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  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  *
  29  *      $Id$
  30  */
  31
  32 #include "defs.h"
  33
  34 #include <signal.h>
  35 #include <time.h>
  36 #include <errno.h>
  37 #include <sys/user.h>
  38 #include <sys/syscall.h>
  39 #include <sys/param.h>
  40 #if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 1 && (defined(I386) || defined(M68K))
  41 # include <sys/reg.h>
  42 #endif
  43
  44 #if defined LINUX && __GLIBC__ < 2
  45 #include <linux/ptrace.h>
  46 #endif /* LINUX */
  47
  48 #ifndef SYS_ERRLIST_DECLARED
  49 extern int sys_nerr;
  50 extern char *sys_errlist[];
  51 #endif /* SYS_ERRLIST_DECLARED */
  52
  53 #ifdef LINUX
  54 #ifndef ERESTARTSYS
  55 #define ERESTARTSYS     512
  56 #endif
  57 #ifndef ERESTARTNOINTR
  58 #define ERESTARTNOINTR  513
  59 #endif
  60 #ifndef ERESTARTNOHAND
  61 #define ERESTARTNOHAND  514     /* restart if no handler.. */
  62 #endif
  63 #ifndef ENOIOCTLCMD
  64 #define ENOIOCTLCMD     515     /* No ioctl command */
  65 #endif
  66 #ifndef NSIG
  67 #define NSIG 32
  68 #endif
  69 #ifdef ARM
  70 #undef NSIG
  71 #define NSIG 32
  72 #endif
  73 #endif /* LINUX */
  74
  75 #include "syscall.h"
  76
  77 /* Define these shorthand notations to simplify the syscallent files. */
  78 #define TF TRACE_FILE
  79 #define TI TRACE_IPC
  80 #define TN TRACE_NETWORK
  81 #define TP TRACE_PROCESS
  82 #define TS TRACE_SIGNAL
  83
  84 struct sysent sysent0[] = {
  85 #include "syscallent.h"
  86 };
  87 int nsyscalls0 = sizeof sysent0 / sizeof sysent0[0];
  88
  89 #if SUPPORTED_PERSONALITIES >= 2
  90 struct sysent sysent1[] = {
  91 #include "syscallent1.h"
  92 };
  93 int nsyscalls1 = sizeof sysent1 / sizeof sysent1[0];
  94 #endif /* SUPPORTED_PERSONALITIES >= 2 */
  95
  96 #if SUPPORTED_PERSONALITIES >= 3
  97 struct sysent sysent2[] = {
  98 #include "syscallent2.h"
  99 };
 100 int nsyscalls2 = sizeof sysent2 / sizeof sysent2[0];
 101 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 102
 103 struct sysent *sysent;
 104 int nsyscalls;
 105
 106 /* Now undef them since short defines cause wicked namespace pollution. */
 107 #undef TF
 108 #undef TI
 109 #undef TN
 110 #undef TP
 111 #undef TS
 112
 113 char *errnoent0[] = {
 114 #include "errnoent.h"
 115 };
 116 int nerrnos0 = sizeof errnoent0 / sizeof errnoent0[0];
 117
 118 #if SUPPORTED_PERSONALITIES >= 2
 119 char *errnoent1[] = {
 120 #include "errnoent1.h"
 121 };
 122 int nerrnos1 = sizeof errnoent1 / sizeof errnoent1[0];
 123 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 124
 125 #if SUPPORTED_PERSONALITIES >= 3
 126 char *errnoent2[] = {
 127 #include "errnoent2.h"
 128 };
 129 int nerrnos2 = sizeof errnoent2 / sizeof errnoent2[0];
 130 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 131
 132 char **errnoent;
 133 int nerrnos;
 134
 135 int current_personality;
 136
 137 int
 138 set_personality(int personality)
 139 {
 140         switch (personality) {
 141         case 0:
 142                 errnoent = errnoent0;
 143                 nerrnos = nerrnos0;
 144                 sysent = sysent0;
 145                 nsyscalls = nsyscalls0;
 146                 ioctlent = ioctlent0;
 147                 nioctlents = nioctlents0;
 148                 signalent = signalent0;
 149                 nsignals = nsignals0;
 150                 break;
 151
 152 #if SUPPORTED_PERSONALITIES >= 2
 153         case 1:
 154                 errnoent = errnoent1;
 155                 nerrnos = nerrnos1;
 156                 sysent = sysent1;
 157                 nsyscalls = nsyscalls1;
 158                 ioctlent = ioctlent1;
 159                 nioctlents = nioctlents1;
 160                 signalent = signalent1;
 161                 nsignals = nsignals1;
 162                 break;
 163 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 164
 165 #if SUPPORTED_PERSONALITIES >= 3
 166         case 2:
 167                 errnoent = errnoent2;
 168                 nerrnos = nerrnos2;
 169                 sysent = sysent2;
 170                 nsyscalls = nsyscalls2;
 171                 ioctlent = ioctlent2;
 172                 nioctlents = nioctlents2;
 173                 signalent = signalent2;
 174                 nsignals = nsignals2;
 175                 break;
 176 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 177
 178         default:
 179                 return -1;
 180         }
 181
 182         current_personality = personality;
 183         return 0;
 184 }
 185
 186 int qual_flags[MAX_QUALS];
 187
 188 static int call_count[MAX_QUALS];
 189 static int error_count[MAX_QUALS];
 190 static struct timeval tv_count[MAX_QUALS];
 191 static int sorted_count[MAX_QUALS];
 192
 193 static struct timeval shortest = { 1000000, 0 };
 194
 195 static int lookup_syscall(), lookup_signal(), lookup_fault(), lookup_desc();
 196
 197 static struct qual_options {
 198         int bitflag;
 199         char *option_name;
 200         int (*lookup)();
 201         char *argument_name;
 202 } qual_options[] = {
 203         { QUAL_TRACE,   "trace",        lookup_syscall, "system call"   },
 204         { QUAL_TRACE,   "t",            lookup_syscall, "system call"   },
 205         { QUAL_ABBREV,  "abbrev",       lookup_syscall, "system call"   },
 206         { QUAL_ABBREV,  "a",            lookup_syscall, "system call"   },
 207         { QUAL_VERBOSE, "verbose",      lookup_syscall, "system call"   },
 208         { QUAL_VERBOSE, "v",            lookup_syscall, "system call"   },
 209         { QUAL_RAW,     "raw",          lookup_syscall, "system call"   },
 210         { QUAL_RAW,     "x",            lookup_syscall, "system call"   },
 211         { QUAL_SIGNAL,  "signal",       lookup_signal,  "signal"        },
 212         { QUAL_SIGNAL,  "signals",      lookup_signal,  "signal"        },
 213         { QUAL_SIGNAL,  "s",            lookup_signal,  "signal"        },
 214         { QUAL_FAULT,   "fault",        lookup_fault,   "fault"         },
 215         { QUAL_FAULT,   "faults",       lookup_fault,   "fault"         },
 216         { QUAL_FAULT,   "m",            lookup_fault,   "fault"         },
