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 #if defined(LINUX) && defined(IA64)
  62 # include <asm/ptrace_offsets.h>
  63 # include <asm/rse.h>
  64 #endif
  65
  66 #ifndef SYS_ERRLIST_DECLARED
  67 extern int sys_nerr;
  68 extern char *sys_errlist[];
  69 #endif /* SYS_ERRLIST_DECLARED */
  70
  71 #define NR_SYSCALL_BASE 0
  72 #ifdef LINUX
  73 #ifndef ERESTARTSYS
  74 #define ERESTARTSYS     512
  75 #endif
  76 #ifndef ERESTARTNOINTR
  77 #define ERESTARTNOINTR  513
  78 #endif
  79 #ifndef ERESTARTNOHAND
  80 #define ERESTARTNOHAND  514     /* restart if no handler.. */
  81 #endif
  82 #ifndef ENOIOCTLCMD
  83 #define ENOIOCTLCMD     515     /* No ioctl command */
  84 #endif
  85 #ifndef NSIG
  86 #define NSIG 32
  87 #endif
  88 #ifdef ARM
  89 #undef NSIG
  90 #define NSIG 32
  91 #undef NR_SYSCALL_BASE
  92 #define NR_SYSCALL_BASE __NR_SYSCALL_BASE
  93 #endif
  94 #endif /* LINUX */
  95
  96 #include "syscall.h"
  97
  98 /* Define these shorthand notations to simplify the syscallent files. */
  99 #define TF TRACE_FILE
 100 #define TI TRACE_IPC
 101 #define TN TRACE_NETWORK
 102 #define TP TRACE_PROCESS
 103 #define TS TRACE_SIGNAL
 104
 105 struct sysent sysent0[] = {
 106 #include "syscallent.h"
 107 };
 108 int nsyscalls0 = sizeof sysent0 / sizeof sysent0[0];
 109
 110 #if SUPPORTED_PERSONALITIES >= 2
 111 struct sysent sysent1[] = {
 112 #include "syscallent1.h"
 113 };
 114 int nsyscalls1 = sizeof sysent1 / sizeof sysent1[0];
 115 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 116
 117 #if SUPPORTED_PERSONALITIES >= 3
 118 struct sysent sysent2[] = {
 119 #include "syscallent2.h"
 120 };
 121 int nsyscalls2 = sizeof sysent2 / sizeof sysent2[0];
 122 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 123
 124 struct sysent *sysent;
 125 int nsyscalls;
 126
 127 /* Now undef them since short defines cause wicked namespace pollution. */
 128 #undef TF
 129 #undef TI
 130 #undef TN
 131 #undef TP
 132 #undef TS
 133
 134 char *errnoent0[] = {
 135 #include "errnoent.h"
 136 };
 137 int nerrnos0 = sizeof errnoent0 / sizeof errnoent0[0];
 138
 139 #if SUPPORTED_PERSONALITIES >= 2
 140 char *errnoent1[] = {
 141 #include "errnoent1.h"
 142 };
 143 int nerrnos1 = sizeof errnoent1 / sizeof errnoent1[0];
 144 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 145
 146 #if SUPPORTED_PERSONALITIES >= 3
 147 char *errnoent2[] = {
 148 #include "errnoent2.h"
 149 };
 150 int nerrnos2 = sizeof errnoent2 / sizeof errnoent2[0];
 151 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 152
 153 char **errnoent;
 154 int nerrnos;
 155
 156 int current_personality;
 157
 158 int
 159 set_personality(personality)
 160 int personality;
 161 {
 162         switch (personality) {
 163         case 0:
 164                 errnoent = errnoent0;
 165                 nerrnos = nerrnos0;
 166                 sysent = sysent0;
 167                 nsyscalls = nsyscalls0;
 168                 ioctlent = ioctlent0;
 169                 nioctlents = nioctlents0;
 170                 signalent = signalent0;
 171                 nsignals = nsignals0;
 172                 break;
 173
 174 #if SUPPORTED_PERSONALITIES >= 2
 175         case 1:
 176                 errnoent = errnoent1;
 177                 nerrnos = nerrnos1;
 178                 sysent = sysent1;
 179                 nsyscalls = nsyscalls1;
 180                 ioctlent = ioctlent1;
 181                 nioctlents = nioctlents1;
 182                 signalent = signalent1;
 183                 nsignals = nsignals1;
 184                 break;
 185 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 186
 187 #if SUPPORTED_PERSONALITIES >= 3
 188         case 2:
 189                 errnoent = errnoent2;
 190                 nerrnos = nerrnos2;
 191                 sysent = sysent2;
 192                 nsyscalls = nsyscalls2;
 193                 ioctlent = ioctlent2;
 194                 nioctlents = nioctlents2;
 195                 signalent = signalent2;
 196                 nsignals = nsignals2;
 197                 break;
 198 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 199
 200         default:
 201                 return -1;
 202         }
 203
 204         current_personality = personality;
 205         return 0;
 206 }
 207
 208 int qual_flags[MAX_QUALS];
 209
 210 static int call_count[MAX_QUALS];
 211 static int error_count[MAX_QUALS];
 212 static struct timeval tv_count[MAX_QUALS];
 213 static int sorted_count[MAX_QUALS];
 214
 215 static struct timeval shortest = { 1000000, 0 };
 216
 217 static int lookup_syscall(), lookup_signal(), lookup_fault(), lookup_desc();
 218
 219 static struct qual_options {
 220         int bitflag;
 221         char *option_name;
 222         int (*lookup)();
 223         char *argument_name;
 224 } qual_options[] = {
 225         { QUAL_TRACE,   "trace",        lookup_syscall, "system call"   },
 226         { QUAL_TRACE,   "t",            lookup_syscall, "system call"   },
 227         { QUAL_ABBREV,  "abbrev",       lookup_syscall, "system call"   },
 228         { QUAL_ABBREV,  "a",            lookup_syscall, "system call"   },
 229         { QUAL_VERBOSE, "verbose",      lookup_syscall, "system call"   },
 230         { QUAL_VERBOSE, "v",            lookup_syscall, "system call"   },
 231         { QUAL_RAW,     "raw",          lookup_syscall, "system call"   },
 232         { QUAL_RAW,     "x",            lookup_syscall, "system call"   },
 233         { QUAL_SIGNAL,  "signal",       lookup_signal,  "signal"        },
 234         { QUAL_SIGNAL,  "signals",      lookup_signal,  "signal"        },
 235         { QUAL_SIGNAL,  "s",            lookup_signal,  "signal"        },
 236         { QUAL_FAULT,   "fault",        lookup_fault,   "fault"         },
 237         { QUAL_FAULT,   "faults",       lookup_fault,   "fault"         },
 238         { QUAL_FAULT,   "m",            lookup_fault,   "fault"         },
 239         { QUAL_READ,    "read",         lookup_desc,    "descriptor"    },
 240         { QUAL_READ,    "reads",        lookup_desc,    "descriptor"    },
 241         { QUAL_READ,    "r",            lookup_desc,    "descriptor"    },
 242         { QUAL_WRITE,   "write",        lookup_desc,    "descriptor"    },
 243         { QUAL_WRITE,   "writes",       lookup_desc,    "descriptor"    },
 244         { QUAL_WRITE,   "w",            lookup_desc,    "descriptor"    },
 245         { 0,            NULL,           NULL,           NULL            },
 246 };
 247
 248 static int
 249 lookup_syscall(s)
 250 char *s;
 251 {
 252         int i;
 253
 254         for (i = 0; i < nsyscalls; i++) {
 255                 if (strcmp(s, sysent[i].sys_name) == 0)
 256                         return i;
 257         }
 258         return -1;
 259 }
 260
 261 static int
 262 lookup_signal(s)
 263 char *s;
 264 {
 265         int i;
 266         char buf[32];
 267
 268         if (s && *s && isdigit(*s))
 269                 return atoi(s);
 270         strcpy(buf, s);
 271         s = buf;
 272         for (i = 0; s[i]; i++)
 273                 s[i] = toupper(s[i]);
 274         if (strncmp(s, "SIG", 3) == 0)
 275                 s += 3;
 276         for (i = 0; i <= NSIG; i++) {
 277                 if (strcmp(s, signame(i) + 3) == 0)
 278                         return i;
 279         }
 280         return -1;
 281 }
 282
 283 static int
 284 lookup_fault(s)
 285 char *s;
 286 {
 287         return -1;
 288 }
 289
 290 static int
 291 lookup_desc(s)
