| 1 | /* Remote target communications for serial-line targets in custom GDB protocol |
| 2 | |
| 3 | Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
| 4 | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
| 5 | Free Software Foundation, Inc. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | /* See the GDB User Guide for details of the GDB remote protocol. */ |
| 23 | |
| 24 | #include "defs.h" |
| 25 | #include "gdb_string.h" |
| 26 | #include <ctype.h> |
| 27 | #include <fcntl.h> |
| 28 | #include "inferior.h" |
| 29 | #include "bfd.h" |
| 30 | #include "symfile.h" |
| 31 | #include "exceptions.h" |
| 32 | #include "target.h" |
| 33 | /*#include "terminal.h" */ |
| 34 | #include "gdbcmd.h" |
| 35 | #include "objfiles.h" |
| 36 | #include "gdb-stabs.h" |
| 37 | #include "gdbthread.h" |
| 38 | #include "remote.h" |
| 39 | #include "regcache.h" |
| 40 | #include "value.h" |
| 41 | #include "gdb_assert.h" |
| 42 | #include "observer.h" |
| 43 | #include "solib.h" |
| 44 | #include "cli/cli-decode.h" |
| 45 | #include "cli/cli-setshow.h" |
| 46 | #include "target-descriptions.h" |
| 47 | |
| 48 | #include <ctype.h> |
| 49 | #include <sys/time.h> |
| 50 | |
| 51 | #include "event-loop.h" |
| 52 | #include "event-top.h" |
| 53 | #include "inf-loop.h" |
| 54 | |
| 55 | #include <signal.h> |
| 56 | #include "serial.h" |
| 57 | |
| 58 | #include "gdbcore.h" /* for exec_bfd */ |
| 59 | |
| 60 | #include "remote-fileio.h" |
| 61 | #include "gdb/fileio.h" |
| 62 | #include "gdb_stat.h" |
| 63 | |
| 64 | #include "memory-map.h" |
| 65 | |
| 66 | /* The size to align memory write packets, when practical. The protocol |
| 67 | does not guarantee any alignment, and gdb will generate short |
| 68 | writes and unaligned writes, but even as a best-effort attempt this |
| 69 | can improve bulk transfers. For instance, if a write is misaligned |
| 70 | relative to the target's data bus, the stub may need to make an extra |
| 71 | round trip fetching data from the target. This doesn't make a |
| 72 | huge difference, but it's easy to do, so we try to be helpful. |
| 73 | |
| 74 | The alignment chosen is arbitrary; usually data bus width is |
| 75 | important here, not the possibly larger cache line size. */ |
| 76 | enum { REMOTE_ALIGN_WRITES = 16 }; |
| 77 | |
| 78 | /* Prototypes for local functions. */ |
| 79 | static void cleanup_sigint_signal_handler (void *dummy); |
| 80 | static void initialize_sigint_signal_handler (void); |
| 81 | static int getpkt_sane (char **buf, long *sizeof_buf, int forever); |
| 82 | static int getpkt_or_notif_sane (char **buf, long *sizeof_buf, |
| 83 | int forever); |
| 84 | |
| 85 | static void handle_remote_sigint (int); |
| 86 | static void handle_remote_sigint_twice (int); |
| 87 | static void async_remote_interrupt (gdb_client_data); |
| 88 | void async_remote_interrupt_twice (gdb_client_data); |
| 89 | |
| 90 | static void remote_files_info (struct target_ops *ignore); |
| 91 | |
| 92 | static void remote_prepare_to_store (struct regcache *regcache); |
| 93 | |
| 94 | static void remote_open (char *name, int from_tty); |
| 95 | |
| 96 | static void extended_remote_open (char *name, int from_tty); |
| 97 | |
| 98 | static void remote_open_1 (char *, int, struct target_ops *, int extended_p); |
| 99 | |
| 100 | static void remote_close (int quitting); |
| 101 | |
| 102 | static void remote_mourn (struct target_ops *ops); |
| 103 | |
| 104 | static void extended_remote_restart (void); |
| 105 | |
| 106 | static void extended_remote_mourn (struct target_ops *); |
| 107 | |
| 108 | static void remote_mourn_1 (struct target_ops *); |
| 109 | |
| 110 | static void remote_send (char **buf, long *sizeof_buf_p); |
| 111 | |
| 112 | static int readchar (int timeout); |
| 113 | |
| 114 | static void remote_kill (struct target_ops *ops); |
| 115 | |
| 116 | static int tohex (int nib); |
| 117 | |
| 118 | static int remote_can_async_p (void); |
| 119 | |
| 120 | static int remote_is_async_p (void); |
| 121 | |
| 122 | static void remote_async (void (*callback) (enum inferior_event_type event_type, |
| 123 | void *context), void *context); |
| 124 | |
| 125 | static int remote_async_mask (int new_mask); |
| 126 | |
| 127 | static void remote_detach (struct target_ops *ops, char *args, int from_tty); |
| 128 | |
| 129 | static void remote_interrupt (int signo); |
| 130 | |
| 131 | static void remote_interrupt_twice (int signo); |
| 132 | |
| 133 | static void interrupt_query (void); |
| 134 | |
| 135 | static void set_general_thread (struct ptid ptid); |
| 136 | static void set_continue_thread (struct ptid ptid); |
| 137 | |
| 138 | static void get_offsets (void); |
| 139 | |
| 140 | static void skip_frame (void); |
| 141 | |
| 142 | static long read_frame (char **buf_p, long *sizeof_buf); |
| 143 | |
| 144 | static int hexnumlen (ULONGEST num); |
| 145 | |
| 146 | static void init_remote_ops (void); |
| 147 | |
| 148 | static void init_extended_remote_ops (void); |
| 149 | |
| 150 | static void remote_stop (ptid_t); |
| 151 | |
| 152 | static int ishex (int ch, int *val); |
| 153 | |
| 154 | static int stubhex (int ch); |
| 155 | |
| 156 | static int hexnumstr (char *, ULONGEST); |
| 157 | |
| 158 | static int hexnumnstr (char *, ULONGEST, int); |
| 159 | |
| 160 | static CORE_ADDR remote_address_masked (CORE_ADDR); |
| 161 | |
| 162 | static void print_packet (char *); |
| 163 | |
| 164 | static unsigned long crc32 (unsigned char *, int, unsigned int); |
| 165 | |
| 166 | static void compare_sections_command (char *, int); |
| 167 | |
| 168 | static void packet_command (char *, int); |
| 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 void remote_find_new_threads (void); |
| 175 | |
| 176 | static void record_currthread (ptid_t currthread); |
| 177 | |
| 178 | static int fromhex (int a); |
| 179 | |
| 180 | static int hex2bin (const char *hex, gdb_byte *bin, int count); |
| 181 | |
| 182 | static int bin2hex (const gdb_byte *bin, char *hex, int count); |
| 183 | |
| 184 | static int putpkt_binary (char *buf, int cnt); |
| 185 | |
| 186 | static void check_binary_download (CORE_ADDR addr); |
| 187 | |
| 188 | struct packet_config; |
| 189 | |
| 190 | static void show_packet_config_cmd (struct packet_config *config); |
| 191 | |
| 192 | static void update_packet_config (struct packet_config *config); |
| 193 | |
| 194 | static void set_remote_protocol_packet_cmd (char *args, int from_tty, |
| 195 | struct cmd_list_element *c); |
| 196 | |
| 197 | static void show_remote_protocol_packet_cmd (struct ui_file *file, |
| 198 | int from_tty, |
| 199 | struct cmd_list_element *c, |
| 200 | const char *value); |
| 201 | |
| 202 | static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid); |
| 203 | static ptid_t read_ptid (char *buf, char **obuf); |
| 204 | |
| 205 | static void remote_query_supported (void); |
| 206 | |
| 207 | static void remote_check_symbols (struct objfile *objfile); |
| 208 | |
| 209 | void _initialize_remote (void); |
| 210 | |
| 211 | struct stop_reply; |
| 212 | static struct stop_reply *stop_reply_xmalloc (void); |
| 213 | static void stop_reply_xfree (struct stop_reply *); |
| 214 | static void do_stop_reply_xfree (void *arg); |
| 215 | static void remote_parse_stop_reply (char *buf, struct stop_reply *); |
| 216 | static void push_stop_reply (struct stop_reply *); |
| 217 | static void remote_get_pending_stop_replies (void); |
| 218 | static void discard_pending_stop_replies (int pid); |
| 219 | static int peek_stop_reply (ptid_t ptid); |
| 220 | |
| 221 | static void remote_async_inferior_event_handler (gdb_client_data); |
| 222 | static void remote_async_get_pending_events_handler (gdb_client_data); |
| 223 | |
| 224 | static void remote_terminal_ours (void); |
| 225 | |
| 226 | static int remote_read_description_p (struct target_ops *target); |
| 227 | |
| 228 | /* The non-stop remote protocol provisions for one pending stop reply. |
| 229 | This is where we keep it until it is acknowledged. */ |
| 230 | |
| 231 | static struct stop_reply *pending_stop_reply = NULL; |
| 232 | |
| 233 | /* For "remote". */ |
| 234 | |
| 235 | static struct cmd_list_element *remote_cmdlist; |
| 236 | |
| 237 | /* For "set remote" and "show remote". */ |
| 238 | |
| 239 | static struct cmd_list_element *remote_set_cmdlist; |
| 240 | static struct cmd_list_element *remote_show_cmdlist; |
| 241 | |
| 242 | /* Description of the remote protocol state for the currently |
| 243 | connected target. This is per-target state, and independent of the |
| 244 | selected architecture. */ |
| 245 | |
| 246 | struct remote_state |
| 247 | { |
| 248 | /* A buffer to use for incoming packets, and its current size. The |
| 249 | buffer is grown dynamically for larger incoming packets. |
| 250 | Outgoing packets may also be constructed in this buffer. |
| 251 | BUF_SIZE is always at least REMOTE_PACKET_SIZE; |
| 252 | REMOTE_PACKET_SIZE should be used to limit the length of outgoing |
| 253 | packets. */ |
| 254 | char *buf; |
| 255 | long buf_size; |
| 256 | |
| 257 | /* If we negotiated packet size explicitly (and thus can bypass |
| 258 | heuristics for the largest packet size that will not overflow |
| 259 | a buffer in the stub), this will be set to that packet size. |
| 260 | Otherwise zero, meaning to use the guessed size. */ |
| 261 | long explicit_packet_size; |
| 262 | |
| 263 | /* remote_wait is normally called when the target is running and |
| 264 | waits for a stop reply packet. But sometimes we need to call it |
| 265 | when the target is already stopped. We can send a "?" packet |
| 266 | and have remote_wait read the response. Or, if we already have |
| 267 | the response, we can stash it in BUF and tell remote_wait to |
| 268 | skip calling getpkt. This flag is set when BUF contains a |
| 269 | stop reply packet and the target is not waiting. */ |
| 270 | int cached_wait_status; |
| 271 | |
| 272 | /* True, if in no ack mode. That is, neither GDB nor the stub will |
| 273 | expect acks from each other. The connection is assumed to be |
| 274 | reliable. */ |
| 275 | int noack_mode; |
| 276 | |
| 277 | /* True if we're connected in extended remote mode. */ |
| 278 | int extended; |
| 279 | |
| 280 | /* True if the stub reported support for multi-process |
| 281 | extensions. */ |
| 282 | int multi_process_aware; |
| 283 | |
| 284 | /* True if we resumed the target and we're waiting for the target to |
| 285 | stop. In the mean time, we can't start another command/query. |
| 286 | The remote server wouldn't be ready to process it, so we'd |
| 287 | timeout waiting for a reply that would never come and eventually |
| 288 | we'd close the connection. This can happen in asynchronous mode |
| 289 | because we allow GDB commands while the target is running. */ |
| 290 | int waiting_for_stop_reply; |
| 291 | |
| 292 | /* True if the stub reports support for non-stop mode. */ |
| 293 | int non_stop_aware; |
| 294 | |
| 295 | /* True if the stub reports support for vCont;t. */ |
| 296 | int support_vCont_t; |
| 297 | }; |
| 298 | |
| 299 | /* Returns true if the multi-process extensions are in effect. */ |
| 300 | static int |
| 301 | remote_multi_process_p (struct remote_state *rs) |
| 302 | { |
| 303 | return rs->extended && rs->multi_process_aware; |
| 304 | } |
| 305 | |
| 306 | /* This data could be associated with a target, but we do not always |
| 307 | have access to the current target when we need it, so for now it is |
| 308 | static. This will be fine for as long as only one target is in use |
| 309 | at a time. */ |
| 310 | static struct remote_state remote_state; |
| 311 | |
| 312 | static struct remote_state * |
| 313 | get_remote_state_raw (void) |
| 314 | { |
| 315 | return &remote_state; |
| 316 | } |
| 317 | |
| 318 | /* Description of the remote protocol for a given architecture. */ |
| 319 | |
| 320 | struct packet_reg |
| 321 | { |
| 322 | long offset; /* Offset into G packet. */ |
| 323 | long regnum; /* GDB's internal register number. */ |
| 324 | LONGEST pnum; /* Remote protocol register number. */ |
| 325 | int in_g_packet; /* Always part of G packet. */ |
| 326 | /* long size in bytes; == register_size (target_gdbarch, regnum); |
| 327 | at present. */ |
| 328 | /* char *name; == gdbarch_register_name (target_gdbarch, regnum); |
| 329 | at present. */ |
| 330 | }; |
| 331 | |
| 332 | struct remote_arch_state |
| 333 | { |
| 334 | /* Description of the remote protocol registers. */ |
| 335 | long sizeof_g_packet; |
| 336 | |
| 337 | /* Description of the remote protocol registers indexed by REGNUM |
| 338 | (making an array gdbarch_num_regs in size). */ |
| 339 | struct packet_reg *regs; |
| 340 | |
| 341 | /* This is the size (in chars) of the first response to the ``g'' |
| 342 | packet. It is used as a heuristic when determining the maximum |
| 343 | size of memory-read and memory-write packets. A target will |
| 344 | typically only reserve a buffer large enough to hold the ``g'' |
| 345 | packet. The size does not include packet overhead (headers and |
| 346 | trailers). */ |
| 347 | long actual_register_packet_size; |
| 348 | |
| 349 | /* This is the maximum size (in chars) of a non read/write packet. |
| 350 | It is also used as a cap on the size of read/write packets. */ |
| 351 | long remote_packet_size; |
| 352 | }; |
| 353 | |
| 354 | |
| 355 | /* Handle for retreving the remote protocol data from gdbarch. */ |
| 356 | static struct gdbarch_data *remote_gdbarch_data_handle; |
| 357 | |
| 358 | static struct remote_arch_state * |
| 359 | get_remote_arch_state (void) |
| 360 | { |
| 361 | return gdbarch_data (target_gdbarch, remote_gdbarch_data_handle); |
| 362 | } |
| 363 | |
| 364 | /* Fetch the global remote target state. */ |
| 365 | |
| 366 | static struct remote_state * |
| 367 | get_remote_state (void) |
| 368 | { |
| 369 | /* Make sure that the remote architecture state has been |
| 370 | initialized, because doing so might reallocate rs->buf. Any |
| 371 | function which calls getpkt also needs to be mindful of changes |
| 372 | to rs->buf, but this call limits the number of places which run |
| 373 | into trouble. */ |
| 374 | get_remote_arch_state (); |
| 375 | |
| 376 | return get_remote_state_raw (); |
| 377 | } |
| 378 | |
| 379 | static int |
| 380 | compare_pnums (const void *lhs_, const void *rhs_) |
| 381 | { |
| 382 | const struct packet_reg * const *lhs = lhs_; |
| 383 | const struct packet_reg * const *rhs = rhs_; |
| 384 | |
| 385 | if ((*lhs)->pnum < (*rhs)->pnum) |
| 386 | return -1; |
| 387 | else if ((*lhs)->pnum == (*rhs)->pnum) |
| 388 | return 0; |
| 389 | else |
| 390 | return 1; |
| 391 | } |
| 392 | |
| 393 | static void * |
| 394 | init_remote_state (struct gdbarch *gdbarch) |
| 395 | { |
| 396 | int regnum, num_remote_regs, offset; |
| 397 | struct remote_state *rs = get_remote_state_raw (); |
| 398 | struct remote_arch_state *rsa; |
| 399 | struct packet_reg **remote_regs; |
| 400 | |
| 401 | rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state); |
| 402 | |
| 403 | /* Use the architecture to build a regnum<->pnum table, which will be |
| 404 | 1:1 unless a feature set specifies otherwise. */ |
| 405 | rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch, |
| 406 | gdbarch_num_regs (gdbarch), |
| 407 | struct packet_reg); |
| 408 | for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++) |
| 409 | { |
| 410 | struct packet_reg *r = &rsa->regs[regnum]; |
| 411 | |
| 412 | if (register_size (gdbarch, regnum) == 0) |
| 413 | /* Do not try to fetch zero-sized (placeholder) registers. */ |
| 414 | r->pnum = -1; |
| 415 | else |
| 416 | r->pnum = gdbarch_remote_register_number (gdbarch, regnum); |
| 417 | |
| 418 | r->regnum = regnum; |
| 419 | } |
| 420 | |
| 421 | /* Define the g/G packet format as the contents of each register |
| 422 | with a remote protocol number, in order of ascending protocol |
| 423 | number. */ |
| 424 | |
| 425 | remote_regs = alloca (gdbarch_num_regs (gdbarch) |
| 426 | * sizeof (struct packet_reg *)); |
| 427 | for (num_remote_regs = 0, regnum = 0; |
| 428 | regnum < gdbarch_num_regs (gdbarch); |
| 429 | regnum++) |
| 430 | if (rsa->regs[regnum].pnum != -1) |
| 431 | remote_regs[num_remote_regs++] = &rsa->regs[regnum]; |
| 432 | |
| 433 | qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *), |
| 434 | compare_pnums); |
| 435 | |
| 436 | for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++) |
| 437 | { |
| 438 | remote_regs[regnum]->in_g_packet = 1; |
| 439 | remote_regs[regnum]->offset = offset; |
| 440 | offset += register_size (gdbarch, remote_regs[regnum]->regnum); |
| 441 | } |
| 442 | |
| 443 | /* Record the maximum possible size of the g packet - it may turn out |
| 444 | to be smaller. */ |
| 445 | rsa->sizeof_g_packet = offset; |
| 446 | |
| 447 | /* Default maximum number of characters in a packet body. Many |
| 448 | remote stubs have a hardwired buffer size of 400 bytes |
| 449 | (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used |
| 450 | as the maximum packet-size to ensure that the packet and an extra |
| 451 | NUL character can always fit in the buffer. This stops GDB |
| 452 | trashing stubs that try to squeeze an extra NUL into what is |
| 453 | already a full buffer (As of 1999-12-04 that was most stubs). */ |
| 454 | rsa->remote_packet_size = 400 - 1; |
| 455 | |
| 456 | /* This one is filled in when a ``g'' packet is received. */ |
| 457 | rsa->actual_register_packet_size = 0; |
| 458 | |
| 459 | /* Should rsa->sizeof_g_packet needs more space than the |
| 460 | default, adjust the size accordingly. Remember that each byte is |
| 461 | encoded as two characters. 32 is the overhead for the packet |
| 462 | header / footer. NOTE: cagney/1999-10-26: I suspect that 8 |
| 463 | (``$NN:G...#NN'') is a better guess, the below has been padded a |
| 464 | little. */ |
| 465 | if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2)) |
| 466 | rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32); |
| 467 | |
| 468 | /* Make sure that the packet buffer is plenty big enough for |
| 469 | this architecture. */ |
| 470 | if (rs->buf_size < rsa->remote_packet_size) |
| 471 | { |
| 472 | rs->buf_size = 2 * rsa->remote_packet_size; |
| 473 | rs->buf = xrealloc (rs->buf, rs->buf_size); |
| 474 | } |
| 475 | |
| 476 | return rsa; |
| 477 | } |
| 478 | |
| 479 | /* Return the current allowed size of a remote packet. This is |
| 480 | inferred from the current architecture, and should be used to |
| 481 | limit the length of outgoing packets. */ |
| 482 | static long |
| 483 | get_remote_packet_size (void) |
| 484 | { |
| 485 | struct remote_state *rs = get_remote_state (); |
| 486 | struct remote_arch_state *rsa = get_remote_arch_state (); |
| 487 | |
| 488 | if (rs->explicit_packet_size) |
| 489 | return rs->explicit_packet_size; |
| 490 | |
| 491 | return rsa->remote_packet_size; |
| 492 | } |
| 493 | |
| 494 | static struct packet_reg * |
| 495 | packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum) |
| 496 | { |
| 497 | if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch)) |
| 498 | return NULL; |
| 499 | else |
| 500 | { |
| 501 | struct packet_reg *r = &rsa->regs[regnum]; |
| 502 | gdb_assert (r->regnum == regnum); |
| 503 | return r; |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | static struct packet_reg * |
| 508 | packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum) |
| 509 | { |
| 510 | int i; |
| 511 | for (i = 0; i < gdbarch_num_regs (target_gdbarch); i++) |
| 512 | { |
| 513 | struct packet_reg *r = &rsa->regs[i]; |
| 514 | if (r->pnum == pnum) |
| 515 | return r; |
| 516 | } |
| 517 | return NULL; |
| 518 | } |
| 519 | |
| 520 | /* FIXME: graces/2002-08-08: These variables should eventually be |
| 521 | bound to an instance of the target object (as in gdbarch-tdep()), |
| 522 | when such a thing exists. */ |
| 523 | |
| 524 | /* This is set to the data address of the access causing the target |
| 525 | to stop for a watchpoint. */ |
| 526 | static CORE_ADDR remote_watch_data_address; |
| 527 | |
| 528 | /* This is non-zero if target stopped for a watchpoint. */ |
| 529 | static int remote_stopped_by_watchpoint_p; |
| 530 | |
| 531 | static struct target_ops remote_ops; |
| 532 | |
| 533 | static struct target_ops extended_remote_ops; |
| 534 | |
| 535 | static int remote_async_mask_value = 1; |
| 536 | |
| 537 | /* FIXME: cagney/1999-09-23: Even though getpkt was called with |
| 538 | ``forever'' still use the normal timeout mechanism. This is |
| 539 | currently used by the ASYNC code to guarentee that target reads |
| 540 | during the initial connect always time-out. Once getpkt has been |
| 541 | modified to return a timeout indication and, in turn |
| 542 | remote_wait()/wait_for_inferior() have gained a timeout parameter |
| 543 | this can go away. */ |
| 544 | static int wait_forever_enabled_p = 1; |
| 545 | |
| 546 | |
| 547 | /* This variable chooses whether to send a ^C or a break when the user |
| 548 | requests program interruption. Although ^C is usually what remote |
| 549 | systems expect, and that is the default here, sometimes a break is |
| 550 | preferable instead. */ |
| 551 | |
| 552 | static int remote_break; |
| 553 | |
| 554 | /* Descriptor for I/O to remote machine. Initialize it to NULL so that |
| 555 | remote_open knows that we don't have a file open when the program |
| 556 | starts. */ |
| 557 | static struct serial *remote_desc = NULL; |
| 558 | |
| 559 | /* This variable sets the number of bits in an address that are to be |
| 560 | sent in a memory ("M" or "m") packet. Normally, after stripping |
| 561 | leading zeros, the entire address would be sent. This variable |
| 562 | restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The |
| 563 | initial implementation of remote.c restricted the address sent in |
| 564 | memory packets to ``host::sizeof long'' bytes - (typically 32 |
| 565 | bits). Consequently, for 64 bit targets, the upper 32 bits of an |
| 566 | address was never sent. Since fixing this bug may cause a break in |
| 567 | some remote targets this variable is principly provided to |
| 568 | facilitate backward compatibility. */ |
| 569 | |
| 570 | static int remote_address_size; |
| 571 | |
| 572 | /* Temporary to track who currently owns the terminal. See |
| 573 | remote_terminal_* for more details. */ |
| 574 | |
| 575 | static int remote_async_terminal_ours_p; |
| 576 | |
| 577 | /* The executable file to use for "run" on the remote side. */ |
| 578 | |
| 579 | static char *remote_exec_file = ""; |
| 580 | |
| 581 | \f |
| 582 | /* User configurable variables for the number of characters in a |
| 583 | memory read/write packet. MIN (rsa->remote_packet_size, |
| 584 | rsa->sizeof_g_packet) is the default. Some targets need smaller |
| 585 | values (fifo overruns, et.al.) and some users need larger values |
| 586 | (speed up transfers). The variables ``preferred_*'' (the user |
| 587 | request), ``current_*'' (what was actually set) and ``forced_*'' |
| 588 | (Positive - a soft limit, negative - a hard limit). */ |
| 589 | |
| 590 | struct memory_packet_config |
| 591 | { |
| 592 | char *name; |
| 593 | long size; |
| 594 | int fixed_p; |
| 595 | }; |
| 596 | |
| 597 | /* Compute the current size of a read/write packet. Since this makes |
| 598 | use of ``actual_register_packet_size'' the computation is dynamic. */ |
| 599 | |
| 600 | static long |
| 601 | get_memory_packet_size (struct memory_packet_config *config) |
| 602 | { |
| 603 | struct remote_state *rs = get_remote_state (); |
| 604 | struct remote_arch_state *rsa = get_remote_arch_state (); |
| 605 | |
| 606 | /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk |
| 607 | law?) that some hosts don't cope very well with large alloca() |
| 608 | calls. Eventually the alloca() code will be replaced by calls to |
| 609 | xmalloc() and make_cleanups() allowing this restriction to either |
| 610 | be lifted or removed. */ |
| 611 | #ifndef MAX_REMOTE_PACKET_SIZE |
| 612 | #define MAX_REMOTE_PACKET_SIZE 16384 |
| 613 | #endif |
| 614 | /* NOTE: 20 ensures we can write at least one byte. */ |
| 615 | #ifndef MIN_REMOTE_PACKET_SIZE |
| 616 | #define MIN_REMOTE_PACKET_SIZE 20 |
| 617 | #endif |
| 618 | long what_they_get; |
| 619 | if (config->fixed_p) |
| 620 | { |
| 621 | if (config->size <= 0) |
| 622 | what_they_get = MAX_REMOTE_PACKET_SIZE; |
| 623 | else |
| 624 | what_they_get = config->size; |
| 625 | } |
| 626 | else |
| 627 | { |
| 628 | what_they_get = get_remote_packet_size (); |
| 629 | /* Limit the packet to the size specified by the user. */ |
| 630 | if (config->size > 0 |
| 631 | && what_they_get > config->size) |
| 632 | what_they_get = config->size; |
| 633 | |
| 634 | /* Limit it to the size of the targets ``g'' response unless we have |
| 635 | permission from the stub to use a larger packet size. */ |
| 636 | if (rs->explicit_packet_size == 0 |
| 637 | && rsa->actual_register_packet_size > 0 |
| 638 | && what_they_get > rsa->actual_register_packet_size) |
| 639 | what_they_get = rsa->actual_register_packet_size; |
| 640 | } |
| 641 | if (what_they_get > MAX_REMOTE_PACKET_SIZE) |
| 642 | what_they_get = MAX_REMOTE_PACKET_SIZE; |
| 643 | if (what_they_get < MIN_REMOTE_PACKET_SIZE) |
| 644 | what_they_get = MIN_REMOTE_PACKET_SIZE; |
| 645 | |
| 646 | /* Make sure there is room in the global buffer for this packet |
| 647 | (including its trailing NUL byte). */ |
| 648 | if (rs->buf_size < what_they_get + 1) |
| 649 | { |
| 650 | rs->buf_size = 2 * what_they_get; |
| 651 | rs->buf = xrealloc (rs->buf, 2 * what_they_get); |
| 652 | } |
| 653 | |
| 654 | return what_they_get; |
| 655 | } |
| 656 | |
| 657 | /* Update the size of a read/write packet. If they user wants |
| 658 | something really big then do a sanity check. */ |
| 659 | |
| 660 | static void |
| 661 | set_memory_packet_size (char *args, struct memory_packet_config *config) |
| 662 | { |
| 663 | int fixed_p = config->fixed_p; |
| 664 | long size = config->size; |
| 665 | if (args == NULL) |
| 666 | error (_("Argument required (integer, `fixed' or `limited').")); |
| 667 | else if (strcmp (args, "hard") == 0 |
| 668 | || strcmp (args, "fixed") == 0) |
| 669 | fixed_p = 1; |
| 670 | else if (strcmp (args, "soft") == 0 |
| 671 | || strcmp (args, "limit") == 0) |
| 672 | fixed_p = 0; |
| 673 | else |
| 674 | { |
| 675 | char *end; |
| 676 | size = strtoul (args, &end, 0); |
| 677 | if (args == end) |
| 678 | error (_("Invalid %s (bad syntax)."), config->name); |
| 679 | #if 0 |
| 680 | /* Instead of explicitly capping the size of a packet to |
| 681 | MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is |
| 682 | instead allowed to set the size to something arbitrarily |
| 683 | large. */ |
| 684 | if (size > MAX_REMOTE_PACKET_SIZE) |
| 685 | error (_("Invalid %s (too large)."), config->name); |
| 686 | #endif |
| 687 | } |
| 688 | /* Extra checks? */ |
| 689 | if (fixed_p && !config->fixed_p) |
| 690 | { |
| 691 | if (! query (_("The target may not be able to correctly handle a %s\n" |
| 692 | "of %ld bytes. Change the packet size? "), |
| 693 | config->name, size)) |
| 694 | error (_("Packet size not changed.")); |
| 695 | } |
| 696 | /* Update the config. */ |
| 697 | config->fixed_p = fixed_p; |
| 698 | config->size = size; |
| 699 | } |
| 700 | |
| 701 | static void |
| 702 | show_memory_packet_size (struct memory_packet_config *config) |
| 703 | { |
| 704 | printf_filtered (_("The %s is %ld. "), config->name, config->size); |
| 705 | if (config->fixed_p) |
| 706 | printf_filtered (_("Packets are fixed at %ld bytes.\n"), |
| 707 | get_memory_packet_size (config)); |
| 708 | else |
| 709 | printf_filtered (_("Packets are limited to %ld bytes.\n"), |
| 710 | get_memory_packet_size (config)); |
| 711 | } |
| 712 | |
| 713 | static struct memory_packet_config memory_write_packet_config = |
| 714 | { |
| 715 | "memory-write-packet-size", |
| 716 | }; |
| 717 | |
| 718 | static void |
| 719 | set_memory_write_packet_size (char *args, int from_tty) |
| 720 | { |
| 721 | set_memory_packet_size (args, &memory_write_packet_config); |
| 722 | } |
| 723 | |
| 724 | static void |
| 725 | show_memory_write_packet_size (char *args, int from_tty) |
| 726 | { |
| 727 | show_memory_packet_size (&memory_write_packet_config); |
| 728 | } |
| 729 | |
| 730 | static long |
| 731 | get_memory_write_packet_size (void) |
| 732 | { |
| 733 | return get_memory_packet_size (&memory_write_packet_config); |
| 734 | } |
| 735 | |
| 736 | static struct memory_packet_config memory_read_packet_config = |
| 737 | { |
| 738 | "memory-read-packet-size", |
| 739 | }; |
| 740 | |
| 741 | static void |
| 742 | set_memory_read_packet_size (char *args, int from_tty) |
| 743 | { |
| 744 | set_memory_packet_size (args, &memory_read_packet_config); |
| 745 | } |
| 746 | |
| 747 | static void |
| 748 | show_memory_read_packet_size (char *args, int from_tty) |
| 749 | { |
| 750 | show_memory_packet_size (&memory_read_packet_config); |
| 751 | } |
| 752 | |
| 753 | static long |
| 754 | get_memory_read_packet_size (void) |
| 755 | { |
| 756 | long size = get_memory_packet_size (&memory_read_packet_config); |
| 757 | /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an |
| 758 | extra buffer size argument before the memory read size can be |
| 759 | increased beyond this. */ |
| 760 | if (size > get_remote_packet_size ()) |
| 761 | size = get_remote_packet_size (); |
| 762 | return size; |
| 763 | } |
| 764 | |
| 765 | \f |
| 766 | /* Generic configuration support for packets the stub optionally |
| 767 | supports. Allows the user to specify the use of the packet as well |
| 768 | as allowing GDB to auto-detect support in the remote stub. */ |
| 769 | |
| 770 | enum packet_support |
| 771 | { |
| 772 | PACKET_SUPPORT_UNKNOWN = 0, |
| 773 | PACKET_ENABLE, |
| 774 | PACKET_DISABLE |
| 775 | }; |
| 776 | |
| 777 | struct packet_config |
| 778 | { |
| 779 | const char *name; |
| 780 | const char *title; |
| 781 | enum auto_boolean detect; |
| 782 | enum packet_support support; |
| 783 | }; |
| 784 | |
| 785 | /* Analyze a packet's return value and update the packet config |
| 786 | accordingly. */ |
| 787 | |
| 788 | enum packet_result |
| 789 | { |
| 790 | PACKET_ERROR, |
| 791 | PACKET_OK, |
| 792 | PACKET_UNKNOWN |
| 793 | }; |
| 794 | |
| 795 | static void |
| 796 | update_packet_config (struct packet_config *config) |
| 797 | { |
| 798 | switch (config->detect) |
| 799 | { |
| 800 | case AUTO_BOOLEAN_TRUE: |
| 801 | config->support = PACKET_ENABLE; |
| 802 | break; |
| 803 | case AUTO_BOOLEAN_FALSE: |
| 804 | config->support = PACKET_DISABLE; |
| 805 | break; |
| 806 | case AUTO_BOOLEAN_AUTO: |
| 807 | config->support = PACKET_SUPPORT_UNKNOWN; |
| 808 | break; |
| 809 | } |
| 810 | } |
| 811 | |
| 812 | static void |
| 813 | show_packet_config_cmd (struct packet_config *config) |
| 814 | { |
| 815 | char *support = "internal-error"; |
| 816 | switch (config->support) |
| 817 | { |
| 818 | case PACKET_ENABLE: |
| 819 | support = "enabled"; |
| 820 | break; |
| 821 | case PACKET_DISABLE: |
| 822 | support = "disabled"; |
| 823 | break; |
| 824 | case PACKET_SUPPORT_UNKNOWN: |
| 825 | support = "unknown"; |
| 826 | break; |
| 827 | } |
| 828 | switch (config->detect) |
| 829 | { |
| 830 | case AUTO_BOOLEAN_AUTO: |
| 831 | printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"), |
| 832 | config->name, support); |
| 833 | break; |
| 834 | case AUTO_BOOLEAN_TRUE: |
| 835 | case AUTO_BOOLEAN_FALSE: |
| 836 | printf_filtered (_("Support for the `%s' packet is currently %s.\n"), |
| 837 | config->name, support); |
| 838 | break; |
| 839 | } |
| 840 | } |
| 841 | |
| 842 | static void |
| 843 | add_packet_config_cmd (struct packet_config *config, const char *name, |
| 844 | const char *title, int legacy) |
| 845 | { |
| 846 | char *set_doc; |
| 847 | char *show_doc; |
| 848 | char *cmd_name; |
| 849 | |
| 850 | config->name = name; |
| 851 | config->title = title; |
| 852 | config->detect = AUTO_BOOLEAN_AUTO; |
| 853 | config->support = PACKET_SUPPORT_UNKNOWN; |
| 854 | set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet", |
| 855 | name, title); |
| 856 | show_doc = xstrprintf ("Show current use of remote protocol `%s' (%s) packet", |
| 857 | name, title); |
| 858 | /* set/show TITLE-packet {auto,on,off} */ |
| 859 | cmd_name = xstrprintf ("%s-packet", title); |
| 860 | add_setshow_auto_boolean_cmd (cmd_name, class_obscure, |
| 861 | &config->detect, set_doc, show_doc, NULL, /* help_doc */ |
| 862 | set_remote_protocol_packet_cmd, |
| 863 | show_remote_protocol_packet_cmd, |
| 864 | &remote_set_cmdlist, &remote_show_cmdlist); |
| 865 | /* set/show remote NAME-packet {auto,on,off} -- legacy. */ |
| 866 | if (legacy) |
| 867 | { |
| 868 | char *legacy_name; |
| 869 | legacy_name = xstrprintf ("%s-packet", name); |
| 870 | add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, |
| 871 | &remote_set_cmdlist); |
| 872 | add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, |
| 873 | &remote_show_cmdlist); |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | static enum packet_result |
| 878 | packet_check_result (const char *buf) |
| 879 | { |
| 880 | if (buf[0] != '\0') |
| 881 | { |
| 882 | /* The stub recognized the packet request. Check that the |
| 883 | operation succeeded. */ |
| 884 | if (buf[0] == 'E' |
| 885 | && isxdigit (buf[1]) && isxdigit (buf[2]) |
| 886 | && buf[3] == '\0') |
| 887 | /* "Enn" - definitly an error. */ |
| 888 | return PACKET_ERROR; |
| 889 | |
| 890 | /* Always treat "E." as an error. This will be used for |
| 891 | more verbose error messages, such as E.memtypes. */ |
| 892 | if (buf[0] == 'E' && buf[1] == '.') |
| 893 | return PACKET_ERROR; |
| 894 | |
| 895 | /* The packet may or may not be OK. Just assume it is. */ |
| 896 | return PACKET_OK; |
| 897 | } |
| 898 | else |
| 899 | /* The stub does not support the packet. */ |
| 900 | return PACKET_UNKNOWN; |
| 901 | } |
| 902 | |
| 903 | static enum packet_result |
| 904 | packet_ok (const char *buf, struct packet_config *config) |
| 905 | { |
| 906 | enum packet_result result; |
| 907 | |
| 908 | result = packet_check_result (buf); |
| 909 | switch (result) |
| 910 | { |
| 911 | case PACKET_OK: |
| 912 | case PACKET_ERROR: |
| 913 | /* The stub recognized the packet request. */ |
| 914 | switch (config->support) |
| 915 | { |
| 916 | case PACKET_SUPPORT_UNKNOWN: |
| 917 | if (remote_debug) |
| 918 | fprintf_unfiltered (gdb_stdlog, |
| 919 | "Packet %s (%s) is supported\n", |
| 920 | config->name, config->title); |
| 921 | config->support = PACKET_ENABLE; |
| 922 | break; |
| 923 | case PACKET_DISABLE: |
| 924 | internal_error (__FILE__, __LINE__, |
| 925 | _("packet_ok: attempt to use a disabled packet")); |
| 926 | break; |
| 927 | case PACKET_ENABLE: |
| 928 | break; |
| 929 | } |
| 930 | break; |
| 931 | case PACKET_UNKNOWN: |
| 932 | /* The stub does not support the packet. */ |
| 933 | switch (config->support) |
| 934 | { |
| 935 | case PACKET_ENABLE: |
| 936 | if (config->detect == AUTO_BOOLEAN_AUTO) |
| 937 | /* If the stub previously indicated that the packet was |
| 938 | supported then there is a protocol error.. */ |
| 939 | error (_("Protocol error: %s (%s) conflicting enabled responses."), |
| 940 | config->name, config->title); |
| 941 | else |
| 942 | /* The user set it wrong. */ |
| 943 | error (_("Enabled packet %s (%s) not recognized by stub"), |
| 944 | config->name, config->title); |
| 945 | break; |
| 946 | case PACKET_SUPPORT_UNKNOWN: |
| 947 | if (remote_debug) |
| 948 | fprintf_unfiltered (gdb_stdlog, |
| 949 | "Packet %s (%s) is NOT supported\n", |
| 950 | config->name, config->title); |
| 951 | config->support = PACKET_DISABLE; |
| 952 | break; |
| 953 | case PACKET_DISABLE: |
| 954 | break; |
| 955 | } |
| 956 | break; |
| 957 | } |
| 958 | |
| 959 | return result; |
| 960 | } |
| 961 | |
| 962 | enum { |
| 963 | PACKET_vCont = 0, |
| 964 | PACKET_X, |
| 965 | PACKET_qSymbol, |
| 966 | PACKET_P, |
| 967 | PACKET_p, |
| 968 | PACKET_Z0, |
| 969 | PACKET_Z1, |
| 970 | PACKET_Z2, |
| 971 | PACKET_Z3, |
| 972 | PACKET_Z4, |
| 973 | PACKET_vFile_open, |
| 974 | PACKET_vFile_pread, |
| 975 | PACKET_vFile_pwrite, |
| 976 | PACKET_vFile_close, |
| 977 | PACKET_vFile_unlink, |
| 978 | PACKET_qXfer_auxv, |
| 979 | PACKET_qXfer_features, |
| 980 | PACKET_qXfer_libraries, |
| 981 | PACKET_qXfer_memory_map, |
| 982 | PACKET_qXfer_spu_read, |
| 983 | PACKET_qXfer_spu_write, |
| 984 | PACKET_qXfer_osdata, |
| 985 | PACKET_qGetTLSAddr, |
| 986 | PACKET_qSupported, |
| 987 | PACKET_QPassSignals, |
| 988 | PACKET_qSearch_memory, |
| 989 | PACKET_vAttach, |
| 990 | PACKET_vRun, |
| 991 | PACKET_QStartNoAckMode, |
| 992 | PACKET_vKill, |
| 993 | PACKET_qXfer_siginfo_read, |
| 994 | PACKET_qXfer_siginfo_write, |
| 995 | PACKET_qAttached, |
| 996 | PACKET_MAX |
| 997 | }; |
| 998 | |
| 999 | static struct packet_config remote_protocol_packets[PACKET_MAX]; |
| 1000 | |
| 1001 | static void |
| 1002 | set_remote_protocol_packet_cmd (char *args, int from_tty, |
| 1003 | struct cmd_list_element *c) |
| 1004 | { |
| 1005 | struct packet_config *packet; |
| 1006 | |
| 1007 | for (packet = remote_protocol_packets; |
| 1008 | packet < &remote_protocol_packets[PACKET_MAX]; |
| 1009 | packet++) |
| 1010 | { |
| 1011 | if (&packet->detect == c->var) |
| 1012 | { |
| 1013 | update_packet_config (packet); |
| 1014 | return; |
| 1015 | } |
| 1016 | } |
| 1017 | internal_error (__FILE__, __LINE__, "Could not find config for %s", |
| 1018 | c->name); |
| 1019 | } |
| 1020 | |
| 1021 | static void |
| 1022 | show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty, |
| 1023 | struct cmd_list_element *c, |
| 1024 | const char *value) |
| 1025 | { |
| 1026 | struct packet_config *packet; |
| 1027 | |
| 1028 | for (packet = remote_protocol_packets; |
| 1029 | packet < &remote_protocol_packets[PACKET_MAX]; |
| 1030 | packet++) |
| 1031 | { |
| 1032 | if (&packet->detect == c->var) |
| 1033 | { |
| 1034 | show_packet_config_cmd (packet); |
| 1035 | return; |
| 1036 | } |
| 1037 | } |
| 1038 | internal_error (__FILE__, __LINE__, "Could not find config for %s", |
| 1039 | c->name); |
| 1040 | } |
| 1041 | |
| 1042 | /* Should we try one of the 'Z' requests? */ |
| 1043 | |
| 1044 | enum Z_packet_type |
| 1045 | { |
| 1046 | Z_PACKET_SOFTWARE_BP, |
| 1047 | Z_PACKET_HARDWARE_BP, |
| 1048 | Z_PACKET_WRITE_WP, |
| 1049 | Z_PACKET_READ_WP, |
| 1050 | Z_PACKET_ACCESS_WP, |
| 1051 | NR_Z_PACKET_TYPES |
| 1052 | }; |
| 1053 | |
| 1054 | /* For compatibility with older distributions. Provide a ``set remote |
| 1055 | Z-packet ...'' command that updates all the Z packet types. */ |
| 1056 | |
| 1057 | static enum auto_boolean remote_Z_packet_detect; |
| 1058 | |
| 1059 | static void |
| 1060 | set_remote_protocol_Z_packet_cmd (char *args, int from_tty, |
| 1061 | struct cmd_list_element *c) |
| 1062 | { |
| 1063 | int i; |
| 1064 | for (i = 0; i < NR_Z_PACKET_TYPES; i++) |
| 1065 | { |
| 1066 | remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect; |
| 1067 | update_packet_config (&remote_protocol_packets[PACKET_Z0 + i]); |
| 1068 | } |
| 1069 | } |
| 1070 | |
| 1071 | static void |
| 1072 | show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty, |
| 1073 | struct cmd_list_element *c, |
| 1074 | const char *value) |
| 1075 | { |
| 1076 | int i; |
| 1077 | for (i = 0; i < NR_Z_PACKET_TYPES; i++) |
| 1078 | { |
| 1079 | show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]); |
| 1080 | } |
| 1081 | } |
| 1082 | |
| 1083 | /* Should we try the 'ThreadInfo' query packet? |
| 1084 | |
| 1085 | This variable (NOT available to the user: auto-detect only!) |
| 1086 | determines whether GDB will use the new, simpler "ThreadInfo" |
| 1087 | query or the older, more complex syntax for thread queries. |
| 1088 | This is an auto-detect variable (set to true at each connect, |
| 1089 | and set to false when the target fails to recognize it). */ |
| 1090 | |
| 1091 | static int use_threadinfo_query; |
| 1092 | static int use_threadextra_query; |
| 1093 | |
| 1094 | /* Tokens for use by the asynchronous signal handlers for SIGINT. */ |
| 1095 | static struct async_signal_handler *sigint_remote_twice_token; |
| 1096 | static struct async_signal_handler *sigint_remote_token; |
| 1097 | |
| 1098 | \f |
| 1099 | /* Asynchronous signal handle registered as event loop source for |
| 1100 | when we have pending events ready to be passed to the core. */ |
| 1101 | |
| 1102 | static struct async_event_handler *remote_async_inferior_event_token; |
| 1103 | |
| 1104 | /* Asynchronous signal handle registered as event loop source for when |
| 1105 | the remote sent us a %Stop notification. The registered callback |
| 1106 | will do a vStopped sequence to pull the rest of the events out of |
| 1107 | the remote side into our event queue. */ |
| 1108 | |
| 1109 | static struct async_event_handler *remote_async_get_pending_events_token; |
| 1110 | \f |
| 1111 | |
| 1112 | static ptid_t magic_null_ptid; |
| 1113 | static ptid_t not_sent_ptid; |
| 1114 | static ptid_t any_thread_ptid; |
| 1115 | |
| 1116 | /* These are the threads which we last sent to the remote system. The |
| 1117 | TID member will be -1 for all or -2 for not sent yet. */ |
| 1118 | |
| 1119 | static ptid_t general_thread; |
| 1120 | static ptid_t continue_thread; |
| 1121 | |
| 1122 | /* Find out if the stub attached to PID (and hence GDB should offer to |
| 1123 | detach instead of killing it when bailing out). */ |
| 1124 | |
| 1125 | static int |
| 1126 | remote_query_attached (int pid) |
| 1127 | { |
