gdb/remote-vx.c

   1 /* Memory-access and commands for remote VxWorks processes, for GDB.
   2    Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
   3    Contributed by Wind River Systems and Cygnus Support.
   4
   5 This file is part of GDB.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 #include "defs.h"
  22 #include "frame.h"
  23 #include "inferior.h"
  24 #include "wait.h"
  25 #include "target.h"
  26 #include "gdbcore.h"
  27 #include "command.h"
  28 #include "symtab.h"
  29 #include "complaints.h"
  30 #include "gdbcmd.h"
  31
  32 #include <string.h>
  33 #include <errno.h>
  34 #include <signal.h>
  35 #include <fcntl.h>
  36 #include <sys/types.h>
  37 #include <sys/socket.h>
  38 #define malloc bogon_malloc     /* Sun claims "char *malloc()" not void * */
  39 #define free bogon_free         /* Sun claims "int free()" not void */
  40 #define realloc bogon_realloc   /* Sun claims "char *realloc()", not void * */
  41 #include <rpc/rpc.h>
  42 #undef malloc
  43 #undef free
  44 #undef realloc
  45 #include <sys/time.h>           /* UTek's <rpc/rpc.h> doesn't #incl this */
  46 #include <netdb.h>
  47 #include "vx-share/ptrace.h"
  48 #include "vx-share/xdr_ptrace.h"
  49 #include "vx-share/xdr_ld.h"
  50 #include "vx-share/xdr_rdb.h"
  51 #include "vx-share/dbgRpcLib.h"
  52
  53 #include <symtab.h>
  54
  55 extern void symbol_file_command ();
  56 extern int stop_soon_quietly;           /* for wait_for_inferior */
  57
  58 static int net_ptrace_clnt_call ();     /* Forward decl */
  59 static enum clnt_stat net_clnt_call (); /* Forward decl */
  60 extern struct target_ops vx_ops, vx_run_ops;    /* Forward declaration */
  61
  62 /* Saved name of target host and called function for "info files".
  63    Both malloc'd.  */
  64
  65 static char *vx_host;
  66 static char *vx_running;                /* Called function */
  67
  68 /* Nonzero means target that is being debugged remotely has a floating
  69    point processor.  */
  70
  71 static int target_has_fp;
  72
  73 /* Default error message when the network is forking up.  */
  74
  75 static const char rpcerr[] = "network target debugging:  rpc error";
  76
  77 CLIENT *pClient;         /* client used in net debugging */
  78 static int ptraceSock = RPC_ANYSOCK;
  79
  80 enum clnt_stat net_clnt_call();
  81 static void parse_args ();
  82
  83 static struct timeval rpcTimeout = { 10, 0 };
  84
  85 static char *skip_white_space ();
  86 static char *find_white_space ();
  87
  88 /* Tell the VxWorks target system to download a file.
  89    The load addresses of the text, data, and bss segments are
  90    stored in *pTextAddr, *pDataAddr, and *pBssAddr (respectively).
  91    Returns 0 for success, -1 for failure.  */
  92
  93 static int
  94 net_load (filename, pTextAddr, pDataAddr, pBssAddr)
  95     char *filename;
  96     CORE_ADDR *pTextAddr;
  97     CORE_ADDR *pDataAddr;
  98     CORE_ADDR *pBssAddr;
  99     {
 100     enum clnt_stat status;
 101     struct ldfile ldstruct;
 102     struct timeval load_timeout;
 103
 104     bzero ((char *) &ldstruct, sizeof (ldstruct));
 105
 106     /* We invoke clnt_call () here directly, instead of through
 107        net_clnt_call (), because we need to set a large timeout value.
 108        The load on the target side can take quite a while, easily
 109        more than 10 seconds.  The user can kill this call by typing
 110        CTRL-C if there really is a problem with the load.
 111
 112        Do not change the tv_sec value without checking -- select() imposes
 113        a limit of 10**8 on it for no good reason that I can see...  */
 114
 115     load_timeout.tv_sec = 99999999;   /* A large number, effectively inf. */
 116     load_timeout.tv_usec = 0;
 117
 118     status = clnt_call (pClient, VX_LOAD, xdr_wrapstring, &filename, xdr_ldfile,
 119                         &ldstruct, load_timeout);
 120
 121     if (status == RPC_SUCCESS)
 122       {
 123         if (*ldstruct.name == 0)        /* load failed on VxWorks side */
 124           return -1;
 125         *pTextAddr = ldstruct.txt_addr;
 126         *pDataAddr = ldstruct.data_addr;
 127         *pBssAddr = ldstruct.bss_addr;
 128         return 0;
 129       }
 130     else
 131         return -1;
 132     }
 133
 134 /* returns 0 if successful, errno if RPC failed or VxWorks complains. */
 135
 136 static int
 137 net_break (addr, procnum)
 138     int addr;
 139     u_long procnum;
 140     {
 141     enum clnt_stat status;
 142     int break_status;
 143     Rptrace ptrace_in;  /* XXX This is stupid.  It doesn't need to be a ptrace
 144                            structure.  How about something smaller? */
 145
 146     bzero ((char *) &ptrace_in, sizeof (ptrace_in));
 147     break_status = 0;
 148
 149     ptrace_in.addr = addr;
 150     ptrace_in.pid = inferior_pid;
 151
 152     status = net_clnt_call (procnum, xdr_rptrace, &ptrace_in, xdr_int,
 153                             &break_status);
 154
 155     if (status != RPC_SUCCESS)
 156         return errno;
 157
 158     if (break_status == -1)
 159       return ENOMEM;
 160     return break_status;        /* probably (FIXME) zero */
 161     }
 162
 163 /* returns 0 if successful, errno otherwise */
 164
 165 static int
 166 vx_insert_breakpoint (addr)
 167     int addr;
 168     {
 169     return net_break (addr, VX_BREAK_ADD);
 170     }
 171
 172 /* returns 0 if successful, errno otherwise */
 173
 174 static int
 175 vx_remove_breakpoint (addr)
 176     int addr;
 177     {
 178     return net_break (addr, VX_BREAK_DELETE);
 179     }
 180
 181 /* Start an inferior process and sets inferior_pid to its pid.