 292 char *s;
 293 {
 294         if (s && *s && isdigit(*s))
 295                 return atoi(s);
 296         return -1;
 297 }
 298
 299 static int
 300 lookup_class(s)
 301 char *s;
 302 {
 303         if (strcmp(s, "file") == 0)
 304                 return TRACE_FILE;
 305         if (strcmp(s, "ipc") == 0)
 306                 return TRACE_IPC;
 307         if (strcmp(s, "network") == 0)
 308                 return TRACE_NETWORK;
 309         if (strcmp(s, "process") == 0)
 310                 return TRACE_PROCESS;
 311         if (strcmp(s, "signal") == 0)
 312                 return TRACE_SIGNAL;
 313         return -1;
 314 }
 315
 316 void
 317 qualify(s)
 318 char *s;
 319 {
 320         struct qual_options *opt;
 321         int not;
 322         char *p;
 323         int i, n;
 324
 325         opt = &qual_options[0];
 326         for (i = 0; (p = qual_options[i].option_name); i++) {
 327                 n = strlen(p);
 328                 if (strncmp(s, p, n) == 0 && s[n] == '=') {
 329                         opt = &qual_options[i];
 330                         s += n + 1;
 331                         break;
 332                 }
 333         }
 334         not = 0;
 335         if (*s == '!') {
 336                 not = 1;
 337                 s++;
 338         }
 339         if (strcmp(s, "none") == 0) {
 340                 not = 1 - not;
 341                 s = "all";
 342         }
 343         if (strcmp(s, "all") == 0) {
 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                 return;
 351         }
 352         for (i = 0; i < MAX_QUALS; i++) {
 353                 if (not)
 354                         qual_flags[i] |= opt->bitflag;
 355                 else
 356                         qual_flags[i] &= ~opt->bitflag;
 357         }
 358         for (p = strtok(s, ","); p; p = strtok(NULL, ",")) {
 359                 if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
 360                         for (i = 0; i < MAX_QUALS; i++) {
 361                                 if (sysent[i].sys_flags & n) {
 362                                         if (not)
 363                                                 qual_flags[i] &= ~opt->bitflag;
 364                                         else
 365                                                 qual_flags[i] |= opt->bitflag;
 366                                 }
 367                         }
 368                         continue;
 369                 }
 370                 if ((n = (*opt->lookup)(p)) < 0) {
 371                         fprintf(stderr, "strace: invalid %s `%s'\n",
 372                                 opt->argument_name, p);
 373                         exit(1);
 374                 }
 375                 if (not)
 376                         qual_flags[n] &= ~opt->bitflag;
 377                 else
 378                         qual_flags[n] |= opt->bitflag;
 379         }
 380         return;
 381 }
 382
 383 static void
 384 dumpio(tcp)
 385 struct tcb *tcp;
 386 {
 387         if (syserror(tcp))
 388                 return;
 389         if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= MAX_QUALS)
 390                 return;
 391         switch (tcp->scno + NR_SYSCALL_BASE) {
 392         case SYS_read:
 393 #ifdef SYS_recv
 394         case SYS_recv:
 395 #endif
 396 #ifdef SYS_recvfrom
 397         case SYS_recvfrom:
 398 #endif
 399                 if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
 400                         dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
 401                 break;
 402         case SYS_write:
 403 #ifdef SYS_send
 404         case SYS_send:
 405 #endif
 406 #ifdef SYS_sendto
 407         case SYS_sendto:
 408 #endif
 409                 if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
 410                         dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 411                 break;
 412         }
 413 }
 414
 415 enum subcall_style { shift_style, deref_style, mask_style, door_style };
 416
 417 #if !(defined(LINUX) && ( defined(ALPHA) || defined(IA64) || defined(MIPS) ))
 418
 419 const int socket_map [] = {
 420                /* SYS_SOCKET      */ 97,
 421                /* SYS_BIND        */ 104,
 422                /* SYS_CONNECT     */ 98,
 423                /* SYS_LISTEN      */ 106,
 424                /* SYS_ACCEPT      */ 99,
 425                /* SYS_GETSOCKNAME */ 150,
 426                /* SYS_GETPEERNAME */ 141,
 427                /* SYS_SOCKETPAIR  */ 135,
 428                /* SYS_SEND        */ 101,
 429                /* SYS_RECV        */ 102,
 430                /* SYS_SENDTO      */ 133,
 431                /* SYS_RECVFROM    */ 125,
 432                /* SYS_SHUTDOWN    */ 134,
 433                /* SYS_SETSOCKOPT  */ 105,
 434                /* SYS_GETSOCKOPT  */ 118,
 435                /* SYS_SENDMSG     */ 114,
 436                /* SYS_RECVMSG     */ 113
 437 };
 438
 439 void
 440 sparc_socket_decode (tcp)
 441 struct tcb *tcp;
 442 {
 443         volatile long addr;
 444         volatile int i, n;
 445
 446         if (tcp->u_arg [0] < 1 || tcp->u_arg [0] > sizeof(socket_map)/sizeof(int)+1){
 447                 return;
 448         }
 449         tcp->scno = socket_map [tcp->u_arg [0]-1];
 450         n = tcp->u_nargs = sysent [tcp->scno].nargs;
 451         addr = tcp->u_arg [1];
 452         for (i = 0; i < n; i++){
 453                 int arg;
 454                 if (umoven (tcp, addr, sizeof (arg), (void *) &arg) < 0)
 455                         arg = 0;
 456                 tcp->u_arg [i] = arg;
 457                 addr += sizeof (arg);
 458         }
 459 }
 460
 461 static void
 462 decode_subcall(tcp, subcall, nsubcalls, style)
 463 struct tcb *tcp;
 464 int subcall;
 465 int nsubcalls;
 466 enum subcall_style style;
 467 {
 468         int i, addr, mask, arg;
 469
 470         if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
 471                 return;
 472         switch (style) {
 473         case shift_style:
 474                 tcp->scno = subcall + tcp->u_arg[0];
 475                 if (sysent[tcp->scno].nargs != -1)
 476                         tcp->u_nargs = sysent[tcp->scno].nargs;
 477                 else
 478                         tcp->u_nargs--;
 479                 for (i = 0; i < tcp->u_nargs; i++)
 480                         tcp->u_arg[i] = tcp->u_arg[i + 1];
 481                 break;
 482         case deref_style:
 483                 tcp->scno = subcall + tcp->u_arg[0];
 484                 addr = tcp->u_arg[1];
 485                 for (i = 0; i < sysent[tcp->scno].nargs; i++) {
 486                         if (umove(tcp, addr, &arg) < 0)
 487                                 arg = 0;
 488                         tcp->u_arg[i] = arg;
 489                         addr += sizeof(arg);
 490                 }
 491                 tcp->u_nargs = sysent[tcp->scno].nargs;
 492                 break;
 493         case mask_style:
 494                 mask = (tcp->u_arg[0] >> 8) & 0xff;
 495                 tcp->u_arg[0] &= 0xff;
 496                 for (i = 0; mask; i++)
 497                         mask >>= 1;
 498                 tcp->scno = subcall + i;
 499                 if (sysent[tcp->scno].nargs != -1)
 500                         tcp->u_nargs = sysent[tcp->scno].nargs;
 501                 break;
 502         case door_style:
 503                 /*
 504                  * Oh, yuck.  The call code is the *sixth* argument.
