| 1 | /* This file is part of GDB. |
| 2 | |
| 3 | This program is free software; you can redistribute it and/or modify |
| 4 | it under the terms of the GNU General Public License as published by |
| 5 | the Free Software Foundation; either version 2 of the License, or |
| 6 | (at your option) any later version. |
| 7 | |
| 8 | This program is distributed in the hope that it will be useful, |
| 9 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | GNU General Public License for more details. |
| 12 | |
| 13 | You should have received a copy of the GNU General Public License |
| 14 | along with this program; if not, write to the Free Software |
| 15 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 16 | |
| 17 | /* This started out life as code shared between the nindy monitor and |
| 18 | GDB. For various reasons, this is no longer true. Eventually, it |
| 19 | probably should be merged into remote-nindy.c. */ |
| 20 | |
| 21 | /****************************************************************************** |
| 22 | * |
| 23 | * NINDY INTERFACE ROUTINES |
| 24 | * |
| 25 | * The caller of these routines should be aware that: |
| 26 | * |
| 27 | * (1) ninConnect() should be called to open communications with the |
| 28 | * remote NINDY board before any of the other routines are invoked. |
| 29 | * |
| 30 | * (2) almost all interactions are driven by the host: nindy sends information |
| 31 | * in response to host commands. |
| 32 | * |
| 33 | * (3) the lone exception to (2) is the single character DLE (^P, 0x10). |
| 34 | * Receipt of a DLE from NINDY indicates that the application program |
| 35 | * running under NINDY has stopped execution and that NINDY is now |
| 36 | * available to talk to the host (all other communication received after |
| 37 | * the application has been started should be presumed to come from the |
| 38 | * application and should be passed on by the host to stdout). |
| 39 | * |
| 40 | * (4) the reason the application program stopped can be determined with the |
| 41 | * ninStopWhy() function. There are three classes of stop reasons: |
| 42 | * |
| 43 | * (a) the application has terminated execution. |
| 44 | * The host should take appropriate action. |
| 45 | * |
| 46 | * (b) the application had a fault or trace event. |
| 47 | * The host should take appropriate action. |
| 48 | * |
| 49 | * (c) the application wishes to make a service request (srq) of the host; |
| 50 | * e.g., to open/close a file, read/write a file, etc. The ninSrq() |
| 51 | * function should be called to determine the nature of the request |
| 52 | * and process it. |
| 53 | */ |
| 54 | |
| 55 | #include <stdio.h> |
| 56 | #include "defs.h" |
| 57 | #include "serial.h" |
| 58 | #ifdef ANSI_PROTOTYPES |
| 59 | #include <stdarg.h> |
| 60 | #else |
| 61 | #include <varargs.h> |
| 62 | #endif |
| 63 | |
| 64 | #if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY) |
| 65 | #define HAVE_SGTTY |
| 66 | #endif |
| 67 | |
| 68 | #ifdef HAVE_SGTTY |
| 69 | #include <sys/ioctl.h> |
| 70 | #endif |
| 71 | |
| 72 | #include <sys/types.h> /* Needed by file.h on Sys V */ |
| 73 | #include <sys/file.h> |
| 74 | #include <signal.h> |
| 75 | #include <sys/stat.h> |
| 76 | |
| 77 | #if 0 |
| 78 | #include "ttycntl.h" |
| 79 | #endif |
| 80 | #include "block_io.h" |
| 81 | #include "wait.h" |
| 82 | #include "env.h" |
| 83 | |
| 84 | #define DLE 0x10 /* ^P */ |
| 85 | #define XON 0x11 /* ^Q */ |
| 86 | #define XOFF 0x13 /* ^S */ |
| 87 | #define ESC 0x1b |
| 88 | |
| 89 | #define TIMEOUT -1 |
| 90 | |
| 91 | int quiet = 0; /* 1 => stifle unnecessary messages */ |
| 92 | serial_t nindy_serial; |
| 93 | |
| 94 | static int old_nindy = 0; /* 1 => use old (hex) communication protocol */ |
| 95 | static ninStrGet(); |
| 96 | \f |
| 97 | /**************************** |
| 98 | * * |
| 99 | * MISCELLANEOUS UTILTIES * |
| 100 | * * |
| 101 | ****************************/ |
| 102 | |
| 103 | /****************************************************************************** |
| 104 | * say: |
| 105 | * This is a printf that takes at most two arguments (in addition to the |
| 106 | * format string) and that outputs nothing if verbose output has been |
| 107 | * suppressed. |
| 108 | *****************************************************************************/ |
| 109 | |
| 110 | /* VARARGS */ |
| 111 | static void |
| 112 | #ifdef ANSI_PROTOTYPES |
| 113 | say (char *fmt, ...) |
| 114 | #else |
| 115 | say (va_alist) |
| 116 | va_dcl |
| 117 | #endif |
| 118 | { |
| 119 | va_list args; |
| 120 | #ifdef ANSI_PROTOTYPES |
| 121 | va_start(args, fmt); |
| 122 | #else |
| 123 | char *fmt; |
| 124 | |
| 125 | va_start (args); |
| 126 | fmt = va_arg (args, char *); |
| 127 | #endif |
| 128 | |
| 129 | if (!quiet) |
| 130 | { |
| 131 | vfprintf_unfiltered (gdb_stdout, fmt, args); |
| 132 | gdb_flush (gdb_stdout); |
| 133 | } |
| 134 | va_end (args); |
| 135 | } |
| 136 | |
| 137 | /****************************************************************************** |
| 138 | * exists: |
| 139 | * Creates a full pathname by concatenating up to three name components |