 182    EXEC_FILE is the file to run.
 183    ALLARGS is a string containing the arguments to the program.
 184    ENV is the environment vector to pass.
 185    Returns process id.  Errors reported with error().
 186    On VxWorks, we ignore exec_file.  */
 187
 188 static void
 189 vx_create_inferior (exec_file, args, env)
 190      char *exec_file;
 191      char *args;
 192      char **env;
 193 {
 194   enum clnt_stat status;
 195   arg_array passArgs;
 196   TASK_START taskStart;
 197
 198   bzero ((char *) &passArgs, sizeof (passArgs));
 199   bzero ((char *) &taskStart, sizeof (taskStart));
 200
 201   /* parse arguments, put them in passArgs */
 202
 203   parse_args (args, &passArgs);
 204
 205   if (passArgs.arg_array_len == 0)
 206     error ("You must specify a function name to run, and arguments if any");
 207
 208   status = net_clnt_call (PROCESS_START, xdr_arg_array, &passArgs,
 209                           xdr_TASK_START, &taskStart);
 210
 211   if ((status != RPC_SUCCESS) || (taskStart.status == -1))
 212     error ("Can't create process on remote target machine");
 213
 214   /* Save the name of the running function */
 215   vx_running = savestring (passArgs.arg_array_val[0],
 216                            strlen (passArgs.arg_array_val[0]));
 217
 218 #ifdef CREATE_INFERIOR_HOOK
 219   CREATE_INFERIOR_HOOK (pid);
 220 #endif
 221
 222   push_target (&vx_run_ops);
 223   inferior_pid = taskStart.pid;
 224
 225   /* We will get a trace trap after one instruction.
 226      Insert breakpoints and continue.  */
 227
 228   init_wait_for_inferior ();
 229
 230   /* Set up the "saved terminal modes" of the inferior
 231      based on what modes we are starting it with.  */
 232   target_terminal_init ();
 233
 234   /* Install inferior's terminal modes.  */
 235   target_terminal_inferior ();
 236
 237   stop_soon_quietly = 1;
 238   wait_for_inferior ();         /* Get the task spawn event */
 239   stop_soon_quietly = 0;
 240
 241   /* insert_step_breakpoint ();  FIXME, do we need this?  */
 242   proceed(-1, -1, 0);
 243 }
 244
 245 /* Fill ARGSTRUCT in argc/argv form with the arguments from the
 246    argument string ARGSTRING.  */
 247
 248 static void
 249 parse_args (arg_string, arg_struct)
 250      register char *arg_string;
 251      arg_array *arg_struct;
 252 {
 253   register int arg_count = 0;   /* number of arguments */
 254   register int arg_index = 0;
 255   register char *p0;
 256
 257   bzero ((char *) arg_struct, sizeof (arg_array));
 258
 259   /* first count how many arguments there are */
 260
 261   p0 = arg_string;
 262   while (*p0 != '\0')
 263     {
 264       if (*(p0 = skip_white_space (p0)) == '\0')
 265         break;
 266       p0 = find_white_space (p0);
 267       arg_count++;
 268     }
 269
 270   arg_struct->arg_array_len = arg_count;
 271   arg_struct->arg_array_val = (char **) xmalloc ((arg_count + 1)
 272                                                  * sizeof (char *));
 273
 274   /* now copy argument strings into arg_struct.  */
 275
 276   while (*(arg_string = skip_white_space (arg_string)))
 277     {
 278       p0 = find_white_space (arg_string);
 279       arg_struct->arg_array_val[arg_index++] = savestring (arg_string,
 280                                                            p0 - arg_string);
 281       arg_string = p0;
 282     }
 283
 284   arg_struct->arg_array_val[arg_count] = NULL;
 285 }
 286
 287 /* Advance a string pointer across whitespace and return a pointer
 288    to the first non-white character.  */
 289
 290 static char *
 291 skip_white_space (p)
 292      register char *p;
 293 {
 294   while (*p == ' ' || *p == '\t')
 295     p++;
 296   return p;
 297 }
 298
 299 /* Search for the first unquoted whitespace character in a string.
 300    Returns a pointer to the character, or to the null terminator
 301    if no whitespace is found.  */
 302
 303 static char *
 304 find_white_space (p)
 305      register char *p;
 306 {
 307   register int c;
 308
 309   while ((c = *p) != ' ' && c != '\t' && c)
 310     {
 311       if (c == '\'' || c == '"')
 312         {
 313           while (*++p != c && *p)
 314             {
 315               if (*p == '\\')
 316                 p++;
 317             }
 318           if (!*p)
 319             break;
 320         }
 321       p++;
 322     }
 323   return p;
 324 }
 325
 326 /* Poll the VxWorks target system for an event related
 327    to the debugged task.
 328    Returns -1 if remote wait failed, task status otherwise.  */
 329
 330 static int
 331 net_wait (pEvent)
 332     RDB_EVENT *pEvent;
 333 {
 334     int pid;
 335     enum clnt_stat status;
 336
 337     bzero ((char *) pEvent, sizeof (RDB_EVENT));
 338
 339     pid = inferior_pid;
 340     status = net_clnt_call (PROCESS_WAIT, xdr_int, &pid, xdr_RDB_EVENT, pEvent);
 341
 342     return (status == RPC_SUCCESS)? pEvent->status: -1;
 343 }
 344
 345 /* Suspend the remote task.
