usr.bin/kdump/kdump.c

   1 /*-
   2  * Copyright (c) 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1988, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)kdump.c  8.1 (Berkeley) 6/6/93
  35  * $FreeBSD: src/usr.bin/kdump/kdump.c,v 1.29 2006/05/20 14:27:22 netchild Exp $
  36  */
  37
  38 #define _KERNEL_STRUCTURES
  39
  40 #include <sys/errno.h>
  41 #include <sys/param.h>
  42 #include <sys/time.h>
  43 #include <sys/uio.h>
  44 #include <sys/ktrace.h>
  45 #include <sys/ioctl.h>
  46 #include <sys/ptrace.h>
  47 #include <dlfcn.h>
  48 #include <err.h>
  49 #include <locale.h>
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <string.h>
  53 #include <unistd.h>
  54 #include <vis.h>
  55 #include "ktrace.h"
  56 #include "kdump_subr.h"
  57
  58 extern const char *ioctlname(u_long);
  59
  60 static int      dumpheader(struct ktr_header *);
  61 static int      fread_tail(void *, int, int);
  62 static void     ktrcsw(struct ktr_csw *);
  63 static void     ktrgenio(struct ktr_genio *, int);
  64 static void     ktrnamei(char *, int);
  65 static void     ktrpsig(struct ktr_psig *);
  66 static void     ktrsyscall(struct ktr_syscall *);
  67 static void     ktrsysret(struct ktr_sysret *);
  68 static void     ktruser(int, unsigned char *);
  69 static void     ktruser_malloc(int, unsigned char *);
  70 static void     ktruser_rtld(int, unsigned char *);
  71 static void     timevalfix(struct timeval *);
  72 static void     timevalsub(struct timeval *, struct timeval *);
  73 static void     usage(void);
  74
  75 int timestamp, decimal, fancy = 1, tail, maxdata = 64;
  76 int fixedformat;
  77 int cpustamp;
  78 const char *tracefile = DEF_TRACEFILE;
  79 struct ktr_header ktr_header;
  80
  81 #define eqs(s1, s2)     (strcmp((s1), (s2)) == 0)
  82
  83 int
  84 main(int argc, char **argv)
  85 {
  86         int ch, col, ktrlen, size;
  87         pid_t do_pid = -1;
  88         void *m;
  89         int trpoints = ALL_POINTS;
  90         char *cp;
  91
  92         (void) setlocale(LC_CTYPE, "");
  93
  94         while ((ch = getopt(argc,argv,"acf:djlm:np:RTt:")) != -1)
  95                 switch((char)ch) {
  96                 case 'f':
  97                         tracefile = optarg;
  98                         break;
  99                 case 'j':
 100                         fixedformat = 1;
 101                         break;
 102                 case 'c':
 103                         cpustamp = 1;
 104                         break;
 105                 case 'a':
 106                         timestamp = 2;  /* relative timestamp */
 107                         cpustamp = 1;
 108                         break;
 109                 case 'd':
 110                         decimal = 1;
 111                         break;
 112                 case 'l':
 113                         tail = 1;
 114                         break;
 115                 case 'm':
 116                         maxdata = atoi(optarg);
 117                         break;
 118                 case 'n':
 119                         fancy = 0;
 120                         break;
 121                 case 'p':
 122                         do_pid = strtoul(optarg, &cp, 0);
 123                         if (*cp != 0)
 124                                 errx(1,"invalid number %s", optarg);
 125                         break;
 126                 case 'R':
 127                         timestamp = 2;  /* relative timestamp */
 128                         break;
 129                 case 'T':
 130                         timestamp = 1;
 131                         break;
 132                 case 't':
 133                         trpoints = getpoints(optarg);
 134                         if (trpoints < 0)
 135                                 errx(1, "unknown trace point in %s", optarg);
 136                         break;
 137                 default:
 138                         usage();
 139                 }
 140
 141         if (argc > optind)
 142                 usage();
 143
 144         m = (void *)malloc(size = 1025);
 145         if (m == NULL)
 146                 errx(1, "%s", strerror(ENOMEM));
 147         if (!freopen(tracefile, "r", stdin))
 148                 err(1, "%s", tracefile);
 149         while (fread_tail(&ktr_header, sizeof(struct ktr_header), 1)) {
 150                 if (trpoints & (1 << ktr_header.ktr_type) &&
 151                     (do_pid == -1 || ktr_header.ktr_pid == do_pid))
 152                         col = dumpheader(&ktr_header);
 153                 else
 154                         col = -1;
 155                 if ((ktrlen = ktr_header.ktr_len) < 0)
 156                         errx(1, "bogus length 0x%x", ktrlen);
 157                 if (ktrlen > size) {
 158                         m = (void *)realloc(m, ktrlen+1);
 159                         if (m == NULL)
 160                                 errx(1, "%s", strerror(ENOMEM));
 161                         size = ktrlen;
 162                 }
 163                 if (ktrlen && fread_tail(m, ktrlen, 1) == 0)
 164                         errx(1, "data too short");
 165                 if ((trpoints & (1<<ktr_header.ktr_type)) == 0)
 166                         continue;
 167                 if (col == -1)
 168                         continue;
 169                 switch (ktr_header.ktr_type) {
 170                 case KTR_SYSCALL:
 171                         ktrsyscall((struct ktr_syscall *)m);
 172                         break;
 173                 case KTR_SYSRET:
 174                         ktrsysret((struct ktr_sysret *)m);
 175                         break;
 176                 case KTR_NAMEI:
 177                         ktrnamei(m, ktrlen);
 178                         break;
