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
  44 #include "inferior.h"
  45 #include "target.h"
  46
  47 #define MAX_SYSCALLS    256     /* Maximum number of syscalls for table */
  48
  49 #ifndef PROC_NAME_FMT
  50 #define PROC_NAME_FMT "/proc/%05d"
  51 #endif
  52
  53 #if 1   /* FIXME: Gross and ugly hack to resolve coredep.c global */
  54 CORE_ADDR kernel_u_addr;
  55 #endif
  56
  57 #ifdef BROKEN_SIGINFO_H         /* Workaround broken SGS <sys/siginfo.h> */
  58 #undef si_pid
  59 #define si_pid _data._proc.pid
  60 #undef si_uid
  61 #define si_uid _data._proc._pdata._kill.uid
  62 #endif /* BROKEN_SIGINFO_H */
  63
  64 /*  All access to the inferior, either one started by gdb or one that has
  65     been attached to, is controlled by an instance of a procinfo structure,
  66     defined below.  Since gdb currently only handles one inferior at a time,
  67     the procinfo structure for the inferior is statically allocated and
  68     only one exists at any given time.  There is a separate procinfo
  69     structure for use by the "info proc" command, so that we can print
  70     useful information about any random process without interfering with
  71     the inferior's procinfo information. */
  72
  73 struct procinfo {
  74   int valid;                    /* Nonzero if pid, fd, & pathname are valid */
  75   int pid;                      /* Process ID of inferior */
  76   int fd;                       /* File descriptor for /proc entry */
  77   char *pathname;               /* Pathname to /proc entry */
  78   int was_stopped;              /* Nonzero if was stopped prior to attach */
  79   int nopass_next_sigstop;      /* Don't pass a sigstop on next resume */
  80   prrun_t prrun;                /* Control state when it is run */
  81   prstatus_t prstatus;          /* Current process status info */
  82   gregset_t gregset;            /* General register set */
  83   fpregset_t fpregset;          /* Floating point register set */
  84   fltset_t fltset;              /* Current traced hardware fault set */
  85   sigset_t trace;               /* Current traced signal set */
  86   sysset_t exitset;             /* Current traced system call exit set */
  87   sysset_t entryset;            /* Current traced system call entry set */
  88   fltset_t saved_fltset;        /* Saved traced hardware fault set */
  89   sigset_t saved_trace;         /* Saved traced signal set */
  90   sigset_t saved_sighold;       /* Saved held signal set */
  91   sysset_t saved_exitset;       /* Saved traced system call exit set */
  92   sysset_t saved_entryset;      /* Saved traced system call entry set */
  93 };
  94
  95 static struct procinfo pi;      /* Inferior's process information */
  96
  97 /*  Much of the information used in the /proc interface, particularly for
  98     printing status information, is kept as tables of structures of the
  99     following form.  These tables can be used to map numeric values to
 100     their symbolic names and to a string that describes their specific use. */
 101
 102 struct trans {
 103   int value;                    /* The numeric value */
 104   char *name;                   /* The equivalent symbolic value */
 105   char *desc;                   /* Short description of value */
 106 };
 107
 108 /*  Translate bits in the pr_flags member of the prstatus structure, into the
 109     names and desc information. */
 110
 111 static struct trans pr_flag_table[] =
 112 {
 113 #if defined (PR_STOPPED)
 114   PR_STOPPED, "PR_STOPPED", "Process is stopped",
 115 #endif
 116 #if defined (PR_ISTOP)
 117   PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest",
 118 #endif
 119 #if defined (PR_DSTOP)
 120   PR_DSTOP, "PR_DSTOP", "A stop directive is in effect",
 121 #endif
 122 #if defined (PR_ASLEEP)
 123   PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call",
 124 #endif
 125 #if defined (PR_FORK)
 126   PR_FORK, "PR_FORK", "Inherit-on-fork is in effect",
 127 #endif
 128 #if defined (PR_RLC)
 129   PR_RLC, "PR_RLC", "Run-on-last-close is in effect",
 130 #endif
 131 #if defined (PR_PTRACE)
 132   PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace",
 133 #endif
 134 #if defined (PR_PCINVAL)
 135   PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address",
 136 #endif
 137 #if defined (PR_ISSYS)
 138   PR_ISSYS, "PR_ISSYS", "Is a system process",
 139 #endif
 140 #if defined (PR_STEP)
 141   PR_STEP, "PR_STEP", "Process has single step pending",
 142 #endif
 143 #if defined (PR_KLC)
 144   PR_KLC, "PR_KLC", "Kill-on-last-close is in effect",
 145 #endif
 146 #if defined (PR_ASYNC)
 147   PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect",
 148 #endif
 149 #if defined (PR_PCOMPAT)
 150   PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect",
 151 #endif
 152  0, NULL, NULL
 153 };
 154
 155 /*  Translate values in the pr_why field of the prstatus struct. */
 156
 157 static struct trans pr_why_table[] =
 158 {
 159 #if defined (PR_REQUESTED)
 160  PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP",
 161 #endif
 162 #if defined (PR_SIGNALLED)
 163  PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal",
 164 #endif
 165 #if defined (PR_FAULTED)
 166  PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault",
 167 #endif
 168 #if defined (PR_SYSENTRY)
 169  PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call",
 170 #endif
 171 #if defined (PR_SYSEXIT)
 172  PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call",
 173 #endif
 174 #if defined (PR_JOBCONTROL)
 175  PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action",
 176 #endif
 177 #if defined (PR_SUSPENDED)
 178  PR_SUSPENDED, "PR_SUSPENDED", "Process suspended",
 179 #endif
 180  0, NULL, NULL
 181 };
 182
 183 /*  Hardware fault translation table. */
 184
 185 static struct trans faults_table[] =
 186 {
 187 #if defined (FLTILL)
 188  FLTILL, "FLTILL", "Illegal instruction",
 189 #endif
 190 #if defined (FLTPRIV)
 191  FLTPRIV, "FLTPRIV", "Privileged instruction",
 192 #endif
 193 #if defined (FLTBPT)
 194  FLTBPT, "FLTBPT", "Breakpoint trap",
 195 #endif
 196 #if defined (FLTTRACE)
 197  FLTTRACE, "FLTTRACE", "Trace trap",
 198 #endif
 199 #if defined (FLTACCESS)
 200  FLTACCESS, "FLTACCESS", "Memory access fault",
 201 #endif
 202 #if defined (FLTBOUNDS)
 203  FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation",
 204 #endif
 205 #if defined (FLTIOVF)
 206  FLTIOVF, "FLTIOVF", "Integer overflow",
 207 #endif
 208 #if defined (FLTIZDIV)
 209  FLTIZDIV, "FLTIZDIV", "Integer zero divide",
 210 #endif
 211 #if defined (FLTFPE)
 212  FLTFPE, "FLTFPE", "Floating-point exception",
 213 #endif
 214 #if defined (FLTSTACK)
 215  FLTSTACK, "FLTSTACK", "Unrecoverable stack fault",
 216 #endif
 217 #if defined (FLTPAGE)
 218  FLTPAGE, "FLTPAGE", "Recoverable page fault",
 219 #endif
 220  0, NULL, NULL
 221 };
 222
 223 /* Translation table for signal generation information.  See UNIX System
 224    V Release 4 Programmer's Reference Manual, siginfo(5).  */
 225
 226 static struct sigcode {
 227   int signo;
 228   int code;
 229   char *codename;
 230   char *desc;
 231 } siginfo_table[] = {
 232 #if defined (SIGILL) && defined (ILL_ILLOPC)
 233   SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode",
 234 #endif
 235 #if defined (SIGILL) && defined (ILL_ILLOPN)
 236   SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand",
 237 #endif
 238 #if defined (SIGILL) && defined (ILL_ILLADR)
 239   SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode",
 240 #endif
 241 #if defined (SIGILL) && defined (ILL_ILLTRP)
 242   SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap",
 243 #endif
 244 #if defined (SIGILL) && defined (ILL_PRVOPC)
