, |
| 11145 | _("TLS not supported or disabled on this target")); |
| 11146 | /* Not reached. */ |
| 11147 | return 0; |
| 11148 | } |
| 11149 | |
| 11150 | /* Provide thread local base, i.e. Thread Information Block address. |
| 11151 | Returns 1 if ptid is found and thread_local_base is non zero. */ |
| 11152 | |
| 11153 | static int |
| 11154 | remote_get_tib_address (struct target_ops *self, ptid_t ptid, CORE_ADDR *addr) |
| 11155 | { |
| 11156 | if (packet_support (PACKET_qGetTIBAddr) != PACKET_DISABLE) |
| 11157 | { |
| 11158 | struct remote_state *rs = get_remote_state (); |
| 11159 | char *p = rs->buf; |
| 11160 | char *endp = rs->buf + get_remote_packet_size (); |
| 11161 | enum packet_result result; |
| 11162 | |
| 11163 | strcpy (p, "qGetTIBAddr:"); |
| 11164 | p += strlen (p); |
| 11165 | p = write_ptid (p, endp, ptid); |
| 11166 | *p++ = '\0'; |
| 11167 | |
| 11168 | putpkt (rs->buf); |
| 11169 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 11170 | result = packet_ok (rs->buf, |
| 11171 | &remote_protocol_packets[PACKET_qGetTIBAddr]); |
| 11172 | if (result == PACKET_OK) |
| 11173 | { |
| 11174 | ULONGEST result; |
| 11175 | |
| 11176 | unpack_varlen_hex (rs->buf, &result); |
| 11177 | if (addr) |
| 11178 | *addr = (CORE_ADDR) result; |
| 11179 | return 1; |
| 11180 | } |
| 11181 | else if (result == PACKET_UNKNOWN) |
| 11182 | error (_("Remote target doesn't support qGetTIBAddr packet")); |
| 11183 | else |
| 11184 | error (_("Remote target failed to process qGetTIBAddr request")); |
| 11185 | } |
| 11186 | else |
| 11187 | error (_("qGetTIBAddr not supported or disabled on this target")); |
| 11188 | /* Not reached. */ |
| 11189 | return 0; |
| 11190 | } |
| 11191 | |
| 11192 | /* Support for inferring a target description based on the current |
| 11193 | architecture and the size of a 'g' packet. While the 'g' packet |
| 11194 | can have any size (since optional registers can be left off the |
| 11195 | end), some sizes are easily recognizable given knowledge of the |
| 11196 | approximate architecture. */ |
| 11197 | |
| 11198 | struct remote_g_packet_guess |
| 11199 | { |
| 11200 | int bytes; |
| 11201 | const struct target_desc *tdesc; |
| 11202 | }; |
| 11203 | typedef struct remote_g_packet_guess remote_g_packet_guess_s; |
| 11204 | DEF_VEC_O(remote_g_packet_guess_s); |
| 11205 | |
| 11206 | struct remote_g_packet_data |
| 11207 | { |
| 11208 | VEC(remote_g_packet_guess_s) *guesses; |
| 11209 | }; |
| 11210 | |
| 11211 | static struct gdbarch_data *remote_g_packet_data_handle; |
| 11212 | |
| 11213 | static void * |
| 11214 | remote_g_packet_data_init (struct obstack *obstack) |
| 11215 | { |
| 11216 | return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data); |
| 11217 | } |
| 11218 | |
| 11219 | void |
| 11220 | register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes, |
| 11221 | const struct target_desc *tdesc) |
| 11222 | { |
| 11223 | struct remote_g_packet_data *data |
| 11224 | = ((struct remote_g_packet_data *) |
| 11225 | gdbarch_data (gdbarch, remote_g_packet_data_handle)); |
| 11226 | struct remote_g_packet_guess new_guess, *guess; |
| 11227 | int ix; |
| 11228 | |
| 11229 | gdb_assert (tdesc != NULL); |
| 11230 | |
| 11231 | for (ix = 0; |
| 11232 | VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess); |
| 11233 | ix++) |
| 11234 | if (guess->bytes == bytes) |
| 11235 | internal_error (__FILE__, __LINE__, |
| 11236 | _("Duplicate g packet description added for size %d"), |
| 11237 | bytes); |
| 11238 | |
| 11239 | new_guess.bytes = bytes; |
| 11240 | new_guess.tdesc = tdesc; |
| 11241 | VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess); |
| 11242 | } |
| 11243 | |
| 11244 | /* Return 1 if remote_read_description would do anything on this target |
| 11245 | and architecture, 0 otherwise. */ |
| 11246 | |
| 11247 | static int |
| 11248 | remote_read_description_p (struct target_ops *target) |
| 11249 | { |
| 11250 | struct remote_g_packet_data *data |
| 11251 | = ((struct remote_g_packet_data *) |
| 11252 | gdbarch_data (target_gdbarch (), remote_g_packet_data_handle)); |
| 11253 | |
| 11254 | if (!VEC_empty (remote_g_packet_guess_s, data->guesses)) |
| 11255 | return 1; |
| 11256 | |
| 11257 | return 0; |
| 11258 | } |
| 11259 | |
| 11260 | static const struct target_desc * |
| 11261 | remote_read_description (struct target_ops *target) |
| 11262 | { |
| 11263 | struct remote_g_packet_data *data |
| 11264 | = ((struct remote_g_packet_data *) |
| 11265 | gdbarch_data (target_gdbarch (), remote_g_packet_data_handle)); |
| 11266 | |
| 11267 | /* Do not try this during initial connection, when we do not know |
| 11268 | whether there is a running but stopped thread. */ |
| 11269 | if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid)) |
| 11270 | return target->beneath->to_read_description (target->beneath); |
| 11271 | |
| 11272 | if (!VEC_empty (remote_g_packet_guess_s, data->guesses)) |
| 11273 | { |
| 11274 | struct remote_g_packet_guess *guess; |
| 11275 | int ix; |
| 11276 | int bytes = send_g_packet (); |
| 11277 | |
| 11278 | for (ix = 0; |
| 11279 | VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess); |
| 11280 | ix++) |
| 11281 | if (guess->bytes == bytes) |
| 11282 | return guess->tdesc; |
| 11283 | |
| 11284 | /* We discard the g packet. A minor optimization would be to |
| 11285 | hold on to it, and fill the register cache once we have selected |
| 11286 | an architecture, but it's too tricky to do safely. */ |
| 11287 | } |
| 11288 | |
| 11289 | return target->beneath->to_read_description (target->beneath); |
| 11290 | } |
| 11291 | |
| 11292 | /* Remote file transfer support. This is host-initiated I/O, not |
| 11293 | target-initiated; for target-initiated, see remote-fileio.c. */ |
| 11294 | |
| 11295 | /* If *LEFT is at least the length of STRING, copy STRING to |
| 11296 | *BUFFER, update *BUFFER to point to the new end of the buffer, and |
| 11297 | decrease *LEFT. Otherwise raise an error. */ |
| 11298 | |
| 11299 | static void |
| 11300 | remote_buffer_add_string (char **buffer, int *left, const char *string) |
| 11301 | { |
| 11302 | int len = strlen (string); |
| 11303 | |
| 11304 | if (len > *left) |
| 11305 | error (_("Packet too long for target.")); |
| 11306 | |
| 11307 | memcpy (*buffer, string, len); |
| 11308 | *buffer += len; |
| 11309 | *left -= len; |
| 11310 | |
| 11311 | /* NUL-terminate the buffer as a convenience, if there is |
| 11312 | room. */ |
| 11313 | if (*left) |
| 11314 | **buffer = '\0'; |
| 11315 | } |
| 11316 | |
| 11317 | /* If *LEFT is large enough, hex encode LEN bytes from BYTES into |
| 11318 | *BUFFER, update *BUFFER to point to the new end of the buffer, and |
| 11319 | decrease *LEFT. Otherwise raise an error. */ |
| 11320 | |
| 11321 | static void |
| 11322 | remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes, |
| 11323 | int len) |
| 11324 | { |
| 11325 | if (2 * len > *left) |
| 11326 | error (_("Packet too long for target.")); |
| 11327 | |
| 11328 | bin2hex (bytes, *buffer, len); |
| 11329 | *buffer += 2 * len; |
| 11330 | *left -= 2 * len; |
| 11331 | |
| 11332 | /* NUL-terminate the buffer as a convenience, if there is |
| 11333 | room. */ |
| 11334 | if (*left) |
| 11335 | **buffer = '\0'; |
| 11336 | } |
| 11337 | |
| 11338 | /* If *LEFT is large enough, convert VALUE to hex and add it to |
| 11339 | *BUFFER, update *BUFFER to point to the new end of the buffer, and |
| 11340 | decrease *LEFT. Otherwise raise an error. */ |
| 11341 | |
| 11342 | static void |
| 11343 | remote_buffer_add_int (char **buffer, int *left, ULONGEST value) |
| 11344 | { |
| 11345 | int len = hexnumlen (value); |
| 11346 | |
| 11347 | if (len > *left) |
| 11348 | error (_("Packet too long for target.")); |
| 11349 | |
| 11350 | hexnumstr (*buffer, value); |
| 11351 | *buffer += len; |
| 11352 | *left -= len; |
| 11353 | |
| 11354 | /* NUL-terminate the buffer as a convenience, if there is |
| 11355 | room. */ |
| 11356 | if (*left) |
| 11357 | **buffer = '\0'; |
| 11358 | } |
| 11359 | |
| 11360 | /* Parse an I/O result packet from BUFFER. Set RETCODE to the return |
| 11361 | value, *REMOTE_ERRNO to the remote error number or zero if none |
| 11362 | was included, and *ATTACHMENT to point to the start of the annex |
| 11363 | if any. The length of the packet isn't needed here; there may |
| 11364 | be NUL bytes in BUFFER, but they will be after *ATTACHMENT. |
| 11365 | |
| 11366 | Return 0 if the packet could be parsed, -1 if it could not. If |
| 11367 | -1 is returned, the other variables may not be initialized. */ |
| 11368 | |
| 11369 | static int |
| 11370 | remote_hostio_parse_result (char *buffer, int *retcode, |
| 11371 | int *remote_errno, char **attachment) |
| 11372 | { |
| 11373 | char *p, *p2; |
| 11374 | |
| 11375 | *remote_errno = 0; |
| 11376 | *attachment = NULL; |
| 11377 | |
| 11378 | if (buffer[0] != 'F') |
| 11379 | return -1; |
| 11380 | |
| 11381 | errno = 0; |
| 11382 | *retcode = strtol (&buffer[1], &p, 16); |
| 11383 | if (errno != 0 || p == &buffer[1]) |
| 11384 | return -1; |
| 11385 | |
| 11386 | /* Check for ",errno". */ |
| 11387 | if (*p == ',') |
| 11388 | { |
| 11389 | errno = 0; |
| 11390 | *remote_errno = strtol (p + 1, &p2, 16); |
| 11391 | if (errno != 0 || p + 1 == p2) |
| 11392 | return -1; |
| 11393 | p = p2; |
| 11394 | } |
| 11395 | |
| 11396 | /* Check for ";attachment". If there is no attachment, the |
| 11397 | packet should end here. */ |
| 11398 | if (*p == ';') |
| 11399 | { |
| 11400 | *attachment = p + 1; |
| 11401 | return 0; |
| 11402 | } |
| 11403 | else if (*p == '\0') |
| 11404 | return 0; |
| 11405 | else |
| 11406 | return -1; |
| 11407 | } |
| 11408 | |
| 11409 | /* Send a prepared I/O packet to the target and read its response. |
| 11410 | The prepared packet is in the global RS->BUF before this function |
| 11411 | is called, and the answer is there when we return. |
| 11412 | |
| 11413 | COMMAND_BYTES is the length of the request to send, which may include |
| 11414 | binary data. WHICH_PACKET is the packet configuration to check |
| 11415 | before attempting a packet. If an error occurs, *REMOTE_ERRNO |
| 11416 | is set to the error number and -1 is returned. Otherwise the value |
| 11417 | returned by the function is returned. |
| 11418 | |
| 11419 | ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an |
| 11420 | attachment is expected; an error will be reported if there's a |
| 11421 | mismatch. If one is found, *ATTACHMENT will be set to point into |
| 11422 | the packet buffer and *ATTACHMENT_LEN will be set to the |
| 11423 | attachment's length. */ |
| 11424 | |
| 11425 | static int |
| 11426 | remote_hostio_send_command (int command_bytes, int which_packet, |
| 11427 | int *remote_errno, char **attachment, |
| 11428 | int *attachment_len) |
| 11429 | { |
| 11430 | struct remote_state *rs = get_remote_state (); |
| 11431 | int ret, bytes_read; |
| 11432 | char *attachment_tmp; |
| 11433 | |
| 11434 | if (!rs->remote_desc |
| 11435 | || packet_support (which_packet) == PACKET_DISABLE) |
| 11436 | { |
| 11437 | *remote_errno = FILEIO_ENOSYS; |
| 11438 | return -1; |
| 11439 | } |
| 11440 | |
| 11441 | putpkt_binary (rs->buf, command_bytes); |
| 11442 | bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0); |
| 11443 | |
| 11444 | /* If it timed out, something is wrong. Don't try to parse the |
| 11445 | buffer. */ |
| 11446 | if (bytes_read < 0) |
| 11447 | { |
| 11448 | *remote_errno = FILEIO_EINVAL; |
| 11449 | return -1; |
| 11450 | } |
| 11451 | |
| 11452 | switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet])) |
| 11453 | { |
| 11454 | case PACKET_ERROR: |
| 11455 | *remote_errno = FILEIO_EINVAL; |
| 11456 | return -1; |
| 11457 | case PACKET_UNKNOWN: |
| 11458 | *remote_errno = FILEIO_ENOSYS; |
| 11459 | return -1; |
| 11460 | case PACKET_OK: |
| 11461 | break; |
| 11462 | } |
| 11463 | |
| 11464 | if (remote_hostio_parse_result (rs->buf, &ret, remote_errno, |
| 11465 | &attachment_tmp)) |
| 11466 | { |
| 11467 | *remote_errno = FILEIO_EINVAL; |
| 11468 | return -1; |
| 11469 | } |
| 11470 | |
| 11471 | /* Make sure we saw an attachment if and only if we expected one. */ |
| 11472 | if ((attachment_tmp == NULL && attachment != NULL) |
| 11473 | || (attachment_tmp != NULL && attachment == NULL)) |
| 11474 | { |
| 11475 | *remote_errno = FILEIO_EINVAL; |
| 11476 | return -1; |
| 11477 | } |
| 11478 | |
| 11479 | /* If an attachment was found, it must point into the packet buffer; |
| 11480 | work out how many bytes there were. */ |
| 11481 | if (attachment_tmp != NULL) |
| 11482 | { |
| 11483 | *attachment = attachment_tmp; |
| 11484 | *attachment_len = bytes_read - (*attachment - rs->buf); |
| 11485 | } |
| 11486 | |
| 11487 | return ret; |
| 11488 | } |
| 11489 | |
| 11490 | /* Invalidate the readahead cache. */ |
| 11491 | |
| 11492 | static void |
| 11493 | readahead_cache_invalidate (void) |
| 11494 | { |
| 11495 | struct remote_state *rs = get_remote_state (); |
| 11496 | |
| 11497 | rs->readahead_cache.fd = -1; |
| 11498 | } |
| 11499 | |
| 11500 | /* Invalidate the readahead cache if it is holding data for FD. */ |
| 11501 | |
| 11502 | static void |
| 11503 | readahead_cache_invalidate_fd (int fd) |
| 11504 | { |
| 11505 | struct remote_state *rs = get_remote_state (); |
| 11506 | |
| 11507 | if (rs->readahead_cache.fd == fd) |
| 11508 | rs->readahead_cache.fd = -1; |
| 11509 | } |
| 11510 | |
| 11511 | /* Set the filesystem remote_hostio functions that take FILENAME |
| 11512 | arguments will use. Return 0 on success, or -1 if an error |
| 11513 | occurs (and set *REMOTE_ERRNO). */ |
| 11514 | |
| 11515 | static int |
| 11516 | remote_hostio_set_filesystem (struct inferior *inf, int *remote_errno) |
| 11517 | { |
| 11518 | struct remote_state *rs = get_remote_state (); |
| 11519 | int required_pid = (inf == NULL || inf->fake_pid_p) ? 0 : inf->pid; |
| 11520 | char *p = rs->buf; |
| 11521 | int left = get_remote_packet_size () - 1; |
| 11522 | char arg[9]; |
| 11523 | int ret; |
| 11524 | |
| 11525 | if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE) |
| 11526 | return 0; |
| 11527 | |
| 11528 | if (rs->fs_pid != -1 && required_pid == rs->fs_pid) |
| 11529 | return 0; |
| 11530 | |
| 11531 | remote_buffer_add_string (&p, &left, "vFile:setfs:"); |
| 11532 | |
| 11533 | xsnprintf (arg, sizeof (arg), "%x", required_pid); |
| 11534 | remote_buffer_add_string (&p, &left, arg); |
| 11535 | |
| 11536 | ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_setfs, |
| 11537 | remote_errno, NULL, NULL); |
| 11538 | |
| 11539 | if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE) |
| 11540 | return 0; |
| 11541 | |
| 11542 | if (ret == 0) |
| 11543 | rs->fs_pid = required_pid; |
| 11544 | |
| 11545 | return ret; |
| 11546 | } |
| 11547 | |
| 11548 | /* Implementation of to_fileio_open. */ |
| 11549 | |
| 11550 | static int |
| 11551 | remote_hostio_open (struct target_ops *self, |
| 11552 | struct inferior *inf, const char *filename, |
| 11553 | int flags, int mode, int warn_if_slow, |
| 11554 | int *remote_errno) |
| 11555 | { |
| 11556 | struct remote_state *rs = get_remote_state (); |
| 11557 | char *p = rs->buf; |
| 11558 | int left = get_remote_packet_size () - 1; |
| 11559 | |
| 11560 | if (warn_if_slow) |
| 11561 | { |
| 11562 | static int warning_issued = 0; |
| 11563 | |
| 11564 | printf_unfiltered (_("Reading %s from remote target...\n"), |
| 11565 | filename); |
| 11566 | |
| 11567 | if (!warning_issued) |
| 11568 | { |
| 11569 | warning (_("File transfers from remote targets can be slow." |
| 11570 | " Use \"set sysroot\" to access files locally" |
| 11571 | " instead.")); |
| 11572 | warning_issued = 1; |
| 11573 | } |
| 11574 | } |
| 11575 | |
| 11576 | if (remote_hostio_set_filesystem (inf, remote_errno) != 0) |
| 11577 | return -1; |
| 11578 | |
| 11579 | remote_buffer_add_string (&p, &left, "vFile:open:"); |
| 11580 | |
| 11581 | remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename, |
| 11582 | strlen (filename)); |
| 11583 | remote_buffer_add_string (&p, &left, ","); |
| 11584 | |
| 11585 | remote_buffer_add_int (&p, &left, flags); |
| 11586 | remote_buffer_add_string (&p, &left, ","); |
| 11587 | |
| 11588 | remote_buffer_add_int (&p, &left, mode); |
| 11589 | |
| 11590 | return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open, |
| 11591 | remote_errno, NULL, NULL); |
| 11592 | } |
| 11593 | |
| 11594 | /* Implementation of to_fileio_pwrite. */ |
| 11595 | |
| 11596 | static int |
| 11597 | remote_hostio_pwrite (struct target_ops *self, |
| 11598 | int fd, const gdb_byte *write_buf, int len, |
| 11599 | ULONGEST offset, int *remote_errno) |