 179                 case KTR_GENIO:
 180                         ktrgenio((struct ktr_genio *)m, ktrlen);
 181                         break;
 182                 case KTR_PSIG:
 183                         ktrpsig((struct ktr_psig *)m);
 184                         break;
 185                 case KTR_CSW:
 186                         ktrcsw((struct ktr_csw *)m);
 187                         break;
 188                 case KTR_USER:
 189                         ktruser(ktrlen, m);
 190                         break;
 191                 }
 192                 if (tail)
 193                         (void)fflush(stdout);
 194         }
 195         exit(0);
 196 }
 197
 198 static int
 199 fread_tail(void *buf, int size, int num)
 200 {
 201         int i;
 202
 203         while ((i = fread(buf, size, num, stdin)) == 0 && tail) {
 204                 (void)sleep(1);
 205                 clearerr(stdin);
 206         }
 207         return (i);
 208 }
 209
 210 static int
 211 dumpheader(struct ktr_header *kth)
 212 {
 213         static char unknown[64];
 214         static struct timeval prevtime, temp;
 215         const char *type;
 216         int col;
 217
 218         switch (kth->ktr_type) {
 219         case KTR_SYSCALL:
 220                 type = "CALL";
 221                 break;
 222         case KTR_SYSRET:
 223                 type = "RET ";
 224                 break;
 225         case KTR_NAMEI:
 226                 type = "NAMI";
 227                 break;
 228         case KTR_GENIO:
 229                 type = "GIO ";
 230                 break;
 231         case KTR_PSIG:
 232                 type = "PSIG";
 233                 break;
 234         case KTR_CSW:
 235                 type = "CSW";
 236                 break;
 237         case KTR_USER:
 238                 type = "USER";
 239                 break;
 240         default:
 241                 (void)sprintf(unknown, "UNKNOWN(%d)", kth->ktr_type);
 242                 type = unknown;
 243         }
 244
 245         if (kth->ktr_tid || (kth->ktr_flags & KTRH_THREADED) || fixedformat)
 246                 col = printf("%5d:%-4d", kth->ktr_pid, kth->ktr_tid);
 247         else
 248                 col = printf("%5d", kth->ktr_pid);
 249         if (cpustamp)
 250                 col += printf(" %2d", KTRH_CPUID_DECODE(kth->ktr_flags));
 251         col += printf(" %-8.*s ", MAXCOMLEN, kth->ktr_comm);
 252         if (timestamp) {
 253                 if (timestamp == 2) {
 254                         temp = kth->ktr_time;
 255                         timevalsub(&kth->ktr_time, &prevtime);
 256                         prevtime = temp;
 257                 }
 258                 col += printf("%ld.%06ld ",
 259                     kth->ktr_time.tv_sec, kth->ktr_time.tv_usec);
 260         }
 261         col += printf("%s  ", type);
 262         return col;
 263 }
 264
 265 #include <sys/syscall.h>
 266 #define KTRACE
 267 #include <sys/kern/syscalls.c>
 268 #undef KTRACE
 269 int nsyscalls = sizeof (syscallnames) / sizeof (syscallnames[0]);
 270
 271 static const char *ptrace_ops[] = {
 272         "PT_TRACE_ME",  "PT_READ_I",    "PT_READ_D",    "PT_READ_U",
 273         "PT_WRITE_I",   "PT_WRITE_D",   "PT_WRITE_U",   "PT_CONTINUE",
 274         "PT_KILL",      "PT_STEP",      "PT_ATTACH",    "PT_DETACH",
 275 };
 276
 277 static void
 278 ktrsyscall(struct ktr_syscall *ktr)
 279 {
 280         int narg = ktr->ktr_narg;
 281         register_t *ip;
 282
 283         if (ktr->ktr_code >= nsyscalls || ktr->ktr_code < 0)
 284                 (void)printf("[%d]", ktr->ktr_code);
 285         else
 286                 (void)printf("%s", syscallnames[ktr->ktr_code]);
 287         ip = &ktr->ktr_args[0];
 288         if (narg) {
 289                 char c = '(';
 290                 if (fancy) {
 291
 292 #define print_number(i,n,c) do {                      \
 293         if (decimal)                                  \
 294                 (void)printf("%c%ld", c, (long)*i);   \
 295         else                                          \
 296                 (void)printf("%c%#lx", c, (long)*i);  \
 297         i++;                                          \
 298         n--;                                          \
 299         c = ',';                                      \
 300         } while (0);
 301
 302                         if (ktr->ktr_code == SYS_ioctl) {
 303                                 const char *cp;
 304                                 print_number(ip,narg,c);
 305                                 if ((cp = ioctlname(*ip)) != NULL)
 306                                         (void)printf(",%s", cp);
 307                                 else {
 308                                         if (decimal)
 309                                                 (void)printf(",%ld", (long)*ip);
 310                                         else
 311                                                 (void)printf(",%#lx ", (long)*ip);
 312                                 }
 313                                 c = ',';
 314                                 ip++;
 315                                 narg--;
 316                         } else if (ktr->ktr_code == SYS_access) {
 317                                 print_number(ip,narg,c);
 318                                 (void)putchar(',');
 319                                 accessmodename ((int)*ip);
 320                                 ip++;
 321                                 narg--;
 322                         } else if (ktr->ktr_code == SYS_open ||
 323                                    ktr->ktr_code == SYS_mq_open) {
 324                                 int     flags;
 325                                 int     mode;
