gdb/procfs.c

   1 /* Machine independent support for SVR4 /proc (process file system) for GDB.
   2    Copyright (C) 1991 Free Software Foundation, Inc.
   3    Written by Fred Fish at 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
  22 /*                      N  O  T  E  S
  23
  24 For information on the details of using /proc consult section proc(4)
  25 in the UNIX System V Release 4 System Administrator's Reference Manual.
  26
  27 The general register and floating point register sets are manipulated by
  28 separate ioctl's.  This file makes the assumption that if FP0_REGNUM is
  29 defined, then support for the floating point register set is desired,
  30 regardless of whether or not the actual target has floating point hardware.
  31
  32  */
  33
  34
  35 #include "defs.h"
  36
  37 #ifdef USE_PROC_FS      /* Entire file goes away if not using /proc */
  38
  39 #include <time.h>
  40 #include <sys/procfs.h>
  41 #include <fcntl.h>
  42 #include <errno.h>
  43 #include <string.h>
  44
  45 #include "inferior.h"
  46 #include "target.h"
  47 #include "command.h"
  48
  49 #define MAX_SYSCALLS    256     /* Maximum number of syscalls for table */
  50
  51 #ifndef PROC_NAME_FMT
  52 #define PROC_NAME_FMT "/proc/%05d"
  53 #endif
  54
  55 #if 1   /* FIXME: Gross and ugly hack to resolve coredep.c global */
  56 CORE_ADDR kernel_u_addr;
  57 #endif
  58
  59 #ifdef BROKEN_SIGINFO_H         /* Workaround broken SGS <sys/siginfo.h> */
  60 #undef si_pid
  61 #define si_pid _data._proc.pid
  62 #undef si_uid
  63 #define si_uid _data._proc._pdata._kill.uid
  64 #endif /* BROKEN_SIGINFO_H */
  65
  66 /*  All access to the inferior, either one started by gdb or one that has
  67     been attached to, is controlled by an instance of a procinfo structure,
  68     defined below.  Since gdb currently only handles one inferior at a time,
  69     the procinfo structure for the inferior is statically allocated and
  70     only one exists at any given time.  There is a separate procinfo
  71     structure for use by the "info proc" command, so that we can print
  72     useful information about any random process without interfering with
  73     the inferior's procinfo information. */
  74
  75 struct procinfo {
  76   int valid;                    /* Nonzero if pid, fd, & pathname are valid */
  77   int pid;                      /* Process ID of inferior */
  78   int fd;                       /* File descriptor for /proc entry */
  79   char *pathname;               /* Pathname to /proc entry */
  80   int was_stopped;              /* Nonzero if was stopped prior to attach */
  81   int nopass_next_sigstop;      /* Don't pass a sigstop on next resume */
  82   prrun_t prrun;                /* Control state when it is run */
  83   prstatus_t prstatus;          /* Current process status info */
  84   gregset_t gregset;            /* General register set */
  85   fpregset_t fpregset;          /* Floating point register set */
  86   fltset_t fltset;              /* Current traced hardware fault set */
  87   sigset_t trace;               /* Current traced signal set */
  88   sysset_t exitset;             /* Current traced system call exit set */
  89   sysset_t entryset;            /* Current traced system call entry set */
  90   fltset_t saved_fltset;        /* Saved traced hardware fault set */
  91   sigset_t saved_trace;         /* Saved traced signal set */
  92   sigset_t saved_sighold;       /* Saved held signal set */
  93   sysset_t saved_exitset;       /* Saved traced system call exit set */
  94   sysset_t saved_entryset;      /* Saved traced system call entry set */
  95 };
  96
  97 static struct procinfo pi;      /* Inferior's process information */
  98
  99 /*  Much of the information used in the /proc interface, particularly for
 100     printing status information, is kept as tables of structures of the
 101     following form.  These tables can be used to map numeric values to
 102     their symbolic names and to a string that describes their specific use. */
 103
 104 struct trans {
 105   int value;                    /* The numeric value */
 106   char *name;                   /* The equivalent symbolic value */
 107   char *desc;                   /* Short description of value */
 108 };
 109
 110 /*  Translate bits in the pr_flags member of the prstatus structure, into the
 111     names and desc information. */
 112
 113 static struct trans pr_flag_table[] =
 114 {
 115 #if defined (PR_STOPPED)
 116   PR_STOPPED, "PR_STOPPED", "Process is stopped",
 117 #endif
 118 #if defined (PR_ISTOP)
 119   PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest",
 120 #endif
 121 #if defined (PR_DSTOP)
 122   PR_DSTOP, "PR_DSTOP", "A stop directive is in effect",
 123 #endif
 124 #if defined (PR_ASLEEP)
 125   PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call",
 126 #endif
 127 #if defined (PR_FORK)
 128   PR_FORK, "PR_FORK", "Inherit-on-fork is in effect",
 129 #endif
 130 #if defined (PR_RLC)
 131   PR_RLC, "PR_RLC", "Run-on-last-close is in effect",
 132 #endif
 133 #if defined (PR_PTRACE)
 134   PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace",
 135 #endif
 136 #if defined (PR_PCINVAL)
 137   PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address",
 138 #endif
 139 #if defined (PR_ISSYS)
 140   PR_ISSYS, "PR_ISSYS", "Is a system process",
 141 #endif
 142 #if defined (PR_STEP)
 143   PR_STEP, "PR_STEP", "Process has single step pending",
 144 #endif
 145 #if defined (PR_KLC)
 146   PR_KLC, "PR_KLC", "Kill-on-last-close is in effect",
 147 #endif
 148 #if defined (PR_ASYNC)
 149   PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect",
 150 #endif
 151 #if defined (PR_PCOMPAT)
 152   PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect",
 153 #endif
 154  0, NULL, NULL
 155 };
 156
 157 /*  Translate values in the pr_why field of the prstatus struct. */
 158
 159 static struct trans pr_why_table[] =
 160 {
 161 #if defined (PR_REQUESTED)
 162  PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP",
 163 #endif
 164 #if defined (PR_SIGNALLED)
 165  PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal",
 166 #endif
 167 #if defined (PR_FAULTED)
 168  PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault",
 169 #endif
 170 #if defined (PR_SYSENTRY)
 171  PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call",
 172 #endif
 173 #if defined (PR_SYSEXIT)
 174  PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call",
 175 #endif
 176 #if defined (PR_JOBCONTROL)
 177  PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action",
 178 #endif
 179 #if defined (PR_SUSPENDED)
 180  PR_SUSPENDED, "PR_SUSPENDED", "Process suspended",
 181 #endif
 182  0, NULL, NULL
 183 };
 184
 185 /*  Hardware fault translation table. */
 186
 187 static struct trans faults_table[] =
 188 {
 189 #if defined (FLTILL)
 190  FLTILL, "FLTILL", "Illegal instruction",
 191 #endif
 192 #if defined (FLTPRIV)
 193  FLTPRIV, "FLTPRIV", "Privileged instruction",
 194 #endif
 195 #if defined (FLTBPT)
 196  FLTBPT, "FLTBPT", "Breakpoint trap",
 197 #endif
 198 #if defined (FLTTRACE)
 199  FLTTRACE, "FLTTRACE", "Trace trap",
 200 #endif
 201 #if defined (FLTACCESS)
 202  FLTACCESS, "FLTACCESS", "Memory access fault",
 203 #endif
 204 #if defined (FLTBOUNDS)
 205  FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation",
 206 #endif
 207 #if defined (FLTIOVF)
 208  FLTIOVF, "FLTIOVF", "Integer overflow",
 209 #endif
 210 #if defined (FLTIZDIV)
 211  FLTIZDIV, "FLTIZDIV", "Integer zero divide",
 212 #endif
 213 #if defined (FLTFPE)
 214  FLTFPE, "FLTFPE", "Floating-point exception",
 215 #endif
 216 #if defined (FLTSTACK)
 217  FLTSTACK, "FLTSTACK", "Unrecoverable stack fault",
 218 #endif
 219 #if defined (FLTPAGE)
 220  FLTPAGE, "FLTPAGE", "Recoverable page fault",
 221 #endif
 222  0, NULL, NULL
 223 };
 224
 225 /* Translation table for signal generation information.  See UNIX System
 226    V Release 4 Programmer's Reference Manual, siginfo(5).  */
 227
 228 static struct sigcode {
 229   int signo;
 230   int code;
 231   char *codename;
 232   char *desc;
 233 } siginfo_table[] = {
 234 #if defined (SIGILL) && defined (ILL_ILLOPC)
 235   SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode",
 236 #endif
 237 #if defined (SIGILL) && defined (ILL_ILLOPN)
 238   SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand",
 239 #endif
 240 #if defined (SIGILL) && defined (ILL_ILLADR)
 241   SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode",
 242 #endif
 243 #if defined (SIGILL) && defined (ILL_ILLTRP)
 244   SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap",
 245 #endif
 246 #if defined (SIGILL) && defined (ILL_PRVOPC)
 247   SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode",
 248 #endif
 249 #if defined (SIGILL) && defined (ILL_PRVREG)
 250   SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register",
 251 #endif
 252 #if defined (SIGILL) && defined (ILL_COPROC)
 253   SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error",
 254 #endif
 255 #if defined (SIGILL) && defined (ILL_BADSTK)
 256   SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error",
 257 #endif
 258 #if defined (SIGFPE) && defined (FPE_INTDIV)
 259   SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero",
 260 #endif
 261 #if defined (SIGFPE) && defined (FPE_INTOVF)
 262   SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow",
 263 #endif
 264 #if defined (SIGFPE) && defined (FPE_FLTDIV)
 265   SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero",
 266 #endif
 267 #if defined (SIGFPE) && defined (FPE_FLTOVF)
 268   SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow",
 269 #endif
 270 #if defined (SIGFPE) && defined (FPE_FLTUND)
 271   SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow",
 272 #endif
 273 #if defined (SIGFPE) && defined (FPE_FLTRES)
 274   SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result",
 275 #endif