| 140 | * onto a specified base name; optionally looks up the base name as a |
| 141 | * runtime environment variable; and checks to see if the file or |
| 142 | * directory specified by the pathname actually exists. |
| 143 | * |
| 144 | * Returns: the full pathname if it exists, NULL otherwise. |
| 145 | * (returned pathname is in malloc'd memory and must be freed |
| 146 | * by caller). |
| 147 | *****************************************************************************/ |
| 148 | static char * |
| 149 | exists( base, c1, c2, c3, env ) |
| 150 | char *base; /* Base directory of path */ |
| 151 | char *c1, *c2, *c3; /* Components (subdirectories and/or file name) to be |
| 152 | * appended onto the base directory name. One or |
| 153 | * more may be omitted by passing NULL pointers. |
| 154 | */ |
| 155 | int env; /* If 1, '*base' is the name of an environment variable |
| 156 | * to be examined for the base directory name; |
| 157 | * otherwise, '*base' is the actual name of the |
| 158 | * base directory. |
| 159 | */ |
| 160 | { |
| 161 | struct stat buf;/* For call to 'stat' -- never examined */ |
| 162 | char *path; /* Pointer to full pathname (malloc'd memory) */ |
| 163 | int len; /* Length of full pathname (incl. terminator) */ |
| 164 | extern char *getenv(); |
| 165 | |
| 166 | |
| 167 | if ( env ){ |
| 168 | base = getenv( base ); |
| 169 | if ( base == NULL ){ |
| 170 | return NULL; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | len = strlen(base) + 4; |
| 175 | /* +4 for terminator and "/" before each component */ |
| 176 | if ( c1 != NULL ){ |
| 177 | len += strlen(c1); |
| 178 | } |
| 179 | if ( c2 != NULL ){ |
| 180 | len += strlen(c2); |
| 181 | } |
| 182 | if ( c3 != NULL ){ |
| 183 | len += strlen(c3); |
| 184 | } |
| 185 | |
| 186 | path = xmalloc (len); |
| 187 | |
| 188 | strcpy( path, base ); |
| 189 | if ( c1 != NULL ){ |
| 190 | strcat( path, "/" ); |
| 191 | strcat( path, c1 ); |
| 192 | if ( c2 != NULL ){ |
| 193 | strcat( path, "/" ); |
| 194 | strcat( path, c2 ); |
| 195 | if ( c3 != NULL ){ |
| 196 | strcat( path, "/" ); |
| 197 | strcat( path, c3 ); |
| 198 | } |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | if ( stat(path,&buf) != 0 ){ |
| 203 | free( path ); |
| 204 | path = NULL; |
| 205 | } |
| 206 | return path; |
| 207 | } |
| 208 | \f |
| 209 | /***************************** |
| 210 | * * |
| 211 | * LOW-LEVEL COMMUNICATION * |
| 212 | * * |
| 213 | *****************************/ |
| 214 | |
| 215 | /* Read *exactly* N characters from the NINDY tty, and put them in |
| 216 | *BUF. Translate escape sequences into single characters, counting |
| 217 | each such sequence as 1 character. |
| 218 | |
| 219 | An escape sequence consists of ESC and a following character. The |
| 220 | ESC is discarded and the other character gets bit 0x40 cleared -- |
| 221 | thus ESC P == ^P, ESC S == ^S, ESC [ == ESC, etc. |
| 222 | |
| 223 | Return 1 if successful, 0 if more than TIMEOUT seconds pass without |
| 224 | any input. */ |
| 225 | |
| 226 | static int |
| 227 | rdnin (buf,n,timeout) |
| 228 | unsigned char * buf; /* Where to place characters read */ |
| 229 | int n; /* Number of characters to read */ |
| 230 | int timeout; /* Timeout, in seconds */ |
| 231 | { |
| 232 | int escape_seen; /* 1 => last character of a read was an ESC */ |
| 233 | int c; |
| 234 | |
| 235 | escape_seen = 0; |
| 236 | while (n) |
| 237 | { |
| 238 | c = SERIAL_READCHAR (nindy_serial, timeout); |
| 239 | switch (c) |
| 240 | { |
| 241 | case SERIAL_ERROR: |
| 242 | case SERIAL_TIMEOUT: |
| 243 | case SERIAL_EOF: |
| 244 | return 0; |
| 245 | |
| 246 | case ESC: |
| 247 | escape_seen = 1; |
| 248 | break; |
| 249 | |
| 250 | default: |
| 251 | if (escape_seen) |
| 252 | { |
| 253 | escape_seen = 0; |
| 254 | c &= ~0x40; |
| 255 | } |
| 256 | *buf++ = c; |
| 257 | --n; |
| 258 | break; |
| 259 | } |
| 260 | } |
| 261 | return 1; |
| 262 | } |
| 263 | |
| 264 | |
| 265 | /****************************************************************************** |
| 266 | * getpkt: |
| 267 | * Read a packet from a remote NINDY, with error checking, into the |
| 268 | * indicated buffer. |
| 269 | * |
| 270 | * Return packet status byte on success, TIMEOUT on failure. |
| 271 | ******************************************************************************/ |
| 272 | static |
| 273 | int |
| 274 | getpkt(buf) |
| 275 | unsigned char *buf; |
| 276 | { |
| 277 | int i; |
| 278 | unsigned char hdr[3]; /* Packet header: |
| 279 | * hdr[0] = low byte of message length |
| 280 | * hdr[1] = high byte of message length |
| 281 | * hdr[2] = message status |
| 282 | */ |
| 283 | int cnt; /* Message length (status byte + data) */ |
| 284 | unsigned char cs_calc; /* Checksum calculated */ |
| 285 | unsigned char cs_recv; /* Checksum received */ |
| 286 | static char errfmt[] = |
| 287 | "Bad checksum (recv=0x%02x; calc=0x%02x); retrying\r\n"; |
| 288 | |
| 289 | while (1){ |
| 290 | if ( !rdnin(hdr,3,5) ){ |
| 291 | return TIMEOUT; |
| 292 | } |
| 293 | cnt = (hdr[1]<<8) + hdr[0] - 1; |
| 294 | /* -1 for status byte (already read) */ |