 245   SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode",
 246 #endif
 247 #if defined (SIGILL) && defined (ILL_PRVREG)
 248   SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register",
 249 #endif
 250 #if defined (SIGILL) && defined (ILL_COPROC)
 251   SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error",
 252 #endif
 253 #if defined (SIGILL) && defined (ILL_BADSTK)
 254   SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error",
 255 #endif
 256 #if defined (SIGFPE) && defined (FPE_INTDIV)
 257   SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero",
 258 #endif
 259 #if defined (SIGFPE) && defined (FPE_INTOVF)
 260   SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow",
 261 #endif
 262 #if defined (SIGFPE) && defined (FPE_FLTDIV)
 263   SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero",
 264 #endif
 265 #if defined (SIGFPE) && defined (FPE_FLTOVF)
 266   SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow",
 267 #endif
 268 #if defined (SIGFPE) && defined (FPE_FLTUND)
 269   SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow",
 270 #endif
 271 #if defined (SIGFPE) && defined (FPE_FLTRES)
 272   SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result",
 273 #endif
 274 #if defined (SIGFPE) && defined (FPE_FLTINV)
 275   SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation",
 276 #endif
 277 #if defined (SIGFPE) && defined (FPE_FLTSUB)
 278   SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range",
 279 #endif
 280 #if defined (SIGSEGV) && defined (SEGV_MAPERR)
 281   SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object",
 282 #endif
 283 #if defined (SIGSEGV) && defined (SEGV_ACCERR)
 284   SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object",
 285 #endif
 286 #if defined (SIGBUS) && defined (BUS_ADRALN)
 287   SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment",
 288 #endif
 289 #if defined (SIGBUS) && defined (BUS_ADRERR)
 290   SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address",
 291 #endif
 292 #if defined (SIGBUS) && defined (BUS_OBJERR)
 293   SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error",
 294 #endif
 295 #if defined (SIGTRAP) && defined (TRAP_BRKPT)
 296   SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint",
 297 #endif
 298 #if defined (SIGTRAP) && defined (TRAP_TRACE)
 299   SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap",
 300 #endif
 301 #if defined (SIGCLD) && defined (CLD_EXITED)
 302   SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited",
 303 #endif
 304 #if defined (SIGCLD) && defined (CLD_KILLED)
 305   SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed",
 306 #endif
 307 #if defined (SIGCLD) && defined (CLD_DUMPED)
 308   SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally",
 309 #endif
 310 #if defined (SIGCLD) && defined (CLD_TRAPPED)
 311   SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped",
 312 #endif
 313 #if defined (SIGCLD) && defined (CLD_STOPPED)
 314   SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped",
 315 #endif
 316 #if defined (SIGCLD) && defined (CLD_CONTINUED)
 317   SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued",
 318 #endif
 319 #if defined (SIGPOLL) && defined (POLL_IN)
 320   SIGPOLL, POLL_IN, "POLL_IN", "Input input available",
 321 #endif
 322 #if defined (SIGPOLL) && defined (POLL_OUT)
 323   SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available",
 324 #endif
 325 #if defined (SIGPOLL) && defined (POLL_MSG)
 326   SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available",
 327 #endif
 328 #if defined (SIGPOLL) && defined (POLL_ERR)
 329   SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error",
 330 #endif
 331 #if defined (SIGPOLL) && defined (POLL_PRI)
 332   SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available",
 333 #endif
 334 #if defined (SIGPOLL) && defined (POLL_HUP)
 335   SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected",
 336 #endif
 337   0, 0, NULL, NULL
 338 };
 339
 340 static char *syscall_table[MAX_SYSCALLS];
 341
 342 /* Prototypes for local functions */
 343
 344 static void
 345 set_proc_siginfo PARAMS ((struct procinfo *, int));
 346
 347 static void
 348 init_syscall_table PARAMS ((void));
 349
 350 static char *
 351 syscallname PARAMS ((int));
 352
 353 static char *
 354 signalname PARAMS ((int));
 355
 356 static char *
 357 errnoname PARAMS ((int));
 358
 359 static int
 360 proc_address_to_fd PARAMS ((CORE_ADDR, int));
 361
 362 static int
 363 open_proc_file PARAMS ((int, struct procinfo *));
 364
 365 static void
 366 close_proc_file PARAMS ((struct procinfo *));
 367
 368 static void
 369 unconditionally_kill_inferior PARAMS ((void));
 370
 371 static void
 372 proc_init_failed PARAMS ((char *));
 373
 374 static void
 375 info_proc PARAMS ((char *, int));
 376
 377 static void
 378 info_proc_flags PARAMS ((struct procinfo *, int));
 379
 380 static void
 381 info_proc_stop PARAMS ((struct procinfo *, int));
 382
 383 static void
 384 info_proc_siginfo PARAMS ((struct procinfo *, int));
 385
 386 static void
 387 info_proc_syscalls PARAMS ((struct procinfo *, int));
 388
 389 static void
 390 info_proc_mappings PARAMS ((struct procinfo *, int));
 391
 392 static void
 393 info_proc_signals PARAMS ((struct procinfo *, int));
 394
 395 static void
 396 info_proc_faults PARAMS ((struct procinfo *, int));
 397
 398 static char *
 399 mappingflags PARAMS ((long));
 400
 401 static char *
 402 lookupname PARAMS ((struct trans *, unsigned int, char *));
 403
 404 static char *
 405 lookupdesc PARAMS ((struct trans *, unsigned int));
 406
 407 /* External function prototypes that can't be easily included in any
 408    header file because the args are typedefs in system include files. */
 409
 410 extern void
 411 supply_gregset PARAMS ((gregset_t *));
 412
 413 extern void
 414 fill_gregset PARAMS ((gregset_t *, int));
 415
 416 extern void
 417 supply_fpregset PARAMS ((fpregset_t *));
 418
 419 extern void
 420 fill_fpregset PARAMS ((fpregset_t *, int));
 421
 422 /*
 423
 424 LOCAL FUNCTION
 425
 426         lookupdesc -- translate a value to a summary desc string
 427
 428 SYNOPSIS
 429
 430         static char *lookupdesc (struct trans *transp, unsigned int val);
 431
 432 DESCRIPTION
 433
 434         Given a pointer to a translation table and a value to be translated,
 435         lookup the desc string and return it.
 436  */
 437
 438 static char *
 439 lookupdesc (transp, val)
 440      struct trans *transp;
 441      unsigned int val;
 442 {
 443   char *desc;
 444
 445   for (desc = NULL; transp -> name != NULL; transp++)
 446     {
 447       if (transp -> value == val)
 448         {
 449           desc = transp -> desc;
 450           break;
 451         }
 452     }
 453
 454   /* Didn't find a translation for the specified value, set a default one. */
 455
 456   if (desc == NULL)
 457     {
 458       desc = "Unknown";
 459     }
 460   return (desc);
 461 }
 462
 463 /*
 464
 465 LOCAL FUNCTION
 466
 467         lookupname -- translate a value to symbolic name
 468
 469 SYNOPSIS
 470
 471         static char *lookupname (struct trans *transp, unsigned int val,
 472                                  char *prefix);
 473
 474 DESCRIPTION
 475
 476         Given a pointer to a translation table, a value to be translated,
 477         and a default prefix to return if the value can't be translated,
 478         match the value with one of the translation table entries and
 479         return a pointer to the symbolic name.
 480
 481         If no match is found it just returns the value as a printable string,
 482         with the given prefix.  The previous such value, if any, is freed
 483         at this time.