 326                                 print_number(ip,narg,c);
 327                                 flags = *ip;
 328                                 mode = *++ip;
 329                                 (void)putchar(',');
 330                                 flagsandmodename (flags, mode, decimal);
 331                                 ip++;
 332                                 narg-=2;
 333                         } else if (ktr->ktr_code == SYS_wait4) {
 334                                 print_number(ip,narg,c);
 335                                 print_number(ip,narg,c);
 336                                 (void)putchar(',');
 337                                 wait4optname ((int)*ip);
 338                                 ip++;
 339                                 narg--;
 340                         } else if (ktr->ktr_code == SYS_chmod ||
 341                                    ktr->ktr_code == SYS_fchmod ||
 342                                    ktr->ktr_code == SYS_lchmod) {
 343                                 print_number(ip,narg,c);
 344                                 (void)putchar(',');
 345                                 modename ((int)*ip);
 346                                 ip++;
 347                                 narg--;
 348                         } else if (ktr->ktr_code == SYS_mknod) {
 349                                 print_number(ip,narg,c);
 350                                 (void)putchar(',');
 351                                 modename ((int)*ip);
 352                                 ip++;
 353                                 narg--;
 354                         } else if (ktr->ktr_code == SYS_getfsstat) {
 355                                 print_number(ip,narg,c);
 356                                 print_number(ip,narg,c);
 357                                 (void)putchar(',');
 358                                 getfsstatflagsname ((int)*ip);
 359                                 ip++;
 360                                 narg--;
 361                         } else if (ktr->ktr_code == SYS_mount) {
 362                                 print_number(ip,narg,c);
 363                                 print_number(ip,narg,c);
 364                                 (void)putchar(',');
 365                                 mountflagsname ((int)*ip);
 366                                 ip++;
 367                                 narg--;
 368                         } else if (ktr->ktr_code == SYS_unmount) {
 369                                 print_number(ip,narg,c);
 370                                 (void)putchar(',');
 371                                 mountflagsname ((int)*ip);
 372                                 ip++;
 373                                 narg--;
 374                         } else if (ktr->ktr_code == SYS_recvmsg ||
 375                                    ktr->ktr_code == SYS_sendmsg) {
 376                                 print_number(ip,narg,c);
 377                                 print_number(ip,narg,c);
 378                                 (void)putchar(',');
 379                                 sendrecvflagsname ((int)*ip);
 380                                 ip++;
 381                                 narg--;
 382                         } else if (ktr->ktr_code == SYS_recvfrom ||
 383                                    ktr->ktr_code == SYS_sendto) {
 384                                 print_number(ip,narg,c);
 385                                 print_number(ip,narg,c);
 386                                 print_number(ip,narg,c);
 387                                 (void)putchar(',');
 388                                 sendrecvflagsname ((int)*ip);
 389                                 ip++;
 390                                 narg--;
 391                         } else if (ktr->ktr_code == SYS_chflags ||
 392                                    ktr->ktr_code == SYS_fchflags) {
 393                                 print_number(ip,narg,c);
 394                                 (void)putchar(',');
 395                                 modename((int)*ip);
 396                                 ip++;
 397                                 narg--;
 398                         } else if (ktr->ktr_code == SYS_kill) {
 399                                 print_number(ip,narg,c);
 400                                 (void)putchar(',');
 401                                 signame((int)*ip);
 402                                 ip++;
 403                                 narg--;
 404                         } else if (ktr->ktr_code == SYS_reboot) {
 405                                 (void)putchar('(');
 406                                 rebootoptname((int)*ip);
 407                                 ip++;
 408                                 narg--;
 409                         } else if (ktr->ktr_code == SYS_umask) {
 410                                 (void)putchar('(');
 411                                 modename((int)*ip);
 412                                 ip++;
 413                                 narg--;
 414                         } else if (ktr->ktr_code == SYS_msync) {
 415                                 print_number(ip,narg,c);
 416                                 print_number(ip,narg,c);
 417                                 (void)putchar(',');
 418                                 msyncflagsname((int)*ip);
 419                                 ip++;
 420                                 narg--;
 421                         } else if (ktr->ktr_code == SYS_mmap) {
 422                                 print_number(ip,narg,c);
 423                                 print_number(ip,narg,c);
 424                                 (void)putchar(',');
 425                                 mmapprotname ((int)*ip);
