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
  34 #ifndef lint
  35 static const char copyright[] =
  36 "@(#) Copyright (c) 1988, 1993\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)kdump.c     8.1 (Berkeley) 6/6/93";
  43 #endif
  44 #endif /* not lint */
  45 #include <sys/cdefs.h>
  46 __FBSDID("$FreeBSD$");
  47
  48 #define _KERNEL
  49 extern int errno;
  50 #include <sys/errno.h>
  51 #undef _KERNEL
  52 #include <sys/param.h>
  53 #include <sys/errno.h>
  54 #define _KERNEL
  55 #include <sys/time.h>
  56 #undef _KERNEL
  57 #include <sys/uio.h>
  58 #include <sys/ktrace.h>
  59 #include <sys/ioctl.h>
  60 #include <sys/socket.h>
  61 #include <dlfcn.h>
  62 #include <err.h>
  63 #include <locale.h>
  64 #include <stdio.h>
  65 #include <stdlib.h>
  66 #include <string.h>
  67 #include <unistd.h>
  68 #include <vis.h>
  69 #include "ktrace.h"
  70 #include "kdump_subr.h"
  71
  72 int fread_tail(void *, int, int);
  73 void dumpheader(struct ktr_header *);
  74 void ktrsyscall(struct ktr_syscall *);
  75 void ktrsysret(struct ktr_sysret *);
  76 void ktrnamei(char *, int);
  77 void hexdump(char *, int, int);
  78 void visdump(char *, int, int);
  79 void ktrgenio(struct ktr_genio *, int);
  80 void ktrpsig(struct ktr_psig *);
  81 void ktrcsw(struct ktr_csw *);
  82 void ktruser(int, unsigned char *);
  83 void usage(void);
  84 const char *ioctlname(u_long);
  85
  86 int timestamp, decimal, fancy = 1, suppressdata, tail, threads, maxdata;
  87 const char *tracefile = DEF_TRACEFILE;
  88 struct ktr_header ktr_header;
  89
  90 #define eqs(s1, s2)     (strcmp((s1), (s2)) == 0)
  91
  92 int
  93 main(int argc, char *argv[])
  94 {
  95         int ch, ktrlen, size;
  96         void *m;
  97         int trpoints = ALL_POINTS;
  98         int drop_logged;
  99         pid_t pid = 0;
 100
 101         (void) setlocale(LC_CTYPE, "");
 102
 103         while ((ch = getopt(argc,argv,"f:dElm:np:HRsTt:")) != -1)
 104                 switch((char)ch) {
 105                 case 'f':
 106                         tracefile = optarg;
 107                         break;
 108                 case 'd':
 109                         decimal = 1;
 110                         break;
 111                 case 'l':
 112                         tail = 1;
 113                         break;
 114                 case 'm':
 115                         maxdata = atoi(optarg);
 116                         break;
 117                 case 'n':
 118                         fancy = 0;
 119                         break;
 120                 case 'p':
 121                         pid = atoi(optarg);
 122                         break;
 123                 case 's':
 124                         suppressdata = 1;
 125                         break;
 126                 case 'E':
 127                         timestamp = 3;  /* elapsed timestamp */
 128                         break;
 129                 case 'H':
 130                         threads = 1;
 131                         break;
 132                 case 'R':
 133                         timestamp = 2;  /* relative timestamp */
 134                         break;
 135                 case 'T':
 136                         timestamp = 1;
 137                         break;
 138                 case 't':
 139                         trpoints = getpoints(optarg);
 140                         if (trpoints < 0)
 141                                 errx(1, "unknown trace point in %s", optarg);
 142                         break;
 143                 default:
 144                         usage();
 145                 }
 146
 147         if (argc > optind)
 148                 usage();
 149
 150         m = (void *)malloc(size = 1025);
 151         if (m == NULL)
 152                 errx(1, "%s", strerror(ENOMEM));
 153         if (!freopen(tracefile, "r", stdin))
 154                 err(1, "%s", tracefile);
 155         drop_logged = 0;
 156         while (fread_tail(&ktr_header, sizeof(struct ktr_header), 1)) {
 157                 if (ktr_header.ktr_type & KTR_DROP) {
 158                         ktr_header.ktr_type &= ~KTR_DROP;
 159                         if (!drop_logged && threads) {
 160                                 (void)printf("%6d %6d %-8.*s Events dropped.\n",
 161                                     ktr_header.ktr_pid, ktr_header.ktr_tid >
 162                                     0 ? ktr_header.ktr_tid : 0, MAXCOMLEN,
 163                                     ktr_header.ktr_comm);
 164                                 drop_logged = 1;
 165                         } else if (!drop_logged) {
 166                                 (void)printf("%6d %-8.*s Events dropped.\n",
 167                                     ktr_header.ktr_pid, MAXCOMLEN,
 168                                     ktr_header.ktr_comm);
 169                                 drop_logged = 1;
 170                         }
 171                 }
 172                 if (trpoints & (1<<ktr_header.ktr_type))
 173                         if (pid == 0 || ktr_header.ktr_pid == pid)
 174                                 dumpheader(&ktr_header);
 175                 if ((ktrlen = ktr_header.ktr_len) < 0)
 176                         errx(1, "bogus length 0x%x", ktrlen);
 177                 if (ktrlen > size) {
 178                         m = (void *)realloc(m, ktrlen+1);
 179                         if (m == NULL)
 180                                 errx(1, "%s", strerror(ENOMEM));
 181                         size = ktrlen;
 182                 }
 183                 if (ktrlen && fread_tail(m, ktrlen, 1) == 0)
 184                         errx(1, "data too short");
 185                 if (pid && ktr_header.ktr_pid != pid)
 186                         continue;
 187                 if ((trpoints & (1<<ktr_header.ktr_type)) == 0)
 188                         continue;
 189                 drop_logged = 0;
 190                 switch (ktr_header.ktr_type) {
 191                 case KTR_SYSCALL:
 192                         ktrsyscall((struct ktr_syscall *)m);
 193                         break;
 194                 case KTR_SYSRET:
 195                         ktrsysret((struct ktr_sysret *)m);
 196                         break;
 197                 case KTR_NAMEI:
 198                         ktrnamei(m, ktrlen);
 199                         break;
 200                 case KTR_GENIO:
 201                         ktrgenio((struct ktr_genio *)m, ktrlen);
 202                         break;
 203                 case KTR_PSIG:
 204                         ktrpsig((struct ktr_psig *)m);
 205                         break;
 206                 case KTR_CSW:
 207                         ktrcsw((struct ktr_csw *)m);