| 11600 | { |
| 11601 | struct remote_state *rs = get_remote_state (); |
| 11602 | char *p = rs->buf; |
| 11603 | int left = get_remote_packet_size (); |
| 11604 | int out_len; |
| 11605 | |
| 11606 | readahead_cache_invalidate_fd (fd); |
| 11607 | |
| 11608 | remote_buffer_add_string (&p, &left, "vFile:pwrite:"); |
| 11609 | |
| 11610 | remote_buffer_add_int (&p, &left, fd); |
| 11611 | remote_buffer_add_string (&p, &left, ","); |
| 11612 | |
| 11613 | remote_buffer_add_int (&p, &left, offset); |
| 11614 | remote_buffer_add_string (&p, &left, ","); |
| 11615 | |
| 11616 | p += remote_escape_output (write_buf, len, 1, (gdb_byte *) p, &out_len, |
| 11617 | get_remote_packet_size () - (p - rs->buf)); |
| 11618 | |
| 11619 | return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite, |
| 11620 | remote_errno, NULL, NULL); |
| 11621 | } |
| 11622 | |
| 11623 | /* Helper for the implementation of to_fileio_pread. Read the file |
| 11624 | from the remote side with vFile:pread. */ |
| 11625 | |
| 11626 | static int |
| 11627 | remote_hostio_pread_vFile (struct target_ops *self, |
| 11628 | int fd, gdb_byte *read_buf, int len, |
| 11629 | ULONGEST offset, int *remote_errno) |
| 11630 | { |
| 11631 | struct remote_state *rs = get_remote_state (); |
| 11632 | char *p = rs->buf; |
| 11633 | char *attachment; |
| 11634 | int left = get_remote_packet_size (); |
| 11635 | int ret, attachment_len; |
| 11636 | int read_len; |
| 11637 | |
| 11638 | remote_buffer_add_string (&p, &left, "vFile:pread:"); |
| 11639 | |
| 11640 | remote_buffer_add_int (&p, &left, fd); |
| 11641 | remote_buffer_add_string (&p, &left, ","); |
| 11642 | |
| 11643 | remote_buffer_add_int (&p, &left, len); |
| 11644 | remote_buffer_add_string (&p, &left, ","); |
| 11645 | |
| 11646 | remote_buffer_add_int (&p, &left, offset); |
| 11647 | |
| 11648 | ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread, |
| 11649 | remote_errno, &attachment, |
| 11650 | &attachment_len); |
| 11651 | |
| 11652 | if (ret < 0) |
| 11653 | return ret; |
| 11654 | |
| 11655 | read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len, |
| 11656 | read_buf, len); |
| 11657 | if (read_len != ret) |
| 11658 | error (_("Read returned %d, but %d bytes."), ret, (int) read_len); |
| 11659 | |
| 11660 | return ret; |
| 11661 | } |
| 11662 | |
| 11663 | /* Serve pread from the readahead cache. Returns number of bytes |
| 11664 | read, or 0 if the request can't be served from the cache. */ |
| 11665 | |
| 11666 | static int |
| 11667 | remote_hostio_pread_from_cache (struct remote_state *rs, |
| 11668 | int fd, gdb_byte *read_buf, size_t len, |
| 11669 | ULONGEST offset) |
| 11670 | { |
| 11671 | struct readahead_cache *cache = &rs->readahead_cache; |
| 11672 | |
| 11673 | if (cache->fd == fd |
| 11674 | && cache->offset <= offset |
| 11675 | && offset < cache->offset + cache->bufsize) |
| 11676 | { |
| 11677 | ULONGEST max = cache->offset + cache->bufsize; |
| 11678 | |
| 11679 | if (offset + len > max) |
| 11680 | len = max - offset; |
| 11681 | |
| 11682 | memcpy (read_buf, cache->buf + offset - cache->offset, len); |
| 11683 | return len; |
| 11684 | } |
| 11685 | |
| 11686 | return 0; |
| 11687 | } |
| 11688 | |
| 11689 | /* Implementation of to_fileio_pread. */ |
| 11690 | |
| 11691 | static int |
| 11692 | remote_hostio_pread (struct target_ops *self, |
| 11693 | int fd, gdb_byte *read_buf, int len, |
| 11694 | ULONGEST offset, int *remote_errno) |
| 11695 | { |
| 11696 | int ret; |
| 11697 | struct remote_state *rs = get_remote_state (); |
| 11698 | struct readahead_cache *cache = &rs->readahead_cache; |
| 11699 | |
| 11700 | ret = remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset); |
| 11701 | if (ret > 0) |
| 11702 | { |
| 11703 | cache->hit_count++; |
| 11704 | |
| 11705 | if (remote_debug) |
| 11706 | fprintf_unfiltered (gdb_stdlog, "readahead cache hit %s\n", |
| 11707 | pulongest (cache->hit_count)); |
| 11708 | return ret; |
| 11709 | } |
| 11710 | |
| 11711 | cache->miss_count++; |
| 11712 | if (remote_debug) |
| 11713 | fprintf_unfiltered (gdb_stdlog, "readahead cache miss %s\n", |
| 11714 | pulongest (cache->miss_count)); |
| 11715 | |
| 11716 | cache->fd = fd; |
| 11717 | cache->offset = offset; |
| 11718 | cache->bufsize = get_remote_packet_size (); |
| 11719 | cache->buf = (gdb_byte *) xrealloc (cache->buf, cache->bufsize); |
| 11720 | |
| 11721 | ret = remote_hostio_pread_vFile (self, cache->fd, cache->buf, cache->bufsize, |
| 11722 | cache->offset, remote_errno); |
| 11723 | if (ret <= 0) |
| 11724 | { |
| 11725 | readahead_cache_invalidate_fd (fd); |
| 11726 | return ret; |
| 11727 | } |
| 11728 | |
| 11729 | cache->bufsize = ret; |
| 11730 | return remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset); |
| 11731 | } |
| 11732 | |
| 11733 | /* Implementation of to_fileio_close. */ |
| 11734 | |
| 11735 | static int |
| 11736 | remote_hostio_close (struct target_ops *self, int fd, int *remote_errno) |
| 11737 | { |
| 11738 | struct remote_state *rs = get_remote_state (); |
| 11739 | char *p = rs->buf; |
| 11740 | int left = get_remote_packet_size () - 1; |
| 11741 | |
| 11742 | readahead_cache_invalidate_fd (fd); |
| 11743 | |
| 11744 | remote_buffer_add_string (&p, &left, "vFile:close:"); |
| 11745 | |
| 11746 | remote_buffer_add_int (&p, &left, fd); |
| 11747 | |
| 11748 | return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close, |
| 11749 | remote_errno, NULL, NULL); |
| 11750 | } |
| 11751 | |
| 11752 | /* Implementation of to_fileio_unlink. */ |
| 11753 | |
| 11754 | static int |
| 11755 | remote_hostio_unlink (struct target_ops *self, |
| 11756 | struct inferior *inf, const char *filename, |
| 11757 | int *remote_errno) |
| 11758 | { |
| 11759 | struct remote_state *rs = get_remote_state (); |
| 11760 | char *p = rs->buf; |
| 11761 | int left = get_remote_packet_size () - 1; |
| 11762 | |
| 11763 | if (remote_hostio_set_filesystem (inf, remote_errno) != 0) |
| 11764 | return -1; |
| 11765 | |
| 11766 | remote_buffer_add_string (&p, &left, "vFile:unlink:"); |
| 11767 | |
| 11768 | remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename, |
| 11769 | strlen (filename)); |
| 11770 | |
| 11771 | return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink, |
| 11772 | remote_errno, NULL, NULL); |
| 11773 | } |
| 11774 | |
| 11775 | /* Implementation of to_fileio_readlink. */ |
| 11776 | |
| 11777 | static char * |
| 11778 | remote_hostio_readlink (struct target_ops *self, |
| 11779 | struct inferior *inf, const char *filename, |
| 11780 | int *remote_errno) |
| 11781 | { |
| 11782 | struct remote_state *rs = get_remote_state (); |
| 11783 | char *p = rs->buf; |
| 11784 | char *attachment; |
| 11785 | int left = get_remote_packet_size (); |
| 11786 | int len, attachment_len; |
| 11787 | int read_len; |
| 11788 | char *ret; |
| 11789 | |
| 11790 | if (remote_hostio_set_filesystem (inf, remote_errno) != 0) |
| 11791 | return NULL; |
| 11792 | |
| 11793 | remote_buffer_add_string (&p, &left, "vFile:readlink:"); |
| 11794 | |
| 11795 | remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename, |
| 11796 | strlen (filename)); |
| 11797 | |
| 11798 | len = remote_hostio_send_command (p - rs->buf, PACKET_vFile_readlink, |
| 11799 | remote_errno, &attachment, |
| 11800 | &attachment_len); |
| 11801 | |
| 11802 | if (len < 0) |
| 11803 | return NULL; |
| 11804 | |
| 11805 | ret = (char *) xmalloc (len + 1); |
| 11806 | |
| 11807 | read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len, |
| 11808 | (gdb_byte *) ret, len); |
| 11809 | if (read_len != len) |
| 11810 | error (_("Readlink returned %d, but %d bytes."), len, read_len); |
| 11811 | |
| 11812 | ret[len] = '\0'; |
| 11813 | return ret; |
| 11814 | } |
| 11815 | |
| 11816 | /* Implementation of to_fileio_fstat. */ |
| 11817 | |
| 11818 | static int |
| 11819 | remote_hostio_fstat (struct target_ops *self, |
| 11820 | int fd, struct stat *st, |
| 11821 | int *remote_errno) |
| 11822 | { |
| 11823 | struct remote_state *rs = get_remote_state (); |
| 11824 | char *p = rs->buf; |
| 11825 | int left = get_remote_packet_size (); |
| 11826 | int attachment_len, ret; |
| 11827 | char *attachment; |
| 11828 | struct fio_stat fst; |
| 11829 | int read_len; |
| 11830 | |
| 11831 | remote_buffer_add_string (&p, &left, "vFile:fstat:"); |
| 11832 | |
| 11833 | remote_buffer_add_int (&p, &left, fd); |
| 11834 | |
| 11835 | ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_fstat, |
| 11836 | remote_errno, &attachment, |
| 11837 | &attachment_len); |
| 11838 | if (ret < 0) |
| 11839 | { |
| 11840 | if (*remote_errno != FILEIO_ENOSYS) |
| 11841 | return ret; |
| 11842 | |
| 11843 | /* Strictly we should return -1, ENOSYS here, but when |
| 11844 | "set sysroot remote:" was implemented in August 2008 |
| 11845 | BFD's need for a stat function was sidestepped with |
| 11846 | this hack. This was not remedied until March 2015 |
| 11847 | so we retain the previous behavior to avoid breaking |
| 11848 | compatibility. |
| 11849 | |
| 11850 | Note that the memset is a March 2015 addition; older |
| 11851 | GDBs set st_size *and nothing else* so the structure |
| 11852 | would have garbage in all other fields. This might |
| 11853 | break something but retaining the previous behavior |
| 11854 | here would be just too wrong. */ |
| 11855 | |
| 11856 | memset (st, 0, sizeof (struct stat)); |
| 11857 | st->st_size = INT_MAX; |
| 11858 | return 0; |
| 11859 | } |
| 11860 | |
| 11861 | read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len, |
| 11862 | (gdb_byte *) &fst, sizeof (fst)); |
| 11863 | |
| 11864 | if (read_len != ret) |
| 11865 | error (_("vFile:fstat returned %d, but %d bytes."), ret, read_len); |
| 11866 | |
| 11867 | if (read_len != sizeof (fst)) |
| 11868 | error (_("vFile:fstat returned %d bytes, but expecting %d."), |
| 11869 | read_len, (int) sizeof (fst)); |
| 11870 | |
| 11871 | remote_fileio_to_host_stat (&fst, st); |
| 11872 | |
| 11873 | return 0; |
| 11874 | } |
| 11875 | |
| 11876 | /* Implementation of to_filesystem_is_local. */ |
| 11877 | |
| 11878 | static int |
| 11879 | remote_filesystem_is_local (struct target_ops *self) |
| 11880 | { |
| 11881 | /* Valgrind GDB presents itself as a remote target but works |
| 11882 | on the local filesystem: it does not implement remote get |
| 11883 | and users are not expected to set a sysroot. To handle |
| 11884 | this case we treat the remote filesystem as local if the |
| 11885 | sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub |
| 11886 | does not support vFile:open. */ |
| 11887 | if (strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) == 0) |
| 11888 | { |
| 11889 | enum packet_support ps = packet_support (PACKET_vFile_open); |
| 11890 | |
| 11891 | if (ps == PACKET_SUPPORT_UNKNOWN) |
| 11892 | { |
| 11893 | int fd, remote_errno; |
| 11894 | |
| 11895 | /* Try opening a file to probe support. The supplied |
| 11896 | filename is irrelevant, we only care about whether |
| 11897 | the stub recognizes the packet or not. */ |
| 11898 | fd = remote_hostio_open (self, NULL, "just probing", |
| 11899 | FILEIO_O_RDONLY, 0700, 0, |
| 11900 | &remote_errno); |
| 11901 | |
| 11902 | if (fd >= 0) |
| 11903 | remote_hostio_close (self, fd, &remote_errno); |
| 11904 | |
| 11905 | ps = packet_support (PACKET_vFile_open); |
| 11906 | } |
| 11907 | |
| 11908 | if (ps == PACKET_DISABLE) |
| 11909 | { |
| 11910 | static int warning_issued = 0; |
| 11911 | |
| 11912 | if (!warning_issued) |
| 11913 | { |
| 11914 | warning (_("remote target does not support file" |
| 11915 | " transfer, attempting to access files" |
| 11916 | " from local filesystem.")); |
| 11917 | warning_issued = 1; |
| 11918 | } |
| 11919 | |
| 11920 | return 1; |
| 11921 | } |
| 11922 | } |
| 11923 | |
| 11924 | return 0; |
| 11925 | } |
| 11926 | |
| 11927 | static int |
| 11928 | remote_fileio_errno_to_host (int errnum) |
| 11929 | { |
| 11930 | switch (errnum) |
| 11931 | { |
| 11932 | case FILEIO_EPERM: |
| 11933 | return EPERM; |
| 11934 | case FILEIO_ENOENT: |
| 11935 | return ENOENT; |
| 11936 | case FILEIO_EINTR: |
| 11937 | return EINTR; |
| 11938 | case FILEIO_EIO: |
| 11939 | return EIO; |
| 11940 | case FILEIO_EBADF: |
| 11941 | return EBADF; |
| 11942 | case FILEIO_EACCES: |
| 11943 | return EACCES; |
| 11944 | case FILEIO_EFAULT: |
| 11945 | return EFAULT; |
| 11946 | case FILEIO_EBUSY: |
| 11947 | return EBUSY; |
| 11948 | case FILEIO_EEXIST: |
| 11949 | return EEXIST; |
| 11950 | case FILEIO_ENODEV: |
| 11951 | return ENODEV; |
| 11952 | case FILEIO_ENOTDIR: |
| 11953 | return ENOTDIR; |
| 11954 | case FILEIO_EISDIR: |
| 11955 | return EISDIR; |
| 11956 | case FILEIO_EINVAL: |
| 11957 | return EINVAL; |
| 11958 | case FILEIO_ENFILE: |
| 11959 | return ENFILE; |
| 11960 | case FILEIO_EMFILE: |
| 11961 | return EMFILE; |
| 11962 | case FILEIO_EFBIG: |
| 11963 | return EFBIG; |
| 11964 | case FILEIO_ENOSPC: |
| 11965 | return ENOSPC; |
| 11966 | case FILEIO_ESPIPE: |
| 11967 | return ESPIPE; |
| 11968 | case FILEIO_EROFS: |
| 11969 | return EROFS; |
| 11970 | case FILEIO_ENOSYS: |
| 11971 | return ENOSYS; |
| 11972 | case FILEIO_ENAMETOOLONG: |
| 11973 | return ENAMETOOLONG; |
| 11974 | } |
| 11975 | return -1; |
| 11976 | } |
| 11977 | |
| 11978 | static char * |
| 11979 | remote_hostio_error (int errnum) |
| 11980 | { |
| 11981 | int host_error = remote_fileio_errno_to_host (errnum); |
| 11982 | |
| 11983 | if (host_error == -1) |
| 11984 | error (_("Unknown remote I/O error %d"), errnum); |
| 11985 | else |
| 11986 | error (_("Remote I/O error: %s"), safe_strerror (host_error)); |
| 11987 | } |
| 11988 | |
| 11989 | static void |
| 11990 | remote_hostio_close_cleanup (void *opaque) |
| 11991 | { |
| 11992 | int fd = *(int *) opaque; |
| 11993 | int remote_errno; |
| 11994 | |
| 11995 | remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno); |
| 11996 | } |
| 11997 | |
| 11998 | void |
| 11999 | remote_file_put (const char *local_file, const char *remote_file, int from_tty) |
| 12000 | { |
| 12001 | struct cleanup *back_to, *close_cleanup; |
| 12002 | int retcode, fd, remote_errno, bytes, io_size; |
| 12003 | gdb_byte *buffer; |
| 12004 | int bytes_in_buffer; |
| 12005 | int saw_eof; |
| 12006 | ULONGEST offset; |
| 12007 | struct remote_state *rs = get_remote_state (); |
| 12008 | |
| 12009 | if (!rs->remote_desc) |
| 12010 | error (_("command can only be used with remote target")); |
| 12011 | |
| 12012 | gdb_file_up file = gdb_fopen_cloexec (local_file, "rb"); |
| 12013 | if (file == NULL) |
| 12014 | perror_with_name (local_file); |
| 12015 | |
| 12016 | fd = remote_hostio_open (find_target_at (process_stratum), NULL, |
| 12017 | remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT |
| 12018 | | FILEIO_O_TRUNC), |
| 12019 | 0700, 0, &remote_errno); |
| 12020 | if (fd == -1) |
| 12021 | remote_hostio_error (remote_errno); |
| 12022 | |
| 12023 | /* Send up to this many bytes at once. They won't all fit in the |
| 12024 | remote packet limit, so we'll transfer slightly fewer. */ |
| 12025 | io_size = get_remote_packet_size (); |
| 12026 | buffer = (gdb_byte *) xmalloc (io_size); |
| 12027 | back_to = make_cleanup (xfree, buffer); |
| 12028 | |
| 12029 | close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd); |
| 12030 | |
| 12031 | bytes_in_buffer = 0; |
| 12032 | saw_eof = 0; |
| 12033 | offset = 0; |
| 12034 | while (bytes_in_buffer || !saw_eof) |
| 12035 | { |
| 12036 | if (!saw_eof) |
| 12037 | { |
| 12038 | bytes = fread (buffer + bytes_in_buffer, 1, |
| 12039 | io_size - bytes_in_buffer, |
| 12040 | file.get ()); |
| 12041 | if (bytes == 0) |
| 12042 | { |
| 12043 | if (ferror (file.get ())) |
| 12044 | error (_("Error reading %s."), local_file); |
| 12045 | else |
| 12046 | { |
| 12047 | /* EOF. Unless there is something still in the |
| 12048 | buffer from the last iteration, we are done. */ |
| 12049 | saw_eof = 1; |
| 12050 | if (bytes_in_buffer == 0) |
| 12051 | break; |
| 12052 | } |
| 12053 | } |
| 12054 | } |
| 12055 | else |
| 12056 | bytes = 0; |
| 12057 | |
| 12058 | bytes += bytes_in_buffer; |
| 12059 | bytes_in_buffer = 0; |
| 12060 | |
| 12061 | retcode = remote_hostio_pwrite (find_target_at (process_stratum), |
| 12062 | fd, buffer, bytes, |
| 12063 | offset, &remote_errno); |
| 12064 | |
| 12065 | if (retcode < 0) |
| 12066 | remote_hostio_error (remote_errno); |
| 12067 | else if (retcode == 0) |
| 12068 | error (_("Remote write of %d bytes returned 0!"), bytes); |
| 12069 | else if (retcode < bytes) |
| 12070 | { |
| 12071 | /* Short write. Save the rest of the read data for the next |
| 12072 | write. */ |
| 12073 | bytes_in_buffer = bytes - retcode; |