 217         { QUAL_READ,    "read",         lookup_desc,    "descriptor"    },
 218         { QUAL_READ,    "reads",        lookup_desc,    "descriptor"    },
 219         { QUAL_READ,    "r",            lookup_desc,    "descriptor"    },
 220         { QUAL_WRITE,   "write",        lookup_desc,    "descriptor"    },
 221         { QUAL_WRITE,   "writes",       lookup_desc,    "descriptor"    },
 222         { QUAL_WRITE,   "w",            lookup_desc,    "descriptor"    },
 223         { 0,            NULL,           NULL,           NULL            },
 224 };
 225
 226 static int
 227 lookup_syscall(s)
 228 char *s;
 229 {
 230         int i;
 231
 232         for (i = 0; i < nsyscalls; i++) {
 233                 if (strcmp(s, sysent[i].sys_name) == 0)
 234                         return i;
 235         }
 236         return -1;
 237 }
 238
 239 static int
 240 lookup_signal(s)
 241 char *s;
 242 {
 243         int i;
 244         char buf[32];
 245
 246         if (s && *s && isdigit(*s))
 247                 return atoi(s);
 248         strcpy(buf, s);
 249         s = buf;
 250         for (i = 0; s[i]; i++)
 251                 s[i] = toupper(s[i]);
 252         if (strncmp(s, "SIG", 3) == 0)
 253                 s += 3;
 254         for (i = 0; i <= NSIG; i++) {
 255                 if (strcmp(s, signame(i) + 3) == 0)
 256                         return i;
 257         }
 258         return -1;
 259 }
 260
 261 static int
 262 lookup_fault(s)
 263 char *s;
 264 {
 265         return -1;
 266 }
 267
 268 static int
 269 lookup_desc(s)
 270 char *s;
 271 {
 272         if (s && *s && isdigit(*s))
 273                 return atoi(s);
 274         return -1;
 275 }
 276
 277 static int
 278 lookup_class(s)
 279 char *s;
 280 {
 281         if (strcmp(s, "file") == 0)
 282                 return TRACE_FILE;
 283         if (strcmp(s, "ipc") == 0)
 284                 return TRACE_IPC;
 285         if (strcmp(s, "network") == 0)
 286                 return TRACE_NETWORK;
 287         if (strcmp(s, "process") == 0)
 288                 return TRACE_PROCESS;
 289         if (strcmp(s, "signal") == 0)
 290                 return TRACE_SIGNAL;
 291         return -1;
 292 }
 293
 294 void
 295 qualify(s)
 296 char *s;
 297 {
 298         struct qual_options *opt;
 299         int not;
 300         char *p;
 301         int i, n;
 302
 303         opt = &qual_options[0];
 304         for (i = 0; (p = qual_options[i].option_name); i++) {
 305                 n = strlen(p);
 306                 if (strncmp(s, p, n) == 0 && s[n] == '=') {
 307                         opt = &qual_options[i];
 308                         s += n + 1;
 309                         break;
 310                 }
 311         }
 312         not = 0;
 313         if (*s == '!') {
 314                 not = 1;
 315                 s++;
 316         }
 317         if (strcmp(s, "none") == 0) {
 318                 not = 1 - not;
 319                 s = "all";
 320         }
 321         if (strcmp(s, "all") == 0) {
 322                 for (i = 0; i < MAX_QUALS; i++) {
 323                         if (not)
 324                                 qual_flags[i] &= ~opt->bitflag;
 325                         else
 326                                 qual_flags[i] |= opt->bitflag;
 327                 }
 328                 return;
 329         }
 330         for (i = 0; i < MAX_QUALS; i++) {
 331                 if (not)
 332                         qual_flags[i] |= opt->bitflag;
 333                 else
 334                         qual_flags[i] &= ~opt->bitflag;
 335         }
 336         for (p = strtok(s, ","); p; p = strtok(NULL, ",")) {
 337                 if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
 338                         for (i = 0; i < MAX_QUALS; i++) {
 339                                 if (sysent[i].sys_flags & n) {
 340                                         if (not)
 341                                                 qual_flags[i] &= ~opt->bitflag;
 342                                         else
 343                                                 qual_flags[i] |= opt->bitflag;
 344                                 }
 345                         }
 346                         continue;
 347                 }
 348                 if ((n = (*opt->lookup)(p)) < 0) {
 349                         fprintf(stderr, "strace: invalid %s `%s'\n",
 350                                 opt->argument_name, p);
 351                         exit(1);
 352                 }
 353                 if (not)
 354                         qual_flags[n] &= ~opt->bitflag;
 355                 else
 356                         qual_flags[n] |= opt->bitflag;
 357         }
 358         return;
 359 }
 360
 361 static void
 362 dumpio(tcp)
 363 struct tcb *tcp;
 364 {
 365         if (syserror(tcp))
 366                 return;
 367         if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= MAX_QUALS)
 368                 return;
 369 #ifdef __arm__
 370         switch (tcp->scno + __NR_SYSCALL_BASE) {
 371 #else
 372         switch (tcp->scno) {
 373 #endif
 374         case SYS_read:
 375 #ifdef SYS_recv
 376         case SYS_recv:
 377 #endif
 378 #ifdef SYS_recvfrom
 379         case SYS_recvfrom:
 380 #endif
 381                 if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
 382                         dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
 383                 break;
 384         case SYS_write:
 385 #ifdef SYS_send
 386         case SYS_send:
 387 #endif
 388 #ifdef SYS_sendto
 389         case SYS_sendto:
 390 #endif
 391                 if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
 392                         dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 393                 break;
 394         }
 395 }
 396
 397 enum subcall_style { shift_style, deref_style, mask_style };
 398
 399 #if !(defined(LINUX) && defined(ALPHA))
 400
 401 const int socket_map [] = {
 402                /* SYS_SOCKET      */ 97,
 403                /* SYS_BIND        */ 104,
 404                /* SYS_CONNECT     */ 98,
 405                /* SYS_LISTEN      */ 106,
 406                /* SYS_ACCEPT      */ 99,
 407                /* SYS_GETSOCKNAME */ 150,
