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

   1 /*
   2  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
   3  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
   4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  *
  29  *      $Id$
  30  */
  31
  32 #include "defs.h"
  33
  34 #include <signal.h>
  35 #include <time.h>
  36 #include <errno.h>
  37 #include <sys/user.h>
  38 #include <sys/syscall.h>
  39 #include <sys/param.h>
  40 #if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 1 && (defined(I386) || defined(M68K))
  41 # include <sys/reg.h>
  42 #endif
  43
  44 #ifdef LINUX
  45 #include <linux/ptrace.h>
  46 #endif /* LINUX */
  47
  48 #ifndef SYS_ERRLIST_DECLARED
  49 extern int sys_nerr;
  50 extern char *sys_errlist[];
  51 #endif /* SYS_ERRLIST_DECLARED */
  52
  53 #ifdef LINUX
  54 #ifndef ERESTARTSYS
  55 #define ERESTARTSYS     512
  56 #endif
  57 #ifndef ERESTARTNOINTR
  58 #define ERESTARTNOINTR  513
  59 #endif
  60 #ifndef ERESTARTNOHAND
  61 #define ERESTARTNOHAND  514     /* restart if no handler.. */
  62 #endif
  63 #ifndef ENOIOCTLCMD
  64 #define ENOIOCTLCMD     515     /* No ioctl command */
  65 #endif
  66 #ifndef NSIG
  67 #define NSIG 32
  68 #endif
  69 #ifdef ARM
  70 #undef NSIG
  71 #define NSIG 32
  72 #endif
  73 #endif /* LINUX */
  74
  75 #include "syscall.h"
  76
  77 /* Define these shorthand notations to simplify the syscallent files. */
  78 #define TF TRACE_FILE
  79 #define TI TRACE_IPC
  80 #define TN TRACE_NETWORK
  81 #define TP TRACE_PROCESS
  82 #define TS TRACE_SIGNAL
  83
  84 struct sysent sysent0[] = {
  85 #include "syscallent.h"
  86 };
  87 int nsyscalls0 = sizeof sysent0 / sizeof sysent0[0];
  88
  89 #if SUPPORTED_PERSONALITIES >= 2
  90 struct sysent sysent1[] = {
  91 #include "syscallent1.h"
  92 };
  93 int nsyscalls1 = sizeof sysent1 / sizeof sysent1[0];
  94 #endif /* SUPPORTED_PERSONALITIES >= 2 */
  95
  96 #if SUPPORTED_PERSONALITIES >= 3
  97 struct sysent sysent2[] = {
  98 #include "syscallent2.h"
  99 };
 100 int nsyscalls2 = sizeof sysent2 / sizeof sysent2[0];
 101 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 102
 103 struct sysent *sysent;
 104 int nsyscalls;
 105
 106 /* Now undef them since short defines cause wicked namespace pollution. */
 107 #undef TF
 108 #undef TI
 109 #undef TN
 110 #undef TP
 111 #undef TS
 112
 113 char *errnoent0[] = {
 114 #include "errnoent.h"
 115 };
 116 int nerrnos0 = sizeof errnoent0 / sizeof errnoent0[0];
 117
 118 #if SUPPORTED_PERSONALITIES >= 2
 119 char *errnoent1[] = {
 120 #include "errnoent1.h"
 121 };
 122 int nerrnos1 = sizeof errnoent1 / sizeof errnoent1[0];
 123 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 124
 125 #if SUPPORTED_PERSONALITIES >= 3
 126 char *errnoent2[] = {
 127 #include "errnoent2.h"
 128 };
 129 int nerrnos2 = sizeof errnoent2 / sizeof errnoent2[0];
 130 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 131
 132 char **errnoent;
 133 int nerrnos;
 134
 135 int current_personality;
 136
 137 int
 138 set_personality(int personality)
 139 {
 140         switch (personality) {
 141         case 0:
 142                 errnoent = errnoent0;
 143                 nerrnos = nerrnos0;
 144                 sysent = sysent0;
 145                 nsyscalls = nsyscalls0;
 146                 ioctlent = ioctlent0;
 147                 nioctlents = nioctlents0;
 148                 signalent = signalent0;
 149                 nsignals = nsignals0;
 150                 break;
 151
 152 #if SUPPORTED_PERSONALITIES >= 2
 153         case 1:
 154                 errnoent = errnoent1;
 155                 nerrnos = nerrnos1;
 156                 sysent = sysent1;
 157                 nsyscalls = nsyscalls1;
 158                 ioctlent = ioctlent1;
 159                 nioctlents = nioctlents1;
 160                 signalent = signalent1;
 161                 nsignals = nsignals1;
 162                 break;
 163 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 164
 165 #if SUPPORTED_PERSONALITIES >= 3
 166         case 2:
 167                 errnoent = errnoent2;
 168                 nerrnos = nerrnos2;
 169                 sysent = sysent2;
 170                 nsyscalls = nsyscalls2;
 171                 ioctlent = ioctlent2;
 172                 nioctlents = nioctlents2;
 173                 signalent = signalent2;
 174                 nsignals = nsignals2;
 175                 break;
 176 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 177
 178         default:
 179                 return -1;
 180         }
 181
 182         current_personality = personality;
 183         return 0;
 184 }
 185
 186 int qual_flags[MAX_QUALS];
 187
 188 static int call_count[MAX_QUALS];
 189 static int error_count[MAX_QUALS];
 190 static struct timeval tv_count[MAX_QUALS];
 191 static int sorted_count[MAX_QUALS];
 192
 193 static struct timeval shortest = { 1000000, 0 };
 194
 195 static int lookup_syscall(), lookup_signal(), lookup_fault(), lookup_desc();
 196
 197 static struct qual_options {
 198         int bitflag;
 199         char *option_name;
 200         int (*lookup)();
 201         char *argument_name;
 202 } qual_options[] = {
 203         { QUAL_TRACE,   "trace",        lookup_syscall, "system call"   },
 204         { QUAL_TRACE,   "t",            lookup_syscall, "system call"   },
 205         { QUAL_ABBREV,  "abbrev",       lookup_syscall, "system call"   },
 206         { QUAL_ABBREV,  "a",            lookup_syscall, "system call"   },
 207         { QUAL_VERBOSE, "verbose",      lookup_syscall, "system call"   },
 208         { QUAL_VERBOSE, "v",            lookup_syscall, "system call"   },
 209         { QUAL_RAW,     "raw",          lookup_syscall, "system call"   },
 210         { QUAL_RAW,     "x",            lookup_syscall, "system call"   },
 211         { QUAL_SIGNAL,  "signal",       lookup_signal,  "signal"        },
 212         { QUAL_SIGNAL,  "signals",      lookup_signal,  "signal"        },
 213         { QUAL_SIGNAL,  "s",            lookup_signal,  "signal"        },
 214         { QUAL_FAULT,   "fault",        lookup_fault,   "fault"         },
 215         { QUAL_FAULT,   "faults",       lookup_fault,   "fault"         },
