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

   1 /*
   2  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
   3  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
   4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
   5  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
   6  * Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
   7  *                     Linux for s390 port by D.J. Barrow
   8  *                    <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  *      $Id$
  34  */
  35
  36 #include "defs.h"
  37
  38 #include <signal.h>
  39 #include <time.h>
  40 #include <errno.h>
  41 #include <sys/user.h>
  42 #include <sys/syscall.h>
  43 #include <sys/param.h>
  44
  45 #if HAVE_ASM_REG_H
  46 #ifdef SPARC
  47 #  define fpq kernel_fpq
  48 #  define fq kernel_fq
  49 #  define fpu kernel_fpu
  50 #endif
  51 #include <asm/reg.h>
  52 #ifdef SPARC
  53 #  undef fpq
  54 #  undef fq
  55 #  undef fpu
  56 #endif
  57 #endif
  58
  59 #ifdef HAVE_SYS_REG_H
  60 #include <sys/reg.h>
  61 #ifndef PTRACE_PEEKUSR
  62 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
  63 #endif
  64 #elif defined(HAVE_LINUX_PTRACE_H)
  65 #undef PTRACE_SYSCALL
  66 #include <linux/ptrace.h>
  67 #endif
  68
  69 #if defined(LINUX) && defined(IA64)
  70 # include <asm/ptrace_offsets.h>
  71 # include <asm/rse.h>
  72 #endif
  73
  74 #ifndef SYS_ERRLIST_DECLARED
  75 extern int sys_nerr;
  76 extern char *sys_errlist[];
  77 #endif /* SYS_ERRLIST_DECLARED */
  78
  79 #define NR_SYSCALL_BASE 0
  80 #ifdef LINUX
  81 #ifndef ERESTARTSYS
  82 #define ERESTARTSYS     512
  83 #endif
  84 #ifndef ERESTARTNOINTR
  85 #define ERESTARTNOINTR  513
  86 #endif
  87 #ifndef ERESTARTNOHAND
  88 #define ERESTARTNOHAND  514     /* restart if no handler.. */
  89 #endif
  90 #ifndef ENOIOCTLCMD
  91 #define ENOIOCTLCMD     515     /* No ioctl command */
  92 #endif
  93 #ifndef NSIG
  94 #define NSIG 32
  95 #endif
  96 #ifdef ARM
  97 #undef NSIG
  98 #define NSIG 32
  99 #undef NR_SYSCALL_BASE
 100 #define NR_SYSCALL_BASE __NR_SYSCALL_BASE
 101 #endif
 102 #endif /* LINUX */
 103
 104 #include "syscall.h"
 105
 106 /* Define these shorthand notations to simplify the syscallent files. */
 107 #define TF TRACE_FILE
 108 #define TI TRACE_IPC
 109 #define TN TRACE_NETWORK
 110 #define TP TRACE_PROCESS
 111 #define TS TRACE_SIGNAL
 112
 113 struct sysent sysent0[] = {
 114 #include "syscallent.h"
 115 };
 116 int nsyscalls0 = sizeof sysent0 / sizeof sysent0[0];
 117
 118 #if SUPPORTED_PERSONALITIES >= 2
 119 struct sysent sysent1[] = {
 120 #include "syscallent1.h"
 121 };
 122 int nsyscalls1 = sizeof sysent1 / sizeof sysent1[0];
 123 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 124
 125 #if SUPPORTED_PERSONALITIES >= 3
 126 struct sysent sysent2[] = {
 127 #include "syscallent2.h"
 128 };
 129 int nsyscalls2 = sizeof sysent2 / sizeof sysent2[0];
 130 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 131
 132 struct sysent *sysent;
 133 int nsyscalls;
 134
 135 /* Now undef them since short defines cause wicked namespace pollution. */
 136 #undef TF
 137 #undef TI
 138 #undef TN
 139 #undef TP
 140 #undef TS
 141
 142 char *errnoent0[] = {
 143 #include "errnoent.h"
 144 };
 145 int nerrnos0 = sizeof errnoent0 / sizeof errnoent0[0];
 146
 147 #if SUPPORTED_PERSONALITIES >= 2
 148 char *errnoent1[] = {
 149 #include "errnoent1.h"
 150 };
 151 int nerrnos1 = sizeof errnoent1 / sizeof errnoent1[0];
 152 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 153
 154 #if SUPPORTED_PERSONALITIES >= 3
 155 char *errnoent2[] = {
 156 #include "errnoent2.h"
 157 };
 158 int nerrnos2 = sizeof errnoent2 / sizeof errnoent2[0];
 159 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 160
 161 char **errnoent;
 162 int nerrnos;
 163
 164 int current_personality;
 165
 166 int
 167 set_personality(personality)
 168 int personality;
 169 {
 170         switch (personality) {
 171         case 0:
 172                 errnoent = errnoent0;
 173                 nerrnos = nerrnos0;
 174                 sysent = sysent0;
 175                 nsyscalls = nsyscalls0;
 176                 ioctlent = ioctlent0;
 177                 nioctlents = nioctlents0;
 178                 signalent = signalent0;
 179                 nsignals = nsignals0;
 180                 break;
 181
 182 #if SUPPORTED_PERSONALITIES >= 2
 183         case 1:
 184                 errnoent = errnoent1;
 185                 nerrnos = nerrnos1;
 186                 sysent = sysent1;
 187                 nsyscalls = nsyscalls1;
 188                 ioctlent = ioctlent1;
 189                 nioctlents = nioctlents1;
 190                 signalent = signalent1;
 191                 nsignals = nsignals1;
 192                 break;
 193 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 194
 195 #if SUPPORTED_PERSONALITIES >= 3
 196         case 2:
 197                 errnoent = errnoent2;
 198                 nerrnos = nerrnos2;
 199                 sysent = sysent2;
 200                 nsyscalls = nsyscalls2;
 201                 ioctlent = ioctlent2;
 202                 nioctlents = nioctlents2;
 203                 signalent = signalent2;
 204                 nsignals = nsignals2;
 205                 break;
 206 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 207
 208         default:
 209                 return -1;
 210         }
 211
 212         current_personality = personality;
 213         return 0;
 214 }
 215
 216 int qual_flags[MAX_QUALS];
 217
 218 static int call_count[MAX_QUALS];
 219 static int error_count[MAX_QUALS];
 220 static struct timeval tv_count[MAX_QUALS];
 221 static int sorted_count[MAX_QUALS];
 222
 223 static struct timeval shortest = { 1000000, 0 };
 224
 225 static int lookup_syscall(), lookup_signal(), lookup_fault(), lookup_desc();
 226
 227 static struct qual_options {
 228         int bitflag;
 229         char *option_name;
 230         int (*lookup)();
 231         char *argument_name;
 232 } qual_options[] = {
 233         { QUAL_TRACE,   "trace",        lookup_syscall, "system call"   },
 234         { QUAL_TRACE,   "t",            lookup_syscall, "system call"   },
 235         { QUAL_ABBREV,  "abbrev",       lookup_syscall, "system call"   },
 236         { QUAL_ABBREV,  "a",            lookup_syscall, "system call"   },
 237         { QUAL_VERBOSE, "verbose",      lookup_syscall, "system call"   },
 238         { QUAL_VERBOSE, "v",            lookup_syscall, "system call"   },
 239         { QUAL_RAW,     "raw",          lookup_syscall, "system call"   },
 240         { QUAL_RAW,     "x",            lookup_syscall, "system call"   },
 241         { QUAL_SIGNAL,  "signal",       lookup_signal,  "signal"        },
 242         { QUAL_SIGNAL,  "signals",      lookup_signal,  "signal"        },
 243         { QUAL_SIGNAL,  "s",            lookup_signal,  "signal"        },
 244         { QUAL_FAULT,   "fault",        lookup_fault,   "fault"         },
 245         { QUAL_FAULT,   "faults",       lookup_fault,   "fault"         },
 246         { QUAL_FAULT,   "m",            lookup_fault,   "fault"         },
 247         { QUAL_READ,    "read",         lookup_desc,    "descriptor"    },
 248         { QUAL_READ,    "reads",        lookup_desc,    "descriptor"    },
 249         { QUAL_READ,    "r",            lookup_desc,    "descriptor"    },
 250         { QUAL_WRITE,   "write",        lookup_desc,    "descriptor"    },
 251         { QUAL_WRITE,   "writes",       lookup_desc,    "descriptor"    },
 252         { QUAL_WRITE,   "w",            lookup_desc,    "descriptor"    },
 253         { 0,            NULL,           NULL,           NULL            },
 254 };
 255
 256 static int
 257 lookup_syscall(s)
 258 char *s;
 259 {
 260         int i;
 261
 262         for (i = 0; i < nsyscalls; i++) {
 263                 if (strcmp(s, sysent[i].sys_name) == 0)
 264                         return i;
 265         }
 266         return -1;
 267 }
 268
 269 static int
 270 lookup_signal(s)
 271 char *s;
 272 {
 273         int i;
 274         char buf[32];
 275
 276         if (s && *s && isdigit((unsigned char)*s))
 277                 return atoi(s);
 278         strcpy(buf, s);
 279         s = buf;
 280         for (i = 0; s[i]; i++)
 281                 s[i] = toupper((unsigned char)(s[i]));
 282         if (strncmp(s, "SIG", 3) == 0)
 283                 s += 3;
 284         for (i = 0; i <= NSIG; i++) {
 285                 if (strcmp(s, signame(i) + 3) == 0)
 286                         return i;
 287         }
 288         return -1;
 289 }
 290
 291 static int
 292 lookup_fault(s)
 293 char *s;
 294 {
 295         return -1;
 296 }
 297
 298 static int
 299 lookup_desc(s)
 300 char *s;
 301 {
 302         if (s && *s && isdigit((unsigned char)*s))
 303                 return atoi(s);
 304         return -1;
 305 }
 306
 307 static int
 308 lookup_class(s)
 309 char *s;
