| 1 | /* Remote debugging interface for Array Tech RAID controller.. |
| 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 3 | 2000, 2001 Free Software Foundation, Inc. |
| 4 | Contributed by Cygnus Support. Written by Rob Savoye for Cygnus. |
| 5 | |
| 6 | This module talks to a debug monitor called 'MONITOR', which |
| 7 | We communicate with MONITOR via either a direct serial line, or a TCP |
| 8 | (or possibly TELNET) stream to a terminal multiplexor, |
| 9 | which in turn talks to the target board. |
| 10 | |
| 11 | This file is part of GDB. |
| 12 | |
| 13 | This program is free software; you can redistribute it and/or modify |
| 14 | it under the terms of the GNU General Public License as published by |
| 15 | the Free Software Foundation; either version 2 of the License, or |
| 16 | (at your option) any later version. |
| 17 | |
| 18 | This program is distributed in the hope that it will be useful, |
| 19 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | GNU General Public License for more details. |
| 22 | |
| 23 | You should have received a copy of the GNU General Public License |
| 24 | along with this program; if not, write to the Free Software |
| 25 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 26 | Boston, MA 02111-1307, USA. |
| 27 | */ |
| 28 | |
| 29 | #include "defs.h" |
| 30 | #include "gdbcore.h" |
| 31 | #include "target.h" |
| 32 | #include <ctype.h> |
| 33 | #include <sys/types.h> |
| 34 | #include "gdb_string.h" |
| 35 | #include "command.h" |
| 36 | #include "serial.h" |
| 37 | #include "monitor.h" |
| 38 | #include "remote-utils.h" |
| 39 | #include "inferior.h" |
| 40 | #include "version.h" |
| 41 | #include "regcache.h" |
| 42 | |
| 43 | extern int baud_rate; |
| 44 | |
| 45 | #define ARRAY_PROMPT ">> " |
| 46 | |
| 47 | static void debuglogs (int, char *, ...); |
| 48 | static void array_open (); |
| 49 | static void array_close (); |
| 50 | static void array_detach (); |
| 51 | static void array_attach (); |
| 52 | static void array_resume (ptid_t ptid, int step, enum target_signal sig); |
| 53 | static void array_fetch_register (); |
| 54 | static void array_store_register (); |
| 55 | static void array_fetch_registers (); |
| 56 | static void array_store_registers (); |
| 57 | static void array_prepare_to_store (); |
| 58 | static void array_files_info (); |
| 59 | static void array_kill (); |
| 60 | static void array_create_inferior (); |
| 61 | static void array_mourn_inferior (); |
| 62 | static void make_gdb_packet (); |
| 63 | static int array_xfer_memory (); |
| 64 | static ptid_t array_wait (ptid_t ptid, |
| 65 | struct target_waitstatus *status); |
| 66 | static int array_insert_breakpoint (); |
| 67 | static int array_remove_breakpoint (); |
| 68 | static int tohex (); |
| 69 | static int to_hex (); |
| 70 | static int from_hex (); |
| 71 | static int array_send_packet (); |
| 72 | static int array_get_packet (); |
| 73 | static unsigned long ascii2hexword (); |
| 74 | static void hexword2ascii (); |
| 75 | |
| 76 | #define LOG_FILE "monitor.log" |
| 77 | #if defined (LOG_FILE) |
| 78 | FILE *log_file; |
| 79 | #endif |
| 80 | |
| 81 | static int timeout = 30; |
| 82 | /* Having this larger than 400 causes us to be incompatible with m68k-stub.c |
| 83 | and i386-stub.c. Normally, no one would notice because it only matters |
| 84 | for writing large chunks of memory (e.g. in downloads). Also, this needs |
| 85 | to be more than 400 if required to hold the registers (see below, where |
| 86 | we round it up based on REGISTER_BYTES). */ |
| 87 | #define PBUFSIZ 400 |
| 88 | |
| 89 | /* |
| 90 | * Descriptor for I/O to remote machine. Initialize it to NULL so that |
| 91 | * array_open knows that we don't have a file open when the program starts. |
| 92 | */ |
| 93 | struct serial *array_desc = NULL; |
| 94 | |
| 95 | /* |
| 96 | * this array of registers need to match the indexes used by GDB. The |
| 97 | * whole reason this exists is cause the various ROM monitors use |
| 98 | * different strings than GDB does, and doesn't support all the |
| 99 | * registers either. So, typing "info reg sp" becomes a "r30". |
| 100 | */ |
| 101 | extern char *tmp_mips_processor_type; |
| 102 | extern int mips_set_processor_type (); |
| 103 | |
| 104 | static struct target_ops array_ops; |
| 105 | |
| 106 | static void |
| 107 | init_array_ops (void) |
| 108 | { |
| 109 | array_ops.to_shortname = "array"; |
| 110 | array_ops.to_longname = |
| 111 | "Debug using the standard GDB remote protocol for the Array Tech target.", |
| 112 | array_ops.to_doc = |
| 113 | "Debug using the standard GDB remote protocol for the Array Tech target.\n\ |
| 114 | Specify the serial device it is connected to (e.g. /dev/ttya)."; |
| 115 | array_ops.to_open = array_open; |
| 116 | array_ops.to_close = array_close; |
| 117 | array_ops.to_attach = NULL; |
| 118 | array_ops.to_post_attach = NULL; |
| 119 | array_ops.to_require_attach = NULL; |
| 120 | array_ops.to_detach = array_detach; |
| 121 | array_ops.to_require_detach = NULL; |
| 122 | array_ops.to_resume = array_resume; |
| 123 | array_ops.to_wait = array_wait; |
| 124 | array_ops.to_post_wait = NULL; |
| 125 | array_ops.to_fetch_registers = array_fetch_registers; |
| 126 | array_ops.to_store_registers = array_store_registers; |
| 127 | array_ops.to_prepare_to_store = array_prepare_to_store; |
| 128 | array_ops.to_xfer_memory = array_xfer_memory; |
| 129 | array_ops.to_files_info = array_files_info; |
| 130 | array_ops.to_insert_breakpoint = array_insert_breakpoint; |
| 131 | array_ops.to_remove_breakpoint = array_remove_breakpoint; |
| 132 | array_ops.to_terminal_init = 0; |
| 133 | array_ops.to_terminal_inferior = 0; |
| 134 | array_ops.to_terminal_ours_for_output = 0; |
| 135 | array_ops.to_terminal_ours = 0; |
| 136 | array_ops.to_terminal_info = 0; |
| 137 | array_ops.to_kill = array_kill; |
| 138 | array_ops.to_load = 0; |
| 139 | array_ops.to_lookup_symbol = 0; |
| 140 | array_ops.to_create_inferior = array_create_inferior; |
| 141 | array_ops.to_post_startup_inferior = NULL; |
| 142 | array_ops.to_acknowledge_created_inferior = NULL; |
| 143 | array_ops.to_clone_and_follow_inferior = NULL; |