 346    Returns -1 if suspend fails on target system, 0 otherwise.  */
 347
 348 static int
 349 net_quit ()
 350 {
 351     int pid;
 352     int quit_status;
 353     enum clnt_stat status;
 354
 355     quit_status = 0;
 356
 357     /* don't let rdbTask suspend itself by passing a pid of 0 */
 358
 359     if ((pid = inferior_pid) == 0)
 360         return -1;
 361
 362     status = net_clnt_call (VX_TASK_SUSPEND, xdr_int, &pid, xdr_int,
 363                             &quit_status);
 364
 365     return (status == RPC_SUCCESS)? quit_status: -1;
 366 }
 367
 368 /* Read a register or registers from the remote system.  */
 369
 370 static void
 371 vx_read_register (regno)
 372      int regno;
 373 {
 374   int status;
 375   Rptrace ptrace_in;
 376   Ptrace_return ptrace_out;
 377   C_bytes in_data;
 378   C_bytes out_data;
 379   extern char registers[];
 380
 381   bzero ((char *) &ptrace_in, sizeof (ptrace_in));
 382   bzero ((char *) &ptrace_out, sizeof (ptrace_out));
 383
 384   /* FIXME, eventually only get the ones we need.  */
 385   registers_fetched ();
 386
 387   ptrace_in.pid = inferior_pid;
 388   ptrace_out.info.more_data = (caddr_t) &out_data;
 389   out_data.len   = VX_NUM_REGS * REGISTER_RAW_SIZE (0);
 390   out_data.bytes = (caddr_t) registers;
 391
 392   status = net_ptrace_clnt_call (PTRACE_GETREGS, &ptrace_in, &ptrace_out);
 393   if (status)
 394     error (rpcerr);
 395   if (ptrace_out.status == -1)
 396     {
 397       errno = ptrace_out.errno;
 398       perror_with_name ("net_ptrace_clnt_call(PTRACE_GETREGS)");
 399     }
 400
 401 #ifdef VX_SIZE_FPREGS
 402     /* If the target has floating point registers, fetch them.
 403        Otherwise, zero the floating point register values in
 404        registers[] for good measure, even though we might not
 405        need to.  */
 406
 407   if (target_has_fp)
 408     {
 409       ptrace_in.pid = inferior_pid;
 410       ptrace_out.info.more_data = (caddr_t) &out_data;
 411       out_data.len   =  VX_SIZE_FPREGS;
 412       out_data.bytes = (caddr_t) &registers[REGISTER_BYTE (FP0_REGNUM)];
 413
 414       status = net_ptrace_clnt_call (PTRACE_GETFPREGS, &ptrace_in, &ptrace_out);
 415       if (status)
 416         error (rpcerr);
 417       if (ptrace_out.status == -1)
 418         {
 419           errno = ptrace_out.errno;
 420           perror_with_name ("net_ptrace_clnt_call(PTRACE_GETFPREGS)");
 421         }
 422     }
 423   else
 424     {
 425       bzero (&registers[REGISTER_BYTE (FP0_REGNUM)], VX_SIZE_FPREGS);
 426     }
 427 #endif /* VX_SIZE_FPREGS */
 428 }
 429
 430 /* Prepare to store registers.  Since we will store all of them,
 431    read out their current values now.  */
 432
 433 static void
 434 vx_prepare_to_store ()
 435 {
 436   /* Fetch all registers, if any of them are not yet fetched.  */
 437   read_register_bytes (0, NULL, REGISTER_BYTES);
 438 }
 439
 440
 441 /* Store our register values back into the inferior.
 442    If REGNO is -1, do this for all registers.
 443    Otherwise, REGNO specifies which register (so we can save time).  */
 444    /* FIXME, look at REGNO to save time here */
 445
 446 static void
 447 vx_write_register (regno)
 448      int regno;
 449 {
 450   C_bytes in_data;
 451   C_bytes out_data;
 452   extern char registers[];
 453   int status;
 454   Rptrace ptrace_in;
 455   Ptrace_return ptrace_out;
 456
 457   bzero ((char *) &ptrace_in, sizeof (ptrace_in));
 458   bzero ((char *) &ptrace_out, sizeof (ptrace_out));
 459
 460   ptrace_in.pid = inferior_pid;
 461   ptrace_in.info.ttype     = DATA;
 462   ptrace_in.info.more_data = (caddr_t) &in_data;
 463
 464   in_data.bytes = registers;
 465
 466   in_data.len = VX_NUM_REGS * sizeof (REGISTER_TYPE);
 467
 468   /* XXX change second param to be a proc number */
 469   status = net_ptrace_clnt_call (PTRACE_SETREGS, &ptrace_in, &ptrace_out);
 470   if (status)
 471       error (rpcerr);
 472   if (ptrace_out.status == -1)
 473     {
 474       errno = ptrace_out.errno;
 475       perror_with_name ("net_ptrace_clnt_call(PTRACE_SETREGS)");
 476     }
 477
 478 #ifdef VX_SIZE_FPREGS
 479   /* Store floating point registers if the target has them.  */
 480
 481   if (target_has_fp)
 482     {
 483       ptrace_in.pid = inferior_pid;
 484       ptrace_in.info.ttype     = DATA;
 485       ptrace_in.info.more_data = (caddr_t) &in_data;
 486
 487
 488       in_data.bytes = &registers[REGISTER_BYTE (FP0_REGNUM)];
 489       in_data.len = VX_SIZE_FPREGS;
 490
 491       status = net_ptrace_clnt_call (PTRACE_SETFPREGS, &ptrace_in, &ptrace_out);
 492       if (status)
 493           error (rpcerr);
 494       if (ptrace_out.status == -1)
 495         {
 496           errno = ptrace_out.errno;
 497           perror_with_name ("net_ptrace_clnt_call(PTRACE_SETFPREGS)");
 498         }
 499     }
 500 #endif  /* VX_SIZE_FPREGS */
 501 }
 502
 503 /* Copy LEN bytes to or from remote inferior's memory starting at MEMADDR
 504    to debugger memory starting at MYADDR.  WRITE is true if writing to the
 505    inferior.