 408                /* SYS_GETPEERNAME */ 141,
 409                /* SYS_SOCKETPAIR  */ 135,
 410                /* SYS_SEND        */ 101,
 411                /* SYS_RECV        */ 102,
 412                /* SYS_SENDTO      */ 133,
 413                /* SYS_RECVFROM    */ 125,
 414                /* SYS_SHUTDOWN    */ 134,
 415                /* SYS_SETSOCKOPT  */ 105,
 416                /* SYS_GETSOCKOPT  */ 118,
 417                /* SYS_SENDMSG     */ 114,
 418                /* SYS_RECVMSG     */ 113
 419 };
 420
 421 void
 422 sparc_socket_decode (struct tcb *tcp)
 423 {
 424         volatile long addr;
 425         volatile int i, n;
 426
 427         if (tcp->u_arg [0] < 1 || tcp->u_arg [0] > sizeof(socket_map)/sizeof(int)+1){
 428                 return;
 429         }
 430         tcp->scno = socket_map [tcp->u_arg [0]-1];
 431         n = tcp->u_nargs = sysent [tcp->scno].nargs;
 432         addr = tcp->u_arg [1];
 433         for (i = 0; i < n; i++){
 434                 int arg;
 435                 if (umoven (tcp, addr, sizeof (arg), (void *) &arg) < 0)
 436                         arg = 0;
 437                 tcp->u_arg [i] = arg;
 438                 addr += sizeof (arg);
 439         }
 440 }
 441
 442 static void
 443 decode_subcall(tcp, subcall, nsubcalls, style)
 444 struct tcb *tcp;
 445 int subcall;
 446 int nsubcalls;
 447 enum subcall_style style;
 448 {
 449         int i, addr, mask, arg;
 450
 451         if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
 452                 return;
 453         switch (style) {
 454         case shift_style:
 455                 tcp->scno = subcall + tcp->u_arg[0];
 456                 if (sysent[tcp->scno].nargs != -1)
 457                         tcp->u_nargs = sysent[tcp->scno].nargs;
 458                 else
 459                         tcp->u_nargs--;
 460                 for (i = 0; i < tcp->u_nargs; i++)
 461                         tcp->u_arg[i] = tcp->u_arg[i + 1];
 462                 break;
 463         case deref_style:
 464                 tcp->scno = subcall + tcp->u_arg[0];
 465                 addr = tcp->u_arg[1];
 466                 for (i = 0; i < sysent[tcp->scno].nargs; i++) {
 467                         if (umove(tcp, addr, &arg) < 0)
 468                                 arg = 0;
 469                         tcp->u_arg[i] = arg;
 470                         addr += sizeof(arg);
 471                 }
 472                 tcp->u_nargs = sysent[tcp->scno].nargs;
 473                 break;
 474         case mask_style:
 475                 mask = (tcp->u_arg[0] >> 8) & 0xff;
 476                 tcp->u_arg[0] &= 0xff;
 477                 for (i = 0; mask; i++)
 478                         mask >>= 1;
 479                 tcp->scno = subcall + i;
 480                 if (sysent[tcp->scno].nargs != -1)
 481                         tcp->u_nargs = sysent[tcp->scno].nargs;
 482                 break;
 483         }
 484 }
 485 #endif
 486
 487 struct tcb *tcp_last = NULL;
 488
 489 static int
 490 internal_syscall(tcp)
 491 struct tcb *tcp;
 492 {
 493         /*
 494          * We must always trace a few critical system calls in order to
 495          * correctly support following forks in the presence of tracing
 496          * qualifiers.
 497          */
 498 #ifdef __arm__
 499         switch (tcp->scno + __NR_SYSCALL_BASE) {
 500 #else
 501         switch (tcp->scno) {
 502 #endif
 503 #ifdef SYS_fork
 504         case SYS_fork:
 505 #endif
 506 #ifdef SYS_vfork
 507         case SYS_vfork:
 508 #endif
 509 #ifdef SYS_clone
 510         case SYS_clone:
 511 #endif
 512                 internal_fork(tcp);
 513                 break;
 514
 515 #ifdef SYS_execv
 516         case SYS_execv:
 517 #endif
 518 #ifdef SYS_execve
 519         case SYS_execve:
 520 #endif
 521                 internal_exec(tcp);
 522                 break;
 523
 524 #ifdef SYS_wait
 525         case SYS_wait:
 526 #endif
 527 #ifdef SYS_wait4
 528         case SYS_wait4:
 529 #endif
 530 #ifdef SYS_waitpid
 531         case SYS_waitpid:
 532 #endif
 533 #ifdef SYS_waitsys
 534         case SYS_waitsys:
 535 #endif
 536                 internal_wait(tcp);
 537                 break;
 538
 539 #ifdef SYS_exit
 540         case SYS_exit:
 541 #endif
 542                 internal_exit(tcp);
 543                 break;
 544         }
 545         return 0;
 546 }
 547
 548 int
 549 trace_syscall(tcp)
 550 struct tcb *tcp;
 551 {
 552         int sys_res;
 553         struct timeval tv;
 554         long scno = 0;
 555 #ifdef LINUX
 556 #if defined (I386)
 557         long eax;
 558 #elif defined (POWERPC)
 559         long result,flags;
 560 #elif defined (M68K)
 561         int d0;
 562 #elif defined (ARM)
 563         int r0;
 564 #elif defined (ALPHA)
 565         long r0;
 566         long a3;
 567 #elif defined (SPARC)
 568         struct pt_regs regs;
 569         unsigned long trap;
 570 #endif
 571 #endif /* LINUX */
 572
 573 #ifndef SVR4
 574         int pid = tcp->pid;
 575 #endif /* !SVR4 */
 576
 577         /* Measure the exit time as early as possible to avoid errors. */
 578         if (dtime && (tcp->flags & TCB_INSYSCALL))
 579                 gettimeofday(&tv, NULL);
 580 #ifdef LINUX
 581 #if defined (POWERPC)
 582         if (upeek(pid, 4*PT_R0, &scno) < 0)
 583                 return -1;
 584         if (!(tcp->flags & TCB_INSYSCALL)) {
 585                 /* Check if we return from execve. */
 586                 if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) {
 587                         tcp->flags &= ~TCB_WAITEXECVE;
 588                         return 0;
 589                 }
 590         }
 591 #elif defined (I386)
 592         if (upeek(pid, 4*ORIG_EAX, &scno) < 0)
 593                 return -1;
 594 #elif defined (ARM)
 595         {
 596             long pc;
 597             upeek(pid, 4*15, &pc);
 598             umoven(tcp, pc-4, 4, (char *)&scno);
 599             scno &= 0x000fffff;
 600         }
 601 #elif defined (M68K)
 602         if (upeek(pid, 4*PT_ORIG_D0, &scno) < 0)
 603                 return -1;
 604 #elif defined (ALPHA)
 605         if (upeek(pid, REG_A3, &a3) < 0)
 606                 return -1;
 607
