| 1 | /* Remote debugging interface for boot monitors, for GDB. |
| 2 | Copyright 1990, 1991, 1992, 1993, 1995, 1996 |
| 3 | Free Software Foundation, Inc. |
| 4 | Contributed by Cygnus Support. Written by Rob Savoye for Cygnus. |
| 5 | Resurrected from the ashes by Stu Grossman. |
| 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 2 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, write to the Free Software |
| 21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | /* This file was derived from various remote-* modules. It is a collection |
| 24 | of generic support functions so GDB can talk directly to a ROM based |
| 25 | monitor. This saves use from having to hack an exception based handler |
| 26 | into existance, and makes for quick porting. |
| 27 | |
| 28 | This module talks to a debug monitor called 'MONITOR', which |
| 29 | We communicate with MONITOR via either a direct serial line, or a TCP |
| 30 | (or possibly TELNET) stream to a terminal multiplexor, |
| 31 | which in turn talks to the target board. */ |
| 32 | |
| 33 | /* FIXME 32x64: This code assumes that registers and addresses are at |
| 34 | most 32 bits long. If they can be larger, you will need to declare |
| 35 | values as LONGEST and use %llx or some such to print values when |
| 36 | building commands to send to the monitor. Since we don't know of |
| 37 | any actual 64-bit targets with ROM monitors that use this code, |
| 38 | it's not an issue right now. -sts 4/18/96 */ |
| 39 | |
| 40 | #include "defs.h" |
| 41 | #include "gdbcore.h" |
| 42 | #include "target.h" |
| 43 | #include "wait.h" |
| 44 | #ifdef ANSI_PROTOTYPES |
| 45 | #include <stdarg.h> |
| 46 | #else |
| 47 | #include <varargs.h> |
| 48 | #endif |
| 49 | #include <signal.h> |
| 50 | #include <ctype.h> |
| 51 | #include "gdb_string.h" |
| 52 | #include <sys/types.h> |
| 53 | #include "command.h" |
| 54 | #include "serial.h" |
| 55 | #include "monitor.h" |
| 56 | #include "gdbcmd.h" |
| 57 | #include "inferior.h" |
| 58 | #include "gnu-regex.h" |
| 59 | #include "dcache.h" |
| 60 | #include "srec.h" |
| 61 | |
| 62 | static int readchar PARAMS ((int timeout)); |
| 63 | |
| 64 | static void monitor_command PARAMS ((char *args, int fromtty)); |
| 65 | |
| 66 | static void monitor_fetch_register PARAMS ((int regno)); |
| 67 | static void monitor_store_register PARAMS ((int regno)); |
| 68 | |
| 69 | static void monitor_detach PARAMS ((char *args, int from_tty)); |
| 70 | static void monitor_resume PARAMS ((int pid, int step, enum target_signal sig)); |
| 71 | static void monitor_interrupt PARAMS ((int signo)); |
| 72 | static void monitor_interrupt_twice PARAMS ((int signo)); |
| 73 | static void monitor_interrupt_query PARAMS ((void)); |
| 74 | static void monitor_wait_cleanup PARAMS ((int old_timeout)); |
| 75 | |
| 76 | static int monitor_wait PARAMS ((int pid, struct target_waitstatus *status)); |
| 77 | static void monitor_fetch_registers PARAMS ((int regno)); |
| 78 | static void monitor_store_registers PARAMS ((int regno)); |
| 79 | static void monitor_prepare_to_store PARAMS ((void)); |
| 80 | static int monitor_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len, int write, struct target_ops *target)); |
| 81 | static void monitor_files_info PARAMS ((struct target_ops *ops)); |
| 82 | static int monitor_insert_breakpoint PARAMS ((CORE_ADDR addr, char *shadow)); |
| 83 | static int monitor_remove_breakpoint PARAMS ((CORE_ADDR addr, char *shadow)); |
| 84 | static void monitor_kill PARAMS ((void)); |
| 85 | static void monitor_load PARAMS ((char *file, int from_tty)); |
| 86 | static void monitor_mourn_inferior PARAMS ((void)); |
| 87 | static void monitor_stop PARAMS ((void)); |
| 88 | static void monitor_debug PARAMS ((char *prefix, char *string, char *suffix)); |
| 89 | |
| 90 | static int monitor_read_memory PARAMS ((CORE_ADDR addr, char *myaddr,int len)); |
| 91 | static int monitor_write_memory PARAMS ((CORE_ADDR addr, char *myaddr,int len)); |
| 92 | |
| 93 | static int monitor_expect_regexp PARAMS ((struct re_pattern_buffer *pat, |
| 94 | char *buf, int buflen)); |
| 95 | static int from_hex PARAMS ((int a)); |
| 96 | static unsigned long get_hex_word PARAMS ((void)); |
| 97 | |
| 98 | static struct monitor_ops *current_monitor; |
| 99 | |
| 100 | static int hashmark; /* flag set by "set hash" */ |
| 101 | |
| 102 | static int timeout = 30; |
| 103 | |
| 104 | static int in_monitor_wait = 0; /* Non-zero means we are in monitor_wait() */ |
| 105 | |
| 106 | static void (*ofunc)(); /* Old SIGINT signal handler */ |
| 107 | |
| 108 | /* Descriptor for I/O to remote machine. Initialize it to NULL so |
| 109 | that monitor_open knows that we don't have a file open when the |
| 110 | program starts. */ |
| 111 | |
| 112 | static serial_t monitor_desc = NULL; |
| 113 | |
| 114 | /* Pointer to regexp pattern matching data */ |
| 115 | |
| 116 | static struct re_pattern_buffer register_pattern; |
| 117 | static char register_fastmap[256]; |
| 118 | |
| 119 | static struct re_pattern_buffer getmem_resp_delim_pattern; |
| 120 | static char getmem_resp_delim_fastmap[256]; |
| 121 | |
| 122 | static int dump_reg_flag; /* Non-zero means do a dump_registers cmd when |
| 123 | monitor_wait wakes up. */ |
| 124 | |
| 125 | static DCACHE *remote_dcache; |
| 126 | |
| 127 | /* monitor_debug is like fputs_unfiltered, except it prints special |
| 128 | characters in printable fashion. */ |
| 129 | |
| 130 | static void |
| 131 | monitor_debug (prefix, string, suffix) |
| 132 | char *prefix; |
| 133 | char *string; |
| 134 | char *suffix; |
| 135 | { |
| 136 | int ch; |
| 137 | |
| 138 | /* print prefix and suffix after each line */ |
| 139 | static int new_line=1; |
| 140 | static char *prev_prefix = ""; |
| 141 | static char *prev_suffix = ""; |
| 142 | |
| 143 | /* if the prefix is changing, print the previous suffix, a new line, |
| 144 | and the new prefix */ |
| 145 | if (strcmp(prev_prefix, prefix) != 0 && !new_line) |
| 146 | { |
| 147 | fputs_unfiltered (prev_suffix, gdb_stderr); |
| 148 | fputs_unfiltered ("\n", gdb_stderr); |
| 149 | fputs_unfiltered (prefix, gdb_stderr); |
| 150 | } |
| 151 | prev_prefix = prefix; |
| 152 | prev_suffix = suffix; |
| 153 | |
| 154 | /* print prefix if last char was a newline*/ |
| 155 | |
| 156 | if (new_line == 1) { |
| 157 | fputs_unfiltered (prefix, gdb_stderr); |
| 158 | new_line=0; |
| 159 | } |
| 160 | if (strchr(string,'\n')) /* save state for next call */ |
