granicus.if.org Git - strace/blob - syscall.c

   1 /*
   2  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
   3  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
   4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
   5  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
   6  * Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
   7  *                     Linux for s390 port by D.J. Barrow
   8  *                    <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  *      $Id$
  34  */
  35
  36 #include "defs.h"
  37
  38 #include <signal.h>
  39 #include <time.h>
  40 #include <errno.h>
  41 #include <sys/user.h>
  42 #include <sys/syscall.h>
  43 #include <sys/param.h>
  44
  45 #if HAVE_ASM_REG_H
  46 #ifdef SPARC
  47 #  define fpq kernel_fpq
  48 #  define fq kernel_fq
  49 #  define fpu kernel_fpu
  50 #endif
  51 #include <asm/reg.h>
  52 #ifdef SPARC
  53 #  undef fpq
  54 #  undef fq
  55 #  undef fpu
  56 #endif
  57 #endif
  58
  59 #ifdef HAVE_SYS_REG_H
  60 #include <sys/reg.h>
  61 #ifndef PTRACE_PEEKUSR
  62 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
  63 #endif
  64 #elif defined(HAVE_LINUX_PTRACE_H)
  65 #undef PTRACE_SYSCALL
  66 #include <linux/ptrace.h>
  67 #endif
  68
  69 #if defined(LINUX) && defined(IA64)
  70 # include <asm/ptrace_offsets.h>
  71 # include <asm/rse.h>
  72 #endif
  73
  74 #ifndef SYS_ERRLIST_DECLARED
  75 extern int sys_nerr;
  76 extern char *sys_errlist[];
  77 #endif /* SYS_ERRLIST_DECLARED */
  78
  79 #define NR_SYSCALL_BASE 0
  80 #ifdef LINUX
  81 #ifndef ERESTARTSYS
  82 #define ERESTARTSYS     512
  83 #endif
  84 #ifndef ERESTARTNOINTR
  85 #define ERESTARTNOINTR  513
  86 #endif
  87 #ifndef ERESTARTNOHAND
  88 #define ERESTARTNOHAND  514     /* restart if no handler.. */
  89 #endif
  90 #ifndef ENOIOCTLCMD
  91 #define ENOIOCTLCMD     515     /* No ioctl command */
  92 #endif
  93 #ifndef NSIG
  94 #define NSIG 32
  95 #endif
  96 #ifdef ARM
  97 #undef NSIG
  98 #define NSIG 32
  99 #undef NR_SYSCALL_BASE
 100 #define NR_SYSCALL_BASE __NR_SYSCALL_BASE
 101 #endif
 102 #endif /* LINUX */
 103
 104 #include "syscall.h"
 105
 106 /* Define these shorthand notations to simplify the syscallent files. */
 107 #define TF TRACE_FILE
 108 #define TI TRACE_IPC
 109 #define TN TRACE_NETWORK
 110 #define TP TRACE_PROCESS
 111 #define TS TRACE_SIGNAL
 112
 113 struct sysent sysent0[] = {
 114 #include "syscallent.h"
 115 };
 116 int nsyscalls0 = sizeof sysent0 / sizeof sysent0[0];
 117
 118 #if SUPPORTED_PERSONALITIES >= 2
 119 struct sysent sysent1[] = {
 120 #include "syscallent1.h"
 121 };
 122 int nsyscalls1 = sizeof sysent1 / sizeof sysent1[0];
 123 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 124
 125 #if SUPPORTED_PERSONALITIES >= 3
 126 struct sysent sysent2[] = {
 127 #include "syscallent2.h"
 128 };
 129 int nsyscalls2 = sizeof sysent2 / sizeof sysent2[0];
 130 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 131
 132 struct sysent *sysent;
 133 int nsyscalls;
 134
 135 /* Now undef them since short defines cause wicked namespace pollution. */
 136 #undef TF
 137 #undef TI
 138 #undef TN
 139 #undef TP
 140 #undef TS
 141
 142 char *errnoent0[] = {
 143 #include "errnoent.h"
 144 };
 145 int nerrnos0 = sizeof errnoent0 / sizeof errnoent0[0];
 146
 147 #if SUPPORTED_PERSONALITIES >= 2
 148 char *errnoent1[] = {
 149 #include "errnoent1.h"
 150 };
 151 int nerrnos1 = sizeof errnoent1 / sizeof errnoent1[0];
 152 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 153
 154 #if SUPPORTED_PERSONALITIES >= 3
 155 char *errnoent2[] = {
 156 #include "errnoent2.h"
 157 };
 158 int nerrnos2 = sizeof errnoent2 / sizeof errnoent2[0];
 159 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 160
 161 char **errnoent;
 162 int nerrnos;
 163
 164 int current_personality;
 165
 166 int
 167 set_personality(personality)
 168 int personality;
 169 {
 170         switch (personality) {
 171         case 0:
 172                 errnoent = errnoent0;
 173                 nerrnos = nerrnos0;
 174                 sysent = sysent0;
 175                 nsyscalls = nsyscalls0;
 176                 ioctlent = ioctlent0;
 177                 nioctlents = nioctlents0;
 178                 signalent = signalent0;
 179                 nsignals = nsignals0;
 180                 break;
 181
 182 #if SUPPORTED_PERSONALITIES >= 2
 183         case 1:
 184                 errnoent = errnoent1;
 185                 nerrnos = nerrnos1;
 186                 sysent = sysent1;
 187                 nsyscalls = nsyscalls1;
 188                 ioctlent = ioctlent1;
 189                 nioctlents = nioctlents1;
 190                 signalent = signalent1;
 191                 nsignals = nsignals1;
 192                 break;
 193 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 194
 195 #if SUPPORTED_PERSONALITIES >= 3
 196         case 2:
 197                 errnoent = errnoent2;
 198                 nerrnos = nerrnos2;
 199                 sysent = sysent2;
 200                 nsyscalls = nsyscalls2;
 201                 ioctlent = ioctlent2;
 202                 nioctlents = nioctlents2;
 203                 signalent = signalent2;
 204                 nsignals = nsignals2;
 205                 break;
 206 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 207
 208         default:
 209                 return -1;
 210         }
 211
 212         current_personality = personality;
 213         return 0;
 214 }
 215
 216 int qual_flags[MAX_QUALS];
 217
 218 static int call_count[MAX_QUALS];
 219 static int error_count[MAX_QUALS];
 220 static struct timeval tv_count[MAX_QUALS];
 221 static int sorted_count[MAX_QUALS];
 222
 223 static struct timeval shortest = { 1000000, 0 };
 224
 225 static int lookup_syscall(), lookup_signal(), lookup_fault(), lookup_desc();
 226
 227 static struct qual_options {
 228         int bitflag;
 229         char *option_name;
 230         int (*lookup)();
 231         char *argument_name;
 232 } qual_options[] = {
 233         { QUAL_TRACE,   "trace",        lookup_syscall, "system call"   },
 234         { QUAL_TRACE,   "t",            lookup_syscall, "system call"   },
 235         { QUAL_ABBREV,  "abbrev",       lookup_syscall, "system call"   },
 236         { QUAL_ABBREV,  "a",            lookup_syscall, "system call"   },
 237         { QUAL_VERBOSE, "verbose",      lookup_syscall, "system call"   },
 238         { QUAL_VERBOSE, "v",            lookup_syscall, "system call"   },
 239         { QUAL_RAW,     "raw",          lookup_syscall, "system call"   },
 240         { QUAL_RAW,     "x",            lookup_syscall, "system call"   },
 241         { QUAL_SIGNAL,  "signal",       lookup_signal,  "signal"        },
 242         { QUAL_SIGNAL,  "signals",      lookup_signal,  "signal"        },
 243         { QUAL_SIGNAL,  "s",            lookup_signal,  "signal"        },
 244         { QUAL_FAULT,   "fault",        lookup_fault,   "fault"         },
 245         { QUAL_FAULT,   "faults",       lookup_fault,   "fault"         },
 246         { QUAL_FAULT,   "m",            lookup_fault,   "fault"         },
 247         { QUAL_READ,    "read",         lookup_desc,    "descriptor"    },
 248         { QUAL_READ,    "reads",        lookup_desc,    "descriptor"    },
 249         { QUAL_READ,    "r",            lookup_desc,    "descriptor"    },
 250         { QUAL_WRITE,   "write",        lookup_desc,    "descriptor"    },
 251         { QUAL_WRITE,   "writes",       lookup_desc,    "descriptor"    },
 252         { QUAL_WRITE,   "w",            lookup_desc,    "descriptor"    },
 253         { 0,            NULL,           NULL,           NULL            },
 254 };
 255
 256 static int
 257 lookup_syscall(s)
 258 char *s;
 259 {
 260         int i;
 261
 262         for (i = 0; i < nsyscalls; i++) {
 263                 if (strcmp(s, sysent[i].sys_name) == 0)
 264                         return i;
 265         }
 266         return -1;
 267 }
 268
 269 static int
 270 lookup_signal(s)
 271 char *s;
 272 {
 273         int i;
 274         char buf[32];
 275
 276         if (s && *s && isdigit((unsigned char)*s))
 277                 return atoi(s);
 278         strcpy(buf, s);
 279         s = buf;
 280         for (i = 0; s[i]; i++)
 281                 s[i] = toupper((unsigned char)(s[i]));
 282         if (strncmp(s, "SIG", 3) == 0)
 283                 s += 3;
 284         for (i = 0; i <= NSIG; i++) {
 285                 if (strcmp(s, signame(i) + 3) == 0)
 286                         return i;
 287         }
 288         return -1;
 289 }
 290
 291 static int
 292 lookup_fault(s)
 293 char *s;
 294 {
 295         return -1;
 296 }