| 295 | |
| 296 | /* Caller's buffer may only be big enough for message body, |
| 297 | * without status byte and checksum, so make sure to read |
| 298 | * checksum into a separate buffer. |
| 299 | */ |
| 300 | if ( !rdnin(buf,cnt,5) || !rdnin(&cs_recv,1,5) ){ |
| 301 | return TIMEOUT; |
| 302 | } |
| 303 | |
| 304 | /* Calculate checksum |
| 305 | */ |
| 306 | cs_calc = hdr[0] + hdr[1] + hdr[2]; |
| 307 | for ( i = 0; i < cnt; i++ ){ |
| 308 | cs_calc += buf[i]; |
| 309 | } |
| 310 | if ( cs_calc == cs_recv ){ |
| 311 | SERIAL_WRITE (nindy_serial, "+", 1); |
| 312 | return hdr[2]; |
| 313 | } |
| 314 | |
| 315 | /* Bad checksum: report, send NAK, and re-receive |
| 316 | */ |
| 317 | fprintf(stderr, errfmt, cs_recv, cs_calc ); |
| 318 | SERIAL_WRITE (nindy_serial, "-", 1); |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | |
| 323 | /****************************************************************************** |
| 324 | * putpkt: |
| 325 | * Send a packet to NINDY, checksumming it and converting special |
| 326 | * characters to escape sequences. |
| 327 | ******************************************************************************/ |
| 328 | |
| 329 | /* This macro puts the character 'c' into the buffer pointed at by 'p', |
| 330 | * and increments the pointer. If 'c' is one of the 4 special characters |
| 331 | * in the transmission protocol, it is converted into a 2-character |
| 332 | * escape sequence. |
| 333 | */ |
| 334 | #define PUTBUF(c,p) \ |
| 335 | if ( c == DLE || c == ESC || c == XON || c == XOFF ){ \ |
| 336 | *p++ = ESC; \ |
| 337 | *p++ = c | 0x40; \ |
| 338 | } else { \ |
| 339 | *p++ = c; \ |
| 340 | } |
| 341 | |
| 342 | static |
| 343 | putpkt( msg, len ) |
| 344 | unsigned char *msg; /* Command to be sent, without lead ^P (\020) or checksum */ |
| 345 | int len; /* Number of bytes in message */ |
| 346 | { |
| 347 | static char *buf = NULL;/* Local buffer -- build packet here */ |
| 348 | static int maxbuf = 0; /* Current length of buffer */ |
| 349 | unsigned char ack; /* Response received from NINDY */ |
| 350 | unsigned char checksum; /* Packet checksum */ |
| 351 | char *p; /* Pointer into buffer */ |
| 352 | int lenhi, lenlo; /* High and low bytes of message length */ |
| 353 | int i; |
| 354 | |
| 355 | |
| 356 | /* Make sure local buffer is big enough. Must include space for |
| 357 | * packet length, message body, and checksum. And in the worst |
| 358 | * case, each character would expand into a 2-character escape |
| 359 | * sequence. |
| 360 | */ |
| 361 | if ( maxbuf < ((2*len)+10) ){ |
| 362 | if ( buf ){ |
| 363 | free( buf ); |
| 364 | } |
| 365 | buf = xmalloc( maxbuf=((2*len)+10) ); |
| 366 | } |
| 367 | |
| 368 | /* Attention, NINDY! |
| 369 | */ |
| 370 | SERIAL_WRITE (nindy_serial, "\020", 1); |
| 371 | |
| 372 | |
| 373 | lenlo = len & 0xff; |
| 374 | lenhi = (len>>8) & 0xff; |
| 375 | checksum = lenlo + lenhi; |
| 376 | p = buf; |
| 377 | |
| 378 | PUTBUF( lenlo, p ); |
| 379 | PUTBUF( lenhi, p ); |
| 380 | |
| 381 | for ( i=0; i<len; i++ ){ |
| 382 | PUTBUF( msg[i], p ); |
| 383 | checksum += msg[i]; |
| 384 | } |
| 385 | |
| 386 | PUTBUF( checksum, p ); |
| 387 | |
| 388 | /* Send checksummed message over and over until we get a positive ack |
| 389 | */ |
| 390 | SERIAL_WRITE (nindy_serial, buf, p - buf); |
| 391 | while (1){ |
| 392 | if ( !rdnin(&ack,1,5) ){ |
| 393 | /* timed out */ |
| 394 | fprintf(stderr,"ACK timed out; resending\r\n"); |
| 395 | /* Attention, NINDY! */ |
| 396 | SERIAL_WRITE (nindy_serial, "\020", 1); |
| 397 | SERIAL_WRITE (nindy_serial, buf, p - buf); |
| 398 | } else if ( ack == '+' ){ |
| 399 | return; |
| 400 | } else if ( ack == '-' ){ |
| 401 | fprintf( stderr, "Remote NAK; resending\r\n" ); |
| 402 | SERIAL_WRITE (nindy_serial, buf, p - buf); |
| 403 | } else { |
| 404 | fprintf( stderr, "Bad ACK, ignored: <%c>\r\n", ack ); |
| 405 | } |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | |
| 410 | |
| 411 | /****************************************************************************** |
| 412 | * send: |
| 413 | * Send a message to a remote NINDY. Check message status byte |
| 414 | * for error responses. If no error, return NINDY reponse (if any). |
| 415 | ******************************************************************************/ |
| 416 | static |
| 417 | send( out, len, in ) |
| 418 | unsigned char *out; /* Message to be sent to NINDY */ |
| 419 | int len; /* Number of meaningful bytes in out buffer */ |
| 420 | unsigned char *in; /* Where to put response received from NINDY */ |
| 421 | { |
| 422 | char *fmt; |
| 423 | int status; |
| 424 | static char *errmsg[] = { |
| 425 | "", /* 0 */ |
| 426 | "Buffer overflow", /* 1 */ |
| 427 | "Unknown command", /* 2 */ |
| 428 | "Wrong amount of data to load register(s)", /* 3 */ |
| 429 | "Missing command argument(s)", /* 4 */ |
| 430 | "Odd number of digits sent to load memory", /* 5 */ |
| 431 | "Unknown register name", /* 6 */ |
| 432 | "No such memory segment", /* 7 */ |
| 433 | "No breakpoint available", /* 8 */ |
| 434 | "Can't set requested baud rate", /* 9 */ |