 276 #if defined (SIGFPE) && defined (FPE_FLTINV)
 277   SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation",
 278 #endif
 279 #if defined (SIGFPE) && defined (FPE_FLTSUB)
 280   SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range",
 281 #endif
 282 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
 283   SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object",
 284 #endif
 285 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
 286   SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object",
 287 #endif
 288 #if defined (SIGBUS) && defined (BUS_ADRALN)
 289   SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment",
 290 #endif
 291 #if defined (SIGBUS) && defined (BUS_ADRERR)
 292   SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address",
 293 #endif
 294 #if defined (SIGBUS) && defined (BUS_OBJERR)
 295   SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error",
 296 #endif
 297 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
 298   SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint",
 299 #endif
 300 #if defined (SIGTRAP) && defined (TRAP_TRACE)
 301   SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap",
 302 #endif
 303 #if defined (SIGCLD) && defined (CLD_EXITED)
 304   SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited",
 305 #endif
 306 #if defined (SIGCLD) && defined (CLD_KILLED)
 307   SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed",
 308 #endif
 309 #if defined (SIGCLD) && defined (CLD_DUMPED)
 310   SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally",
 311 #endif
 312 #if defined (SIGCLD) && defined (CLD_TRAPPED)
 313   SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped",
 314 #endif
 315 #if defined (SIGCLD) && defined (CLD_STOPPED)
 316   SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped",
 317 #endif
 318 #if defined (SIGCLD) && defined (CLD_CONTINUED)
 319   SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued",
 320 #endif
 321 #if defined (SIGPOLL) && defined (POLL_IN)
 322   SIGPOLL, POLL_IN, "POLL_IN", "Input input available",
 323 #endif
 324 #if defined (SIGPOLL) && defined (POLL_OUT)
 325   SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available",
 326 #endif
 327 #if defined (SIGPOLL) && defined (POLL_MSG)
 328   SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available",
 329 #endif
 330 #if defined (SIGPOLL) && defined (POLL_ERR)
 331   SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error",
 332 #endif
 333 #if defined (SIGPOLL) && defined (POLL_PRI)
 334   SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available",
 335 #endif
 336 #if defined (SIGPOLL) && defined (POLL_HUP)
 337   SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected",
 338 #endif
 339   0, 0, NULL, NULL
 340 };
 341
 342 static char *syscall_table[MAX_SYSCALLS];
 343
 344 /* Prototypes for local functions */
 345
 346 static void
 347 set_proc_siginfo PARAMS ((struct procinfo *, int));
 348
 349 static void
 350 init_syscall_table PARAMS ((void));
 351
 352 static char *
 353 syscallname PARAMS ((int));
 354
 355 static char *
 356 signalname PARAMS ((int));
 357
 358 static char *
 359 errnoname PARAMS ((int));
 360
 361 static int
 362 proc_address_to_fd PARAMS ((CORE_ADDR, int));
 363
 364 static int
 365 open_proc_file PARAMS ((int, struct procinfo *));
 366
 367 static void
 368 close_proc_file PARAMS ((struct procinfo *));
 369
 370 static void
 371 unconditionally_kill_inferior PARAMS ((void));
 372
 373 static void
 374 proc_init_failed PARAMS ((char *));
 375
 376 static void
 377 info_proc PARAMS ((char *, int));
 378
 379 static void
 380 info_proc_flags PARAMS ((struct procinfo *, int));
 381
 382 static void
 383 info_proc_stop PARAMS ((struct procinfo *, int));
 384
 385 static void
 386 info_proc_siginfo PARAMS ((struct procinfo *, int));
 387
 388 static void
 389 info_proc_syscalls PARAMS ((struct procinfo *, int));
 390
 391 static void
 392 info_proc_mappings PARAMS ((struct procinfo *, int));
 393
 394 static void
 395 info_proc_signals PARAMS ((struct procinfo *, int));
 396
 397 static void
 398 info_proc_faults PARAMS ((struct procinfo *, int));
 399
 400 static char *
 401 mappingflags PARAMS ((long));
 402
 403 static char *
 404 lookupname PARAMS ((struct trans *, unsigned int, char *));
 405
 406 static char *
 407 lookupdesc PARAMS ((struct trans *, unsigned int));
 408
 409 /* External function prototypes that can't be easily included in any
 410    header file because the args are typedefs in system include files. */
 411
 412 extern void
 413 supply_gregset PARAMS ((gregset_t *));
 414
 415 extern void
 416 fill_gregset PARAMS ((gregset_t *, int));
 417
 418 extern void
 419 supply_fpregset PARAMS ((fpregset_t *));
 420
 421 extern void
 422 fill_fpregset PARAMS ((fpregset_t *, int));
 423
 424 /*
 425
 426 LOCAL FUNCTION
 427
 428         lookupdesc -- translate a value to a summary desc string
 429
 430 SYNOPSIS
 431
 432         static char *lookupdesc (struct trans *transp, unsigned int val);
 433
 434 DESCRIPTION
 435
 436         Given a pointer to a translation table and a value to be translated,
 437         lookup the desc string and return it.
 438  */
 439
 440 static char *
 441 lookupdesc (transp, val)
 442      struct trans *transp;
 443      unsigned int val;
 444 {
 445   char *desc;
 446
 447   for (desc = NULL; transp -> name != NULL; transp++)
 448     {
 449       if (transp -> value == val)
 450         {
 451           desc = transp -> desc;
 452           break;
 453         }
 454     }
 455
 456   /* Didn't find a translation for the specified value, set a default one. */
 457
 458   if (desc == NULL)
 459     {
 460       desc = "Unknown";
 461     }
 462   return (desc);
 463 }
 464
 465 /*
 466
 467 LOCAL FUNCTION
 468
 469         lookupname -- translate a value to symbolic name
 470
 471 SYNOPSIS
 472
 473         static char *lookupname (struct trans *transp, unsigned int val,
 474                                  char *prefix);
 475
 476 DESCRIPTION
 477
 478         Given a pointer to a translation table, a value to be translated,
 479         and a default prefix to return if the value can't be translated,
 480         match the value with one of the translation table entries and
 481         return a pointer to the symbolic name.
 482
 483         If no match is found it just returns the value as a printable string,
 484         with the given prefix.  The previous such value, if any, is freed
 485         at this time.
 486  */
 487
 488 static char *
 489 lookupname (transp, val, prefix)
 490      struct trans *transp;
 491      unsigned int val;
 492      char *prefix;
 493 {
 494   static char *locbuf;
 495   char *name;
 496
 497   for (name = NULL; transp -> name != NULL; transp++)
 498     {
 499       if (transp -> value == val)
 500         {
 501           name = transp -> name;
 502           break;
 503         }
 504     }
 505
 506   /* Didn't find a translation for the specified value, build a default
 507      one using the specified prefix and return it.  The lifetime of
 508      the value is only until the next one is needed. */
 509
 510   if (name == NULL)
 511     {
 512       if (locbuf != NULL)
 513         {
 514           free (locbuf);
 515         }
 516       locbuf = xmalloc (strlen (prefix) + 16);
 517       (void) sprintf (locbuf, "%s %u", prefix, val);
 518       name = locbuf;
 519     }
 520   return (name);
 521 }
 522
 523 static char *
 524 sigcodename (sip)
 525      siginfo_t *sip;
 526 {
 527   struct sigcode *scp;
 528   char *name = NULL;
 529   static char locbuf[32];
 530
 531   for (scp = siginfo_table; scp -> codename != NULL; scp++)
 532     {
 533       if ((scp -> signo == sip -> si_signo) &&
 534           (scp -> code == sip -> si_code))
 535         {
 536           name = scp -> codename;
 537           break;
 538         }
 539     }
 540   if (name == NULL)
 541     {
 542       (void) sprintf (locbuf, "sigcode %u", sip -> si_signo);
 543       name = locbuf;
 544     }
 545   return (name);
 546 }
 547
 548 static char *sigcodedesc (sip)
 549      siginfo_t *sip;
 550 {
 551   struct sigcode *scp;
 552   char *desc = NULL;
 553
 554   for (scp = siginfo_table; scp -> codename != NULL; scp++)
 555     {
 556       if ((scp -> signo == sip -> si_signo) &&
 557           (scp -> code == sip -> si_code))
 558         {
 559           desc = scp -> desc;
 560           break;
 561         }
 562     }
 563   if (desc == NULL)
 564     {
 565       desc = "Unrecognized signal or trap use";
 566     }
 567   return (desc);
 568 }
 569
 570 /*
 571
 572 LOCAL FUNCTION
 573
 574         syscallname - translate a system call number into a system call name
 575
 576 SYNOPSIS
 577
 578         char *syscallname (int syscallnum)
 579
 580 DESCRIPTION
 581
 582         Given a system call number, translate it into the printable name
 583         of a system call, or into "syscall <num>" if it is an unknown
 584         number.
 585  */
 586
 587 static char *
 588 syscallname (syscallnum)
 589      int syscallnum;
 590 {
 591   static char locbuf[32];
 592   char *rtnval;
 593
 594   if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
 595     {
 596       rtnval = syscall_table[syscallnum];
 597     }
 598   else
 599     {
 600       (void) sprintf (locbuf, "syscall %u", syscallnum);
 601       rtnval = locbuf;
 602     }
 603   return (rtnval);
 604 }
 605
 606 /*
 607
 608 LOCAL FUNCTION
 609
 610         init_syscall_table - initialize syscall translation table
 611
 612 SYNOPSIS
 613
 614         void init_syscall_table (void)
 615
 616 DESCRIPTION
 617
 618         Dynamically initialize the translation table to convert system
 619         call numbers into printable system call names.  Done once per
 620         gdb run, on initialization.
 621
 622 NOTES
 623
 624         This is awfully ugly, but preprocessor tricks to make it prettier
 625         tend to be nonportable.