 608         if (!(tcp->flags & TCB_INSYSCALL)) {
 609                 if (upeek(pid, REG_R0, &scno) < 0)
 610                         return -1;
 611
 612                 /* Check if we return from execve. */
 613                 if (scno == 0 && tcp->flags & TCB_WAITEXECVE) {
 614                         tcp->flags &= ~TCB_WAITEXECVE;
 615                         return 0;
 616                 }
 617
 618                 /*
 619                  * Do some sanity checks to figure out if it's
 620                  * really a syscall entry
 621                  */
 622                 if (scno < 0 || scno > nsyscalls) {
 623                         if (a3 == 0 || a3 == -1) {
 624                                 if (debug)
 625                                         fprintf (stderr, "stray syscall exit: r0 = %ld\n", scno);
 626                                 return 0;
 627                         }
 628                 }
 629         }
 630         else {
 631                 if (upeek(pid, REG_R0, &r0) < 0)
 632                         return -1;
 633         }
 634 #elif defined (SPARC)
 635         /* Everything we need is in the current register set. */
 636         if (ptrace(PTRACE_GETREGS,pid,(char *)&regs,0) < 0)
 637                 return -1;
 638
 639         memmove (&regs.u_regs [1], &regs.u_regs [0],
 640                  sizeof (regs.u_regs) - sizeof (regs.u_regs [0]));
 641
 642         /* If we are entering, then disassemble the syscall trap. */
 643         if (!(tcp->flags & TCB_INSYSCALL)) {
 644                 /* Retrieve the syscall trap instruction. */
 645                 errno = 0;
 646                 trap = ptrace(PTRACE_PEEKTEXT,pid,(char *)regs.pc,0);
 647                 if (errno)
 648                         return -1;
 649
 650                 /* Disassemble the trap to see what personality to use. */
 651                 switch (trap) {
 652                 case 0x91d02010:
 653                         /* Linux/SPARC syscall trap. */
 654                         set_personality(0);
 655                         break;
 656                 case 0x91d0206d:
 657                         /* Linux/SPARC64 syscall trap. */
 658                         fprintf(stderr,"syscall: Linux/SPARC64 not supported yet\n");
 659                         return -1;
 660                 case 0x91d02000:
 661                         /* SunOS syscall trap. (pers 1) */
 662                         fprintf(stderr,"syscall: SunOS no support\n");
 663                         return -1;
 664                 case 0x91d02008:
 665                         /* Solaris 2.x syscall trap. (per 2) */
 666                         set_personality(1);
 667                         break;
 668                 case 0x91d02009:
 669                         /* NetBSD/FreeBSD syscall trap. */
 670                         fprintf(stderr,"syscall: NetBSD/FreeBSD not supported\n");
 671                         return -1;
 672                 case 0x91d02027:
 673                         /* Solaris 2.x gettimeofday */
 674                         set_personality(1);
 675                         break;
 676                 default:
 677                         /* Unknown syscall trap. */
 678                         if(tcp->flags & TCB_WAITEXECVE) {
 679                                 tcp->flags &= ~TCB_WAITEXECVE;
 680                                 return 0;
 681                         }
 682                         fprintf(stderr,"syscall: unknown syscall trap %08x %08x\n", trap, regs.pc);
 683                         return -1;
 684                 }
 685
 686                 /* Extract the system call number from the registers. */
 687                 if (trap == 0x91d02027)
 688                         scno = 156;
 689                 else
 690                         scno = regs.u_regs[UREG_G1];
 691                 if (scno == 0) {
 692                         scno = regs.u_regs[UREG_I0];
 693                         memmove (&regs.u_regs[UREG_I0], &regs.u_regs[UREG_I1], 7*sizeof(regs.u_regs[0]));
 694                 }
 695         }
 696 #endif
 697 #endif /* LINUX */
 698 #ifdef SUNOS4
 699         if (upeek(pid, uoff(u_arg[7]), &scno) < 0)
 700                 return -1;
 701 #endif
 702 #ifdef SVR4
 703 #ifdef HAVE_PR_SYSCALL
 704         scno = tcp->status.pr_syscall;
 705 #else /* !HAVE_PR_SYSCALL */
 706         scno = tcp->status.pr_what;
 707 #endif /* !HAVE_PR_SYSCALL */
 708         if (!(tcp->flags & TCB_INSYSCALL)) {
 709                 if (tcp->status.pr_why != PR_SYSENTRY) {
 710                         if (
 711                             scno == SYS_fork
 712 #ifdef SYS_vfork
 713                             || scno == SYS_vfork
 714 #endif /* SYS_vfork */
 715                             ) {
 716                                 /* We are returning in the child, fake it. */
 717                                 tcp->status.pr_why = PR_SYSENTRY;
 718                                 trace_syscall(tcp);
 719                                 tcp->status.pr_why = PR_SYSEXIT;
 720                         }
 721                         else {
 722                                 fprintf(stderr, "syscall: missing entry\n");
 723                                 tcp->flags |= TCB_INSYSCALL;
 724                         }
 725                 }
 726         }
 727         else {
 728                 if (tcp->status.pr_why != PR_SYSEXIT) {
 729                         fprintf(stderr, "syscall: missing exit\n");
 730                         tcp->flags &= ~TCB_INSYSCALL;
 731                 }
 732         }
 733 #endif /* SVR4 */
 734 #ifdef SUNOS4
 735         if (!(tcp->flags & TCB_INSYSCALL)) {
 736                 if (scno == 0) {
 737                         fprintf(stderr, "syscall: missing entry\n");
 738                         tcp->flags |= TCB_INSYSCALL;
 739                 }
 740         }
 741         else {
 742                 if (scno != 0) {
 743                         if (debug) {
 744                                 /*
 745                                  * This happens when a signal handler
 746                                  * for a signal which interrupted a
 747                                  * a system call makes another system call.