| 144 | array_ops.to_post_follow_inferior_by_clone = NULL; |
| 145 | array_ops.to_insert_fork_catchpoint = NULL; |
| 146 | array_ops.to_remove_fork_catchpoint = NULL; |
| 147 | array_ops.to_insert_vfork_catchpoint = NULL; |
| 148 | array_ops.to_remove_vfork_catchpoint = NULL; |
| 149 | array_ops.to_has_forked = NULL; |
| 150 | array_ops.to_has_vforked = NULL; |
| 151 | array_ops.to_can_follow_vfork_prior_to_exec = NULL; |
| 152 | array_ops.to_post_follow_vfork = NULL; |
| 153 | array_ops.to_insert_exec_catchpoint = NULL; |
| 154 | array_ops.to_remove_exec_catchpoint = NULL; |
| 155 | array_ops.to_has_execd = NULL; |
| 156 | array_ops.to_reported_exec_events_per_exec_call = NULL; |
| 157 | array_ops.to_has_exited = NULL; |
| 158 | array_ops.to_mourn_inferior = array_mourn_inferior; |
| 159 | array_ops.to_can_run = 0; |
| 160 | array_ops.to_notice_signals = 0; |
| 161 | array_ops.to_thread_alive = 0; |
| 162 | array_ops.to_stop = 0; |
| 163 | array_ops.to_pid_to_exec_file = NULL; |
| 164 | array_ops.to_stratum = process_stratum; |
| 165 | array_ops.DONT_USE = 0; |
| 166 | array_ops.to_has_all_memory = 1; |
| 167 | array_ops.to_has_memory = 1; |
| 168 | array_ops.to_has_stack = 1; |
| 169 | array_ops.to_has_registers = 1; |
| 170 | array_ops.to_has_execution = 1; |
| 171 | array_ops.to_sections = 0; |
| 172 | array_ops.to_sections_end = 0; |
| 173 | array_ops.to_magic = OPS_MAGIC; |
| 174 | }; |
| 175 | |
| 176 | /* |
| 177 | * printf_monitor -- send data to monitor. Works just like printf. |
| 178 | */ |
| 179 | static void |
| 180 | printf_monitor (char *pattern,...) |
| 181 | { |
| 182 | va_list args; |
| 183 | char buf[PBUFSIZ]; |
| 184 | int i; |
| 185 | |
| 186 | va_start (args, pattern); |
| 187 | |
| 188 | vsprintf (buf, pattern, args); |
| 189 | |
| 190 | debuglogs (1, "printf_monitor(), Sending: \"%s\".", buf); |
| 191 | |
| 192 | if (strlen (buf) > PBUFSIZ) |
| 193 | error ("printf_monitor(): string too long"); |
| 194 | if (serial_write (array_desc, buf, strlen (buf))) |
| 195 | fprintf (stderr, "serial_write failed: %s\n", safe_strerror (errno)); |
| 196 | } |
| 197 | /* |
| 198 | * write_monitor -- send raw data to monitor. |
| 199 | */ |
| 200 | static void |
| 201 | write_monitor (char data[], int len) |
| 202 | { |
| 203 | if (serial_write (array_desc, data, len)) |
| 204 | fprintf (stderr, "serial_write failed: %s\n", safe_strerror (errno)); |
| 205 | |
| 206 | *(data + len + 1) = '\0'; |
| 207 | debuglogs (1, "write_monitor(), Sending: \"%s\".", data); |
| 208 | |
| 209 | } |
| 210 | |
| 211 | /* |
| 212 | * debuglogs -- deal with debugging info to multiple sources. This takes |
| 213 | * two real args, the first one is the level to be compared against |
| 214 | * the sr_get_debug() value, the second arg is a printf buffer and args |
| 215 | * to be formatted and printed. A CR is added after each string is printed. |
| 216 | */ |
| 217 | static void |
| 218 | debuglogs (int level, char *pattern,...) |
| 219 | { |
| 220 | va_list args; |
| 221 | char *p; |
| 222 | unsigned char buf[PBUFSIZ]; |
| 223 | char newbuf[PBUFSIZ]; |
| 224 | int i; |
| 225 | |
| 226 | va_start (args, pattern); |
| 227 | |
| 228 | if ((level < 0) || (level > 100)) |
| 229 | { |
| 230 | error ("Bad argument passed to debuglogs(), needs debug level"); |
| 231 | return; |
| 232 | } |
| 233 | |
| 234 | vsprintf (buf, pattern, args); /* format the string */ |
| 235 | |
| 236 | /* convert some characters so it'll look right in the log */ |
| 237 | p = newbuf; |
| 238 | for (i = 0; buf[i] != '\0'; i++) |
| 239 | { |
| 240 | if (i > PBUFSIZ) |
| 241 | error ("Debug message too long"); |
| 242 | switch (buf[i]) |
| 243 | { |
| 244 | case '\n': /* newlines */ |
| 245 | *p++ = '\\'; |
| 246 | *p++ = 'n'; |
| 247 | continue; |
| 248 | case '\r': /* carriage returns */ |
| 249 | *p++ = '\\'; |
| 250 | *p++ = 'r'; |
| 251 | continue; |
| 252 | case '\033': /* escape */ |
| 253 | *p++ = '\\'; |
| 254 | *p++ = 'e'; |
| 255 | continue; |
| 256 | case '\t': /* tab */ |
| 257 | *p++ = '\\'; |
| 258 | *p++ = 't'; |
| 259 | continue; |
| 260 | case '\b': /* backspace */ |
| 261 | *p++ = '\\'; |
| 262 | *p++ = 'b'; |
| 263 | continue; |
| 264 | default: /* no change */ |
| 265 | *p++ = buf[i]; |
| 266 | } |
| 267 | |
| 268 | if (buf[i] < 26) |
| 269 | { /* modify control characters */ |
| 270 | *p++ = '^'; |
| 271 | *p++ = buf[i] + 'A'; |
| 272 | continue; |
| 273 | } |
| 274 | if (buf[i] >= 128) |
| 275 | { /* modify control characters */ |
| 276 | *p++ = '!'; |
| 277 | *p++ = buf[i] + 'A'; |
| 278 | continue; |
| 279 | } |
| 280 | } |
| 281 | *p = '\0'; /* terminate the string */ |
| 282 | |
| 283 | if (sr_get_debug () > level) |
| 284 | printf_unfiltered ("%s\n", newbuf); |
| 285 | |
| 286 | #ifdef LOG_FILE /* write to the monitor log */ |
| 287 | if (log_file != 0x0) |
| 288 | { |
| 289 | fputs (newbuf, log_file); |
| 290 | fputc ('\n', log_file); |
| 291 | fflush (log_file); |
| 292 | } |
| 293 | #endif |
| 294 | } |
| 295 | |
| 296 | /* readchar -- read a character from the remote system, doing all the fancy |
| 297 | * timeout stuff. |
| 298 | */ |
| 299 | static int |
| 300 | readchar (int timeout) |
| 301 | { |
| 302 | int c; |
| 303 | |
| 304 | c = serial_readchar (array_desc, abs (timeout)); |
| 305 | |
| 306 | if (sr_get_debug () > 5) |
| 307 | { |
| 308 | putchar (c & 0x7f); |
| 309 | debuglogs (5, "readchar: timeout = %d\n", timeout); |
| 310 | } |
| 311 | |
| 312 | #ifdef LOG_FILE |
| 313 | if (isascii (c)) |
| 314 | putc (c & 0x7f, log_file); |
| 315 | #endif |
| 316 | |
| 317 | if (c >= 0) |
| 318 | return c & 0x7f; |
| 319 | |
| 320 | if (c == SERIAL_TIMEOUT) |
| 321 | { |
| 322 | if (timeout <= 0) |
| 323 | return c; /* Polls shouldn't generate timeout errors */ |
| 324 | error ("Timeout reading from remote system."); |
| 325 | #ifdef LOG_FILE |
| 326 | fputs ("ERROR: Timeout reading from remote system", log_file); |
| 327 | #endif |
| 328 | } |
| 329 | perror_with_name ("readchar"); |
| 330 | } |
| 331 | |
| 332 | /* |
| 333 | * expect -- scan input from the remote system, until STRING is found. |
| 334 | * If DISCARD is non-zero, then discard non-matching input, else print |