 626  */
 627
 628 static void
 629 init_syscall_table ()
 630 {
 631 #if defined (SYS_exit)
 632   syscall_table[SYS_exit] = "exit";
 633 #endif
 634 #if defined (SYS_fork)
 635   syscall_table[SYS_fork] = "fork";
 636 #endif
 637 #if defined (SYS_read)
 638   syscall_table[SYS_read] = "read";
 639 #endif
 640 #if defined (SYS_write)
 641   syscall_table[SYS_write] = "write";
 642 #endif
 643 #if defined (SYS_open)
 644   syscall_table[SYS_open] = "open";
 645 #endif
 646 #if defined (SYS_close)
 647   syscall_table[SYS_close] = "close";
 648 #endif
 649 #if defined (SYS_wait)
 650   syscall_table[SYS_wait] = "wait";
 651 #endif
 652 #if defined (SYS_creat)
 653   syscall_table[SYS_creat] = "creat";
 654 #endif
 655 #if defined (SYS_link)
 656   syscall_table[SYS_link] = "link";
 657 #endif
 658 #if defined (SYS_unlink)
 659   syscall_table[SYS_unlink] = "unlink";
 660 #endif
 661 #if defined (SYS_exec)
 662   syscall_table[SYS_exec] = "exec";
 663 #endif
 664 #if defined (SYS_execv)
 665   syscall_table[SYS_execv] = "execv";
 666 #endif
 667 #if defined (SYS_execve)
 668   syscall_table[SYS_execve] = "execve";
 669 #endif
 670 #if defined (SYS_chdir)
 671   syscall_table[SYS_chdir] = "chdir";
 672 #endif
 673 #if defined (SYS_time)
 674   syscall_table[SYS_time] = "time";
 675 #endif
 676 #if defined (SYS_mknod)
 677   syscall_table[SYS_mknod] = "mknod";
 678 #endif
 679 #if defined (SYS_chmod)
 680   syscall_table[SYS_chmod] = "chmod";
 681 #endif
 682 #if defined (SYS_chown)
 683   syscall_table[SYS_chown] = "chown";
 684 #endif
 685 #if defined (SYS_brk)
 686   syscall_table[SYS_brk] = "brk";
 687 #endif
 688 #if defined (SYS_stat)
 689   syscall_table[SYS_stat] = "stat";
 690 #endif
 691 #if defined (SYS_lseek)
 692   syscall_table[SYS_lseek] = "lseek";
 693 #endif
 694 #if defined (SYS_getpid)
 695   syscall_table[SYS_getpid] = "getpid";
 696 #endif
 697 #if defined (SYS_mount)
 698   syscall_table[SYS_mount] = "mount";
 699 #endif
 700 #if defined (SYS_umount)
 701   syscall_table[SYS_umount] = "umount";
 702 #endif
 703 #if defined (SYS_setuid)
 704   syscall_table[SYS_setuid] = "setuid";
 705 #endif
 706 #if defined (SYS_getuid)
 707   syscall_table[SYS_getuid] = "getuid";
 708 #endif
 709 #if defined (SYS_stime)
 710   syscall_table[SYS_stime] = "stime";
 711 #endif
 712 #if defined (SYS_ptrace)
 713   syscall_table[SYS_ptrace] = "ptrace";
 714 #endif
 715 #if defined (SYS_alarm)
 716   syscall_table[SYS_alarm] = "alarm";
 717 #endif
 718 #if defined (SYS_fstat)
 719   syscall_table[SYS_fstat] = "fstat";
 720 #endif
 721 #if defined (SYS_pause)
 722   syscall_table[SYS_pause] = "pause";
 723 #endif
 724 #if defined (SYS_utime)
 725   syscall_table[SYS_utime] = "utime";
 726 #endif
 727 #if defined (SYS_stty)
 728   syscall_table[SYS_stty] = "stty";
 729 #endif
 730 #if defined (SYS_gtty)
 731   syscall_table[SYS_gtty] = "gtty";
 732 #endif
 733 #if defined (SYS_access)
 734   syscall_table[SYS_access] = "access";
 735 #endif
 736 #if defined (SYS_nice)
 737   syscall_table[SYS_nice] = "nice";
 738 #endif
 739 #if defined (SYS_statfs)
 740   syscall_table[SYS_statfs] = "statfs";
 741 #endif
 742 #if defined (SYS_sync)
 743   syscall_table[SYS_sync] = "sync";
 744 #endif
 745 #if defined (SYS_kill)
 746   syscall_table[SYS_kill] = "kill";
 747 #endif
 748 #if defined (SYS_fstatfs)
 749   syscall_table[SYS_fstatfs] = "fstatfs";
 750 #endif
 751 #if defined (SYS_pgrpsys)
 752   syscall_table[SYS_pgrpsys] = "pgrpsys";
 753 #endif
 754 #if defined (SYS_xenix)
 755   syscall_table[SYS_xenix] = "xenix";
 756 #endif
 757 #if defined (SYS_dup)
 758   syscall_table[SYS_dup] = "dup";
 759 #endif
 760 #if defined (SYS_pipe)
 761   syscall_table[SYS_pipe] = "pipe";
 762 #endif
 763 #if defined (SYS_times)
 764   syscall_table[SYS_times] = "times";
 765 #endif
 766 #if defined (SYS_profil)
 767   syscall_table[SYS_profil] = "profil";
 768 #endif
 769 #if defined (SYS_plock)
 770   syscall_table[SYS_plock] = "plock";
 771 #endif
 772 #if defined (SYS_setgid)
 773   syscall_table[SYS_setgid] = "setgid";
 774 #endif
 775 #if defined (SYS_getgid)
 776   syscall_table[SYS_getgid] = "getgid";
 777 #endif
 778 #if defined (SYS_signal)
 779   syscall_table[SYS_signal] = "signal";
 780 #endif
 781 #if defined (SYS_msgsys)
 782   syscall_table[SYS_msgsys] = "msgsys";
 783 #endif
 784 #if defined (SYS_sys3b)
 785   syscall_table[SYS_sys3b] = "sys3b";
 786 #endif
 787 #if defined (SYS_acct)
 788   syscall_table[SYS_acct] = "acct";
 789 #endif
 790 #if defined (SYS_shmsys)
 791   syscall_table[SYS_shmsys] = "shmsys";
 792 #endif
 793 #if defined (SYS_semsys)
 794   syscall_table[SYS_semsys] = "semsys";
 795 #endif
 796 #if defined (SYS_ioctl)
 797   syscall_table[SYS_ioctl] = "ioctl";
 798 #endif
 799 #if defined (SYS_uadmin)
 800   syscall_table[SYS_uadmin] = "uadmin";
 801 #endif
 802 #if defined (SYS_utssys)
 803   syscall_table[SYS_utssys] = "utssys";
 804 #endif
 805 #if defined (SYS_fsync)
 806   syscall_table[SYS_fsync] = "fsync";
 807 #endif
 808 #if defined (SYS_umask)
 809   syscall_table[SYS_umask] = "umask";
 810 #endif
 811 #if defined (SYS_chroot)
 812   syscall_table[SYS_chroot] = "chroot";
 813 #endif
 814 #if defined (SYS_fcntl)
 815   syscall_table[SYS_fcntl] = "fcntl";
 816 #endif
 817 #if defined (SYS_ulimit)
 818   syscall_table[SYS_ulimit] = "ulimit";
 819 #endif
 820 #if defined (SYS_rfsys)
 821   syscall_table[SYS_rfsys] = "rfsys";
 822 #endif
 823 #if defined (SYS_rmdir)
 824   syscall_table[SYS_rmdir] = "rmdir";
 825 #endif
 826 #if defined (SYS_mkdir)
 827   syscall_table[SYS_mkdir] = "mkdir";
 828 #endif
 829 #if defined (SYS_getdents)
 830   syscall_table[SYS_getdents] = "getdents";
 831 #endif
 832 #if defined (SYS_sysfs)
 833   syscall_table[SYS_sysfs] = "sysfs";
 834 #endif
 835 #if defined (SYS_getmsg)
 836   syscall_table[SYS_getmsg] = "getmsg";
 837 #endif
 838 #if defined (SYS_putmsg)
 839   syscall_table[SYS_putmsg] = "putmsg";
 840 #endif
 841 #if defined (SYS_poll)
 842   syscall_table[SYS_poll] = "poll";
 843 #endif
 844 #if defined (SYS_lstat)
 845   syscall_table[SYS_lstat] = "lstat";
 846 #endif
 847 #if defined (SYS_symlink)
 848   syscall_table[SYS_symlink] = "symlink";
 849 #endif
 850 #if defined (SYS_readlink)
 851   syscall_table[SYS_readlink] = "readlink";
 852 #endif
 853 #if defined (SYS_setgroups)
 854   syscall_table[SYS_setgroups] = "setgroups";
 855 #endif
 856 #if defined (SYS_getgroups)
 857   syscall_table[SYS_getgroups] = "getgroups";
 858 #endif
 859 #if defined (SYS_fchmod)
 860   syscall_table[SYS_fchmod] = "fchmod";
 861 #endif
 862 #if defined (SYS_fchown)
 863   syscall_table[SYS_fchown] = "fchown";
 864 #endif
 865 #if defined (SYS_sigprocmask)
 866   syscall_table[SYS_sigprocmask] = "sigprocmask";
 867 #endif
 868 #if defined (SYS_sigsuspend)
 869   syscall_table[SYS_sigsuspend] = "sigsuspend";
 870 #endif
 871 #if defined (SYS_sigaltstack)
 872   syscall_table[SYS_sigaltstack] = "sigaltstack";
 873 #endif
 874 #if defined (SYS_sigaction)
 875   syscall_table[SYS_sigaction] = "sigaction";
 876 #endif
 877 #if defined (SYS_sigpending)
 878   syscall_table[SYS_sigpending] = "sigpending";
 879 #endif
 880 #if defined (SYS_context)
 881   syscall_table[SYS_context] = "context";
 882 #endif
 883 #if defined (SYS_evsys)
 884   syscall_table[SYS_evsys] = "evsys";
 885 #endif
 886 #if defined (SYS_evtrapret)
 887   syscall_table[SYS_evtrapret] = "evtrapret";
 888 #endif
 889 #if defined (SYS_statvfs)
 890   syscall_table[SYS_statvfs] = "statvfs";
 891 #endif
 892 #if defined (SYS_fstatvfs)
 893   syscall_table[SYS_fstatvfs] = "fstatvfs";
 894 #endif
 895 #if defined (SYS_nfssys)
 896   syscall_table[SYS_nfssys] = "nfssys";
 897 #endif
 898 #if defined (SYS_waitsys)
 899   syscall_table[SYS_waitsys] = "waitsys";
 900 #endif
 901 #if defined (SYS_sigsendsys)
 902   syscall_table[SYS_sigsendsys] = "sigsendsys";
 903 #endif
 904 #if defined (SYS_hrtsys)
 905   syscall_table[SYS_hrtsys] = "hrtsys";
 906 #endif
 907 #if defined (SYS_acancel)
 908   syscall_table[SYS_acancel] = "acancel";
 909 #endif
 910 #if defined (SYS_async)
 911   syscall_table[SYS_async] = "async";
 912 #endif
 913 #if defined (SYS_priocntlsys)
 914   syscall_table[SYS_priocntlsys] = "priocntlsys";
 915 #endif
 916 #if defined (SYS_pathconf)
 917   syscall_table[SYS_pathconf] = "pathconf";
 918 #endif
 919 #if defined (SYS_mincore)
 920   syscall_table[SYS_mincore] = "mincore";
 921 #endif
 922 #if defined (SYS_mmap)
 923   syscall_table[SYS_mmap] = "mmap";
 924 #endif
 925 #if defined (SYS_mprotect)
 926   syscall_table[SYS_mprotect] = "mprotect";
 927 #endif
 928 #if defined (SYS_munmap)
 929   syscall_table[SYS_munmap] = "munmap";
 930 #endif
 931 #if defined (SYS_fpathconf)
 932   syscall_table[SYS_fpathconf] = "fpathconf";
 933 #endif
 934 #if defined (SYS_vfork)
 935   syscall_table[SYS_vfork] = "vfork";
 936 #endif
 937 #if defined (SYS_fchdir)
 938   syscall_table[SYS_fchdir] = "fchdir";
 939 #endif
 940 #if defined (SYS_readv)
 941   syscall_table[SYS_readv] = "readv";
 942 #endif
 943 #if defined (SYS_writev)
 944   syscall_table[SYS_writev] = "writev";
 945 #endif
 946 #if defined (SYS_xstat)
 947   syscall_table[SYS_xstat] = "xstat";
 948 #endif
 949 #if defined (SYS_lxstat)
 950   syscall_table[SYS_lxstat] = "lxstat";
 951 #endif
 952 #if defined (SYS_fxstat)
 953   syscall_table[SYS_fxstat] = "fxstat";
 954 #endif
 955 #if defined (SYS_xmknod)
 956   syscall_table[SYS_xmknod] = "xmknod";
 957 #endif
 958 #if defined (SYS_clocal)
 959   syscall_table[SYS_clocal] = "clocal";
 960 #endif
 961 #if defined (SYS_setrlimit)
 962   syscall_table[SYS_setrlimit] = "setrlimit";
 963 #endif
 964 #if defined (SYS_getrlimit)
 965   syscall_table[SYS_getrlimit] = "getrlimit";
 966 #endif
 967 #if defined (SYS_lchown)
 968   syscall_table[SYS_lchown] = "lchown";
 969 #endif
 970 #if defined (SYS_memcntl)
 971   syscall_table[SYS_memcntl] = "memcntl";
 972 #endif
 973 #if defined (SYS_getpmsg)
 974   syscall_table[SYS_getpmsg] = "getpmsg";
 975 #endif
 976 #if defined (SYS_putpmsg)
 977   syscall_table[SYS_putpmsg] = "putpmsg";
 978 #endif
 979 #if defined (SYS_rename)
 980   syscall_table[SYS_rename] = "rename";
 981 #endif
 982 #if defined (SYS_uname)
 983   syscall_table[SYS_uname] = "uname";
 984 #endif
 985 #if defined (SYS_setegid)
 986   syscall_table[SYS_setegid] = "setegid";
 987 #endif
 988 #if defined (SYS_sysconfig)
 989   syscall_table[SYS_sysconfig] = "sysconfig";
 990 #endif
 991 #if defined (SYS_adjtime)
 992   syscall_table[SYS_adjtime] = "adjtime";
 993 #endif
 994 #if defined (SYS_systeminfo)
 995   syscall_table[SYS_systeminfo] = "systeminfo";
 996 #endif
 997 #if defined (SYS_seteuid)
 998   syscall_table[SYS_seteuid] = "seteuid";
 999 #endif
1000 }
1001
1002 /*
1003
1004 GLOBAL FUNCTION
1005
1006         ptrace -- override library version to force errors for /proc version
1007
1008 SYNOPSIS
1009
1010         int ptrace (int request, int pid, PTRACE_ARG3_TYPE arg3, int arg4)
1011
1012 DESCRIPTION
1013
1014         When gdb is configured to use /proc, it should not be calling
1015         or otherwise attempting to use ptrace.  In order to catch errors
1016         where use of /proc is configured, but some routine is still calling
1017         ptrace, we provide a local version of a function with that name
1018         that does nothing but issue an error message.
