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 #include <asm/reg.h>
  47 #endif
  48
  49 #if HAVE_LINUX_PTRACE_H
  50 #undef PTRACE_SYSCALL
  51 #include <linux/ptrace.h>
  52 #endif
  53
  54 #ifdef HAVE_SYS_REG_H
  55 #include <sys/reg.h>
  56 #ifndef PTRACE_PEEKUSR
  57 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
  58 #endif
  59 #endif
  60
  61 #ifndef SYS_ERRLIST_DECLARED
  62 extern int sys_nerr;
  63 extern char *sys_errlist[];
  64 #endif /* SYS_ERRLIST_DECLARED */
  65
  66 #ifdef LINUX
  67 #ifndef ERESTARTSYS
  68 #define ERESTARTSYS     512
  69 #endif
  70 #ifndef ERESTARTNOINTR
  71 #define ERESTARTNOINTR  513
  72 #endif
  73 #ifndef ERESTARTNOHAND
  74 #define ERESTARTNOHAND  514     /* restart if no handler.. */
  75 #endif
  76 #ifndef ENOIOCTLCMD
  77 #define ENOIOCTLCMD     515     /* No ioctl command */
  78 #endif
  79 #ifndef NSIG
  80 #define NSIG 32
  81 #endif
  82 #ifdef ARM
  83 #undef NSIG
  84 #define NSIG 32
  85 #endif
  86 #endif /* LINUX */
  87
  88 #include "syscall.h"
  89
  90 /* Define these shorthand notations to simplify the syscallent files. */
  91 #define TF TRACE_FILE
  92 #define TI TRACE_IPC
  93 #define TN TRACE_NETWORK
  94 #define TP TRACE_PROCESS
  95 #define TS TRACE_SIGNAL
  96
  97 struct sysent sysent0[] = {
  98 #include "syscallent.h"
  99 };
 100 int nsyscalls0 = sizeof sysent0 / sizeof sysent0[0];
 101
 102 #if SUPPORTED_PERSONALITIES >= 2
 103 struct sysent sysent1[] = {
 104 #include "syscallent1.h"
 105 };
 106 int nsyscalls1 = sizeof sysent1 / sizeof sysent1[0];
 107 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 108
 109 #if SUPPORTED_PERSONALITIES >= 3
 110 struct sysent sysent2[] = {
 111 #include "syscallent2.h"
 112 };
 113 int nsyscalls2 = sizeof sysent2 / sizeof sysent2[0];
 114 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 115
 116 struct sysent *sysent;
 117 int nsyscalls;
 118
 119 /* Now undef them since short defines cause wicked namespace pollution. */
 120 #undef TF
 121 #undef TI
 122 #undef TN
 123 #undef TP
 124 #undef TS
 125
 126 char *errnoent0[] = {
 127 #include "errnoent.h"
 128 };
 129 int nerrnos0 = sizeof errnoent0 / sizeof errnoent0[0];
 130
 131 #if SUPPORTED_PERSONALITIES >= 2
 132 char *errnoent1[] = {
 133 #include "errnoent1.h"
 134 };
 135 int nerrnos1 = sizeof errnoent1 / sizeof errnoent1[0];
 136 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 137
 138 #if SUPPORTED_PERSONALITIES >= 3
 139 char *errnoent2[] = {
 140 #include "errnoent2.h"
 141 };
 142 int nerrnos2 = sizeof errnoent2 / sizeof errnoent2[0];
 143 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 144
 145 char **errnoent;
 146 int nerrnos;
 147
 148 int current_personality;
 149
 150 int
 151 set_personality(personality)
 152 int personality;
 153 {
 154         switch (personality) {
 155         case 0:
 156                 errnoent = errnoent0;
 157                 nerrnos = nerrnos0;
 158                 sysent = sysent0;
 159                 nsyscalls = nsyscalls0;
 160                 ioctlent = ioctlent0;
 161                 nioctlents = nioctlents0;
 162                 signalent = signalent0;
 163                 nsignals = nsignals0;
 164                 break;
 165
 166 #if SUPPORTED_PERSONALITIES >= 2
 167         case 1:
 168                 errnoent = errnoent1;
 169                 nerrnos = nerrnos1;
 170                 sysent = sysent1;
 171                 nsyscalls = nsyscalls1;
 172                 ioctlent = ioctlent1;
 173                 nioctlents = nioctlents1;
 174                 signalent = signalent1;
 175                 nsignals = nsignals1;
 176                 break;
 177 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 178
 179 #if SUPPORTED_PERSONALITIES >= 3
 180         case 2:
 181                 errnoent = errnoent2;
 182                 nerrnos = nerrnos2;
 183                 sysent = sysent2;
 184                 nsyscalls = nsyscalls2;
 185                 ioctlent = ioctlent2;
 186                 nioctlents = nioctlents2;
 187                 signalent = signalent2;
 188                 nsignals = nsignals2;
 189                 break;
 190 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 191
 192         default:
 193                 return -1;
 194         }
 195
 196         current_personality = personality;
 197         return 0;
 198 }
 199
 200 int qual_flags[MAX_QUALS];
 201
 202 static int call_count[MAX_QUALS];
 203 static int error_count[MAX_QUALS];
 204 static struct timeval tv_count[MAX_QUALS];
 205 static int sorted_count[MAX_QUALS];
 206
 207 static struct timeval shortest = { 1000000, 0 };
 208
 209 static int lookup_syscall(), lookup_signal(), lookup_fault(), lookup_desc();
 210
 211 static struct qual_options {
 212         int bitflag;
 213         char *option_name;
 214         int (*lookup)();
 215         char *argument_name;
 216 } qual_options[] = {
 217         { QUAL_TRACE,   "trace",        lookup_syscall, "system call"   },
 218         { QUAL_TRACE,   "t",            lookup_syscall, "system call"   },
 219         { QUAL_ABBREV,  "abbrev",       lookup_syscall, "system call"   },
 220         { QUAL_ABBREV,  "a",            lookup_syscall, "system call"   },
 221         { QUAL_VERBOSE, "verbose",      lookup_syscall, "system call"   },
 222         { QUAL_VERBOSE, "v",            lookup_syscall, "system call"   },
 223         { QUAL_RAW,     "raw",          lookup_syscall, "system call"   },
 224         { QUAL_RAW,     "x",            lookup_syscall, "system call"   },
 225         { QUAL_SIGNAL,  "signal",       lookup_signal,  "signal"        },
 226         { QUAL_SIGNAL,  "signals",      lookup_signal,  "signal"        },
 227         { QUAL_SIGNAL,  "s",            lookup_signal,  "signal"        },
 228         { QUAL_FAULT,   "fault",        lookup_fault,   "fault"         },
 229         { QUAL_FAULT,   "faults",       lookup_fault,   "fault"         },
 230         { QUAL_FAULT,   "m",            lookup_fault,   "fault"         },
 231         { QUAL_READ,    "read",         lookup_desc,    "descriptor"    },
 232         { QUAL_READ,    "reads",        lookup_desc,    "descriptor"    },
 233         { QUAL_READ,    "r",            lookup_desc,    "descriptor"    },
 234         { QUAL_WRITE,   "write",        lookup_desc,    "descriptor"    },
 235         { QUAL_WRITE,   "writes",       lookup_desc,    "descriptor"    },
 236         { QUAL_WRITE,   "w",            lookup_desc,    "descriptor"    },
 237         { 0,            NULL,           NULL,           NULL            },