 426                                 (void)putchar(',');
 427                                 ip++;
 428                                 narg--;
 429                                 mmapflagsname ((int)*ip);
 430                                 ip++;
 431                                 narg--;
 432                         } else if (ktr->ktr_code == SYS_mprotect) {
 433                                 print_number(ip,narg,c);
 434                                 print_number(ip,narg,c);
 435                                 (void)putchar(',');
 436                                 mmapprotname ((int)*ip);
 437                                 ip++;
 438                                 narg--;
 439                         } else if (ktr->ktr_code == SYS_madvise) {
 440                                 print_number(ip,narg,c);
 441                                 print_number(ip,narg,c);
 442                                 (void)putchar(',');
 443                                 madvisebehavname((int)*ip);
 444                                 ip++;
 445                                 narg--;
 446                         } else if (ktr->ktr_code == SYS_setpriority) {
 447                                 (void)putchar('(');
 448                                 prioname((int)*ip);
 449                                 ip++;
 450                                 narg--;
 451                                 c = ',';
 452                                 print_number(ip,narg,c);
 453                                 print_number(ip,narg,c);
 454                         } else if (ktr->ktr_code == SYS_fcntl) {
 455                                 int cmd;
 456                                 int arg;
 457                                 print_number(ip,narg,c);
 458                                 cmd = *ip;
 459                                 arg = *++ip;
 460                                 (void)putchar(',');
 461                                 fcntlcmdname(cmd, arg, decimal);
 462                                 ip++;
 463                                 narg-=2;
 464                         } else if (ktr->ktr_code == SYS_socket) {
 465                                 (void)putchar('(');
 466                                 sockdomainname((int)*ip);
 467                                 ip++;
 468                                 narg--;
 469                                 (void)putchar(',');
 470                                 socktypename((int)*ip);
 471                                 ip++;
 472                                 narg--;
 473                                 c = ',';
 474                         } else if (ktr->ktr_code == SYS_setsockopt ||
 475                                    ktr->ktr_code == SYS_getsockopt) {
 476                                 print_number(ip,narg,c);
 477                                 (void)putchar(',');
 478                                 sockoptlevelname((int)*ip, decimal);
 479                                 ip++;
 480                                 narg--;
 481                                 (void)putchar(',');
 482                                 sockoptname((int)*ip);
 483                                 ip++;
 484                                 narg--;
 485                         } else if (ktr->ktr_code == SYS_lseek) {
 486                                 print_number(ip,narg,c);
 487                                 /* Hidden 'pad' argument, not in lseek(2) */
 488                                 print_number(ip,narg,c);
 489                                 print_number(ip,narg,c);
 490                                 (void)putchar(',');
 491                                 whencename ((int)*ip);
 492                                 ip++;
 493                                 narg--;
 494                         } else if (ktr->ktr_code == SYS_flock) {
 495                                 print_number(ip,narg,c);
 496                                 (void)putchar(',');
 497                                 flockname((int)*ip);
 498                                 ip++;
 499                                 narg--;
 500                         } else if (ktr->ktr_code == SYS_mkfifo ||
 501                                    ktr->ktr_code == SYS_mkdir) {
 502                                 print_number(ip,narg,c);
 503                                 (void)putchar(',');
 504                                 modename((int)*ip);
 505                                 ip++;
 506                                 narg--;
 507                         } else if (ktr->ktr_code == SYS_shutdown) {
 508                                 print_number(ip,narg,c);
 509                                 (void)putchar(',');
 510                                 shutdownhowname((int)*ip);
 511                                 ip++;
 512                                 narg--;
 513                         } else if (ktr->ktr_code == SYS_socketpair) {
 514                                 (void)putchar('(');
 515                                 sockdomainname((int)*ip);
 516                                 ip++;
 517                                 narg--;
 518                                 (void)putchar(',');
 519                                 socktypename((int)*ip);
 520                                 ip++;
 521                                 narg--;
 522                                 c = ',';
 523                         } else if (ktr->ktr_code == SYS_getrlimit ||
 524                                    ktr->ktr_code == SYS_setrlimit) {
 525                                 (void)putchar('(');
 526                                 rlimitname((int)*ip);
 527                                 ip++;
 528                                 narg--;
 529                                 c = ',';
