| 1 | /* Remote debugging interface for boot monitors, for GDB. |
| 2 | |
| 3 | Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 4 | 2000, 2001, 2002, 2006, 2007 Free Software Foundation, Inc. |
| 5 | |
| 6 | Contributed by Cygnus Support. Written by Rob Savoye for Cygnus. |
| 7 | Resurrected from the ashes by Stu Grossman. |
| 8 | |
| 9 | This file is part of GDB. |
| 10 | |
| 11 | This program is free software; you can redistribute it and/or modify |
| 12 | it under the terms of the GNU General Public License as published by |
| 13 | the Free Software Foundation; either version 2 of the License, or |
| 14 | (at your option) any later version. |
| 15 | |
| 16 | This program is distributed in the hope that it will be useful, |
| 17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | GNU General Public License for more details. |
| 20 | |
| 21 | You should have received a copy of the GNU General Public License |
| 22 | along with this program; if not, write to the Free Software |
| 23 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 24 | Boston, MA 02110-1301, USA. */ |
| 25 | |
| 26 | /* This file was derived from various remote-* modules. It is a collection |
| 27 | of generic support functions so GDB can talk directly to a ROM based |
| 28 | monitor. This saves use from having to hack an exception based handler |
| 29 | into existence, and makes for quick porting. |
| 30 | |
| 31 | This module talks to a debug monitor called 'MONITOR', which |
| 32 | We communicate with MONITOR via either a direct serial line, or a TCP |
| 33 | (or possibly TELNET) stream to a terminal multiplexor, |
| 34 | which in turn talks to the target board. */ |
| 35 | |
| 36 | /* FIXME 32x64: This code assumes that registers and addresses are at |
| 37 | most 32 bits long. If they can be larger, you will need to declare |
| 38 | values as LONGEST and use %llx or some such to print values when |
| 39 | building commands to send to the monitor. Since we don't know of |
| 40 | any actual 64-bit targets with ROM monitors that use this code, |
| 41 | it's not an issue right now. -sts 4/18/96 */ |
| 42 | |
| 43 | #include "defs.h" |
| 44 | #include "gdbcore.h" |
| 45 | #include "target.h" |
| 46 | #include "exceptions.h" |
| 47 | #include <signal.h> |
| 48 | #include <ctype.h> |
| 49 | #include "gdb_string.h" |
| 50 | #include <sys/types.h> |
| 51 | #include "command.h" |
| 52 | #include "serial.h" |
| 53 | #include "monitor.h" |
| 54 | #include "gdbcmd.h" |
| 55 | #include "inferior.h" |
| 56 | #include "gdb_regex.h" |
| 57 | #include "srec.h" |
| 58 | #include "regcache.h" |
| 59 | |
| 60 | static char *dev_name; |
| 61 | static struct target_ops *targ_ops; |
| 62 | |
| 63 | static void monitor_interrupt_query (void); |
| 64 | static void monitor_interrupt_twice (int); |
| 65 | static void monitor_stop (void); |
| 66 | static void monitor_dump_regs (struct regcache *regcache); |
| 67 | |
| 68 | #if 0 |
| 69 | static int from_hex (int a); |
| 70 | #endif |
| 71 | |
| 72 | static struct monitor_ops *current_monitor; |
| 73 | |
| 74 | static int hashmark; /* flag set by "set hash" */ |
| 75 | |
| 76 | static int timeout = 30; |
| 77 | |
| 78 | static int in_monitor_wait = 0; /* Non-zero means we are in monitor_wait() */ |
| 79 | |
| 80 | static void (*ofunc) (); /* Old SIGINT signal handler */ |
| 81 | |
| 82 | static CORE_ADDR *breakaddr; |
| 83 | |
| 84 | /* Descriptor for I/O to remote machine. Initialize it to NULL so |
| 85 | that monitor_open knows that we don't have a file open when the |
| 86 | program starts. */ |
| 87 | |
| 88 | static struct serial *monitor_desc = NULL; |
| 89 | |
| 90 | /* Pointer to regexp pattern matching data */ |
| 91 | |
| 92 | static struct re_pattern_buffer register_pattern; |
| 93 | static char register_fastmap[256]; |
| 94 | |
| 95 | static struct re_pattern_buffer getmem_resp_delim_pattern; |
| 96 | static char getmem_resp_delim_fastmap[256]; |
| 97 | |
| 98 | static struct re_pattern_buffer setmem_resp_delim_pattern; |
| 99 | static char setmem_resp_delim_fastmap[256]; |
| 100 | |
| 101 | static struct re_pattern_buffer setreg_resp_delim_pattern; |
| 102 | static char setreg_resp_delim_fastmap[256]; |
| 103 | |
| 104 | static int dump_reg_flag; /* Non-zero means do a dump_registers cmd when |
| 105 | monitor_wait wakes up. */ |
| 106 | |
| 107 | static int first_time = 0; /* is this the first time we're executing after |
| 108 | gaving created the child proccess? */ |
| 109 | |
| 110 | #define TARGET_BUF_SIZE 2048 |
| 111 | |
| 112 | /* Monitor specific debugging information. Typically only useful to |
| 113 | the developer of a new monitor interface. */ |
| 114 | |
| 115 | static void monitor_debug (const char *fmt, ...) ATTR_FORMAT(printf, 1, 2); |
| 116 | |
| 117 | static int monitor_debug_p = 0; |
| 118 | |
| 119 | /* NOTE: This file alternates between monitor_debug_p and remote_debug |
| 120 | when determining if debug information is printed. Perhaps this |
| 121 | could be simplified. */ |
| 122 | |
| 123 | static void |
| 124 | monitor_debug (const char *fmt, ...) |
| 125 | { |
| 126 | if (monitor_debug_p) |
| 127 | { |
| 128 | va_list args; |
| 129 | va_start (args, fmt); |
| 130 | vfprintf_filtered (gdb_stdlog, fmt, args); |
| 131 | va_end (args); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | |
| 136 | /* Convert a string into a printable representation, Return # byte in |
| 137 | the new string. When LEN is >0 it specifies the size of the |
| 138 | string. Otherwize strlen(oldstr) is used. */ |
| 139 | |
| 140 | static void |
| 141 | monitor_printable_string (char *newstr, char *oldstr, int len) |
| 142 | { |
| 143 | int ch; |
| 144 | int i; |
| 145 | |
| 146 | if (len <= 0) |
| 147 | len = strlen (oldstr); |
| 148 | |
| 149 | for (i = 0; i < len; i++) |
| 150 | { |
| 151 | ch = oldstr[i]; |
| 152 | switch (ch) |
| 153 | { |
| 154 | default: |
| 155 | if (isprint (ch)) |
| 156 | *newstr++ = ch; |
| 157 | |
| 158 | else |
| 159 | { |
| 160 | sprintf (newstr, "\\x%02x", ch & 0xff); |
| 161 | newstr += 4; |
| 162 | } |
| 163 | break; |
| 164 | |
| 165 | case '\\': |
| 166 | *newstr++ = '\\'; |
| 167 | *newstr++ = '\\'; |
| 168 | break; |
| 169 | case '\b': |
| 170 | *newstr++ = '\\'; |
| 171 | *newstr++ = 'b'; |
| 172 | break; |
| 173 | case '\f': |
| 174 | *newstr++ = '\\'; |
| 175 | *newstr++ = 't'; |
| 176 | break; |
| 177 | case '\n': |
| 178 | *newstr++ = '\\'; |
| 179 | *newstr++ = 'n'; |
| 180 | break; |
| 181 | case '\r': |
| 182 | *newstr++ = '\\'; |
| 183 | *newstr++ = 'r'; |
| 184 | break; |
| 185 | case '\t': |
| 186 | *newstr++ = '\\'; |
| 187 | *newstr++ = 't'; |
| 188 | break; |
| 189 | case '\v': |
| 190 | *newstr++ = '\\'; |
| 191 | *newstr++ = 'v'; |
| 192 | break; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | *newstr++ = '\0'; |
| 197 | } |
| 198 | |
| 199 | /* Print monitor errors with a string, converting the string to printable |
| 200 | representation. */ |
| 201 | |
| 202 | static void |
| 203 | monitor_error (char *function, char *message, |
| 204 | CORE_ADDR memaddr, int len, char *string, int final_char) |
| 205 | { |
| 206 | int real_len = (len == 0 && string != (char *) 0) ? strlen (string) : len; |
| 207 | char *safe_string = alloca ((real_len * 4) + 1); |
| 208 | monitor_printable_string (safe_string, string, real_len); |
| 209 | |
| 210 | if (final_char) |
| 211 | error (_("%s (0x%s): %s: %s%c"), function, paddr_nz (memaddr), message, safe_string, final_char); |
| 212 | else |
| 213 | error (_("%s (0x%s): %s: %s"), function, paddr_nz (memaddr), message, safe_string); |
| 214 | } |
| 215 | |
| 216 | /* Convert hex digit A to a number. */ |
| 217 | |
| 218 | static int |
| 219 | fromhex (int a) |
| 220 | { |
| 221 | if (a >= '0' && a <= '9') |
| 222 | return a - '0'; |
| 223 | else if (a >= 'a' && a <= 'f') |
| 224 | return a - 'a' + 10; |
| 225 | else if (a >= 'A' && a <= 'F') |
| 226 | return a - 'A' + 10; |
| 227 | else |
| 228 | error (_("Invalid hex digit %d"), a); |
| 229 | } |
| 230 | |
| 231 | /* monitor_vsprintf - similar to vsprintf but handles 64-bit addresses |
| 232 | |
| 233 | This function exists to get around the problem that many host platforms |
| 234 | don't have a printf that can print 64-bit addresses. The %A format |
| 235 | specification is recognized as a special case, and causes the argument |
| 236 | to be printed as a 64-bit hexadecimal address. |
| 237 | |
| 238 | Only format specifiers of the form "[0-9]*[a-z]" are recognized. |
| 239 | If it is a '%s' format, the argument is a string; otherwise the |
| 240 | argument is assumed to be a long integer. |
| 241 | |
| 242 | %% is also turned into a single %. |
| 243 | */ |
| 244 | |
| 245 | static void |
| 246 | monitor_vsprintf (char *sndbuf, char *pattern, va_list args) |
| 247 | { |
| 248 | char format[10]; |
| 249 | char fmt; |
| 250 | char *p; |
| 251 | int i; |
| 252 | long arg_int; |
| 253 | CORE_ADDR arg_addr; |
| 254 | char *arg_string; |
| 255 | |
| 256 | for (p = pattern; *p; p++) |
| 257 | { |
| 258 | if (*p == '%') |
| 259 | { |
| 260 | /* Copy the format specifier to a separate buffer. */ |
| 261 | format[0] = *p++; |
| 262 | for (i = 1; *p >= '0' && *p <= '9' && i < (int) sizeof (format) - 2; |
| 263 | i++, p++) |
| 264 | format[i] = *p; |
| 265 | format[i] = fmt = *p; |
| 266 | format[i + 1] = '\0'; |
| 267 | |
| 268 | /* Fetch the next argument and print it. */ |
| 269 | switch (fmt) |
| 270 | { |
| 271 | case '%': |
| 272 | strcpy (sndbuf, "%"); |
| 273 | break; |
| 274 | case 'A': |
| 275 | arg_addr = va_arg (args, CORE_ADDR); |
| 276 | strcpy (sndbuf, paddr_nz (arg_addr)); |
| 277 | break; |
| 278 | case 's': |
| 279 | arg_string = va_arg (args, char *); |