| 161 | new_line=1; |
| 162 | |
| 163 | while ((ch = *string++) != '\0') |
| 164 | { |
| 165 | switch (ch) { |
| 166 | default: |
| 167 | if (isprint (ch)) |
| 168 | fputc_unfiltered (ch, gdb_stderr); |
| 169 | |
| 170 | else |
| 171 | fprintf_unfiltered (gdb_stderr, "\\%03o", ch); |
| 172 | |
| 173 | break; |
| 174 | |
| 175 | case '\\': fputs_unfiltered ("\\\\", gdb_stderr); break; |
| 176 | case '\b': fputs_unfiltered ("\\b", gdb_stderr); break; |
| 177 | case '\f': fputs_unfiltered ("\\f", gdb_stderr); break; |
| 178 | case '\n': fputs_unfiltered ("\\n", gdb_stderr); break; |
| 179 | case '\r': fputs_unfiltered ("\\r", gdb_stderr); break; |
| 180 | case '\t': fputs_unfiltered ("\\t", gdb_stderr); break; |
| 181 | case '\v': fputs_unfiltered ("\\v", gdb_stderr); break; |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | if (new_line==1) { /* print suffix if last char was a newline */ |
| 186 | fputs_unfiltered (suffix, gdb_stderr); |
| 187 | fputs_unfiltered ("\n", gdb_stderr); |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | /* monitor_printf_noecho -- Send data to monitor, but don't expect an echo. |
| 192 | Works just like printf. */ |
| 193 | |
| 194 | void |
| 195 | #ifdef ANSI_PROTOTYPES |
| 196 | monitor_printf_noecho (char *pattern, ...) |
| 197 | #else |
| 198 | monitor_printf_noecho (va_alist) |
| 199 | va_dcl |
| 200 | #endif |
| 201 | { |
| 202 | va_list args; |
| 203 | char sndbuf[2000]; |
| 204 | int len; |
| 205 | |
| 206 | #if ANSI_PROTOTYPES |
| 207 | va_start (args, pattern); |
| 208 | #else |
| 209 | char *pattern; |
| 210 | va_start (args); |
| 211 | pattern = va_arg (args, char *); |
| 212 | #endif |
| 213 | |
| 214 | vsprintf (sndbuf, pattern, args); |
| 215 | |
| 216 | if (remote_debug > 0) |
| 217 | monitor_debug ("sent -->", sndbuf, "<--"); |
| 218 | |
| 219 | len = strlen (sndbuf); |
| 220 | |
| 221 | if (len + 1 > sizeof sndbuf) |
| 222 | abort (); |
| 223 | |
| 224 | if (SERIAL_WRITE(monitor_desc, sndbuf, len)) |
| 225 | fprintf_unfiltered (stderr, "SERIAL_WRITE failed: %s\n", safe_strerror (errno)); |
| 226 | } |
| 227 | |
| 228 | /* monitor_printf -- Send data to monitor and check the echo. Works just like |
| 229 | printf. */ |
| 230 | |
| 231 | void |
| 232 | #ifdef ANSI_PROTOTYPES |
| 233 | monitor_printf (char *pattern, ...) |
| 234 | #else |
| 235 | monitor_printf (va_alist) |
| 236 | va_dcl |
| 237 | #endif |
| 238 | { |
| 239 | va_list args; |
| 240 | char sndbuf[2000]; |
| 241 | int len; |
| 242 | |
| 243 | #ifdef ANSI_PROTOTYPES |
| 244 | va_start (args, pattern); |
| 245 | #else |
| 246 | char *pattern; |
| 247 | va_start (args); |
| 248 | pattern = va_arg (args, char *); |
| 249 | #endif |
| 250 | |
| 251 | vsprintf (sndbuf, pattern, args); |
| 252 | |
| 253 | if (remote_debug > 0) |
| 254 | monitor_debug ("sent -->", sndbuf, "<--"); |
| 255 | |
| 256 | len = strlen (sndbuf); |
| 257 | |
| 258 | if (len + 1 > sizeof sndbuf) |
| 259 | abort (); |
| 260 | |
| 261 | if (SERIAL_WRITE(monitor_desc, sndbuf, len)) |
| 262 | fprintf_unfiltered (stderr, "SERIAL_WRITE failed: %s\n", safe_strerror (errno)); |
| 263 | |
| 264 | /* We used to expect that the next immediate output was the characters we |
| 265 | just output, but sometimes some extra junk appeared before the characters |
| 266 | we expected, like an extra prompt, or a portmaster sending telnet negotiations. |
| 267 | So, just start searching for what we sent, and skip anything unknown. */ |
| 268 | monitor_expect (sndbuf, (char *)0, 0); |
| 269 | } |
| 270 | |
| 271 | /* Read a character from the remote system, doing all the fancy |
| 272 | timeout stuff. */ |
| 273 | |
| 274 | static int |
| 275 | readchar (timeout) |
| 276 | int timeout; |
| 277 | { |
| 278 | int c; |
| 279 | static enum { last_random, last_nl, last_cr, last_crnl } state = last_random; |
| 280 | int looping; |
| 281 | |
| 282 | do |
| 283 | { |
| 284 | looping = 0; |
| 285 | c = SERIAL_READCHAR (monitor_desc, timeout); |
| 286 | |
| 287 | if (c >= 0) |
| 288 | { |
| 289 | c &= 0x7f; |
| 290 | if (remote_debug > 0) |
| 291 | { |
| 292 | char buf[2]; |
| 293 | buf[0] = c; |
| 294 | buf[1] = '\0'; |
| 295 | monitor_debug ("read -->", buf, "<--"); |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | /* Canonicialize \n\r combinations into one \r */ |
| 300 | if ((current_monitor->flags & MO_HANDLE_NL) != 0) |
| 301 | { |
| 302 | if ((c == '\r' && state == last_nl) |
| 303 | || (c == '\n' && state == last_cr)) |
| 304 | { |
| 305 | state = last_crnl; |
| 306 | looping = 1; |
| 307 | } |
| 308 | else if (c == '\r') |
| 309 | state = last_cr; |
| 310 | else if (c != '\n') |
| 311 | state = last_random; |
| 312 | else |
| 313 | { |
| 314 | state = last_nl; |
| 315 | c = '\r'; |
| 316 | } |
| 317 | } |
| 318 | } |
| 319 | while (looping); |
| 320 | |
| 321 | if (c >= 0) |
| 322 | return c; |
| 323 | |
| 324 | if (c == SERIAL_TIMEOUT) |
| 325 | #ifdef MAINTENANCE_CMDS |
| 326 | if (in_monitor_wait) /* Watchdog went off */ |
| 327 | { |
| 328 | target_mourn_inferior (); |
| 329 | error ("Watchdog has expired. Target detached.\n"); |
| 330 | } |
| 331 | else |
| 332 | #endif |
| 333 | error ("Timeout reading from remote system."); |
| 334 | |
| 335 | perror_with_name ("remote-monitor"); |
| 336 | } |
| 337 | |
| 338 | /* Scan input from the remote system, until STRING is found. If BUF is non- |
| 339 | zero, then collect input until we have collected either STRING or BUFLEN-1 |
| 340 | chars. In either case we terminate BUF with a 0. If input overflows BUF |
| 341 | because STRING can't be found, return -1, else return number of chars in BUF |
| 342 | (minus the terminating NUL). Note that in the non-overflow case, STRING |
| 343 | will be at the end of BUF. */ |
| 344 | |
| 345 | int |
| 346 | monitor_expect (string, buf, buflen) |
| 347 | char *string; |
| 348 | char *buf; |
| 349 | int buflen; |
| 350 | { |
| 351 | char *p = string; |
| 352 | int obuflen = buflen; |
| 353 | int c; |
| 354 | |
| 355 | immediate_quit = 1; |
| 356 | while (1) |
| 357 | { |
| 358 | if (buf) |
| 359 | { |
| 360 | if (buflen < 2) |
| 361 | { |
| 362 | *buf = '\000'; |
| 363 | immediate_quit = 0; |
| 364 | return -1; |
| 365 | } |
| 366 | |
| 367 | c = readchar (timeout); |
| 368 | if (c == '\000') |
| 369 | continue; |
| 370 | *buf++ = c; |
| 371 | buflen--; |
| 372 | } |
| 373 | else |
| 374 | c = readchar (timeout); |
| 375 | |
| 376 | /* Don't expect any ^C sent to be echoed */ |