| 1128 | struct remote_state *rs = get_remote_state (); |
| 1129 | |
| 1130 | if (remote_protocol_packets[PACKET_qAttached].support == PACKET_DISABLE) |
| 1131 | return 0; |
| 1132 | |
| 1133 | if (remote_multi_process_p (rs)) |
| 1134 | sprintf (rs->buf, "qAttached:%x", pid); |
| 1135 | else |
| 1136 | sprintf (rs->buf, "qAttached"); |
| 1137 | |
| 1138 | putpkt (rs->buf); |
| 1139 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 1140 | |
| 1141 | switch (packet_ok (rs->buf, |
| 1142 | &remote_protocol_packets[PACKET_qAttached])) |
| 1143 | { |
| 1144 | case PACKET_OK: |
| 1145 | if (strcmp (rs->buf, "1") == 0) |
| 1146 | return 1; |
| 1147 | break; |
| 1148 | case PACKET_ERROR: |
| 1149 | warning (_("Remote failure reply: %s"), rs->buf); |
| 1150 | break; |
| 1151 | case PACKET_UNKNOWN: |
| 1152 | break; |
| 1153 | } |
| 1154 | |
| 1155 | return 0; |
| 1156 | } |
| 1157 | |
| 1158 | /* Add PID to GDB's inferior table. Since we can be connected to a |
| 1159 | remote system before before knowing about any inferior, mark the |
| 1160 | target with execution when we find the first inferior. If ATTACHED |
| 1161 | is 1, then we had just attached to this inferior. If it is 0, then |
| 1162 | we just created this inferior. If it is -1, then try querying the |
| 1163 | remote stub to find out if it had attached to the inferior or |
| 1164 | not. */ |
| 1165 | |
| 1166 | static struct inferior * |
| 1167 | remote_add_inferior (int pid, int attached) |
| 1168 | { |
| 1169 | struct remote_state *rs = get_remote_state (); |
| 1170 | struct inferior *inf; |
| 1171 | |
| 1172 | /* Check whether this process we're learning about is to be |
| 1173 | considered attached, or if is to be considered to have been |
| 1174 | spawned by the stub. */ |
| 1175 | if (attached == -1) |
| 1176 | attached = remote_query_attached (pid); |
| 1177 | |
| 1178 | inf = add_inferior (pid); |
| 1179 | |
| 1180 | inf->attach_flag = attached; |
| 1181 | |
| 1182 | /* This may be the first inferior we hear about. */ |
| 1183 | if (!target_has_execution) |
| 1184 | { |
| 1185 | if (rs->extended) |
| 1186 | target_mark_running (&extended_remote_ops); |
| 1187 | else |
| 1188 | target_mark_running (&remote_ops); |
| 1189 | } |
| 1190 | |
| 1191 | return inf; |
| 1192 | } |
| 1193 | |
| 1194 | /* Add thread PTID to GDB's thread list. Tag it as executing/running |
| 1195 | according to RUNNING. */ |
| 1196 | |
| 1197 | static void |
| 1198 | remote_add_thread (ptid_t ptid, int running) |
| 1199 | { |
| 1200 | add_thread (ptid); |
| 1201 | |
| 1202 | set_executing (ptid, running); |
| 1203 | set_running (ptid, running); |
| 1204 | } |
| 1205 | |
| 1206 | /* Come here when we learn about a thread id from the remote target. |
| 1207 | It may be the first time we hear about such thread, so take the |
| 1208 | opportunity to add it to GDB's thread list. In case this is the |
| 1209 | first time we're noticing its corresponding inferior, add it to |
| 1210 | GDB's inferior list as well. */ |
| 1211 | |
| 1212 | static void |
| 1213 | remote_notice_new_inferior (ptid_t currthread, int running) |
| 1214 | { |
| 1215 | struct remote_state *rs = get_remote_state (); |
| 1216 | |
| 1217 | /* If this is a new thread, add it to GDB's thread list. |
| 1218 | If we leave it up to WFI to do this, bad things will happen. */ |
| 1219 | |
| 1220 | if (in_thread_list (currthread) && is_exited (currthread)) |
| 1221 | { |
| 1222 | /* We're seeing an event on a thread id we knew had exited. |
| 1223 | This has to be a new thread reusing the old id. Add it. */ |
| 1224 | remote_add_thread (currthread, running); |
| 1225 | return; |
| 1226 | } |
| 1227 | |
| 1228 | if (!in_thread_list (currthread)) |
| 1229 | { |
| 1230 | struct inferior *inf = NULL; |
| 1231 | int pid = ptid_get_pid (currthread); |
| 1232 | |
| 1233 | if (ptid_is_pid (inferior_ptid) |
| 1234 | && pid == ptid_get_pid (inferior_ptid)) |
| 1235 | { |
| 1236 | /* inferior_ptid has no thread member yet. This can happen |
| 1237 | with the vAttach -> remote_wait,"TAAthread:" path if the |
| 1238 | stub doesn't support qC. This is the first stop reported |
| 1239 | after an attach, so this is the main thread. Update the |
| 1240 | ptid in the thread list. */ |
| 1241 | if (in_thread_list (pid_to_ptid (pid))) |
| 1242 | thread_change_ptid (inferior_ptid, currthread); |
| 1243 | else |
| 1244 | { |
| 1245 | remote_add_thread (currthread, running); |
| 1246 | inferior_ptid = currthread; |
| 1247 | } |
| 1248 | return; |
| 1249 | } |
| 1250 | |
| 1251 | if (ptid_equal (magic_null_ptid, inferior_ptid)) |
| 1252 | { |
| 1253 | /* inferior_ptid is not set yet. This can happen with the |
| 1254 | vRun -> remote_wait,"TAAthread:" path if the stub |
| 1255 | doesn't support qC. This is the first stop reported |
| 1256 | after an attach, so this is the main thread. Update the |
| 1257 | ptid in the thread list. */ |
| 1258 | thread_change_ptid (inferior_ptid, currthread); |
| 1259 | return; |
| 1260 | } |
| 1261 | |
| 1262 | /* When connecting to a target remote, or to a target |
| 1263 | extended-remote which already was debugging an inferior, we |
| 1264 | may not know about it yet. Add it before adding its child |
| 1265 | thread, so notifications are emitted in a sensible order. */ |
| 1266 | if (!in_inferior_list (ptid_get_pid (currthread))) |
| 1267 | inf = remote_add_inferior (ptid_get_pid (currthread), -1); |
| 1268 | |
| 1269 | /* This is really a new thread. Add it. */ |
| 1270 | remote_add_thread (currthread, running); |
| 1271 | |
| 1272 | /* If we found a new inferior, let the common code do whatever |
| 1273 | it needs to with it (e.g., read shared libraries, insert |
| 1274 | breakpoints). */ |
| 1275 | if (inf != NULL) |
| 1276 | notice_new_inferior (currthread, running, 0); |
| 1277 | } |
| 1278 | } |
| 1279 | |
| 1280 | /* Call this function as a result of |
| 1281 | 1) A halt indication (T packet) containing a thread id |
| 1282 | 2) A direct query of currthread |
| 1283 | 3) Successful execution of set thread |
| 1284 | */ |
| 1285 | |
| 1286 | static void |
| 1287 | record_currthread (ptid_t currthread) |
| 1288 | { |
| 1289 | general_thread = currthread; |
| 1290 | |
| 1291 | if (ptid_equal (currthread, minus_one_ptid)) |
| 1292 | /* We're just invalidating the local thread mirror. */ |
| 1293 | return; |
| 1294 | |
| 1295 | remote_notice_new_inferior (currthread, 0); |
| 1296 | } |
| 1297 | |
| 1298 | static char *last_pass_packet; |
| 1299 | |
| 1300 | /* If 'QPassSignals' is supported, tell the remote stub what signals |
| 1301 | it can simply pass through to the inferior without reporting. */ |
| 1302 | |
| 1303 | static void |
| 1304 | remote_pass_signals (void) |
| 1305 | { |
| 1306 | if (remote_protocol_packets[PACKET_QPassSignals].support != PACKET_DISABLE) |
| 1307 | { |
| 1308 | char *pass_packet, *p; |
| 1309 | int numsigs = (int) TARGET_SIGNAL_LAST; |
| 1310 | int count = 0, i; |
| 1311 | |
| 1312 | gdb_assert (numsigs < 256); |
| 1313 | for (i = 0; i < numsigs; i++) |
| 1314 | { |
| 1315 | if (signal_stop_state (i) == 0 |
| 1316 | && signal_print_state (i) == 0 |
| 1317 | && signal_pass_state (i) == 1) |
| 1318 | count++; |
| 1319 | } |
| 1320 | pass_packet = xmalloc (count * 3 + strlen ("QPassSignals:") + 1); |
| 1321 | strcpy (pass_packet, "QPassSignals:"); |
| 1322 | p = pass_packet + strlen (pass_packet); |
| 1323 | for (i = 0; i < numsigs; i++) |
| 1324 | { |
| 1325 | if (signal_stop_state (i) == 0 |
| 1326 | && signal_print_state (i) == 0 |
| 1327 | && signal_pass_state (i) == 1) |
| 1328 | { |
| 1329 | if (i >= 16) |
| 1330 | *p++ = tohex (i >> 4); |
| 1331 | *p++ = tohex (i & 15); |
| 1332 | if (count) |
| 1333 | *p++ = ';'; |
| 1334 | else |
| 1335 | break; |
| 1336 | count--; |
| 1337 | } |
| 1338 | } |
| 1339 | *p = 0; |
| 1340 | if (!last_pass_packet || strcmp (last_pass_packet, pass_packet)) |
| 1341 | { |
| 1342 | struct remote_state *rs = get_remote_state (); |
| 1343 | char *buf = rs->buf; |
| 1344 | |
| 1345 | putpkt (pass_packet); |
| 1346 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 1347 | packet_ok (buf, &remote_protocol_packets[PACKET_QPassSignals]); |
| 1348 | if (last_pass_packet) |
| 1349 | xfree (last_pass_packet); |
| 1350 | last_pass_packet = pass_packet; |
| 1351 | } |
| 1352 | else |
| 1353 | xfree (pass_packet); |
| 1354 | } |
| 1355 | } |
| 1356 | |
| 1357 | /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is |
| 1358 | MINUS_ONE_PTID, set the thread to -1, so the stub returns the |
| 1359 | thread. If GEN is set, set the general thread, if not, then set |
| 1360 | the step/continue thread. */ |
| 1361 | static void |
| 1362 | set_thread (struct ptid ptid, int gen) |
| 1363 | { |
| 1364 | struct remote_state *rs = get_remote_state (); |
| 1365 | ptid_t state = gen ? general_thread : continue_thread; |
| 1366 | char *buf = rs->buf; |
| 1367 | char *endbuf = rs->buf + get_remote_packet_size (); |
| 1368 | |
| 1369 | if (ptid_equal (state, ptid)) |
| 1370 | return; |
| 1371 | |
| 1372 | *buf++ = 'H'; |
| 1373 | *buf++ = gen ? 'g' : 'c'; |
| 1374 | if (ptid_equal (ptid, magic_null_ptid)) |
| 1375 | xsnprintf (buf, endbuf - buf, "0"); |
| 1376 | else if (ptid_equal (ptid, any_thread_ptid)) |
| 1377 | xsnprintf (buf, endbuf - buf, "0"); |
| 1378 | else if (ptid_equal (ptid, minus_one_ptid)) |
| 1379 | xsnprintf (buf, endbuf - buf, "-1"); |
| 1380 | else |
| 1381 | write_ptid (buf, endbuf, ptid); |
| 1382 | putpkt (rs->buf); |
| 1383 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 1384 | if (gen) |
| 1385 | general_thread = ptid; |
| 1386 | else |
| 1387 | continue_thread = ptid; |
| 1388 | } |
| 1389 | |
| 1390 | static void |
| 1391 | set_general_thread (struct ptid ptid) |
| 1392 | { |
| 1393 | set_thread (ptid, 1); |
| 1394 | } |
| 1395 | |
| 1396 | static void |
| 1397 | set_continue_thread (struct ptid ptid) |
| 1398 | { |
| 1399 | set_thread (ptid, 0); |
| 1400 | } |
| 1401 | |
| 1402 | /* Change the remote current process. Which thread within the process |
| 1403 | ends up selected isn't important, as long as it is the same process |
| 1404 | as what INFERIOR_PTID points to. |
| 1405 | |
| 1406 | This comes from that fact that there is no explicit notion of |
| 1407 | "selected process" in the protocol. The selected process for |
| 1408 | general operations is the process the selected general thread |
| 1409 | belongs to. */ |
| 1410 | |
| 1411 | static void |
| 1412 | set_general_process (void) |
| 1413 | { |
| 1414 | struct remote_state *rs = get_remote_state (); |
| 1415 | |
| 1416 | /* If the remote can't handle multiple processes, don't bother. */ |
| 1417 | if (!remote_multi_process_p (rs)) |
| 1418 | return; |
| 1419 | |
| 1420 | /* We only need to change the remote current thread if it's pointing |
| 1421 | at some other process. */ |
| 1422 | if (ptid_get_pid (general_thread) != ptid_get_pid (inferior_ptid)) |
| 1423 | set_general_thread (inferior_ptid); |
| 1424 | } |
| 1425 | |
| 1426 | \f |
| 1427 | /* Return nonzero if the thread PTID is still alive on the remote |
| 1428 | system. */ |
| 1429 | |
| 1430 | static int |
| 1431 | remote_thread_alive (struct target_ops *ops, ptid_t ptid) |
| 1432 | { |
| 1433 | struct remote_state *rs = get_remote_state (); |
| 1434 | int tid = ptid_get_tid (ptid); |
| 1435 | char *p, *endp; |
| 1436 | |
| 1437 | if (ptid_equal (ptid, magic_null_ptid)) |
| 1438 | /* The main thread is always alive. */ |
| 1439 | return 1; |
| 1440 | |
| 1441 | if (ptid_get_pid (ptid) != 0 && ptid_get_tid (ptid) == 0) |
| 1442 | /* The main thread is always alive. This can happen after a |
| 1443 | vAttach, if the remote side doesn't support |
| 1444 | multi-threading. */ |
| 1445 | return 1; |
| 1446 | |
| 1447 | p = rs->buf; |
| 1448 | endp = rs->buf + get_remote_packet_size (); |
| 1449 | |
| 1450 | *p++ = 'T'; |
| 1451 | write_ptid (p, endp, ptid); |
| 1452 | |
| 1453 | putpkt (rs->buf); |
| 1454 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 1455 | return (rs->buf[0] == 'O' && rs->buf[1] == 'K'); |
| 1456 | } |
| 1457 | |
| 1458 | /* About these extended threadlist and threadinfo packets. They are |
| 1459 | variable length packets but, the fields within them are often fixed |
| 1460 | length. They are redundent enough to send over UDP as is the |
| 1461 | remote protocol in general. There is a matching unit test module |
| 1462 | in libstub. */ |
| 1463 | |
| 1464 | #define OPAQUETHREADBYTES 8 |
| 1465 | |
| 1466 | /* a 64 bit opaque identifier */ |
| 1467 | typedef unsigned char threadref[OPAQUETHREADBYTES]; |
| 1468 | |
| 1469 | /* WARNING: This threadref data structure comes from the remote O.S., |
| 1470 | libstub protocol encoding, and remote.c. it is not particularly |
| 1471 | changable. */ |
| 1472 | |
| 1473 | /* Right now, the internal structure is int. We want it to be bigger. |
| 1474 | Plan to fix this. |
| 1475 | */ |
| 1476 | |
| 1477 | typedef int gdb_threadref; /* Internal GDB thread reference. */ |
| 1478 | |
| 1479 | /* gdb_ext_thread_info is an internal GDB data structure which is |
| 1480 | equivalent to the reply of the remote threadinfo packet. */ |
| 1481 | |
| 1482 | struct gdb_ext_thread_info |
| 1483 | { |
| 1484 | threadref threadid; /* External form of thread reference. */ |
| 1485 | int active; /* Has state interesting to GDB? |
| 1486 | regs, stack. */ |
| 1487 | char display[256]; /* Brief state display, name, |
| 1488 | blocked/suspended. */ |
| 1489 | char shortname[32]; /* To be used to name threads. */ |
| 1490 | char more_display[256]; /* Long info, statistics, queue depth, |
| 1491 | whatever. */ |
| 1492 | }; |
| 1493 | |
| 1494 | /* The volume of remote transfers can be limited by submitting |
| 1495 | a mask containing bits specifying the desired information. |
| 1496 | Use a union of these values as the 'selection' parameter to |
| 1497 | get_thread_info. FIXME: Make these TAG names more thread specific. |
| 1498 | */ |
| 1499 | |
| 1500 | #define TAG_THREADID 1 |
| 1501 | #define TAG_EXISTS 2 |
| 1502 | #define TAG_DISPLAY 4 |
| 1503 | #define TAG_THREADNAME 8 |
| 1504 | #define TAG_MOREDISPLAY 16 |
| 1505 | |
| 1506 | #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2) |
| 1507 | |
| 1508 | char *unpack_varlen_hex (char *buff, ULONGEST *result); |
| 1509 | |
| 1510 | static char *unpack_nibble (char *buf, int *val); |
| 1511 | |
| 1512 | static char *pack_nibble (char *buf, int nibble); |
| 1513 | |
| 1514 | static char *pack_hex_byte (char *pkt, int /* unsigned char */ byte); |
| 1515 | |
| 1516 | static char *unpack_byte (char *buf, int *value); |
| 1517 | |
| 1518 | static char *pack_int (char *buf, int value); |
| 1519 | |
| 1520 | static char *unpack_int (char *buf, int *value); |
| 1521 | |
| 1522 | static char *unpack_string (char *src, char *dest, int length); |
| 1523 | |
| 1524 | static char *pack_threadid (char *pkt, threadref *id); |
| 1525 | |
| 1526 | static char *unpack_threadid (char *inbuf, threadref *id); |
| 1527 | |
| 1528 | void int_to_threadref (threadref *id, int value); |
| 1529 | |
| 1530 | static int threadref_to_int (threadref *ref); |
| 1531 | |
| 1532 | static void copy_threadref (threadref *dest, threadref *src); |
| 1533 | |
| 1534 | static int threadmatch (threadref *dest, threadref *src); |
| 1535 | |
| 1536 | static char *pack_threadinfo_request (char *pkt, int mode, |
| 1537 | threadref *id); |
| 1538 | |
| 1539 | static int remote_unpack_thread_info_response (char *pkt, |
| 1540 | threadref *expectedref, |
| 1541 | struct gdb_ext_thread_info |
| 1542 | *info); |
| 1543 | |
| 1544 | |
| 1545 | static int remote_get_threadinfo (threadref *threadid, |
| 1546 | int fieldset, /*TAG mask */ |
| 1547 | struct gdb_ext_thread_info *info); |
| 1548 | |
| 1549 | static char *pack_threadlist_request (char *pkt, int startflag, |
| 1550 | int threadcount, |
| 1551 | threadref *nextthread); |
| 1552 | |
| 1553 | static int parse_threadlist_response (char *pkt, |
| 1554 | int result_limit, |
| 1555 | threadref *original_echo, |
| 1556 | threadref *resultlist, |
| 1557 | int *doneflag); |
| 1558 | |
| 1559 | static int remote_get_threadlist (int startflag, |
| 1560 | threadref *nextthread, |
| 1561 | int result_limit, |
| 1562 | int *done, |
| 1563 | int *result_count, |
| 1564 | threadref *threadlist); |
| 1565 | |
| 1566 | typedef int (*rmt_thread_action) (threadref *ref, void *context); |
| 1567 | |
| 1568 | static int remote_threadlist_iterator (rmt_thread_action stepfunction, |
| 1569 | void *context, int looplimit); |
| 1570 | |
| 1571 | static int remote_newthread_step (threadref *ref, void *context); |
| 1572 | |
| 1573 | |
| 1574 | /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the |
| 1575 | buffer we're allowed to write to. Returns |
| 1576 | BUF+CHARACTERS_WRITTEN. */ |
| 1577 | |
| 1578 | static char * |
| 1579 | write_ptid (char *buf, const char *endbuf, ptid_t ptid) |
| 1580 | { |
| 1581 | int pid, tid; |
| 1582 | struct remote_state *rs = get_remote_state (); |
| 1583 | |
| 1584 | if (remote_multi_process_p (rs)) |
| 1585 | { |
| 1586 | pid = ptid_get_pid (ptid); |
| 1587 | if (pid < 0) |
| 1588 | buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid); |
| 1589 | else |
| 1590 | buf += xsnprintf (buf, endbuf - buf, "p%x.", pid); |
| 1591 | } |
| 1592 | tid = ptid_get_tid (ptid); |
| 1593 | if (tid < 0) |
| 1594 | buf += xsnprintf (buf, endbuf - buf, "-%x", -tid); |
| 1595 | else |
| 1596 | buf += xsnprintf (buf, endbuf - buf, "%x", tid); |
| 1597 | |
| 1598 | return buf; |
| 1599 | } |
| 1600 | |
| 1601 | /* Extract a PTID from BUF. If non-null, OBUF is set to the to one |
| 1602 | passed the last parsed char. Returns null_ptid on error. */ |
| 1603 | |
| 1604 | static ptid_t |
| 1605 | read_ptid (char *buf, char **obuf) |
| 1606 | { |
| 1607 | char *p = buf; |
| 1608 | char *pp; |
| 1609 | ULONGEST pid = 0, tid = 0; |
| 1610 | ptid_t ptid; |
| 1611 | |
| 1612 | if (*p == 'p') |
| 1613 | { |
| 1614 | /* Multi-process ptid. */ |
| 1615 | pp = unpack_varlen_hex (p + 1, &pid); |
| 1616 | if (*pp != '.') |
| 1617 | error (_("invalid remote ptid: %s\n"), p); |
| 1618 | |
| 1619 | p = pp; |
| 1620 | pp = unpack_varlen_hex (p + 1, &tid); |
| 1621 | if (obuf) |
| 1622 | *obuf = pp; |
| 1623 | return ptid_build (pid, 0, tid); |
| 1624 | } |
| 1625 | |
| 1626 | /* No multi-process. Just a tid. */ |
| 1627 | pp = unpack_varlen_hex (p, &tid); |
| 1628 | |
| 1629 | /* Since the stub is not sending a process id, then default to |
| 1630 | what's in inferior_ptid, unless it's null at this point. If so, |
| 1631 | then since there's no way to know the pid of the reported |
| 1632 | threads, use the magic number. */ |
| 1633 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 1634 | pid = ptid_get_pid (magic_null_ptid); |
| 1635 | else |
| 1636 | pid = ptid_get_pid (inferior_ptid); |
| 1637 | |
| 1638 | if (obuf) |
| 1639 | *obuf = pp; |
| 1640 | return ptid_build (pid, 0, tid); |
| 1641 | } |
| 1642 | |
| 1643 | /* Encode 64 bits in 16 chars of hex. */ |
| 1644 | |
| 1645 | static const char hexchars[] = "0123456789abcdef"; |
| 1646 | |
| 1647 | static int |
| 1648 | ishex (int ch, int *val) |
| 1649 | { |
| 1650 | if ((ch >= 'a') && (ch <= 'f')) |
| 1651 | { |
| 1652 | *val = ch - 'a' + 10; |
| 1653 | return 1; |
| 1654 | } |
| 1655 | if ((ch >= 'A') && (ch <= 'F')) |
| 1656 | { |
| 1657 | *val = ch - 'A' + 10; |
| 1658 | return 1; |
| 1659 | } |
| 1660 | if ((ch >= '0') && (ch <= '9')) |
| 1661 | { |
| 1662 | *val = ch - '0'; |
| 1663 | return 1; |
| 1664 | } |
| 1665 | return 0; |
| 1666 | } |
| 1667 | |
| 1668 | static int |
| 1669 | stubhex (int ch) |
| 1670 | { |
| 1671 | if (ch >= 'a' && ch <= 'f') |
| 1672 | return ch - 'a' + 10; |
| 1673 | if (ch >= '0' && ch <= '9') |
| 1674 | return ch - '0'; |
| 1675 | if (ch >= 'A' && ch <= 'F') |
| 1676 | return ch - 'A' + 10; |
| 1677 | return -1; |
| 1678 | } |
| 1679 | |
| 1680 | static int |
| 1681 | stub_unpack_int (char *buff, int fieldlength) |
| 1682 | { |
| 1683 | int nibble; |
| 1684 | int retval = 0; |
| 1685 | |
| 1686 | while (fieldlength) |
| 1687 | { |
| 1688 | nibble = stubhex (*buff++); |
| 1689 | retval |= nibble; |
| 1690 | fieldlength--; |
| 1691 | if (fieldlength) |
| 1692 | retval = retval << 4; |
| 1693 | } |
| 1694 | return retval; |
| 1695 | } |
| 1696 | |
| 1697 | char * |
| 1698 | unpack_varlen_hex (char *buff, /* packet to parse */ |
| 1699 | ULONGEST *result) |
| 1700 | { |
| 1701 | int nibble; |
| 1702 | ULONGEST retval = 0; |
| 1703 | |
| 1704 | while (ishex (*buff, &nibble)) |
| 1705 | { |
| 1706 | buff++; |
| 1707 | retval = retval << 4; |
| 1708 | retval |= nibble & 0x0f; |
| 1709 | } |
| 1710 | *result = retval; |
| 1711 | return buff; |
| 1712 | } |
| 1713 | |
| 1714 | static char * |
| 1715 | unpack_nibble (char *buf, int *val) |
| 1716 | { |
| 1717 | *val = fromhex (*buf++); |
| 1718 | return buf; |
| 1719 | } |
| 1720 | |
| 1721 | static char * |
| 1722 | pack_nibble (char *buf, int nibble) |
| 1723 | { |
| 1724 | *buf++ = hexchars[(nibble & 0x0f)]; |
| 1725 | return buf; |
| 1726 | } |
| 1727 | |
| 1728 | static char * |
| 1729 | pack_hex_byte (char *pkt, int byte) |
| 1730 | { |
| 1731 | *pkt++ = hexchars[(byte >> 4) & 0xf]; |
| 1732 | *pkt++ = hexchars[(byte & 0xf)]; |
| 1733 | return pkt; |
| 1734 | } |
| 1735 | |
| 1736 | static char * |
| 1737 | unpack_byte (char *buf, int *value) |
| 1738 | { |
| 1739 | *value = stub_unpack_int (buf, 2); |
| 1740 | return buf + 2; |
| 1741 | } |
| 1742 | |
| 1743 | static char * |
| 1744 | pack_int (char *buf, int value) |
| 1745 | { |
| 1746 | buf = pack_hex_byte (buf, (value >> 24) & 0xff); |
| 1747 | buf = pack_hex_byte (buf, (value >> 16) & 0xff); |
| 1748 | buf = pack_hex_byte (buf, (value >> 8) & 0x0ff); |
| 1749 | buf = pack_hex_byte (buf, (value & 0xff)); |
| 1750 | return buf; |
| 1751 | } |
| 1752 | |
| 1753 | static char * |
| 1754 | unpack_int (char *buf, int *value) |
| 1755 | { |
| 1756 | *value = stub_unpack_int (buf, 8); |
| 1757 | return buf + 8; |
| 1758 | } |
| 1759 | |
| 1760 | #if 0 /* Currently unused, uncomment when needed. */ |
| 1761 | static char *pack_string (char *pkt, char *string); |
| 1762 | |
| 1763 | static char * |
| 1764 | pack_string (char *pkt, char *string) |
| 1765 | { |
| 1766 | char ch; |
| 1767 | int len; |
| 1768 | |
| 1769 | len = strlen (string); |
| 1770 | if (len > 200) |
| 1771 | len = 200; /* Bigger than most GDB packets, junk??? */ |
| 1772 | pkt = pack_hex_byte (pkt, len); |
| 1773 | while (len-- > 0) |
| 1774 | { |
| 1775 | ch = *string++; |
| 1776 | if ((ch == '\0') || (ch == '#')) |
| 1777 | ch = '*'; /* Protect encapsulation. */ |
| 1778 | *pkt++ = ch; |
| 1779 | } |
| 1780 | return pkt; |
| 1781 | } |
| 1782 | #endif /* 0 (unused) */ |
| 1783 | |
| 1784 | static char * |
| 1785 | unpack_string (char *src, char *dest, int length) |
| 1786 | { |
| 1787 | while (length--) |
| 1788 | *dest++ = *src++; |
| 1789 | *dest = '\0'; |
| 1790 | return src; |
| 1791 | } |
| 1792 | |
| 1793 | static char * |
| 1794 | pack_threadid (char *pkt, threadref *id) |
| 1795 | { |
| 1796 | char *limit; |
| 1797 | unsigned char *altid; |
| 1798 | |
| 1799 | altid = (unsigned char *) id; |
| 1800 | limit = pkt + BUF_THREAD_ID_SIZE; |
| 1801 | while (pkt < limit) |
| 1802 | pkt = pack_hex_byte (pkt, *altid++); |
| 1803 | return pkt; |
| 1804 | } |
| 1805 | |
| 1806 | |
| 1807 | static char * |
| 1808 | unpack_threadid (char *inbuf, threadref *id) |
| 1809 | { |
| 1810 | char *altref; |
| 1811 | char *limit = inbuf + BUF_THREAD_ID_SIZE; |
| 1812 | int x, y; |
| 1813 | |
| 1814 | altref = (char *) id; |
| 1815 | |
| 1816 | while (inbuf < limit) |
| 1817 | { |
| 1818 | x = stubhex (*inbuf++); |
| 1819 | y = stubhex (*inbuf++); |
| 1820 | *altref++ = (x << 4) | y; |
| 1821 | } |
| 1822 | return inbuf; |
| 1823 | } |
| 1824 | |
| 1825 | /* Externally, threadrefs are 64 bits but internally, they are still |
| 1826 | ints. This is due to a mismatch of specifications. We would like |
| 1827 | to use 64bit thread references internally. This is an adapter |
| 1828 | function. */ |
| 1829 | |
| 1830 | void |
| 1831 | int_to_threadref (threadref *id, int value) |
| 1832 | { |
| 1833 | unsigned char *scan; |
| 1834 | |
| 1835 | scan = (unsigned char *) id; |
| 1836 | { |
| 1837 | int i = 4; |
| 1838 | while (i--) |
| 1839 | *scan++ = 0; |
| 1840 | } |
| 1841 | *scan++ = (value >> 24) & 0xff; |
| 1842 | *scan++ = (value >> 16) & 0xff; |
| 1843 | *scan++ = (value >> 8) & 0xff; |
| 1844 | *scan++ = (value & 0xff); |
| 1845 | } |
| 1846 | |
| 1847 | static int |
| 1848 | threadref_to_int (threadref *ref) |
| 1849 | { |
| 1850 | int i, value = 0; |
| 1851 | unsigned char *scan; |
| 1852 | |
| 1853 | scan = *ref; |
| 1854 | scan += 4; |
| 1855 | i = 4; |
| 1856 | while (i-- > 0) |
| 1857 | value = (value << 8) | ((*scan++) & 0xff); |
| 1858 | return value; |
| 1859 | } |
| 1860 | |
| 1861 | static void |
| 1862 | copy_threadref (threadref *dest, threadref *src) |
| 1863 | { |
| 1864 | int i; |
| 1865 | unsigned char *csrc, *cdest; |
| 1866 | |
| 1867 | csrc = (unsigned char *) src; |
| 1868 | cdest = (unsigned char *) dest; |
| 1869 | i = 8; |
| 1870 | while (i--) |
| 1871 | *cdest++ = *csrc++; |
| 1872 | } |
| 1873 | |
| 1874 | static int |
| 1875 | threadmatch (threadref *dest, threadref *src) |
| 1876 | { |
| 1877 | /* Things are broken right now, so just assume we got a match. */ |
| 1878 | #if 0 |
| 1879 | unsigned char *srcp, *destp; |
| 1880 | int i, result; |
| 1881 | srcp = (char *) src; |
| 1882 | destp = (char *) dest; |
| 1883 | |
| 1884 | result = 1; |
| 1885 | while (i-- > 0) |
| 1886 | result &= (*srcp++ == *destp++) ? 1 : 0; |
| 1887 | return result; |
| 1888 | #endif |
| 1889 | return 1; |
| 1890 | } |
| 1891 | |
| 1892 | /* |
| 1893 | threadid:1, # always request threadid |
| 1894 | context_exists:2, |
| 1895 | display:4, |
| 1896 | unique_name:8, |
| 1897 | more_display:16 |
| 1898 | */ |
| 1899 | |
| 1900 | /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */ |
| 1901 | |
| 1902 | static char * |
| 1903 | pack_threadinfo_request (char *pkt, int mode, threadref *id) |
| 1904 | { |
| 1905 | *pkt++ = 'q'; /* Info Query */ |
| 1906 | *pkt++ = 'P'; /* process or thread info */ |
| 1907 | pkt = pack_int (pkt, mode); /* mode */ |
| 1908 | pkt = pack_threadid (pkt, id); /* threadid */ |
| 1909 | *pkt = '\0'; /* terminate */ |
| 1910 | return pkt; |
| 1911 | } |
| 1912 | |
| 1913 | /* These values tag the fields in a thread info response packet. */ |
| 1914 | /* Tagging the fields allows us to request specific fields and to |
| 1915 | add more fields as time goes by. */ |
| 1916 | |
| 1917 | #define TAG_THREADID 1 /* Echo the thread identifier. */ |
| 1918 | #define TAG_EXISTS 2 /* Is this process defined enough to |
| 1919 | fetch registers and its stack? */ |
| 1920 | #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */ |
| 1921 | #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */ |
| 1922 | #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about |
| 1923 | the process. */ |
| 1924 | |
| 1925 | static int |
| 1926 | remote_unpack_thread_info_response (char *pkt, threadref *expectedref, |
| 1927 | struct gdb_ext_thread_info *info) |
| 1928 | { |
| 1929 | struct remote_state *rs = get_remote_state (); |
| 1930 | int mask, length; |
| 1931 | int tag; |
| 1932 | threadref ref; |
| 1933 | char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */ |
| 1934 | int retval = 1; |
| 1935 | |
| 1936 | /* info->threadid = 0; FIXME: implement zero_threadref. */ |
| 1937 | info->active = 0; |
| 1938 | info->display[0] = '\0'; |
| 1939 | info->shortname[0] = '\0'; |
| 1940 | info->more_display[0] = '\0'; |
| 1941 | |
| 1942 | /* Assume the characters indicating the packet type have been |
| 1943 | stripped. */ |
| 1944 | pkt = unpack_int (pkt, &mask); /* arg mask */ |
| 1945 | pkt = unpack_threadid (pkt, &ref); |
| 1946 | |
| 1947 | if (mask == 0) |
| 1948 | warning (_("Incomplete response to threadinfo request.")); |
| 1949 | if (!threadmatch (&ref, expectedref)) |
| 1950 | { /* This is an answer to a different request. */ |
| 1951 | warning (_("ERROR RMT Thread info mismatch.")); |
| 1952 | return 0; |
| 1953 | } |
| 1954 | copy_threadref (&info->threadid, &ref); |
| 1955 | |
| 1956 | /* Loop on tagged fields , try to bail if somthing goes wrong. */ |
| 1957 | |
| 1958 | /* Packets are terminated with nulls. */ |
| 1959 | while ((pkt < limit) && mask && *pkt) |
| 1960 | { |
| 1961 | pkt = unpack_int (pkt, &tag); /* tag */ |
| 1962 | pkt = unpack_byte (pkt, &length); /* length */ |
| 1963 | if (!(tag & mask)) /* Tags out of synch with mask. */ |
| 1964 | { |
| 1965 | warning (_("ERROR RMT: threadinfo tag mismatch.")); |
| 1966 | retval = 0; |
| 1967 | break; |
| 1968 | } |
| 1969 | if (tag == TAG_THREADID) |
| 1970 | { |
| 1971 | if (length != 16) |
| 1972 | { |
| 1973 | warning (_("ERROR RMT: length of threadid is not 16.")); |
| 1974 | retval = 0; |
| 1975 | break; |
| 1976 | } |
| 1977 | pkt = unpack_threadid (pkt, &ref); |
| 1978 | mask = mask & ~TAG_THREADID; |
| 1979 | continue; |
| 1980 | } |
| 1981 | if (tag == TAG_EXISTS) |
| 1982 | { |
| 1983 | info->active = stub_unpack_int (pkt, length); |
| 1984 | pkt += length; |
| 1985 | mask = mask & ~(TAG_EXISTS); |
| 1986 | if (length > 8) |
| 1987 | { |
| 1988 | warning (_("ERROR RMT: 'exists' length too long.")); |
| 1989 | retval = 0; |
| 1990 | break; |
| 1991 | } |
| 1992 | continue; |
| 1993 | } |
| 1994 | if (tag == TAG_THREADNAME) |
| 1995 | { |
| 1996 | pkt = unpack_string (pkt, &info->shortname[0], length); |
| 1997 | mask = mask & ~TAG_THREADNAME; |
| 1998 | continue; |
| 1999 | } |
| 2000 | if (tag == TAG_DISPLAY) |
| 2001 | { |
| 2002 | pkt = unpack_string (pkt, &info->display[0], length); |
| 2003 | mask = mask & ~TAG_DISPLAY; |
| 2004 | continue; |
| 2005 | } |
| 2006 | if (tag == TAG_MOREDISPLAY) |
| 2007 | { |
| 2008 | pkt = unpack_string (pkt, &info->more_display[0], length); |
| 2009 | mask = mask & ~TAG_MOREDISPLAY; |
| 2010 | continue; |
| 2011 | } |
| 2012 | warning (_("ERROR RMT: unknown thread info tag.")); |
| 2013 | break; /* Not a tag we know about. */ |
| 2014 | } |
| 2015 | return retval; |
| 2016 | } |
| 2017 | |
| 2018 | static int |
| 2019 | remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */ |
| 2020 | struct gdb_ext_thread_info *info) |
| 2021 | { |
| 2022 | struct remote_state *rs = get_remote_state (); |
| 2023 | int result; |
| 2024 | |
| 2025 | pack_threadinfo_request (rs->buf, fieldset, threadid); |
| 2026 | putpkt (rs->buf); |
| 2027 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2028 | |
| 2029 | if (rs->buf[0] == '\0') |
| 2030 | return 0; |
| 2031 | |
| 2032 | result = remote_unpack_thread_info_response (rs->buf + 2, |
| 2033 | threadid, info); |
| 2034 | return result; |
| 2035 | } |
| 2036 | |
| 2037 | /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */ |
| 2038 | |
| 2039 | static char * |
| 2040 | pack_threadlist_request (char *pkt, int startflag, int threadcount, |
| 2041 | threadref *nextthread) |
| 2042 | { |
| 2043 | *pkt++ = 'q'; /* info query packet */ |
| 2044 | *pkt++ = 'L'; /* Process LIST or threadLIST request */ |
| 2045 | pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */ |
| 2046 | pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */ |
| 2047 | pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */ |
| 2048 | *pkt = '\0'; |
| 2049 | return pkt; |
| 2050 | } |
| 2051 | |
| 2052 | /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */ |
| 2053 | |
| 2054 | static int |
| 2055 | parse_threadlist_response (char *pkt, int result_limit, |
| 2056 | threadref *original_echo, threadref *resultlist, |
| 2057 | int *doneflag) |
| 2058 | { |
| 2059 | struct remote_state *rs = get_remote_state (); |
| 2060 | char *limit; |
| 2061 | int count, resultcount, done; |
| 2062 | |
| 2063 | resultcount = 0; |
| 2064 | /* Assume the 'q' and 'M chars have been stripped. */ |
| 2065 | limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE); |
| 2066 | /* done parse past here */ |
| 2067 | pkt = unpack_byte (pkt, &count); /* count field */ |
| 2068 | pkt = unpack_nibble (pkt, &done); |
| 2069 | /* The first threadid is the argument threadid. */ |
| 2070 | pkt = unpack_threadid (pkt, original_echo); /* should match query packet */ |
| 2071 | while ((count-- > 0) && (pkt < limit)) |
| 2072 | { |
| 2073 | pkt = unpack_threadid (pkt, resultlist++); |
| 2074 | if (resultcount++ >= result_limit) |
| 2075 | break; |
| 2076 | } |
| 2077 | if (doneflag) |
| 2078 | *doneflag = done; |
| 2079 | return resultcount; |
| 2080 | } |
| 2081 | |
| 2082 | static int |
| 2083 | remote_get_threadlist (int startflag, threadref *nextthread, int result_limit, |
| 2084 | int *done, int *result_count, threadref *threadlist) |
| 2085 | { |
| 2086 | struct remote_state *rs = get_remote_state (); |
| 2087 | static threadref echo_nextthread; |
| 2088 | int result = 1; |
| 2089 | |
| 2090 | /* Trancate result limit to be smaller than the packet size. */ |
| 2091 | if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= get_remote_packet_size ()) |
| 2092 | result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2; |
| 2093 | |
| 2094 | pack_threadlist_request (rs->buf, startflag, result_limit, nextthread); |
| 2095 | putpkt (rs->buf); |
| 2096 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2097 | |
| 2098 | if (*rs->buf == '\0') |
| 2099 | *result_count = 0; |
| 2100 | else |
| 2101 | *result_count = |
| 2102 | parse_threadlist_response (rs->buf + 2, result_limit, &echo_nextthread, |
| 2103 | threadlist, done); |
| 2104 | |
| 2105 | if (!threadmatch (&echo_nextthread, nextthread)) |
| 2106 | { |
| 2107 | /* FIXME: This is a good reason to drop the packet. */ |
| 2108 | /* Possably, there is a duplicate response. */ |
| 2109 | /* Possabilities : |
| 2110 | retransmit immediatly - race conditions |
| 2111 | retransmit after timeout - yes |
| 2112 | exit |
| 2113 | wait for packet, then exit |
| 2114 | */ |
| 2115 | warning (_("HMM: threadlist did not echo arg thread, dropping it.")); |
| 2116 | return 0; /* I choose simply exiting. */ |
| 2117 | } |
| 2118 | if (*result_count <= 0) |
| 2119 | { |
| 2120 | if (*done != 1) |
| 2121 | { |
| 2122 | warning (_("RMT ERROR : failed to get remote thread list.")); |
| 2123 | result = 0; |
| 2124 | } |
| 2125 | return result; /* break; */ |
| 2126 | } |
| 2127 | if (*result_count > result_limit) |
| 2128 | { |
| 2129 | *result_count = 0; |
| 2130 | warning (_("RMT ERROR: threadlist response longer than requested.")); |
| 2131 | return 0; |
| 2132 | } |
| 2133 | return result; |
| 2134 | } |
| 2135 | |
| 2136 | /* This is the interface between remote and threads, remotes upper |
| 2137 | interface. */ |
| 2138 | |
| 2139 | /* remote_find_new_threads retrieves the thread list and for each |
| 2140 | thread in the list, looks up the thread in GDB's internal list, |
| 2141 | adding the thread if it does not already exist. This involves |
| 2142 | getting partial thread lists from the remote target so, polling the |
| 2143 | quit_flag is required. */ |
| 2144 | |
| 2145 | |
| 2146 | /* About this many threadisds fit in a packet. */ |
| 2147 | |
| 2148 | #define MAXTHREADLISTRESULTS 32 |
| 2149 | |
| 2150 | static int |
| 2151 | remote_threadlist_iterator (rmt_thread_action stepfunction, void *context, |
| 2152 | int looplimit) |
| 2153 | { |
| 2154 | int done, i, result_count; |
| 2155 | int startflag = 1; |
| 2156 | int result = 1; |
| 2157 | int loopcount = 0; |
| 2158 | static threadref nextthread; |
| 2159 | static threadref resultthreadlist[MAXTHREADLISTRESULTS]; |
| 2160 | |
| 2161 | done = 0; |
| 2162 | while (!done) |
| 2163 | { |
| 2164 | if (loopcount++ > looplimit) |
| 2165 | { |
| 2166 | result = 0; |
| 2167 | warning (_("Remote fetch threadlist -infinite loop-.")); |
| 2168 | break; |
| 2169 | } |
| 2170 | if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS, |
| 2171 | &done, &result_count, resultthreadlist)) |
| 2172 | { |
| 2173 | result = 0; |
| 2174 | break; |
| 2175 | } |
| 2176 | /* Clear for later iterations. */ |
| 2177 | startflag = 0; |
| 2178 | /* Setup to resume next batch of thread references, set nextthread. */ |
| 2179 | if (result_count >= 1) |
| 2180 | copy_threadref (&nextthread, &resultthreadlist[result_count - 1]); |
| 2181 | i = 0; |
| 2182 | while (result_count--) |
| 2183 | if (!(result = (*stepfunction) (&resultthreadlist[i++], context))) |
| 2184 | break; |
| 2185 | } |
| 2186 | return result; |
| 2187 | } |
| 2188 | |
| 2189 | static int |
| 2190 | remote_newthread_step (threadref *ref, void *context) |
| 2191 | { |
| 2192 | int pid = ptid_get_pid (inferior_ptid); |
| 2193 | ptid_t ptid = ptid_build (pid, 0, threadref_to_int (ref)); |
| 2194 | |
| 2195 | if (!in_thread_list (ptid)) |
| 2196 | add_thread (ptid); |
| 2197 | return 1; /* continue iterator */ |
| 2198 | } |
| 2199 | |
| 2200 | #define CRAZY_MAX_THREADS 1000 |
| 2201 | |
| 2202 | static ptid_t |
| 2203 | remote_current_thread (ptid_t oldpid) |
| 2204 | { |
| 2205 | struct remote_state *rs = get_remote_state (); |
| 2206 | char *p = rs->buf; |
| 2207 | int tid; |
| 2208 | int pid; |
| 2209 | |
| 2210 | putpkt ("qC"); |
| 2211 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2212 | if (rs->buf[0] == 'Q' && rs->buf[1] == 'C') |
| 2213 | return read_ptid (&rs->buf[2], NULL); |
| 2214 | else |
| 2215 | return oldpid; |
| 2216 | } |
| 2217 | |
| 2218 | /* Find new threads for info threads command. |
| 2219 | * Original version, using John Metzler's thread protocol. |
| 2220 | */ |
| 2221 | |
| 2222 | static void |
| 2223 | remote_find_new_threads (void) |
| 2224 | { |
| 2225 | remote_threadlist_iterator (remote_newthread_step, 0, |
| 2226 | CRAZY_MAX_THREADS); |
| 2227 | } |
| 2228 | |
| 2229 | /* |
| 2230 | * Find all threads for info threads command. |
| 2231 | * Uses new thread protocol contributed by Cisco. |
| 2232 | * Falls back and attempts to use the older method (above) |
| 2233 | * if the target doesn't respond to the new method. |
| 2234 | */ |
| 2235 | |
| 2236 | static void |
| 2237 | remote_threads_info (struct target_ops *ops) |
| 2238 | { |
| 2239 | struct remote_state *rs = get_remote_state (); |
| 2240 | char *bufp; |
| 2241 | ptid_t new_thread; |
| 2242 | |
| 2243 | if (remote_desc == 0) /* paranoia */ |
| 2244 | error (_("Command can only be used when connected to the remote target.")); |
| 2245 | |
| 2246 | if (use_threadinfo_query) |
| 2247 | { |
| 2248 | putpkt ("qfThreadInfo"); |
| 2249 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2250 | bufp = rs->buf; |
| 2251 | if (bufp[0] != '\0') /* q packet recognized */ |
| 2252 | { |
| 2253 | while (*bufp++ == 'm') /* reply contains one or more TID */ |
| 2254 | { |
| 2255 | do |
| 2256 | { |
| 2257 | new_thread = read_ptid (bufp, &bufp); |
| 2258 | if (!ptid_equal (new_thread, null_ptid)) |
| 2259 | { |
| 2260 | /* In non-stop mode, we assume new found threads |
| 2261 | are running until proven otherwise with a |
| 2262 | stop reply. In all-stop, we can only get |
| 2263 | here if all threads are stopped. */ |
| 2264 | int running = non_stop ? 1 : 0; |
| 2265 | |
| 2266 | remote_notice_new_inferior (new_thread, running); |
| 2267 | } |
| 2268 | } |
| 2269 | while (*bufp++ == ','); /* comma-separated list */ |
| 2270 | putpkt ("qsThreadInfo"); |
| 2271 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2272 | bufp = rs->buf; |
| 2273 | } |
| 2274 | return; /* done */ |
| 2275 | } |
| 2276 | } |
| 2277 | |
| 2278 | /* Only qfThreadInfo is supported in non-stop mode. */ |
| 2279 | if (non_stop) |
| 2280 | return; |
| 2281 | |
| 2282 | /* Else fall back to old method based on jmetzler protocol. */ |
| 2283 | use_threadinfo_query = 0; |
| 2284 | remote_find_new_threads (); |
| 2285 | return; |
| 2286 | } |
| 2287 | |
| 2288 | /* |
| 2289 | * Collect a descriptive string about the given thread. |
| 2290 | * The target may say anything it wants to about the thread |
| 2291 | * (typically info about its blocked / runnable state, name, etc.). |
| 2292 | * This string will appear in the info threads display. |
| 2293 | * |
| 2294 | * Optional: targets are not required to implement this function. |
| 2295 | */ |
| 2296 | |
| 2297 | static char * |
| 2298 | remote_threads_extra_info (struct thread_info *tp) |
| 2299 | { |
| 2300 | struct remote_state *rs = get_remote_state (); |
| 2301 | int result; |
| 2302 | int set; |
| 2303 | threadref id; |
| 2304 | struct gdb_ext_thread_info threadinfo; |
| 2305 | static char display_buf[100]; /* arbitrary... */ |
| 2306 | int n = 0; /* position in display_buf */ |
| 2307 | |
| 2308 | if (remote_desc == 0) /* paranoia */ |
| 2309 | internal_error (__FILE__, __LINE__, |
| 2310 | _("remote_threads_extra_info")); |
| 2311 | |
| 2312 | if (ptid_equal (tp->ptid, magic_null_ptid) |
| 2313 | || (ptid_get_pid (tp->ptid) != 0 && ptid_get_tid (tp->ptid) == 0)) |
| 2314 | /* This is the main thread which was added by GDB. The remote |
| 2315 | server doesn't know about it. */ |
| 2316 | return NULL; |
| 2317 | |
| 2318 | if (use_threadextra_query) |
| 2319 | { |
| 2320 | char *b = rs->buf; |
| 2321 | char *endb = rs->buf + get_remote_packet_size (); |
| 2322 | |
| 2323 | xsnprintf (b, endb - b, "qThreadExtraInfo,"); |
| 2324 | b += strlen (b); |
| 2325 | write_ptid (b, endb, tp->ptid); |
| 2326 | |
| 2327 | putpkt (rs->buf); |
| 2328 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2329 | if (rs->buf[0] != 0) |
| 2330 | { |
| 2331 | n = min (strlen (rs->buf) / 2, sizeof (display_buf)); |
| 2332 | result = hex2bin (rs->buf, (gdb_byte *) display_buf, n); |
| 2333 | display_buf [result] = '\0'; |
| 2334 | return display_buf; |
| 2335 | } |