1019 */
1020
1021 int
1022 ptrace (request, pid, arg3, arg4)
1023      int request;
1024      int pid;
1025      PTRACE_ARG3_TYPE arg3;
1026      int arg4;
1027 {
1028   error ("internal error - there is a call to ptrace() somewhere");
1029   /*NOTREACHED*/
1030 }
1031
1032 /*
1033
1034 GLOBAL FUNCTION
1035
1036         kill_inferior_fast -- kill inferior while gdb is exiting
1037
1038 SYNOPSIS
1039
1040         void kill_inferior_fast (void)
1041
1042 DESCRIPTION
1043
1044         This is used when GDB is exiting.  It gives less chance of error.
1045
1046 NOTES
1047
1048         Don't attempt to kill attached inferiors since we may be called
1049         when gdb is in the process of aborting, and killing the attached
1050         inferior may be very anti-social.  This is particularly true if we
1051         were attached just so we could use the /proc facilities to get
1052         detailed information about it's status.
1053
1054 */
1055
1056 void
1057 kill_inferior_fast ()
1058 {
1059   if (inferior_pid != 0 && !attach_flag)
1060     {
1061       unconditionally_kill_inferior ();
1062     }
1063 }
1064
1065 /*
1066
1067 GLOBAL FUNCTION
1068
1069         kill_inferior - kill any currently inferior
1070
1071 SYNOPSIS
1072
1073         void kill_inferior (void)
1074
1075 DESCRIPTION
1076
1077         Kill any current inferior.
1078
1079 NOTES
1080
1081         Kills even attached inferiors.  Presumably the user has already
1082         been prompted that the inferior is an attached one rather than
1083         one started by gdb.  (FIXME?)
1084
1085 */
1086
1087 void
1088 kill_inferior ()
1089 {
1090   if (inferior_pid != 0)
1091     {
1092       unconditionally_kill_inferior ();
1093       target_mourn_inferior ();
1094     }
1095 }
1096
1097 /*
1098
1099 LOCAL FUNCTION
1100
1101         unconditionally_kill_inferior - terminate the inferior
1102
1103 SYNOPSIS
1104
1105         static void unconditionally_kill_inferior (void)
1106
1107 DESCRIPTION
1108
1109         Kill the current inferior.  Should not be called until it
1110         is at least tested that there is an inferior.
1111
1112 NOTE
1113
1114         A possibly useful enhancement would be to first try sending
1115         the inferior a terminate signal, politely asking it to commit
1116         suicide, before we murder it.
1117
1118 */
1119
1120 static void
1121 unconditionally_kill_inferior ()
1122 {
1123   int signo;
1124
1125   signo = SIGKILL;
1126   (void) ioctl (pi.fd, PIOCKILL, &signo);
1127   close_proc_file (&pi);
1128   wait ((int *) 0);
1129 }
1130
1131 /*
1132
1133 GLOBAL FUNCTION
1134
1135         child_xfer_memory -- copy data to or from inferior memory space
1136
1137 SYNOPSIS
1138
1139         int child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
1140                 int dowrite, struct target_ops target)
1141
1142 DESCRIPTION
1143
1144         Copy LEN bytes to/from inferior's memory starting at MEMADDR
1145         from/to debugger memory starting at MYADDR.  Copy from inferior
1146         if DOWRITE is zero or to inferior if DOWRITE is nonzero.
1147
1148         Returns the length copied, which is either the LEN argument or
1149         zero.  This xfer function does not do partial moves, since child_ops
1150         doesn't allow memory operations to cross below us in the target stack
1151         anyway.
1152
1153 NOTES
1154
1155         The /proc interface makes this an almost trivial task.
1156  */
1157
1158
1159 int
1160 child_xfer_memory (memaddr, myaddr, len, dowrite, target)
1161      CORE_ADDR memaddr;
1162      char *myaddr;
1163      int len;
1164      int dowrite;
1165      struct target_ops *target; /* ignored */
1166 {
1167   int nbytes = 0;
1168
1169   if (lseek (pi.fd, (off_t) memaddr, 0) == (off_t) memaddr)
1170     {
1171       if (dowrite)
1172         {
1173           nbytes = write (pi.fd, myaddr, len);
1174         }
1175       else
1176         {
1177           nbytes = read (pi.fd, myaddr, len);
1178         }
1179       if (nbytes < 0)
1180         {
1181           nbytes = 0;
1182         }
1183     }
1184   return (nbytes);
1185 }
1186
1187 /*
1188
1189 GLOBAL FUNCTION
1190
1191         store_inferior_registers -- copy register values back to inferior
1192
1193 SYNOPSIS
1194
1195         void store_inferior_registers (int regno)
1196
1197 DESCRIPTION
1198
1199         Store our current register values back into the inferior.  If
1200         REGNO is -1 then store all the register, otherwise store just
1201         the value specified by REGNO.
1202
1203 NOTES
1204
1205         If we are storing only a single register, we first have to get all
1206         the current values from the process, overwrite the desired register
1207         in the gregset with the one we want from gdb's registers, and then
1208         send the whole set back to the process.  For writing all the
1209         registers, all we have to do is generate the gregset and send it to
1210         the process.
1211
1212         Also note that the process has to be stopped on an event of interest
1213         for this to work, which basically means that it has to have been
1214         run under the control of one of the other /proc ioctl calls and not
1215         ptrace.  Since we don't use ptrace anyway, we don't worry about this
1216         fine point, but it is worth noting for future reference.
1217
1218         Gdb is confused about what this function is supposed to return.
1219         Some versions return a value, others return nothing.  Some are
1220         declared to return a value and actually return nothing.  Gdb ignores
1221         anything returned.  (FIXME)
1222
1223  */
1224
1225 void
1226 store_inferior_registers (regno)
1227      int regno;
1228 {
1229   if (regno != -1)
1230     {
1231       (void) ioctl (pi.fd, PIOCGREG, &pi.gregset);
1232     }
1233   fill_gregset (&pi.gregset, regno);
1234   (void) ioctl (pi.fd, PIOCSREG, &pi.gregset);
1235
1236 #if defined (FP0_REGNUM)
1237
1238   /* Now repeat everything using the floating point register set, if the
1239      target has floating point hardware. Since we ignore the returned value,
1240      we'll never know whether it worked or not anyway. */
1241
1242   if (regno != -1)
1243     {
1244       (void) ioctl (pi.fd, PIOCGFPREG, &pi.fpregset);
1245     }
1246   fill_fpregset (&pi.fpregset, regno);
1247   (void) ioctl (pi.fd, PIOCSFPREG, &pi.fpregset);
1248
1249 #endif  /* FP0_REGNUM */
1250
1251 }
1252
1253 /*
1254
1255 GLOBAL FUNCTION
1256
1257         inferior_proc_init - initialize access to a /proc entry
1258
1259 SYNOPSIS
1260
1261         void inferior_proc_init (int pid)
1262
1263 DESCRIPTION
1264
1265         When gdb starts an inferior, this function is called in the parent
1266         process immediately after the fork.  It waits for the child to stop
1267         on the return from the exec system call (the child itself takes care
1268         of ensuring that this is set up), then sets up the set of signals
1269         and faults that are to be traced.
1270
1271 NOTES
1272
1273         If proc_init_failed ever gets called, control returns to the command
1274         processing loop via the standard error handling code.
1275
1276  */
1277
1278 void
1279 inferior_proc_init (pid)
1280      int pid;
1281 {
1282   if (!open_proc_file (pid, &pi))
1283     {
1284       proc_init_failed ("can't open process file");
1285     }
1286   else
1287     {
1288       (void) memset ((char *) &pi.prrun, 0, sizeof (pi.prrun));
1289       prfillset (&pi.prrun.pr_trace);
1290       proc_signal_handling_change ();
1291       prfillset (&pi.prrun.pr_fault);
1292       prdelset (&pi.prrun.pr_fault, FLTPAGE);
1293       if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
1294         {
1295           proc_init_failed ("PIOCWSTOP failed");
1296         }
1297       else if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault) < 0)
1298         {
1299           proc_init_failed ("PIOCSFAULT failed");
1300         }
1301     }
1302 }
1303
1304 /*
1305
1306 GLOBAL FUNCTION
1307
1308         proc_signal_handling_change
1309
1310 SYNOPSIS
1311
1312         void proc_signal_handling_change (void);
1313
1314 DESCRIPTION
1315
1316         When the user changes the state of gdb's signal handling via the
1317         "handle" command, this function gets called to see if any change
1318         in the /proc interface is required.  It is also called internally
1319         by other /proc interface functions to initialize the state of
1320         the traced signal set.
1321
1322         One thing it does is that signals for which the state is "nostop",
1323         "noprint", and "pass", have their trace bits reset in the pr_trace
1324         field, so that they are no longer traced.  This allows them to be
1325         delivered directly to the inferior without the debugger ever being
1326         involved.
1327  */
1328
1329 void
1330 proc_signal_handling_change ()
1331 {
1332   int signo;
1333
1334   if (pi.valid)
1335     {
1336       for (signo = 0; signo < NSIG; signo++)
1337         {
1338           if (signal_stop_state (signo) == 0 &&
1339               signal_print_state (signo) == 0 &&
1340               signal_pass_state (signo) == 1)
1341             {
1342               prdelset (&pi.prrun.pr_trace, signo);
1343             }
1344           else
1345             {
1346               praddset (&pi.prrun.pr_trace, signo);
1347             }
1348         }
1349       if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace))
1350         {
1351           print_sys_errmsg ("PIOCSTRACE failed", errno);
1352         }
1353     }
1354 }
1355
1356 /*
1357
1358 GLOBAL FUNCTION
1359
1360         proc_set_exec_trap -- arrange for exec'd child to halt at startup
1361
1362 SYNOPSIS
1363
1364         void proc_set_exec_trap (void)
1365
1366 DESCRIPTION
1367
1368         This function is called in the child process when starting up
1369         an inferior, prior to doing the exec of the actual inferior.
1370         It sets the child process's exitset to make exit from the exec
1371         system call an event of interest to stop on, and then simply
1372         returns.  The child does the exec, the system call returns, and
1373         the child stops at the first instruction, ready for the gdb
1374         parent process to take control of it.
1375
1376 NOTE
1377
1378         We need to use all local variables since the child may be sharing
1379         it's data space with the parent, if vfork was used rather than
1380         fork.
1381
1382         Also note that we want to turn off the inherit-on-fork flag in
1383         the child process so that any grand-children start with all
1384         tracing flags cleared.
1385  */
1386
1387 void
1388 proc_set_exec_trap ()
1389 {
1390   sysset_t exitset;
1391   auto char procname[32];
1392   int fd;
1393
1394   (void) sprintf (procname, PROC_NAME_FMT, getpid ());
1395   if ((fd = open (procname, O_RDWR)) < 0)
1396     {
1397       perror (procname);
1398       fflush (stderr);
1399       _exit (127);
1400     }
1401   premptyset (&exitset);
1402
1403   /* GW: Rationale...