| 377 | |
| 378 | if (*p == '\003' || c == *p) |
| 379 | { |
| 380 | p++; |
| 381 | if (*p == '\0') |
| 382 | { |
| 383 | immediate_quit = 0; |
| 384 | |
| 385 | if (buf) |
| 386 | { |
| 387 | *buf++ = '\000'; |
| 388 | return obuflen - buflen; |
| 389 | } |
| 390 | else |
| 391 | return 0; |
| 392 | } |
| 393 | } |
| 394 | else |
| 395 | { |
| 396 | p = string; |
| 397 | if (c == *p) |
| 398 | p++; |
| 399 | } |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | /* Search for a regexp. */ |
| 404 | |
| 405 | static int |
| 406 | monitor_expect_regexp (pat, buf, buflen) |
| 407 | struct re_pattern_buffer *pat; |
| 408 | char *buf; |
| 409 | int buflen; |
| 410 | { |
| 411 | char *mybuf; |
| 412 | char *p; |
| 413 | |
| 414 | if (buf) |
| 415 | mybuf = buf; |
| 416 | else |
| 417 | { |
| 418 | mybuf = alloca (1024); |
| 419 | buflen = 1024; |
| 420 | } |
| 421 | |
| 422 | p = mybuf; |
| 423 | while (1) |
| 424 | { |
| 425 | int retval; |
| 426 | |
| 427 | if (p - mybuf >= buflen) |
| 428 | { /* Buffer about to overflow */ |
| 429 | |
| 430 | /* On overflow, we copy the upper half of the buffer to the lower half. Not |
| 431 | great, but it usually works... */ |
| 432 | |
| 433 | memcpy (mybuf, mybuf + buflen / 2, buflen / 2); |
| 434 | p = mybuf + buflen / 2; |
| 435 | } |
| 436 | |
| 437 | *p++ = readchar (timeout); |
| 438 | |
| 439 | retval = re_search (pat, mybuf, p - mybuf, 0, p - mybuf, NULL); |
| 440 | if (retval >= 0) |
| 441 | return 1; |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | /* Keep discarding input until we see the MONITOR prompt. |
| 446 | |
| 447 | The convention for dealing with the prompt is that you |
| 448 | o give your command |
| 449 | o *then* wait for the prompt. |
| 450 | |
| 451 | Thus the last thing that a procedure does with the serial line |
| 452 | will be an monitor_expect_prompt(). Exception: monitor_resume does not |
| 453 | wait for the prompt, because the terminal is being handed over |
| 454 | to the inferior. However, the next thing which happens after that |
| 455 | is a monitor_wait which does wait for the prompt. |
| 456 | Note that this includes abnormal exit, e.g. error(). This is |
| 457 | necessary to prevent getting into states from which we can't |
| 458 | recover. */ |
| 459 | |
| 460 | int |
| 461 | monitor_expect_prompt (buf, buflen) |
| 462 | char *buf; |
| 463 | int buflen; |
| 464 | { |
| 465 | return monitor_expect (current_monitor->prompt, buf, buflen); |
| 466 | } |
| 467 | |
| 468 | /* Get N 32-bit words from remote, each preceded by a space, and put |
| 469 | them in registers starting at REGNO. */ |
| 470 | |
| 471 | static unsigned long |
| 472 | get_hex_word () |
| 473 | { |
| 474 | unsigned long val; |
| 475 | int i; |
| 476 | int ch; |
| 477 | |
| 478 | do |
| 479 | ch = readchar (timeout); |
| 480 | while (isspace(ch)); |
| 481 | |
| 482 | val = from_hex (ch); |
| 483 | |
| 484 | for (i = 7; i >= 1; i--) |
| 485 | { |
| 486 | ch = readchar (timeout); |
| 487 | if (!isxdigit (ch)) |
| 488 | break; |
| 489 | val = (val << 4) | from_hex (ch); |
| 490 | } |
| 491 | |
| 492 | return val; |
| 493 | } |
| 494 | |
| 495 | static void |
| 496 | compile_pattern (pattern, compiled_pattern, fastmap) |
| 497 | char *pattern; |
| 498 | struct re_pattern_buffer *compiled_pattern; |
| 499 | char *fastmap; |
| 500 | { |
| 501 | int tmp; |
| 502 | char *val; |
| 503 | |
| 504 | compiled_pattern->fastmap = fastmap; |
| 505 | |
| 506 | tmp = re_set_syntax (RE_SYNTAX_EMACS); |
| 507 | val = re_compile_pattern (pattern, |
| 508 | strlen (pattern), |
| 509 | compiled_pattern); |
| 510 | re_set_syntax (tmp); |
| 511 | |
| 512 | if (val) |
| 513 | error ("compile_pattern: Can't compile pattern string `%s': %s!", pattern, val); |
| 514 | |
| 515 | if (fastmap) |
| 516 | re_compile_fastmap (compiled_pattern); |
| 517 | } |
| 518 | |
| 519 | /* Open a connection to a remote debugger. NAME is the filename used |
| 520 | for communication. */ |
| 521 | |
| 522 | static char *dev_name; |
| 523 | static struct target_ops *targ_ops; |
| 524 | |
| 525 | void |
| 526 | monitor_open (args, mon_ops, from_tty) |
| 527 | char *args; |
| 528 | struct monitor_ops *mon_ops; |
| 529 | int from_tty; |
| 530 | { |
| 531 | char *name; |
| 532 | int i; |
| 533 | char **p; |
| 534 | |
| 535 | if (mon_ops->magic != MONITOR_OPS_MAGIC) |
| 536 | error ("Magic number of monitor_ops struct wrong."); |
| 537 | |
| 538 | targ_ops = mon_ops->target; |
| 539 | name = targ_ops->to_shortname; |
| 540 | |
| 541 | if (!args) |
| 542 | error ("Use `target %s DEVICE-NAME' to use a serial port, or \n\ |
| 543 | `target %s HOST-NAME:PORT-NUMBER' to use a network connection.", name, name); |
| 544 | |
| 545 | target_preopen (from_tty); |
| 546 | |
| 547 | /* Setup pattern for register dump */ |
| 548 | |
| 549 | if (mon_ops->register_pattern) |
| 550 | compile_pattern (mon_ops->register_pattern, ®ister_pattern, |
| 551 | register_fastmap); |
| 552 | |
| 553 | if (mon_ops->getmem.resp_delim) |
| 554 | compile_pattern (mon_ops->getmem.resp_delim, &getmem_resp_delim_pattern, |
| 555 | getmem_resp_delim_fastmap); |
| 556 | |
| 557 | unpush_target (targ_ops); |
| 558 | |
| 559 | if (dev_name) |
| 560 | free (dev_name); |
| 561 | dev_name = strsave (args); |
| 562 | |
| 563 | monitor_desc = SERIAL_OPEN (dev_name); |
| 564 | |
| 565 | if (!monitor_desc) |
| 566 | perror_with_name (dev_name); |
| 567 | |
| 568 | if (baud_rate != -1) |
| 569 | { |
| 570 | if (SERIAL_SETBAUDRATE (monitor_desc, baud_rate)) |
| 571 | { |
| 572 | SERIAL_CLOSE (monitor_desc); |
| 573 | perror_with_name (dev_name); |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | SERIAL_RAW (monitor_desc); |
| 578 | |
| 579 | SERIAL_FLUSH_INPUT (monitor_desc); |
| 580 | |
| 581 | /* some systems only work with 2 stop bits */ |
| 582 | |
| 583 | SERIAL_SETSTOPBITS (monitor_desc, mon_ops->stopbits); |
| 584 | |
| 585 | current_monitor = mon_ops; |
| 586 | |
| 587 | /* See if we can wake up the monitor. First, try sending a stop sequence, |
| 588 | then send the init strings. Last, remove all breakpoints. */ |
| 589 | |
| 590 | if (current_monitor->stop) |
| 591 | { |
| 592 | monitor_stop (); |
| 593 | if ((current_monitor->flags & MO_NO_ECHO_ON_OPEN) == 0) |
| 594 | { |
| 595 | monitor_expect_prompt (NULL, 0); |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | /* wake up the monitor and see if it's alive */ |