 216         { QUAL_FAULT,   "m",            lookup_fault,   "fault"         },
 217         { QUAL_READ,    "read",         lookup_desc,    "descriptor"    },
 218         { QUAL_READ,    "reads",        lookup_desc,    "descriptor"    },
 219         { QUAL_READ,    "r",            lookup_desc,    "descriptor"    },
 220         { QUAL_WRITE,   "write",        lookup_desc,    "descriptor"    },
 221         { QUAL_WRITE,   "writes",       lookup_desc,    "descriptor"    },
 222         { QUAL_WRITE,   "w",            lookup_desc,    "descriptor"    },
 223         { 0,            NULL,           NULL,           NULL            },
 224 };
 225
 226 static int
 227 lookup_syscall(s)
 228 char *s;
 229 {
 230         int i;
 231
 232         for (i = 0; i < nsyscalls; i++) {
 233                 if (strcmp(s, sysent[i].sys_name) == 0)
 234                         return i;
 235         }
 236         return -1;
 237 }
 238
 239 static int
 240 lookup_signal(s)
 241 char *s;
 242 {
 243         int i;
 244         char buf[32];
 245
 246         if (s && *s && isdigit(*s))
 247                 return atoi(s);
 248         strcpy(buf, s);
 249         s = buf;
 250         for (i = 0; s[i]; i++)
 251                 s[i] = toupper(s[i]);
 252         if (strncmp(s, "SIG", 3) == 0)
 253                 s += 3;
 254         for (i = 0; i <= NSIG; i++) {
 255                 if (strcmp(s, signame(i) + 3) == 0)
 256                         return i;
 257         }
 258         return -1;
 259 }
 260
 261 static int
 262 lookup_fault(s)
 263 char *s;
 264 {
 265         return -1;
 266 }
 267
 268 static int
 269 lookup_desc(s)
 270 char *s;
 271 {
 272         if (s && *s && isdigit(*s))
 273                 return atoi(s);
 274         return -1;
 275 }
 276
 277 static int
 278 lookup_class(s)
 279 char *s;
 280 {
 281         if (strcmp(s, "file") == 0)
 282                 return TRACE_FILE;
 283         if (strcmp(s, "ipc") == 0)
 284                 return TRACE_IPC;
 285         if (strcmp(s, "network") == 0)
 286                 return TRACE_NETWORK;
 287         if (strcmp(s, "process") == 0)
 288                 return TRACE_PROCESS;
 289         if (strcmp(s, "signal") == 0)
 290                 return TRACE_SIGNAL;
 291         return -1;
 292 }
 293
 294 void
 295 qualify(s)
 296 char *s;
 297 {
 298         struct qual_options *opt;
 299         int not;
 300         char *p;
 301         int i, n;
 302
 303         opt = &qual_options[0];
 304         for (i = 0; (p = qual_options[i].option_name); i++) {
 305                 n = strlen(p);
 306                 if (strncmp(s, p, n) == 0 && s[n] == '=') {
 307                         opt = &qual_options[i];
 308                         s += n + 1;
 309                         break;
 310                 }
 311         }
 312         not = 0;
 313         if (*s == '!') {
 314                 not = 1;
 315                 s++;
 316         }
 317         if (strcmp(s, "none") == 0) {
 318                 not = 1 - not;
 319                 s = "all";
 320         }
 321         if (strcmp(s, "all") == 0) {
 322                 for (i = 0; i < MAX_QUALS; i++) {
 323                         if (not)
 324                                 qual_flags[i] &= ~opt->bitflag;
 325                         else
 326                                 qual_flags[i] |= opt->bitflag;
 327                 }
 328                 return;
 329         }
 330         for (i = 0; i < MAX_QUALS; i++) {
 331                 if (not)
 332                         qual_flags[i] |= opt->bitflag;
 333                 else
 334                         qual_flags[i] &= ~opt->bitflag;
 335         }
 336         for (p = strtok(s, ","); p; p = strtok(NULL, ",")) {
 337                 if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
 338                         for (i = 0; i < MAX_QUALS; i++) {
 339                                 if (sysent[i].sys_flags & n) {
 340                                         if (not)
 341                                                 qual_flags[i] &= ~opt->bitflag;
 342                                         else
 343                                                 qual_flags[i] |= opt->bitflag;
 344                                 }
 345                         }
 346                         continue;
 347                 }
 348                 if ((n = (*opt->lookup)(p)) < 0) {
 349                         fprintf(stderr, "strace: invalid %s `%s'\n",
 350                                 opt->argument_name, p);
 351                         exit(1);
 352                 }
 353                 if (not)
 354                         qual_flags[n] &= ~opt->bitflag;
 355                 else
 356                         qual_flags[n] |= opt->bitflag;
 357         }
 358         return;
 359 }
 360
 361 static void
 362 dumpio(tcp)
 363 struct tcb *tcp;
 364 {
 365         if (syserror(tcp))
 366                 return;
 367         if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= MAX_QUALS)
 368                 return;
 369 #ifdef __arm__
 370         switch (tcp->scno + __NR_SYSCALL_BASE) {
 371 #else
 372         switch (tcp->scno) {
 373 #endif
 374         case SYS_read:
 375 #ifdef SYS_recv
 376         case SYS_recv:
 377 #endif
 378 #ifdef SYS_recvfrom
 379         case SYS_recvfrom:
 380 #endif
 381                 if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
 382                         dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
 383                 break;
 384         case SYS_write:
 385 #ifdef SYS_send
 386         case SYS_send:
 387 #endif
 388 #ifdef SYS_sendto
 389         case SYS_sendto:
 390 #endif
 391                 if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
 392                         dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 393                 break;
 394         }
 395 }
 396
 397 enum subcall_style { shift_style, deref_style, mask_style };
 398
 399 #if !(defined(LINUX) && defined(ALPHA))
 400
 401 const int socket_map [] = {
 402                /* SYS_SOCKET      */ 97,
 403                /* SYS_BIND        */ 104,
 404                /* SYS_CONNECT     */ 98,