| 12074 | memmove (buffer, buffer + retcode, bytes_in_buffer); |
| 12075 | } |
| 12076 | |
| 12077 | offset += retcode; |
| 12078 | } |
| 12079 | |
| 12080 | discard_cleanups (close_cleanup); |
| 12081 | if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno)) |
| 12082 | remote_hostio_error (remote_errno); |
| 12083 | |
| 12084 | if (from_tty) |
| 12085 | printf_filtered (_("Successfully sent file \"%s\".\n"), local_file); |
| 12086 | do_cleanups (back_to); |
| 12087 | } |
| 12088 | |
| 12089 | void |
| 12090 | remote_file_get (const char *remote_file, const char *local_file, int from_tty) |
| 12091 | { |
| 12092 | struct cleanup *back_to, *close_cleanup; |
| 12093 | int fd, remote_errno, bytes, io_size; |
| 12094 | gdb_byte *buffer; |
| 12095 | ULONGEST offset; |
| 12096 | struct remote_state *rs = get_remote_state (); |
| 12097 | |
| 12098 | if (!rs->remote_desc) |
| 12099 | error (_("command can only be used with remote target")); |
| 12100 | |
| 12101 | fd = remote_hostio_open (find_target_at (process_stratum), NULL, |
| 12102 | remote_file, FILEIO_O_RDONLY, 0, 0, |
| 12103 | &remote_errno); |
| 12104 | if (fd == -1) |
| 12105 | remote_hostio_error (remote_errno); |
| 12106 | |
| 12107 | gdb_file_up file = gdb_fopen_cloexec (local_file, "wb"); |
| 12108 | if (file == NULL) |
| 12109 | perror_with_name (local_file); |
| 12110 | |
| 12111 | /* Send up to this many bytes at once. They won't all fit in the |
| 12112 | remote packet limit, so we'll transfer slightly fewer. */ |
| 12113 | io_size = get_remote_packet_size (); |
| 12114 | buffer = (gdb_byte *) xmalloc (io_size); |
| 12115 | back_to = make_cleanup (xfree, buffer); |
| 12116 | |
| 12117 | close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd); |
| 12118 | |
| 12119 | offset = 0; |
| 12120 | while (1) |
| 12121 | { |
| 12122 | bytes = remote_hostio_pread (find_target_at (process_stratum), |
| 12123 | fd, buffer, io_size, offset, &remote_errno); |
| 12124 | if (bytes == 0) |
| 12125 | /* Success, but no bytes, means end-of-file. */ |
| 12126 | break; |
| 12127 | if (bytes == -1) |
| 12128 | remote_hostio_error (remote_errno); |
| 12129 | |
| 12130 | offset += bytes; |
| 12131 | |
| 12132 | bytes = fwrite (buffer, 1, bytes, file.get ()); |
| 12133 | if (bytes == 0) |
| 12134 | perror_with_name (local_file); |
| 12135 | } |
| 12136 | |
| 12137 | discard_cleanups (close_cleanup); |
| 12138 | if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno)) |
| 12139 | remote_hostio_error (remote_errno); |
| 12140 | |
| 12141 | if (from_tty) |
| 12142 | printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file); |
| 12143 | do_cleanups (back_to); |
| 12144 | } |
| 12145 | |
| 12146 | void |
| 12147 | remote_file_delete (const char *remote_file, int from_tty) |
| 12148 | { |
| 12149 | int retcode, remote_errno; |
| 12150 | struct remote_state *rs = get_remote_state (); |
| 12151 | |
| 12152 | if (!rs->remote_desc) |
| 12153 | error (_("command can only be used with remote target")); |
| 12154 | |
| 12155 | retcode = remote_hostio_unlink (find_target_at (process_stratum), |
| 12156 | NULL, remote_file, &remote_errno); |
| 12157 | if (retcode == -1) |
| 12158 | remote_hostio_error (remote_errno); |
| 12159 | |
| 12160 | if (from_tty) |
| 12161 | printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file); |
| 12162 | } |
| 12163 | |
| 12164 | static void |
| 12165 | remote_put_command (const char *args, int from_tty) |
| 12166 | { |
| 12167 | if (args == NULL) |
| 12168 | error_no_arg (_("file to put")); |
| 12169 | |
| 12170 | gdb_argv argv (args); |
| 12171 | if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL) |
| 12172 | error (_("Invalid parameters to remote put")); |
| 12173 | |
| 12174 | remote_file_put (argv[0], argv[1], from_tty); |
| 12175 | } |
| 12176 | |
| 12177 | static void |
| 12178 | remote_get_command (const char *args, int from_tty) |
| 12179 | { |
| 12180 | if (args == NULL) |
| 12181 | error_no_arg (_("file to get")); |
| 12182 | |
| 12183 | gdb_argv argv (args); |
| 12184 | if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL) |
| 12185 | error (_("Invalid parameters to remote get")); |
| 12186 | |
| 12187 | remote_file_get (argv[0], argv[1], from_tty); |
| 12188 | } |
| 12189 | |
| 12190 | static void |
| 12191 | remote_delete_command (const char *args, int from_tty) |
| 12192 | { |
| 12193 | if (args == NULL) |
| 12194 | error_no_arg (_("file to delete")); |
| 12195 | |
| 12196 | gdb_argv argv (args); |
| 12197 | if (argv[0] == NULL || argv[1] != NULL) |
| 12198 | error (_("Invalid parameters to remote delete")); |
| 12199 | |
| 12200 | remote_file_delete (argv[0], from_tty); |
| 12201 | } |
| 12202 | |
| 12203 | static void |
| 12204 | remote_command (const char *args, int from_tty) |
| 12205 | { |
| 12206 | help_list (remote_cmdlist, "remote ", all_commands, gdb_stdout); |
| 12207 | } |
| 12208 | |
| 12209 | static int |
| 12210 | remote_can_execute_reverse (struct target_ops *self) |
| 12211 | { |
| 12212 | if (packet_support (PACKET_bs) == PACKET_ENABLE |
| 12213 | || packet_support (PACKET_bc) == PACKET_ENABLE) |
| 12214 | return 1; |
| 12215 | else |
| 12216 | return 0; |
| 12217 | } |
| 12218 | |
| 12219 | static int |
| 12220 | remote_supports_non_stop (struct target_ops *self) |
| 12221 | { |
| 12222 | return 1; |
| 12223 | } |
| 12224 | |
| 12225 | static int |
| 12226 | remote_supports_disable_randomization (struct target_ops *self) |
| 12227 | { |
| 12228 | /* Only supported in extended mode. */ |
| 12229 | return 0; |
| 12230 | } |
| 12231 | |
| 12232 | static int |
| 12233 | remote_supports_multi_process (struct target_ops *self) |
| 12234 | { |
| 12235 | struct remote_state *rs = get_remote_state (); |
| 12236 | |
| 12237 | return remote_multi_process_p (rs); |
| 12238 | } |
| 12239 | |
| 12240 | static int |
| 12241 | remote_supports_cond_tracepoints (void) |
| 12242 | { |
| 12243 | return packet_support (PACKET_ConditionalTracepoints) == PACKET_ENABLE; |
| 12244 | } |
| 12245 | |
| 12246 | static int |
| 12247 | remote_supports_cond_breakpoints (struct target_ops *self) |
| 12248 | { |
| 12249 | return packet_support (PACKET_ConditionalBreakpoints) == PACKET_ENABLE; |
| 12250 | } |
| 12251 | |
| 12252 | static int |
| 12253 | remote_supports_fast_tracepoints (void) |
| 12254 | { |
| 12255 | return packet_support (PACKET_FastTracepoints) == PACKET_ENABLE; |
| 12256 | } |
| 12257 | |
| 12258 | static int |
| 12259 | remote_supports_static_tracepoints (void) |
| 12260 | { |
| 12261 | return packet_support (PACKET_StaticTracepoints) == PACKET_ENABLE; |
| 12262 | } |
| 12263 | |
| 12264 | static int |
| 12265 | remote_supports_install_in_trace (void) |
| 12266 | { |
| 12267 | return packet_support (PACKET_InstallInTrace) == PACKET_ENABLE; |
| 12268 | } |
| 12269 | |
| 12270 | static int |
| 12271 | remote_supports_enable_disable_tracepoint (struct target_ops *self) |
| 12272 | { |
| 12273 | return (packet_support (PACKET_EnableDisableTracepoints_feature) |
| 12274 | == PACKET_ENABLE); |
| 12275 | } |
| 12276 | |
| 12277 | static int |
| 12278 | remote_supports_string_tracing (struct target_ops *self) |
| 12279 | { |
| 12280 | return packet_support (PACKET_tracenz_feature) == PACKET_ENABLE; |
| 12281 | } |
| 12282 | |
| 12283 | static int |
| 12284 | remote_can_run_breakpoint_commands (struct target_ops *self) |
| 12285 | { |
| 12286 | return packet_support (PACKET_BreakpointCommands) == PACKET_ENABLE; |
| 12287 | } |
| 12288 | |
| 12289 | static void |
| 12290 | remote_trace_init (struct target_ops *self) |
| 12291 | { |
| 12292 | struct remote_state *rs = get_remote_state (); |
| 12293 | |
| 12294 | putpkt ("QTinit"); |
| 12295 | remote_get_noisy_reply (); |
| 12296 | if (strcmp (rs->buf, "OK") != 0) |
| 12297 | error (_("Target does not support this command.")); |
| 12298 | } |
| 12299 | |
| 12300 | static void free_actions_list (char **actions_list); |
| 12301 | static void free_actions_list_cleanup_wrapper (void *); |
| 12302 | static void |
| 12303 | free_actions_list_cleanup_wrapper (void *al) |
| 12304 | { |
| 12305 | free_actions_list ((char **) al); |
| 12306 | } |
| 12307 | |
| 12308 | static void |
| 12309 | free_actions_list (char **actions_list) |
| 12310 | { |
| 12311 | int ndx; |
| 12312 | |
| 12313 | if (actions_list == 0) |
| 12314 | return; |
| 12315 | |
| 12316 | for (ndx = 0; actions_list[ndx]; ndx++) |
| 12317 | xfree (actions_list[ndx]); |
| 12318 | |
| 12319 | xfree (actions_list); |
| 12320 | } |
| 12321 | |
| 12322 | /* Recursive routine to walk through command list including loops, and |
| 12323 | download packets for each command. */ |
| 12324 | |
| 12325 | static void |
| 12326 | remote_download_command_source (int num, ULONGEST addr, |
| 12327 | struct command_line *cmds) |
| 12328 | { |
| 12329 | struct remote_state *rs = get_remote_state (); |
| 12330 | struct command_line *cmd; |
| 12331 | |
| 12332 | for (cmd = cmds; cmd; cmd = cmd->next) |
| 12333 | { |
| 12334 | QUIT; /* Allow user to bail out with ^C. */ |
| 12335 | strcpy (rs->buf, "QTDPsrc:"); |
| 12336 | encode_source_string (num, addr, "cmd", cmd->line, |
| 12337 | rs->buf + strlen (rs->buf), |
| 12338 | rs->buf_size - strlen (rs->buf)); |
| 12339 | putpkt (rs->buf); |
| 12340 | remote_get_noisy_reply (); |
| 12341 | if (strcmp (rs->buf, "OK")) |
| 12342 | warning (_("Target does not support source download.")); |
| 12343 | |
| 12344 | if (cmd->control_type == while_control |
| 12345 | || cmd->control_type == while_stepping_control) |
| 12346 | { |
| 12347 | remote_download_command_source (num, addr, *cmd->body_list); |
| 12348 | |
| 12349 | QUIT; /* Allow user to bail out with ^C. */ |
| 12350 | strcpy (rs->buf, "QTDPsrc:"); |
| 12351 | encode_source_string (num, addr, "cmd", "end", |
| 12352 | rs->buf + strlen (rs->buf), |
| 12353 | rs->buf_size - strlen (rs->buf)); |
| 12354 | putpkt (rs->buf); |
| 12355 | remote_get_noisy_reply (); |
| 12356 | if (strcmp (rs->buf, "OK")) |
| 12357 | warning (_("Target does not support source download.")); |
| 12358 | } |
| 12359 | } |
| 12360 | } |
| 12361 | |
| 12362 | static void |
| 12363 | remote_download_tracepoint (struct target_ops *self, struct bp_location *loc) |
| 12364 | { |
| 12365 | #define BUF_SIZE 2048 |
| 12366 | |
| 12367 | CORE_ADDR tpaddr; |
| 12368 | char addrbuf[40]; |
| 12369 | char buf[BUF_SIZE]; |
| 12370 | char **tdp_actions; |
| 12371 | char **stepping_actions; |
| 12372 | int ndx; |
| 12373 | struct cleanup *old_chain = NULL; |
| 12374 | char *pkt; |
| 12375 | struct breakpoint *b = loc->owner; |
| 12376 | struct tracepoint *t = (struct tracepoint *) b; |
| 12377 | struct remote_state *rs = get_remote_state (); |
| 12378 | |
| 12379 | encode_actions_rsp (loc, &tdp_actions, &stepping_actions); |
| 12380 | old_chain = make_cleanup (free_actions_list_cleanup_wrapper, |
| 12381 | tdp_actions); |
| 12382 | (void) make_cleanup (free_actions_list_cleanup_wrapper, |
| 12383 | stepping_actions); |
| 12384 | |
| 12385 | tpaddr = loc->address; |
| 12386 | sprintf_vma (addrbuf, tpaddr); |
| 12387 | xsnprintf (buf, BUF_SIZE, "QTDP:%x:%s:%c:%lx:%x", b->number, |
| 12388 | addrbuf, /* address */ |
| 12389 | (b->enable_state == bp_enabled ? 'E' : 'D'), |
| 12390 | t->step_count, t->pass_count); |
| 12391 | /* Fast tracepoints are mostly handled by the target, but we can |
| 12392 | tell the target how big of an instruction block should be moved |
| 12393 | around. */ |
| 12394 | if (b->type == bp_fast_tracepoint) |
| 12395 | { |
| 12396 | /* Only test for support at download time; we may not know |
| 12397 | target capabilities at definition time. */ |
| 12398 | if (remote_supports_fast_tracepoints ()) |
| 12399 | { |
| 12400 | if (gdbarch_fast_tracepoint_valid_at (loc->gdbarch, tpaddr, |
| 12401 | NULL)) |
| 12402 | xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":F%x", |
| 12403 | gdb_insn_length (loc->gdbarch, tpaddr)); |
| 12404 | else |
| 12405 | /* If it passed validation at definition but fails now, |
| 12406 | something is very wrong. */ |
| 12407 | internal_error (__FILE__, __LINE__, |
| 12408 | _("Fast tracepoint not " |
| 12409 | "valid during download")); |
| 12410 | } |
| 12411 | else |
| 12412 | /* Fast tracepoints are functionally identical to regular |
| 12413 | tracepoints, so don't take lack of support as a reason to |
| 12414 | give up on the trace run. */ |
| 12415 | warning (_("Target does not support fast tracepoints, " |
| 12416 | "downloading %d as regular tracepoint"), b->number); |
| 12417 | } |
| 12418 | else if (b->type == bp_static_tracepoint) |
| 12419 | { |
| 12420 | /* Only test for support at download time; we may not know |
| 12421 | target capabilities at definition time. */ |
| 12422 | if (remote_supports_static_tracepoints ()) |
| 12423 | { |
| 12424 | struct static_tracepoint_marker marker; |
| 12425 | |
| 12426 | if (target_static_tracepoint_marker_at (tpaddr, &marker)) |
| 12427 | strcat (buf, ":S"); |
| 12428 | else |
| 12429 | error (_("Static tracepoint not valid during download")); |
| 12430 | } |
| 12431 | else |
| 12432 | /* Fast tracepoints are functionally identical to regular |
| 12433 | tracepoints, so don't take lack of support as a reason |
| 12434 | to give up on the trace run. */ |
| 12435 | error (_("Target does not support static tracepoints")); |
| 12436 | } |
| 12437 | /* If the tracepoint has a conditional, make it into an agent |
| 12438 | expression and append to the definition. */ |
| 12439 | if (loc->cond) |
| 12440 | { |
| 12441 | /* Only test support at download time, we may not know target |
| 12442 | capabilities at definition time. */ |
| 12443 | if (remote_supports_cond_tracepoints ()) |
| 12444 | { |
| 12445 | agent_expr_up aexpr = gen_eval_for_expr (tpaddr, loc->cond.get ()); |
| 12446 | xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":X%x,", |
| 12447 | aexpr->len); |
| 12448 | pkt = buf + strlen (buf); |
| 12449 | for (ndx = 0; ndx < aexpr->len; ++ndx) |
| 12450 | pkt = pack_hex_byte (pkt, aexpr->buf[ndx]); |
| 12451 | *pkt = '\0'; |
| 12452 | } |
| 12453 | else |
| 12454 | warning (_("Target does not support conditional tracepoints, " |
| 12455 | "ignoring tp %d cond"), b->number); |
| 12456 | } |
| 12457 | |
| 12458 | if (b->commands || *default_collect) |
| 12459 | strcat (buf, "-"); |
| 12460 | putpkt (buf); |
| 12461 | remote_get_noisy_reply (); |
| 12462 | if (strcmp (rs->buf, "OK")) |
| 12463 | error (_("Target does not support tracepoints.")); |
| 12464 | |
| 12465 | /* do_single_steps (t); */ |
| 12466 | if (tdp_actions) |
| 12467 | { |
| 12468 | for (ndx = 0; tdp_actions[ndx]; ndx++) |
| 12469 | { |
| 12470 | QUIT; /* Allow user to bail out with ^C. */ |
| 12471 | xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%c", |
| 12472 | b->number, addrbuf, /* address */ |
| 12473 | tdp_actions[ndx], |
| 12474 | ((tdp_actions[ndx + 1] || stepping_actions) |
| 12475 | ? '-' : 0)); |
| 12476 | putpkt (buf); |
| 12477 | remote_get_noisy_reply (); |
| 12478 | if (strcmp (rs->buf, "OK")) |
| 12479 | error (_("Error on target while setting tracepoints.")); |
| 12480 | } |
| 12481 | } |
| 12482 | if (stepping_actions) |
| 12483 | { |
| 12484 | for (ndx = 0; stepping_actions[ndx]; ndx++) |
| 12485 | { |
| 12486 | QUIT; /* Allow user to bail out with ^C. */ |
| 12487 | xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%s%s", |
| 12488 | b->number, addrbuf, /* address */ |
| 12489 | ((ndx == 0) ? "S" : ""), |
| 12490 | stepping_actions[ndx], |
| 12491 | (stepping_actions[ndx + 1] ? "-" : "")); |
| 12492 | putpkt (buf); |
| 12493 | remote_get_noisy_reply (); |
| 12494 | if (strcmp (rs->buf, "OK")) |
| 12495 | error (_("Error on target while setting tracepoints.")); |
| 12496 | } |
| 12497 | } |
| 12498 | |
| 12499 | if (packet_support (PACKET_TracepointSource) == PACKET_ENABLE) |
| 12500 | { |
| 12501 | if (b->location != NULL) |
| 12502 | { |
| 12503 | strcpy (buf, "QTDPsrc:"); |
| 12504 | encode_source_string (b->number, loc->address, "at", |
| 12505 | event_location_to_string (b->location.get ()), |
| 12506 | buf + strlen (buf), 2048 - strlen (buf)); |
| 12507 | putpkt (buf); |
| 12508 | remote_get_noisy_reply (); |
| 12509 | if (strcmp (rs->buf, "OK")) |
| 12510 | warning (_("Target does not support source download.")); |
| 12511 | } |
| 12512 | if (b->cond_string) |
| 12513 | { |
| 12514 | strcpy (buf, "QTDPsrc:"); |
| 12515 | encode_source_string (b->number, loc->address, |
| 12516 | "cond", b->cond_string, buf + strlen (buf), |
| 12517 | 2048 - strlen (buf)); |
| 12518 | putpkt (buf); |
| 12519 | remote_get_noisy_reply (); |
| 12520 | if (strcmp (rs->buf, "OK")) |
| 12521 | warning (_("Target does not support source download.")); |
| 12522 | } |