 310 {
 311         if (strcmp(s, "file") == 0)
 312                 return TRACE_FILE;
 313         if (strcmp(s, "ipc") == 0)
 314                 return TRACE_IPC;
 315         if (strcmp(s, "network") == 0)
 316                 return TRACE_NETWORK;
 317         if (strcmp(s, "process") == 0)
 318                 return TRACE_PROCESS;
 319         if (strcmp(s, "signal") == 0)
 320                 return TRACE_SIGNAL;
 321         return -1;
 322 }
 323
 324 void
 325 qualify(s)
 326 char *s;
 327 {
 328         struct qual_options *opt;
 329         int not;
 330         char *p;
 331         int i, n;
 332
 333         opt = &qual_options[0];
 334         for (i = 0; (p = qual_options[i].option_name); i++) {
 335                 n = strlen(p);
 336                 if (strncmp(s, p, n) == 0 && s[n] == '=') {
 337                         opt = &qual_options[i];
 338                         s += n + 1;
 339                         break;
 340                 }
 341         }
 342         not = 0;
 343         if (*s == '!') {
 344                 not = 1;
 345                 s++;
 346         }
 347         if (strcmp(s, "none") == 0) {
 348                 not = 1 - not;
 349                 s = "all";
 350         }
 351         if (strcmp(s, "all") == 0) {
 352                 for (i = 0; i < MAX_QUALS; i++) {
 353                         if (not)
 354                                 qual_flags[i] &= ~opt->bitflag;
 355                         else
 356                                 qual_flags[i] |= opt->bitflag;
 357                 }
 358                 return;
 359         }
 360         for (i = 0; i < MAX_QUALS; i++) {
 361                 if (not)
 362                         qual_flags[i] |= opt->bitflag;
 363                 else
 364                         qual_flags[i] &= ~opt->bitflag;
 365         }
 366         for (p = strtok(s, ","); p; p = strtok(NULL, ",")) {
 367                 if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
 368                         for (i = 0; i < MAX_QUALS; i++) {
 369                                 if (sysent[i].sys_flags & n) {
 370                                         if (not)
 371                                                 qual_flags[i] &= ~opt->bitflag;
 372                                         else
 373                                                 qual_flags[i] |= opt->bitflag;
 374                                 }
 375                         }
 376                         continue;
 377                 }
 378                 if ((n = (*opt->lookup)(p)) < 0) {
 379                         fprintf(stderr, "strace: invalid %s `%s'\n",
 380                                 opt->argument_name, p);
 381                         exit(1);
 382                 }
 383                 if (not)
 384                         qual_flags[n] &= ~opt->bitflag;
 385                 else
 386                         qual_flags[n] |= opt->bitflag;
 387         }
 388         return;
 389 }
 390
 391 static void
 392 dumpio(tcp)
 393 struct tcb *tcp;
 394 {
 395         if (syserror(tcp))
 396                 return;
 397         if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= MAX_QUALS)
 398                 return;
 399         switch (tcp->scno + NR_SYSCALL_BASE) {
 400         case SYS_read:
 401 #ifdef SYS_recv
 402         case SYS_recv:
 403 #endif
 404 #ifdef SYS_recvfrom
 405         case SYS_recvfrom:
 406 #endif
 407                 if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
 408                         dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
 409                 break;
 410         case SYS_write:
 411 #ifdef SYS_send
 412         case SYS_send:
 413 #endif
 414 #ifdef SYS_sendto
 415         case SYS_sendto:
 416 #endif
 417                 if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
 418                         dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 419                 break;
 420 #ifdef SYS_readv
 421         case SYS_readv:
 422                 if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
 423                         dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
 424                 break;
 425 #endif
 426 #ifdef SYS_writev
 427         case SYS_writev:
 428
 429                 if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
 430                         dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
 431                 break;
 432 #endif
 433         }
 434 }
 435
 436 #ifndef FREEBSD
 437 enum subcall_style { shift_style, deref_style, mask_style, door_style };
 438 #else /* FREEBSD */
 439 enum subcall_style { shift_style, deref_style, mask_style, door_style, table_style };
 440
 441 struct subcall {
 442   int call;
 443   int nsubcalls;
 444   int subcalls[5];
 445 };
 446
 447 const struct subcall subcalls_table[] = {
 448   { SYS_shmsys, 5, { SYS_shmat, SYS_shmctl, SYS_shmdt, SYS_shmget, SYS_shmctl } },
 449 #ifdef SYS_semconfig
 450   { SYS_semsys, 4, { SYS___semctl, SYS_semget, SYS_semop, SYS_semconfig } },
 451 #else
 452   { SYS_semsys, 3, { SYS___semctl, SYS_semget, SYS_semop } },
 453 #endif
 454   { SYS_msgsys, 4, { SYS_msgctl, SYS_msgget, SYS_msgsnd, SYS_msgrcv } },
 455 };
 456 #endif /* FREEBSD */
 457
 458 #if !(defined(LINUX) && ( defined(ALPHA) || defined(MIPS) ))
 459
 460 const int socket_map [] = {
 461                /* SYS_SOCKET      */ 97,
 462                /* SYS_BIND        */ 104,
 463                /* SYS_CONNECT     */ 98,
 464                /* SYS_LISTEN      */ 106,
 465                /* SYS_ACCEPT      */ 99,
 466                /* SYS_GETSOCKNAME */ 150,
 467                /* SYS_GETPEERNAME */ 141,
 468                /* SYS_SOCKETPAIR  */ 135,
 469                /* SYS_SEND        */ 101,
 470                /* SYS_RECV        */ 102,
 471                /* SYS_SENDTO      */ 133,
 472                /* SYS_RECVFROM    */ 125,
 473                /* SYS_SHUTDOWN    */ 134,
 474                /* SYS_SETSOCKOPT  */ 105,
 475                /* SYS_GETSOCKOPT  */ 118,
 476                /* SYS_SENDMSG     */ 114,
 477                /* SYS_RECVMSG     */ 113
 478 };
 479
 480 void
 481 sparc_socket_decode (tcp)
 482 struct tcb *tcp;
 483 {
 484         volatile long addr;
 485         volatile int i, n;
 486
 487         if (tcp->u_arg [0] < 1 || tcp->u_arg [0] > sizeof(socket_map)/sizeof(int)+1){
 488                 return;
 489         }
 490         tcp->scno = socket_map [tcp->u_arg [0]-1];
 491         n = tcp->u_nargs = sysent [tcp->scno].nargs;
 492         addr = tcp->u_arg [1];
 493         for (i = 0; i < n; i++){
 494                 int arg;
 495                 if (umoven (tcp, addr, sizeof (arg), (void *) &arg) < 0)
 496                         arg = 0;
 497                 tcp->u_arg [i] = arg;
 498                 addr += sizeof (arg);
 499         }
 500 }
 501
 502 static void
 503 decode_subcall(tcp, subcall, nsubcalls, style)
 504 struct tcb *tcp;
 505 int subcall;
 506 int nsubcalls;
 507 enum subcall_style style;
 508 {
 509         int i, addr, mask, arg;
 510
 511         switch (style) {
 512         case shift_style:
 513                 if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
 514                         return;
 515                 tcp->scno = subcall + tcp->u_arg[0];
 516                 if (sysent[tcp->scno].nargs != -1)
 517                         tcp->u_nargs = sysent[tcp->scno].nargs;
 518                 else
 519                         tcp->u_nargs--;
 520                 for (i = 0; i < tcp->u_nargs; i++)
 521                         tcp->u_arg[i] = tcp->u_arg[i + 1];
 522                 break;
 523         case deref_style:
 524                 if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
 525                         return;
 526                 tcp->scno = subcall + tcp->u_arg[0];
 527                 addr = tcp->u_arg[1];
 528                 for (i = 0; i < sysent[tcp->scno].nargs; i++) {
 529                         if (umove(tcp, addr, &arg) < 0)
 530                                 arg = 0;
 531                         tcp->u_arg[i] = arg;
 532                         addr += sizeof(arg);
 533                 }
 534                 tcp->u_nargs = sysent[tcp->scno].nargs;
 535                 break;
 536         case mask_style:
 537                 mask = (tcp->u_arg[0] >> 8) & 0xff;
 538                 for (i = 0; mask; i++)
 539                         mask >>= 1;
 540                 if (i >= nsubcalls)
 541                         return;
 542                 tcp->u_arg[0] &= 0xff;
 543                 tcp->scno = subcall + i;
 544                 if (sysent[tcp->scno].nargs != -1)
 545                         tcp->u_nargs = sysent[tcp->scno].nargs;
 546                 break;
 547         case door_style:
 548                 /*
 549                  * Oh, yuck.  The call code is the *sixth* argument.