 506    Result is the number of bytes written or read (zero if error).  The
 507    protocol allows us to return a negative count, indicating that we can't
 508    handle the current address but can handle one N bytes further, but
 509    vxworks doesn't give us that information.  */
 510
 511 static int
 512 vx_xfer_memory (memaddr, myaddr, len, write, target)
 513      CORE_ADDR memaddr;
 514      char *myaddr;
 515      int len;
 516      int write;
 517      struct target_ops *target;                 /* ignored */
 518 {
 519   int status;
 520   Rptrace ptrace_in;
 521   Ptrace_return ptrace_out;
 522   C_bytes data;
 523
 524   bzero ((char *) &ptrace_in, sizeof (ptrace_in));
 525   bzero ((char *) &ptrace_out, sizeof (ptrace_out));
 526
 527   ptrace_in.pid = inferior_pid;         /* XXX pid unnecessary for READDATA */
 528   ptrace_in.addr = (int) memaddr;       /* Where from */
 529   ptrace_in.data = len;                 /* How many bytes */
 530
 531   if (write)
 532     {
 533       ptrace_in.info.ttype     = DATA;
 534       ptrace_in.info.more_data = (caddr_t) &data;
 535
 536       data.bytes = (caddr_t) myaddr;    /* Where from */
 537       data.len   = len;                 /* How many bytes (again, for XDR) */
 538
 539       /* XXX change second param to be a proc number */
 540       status = net_ptrace_clnt_call (PTRACE_WRITEDATA, &ptrace_in, &ptrace_out);
 541     }
 542   else
 543     {
 544       ptrace_out.info.more_data = (caddr_t) &data;
 545       data.bytes = myaddr;              /* Where to */
 546       data.len   = len;                 /* How many (again, for XDR) */
 547
 548       /* XXX change second param to be a proc number */
 549       status = net_ptrace_clnt_call (PTRACE_READDATA, &ptrace_in, &ptrace_out);
 550     }
 551
 552   if (status)
 553       error (rpcerr);
 554   if (ptrace_out.status == -1)
 555     {
 556       return 0;         /* No bytes moved */
 557     }
 558   return len;           /* Moved *all* the bytes */
 559 }
 560
 561 static void
 562 vx_files_info ()
 563 {
 564   printf ("\tAttached to host `%s'", vx_host);
 565   printf (", which has %sfloating point", target_has_fp? "": "no ");
 566   printf (".\n");
 567 }
 568
 569 static void
 570 vx_run_files_info ()
 571 {
 572   printf ("\tRunning %s VxWorks process %s",
 573           vx_running? "child": "attached",
 574           local_hex_string(inferior_pid));
 575   if (vx_running)
 576     printf (", function `%s'", vx_running);
 577   printf(".\n");
 578 }
 579
 580 static void
 581 vx_resume (step, siggnal)
 582      int step;
 583      int siggnal;
 584 {
 585   int status;
 586   Rptrace ptrace_in;
 587   Ptrace_return ptrace_out;
 588
 589   if (siggnal != 0 && siggnal != stop_signal)
 590     error ("Cannot send signals to VxWorks processes");
 591
 592   bzero ((char *) &ptrace_in, sizeof (ptrace_in));
 593   bzero ((char *) &ptrace_out, sizeof (ptrace_out));
 594
 595   ptrace_in.pid = inferior_pid;
 596   ptrace_in.addr = 1;   /* Target side insists on this, or it panics.  */
 597
 598   /* XXX change second param to be a proc number */
 599   status = net_ptrace_clnt_call (step? PTRACE_SINGLESTEP: PTRACE_CONT,
 600                                  &ptrace_in, &ptrace_out);
 601   if (status)
 602       error (rpcerr);
 603   if (ptrace_out.status == -1)
 604     {
 605       errno = ptrace_out.errno;
 606       perror_with_name ("Resuming remote process");
 607     }
 608 }
 609
 610 static void
 611 vx_mourn_inferior ()
 612 {
 613   pop_target ();                /* Pop back to no-child state */
 614   generic_mourn_inferior ();
 615 }
 616
 617 \f
 618 /* This function allows the addition of incrementally linked object files.  */
 619
 620 static void
 621 vx_load_command (arg_string, from_tty)
 622      char* arg_string;
 623      int from_tty;
 624 {
 625   CORE_ADDR text_addr;
 626   CORE_ADDR data_addr;
 627   CORE_ADDR bss_addr;
 628
 629   if (arg_string == 0)
 630     error ("The load command takes a file name");
 631
 632   arg_string = tilde_expand (arg_string);
 633   make_cleanup (free, arg_string);
 634
 635   dont_repeat ();
 636
 637   QUIT;
 638   immediate_quit++;
 639   if (net_load (arg_string, &text_addr, &data_addr, &bss_addr) == -1)
 640     error ("Load failed on target machine");
 641   immediate_quit--;
 642
 643   /* FIXME, for now we ignore data_addr and bss_addr.  */
 644   symbol_file_add (arg_string, from_tty, text_addr, 0, 0, 0);
 645 }
 646
 647 #ifdef FIXME  /* Not ready for prime time */
 648 /* Single step the target program at the source or machine level.
 649    Takes an error exit if rpc fails.
 650    Returns -1 if remote single-step operation fails, else 0.  */
 651
 652 static int
 653 net_step ()
 654 {
 655   enum clnt_stat status;
 656   int step_status;
 657   SOURCE_STEP source_step;
 658
 659   source_step.taskId = inferior_pid;
 660
 661   if (step_range_end)
 662     {
 663       source_step.startAddr = step_range_start;
 664       source_step.endAddr = step_range_end;
 665     }
 666   else
 667     {
 668       source_step.startAddr = 0;
 669       source_step.endAddr = 0;
 670     }
 671
 672   status = net_clnt_call (VX_SOURCE_STEP, xdr_SOURCE_STEP, &source_step,
 673                           xdr_int, &step_status);
 674
 675   if (status == RPC_SUCCESS)
 676     return step_status;
 677   else
 678     error (rpcerr);
 679 }
 680 #endif
 681
 682 /* Emulate ptrace using RPC calls to the VxWorks target system.