| 12523 | remote_download_command_source (b->number, loc->address, |
| 12524 | breakpoint_commands (b)); |
| 12525 | } |
| 12526 | |
| 12527 | do_cleanups (old_chain); |
| 12528 | } |
| 12529 | |
| 12530 | static int |
| 12531 | remote_can_download_tracepoint (struct target_ops *self) |
| 12532 | { |
| 12533 | struct remote_state *rs = get_remote_state (); |
| 12534 | struct trace_status *ts; |
| 12535 | int status; |
| 12536 | |
| 12537 | /* Don't try to install tracepoints until we've relocated our |
| 12538 | symbols, and fetched and merged the target's tracepoint list with |
| 12539 | ours. */ |
| 12540 | if (rs->starting_up) |
| 12541 | return 0; |
| 12542 | |
| 12543 | ts = current_trace_status (); |
| 12544 | status = remote_get_trace_status (self, ts); |
| 12545 | |
| 12546 | if (status == -1 || !ts->running_known || !ts->running) |
| 12547 | return 0; |
| 12548 | |
| 12549 | /* If we are in a tracing experiment, but remote stub doesn't support |
| 12550 | installing tracepoint in trace, we have to return. */ |
| 12551 | if (!remote_supports_install_in_trace ()) |
| 12552 | return 0; |
| 12553 | |
| 12554 | return 1; |
| 12555 | } |
| 12556 | |
| 12557 | |
| 12558 | static void |
| 12559 | remote_download_trace_state_variable (struct target_ops *self, |
| 12560 | struct trace_state_variable *tsv) |
| 12561 | { |
| 12562 | struct remote_state *rs = get_remote_state (); |
| 12563 | char *p; |
| 12564 | |
| 12565 | xsnprintf (rs->buf, get_remote_packet_size (), "QTDV:%x:%s:%x:", |
| 12566 | tsv->number, phex ((ULONGEST) tsv->initial_value, 8), |
| 12567 | tsv->builtin); |
| 12568 | p = rs->buf + strlen (rs->buf); |
| 12569 | if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ()) |
| 12570 | error (_("Trace state variable name too long for tsv definition packet")); |
| 12571 | p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, strlen (tsv->name)); |
| 12572 | *p++ = '\0'; |
| 12573 | putpkt (rs->buf); |
| 12574 | remote_get_noisy_reply (); |
| 12575 | if (*rs->buf == '\0') |
| 12576 | error (_("Target does not support this command.")); |
| 12577 | if (strcmp (rs->buf, "OK") != 0) |
| 12578 | error (_("Error on target while downloading trace state variable.")); |
| 12579 | } |
| 12580 | |
| 12581 | static void |
| 12582 | remote_enable_tracepoint (struct target_ops *self, |
| 12583 | struct bp_location *location) |
| 12584 | { |
| 12585 | struct remote_state *rs = get_remote_state (); |
| 12586 | char addr_buf[40]; |
| 12587 | |
| 12588 | sprintf_vma (addr_buf, location->address); |
| 12589 | xsnprintf (rs->buf, get_remote_packet_size (), "QTEnable:%x:%s", |
| 12590 | location->owner->number, addr_buf); |
| 12591 | putpkt (rs->buf); |
| 12592 | remote_get_noisy_reply (); |
| 12593 | if (*rs->buf == '\0') |
| 12594 | error (_("Target does not support enabling tracepoints while a trace run is ongoing.")); |
| 12595 | if (strcmp (rs->buf, "OK") != 0) |
| 12596 | error (_("Error on target while enabling tracepoint.")); |
| 12597 | } |
| 12598 | |
| 12599 | static void |
| 12600 | remote_disable_tracepoint (struct target_ops *self, |
| 12601 | struct bp_location *location) |
| 12602 | { |
| 12603 | struct remote_state *rs = get_remote_state (); |
| 12604 | char addr_buf[40]; |
| 12605 | |
| 12606 | sprintf_vma (addr_buf, location->address); |
| 12607 | xsnprintf (rs->buf, get_remote_packet_size (), "QTDisable:%x:%s", |
| 12608 | location->owner->number, addr_buf); |
| 12609 | putpkt (rs->buf); |
| 12610 | remote_get_noisy_reply (); |
| 12611 | if (*rs->buf == '\0') |
| 12612 | error (_("Target does not support disabling tracepoints while a trace run is ongoing.")); |
| 12613 | if (strcmp (rs->buf, "OK") != 0) |
| 12614 | error (_("Error on target while disabling tracepoint.")); |
| 12615 | } |
| 12616 | |
| 12617 | static void |
| 12618 | remote_trace_set_readonly_regions (struct target_ops *self) |
| 12619 | { |
| 12620 | asection *s; |
| 12621 | bfd *abfd = NULL; |
| 12622 | bfd_size_type size; |
| 12623 | bfd_vma vma; |
| 12624 | int anysecs = 0; |
| 12625 | int offset = 0; |
| 12626 | |
| 12627 | if (!exec_bfd) |
| 12628 | return; /* No information to give. */ |
| 12629 | |
| 12630 | struct remote_state *rs = get_remote_state (); |
| 12631 | |
| 12632 | strcpy (rs->buf, "QTro"); |
| 12633 | offset = strlen (rs->buf); |
| 12634 | for (s = exec_bfd->sections; s; s = s->next) |
| 12635 | { |
| 12636 | char tmp1[40], tmp2[40]; |
| 12637 | int sec_length; |
| 12638 | |
| 12639 | if ((s->flags & SEC_LOAD) == 0 || |
| 12640 | /* (s->flags & SEC_CODE) == 0 || */ |
| 12641 | (s->flags & SEC_READONLY) == 0) |
| 12642 | continue; |
| 12643 | |
| 12644 | anysecs = 1; |
| 12645 | vma = bfd_get_section_vma (abfd, s); |
| 12646 | size = bfd_get_section_size (s); |
| 12647 | sprintf_vma (tmp1, vma); |
| 12648 | sprintf_vma (tmp2, vma + size); |
| 12649 | sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2); |
| 12650 | if (offset + sec_length + 1 > rs->buf_size) |
| 12651 | { |
| 12652 | if (packet_support (PACKET_qXfer_traceframe_info) != PACKET_ENABLE) |
| 12653 | warning (_("\ |
| 12654 | Too many sections for read-only sections definition packet.")); |
| 12655 | break; |
| 12656 | } |
| 12657 | xsnprintf (rs->buf + offset, rs->buf_size - offset, ":%s,%s", |
| 12658 | tmp1, tmp2); |
| 12659 | offset += sec_length; |
| 12660 | } |
| 12661 | if (anysecs) |
| 12662 | { |
| 12663 | putpkt (rs->buf); |
| 12664 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 12665 | } |
| 12666 | } |
| 12667 | |
| 12668 | static void |
| 12669 | remote_trace_start (struct target_ops *self) |
| 12670 | { |
| 12671 | struct remote_state *rs = get_remote_state (); |
| 12672 | |
| 12673 | putpkt ("QTStart"); |
| 12674 | remote_get_noisy_reply (); |
| 12675 | if (*rs->buf == '\0') |
| 12676 | error (_("Target does not support this command.")); |
| 12677 | if (strcmp (rs->buf, "OK") != 0) |
| 12678 | error (_("Bogus reply from target: %s"), rs->buf); |
| 12679 | } |
| 12680 | |
| 12681 | static int |
| 12682 | remote_get_trace_status (struct target_ops *self, struct trace_status *ts) |
| 12683 | { |
| 12684 | /* Initialize it just to avoid a GCC false warning. */ |
| 12685 | char *p = NULL; |
| 12686 | /* FIXME we need to get register block size some other way. */ |
| 12687 | extern int trace_regblock_size; |
| 12688 | enum packet_result result; |
| 12689 | struct remote_state *rs = get_remote_state (); |
| 12690 | |
| 12691 | if (packet_support (PACKET_qTStatus) == PACKET_DISABLE) |
| 12692 | return -1; |
| 12693 | |
| 12694 | trace_regblock_size |
| 12695 | = get_remote_arch_state (target_gdbarch ())->sizeof_g_packet; |
| 12696 | |
| 12697 | putpkt ("qTStatus"); |
| 12698 | |
| 12699 | TRY |
| 12700 | { |
| 12701 | p = remote_get_noisy_reply (); |
| 12702 | } |
| 12703 | CATCH (ex, RETURN_MASK_ERROR) |
| 12704 | { |
| 12705 | if (ex.error != TARGET_CLOSE_ERROR) |
| 12706 | { |
| 12707 | exception_fprintf (gdb_stderr, ex, "qTStatus: "); |
| 12708 | return -1; |
| 12709 | } |
| 12710 | throw_exception (ex); |
| 12711 | } |
| 12712 | END_CATCH |
| 12713 | |
| 12714 | result = packet_ok (p, &remote_protocol_packets[PACKET_qTStatus]); |
| 12715 | |
| 12716 | /* If the remote target doesn't do tracing, flag it. */ |
| 12717 | if (result == PACKET_UNKNOWN) |
| 12718 | return -1; |
| 12719 | |
| 12720 | /* We're working with a live target. */ |
| 12721 | ts->filename = NULL; |
| 12722 | |
| 12723 | if (*p++ != 'T') |
| 12724 | error (_("Bogus trace status reply from target: %s"), rs->buf); |
| 12725 | |
| 12726 | /* Function 'parse_trace_status' sets default value of each field of |
| 12727 | 'ts' at first, so we don't have to do it here. */ |
| 12728 | parse_trace_status (p, ts); |
| 12729 | |
| 12730 | return ts->running; |
| 12731 | } |
| 12732 | |
| 12733 | static void |
| 12734 | remote_get_tracepoint_status (struct target_ops *self, struct breakpoint *bp, |
| 12735 | struct uploaded_tp *utp) |
| 12736 | { |
| 12737 | struct remote_state *rs = get_remote_state (); |
| 12738 | char *reply; |
| 12739 | struct bp_location *loc; |
| 12740 | struct tracepoint *tp = (struct tracepoint *) bp; |
| 12741 | size_t size = get_remote_packet_size (); |
| 12742 | |
| 12743 | if (tp) |
| 12744 | { |
| 12745 | tp->hit_count = 0; |
| 12746 | tp->traceframe_usage = 0; |
| 12747 | for (loc = tp->loc; loc; loc = loc->next) |
| 12748 | { |
| 12749 | /* If the tracepoint was never downloaded, don't go asking for |
| 12750 | any status. */ |
| 12751 | if (tp->number_on_target == 0) |
| 12752 | continue; |
| 12753 | xsnprintf (rs->buf, size, "qTP:%x:%s", tp->number_on_target, |
| 12754 | phex_nz (loc->address, 0)); |
| 12755 | putpkt (rs->buf); |
| 12756 | reply = remote_get_noisy_reply (); |
| 12757 | if (reply && *reply) |
| 12758 | { |
| 12759 | if (*reply == 'V') |
| 12760 | parse_tracepoint_status (reply + 1, bp, utp); |
| 12761 | } |
| 12762 | } |
| 12763 | } |
| 12764 | else if (utp) |
| 12765 | { |
| 12766 | utp->hit_count = 0; |
| 12767 | utp->traceframe_usage = 0; |
| 12768 | xsnprintf (rs->buf, size, "qTP:%x:%s", utp->number, |
| 12769 | phex_nz (utp->addr, 0)); |
| 12770 | putpkt (rs->buf); |
| 12771 | reply = remote_get_noisy_reply (); |
| 12772 | if (reply && *reply) |
| 12773 | { |
| 12774 | if (*reply == 'V') |
| 12775 | parse_tracepoint_status (reply + 1, bp, utp); |
| 12776 | } |
| 12777 | } |
| 12778 | } |
| 12779 | |
| 12780 | static void |
| 12781 | remote_trace_stop (struct target_ops *self) |
| 12782 | { |
| 12783 | struct remote_state *rs = get_remote_state (); |
| 12784 | |
| 12785 | putpkt ("QTStop"); |
| 12786 | remote_get_noisy_reply (); |
| 12787 | if (*rs->buf == '\0') |
| 12788 | error (_("Target does not support this command.")); |
| 12789 | if (strcmp (rs->buf, "OK") != 0) |
| 12790 | error (_("Bogus reply from target: %s"), rs->buf); |
| 12791 | } |
| 12792 | |
| 12793 | static int |
| 12794 | remote_trace_find (struct target_ops *self, |
| 12795 | enum trace_find_type type, int num, |
| 12796 | CORE_ADDR addr1, CORE_ADDR addr2, |
| 12797 | int *tpp) |
| 12798 | { |
| 12799 | struct remote_state *rs = get_remote_state (); |
| 12800 | char *endbuf = rs->buf + get_remote_packet_size (); |
| 12801 | char *p, *reply; |
| 12802 | int target_frameno = -1, target_tracept = -1; |
| 12803 | |
| 12804 | /* Lookups other than by absolute frame number depend on the current |
| 12805 | trace selected, so make sure it is correct on the remote end |
| 12806 | first. */ |
| 12807 | if (type != tfind_number) |
| 12808 | set_remote_traceframe (); |
| 12809 | |
| 12810 | p = rs->buf; |
| 12811 | strcpy (p, "QTFrame:"); |
| 12812 | p = strchr (p, '\0'); |
| 12813 | switch (type) |
| 12814 | { |
| 12815 | case tfind_number: |
| 12816 | xsnprintf (p, endbuf - p, "%x", num); |
| 12817 | break; |
| 12818 | case tfind_pc: |
| 12819 | xsnprintf (p, endbuf - p, "pc:%s", phex_nz (addr1, 0)); |
| 12820 | break; |
| 12821 | case tfind_tp: |
| 12822 | xsnprintf (p, endbuf - p, "tdp:%x", num); |
| 12823 | break; |
| 12824 | case tfind_range: |
| 12825 | xsnprintf (p, endbuf - p, "range:%s:%s", phex_nz (addr1, 0), |
| 12826 | phex_nz (addr2, 0)); |
| 12827 | break; |
| 12828 | case tfind_outside: |
| 12829 | xsnprintf (p, endbuf - p, "outside:%s:%s", phex_nz (addr1, 0), |
| 12830 | phex_nz (addr2, 0)); |
| 12831 | break; |
| 12832 | default: |
| 12833 | error (_("Unknown trace find type %d"), type); |
| 12834 | } |
| 12835 | |
| 12836 | putpkt (rs->buf); |
| 12837 | reply = remote_get_noisy_reply (); |
| 12838 | if (*reply == '\0') |
| 12839 | error (_("Target does not support this command.")); |
| 12840 | |
| 12841 | while (reply && *reply) |
| 12842 | switch (*reply) |
| 12843 | { |
| 12844 | case 'F': |
| 12845 | p = ++reply; |
| 12846 | target_frameno = (int) strtol (p, &reply, 16); |
| 12847 | if (reply == p) |
| 12848 | error (_("Unable to parse trace frame number")); |
| 12849 | /* Don't update our remote traceframe number cache on failure |
| 12850 | to select a remote traceframe. */ |
| 12851 | if (target_frameno == -1) |
| 12852 | return -1; |
| 12853 | break; |
| 12854 | case 'T': |
| 12855 | p = ++reply; |
| 12856 | target_tracept = (int) strtol (p, &reply, 16); |
| 12857 | if (reply == p) |
| 12858 | error (_("Unable to parse tracepoint number")); |
| 12859 | break; |
| 12860 | case 'O': /* "OK"? */ |
| 12861 | if (reply[1] == 'K' && reply[2] == '\0') |
| 12862 | reply += 2; |
| 12863 | else |
| 12864 | error (_("Bogus reply from target: %s"), reply); |
| 12865 | break; |
| 12866 | default: |
| 12867 | error (_("Bogus reply from target: %s"), reply); |
| 12868 | } |
| 12869 | if (tpp) |
| 12870 | *tpp = target_tracept; |
| 12871 | |
| 12872 | rs->remote_traceframe_number = target_frameno; |
| 12873 | return target_frameno; |
| 12874 | } |
| 12875 | |
| 12876 | static int |
| 12877 | remote_get_trace_state_variable_value (struct target_ops *self, |
| 12878 | int tsvnum, LONGEST *val) |
| 12879 | { |
| 12880 | struct remote_state *rs = get_remote_state (); |
| 12881 | char *reply; |
| 12882 | ULONGEST uval; |
| 12883 | |
| 12884 | set_remote_traceframe (); |
| 12885 | |
| 12886 | xsnprintf (rs->buf, get_remote_packet_size (), "qTV:%x", tsvnum); |
| 12887 | putpkt (rs->buf); |
| 12888 | reply = remote_get_noisy_reply (); |
| 12889 | if (reply && *reply) |
| 12890 | { |
| 12891 | if (*reply == 'V') |
| 12892 | { |
| 12893 | unpack_varlen_hex (reply + 1, &uval); |
| 12894 | *val = (LONGEST) uval; |
| 12895 | return 1; |
| 12896 | } |
| 12897 | } |
| 12898 | return 0; |
| 12899 | } |
| 12900 | |
| 12901 | static int |
| 12902 | remote_save_trace_data (struct target_ops *self, const char *filename) |
| 12903 | { |
| 12904 | struct remote_state *rs = get_remote_state (); |
| 12905 | char *p, *reply; |
| 12906 | |
| 12907 | p = rs->buf; |
| 12908 | strcpy (p, "QTSave:"); |
| 12909 | p += strlen (p); |
| 12910 | if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ()) |
| 12911 | error (_("Remote file name too long for trace save packet")); |
| 12912 | p += 2 * bin2hex ((gdb_byte *) filename, p, strlen (filename)); |
| 12913 | *p++ = '\0'; |
| 12914 | putpkt (rs->buf); |
| 12915 | reply = remote_get_noisy_reply (); |
| 12916 | if (*reply == '\0') |
| 12917 | error (_("Target does not support this command.")); |
| 12918 | if (strcmp (reply, "OK") != 0) |
| 12919 | error (_("Bogus reply from target: %s"), reply); |
| 12920 | return 0; |
| 12921 | } |
| 12922 | |
| 12923 | /* This is basically a memory transfer, but needs to be its own packet |
| 12924 | because we don't know how the target actually organizes its trace |
| 12925 | memory, plus we want to be able to ask for as much as possible, but |
| 12926 | not be unhappy if we don't get as much as we ask for. */ |
| 12927 | |
| 12928 | static LONGEST |
| 12929 | remote_get_raw_trace_data (struct target_ops *self, |
| 12930 | gdb_byte *buf, ULONGEST offset, LONGEST len) |
| 12931 | { |
| 12932 | struct remote_state *rs = get_remote_state (); |
| 12933 | char *reply; |
| 12934 | char *p; |
| 12935 | int rslt; |
| 12936 | |
| 12937 | p = rs->buf; |
| 12938 | strcpy (p, "qTBuffer:"); |
| 12939 | p += strlen (p); |
| 12940 | p += hexnumstr (p, offset); |
| 12941 | *p++ = ','; |
| 12942 | p += hexnumstr (p, len); |
| 12943 | *p++ = '\0'; |
| 12944 | |
| 12945 | putpkt (rs->buf); |
| 12946 | reply = remote_get_noisy_reply (); |
| 12947 | if (reply && *reply) |
| 12948 | { |
| 12949 | /* 'l' by itself means we're at the end of the buffer and |
| 12950 | there is nothing more to get. */ |
| 12951 | if (*reply == 'l') |
| 12952 | return 0; |
| 12953 | |
| 12954 | /* Convert the reply into binary. Limit the number of bytes to |
| 12955 | convert according to our passed-in buffer size, rather than |
| 12956 | what was returned in the packet; if the target is |
| 12957 | unexpectedly generous and gives us a bigger reply than we |
| 12958 | asked for, we don't want to crash. */ |
| 12959 | rslt = hex2bin (reply, buf, len); |
| 12960 | return rslt; |
| 12961 | } |
| 12962 | |
| 12963 | /* Something went wrong, flag as an error. */ |
| 12964 | return -1; |
| 12965 | } |
| 12966 | |
| 12967 | static void |
| 12968 | remote_set_disconnected_tracing (struct target_ops *self, int val) |
| 12969 | { |
| 12970 | struct remote_state *rs = get_remote_state (); |
| 12971 | |
| 12972 | if (packet_support (PACKET_DisconnectedTracing_feature) == PACKET_ENABLE) |
| 12973 | { |
| 12974 | char *reply; |
| 12975 | |
| 12976 | xsnprintf (rs->buf, get_remote_packet_size (), "QTDisconnected:%x", val); |
| 12977 | putpkt (rs->buf); |
| 12978 | reply = remote_get_noisy_reply (); |
| 12979 | if (*reply == '\0') |
| 12980 | error (_("Target does not support this command.")); |
| 12981 | if (strcmp (reply, "OK") != 0) |