| 435 | }; |
| 436 | # define NUMERRS ( sizeof(errmsg) / sizeof(errmsg[0]) ) |
| 437 | |
| 438 | static char err1[] = "Unknown error response from NINDY: #%d\r\n"; |
| 439 | static char err2[] = "Error response #%d from NINDY: %s\r\n"; |
| 440 | |
| 441 | while (1){ |
| 442 | putpkt(out,len); |
| 443 | status = getpkt(in); |
| 444 | if ( status == TIMEOUT ){ |
| 445 | fprintf( stderr, "Response timed out; resending\r\n" ); |
| 446 | } else { |
| 447 | break; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | if ( status ){ |
| 452 | fmt = status > NUMERRS ? err1 : err2; |
| 453 | fprintf( stderr, fmt, status, errmsg[status] ); |
| 454 | abort(); |
| 455 | } |
| 456 | } |
| 457 | \f |
| 458 | /************************ |
| 459 | * * |
| 460 | * BAUD RATE ROUTINES * |
| 461 | * * |
| 462 | ************************/ |
| 463 | |
| 464 | /* Table of baudrates known to be acceptable to NINDY. Each baud rate |
| 465 | * appears both as character string and as a Unix baud rate constant. |
| 466 | */ |
| 467 | struct baudrate { |
| 468 | char *string; |
| 469 | int rate; |
| 470 | }; |
| 471 | |
| 472 | static struct baudrate baudtab[] = { |
| 473 | "1200", 1200, |
| 474 | "2400", 2400, |
| 475 | "4800", 4800, |
| 476 | "9600", 9600, |
| 477 | "19200", 19200, |
| 478 | "38400", 38400, |
| 479 | NULL, 0 /* End of table */ |
| 480 | }; |
| 481 | |
| 482 | /****************************************************************************** |
| 483 | * parse_baudrate: |
| 484 | * Look up the passed baud rate in the baudrate table. If found, change |
| 485 | * our internal record of the current baud rate, but don't do anything |
| 486 | * about the tty just now. |
| 487 | * |
| 488 | * Return pointer to baudrate structure on success, NULL on failure. |
| 489 | ******************************************************************************/ |
| 490 | static |
| 491 | struct baudrate * |
| 492 | parse_baudrate(s) |
| 493 | char *s; /* Desired baud rate, as an ASCII (decimal) string */ |
| 494 | { |
| 495 | int i; |
| 496 | |
| 497 | for ( i=0; baudtab[i].string != NULL; i++ ){ |
| 498 | if ( !strcmp(baudtab[i].string,s) ){ |
| 499 | return &baudtab[i]; |
| 500 | } |
| 501 | } |
| 502 | return NULL; |
| 503 | } |
| 504 | |
| 505 | /****************************************************************************** |
| 506 | * try_baudrate: |
| 507 | * Try speaking to NINDY via the specified file descriptor at the |
| 508 | * specified baudrate. Assume success if we can send an empty command |
| 509 | * with a bogus checksum and receive a NAK (response of '-') back within |
| 510 | * one second. |
| 511 | * |
| 512 | * Return 1 on success, 0 on failure. |
| 513 | ***************************************************************************/ |
| 514 | |
| 515 | static int |
| 516 | try_baudrate (serial, brp) |
| 517 | serial_t serial; |
| 518 | struct baudrate *brp; |
| 519 | { |
| 520 | unsigned char c; |
| 521 | |
| 522 | /* Set specified baud rate and flush all pending input */ |
| 523 | SERIAL_SETBAUDRATE (serial, brp->rate); |
| 524 | tty_flush (serial); |
| 525 | |
| 526 | /* Send empty command with bad checksum, hope for NAK ('-') response */ |
| 527 | SERIAL_WRITE (serial, "\020\0\0\001", 4); |
| 528 | |
| 529 | /* Anything but a quick '-', including error, eof, or timeout, means that |
| 530 | this baudrate doesn't work. */ |
| 531 | return SERIAL_READCHAR (serial, 1) == '-'; |
| 532 | } |
| 533 | |
| 534 | /****************************************************************************** |
| 535 | * autobaud: |
| 536 | * Get NINDY talking over the specified file descriptor at the specified |
| 537 | * baud rate. First see if NINDY's already talking at 'baudrate'. If |
| 538 | * not, run through all the legal baudrates in 'baudtab' until one works, |
| 539 | * and then tell NINDY to talk at 'baudrate' instead. |
| 540 | ******************************************************************************/ |
| 541 | static |
| 542 | autobaud( serial, brp ) |
| 543 | serial_t serial; |
| 544 | struct baudrate *brp; |
| 545 | { |
| 546 | int i; |
| 547 | int failures; |
| 548 | |
| 549 | say("NINDY at wrong baud rate? Trying to autobaud...\n"); |
| 550 | failures = i = 0; |
| 551 | while (1) |
| 552 | { |
| 553 | say( "\r%s... ", baudtab[i].string ); |
| 554 | if (try_baudrate(serial, &baudtab[i])) |
| 555 | { |
| 556 | break; |
| 557 | } |
| 558 | if (baudtab[++i].string == NULL) |
| 559 | { |
| 560 | /* End of table -- wraparound */ |
| 561 | i = 0; |
| 562 | if ( failures++ ) |
| 563 | { |
| 564 | say("\nAutobaud failed again. Giving up.\n"); |
| 565 | exit(1); |
| 566 | } |
| 567 | else |
| 568 | { |
| 569 | say("\nAutobaud failed. Trying again...\n"); |
| 570 | } |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | /* Found NINDY's current baud rate; now change it. */ |
| 575 | say("Changing NINDY baudrate to %s\n", brp->string); |
| 576 | ninBaud (brp->string); |
| 577 | |
| 578 | /* Change our baud rate back to rate to which we just set NINDY. */ |
| 579 | SERIAL_SETBAUDRATE (serial, brp->rate); |
| 580 | } |
| 581 | \f |