 484  */
 485
 486 static char *
 487 lookupname (transp, val, prefix)
 488      struct trans *transp;
 489      unsigned int val;
 490      char *prefix;
 491 {
 492   static char *locbuf;
 493   char *name;
 494
 495   for (name = NULL; transp -> name != NULL; transp++)
 496     {
 497       if (transp -> value == val)
 498         {
 499           name = transp -> name;
 500           break;
 501         }
 502     }
 503
 504   /* Didn't find a translation for the specified value, build a default
 505      one using the specified prefix and return it.  The lifetime of
 506      the value is only until the next one is needed. */
 507
 508   if (name == NULL)
 509     {
 510       if (locbuf != NULL)
 511         {
 512           free (locbuf);
 513         }
 514       locbuf = xmalloc (strlen (prefix) + 16);
 515       (void) sprintf (locbuf, "%s %u", prefix, val);
 516       name = locbuf;
 517     }
 518   return (name);
 519 }
 520
 521 static char *
 522 sigcodename (sip)
 523      siginfo_t *sip;
 524 {
 525   struct sigcode *scp;
 526   char *name = NULL;
 527   static char locbuf[32];
 528
 529   for (scp = siginfo_table; scp -> codename != NULL; scp++)
 530     {
 531       if ((scp -> signo == sip -> si_signo) &&
 532           (scp -> code == sip -> si_code))
 533         {
 534           name = scp -> codename;
 535           break;
 536         }
 537     }
 538   if (name == NULL)
 539     {
 540       (void) sprintf (locbuf, "sigcode %u", sip -> si_signo);
 541       name = locbuf;
 542     }
 543   return (name);
 544 }
 545
 546 static char *sigcodedesc (sip)
 547      siginfo_t *sip;
 548 {
 549   struct sigcode *scp;
 550   char *desc = NULL;
 551
 552   for (scp = siginfo_table; scp -> codename != NULL; scp++)
 553     {
 554       if ((scp -> signo == sip -> si_signo) &&
 555           (scp -> code == sip -> si_code))
 556         {
 557           desc = scp -> desc;
 558           break;
 559         }
 560     }
 561   if (desc == NULL)
 562     {
 563       desc = "Unrecognized signal or trap use";
 564     }
 565   return (desc);
 566 }
 567
 568 /*
 569
 570 LOCAL FUNCTION
 571
 572         syscallname - translate a system call number into a system call name
 573
 574 SYNOPSIS
 575
 576         char *syscallname (int syscallnum)
 577
 578 DESCRIPTION
 579
 580         Given a system call number, translate it into the printable name
 581         of a system call, or into "syscall <num>" if it is an unknown
 582         number.
 583  */
 584
 585 static char *
 586 syscallname (syscallnum)
 587      int syscallnum;
 588 {
 589   static char locbuf[32];
 590   char *rtnval;
 591
 592   if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
 593     {
 594       rtnval = syscall_table[syscallnum];
 595     }
 596   else
 597     {
 598       (void) sprintf (locbuf, "syscall %u", syscallnum);
 599       rtnval = locbuf;
 600     }
 601   return (rtnval);
 602 }
 603
 604 /*
 605
 606 LOCAL FUNCTION
 607
 608         init_syscall_table - initialize syscall translation table
 609
 610 SYNOPSIS
 611
 612         void init_syscall_table (void)
 613
 614 DESCRIPTION
 615
 616         Dynamically initialize the translation table to convert system
 617         call numbers into printable system call names.  Done once per
 618         gdb run, on initialization.
 619
 620 NOTES
 621
 622         This is awfully ugly, but preprocessor tricks to make it prettier
 623         tend to be nonportable.
 624  */
 625
 626 static void
 627 init_syscall_table ()
 628 {
 629   int syscallnum;
 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, int 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      int 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   CORE_ADDR baseaddr = 0;
1470
1471   if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
1472     {
1473       prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1474       if (ioctl (pi.fd, PIOCMAP, prmaps) == 0)
1475         {
1476           for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
1477             {
1478               fd = proc_address_to_fd ((CORE_ADDR) prmap -> pr_vaddr, 0);
1479               funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
1480               close (fd);
1481             }
1482         }
1483     }
1484   return (funcstat);
1485 }
1486
1487 /*
1488
1489 GLOBAL FUNCTION
1490
1491         proc_base_address -- find base address for segment containing address
1492
1493 SYNOPSIS
1494
1495         CORE_ADDR proc_base_address (CORE_ADDR addr)
1496
1497 DESCRIPTION
1498
1499         Given an address of a location in the inferior, find and return
1500         the base address of the mapped segment containing that address.
1501
1502         This is used for example, by the shared library support code,
1503         where we have the pc value for some location in the shared library
1504         where we are stopped, and need to know the base address of the
1505         segment containing that address.
1506 */
1507
1508
1509 #if 0   /* Currently unused */
1510
1511 CORE_ADDR
1512 proc_base_address (addr)
1513      CORE_ADDR addr;
1514 {
1515   int nmap;
1516   struct prmap *prmaps;
1517   struct prmap *prmap;
1518   CORE_ADDR baseaddr = 0;
1519
1520   if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
1521     {
1522       prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
1523       if (ioctl (pi.fd, PIOCMAP, prmaps) == 0)
1524         {
1525           for (prmap = prmaps; prmap -> pr_size; ++prmap)
1526             {
1527               if ((prmap -> pr_vaddr <= (caddr_t) addr) &&
1528                   (prmap -> pr_vaddr + prmap -> pr_size > (caddr_t) addr))
1529                 {
1530                   baseaddr = (CORE_ADDR) prmap -> pr_vaddr;
1531                   break;
1532                 }
1533             }
1534         }
1535     }
1536   return (baseaddr);
1537 }
1538
1539 #endif  /* 0 */
1540
1541 /*
1542
1543 LOCAL FUNCTION
1544
1545         proc_address_to_fd -- return open fd for file mapped to address
1546
1547 SYNOPSIS
1548
1549         int proc_address_to_fd (CORE_ADDR addr, complain)
1550
1551 DESCRIPTION
1552
1553         Given an address in the current inferior's address space, use the
1554         /proc interface to find an open file descriptor for the file that
1555         this address was mapped in from.  Return -1 if there is no current
1556         inferior.  Print a warning message if there is an inferior but
1557         the address corresponds to no file (IE a bogus address).
1558
1559 */
1560
1561 static int
1562 proc_address_to_fd (addr, complain)
1563      CORE_ADDR addr;
1564      int complain;
1565 {
1566   int fd = -1;
1567
1568   if (pi.valid)
1569     {
1570       if ((fd = ioctl (pi.fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
1571         {
1572           if (complain)
1573             {
1574               print_sys_errmsg (pi.pathname, errno);
1575               warning ("can't find mapped file for address 0x%x", addr);
1576             }
1577         }
1578     }
1579   return (fd);
1580 }
1581
1582
1583 #ifdef ATTACH_DETACH
1584
1585 /*
1586
1587 GLOBAL FUNCTION
1588
1589         attach -- attach to an already existing process
1590
1591 SYNOPSIS
1592
1593         int attach (int pid)
1594
1595 DESCRIPTION
1596
1597         Attach to an already existing process with the specified process
1598         id.  If the process is not already stopped, query whether to
1599         stop it or not.
1600
1601 NOTES
1602
1603         The option of stopping at attach time is specific to the /proc
1604         versions of gdb.  Versions using ptrace force the attachee
1605         to stop.