| 600 | for (p = mon_ops->init; *p != NULL; p++) |
| 601 | { |
| 602 | /* Some of the characters we send may not be echoed, |
| 603 | but we hope to get a prompt at the end of it all. */ |
| 604 | |
| 605 | if ((current_monitor->flags & MO_NO_ECHO_ON_OPEN) == 0) |
| 606 | monitor_printf(*p); |
| 607 | else |
| 608 | monitor_printf_noecho (*p); |
| 609 | monitor_expect_prompt (NULL, 0); |
| 610 | } |
| 611 | |
| 612 | SERIAL_FLUSH_INPUT (monitor_desc); |
| 613 | |
| 614 | /* Remove all breakpoints */ |
| 615 | |
| 616 | if (mon_ops->clr_all_break) |
| 617 | { |
| 618 | monitor_printf (mon_ops->clr_all_break); |
| 619 | monitor_expect_prompt (NULL, 0); |
| 620 | } |
| 621 | |
| 622 | if (from_tty) |
| 623 | printf_unfiltered ("Remote target %s connected to %s\n", name, dev_name); |
| 624 | |
| 625 | push_target (targ_ops); |
| 626 | |
| 627 | inferior_pid = 42000; /* Make run command think we are busy... */ |
| 628 | |
| 629 | /* Give monitor_wait something to read */ |
| 630 | |
| 631 | monitor_printf (current_monitor->line_term); |
| 632 | |
| 633 | remote_dcache = dcache_init (monitor_read_memory, monitor_write_memory); |
| 634 | |
| 635 | start_remote (); |
| 636 | } |
| 637 | |
| 638 | /* Close out all files and local state before this target loses |
| 639 | control. */ |
| 640 | |
| 641 | void |
| 642 | monitor_close (quitting) |
| 643 | int quitting; |
| 644 | { |
| 645 | if (monitor_desc) |
| 646 | SERIAL_CLOSE (monitor_desc); |
| 647 | monitor_desc = NULL; |
| 648 | } |
| 649 | |
| 650 | /* Terminate the open connection to the remote debugger. Use this |
| 651 | when you want to detach and do something else with your gdb. */ |
| 652 | |
| 653 | static void |
| 654 | monitor_detach (args, from_tty) |
| 655 | char *args; |
| 656 | int from_tty; |
| 657 | { |
| 658 | pop_target (); /* calls monitor_close to do the real work */ |
| 659 | if (from_tty) |
| 660 | printf_unfiltered ("Ending remote %s debugging\n", target_shortname); |
| 661 | } |
| 662 | |
| 663 | /* Convert VALSTR into the target byte-ordered value of REGNO and store it. */ |
| 664 | |
| 665 | char * |
| 666 | monitor_supply_register (regno, valstr) |
| 667 | int regno; |
| 668 | char *valstr; |
| 669 | { |
| 670 | unsigned int val; |
| 671 | unsigned char regbuf[MAX_REGISTER_RAW_SIZE]; |
| 672 | char *p; |
| 673 | |
| 674 | val = strtoul (valstr, &p, 16); |
| 675 | |
| 676 | if (val == 0 && valstr == p) |
| 677 | error ("monitor_supply_register (%d): bad value from monitor: %s.", |
| 678 | regno, valstr); |
| 679 | |
| 680 | /* supply register stores in target byte order, so swap here */ |
| 681 | |
| 682 | store_unsigned_integer (regbuf, REGISTER_RAW_SIZE (regno), val); |
| 683 | |
| 684 | supply_register (regno, regbuf); |
| 685 | |
| 686 | return p; |
| 687 | } |
| 688 | |
| 689 | /* Tell the remote machine to resume. */ |
| 690 | |
| 691 | static void |
| 692 | monitor_resume (pid, step, sig) |
| 693 | int pid, step; |
| 694 | enum target_signal sig; |
| 695 | { |
| 696 | dcache_flush (remote_dcache); |
| 697 | if (step) |
| 698 | monitor_printf (current_monitor->step); |
| 699 | else |
| 700 | { |
| 701 | monitor_printf (current_monitor->cont); |
| 702 | if (current_monitor->flags & MO_NEED_REGDUMP_AFTER_CONT) |
| 703 | dump_reg_flag = 1; |
| 704 | } |
| 705 | } |
| 706 | |
| 707 | /* Parse the output of a register dump command. A monitor specific |
| 708 | regexp is used to extract individual register descriptions of the |
| 709 | form REG=VAL. Each description is split up into a name and a value |
| 710 | string which are passed down to monitor specific code. */ |
| 711 | |
| 712 | static char * |
| 713 | parse_register_dump (buf, len) |
| 714 | char *buf; |
| 715 | int len; |
| 716 | { |
| 717 | while (1) |
| 718 | { |
| 719 | int regnamelen, vallen; |
| 720 | char *regname, *val; |
| 721 | /* Element 0 points to start of register name, and element 1 |
| 722 | points to the start of the register value. */ |
| 723 | struct re_registers register_strings; |
| 724 | |
| 725 | if (re_search (®ister_pattern, buf, len, 0, len, |
| 726 | ®ister_strings) == -1) |
| 727 | break; |
| 728 | |
| 729 | regnamelen = register_strings.end[1] - register_strings.start[1]; |
| 730 | regname = buf + register_strings.start[1]; |
| 731 | vallen = register_strings.end[2] - register_strings.start[2]; |
| 732 | val = buf + register_strings.start[2]; |
| 733 | |
| 734 | current_monitor->supply_register (regname, regnamelen, val, vallen); |
| 735 | |
| 736 | buf += register_strings.end[0]; |
| 737 | len -= register_strings.end[0]; |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | /* Send ^C to target to halt it. Target will respond, and send us a |
| 742 | packet. */ |
| 743 | |
| 744 | static void |
| 745 | monitor_interrupt (signo) |
| 746 | int signo; |
| 747 | { |
| 748 | /* If this doesn't work, try more severe steps. */ |
| 749 | signal (signo, monitor_interrupt_twice); |
| 750 | |
| 751 | if (remote_debug) |
| 752 | printf_unfiltered ("monitor_interrupt called\n"); |
| 753 | |
| 754 | target_stop (); |
| 755 | } |
| 756 | |
| 757 | /* The user typed ^C twice. */ |
| 758 | |
| 759 | static void |
| 760 | monitor_interrupt_twice (signo) |
| 761 | int signo; |
| 762 | { |
| 763 | signal (signo, ofunc); |
| 764 | |
| 765 | monitor_interrupt_query (); |
| 766 | |
| 767 | signal (signo, monitor_interrupt); |
| 768 | } |
| 769 | |
| 770 | /* Ask the user what to do when an interrupt is received. */ |
| 771 | |
| 772 | static void |
| 773 | monitor_interrupt_query () |
| 774 | { |
| 775 | target_terminal_ours (); |
| 776 | |
| 777 | if (query ("Interrupted while waiting for the program.\n\ |
| 778 | Give up (and stop debugging it)? ")) |
| 779 | { |
| 780 | target_mourn_inferior (); |
| 781 | return_to_top_level (RETURN_QUIT); |
| 782 | } |
| 783 | |
| 784 | target_terminal_inferior (); |
| 785 | } |
| 786 | |
| 787 | static void |
| 788 | monitor_wait_cleanup (old_timeout) |
| 789 | int old_timeout; |
| 790 | { |
| 791 | timeout = old_timeout; |
| 792 | signal (SIGINT, ofunc); |
| 793 | in_monitor_wait = 0; |
| 794 | } |
| 795 | |
| 796 | /* Wait until the remote machine stops, then return, storing status in |
| 797 | status just as `wait' would. */ |
| 798 | |
| 799 | static int |
| 800 | monitor_wait (pid, status) |
| 801 | int pid; |
| 802 | struct target_waitstatus *status; |
| 803 | { |
| 804 | int old_timeout = timeout; |
| 805 | char buf[1024]; |
| 806 | int resp_len; |
| 807 | struct cleanup *old_chain; |