| 12982 | error (_("Bogus reply from target: %s"), reply); |
| 12983 | } |
| 12984 | else if (val) |
| 12985 | warning (_("Target does not support disconnected tracing.")); |
| 12986 | } |
| 12987 | |
| 12988 | static int |
| 12989 | remote_core_of_thread (struct target_ops *ops, ptid_t ptid) |
| 12990 | { |
| 12991 | struct thread_info *info = find_thread_ptid (ptid); |
| 12992 | |
| 12993 | if (info && info->priv) |
| 12994 | return info->priv->core; |
| 12995 | return -1; |
| 12996 | } |
| 12997 | |
| 12998 | static void |
| 12999 | remote_set_circular_trace_buffer (struct target_ops *self, int val) |
| 13000 | { |
| 13001 | struct remote_state *rs = get_remote_state (); |
| 13002 | char *reply; |
| 13003 | |
| 13004 | xsnprintf (rs->buf, get_remote_packet_size (), "QTBuffer:circular:%x", val); |
| 13005 | putpkt (rs->buf); |
| 13006 | reply = remote_get_noisy_reply (); |
| 13007 | if (*reply == '\0') |
| 13008 | error (_("Target does not support this command.")); |
| 13009 | if (strcmp (reply, "OK") != 0) |
| 13010 | error (_("Bogus reply from target: %s"), reply); |
| 13011 | } |
| 13012 | |
| 13013 | static traceframe_info_up |
| 13014 | remote_traceframe_info (struct target_ops *self) |
| 13015 | { |
| 13016 | gdb::unique_xmalloc_ptr<char> text |
| 13017 | = target_read_stralloc (¤t_target, TARGET_OBJECT_TRACEFRAME_INFO, |
| 13018 | NULL); |
| 13019 | if (text != NULL) |
| 13020 | return parse_traceframe_info (text.get ()); |
| 13021 | |
| 13022 | return NULL; |
| 13023 | } |
| 13024 | |
| 13025 | /* Handle the qTMinFTPILen packet. Returns the minimum length of |
| 13026 | instruction on which a fast tracepoint may be placed. Returns -1 |
| 13027 | if the packet is not supported, and 0 if the minimum instruction |
| 13028 | length is unknown. */ |
| 13029 | |
| 13030 | static int |
| 13031 | remote_get_min_fast_tracepoint_insn_len (struct target_ops *self) |
| 13032 | { |
| 13033 | struct remote_state *rs = get_remote_state (); |
| 13034 | char *reply; |
| 13035 | |
| 13036 | /* If we're not debugging a process yet, the IPA can't be |
| 13037 | loaded. */ |
| 13038 | if (!target_has_execution) |
| 13039 | return 0; |
| 13040 | |
| 13041 | /* Make sure the remote is pointing at the right process. */ |
| 13042 | set_general_process (); |
| 13043 | |
| 13044 | xsnprintf (rs->buf, get_remote_packet_size (), "qTMinFTPILen"); |
| 13045 | putpkt (rs->buf); |
| 13046 | reply = remote_get_noisy_reply (); |
| 13047 | if (*reply == '\0') |
| 13048 | return -1; |
| 13049 | else |
| 13050 | { |
| 13051 | ULONGEST min_insn_len; |
| 13052 | |
| 13053 | unpack_varlen_hex (reply, &min_insn_len); |
| 13054 | |
| 13055 | return (int) min_insn_len; |
| 13056 | } |
| 13057 | } |
| 13058 | |
| 13059 | static void |
| 13060 | remote_set_trace_buffer_size (struct target_ops *self, LONGEST val) |
| 13061 | { |
| 13062 | if (packet_support (PACKET_QTBuffer_size) != PACKET_DISABLE) |
| 13063 | { |
| 13064 | struct remote_state *rs = get_remote_state (); |
| 13065 | char *buf = rs->buf; |
| 13066 | char *endbuf = rs->buf + get_remote_packet_size (); |
| 13067 | enum packet_result result; |
| 13068 | |
| 13069 | gdb_assert (val >= 0 || val == -1); |
| 13070 | buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:"); |
| 13071 | /* Send -1 as literal "-1" to avoid host size dependency. */ |
| 13072 | if (val < 0) |
| 13073 | { |
| 13074 | *buf++ = '-'; |
| 13075 | buf += hexnumstr (buf, (ULONGEST) -val); |
| 13076 | } |
| 13077 | else |
| 13078 | buf += hexnumstr (buf, (ULONGEST) val); |
| 13079 | |
| 13080 | putpkt (rs->buf); |
| 13081 | remote_get_noisy_reply (); |
| 13082 | result = packet_ok (rs->buf, |
| 13083 | &remote_protocol_packets[PACKET_QTBuffer_size]); |
| 13084 | |
| 13085 | if (result != PACKET_OK) |
| 13086 | warning (_("Bogus reply from target: %s"), rs->buf); |
| 13087 | } |
| 13088 | } |
| 13089 | |
| 13090 | static int |
| 13091 | remote_set_trace_notes (struct target_ops *self, |
| 13092 | const char *user, const char *notes, |
| 13093 | const char *stop_notes) |
| 13094 | { |
| 13095 | struct remote_state *rs = get_remote_state (); |
| 13096 | char *reply; |
| 13097 | char *buf = rs->buf; |
| 13098 | char *endbuf = rs->buf + get_remote_packet_size (); |
| 13099 | int nbytes; |
| 13100 | |
| 13101 | buf += xsnprintf (buf, endbuf - buf, "QTNotes:"); |
| 13102 | if (user) |
| 13103 | { |
| 13104 | buf += xsnprintf (buf, endbuf - buf, "user:"); |
| 13105 | nbytes = bin2hex ((gdb_byte *) user, buf, strlen (user)); |
| 13106 | buf += 2 * nbytes; |
| 13107 | *buf++ = ';'; |
| 13108 | } |
| 13109 | if (notes) |
| 13110 | { |
| 13111 | buf += xsnprintf (buf, endbuf - buf, "notes:"); |
| 13112 | nbytes = bin2hex ((gdb_byte *) notes, buf, strlen (notes)); |
| 13113 | buf += 2 * nbytes; |
| 13114 | *buf++ = ';'; |
| 13115 | } |
| 13116 | if (stop_notes) |
| 13117 | { |
| 13118 | buf += xsnprintf (buf, endbuf - buf, "tstop:"); |
| 13119 | nbytes = bin2hex ((gdb_byte *) stop_notes, buf, strlen (stop_notes)); |
| 13120 | buf += 2 * nbytes; |
| 13121 | *buf++ = ';'; |
| 13122 | } |
| 13123 | /* Ensure the buffer is terminated. */ |
| 13124 | *buf = '\0'; |
| 13125 | |
| 13126 | putpkt (rs->buf); |
| 13127 | reply = remote_get_noisy_reply (); |
| 13128 | if (*reply == '\0') |
| 13129 | return 0; |
| 13130 | |
| 13131 | if (strcmp (reply, "OK") != 0) |
| 13132 | error (_("Bogus reply from target: %s"), reply); |
| 13133 | |
| 13134 | return 1; |
| 13135 | } |
| 13136 | |
| 13137 | static int |
| 13138 | remote_use_agent (struct target_ops *self, int use) |
| 13139 | { |
| 13140 | if (packet_support (PACKET_QAgent) != PACKET_DISABLE) |
| 13141 | { |
| 13142 | struct remote_state *rs = get_remote_state (); |
| 13143 | |
| 13144 | /* If the stub supports QAgent. */ |
| 13145 | xsnprintf (rs->buf, get_remote_packet_size (), "QAgent:%d", use); |
| 13146 | putpkt (rs->buf); |
| 13147 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 13148 | |
| 13149 | if (strcmp (rs->buf, "OK") == 0) |
| 13150 | { |
| 13151 | use_agent = use; |
| 13152 | return 1; |
| 13153 | } |
| 13154 | } |
| 13155 | |
| 13156 | return 0; |
| 13157 | } |
| 13158 | |
| 13159 | static int |
| 13160 | remote_can_use_agent (struct target_ops *self) |
| 13161 | { |
| 13162 | return (packet_support (PACKET_QAgent) != PACKET_DISABLE); |
| 13163 | } |
| 13164 | |
| 13165 | struct btrace_target_info |
| 13166 | { |
| 13167 | /* The ptid of the traced thread. */ |
| 13168 | ptid_t ptid; |
| 13169 | |
| 13170 | /* The obtained branch trace configuration. */ |
| 13171 | struct btrace_config conf; |
| 13172 | }; |
| 13173 | |
| 13174 | /* Reset our idea of our target's btrace configuration. */ |
| 13175 | |
| 13176 | static void |
| 13177 | remote_btrace_reset (void) |
| 13178 | { |
| 13179 | struct remote_state *rs = get_remote_state (); |
| 13180 | |
| 13181 | memset (&rs->btrace_config, 0, sizeof (rs->btrace_config)); |
| 13182 | } |
| 13183 | |
| 13184 | /* Check whether the target supports branch tracing. */ |
| 13185 | |
| 13186 | static int |
| 13187 | remote_supports_btrace (struct target_ops *self, enum btrace_format format) |
| 13188 | { |
| 13189 | if (packet_support (PACKET_Qbtrace_off) != PACKET_ENABLE) |
| 13190 | return 0; |
| 13191 | if (packet_support (PACKET_qXfer_btrace) != PACKET_ENABLE) |
| 13192 | return 0; |
| 13193 | |
| 13194 | switch (format) |
| 13195 | { |
| 13196 | case BTRACE_FORMAT_NONE: |
| 13197 | return 0; |
| 13198 | |
| 13199 | case BTRACE_FORMAT_BTS: |
| 13200 | return (packet_support (PACKET_Qbtrace_bts) == PACKET_ENABLE); |
| 13201 | |
| 13202 | case BTRACE_FORMAT_PT: |
| 13203 | /* The trace is decoded on the host. Even if our target supports it, |
| 13204 | we still need to have libipt to decode the trace. */ |
| 13205 | #if defined (HAVE_LIBIPT) |
| 13206 | return (packet_support (PACKET_Qbtrace_pt) == PACKET_ENABLE); |
| 13207 | #else /* !defined (HAVE_LIBIPT) */ |
| 13208 | return 0; |
| 13209 | #endif /* !defined (HAVE_LIBIPT) */ |
| 13210 | } |
| 13211 | |
| 13212 | internal_error (__FILE__, __LINE__, _("Unknown branch trace format")); |
| 13213 | } |
| 13214 | |
| 13215 | /* Synchronize the configuration with the target. */ |
| 13216 | |
| 13217 | static void |
| 13218 | btrace_sync_conf (const struct btrace_config *conf) |
| 13219 | { |
| 13220 | struct packet_config *packet; |
| 13221 | struct remote_state *rs; |
| 13222 | char *buf, *pos, *endbuf; |
| 13223 | |
| 13224 | rs = get_remote_state (); |
| 13225 | buf = rs->buf; |
| 13226 | endbuf = buf + get_remote_packet_size (); |
| 13227 | |
| 13228 | packet = &remote_protocol_packets[PACKET_Qbtrace_conf_bts_size]; |
| 13229 | if (packet_config_support (packet) == PACKET_ENABLE |
| 13230 | && conf->bts.size != rs->btrace_config.bts.size) |
| 13231 | { |
| 13232 | pos = buf; |
| 13233 | pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name, |
| 13234 | conf->bts.size); |
| 13235 | |
| 13236 | putpkt (buf); |
| 13237 | getpkt (&buf, &rs->buf_size, 0); |
| 13238 | |
| 13239 | if (packet_ok (buf, packet) == PACKET_ERROR) |
| 13240 | { |
| 13241 | if (buf[0] == 'E' && buf[1] == '.') |
| 13242 | error (_("Failed to configure the BTS buffer size: %s"), buf + 2); |
| 13243 | else |
| 13244 | error (_("Failed to configure the BTS buffer size.")); |
| 13245 | } |
| 13246 | |
| 13247 | rs->btrace_config.bts.size = conf->bts.size; |
| 13248 | } |
| 13249 | |
| 13250 | packet = &remote_protocol_packets[PACKET_Qbtrace_conf_pt_size]; |
| 13251 | if (packet_config_support (packet) == PACKET_ENABLE |
| 13252 | && conf->pt.size != rs->btrace_config.pt.size) |
| 13253 | { |
| 13254 | pos = buf; |
| 13255 | pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name, |
| 13256 | conf->pt.size); |
| 13257 | |
| 13258 | putpkt (buf); |
| 13259 | getpkt (&buf, &rs->buf_size, 0); |
| 13260 | |
| 13261 | if (packet_ok (buf, packet) == PACKET_ERROR) |
| 13262 | { |
| 13263 | if (buf[0] == 'E' && buf[1] == '.') |
| 13264 | error (_("Failed to configure the trace buffer size: %s"), buf + 2); |
| 13265 | else |
| 13266 | error (_("Failed to configure the trace buffer size.")); |
| 13267 | } |
| 13268 | |
| 13269 | rs->btrace_config.pt.size = conf->pt.size; |
| 13270 | } |
| 13271 | } |
| 13272 | |
| 13273 | /* Read the current thread's btrace configuration from the target and |
| 13274 | store it into CONF. */ |
| 13275 | |
| 13276 | static void |
| 13277 | btrace_read_config (struct btrace_config *conf) |
| 13278 | { |
| 13279 | gdb::unique_xmalloc_ptr<char> xml |
| 13280 | = target_read_stralloc (¤t_target, TARGET_OBJECT_BTRACE_CONF, ""); |
| 13281 | if (xml != NULL) |
| 13282 | parse_xml_btrace_conf (conf, xml.get ()); |
| 13283 | } |
| 13284 | |
| 13285 | /* Maybe reopen target btrace. */ |
| 13286 | |
| 13287 | static void |
| 13288 | remote_btrace_maybe_reopen (void) |
| 13289 | { |
| 13290 | struct remote_state *rs = get_remote_state (); |
| 13291 | struct thread_info *tp; |
| 13292 | int btrace_target_pushed = 0; |
| 13293 | int warned = 0; |
| 13294 | |
| 13295 | scoped_restore_current_thread restore_thread; |
| 13296 | |
| 13297 | ALL_NON_EXITED_THREADS (tp) |
| 13298 | { |
| 13299 | set_general_thread (tp->ptid); |
| 13300 | |
| 13301 | memset (&rs->btrace_config, 0x00, sizeof (struct btrace_config)); |
| 13302 | btrace_read_config (&rs->btrace_config); |
| 13303 | |
| 13304 | if (rs->btrace_config.format == BTRACE_FORMAT_NONE) |
| 13305 | continue; |
| 13306 | |
| 13307 | #if !defined (HAVE_LIBIPT) |
| 13308 | if (rs->btrace_config.format == BTRACE_FORMAT_PT) |
| 13309 | { |
| 13310 | if (!warned) |
| 13311 | { |
| 13312 | warned = 1; |
| 13313 | warning (_("GDB does not support Intel Processor Trace. " |
| 13314 | "\"record\" will not work in this session.")); |
| 13315 | } |
| 13316 | |
| 13317 | continue; |
| 13318 | } |
| 13319 | #endif /* !defined (HAVE_LIBIPT) */ |
| 13320 | |
| 13321 | /* Push target, once, but before anything else happens. This way our |
| 13322 | changes to the threads will be cleaned up by unpushing the target |
| 13323 | in case btrace_read_config () throws. */ |
| 13324 | if (!btrace_target_pushed) |
| 13325 | { |
| 13326 | btrace_target_pushed = 1; |
| 13327 | record_btrace_push_target (); |
| 13328 | printf_filtered (_("Target is recording using %s.\n"), |
| 13329 | btrace_format_string (rs->btrace_config.format)); |
| 13330 | } |
| 13331 | |
| 13332 | tp->btrace.target = XCNEW (struct btrace_target_info); |
| 13333 | tp->btrace.target->ptid = tp->ptid; |
| 13334 | tp->btrace.target->conf = rs->btrace_config; |
| 13335 | } |
| 13336 | } |
| 13337 | |
| 13338 | /* Enable branch tracing. */ |
| 13339 | |
| 13340 | static struct btrace_target_info * |
| 13341 | remote_enable_btrace (struct target_ops *self, ptid_t ptid, |
| 13342 | const struct btrace_config *conf) |
| 13343 | { |
| 13344 | struct btrace_target_info *tinfo = NULL; |
| 13345 | struct packet_config *packet = NULL; |
| 13346 | struct remote_state *rs = get_remote_state (); |
| 13347 | char *buf = rs->buf; |
| 13348 | char *endbuf = rs->buf + get_remote_packet_size (); |
| 13349 | |
| 13350 | switch (conf->format) |
| 13351 | { |
| 13352 | case BTRACE_FORMAT_BTS: |
| 13353 | packet = &remote_protocol_packets[PACKET_Qbtrace_bts]; |
| 13354 | break; |
| 13355 | |
| 13356 | case BTRACE_FORMAT_PT: |
| 13357 | packet = &remote_protocol_packets[PACKET_Qbtrace_pt]; |
| 13358 | break; |
| 13359 | } |
| 13360 | |
| 13361 | if (packet == NULL || packet_config_support (packet) != PACKET_ENABLE) |
| 13362 | error (_("Target does not support branch tracing.")); |
| 13363 | |
| 13364 | btrace_sync_conf (conf); |
| 13365 | |
| 13366 | set_general_thread (ptid); |
| 13367 | |
| 13368 | buf += xsnprintf (buf, endbuf - buf, "%s", packet->name); |
| 13369 | putpkt (rs->buf); |
| 13370 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 13371 | |
| 13372 | if (packet_ok (rs->buf, packet) == PACKET_ERROR) |
| 13373 | { |
| 13374 | if (rs->buf[0] == 'E' && rs->buf[1] == '.') |
| 13375 | error (_("Could not enable branch tracing for %s: %s"), |
| 13376 | target_pid_to_str (ptid), rs->buf + 2); |
| 13377 | else |
| 13378 | error (_("Could not enable branch tracing for %s."), |
| 13379 | target_pid_to_str (ptid)); |
| 13380 | } |
| 13381 | |
| 13382 | tinfo = XCNEW (struct btrace_target_info); |
| 13383 | tinfo->ptid = ptid; |
| 13384 | |
| 13385 | /* If we fail to read the configuration, we lose some information, but the |
| 13386 | tracing itself is not impacted. */ |
| 13387 | TRY |
| 13388 | { |
| 13389 | btrace_read_config (&tinfo->conf); |
| 13390 | } |
| 13391 | CATCH (err, RETURN_MASK_ERROR) |
| 13392 | { |
| 13393 | if (err.message != NULL) |
| 13394 | warning ("%s", err.message); |
| 13395 | } |
| 13396 | END_CATCH |
| 13397 | |
| 13398 | return tinfo; |
| 13399 | } |
| 13400 | |
| 13401 | /* Disable branch tracing. */ |
| 13402 | |
| 13403 | static void |
| 13404 | remote_disable_btrace (struct target_ops *self, |
| 13405 | struct btrace_target_info *tinfo) |
| 13406 | { |
| 13407 | struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_off]; |
| 13408 | struct remote_state *rs = get_remote_state (); |
| 13409 | char *buf = rs->buf; |
| 13410 | char *endbuf = rs->buf + get_remote_packet_size (); |
| 13411 | |
| 13412 | if (packet_config_support (packet) != PACKET_ENABLE) |
| 13413 | error (_("Target does not support branch tracing.")); |
| 13414 | |
| 13415 | set_general_thread (tinfo->ptid); |
| 13416 | |
| 13417 | buf += xsnprintf (buf, endbuf - buf, "%s", packet->name); |
| 13418 | putpkt (rs->buf); |
| 13419 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 13420 | |
| 13421 | if (packet_ok (rs->buf, packet) == PACKET_ERROR) |
| 13422 | { |
| 13423 | if (rs->buf[0] == 'E' && rs->buf[1] == '.') |
| 13424 | error (_("Could not disable branch tracing for %s: %s"), |
| 13425 | target_pid_to_str (tinfo->ptid), rs->buf + 2); |
| 13426 | else |
| 13427 | error (_("Could not disable branch tracing for %s."), |
| 13428 | target_pid_to_str (tinfo->ptid)); |
| 13429 | } |
| 13430 | |
| 13431 | xfree (tinfo); |
| 13432 | } |
| 13433 | |
| 13434 | /* Teardown branch tracing. */ |
| 13435 | |
| 13436 | static void |
| 13437 | remote_teardown_btrace (struct target_ops *self, |
| 13438 | struct btrace_target_info *tinfo) |
| 13439 | { |
| 13440 | /* We must not talk to the target during teardown. */ |
| 13441 | xfree (tinfo); |
| 13442 | } |
| 13443 | |
| 13444 | /* Read the branch trace. */ |
| 13445 | |
| 13446 | static enum btrace_error |
| 13447 | remote_read_btrace (struct target_ops *self, |
| 13448 | struct btrace_data *btrace, |
| 13449 | struct btrace_target_info *tinfo, |
| 13450 | enum btrace_read_type type) |
| 13451 | { |
| 13452 | struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace]; |