 505                  */
 506                 tcp->scno = subcall + tcp->u_arg[5];
 507                 if (sysent[tcp->scno].nargs != -1)
 508                         tcp->u_nargs = sysent[tcp->scno].nargs;
 509                 else
 510                         tcp->u_nargs--;
 511                 break;
 512         }
 513 }
 514 #endif
 515
 516 struct tcb *tcp_last = NULL;
 517
 518 static int
 519 internal_syscall(tcp)
 520 struct tcb *tcp;
 521 {
 522         /*
 523          * We must always trace a few critical system calls in order to
 524          * correctly support following forks in the presence of tracing
 525          * qualifiers.
 526          */
 527         switch (tcp->scno + NR_SYSCALL_BASE) {
 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 get_scno(tcp)
 576 struct tcb *tcp;
 577 {
 578         long scno = 0;
 579         int pid = tcp->pid;
 580
 581 #ifdef LINUX
 582 #if defined(S390)
 583         if (upeek(tcp->pid,PT_PSWADDR,&pc) < 0)
 584                 return -1;
 585         scno = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)(pc-4),0);
 586         if (errno)
 587                 return -1;
 588         scno&=0xFF;
 589 #elif defined (POWERPC)
 590         if (upeek(pid, 4*PT_R0, &scno) < 0)
 591                 return -1;
 592         if (!(tcp->flags & TCB_INSYSCALL)) {
 593                 /* Check if we return from execve. */
 594                 if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) {
 595                         tcp->flags &= ~TCB_WAITEXECVE;
 596                         return 0;
 597                 }
 598         }
 599 #elif defined (I386)
 600         if (upeek(pid, 4*ORIG_EAX, &scno) < 0)
 601                 return -1;
 602 #elif defined(IA64)
 603 #define IA64_PSR_IS     ((long)1 << 34)
 604         if (upeek (pid, PT_CR_IPSR, &psr) >= 0)
 605                 ia32 = (psr & IA64_PSR_IS);
 606         if (!(tcp->flags & TCB_INSYSCALL)) {
 607                 if (ia32) {
 608                         if (upeek(pid, PT_R8, &scno) < 0)
 609                                 return -1;
 610                 } else {
 611                         if (upeek (pid, PT_R15, &scno) < 0)
 612                                 return -1;
 613                 }
 614         } else {
 615                 /* syscall in progress */
 616                 if (upeek (pid, PT_R8, &r8) < 0)
 617                         return -1;
 618                 if (upeek (pid, PT_R10, &r10) < 0)
 619                         return -1;
 620         }
 621 #elif defined (ARM)
 622         {
 623             long pc;
 624             upeek(pid, 4*15, &pc);
 625             umoven(tcp, pc-4, 4, (char *)&scno);
 626             scno &= 0x000fffff;
 627         }
 628 #elif defined (M68K)
 629         if (upeek(pid, 4*PT_ORIG_D0, &scno) < 0)
 630                 return -1;
 631 #elif defined (MIPS)
 632         if (upeek(pid, REG_A3, &a3) < 0)
 633                 return -1;
 634
 635         if(!(tcp->flags & TCB_INSYSCALL)) {
 636                 if (upeek(pid, REG_V0, &scno) < 0)
 637                         return -1;
 638
 639                 if (scno < 0 || scno > nsyscalls) {
 640                         if(a3 == 0 || a3 == -1) {
 641                                 if(debug)
 642                                         fprintf (stderr, "stray syscall exit: v0 = %ld\n", scno);
 643                                 return 0;
 644                         }
 645                 }
 646         } else {
 647                 if (upeek(pid, REG_V0, &r2) < 0)
 648                         return -1;
 649         }
 650 #elif defined (ALPHA)
 651         if (upeek(pid, REG_A3, &a3) < 0)
 652                 return -1;
 653
 654         if (!(tcp->flags & TCB_INSYSCALL)) {
 655                 if (upeek(pid, REG_R0, &scno) < 0)
 656                         return -1;
 657
 658                 /* Check if we return from execve. */
 659                 if (scno == 0 && tcp->flags & TCB_WAITEXECVE) {
 660                         tcp->flags &= ~TCB_WAITEXECVE;
 661                         return 0;
 662                 }
 663
 664                 /*
 665                  * Do some sanity checks to figure out if it's
 666                  * really a syscall entry
 667                  */
 668                 if (scno < 0 || scno > nsyscalls) {
 669                         if (a3 == 0 || a3 == -1) {
 670                                 if (debug)
 671                                         fprintf (stderr, "stray syscall exit: r0 = %ld\n", scno);
 672                                 return 0;
 673                         }
 674                 }
 675         }
 676         else {
 677                 if (upeek(pid, REG_R0, &r0) < 0)
 678                         return -1;
 679         }
 680 #elif defined (SPARC)
 681         /* Everything we need is in the current register set. */
 682         if (ptrace(PTRACE_GETREGS,pid,(char *)&regs,0) < 0)
 683                 return -1;
 684
 685         /* If we are entering, then disassemble the syscall trap. */
 686         if (!(tcp->flags & TCB_INSYSCALL)) {
 687                 /* Retrieve the syscall trap instruction. */
 688                 errno = 0;
 689                 trap = ptrace(PTRACE_PEEKTEXT,pid,(char *)regs.r_pc,0);
 690                 if (errno)
 691                         return -1;
 692
 693                 /* Disassemble the trap to see what personality to use. */
 694                 switch (trap) {
 695                 case 0x91d02010:
 696                         /* Linux/SPARC syscall trap. */
 697                         set_personality(0);
 698                         break;
 699                 case 0x91d0206d:
 700                         /* Linux/SPARC64 syscall trap. */
 701                         fprintf(stderr,"syscall: Linux/SPARC64 not supported yet\n");
 702                         return -1;
 703                 case 0x91d02000:
 704                         /* SunOS syscall trap. (pers 1) */
 705                         fprintf(stderr,"syscall: SunOS no support\n");
 706                         return -1;
 707                 case 0x91d02008:
 708                         /* Solaris 2.x syscall trap. (per 2) */
 709                         set_personality(1);
 710                         break;
 711                 case 0x91d02009:
 712                         /* NetBSD/FreeBSD syscall trap. */
 713                         fprintf(stderr,"syscall: NetBSD/FreeBSD not supported\n");
 714                         return -1;
 715                 case 0x91d02027:
 716                         /* Solaris 2.x gettimeofday */
 717                         set_personality(1);
 718                         break;
 719                 default:
 720                         /* Unknown syscall trap. */
 721                         if(tcp->flags & TCB_WAITEXECVE) {
 722                                 tcp->flags &= ~TCB_WAITEXECVE;
 723                                 return 0;
 724                         }
 725                         fprintf(stderr,"syscall: unknown syscall trap %08x %08x\n", trap, regs.r_pc);
 726                         return -1;
 727                 }
 728
 729                 /* Extract the system call number from the registers. */
 730                 if (trap == 0x91d02027)
 731                         scno = 156;
 732                 else