| 280 | sprintf (sndbuf, format, arg_string); |
| 281 | break; |
| 282 | default: |
| 283 | arg_int = va_arg (args, long); |
| 284 | sprintf (sndbuf, format, arg_int); |
| 285 | break; |
| 286 | } |
| 287 | sndbuf += strlen (sndbuf); |
| 288 | } |
| 289 | else |
| 290 | *sndbuf++ = *p; |
| 291 | } |
| 292 | *sndbuf = '\0'; |
| 293 | } |
| 294 | |
| 295 | |
| 296 | /* monitor_printf_noecho -- Send data to monitor, but don't expect an echo. |
| 297 | Works just like printf. */ |
| 298 | |
| 299 | void |
| 300 | monitor_printf_noecho (char *pattern,...) |
| 301 | { |
| 302 | va_list args; |
| 303 | char sndbuf[2000]; |
| 304 | int len; |
| 305 | |
| 306 | va_start (args, pattern); |
| 307 | |
| 308 | monitor_vsprintf (sndbuf, pattern, args); |
| 309 | |
| 310 | len = strlen (sndbuf); |
| 311 | if (len + 1 > sizeof sndbuf) |
| 312 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
| 313 | |
| 314 | if (monitor_debug_p) |
| 315 | { |
| 316 | char *safe_string = (char *) alloca ((strlen (sndbuf) * 4) + 1); |
| 317 | monitor_printable_string (safe_string, sndbuf, 0); |
| 318 | fprintf_unfiltered (gdb_stdlog, "sent[%s]\n", safe_string); |
| 319 | } |
| 320 | |
| 321 | monitor_write (sndbuf, len); |
| 322 | } |
| 323 | |
| 324 | /* monitor_printf -- Send data to monitor and check the echo. Works just like |
| 325 | printf. */ |
| 326 | |
| 327 | void |
| 328 | monitor_printf (char *pattern,...) |
| 329 | { |
| 330 | va_list args; |
| 331 | char sndbuf[2000]; |
| 332 | int len; |
| 333 | |
| 334 | va_start (args, pattern); |
| 335 | |
| 336 | monitor_vsprintf (sndbuf, pattern, args); |
| 337 | |
| 338 | len = strlen (sndbuf); |
| 339 | if (len + 1 > sizeof sndbuf) |
| 340 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
| 341 | |
| 342 | if (monitor_debug_p) |
| 343 | { |
| 344 | char *safe_string = (char *) alloca ((len * 4) + 1); |
| 345 | monitor_printable_string (safe_string, sndbuf, 0); |
| 346 | fprintf_unfiltered (gdb_stdlog, "sent[%s]\n", safe_string); |
| 347 | } |
| 348 | |
| 349 | monitor_write (sndbuf, len); |
| 350 | |
| 351 | /* We used to expect that the next immediate output was the characters we |
| 352 | just output, but sometimes some extra junk appeared before the characters |
| 353 | we expected, like an extra prompt, or a portmaster sending telnet negotiations. |
| 354 | So, just start searching for what we sent, and skip anything unknown. */ |
| 355 | monitor_debug ("ExpectEcho\n"); |
| 356 | monitor_expect (sndbuf, (char *) 0, 0); |
| 357 | } |
| 358 | |
| 359 | |
| 360 | /* Write characters to the remote system. */ |
| 361 | |
| 362 | void |
| 363 | monitor_write (char *buf, int buflen) |
| 364 | { |
| 365 | if (serial_write (monitor_desc, buf, buflen)) |
| 366 | fprintf_unfiltered (gdb_stderr, "serial_write failed: %s\n", |
| 367 | safe_strerror (errno)); |
| 368 | } |
| 369 | |
| 370 | |
| 371 | /* Read a binary character from the remote system, doing all the fancy |
| 372 | timeout stuff, but without interpreting the character in any way, |
| 373 | and without printing remote debug information. */ |
| 374 | |
| 375 | int |
| 376 | monitor_readchar (void) |
| 377 | { |
| 378 | int c; |
| 379 | int looping; |
| 380 | |
| 381 | do |
| 382 | { |
| 383 | looping = 0; |
| 384 | c = serial_readchar (monitor_desc, timeout); |
| 385 | |
| 386 | if (c >= 0) |
| 387 | c &= 0xff; /* don't lose bit 7 */ |
| 388 | } |
| 389 | while (looping); |
| 390 | |
| 391 | if (c >= 0) |
| 392 | return c; |
| 393 | |
| 394 | if (c == SERIAL_TIMEOUT) |
| 395 | error (_("Timeout reading from remote system.")); |
| 396 | |
| 397 | perror_with_name (_("remote-monitor")); |
| 398 | } |
| 399 | |
| 400 | |
| 401 | /* Read a character from the remote system, doing all the fancy |
| 402 | timeout stuff. */ |
| 403 | |
| 404 | static int |
| 405 | readchar (int timeout) |
| 406 | { |
| 407 | int c; |
| 408 | static enum |
| 409 | { |
| 410 | last_random, last_nl, last_cr, last_crnl |
| 411 | } |
| 412 | state = last_random; |
| 413 | int looping; |
| 414 | |
| 415 | do |
| 416 | { |
| 417 | looping = 0; |
| 418 | c = serial_readchar (monitor_desc, timeout); |
| 419 | |
| 420 | if (c >= 0) |
| 421 | { |
| 422 | c &= 0x7f; |
| 423 | /* This seems to interfere with proper function of the |
| 424 | input stream */ |
| 425 | if (monitor_debug_p || remote_debug) |
| 426 | { |
| 427 | char buf[2]; |
| 428 | buf[0] = c; |
| 429 | buf[1] = '\0'; |
| 430 | puts_debug ("read -->", buf, "<--"); |
| 431 | } |
| 432 | |
| 433 | } |
| 434 | |
| 435 | /* Canonicialize \n\r combinations into one \r */ |
| 436 | if ((current_monitor->flags & MO_HANDLE_NL) != 0) |
| 437 | { |
| 438 | if ((c == '\r' && state == last_nl) |
| 439 | || (c == '\n' && state == last_cr)) |
| 440 | { |
| 441 | state = last_crnl; |
| 442 | looping = 1; |
| 443 | } |
| 444 | else if (c == '\r') |
| 445 | state = last_cr; |
| 446 | else if (c != '\n') |
| 447 | state = last_random; |
| 448 | else |
| 449 | { |
| 450 | state = last_nl; |
| 451 | c = '\r'; |
| 452 | } |
| 453 | } |
| 454 | } |
| 455 | while (looping); |
| 456 | |
| 457 | if (c >= 0) |
| 458 | return c; |
| 459 | |
| 460 | if (c == SERIAL_TIMEOUT) |
| 461 | #if 0 |
| 462 | /* I fail to see how detaching here can be useful */ |
| 463 | if (in_monitor_wait) /* Watchdog went off */ |
| 464 | { |
| 465 | target_mourn_inferior (); |
| 466 | error (_("GDB serial timeout has expired. Target detached.")); |
| 467 | } |
| 468 | else |
| 469 | #endif |
| 470 | error (_("Timeout reading from remote system.")); |
| 471 | |
| 472 | perror_with_name (_("remote-monitor")); |
| 473 | } |
| 474 | |
| 475 | /* Scan input from the remote system, until STRING is found. If BUF is non- |
| 476 | zero, then collect input until we have collected either STRING or BUFLEN-1 |
| 477 | chars. In either case we terminate BUF with a 0. If input overflows BUF |
| 478 | because STRING can't be found, return -1, else return number of chars in BUF |
| 479 | (minus the terminating NUL). Note that in the non-overflow case, STRING |
| 480 | will be at the end of BUF. */ |
| 481 | |
| 482 | int |
| 483 | monitor_expect (char *string, char *buf, int buflen) |
| 484 | { |
| 485 | char *p = string; |
| 486 | int obuflen = buflen; |
| 487 | int c; |
| 488 | |
| 489 | if (monitor_debug_p) |
| 490 | { |
| 491 | char *safe_string = (char *) alloca ((strlen (string) * 4) + 1); |
| 492 | monitor_printable_string (safe_string, string, 0); |
| 493 | fprintf_unfiltered (gdb_stdlog, "MON Expecting '%s'\n", safe_string); |
| 494 | } |
| 495 | |
| 496 | immediate_quit++; |
| 497 | while (1) |
| 498 | { |
| 499 | if (buf) |
| 500 | { |
| 501 | if (buflen < 2) |
| 502 | { |
| 503 | *buf = '\000'; |
| 504 | immediate_quit--; |
| 505 | return -1; |
| 506 | } |
| 507 | |
| 508 | c = readchar (timeout); |
| 509 | if (c == '\000') |
| 510 | continue; |
| 511 | *buf++ = c; |
| 512 | buflen--; |
| 513 | } |
| 514 | else |
| 515 | c = readchar (timeout); |
| 516 | |
| 517 | /* Don't expect any ^C sent to be echoed */ |
| 518 | |
| 519 | if (*p == '\003' || c == *p) |
| 520 | { |
| 521 | p++; |
| 522 | if (*p == '\0') |
| 523 | { |
| 524 | immediate_quit--; |
| 525 | |
| 526 | if (buf) |
| 527 | { |
| 528 | *buf++ = '\000'; |
| 529 | return obuflen - buflen; |
| 530 | } |
| 531 | else |
| 532 | return 0; |
| 533 | } |
| 534 | } |
| 535 | else |
| 536 | { |
| 537 | /* We got a character that doesn't match the string. We need to |
| 538 | back up p, but how far? If we're looking for "..howdy" and the |
| 539 | monitor sends "...howdy"? There's certainly a match in there, |
| 540 | but when we receive the third ".", we won't find it if we just |
| 541 | restart the matching at the beginning of the string. |
| 542 | |
| 543 | This is a Boyer-Moore kind of situation. We want to reset P to |
| 544 | the end of the longest prefix of STRING that is a suffix of |
| 545 | what we've read so far. In the example above, that would be |
| 546 | ".." --- the longest prefix of "..howdy" that is a suffix of |
| 547 | "...". This longest prefix could be the empty string, if C |
| 548 | is nowhere to be found in STRING. |
| 549 | |
| 550 | If this longest prefix is not the empty string, it must contain |
| 551 | C, so let's search from the end of STRING for instances of C, |
| 552 | and see if the portion of STRING before that is a suffix of |
| 553 | what we read before C. Actually, we can search backwards from |
| 554 | p, since we know no prefix can be longer than that. |
| 555 | |
| 556 | Note that we can use STRING itself, along with C, as a record |
| 557 | of what we've received so far. :) */ |
| 558 | int i; |
| 559 | |
| 560 | for (i = (p - string) - 1; i >= 0; i--) |
| 561 | if (string[i] == c) |
| 562 | { |
| 563 | /* Is this prefix a suffix of what we've read so far? |
| 564 | In other words, does |
| 565 | string[0 .. i-1] == string[p - i, p - 1]? */ |
| 566 | if (! memcmp (string, p - i, i)) |
| 567 | { |
| 568 | p = string + i + 1; |
| 569 | break; |
| 570 | } |
| 571 | } |
| 572 | if (i < 0) |
| 573 | p = string; |
| 574 | } |
| 575 | } |
| 576 | } |
| 577 | |
| 578 | /* Search for a regexp. */ |
| 579 | |
| 580 | static int |
| 581 | monitor_expect_regexp (struct re_pattern_buffer *pat, char *buf, int buflen) |
| 582 | { |
| 583 | char *mybuf; |
| 584 | char *p; |
| 585 | monitor_debug ("MON Expecting regexp\n"); |
| 586 | if (buf) |
| 587 | mybuf = buf; |
| 588 | else |
| 589 | { |
| 590 | mybuf = alloca (TARGET_BUF_SIZE); |
| 591 | buflen = TARGET_BUF_SIZE; |
| 592 | } |
| 593 | |
| 594 | p = mybuf; |
| 595 | while (1) |
| 596 | { |
| 597 | int retval; |
| 598 | |
| 599 | if (p - mybuf >= buflen) |
| 600 | { /* Buffer about to overflow */ |
| 601 | |