 208                         break;
 209                 case KTR_USER:
 210                         ktruser(ktrlen, m);
 211                         break;
 212                 default:
 213                         printf("\n");
 214                         break;
 215                 }
 216                 if (tail)
 217                         (void)fflush(stdout);
 218         }
 219         return 0;
 220 }
 221
 222 int
 223 fread_tail(void *buf, int size, int num)
 224 {
 225         int i;
 226
 227         while ((i = fread(buf, size, num, stdin)) == 0 && tail) {
 228                 (void)sleep(1);
 229                 clearerr(stdin);
 230         }
 231         return (i);
 232 }
 233
 234 void
 235 dumpheader(struct ktr_header *kth)
 236 {
 237         static char unknown[64];
 238         static struct timeval prevtime, temp;
 239         const char *type;
 240
 241         switch (kth->ktr_type) {
 242         case KTR_SYSCALL:
 243                 type = "CALL";
 244                 break;
 245         case KTR_SYSRET:
 246                 type = "RET ";
 247                 break;
 248         case KTR_NAMEI:
 249                 type = "NAMI";
 250                 break;
 251         case KTR_GENIO:
 252                 type = "GIO ";
 253                 break;
 254         case KTR_PSIG:
 255                 type = "PSIG";
 256                 break;
 257         case KTR_CSW:
 258                 type = "CSW ";
 259                 break;
 260         case KTR_USER:
 261                 type = "USER";
 262                 break;
 263         default:
 264                 (void)sprintf(unknown, "UNKNOWN(%d)", kth->ktr_type);
 265                 type = unknown;
 266         }
 267
 268         /*
 269          * The ktr_tid field was previously the ktr_buffer field, which held
 270          * the kernel pointer value for the buffer associated with data
 271          * following the record header.  It now holds a threadid, but only
 272          * for trace files after the change.  Older trace files still contain
 273          * kernel pointers.  Detect this and suppress the results by printing
 274          * negative tid's as 0.
 275          */
 276         if (threads)
 277                 (void)printf("%6d %6d %-8.*s ", kth->ktr_pid, kth->ktr_tid >
 278                     0 ? kth->ktr_tid : 0, MAXCOMLEN, kth->ktr_comm);
 279         else
 280                 (void)printf("%6d %-8.*s ", kth->ktr_pid, MAXCOMLEN,
 281                     kth->ktr_comm);
 282         if (timestamp) {
 283                 if (timestamp == 3) {
 284                         if (prevtime.tv_sec == 0)
 285                                 prevtime = kth->ktr_time;
 286                         timevalsub(&kth->ktr_time, &prevtime);
 287                 }
 288                 if (timestamp == 2) {
 289                         temp = kth->ktr_time;
 290                         timevalsub(&kth->ktr_time, &prevtime);
 291                         prevtime = temp;
 292                 }
 293                 (void)printf("%ld.%06ld ",
 294                     kth->ktr_time.tv_sec, kth->ktr_time.tv_usec);
 295         }
 296         (void)printf("%s  ", type);
 297 }
 298
 299 #include <sys/syscall.h>
 300 #define KTRACE
 301 #include <sys/kern/syscalls.c>
 302 #undef KTRACE
 303 int nsyscalls = sizeof (syscallnames) / sizeof (syscallnames[0]);
 304
 305 void
 306 ktrsyscall(struct ktr_syscall *ktr)
 307 {
 308         int narg = ktr->ktr_narg;
 309         register_t *ip;
 310
 311         if (ktr->ktr_code >= nsyscalls || ktr->ktr_code < 0)
 312                 (void)printf("[%d]", ktr->ktr_code);
 313         else
 314                 (void)printf("%s", syscallnames[ktr->ktr_code]);
 315         ip = &ktr->ktr_args[0];
 316         if (narg) {
 317                 char c = '(';
 318                 if (fancy) {
 319
 320 #define print_number(i,n,c) do {                      \
 321         if (decimal)                                  \
 322                 (void)printf("%c%ld", c, (long)*i);   \
 323         else                                          \
 324                 (void)printf("%c%#lx", c, (long)*i);  \
 325         i++;                                          \
 326         n--;                                          \
 327         c = ',';                                      \
 328         } while (0);
 329
 330                         if (ktr->ktr_code == SYS_ioctl) {
 331                                 const char *cp;
 332                                 print_number(ip,narg,c);
 333                                 if ((cp = ioctlname(*ip)) != NULL)
 334                                         (void)printf(",%s", cp);
 335                                 else {
 336                                         if (decimal)
 337                                                 (void)printf(",%ld", (long)*ip);
 338                                         else
 339                                                 (void)printf(",%#lx ", (long)*ip);
 340                                 }
 341                                 c = ',';
 342                                 ip++;
 343                                 narg--;
 344                         } else if (ktr->ktr_code == SYS_ptrace) {
 345                                 (void)putchar('(');
 346                                 ptraceopname ((int)*ip);
 347                                 c = ',';
 348                                 ip++;
 349                                 narg--;
 350                         } else if (ktr->ktr_code == SYS_access ||
 351                                    ktr->ktr_code == SYS_eaccess) {
 352                                 print_number(ip,narg,c);
 353                                 (void)putchar(',');
 354                                 accessmodename ((int)*ip);
 355                                 ip++;
 356                                 narg--;
 357                         } else if (ktr->ktr_code == SYS_open) {
 358                                 int     flags;
 359                                 int     mode;
 360                                 print_number(ip,narg,c);
 361                                 flags = *ip;
 362                                 mode = *++ip;
 363                                 (void)putchar(',');
 364                                 flagsandmodename (flags, mode, decimal);
 365                                 ip++;
 366                                 narg-=2;
 367                         } else if (ktr->ktr_code == SYS_wait4) {
 368                                 print_number(ip,narg,c);
 369                                 print_number(ip,narg,c);