| 2336 | } |
| 2337 | |
| 2338 | /* If the above query fails, fall back to the old method. */ |
| 2339 | use_threadextra_query = 0; |
| 2340 | set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME |
| 2341 | | TAG_MOREDISPLAY | TAG_DISPLAY; |
| 2342 | int_to_threadref (&id, ptid_get_tid (tp->ptid)); |
| 2343 | if (remote_get_threadinfo (&id, set, &threadinfo)) |
| 2344 | if (threadinfo.active) |
| 2345 | { |
| 2346 | if (*threadinfo.shortname) |
| 2347 | n += xsnprintf (&display_buf[0], sizeof (display_buf) - n, |
| 2348 | " Name: %s,", threadinfo.shortname); |
| 2349 | if (*threadinfo.display) |
| 2350 | n += xsnprintf (&display_buf[n], sizeof (display_buf) - n, |
| 2351 | " State: %s,", threadinfo.display); |
| 2352 | if (*threadinfo.more_display) |
| 2353 | n += xsnprintf (&display_buf[n], sizeof (display_buf) - n, |
| 2354 | " Priority: %s", threadinfo.more_display); |
| 2355 | |
| 2356 | if (n > 0) |
| 2357 | { |
| 2358 | /* For purely cosmetic reasons, clear up trailing commas. */ |
| 2359 | if (',' == display_buf[n-1]) |
| 2360 | display_buf[n-1] = ' '; |
| 2361 | return display_buf; |
| 2362 | } |
| 2363 | } |
| 2364 | return NULL; |
| 2365 | } |
| 2366 | \f |
| 2367 | |
| 2368 | /* Restart the remote side; this is an extended protocol operation. */ |
| 2369 | |
| 2370 | static void |
| 2371 | extended_remote_restart (void) |
| 2372 | { |
| 2373 | struct remote_state *rs = get_remote_state (); |
| 2374 | |
| 2375 | /* Send the restart command; for reasons I don't understand the |
| 2376 | remote side really expects a number after the "R". */ |
| 2377 | xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0); |
| 2378 | putpkt (rs->buf); |
| 2379 | |
| 2380 | remote_fileio_reset (); |
| 2381 | } |
| 2382 | \f |
| 2383 | /* Clean up connection to a remote debugger. */ |
| 2384 | |
| 2385 | static void |
| 2386 | remote_close (int quitting) |
| 2387 | { |
| 2388 | if (remote_desc == NULL) |
| 2389 | return; /* already closed */ |
| 2390 | |
| 2391 | /* Make sure we leave stdin registered in the event loop, and we |
| 2392 | don't leave the async SIGINT signal handler installed. */ |
| 2393 | remote_terminal_ours (); |
| 2394 | |
| 2395 | serial_close (remote_desc); |
| 2396 | remote_desc = NULL; |
| 2397 | |
| 2398 | /* We don't have a connection to the remote stub anymore. Get rid |
| 2399 | of all the inferiors and their threads we were controlling. */ |
| 2400 | discard_all_inferiors (); |
| 2401 | |
| 2402 | /* We're no longer interested in any of these events. */ |
| 2403 | discard_pending_stop_replies (-1); |
| 2404 | |
| 2405 | if (remote_async_inferior_event_token) |
| 2406 | delete_async_event_handler (&remote_async_inferior_event_token); |
| 2407 | if (remote_async_get_pending_events_token) |
| 2408 | delete_async_event_handler (&remote_async_get_pending_events_token); |
| 2409 | } |
| 2410 | |
| 2411 | /* Query the remote side for the text, data and bss offsets. */ |
| 2412 | |
| 2413 | static void |
| 2414 | get_offsets (void) |
| 2415 | { |
| 2416 | struct remote_state *rs = get_remote_state (); |
| 2417 | char *buf; |
| 2418 | char *ptr; |
| 2419 | int lose, num_segments = 0, do_sections, do_segments; |
| 2420 | CORE_ADDR text_addr, data_addr, bss_addr, segments[2]; |
| 2421 | struct section_offsets *offs; |
| 2422 | struct symfile_segment_data *data; |
| 2423 | |
| 2424 | if (symfile_objfile == NULL) |
| 2425 | return; |
| 2426 | |
| 2427 | putpkt ("qOffsets"); |
| 2428 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2429 | buf = rs->buf; |
| 2430 | |
| 2431 | if (buf[0] == '\000') |
| 2432 | return; /* Return silently. Stub doesn't support |
| 2433 | this command. */ |
| 2434 | if (buf[0] == 'E') |
| 2435 | { |
| 2436 | warning (_("Remote failure reply: %s"), buf); |
| 2437 | return; |
| 2438 | } |
| 2439 | |
| 2440 | /* Pick up each field in turn. This used to be done with scanf, but |
| 2441 | scanf will make trouble if CORE_ADDR size doesn't match |
| 2442 | conversion directives correctly. The following code will work |
| 2443 | with any size of CORE_ADDR. */ |
| 2444 | text_addr = data_addr = bss_addr = 0; |
| 2445 | ptr = buf; |
| 2446 | lose = 0; |
| 2447 | |
| 2448 | if (strncmp (ptr, "Text=", 5) == 0) |
| 2449 | { |
| 2450 | ptr += 5; |
| 2451 | /* Don't use strtol, could lose on big values. */ |
| 2452 | while (*ptr && *ptr != ';') |
| 2453 | text_addr = (text_addr << 4) + fromhex (*ptr++); |
| 2454 | |
| 2455 | if (strncmp (ptr, ";Data=", 6) == 0) |
| 2456 | { |
| 2457 | ptr += 6; |
| 2458 | while (*ptr && *ptr != ';') |
| 2459 | data_addr = (data_addr << 4) + fromhex (*ptr++); |
| 2460 | } |
| 2461 | else |
| 2462 | lose = 1; |
| 2463 | |
| 2464 | if (!lose && strncmp (ptr, ";Bss=", 5) == 0) |
| 2465 | { |
| 2466 | ptr += 5; |
| 2467 | while (*ptr && *ptr != ';') |
| 2468 | bss_addr = (bss_addr << 4) + fromhex (*ptr++); |
| 2469 | |
| 2470 | if (bss_addr != data_addr) |
| 2471 | warning (_("Target reported unsupported offsets: %s"), buf); |
| 2472 | } |
| 2473 | else |
| 2474 | lose = 1; |
| 2475 | } |
| 2476 | else if (strncmp (ptr, "TextSeg=", 8) == 0) |
| 2477 | { |
| 2478 | ptr += 8; |
| 2479 | /* Don't use strtol, could lose on big values. */ |
| 2480 | while (*ptr && *ptr != ';') |
| 2481 | text_addr = (text_addr << 4) + fromhex (*ptr++); |
| 2482 | num_segments = 1; |
| 2483 | |
| 2484 | if (strncmp (ptr, ";DataSeg=", 9) == 0) |
| 2485 | { |
| 2486 | ptr += 9; |
| 2487 | while (*ptr && *ptr != ';') |
| 2488 | data_addr = (data_addr << 4) + fromhex (*ptr++); |
| 2489 | num_segments++; |
| 2490 | } |
| 2491 | } |
| 2492 | else |
| 2493 | lose = 1; |
| 2494 | |
| 2495 | if (lose) |
| 2496 | error (_("Malformed response to offset query, %s"), buf); |
| 2497 | else if (*ptr != '\0') |
| 2498 | warning (_("Target reported unsupported offsets: %s"), buf); |
| 2499 | |
| 2500 | offs = ((struct section_offsets *) |
| 2501 | alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections))); |
| 2502 | memcpy (offs, symfile_objfile->section_offsets, |
| 2503 | SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)); |
| 2504 | |
| 2505 | data = get_symfile_segment_data (symfile_objfile->obfd); |
| 2506 | do_segments = (data != NULL); |
| 2507 | do_sections = num_segments == 0; |
| 2508 | |
| 2509 | if (num_segments > 0) |
| 2510 | { |
| 2511 | segments[0] = text_addr; |
| 2512 | segments[1] = data_addr; |
| 2513 | } |
| 2514 | /* If we have two segments, we can still try to relocate everything |
| 2515 | by assuming that the .text and .data offsets apply to the whole |
| 2516 | text and data segments. Convert the offsets given in the packet |
| 2517 | to base addresses for symfile_map_offsets_to_segments. */ |
| 2518 | else if (data && data->num_segments == 2) |
| 2519 | { |
| 2520 | segments[0] = data->segment_bases[0] + text_addr; |
| 2521 | segments[1] = data->segment_bases[1] + data_addr; |
| 2522 | num_segments = 2; |
| 2523 | } |
| 2524 | /* If the object file has only one segment, assume that it is text |
| 2525 | rather than data; main programs with no writable data are rare, |
| 2526 | but programs with no code are useless. Of course the code might |
| 2527 | have ended up in the data segment... to detect that we would need |
| 2528 | the permissions here. */ |
| 2529 | else if (data && data->num_segments == 1) |
| 2530 | { |
| 2531 | segments[0] = data->segment_bases[0] + text_addr; |
| 2532 | num_segments = 1; |
| 2533 | } |
| 2534 | /* There's no way to relocate by segment. */ |
| 2535 | else |
| 2536 | do_segments = 0; |
| 2537 | |
| 2538 | if (do_segments) |
| 2539 | { |
| 2540 | int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data, |
| 2541 | offs, num_segments, segments); |
| 2542 | |
| 2543 | if (ret == 0 && !do_sections) |
| 2544 | error (_("Can not handle qOffsets TextSeg response with this symbol file")); |
| 2545 | |
| 2546 | if (ret > 0) |
| 2547 | do_sections = 0; |
| 2548 | } |
| 2549 | |
| 2550 | if (data) |
| 2551 | free_symfile_segment_data (data); |
| 2552 | |
| 2553 | if (do_sections) |
| 2554 | { |
| 2555 | offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr; |
| 2556 | |
| 2557 | /* This is a temporary kludge to force data and bss to use the same offsets |
| 2558 | because that's what nlmconv does now. The real solution requires changes |
| 2559 | to the stub and remote.c that I don't have time to do right now. */ |
| 2560 | |
| 2561 | offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr; |
| 2562 | offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr; |
| 2563 | } |
| 2564 | |
| 2565 | objfile_relocate (symfile_objfile, offs); |
| 2566 | } |
| 2567 | |
| 2568 | /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in |
| 2569 | threads we know are stopped already. This is used during the |
| 2570 | initial remote connection in non-stop mode --- threads that are |
| 2571 | reported as already being stopped are left stopped. */ |
| 2572 | |
| 2573 | static int |
| 2574 | set_stop_requested_callback (struct thread_info *thread, void *data) |
| 2575 | { |
| 2576 | /* If we have a stop reply for this thread, it must be stopped. */ |
| 2577 | if (peek_stop_reply (thread->ptid)) |
| 2578 | set_stop_requested (thread->ptid, 1); |
| 2579 | |
| 2580 | return 0; |
| 2581 | } |
| 2582 | |
| 2583 | /* Stub for catch_exception. */ |
| 2584 | |
| 2585 | struct start_remote_args |
| 2586 | { |
| 2587 | int from_tty; |
| 2588 | |
| 2589 | /* The current target. */ |
| 2590 | struct target_ops *target; |
| 2591 | |
| 2592 | /* Non-zero if this is an extended-remote target. */ |
| 2593 | int extended_p; |
| 2594 | }; |
| 2595 | |
| 2596 | static void |
| 2597 | remote_start_remote (struct ui_out *uiout, void *opaque) |
| 2598 | { |
| 2599 | struct start_remote_args *args = opaque; |
| 2600 | struct remote_state *rs = get_remote_state (); |
| 2601 | struct packet_config *noack_config; |
| 2602 | char *wait_status = NULL; |
| 2603 | |
| 2604 | immediate_quit++; /* Allow user to interrupt it. */ |
| 2605 | |
| 2606 | /* Ack any packet which the remote side has already sent. */ |
| 2607 | serial_write (remote_desc, "+", 1); |
| 2608 | |
| 2609 | /* The first packet we send to the target is the optional "supported |
| 2610 | packets" request. If the target can answer this, it will tell us |
| 2611 | which later probes to skip. */ |
| 2612 | remote_query_supported (); |
| 2613 | |
| 2614 | /* Next, we possibly activate noack mode. |
| 2615 | |
| 2616 | If the QStartNoAckMode packet configuration is set to AUTO, |
| 2617 | enable noack mode if the stub reported a wish for it with |
| 2618 | qSupported. |
| 2619 | |
| 2620 | If set to TRUE, then enable noack mode even if the stub didn't |
| 2621 | report it in qSupported. If the stub doesn't reply OK, the |
| 2622 | session ends with an error. |
| 2623 | |
| 2624 | If FALSE, then don't activate noack mode, regardless of what the |
| 2625 | stub claimed should be the default with qSupported. */ |
| 2626 | |
| 2627 | noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode]; |
| 2628 | |
| 2629 | if (noack_config->detect == AUTO_BOOLEAN_TRUE |
| 2630 | || (noack_config->detect == AUTO_BOOLEAN_AUTO |
| 2631 | && noack_config->support == PACKET_ENABLE)) |
| 2632 | { |
| 2633 | putpkt ("QStartNoAckMode"); |
| 2634 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2635 | if (packet_ok (rs->buf, noack_config) == PACKET_OK) |
| 2636 | rs->noack_mode = 1; |
| 2637 | } |
| 2638 | |
| 2639 | if (args->extended_p) |
| 2640 | { |
| 2641 | /* Tell the remote that we are using the extended protocol. */ |
| 2642 | putpkt ("!"); |
| 2643 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2644 | } |
| 2645 | |
| 2646 | /* Next, if the target can specify a description, read it. We do |
| 2647 | this before anything involving memory or registers. */ |
| 2648 | target_find_description (); |
| 2649 | |
| 2650 | /* On OSs where the list of libraries is global to all |
| 2651 | processes, we fetch them early. */ |
| 2652 | if (gdbarch_has_global_solist (target_gdbarch)) |
| 2653 | solib_add (NULL, args->from_tty, args->target, auto_solib_add); |
| 2654 | |
| 2655 | if (non_stop) |
| 2656 | { |
| 2657 | if (!rs->non_stop_aware) |
| 2658 | error (_("Non-stop mode requested, but remote does not support non-stop")); |
| 2659 | |
| 2660 | putpkt ("QNonStop:1"); |
| 2661 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2662 | |
| 2663 | if (strcmp (rs->buf, "OK") != 0) |
| 2664 | error ("Remote refused setting non-stop mode with: %s", rs->buf); |
| 2665 | |
| 2666 | /* Find about threads and processes the stub is already |
| 2667 | controlling. We default to adding them in the running state. |
| 2668 | The '?' query below will then tell us about which threads are |
| 2669 | stopped. */ |
| 2670 | remote_threads_info (args->target); |
| 2671 | } |
| 2672 | else if (rs->non_stop_aware) |
| 2673 | { |
| 2674 | /* Don't assume that the stub can operate in all-stop mode. |
| 2675 | Request it explicitely. */ |
| 2676 | putpkt ("QNonStop:0"); |
| 2677 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2678 | |
| 2679 | if (strcmp (rs->buf, "OK") != 0) |
| 2680 | error ("Remote refused setting all-stop mode with: %s", rs->buf); |
| 2681 | } |
| 2682 | |
| 2683 | /* Check whether the target is running now. */ |
| 2684 | putpkt ("?"); |
| 2685 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2686 | |
| 2687 | if (!non_stop) |
| 2688 | { |
| 2689 | if (rs->buf[0] == 'W' || rs->buf[0] == 'X') |
| 2690 | { |
| 2691 | if (args->extended_p) |
| 2692 | { |
| 2693 | /* We're connected, but not running. Drop out before we |
| 2694 | call start_remote. */ |
| 2695 | target_mark_exited (args->target); |
| 2696 | return; |
| 2697 | } |
| 2698 | else |
| 2699 | error (_("The target is not running (try extended-remote?)")); |
| 2700 | } |
| 2701 | else |
| 2702 | { |
| 2703 | /* Save the reply for later. */ |
| 2704 | wait_status = alloca (strlen (rs->buf) + 1); |
| 2705 | strcpy (wait_status, rs->buf); |
| 2706 | } |
| 2707 | |
| 2708 | /* Let the stub know that we want it to return the thread. */ |
| 2709 | set_continue_thread (minus_one_ptid); |
| 2710 | |
| 2711 | /* Without this, some commands which require an active target |
| 2712 | (such as kill) won't work. This variable serves (at least) |
| 2713 | double duty as both the pid of the target process (if it has |
| 2714 | such), and as a flag indicating that a target is active. |
| 2715 | These functions should be split out into seperate variables, |
| 2716 | especially since GDB will someday have a notion of debugging |
| 2717 | several processes. */ |
| 2718 | inferior_ptid = magic_null_ptid; |
| 2719 | |
| 2720 | /* Now, if we have thread information, update inferior_ptid. */ |
| 2721 | inferior_ptid = remote_current_thread (inferior_ptid); |
| 2722 | |
| 2723 | remote_add_inferior (ptid_get_pid (inferior_ptid), -1); |
| 2724 | |
| 2725 | /* Always add the main thread. */ |
| 2726 | add_thread_silent (inferior_ptid); |
| 2727 | |
| 2728 | get_offsets (); /* Get text, data & bss offsets. */ |
| 2729 | |
| 2730 | /* If we could not find a description using qXfer, and we know |
| 2731 | how to do it some other way, try again. This is not |
| 2732 | supported for non-stop; it could be, but it is tricky if |
| 2733 | there are no stopped threads when we connect. */ |
| 2734 | if (remote_read_description_p (args->target) |
| 2735 | && gdbarch_target_desc (target_gdbarch) == NULL) |
| 2736 | { |
| 2737 | target_clear_description (); |
| 2738 | target_find_description (); |
| 2739 | } |
| 2740 | |
| 2741 | /* Use the previously fetched status. */ |
| 2742 | gdb_assert (wait_status != NULL); |
| 2743 | strcpy (rs->buf, wait_status); |
| 2744 | rs->cached_wait_status = 1; |
| 2745 | |
| 2746 | immediate_quit--; |
| 2747 | start_remote (args->from_tty); /* Initialize gdb process mechanisms. */ |
| 2748 | } |
| 2749 | else |
| 2750 | { |
| 2751 | /* Clear WFI global state. Do this before finding about new |
| 2752 | threads and inferiors, and setting the current inferior. |
| 2753 | Otherwise we would clear the proceed status of the current |
| 2754 | inferior when we want its stop_soon state to be preserved |
| 2755 | (see notice_new_inferior). */ |
| 2756 | init_wait_for_inferior (); |
| 2757 | |
| 2758 | /* In non-stop, we will either get an "OK", meaning that there |
| 2759 | are no stopped threads at this time; or, a regular stop |
| 2760 | reply. In the latter case, there may be more than one thread |
| 2761 | stopped --- we pull them all out using the vStopped |
| 2762 | mechanism. */ |
| 2763 | if (strcmp (rs->buf, "OK") != 0) |
| 2764 | { |
| 2765 | struct stop_reply *stop_reply; |
| 2766 | struct cleanup *old_chain; |
| 2767 | |
| 2768 | stop_reply = stop_reply_xmalloc (); |
| 2769 | old_chain = make_cleanup (do_stop_reply_xfree, stop_reply); |
| 2770 | |
| 2771 | remote_parse_stop_reply (rs->buf, stop_reply); |
| 2772 | discard_cleanups (old_chain); |
| 2773 | |
| 2774 | /* get_pending_stop_replies acks this one, and gets the rest |
| 2775 | out. */ |
| 2776 | pending_stop_reply = stop_reply; |
| 2777 | remote_get_pending_stop_replies (); |
| 2778 | |
| 2779 | /* Make sure that threads that were stopped remain |
| 2780 | stopped. */ |
| 2781 | iterate_over_threads (set_stop_requested_callback, NULL); |
| 2782 | } |
| 2783 | |
| 2784 | if (target_can_async_p ()) |
| 2785 | target_async (inferior_event_handler, 0); |
| 2786 | |
| 2787 | if (thread_count () == 0) |
| 2788 | { |
| 2789 | if (args->extended_p) |
| 2790 | { |
| 2791 | /* We're connected, but not running. Drop out before we |
| 2792 | call start_remote. */ |
| 2793 | target_mark_exited (args->target); |
| 2794 | return; |
| 2795 | } |
| 2796 | else |
| 2797 | error (_("The target is not running (try extended-remote?)")); |
| 2798 | } |
| 2799 | |
| 2800 | if (args->extended_p) |
| 2801 | target_mark_running (args->target); |
| 2802 | |
| 2803 | /* Let the stub know that we want it to return the thread. */ |
| 2804 | |
| 2805 | /* Force the stub to choose a thread. */ |
| 2806 | set_general_thread (null_ptid); |
| 2807 | |
| 2808 | /* Query it. */ |
| 2809 | inferior_ptid = remote_current_thread (minus_one_ptid); |
| 2810 | if (ptid_equal (inferior_ptid, minus_one_ptid)) |
| 2811 | error (_("remote didn't report the current thread in non-stop mode")); |
| 2812 | |
| 2813 | get_offsets (); /* Get text, data & bss offsets. */ |
| 2814 | |
| 2815 | /* In non-stop mode, any cached wait status will be stored in |
| 2816 | the stop reply queue. */ |
| 2817 | gdb_assert (wait_status == NULL); |
| 2818 | } |
| 2819 | |
| 2820 | /* If we connected to a live target, do some additional setup. */ |
| 2821 | if (target_has_execution) |
| 2822 | { |
| 2823 | if (exec_bfd) /* No use without an exec file. */ |
| 2824 | remote_check_symbols (symfile_objfile); |
| 2825 | } |
| 2826 | |
| 2827 | /* If breakpoints are global, insert them now. */ |
| 2828 | if (gdbarch_has_global_breakpoints (target_gdbarch) |
| 2829 | && breakpoints_always_inserted_mode ()) |
| 2830 | insert_breakpoints (); |
| 2831 | } |
| 2832 | |
| 2833 | /* Open a connection to a remote debugger. |
| 2834 | NAME is the filename used for communication. */ |
| 2835 | |
| 2836 | static void |
| 2837 | remote_open (char *name, int from_tty) |
| 2838 | { |
| 2839 | remote_open_1 (name, from_tty, &remote_ops, 0); |
| 2840 | } |
| 2841 | |
| 2842 | /* Open a connection to a remote debugger using the extended |
| 2843 | remote gdb protocol. NAME is the filename used for communication. */ |
| 2844 | |
| 2845 | static void |
| 2846 | extended_remote_open (char *name, int from_tty) |
| 2847 | { |
| 2848 | remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */); |
| 2849 | } |
| 2850 | |
| 2851 | /* Generic code for opening a connection to a remote target. */ |
| 2852 | |
| 2853 | static void |
| 2854 | init_all_packet_configs (void) |
| 2855 | { |
| 2856 | int i; |
| 2857 | for (i = 0; i < PACKET_MAX; i++) |
| 2858 | update_packet_config (&remote_protocol_packets[i]); |
| 2859 | } |
| 2860 | |
| 2861 | /* Symbol look-up. */ |
| 2862 | |
| 2863 | static void |
| 2864 | remote_check_symbols (struct objfile *objfile) |
| 2865 | { |
| 2866 | struct remote_state *rs = get_remote_state (); |
| 2867 | char *msg, *reply, *tmp; |
| 2868 | struct minimal_symbol *sym; |
| 2869 | int end; |
| 2870 | |
| 2871 | if (remote_protocol_packets[PACKET_qSymbol].support == PACKET_DISABLE) |
| 2872 | return; |
| 2873 | |
| 2874 | /* Make sure the remote is pointing at the right process. */ |
| 2875 | set_general_process (); |
| 2876 | |
| 2877 | /* Allocate a message buffer. We can't reuse the input buffer in RS, |
| 2878 | because we need both at the same time. */ |
| 2879 | msg = alloca (get_remote_packet_size ()); |
| 2880 | |
| 2881 | /* Invite target to request symbol lookups. */ |
| 2882 | |
| 2883 | putpkt ("qSymbol::"); |
| 2884 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2885 | packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]); |
| 2886 | reply = rs->buf; |
| 2887 | |
| 2888 | while (strncmp (reply, "qSymbol:", 8) == 0) |
| 2889 | { |
| 2890 | tmp = &reply[8]; |
| 2891 | end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2); |
| 2892 | msg[end] = '\0'; |
| 2893 | sym = lookup_minimal_symbol (msg, NULL, NULL); |
| 2894 | if (sym == NULL) |
| 2895 | xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]); |
| 2896 | else |
| 2897 | { |
| 2898 | CORE_ADDR sym_addr = SYMBOL_VALUE_ADDRESS (sym); |
| 2899 | |
| 2900 | /* If this is a function address, return the start of code |
| 2901 | instead of any data function descriptor. */ |
| 2902 | sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch, |
| 2903 | sym_addr, |
| 2904 | ¤t_target); |
| 2905 | |
| 2906 | xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s", |
| 2907 | paddr_nz (sym_addr), &reply[8]); |
| 2908 | } |
| 2909 | |
| 2910 | putpkt (msg); |
| 2911 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 2912 | reply = rs->buf; |
| 2913 | } |
| 2914 | } |
| 2915 | |
| 2916 | static struct serial * |
| 2917 | remote_serial_open (char *name) |
| 2918 | { |
| 2919 | static int udp_warning = 0; |
| 2920 | |
| 2921 | /* FIXME: Parsing NAME here is a hack. But we want to warn here instead |
| 2922 | of in ser-tcp.c, because it is the remote protocol assuming that the |
| 2923 | serial connection is reliable and not the serial connection promising |
| 2924 | to be. */ |
| 2925 | if (!udp_warning && strncmp (name, "udp:", 4) == 0) |
| 2926 | { |
| 2927 | warning (_("\ |
| 2928 | The remote protocol may be unreliable over UDP.\n\ |
| 2929 | Some events may be lost, rendering further debugging impossible.")); |
| 2930 | udp_warning = 1; |
| 2931 | } |
| 2932 | |
| 2933 | return serial_open (name); |
| 2934 | } |
| 2935 | |
| 2936 | /* This type describes each known response to the qSupported |
| 2937 | packet. */ |
| 2938 | struct protocol_feature |
| 2939 | { |
| 2940 | /* The name of this protocol feature. */ |
| 2941 | const char *name; |
| 2942 | |
| 2943 | /* The default for this protocol feature. */ |
| 2944 | enum packet_support default_support; |
| 2945 | |
| 2946 | /* The function to call when this feature is reported, or after |
| 2947 | qSupported processing if the feature is not supported. |
| 2948 | The first argument points to this structure. The second |
| 2949 | argument indicates whether the packet requested support be |
| 2950 | enabled, disabled, or probed (or the default, if this function |
| 2951 | is being called at the end of processing and this feature was |
| 2952 | not reported). The third argument may be NULL; if not NULL, it |
| 2953 | is a NUL-terminated string taken from the packet following |
| 2954 | this feature's name and an equals sign. */ |
| 2955 | void (*func) (const struct protocol_feature *, enum packet_support, |
| 2956 | const char *); |
| 2957 | |
| 2958 | /* The corresponding packet for this feature. Only used if |
| 2959 | FUNC is remote_supported_packet. */ |
| 2960 | int packet; |
| 2961 | }; |
| 2962 | |
| 2963 | static void |
| 2964 | remote_supported_packet (const struct protocol_feature *feature, |
| 2965 | enum packet_support support, |
| 2966 | const char *argument) |
| 2967 | { |
| 2968 | if (argument) |
| 2969 | { |
| 2970 | warning (_("Remote qSupported response supplied an unexpected value for" |
| 2971 | " \"%s\"."), feature->name); |
| 2972 | return; |
| 2973 | } |
| 2974 | |
| 2975 | if (remote_protocol_packets[feature->packet].support |
| 2976 | == PACKET_SUPPORT_UNKNOWN) |
| 2977 | remote_protocol_packets[feature->packet].support = support; |
| 2978 | } |
| 2979 | |
| 2980 | static void |
| 2981 | remote_packet_size (const struct protocol_feature *feature, |
| 2982 | enum packet_support support, const char *value) |
| 2983 | { |
| 2984 | struct remote_state *rs = get_remote_state (); |
| 2985 | |
| 2986 | int packet_size; |
| 2987 | char *value_end; |
| 2988 | |
| 2989 | if (support != PACKET_ENABLE) |
| 2990 | return; |
| 2991 | |
| 2992 | if (value == NULL || *value == '\0') |
| 2993 | { |
| 2994 | warning (_("Remote target reported \"%s\" without a size."), |
| 2995 | feature->name); |
| 2996 | return; |
| 2997 | } |
| 2998 | |
| 2999 | errno = 0; |
| 3000 | packet_size = strtol (value, &value_end, 16); |
| 3001 | if (errno != 0 || *value_end != '\0' || packet_size < 0) |
| 3002 | { |
| 3003 | warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."), |
| 3004 | feature->name, value); |
| 3005 | return; |
| 3006 | } |
| 3007 | |
| 3008 | if (packet_size > MAX_REMOTE_PACKET_SIZE) |
| 3009 | { |
| 3010 | warning (_("limiting remote suggested packet size (%d bytes) to %d"), |
| 3011 | packet_size, MAX_REMOTE_PACKET_SIZE); |
| 3012 | packet_size = MAX_REMOTE_PACKET_SIZE; |
| 3013 | } |
| 3014 | |
| 3015 | /* Record the new maximum packet size. */ |
| 3016 | rs->explicit_packet_size = packet_size; |
| 3017 | } |
| 3018 | |
| 3019 | static void |
| 3020 | remote_multi_process_feature (const struct protocol_feature *feature, |
| 3021 | enum packet_support support, const char *value) |
| 3022 | { |
| 3023 | struct remote_state *rs = get_remote_state (); |
| 3024 | rs->multi_process_aware = (support == PACKET_ENABLE); |
| 3025 | } |
| 3026 | |
| 3027 | static void |
| 3028 | remote_non_stop_feature (const struct protocol_feature *feature, |
| 3029 | enum packet_support support, const char *value) |
| 3030 | { |
| 3031 | struct remote_state *rs = get_remote_state (); |
| 3032 | rs->non_stop_aware = (support == PACKET_ENABLE); |
| 3033 | } |
| 3034 | |
| 3035 | static struct protocol_feature remote_protocol_features[] = { |
| 3036 | { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 }, |
| 3037 | { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet, |
| 3038 | PACKET_qXfer_auxv }, |
| 3039 | { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet, |
| 3040 | PACKET_qXfer_features }, |
| 3041 | { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet, |
| 3042 | PACKET_qXfer_libraries }, |
| 3043 | { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet, |
| 3044 | PACKET_qXfer_memory_map }, |
| 3045 | { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet, |
| 3046 | PACKET_qXfer_spu_read }, |
| 3047 | { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet, |
| 3048 | PACKET_qXfer_spu_write }, |
| 3049 | { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet, |
| 3050 | PACKET_qXfer_osdata }, |
| 3051 | { "QPassSignals", PACKET_DISABLE, remote_supported_packet, |
| 3052 | PACKET_QPassSignals }, |
| 3053 | { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet, |
| 3054 | PACKET_QStartNoAckMode }, |
| 3055 | { "multiprocess", PACKET_DISABLE, remote_multi_process_feature, -1 }, |
| 3056 | { "QNonStop", PACKET_DISABLE, remote_non_stop_feature, -1 }, |
| 3057 | { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet, |
| 3058 | PACKET_qXfer_siginfo_read }, |
| 3059 | { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet, |
| 3060 | PACKET_qXfer_siginfo_write }, |
| 3061 | }; |
| 3062 | |
| 3063 | static void |
| 3064 | remote_query_supported (void) |
| 3065 | { |
| 3066 | struct remote_state *rs = get_remote_state (); |
| 3067 | char *next; |
| 3068 | int i; |
| 3069 | unsigned char seen [ARRAY_SIZE (remote_protocol_features)]; |
| 3070 | |
| 3071 | /* The packet support flags are handled differently for this packet |
| 3072 | than for most others. We treat an error, a disabled packet, and |
| 3073 | an empty response identically: any features which must be reported |
| 3074 | to be used will be automatically disabled. An empty buffer |
| 3075 | accomplishes this, since that is also the representation for a list |
| 3076 | containing no features. */ |
| 3077 | |
| 3078 | rs->buf[0] = 0; |
| 3079 | if (remote_protocol_packets[PACKET_qSupported].support != PACKET_DISABLE) |
| 3080 | { |
| 3081 | if (rs->extended) |
| 3082 | putpkt ("qSupported:multiprocess+"); |
| 3083 | else |
| 3084 | putpkt ("qSupported"); |
| 3085 | |
| 3086 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 3087 | |
| 3088 | /* If an error occured, warn, but do not return - just reset the |
| 3089 | buffer to empty and go on to disable features. */ |
| 3090 | if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported]) |
| 3091 | == PACKET_ERROR) |
| 3092 | { |
| 3093 | warning (_("Remote failure reply: %s"), rs->buf); |
| 3094 | rs->buf[0] = 0; |
| 3095 | } |
| 3096 | } |
| 3097 | |
| 3098 | memset (seen, 0, sizeof (seen)); |
| 3099 | |
| 3100 | next = rs->buf; |
| 3101 | while (*next) |
| 3102 | { |
| 3103 | enum packet_support is_supported; |
| 3104 | char *p, *end, *name_end, *value; |
| 3105 | |
| 3106 | /* First separate out this item from the rest of the packet. If |
| 3107 | there's another item after this, we overwrite the separator |
| 3108 | (terminated strings are much easier to work with). */ |
| 3109 | p = next; |
| 3110 | end = strchr (p, ';'); |
| 3111 | if (end == NULL) |
| 3112 | { |
| 3113 | end = p + strlen (p); |
| 3114 | next = end; |
| 3115 | } |
| 3116 | else |
| 3117 | { |
| 3118 | *end = '\0'; |
| 3119 | next = end + 1; |
| 3120 | |
| 3121 | if (end == p) |
| 3122 | { |
| 3123 | warning (_("empty item in \"qSupported\" response")); |
| 3124 | continue; |
| 3125 | } |
| 3126 | } |
| 3127 | |
| 3128 | name_end = strchr (p, '='); |
| 3129 | if (name_end) |
| 3130 | { |
| 3131 | /* This is a name=value entry. */ |
| 3132 | is_supported = PACKET_ENABLE; |
| 3133 | value = name_end + 1; |
| 3134 | *name_end = '\0'; |
| 3135 | } |
| 3136 | else |
| 3137 | { |
| 3138 | value = NULL; |
| 3139 | switch (end[-1]) |
| 3140 | { |
| 3141 | case '+': |
| 3142 | is_supported = PACKET_ENABLE; |
| 3143 | break; |
| 3144 | |
| 3145 | case '-': |
| 3146 | is_supported = PACKET_DISABLE; |
| 3147 | break; |
| 3148 | |
| 3149 | case '?': |
| 3150 | is_supported = PACKET_SUPPORT_UNKNOWN; |
| 3151 | break; |
| 3152 | |
| 3153 | default: |
| 3154 | warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p); |
| 3155 | continue; |
| 3156 | } |
| 3157 | end[-1] = '\0'; |
| 3158 | } |
| 3159 | |
| 3160 | for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++) |
| 3161 | if (strcmp (remote_protocol_features[i].name, p) == 0) |
| 3162 | { |
| 3163 | const struct protocol_feature *feature; |
| 3164 | |
| 3165 | seen[i] = 1; |
| 3166 | feature = &remote_protocol_features[i]; |
| 3167 | feature->func (feature, is_supported, value); |
| 3168 | break; |
| 3169 | } |
| 3170 | } |
| 3171 | |
| 3172 | /* If we increased the packet size, make sure to increase the global |
| 3173 | buffer size also. We delay this until after parsing the entire |
| 3174 | qSupported packet, because this is the same buffer we were |
| 3175 | parsing. */ |
| 3176 | if (rs->buf_size < rs->explicit_packet_size) |
| 3177 | { |
| 3178 | rs->buf_size = rs->explicit_packet_size; |
| 3179 | rs->buf = xrealloc (rs->buf, rs->buf_size); |
| 3180 | } |
| 3181 | |
| 3182 | /* Handle the defaults for unmentioned features. */ |
| 3183 | for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++) |
| 3184 | if (!seen[i]) |
| 3185 | { |
| 3186 | const struct protocol_feature *feature; |
| 3187 | |
| 3188 | feature = &remote_protocol_features[i]; |
| 3189 | feature->func (feature, feature->default_support, NULL); |
| 3190 | } |
| 3191 | } |
| 3192 | |
| 3193 | |
| 3194 | static void |
| 3195 | remote_open_1 (char *name, int from_tty, struct target_ops *target, int extended_p) |
| 3196 | { |
| 3197 | struct remote_state *rs = get_remote_state (); |
| 3198 | |
| 3199 | if (name == 0) |
| 3200 | error (_("To open a remote debug connection, you need to specify what\n" |
| 3201 | "serial device is attached to the remote system\n" |
| 3202 | "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).")); |
| 3203 | |
| 3204 | /* See FIXME above. */ |
| 3205 | if (!target_async_permitted) |
| 3206 | wait_forever_enabled_p = 1; |
| 3207 | |
| 3208 | /* If we're connected to a running target, target_preopen will kill it. |
| 3209 | But if we're connected to a target system with no running process, |
| 3210 | then we will still be connected when it returns. Ask this question |
| 3211 | first, before target_preopen has a chance to kill anything. */ |
| 3212 | if (remote_desc != NULL && !target_has_execution) |
| 3213 | { |
| 3214 | if (!from_tty |
| 3215 | || query (_("Already connected to a remote target. Disconnect? "))) |
| 3216 | pop_target (); |
| 3217 | else |
| 3218 | error (_("Still connected.")); |
| 3219 | } |
| 3220 | |
| 3221 | target_preopen (from_tty); |
| 3222 | |
| 3223 | unpush_target (target); |
| 3224 | |
| 3225 | /* This time without a query. If we were connected to an |
| 3226 | extended-remote target and target_preopen killed the running |
| 3227 | process, we may still be connected. If we are starting "target |
| 3228 | remote" now, the extended-remote target will not have been |
| 3229 | removed by unpush_target. */ |
| 3230 | if (remote_desc != NULL && !target_has_execution) |
| 3231 | pop_target (); |
| 3232 | |
| 3233 | /* Make sure we send the passed signals list the next time we resume. */ |
| 3234 | xfree (last_pass_packet); |
| 3235 | last_pass_packet = NULL; |
| 3236 | |
| 3237 | remote_fileio_reset (); |
| 3238 | reopen_exec_file (); |
| 3239 | reread_symbols (); |
| 3240 | |
| 3241 | remote_desc = remote_serial_open (name); |
| 3242 | if (!remote_desc) |
| 3243 | perror_with_name (name); |
| 3244 | |
| 3245 | if (baud_rate != -1) |
| 3246 | { |
| 3247 | if (serial_setbaudrate (remote_desc, baud_rate)) |
| 3248 | { |
| 3249 | /* The requested speed could not be set. Error out to |
| 3250 | top level after closing remote_desc. Take care to |
| 3251 | set remote_desc to NULL to avoid closing remote_desc |
| 3252 | more than once. */ |
| 3253 | serial_close (remote_desc); |
| 3254 | remote_desc = NULL; |
| 3255 | perror_with_name (name); |
| 3256 | } |
| 3257 | } |
| 3258 | |
| 3259 | serial_raw (remote_desc); |
| 3260 | |
| 3261 | /* If there is something sitting in the buffer we might take it as a |
| 3262 | response to a command, which would be bad. */ |
| 3263 | serial_flush_input (remote_desc); |
| 3264 | |
| 3265 | if (from_tty) |
| 3266 | { |
| 3267 | puts_filtered ("Remote debugging using "); |
| 3268 | puts_filtered (name); |
| 3269 | puts_filtered ("\n"); |
| 3270 | } |
| 3271 | push_target (target); /* Switch to using remote target now. */ |
| 3272 | |
| 3273 | /* Assume that the target is not running, until we learn otherwise. */ |
| 3274 | if (extended_p) |
| 3275 | target_mark_exited (target); |
| 3276 | |
| 3277 | /* Register extra event sources in the event loop. */ |
| 3278 | remote_async_inferior_event_token |
| 3279 | = create_async_event_handler (remote_async_inferior_event_handler, |
| 3280 | NULL); |
| 3281 | remote_async_get_pending_events_token |
| 3282 | = create_async_event_handler (remote_async_get_pending_events_handler, |
| 3283 | NULL); |
| 3284 | |
| 3285 | /* Reset the target state; these things will be queried either by |
| 3286 | remote_query_supported or as they are needed. */ |
| 3287 | init_all_packet_configs (); |
| 3288 | rs->cached_wait_status = 0; |
| 3289 | rs->explicit_packet_size = 0; |
| 3290 | rs->noack_mode = 0; |
| 3291 | rs->multi_process_aware = 0; |
| 3292 | rs->extended = extended_p; |
| 3293 | rs->non_stop_aware = 0; |
| 3294 | rs->waiting_for_stop_reply = 0; |
| 3295 | |
| 3296 | general_thread = not_sent_ptid; |
| 3297 | continue_thread = not_sent_ptid; |
| 3298 | |
| 3299 | /* Probe for ability to use "ThreadInfo" query, as required. */ |
| 3300 | use_threadinfo_query = 1; |
| 3301 | use_threadextra_query = 1; |
| 3302 | |
| 3303 | if (target_async_permitted) |
| 3304 | { |
| 3305 | /* With this target we start out by owning the terminal. */ |
| 3306 | remote_async_terminal_ours_p = 1; |
| 3307 | |
| 3308 | /* FIXME: cagney/1999-09-23: During the initial connection it is |
| 3309 | assumed that the target is already ready and able to respond to |
| 3310 | requests. Unfortunately remote_start_remote() eventually calls |
| 3311 | wait_for_inferior() with no timeout. wait_forever_enabled_p gets |
| 3312 | around this. Eventually a mechanism that allows |
| 3313 | wait_for_inferior() to expect/get timeouts will be |
| 3314 | implemented. */ |
| 3315 | wait_forever_enabled_p = 0; |
| 3316 | } |
| 3317 | |
| 3318 | /* First delete any symbols previously loaded from shared libraries. */ |
| 3319 | no_shared_libraries (NULL, 0); |
| 3320 | |
| 3321 | /* Start afresh. */ |
| 3322 | init_thread_list (); |
| 3323 | |
| 3324 | /* Start the remote connection. If error() or QUIT, discard this |
| 3325 | target (we'd otherwise be in an inconsistent state) and then |
| 3326 | propogate the error on up the exception chain. This ensures that |
| 3327 | the caller doesn't stumble along blindly assuming that the |
| 3328 | function succeeded. The CLI doesn't have this problem but other |
| 3329 | UI's, such as MI do. |
| 3330 | |
| 3331 | FIXME: cagney/2002-05-19: Instead of re-throwing the exception, |
| 3332 | this function should return an error indication letting the |
| 3333 | caller restore the previous state. Unfortunately the command |
| 3334 | ``target remote'' is directly wired to this function making that |
| 3335 | impossible. On a positive note, the CLI side of this problem has |
| 3336 | been fixed - the function set_cmd_context() makes it possible for |
| 3337 | all the ``target ....'' commands to share a common callback |
| 3338 | function. See cli-dump.c. */ |
| 3339 | { |
| 3340 | struct gdb_exception ex; |
| 3341 | struct start_remote_args args; |
| 3342 | |
| 3343 | args.from_tty = from_tty; |
| 3344 | args.target = target; |
| 3345 | args.extended_p = extended_p; |
| 3346 | |
| 3347 | ex = catch_exception (uiout, remote_start_remote, &args, RETURN_MASK_ALL); |
| 3348 | if (ex.reason < 0) |
| 3349 | { |
| 3350 | /* Pop the partially set up target - unless something else did |
| 3351 | already before throwing the exception. */ |
| 3352 | if (remote_desc != NULL) |
| 3353 | pop_target (); |
| 3354 | if (target_async_permitted) |
| 3355 | wait_forever_enabled_p = 1; |
| 3356 | throw_exception (ex); |
| 3357 | } |
| 3358 | } |
| 3359 | |
| 3360 | if (target_async_permitted) |
| 3361 | wait_forever_enabled_p = 1; |
| 3362 | } |
| 3363 | |
| 3364 | /* This takes a program previously attached to and detaches it. After |
| 3365 | this is done, GDB can be used to debug some other program. We |
| 3366 | better not have left any breakpoints in the target program or it'll |
| 3367 | die when it hits one. */ |
| 3368 | |
| 3369 | static void |
| 3370 | remote_detach_1 (char *args, int from_tty, int extended) |
| 3371 | { |
| 3372 | int pid = ptid_get_pid (inferior_ptid); |
| 3373 | struct remote_state *rs = get_remote_state (); |
| 3374 | |
| 3375 | if (args) |
| 3376 | error (_("Argument given to \"detach\" when remotely debugging.")); |
| 3377 | |
| 3378 | if (!target_has_execution) |
| 3379 | error (_("No process to detach from.")); |
| 3380 | |
| 3381 | /* Tell the remote target to detach. */ |
| 3382 | if (remote_multi_process_p (rs)) |
| 3383 | sprintf (rs->buf, "D;%x", pid); |
| 3384 | else |
| 3385 | strcpy (rs->buf, "D"); |
| 3386 | |
| 3387 | putpkt (rs->buf); |
| 3388 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 3389 | |
| 3390 | if (rs->buf[0] == 'O' && rs->buf[1] == 'K') |
| 3391 | ; |
| 3392 | else if (rs->buf[0] == '\0') |
| 3393 | error (_("Remote doesn't know how to detach")); |
| 3394 | else |
| 3395 | error (_("Can't detach process.")); |
| 3396 | |
| 3397 | if (from_tty) |
| 3398 | { |
| 3399 | if (remote_multi_process_p (rs)) |
| 3400 | printf_filtered (_("Detached from remote %s.\n"), |
| 3401 | target_pid_to_str (pid_to_ptid (pid))); |
| 3402 | else |
| 3403 | { |
| 3404 | if (extended) |
| 3405 | puts_filtered (_("Detached from remote process.\n")); |
| 3406 | else |
| 3407 | puts_filtered (_("Ending remote debugging.\n")); |
| 3408 | } |
| 3409 | } |
| 3410 | |
| 3411 | discard_pending_stop_replies (pid); |
| 3412 | target_mourn_inferior (); |
| 3413 | } |
| 3414 | |
| 3415 | static void |
| 3416 | remote_detach (struct target_ops *ops, char *args, int from_tty) |
| 3417 | { |
| 3418 | remote_detach_1 (args, from_tty, 0); |
| 3419 | } |
| 3420 | |
| 3421 | static void |
| 3422 | extended_remote_detach (struct target_ops *ops, char *args, int from_tty) |
| 3423 | { |
| 3424 | remote_detach_1 (args, from_tty, 1); |
| 3425 | } |
| 3426 | |
| 3427 | /* Same as remote_detach, but don't send the "D" packet; just disconnect. */ |
| 3428 | |
| 3429 | static void |
| 3430 | remote_disconnect (struct target_ops *target, char *args, int from_tty) |
| 3431 | { |
| 3432 | if (args) |