 733                         scno = regs.r_g1;
 734                 if (scno == 0) {
 735                         scno = regs.r_o0;
 736                         memmove (&regs.r_o0, &regs.r_o1, 7*sizeof(regs.r_o0));
 737                 }
 738         }
 739 #endif
 740 #endif /* LINUX */
 741 #ifdef SUNOS4
 742         if (upeek(pid, uoff(u_arg[7]), &scno) < 0)
 743                 return -1;
 744 #endif
 745 #ifdef SVR4
 746 #ifdef HAVE_PR_SYSCALL
 747         scno = tcp->status.pr_syscall;
 748 #else /* !HAVE_PR_SYSCALL */
 749         scno = tcp->status.PR_WHAT;
 750 #endif /* !HAVE_PR_SYSCALL */
 751 #endif
 752         tcp->scno = scno;
 753         return 1;
 754 }
 755
 756 #ifdef LINUX
 757 #if defined (I386)
 758         static long eax;
 759 #elif defined (IA64)
 760         long r8, r10, psr;
 761         long ia32 = 0;
 762 #elif defined (POWERPC)
 763         static long result,flags;
 764 #elif defined (M68K)
 765         static int d0;
 766 #elif defined (ARM)
 767         static int r0;
 768 #elif defined (ALPHA)
 769         static long r0;
 770         static long a3;
 771 #elif defined (SPARC)
 772         static struct pt_regs regs;
 773         static unsigned long trap;
 774 #elif defined(S390)
 775         static long gpr2;
 776         static long pc;
 777 #endif
 778 #endif /* LINUX */
 779
 780 int
 781 syscall_fixup(tcp)
 782 struct tcb *tcp;
 783 {
 784         int pid = tcp->pid;
 785
 786 #ifdef SVR4
 787         if (!(tcp->flags & TCB_INSYSCALL)) {
 788                 if (tcp->status.PR_WHY != PR_SYSENTRY) {
 789                         if (
 790                             scno == SYS_fork
 791 #ifdef SYS_vfork
 792                             || scno == SYS_vfork
 793 #endif /* SYS_vfork */
 794                             ) {
 795                                 /* We are returning in the child, fake it. */
 796                                 tcp->status.PR_WHY = PR_SYSENTRY;
 797                                 trace_syscall(tcp);
 798                                 tcp->status.PR_WHY = PR_SYSEXIT;
 799                         }
 800                         else {
 801                                 fprintf(stderr, "syscall: missing entry\n");
 802                                 tcp->flags |= TCB_INSYSCALL;
 803                         }
 804                 }
 805         }
 806         else {
 807                 if (tcp->status.PR_WHY != PR_SYSEXIT) {
 808                         fprintf(stderr, "syscall: missing exit\n");
 809                         tcp->flags &= ~TCB_INSYSCALL;
 810                 }
 811         }
 812 #endif /* SVR4 */
 813 #ifdef SUNOS4
 814         if (!(tcp->flags & TCB_INSYSCALL)) {
 815                 if (scno == 0) {
 816                         fprintf(stderr, "syscall: missing entry\n");
 817                         tcp->flags |= TCB_INSYSCALL;
 818                 }
 819         }
 820         else {
 821                 if (scno != 0) {
 822                         if (debug) {
 823                                 /*
 824                                  * This happens when a signal handler
 825                                  * for a signal which interrupted a
 826                                  * a system call makes another system call.
 827                                  */
 828                                 fprintf(stderr, "syscall: missing exit\n");
 829                         }
 830                         tcp->flags &= ~TCB_INSYSCALL;
 831                 }
 832         }
 833 #endif /* SUNOS4 */
 834 #ifdef LINUX
 835 #if defined (I386)
 836         if (upeek(pid, 4*EAX, &eax) < 0)
 837                 return -1;
 838         if (eax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 839                 if (debug)
 840                         fprintf(stderr, "stray syscall exit: eax = %ld\n", eax);
 841                 return 0;
 842         }
 843 #elif defined (POWERPC)
 844 # define SO_MASK 0x10000000
 845         if (upeek(pid, 4*PT_CCR, &flags) < 0)
 846                 return -1;
 847         if (upeek(pid, 4*PT_R3, &result) < 0)
 848                 return -1;
 849         if (flags & SO_MASK)
 850                 result = -result;
 851 #elif defined (M68K)
 852         if (upeek(pid, 4*PT_D0, &d0) < 0)
 853                 return -1;
 854         if (d0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 855                 if (debug)
 856                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", d0);
 857                 return 0;
 858         }
 859 #elif defined (ARM)
 860         if (upeek(pid, 4*0, (long *)&r0) < 0)
 861                 return -1;
 862         if ( 0 && r0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 863                 if (debug)
 864                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", r0);
 865                 return 0;
 866         }
 867 #else
 868 #endif
 869 #endif /* LINUX */
 870         return 1;
 871 }
 872
 873 int
 874 get_error(tcp)
 875 struct tcb *tcp;
 876 {
 877         int u_error = 0;
 878 #ifdef LINUX
 879 #ifdef I386
 880                 if (eax < 0 && -eax < nerrnos) {
 881                         tcp->u_rval = -1;
 882                         u_error = -eax;
 883                 }
 884                 else {
 885                         tcp->u_rval = eax;
 886                         u_error = 0;
 887                 }
 888 #else /* !I386 */
 889 #ifdef IA64
 890                 if (ia32) {
 891                         int err;
 892
 893                         err = (int)r8;
 894                         if (err < 0 && -err < nerrnos) {
 895                                 tcp->u_rval = -1;
 896                                 u_error = -err;
 897                         }
 898                         else {
 899                                 tcp->u_rval = err;
 900                                 u_error = 0;
 901                         }
 902                 } else {
 903                         if (r10) {
 904                                 tcp->u_rval = -1;
 905                                 u_error = r8;
 906                         } else {
 907                                 tcp->u_rval = r8;
 908                                 u_error = 0;
 909                         }
 910                 }
 911 #else /* !IA64 */
 912 #ifdef MIPS
 913                 if (a3) {
 914                         tcp->u_rval = -1;
 915                         u_error = r2;
 916                 } else {
 917                         tcp->u_rval = r2;
 918                         u_error = 0;
 919                 }
 920 #else
 921 #ifdef POWERPC
 922                 if (result && (unsigned) -result < nerrnos) {
 923                         tcp->u_rval = -1;
 924                         u_error = -result;
 925                 }
 926                 else {
 927                         tcp->u_rval = result;
 928                         u_error = 0;
 929                 }
 930 #else /* !POWERPC */
 931 #ifdef M68K
 932                 if (d0 && (unsigned) -d0 < nerrnos) {
 933                         tcp->u_rval = -1;
 934                         u_error = -d0;
 935                 }
 936                 else {
 937                         tcp->u_rval = d0;
 938                         u_error = 0;
 939                 }
 940 #else /* !M68K */
 941 #ifdef ARM