 297
 298 static int
 299 lookup_desc(s)
 300 char *s;
 301 {
 302         if (s && *s && isdigit((unsigned char)*s))
 303                 return atoi(s);
 304         return -1;
 305 }
 306
 307 static int
 308 lookup_class(s)
 309 char *s;
 310 {
 311         if (strcmp(s, "file") == 0)
 312                 return TRACE_FILE;
 313         if (strcmp(s, "ipc") == 0)
 314                 return TRACE_IPC;
 315         if (strcmp(s, "network") == 0)
 316                 return TRACE_NETWORK;
 317         if (strcmp(s, "process") == 0)
 318                 return TRACE_PROCESS;
 319         if (strcmp(s, "signal") == 0)
 320                 return TRACE_SIGNAL;
 321         return -1;
 322 }
 323
 324 void
 325 qualify(s)
 326 char *s;
 327 {
 328         struct qual_options *opt;
 329         int not;
 330         char *p;
 331         int i, n;
 332
 333         opt = &qual_options[0];
 334         for (i = 0; (p = qual_options[i].option_name); i++) {
 335                 n = strlen(p);
 336                 if (strncmp(s, p, n) == 0 && s[n] == '=') {
 337                         opt = &qual_options[i];
 338                         s += n + 1;
 339                         break;
 340                 }
 341         }
 342         not = 0;
 343         if (*s == '!') {
 344                 not = 1;
 345                 s++;
 346         }
 347         if (strcmp(s, "none") == 0) {
 348                 not = 1 - not;
 349                 s = "all";
 350         }
 351         if (strcmp(s, "all") == 0) {
 352                 for (i = 0; i < MAX_QUALS; i++) {
 353                         if (not)
 354                                 qual_flags[i] &= ~opt->bitflag;
 355                         else
 356                                 qual_flags[i] |= opt->bitflag;
 357                 }
 358                 return;
 359         }
 360         for (i = 0; i < MAX_QUALS; i++) {
 361                 if (not)
 362                         qual_flags[i] |= opt->bitflag;
 363                 else
 364                         qual_flags[i] &= ~opt->bitflag;
 365         }
 366         for (p = strtok(s, ","); p; p = strtok(NULL, ",")) {
 367                 if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
 368                         for (i = 0; i < MAX_QUALS; i++) {
 369                                 if (sysent[i].sys_flags & n) {
 370                                         if (not)
 371                                                 qual_flags[i] &= ~opt->bitflag;
 372                                         else
 373                                                 qual_flags[i] |= opt->bitflag;
 374                                 }
 375                         }
 376                         continue;
 377                 }
 378                 if ((n = (*opt->lookup)(p)) < 0) {
 379                         fprintf(stderr, "strace: invalid %s `%s'\n",
 380                                 opt->argument_name, p);
 381                         exit(1);
 382                 }
 383                 if (not)
 384                         qual_flags[n] &= ~opt->bitflag;
 385                 else
 386                         qual_flags[n] |= opt->bitflag;
 387         }
 388         return;
 389 }
 390
 391 static void
 392 dumpio(tcp)
 393 struct tcb *tcp;
 394 {
 395         if (syserror(tcp))
 396                 return;
 397         if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= MAX_QUALS)
 398                 return;
 399         switch (tcp->scno + NR_SYSCALL_BASE) {
 400         case SYS_read:
 401 #ifdef SYS_recv
 402         case SYS_recv:
 403 #endif
 404 #ifdef SYS_recvfrom
 405         case SYS_recvfrom:
 406 #endif
 407                 if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
 408                         dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
 409                 break;
 410         case SYS_write:
 411 #ifdef SYS_send
 412         case SYS_send:
 413 #endif
 414 #ifdef SYS_sendto
 415         case SYS_sendto:
 416 #endif
 417                 if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
 418                         dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 419                 break;
 420         }
 421 }
 422
 423 #ifndef FREEBSD
 424 enum subcall_style { shift_style, deref_style, mask_style, door_style };
 425 #else /* FREEBSD */
 426 enum subcall_style { shift_style, deref_style, mask_style, door_style, table_style };
 427
 428 struct subcall {
 429   int call;
 430   int nsubcalls;
 431   int subcalls[5];
 432 };
 433
 434 const struct subcall subcalls_table[] = {
 435   { SYS_shmsys, 5, { SYS_shmat, SYS_shmctl, SYS_shmdt, SYS_shmget, SYS_shmctl } },
 436 #ifdef SYS_semconfig
 437   { SYS_semsys, 4, { SYS___semctl, SYS_semget, SYS_semop, SYS_semconfig } },
 438 #else
 439   { SYS_semsys, 3, { SYS___semctl, SYS_semget, SYS_semop } },
 440 #endif
 441   { SYS_msgsys, 4, { SYS_msgctl, SYS_msgget, SYS_msgsnd, SYS_msgrcv } },
 442 };
 443 #endif /* FREEBSD */
 444
 445 #if !(defined(LINUX) && ( defined(ALPHA) || defined(IA64) || defined(MIPS) ))
 446
 447 const int socket_map [] = {
 448                /* SYS_SOCKET      */ 97,
 449                /* SYS_BIND        */ 104,
 450                /* SYS_CONNECT     */ 98,
 451                /* SYS_LISTEN      */ 106,
 452                /* SYS_ACCEPT      */ 99,
 453                /* SYS_GETSOCKNAME */ 150,
 454                /* SYS_GETPEERNAME */ 141,
 455                /* SYS_SOCKETPAIR  */ 135,
 456                /* SYS_SEND        */ 101,
 457                /* SYS_RECV        */ 102,
 458                /* SYS_SENDTO      */ 133,
 459                /* SYS_RECVFROM    */ 125,
 460                /* SYS_SHUTDOWN    */ 134,
 461                /* SYS_SETSOCKOPT  */ 105,
 462                /* SYS_GETSOCKOPT  */ 118,
 463                /* SYS_SENDMSG     */ 114,
 464                /* SYS_RECVMSG     */ 113
 465 };
 466
 467 void
 468 sparc_socket_decode (tcp)
 469 struct tcb *tcp;
 470 {
 471         volatile long addr;
 472         volatile int i, n;
 473
 474         if (tcp->u_arg [0] < 1 || tcp->u_arg [0] > sizeof(socket_map)/sizeof(int)+1){
 475                 return;
 476         }
 477         tcp->scno = socket_map [tcp->u_arg [0]-1];
 478         n = tcp->u_nargs = sysent [tcp->scno].nargs;
 479         addr = tcp->u_arg [1];
 480         for (i = 0; i < n; i++){
 481                 int arg;
 482                 if (umoven (tcp, addr, sizeof (arg), (void *) &arg) < 0)
 483                         arg = 0;
 484                 tcp->u_arg [i] = arg;
 485                 addr += sizeof (arg);
 486         }
 487 }
 488
 489 static void
 490 decode_subcall(tcp, subcall, nsubcalls, style)
 491 struct tcb *tcp;
 492 int subcall;
 493 int nsubcalls;
 494 enum subcall_style style;
 495 {
 496         int i, addr, mask, arg;
 497
 498         switch (style) {
 499         case shift_style:
 500                 if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
 501                         return;
 502                 tcp->scno = subcall + tcp->u_arg[0];
 503                 if (sysent[tcp->scno].nargs != -1)
 504                         tcp->u_nargs = sysent[tcp->scno].nargs;
 505                 else
 506                         tcp->u_nargs--;
 507                 for (i = 0; i < tcp->u_nargs; i++)
 508                         tcp->u_arg[i] = tcp->u_arg[i + 1];
 509                 break;
 510         case deref_style:
 511                 if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
 512                         return;
 513                 tcp->scno = subcall + tcp->u_arg[0];
 514                 addr = tcp->u_arg[1];
 515                 for (i = 0; i < sysent[tcp->scno].nargs; i++) {
 516                         if (umove(tcp, addr, &arg) < 0)
 517                                 arg = 0;
 518                         tcp->u_arg[i] = arg;
 519                         addr += sizeof(arg);
 520                 }
 521                 tcp->u_nargs = sysent[tcp->scno].nargs;
 522                 break;
 523         case mask_style:
 524                 mask = (tcp->u_arg[0] >> 8) & 0xff;
 525                 for (i = 0; mask; i++)
 526                         mask >>= 1;
 527                 if (i >= nsubcalls)
 528                         return;
 529                 tcp->u_arg[0] &= 0xff;
 530                 tcp->scno = subcall + i;
 531                 if (sysent[tcp->scno].nargs != -1)
 532                         tcp->u_nargs = sysent[tcp->scno].nargs;
 533                 break;
 534         case door_style:
 535                 /*
 536                  * Oh, yuck.  The call code is the *sixth* argument.