| 582 | /********************************** |
| 583 | * * |
| 584 | * NINDY INTERFACE ROUTINES * |
| 585 | * * |
| 586 | * ninConnect *MUST* be the first * |
| 587 | * one of these routines called. * |
| 588 | **********************************/ |
| 589 | |
| 590 | |
| 591 | /****************************************************************************** |
| 592 | * ninBaud: |
| 593 | * Ask NINDY to change the baud rate on its serial port. |
| 594 | * Assumes we know the baud rate at which NINDY's currently talking. |
| 595 | ******************************************************************************/ |
| 596 | ninBaud( baudrate ) |
| 597 | char *baudrate; /* Desired baud rate, as a string of ASCII decimal |
| 598 | * digits. |
| 599 | */ |
| 600 | { |
| 601 | unsigned char msg[100]; |
| 602 | |
| 603 | tty_flush (nindy_serial); |
| 604 | |
| 605 | if (old_nindy) |
| 606 | { |
| 607 | char *p; /* Pointer into buffer */ |
| 608 | unsigned char csum; /* Calculated checksum */ |
| 609 | |
| 610 | /* Can't use putpkt() because after the baudrate change NINDY's |
| 611 | ack/nak will look like gibberish. */ |
| 612 | |
| 613 | for (p=baudrate, csum=020+'z'; *p; p++) |
| 614 | { |
| 615 | csum += *p; |
| 616 | } |
| 617 | sprintf (msg, "\020z%s#%02x", baudrate, csum); |
| 618 | SERIAL_WRITE (nindy_serial, msg, strlen (msg)); |
| 619 | } |
| 620 | else |
| 621 | { |
| 622 | /* Can't use "send" because NINDY reply will be unreadable after |
| 623 | baud rate change. */ |
| 624 | sprintf( msg, "z%s", baudrate ); |
| 625 | putpkt( msg, strlen(msg)+1 ); /* "+1" to send terminator too */ |
| 626 | } |
| 627 | } |
| 628 | |
| 629 | /****************************************************************************** |
| 630 | * ninBptDel: |
| 631 | * Ask NINDY to delete the specified type of *hardware* breakpoint at |
| 632 | * the specified address. If the 'addr' is -1, all breakpoints of |
| 633 | * the specified type are deleted. |
| 634 | ***************************************************************************/ |
| 635 | ninBptDel( addr, type ) |
| 636 | long addr; /* Address in 960 memory */ |
| 637 | char type; /* 'd' => data bkpt, 'i' => instruction breakpoint */ |
| 638 | { |
| 639 | unsigned char buf[10]; |
| 640 | |
| 641 | if ( old_nindy ){ |
| 642 | OninBptDel( addr, type == 'd' ? 1 : 0 ); |
| 643 | return; |
| 644 | } |
| 645 | |
| 646 | buf[0] = 'b'; |
| 647 | buf[1] = type; |
| 648 | |
| 649 | if ( addr == -1 ){ |
| 650 | send( buf, 2, NULL ); |
| 651 | } else { |
| 652 | store_unsigned_integer (&buf[2], 4, addr); |
| 653 | send( buf, 6, NULL ); |
| 654 | } |
| 655 | } |
| 656 | |
| 657 | |
| 658 | /****************************************************************************** |
| 659 | * ninBptSet: |
| 660 | * Ask NINDY to set the specified type of *hardware* breakpoint at |
| 661 | * the specified address. |
| 662 | ******************************************************************************/ |
| 663 | ninBptSet( addr, type ) |
| 664 | long addr; /* Address in 960 memory */ |
| 665 | char type; /* 'd' => data bkpt, 'i' => instruction breakpoint */ |
| 666 | { |
| 667 | unsigned char buf[10]; |
| 668 | |
| 669 | if ( old_nindy ){ |
| 670 | OninBptSet( addr, type == 'd' ? 1 : 0 ); |
| 671 | return; |
| 672 | } |
| 673 | |
| 674 | |
| 675 | buf[0] = 'B'; |
| 676 | buf[1] = type; |
| 677 | store_unsigned_integer (&buf[2], 4, addr); |
| 678 | send( buf, 6, NULL ); |
| 679 | } |
| 680 | |
| 681 | |
| 682 | /****************************************************************************** |
| 683 | * ninConnect: |
| 684 | * Open the specified tty. Get communications working at the specified |
| 685 | * baud rate. Flush any pending I/O on the tty. |
| 686 | * |
| 687 | * Return the file descriptor, or -1 on failure. |
| 688 | ******************************************************************************/ |
| 689 | int |
| 690 | ninConnect( name, baudrate, brk, silent, old_protocol ) |
| 691 | char *name; /* "/dev/ttyXX" to be opened */ |
| 692 | char *baudrate;/* baud rate: a string of ascii decimal digits (eg,"9600")*/ |
| 693 | int brk; /* 1 => send break to tty first thing after opening it*/ |
| 694 | int silent; /* 1 => stifle unnecessary messages when talking to |
| 695 | * this tty. |
| 696 | */ |
| 697 | int old_protocol; |
| 698 | { |
| 699 | int i; |
| 700 | char *p; |
| 701 | struct baudrate *brp; |
| 702 | |
| 703 | /* We will try each of the following paths when trying to open the tty |
| 704 | */ |
| 705 | static char *prefix[] = { "", "/dev/", "/dev/tty", NULL }; |
| 706 | |
| 707 | if ( old_protocol ){ |
| 708 | old_nindy = 1; |
| 709 | } |
| 710 | |
| 711 | quiet = silent; /* Make global to this file */ |
| 712 | |
| 713 | for ( i=0; prefix[i] != NULL; i++ ){ |
| 714 | p = xmalloc(strlen(prefix[i]) + strlen(name) + 1 ); |
| 715 | strcpy( p, prefix[i] ); |
| 716 | strcat( p, name ); |
| 717 | nindy_serial = SERIAL_OPEN (p); |
| 718 | if (nindy_serial != NULL) { |
| 719 | #ifdef TIOCEXCL |
| 720 | /* Exclusive use mode (hp9000 does not support it) */ |
| 721 | ioctl(nindy_serial->fd,TIOCEXCL,NULL); |
| 722 | #endif |