 370                                 (void)putchar(',');
 371                                 wait4optname ((int)*ip);
 372                                 ip++;
 373                                 narg--;
 374                         } else if (ktr->ktr_code == SYS_chmod ||
 375                                    ktr->ktr_code == SYS_fchmod ||
 376                                    ktr->ktr_code == SYS_lchmod) {
 377                                 print_number(ip,narg,c);
 378                                 (void)putchar(',');
 379                                 modename ((int)*ip);
 380                                 ip++;
 381                                 narg--;
 382                         } else if (ktr->ktr_code == SYS_mknod) {
 383                                 print_number(ip,narg,c);
 384                                 (void)putchar(',');
 385                                 modename ((int)*ip);
 386                                 ip++;
 387                                 narg--;
 388                         } else if (ktr->ktr_code == SYS_getfsstat) {
 389                                 print_number(ip,narg,c);
 390                                 print_number(ip,narg,c);
 391                                 (void)putchar(',');
 392                                 getfsstatflagsname ((int)*ip);
 393                                 ip++;
 394                                 narg--;
 395                         } else if (ktr->ktr_code == SYS_mount) {
 396                                 print_number(ip,narg,c);
 397                                 print_number(ip,narg,c);
 398                                 (void)putchar(',');
 399                                 mountflagsname ((int)*ip);
 400                                 ip++;
 401                                 narg--;
 402                         } else if (ktr->ktr_code == SYS_unmount) {
 403                                 print_number(ip,narg,c);
 404                                 (void)putchar(',');
 405                                 mountflagsname ((int)*ip);
 406                                 ip++;
 407                                 narg--;
 408                         } else if (ktr->ktr_code == SYS_recvmsg ||
 409                                    ktr->ktr_code == SYS_sendmsg) {
 410                                 print_number(ip,narg,c);
 411                                 print_number(ip,narg,c);
 412                                 (void)putchar(',');
 413                                 sendrecvflagsname ((int)*ip);
 414                                 ip++;
 415                                 narg--;
 416                         } else if (ktr->ktr_code == SYS_recvfrom ||
 417                                    ktr->ktr_code == SYS_sendto) {
 418                                 print_number(ip,narg,c);
 419                                 print_number(ip,narg,c);
 420                                 print_number(ip,narg,c);
 421                                 (void)putchar(',');
 422                                 sendrecvflagsname ((int)*ip);
 423                                 ip++;
 424                                 narg--;
 425                         } else if (ktr->ktr_code == SYS_chflags ||
 426                                    ktr->ktr_code == SYS_fchflags ||
 427                                    ktr->ktr_code == SYS_lchflags) {
 428                                 print_number(ip,narg,c);
 429                                 (void)putchar(',');
 430                                 modename((int)*ip);
 431                                 ip++;
 432                                 narg--;
 433                         } else if (ktr->ktr_code == SYS_kill) {
 434                                 print_number(ip,narg,c);
 435                                 (void)putchar(',');
 436                                 signame((int)*ip);
 437                                 ip++;
 438                                 narg--;
 439                         } else if (ktr->ktr_code == SYS_reboot) {
 440                                 (void)putchar('(');
 441                                 rebootoptname((int)*ip);
 442                                 ip++;
 443                                 narg--;
 444                         } else if (ktr->ktr_code == SYS_umask) {
 445                                 (void)putchar('(');
 446                                 modename((int)*ip);
 447                                 ip++;
 448                                 narg--;
 449                         } else if (ktr->ktr_code == SYS_msync) {
 450                                 print_number(ip,narg,c);
 451                                 print_number(ip,narg,c);
 452                                 (void)putchar(',');
 453                                 msyncflagsname((int)*ip);
 454                                 ip++;
 455                                 narg--;
 456 #ifdef SYS_freebsd6_mmap
 457                         } else if (ktr->ktr_code == SYS_freebsd6_mmap) {
 458                                 print_number(ip,narg,c);
 459                                 print_number(ip,narg,c);
 460                                 (void)putchar(',');
 461                                 mmapprotname ((int)*ip);
 462                                 (void)putchar(',');
 463                                 ip++;
 464                                 narg--;
 465                                 mmapflagsname ((int)*ip);
 466                                 ip++;
 467                                 narg--;
 468 #endif
 469                         } else if (ktr->ktr_code == SYS_mmap) {
 470                                 print_number(ip,narg,c);
 471                                 print_number(ip,narg,c);
 472                                 (void)putchar(',');
 473                                 mmapprotname ((int)*ip);
 474                                 (void)putchar(',');
 475                                 ip++;
 476                                 narg--;
 477                                 mmapflagsname ((int)*ip);
 478                                 ip++;
 479                                 narg--;
 480                         } else if (ktr->ktr_code == SYS_mprotect) {
 481                                 print_number(ip,narg,c);
 482                                 print_number(ip,narg,c);
 483                                 (void)putchar(',');
 484                                 mmapprotname ((int)*ip);
 485                                 ip++;
 486                                 narg--;
 487                         } else if (ktr->ktr_code == SYS_madvise) {
 488                                 print_number(ip,narg,c);