| 13453 | const char *annex; |
| 13454 | |
| 13455 | if (packet_config_support (packet) != PACKET_ENABLE) |
| 13456 | error (_("Target does not support branch tracing.")); |
| 13457 | |
| 13458 | #if !defined(HAVE_LIBEXPAT) |
| 13459 | error (_("Cannot process branch tracing result. XML parsing not supported.")); |
| 13460 | #endif |
| 13461 | |
| 13462 | switch (type) |
| 13463 | { |
| 13464 | case BTRACE_READ_ALL: |
| 13465 | annex = "all"; |
| 13466 | break; |
| 13467 | case BTRACE_READ_NEW: |
| 13468 | annex = "new"; |
| 13469 | break; |
| 13470 | case BTRACE_READ_DELTA: |
| 13471 | annex = "delta"; |
| 13472 | break; |
| 13473 | default: |
| 13474 | internal_error (__FILE__, __LINE__, |
| 13475 | _("Bad branch tracing read type: %u."), |
| 13476 | (unsigned int) type); |
| 13477 | } |
| 13478 | |
| 13479 | gdb::unique_xmalloc_ptr<char> xml |
| 13480 | = target_read_stralloc (¤t_target, TARGET_OBJECT_BTRACE, annex); |
| 13481 | if (xml == NULL) |
| 13482 | return BTRACE_ERR_UNKNOWN; |
| 13483 | |
| 13484 | parse_xml_btrace (btrace, xml.get ()); |
| 13485 | |
| 13486 | return BTRACE_ERR_NONE; |
| 13487 | } |
| 13488 | |
| 13489 | static const struct btrace_config * |
| 13490 | remote_btrace_conf (struct target_ops *self, |
| 13491 | const struct btrace_target_info *tinfo) |
| 13492 | { |
| 13493 | return &tinfo->conf; |
| 13494 | } |
| 13495 | |
| 13496 | static int |
| 13497 | remote_augmented_libraries_svr4_read (struct target_ops *self) |
| 13498 | { |
| 13499 | return (packet_support (PACKET_augmented_libraries_svr4_read_feature) |
| 13500 | == PACKET_ENABLE); |
| 13501 | } |
| 13502 | |
| 13503 | /* Implementation of to_load. */ |
| 13504 | |
| 13505 | static void |
| 13506 | remote_load (struct target_ops *self, const char *name, int from_tty) |
| 13507 | { |
| 13508 | generic_load (name, from_tty); |
| 13509 | } |
| 13510 | |
| 13511 | /* Accepts an integer PID; returns a string representing a file that |
| 13512 | can be opened on the remote side to get the symbols for the child |
| 13513 | process. Returns NULL if the operation is not supported. */ |
| 13514 | |
| 13515 | static char * |
| 13516 | remote_pid_to_exec_file (struct target_ops *self, int pid) |
| 13517 | { |
| 13518 | static gdb::unique_xmalloc_ptr<char> filename; |
| 13519 | struct inferior *inf; |
| 13520 | char *annex = NULL; |
| 13521 | |
| 13522 | if (packet_support (PACKET_qXfer_exec_file) != PACKET_ENABLE) |
| 13523 | return NULL; |
| 13524 | |
| 13525 | inf = find_inferior_pid (pid); |
| 13526 | if (inf == NULL) |
| 13527 | internal_error (__FILE__, __LINE__, |
| 13528 | _("not currently attached to process %d"), pid); |
| 13529 | |
| 13530 | if (!inf->fake_pid_p) |
| 13531 | { |
| 13532 | const int annex_size = 9; |
| 13533 | |
| 13534 | annex = (char *) alloca (annex_size); |
| 13535 | xsnprintf (annex, annex_size, "%x", pid); |
| 13536 | } |
| 13537 | |
| 13538 | filename = target_read_stralloc (¤t_target, |
| 13539 | TARGET_OBJECT_EXEC_FILE, annex); |
| 13540 | |
| 13541 | return filename.get (); |
| 13542 | } |
| 13543 | |
| 13544 | /* Implement the to_can_do_single_step target_ops method. */ |
| 13545 | |
| 13546 | static int |
| 13547 | remote_can_do_single_step (struct target_ops *ops) |
| 13548 | { |
| 13549 | /* We can only tell whether target supports single step or not by |
| 13550 | supported s and S vCont actions if the stub supports vContSupported |
| 13551 | feature. If the stub doesn't support vContSupported feature, |
| 13552 | we have conservatively to think target doesn't supports single |
| 13553 | step. */ |
| 13554 | if (packet_support (PACKET_vContSupported) == PACKET_ENABLE) |
| 13555 | { |
| 13556 | struct remote_state *rs = get_remote_state (); |
| 13557 | |
| 13558 | if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN) |
| 13559 | remote_vcont_probe (rs); |
| 13560 | |
| 13561 | return rs->supports_vCont.s && rs->supports_vCont.S; |
| 13562 | } |
| 13563 | else |
| 13564 | return 0; |
| 13565 | } |
| 13566 | |
| 13567 | /* Implementation of the to_execution_direction method for the remote |
| 13568 | target. */ |
| 13569 | |
| 13570 | static enum exec_direction_kind |
| 13571 | remote_execution_direction (struct target_ops *self) |
| 13572 | { |
| 13573 | struct remote_state *rs = get_remote_state (); |
| 13574 | |
| 13575 | return rs->last_resume_exec_dir; |
| 13576 | } |
| 13577 | |
| 13578 | /* Return pointer to the thread_info struct which corresponds to |
| 13579 | THREAD_HANDLE (having length HANDLE_LEN). */ |
| 13580 | |
| 13581 | static struct thread_info * |
| 13582 | remote_thread_handle_to_thread_info (struct target_ops *ops, |
| 13583 | const gdb_byte *thread_handle, |
| 13584 | int handle_len, |
| 13585 | struct inferior *inf) |
| 13586 | { |
| 13587 | struct thread_info *tp; |
| 13588 | |
| 13589 | ALL_NON_EXITED_THREADS (tp) |
| 13590 | { |
| 13591 | struct private_thread_info *priv = get_private_info_thread (tp); |
| 13592 | |
| 13593 | if (tp->inf == inf && priv != NULL) |
| 13594 | { |
| 13595 | if (handle_len != priv->thread_handle->size ()) |
| 13596 | error (_("Thread handle size mismatch: %d vs %zu (from remote)"), |
| 13597 | handle_len, priv->thread_handle->size ()); |
| 13598 | if (memcmp (thread_handle, priv->thread_handle->data (), |
| 13599 | handle_len) == 0) |
| 13600 | return tp; |
| 13601 | } |
| 13602 | } |
| 13603 | |
| 13604 | return NULL; |
| 13605 | } |
| 13606 | |
| 13607 | static void |
| 13608 | init_remote_ops (void) |
| 13609 | { |
| 13610 | remote_ops.to_shortname = "remote"; |
| 13611 | remote_ops.to_longname = "Remote serial target in gdb-specific protocol"; |
| 13612 | remote_ops.to_doc = |
| 13613 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ |
| 13614 | Specify the serial device it is connected to\n\ |
| 13615 | (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."; |
| 13616 | remote_ops.to_open = remote_open; |
| 13617 | remote_ops.to_close = remote_close; |
| 13618 | remote_ops.to_detach = remote_detach; |
| 13619 | remote_ops.to_disconnect = remote_disconnect; |
| 13620 | remote_ops.to_resume = remote_resume; |
| 13621 | remote_ops.to_commit_resume = remote_commit_resume; |
| 13622 | remote_ops.to_wait = remote_wait; |
| 13623 | remote_ops.to_fetch_registers = remote_fetch_registers; |
| 13624 | remote_ops.to_store_registers = remote_store_registers; |
| 13625 | remote_ops.to_prepare_to_store = remote_prepare_to_store; |
| 13626 | remote_ops.to_files_info = remote_files_info; |
| 13627 | remote_ops.to_insert_breakpoint = remote_insert_breakpoint; |
| 13628 | remote_ops.to_remove_breakpoint = remote_remove_breakpoint; |
| 13629 | remote_ops.to_stopped_by_sw_breakpoint = remote_stopped_by_sw_breakpoint; |
| 13630 | remote_ops.to_supports_stopped_by_sw_breakpoint = remote_supports_stopped_by_sw_breakpoint; |
| 13631 | remote_ops.to_stopped_by_hw_breakpoint = remote_stopped_by_hw_breakpoint; |
| 13632 | remote_ops.to_supports_stopped_by_hw_breakpoint = remote_supports_stopped_by_hw_breakpoint; |
| 13633 | remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint; |
| 13634 | remote_ops.to_stopped_data_address = remote_stopped_data_address; |
| 13635 | remote_ops.to_watchpoint_addr_within_range = |
| 13636 | remote_watchpoint_addr_within_range; |
| 13637 | remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources; |
| 13638 | remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint; |
| 13639 | remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint; |
| 13640 | remote_ops.to_region_ok_for_hw_watchpoint |
| 13641 | = remote_region_ok_for_hw_watchpoint; |
| 13642 | remote_ops.to_insert_watchpoint = remote_insert_watchpoint; |
| 13643 | remote_ops.to_remove_watchpoint = remote_remove_watchpoint; |
| 13644 | remote_ops.to_kill = remote_kill; |
| 13645 | remote_ops.to_load = remote_load; |
| 13646 | remote_ops.to_mourn_inferior = remote_mourn; |
| 13647 | remote_ops.to_pass_signals = remote_pass_signals; |
| 13648 | remote_ops.to_set_syscall_catchpoint = remote_set_syscall_catchpoint; |
| 13649 | remote_ops.to_program_signals = remote_program_signals; |
| 13650 | remote_ops.to_thread_alive = remote_thread_alive; |
| 13651 | remote_ops.to_thread_name = remote_thread_name; |
| 13652 | remote_ops.to_update_thread_list = remote_update_thread_list; |
| 13653 | remote_ops.to_pid_to_str = remote_pid_to_str; |
| 13654 | remote_ops.to_extra_thread_info = remote_threads_extra_info; |
| 13655 | remote_ops.to_get_ada_task_ptid = remote_get_ada_task_ptid; |
| 13656 | remote_ops.to_stop = remote_stop; |
| 13657 | remote_ops.to_interrupt = remote_interrupt; |
| 13658 | remote_ops.to_pass_ctrlc = remote_pass_ctrlc; |
| 13659 | remote_ops.to_xfer_partial = remote_xfer_partial; |
| 13660 | remote_ops.to_get_memory_xfer_limit = remote_get_memory_xfer_limit; |
| 13661 | remote_ops.to_rcmd = remote_rcmd; |
| 13662 | remote_ops.to_pid_to_exec_file = remote_pid_to_exec_file; |
| 13663 | remote_ops.to_log_command = serial_log_command; |
| 13664 | remote_ops.to_get_thread_local_address = remote_get_thread_local_address; |
| 13665 | remote_ops.to_stratum = process_stratum; |
| 13666 | remote_ops.to_has_all_memory = default_child_has_all_memory; |
| 13667 | remote_ops.to_has_memory = default_child_has_memory; |
| 13668 | remote_ops.to_has_stack = default_child_has_stack; |
| 13669 | remote_ops.to_has_registers = default_child_has_registers; |
| 13670 | remote_ops.to_has_execution = default_child_has_execution; |
| 13671 | remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ |
| 13672 | remote_ops.to_can_execute_reverse = remote_can_execute_reverse; |
| 13673 | remote_ops.to_magic = OPS_MAGIC; |
| 13674 | remote_ops.to_memory_map = remote_memory_map; |
| 13675 | remote_ops.to_flash_erase = remote_flash_erase; |
| 13676 | remote_ops.to_flash_done = remote_flash_done; |
| 13677 | remote_ops.to_read_description = remote_read_description; |
| 13678 | remote_ops.to_search_memory = remote_search_memory; |
| 13679 | remote_ops.to_can_async_p = remote_can_async_p; |
| 13680 | remote_ops.to_is_async_p = remote_is_async_p; |
| 13681 | remote_ops.to_async = remote_async; |
| 13682 | remote_ops.to_thread_events = remote_thread_events; |
| 13683 | remote_ops.to_can_do_single_step = remote_can_do_single_step; |
| 13684 | remote_ops.to_terminal_inferior = remote_terminal_inferior; |
| 13685 | remote_ops.to_terminal_ours = remote_terminal_ours; |
| 13686 | remote_ops.to_supports_non_stop = remote_supports_non_stop; |
| 13687 | remote_ops.to_supports_multi_process = remote_supports_multi_process; |
| 13688 | remote_ops.to_supports_disable_randomization |
| 13689 | = remote_supports_disable_randomization; |
| 13690 | remote_ops.to_filesystem_is_local = remote_filesystem_is_local; |
| 13691 | remote_ops.to_fileio_open = remote_hostio_open; |
| 13692 | remote_ops.to_fileio_pwrite = remote_hostio_pwrite; |
| 13693 | remote_ops.to_fileio_pread = remote_hostio_pread; |
| 13694 | remote_ops.to_fileio_fstat = remote_hostio_fstat; |
| 13695 | remote_ops.to_fileio_close = remote_hostio_close; |
| 13696 | remote_ops.to_fileio_unlink = remote_hostio_unlink; |
| 13697 | remote_ops.to_fileio_readlink = remote_hostio_readlink; |
| 13698 | remote_ops.to_supports_enable_disable_tracepoint = remote_supports_enable_disable_tracepoint; |
| 13699 | remote_ops.to_supports_string_tracing = remote_supports_string_tracing; |
| 13700 | remote_ops.to_supports_evaluation_of_breakpoint_conditions = remote_supports_cond_breakpoints; |
| 13701 | remote_ops.to_can_run_breakpoint_commands = remote_can_run_breakpoint_commands; |
| 13702 | remote_ops.to_trace_init = remote_trace_init; |
| 13703 | remote_ops.to_download_tracepoint = remote_download_tracepoint; |
| 13704 | remote_ops.to_can_download_tracepoint = remote_can_download_tracepoint; |
| 13705 | remote_ops.to_download_trace_state_variable |
| 13706 | = remote_download_trace_state_variable; |
| 13707 | remote_ops.to_enable_tracepoint = remote_enable_tracepoint; |
| 13708 | remote_ops.to_disable_tracepoint = remote_disable_tracepoint; |
| 13709 | remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions; |
| 13710 | remote_ops.to_trace_start = remote_trace_start; |
| 13711 | remote_ops.to_get_trace_status = remote_get_trace_status; |
| 13712 | remote_ops.to_get_tracepoint_status = remote_get_tracepoint_status; |
| 13713 | remote_ops.to_trace_stop = remote_trace_stop; |
| 13714 | remote_ops.to_trace_find = remote_trace_find; |
| 13715 | remote_ops.to_get_trace_state_variable_value |
| 13716 | = remote_get_trace_state_variable_value; |
| 13717 | remote_ops.to_save_trace_data = remote_save_trace_data; |
| 13718 | remote_ops.to_upload_tracepoints = remote_upload_tracepoints; |
| 13719 | remote_ops.to_upload_trace_state_variables |
| 13720 | = remote_upload_trace_state_variables; |
| 13721 | remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data; |
| 13722 | remote_ops.to_get_min_fast_tracepoint_insn_len = remote_get_min_fast_tracepoint_insn_len; |
| 13723 | remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing; |
| 13724 | remote_ops.to_set_circular_trace_buffer = remote_set_circular_trace_buffer; |
| 13725 | remote_ops.to_set_trace_buffer_size = remote_set_trace_buffer_size; |
| 13726 | remote_ops.to_set_trace_notes = remote_set_trace_notes; |
| 13727 | remote_ops.to_core_of_thread = remote_core_of_thread; |
| 13728 | remote_ops.to_verify_memory = remote_verify_memory; |
| 13729 | remote_ops.to_get_tib_address = remote_get_tib_address; |
| 13730 | remote_ops.to_set_permissions = remote_set_permissions; |
| 13731 | remote_ops.to_static_tracepoint_marker_at |
| 13732 | = remote_static_tracepoint_marker_at; |
| 13733 | remote_ops.to_static_tracepoint_markers_by_strid |
| 13734 | = remote_static_tracepoint_markers_by_strid; |
| 13735 | remote_ops.to_traceframe_info = remote_traceframe_info; |
| 13736 | remote_ops.to_use_agent = remote_use_agent; |
| 13737 | remote_ops.to_can_use_agent = remote_can_use_agent; |
| 13738 | remote_ops.to_supports_btrace = remote_supports_btrace; |
| 13739 | remote_ops.to_enable_btrace = remote_enable_btrace; |
| 13740 | remote_ops.to_disable_btrace = remote_disable_btrace; |
| 13741 | remote_ops.to_teardown_btrace = remote_teardown_btrace; |
| 13742 | remote_ops.to_read_btrace = remote_read_btrace; |
| 13743 | remote_ops.to_btrace_conf = remote_btrace_conf; |
| 13744 | remote_ops.to_augmented_libraries_svr4_read = |
| 13745 | remote_augmented_libraries_svr4_read; |
| 13746 | remote_ops.to_follow_fork = remote_follow_fork; |
| 13747 | remote_ops.to_follow_exec = remote_follow_exec; |
| 13748 | remote_ops.to_insert_fork_catchpoint = remote_insert_fork_catchpoint; |
| 13749 | remote_ops.to_remove_fork_catchpoint = remote_remove_fork_catchpoint; |
| 13750 | remote_ops.to_insert_vfork_catchpoint = remote_insert_vfork_catchpoint; |
| 13751 | remote_ops.to_remove_vfork_catchpoint = remote_remove_vfork_catchpoint; |
| 13752 | remote_ops.to_insert_exec_catchpoint = remote_insert_exec_catchpoint; |
| 13753 | remote_ops.to_remove_exec_catchpoint = remote_remove_exec_catchpoint; |
| 13754 | remote_ops.to_execution_direction = remote_execution_direction; |
| 13755 | remote_ops.to_thread_handle_to_thread_info = |
| 13756 | remote_thread_handle_to_thread_info; |
| 13757 | } |
| 13758 | |
| 13759 | /* Set up the extended remote vector by making a copy of the standard |
| 13760 | remote vector and adding to it. */ |
| 13761 | |
| 13762 | static void |
| 13763 | init_extended_remote_ops (void) |
| 13764 | { |
| 13765 | extended_remote_ops = remote_ops; |
| 13766 | |
| 13767 | extended_remote_ops.to_shortname = "extended-remote"; |
| 13768 | extended_remote_ops.to_longname = |
| 13769 | "Extended remote serial target in gdb-specific protocol"; |
| 13770 | extended_remote_ops.to_doc = |
| 13771 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ |
| 13772 | Specify the serial device it is connected to (e.g. /dev/ttya)."; |
| 13773 | extended_remote_ops.to_open = extended_remote_open; |
| 13774 | extended_remote_ops.to_create_inferior = extended_remote_create_inferior; |
| 13775 | extended_remote_ops.to_detach = extended_remote_detach; |
| 13776 | extended_remote_ops.to_attach = extended_remote_attach; |
| 13777 | extended_remote_ops.to_post_attach = extended_remote_post_attach; |
| 13778 | extended_remote_ops.to_supports_disable_randomization |
| 13779 | = extended_remote_supports_disable_randomization; |
| 13780 | } |
| 13781 | |
| 13782 | static int |
| 13783 | remote_can_async_p (struct target_ops *ops) |
| 13784 | { |
| 13785 | struct remote_state *rs = get_remote_state (); |
| 13786 | |
| 13787 | /* We don't go async if the user has explicitly prevented it with the |