 748                                  */
 749                                 fprintf(stderr, "syscall: missing exit\n");
 750                         }
 751                         tcp->flags &= ~TCB_INSYSCALL;
 752                 }
 753         }
 754 #endif /* SUNOS4 */
 755 #ifdef LINUX
 756 #if defined (I386)
 757         if (upeek(pid, 4*EAX, &eax) < 0)
 758                 return -1;
 759         if (eax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 760                 if (debug)
 761                         fprintf(stderr, "stray syscall exit: eax = %ld\n", eax);
 762                 return 0;
 763         }
 764 #elif defined (POWERPC)
 765 # define SO_MASK 0x10000000
 766         if (upeek(pid, 4*PT_CCR, &flags) < 0)
 767                 return -1;
 768         if (upeek(pid, 4*PT_R3, &result) < 0)
 769                 return -1;
 770         if (flags & SO_MASK)
 771                 result = -result;
 772 #elif defined (M68K)
 773         if (upeek(pid, 4*PT_D0, &d0) < 0)
 774                 return -1;
 775         if (d0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 776                 if (debug)
 777                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", d0);
 778                 return 0;
 779         }
 780 #elif defined (ARM)
 781         if (upeek(pid, 4*0, (long *)&r0) < 0)
 782                 return -1;
 783         if ( 0 && r0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 784                 if (debug)
 785                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", r0);
 786                 return 0;
 787         }
 788 #else
 789 #endif
 790 #endif /* LINUX */
 791
 792         if (tcp->flags & TCB_INSYSCALL) {
 793                 long u_error;
 794
 795 #ifdef LINUX
 796 #ifdef I386
 797                 if (eax < 0 && -eax < nerrnos) {
 798                         tcp->u_rval = -1;
 799                         u_error = -eax;
 800                 }
 801                 else {
 802                         tcp->u_rval = eax;
 803                         u_error = 0;
 804                 }
 805 #else /* !I386 */
 806 #ifdef POWERPC
 807                 if (result && (unsigned) -result < nerrnos) {
 808                         tcp->u_rval = -1;
 809                         u_error = -result;
 810                 }
 811                 else {
 812                         tcp->u_rval = result;
 813                         u_error = 0;
 814                 }
 815 #else /* !POWERPC */
 816 #ifdef M68K
 817                 if (d0 && (unsigned) -d0 < nerrnos) {
 818                         tcp->u_rval = -1;
 819                         u_error = -d0;
 820                 }
 821                 else {
 822                         tcp->u_rval = d0;
 823                         u_error = 0;
 824                 }
 825 #else /* !M68K */
 826 #ifdef ARM
 827                 if (r0 && (unsigned) -r0 < nerrnos) {
 828                         tcp->u_rval = -1;
 829                         u_error = -r0;
 830                 }
 831                 else {
 832                         tcp->u_rval = r0;
 833                         u_error = 0;
 834                 }
 835 #else /* !ARM */
 836 #ifdef ALPHA
 837                 if (a3) {
 838                         tcp->u_rval = -1;
 839                         u_error = r0;
 840                 }
 841                 else {
 842                         tcp->u_rval = r0;
 843                         u_error = 0;
 844                 }
 845 #else /* !ALPHA */
 846 #ifdef SPARC
 847                 if (regs.psr & PSR_C) {
 848                         tcp->u_rval = -1;
 849                         u_error = regs.u_regs[UREG_I0];
 850                 }
 851                 else {
 852                         tcp->u_rval = regs.u_regs[UREG_I0];
 853                         u_error = 0;
 854                 }
 855 #endif /* SPARC */
 856 #endif /* ALPHA */
 857 #endif /* ARM */
 858 #endif /* M68K */
 859 #endif /* POWERPC */
 860 #endif /* I386 */
 861 #endif /* LINUX */
 862 #ifdef SUNOS4
 863                 /* get error code from user struct */
 864                 if (upeek(pid, uoff(u_error), &u_error) < 0)
 865                         return -1;
 866                 u_error >>= 24; /* u_error is a char */
 867
 868                 /* get system call return value */
 869                 if (upeek(pid, uoff(u_rval1), &tcp->u_rval) < 0)
 870                         return -1;
 871 #endif /* SUNOS4 */
 872 #ifdef SVR4
 873 #ifdef SPARC
 874                 /* Judicious guessing goes a long way. */
 875                 if (tcp->status.pr_reg[R_PSR] & 0x100000) {
 876                         tcp->u_rval = -1;
 877                         u_error = tcp->status.pr_reg[R_O0];
 878                 }
 879                 else {
 880                         tcp->u_rval = tcp->status.pr_reg[R_O0];
 881                         u_error = 0;
 882                 }
 883 #endif /* SPARC */
 884 #ifdef I386
 885                 /* Wanna know how to kill an hour single-stepping? */
 886                 if (tcp->status.pr_reg[EFL] & 0x1) {
 887                         tcp->u_rval = -1;
 888                         u_error = tcp->status.pr_reg[EAX];
 889                 }
 890                 else {
 891                         tcp->u_rval = tcp->status.pr_reg[EAX];
 892                         u_error = 0;
 893                 }
 894 #endif /* I386 */
 895 #ifdef MIPS
 896                 if (tcp->status.pr_reg[CTX_A3]) {
 897                         tcp->u_rval = -1;
 898                         u_error = tcp->status.pr_reg[CTX_V0];
 899                 }
 900                 else {
 901                         tcp->u_rval = tcp->status.pr_reg[CTX_V0];
 902                         u_error = 0;
 903                 }
 904 #endif /* MIPS */
 905 #endif /* SVR4 */
 906                 tcp->u_error = u_error;
 907
 908                 internal_syscall(tcp);
 909                 if (!(qual_flags[tcp->scno] & QUAL_TRACE)) {
 910                         tcp->flags &= ~TCB_INSYSCALL;
 911                         return 0;
 912                 }
 913
 914                 if (tcp->flags & TCB_REPRINT) {
 915                         printleader(tcp);
 916                         tprintf("<... ");
 917                         if (tcp->scno >= nsyscalls)
 918                                 tprintf("syscall_%lu", tcp->scno);
 919                         else
 920                                 tprintf("%s", sysent[tcp->scno].sys_name);
 921                         tprintf(" resumed> ");
 922                 }
 923
 924                 if (cflag) {
 925                         call_count[tcp->scno]++;
 926                         if (u_error)
 927                                 error_count[tcp->scno]++;
 928                         tv_sub(&tv, &tv, &tcp->etime);
 929 #ifdef LINUX
 930                         if (tv_cmp(&tv, &tcp->dtime) > 0) {
 931                                 static struct timeval one_tick =
 932                                         { 0, 1000000 / HZ };
 933
 934                                 if (tv_nz(&tcp->dtime))
 935                                         tv = tcp->dtime;
 936                                 else if (tv_cmp(&tv, &one_tick) > 0) {
 937                                         if (tv_cmp(&shortest, &one_tick) < 0)
