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 #define NR_SYSCALL_BASE 0
  75 #ifdef LINUX
  76 #ifndef ERESTARTSYS
  77 #define ERESTARTSYS     512
  78 #endif
  79 #ifndef ERESTARTNOINTR
  80 #define ERESTARTNOINTR  513
  81 #endif
  82 #ifndef ERESTARTNOHAND
  83 #define ERESTARTNOHAND  514     /* restart if no handler.. */
  84 #endif
  85 #ifndef ENOIOCTLCMD
  86 #define ENOIOCTLCMD     515     /* No ioctl command */
  87 #endif
  88 #ifndef NSIG
  89 #define NSIG 32
  90 #endif
  91 #ifdef ARM
  92 #undef NSIG
  93 #define NSIG 32
  94 #undef NR_SYSCALL_BASE
  95 #define NR_SYSCALL_BASE __NR_SYSCALL_BASE
  96 #endif
  97 #endif /* LINUX */
  98
  99 #include "syscall.h"
 100
 101 /* Define these shorthand notations to simplify the syscallent files. */
 102 #define TF TRACE_FILE
 103 #define TI TRACE_IPC
 104 #define TN TRACE_NETWORK
 105 #define TP TRACE_PROCESS
 106 #define TS TRACE_SIGNAL
 107
 108 struct sysent sysent0[] = {
 109 #include "syscallent.h"
 110 };
 111 int nsyscalls0 = sizeof sysent0 / sizeof sysent0[0];
 112
 113 #if SUPPORTED_PERSONALITIES >= 2
 114 struct sysent sysent1[] = {
 115 #include "syscallent1.h"
 116 };
 117 int nsyscalls1 = sizeof sysent1 / sizeof sysent1[0];
 118 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 119
 120 #if SUPPORTED_PERSONALITIES >= 3
 121 struct sysent sysent2[] = {
 122 #include "syscallent2.h"
 123 };
 124 int nsyscalls2 = sizeof sysent2 / sizeof sysent2[0];
 125 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 126
 127 struct sysent *sysent;
 128 int nsyscalls;
 129
 130 /* Now undef them since short defines cause wicked namespace pollution. */
 131 #undef TF
 132 #undef TI
 133 #undef TN
 134 #undef TP
 135 #undef TS
 136
 137 char *errnoent0[] = {
 138 #include "errnoent.h"
 139 };
 140 int nerrnos0 = sizeof errnoent0 / sizeof errnoent0[0];
 141
 142 #if SUPPORTED_PERSONALITIES >= 2
 143 char *errnoent1[] = {
 144 #include "errnoent1.h"
 145 };
 146 int nerrnos1 = sizeof errnoent1 / sizeof errnoent1[0];
 147 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 148
 149 #if SUPPORTED_PERSONALITIES >= 3
 150 char *errnoent2[] = {
 151 #include "errnoent2.h"
 152 };
 153 int nerrnos2 = sizeof errnoent2 / sizeof errnoent2[0];
 154 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 155
 156 char **errnoent;
 157 int nerrnos;
 158
 159 int current_personality;
 160
 161 int
 162 set_personality(personality)
 163 int personality;
 164 {
 165         switch (personality) {
 166         case 0:
 167                 errnoent = errnoent0;
 168                 nerrnos = nerrnos0;
 169                 sysent = sysent0;
 170                 nsyscalls = nsyscalls0;
 171                 ioctlent = ioctlent0;
 172                 nioctlents = nioctlents0;
 173                 signalent = signalent0;
 174                 nsignals = nsignals0;
 175                 break;
 176
 177 #if SUPPORTED_PERSONALITIES >= 2
 178         case 1:
 179                 errnoent = errnoent1;
 180                 nerrnos = nerrnos1;
 181                 sysent = sysent1;
 182                 nsyscalls = nsyscalls1;
 183                 ioctlent = ioctlent1;
 184                 nioctlents = nioctlents1;
 185                 signalent = signalent1;
 186                 nsignals = nsignals1;
 187                 break;
 188 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 189
 190 #if SUPPORTED_PERSONALITIES >= 3
 191         case 2:
 192                 errnoent = errnoent2;
 193                 nerrnos = nerrnos2;
 194                 sysent = sysent2;
 195                 nsyscalls = nsyscalls2;
 196                 ioctlent = ioctlent2;
 197                 nioctlents = nioctlents2;
 198                 signalent = signalent2;