| 808 | |
| 809 | status->kind = TARGET_WAITKIND_EXITED; |
| 810 | status->value.integer = 0; |
| 811 | |
| 812 | old_chain = make_cleanup (monitor_wait_cleanup, old_timeout); |
| 813 | |
| 814 | #ifdef MAINTENANCE_CMDS |
| 815 | in_monitor_wait = 1; |
| 816 | timeout = watchdog > 0 ? watchdog : -1; |
| 817 | #else |
| 818 | timeout = -1; /* Don't time out -- user program is running. */ |
| 819 | #endif |
| 820 | |
| 821 | ofunc = (void (*)()) signal (SIGINT, monitor_interrupt); |
| 822 | |
| 823 | do |
| 824 | { |
| 825 | resp_len = monitor_expect_prompt (buf, sizeof (buf)); |
| 826 | |
| 827 | if (resp_len <= 0) |
| 828 | fprintf_unfiltered (gdb_stderr, "monitor_wait: excessive response from monitor: %s.", buf); |
| 829 | } |
| 830 | while (resp_len < 0); |
| 831 | |
| 832 | signal (SIGINT, ofunc); |
| 833 | |
| 834 | timeout = old_timeout; |
| 835 | |
| 836 | if (dump_reg_flag && current_monitor->dump_registers) |
| 837 | { |
| 838 | dump_reg_flag = 0; |
| 839 | |
| 840 | monitor_printf (current_monitor->dump_registers); |
| 841 | resp_len = monitor_expect_prompt (buf, sizeof (buf)); |
| 842 | } |
| 843 | |
| 844 | if (current_monitor->register_pattern) |
| 845 | parse_register_dump (buf, resp_len); |
| 846 | |
| 847 | status->kind = TARGET_WAITKIND_STOPPED; |
| 848 | status->value.sig = TARGET_SIGNAL_TRAP; |
| 849 | |
| 850 | discard_cleanups (old_chain); |
| 851 | |
| 852 | in_monitor_wait = 0; |
| 853 | |
| 854 | return inferior_pid; |
| 855 | } |
| 856 | |
| 857 | /* Fetch register REGNO, or all registers if REGNO is -1. Returns |
| 858 | errno value. */ |
| 859 | |
| 860 | static void |
| 861 | monitor_fetch_register (regno) |
| 862 | int regno; |
| 863 | { |
| 864 | char *name; |
| 865 | static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0}; |
| 866 | char regbuf[MAX_REGISTER_RAW_SIZE * 2 + 1]; |
| 867 | int i; |
| 868 | |
| 869 | name = current_monitor->regnames[regno]; |
| 870 | |
| 871 | if (!name) |
| 872 | { |
| 873 | supply_register (regno, zerobuf); |
| 874 | return; |
| 875 | } |
| 876 | |
| 877 | /* send the register examine command */ |
| 878 | |
| 879 | monitor_printf (current_monitor->getreg.cmd, name); |
| 880 | |
| 881 | /* If RESP_DELIM is specified, we search for that as a leading |
| 882 | delimiter for the register value. Otherwise, we just start |
| 883 | searching from the start of the buf. */ |
| 884 | |
| 885 | if (current_monitor->getreg.resp_delim) |
| 886 | monitor_expect (current_monitor->getreg.resp_delim, NULL, 0); |
| 887 | |
| 888 | /* Read upto the maximum number of hex digits for this register, skipping |
| 889 | spaces, but stop reading if something else is seen. Some monitors |
| 890 | like to drop leading zeros. */ |
| 891 | |
| 892 | for (i = 0; i < REGISTER_RAW_SIZE (regno) * 2; i++) |
| 893 | { |
| 894 | int c; |
| 895 | c = readchar (timeout); |
| 896 | while (c == ' ') |
| 897 | c = readchar (timeout); |
| 898 | |
| 899 | if (!isxdigit (c)) |
| 900 | break; |
| 901 | |
| 902 | regbuf[i] = c; |
| 903 | } |
| 904 | |
| 905 | regbuf[i] = '\000'; /* terminate the number */ |
| 906 | |
| 907 | /* If TERM is present, we wait for that to show up. Also, (if TERM |
| 908 | is present), we will send TERM_CMD if that is present. In any |
| 909 | case, we collect all of the output into buf, and then wait for |
| 910 | the normal prompt. */ |
| 911 | |
| 912 | if (current_monitor->getreg.term) |
| 913 | { |
| 914 | monitor_expect (current_monitor->getreg.term, NULL, 0); /* get response */ |
| 915 | |
| 916 | if (current_monitor->getreg.term_cmd) |
| 917 | { |
| 918 | monitor_printf (current_monitor->getreg.term_cmd); |
| 919 | monitor_expect_prompt (NULL, 0); |
| 920 | } |
| 921 | } |
| 922 | else |
| 923 | monitor_expect_prompt (NULL, 0); /* get response */ |
| 924 | |
| 925 | monitor_supply_register (regno, regbuf); |
| 926 | } |
| 927 | |
| 928 | /* Read the remote registers into the block regs. */ |
| 929 | |
| 930 | static void monitor_dump_regs () |
| 931 | { |
| 932 | if (current_monitor->dump_registers) |
| 933 | { |
| 934 | char buf[200]; |
| 935 | int resp_len; |
| 936 | |
| 937 | monitor_printf (current_monitor->dump_registers); |
| 938 | resp_len = monitor_expect_prompt (buf, sizeof (buf)); |
| 939 | parse_register_dump (buf, resp_len); |
| 940 | } |
| 941 | else |
| 942 | abort(); /* Need some way to read registers */ |
| 943 | } |
| 944 | |
| 945 | static void |
| 946 | monitor_fetch_registers (regno) |
| 947 | int regno; |
| 948 | { |
| 949 | if (current_monitor->getreg.cmd) |
| 950 | { |
| 951 | if (regno >= 0) |
| 952 | { |
| 953 | monitor_fetch_register (regno); |
| 954 | return; |
| 955 | } |
| 956 | |
| 957 | for (regno = 0; regno < NUM_REGS; regno++) |
| 958 | monitor_fetch_register (regno); |
| 959 | } |
| 960 | else { |
| 961 | monitor_dump_regs (); |
| 962 | } |
| 963 | } |
| 964 | |
| 965 | /* Store register REGNO, or all if REGNO == 0. Return errno value. */ |
| 966 | |
| 967 | static void |
| 968 | monitor_store_register (regno) |
| 969 | int regno; |
| 970 | { |
| 971 | char *name; |
| 972 | unsigned int val; |
| 973 | |
| 974 | name = current_monitor->regnames[regno]; |
| 975 | if (!name) |
| 976 | return; |
| 977 | |
| 978 | val = read_register (regno); |
| 979 | |
| 980 | /* send the register deposit command */ |
| 981 | |
| 982 | monitor_printf (current_monitor->setreg.cmd, name, val); |
| 983 | |
| 984 | /* It's possible that there are actually some monitors out there that |
| 985 | will prompt you when you set a register. In that case, you may |
| 986 | need to add some code here to deal with TERM and TERM_CMD (see |
| 987 | monitor_fetch_register to get an idea of what's needed...) */ |
| 988 | |
| 989 | monitor_expect_prompt (NULL, 0); |
| 990 | } |
| 991 | |
| 992 | /* Store the remote registers. */ |
| 993 | |
| 994 | static void |
| 995 | monitor_store_registers (regno) |
| 996 | int regno; |
| 997 | { |
| 998 | if (regno >= 0) |
| 999 | { |
| 1000 | monitor_store_register (regno); |
| 1001 | return; |
| 1002 | } |
| 1003 | |
| 1004 | for (regno = 0; regno < NUM_REGS; regno++) |
| 1005 | monitor_store_register (regno); |
| 1006 | } |
| 1007 | |
| 1008 | /* Get ready to modify the registers array. On machines which store |
| 1009 | individual registers, this doesn't need to do anything. On machines |
| 1010 | which store all the registers in one fell swoop, this makes sure |
| 1011 | that registers contains all the registers from the program being |