| 3433 | error (_("Argument given to \"disconnect\" when remotely debugging.")); |
| 3434 | |
| 3435 | /* Make sure we unpush even the extended remote targets; mourn |
| 3436 | won't do it. So call remote_mourn_1 directly instead of |
| 3437 | target_mourn_inferior. */ |
| 3438 | remote_mourn_1 (target); |
| 3439 | |
| 3440 | if (from_tty) |
| 3441 | puts_filtered ("Ending remote debugging.\n"); |
| 3442 | } |
| 3443 | |
| 3444 | /* Attach to the process specified by ARGS. If FROM_TTY is non-zero, |
| 3445 | be chatty about it. */ |
| 3446 | |
| 3447 | static void |
| 3448 | extended_remote_attach_1 (struct target_ops *target, char *args, int from_tty) |
| 3449 | { |
| 3450 | struct remote_state *rs = get_remote_state (); |
| 3451 | int pid; |
| 3452 | char *dummy; |
| 3453 | char *wait_status = NULL; |
| 3454 | |
| 3455 | if (!args) |
| 3456 | error_no_arg (_("process-id to attach")); |
| 3457 | |
| 3458 | dummy = args; |
| 3459 | pid = strtol (args, &dummy, 0); |
| 3460 | /* Some targets don't set errno on errors, grrr! */ |
| 3461 | if (pid == 0 && args == dummy) |
| 3462 | error (_("Illegal process-id: %s."), args); |
| 3463 | |
| 3464 | if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE) |
| 3465 | error (_("This target does not support attaching to a process")); |
| 3466 | |
| 3467 | sprintf (rs->buf, "vAttach;%x", pid); |
| 3468 | putpkt (rs->buf); |
| 3469 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 3470 | |
| 3471 | if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vAttach]) == PACKET_OK) |
| 3472 | { |
| 3473 | if (from_tty) |
| 3474 | printf_unfiltered (_("Attached to %s\n"), |
| 3475 | target_pid_to_str (pid_to_ptid (pid))); |
| 3476 | |
| 3477 | if (!non_stop) |
| 3478 | { |
| 3479 | /* Save the reply for later. */ |
| 3480 | wait_status = alloca (strlen (rs->buf) + 1); |
| 3481 | strcpy (wait_status, rs->buf); |
| 3482 | } |
| 3483 | else if (strcmp (rs->buf, "OK") != 0) |
| 3484 | error (_("Attaching to %s failed with: %s"), |
| 3485 | target_pid_to_str (pid_to_ptid (pid)), |
| 3486 | rs->buf); |
| 3487 | } |
| 3488 | else if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE) |
| 3489 | error (_("This target does not support attaching to a process")); |
| 3490 | else |
| 3491 | error (_("Attaching to %s failed"), |
| 3492 | target_pid_to_str (pid_to_ptid (pid))); |
| 3493 | |
| 3494 | remote_add_inferior (pid, 1); |
| 3495 | |
| 3496 | inferior_ptid = pid_to_ptid (pid); |
| 3497 | |
| 3498 | if (non_stop) |
| 3499 | { |
| 3500 | struct thread_info *thread; |
| 3501 | |
| 3502 | /* Get list of threads. */ |
| 3503 | remote_threads_info (target); |
| 3504 | |
| 3505 | thread = first_thread_of_process (pid); |
| 3506 | if (thread) |
| 3507 | inferior_ptid = thread->ptid; |
| 3508 | else |
| 3509 | inferior_ptid = pid_to_ptid (pid); |
| 3510 | |
| 3511 | /* Invalidate our notion of the remote current thread. */ |
| 3512 | record_currthread (minus_one_ptid); |
| 3513 | } |
| 3514 | else |
| 3515 | { |
| 3516 | /* Now, if we have thread information, update inferior_ptid. */ |
| 3517 | inferior_ptid = remote_current_thread (inferior_ptid); |
| 3518 | |
| 3519 | /* Add the main thread to the thread list. */ |
| 3520 | add_thread_silent (inferior_ptid); |
| 3521 | } |
| 3522 | |
| 3523 | /* Next, if the target can specify a description, read it. We do |
| 3524 | this before anything involving memory or registers. */ |
| 3525 | target_find_description (); |
| 3526 | |
| 3527 | if (!non_stop) |
| 3528 | { |
| 3529 | /* Use the previously fetched status. */ |
| 3530 | gdb_assert (wait_status != NULL); |
| 3531 | |
| 3532 | if (target_can_async_p ()) |
| 3533 | { |
| 3534 | struct stop_reply *stop_reply; |
| 3535 | struct cleanup *old_chain; |
| 3536 | |
| 3537 | stop_reply = stop_reply_xmalloc (); |
| 3538 | old_chain = make_cleanup (do_stop_reply_xfree, stop_reply); |
| 3539 | remote_parse_stop_reply (wait_status, stop_reply); |
| 3540 | discard_cleanups (old_chain); |
| 3541 | push_stop_reply (stop_reply); |
| 3542 | |
| 3543 | target_async (inferior_event_handler, 0); |
| 3544 | } |
| 3545 | else |
| 3546 | { |
| 3547 | gdb_assert (wait_status != NULL); |
| 3548 | strcpy (rs->buf, wait_status); |
| 3549 | rs->cached_wait_status = 1; |
| 3550 | } |
| 3551 | } |
| 3552 | else |
| 3553 | gdb_assert (wait_status == NULL); |
| 3554 | } |
| 3555 | |
| 3556 | static void |
| 3557 | extended_remote_attach (struct target_ops *ops, char *args, int from_tty) |
| 3558 | { |
| 3559 | extended_remote_attach_1 (ops, args, from_tty); |
| 3560 | } |
| 3561 | |
| 3562 | /* Convert hex digit A to a number. */ |
| 3563 | |
| 3564 | static int |
| 3565 | fromhex (int a) |
| 3566 | { |
| 3567 | if (a >= '0' && a <= '9') |
| 3568 | return a - '0'; |
| 3569 | else if (a >= 'a' && a <= 'f') |
| 3570 | return a - 'a' + 10; |
| 3571 | else if (a >= 'A' && a <= 'F') |
| 3572 | return a - 'A' + 10; |
| 3573 | else |
| 3574 | error (_("Reply contains invalid hex digit %d"), a); |
| 3575 | } |
| 3576 | |
| 3577 | static int |
| 3578 | hex2bin (const char *hex, gdb_byte *bin, int count) |
| 3579 | { |
| 3580 | int i; |
| 3581 | |
| 3582 | for (i = 0; i < count; i++) |
| 3583 | { |
| 3584 | if (hex[0] == 0 || hex[1] == 0) |
| 3585 | { |
| 3586 | /* Hex string is short, or of uneven length. |
| 3587 | Return the count that has been converted so far. */ |
| 3588 | return i; |
| 3589 | } |
| 3590 | *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); |
| 3591 | hex += 2; |
| 3592 | } |
| 3593 | return i; |
| 3594 | } |
| 3595 | |
| 3596 | /* Convert number NIB to a hex digit. */ |
| 3597 | |
| 3598 | static int |
| 3599 | tohex (int nib) |
| 3600 | { |
| 3601 | if (nib < 10) |
| 3602 | return '0' + nib; |
| 3603 | else |
| 3604 | return 'a' + nib - 10; |
| 3605 | } |
| 3606 | |
| 3607 | static int |
| 3608 | bin2hex (const gdb_byte *bin, char *hex, int count) |
| 3609 | { |
| 3610 | int i; |
| 3611 | /* May use a length, or a nul-terminated string as input. */ |
| 3612 | if (count == 0) |
| 3613 | count = strlen ((char *) bin); |
| 3614 | |
| 3615 | for (i = 0; i < count; i++) |
| 3616 | { |
| 3617 | *hex++ = tohex ((*bin >> 4) & 0xf); |
| 3618 | *hex++ = tohex (*bin++ & 0xf); |
| 3619 | } |
| 3620 | *hex = 0; |
| 3621 | return i; |
| 3622 | } |
| 3623 | \f |
| 3624 | /* Check for the availability of vCont. This function should also check |
| 3625 | the response. */ |
| 3626 | |
| 3627 | static void |
| 3628 | remote_vcont_probe (struct remote_state *rs) |
| 3629 | { |
| 3630 | char *buf; |
| 3631 | |
| 3632 | strcpy (rs->buf, "vCont?"); |
| 3633 | putpkt (rs->buf); |
| 3634 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 3635 | buf = rs->buf; |
| 3636 | |
| 3637 | /* Make sure that the features we assume are supported. */ |
| 3638 | if (strncmp (buf, "vCont", 5) == 0) |
| 3639 | { |
| 3640 | char *p = &buf[5]; |
| 3641 | int support_s, support_S, support_c, support_C; |
| 3642 | |
| 3643 | support_s = 0; |
| 3644 | support_S = 0; |
| 3645 | support_c = 0; |
| 3646 | support_C = 0; |
| 3647 | rs->support_vCont_t = 0; |
| 3648 | while (p && *p == ';') |
| 3649 | { |
| 3650 | p++; |
| 3651 | if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| 3652 | support_s = 1; |
| 3653 | else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| 3654 | support_S = 1; |
| 3655 | else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| 3656 | support_c = 1; |
| 3657 | else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| 3658 | support_C = 1; |
| 3659 | else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| 3660 | rs->support_vCont_t = 1; |
| 3661 | |
| 3662 | p = strchr (p, ';'); |
| 3663 | } |
| 3664 | |
| 3665 | /* If s, S, c, and C are not all supported, we can't use vCont. Clearing |
| 3666 | BUF will make packet_ok disable the packet. */ |
| 3667 | if (!support_s || !support_S || !support_c || !support_C) |
| 3668 | buf[0] = 0; |
| 3669 | } |
| 3670 | |
| 3671 | packet_ok (buf, &remote_protocol_packets[PACKET_vCont]); |
| 3672 | } |
| 3673 | |
| 3674 | /* Helper function for building "vCont" resumptions. Write a |
| 3675 | resumption to P. ENDP points to one-passed-the-end of the buffer |
| 3676 | we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The |
| 3677 | thread to be resumed is PTID; STEP and SIGGNAL indicate whether the |
| 3678 | resumed thread should be single-stepped and/or signalled. If PTID |
| 3679 | equals minus_one_ptid, then all threads are resumed; if PTID |
| 3680 | represents a process, then all threads of the process are resumed; |
| 3681 | the thread to be stepped and/or signalled is given in the global |
| 3682 | INFERIOR_PTID. */ |
| 3683 | |
| 3684 | static char * |
| 3685 | append_resumption (char *p, char *endp, |
| 3686 | ptid_t ptid, int step, enum target_signal siggnal) |
| 3687 | { |
| 3688 | struct remote_state *rs = get_remote_state (); |
| 3689 | |
| 3690 | if (step && siggnal != TARGET_SIGNAL_0) |
| 3691 | p += xsnprintf (p, endp - p, ";S%02x", siggnal); |
| 3692 | else if (step) |
| 3693 | p += xsnprintf (p, endp - p, ";s"); |
| 3694 | else if (siggnal != TARGET_SIGNAL_0) |
| 3695 | p += xsnprintf (p, endp - p, ";C%02x", siggnal); |
| 3696 | else |
| 3697 | p += xsnprintf (p, endp - p, ";c"); |
| 3698 | |
| 3699 | if (remote_multi_process_p (rs) && ptid_is_pid (ptid)) |
| 3700 | { |
| 3701 | ptid_t nptid; |
| 3702 | |
| 3703 | /* All (-1) threads of process. */ |
| 3704 | nptid = ptid_build (ptid_get_pid (ptid), 0, -1); |
| 3705 | |
| 3706 | p += xsnprintf (p, endp - p, ":"); |
| 3707 | p = write_ptid (p, endp, nptid); |
| 3708 | } |
| 3709 | else if (!ptid_equal (ptid, minus_one_ptid)) |
| 3710 | { |
| 3711 | p += xsnprintf (p, endp - p, ":"); |
| 3712 | p = write_ptid (p, endp, ptid); |
| 3713 | } |
| 3714 | |
| 3715 | return p; |
| 3716 | } |
| 3717 | |
| 3718 | /* Resume the remote inferior by using a "vCont" packet. The thread |
| 3719 | to be resumed is PTID; STEP and SIGGNAL indicate whether the |
| 3720 | resumed thread should be single-stepped and/or signalled. If PTID |
| 3721 | equals minus_one_ptid, then all threads are resumed; the thread to |
| 3722 | be stepped and/or signalled is given in the global INFERIOR_PTID. |
| 3723 | This function returns non-zero iff it resumes the inferior. |
| 3724 | |
| 3725 | This function issues a strict subset of all possible vCont commands at the |
| 3726 | moment. */ |
| 3727 | |
| 3728 | static int |
| 3729 | remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal) |
| 3730 | { |
| 3731 | struct remote_state *rs = get_remote_state (); |
| 3732 | char *p; |
| 3733 | char *endp; |
| 3734 | |
| 3735 | if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN) |
| 3736 | remote_vcont_probe (rs); |
| 3737 | |
| 3738 | if (remote_protocol_packets[PACKET_vCont].support == PACKET_DISABLE) |
| 3739 | return 0; |
| 3740 | |
| 3741 | p = rs->buf; |
| 3742 | endp = rs->buf + get_remote_packet_size (); |
| 3743 | |
| 3744 | /* If we could generate a wider range of packets, we'd have to worry |
| 3745 | about overflowing BUF. Should there be a generic |
| 3746 | "multi-part-packet" packet? */ |
| 3747 | |
| 3748 | p += xsnprintf (p, endp - p, "vCont"); |
| 3749 | |
| 3750 | if (ptid_equal (ptid, magic_null_ptid)) |
| 3751 | { |
| 3752 | /* MAGIC_NULL_PTID means that we don't have any active threads, |
| 3753 | so we don't have any TID numbers the inferior will |
| 3754 | understand. Make sure to only send forms that do not specify |
| 3755 | a TID. */ |
| 3756 | p = append_resumption (p, endp, minus_one_ptid, step, siggnal); |
| 3757 | } |
| 3758 | else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid)) |
| 3759 | { |
| 3760 | /* Resume all threads (of all processes, or of a single |
| 3761 | process), with preference for INFERIOR_PTID. This assumes |
| 3762 | inferior_ptid belongs to the set of all threads we are about |
| 3763 | to resume. */ |
| 3764 | if (step || siggnal != TARGET_SIGNAL_0) |
| 3765 | { |
| 3766 | /* Step inferior_ptid, with or without signal. */ |
| 3767 | p = append_resumption (p, endp, inferior_ptid, step, siggnal); |
| 3768 | } |
| 3769 | |
| 3770 | /* And continue others without a signal. */ |
| 3771 | p = append_resumption (p, endp, ptid, /*step=*/ 0, TARGET_SIGNAL_0); |
| 3772 | } |
| 3773 | else |
| 3774 | { |
| 3775 | /* Scheduler locking; resume only PTID. */ |
| 3776 | p = append_resumption (p, endp, ptid, step, siggnal); |
| 3777 | } |
| 3778 | |
| 3779 | gdb_assert (strlen (rs->buf) < get_remote_packet_size ()); |
| 3780 | putpkt (rs->buf); |
| 3781 | |
| 3782 | if (non_stop) |
| 3783 | { |
| 3784 | /* In non-stop, the stub replies to vCont with "OK". The stop |
| 3785 | reply will be reported asynchronously by means of a `%Stop' |
| 3786 | notification. */ |
| 3787 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 3788 | if (strcmp (rs->buf, "OK") != 0) |
| 3789 | error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf); |
| 3790 | } |
| 3791 | |
| 3792 | return 1; |
| 3793 | } |
| 3794 | |
| 3795 | /* Tell the remote machine to resume. */ |
| 3796 | |
| 3797 | static enum target_signal last_sent_signal = TARGET_SIGNAL_0; |
| 3798 | |
| 3799 | static int last_sent_step; |
| 3800 | |
| 3801 | static void |
| 3802 | remote_resume (struct target_ops *ops, |
| 3803 | ptid_t ptid, int step, enum target_signal siggnal) |
| 3804 | { |
| 3805 | struct remote_state *rs = get_remote_state (); |
| 3806 | char *buf; |
| 3807 | |
| 3808 | last_sent_signal = siggnal; |
| 3809 | last_sent_step = step; |
| 3810 | |
| 3811 | /* Update the inferior on signals to silently pass, if they've changed. */ |
| 3812 | remote_pass_signals (); |
| 3813 | |
| 3814 | /* The vCont packet doesn't need to specify threads via Hc. */ |
| 3815 | if (remote_vcont_resume (ptid, step, siggnal)) |
| 3816 | goto done; |
| 3817 | |
| 3818 | /* All other supported resume packets do use Hc, so set the continue |
| 3819 | thread. */ |
| 3820 | if (ptid_equal (ptid, minus_one_ptid)) |
| 3821 | set_continue_thread (any_thread_ptid); |
| 3822 | else |
| 3823 | set_continue_thread (ptid); |
| 3824 | |
| 3825 | buf = rs->buf; |
| 3826 | if (execution_direction == EXEC_REVERSE) |
| 3827 | { |
| 3828 | /* We don't pass signals to the target in reverse exec mode. */ |
| 3829 | if (info_verbose && siggnal != TARGET_SIGNAL_0) |
| 3830 | warning (" - Can't pass signal %d to target in reverse: ignored.\n", |
| 3831 | siggnal); |
| 3832 | strcpy (buf, step ? "bs" : "bc"); |
| 3833 | } |
| 3834 | else if (siggnal != TARGET_SIGNAL_0) |
| 3835 | { |
| 3836 | buf[0] = step ? 'S' : 'C'; |
| 3837 | buf[1] = tohex (((int) siggnal >> 4) & 0xf); |
| 3838 | buf[2] = tohex (((int) siggnal) & 0xf); |
| 3839 | buf[3] = '\0'; |
| 3840 | } |
| 3841 | else |
| 3842 | strcpy (buf, step ? "s" : "c"); |
| 3843 | |
| 3844 | putpkt (buf); |
| 3845 | |
| 3846 | done: |
| 3847 | /* We are about to start executing the inferior, let's register it |
| 3848 | with the event loop. NOTE: this is the one place where all the |
| 3849 | execution commands end up. We could alternatively do this in each |
| 3850 | of the execution commands in infcmd.c. */ |
| 3851 | /* FIXME: ezannoni 1999-09-28: We may need to move this out of here |
| 3852 | into infcmd.c in order to allow inferior function calls to work |
| 3853 | NOT asynchronously. */ |
| 3854 | if (target_can_async_p ()) |
| 3855 | target_async (inferior_event_handler, 0); |
| 3856 | |
| 3857 | /* We've just told the target to resume. The remote server will |
| 3858 | wait for the inferior to stop, and then send a stop reply. In |
| 3859 | the mean time, we can't start another command/query ourselves |
| 3860 | because the stub wouldn't be ready to process it. This applies |
| 3861 | only to the base all-stop protocol, however. In non-stop (which |
| 3862 | only supports vCont), the stub replies with an "OK", and is |
| 3863 | immediate able to process further serial input. */ |
| 3864 | if (!non_stop) |
| 3865 | rs->waiting_for_stop_reply = 1; |
| 3866 | } |
| 3867 | \f |
| 3868 | |
| 3869 | /* Set up the signal handler for SIGINT, while the target is |
| 3870 | executing, ovewriting the 'regular' SIGINT signal handler. */ |
| 3871 | static void |
| 3872 | initialize_sigint_signal_handler (void) |
| 3873 | { |
| 3874 | signal (SIGINT, handle_remote_sigint); |
| 3875 | } |
| 3876 | |
| 3877 | /* Signal handler for SIGINT, while the target is executing. */ |
| 3878 | static void |
| 3879 | handle_remote_sigint (int sig) |
| 3880 | { |
| 3881 | signal (sig, handle_remote_sigint_twice); |
| 3882 | mark_async_signal_handler_wrapper (sigint_remote_token); |
| 3883 | } |
| 3884 | |
| 3885 | /* Signal handler for SIGINT, installed after SIGINT has already been |
| 3886 | sent once. It will take effect the second time that the user sends |
| 3887 | a ^C. */ |
| 3888 | static void |
| 3889 | handle_remote_sigint_twice (int sig) |
| 3890 | { |
| 3891 | signal (sig, handle_remote_sigint); |
| 3892 | mark_async_signal_handler_wrapper (sigint_remote_twice_token); |
| 3893 | } |
| 3894 | |
| 3895 | /* Perform the real interruption of the target execution, in response |
| 3896 | to a ^C. */ |
| 3897 | static void |
| 3898 | async_remote_interrupt (gdb_client_data arg) |
| 3899 | { |
| 3900 | if (remote_debug) |
| 3901 | fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); |
| 3902 | |
| 3903 | target_stop (inferior_ptid); |
| 3904 | } |
| 3905 | |
| 3906 | /* Perform interrupt, if the first attempt did not succeed. Just give |
| 3907 | up on the target alltogether. */ |
| 3908 | void |
| 3909 | async_remote_interrupt_twice (gdb_client_data arg) |
| 3910 | { |
| 3911 | if (remote_debug) |
| 3912 | fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n"); |
| 3913 | |
| 3914 | interrupt_query (); |
| 3915 | } |
| 3916 | |
| 3917 | /* Reinstall the usual SIGINT handlers, after the target has |
| 3918 | stopped. */ |
| 3919 | static void |
| 3920 | cleanup_sigint_signal_handler (void *dummy) |
| 3921 | { |
| 3922 | signal (SIGINT, handle_sigint); |
| 3923 | } |
| 3924 | |
| 3925 | /* Send ^C to target to halt it. Target will respond, and send us a |
| 3926 | packet. */ |
| 3927 | static void (*ofunc) (int); |
| 3928 | |
| 3929 | /* The command line interface's stop routine. This function is installed |
| 3930 | as a signal handler for SIGINT. The first time a user requests a |
| 3931 | stop, we call remote_stop to send a break or ^C. If there is no |
| 3932 | response from the target (it didn't stop when the user requested it), |
| 3933 | we ask the user if he'd like to detach from the target. */ |
| 3934 | static void |
| 3935 | remote_interrupt (int signo) |
| 3936 | { |
| 3937 | /* If this doesn't work, try more severe steps. */ |
| 3938 | signal (signo, remote_interrupt_twice); |
| 3939 | |
| 3940 | gdb_call_async_signal_handler (sigint_remote_token, 1); |
| 3941 | } |
| 3942 | |
| 3943 | /* The user typed ^C twice. */ |
| 3944 | |
| 3945 | static void |
| 3946 | remote_interrupt_twice (int signo) |
| 3947 | { |
| 3948 | signal (signo, ofunc); |
| 3949 | gdb_call_async_signal_handler (sigint_remote_twice_token, 1); |
| 3950 | signal (signo, remote_interrupt); |
| 3951 | } |
| 3952 | |
| 3953 | /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote |
| 3954 | thread, all threads of a remote process, or all threads of all |
| 3955 | processes. */ |
| 3956 | |
| 3957 | static void |
| 3958 | remote_stop_ns (ptid_t ptid) |
| 3959 | { |
| 3960 | struct remote_state *rs = get_remote_state (); |
| 3961 | char *p = rs->buf; |
| 3962 | char *endp = rs->buf + get_remote_packet_size (); |
| 3963 | struct stop_reply *reply, *next; |
| 3964 | |
| 3965 | if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN) |
| 3966 | remote_vcont_probe (rs); |
| 3967 | |
| 3968 | if (!rs->support_vCont_t) |
| 3969 | error (_("Remote server does not support stopping threads")); |
| 3970 | |
| 3971 | if (ptid_equal (ptid, minus_one_ptid) |
| 3972 | || (!remote_multi_process_p (rs) && ptid_is_pid (ptid))) |
| 3973 | p += xsnprintf (p, endp - p, "vCont;t"); |
| 3974 | else |
| 3975 | { |
| 3976 | ptid_t nptid; |
| 3977 | |
| 3978 | p += xsnprintf (p, endp - p, "vCont;t:"); |
| 3979 | |
| 3980 | if (ptid_is_pid (ptid)) |
| 3981 | /* All (-1) threads of process. */ |
| 3982 | nptid = ptid_build (ptid_get_pid (ptid), 0, -1); |
| 3983 | else |
| 3984 | { |
| 3985 | /* Small optimization: if we already have a stop reply for |
| 3986 | this thread, no use in telling the stub we want this |
| 3987 | stopped. */ |
| 3988 | if (peek_stop_reply (ptid)) |
| 3989 | return; |
| 3990 | |
| 3991 | nptid = ptid; |
| 3992 | } |
| 3993 | |
| 3994 | p = write_ptid (p, endp, nptid); |
| 3995 | } |
| 3996 | |
| 3997 | /* In non-stop, we get an immediate OK reply. The stop reply will |
| 3998 | come in asynchronously by notification. */ |
| 3999 | putpkt (rs->buf); |
| 4000 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 4001 | if (strcmp (rs->buf, "OK") != 0) |
| 4002 | error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf); |
| 4003 | } |
| 4004 | |
| 4005 | /* All-stop version of target_stop. Sends a break or a ^C to stop the |
| 4006 | remote target. It is undefined which thread of which process |
| 4007 | reports the stop. */ |
| 4008 | |
| 4009 | static void |
| 4010 | remote_stop_as (ptid_t ptid) |
| 4011 | { |
| 4012 | struct remote_state *rs = get_remote_state (); |
| 4013 | |
| 4014 | /* If the inferior is stopped already, but the core didn't know |
| 4015 | about it yet, just ignore the request. The cached wait status |
| 4016 | will be collected in remote_wait. */ |
| 4017 | if (rs->cached_wait_status) |
| 4018 | return; |
| 4019 | |
| 4020 | /* Send a break or a ^C, depending on user preference. */ |
| 4021 | |
| 4022 | if (remote_break) |
| 4023 | serial_send_break (remote_desc); |
| 4024 | else |
| 4025 | serial_write (remote_desc, "\003", 1); |
| 4026 | } |
| 4027 | |
| 4028 | /* This is the generic stop called via the target vector. When a target |
| 4029 | interrupt is requested, either by the command line or the GUI, we |
| 4030 | will eventually end up here. */ |
| 4031 | |
| 4032 | static void |
| 4033 | remote_stop (ptid_t ptid) |
| 4034 | { |
| 4035 | if (remote_debug) |
| 4036 | fprintf_unfiltered (gdb_stdlog, "remote_stop called\n"); |
| 4037 | |
| 4038 | if (non_stop) |
| 4039 | remote_stop_ns (ptid); |
| 4040 | else |
| 4041 | remote_stop_as (ptid); |
| 4042 | } |
| 4043 | |
| 4044 | /* Ask the user what to do when an interrupt is received. */ |
| 4045 | |
| 4046 | static void |
| 4047 | interrupt_query (void) |
| 4048 | { |
| 4049 | target_terminal_ours (); |
| 4050 | |
| 4051 | if (target_can_async_p ()) |
| 4052 | { |
| 4053 | signal (SIGINT, handle_sigint); |
| 4054 | deprecated_throw_reason (RETURN_QUIT); |
| 4055 | } |
| 4056 | else |
| 4057 | { |
| 4058 | if (query (_("Interrupted while waiting for the program.\n\ |
| 4059 | Give up (and stop debugging it)? "))) |
| 4060 | { |
| 4061 | pop_target (); |
| 4062 | deprecated_throw_reason (RETURN_QUIT); |
| 4063 | } |
| 4064 | } |
| 4065 | |
| 4066 | target_terminal_inferior (); |
| 4067 | } |
| 4068 | |
| 4069 | /* Enable/disable target terminal ownership. Most targets can use |
| 4070 | terminal groups to control terminal ownership. Remote targets are |
| 4071 | different in that explicit transfer of ownership to/from GDB/target |
| 4072 | is required. */ |
| 4073 | |
| 4074 | static void |
| 4075 | remote_terminal_inferior (void) |
| 4076 | { |
| 4077 | if (!target_async_permitted) |
| 4078 | /* Nothing to do. */ |
| 4079 | return; |
| 4080 | |
| 4081 | /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*() |
| 4082 | idempotent. The event-loop GDB talking to an asynchronous target |
| 4083 | with a synchronous command calls this function from both |
| 4084 | event-top.c and infrun.c/infcmd.c. Once GDB stops trying to |
| 4085 | transfer the terminal to the target when it shouldn't this guard |
| 4086 | can go away. */ |
| 4087 | if (!remote_async_terminal_ours_p) |
| 4088 | return; |
| 4089 | delete_file_handler (input_fd); |
| 4090 | remote_async_terminal_ours_p = 0; |
| 4091 | initialize_sigint_signal_handler (); |
| 4092 | /* NOTE: At this point we could also register our selves as the |
| 4093 | recipient of all input. Any characters typed could then be |
| 4094 | passed on down to the target. */ |
| 4095 | } |
| 4096 | |
| 4097 | static void |
| 4098 | remote_terminal_ours (void) |
| 4099 | { |
| 4100 | if (!target_async_permitted) |
| 4101 | /* Nothing to do. */ |
| 4102 | return; |
| 4103 | |
| 4104 | /* See FIXME in remote_terminal_inferior. */ |
| 4105 | if (remote_async_terminal_ours_p) |
| 4106 | return; |
| 4107 | cleanup_sigint_signal_handler (NULL); |
| 4108 | add_file_handler (input_fd, stdin_event_handler, 0); |
| 4109 | remote_async_terminal_ours_p = 1; |
| 4110 | } |
| 4111 | |
| 4112 | void |
| 4113 | remote_console_output (char *msg) |
| 4114 | { |
| 4115 | char *p; |
| 4116 | |
| 4117 | for (p = msg; p[0] && p[1]; p += 2) |
| 4118 | { |
| 4119 | char tb[2]; |
| 4120 | char c = fromhex (p[0]) * 16 + fromhex (p[1]); |
| 4121 | tb[0] = c; |
| 4122 | tb[1] = 0; |
| 4123 | fputs_unfiltered (tb, gdb_stdtarg); |
| 4124 | } |
| 4125 | gdb_flush (gdb_stdtarg); |
| 4126 | } |
| 4127 | |
| 4128 | typedef struct cached_reg |
| 4129 | { |
| 4130 | int num; |
| 4131 | gdb_byte data[MAX_REGISTER_SIZE]; |
| 4132 | } cached_reg_t; |
| 4133 | |
| 4134 | DEF_VEC_O(cached_reg_t); |
| 4135 | |
| 4136 | struct stop_reply |
| 4137 | { |
| 4138 | struct stop_reply *next; |
| 4139 | |
| 4140 | ptid_t ptid; |
| 4141 | |
| 4142 | struct target_waitstatus ws; |
| 4143 | |
| 4144 | VEC(cached_reg_t) *regcache; |
| 4145 | |
| 4146 | int stopped_by_watchpoint_p; |
| 4147 | CORE_ADDR watch_data_address; |
| 4148 | |
| 4149 | int solibs_changed; |
| 4150 | int replay_event; |
| 4151 | }; |
| 4152 | |
| 4153 | /* The list of already fetched and acknowledged stop events. */ |
| 4154 | static struct stop_reply *stop_reply_queue; |
| 4155 | |
| 4156 | static struct stop_reply * |
| 4157 | stop_reply_xmalloc (void) |
| 4158 | { |
| 4159 | struct stop_reply *r = XMALLOC (struct stop_reply); |
| 4160 | r->next = NULL; |
| 4161 | return r; |
| 4162 | } |
| 4163 | |
| 4164 | static void |
| 4165 | stop_reply_xfree (struct stop_reply *r) |
| 4166 | { |
| 4167 | if (r != NULL) |
| 4168 | { |
| 4169 | VEC_free (cached_reg_t, r->regcache); |
| 4170 | xfree (r); |
| 4171 | } |
| 4172 | } |
| 4173 | |
| 4174 | /* Discard all pending stop replies of inferior PID. If PID is -1, |
| 4175 | discard everything. */ |
| 4176 | |
| 4177 | static void |
| 4178 | discard_pending_stop_replies (int pid) |
| 4179 | { |
| 4180 | struct stop_reply *prev = NULL, *reply, *next; |
| 4181 | |
| 4182 | /* Discard the in-flight notification. */ |
| 4183 | if (pending_stop_reply != NULL |
| 4184 | && (pid == -1 |
| 4185 | || ptid_get_pid (pending_stop_reply->ptid) == pid)) |
| 4186 | { |
| 4187 | stop_reply_xfree (pending_stop_reply); |
| 4188 | pending_stop_reply = NULL; |
| 4189 | } |
| 4190 | |
| 4191 | /* Discard the stop replies we have already pulled with |
| 4192 | vStopped. */ |
| 4193 | for (reply = stop_reply_queue; reply; reply = next) |
| 4194 | { |
| 4195 | next = reply->next; |
| 4196 | if (pid == -1 |
| 4197 | || ptid_get_pid (reply->ptid) == pid) |
| 4198 | { |
| 4199 | if (reply == stop_reply_queue) |
| 4200 | stop_reply_queue = reply->next; |
| 4201 | else |
| 4202 | prev->next = reply->next; |
| 4203 | |
| 4204 | stop_reply_xfree (reply); |
| 4205 | } |
| 4206 | else |
| 4207 | prev = reply; |
| 4208 | } |
| 4209 | } |
| 4210 | |
| 4211 | /* Cleanup wrapper. */ |
| 4212 | |
| 4213 | static void |
| 4214 | do_stop_reply_xfree (void *arg) |
| 4215 | { |
| 4216 | struct stop_reply *r = arg; |
| 4217 | stop_reply_xfree (r); |
| 4218 | } |
| 4219 | |
| 4220 | /* Look for a queued stop reply belonging to PTID. If one is found, |
| 4221 | remove it from the queue, and return it. Returns NULL if none is |
| 4222 | found. If there are still queued events left to process, tell the |
| 4223 | event loop to get back to target_wait soon. */ |
| 4224 | |
| 4225 | static struct stop_reply * |
| 4226 | queued_stop_reply (ptid_t ptid) |
| 4227 | { |
| 4228 | struct stop_reply *it, *prev; |
| 4229 | struct stop_reply head; |
| 4230 | |
| 4231 | head.next = stop_reply_queue; |
| 4232 | prev = &head; |
| 4233 | |
| 4234 | it = head.next; |
| 4235 | |
| 4236 | if (!ptid_equal (ptid, minus_one_ptid)) |
| 4237 | for (; it; prev = it, it = it->next) |
| 4238 | if (ptid_equal (ptid, it->ptid)) |
| 4239 | break; |
| 4240 | |
| 4241 | if (it) |
| 4242 | { |
| 4243 | prev->next = it->next; |
| 4244 | it->next = NULL; |
| 4245 | } |
| 4246 | |
| 4247 | stop_reply_queue = head.next; |
| 4248 | |
| 4249 | if (stop_reply_queue) |
| 4250 | /* There's still at least an event left. */ |
| 4251 | mark_async_event_handler (remote_async_inferior_event_token); |
| 4252 | |
| 4253 | return it; |
| 4254 | } |
| 4255 | |
| 4256 | /* Push a fully parsed stop reply in the stop reply queue. Since we |
| 4257 | know that we now have at least one queued event left to pass to the |
| 4258 | core side, tell the event loop to get back to target_wait soon. */ |
| 4259 | |
| 4260 | static void |
| 4261 | push_stop_reply (struct stop_reply *new_event) |
| 4262 | { |
| 4263 | struct stop_reply *event; |
| 4264 | |
| 4265 | if (stop_reply_queue) |
| 4266 | { |
| 4267 | for (event = stop_reply_queue; |
| 4268 | event && event->next; |
| 4269 | event = event->next) |
| 4270 | ; |
| 4271 | |
| 4272 | event->next = new_event; |
| 4273 | } |
| 4274 | else |
| 4275 | stop_reply_queue = new_event; |
| 4276 | |
| 4277 | mark_async_event_handler (remote_async_inferior_event_token); |
| 4278 | } |
| 4279 | |
| 4280 | /* Returns true if we have a stop reply for PTID. */ |
| 4281 | |
| 4282 | static int |
| 4283 | peek_stop_reply (ptid_t ptid) |
| 4284 | { |
| 4285 | struct stop_reply *it; |
| 4286 | |
| 4287 | for (it = stop_reply_queue; it; it = it->next) |
| 4288 | if (ptid_equal (ptid, it->ptid)) |
| 4289 | { |
| 4290 | if (it->ws.kind == TARGET_WAITKIND_STOPPED) |
| 4291 | return 1; |
| 4292 | } |
| 4293 | |
| 4294 | return 0; |
| 4295 | } |
| 4296 | |
| 4297 | /* Parse the stop reply in BUF. Either the function succeeds, and the |
| 4298 | result is stored in EVENT, or throws an error. */ |
| 4299 | |
| 4300 | static void |
| 4301 | remote_parse_stop_reply (char *buf, struct stop_reply *event) |
| 4302 | { |
| 4303 | struct remote_arch_state *rsa = get_remote_arch_state (); |
| 4304 | ULONGEST addr; |
| 4305 | char *p; |
| 4306 | |
| 4307 | event->ptid = null_ptid; |
| 4308 | event->ws.kind = TARGET_WAITKIND_IGNORE; |
| 4309 | event->ws.value.integer = 0; |
| 4310 | event->solibs_changed = 0; |
| 4311 | event->replay_event = 0; |
| 4312 | event->stopped_by_watchpoint_p = 0; |
| 4313 | event->regcache = NULL; |
| 4314 | |
| 4315 | switch (buf[0]) |
| 4316 | { |
| 4317 | case 'T': /* Status with PC, SP, FP, ... */ |
| 4318 | { |
| 4319 | gdb_byte regs[MAX_REGISTER_SIZE]; |
| 4320 | |
| 4321 | /* Expedited reply, containing Signal, {regno, reg} repeat. */ |
| 4322 | /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where |
| 4323 | ss = signal number |
| 4324 | n... = register number |
| 4325 | r... = register contents |
| 4326 | */ |
| 4327 | |
| 4328 | p = &buf[3]; /* after Txx */ |
| 4329 | while (*p) |
| 4330 | { |
| 4331 | char *p1; |
| 4332 | char *p_temp; |
| 4333 | int fieldsize; |
| 4334 | LONGEST pnum = 0; |
| 4335 | |
| 4336 | /* If the packet contains a register number, save it in |
| 4337 | pnum and set p1 to point to the character following it. |
| 4338 | Otherwise p1 points to p. */ |
| 4339 | |
| 4340 | /* If this packet is an awatch packet, don't parse the 'a' |
| 4341 | as a register number. */ |
| 4342 | |
| 4343 | if (strncmp (p, "awatch", strlen("awatch")) != 0) |
| 4344 | { |
| 4345 | /* Read the ``P'' register number. */ |
| 4346 | pnum = strtol (p, &p_temp, 16); |
| 4347 | p1 = p_temp; |
| 4348 | } |
| 4349 | else |
| 4350 | p1 = p; |
| 4351 | |
| 4352 | if (p1 == p) /* No register number present here. */ |
| 4353 | { |
| 4354 | p1 = strchr (p, ':'); |
| 4355 | if (p1 == NULL) |
| 4356 | error (_("Malformed packet(a) (missing colon): %s\n\ |
| 4357 | Packet: '%s'\n"), |
| 4358 | p, buf); |
| 4359 | if (strncmp (p, "thread", p1 - p) == 0) |
| 4360 | event->ptid = read_ptid (++p1, &p); |
| 4361 | else if ((strncmp (p, "watch", p1 - p) == 0) |
| 4362 | || (strncmp (p, "rwatch", p1 - p) == 0) |
| 4363 | || (strncmp (p, "awatch", p1 - p) == 0)) |
| 4364 | { |
| 4365 | event->stopped_by_watchpoint_p = 1; |
| 4366 | p = unpack_varlen_hex (++p1, &addr); |
| 4367 | event->watch_data_address = (CORE_ADDR) addr; |
| 4368 | } |
| 4369 | else if (strncmp (p, "library", p1 - p) == 0) |
| 4370 | { |
| 4371 | p1++; |
| 4372 | p_temp = p1; |
| 4373 | while (*p_temp && *p_temp != ';') |
| 4374 | p_temp++; |
| 4375 | |
| 4376 | event->solibs_changed = 1; |
| 4377 | p = p_temp; |
| 4378 | } |
| 4379 | else if (strncmp (p, "replaylog", p1 - p) == 0) |
| 4380 | { |
| 4381 | /* NO_HISTORY event. |
| 4382 | p1 will indicate "begin" or "end", but |
| 4383 | it makes no difference for now, so ignore it. */ |
| 4384 | event->replay_event = 1; |
| 4385 | p_temp = strchr (p1 + 1, ';'); |
| 4386 | if (p_temp) |
| 4387 | p = p_temp; |
| 4388 | } |
| 4389 | else |
| 4390 | { |
| 4391 | /* Silently skip unknown optional info. */ |
| 4392 | p_temp = strchr (p1 + 1, ';'); |
| 4393 | if (p_temp) |
| 4394 | p = p_temp; |
| 4395 | } |
| 4396 | } |
| 4397 | else |
| 4398 | { |
| 4399 | struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum); |
| 4400 | cached_reg_t cached_reg; |
| 4401 | |
| 4402 | p = p1; |
| 4403 | |
| 4404 | if (*p != ':') |
| 4405 | error (_("Malformed packet(b) (missing colon): %s\n\ |
| 4406 | Packet: '%s'\n"), |
| 4407 | p, buf); |
| 4408 | ++p; |
| 4409 | |
| 4410 | if (reg == NULL) |
| 4411 | error (_("Remote sent bad register number %s: %s\n\ |
| 4412 | Packet: '%s'\n"), |
| 4413 | phex_nz (pnum, 0), p, buf); |
| 4414 | |
| 4415 | cached_reg.num = reg->regnum; |
| 4416 | |
| 4417 | fieldsize = hex2bin (p, cached_reg.data, |
| 4418 | register_size (target_gdbarch, |
| 4419 | reg->regnum)); |
| 4420 | p += 2 * fieldsize; |
| 4421 | if (fieldsize < register_size (target_gdbarch, |
| 4422 | reg->regnum)) |
| 4423 | warning (_("Remote reply is too short: %s"), buf); |
| 4424 | |
| 4425 | VEC_safe_push (cached_reg_t, event->regcache, &cached_reg); |
| 4426 | } |
| 4427 | |
| 4428 | if (*p != ';') |
| 4429 | error (_("Remote register badly formatted: %s\nhere: %s"), |
| 4430 | buf, p); |
| 4431 | ++p; |
| 4432 | } |
| 4433 | } |
| 4434 | /* fall through */ |
| 4435 | case 'S': /* Old style status, just signal only. */ |
| 4436 | if (event->solibs_changed) |
| 4437 | event->ws.kind = TARGET_WAITKIND_LOADED; |
| 4438 | else if (event->replay_event) |
| 4439 | event->ws.kind = TARGET_WAITKIND_NO_HISTORY; |
| 4440 | else |
| 4441 | { |
| 4442 | event->ws.kind = TARGET_WAITKIND_STOPPED; |
| 4443 | event->ws.value.sig = (enum target_signal) |
| 4444 | (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); |
| 4445 | } |
| 4446 | break; |
| 4447 | case 'W': /* Target exited. */ |
| 4448 | case 'X': |
| 4449 | { |
| 4450 | char *p; |
| 4451 | int pid; |
| 4452 | ULONGEST value; |
| 4453 | |
| 4454 | /* GDB used to accept only 2 hex chars here. Stubs should |
| 4455 | only send more if they detect GDB supports multi-process |
| 4456 | support. */ |
| 4457 | p = unpack_varlen_hex (&buf[1], &value); |
| 4458 | |
| 4459 | if (buf[0] == 'W') |
| 4460 | { |
| 4461 | /* The remote process exited. */ |
| 4462 | event->ws.kind = TARGET_WAITKIND_EXITED; |
| 4463 | event->ws.value.integer = value; |
| 4464 | } |
| 4465 | else |
| 4466 | { |
| 4467 | /* The remote process exited with a signal. */ |
| 4468 | event->ws.kind = TARGET_WAITKIND_SIGNALLED; |
| 4469 | event->ws.value.sig = (enum target_signal) value; |
| 4470 | } |
| 4471 | |
| 4472 | /* If no process is specified, assume inferior_ptid. */ |
| 4473 | pid = ptid_get_pid (inferior_ptid); |
| 4474 | if (*p == '\0') |
| 4475 | ; |
| 4476 | else if (*p == ';') |
| 4477 | { |
| 4478 | p++; |
| 4479 | |
| 4480 | if (p == '\0') |
| 4481 | ; |
| 4482 | else if (strncmp (p, |
| 4483 | "process:", sizeof ("process:") - 1) == 0) |
| 4484 | { |
| 4485 | ULONGEST upid; |
| 4486 | p += sizeof ("process:") - 1; |
| 4487 | unpack_varlen_hex (p, &upid); |
| 4488 | pid = upid; |
| 4489 | } |
| 4490 | else |
| 4491 | error (_("unknown stop reply packet: %s"), buf); |
| 4492 | } |
| 4493 | else |
| 4494 | error (_("unknown stop reply packet: %s"), buf); |
| 4495 | event->ptid = pid_to_ptid (pid); |
| 4496 | } |
| 4497 | break; |
| 4498 | } |
| 4499 | |
| 4500 | if (non_stop && ptid_equal (event->ptid, null_ptid)) |
| 4501 | error (_("No process or thread specified in stop reply: %s"), buf); |
| 4502 | } |
| 4503 | |
| 4504 | /* When the stub wants to tell GDB about a new stop reply, it sends a |
| 4505 | stop notification (%Stop). Those can come it at any time, hence, |
| 4506 | we have to make sure that any pending putpkt/getpkt sequence we're |
| 4507 | making is finished, before querying the stub for more events with |
| 4508 | vStopped. E.g., if we started a vStopped sequence immediatelly |
| 4509 | upon receiving the %Stop notification, something like this could |
| 4510 | happen: |
| 4511 | |
| 4512 | 1.1) --> Hg 1 |
| 4513 | 1.2) <-- OK |
| 4514 | 1.3) --> g |
| 4515 | 1.4) <-- %Stop |
| 4516 | 1.5) --> vStopped |
| 4517 | 1.6) <-- (registers reply to step #1.3) |
| 4518 | |
| 4519 | Obviously, the reply in step #1.6 would be unexpected to a vStopped |
| 4520 | query. |
| 4521 | |
| 4522 | To solve this, whenever we parse a %Stop notification sucessfully, |
| 4523 | we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on |
| 4524 | doing whatever we were doing: |
| 4525 | |
| 4526 | 2.1) --> Hg 1 |
| 4527 | 2.2) <-- OK |
| 4528 | 2.3) --> g |
| 4529 | 2.4) <-- %Stop |
| 4530 | <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN> |
| 4531 | 2.5) <-- (registers reply to step #2.3) |
| 4532 | |
| 4533 | Eventualy after step #2.5, we return to the event loop, which |
| 4534 | notices there's an event on the |
| 4535 | REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the |
| 4536 | associated callback --- the function below. At this point, we're |
| 4537 | always safe to start a vStopped sequence. : |
| 4538 | |
| 4539 | 2.6) --> vStopped |
| 4540 | 2.7) <-- T05 thread:2 |
| 4541 | 2.8) --> vStopped |
| 4542 | 2.9) --> OK |
| 4543 | */ |
| 4544 | |
| 4545 | static void |
| 4546 | remote_get_pending_stop_replies (void) |
| 4547 | { |
| 4548 | struct remote_state *rs = get_remote_state (); |
| 4549 | int ret; |
| 4550 | |
| 4551 | if (pending_stop_reply) |
| 4552 | { |
| 4553 | /* acknowledge */ |
| 4554 | putpkt ("vStopped"); |
| 4555 | |
| 4556 | /* Now we can rely on it. */ |
| 4557 | push_stop_reply (pending_stop_reply); |
| 4558 | pending_stop_reply = NULL; |
| 4559 | |
| 4560 | while (1) |
| 4561 | { |
| 4562 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 4563 | if (strcmp (rs->buf, "OK") == 0) |
| 4564 | break; |
| 4565 | else |
| 4566 | { |
| 4567 | struct cleanup *old_chain; |
| 4568 | struct stop_reply *stop_reply = stop_reply_xmalloc (); |
| 4569 | |
| 4570 | old_chain = make_cleanup (do_stop_reply_xfree, stop_reply); |
| 4571 | remote_parse_stop_reply (rs->buf, stop_reply); |
| 4572 | |
| 4573 | /* acknowledge */ |
| 4574 | putpkt ("vStopped"); |
| 4575 | |
| 4576 | if (stop_reply->ws.kind != TARGET_WAITKIND_IGNORE) |
| 4577 | { |
| 4578 | /* Now we can rely on it. */ |
| 4579 | discard_cleanups (old_chain); |
| 4580 | push_stop_reply (stop_reply); |
| 4581 | } |
| 4582 | else |
| 4583 | /* We got an unknown stop reply. */ |
| 4584 | do_cleanups (old_chain); |
| 4585 | } |
| 4586 | } |
| 4587 | } |
| 4588 | } |
| 4589 | |
| 4590 | |
| 4591 | /* Called when it is decided that STOP_REPLY holds the info of the |
| 4592 | event that is to be returned to the core. This function always |
| 4593 | destroys STOP_REPLY. */ |
| 4594 | |
| 4595 | static ptid_t |
| 4596 | process_stop_reply (struct stop_reply *stop_reply, |
| 4597 | struct target_waitstatus *status) |
| 4598 | { |
| 4599 | ptid_t ptid; |
| 4600 | |
| 4601 | *status = stop_reply->ws; |
| 4602 | ptid = stop_reply->ptid; |
| 4603 | |
| 4604 | /* If no thread/process was reported by the stub, assume the current |
| 4605 | inferior. */ |
| 4606 | if (ptid_equal (ptid, null_ptid)) |
| 4607 | ptid = inferior_ptid; |
| 4608 | |
| 4609 | if (status->kind != TARGET_WAITKIND_EXITED |
| 4610 | && status->kind != TARGET_WAITKIND_SIGNALLED) |
| 4611 | { |
| 4612 | /* Expedited registers. */ |
| 4613 | if (stop_reply->regcache) |
| 4614 | { |
| 4615 | cached_reg_t *reg; |
| 4616 | int ix; |
| 4617 | |
| 4618 | for (ix = 0; |
| 4619 | VEC_iterate(cached_reg_t, stop_reply->regcache, ix, reg); |
| 4620 | ix++) |
| 4621 | regcache_raw_supply (get_thread_regcache (ptid), |
| 4622 | reg->num, reg->data); |
| 4623 | VEC_free (cached_reg_t, stop_reply->regcache); |
| 4624 | } |
| 4625 | |
| 4626 | remote_stopped_by_watchpoint_p = stop_reply->stopped_by_watchpoint_p; |
| 4627 | remote_watch_data_address = stop_reply->watch_data_address; |
| 4628 | |
| 4629 | remote_notice_new_inferior (ptid, 0); |
| 4630 | } |
| 4631 | |
| 4632 | stop_reply_xfree (stop_reply); |
| 4633 | return ptid; |
| 4634 | } |
| 4635 | |
| 4636 | /* The non-stop mode version of target_wait. */ |
| 4637 | |
| 4638 | static ptid_t |
| 4639 | remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options) |
| 4640 | { |
| 4641 | struct remote_state *rs = get_remote_state (); |