 683    Returns nonzero (-1) if RPC status to VxWorks is bad, 0 otherwise.  */
 684
 685 static int
 686 net_ptrace_clnt_call (request, pPtraceIn, pPtraceOut)
 687     enum ptracereq request;
 688     Rptrace *pPtraceIn;
 689     Ptrace_return *pPtraceOut;
 690 {
 691   enum clnt_stat status;
 692
 693   status = net_clnt_call (request, xdr_rptrace, pPtraceIn, xdr_ptrace_return,
 694                           pPtraceOut);
 695
 696   if (status != RPC_SUCCESS)
 697       return -1;
 698
 699   return 0;
 700 }
 701
 702 /* Query the target for the name of the file from which VxWorks was
 703    booted.  pBootFile is the address of a pointer to the buffer to
 704    receive the file name; if the pointer pointed to by pBootFile is
 705    NULL, memory for the buffer will be allocated by XDR.
 706    Returns -1 if rpc failed, 0 otherwise.  */
 707
 708 static int
 709 net_get_boot_file (pBootFile)
 710      char **pBootFile;
 711 {
 712   enum clnt_stat status;
 713
 714   status = net_clnt_call (VX_BOOT_FILE_INQ, xdr_void, (char *) 0,
 715                           xdr_wrapstring, pBootFile);
 716   return (status == RPC_SUCCESS) ? 0 : -1;
 717 }
 718
 719 /* Fetch a list of loaded object modules from the VxWorks target.
 720    Returns -1 if rpc failed, 0 otherwise
 721    There's no way to check if the returned loadTable is correct.
 722    VxWorks doesn't check it.  */
 723
 724 static int
 725 net_get_symbols (pLoadTable)
 726      ldtabl *pLoadTable;                /* return pointer to ldtabl here */
 727 {
 728   enum clnt_stat status;
 729
 730   bzero ((char *) pLoadTable, sizeof (struct ldtabl));
 731
 732   status = net_clnt_call (VX_STATE_INQ, xdr_void, 0, xdr_ldtabl, pLoadTable);
 733   return (status == RPC_SUCCESS) ? 0 : -1;
 734 }
 735
 736 /* Look up a symbol in the VxWorks target's symbol table.
 737    Returns status of symbol read on target side (0=success, -1=fail)
 738    Returns -1 and complain()s if rpc fails.  */
 739
 740 struct complaint cant_contact_target =
 741   {"Lost contact with VxWorks target", 0, 0};
 742
 743 static int
 744 vx_lookup_symbol (name, pAddr)
 745      char *name;                /* symbol name */
 746      CORE_ADDR *pAddr;
 747 {
 748   enum clnt_stat status;
 749   SYMBOL_ADDR symbolAddr;
 750
 751   *pAddr = 0;
 752   bzero ((char *) &symbolAddr, sizeof (symbolAddr));
 753
 754   status = net_clnt_call (VX_SYMBOL_INQ, xdr_wrapstring, &name,
 755                           xdr_SYMBOL_ADDR, &symbolAddr);
 756   if (status != RPC_SUCCESS) {
 757       complain (&cant_contact_target);
 758       return -1;
 759   }
 760
 761   *pAddr = symbolAddr.addr;
 762   return symbolAddr.status;
 763 }
 764
 765 /* Check to see if the VxWorks target has a floating point coprocessor.
 766    Returns 1 if target has floating point processor, 0 otherwise.
 767    Calls error() if rpc fails.  */
 768
 769 static int
 770 net_check_for_fp ()
 771 {
 772   enum clnt_stat status;
 773   bool_t fp = 0;        /* true if fp processor is present on target board */
 774
 775   status = net_clnt_call (VX_FP_INQUIRE, xdr_void, 0, xdr_bool, &fp);
 776   if (status != RPC_SUCCESS)
 777       error (rpcerr);
 778
 779    return (int) fp;
 780 }
 781
 782 /* Establish an RPC connection with the VxWorks target system.
 783    Calls error () if unable to establish connection.  */
 784
 785 static void
 786 net_connect (host)
 787      char *host;
 788 {
 789   struct sockaddr_in destAddr;
 790   struct hostent *destHost;
 791   unsigned long addr;
 792
 793   /* Get the internet address for the given host.  Allow a numeric
 794      IP address or a hostname.  */
 795
 796   addr = inet_addr (host);
 797   if (addr == -1)
 798     {
 799       destHost = (struct hostent *) gethostbyname (host);
 800       if (destHost == NULL)
 801         error ("Invalid hostname.  Couldn't find remote host address.");
 802       addr = * (unsigned long *) destHost->h_addr;
 803     }
 804
 805   bzero (&destAddr, sizeof (destAddr));
 806
 807   destAddr.sin_addr.s_addr = addr;
 808   destAddr.sin_family      = AF_INET;
 809   destAddr.sin_port        = 0; /* set to actual port that remote
 810                                    ptrace is listening on.  */
 811
 812   /* Create a tcp client transport on which to issue
 813      calls to the remote ptrace server.  */
 814
 815   ptraceSock = RPC_ANYSOCK;
 816   pClient = clnttcp_create (&destAddr, RDBPROG, RDBVERS, &ptraceSock, 0, 0);
 817   /* FIXME, here is where we deal with different version numbers of the proto */
 818
 819   if (pClient == NULL)
 820     {
 821       clnt_pcreateerror ("\tnet_connect");
 822       error ("Couldn't connect to remote target.");
 823     }
 824 }
 825 \f
 826 /* Sleep for the specified number of milliseconds
 827  * (assumed to be less than 1000).
 828  * If select () is interrupted, returns immediately;
 829  * takes an error exit if select () fails for some other reason.