 405                /* SYS_LISTEN      */ 106,
 406                /* SYS_ACCEPT      */ 99,
 407                /* SYS_GETSOCKNAME */ 150,
 408                /* SYS_GETPEERNAME */ 141,
 409                /* SYS_SOCKETPAIR  */ 135,
 410                /* SYS_SEND        */ 101,
 411                /* SYS_RECV        */ 102,
 412                /* SYS_SENDTO      */ 133,
 413                /* SYS_RECVFROM    */ 125,
 414                /* SYS_SHUTDOWN    */ 134,
 415                /* SYS_SETSOCKOPT  */ 105,
 416                /* SYS_GETSOCKOPT  */ 118,
 417                /* SYS_SENDMSG     */ 114,
 418                /* SYS_RECVMSG     */ 113
 419 };
 420
 421 void
 422 sparc_socket_decode (struct tcb *tcp)
 423 {
 424         volatile long addr;
 425         volatile int i, n;
 426
 427         if (tcp->u_arg [0] < 1 || tcp->u_arg [0] > sizeof(socket_map)/sizeof(int)+1){
 428                 return;
 429         }
 430         tcp->scno = socket_map [tcp->u_arg [0]-1];
 431         n = tcp->u_nargs = sysent [tcp->scno].nargs;
 432         addr = tcp->u_arg [1];
 433         for (i = 0; i < n; i++){
 434                 int arg;
 435                 if (umoven (tcp, addr, sizeof (arg), (void *) &arg) < 0)
 436                         arg = 0;
 437                 tcp->u_arg [i] = arg;
 438                 addr += sizeof (arg);
 439         }
 440 }
 441
 442 static void
 443 decode_subcall(tcp, subcall, nsubcalls, style)
 444 struct tcb *tcp;
 445 int subcall;
 446 int nsubcalls;
 447 enum subcall_style style;
 448 {
 449         int i, addr, mask, arg;
 450
 451         if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
 452                 return;
 453         switch (style) {
 454         case shift_style:
 455                 tcp->scno = subcall + tcp->u_arg[0];
 456                 if (sysent[tcp->scno].nargs != -1)
 457                         tcp->u_nargs = sysent[tcp->scno].nargs;
 458                 else
 459                         tcp->u_nargs--;
 460                 for (i = 0; i < tcp->u_nargs; i++)
 461                         tcp->u_arg[i] = tcp->u_arg[i + 1];
 462                 break;
 463         case deref_style:
 464                 tcp->scno = subcall + tcp->u_arg[0];
 465                 addr = tcp->u_arg[1];
 466                 for (i = 0; i < sysent[tcp->scno].nargs; i++) {
 467                         if (umove(tcp, addr, &arg) < 0)
 468                                 arg = 0;
 469                         tcp->u_arg[i] = arg;
 470                         addr += sizeof(arg);
 471                 }
 472                 tcp->u_nargs = sysent[tcp->scno].nargs;
 473                 break;
 474         case mask_style:
 475                 mask = (tcp->u_arg[0] >> 8) & 0xff;
 476                 tcp->u_arg[0] &= 0xff;
 477                 for (i = 0; mask; i++)
 478                         mask >>= 1;
 479                 tcp->scno = subcall + i;
 480                 if (sysent[tcp->scno].nargs != -1)
 481                         tcp->u_nargs = sysent[tcp->scno].nargs;
 482                 break;
 483         }
 484 }
 485 #endif
 486
 487 struct tcb *tcp_last = NULL;
 488
 489 static int
 490 internal_syscall(tcp)
 491 struct tcb *tcp;
 492 {
 493         /*
 494          * We must always trace a few critical system calls in order to
 495          * correctly support following forks in the presence of tracing
 496          * qualifiers.
 497          */
 498 #ifdef __arm__
 499         switch (tcp->scno + __NR_SYSCALL_BASE) {
 500 #else
 501         switch (tcp->scno) {
 502 #endif
 503 #ifdef SYS_fork
 504         case SYS_fork:
 505 #endif
 506 #ifdef SYS_vfork
 507         case SYS_vfork:
 508 #endif
 509 #ifdef SYS_clone
 510         case SYS_clone:
 511 #endif
 512                 internal_fork(tcp);
 513                 break;
 514
 515 #ifdef SYS_execv
 516         case SYS_execv:
 517 #endif
 518 #ifdef SYS_execve
 519         case SYS_execve:
 520 #endif
 521                 internal_exec(tcp);
 522                 break;
 523
 524 #ifdef SYS_wait
 525         case SYS_wait:
 526 #endif
 527 #ifdef SYS_wait4
 528         case SYS_wait4:
 529 #endif
 530 #ifdef SYS_waitpid
 531         case SYS_waitpid:
 532 #endif
 533 #ifdef SYS_waitsys
 534         case SYS_waitsys:
 535 #endif
 536                 internal_wait(tcp);
 537                 break;
 538
 539 #ifdef SYS_exit
 540         case SYS_exit:
 541 #endif
 542                 internal_exit(tcp);
 543                 break;
 544         }
 545         return 0;
 546 }
 547
 548 int
 549 trace_syscall(tcp)
 550 struct tcb *tcp;
 551 {
 552         int sys_res;
 553         struct timeval tv;
 554         long scno = 0;
 555 #ifdef LINUX
 556 #if defined (I386)
 557         long eax;
 558 #elif defined (POWERPC)
 559         long result,flags;
 560 #elif defined (M68K)
 561         int d0;
 562 #elif defined (ARM)
 563         int r0;
 564 #elif defined (ALPHA)
 565         long r0;
 566         long a3;
 567 #elif defined (SPARC)
 568         struct pt_regs regs;
 569         unsigned long trap;
 570 #endif
 571 #endif /* LINUX */
 572
 573 #ifndef SVR4
 574         int pid = tcp->pid;
 575 #endif /* !SVR4 */
 576
 577         /* Measure the exit time as early as possible to avoid errors. */
 578         if (dtime && (tcp->flags & TCB_INSYSCALL))
 579                 gettimeofday(&tv, NULL);
 580 #ifdef LINUX
 581 #if defined (POWERPC)
 582         if (upeek(pid, 4*PT_R0, &scno) < 0)
 583                 return -1;
 584         if (!(tcp->flags & TCB_INSYSCALL)) {
 585                 /* Check if we return from execve. */
 586                 if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) {
 587                         tcp->flags &= ~TCB_WAITEXECVE;
 588                         return 0;
 589                 }
 590         }
 591 #elif defined (I386)
 592         if (upeek(pid, 4*ORIG_EAX, &scno) < 0)
 593                 return -1;
 594 #elif defined (ARM)
 595         {
 596             long pc;
 597             upeek(pid, 4*15, &pc);
 598             umoven(tcp, pc-4, 4, (char *)&scno);
 599             scno &= 0x000fffff;
 600         }
 601 #elif defined (M68K)