| 4642 | struct remote_arch_state *rsa = get_remote_arch_state (); |
| 4643 | ptid_t event_ptid = null_ptid; |
| 4644 | struct stop_reply *stop_reply; |
| 4645 | int ret; |
| 4646 | |
| 4647 | /* If in non-stop mode, get out of getpkt even if a |
| 4648 | notification is received. */ |
| 4649 | |
| 4650 | ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size, |
| 4651 | 0 /* forever */); |
| 4652 | while (1) |
| 4653 | { |
| 4654 | if (ret != -1) |
| 4655 | switch (rs->buf[0]) |
| 4656 | { |
| 4657 | case 'E': /* Error of some sort. */ |
| 4658 | /* We're out of sync with the target now. Did it continue |
| 4659 | or not? We can't tell which thread it was in non-stop, |
| 4660 | so just ignore this. */ |
| 4661 | warning (_("Remote failure reply: %s"), rs->buf); |
| 4662 | break; |
| 4663 | case 'O': /* Console output. */ |
| 4664 | remote_console_output (rs->buf + 1); |
| 4665 | break; |
| 4666 | default: |
| 4667 | warning (_("Invalid remote reply: %s"), rs->buf); |
| 4668 | break; |
| 4669 | } |
| 4670 | |
| 4671 | /* Acknowledge a pending stop reply that may have arrived in the |
| 4672 | mean time. */ |
| 4673 | if (pending_stop_reply != NULL) |
| 4674 | remote_get_pending_stop_replies (); |
| 4675 | |
| 4676 | /* If indeed we noticed a stop reply, we're done. */ |
| 4677 | stop_reply = queued_stop_reply (ptid); |
| 4678 | if (stop_reply != NULL) |
| 4679 | return process_stop_reply (stop_reply, status); |
| 4680 | |
| 4681 | /* Still no event. If we're just polling for an event, then |
| 4682 | return to the event loop. */ |
| 4683 | if (options & TARGET_WNOHANG) |
| 4684 | { |
| 4685 | status->kind = TARGET_WAITKIND_IGNORE; |
| 4686 | return minus_one_ptid; |
| 4687 | } |
| 4688 | |
| 4689 | /* Otherwise do a blocking wait. */ |
| 4690 | ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size, |
| 4691 | 1 /* forever */); |
| 4692 | } |
| 4693 | } |
| 4694 | |
| 4695 | /* Wait until the remote machine stops, then return, storing status in |
| 4696 | STATUS just as `wait' would. */ |
| 4697 | |
| 4698 | static ptid_t |
| 4699 | remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options) |
| 4700 | { |
| 4701 | struct remote_state *rs = get_remote_state (); |
| 4702 | struct remote_arch_state *rsa = get_remote_arch_state (); |
| 4703 | ptid_t event_ptid = null_ptid; |
| 4704 | ULONGEST addr; |
| 4705 | int solibs_changed = 0; |
| 4706 | char *buf, *p; |
| 4707 | struct stop_reply *stop_reply; |
| 4708 | |
| 4709 | again: |
| 4710 | |
| 4711 | status->kind = TARGET_WAITKIND_IGNORE; |
| 4712 | status->value.integer = 0; |
| 4713 | |
| 4714 | stop_reply = queued_stop_reply (ptid); |
| 4715 | if (stop_reply != NULL) |
| 4716 | return process_stop_reply (stop_reply, status); |
| 4717 | |
| 4718 | if (rs->cached_wait_status) |
| 4719 | /* Use the cached wait status, but only once. */ |
| 4720 | rs->cached_wait_status = 0; |
| 4721 | else |
| 4722 | { |
| 4723 | int ret; |
| 4724 | |
| 4725 | if (!target_is_async_p ()) |
| 4726 | { |
| 4727 | ofunc = signal (SIGINT, remote_interrupt); |
| 4728 | /* If the user hit C-c before this packet, or between packets, |
| 4729 | pretend that it was hit right here. */ |
| 4730 | if (quit_flag) |
| 4731 | { |
| 4732 | quit_flag = 0; |
| 4733 | remote_interrupt (SIGINT); |
| 4734 | } |
| 4735 | } |
| 4736 | |
| 4737 | /* FIXME: cagney/1999-09-27: If we're in async mode we should |
| 4738 | _never_ wait for ever -> test on target_is_async_p(). |
| 4739 | However, before we do that we need to ensure that the caller |
| 4740 | knows how to take the target into/out of async mode. */ |
| 4741 | ret = getpkt_sane (&rs->buf, &rs->buf_size, wait_forever_enabled_p); |
| 4742 | if (!target_is_async_p ()) |
| 4743 | signal (SIGINT, ofunc); |
| 4744 | } |
| 4745 | |
| 4746 | buf = rs->buf; |
| 4747 | |
| 4748 | remote_stopped_by_watchpoint_p = 0; |
| 4749 | |
| 4750 | /* We got something. */ |
| 4751 | rs->waiting_for_stop_reply = 0; |
| 4752 | |
| 4753 | switch (buf[0]) |
| 4754 | { |
| 4755 | case 'E': /* Error of some sort. */ |
| 4756 | /* We're out of sync with the target now. Did it continue or |
| 4757 | not? Not is more likely, so report a stop. */ |
| 4758 | warning (_("Remote failure reply: %s"), buf); |
| 4759 | status->kind = TARGET_WAITKIND_STOPPED; |
| 4760 | status->value.sig = TARGET_SIGNAL_0; |
| 4761 | break; |
| 4762 | case 'F': /* File-I/O request. */ |
| 4763 | remote_fileio_request (buf); |
| 4764 | break; |
| 4765 | case 'T': case 'S': case 'X': case 'W': |
| 4766 | { |
| 4767 | struct stop_reply *stop_reply; |
| 4768 | struct cleanup *old_chain; |
| 4769 | |
| 4770 | stop_reply = stop_reply_xmalloc (); |
| 4771 | old_chain = make_cleanup (do_stop_reply_xfree, stop_reply); |
| 4772 | remote_parse_stop_reply (buf, stop_reply); |
| 4773 | discard_cleanups (old_chain); |
| 4774 | event_ptid = process_stop_reply (stop_reply, status); |
| 4775 | break; |
| 4776 | } |
| 4777 | case 'O': /* Console output. */ |
| 4778 | remote_console_output (buf + 1); |
| 4779 | |
| 4780 | /* The target didn't really stop; keep waiting. */ |
| 4781 | rs->waiting_for_stop_reply = 1; |
| 4782 | |
| 4783 | break; |
| 4784 | case '\0': |
| 4785 | if (last_sent_signal != TARGET_SIGNAL_0) |
| 4786 | { |
| 4787 | /* Zero length reply means that we tried 'S' or 'C' and the |
| 4788 | remote system doesn't support it. */ |
| 4789 | target_terminal_ours_for_output (); |
| 4790 | printf_filtered |
| 4791 | ("Can't send signals to this remote system. %s not sent.\n", |
| 4792 | target_signal_to_name (last_sent_signal)); |
| 4793 | last_sent_signal = TARGET_SIGNAL_0; |
| 4794 | target_terminal_inferior (); |
| 4795 | |
| 4796 | strcpy ((char *) buf, last_sent_step ? "s" : "c"); |
| 4797 | putpkt ((char *) buf); |
| 4798 | |
| 4799 | /* We just told the target to resume, so a stop reply is in |
| 4800 | order. */ |
| 4801 | rs->waiting_for_stop_reply = 1; |
| 4802 | break; |
| 4803 | } |
| 4804 | /* else fallthrough */ |
| 4805 | default: |
| 4806 | warning (_("Invalid remote reply: %s"), buf); |
| 4807 | /* Keep waiting. */ |
| 4808 | rs->waiting_for_stop_reply = 1; |
| 4809 | break; |
| 4810 | } |
| 4811 | |
| 4812 | if (status->kind == TARGET_WAITKIND_IGNORE) |
| 4813 | { |
| 4814 | /* Nothing interesting happened. If we're doing a non-blocking |
| 4815 | poll, we're done. Otherwise, go back to waiting. */ |
| 4816 | if (options & TARGET_WNOHANG) |
| 4817 | return minus_one_ptid; |
| 4818 | else |
| 4819 | goto again; |
| 4820 | } |
| 4821 | else if (status->kind != TARGET_WAITKIND_EXITED |
| 4822 | && status->kind != TARGET_WAITKIND_SIGNALLED) |
| 4823 | { |
| 4824 | if (!ptid_equal (event_ptid, null_ptid)) |
| 4825 | record_currthread (event_ptid); |
| 4826 | else |
| 4827 | event_ptid = inferior_ptid; |
| 4828 | } |
| 4829 | else |
| 4830 | /* A process exit. Invalidate our notion of current thread. */ |
| 4831 | record_currthread (minus_one_ptid); |
| 4832 | |
| 4833 | return event_ptid; |
| 4834 | } |
| 4835 | |
| 4836 | /* Wait until the remote machine stops, then return, storing status in |
| 4837 | STATUS just as `wait' would. */ |
| 4838 | |
| 4839 | static ptid_t |
| 4840 | remote_wait (struct target_ops *ops, |
| 4841 | ptid_t ptid, struct target_waitstatus *status, int options) |
| 4842 | { |
| 4843 | ptid_t event_ptid; |
| 4844 | |
| 4845 | if (non_stop) |
| 4846 | event_ptid = remote_wait_ns (ptid, status, options); |
| 4847 | else |
| 4848 | event_ptid = remote_wait_as (ptid, status, options); |
| 4849 | |
| 4850 | if (target_can_async_p ()) |
| 4851 | { |
| 4852 | /* If there are are events left in the queue tell the event loop |
| 4853 | to return here. */ |
| 4854 | if (stop_reply_queue) |
| 4855 | mark_async_event_handler (remote_async_inferior_event_token); |
| 4856 | } |
| 4857 | |
| 4858 | return event_ptid; |
| 4859 | } |
| 4860 | |
| 4861 | /* Fetch a single register using a 'p' packet. */ |
| 4862 | |
| 4863 | static int |
| 4864 | fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg) |
| 4865 | { |
| 4866 | struct remote_state *rs = get_remote_state (); |
| 4867 | char *buf, *p; |
| 4868 | char regp[MAX_REGISTER_SIZE]; |
| 4869 | int i; |
| 4870 | |
| 4871 | if (remote_protocol_packets[PACKET_p].support == PACKET_DISABLE) |
| 4872 | return 0; |
| 4873 | |
| 4874 | if (reg->pnum == -1) |
| 4875 | return 0; |
| 4876 | |
| 4877 | p = rs->buf; |
| 4878 | *p++ = 'p'; |
| 4879 | p += hexnumstr (p, reg->pnum); |
| 4880 | *p++ = '\0'; |
| 4881 | remote_send (&rs->buf, &rs->buf_size); |
| 4882 | |
| 4883 | buf = rs->buf; |
| 4884 | |
| 4885 | switch (packet_ok (buf, &remote_protocol_packets[PACKET_p])) |
| 4886 | { |
| 4887 | case PACKET_OK: |
| 4888 | break; |
| 4889 | case PACKET_UNKNOWN: |
| 4890 | return 0; |
| 4891 | case PACKET_ERROR: |
| 4892 | error (_("Could not fetch register \"%s\""), |
| 4893 | gdbarch_register_name (get_regcache_arch (regcache), reg->regnum)); |
| 4894 | } |
| 4895 | |
| 4896 | /* If this register is unfetchable, tell the regcache. */ |
| 4897 | if (buf[0] == 'x') |
| 4898 | { |
| 4899 | regcache_raw_supply (regcache, reg->regnum, NULL); |
| 4900 | return 1; |
| 4901 | } |
| 4902 | |
| 4903 | /* Otherwise, parse and supply the value. */ |
| 4904 | p = buf; |
| 4905 | i = 0; |
| 4906 | while (p[0] != 0) |
| 4907 | { |
| 4908 | if (p[1] == 0) |
| 4909 | error (_("fetch_register_using_p: early buf termination")); |
| 4910 | |
| 4911 | regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]); |
| 4912 | p += 2; |
| 4913 | } |
| 4914 | regcache_raw_supply (regcache, reg->regnum, regp); |
| 4915 | return 1; |
| 4916 | } |
| 4917 | |
| 4918 | /* Fetch the registers included in the target's 'g' packet. */ |
| 4919 | |
| 4920 | static int |
| 4921 | send_g_packet (void) |
| 4922 | { |
| 4923 | struct remote_state *rs = get_remote_state (); |
| 4924 | int i, buf_len; |
| 4925 | char *p; |
| 4926 | char *regs; |
| 4927 | |
| 4928 | sprintf (rs->buf, "g"); |
| 4929 | remote_send (&rs->buf, &rs->buf_size); |
| 4930 | |
| 4931 | /* We can get out of synch in various cases. If the first character |
| 4932 | in the buffer is not a hex character, assume that has happened |
| 4933 | and try to fetch another packet to read. */ |
| 4934 | while ((rs->buf[0] < '0' || rs->buf[0] > '9') |
| 4935 | && (rs->buf[0] < 'A' || rs->buf[0] > 'F') |
| 4936 | && (rs->buf[0] < 'a' || rs->buf[0] > 'f') |
| 4937 | && rs->buf[0] != 'x') /* New: unavailable register value. */ |
| 4938 | { |
| 4939 | if (remote_debug) |
| 4940 | fprintf_unfiltered (gdb_stdlog, |
| 4941 | "Bad register packet; fetching a new packet\n"); |
| 4942 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 4943 | } |
| 4944 | |
| 4945 | buf_len = strlen (rs->buf); |
| 4946 | |
| 4947 | /* Sanity check the received packet. */ |
| 4948 | if (buf_len % 2 != 0) |
| 4949 | error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf); |
| 4950 | |
| 4951 | return buf_len / 2; |
| 4952 | } |
| 4953 | |
| 4954 | static void |
| 4955 | process_g_packet (struct regcache *regcache) |
| 4956 | { |
| 4957 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 4958 | struct remote_state *rs = get_remote_state (); |
| 4959 | struct remote_arch_state *rsa = get_remote_arch_state (); |
| 4960 | int i, buf_len; |
| 4961 | char *p; |
| 4962 | char *regs; |
| 4963 | |
| 4964 | buf_len = strlen (rs->buf); |
| 4965 | |
| 4966 | /* Further sanity checks, with knowledge of the architecture. */ |
| 4967 | if (buf_len > 2 * rsa->sizeof_g_packet) |
| 4968 | error (_("Remote 'g' packet reply is too long: %s"), rs->buf); |
| 4969 | |
| 4970 | /* Save the size of the packet sent to us by the target. It is used |
| 4971 | as a heuristic when determining the max size of packets that the |
| 4972 | target can safely receive. */ |
| 4973 | if (rsa->actual_register_packet_size == 0) |
| 4974 | rsa->actual_register_packet_size = buf_len; |
| 4975 | |
| 4976 | /* If this is smaller than we guessed the 'g' packet would be, |
| 4977 | update our records. A 'g' reply that doesn't include a register's |
| 4978 | value implies either that the register is not available, or that |
| 4979 | the 'p' packet must be used. */ |
| 4980 | if (buf_len < 2 * rsa->sizeof_g_packet) |
| 4981 | { |
| 4982 | rsa->sizeof_g_packet = buf_len / 2; |
| 4983 | |
| 4984 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
| 4985 | { |
| 4986 | if (rsa->regs[i].pnum == -1) |
| 4987 | continue; |
| 4988 | |
| 4989 | if (rsa->regs[i].offset >= rsa->sizeof_g_packet) |
| 4990 | rsa->regs[i].in_g_packet = 0; |
| 4991 | else |
| 4992 | rsa->regs[i].in_g_packet = 1; |
| 4993 | } |
| 4994 | } |
| 4995 | |
| 4996 | regs = alloca (rsa->sizeof_g_packet); |
| 4997 | |
| 4998 | /* Unimplemented registers read as all bits zero. */ |
| 4999 | memset (regs, 0, rsa->sizeof_g_packet); |
| 5000 | |
| 5001 | /* Reply describes registers byte by byte, each byte encoded as two |
| 5002 | hex characters. Suck them all up, then supply them to the |
| 5003 | register cacheing/storage mechanism. */ |
| 5004 | |
| 5005 | p = rs->buf; |
| 5006 | for (i = 0; i < rsa->sizeof_g_packet; i++) |
| 5007 | { |
| 5008 | if (p[0] == 0 || p[1] == 0) |
| 5009 | /* This shouldn't happen - we adjusted sizeof_g_packet above. */ |
| 5010 | internal_error (__FILE__, __LINE__, |
| 5011 | "unexpected end of 'g' packet reply"); |
| 5012 | |
| 5013 | if (p[0] == 'x' && p[1] == 'x') |
| 5014 | regs[i] = 0; /* 'x' */ |
| 5015 | else |
| 5016 | regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); |
| 5017 | p += 2; |
| 5018 | } |
| 5019 | |
| 5020 | { |
| 5021 | int i; |
| 5022 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
| 5023 | { |
| 5024 | struct packet_reg *r = &rsa->regs[i]; |
| 5025 | if (r->in_g_packet) |
| 5026 | { |
| 5027 | if (r->offset * 2 >= strlen (rs->buf)) |
| 5028 | /* This shouldn't happen - we adjusted in_g_packet above. */ |
| 5029 | internal_error (__FILE__, __LINE__, |
| 5030 | "unexpected end of 'g' packet reply"); |
| 5031 | else if (rs->buf[r->offset * 2] == 'x') |
| 5032 | { |
| 5033 | gdb_assert (r->offset * 2 < strlen (rs->buf)); |
| 5034 | /* The register isn't available, mark it as such (at |
| 5035 | the same time setting the value to zero). */ |
| 5036 | regcache_raw_supply (regcache, r->regnum, NULL); |
| 5037 | } |
| 5038 | else |
| 5039 | regcache_raw_supply (regcache, r->regnum, |
| 5040 | regs + r->offset); |
| 5041 | } |
| 5042 | } |
| 5043 | } |
| 5044 | } |
| 5045 | |
| 5046 | static void |
| 5047 | fetch_registers_using_g (struct regcache *regcache) |
| 5048 | { |
| 5049 | send_g_packet (); |
| 5050 | process_g_packet (regcache); |
| 5051 | } |
| 5052 | |
| 5053 | static void |
| 5054 | remote_fetch_registers (struct target_ops *ops, |
| 5055 | struct regcache *regcache, int regnum) |
| 5056 | { |
| 5057 | struct remote_state *rs = get_remote_state (); |
| 5058 | struct remote_arch_state *rsa = get_remote_arch_state (); |
| 5059 | int i; |
| 5060 | |
| 5061 | set_general_thread (inferior_ptid); |
| 5062 | |
| 5063 | if (regnum >= 0) |
| 5064 | { |
| 5065 | struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum); |
| 5066 | gdb_assert (reg != NULL); |
| 5067 | |
| 5068 | /* If this register might be in the 'g' packet, try that first - |
| 5069 | we are likely to read more than one register. If this is the |
| 5070 | first 'g' packet, we might be overly optimistic about its |
| 5071 | contents, so fall back to 'p'. */ |
| 5072 | if (reg->in_g_packet) |
| 5073 | { |
| 5074 | fetch_registers_using_g (regcache); |
| 5075 | if (reg->in_g_packet) |
| 5076 | return; |
| 5077 | } |
| 5078 | |
| 5079 | if (fetch_register_using_p (regcache, reg)) |
| 5080 | return; |
| 5081 | |
| 5082 | /* This register is not available. */ |
| 5083 | regcache_raw_supply (regcache, reg->regnum, NULL); |
| 5084 | |
| 5085 | return; |
| 5086 | } |
| 5087 | |
| 5088 | fetch_registers_using_g (regcache); |
| 5089 | |
| 5090 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
| 5091 | if (!rsa->regs[i].in_g_packet) |
| 5092 | if (!fetch_register_using_p (regcache, &rsa->regs[i])) |
| 5093 | { |
| 5094 | /* This register is not available. */ |
| 5095 | regcache_raw_supply (regcache, i, NULL); |
| 5096 | } |
| 5097 | } |
| 5098 | |
| 5099 | /* Prepare to store registers. Since we may send them all (using a |
| 5100 | 'G' request), we have to read out the ones we don't want to change |
| 5101 | first. */ |
| 5102 | |
| 5103 | static void |
| 5104 | remote_prepare_to_store (struct regcache *regcache) |
| 5105 | { |
| 5106 | struct remote_arch_state *rsa = get_remote_arch_state (); |
| 5107 | int i; |
| 5108 | gdb_byte buf[MAX_REGISTER_SIZE]; |
| 5109 | |
| 5110 | /* Make sure the entire registers array is valid. */ |
| 5111 | switch (remote_protocol_packets[PACKET_P].support) |
| 5112 | { |
| 5113 | case PACKET_DISABLE: |
| 5114 | case PACKET_SUPPORT_UNKNOWN: |
| 5115 | /* Make sure all the necessary registers are cached. */ |
| 5116 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
| 5117 | if (rsa->regs[i].in_g_packet) |
| 5118 | regcache_raw_read (regcache, rsa->regs[i].regnum, buf); |
| 5119 | break; |
| 5120 | case PACKET_ENABLE: |
| 5121 | break; |
| 5122 | } |
| 5123 | } |
| 5124 | |
| 5125 | /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF |
| 5126 | packet was not recognized. */ |
| 5127 | |
| 5128 | static int |
| 5129 | store_register_using_P (const struct regcache *regcache, struct packet_reg *reg) |
| 5130 | { |
| 5131 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 5132 | struct remote_state *rs = get_remote_state (); |
| 5133 | struct remote_arch_state *rsa = get_remote_arch_state (); |
| 5134 | /* Try storing a single register. */ |
| 5135 | char *buf = rs->buf; |
| 5136 | gdb_byte regp[MAX_REGISTER_SIZE]; |
| 5137 | char *p; |
| 5138 | |
| 5139 | if (remote_protocol_packets[PACKET_P].support == PACKET_DISABLE) |
| 5140 | return 0; |
| 5141 | |
| 5142 | if (reg->pnum == -1) |
| 5143 | return 0; |
| 5144 | |
| 5145 | xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0)); |
| 5146 | p = buf + strlen (buf); |
| 5147 | regcache_raw_collect (regcache, reg->regnum, regp); |
| 5148 | bin2hex (regp, p, register_size (gdbarch, reg->regnum)); |
| 5149 | remote_send (&rs->buf, &rs->buf_size); |
| 5150 | |
| 5151 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P])) |
| 5152 | { |
| 5153 | case PACKET_OK: |
| 5154 | return 1; |
| 5155 | case PACKET_ERROR: |
| 5156 | error (_("Could not write register \"%s\""), |
| 5157 | gdbarch_register_name (gdbarch, reg->regnum)); |
| 5158 | case PACKET_UNKNOWN: |
| 5159 | return 0; |
| 5160 | default: |
| 5161 | internal_error (__FILE__, __LINE__, _("Bad result from packet_ok")); |
| 5162 | } |
| 5163 | } |
| 5164 | |
| 5165 | /* Store register REGNUM, or all registers if REGNUM == -1, from the |
| 5166 | contents of the register cache buffer. FIXME: ignores errors. */ |
| 5167 | |
| 5168 | static void |
| 5169 | store_registers_using_G (const struct regcache *regcache) |
| 5170 | { |
| 5171 | struct remote_state *rs = get_remote_state (); |
| 5172 | struct remote_arch_state *rsa = get_remote_arch_state (); |
| 5173 | gdb_byte *regs; |
| 5174 | char *p; |
| 5175 | |
| 5176 | /* Extract all the registers in the regcache copying them into a |
| 5177 | local buffer. */ |
| 5178 | { |
| 5179 | int i; |
| 5180 | regs = alloca (rsa->sizeof_g_packet); |
| 5181 | memset (regs, 0, rsa->sizeof_g_packet); |
| 5182 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
| 5183 | { |
| 5184 | struct packet_reg *r = &rsa->regs[i]; |
| 5185 | if (r->in_g_packet) |
| 5186 | regcache_raw_collect (regcache, r->regnum, regs + r->offset); |
| 5187 | } |
| 5188 | } |
| 5189 | |
| 5190 | /* Command describes registers byte by byte, |
| 5191 | each byte encoded as two hex characters. */ |
| 5192 | p = rs->buf; |
| 5193 | *p++ = 'G'; |
| 5194 | /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets |
| 5195 | updated. */ |
| 5196 | bin2hex (regs, p, rsa->sizeof_g_packet); |
| 5197 | remote_send (&rs->buf, &rs->buf_size); |
| 5198 | } |
| 5199 | |
| 5200 | /* Store register REGNUM, or all registers if REGNUM == -1, from the contents |
| 5201 | of the register cache buffer. FIXME: ignores errors. */ |
| 5202 | |
| 5203 | static void |
| 5204 | remote_store_registers (struct target_ops *ops, |
| 5205 | struct regcache *regcache, int regnum) |
| 5206 | { |
| 5207 | struct remote_state *rs = get_remote_state (); |
| 5208 | struct remote_arch_state *rsa = get_remote_arch_state (); |
| 5209 | int i; |
| 5210 | |
| 5211 | set_general_thread (inferior_ptid); |
| 5212 | |
| 5213 | if (regnum >= 0) |
| 5214 | { |
| 5215 | struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum); |
| 5216 | gdb_assert (reg != NULL); |
| 5217 | |
| 5218 | /* Always prefer to store registers using the 'P' packet if |
| 5219 | possible; we often change only a small number of registers. |
| 5220 | Sometimes we change a larger number; we'd need help from a |
| 5221 | higher layer to know to use 'G'. */ |
| 5222 | if (store_register_using_P (regcache, reg)) |
| 5223 | return; |
| 5224 | |
| 5225 | /* For now, don't complain if we have no way to write the |
| 5226 | register. GDB loses track of unavailable registers too |
| 5227 | easily. Some day, this may be an error. We don't have |
| 5228 | any way to read the register, either... */ |
| 5229 | if (!reg->in_g_packet) |
| 5230 | return; |
| 5231 | |
| 5232 | store_registers_using_G (regcache); |
| 5233 | return; |
| 5234 | } |
| 5235 | |
| 5236 | store_registers_using_G (regcache); |
| 5237 | |
| 5238 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
| 5239 | if (!rsa->regs[i].in_g_packet) |
| 5240 | if (!store_register_using_P (regcache, &rsa->regs[i])) |
| 5241 | /* See above for why we do not issue an error here. */ |
| 5242 | continue; |
| 5243 | } |
| 5244 | \f |
| 5245 | |
| 5246 | /* Return the number of hex digits in num. */ |
| 5247 | |
| 5248 | static int |
| 5249 | hexnumlen (ULONGEST num) |
| 5250 | { |
| 5251 | int i; |
| 5252 | |
| 5253 | for (i = 0; num != 0; i++) |
| 5254 | num >>= 4; |
| 5255 | |
| 5256 | return max (i, 1); |
| 5257 | } |
| 5258 | |
| 5259 | /* Set BUF to the minimum number of hex digits representing NUM. */ |
| 5260 | |
| 5261 | static int |
| 5262 | hexnumstr (char *buf, ULONGEST num) |
| 5263 | { |
| 5264 | int len = hexnumlen (num); |
| 5265 | return hexnumnstr (buf, num, len); |
| 5266 | } |
| 5267 | |
| 5268 | |
| 5269 | /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */ |
| 5270 | |
| 5271 | static int |
| 5272 | hexnumnstr (char *buf, ULONGEST num, int width) |
| 5273 | { |
| 5274 | int i; |
| 5275 | |
| 5276 | buf[width] = '\0'; |
| 5277 | |
| 5278 | for (i = width - 1; i >= 0; i--) |
| 5279 | { |
| 5280 | buf[i] = "0123456789abcdef"[(num & 0xf)]; |
| 5281 | num >>= 4; |
| 5282 | } |
| 5283 | |
| 5284 | return width; |
| 5285 | } |
| 5286 | |
| 5287 | /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */ |
| 5288 | |
| 5289 | static CORE_ADDR |
| 5290 | remote_address_masked (CORE_ADDR addr) |
| 5291 | { |
| 5292 | int address_size = remote_address_size; |
| 5293 | /* If "remoteaddresssize" was not set, default to target address size. */ |
| 5294 | if (!address_size) |
| 5295 | address_size = gdbarch_addr_bit (target_gdbarch); |
| 5296 | |
| 5297 | if (address_size > 0 |
| 5298 | && address_size < (sizeof (ULONGEST) * 8)) |
| 5299 | { |
| 5300 | /* Only create a mask when that mask can safely be constructed |
| 5301 | in a ULONGEST variable. */ |
| 5302 | ULONGEST mask = 1; |
| 5303 | mask = (mask << address_size) - 1; |
| 5304 | addr &= mask; |
| 5305 | } |
| 5306 | return addr; |
| 5307 | } |
| 5308 | |
| 5309 | /* Convert BUFFER, binary data at least LEN bytes long, into escaped |
| 5310 | binary data in OUT_BUF. Set *OUT_LEN to the length of the data |
| 5311 | encoded in OUT_BUF, and return the number of bytes in OUT_BUF |
| 5312 | (which may be more than *OUT_LEN due to escape characters). The |
| 5313 | total number of bytes in the output buffer will be at most |
| 5314 | OUT_MAXLEN. */ |
| 5315 | |
| 5316 | static int |
| 5317 | remote_escape_output (const gdb_byte *buffer, int len, |
| 5318 | gdb_byte *out_buf, int *out_len, |
| 5319 | int out_maxlen) |
| 5320 | { |
| 5321 | int input_index, output_index; |
| 5322 | |
| 5323 | output_index = 0; |
| 5324 | for (input_index = 0; input_index < len; input_index++) |
| 5325 | { |
| 5326 | gdb_byte b = buffer[input_index]; |
| 5327 | |
| 5328 | if (b == '$' || b == '#' || b == '}') |
| 5329 | { |
| 5330 | /* These must be escaped. */ |
| 5331 | if (output_index + 2 > out_maxlen) |
| 5332 | break; |
| 5333 | out_buf[output_index++] = '}'; |
| 5334 | out_buf[output_index++] = b ^ 0x20; |
| 5335 | } |
| 5336 | else |
| 5337 | { |
| 5338 | if (output_index + 1 > out_maxlen) |
| 5339 | break; |
| 5340 | out_buf[output_index++] = b; |
| 5341 | } |
| 5342 | } |
| 5343 | |
| 5344 | *out_len = input_index; |
| 5345 | return output_index; |
| 5346 | } |
| 5347 | |
| 5348 | /* Convert BUFFER, escaped data LEN bytes long, into binary data |
| 5349 | in OUT_BUF. Return the number of bytes written to OUT_BUF. |
| 5350 | Raise an error if the total number of bytes exceeds OUT_MAXLEN. |
| 5351 | |
| 5352 | This function reverses remote_escape_output. It allows more |
| 5353 | escaped characters than that function does, in particular because |
| 5354 | '*' must be escaped to avoid the run-length encoding processing |
| 5355 | in reading packets. */ |
| 5356 | |
| 5357 | static int |
| 5358 | remote_unescape_input (const gdb_byte *buffer, int len, |
| 5359 | gdb_byte *out_buf, int out_maxlen) |
| 5360 | { |
| 5361 | int input_index, output_index; |
| 5362 | int escaped; |
| 5363 | |
| 5364 | output_index = 0; |
| 5365 | escaped = 0; |
| 5366 | for (input_index = 0; input_index < len; input_index++) |
| 5367 | { |
| 5368 | gdb_byte b = buffer[input_index]; |
| 5369 | |
| 5370 | if (output_index + 1 > out_maxlen) |
| 5371 | { |
| 5372 | warning (_("Received too much data from remote target;" |
| 5373 | " ignoring overflow.")); |
| 5374 | return output_index; |
| 5375 | } |
| 5376 | |
| 5377 | if (escaped) |
| 5378 | { |
| 5379 | out_buf[output_index++] = b ^ 0x20; |
| 5380 | escaped = 0; |
| 5381 | } |
| 5382 | else if (b == '}') |
| 5383 | escaped = 1; |
| 5384 | else |
| 5385 | out_buf[output_index++] = b; |
| 5386 | } |
| 5387 | |
| 5388 | if (escaped) |
| 5389 | error (_("Unmatched escape character in target response.")); |
| 5390 | |
| 5391 | return output_index; |
| 5392 | } |
| 5393 | |
| 5394 | /* Determine whether the remote target supports binary downloading. |
| 5395 | This is accomplished by sending a no-op memory write of zero length |
| 5396 | to the target at the specified address. It does not suffice to send |
| 5397 | the whole packet, since many stubs strip the eighth bit and |
| 5398 | subsequently compute a wrong checksum, which causes real havoc with |
| 5399 | remote_write_bytes. |
| 5400 | |
| 5401 | NOTE: This can still lose if the serial line is not eight-bit |
| 5402 | clean. In cases like this, the user should clear "remote |
| 5403 | X-packet". */ |
| 5404 | |
| 5405 | static void |
| 5406 | check_binary_download (CORE_ADDR addr) |
| 5407 | { |
| 5408 | struct remote_state *rs = get_remote_state (); |
| 5409 | |
| 5410 | switch (remote_protocol_packets[PACKET_X].support) |
| 5411 | { |
| 5412 | case PACKET_DISABLE: |
| 5413 | break; |
| 5414 | case PACKET_ENABLE: |
| 5415 | break; |
| 5416 | case PACKET_SUPPORT_UNKNOWN: |
| 5417 | { |
| 5418 | char *p; |
| 5419 | |
| 5420 | p = rs->buf; |
| 5421 | *p++ = 'X'; |
| 5422 | p += hexnumstr (p, (ULONGEST) addr); |
| 5423 | *p++ = ','; |
| 5424 | p += hexnumstr (p, (ULONGEST) 0); |
| 5425 | *p++ = ':'; |
| 5426 | *p = '\0'; |
| 5427 | |
| 5428 | putpkt_binary (rs->buf, (int) (p - rs->buf)); |
| 5429 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 5430 | |
| 5431 | if (rs->buf[0] == '\0') |
| 5432 | { |
| 5433 | if (remote_debug) |
| 5434 | fprintf_unfiltered (gdb_stdlog, |
| 5435 | "binary downloading NOT suppported by target\n"); |
| 5436 | remote_protocol_packets[PACKET_X].support = PACKET_DISABLE; |
| 5437 | } |
| 5438 | else |
| 5439 | { |
| 5440 | if (remote_debug) |
| 5441 | fprintf_unfiltered (gdb_stdlog, |
| 5442 | "binary downloading suppported by target\n"); |
| 5443 | remote_protocol_packets[PACKET_X].support = PACKET_ENABLE; |
| 5444 | } |
| 5445 | break; |
| 5446 | } |
| 5447 | } |
| 5448 | } |
| 5449 | |
| 5450 | /* Write memory data directly to the remote machine. |
| 5451 | This does not inform the data cache; the data cache uses this. |
| 5452 | HEADER is the starting part of the packet. |
| 5453 | MEMADDR is the address in the remote memory space. |
| 5454 | MYADDR is the address of the buffer in our space. |
| 5455 | LEN is the number of bytes. |
| 5456 | PACKET_FORMAT should be either 'X' or 'M', and indicates if we |
| 5457 | should send data as binary ('X'), or hex-encoded ('M'). |
| 5458 | |
| 5459 | The function creates packet of the form |
| 5460 | <HEADER><ADDRESS>,<LENGTH>:<DATA> |
| 5461 | |
| 5462 | where encoding of <DATA> is termined by PACKET_FORMAT. |
| 5463 | |
| 5464 | If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma |
| 5465 | are omitted. |
| 5466 | |
| 5467 | Returns the number of bytes transferred, or 0 (setting errno) for |
| 5468 | error. Only transfer a single packet. */ |
| 5469 | |
| 5470 | static int |
| 5471 | remote_write_bytes_aux (const char *header, CORE_ADDR memaddr, |
| 5472 | const gdb_byte *myaddr, int len, |
| 5473 | char packet_format, int use_length) |
| 5474 | { |
| 5475 | struct remote_state *rs = get_remote_state (); |
| 5476 | char *p; |
| 5477 | char *plen = NULL; |
| 5478 | int plenlen = 0; |
| 5479 | int todo; |
| 5480 | int nr_bytes; |
| 5481 | int payload_size; |
| 5482 | int payload_length; |
| 5483 | int header_length; |
| 5484 | |
| 5485 | if (packet_format != 'X' && packet_format != 'M') |
| 5486 | internal_error (__FILE__, __LINE__, |
| 5487 | "remote_write_bytes_aux: bad packet format"); |
| 5488 | |
| 5489 | if (len <= 0) |
| 5490 | return 0; |
| 5491 | |
| 5492 | payload_size = get_memory_write_packet_size (); |
| 5493 | |
| 5494 | /* The packet buffer will be large enough for the payload; |
| 5495 | get_memory_packet_size ensures this. */ |
| 5496 | rs->buf[0] = '\0'; |
| 5497 | |
| 5498 | /* Compute the size of the actual payload by subtracting out the |
| 5499 | packet header and footer overhead: "$M<memaddr>,<len>:...#nn". |
| 5500 | */ |
| 5501 | payload_size -= strlen ("$,:#NN"); |
| 5502 | if (!use_length) |
| 5503 | /* The comma won't be used. */ |
| 5504 | payload_size += 1; |
| 5505 | header_length = strlen (header); |
| 5506 | payload_size -= header_length; |
| 5507 | payload_size -= hexnumlen (memaddr); |
| 5508 | |
| 5509 | /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */ |
| 5510 | |
| 5511 | strcat (rs->buf, header); |
| 5512 | p = rs->buf + strlen (header); |
| 5513 | |
| 5514 | /* Compute a best guess of the number of bytes actually transfered. */ |
| 5515 | if (packet_format == 'X') |
| 5516 | { |
| 5517 | /* Best guess at number of bytes that will fit. */ |
| 5518 | todo = min (len, payload_size); |
| 5519 | if (use_length) |
| 5520 | payload_size -= hexnumlen (todo); |
| 5521 | todo = min (todo, payload_size); |
| 5522 | } |
| 5523 | else |
| 5524 | { |
| 5525 | /* Num bytes that will fit. */ |
| 5526 | todo = min (len, payload_size / 2); |
| 5527 | if (use_length) |
| 5528 | payload_size -= hexnumlen (todo); |
| 5529 | todo = min (todo, payload_size / 2); |
| 5530 | } |
| 5531 | |
| 5532 | if (todo <= 0) |
| 5533 | internal_error (__FILE__, __LINE__, |
| 5534 | _("minumum packet size too small to write data")); |
| 5535 | |
| 5536 | /* If we already need another packet, then try to align the end |
| 5537 | of this packet to a useful boundary. */ |
| 5538 | if (todo > 2 * REMOTE_ALIGN_WRITES && todo < len) |
| 5539 | todo = ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr; |
| 5540 | |
| 5541 | /* Append "<memaddr>". */ |
| 5542 | memaddr = remote_address_masked (memaddr); |
| 5543 | p += hexnumstr (p, (ULONGEST) memaddr); |
| 5544 | |
| 5545 | if (use_length) |
| 5546 | { |
| 5547 | /* Append ",". */ |
| 5548 | *p++ = ','; |
| 5549 | |
| 5550 | /* Append <len>. Retain the location/size of <len>. It may need to |
| 5551 | be adjusted once the packet body has been created. */ |
| 5552 | plen = p; |
| 5553 | plenlen = hexnumstr (p, (ULONGEST) todo); |
| 5554 | p += plenlen; |
| 5555 | } |
| 5556 | |
| 5557 | /* Append ":". */ |
| 5558 | *p++ = ':'; |
| 5559 | *p = '\0'; |
| 5560 | |
| 5561 | /* Append the packet body. */ |
| 5562 | if (packet_format == 'X') |
| 5563 | { |
| 5564 | /* Binary mode. Send target system values byte by byte, in |
| 5565 | increasing byte addresses. Only escape certain critical |
| 5566 | characters. */ |
| 5567 | payload_length = remote_escape_output (myaddr, todo, p, &nr_bytes, |
| 5568 | payload_size); |
| 5569 | |
| 5570 | /* If not all TODO bytes fit, then we'll need another packet. Make |
| 5571 | a second try to keep the end of the packet aligned. Don't do |
| 5572 | this if the packet is tiny. */ |
| 5573 | if (nr_bytes < todo && nr_bytes > 2 * REMOTE_ALIGN_WRITES) |
| 5574 | { |
| 5575 | int new_nr_bytes; |
| 5576 | |
| 5577 | new_nr_bytes = (((memaddr + nr_bytes) & ~(REMOTE_ALIGN_WRITES - 1)) |
| 5578 | - memaddr); |
| 5579 | if (new_nr_bytes != nr_bytes) |
| 5580 | payload_length = remote_escape_output (myaddr, new_nr_bytes, |
| 5581 | p, &nr_bytes, |
| 5582 | payload_size); |
| 5583 | } |
| 5584 | |
| 5585 | p += payload_length; |
| 5586 | if (use_length && nr_bytes < todo) |
| 5587 | { |
| 5588 | /* Escape chars have filled up the buffer prematurely, |
| 5589 | and we have actually sent fewer bytes than planned. |
| 5590 | Fix-up the length field of the packet. Use the same |
| 5591 | number of characters as before. */ |
| 5592 | plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen); |
| 5593 | *plen = ':'; /* overwrite \0 from hexnumnstr() */ |
| 5594 | } |
| 5595 | } |
| 5596 | else |
| 5597 | { |
| 5598 | /* Normal mode: Send target system values byte by byte, in |
| 5599 | increasing byte addresses. Each byte is encoded as a two hex |
| 5600 | value. */ |
| 5601 | nr_bytes = bin2hex (myaddr, p, todo); |
| 5602 | p += 2 * nr_bytes; |
| 5603 | } |
| 5604 | |
| 5605 | putpkt_binary (rs->buf, (int) (p - rs->buf)); |
| 5606 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 5607 | |
| 5608 | if (rs->buf[0] == 'E') |
| 5609 | { |
| 5610 | /* There is no correspondance between what the remote protocol |
| 5611 | uses for errors and errno codes. We would like a cleaner way |
| 5612 | of representing errors (big enough to include errno codes, |
| 5613 | bfd_error codes, and others). But for now just return EIO. */ |
| 5614 | errno = EIO; |
| 5615 | return 0; |
| 5616 | } |
| 5617 | |
| 5618 | /* Return NR_BYTES, not TODO, in case escape chars caused us to send |
| 5619 | fewer bytes than we'd planned. */ |
| 5620 | return nr_bytes; |
| 5621 | } |
| 5622 | |
| 5623 | /* Write memory data directly to the remote machine. |
| 5624 | This does not inform the data cache; the data cache uses this. |
| 5625 | MEMADDR is the address in the remote memory space. |
| 5626 | MYADDR is the address of the buffer in our space. |
| 5627 | LEN is the number of bytes. |
| 5628 | |
| 5629 | Returns number of bytes transferred, or 0 (setting errno) for |
| 5630 | error. Only transfer a single packet. */ |
| 5631 | |
| 5632 | int |
| 5633 | remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, int len) |
| 5634 | { |
| 5635 | char *packet_format = 0; |
| 5636 | |
| 5637 | /* Check whether the target supports binary download. */ |
| 5638 | check_binary_download (memaddr); |
| 5639 | |
| 5640 | switch (remote_protocol_packets[PACKET_X].support) |
| 5641 | { |
| 5642 | case PACKET_ENABLE: |
| 5643 | packet_format = "X"; |
| 5644 | break; |
| 5645 | case PACKET_DISABLE: |
| 5646 | packet_format = "M"; |
| 5647 | break; |
| 5648 | case PACKET_SUPPORT_UNKNOWN: |
| 5649 | internal_error (__FILE__, __LINE__, |
| 5650 | _("remote_write_bytes: bad internal state")); |
| 5651 | default: |
| 5652 | internal_error (__FILE__, __LINE__, _("bad switch")); |
| 5653 | } |
| 5654 | |
| 5655 | return remote_write_bytes_aux (packet_format, |
| 5656 | memaddr, myaddr, len, packet_format[0], 1); |
| 5657 | } |
| 5658 | |
| 5659 | /* Read memory data directly from the remote machine. |
| 5660 | This does not use the data cache; the data cache uses this. |
| 5661 | MEMADDR is the address in the remote memory space. |
| 5662 | MYADDR is the address of the buffer in our space. |
| 5663 | LEN is the number of bytes. |
| 5664 | |
| 5665 | Returns number of bytes transferred, or 0 for error. */ |
| 5666 | |
| 5667 | /* NOTE: cagney/1999-10-18: This function (and its siblings in other |
| 5668 | remote targets) shouldn't attempt to read the entire buffer. |
| 5669 | Instead it should read a single packet worth of data and then |
| 5670 | return the byte size of that packet to the caller. The caller (its |
| 5671 | caller and its callers caller ;-) already contains code for |
| 5672 | handling partial reads. */ |
| 5673 | |
| 5674 | int |
| 5675 | remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len) |
| 5676 | { |
| 5677 | struct remote_state *rs = get_remote_state (); |
| 5678 | int max_buf_size; /* Max size of packet output buffer. */ |
| 5679 | int origlen; |
| 5680 | |
| 5681 | if (len <= 0) |
| 5682 | return 0; |
| 5683 | |
| 5684 | max_buf_size = get_memory_read_packet_size (); |
| 5685 | /* The packet buffer will be large enough for the payload; |
| 5686 | get_memory_packet_size ensures this. */ |
| 5687 | |
| 5688 | origlen = len; |
| 5689 | while (len > 0) |
| 5690 | { |
| 5691 | char *p; |
| 5692 | int todo; |
| 5693 | int i; |
| 5694 | |
| 5695 | todo = min (len, max_buf_size / 2); /* num bytes that will fit */ |
| 5696 | |
| 5697 | /* construct "m"<memaddr>","<len>" */ |
| 5698 | /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */ |
| 5699 | memaddr = remote_address_masked (memaddr); |
| 5700 | p = rs->buf; |
| 5701 | *p++ = 'm'; |
| 5702 | p += hexnumstr (p, (ULONGEST) memaddr); |
| 5703 | *p++ = ','; |
| 5704 | p += hexnumstr (p, (ULONGEST) todo); |
| 5705 | *p = '\0'; |
| 5706 | |
| 5707 | putpkt (rs->buf); |
| 5708 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 5709 | |
| 5710 | if (rs->buf[0] == 'E' |
| 5711 | && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2]) |
| 5712 | && rs->buf[3] == '\0') |
| 5713 | { |
| 5714 | /* There is no correspondance between what the remote |
| 5715 | protocol uses for errors and errno codes. We would like |
| 5716 | a cleaner way of representing errors (big enough to |
| 5717 | include errno codes, bfd_error codes, and others). But |
| 5718 | for now just return EIO. */ |
| 5719 | errno = EIO; |
| 5720 | return 0; |
| 5721 | } |
| 5722 | |
| 5723 | /* Reply describes memory byte by byte, |
| 5724 | each byte encoded as two hex characters. */ |
| 5725 | |
| 5726 | p = rs->buf; |
| 5727 | if ((i = hex2bin (p, myaddr, todo)) < todo) |
| 5728 | { |
| 5729 | /* Reply is short. This means that we were able to read |
| 5730 | only part of what we wanted to. */ |
| 5731 | return i + (origlen - len); |
| 5732 | } |
| 5733 | myaddr += todo; |
| 5734 | memaddr += todo; |
| 5735 | len -= todo; |
| 5736 | } |
| 5737 | return origlen; |
| 5738 | } |
| 5739 | \f |
| 5740 | |
| 5741 | /* Remote notification handler. */ |
| 5742 | |
| 5743 | static void |
| 5744 | handle_notification (char *buf, size_t length) |
| 5745 | { |
| 5746 | if (strncmp (buf, "Stop:", 5) == 0) |
| 5747 | { |
| 5748 | if (pending_stop_reply) |
| 5749 | /* We've already parsed the in-flight stop-reply, but the stub |
| 5750 | for some reason thought we didn't, possibly due to timeout |
| 5751 | on its side. Just ignore it. */ |
| 5752 | ; |
| 5753 | else |
| 5754 | { |
| 5755 | struct cleanup *old_chain; |
| 5756 | struct stop_reply *reply = stop_reply_xmalloc (); |
| 5757 | old_chain = make_cleanup (do_stop_reply_xfree, reply); |
| 5758 | |
| 5759 | remote_parse_stop_reply (buf + 5, reply); |
| 5760 | |
| 5761 | discard_cleanups (old_chain); |
| 5762 | |
| 5763 | /* Be careful to only set it after parsing, since an error |
| 5764 | may be thrown then. */ |
| 5765 | pending_stop_reply = reply; |
| 5766 | |
| 5767 | /* Notify the event loop there's a stop reply to acknowledge |
| 5768 | and that there may be more events to fetch. */ |
| 5769 | mark_async_event_handler (remote_async_get_pending_events_token); |
| 5770 | } |
| 5771 | } |
| 5772 | else |
| 5773 | /* We ignore notifications we don't recognize, for compatibility |
| 5774 | with newer stubs. */ |
| 5775 | ; |
| 5776 | } |
| 5777 | |
| 5778 | \f |
| 5779 | /* Read or write LEN bytes from inferior memory at MEMADDR, |
| 5780 | transferring to or from debugger address BUFFER. Write to inferior |
| 5781 | if SHOULD_WRITE is nonzero. Returns length of data written or |
| 5782 | read; 0 for error. TARGET is unused. */ |
| 5783 | |
| 5784 | static int |
| 5785 | remote_xfer_memory (CORE_ADDR mem_addr, gdb_byte *buffer, int mem_len, |
| 5786 | int should_write, struct mem_attrib *attrib, |
| 5787 | struct target_ops *target) |
| 5788 | { |
| 5789 | int res; |
| 5790 | |
| 5791 | set_general_thread (inferior_ptid); |
| 5792 | |
| 5793 | if (should_write) |
| 5794 | res = remote_write_bytes (mem_addr, buffer, mem_len); |
| 5795 | else |
| 5796 | res = remote_read_bytes (mem_addr, buffer, mem_len); |
| 5797 | |
| 5798 | return res; |
| 5799 | } |
| 5800 | |
| 5801 | /* Sends a packet with content determined by the printf format string |