 199                 nsignals = nsignals2;
 200                 break;
 201 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 202
 203         default:
 204                 return -1;
 205         }
 206
 207         current_personality = personality;
 208         return 0;
 209 }
 210
 211 int qual_flags[MAX_QUALS];
 212
 213 static int call_count[MAX_QUALS];
 214 static int error_count[MAX_QUALS];
 215 static struct timeval tv_count[MAX_QUALS];
 216 static int sorted_count[MAX_QUALS];
 217
 218 static struct timeval shortest = { 1000000, 0 };
 219
 220 static int qual_syscall(), qual_signal(), qual_fault(), qual_desc();
 221
 222 static struct qual_options {
 223         int bitflag;
 224         char *option_name;
 225         int (*qualify)();
 226         char *argument_name;
 227 } qual_options[] = {
 228         { QUAL_TRACE,   "trace",        qual_syscall,   "system call"   },
 229         { QUAL_TRACE,   "t",            qual_syscall,   "system call"   },
 230         { QUAL_ABBREV,  "abbrev",       qual_syscall,   "system call"   },
 231         { QUAL_ABBREV,  "a",            qual_syscall,   "system call"   },
 232         { QUAL_VERBOSE, "verbose",      qual_syscall,   "system call"   },
 233         { QUAL_VERBOSE, "v",            qual_syscall,   "system call"   },
 234         { QUAL_RAW,     "raw",          qual_syscall,   "system call"   },
 235         { QUAL_RAW,     "x",            qual_syscall,   "system call"   },
 236         { QUAL_SIGNAL,  "signal",       qual_signal,    "signal"        },
 237         { QUAL_SIGNAL,  "signals",      qual_signal,    "signal"        },
 238         { QUAL_SIGNAL,  "s",            qual_signal,    "signal"        },
 239         { QUAL_FAULT,   "fault",        qual_fault,     "fault"         },
 240         { QUAL_FAULT,   "faults",       qual_fault,     "fault"         },
 241         { QUAL_FAULT,   "m",            qual_fault,     "fault"         },
 242         { QUAL_READ,    "read",         qual_desc,      "descriptor"    },
 243         { QUAL_READ,    "reads",        qual_desc,      "descriptor"    },
 244         { QUAL_READ,    "r",            qual_desc,      "descriptor"    },
 245         { QUAL_WRITE,   "write",        qual_desc,      "descriptor"    },
 246         { QUAL_WRITE,   "writes",       qual_desc,      "descriptor"    },
 247         { QUAL_WRITE,   "w",            qual_desc,      "descriptor"    },
 248         { 0,            NULL,           NULL,           NULL            },
 249 };
 250
 251 static void
 252 qualify_one(n, opt, not)
 253         int n;
 254         struct qual_options *opt;
 255         int not;
 256 {
 257         if (not)
 258                 qual_flags[n] &= ~opt->bitflag;
 259         else
 260                 qual_flags[n] |= opt->bitflag;
 261 }
 262
 263 static int
 264 qual_syscall(s, opt, not)
 265         char *s;
 266         struct qual_options *opt;
 267         int not;
 268 {
 269         int i;
 270         int any = 0;
 271
 272         for (i = 0; i < nsyscalls; i++) {
 273                 if (strcmp(s, sysent[i].sys_name) == 0) {
 274                         qualify_one(i, opt, not);
 275                         any = 1;
 276                 }
 277         }
 278         return !any;
 279 }
 280
 281 static int
 282 qual_signal(s, opt, not)
 283         char *s;
 284         struct qual_options *opt;
 285         int not;
 286 {
 287         int i;
 288         char buf[32];
 289
 290         if (s && *s && isdigit((unsigned char)*s)) {
 291                 qualify_one(atoi(s), opt, not);
 292                 return 1;
 293         }
 294         strcpy(buf, s);
 295         s = buf;
 296         for (i = 0; s[i]; i++)
 297                 s[i] = toupper((unsigned char)(s[i]));