 602         if (upeek(pid, 4*PT_ORIG_D0, &scno) < 0)
 603                 return -1;
 604 #elif defined (ALPHA)
 605         if (upeek(pid, REG_A3, &a3) < 0)
 606                 return -1;
 607
 608         if (!(tcp->flags & TCB_INSYSCALL)) {
 609                 if (upeek(pid, REG_R0, &scno) < 0)
 610                         return -1;
 611
 612                 /* Check if we return from execve. */
 613                 if (scno == 0 && tcp->flags & TCB_WAITEXECVE) {
 614                         tcp->flags &= ~TCB_WAITEXECVE;
 615                         return 0;
 616                 }
 617
 618                 /*
 619                  * Do some sanity checks to figure out if it's
 620                  * really a syscall entry
 621                  */
 622                 if (scno < 0 || scno > nsyscalls) {
 623                         if (a3 == 0 || a3 == -1) {
 624                                 if (debug)
 625                                         fprintf (stderr, "stray syscall exit: r0 = %ld\n", scno);
 626                                 return 0;
 627                         }
 628                 }
 629         }
 630         else {
 631                 if (upeek(pid, REG_R0, &r0) < 0)
 632                         return -1;
 633         }
 634 #elif defined (SPARC)
 635         /* Everything we need is in the current register set. */
 636         if (ptrace(PTRACE_GETREGS,pid,(char *)&regs,0) < 0)
 637                 return -1;
 638
 639         memmove (&regs.u_regs [1], &regs.u_regs [0],
 640                  sizeof (regs.u_regs) - sizeof (regs.u_regs [0]));
 641
 642         /* If we are entering, then disassemble the syscall trap. */
 643         if (!(tcp->flags & TCB_INSYSCALL)) {
 644                 /* Retrieve the syscall trap instruction. */
 645                 errno = 0;
 646                 trap = ptrace(PTRACE_PEEKTEXT,pid,(char *)regs.pc,0);
 647                 if (errno)
 648                         return -1;
 649
 650                 /* Disassemble the trap to see what personality to use. */
 651                 switch (trap) {
 652                 case 0x91d02010:
 653                         /* Linux/SPARC syscall trap. */
 654                         set_personality(0);
 655                         break;
 656                 case 0x91d02000:
 657                         /* SunOS syscall trap. (pers 1) */
 658                         fprintf(stderr,"syscall: SunOS no support\n");
 659                         return -1;
 660                 case 0x91d02008:
 661                         /* Solaris 2.x syscall trap. (per 2) */
 662                         set_personality(1);
 663                         break;
 664                 case 0x91d02009:
 665                         /* NetBSD/FreeBSD syscall trap. */
 666                         fprintf(stderr,"syscall: NetBSD/FreeBSD not supported\n");
 667                         return -1;
 668                 case 0x91d02027:
 669                         /* Solaris 2.x gettimeofday */
 670                         set_personality(1);
 671                         break;
 672                 default:
 673                         /* Unknown syscall trap. */
 674                         if(tcp->flags & TCB_WAITEXECVE) {
 675                                 tcp->flags &= ~TCB_WAITEXECVE;
 676                                 return 0;
 677                         }
 678                         fprintf(stderr,"syscall: unknown syscall trap %08x %08x\n", trap, regs.pc);
 679                         return -1;
 680                 }
 681
 682                 /* Extract the system call number from the registers. */
 683                 if (trap == 0x91d02027)
 684                         scno = 156;
 685                 else
 686                         scno = regs.u_regs[UREG_G1];
 687                 if (scno == 0) {
 688                         scno = regs.u_regs[UREG_I0];
 689                         memmove (&regs.u_regs[UREG_I0], &regs.u_regs[UREG_I1], 7*sizeof(regs.u_regs[0]));
 690                 }
 691         }
 692 #endif
 693 #endif /* LINUX */
 694 #ifdef SUNOS4
 695         if (upeek(pid, uoff(u_arg[7]), &scno) < 0)
 696                 return -1;
 697 #endif
 698 #ifdef SVR4
 699 #ifdef HAVE_PR_SYSCALL
 700         scno = tcp->status.pr_syscall;
 701 #else /* !HAVE_PR_SYSCALL */
 702         scno = tcp->status.pr_what;
 703 #endif /* !HAVE_PR_SYSCALL */
 704         if (!(tcp->flags & TCB_INSYSCALL)) {
 705                 if (tcp->status.pr_why != PR_SYSENTRY) {
 706                         if (
 707                             scno == SYS_fork
 708 #ifdef SYS_vfork
 709                             || scno == SYS_vfork
 710 #endif /* SYS_vfork */
 711                             ) {
 712                                 /* We are returning in the child, fake it. */
 713                                 tcp->status.pr_why = PR_SYSENTRY;
 714                                 trace_syscall(tcp);
 715                                 tcp->status.pr_why = PR_SYSEXIT;
 716                         }
 717                         else {
 718                                 fprintf(stderr, "syscall: missing entry\n");
 719                                 tcp->flags |= TCB_INSYSCALL;
 720                         }
 721                 }
 722         }
 723         else {
 724                 if (tcp->status.pr_why != PR_SYSEXIT) {
 725                         fprintf(stderr, "syscall: missing exit\n");
 726                         tcp->flags &= ~TCB_INSYSCALL;
 727                 }
 728         }
 729 #endif /* SVR4 */
 730 #ifdef SUNOS4
 731         if (!(tcp->flags & TCB_INSYSCALL)) {
 732                 if (scno == 0) {
 733                         fprintf(stderr, "syscall: missing entry\n");
 734                         tcp->flags |= TCB_INSYSCALL;
 735                 }
 736         }
 737         else {
 738                 if (scno != 0) {
 739                         if (debug) {
 740                                 /*
 741                                  * This happens when a signal handler
 742                                  * for a signal which interrupted a
 743                                  * a system call makes another system call.