| 335 | * it out. Let the user break out immediately. |
| 336 | */ |
| 337 | static void |
| 338 | expect (char *string, int discard) |
| 339 | { |
| 340 | char *p = string; |
| 341 | int c; |
| 342 | |
| 343 | |
| 344 | debuglogs (1, "Expecting \"%s\".", string); |
| 345 | |
| 346 | immediate_quit++; |
| 347 | while (1) |
| 348 | { |
| 349 | c = readchar (timeout); |
| 350 | if (!isascii (c)) |
| 351 | continue; |
| 352 | if (c == *p++) |
| 353 | { |
| 354 | if (*p == '\0') |
| 355 | { |
| 356 | immediate_quit--; |
| 357 | debuglogs (4, "Matched"); |
| 358 | return; |
| 359 | } |
| 360 | } |
| 361 | else |
| 362 | { |
| 363 | if (!discard) |
| 364 | { |
| 365 | fputc_unfiltered (c, gdb_stdout); |
| 366 | } |
| 367 | p = string; |
| 368 | } |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | /* Keep discarding input until we see the MONITOR array_cmds->prompt. |
| 373 | |
| 374 | The convention for dealing with the expect_prompt is that you |
| 375 | o give your command |
| 376 | o *then* wait for the expect_prompt. |
| 377 | |
| 378 | Thus the last thing that a procedure does with the serial line |
| 379 | will be an expect_prompt(). Exception: array_resume does not |
| 380 | wait for the expect_prompt, because the terminal is being handed over |
| 381 | to the inferior. However, the next thing which happens after that |
| 382 | is a array_wait which does wait for the expect_prompt. |
| 383 | Note that this includes abnormal exit, e.g. error(). This is |
| 384 | necessary to prevent getting into states from which we can't |
| 385 | recover. */ |
| 386 | static void |
| 387 | expect_prompt (int discard) |
| 388 | { |
| 389 | expect (ARRAY_PROMPT, discard); |
| 390 | } |
| 391 | |
| 392 | /* |
| 393 | * junk -- ignore junk characters. Returns a 1 if junk, 0 otherwise |
| 394 | */ |
| 395 | static int |
| 396 | junk (char ch) |
| 397 | { |
| 398 | switch (ch) |
| 399 | { |
| 400 | case '\0': |
| 401 | case ' ': |
| 402 | case '-': |
| 403 | case '\t': |
| 404 | case '\r': |
| 405 | case '\n': |
| 406 | if (sr_get_debug () > 5) |
| 407 | debuglogs (5, "Ignoring \'%c\'.", ch); |
| 408 | return 1; |
| 409 | default: |
| 410 | if (sr_get_debug () > 5) |
| 411 | debuglogs (5, "Accepting \'%c\'.", ch); |
| 412 | return 0; |
| 413 | } |
| 414 | } |
| 415 | |
| 416 | /* |
| 417 | * get_hex_digit -- Get a hex digit from the remote system & return its value. |
| 418 | * If ignore is nonzero, ignore spaces, newline & tabs. |
| 419 | */ |
| 420 | static int |
| 421 | get_hex_digit (int ignore) |
| 422 | { |
| 423 | static int ch; |
| 424 | while (1) |
| 425 | { |
| 426 | ch = readchar (timeout); |
| 427 | if (junk (ch)) |
| 428 | continue; |
| 429 | if (sr_get_debug () > 4) |
| 430 | { |
| 431 | debuglogs (4, "get_hex_digit() got a 0x%x(%c)", ch, ch); |
| 432 | } |
| 433 | else |
| 434 | { |
| 435 | #ifdef LOG_FILE /* write to the monitor log */ |
| 436 | if (log_file != 0x0) |
| 437 | { |
| 438 | fputs ("get_hex_digit() got a 0x", log_file); |
| 439 | fputc (ch, log_file); |
| 440 | fputc ('\n', log_file); |
| 441 | fflush (log_file); |
| 442 | } |
| 443 | #endif |
| 444 | } |
| 445 | |
| 446 | if (ch >= '0' && ch <= '9') |
| 447 | return ch - '0'; |
| 448 | else if (ch >= 'A' && ch <= 'F') |
| 449 | return ch - 'A' + 10; |
| 450 | else if (ch >= 'a' && ch <= 'f') |
| 451 | return ch - 'a' + 10; |
| 452 | else if (ch == ' ' && ignore) |
| 453 | ; |
| 454 | else |
| 455 | { |
| 456 | expect_prompt (1); |
| 457 | debuglogs (4, "Invalid hex digit from remote system. (0x%x)", ch); |
| 458 | error ("Invalid hex digit from remote system. (0x%x)", ch); |
| 459 | } |
| 460 | } |
| 461 | } |
| 462 | |
| 463 | /* get_hex_byte -- Get a byte from monitor and put it in *BYT. |
| 464 | * Accept any number leading spaces. |
| 465 | */ |
| 466 | static void |
| 467 | get_hex_byte (char *byt) |
| 468 | { |
| 469 | int val; |
| 470 | |
| 471 | val = get_hex_digit (1) << 4; |
| 472 | debuglogs (4, "get_hex_byte() -- Read first nibble 0x%x", val); |
| 473 | |
| 474 | val |= get_hex_digit (0); |
| 475 | debuglogs (4, "get_hex_byte() -- Read second nibble 0x%x", val); |
| 476 | *byt = val; |
| 477 | |
| 478 | debuglogs (4, "get_hex_byte() -- Read a 0x%x", val); |
| 479 | } |
| 480 | |
| 481 | /* |
| 482 | * get_hex_word -- Get N 32-bit words from remote, each preceded by a space, |
| 483 | * and put them in registers starting at REGNO. |
| 484 | */ |
| 485 | static int |
| 486 | get_hex_word (void) |
| 487 | { |
| 488 | long val, newval; |
| 489 | int i; |
| 490 | |
| 491 | val = 0; |
| 492 | |
| 493 | for (i = 0; i < 8; i++) |
| 494 | val = (val << 4) + get_hex_digit (i == 0); |
| 495 | |
| 496 | debuglogs (4, "get_hex_word() got a 0x%x.", val); |
| 497 | |
| 498 | return val; |
| 499 | } |
| 500 | |
| 501 | /* This is called not only when we first attach, but also when the |
| 502 | user types "run" after having attached. */ |
| 503 | static void |
| 504 | array_create_inferior (char *execfile, char *args, char **env) |
| 505 | { |
| 506 | int entry_pt; |
| 507 | |
| 508 | if (args && *args) |
| 509 | error ("Can't pass arguments to remote MONITOR process"); |
| 510 | |
| 511 | if (execfile == 0 || exec_bfd == 0) |
| 512 | error ("No executable file specified"); |
| 513 | |
| 514 | entry_pt = (int) bfd_get_start_address (exec_bfd); |
| 515 | |
| 516 | /* The "process" (board) is already stopped awaiting our commands, and |
| 517 | the program is already downloaded. We just set its PC and go. */ |
| 518 | |
| 519 | clear_proceed_status (); |
| 520 | |
| 521 | /* Tell wait_for_inferior that we've started a new process. */ |
| 522 | init_wait_for_inferior (); |
| 523 | |
| 524 | /* Set up the "saved terminal modes" of the inferior |
| 525 | based on what modes we are starting it with. */ |
| 526 | target_terminal_init (); |
| 527 | |
| 528 | /* Install inferior's terminal modes. */ |
| 529 | target_terminal_inferior (); |
| 530 | |
| 531 | /* insert_step_breakpoint (); FIXME, do we need this? */ |
| 532 | |
| 533 | /* Let 'er rip... */ |
| 534 | proceed ((CORE_ADDR) entry_pt, TARGET_SIGNAL_DEFAULT, 0); |
| 535 | } |
| 536 | |
| 537 | /* |
| 538 | * array_open -- open a connection to a remote debugger. |
| 539 | * NAME is the filename used for communication. |