| 1012 | debugged. */ |
| 1013 | |
| 1014 | static void |
| 1015 | monitor_prepare_to_store () |
| 1016 | { |
| 1017 | /* Do nothing, since we can store individual regs */ |
| 1018 | } |
| 1019 | |
| 1020 | static void |
| 1021 | monitor_files_info (ops) |
| 1022 | struct target_ops *ops; |
| 1023 | { |
| 1024 | printf_unfiltered ("\tAttached to %s at %d baud.\n", dev_name, baud_rate); |
| 1025 | } |
| 1026 | |
| 1027 | static int |
| 1028 | monitor_write_memory (memaddr, myaddr, len) |
| 1029 | CORE_ADDR memaddr; |
| 1030 | char *myaddr; |
| 1031 | int len; |
| 1032 | { |
| 1033 | unsigned int val; |
| 1034 | char *cmd; |
| 1035 | int i; |
| 1036 | |
| 1037 | /* Use memory fill command for leading 0 bytes. */ |
| 1038 | |
| 1039 | if (current_monitor->fill) |
| 1040 | { |
| 1041 | for (i = 0; i < len; i++) |
| 1042 | if (myaddr[i] != 0) |
| 1043 | break; |
| 1044 | |
| 1045 | if (i > 4) /* More than 4 zeros is worth doing */ |
| 1046 | { |
| 1047 | if (current_monitor->flags & MO_FILL_USES_ADDR) |
| 1048 | monitor_printf (current_monitor->fill, memaddr, memaddr + i, 0); |
| 1049 | else |
| 1050 | monitor_printf (current_monitor->fill, memaddr, i, 0); |
| 1051 | |
| 1052 | monitor_expect_prompt (NULL, 0); |
| 1053 | |
| 1054 | return i; |
| 1055 | } |
| 1056 | } |
| 1057 | |
| 1058 | if ((memaddr & 0x7) == 0 && len >= 8 && current_monitor->setmem.cmdll) |
| 1059 | { |
| 1060 | len = 8; |
| 1061 | cmd = current_monitor->setmem.cmdll; |
| 1062 | } |
| 1063 | else if ((memaddr & 0x3) == 0 && len >= 4 && current_monitor->setmem.cmdl) |
| 1064 | { |
| 1065 | len = 4; |
| 1066 | cmd = current_monitor->setmem.cmdl; |
| 1067 | } |
| 1068 | else if ((memaddr & 0x1) == 0 && len >= 2 && current_monitor->setmem.cmdw) |
| 1069 | { |
| 1070 | len = 2; |
| 1071 | cmd = current_monitor->setmem.cmdw; |
| 1072 | } |
| 1073 | else |
| 1074 | { |
| 1075 | len = 1; |
| 1076 | cmd = current_monitor->setmem.cmdb; |
| 1077 | } |
| 1078 | |
| 1079 | val = extract_unsigned_integer (myaddr, len); |
| 1080 | |
| 1081 | monitor_printf (cmd, memaddr, val); |
| 1082 | |
| 1083 | monitor_expect_prompt (NULL, 0); |
| 1084 | |
| 1085 | return len; |
| 1086 | } |
| 1087 | |
| 1088 | /* This is an alternate form of monitor_read_memory which is used for monitors |
| 1089 | which can only read a single byte/word/etc. at a time. */ |
| 1090 | |
| 1091 | static int |
| 1092 | monitor_read_memory_single (memaddr, myaddr, len) |
| 1093 | CORE_ADDR memaddr; |
| 1094 | char *myaddr; |
| 1095 | int len; |
| 1096 | { |
| 1097 | unsigned int val; |
| 1098 | char membuf[sizeof(int) * 2 + 1]; |
| 1099 | char *p; |
| 1100 | char *cmd; |
| 1101 | int i; |
| 1102 | |
| 1103 | if ((memaddr & 0x7) == 0 && len >= 8 && current_monitor->getmem.cmdll) |
| 1104 | { |
| 1105 | len = 8; |
| 1106 | cmd = current_monitor->getmem.cmdll; |
| 1107 | } |
| 1108 | else if ((memaddr & 0x3) == 0 && len >= 4 && current_monitor->getmem.cmdl) |
| 1109 | { |
| 1110 | len = 4; |
| 1111 | cmd = current_monitor->getmem.cmdl; |
| 1112 | } |
| 1113 | else if ((memaddr & 0x1) == 0 && len >= 2 && current_monitor->getmem.cmdw) |
| 1114 | { |
| 1115 | len = 2; |
| 1116 | cmd = current_monitor->getmem.cmdw; |
| 1117 | } |
| 1118 | else |
| 1119 | { |
| 1120 | len = 1; |
| 1121 | cmd = current_monitor->getmem.cmdb; |
| 1122 | } |
| 1123 | |
| 1124 | /* Send the examine command. */ |
| 1125 | |
| 1126 | monitor_printf (cmd, memaddr); |
| 1127 | |
| 1128 | /* If RESP_DELIM is specified, we search for that as a leading delimiter for |
| 1129 | the register value. Otherwise, we just start searching from the start of |
| 1130 | the buf. */ |
| 1131 | |
| 1132 | if (current_monitor->getmem.resp_delim) |
| 1133 | monitor_expect_regexp (&getmem_resp_delim_pattern, NULL, 0); |
| 1134 | |
| 1135 | /* Now, read the appropriate number of hex digits for this loc, skipping |
| 1136 | spaces. */ |
| 1137 | |
| 1138 | for (i = 0; i < len * 2; i++) |
| 1139 | { |
| 1140 | int c; |
| 1141 | |
| 1142 | while (1) |
| 1143 | { |
| 1144 | c = readchar (timeout); |
| 1145 | if (isxdigit (c)) |
| 1146 | break; |
| 1147 | if (c == ' ') |
| 1148 | continue; |
| 1149 | |
| 1150 | error ("monitor_read_memory_single (0x%x): bad response from monitor: %.*s%c.", |
| 1151 | memaddr, i, membuf, c); |
| 1152 | } |
| 1153 | |
| 1154 | membuf[i] = c; |
| 1155 | } |
| 1156 | |
| 1157 | membuf[i] = '\000'; /* terminate the number */ |
| 1158 | |
| 1159 | /* If TERM is present, we wait for that to show up. Also, (if TERM is |
| 1160 | present), we will send TERM_CMD if that is present. In any case, we collect |
| 1161 | all of the output into buf, and then wait for the normal prompt. */ |
| 1162 | |
| 1163 | if (current_monitor->getmem.term) |
| 1164 | { |
| 1165 | monitor_expect (current_monitor->getmem.term, NULL, 0); /* get response */ |
| 1166 | |
| 1167 | if (current_monitor->getmem.term_cmd) |
| 1168 | { |
| 1169 | monitor_printf (current_monitor->getmem.term_cmd); |
| 1170 | monitor_expect_prompt (NULL, 0); |
| 1171 | } |
| 1172 | } |
| 1173 | else |
| 1174 | monitor_expect_prompt (NULL, 0); /* get response */ |
| 1175 | |
| 1176 | p = membuf; |
| 1177 | val = strtoul (membuf, &p, 16); |
| 1178 | |
| 1179 | if (val == 0 && membuf == p) |
| 1180 | error ("monitor_read_memory_single (0x%x): bad value from monitor: %s.", |
| 1181 | memaddr, membuf); |
| 1182 | |
| 1183 | /* supply register stores in target byte order, so swap here */ |
| 1184 | |
| 1185 | store_unsigned_integer (myaddr, len, val); |
| 1186 | |
| 1187 | return len; |
| 1188 | } |
| 1189 | |
| 1190 | /* Copy LEN bytes of data from debugger memory at MYADDR to inferior's memory |
| 1191 | at MEMADDR. Returns length moved. Currently, we only do one byte at a |
| 1192 | time. */ |
| 1193 | |
| 1194 | static int |
| 1195 | monitor_read_memory (memaddr, myaddr, len) |
| 1196 | CORE_ADDR memaddr; |
| 1197 | char *myaddr; |
| 1198 | int len; |
| 1199 | { |
| 1200 | unsigned int val; |
| 1201 | unsigned char regbuf[MAX_REGISTER_RAW_SIZE]; |
| 1202 | char buf[512]; |
| 1203 | char *p, *p1; |
| 1204 | char *name; |
| 1205 | int resp_len; |
| 1206 | int i; |
| 1207 | |
| 1208 | if (current_monitor->flags & MO_GETMEM_READ_SINGLE) |
| 1209 | return monitor_read_memory_single (memaddr, myaddr, len); |
| 1210 | |
| 1211 | len = min (len, 16); |
| 1212 | |
| 1213 | /* See if xfer would cross a 16 byte boundary. If so, clip it. */ |
| 1214 | if (((memaddr ^ (memaddr + len - 1)) & ~0xf) != 0) |