 942                 if (r0 && (unsigned) -r0 < nerrnos) {
 943                         tcp->u_rval = -1;
 944                         u_error = -r0;
 945                 }
 946                 else {
 947                         tcp->u_rval = r0;
 948                         u_error = 0;
 949                 }
 950 #else /* !ARM */
 951 #ifdef ALPHA
 952                 if (a3) {
 953                         tcp->u_rval = -1;
 954                         u_error = r0;
 955                 }
 956                 else {
 957                         tcp->u_rval = r0;
 958                         u_error = 0;
 959                 }
 960 #else /* !ALPHA */
 961 #ifdef SPARC
 962                 if (regs.r_psr & PSR_C) {
 963                         tcp->u_rval = -1;
 964                         u_error = regs.r_o0;
 965                 }
 966                 else {
 967                         tcp->u_rval = regs.r_o0;
 968                         u_error = 0;
 969                 }
 970 #endif /* SPARC */
 971 #endif /* ALPHA */
 972 #endif /* ARM */
 973 #endif /* M68K */
 974 #endif /* POWERPC */
 975 #endif /* MIPS */
 976 #endif /* IA64 */
 977 #endif /* I386 */
 978 #endif /* LINUX */
 979 #ifdef SUNOS4
 980                 /* get error code from user struct */
 981                 if (upeek(pid, uoff(u_error), &u_error) < 0)
 982                         return -1;
 983                 u_error >>= 24; /* u_error is a char */
 984
 985                 /* get system call return value */
 986                 if (upeek(pid, uoff(u_rval1), &tcp->u_rval) < 0)
 987                         return -1;
 988 #endif /* SUNOS4 */
 989 #ifdef SVR4
 990 #ifdef SPARC
 991                 /* Judicious guessing goes a long way. */
 992                 if (tcp->status.pr_reg[R_PSR] & 0x100000) {
 993                         tcp->u_rval = -1;
 994                         u_error = tcp->status.pr_reg[R_O0];
 995                 }
 996                 else {
 997                         tcp->u_rval = tcp->status.pr_reg[R_O0];
 998                         u_error = 0;
 999                 }
1000 #endif /* SPARC */
1001 #ifdef I386
1002                 /* Wanna know how to kill an hour single-stepping? */
1003                 if (tcp->status.PR_REG[EFL] & 0x1) {
1004                         tcp->u_rval = -1;
1005                         u_error = tcp->status.PR_REG[EAX];
1006                 }
1007                 else {
1008                         tcp->u_rval = tcp->status.PR_REG[EAX];
1009                         u_error = 0;
1010                 }
1011 #endif /* I386 */
1012 #ifdef MIPS
1013                 if (tcp->status.pr_reg[CTX_A3]) {
1014                         tcp->u_rval = -1;
1015                         u_error = tcp->status.pr_reg[CTX_V0];
1016                 }
1017                 else {
1018                         tcp->u_rval = tcp->status.pr_reg[CTX_V0];
1019                         u_error = 0;
1020                 }
1021 #endif /* MIPS */
1022 #endif /* SVR4 */
1023         tcp->u_error = u_error;
1024         return 1;
1025 }
1026
1027 int syscall_enter(tcp)
1028 struct tcb *tcp;
1029 {
1030         int pid = tcp->pid;
1031 #ifdef LINUX
1032 #if defined(S390)
1033         {
1034                 int i;
1035                 tcp->u_nargs = sysent[tcp->scno].nargs;
1036                 for (i = 0; i < tcp->u_nargs; i++) {
1037                         if (upeek(pid,i==0 ? PT_ORIGGPR2:PT_GPR2+(i<<2), &tcp->u_arg[i]) < 0)
1038                                 return -1;
1039                 }
1040         }
1041 #elif defined (ALPHA)
1042         {
1043                 int i;
1044                 tcp->u_nargs = sysent[tcp->scno].nargs;
1045                 for (i = 0; i < tcp->u_nargs; i++) {
1046                         /* WTA: if scno is out-of-bounds this will bomb. Add range-check
1047                          * for scno somewhere above here!
1048                          */
1049                         if (upeek(pid, REG_A0+i, &tcp->u_arg[i]) < 0)
1050                                 return -1;
1051                 }
1052         }
1053 #elif defined (IA64)
1054         {
1055                 unsigned long *bsp, i;
1056
1057                 if (upeek(pid, PT_AR_BSP, (long *) &bsp) < 0)
1058                         return -1;
1059
1060                 tcp->u_nargs = sysent[tcp->scno].nargs;
1061                 for (i = 0; i < tcp->u_nargs; ++i) {
1062                         if (umoven(tcp, (unsigned long) ia64_rse_skip_regs(bsp, i), sizeof(long),
1063                                    (char *) &tcp->u_arg[i])
1064                             < 0)
1065                                 return -1;
1066                 }
1067         }
1068 #elif defined (MIPS)
1069         {
1070                 long sp;
1071                 int i, nargs;
1072
1073                 nargs = tcp->u_nargs = sysent[tcp->scno].nargs;
1074                 if(nargs > 4) {
1075                         if(upeek(pid, REG_SP, &sp) < 0)
1076                                 return -1;
1077                         for(i = 0; i < 4; i++) {
1078                                 if (upeek(pid, REG_A0 + i, &tcp->u_arg[i])<0)
1079                                         return -1;
1080                         }
1081                         umoven(tcp, sp+16, (nargs-4) * sizeof(tcp->u_arg[0]),
1082                                (char *)(tcp->u_arg + 4));
1083                 } else {
1084                         for(i = 0; i < nargs; i++) {
1085                                 if (upeek(pid, REG_A0 + i, &tcp->u_arg[i]) < 0)
1086                                         return -1;
1087                         }
1088                 }
1089         }
1090 #elif defined (POWERPC)
1091         {
1092                 int i;
1093                 tcp->u_nargs = sysent[tcp->scno].nargs;
1094                 for (i = 0; i < tcp->u_nargs; i++) {
1095                         if (upeek(pid, (i==0) ? (4*PT_ORIG_R3) : ((i+PT_R3)*4), &tcp->u_arg[i]) < 0)
1096                                 return -1;
1097                 }
1098         }
1099 #elif defined (SPARC)
1100         {
1101                 int i;
1102
1103                 tcp->u_nargs = sysent[tcp->scno].nargs;
1104                 for (i = 0; i < tcp->u_nargs; i++)
1105                         tcp->u_arg[i] = *((&regs.r_o0) + i);
1106         }
1107 #else
1108         {
1109                 int i;
1110                 tcp->u_nargs = sysent[tcp->scno].nargs;
1111                 for (i = 0; i < tcp->u_nargs; i++) {
1112                         if (upeek(pid, i*4, &tcp->u_arg[i]) < 0)
1113                                 return -1;
1114                 }
1115         }
1116 #endif
1117 #endif /* LINUX */
1118 #ifdef SUNOS4
1119         {
1120                 int i;
1121                 tcp->u_nargs = sysent[tcp->scno].nargs;
1122                 for (i = 0; i < tcp->u_nargs; i++) {
1123                         struct user *u;
1124
1125                         if (upeek(pid, uoff(u_arg[0]) +
1126                             (i*sizeof(u->u_arg[0])), &tcp->u_arg[i]) < 0)
1127                                 return -1;
1128                 }
1129         }
1130 #endif /* SUNOS4 */
1131 #ifdef SVR4
1132 #ifdef MIPS
1133         /*
1134          * SGI is broken: even though it has pr_sysarg, it doesn't
1135          * set them on system call entry.  Get a clue.