| 602 | /* On overflow, we copy the upper half of the buffer to the lower half. Not |
| 603 | great, but it usually works... */ |
| 604 | |
| 605 | memcpy (mybuf, mybuf + buflen / 2, buflen / 2); |
| 606 | p = mybuf + buflen / 2; |
| 607 | } |
| 608 | |
| 609 | *p++ = readchar (timeout); |
| 610 | |
| 611 | retval = re_search (pat, mybuf, p - mybuf, 0, p - mybuf, NULL); |
| 612 | if (retval >= 0) |
| 613 | return 1; |
| 614 | } |
| 615 | } |
| 616 | |
| 617 | /* Keep discarding input until we see the MONITOR prompt. |
| 618 | |
| 619 | The convention for dealing with the prompt is that you |
| 620 | o give your command |
| 621 | o *then* wait for the prompt. |
| 622 | |
| 623 | Thus the last thing that a procedure does with the serial line will |
| 624 | be an monitor_expect_prompt(). Exception: monitor_resume does not |
| 625 | wait for the prompt, because the terminal is being handed over to |
| 626 | the inferior. However, the next thing which happens after that is |
| 627 | a monitor_wait which does wait for the prompt. Note that this |
| 628 | includes abnormal exit, e.g. error(). This is necessary to prevent |
| 629 | getting into states from which we can't recover. */ |
| 630 | |
| 631 | int |
| 632 | monitor_expect_prompt (char *buf, int buflen) |
| 633 | { |
| 634 | monitor_debug ("MON Expecting prompt\n"); |
| 635 | return monitor_expect (current_monitor->prompt, buf, buflen); |
| 636 | } |
| 637 | |
| 638 | /* Get N 32-bit words from remote, each preceded by a space, and put |
| 639 | them in registers starting at REGNO. */ |
| 640 | |
| 641 | #if 0 |
| 642 | static unsigned long |
| 643 | get_hex_word (void) |
| 644 | { |
| 645 | unsigned long val; |
| 646 | int i; |
| 647 | int ch; |
| 648 | |
| 649 | do |
| 650 | ch = readchar (timeout); |
| 651 | while (isspace (ch)); |
| 652 | |
| 653 | val = from_hex (ch); |
| 654 | |
| 655 | for (i = 7; i >= 1; i--) |
| 656 | { |
| 657 | ch = readchar (timeout); |
| 658 | if (!isxdigit (ch)) |
| 659 | break; |
| 660 | val = (val << 4) | from_hex (ch); |
| 661 | } |
| 662 | |
| 663 | return val; |
| 664 | } |
| 665 | #endif |
| 666 | |
| 667 | static void |
| 668 | compile_pattern (char *pattern, struct re_pattern_buffer *compiled_pattern, |
| 669 | char *fastmap) |
| 670 | { |
| 671 | int tmp; |
| 672 | const char *val; |
| 673 | |
| 674 | compiled_pattern->fastmap = fastmap; |
| 675 | |
| 676 | tmp = re_set_syntax (RE_SYNTAX_EMACS); |
| 677 | val = re_compile_pattern (pattern, |
| 678 | strlen (pattern), |
| 679 | compiled_pattern); |
| 680 | re_set_syntax (tmp); |
| 681 | |
| 682 | if (val) |
| 683 | error (_("compile_pattern: Can't compile pattern string `%s': %s!"), pattern, val); |
| 684 | |
| 685 | if (fastmap) |
| 686 | re_compile_fastmap (compiled_pattern); |
| 687 | } |
| 688 | |
| 689 | /* Open a connection to a remote debugger. NAME is the filename used |
| 690 | for communication. */ |
| 691 | |
| 692 | void |
| 693 | monitor_open (char *args, struct monitor_ops *mon_ops, int from_tty) |
| 694 | { |
| 695 | char *name; |
| 696 | char **p; |
| 697 | |
| 698 | if (mon_ops->magic != MONITOR_OPS_MAGIC) |
| 699 | error (_("Magic number of monitor_ops struct wrong.")); |
| 700 | |
| 701 | targ_ops = mon_ops->target; |
| 702 | name = targ_ops->to_shortname; |
| 703 | |
| 704 | if (!args) |
| 705 | error (_("Use `target %s DEVICE-NAME' to use a serial port, or \n\ |
| 706 | `target %s HOST-NAME:PORT-NUMBER' to use a network connection."), name, name); |
| 707 | |
| 708 | target_preopen (from_tty); |
| 709 | |
| 710 | /* Setup pattern for register dump */ |
| 711 | |
| 712 | if (mon_ops->register_pattern) |
| 713 | compile_pattern (mon_ops->register_pattern, ®ister_pattern, |
| 714 | register_fastmap); |
| 715 | |
| 716 | if (mon_ops->getmem.resp_delim) |
| 717 | compile_pattern (mon_ops->getmem.resp_delim, &getmem_resp_delim_pattern, |
| 718 | getmem_resp_delim_fastmap); |
| 719 | |
| 720 | if (mon_ops->setmem.resp_delim) |
| 721 | compile_pattern (mon_ops->setmem.resp_delim, &setmem_resp_delim_pattern, |
| 722 | setmem_resp_delim_fastmap); |
| 723 | |
| 724 | if (mon_ops->setreg.resp_delim) |
| 725 | compile_pattern (mon_ops->setreg.resp_delim, &setreg_resp_delim_pattern, |
| 726 | setreg_resp_delim_fastmap); |
| 727 | |
| 728 | unpush_target (targ_ops); |
| 729 | |
| 730 | if (dev_name) |
| 731 | xfree (dev_name); |
| 732 | dev_name = xstrdup (args); |
| 733 | |
| 734 | monitor_desc = serial_open (dev_name); |
| 735 | |
| 736 | if (!monitor_desc) |
| 737 | perror_with_name (dev_name); |
| 738 | |
| 739 | if (baud_rate != -1) |
| 740 | { |
| 741 | if (serial_setbaudrate (monitor_desc, baud_rate)) |
| 742 | { |
| 743 | serial_close (monitor_desc); |
| 744 | perror_with_name (dev_name); |
| 745 | } |
| 746 | } |
| 747 | |
| 748 | serial_raw (monitor_desc); |
| 749 | |
| 750 | serial_flush_input (monitor_desc); |
| 751 | |
| 752 | /* some systems only work with 2 stop bits */ |
| 753 | |
| 754 | serial_setstopbits (monitor_desc, mon_ops->stopbits); |
| 755 | |
| 756 | current_monitor = mon_ops; |
| 757 | |
| 758 | /* See if we can wake up the monitor. First, try sending a stop sequence, |
| 759 | then send the init strings. Last, remove all breakpoints. */ |
| 760 | |
| 761 | if (current_monitor->stop) |
| 762 | { |
| 763 | monitor_stop (); |
| 764 | if ((current_monitor->flags & MO_NO_ECHO_ON_OPEN) == 0) |
| 765 | { |
| 766 | monitor_debug ("EXP Open echo\n"); |
| 767 | monitor_expect_prompt (NULL, 0); |
| 768 | } |
| 769 | } |
| 770 | |
| 771 | /* wake up the monitor and see if it's alive */ |
| 772 | for (p = mon_ops->init; *p != NULL; p++) |
| 773 | { |
| 774 | /* Some of the characters we send may not be echoed, |
| 775 | but we hope to get a prompt at the end of it all. */ |
| 776 | |
| 777 | if ((current_monitor->flags & MO_NO_ECHO_ON_OPEN) == 0) |
| 778 | monitor_printf (*p); |
| 779 | else |
| 780 | monitor_printf_noecho (*p); |
| 781 | monitor_expect_prompt (NULL, 0); |
| 782 | } |
| 783 | |
| 784 | serial_flush_input (monitor_desc); |
| 785 | |
| 786 | /* Alloc breakpoints */ |
| 787 | if (mon_ops->set_break != NULL) |
| 788 | { |
| 789 | if (mon_ops->num_breakpoints == 0) |
| 790 | mon_ops->num_breakpoints = 8; |
| 791 | |
| 792 | breakaddr = (CORE_ADDR *) xmalloc (mon_ops->num_breakpoints * sizeof (CORE_ADDR)); |
| 793 | memset (breakaddr, 0, mon_ops->num_breakpoints * sizeof (CORE_ADDR)); |
| 794 | } |
| 795 | |
| 796 | /* Remove all breakpoints */ |
| 797 | |
| 798 | if (mon_ops->clr_all_break) |
| 799 | { |
| 800 | monitor_printf (mon_ops->clr_all_break); |
| 801 | monitor_expect_prompt (NULL, 0); |
| 802 | } |
| 803 | |
| 804 | if (from_tty) |
| 805 | printf_unfiltered (_("Remote target %s connected to %s\n"), name, dev_name); |
| 806 | |
| 807 | push_target (targ_ops); |
| 808 | |
| 809 | inferior_ptid = pid_to_ptid (42000); /* Make run command think we are busy... */ |
| 810 | |
| 811 | /* Give monitor_wait something to read */ |
| 812 | |
| 813 | monitor_printf (current_monitor->line_term); |
| 814 | |
| 815 | start_remote (from_tty); |
| 816 | } |
| 817 | |
| 818 | /* Close out all files and local state before this target loses |
| 819 | control. */ |
| 820 | |
| 821 | void |
| 822 | monitor_close (int quitting) |
| 823 | { |
| 824 | if (monitor_desc) |
| 825 | serial_close (monitor_desc); |
| 826 | |
| 827 | /* Free breakpoint memory */ |
| 828 | if (breakaddr != NULL) |
| 829 | { |
| 830 | xfree (breakaddr); |
| 831 | breakaddr = NULL; |
| 832 | } |
| 833 | |
| 834 | monitor_desc = NULL; |
| 835 | } |
| 836 | |
| 837 | /* Terminate the open connection to the remote debugger. Use this |
| 838 | when you want to detach and do something else with your gdb. */ |
| 839 | |
| 840 | static void |
| 841 | monitor_detach (char *args, int from_tty) |
| 842 | { |
| 843 | pop_target (); /* calls monitor_close to do the real work */ |
| 844 | if (from_tty) |
| 845 | printf_unfiltered (_("Ending remote %s debugging\n"), target_shortname); |
| 846 | } |
| 847 | |
| 848 | /* Convert VALSTR into the target byte-ordered value of REGNO and store it. */ |
| 849 | |
| 850 | char * |
| 851 | monitor_supply_register (struct regcache *regcache, int regno, char *valstr) |
| 852 | { |
| 853 | ULONGEST val; |
| 854 | unsigned char regbuf[MAX_REGISTER_SIZE]; |
| 855 | char *p; |
| 856 | |
| 857 | val = 0; |
| 858 | p = valstr; |
| 859 | while (p && *p != '\0') |
| 860 | { |
| 861 | if (*p == '\r' || *p == '\n') |
| 862 | { |
| 863 | while (*p != '\0') |
| 864 | p++; |
| 865 | break; |
| 866 | } |
| 867 | if (isspace (*p)) |
| 868 | { |
| 869 | p++; |
| 870 | continue; |
| 871 | } |
| 872 | if (!isxdigit (*p) && *p != 'x') |
| 873 | { |
| 874 | break; |
| 875 | } |
| 876 | |
| 877 | val <<= 4; |
| 878 | val += fromhex (*p++); |
| 879 | } |
| 880 | monitor_debug ("Supplying Register %d %s\n", regno, valstr); |
| 881 | |
| 882 | if (val == 0 && valstr == p) |
| 883 | error (_("monitor_supply_register (%d): bad value from monitor: %s."), |
| 884 | regno, valstr); |
| 885 | |
| 886 | /* supply register stores in target byte order, so swap here */ |
| 887 | |
| 888 | store_unsigned_integer (regbuf, register_size (current_gdbarch, regno), val); |
| 889 | |
| 890 | regcache_raw_supply (regcache, regno, regbuf); |
| 891 | |
| 892 | return p; |
| 893 | } |
| 894 | |
| 895 | /* Tell the remote machine to resume. */ |
| 896 | |
| 897 | static void |
| 898 | monitor_resume (ptid_t ptid, int step, enum target_signal sig) |
| 899 | { |
| 900 | /* Some monitors require a different command when starting a program */ |
| 901 | monitor_debug ("MON resume\n"); |
| 902 | if (current_monitor->flags & MO_RUN_FIRST_TIME && first_time == 1) |
| 903 | { |
| 904 | first_time = 0; |