 550                  * (don't you mean the *last* argument? - JH)
 551                  */
 552                 if (tcp->u_arg[5] < 0 || tcp->u_arg[5] >= nsubcalls)
 553                         return;
 554                 tcp->scno = subcall + tcp->u_arg[5];
 555                 if (sysent[tcp->scno].nargs != -1)
 556                         tcp->u_nargs = sysent[tcp->scno].nargs;
 557                 else
 558                         tcp->u_nargs--;
 559                 break;
 560 #ifdef FREEBSD
 561         case table_style:
 562                 for (i = 0; i < sizeof(subcalls_table) / sizeof(struct subcall); i++)
 563                         if (subcalls_table[i].call == tcp->scno) break;
 564                 if (i < sizeof(subcalls_table) / sizeof(struct subcall) &&
 565                     tcp->u_arg[0] >= 0 && tcp->u_arg[0] < subcalls_table[i].nsubcalls) {
 566                         tcp->scno = subcalls_table[i].subcalls[tcp->u_arg[0]];
 567                         for (i = 0; i < tcp->u_nargs; i++)
 568                                 tcp->u_arg[i] = tcp->u_arg[i + 1];
 569                 }
 570                 break;
 571 #endif /* FREEBSD */
 572         }
 573 }
 574 #endif
 575
 576 struct tcb *tcp_last = NULL;
 577
 578 static int
 579 internal_syscall(tcp)
 580 struct tcb *tcp;
 581 {
 582         /*
 583          * We must always trace a few critical system calls in order to
 584          * correctly support following forks in the presence of tracing
 585          * qualifiers.
 586          */
 587         switch (tcp->scno + NR_SYSCALL_BASE) {
 588 #ifdef SYS_fork
 589         case SYS_fork:
 590 #endif
 591 #ifdef SYS_vfork
 592         case SYS_vfork:
 593 #endif
 594 #ifdef SYS_fork1
 595         case SYS_fork1:
 596 #endif
 597 #ifdef SYS_forkall
 598         case SYS_forkall:
 599 #endif
 600 #ifdef SYS_rfork1
 601         case SYS_rfork1:
 602 #endif
 603 #ifdef SYS_rforkall
 604         case SYS_rforkall:
 605 #endif
 606                 internal_fork(tcp);
 607                 break;
 608 #ifdef SYS_clone
 609         case SYS_clone:
 610                 internal_clone(tcp);
 611                 break;
 612 #endif
 613 #ifdef SYS_clone2
 614         case SYS_clone2:
 615                 internal_clone(tcp);
 616                 break;
 617 #endif
 618 #ifdef SYS_execv
 619         case SYS_execv:
 620 #endif
 621 #ifdef SYS_execve
 622         case SYS_execve:
 623 #endif
 624 #ifdef SYS_rexecve
 625         case SYS_rexecve:
 626 #endif
 627                 internal_exec(tcp);
 628                 break;
 629
 630 #ifdef SYS_wait
 631         case SYS_wait:
 632 #endif
 633 #ifdef SYS_wait4
 634         case SYS_wait4:
 635 #endif
 636 #ifdef SYS32_wait4
 637         case SYS32_wait4:
 638 #endif
 639 #ifdef SYS_waitpid
 640         case SYS_waitpid:
 641 #endif
 642 #ifdef SYS_waitsys
 643         case SYS_waitsys:
 644 #endif
 645                 internal_wait(tcp);
 646                 break;
 647
 648 #ifdef SYS_exit
 649         case SYS_exit:
 650 #endif
 651 #ifdef SYS32_exit
 652         case SYS32_exit:
 653 #endif
 654                 internal_exit(tcp);
 655                 break;
 656         }
 657         return 0;
 658 }
 659
 660
 661 #ifdef LINUX
 662 #if defined (I386)
 663         static long eax;
 664 #elif defined (IA64)
 665         long r8, r10, psr;
 666         long ia32 = 0;
 667 #elif defined (POWERPC)
 668         static long result,flags;
 669 #elif defined (M68K)
 670         static int d0;
 671 #elif defined (ARM)
 672         static int r0;
 673 #elif defined (ALPHA)
 674         static long r0;
 675         static long a3;
 676 #elif defined (SPARC)
 677         static struct regs regs;
 678         static unsigned long trap;
 679 #elif defined(MIPS)
 680         static long a3;
 681         static long r2;
 682 #elif defined(S390)
 683         static long gpr2;
 684         static long pc;
 685 #elif defined(HPPA)
 686         static long r28;
 687 #endif
 688 #endif /* LINUX */
 689 #ifdef FREEBSD
 690         struct reg regs;
 691 #endif /* FREEBSD */
 692
 693 int
 694 get_scno(tcp)
 695 struct tcb *tcp;
 696 {
 697         long scno = 0;
 698 #ifndef USE_PROCFS
 699         int pid = tcp->pid;
 700 #endif /* !PROCFS */
 701
 702 #ifdef LINUX
 703 #if defined(S390)
 704         if (upeek(tcp->pid,PT_PSWADDR,&pc) < 0)
 705                 return -1;
 706         scno = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)(pc-4),0);
 707         if (errno)
 708                 return -1;
 709         scno&=0xFF;
 710 #elif defined (POWERPC)
 711         if (upeek(pid, 4*PT_R0, &scno) < 0)
 712                 return -1;
 713         if (!(tcp->flags & TCB_INSYSCALL)) {
 714                 /* Check if we return from execve. */
 715                 if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) {
 716                         tcp->flags &= ~TCB_WAITEXECVE;
 717                         return 0;
 718                 }
 719         }
 720 #elif defined (I386)
 721         if (upeek(pid, 4*ORIG_EAX, &scno) < 0)
 722                 return -1;
 723 #elif defined(IA64)
 724 #       define IA64_PSR_IS      ((long)1 << 34)
 725         if (upeek (pid, PT_CR_IPSR, &psr) >= 0)
 726                 ia32 = (psr & IA64_PSR_IS) != 0;
 727         if (!(tcp->flags & TCB_INSYSCALL)) {
 728                 if (ia32) {
 729                         if (upeek(pid, PT_R1, &scno) < 0)       /* orig eax */
 730                                 return -1;
 731                         /* Check if we return from execve. */
 732                 } else {
 733                         if (upeek (pid, PT_R15, &scno) < 0)
 734                                 return -1;
 735                 }
 736         } else {
 737                 /* syscall in progress */
 738                 if (upeek (pid, PT_R8, &r8) < 0)
 739                         return -1;
 740                 if (upeek (pid, PT_R10, &r10) < 0)
 741                         return -1;
 742         }
 743         if (tcp->flags & TCB_WAITEXECVE) {
 744                 tcp->flags &= ~TCB_WAITEXECVE;
 745                 return 0;
 746         }
 747
 748 #elif defined (ARM)
 749         {
 750             long pc;
 751             upeek(pid, 4*15, &pc);
 752             umoven(tcp, pc-4, 4, (char *)&scno);
 753             scno &= 0x000fffff;
 754         }
 755 #elif defined (M68K)
 756         if (upeek(pid, 4*PT_ORIG_D0, &scno) < 0)
 757                 return -1;
 758 #elif defined (MIPS)
 759         if (upeek(pid, REG_A3, &a3) < 0)
 760                 return -1;
 761
 762         if(!(tcp->flags & TCB_INSYSCALL)) {
 763                 if (upeek(pid, REG_V0, &scno) < 0)
 764                         return -1;
 765
 766                 if (scno < 0 || scno > nsyscalls) {
 767                         if(a3 == 0 || a3 == -1) {
 768                                 if(debug)
 769                                         fprintf (stderr, "stray syscall exit: v0 = %ld\n", scno);
 770                                 return 0;
 771                         }
 772                 }
 773         } else {
 774                 if (upeek(pid, REG_V0, &r2) < 0)
 775                         return -1;
 776         }
 777 #elif defined (ALPHA)
 778         if (upeek(pid, REG_A3, &a3) < 0)
 779                 return -1;
 780
 781         if (!(tcp->flags & TCB_INSYSCALL)) {
 782                 if (upeek(pid, REG_R0, &scno) < 0)
 783                         return -1;
 784
 785                 /* Check if we return from execve. */