 238 };
 239
 240 static int
 241 lookup_syscall(s)
 242 char *s;
 243 {
 244         int i;
 245
 246         for (i = 0; i < nsyscalls; i++) {
 247                 if (strcmp(s, sysent[i].sys_name) == 0)
 248                         return i;
 249         }
 250         return -1;
 251 }
 252
 253 static int
 254 lookup_signal(s)
 255 char *s;
 256 {
 257         int i;
 258         char buf[32];
 259
 260         if (s && *s && isdigit(*s))
 261                 return atoi(s);
 262         strcpy(buf, s);
 263         s = buf;
 264         for (i = 0; s[i]; i++)
 265                 s[i] = toupper(s[i]);
 266         if (strncmp(s, "SIG", 3) == 0)
 267                 s += 3;
 268         for (i = 0; i <= NSIG; i++) {
 269                 if (strcmp(s, signame(i) + 3) == 0)
 270                         return i;
 271         }
 272         return -1;
 273 }
 274
 275 static int
 276 lookup_fault(s)
 277 char *s;
 278 {
 279         return -1;
 280 }
 281
 282 static int
 283 lookup_desc(s)
 284 char *s;
 285 {
 286         if (s && *s && isdigit(*s))
 287                 return atoi(s);
 288         return -1;
 289 }
 290
 291 static int
 292 lookup_class(s)
 293 char *s;
 294 {
 295         if (strcmp(s, "file") == 0)
 296                 return TRACE_FILE;
 297         if (strcmp(s, "ipc") == 0)
 298                 return TRACE_IPC;
 299         if (strcmp(s, "network") == 0)
 300                 return TRACE_NETWORK;
 301         if (strcmp(s, "process") == 0)
 302                 return TRACE_PROCESS;
 303         if (strcmp(s, "signal") == 0)
 304                 return TRACE_SIGNAL;
 305         return -1;
 306 }
 307
 308 void
 309 qualify(s)
 310 char *s;
 311 {
 312         struct qual_options *opt;
 313         int not;
 314         char *p;
 315         int i, n;
 316
 317         opt = &qual_options[0];
 318         for (i = 0; (p = qual_options[i].option_name); i++) {
 319                 n = strlen(p);
 320                 if (strncmp(s, p, n) == 0 && s[n] == '=') {
 321                         opt = &qual_options[i];
 322                         s += n + 1;
 323                         break;
 324                 }
 325         }
 326         not = 0;
 327         if (*s == '!') {
 328                 not = 1;
 329                 s++;
 330         }
 331         if (strcmp(s, "none") == 0) {
 332                 not = 1 - not;
 333                 s = "all";
 334         }
 335         if (strcmp(s, "all") == 0) {
 336                 for (i = 0; i < MAX_QUALS; i++) {
 337                         if (not)
 338                                 qual_flags[i] &= ~opt->bitflag;
 339                         else
 340                                 qual_flags[i] |= opt->bitflag;
 341                 }
 342                 return;
 343         }
 344         for (i = 0; i < MAX_QUALS; i++) {
 345                 if (not)
 346                         qual_flags[i] |= opt->bitflag;
 347                 else
 348                         qual_flags[i] &= ~opt->bitflag;
 349         }
 350         for (p = strtok(s, ","); p; p = strtok(NULL, ",")) {
 351                 if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
 352                         for (i = 0; i < MAX_QUALS; i++) {
 353                                 if (sysent[i].sys_flags & n) {
 354                                         if (not)
 355                                                 qual_flags[i] &= ~opt->bitflag;
 356                                         else
 357                                                 qual_flags[i] |= opt->bitflag;
 358                                 }
 359                         }
 360                         continue;
 361                 }
 362                 if ((n = (*opt->lookup)(p)) < 0) {
 363                         fprintf(stderr, "strace: invalid %s `%s'\n",
 364                                 opt->argument_name, p);
 365                         exit(1);
 366                 }
 367                 if (not)
 368                         qual_flags[n] &= ~opt->bitflag;
 369                 else
 370                         qual_flags[n] |= opt->bitflag;
 371         }
 372         return;
 373 }
 374
 375 static void
 376 dumpio(tcp)
 377 struct tcb *tcp;
 378 {
 379         if (syserror(tcp))
 380                 return;
 381         if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= MAX_QUALS)
 382                 return;
 383 #ifdef __arm__
 384         switch (tcp->scno + __NR_SYSCALL_BASE) {
 385 #else
 386         switch (tcp->scno) {
 387 #endif
 388         case SYS_read:
 389 #ifdef SYS_recv
 390         case SYS_recv:
 391 #endif
 392 #ifdef SYS_recvfrom
 393         case SYS_recvfrom:
 394 #endif
 395                 if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
 396                         dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
 397                 break;
 398         case SYS_write:
 399 #ifdef SYS_send
 400         case SYS_send:
 401 #endif
 402 #ifdef SYS_sendto
 403         case SYS_sendto:
 404 #endif
 405                 if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
 406                         dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 407                 break;
 408         }
 409 }
 410
 411 enum subcall_style { shift_style, deref_style, mask_style, door_style };
 412
 413 #if !(defined(LINUX) && ( defined(ALPHA) || defined(MIPS) ))
 414
 415 const int socket_map [] = {
 416                /* SYS_SOCKET      */ 97,
 417                /* SYS_BIND        */ 104,
 418                /* SYS_CONNECT     */ 98,
 419                /* SYS_LISTEN      */ 106,
 420                /* SYS_ACCEPT      */ 99,
 421                /* SYS_GETSOCKNAME */ 150,
 422                /* SYS_GETPEERNAME */ 141,
 423                /* SYS_SOCKETPAIR  */ 135,
 424                /* SYS_SEND        */ 101,
 425                /* SYS_RECV        */ 102,
 426                /* SYS_SENDTO      */ 133,
 427                /* SYS_RECVFROM    */ 125,
 428                /* SYS_SHUTDOWN    */ 134,
 429                /* SYS_SETSOCKOPT  */ 105,
 430                /* SYS_GETSOCKOPT  */ 118,
 431                /* SYS_SENDMSG     */ 114,
 432                /* SYS_RECVMSG     */ 113
 433 };
 434
 435 void
 436 sparc_socket_decode (tcp)
 437 struct tcb *tcp;
 438 {
 439         volatile long addr;
 440         volatile int i, n;
 441
 442         if (tcp->u_arg [0] < 1 || tcp->u_arg [0] > sizeof(socket_map)/sizeof(int)+1){
 443                 return;
 444         }