 938                                                 tv = shortest;
 939                                         else
 940                                                 tv = one_tick;
 941                                 }
 942                         }
 943 #endif /* LINUX */
 944                         if (tv_cmp(&tv, &shortest) < 0)
 945                                 shortest = tv;
 946                         tv_add(&tv_count[tcp->scno],
 947                                 &tv_count[tcp->scno], &tv);
 948                         tcp->flags &= ~TCB_INSYSCALL;
 949                         return 0;
 950                 }
 951
 952                 if (tcp->scno >= nsyscalls
 953                     || (qual_flags[tcp->scno] & QUAL_RAW))
 954                         sys_res = printargs(tcp);
 955                 else
 956                         sys_res = (*sysent[tcp->scno].sys_func)(tcp);
 957                 u_error = tcp->u_error;
 958                 tprintf(") ");
 959                 tabto(acolumn);
 960                 if (qual_flags[tcp->scno] & QUAL_RAW) {
 961                         if (u_error)
 962                                 tprintf("= -1 (errno %ld)", u_error);
 963                         else
 964                                 tprintf("= %#lx", tcp->u_rval);
 965                 }
 966                 else if (!(sys_res & RVAL_NONE) && u_error) {
 967 #ifdef LINUX
 968                         switch (u_error) {
 969                         case ERESTARTSYS:
 970                                 tprintf("= ? ERESTARTSYS (To be restarted)");
 971                                 break;
 972                         case ERESTARTNOINTR:
 973                                 tprintf("= ? ERESTARTNOINTR (To be restarted)");
 974                                 break;
 975                         case ERESTARTNOHAND:
 976                                 tprintf("= ? ERESTARTNOHAND (To be restarted)");
 977                                 break;
 978                         default:
 979 #endif /* LINUX */
 980                                 tprintf("= -1 ");
 981                                 if (u_error < nerrnos && u_error < sys_nerr)
 982                                         tprintf("%s (%s)", errnoent[u_error],
 983                                                 sys_errlist[u_error]);
 984                                 else if (u_error < nerrnos)
 985                                         tprintf("%s (errno %ld)",
 986                                                 errnoent[u_error], u_error);
 987                                 else if (u_error < sys_nerr)
 988                                         tprintf("ERRNO_%ld (%s)", u_error,
 989                                                 sys_errlist[u_error]);
 990                                 else
 991                                         tprintf("E??? (errno %ld)", u_error);
 992 #ifdef LINUX
 993                                 break;
 994                         }
 995 #endif /* LINUX */
 996                 }
 997                 else {
 998                         if (sys_res & RVAL_NONE)
 999                                 tprintf("= ?");
1000                         else {
1001                                 switch (sys_res & RVAL_MASK) {
1002                                 case RVAL_HEX:
1003                                         tprintf("= %#lx", tcp->u_rval);
1004                                         break;
1005                                 case RVAL_OCTAL:
1006                                         tprintf("= %#lo", tcp->u_rval);
1007                                         break;
1008                                 case RVAL_UDECIMAL:
1009                                         tprintf("= %lu", tcp->u_rval);
1010                                         break;
1011                                 case RVAL_DECIMAL:
1012                                         tprintf("= %ld", tcp->u_rval);
1013                                         break;
1014                                 default:
1015                                         fprintf(stderr,
1016                                                 "invalid rval format\n");
1017                                         break;
1018                                 }
1019                         }
1020                         if ((sys_res & RVAL_STR) && tcp->auxstr)
1021                                 tprintf(" (%s)", tcp->auxstr);
1022                 }
1023                 if (dtime) {
1024                         tv_sub(&tv, &tv, &tcp->etime);
1025                         tprintf(" <%ld.%06ld>",
1026                                 (long) tv.tv_sec, (long) tv.tv_usec);
1027                 }
1028                 printtrailer(tcp);
1029
1030                 dumpio(tcp);
1031                 if (fflush(tcp->outf) == EOF)
1032                         return -1;
1033                 tcp->flags &= ~TCB_INSYSCALL;
1034                 return 0;
1035         }
1036
1037         /* Entering system call */
1038         tcp->scno = scno;
1039 #ifdef LINUX
1040 #if defined (ALPHA)
1041         {
1042                 int i;
1043                 tcp->u_nargs = sysent[tcp->scno].nargs;
1044                 for (i = 0; i < tcp->u_nargs; i++) {
1045                         /* WTA: if scno is out-of-bounds this will bomb. Add range-check
1046                          * for scno somewhere above here!
1047                          */
1048                         if (upeek(pid, REG_A0+i, &tcp->u_arg[i]) < 0)
1049                                 return -1;
1050                 }
1051         }
1052 #elif defined (POWERPC)
1053         {
1054                 int i;
1055                 tcp->u_nargs = sysent[tcp->scno].nargs;
1056                 for (i = 0; i < tcp->u_nargs; i++) {
1057                         if (upeek(pid, (i==0) ? (4*PT_ORIG_R3) : ((i+PT_R3)*4), &tcp->u_arg[i]) < 0)
1058                                 return -1;
1059                 }
1060         }
1061 #elif defined (SPARC)
1062         {
1063                 int i, offset;
1064
1065                 offset = UREG_I0;
1066                 tcp->u_nargs = sysent[tcp->scno].nargs;
1067                 for (i = 0; i < tcp->u_nargs; i++)
1068                         tcp->u_arg[i] = regs.u_regs[offset + i];
1069         }
1070 #else
1071         {
1072                 int i;
1073                 tcp->u_nargs = sysent[tcp->scno].nargs;
1074                 for (i = 0; i < tcp->u_nargs; i++) {
1075                         if (upeek(pid, i*4, &tcp->u_arg[i]) < 0)
1076                                 return -1;
1077                 }
1078         }
1079 #endif
1080 #endif /* LINUX */
1081 #ifdef SUNOS4
1082         {
1083                 int i;
1084                 tcp->u_nargs = sysent[tcp->scno].nargs;
1085                 for (i = 0; i < tcp->u_nargs; i++) {
1086                         struct user *u;
1087
1088                         if (upeek(pid, uoff(u_arg[0]) +
1089                             (i*sizeof(u->u_arg[0])), &tcp->u_arg[i]) < 0)
1090                                 return -1;
1091                 }
1092         }
1093 #endif /* SUNOS4 */
1094 #ifdef SVR4
1095 #ifdef MIPS
1096         /*
1097          * SGI is broken: even though it has pr_sysarg, it doesn't
1098          * set them on system call entry.  Get a clue.