1404      Not all systems with /proc have all the exec* syscalls with the same
1405      names.  On the SGI, for example, there is no SYS_exec, but there
1406      *is* a SYS_execv.  So, we try to account for that. */
1407
1408 #ifdef SYS_exec
1409   praddset (&exitset, SYS_exec);
1410 #endif
1411 #ifdef SYS_execve
1412   praddset (&exitset, SYS_execve);
1413 #endif
1414 #ifdef SYS_execv
1415   praddset(&exitset, SYS_execv);
1416 #endif
1417
1418   if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
1419     {
1420       perror (procname);
1421       fflush (stderr);
1422       _exit (127);
1423     }
1424
1425   /* Turn off inherit-on-fork flag so that all grand-children of gdb
1426      start with tracing flags cleared. */
1427
1428 #if defined (PIOCRESET) /* New method */
1429   {
1430       long pr_flags;
1431       pr_flags = PR_FORK;
1432       (void) ioctl (fd, PIOCRESET, &pr_flags);
1433   }
1434 #else
1435 #if defined (PIOCRFORK) /* Original method */
1436   (void) ioctl (fd, PIOCRFORK, NULL);
1437 #endif
1438 #endif
1439 }
1440
1441 /*
1442
1443 GLOBAL FUNCTION
1444
1445         proc_iterate_over_mappings -- call function for every mapped space
1446
1447 SYNOPSIS
1448
1449         int proc_iterate_over_mappings (int (*func)())
1450
1451 DESCRIPTION
1452
1453         Given a pointer to a function, call that function for every
1454         mapped address space, passing it an open file descriptor for
1455         the file corresponding to that mapped address space (if any)
1456         and the base address of the mapped space.  Quit when we hit
1457         the end of the mappings or the function returns nonzero.
1458  */
1459
1460 int
1461 proc_iterate_over_mappings (func)
1462      int (*func) PARAMS ((int, CORE_ADDR));
1463 {
1464   int nmap;
1465   int fd;
1466   int funcstat = 0;
1467   struct prmap *prmaps;
1468   struct prmap *prmap;
1469
1470   if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
1471     {
1472       prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1473       if (ioctl (pi.fd, PIOCMAP, prmaps) == 0)
1474         {
1475           for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
1476             {
1477               fd = proc_address_to_fd ((CORE_ADDR) prmap -> pr_vaddr, 0);
1478               funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
1479               close (fd);
1480             }
1481         }
1482     }
1483   return (funcstat);
1484 }
1485
1486 /*
1487
1488 GLOBAL FUNCTION
1489
1490         proc_base_address -- find base address for segment containing address
1491
1492 SYNOPSIS
1493
1494         CORE_ADDR proc_base_address (CORE_ADDR addr)
1495
1496 DESCRIPTION
1497
1498         Given an address of a location in the inferior, find and return
1499         the base address of the mapped segment containing that address.
1500
1501         This is used for example, by the shared library support code,
1502         where we have the pc value for some location in the shared library
1503         where we are stopped, and need to know the base address of the
1504         segment containing that address.
1505 */
1506
1507
1508 #if 0   /* Currently unused */
1509
1510 CORE_ADDR
1511 proc_base_address (addr)
1512      CORE_ADDR addr;
1513 {
1514   int nmap;
1515   struct prmap *prmaps;
1516   struct prmap *prmap;
1517   CORE_ADDR baseaddr = 0;
1518
1519   if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
1520     {
1521       prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1522       if (ioctl (pi.fd, PIOCMAP, prmaps) == 0)
1523         {
1524           for (prmap = prmaps; prmap -> pr_size; ++prmap)
1525             {
1526               if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
1527                   (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
1528                 {
1529                   baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
1530                   break;
1531                 }
1532             }
1533         }
1534     }
1535   return (baseaddr);
1536 }
1537
1538 #endif  /* 0 */
1539
1540 /*
1541
1542 LOCAL FUNCTION
1543
1544         proc_address_to_fd -- return open fd for file mapped to address
1545
1546 SYNOPSIS
1547
1548         int proc_address_to_fd (CORE_ADDR addr, complain)
1549
1550 DESCRIPTION
1551
1552         Given an address in the current inferior's address space, use the
1553         /proc interface to find an open file descriptor for the file that
1554         this address was mapped in from.  Return -1 if there is no current
1555         inferior.  Print a warning message if there is an inferior but
1556         the address corresponds to no file (IE a bogus address).
1557
1558 */
1559
1560 static int
1561 proc_address_to_fd (addr, complain)
1562      CORE_ADDR addr;
1563      int complain;
1564 {
1565   int fd = -1;
1566
1567   if (pi.valid)
1568     {
1569       if ((fd = ioctl (pi.fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
1570         {
1571           if (complain)
1572             {
1573               print_sys_errmsg (pi.pathname, errno);
1574               warning ("can't find mapped file for address 0x%x", addr);
1575             }
1576         }
1577     }
1578   return (fd);
1579 }
1580
1581
1582 #ifdef ATTACH_DETACH
1583
1584 /*
1585
1586 GLOBAL FUNCTION
1587
1588         attach -- attach to an already existing process
1589
1590 SYNOPSIS
1591
1592         int attach (int pid)
1593
1594 DESCRIPTION
1595
1596         Attach to an already existing process with the specified process
1597         id.  If the process is not already stopped, query whether to
1598         stop it or not.
1599
1600 NOTES
1601
1602         The option of stopping at attach time is specific to the /proc
1603         versions of gdb.  Versions using ptrace force the attachee
1604         to stop.
1605
1606 */
1607
1608 int
1609 attach (pid)
1610      int pid;
1611 {
1612   if (!open_proc_file (pid, &pi))
1613     {
1614       perror_with_name (pi.pathname);
1615       /* NOTREACHED */
1616     }
1617
1618   /*  Get current status of process and if it is not already stopped,
1619       then stop it.  Remember whether or not it was stopped when we first
1620       examined it. */
1621
1622   if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
1623     {
1624       print_sys_errmsg (pi.pathname, errno);
1625       close_proc_file (&pi);
1626       error ("PIOCSTATUS failed");
1627     }
1628   if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
1629     {
1630       pi.was_stopped = 1;
1631     }
1632   else
1633     {
1634       pi.was_stopped = 0;
1635       if (query ("Process is currently running, stop it? "))
1636         {
1637           if (ioctl (pi.fd, PIOCSTOP, &pi.prstatus) < 0)
1638             {
1639               print_sys_errmsg (pi.pathname, errno);
1640               close_proc_file (&pi);
1641               error ("PIOCSTOP failed");
1642             }
1643           pi.nopass_next_sigstop = 1;
1644         }
1645       else
1646         {
1647           printf ("Ok, gdb will wait for process %u to stop.\n", pid);
1648         }
1649     }
1650
1651   /*  Remember some things about the inferior that we will, or might, change
1652       so that we can restore them when we detach. */
1653
1654   (void) ioctl (pi.fd, PIOCGTRACE, &pi.saved_trace);
1655   (void) ioctl (pi.fd, PIOCGHOLD, &pi.saved_sighold);
1656   (void) ioctl (pi.fd, PIOCGFAULT, &pi.saved_fltset);
1657   (void) ioctl (pi.fd, PIOCGENTRY, &pi.saved_entryset);
1658   (void) ioctl (pi.fd, PIOCGEXIT, &pi.saved_exitset);
1659
1660   /* Set up trace and fault sets, as gdb expects them. */
1661
1662   (void) memset (&pi.prrun, 0, sizeof (pi.prrun));
1663   prfillset (&pi.prrun.pr_trace);
1664   proc_signal_handling_change ();
1665   prfillset (&pi.prrun.pr_fault);
1666   prdelset (&pi.prrun.pr_fault, FLTPAGE);
1667   if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault))
1668     {
1669       print_sys_errmsg ("PIOCSFAULT failed", errno);
1670     }
1671   if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace))
1672     {
1673       print_sys_errmsg ("PIOCSTRACE failed", errno);
1674     }
1675   attach_flag = 1;
1676   return (pid);
1677 }
1678
1679 /*
1680
1681 GLOBAL FUNCTION
1682
1683         detach -- detach from an attached-to process
1684
1685 SYNOPSIS
1686
1687         void detach (int signal)
1688
1689 DESCRIPTION
1690
1691         Detach from the current attachee.
1692
1693         If signal is non-zero, the attachee is started running again and sent
1694         the specified signal.
1695
1696         If signal is zero and the attachee was not already stopped when we
1697         attached to it, then we make it runnable again when we detach.
1698
1699         Otherwise, we query whether or not to make the attachee runnable
1700         again, since we may simply want to leave it in the state it was in
1701         when we attached.
1702
1703         We report any problems, but do not consider them errors, since we
1704         MUST detach even if some things don't seem to go right.  This may not
1705         be the ideal situation.  (FIXME).
1706  */
1707
1708 void
1709 detach (signal)
1710      int signal;
1711 {
1712   if (signal)
1713     {
1714       set_proc_siginfo (&pi, signal);
1715     }
1716   if (ioctl (pi.fd, PIOCSEXIT, &pi.saved_exitset) < 0)
1717     {
1718       print_sys_errmsg (pi.pathname, errno);
1719       printf ("PIOCSEXIT failed.\n");
1720     }
1721   if (ioctl (pi.fd, PIOCSENTRY, &pi.saved_entryset) < 0)
1722     {
1723       print_sys_errmsg (pi.pathname, errno);
1724       printf ("PIOCSENTRY failed.\n");
1725     }
1726   if (ioctl (pi.fd, PIOCSTRACE, &pi.saved_trace) < 0)
1727     {
1728       print_sys_errmsg (pi.pathname, errno);
1729       printf ("PIOCSTRACE failed.\n");
1730     }
1731   if (ioctl (pi.fd, PIOCSHOLD, &pi.saved_sighold) < 0)
1732     {
1733       print_sys_errmsg (pi.pathname, errno);
1734       printf ("PIOSCHOLD failed.\n");
1735     }
1736   if (ioctl (pi.fd, PIOCSFAULT, &pi.saved_fltset) < 0)
1737     {
1738       print_sys_errmsg (pi.pathname, errno);
1739       printf ("PIOCSFAULT failed.\n");
1740     }
1741   if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
1742     {
1743       print_sys_errmsg (pi.pathname, errno);
1744       printf ("PIOCSTATUS failed.\n");
1745     }
1746   else
1747     {
1748       if (signal || (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
1749         {
1750           if (signal || !pi.was_stopped ||
1751               query ("Was stopped when attached, make it runnable again? "))
1752             {
1753               (void) memset (&pi.prrun, 0, sizeof (pi.prrun));
1754               pi.prrun.pr_flags = PRCFAULT;
1755               if (ioctl (pi.fd, PIOCRUN, &pi.prrun))
1756                 {
1757                   print_sys_errmsg (pi.pathname, errno);
1758                   printf ("PIOCRUN failed.\n");
1759                 }
1760             }
1761         }
1762     }
1763   close_proc_file (&pi);
1764   attach_flag = 0;
1765 }
1766
1767 #endif  /* ATTACH_DETACH */
1768
1769 /*
1770
1771 GLOBAL FUNCTION
1772
1773         proc_wait -- emulate wait() as much as possible
1774
1775 SYNOPSIS
1776
1777         int proc_wait (int *statloc)
1778
1779 DESCRIPTION
1780
1781         Try to emulate wait() as much as possible.  Not sure why we can't
1782         just use wait(), but it seems to have problems when applied to a
1783         process being controlled with the /proc interface.