 530                         } else if (ktr->ktr_code == SYS_quotactl) {
 531                                 print_number(ip,narg,c);
 532                                 quotactlname((int)*ip);
 533                                 ip++;
 534                                 narg--;
 535                                 c = ',';
 536                         } else if (ktr->ktr_code == SYS_rtprio) {
 537                                 (void)putchar('(');
 538                                 rtprioname((int)*ip);
 539                                 ip++;
 540                                 narg--;
 541                                 c = ',';
 542                         } else if (ktr->ktr_code == SYS___semctl) {
 543                                 print_number(ip,narg,c);
 544                                 print_number(ip,narg,c);
 545                                 semctlname((int)*ip);
 546                                 ip++;
 547                                 narg--;
 548                         } else if (ktr->ktr_code == SYS_semget) {
 549                                 print_number(ip,narg,c);
 550                                 print_number(ip,narg,c);
 551                                 semgetname((int)*ip);
 552                                 ip++;
 553                                 narg--;
 554                         } else if (ktr->ktr_code == SYS_msgctl) {
 555                                 print_number(ip,narg,c);
 556                                 shmctlname((int)*ip);
 557                                 ip++;
 558                                 narg--;
 559                         } else if (ktr->ktr_code == SYS_shmat) {
 560                                 print_number(ip,narg,c);
 561                                 print_number(ip,narg,c);
 562                                 shmatname((int)*ip);
 563                                 ip++;
 564                                 narg--;
 565                         } else if (ktr->ktr_code == SYS_shmctl) {
 566                                 print_number(ip,narg,c);
 567                                 shmctlname((int)*ip);
 568                                 ip++;
 569                                 narg--;
 570                         } else if (ktr->ktr_code == SYS_minherit) {
 571                                 print_number(ip,narg,c);
 572                                 print_number(ip,narg,c);
 573                                 minheritname((int)*ip);
 574                                 ip++;
 575                                 narg--;
 576                         } else if (ktr->ktr_code == SYS_rfork) {
 577                                 (void)putchar('(');
 578                                 rforkname((int)*ip);
 579                                 ip++;
 580                                 narg--;
 581                                 c = ',';
 582                         } else if (ktr->ktr_code == SYS_lio_listio) {
 583                                 (void)putchar('(');
 584                                 lio_listioname((int)*ip);
 585                                 ip++;
 586                                 narg--;
 587                                 c = ',';
 588                         } else if (ktr->ktr_code == SYS_mlockall) {
 589                                 (void)putchar('(');
 590                                 mlockallname((int)*ip);
 591                                 ip++;
 592                                 narg--;
 593                         } else if (ktr->ktr_code == SYS_sched_setscheduler) {
 594                                 print_number(ip,narg,c);
 595                                 schedpolicyname((int)*ip);
 596                                 ip++;
 597                                 narg--;
 598                         } else if (ktr->ktr_code == SYS_sched_get_priority_max ||
 599                                    ktr->ktr_code == SYS_sched_get_priority_min) {
 600                                 (void)putchar('(');
 601                                 schedpolicyname((int)*ip);
 602                                 ip++;
 603                                 narg--;
 604                         } else if (ktr->ktr_code == SYS_sendfile) {
 605                                 print_number(ip,narg,c);
 606                                 print_number(ip,narg,c);
 607                                 print_number(ip,narg,c);
 608                                 print_number(ip,narg,c);
 609                                 print_number(ip,narg,c);
 610                                 print_number(ip,narg,c);
 611                                 sendfileflagsname((int)*ip);
 612                                 ip++;
 613                                 narg--;
 614                         } else if (ktr->ktr_code == SYS_kldsym) {
 615                                 print_number(ip,narg,c);
 616                                 kldsymcmdname((int)*ip);
 617                                 ip++;
 618                                 narg--;
 619                         } else if (ktr->ktr_code == SYS_sigprocmask) {
 620                                 (void)putchar('(');
 621                                 sigprocmaskhowname((int)*ip);
 622                                 ip++;
 623                                 narg--;
 624                                 c = ',';
 625                         } else if (ktr->ktr_code == SYS___acl_get_file ||
 626                                    ktr->ktr_code == SYS___acl_set_file ||
 627                                    ktr->ktr_code == SYS___acl_get_fd ||
 628                                    ktr->ktr_code == SYS___acl_set_fd ||
 629                                    ktr->ktr_code == SYS___acl_delete_file ||