 298         if (strncmp(s, "SIG", 3) == 0)
 299                 s += 3;
 300         for (i = 0; i <= NSIG; i++)
 301                 if (strcmp(s, signame(i) + 3) == 0) {
 302                         qualify_one(atoi(s), opt, not);
 303                         return 1;
 304                 }
 305         return 0;
 306 }
 307
 308 static int
 309 qual_fault(s, opt, not)
 310         char *s;
 311         struct qual_options *opt;
 312         int not;
 313 {
 314         return -1;
 315 }
 316
 317 static int
 318 qual_desc(s, opt, not)
 319         char *s;
 320         struct qual_options *opt;
 321         int not;
 322 {
 323         if (s && *s && isdigit((unsigned char)*s)) {
 324                 qualify_one(atoi(s), opt, not);
 325                 return 0;
 326         }
 327         return -1;
 328 }
 329
 330 static int
 331 lookup_class(s)
 332         char *s;
 333 {
 334         if (strcmp(s, "file") == 0)
 335                 return TRACE_FILE;
 336         if (strcmp(s, "ipc") == 0)
 337                 return TRACE_IPC;
 338         if (strcmp(s, "network") == 0)
 339                 return TRACE_NETWORK;
 340         if (strcmp(s, "process") == 0)
 341                 return TRACE_PROCESS;
 342         if (strcmp(s, "signal") == 0)
 343                 return TRACE_SIGNAL;
 344         return -1;
 345 }
 346
 347 void
 348 qualify(s)
 349 char *s;
 350 {
 351         struct qual_options *opt;
 352         int not;
 353         char *p;
 354         int i, n;
 355
 356         opt = &qual_options[0];
 357         for (i = 0; (p = qual_options[i].option_name); i++) {
 358                 n = strlen(p);
 359                 if (strncmp(s, p, n) == 0 && s[n] == '=') {
 360                         opt = &qual_options[i];
 361                         s += n + 1;
 362                         break;
 363                 }
 364         }
 365         not = 0;
 366         if (*s == '!') {
 367                 not = 1;
 368                 s++;
 369         }
 370         if (strcmp(s, "none") == 0) {
 371                 not = 1 - not;
 372                 s = "all";
 373         }
 374         if (strcmp(s, "all") == 0) {
 375                 for (i = 0; i < MAX_QUALS; i++) {
 376                         if (not)
 377                                 qual_flags[i] &= ~opt->bitflag;
 378                         else
 379                                 qual_flags[i] |= opt->bitflag;
 380                 }
 381                 return;
 382         }
 383         for (i = 0; i < MAX_QUALS; i++) {
 384                 if (not)
 385                         qual_flags[i] |= opt->bitflag;
 386                 else
 387                         qual_flags[i] &= ~opt->bitflag;
 388         }
 389         for (p = strtok(s, ","); p; p = strtok(NULL, ",")) {
 390                 if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
 391                         for (i = 0; i < MAX_QUALS; i++) {
 392                                 if (sysent[i].sys_flags & n) {
 393                                         if (not)
 394                                                 qual_flags[i] &= ~opt->bitflag;
 395                                         else
 396                                                 qual_flags[i] |= opt->bitflag;
 397                                 }
 398                         }
 399                         continue;
 400                 }
 401                 if (opt->qualify(p, opt, not)) {
 402                         fprintf(stderr, "strace: invalid %s `%s'\n",
 403                                 opt->argument_name, p);
 404                         exit(1);
 405                 }
 406         }
 407         return;
 408 }
 409