 830  */
 831
 832 static void
 833 sleep_ms (ms)
 834      long ms;
 835 {
 836   struct timeval select_timeout;
 837   int status;
 838
 839   select_timeout.tv_sec = 0;
 840   select_timeout.tv_usec = ms * 1000;
 841
 842   status = select (0, (fd_set *) 0, (fd_set *) 0, (fd_set *) 0, &select_timeout);
 843
 844   if (status < 0 && errno != EINTR)
 845     perror_with_name ("select");
 846 }
 847
 848 /* Wait for control to return from inferior to debugger.
 849    If inferior gets a signal, we may decide to start it up again
 850    instead of returning.  That is why there is a loop in this function.
 851    When this function actually returns it means the inferior
 852    should be left stopped and GDB should read more commands.  */
 853
 854 /* For network debugging with VxWorks.
 855  * VxWorks knows when tasks hit breakpoints, receive signals, exit, etc,
 856  * so vx_wait() receives this information directly from
 857  * VxWorks instead of trying to figure out what happenned via a wait() call.
 858  */
 859
 860 static int
 861 vx_wait (status)
 862      int *status;
 863 {
 864   register int pid;
 865   WAITTYPE w;
 866   RDB_EVENT rdbEvent;
 867   int quit_failed;
 868
 869   do
 870     {
 871       /* If CTRL-C is hit during this loop,
 872          suspend the inferior process.  */
 873
 874       quit_failed = 0;
 875       if (quit_flag)
 876         {
 877           quit_failed = (net_quit () == -1);
 878           quit_flag = 0;
 879         }
 880
 881       /* If a net_quit () or net_wait () call has failed,
 882          allow the user to break the connection with the target.
 883          We can't simply error () out of this loop, since the
 884          data structures representing the state of the inferior
 885          are in an inconsistent state.  */
 886
 887       if (quit_failed || net_wait (&rdbEvent) == -1)
 888         {
 889           terminal_ours ();
 890           if (query ("Can't %s.  Disconnect from target system? ",
 891                      (quit_failed) ? "suspend remote task"
 892                                    : "get status of remote task"))
 893             {
 894               target_mourn_inferior();
 895               error ("Use the \"target\" command to reconnect.");
 896             }
 897           else
 898             {
 899               terminal_inferior ();
 900               continue;
 901             }
 902         }
 903
 904       pid = rdbEvent.taskId;
 905       if (pid == 0)
 906         {
 907           sleep_ms (200);       /* FIXME Don't kill the network too badly */
 908         }
 909       else if (pid != inferior_pid)
 910         fatal ("Bad pid for debugged task: %s\n", local_hex_string(pid));
 911     } while (pid == 0);
 912
 913   /* FIXME, eventually do more then SIGTRAP on everything...  */
 914   switch (rdbEvent.eventType)
 915     {
 916     case EVENT_EXIT:
 917       WSETEXIT (w, 0);
 918       /* FIXME is it possible to distinguish between a
 919          XXX   normal vs abnormal exit in VxWorks? */
 920       break;
 921
 922     case EVENT_START:           /* Task was just started. */
 923       WSETSTOP (w, SIGTRAP);
 924       break;
 925
 926     case EVENT_STOP:
 927       WSETSTOP (w, SIGTRAP);
 928       /* XXX was it stopped by a signal?  act accordingly */
 929       break;
 930
 931     case EVENT_BREAK:           /* Breakpoint was hit. */
 932       WSETSTOP (w, SIGTRAP);
 933       break;
 934
 935     case EVENT_SUSPEND:         /* Task was suspended, probably by ^C. */
 936       WSETSTOP (w, SIGINT);
 937       break;
 938
 939     case EVENT_BUS_ERR:         /* Task made evil nasty reference. */
 940       WSETSTOP (w, SIGBUS);
 941       break;
 942
 943     case EVENT_ZERO_DIV:        /* Division by zero */
 944       WSETSTOP (w, SIGFPE);     /* Like Unix, call it a float exception. */
 945       break;
 946
 947     case EVENT_SIGNAL:
 948       /* The target is not running Unix, and its
 949          faults/traces do not map nicely into Unix signals.
 950          Make sure they do not get confused with Unix signals
 951          by numbering them with values higher than the highest
 952          legal Unix signal.  code in the arch-dependent PRINT_RANDOM_SIGNAL
 953          routine will interpret the value for wait_for_inferior.  */
 954       WSETSTOP (w, rdbEvent.sigType + NSIG);
 955       break;
 956     } /* switch */
 957   *status = *(int *)&w;         /* Grumble union wait crap Grumble */
 958   return pid;
 959 }
 960 \f
 961 static int
 962 symbol_stub (arg)
 963      char *arg;
 964 {
 965   symbol_file_command (arg, 0);
 966   return 1;
 967 }
 968
 969 static int
 970 add_symbol_stub (arg)
 971      char *arg;
 972 {
 973   struct ldfile *pLoadFile = (struct ldfile *)arg;
 974
 975   printf("\t%s: ", pLoadFile->name);
 976   symbol_file_add (pLoadFile->name, 0, pLoadFile->txt_addr, 0, 0, 0);
 977   printf ("ok\n");
 978   return 1;
 979 }
 980 /* Target command for VxWorks target systems.
 981
 982    Used in vxgdb.  Takes the name of a remote target machine
 983    running vxWorks and connects to it to initialize remote network
 984    debugging.  */
 985
 986 static void
 987 vx_open (args, from_tty)
 988      char *args;
 989      int from_tty;
 990 {
 991   extern int close ();
 992   char *bootFile;
 993   extern char *source_path;
 994   struct ldtabl loadTable;
 995   struct ldfile *pLoadFile;
 996   int i;
 997   extern CLIENT *pClient;
 998
 999   if (!args)
1000     error_no_arg ("target machine name");
1001
1002   target_preopen (from_tty);
1003
1004   unpush_target (&vx_ops);
1005   printf ("Attaching remote machine across net...\n");
1006   fflush (stdout);
1007
1008   /* Allow the user to kill the connect attempt by typing ^C.