 445         tcp->scno = socket_map [tcp->u_arg [0]-1];
 446         n = tcp->u_nargs = sysent [tcp->scno].nargs;
 447         addr = tcp->u_arg [1];
 448         for (i = 0; i < n; i++){
 449                 int arg;
 450                 if (umoven (tcp, addr, sizeof (arg), (void *) &arg) < 0)
 451                         arg = 0;
 452                 tcp->u_arg [i] = arg;
 453                 addr += sizeof (arg);
 454         }
 455 }
 456
 457 static void
 458 decode_subcall(tcp, subcall, nsubcalls, style)
 459 struct tcb *tcp;
 460 int subcall;
 461 int nsubcalls;
 462 enum subcall_style style;
 463 {
 464         int i, addr, mask, arg;
 465
 466         if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
 467                 return;
 468         switch (style) {
 469         case shift_style:
 470                 tcp->scno = subcall + tcp->u_arg[0];
 471                 if (sysent[tcp->scno].nargs != -1)
 472                         tcp->u_nargs = sysent[tcp->scno].nargs;
 473                 else
 474                         tcp->u_nargs--;
 475                 for (i = 0; i < tcp->u_nargs; i++)
 476                         tcp->u_arg[i] = tcp->u_arg[i + 1];
 477                 break;
 478         case deref_style:
 479                 tcp->scno = subcall + tcp->u_arg[0];
 480                 addr = tcp->u_arg[1];
 481                 for (i = 0; i < sysent[tcp->scno].nargs; i++) {
 482                         if (umove(tcp, addr, &arg) < 0)
 483                                 arg = 0;
 484                         tcp->u_arg[i] = arg;
 485                         addr += sizeof(arg);
 486                 }
 487                 tcp->u_nargs = sysent[tcp->scno].nargs;
 488                 break;
 489         case mask_style:
 490                 mask = (tcp->u_arg[0] >> 8) & 0xff;
 491                 tcp->u_arg[0] &= 0xff;
 492                 for (i = 0; mask; i++)
 493                         mask >>= 1;
 494                 tcp->scno = subcall + i;
 495                 if (sysent[tcp->scno].nargs != -1)
 496                         tcp->u_nargs = sysent[tcp->scno].nargs;
 497                 break;
 498         case door_style:
 499                 /*
 500                  * Oh, yuck.  The call code is the *sixth* argument.
 501                  */
 502                 tcp->scno = subcall + tcp->u_arg[5];
 503                 if (sysent[tcp->scno].nargs != -1)
 504                         tcp->u_nargs = sysent[tcp->scno].nargs;
 505                 else
 506                         tcp->u_nargs--;
 507                 break;
 508         }
 509 }
 510 #endif
 511
 512 struct tcb *tcp_last = NULL;
 513
 514 static int
 515 internal_syscall(tcp)
 516 struct tcb *tcp;
 517 {
 518         /*
 519          * We must always trace a few critical system calls in order to
 520          * correctly support following forks in the presence of tracing
 521          * qualifiers.
 522          */
 523 #ifdef __arm__
 524         switch (tcp->scno + __NR_SYSCALL_BASE) {
 525 #else
 526         switch (tcp->scno) {
 527 #endif
 528 #ifdef SYS_fork
 529         case SYS_fork:
 530 #endif
 531 #ifdef SYS_vfork
 532         case SYS_vfork:
 533 #endif
 534                 internal_fork(tcp);
 535                 break;
 536 #ifdef SYS_clone
 537         case SYS_clone:
 538                 internal_clone(tcp);
 539                 break;
 540 #endif
 541 #ifdef SYS_execv
 542         case SYS_execv:
 543 #endif
 544 #ifdef SYS_execve
 545         case SYS_execve:
 546 #endif
 547                 internal_exec(tcp);
 548                 break;
 549
 550 #ifdef SYS_wait
 551         case SYS_wait:
 552 #endif
 553 #ifdef SYS_wait4
 554         case SYS_wait4:
 555 #endif
 556 #ifdef SYS_waitpid
 557         case SYS_waitpid:
 558 #endif
 559 #ifdef SYS_waitsys
 560         case SYS_waitsys:
 561 #endif
 562                 internal_wait(tcp);
 563                 break;
 564
 565 #ifdef SYS_exit
 566         case SYS_exit:
 567 #endif
 568                 internal_exit(tcp);
 569                 break;
 570         }
 571         return 0;
 572 }
 573
 574 int
 575 trace_syscall(tcp)
 576 struct tcb *tcp;
 577 {
 578         int sys_res;
 579         struct timeval tv;
 580         long scno = 0;
 581 #ifdef LINUX
 582 #if defined (I386)
 583         long eax;
 584 #elif defined (POWERPC)
 585         long result,flags;
 586 #elif defined (M68K)
 587         int d0;
 588 #elif defined (ARM)
 589         int r0;
 590 #elif defined (ALPHA)
 591         long r0;
 592         long a3;
 593 #elif defined(MIPS)
 594         long r2,a3;
 595 #elif defined (SPARC)
 596         struct regs regs;
 597         unsigned long trap;
 598 #elif defined(S390)
 599         long gpr2;
 600         long pc;
 601 #endif
 602 #endif /* LINUX */
 603
 604 #ifndef SVR4
 605         int pid = tcp->pid;
 606 #endif /* !SVR4 */
 607
 608         /* Measure the exit time as early as possible to avoid errors. */
 609         if (dtime && (tcp->flags & TCB_INSYSCALL))
 610                 gettimeofday(&tv, NULL);
 611 #ifdef LINUX
 612 #if defined(S390)
 613         if (upeek(tcp->pid,PT_PSWADDR,&pc) < 0)
 614                 return -1;
 615         scno = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)(pc-4),0);
 616         if (errno)
 617                 return -1;
 618         scno&=0xFF;
 619 #elif defined (POWERPC)
 620         if (upeek(pid, 4*PT_R0, &scno) < 0)
 621                 return -1;
 622         if (!(tcp->flags & TCB_INSYSCALL)) {
 623                 /* Check if we return from execve. */
 624                 if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) {
 625                         tcp->flags &= ~TCB_WAITEXECVE;
 626                         return 0;
 627                 }
 628         }
 629 #elif defined (I386)
 630         if (upeek(pid, 4*ORIG_EAX, &scno) < 0)
 631                 return -1;
 632 #elif defined (ARM)
 633         {
 634             long pc;
 635             upeek(pid, 4*15, &pc);
 636             umoven(tcp, pc-4, 4, (char *)&scno);
 637             scno &= 0x000fffff;
 638         }
 639 #elif defined (M68K)
 640         if (upeek(pid, 4*PT_ORIG_D0, &scno) < 0)
 641                 return -1;
 642 #elif defined (MIPS)
 643         if (upeek(pid, REG_A3, &a3) < 0)
 644                 return -1;
 645
 646         if(!(tcp->flags & TCB_INSYSCALL)) {
 647                 if (upeek(pid, REG_V0, &scno) < 0)
 648                         return -1;
 649
 650                 if (scno < 0 || scno > nsyscalls) {
 651                         if(a3 == 0 || a3 == -1) {