 744                                  */
 745                                 fprintf(stderr, "syscall: missing exit\n");
 746                         }
 747                         tcp->flags &= ~TCB_INSYSCALL;
 748                 }
 749         }
 750 #endif /* SUNOS4 */
 751 #ifdef LINUX
 752 #if defined (I386)
 753         if (upeek(pid, 4*EAX, &eax) < 0)
 754                 return -1;
 755         if (eax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 756                 if (debug)
 757                         fprintf(stderr, "stray syscall exit: eax = %ld\n", eax);
 758                 return 0;
 759         }
 760 #elif defined (POWERPC)
 761 # define SO_MASK 0x10000000
 762         if (upeek(pid, 4*PT_CCR, &flags) < 0)
 763                 return -1;
 764         if (upeek(pid, 4*PT_R3, &result) < 0)
 765                 return -1;
 766         if (flags & SO_MASK)
 767                 result = -result;
 768 #elif defined (M68K)
 769         if (upeek(pid, 4*PT_D0, &d0) < 0)
 770                 return -1;
 771         if (d0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 772                 if (debug)
 773                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", d0);
 774                 return 0;
 775         }
 776 #elif defined (ARM)
 777         if (upeek(pid, 4*0, (long *)&r0) < 0)
 778                 return -1;
 779         if ( 0 && r0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 780                 if (debug)
 781                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", r0);
 782                 return 0;
 783         }
 784 #else
 785 #endif
 786 #endif /* LINUX */
 787
 788         if (tcp->flags & TCB_INSYSCALL) {
 789                 long u_error;
 790
 791 #ifdef LINUX
 792 #ifdef I386
 793                 if (eax < 0 && -eax < nerrnos) {
 794                         tcp->u_rval = -1;
 795                         u_error = -eax;
 796                 }
 797                 else {
 798                         tcp->u_rval = eax;
 799                         u_error = 0;
 800                 }
 801 #else /* !I386 */
 802 #ifdef POWERPC
 803                 if (result && (unsigned) -result < nerrnos) {
 804                         tcp->u_rval = -1;
 805                         u_error = -result;
 806                 }
 807                 else {
 808                         tcp->u_rval = result;
 809                         u_error = 0;
 810                 }
 811 #else /* !POWERPC */
 812 #ifdef M68K
 813                 if (d0 && (unsigned) -d0 < nerrnos) {
 814                         tcp->u_rval = -1;
 815                         u_error = -d0;
 816                 }
 817                 else {
 818                         tcp->u_rval = d0;
 819                         u_error = 0;
 820                 }
 821 #else /* !M68K */
 822 #ifdef ARM
 823                 if (r0 && (unsigned) -r0 < nerrnos) {
 824                         tcp->u_rval = -1;
 825                         u_error = -r0;
 826                 }
 827                 else {
 828                         tcp->u_rval = r0;
 829                         u_error = 0;
 830                 }
 831 #else /* !ARM */
 832 #ifdef ALPHA
 833                 if (a3) {
 834                         tcp->u_rval = -1;
 835                         u_error = r0;
 836                 }
 837                 else {
 838                         tcp->u_rval = r0;
 839                         u_error = 0;
 840                 }
 841 #else /* !ALPHA */
 842 #ifdef SPARC
 843                 if (regs.psr & PSR_C) {
 844                         tcp->u_rval = -1;
 845                         u_error = regs.u_regs[UREG_I0];
 846                 }
 847                 else {
 848                         tcp->u_rval = regs.u_regs[UREG_I0];
 849                         u_error = 0;
 850                 }
 851 #endif /* SPARC */
 852 #endif /* ALPHA */
 853 #endif /* ARM */
 854 #endif /* M68K */
 855 #endif /* POWERPC */
 856 #endif /* I386 */
 857 #endif /* LINUX */
 858 #ifdef SUNOS4
 859                 /* get error code from user struct */
 860                 if (upeek(pid, uoff(u_error), &u_error) < 0)
 861                         return -1;
 862                 u_error >>= 24; /* u_error is a char */
 863
 864                 /* get system call return value */
 865                 if (upeek(pid, uoff(u_rval1), &tcp->u_rval) < 0)
 866                         return -1;
 867 #endif /* SUNOS4 */
 868 #ifdef SVR4
 869 #ifdef SPARC
 870                 /* Judicious guessing goes a long way. */
 871                 if (tcp->status.pr_reg[R_PSR] & 0x100000) {
 872                         tcp->u_rval = -1;
 873                         u_error = tcp->status.pr_reg[R_O0];
 874                 }
 875                 else {
 876                         tcp->u_rval = tcp->status.pr_reg[R_O0];
 877                         u_error = 0;
 878                 }
 879 #endif /* SPARC */
 880 #ifdef I386
 881                 /* Wanna know how to kill an hour single-stepping? */
 882                 if (tcp->status.pr_reg[EFL] & 0x1) {
 883                         tcp->u_rval = -1;
 884                         u_error = tcp->status.pr_reg[EAX];
 885                 }
 886                 else {
 887                         tcp->u_rval = tcp->status.pr_reg[EAX];
 888                         u_error = 0;
 889                 }
 890 #endif /* I386 */
 891 #ifdef MIPS
 892                 if (tcp->status.pr_reg[CTX_A3]) {
 893                         tcp->u_rval = -1;
 894                         u_error = tcp->status.pr_reg[CTX_V0];
 895                 }
 896                 else {
 897                         tcp->u_rval = tcp->status.pr_reg[CTX_V0];
 898                         u_error = 0;
 899                 }
 900 #endif /* MIPS */
 901 #endif /* SVR4 */
 902                 tcp->u_error = u_error;
 903
 904                 internal_syscall(tcp);
 905                 if (!(qual_flags[tcp->scno] & QUAL_TRACE)) {
 906                         tcp->flags &= ~TCB_INSYSCALL;
 907                         return 0;
 908                 }
 909
 910                 if (tcp->flags & TCB_REPRINT) {
 911                         printleader(tcp);
 912                         tprintf("<... ");
 913                         if (tcp->scno >= nsyscalls)
 914                                 tprintf("syscall_%lu", tcp->scno);
 915                         else
 916                                 tprintf("%s", sysent[tcp->scno].sys_name);
 917                         tprintf(" resumed> ");
 918                 }
 919
 920                 if (cflag) {
 921                         call_count[tcp->scno]++;
 922                         if (u_error)
 923                                 error_count[tcp->scno]++;
 924                         tv_sub(&tv, &tv, &tcp->etime);
 925 #ifdef LINUX
 926                         if (tv_cmp(&tv, &tcp->dtime) > 0) {
 927                                 static struct timeval one_tick =
 928                                         { 0, 1000000 / HZ };
 929
 930                                 if (tv_nz(&tcp->dtime))
 931                                         tv = tcp->dtime;
 932                                 else if (tv_cmp(&tv, &one_tick) > 0) {