1009      Wait until the call to target_has_fp () completes before
1010      disallowing an immediate quit, since even if net_connect ()
1011      is successful, the remote debug server might be hung.  */
1012
1013   immediate_quit++;
1014
1015   net_connect (args);
1016   target_has_fp = net_check_for_fp ();
1017   printf_filtered ("Connected to %s.\n", args);
1018
1019   immediate_quit--;
1020
1021   push_target (&vx_ops);
1022
1023   /* Save a copy of the target host's name.  */
1024   vx_host = savestring (args, strlen (args));
1025
1026   /* Find out the name of the file from which the target was booted
1027      and load its symbol table.  */
1028
1029   printf_filtered ("Looking in Unix path for all loaded modules:\n");
1030   bootFile = NULL;
1031   if (!net_get_boot_file (&bootFile))
1032     {
1033       if (*bootFile) {
1034         printf_filtered ("\t%s: ", bootFile);
1035         if (catch_errors
1036             (symbol_stub, bootFile,
1037              "Error while reading symbols from boot file:\n", RETURN_MASK_ALL))
1038           puts_filtered ("ok\n");
1039       } else if (from_tty)
1040         printf ("VxWorks kernel symbols not loaded.\n");
1041     }
1042   else
1043     error ("Can't retrieve boot file name from target machine.");
1044
1045   clnt_freeres (pClient, xdr_wrapstring, &bootFile);
1046
1047   if (net_get_symbols (&loadTable) != 0)
1048     error ("Can't read loaded modules from target machine");
1049
1050   i = 0-1;
1051   while (++i < loadTable.tbl_size)
1052     {
1053       QUIT;     /* FIXME, avoids clnt_freeres below:  mem leak */
1054       pLoadFile = &loadTable.tbl_ent [i];
1055 #ifdef WRS_ORIG
1056   {
1057     register int desc;
1058     struct cleanup *old_chain;
1059     char *fullname = NULL;
1060
1061     desc = openp (source_path, 0, pLoadFile->name, O_RDONLY, 0, &fullname);
1062     if (desc < 0)
1063         perror_with_name (pLoadFile->name);
1064     old_chain = make_cleanup (close, desc);
1065     add_file_at_addr (fullname, desc, pLoadFile->txt_addr, pLoadFile->data_addr,
1066                       pLoadFile->bss_addr);
1067     do_cleanups (old_chain);
1068   }
1069 #else
1070       /* Botches, FIXME:
1071          (1)  Searches the PATH, not the source path.
1072          (2)  data and bss are assumed to be at the usual offsets from text.  */
1073       catch_errors (add_symbol_stub, (char *)pLoadFile, (char *)0,
1074                     RETURN_MASK_ALL);
1075 #endif
1076     }
1077   printf_filtered ("Done.\n");
1078
1079   clnt_freeres (pClient, xdr_ldtabl, &loadTable);
1080 }
1081 \f
1082 /* Takes a task started up outside of gdb and ``attaches'' to it.
1083    This stops it cold in its tracks and allows us to start tracing it.  */
1084
1085 static void
1086 vx_attach (args, from_tty)
1087      char *args;
1088      int from_tty;
1089 {
1090   int pid;
1091   char *cptr = 0;
1092   Rptrace ptrace_in;
1093   Ptrace_return ptrace_out;
1094   int status;
1095
1096   if (!args)
1097     error_no_arg ("process-id to attach");
1098
1099   pid = strtol (args, &cptr, 0);
1100   if ((cptr == args) || (*cptr != '\0'))
1101     error ("Invalid process-id -- give a single number in decimal or 0xhex");
1102
1103   if (from_tty)
1104       printf ("Attaching pid %s.\n", local_hex_string(pid));
1105
1106   bzero ((char *)&ptrace_in,  sizeof (ptrace_in));
1107   bzero ((char *)&ptrace_out, sizeof (ptrace_out));
1108   ptrace_in.pid = pid;
1109
1110   status = net_ptrace_clnt_call (PTRACE_ATTACH, &ptrace_in, &ptrace_out);
1111   if (status == -1)
1112     error (rpcerr);
1113   if (ptrace_out.status == -1)
1114     {
1115       errno = ptrace_out.errno;
1116       perror_with_name ("Attaching remote process");
1117     }
1118
1119   /* It worked... */
1120   push_target (&vx_run_ops);
1121   inferior_pid = pid;
1122   vx_running = 0;
1123 }
1124
1125
1126 /* detach_command --
1127    takes a program previously attached to and detaches it.
1128    The program resumes execution and will no longer stop
1129    on signals, etc.  We better not have left any breakpoints
1130    in the program or it'll die when it hits one.  For this
1131    to work, it may be necessary for the process to have been
1132    previously attached.  It *might* work if the program was
1133    started via the normal ptrace (PTRACE_TRACEME).  */
1134
1135 static void
1136 vx_detach (args, from_tty)
1137      char *args;
1138      int from_tty;
1139 {
1140   Rptrace ptrace_in;
1141   Ptrace_return ptrace_out;
1142   int signal = 0;
1143   int status;
1144
1145   if (args)
1146     error ("Argument given to VxWorks \"detach\".");
1147
1148   if (from_tty)
1149       printf ("Detaching pid %s.\n", local_hex_string(inferior_pid));
1150
1151   if (args)             /* FIXME, should be possible to leave suspended */
1152     signal = atoi (args);
1153
1154   bzero ((char *)&ptrace_in,  sizeof (ptrace_in));
1155   bzero ((char *)&ptrace_out, sizeof (ptrace_out));
1156   ptrace_in.pid = inferior_pid;
1157
1158   status = net_ptrace_clnt_call (PTRACE_DETACH, &ptrace_in, &ptrace_out);
1159   if (status == -1)
1160     error (rpcerr);
1161   if (ptrace_out.status == -1)
1162     {
1163       errno = ptrace_out.errno;
1164       perror_with_name ("Detaching VxWorks process");
1165     }
1166
1167   inferior_pid = 0;
1168   pop_target ();        /* go back to non-executing VxWorks connection */
1169 }
1170
1171 /* vx_kill -- takes a running task and wipes it out.  */
1172
1173 static void
1174 vx_kill ()
1175 {
1176   Rptrace ptrace_in;
1177   Ptrace_return ptrace_out;
1178   int status;
1179
1180   printf ("Killing pid %s.\n", local_hex_string(inferior_pid));
1181
1182   bzero ((char *)&ptrace_in,  sizeof (ptrace_in));
1183   bzero ((char *)&ptrace_out, sizeof (ptrace_out));
1184   ptrace_in.pid = inferior_pid;
1185
1186   status = net_ptrace_clnt_call (PTRACE_KILL, &ptrace_in, &ptrace_out);
1187   if (status == -1)
1188     warning (rpcerr);
1189   else if (ptrace_out.status == -1)
1190     {
1191       errno = ptrace_out.errno;
1192       perror_with_name ("Killing VxWorks process");
1193     }
1194
1195   /* If it gives good status, the process is *gone*, no events remain.