1606
1607 */
1608
1609 int
1610 attach (pid)
1611      int pid;
1612 {
1613   if (!open_proc_file (pid, &pi))
1614     {
1615       perror_with_name (pi.pathname);
1616       /* NOTREACHED */
1617     }
1618
1619   /*  Get current status of process and if it is not already stopped,
1620       then stop it.  Remember whether or not it was stopped when we first
1621       examined it. */
1622
1623   if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
1624     {
1625       print_sys_errmsg (pi.pathname, errno);
1626       close_proc_file (&pi);
1627       error ("PIOCSTATUS failed");
1628     }
1629   if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
1630     {
1631       pi.was_stopped = 1;
1632     }
1633   else
1634     {
1635       pi.was_stopped = 0;
1636       if (query ("Process is currently running, stop it? "))
1637         {
1638           if (ioctl (pi.fd, PIOCSTOP, &pi.prstatus) < 0)
1639             {
1640               print_sys_errmsg (pi.pathname, errno);
1641               close_proc_file (&pi);
1642               error ("PIOCSTOP failed");
1643             }
1644           pi.nopass_next_sigstop = 1;
1645         }
1646       else
1647         {
1648           printf ("Ok, gdb will wait for process %u to stop.\n", pid);
1649         }
1650     }
1651
1652   /*  Remember some things about the inferior that we will, or might, change
1653       so that we can restore them when we detach. */
1654
1655   (void) ioctl (pi.fd, PIOCGTRACE, &pi.saved_trace);
1656   (void) ioctl (pi.fd, PIOCGHOLD, &pi.saved_sighold);
1657   (void) ioctl (pi.fd, PIOCGFAULT, &pi.saved_fltset);
1658   (void) ioctl (pi.fd, PIOCGENTRY, &pi.saved_entryset);
1659   (void) ioctl (pi.fd, PIOCGEXIT, &pi.saved_exitset);
1660
1661   /* Set up trace and fault sets, as gdb expects them. */
1662
1663   (void) memset (&pi.prrun, 0, sizeof (pi.prrun));
1664   prfillset (&pi.prrun.pr_trace);
1665   proc_signal_handling_change ();
1666   prfillset (&pi.prrun.pr_fault);
1667   prdelset (&pi.prrun.pr_fault, FLTPAGE);
1668   if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault))
1669     {
1670       print_sys_errmsg ("PIOCSFAULT failed", errno);
1671     }
1672   if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace))
1673     {
1674       print_sys_errmsg ("PIOCSTRACE failed", errno);
1675     }
1676   attach_flag = 1;
1677   return (pid);
1678 }
1679
1680 /*
1681
1682 GLOBAL FUNCTION
1683
1684         detach -- detach from an attached-to process
1685
1686 SYNOPSIS
1687
1688         void detach (int signal)
1689
1690 DESCRIPTION
1691
1692         Detach from the current attachee.
1693
1694         If signal is non-zero, the attachee is started running again and sent
1695         the specified signal.
1696
1697         If signal is zero and the attachee was not already stopped when we
1698         attached to it, then we make it runnable again when we detach.
1699
1700         Otherwise, we query whether or not to make the attachee runnable
1701         again, since we may simply want to leave it in the state it was in
1702         when we attached.
1703
1704         We report any problems, but do not consider them errors, since we
1705         MUST detach even if some things don't seem to go right.  This may not
1706         be the ideal situation.  (FIXME).
1707  */
1708
1709 void
1710 detach (signal)
1711      int signal;
1712 {
1713   if (signal)
1714     {
1715       set_proc_siginfo (&pi, signal);
1716     }
1717   if (ioctl (pi.fd, PIOCSEXIT, &pi.saved_exitset) < 0)
1718     {
1719       print_sys_errmsg (pi.pathname, errno);
1720       printf ("PIOCSEXIT failed.\n");
1721     }
1722   if (ioctl (pi.fd, PIOCSENTRY, &pi.saved_entryset) < 0)
1723     {
1724       print_sys_errmsg (pi.pathname, errno);
1725       printf ("PIOCSENTRY failed.\n");
1726     }
1727   if (ioctl (pi.fd, PIOCSTRACE, &pi.saved_trace) < 0)
1728     {
1729       print_sys_errmsg (pi.pathname, errno);
1730       printf ("PIOCSTRACE failed.\n");
1731     }
1732   if (ioctl (pi.fd, PIOCSHOLD, &pi.saved_sighold) < 0)
1733     {
1734       print_sys_errmsg (pi.pathname, errno);
1735       printf ("PIOSCHOLD failed.\n");
1736     }
1737   if (ioctl (pi.fd, PIOCSFAULT, &pi.saved_fltset) < 0)
1738     {
1739       print_sys_errmsg (pi.pathname, errno);
1740       printf ("PIOCSFAULT failed.\n");
1741     }
1742   if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
1743     {
1744       print_sys_errmsg (pi.pathname, errno);
1745       printf ("PIOCSTATUS failed.\n");
1746     }
1747   else
1748     {
1749       if (signal || (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
1750         {
1751           if (signal || !pi.was_stopped ||
1752               query ("Was stopped when attached, make it runnable again? "))
1753             {
1754               (void) memset (&pi.prrun, 0, sizeof (pi.prrun));
1755               pi.prrun.pr_flags = PRCFAULT;
1756               if (ioctl (pi.fd, PIOCRUN, &pi.prrun))
1757                 {
1758                   print_sys_errmsg (pi.pathname, errno);
1759                   printf ("PIOCRUN failed.\n");
1760                 }
1761             }
1762         }
1763     }
1764   close_proc_file (&pi);
1765   attach_flag = 0;
1766 }
1767
1768 #endif  /* ATTACH_DETACH */
1769
1770 /*
1771
1772 GLOBAL FUNCTION
1773
1774         proc_wait -- emulate wait() as much as possible
1775
1776 SYNOPSIS
1777
1778         int proc_wait (int *statloc)
1779
1780 DESCRIPTION
1781
1782         Try to emulate wait() as much as possible.  Not sure why we can't
1783         just use wait(), but it seems to have problems when applied to a
1784         process being controlled with the /proc interface.
1785
1786 NOTES
1787
1788         We have a race problem here with no obvious solution.  We need to let
1789         the inferior run until it stops on an event of interest, which means
1790         that we need to use the PIOCWSTOP ioctl.  However, we cannot use this
1791         ioctl if the process is already stopped on something that is not an
1792         event of interest, or the call will hang indefinitely.  Thus we first
1793         use PIOCSTATUS to see if the process is not stopped.  If not, then we
1794         use PIOCWSTOP.  But during the window between the two, if the process
1795         stops for any reason that is not an event of interest (such as a job
1796         control signal) then gdb will hang.  One possible workaround is to set
1797         an alarm to wake up every minute of so and check to see if the process
1798         is still running, and if so, then reissue the PIOCWSTOP.  But this is
1799         a real kludge, so has not been implemented.  FIXME: investigate
1800         alternatives.
1801
1802         FIXME:  Investigate why wait() seems to have problems with programs
1803         being control by /proc routines.