1784
1785 NOTES
1786
1787         We have a race problem here with no obvious solution.  We need to let
1788         the inferior run until it stops on an event of interest, which means
1789         that we need to use the PIOCWSTOP ioctl.  However, we cannot use this
1790         ioctl if the process is already stopped on something that is not an
1791         event of interest, or the call will hang indefinitely.  Thus we first
1792         use PIOCSTATUS to see if the process is not stopped.  If not, then we
1793         use PIOCWSTOP.  But during the window between the two, if the process
1794         stops for any reason that is not an event of interest (such as a job
1795         control signal) then gdb will hang.  One possible workaround is to set
1796         an alarm to wake up every minute of so and check to see if the process
1797         is still running, and if so, then reissue the PIOCWSTOP.  But this is
1798         a real kludge, so has not been implemented.  FIXME: investigate
1799         alternatives.
1800
1801         FIXME:  Investigate why wait() seems to have problems with programs
1802         being control by /proc routines.
1803
1804  */
1805
1806 int
1807 proc_wait (statloc)
1808      int *statloc;
1809 {
1810   short what;
1811   short why;
1812   int statval = 0;
1813   int checkerr = 0;
1814   int rtnval = -1;
1815
1816   if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
1817     {
1818       checkerr++;
1819     }
1820   else if (!(pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
1821     {
1822       if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
1823         {
1824           checkerr++;
1825         }
1826     }
1827   if (checkerr)
1828     {
1829       if (errno == ENOENT)
1830         {
1831           rtnval = wait (&statval);
1832           if (rtnval != inferior_pid)
1833             {
1834               error ("PIOCWSTOP, wait failed, returned %d", rtnval);
1835               /* NOTREACHED */
1836             }
1837         }
1838       else
1839         {
1840           print_sys_errmsg (pi.pathname, errno);
1841           error ("PIOCSTATUS or PIOCWSTOP failed.");
1842           /* NOTREACHED */
1843         }
1844     }
1845   else if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
1846     {
1847       rtnval = pi.prstatus.pr_pid;
1848       why = pi.prstatus.pr_why;
1849       what = pi.prstatus.pr_what;
1850       if (why == PR_SIGNALLED)
1851         {
1852           statval = (what << 8) | 0177;
1853         }
1854       else if ((why == PR_SYSEXIT)
1855                &&
1856                (
1857 #ifdef SYS_exec
1858                 what == SYS_exec
1859 #else
1860                 0 == 0
1861 #endif
1862 #ifdef SYS_execve
1863                 || what == SYS_execve
1864 #endif
1865 #ifdef SYS_execv
1866                 || what == SYS_execv
1867 #endif
1868                 ))
1869         {
1870           statval = (SIGTRAP << 8) | 0177;
1871         }
1872       else if (why == PR_REQUESTED)
1873         {
1874           statval = (SIGSTOP << 8) | 0177;
1875         }
1876       else if (why == PR_JOBCONTROL)
1877         {
1878           statval = (what << 8) | 0177;
1879         }
1880       else if (why == PR_FAULTED)
1881         {
1882           switch (what)
1883             {
1884             case FLTPRIV:
1885             case FLTILL:
1886               statval = (SIGILL << 8) | 0177;
1887               break;
1888             case FLTBPT:
1889             case FLTTRACE:
1890               statval = (SIGTRAP << 8) | 0177;
1891               break;
1892             case FLTSTACK:
1893             case FLTACCESS:
1894             case FLTBOUNDS:
1895               statval = (SIGSEGV << 8) | 0177;
1896               break;
1897             case FLTIOVF:
1898             case FLTIZDIV:
1899             case FLTFPE:
1900               statval = (SIGFPE << 8) | 0177;
1901               break;
1902             case FLTPAGE:               /* Recoverable page fault */
1903             default:
1904               rtnval = -1;
1905               error ("PIOCWSTOP, unknown why %d, what %d", why, what);
1906               /* NOTREACHED */
1907             }
1908         }
1909       else
1910         {
1911           rtnval = -1;
1912           error ("PIOCWSTOP, unknown why %d, what %d", why, what);
1913           /* NOTREACHED */
1914         }
1915     }
1916   else
1917     {
1918       error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
1919              pi.prstatus.pr_flags);
1920           /* NOTREACHED */
1921     }
1922   if (statloc)
1923     {
1924       *statloc = statval;
1925     }
1926   return (rtnval);
1927 }
1928
1929 /*
1930
1931 LOCAL FUNCTION
1932
1933         set_proc_siginfo - set a process's current signal info
1934
1935 SYNOPSIS
1936
1937         void set_proc_siginfo (struct procinfo *pip, int signo);
1938
1939 DESCRIPTION
1940
1941         Given a pointer to a process info struct in PIP and a signal number
1942         in SIGNO, set the process's current signal and its associated signal
1943         information.  The signal will be delivered to the process immediately
1944         after execution is resumed, even if it is being held.  In addition,
1945         this particular delivery will not cause another PR_SIGNALLED stop
1946         even if the signal is being traced.
1947
1948         If we are not delivering the same signal that the prstatus siginfo
1949         struct contains information about, then synthesize a siginfo struct
1950         to match the signal we are doing to deliver, make it of the type
1951         "generated by a user process", and send this synthesized copy.  When
1952         used to set the inferior's signal state, this will be required if we
1953         are not currently stopped because of a traced signal, or if we decide
1954         to continue with a different signal.
1955
1956         Note that when continuing the inferior from a stop due to receipt
1957         of a traced signal, we either have set PRCSIG to clear the existing
1958         signal, or we have to call this function to do a PIOCSSIG with either
1959         the existing siginfo struct from pr_info, or one we have synthesized
1960         appropriately for the signal we want to deliver.  Otherwise if the
1961         signal is still being traced, the inferior will immediately stop
1962         again.
1963
1964         See siginfo(5) for more details.
1965 */
1966
1967 static void
1968 set_proc_siginfo (pip, signo)
1969      struct procinfo *pip;
1970      int signo;
1971 {
1972   struct siginfo newsiginfo;
1973   struct siginfo *sip;
1974
1975   if (pip -> valid)
1976     {
1977       if (signo == pip -> prstatus.pr_info.si_signo)
1978         {
1979           sip = &pip -> prstatus.pr_info;
1980         }
1981       else
1982         {
1983           (void) memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
1984           sip = &newsiginfo;
1985           sip -> si_signo = signo;
1986           sip -> si_code = 0;
1987           sip -> si_errno = 0;
1988           sip -> si_pid = getpid ();
1989           sip -> si_uid = getuid ();
1990         }
1991       if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
1992         {
1993           print_sys_errmsg (pip -> pathname, errno);
1994           warning ("PIOCSSIG failed");
1995         }
1996     }
1997 }
1998
1999 /*
2000
2001 GLOBAL FUNCTION
2002
2003         child_resume -- resume execution of the inferior process
2004
2005 SYNOPSIS
2006
2007         void child_resume (int step, int signo)
2008
2009 DESCRIPTION
2010
2011         Resume execution of the inferior process.  If STEP is nozero, then
2012         just single step it.  If SIGNAL is nonzero, restart it with that
2013         signal activated.
2014
2015 NOTE
2016
2017         It may not be absolutely necessary to specify the PC value for
2018         restarting, but to be safe we use the value that gdb considers
2019         to be current.  One case where this might be necessary is if the
2020         user explicitly changes the PC value that gdb considers to be
2021         current.  FIXME:  Investigate if this is necessary or not.
2022
2023         When attaching to a child process, if we forced it to stop with
2024         a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
2025         Upon resuming the first time after such a stop, we explicitly
2026         inhibit sending it another SIGSTOP, which would be the normal
2027         result of default signal handling.  One potential drawback to
2028         this is that we will also ignore any attempt to by the user
2029         to explicitly continue after the attach with a SIGSTOP.  Ultimately
2030         this problem should be dealt with by making the routines that
2031         deal with the inferior a little smarter, and possibly even allow
2032         an inferior to continue running at the same time as gdb.  (FIXME?)
2033  */
2034
2035 void
2036 child_resume (step, signo)
2037      int step;
2038      int signo;
2039 {
2040   errno = 0;
2041   pi.prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
2042
2043 #ifdef PRSVADDR_BROKEN
2044 /* Can't do this under Solaris running on a Sparc, as there seems to be no
2045    place to put nPC.  In fact, if you use this, nPC seems to be set to some
2046    random garbage.  We have to rely on the fact that PC and nPC have been
2047    written previously via PIOCSREG during a register flush. */
2048
2049   pi.prrun.pr_vaddr = (caddr_t) *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];
2050   pi.prrun.pr_flags != PRSVADDR;
2051 #endif
2052
2053   if (signo && !(signo == SIGSTOP && pi.nopass_next_sigstop))
2054     {
2055       set_proc_siginfo (&pi, signo);
2056     }
2057   else
2058     {
2059       pi.prrun.pr_flags |= PRCSIG;
2060     }
2061   pi.nopass_next_sigstop = 0;
2062   if (step)
2063     {
2064       pi.prrun.pr_flags |= PRSTEP;
2065     }
2066   if (ioctl (pi.fd, PIOCRUN, &pi.prrun) != 0)
2067     {
2068       perror_with_name (pi.pathname);
2069       /* NOTREACHED */
2070     }
2071 }
2072
2073 /*
2074
2075 GLOBAL FUNCTION
2076
2077         fetch_inferior_registers -- fetch current registers from inferior
2078
2079 SYNOPSIS
2080
2081         void fetch_inferior_registers (int regno)
2082
2083 DESCRIPTION
2084
2085         Read the current values of the inferior's registers, both the
2086         general register set and floating point registers (if supported)
2087         and update gdb's idea of their current values.
2088
2089 */
2090
2091 void
2092 fetch_inferior_registers (regno)
2093      int regno;
2094 {
2095   if (ioctl (pi.fd, PIOCGREG, &pi.gregset) != -1)
2096     {
2097       supply_gregset (&pi.gregset);
2098     }
2099 #if defined (FP0_REGNUM)
2100   if (ioctl (pi.fd, PIOCGFPREG, &pi.fpregset) != -1)
2101     {
2102       supply_fpregset (&pi.fpregset);
2103     }
2104 #endif
2105 }
2106
2107 /*
2108
2109 GLOBAL FUNCTION
2110
2111         fetch_core_registers -- fetch current registers from core file data
2112
2113 SYNOPSIS
2114
2115         void fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
2116                                    int which, unsigned in reg_addr)
2117
2118 DESCRIPTION
2119
2120         Read the values of either the general register set (WHICH equals 0)
2121         or the floating point register set (WHICH equals 2) from the core
2122         file data (pointed to by CORE_REG_SECT), and update gdb's idea of
2123         their current values.  The CORE_REG_SIZE parameter is ignored.
2124
2125 NOTES
2126
2127         Use the indicated sizes to validate the gregset and fpregset
2128         structures.