| 905 | monitor_printf ("run\r"); |
| 906 | if (current_monitor->flags & MO_NEED_REGDUMP_AFTER_CONT) |
| 907 | dump_reg_flag = 1; |
| 908 | return; |
| 909 | } |
| 910 | if (step) |
| 911 | monitor_printf (current_monitor->step); |
| 912 | else |
| 913 | { |
| 914 | if (current_monitor->continue_hook) |
| 915 | (*current_monitor->continue_hook) (); |
| 916 | else |
| 917 | monitor_printf (current_monitor->cont); |
| 918 | if (current_monitor->flags & MO_NEED_REGDUMP_AFTER_CONT) |
| 919 | dump_reg_flag = 1; |
| 920 | } |
| 921 | } |
| 922 | |
| 923 | /* Parse the output of a register dump command. A monitor specific |
| 924 | regexp is used to extract individual register descriptions of the |
| 925 | form REG=VAL. Each description is split up into a name and a value |
| 926 | string which are passed down to monitor specific code. */ |
| 927 | |
| 928 | static void |
| 929 | parse_register_dump (struct regcache *regcache, char *buf, int len) |
| 930 | { |
| 931 | monitor_debug ("MON Parsing register dump\n"); |
| 932 | while (1) |
| 933 | { |
| 934 | int regnamelen, vallen; |
| 935 | char *regname, *val; |
| 936 | /* Element 0 points to start of register name, and element 1 |
| 937 | points to the start of the register value. */ |
| 938 | struct re_registers register_strings; |
| 939 | |
| 940 | memset (®ister_strings, 0, sizeof (struct re_registers)); |
| 941 | |
| 942 | if (re_search (®ister_pattern, buf, len, 0, len, |
| 943 | ®ister_strings) == -1) |
| 944 | break; |
| 945 | |
| 946 | regnamelen = register_strings.end[1] - register_strings.start[1]; |
| 947 | regname = buf + register_strings.start[1]; |
| 948 | vallen = register_strings.end[2] - register_strings.start[2]; |
| 949 | val = buf + register_strings.start[2]; |
| 950 | |
| 951 | current_monitor->supply_register (regcache, regname, regnamelen, |
| 952 | val, vallen); |
| 953 | |
| 954 | buf += register_strings.end[0]; |
| 955 | len -= register_strings.end[0]; |
| 956 | } |
| 957 | } |
| 958 | |
| 959 | /* Send ^C to target to halt it. Target will respond, and send us a |
| 960 | packet. */ |
| 961 | |
| 962 | static void |
| 963 | monitor_interrupt (int signo) |
| 964 | { |
| 965 | /* If this doesn't work, try more severe steps. */ |
| 966 | signal (signo, monitor_interrupt_twice); |
| 967 | |
| 968 | if (monitor_debug_p || remote_debug) |
| 969 | fprintf_unfiltered (gdb_stdlog, "monitor_interrupt called\n"); |
| 970 | |
| 971 | target_stop (); |
| 972 | } |
| 973 | |
| 974 | /* The user typed ^C twice. */ |
| 975 | |
| 976 | static void |
| 977 | monitor_interrupt_twice (int signo) |
| 978 | { |
| 979 | signal (signo, ofunc); |
| 980 | |
| 981 | monitor_interrupt_query (); |
| 982 | |
| 983 | signal (signo, monitor_interrupt); |
| 984 | } |
| 985 | |
| 986 | /* Ask the user what to do when an interrupt is received. */ |
| 987 | |
| 988 | static void |
| 989 | monitor_interrupt_query (void) |
| 990 | { |
| 991 | target_terminal_ours (); |
| 992 | |
| 993 | if (query ("Interrupted while waiting for the program.\n\ |
| 994 | Give up (and stop debugging it)? ")) |
| 995 | { |
| 996 | target_mourn_inferior (); |
| 997 | deprecated_throw_reason (RETURN_QUIT); |
| 998 | } |
| 999 | |
| 1000 | target_terminal_inferior (); |
| 1001 | } |
| 1002 | |
| 1003 | static void |
| 1004 | monitor_wait_cleanup (void *old_timeout) |
| 1005 | { |
| 1006 | timeout = *(int *) old_timeout; |
| 1007 | signal (SIGINT, ofunc); |
| 1008 | in_monitor_wait = 0; |
| 1009 | } |
| 1010 | |
| 1011 | |
| 1012 | |
| 1013 | static void |
| 1014 | monitor_wait_filter (char *buf, |
| 1015 | int bufmax, |
| 1016 | int *ext_resp_len, |
| 1017 | struct target_waitstatus *status) |
| 1018 | { |
| 1019 | int resp_len; |
| 1020 | do |
| 1021 | { |
| 1022 | resp_len = monitor_expect_prompt (buf, bufmax); |
| 1023 | *ext_resp_len = resp_len; |
| 1024 | |
| 1025 | if (resp_len <= 0) |
| 1026 | fprintf_unfiltered (gdb_stderr, "monitor_wait: excessive response from monitor: %s.", buf); |
| 1027 | } |
| 1028 | while (resp_len < 0); |
| 1029 | |
| 1030 | /* Print any output characters that were preceded by ^O. */ |
| 1031 | /* FIXME - This would be great as a user settabgle flag */ |
| 1032 | if (monitor_debug_p || remote_debug |
| 1033 | || current_monitor->flags & MO_PRINT_PROGRAM_OUTPUT) |
| 1034 | { |
| 1035 | int i; |
| 1036 | |
| 1037 | for (i = 0; i < resp_len - 1; i++) |
| 1038 | if (buf[i] == 0x0f) |
| 1039 | putchar_unfiltered (buf[++i]); |
| 1040 | } |
| 1041 | } |
| 1042 | |
| 1043 | |
| 1044 | |
| 1045 | /* Wait until the remote machine stops, then return, storing status in |
| 1046 | status just as `wait' would. */ |
| 1047 | |
| 1048 | static ptid_t |
| 1049 | monitor_wait (ptid_t ptid, struct target_waitstatus *status) |
| 1050 | { |
| 1051 | int old_timeout = timeout; |
| 1052 | char buf[TARGET_BUF_SIZE]; |
| 1053 | int resp_len; |
| 1054 | struct cleanup *old_chain; |
| 1055 | |
| 1056 | status->kind = TARGET_WAITKIND_EXITED; |
| 1057 | status->value.integer = 0; |
| 1058 | |
| 1059 | old_chain = make_cleanup (monitor_wait_cleanup, &old_timeout); |
| 1060 | monitor_debug ("MON wait\n"); |
| 1061 | |
| 1062 | #if 0 |
| 1063 | /* This is somthing other than a maintenance command */ |
| 1064 | in_monitor_wait = 1; |
| 1065 | timeout = watchdog > 0 ? watchdog : -1; |
| 1066 | #else |
| 1067 | timeout = -1; /* Don't time out -- user program is running. */ |
| 1068 | #endif |
| 1069 | |
| 1070 | ofunc = (void (*)()) signal (SIGINT, monitor_interrupt); |
| 1071 | |
| 1072 | if (current_monitor->wait_filter) |
| 1073 | (*current_monitor->wait_filter) (buf, sizeof (buf), &resp_len, status); |
| 1074 | else |
| 1075 | monitor_wait_filter (buf, sizeof (buf), &resp_len, status); |
| 1076 | |
| 1077 | #if 0 /* Transferred to monitor wait filter */ |
| 1078 | do |
| 1079 | { |
| 1080 | resp_len = monitor_expect_prompt (buf, sizeof (buf)); |
| 1081 | |
| 1082 | if (resp_len <= 0) |
| 1083 | fprintf_unfiltered (gdb_stderr, "monitor_wait: excessive response from monitor: %s.", buf); |
| 1084 | } |
| 1085 | while (resp_len < 0); |
| 1086 | |
| 1087 | /* Print any output characters that were preceded by ^O. */ |
| 1088 | /* FIXME - This would be great as a user settabgle flag */ |
| 1089 | if (monitor_debug_p || remote_debug |
| 1090 | || current_monitor->flags & MO_PRINT_PROGRAM_OUTPUT) |
| 1091 | { |
| 1092 | int i; |
| 1093 | |
| 1094 | for (i = 0; i < resp_len - 1; i++) |
| 1095 | if (buf[i] == 0x0f) |
| 1096 | putchar_unfiltered (buf[++i]); |
| 1097 | } |
| 1098 | #endif |
| 1099 | |
| 1100 | signal (SIGINT, ofunc); |
| 1101 | |
| 1102 | timeout = old_timeout; |
| 1103 | #if 0 |
| 1104 | if (dump_reg_flag && current_monitor->dump_registers) |
| 1105 | { |
| 1106 | dump_reg_flag = 0; |
| 1107 | monitor_printf (current_monitor->dump_registers); |
| 1108 | resp_len = monitor_expect_prompt (buf, sizeof (buf)); |
| 1109 | } |
| 1110 | |
| 1111 | if (current_monitor->register_pattern) |
| 1112 | parse_register_dump (get_current_regcache (), buf, resp_len); |
| 1113 | #else |
| 1114 | monitor_debug ("Wait fetching registers after stop\n"); |
| 1115 | monitor_dump_regs (get_current_regcache ()); |
| 1116 | #endif |
| 1117 | |
| 1118 | status->kind = TARGET_WAITKIND_STOPPED; |
| 1119 | status->value.sig = TARGET_SIGNAL_TRAP; |
| 1120 | |
| 1121 | discard_cleanups (old_chain); |
| 1122 | |
| 1123 | in_monitor_wait = 0; |
| 1124 | |
| 1125 | return inferior_ptid; |
| 1126 | } |
| 1127 | |
| 1128 | /* Fetch register REGNO, or all registers if REGNO is -1. Returns |
| 1129 | errno value. */ |
| 1130 | |
| 1131 | static void |
| 1132 | monitor_fetch_register (struct regcache *regcache, int regno) |
| 1133 | { |
| 1134 | const char *name; |
| 1135 | char *zerobuf; |
| 1136 | char *regbuf; |
| 1137 | int i; |
| 1138 | |
| 1139 | regbuf = alloca (MAX_REGISTER_SIZE * 2 + 1); |
| 1140 | zerobuf = alloca (MAX_REGISTER_SIZE); |
| 1141 | memset (zerobuf, 0, MAX_REGISTER_SIZE); |
| 1142 | |
| 1143 | if (current_monitor->regname != NULL) |
| 1144 | name = current_monitor->regname (regno); |
| 1145 | else |
| 1146 | name = current_monitor->regnames[regno]; |
| 1147 | monitor_debug ("MON fetchreg %d '%s'\n", regno, name ? name : "(null name)"); |
| 1148 | |
| 1149 | if (!name || (*name == '\0')) |
| 1150 | { |
| 1151 | monitor_debug ("No register known for %d\n", regno); |
| 1152 | regcache_raw_supply (regcache, regno, zerobuf); |
| 1153 | return; |
| 1154 | } |
| 1155 | |
| 1156 | /* send the register examine command */ |
| 1157 | |
| 1158 | monitor_printf (current_monitor->getreg.cmd, name); |
| 1159 | |
| 1160 | /* If RESP_DELIM is specified, we search for that as a leading |
| 1161 | delimiter for the register value. Otherwise, we just start |
| 1162 | searching from the start of the buf. */ |
| 1163 | |
| 1164 | if (current_monitor->getreg.resp_delim) |
| 1165 | { |
| 1166 | monitor_debug ("EXP getreg.resp_delim\n"); |
| 1167 | monitor_expect (current_monitor->getreg.resp_delim, NULL, 0); |
| 1168 | /* Handle case of first 32 registers listed in pairs. */ |
| 1169 | if (current_monitor->flags & MO_32_REGS_PAIRED |
| 1170 | && (regno & 1) != 0 && regno < 32) |
| 1171 | { |
| 1172 | monitor_debug ("EXP getreg.resp_delim\n"); |
| 1173 | monitor_expect (current_monitor->getreg.resp_delim, NULL, 0); |
| 1174 | } |
| 1175 | } |
| 1176 | |
| 1177 | /* Skip leading spaces and "0x" if MO_HEX_PREFIX flag is set */ |
| 1178 | if (current_monitor->flags & MO_HEX_PREFIX) |
| 1179 | { |
| 1180 | int c; |
| 1181 | c = readchar (timeout); |
| 1182 | while (c == ' ') |
| 1183 | c = readchar (timeout); |
| 1184 | if ((c == '0') && ((c = readchar (timeout)) == 'x')) |
| 1185 | ; |
| 1186 | else |