1196      If the kill failed, assume the process is gone anyhow.  */
1197   inferior_pid = 0;
1198   pop_target ();        /* go back to non-executing VxWorks connection */
1199 }
1200
1201 /* Clean up from the VxWorks process target as it goes away.  */
1202
1203 static void
1204 vx_proc_close (quitting)
1205      int quitting;
1206 {
1207   inferior_pid = 0;             /* No longer have a process.  */
1208   if (vx_running)
1209     free (vx_running);
1210   vx_running = 0;
1211 }
1212 \f
1213 /* Make an RPC call to the VxWorks target.
1214    Returns RPC status.  */
1215
1216 static enum clnt_stat
1217 net_clnt_call (procNum, inProc, in, outProc, out)
1218     enum ptracereq procNum;
1219     xdrproc_t inProc;
1220     char *in;
1221     xdrproc_t outProc;
1222     char *out;
1223 {
1224   enum clnt_stat status;
1225
1226   status = clnt_call (pClient, procNum, inProc, in, outProc, out, rpcTimeout);
1227
1228   if (status != RPC_SUCCESS)
1229       clnt_perrno (status);
1230
1231   return status;
1232 }
1233
1234 /* Clean up before losing control.  */
1235
1236 static void
1237 vx_close (quitting)
1238      int quitting;
1239 {
1240   if (pClient)
1241     clnt_destroy (pClient);     /* The net connection */
1242   pClient = 0;
1243
1244   if (vx_host)
1245     free (vx_host);             /* The hostname */
1246   vx_host = 0;
1247 }
1248
1249 /* A vxprocess target should be started via "run" not "target".  */
1250 /*ARGSUSED*/
1251 static void
1252 vx_proc_open (name, from_tty)
1253      char *name;
1254      int from_tty;
1255 {
1256   error ("Use the \"run\" command to start a VxWorks process.");
1257 }
1258
1259 /* Target ops structure for accessing memory and such over the net */
1260
1261 struct target_ops vx_ops = {
1262         "vxworks", "VxWorks target memory via RPC over TCP/IP",
1263         "Use VxWorks target memory.  \n\
1264 Specify the name of the machine to connect to.",
1265         vx_open, vx_close, vx_attach, 0, /* vx_detach, */
1266         0, 0, /* resume, wait */
1267         0, 0, /* read_reg, write_reg */
1268         0, /* prep_to_store, */
1269         vx_xfer_memory, vx_files_info,
1270         0, 0, /* insert_breakpoint, remove_breakpoint */
1271         0, 0, 0, 0, 0,  /* terminal stuff */
1272         0, /* vx_kill, */
1273         vx_load_command,
1274         vx_lookup_symbol,
1275         vx_create_inferior, 0,  /* mourn_inferior */
1276         0, /* can_run */
1277         0, /* notice_signals */
1278         core_stratum, 0, /* next */
1279         1, 1, 0, 0, 0,  /* all mem, mem, stack, regs, exec */
1280         0, 0,                   /* Section pointers */
1281         OPS_MAGIC,              /* Always the last thing */
1282 };
1283
1284 /* Target ops structure for accessing VxWorks child processes over the net */
1285
1286 struct target_ops vx_run_ops = {
1287         "vxprocess", "VxWorks process",
1288         "VxWorks process, started by the \"run\" command.",
1289         vx_proc_open, vx_proc_close, 0, vx_detach, /* vx_attach */
1290         vx_resume, vx_wait,
1291         vx_read_register, vx_write_register,
1292         vx_prepare_to_store,
1293         vx_xfer_memory, vx_run_files_info,
1294         vx_insert_breakpoint, vx_remove_breakpoint,
1295         0, 0, 0, 0, 0,  /* terminal stuff */
1296         vx_kill,
1297         vx_load_command,
1298         vx_lookup_symbol,
1299         0, vx_mourn_inferior,
1300         0,  /* can_run */
1301         0, /* notice_signals */
1302         process_stratum, 0, /* next */
1303         0, 1, 1, 1, 1,  /* all mem, mem, stack, regs, exec */
1304                         /* all_mem is off to avoid spurious msg in "i files" */
1305         0, 0,                   /* Section pointers */
1306         OPS_MAGIC,              /* Always the last thing */
1307 };
1308 /* ==> Remember when reading at end of file, there are two "ops" structs here. */
1309 \f
1310 void
1311 _initialize_vx ()
1312 {
1313
1314  add_show_from_set
1315     (add_set_cmd ("vxworks-timeout", class_support, var_uinteger,
1316                   (char *) &rpcTimeout.tv_sec,
1317                   "Set seconds to wait for rpc calls to return.\n\
1318 Set the number of seconds to wait for rpc calls to return.", &setlist),
1319      &showlist);
1320
1321    add_target (&vx_ops);
1322   add_target (&vx_run_ops);
1323 }