 537                  * (don't you mean the *last* argument? - JH)
 538                  */
 539                 if (tcp->u_arg[5] < 0 || tcp->u_arg[5] >= nsubcalls)
 540                         return;
 541                 tcp->scno = subcall + tcp->u_arg[5];
 542                 if (sysent[tcp->scno].nargs != -1)
 543                         tcp->u_nargs = sysent[tcp->scno].nargs;
 544                 else
 545                         tcp->u_nargs--;
 546                 break;
 547 #ifdef FREEBSD
 548         case table_style:
 549                 for (i = 0; i < sizeof(subcalls_table) / sizeof(struct subcall); i++)
 550                         if (subcalls_table[i].call == tcp->scno) break;
 551                 if (i < sizeof(subcalls_table) / sizeof(struct subcall) &&
 552                     tcp->u_arg[0] >= 0 && tcp->u_arg[0] < subcalls_table[i].nsubcalls) {
 553                         tcp->scno = subcalls_table[i].subcalls[tcp->u_arg[0]];
 554                         for (i = 0; i < tcp->u_nargs; i++)
 555                                 tcp->u_arg[i] = tcp->u_arg[i + 1];
 556                 }
 557                 break;
 558 #endif /* FREEBSD */
 559         }
 560 }
 561 #endif
 562
 563 struct tcb *tcp_last = NULL;
 564
 565 static int
 566 internal_syscall(tcp)
 567 struct tcb *tcp;
 568 {
 569         /*
 570          * We must always trace a few critical system calls in order to
 571          * correctly support following forks in the presence of tracing
 572          * qualifiers.
 573          */
 574         switch (tcp->scno + NR_SYSCALL_BASE) {
 575 #ifdef SYS_fork
 576         case SYS_fork:
 577 #endif
 578 #ifdef SYS_vfork
 579         case SYS_vfork:
 580 #endif
 581 #ifdef SYS_fork1
 582         case SYS_fork1:
 583 #endif
 584 #ifdef SYS_forkall
 585         case SYS_forkall:
 586 #endif
 587 #ifdef SYS_rfork1
 588         case SYS_rfork1:
 589 #endif
 590 #ifdef SYS_rforkall
 591         case SYS_rforkall:
 592 #endif
 593                 internal_fork(tcp);
 594                 break;
 595 #ifdef SYS_clone
 596         case SYS_clone:
 597                 internal_clone(tcp);
 598                 break;
 599 #endif
 600 #ifdef SYS_execv
 601         case SYS_execv:
 602 #endif
 603 #ifdef SYS_execve
 604         case SYS_execve:
 605 #endif
 606 #ifdef SYS_rexecve
 607         case SYS_rexecve:
 608 #endif
 609                 internal_exec(tcp);
 610                 break;
 611
 612 #ifdef SYS_wait
 613         case SYS_wait:
 614 #endif
 615 #ifdef SYS_wait4
 616         case SYS_wait4:
 617 #endif
 618 #ifdef SYS_waitpid
 619         case SYS_waitpid:
 620 #endif
 621 #ifdef SYS_waitsys
 622         case SYS_waitsys:
 623 #endif
 624                 internal_wait(tcp);
 625                 break;
 626
 627 #ifdef SYS_exit
 628         case SYS_exit:
 629 #endif
 630                 internal_exit(tcp);
 631                 break;
 632         }
 633         return 0;
 634 }
 635
 636
 637 #ifdef LINUX
 638 #if defined (I386)
 639         static long eax;
 640 #elif defined (IA64)
 641         long r8, r10, psr;
 642         long ia32 = 0;
 643 #elif defined (POWERPC)
 644         static long result,flags;
 645 #elif defined (M68K)
 646         static int d0;
 647 #elif defined (ARM)
 648         static int r0;
 649 #elif defined (ALPHA)
 650         static long r0;
 651         static long a3;
 652 #elif defined (SPARC)
 653         static struct regs regs;
 654         static unsigned long trap;
 655 #elif defined(MIPS)
 656         static long a3;
 657         static long r2;
 658 #elif defined(S390)
 659         static long gpr2;
 660         static long pc;
 661 #elif defined(HPPA)
 662         static long r28;
 663 #endif
 664 #endif /* LINUX */
 665 #ifdef FREEBSD
 666         struct reg regs;
 667 #endif /* FREEBSD */
 668
 669 int
 670 get_scno(tcp)
 671 struct tcb *tcp;
 672 {
 673         long scno = 0;
 674 #ifndef USE_PROCFS
 675         int pid = tcp->pid;
 676 #endif /* !PROCFS */
 677
 678 #ifdef LINUX
 679 #if defined(S390)
 680         if (upeek(tcp->pid,PT_PSWADDR,&pc) < 0)
 681                 return -1;
 682         scno = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)(pc-4),0);
 683         if (errno)
 684                 return -1;
 685         scno&=0xFF;
 686 #elif defined (POWERPC)
 687         if (upeek(pid, 4*PT_R0, &scno) < 0)
 688                 return -1;
 689         if (!(tcp->flags & TCB_INSYSCALL)) {
 690                 /* Check if we return from execve. */
 691                 if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) {
 692                         tcp->flags &= ~TCB_WAITEXECVE;
 693                         return 0;
 694                 }
 695         }
 696 #elif defined (I386)
 697         if (upeek(pid, 4*ORIG_EAX, &scno) < 0)
 698                 return -1;
 699 #elif defined(IA64)
 700 #define IA64_PSR_IS     ((long)1 << 34)
 701         if (upeek (pid, PT_CR_IPSR, &psr) >= 0)
 702                 ia32 = (psr & IA64_PSR_IS);
 703         if (!(tcp->flags & TCB_INSYSCALL)) {
 704                 if (ia32) {
 705                         if (upeek(pid, PT_R8, &scno) < 0)
 706                                 return -1;
 707                 } else {
 708                         if (upeek (pid, PT_R15, &scno) < 0)
 709                                 return -1;
 710                 }
 711         } else {
 712                 /* syscall in progress */
 713                 if (upeek (pid, PT_R8, &r8) < 0)
 714                         return -1;
 715                 if (upeek (pid, PT_R10, &r10) < 0)
 716                         return -1;
 717         }
 718 #elif defined (ARM)
 719         {
 720             long pc;
 721             upeek(pid, 4*15, &pc);
 722             umoven(tcp, pc-4, 4, (char *)&scno);
 723             scno &= 0x000fffff;
 724         }
 725 #elif defined (M68K)
 726         if (upeek(pid, 4*PT_ORIG_D0, &scno) < 0)
 727                 return -1;
 728 #elif defined (MIPS)
 729         if (upeek(pid, REG_A3, &a3) < 0)
 730                 return -1;
 731
 732         if(!(tcp->flags & TCB_INSYSCALL)) {
 733                 if (upeek(pid, REG_V0, &scno) < 0)
 734                         return -1;
 735
 736                 if (scno < 0 || scno > nsyscalls) {
 737                         if(a3 == 0 || a3 == -1) {
 738                                 if(debug)
 739                                         fprintf (stderr, "stray syscall exit: v0 = %ld\n", scno);
 740                                 return 0;
 741                         }
 742                 }
 743         } else {
 744                 if (upeek(pid, REG_V0, &r2) < 0)
 745                         return -1;
 746         }
 747 #elif defined (ALPHA)
 748         if (upeek(pid, REG_A3, &a3) < 0)
 749                 return -1;
 750
 751         if (!(tcp->flags & TCB_INSYSCALL)) {
 752                 if (upeek(pid, REG_R0, &scno) < 0)
 753                         return -1;
 754
 755                 /* Check if we return from execve. */
 756                 if (scno == 0 && tcp->flags & TCB_WAITEXECVE) {
 757                         tcp->flags &= ~TCB_WAITEXECVE;
 758                         return 0;
 759                 }
 760
 761                 /*
 762                  * Do some sanity checks to figure out if it's