| 13788 | "maint set target-async" command. */ |
| 13789 | if (!target_async_permitted) |
| 13790 | return 0; |
| 13791 | |
| 13792 | /* We're async whenever the serial device is. */ |
| 13793 | return serial_can_async_p (rs->remote_desc); |
| 13794 | } |
| 13795 | |
| 13796 | static int |
| 13797 | remote_is_async_p (struct target_ops *ops) |
| 13798 | { |
| 13799 | struct remote_state *rs = get_remote_state (); |
| 13800 | |
| 13801 | if (!target_async_permitted) |
| 13802 | /* We only enable async when the user specifically asks for it. */ |
| 13803 | return 0; |
| 13804 | |
| 13805 | /* We're async whenever the serial device is. */ |
| 13806 | return serial_is_async_p (rs->remote_desc); |
| 13807 | } |
| 13808 | |
| 13809 | /* Pass the SERIAL event on and up to the client. One day this code |
| 13810 | will be able to delay notifying the client of an event until the |
| 13811 | point where an entire packet has been received. */ |
| 13812 | |
| 13813 | static serial_event_ftype remote_async_serial_handler; |
| 13814 | |
| 13815 | static void |
| 13816 | remote_async_serial_handler (struct serial *scb, void *context) |
| 13817 | { |
| 13818 | /* Don't propogate error information up to the client. Instead let |
| 13819 | the client find out about the error by querying the target. */ |
| 13820 | inferior_event_handler (INF_REG_EVENT, NULL); |
| 13821 | } |
| 13822 | |
| 13823 | static void |
| 13824 | remote_async_inferior_event_handler (gdb_client_data data) |
| 13825 | { |
| 13826 | inferior_event_handler (INF_REG_EVENT, NULL); |
| 13827 | } |
| 13828 | |
| 13829 | static void |
| 13830 | remote_async (struct target_ops *ops, int enable) |
| 13831 | { |
| 13832 | struct remote_state *rs = get_remote_state (); |
| 13833 | |
| 13834 | if (enable) |
| 13835 | { |
| 13836 | serial_async (rs->remote_desc, remote_async_serial_handler, rs); |
| 13837 | |
| 13838 | /* If there are pending events in the stop reply queue tell the |
| 13839 | event loop to process them. */ |
| 13840 | if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue)) |
| 13841 | mark_async_event_handler (remote_async_inferior_event_token); |
| 13842 | /* For simplicity, below we clear the pending events token |
| 13843 | without remembering whether it is marked, so here we always |
| 13844 | mark it. If there's actually no pending notification to |
| 13845 | process, this ends up being a no-op (other than a spurious |
| 13846 | event-loop wakeup). */ |
| 13847 | if (target_is_non_stop_p ()) |
| 13848 | mark_async_event_handler (rs->notif_state->get_pending_events_token); |
| 13849 | } |
| 13850 | else |
| 13851 | { |
| 13852 | serial_async (rs->remote_desc, NULL, NULL); |
| 13853 | /* If the core is disabling async, it doesn't want to be |
| 13854 | disturbed with target events. Clear all async event sources |
| 13855 | too. */ |
| 13856 | clear_async_event_handler (remote_async_inferior_event_token); |
| 13857 | if (target_is_non_stop_p ()) |
| 13858 | clear_async_event_handler (rs->notif_state->get_pending_events_token); |
| 13859 | } |
| 13860 | } |
| 13861 | |
| 13862 | /* Implementation of the to_thread_events method. */ |
| 13863 | |
| 13864 | static void |
| 13865 | remote_thread_events (struct target_ops *ops, int enable) |
| 13866 | { |
| 13867 | struct remote_state *rs = get_remote_state (); |
| 13868 | size_t size = get_remote_packet_size (); |
| 13869 | |
| 13870 | if (packet_support (PACKET_QThreadEvents) == PACKET_DISABLE) |
| 13871 | return; |
| 13872 | |
| 13873 | xsnprintf (rs->buf, size, "QThreadEvents:%x", enable ? 1 : 0); |
| 13874 | putpkt (rs->buf); |
| 13875 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 13876 | |
| 13877 | switch (packet_ok (rs->buf, |
| 13878 | &remote_protocol_packets[PACKET_QThreadEvents])) |
| 13879 | { |
| 13880 | case PACKET_OK: |
| 13881 | if (strcmp (rs->buf, "OK") != 0) |
| 13882 | error (_("Remote refused setting thread events: %s"), rs->buf); |
| 13883 | break; |
| 13884 | case PACKET_ERROR: |
| 13885 | warning (_("Remote failure reply: %s"), rs->buf); |
| 13886 | break; |
| 13887 | case PACKET_UNKNOWN: |
| 13888 | break; |
| 13889 | } |
| 13890 | } |
| 13891 | |
| 13892 | static void |
| 13893 | set_remote_cmd (const char *args, int from_tty) |
| 13894 | { |
| 13895 | help_list (remote_set_cmdlist, "set remote ", all_commands, gdb_stdout); |
| 13896 | } |
| 13897 | |
| 13898 | static void |
| 13899 | show_remote_cmd (const char *args, int from_tty) |
| 13900 | { |
| 13901 | /* We can't just use cmd_show_list here, because we want to skip |
| 13902 | the redundant "show remote Z-packet" and the legacy aliases. */ |
| 13903 | struct cmd_list_element *list = remote_show_cmdlist; |
| 13904 | struct ui_out *uiout = current_uiout; |
| 13905 | |
| 13906 | ui_out_emit_tuple tuple_emitter (uiout, "showlist"); |
| 13907 | for (; list != NULL; list = list->next) |
| 13908 | if (strcmp (list->name, "Z-packet") == 0) |
| 13909 | continue; |
| 13910 | else if (list->type == not_set_cmd) |
| 13911 | /* Alias commands are exactly like the original, except they |
| 13912 | don't have the normal type. */ |
| 13913 | continue; |
| 13914 | else |
| 13915 | { |
| 13916 | ui_out_emit_tuple option_emitter (uiout, "option"); |
| 13917 | |
| 13918 | uiout->field_string ("name", list->name); |
| 13919 | uiout->text (": "); |
| 13920 | if (list->type == show_cmd) |
| 13921 | do_show_command (NULL, from_tty, list); |
| 13922 | else |
| 13923 | cmd_func (list, NULL, from_tty); |
| 13924 | } |
| 13925 | } |
| 13926 | |
| 13927 | |
| 13928 | /* Function to be called whenever a new objfile (shlib) is detected. */ |
| 13929 | static void |
| 13930 | remote_new_objfile (struct objfile *objfile) |
| 13931 | { |
| 13932 | struct remote_state *rs = get_remote_state (); |
| 13933 | |
| 13934 | if (rs->remote_desc != 0) /* Have a remote connection. */ |
| 13935 | remote_check_symbols (); |
| 13936 | } |
| 13937 | |
| 13938 | /* Pull all the tracepoints defined on the target and create local |
| 13939 | data structures representing them. We don't want to create real |
| 13940 | tracepoints yet, we don't want to mess up the user's existing |
| 13941 | collection. */ |
| 13942 | |
| 13943 | static int |
| 13944 | remote_upload_tracepoints (struct target_ops *self, struct uploaded_tp **utpp) |
| 13945 | { |
| 13946 | struct remote_state *rs = get_remote_state (); |
| 13947 | char *p; |
| 13948 | |
| 13949 | /* Ask for a first packet of tracepoint definition. */ |
| 13950 | putpkt ("qTfP"); |
| 13951 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 13952 | p = rs->buf; |
| 13953 | while (*p && *p != 'l') |
| 13954 | { |
| 13955 | parse_tracepoint_definition (p, utpp); |
| 13956 | /* Ask for another packet of tracepoint definition. */ |
| 13957 | putpkt ("qTsP"); |
| 13958 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 13959 | p = rs->buf; |
| 13960 | } |
| 13961 | return 0; |
| 13962 | } |
| 13963 | |
| 13964 | static int |
| 13965 | remote_upload_trace_state_variables (struct target_ops *self, |
| 13966 | struct uploaded_tsv **utsvp) |
| 13967 | { |
| 13968 | struct remote_state *rs = get_remote_state (); |
| 13969 | char *p; |
| 13970 | |
| 13971 | /* Ask for a first packet of variable definition. */ |
| 13972 | putpkt ("qTfV"); |
| 13973 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 13974 | p = rs->buf; |
| 13975 | while (*p && *p != 'l') |
| 13976 | { |
| 13977 | parse_tsv_definition (p, utsvp); |
| 13978 | /* Ask for another packet of variable definition. */ |
| 13979 | putpkt ("qTsV"); |
| 13980 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 13981 | p = rs->buf; |
| 13982 | } |
| 13983 | return 0; |
| 13984 | } |
| 13985 | |
| 13986 | /* The "set/show range-stepping" show hook. */ |
| 13987 | |
| 13988 | static void |
| 13989 | show_range_stepping (struct ui_file *file, int from_tty, |
| 13990 | struct cmd_list_element *c, |
| 13991 | const char *value) |
| 13992 | { |
| 13993 | fprintf_filtered (file, |
| 13994 | _("Debugger's willingness to use range stepping " |
| 13995 | "is %s.\n"), value); |
| 13996 | } |
| 13997 | |
| 13998 | /* The "set/show range-stepping" set hook. */ |
| 13999 | |
| 14000 | static void |
| 14001 | set_range_stepping (char *ignore_args, int from_tty, |
| 14002 | struct cmd_list_element *c) |
| 14003 | { |
| 14004 | struct remote_state *rs = get_remote_state (); |
| 14005 | |
| 14006 | /* Whene enabling, check whether range stepping is actually |
| 14007 | supported by the target, and warn if not. */ |
| 14008 | if (use_range_stepping) |
| 14009 | { |
| 14010 | if (rs->remote_desc != NULL) |
| 14011 | { |
| 14012 | if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN) |
| 14013 | remote_vcont_probe (rs); |
| 14014 | |
| 14015 | if (packet_support (PACKET_vCont) == PACKET_ENABLE |
| 14016 | && rs->supports_vCont.r) |
| 14017 | return; |
| 14018 | } |
| 14019 | |
| 14020 | warning (_("Range stepping is not supported by the current target")); |
| 14021 | } |
| 14022 | } |
| 14023 | |
| 14024 | void |
| 14025 | _initialize_remote (void) |
| 14026 | { |
| 14027 | struct cmd_list_element *cmd; |
| 14028 | const char *cmd_name; |
| 14029 | |
| 14030 | /* architecture specific data */ |
| 14031 | remote_gdbarch_data_handle = |
| 14032 | gdbarch_data_register_post_init (init_remote_state); |
| 14033 | remote_g_packet_data_handle = |
| 14034 | gdbarch_data_register_pre_init (remote_g_packet_data_init); |
| 14035 | |
| 14036 | remote_pspace_data |
| 14037 | = register_program_space_data_with_cleanup (NULL, |
| 14038 | remote_pspace_data_cleanup); |
| 14039 | |
| 14040 | /* Initialize the per-target state. At the moment there is only one |
| 14041 | of these, not one per target. Only one target is active at a |
| 14042 | time. */ |
| 14043 | remote_state = new_remote_state (); |
| 14044 | |
| 14045 | init_remote_ops (); |
| 14046 | add_target (&remote_ops); |
| 14047 | |
| 14048 | init_extended_remote_ops (); |
| 14049 | add_target (&extended_remote_ops); |
| 14050 | |
| 14051 | /* Hook into new objfile notification. */ |
| 14052 | observer_attach_new_objfile (remote_new_objfile); |
| 14053 | /* We're no longer interested in notification events of an inferior |
| 14054 | when it exits. */ |
| 14055 | observer_attach_inferior_exit (discard_pending_stop_replies); |
| 14056 | |
| 14057 | #if 0 |
| 14058 | init_remote_threadtests (); |
| 14059 | #endif |
| 14060 | |
| 14061 | stop_reply_queue = QUEUE_alloc (stop_reply_p, stop_reply_xfree); |
| 14062 | /* set/show remote ... */ |
| 14063 | |
| 14064 | add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\ |
| 14065 | Remote protocol specific variables\n\ |
| 14066 | Configure various remote-protocol specific variables such as\n\ |
| 14067 | the packets being used"), |
| 14068 | &remote_set_cmdlist, "set remote ", |
| 14069 | 0 /* allow-unknown */, &setlist); |
| 14070 | add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\ |
| 14071 | Remote protocol specific variables\n\ |
| 14072 | Configure various remote-protocol specific variables such as\n\ |
| 14073 | the packets being used"), |
| 14074 | &remote_show_cmdlist, "show remote ", |
| 14075 | 0 /* allow-unknown */, &showlist); |
| 14076 | |
| 14077 | add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\ |
| 14078 | Compare section data on target to the exec file.\n\ |
| 14079 | Argument is a single section name (default: all loaded sections).\n\ |
| 14080 | To compare only read-only loaded sections, specify the -r option."), |
| 14081 | &cmdlist); |
| 14082 | |
| 14083 | add_cmd ("packet", class_maintenance, packet_command, _("\ |
| 14084 | Send an arbitrary packet to a remote target.\n\ |
| 14085 | maintenance packet TEXT\n\ |
| 14086 | If GDB is talking to an inferior via the GDB serial protocol, then\n\ |
| 14087 | this command sends the string TEXT to the inferior, and displays the\n\ |
| 14088 | response packet. GDB supplies the initial `$' character, and the\n\ |
| 14089 | terminating `#' character and checksum."), |
| 14090 | &maintenancelist); |
| 14091 | |
| 14092 | add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\ |
| 14093 | Set whether to send break if interrupted."), _("\ |
| 14094 | Show whether to send break if interrupted."), _("\ |
| 14095 | If set, a break, instead of a cntrl-c, is sent to the remote target."), |
| 14096 | set_remotebreak, show_remotebreak, |
| 14097 | &setlist, &showlist); |
| 14098 | cmd_name = "remotebreak"; |
| 14099 | cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1); |
| 14100 | deprecate_cmd (cmd, "set remote interrupt-sequence"); |
| 14101 | cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */ |
| 14102 | cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1); |
| 14103 | deprecate_cmd (cmd, "show remote interrupt-sequence"); |
| 14104 | |
| 14105 | add_setshow_enum_cmd ("interrupt-sequence", class_support, |
| 14106 | interrupt_sequence_modes, &interrupt_sequence_mode, |
| 14107 | _("\ |
| 14108 | Set interrupt sequence to remote target."), _("\ |
| 14109 | Show interrupt sequence to remote target."), _("\ |
| 14110 | Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."), |
| 14111 | NULL, show_interrupt_sequence, |
| 14112 | &remote_set_cmdlist, |
| 14113 | &remote_show_cmdlist); |
| 14114 | |
| 14115 | add_setshow_boolean_cmd ("interrupt-on-connect", class_support, |
| 14116 | &interrupt_on_connect, _("\ |
| 14117 | Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \ |
| 14118 | Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \ |
| 14119 | If set, interrupt sequence is sent to remote target."), |
| 14120 | NULL, NULL, |
| 14121 | &remote_set_cmdlist, &remote_show_cmdlist); |
| 14122 | |
| 14123 | /* Install commands for configuring memory read/write packets. */ |
| 14124 | |
| 14125 | add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\ |
| 14126 | Set the maximum number of bytes per memory write packet (deprecated)."), |
| 14127 | &setlist); |
| 14128 | add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\ |
| 14129 | Show the maximum number of bytes per memory write packet (deprecated)."), |
| 14130 | &showlist); |
| 14131 | add_cmd ("memory-write-packet-size", no_class, |
| 14132 | set_memory_write_packet_size, _("\ |
| 14133 | Set the maximum number of bytes per memory-write packet.\n\ |
| 14134 | Specify the number of bytes in a packet or 0 (zero) for the\n\ |
| 14135 | default packet size. The actual limit is further reduced\n\ |
| 14136 | dependent on the target. Specify ``fixed'' to disable the\n\ |
| 14137 | further restriction and ``limit'' to enable that restriction."), |
| 14138 | &remote_set_cmdlist); |
| 14139 | add_cmd ("memory-read-packet-size", no_class, |
| 14140 | set_memory_read_packet_size, _("\ |
| 14141 | Set the maximum number of bytes per memory-read packet.\n\ |
| 14142 | Specify the number of bytes in a packet or 0 (zero) for the\n\ |
| 14143 | default packet size. The actual limit is further reduced\n\ |
| 14144 | dependent on the target. Specify ``fixed'' to disable the\n\ |
| 14145 | further restriction and ``limit'' to enable that restriction."), |
| 14146 | &remote_set_cmdlist); |
| 14147 | add_cmd ("memory-write-packet-size", no_class, |
| 14148 | show_memory_write_packet_size, |
| 14149 | _("Show the maximum number of bytes per memory-write packet."), |
| 14150 | &remote_show_cmdlist); |
| 14151 | add_cmd ("memory-read-packet-size", no_class, |
| 14152 | show_memory_read_packet_size, |
| 14153 | _("Show the maximum number of bytes per memory-read packet."), |
| 14154 | &remote_show_cmdlist); |
| 14155 | |
| 14156 | add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class, |
| 14157 | &remote_hw_watchpoint_limit, _("\ |
| 14158 | Set the maximum number of target hardware watchpoints."), _("\ |
| 14159 | Show the maximum number of target hardware watchpoints."), _("\ |
| 14160 | Specify a negative limit for unlimited."), |
| 14161 | NULL, NULL, /* FIXME: i18n: The maximum |
| 14162 | number of target hardware |
| 14163 | watchpoints is %s. */ |
| 14164 | &remote_set_cmdlist, &remote_show_cmdlist); |
| 14165 | add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class, |
| 14166 | &remote_hw_watchpoint_length_limit, _("\ |
| 14167 | Set the maximum length (in bytes) of a target hardware watchpoint."), _("\ |
| 14168 | Show the maximum length (in bytes) of a target hardware watchpoint."), _("\ |
| 14169 | Specify a negative limit for unlimited."), |
| 14170 | NULL, NULL, /* FIXME: i18n: The maximum |
| 14171 | length (in bytes) of a target |
| 14172 | hardware watchpoint is %s. */ |
| 14173 | &remote_set_cmdlist, &remote_show_cmdlist); |
| 14174 | add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class, |
| 14175 | &remote_hw_breakpoint_limit, _("\ |