| 723 | SERIAL_RAW (nindy_serial); |
| 724 | |
| 725 | if (brk) |
| 726 | { |
| 727 | SERIAL_SEND_BREAK (nindy_serial); |
| 728 | } |
| 729 | |
| 730 | brp = parse_baudrate( baudrate ); |
| 731 | if ( brp == NULL ){ |
| 732 | say("Illegal baudrate %s ignored; using 9600\n", |
| 733 | baudrate); |
| 734 | brp = parse_baudrate( "9600" ); |
| 735 | } |
| 736 | |
| 737 | if ( !try_baudrate(nindy_serial, brp) ){ |
| 738 | autobaud(nindy_serial, brp); |
| 739 | } |
| 740 | tty_flush (nindy_serial); |
| 741 | say( "Connected to %s\n", p ); |
| 742 | free(p); |
| 743 | break; |
| 744 | } |
| 745 | free(p); |
| 746 | } |
| 747 | return 0; |
| 748 | } |
| 749 | |
| 750 | #if 0 |
| 751 | |
| 752 | /* Currently unused; shouldn't we be doing this on target_kill and |
| 753 | perhaps target_mourn? FIXME. */ |
| 754 | |
| 755 | /****************************************************************************** |
| 756 | * ninGdbExit: |
| 757 | * Ask NINDY to leave GDB mode and print a NINDY prompt. |
| 758 | ****************************************************************************/ |
| 759 | ninGdbExit() |
| 760 | { |
| 761 | if ( old_nindy ){ |
| 762 | OninGdbExit(); |
| 763 | return; |
| 764 | } |
| 765 | putpkt((unsigned char *) "E", 1 ); |
| 766 | } |
| 767 | #endif |
| 768 | |
| 769 | /****************************************************************************** |
| 770 | * ninGo: |
| 771 | * Ask NINDY to start or continue execution of an application program |
| 772 | * in it's memory at the current ip. |
| 773 | ******************************************************************************/ |
| 774 | ninGo( step_flag ) |
| 775 | int step_flag; /* 1 => run in single-step mode */ |
| 776 | { |
| 777 | if ( old_nindy ){ |
| 778 | OninGo( step_flag ); |
| 779 | return; |
| 780 | } |
| 781 | putpkt((unsigned char *) (step_flag ? "s" : "c"), 1 ); |
| 782 | } |
| 783 | |
| 784 | |
| 785 | /****************************************************************************** |
| 786 | * ninMemGet: |
| 787 | * Read a string of bytes from NINDY's address space (960 memory). |
| 788 | ******************************************************************************/ |
| 789 | int |
| 790 | ninMemGet(ninaddr, hostaddr, len) |
| 791 | long ninaddr; /* Source address, in the 960 memory space */ |
| 792 | unsigned char *hostaddr; /* Destination address, in our memory space */ |
| 793 | int len; /* Number of bytes to read */ |
| 794 | { |
| 795 | unsigned char buf[BUFSIZE+20]; |
| 796 | int cnt; /* Number of bytes in next transfer */ |
| 797 | int origlen = len; |
| 798 | |
| 799 | if ( old_nindy ){ |
| 800 | OninMemGet(ninaddr, hostaddr, len); |
| 801 | return; |
| 802 | } |
| 803 | |
| 804 | for ( ; len > 0; len -= BUFSIZE ){ |
| 805 | cnt = len > BUFSIZE ? BUFSIZE : len; |
| 806 | |
| 807 | buf[0] = 'm'; |
| 808 | store_unsigned_integer (&buf[1], 4, ninaddr); |
| 809 | buf[5] = cnt & 0xff; |
| 810 | buf[6] = (cnt>>8) & 0xff; |
| 811 | |
| 812 | send( buf, 7, hostaddr ); |
| 813 | |
| 814 | ninaddr += cnt; |
| 815 | hostaddr += cnt; |
| 816 | } |
| 817 | return origlen; |
| 818 | } |
| 819 | |
| 820 | |
| 821 | /****************************************************************************** |
| 822 | * ninMemPut: |
| 823 | * Write a string of bytes into NINDY's address space (960 memory). |
| 824 | ******************************************************************************/ |
| 825 | int |
| 826 | ninMemPut( ninaddr, hostaddr, len ) |
| 827 | long ninaddr; /* Destination address, in NINDY memory space */ |
| 828 | unsigned char *hostaddr; /* Source address, in our memory space */ |
| 829 | int len; /* Number of bytes to write */ |
| 830 | { |
| 831 | unsigned char buf[BUFSIZE+20]; |
| 832 | int cnt; /* Number of bytes in next transfer */ |
| 833 | int origlen = len; |
| 834 | |
| 835 | if ( old_nindy ){ |
| 836 | OninMemPut( ninaddr, hostaddr, len ); |
| 837 | return; |
| 838 | } |
| 839 | for ( ; len > 0; len -= BUFSIZE ){ |
| 840 | cnt = len > BUFSIZE ? BUFSIZE : len; |
| 841 | |
| 842 | buf[0] = 'M'; |
| 843 | store_unsigned_integer (&buf[1], 4, ninaddr); |
| 844 | memcpy(buf + 5, hostaddr, cnt); |
| 845 | send( buf, cnt+5, NULL ); |
| 846 | |
| 847 | ninaddr += cnt; |
| 848 | hostaddr += cnt; |
| 849 | } |
| 850 | return origlen; |
| 851 | } |
| 852 | |
| 853 | /****************************************************************************** |
| 854 | * ninRegGet: |
| 855 | * Retrieve the contents of a 960 register, and return them as a long |
| 856 | * in host byte order. |
| 857 | * |
| 858 | * THIS ROUTINE CAN ONLY BE USED TO READ THE LOCAL, GLOBAL, AND |
| 859 | * ip/ac/pc/tc REGISTERS. |
| 860 | * |
| 861 | ******************************************************************************/ |
| 862 | long |
| 863 | ninRegGet( regname ) |
| 864 | char *regname; /* Register name recognized by NINDY, subject to the |
| 865 | * above limitations. |
| 866 | */ |
| 867 | { |
| 868 | unsigned char outbuf[10]; |
| 869 | unsigned char inbuf[20]; |
| 870 | |
| 871 | if ( old_nindy ){ |
| 872 | return OninRegGet( regname ); |
| 873 | } |
| 874 | |
| 875 | sprintf( outbuf, "u%s:", regname ); |