 630                                    ktr->ktr_code == SYS___acl_delete_fd ||
 631                                    ktr->ktr_code == SYS___acl_aclcheck_file ||
 632                                    ktr->ktr_code == SYS___acl_aclcheck_fd) {
 633                                 print_number(ip,narg,c);
 634                                 acltypename((int)*ip);
 635                                 ip++;
 636                                 narg--;
 637                         } else if (ktr->ktr_code == SYS_sigaction) {
 638                                 (void)putchar('(');
 639                                 signame((int)*ip);
 640                                 ip++;
 641                                 narg--;
 642                                 c = ',';
 643                         } else if (ktr->ktr_code == SYS_extattrctl) {
 644                                 print_number(ip,narg,c);
 645                                 extattrctlname((int)*ip);
 646                                 ip++;
 647                                 narg--;
 648                         } else if (ktr->ktr_code == SYS_ptrace) {
 649                                 if (*ip < (register_t)(sizeof(ptrace_ops) /
 650                                     sizeof(ptrace_ops[0])) && *ip >= 0)
 651                                         (void)printf("(%s", ptrace_ops[*ip]);
 652 #ifdef PT_GETREGS
 653                                 else if (*ip == PT_GETREGS)
 654                                         (void)printf("(%s", "PT_GETREGS");
 655 #endif
 656 #ifdef PT_SETREGS
 657                                 else if (*ip == PT_SETREGS)
 658                                         (void)printf("(%s", "PT_SETREGS");
 659 #endif
 660 #ifdef PT_GETFPREGS
 661                                 else if (*ip == PT_GETFPREGS)
 662                                         (void)printf("(%s", "PT_GETFPREGS");
 663 #endif
 664 #ifdef PT_SETFPREGS
 665                                 else if (*ip == PT_SETFPREGS)
 666                                         (void)printf("(%s", "PT_SETFPREGS");
 667 #endif
 668 #ifdef PT_GETDBREGS
 669                                 else if (*ip == PT_GETDBREGS)
 670                                         (void)printf("(%s", "PT_GETDBREGS");
 671 #endif
 672 #ifdef PT_SETDBREGS
 673                                 else if (*ip == PT_SETDBREGS)
 674                                         (void)printf("(%s", "PT_SETDBREGS");
 675 #endif
 676                                 else
 677                                         (void)printf("(%ld", (long)*ip);
 678                                 c = ',';
 679                                 ip++;
 680                                 narg--;
 681                         }
 682                 }
 683                 while (narg > 0) {
 684                         print_number(ip,narg,c);
 685                 }
 686                 (void)putchar(')');
 687         }
 688         (void)putchar('\n');
 689 }
 690
 691 static void
 692 ktrsysret(struct ktr_sysret *ktr)
 693 {
 694         register_t ret = ktr->ktr_retval;
 695         int error = ktr->ktr_error;
 696         int code = ktr->ktr_code;
 697
 698         if (code >= nsyscalls || code < 0)
 699                 (void)printf("[%d] ", code);
 700         else
 701                 (void)printf("%s ", syscallnames[code]);
 702
 703         if (error == 0) {
 704                 if (fancy) {
 705                         (void)printf("%ld", (long)ret);
 706                         if (ret < 0 || ret > 9)
 707                                 (void)printf("/%#lx", (long)ret);
 708                 } else {
 709                         if (decimal)
 710                                 (void)printf("%ld", (long)ret);
 711                         else
 712                                 (void)printf("%#lx", (long)ret);
 713                 }
 714         } else if (error == ERESTART)
 715                 (void)printf("RESTART");
 716         else if (error == EJUSTRETURN)
 717                 (void)printf("JUSTRETURN");
 718         else {
 719                 (void)printf("-1 errno %d", ktr->ktr_error);
 720                 if (fancy)
 721                         (void)printf(" %s", strerror(ktr->ktr_error));
 722         }
 723         (void)putchar('\n');
 724 }
 725
 726 static void
 727 ktrnamei(char *cp, int len)
 728 {
 729         (void)printf("\"%.*s\"\n", len, cp);
 730 }
 731
 732 static void
 733 ktrgenio(struct ktr_genio *ktr, int len)
 734 {
 735         int datalen = len - sizeof (struct ktr_genio);
 736         char *dp = (char *)ktr + sizeof (struct ktr_genio);
 737         char *cp;
 738         int col = 0;
 739         int width;
 740         char visbuf[5];
 741         static int screenwidth = 0;
 742
 743         if (screenwidth == 0) {
 744                 struct winsize ws;
 745
 746                 if (fancy && ioctl(fileno(stderr), TIOCGWINSZ, &ws) != -1 &&
 747                     ws.ws_col > 8)
 748                         screenwidth = ws.ws_col;
 749                 else
 750                         screenwidth = 80;
 751         }
 752         printf("fd %d %s %d byte%s\n", ktr->ktr_fd,
 753                 ktr->ktr_rw == UIO_READ ? "read" : "wrote", datalen,
 754                 datalen == 1 ? "" : "s");
 755         if (maxdata && datalen > maxdata)
 756                 datalen = maxdata;
 757         (void)printf("       \"");
 758         col = 8;
 759         for (;datalen > 0; datalen--, dp++) {
 760                 (void) vis(visbuf, *dp, VIS_CSTYLE, *(dp+1));
 761                 cp = visbuf;
 762                 /*
 763                  * Keep track of printables and
 764                  * space chars (like fold(1)).