| 540 | */ |
| 541 | static int baudrate = 9600; |
| 542 | static char dev_name[100]; |
| 543 | |
| 544 | static void |
| 545 | array_open (char *args, char *name, int from_tty) |
| 546 | { |
| 547 | char packet[PBUFSIZ]; |
| 548 | |
| 549 | if (args == NULL) |
| 550 | error ("Use `target %s DEVICE-NAME' to use a serial port, or \n\ |
| 551 | `target %s HOST-NAME:PORT-NUMBER' to use a network connection.", name, name); |
| 552 | |
| 553 | /* if (is_open) */ |
| 554 | array_close (0); |
| 555 | |
| 556 | target_preopen (from_tty); |
| 557 | unpush_target (&array_ops); |
| 558 | |
| 559 | tmp_mips_processor_type = "lsi33k"; /* change the default from r3051 */ |
| 560 | mips_set_processor_type_command ("lsi33k", 0); |
| 561 | |
| 562 | strcpy (dev_name, args); |
| 563 | array_desc = serial_open (dev_name); |
| 564 | |
| 565 | if (array_desc == NULL) |
| 566 | perror_with_name (dev_name); |
| 567 | |
| 568 | if (baud_rate != -1) |
| 569 | { |
| 570 | if (serial_setbaudrate (array_desc, baud_rate)) |
| 571 | { |
| 572 | serial_close (array_desc); |
| 573 | perror_with_name (name); |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | serial_raw (array_desc); |
| 578 | |
| 579 | #if defined (LOG_FILE) |
| 580 | log_file = fopen (LOG_FILE, "w"); |
| 581 | if (log_file == NULL) |
| 582 | perror_with_name (LOG_FILE); |
| 583 | fprintf (log_file, "GDB %s (%s", version, host_name); |
| 584 | fprintf (log_file, " --target %s)\n", array_ops.to_shortname); |
| 585 | fprintf (log_file, "Remote target %s connected to %s\n\n", array_ops.to_shortname, dev_name); |
| 586 | #endif |
| 587 | |
| 588 | /* see if the target is alive. For a ROM monitor, we can just try to force the |
| 589 | expect_prompt to print a few times. For the GDB remote protocol, the application |
| 590 | being debugged is sitting at a breakpoint and waiting for GDB to initialize |
| 591 | the connection. We force it to give us an empty packet to see if it's alive. |
| 592 | */ |
| 593 | debuglogs (3, "Trying to ACK the target's debug stub"); |
| 594 | /* unless your are on the new hardware, the old board won't initialize |
| 595 | because the '@' doesn't flush output like it does on the new ROMS. |
| 596 | */ |
| 597 | printf_monitor ("@"); /* ask for the last signal */ |
| 598 | expect_prompt (1); /* See if we get a expect_prompt */ |
| 599 | #ifdef TEST_ARRAY /* skip packet for testing */ |
| 600 | make_gdb_packet (packet, "?"); /* ask for a bogus packet */ |
| 601 | if (array_send_packet (packet) == 0) |
| 602 | error ("Couldn't transmit packet\n"); |
| 603 | printf_monitor ("@\n"); /* force it to flush stdout */ |
| 604 | expect_prompt (1); /* See if we get a expect_prompt */ |
| 605 | #endif |
| 606 | push_target (&array_ops); |
| 607 | if (from_tty) |
| 608 | printf ("Remote target %s connected to %s\n", array_ops.to_shortname, dev_name); |
| 609 | } |
| 610 | |
| 611 | /* |
| 612 | * array_close -- Close out all files and local state before this |
| 613 | * target loses control. |
| 614 | */ |
| 615 | |
| 616 | static void |
| 617 | array_close (int quitting) |
| 618 | { |
| 619 | serial_close (array_desc); |
| 620 | array_desc = NULL; |
| 621 | |
| 622 | debuglogs (1, "array_close (quitting=%d)", quitting); |
| 623 | |
| 624 | #if defined (LOG_FILE) |
| 625 | if (log_file) |
| 626 | { |
| 627 | if (ferror (log_file)) |
| 628 | printf_filtered ("Error writing log file.\n"); |
| 629 | if (fclose (log_file) != 0) |
| 630 | printf_filtered ("Error closing log file.\n"); |
| 631 | } |
| 632 | #endif |
| 633 | } |
| 634 | |
| 635 | /* |
| 636 | * array_detach -- terminate the open connection to the remote |
| 637 | * debugger. Use this when you want to detach and do something |
| 638 | * else with your gdb. |
| 639 | */ |
| 640 | static void |
| 641 | array_detach (int from_tty) |
| 642 | { |
| 643 | |
| 644 | debuglogs (1, "array_detach ()"); |
| 645 | |
| 646 | pop_target (); /* calls array_close to do the real work */ |
| 647 | if (from_tty) |
| 648 | printf ("Ending remote %s debugging\n", target_shortname); |
| 649 | } |
| 650 | |
| 651 | /* |
| 652 | * array_attach -- attach GDB to the target. |
| 653 | */ |
| 654 | static void |
| 655 | array_attach (char *args, int from_tty) |
| 656 | { |
| 657 | if (from_tty) |
| 658 | printf ("Starting remote %s debugging\n", target_shortname); |
| 659 | |
| 660 | debuglogs (1, "array_attach (args=%s)", args); |
| 661 | |
| 662 | printf_monitor ("go %x\n"); |
| 663 | /* swallow the echo. */ |
| 664 | expect ("go %x\n", 1); |
| 665 | } |
| 666 | |
| 667 | /* |
| 668 | * array_resume -- Tell the remote machine to resume. |
| 669 | */ |
| 670 | static void |
| 671 | array_resume (ptid_t ptid, int step, enum target_signal sig) |
| 672 | { |
| 673 | debuglogs (1, "array_resume (step=%d, sig=%d)", step, sig); |
| 674 | |
| 675 | if (step) |
| 676 | { |
| 677 | printf_monitor ("s\n"); |
| 678 | } |
| 679 | else |
| 680 | { |
| 681 | printf_monitor ("go\n"); |
| 682 | } |
| 683 | } |
| 684 | |
| 685 | #define TMPBUFSIZ 5 |
| 686 | |
| 687 | /* |
| 688 | * array_wait -- Wait until the remote machine stops, then return, |
| 689 | * storing status in status just as `wait' would. |
| 690 | */ |
| 691 | static ptid_t |
| 692 | array_wait (ptid_t ptid, struct target_waitstatus *status) |
| 693 | { |
| 694 | int old_timeout = timeout; |
| 695 | int result, i; |
| 696 | char c; |
| 697 | struct serial *tty_desc; |
| 698 | serial_ttystate ttystate; |
| 699 | |
| 700 | debuglogs (1, "array_wait (), printing extraneous text."); |
| 701 | |
| 702 | status->kind = TARGET_WAITKIND_EXITED; |
| 703 | status->value.integer = 0; |
| 704 | |
| 705 | timeout = 0; /* Don't time out -- user program is running. */ |
| 706 | |
| 707 | #if !defined(__GO32__) && !defined(__MSDOS__) && !defined(_WIN32) |
| 708 | tty_desc = serial_fdopen (0); |
| 709 | ttystate = serial_get_tty_state (tty_desc); |
| 710 | serial_raw (tty_desc); |
| 711 | |
| 712 | i = 0; |
| 713 | /* poll on the serial port and the keyboard. */ |
| 714 | while (1) |
| 715 | { |
| 716 | c = readchar (timeout); |
| 717 | if (c > 0) |
| 718 | { |
| 719 | if (c == *(ARRAY_PROMPT + i)) |
| 720 | { |
| 721 | if (++i >= strlen (ARRAY_PROMPT)) |