2129 */
2130
2131 void
2132 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
2133      char *core_reg_sect;
2134      unsigned core_reg_size;
2135      int which;
2136      unsigned int reg_addr;     /* Unused in this version */
2137 {
2138
2139   if (which == 0)
2140     {
2141       if (core_reg_size != sizeof (pi.gregset))
2142         {
2143           warning ("wrong size gregset struct in core file");
2144         }
2145       else
2146         {
2147           (void) memcpy ((char *) &pi.gregset, core_reg_sect,
2148                          sizeof (pi.gregset));
2149           supply_gregset (&pi.gregset);
2150         }
2151     }
2152   else if (which == 2)
2153     {
2154       if (core_reg_size != sizeof (pi.fpregset))
2155         {
2156           warning ("wrong size fpregset struct in core file");
2157         }
2158       else
2159         {
2160           (void) memcpy ((char *) &pi.fpregset, core_reg_sect,
2161                          sizeof (pi.fpregset));
2162 #if defined (FP0_REGNUM)
2163           supply_fpregset (&pi.fpregset);
2164 #endif
2165         }
2166     }
2167 }
2168
2169 /*
2170
2171 LOCAL FUNCTION
2172
2173         proc_init_failed - called whenever /proc access initialization fails
2174
2175 SYNOPSIS
2176
2177         static void proc_init_failed (char *why)
2178
2179 DESCRIPTION
2180
2181         This function is called whenever initialization of access to a /proc
2182         entry fails.  It prints a suitable error message, does some cleanup,
2183         and then invokes the standard error processing routine which dumps
2184         us back into the command loop.
2185  */
2186
2187 static void
2188 proc_init_failed (why)
2189      char *why;
2190 {
2191   print_sys_errmsg (pi.pathname, errno);
2192   (void) kill (pi.pid, SIGKILL);
2193   close_proc_file (&pi);
2194   error (why);
2195   /* NOTREACHED */
2196 }
2197
2198 /*
2199
2200 LOCAL FUNCTION
2201
2202         close_proc_file - close any currently open /proc entry
2203
2204 SYNOPSIS
2205
2206         static void close_proc_file (struct procinfo *pip)
2207
2208 DESCRIPTION
2209
2210         Close any currently open /proc entry and mark the process information
2211         entry as invalid.  In order to ensure that we don't try to reuse any
2212         stale information, the pid, fd, and pathnames are explicitly
2213         invalidated, which may be overkill.
2214
2215  */
2216
2217 static void
2218 close_proc_file (pip)
2219      struct procinfo *pip;
2220 {
2221   pip -> pid = 0;
2222   if (pip -> valid)
2223     {
2224       (void) close (pip -> fd);
2225     }
2226   pip -> fd = -1;
2227   if (pip -> pathname)
2228     {
2229       free (pip -> pathname);
2230       pip -> pathname = NULL;
2231     }
2232   pip -> valid = 0;
2233 }
2234
2235 /*
2236
2237 LOCAL FUNCTION
2238
2239         open_proc_file - open a /proc entry for a given process id
2240
2241 SYNOPSIS
2242
2243         static int open_proc_file (pid, struct procinfo *pip)
2244
2245 DESCRIPTION
2246
2247         Given a process id, close the existing open /proc entry (if any)
2248         and open one for the new process id.  Once it is open, then
2249         mark the local process information structure as valid, which
2250         guarantees that the pid, fd, and pathname fields match an open
2251         /proc entry.  Returns zero if the open fails, nonzero otherwise.
2252
2253         Note that the pathname is left intact, even when the open fails,
2254         so that callers can use it to construct meaningful error messages
2255         rather than just "file open failed".
2256  */
2257
2258 static int
2259 open_proc_file (pid, pip)
2260      int pid;
2261      struct procinfo *pip;
2262 {
2263   pip -> valid = 0;
2264   if (pip -> valid)
2265     {
2266       (void) close (pip -> fd);
2267     }
2268   if (pip -> pathname == NULL)
2269     {
2270       pip -> pathname = xmalloc (32);
2271     }
2272   sprintf (pip -> pathname, PROC_NAME_FMT, pid);
2273   if ((pip -> fd = open (pip -> pathname, O_RDWR)) >= 0)
2274     {
2275       pip -> valid = 1;
2276       pip -> pid = pid;
2277     }
2278   return (pip -> valid);
2279 }
2280
2281 static char *
2282 mappingflags (flags)
2283      long flags;
2284 {
2285   static char asciiflags[8];
2286
2287   strcpy (asciiflags, "-------");
2288 #if defined (MA_PHYS)
2289   if (flags & MA_PHYS)   asciiflags[0] = 'd';
2290 #endif
2291   if (flags & MA_STACK)  asciiflags[1] = 's';
2292   if (flags & MA_BREAK)  asciiflags[2] = 'b';
2293   if (flags & MA_SHARED) asciiflags[3] = 's';
2294   if (flags & MA_READ)   asciiflags[4] = 'r';
2295   if (flags & MA_WRITE)  asciiflags[5] = 'w';
2296   if (flags & MA_EXEC)   asciiflags[6] = 'x';
2297   return (asciiflags);
2298 }
2299
2300 static void
2301 info_proc_flags (pip, summary)
2302      struct procinfo *pip;
2303      int summary;
2304 {
2305   struct trans *transp;
2306
2307   printf_filtered ("%-32s", "Process status flags:");
2308   if (!summary)
2309     {
2310       printf_filtered ("\n\n");
2311     }
2312   for (transp = pr_flag_table; transp -> name != NULL; transp++)
2313     {
2314       if (pip -> prstatus.pr_flags & transp -> value)
2315         {
2316           if (summary)
2317             {
2318               printf_filtered ("%s ", transp -> name);
2319             }
2320           else
2321             {
2322               printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
2323             }
2324         }
2325     }
2326   printf_filtered ("\n");
2327 }
2328
2329 static void
2330 info_proc_stop (pip, summary)
2331      struct procinfo *pip;
2332      int summary;
2333 {
2334   struct trans *transp;
2335   int why;
2336   int what;
2337
2338   why = pip -> prstatus.pr_why;
2339   what = pip -> prstatus.pr_what;
2340
2341   if (pip -> prstatus.pr_flags & PR_STOPPED)
2342     {
2343       printf_filtered ("%-32s", "Reason for stopping:");
2344       if (!summary)
2345         {
2346           printf_filtered ("\n\n");
2347         }
2348       for (transp = pr_why_table; transp -> name != NULL; transp++)
2349         {
2350           if (why == transp -> value)
2351             {
2352               if (summary)
2353                 {
2354                   printf_filtered ("%s ", transp -> name);
2355                 }
2356               else
2357                 {
2358                   printf_filtered ("\t%-16s %s.\n",
2359                                    transp -> name, transp -> desc);
2360                 }
2361               break;
2362             }
2363         }
2364
2365       /* Use the pr_why field to determine what the pr_what field means, and
2366          print more information. */
2367
2368       switch (why)
2369         {
2370           case PR_REQUESTED:
2371             /* pr_what is unused for this case */
2372             break;
2373           case PR_JOBCONTROL:
2374           case PR_SIGNALLED:
2375             if (summary)
2376               {
2377                 printf_filtered ("%s ", signalname (what));
2378               }
2379             else
2380               {
2381                 printf_filtered ("\t%-16s %s.\n", signalname (what),
2382                                  safe_strsignal (what));
2383               }
2384             break;
2385           case PR_SYSENTRY:
2386             if (summary)
2387               {
2388                 printf_filtered ("%s ", syscallname (what));
2389               }
2390             else
2391               {
2392                 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2393                                  "Entered this system call");
2394               }
2395             break;
2396           case PR_SYSEXIT:
2397             if (summary)
2398               {
2399                 printf_filtered ("%s ", syscallname (what));
2400               }
2401             else
2402               {
2403                 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2404                                  "Returned from this system call");
2405               }
2406             break;
2407           case PR_FAULTED:
2408             if (summary)
2409               {
2410                 printf_filtered ("%s ",
2411                                  lookupname (faults_table, what, "fault"));
2412               }
2413             else
2414               {
2415                 printf_filtered ("\t%-16s %s.\n",
2416                                  lookupname (faults_table, what, "fault"),
2417                                  lookupdesc (faults_table, what));
2418               }
2419             break;
2420           }
2421       printf_filtered ("\n");
2422     }
2423 }
2424
2425 static void
2426 info_proc_siginfo (pip, summary)
2427      struct procinfo *pip;
2428      int summary;
2429 {
2430   struct siginfo *sip;
2431
2432   if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
2433       (pip -> prstatus.pr_why == PR_SIGNALLED ||
2434        pip -> prstatus.pr_why == PR_FAULTED))
2435     {
2436       printf_filtered ("%-32s", "Additional signal/fault info:");
2437       sip = &pip -> prstatus.pr_info;
2438       if (summary)
2439         {
2440           printf_filtered ("%s ", signalname (sip -> si_signo));
2441           if (sip -> si_errno > 0)
2442             {
2443               printf_filtered ("%s ", errnoname (sip -> si_errno));
2444             }
2445           if (sip -> si_code <= 0)
2446             {
2447               printf_filtered ("sent by pid %d, uid %d ", sip -> si_pid,
2448                                sip -> si_uid);
2449             }
2450           else
2451             {
2452               printf_filtered ("%s ", sigcodename (sip));
2453               if ((sip -> si_signo == SIGILL) ||
2454                   (sip -> si_signo == SIGFPE) ||
2455                   (sip -> si_signo == SIGSEGV) ||
2456                   (sip -> si_signo == SIGBUS))
2457                 {
2458                   printf_filtered ("addr=%#x ", sip -> si_addr);
2459                 }
2460               else if ((sip -> si_signo == SIGCHLD))
2461                 {
2462                   printf_filtered ("child pid %u, status %u ",
2463                                    sip -> si_pid,
2464                                    sip -> si_status);
2465                 }
2466               else if ((sip -> si_signo == SIGPOLL))
2467                 {
2468                   printf_filtered ("band %u ", sip -> si_band);
2469                 }
2470             }
2471         }
2472       else
2473         {
2474           printf_filtered ("\n\n");
2475           printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
2476                            safe_strsignal (sip -> si_signo));
2477           if (sip -> si_errno > 0)
2478             {
2479               printf_filtered ("\t%-16s %s.\n",
2480                                errnoname (sip -> si_errno),
2481                                safe_strerror (sip -> si_errno));
2482             }
2483           if (sip -> si_code <= 0)
2484             {
2485               printf_filtered ("\t%-16u %s\n", sip -> si_pid,
2486                                "PID of process sending signal");
2487               printf_filtered ("\t%-16u %s\n", sip -> si_uid,
2488                                "UID of process sending signal");
2489             }
2490           else
2491             {
2492               printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
2493                                sigcodedesc (sip));
2494               if ((sip -> si_signo == SIGILL) ||
2495                   (sip -> si_signo == SIGFPE))
2496                 {
2497                   printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2498                                    "Address of faulting instruction");
2499                 }
2500               else if ((sip -> si_signo == SIGSEGV) ||
2501                        (sip -> si_signo == SIGBUS))
2502                 {
2503                   printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2504                                    "Address of faulting memory reference");
2505                 }
2506               else if ((sip -> si_signo == SIGCHLD))
2507                 {
2508                   printf_filtered ("\t%-16u %s.\n", sip -> si_pid,
2509                                    "Child process ID");
2510                   printf_filtered ("\t%-16u %s.\n", sip -> si_status,
2511                                    "Child process exit value or signal");
2512                 }
2513               else if ((sip -> si_signo == SIGPOLL))
2514                 {
2515                   printf_filtered ("\t%-16u %s.\n", sip -> si_band,
2516                                    "Band event for POLL_{IN,OUT,MSG}");
2517                 }
2518             }
2519         }
2520       printf_filtered ("\n");
2521     }
2522 }
2523
2524 static void
2525 info_proc_syscalls (pip, summary)
2526      struct procinfo *pip;
2527      int summary;
2528 {
2529   int syscallnum;
2530
2531   if (!summary)
2532     {
2533
