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