| 14176 | Set the maximum number of target hardware breakpoints."), _("\ |
| 14177 | Show the maximum number of target hardware breakpoints."), _("\ |
| 14178 | Specify a negative limit for unlimited."), |
| 14179 | NULL, NULL, /* FIXME: i18n: The maximum |
| 14180 | number of target hardware |
| 14181 | breakpoints is %s. */ |
| 14182 | &remote_set_cmdlist, &remote_show_cmdlist); |
| 14183 | |
| 14184 | add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure, |
| 14185 | &remote_address_size, _("\ |
| 14186 | Set the maximum size of the address (in bits) in a memory packet."), _("\ |
| 14187 | Show the maximum size of the address (in bits) in a memory packet."), NULL, |
| 14188 | NULL, |
| 14189 | NULL, /* FIXME: i18n: */ |
| 14190 | &setlist, &showlist); |
| 14191 | |
| 14192 | init_all_packet_configs (); |
| 14193 | |
| 14194 | add_packet_config_cmd (&remote_protocol_packets[PACKET_X], |
| 14195 | "X", "binary-download", 1); |
| 14196 | |
| 14197 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont], |
| 14198 | "vCont", "verbose-resume", 0); |
| 14199 | |
| 14200 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals], |
| 14201 | "QPassSignals", "pass-signals", 0); |
| 14202 | |
| 14203 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QCatchSyscalls], |
| 14204 | "QCatchSyscalls", "catch-syscalls", 0); |
| 14205 | |
| 14206 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QProgramSignals], |
| 14207 | "QProgramSignals", "program-signals", 0); |
| 14208 | |
| 14209 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QSetWorkingDir], |
| 14210 | "QSetWorkingDir", "set-working-dir", 0); |
| 14211 | |
| 14212 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartupWithShell], |
| 14213 | "QStartupWithShell", "startup-with-shell", 0); |
| 14214 | |
| 14215 | add_packet_config_cmd (&remote_protocol_packets |
| 14216 | [PACKET_QEnvironmentHexEncoded], |
| 14217 | "QEnvironmentHexEncoded", "environment-hex-encoded", |
| 14218 | 0); |
| 14219 | |
| 14220 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QEnvironmentReset], |
| 14221 | "QEnvironmentReset", "environment-reset", |
| 14222 | 0); |
| 14223 | |
| 14224 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QEnvironmentUnset], |
| 14225 | "QEnvironmentUnset", "environment-unset", |
| 14226 | 0); |
| 14227 | |
| 14228 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol], |
| 14229 | "qSymbol", "symbol-lookup", 0); |
| 14230 | |
| 14231 | add_packet_config_cmd (&remote_protocol_packets[PACKET_P], |
| 14232 | "P", "set-register", 1); |
| 14233 | |
| 14234 | add_packet_config_cmd (&remote_protocol_packets[PACKET_p], |
| 14235 | "p", "fetch-register", 1); |
| 14236 | |
| 14237 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0], |
| 14238 | "Z0", "software-breakpoint", 0); |
| 14239 | |
| 14240 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1], |
| 14241 | "Z1", "hardware-breakpoint", 0); |
| 14242 | |
| 14243 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2], |
| 14244 | "Z2", "write-watchpoint", 0); |
| 14245 | |
| 14246 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3], |
| 14247 | "Z3", "read-watchpoint", 0); |
| 14248 | |
| 14249 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4], |
| 14250 | "Z4", "access-watchpoint", 0); |
| 14251 | |
| 14252 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv], |
| 14253 | "qXfer:auxv:read", "read-aux-vector", 0); |
| 14254 | |
| 14255 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_exec_file], |
| 14256 | "qXfer:exec-file:read", "pid-to-exec-file", 0); |
| 14257 | |
| 14258 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features], |
| 14259 | "qXfer:features:read", "target-features", 0); |
| 14260 | |
| 14261 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries], |
| 14262 | "qXfer:libraries:read", "library-info", 0); |
| 14263 | |
| 14264 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4], |
| 14265 | "qXfer:libraries-svr4:read", "library-info-svr4", 0); |
| 14266 | |
| 14267 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map], |
| 14268 | "qXfer:memory-map:read", "memory-map", 0); |
| 14269 | |
| 14270 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read], |
| 14271 | "qXfer:spu:read", "read-spu-object", 0); |
| 14272 | |
| 14273 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write], |
| 14274 | "qXfer:spu:write", "write-spu-object", 0); |
| 14275 | |
| 14276 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata], |
| 14277 | "qXfer:osdata:read", "osdata", 0); |
| 14278 | |
| 14279 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads], |
| 14280 | "qXfer:threads:read", "threads", 0); |
| 14281 | |
| 14282 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read], |
| 14283 | "qXfer:siginfo:read", "read-siginfo-object", 0); |
| 14284 | |
| 14285 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write], |
| 14286 | "qXfer:siginfo:write", "write-siginfo-object", 0); |
| 14287 | |
| 14288 | add_packet_config_cmd |
| 14289 | (&remote_protocol_packets[PACKET_qXfer_traceframe_info], |
| 14290 | "qXfer:traceframe-info:read", "traceframe-info", 0); |
| 14291 | |
| 14292 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_uib], |
| 14293 | "qXfer:uib:read", "unwind-info-block", 0); |
| 14294 | |
| 14295 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr], |
| 14296 | "qGetTLSAddr", "get-thread-local-storage-address", |
| 14297 | 0); |
| 14298 | |
| 14299 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr], |
| 14300 | "qGetTIBAddr", "get-thread-information-block-address", |
| 14301 | 0); |
| 14302 | |
| 14303 | add_packet_config_cmd (&remote_protocol_packets[PACKET_bc], |
| 14304 | "bc", "reverse-continue", 0); |
| 14305 | |
| 14306 | add_packet_config_cmd (&remote_protocol_packets[PACKET_bs], |
| 14307 | "bs", "reverse-step", 0); |
| 14308 | |
| 14309 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported], |
| 14310 | "qSupported", "supported-packets", 0); |
| 14311 | |
| 14312 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory], |
| 14313 | "qSearch:memory", "search-memory", 0); |
| 14314 | |
| 14315 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qTStatus], |
| 14316 | "qTStatus", "trace-status", 0); |
| 14317 | |
| 14318 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_setfs], |
| 14319 | "vFile:setfs", "hostio-setfs", 0); |
| 14320 | |
| 14321 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open], |
| 14322 | "vFile:open", "hostio-open", 0); |
| 14323 | |
| 14324 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread], |
| 14325 | "vFile:pread", "hostio-pread", 0); |
| 14326 | |
| 14327 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite], |
| 14328 | "vFile:pwrite", "hostio-pwrite", 0); |
| 14329 | |
| 14330 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close], |
| 14331 | "vFile:close", "hostio-close", 0); |
| 14332 | |
| 14333 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink], |
| 14334 | "vFile:unlink", "hostio-unlink", 0); |
| 14335 | |
| 14336 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink], |
| 14337 | "vFile:readlink", "hostio-readlink", 0); |
| 14338 | |
| 14339 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_fstat], |
| 14340 | "vFile:fstat", "hostio-fstat", 0); |
| 14341 | |
| 14342 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach], |
| 14343 | "vAttach", "attach", 0); |
| 14344 | |
| 14345 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun], |
| 14346 | "vRun", "run", 0); |
| 14347 | |
| 14348 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode], |
| 14349 | "QStartNoAckMode", "noack", 0); |
| 14350 | |
| 14351 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill], |
| 14352 | "vKill", "kill", 0); |
| 14353 | |
| 14354 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached], |
| 14355 | "qAttached", "query-attached", 0); |
| 14356 | |
| 14357 | add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints], |
| 14358 | "ConditionalTracepoints", |
| 14359 | "conditional-tracepoints", 0); |
| 14360 | |
| 14361 | add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints], |
| 14362 | "ConditionalBreakpoints", |
| 14363 | "conditional-breakpoints", 0); |
| 14364 | |
| 14365 | add_packet_config_cmd (&remote_protocol_packets[PACKET_BreakpointCommands], |
| 14366 | "BreakpointCommands", |
| 14367 | "breakpoint-commands", 0); |
| 14368 | |
| 14369 | add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints], |
| 14370 | "FastTracepoints", "fast-tracepoints", 0); |
| 14371 | |
| 14372 | add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource], |
| 14373 | "TracepointSource", "TracepointSource", 0); |
| 14374 | |
| 14375 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow], |
| 14376 | "QAllow", "allow", 0); |
| 14377 | |
| 14378 | add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints], |
| 14379 | "StaticTracepoints", "static-tracepoints", 0); |
| 14380 | |
| 14381 | add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace], |
| 14382 | "InstallInTrace", "install-in-trace", 0); |
| 14383 | |
| 14384 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read], |
| 14385 | "qXfer:statictrace:read", "read-sdata-object", 0); |
| 14386 | |
| 14387 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic], |
| 14388 | "qXfer:fdpic:read", "read-fdpic-loadmap", 0); |
| 14389 | |
| 14390 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization], |
| 14391 | "QDisableRandomization", "disable-randomization", 0); |
| 14392 | |
| 14393 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QAgent], |
| 14394 | "QAgent", "agent", 0); |
| 14395 | |
| 14396 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QTBuffer_size], |
| 14397 | "QTBuffer:size", "trace-buffer-size", 0); |
| 14398 | |
| 14399 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_off], |
| 14400 | "Qbtrace:off", "disable-btrace", 0); |
| 14401 | |
| 14402 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts], |
| 14403 | "Qbtrace:bts", "enable-btrace-bts", 0); |
| 14404 | |
| 14405 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_pt], |
| 14406 | "Qbtrace:pt", "enable-btrace-pt", 0); |
| 14407 | |
| 14408 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace], |
| 14409 | "qXfer:btrace", "read-btrace", 0); |
| 14410 | |
| 14411 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace_conf], |
| 14412 | "qXfer:btrace-conf", "read-btrace-conf", 0); |
| 14413 | |
| 14414 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_bts_size], |
| 14415 | "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0); |
| 14416 | |
| 14417 | add_packet_config_cmd (&remote_protocol_packets[PACKET_multiprocess_feature], |
| 14418 | "multiprocess-feature", "multiprocess-feature", 0); |
| 14419 | |
| 14420 | add_packet_config_cmd (&remote_protocol_packets[PACKET_swbreak_feature], |
| 14421 | "swbreak-feature", "swbreak-feature", 0); |
| 14422 | |
| 14423 | add_packet_config_cmd (&remote_protocol_packets[PACKET_hwbreak_feature], |
| 14424 | "hwbreak-feature", "hwbreak-feature", 0); |
| 14425 | |
| 14426 | add_packet_config_cmd (&remote_protocol_packets[PACKET_fork_event_feature], |
| 14427 | "fork-event-feature", "fork-event-feature", 0); |
| 14428 | |
| 14429 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vfork_event_feature], |
| 14430 | "vfork-event-feature", "vfork-event-feature", 0); |
| 14431 | |
| 14432 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_pt_size], |
| 14433 | "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0); |
| 14434 | |
| 14435 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vContSupported], |
| 14436 | "vContSupported", "verbose-resume-supported", 0); |
| 14437 | |
| 14438 | add_packet_config_cmd (&remote_protocol_packets[PACKET_exec_event_feature], |
| 14439 | "exec-event-feature", "exec-event-feature", 0); |
| 14440 | |
| 14441 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vCtrlC], |
| 14442 | "vCtrlC", "ctrl-c", 0); |
| 14443 | |
| 14444 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QThreadEvents], |
| 14445 | "QThreadEvents", "thread-events", 0); |
| 14446 | |
| 14447 | add_packet_config_cmd (&remote_protocol_packets[PACKET_no_resumed], |
| 14448 | "N stop reply", "no-resumed-stop-reply", 0); |
| 14449 | |
| 14450 | /* Assert that we've registered "set remote foo-packet" commands |
| 14451 | for all packet configs. */ |
| 14452 | { |
| 14453 | int i; |
| 14454 | |
| 14455 | for (i = 0; i < PACKET_MAX; i++) |
| 14456 | { |
| 14457 | /* Ideally all configs would have a command associated. Some |
| 14458 | still don't though. */ |
| 14459 | int excepted; |
| 14460 | |
| 14461 | switch (i) |
| 14462 | { |
| 14463 | case PACKET_QNonStop: |
| 14464 | case PACKET_EnableDisableTracepoints_feature: |
| 14465 | case PACKET_tracenz_feature: |
| 14466 | case PACKET_DisconnectedTracing_feature: |
| 14467 | case PACKET_augmented_libraries_svr4_read_feature: |
| 14468 | case PACKET_qCRC: |
| 14469 | /* Additions to this list need to be well justified: |
| 14470 | pre-existing packets are OK; new packets are not. */ |
| 14471 | excepted = 1; |
| 14472 | break; |
| 14473 | default: |
| 14474 | excepted = 0; |
| 14475 | break; |
| 14476 | } |
| 14477 | |
| 14478 | /* This catches both forgetting to add a config command, and |
| 14479 | forgetting to remove a packet from the exception list. */ |
| 14480 | gdb_assert (excepted == (remote_protocol_packets[i].name == NULL)); |
| 14481 | } |
| 14482 | } |
| 14483 | |
| 14484 | /* Keep the old ``set remote Z-packet ...'' working. Each individual |
| 14485 | Z sub-packet has its own set and show commands, but users may |
| 14486 | have sets to this variable in their .gdbinit files (or in their |
| 14487 | documentation). */ |
| 14488 | add_setshow_auto_boolean_cmd ("Z-packet", class_obscure, |
| 14489 | &remote_Z_packet_detect, _("\ |
| 14490 | Set use of remote protocol `Z' packets"), _("\ |
| 14491 | Show use of remote protocol `Z' packets "), _("\ |
| 14492 | When set, GDB will attempt to use the remote breakpoint and watchpoint\n\ |
| 14493 | packets."), |
| 14494 | set_remote_protocol_Z_packet_cmd, |
| 14495 | show_remote_protocol_Z_packet_cmd, |
| 14496 | /* FIXME: i18n: Use of remote protocol |
| 14497 | `Z' packets is %s. */ |
| 14498 | &remote_set_cmdlist, &remote_show_cmdlist); |
| 14499 | |
| 14500 | add_prefix_cmd ("remote", class_files, remote_command, _("\ |
| 14501 | Manipulate files on the remote system\n\ |
| 14502 | Transfer files to and from the remote target system."), |
| 14503 | &remote_cmdlist, "remote ", |
| 14504 | 0 /* allow-unknown */, &cmdlist); |
| 14505 | |
| 14506 | add_cmd ("put", class_files, remote_put_command, |
| 14507 | _("Copy a local file to the remote system."), |
| 14508 | &remote_cmdlist); |
| 14509 | |
| 14510 | add_cmd ("get", class_files, remote_get_command, |
| 14511 | _("Copy a remote file to the local system."), |
| 14512 | &remote_cmdlist); |
| 14513 | |
| 14514 | add_cmd ("delete", class_files, remote_delete_command, |
| 14515 | _("Delete a remote file."), |
| 14516 | &remote_cmdlist); |
| 14517 | |
| 14518 | add_setshow_string_noescape_cmd ("exec-file", class_files, |
| 14519 | &remote_exec_file_var, _("\ |
| 14520 | Set the remote pathname for \"run\""), _("\ |
| 14521 | Show the remote pathname for \"run\""), NULL, |
| 14522 | set_remote_exec_file, |
| 14523 | show_remote_exec_file, |
| 14524 | &remote_set_cmdlist, |
| 14525 | &remote_show_cmdlist); |
| 14526 | |
| 14527 | add_setshow_boolean_cmd ("range-stepping", class_run, |
| 14528 | &use_range_stepping, _("\ |
| 14529 | Enable or disable range stepping."), _("\ |
| 14530 | Show whether target-assisted range stepping is enabled."), _("\ |
| 14531 | If on, and the target supports it, when stepping a source line, GDB\n\ |
| 14532 | tells the target to step the corresponding range of addresses itself instead\n\ |
| 14533 | of issuing multiple single-steps. This speeds up source level\n\ |
| 14534 | stepping. If off, GDB always issues single-steps, even if range\n\ |
| 14535 | stepping is supported by the target. The default is on."), |
| 14536 | set_range_stepping, |
| 14537 | show_range_stepping, |
| 14538 | &setlist, |
| 14539 | &showlist); |
| 14540 | |
| 14541 | /* Eventually initialize fileio. See fileio.c */ |
| 14542 | initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist); |
| 14543 | |
| 14544 | /* Take advantage of the fact that the TID field is not used, to tag |
| 14545 | special ptids with it set to != 0. */ |
| 14546 | magic_null_ptid = ptid_build (42000, -1, 1); |
| 14547 | not_sent_ptid = ptid_build (42000, -2, 1); |
| 14548 | any_thread_ptid = ptid_build (42000, 0, 1); |
| 14549 | } |