 933                                         if (tv_cmp(&shortest, &one_tick) < 0)
 934                                                 tv = shortest;
 935                                         else
 936                                                 tv = one_tick;
 937                                 }
 938                         }
 939 #endif /* LINUX */
 940                         if (tv_cmp(&tv, &shortest) < 0)
 941                                 shortest = tv;
 942                         tv_add(&tv_count[tcp->scno],
 943                                 &tv_count[tcp->scno], &tv);
 944                         tcp->flags &= ~TCB_INSYSCALL;
 945                         return 0;
 946                 }
 947
 948                 if (tcp->scno >= nsyscalls
 949                     || (qual_flags[tcp->scno] & QUAL_RAW))
 950                         sys_res = printargs(tcp);
 951                 else
 952                         sys_res = (*sysent[tcp->scno].sys_func)(tcp);
 953                 u_error = tcp->u_error;
 954                 tprintf(") ");
 955                 tabto(acolumn);
 956                 if (qual_flags[tcp->scno] & QUAL_RAW) {
 957                         if (u_error)
 958                                 tprintf("= -1 (errno %ld)", u_error);
 959                         else
 960                                 tprintf("= %#lx", tcp->u_rval);
 961                 }
 962                 else if (!(sys_res & RVAL_NONE) && u_error) {
 963 #ifdef LINUX
 964                         switch (u_error) {
 965                         case ERESTARTSYS:
 966                                 tprintf("= ? ERESTARTSYS (To be restarted)");
 967                                 break;
 968                         case ERESTARTNOINTR:
 969                                 tprintf("= ? ERESTARTNOINTR (To be restarted)");
 970                                 break;
 971                         case ERESTARTNOHAND:
 972                                 tprintf("= ? ERESTARTNOHAND (To be restarted)");
 973                                 break;
 974                         default:
 975 #endif /* LINUX */
 976                                 tprintf("= -1 ");
 977                                 if (u_error < nerrnos && u_error < sys_nerr)
 978                                         tprintf("%s (%s)", errnoent[u_error],
 979                                                 sys_errlist[u_error]);
 980                                 else if (u_error < nerrnos)
 981                                         tprintf("%s (errno %ld)",
 982                                                 errnoent[u_error], u_error);
 983                                 else if (u_error < sys_nerr)
 984                                         tprintf("ERRNO_%ld (%s)", u_error,
 985                                                 sys_errlist[u_error]);
 986                                 else
 987                                         tprintf("E??? (errno %ld)", u_error);
 988 #ifdef LINUX
 989                                 break;
 990                         }
 991 #endif /* LINUX */
 992                 }
 993                 else {
 994                         if (sys_res & RVAL_NONE)
 995                                 tprintf("= ?");
 996                         else {
 997                                 switch (sys_res & RVAL_MASK) {
 998                                 case RVAL_HEX:
 999                                         tprintf("= %#lx", tcp->u_rval);
1000                                         break;
1001                                 case RVAL_OCTAL:
1002                                         tprintf("= %#lo", tcp->u_rval);
1003                                         break;
1004                                 case RVAL_UDECIMAL:
1005                                         tprintf("= %lu", tcp->u_rval);
1006                                         break;
1007                                 case RVAL_DECIMAL:
1008                                         tprintf("= %ld", tcp->u_rval);
1009                                         break;
1010                                 default:
1011                                         fprintf(stderr,
1012                                                 "invalid rval format\n");
1013                                         break;
1014                                 }
1015                         }
1016                         if ((sys_res & RVAL_STR) && tcp->auxstr)
1017                                 tprintf(" (%s)", tcp->auxstr);
1018                 }
1019                 if (dtime) {
1020                         tv_sub(&tv, &tv, &tcp->etime);
1021                         tprintf(" <%ld.%06ld>",
1022                                 (long) tv.tv_sec, (long) tv.tv_usec);
1023                 }
1024                 printtrailer(tcp);
1025
1026                 dumpio(tcp);
1027                 if (fflush(tcp->outf) == EOF)
1028                         return -1;
1029                 tcp->flags &= ~TCB_INSYSCALL;
1030                 return 0;
1031         }
1032
1033         /* Entering system call */
1034         tcp->scno = scno;
1035 #ifdef LINUX
1036 #if defined (ALPHA)
1037         {
1038                 int i;
1039                 tcp->u_nargs = sysent[tcp->scno].nargs;
1040                 for (i = 0; i < tcp->u_nargs; i++) {
1041                         if (upeek(pid, REG_A0+i, &tcp->u_arg[i]) < 0)
1042                                 return -1;
1043                 }
1044         }
1045 #elif defined (POWERPC)
1046         {
1047                 int i;
1048                 tcp->u_nargs = sysent[tcp->scno].nargs;
1049                 for (i = 0; i < tcp->u_nargs; i++) {
1050                         if (upeek(pid, (i==0) ? (4*PT_ORIG_R3) : ((i+PT_R3)*4), &tcp->u_arg[i]) < 0)
1051                                 return -1;
1052                 }
1053         }
1054 #elif defined (SPARC)
1055         {
1056                 int i, offset;
1057
1058                 offset = UREG_I0;
1059                 tcp->u_nargs = sysent[tcp->scno].nargs;
1060                 for (i = 0; i < tcp->u_nargs; i++)
1061                         tcp->u_arg[i] = regs.u_regs[offset + i];
1062         }
1063 #else
1064         {
1065                 int i;
1066                 tcp->u_nargs = sysent[tcp->scno].nargs;
1067                 for (i = 0; i < tcp->u_nargs; i++) {
1068                         if (upeek(pid, i*4, &tcp->u_arg[i]) < 0)
1069                                 return -1;
1070                 }
1071         }
1072 #endif
1073 #endif /* LINUX */
1074 #ifdef SUNOS4
1075         {
1076                 int i;
1077                 tcp->u_nargs = sysent[tcp->scno].nargs;
1078                 for (i = 0; i < tcp->u_nargs; i++) {
1079                         struct user *u;
1080
1081                         if (upeek(pid, uoff(u_arg[0]) +
1082                             (i*sizeof(u->u_arg[0])), &tcp->u_arg[i]) < 0)
1083                                 return -1;
1084                 }
1085         }
1086 #endif /* SUNOS4 */
1087 #ifdef SVR4
1088 #ifdef MIPS
1089         /*
1090          * SGI is broken: even though it has pr_sysarg, it doesn't
1091          * set them on system call entry.  Get a clue.