| 722 | { /* matched the prompt */ |
| 723 | debuglogs (4, "array_wait(), got the expect_prompt."); |
| 724 | break; |
| 725 | } |
| 726 | } |
| 727 | else |
| 728 | { /* not the prompt */ |
| 729 | i = 0; |
| 730 | } |
| 731 | fputc_unfiltered (c, gdb_stdout); |
| 732 | gdb_flush (gdb_stdout); |
| 733 | } |
| 734 | c = serial_readchar (tty_desc, timeout); |
| 735 | if (c > 0) |
| 736 | { |
| 737 | serial_write (array_desc, &c, 1); |
| 738 | /* do this so it looks like there's keyboard echo */ |
| 739 | if (c == 3) /* exit on Control-C */ |
| 740 | break; |
| 741 | #if 0 |
| 742 | fputc_unfiltered (c, gdb_stdout); |
| 743 | gdb_flush (gdb_stdout); |
| 744 | #endif |
| 745 | } |
| 746 | } |
| 747 | serial_set_tty_state (tty_desc, ttystate); |
| 748 | #else |
| 749 | expect_prompt (1); |
| 750 | debuglogs (4, "array_wait(), got the expect_prompt."); |
| 751 | #endif |
| 752 | |
| 753 | status->kind = TARGET_WAITKIND_STOPPED; |
| 754 | status->value.sig = TARGET_SIGNAL_TRAP; |
| 755 | |
| 756 | timeout = old_timeout; |
| 757 | |
| 758 | return inferior_ptid; |
| 759 | } |
| 760 | |
| 761 | /* |
| 762 | * array_fetch_registers -- read the remote registers into the |
| 763 | * block regs. |
| 764 | */ |
| 765 | static void |
| 766 | array_fetch_registers (int ignored) |
| 767 | { |
| 768 | char *reg = alloca (MAX_REGISTER_RAW_SIZE); |
| 769 | int regno; |
| 770 | char *p; |
| 771 | char *packet = alloca (PBUFSIZ); |
| 772 | |
| 773 | debuglogs (1, "array_fetch_registers (ignored=%d)\n", ignored); |
| 774 | |
| 775 | memset (packet, 0, PBUFSIZ); |
| 776 | make_gdb_packet (packet, "g"); |
| 777 | if (array_send_packet (packet) == 0) |
| 778 | error ("Couldn't transmit packet\n"); |
| 779 | if (array_get_packet (packet) == 0) |
| 780 | error ("Couldn't receive packet\n"); |
| 781 | /* FIXME: read bytes from packet */ |
| 782 | debuglogs (4, "array_fetch_registers: Got a \"%s\" back\n", packet); |
| 783 | for (regno = 0; regno <= PC_REGNUM + 4; regno++) |
| 784 | { |
| 785 | /* supply register stores in target byte order, so swap here */ |
| 786 | /* FIXME: convert from ASCII hex to raw bytes */ |
| 787 | LONGEST i = ascii2hexword (packet + (regno * 8)); |
| 788 | debuglogs (5, "Adding register %d = %x\n", regno, i); |
| 789 | store_unsigned_integer (®, REGISTER_RAW_SIZE (regno), i); |
| 790 | supply_register (regno, (char *) ®); |
| 791 | } |
| 792 | } |
| 793 | |
| 794 | /* |
| 795 | * This is unused by targets like this one that use a |
| 796 | * protocol based on GDB's remote protocol. |
| 797 | */ |
| 798 | static void |
| 799 | array_fetch_register (int ignored) |
| 800 | { |
| 801 | array_fetch_registers (0 /* ignored */); |
| 802 | } |
| 803 | |
| 804 | /* |
| 805 | * Get all the registers from the targets. They come back in a large array. |
| 806 | */ |
| 807 | static void |
| 808 | array_store_registers (int ignored) |
| 809 | { |
| 810 | int regno; |
| 811 | unsigned long i; |
| 812 | char packet[PBUFSIZ]; |
| 813 | char buf[PBUFSIZ]; |
| 814 | char num[9]; |
| 815 | |
| 816 | debuglogs (1, "array_store_registers()"); |
| 817 | |
| 818 | memset (packet, 0, PBUFSIZ); |
| 819 | memset (buf, 0, PBUFSIZ); |
| 820 | buf[0] = 'G'; |
| 821 | |
| 822 | /* Unimplemented registers read as all bits zero. */ |
| 823 | /* FIXME: read bytes from packet */ |
| 824 | for (regno = 0; regno < 41; regno++) |
| 825 | { /* FIXME */ |
| 826 | /* supply register stores in target byte order, so swap here */ |
| 827 | /* FIXME: convert from ASCII hex to raw bytes */ |
| 828 | i = (unsigned long) read_register (regno); |
| 829 | hexword2ascii (num, i); |
| 830 | strcpy (buf + (regno * 8) + 1, num); |
| 831 | } |
| 832 | *(buf + (regno * 8) + 2) = 0; |
| 833 | make_gdb_packet (packet, buf); |
| 834 | if (array_send_packet (packet) == 0) |
| 835 | error ("Couldn't transmit packet\n"); |
| 836 | if (array_get_packet (packet) == 0) |
| 837 | error ("Couldn't receive packet\n"); |
| 838 | |
| 839 | registers_changed (); |
| 840 | } |
| 841 | |
| 842 | /* |
| 843 | * This is unused by targets like this one that use a |
| 844 | * protocol based on GDB's remote protocol. |
| 845 | */ |
| 846 | static void |
| 847 | array_store_register (int ignored) |
| 848 | { |
| 849 | array_store_registers (0 /* ignored */); |
| 850 | } |
| 851 | |
| 852 | /* Get ready to modify the registers array. On machines which store |
| 853 | individual registers, this doesn't need to do anything. On machines |
| 854 | which store all the registers in one fell swoop, this makes sure |
| 855 | that registers contains all the registers from the program being |
| 856 | debugged. */ |
| 857 | |
| 858 | static void |
| 859 | array_prepare_to_store (void) |
| 860 | { |
| 861 | /* Do nothing, since we can store individual regs */ |
| 862 | } |
| 863 | |
| 864 | static void |
| 865 | array_files_info (void) |
| 866 | { |
| 867 | printf ("\tAttached to %s at %d baud.\n", |
| 868 | dev_name, baudrate); |
| 869 | } |
| 870 | |
| 871 | /* |
| 872 | * array_write_inferior_memory -- Copy LEN bytes of data from debugger |
| 873 | * memory at MYADDR to inferior's memory at MEMADDR. Returns length moved. |
| 874 | */ |
| 875 | static int |
| 876 | array_write_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) |
| 877 | { |
| 878 | unsigned long i; |
| 879 | int j; |
| 880 | char packet[PBUFSIZ]; |
| 881 | char buf[PBUFSIZ]; |
| 882 | char num[9]; |
| 883 | char *p; |
| 884 | |
| 885 | debuglogs (1, "array_write_inferior_memory (memaddr=0x%x, myaddr=0x%x, len=%d)", memaddr, myaddr, len); |
| 886 | memset (buf, '\0', PBUFSIZ); /* this also sets the string terminator */ |
| 887 | p = buf; |
| 888 | |
| 889 | *p++ = 'M'; /* The command to write memory */ |
| 890 | hexword2ascii (num, memaddr); /* convert the address */ |
| 891 | strcpy (p, num); /* copy the address */ |
| 892 | p += 8; |
| 893 | *p++ = ','; /* add comma delimeter */ |
| 894 | hexword2ascii (num, len); /* Get the length as a 4 digit number */ |
| 895 | *p++ = num[4]; |
| 896 | *p++ = num[5]; |
| 897 | *p++ = num[6]; |
| 898 | *p++ = num[7]; |
| 899 | *p++ = ':'; /* add the colon delimeter */ |
| 900 | for (j = 0; j < len; j++) |
| 901 | { /* copy the data in after converting it */ |