 763                  * really a syscall entry
 764                  */
 765                 if (scno < 0 || scno > nsyscalls) {
 766                         if (a3 == 0 || a3 == -1) {
 767                                 if (debug)
 768                                         fprintf (stderr, "stray syscall exit: r0 = %ld\n", scno);
 769                                 return 0;
 770                         }
 771                 }
 772         }
 773         else {
 774                 if (upeek(pid, REG_R0, &r0) < 0)
 775                         return -1;
 776         }
 777 #elif defined (SPARC)
 778         /* Everything we need is in the current register set. */
 779         if (ptrace(PTRACE_GETREGS,pid,(char *)&regs,0) < 0)
 780                 return -1;
 781
 782         /* If we are entering, then disassemble the syscall trap. */
 783         if (!(tcp->flags & TCB_INSYSCALL)) {
 784                 /* Retrieve the syscall trap instruction. */
 785                 errno = 0;
 786                 trap = ptrace(PTRACE_PEEKTEXT,pid,(char *)regs.r_pc,0);
 787                 if (errno)
 788                         return -1;
 789
 790                 /* Disassemble the trap to see what personality to use. */
 791                 switch (trap) {
 792                 case 0x91d02010:
 793                         /* Linux/SPARC syscall trap. */
 794                         set_personality(0);
 795                         break;
 796                 case 0x91d0206d:
 797                         /* Linux/SPARC64 syscall trap. */
 798                         fprintf(stderr,"syscall: Linux/SPARC64 not supported yet\n");
 799                         return -1;
 800                 case 0x91d02000:
 801                         /* SunOS syscall trap. (pers 1) */
 802                         fprintf(stderr,"syscall: SunOS no support\n");
 803                         return -1;
 804                 case 0x91d02008:
 805                         /* Solaris 2.x syscall trap. (per 2) */
 806                         set_personality(1);
 807                         break;
 808                 case 0x91d02009:
 809                         /* NetBSD/FreeBSD syscall trap. */
 810                         fprintf(stderr,"syscall: NetBSD/FreeBSD not supported\n");
 811                         return -1;
 812                 case 0x91d02027:
 813                         /* Solaris 2.x gettimeofday */
 814                         set_personality(1);
 815                         break;
 816                 default:
 817                         /* Unknown syscall trap. */
 818                         if(tcp->flags & TCB_WAITEXECVE) {
 819                                 tcp->flags &= ~TCB_WAITEXECVE;
 820                                 return 0;
 821                         }
 822                         fprintf(stderr,"syscall: unknown syscall trap %08x %08x\n", trap, regs.r_pc);
 823                         return -1;
 824                 }
 825
 826                 /* Extract the system call number from the registers. */
 827                 if (trap == 0x91d02027)
 828                         scno = 156;
 829                 else
 830                         scno = regs.r_g1;
 831                 if (scno == 0) {
 832                         scno = regs.r_o0;
 833                         memmove (&regs.r_o0, &regs.r_o1, 7*sizeof(regs.r_o0));
 834                 }
 835         }
 836 #elif defined(HPPA)
 837         if (upeek(pid, PT_GR20, &scno) < 0)
 838                 return -1;
 839         if (!(tcp->flags & TCB_INSYSCALL)) {
 840                 /* Check if we return from execve. */
 841                 if ((tcp->flags & TCB_WAITEXECVE)) {
 842                         tcp->flags &= ~TCB_WAITEXECVE;
 843                         return 0;
 844                 }
 845         }
 846 #endif
 847 #endif /* LINUX */
 848 #ifdef SUNOS4
 849         if (upeek(pid, uoff(u_arg[7]), &scno) < 0)
 850                 return -1;
 851 #endif
 852 #ifdef USE_PROCFS
 853 #ifdef HAVE_PR_SYSCALL
 854         scno = tcp->status.PR_SYSCALL;
 855 #else /* !HAVE_PR_SYSCALL */
 856 #ifndef FREEBSD
 857         scno = tcp->status.PR_WHAT;
 858 #else /* FREEBSD */
 859         if (pread(tcp->pfd_reg, &regs, sizeof(regs), 0) < 0) {
 860                 perror("pread");
 861                 return -1;
 862         }
 863         switch (regs.r_eax) {
 864         case SYS_syscall:
 865         case SYS___syscall:
 866                 pread(tcp->pfd, &scno, sizeof(scno), regs.r_esp + sizeof(int));
 867                 break;
 868         default:
 869                 scno = regs.r_eax;
 870                 break;
 871         }
 872 #endif /* FREEBSD */
 873 #endif /* !HAVE_PR_SYSCALL */
 874 #endif /* USE_PROCFS */
 875         if (!(tcp->flags & TCB_INSYSCALL))
 876                 tcp->scno = scno;
 877         return 1;
 878 }
 879
 880
 881 int
 882 syscall_fixup(tcp)
 883 struct tcb *tcp;
 884 {
 885 #ifndef USE_PROCFS
 886         int pid = tcp->pid;
 887 #else /* USE_PROCFS */
 888         int scno = tcp->scno;
 889
 890         if (!(tcp->flags & TCB_INSYSCALL)) {
 891                 if (tcp->status.PR_WHY != PR_SYSENTRY) {
 892                         if (
 893                             scno == SYS_fork
 894 #ifdef SYS_vfork
 895                             || scno == SYS_vfork
 896 #endif /* SYS_vfork */
 897 #ifdef SYS_fork1
 898                             || scno == SYS_fork1
 899 #endif /* SYS_fork1 */
 900 #ifdef SYS_forkall
 901                             || scno == SYS_forkall
 902 #endif /* SYS_forkall */
 903 #ifdef SYS_rfork1
 904                             || scno == SYS_rfork1
 905 #endif /* SYS_fork1 */
 906 #ifdef SYS_rforkall
 907                             || scno == SYS_rforkall
 908 #endif /* SYS_rforkall */
 909                             ) {
 910                                 /* We are returning in the child, fake it. */
 911                                 tcp->status.PR_WHY = PR_SYSENTRY;
 912                                 trace_syscall(tcp);
 913                                 tcp->status.PR_WHY = PR_SYSEXIT;
 914                         }
 915                         else {
 916                                 fprintf(stderr, "syscall: missing entry\n");
 917                                 tcp->flags |= TCB_INSYSCALL;
 918                         }
 919                 }
 920         }
 921         else {
 922                 if (tcp->status.PR_WHY != PR_SYSEXIT) {
 923                         fprintf(stderr, "syscall: missing exit\n");
 924                         tcp->flags &= ~TCB_INSYSCALL;
 925                 }
 926         }
 927 #endif /* USE_PROCFS */
 928 #ifdef SUNOS4
 929         if (!(tcp->flags & TCB_INSYSCALL)) {
 930                 if (scno == 0) {
 931                         fprintf(stderr, "syscall: missing entry\n");
 932                         tcp->flags |= TCB_INSYSCALL;
 933                 }
 934         }
 935         else {
 936                 if (scno != 0) {
 937                         if (debug) {
 938                                 /*
 939                                  * This happens when a signal handler
 940                                  * for a signal which interrupted a
 941                                  * a system call makes another system call.