 786                 if (scno == 0 && tcp->flags & TCB_WAITEXECVE) {
 787                         tcp->flags &= ~TCB_WAITEXECVE;
 788                         return 0;
 789                 }
 790
 791                 /*
 792                  * Do some sanity checks to figure out if it's
 793                  * really a syscall entry
 794                  */
 795                 if (scno < 0 || scno > nsyscalls) {
 796                         if (a3 == 0 || a3 == -1) {
 797                                 if (debug)
 798                                         fprintf (stderr, "stray syscall exit: r0 = %ld\n", scno);
 799                                 return 0;
 800                         }
 801                 }
 802         }
 803         else {
 804                 if (upeek(pid, REG_R0, &r0) < 0)
 805                         return -1;
 806         }
 807 #elif defined (SPARC)
 808         /* Everything we need is in the current register set. */
 809         if (ptrace(PTRACE_GETREGS,pid,(char *)&regs,0) < 0)
 810                 return -1;
 811
 812         /* If we are entering, then disassemble the syscall trap. */
 813         if (!(tcp->flags & TCB_INSYSCALL)) {
 814                 /* Retrieve the syscall trap instruction. */
 815                 errno = 0;
 816                 trap = ptrace(PTRACE_PEEKTEXT,pid,(char *)regs.r_pc,0);
 817                 if (errno)
 818                         return -1;
 819
 820                 /* Disassemble the trap to see what personality to use. */
 821                 switch (trap) {
 822                 case 0x91d02010:
 823                         /* Linux/SPARC syscall trap. */
 824                         set_personality(0);
 825                         break;
 826                 case 0x91d0206d:
 827                         /* Linux/SPARC64 syscall trap. */
 828                         fprintf(stderr,"syscall: Linux/SPARC64 not supported yet\n");
 829                         return -1;
 830                 case 0x91d02000:
 831                         /* SunOS syscall trap. (pers 1) */
 832                         fprintf(stderr,"syscall: SunOS no support\n");
 833                         return -1;
 834                 case 0x91d02008:
 835                         /* Solaris 2.x syscall trap. (per 2) */
 836                         set_personality(1);
 837                         break;
 838                 case 0x91d02009:
 839                         /* NetBSD/FreeBSD syscall trap. */
 840                         fprintf(stderr,"syscall: NetBSD/FreeBSD not supported\n");
 841                         return -1;
 842                 case 0x91d02027:
 843                         /* Solaris 2.x gettimeofday */
 844                         set_personality(1);
 845                         break;
 846                 default:
 847                         /* Unknown syscall trap. */
 848                         if(tcp->flags & TCB_WAITEXECVE) {
 849                                 tcp->flags &= ~TCB_WAITEXECVE;
 850                                 return 0;
 851                         }
 852                         fprintf(stderr,"syscall: unknown syscall trap %08x %08x\n", trap, regs.r_pc);
 853                         return -1;
 854                 }
 855
 856                 /* Extract the system call number from the registers. */
 857                 if (trap == 0x91d02027)
 858                         scno = 156;
 859                 else
 860                         scno = regs.r_g1;
 861                 if (scno == 0) {
 862                         scno = regs.r_o0;
 863                         memmove (&regs.r_o0, &regs.r_o1, 7*sizeof(regs.r_o0));
 864                 }
 865         }
 866 #elif defined(HPPA)
 867         if (upeek(pid, PT_GR20, &scno) < 0)
 868                 return -1;
 869         if (!(tcp->flags & TCB_INSYSCALL)) {
 870                 /* Check if we return from execve. */
 871                 if ((tcp->flags & TCB_WAITEXECVE)) {
 872                         tcp->flags &= ~TCB_WAITEXECVE;
 873                         return 0;
 874                 }
 875         }
 876 #endif
 877 #endif /* LINUX */
 878 #ifdef SUNOS4
 879         if (upeek(pid, uoff(u_arg[7]), &scno) < 0)
 880                 return -1;
 881 #endif
 882 #ifdef USE_PROCFS
 883 #ifdef HAVE_PR_SYSCALL
 884         scno = tcp->status.PR_SYSCALL;
 885 #else /* !HAVE_PR_SYSCALL */
 886 #ifndef FREEBSD
 887         scno = tcp->status.PR_WHAT;
 888 #else /* FREEBSD */
 889         if (pread(tcp->pfd_reg, &regs, sizeof(regs), 0) < 0) {
 890                 perror("pread");
 891                 return -1;
 892         }
 893         switch (regs.r_eax) {
 894         case SYS_syscall:
 895         case SYS___syscall:
 896                 pread(tcp->pfd, &scno, sizeof(scno), regs.r_esp + sizeof(int));
 897                 break;
 898         default:
 899                 scno = regs.r_eax;
 900                 break;
 901         }
 902 #endif /* FREEBSD */
 903 #endif /* !HAVE_PR_SYSCALL */
 904 #endif /* USE_PROCFS */
 905         if (!(tcp->flags & TCB_INSYSCALL))
 906                 tcp->scno = scno;
 907         return 1;
 908 }
 909
 910
 911 int
 912 syscall_fixup(tcp)
 913 struct tcb *tcp;
 914 {
 915 #ifndef USE_PROCFS
 916         int pid = tcp->pid;
 917 #else /* USE_PROCFS */
 918         int scno = tcp->scno;
 919
 920         if (!(tcp->flags & TCB_INSYSCALL)) {
 921                 if (tcp->status.PR_WHY != PR_SYSENTRY) {
 922                         if (
 923                             scno == SYS_fork
 924 #ifdef SYS_vfork
 925                             || scno == SYS_vfork
 926 #endif /* SYS_vfork */
 927 #ifdef SYS_fork1
 928                             || scno == SYS_fork1
 929 #endif /* SYS_fork1 */
 930 #ifdef SYS_forkall
 931                             || scno == SYS_forkall
 932 #endif /* SYS_forkall */
 933 #ifdef SYS_rfork1
 934                             || scno == SYS_rfork1
 935 #endif /* SYS_fork1 */
 936 #ifdef SYS_rforkall
 937                             || scno == SYS_rforkall
 938 #endif /* SYS_rforkall */
 939                             ) {
 940                                 /* We are returning in the child, fake it. */
 941                                 tcp->status.PR_WHY = PR_SYSENTRY;
 942                                 trace_syscall(tcp);
 943                                 tcp->status.PR_WHY = PR_SYSEXIT;
 944                         }
 945                         else {
 946                                 fprintf(stderr, "syscall: missing entry\n");
 947                                 tcp->flags |= TCB_INSYSCALL;
 948                         }
 949                 }
 950         }
 951         else {
 952                 if (tcp->status.PR_WHY != PR_SYSEXIT) {
 953                         fprintf(stderr, "syscall: missing exit\n");
 954                         tcp->flags &= ~TCB_INSYSCALL;
 955                 }
 956         }
 957 #endif /* USE_PROCFS */
 958 #ifdef SUNOS4
 959         if (!(tcp->flags & TCB_INSYSCALL)) {
 960                 if (scno == 0) {
 961                         fprintf(stderr, "syscall: missing entry\n");
 962                         tcp->flags |= TCB_INSYSCALL;
 963                 }
 964         }
 965         else {
 966                 if (scno != 0) {
 967                         if (debug) {
 968                                 /*
 969                                  * This happens when a signal handler
 970                                  * for a signal which interrupted a
 971                                  * a system call makes another system call.