1804
1805  */
1806
1807 int
1808 proc_wait (statloc)
1809      int *statloc;
1810 {
1811   short what;
1812   short why;
1813   int statval = 0;
1814   int checkerr = 0;
1815   int rtnval = -1;
1816
1817   if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
1818     {
1819       checkerr++;
1820     }
1821   else if (!(pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
1822     {
1823       if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
1824         {
1825           checkerr++;
1826         }
1827     }
1828   if (checkerr)
1829     {
1830       if (errno == ENOENT)
1831         {
1832           rtnval = wait (&statval);
1833           if (rtnval != inferior_pid)
1834             {
1835               error ("PIOCWSTOP, wait failed, returned %d", rtnval);
1836               /* NOTREACHED */
1837             }
1838         }
1839       else
1840         {
1841           print_sys_errmsg (pi.pathname, errno);
1842           error ("PIOCSTATUS or PIOCWSTOP failed.");
1843           /* NOTREACHED */
1844         }
1845     }
1846   else if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
1847     {
1848       rtnval = pi.prstatus.pr_pid;
1849       why = pi.prstatus.pr_why;
1850       what = pi.prstatus.pr_what;
1851       if (why == PR_SIGNALLED)
1852         {
1853           statval = (what << 8) | 0177;
1854         }
1855       else if ((why == PR_SYSEXIT)
1856                &&
1857                (
1858 #ifdef SYS_exec
1859                 what == SYS_exec
1860 #else
1861                 0 == 0
1862 #endif
1863 #ifdef SYS_execve
1864                 || what == SYS_execve
1865 #endif
1866 #ifdef SYS_execv
1867                 || what == SYS_execv
1868 #endif
1869                 ))
1870         {
1871           statval = (SIGTRAP << 8) | 0177;
1872         }
1873       else if (why == PR_REQUESTED)
1874         {
1875           statval = (SIGSTOP << 8) | 0177;
1876         }
1877       else if (why == PR_JOBCONTROL)
1878         {
1879           statval = (what << 8) | 0177;
1880         }
1881       else if (why == PR_FAULTED)
1882         {
1883           switch (what)
1884             {
1885             case FLTPRIV:
1886             case FLTILL:
1887               statval = (SIGILL << 8) | 0177;
1888               break;
1889             case FLTBPT:
1890             case FLTTRACE:
1891               statval = (SIGTRAP << 8) | 0177;
1892               break;
1893             case FLTSTACK:
1894             case FLTACCESS:
1895             case FLTBOUNDS:
1896               statval = (SIGSEGV << 8) | 0177;
1897               break;
1898             case FLTIOVF:
1899             case FLTIZDIV:
1900             case FLTFPE:
1901               statval = (SIGFPE << 8) | 0177;
1902               break;
1903             case FLTPAGE:               /* Recoverable page fault */
1904             default:
1905               rtnval = -1;
1906               error ("PIOCWSTOP, unknown why %d, what %d", why, what);
1907               /* NOTREACHED */
1908             }
1909         }
1910       else
1911         {
1912           rtnval = -1;
1913           error ("PIOCWSTOP, unknown why %d, what %d", why, what);
1914           /* NOTREACHED */
1915         }
1916     }
1917   else
1918     {
1919       error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
1920              pi.prstatus.pr_flags);
1921           /* NOTREACHED */
1922     }
1923   if (statloc)
1924     {
1925       *statloc = statval;
1926     }
1927   return (rtnval);
1928 }
1929
1930 /*
1931
1932 LOCAL FUNCTION
1933
1934         set_proc_siginfo - set a process's current signal info
1935
1936 SYNOPSIS
1937
1938         void set_proc_siginfo (struct procinfo *pip, int signo);
1939
1940 DESCRIPTION
1941
1942         Given a pointer to a process info struct in PIP and a signal number
1943         in SIGNO, set the process's current signal and its associated signal
1944         information.  The signal will be delivered to the process immediately
1945         after execution is resumed, even if it is being held.  In addition,
1946         this particular delivery will not cause another PR_SIGNALLED stop
1947         even if the signal is being traced.
1948
1949         If we are not delivering the same signal that the prstatus siginfo
1950         struct contains information about, then synthesize a siginfo struct
1951         to match the signal we are doing to deliver, make it of the type
1952         "generated by a user process", and send this synthesized copy.  When
1953         used to set the inferior's signal state, this will be required if we
1954         are not currently stopped because of a traced signal, or if we decide
1955         to continue with a different signal.
1956
1957         Note that when continuing the inferior from a stop due to receipt
1958         of a traced signal, we either have set PRCSIG to clear the existing
1959         signal, or we have to call this function to do a PIOCSSIG with either
1960         the existing siginfo struct from pr_info, or one we have synthesized
1961         appropriately for the signal we want to deliver.  Otherwise if the
1962         signal is still being traced, the inferior will immediately stop
1963         again.
1964
1965         See siginfo(5) for more details.
1966 */
1967
1968 static void
1969 set_proc_siginfo (pip, signo)
1970      struct procinfo *pip;
1971      int signo;
1972 {
1973   struct siginfo newsiginfo;
1974   struct siginfo *sip;
1975
1976   if (pip -> valid)
1977     {
1978       if (signo == pip -> prstatus.pr_info.si_signo)
1979         {
1980           sip = &pip -> prstatus.pr_info;
1981         }
1982       else
1983         {
1984           (void) memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
1985           sip = &newsiginfo;
1986           sip -> si_signo = signo;
1987           sip -> si_code = 0;
1988           sip -> si_errno = 0;
1989           sip -> si_pid = getpid ();
1990           sip -> si_uid = getuid ();
1991         }
1992       if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
1993         {
1994           print_sys_errmsg (pip -> pathname, errno);
1995           warning ("PIOCSSIG failed");
1996         }
1997     }
1998 }
1999
2000 /*
2001
2002 GLOBAL FUNCTION
2003
2004         child_resume -- resume execution of the inferior process
2005
2006 SYNOPSIS
2007
2008         void child_resume (int step, int signo)
2009
2010 DESCRIPTION
2011
2012         Resume execution of the inferior process.  If STEP is nozero, then
2013         just single step it.  If SIGNAL is nonzero, restart it with that
2014         signal activated.
2015
2016 NOTE
2017
2018         It may not be absolutely necessary to specify the PC value for
2019         restarting, but to be safe we use the value that gdb considers
2020         to be current.  One case where this might be necessary is if the
2021         user explicitly changes the PC value that gdb considers to be
2022         current.  FIXME:  Investigate if this is necessary or not.
2023
2024         When attaching to a child process, if we forced it to stop with
2025         a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
2026         Upon resuming the first time after such a stop, we explicitly
2027         inhibit sending it another SIGSTOP, which would be the normal
2028         result of default signal handling.  One potential drawback to
2029         this is that we will also ignore any attempt to by the user
2030         to explicitly continue after the attach with a SIGSTOP.  Ultimately
2031         this problem should be dealt with by making the routines that
2032         deal with the inferior a little smarter, and possibly even allow
2033         an inferior to continue running at the same time as gdb.  (FIXME?)
2034  */
2035
2036 void
2037 child_resume (step, signo)
2038      int step;
2039      int signo;
2040 {
2041   errno = 0;
2042   pi.prrun.pr_flags = PRSVADDR | PRSTRACE | PRSFAULT | PRCFAULT;
2043   pi.prrun.pr_vaddr = (caddr_t) *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];
2044   if (signo && !(signo == SIGSTOP && pi.nopass_next_sigstop))
2045     {
2046       set_proc_siginfo (&pi, signo);
2047     }
2048   else
2049     {
2050       pi.prrun.pr_flags |= PRCSIG;
2051     }
2052   pi.nopass_next_sigstop = 0;
2053   if (step)
2054     {
2055       pi.prrun.pr_flags |= PRSTEP;
2056     }
2057   if (ioctl (pi.fd, PIOCRUN, &pi.prrun) != 0)
2058     {
2059       perror_with_name (pi.pathname);
2060       /* NOTREACHED */
2061     }
2062 }
2063
2064 /*
2065
2066 GLOBAL FUNCTION
2067
2068         fetch_inferior_registers -- fetch current registers from inferior
2069
2070 SYNOPSIS
2071
2072         void fetch_inferior_registers (int regno)
2073
2074 DESCRIPTION
2075
2076         Read the current values of the inferior's registers, both the
2077         general register set and floating point registers (if supported)
2078         and update gdb's idea of their current values.
2079
2080 */
2081
2082 void
2083 fetch_inferior_registers (regno)
2084      int regno;
2085 {
2086   if (ioctl (pi.fd, PIOCGREG, &pi.gregset) != -1)
2087     {
2088       supply_gregset (&pi.gregset);
2089     }
2090 #if defined (FP0_REGNUM)
2091   if (ioctl (pi.fd, PIOCGFPREG, &pi.fpregset) != -1)
2092     {
2093       supply_fpregset (&pi.fpregset);
2094     }
2095 #endif
2096 }
2097
2098 /*
2099
2100 GLOBAL FUNCTION
2101
2102         fetch_core_registers -- fetch current registers from core file data
2103
2104 SYNOPSIS
2105
2106         void fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
2107                                    int which, unsigned in reg_addr)
2108
2109 DESCRIPTION
2110
2111         Read the values of either the general register set (WHICH equals 0)
2112         or the floating point register set (WHICH equals 2) from the core
2113         file data (pointed to by CORE_REG_SECT), and update gdb's idea of
2114         their current values.  The CORE_REG_SIZE parameter is ignored.
2115
2116 NOTES
2117
2118         Use the indicated sizes to validate the gregset and fpregset
2119         structures.