 942                                  */
 943                                 fprintf(stderr, "syscall: missing exit\n");
 944                         }
 945                         tcp->flags &= ~TCB_INSYSCALL;
 946                 }
 947         }
 948 #endif /* SUNOS4 */
 949 #ifdef LINUX
 950 #if defined (I386)
 951         if (upeek(pid, 4*EAX, &eax) < 0)
 952                 return -1;
 953         if (eax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 954                 if (debug)
 955                         fprintf(stderr, "stray syscall exit: eax = %ld\n", eax);
 956                 return 0;
 957         }
 958 #elif defined (S390)
 959         if (upeek(pid, PT_GPR2, &gpr2) < 0)
 960                 return -1;
 961         if (gpr2 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 962                 if (debug)
 963                         fprintf(stderr, "stray syscall exit: gpr2 = %ld\n", gpr2);
 964                 return 0;
 965         }
 966 #elif defined (POWERPC)
 967 # define SO_MASK 0x10000000
 968         if (upeek(pid, 4*PT_CCR, &flags) < 0)
 969                 return -1;
 970         if (upeek(pid, 4*PT_R3, &result) < 0)
 971                 return -1;
 972         if (flags & SO_MASK)
 973                 result = -result;
 974 #elif defined (M68K)
 975         if (upeek(pid, 4*PT_D0, &d0) < 0)
 976                 return -1;
 977         if (d0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 978                 if (debug)
 979                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", d0);
 980                 return 0;
 981         }
 982 #elif defined (ARM)
 983         if (upeek(pid, 4*0, (long *)&r0) < 0)
 984                 return -1;
 985         if ( 0 && r0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 986                 if (debug)
 987                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", r0);
 988                 return 0;
 989         }
 990 #elif defined (HPPA)
 991         if (upeek(pid, PT_GR28, &r28) < 0)
 992                 return -1;
 993 #endif
 994 #endif /* LINUX */
 995         return 1;
 996 }
 997
 998 int
 999 get_error(tcp)
1000 struct tcb *tcp;
1001 {
1002         int u_error = 0;
1003 #ifdef LINUX
1004 #ifdef S390
1005                 if (gpr2 && (unsigned) -gpr2 < nerrnos) {
1006                         tcp->u_rval = -1;
1007                         u_error = -gpr2;
1008                 }
1009                 else {
1010                         tcp->u_rval = gpr2;
1011                         u_error = 0;
1012                 }
1013 #else /* !S390 */
1014 #ifdef I386
1015                 if (eax < 0 && -eax < nerrnos) {
1016                         tcp->u_rval = -1;
1017                         u_error = -eax;
1018                 }
1019                 else {
1020                         tcp->u_rval = eax;
1021                         u_error = 0;
1022                 }
1023 #else /* !I386 */
1024 #ifdef IA64
1025                 if (ia32) {
1026                         int err;
1027
1028                         err = (int)r8;
1029                         if (err < 0 && -err < nerrnos) {
1030                                 tcp->u_rval = -1;
1031                                 u_error = -err;
1032                         }
1033                         else {
1034                                 tcp->u_rval = err;
1035                                 u_error = 0;
1036                         }
1037                 } else {
1038                         if (r10) {
1039                                 tcp->u_rval = -1;
1040                                 u_error = r8;
1041                         } else {
1042                                 tcp->u_rval = r8;
1043                                 u_error = 0;
1044                         }
1045                 }
1046 #else /* !IA64 */
1047 #ifdef MIPS
1048                 if (a3) {
1049                         tcp->u_rval = -1;
1050                         u_error = r2;
1051                 } else {
1052                         tcp->u_rval = r2;
1053                         u_error = 0;
1054                 }
1055 #else
1056 #ifdef POWERPC
1057                 if (result && (unsigned) -result < nerrnos) {
1058                         tcp->u_rval = -1;
1059                         u_error = -result;
1060                 }
1061                 else {
1062                         tcp->u_rval = result;
1063                         u_error = 0;
1064                 }
1065 #else /* !POWERPC */
1066 #ifdef M68K
1067                 if (d0 && (unsigned) -d0 < nerrnos) {
1068                         tcp->u_rval = -1;
1069                         u_error = -d0;
1070                 }
1071                 else {
1072                         tcp->u_rval = d0;
1073                         u_error = 0;
1074                 }
1075 #else /* !M68K */
1076 #ifdef ARM
1077                 if (r0 && (unsigned) -r0 < nerrnos) {
1078                         tcp->u_rval = -1;
1079                         u_error = -r0;
1080                 }
1081                 else {
1082                         tcp->u_rval = r0;
1083                         u_error = 0;
1084                 }
1085 #else /* !ARM */
1086 #ifdef ALPHA
1087                 if (a3) {
1088                         tcp->u_rval = -1;
1089                         u_error = r0;
1090                 }
1091                 else {
1092                         tcp->u_rval = r0;
1093                         u_error = 0;
1094                 }
1095 #else /* !ALPHA */
1096 #ifdef SPARC
1097                 if (regs.r_psr & PSR_C) {
1098                         tcp->u_rval = -1;
1099                         u_error = regs.r_o0;
1100                 }
1101                 else {
1102                         tcp->u_rval = regs.r_o0;
1103                         u_error = 0;
1104                 }
1105 #else /* !SPARC */
1106 #ifdef HPPA
1107                 if (r28 && (unsigned) -r28 < nerrnos) {
1108                         tcp->u_rval = -1;
1109                         u_error = -r28;
1110                 }
1111                 else {
1112                         tcp->u_rval = r28;
1113                         u_error = 0;
1114                 }
1115 #endif /* HPPA */
1116 #endif /* SPARC */
1117 #endif /* ALPHA */
1118 #endif /* ARM */
1119 #endif /* M68K */
1120 #endif /* POWERPC */
1121 #endif /* MIPS */
1122 #endif /* IA64 */
1123 #endif /* I386 */
1124 #endif /* S390 */
1125 #endif /* LINUX */
1126 #ifdef SUNOS4
1127                 /* get error code from user struct */
1128                 if (upeek(pid, uoff(u_error), &u_error) < 0)
1129                         return -1;
1130                 u_error >>= 24; /* u_error is a char */
1131
1132                 /* get system call return value */
1133                 if (upeek(pid, uoff(u_rval1), &tcp->u_rval) < 0)
1134                         return -1;
1135 #endif /* SUNOS4 */
1136 #ifdef SVR4
1137 #ifdef SPARC
1138                 /* Judicious guessing goes a long way. */
1139                 if (tcp->status.pr_reg[R_PSR] & 0x100000) {
1140                         tcp->u_rval = -1;
1141                         u_error = tcp->status.pr_reg[R_O0];
1142                 }
1143                 else {
1144                         tcp->u_rval = tcp->status.pr_reg[R_O0];
1145                         u_error = 0;
1146                 }
1147 #endif /* SPARC */
1148 #ifdef I386
1149                 /* Wanna know how to kill an hour single-stepping? */
1150                 if (tcp->status.PR_REG[EFL] & 0x1) {
1151                         tcp->u_rval = -1;
1152                         u_error = tcp->status.PR_REG[EAX];
1153                 }
1154                 else {
1155                         tcp->u_rval = tcp->status.PR_REG[EAX];
1156 #ifdef HAVE_LONG_LONG
1157                         tcp->u_lrval =
1158                                 ((unsigned long long) tcp->status.PR_REG[EDX] << 32) +
1159                                 tcp->status.PR_REG[EAX];
1160 #endif
1161                         u_error = 0;
1162                 }
1163 #endif /* I386 */
1164 #ifdef MIPS
1165                 if (tcp->status.pr_reg[CTX_A3]) {
1166                         tcp->u_rval = -1;
1167                         u_error = tcp->status.pr_reg[CTX_V0];
1168                 }
1169                 else {
1170                         tcp->u_rval = tcp->status.pr_reg[CTX_V0];
1171                         u_error = 0;
1172                 }
1173 #endif /* MIPS */
1174 #endif /* SVR4 */
1175 #ifdef FREEBSD
1176                 if (regs.r_eflags & PSL_C) {
1177                         tcp->u_rval = -1;
1178                         u_error = regs.r_eax;
1179                 } else {
1180                         tcp->u_rval = regs.r_eax;
1181                         tcp->u_lrval =
1182                           ((unsigned long long) regs.r_edx << 32) +  regs.r_eax;
1183                         u_error = 0;
1184                 }
1185 #endif /* FREEBSD */
1186         tcp->u_error = u_error;
1187         return 1;
1188 }
1189
1190 int syscall_enter(tcp)
1191 struct tcb *tcp;
1192 {
1193 #ifndef USE_PROCFS
1194         int pid = tcp->pid;
1195 #endif /* !USE_PROCFS */
1196 #ifdef LINUX
1197 #if defined(S390)
1198         {
1199                 int i;
1200                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1201                         tcp->u_nargs = sysent[tcp->scno].nargs;
1202                 else
1203                         tcp->u_nargs = MAX_ARGS;
1204                 for (i = 0; i < tcp->u_nargs; i++) {
1205                         if (upeek(pid,i==0 ? PT_ORIGGPR2:PT_GPR2+(i<<2), &tcp->u_arg[i]) < 0)
1206                                 return -1;
1207                 }
1208         }
1209 #elif defined (ALPHA)
1210         {
1211                 int i;
1212                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1213                         tcp->u_nargs = sysent[tcp->scno].nargs;
1214                 else
1215                         tcp->u_nargs = MAX_ARGS;
1216                 for (i = 0; i < tcp->u_nargs; i++) {
1217                         /* WTA: if scno is out-of-bounds this will bomb. Add range-check
1218                          * for scno somewhere above here!