 410 static void
 411 dumpio(tcp)
 412 struct tcb *tcp;
 413 {
 414         if (syserror(tcp))
 415                 return;
 416         if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= MAX_QUALS)
 417                 return;
 418         switch (tcp->scno + NR_SYSCALL_BASE) {
 419         case SYS_read:
 420 #ifdef SYS_recv
 421         case SYS_recv:
 422 #endif
 423 #ifdef SYS_recvfrom
 424         case SYS_recvfrom:
 425 #endif
 426                 if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
 427                         dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
 428                 break;
 429         case SYS_write:
 430 #ifdef SYS_send
 431         case SYS_send:
 432 #endif
 433 #ifdef SYS_sendto
 434         case SYS_sendto:
 435 #endif
 436                 if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
 437                         dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 438                 break;
 439 #ifdef SYS_readv
 440         case SYS_readv:
 441                 if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
 442                         dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
 443                 break;
 444 #endif
 445 #ifdef SYS_writev
 446         case SYS_writev:
 447
 448                 if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
 449                         dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
 450                 break;
 451 #endif
 452         }
 453 }
 454
 455 #ifndef FREEBSD
 456 enum subcall_style { shift_style, deref_style, mask_style, door_style };
 457 #else /* FREEBSD */
 458 enum subcall_style { shift_style, deref_style, mask_style, door_style, table_style };
 459
 460 struct subcall {
 461   int call;
 462   int nsubcalls;
 463   int subcalls[5];
 464 };
 465
 466 const struct subcall subcalls_table[] = {
 467   { SYS_shmsys, 5, { SYS_shmat, SYS_shmctl, SYS_shmdt, SYS_shmget, SYS_shmctl } },
 468 #ifdef SYS_semconfig
 469   { SYS_semsys, 4, { SYS___semctl, SYS_semget, SYS_semop, SYS_semconfig } },
 470 #else
 471   { SYS_semsys, 3, { SYS___semctl, SYS_semget, SYS_semop } },
 472 #endif
 473   { SYS_msgsys, 4, { SYS_msgctl, SYS_msgget, SYS_msgsnd, SYS_msgrcv } },
 474 };
 475 #endif /* FREEBSD */
 476
 477 #if !(defined(LINUX) && ( defined(ALPHA) || defined(MIPS) ))
 478
 479 const int socket_map [] = {
 480                /* SYS_SOCKET      */ 97,
 481                /* SYS_BIND        */ 104,
 482                /* SYS_CONNECT     */ 98,
 483                /* SYS_LISTEN      */ 106,
 484                /* SYS_ACCEPT      */ 99,
 485                /* SYS_GETSOCKNAME */ 150,
 486                /* SYS_GETPEERNAME */ 141,
 487                /* SYS_SOCKETPAIR  */ 135,
 488                /* SYS_SEND        */ 101,
 489                /* SYS_RECV        */ 102,
 490                /* SYS_SENDTO      */ 133,
 491                /* SYS_RECVFROM    */ 125,
 492                /* SYS_SHUTDOWN    */ 134,
 493                /* SYS_SETSOCKOPT  */ 105,
 494                /* SYS_GETSOCKOPT  */ 118,
 495                /* SYS_SENDMSG     */ 114,
 496                /* SYS_RECVMSG     */ 113
 497 };
 498
 499 void
 500 sparc_socket_decode (tcp)
 501 struct tcb *tcp;
 502 {
 503         volatile long addr;
 504         volatile int i, n;
 505
 506         if (tcp->u_arg [0] < 1 || tcp->u_arg [0] > sizeof(socket_map)/sizeof(int)+1){
 507                 return;
 508         }
 509         tcp->scno = socket_map [tcp->u_arg [0]-1];
 510         n = tcp->u_nargs = sysent [tcp->scno].nargs;
 511         addr = tcp->u_arg [1];
 512         for (i = 0; i < n; i++){
 513                 int arg;
 514                 if (umoven (tcp, addr, sizeof (arg), (void *) &arg) < 0)