| 1187 | error (_("Bad value returned from monitor while fetching register %x."), |
| 1188 | regno); |
| 1189 | } |
| 1190 | |
| 1191 | /* Read upto the maximum number of hex digits for this register, skipping |
| 1192 | spaces, but stop reading if something else is seen. Some monitors |
| 1193 | like to drop leading zeros. */ |
| 1194 | |
| 1195 | for (i = 0; i < register_size (current_gdbarch, regno) * 2; i++) |
| 1196 | { |
| 1197 | int c; |
| 1198 | c = readchar (timeout); |
| 1199 | while (c == ' ') |
| 1200 | c = readchar (timeout); |
| 1201 | |
| 1202 | if (!isxdigit (c)) |
| 1203 | break; |
| 1204 | |
| 1205 | regbuf[i] = c; |
| 1206 | } |
| 1207 | |
| 1208 | regbuf[i] = '\000'; /* terminate the number */ |
| 1209 | monitor_debug ("REGVAL '%s'\n", regbuf); |
| 1210 | |
| 1211 | /* If TERM is present, we wait for that to show up. Also, (if TERM |
| 1212 | is present), we will send TERM_CMD if that is present. In any |
| 1213 | case, we collect all of the output into buf, and then wait for |
| 1214 | the normal prompt. */ |
| 1215 | |
| 1216 | if (current_monitor->getreg.term) |
| 1217 | { |
| 1218 | monitor_debug ("EXP getreg.term\n"); |
| 1219 | monitor_expect (current_monitor->getreg.term, NULL, 0); /* get response */ |
| 1220 | } |
| 1221 | |
| 1222 | if (current_monitor->getreg.term_cmd) |
| 1223 | { |
| 1224 | monitor_debug ("EMIT getreg.term.cmd\n"); |
| 1225 | monitor_printf (current_monitor->getreg.term_cmd); |
| 1226 | } |
| 1227 | if (!current_monitor->getreg.term || /* Already expected or */ |
| 1228 | current_monitor->getreg.term_cmd) /* ack expected */ |
| 1229 | monitor_expect_prompt (NULL, 0); /* get response */ |
| 1230 | |
| 1231 | monitor_supply_register (regcache, regno, regbuf); |
| 1232 | } |
| 1233 | |
| 1234 | /* Sometimes, it takes several commands to dump the registers */ |
| 1235 | /* This is a primitive for use by variations of monitor interfaces in |
| 1236 | case they need to compose the operation. |
| 1237 | */ |
| 1238 | int |
| 1239 | monitor_dump_reg_block (struct regcache *regcache, char *block_cmd) |
| 1240 | { |
| 1241 | char buf[TARGET_BUF_SIZE]; |
| 1242 | int resp_len; |
| 1243 | monitor_printf (block_cmd); |
| 1244 | resp_len = monitor_expect_prompt (buf, sizeof (buf)); |
| 1245 | parse_register_dump (regcache, buf, resp_len); |
| 1246 | return 1; |
| 1247 | } |
| 1248 | |
| 1249 | |
| 1250 | /* Read the remote registers into the block regs. */ |
| 1251 | /* Call the specific function if it has been provided */ |
| 1252 | |
| 1253 | static void |
| 1254 | monitor_dump_regs (struct regcache *regcache) |
| 1255 | { |
| 1256 | char buf[TARGET_BUF_SIZE]; |
| 1257 | int resp_len; |
| 1258 | if (current_monitor->dumpregs) |
| 1259 | (*(current_monitor->dumpregs)) (regcache); /* call supplied function */ |
| 1260 | else if (current_monitor->dump_registers) /* default version */ |
| 1261 | { |
| 1262 | monitor_printf (current_monitor->dump_registers); |
| 1263 | resp_len = monitor_expect_prompt (buf, sizeof (buf)); |
| 1264 | parse_register_dump (regcache, buf, resp_len); |
| 1265 | } |
| 1266 | else |
| 1267 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); /* Need some way to read registers */ |
| 1268 | } |
| 1269 | |
| 1270 | static void |
| 1271 | monitor_fetch_registers (struct regcache *regcache, int regno) |
| 1272 | { |
| 1273 | monitor_debug ("MON fetchregs\n"); |
| 1274 | if (current_monitor->getreg.cmd) |
| 1275 | { |
| 1276 | if (regno >= 0) |
| 1277 | { |
| 1278 | monitor_fetch_register (regcache, regno); |
| 1279 | return; |
| 1280 | } |
| 1281 | |
| 1282 | for (regno = 0; regno < gdbarch_num_regs (current_gdbarch); regno++) |
| 1283 | monitor_fetch_register (regcache, regno); |
| 1284 | } |
| 1285 | else |
| 1286 | { |
| 1287 | monitor_dump_regs (regcache); |
| 1288 | } |
| 1289 | } |
| 1290 | |
| 1291 | /* Store register REGNO, or all if REGNO == 0. Return errno value. */ |
| 1292 | |
| 1293 | static void |
| 1294 | monitor_store_register (struct regcache *regcache, int regno) |
| 1295 | { |
| 1296 | const char *name; |
| 1297 | ULONGEST val; |
| 1298 | |
| 1299 | if (current_monitor->regname != NULL) |
| 1300 | name = current_monitor->regname (regno); |
| 1301 | else |
| 1302 | name = current_monitor->regnames[regno]; |
| 1303 | |
| 1304 | if (!name || (*name == '\0')) |
| 1305 | { |
| 1306 | monitor_debug ("MON Cannot store unknown register\n"); |
| 1307 | return; |
| 1308 | } |
| 1309 | |
| 1310 | regcache_cooked_read_unsigned (regcache, regno, &val); |
| 1311 | monitor_debug ("MON storeg %d %s\n", regno, |
| 1312 | phex (val, register_size (current_gdbarch, regno))); |
| 1313 | |
| 1314 | /* send the register deposit command */ |
| 1315 | |
| 1316 | if (current_monitor->flags & MO_REGISTER_VALUE_FIRST) |
| 1317 | monitor_printf (current_monitor->setreg.cmd, val, name); |
| 1318 | else if (current_monitor->flags & MO_SETREG_INTERACTIVE) |
| 1319 | monitor_printf (current_monitor->setreg.cmd, name); |
| 1320 | else |
| 1321 | monitor_printf (current_monitor->setreg.cmd, name, val); |
| 1322 | |
| 1323 | if (current_monitor->setreg.resp_delim) |
| 1324 | { |
| 1325 | monitor_debug ("EXP setreg.resp_delim\n"); |
| 1326 | monitor_expect_regexp (&setreg_resp_delim_pattern, NULL, 0); |
| 1327 | if (current_monitor->flags & MO_SETREG_INTERACTIVE) |
| 1328 | monitor_printf ("%s\r", paddr_nz (val)); |
| 1329 | } |
| 1330 | if (current_monitor->setreg.term) |
| 1331 | { |
| 1332 | monitor_debug ("EXP setreg.term\n"); |
| 1333 | monitor_expect (current_monitor->setreg.term, NULL, 0); |
| 1334 | if (current_monitor->flags & MO_SETREG_INTERACTIVE) |
| 1335 | monitor_printf ("%s\r", paddr_nz (val)); |
| 1336 | monitor_expect_prompt (NULL, 0); |
| 1337 | } |
| 1338 | else |
| 1339 | monitor_expect_prompt (NULL, 0); |
| 1340 | if (current_monitor->setreg.term_cmd) /* Mode exit required */ |
| 1341 | { |
| 1342 | monitor_debug ("EXP setreg_termcmd\n"); |
| 1343 | monitor_printf ("%s", current_monitor->setreg.term_cmd); |
| 1344 | monitor_expect_prompt (NULL, 0); |
| 1345 | } |
| 1346 | } /* monitor_store_register */ |
| 1347 | |
| 1348 | /* Store the remote registers. */ |
| 1349 | |
| 1350 | static void |
| 1351 | monitor_store_registers (struct regcache *regcache, int regno) |
| 1352 | { |
| 1353 | if (regno >= 0) |
| 1354 | { |
| 1355 | monitor_store_register (regcache, regno); |
| 1356 | return; |
| 1357 | } |
| 1358 | |
| 1359 | for (regno = 0; regno < gdbarch_num_regs (current_gdbarch); regno++) |
| 1360 | monitor_store_register (regcache, regno); |
| 1361 | } |
| 1362 | |
| 1363 | /* Get ready to modify the registers array. On machines which store |
| 1364 | individual registers, this doesn't need to do anything. On machines |
| 1365 | which store all the registers in one fell swoop, this makes sure |
| 1366 | that registers contains all the registers from the program being |
| 1367 | debugged. */ |
| 1368 | |
| 1369 | static void |
| 1370 | monitor_prepare_to_store (struct regcache *regcache) |
| 1371 | { |
| 1372 | /* Do nothing, since we can store individual regs */ |
| 1373 | } |
| 1374 | |
| 1375 | static void |
| 1376 | monitor_files_info (struct target_ops *ops) |
| 1377 | { |
| 1378 | printf_unfiltered (_("\tAttached to %s at %d baud.\n"), dev_name, baud_rate); |
| 1379 | } |
| 1380 | |
| 1381 | static int |
| 1382 | monitor_write_memory (CORE_ADDR memaddr, char *myaddr, int len) |
| 1383 | { |
| 1384 | unsigned int val, hostval; |
| 1385 | char *cmd; |
| 1386 | int i; |
| 1387 | |
| 1388 | monitor_debug ("MON write %d %s\n", len, paddr (memaddr)); |
| 1389 | |
| 1390 | if (current_monitor->flags & MO_ADDR_BITS_REMOVE) |
| 1391 | memaddr = gdbarch_addr_bits_remove (current_gdbarch, memaddr); |
| 1392 | |
| 1393 | /* Use memory fill command for leading 0 bytes. */ |
| 1394 | |
| 1395 | if (current_monitor->fill) |
| 1396 | { |
| 1397 | for (i = 0; i < len; i++) |
| 1398 | if (myaddr[i] != 0) |
| 1399 | break; |
| 1400 | |
| 1401 | if (i > 4) /* More than 4 zeros is worth doing */ |
| 1402 | { |
| 1403 | monitor_debug ("MON FILL %d\n", i); |
| 1404 | if (current_monitor->flags & MO_FILL_USES_ADDR) |
| 1405 | monitor_printf (current_monitor->fill, memaddr, (memaddr + i) - 1, 0); |
| 1406 | else |
| 1407 | monitor_printf (current_monitor->fill, memaddr, i, 0); |
| 1408 | |
| 1409 | monitor_expect_prompt (NULL, 0); |
| 1410 | |
| 1411 | return i; |
| 1412 | } |
| 1413 | } |
| 1414 | |
| 1415 | #if 0 |
| 1416 | /* Can't actually use long longs if VAL is an int (nice idea, though). */ |
| 1417 | if ((memaddr & 0x7) == 0 && len >= 8 && current_monitor->setmem.cmdll) |
| 1418 | { |
| 1419 | len = 8; |
| 1420 | cmd = current_monitor->setmem.cmdll; |
| 1421 | } |
| 1422 | else |
| 1423 | #endif |
| 1424 | if ((memaddr & 0x3) == 0 && len >= 4 && current_monitor->setmem.cmdl) |
| 1425 | { |
| 1426 | len = 4; |
| 1427 | cmd = current_monitor->setmem.cmdl; |
| 1428 | } |
| 1429 | else if ((memaddr & 0x1) == 0 && len >= 2 && current_monitor->setmem.cmdw) |
| 1430 | { |
| 1431 | len = 2; |
| 1432 | cmd = current_monitor->setmem.cmdw; |
| 1433 | } |
| 1434 | else |
| 1435 | { |
| 1436 | len = 1; |
| 1437 | cmd = current_monitor->setmem.cmdb; |
| 1438 | } |
| 1439 | |
| 1440 | val = extract_unsigned_integer (myaddr, len); |
| 1441 | |
| 1442 | if (len == 4) |
| 1443 | { |
| 1444 | hostval = *(unsigned int *) myaddr; |
| 1445 | monitor_debug ("Hostval(%08x) val(%08x)\n", hostval, val); |
| 1446 | } |
| 1447 | |
| 1448 | |
| 1449 | if (current_monitor->flags & MO_NO_ECHO_ON_SETMEM) |
| 1450 | monitor_printf_noecho (cmd, memaddr, val); |
| 1451 | else if (current_monitor->flags & MO_SETMEM_INTERACTIVE) |
| 1452 | { |
| 1453 | |
| 1454 | monitor_printf_noecho (cmd, memaddr); |
| 1455 | |