1219                          */
1220                         if (upeek(pid, REG_A0+i, &tcp->u_arg[i]) < 0)
1221                                 return -1;
1222                 }
1223         }
1224 #elif defined (IA64)
1225         {
1226                 unsigned long *bsp, cfm, i;
1227
1228                 if (upeek(pid, PT_AR_BSP, (long *) &bsp) < 0)
1229                         return -1;
1230                 if (upeek(pid, PT_CFM, (long *) &cfm) < 0)
1231                         return -1;
1232
1233                 bsp = ia64_rse_skip_regs(bsp, -(cfm & 0x7f));
1234
1235                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1236                         tcp->u_nargs = sysent[tcp->scno].nargs;
1237                 else
1238                         tcp->u_nargs = MAX_ARGS;
1239                 for (i = 0; i < tcp->u_nargs; ++i) {
1240                         if (umoven(tcp, (unsigned long) ia64_rse_skip_regs(bsp, i), sizeof(long),
1241                                    (char *) &tcp->u_arg[i])
1242                             < 0)
1243                                 return -1;
1244                 }
1245         }
1246 #elif defined (MIPS)
1247         {
1248                 long sp;
1249                 int i, nargs;
1250
1251                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1252                         nargs = tcp->u_nargs = sysent[tcp->scno].nargs;
1253                 else
1254                         nargs = tcp->u_nargs = MAX_ARGS;
1255                 if(nargs > 4) {
1256                         if(upeek(pid, REG_SP, &sp) < 0)
1257                                 return -1;
1258                         for(i = 0; i < 4; i++) {
1259                                 if (upeek(pid, REG_A0 + i, &tcp->u_arg[i])<0)
1260                                         return -1;
1261                         }
1262                         umoven(tcp, sp+16, (nargs-4) * sizeof(tcp->u_arg[0]),
1263                                (char *)(tcp->u_arg + 4));
1264                 } else {
1265                         for(i = 0; i < nargs; i++) {
1266                                 if (upeek(pid, REG_A0 + i, &tcp->u_arg[i]) < 0)
1267                                         return -1;
1268                         }
1269                 }
1270         }
1271 #elif defined (POWERPC)
1272         {
1273                 int i;
1274                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1275                         tcp->u_nargs = sysent[tcp->scno].nargs;
1276                 else
1277                         tcp->u_nargs = MAX_ARGS;
1278                 for (i = 0; i < tcp->u_nargs; i++) {
1279                         if (upeek(pid, (i==0) ? (4*PT_ORIG_R3) : ((i+PT_R3)*4), &tcp->u_arg[i]) < 0)
1280                                 return -1;
1281                 }
1282         }
1283 #elif defined (SPARC)
1284         {
1285                 int i;
1286
1287                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1288                         tcp->u_nargs = sysent[tcp->scno].nargs;
1289                 else
1290                         tcp->u_nargs = MAX_ARGS;
1291                 for (i = 0; i < tcp->u_nargs; i++)
1292                         tcp->u_arg[i] = *((&regs.r_o0) + i);
1293         }
1294 #elif defined (HPPA)
1295         {
1296                 int i;
1297
1298                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1299                         tcp->u_nargs = sysent[tcp->scno].nargs;
1300                 else
1301                         tcp->u_nargs = MAX_ARGS;
1302                 for (i = 0; i < tcp->u_nargs; i++) {
1303                         if (upeek(pid, PT_GR26-4*i, &tcp->u_arg[i]) < 0)
1304                                 return -1;
1305                 }
1306         }
1307 #else /* Other architecture (like i386) (32bits specific) */
1308         {
1309                 int i;
1310                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1311                         tcp->u_nargs = sysent[tcp->scno].nargs;
1312                 else
1313                         tcp->u_nargs = MAX_ARGS;
1314                 for (i = 0; i < tcp->u_nargs; i++) {
1315                         if (upeek(pid, i*4, &tcp->u_arg[i]) < 0)
1316                                 return -1;
1317                 }
1318         }
1319 #endif
1320 #endif /* LINUX */
1321 #ifdef SUNOS4
1322         {
1323                 int i;
1324                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1325                         tcp->u_nargs = sysent[tcp->scno].nargs;
1326                 else
1327                         tcp->u_nargs = MAX_ARGS;
1328                 for (i = 0; i < tcp->u_nargs; i++) {
1329                         struct user *u;
1330
1331                         if (upeek(pid, uoff(u_arg[0]) +
1332                             (i*sizeof(u->u_arg[0])), &tcp->u_arg[i]) < 0)
1333                                 return -1;
1334                 }
1335         }
1336 #endif /* SUNOS4 */
1337 #ifdef SVR4
1338 #ifdef MIPS
1339         /*
1340          * SGI is broken: even though it has pr_sysarg, it doesn't
1341          * set them on system call entry.  Get a clue.
1342          */
1343         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1344                 tcp->u_nargs = sysent[tcp->scno].nargs;
1345         else
1346                 tcp->u_nargs = tcp->status.pr_nsysarg;
1347         if (tcp->u_nargs > 4) {
1348                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1349                         4*sizeof(tcp->u_arg[0]));
1350                 umoven(tcp, tcp->status.pr_reg[CTX_SP] + 16,
1351                         (tcp->u_nargs - 4)*sizeof(tcp->u_arg[0]), (char *) (tcp->u_arg + 4));
1352         }
1353         else {
1354                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1355                         tcp->u_nargs*sizeof(tcp->u_arg[0]));
1356         }
1357 #elif UNIXWARE >= 2
1358         /*
1359          * Like SGI, UnixWare doesn't set pr_sysarg until system call exit
1360          */
1361         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1362                 tcp->u_nargs = sysent[tcp->scno].nargs;
1363         else
1364                 tcp->u_nargs = tcp->status.pr_lwp.pr_nsysarg;
1365         umoven(tcp, tcp->status.PR_REG[UESP] + 4,
1366                 tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
1367 #elif defined (HAVE_PR_SYSCALL)
1368         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1369                 tcp->u_nargs = sysent[tcp->scno].nargs;
1370         else
1371                 tcp->u_nargs = tcp->status.pr_nsysarg;
1372         {
1373                 int i;
1374                 for (i = 0; i < tcp->u_nargs; i++)
1375                         tcp->u_arg[i] = tcp->status.pr_sysarg[i];
1376         }
1377 #elif defined (I386)
1378         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1379                 tcp->u_nargs = sysent[tcp->scno].nargs;
1380         else
1381                 tcp->u_nargs = 5;
1382         umoven(tcp, tcp->status.PR_REG[UESP] + 4,
1383                 tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
1384 #else
1385         I DONT KNOW WHAT TO DO
1386 #endif /* !HAVE_PR_SYSCALL */
1387 #endif /* SVR4 */
1388 #ifdef FREEBSD
1389         if (tcp->scno >= 0 && tcp->scno < nsyscalls &&
1390             sysent[tcp->scno].nargs > tcp->status.val)
1391                 tcp->u_nargs = sysent[tcp->scno].nargs;
1392         else
1393                 tcp->u_nargs = tcp->status.val;
1394         if (tcp->u_nargs < 0)
1395                 tcp->u_nargs = 0;
1396         if (tcp->u_nargs > MAX_ARGS)
1397                 tcp->u_nargs = MAX_ARGS;
1398         switch(regs.r_eax) {
1399         case SYS___syscall:
1400                 pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
1401                       regs.r_esp + sizeof(int) + sizeof(quad_t));
1402           break;
1403         case SYS_syscall:
1404                 pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
1405                       regs.r_esp + 2 * sizeof(int));
1406           break;
1407         default:
1408                 pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
1409                       regs.r_esp + sizeof(int));
1410           break;
1411         }
1412 #endif /* FREEBSD */
1413         return 1;
1414 }
1415
1416 int
1417 trace_syscall(tcp)
1418 struct tcb *tcp;
1419 {
1420         int sys_res;
1421         struct timeval tv;
1422         int res;
1423
1424         /* Measure the exit time as early as possible to avoid errors. */
1425         if (dtime && (tcp->flags & TCB_INSYSCALL))
1426                 gettimeofday(&tv, NULL);
1427
1428         res = get_scno(tcp);
1429         if (res != 1)
1430                 return res;
1431
1432         res = syscall_fixup(tcp);
1433         if (res != 1)
1434                 return res;
1435
1436         if (tcp->flags & TCB_INSYSCALL) {
1437                 long u_error;
1438                 res = get_error(tcp);
1439                 if (res != 1)
1440                         return res;
1441                 u_error = tcp->u_error;
1442
1443
1444                 internal_syscall(tcp);
1445                 if (tcp->scno >= 0 && tcp->scno < nsyscalls &&
1446                     !(qual_flags[tcp->scno] & QUAL_TRACE)) {
1447                         tcp->flags &= ~TCB_INSYSCALL;