1136          */
1137         if (sysent[tcp->scno].nargs != -1)
1138                 tcp->u_nargs = sysent[tcp->scno].nargs;
1139         else
1140                 tcp->u_nargs = tcp->status.pr_nsysarg;
1141         if (tcp->u_nargs > 4) {
1142                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1143                         4*sizeof(tcp->u_arg[0]));
1144                 umoven(tcp, tcp->status.pr_reg[CTX_SP] + 16,
1145                         (tcp->u_nargs - 4)*sizeof(tcp->u_arg[0]), (char *) (tcp->u_arg + 4));
1146         }
1147         else {
1148                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1149                         tcp->u_nargs*sizeof(tcp->u_arg[0]));
1150         }
1151 #else /* !MIPS */
1152 #ifdef HAVE_PR_SYSCALL
1153         if (sysent[tcp->scno].nargs != -1)
1154                 tcp->u_nargs = sysent[tcp->scno].nargs;
1155         else
1156                 tcp->u_nargs = tcp->status.pr_nsysarg;
1157         {
1158                 int i;
1159                 for (i = 0; i < tcp->u_nargs; i++)
1160                         tcp->u_arg[i] = tcp->status.pr_sysarg[i];
1161         }
1162 #else /* !HAVE_PR_SYSCALL */
1163 #ifdef I386
1164         if (sysent[tcp->scno].nargs != -1)
1165                 tcp->u_nargs = sysent[tcp->scno].nargs;
1166         else
1167 #if UNIXWARE >= 2
1168                 tcp->u_nargs = tcp->status.pr_lwp.pr_nsysarg;
1169 #else
1170                 tcp->u_nargs = 5;
1171 #endif
1172         umoven(tcp, tcp->status.PR_REG[UESP] + 4,
1173                 tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
1174 #endif /* I386 */
1175 #endif /* !HAVE_PR_SYSCALL */
1176 #endif /* !MIPS */
1177 #endif /* SVR4 */
1178         return 1;
1179 }
1180
1181 int
1182 trace_syscall(tcp)
1183 struct tcb *tcp;
1184 {
1185         int sys_res;
1186         struct timeval tv;
1187         int res;
1188
1189         /* Measure the exit time as early as possible to avoid errors. */
1190         if (dtime && (tcp->flags & TCB_INSYSCALL))
1191                 gettimeofday(&tv, NULL);
1192
1193         res = get_scno(tcp);
1194         if (res != 1)
1195                 return res;
1196
1197         res = syscall_fixup(tcp);
1198         if (res != 1)
1199                 return res;
1200
1201         if (tcp->flags & TCB_INSYSCALL) {
1202                 long u_error;
1203                 res = get_error(tcp);
1204                 if (res != 1)
1205                         return res;
1206                 u_error = tcp->u_error;
1207
1208
1209                 internal_syscall(tcp);
1210                 if (!(qual_flags[tcp->scno] & QUAL_TRACE)) {
1211                         tcp->flags &= ~TCB_INSYSCALL;
1212                         return 0;
1213                 }
1214
1215                 if (tcp->flags & TCB_REPRINT) {
1216                         printleader(tcp);
1217                         tprintf("<... ");
1218                         if (tcp->scno >= nsyscalls)
1219                                 tprintf("syscall_%lu", tcp->scno);
1220                         else
1221                                 tprintf("%s", sysent[tcp->scno].sys_name);
1222                         tprintf(" resumed> ");
1223                 }
1224
1225                 if (cflag) {
1226                         call_count[tcp->scno]++;
1227                         if (tcp->u_error)
1228                                 error_count[tcp->scno]++;
1229                         tv_sub(&tv, &tv, &tcp->etime);
1230 #ifdef LINUX
1231                         if (tv_cmp(&tv, &tcp->dtime) > 0) {
1232                                 static struct timeval one_tick =
1233                                         { 0, 1000000 / HZ };
1234
1235                                 if (tv_nz(&tcp->dtime))
1236                                         tv = tcp->dtime;
1237                                 else if (tv_cmp(&tv, &one_tick) > 0) {
1238                                         if (tv_cmp(&shortest, &one_tick) < 0)
1239                                                 tv = shortest;
1240                                         else
1241                                                 tv = one_tick;
1242                                 }
1243                         }
1244 #endif /* LINUX */
1245                         if (tv_cmp(&tv, &shortest) < 0)
1246                                 shortest = tv;
1247                         tv_add(&tv_count[tcp->scno],
1248                                 &tv_count[tcp->scno], &tv);
1249                         tcp->flags &= ~TCB_INSYSCALL;
1250                         return 0;
1251                 }
1252
1253                 if (tcp->scno >= nsyscalls
1254                     || (qual_flags[tcp->scno] & QUAL_RAW))
1255                         sys_res = printargs(tcp);
1256                 else
1257                         sys_res = (*sysent[tcp->scno].sys_func)(tcp);
1258                 u_error = tcp->u_error;
1259                 tprintf(") ");
1260                 tabto(acolumn);
1261                 if (qual_flags[tcp->scno] & QUAL_RAW) {
1262                         if (u_error)
1263                                 tprintf("= -1 (errno %ld)", u_error);
1264                         else
1265                                 tprintf("= %#lx", tcp->u_rval);
1266                 }
1267                 else if (!(sys_res & RVAL_NONE) && u_error) {
1268                         switch (u_error) {
1269 #ifdef LINUX
1270                         case ERESTARTSYS:
1271                                 tprintf("= ? ERESTARTSYS (To be restarted)");
1272                                 break;
1273                         case ERESTARTNOINTR:
1274                                 tprintf("= ? ERESTARTNOINTR (To be restarted)");
1275                                 break;
1276                         case ERESTARTNOHAND:
1277                                 tprintf("= ? ERESTARTNOHAND (To be restarted)");
1278                                 break;
1279 #endif /* LINUX */
1280                         default:
1281                                 tprintf("= -1 ");
1282                                 if (u_error < nerrnos && u_error < sys_nerr)
1283                                         tprintf("%s (%s)", errnoent[u_error],
1284                                                 sys_errlist[u_error]);
1285                                 else if (u_error < nerrnos)
1286                                         tprintf("%s (errno %ld)",
1287                                                 errnoent[u_error], u_error);
1288                                 else if (u_error < sys_nerr)