 515                         arg = 0;
 516                 tcp->u_arg [i] = arg;
 517                 addr += sizeof (arg);
 518         }
 519 }
 520
 521 void
 522 decode_subcall(tcp, subcall, nsubcalls, style)
 523 struct tcb *tcp;
 524 int subcall;
 525 int nsubcalls;
 526 enum subcall_style style;
 527 {
 528         long addr, mask, arg;
 529         int i;
 530
 531         switch (style) {
 532         case shift_style:
 533                 if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
 534                         return;
 535                 tcp->scno = subcall + tcp->u_arg[0];
 536                 if (sysent[tcp->scno].nargs != -1)
 537                         tcp->u_nargs = sysent[tcp->scno].nargs;
 538                 else
 539                         tcp->u_nargs--;
 540                 for (i = 0; i < tcp->u_nargs; i++)
 541                         tcp->u_arg[i] = tcp->u_arg[i + 1];
 542                 break;
 543         case deref_style:
 544                 if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
 545                         return;
 546                 tcp->scno = subcall + tcp->u_arg[0];
 547                 addr = tcp->u_arg[1];
 548                 for (i = 0; i < sysent[tcp->scno].nargs; i++) {
 549                         if (umove(tcp, addr, &arg) < 0)
 550                                 arg = 0;
 551                         tcp->u_arg[i] = arg;
 552                         addr += sizeof(arg);
 553                 }
 554                 tcp->u_nargs = sysent[tcp->scno].nargs;
 555                 break;
 556         case mask_style:
 557                 mask = (tcp->u_arg[0] >> 8) & 0xff;
 558                 for (i = 0; mask; i++)
 559                         mask >>= 1;
 560                 if (i >= nsubcalls)
 561                         return;
 562                 tcp->u_arg[0] &= 0xff;
 563                 tcp->scno = subcall + i;
 564                 if (sysent[tcp->scno].nargs != -1)
 565                         tcp->u_nargs = sysent[tcp->scno].nargs;
 566                 break;
 567         case door_style:
 568                 /*
 569                  * Oh, yuck.  The call code is the *sixth* argument.
 570                  * (don't you mean the *last* argument? - JH)
 571                  */
 572                 if (tcp->u_arg[5] < 0 || tcp->u_arg[5] >= nsubcalls)
 573                         return;
 574                 tcp->scno = subcall + tcp->u_arg[5];
 575                 if (sysent[tcp->scno].nargs != -1)
 576                         tcp->u_nargs = sysent[tcp->scno].nargs;
 577                 else
 578                         tcp->u_nargs--;
 579                 break;
 580 #ifdef FREEBSD
 581         case table_style:
 582                 for (i = 0; i < sizeof(subcalls_table) / sizeof(struct subcall); i++)
 583                         if (subcalls_table[i].call == tcp->scno) break;
 584                 if (i < sizeof(subcalls_table) / sizeof(struct subcall) &&
 585                     tcp->u_arg[0] >= 0 && tcp->u_arg[0] < subcalls_table[i].nsubcalls) {
 586                         tcp->scno = subcalls_table[i].subcalls[tcp->u_arg[0]];
 587                         for (i = 0; i < tcp->u_nargs; i++)
 588                                 tcp->u_arg[i] = tcp->u_arg[i + 1];
 589                 }
 590                 break;
 591 #endif /* FREEBSD */
 592         }
 593 }
 594 #endif
 595
 596 struct tcb *tcp_last = NULL;
 597
 598 static int
 599 internal_syscall(tcp)
 600 struct tcb *tcp;
 601 {
 602         /*
 603          * We must always trace a few critical system calls in order to
 604          * correctly support following forks in the presence of tracing
 605          * qualifiers.