1092          */
1093         if (sysent[tcp->scno].nargs != -1)
1094                 tcp->u_nargs = sysent[tcp->scno].nargs;
1095         else
1096                 tcp->u_nargs = tcp->status.pr_nsysarg;
1097         if (tcp->u_nargs > 4) {
1098                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1099                         4*sizeof(tcp->u_arg[0]));
1100                 umoven(tcp, tcp->status.pr_reg[CTX_SP] + 16,
1101                         (tcp->u_nargs - 4)*sizeof(tcp->u_arg[0]), (char *) (tcp->u_arg + 4));
1102         }
1103         else {
1104                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1105                         tcp->u_nargs*sizeof(tcp->u_arg[0]));
1106         }
1107 #else /* !MIPS */
1108 #ifdef HAVE_PR_SYSCALL
1109         if (sysent[tcp->scno].nargs != -1)
1110                 tcp->u_nargs = sysent[tcp->scno].nargs;
1111         else
1112                 tcp->u_nargs = tcp->status.pr_nsysarg;
1113         {
1114                 int i;
1115                 for (i = 0; i < tcp->u_nargs; i++)
1116                         tcp->u_arg[i] = tcp->status.pr_sysarg[i];
1117         }
1118 #else /* !HAVE_PR_SYSCALL */
1119 #ifdef I386
1120         if (sysent[tcp->scno].nargs != -1)
1121                 tcp->u_nargs = sysent[tcp->scno].nargs;
1122         else
1123                 tcp->u_nargs = 5;
1124         umoven(tcp, tcp->status.pr_reg[UESP] + 4,
1125                 tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
1126 #endif /* I386 */
1127 #endif /* !HAVE_PR_SYSCALL */
1128 #endif /* !MIPS */
1129 #endif /* SVR4 */
1130 #ifdef __arm__
1131         switch (tcp->scno + __NR_SYSCALL_BASE) {
1132 #else
1133         switch (tcp->scno) {
1134 #endif
1135 #ifdef LINUX
1136 #if !defined (ALPHA) && !defined(SPARC)
1137         case SYS_socketcall:
1138                 decode_subcall(tcp, SYS_socket_subcall,
1139                         SYS_socket_nsubcalls, deref_style);
1140                 break;
1141         case SYS_ipc:
1142                 decode_subcall(tcp, SYS_ipc_subcall,
1143                         SYS_ipc_nsubcalls, shift_style);
1144                 break;
1145 #endif /* !ALPHA && !SPARC */
1146 #ifdef SPARC
1147         case SYS_socketcall:
1148                 sparc_socket_decode (tcp);
1149                 break;
1150 #endif
1151 #endif /* LINUX */
1152 #ifdef SVR4
1153 #ifdef SYS_pgrpsys_subcall
1154         case SYS_pgrpsys:
1155                 decode_subcall(tcp, SYS_pgrpsys_subcall,
1156                         SYS_pgrpsys_nsubcalls, shift_style);
1157                 break;
1158 #endif /* SYS_pgrpsys_subcall */
1159 #ifdef SYS_sigcall_subcall
1160         case SYS_sigcall:
1161                 decode_subcall(tcp, SYS_sigcall_subcall,
1162                         SYS_sigcall_nsubcalls, mask_style);
1163                 break;
1164 #endif /* SYS_sigcall_subcall */
1165         case SYS_msgsys:
1166                 decode_subcall(tcp, SYS_msgsys_subcall,
1167                         SYS_msgsys_nsubcalls, shift_style);
1168                 break;
1169         case SYS_shmsys:
1170                 decode_subcall(tcp, SYS_shmsys_subcall,
1171                         SYS_shmsys_nsubcalls, shift_style);
1172                 break;
1173         case SYS_semsys:
1174                 decode_subcall(tcp, SYS_semsys_subcall,
1175                         SYS_semsys_nsubcalls, shift_style);
1176                 break;
1177 #if 0 /* broken */
1178         case SYS_utssys:
1179                 decode_subcall(tcp, SYS_utssys_subcall,
1180                         SYS_utssys_nsubcalls, shift_style);
1181                 break;
1182 #endif
1183         case SYS_sysfs:
1184                 decode_subcall(tcp, SYS_sysfs_subcall,
1185                         SYS_sysfs_nsubcalls, shift_style);
1186                 break;
1187         case SYS_spcall:
1188                 decode_subcall(tcp, SYS_spcall_subcall,
1189                         SYS_spcall_nsubcalls, shift_style);
1190                 break;
1191 #ifdef SYS_context_subcall
1192         case SYS_context:
1193                 decode_subcall(tcp, SYS_context_subcall,
1194                         SYS_context_nsubcalls, shift_style);
1195                 break;
1196 #endif /* SYS_context_subcall */
1197 #endif /* SVR4 */
1198 #ifdef SUNOS4
1199         case SYS_semsys:
1200                 decode_subcall(tcp, SYS_semsys_subcall,
1201                         SYS_semsys_nsubcalls, shift_style);
1202                 break;
1203         case SYS_msgsys:
1204                 decode_subcall(tcp, SYS_msgsys_subcall,
1205                         SYS_msgsys_nsubcalls, shift_style);
1206                 break;
1207         case SYS_shmsys:
1208                 decode_subcall(tcp, SYS_shmsys_subcall,
1209                         SYS_shmsys_nsubcalls, shift_style);
1210                 break;
1211 #endif
1212         }
1213
1214         internal_syscall(tcp);
1215         if (!(qual_flags[tcp->scno] & QUAL_TRACE)) {
1216                 tcp->flags |= TCB_INSYSCALL;
1217                 return 0;
1218         }
1219
1220         if (cflag) {
1221                 gettimeofday(&tcp->etime, NULL);
1222                 tcp->flags |= TCB_INSYSCALL;
1223                 return 0;
1224         }
1225
1226         printleader(tcp);
1227         tcp->flags &= ~TCB_REPRINT;
1228         tcp_last = tcp;
1229         if (tcp->scno >= nsyscalls)
1230                 tprintf("syscall_%lu(", tcp->scno);
1231         else
1232                 tprintf("%s(", sysent[tcp->scno].sys_name);
1233         if (tcp->scno >= nsyscalls ||
1234             ((qual_flags[tcp->scno] & QUAL_RAW) && tcp->scno != SYS_exit))
1235                 sys_res = printargs(tcp);
1236         else
1237                 sys_res = (*sysent[tcp->scno].sys_func)(tcp);
1238         if (fflush(tcp->outf) == EOF)
1239                 return -1;
1240         tcp->flags |= TCB_INSYSCALL;
1241         /* Measure the entrance time as late as possible to avoid errors. */
1242         if (dtime)
1243                 gettimeofday(&tcp->etime, NULL);
1244         return sys_res;
1245 }
1246
1247 int
1248 printargs(tcp)
1249 struct tcb *tcp;
1250 {
1251         if (entering(tcp)) {
1252                 int i;
1253
1254                 for (i = 0; i < tcp->u_nargs; i++)
1255                         tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
1256         }
1257         return 0;
1258 }
1259
1260 long
1261 getrval2(tcp)
1262 struct tcb *tcp;
1263 {
1264         long val = -1;
1265
1266 #ifdef LINUX
1267 #ifdef SPARC
1268         struct pt_regs regs;
1269         if (ptrace(PTRACE_GETREGS,tcp->pid,(char *)&regs,0) < 0)
1270                 return -1;
1271         val = regs.u_regs[UREG_I1];
1272 #endif /* SPARC */
1273 #endif /* LINUX */
1274
1275 #ifdef SUNOS4
1276         if (upeek(tcp->pid, uoff(u_rval2), &val) < 0)
1277                 return -1;
1278 #endif /* SUNOS4 */
1279
1280 #ifdef SVR4
1281 #ifdef SPARC
1282         val = tcp->status.pr_reg[R_O1];
1283 #endif /* SPARC */
1284 #ifdef I386
1285         val = tcp->status.pr_reg[EDX];
1286 #endif /* I386 */
1287 #ifdef MIPS
1288         val = tcp->status.pr_reg[CTX_V1];
1289 #endif /* MIPS */
1290 #endif /* SVR4 */
1291
1292         return val;
1293 }
1294
1295 /*
1296  * Apparently, indirect system calls have already be converted by ptrace(2),
1297  * so if you see "indir" this program has gone astray.