| 902 | *p++ = tohex ((myaddr[j] >> 4) & 0xf); |
| 903 | *p++ = tohex (myaddr[j] & 0xf); |
| 904 | } |
| 905 | |
| 906 | make_gdb_packet (packet, buf); |
| 907 | if (array_send_packet (packet) == 0) |
| 908 | error ("Couldn't transmit packet\n"); |
| 909 | if (array_get_packet (packet) == 0) |
| 910 | error ("Couldn't receive packet\n"); |
| 911 | |
| 912 | return len; |
| 913 | } |
| 914 | |
| 915 | /* |
| 916 | * array_read_inferior_memory -- read LEN bytes from inferior memory |
| 917 | * at MEMADDR. Put the result at debugger address MYADDR. Returns |
| 918 | * length moved. |
| 919 | */ |
| 920 | static int |
| 921 | array_read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) |
| 922 | { |
| 923 | int j; |
| 924 | char buf[20]; |
| 925 | char packet[PBUFSIZ]; |
| 926 | int count; /* Number of bytes read so far. */ |
| 927 | unsigned long startaddr; /* Starting address of this pass. */ |
| 928 | int len_this_pass; /* Number of bytes to read in this pass. */ |
| 929 | |
| 930 | debuglogs (1, "array_read_inferior_memory (memaddr=0x%x, myaddr=0x%x, len=%d)", memaddr, myaddr, len); |
| 931 | |
| 932 | /* Note that this code works correctly if startaddr is just less |
| 933 | than UINT_MAX (well, really CORE_ADDR_MAX if there was such a |
| 934 | thing). That is, something like |
| 935 | array_read_bytes (CORE_ADDR_MAX - 4, foo, 4) |
| 936 | works--it never adds len To memaddr and gets 0. */ |
| 937 | /* However, something like |
| 938 | array_read_bytes (CORE_ADDR_MAX - 3, foo, 4) |
| 939 | doesn't need to work. Detect it and give up if there's an attempt |
| 940 | to do that. */ |
| 941 | if (((memaddr - 1) + len) < memaddr) |
| 942 | { |
| 943 | errno = EIO; |
| 944 | return 0; |
| 945 | } |
| 946 | |
| 947 | for (count = 0, startaddr = memaddr; count < len; startaddr += len_this_pass) |
| 948 | { |
| 949 | /* Try to align to 16 byte boundry (why?) */ |
| 950 | len_this_pass = 16; |
| 951 | if ((startaddr % 16) != 0) |
| 952 | { |
| 953 | len_this_pass -= startaddr % 16; |
| 954 | } |
| 955 | /* Only transfer bytes we need */ |
| 956 | if (len_this_pass > (len - count)) |
| 957 | { |
| 958 | len_this_pass = (len - count); |
| 959 | } |
| 960 | /* Fetch the bytes */ |
| 961 | debuglogs (3, "read %d bytes from inferior address %x", len_this_pass, |
| 962 | startaddr); |
| 963 | sprintf (buf, "m%08lx,%04x", startaddr, len_this_pass); |
| 964 | make_gdb_packet (packet, buf); |
| 965 | if (array_send_packet (packet) == 0) |
| 966 | { |
| 967 | error ("Couldn't transmit packet\n"); |
| 968 | } |
| 969 | if (array_get_packet (packet) == 0) |
| 970 | { |
| 971 | error ("Couldn't receive packet\n"); |
| 972 | } |
| 973 | if (*packet == 0) |
| 974 | { |
| 975 | error ("Got no data in the GDB packet\n"); |
| 976 | } |
| 977 | /* Pick packet apart and xfer bytes to myaddr */ |
| 978 | debuglogs (4, "array_read_inferior_memory: Got a \"%s\" back\n", packet); |
| 979 | for (j = 0; j < len_this_pass; j++) |
| 980 | { |
| 981 | /* extract the byte values */ |
| 982 | myaddr[count++] = from_hex (*(packet + (j * 2))) * 16 + from_hex (*(packet + (j * 2) + 1)); |
| 983 | debuglogs (5, "myaddr[%d] set to %x\n", count - 1, myaddr[count - 1]); |
| 984 | } |
| 985 | } |
| 986 | return (count); |
| 987 | } |
| 988 | |
| 989 | /* Transfer LEN bytes between GDB address MYADDR and target address |
| 990 | MEMADDR. If WRITE is non-zero, transfer them to the target, |
| 991 | otherwise transfer them from the target. TARGET is unused. |
| 992 | |
| 993 | Returns the number of bytes transferred. */ |
| 994 | |
| 995 | static int |
| 996 | array_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
| 997 | struct mem_attrib *attrib ATTRIBUTE_UNUSED, |
| 998 | struct target_ops *target ATTRIBUTE_UNUSED) |
| 999 | { |
| 1000 | if (write) |
| 1001 | return array_write_inferior_memory (memaddr, myaddr, len); |
| 1002 | else |
| 1003 | return array_read_inferior_memory (memaddr, myaddr, len); |
| 1004 | } |
| 1005 | |
| 1006 | static void |
| 1007 | array_kill (char *args, int from_tty) |
| 1008 | { |
| 1009 | return; /* ignore attempts to kill target system */ |
| 1010 | } |
| 1011 | |
| 1012 | /* Clean up when a program exits. |
| 1013 | The program actually lives on in the remote processor's RAM, and may be |
| 1014 | run again without a download. Don't leave it full of breakpoint |
| 1015 | instructions. */ |
| 1016 | |
| 1017 | static void |
| 1018 | array_mourn_inferior (void) |
| 1019 | { |
| 1020 | remove_breakpoints (); |
| 1021 | generic_mourn_inferior (); /* Do all the proper things now */ |
| 1022 | } |
| 1023 | |
| 1024 | #define MAX_ARRAY_BREAKPOINTS 16 |
| 1025 | |
| 1026 | static CORE_ADDR breakaddr[MAX_ARRAY_BREAKPOINTS] = |
| 1027 | {0}; |
| 1028 | |
| 1029 | /* |
| 1030 | * array_insert_breakpoint -- add a breakpoint |
| 1031 | */ |
| 1032 | static int |
| 1033 | array_insert_breakpoint (CORE_ADDR addr, char *shadow) |
| 1034 | { |
| 1035 | int i; |
| 1036 | int bp_size = 0; |
| 1037 | CORE_ADDR bp_addr = addr; |
| 1038 | |
| 1039 | debuglogs (1, "array_insert_breakpoint() addr = 0x%x", addr); |
| 1040 | BREAKPOINT_FROM_PC (&bp_addr, &bp_size); |
| 1041 | |
| 1042 | for (i = 0; i <= MAX_ARRAY_BREAKPOINTS; i++) |
| 1043 | { |
| 1044 | if (breakaddr[i] == 0) |
| 1045 | { |
| 1046 | breakaddr[i] = addr; |
| 1047 | if (sr_get_debug () > 4) |
| 1048 | printf ("Breakpoint at %s\n", paddr_nz (addr)); |
| 1049 | array_read_inferior_memory (bp_addr, shadow, bp_size); |
| 1050 | printf_monitor ("b 0x%x\n", addr); |
| 1051 | expect_prompt (1); |
| 1052 | return 0; |
| 1053 | } |
| 1054 | } |
| 1055 | |
| 1056 | fprintf (stderr, "Too many breakpoints (> 16) for monitor\n"); |
| 1057 | return 1; |
| 1058 | } |
| 1059 | |
| 1060 | /* |
| 1061 | * _remove_breakpoint -- Tell the monitor to remove a breakpoint |
| 1062 | */ |
| 1063 | static int |
| 1064 | array_remove_breakpoint (CORE_ADDR addr, char *shadow) |
| 1065 | { |
| 1066 | int i; |
| 1067 | |
| 1068 | debuglogs (1, "array_remove_breakpoint() addr = 0x%x", addr); |
| 1069 | |
| 1070 | for (i = 0; i < MAX_ARRAY_BREAKPOINTS; i++) |
| 1071 | { |
| 1072 | if (breakaddr[i] == addr) |
| 1073 | { |
| 1074 | breakaddr[i] = 0; |