| 5802 | FORMAT and the remaining arguments, then gets the reply. Returns |
| 5803 | whether the packet was a success, a failure, or unknown. */ |
| 5804 | |
| 5805 | static enum packet_result |
| 5806 | remote_send_printf (const char *format, ...) |
| 5807 | { |
| 5808 | struct remote_state *rs = get_remote_state (); |
| 5809 | int max_size = get_remote_packet_size (); |
| 5810 | |
| 5811 | va_list ap; |
| 5812 | va_start (ap, format); |
| 5813 | |
| 5814 | rs->buf[0] = '\0'; |
| 5815 | if (vsnprintf (rs->buf, max_size, format, ap) >= max_size) |
| 5816 | internal_error (__FILE__, __LINE__, "Too long remote packet."); |
| 5817 | |
| 5818 | if (putpkt (rs->buf) < 0) |
| 5819 | error (_("Communication problem with target.")); |
| 5820 | |
| 5821 | rs->buf[0] = '\0'; |
| 5822 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 5823 | |
| 5824 | return packet_check_result (rs->buf); |
| 5825 | } |
| 5826 | |
| 5827 | static void |
| 5828 | restore_remote_timeout (void *p) |
| 5829 | { |
| 5830 | int value = *(int *)p; |
| 5831 | remote_timeout = value; |
| 5832 | } |
| 5833 | |
| 5834 | /* Flash writing can take quite some time. We'll set |
| 5835 | effectively infinite timeout for flash operations. |
| 5836 | In future, we'll need to decide on a better approach. */ |
| 5837 | static const int remote_flash_timeout = 1000; |
| 5838 | |
| 5839 | static void |
| 5840 | remote_flash_erase (struct target_ops *ops, |
| 5841 | ULONGEST address, LONGEST length) |
| 5842 | { |
| 5843 | int saved_remote_timeout = remote_timeout; |
| 5844 | enum packet_result ret; |
| 5845 | |
| 5846 | struct cleanup *back_to = make_cleanup (restore_remote_timeout, |
| 5847 | &saved_remote_timeout); |
| 5848 | remote_timeout = remote_flash_timeout; |
| 5849 | |
| 5850 | ret = remote_send_printf ("vFlashErase:%s,%s", |
| 5851 | paddr (address), |
| 5852 | phex (length, 4)); |
| 5853 | switch (ret) |
| 5854 | { |
| 5855 | case PACKET_UNKNOWN: |
| 5856 | error (_("Remote target does not support flash erase")); |
| 5857 | case PACKET_ERROR: |
| 5858 | error (_("Error erasing flash with vFlashErase packet")); |
| 5859 | default: |
| 5860 | break; |
| 5861 | } |
| 5862 | |
| 5863 | do_cleanups (back_to); |
| 5864 | } |
| 5865 | |
| 5866 | static LONGEST |
| 5867 | remote_flash_write (struct target_ops *ops, |
| 5868 | ULONGEST address, LONGEST length, |
| 5869 | const gdb_byte *data) |
| 5870 | { |
| 5871 | int saved_remote_timeout = remote_timeout; |
| 5872 | int ret; |
| 5873 | struct cleanup *back_to = make_cleanup (restore_remote_timeout, |
| 5874 | &saved_remote_timeout); |
| 5875 | |
| 5876 | remote_timeout = remote_flash_timeout; |
| 5877 | ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 'X', 0); |
| 5878 | do_cleanups (back_to); |
| 5879 | |
| 5880 | return ret; |
| 5881 | } |
| 5882 | |
| 5883 | static void |
| 5884 | remote_flash_done (struct target_ops *ops) |
| 5885 | { |
| 5886 | int saved_remote_timeout = remote_timeout; |
| 5887 | int ret; |
| 5888 | struct cleanup *back_to = make_cleanup (restore_remote_timeout, |
| 5889 | &saved_remote_timeout); |
| 5890 | |
| 5891 | remote_timeout = remote_flash_timeout; |
| 5892 | ret = remote_send_printf ("vFlashDone"); |
| 5893 | do_cleanups (back_to); |
| 5894 | |
| 5895 | switch (ret) |
| 5896 | { |
| 5897 | case PACKET_UNKNOWN: |
| 5898 | error (_("Remote target does not support vFlashDone")); |
| 5899 | case PACKET_ERROR: |
| 5900 | error (_("Error finishing flash operation")); |
| 5901 | default: |
| 5902 | break; |
| 5903 | } |
| 5904 | } |
| 5905 | |
| 5906 | static void |
| 5907 | remote_files_info (struct target_ops *ignore) |
| 5908 | { |
| 5909 | puts_filtered ("Debugging a target over a serial line.\n"); |
| 5910 | } |
| 5911 | \f |
| 5912 | /* Stuff for dealing with the packets which are part of this protocol. |
| 5913 | See comment at top of file for details. */ |
| 5914 | |
| 5915 | /* Read a single character from the remote end. */ |
| 5916 | |
| 5917 | static int |
| 5918 | readchar (int timeout) |
| 5919 | { |
| 5920 | int ch; |
| 5921 | |
| 5922 | ch = serial_readchar (remote_desc, timeout); |
| 5923 | |
| 5924 | if (ch >= 0) |
| 5925 | return ch; |
| 5926 | |
| 5927 | switch ((enum serial_rc) ch) |
| 5928 | { |
| 5929 | case SERIAL_EOF: |
| 5930 | pop_target (); |
| 5931 | error (_("Remote connection closed")); |
| 5932 | /* no return */ |
| 5933 | case SERIAL_ERROR: |
| 5934 | perror_with_name (_("Remote communication error")); |
| 5935 | /* no return */ |
| 5936 | case SERIAL_TIMEOUT: |
| 5937 | break; |
| 5938 | } |
| 5939 | return ch; |
| 5940 | } |
| 5941 | |
| 5942 | /* Send the command in *BUF to the remote machine, and read the reply |
| 5943 | into *BUF. Report an error if we get an error reply. Resize |
| 5944 | *BUF using xrealloc if necessary to hold the result, and update |
| 5945 | *SIZEOF_BUF. */ |
| 5946 | |
| 5947 | static void |
| 5948 | remote_send (char **buf, |
| 5949 | long *sizeof_buf) |
| 5950 | { |
| 5951 | putpkt (*buf); |
| 5952 | getpkt (buf, sizeof_buf, 0); |
| 5953 | |
| 5954 | if ((*buf)[0] == 'E') |
| 5955 | error (_("Remote failure reply: %s"), *buf); |
| 5956 | } |
| 5957 | |
| 5958 | /* Return a pointer to an xmalloc'ed string representing an escaped |
| 5959 | version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t, |
| 5960 | etc. The caller is responsible for releasing the returned |
| 5961 | memory. */ |
| 5962 | |
| 5963 | static char * |
| 5964 | escape_buffer (const char *buf, int n) |
| 5965 | { |
| 5966 | struct cleanup *old_chain; |
| 5967 | struct ui_file *stb; |
| 5968 | char *str; |
| 5969 | long length; |
| 5970 | |
| 5971 | stb = mem_fileopen (); |
| 5972 | old_chain = make_cleanup_ui_file_delete (stb); |
| 5973 | |
| 5974 | fputstrn_unfiltered (buf, n, 0, stb); |
| 5975 | str = ui_file_xstrdup (stb, &length); |
| 5976 | do_cleanups (old_chain); |
| 5977 | return str; |
| 5978 | } |
| 5979 | |
| 5980 | /* Display a null-terminated packet on stdout, for debugging, using C |
| 5981 | string notation. */ |
| 5982 | |
| 5983 | static void |
| 5984 | print_packet (char *buf) |
| 5985 | { |
| 5986 | puts_filtered ("\""); |
| 5987 | fputstr_filtered (buf, '"', gdb_stdout); |
| 5988 | puts_filtered ("\""); |
| 5989 | } |
| 5990 | |
| 5991 | int |
| 5992 | putpkt (char *buf) |
| 5993 | { |
| 5994 | return putpkt_binary (buf, strlen (buf)); |
| 5995 | } |
| 5996 | |
| 5997 | /* Send a packet to the remote machine, with error checking. The data |
| 5998 | of the packet is in BUF. The string in BUF can be at most |
| 5999 | get_remote_packet_size () - 5 to account for the $, # and checksum, |
| 6000 | and for a possible /0 if we are debugging (remote_debug) and want |
| 6001 | to print the sent packet as a string. */ |
| 6002 | |
| 6003 | static int |
| 6004 | putpkt_binary (char *buf, int cnt) |
| 6005 | { |
| 6006 | struct remote_state *rs = get_remote_state (); |
| 6007 | int i; |
| 6008 | unsigned char csum = 0; |
| 6009 | char *buf2 = alloca (cnt + 6); |
| 6010 | |
| 6011 | int ch; |
| 6012 | int tcount = 0; |
| 6013 | char *p; |
| 6014 | |
| 6015 | /* Catch cases like trying to read memory or listing threads while |
| 6016 | we're waiting for a stop reply. The remote server wouldn't be |
| 6017 | ready to handle this request, so we'd hang and timeout. We don't |
| 6018 | have to worry about this in synchronous mode, because in that |
| 6019 | case it's not possible to issue a command while the target is |
| 6020 | running. This is not a problem in non-stop mode, because in that |
| 6021 | case, the stub is always ready to process serial input. */ |
| 6022 | if (!non_stop && target_can_async_p () && rs->waiting_for_stop_reply) |
| 6023 | error (_("Cannot execute this command while the target is running.")); |
| 6024 | |
| 6025 | /* We're sending out a new packet. Make sure we don't look at a |
| 6026 | stale cached response. */ |
| 6027 | rs->cached_wait_status = 0; |
| 6028 | |
| 6029 | /* Copy the packet into buffer BUF2, encapsulating it |
| 6030 | and giving it a checksum. */ |
| 6031 | |
| 6032 | p = buf2; |
| 6033 | *p++ = '$'; |
| 6034 | |
| 6035 | for (i = 0; i < cnt; i++) |
| 6036 | { |
| 6037 | csum += buf[i]; |
| 6038 | *p++ = buf[i]; |
| 6039 | } |
| 6040 | *p++ = '#'; |
| 6041 | *p++ = tohex ((csum >> 4) & 0xf); |
| 6042 | *p++ = tohex (csum & 0xf); |
| 6043 | |
| 6044 | /* Send it over and over until we get a positive ack. */ |
| 6045 | |
| 6046 | while (1) |
| 6047 | { |
| 6048 | int started_error_output = 0; |
| 6049 | |
| 6050 | if (remote_debug) |
| 6051 | { |
| 6052 | struct cleanup *old_chain; |
| 6053 | char *str; |
| 6054 | |
| 6055 | *p = '\0'; |
| 6056 | str = escape_buffer (buf2, p - buf2); |
| 6057 | old_chain = make_cleanup (xfree, str); |
| 6058 | fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str); |
| 6059 | gdb_flush (gdb_stdlog); |
| 6060 | do_cleanups (old_chain); |
| 6061 | } |
| 6062 | if (serial_write (remote_desc, buf2, p - buf2)) |
| 6063 | perror_with_name (_("putpkt: write failed")); |
| 6064 | |
| 6065 | /* If this is a no acks version of the remote protocol, send the |
| 6066 | packet and move on. */ |
| 6067 | if (rs->noack_mode) |
| 6068 | break; |
| 6069 | |
| 6070 | /* Read until either a timeout occurs (-2) or '+' is read. |
| 6071 | Handle any notification that arrives in the mean time. */ |
| 6072 | while (1) |
| 6073 | { |
| 6074 | ch = readchar (remote_timeout); |
| 6075 | |
| 6076 | if (remote_debug) |
| 6077 | { |
| 6078 | switch (ch) |
| 6079 | { |
| 6080 | case '+': |
| 6081 | case '-': |
| 6082 | case SERIAL_TIMEOUT: |
| 6083 | case '$': |
| 6084 | case '%': |
| 6085 | if (started_error_output) |
| 6086 | { |
| 6087 | putchar_unfiltered ('\n'); |
| 6088 | started_error_output = 0; |
| 6089 | } |
| 6090 | } |
| 6091 | } |
| 6092 | |
| 6093 | switch (ch) |
| 6094 | { |
| 6095 | case '+': |
| 6096 | if (remote_debug) |
| 6097 | fprintf_unfiltered (gdb_stdlog, "Ack\n"); |
| 6098 | return 1; |
| 6099 | case '-': |
| 6100 | if (remote_debug) |
| 6101 | fprintf_unfiltered (gdb_stdlog, "Nak\n"); |
| 6102 | case SERIAL_TIMEOUT: |
| 6103 | tcount++; |
| 6104 | if (tcount > 3) |
| 6105 | return 0; |
| 6106 | break; /* Retransmit buffer. */ |
| 6107 | case '$': |
| 6108 | { |
| 6109 | if (remote_debug) |
| 6110 | fprintf_unfiltered (gdb_stdlog, |
| 6111 | "Packet instead of Ack, ignoring it\n"); |
| 6112 | /* It's probably an old response sent because an ACK |
| 6113 | was lost. Gobble up the packet and ack it so it |
| 6114 | doesn't get retransmitted when we resend this |
| 6115 | packet. */ |
| 6116 | skip_frame (); |
| 6117 | serial_write (remote_desc, "+", 1); |
| 6118 | continue; /* Now, go look for +. */ |
| 6119 | } |
| 6120 | |
| 6121 | case '%': |
| 6122 | { |
| 6123 | int val; |
| 6124 | |
| 6125 | /* If we got a notification, handle it, and go back to looking |
| 6126 | for an ack. */ |
| 6127 | /* We've found the start of a notification. Now |
| 6128 | collect the data. */ |
| 6129 | val = read_frame (&rs->buf, &rs->buf_size); |
| 6130 | if (val >= 0) |
| 6131 | { |
| 6132 | if (remote_debug) |
| 6133 | { |
| 6134 | struct cleanup *old_chain; |
| 6135 | char *str; |
| 6136 | |
| 6137 | str = escape_buffer (rs->buf, val); |
| 6138 | old_chain = make_cleanup (xfree, str); |
| 6139 | fprintf_unfiltered (gdb_stdlog, |
| 6140 | " Notification received: %s\n", |
| 6141 | str); |
| 6142 | do_cleanups (old_chain); |
| 6143 | } |
| 6144 | handle_notification (rs->buf, val); |
| 6145 | /* We're in sync now, rewait for the ack. */ |
| 6146 | tcount = 0; |
| 6147 | } |
| 6148 | else |
| 6149 | { |
| 6150 | if (remote_debug) |
| 6151 | { |
| 6152 | if (!started_error_output) |
| 6153 | { |
| 6154 | started_error_output = 1; |
| 6155 | fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: "); |
| 6156 | } |
| 6157 | fputc_unfiltered (ch & 0177, gdb_stdlog); |
| 6158 | fprintf_unfiltered (gdb_stdlog, "%s", rs->buf); |
| 6159 | } |
| 6160 | } |
| 6161 | continue; |
| 6162 | } |
| 6163 | /* fall-through */ |
| 6164 | default: |
| 6165 | if (remote_debug) |
| 6166 | { |
| 6167 | if (!started_error_output) |
| 6168 | { |
| 6169 | started_error_output = 1; |
| 6170 | fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: "); |
| 6171 | } |
| 6172 | fputc_unfiltered (ch & 0177, gdb_stdlog); |
| 6173 | } |
| 6174 | continue; |
| 6175 | } |
| 6176 | break; /* Here to retransmit. */ |
| 6177 | } |
| 6178 | |
| 6179 | #if 0 |
| 6180 | /* This is wrong. If doing a long backtrace, the user should be |
| 6181 | able to get out next time we call QUIT, without anything as |
| 6182 | violent as interrupt_query. If we want to provide a way out of |
| 6183 | here without getting to the next QUIT, it should be based on |
| 6184 | hitting ^C twice as in remote_wait. */ |
| 6185 | if (quit_flag) |
| 6186 | { |
| 6187 | quit_flag = 0; |
| 6188 | interrupt_query (); |
| 6189 | } |
| 6190 | #endif |
| 6191 | } |
| 6192 | return 0; |
| 6193 | } |
| 6194 | |
| 6195 | /* Come here after finding the start of a frame when we expected an |
| 6196 | ack. Do our best to discard the rest of this packet. */ |
| 6197 | |
| 6198 | static void |
| 6199 | skip_frame (void) |
| 6200 | { |
| 6201 | int c; |
| 6202 | |
| 6203 | while (1) |
| 6204 | { |
| 6205 | c = readchar (remote_timeout); |
| 6206 | switch (c) |
| 6207 | { |
| 6208 | case SERIAL_TIMEOUT: |
| 6209 | /* Nothing we can do. */ |
| 6210 | return; |
| 6211 | case '#': |
| 6212 | /* Discard the two bytes of checksum and stop. */ |
| 6213 | c = readchar (remote_timeout); |
| 6214 | if (c >= 0) |
| 6215 | c = readchar (remote_timeout); |
| 6216 | |
| 6217 | return; |
| 6218 | case '*': /* Run length encoding. */ |
| 6219 | /* Discard the repeat count. */ |
| 6220 | c = readchar (remote_timeout); |
| 6221 | if (c < 0) |
| 6222 | return; |
| 6223 | break; |
| 6224 | default: |
| 6225 | /* A regular character. */ |
| 6226 | break; |
| 6227 | } |
| 6228 | } |
| 6229 | } |
| 6230 | |
| 6231 | /* Come here after finding the start of the frame. Collect the rest |
| 6232 | into *BUF, verifying the checksum, length, and handling run-length |
| 6233 | compression. NUL terminate the buffer. If there is not enough room, |
| 6234 | expand *BUF using xrealloc. |
| 6235 | |
| 6236 | Returns -1 on error, number of characters in buffer (ignoring the |
| 6237 | trailing NULL) on success. (could be extended to return one of the |
| 6238 | SERIAL status indications). */ |
| 6239 | |
| 6240 | static long |
| 6241 | read_frame (char **buf_p, |
| 6242 | long *sizeof_buf) |
| 6243 | { |
| 6244 | unsigned char csum; |
| 6245 | long bc; |
| 6246 | int c; |
| 6247 | char *buf = *buf_p; |
| 6248 | struct remote_state *rs = get_remote_state (); |
| 6249 | |
| 6250 | csum = 0; |
| 6251 | bc = 0; |
| 6252 | |
| 6253 | while (1) |
| 6254 | { |
| 6255 | c = readchar (remote_timeout); |
| 6256 | switch (c) |
| 6257 | { |
| 6258 | case SERIAL_TIMEOUT: |
| 6259 | if (remote_debug) |
| 6260 | fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog); |
| 6261 | return -1; |
| 6262 | case '$': |
| 6263 | if (remote_debug) |
| 6264 | fputs_filtered ("Saw new packet start in middle of old one\n", |
| 6265 | gdb_stdlog); |
| 6266 | return -1; /* Start a new packet, count retries. */ |
| 6267 | case '#': |
| 6268 | { |
| 6269 | unsigned char pktcsum; |
| 6270 | int check_0 = 0; |
| 6271 | int check_1 = 0; |
| 6272 | |
| 6273 | buf[bc] = '\0'; |
| 6274 | |
| 6275 | check_0 = readchar (remote_timeout); |
| 6276 | if (check_0 >= 0) |
| 6277 | check_1 = readchar (remote_timeout); |
| 6278 | |
| 6279 | if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT) |
| 6280 | { |
| 6281 | if (remote_debug) |
| 6282 | fputs_filtered ("Timeout in checksum, retrying\n", |
| 6283 | gdb_stdlog); |
| 6284 | return -1; |
| 6285 | } |
| 6286 | else if (check_0 < 0 || check_1 < 0) |
| 6287 | { |
| 6288 | if (remote_debug) |
| 6289 | fputs_filtered ("Communication error in checksum\n", |
| 6290 | gdb_stdlog); |
| 6291 | return -1; |
| 6292 | } |
| 6293 | |
| 6294 | /* Don't recompute the checksum; with no ack packets we |
| 6295 | don't have any way to indicate a packet retransmission |
| 6296 | is necessary. */ |
| 6297 | if (rs->noack_mode) |
| 6298 | return bc; |
| 6299 | |
| 6300 | pktcsum = (fromhex (check_0) << 4) | fromhex (check_1); |
| 6301 | if (csum == pktcsum) |
| 6302 | return bc; |
| 6303 | |
| 6304 | if (remote_debug) |
| 6305 | { |
| 6306 | struct cleanup *old_chain; |
| 6307 | char *str; |
| 6308 | |
| 6309 | str = escape_buffer (buf, bc); |
| 6310 | old_chain = make_cleanup (xfree, str); |
| 6311 | fprintf_unfiltered (gdb_stdlog, |
| 6312 | "\ |
| 6313 | Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", |
| 6314 | pktcsum, csum, str); |
| 6315 | do_cleanups (old_chain); |
| 6316 | } |
| 6317 | /* Number of characters in buffer ignoring trailing |
| 6318 | NULL. */ |
| 6319 | return -1; |
| 6320 | } |
| 6321 | case '*': /* Run length encoding. */ |
| 6322 | { |
| 6323 | int repeat; |
| 6324 | csum += c; |
| 6325 | |
| 6326 | c = readchar (remote_timeout); |
| 6327 | csum += c; |
| 6328 | repeat = c - ' ' + 3; /* Compute repeat count. */ |
| 6329 | |
| 6330 | /* The character before ``*'' is repeated. */ |
| 6331 | |
| 6332 | if (repeat > 0 && repeat <= 255 && bc > 0) |
| 6333 | { |
| 6334 | if (bc + repeat - 1 >= *sizeof_buf - 1) |
| 6335 | { |
| 6336 | /* Make some more room in the buffer. */ |
| 6337 | *sizeof_buf += repeat; |
| 6338 | *buf_p = xrealloc (*buf_p, *sizeof_buf); |
| 6339 | buf = *buf_p; |
| 6340 | } |
| 6341 | |
| 6342 | memset (&buf[bc], buf[bc - 1], repeat); |
| 6343 | bc += repeat; |
| 6344 | continue; |
| 6345 | } |
| 6346 | |
| 6347 | buf[bc] = '\0'; |
| 6348 | printf_filtered (_("Invalid run length encoding: %s\n"), buf); |
| 6349 | return -1; |
| 6350 | } |
| 6351 | default: |
| 6352 | if (bc >= *sizeof_buf - 1) |
| 6353 | { |
| 6354 | /* Make some more room in the buffer. */ |
| 6355 | *sizeof_buf *= 2; |
| 6356 | *buf_p = xrealloc (*buf_p, *sizeof_buf); |
| 6357 | buf = *buf_p; |
| 6358 | } |
| 6359 | |
| 6360 | buf[bc++] = c; |
| 6361 | csum += c; |
| 6362 | continue; |
| 6363 | } |
| 6364 | } |
| 6365 | } |
| 6366 | |
| 6367 | /* Read a packet from the remote machine, with error checking, and |
| 6368 | store it in *BUF. Resize *BUF using xrealloc if necessary to hold |
| 6369 | the result, and update *SIZEOF_BUF. If FOREVER, wait forever |
| 6370 | rather than timing out; this is used (in synchronous mode) to wait |
| 6371 | for a target that is is executing user code to stop. */ |
| 6372 | /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we |
| 6373 | don't have to change all the calls to getpkt to deal with the |
| 6374 | return value, because at the moment I don't know what the right |
| 6375 | thing to do it for those. */ |
| 6376 | void |
| 6377 | getpkt (char **buf, |
| 6378 | long *sizeof_buf, |
| 6379 | int forever) |
| 6380 | { |
| 6381 | int timed_out; |
| 6382 | |
| 6383 | timed_out = getpkt_sane (buf, sizeof_buf, forever); |
| 6384 | } |
| 6385 | |
| 6386 | |
| 6387 | /* Read a packet from the remote machine, with error checking, and |
| 6388 | store it in *BUF. Resize *BUF using xrealloc if necessary to hold |
| 6389 | the result, and update *SIZEOF_BUF. If FOREVER, wait forever |
| 6390 | rather than timing out; this is used (in synchronous mode) to wait |
| 6391 | for a target that is is executing user code to stop. If FOREVER == |
| 6392 | 0, this function is allowed to time out gracefully and return an |
| 6393 | indication of this to the caller. Otherwise return the number of |
| 6394 | bytes read. If EXPECTING_NOTIF, consider receiving a notification |
| 6395 | enough reason to return to the caller. */ |
| 6396 | |
| 6397 | static int |
| 6398 | getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever, |
| 6399 | int expecting_notif) |
| 6400 | { |
| 6401 | struct remote_state *rs = get_remote_state (); |
| 6402 | int c; |
| 6403 | int tries; |
| 6404 | int timeout; |
| 6405 | int val; |
| 6406 | |
| 6407 | /* We're reading a new response. Make sure we don't look at a |
| 6408 | previously cached response. */ |
| 6409 | rs->cached_wait_status = 0; |
| 6410 | |
| 6411 | strcpy (*buf, "timeout"); |
| 6412 | |
| 6413 | if (forever) |
| 6414 | timeout = watchdog > 0 ? watchdog : -1; |
| 6415 | else if (expecting_notif) |
| 6416 | timeout = 0; /* There should already be a char in the buffer. If |
| 6417 | not, bail out. */ |
| 6418 | else |
| 6419 | timeout = remote_timeout; |
| 6420 | |
| 6421 | #define MAX_TRIES 3 |
| 6422 | |
| 6423 | /* Process any number of notifications, and then return when |
| 6424 | we get a packet. */ |
| 6425 | for (;;) |
| 6426 | { |
| 6427 | /* If we get a timeout or bad checksm, retry up to MAX_TRIES |
| 6428 | times. */ |
| 6429 | for (tries = 1; tries <= MAX_TRIES; tries++) |
| 6430 | { |
| 6431 | /* This can loop forever if the remote side sends us |
| 6432 | characters continuously, but if it pauses, we'll get |
| 6433 | SERIAL_TIMEOUT from readchar because of timeout. Then |
| 6434 | we'll count that as a retry. |
| 6435 | |
| 6436 | Note that even when forever is set, we will only wait |
| 6437 | forever prior to the start of a packet. After that, we |
| 6438 | expect characters to arrive at a brisk pace. They should |
| 6439 | show up within remote_timeout intervals. */ |
| 6440 | do |
| 6441 | c = readchar (timeout); |
| 6442 | while (c != SERIAL_TIMEOUT && c != '$' && c != '%'); |
| 6443 | |
| 6444 | if (c == SERIAL_TIMEOUT) |
| 6445 | { |
| 6446 | if (expecting_notif) |
| 6447 | return -1; /* Don't complain, it's normal to not get |
| 6448 | anything in this case. */ |
| 6449 | |
| 6450 | if (forever) /* Watchdog went off? Kill the target. */ |
| 6451 | { |
| 6452 | QUIT; |
| 6453 | pop_target (); |
| 6454 | error (_("Watchdog timeout has expired. Target detached.")); |
| 6455 | } |
| 6456 | if (remote_debug) |
| 6457 | fputs_filtered ("Timed out.\n", gdb_stdlog); |
| 6458 | } |
| 6459 | else |
| 6460 | { |
| 6461 | /* We've found the start of a packet or notification. |
| 6462 | Now collect the data. */ |
| 6463 | val = read_frame (buf, sizeof_buf); |
| 6464 | if (val >= 0) |
| 6465 | break; |
| 6466 | } |
| 6467 | |
| 6468 | serial_write (remote_desc, "-", 1); |
| 6469 | } |
| 6470 | |
| 6471 | if (tries > MAX_TRIES) |
| 6472 | { |
| 6473 | /* We have tried hard enough, and just can't receive the |
| 6474 | packet/notification. Give up. */ |
| 6475 | printf_unfiltered (_("Ignoring packet error, continuing...\n")); |
| 6476 | |
| 6477 | /* Skip the ack char if we're in no-ack mode. */ |
| 6478 | if (!rs->noack_mode) |
| 6479 | serial_write (remote_desc, "+", 1); |
| 6480 | return -1; |
| 6481 | } |
| 6482 | |
| 6483 | /* If we got an ordinary packet, return that to our caller. */ |
| 6484 | if (c == '$') |
| 6485 | { |
| 6486 | if (remote_debug) |
| 6487 | { |
| 6488 | struct cleanup *old_chain; |
| 6489 | char *str; |
| 6490 | |
| 6491 | str = escape_buffer (*buf, val); |
| 6492 | old_chain = make_cleanup (xfree, str); |
| 6493 | fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str); |
| 6494 | do_cleanups (old_chain); |
| 6495 | } |
| 6496 | |
| 6497 | /* Skip the ack char if we're in no-ack mode. */ |
| 6498 | if (!rs->noack_mode) |
| 6499 | serial_write (remote_desc, "+", 1); |
| 6500 | return val; |
| 6501 | } |
| 6502 | |
| 6503 | /* If we got a notification, handle it, and go back to looking |
| 6504 | for a packet. */ |
| 6505 | else |
| 6506 | { |
| 6507 | gdb_assert (c == '%'); |
| 6508 | |
| 6509 | if (remote_debug) |
| 6510 | { |
| 6511 | struct cleanup *old_chain; |
| 6512 | char *str; |
| 6513 | |
| 6514 | str = escape_buffer (*buf, val); |
| 6515 | old_chain = make_cleanup (xfree, str); |
| 6516 | fprintf_unfiltered (gdb_stdlog, |
| 6517 | " Notification received: %s\n", |
| 6518 | str); |
| 6519 | do_cleanups (old_chain); |
| 6520 | } |
| 6521 | |
| 6522 | handle_notification (*buf, val); |
| 6523 | |
| 6524 | /* Notifications require no acknowledgement. */ |
| 6525 | |
| 6526 | if (expecting_notif) |
| 6527 | return -1; |
| 6528 | } |
| 6529 | } |
| 6530 | } |
| 6531 | |
| 6532 | static int |
| 6533 | getpkt_sane (char **buf, long *sizeof_buf, int forever) |
| 6534 | { |
| 6535 | return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0); |
| 6536 | } |
| 6537 | |
| 6538 | static int |
| 6539 | getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever) |
| 6540 | { |
| 6541 | return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1); |
| 6542 | } |
| 6543 | |
| 6544 | \f |
| 6545 | static void |
| 6546 | remote_kill (struct target_ops *ops) |
| 6547 | { |
| 6548 | /* Use catch_errors so the user can quit from gdb even when we |
| 6549 | aren't on speaking terms with the remote system. */ |
| 6550 | catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR); |
| 6551 | |
| 6552 | /* Don't wait for it to die. I'm not really sure it matters whether |
| 6553 | we do or not. For the existing stubs, kill is a noop. */ |
| 6554 | target_mourn_inferior (); |
| 6555 | } |
| 6556 | |
| 6557 | static int |
| 6558 | remote_vkill (int pid, struct remote_state *rs) |
| 6559 | { |
| 6560 | if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE) |
| 6561 | return -1; |
| 6562 | |
| 6563 | /* Tell the remote target to detach. */ |
| 6564 | sprintf (rs->buf, "vKill;%x", pid); |
| 6565 | putpkt (rs->buf); |
| 6566 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 6567 | |
| 6568 | if (packet_ok (rs->buf, |
| 6569 | &remote_protocol_packets[PACKET_vKill]) == PACKET_OK) |
| 6570 | return 0; |
| 6571 | else if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE) |
| 6572 | return -1; |
| 6573 | else |
| 6574 | return 1; |
| 6575 | } |
| 6576 | |
| 6577 | static void |
| 6578 | extended_remote_kill (struct target_ops *ops) |
| 6579 | { |
| 6580 | int res; |
| 6581 | int pid = ptid_get_pid (inferior_ptid); |
| 6582 | struct remote_state *rs = get_remote_state (); |
| 6583 | |
| 6584 | res = remote_vkill (pid, rs); |
| 6585 | if (res == -1 && !remote_multi_process_p (rs)) |
| 6586 | { |
| 6587 | /* Don't try 'k' on a multi-process aware stub -- it has no way |
| 6588 | to specify the pid. */ |
| 6589 | |
| 6590 | putpkt ("k"); |
| 6591 | #if 0 |
| 6592 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 6593 | if (rs->buf[0] != 'O' || rs->buf[0] != 'K') |
| 6594 | res = 1; |
| 6595 | #else |
| 6596 | /* Don't wait for it to die. I'm not really sure it matters whether |
| 6597 | we do or not. For the existing stubs, kill is a noop. */ |
| 6598 | res = 0; |
| 6599 | #endif |
| 6600 | } |
| 6601 | |
| 6602 | if (res != 0) |
| 6603 | error (_("Can't kill process")); |
| 6604 | |
| 6605 | target_mourn_inferior (); |
| 6606 | } |
| 6607 | |
| 6608 | static void |
| 6609 | remote_mourn (struct target_ops *ops) |
| 6610 | { |
| 6611 | remote_mourn_1 (ops); |
| 6612 | } |
| 6613 | |
| 6614 | /* Worker function for remote_mourn. */ |
| 6615 | static void |
| 6616 | remote_mourn_1 (struct target_ops *target) |
| 6617 | { |
| 6618 | unpush_target (target); |
| 6619 | |
| 6620 | /* remote_close takes care of doing most of the clean up. */ |
| 6621 | generic_mourn_inferior (); |
| 6622 | } |
| 6623 | |
| 6624 | static void |
| 6625 | extended_remote_mourn_1 (struct target_ops *target) |
| 6626 | { |
| 6627 | struct remote_state *rs = get_remote_state (); |
| 6628 | |
| 6629 | /* In case we got here due to an error, but we're going to stay |
| 6630 | connected. */ |
| 6631 | rs->waiting_for_stop_reply = 0; |
| 6632 | |
| 6633 | /* We're no longer interested in these events. */ |
| 6634 | discard_pending_stop_replies (ptid_get_pid (inferior_ptid)); |
| 6635 | |
| 6636 | /* If the current general thread belonged to the process we just |
| 6637 | detached from or has exited, the remote side current general |
| 6638 | thread becomes undefined. Considering a case like this: |
| 6639 | |
| 6640 | - We just got here due to a detach. |
| 6641 | - The process that we're detaching from happens to immediately |
| 6642 | report a global breakpoint being hit in non-stop mode, in the |
| 6643 | same thread we had selected before. |
| 6644 | - GDB attaches to this process again. |
| 6645 | - This event happens to be the next event we handle. |
| 6646 | |
| 6647 | GDB would consider that the current general thread didn't need to |
| 6648 | be set on the stub side (with Hg), since for all it knew, |
| 6649 | GENERAL_THREAD hadn't changed. |
| 6650 | |
| 6651 | Notice that although in all-stop mode, the remote server always |
| 6652 | sets the current thread to the thread reporting the stop event, |
| 6653 | that doesn't happen in non-stop mode; in non-stop, the stub *must |
| 6654 | not* change the current thread when reporting a breakpoint hit, |
| 6655 | due to the decoupling of event reporting and event handling. |
| 6656 | |
| 6657 | To keep things simple, we always invalidate our notion of the |
| 6658 | current thread. */ |
| 6659 | record_currthread (minus_one_ptid); |
| 6660 | |
| 6661 | /* Unlike "target remote", we do not want to unpush the target; then |
| 6662 | the next time the user says "run", we won't be connected. */ |
| 6663 | |
| 6664 | /* Call common code to mark the inferior as not running. */ |
| 6665 | generic_mourn_inferior (); |
| 6666 | |
| 6667 | if (!have_inferiors ()) |
| 6668 | { |
| 6669 | if (!remote_multi_process_p (rs)) |
| 6670 | { |
| 6671 | /* Check whether the target is running now - some remote stubs |
| 6672 | automatically restart after kill. */ |
| 6673 | putpkt ("?"); |
| 6674 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 6675 | |
| 6676 | if (rs->buf[0] == 'S' || rs->buf[0] == 'T') |
| 6677 | { |
| 6678 | /* Assume that the target has been restarted. Set inferior_ptid |
| 6679 | so that bits of core GDB realizes there's something here, e.g., |
| 6680 | so that the user can say "kill" again. */ |
| 6681 | inferior_ptid = magic_null_ptid; |
| 6682 | } |
| 6683 | else |
| 6684 | { |
| 6685 | /* Mark this (still pushed) target as not executable until we |
| 6686 | restart it. */ |
| 6687 | target_mark_exited (target); |
| 6688 | } |
| 6689 | } |
| 6690 | else |
| 6691 | /* Always remove execution if this was the last process. */ |
| 6692 | target_mark_exited (target); |
| 6693 | } |
| 6694 | } |
| 6695 | |
| 6696 | static void |
| 6697 | extended_remote_mourn (struct target_ops *ops) |
| 6698 | { |
| 6699 | extended_remote_mourn_1 (ops); |
| 6700 | } |
| 6701 | |
| 6702 | static int |
| 6703 | extended_remote_run (char *args) |
| 6704 | { |
| 6705 | struct remote_state *rs = get_remote_state (); |
| 6706 | char *p; |
| 6707 | int len; |
| 6708 | |
| 6709 | /* If the user has disabled vRun support, or we have detected that |
| 6710 | support is not available, do not try it. */ |
| 6711 | if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE) |
| 6712 | return -1; |
| 6713 | |
| 6714 | strcpy (rs->buf, "vRun;"); |
| 6715 | len = strlen (rs->buf); |
| 6716 | |
| 6717 | if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ()) |
| 6718 | error (_("Remote file name too long for run packet")); |
| 6719 | len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, 0); |
| 6720 | |
| 6721 | gdb_assert (args != NULL); |
| 6722 | if (*args) |
| 6723 | { |
| 6724 | struct cleanup *back_to; |
| 6725 | int i; |
| 6726 | char **argv; |
| 6727 | |
| 6728 | argv = gdb_buildargv (args); |
| 6729 | back_to = make_cleanup ((void (*) (void *)) freeargv, argv); |
| 6730 | for (i = 0; argv[i] != NULL; i++) |
| 6731 | { |
| 6732 | if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ()) |
| 6733 | error (_("Argument list too long for run packet")); |
| 6734 | rs->buf[len++] = ';'; |
| 6735 | len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, 0); |
| 6736 | } |
| 6737 | do_cleanups (back_to); |
| 6738 | } |
| 6739 | |
| 6740 | rs->buf[len++] = '\0'; |
| 6741 | |
| 6742 | putpkt (rs->buf); |
| 6743 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 6744 | |
| 6745 | if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]) == PACKET_OK) |
| 6746 | { |
| 6747 | /* We have a wait response; we don't need it, though. All is well. */ |
| 6748 | return 0; |
| 6749 | } |
| 6750 | else if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE) |
| 6751 | /* It wasn't disabled before, but it is now. */ |
| 6752 | return -1; |
| 6753 | else |
| 6754 | { |
| 6755 | if (remote_exec_file[0] == '\0') |
| 6756 | error (_("Running the default executable on the remote target failed; " |
| 6757 | "try \"set remote exec-file\"?")); |
| 6758 | else |
| 6759 | error (_("Running \"%s\" on the remote target failed"), |
| 6760 | remote_exec_file); |
| 6761 | } |
| 6762 | } |
| 6763 | |
| 6764 | /* In the extended protocol we want to be able to do things like |
| 6765 | "run" and have them basically work as expected. So we need |
| 6766 | a special create_inferior function. We support changing the |
| 6767 | executable file and the command line arguments, but not the |
| 6768 | environment. */ |
| 6769 | |
| 6770 | static void |
| 6771 | extended_remote_create_inferior_1 (char *exec_file, char *args, |
| 6772 | char **env, int from_tty) |
| 6773 | { |
| 6774 | /* If running asynchronously, register the target file descriptor |
| 6775 | with the event loop. */ |
| 6776 | if (target_can_async_p ()) |
| 6777 | target_async (inferior_event_handler, 0); |
| 6778 | |
| 6779 | /* Now restart the remote server. */ |
| 6780 | if (extended_remote_run (args) == -1) |
| 6781 | { |
| 6782 | /* vRun was not supported. Fail if we need it to do what the |
| 6783 | user requested. */ |
| 6784 | if (remote_exec_file[0]) |
| 6785 | error (_("Remote target does not support \"set remote exec-file\"")); |
| 6786 | if (args[0]) |
| 6787 | error (_("Remote target does not support \"set args\" or run <ARGS>")); |
| 6788 | |
| 6789 | /* Fall back to "R". */ |
| 6790 | extended_remote_restart (); |
| 6791 | } |
| 6792 | |
| 6793 | /* Clean up from the last time we ran, before we mark the target |
| 6794 | running again. This will mark breakpoints uninserted, and |
| 6795 | get_offsets may insert breakpoints. */ |
| 6796 | init_thread_list (); |
| 6797 | init_wait_for_inferior (); |
| 6798 | |
| 6799 | /* Now mark the inferior as running before we do anything else. */ |
| 6800 | inferior_ptid = magic_null_ptid; |
| 6801 | |
| 6802 | /* Now, if we have thread information, update inferior_ptid. */ |
| 6803 | inferior_ptid = remote_current_thread (inferior_ptid); |
| 6804 | |
| 6805 | remote_add_inferior (ptid_get_pid (inferior_ptid), 0); |
| 6806 | add_thread_silent (inferior_ptid); |
| 6807 | |
| 6808 | /* Get updated offsets, if the stub uses qOffsets. */ |
| 6809 | get_offsets (); |
| 6810 | } |
| 6811 | |
| 6812 | static void |
| 6813 | extended_remote_create_inferior (struct target_ops *ops, |
| 6814 | char *exec_file, char *args, |
| 6815 | char **env, int from_tty) |
| 6816 | { |
| 6817 | extended_remote_create_inferior_1 (exec_file, args, env, from_tty); |
| 6818 | } |
| 6819 | \f |
| 6820 | |
| 6821 | /* Insert a breakpoint. On targets that have software breakpoint |
| 6822 | support, we ask the remote target to do the work; on targets |
| 6823 | which don't, we insert a traditional memory breakpoint. */ |
| 6824 | |
| 6825 | static int |
| 6826 | remote_insert_breakpoint (struct bp_target_info *bp_tgt) |
| 6827 | { |
| 6828 | /* Try the "Z" s/w breakpoint packet if it is not already disabled. |
| 6829 | If it succeeds, then set the support to PACKET_ENABLE. If it |
| 6830 | fails, and the user has explicitly requested the Z support then |
| 6831 | report an error, otherwise, mark it disabled and go on. */ |
| 6832 | |
| 6833 | if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE) |
| 6834 | { |
| 6835 | CORE_ADDR addr = bp_tgt->placed_address; |
| 6836 | struct remote_state *rs; |
| 6837 | char *p; |
| 6838 | int bpsize; |
| 6839 | |
| 6840 | gdbarch_breakpoint_from_pc (target_gdbarch, &addr, &bpsize); |
| 6841 | |
| 6842 | rs = get_remote_state (); |
| 6843 | p = rs->buf; |
| 6844 | |
| 6845 | *(p++) = 'Z'; |
| 6846 | *(p++) = '0'; |
| 6847 | *(p++) = ','; |
| 6848 | addr = (ULONGEST) remote_address_masked (addr); |
| 6849 | p += hexnumstr (p, addr); |
| 6850 | sprintf (p, ",%d", bpsize); |
| 6851 | |
| 6852 | putpkt (rs->buf); |
| 6853 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 6854 | |
| 6855 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0])) |
| 6856 | { |
| 6857 | case PACKET_ERROR: |
| 6858 | return -1; |
| 6859 | case PACKET_OK: |
| 6860 | bp_tgt->placed_address = addr; |
| 6861 | bp_tgt->placed_size = bpsize; |
| 6862 | return 0; |
| 6863 | case PACKET_UNKNOWN: |
| 6864 | break; |
| 6865 | } |
| 6866 | } |
| 6867 | |
| 6868 | return memory_insert_breakpoint (bp_tgt); |
| 6869 | } |
| 6870 | |
| 6871 | static int |
| 6872 | remote_remove_breakpoint (struct bp_target_info *bp_tgt) |
| 6873 | { |
| 6874 | CORE_ADDR addr = bp_tgt->placed_address; |
| 6875 | struct remote_state *rs = get_remote_state (); |
| 6876 | int bp_size; |
| 6877 | |
| 6878 | if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE) |
| 6879 | { |
| 6880 | char *p = rs->buf; |
| 6881 | |
| 6882 | *(p++) = 'z'; |
| 6883 | *(p++) = '0'; |
| 6884 | *(p++) = ','; |
| 6885 | |
| 6886 | addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address); |
| 6887 | p += hexnumstr (p, addr); |
| 6888 | sprintf (p, ",%d", bp_tgt->placed_size); |
| 6889 | |
| 6890 | putpkt (rs->buf); |
| 6891 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 6892 | |
| 6893 | return (rs->buf[0] == 'E'); |
| 6894 | } |
| 6895 | |
| 6896 | return memory_remove_breakpoint (bp_tgt); |
| 6897 | } |
| 6898 | |
| 6899 | static int |
| 6900 | watchpoint_to_Z_packet (int type) |
| 6901 | { |
| 6902 | switch (type) |
| 6903 | { |
| 6904 | case hw_write: |
| 6905 | return Z_PACKET_WRITE_WP; |
| 6906 | break; |
| 6907 | case hw_read: |
| 6908 | return Z_PACKET_READ_WP; |
| 6909 | break; |
| 6910 | case hw_access: |
| 6911 | return Z_PACKET_ACCESS_WP; |
| 6912 | break; |
| 6913 | default: |
| 6914 | internal_error (__FILE__, __LINE__, |
| 6915 | _("hw_bp_to_z: bad watchpoint type %d"), type); |
| 6916 | } |
| 6917 | } |
| 6918 | |
| 6919 | static int |
| 6920 | remote_insert_watchpoint (CORE_ADDR addr, int len, int type) |
| 6921 | { |
| 6922 | struct remote_state *rs = get_remote_state (); |
| 6923 | char *p; |
| 6924 | enum Z_packet_type packet = watchpoint_to_Z_packet (type); |
| 6925 | |
| 6926 | if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE) |
| 6927 | return -1; |
| 6928 | |
| 6929 | sprintf (rs->buf, "Z%x,", packet); |
| 6930 | p = strchr (rs->buf, '\0'); |
| 6931 | addr = remote_address_masked (addr); |
| 6932 | p += hexnumstr (p, (ULONGEST) addr); |
| 6933 | sprintf (p, ",%x", len); |
| 6934 | |
| 6935 | putpkt (rs->buf); |
| 6936 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 6937 | |
| 6938 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet])) |
| 6939 | { |
| 6940 | case PACKET_ERROR: |
| 6941 | case PACKET_UNKNOWN: |
| 6942 | return -1; |
| 6943 | case PACKET_OK: |
| 6944 | return 0; |
| 6945 | } |
| 6946 | internal_error (__FILE__, __LINE__, |
| 6947 | _("remote_insert_watchpoint: reached end of function")); |
| 6948 | } |
| 6949 | |
| 6950 | |
| 6951 | static int |
| 6952 | remote_remove_watchpoint (CORE_ADDR addr, int len, int type) |
| 6953 | { |
| 6954 | struct remote_state *rs = get_remote_state (); |
| 6955 | char *p; |
| 6956 | enum Z_packet_type packet = watchpoint_to_Z_packet (type); |
| 6957 | |
| 6958 | if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE) |
| 6959 | return -1; |
| 6960 | |
| 6961 | sprintf (rs->buf, "z%x,", packet); |
| 6962 | p = strchr (rs->buf, '\0'); |
| 6963 | addr = remote_address_masked (addr); |
| 6964 | p += hexnumstr (p, (ULONGEST) addr); |
| 6965 | sprintf (p, ",%x", len); |
| 6966 | putpkt (rs->buf); |
| 6967 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 6968 | |
| 6969 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet])) |
| 6970 | { |
| 6971 | case PACKET_ERROR: |
| 6972 | case PACKET_UNKNOWN: |
| 6973 | return -1; |
| 6974 | case PACKET_OK: |
| 6975 | return 0; |
| 6976 | } |
| 6977 | internal_error (__FILE__, __LINE__, |
| 6978 | _("remote_remove_watchpoint: reached end of function")); |
| 6979 | } |
| 6980 | |
| 6981 | |
| 6982 | int remote_hw_watchpoint_limit = -1; |
| 6983 | int remote_hw_breakpoint_limit = -1; |
| 6984 | |
| 6985 | static int |
| 6986 | remote_check_watch_resources (int type, int cnt, int ot) |
| 6987 | { |
| 6988 | if (type == bp_hardware_breakpoint) |
| 6989 | { |
| 6990 | if (remote_hw_breakpoint_limit == 0) |
| 6991 | return 0; |
| 6992 | else if (remote_hw_breakpoint_limit < 0) |
| 6993 | return 1; |
| 6994 | else if (cnt <= remote_hw_breakpoint_limit) |
| 6995 | return 1; |
| 6996 | } |
| 6997 | else |
| 6998 | { |
| 6999 | if (remote_hw_watchpoint_limit == 0) |
| 7000 | return 0; |
| 7001 | else if (remote_hw_watchpoint_limit < 0) |
| 7002 | return 1; |
| 7003 | else if (ot) |
| 7004 | return -1; |
| 7005 | else if (cnt <= remote_hw_watchpoint_limit) |
| 7006 | return 1; |
| 7007 | } |
| 7008 | return -1; |
| 7009 | } |
| 7010 | |
| 7011 | static int |
| 7012 | remote_stopped_by_watchpoint (void) |
| 7013 | { |
| 7014 | return remote_stopped_by_watchpoint_p; |
| 7015 | } |
| 7016 | |
| 7017 | static int |
| 7018 | remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p) |
| 7019 | { |
| 7020 | int rc = 0; |
| 7021 | if (remote_stopped_by_watchpoint ()) |
| 7022 | { |
| 7023 | *addr_p = remote_watch_data_address; |
| 7024 | rc = 1; |
| 7025 | } |
| 7026 | |
| 7027 | return rc; |
| 7028 | } |
| 7029 | |
| 7030 | |
| 7031 | static int |
| 7032 | remote_insert_hw_breakpoint (struct bp_target_info *bp_tgt) |
| 7033 | { |