| 1456 | if (current_monitor->setmem.resp_delim) |
| 1457 | { |
| 1458 | monitor_debug ("EXP setmem.resp_delim"); |
| 1459 | monitor_expect_regexp (&setmem_resp_delim_pattern, NULL, 0); |
| 1460 | monitor_printf ("%x\r", val); |
| 1461 | } |
| 1462 | if (current_monitor->setmem.term) |
| 1463 | { |
| 1464 | monitor_debug ("EXP setmem.term"); |
| 1465 | monitor_expect (current_monitor->setmem.term, NULL, 0); |
| 1466 | monitor_printf ("%x\r", val); |
| 1467 | } |
| 1468 | if (current_monitor->setmem.term_cmd) |
| 1469 | { /* Emit this to get out of the memory editing state */ |
| 1470 | monitor_printf ("%s", current_monitor->setmem.term_cmd); |
| 1471 | /* Drop through to expecting a prompt */ |
| 1472 | } |
| 1473 | } |
| 1474 | else |
| 1475 | monitor_printf (cmd, memaddr, val); |
| 1476 | |
| 1477 | monitor_expect_prompt (NULL, 0); |
| 1478 | |
| 1479 | return len; |
| 1480 | } |
| 1481 | |
| 1482 | |
| 1483 | static int |
| 1484 | monitor_write_memory_bytes (CORE_ADDR memaddr, char *myaddr, int len) |
| 1485 | { |
| 1486 | unsigned char val; |
| 1487 | int written = 0; |
| 1488 | if (len == 0) |
| 1489 | return 0; |
| 1490 | /* Enter the sub mode */ |
| 1491 | monitor_printf (current_monitor->setmem.cmdb, memaddr); |
| 1492 | monitor_expect_prompt (NULL, 0); |
| 1493 | while (len) |
| 1494 | { |
| 1495 | val = *myaddr; |
| 1496 | monitor_printf ("%x\r", val); |
| 1497 | myaddr++; |
| 1498 | memaddr++; |
| 1499 | written++; |
| 1500 | /* If we wanted to, here we could validate the address */ |
| 1501 | monitor_expect_prompt (NULL, 0); |
| 1502 | len--; |
| 1503 | } |
| 1504 | /* Now exit the sub mode */ |
| 1505 | monitor_printf (current_monitor->getreg.term_cmd); |
| 1506 | monitor_expect_prompt (NULL, 0); |
| 1507 | return written; |
| 1508 | } |
| 1509 | |
| 1510 | |
| 1511 | static void |
| 1512 | longlongendswap (unsigned char *a) |
| 1513 | { |
| 1514 | int i, j; |
| 1515 | unsigned char x; |
| 1516 | i = 0; |
| 1517 | j = 7; |
| 1518 | while (i < 4) |
| 1519 | { |
| 1520 | x = *(a + i); |
| 1521 | *(a + i) = *(a + j); |
| 1522 | *(a + j) = x; |
| 1523 | i++, j--; |
| 1524 | } |
| 1525 | } |
| 1526 | /* Format 32 chars of long long value, advance the pointer */ |
| 1527 | static char *hexlate = "0123456789abcdef"; |
| 1528 | static char * |
| 1529 | longlong_hexchars (unsigned long long value, |
| 1530 | char *outbuff) |
| 1531 | { |
| 1532 | if (value == 0) |
| 1533 | { |
| 1534 | *outbuff++ = '0'; |
| 1535 | return outbuff; |
| 1536 | } |
| 1537 | else |
| 1538 | { |
| 1539 | static unsigned char disbuf[8]; /* disassembly buffer */ |
| 1540 | unsigned char *scan, *limit; /* loop controls */ |
| 1541 | unsigned char c, nib; |
| 1542 | int leadzero = 1; |
| 1543 | scan = disbuf; |
| 1544 | limit = scan + 8; |
| 1545 | { |
| 1546 | unsigned long long *dp; |
| 1547 | dp = (unsigned long long *) scan; |
| 1548 | *dp = value; |
| 1549 | } |
| 1550 | longlongendswap (disbuf); /* FIXME: ONly on big endian hosts */ |
| 1551 | while (scan < limit) |
| 1552 | { |
| 1553 | c = *scan++; /* a byte of our long long value */ |
| 1554 | if (leadzero) |
| 1555 | { |
| 1556 | if (c == 0) |
| 1557 | continue; |
| 1558 | else |
| 1559 | leadzero = 0; /* henceforth we print even zeroes */ |
| 1560 | } |
| 1561 | nib = c >> 4; /* high nibble bits */ |
| 1562 | *outbuff++ = hexlate[nib]; |
| 1563 | nib = c & 0x0f; /* low nibble bits */ |
| 1564 | *outbuff++ = hexlate[nib]; |
| 1565 | } |
| 1566 | return outbuff; |
| 1567 | } |
| 1568 | } /* longlong_hexchars */ |
| 1569 | |
| 1570 | |
| 1571 | |
| 1572 | /* I am only going to call this when writing virtual byte streams. |
| 1573 | Which possably entails endian conversions |
| 1574 | */ |
| 1575 | static int |
| 1576 | monitor_write_memory_longlongs (CORE_ADDR memaddr, char *myaddr, int len) |
| 1577 | { |
| 1578 | static char hexstage[20]; /* At least 16 digits required, plus null */ |
| 1579 | char *endstring; |
| 1580 | long long *llptr; |
| 1581 | long long value; |
| 1582 | int written = 0; |
| 1583 | llptr = (unsigned long long *) myaddr; |
| 1584 | if (len == 0) |
| 1585 | return 0; |
| 1586 | monitor_printf (current_monitor->setmem.cmdll, memaddr); |
| 1587 | monitor_expect_prompt (NULL, 0); |
| 1588 | while (len >= 8) |
| 1589 | { |
| 1590 | value = *llptr; |
| 1591 | endstring = longlong_hexchars (*llptr, hexstage); |
| 1592 | *endstring = '\0'; /* NUll terminate for printf */ |
| 1593 | monitor_printf ("%s\r", hexstage); |
| 1594 | llptr++; |
| 1595 | memaddr += 8; |
| 1596 | written += 8; |
| 1597 | /* If we wanted to, here we could validate the address */ |
| 1598 | monitor_expect_prompt (NULL, 0); |
| 1599 | len -= 8; |
| 1600 | } |
| 1601 | /* Now exit the sub mode */ |
| 1602 | monitor_printf (current_monitor->getreg.term_cmd); |
| 1603 | monitor_expect_prompt (NULL, 0); |
| 1604 | return written; |
| 1605 | } /* */ |
| 1606 | |
| 1607 | |
| 1608 | |
| 1609 | /* ----- MONITOR_WRITE_MEMORY_BLOCK ---------------------------- */ |
| 1610 | /* This is for the large blocks of memory which may occur in downloading. |
| 1611 | And for monitors which use interactive entry, |
| 1612 | And for monitors which do not have other downloading methods. |
| 1613 | Without this, we will end up calling monitor_write_memory many times |
| 1614 | and do the entry and exit of the sub mode many times |
| 1615 | This currently assumes... |
| 1616 | MO_SETMEM_INTERACTIVE |
| 1617 | ! MO_NO_ECHO_ON_SETMEM |
| 1618 | To use this, the you have to patch the monitor_cmds block with |
| 1619 | this function. Otherwise, its not tuned up for use by all |
| 1620 | monitor variations. |
| 1621 | */ |
| 1622 | |
| 1623 | static int |
| 1624 | monitor_write_memory_block (CORE_ADDR memaddr, char *myaddr, int len) |
| 1625 | { |
| 1626 | int written; |
| 1627 | written = 0; |
| 1628 | /* FIXME: This would be a good place to put the zero test */ |
| 1629 | #if 1 |
| 1630 | if ((len > 8) && (((len & 0x07)) == 0) && current_monitor->setmem.cmdll) |
| 1631 | { |
| 1632 | return monitor_write_memory_longlongs (memaddr, myaddr, len); |
| 1633 | } |
| 1634 | #endif |
| 1635 | written = monitor_write_memory_bytes (memaddr, myaddr, len); |
| 1636 | return written; |
| 1637 | } |
| 1638 | |
| 1639 | /* This is an alternate form of monitor_read_memory which is used for monitors |
| 1640 | which can only read a single byte/word/etc. at a time. */ |
| 1641 | |
| 1642 | static int |
| 1643 | monitor_read_memory_single (CORE_ADDR memaddr, char *myaddr, int len) |
| 1644 | { |
| 1645 | unsigned int val; |
| 1646 | char membuf[sizeof (int) * 2 + 1]; |
| 1647 | char *p; |
| 1648 | char *cmd; |
| 1649 | |
| 1650 | monitor_debug ("MON read single\n"); |
| 1651 | #if 0 |
| 1652 | /* Can't actually use long longs (nice idea, though). In fact, the |
| 1653 | call to strtoul below will fail if it tries to convert a value |
| 1654 | that's too big to fit in a long. */ |
| 1655 | if ((memaddr & 0x7) == 0 && len >= 8 && current_monitor->getmem.cmdll) |
| 1656 | { |
| 1657 | len = 8; |
| 1658 | cmd = current_monitor->getmem.cmdll; |
| 1659 | } |
| 1660 | else |
| 1661 | #endif |
| 1662 | if ((memaddr & 0x3) == 0 && len >= 4 && current_monitor->getmem.cmdl) |
| 1663 | { |
| 1664 | len = 4; |
| 1665 | cmd = current_monitor->getmem.cmdl; |
| 1666 | } |
| 1667 | else if ((memaddr & 0x1) == 0 && len >= 2 && current_monitor->getmem.cmdw) |
| 1668 | { |
| 1669 | len = 2; |
| 1670 | cmd = current_monitor->getmem.cmdw; |
| 1671 | } |
| 1672 | else |
| 1673 | { |
| 1674 | len = 1; |
| 1675 | cmd = current_monitor->getmem.cmdb; |
| 1676 | } |
| 1677 | |
| 1678 | /* Send the examine command. */ |
| 1679 | |
| 1680 | monitor_printf (cmd, memaddr); |
| 1681 | |
| 1682 | /* If RESP_DELIM is specified, we search for that as a leading |
| 1683 | delimiter for the memory value. Otherwise, we just start |
| 1684 | searching from the start of the buf. */ |
| 1685 | |
| 1686 | if (current_monitor->getmem.resp_delim) |
| 1687 | { |
| 1688 | monitor_debug ("EXP getmem.resp_delim\n"); |
| 1689 | monitor_expect_regexp (&getmem_resp_delim_pattern, NULL, 0); |
| 1690 | } |
| 1691 | |
| 1692 | /* Now, read the appropriate number of hex digits for this loc, |
| 1693 | skipping spaces. */ |
| 1694 | |
| 1695 | /* Skip leading spaces and "0x" if MO_HEX_PREFIX flag is set. */ |
| 1696 | if (current_monitor->flags & MO_HEX_PREFIX) |
| 1697 | { |
| 1698 | int c; |
| 1699 | |
| 1700 | c = readchar (timeout); |
| 1701 | while (c == ' ') |
| 1702 | c = readchar (timeout); |
| 1703 | if ((c == '0') && ((c = readchar (timeout)) == 'x')) |
| 1704 | ; |
| 1705 | else |
| 1706 | monitor_error ("monitor_read_memory_single", |
| 1707 | "bad response from monitor", |
| 1708 | memaddr, 0, NULL, 0); |
| 1709 | } |
| 1710 | |
| 1711 | { |
| 1712 | int i; |
| 1713 | for (i = 0; i < len * 2; i++) |
| 1714 | { |
| 1715 | int c; |
| 1716 | |
| 1717 | while (1) |
| 1718 | { |
| 1719 | c = readchar (timeout); |
| 1720 | if (isxdigit (c)) |
| 1721 | break; |
| 1722 | if (c == ' ') |
| 1723 | continue; |
| 1724 | |
| 1725 | monitor_error ("monitor_read_memory_single", |
| 1726 | "bad response from monitor", |
| 1727 | memaddr, i, membuf, 0); |
| 1728 | } |
| 1729 | membuf[i] = c; |
| 1730 | } |
| 1731 | membuf[i] = '\000'; /* terminate the number */ |
| 1732 | } |
| 1733 | |
| 1734 | /* If TERM is present, we wait for that to show up. Also, (if TERM is |
| 1735 | present), we will send TERM_CMD if that is present. In any case, we collect |
| 1736 | all of the output into buf, and then wait for the normal prompt. */ |
| 1737 | |
| 1738 | if (current_monitor->getmem.term) |
| 1739 | { |
| 1740 | monitor_expect (current_monitor->getmem.term, NULL, 0); /* get response */ |
| 1741 | |