 652                                 if(debug)
 653                                         fprintf (stderr, "stray syscall exit: v0 = %ld\n", scno);
 654                                 return 0;
 655                         }
 656                 }
 657         } else {
 658                 if (upeek(pid, REG_V0, &r2) < 0)
 659                         return -1;
 660         }
 661 #elif defined (ALPHA)
 662         if (upeek(pid, REG_A3, &a3) < 0)
 663                 return -1;
 664
 665         if (!(tcp->flags & TCB_INSYSCALL)) {
 666                 if (upeek(pid, REG_R0, &scno) < 0)
 667                         return -1;
 668
 669                 /* Check if we return from execve. */
 670                 if (scno == 0 && tcp->flags & TCB_WAITEXECVE) {
 671                         tcp->flags &= ~TCB_WAITEXECVE;
 672                         return 0;
 673                 }
 674
 675                 /*
 676                  * Do some sanity checks to figure out if it's
 677                  * really a syscall entry
 678                  */
 679                 if (scno < 0 || scno > nsyscalls) {
 680                         if (a3 == 0 || a3 == -1) {
 681                                 if (debug)
 682                                         fprintf (stderr, "stray syscall exit: r0 = %ld\n", scno);
 683                                 return 0;
 684                         }
 685                 }
 686         }
 687         else {
 688                 if (upeek(pid, REG_R0, &r0) < 0)
 689                         return -1;
 690         }
 691 #elif defined (SPARC)
 692         /* Everything we need is in the current register set. */
 693         if (ptrace(PTRACE_GETREGS,pid,(char *)&regs,0) < 0)
 694                 return -1;
 695
 696         /* If we are entering, then disassemble the syscall trap. */
 697         if (!(tcp->flags & TCB_INSYSCALL)) {
 698                 /* Retrieve the syscall trap instruction. */
 699                 errno = 0;
 700                 trap = ptrace(PTRACE_PEEKTEXT,pid,(char *)regs.r_pc,0);
 701                 if (errno)
 702                         return -1;
 703
 704                 /* Disassemble the trap to see what personality to use. */
 705                 switch (trap) {
 706                 case 0x91d02010:
 707                         /* Linux/SPARC syscall trap. */
 708                         set_personality(0);
 709                         break;
 710                 case 0x91d0206d:
 711                         /* Linux/SPARC64 syscall trap. */
 712                         fprintf(stderr,"syscall: Linux/SPARC64 not supported yet\n");
 713                         return -1;
 714                 case 0x91d02000:
 715                         /* SunOS syscall trap. (pers 1) */
 716                         fprintf(stderr,"syscall: SunOS no support\n");
 717                         return -1;
 718                 case 0x91d02008:
 719                         /* Solaris 2.x syscall trap. (per 2) */
 720                         set_personality(1);
 721                         break;
 722                 case 0x91d02009:
 723                         /* NetBSD/FreeBSD syscall trap. */
 724                         fprintf(stderr,"syscall: NetBSD/FreeBSD not supported\n");
 725                         return -1;
 726                 case 0x91d02027:
 727                         /* Solaris 2.x gettimeofday */
 728                         set_personality(1);
 729                         break;
 730                 default:
 731                         /* Unknown syscall trap. */
 732                         if(tcp->flags & TCB_WAITEXECVE) {
 733                                 tcp->flags &= ~TCB_WAITEXECVE;
 734                                 return 0;
 735                         }
 736                         fprintf(stderr,"syscall: unknown syscall trap %08x %08x\n", trap, regs.r_pc);
 737                         return -1;
 738                 }
 739
 740                 /* Extract the system call number from the registers. */
 741                 if (trap == 0x91d02027)
 742                         scno = 156;
 743                 else
 744                         scno = regs.r_g1;
 745                 if (scno == 0) {
 746                         scno = regs.r_o0;
 747                         memmove (&regs.r_o0, &regs.r_o1, 7*sizeof(regs.r_o0));
 748                 }
 749         }
 750 #endif
 751 #endif /* LINUX */
 752 #ifdef SUNOS4
 753         if (upeek(pid, uoff(u_arg[7]), &scno) < 0)
 754                 return -1;
 755 #endif
 756 #ifdef SVR4
 757 #ifdef HAVE_PR_SYSCALL
 758         scno = tcp->status.pr_syscall;
 759 #else /* !HAVE_PR_SYSCALL */
 760         scno = tcp->status.PR_WHAT;
 761 #endif /* !HAVE_PR_SYSCALL */
 762         if (!(tcp->flags & TCB_INSYSCALL)) {
 763                 if (tcp->status.PR_WHY != PR_SYSENTRY) {
 764                         if (
 765                             scno == SYS_fork
 766 #ifdef SYS_vfork
 767                             || scno == SYS_vfork
 768 #endif /* SYS_vfork */
 769                             ) {
 770                                 /* We are returning in the child, fake it. */
 771                                 tcp->status.PR_WHY = PR_SYSENTRY;
 772                                 trace_syscall(tcp);
 773                                 tcp->status.PR_WHY = PR_SYSEXIT;
 774                         }
 775                         else {
 776                                 fprintf(stderr, "syscall: missing entry\n");
 777                                 tcp->flags |= TCB_INSYSCALL;
 778                         }
 779                 }
 780         }
 781         else {
 782                 if (tcp->status.PR_WHY != PR_SYSEXIT) {
 783                         fprintf(stderr, "syscall: missing exit\n");
 784                         tcp->flags &= ~TCB_INSYSCALL;
 785                 }
 786         }
 787 #endif /* SVR4 */
 788 #ifdef SUNOS4
 789         if (!(tcp->flags & TCB_INSYSCALL)) {
 790                 if (scno == 0) {
 791                         fprintf(stderr, "syscall: missing entry\n");
 792                         tcp->flags |= TCB_INSYSCALL;
 793                 }
 794         }
 795         else {
 796                 if (scno != 0) {
 797                         if (debug) {
 798                                 /*
 799                                  * This happens when a signal handler
 800                                  * for a signal which interrupted a
 801                                  * a system call makes another system call.