| 7034 | CORE_ADDR addr; |
| 7035 | struct remote_state *rs; |
| 7036 | char *p; |
| 7037 | |
| 7038 | /* The length field should be set to the size of a breakpoint |
| 7039 | instruction, even though we aren't inserting one ourselves. */ |
| 7040 | |
| 7041 | gdbarch_breakpoint_from_pc |
| 7042 | (target_gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size); |
| 7043 | |
| 7044 | if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE) |
| 7045 | return -1; |
| 7046 | |
| 7047 | rs = get_remote_state (); |
| 7048 | p = rs->buf; |
| 7049 | |
| 7050 | *(p++) = 'Z'; |
| 7051 | *(p++) = '1'; |
| 7052 | *(p++) = ','; |
| 7053 | |
| 7054 | addr = remote_address_masked (bp_tgt->placed_address); |
| 7055 | p += hexnumstr (p, (ULONGEST) addr); |
| 7056 | sprintf (p, ",%x", bp_tgt->placed_size); |
| 7057 | |
| 7058 | putpkt (rs->buf); |
| 7059 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 7060 | |
| 7061 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1])) |
| 7062 | { |
| 7063 | case PACKET_ERROR: |
| 7064 | case PACKET_UNKNOWN: |
| 7065 | return -1; |
| 7066 | case PACKET_OK: |
| 7067 | return 0; |
| 7068 | } |
| 7069 | internal_error (__FILE__, __LINE__, |
| 7070 | _("remote_insert_hw_breakpoint: reached end of function")); |
| 7071 | } |
| 7072 | |
| 7073 | |
| 7074 | static int |
| 7075 | remote_remove_hw_breakpoint (struct bp_target_info *bp_tgt) |
| 7076 | { |
| 7077 | CORE_ADDR addr; |
| 7078 | struct remote_state *rs = get_remote_state (); |
| 7079 | char *p = rs->buf; |
| 7080 | |
| 7081 | if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE) |
| 7082 | return -1; |
| 7083 | |
| 7084 | *(p++) = 'z'; |
| 7085 | *(p++) = '1'; |
| 7086 | *(p++) = ','; |
| 7087 | |
| 7088 | addr = remote_address_masked (bp_tgt->placed_address); |
| 7089 | p += hexnumstr (p, (ULONGEST) addr); |
| 7090 | sprintf (p, ",%x", bp_tgt->placed_size); |
| 7091 | |
| 7092 | putpkt (rs->buf); |
| 7093 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 7094 | |
| 7095 | switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1])) |
| 7096 | { |
| 7097 | case PACKET_ERROR: |
| 7098 | case PACKET_UNKNOWN: |
| 7099 | return -1; |
| 7100 | case PACKET_OK: |
| 7101 | return 0; |
| 7102 | } |
| 7103 | internal_error (__FILE__, __LINE__, |
| 7104 | _("remote_remove_hw_breakpoint: reached end of function")); |
| 7105 | } |
| 7106 | |
| 7107 | /* Table used by the crc32 function to calcuate the checksum. */ |
| 7108 | |
| 7109 | static unsigned long crc32_table[256] = |
| 7110 | {0, 0}; |
| 7111 | |
| 7112 | static unsigned long |
| 7113 | crc32 (unsigned char *buf, int len, unsigned int crc) |
| 7114 | { |
| 7115 | if (!crc32_table[1]) |
| 7116 | { |
| 7117 | /* Initialize the CRC table and the decoding table. */ |
| 7118 | int i, j; |
| 7119 | unsigned int c; |
| 7120 | |
| 7121 | for (i = 0; i < 256; i++) |
| 7122 | { |
| 7123 | for (c = i << 24, j = 8; j > 0; --j) |
| 7124 | c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1); |
| 7125 | crc32_table[i] = c; |
| 7126 | } |
| 7127 | } |
| 7128 | |
| 7129 | while (len--) |
| 7130 | { |
| 7131 | crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255]; |
| 7132 | buf++; |
| 7133 | } |
| 7134 | return crc; |
| 7135 | } |
| 7136 | |
| 7137 | /* compare-sections command |
| 7138 | |
| 7139 | With no arguments, compares each loadable section in the exec bfd |
| 7140 | with the same memory range on the target, and reports mismatches. |
| 7141 | Useful for verifying the image on the target against the exec file. |
| 7142 | Depends on the target understanding the new "qCRC:" request. */ |
| 7143 | |
| 7144 | /* FIXME: cagney/1999-10-26: This command should be broken down into a |
| 7145 | target method (target verify memory) and generic version of the |
| 7146 | actual command. This will allow other high-level code (especially |
| 7147 | generic_load()) to make use of this target functionality. */ |
| 7148 | |
| 7149 | static void |
| 7150 | compare_sections_command (char *args, int from_tty) |
| 7151 | { |
| 7152 | struct remote_state *rs = get_remote_state (); |
| 7153 | asection *s; |
| 7154 | unsigned long host_crc, target_crc; |
| 7155 | struct cleanup *old_chain; |
| 7156 | char *tmp; |
| 7157 | char *sectdata; |
| 7158 | const char *sectname; |
| 7159 | bfd_size_type size; |
| 7160 | bfd_vma lma; |
| 7161 | int matched = 0; |
| 7162 | int mismatched = 0; |
| 7163 | |
| 7164 | if (!exec_bfd) |
| 7165 | error (_("command cannot be used without an exec file")); |
| 7166 | if (!current_target.to_shortname || |
| 7167 | strcmp (current_target.to_shortname, "remote") != 0) |
| 7168 | error (_("command can only be used with remote target")); |
| 7169 | |
| 7170 | for (s = exec_bfd->sections; s; s = s->next) |
| 7171 | { |
| 7172 | if (!(s->flags & SEC_LOAD)) |
| 7173 | continue; /* skip non-loadable section */ |
| 7174 | |
| 7175 | size = bfd_get_section_size (s); |
| 7176 | if (size == 0) |
| 7177 | continue; /* skip zero-length section */ |
| 7178 | |
| 7179 | sectname = bfd_get_section_name (exec_bfd, s); |
| 7180 | if (args && strcmp (args, sectname) != 0) |
| 7181 | continue; /* not the section selected by user */ |
| 7182 | |
| 7183 | matched = 1; /* do this section */ |
| 7184 | lma = s->lma; |
| 7185 | /* FIXME: assumes lma can fit into long. */ |
| 7186 | xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx", |
| 7187 | (long) lma, (long) size); |
| 7188 | putpkt (rs->buf); |
| 7189 | |
| 7190 | /* Be clever; compute the host_crc before waiting for target |
| 7191 | reply. */ |
| 7192 | sectdata = xmalloc (size); |
| 7193 | old_chain = make_cleanup (xfree, sectdata); |
| 7194 | bfd_get_section_contents (exec_bfd, s, sectdata, 0, size); |
| 7195 | host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff); |
| 7196 | |
| 7197 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 7198 | if (rs->buf[0] == 'E') |
| 7199 | error (_("target memory fault, section %s, range 0x%s -- 0x%s"), |
| 7200 | sectname, paddr (lma), paddr (lma + size)); |
| 7201 | if (rs->buf[0] != 'C') |
| 7202 | error (_("remote target does not support this operation")); |
| 7203 | |
| 7204 | for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++) |
| 7205 | target_crc = target_crc * 16 + fromhex (*tmp); |
| 7206 | |
| 7207 | printf_filtered ("Section %s, range 0x%s -- 0x%s: ", |
| 7208 | sectname, paddr (lma), paddr (lma + size)); |
| 7209 | if (host_crc == target_crc) |
| 7210 | printf_filtered ("matched.\n"); |
| 7211 | else |
| 7212 | { |
| 7213 | printf_filtered ("MIS-MATCHED!\n"); |
| 7214 | mismatched++; |
| 7215 | } |
| 7216 | |
| 7217 | do_cleanups (old_chain); |
| 7218 | } |
| 7219 | if (mismatched > 0) |
| 7220 | warning (_("One or more sections of the remote executable does not match\n\ |
| 7221 | the loaded file\n")); |
| 7222 | if (args && !matched) |
| 7223 | printf_filtered (_("No loaded section named '%s'.\n"), args); |
| 7224 | } |
| 7225 | |
| 7226 | /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET |
| 7227 | into remote target. The number of bytes written to the remote |
| 7228 | target is returned, or -1 for error. */ |
| 7229 | |
| 7230 | static LONGEST |
| 7231 | remote_write_qxfer (struct target_ops *ops, const char *object_name, |
| 7232 | const char *annex, const gdb_byte *writebuf, |
| 7233 | ULONGEST offset, LONGEST len, |
| 7234 | struct packet_config *packet) |
| 7235 | { |
| 7236 | int i, buf_len; |
| 7237 | ULONGEST n; |
| 7238 | gdb_byte *wbuf; |
| 7239 | struct remote_state *rs = get_remote_state (); |
| 7240 | int max_size = get_memory_write_packet_size (); |
| 7241 | |
| 7242 | if (packet->support == PACKET_DISABLE) |
| 7243 | return -1; |
| 7244 | |
| 7245 | /* Insert header. */ |
| 7246 | i = snprintf (rs->buf, max_size, |
| 7247 | "qXfer:%s:write:%s:%s:", |
| 7248 | object_name, annex ? annex : "", |
| 7249 | phex_nz (offset, sizeof offset)); |
| 7250 | max_size -= (i + 1); |
| 7251 | |
| 7252 | /* Escape as much data as fits into rs->buf. */ |
| 7253 | buf_len = remote_escape_output |
| 7254 | (writebuf, len, (rs->buf + i), &max_size, max_size); |
| 7255 | |
| 7256 | if (putpkt_binary (rs->buf, i + buf_len) < 0 |
| 7257 | || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0 |
| 7258 | || packet_ok (rs->buf, packet) != PACKET_OK) |
| 7259 | return -1; |
| 7260 | |
| 7261 | unpack_varlen_hex (rs->buf, &n); |
| 7262 | return n; |
| 7263 | } |
| 7264 | |
| 7265 | /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet. |
| 7266 | Data at OFFSET, of up to LEN bytes, is read into READBUF; the |
| 7267 | number of bytes read is returned, or 0 for EOF, or -1 for error. |
| 7268 | The number of bytes read may be less than LEN without indicating an |
| 7269 | EOF. PACKET is checked and updated to indicate whether the remote |
| 7270 | target supports this object. */ |
| 7271 | |
| 7272 | static LONGEST |
| 7273 | remote_read_qxfer (struct target_ops *ops, const char *object_name, |
| 7274 | const char *annex, |
| 7275 | gdb_byte *readbuf, ULONGEST offset, LONGEST len, |
| 7276 | struct packet_config *packet) |
| 7277 | { |
| 7278 | static char *finished_object; |
| 7279 | static char *finished_annex; |
| 7280 | static ULONGEST finished_offset; |
| 7281 | |
| 7282 | struct remote_state *rs = get_remote_state (); |
| 7283 | unsigned int total = 0; |
| 7284 | LONGEST i, n, packet_len; |
| 7285 | |
| 7286 | if (packet->support == PACKET_DISABLE) |
| 7287 | return -1; |
| 7288 | |
| 7289 | /* Check whether we've cached an end-of-object packet that matches |
| 7290 | this request. */ |
| 7291 | if (finished_object) |
| 7292 | { |
| 7293 | if (strcmp (object_name, finished_object) == 0 |
| 7294 | && strcmp (annex ? annex : "", finished_annex) == 0 |
| 7295 | && offset == finished_offset) |
| 7296 | return 0; |
| 7297 | |
| 7298 | /* Otherwise, we're now reading something different. Discard |
| 7299 | the cache. */ |
| 7300 | xfree (finished_object); |
| 7301 | xfree (finished_annex); |
| 7302 | finished_object = NULL; |
| 7303 | finished_annex = NULL; |
| 7304 | } |
| 7305 | |
| 7306 | /* Request only enough to fit in a single packet. The actual data |
| 7307 | may not, since we don't know how much of it will need to be escaped; |
| 7308 | the target is free to respond with slightly less data. We subtract |
| 7309 | five to account for the response type and the protocol frame. */ |
| 7310 | n = min (get_remote_packet_size () - 5, len); |
| 7311 | snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s", |
| 7312 | object_name, annex ? annex : "", |
| 7313 | phex_nz (offset, sizeof offset), |
| 7314 | phex_nz (n, sizeof n)); |
| 7315 | i = putpkt (rs->buf); |
| 7316 | if (i < 0) |
| 7317 | return -1; |
| 7318 | |
| 7319 | rs->buf[0] = '\0'; |
| 7320 | packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0); |
| 7321 | if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK) |
| 7322 | return -1; |
| 7323 | |
| 7324 | if (rs->buf[0] != 'l' && rs->buf[0] != 'm') |
| 7325 | error (_("Unknown remote qXfer reply: %s"), rs->buf); |
| 7326 | |
| 7327 | /* 'm' means there is (or at least might be) more data after this |
| 7328 | batch. That does not make sense unless there's at least one byte |
| 7329 | of data in this reply. */ |
| 7330 | if (rs->buf[0] == 'm' && packet_len == 1) |
| 7331 | error (_("Remote qXfer reply contained no data.")); |
| 7332 | |
| 7333 | /* Got some data. */ |
| 7334 | i = remote_unescape_input (rs->buf + 1, packet_len - 1, readbuf, n); |
| 7335 | |
| 7336 | /* 'l' is an EOF marker, possibly including a final block of data, |
| 7337 | or possibly empty. If we have the final block of a non-empty |
| 7338 | object, record this fact to bypass a subsequent partial read. */ |
| 7339 | if (rs->buf[0] == 'l' && offset + i > 0) |
| 7340 | { |
| 7341 | finished_object = xstrdup (object_name); |
| 7342 | finished_annex = xstrdup (annex ? annex : ""); |
| 7343 | finished_offset = offset + i; |
| 7344 | } |
| 7345 | |
| 7346 | return i; |
| 7347 | } |
| 7348 | |
| 7349 | static LONGEST |
| 7350 | remote_xfer_partial (struct target_ops *ops, enum target_object object, |
| 7351 | const char *annex, gdb_byte *readbuf, |
| 7352 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) |
| 7353 | { |
| 7354 | struct remote_state *rs; |
| 7355 | int i; |
| 7356 | char *p2; |
| 7357 | char query_type; |
| 7358 | |
| 7359 | set_general_thread (inferior_ptid); |
| 7360 | |
| 7361 | rs = get_remote_state (); |
| 7362 | |
| 7363 | /* Handle memory using the standard memory routines. */ |
| 7364 | if (object == TARGET_OBJECT_MEMORY) |
| 7365 | { |
| 7366 | int xfered; |
| 7367 | errno = 0; |
| 7368 | |
| 7369 | /* If the remote target is connected but not running, we should |
| 7370 | pass this request down to a lower stratum (e.g. the executable |
| 7371 | file). */ |
| 7372 | if (!target_has_execution) |
| 7373 | return 0; |
| 7374 | |
| 7375 | if (writebuf != NULL) |
| 7376 | xfered = remote_write_bytes (offset, writebuf, len); |
| 7377 | else |
| 7378 | xfered = remote_read_bytes (offset, readbuf, len); |
| 7379 | |
| 7380 | if (xfered > 0) |
| 7381 | return xfered; |
| 7382 | else if (xfered == 0 && errno == 0) |
| 7383 | return 0; |
| 7384 | else |
| 7385 | return -1; |
| 7386 | } |
| 7387 | |
| 7388 | /* Handle SPU memory using qxfer packets. */ |
| 7389 | if (object == TARGET_OBJECT_SPU) |
| 7390 | { |
| 7391 | if (readbuf) |
| 7392 | return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len, |
| 7393 | &remote_protocol_packets |
| 7394 | [PACKET_qXfer_spu_read]); |
| 7395 | else |
| 7396 | return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len, |
| 7397 | &remote_protocol_packets |
| 7398 | [PACKET_qXfer_spu_write]); |
| 7399 | } |
| 7400 | |
| 7401 | /* Handle extra signal info using qxfer packets. */ |
| 7402 | if (object == TARGET_OBJECT_SIGNAL_INFO) |
| 7403 | { |
| 7404 | if (readbuf) |
| 7405 | return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len, |
| 7406 | &remote_protocol_packets |
| 7407 | [PACKET_qXfer_siginfo_read]); |
| 7408 | else |
| 7409 | return remote_write_qxfer (ops, "siginfo", annex, writebuf, offset, len, |
| 7410 | &remote_protocol_packets |
| 7411 | [PACKET_qXfer_siginfo_write]); |
| 7412 | } |
| 7413 | |
| 7414 | /* Only handle flash writes. */ |
| 7415 | if (writebuf != NULL) |
| 7416 | { |
| 7417 | LONGEST xfered; |
| 7418 | |
| 7419 | switch (object) |
| 7420 | { |
| 7421 | case TARGET_OBJECT_FLASH: |
| 7422 | xfered = remote_flash_write (ops, offset, len, writebuf); |
| 7423 | |
| 7424 | if (xfered > 0) |
| 7425 | return xfered; |
| 7426 | else if (xfered == 0 && errno == 0) |
| 7427 | return 0; |
| 7428 | else |
| 7429 | return -1; |
| 7430 | |
| 7431 | default: |
| 7432 | return -1; |
| 7433 | } |
| 7434 | } |
| 7435 | |
| 7436 | /* Map pre-existing objects onto letters. DO NOT do this for new |
| 7437 | objects!!! Instead specify new query packets. */ |
| 7438 | switch (object) |
| 7439 | { |
| 7440 | case TARGET_OBJECT_AVR: |
| 7441 | query_type = 'R'; |
| 7442 | break; |
| 7443 | |
| 7444 | case TARGET_OBJECT_AUXV: |
| 7445 | gdb_assert (annex == NULL); |
| 7446 | return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len, |
| 7447 | &remote_protocol_packets[PACKET_qXfer_auxv]); |
| 7448 | |
| 7449 | case TARGET_OBJECT_AVAILABLE_FEATURES: |
| 7450 | return remote_read_qxfer |
| 7451 | (ops, "features", annex, readbuf, offset, len, |
| 7452 | &remote_protocol_packets[PACKET_qXfer_features]); |
| 7453 | |
| 7454 | case TARGET_OBJECT_LIBRARIES: |
| 7455 | return remote_read_qxfer |
| 7456 | (ops, "libraries", annex, readbuf, offset, len, |
| 7457 | &remote_protocol_packets[PACKET_qXfer_libraries]); |
| 7458 | |
| 7459 | case TARGET_OBJECT_MEMORY_MAP: |
| 7460 | gdb_assert (annex == NULL); |
| 7461 | return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len, |
| 7462 | &remote_protocol_packets[PACKET_qXfer_memory_map]); |
| 7463 | |
| 7464 | case TARGET_OBJECT_OSDATA: |
| 7465 | /* Should only get here if we're connected. */ |
| 7466 | gdb_assert (remote_desc); |
| 7467 | return remote_read_qxfer |
| 7468 | (ops, "osdata", annex, readbuf, offset, len, |
| 7469 | &remote_protocol_packets[PACKET_qXfer_osdata]); |
| 7470 | |
| 7471 | default: |
| 7472 | return -1; |
| 7473 | } |
| 7474 | |
| 7475 | /* Note: a zero OFFSET and LEN can be used to query the minimum |
| 7476 | buffer size. */ |
| 7477 | if (offset == 0 && len == 0) |
| 7478 | return (get_remote_packet_size ()); |
| 7479 | /* Minimum outbuf size is get_remote_packet_size (). If LEN is not |
| 7480 | large enough let the caller deal with it. */ |
| 7481 | if (len < get_remote_packet_size ()) |
| 7482 | return -1; |
| 7483 | len = get_remote_packet_size (); |
| 7484 | |
| 7485 | /* Except for querying the minimum buffer size, target must be open. */ |
| 7486 | if (!remote_desc) |
| 7487 | error (_("remote query is only available after target open")); |
| 7488 | |
| 7489 | gdb_assert (annex != NULL); |
| 7490 | gdb_assert (readbuf != NULL); |
| 7491 | |
| 7492 | p2 = rs->buf; |
| 7493 | *p2++ = 'q'; |
| 7494 | *p2++ = query_type; |
| 7495 | |
| 7496 | /* We used one buffer char for the remote protocol q command and |
| 7497 | another for the query type. As the remote protocol encapsulation |
| 7498 | uses 4 chars plus one extra in case we are debugging |
| 7499 | (remote_debug), we have PBUFZIZ - 7 left to pack the query |
| 7500 | string. */ |
| 7501 | i = 0; |
| 7502 | while (annex[i] && (i < (get_remote_packet_size () - 8))) |
| 7503 | { |
| 7504 | /* Bad caller may have sent forbidden characters. */ |
| 7505 | gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#'); |
| 7506 | *p2++ = annex[i]; |
| 7507 | i++; |
| 7508 | } |
| 7509 | *p2 = '\0'; |
| 7510 | gdb_assert (annex[i] == '\0'); |
| 7511 | |
| 7512 | i = putpkt (rs->buf); |
| 7513 | if (i < 0) |
| 7514 | return i; |
| 7515 | |
| 7516 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 7517 | strcpy ((char *) readbuf, rs->buf); |
| 7518 | |
| 7519 | return strlen ((char *) readbuf); |
| 7520 | } |
| 7521 | |
| 7522 | static int |
| 7523 | remote_search_memory (struct target_ops* ops, |
| 7524 | CORE_ADDR start_addr, ULONGEST search_space_len, |
| 7525 | const gdb_byte *pattern, ULONGEST pattern_len, |
| 7526 | CORE_ADDR *found_addrp) |
| 7527 | { |
| 7528 | struct remote_state *rs = get_remote_state (); |
| 7529 | int max_size = get_memory_write_packet_size (); |
| 7530 | struct packet_config *packet = |
| 7531 | &remote_protocol_packets[PACKET_qSearch_memory]; |
| 7532 | /* number of packet bytes used to encode the pattern, |
| 7533 | this could be more than PATTERN_LEN due to escape characters */ |
| 7534 | int escaped_pattern_len; |
| 7535 | /* amount of pattern that was encodable in the packet */ |
| 7536 | int used_pattern_len; |
| 7537 | int i; |
| 7538 | int found; |
| 7539 | ULONGEST found_addr; |
| 7540 | |
| 7541 | /* Don't go to the target if we don't have to. |
| 7542 | This is done before checking packet->support to avoid the possibility that |
| 7543 | a success for this edge case means the facility works in general. */ |
| 7544 | if (pattern_len > search_space_len) |
| 7545 | return 0; |
| 7546 | if (pattern_len == 0) |
| 7547 | { |
| 7548 | *found_addrp = start_addr; |
| 7549 | return 1; |
| 7550 | } |
| 7551 | |
| 7552 | /* If we already know the packet isn't supported, fall back to the simple |
| 7553 | way of searching memory. */ |
| 7554 | |
| 7555 | if (packet->support == PACKET_DISABLE) |
| 7556 | { |
| 7557 | /* Target doesn't provided special support, fall back and use the |
| 7558 | standard support (copy memory and do the search here). */ |
| 7559 | return simple_search_memory (ops, start_addr, search_space_len, |
| 7560 | pattern, pattern_len, found_addrp); |
| 7561 | } |
| 7562 | |
| 7563 | /* Insert header. */ |
| 7564 | i = snprintf (rs->buf, max_size, |
| 7565 | "qSearch:memory:%s;%s;", |
| 7566 | paddr_nz (start_addr), |
| 7567 | phex_nz (search_space_len, sizeof (search_space_len))); |
| 7568 | max_size -= (i + 1); |
| 7569 | |
| 7570 | /* Escape as much data as fits into rs->buf. */ |
| 7571 | escaped_pattern_len = |
| 7572 | remote_escape_output (pattern, pattern_len, (rs->buf + i), |
| 7573 | &used_pattern_len, max_size); |
| 7574 | |
| 7575 | /* Bail if the pattern is too large. */ |
| 7576 | if (used_pattern_len != pattern_len) |
| 7577 | error ("Pattern is too large to transmit to remote target."); |
| 7578 | |
| 7579 | if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0 |
| 7580 | || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0 |
| 7581 | || packet_ok (rs->buf, packet) != PACKET_OK) |
| 7582 | { |
| 7583 | /* The request may not have worked because the command is not |
| 7584 | supported. If so, fall back to the simple way. */ |
| 7585 | if (packet->support == PACKET_DISABLE) |
| 7586 | { |
| 7587 | return simple_search_memory (ops, start_addr, search_space_len, |
| 7588 | pattern, pattern_len, found_addrp); |
| 7589 | } |
| 7590 | return -1; |
| 7591 | } |
| 7592 | |
| 7593 | if (rs->buf[0] == '0') |
| 7594 | found = 0; |
| 7595 | else if (rs->buf[0] == '1') |
| 7596 | { |
| 7597 | found = 1; |
| 7598 | if (rs->buf[1] != ',') |
| 7599 | error (_("Unknown qSearch:memory reply: %s"), rs->buf); |
| 7600 | unpack_varlen_hex (rs->buf + 2, &found_addr); |
| 7601 | *found_addrp = found_addr; |
| 7602 | } |
| 7603 | else |
| 7604 | error (_("Unknown qSearch:memory reply: %s"), rs->buf); |
| 7605 | |
| 7606 | return found; |
| 7607 | } |
| 7608 | |
| 7609 | static void |
| 7610 | remote_rcmd (char *command, |
| 7611 | struct ui_file *outbuf) |
| 7612 | { |
| 7613 | struct remote_state *rs = get_remote_state (); |
| 7614 | char *p = rs->buf; |
| 7615 | |
| 7616 | if (!remote_desc) |
| 7617 | error (_("remote rcmd is only available after target open")); |
| 7618 | |
| 7619 | /* Send a NULL command across as an empty command. */ |
| 7620 | if (command == NULL) |
| 7621 | command = ""; |
| 7622 | |
| 7623 | /* The query prefix. */ |
| 7624 | strcpy (rs->buf, "qRcmd,"); |
| 7625 | p = strchr (rs->buf, '\0'); |
| 7626 | |
| 7627 | if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/) > get_remote_packet_size ()) |
| 7628 | error (_("\"monitor\" command ``%s'' is too long."), command); |
| 7629 | |
| 7630 | /* Encode the actual command. */ |
| 7631 | bin2hex ((gdb_byte *) command, p, 0); |
| 7632 | |
| 7633 | if (putpkt (rs->buf) < 0) |
| 7634 | error (_("Communication problem with target.")); |
| 7635 | |
| 7636 | /* get/display the response */ |
| 7637 | while (1) |
| 7638 | { |
| 7639 | char *buf; |
| 7640 | |
| 7641 | /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */ |
| 7642 | rs->buf[0] = '\0'; |
| 7643 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 7644 | buf = rs->buf; |
| 7645 | if (buf[0] == '\0') |
| 7646 | error (_("Target does not support this command.")); |
| 7647 | if (buf[0] == 'O' && buf[1] != 'K') |
| 7648 | { |
| 7649 | remote_console_output (buf + 1); /* 'O' message from stub. */ |
| 7650 | continue; |
| 7651 | } |
| 7652 | if (strcmp (buf, "OK") == 0) |
| 7653 | break; |
| 7654 | if (strlen (buf) == 3 && buf[0] == 'E' |
| 7655 | && isdigit (buf[1]) && isdigit (buf[2])) |
| 7656 | { |
| 7657 | error (_("Protocol error with Rcmd")); |
| 7658 | } |
| 7659 | for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2) |
| 7660 | { |
| 7661 | char c = (fromhex (p[0]) << 4) + fromhex (p[1]); |
| 7662 | fputc_unfiltered (c, outbuf); |
| 7663 | } |
| 7664 | break; |
| 7665 | } |
| 7666 | } |
| 7667 | |
| 7668 | static VEC(mem_region_s) * |
| 7669 | remote_memory_map (struct target_ops *ops) |
| 7670 | { |
| 7671 | VEC(mem_region_s) *result = NULL; |
| 7672 | char *text = target_read_stralloc (¤t_target, |
| 7673 | TARGET_OBJECT_MEMORY_MAP, NULL); |
| 7674 | |
| 7675 | if (text) |
| 7676 | { |
| 7677 | struct cleanup *back_to = make_cleanup (xfree, text); |
| 7678 | result = parse_memory_map (text); |
| 7679 | do_cleanups (back_to); |
| 7680 | } |
| 7681 | |
| 7682 | return result; |
| 7683 | } |
| 7684 | |
| 7685 | static void |
| 7686 | packet_command (char *args, int from_tty) |
| 7687 | { |
| 7688 | struct remote_state *rs = get_remote_state (); |
| 7689 | |
| 7690 | if (!remote_desc) |
| 7691 | error (_("command can only be used with remote target")); |
| 7692 | |
| 7693 | if (!args) |
| 7694 | error (_("remote-packet command requires packet text as argument")); |
| 7695 | |
| 7696 | puts_filtered ("sending: "); |
| 7697 | print_packet (args); |
| 7698 | puts_filtered ("\n"); |
| 7699 | putpkt (args); |
| 7700 | |
| 7701 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 7702 | puts_filtered ("received: "); |
| 7703 | print_packet (rs->buf); |
| 7704 | puts_filtered ("\n"); |
| 7705 | } |
| 7706 | |
| 7707 | #if 0 |
| 7708 | /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */ |
| 7709 | |
| 7710 | static void display_thread_info (struct gdb_ext_thread_info *info); |
| 7711 | |
| 7712 | static void threadset_test_cmd (char *cmd, int tty); |
| 7713 | |
| 7714 | static void threadalive_test (char *cmd, int tty); |
| 7715 | |
| 7716 | static void threadlist_test_cmd (char *cmd, int tty); |
| 7717 | |
| 7718 | int get_and_display_threadinfo (threadref *ref); |
| 7719 | |
| 7720 | static void threadinfo_test_cmd (char *cmd, int tty); |
| 7721 | |
| 7722 | static int thread_display_step (threadref *ref, void *context); |
| 7723 | |
| 7724 | static void threadlist_update_test_cmd (char *cmd, int tty); |
| 7725 | |
| 7726 | static void init_remote_threadtests (void); |
| 7727 | |
| 7728 | #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */ |
| 7729 | |
| 7730 | static void |
| 7731 | threadset_test_cmd (char *cmd, int tty) |
| 7732 | { |
| 7733 | int sample_thread = SAMPLE_THREAD; |
| 7734 | |
| 7735 | printf_filtered (_("Remote threadset test\n")); |
| 7736 | set_general_thread (sample_thread); |
| 7737 | } |
| 7738 | |
| 7739 | |
| 7740 | static void |
| 7741 | threadalive_test (char *cmd, int tty) |
| 7742 | { |
| 7743 | int sample_thread = SAMPLE_THREAD; |
| 7744 | int pid = ptid_get_pid (inferior_ptid); |
| 7745 | ptid_t ptid = ptid_build (pid, 0, sample_thread); |
| 7746 | |
| 7747 | if (remote_thread_alive (ptid)) |
| 7748 | printf_filtered ("PASS: Thread alive test\n"); |
| 7749 | else |
| 7750 | printf_filtered ("FAIL: Thread alive test\n"); |
| 7751 | } |
| 7752 | |
| 7753 | void output_threadid (char *title, threadref *ref); |
| 7754 | |
| 7755 | void |
| 7756 | output_threadid (char *title, threadref *ref) |
| 7757 | { |
| 7758 | char hexid[20]; |
| 7759 | |
| 7760 | pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */ |
| 7761 | hexid[16] = 0; |
| 7762 | printf_filtered ("%s %s\n", title, (&hexid[0])); |
| 7763 | } |
| 7764 | |
| 7765 | static void |
| 7766 | threadlist_test_cmd (char *cmd, int tty) |
| 7767 | { |
| 7768 | int startflag = 1; |
| 7769 | threadref nextthread; |
| 7770 | int done, result_count; |
| 7771 | threadref threadlist[3]; |
| 7772 | |
| 7773 | printf_filtered ("Remote Threadlist test\n"); |
| 7774 | if (!remote_get_threadlist (startflag, &nextthread, 3, &done, |
| 7775 | &result_count, &threadlist[0])) |
| 7776 | printf_filtered ("FAIL: threadlist test\n"); |
| 7777 | else |
| 7778 | { |
| 7779 | threadref *scan = threadlist; |
| 7780 | threadref *limit = scan + result_count; |
| 7781 | |
| 7782 | while (scan < limit) |
| 7783 | output_threadid (" thread ", scan++); |
| 7784 | } |
| 7785 | } |
| 7786 | |
| 7787 | void |
| 7788 | display_thread_info (struct gdb_ext_thread_info *info) |
| 7789 | { |
| 7790 | output_threadid ("Threadid: ", &info->threadid); |
| 7791 | printf_filtered ("Name: %s\n ", info->shortname); |
| 7792 | printf_filtered ("State: %s\n", info->display); |
| 7793 | printf_filtered ("other: %s\n\n", info->more_display); |
| 7794 | } |
| 7795 | |
| 7796 | int |
| 7797 | get_and_display_threadinfo (threadref *ref) |
| 7798 | { |
| 7799 | int result; |
| 7800 | int set; |
| 7801 | struct gdb_ext_thread_info threadinfo; |
| 7802 | |
| 7803 | set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME |
| 7804 | | TAG_MOREDISPLAY | TAG_DISPLAY; |
| 7805 | if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo))) |
| 7806 | display_thread_info (&threadinfo); |
| 7807 | return result; |
| 7808 | } |
| 7809 | |
| 7810 | static void |
| 7811 | threadinfo_test_cmd (char *cmd, int tty) |
| 7812 | { |
| 7813 | int athread = SAMPLE_THREAD; |
| 7814 | threadref thread; |
| 7815 | int set; |
| 7816 | |
| 7817 | int_to_threadref (&thread, athread); |
| 7818 | printf_filtered ("Remote Threadinfo test\n"); |
| 7819 | if (!get_and_display_threadinfo (&thread)) |
| 7820 | printf_filtered ("FAIL cannot get thread info\n"); |
| 7821 | } |
| 7822 | |
| 7823 | static int |
| 7824 | thread_display_step (threadref *ref, void *context) |
| 7825 | { |
| 7826 | /* output_threadid(" threadstep ",ref); *//* simple test */ |
| 7827 | return get_and_display_threadinfo (ref); |
| 7828 | } |
| 7829 | |
| 7830 | static void |
| 7831 | threadlist_update_test_cmd (char *cmd, int tty) |
| 7832 | { |
| 7833 | printf_filtered ("Remote Threadlist update test\n"); |
| 7834 | remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS); |
| 7835 | } |
| 7836 | |
| 7837 | static void |
| 7838 | init_remote_threadtests (void) |
| 7839 | { |
| 7840 | add_com ("tlist", class_obscure, threadlist_test_cmd, _("\ |
| 7841 | Fetch and print the remote list of thread identifiers, one pkt only")); |
| 7842 | add_com ("tinfo", class_obscure, threadinfo_test_cmd, |
| 7843 | _("Fetch and display info about one thread")); |
| 7844 | add_com ("tset", class_obscure, threadset_test_cmd, |
| 7845 | _("Test setting to a different thread")); |
| 7846 | add_com ("tupd", class_obscure, threadlist_update_test_cmd, |
| 7847 | _("Iterate through updating all remote thread info")); |
| 7848 | add_com ("talive", class_obscure, threadalive_test, |
| 7849 | _(" Remote thread alive test ")); |
| 7850 | } |
| 7851 | |
| 7852 | #endif /* 0 */ |
| 7853 | |
| 7854 | /* Convert a thread ID to a string. Returns the string in a static |
| 7855 | buffer. */ |
| 7856 | |
| 7857 | static char * |
| 7858 | remote_pid_to_str (struct target_ops *ops, ptid_t ptid) |
| 7859 | { |
| 7860 | static char buf[64]; |
| 7861 | struct remote_state *rs = get_remote_state (); |
| 7862 | |
| 7863 | if (ptid_equal (magic_null_ptid, ptid)) |
| 7864 | { |
| 7865 | xsnprintf (buf, sizeof buf, "Thread <main>"); |
| 7866 | return buf; |
| 7867 | } |
| 7868 | else if (remote_multi_process_p (rs) |
| 7869 | && ptid_get_tid (ptid) != 0 && ptid_get_pid (ptid) != 0) |
| 7870 | { |
| 7871 | xsnprintf (buf, sizeof buf, "Thread %d.%ld", |
| 7872 | ptid_get_pid (ptid), ptid_get_tid (ptid)); |
| 7873 | return buf; |
| 7874 | } |
| 7875 | else if (ptid_get_tid (ptid) != 0) |
| 7876 | { |
| 7877 | xsnprintf (buf, sizeof buf, "Thread %ld", |
| 7878 | ptid_get_tid (ptid)); |
| 7879 | return buf; |
| 7880 | } |
| 7881 | |
| 7882 | return normal_pid_to_str (ptid); |
| 7883 | } |
| 7884 | |
| 7885 | /* Get the address of the thread local variable in OBJFILE which is |
| 7886 | stored at OFFSET within the thread local storage for thread PTID. */ |
| 7887 | |
| 7888 | static CORE_ADDR |
| 7889 | remote_get_thread_local_address (struct target_ops *ops, |
| 7890 | ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset) |
| 7891 | { |
| 7892 | if (remote_protocol_packets[PACKET_qGetTLSAddr].support != PACKET_DISABLE) |
| 7893 | { |
| 7894 | struct remote_state *rs = get_remote_state (); |
| 7895 | char *p = rs->buf; |
| 7896 | char *endp = rs->buf + get_remote_packet_size (); |
| 7897 | enum packet_result result; |
| 7898 | |
| 7899 | strcpy (p, "qGetTLSAddr:"); |
| 7900 | p += strlen (p); |
| 7901 | p = write_ptid (p, endp, ptid); |
| 7902 | *p++ = ','; |
| 7903 | p += hexnumstr (p, offset); |
| 7904 | *p++ = ','; |
| 7905 | p += hexnumstr (p, lm); |
| 7906 | *p++ = '\0'; |
| 7907 | |
| 7908 | putpkt (rs->buf); |
| 7909 | getpkt (&rs->buf, &rs->buf_size, 0); |
| 7910 | result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_qGetTLSAddr]); |
| 7911 | if (result == PACKET_OK) |
| 7912 | { |
| 7913 | ULONGEST result; |
| 7914 | |
| 7915 | unpack_varlen_hex (rs->buf, &result); |
| 7916 | return result; |
| 7917 | } |
| 7918 | else if (result == PACKET_UNKNOWN) |
| 7919 | throw_error (TLS_GENERIC_ERROR, |
| 7920 | _("Remote target doesn't support qGetTLSAddr packet")); |
| 7921 | else |
| 7922 | throw_error (TLS_GENERIC_ERROR, |
| 7923 | _("Remote target failed to process qGetTLSAddr request")); |
| 7924 | } |
| 7925 | else |
| 7926 | throw_error (TLS_GENERIC_ERROR, |
| 7927 | _("TLS not supported or disabled on this target")); |
| 7928 | /* Not reached. */ |
| 7929 | return 0; |
| 7930 | } |
| 7931 | |
| 7932 | /* Support for inferring a target description based on the current |
| 7933 | architecture and the size of a 'g' packet. While the 'g' packet |
| 7934 | can have any size (since optional registers can be left off the |
| 7935 | end), some sizes are easily recognizable given knowledge of the |
| 7936 | approximate architecture. */ |
| 7937 | |
| 7938 | struct remote_g_packet_guess |
| 7939 | { |
| 7940 | int bytes; |
| 7941 | const struct target_desc *tdesc; |
| 7942 | }; |
| 7943 | typedef struct remote_g_packet_guess remote_g_packet_guess_s; |
| 7944 | DEF_VEC_O(remote_g_packet_guess_s); |
| 7945 | |
| 7946 | struct remote_g_packet_data |
| 7947 | { |
| 7948 | VEC(remote_g_packet_guess_s) *guesses; |
| 7949 | }; |
| 7950 | |
| 7951 | static struct gdbarch_data *remote_g_packet_data_handle; |
| 7952 | |
| 7953 | static void * |
| 7954 | remote_g_packet_data_init (struct obstack *obstack) |
| 7955 | { |
| 7956 | return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data); |
| 7957 | } |
| 7958 | |
| 7959 | void |
| 7960 | register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes, |
| 7961 | const struct target_desc *tdesc) |
| 7962 | { |
| 7963 | struct remote_g_packet_data *data |
| 7964 | = gdbarch_data (gdbarch, remote_g_packet_data_handle); |
| 7965 | struct remote_g_packet_guess new_guess, *guess; |
| 7966 | int ix; |
| 7967 | |
| 7968 | gdb_assert (tdesc != NULL); |
| 7969 | |
| 7970 | for (ix = 0; |
| 7971 | VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess); |
| 7972 | ix++) |
| 7973 | if (guess->bytes == bytes) |
| 7974 | internal_error (__FILE__, __LINE__, |
| 7975 | "Duplicate g packet description added for size %d", |
| 7976 | bytes); |
| 7977 | |
| 7978 | new_guess.bytes = bytes; |
| 7979 | new_guess.tdesc = tdesc; |
| 7980 | VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess); |
| 7981 | } |
| 7982 | |
| 7983 | /* Return 1 if remote_read_description would do anything on this target |
| 7984 | and architecture, 0 otherwise. */ |
| 7985 | |
| 7986 | static int |
| 7987 | remote_read_description_p (struct target_ops *target) |
| 7988 | { |
| 7989 | struct remote_g_packet_data *data |
| 7990 | = gdbarch_data (target_gdbarch, remote_g_packet_data_handle); |
| 7991 | |
| 7992 | if (!VEC_empty (remote_g_packet_guess_s, data->guesses)) |
| 7993 | return 1; |
| 7994 | |
| 7995 | return 0; |
| 7996 | } |
| 7997 | |
| 7998 | static const struct target_desc * |
| 7999 | remote_read_description (struct target_ops *target) |
| 8000 | { |
| 8001 | struct remote_g_packet_data *data |
| 8002 | = gdbarch_data (target_gdbarch, remote_g_packet_data_handle); |
| 8003 | |
| 8004 | /* Do not try this during initial connection, when we do not know |
| 8005 | whether there is a running but stopped thread. */ |
| 8006 | if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid)) |
| 8007 | return NULL; |
| 8008 | |
| 8009 | if (!VEC_empty (remote_g_packet_guess_s, data->guesses)) |
| 8010 | { |
| 8011 | struct remote_g_packet_guess *guess; |
| 8012 | int ix; |
| 8013 | int bytes = send_g_packet (); |
| 8014 | |
| 8015 | for (ix = 0; |
| 8016 | VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess); |
| 8017 | ix++) |
| 8018 | if (guess->bytes == bytes) |
| 8019 | return guess->tdesc; |
| 8020 | |
| 8021 | /* We discard the g packet. A minor optimization would be to |
| 8022 | hold on to it, and fill the register cache once we have selected |
| 8023 | an architecture, but it's too tricky to do safely. */ |
| 8024 | } |
| 8025 | |
| 8026 | return NULL; |
| 8027 | } |
| 8028 | |
| 8029 | /* Remote file transfer support. This is host-initiated I/O, not |
| 8030 | target-initiated; for target-initiated, see remote-fileio.c. */ |
| 8031 | |
| 8032 | /* If *LEFT is at least the length of STRING, copy STRING to |
| 8033 | *BUFFER, update *BUFFER to point to the new end of the buffer, and |
| 8034 | decrease *LEFT. Otherwise raise an error. */ |
| 8035 | |
| 8036 | static void |
| 8037 | remote_buffer_add_string (char **buffer, int *left, char *string) |
| 8038 | { |
| 8039 | int len = strlen (string); |
| 8040 | |
| 8041 | if (len > *left) |
| 8042 | error (_("Packet too long for target.")); |
| 8043 | |
| 8044 | memcpy (*buffer, string, len); |
| 8045 | *buffer += len; |
| 8046 | *left -= len; |
| 8047 | |
| 8048 | /* NUL-terminate the buffer as a convenience, if there is |
| 8049 | room. */ |
| 8050 | if (*left) |
| 8051 | **buffer = '\0'; |
| 8052 | } |
| 8053 | |
| 8054 | /* If *LEFT is large enough, hex encode LEN bytes from BYTES into |
| 8055 | *BUFFER, update *BUFFER to point to the new end of the buffer, and |
| 8056 | decrease *LEFT. Otherwise raise an error. */ |
| 8057 | |
| 8058 | static void |
| 8059 | remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes, |
| 8060 | int len) |
| 8061 | { |
| 8062 | if (2 * len > *left) |
| 8063 | error (_("Packet too long for target.")); |
| 8064 | |
| 8065 | bin2hex (bytes, *buffer, len); |
| 8066 | *buffer += 2 * len; |
| 8067 | *left -= 2 * len; |
| 8068 | |
| 8069 | /* NUL-terminate the buffer as a convenience, if there is |
| 8070 | room. */ |
| 8071 | if (*left) |
| 8072 | **buffer = '\0'; |
| 8073 | } |
| 8074 | |
| 8075 | /* If *LEFT is large enough, convert VALUE to hex and add it to |
| 8076 | *BUFFER, update *BUFFER to point to the new end of the buffer, and |
| 8077 | decrease *LEFT. Otherwise raise an error. */ |
| 8078 | |
| 8079 | static void |
| 8080 | remote_buffer_add_int (char **buffer, int *left, ULONGEST value) |
| 8081 | { |
| 8082 | int len = hexnumlen (value); |
| 8083 | |
| 8084 | if (len > *left) |
| 8085 | error (_("Packet too long for target.")); |
| 8086 | |
| 8087 | hexnumstr (*buffer, value); |
| 8088 | *buffer += len; |
| 8089 | *left -= len; |
| 8090 | |
| 8091 | /* NUL-terminate the buffer as a convenience, if there is |
| 8092 | room. */ |
| 8093 | if (*left) |
| 8094 | **buffer = '\0'; |
| 8095 | } |
| 8096 | |
| 8097 | /* Parse an I/O result packet from BUFFER. Set RETCODE to the return |
| 8098 | value, *REMOTE_ERRNO to the remote error number or zero if none |
| 8099 | was included, and *ATTACHMENT to point to the start of the annex |
| 8100 | if any. The length of the packet isn't needed here; there may |
| 8101 | be NUL bytes in BUFFER, but they will be after *ATTACHMENT. |
| 8102 | |
| 8103 | Return 0 if the packet could be parsed, -1 if it could not. If |
| 8104 | -1 is returned, the other variables may not be initialized. */ |
| 8105 | |
| 8106 | static int |
| 8107 | remote_hostio_parse_result (char *buffer, int *retcode, |
| 8108 | int *remote_errno, char **attachment) |
| 8109 | { |
| 8110 | char *p, *p2; |
| 8111 | |
| 8112 | *remote_errno = 0; |
| 8113 | *attachment = NULL; |
| 8114 | |
| 8115 | if (buffer[0] != 'F') |
| 8116 | return -1; |
| 8117 | |
| 8118 | errno = 0; |
| 8119 | *retcode = strtol (&buffer[1], &p, 16); |
| 8120 | if (errno != 0 || p == &buffer[1]) |
| 8121 | return -1; |
| 8122 | |
| 8123 | /* Check for ",errno". */ |
| 8124 | if (*p == ',') |
| 8125 | { |
| 8126 | errno = 0; |
| 8127 | *remote_errno = strtol (p + 1, &p2, 16); |
| 8128 | if (errno != 0 || p + 1 == p2) |
| 8129 | return -1; |
| 8130 | p = p2; |
| 8131 | } |
| 8132 | |
| 8133 | /* Check for ";attachment". If there is no attachment, the |
| 8134 | packet should end here. */ |
| 8135 | if (*p == ';') |
| 8136 | { |
| 8137 | *attachment = p + 1; |
| 8138 | return 0; |
| 8139 | } |
| 8140 | else if (*p == '\0') |
| 8141 | return 0; |
| 8142 | else |
| 8143 | return -1; |
| 8144 | } |
| 8145 | |
| 8146 | /* Send a prepared I/O packet to the target and read its response. |
| 8147 | The prepared packet is in the global RS->BUF before this function |
| 8148 | is called, and the answer is there when we return. |
| 8149 | |
| 8150 | COMMAND_BYTES is the length of the request to send, which may include |
| 8151 | binary data. WHICH_PACKET is the packet configuration to check |
| 8152 | before attempting a packet. If an error occurs, *REMOTE_ERRNO |
| 8153 | is set to the error number and -1 is returned. Otherwise the value |
| 8154 | returned by the function is returned. |
| 8155 | |
| 8156 | ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an |
| 8157 | attachment is expected; an error will be reported if there's a |
| 8158 | mismatch. If one is found, *ATTACHMENT will be set to point into |
| 8159 | the packet buffer and *ATTACHMENT_LEN will be set to the |
| 8160 | attachment's length. */ |
| 8161 | |
| 8162 | static int |
| 8163 | remote_hostio_send_command (int command_bytes, int which_packet, |
| 8164 | int *remote_errno, char **attachment, |
| 8165 | int *attachment_len) |
| 8166 | { |
| 8167 | struct remote_state *rs = get_remote_state (); |
| 8168 | int ret, bytes_read; |
| 8169 | char *attachment_tmp; |
| 8170 | |
| 8171 | if (!remote_desc |
| 8172 | || remote_protocol_packets[which_packet].support == PACKET_DISABLE) |
| 8173 | { |
| 8174 | *remote_errno = FILEIO_ENOSYS; |
| 8175 | return -1; |
| 8176 | } |
| 8177 | |