 972                                  */
 973                                 fprintf(stderr, "syscall: missing exit\n");
 974                         }
 975                         tcp->flags &= ~TCB_INSYSCALL;
 976                 }
 977         }
 978 #endif /* SUNOS4 */
 979 #ifdef LINUX
 980 #if defined (I386)
 981         if (upeek(pid, 4*EAX, &eax) < 0)
 982                 return -1;
 983         if (eax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 984                 if (debug)
 985                         fprintf(stderr, "stray syscall exit: eax = %ld\n", eax);
 986                 return 0;
 987         }
 988 #elif defined (S390)
 989         if (upeek(pid, PT_GPR2, &gpr2) < 0)
 990                 return -1;
 991         if (gpr2 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
 992                 if (debug)
 993                         fprintf(stderr, "stray syscall exit: gpr2 = %ld\n", gpr2);
 994                 return 0;
 995         }
 996 #elif defined (POWERPC)
 997 # define SO_MASK 0x10000000
 998         if (upeek(pid, 4*PT_CCR, &flags) < 0)
 999                 return -1;
1000         if (upeek(pid, 4*PT_R3, &result) < 0)
1001                 return -1;
1002         if (flags & SO_MASK)
1003                 result = -result;
1004 #elif defined (M68K)
1005         if (upeek(pid, 4*PT_D0, &d0) < 0)
1006                 return -1;
1007         if (d0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
1008                 if (debug)
1009                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", d0);
1010                 return 0;
1011         }
1012 #elif defined (ARM)
1013         if (upeek(pid, 4*0, (long *)&r0) < 0)
1014                 return -1;
1015         if ( 0 && r0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
1016                 if (debug)
1017                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", r0);
1018                 return 0;
1019         }
1020 #elif defined (HPPA)
1021         if (upeek(pid, PT_GR28, &r28) < 0)
1022                 return -1;
1023 #elif defined(IA64)
1024         if (upeek(pid, PT_R10, &r10) < 0)
1025                 return -1;
1026         if (upeek(pid, PT_R8, &r8) < 0)
1027                 return -1;
1028         if (ia32 && r8 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
1029                 if (debug)
1030                         fprintf(stderr, "stray syscall exit: r8 = %ld\n", r8);
1031                 return 0;
1032         }
1033 #endif
1034 #endif /* LINUX */
1035         return 1;
1036 }
1037
1038 int
1039 get_error(tcp)
1040 struct tcb *tcp;
1041 {
1042         int u_error = 0;
1043 #ifdef LINUX
1044 #ifdef S390
1045                 if (gpr2 && (unsigned) -gpr2 < nerrnos) {
1046                         tcp->u_rval = -1;
1047                         u_error = -gpr2;
1048                 }
1049                 else {
1050                         tcp->u_rval = gpr2;
1051                         u_error = 0;
1052                 }
1053 #else /* !S390 */
1054 #ifdef I386
1055                 if (eax < 0 && -eax < nerrnos) {
1056                         tcp->u_rval = -1;
1057                         u_error = -eax;
1058                 }
1059                 else {
1060                         tcp->u_rval = eax;
1061                         u_error = 0;
1062                 }
1063 #else /* !I386 */
1064 #ifdef IA64
1065                 if (ia32) {
1066                         int err;
1067
1068                         err = (int)r8;
1069                         if (err < 0 && -err < nerrnos) {
1070                                 tcp->u_rval = -1;
1071                                 u_error = -err;
1072                         }
1073                         else {
1074                                 tcp->u_rval = err;
1075                                 u_error = 0;
1076                         }
1077                 } else {
1078                         if (r10) {
1079                                 tcp->u_rval = -1;
1080                                 u_error = r8;
1081                         } else {
1082                                 tcp->u_rval = r8;
1083                                 u_error = 0;
1084                         }
1085                 }
1086 #else /* !IA64 */
1087 #ifdef MIPS
1088                 if (a3) {
1089                         tcp->u_rval = -1;
1090                         u_error = r2;
1091                 } else {
1092                         tcp->u_rval = r2;
1093                         u_error = 0;
1094                 }
1095 #else
1096 #ifdef POWERPC
1097                 if (result && (unsigned) -result < nerrnos) {
1098                         tcp->u_rval = -1;
1099                         u_error = -result;
1100                 }
1101                 else {
1102                         tcp->u_rval = result;
1103                         u_error = 0;
1104                 }
1105 #else /* !POWERPC */
1106 #ifdef M68K
1107                 if (d0 && (unsigned) -d0 < nerrnos) {
1108                         tcp->u_rval = -1;
1109                         u_error = -d0;
1110                 }
1111                 else {
1112                         tcp->u_rval = d0;
1113                         u_error = 0;
1114                 }
1115 #else /* !M68K */
1116 #ifdef ARM
1117                 if (r0 && (unsigned) -r0 < nerrnos) {
1118                         tcp->u_rval = -1;
1119                         u_error = -r0;
1120                 }
1121                 else {
1122                         tcp->u_rval = r0;
1123                         u_error = 0;
1124                 }
1125 #else /* !ARM */
1126 #ifdef ALPHA
1127                 if (a3) {
1128                         tcp->u_rval = -1;
1129                         u_error = r0;
1130                 }
1131                 else {
1132                         tcp->u_rval = r0;
1133                         u_error = 0;
1134                 }
1135 #else /* !ALPHA */
1136 #ifdef SPARC
1137                 if (regs.r_psr & PSR_C) {
1138                         tcp->u_rval = -1;
1139                         u_error = regs.r_o0;
1140                 }
1141                 else {
1142                         tcp->u_rval = regs.r_o0;
1143                         u_error = 0;
1144                 }
1145 #else /* !SPARC */
1146 #ifdef HPPA
1147                 if (r28 && (unsigned) -r28 < nerrnos) {
1148                         tcp->u_rval = -1;
1149                         u_error = -r28;
1150                 }
1151                 else {
1152                         tcp->u_rval = r28;
1153                         u_error = 0;
1154                 }
1155 #endif /* HPPA */
1156 #endif /* SPARC */
1157 #endif /* ALPHA */
1158 #endif /* ARM */
1159 #endif /* M68K */
1160 #endif /* POWERPC */
1161 #endif /* MIPS */
1162 #endif /* IA64 */
1163 #endif /* I386 */
1164 #endif /* S390 */
1165 #endif /* LINUX */
1166 #ifdef SUNOS4
1167                 /* get error code from user struct */
1168                 if (upeek(pid, uoff(u_error), &u_error) < 0)
1169                         return -1;
1170                 u_error >>= 24; /* u_error is a char */
1171
1172                 /* get system call return value */
1173                 if (upeek(pid, uoff(u_rval1), &tcp->u_rval) < 0)
1174                         return -1;
1175 #endif /* SUNOS4 */
1176 #ifdef SVR4
1177 #ifdef SPARC
1178                 /* Judicious guessing goes a long way. */
1179                 if (tcp->status.pr_reg[R_PSR] & 0x100000) {
1180                         tcp->u_rval = -1;
1181                         u_error = tcp->status.pr_reg[R_O0];
1182                 }
1183                 else {
1184                         tcp->u_rval = tcp->status.pr_reg[R_O0];
1185                         u_error = 0;
1186                 }
1187 #endif /* SPARC */
1188 #ifdef I386
1189                 /* Wanna know how to kill an hour single-stepping? */
1190                 if (tcp->status.PR_REG[EFL] & 0x1) {
1191                         tcp->u_rval = -1;
1192                         u_error = tcp->status.PR_REG[EAX];
1193                 }
1194                 else {
1195                         tcp->u_rval = tcp->status.PR_REG[EAX];
1196 #ifdef HAVE_LONG_LONG
1197                         tcp->u_lrval =
1198                                 ((unsigned long long) tcp->status.PR_REG[EDX] << 32) +
1199                                 tcp->status.PR_REG[EAX];
1200 #endif
1201                         u_error = 0;
1202                 }
1203 #endif /* I386 */
1204 #ifdef MIPS
1205                 if (tcp->status.pr_reg[CTX_A3]) {
1206                         tcp->u_rval = -1;
1207                         u_error = tcp->status.pr_reg[CTX_V0];
1208                 }
1209                 else {
1210                         tcp->u_rval = tcp->status.pr_reg[CTX_V0];
1211                         u_error = 0;
1212                 }
1213 #endif /* MIPS */
1214 #endif /* SVR4 */
1215 #ifdef FREEBSD
1216                 if (regs.r_eflags & PSL_C) {
1217                         tcp->u_rval = -1;
1218                         u_error = regs.r_eax;
1219                 } else {
1220                         tcp->u_rval = regs.r_eax;
1221                         tcp->u_lrval =
1222                           ((unsigned long long) regs.r_edx << 32) +  regs.r_eax;
1223                         u_error = 0;
1224                 }
1225 #endif /* FREEBSD */
1226         tcp->u_error = u_error;
1227         return 1;
1228 }
1229
1230 int syscall_enter(tcp)
1231 struct tcb *tcp;
1232 {
1233 #ifndef USE_PROCFS
1234         int pid = tcp->pid;
1235 #endif /* !USE_PROCFS */
1236 #ifdef LINUX
1237 #if defined(S390)
1238         {
1239                 int i;
1240                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1241                         tcp->u_nargs = sysent[tcp->scno].nargs;
1242                 else
1243                         tcp->u_nargs = MAX_ARGS;
1244                 for (i = 0; i < tcp->u_nargs; i++) {
1245                         if (upeek(pid,i==0 ? PT_ORIGGPR2:PT_GPR2+(i<<2), &tcp->u_arg[i]) < 0)
1246                                 return -1;
1247                 }
1248         }
1249 #elif defined (ALPHA)
1250         {
1251                 int i;
1252                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1253                         tcp->u_nargs = sysent[tcp->scno].nargs;
1254                 else
1255                         tcp->u_nargs = MAX_ARGS;
1256                 for (i = 0; i < tcp->u_nargs; i++) {
1257                         /* WTA: if scno is out-of-bounds this will bomb. Add range-check
1258                          * for scno somewhere above here!