 489                                 print_number(ip,narg,c);
 490                                 (void)putchar(',');
 491                                 madvisebehavname((int)*ip);
 492                                 ip++;
 493                                 narg--;
 494                         } else if (ktr->ktr_code == SYS_setpriority) {
 495                                 print_number(ip,narg,c);
 496                                 print_number(ip,narg,c);
 497                                 (void)putchar(',');
 498                                 prioname((int)*ip);
 499                                 ip++;
 500                                 narg--;
 501                         } else if (ktr->ktr_code == SYS_fcntl) {
 502                                 int cmd;
 503                                 int arg;
 504                                 print_number(ip,narg,c);
 505                                 cmd = *ip;
 506                                 arg = *++ip;
 507                                 (void)putchar(',');
 508                                 fcntlcmdname(cmd, arg, decimal);
 509                                 ip++;
 510                                 narg-=2;
 511                         } else if (ktr->ktr_code == SYS_socket) {
 512                                 int sockdomain;
 513                                 (void)putchar('(');
 514                                 sockdomain=(int)*ip;
 515                                 sockdomainname(sockdomain);
 516                                 ip++;
 517                                 narg--;
 518                                 (void)putchar(',');
 519                                 socktypename((int)*ip);
 520                                 ip++;
 521                                 narg--;
 522                                 if (sockdomain == PF_INET ||
 523                                     sockdomain == PF_INET6) {
 524                                         (void)putchar(',');
 525                                         sockipprotoname((int)*ip);
 526                                         ip++;
 527                                         narg--;
 528                                 }
 529                                 c = ',';
 530                         } else if (ktr->ktr_code == SYS_setsockopt ||
 531                                    ktr->ktr_code == SYS_getsockopt) {
 532                                 print_number(ip,narg,c);
 533                                 (void)putchar(',');
 534                                 sockoptlevelname((int)*ip, decimal);
 535                                 if ((int)*ip == SOL_SOCKET) {
 536                                         ip++;
 537                                         narg--;
 538                                         (void)putchar(',');
 539                                         sockoptname((int)*ip);
 540                                 }
 541                                 ip++;
 542                                 narg--;
 543 #ifdef SYS_freebsd6_lseek
 544                         } else if (ktr->ktr_code == SYS_freebsd6_lseek) {
 545                                 print_number(ip,narg,c);
 546                                 /* Hidden 'pad' argument, not in lseek(2) */
 547                                 print_number(ip,narg,c);
 548                                 print_number(ip,narg,c);
 549                                 (void)putchar(',');
 550                                 whencename ((int)*ip);
 551                                 ip++;
 552                                 narg--;
 553 #endif
 554                         } else if (ktr->ktr_code == SYS_lseek) {
 555                                 print_number(ip,narg,c);
 556                                 /* Hidden 'pad' argument, not in lseek(2) */
 557                                 print_number(ip,narg,c);
 558                                 (void)putchar(',');
 559                                 whencename ((int)*ip);
 560                                 ip++;
 561                                 narg--;
 562
 563                         } else if (ktr->ktr_code == SYS_flock) {
 564                                 print_number(ip,narg,c);
 565                                 (void)putchar(',');
 566                                 flockname((int)*ip);
 567                                 ip++;
 568                                 narg--;
 569                         } else if (ktr->ktr_code == SYS_mkfifo ||
 570                                    ktr->ktr_code == SYS_mkdir) {
 571                                 print_number(ip,narg,c);
 572                                 (void)putchar(',');
 573                                 modename((int)*ip);
 574                                 ip++;
 575                                 narg--;
 576                         } else if (ktr->ktr_code == SYS_shutdown) {
 577                                 print_number(ip,narg,c);
 578                                 (void)putchar(',');
 579                                 shutdownhowname((int)*ip);
 580                                 ip++;
 581                                 narg--;
 582                         } else if (ktr->ktr_code == SYS_socketpair) {
 583                                 (void)putchar('(');
 584                                 sockdomainname((int)*ip);
 585                                 ip++;
 586                                 narg--;
 587                                 (void)putchar(',');
 588                                 socktypename((int)*ip);
 589                                 ip++;
 590                                 narg--;
 591                                 c = ',';
 592                         } else if (ktr->ktr_code == SYS_getrlimit ||
 593                                    ktr->ktr_code == SYS_setrlimit) {
 594                                 (void)putchar('(');
 595                                 rlimitname((int)*ip);
 596                                 ip++;
 597                                 narg--;
 598                                 c = ',';
 599                         } else if (ktr->ktr_code == SYS_quotactl) {
 600                                 print_number(ip,narg,c);
 601                                 (void)putchar(',');
 602                                 quotactlname((int)*ip);
 603                                 ip++;
 604                                 narg--;
 605                                 c = ',';
 606                         } else if (ktr->ktr_code == SYS_nfssvc) {
 607                                 (void)putchar('(');
 608                                 nfssvcname((int)*ip);