| 876 | send( outbuf, strlen(outbuf), inbuf ); |
| 877 | return extract_unsigned_integer (inbuf, 4); |
| 878 | } |
| 879 | |
| 880 | /****************************************************************************** |
| 881 | * ninRegPut: |
| 882 | * Set the contents of a 960 register. |
| 883 | * |
| 884 | * THIS ROUTINE CAN ONLY BE USED TO SET THE LOCAL, GLOBAL, AND |
| 885 | * ip/ac/pc/tc REGISTERS. |
| 886 | * |
| 887 | ******************************************************************************/ |
| 888 | ninRegPut( regname, val ) |
| 889 | char *regname; /* Register name recognized by NINDY, subject to the |
| 890 | * above limitations. |
| 891 | */ |
| 892 | long val; /* New contents of register, in host byte-order */ |
| 893 | { |
| 894 | unsigned char buf[20]; |
| 895 | int len; |
| 896 | |
| 897 | if ( old_nindy ){ |
| 898 | OninRegPut( regname, val ); |
| 899 | return; |
| 900 | } |
| 901 | |
| 902 | sprintf( buf, "U%s:", regname ); |
| 903 | len = strlen(buf); |
| 904 | store_unsigned_integer (&buf[len], 4, val); |
| 905 | send( buf, len+4, NULL ); |
| 906 | } |
| 907 | |
| 908 | /****************************************************************************** |
| 909 | * ninRegsGet: |
| 910 | * Get a dump of the contents of the entire 960 register set. The |
| 911 | * individual registers appear in the dump in the following order: |
| 912 | * |
| 913 | * pfp sp rip r3 r4 r5 r6 r7 |
| 914 | * r8 r9 r10 r11 r12 r13 r14 r15 |
| 915 | * g0 g1 g2 g3 g4 g5 g6 g7 |
| 916 | * g8 g9 g10 g11 g12 g13 g14 fp |
| 917 | * pc ac ip tc fp0 fp1 fp2 fp3 |
| 918 | * |
| 919 | * Each individual register comprises exactly 4 bytes, except for |
| 920 | * fp0-fp3, which are 8 bytes. All register values are in 960 |
| 921 | * (little-endian) byte order. |
| 922 | * |
| 923 | ******************************************************************************/ |
| 924 | ninRegsGet( regp ) |
| 925 | unsigned char *regp; /* Where to place the register dump */ |
| 926 | { |
| 927 | if ( old_nindy ){ |
| 928 | OninRegsGet( regp ); |
| 929 | return; |
| 930 | } |
| 931 | send( (unsigned char *) "r", 1, regp ); |
| 932 | } |
| 933 | |
| 934 | |
| 935 | /****************************************************************************** |
| 936 | * ninRegsPut: |
| 937 | * Initialize the entire 960 register set to a specified set of values. |
| 938 | * The format of the register value data should be the same as that |
| 939 | * returned by ninRegsGet. |
| 940 | * |
| 941 | * WARNING: |
| 942 | * All register values must be in 960 (little-endian) byte order. |
| 943 | * |
| 944 | ******************************************************************************/ |
| 945 | ninRegsPut( regp ) |
| 946 | char *regp; /* Pointer to desired values of registers */ |
| 947 | { |
| 948 | /* Number of bytes that we send to nindy. I believe this is defined by |
| 949 | the protocol (it does not agree with REGISTER_BYTES). */ |
| 950 | #define NINDY_REGISTER_BYTES ((36*4) + (4*8)) |
| 951 | unsigned char buf[NINDY_REGISTER_BYTES+10]; |
| 952 | |
| 953 | if ( old_nindy ){ |
| 954 | OninRegsPut( regp ); |
| 955 | return; |
| 956 | } |
| 957 | |
| 958 | buf[0] = 'R'; |
| 959 | memcpy(buf+1, regp, NINDY_REGISTER_BYTES ); |
| 960 | send( buf, NINDY_REGISTER_BYTES+1, NULL ); |
| 961 | } |
| 962 | |
| 963 | |
| 964 | /****************************************************************************** |
| 965 | * ninReset: |
| 966 | * Ask NINDY to perform a soft reset; wait for the reset to complete. |
| 967 | * |
| 968 | ******************************************************************************/ |
| 969 | ninReset() |
| 970 | { |
| 971 | unsigned char ack; |
| 972 | |
| 973 | if ( old_nindy ){ |
| 974 | OninReset(); |
| 975 | return; |
| 976 | } |
| 977 | |
| 978 | while (1){ |
| 979 | putpkt((unsigned char *) "X", 1 ); |
| 980 | while (1){ |
| 981 | if ( !rdnin(&ack,1,5) ){ |
| 982 | /* Timed out */ |
| 983 | break; /* Resend */ |
| 984 | } |
| 985 | if ( ack == '+' ){ |
| 986 | return; |
| 987 | } |
| 988 | } |
| 989 | } |
| 990 | } |
| 991 | |
| 992 | |
| 993 | /****************************************************************************** |
| 994 | * ninSrq: |
| 995 | * Assume NINDY has stopped execution of the 960 application program in |
| 996 | * order to process a host service request (srq). Ask NINDY for the |
| 997 | * srq arguments, perform the requested service, and send an "srq |
| 998 | * complete" message so NINDY will return control to the application. |
| 999 | * |
| 1000 | ******************************************************************************/ |
| 1001 | ninSrq() |
| 1002 | { |
| 1003 | /* FIXME: Imposes arbitrary limits on lengths of pathnames and such. */ |
| 1004 | unsigned char buf[BUFSIZE]; |
| 1005 | int retcode; |
| 1006 | unsigned char srqnum; |
| 1007 | int i; |
| 1008 | int offset; |
| 1009 | int arg[MAX_SRQ_ARGS]; |
| 1010 | |
| 1011 | if ( old_nindy ){ |
| 1012 | OninSrq(); |
| 1013 | return; |
| 1014 | } |
| 1015 | |
| 1016 | |
| 1017 | /* Get srq number and arguments |
| 1018 | */ |
| 1019 | send((unsigned char *) "!", 1, buf ); |