1259                          */
1260                         if (upeek(pid, REG_A0+i, &tcp->u_arg[i]) < 0)
1261                                 return -1;
1262                 }
1263         }
1264 #elif defined (IA64)
1265         {
1266                 if (!ia32) {
1267                         unsigned long *out0, *rbs_end, cfm, sof, sol, i;
1268                         /* be backwards compatible with kernel < 2.4.4... */
1269 #                       ifndef PT_RBS_END
1270 #                         define PT_RBS_END     PT_AR_BSP
1271 #                       endif
1272
1273                         if (upeek(pid, PT_RBS_END, (long *) &rbs_end) < 0)
1274                                 return -1;
1275                         if (upeek(pid, PT_CFM, (long *) &cfm) < 0)
1276                                 return -1;
1277
1278                         sof = (cfm >> 0) & 0x7f;
1279                         sol = (cfm >> 7) & 0x7f;
1280                         out0 = ia64_rse_skip_regs(rbs_end, -sof + sol);
1281
1282                         if (tcp->scno >= 0 && tcp->scno < nsyscalls
1283                             && sysent[tcp->scno].nargs != -1)
1284                                 tcp->u_nargs = sysent[tcp->scno].nargs;
1285                         else
1286                                 tcp->u_nargs = MAX_ARGS;
1287                         for (i = 0; i < tcp->u_nargs; ++i) {
1288                                 if (umoven(tcp, (unsigned long) ia64_rse_skip_regs(out0, i),
1289                                            sizeof(long), (char *) &tcp->u_arg[i]) < 0)
1290                                         return -1;
1291                         }
1292                 } else {
1293                         int i;
1294
1295                         if (/* EBX = out0 */
1296                             upeek(pid, PT_R11, (long *) &tcp->u_arg[0]) < 0
1297                             /* ECX = out1 */
1298                             || upeek(pid, PT_R9,  (long *) &tcp->u_arg[1]) < 0
1299                             /* EDX = out2 */
1300                             || upeek(pid, PT_R10, (long *) &tcp->u_arg[2]) < 0
1301                             /* ESI = out3 */
1302                             || upeek(pid, PT_R14, (long *) &tcp->u_arg[3]) < 0
1303                             /* EDI = out4 */
1304                             || upeek(pid, PT_R15, (long *) &tcp->u_arg[4]) < 0
1305                             /* EBP = out5 */
1306                             || upeek(pid, PT_R13, (long *) &tcp->u_arg[5]) < 0)
1307                                 return -1;
1308
1309                         for (i = 0; i < 6; ++i)
1310                                 /* truncate away IVE sign-extension */
1311                                 tcp->u_arg[i] &= 0xffffffff;
1312
1313                         if (tcp->scno >= 0 && tcp->scno < nsyscalls
1314                             && sysent[tcp->scno].nargs != -1)
1315                                 tcp->u_nargs = sysent[tcp->scno].nargs;
1316                         else
1317                                 tcp->u_nargs = 5;
1318                 }
1319         }
1320 #elif defined (MIPS)
1321         {
1322                 long sp;
1323                 int i, nargs;
1324
1325                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1326                         nargs = tcp->u_nargs = sysent[tcp->scno].nargs;
1327                 else
1328                         nargs = tcp->u_nargs = MAX_ARGS;
1329                 if(nargs > 4) {
1330                         if(upeek(pid, REG_SP, &sp) < 0)
1331                                 return -1;
1332                         for(i = 0; i < 4; i++) {
1333                                 if (upeek(pid, REG_A0 + i, &tcp->u_arg[i])<0)
1334                                         return -1;
1335                         }
1336                         umoven(tcp, sp+16, (nargs-4) * sizeof(tcp->u_arg[0]),
1337                                (char *)(tcp->u_arg + 4));
1338                 } else {
1339                         for(i = 0; i < nargs; i++) {
1340                                 if (upeek(pid, REG_A0 + i, &tcp->u_arg[i]) < 0)
1341                                         return -1;
1342                         }
1343                 }
1344         }
1345 #elif defined (POWERPC)
1346         {
1347                 int i;
1348                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1349                         tcp->u_nargs = sysent[tcp->scno].nargs;
1350                 else
1351                         tcp->u_nargs = MAX_ARGS;
1352                 for (i = 0; i < tcp->u_nargs; i++) {
1353                         if (upeek(pid, (i==0) ? (4*PT_ORIG_R3) : ((i+PT_R3)*4), &tcp->u_arg[i]) < 0)
1354                                 return -1;
1355                 }
1356         }
1357 #elif defined (SPARC)
1358         {
1359                 int i;
1360
1361                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1362                         tcp->u_nargs = sysent[tcp->scno].nargs;
1363                 else
1364                         tcp->u_nargs = MAX_ARGS;
1365                 for (i = 0; i < tcp->u_nargs; i++)
1366                         tcp->u_arg[i] = *((&regs.r_o0) + i);
1367         }
1368 #elif defined (HPPA)
1369         {
1370                 int i;
1371
1372                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1373                         tcp->u_nargs = sysent[tcp->scno].nargs;
1374                 else
1375                         tcp->u_nargs = MAX_ARGS;
1376                 for (i = 0; i < tcp->u_nargs; i++) {
1377                         if (upeek(pid, PT_GR26-4*i, &tcp->u_arg[i]) < 0)
1378                                 return -1;
1379                 }
1380         }
1381 #else /* Other architecture (like i386) (32bits specific) */
1382         {
1383                 int i;
1384                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1385                         tcp->u_nargs = sysent[tcp->scno].nargs;
1386                 else
1387                         tcp->u_nargs = MAX_ARGS;
1388                 for (i = 0; i < tcp->u_nargs; i++) {
1389                         if (upeek(pid, i*4, &tcp->u_arg[i]) < 0)
1390                                 return -1;
1391                 }
1392         }
1393 #endif
1394 #endif /* LINUX */
1395 #ifdef SUNOS4
1396         {
1397                 int i;
1398                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1399                         tcp->u_nargs = sysent[tcp->scno].nargs;
1400                 else
1401                         tcp->u_nargs = MAX_ARGS;
1402                 for (i = 0; i < tcp->u_nargs; i++) {
1403                         struct user *u;
1404
1405                         if (upeek(pid, uoff(u_arg[0]) +
1406                             (i*sizeof(u->u_arg[0])), &tcp->u_arg[i]) < 0)
1407                                 return -1;
1408                 }
1409         }
1410 #endif /* SUNOS4 */
1411 #ifdef SVR4
1412 #ifdef MIPS
1413         /*
1414          * SGI is broken: even though it has pr_sysarg, it doesn't
1415          * set them on system call entry.  Get a clue.
1416          */
1417         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1418                 tcp->u_nargs = sysent[tcp->scno].nargs;
1419         else
1420                 tcp->u_nargs = tcp->status.pr_nsysarg;
1421         if (tcp->u_nargs > 4) {
1422                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1423                         4*sizeof(tcp->u_arg[0]));
1424                 umoven(tcp, tcp->status.pr_reg[CTX_SP] + 16,
1425                         (tcp->u_nargs - 4)*sizeof(tcp->u_arg[0]), (char *) (tcp->u_arg + 4));
1426         }
1427         else {
1428                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1429                         tcp->u_nargs*sizeof(tcp->u_arg[0]));
1430         }
1431 #elif UNIXWARE >= 2
1432         /*
1433          * Like SGI, UnixWare doesn't set pr_sysarg until system call exit
1434          */
1435         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1436                 tcp->u_nargs = sysent[tcp->scno].nargs;
1437         else
1438                 tcp->u_nargs = tcp->status.pr_lwp.pr_nsysarg;
1439         umoven(tcp, tcp->status.PR_REG[UESP] + 4,
1440                 tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
1441 #elif defined (HAVE_PR_SYSCALL)
1442         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1443                 tcp->u_nargs = sysent[tcp->scno].nargs;
1444         else
1445                 tcp->u_nargs = tcp->status.pr_nsysarg;
1446         {
1447                 int i;
1448                 for (i = 0; i < tcp->u_nargs; i++)
1449                         tcp->u_arg[i] = tcp->status.pr_sysarg[i];
1450         }
1451 #elif defined (I386)
1452         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1453                 tcp->u_nargs = sysent[tcp->scno].nargs;
1454         else
1455                 tcp->u_nargs = 5;
1456         umoven(tcp, tcp->status.PR_REG[UESP] + 4,
1457                 tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
1458 #else
1459         I DONT KNOW WHAT TO DO
1460 #endif /* !HAVE_PR_SYSCALL */
1461 #endif /* SVR4 */
1462 #ifdef FREEBSD
1463         if (tcp->scno >= 0 && tcp->scno < nsyscalls &&
1464             sysent[tcp->scno].nargs > tcp->status.val)
1465                 tcp->u_nargs = sysent[tcp->scno].nargs;
1466         else
1467                 tcp->u_nargs = tcp->status.val;
1468         if (tcp->u_nargs < 0)
1469                 tcp->u_nargs = 0;
1470         if (tcp->u_nargs > MAX_ARGS)
1471                 tcp->u_nargs = MAX_ARGS;
1472         switch(regs.r_eax) {
1473         case SYS___syscall:
1474                 pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
1475                       regs.r_esp + sizeof(int) + sizeof(quad_t));
1476           break;
1477         case SYS_syscall:
1478                 pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