1298  */
1299 int
1300 sys_indir(tcp)
1301 struct tcb *tcp;
1302 {
1303         int i, scno, nargs;
1304
1305         if (entering(tcp)) {
1306                 if ((scno = tcp->u_arg[0]) > nsyscalls) {
1307                         fprintf(stderr, "Bogus syscall: %u\n", scno);
1308                         return 0;
1309                 }
1310                 nargs = sysent[scno].nargs;
1311                 tprintf("%s", sysent[scno].sys_name);
1312                 for (i = 0; i < nargs; i++)
1313                         tprintf(", %#lx", tcp->u_arg[i+1]);
1314         }
1315         return 0;
1316 }
1317
1318 static int
1319 time_cmp(a, b)
1320 void *a;
1321 void *b;
1322 {
1323         return -tv_cmp(&tv_count[*((int *) a)], &tv_count[*((int *) b)]);
1324 }
1325
1326 static int
1327 syscall_cmp(a, b)
1328 void *a;
1329 void *b;
1330 {
1331         return strcmp(sysent[*((int *) a)].sys_name,
1332                 sysent[*((int *) b)].sys_name);
1333 }
1334
1335 static int
1336 count_cmp(a, b)
1337 void *a;
1338 void *b;
1339 {
1340         int m = call_count[*((int *) a)], n = call_count[*((int *) b)];
1341
1342         return (m < n) ? 1 : (m > n) ? -1 : 0;
1343 }
1344
1345 static int (*sortfun)();
1346 static struct timeval overhead = { -1, -1 };
1347
1348 void
1349 set_sortby(sortby)
1350 char *sortby;
1351 {
1352         if (strcmp(sortby, "time") == 0)
1353                 sortfun = time_cmp;
1354         else if (strcmp(sortby, "calls") == 0)
1355                 sortfun = count_cmp;
1356         else if (strcmp(sortby, "name") == 0)
1357                 sortfun = syscall_cmp;
1358         else if (strcmp(sortby, "nothing") == 0)
1359                 sortfun = NULL;
1360         else {
1361                 fprintf(stderr, "invalid sortby: `%s'\n", sortby);
1362                 exit(1);
1363         }
1364 }
1365
1366 void set_overhead(n)
1367 int n;
1368 {
1369         overhead.tv_sec = n / 1000000;
1370         overhead.tv_usec = n % 1000000;
1371 }
1372
1373 void
1374 call_summary(outf)
1375 FILE *outf;
1376 {
1377         int i, j;
1378         int call_cum, error_cum;
1379         struct timeval tv_cum, dtv;
1380         double percent;
1381         char *dashes = "-------------------------";
1382         char error_str[16];
1383
1384         call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0;
1385         if (overhead.tv_sec == -1) {
1386                 tv_mul(&overhead, &shortest, 8);
1387                 tv_div(&overhead, &overhead, 10);
1388         }
1389         for (i = 0; i < nsyscalls; i++) {
1390                 sorted_count[i] = i;
1391                 if (call_count[i] == 0)
1392                         continue;
1393                 tv_mul(&dtv, &overhead, call_count[i]);
1394                 tv_sub(&tv_count[i], &tv_count[i], &dtv);
1395                 call_cum += call_count[i];
1396                 error_cum += error_count[i];
1397                 tv_add(&tv_cum, &tv_cum, &tv_count[i]);
1398         }
1399         if (sortfun)
1400                 qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun);
1401         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n",
1402                 "% time", "seconds", "usecs/call",
1403                 "calls", "errors", "syscall");
1404         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
1405                 dashes, dashes, dashes, dashes, dashes, dashes);
1406         for (i = 0; i < nsyscalls; i++) {
1407                 j = sorted_count[i];
1408                 if (call_count[j] == 0)
1409                         continue;
1410                 tv_div(&dtv, &tv_count[j], call_count[j]);
1411                 if (error_count[j])
1412                         sprintf(error_str, "%d", error_count[j]);
1413                 else
1414                         error_str[0] = '\0';
1415                 percent = 100.0*tv_float(&tv_count[j])/tv_float(&tv_cum);
1416                 fprintf(outf, "%6.2f %4ld.%06ld %11ld %9d %9.9s %s\n",
1417                         percent, (long) tv_count[j].tv_sec,
1418                         (long) tv_count[j].tv_usec,
1419                         (long) 1000000 * dtv.tv_sec + dtv.tv_usec,
1420                         call_count[j], error_str, sysent[j].sys_name);
1421         }
1422         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
1423                 dashes, dashes, dashes, dashes, dashes, dashes);
1424         if (error_cum)
1425                 sprintf(error_str, "%d", error_cum);
1426         else
1427                 error_str[0] = '\0';
1428         fprintf(outf, "%6.6s %4ld.%06ld %11.11s %9d %9.9s %s\n",
1429                 "100.00", (long) tv_cum.tv_sec, (long) tv_cum.tv_usec, "",
1430                 call_cum, error_str, "total");
1431 }