 802                                  */
 803                                 fprintf(stderr, "syscall: missing exit\n");
 804                         }
 805                         tcp->flags &= ~TCB_INSYSCALL;
 806                 }
 807         }
 808 #endif /* SUNOS4 */
 809 #ifdef LINUX
 810 #if defined (I386)
 811         if (upeek(pid, 4*EAX, &eax) < 0)
 812                 return -1;
 813         if (eax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 814                 if (debug)
 815                         fprintf(stderr, "stray syscall exit: eax = %ld\n", eax);
 816                 return 0;
 817         }
 818 #elif defined (POWERPC)
 819 # define SO_MASK 0x10000000
 820         if (upeek(pid, 4*PT_CCR, &flags) < 0)
 821                 return -1;
 822         if (upeek(pid, 4*PT_R3, &result) < 0)
 823                 return -1;
 824         if (flags & SO_MASK)
 825                 result = -result;
 826 #elif defined (M68K)
 827         if (upeek(pid, 4*PT_D0, &d0) < 0)
 828                 return -1;
 829         if (d0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 830                 if (debug)
 831                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", d0);
 832                 return 0;
 833         }
 834 #elif defined (ARM)
 835         if (upeek(pid, 4*0, (long *)&r0) < 0)
 836                 return -1;
 837         if ( 0 && r0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 838                 if (debug)
 839                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", r0);
 840                 return 0;
 841         }
 842 #else
 843 #endif
 844 #endif /* LINUX */
 845
 846         if (tcp->flags & TCB_INSYSCALL) {
 847                 long u_error;
 848
 849 #ifdef LINUX
 850 #ifdef I386
 851                 if (eax < 0 && -eax < nerrnos) {
 852                         tcp->u_rval = -1;
 853                         u_error = -eax;
 854                 }
 855                 else {
 856                         tcp->u_rval = eax;
 857                         u_error = 0;
 858                 }
 859 #else /* !I386 */
 860 #ifdef MIPS
 861                 if (a3) {
 862                         tcp->u_rval = -1;
 863                         u_error = r2;
 864                 } else {
 865                         tcp->u_rval = r2;
 866                         u_error = 0;
 867                 }
 868 #else
 869 #ifdef POWERPC
 870                 if (result && (unsigned) -result < nerrnos) {
 871                         tcp->u_rval = -1;
 872                         u_error = -result;
 873                 }
 874                 else {
 875                         tcp->u_rval = result;
 876                         u_error = 0;
 877                 }
 878 #else /* !POWERPC */
 879 #ifdef M68K
 880                 if (d0 && (unsigned) -d0 < nerrnos) {
 881                         tcp->u_rval = -1;
 882                         u_error = -d0;
 883                 }
 884                 else {
 885                         tcp->u_rval = d0;
 886                         u_error = 0;
 887                 }
 888 #else /* !M68K */
 889 #ifdef ARM
 890                 if (r0 && (unsigned) -r0 < nerrnos) {
 891                         tcp->u_rval = -1;
 892                         u_error = -r0;
 893                 }
 894                 else {
 895                         tcp->u_rval = r0;
 896                         u_error = 0;
 897                 }
 898 #else /* !ARM */
 899 #ifdef ALPHA
 900                 if (a3) {
 901                         tcp->u_rval = -1;
 902                         u_error = r0;
 903                 }
 904                 else {
 905                         tcp->u_rval = r0;
 906                         u_error = 0;
 907                 }
 908 #else /* !ALPHA */
 909 #ifdef SPARC
 910                 if (regs.r_psr & PSR_C) {
 911                         tcp->u_rval = -1;
 912                         u_error = regs.r_o0;
 913                 }
 914                 else {
 915                         tcp->u_rval = regs.r_o0;
 916                         u_error = 0;
 917                 }
 918 #endif /* SPARC */
 919 #endif /* ALPHA */
 920 #endif /* ARM */
 921 #endif /* M68K */
 922 #endif /* POWERPC */
 923 #endif /* MIPS */
 924 #endif /* I386 */
 925 #endif /* LINUX */
 926 #ifdef SUNOS4
 927                 /* get error code from user struct */
 928                 if (upeek(pid, uoff(u_error), &u_error) < 0)
 929                         return -1;
 930                 u_error >>= 24; /* u_error is a char */
 931
 932                 /* get system call return value */
 933                 if (upeek(pid, uoff(u_rval1), &tcp->u_rval) < 0)
 934                         return -1;
 935 #endif /* SUNOS4 */
 936 #ifdef SVR4
 937 #ifdef SPARC
 938                 /* Judicious guessing goes a long way. */
 939                 if (tcp->status.pr_reg[R_PSR] & 0x100000) {
 940                         tcp->u_rval = -1;
 941                         u_error = tcp->status.pr_reg[R_O0];
 942                 }
 943                 else {
 944                         tcp->u_rval = tcp->status.pr_reg[R_O0];
 945                         u_error = 0;
 946                 }
 947 #endif /* SPARC */
 948 #ifdef I386
 949                 /* Wanna know how to kill an hour single-stepping? */
 950                 if (tcp->status.PR_REG[EFL] & 0x1) {
 951                         tcp->u_rval = -1;
 952                         u_error = tcp->status.PR_REG[EAX];
 953                 }
 954                 else {
 955                         tcp->u_rval = tcp->status.PR_REG[EAX];
 956                         u_error = 0;
 957                 }
 958 #endif /* I386 */
 959 #ifdef MIPS
 960                 if (tcp->status.pr_reg[CTX_A3]) {
 961                         tcp->u_rval = -1;
 962                         u_error = tcp->status.pr_reg[CTX_V0];
 963                 }
 964                 else {
 965                         tcp->u_rval = tcp->status.pr_reg[CTX_V0];
 966                         u_error = 0;
 967                 }
 968 #endif /* MIPS */
 969 #endif /* SVR4 */
 970                 tcp->u_error = u_error;
 971
 972                 internal_syscall(tcp);
 973                 if (!(qual_flags[tcp->scno] & QUAL_TRACE)) {
 974                         tcp->flags &= ~TCB_INSYSCALL;
 975                         return 0;
 976                 }
 977
 978                 if (tcp->flags & TCB_REPRINT) {
 979                         printleader(tcp);
 980                         tprintf("<... ");
 981                         if (tcp->scno >= nsyscalls)
 982                                 tprintf("syscall_%lu", tcp->scno);
 983                         else
 984                                 tprintf("%s", sysent[tcp->scno].sys_name);
 985                         tprintf(" resumed> ");
 986                 }
 987
 988                 if (cflag) {
 989                         call_count[tcp->scno]++;
 990                         if (u_error)
 991                                 error_count[tcp->scno]++;
 992                         tv_sub(&tv, &tv, &tcp->etime);
 993 #ifdef LINUX
 994                         if (tv_cmp(&tv, &tcp->dtime) > 0) {
 995                                 static struct timeval one_tick =
 996                                         { 0, 1000000 / HZ };
 997
 998                                 if (tv_nz(&tcp->dtime))
 999                                         tv = tcp->dtime;
1000                                 else if (tv_cmp(&tv, &one_tick) > 0) {
1001                                         if (tv_cmp(&shortest, &one_tick) < 0)
1002                                                 tv = shortest;
1003                                         else
1004                                                 tv = one_tick;
1005                                 }
1006                         }
1007 #endif /* LINUX */
1008                         if (tv_cmp(&tv, &shortest) < 0)
1009                                 shortest = tv;
1010                         tv_add(&tv_count[tcp->scno],
1011                                 &tv_count[tcp->scno], &tv);