1099          */
1100         if (sysent[tcp->scno].nargs != -1)
1101                 tcp->u_nargs = sysent[tcp->scno].nargs;
1102         else
1103                 tcp->u_nargs = tcp->status.pr_nsysarg;
1104         if (tcp->u_nargs > 4) {
1105                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1106                         4*sizeof(tcp->u_arg[0]));
1107                 umoven(tcp, tcp->status.pr_reg[CTX_SP] + 16,
1108                         (tcp->u_nargs - 4)*sizeof(tcp->u_arg[0]), (char *) (tcp->u_arg + 4));
1109         }
1110         else {
1111                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1112                         tcp->u_nargs*sizeof(tcp->u_arg[0]));
1113         }
1114 #else /* !MIPS */
1115 #ifdef HAVE_PR_SYSCALL
1116         if (sysent[tcp->scno].nargs != -1)
1117                 tcp->u_nargs = sysent[tcp->scno].nargs;
1118         else
1119                 tcp->u_nargs = tcp->status.pr_nsysarg;
1120         {
1121                 int i;
1122                 for (i = 0; i < tcp->u_nargs; i++)
1123                         tcp->u_arg[i] = tcp->status.pr_sysarg[i];
1124         }
1125 #else /* !HAVE_PR_SYSCALL */
1126 #ifdef I386
1127         if (sysent[tcp->scno].nargs != -1)
1128                 tcp->u_nargs = sysent[tcp->scno].nargs;
1129         else
1130                 tcp->u_nargs = 5;
1131         umoven(tcp, tcp->status.pr_reg[UESP] + 4,
1132                 tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
1133 #endif /* I386 */
1134 #endif /* !HAVE_PR_SYSCALL */
1135 #endif /* !MIPS */
1136 #endif /* SVR4 */
1137 #ifdef __arm__
1138         switch (tcp->scno + __NR_SYSCALL_BASE) {
1139 #else
1140         switch (tcp->scno) {
1141 #endif
1142 #ifdef LINUX
1143 #if !defined (ALPHA) && !defined(SPARC)
1144         case SYS_socketcall:
1145                 decode_subcall(tcp, SYS_socket_subcall,
1146                         SYS_socket_nsubcalls, deref_style);
1147                 break;
1148         case SYS_ipc:
1149                 decode_subcall(tcp, SYS_ipc_subcall,
1150                         SYS_ipc_nsubcalls, shift_style);
1151                 break;
1152 #endif /* !ALPHA && !SPARC */
1153 #ifdef SPARC
1154         case SYS_socketcall:
1155                 sparc_socket_decode (tcp);
1156                 break;
1157 #endif
1158 #endif /* LINUX */
1159 #ifdef SVR4
1160 #ifdef SYS_pgrpsys_subcall
1161         case SYS_pgrpsys:
1162                 decode_subcall(tcp, SYS_pgrpsys_subcall,
1163                         SYS_pgrpsys_nsubcalls, shift_style);
1164                 break;
1165 #endif /* SYS_pgrpsys_subcall */
1166 #ifdef SYS_sigcall_subcall
1167         case SYS_sigcall:
1168                 decode_subcall(tcp, SYS_sigcall_subcall,
1169                         SYS_sigcall_nsubcalls, mask_style);
1170                 break;
1171 #endif /* SYS_sigcall_subcall */
1172         case SYS_msgsys:
1173                 decode_subcall(tcp, SYS_msgsys_subcall,
1174                         SYS_msgsys_nsubcalls, shift_style);
1175                 break;
1176         case SYS_shmsys:
1177                 decode_subcall(tcp, SYS_shmsys_subcall,
1178                         SYS_shmsys_nsubcalls, shift_style);
1179                 break;
1180         case SYS_semsys:
1181                 decode_subcall(tcp, SYS_semsys_subcall,
1182                         SYS_semsys_nsubcalls, shift_style);
1183                 break;
1184 #if 0 /* broken */
1185         case SYS_utssys:
1186                 decode_subcall(tcp, SYS_utssys_subcall,
1187                         SYS_utssys_nsubcalls, shift_style);
1188                 break;
1189 #endif
1190         case SYS_sysfs:
1191                 decode_subcall(tcp, SYS_sysfs_subcall,
1192                         SYS_sysfs_nsubcalls, shift_style);
1193                 break;
1194         case SYS_spcall:
1195                 decode_subcall(tcp, SYS_spcall_subcall,
1196                         SYS_spcall_nsubcalls, shift_style);
1197                 break;
1198 #ifdef SYS_context_subcall
1199         case SYS_context:
1200                 decode_subcall(tcp, SYS_context_subcall,
1201                         SYS_context_nsubcalls, shift_style);
1202                 break;
1203 #endif /* SYS_context_subcall */
1204 #endif /* SVR4 */
1205 #ifdef SUNOS4
1206         case SYS_semsys:
1207                 decode_subcall(tcp, SYS_semsys_subcall,
1208                         SYS_semsys_nsubcalls, shift_style);
1209                 break;
1210         case SYS_msgsys:
1211                 decode_subcall(tcp, SYS_msgsys_subcall,
1212                         SYS_msgsys_nsubcalls, shift_style);
1213                 break;
1214         case SYS_shmsys:
1215                 decode_subcall(tcp, SYS_shmsys_subcall,
1216                         SYS_shmsys_nsubcalls, shift_style);
1217                 break;
1218 #endif
1219         }
1220
1221         internal_syscall(tcp);
1222         if (!(qual_flags[tcp->scno] & QUAL_TRACE)) {
1223                 tcp->flags |= TCB_INSYSCALL;
1224                 return 0;
1225         }
1226
1227         if (cflag) {
1228                 gettimeofday(&tcp->etime, NULL);
1229                 tcp->flags |= TCB_INSYSCALL;
1230                 return 0;
1231         }
1232
1233         printleader(tcp);
1234         tcp->flags &= ~TCB_REPRINT;
1235         tcp_last = tcp;
1236         if (tcp->scno >= nsyscalls)
1237                 tprintf("syscall_%lu(", tcp->scno);
1238         else
1239                 tprintf("%s(", sysent[tcp->scno].sys_name);
1240         if (tcp->scno >= nsyscalls ||
1241             ((qual_flags[tcp->scno] & QUAL_RAW) && tcp->scno != SYS_exit))
1242                 sys_res = printargs(tcp);
1243         else
1244                 sys_res = (*sysent[tcp->scno].sys_func)(tcp);
1245         if (fflush(tcp->outf) == EOF)
1246                 return -1;
1247         tcp->flags |= TCB_INSYSCALL;
1248         /* Measure the entrance time as late as possible to avoid errors. */
1249         if (dtime)
1250                 gettimeofday(&tcp->etime, NULL);
1251         return sys_res;
1252 }
1253
1254 int
1255 printargs(tcp)
1256 struct tcb *tcp;
1257 {
1258         if (entering(tcp)) {
1259                 int i;
1260
1261                 for (i = 0; i < tcp->u_nargs; i++)
1262                         tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
1263         }
1264         return 0;
1265 }
1266
1267 long
1268 getrval2(tcp)
1269 struct tcb *tcp;
1270 {
1271         long val = -1;
1272
1273 #ifdef LINUX
1274 #ifdef SPARC
1275         struct pt_regs regs;
1276         if (ptrace(PTRACE_GETREGS,tcp->pid,(char *)&regs,0) < 0)
1277                 return -1;
1278         val = regs.u_regs[UREG_I1];
1279 #endif /* SPARC */
1280 #endif /* LINUX */
1281
1282 #ifdef SUNOS4
1283         if (upeek(tcp->pid, uoff(u_rval2), &val) < 0)
1284                 return -1;
1285 #endif /* SUNOS4 */
1286
1287 #ifdef SVR4
1288 #ifdef SPARC
1289         val = tcp->status.pr_reg[R_O1];
1290 #endif /* SPARC */
1291 #ifdef I386
1292         val = tcp->status.pr_reg[EDX];
1293 #endif /* I386 */
1294 #ifdef MIPS
1295         val = tcp->status.pr_reg[CTX_V1];
1296 #endif /* MIPS */
1297 #endif /* SVR4 */
1298
1299         return val;
1300 }
1301
1302 /*
1303  * Apparently, indirect system calls have already be converted by ptrace(2),
1304  * so if you see "indir" this program has gone astray.