 765                  */
 766                 if (col == 0) {
 767                         (void)putchar('\t');
 768                         col = 8;
 769                 }
 770                 switch(*cp) {
 771                 case '\n':
 772                         col = 0;
 773                         (void)putchar('\n');
 774                         continue;
 775                 case '\t':
 776                         width = 8 - (col&07);
 777                         break;
 778                 default:
 779                         width = strlen(cp);
 780                 }
 781                 if (col + width > (screenwidth-2)) {
 782                         (void)printf("\\\n\t");
 783                         col = 8;
 784                 }
 785                 col += width;
 786                 do {
 787                         (void)putchar(*cp++);
 788                 } while (*cp);
 789         }
 790         if (col == 0)
 791                 (void)printf("       ");
 792         (void)printf("\"\n");
 793 }
 794
 795 const char *signames[NSIG] = {
 796         "NULL", "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT",     /*  1 - 6  */
 797         "EMT", "FPE", "KILL", "BUS", "SEGV", "SYS",             /*  7 - 12 */
 798         "PIPE", "ALRM",  "TERM", "URG", "STOP", "TSTP",         /* 13 - 18 */
 799         "CONT", "CHLD", "TTIN", "TTOU", "IO", "XCPU",           /* 19 - 24 */
 800         "XFSZ", "VTALRM", "PROF", "WINCH", "29", "USR1",        /* 25 - 30 */
 801         "USR2", NULL,                                           /* 31 - 32 */
 802 };
 803
 804 static void
 805 ktrpsig(struct ktr_psig *psig)
 806 {
 807         (void)printf("SIG%s ", signames[psig->signo]);
 808         if (psig->action == SIG_DFL)
 809                 (void)printf("SIG_DFL\n");
 810         else
 811                 (void)printf("caught handler=0x%lx mask=0x%x code=0x%x\n",
 812                     (u_long)psig->action, psig->mask.__bits[0], psig->code);
 813 }
 814
 815 static void
 816 ktrcsw(struct ktr_csw *cs)
 817 {
 818         (void)printf("%s %s\n", cs->out ? "stop" : "resume",
 819                 cs->user ? "user" : "kernel");
 820 }
 821
 822 #define UTRACE_DLOPEN_START             1
 823 #define UTRACE_DLOPEN_STOP              2
 824 #define UTRACE_DLCLOSE_START            3
 825 #define UTRACE_DLCLOSE_STOP             4
 826 #define UTRACE_LOAD_OBJECT              5
 827 #define UTRACE_UNLOAD_OBJECT            6
 828 #define UTRACE_ADD_RUNDEP               7
 829 #define UTRACE_PRELOAD_FINISHED         8
 830 #define UTRACE_INIT_CALL                9
 831 #define UTRACE_FINI_CALL                10
 832
 833 struct utrace_rtld {
 834         char sig[4];                            /* 'RTLD' */
 835         int event;
 836         void *handle;
 837         void *mapbase;
 838         size_t mapsize;
 839         int refcnt;
 840         char name[MAXPATHLEN];
 841 };
 842
 843 static void
 844 ktruser_rtld(int len, unsigned char *p)
 845 {
 846         struct utrace_rtld *ut = (struct utrace_rtld *)p;
 847         void *parent;
 848         int mode;
 849
 850         switch (ut->event) {
 851         case UTRACE_DLOPEN_START:
 852                 mode = ut->refcnt;
 853                 printf("dlopen(%s, ", ut->name);
 854                 switch (mode & RTLD_MODEMASK) {
 855                 case RTLD_NOW:
 856                         printf("RTLD_NOW");
 857                         break;
 858                 case RTLD_LAZY:
 859                         printf("RTLD_LAZY");
 860                         break;
 861                 default:
 862                         printf("%#x", mode & RTLD_MODEMASK);
 863                 }
 864                 if (mode & RTLD_GLOBAL)
 865                         printf(" | RTLD_GLOBAL");
 866                 if (mode & RTLD_TRACE)
 867                         printf(" | RTLD_TRACE");
 868                 if (mode & ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE))
 869                         printf(" | %#x", mode &
 870                             ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE));
 871                 printf(")\n");
 872                 break;