1448                         return 0;
1449                 }
1450
1451                 if (tcp->flags & TCB_REPRINT) {
1452                         printleader(tcp);
1453                         tprintf("<... ");
1454                         if (tcp->scno >= nsyscalls || tcp->scno < 0)
1455                                 tprintf("syscall_%lu", tcp->scno);
1456                         else
1457                                 tprintf("%s", sysent[tcp->scno].sys_name);
1458                         tprintf(" resumed> ");
1459                 }
1460
1461                 if (cflag && tcp->scno < nsyscalls && tcp->scno >= 0) {
1462                         call_count[tcp->scno]++;
1463                         if (tcp->u_error)
1464                                 error_count[tcp->scno]++;
1465                         tv_sub(&tv, &tv, &tcp->etime);
1466 #ifdef LINUX
1467                         if (tv_cmp(&tv, &tcp->dtime) > 0) {
1468                                 static struct timeval one_tick =
1469                                         { 0, 1000000 / HZ };
1470
1471                                 if (tv_nz(&tcp->dtime))
1472                                         tv = tcp->dtime;
1473                                 else if (tv_cmp(&tv, &one_tick) > 0) {
1474                                         if (tv_cmp(&shortest, &one_tick) < 0)
1475                                                 tv = shortest;
1476                                         else
1477                                                 tv = one_tick;
1478                                 }
1479                         }
1480 #endif /* LINUX */
1481                         if (tv_cmp(&tv, &shortest) < 0)
1482                                 shortest = tv;
1483                         tv_add(&tv_count[tcp->scno],
1484                                 &tv_count[tcp->scno], &tv);
1485                         tcp->flags &= ~TCB_INSYSCALL;
1486                         return 0;
1487                 }
1488
1489                 if (tcp->scno >= nsyscalls || tcp->scno < 0
1490                     || (qual_flags[tcp->scno] & QUAL_RAW))
1491                         sys_res = printargs(tcp);
1492                 else
1493                         sys_res = (*sysent[tcp->scno].sys_func)(tcp);
1494                 u_error = tcp->u_error;
1495                 tprintf(") ");
1496                 tabto(acolumn);
1497                 if (tcp->scno >= nsyscalls || tcp->scno < 0 ||
1498                     qual_flags[tcp->scno] & QUAL_RAW) {
1499                         if (u_error)
1500                                 tprintf("= -1 (errno %ld)", u_error);
1501                         else
1502                                 tprintf("= %#lx", tcp->u_rval);
1503                 }
1504                 else if (!(sys_res & RVAL_NONE) && u_error) {
1505                         switch (u_error) {
1506 #ifdef LINUX
1507                         case ERESTARTSYS:
1508                                 tprintf("= ? ERESTARTSYS (To be restarted)");
1509                                 break;
1510                         case ERESTARTNOINTR:
1511                                 tprintf("= ? ERESTARTNOINTR (To be restarted)");
1512                                 break;
1513                         case ERESTARTNOHAND:
1514                                 tprintf("= ? ERESTARTNOHAND (To be restarted)");
1515                                 break;
1516 #endif /* LINUX */
1517                         default:
1518                                 tprintf("= -1 ");
1519                                 if (u_error < nerrnos && u_error < sys_nerr)
1520                                         tprintf("%s (%s)", errnoent[u_error],
1521                                                 sys_errlist[u_error]);
1522                                 else if (u_error < nerrnos)
1523                                         tprintf("%s (errno %ld)",
1524                                                 errnoent[u_error], u_error);
1525                                 else if (u_error < sys_nerr)
1526                                         tprintf("ERRNO_%ld (%s)", u_error,
1527                                                 sys_errlist[u_error]);
1528                                 else
1529                                         tprintf("E??? (errno %ld)", u_error);
1530                                 break;
1531                         }
1532                 }
1533                 else {
1534                         if (sys_res & RVAL_NONE)
1535                                 tprintf("= ?");
1536                         else {
1537                                 switch (sys_res & RVAL_MASK) {
1538                                 case RVAL_HEX:
1539                                         tprintf("= %#lx", tcp->u_rval);
1540                                         break;
1541                                 case RVAL_OCTAL:
1542                                         tprintf("= %#lo", tcp->u_rval);
1543                                         break;
1544                                 case RVAL_UDECIMAL:
1545                                         tprintf("= %lu", tcp->u_rval);
1546                                         break;
1547                                 case RVAL_DECIMAL:
1548                                         tprintf("= %ld", tcp->u_rval);
1549                                         break;
1550 #ifdef HAVE_LONG_LONG
1551                                 case RVAL_LHEX:
1552                                         tprintf("= %#llx", tcp->u_lrval);
1553                                         break;
1554                                 case RVAL_LOCTAL:
1555                                         tprintf("= %#llo", tcp->u_lrval);
1556                                         break;
1557                                 case RVAL_LUDECIMAL:
1558                                         tprintf("= %llu", tcp->u_lrval);
1559                                         break;
1560                                 case RVAL_LDECIMAL:
1561                                         tprintf("= %lld", tcp->u_lrval);
1562                                         break;
1563 #endif
1564                                 default:
1565                                         fprintf(stderr,
1566                                                 "invalid rval format\n");
1567                                         break;
1568                                 }
1569                         }
1570                         if ((sys_res & RVAL_STR) && tcp->auxstr)
1571                                 tprintf(" (%s)", tcp->auxstr);
1572                 }
1573                 if (dtime) {
1574                         tv_sub(&tv, &tv, &tcp->etime);
1575                         tprintf(" <%ld.%06ld>",
1576                                 (long) tv.tv_sec, (long) tv.tv_usec);
1577                 }
1578                 printtrailer(tcp);
1579
1580                 dumpio(tcp);
1581                 if (fflush(tcp->outf) == EOF)
1582                         return -1;
1583                 tcp->flags &= ~TCB_INSYSCALL;
1584                 return 0;
1585         }
1586
1587         /* Entering system call */
1588         res = syscall_enter(tcp);
1589         if (res != 1)
1590                 return res;
1591
1592         switch (tcp->scno + NR_SYSCALL_BASE) {
1593 #ifdef LINUX
1594 #if !defined (ALPHA) && !defined(IA64) && !defined(SPARC) && !defined(MIPS) && !defined(HPPA)
1595         case SYS_socketcall:
1596                 decode_subcall(tcp, SYS_socket_subcall,
1597                         SYS_socket_nsubcalls, deref_style);
1598                 break;
1599         case SYS_ipc:
1600                 decode_subcall(tcp, SYS_ipc_subcall,
1601                         SYS_ipc_nsubcalls, shift_style);
1602                 break;
1603 #endif /* !ALPHA && !IA64 && !MIPS && !SPARC */
1604 #ifdef SPARC
1605         case SYS_socketcall:
1606                 sparc_socket_decode (tcp);
1607                 break;
1608 #endif
1609 #endif /* LINUX */
1610 #ifdef SVR4
1611 #ifdef SYS_pgrpsys_subcall
1612         case SYS_pgrpsys:
1613                 decode_subcall(tcp, SYS_pgrpsys_subcall,
1614                         SYS_pgrpsys_nsubcalls, shift_style);
1615                 break;
1616 #endif /* SYS_pgrpsys_subcall */
1617 #ifdef SYS_sigcall_subcall
1618         case SYS_sigcall:
1619                 decode_subcall(tcp, SYS_sigcall_subcall,
1620                         SYS_sigcall_nsubcalls, mask_style);
1621                 break;
1622 #endif /* SYS_sigcall_subcall */
1623         case SYS_msgsys:
1624                 decode_subcall(tcp, SYS_msgsys_subcall,
1625                         SYS_msgsys_nsubcalls, shift_style);
1626                 break;
1627         case SYS_shmsys:
1628                 decode_subcall(tcp, SYS_shmsys_subcall,
1629                         SYS_shmsys_nsubcalls, shift_style);
1630                 break;
1631         case SYS_semsys:
1632                 decode_subcall(tcp, SYS_semsys_subcall,
1633                         SYS_semsys_nsubcalls, shift_style);
1634                 break;
1635 #if 0 /* broken */
1636         case SYS_utssys:
1637                 decode_subcall(tcp, SYS_utssys_subcall,
1638                         SYS_utssys_nsubcalls, shift_style);
1639                 break;
1640 #endif