1289                                         tprintf("ERRNO_%ld (%s)", u_error,
1290                                                 sys_errlist[u_error]);
1291                                 else
1292                                         tprintf("E??? (errno %ld)", u_error);
1293                                 break;
1294                         }
1295                 }
1296                 else {
1297                         if (sys_res & RVAL_NONE)
1298                                 tprintf("= ?");
1299                         else {
1300                                 switch (sys_res & RVAL_MASK) {
1301                                 case RVAL_HEX:
1302                                         tprintf("= %#lx", tcp->u_rval);
1303                                         break;
1304                                 case RVAL_OCTAL:
1305                                         tprintf("= %#lo", tcp->u_rval);
1306                                         break;
1307                                 case RVAL_UDECIMAL:
1308                                         tprintf("= %lu", tcp->u_rval);
1309                                         break;
1310                                 case RVAL_DECIMAL:
1311                                         tprintf("= %ld", tcp->u_rval);
1312                                         break;
1313                                 default:
1314                                         fprintf(stderr,
1315                                                 "invalid rval format\n");
1316                                         break;
1317                                 }
1318                         }
1319                         if ((sys_res & RVAL_STR) && tcp->auxstr)
1320                                 tprintf(" (%s)", tcp->auxstr);
1321                 }
1322                 if (dtime) {
1323                         tv_sub(&tv, &tv, &tcp->etime);
1324                         tprintf(" <%ld.%06ld>",
1325                                 (long) tv.tv_sec, (long) tv.tv_usec);
1326                 }
1327                 printtrailer(tcp);
1328
1329                 dumpio(tcp);
1330                 if (fflush(tcp->outf) == EOF)
1331                         return -1;
1332                 tcp->flags &= ~TCB_INSYSCALL;
1333                 return 0;
1334         }
1335
1336         /* Entering system call */
1337         res = syscall_enter(tcp);
1338         if (res != 1)
1339                 return res;
1340
1341         switch (tcp->scno + NR_SYSCALL_BASE) {
1342 #ifdef LINUX
1343 #if !defined (ALPHA) && !defined(IA64) && !defined(SPARC) && !defined(MIPS)
1344         case SYS_socketcall:
1345                 decode_subcall(tcp, SYS_socket_subcall,
1346                         SYS_socket_nsubcalls, deref_style);
1347                 break;
1348         case SYS_ipc:
1349                 decode_subcall(tcp, SYS_ipc_subcall,
1350                         SYS_ipc_nsubcalls, shift_style);
1351                 break;
1352 #endif /* !ALPHA && !SPARC */
1353 #ifdef SPARC
1354         case SYS_socketcall:
1355                 sparc_socket_decode (tcp);
1356                 break;
1357 #endif
1358 #endif /* LINUX */
1359 #ifdef SVR4
1360 #ifdef SYS_pgrpsys_subcall
1361         case SYS_pgrpsys:
1362                 decode_subcall(tcp, SYS_pgrpsys_subcall,
1363                         SYS_pgrpsys_nsubcalls, shift_style);
1364                 break;
1365 #endif /* SYS_pgrpsys_subcall */
1366 #ifdef SYS_sigcall_subcall
1367         case SYS_sigcall:
1368                 decode_subcall(tcp, SYS_sigcall_subcall,
1369                         SYS_sigcall_nsubcalls, mask_style);
1370                 break;
1371 #endif /* SYS_sigcall_subcall */
1372         case SYS_msgsys:
1373                 decode_subcall(tcp, SYS_msgsys_subcall,
1374                         SYS_msgsys_nsubcalls, shift_style);
1375                 break;
1376         case SYS_shmsys:
1377                 decode_subcall(tcp, SYS_shmsys_subcall,
1378                         SYS_shmsys_nsubcalls, shift_style);
1379                 break;
1380         case SYS_semsys:
1381                 decode_subcall(tcp, SYS_semsys_subcall,
1382                         SYS_semsys_nsubcalls, shift_style);
1383                 break;
1384 #if 0 /* broken */
1385         case SYS_utssys:
1386                 decode_subcall(tcp, SYS_utssys_subcall,
1387                         SYS_utssys_nsubcalls, shift_style);
1388                 break;
1389 #endif
1390         case SYS_sysfs:
1391                 decode_subcall(tcp, SYS_sysfs_subcall,
1392                         SYS_sysfs_nsubcalls, shift_style);
1393                 break;
1394         case SYS_spcall:
1395                 decode_subcall(tcp, SYS_spcall_subcall,
1396                         SYS_spcall_nsubcalls, shift_style);
1397                 break;
1398 #ifdef SYS_context_subcall
1399         case SYS_context:
1400                 decode_subcall(tcp, SYS_context_subcall,
1401                         SYS_context_nsubcalls, shift_style);
1402                 break;
1403 #endif /* SYS_context_subcall */
1404 #ifdef SYS_door_subcall
1405         case SYS_door:
1406                 decode_subcall(tcp, SYS_door_subcall,
1407                         SYS_door_nsubcalls, door_style);
1408                 break;
1409 #endif /* SYS_door_subcall */
1410 #endif /* SVR4 */
1411 #ifdef SUNOS4
1412         case SYS_semsys:
1413                 decode_subcall(tcp, SYS_semsys_subcall,
1414                         SYS_semsys_nsubcalls, shift_style);
1415                 break;
1416         case SYS_msgsys:
1417                 decode_subcall(tcp, SYS_msgsys_subcall,
1418                         SYS_msgsys_nsubcalls, shift_style);
1419                 break;
1420         case SYS_shmsys:
1421                 decode_subcall(tcp, SYS_shmsys_subcall,
1422                         SYS_shmsys_nsubcalls, shift_style);
1423                 break;
1424 #endif
1425         }
1426
1427         internal_syscall(tcp);
1428         if (!(qual_flags[tcp->scno] & QUAL_TRACE)) {
1429                 tcp->flags |= TCB_INSYSCALL;
1430                 return 0;
1431         }
1432
1433         if (cflag) {
1434                 gettimeofday(&tcp->etime, NULL);
1435                 tcp->flags |= TCB_INSYSCALL;
1436                 return 0;
1437         }
1438
1439         printleader(tcp);
1440         tcp->flags &= ~TCB_REPRINT;
1441         tcp_last = tcp;
1442         if (tcp->scno >= nsyscalls)
1443                 tprintf("syscall_%lu(", tcp->scno);
1444         else
1445                 tprintf("%s(", sysent[tcp->scno].sys_name);