| 1215 | len = ((memaddr + len) & ~0xf) - memaddr; |
| 1216 | |
| 1217 | /* send the memory examine command */ |
| 1218 | |
| 1219 | if (current_monitor->flags & MO_GETMEM_NEEDS_RANGE) |
| 1220 | monitor_printf (current_monitor->getmem.cmdb, memaddr, memaddr + len - 1); |
| 1221 | else |
| 1222 | monitor_printf (current_monitor->getmem.cmdb, memaddr, len); |
| 1223 | |
| 1224 | /* If TERM is present, we wait for that to show up. Also, (if TERM is |
| 1225 | present), we will send TERM_CMD if that is present. In any case, we collect |
| 1226 | all of the output into buf, and then wait for the normal prompt. */ |
| 1227 | |
| 1228 | if (current_monitor->getmem.term) |
| 1229 | { |
| 1230 | resp_len = monitor_expect (current_monitor->getmem.term, buf, sizeof buf); /* get response */ |
| 1231 | |
| 1232 | if (resp_len <= 0) |
| 1233 | error ("monitor_read_memory (0x%x): excessive response from monitor: %.*s.", |
| 1234 | memaddr, resp_len, buf); |
| 1235 | |
| 1236 | if (current_monitor->getmem.term_cmd) |
| 1237 | { |
| 1238 | SERIAL_WRITE (monitor_desc, current_monitor->getmem.term_cmd, |
| 1239 | strlen (current_monitor->getmem.term_cmd)); |
| 1240 | monitor_expect_prompt (NULL, 0); |
| 1241 | } |
| 1242 | } |
| 1243 | else |
| 1244 | resp_len = monitor_expect_prompt (buf, sizeof buf); /* get response */ |
| 1245 | |
| 1246 | p = buf; |
| 1247 | |
| 1248 | /* If RESP_DELIM is specified, we search for that as a leading delimiter for |
| 1249 | the values. Otherwise, we just start searching from the start of the buf. |
| 1250 | */ |
| 1251 | |
| 1252 | if (current_monitor->getmem.resp_delim) |
| 1253 | { |
| 1254 | int retval, tmp; |
| 1255 | struct re_registers resp_strings; |
| 1256 | |
| 1257 | tmp = strlen (p); |
| 1258 | retval = re_search (&getmem_resp_delim_pattern, p, tmp, 0, tmp, |
| 1259 | &resp_strings); |
| 1260 | |
| 1261 | if (retval < 0) |
| 1262 | error ("monitor_read_memory (0x%x): bad response from monitor: %.*s.", |
| 1263 | memaddr, resp_len, buf); |
| 1264 | |
| 1265 | p += resp_strings.end[0]; |
| 1266 | #if 0 |
| 1267 | p = strstr (p, current_monitor->getmem.resp_delim); |
| 1268 | if (!p) |
| 1269 | error ("monitor_read_memory (0x%x): bad response from monitor: %.*s.", |
| 1270 | memaddr, resp_len, buf); |
| 1271 | p += strlen (current_monitor->getmem.resp_delim); |
| 1272 | #endif |
| 1273 | } |
| 1274 | |
| 1275 | for (i = len; i > 0; i--) |
| 1276 | { |
| 1277 | /* Skip non-hex chars, but bomb on end of string and newlines */ |
| 1278 | |
| 1279 | while (1) |
| 1280 | { |
| 1281 | if (isxdigit (*p)) |
| 1282 | break; |
| 1283 | if (*p == '\000' || *p == '\n' || *p == '\r') |
| 1284 | error ("monitor_read_memory (0x%x): badly terminated response from monitor: %.*s", memaddr, resp_len, buf); |
| 1285 | p++; |
| 1286 | } |
| 1287 | |
| 1288 | val = strtoul (p, &p1, 16); |
| 1289 | |
| 1290 | if (val == 0 && p == p1) |
| 1291 | error ("monitor_read_memory (0x%x): bad value from monitor: %.*s.", memaddr, |
| 1292 | resp_len, buf); |
| 1293 | |
| 1294 | *myaddr++ = val; |
| 1295 | |
| 1296 | if (i == 1) |
| 1297 | break; |
| 1298 | |
| 1299 | p = p1; |
| 1300 | } |
| 1301 | |
| 1302 | return len; |
| 1303 | } |
| 1304 | |
| 1305 | static int |
| 1306 | monitor_xfer_memory (memaddr, myaddr, len, write, target) |
| 1307 | CORE_ADDR memaddr; |
| 1308 | char *myaddr; |
| 1309 | int len; |
| 1310 | int write; |
| 1311 | struct target_ops *target; /* ignored */ |
| 1312 | { |
| 1313 | return dcache_xfer_memory (remote_dcache, memaddr, myaddr, len, write); |
| 1314 | } |
| 1315 | |
| 1316 | static void |
| 1317 | monitor_kill () |
| 1318 | { |
| 1319 | return; /* ignore attempts to kill target system */ |
| 1320 | } |
| 1321 | |
| 1322 | /* All we actually do is set the PC to the start address of exec_bfd, and start |
| 1323 | the program at that point. */ |
| 1324 | |
| 1325 | static void |
| 1326 | monitor_create_inferior (exec_file, args, env) |
| 1327 | char *exec_file; |
| 1328 | char *args; |
| 1329 | char **env; |
| 1330 | { |
| 1331 | if (args && (*args != '\000')) |
| 1332 | error ("Args are not supported by the monitor."); |
| 1333 | |
| 1334 | clear_proceed_status (); |
| 1335 | proceed (bfd_get_start_address (exec_bfd), TARGET_SIGNAL_0, 0); |
| 1336 | } |
| 1337 | |
| 1338 | /* Clean up when a program exits. |
| 1339 | The program actually lives on in the remote processor's RAM, and may be |
| 1340 | run again without a download. Don't leave it full of breakpoint |
| 1341 | instructions. */ |
| 1342 | |
| 1343 | static void |
| 1344 | monitor_mourn_inferior () |
| 1345 | { |
| 1346 | unpush_target (targ_ops); |
| 1347 | generic_mourn_inferior (); /* Do all the proper things now */ |
| 1348 | } |
| 1349 | |
| 1350 | #define NUM_MONITOR_BREAKPOINTS 8 |
| 1351 | |
| 1352 | static CORE_ADDR breakaddr[NUM_MONITOR_BREAKPOINTS] = {0}; |
| 1353 | |
| 1354 | /* Tell the monitor to add a breakpoint. */ |
| 1355 | |
| 1356 | static int |
| 1357 | monitor_insert_breakpoint (addr, shadow) |
| 1358 | CORE_ADDR addr; |
| 1359 | char *shadow; |
| 1360 | { |
| 1361 | int i; |
| 1362 | static unsigned char break_insn[] = BREAKPOINT; |
| 1363 | |
| 1364 | for (i = 0; i < NUM_MONITOR_BREAKPOINTS; i++) |
| 1365 | { |
| 1366 | if (breakaddr[i] == 0) |
| 1367 | { |
| 1368 | breakaddr[i] = addr; |
| 1369 | monitor_read_memory (addr, shadow, sizeof (break_insn)); |
| 1370 | monitor_printf (current_monitor->set_break, addr); |
| 1371 | monitor_expect_prompt (NULL, 0); |
| 1372 | return 0; |
| 1373 | } |
| 1374 | } |
| 1375 | |
| 1376 | error ("Too many breakpoints (> %d) for monitor.", NUM_MONITOR_BREAKPOINTS); |
| 1377 | } |
| 1378 | |
| 1379 | /* Tell the monitor to remove a breakpoint. */ |
| 1380 | |
| 1381 | static int |
| 1382 | monitor_remove_breakpoint (addr, shadow) |
| 1383 | CORE_ADDR addr; |
| 1384 | char *shadow; |
| 1385 | { |
| 1386 | int i; |
| 1387 | |
| 1388 | for (i = 0; i < NUM_MONITOR_BREAKPOINTS; i++) |
| 1389 | { |
| 1390 | if (breakaddr[i] == addr) |
| 1391 | { |
| 1392 | breakaddr[i] = 0; |
| 1393 | /* some monitors remove breakpoints based on the address */ |
| 1394 | if (current_monitor->flags & MO_CLR_BREAK_USES_ADDR) |
| 1395 | monitor_printf (current_monitor->clr_break, addr); |
| 1396 | else |
| 1397 | monitor_printf (current_monitor->clr_break, i); |
| 1398 | monitor_expect_prompt (NULL, 0); |
| 1399 | return 0; |
| 1400 | } |
| 1401 | } |
| 1402 | fprintf_unfiltered (stderr, "Can't find breakpoint associated with 0x%x\n", addr); |