 609                                 ip++;
 610                                 narg--;
 611                                 c = ',';
 612                         } else if (ktr->ktr_code == SYS_rtprio) {
 613                                 (void)putchar('(');
 614                                 rtprioname((int)*ip);
 615                                 ip++;
 616                                 narg--;
 617                                 c = ',';
 618                         } else if (ktr->ktr_code == SYS___semctl) {
 619                                 print_number(ip,narg,c);
 620                                 print_number(ip,narg,c);
 621                                 (void)putchar(',');
 622                                 semctlname((int)*ip);
 623                                 ip++;
 624                                 narg--;
 625                         } else if (ktr->ktr_code == SYS_semget) {
 626                                 print_number(ip,narg,c);
 627                                 print_number(ip,narg,c);
 628                                 (void)putchar(',');
 629                                 semgetname((int)*ip);
 630                                 ip++;
 631                                 narg--;
 632                         } else if (ktr->ktr_code == SYS_msgctl) {
 633                                 print_number(ip,narg,c);
 634                                 (void)putchar(',');
 635                                 shmctlname((int)*ip);
 636                                 ip++;
 637                                 narg--;
 638                         } else if (ktr->ktr_code == SYS_shmat) {
 639                                 print_number(ip,narg,c);
 640                                 print_number(ip,narg,c);
 641                                 (void)putchar(',');
 642                                 shmatname((int)*ip);
 643                                 ip++;
 644                                 narg--;
 645                         } else if (ktr->ktr_code == SYS_shmctl) {
 646                                 print_number(ip,narg,c);
 647                                 (void)putchar(',');
 648                                 shmctlname((int)*ip);
 649                                 ip++;
 650                                 narg--;
 651                         } else if (ktr->ktr_code == SYS_minherit) {
 652                                 print_number(ip,narg,c);
 653                                 print_number(ip,narg,c);
 654                                 (void)putchar(',');
 655                                 minheritname((int)*ip);
 656                                 ip++;
 657                                 narg--;
 658                         } else if (ktr->ktr_code == SYS_rfork) {
 659                                 (void)putchar('(');
 660                                 rforkname((int)*ip);
 661                                 ip++;
 662                                 narg--;
 663                                 c = ',';
 664                         } else if (ktr->ktr_code == SYS_lio_listio) {
 665                                 (void)putchar('(');
 666                                 lio_listioname((int)*ip);
 667                                 ip++;
 668                                 narg--;
 669                                 c = ',';
 670                         } else if (ktr->ktr_code == SYS_mlockall) {
 671                                 (void)putchar('(');
 672                                 mlockallname((int)*ip);
 673                                 ip++;
 674                                 narg--;
 675                         } else if (ktr->ktr_code == SYS_sched_setscheduler) {
 676                                 print_number(ip,narg,c);
 677                                 (void)putchar(',');
 678                                 schedpolicyname((int)*ip);
 679                                 ip++;
 680                                 narg--;
 681                         } else if (ktr->ktr_code == SYS_sched_get_priority_max ||
 682                                    ktr->ktr_code == SYS_sched_get_priority_min) {
 683                                 (void)putchar('(');
 684                                 schedpolicyname((int)*ip);
 685                                 ip++;
 686                                 narg--;
 687                         } else if (ktr->ktr_code == SYS_sendfile) {
 688                                 print_number(ip,narg,c);
 689                                 print_number(ip,narg,c);
 690                                 print_number(ip,narg,c);
 691                                 print_number(ip,narg,c);
 692                                 print_number(ip,narg,c);
 693                                 print_number(ip,narg,c);
 694                                 (void)putchar(',');
 695                                 sendfileflagsname((int)*ip);
 696                                 ip++;
 697                                 narg--;
 698                         } else if (ktr->ktr_code == SYS_kldsym) {
 699                                 print_number(ip,narg,c);
 700                                 (void)putchar(',');
 701                                 kldsymcmdname((int)*ip);
 702                                 ip++;
 703                                 narg--;
 704                         } else if (ktr->ktr_code == SYS_sigprocmask) {
 705                                 (void)putchar('(');
 706                                 sigprocmaskhowname((int)*ip);
 707                                 ip++;
 708                                 narg--;
 709                                 c = ',';
 710                         } else if (ktr->ktr_code == SYS___acl_get_file ||
 711                                    ktr->ktr_code == SYS___acl_set_file ||
 712                                    ktr->ktr_code == SYS___acl_get_fd ||
 713                                    ktr->ktr_code == SYS___acl_set_fd ||
 714                                    ktr->ktr_code == SYS___acl_delete_file ||
 715                                    ktr->ktr_code == SYS___acl_delete_fd ||
 716                                    ktr->ktr_code == SYS___acl_aclcheck_file ||
 717                                    ktr->ktr_code == SYS___acl_aclcheck_fd ||
 718                                    ktr->ktr_code == SYS___acl_get_link ||
 719                                    ktr->ktr_code == SYS___acl_set_link ||
 720                                    ktr->ktr_code == SYS___acl_delete_link ||
 721                                    ktr->ktr_code == SYS___acl_aclcheck_link) {
 722                                 print_number(ip,narg,c);