1012                         tcp->flags &= ~TCB_INSYSCALL;
1013                         return 0;
1014                 }
1015
1016                 if (tcp->scno >= nsyscalls
1017                     || (qual_flags[tcp->scno] & QUAL_RAW))
1018                         sys_res = printargs(tcp);
1019                 else
1020                         sys_res = (*sysent[tcp->scno].sys_func)(tcp);
1021                 u_error = tcp->u_error;
1022                 tprintf(") ");
1023                 tabto(acolumn);
1024                 if (qual_flags[tcp->scno] & QUAL_RAW) {
1025                         if (u_error)
1026                                 tprintf("= -1 (errno %ld)", u_error);
1027                         else
1028                                 tprintf("= %#lx", tcp->u_rval);
1029                 }
1030                 else if (!(sys_res & RVAL_NONE) && u_error) {
1031 #ifdef LINUX
1032                         switch (u_error) {
1033                         case ERESTARTSYS:
1034                                 tprintf("= ? ERESTARTSYS (To be restarted)");
1035                                 break;
1036                         case ERESTARTNOINTR:
1037                                 tprintf("= ? ERESTARTNOINTR (To be restarted)");
1038                                 break;
1039                         case ERESTARTNOHAND:
1040                                 tprintf("= ? ERESTARTNOHAND (To be restarted)");
1041                                 break;
1042                         default:
1043 #endif /* LINUX */
1044                                 tprintf("= -1 ");
1045                                 if (u_error < nerrnos && u_error < sys_nerr)
1046                                         tprintf("%s (%s)", errnoent[u_error],
1047                                                 sys_errlist[u_error]);
1048                                 else if (u_error < nerrnos)
1049                                         tprintf("%s (errno %ld)",
1050                                                 errnoent[u_error], u_error);
1051                                 else if (u_error < sys_nerr)
1052                                         tprintf("ERRNO_%ld (%s)", u_error,
1053                                                 sys_errlist[u_error]);
1054                                 else
1055                                         tprintf("E??? (errno %ld)", u_error);
1056 #ifdef LINUX
1057                                 break;
1058                         }
1059 #endif /* LINUX */
1060                 }
1061                 else {
1062                         if (sys_res & RVAL_NONE)
1063                                 tprintf("= ?");
1064                         else {
1065                                 switch (sys_res & RVAL_MASK) {
1066                                 case RVAL_HEX:
1067                                         tprintf("= %#lx", tcp->u_rval);
1068                                         break;
1069                                 case RVAL_OCTAL:
1070                                         tprintf("= %#lo", tcp->u_rval);
1071                                         break;
1072                                 case RVAL_UDECIMAL:
1073                                         tprintf("= %lu", tcp->u_rval);
1074                                         break;
1075                                 case RVAL_DECIMAL:
1076                                         tprintf("= %ld", tcp->u_rval);
1077                                         break;
1078                                 default:
1079                                         fprintf(stderr,
1080                                                 "invalid rval format\n");
1081                                         break;
1082                                 }
1083                         }
1084                         if ((sys_res & RVAL_STR) && tcp->auxstr)
1085                                 tprintf(" (%s)", tcp->auxstr);
1086                 }
1087                 if (dtime) {
1088                         tv_sub(&tv, &tv, &tcp->etime);
1089                         tprintf(" <%ld.%06ld>",
1090                                 (long) tv.tv_sec, (long) tv.tv_usec);
1091                 }
1092                 printtrailer(tcp);
1093
1094                 dumpio(tcp);
1095                 if (fflush(tcp->outf) == EOF)
1096                         return -1;
1097                 tcp->flags &= ~TCB_INSYSCALL;
1098                 return 0;
1099         }
1100
1101         /* Entering system call */
1102         tcp->scno = scno;
1103 #ifdef LINUX
1104 #if defined(S390)
1105         {
1106                 int i;
1107                 tcp->u_nargs = sysent[tcp->scno].nargs;
1108                 for (i = 0; i < tcp->u_nargs; i++) {
1109                         if (upeek(pid,i==0 ? PT_ORIGGPR2:PT_GPR2+(i<<2), &tcp->u_arg[i]) < 0)
1110                                 return -1;
1111                 }
1112         }
1113 #elif defined (ALPHA)
1114         {
1115                 int i;
1116                 tcp->u_nargs = sysent[tcp->scno].nargs;
1117                 for (i = 0; i < tcp->u_nargs; i++) {
1118                         /* WTA: if scno is out-of-bounds this will bomb. Add range-check
1119                          * for scno somewhere above here!
1120                          */
1121                         if (upeek(pid, REG_A0+i, &tcp->u_arg[i]) < 0)
1122                                 return -1;
1123                 }
1124         }
1125 #elif defined (MIPS)
1126         {
1127                 long sp;
1128                 int i, nargs;
1129
1130                 nargs = tcp->u_nargs = sysent[tcp->scno].nargs;
1131                 if(nargs > 4) {
1132                         if(upeek(pid, REG_SP, &sp) < 0)
1133                                 return -1;
1134                         for(i = 0; i < 4; i++) {
1135                                 if (upeek(pid, REG_A0 + i, &tcp->u_arg[i])<0)
1136                                         return -1;
1137                         }
1138                         umoven(tcp, sp+16, (nargs-4) * sizeof(tcp->u_arg[0]),
1139                                (char *)(tcp->u_arg + 4));
1140                 } else {
1141                         for(i = 0; i < nargs; i++) {
1142                                 if (upeek(pid, REG_A0 + i, &tcp->u_arg[i]) < 0)
1143                                         return -1;
1144                         }
1145                 }
1146         }
1147 #elif defined (POWERPC)
1148         {
1149                 int i;
1150                 tcp->u_nargs = sysent[tcp->scno].nargs;
1151                 for (i = 0; i < tcp->u_nargs; i++) {
1152                         if (upeek(pid, (i==0) ? (4*PT_ORIG_R3) : ((i+PT_R3)*4), &tcp->u_arg[i]) < 0)
1153                                 return -1;
1154                 }
1155         }
1156 #elif defined (SPARC)
1157         {
1158                 int i;
1159
1160                 tcp->u_nargs = sysent[tcp->scno].nargs;
1161                 for (i = 0; i < tcp->u_nargs; i++)
1162                         tcp->u_arg[i] = *((&regs.r_o0) + i);
1163         }
1164 #else
1165         {
1166                 int i;
1167                 tcp->u_nargs = sysent[tcp->scno].nargs;
1168                 for (i = 0; i < tcp->u_nargs; i++) {
1169                         if (upeek(pid, i*4, &tcp->u_arg[i]) < 0)
1170                                 return -1;
1171                 }
1172         }
1173 #endif
1174 #endif /* LINUX */
1175 #ifdef SUNOS4
1176         {
1177                 int i;
1178                 tcp->u_nargs = sysent[tcp->scno].nargs;
1179                 for (i = 0; i < tcp->u_nargs; i++) {
1180                         struct user *u;
1181
1182                         if (upeek(pid, uoff(u_arg[0]) +
1183                             (i*sizeof(u->u_arg[0])), &tcp->u_arg[i]) < 0)
1184                                 return -1;
1185                 }
1186         }
1187 #endif /* SUNOS4 */
1188 #ifdef SVR4
1189 #ifdef MIPS
1190         /*
1191          * SGI is broken: even though it has pr_sysarg, it doesn't
1192          * set them on system call entry.  Get a clue.