| 1403 | return 1; |
| 1404 | } |
| 1405 | |
| 1406 | /* monitor_wait_srec_ack -- wait for the target to send an acknowledgement for |
| 1407 | an S-record. Return non-zero if the ACK is received properly. */ |
| 1408 | |
| 1409 | static int |
| 1410 | monitor_wait_srec_ack () |
| 1411 | { |
| 1412 | /* FIXME: eventually we'll want to be able to handle acknowledgements |
| 1413 | of something other than a '+' character. Right now this is only |
| 1414 | going to work for EST visionICE. */ |
| 1415 | return readchar (timeout) == '+'; |
| 1416 | } |
| 1417 | |
| 1418 | /* monitor_load -- download a file. */ |
| 1419 | |
| 1420 | static void |
| 1421 | monitor_load (file, from_tty) |
| 1422 | char *file; |
| 1423 | int from_tty; |
| 1424 | { |
| 1425 | dcache_flush (remote_dcache); |
| 1426 | |
| 1427 | if (current_monitor->load_routine) |
| 1428 | current_monitor->load_routine (monitor_desc, file, hashmark); |
| 1429 | else |
| 1430 | { /* The default is ascii S-records */ |
| 1431 | monitor_printf (current_monitor->load); |
| 1432 | if (current_monitor->loadresp) |
| 1433 | monitor_expect (current_monitor->loadresp, NULL, 0); |
| 1434 | |
| 1435 | load_srec (monitor_desc, file, 32, SREC_ALL, hashmark, |
| 1436 | current_monitor->flags & MO_SREC_ACK ? |
| 1437 | monitor_wait_srec_ack : NULL); |
| 1438 | |
| 1439 | monitor_expect_prompt (NULL, 0); |
| 1440 | } |
| 1441 | |
| 1442 | /* Finally, make the PC point at the start address */ |
| 1443 | |
| 1444 | if (exec_bfd) |
| 1445 | write_pc (bfd_get_start_address (exec_bfd)); |
| 1446 | |
| 1447 | inferior_pid = 0; /* No process now */ |
| 1448 | |
| 1449 | /* This is necessary because many things were based on the PC at the time that |
| 1450 | we attached to the monitor, which is no longer valid now that we have loaded |
| 1451 | new code (and just changed the PC). Another way to do this might be to call |
| 1452 | normal_stop, except that the stack may not be valid, and things would get |
| 1453 | horribly confused... */ |
| 1454 | |
| 1455 | clear_symtab_users (); |
| 1456 | } |
| 1457 | |
| 1458 | static void |
| 1459 | monitor_stop () |
| 1460 | { |
| 1461 | if ((current_monitor->flags & MO_SEND_BREAK_ON_STOP) != 0) |
| 1462 | SERIAL_SEND_BREAK (monitor_desc); |
| 1463 | if (current_monitor->stop) |
| 1464 | monitor_printf_noecho (current_monitor->stop); |
| 1465 | } |
| 1466 | |
| 1467 | /* Put a command string, in args, out to MONITOR. Output from MONITOR |
| 1468 | is placed on the users terminal until the prompt is seen. FIXME: We |
| 1469 | read the characters ourseleves here cause of a nasty echo. */ |
| 1470 | |
| 1471 | static void |
| 1472 | monitor_command (args, from_tty) |
| 1473 | char *args; |
| 1474 | int from_tty; |
| 1475 | { |
| 1476 | char *p; |
| 1477 | int resp_len; |
| 1478 | char buf[1000]; |
| 1479 | |
| 1480 | if (monitor_desc == NULL) |
| 1481 | error ("monitor target not open."); |
| 1482 | |
| 1483 | p = current_monitor->prompt; |
| 1484 | |
| 1485 | /* Send the command. Note that if no args were supplied, then we're |
| 1486 | just sending the monitor a newline, which is sometimes useful. */ |
| 1487 | |
| 1488 | monitor_printf ("%s\r", (args ? args : "")); |
| 1489 | |
| 1490 | resp_len = monitor_expect_prompt (buf, sizeof buf); |
| 1491 | |
| 1492 | fputs_unfiltered (buf, gdb_stdout); /* Output the response */ |
| 1493 | } |
| 1494 | |
| 1495 | /* Convert hex digit A to a number. */ |
| 1496 | |
| 1497 | static int |
| 1498 | from_hex (a) |
| 1499 | int a; |
| 1500 | { |
| 1501 | if (a >= '0' && a <= '9') |
| 1502 | return a - '0'; |
| 1503 | if (a >= 'a' && a <= 'f') |
| 1504 | return a - 'a' + 10; |
| 1505 | if (a >= 'A' && a <= 'F') |
| 1506 | return a - 'A' + 10; |
| 1507 | |
| 1508 | error ("Reply contains invalid hex digit 0x%x", a); |
| 1509 | } |
| 1510 | |
| 1511 | static struct target_ops monitor_ops = |
| 1512 | { |
| 1513 | NULL, /* to_shortname */ |
| 1514 | NULL, /* to_longname */ |
| 1515 | NULL, /* to_doc */ |
| 1516 | NULL, /* to_open */ |
| 1517 | monitor_close, /* to_close */ |
| 1518 | NULL, /* to_attach */ |
| 1519 | monitor_detach, /* to_detach */ |
| 1520 | monitor_resume, /* to_resume */ |
| 1521 | monitor_wait, /* to_wait */ |
| 1522 | monitor_fetch_registers, /* to_fetch_registers */ |
| 1523 | monitor_store_registers, /* to_store_registers */ |
| 1524 | monitor_prepare_to_store, /* to_prepare_to_store */ |
| 1525 | monitor_xfer_memory, /* to_xfer_memory */ |
| 1526 | monitor_files_info, /* to_files_info */ |
| 1527 | monitor_insert_breakpoint, /* to_insert_breakpoint */ |
| 1528 | monitor_remove_breakpoint, /* to_remove_breakpoint */ |
| 1529 | 0, /* to_terminal_init */ |
| 1530 | 0, /* to_terminal_inferior */ |
| 1531 | 0, /* to_terminal_ours_for_output */ |
| 1532 | 0, /* to_terminal_ours */ |
| 1533 | 0, /* to_terminal_info */ |
| 1534 | monitor_kill, /* to_kill */ |
| 1535 | monitor_load, /* to_load */ |
| 1536 | 0, /* to_lookup_symbol */ |
| 1537 | monitor_create_inferior, /* to_create_inferior */ |
| 1538 | monitor_mourn_inferior, /* to_mourn_inferior */ |
| 1539 | 0, /* to_can_run */ |
| 1540 | 0, /* to_notice_signals */ |
| 1541 | 0, /* to_thread_alive */ |
| 1542 | monitor_stop, /* to_stop */ |
| 1543 | process_stratum, /* to_stratum */ |
| 1544 | 0, /* to_next */ |
| 1545 | 1, /* to_has_all_memory */ |
| 1546 | 1, /* to_has_memory */ |
| 1547 | 1, /* to_has_stack */ |
| 1548 | 1, /* to_has_registers */ |
| 1549 | 1, /* to_has_execution */ |
| 1550 | 0, /* sections */ |
| 1551 | 0, /* sections_end */ |
| 1552 | OPS_MAGIC /* to_magic */ |
| 1553 | }; |
| 1554 | |
| 1555 | /* Init the target_ops structure pointed at by OPS */ |
| 1556 | |
| 1557 | void |
| 1558 | init_monitor_ops (ops) |
| 1559 | struct target_ops *ops; |
| 1560 | { |
| 1561 | memcpy (ops, &monitor_ops, sizeof monitor_ops); |
| 1562 | } |
| 1563 | |
| 1564 | /* Define additional commands that are usually only used by monitors. */ |
| 1565 | |
| 1566 | void |
| 1567 | _initialize_remote_monitors () |
| 1568 | { |
| 1569 | add_show_from_set (add_set_cmd ("hash", no_class, var_boolean, |
| 1570 | (char *)&hashmark, |
| 1571 | "Set display of activity while downloading a file.\n\ |
| 1572 | When enabled, a hashmark \'#\' is displayed.", |
| 1573 | &setlist), |
| 1574 | &showlist); |
| 1575 | |
| 1576 | add_com ("monitor", class_obscure, monitor_command, |
| 1577 | "Send a command to the debug monitor."); |
| 1578 | } |