 873         case UTRACE_DLOPEN_STOP:
 874                 printf("%p = dlopen(%s) ref %d\n", ut->handle, ut->name,
 875                     ut->refcnt);
 876                 break;
 877         case UTRACE_DLCLOSE_START:
 878                 printf("dlclose(%p) (%s, %d)\n", ut->handle, ut->name,
 879                     ut->refcnt);
 880                 break;
 881         case UTRACE_DLCLOSE_STOP:
 882                 printf("dlclose(%p) finished\n", ut->handle);
 883                 break;
 884         case UTRACE_LOAD_OBJECT:
 885                 printf("RTLD: loaded   %p @ %p - %p (%s)\n", ut->handle,
 886                     ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1,
 887                     ut->name);
 888                 break;
 889         case UTRACE_UNLOAD_OBJECT:
 890                 printf("RTLD: unloaded %p @ %p - %p (%s)\n", ut->handle,
 891                     ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1,
 892                     ut->name);
 893                 break;
 894         case UTRACE_ADD_RUNDEP:
 895                 parent = ut->mapbase;
 896                 printf("RTLD: %p now depends on %p (%s, %d)\n", parent,
 897                     ut->handle, ut->name, ut->refcnt);
 898                 break;
 899         case UTRACE_PRELOAD_FINISHED:
 900                 printf("RTLD: LD_PRELOAD finished\n");
 901                 break;
 902         case UTRACE_INIT_CALL:
 903                 printf("RTLD: init %p for %p (%s)\n", ut->mapbase, ut->handle,
 904                     ut->name);
 905                 break;
 906         case UTRACE_FINI_CALL:
 907                 printf("RTLD: fini %p for %p (%s)\n", ut->mapbase, ut->handle,
 908                     ut->name);
 909                 break;
 910         default:
 911                 p += 4;
 912                 len -= 4;
 913                 printf("RTLD: %d ", len);
 914                 while (len--)
 915                         if (decimal)
 916                                 printf(" %d", *p++);
 917                         else
 918                                 printf(" %02x", *p++);
 919                 printf("\n");
 920         }
 921 }
 922
 923 struct utrace_malloc {
 924         void *p;
 925         size_t s;
 926         void *r;
 927 };
 928
 929 static void
 930 ktruser_malloc(int len __unused, unsigned char *p)
 931 {
 932         struct utrace_malloc *ut = (struct utrace_malloc *)p;
 933
 934         if (ut->p == NULL) {
 935                 if (ut->s == 0 && ut->r == NULL)
 936                         printf("malloc_init()\n");
 937                 else
 938                         printf("%p = malloc(%zu)\n", ut->r, ut->s);
 939         } else {
 940                 if (ut->s == 0)
 941                         printf("free(%p)\n", ut->p);
 942                 else
 943                         printf("%p = realloc(%p, %zu)\n", ut->r, ut->p, ut->s);
 944         }
 945 }
 946
 947 static void
 948 ktruser(int len, unsigned char *p)
 949 {
 950
 951         if (len >= 8 && bcmp(p, "RTLD", 4) == 0) {
 952                 ktruser_rtld(len, p);
 953                 return;
 954         }
 955
 956         if (len == sizeof(struct utrace_malloc)) {
 957                 ktruser_malloc(len, p);
 958                 return;
 959         }
 960
 961         (void)printf("%d ", len);
 962         while (len--)
 963                 (void)printf(" %02x", *p++);
 964         (void)printf("\n");
 965 }
 966
 967 static void
 968 usage(void)
 969 {
 970         (void)fprintf(stderr,
 971             "usage: kdump [-dnlRT] [-f trfile] [-m maxdata] [-t [cnisuw]] [-p pid]\n");
 972         exit(1);
 973 }
 974
 975 static void
 976 timevalsub(struct timeval *t1, struct timeval *t2)
 977 {
 978         t1->tv_sec -= t2->tv_sec;
 979         t1->tv_usec -= t2->tv_usec;
 980         timevalfix(t1);
 981 }
 982
 983 static void
 984 timevalfix(struct timeval *t1)
 985 {
 986         if (t1->tv_usec < 0) {
 987                 t1->tv_sec--;
 988                 t1->tv_usec += 1000000;
 989         }
 990         if (t1->tv_usec >= 1000000) {
 991                 t1->tv_sec++;
 992                 t1->tv_usec -= 1000000;
 993         }
 994 }