1479                       regs.r_esp + 2 * sizeof(int));
1480           break;
1481         default:
1482                 pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
1483                       regs.r_esp + sizeof(int));
1484           break;
1485         }
1486 #endif /* FREEBSD */
1487         return 1;
1488 }
1489
1490 int
1491 trace_syscall(tcp)
1492 struct tcb *tcp;
1493 {
1494         int sys_res;
1495         struct timeval tv;
1496         int res;
1497
1498         /* Measure the exit time as early as possible to avoid errors. */
1499         if (dtime && (tcp->flags & TCB_INSYSCALL))
1500                 gettimeofday(&tv, NULL);
1501
1502         res = get_scno(tcp);
1503         if (res != 1)
1504                 return res;
1505
1506         res = syscall_fixup(tcp);
1507         if (res != 1)
1508                 return res;
1509
1510         if (tcp->flags & TCB_INSYSCALL) {
1511                 long u_error;
1512                 res = get_error(tcp);
1513                 if (res != 1)
1514                         return res;
1515                 u_error = tcp->u_error;
1516
1517
1518                 internal_syscall(tcp);
1519                 if (tcp->scno >= 0 && tcp->scno < nsyscalls &&
1520                     !(qual_flags[tcp->scno] & QUAL_TRACE)) {
1521                         tcp->flags &= ~TCB_INSYSCALL;
1522                         return 0;
1523                 }
1524
1525                 if (tcp->flags & TCB_REPRINT) {
1526                         printleader(tcp);
1527                         tprintf("<... ");
1528                         if (tcp->scno >= nsyscalls || tcp->scno < 0)
1529                                 tprintf("syscall_%lu", tcp->scno);
1530                         else
1531                                 tprintf("%s", sysent[tcp->scno].sys_name);
1532                         tprintf(" resumed> ");
1533                 }
1534
1535                 if (cflag && tcp->scno < nsyscalls && tcp->scno >= 0) {
1536                         call_count[tcp->scno]++;
1537                         if (tcp->u_error)
1538                                 error_count[tcp->scno]++;
1539                         tv_sub(&tv, &tv, &tcp->etime);
1540 #ifdef LINUX
1541                         if (tv_cmp(&tv, &tcp->dtime) > 0) {
1542                                 static struct timeval one_tick =
1543                                         { 0, 1000000 / HZ };
1544
1545                                 if (tv_nz(&tcp->dtime))
1546                                         tv = tcp->dtime;
1547                                 else if (tv_cmp(&tv, &one_tick) > 0) {
1548                                         if (tv_cmp(&shortest, &one_tick) < 0)
1549                                                 tv = shortest;
1550                                         else
1551                                                 tv = one_tick;
1552                                 }
1553                         }
1554 #endif /* LINUX */
1555                         if (tv_cmp(&tv, &shortest) < 0)
1556                                 shortest = tv;
1557                         tv_add(&tv_count[tcp->scno],
1558                                 &tv_count[tcp->scno], &tv);
1559                         tcp->flags &= ~TCB_INSYSCALL;
1560                         return 0;
1561                 }
1562
1563                 if (tcp->scno >= nsyscalls || tcp->scno < 0
1564                     || (qual_flags[tcp->scno] & QUAL_RAW))
1565                         sys_res = printargs(tcp);
1566                 else
1567                         sys_res = (*sysent[tcp->scno].sys_func)(tcp);
1568                 u_error = tcp->u_error;
1569                 tprintf(") ");
1570                 tabto(acolumn);
1571                 if (tcp->scno >= nsyscalls || tcp->scno < 0 ||
1572                     qual_flags[tcp->scno] & QUAL_RAW) {
1573                         if (u_error)
1574                                 tprintf("= -1 (errno %ld)", u_error);
1575                         else
1576                                 tprintf("= %#lx", tcp->u_rval);
1577                 }
1578                 else if (!(sys_res & RVAL_NONE) && u_error) {
1579                         switch (u_error) {
1580 #ifdef LINUX
1581                         case ERESTARTSYS:
1582                                 tprintf("= ? ERESTARTSYS (To be restarted)");
1583                                 break;
1584                         case ERESTARTNOINTR:
1585                                 tprintf("= ? ERESTARTNOINTR (To be restarted)");
1586                                 break;
1587                         case ERESTARTNOHAND:
1588                                 tprintf("= ? ERESTARTNOHAND (To be restarted)");
1589                                 break;
1590 #endif /* LINUX */
1591                         default:
1592                                 tprintf("= -1 ");
1593                                 if (u_error < nerrnos && u_error < sys_nerr)
1594                                         tprintf("%s (%s)", errnoent[u_error],
1595                                                 sys_errlist[u_error]);
1596                                 else if (u_error < nerrnos)
1597                                         tprintf("%s (errno %ld)",
1598                                                 errnoent[u_error], u_error);
1599                                 else if (u_error < sys_nerr)
1600                                         tprintf("ERRNO_%ld (%s)", u_error,
1601                                                 sys_errlist[u_error]);
1602                                 else
1603                                         tprintf("E??? (errno %ld)", u_error);
1604                                 break;
1605                         }
1606                 }
1607                 else {
1608                         if (sys_res & RVAL_NONE)
1609                                 tprintf("= ?");
1610                         else {
1611                                 switch (sys_res & RVAL_MASK) {
1612                                 case RVAL_HEX:
1613                                         tprintf("= %#lx", tcp->u_rval);
1614                                         break;
1615                                 case RVAL_OCTAL:
1616                                         tprintf("= %#lo", tcp->u_rval);
1617                                         break;
1618                                 case RVAL_UDECIMAL:
1619                                         tprintf("= %lu", tcp->u_rval);
1620                                         break;
1621                                 case RVAL_DECIMAL:
1622                                         tprintf("= %ld", tcp->u_rval);
1623                                         break;
1624 #ifdef HAVE_LONG_LONG
1625                                 case RVAL_LHEX:
1626                                         tprintf("= %#llx", tcp->u_lrval);
1627                                         break;
1628                                 case RVAL_LOCTAL:
1629                                         tprintf("= %#llo", tcp->u_lrval);
1630                                         break;
1631                                 case RVAL_LUDECIMAL:
1632                                         tprintf("= %llu", tcp->u_lrval);
1633                                         break;
1634                                 case RVAL_LDECIMAL:
1635                                         tprintf("= %lld", tcp->u_lrval);
1636                                         break;
1637 #endif
1638                                 default:
1639                                         fprintf(stderr,
1640                                                 "invalid rval format\n");
1641                                         break;
1642                                 }
1643                         }
1644                         if ((sys_res & RVAL_STR) && tcp->auxstr)
1645                                 tprintf(" (%s)", tcp->auxstr);
1646                 }
1647                 if (dtime) {
1648                         tv_sub(&tv, &tv, &tcp->etime);
1649                         tprintf(" <%ld.%06ld>",
1650                                 (long) tv.tv_sec, (long) tv.tv_usec);
1651                 }
1652                 printtrailer(tcp);
1653
1654                 dumpio(tcp);
1655                 if (fflush(tcp->outf) == EOF)
1656                         return -1;
1657                 tcp->flags &= ~TCB_INSYSCALL;
1658                 return 0;
1659         }
1660
1661         /* Entering system call */
1662         res = syscall_enter(tcp);
1663         if (res != 1)
1664                 return res;
1665
1666         switch (tcp->scno + NR_SYSCALL_BASE) {
1667 #ifdef LINUX
1668 #if !defined (ALPHA) && !defined(SPARC) && !defined(MIPS) && !defined(HPPA)
1669         case SYS_socketcall:
1670                 decode_subcall(tcp, SYS_socket_subcall,
1671                         SYS_socket_nsubcalls, deref_style);
1672                 break;
1673         case SYS_ipc:
1674                 decode_subcall(tcp, SYS_ipc_subcall,
1675                         SYS_ipc_nsubcalls, shift_style);
1676                 break;
1677 #endif /* !ALPHA && !MIPS && !SPARC */
1678 #ifdef SPARC
1679         case SYS_socketcall:
1680                 sparc_socket_decode (tcp);
1681                 break;
1682 #endif
1683 #endif /* LINUX */
1684 #ifdef SVR4
1685 #ifdef SYS_pgrpsys_subcall
1686         case SYS_pgrpsys:
1687                 decode_subcall(tcp, SYS_pgrpsys_subcall,
1688                         SYS_pgrpsys_nsubcalls, shift_style);
1689                 break;
1690 #endif /* SYS_pgrpsys_subcall */
1691 #ifdef SYS_sigcall_subcall
1692         case SYS_sigcall:
1693                 decode_subcall(tcp, SYS_sigcall_subcall,
1694                         SYS_sigcall_nsubcalls, mask_style);
1695                 break;
1696 #endif /* SYS_sigcall_subcall */
1697         case SYS_msgsys:
1698                 decode_subcall(tcp, SYS_msgsys_subcall,