1305  */
1306 int
1307 sys_indir(tcp)
1308 struct tcb *tcp;
1309 {
1310         int i, scno, nargs;
1311
1312         if (entering(tcp)) {
1313                 if ((scno = tcp->u_arg[0]) > nsyscalls) {
1314                         fprintf(stderr, "Bogus syscall: %u\n", scno);
1315                         return 0;
1316                 }
1317                 nargs = sysent[scno].nargs;
1318                 tprintf("%s", sysent[scno].sys_name);
1319                 for (i = 0; i < nargs; i++)
1320                         tprintf(", %#lx", tcp->u_arg[i+1]);
1321         }
1322         return 0;
1323 }
1324
1325 static int
1326 time_cmp(a, b)
1327 void *a;
1328 void *b;
1329 {
1330         return -tv_cmp(&tv_count[*((int *) a)], &tv_count[*((int *) b)]);
1331 }
1332
1333 static int
1334 syscall_cmp(a, b)
1335 void *a;
1336 void *b;
1337 {
1338         return strcmp(sysent[*((int *) a)].sys_name,
1339                 sysent[*((int *) b)].sys_name);
1340 }
1341
1342 static int
1343 count_cmp(a, b)
1344 void *a;
1345 void *b;
1346 {
1347         int m = call_count[*((int *) a)], n = call_count[*((int *) b)];
1348
1349         return (m < n) ? 1 : (m > n) ? -1 : 0;
1350 }
1351
1352 static int (*sortfun)();
1353 static struct timeval overhead = { -1, -1 };
1354
1355 void
1356 set_sortby(sortby)
1357 char *sortby;
1358 {
1359         if (strcmp(sortby, "time") == 0)
1360                 sortfun = time_cmp;
1361         else if (strcmp(sortby, "calls") == 0)
1362                 sortfun = count_cmp;
1363         else if (strcmp(sortby, "name") == 0)
1364                 sortfun = syscall_cmp;
1365         else if (strcmp(sortby, "nothing") == 0)
1366                 sortfun = NULL;
1367         else {
1368                 fprintf(stderr, "invalid sortby: `%s'\n", sortby);
1369                 exit(1);
1370         }
1371 }
1372
1373 void set_overhead(n)
1374 int n;
1375 {
1376         overhead.tv_sec = n / 1000000;
1377         overhead.tv_usec = n % 1000000;
1378 }
1379
1380 void
1381 call_summary(outf)
1382 FILE *outf;
1383 {
1384         int i, j;
1385         int call_cum, error_cum;
1386         struct timeval tv_cum, dtv;
1387         double percent;
1388         char *dashes = "-------------------------";
1389         char error_str[16];
1390
1391         call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0;
1392         if (overhead.tv_sec == -1) {
1393                 tv_mul(&overhead, &shortest, 8);
1394                 tv_div(&overhead, &overhead, 10);
1395         }
1396         for (i = 0; i < nsyscalls; i++) {
1397                 sorted_count[i] = i;
1398                 if (call_count[i] == 0)
1399                         continue;
1400                 tv_mul(&dtv, &overhead, call_count[i]);
1401                 tv_sub(&tv_count[i], &tv_count[i], &dtv);
1402                 call_cum += call_count[i];
1403                 error_cum += error_count[i];
1404                 tv_add(&tv_cum, &tv_cum, &tv_count[i]);
1405         }
1406         if (sortfun)
1407                 qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun);
1408         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n",
1409                 "% time", "seconds", "usecs/call",
1410                 "calls", "errors", "syscall");
1411         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
1412                 dashes, dashes, dashes, dashes, dashes, dashes);
1413         for (i = 0; i < nsyscalls; i++) {
1414                 j = sorted_count[i];
1415                 if (call_count[j] == 0)
1416                         continue;
1417                 tv_div(&dtv, &tv_count[j], call_count[j]);
1418                 if (error_count[j])
1419                         sprintf(error_str, "%d", error_count[j]);
1420                 else
1421                         error_str[0] = '\0';
1422                 percent = 100.0*tv_float(&tv_count[j])/tv_float(&tv_cum);
1423                 fprintf(outf, "%6.2f %4ld.%06ld %11ld %9d %9.9s %s\n",
1424                         percent, (long) tv_count[j].tv_sec,
1425                         (long) tv_count[j].tv_usec,
1426                         (long) 1000000 * dtv.tv_sec + dtv.tv_usec,
1427                         call_count[j], error_str, sysent[j].sys_name);
1428         }
1429         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
1430                 dashes, dashes, dashes, dashes, dashes, dashes);
1431         if (error_cum)
1432                 sprintf(error_str, "%d", error_cum);
1433         else
1434                 error_str[0] = '\0';
1435         fprintf(outf, "%6.6s %4ld.%06ld %11.11s %9d %9.9s %s\n",
1436                 "100.00", (long) tv_cum.tv_sec, (long) tv_cum.tv_usec, "",
1437                 call_cum, error_str, "total");
1438 }