1193          */
1194         if (sysent[tcp->scno].nargs != -1)
1195                 tcp->u_nargs = sysent[tcp->scno].nargs;
1196         else
1197                 tcp->u_nargs = tcp->status.pr_nsysarg;
1198         if (tcp->u_nargs > 4) {
1199                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1200                         4*sizeof(tcp->u_arg[0]));
1201                 umoven(tcp, tcp->status.pr_reg[CTX_SP] + 16,
1202                         (tcp->u_nargs - 4)*sizeof(tcp->u_arg[0]), (char *) (tcp->u_arg + 4));
1203         }
1204         else {
1205                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1206                         tcp->u_nargs*sizeof(tcp->u_arg[0]));
1207         }
1208 #else /* !MIPS */
1209 #ifdef HAVE_PR_SYSCALL
1210         if (sysent[tcp->scno].nargs != -1)
1211                 tcp->u_nargs = sysent[tcp->scno].nargs;
1212         else
1213                 tcp->u_nargs = tcp->status.pr_nsysarg;
1214         {
1215                 int i;
1216                 for (i = 0; i < tcp->u_nargs; i++)
1217                         tcp->u_arg[i] = tcp->status.pr_sysarg[i];
1218         }
1219 #else /* !HAVE_PR_SYSCALL */
1220 #ifdef I386
1221         if (sysent[tcp->scno].nargs != -1)
1222                 tcp->u_nargs = sysent[tcp->scno].nargs;
1223         else
1224 #if UNIXWARE >= 2
1225                 tcp->u_nargs = tcp->status.pr_lwp.pr_nsysarg;
1226 #else
1227                 tcp->u_nargs = 5;
1228 #endif
1229         umoven(tcp, tcp->status.PR_REG[UESP] + 4,
1230                 tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
1231 #endif /* I386 */
1232 #endif /* !HAVE_PR_SYSCALL */
1233 #endif /* !MIPS */
1234 #endif /* SVR4 */
1235 #ifdef __arm__
1236         switch (tcp->scno + __NR_SYSCALL_BASE) {
1237 #else
1238         switch (tcp->scno) {
1239 #endif
1240 #ifdef LINUX
1241 #if !defined (ALPHA) && !defined(SPARC) && !defined(MIPS)
1242         case SYS_socketcall:
1243                 decode_subcall(tcp, SYS_socket_subcall,
1244                         SYS_socket_nsubcalls, deref_style);
1245                 break;
1246         case SYS_ipc:
1247                 decode_subcall(tcp, SYS_ipc_subcall,
1248                         SYS_ipc_nsubcalls, shift_style);
1249                 break;
1250 #endif /* !ALPHA && !SPARC */
1251 #ifdef SPARC
1252         case SYS_socketcall:
1253                 sparc_socket_decode (tcp);
1254                 break;
1255 #endif
1256 #endif /* LINUX */
1257 #ifdef SVR4
1258 #ifdef SYS_pgrpsys_subcall
1259         case SYS_pgrpsys:
1260                 decode_subcall(tcp, SYS_pgrpsys_subcall,
1261                         SYS_pgrpsys_nsubcalls, shift_style);
1262                 break;
1263 #endif /* SYS_pgrpsys_subcall */
1264 #ifdef SYS_sigcall_subcall
1265         case SYS_sigcall:
1266                 decode_subcall(tcp, SYS_sigcall_subcall,
1267                         SYS_sigcall_nsubcalls, mask_style);
1268                 break;
1269 #endif /* SYS_sigcall_subcall */
1270         case SYS_msgsys:
1271                 decode_subcall(tcp, SYS_msgsys_subcall,
1272                         SYS_msgsys_nsubcalls, shift_style);
1273                 break;
1274         case SYS_shmsys:
1275                 decode_subcall(tcp, SYS_shmsys_subcall,
1276                         SYS_shmsys_nsubcalls, shift_style);
1277                 break;
1278         case SYS_semsys:
1279                 decode_subcall(tcp, SYS_semsys_subcall,
1280                         SYS_semsys_nsubcalls, shift_style);
1281                 break;
1282 #if 0 /* broken */
1283         case SYS_utssys:
1284                 decode_subcall(tcp, SYS_utssys_subcall,
1285                         SYS_utssys_nsubcalls, shift_style);
1286                 break;
1287 #endif
1288         case SYS_sysfs:
1289                 decode_subcall(tcp, SYS_sysfs_subcall,
1290                         SYS_sysfs_nsubcalls, shift_style);
1291                 break;
1292         case SYS_spcall:
1293                 decode_subcall(tcp, SYS_spcall_subcall,
1294                         SYS_spcall_nsubcalls, shift_style);
1295                 break;
1296 #ifdef SYS_context_subcall
1297         case SYS_context:
1298                 decode_subcall(tcp, SYS_context_subcall,
1299                         SYS_context_nsubcalls, shift_style);
1300                 break;
1301 #endif /* SYS_context_subcall */
1302 #ifdef SYS_door_subcall
1303         case SYS_door:
1304                 decode_subcall(tcp, SYS_door_subcall,
1305                         SYS_door_nsubcalls, door_style);
1306                 break;
1307 #endif /* SYS_door_subcall */
1308 #endif /* SVR4 */
1309 #ifdef SUNOS4
1310         case SYS_semsys:
1311                 decode_subcall(tcp, SYS_semsys_subcall,
1312                         SYS_semsys_nsubcalls, shift_style);
1313                 break;
1314         case SYS_msgsys:
1315                 decode_subcall(tcp, SYS_msgsys_subcall,
1316                         SYS_msgsys_nsubcalls, shift_style);
1317                 break;
1318         case SYS_shmsys:
1319                 decode_subcall(tcp, SYS_shmsys_subcall,
1320                         SYS_shmsys_nsubcalls, shift_style);
1321                 break;
1322 #endif
1323         }
1324
1325         internal_syscall(tcp);
1326         if (!(qual_flags[tcp->scno] & QUAL_TRACE)) {
1327                 tcp->flags |= TCB_INSYSCALL;
1328                 return 0;
1329         }
1330
1331         if (cflag) {
1332                 gettimeofday(&tcp->etime, NULL);
1333                 tcp->flags |= TCB_INSYSCALL;
1334                 return 0;
1335         }
1336
1337         printleader(tcp);
1338         tcp->flags &= ~TCB_REPRINT;
1339         tcp_last = tcp;
1340         if (tcp->scno >= nsyscalls)
1341                 tprintf("syscall_%lu(", tcp->scno);
1342         else
1343                 tprintf("%s(", sysent[tcp->scno].sys_name);
1344         if (tcp->scno >= nsyscalls ||
1345             ((qual_flags[tcp->scno] & QUAL_RAW) && tcp->scno != SYS_exit))
1346                 sys_res = printargs(tcp);
1347         else
1348                 sys_res = (*sysent[tcp->scno].sys_func)(tcp);
1349         if (fflush(tcp->outf) == EOF)
1350                 return -1;
1351         tcp->flags |= TCB_INSYSCALL;
1352         /* Measure the entrance time as late as possible to avoid errors. */
1353         if (dtime)
1354                 gettimeofday(&tcp->etime, NULL);
1355         return sys_res;
1356 }
1357
1358 int
1359 printargs(tcp)
1360 struct tcb *tcp;
1361 {
1362         if (entering(tcp)) {
1363                 int i;
1364
1365                 for (i = 0; i < tcp->u_nargs; i++)
1366                         tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
1367         }
1368         return 0;
1369 }
1370
1371 long
1372 getrval2(tcp)
1373 struct tcb *tcp;
1374 {
1375         long val = -1;
1376
1377 #ifdef LINUX
1378 #ifdef SPARC
1379         struct regs regs;
1380         if (ptrace(PTRACE_GETREGS,tcp->pid,(char *)&regs,0) < 0)
1381                 return -1;
1382         val = regs.r_o1;
1383 #endif /* SPARC */
1384 #endif /* LINUX */
1385
1386 #ifdef SUNOS4
1387         if (upeek(tcp->pid, uoff(u_rval2), &val) < 0)
1388                 return -1;
1389 #endif /* SUNOS4 */
1390
1391 #ifdef SVR4
1392 #ifdef SPARC
1393         val = tcp->status.PR_REG[R_O1];
1394 #endif /* SPARC */
1395 #ifdef I386
1396         val = tcp->status.PR_REG[EDX];
1397 #endif /* I386 */
1398 #ifdef MIPS
1399         val = tcp->status.PR_REG[CTX_V1];
1400 #endif /* MIPS */
1401 #endif /* SVR4 */
1402
1403         return val;
1404 }
1405
1406 /*
1407  * Apparently, indirect system calls have already be converted by ptrace(2),
1408  * so if you see "indir" this program has gone astray.