| 1742 | if (current_monitor->getmem.term_cmd) |
| 1743 | { |
| 1744 | monitor_printf (current_monitor->getmem.term_cmd); |
| 1745 | monitor_expect_prompt (NULL, 0); |
| 1746 | } |
| 1747 | } |
| 1748 | else |
| 1749 | monitor_expect_prompt (NULL, 0); /* get response */ |
| 1750 | |
| 1751 | p = membuf; |
| 1752 | val = strtoul (membuf, &p, 16); |
| 1753 | |
| 1754 | if (val == 0 && membuf == p) |
| 1755 | monitor_error ("monitor_read_memory_single", |
| 1756 | "bad value from monitor", |
| 1757 | memaddr, 0, membuf, 0); |
| 1758 | |
| 1759 | /* supply register stores in target byte order, so swap here */ |
| 1760 | |
| 1761 | store_unsigned_integer (myaddr, len, val); |
| 1762 | |
| 1763 | return len; |
| 1764 | } |
| 1765 | |
| 1766 | /* Copy LEN bytes of data from debugger memory at MYADDR to inferior's |
| 1767 | memory at MEMADDR. Returns length moved. Currently, we do no more |
| 1768 | than 16 bytes at a time. */ |
| 1769 | |
| 1770 | static int |
| 1771 | monitor_read_memory (CORE_ADDR memaddr, char *myaddr, int len) |
| 1772 | { |
| 1773 | unsigned int val; |
| 1774 | char buf[512]; |
| 1775 | char *p, *p1; |
| 1776 | int resp_len; |
| 1777 | int i; |
| 1778 | CORE_ADDR dumpaddr; |
| 1779 | |
| 1780 | if (len <= 0) |
| 1781 | { |
| 1782 | monitor_debug ("Zero length call to monitor_read_memory\n"); |
| 1783 | return 0; |
| 1784 | } |
| 1785 | |
| 1786 | monitor_debug ("MON read block ta(%s) ha(%lx) %d\n", |
| 1787 | paddr_nz (memaddr), (long) myaddr, len); |
| 1788 | |
| 1789 | if (current_monitor->flags & MO_ADDR_BITS_REMOVE) |
| 1790 | memaddr = gdbarch_addr_bits_remove (current_gdbarch, memaddr); |
| 1791 | |
| 1792 | if (current_monitor->flags & MO_GETMEM_READ_SINGLE) |
| 1793 | return monitor_read_memory_single (memaddr, myaddr, len); |
| 1794 | |
| 1795 | len = min (len, 16); |
| 1796 | |
| 1797 | /* Some dumpers align the first data with the preceeding 16 |
| 1798 | byte boundary. Some print blanks and start at the |
| 1799 | requested boundary. EXACT_DUMPADDR |
| 1800 | */ |
| 1801 | |
| 1802 | dumpaddr = (current_monitor->flags & MO_EXACT_DUMPADDR) |
| 1803 | ? memaddr : memaddr & ~0x0f; |
| 1804 | |
| 1805 | /* See if xfer would cross a 16 byte boundary. If so, clip it. */ |
| 1806 | if (((memaddr ^ (memaddr + len - 1)) & ~0xf) != 0) |
| 1807 | len = ((memaddr + len) & ~0xf) - memaddr; |
| 1808 | |
| 1809 | /* send the memory examine command */ |
| 1810 | |
| 1811 | if (current_monitor->flags & MO_GETMEM_NEEDS_RANGE) |
| 1812 | monitor_printf (current_monitor->getmem.cmdb, memaddr, memaddr + len); |
| 1813 | else if (current_monitor->flags & MO_GETMEM_16_BOUNDARY) |
| 1814 | monitor_printf (current_monitor->getmem.cmdb, dumpaddr); |
| 1815 | else |
| 1816 | monitor_printf (current_monitor->getmem.cmdb, memaddr, len); |
| 1817 | |
| 1818 | /* If TERM is present, we wait for that to show up. Also, (if TERM |
| 1819 | is present), we will send TERM_CMD if that is present. In any |
| 1820 | case, we collect all of the output into buf, and then wait for |
| 1821 | the normal prompt. */ |
| 1822 | |
| 1823 | if (current_monitor->getmem.term) |
| 1824 | { |
| 1825 | resp_len = monitor_expect (current_monitor->getmem.term, buf, sizeof buf); /* get response */ |
| 1826 | |
| 1827 | if (resp_len <= 0) |
| 1828 | monitor_error ("monitor_read_memory", |
| 1829 | "excessive response from monitor", |
| 1830 | memaddr, resp_len, buf, 0); |
| 1831 | |
| 1832 | if (current_monitor->getmem.term_cmd) |
| 1833 | { |
| 1834 | serial_write (monitor_desc, current_monitor->getmem.term_cmd, |
| 1835 | strlen (current_monitor->getmem.term_cmd)); |
| 1836 | monitor_expect_prompt (NULL, 0); |
| 1837 | } |
| 1838 | } |
| 1839 | else |
| 1840 | resp_len = monitor_expect_prompt (buf, sizeof buf); /* get response */ |
| 1841 | |
| 1842 | p = buf; |
| 1843 | |
| 1844 | /* If RESP_DELIM is specified, we search for that as a leading |
| 1845 | delimiter for the values. Otherwise, we just start searching |
| 1846 | from the start of the buf. */ |
| 1847 | |
| 1848 | if (current_monitor->getmem.resp_delim) |
| 1849 | { |
| 1850 | int retval, tmp; |
| 1851 | struct re_registers resp_strings; |
| 1852 | monitor_debug ("MON getmem.resp_delim %s\n", current_monitor->getmem.resp_delim); |
| 1853 | |
| 1854 | memset (&resp_strings, 0, sizeof (struct re_registers)); |
| 1855 | tmp = strlen (p); |
| 1856 | retval = re_search (&getmem_resp_delim_pattern, p, tmp, 0, tmp, |
| 1857 | &resp_strings); |
| 1858 | |
| 1859 | if (retval < 0) |
| 1860 | monitor_error ("monitor_read_memory", |
| 1861 | "bad response from monitor", |
| 1862 | memaddr, resp_len, buf, 0); |
| 1863 | |
| 1864 | p += resp_strings.end[0]; |
| 1865 | #if 0 |
| 1866 | p = strstr (p, current_monitor->getmem.resp_delim); |
| 1867 | if (!p) |
| 1868 | monitor_error ("monitor_read_memory", |
| 1869 | "bad response from monitor", |
| 1870 | memaddr, resp_len, buf, 0); |
| 1871 | p += strlen (current_monitor->getmem.resp_delim); |
| 1872 | #endif |
| 1873 | } |
| 1874 | monitor_debug ("MON scanning %d ,%lx '%s'\n", len, (long) p, p); |
| 1875 | if (current_monitor->flags & MO_GETMEM_16_BOUNDARY) |
| 1876 | { |
| 1877 | char c; |
| 1878 | int fetched = 0; |
| 1879 | i = len; |
| 1880 | c = *p; |
| 1881 | |
| 1882 | |
| 1883 | while (!(c == '\000' || c == '\n' || c == '\r') && i > 0) |
| 1884 | { |
| 1885 | if (isxdigit (c)) |
| 1886 | { |
| 1887 | if ((dumpaddr >= memaddr) && (i > 0)) |
| 1888 | { |
| 1889 | val = fromhex (c) * 16 + fromhex (*(p + 1)); |
| 1890 | *myaddr++ = val; |
| 1891 | if (monitor_debug_p || remote_debug) |
| 1892 | fprintf_unfiltered (gdb_stdlog, "[%02x]", val); |
| 1893 | --i; |
| 1894 | fetched++; |
| 1895 | } |
| 1896 | ++dumpaddr; |
| 1897 | ++p; |
| 1898 | } |
| 1899 | ++p; /* skip a blank or other non hex char */ |
| 1900 | c = *p; |
| 1901 | } |
| 1902 | if (fetched == 0) |
| 1903 | error (_("Failed to read via monitor")); |
| 1904 | if (monitor_debug_p || remote_debug) |
| 1905 | fprintf_unfiltered (gdb_stdlog, "\n"); |
| 1906 | return fetched; /* Return the number of bytes actually read */ |
| 1907 | } |
| 1908 | monitor_debug ("MON scanning bytes\n"); |
| 1909 | |
| 1910 | for (i = len; i > 0; i--) |
| 1911 | { |
| 1912 | /* Skip non-hex chars, but bomb on end of string and newlines */ |
| 1913 | |
| 1914 | while (1) |
| 1915 | { |
| 1916 | if (isxdigit (*p)) |
| 1917 | break; |
| 1918 | |
| 1919 | if (*p == '\000' || *p == '\n' || *p == '\r') |
| 1920 | monitor_error ("monitor_read_memory", |
| 1921 | "badly terminated response from monitor", |
| 1922 | memaddr, resp_len, buf, 0); |
| 1923 | p++; |
| 1924 | } |
| 1925 | |
| 1926 | val = strtoul (p, &p1, 16); |
| 1927 | |
| 1928 | if (val == 0 && p == p1) |
| 1929 | monitor_error ("monitor_read_memory", |
| 1930 | "bad value from monitor", |
| 1931 | memaddr, resp_len, buf, 0); |
| 1932 | |
| 1933 | *myaddr++ = val; |
| 1934 | |
| 1935 | if (i == 1) |
| 1936 | break; |
| 1937 | |
| 1938 | p = p1; |
| 1939 | } |
| 1940 | |
| 1941 | return len; |
| 1942 | } |
| 1943 | |
| 1944 | /* Transfer LEN bytes between target address MEMADDR and GDB address |
| 1945 | MYADDR. Returns 0 for success, errno code for failure. TARGET is |
| 1946 | unused. */ |
| 1947 | |
| 1948 | static int |
| 1949 | monitor_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write, |
| 1950 | struct mem_attrib *attrib, struct target_ops *target) |
| 1951 | { |
| 1952 | int res; |
| 1953 | |
| 1954 | if (write) |
| 1955 | { |
| 1956 | if (current_monitor->flags & MO_HAS_BLOCKWRITES) |
| 1957 | res = monitor_write_memory_block(memaddr, myaddr, len); |
| 1958 | else |
| 1959 | res = monitor_write_memory(memaddr, myaddr, len); |
| 1960 | } |
| 1961 | else |
| 1962 | { |
| 1963 | res = monitor_read_memory(memaddr, myaddr, len); |
| 1964 | } |
| 1965 | |
| 1966 | return res; |
| 1967 | } |
| 1968 | |
| 1969 | static void |
| 1970 | monitor_kill (void) |
| 1971 | { |
| 1972 | return; /* ignore attempts to kill target system */ |
| 1973 | } |
| 1974 | |
| 1975 | /* All we actually do is set the PC to the start address of exec_bfd. */ |
| 1976 | |
| 1977 | static void |
| 1978 | monitor_create_inferior (char *exec_file, char *args, char **env, |
| 1979 | int from_tty) |
| 1980 | { |
| 1981 | if (args && (*args != '\000')) |
| 1982 | error (_("Args are not supported by the monitor.")); |
| 1983 | |
| 1984 | first_time = 1; |
| 1985 | clear_proceed_status (); |
| 1986 | write_pc (bfd_get_start_address (exec_bfd)); |
| 1987 | } |
| 1988 | |
| 1989 | /* Clean up when a program exits. |
| 1990 | The program actually lives on in the remote processor's RAM, and may be |
| 1991 | run again without a download. Don't leave it full of breakpoint |
| 1992 | instructions. */ |
| 1993 | |
| 1994 | static void |
| 1995 | monitor_mourn_inferior (void) |
| 1996 | { |
| 1997 | unpush_target (targ_ops); |
| 1998 | generic_mourn_inferior (); /* Do all the proper things now */ |
| 1999 | } |
| 2000 | |
| 2001 | /* Tell the monitor to add a breakpoint. */ |
| 2002 | |
| 2003 | static int |
| 2004 | monitor_insert_breakpoint (struct bp_target_info *bp_tgt) |
| 2005 | { |
| 2006 | CORE_ADDR addr = bp_tgt->placed_address; |
| 2007 | int i; |
| 2008 | const unsigned char *bp; |
| 2009 | int bplen; |
| 2010 | |
| 2011 | monitor_debug ("MON inst bkpt %s\n", paddr (addr)); |
| 2012 | if (current_monitor->set_break == NULL) |
| 2013 | error (_("No set_break defined for this monitor")); |
| 2014 | |
| 2015 | if (current_monitor->flags & MO_ADDR_BITS_REMOVE) |
| 2016 | addr = gdbarch_addr_bits_remove (current_gdbarch, addr); |
| 2017 | |
| 2018 | /* Determine appropriate breakpoint size for this address. */ |
| 2019 | bp = gdbarch_breakpoint_from_pc (current_gdbarch, &addr, &bplen); |