 723                                 (void)putchar(',');
 724                                 acltypename((int)*ip);
 725                                 ip++;
 726                                 narg--;
 727                         } else if (ktr->ktr_code == SYS_sigaction) {
 728                                 (void)putchar('(');
 729                                 signame((int)*ip);
 730                                 ip++;
 731                                 narg--;
 732                                 c = ',';
 733                         } else if (ktr->ktr_code == SYS_extattrctl) {
 734                                 print_number(ip,narg,c);
 735                                 (void)putchar(',');
 736                                 extattrctlname((int)*ip);
 737                                 ip++;
 738                                 narg--;
 739                         } else if (ktr->ktr_code == SYS_nmount) {
 740                                 print_number(ip,narg,c);
 741                                 print_number(ip,narg,c);
 742                                 (void)putchar(',');
 743                                 mountflagsname ((int)*ip);
 744                                 ip++;
 745                                 narg--;
 746                         } else if (ktr->ktr_code == SYS_kse_thr_interrupt) {
 747                                 print_number(ip,narg,c);
 748                                 (void)putchar(',');
 749                                 ksethrcmdname ((int)*ip);
 750                                 ip++;
 751                                 narg--;
 752                         } else if (ktr->ktr_code == SYS_thr_create) {
 753                                 print_number(ip,narg,c);
 754                                 print_number(ip,narg,c);
 755                                 (void)putchar(',');
 756                                 thrcreateflagsname ((int)*ip);
 757                                 ip++;
 758                                 narg--;
 759                         } else if (ktr->ktr_code == SYS_thr_kill) {
 760                                 print_number(ip,narg,c);
 761                                 (void)putchar(',');
 762                                 signame ((int)*ip);
 763                                 ip++;
 764                                 narg--;
 765                         } else if (ktr->ktr_code == SYS_kldunloadf) {
 766                                 print_number(ip,narg,c);
 767                                 (void)putchar(',');
 768                                 kldunloadfflagsname ((int)*ip);
 769                                 ip++;
 770                                 narg--;
 771                         }
 772                 }
 773                 while (narg) {
 774                         print_number(ip,narg,c);
 775                 }
 776                 (void)putchar(')');
 777         }
 778         (void)putchar('\n');
 779 }
 780
 781 void
 782 ktrsysret(struct ktr_sysret *ktr)
 783 {
 784         register_t ret = ktr->ktr_retval;
 785         int error = ktr->ktr_error;
 786         int code = ktr->ktr_code;
 787
 788         if (code >= nsyscalls || code < 0)
 789                 (void)printf("[%d] ", code);
 790         else
 791                 (void)printf("%s ", syscallnames[code]);
 792
 793         if (error == 0) {
 794                 if (fancy) {
 795                         (void)printf("%d", ret);
 796                         if (ret < 0 || ret > 9)
 797                                 (void)printf("/%#lx", (long)ret);
 798                 } else {
 799                         if (decimal)
 800                                 (void)printf("%ld", (long)ret);
 801                         else
 802                                 (void)printf("%#lx", (long)ret);
 803                 }
 804         } else if (error == ERESTART)
 805                 (void)printf("RESTART");
 806         else if (error == EJUSTRETURN)
 807                 (void)printf("JUSTRETURN");
 808         else {
 809                 (void)printf("-1 errno %d", ktr->ktr_error);
 810                 if (fancy)
 811                         (void)printf(" %s", strerror(ktr->ktr_error));
 812         }
 813         (void)putchar('\n');
 814 }
 815
 816 void
 817 ktrnamei(char *cp, int len)
 818 {
 819         (void)printf("\"%.*s\"\n", len, cp);
 820 }
 821
 822 void
 823 hexdump(char *p, int len, int screenwidth)
 824 {
 825         int n, i;
 826         int width;
 827
 828         width = 0;
 829         do {
 830                 width += 2;
 831                 i = 13;                 /* base offset */
 832                 i += (width / 2) + 1;   /* spaces every second byte */
 833                 i += (width * 2);       /* width of bytes */
 834                 i += 3;                 /* "  |" */
 835                 i += width;             /* each byte */
 836                 i += 1;                 /* "|" */
 837         } while (i < screenwidth);
 838         width -= 2;
 839
 840         for (n = 0; n < len; n += width) {
 841                 for (i = n; i < n + width; i++) {
 842                         if ((i % width) == 0) { /* beginning of line */
 843                                 printf("       0x%04x", i);
 844                         }
 845                         if ((i % 2) == 0) {
 846                                 printf(" ");
 847                         }
 848                         if (i < len)
 849                                 printf("%02x", p[i] & 0xff);
 850                         else
 851                                 printf("  ");
 852                 }
 853                 printf("  |");
 854                 for (i = n; i < n + width; i++) {
 855                         if (i >= len)
 856                                 break;
 857                         if (p[i] >= ' ' && p[i] <= '~')
 858                                 printf("%c", p[i]);
 859                         else
 860                                 printf(".");
 861                 }
 862                 printf("|\n");
 863         }
 864         if ((i % width) != 0)
 865                 printf("\n");
 866 }
 867
 868 void
 869 visdump(char *dp, int datalen, int screenwidth)
 870 {
 871         int col = 0;
 872         char *cp;
 873         int width;
 874         char visbuf[5];
 875
 876         (void)printf("       \"");
 877         col = 8;
 878         for (;datalen > 0; datalen--, dp++) {
 879                 (void) vis(visbuf, *dp, VIS_CSTYLE, *(dp+1));
 880                 cp = visbuf;
 881                 /*
 882                  * Keep track of printables and
 883                  * space chars (like fold(1)).