| 8178 | putpkt_binary (rs->buf, command_bytes); |
| 8179 | bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0); |
| 8180 | |
| 8181 | /* If it timed out, something is wrong. Don't try to parse the |
| 8182 | buffer. */ |
| 8183 | if (bytes_read < 0) |
| 8184 | { |
| 8185 | *remote_errno = FILEIO_EINVAL; |
| 8186 | return -1; |
| 8187 | } |
| 8188 | |
| 8189 | switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet])) |
| 8190 | { |
| 8191 | case PACKET_ERROR: |
| 8192 | *remote_errno = FILEIO_EINVAL; |
| 8193 | return -1; |
| 8194 | case PACKET_UNKNOWN: |
| 8195 | *remote_errno = FILEIO_ENOSYS; |
| 8196 | return -1; |
| 8197 | case PACKET_OK: |
| 8198 | break; |
| 8199 | } |
| 8200 | |
| 8201 | if (remote_hostio_parse_result (rs->buf, &ret, remote_errno, |
| 8202 | &attachment_tmp)) |
| 8203 | { |
| 8204 | *remote_errno = FILEIO_EINVAL; |
| 8205 | return -1; |
| 8206 | } |
| 8207 | |
| 8208 | /* Make sure we saw an attachment if and only if we expected one. */ |
| 8209 | if ((attachment_tmp == NULL && attachment != NULL) |
| 8210 | || (attachment_tmp != NULL && attachment == NULL)) |
| 8211 | { |
| 8212 | *remote_errno = FILEIO_EINVAL; |
| 8213 | return -1; |
| 8214 | } |
| 8215 | |
| 8216 | /* If an attachment was found, it must point into the packet buffer; |
| 8217 | work out how many bytes there were. */ |
| 8218 | if (attachment_tmp != NULL) |
| 8219 | { |
| 8220 | *attachment = attachment_tmp; |
| 8221 | *attachment_len = bytes_read - (*attachment - rs->buf); |
| 8222 | } |
| 8223 | |
| 8224 | return ret; |
| 8225 | } |
| 8226 | |
| 8227 | /* Open FILENAME on the remote target, using FLAGS and MODE. Return a |
| 8228 | remote file descriptor, or -1 if an error occurs (and set |
| 8229 | *REMOTE_ERRNO). */ |
| 8230 | |
| 8231 | static int |
| 8232 | remote_hostio_open (const char *filename, int flags, int mode, |
| 8233 | int *remote_errno) |
| 8234 | { |
| 8235 | struct remote_state *rs = get_remote_state (); |
| 8236 | char *p = rs->buf; |
| 8237 | int left = get_remote_packet_size () - 1; |
| 8238 | |
| 8239 | remote_buffer_add_string (&p, &left, "vFile:open:"); |
| 8240 | |
| 8241 | remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename, |
| 8242 | strlen (filename)); |
| 8243 | remote_buffer_add_string (&p, &left, ","); |
| 8244 | |
| 8245 | remote_buffer_add_int (&p, &left, flags); |
| 8246 | remote_buffer_add_string (&p, &left, ","); |
| 8247 | |
| 8248 | remote_buffer_add_int (&p, &left, mode); |
| 8249 | |
| 8250 | return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open, |
| 8251 | remote_errno, NULL, NULL); |
| 8252 | } |
| 8253 | |
| 8254 | /* Write up to LEN bytes from WRITE_BUF to FD on the remote target. |
| 8255 | Return the number of bytes written, or -1 if an error occurs (and |
| 8256 | set *REMOTE_ERRNO). */ |
| 8257 | |
| 8258 | static int |
| 8259 | remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len, |
| 8260 | ULONGEST offset, int *remote_errno) |
| 8261 | { |
| 8262 | struct remote_state *rs = get_remote_state (); |
| 8263 | char *p = rs->buf; |
| 8264 | int left = get_remote_packet_size (); |
| 8265 | int out_len; |
| 8266 | |
| 8267 | remote_buffer_add_string (&p, &left, "vFile:pwrite:"); |
| 8268 | |
| 8269 | remote_buffer_add_int (&p, &left, fd); |
| 8270 | remote_buffer_add_string (&p, &left, ","); |
| 8271 | |
| 8272 | remote_buffer_add_int (&p, &left, offset); |
| 8273 | remote_buffer_add_string (&p, &left, ","); |
| 8274 | |
| 8275 | p += remote_escape_output (write_buf, len, p, &out_len, |
| 8276 | get_remote_packet_size () - (p - rs->buf)); |
| 8277 | |
| 8278 | return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite, |
| 8279 | remote_errno, NULL, NULL); |
| 8280 | } |
| 8281 | |
| 8282 | /* Read up to LEN bytes FD on the remote target into READ_BUF |
| 8283 | Return the number of bytes read, or -1 if an error occurs (and |
| 8284 | set *REMOTE_ERRNO). */ |
| 8285 | |
| 8286 | static int |
| 8287 | remote_hostio_pread (int fd, gdb_byte *read_buf, int len, |
| 8288 | ULONGEST offset, int *remote_errno) |
| 8289 | { |
| 8290 | struct remote_state *rs = get_remote_state (); |
| 8291 | char *p = rs->buf; |
| 8292 | char *attachment; |
| 8293 | int left = get_remote_packet_size (); |
| 8294 | int ret, attachment_len; |
| 8295 | int read_len; |
| 8296 | |
| 8297 | remote_buffer_add_string (&p, &left, "vFile:pread:"); |
| 8298 | |
| 8299 | remote_buffer_add_int (&p, &left, fd); |
| 8300 | remote_buffer_add_string (&p, &left, ","); |
| 8301 | |
| 8302 | remote_buffer_add_int (&p, &left, len); |
| 8303 | remote_buffer_add_string (&p, &left, ","); |
| 8304 | |
| 8305 | remote_buffer_add_int (&p, &left, offset); |
| 8306 | |
| 8307 | ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread, |
| 8308 | remote_errno, &attachment, |
| 8309 | &attachment_len); |
| 8310 | |
| 8311 | if (ret < 0) |
| 8312 | return ret; |
| 8313 | |
| 8314 | read_len = remote_unescape_input (attachment, attachment_len, |
| 8315 | read_buf, len); |
| 8316 | if (read_len != ret) |
| 8317 | error (_("Read returned %d, but %d bytes."), ret, (int) read_len); |
| 8318 | |
| 8319 | return ret; |
| 8320 | } |
| 8321 | |
| 8322 | /* Close FD on the remote target. Return 0, or -1 if an error occurs |
| 8323 | (and set *REMOTE_ERRNO). */ |
| 8324 | |
| 8325 | static int |
| 8326 | remote_hostio_close (int fd, int *remote_errno) |
| 8327 | { |
| 8328 | struct remote_state *rs = get_remote_state (); |
| 8329 | char *p = rs->buf; |
| 8330 | int left = get_remote_packet_size () - 1; |
| 8331 | |
| 8332 | remote_buffer_add_string (&p, &left, "vFile:close:"); |
| 8333 | |
| 8334 | remote_buffer_add_int (&p, &left, fd); |
| 8335 | |
| 8336 | return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close, |
| 8337 | remote_errno, NULL, NULL); |
| 8338 | } |
| 8339 | |
| 8340 | /* Unlink FILENAME on the remote target. Return 0, or -1 if an error |
| 8341 | occurs (and set *REMOTE_ERRNO). */ |
| 8342 | |
| 8343 | static int |
| 8344 | remote_hostio_unlink (const char *filename, int *remote_errno) |
| 8345 | { |
| 8346 | struct remote_state *rs = get_remote_state (); |
| 8347 | char *p = rs->buf; |
| 8348 | int left = get_remote_packet_size () - 1; |
| 8349 | |
| 8350 | remote_buffer_add_string (&p, &left, "vFile:unlink:"); |
| 8351 | |
| 8352 | remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename, |
| 8353 | strlen (filename)); |
| 8354 | |
| 8355 | return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink, |
| 8356 | remote_errno, NULL, NULL); |
| 8357 | } |
| 8358 | |
| 8359 | static int |
| 8360 | remote_fileio_errno_to_host (int errnum) |
| 8361 | { |
| 8362 | switch (errnum) |
| 8363 | { |
| 8364 | case FILEIO_EPERM: |
| 8365 | return EPERM; |
| 8366 | case FILEIO_ENOENT: |
| 8367 | return ENOENT; |
| 8368 | case FILEIO_EINTR: |
| 8369 | return EINTR; |
| 8370 | case FILEIO_EIO: |
| 8371 | return EIO; |
| 8372 | case FILEIO_EBADF: |
| 8373 | return EBADF; |
| 8374 | case FILEIO_EACCES: |
| 8375 | return EACCES; |
| 8376 | case FILEIO_EFAULT: |
| 8377 | return EFAULT; |
| 8378 | case FILEIO_EBUSY: |
| 8379 | return EBUSY; |
| 8380 | case FILEIO_EEXIST: |
| 8381 | return EEXIST; |
| 8382 | case FILEIO_ENODEV: |
| 8383 | return ENODEV; |
| 8384 | case FILEIO_ENOTDIR: |
| 8385 | return ENOTDIR; |
| 8386 | case FILEIO_EISDIR: |
| 8387 | return EISDIR; |
| 8388 | case FILEIO_EINVAL: |
| 8389 | return EINVAL; |
| 8390 | case FILEIO_ENFILE: |
| 8391 | return ENFILE; |
| 8392 | case FILEIO_EMFILE: |
| 8393 | return EMFILE; |
| 8394 | case FILEIO_EFBIG: |
| 8395 | return EFBIG; |
| 8396 | case FILEIO_ENOSPC: |
| 8397 | return ENOSPC; |
| 8398 | case FILEIO_ESPIPE: |
| 8399 | return ESPIPE; |
| 8400 | case FILEIO_EROFS: |
| 8401 | return EROFS; |
| 8402 | case FILEIO_ENOSYS: |
| 8403 | return ENOSYS; |
| 8404 | case FILEIO_ENAMETOOLONG: |
| 8405 | return ENAMETOOLONG; |
| 8406 | } |
| 8407 | return -1; |
| 8408 | } |
| 8409 | |
| 8410 | static char * |
| 8411 | remote_hostio_error (int errnum) |
| 8412 | { |
| 8413 | int host_error = remote_fileio_errno_to_host (errnum); |
| 8414 | |
| 8415 | if (host_error == -1) |
| 8416 | error (_("Unknown remote I/O error %d"), errnum); |
| 8417 | else |
| 8418 | error (_("Remote I/O error: %s"), safe_strerror (host_error)); |
| 8419 | } |
| 8420 | |
| 8421 | static void |
| 8422 | remote_hostio_close_cleanup (void *opaque) |
| 8423 | { |
| 8424 | int fd = *(int *) opaque; |
| 8425 | int remote_errno; |
| 8426 | |
| 8427 | remote_hostio_close (fd, &remote_errno); |
| 8428 | } |
| 8429 | |
| 8430 | |
| 8431 | static void * |
| 8432 | remote_bfd_iovec_open (struct bfd *abfd, void *open_closure) |
| 8433 | { |
| 8434 | const char *filename = bfd_get_filename (abfd); |
| 8435 | int fd, remote_errno; |
| 8436 | int *stream; |
| 8437 | |
| 8438 | gdb_assert (remote_filename_p (filename)); |
| 8439 | |
| 8440 | fd = remote_hostio_open (filename + 7, FILEIO_O_RDONLY, 0, &remote_errno); |
| 8441 | if (fd == -1) |
| 8442 | { |
| 8443 | errno = remote_fileio_errno_to_host (remote_errno); |
| 8444 | bfd_set_error (bfd_error_system_call); |
| 8445 | return NULL; |
| 8446 | } |
| 8447 | |
| 8448 | stream = xmalloc (sizeof (int)); |
| 8449 | *stream = fd; |
| 8450 | return stream; |
| 8451 | } |
| 8452 | |
| 8453 | static int |
| 8454 | remote_bfd_iovec_close (struct bfd *abfd, void *stream) |
| 8455 | { |
| 8456 | int fd = *(int *)stream; |
| 8457 | int remote_errno; |
| 8458 | |
| 8459 | xfree (stream); |
| 8460 | |
| 8461 | /* Ignore errors on close; these may happen if the remote |
| 8462 | connection was already torn down. */ |
| 8463 | remote_hostio_close (fd, &remote_errno); |
| 8464 | |
| 8465 | return 1; |
| 8466 | } |
| 8467 | |
| 8468 | static file_ptr |
| 8469 | remote_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf, |
| 8470 | file_ptr nbytes, file_ptr offset) |
| 8471 | { |
| 8472 | int fd = *(int *)stream; |
| 8473 | int remote_errno; |
| 8474 | file_ptr pos, bytes; |
| 8475 | |
| 8476 | pos = 0; |
| 8477 | while (nbytes > pos) |
| 8478 | { |
| 8479 | bytes = remote_hostio_pread (fd, (char *)buf + pos, nbytes - pos, |
| 8480 | offset + pos, &remote_errno); |
| 8481 | if (bytes == 0) |
| 8482 | /* Success, but no bytes, means end-of-file. */ |
| 8483 | break; |
| 8484 | if (bytes == -1) |
| 8485 | { |
| 8486 | errno = remote_fileio_errno_to_host (remote_errno); |
| 8487 | bfd_set_error (bfd_error_system_call); |
| 8488 | return -1; |
| 8489 | } |
| 8490 | |
| 8491 | pos += bytes; |
| 8492 | } |
| 8493 | |
| 8494 | return pos; |
| 8495 | } |
| 8496 | |
| 8497 | static int |
| 8498 | remote_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb) |
| 8499 | { |
| 8500 | /* FIXME: We should probably implement remote_hostio_stat. */ |
| 8501 | sb->st_size = INT_MAX; |
| 8502 | return 0; |
| 8503 | } |
| 8504 | |
| 8505 | int |
| 8506 | remote_filename_p (const char *filename) |
| 8507 | { |
| 8508 | return strncmp (filename, "remote:", 7) == 0; |
| 8509 | } |
| 8510 | |
| 8511 | bfd * |
| 8512 | remote_bfd_open (const char *remote_file, const char *target) |
| 8513 | { |
| 8514 | return bfd_openr_iovec (remote_file, target, |
| 8515 | remote_bfd_iovec_open, NULL, |
| 8516 | remote_bfd_iovec_pread, |
| 8517 | remote_bfd_iovec_close, |
| 8518 | remote_bfd_iovec_stat); |
| 8519 | } |
| 8520 | |
| 8521 | void |
| 8522 | remote_file_put (const char *local_file, const char *remote_file, int from_tty) |
| 8523 | { |
| 8524 | struct cleanup *back_to, *close_cleanup; |
| 8525 | int retcode, fd, remote_errno, bytes, io_size; |
| 8526 | FILE *file; |
| 8527 | gdb_byte *buffer; |
| 8528 | int bytes_in_buffer; |
| 8529 | int saw_eof; |
| 8530 | ULONGEST offset; |
| 8531 | |
| 8532 | if (!remote_desc) |
| 8533 | error (_("command can only be used with remote target")); |
| 8534 | |
| 8535 | file = fopen (local_file, "rb"); |
| 8536 | if (file == NULL) |
| 8537 | perror_with_name (local_file); |
| 8538 | back_to = make_cleanup_fclose (file); |
| 8539 | |
| 8540 | fd = remote_hostio_open (remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT |
| 8541 | | FILEIO_O_TRUNC), |
| 8542 | 0700, &remote_errno); |
| 8543 | if (fd == -1) |
| 8544 | remote_hostio_error (remote_errno); |
| 8545 | |
| 8546 | /* Send up to this many bytes at once. They won't all fit in the |
| 8547 | remote packet limit, so we'll transfer slightly fewer. */ |
| 8548 | io_size = get_remote_packet_size (); |
| 8549 | buffer = xmalloc (io_size); |
| 8550 | make_cleanup (xfree, buffer); |
| 8551 | |
| 8552 | close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd); |
| 8553 | |
| 8554 | bytes_in_buffer = 0; |
| 8555 | saw_eof = 0; |
| 8556 | offset = 0; |
| 8557 | while (bytes_in_buffer || !saw_eof) |
| 8558 | { |
| 8559 | if (!saw_eof) |
| 8560 | { |
| 8561 | bytes = fread (buffer + bytes_in_buffer, 1, io_size - bytes_in_buffer, |
| 8562 | file); |
| 8563 | if (bytes == 0) |
| 8564 | { |
| 8565 | if (ferror (file)) |
| 8566 | error (_("Error reading %s."), local_file); |
| 8567 | else |
| 8568 | { |
| 8569 | /* EOF. Unless there is something still in the |
| 8570 | buffer from the last iteration, we are done. */ |
| 8571 | saw_eof = 1; |
| 8572 | if (bytes_in_buffer == 0) |
| 8573 | break; |
| 8574 | } |
| 8575 | } |
| 8576 | } |
| 8577 | else |
| 8578 | bytes = 0; |
| 8579 | |
| 8580 | bytes += bytes_in_buffer; |
| 8581 | bytes_in_buffer = 0; |
| 8582 | |
| 8583 | retcode = remote_hostio_pwrite (fd, buffer, bytes, offset, &remote_errno); |
| 8584 | |
| 8585 | if (retcode < 0) |
| 8586 | remote_hostio_error (remote_errno); |
| 8587 | else if (retcode == 0) |
| 8588 | error (_("Remote write of %d bytes returned 0!"), bytes); |
| 8589 | else if (retcode < bytes) |
| 8590 | { |
| 8591 | /* Short write. Save the rest of the read data for the next |
| 8592 | write. */ |
| 8593 | bytes_in_buffer = bytes - retcode; |
| 8594 | memmove (buffer, buffer + retcode, bytes_in_buffer); |
| 8595 | } |
| 8596 | |
| 8597 | offset += retcode; |
| 8598 | } |
| 8599 | |
| 8600 | discard_cleanups (close_cleanup); |
| 8601 | if (remote_hostio_close (fd, &remote_errno)) |
| 8602 | remote_hostio_error (remote_errno); |
| 8603 | |
| 8604 | if (from_tty) |
| 8605 | printf_filtered (_("Successfully sent file \"%s\".\n"), local_file); |
| 8606 | do_cleanups (back_to); |
| 8607 | } |
| 8608 | |
| 8609 | void |
| 8610 | remote_file_get (const char *remote_file, const char *local_file, int from_tty) |
| 8611 | { |
| 8612 | struct cleanup *back_to, *close_cleanup; |
| 8613 | int retcode, fd, remote_errno, bytes, io_size; |
| 8614 | FILE *file; |
| 8615 | gdb_byte *buffer; |
| 8616 | ULONGEST offset; |
| 8617 | |
| 8618 | if (!remote_desc) |
| 8619 | error (_("command can only be used with remote target")); |
| 8620 | |
| 8621 | fd = remote_hostio_open (remote_file, FILEIO_O_RDONLY, 0, &remote_errno); |
| 8622 | if (fd == -1) |
| 8623 | remote_hostio_error (remote_errno); |
| 8624 | |
| 8625 | file = fopen (local_file, "wb"); |
| 8626 | if (file == NULL) |
| 8627 | perror_with_name (local_file); |
| 8628 | back_to = make_cleanup_fclose (file); |
| 8629 | |
| 8630 | /* Send up to this many bytes at once. They won't all fit in the |
| 8631 | remote packet limit, so we'll transfer slightly fewer. */ |
| 8632 | io_size = get_remote_packet_size (); |
| 8633 | buffer = xmalloc (io_size); |
| 8634 | make_cleanup (xfree, buffer); |
| 8635 | |
| 8636 | close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd); |
| 8637 | |
| 8638 | offset = 0; |
| 8639 | while (1) |
| 8640 | { |
| 8641 | bytes = remote_hostio_pread (fd, buffer, io_size, offset, &remote_errno); |
| 8642 | if (bytes == 0) |
| 8643 | /* Success, but no bytes, means end-of-file. */ |
| 8644 | break; |
| 8645 | if (bytes == -1) |
| 8646 | remote_hostio_error (remote_errno); |
| 8647 | |
| 8648 | offset += bytes; |
| 8649 | |
| 8650 | bytes = fwrite (buffer, 1, bytes, file); |
| 8651 | if (bytes == 0) |
| 8652 | perror_with_name (local_file); |
| 8653 | } |
| 8654 | |
| 8655 | discard_cleanups (close_cleanup); |
| 8656 | if (remote_hostio_close (fd, &remote_errno)) |
| 8657 | remote_hostio_error (remote_errno); |
| 8658 | |
| 8659 | if (from_tty) |
| 8660 | printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file); |
| 8661 | do_cleanups (back_to); |
| 8662 | } |
| 8663 | |
| 8664 | void |
| 8665 | remote_file_delete (const char *remote_file, int from_tty) |
| 8666 | { |
| 8667 | int retcode, remote_errno; |
| 8668 | |
| 8669 | if (!remote_desc) |
| 8670 | error (_("command can only be used with remote target")); |
| 8671 | |
| 8672 | retcode = remote_hostio_unlink (remote_file, &remote_errno); |
| 8673 | if (retcode == -1) |
| 8674 | remote_hostio_error (remote_errno); |
| 8675 | |
| 8676 | if (from_tty) |
| 8677 | printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file); |
| 8678 | } |
| 8679 | |
| 8680 | static void |
| 8681 | remote_put_command (char *args, int from_tty) |
| 8682 | { |
| 8683 | struct cleanup *back_to; |
| 8684 | char **argv; |
| 8685 | |
| 8686 | if (args == NULL) |
| 8687 | error_no_arg (_("file to put")); |
| 8688 | |
| 8689 | argv = gdb_buildargv (args); |
| 8690 | back_to = make_cleanup_freeargv (argv); |
| 8691 | if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL) |
| 8692 | error (_("Invalid parameters to remote put")); |
| 8693 | |
| 8694 | remote_file_put (argv[0], argv[1], from_tty); |
| 8695 | |
| 8696 | do_cleanups (back_to); |
| 8697 | } |
| 8698 | |
| 8699 | static void |
| 8700 | remote_get_command (char *args, int from_tty) |
| 8701 | { |
| 8702 | struct cleanup *back_to; |
| 8703 | char **argv; |
| 8704 | |
| 8705 | if (args == NULL) |
| 8706 | error_no_arg (_("file to get")); |
| 8707 | |
| 8708 | argv = gdb_buildargv (args); |
| 8709 | back_to = make_cleanup_freeargv (argv); |
| 8710 | if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL) |
| 8711 | error (_("Invalid parameters to remote get")); |
| 8712 | |
| 8713 | remote_file_get (argv[0], argv[1], from_tty); |
| 8714 | |
| 8715 | do_cleanups (back_to); |
| 8716 | } |
| 8717 | |
| 8718 | static void |
| 8719 | remote_delete_command (char *args, int from_tty) |
| 8720 | { |
| 8721 | struct cleanup *back_to; |
| 8722 | char **argv; |
| 8723 | |
| 8724 | if (args == NULL) |
| 8725 | error_no_arg (_("file to delete")); |
| 8726 | |
| 8727 | argv = gdb_buildargv (args); |
| 8728 | back_to = make_cleanup_freeargv (argv); |
| 8729 | if (argv[0] == NULL || argv[1] != NULL) |
| 8730 | error (_("Invalid parameters to remote delete")); |
| 8731 | |
| 8732 | remote_file_delete (argv[0], from_tty); |
| 8733 | |
| 8734 | do_cleanups (back_to); |
| 8735 | } |
| 8736 | |
| 8737 | static void |
| 8738 | remote_command (char *args, int from_tty) |
| 8739 | { |
| 8740 | help_list (remote_cmdlist, "remote ", -1, gdb_stdout); |
| 8741 | } |
| 8742 | |
| 8743 | static int remote_target_can_reverse = 1; |
| 8744 | |
| 8745 | static int |
| 8746 | remote_can_execute_reverse (void) |
| 8747 | { |
| 8748 | return remote_target_can_reverse; |
| 8749 | } |
| 8750 | |
| 8751 | static int |
| 8752 | remote_supports_non_stop (void) |
| 8753 | { |
| 8754 | return 1; |
| 8755 | } |
| 8756 | |
| 8757 | static int |
| 8758 | remote_supports_multi_process (void) |
| 8759 | { |
| 8760 | struct remote_state *rs = get_remote_state (); |
| 8761 | return remote_multi_process_p (rs); |
| 8762 | } |
| 8763 | |
| 8764 | static void |
| 8765 | init_remote_ops (void) |
| 8766 | { |
| 8767 | remote_ops.to_shortname = "remote"; |
| 8768 | remote_ops.to_longname = "Remote serial target in gdb-specific protocol"; |
| 8769 | remote_ops.to_doc = |
| 8770 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ |
| 8771 | Specify the serial device it is connected to\n\ |
| 8772 | (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."; |
| 8773 | remote_ops.to_open = remote_open; |
| 8774 | remote_ops.to_close = remote_close; |
| 8775 | remote_ops.to_detach = remote_detach; |
| 8776 | remote_ops.to_disconnect = remote_disconnect; |
| 8777 | remote_ops.to_resume = remote_resume; |
| 8778 | remote_ops.to_wait = remote_wait; |
| 8779 | remote_ops.to_fetch_registers = remote_fetch_registers; |
| 8780 | remote_ops.to_store_registers = remote_store_registers; |
| 8781 | remote_ops.to_prepare_to_store = remote_prepare_to_store; |
| 8782 | remote_ops.deprecated_xfer_memory = remote_xfer_memory; |
| 8783 | remote_ops.to_files_info = remote_files_info; |
| 8784 | remote_ops.to_insert_breakpoint = remote_insert_breakpoint; |
| 8785 | remote_ops.to_remove_breakpoint = remote_remove_breakpoint; |
| 8786 | remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint; |
| 8787 | remote_ops.to_stopped_data_address = remote_stopped_data_address; |
| 8788 | remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources; |
| 8789 | remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint; |
| 8790 | remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint; |
| 8791 | remote_ops.to_insert_watchpoint = remote_insert_watchpoint; |
| 8792 | remote_ops.to_remove_watchpoint = remote_remove_watchpoint; |
| 8793 | remote_ops.to_kill = remote_kill; |
| 8794 | remote_ops.to_load = generic_load; |
| 8795 | remote_ops.to_mourn_inferior = remote_mourn; |
| 8796 | remote_ops.to_thread_alive = remote_thread_alive; |
| 8797 | remote_ops.to_find_new_threads = remote_threads_info; |
| 8798 | remote_ops.to_pid_to_str = remote_pid_to_str; |
| 8799 | remote_ops.to_extra_thread_info = remote_threads_extra_info; |
| 8800 | remote_ops.to_stop = remote_stop; |
| 8801 | remote_ops.to_xfer_partial = remote_xfer_partial; |
| 8802 | remote_ops.to_rcmd = remote_rcmd; |
| 8803 | remote_ops.to_log_command = serial_log_command; |
| 8804 | remote_ops.to_get_thread_local_address = remote_get_thread_local_address; |
| 8805 | remote_ops.to_stratum = process_stratum; |
| 8806 | remote_ops.to_has_all_memory = 1; |
| 8807 | remote_ops.to_has_memory = 1; |
| 8808 | remote_ops.to_has_stack = 1; |
| 8809 | remote_ops.to_has_registers = 1; |
| 8810 | remote_ops.to_has_execution = 1; |
| 8811 | remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ |
| 8812 | remote_ops.to_can_execute_reverse = remote_can_execute_reverse; |
| 8813 | remote_ops.to_magic = OPS_MAGIC; |
| 8814 | remote_ops.to_memory_map = remote_memory_map; |
| 8815 | remote_ops.to_flash_erase = remote_flash_erase; |
| 8816 | remote_ops.to_flash_done = remote_flash_done; |
| 8817 | remote_ops.to_read_description = remote_read_description; |
| 8818 | remote_ops.to_search_memory = remote_search_memory; |
| 8819 | remote_ops.to_can_async_p = remote_can_async_p; |
| 8820 | remote_ops.to_is_async_p = remote_is_async_p; |
| 8821 | remote_ops.to_async = remote_async; |
| 8822 | remote_ops.to_async_mask = remote_async_mask; |
| 8823 | remote_ops.to_terminal_inferior = remote_terminal_inferior; |
| 8824 | remote_ops.to_terminal_ours = remote_terminal_ours; |
| 8825 | remote_ops.to_supports_non_stop = remote_supports_non_stop; |
| 8826 | remote_ops.to_supports_multi_process = remote_supports_multi_process; |
| 8827 | } |
| 8828 | |
| 8829 | /* Set up the extended remote vector by making a copy of the standard |
| 8830 | remote vector and adding to it. */ |
| 8831 | |
| 8832 | static void |
| 8833 | init_extended_remote_ops (void) |
| 8834 | { |
| 8835 | extended_remote_ops = remote_ops; |
| 8836 | |
| 8837 | extended_remote_ops.to_shortname = "extended-remote"; |
| 8838 | extended_remote_ops.to_longname = |
| 8839 | "Extended remote serial target in gdb-specific protocol"; |
| 8840 | extended_remote_ops.to_doc = |
| 8841 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ |
| 8842 | Specify the serial device it is connected to (e.g. /dev/ttya)."; |
| 8843 | extended_remote_ops.to_open = extended_remote_open; |
| 8844 | extended_remote_ops.to_create_inferior = extended_remote_create_inferior; |
| 8845 | extended_remote_ops.to_mourn_inferior = extended_remote_mourn; |
| 8846 | extended_remote_ops.to_detach = extended_remote_detach; |
| 8847 | extended_remote_ops.to_attach = extended_remote_attach; |
| 8848 | extended_remote_ops.to_kill = extended_remote_kill; |
| 8849 | } |
| 8850 | |
| 8851 | static int |
| 8852 | remote_can_async_p (void) |
| 8853 | { |
| 8854 | if (!target_async_permitted) |
| 8855 | /* We only enable async when the user specifically asks for it. */ |
| 8856 | return 0; |
| 8857 | |
| 8858 | /* We're async whenever the serial device is. */ |
| 8859 | return remote_async_mask_value && serial_can_async_p (remote_desc); |
| 8860 | } |
| 8861 | |
| 8862 | static int |
| 8863 | remote_is_async_p (void) |
| 8864 | { |
| 8865 | if (!target_async_permitted) |
| 8866 | /* We only enable async when the user specifically asks for it. */ |
| 8867 | return 0; |
| 8868 | |
| 8869 | /* We're async whenever the serial device is. */ |
| 8870 | return remote_async_mask_value && serial_is_async_p (remote_desc); |
| 8871 | } |
| 8872 | |
| 8873 | /* Pass the SERIAL event on and up to the client. One day this code |
| 8874 | will be able to delay notifying the client of an event until the |
| 8875 | point where an entire packet has been received. */ |
| 8876 | |
| 8877 | static void (*async_client_callback) (enum inferior_event_type event_type, |
| 8878 | void *context); |
| 8879 | static void *async_client_context; |
| 8880 | static serial_event_ftype remote_async_serial_handler; |
| 8881 | |
| 8882 | static void |
| 8883 | remote_async_serial_handler (struct serial *scb, void *context) |
| 8884 | { |
| 8885 | /* Don't propogate error information up to the client. Instead let |
| 8886 | the client find out about the error by querying the target. */ |
| 8887 | async_client_callback (INF_REG_EVENT, async_client_context); |
| 8888 | } |
| 8889 | |
| 8890 | static void |
| 8891 | remote_async_inferior_event_handler (gdb_client_data data) |
| 8892 | { |
| 8893 | inferior_event_handler (INF_REG_EVENT, NULL); |
| 8894 | } |
| 8895 | |
| 8896 | static void |
| 8897 | remote_async_get_pending_events_handler (gdb_client_data data) |
| 8898 | { |
| 8899 | remote_get_pending_stop_replies (); |
| 8900 | } |
| 8901 | |
| 8902 | static void |
| 8903 | remote_async (void (*callback) (enum inferior_event_type event_type, |
| 8904 | void *context), void *context) |
| 8905 | { |
| 8906 | if (remote_async_mask_value == 0) |
| 8907 | internal_error (__FILE__, __LINE__, |
| 8908 | _("Calling remote_async when async is masked")); |
| 8909 | |
| 8910 | if (callback != NULL) |
| 8911 | { |
| 8912 | serial_async (remote_desc, remote_async_serial_handler, NULL); |
| 8913 | async_client_callback = callback; |
| 8914 | async_client_context = context; |
| 8915 | } |
| 8916 | else |
| 8917 | serial_async (remote_desc, NULL, NULL); |
| 8918 | } |
| 8919 | |
| 8920 | static int |
| 8921 | remote_async_mask (int new_mask) |
| 8922 | { |
| 8923 | int curr_mask = remote_async_mask_value; |
| 8924 | remote_async_mask_value = new_mask; |
| 8925 | return curr_mask; |
| 8926 | } |
| 8927 | |
| 8928 | static void |
| 8929 | set_remote_cmd (char *args, int from_tty) |
| 8930 | { |
| 8931 | help_list (remote_set_cmdlist, "set remote ", -1, gdb_stdout); |
| 8932 | } |
| 8933 | |
| 8934 | static void |
| 8935 | show_remote_cmd (char *args, int from_tty) |
| 8936 | { |
| 8937 | /* We can't just use cmd_show_list here, because we want to skip |
| 8938 | the redundant "show remote Z-packet" and the legacy aliases. */ |
| 8939 | struct cleanup *showlist_chain; |
| 8940 | struct cmd_list_element *list = remote_show_cmdlist; |
| 8941 | |
| 8942 | showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist"); |
| 8943 | for (; list != NULL; list = list->next) |
| 8944 | if (strcmp (list->name, "Z-packet") == 0) |
| 8945 | continue; |
| 8946 | else if (list->type == not_set_cmd) |
| 8947 | /* Alias commands are exactly like the original, except they |
| 8948 | don't have the normal type. */ |
| 8949 | continue; |
| 8950 | else |
| 8951 | { |
| 8952 | struct cleanup *option_chain |
| 8953 | = make_cleanup_ui_out_tuple_begin_end (uiout, "option"); |
| 8954 | ui_out_field_string (uiout, "name", list->name); |
| 8955 | ui_out_text (uiout, ": "); |
| 8956 | if (list->type == show_cmd) |
| 8957 | do_setshow_command ((char *) NULL, from_tty, list); |
| 8958 | else |
| 8959 | cmd_func (list, NULL, from_tty); |
| 8960 | /* Close the tuple. */ |
| 8961 | do_cleanups (option_chain); |
| 8962 | } |
| 8963 | |
| 8964 | /* Close the tuple. */ |
| 8965 | do_cleanups (showlist_chain); |
| 8966 | } |
| 8967 | |
| 8968 | |
| 8969 | /* Function to be called whenever a new objfile (shlib) is detected. */ |
| 8970 | static void |
| 8971 | remote_new_objfile (struct objfile *objfile) |
| 8972 | { |
| 8973 | if (remote_desc != 0) /* Have a remote connection. */ |
| 8974 | remote_check_symbols (objfile); |
| 8975 | } |
| 8976 | |
| 8977 | void |
| 8978 | _initialize_remote (void) |
| 8979 | { |
| 8980 | struct remote_state *rs; |
| 8981 | |
| 8982 | /* architecture specific data */ |
| 8983 | remote_gdbarch_data_handle = |
| 8984 | gdbarch_data_register_post_init (init_remote_state); |
| 8985 | remote_g_packet_data_handle = |
| 8986 | gdbarch_data_register_pre_init (remote_g_packet_data_init); |
| 8987 | |
| 8988 | /* Initialize the per-target state. At the moment there is only one |
| 8989 | of these, not one per target. Only one target is active at a |
| 8990 | time. The default buffer size is unimportant; it will be expanded |
| 8991 | whenever a larger buffer is needed. */ |
| 8992 | rs = get_remote_state_raw (); |
| 8993 | rs->buf_size = 400; |
| 8994 | rs->buf = xmalloc (rs->buf_size); |
| 8995 | |
| 8996 | init_remote_ops (); |
| 8997 | add_target (&remote_ops); |
| 8998 | |
| 8999 | init_extended_remote_ops (); |
| 9000 | add_target (&extended_remote_ops); |
| 9001 | |
| 9002 | /* Hook into new objfile notification. */ |
| 9003 | observer_attach_new_objfile (remote_new_objfile); |
| 9004 | |
| 9005 | /* Set up signal handlers. */ |
| 9006 | sigint_remote_token = |
| 9007 | create_async_signal_handler (async_remote_interrupt, NULL); |
| 9008 | sigint_remote_twice_token = |
| 9009 | create_async_signal_handler (inferior_event_handler_wrapper, NULL); |
| 9010 | |
| 9011 | #if 0 |
| 9012 | init_remote_threadtests (); |
| 9013 | #endif |
| 9014 | |
| 9015 | /* set/show remote ... */ |
| 9016 | |
| 9017 | add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\ |
| 9018 | Remote protocol specific variables\n\ |
| 9019 | Configure various remote-protocol specific variables such as\n\ |
| 9020 | the packets being used"), |
| 9021 | &remote_set_cmdlist, "set remote ", |
| 9022 | 0 /* allow-unknown */, &setlist); |
| 9023 | add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\ |
| 9024 | Remote protocol specific variables\n\ |
| 9025 | Configure various remote-protocol specific variables such as\n\ |
| 9026 | the packets being used"), |
| 9027 | &remote_show_cmdlist, "show remote ", |
| 9028 | 0 /* allow-unknown */, &showlist); |
| 9029 | |
| 9030 | add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\ |
| 9031 | Compare section data on target to the exec file.\n\ |
| 9032 | Argument is a single section name (default: all loaded sections)."), |
| 9033 | &cmdlist); |
| 9034 | |
| 9035 | add_cmd ("packet", class_maintenance, packet_command, _("\ |
| 9036 | Send an arbitrary packet to a remote target.\n\ |
| 9037 | maintenance packet TEXT\n\ |
| 9038 | If GDB is talking to an inferior via the GDB serial protocol, then\n\ |
| 9039 | this command sends the string TEXT to the inferior, and displays the\n\ |
| 9040 | response packet. GDB supplies the initial `$' character, and the\n\ |
| 9041 | terminating `#' character and checksum."), |
| 9042 | &maintenancelist); |
| 9043 | |
| 9044 | add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\ |
| 9045 | Set whether to send break if interrupted."), _("\ |
| 9046 | Show whether to send break if interrupted."), _("\ |
| 9047 | If set, a break, instead of a cntrl-c, is sent to the remote target."), |
| 9048 | NULL, NULL, /* FIXME: i18n: Whether to send break if interrupted is %s. */ |
| 9049 | &setlist, &showlist); |
| 9050 | |
| 9051 | /* Install commands for configuring memory read/write packets. */ |
| 9052 | |
| 9053 | add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\ |
| 9054 | Set the maximum number of bytes per memory write packet (deprecated)."), |
| 9055 | &setlist); |
| 9056 | add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\ |
| 9057 | Show the maximum number of bytes per memory write packet (deprecated)."), |
| 9058 | &showlist); |
| 9059 | add_cmd ("memory-write-packet-size", no_class, |
| 9060 | set_memory_write_packet_size, _("\ |
| 9061 | Set the maximum number of bytes per memory-write packet.\n\ |
| 9062 | Specify the number of bytes in a packet or 0 (zero) for the\n\ |
| 9063 | default packet size. The actual limit is further reduced\n\ |
| 9064 | dependent on the target. Specify ``fixed'' to disable the\n\ |
| 9065 | further restriction and ``limit'' to enable that restriction."), |
| 9066 | &remote_set_cmdlist); |
| 9067 | add_cmd ("memory-read-packet-size", no_class, |
| 9068 | set_memory_read_packet_size, _("\ |
| 9069 | Set the maximum number of bytes per memory-read packet.\n\ |
| 9070 | Specify the number of bytes in a packet or 0 (zero) for the\n\ |
| 9071 | default packet size. The actual limit is further reduced\n\ |
| 9072 | dependent on the target. Specify ``fixed'' to disable the\n\ |
| 9073 | further restriction and ``limit'' to enable that restriction."), |
| 9074 | &remote_set_cmdlist); |
| 9075 | add_cmd ("memory-write-packet-size", no_class, |
| 9076 | show_memory_write_packet_size, |
| 9077 | _("Show the maximum number of bytes per memory-write packet."), |
| 9078 | &remote_show_cmdlist); |
| 9079 | add_cmd ("memory-read-packet-size", no_class, |
| 9080 | show_memory_read_packet_size, |
| 9081 | _("Show the maximum number of bytes per memory-read packet."), |
| 9082 | &remote_show_cmdlist); |
| 9083 | |
| 9084 | add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class, |
| 9085 | &remote_hw_watchpoint_limit, _("\ |
| 9086 | Set the maximum number of target hardware watchpoints."), _("\ |
| 9087 | Show the maximum number of target hardware watchpoints."), _("\ |
| 9088 | Specify a negative limit for unlimited."), |
| 9089 | NULL, NULL, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */ |
| 9090 | &remote_set_cmdlist, &remote_show_cmdlist); |
| 9091 | add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class, |
| 9092 | &remote_hw_breakpoint_limit, _("\ |
| 9093 | Set the maximum number of target hardware breakpoints."), _("\ |
| 9094 | Show the maximum number of target hardware breakpoints."), _("\ |
| 9095 | Specify a negative limit for unlimited."), |
| 9096 | NULL, NULL, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */ |
| 9097 | &remote_set_cmdlist, &remote_show_cmdlist); |
| 9098 | |
| 9099 | add_setshow_integer_cmd ("remoteaddresssize", class_obscure, |
| 9100 | &remote_address_size, _("\ |
| 9101 | Set the maximum size of the address (in bits) in a memory packet."), _("\ |
| 9102 | Show the maximum size of the address (in bits) in a memory packet."), NULL, |
| 9103 | NULL, |
| 9104 | NULL, /* FIXME: i18n: */ |
| 9105 | &setlist, &showlist); |
| 9106 | |
| 9107 | add_packet_config_cmd (&remote_protocol_packets[PACKET_X], |
| 9108 | "X", "binary-download", 1); |
| 9109 | |
| 9110 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont], |
| 9111 | "vCont", "verbose-resume", 0); |
| 9112 | |
| 9113 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals], |
| 9114 | "QPassSignals", "pass-signals", 0); |
| 9115 | |
| 9116 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol], |
| 9117 | "qSymbol", "symbol-lookup", 0); |
| 9118 | |
| 9119 | add_packet_config_cmd (&remote_protocol_packets[PACKET_P], |
| 9120 | "P", "set-register", 1); |
| 9121 | |
| 9122 | add_packet_config_cmd (&remote_protocol_packets[PACKET_p], |
| 9123 | "p", "fetch-register", 1); |
| 9124 | |
| 9125 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0], |
| 9126 | "Z0", "software-breakpoint", 0); |
| 9127 | |
| 9128 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1], |
| 9129 | "Z1", "hardware-breakpoint", 0); |
| 9130 | |
| 9131 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2], |
| 9132 | "Z2", "write-watchpoint", 0); |
| 9133 | |
| 9134 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3], |
| 9135 | "Z3", "read-watchpoint", 0); |
| 9136 | |
| 9137 | add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4], |
| 9138 | "Z4", "access-watchpoint", 0); |
| 9139 | |
| 9140 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv], |
| 9141 | "qXfer:auxv:read", "read-aux-vector", 0); |
| 9142 | |
| 9143 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features], |
| 9144 | "qXfer:features:read", "target-features", 0); |
| 9145 | |
| 9146 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries], |
| 9147 | "qXfer:libraries:read", "library-info", 0); |
| 9148 | |
| 9149 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map], |
| 9150 | "qXfer:memory-map:read", "memory-map", 0); |
| 9151 | |
| 9152 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read], |
| 9153 | "qXfer:spu:read", "read-spu-object", 0); |
| 9154 | |
| 9155 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write], |
| 9156 | "qXfer:spu:write", "write-spu-object", 0); |
| 9157 | |
| 9158 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata], |
| 9159 | "qXfer:osdata:read", "osdata", 0); |
| 9160 | |
| 9161 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read], |
| 9162 | "qXfer:siginfo:read", "read-siginfo-object", 0); |
| 9163 | |
| 9164 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write], |
| 9165 | "qXfer:siginfo:write", "write-siginfo-object", 0); |
| 9166 | |
| 9167 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr], |
| 9168 | "qGetTLSAddr", "get-thread-local-storage-address", |
| 9169 | 0); |
| 9170 | |
| 9171 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported], |
| 9172 | "qSupported", "supported-packets", 0); |
| 9173 | |
| 9174 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory], |
| 9175 | "qSearch:memory", "search-memory", 0); |
| 9176 | |
| 9177 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open], |
| 9178 | "vFile:open", "hostio-open", 0); |
| 9179 | |
| 9180 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread], |
| 9181 | "vFile:pread", "hostio-pread", 0); |
| 9182 | |
| 9183 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite], |
| 9184 | "vFile:pwrite", "hostio-pwrite", 0); |
| 9185 | |
| 9186 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close], |
| 9187 | "vFile:close", "hostio-close", 0); |
| 9188 | |
| 9189 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink], |
| 9190 | "vFile:unlink", "hostio-unlink", 0); |
| 9191 | |
| 9192 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach], |
| 9193 | "vAttach", "attach", 0); |
| 9194 | |
| 9195 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun], |
| 9196 | "vRun", "run", 0); |
| 9197 | |
| 9198 | add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode], |
| 9199 | "QStartNoAckMode", "noack", 0); |
| 9200 | |
| 9201 | add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill], |
| 9202 | "vKill", "kill", 0); |
| 9203 | |
| 9204 | add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached], |
| 9205 | "qAttached", "query-attached", 0); |
| 9206 | |
| 9207 | /* Keep the old ``set remote Z-packet ...'' working. Each individual |
| 9208 | Z sub-packet has its own set and show commands, but users may |
| 9209 | have sets to this variable in their .gdbinit files (or in their |
| 9210 | documentation). */ |
| 9211 | add_setshow_auto_boolean_cmd ("Z-packet", class_obscure, |
| 9212 | &remote_Z_packet_detect, _("\ |
| 9213 | Set use of remote protocol `Z' packets"), _("\ |
| 9214 | Show use of remote protocol `Z' packets "), _("\ |
| 9215 | When set, GDB will attempt to use the remote breakpoint and watchpoint\n\ |
| 9216 | packets."), |
| 9217 | set_remote_protocol_Z_packet_cmd, |
| 9218 | show_remote_protocol_Z_packet_cmd, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */ |
| 9219 | &remote_set_cmdlist, &remote_show_cmdlist); |
| 9220 | |
| 9221 | add_prefix_cmd ("remote", class_files, remote_command, _("\ |
| 9222 | Manipulate files on the remote system\n\ |
| 9223 | Transfer files to and from the remote target system."), |
| 9224 | &remote_cmdlist, "remote ", |
| 9225 | 0 /* allow-unknown */, &cmdlist); |
| 9226 | |
| 9227 | add_cmd ("put", class_files, remote_put_command, |
| 9228 | _("Copy a local file to the remote system."), |
| 9229 | &remote_cmdlist); |
| 9230 | |
| 9231 | add_cmd ("get", class_files, remote_get_command, |
| 9232 | _("Copy a remote file to the local system."), |
| 9233 | &remote_cmdlist); |
| 9234 | |
| 9235 | add_cmd ("delete", class_files, remote_delete_command, |
| 9236 | _("Delete a remote file."), |
| 9237 | &remote_cmdlist); |
| 9238 | |
| 9239 | remote_exec_file = xstrdup (""); |
| 9240 | add_setshow_string_noescape_cmd ("exec-file", class_files, |
| 9241 | &remote_exec_file, _("\ |
| 9242 | Set the remote pathname for \"run\""), _("\ |
| 9243 | Show the remote pathname for \"run\""), NULL, NULL, NULL, |
| 9244 | &remote_set_cmdlist, &remote_show_cmdlist); |
| 9245 | |
| 9246 | /* Eventually initialize fileio. See fileio.c */ |
| 9247 | initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist); |
| 9248 | |
| 9249 | /* Take advantage of the fact that the LWP field is not used, to tag |
| 9250 | special ptids with it set to != 0. */ |
| 9251 | magic_null_ptid = ptid_build (42000, 1, -1); |
| 9252 | not_sent_ptid = ptid_build (42000, 1, -2); |
| 9253 | any_thread_ptid = ptid_build (42000, 1, 0); |
| 9254 | } |