1409  */
1410 int
1411 sys_indir(tcp)
1412 struct tcb *tcp;
1413 {
1414         int i, scno, nargs;
1415
1416         if (entering(tcp)) {
1417                 if ((scno = tcp->u_arg[0]) > nsyscalls) {
1418                         fprintf(stderr, "Bogus syscall: %u\n", scno);
1419                         return 0;
1420                 }
1421                 nargs = sysent[scno].nargs;
1422                 tprintf("%s", sysent[scno].sys_name);
1423                 for (i = 0; i < nargs; i++)
1424                         tprintf(", %#lx", tcp->u_arg[i+1]);
1425         }
1426         return 0;
1427 }
1428
1429 static int
1430 time_cmp(a, b)
1431 void *a;
1432 void *b;
1433 {
1434         return -tv_cmp(&tv_count[*((int *) a)], &tv_count[*((int *) b)]);
1435 }
1436
1437 static int
1438 syscall_cmp(a, b)
1439 void *a;
1440 void *b;
1441 {
1442         return strcmp(sysent[*((int *) a)].sys_name,
1443                 sysent[*((int *) b)].sys_name);
1444 }
1445
1446 static int
1447 count_cmp(a, b)
1448 void *a;
1449 void *b;
1450 {
1451         int m = call_count[*((int *) a)], n = call_count[*((int *) b)];
1452
1453         return (m < n) ? 1 : (m > n) ? -1 : 0;
1454 }
1455
1456 static int (*sortfun)();
1457 static struct timeval overhead = { -1, -1 };
1458
1459 void
1460 set_sortby(sortby)
1461 char *sortby;
1462 {
1463         if (strcmp(sortby, "time") == 0)
1464                 sortfun = time_cmp;
1465         else if (strcmp(sortby, "calls") == 0)
1466                 sortfun = count_cmp;
1467         else if (strcmp(sortby, "name") == 0)
1468                 sortfun = syscall_cmp;
1469         else if (strcmp(sortby, "nothing") == 0)
1470                 sortfun = NULL;
1471         else {
1472                 fprintf(stderr, "invalid sortby: `%s'\n", sortby);
1473                 exit(1);
1474         }
1475 }
1476
1477 void set_overhead(n)
1478 int n;
1479 {
1480         overhead.tv_sec = n / 1000000;
1481         overhead.tv_usec = n % 1000000;
1482 }
1483
1484 void
1485 call_summary(outf)
1486 FILE *outf;
1487 {
1488         int i, j;
1489         int call_cum, error_cum;
1490         struct timeval tv_cum, dtv;
1491         double percent;
1492         char *dashes = "-------------------------";
1493         char error_str[16];
1494
1495         call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0;
1496         if (overhead.tv_sec == -1) {
1497                 tv_mul(&overhead, &shortest, 8);
1498                 tv_div(&overhead, &overhead, 10);
1499         }
1500         for (i = 0; i < nsyscalls; i++) {
1501                 sorted_count[i] = i;
1502                 if (call_count[i] == 0)
1503                         continue;
1504                 tv_mul(&dtv, &overhead, call_count[i]);
1505                 tv_sub(&tv_count[i], &tv_count[i], &dtv);
1506                 call_cum += call_count[i];
1507                 error_cum += error_count[i];
1508                 tv_add(&tv_cum, &tv_cum, &tv_count[i]);
1509         }
1510         if (sortfun)
1511                 qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun);
1512         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n",
1513                 "% time", "seconds", "usecs/call",
1514                 "calls", "errors", "syscall");
1515         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
1516                 dashes, dashes, dashes, dashes, dashes, dashes);
1517         for (i = 0; i < nsyscalls; i++) {
1518                 j = sorted_count[i];
1519                 if (call_count[j] == 0)
1520                         continue;
1521                 tv_div(&dtv, &tv_count[j], call_count[j]);
1522                 if (error_count[j])
1523                         sprintf(error_str, "%d", error_count[j]);
1524                 else
1525                         error_str[0] = '\0';
1526                 percent = 100.0*tv_float(&tv_count[j])/tv_float(&tv_cum);
1527                 fprintf(outf, "%6.2f %4ld.%06ld %11ld %9d %9.9s %s\n",
1528                         percent, (long) tv_count[j].tv_sec,
1529                         (long) tv_count[j].tv_usec,
1530                         (long) 1000000 * dtv.tv_sec + dtv.tv_usec,
1531                         call_count[j], error_str, sysent[j].sys_name);
1532         }
1533         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
1534                 dashes, dashes, dashes, dashes, dashes, dashes);
1535         if (error_cum)
1536                 sprintf(error_str, "%d", error_cum);
1537         else
1538                 error_str[0] = '\0';
1539         fprintf(outf, "%6.6s %4ld.%06ld %11.11s %9d %9.9s %s\n",
1540                 "100.00", (long) tv_cum.tv_sec, (long) tv_cum.tv_usec, "",
1541                 call_cum, error_str, "total");
1542 }