2534 #if 0   /* FIXME:  Needs to use gdb-wide configured info about system calls. */
2535       if (pip -> prstatus.pr_flags & PR_ASLEEP)
2536         {
2537           int syscallnum = pip -> prstatus.pr_reg[R_D0];
2538           if (summary)
2539             {
2540               printf_filtered ("%-32s", "Sleeping in system call:");
2541               printf_filtered ("%s", syscallname (syscallnum));
2542             }
2543           else
2544             {
2545               printf_filtered ("Sleeping in system call '%s'.\n",
2546                                syscallname (syscallnum));
2547             }
2548         }
2549 #endif
2550
2551       if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
2552         {
2553           print_sys_errmsg (pip -> pathname, errno);
2554           error ("PIOCGENTRY failed");
2555         }
2556
2557       if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
2558         {
2559           print_sys_errmsg (pip -> pathname, errno);
2560           error ("PIOCGEXIT failed");
2561         }
2562
2563       printf_filtered ("System call tracing information:\n\n");
2564
2565       printf_filtered ("\t%-12s %-8s %-8s\n",
2566                        "System call",
2567                        "Entry",
2568                        "Exit");
2569       for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
2570         {
2571           QUIT;
2572           if (syscall_table[syscallnum] != NULL)
2573             {
2574               printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
2575               printf_filtered ("%-8s ",
2576                                prismember (&pip -> entryset, syscallnum)
2577                                ? "on" : "off");
2578               printf_filtered ("%-8s ",
2579                                prismember (&pip -> exitset, syscallnum)
2580                                ? "on" : "off");
2581               printf_filtered ("\n");
2582             }
2583           }
2584       printf_filtered ("\n");
2585     }
2586 }
2587
2588 static char *
2589 signalname (signo)
2590      int signo;
2591 {
2592   char *name;
2593   static char locbuf[32];
2594
2595   name = strsigno (signo);
2596   if (name == NULL)
2597     {
2598       sprintf (locbuf, "Signal %d", signo);
2599     }
2600   else
2601     {
2602       sprintf (locbuf, "%s (%d)", name, signo);
2603     }
2604   return (locbuf);
2605 }
2606
2607 static char *
2608 errnoname (errnum)
2609      int errnum;
2610 {
2611   char *name;
2612   static char locbuf[32];
2613
2614   name = strerrno (errnum);
2615   if (name == NULL)
2616     {
2617       sprintf (locbuf, "Errno %d", errnum);
2618     }
2619   else
2620     {
2621       sprintf (locbuf, "%s (%d)", name, errnum);
2622     }
2623   return (locbuf);
2624 }
2625
2626 static void
2627 info_proc_signals (pip, summary)
2628      struct procinfo *pip;
2629      int summary;
2630 {
2631   int signo;
2632
2633   if (!summary)
2634     {
2635       if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
2636         {
2637           print_sys_errmsg (pip -> pathname, errno);
2638           error ("PIOCGTRACE failed");
2639         }
2640
2641       printf_filtered ("Disposition of signals:\n\n");
2642       printf_filtered ("\t%-15s %-8s %-8s %-8s  %s\n\n",
2643                        "Signal", "Trace", "Hold", "Pending", "Description");
2644       for (signo = 0; signo < NSIG; signo++)
2645         {
2646           QUIT;
2647           printf_filtered ("\t%-15s ", signalname (signo));
2648           printf_filtered ("%-8s ",
2649                            prismember (&pip -> trace, signo)
2650                            ? "on" : "off");
2651           printf_filtered ("%-8s ",
2652                            prismember (&pip -> prstatus.pr_sighold, signo)
2653                            ? "on" : "off");
2654           printf_filtered ("%-8s ",
2655                            prismember (&pip -> prstatus.pr_sigpend, signo)
2656                            ? "yes" : "no");
2657           printf_filtered (" %s\n", safe_strsignal (signo));
2658         }
2659       printf_filtered ("\n");
2660     }
2661 }
2662
2663 static void
2664 info_proc_faults (pip, summary)
2665      struct procinfo *pip;
2666      int summary;
2667 {
2668   struct trans *transp;
2669
2670   if (!summary)
2671     {
2672       if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
2673         {
2674           print_sys_errmsg (pip -> pathname, errno);
2675           error ("PIOCGFAULT failed");
2676         }
2677
2678       printf_filtered ("Current traced hardware fault set:\n\n");
2679       printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
2680
2681       for (transp = faults_table; transp -> name != NULL; transp++)
2682         {
2683           QUIT;
2684           printf_filtered ("\t%-12s ", transp -> name);
2685           printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
2686                            ? "on" : "off");
2687           printf_filtered ("\n");
2688         }
2689       printf_filtered ("\n");
2690     }
2691 }
2692
2693 static void
2694 info_proc_mappings (pip, summary)
2695      struct procinfo *pip;
2696      int summary;
2697 {
2698   int nmap;
2699   struct prmap *prmaps;
2700   struct prmap *prmap;
2701
2702   if (!summary)
2703     {
2704       printf_filtered ("Mapped address spaces:\n\n");
2705       printf_filtered ("\t%10s %10s %10s %10s %7s\n",
2706                        "Start Addr",
2707                        "  End Addr",
2708                        "      Size",
2709                        "    Offset",
2710                        "Flags");
2711       if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
2712         {
2713           prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
2714           if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
2715             {
2716               for (prmap = prmaps; prmap -> pr_size; ++prmap)
2717                 {
2718                   printf_filtered ("\t%#10x %#10x %#10x %#10x %7s\n",
2719                                    prmap -> pr_vaddr,
2720                                    prmap -> pr_vaddr + prmap -> pr_size - 1,
2721                                    prmap -> pr_size,
2722                                    prmap -> pr_off,
2723                                    mappingflags (prmap -> pr_mflags));
2724                 }
2725             }
2726         }
2727       printf_filtered ("\n");
2728     }
2729 }
2730
2731 /*
2732
2733 LOCAL FUNCTION
2734
2735         info_proc -- implement the "info proc" command
2736
2737 SYNOPSIS
2738
2739         void info_proc (char *args, int from_tty)
2740
2741 DESCRIPTION
2742
2743         Implement gdb's "info proc" command by using the /proc interface
2744         to print status information about any currently running process.
2745
2746         Examples of the use of "info proc" are:
2747
2748         info proc               (prints summary info for current inferior)
2749         info proc 123           (prints summary info for process with pid 123)
2750         info proc mappings      (prints address mappings)
2751         info proc times         (prints process/children times)
2752         info proc id            (prints pid, ppid, gid, sid, etc)
2753         info proc status        (prints general process state info)
2754         info proc signals       (prints info about signal handling)
2755         info proc all           (prints all info)
2756
2757  */
2758
2759 static void
2760 info_proc (args, from_tty)
2761      char *args;
2762      int from_tty;
2763 {
2764   int pid;
2765   struct procinfo pii;
2766   struct procinfo *pip;
2767   struct cleanup *old_chain;
2768   char **argv;
2769   int argsize;
2770   int summary = 1;
2771   int flags = 0;
2772   int syscalls = 0;
2773   int signals = 0;
2774   int faults = 0;
2775   int mappings = 0;
2776   int times = 0;
2777   int id = 0;
2778   int status = 0;
2779   int all = 0;
2780
2781   old_chain = make_cleanup (null_cleanup, 0);
2782
2783   /* Default to using the current inferior if no pid specified */
2784
2785   pip = &pi;
2786
2787   if (args != NULL)
2788     {
2789       if ((argv = buildargv (args)) == NULL)
2790         {
2791           nomem (0);
2792         }
2793       make_cleanup (freeargv, (char *) argv);
2794
2795       while (*argv != NULL)
2796         {
2797           argsize = strlen (*argv);
2798           if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
2799             {
2800               summary = 0;
2801               all = 1;
2802             }
2803           else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
2804             {
2805               summary = 0;
2806               faults = 1;
2807             }
2808           else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
2809             {
2810               summary = 0;
2811               flags = 1;
2812             }
2813           else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
2814             {
2815               summary = 0;
2816               id = 1;
2817             }
2818           else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
2819             {
2820               summary = 0;
2821               mappings = 1;
2822             }
2823           else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
2824             {
2825               summary = 0;
2826               signals = 1;
2827             }
2828           else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
2829             {
2830               summary = 0;
2831               status = 1;
2832             }
2833           else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
2834             {
2835               summary = 0;
2836               syscalls = 1;
2837             }
2838           else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
2839             {
2840               summary = 0;
2841               times = 1;
2842             }
2843           else if ((pii.pid = atoi (*argv)) > 0)
2844             {
2845               pid = pii.pid;
2846               pip = &pii;
2847               (void) memset (&pii, 0, sizeof (pii));
2848               if (!open_proc_file (pid, pip))
2849                 {
2850                   perror_with_name (pip -> pathname);
2851                   /* NOTREACHED */
2852                 }
2853               make_cleanup (close_proc_file, pip);
2854             }
2855           else if (**argv != '\000')
2856             {
2857               error ("Unrecognized or ambiguous keyword `%s'.", *argv);
2858             }
2859           argv++;
2860         }
2861     }
2862
2863   /* If we don't have a valid open process at this point, then we have no
2864      inferior or didn't specify a specific pid. */
2865
2866   if (!pip -> valid)
2867     {
2868       error ("No process.  Run an inferior or specify an explicit pid.");
2869     }
2870   if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
2871     {
2872       print_sys_errmsg (pip -> pathname, errno);
2873       error ("PIOCSTATUS failed");
2874     }
2875
2876   /* Print verbose information of the requested type(s), or just a summary
2877      of the information for all types. */
2878
2879   printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
2880   if (summary || all || flags)
2881     {
2882       info_proc_flags (pip, summary);
2883     }
2884   if (summary || all)
2885     {
2886       info_proc_stop (pip, summary);
2887     }
2888   if (summary || all || signals || faults)
2889     {
2890       info_proc_siginfo (pip, summary);
2891     }
2892   if (summary || all || syscalls)
2893     {
2894       info_proc_syscalls (pip, summary);
2895     }
2896   if (summary || all || mappings)
2897     {
2898       info_proc_mappings (pip, summary);
2899     }
2900   if (summary || all || signals)
2901     {
2902       info_proc_signals (pip, summary);
2903     }
2904   if (summary || all || faults)
2905     {
2906       info_proc_faults (pip, summary);
2907     }
2908   printf_filtered ("\n");
2909
2910   /* All done, deal with closing any temporary process info structure,
2911      freeing temporary memory , etc. */
2912
2913   do_cleanups (old_chain);
2914 }
2915
2916 /*
2917
2918 GLOBAL FUNCTION
2919
2920         _initialize_proc_fs -- initialize the process file system stuff
2921
2922 SYNOPSIS
2923
2924         void _initialize_proc_fs (void)
2925
2926 DESCRIPTION
2927
2928         Do required initializations during gdb startup for using the
2929         /proc file system interface.
2930
2931 */
2932
2933 static char *proc_desc =
2934 "Show process status information using /proc entry.\n\
2935 Specify process id or use current inferior by default.\n\
2936 Specify keywords for detailed information; default is summary.\n\
2937 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
2938 `status', `syscalls', and `times'.\n\
2939 Unambiguous abbreviations may be used.";
2940
2941 void
2942 _initialize_proc_fs ()
2943 {
2944   add_info ("proc", info_proc, proc_desc);
2945   init_syscall_table ();
2946 }
2947
2948 #endif  /* USE_PROC_FS */