 884                  */
 885                 if (col == 0) {
 886                         (void)putchar('\t');
 887                         col = 8;
 888                 }
 889                 switch(*cp) {
 890                 case '\n':
 891                         col = 0;
 892                         (void)putchar('\n');
 893                         continue;
 894                 case '\t':
 895                         width = 8 - (col&07);
 896                         break;
 897                 default:
 898                         width = strlen(cp);
 899                 }
 900                 if (col + width > (screenwidth-2)) {
 901                         (void)printf("\\\n\t");
 902                         col = 8;
 903                 }
 904                 col += width;
 905                 do {
 906                         (void)putchar(*cp++);
 907                 } while (*cp);
 908         }
 909         if (col == 0)
 910                 (void)printf("       ");
 911         (void)printf("\"\n");
 912 }
 913
 914 void
 915 ktrgenio(struct ktr_genio *ktr, int len)
 916 {
 917         int datalen = len - sizeof (struct ktr_genio);
 918         char *dp = (char *)ktr + sizeof (struct ktr_genio);
 919         static int screenwidth = 0;
 920         int i, binary;
 921
 922         if (screenwidth == 0) {
 923                 struct winsize ws;
 924
 925                 if (fancy && ioctl(fileno(stderr), TIOCGWINSZ, &ws) != -1 &&
 926                     ws.ws_col > 8)
 927                         screenwidth = ws.ws_col;
 928                 else
 929                         screenwidth = 80;
 930         }
 931         printf("fd %d %s %d byte%s\n", ktr->ktr_fd,
 932                 ktr->ktr_rw == UIO_READ ? "read" : "wrote", datalen,
 933                 datalen == 1 ? "" : "s");
 934         if (suppressdata)
 935                 return;
 936         if (maxdata && datalen > maxdata)
 937                 datalen = maxdata;
 938
 939         for (i = 0, binary = 0; i < datalen && binary == 0; i++)  {
 940                 if (dp[i] >= 32 && dp[i] < 127)
 941                         continue;
 942                 if (dp[i] == 10 || dp[i] == 13 || dp[i] == 0 || dp[i] == 9)
 943                         continue;
 944                 binary = 1;
 945         }
 946         if (binary)
 947                 hexdump(dp, datalen, screenwidth);
 948         else
 949                 visdump(dp, datalen, screenwidth);
 950 }
 951
 952 const char *signames[] = {
 953         "NULL", "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT",     /*  1 - 6  */
 954         "EMT", "FPE", "KILL", "BUS", "SEGV", "SYS",             /*  7 - 12 */
 955         "PIPE", "ALRM",  "TERM", "URG", "STOP", "TSTP",         /* 13 - 18 */
 956         "CONT", "CHLD", "TTIN", "TTOU", "IO", "XCPU",           /* 19 - 24 */
 957         "XFSZ", "VTALRM", "PROF", "WINCH", "29", "USR1",        /* 25 - 30 */
 958         "USR2", NULL,                                           /* 31 - 32 */
 959 };
 960
 961 void
 962 ktrpsig(struct ktr_psig *psig)
 963 {
 964         if (psig->signo > 0 && psig->signo < NSIG)
 965                 (void)printf("SIG%s ", signames[psig->signo]);
 966         else
 967                 (void)printf("SIG %d ", psig->signo);
 968         if (psig->action == SIG_DFL)
 969                 (void)printf("SIG_DFL\n");
 970         else {
 971                 (void)printf("caught handler=0x%lx mask=0x%x code=0x%x\n",
 972                     (u_long)psig->action, psig->mask.__bits[0], psig->code);
 973         }
 974 }
 975
 976 void
 977 ktrcsw(struct ktr_csw *cs)
 978 {
 979         (void)printf("%s %s\n", cs->out ? "stop" : "resume",
 980                 cs->user ? "user" : "kernel");
 981 }
 982
 983 #define UTRACE_DLOPEN_START             1
 984 #define UTRACE_DLOPEN_STOP              2
 985 #define UTRACE_DLCLOSE_START            3
 986 #define UTRACE_DLCLOSE_STOP             4
 987 #define UTRACE_LOAD_OBJECT              5
 988 #define UTRACE_UNLOAD_OBJECT            6
 989 #define UTRACE_ADD_RUNDEP               7
 990 #define UTRACE_PRELOAD_FINISHED         8
 991 #define UTRACE_INIT_CALL                9
 992 #define UTRACE_FINI_CALL                10
 993
 994 struct utrace_rtld {
 995         char sig[4];                            /* 'RTLD' */
 996         int event;
 997         void *handle;
 998         void *mapbase;
 999         size_t mapsize;
1000         int refcnt;
1001         char name[MAXPATHLEN];
1002 };
1003
1004 void
1005 ktruser_rtld(int len, unsigned char *p)
1006 {
1007         struct utrace_rtld *ut = (struct utrace_rtld *)p;
1008         void *parent;
1009         int mode;
1010
1011         switch (ut->event) {
1012         case UTRACE_DLOPEN_START:
1013                 mode = ut->refcnt;
1014                 printf("dlopen(%s, ", ut->name);
1015                 switch (mode & RTLD_MODEMASK) {
1016                 case RTLD_NOW:
1017                         printf("RTLD_NOW");
1018                         break;
1019                 case RTLD_LAZY:
1020                         printf("RTLD_LAZY");
1021                         break;
1022                 default:
1023                         printf("%#x", mode & RTLD_MODEMASK);
1024                 }
1025                 if (mode & RTLD_GLOBAL)
1026                         printf(" | RTLD_GLOBAL");
1027                 if (mode & RTLD_TRACE)
1028                         printf(" | RTLD_TRACE");
1029                 if (mode & ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE))
1030                         printf(" | %#x", mode &
1031                             ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE));
1032                 printf(")\n");
1033                 break;
1034         case UTRACE_DLOPEN_STOP:
1035                 printf("%p = dlopen(%s) ref %d\n", ut->handle, ut->name,
1036                     ut->refcnt);
1037                 break;
1038         case UTRACE_DLCLOSE_START:
1039                 printf("dlclose(%p) (%s, %d)\n", ut->handle, ut->name,
1040                     ut->refcnt);
1041                 break;
1042         case UTRACE_DLCLOSE_STOP:
1043                 printf("dlclose(%p) finished\n", ut->handle);
1044                 break;
1045         case UTRACE_LOAD_OBJECT:
1046                 printf("RTLD: loaded   %p @ %p - %p (%s)\n", ut->handle,
1047                     ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1,
1048                     ut->name);
1049                 break;
1050         case UTRACE_UNLOAD_OBJECT:
1051                 printf("RTLD: unloaded %p @ %p - %p (%s)\n", ut->handle,
1052                     ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1,
1053                     ut->name);
1054                 break;
1055         case UTRACE_ADD_RUNDEP:
1056                 parent = ut->mapbase;
1057                 printf("RTLD: %p now depends on %p (%s, %d)\n", parent,
1058                     ut->handle, ut->name, ut->refcnt);
1059                 break;
1060         case UTRACE_PRELOAD_FINISHED:
1061                 printf("RTLD: LD_PRELOAD finished\n");
1062                 break;
1063         case UTRACE_INIT_CALL:
1064                 printf("RTLD: init %p for %p (%s)\n", ut->mapbase, ut->handle,
1065                     ut->name);
1066                 break;
1067         case UTRACE_FINI_CALL:
1068                 printf("RTLD: fini %p for %p (%s)\n", ut->mapbase, ut->handle,
1069                     ut->name);
1070                 break;
1071         default:
1072                 p += 4;
1073                 len -= 4;
1074                 printf("RTLD: %d ", len);
1075                 while (len--)
1076                         if (decimal)
1077                                 printf(" %d", *p++);
1078                         else
1079                                 printf(" %02x", *p++);
1080                 printf("\n");
1081         }
1082 }
1083
1084 struct utrace_malloc {
1085         void *p;
1086         size_t s;
1087         void *r;
1088 };
1089
1090 void
1091 ktruser_malloc(int len, unsigned char *p)
1092 {
1093         struct utrace_malloc *ut = (struct utrace_malloc *)p;
1094
1095         if (ut->p == NULL) {
1096                 if (ut->s == 0 && ut->r == NULL)
1097                         printf("malloc_init()\n");
1098                 else
1099                         printf("%p = malloc(%zu)\n", ut->r, ut->s);
1100         } else {
1101                 if (ut->s == 0)
1102                         printf("free(%p)\n", ut->p);
1103                 else
1104                         printf("%p = realloc(%p, %zu)\n", ut->r, ut->p, ut->s);
1105         }
1106 }
1107
1108 void
1109 ktruser(int len, unsigned char *p)
1110 {
1111
1112         if (len >= 8 && bcmp(p, "RTLD", 4) == 0) {
1113                 ktruser_rtld(len, p);
1114                 return;
1115         }
1116
1117         if (len == sizeof(struct utrace_malloc)) {
1118                 ktruser_malloc(len, p);
1119                 return;
1120         }
1121
1122         (void)printf("%d ", len);
1123         while (len--)
1124                 if (decimal)
1125                         (void)printf(" %d", *p++);
1126                 else
1127                         (void)printf(" %02x", *p++);
1128         (void)printf("\n");
1129 }
1130
1131 void
1132 usage(void)
1133 {
1134         (void)fprintf(stderr,
1135   "usage: kdump [-dEnlHRsT] [-f trfile] [-m maxdata] [-p pid] [-t [cnisuw]]\n");
1136         exit(1);
1137 }