| 2020 | bp_tgt->placed_address = addr; |
| 2021 | bp_tgt->placed_size = bplen; |
| 2022 | |
| 2023 | for (i = 0; i < current_monitor->num_breakpoints; i++) |
| 2024 | { |
| 2025 | if (breakaddr[i] == 0) |
| 2026 | { |
| 2027 | breakaddr[i] = addr; |
| 2028 | monitor_printf (current_monitor->set_break, addr); |
| 2029 | monitor_expect_prompt (NULL, 0); |
| 2030 | return 0; |
| 2031 | } |
| 2032 | } |
| 2033 | |
| 2034 | error (_("Too many breakpoints (> %d) for monitor."), current_monitor->num_breakpoints); |
| 2035 | } |
| 2036 | |
| 2037 | /* Tell the monitor to remove a breakpoint. */ |
| 2038 | |
| 2039 | static int |
| 2040 | monitor_remove_breakpoint (struct bp_target_info *bp_tgt) |
| 2041 | { |
| 2042 | CORE_ADDR addr = bp_tgt->placed_address; |
| 2043 | int i; |
| 2044 | |
| 2045 | monitor_debug ("MON rmbkpt %s\n", paddr (addr)); |
| 2046 | if (current_monitor->clr_break == NULL) |
| 2047 | error (_("No clr_break defined for this monitor")); |
| 2048 | |
| 2049 | for (i = 0; i < current_monitor->num_breakpoints; i++) |
| 2050 | { |
| 2051 | if (breakaddr[i] == addr) |
| 2052 | { |
| 2053 | breakaddr[i] = 0; |
| 2054 | /* some monitors remove breakpoints based on the address */ |
| 2055 | if (current_monitor->flags & MO_CLR_BREAK_USES_ADDR) |
| 2056 | monitor_printf (current_monitor->clr_break, addr); |
| 2057 | else if (current_monitor->flags & MO_CLR_BREAK_1_BASED) |
| 2058 | monitor_printf (current_monitor->clr_break, i + 1); |
| 2059 | else |
| 2060 | monitor_printf (current_monitor->clr_break, i); |
| 2061 | monitor_expect_prompt (NULL, 0); |
| 2062 | return 0; |
| 2063 | } |
| 2064 | } |
| 2065 | fprintf_unfiltered (gdb_stderr, |
| 2066 | "Can't find breakpoint associated with 0x%s\n", |
| 2067 | paddr_nz (addr)); |
| 2068 | return 1; |
| 2069 | } |
| 2070 | |
| 2071 | /* monitor_wait_srec_ack -- wait for the target to send an acknowledgement for |
| 2072 | an S-record. Return non-zero if the ACK is received properly. */ |
| 2073 | |
| 2074 | static int |
| 2075 | monitor_wait_srec_ack (void) |
| 2076 | { |
| 2077 | int ch; |
| 2078 | |
| 2079 | if (current_monitor->flags & MO_SREC_ACK_PLUS) |
| 2080 | { |
| 2081 | return (readchar (timeout) == '+'); |
| 2082 | } |
| 2083 | else if (current_monitor->flags & MO_SREC_ACK_ROTATE) |
| 2084 | { |
| 2085 | /* Eat two backspaces, a "rotating" char (|/-\), and a space. */ |
| 2086 | if ((ch = readchar (1)) < 0) |
| 2087 | return 0; |
| 2088 | if ((ch = readchar (1)) < 0) |
| 2089 | return 0; |
| 2090 | if ((ch = readchar (1)) < 0) |
| 2091 | return 0; |
| 2092 | if ((ch = readchar (1)) < 0) |
| 2093 | return 0; |
| 2094 | } |
| 2095 | return 1; |
| 2096 | } |
| 2097 | |
| 2098 | /* monitor_load -- download a file. */ |
| 2099 | |
| 2100 | static void |
| 2101 | monitor_load (char *file, int from_tty) |
| 2102 | { |
| 2103 | monitor_debug ("MON load\n"); |
| 2104 | |
| 2105 | if (current_monitor->load_routine) |
| 2106 | current_monitor->load_routine (monitor_desc, file, hashmark); |
| 2107 | else |
| 2108 | { /* The default is ascii S-records */ |
| 2109 | int n; |
| 2110 | unsigned long load_offset; |
| 2111 | char buf[128]; |
| 2112 | |
| 2113 | /* enable user to specify address for downloading as 2nd arg to load */ |
| 2114 | n = sscanf (file, "%s 0x%lx", buf, &load_offset); |
| 2115 | if (n > 1) |
| 2116 | file = buf; |
| 2117 | else |
| 2118 | load_offset = 0; |
| 2119 | |
| 2120 | monitor_printf (current_monitor->load); |
| 2121 | if (current_monitor->loadresp) |
| 2122 | monitor_expect (current_monitor->loadresp, NULL, 0); |
| 2123 | |
| 2124 | load_srec (monitor_desc, file, (bfd_vma) load_offset, |
| 2125 | 32, SREC_ALL, hashmark, |
| 2126 | current_monitor->flags & MO_SREC_ACK ? |
| 2127 | monitor_wait_srec_ack : NULL); |
| 2128 | |
| 2129 | monitor_expect_prompt (NULL, 0); |
| 2130 | } |
| 2131 | |
| 2132 | /* Finally, make the PC point at the start address */ |
| 2133 | if (exec_bfd) |
| 2134 | write_pc (bfd_get_start_address (exec_bfd)); |
| 2135 | |
| 2136 | /* There used to be code here which would clear inferior_ptid and |
| 2137 | call clear_symtab_users. None of that should be necessary: |
| 2138 | monitor targets should behave like remote protocol targets, and |
| 2139 | since generic_load does none of those things, this function |
| 2140 | shouldn't either. |
| 2141 | |
| 2142 | Furthermore, clearing inferior_ptid is *incorrect*. After doing |
| 2143 | a load, we still have a valid connection to the monitor, with a |
| 2144 | live processor state to fiddle with. The user can type |
| 2145 | `continue' or `jump *start' and make the program run. If they do |
| 2146 | these things, however, GDB will be talking to a running program |
| 2147 | while inferior_ptid is null_ptid; this makes things like |
| 2148 | reinit_frame_cache very confused. */ |
| 2149 | } |
| 2150 | |
| 2151 | static void |
| 2152 | monitor_stop (void) |
| 2153 | { |
| 2154 | monitor_debug ("MON stop\n"); |
| 2155 | if ((current_monitor->flags & MO_SEND_BREAK_ON_STOP) != 0) |
| 2156 | serial_send_break (monitor_desc); |
| 2157 | if (current_monitor->stop) |
| 2158 | monitor_printf_noecho (current_monitor->stop); |
| 2159 | } |
| 2160 | |
| 2161 | /* Put a COMMAND string out to MONITOR. Output from MONITOR is placed |
| 2162 | in OUTPUT until the prompt is seen. FIXME: We read the characters |
| 2163 | ourseleves here cause of a nasty echo. */ |
| 2164 | |
| 2165 | static void |
| 2166 | monitor_rcmd (char *command, |
| 2167 | struct ui_file *outbuf) |
| 2168 | { |
| 2169 | char *p; |
| 2170 | int resp_len; |
| 2171 | char buf[1000]; |
| 2172 | |
| 2173 | if (monitor_desc == NULL) |
| 2174 | error (_("monitor target not open.")); |
| 2175 | |
| 2176 | p = current_monitor->prompt; |
| 2177 | |
| 2178 | /* Send the command. Note that if no args were supplied, then we're |
| 2179 | just sending the monitor a newline, which is sometimes useful. */ |
| 2180 | |
| 2181 | monitor_printf ("%s\r", (command ? command : "")); |
| 2182 | |
| 2183 | resp_len = monitor_expect_prompt (buf, sizeof buf); |
| 2184 | |
| 2185 | fputs_unfiltered (buf, outbuf); /* Output the response */ |
| 2186 | } |
| 2187 | |
| 2188 | /* Convert hex digit A to a number. */ |
| 2189 | |
| 2190 | #if 0 |
| 2191 | static int |
| 2192 | from_hex (int a) |
| 2193 | { |
| 2194 | if (a >= '0' && a <= '9') |
| 2195 | return a - '0'; |
| 2196 | if (a >= 'a' && a <= 'f') |
| 2197 | return a - 'a' + 10; |
| 2198 | if (a >= 'A' && a <= 'F') |
| 2199 | return a - 'A' + 10; |
| 2200 | |
| 2201 | error (_("Reply contains invalid hex digit 0x%x"), a); |
| 2202 | } |
| 2203 | #endif |
| 2204 | |
| 2205 | char * |
| 2206 | monitor_get_dev_name (void) |
| 2207 | { |
| 2208 | return dev_name; |
| 2209 | } |
| 2210 | |
| 2211 | static struct target_ops monitor_ops; |
| 2212 | |
| 2213 | static void |
| 2214 | init_base_monitor_ops (void) |
| 2215 | { |
| 2216 | monitor_ops.to_close = monitor_close; |
| 2217 | monitor_ops.to_detach = monitor_detach; |
| 2218 | monitor_ops.to_resume = monitor_resume; |
| 2219 | monitor_ops.to_wait = monitor_wait; |
| 2220 | monitor_ops.to_fetch_registers = monitor_fetch_registers; |
| 2221 | monitor_ops.to_store_registers = monitor_store_registers; |
| 2222 | monitor_ops.to_prepare_to_store = monitor_prepare_to_store; |
| 2223 | monitor_ops.deprecated_xfer_memory = monitor_xfer_memory; |
| 2224 | monitor_ops.to_files_info = monitor_files_info; |
| 2225 | monitor_ops.to_insert_breakpoint = monitor_insert_breakpoint; |
| 2226 | monitor_ops.to_remove_breakpoint = monitor_remove_breakpoint; |
| 2227 | monitor_ops.to_kill = monitor_kill; |
| 2228 | monitor_ops.to_load = monitor_load; |
| 2229 | monitor_ops.to_create_inferior = monitor_create_inferior; |
| 2230 | monitor_ops.to_mourn_inferior = monitor_mourn_inferior; |
| 2231 | monitor_ops.to_stop = monitor_stop; |
| 2232 | monitor_ops.to_rcmd = monitor_rcmd; |
| 2233 | monitor_ops.to_stratum = process_stratum; |
| 2234 | monitor_ops.to_has_all_memory = 1; |
| 2235 | monitor_ops.to_has_memory = 1; |
| 2236 | monitor_ops.to_has_stack = 1; |
| 2237 | monitor_ops.to_has_registers = 1; |
| 2238 | monitor_ops.to_has_execution = 1; |
| 2239 | monitor_ops.to_magic = OPS_MAGIC; |
| 2240 | } /* init_base_monitor_ops */ |
| 2241 | |
| 2242 | /* Init the target_ops structure pointed at by OPS */ |
| 2243 | |
| 2244 | void |
| 2245 | init_monitor_ops (struct target_ops *ops) |
| 2246 | { |
| 2247 | if (monitor_ops.to_magic != OPS_MAGIC) |
| 2248 | init_base_monitor_ops (); |
| 2249 | |
| 2250 | memcpy (ops, &monitor_ops, sizeof monitor_ops); |
| 2251 | } |
| 2252 | |
| 2253 | /* Define additional commands that are usually only used by monitors. */ |
| 2254 | |
| 2255 | extern initialize_file_ftype _initialize_remote_monitors; /* -Wmissing-prototypes */ |
| 2256 | |
| 2257 | void |
| 2258 | _initialize_remote_monitors (void) |
| 2259 | { |
| 2260 | init_base_monitor_ops (); |
| 2261 | add_setshow_boolean_cmd ("hash", no_class, &hashmark, _("\ |
| 2262 | Set display of activity while downloading a file."), _("\ |
| 2263 | Show display of activity while downloading a file."), _("\ |
| 2264 | When enabled, a hashmark \'#\' is displayed."), |
| 2265 | NULL, |
| 2266 | NULL, /* FIXME: i18n: */ |
| 2267 | &setlist, &showlist); |
| 2268 | |
| 2269 | add_setshow_zinteger_cmd ("monitor", no_class, &monitor_debug_p, _("\ |
| 2270 | Set debugging of remote monitor communication."), _("\ |
| 2271 | Show debugging of remote monitor communication."), _("\ |
| 2272 | When enabled, communication between GDB and the remote monitor\n\ |
| 2273 | is displayed."), |
| 2274 | NULL, |
| 2275 | NULL, /* FIXME: i18n: */ |
| 2276 | &setdebuglist, &showdebuglist); |
| 2277 | } |