1641         case SYS_sysfs:
1642                 decode_subcall(tcp, SYS_sysfs_subcall,
1643                         SYS_sysfs_nsubcalls, shift_style);
1644                 break;
1645         case SYS_spcall:
1646                 decode_subcall(tcp, SYS_spcall_subcall,
1647                         SYS_spcall_nsubcalls, shift_style);
1648                 break;
1649 #ifdef SYS_context_subcall
1650         case SYS_context:
1651                 decode_subcall(tcp, SYS_context_subcall,
1652                         SYS_context_nsubcalls, shift_style);
1653                 break;
1654 #endif /* SYS_context_subcall */
1655 #ifdef SYS_door_subcall
1656         case SYS_door:
1657                 decode_subcall(tcp, SYS_door_subcall,
1658                         SYS_door_nsubcalls, door_style);
1659                 break;
1660 #endif /* SYS_door_subcall */
1661 #ifdef SYS_kaio_subcall
1662         case SYS_kaio:
1663                 decode_subcall(tcp, SYS_kaio_subcall,
1664                         SYS_kaio_nsubcalls, shift_style);
1665                 break;
1666 #endif
1667 #endif /* SVR4 */
1668 #ifdef FREEBSD
1669         case SYS_msgsys:
1670         case SYS_shmsys:
1671         case SYS_semsys:
1672                 decode_subcall(tcp, 0, 0, table_style);
1673                 break;
1674 #endif
1675 #ifdef SUNOS4
1676         case SYS_semsys:
1677                 decode_subcall(tcp, SYS_semsys_subcall,
1678                         SYS_semsys_nsubcalls, shift_style);
1679                 break;
1680         case SYS_msgsys:
1681                 decode_subcall(tcp, SYS_msgsys_subcall,
1682                         SYS_msgsys_nsubcalls, shift_style);
1683                 break;
1684         case SYS_shmsys:
1685                 decode_subcall(tcp, SYS_shmsys_subcall,
1686                         SYS_shmsys_nsubcalls, shift_style);
1687                 break;
1688 #endif
1689         }
1690
1691         internal_syscall(tcp);
1692         if (tcp->scno >=0 && tcp->scno < nsyscalls && !(qual_flags[tcp->scno] & QUAL_TRACE)) {
1693                 tcp->flags |= TCB_INSYSCALL;
1694                 return 0;
1695         }
1696
1697         if (cflag) {
1698                 gettimeofday(&tcp->etime, NULL);
1699                 tcp->flags |= TCB_INSYSCALL;
1700                 return 0;
1701         }
1702
1703         printleader(tcp);
1704         tcp->flags &= ~TCB_REPRINT;
1705         tcp_last = tcp;
1706         if (tcp->scno >= nsyscalls || tcp->scno < 0)
1707                 tprintf("syscall_%lu(", tcp->scno);
1708         else
1709                 tprintf("%s(", sysent[tcp->scno].sys_name);
1710         if (tcp->scno >= nsyscalls || tcp->scno < 0 ||
1711             ((qual_flags[tcp->scno] & QUAL_RAW) && tcp->scno != SYS_exit))
1712                 sys_res = printargs(tcp);
1713         else
1714                 sys_res = (*sysent[tcp->scno].sys_func)(tcp);
1715         if (fflush(tcp->outf) == EOF)
1716                 return -1;
1717         tcp->flags |= TCB_INSYSCALL;
1718         /* Measure the entrance time as late as possible to avoid errors. */
1719         if (dtime)
1720                 gettimeofday(&tcp->etime, NULL);
1721         return sys_res;
1722 }
1723
1724 int
1725 printargs(tcp)
1726 struct tcb *tcp;
1727 {
1728         if (entering(tcp)) {
1729                 int i;
1730
1731                 for (i = 0; i < tcp->u_nargs; i++)
1732                         tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
1733         }
1734         return 0;
1735 }
1736
1737 long
1738 getrval2(tcp)
1739 struct tcb *tcp;
1740 {
1741         long val = -1;
1742
1743 #ifdef LINUX
1744 #ifdef SPARC
1745         struct regs regs;
1746         if (ptrace(PTRACE_GETREGS,tcp->pid,(char *)&regs,0) < 0)
1747                 return -1;
1748         val = regs.r_o1;
1749 #endif /* SPARC */
1750 #endif /* LINUX */
1751
1752 #ifdef SUNOS4
1753         if (upeek(tcp->pid, uoff(u_rval2), &val) < 0)
1754                 return -1;
1755 #endif /* SUNOS4 */
1756
1757 #ifdef SVR4
1758 #ifdef SPARC
1759         val = tcp->status.PR_REG[R_O1];
1760 #endif /* SPARC */
1761 #ifdef I386
1762         val = tcp->status.PR_REG[EDX];
1763 #endif /* I386 */
1764 #ifdef MIPS
1765         val = tcp->status.PR_REG[CTX_V1];
1766 #endif /* MIPS */
1767 #endif /* SVR4 */
1768 #ifdef FREEBSD
1769         struct reg regs;
1770         pread(tcp->pfd_reg, &regs, sizeof(regs), 0);
1771         val = regs.r_edx;
1772 #endif
1773         return val;
1774 }
1775
1776 /*
1777  * Apparently, indirect system calls have already be converted by ptrace(2),
1778  * so if you see "indir" this program has gone astray.
1779  */
1780 int
1781 sys_indir(tcp)
1782 struct tcb *tcp;
1783 {
1784         int i, scno, nargs;
1785
1786         if (entering(tcp)) {
1787                 if ((scno = tcp->u_arg[0]) > nsyscalls) {
1788                         fprintf(stderr, "Bogus syscall: %u\n", scno);
1789                         return 0;
1790                 }
1791                 nargs = sysent[scno].nargs;
1792                 tprintf("%s", sysent[scno].sys_name);
1793                 for (i = 0; i < nargs; i++)
1794                         tprintf(", %#lx", tcp->u_arg[i+1]);
1795         }
1796         return 0;
1797 }
1798
1799 static int
1800 time_cmp(a, b)
1801 void *a;
1802 void *b;
1803 {
1804         return -tv_cmp(&tv_count[*((int *) a)], &tv_count[*((int *) b)]);
1805 }
1806
1807 static int
1808 syscall_cmp(a, b)
1809 void *a;
1810 void *b;
1811 {
1812         return strcmp(sysent[*((int *) a)].sys_name,
1813                 sysent[*((int *) b)].sys_name);
1814 }
1815
1816 static int
1817 count_cmp(a, b)
1818 void *a;
1819 void *b;
1820 {
1821         int m = call_count[*((int *) a)], n = call_count[*((int *) b)];
1822
1823         return (m < n) ? 1 : (m > n) ? -1 : 0;
1824 }
1825
1826 static int (*sortfun)();
1827 static struct timeval overhead = { -1, -1 };
1828
1829 void
1830 set_sortby(sortby)
1831 char *sortby;
1832 {
1833         if (strcmp(sortby, "time") == 0)
1834                 sortfun = time_cmp;
1835         else if (strcmp(sortby, "calls") == 0)
1836                 sortfun = count_cmp;
1837         else if (strcmp(sortby, "name") == 0)
1838                 sortfun = syscall_cmp;
1839         else if (strcmp(sortby, "nothing") == 0)
1840                 sortfun = NULL;
1841         else {
1842                 fprintf(stderr, "invalid sortby: `%s'\n", sortby);
1843                 exit(1);
1844         }
1845 }
1846
1847 void set_overhead(n)
1848 int n;
1849 {
1850         overhead.tv_sec = n / 1000000;
1851         overhead.tv_usec = n % 1000000;
1852 }
1853
1854 void
1855 call_summary(outf)
1856 FILE *outf;
1857 {
1858         int i, j;
1859         int call_cum, error_cum;
1860         struct timeval tv_cum, dtv;
1861         double percent;
1862         char *dashes = "-------------------------";
1863         char error_str[16];
1864
1865         call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0;
1866         if (overhead.tv_sec == -1) {
1867                 tv_mul(&overhead, &shortest, 8);
1868                 tv_div(&overhead, &overhead, 10);
1869         }
1870         for (i = 0; i < nsyscalls; i++) {
1871                 sorted_count[i] = i;
1872                 if (call_count[i] == 0)
1873                         continue;
1874                 tv_mul(&dtv, &overhead, call_count[i]);
1875                 tv_sub(&tv_count[i], &tv_count[i], &dtv);
1876                 call_cum += call_count[i];
1877                 error_cum += error_count[i];
1878                 tv_add(&tv_cum, &tv_cum, &tv_count[i]);
1879         }
1880         if (sortfun)
1881                 qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun);
1882         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n",
1883                 "% time", "seconds", "usecs/call",
1884                 "calls", "errors", "syscall");
1885         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
1886                 dashes, dashes, dashes, dashes, dashes, dashes);
1887         for (i = 0; i < nsyscalls; i++) {
1888                 j = sorted_count[i];
1889                 if (call_count[j] == 0)
1890                         continue;
1891                 tv_div(&dtv, &tv_count[j], call_count[j]);
1892                 if (error_count[j])
1893                         sprintf(error_str, "%d", error_count[j]);
1894                 else
1895                         error_str[0] = '\0';
1896                 percent = 100.0*tv_float(&tv_count[j])/tv_float(&tv_cum);
1897                 fprintf(outf, "%6.2f %4ld.%06ld %11ld %9d %9.9s %s\n",
1898                         percent, (long) tv_count[j].tv_sec,
1899                         (long) tv_count[j].tv_usec,
1900                         (long) 1000000 * dtv.tv_sec + dtv.tv_usec,
1901                         call_count[j], error_str, sysent[j].sys_name);
1902         }
1903         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
1904                 dashes, dashes, dashes, dashes, dashes, dashes);
1905         if (error_cum)
1906                 sprintf(error_str, "%d", error_cum);
1907         else
1908                 error_str[0] = '\0';
1909         fprintf(outf, "%6.6s %4ld.%06ld %11.11s %9d %9.9s %s\n",
1910                 "100.00", (long) tv_cum.tv_sec, (long) tv_cum.tv_usec, "",
1911                 call_cum, error_str, "total");
1912 }