2120 */
2121
2122 void
2123 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
2124      char *core_reg_sect;
2125      unsigned core_reg_size;
2126      int which;
2127      unsigned int reg_addr;     /* Unused in this version */
2128 {
2129
2130   if (which == 0)
2131     {
2132       if (core_reg_size != sizeof (pi.gregset))
2133         {
2134           warning ("wrong size gregset struct in core file");
2135         }
2136       else
2137         {
2138           (void) memcpy ((char *) &pi.gregset, core_reg_sect,
2139                          sizeof (pi.gregset));
2140           supply_gregset (&pi.gregset);
2141         }
2142     }
2143   else if (which == 2)
2144     {
2145       if (core_reg_size != sizeof (pi.fpregset))
2146         {
2147           warning ("wrong size fpregset struct in core file");
2148         }
2149       else
2150         {
2151           (void) memcpy ((char *) &pi.fpregset, core_reg_sect,
2152                          sizeof (pi.fpregset));
2153 #if defined (FP0_REGNUM)
2154           supply_fpregset (&pi.fpregset);
2155 #endif
2156         }
2157     }
2158 }
2159
2160 /*
2161
2162 LOCAL FUNCTION
2163
2164         proc_init_failed - called whenever /proc access initialization fails
2165
2166 SYNOPSIS
2167
2168         static void proc_init_failed (char *why)
2169
2170 DESCRIPTION
2171
2172         This function is called whenever initialization of access to a /proc
2173         entry fails.  It prints a suitable error message, does some cleanup,
2174         and then invokes the standard error processing routine which dumps
2175         us back into the command loop.
2176  */
2177
2178 static void
2179 proc_init_failed (why)
2180      char *why;
2181 {
2182   print_sys_errmsg (pi.pathname, errno);
2183   (void) kill (pi.pid, SIGKILL);
2184   close_proc_file (&pi);
2185   error (why);
2186   /* NOTREACHED */
2187 }
2188
2189 /*
2190
2191 LOCAL FUNCTION
2192
2193         close_proc_file - close any currently open /proc entry
2194
2195 SYNOPSIS
2196
2197         static void close_proc_file (struct procinfo *pip)
2198
2199 DESCRIPTION
2200
2201         Close any currently open /proc entry and mark the process information
2202         entry as invalid.  In order to ensure that we don't try to reuse any
2203         stale information, the pid, fd, and pathnames are explicitly
2204         invalidated, which may be overkill.
2205
2206  */
2207
2208 static void
2209 close_proc_file (pip)
2210      struct procinfo *pip;
2211 {
2212   pip -> pid = 0;
2213   if (pip -> valid)
2214     {
2215       (void) close (pip -> fd);
2216     }
2217   pip -> fd = -1;
2218   if (pip -> pathname)
2219     {
2220       free (pip -> pathname);
2221       pip -> pathname = NULL;
2222     }
2223   pip -> valid = 0;
2224 }
2225
2226 /*
2227
2228 LOCAL FUNCTION
2229
2230         open_proc_file - open a /proc entry for a given process id
2231
2232 SYNOPSIS
2233
2234         static int open_proc_file (pid, struct procinfo *pip)
2235
2236 DESCRIPTION
2237
2238         Given a process id, close the existing open /proc entry (if any)
2239         and open one for the new process id.  Once it is open, then
2240         mark the local process information structure as valid, which
2241         guarantees that the pid, fd, and pathname fields match an open
2242         /proc entry.  Returns zero if the open fails, nonzero otherwise.
2243
2244         Note that the pathname is left intact, even when the open fails,
2245         so that callers can use it to construct meaningful error messages
2246         rather than just "file open failed".
2247  */
2248
2249 static int
2250 open_proc_file (pid, pip)
2251      int pid;
2252      struct procinfo *pip;
2253 {
2254   pip -> valid = 0;
2255   if (pip -> valid)
2256     {
2257       (void) close (pip -> fd);
2258     }
2259   if (pip -> pathname == NULL)
2260     {
2261       pip -> pathname = xmalloc (32);
2262     }
2263   sprintf (pip -> pathname, PROC_NAME_FMT, pid);
2264   if ((pip -> fd = open (pip -> pathname, O_RDWR)) >= 0)
2265     {
2266       pip -> valid = 1;
2267       pip -> pid = pid;
2268     }
2269   return (pip -> valid);
2270 }
2271
2272 static char *
2273 mappingflags (flags)
2274      long flags;
2275 {
2276   static char asciiflags[8];
2277
2278   strcpy (asciiflags, "-------");
2279 #if defined (MA_PHYS)
2280   if (flags & MA_PHYS)   asciiflags[0] = 'd';
2281 #endif
2282   if (flags & MA_STACK)  asciiflags[1] = 's';
2283   if (flags & MA_BREAK)  asciiflags[2] = 'b';
2284   if (flags & MA_SHARED) asciiflags[3] = 's';
2285   if (flags & MA_READ)   asciiflags[4] = 'r';
2286   if (flags & MA_WRITE)  asciiflags[5] = 'w';
2287   if (flags & MA_EXEC)   asciiflags[6] = 'x';
2288   return (asciiflags);
2289 }
2290
2291 static void
2292 info_proc_flags (pip, summary)
2293      struct procinfo *pip;
2294      int summary;
2295 {
2296   struct trans *transp;
2297
2298   printf_filtered ("%-32s", "Process status flags:");
2299   if (!summary)
2300     {
2301       printf_filtered ("\n\n");
2302     }
2303   for (transp = pr_flag_table; transp -> name != NULL; transp++)
2304     {
2305       if (pip -> prstatus.pr_flags & transp -> value)
2306         {
2307           if (summary)
2308             {
2309               printf_filtered ("%s ", transp -> name);
2310             }
2311           else
2312             {
2313               printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
2314             }
2315         }
2316     }
2317   printf_filtered ("\n");
2318 }
2319
2320 static void
2321 info_proc_stop (pip, summary)
2322      struct procinfo *pip;
2323      int summary;
2324 {
2325   struct trans *transp;
2326   int why;
2327   int what;
2328
2329   why = pip -> prstatus.pr_why;
2330   what = pip -> prstatus.pr_what;
2331
2332   if (pip -> prstatus.pr_flags & PR_STOPPED)
2333     {
2334       printf_filtered ("%-32s", "Reason for stopping:");
2335       if (!summary)
2336         {
2337           printf_filtered ("\n\n");
2338         }
2339       for (transp = pr_why_table; transp -> name != NULL; transp++)
2340         {
2341           if (why == transp -> value)
2342             {
2343               if (summary)
2344                 {
2345                   printf_filtered ("%s ", transp -> name);
2346                 }
2347               else
2348                 {
2349                   printf_filtered ("\t%-16s %s.\n",
2350                                    transp -> name, transp -> desc);
2351                 }
2352               break;
2353             }
2354         }
2355
2356       /* Use the pr_why field to determine what the pr_what field means, and
2357          print more information. */
2358
2359       switch (why)
2360         {
2361           case PR_REQUESTED:
2362             /* pr_what is unused for this case */
2363             break;
2364           case PR_JOBCONTROL:
2365           case PR_SIGNALLED:
2366             if (summary)
2367               {
2368                 printf_filtered ("%s ", signalname (what));
2369               }
2370             else
2371               {
2372                 printf_filtered ("\t%-16s %s.\n", signalname (what),
2373                                  safe_strsignal (what));
2374               }
2375             break;
2376           case PR_SYSENTRY:
2377             if (summary)
2378               {
2379                 printf_filtered ("%s ", syscallname (what));
2380               }
2381             else
2382               {
2383                 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2384                                  "Entered this system call");
2385               }
2386             break;
2387           case PR_SYSEXIT:
2388             if (summary)
2389               {
2390                 printf_filtered ("%s ", syscallname (what));
2391               }
2392             else
2393               {
2394                 printf_filtered ("\t%-16s %s.\n", syscallname (what),
2395                                  "Returned from this system call");
2396               }
2397             break;
2398           case PR_FAULTED:
2399             if (summary)
2400               {
2401                 printf_filtered ("%s ",
2402                                  lookupname (faults_table, what, "fault"));
2403               }
2404             else
2405               {
2406                 printf_filtered ("\t%-16s %s.\n",
2407                                  lookupname (faults_table, what, "fault"),
2408                                  lookupdesc (faults_table, what));
2409               }
2410             break;
2411           }
2412       printf_filtered ("\n");
2413     }
2414 }
2415
2416 static void
2417 info_proc_siginfo (pip, summary)