| 1075 | /* some monitors remove breakpoints based on the address */ |
| 1076 | printf_monitor ("bd %x\n", i); |
| 1077 | expect_prompt (1); |
| 1078 | return 0; |
| 1079 | } |
| 1080 | } |
| 1081 | fprintf (stderr, "Can't find breakpoint associated with 0x%s\n", |
| 1082 | paddr_nz (addr)); |
| 1083 | return 1; |
| 1084 | } |
| 1085 | |
| 1086 | static void |
| 1087 | array_stop (void) |
| 1088 | { |
| 1089 | debuglogs (1, "array_stop()"); |
| 1090 | printf_monitor ("\003"); |
| 1091 | expect_prompt (1); |
| 1092 | } |
| 1093 | |
| 1094 | /* |
| 1095 | * array_command -- put a command string, in args, out to MONITOR. |
| 1096 | * Output from MONITOR is placed on the users terminal until the |
| 1097 | * expect_prompt is seen. FIXME |
| 1098 | */ |
| 1099 | static void |
| 1100 | monitor_command (char *args, int fromtty) |
| 1101 | { |
| 1102 | debuglogs (1, "monitor_command (args=%s)", args); |
| 1103 | |
| 1104 | if (array_desc == NULL) |
| 1105 | error ("monitor target not open."); |
| 1106 | |
| 1107 | if (!args) |
| 1108 | error ("Missing command."); |
| 1109 | |
| 1110 | printf_monitor ("%s\n", args); |
| 1111 | expect_prompt (0); |
| 1112 | } |
| 1113 | |
| 1114 | /* |
| 1115 | * make_gdb_packet -- make a GDB packet. The data is always ASCII. |
| 1116 | * A debug packet whose contents are <data> |
| 1117 | * is encapsulated for transmission in the form: |
| 1118 | * |
| 1119 | * $ <data> # CSUM1 CSUM2 |
| 1120 | * |
| 1121 | * <data> must be ASCII alphanumeric and cannot include characters |
| 1122 | * '$' or '#'. If <data> starts with two characters followed by |
| 1123 | * ':', then the existing stubs interpret this as a sequence number. |
| 1124 | * |
| 1125 | * CSUM1 and CSUM2 are ascii hex representation of an 8-bit |
| 1126 | * checksum of <data>, the most significant nibble is sent first. |
| 1127 | * the hex digits 0-9,a-f are used. |
| 1128 | * |
| 1129 | */ |
| 1130 | static void |
| 1131 | make_gdb_packet (char *buf, char *data) |
| 1132 | { |
| 1133 | int i; |
| 1134 | unsigned char csum = 0; |
| 1135 | int cnt; |
| 1136 | char *p; |
| 1137 | |
| 1138 | debuglogs (3, "make_gdb_packet(%s)\n", data); |
| 1139 | cnt = strlen (data); |
| 1140 | if (cnt > PBUFSIZ) |
| 1141 | error ("make_gdb_packet(): to much data\n"); |
| 1142 | |
| 1143 | /* start with the packet header */ |
| 1144 | p = buf; |
| 1145 | *p++ = '$'; |
| 1146 | |
| 1147 | /* calculate the checksum */ |
| 1148 | for (i = 0; i < cnt; i++) |
| 1149 | { |
| 1150 | csum += data[i]; |
| 1151 | *p++ = data[i]; |
| 1152 | } |
| 1153 | |
| 1154 | /* terminate the data with a '#' */ |
| 1155 | *p++ = '#'; |
| 1156 | |
| 1157 | /* add the checksum as two ascii digits */ |
| 1158 | *p++ = tohex ((csum >> 4) & 0xf); |
| 1159 | *p++ = tohex (csum & 0xf); |
| 1160 | *p = 0x0; /* Null terminator on string */ |
| 1161 | } |
| 1162 | |
| 1163 | /* |
| 1164 | * array_send_packet -- send a GDB packet to the target with error handling. We |
| 1165 | * get a '+' (ACK) back if the packet is received and the checksum |
| 1166 | * matches. Otherwise a '-' (NAK) is returned. It returns a 1 for a |
| 1167 | * successful transmition, or a 0 for a failure. |
| 1168 | */ |
| 1169 | static int |
| 1170 | array_send_packet (char *packet) |
| 1171 | { |
| 1172 | int c, retries, i; |
| 1173 | char junk[PBUFSIZ]; |
| 1174 | |
| 1175 | retries = 0; |
| 1176 | |
| 1177 | #if 0 |
| 1178 | /* scan the packet to make sure it only contains valid characters. |
| 1179 | this may sound silly, but sometimes a garbled packet will hang |
| 1180 | the target board. We scan the whole thing, then print the error |
| 1181 | message. |
| 1182 | */ |
| 1183 | for (i = 0; i < strlen (packet); i++) |
| 1184 | { |
| 1185 | debuglogs (5, "array_send_packet(): Scanning \'%c\'\n", packet[i]); |
| 1186 | /* legit hex numbers or command */ |
| 1187 | if ((isxdigit (packet[i])) || (isalpha (packet[i]))) |
| 1188 | continue; |
| 1189 | switch (packet[i]) |
| 1190 | { |
| 1191 | case '+': /* ACK */ |
| 1192 | case '-': /* NAK */ |
| 1193 | case '#': /* end of packet */ |
| 1194 | case '$': /* start of packet */ |
| 1195 | continue; |
| 1196 | default: /* bogus character */ |
| 1197 | retries++; |
| 1198 | debuglogs (4, "array_send_packet(): Found a non-ascii digit \'%c\' in the packet.\n", packet[i]); |
| 1199 | } |
| 1200 | } |
| 1201 | #endif |
| 1202 | |
| 1203 | if (retries > 0) |
| 1204 | error ("Can't send packet, found %d non-ascii characters", retries); |
| 1205 | |
| 1206 | /* ok, try to send the packet */ |
| 1207 | retries = 0; |
| 1208 | while (retries++ <= 10) |
| 1209 | { |
| 1210 | printf_monitor ("%s", packet); |
| 1211 | |
| 1212 | /* read until either a timeout occurs (-2) or '+' is read */ |
| 1213 | while (retries <= 10) |
| 1214 | { |
| 1215 | c = readchar (-timeout); |
| 1216 | debuglogs (3, "Reading a GDB protocol packet... Got a '%c'\n", c); |
| 1217 | switch (c) |
| 1218 | { |
| 1219 | case '+': |
| 1220 | debuglogs (3, "Got Ack\n"); |
| 1221 | return 1; |
| 1222 | case SERIAL_TIMEOUT: |
| 1223 | debuglogs (3, "Timed out reading serial port\n"); |
| 1224 | printf_monitor ("@"); /* resync with the monitor */ |
| 1225 | expect_prompt (1); /* See if we get a expect_prompt */ |
| 1226 | break; /* Retransmit buffer */ |
| 1227 | case '-': |
| 1228 | debuglogs (3, "Got NAK\n"); |
| 1229 | printf_monitor ("@"); /* resync with the monitor */ |
| 1230 | expect_prompt (1); /* See if we get a expect_prompt */ |
| 1231 | break; |
| 1232 | case '$': |
| 1233 | /* it's probably an old response, or the echo of our command. |
| 1234 | * just gobble up the packet and ignore it. |
| 1235 | */ |
| 1236 | debuglogs (3, "Got a junk packet\n"); |
| 1237 | i = 0; |
| 1238 | do |
| 1239 | { |
| 1240 | c = readchar (timeout); |
| 1241 | junk[i++] = c; |
| 1242 | } |
| 1243 | while (c != '#'); |
| 1244 | c = readchar (timeout); |
| 1245 | junk[i++] = c; |
| 1246 | c = readchar (timeout); |
| 1247 | junk[i++] = c; |
| 1248 | junk[i++] = '\0'; |
| 1249 | debuglogs (3, "Reading a junk packet, got a \"%s\"\n", junk); |
| 1250 | continue; /* Now, go look for next packet */ |
| 1251 | default: |
| 1252 | continue; |
| 1253 | } |
| 1254 | retries++; |
| 1255 | debuglogs (3, "Retransmitting packet \"%s\"\n", packet); |