| 1020 | |
| 1021 | srqnum = buf[0]; |
| 1022 | for ( i=0, offset=1; i < MAX_SRQ_ARGS; i++, offset+=4 ){ |
| 1023 | arg[i] = extract_unsigned_integer (&buf[offset], 4); |
| 1024 | } |
| 1025 | |
| 1026 | /* Process Srq |
| 1027 | */ |
| 1028 | switch( srqnum ){ |
| 1029 | case BS_CLOSE: |
| 1030 | /* args: file descriptor */ |
| 1031 | if ( arg[0] > 2 ){ |
| 1032 | retcode = close( arg[0] ); |
| 1033 | } else { |
| 1034 | retcode = 0; |
| 1035 | } |
| 1036 | break; |
| 1037 | case BS_CREAT: |
| 1038 | /* args: filename, mode */ |
| 1039 | ninStrGet( arg[0], buf ); |
| 1040 | retcode = creat(buf,arg[1]); |
| 1041 | break; |
| 1042 | case BS_OPEN: |
| 1043 | /* args: filename, flags, mode */ |
| 1044 | ninStrGet( arg[0], buf ); |
| 1045 | retcode = open(buf,arg[1],arg[2]); |
| 1046 | break; |
| 1047 | case BS_READ: |
| 1048 | /* args: file descriptor, buffer, count */ |
| 1049 | retcode = read(arg[0],buf,arg[2]); |
| 1050 | if ( retcode > 0 ){ |
| 1051 | ninMemPut( arg[1], buf, retcode ); |
| 1052 | } |
| 1053 | break; |
| 1054 | case BS_SEEK: |
| 1055 | /* args: file descriptor, offset, whence */ |
| 1056 | retcode = lseek(arg[0],arg[1],arg[2]); |
| 1057 | break; |
| 1058 | case BS_WRITE: |
| 1059 | /* args: file descriptor, buffer, count */ |
| 1060 | ninMemGet( arg[1], buf, arg[2] ); |
| 1061 | retcode = write(arg[0],buf,arg[2]); |
| 1062 | break; |
| 1063 | default: |
| 1064 | retcode = -1; |
| 1065 | break; |
| 1066 | } |
| 1067 | |
| 1068 | /* Send request termination status to NINDY |
| 1069 | */ |
| 1070 | buf[0] = 'e'; |
| 1071 | store_unsigned_integer (&buf[1], 4, retcode); |
| 1072 | send( buf, 5, NULL ); |
| 1073 | } |
| 1074 | |
| 1075 | |
| 1076 | /****************************************************************************** |
| 1077 | * ninStopWhy: |
| 1078 | * Assume the application program has stopped (i.e., a DLE was received |
| 1079 | * from NINDY). Ask NINDY for status information describing the |
| 1080 | * reason for the halt. |
| 1081 | * |
| 1082 | * Returns a non-zero value if the user program has exited, 0 otherwise. |
| 1083 | * Also returns the following information, through passed pointers: |
| 1084 | * - why: an exit code if program the exited; otherwise the reason |
| 1085 | * why the program halted (see stop.h for values). |
| 1086 | * - contents of register ip (little-endian byte order) |
| 1087 | * - contents of register sp (little-endian byte order) |
| 1088 | * - contents of register fp (little-endian byte order) |
| 1089 | ******************************************************************************/ |
| 1090 | char |
| 1091 | ninStopWhy( whyp, ipp, fpp, spp ) |
| 1092 | unsigned char *whyp; /* Return the 'why' code through this pointer */ |
| 1093 | long *ipp; /* Return contents of register ip through this pointer */ |
| 1094 | long *fpp; /* Return contents of register fp through this pointer */ |
| 1095 | long *spp; /* Return contents of register sp through this pointer */ |
| 1096 | { |
| 1097 | unsigned char buf[30]; |
| 1098 | extern char OninStopWhy (); |
| 1099 | |
| 1100 | if ( old_nindy ){ |
| 1101 | return OninStopWhy( whyp, ipp, fpp, spp ); |
| 1102 | } |
| 1103 | send((unsigned char *) "?", 1, buf ); |
| 1104 | |
| 1105 | *whyp = buf[1]; |
| 1106 | memcpy ((char *)ipp, &buf[2], sizeof (*ipp)); |
| 1107 | memcpy ((char *)fpp, &buf[6], sizeof (*ipp)); |
| 1108 | memcpy ((char *)spp, &buf[10], sizeof (*ipp)); |
| 1109 | return buf[0]; |
| 1110 | } |
| 1111 | |
| 1112 | /****************************************************************************** |
| 1113 | * ninStrGet: |
| 1114 | * Read a '\0'-terminated string of data out of the 960 memory space. |
| 1115 | * |
| 1116 | ******************************************************************************/ |
| 1117 | static |
| 1118 | ninStrGet( ninaddr, hostaddr ) |
| 1119 | unsigned long ninaddr; /* Address of string in NINDY memory space */ |
| 1120 | unsigned char *hostaddr; /* Address of the buffer to which string should |
| 1121 | * be copied. |
| 1122 | */ |
| 1123 | { |
| 1124 | unsigned char cmd[5]; |
| 1125 | |
| 1126 | cmd[0] = '"'; |
| 1127 | store_unsigned_integer (&cmd[1], 4, ninaddr); |
| 1128 | send( cmd, 5, hostaddr ); |
| 1129 | } |
| 1130 | |
| 1131 | #if 0 |
| 1132 | /* Not used. */ |
| 1133 | |
| 1134 | /****************************************************************************** |
| 1135 | * ninVersion: |
| 1136 | * Ask NINDY for version information about itself. |
| 1137 | * The information is sent as an ascii string in the form "x.xx,<arch>", |
| 1138 | * where, |
| 1139 | * x.xx is the version number |
| 1140 | * <arch> is the processor architecture: "KA", "KB", "MC", "CA" * |
| 1141 | * |
| 1142 | ******************************************************************************/ |
| 1143 | int |
| 1144 | ninVersion( p ) |
| 1145 | unsigned char *p; /* Where to place version string */ |
| 1146 | { |
| 1147 | |
| 1148 | if ( old_nindy ){ |
| 1149 | return OninVersion( p ); |
| 1150 | } |
| 1151 | send((unsigned char *) "v", 1, p ); |
| 1152 | return strlen(p); |
| 1153 | } |
| 1154 | #endif /* 0 */ |