2418      struct procinfo *pip;
2419      int summary;
2420 {
2421   struct siginfo *sip;
2422
2423   if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
2424       (pip -> prstatus.pr_why == PR_SIGNALLED ||
2425        pip -> prstatus.pr_why == PR_FAULTED))
2426     {
2427       printf_filtered ("%-32s", "Additional signal/fault info:");
2428       sip = &pip -> prstatus.pr_info;
2429       if (summary)
2430         {
2431           printf_filtered ("%s ", signalname (sip -> si_signo));
2432           if (sip -> si_errno > 0)
2433             {
2434               printf_filtered ("%s ", errnoname (sip -> si_errno));
2435             }
2436           if (sip -> si_code <= 0)
2437             {
2438               printf_filtered ("sent by pid %d, uid %d ", sip -> si_pid,
2439                                sip -> si_uid);
2440             }
2441           else
2442             {
2443               printf_filtered ("%s ", sigcodename (sip));
2444               if ((sip -> si_signo == SIGILL) ||
2445                   (sip -> si_signo == SIGFPE) ||
2446                   (sip -> si_signo == SIGSEGV) ||
2447                   (sip -> si_signo == SIGBUS))
2448                 {
2449                   printf_filtered ("addr=%#x ", sip -> si_addr);
2450                 }
2451               else if ((sip -> si_signo == SIGCHLD))
2452                 {
2453                   printf_filtered ("child pid %u, status %u ",
2454                                    sip -> si_pid,
2455                                    sip -> si_status);
2456                 }
2457               else if ((sip -> si_signo == SIGPOLL))
2458                 {
2459                   printf_filtered ("band %u ", sip -> si_band);
2460                 }
2461             }
2462         }
2463       else
2464         {
2465           printf_filtered ("\n\n");
2466           printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
2467                            safe_strsignal (sip -> si_signo));
2468           if (sip -> si_errno > 0)
2469             {
2470               printf_filtered ("\t%-16s %s.\n",
2471                                errnoname (sip -> si_errno),
2472                                safe_strerror (sip -> si_errno));
2473             }
2474           if (sip -> si_code <= 0)
2475             {
2476               printf_filtered ("\t%-16u %s\n", sip -> si_pid,
2477                                "PID of process sending signal");
2478               printf_filtered ("\t%-16u %s\n", sip -> si_uid,
2479                                "UID of process sending signal");
2480             }
2481           else
2482             {
2483               printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
2484                                sigcodedesc (sip));
2485               if ((sip -> si_signo == SIGILL) ||
2486                   (sip -> si_signo == SIGFPE))
2487                 {
2488                   printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2489                                    "Address of faulting instruction");
2490                 }
2491               else if ((sip -> si_signo == SIGSEGV) ||
2492                        (sip -> si_signo == SIGBUS))
2493                 {
2494                   printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
2495                                    "Address of faulting memory reference");
2496                 }
2497               else if ((sip -> si_signo == SIGCHLD))
2498                 {
2499                   printf_filtered ("\t%-16u %s.\n", sip -> si_pid,
2500                                    "Child process ID");
2501                   printf_filtered ("\t%-16u %s.\n", sip -> si_status,
2502                                    "Child process exit value or signal");
2503                 }
2504               else if ((sip -> si_signo == SIGPOLL))
2505                 {
2506                   printf_filtered ("\t%-16u %s.\n", sip -> si_band,
2507                                    "Band event for POLL_{IN,OUT,MSG}");
2508                 }
2509             }
2510         }
2511       printf_filtered ("\n");
2512     }
2513 }
2514
2515 static void
2516 info_proc_syscalls (pip, summary)
2517      struct procinfo *pip;
2518      int summary;
2519 {
2520   int syscallnum;
2521
2522   if (!summary)
2523     {
2524
2525 #if 0   /* FIXME:  Needs to use gdb-wide configured info about system calls. */
2526       if (pip -> prstatus.pr_flags & PR_ASLEEP)
2527         {
2528           int syscallnum = pip -> prstatus.pr_reg[R_D0];
2529           if (summary)
2530             {
2531               printf_filtered ("%-32s", "Sleeping in system call:");
2532               printf_filtered ("%s", syscallname (syscallnum));
2533             }
2534           else
2535             {
2536               printf_filtered ("Sleeping in system call '%s'.\n",
2537                                syscallname (syscallnum));
2538             }
2539         }
2540 #endif
2541
2542       if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
2543         {
2544           print_sys_errmsg (pip -> pathname, errno);
2545           error ("PIOCGENTRY failed");
2546         }
2547
2548       if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
2549         {
2550           print_sys_errmsg (pip -> pathname, errno);
2551           error ("PIOCGEXIT failed");
2552         }
2553
2554       printf_filtered ("System call tracing information:\n\n");
2555
2556       printf_filtered ("\t%-12s %-8s %-8s\n",
2557                        "System call",
2558                        "Entry",
2559                        "Exit");
2560       for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
2561         {
2562           QUIT;
2563           if (syscall_table[syscallnum] != NULL)
2564             {
2565               printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
2566               printf_filtered ("%-8s ",
2567                                prismember (&pip -> entryset, syscallnum)
2568                                ? "on" : "off");
2569               printf_filtered ("%-8s ",
2570                                prismember (&pip -> exitset, syscallnum)
2571                                ? "on" : "off");
2572               printf_filtered ("\n");
2573             }
2574           }
2575       printf_filtered ("\n");
2576     }
2577 }
2578
2579 static char *
2580 signalname (signo)
2581      int signo;
2582 {
2583   char *name;
2584   static char locbuf[32];
2585
2586   name = strsigno (signo);
2587   if (name == NULL)
2588     {
2589       sprintf (locbuf, "Signal %d", signo);
2590     }
2591   else
2592     {
2593       sprintf (locbuf, "%s (%d)", name, signo);
2594     }
2595   return (locbuf);
2596 }
2597
2598 static char *
2599 errnoname (errnum)
2600      int errnum;
2601 {
2602   char *name;
2603   static char locbuf[32];
2604
2605   name = strerrno (errnum);
2606   if (name == NULL)
2607     {
2608       sprintf (locbuf, "Errno %d", errnum);
2609     }
2610   else
2611     {
2612       sprintf (locbuf, "%s (%d)", name, errnum);
2613     }
2614   return (locbuf);
2615 }
2616
2617 static void
2618 info_proc_signals (pip, summary)
2619      struct procinfo *pip;
2620      int summary;
2621 {
2622   int signo;
2623
2624   if (!summary)
2625     {
2626       if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
2627         {
2628           print_sys_errmsg (pip -> pathname, errno);
2629           error ("PIOCGTRACE failed");
2630         }
2631
2632       printf_filtered ("Disposition of signals:\n\n");
2633       printf_filtered ("\t%-15s %-8s %-8s %-8s  %s\n\n",
2634                        "Signal", "Trace", "Hold", "Pending", "Description");
2635       for (signo = 0; signo < NSIG; signo++)
2636         {
2637           QUIT;
2638           printf_filtered ("\t%-15s ", signalname (signo));
2639           printf_filtered ("%-8s ",
2640                            prismember (&pip -> trace, signo)
2641                            ? "on" : "off");
2642           printf_filtered ("%-8s ",
2643                            prismember (&pip -> prstatus.pr_sighold, signo)
2644                            ? "on" : "off");
2645           printf_filtered ("%-8s ",
2646                            prismember (&pip -> prstatus.pr_sigpend, signo)
2647                            ? "yes" : "no");
2648           printf_filtered (" %s\n", safe_strsignal (signo));
2649         }
2650       printf_filtered ("\n");
2651     }
2652 }
2653
2654 static void
2655 info_proc_faults (pip, summary)
2656      struct procinfo *pip;
2657      int summary;
2658 {
2659   struct trans *transp;
2660
2661   if (!summary)
2662     {
2663       if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
2664         {