| 1256 | break; /* Here to retransmit */ |
| 1257 | } |
| 1258 | } /* outer while */ |
| 1259 | return 0; |
| 1260 | } |
| 1261 | |
| 1262 | /* |
| 1263 | * array_get_packet -- get a GDB packet from the target. Basically we read till we |
| 1264 | * see a '#', then check the checksum. It returns a 1 if it's gotten a |
| 1265 | * packet, or a 0 it the packet wasn't transmitted correctly. |
| 1266 | */ |
| 1267 | static int |
| 1268 | array_get_packet (char *packet) |
| 1269 | { |
| 1270 | int c; |
| 1271 | int retries; |
| 1272 | unsigned char csum; |
| 1273 | unsigned char pktcsum; |
| 1274 | char *bp; |
| 1275 | |
| 1276 | csum = 0; |
| 1277 | bp = packet; |
| 1278 | |
| 1279 | memset (packet, 1, PBUFSIZ); |
| 1280 | retries = 0; |
| 1281 | while (retries <= 10) |
| 1282 | { |
| 1283 | do |
| 1284 | { |
| 1285 | c = readchar (timeout); |
| 1286 | if (c == SERIAL_TIMEOUT) |
| 1287 | { |
| 1288 | debuglogs (3, "array_get_packet: got time out from serial port.\n"); |
| 1289 | } |
| 1290 | debuglogs (3, "Waiting for a '$', got a %c\n", c); |
| 1291 | } |
| 1292 | while (c != '$'); |
| 1293 | |
| 1294 | retries = 0; |
| 1295 | while (retries <= 10) |
| 1296 | { |
| 1297 | c = readchar (timeout); |
| 1298 | debuglogs (3, "array_get_packet: got a '%c'\n", c); |
| 1299 | switch (c) |
| 1300 | { |
| 1301 | case SERIAL_TIMEOUT: |
| 1302 | debuglogs (3, "Timeout in mid-packet, retrying\n"); |
| 1303 | return 0; |
| 1304 | case '$': |
| 1305 | debuglogs (3, "Saw new packet start in middle of old one\n"); |
| 1306 | return 0; /* Start a new packet, count retries */ |
| 1307 | case '#': |
| 1308 | *bp = '\0'; |
| 1309 | pktcsum = from_hex (readchar (timeout)) << 4; |
| 1310 | pktcsum |= from_hex (readchar (timeout)); |
| 1311 | if (csum == 0) |
| 1312 | debuglogs (3, "\nGDB packet checksum zero, must be a bogus packet\n"); |
| 1313 | if (csum == pktcsum) |
| 1314 | { |
| 1315 | debuglogs (3, "\nGDB packet checksum correct, packet data is \"%s\",\n", packet); |
| 1316 | printf_monitor ("@"); |
| 1317 | expect_prompt (1); |
| 1318 | return 1; |
| 1319 | } |
| 1320 | debuglogs (3, "Bad checksum, sentsum=0x%x, csum=0x%x\n", pktcsum, csum); |
| 1321 | return 0; |
| 1322 | case '*': /* Run length encoding */ |
| 1323 | debuglogs (5, "Run length encoding in packet\n"); |
| 1324 | csum += c; |
| 1325 | c = readchar (timeout); |
| 1326 | csum += c; |
| 1327 | c = c - ' ' + 3; /* Compute repeat count */ |
| 1328 | |
| 1329 | if (c > 0 && c < 255 && bp + c - 1 < packet + PBUFSIZ - 1) |
| 1330 | { |
| 1331 | memset (bp, *(bp - 1), c); |
| 1332 | bp += c; |
| 1333 | continue; |
| 1334 | } |
| 1335 | *bp = '\0'; |
| 1336 | printf_filtered ("Repeat count %d too large for buffer.\n", c); |
| 1337 | return 0; |
| 1338 | |
| 1339 | default: |
| 1340 | if ((!isxdigit (c)) && (!ispunct (c))) |
| 1341 | debuglogs (4, "Got a non-ascii digit \'%c\'.\\n", c); |
| 1342 | if (bp < packet + PBUFSIZ - 1) |
| 1343 | { |
| 1344 | *bp++ = c; |
| 1345 | csum += c; |
| 1346 | continue; |
| 1347 | } |
| 1348 | |
| 1349 | *bp = '\0'; |
| 1350 | puts_filtered ("Remote packet too long.\n"); |
| 1351 | return 0; |
| 1352 | } |
| 1353 | } |
| 1354 | } |
| 1355 | return 0; /* exceeded retries */ |
| 1356 | } |
| 1357 | |
| 1358 | /* |
| 1359 | * ascii2hexword -- convert an ascii number represented by 8 digits to a hex value. |
| 1360 | */ |
| 1361 | static unsigned long |
| 1362 | ascii2hexword (unsigned char *mem) |
| 1363 | { |
| 1364 | unsigned long val; |
| 1365 | int i; |
| 1366 | char buf[9]; |
| 1367 | |
| 1368 | val = 0; |
| 1369 | for (i = 0; i < 8; i++) |
| 1370 | { |
| 1371 | val <<= 4; |
| 1372 | if (mem[i] >= 'A' && mem[i] <= 'F') |
| 1373 | val = val + mem[i] - 'A' + 10; |
| 1374 | if (mem[i] >= 'a' && mem[i] <= 'f') |
| 1375 | val = val + mem[i] - 'a' + 10; |
| 1376 | if (mem[i] >= '0' && mem[i] <= '9') |
| 1377 | val = val + mem[i] - '0'; |
| 1378 | buf[i] = mem[i]; |
| 1379 | } |
| 1380 | buf[8] = '\0'; |
| 1381 | debuglogs (4, "ascii2hexword() got a 0x%x from %s(%x).\n", val, buf, mem); |
| 1382 | return val; |
| 1383 | } |
| 1384 | |
| 1385 | /* |
| 1386 | * ascii2hexword -- convert a hex value to an ascii number represented by 8 |
| 1387 | * digits. |
| 1388 | */ |
| 1389 | static void |
| 1390 | hexword2ascii (unsigned char *mem, unsigned long num) |
| 1391 | { |
| 1392 | int i; |
| 1393 | unsigned char ch; |
| 1394 | |
| 1395 | debuglogs (4, "hexword2ascii() converting %x ", num); |
| 1396 | for (i = 7; i >= 0; i--) |
| 1397 | { |
| 1398 | mem[i] = tohex ((num >> 4) & 0xf); |
| 1399 | mem[i] = tohex (num & 0xf); |
| 1400 | num = num >> 4; |
| 1401 | } |
| 1402 | mem[8] = '\0'; |
| 1403 | debuglogs (4, "\tto a %s", mem); |
| 1404 | } |
| 1405 | |
| 1406 | /* Convert hex digit A to a number. */ |
| 1407 | static int |
| 1408 | from_hex (int a) |
| 1409 | { |
| 1410 | if (a == 0) |
| 1411 | return 0; |
| 1412 | |
| 1413 | debuglogs (4, "from_hex got a 0x%x(%c)\n", a, a); |
| 1414 | if (a >= '0' && a <= '9') |
| 1415 | return a - '0'; |
| 1416 | if (a >= 'a' && a <= 'f') |
| 1417 | return a - 'a' + 10; |
| 1418 | if (a >= 'A' && a <= 'F') |
| 1419 | return a - 'A' + 10; |
| 1420 | else |
| 1421 | { |
| 1422 | error ("Reply contains invalid hex digit 0x%x", a); |
| 1423 | } |
| 1424 | } |
| 1425 | |
| 1426 | /* Convert number NIB to a hex digit. */ |
| 1427 | static int |
| 1428 | tohex (int nib) |
| 1429 | { |
| 1430 | if (nib < 10) |
| 1431 | return '0' + nib; |
| 1432 | else |
| 1433 | return 'a' + nib - 10; |
| 1434 | } |
| 1435 | |
| 1436 | /* |
| 1437 | * _initialize_remote_monitors -- setup a few addtitional commands that |
| 1438 | * are usually only used by monitors. |
| 1439 | */ |
| 1440 | void |
| 1441 | _initialize_remote_monitors (void) |
| 1442 | { |
| 1443 | /* generic monitor command */ |
| 1444 | add_com ("monitor", class_obscure, monitor_command, |
| 1445 | "Send a command to the debug monitor."); |
| 1446 | |
| 1447 | } |
| 1448 | |
| 1449 | /* |
| 1450 | * _initialize_array -- do any special init stuff for the target. |
| 1451 | */ |
| 1452 | void |
| 1453 | _initialize_array (void) |
| 1454 | { |
| 1455 | init_array_ops (); |
| 1456 | add_target (&array_ops); |
| 1457 | } |