1446         if (tcp->scno >= nsyscalls ||
1447             ((qual_flags[tcp->scno] & QUAL_RAW) && tcp->scno != SYS_exit))
1448                 sys_res = printargs(tcp);
1449         else
1450                 sys_res = (*sysent[tcp->scno].sys_func)(tcp);
1451         if (fflush(tcp->outf) == EOF)
1452                 return -1;
1453         tcp->flags |= TCB_INSYSCALL;
1454         /* Measure the entrance time as late as possible to avoid errors. */
1455         if (dtime)
1456                 gettimeofday(&tcp->etime, NULL);
1457         return sys_res;
1458 }
1459
1460 int
1461 printargs(tcp)
1462 struct tcb *tcp;
1463 {
1464         if (entering(tcp)) {
1465                 int i;
1466
1467                 for (i = 0; i < tcp->u_nargs; i++)
1468                         tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
1469         }
1470         return 0;
1471 }
1472
1473 long
1474 getrval2(tcp)
1475 struct tcb *tcp;
1476 {
1477         long val = -1;
1478
1479 #ifdef LINUX
1480 #ifdef SPARC
1481         struct regs regs;
1482         if (ptrace(PTRACE_GETREGS,tcp->pid,(char *)&regs,0) < 0)
1483                 return -1;
1484         val = regs.r_o1;
1485 #endif /* SPARC */
1486 #endif /* LINUX */
1487
1488 #ifdef SUNOS4
1489         if (upeek(tcp->pid, uoff(u_rval2), &val) < 0)
1490                 return -1;
1491 #endif /* SUNOS4 */
1492
1493 #ifdef SVR4
1494 #ifdef SPARC
1495         val = tcp->status.PR_REG[R_O1];
1496 #endif /* SPARC */
1497 #ifdef I386
1498         val = tcp->status.PR_REG[EDX];
1499 #endif /* I386 */
1500 #ifdef MIPS
1501         val = tcp->status.PR_REG[CTX_V1];
1502 #endif /* MIPS */
1503 #endif /* SVR4 */
1504
1505         return val;
1506 }
1507
1508 /*
1509  * Apparently, indirect system calls have already be converted by ptrace(2),
1510  * so if you see "indir" this program has gone astray.
1511  */
1512 int
1513 sys_indir(tcp)
1514 struct tcb *tcp;
1515 {
1516         int i, scno, nargs;
1517
1518         if (entering(tcp)) {
1519                 if ((scno = tcp->u_arg[0]) > nsyscalls) {
1520                         fprintf(stderr, "Bogus syscall: %u\n", scno);
1521                         return 0;
1522                 }
1523                 nargs = sysent[scno].nargs;
1524                 tprintf("%s", sysent[scno].sys_name);
1525                 for (i = 0; i < nargs; i++)
1526                         tprintf(", %#lx", tcp->u_arg[i+1]);
1527         }
1528         return 0;
1529 }
1530
1531 static int
1532 time_cmp(a, b)
1533 void *a;
1534 void *b;
1535 {
1536         return -tv_cmp(&tv_count[*((int *) a)], &tv_count[*((int *) b)]);
1537 }
1538
1539 static int
1540 syscall_cmp(a, b)
1541 void *a;
1542 void *b;
1543 {
1544         return strcmp(sysent[*((int *) a)].sys_name,
1545                 sysent[*((int *) b)].sys_name);
1546 }
1547
1548 static int
1549 count_cmp(a, b)
1550 void *a;
1551 void *b;
1552 {
1553         int m = call_count[*((int *) a)], n = call_count[*((int *) b)];
1554
1555         return (m < n) ? 1 : (m > n) ? -1 : 0;
1556 }
1557
1558 static int (*sortfun)();
1559 static struct timeval overhead = { -1, -1 };
1560
1561 void
1562 set_sortby(sortby)
1563 char *sortby;
1564 {
1565         if (strcmp(sortby, "time") == 0)
1566                 sortfun = time_cmp;
1567         else if (strcmp(sortby, "calls") == 0)
1568                 sortfun = count_cmp;
1569         else if (strcmp(sortby, "name") == 0)
1570                 sortfun = syscall_cmp;
1571         else if (strcmp(sortby, "nothing") == 0)
1572                 sortfun = NULL;
1573         else {
1574                 fprintf(stderr, "invalid sortby: `%s'\n", sortby);
1575                 exit(1);
1576         }
1577 }
1578
1579 void set_overhead(n)
1580 int n;
1581 {
1582         overhead.tv_sec = n / 1000000;
1583         overhead.tv_usec = n % 1000000;
1584 }
1585
1586 void
1587 call_summary(outf)
1588 FILE *outf;
1589 {
1590         int i, j;
1591         int call_cum, error_cum;
1592         struct timeval tv_cum, dtv;
1593         double percent;
1594         char *dashes = "-------------------------";
1595         char error_str[16];
1596
1597         call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0;
1598         if (overhead.tv_sec == -1) {
1599                 tv_mul(&overhead, &shortest, 8);
1600                 tv_div(&overhead, &overhead, 10);
1601         }
1602         for (i = 0; i < nsyscalls; i++) {
1603                 sorted_count[i] = i;
1604                 if (call_count[i] == 0)
1605                         continue;
1606                 tv_mul(&dtv, &overhead, call_count[i]);
1607                 tv_sub(&tv_count[i], &tv_count[i], &dtv);
1608                 call_cum += call_count[i];
1609                 error_cum += error_count[i];
1610                 tv_add(&tv_cum, &tv_cum, &tv_count[i]);
1611         }
1612         if (sortfun)
1613                 qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun);
1614         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n",
1615                 "% time", "seconds", "usecs/call",
1616                 "calls", "errors", "syscall");
1617         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
1618                 dashes, dashes, dashes, dashes, dashes, dashes);
1619         for (i = 0; i < nsyscalls; i++) {
1620                 j = sorted_count[i];
1621                 if (call_count[j] == 0)
1622                         continue;
1623                 tv_div(&dtv, &tv_count[j], call_count[j]);
1624                 if (error_count[j])
1625                         sprintf(error_str, "%d", error_count[j]);
1626                 else
1627                         error_str[0] = '\0';
1628                 percent = 100.0*tv_float(&tv_count[j])/tv_float(&tv_cum);
1629                 fprintf(outf, "%6.2f %4ld.%06ld %11ld %9d %9.9s %s\n",
1630                         percent, (long) tv_count[j].tv_sec,
1631                         (long) tv_count[j].tv_usec,
1632                         (long) 1000000 * dtv.tv_sec + dtv.tv_usec,
1633                         call_count[j], error_str, sysent[j].sys_name);
1634         }
1635         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
1636                 dashes, dashes, dashes, dashes, dashes, dashes);
1637         if (error_cum)
1638                 sprintf(error_str, "%d", error_cum);
1639         else
1640                 error_str[0] = '\0';
1641         fprintf(outf, "%6.6s %4ld.%06ld %11.11s %9d %9.9s %s\n",
1642                 "100.00", (long) tv_cum.tv_sec, (long) tv_cum.tv_usec, "",
1643                 call_cum, error_str, "total");
1644 }