2665           print_sys_errmsg (pip -> pathname, errno);
2666           error ("PIOCGFAULT failed");
2667         }
2668
2669       printf_filtered ("Current traced hardware fault set:\n\n");
2670       printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
2671
2672       for (transp = faults_table; transp -> name != NULL; transp++)
2673         {
2674           QUIT;
2675           printf_filtered ("\t%-12s ", transp -> name);
2676           printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
2677                            ? "on" : "off");
2678           printf_filtered ("\n");
2679         }
2680       printf_filtered ("\n");
2681     }
2682 }
2683
2684 static void
2685 info_proc_mappings (pip, summary)
2686      struct procinfo *pip;
2687      int summary;
2688 {
2689   int nmap;
2690   struct prmap *prmaps;
2691   struct prmap *prmap;
2692
2693   if (!summary)
2694     {
2695       printf_filtered ("Mapped address spaces:\n\n");
2696       printf_filtered ("\t%10s %10s %10s %10s %7s\n",
2697                        "Start Addr",
2698                        "  End Addr",
2699                        "      Size",
2700                        "    Offset",
2701                        "Flags");
2702       if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
2703         {
2704           prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
2705           if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
2706             {
2707               for (prmap = prmaps; prmap -> pr_size; ++prmap)
2708                 {
2709                   printf_filtered ("\t%#10x %#10x %#10x %#10x %7s\n",
2710                                    prmap -> pr_vaddr,
2711                                    prmap -> pr_vaddr + prmap -> pr_size - 1,
2712                                    prmap -> pr_size,
2713                                    prmap -> pr_off,
2714                                    mappingflags (prmap -> pr_mflags));
2715                 }
2716             }
2717         }
2718       printf_filtered ("\n");
2719     }
2720 }
2721
2722 /*
2723
2724 LOCAL FUNCTION
2725
2726         info_proc -- implement the "info proc" command
2727
2728 SYNOPSIS
2729
2730         void info_proc (char *args, int from_tty)
2731
2732 DESCRIPTION
2733
2734         Implement gdb's "info proc" command by using the /proc interface
2735         to print status information about any currently running process.
2736
2737         Examples of the use of "info proc" are:
2738
2739         info proc               (prints summary info for current inferior)
2740         info proc 123           (prints summary info for process with pid 123)
2741         info proc mappings      (prints address mappings)
2742         info proc times         (prints process/children times)
2743         info proc id            (prints pid, ppid, gid, sid, etc)
2744         info proc status        (prints general process state info)
2745         info proc signals       (prints info about signal handling)
2746         info proc all           (prints all info)
2747
2748  */
2749
2750 static void
2751 info_proc (args, from_tty)
2752      char *args;
2753      int from_tty;
2754 {
2755   int pid;
2756   struct procinfo pii;
2757   struct procinfo *pip;
2758   struct cleanup *old_chain;
2759   char *nexttok;
2760   char **argv;
2761   int argsize;
2762   int summary = 1;
2763   int flags = 0;
2764   int syscalls = 0;
2765   int signals = 0;
2766   int faults = 0;
2767   int mappings = 0;
2768   int times = 0;
2769   int id = 0;
2770   int status = 0;
2771   int all = 0;
2772
2773   old_chain = make_cleanup (null_cleanup, 0);
2774
2775   /* Default to using the current inferior if no pid specified */
2776
2777   pip = &pi;
2778
2779   if (args != NULL)
2780     {
2781       if ((argv = buildargv (args)) == NULL)
2782         {
2783           nomem (0);
2784         }
2785       make_cleanup (freeargv, (char *) argv);
2786
2787       while (*argv != NULL)
2788         {
2789           argsize = strlen (*argv);
2790           if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
2791             {
2792               summary = 0;
2793               all = 1;
2794             }
2795           else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
2796             {
2797               summary = 0;
2798               faults = 1;
2799             }
2800           else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
2801             {
2802               summary = 0;
2803               flags = 1;
2804             }
2805           else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
2806             {
2807               summary = 0;
2808               id = 1;
2809             }
2810           else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
2811             {
2812               summary = 0;
2813               mappings = 1;
2814             }
2815           else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
2816             {
2817               summary = 0;
2818               signals = 1;
2819             }
2820           else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
2821             {
2822               summary = 0;
2823               status = 1;
2824             }
2825           else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
2826             {
2827               summary = 0;
2828               syscalls = 1;
2829             }
2830           else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
2831             {
2832               summary = 0;
2833               times = 1;
2834             }
2835           else if ((pii.pid = atoi (*argv)) > 0)
2836             {
2837               pid = pii.pid;
2838               pip = &pii;
2839               (void) memset (&pii, 0, sizeof (pii));
2840               if (!open_proc_file (pid, pip))
2841                 {
2842                   perror_with_name (pip -> pathname);
2843                   /* NOTREACHED */
2844                 }
2845               make_cleanup (close_proc_file, pip);
2846             }
2847           else if (**argv != '\000')
2848             {
2849               error ("Unrecognized or ambiguous keyword `%s'.", *argv);
2850             }
2851           argv++;
2852         }
2853     }
2854
2855   /* If we don't have a valid open process at this point, then we have no
2856      inferior or didn't specify a specific pid. */
2857
2858   if (!pip -> valid)
2859     {
2860       error ("No process.  Run an inferior or specify an explicit pid.");
2861     }
2862   if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
2863     {
2864       print_sys_errmsg (pip -> pathname, errno);
2865       error ("PIOCSTATUS failed");
2866     }
2867
2868   /* Print verbose information of the requested type(s), or just a summary
2869      of the information for all types. */
2870
2871   printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
2872   if (summary || all || flags)
2873     {
2874       info_proc_flags (pip, summary);
2875     }
2876   if (summary || all)
2877     {
2878       info_proc_stop (pip, summary);
2879     }
2880   if (summary || all || signals || faults)
2881     {
2882       info_proc_siginfo (pip, summary);
2883     }
2884   if (summary || all || syscalls)
2885     {
2886       info_proc_syscalls (pip, summary);
2887     }
2888   if (summary || all || mappings)
2889     {
2890       info_proc_mappings (pip, summary);
2891     }
2892   if (summary || all || signals)
2893     {
2894       info_proc_signals (pip, summary);
2895     }
2896   if (summary || all || faults)
2897     {
2898       info_proc_faults (pip, summary);
2899     }
2900   printf_filtered ("\n");
2901
2902   /* All done, deal with closing any temporary process info structure,
2903      freeing temporary memory , etc. */
2904
2905   do_cleanups (old_chain);
2906 }
2907
2908 /*
2909
2910 GLOBAL FUNCTION
2911
2912         _initialize_proc_fs -- initialize the process file system stuff
2913
2914 SYNOPSIS
2915
2916         void _initialize_proc_fs (void)
2917
2918 DESCRIPTION
2919
2920         Do required initializations during gdb startup for using the
2921         /proc file system interface.
2922
2923 */
2924
2925 static char *proc_desc =
2926 "Show process status information using /proc entry.\n\
2927 Specify process id or use current inferior by default.\n\
2928 Specify keywords for detailed information; default is summary.\n\
2929 Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
2930 `status', `syscalls', and `times'.\n\
2931 Unambiguous abbreviations may be used.";
2932
2933 void
2934 _initialize_proc_fs ()
2935 {
2936   add_info ("proc", info_proc, proc_desc);
2937   init_syscall_table ();
2938 }
2939
2940 #endif  /* USE_PROC_FS */