1699                         SYS_msgsys_nsubcalls, shift_style);
1700                 break;
1701         case SYS_shmsys:
1702                 decode_subcall(tcp, SYS_shmsys_subcall,
1703                         SYS_shmsys_nsubcalls, shift_style);
1704                 break;
1705         case SYS_semsys:
1706                 decode_subcall(tcp, SYS_semsys_subcall,
1707                         SYS_semsys_nsubcalls, shift_style);
1708                 break;
1709 #if 0 /* broken */
1710         case SYS_utssys:
1711                 decode_subcall(tcp, SYS_utssys_subcall,
1712                         SYS_utssys_nsubcalls, shift_style);
1713                 break;
1714 #endif
1715         case SYS_sysfs:
1716                 decode_subcall(tcp, SYS_sysfs_subcall,
1717                         SYS_sysfs_nsubcalls, shift_style);
1718                 break;
1719         case SYS_spcall:
1720                 decode_subcall(tcp, SYS_spcall_subcall,
1721                         SYS_spcall_nsubcalls, shift_style);
1722                 break;
1723 #ifdef SYS_context_subcall
1724         case SYS_context:
1725                 decode_subcall(tcp, SYS_context_subcall,
1726                         SYS_context_nsubcalls, shift_style);
1727                 break;
1728 #endif /* SYS_context_subcall */
1729 #ifdef SYS_door_subcall
1730         case SYS_door:
1731                 decode_subcall(tcp, SYS_door_subcall,
1732                         SYS_door_nsubcalls, door_style);
1733                 break;
1734 #endif /* SYS_door_subcall */
1735 #ifdef SYS_kaio_subcall
1736         case SYS_kaio:
1737                 decode_subcall(tcp, SYS_kaio_subcall,
1738                         SYS_kaio_nsubcalls, shift_style);
1739                 break;
1740 #endif
1741 #endif /* SVR4 */
1742 #ifdef FREEBSD
1743         case SYS_msgsys:
1744         case SYS_shmsys:
1745         case SYS_semsys:
1746                 decode_subcall(tcp, 0, 0, table_style);
1747                 break;
1748 #endif
1749 #ifdef SUNOS4
1750         case SYS_semsys:
1751                 decode_subcall(tcp, SYS_semsys_subcall,
1752                         SYS_semsys_nsubcalls, shift_style);
1753                 break;
1754         case SYS_msgsys:
1755                 decode_subcall(tcp, SYS_msgsys_subcall,
1756                         SYS_msgsys_nsubcalls, shift_style);
1757                 break;
1758         case SYS_shmsys:
1759                 decode_subcall(tcp, SYS_shmsys_subcall,
1760                         SYS_shmsys_nsubcalls, shift_style);
1761                 break;
1762 #endif
1763         }
1764
1765         internal_syscall(tcp);
1766         if (tcp->scno >=0 && tcp->scno < nsyscalls && !(qual_flags[tcp->scno] & QUAL_TRACE)) {
1767                 tcp->flags |= TCB_INSYSCALL;
1768                 return 0;
1769         }
1770
1771         if (cflag) {
1772                 gettimeofday(&tcp->etime, NULL);
1773                 tcp->flags |= TCB_INSYSCALL;
1774                 return 0;
1775         }
1776
1777         printleader(tcp);
1778         tcp->flags &= ~TCB_REPRINT;
1779         tcp_last = tcp;
1780         if (tcp->scno >= nsyscalls || tcp->scno < 0)
1781                 tprintf("syscall_%lu(", tcp->scno);
1782         else
1783                 tprintf("%s(", sysent[tcp->scno].sys_name);
1784         if (tcp->scno >= nsyscalls || tcp->scno < 0 ||
1785             ((qual_flags[tcp->scno] & QUAL_RAW) && tcp->scno != SYS_exit))
1786                 sys_res = printargs(tcp);
1787         else
1788                 sys_res = (*sysent[tcp->scno].sys_func)(tcp);
1789         if (fflush(tcp->outf) == EOF)
1790                 return -1;
1791         tcp->flags |= TCB_INSYSCALL;
1792         /* Measure the entrance time as late as possible to avoid errors. */
1793         if (dtime)
1794                 gettimeofday(&tcp->etime, NULL);
1795         return sys_res;
1796 }
1797
1798 int
1799 printargs(tcp)
1800 struct tcb *tcp;
1801 {
1802         if (entering(tcp)) {
1803                 int i;
1804
1805                 for (i = 0; i < tcp->u_nargs; i++)
1806                         tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
1807         }
1808         return 0;
1809 }
1810
1811 long
1812 getrval2(tcp)
1813 struct tcb *tcp;
1814 {
1815         long val = -1;
1816
1817 #ifdef LINUX
1818 #ifdef SPARC
1819         struct regs regs;
1820         if (ptrace(PTRACE_GETREGS,tcp->pid,(char *)&regs,0) < 0)
1821                 return -1;
1822         val = regs.r_o1;
1823 #endif /* SPARC */
1824 #endif /* LINUX */
1825
1826 #ifdef SUNOS4
1827         if (upeek(tcp->pid, uoff(u_rval2), &val) < 0)
1828                 return -1;
1829 #endif /* SUNOS4 */
1830
1831 #ifdef SVR4
1832 #ifdef SPARC
1833         val = tcp->status.PR_REG[R_O1];
1834 #endif /* SPARC */
1835 #ifdef I386
1836         val = tcp->status.PR_REG[EDX];
1837 #endif /* I386 */
1838 #ifdef MIPS
1839         val = tcp->status.PR_REG[CTX_V1];
1840 #endif /* MIPS */
1841 #endif /* SVR4 */
1842 #ifdef FREEBSD
1843         struct reg regs;
1844         pread(tcp->pfd_reg, &regs, sizeof(regs), 0);
1845         val = regs.r_edx;
1846 #endif
1847         return val;
1848 }
1849
1850 /*
1851  * Apparently, indirect system calls have already be converted by ptrace(2),
1852  * so if you see "indir" this program has gone astray.
1853  */
1854 int
1855 sys_indir(tcp)
1856 struct tcb *tcp;
1857 {
1858         int i, scno, nargs;
1859
1860         if (entering(tcp)) {
1861                 if ((scno = tcp->u_arg[0]) > nsyscalls) {
1862                         fprintf(stderr, "Bogus syscall: %u\n", scno);
1863                         return 0;
1864                 }
1865                 nargs = sysent[scno].nargs;
1866                 tprintf("%s", sysent[scno].sys_name);
1867                 for (i = 0; i < nargs; i++)
1868                         tprintf(", %#lx", tcp->u_arg[i+1]);
1869         }
1870         return 0;
1871 }
1872
1873 static int
1874 time_cmp(a, b)
1875 void *a;
1876 void *b;
1877 {
1878         return -tv_cmp(&tv_count[*((int *) a)], &tv_count[*((int *) b)]);
1879 }
1880
1881 static int
1882 syscall_cmp(a, b)
1883 void *a;
1884 void *b;
1885 {
1886         return strcmp(sysent[*((int *) a)].sys_name,
1887                 sysent[*((int *) b)].sys_name);
1888 }
1889
1890 static int
1891 count_cmp(a, b)
1892 void *a;
1893 void *b;
1894 {
1895         int m = call_count[*((int *) a)], n = call_count[*((int *) b)];
1896
1897         return (m < n) ? 1 : (m > n) ? -1 : 0;
1898 }
1899
1900 static int (*sortfun)();
1901 static struct timeval overhead = { -1, -1 };
1902
1903 void
1904 set_sortby(sortby)
1905 char *sortby;
1906 {
1907         if (strcmp(sortby, "time") == 0)
1908                 sortfun = time_cmp;
1909         else if (strcmp(sortby, "calls") == 0)
1910                 sortfun = count_cmp;
1911         else if (strcmp(sortby, "name") == 0)
1912                 sortfun = syscall_cmp;
1913         else if (strcmp(sortby, "nothing") == 0)
1914                 sortfun = NULL;
1915         else {
1916                 fprintf(stderr, "invalid sortby: `%s'\n", sortby);
1917                 exit(1);
1918         }
1919 }
1920
1921 void set_overhead(n)
1922 int n;
1923 {
1924         overhead.tv_sec = n / 1000000;
1925         overhead.tv_usec = n % 1000000;
1926 }
1927
1928 void
1929 call_summary(outf)
1930 FILE *outf;
1931 {
1932         int i, j;
1933         int call_cum, error_cum;
1934         struct timeval tv_cum, dtv;
1935         double percent;
1936         char *dashes = "-------------------------";
1937         char error_str[16];
1938
1939         call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0;
1940         if (overhead.tv_sec == -1) {
1941                 tv_mul(&overhead, &shortest, 8);
1942                 tv_div(&overhead, &overhead, 10);
1943         }
1944         for (i = 0; i < nsyscalls; i++) {
1945                 sorted_count[i] = i;
1946                 if (call_count[i] == 0)
1947                         continue;
1948                 tv_mul(&dtv, &overhead, call_count[i]);
1949                 tv_sub(&tv_count[i], &tv_count[i], &dtv);
1950                 call_cum += call_count[i];
1951                 error_cum += error_count[i];
1952                 tv_add(&tv_cum, &tv_cum, &tv_count[i]);
1953         }
1954         if (sortfun)
1955                 qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun);
1956         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n",
1957                 "% time", "seconds", "usecs/call",
1958                 "calls", "errors", "syscall");
1959         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
1960                 dashes, dashes, dashes, dashes, dashes, dashes);
1961         for (i = 0; i < nsyscalls; i++) {
1962                 j = sorted_count[i];
1963                 if (call_count[j] == 0)
1964                         continue;
1965                 tv_div(&dtv, &tv_count[j], call_count[j]);
1966                 if (error_count[j])
1967                         sprintf(error_str, "%d", error_count[j]);
1968                 else
1969                         error_str[0] = '\0';
1970                 percent = 100.0*tv_float(&tv_count[j])/tv_float(&tv_cum);
1971                 fprintf(outf, "%6.2f %4ld.%06ld %11ld %9d %9.9s %s\n",
1972                         percent, (long) tv_count[j].tv_sec,
1973                         (long) tv_count[j].tv_usec,
1974                         (long) 1000000 * dtv.tv_sec + dtv.tv_usec,
1975                         call_count[j], error_str, sysent[j].sys_name);
1976         }
1977         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
1978                 dashes, dashes, dashes, dashes, dashes, dashes);
1979         if (error_cum)
1980                 sprintf(error_str, "%d", error_cum);
1981         else
1982                 error_str[0] = '\0';
1983         fprintf(outf, "%6.6s %4ld.%06ld %11.11s %9d %9.9s %s\n",
1984                 "100.00", (long) tv_cum.tv_sec, (long) tv_cum.tv_usec, "",
1985                 call_cum, error_str, "total");
1986 }