 606          */
 607         switch (tcp->scno + NR_SYSCALL_BASE) {
 608 #ifdef SYS_fork
 609         case SYS_fork:
 610 #endif
 611 #ifdef SYS_vfork
 612         case SYS_vfork:
 613 #endif
 614 #ifdef SYS_fork1
 615         case SYS_fork1:
 616 #endif
 617 #ifdef SYS_forkall
 618         case SYS_forkall:
 619 #endif
 620 #ifdef SYS_rfork1
 621         case SYS_rfork1:
 622 #endif
 623 #ifdef SYS_rforkall
 624         case SYS_rforkall:
 625 #endif
 626 #ifdef SYS_rfork
 627         case SYS_rfork:
 628 #endif
 629                 internal_fork(tcp);
 630                 break;
 631 #ifdef SYS_clone
 632         case SYS_clone:
 633                 internal_clone(tcp);
 634                 break;
 635 #endif
 636 #ifdef SYS_clone2
 637         case SYS_clone2:
 638                 internal_clone(tcp);
 639                 break;
 640 #endif
 641 #ifdef SYS_execv
 642         case SYS_execv:
 643 #endif
 644 #ifdef SYS_execve
 645         case SYS_execve:
 646 #endif
 647 #ifdef SYS_rexecve
 648         case SYS_rexecve:
 649 #endif
 650                 internal_exec(tcp);
 651                 break;
 652
 653 #ifdef SYS_wait
 654         case SYS_wait:
 655 #endif
 656 #ifdef SYS_wait4
 657         case SYS_wait4:
 658 #endif
 659 #ifdef SYS32_wait4
 660         case SYS32_wait4:
 661 #endif
 662 #ifdef SYS_waitpid
 663         case SYS_waitpid:
 664 #endif
 665 #ifdef SYS_waitsys
 666         case SYS_waitsys:
 667 #endif
 668                 internal_wait(tcp);
 669                 break;
 670
 671 #ifdef SYS_exit
 672         case SYS_exit:
 673 #endif
 674 #ifdef SYS32_exit
 675         case SYS32_exit:
 676 #endif
 677 #ifdef __NR_exit_group
 678         case __NR_exit_group:
 679 #endif
 680                 internal_exit(tcp);
 681                 break;
 682         }
 683         return 0;
 684 }
 685
 686
 687 #ifdef LINUX
 688 #if defined (I386)
 689         static long eax;
 690 #elif defined (IA64)
 691         long r8, r10, psr;
 692         long ia32 = 0;
 693 #elif defined (POWERPC)
 694         static long result,flags;
 695 #elif defined (M68K)
 696         static int d0;
 697 #elif defined (ARM)
 698         static struct pt_regs regs;
 699 #elif defined (ALPHA)
 700         static long r0;
 701         static long a3;
 702 #elif defined (SPARC)
 703         static struct regs regs;
 704         static unsigned long trap;
 705 #elif defined(MIPS)
 706         static long a3;
 707         static long r2;
 708 #elif defined(S390) || defined(S390X)
 709         static long gpr2;
 710         static long pc;
 711         static long syscall_mode;
 712 #elif defined(HPPA)
 713         static long r28;
 714 #elif defined(SH)
 715        static long r0;
 716 #elif defined(SH64)
 717        static long r9;
 718 #elif defined(X86_64)
 719        static long rax;
 720 #endif
 721 #endif /* LINUX */
 722 #ifdef FREEBSD
 723         struct reg regs;
 724 #endif /* FREEBSD */
 725
 726 int
 727 get_scno(tcp)
 728 struct tcb *tcp;
 729 {
 730         long scno = 0;
 731 #ifndef USE_PROCFS
 732         int pid = tcp->pid;
 733 #endif /* !PROCFS */
 734
 735 #ifdef LINUX
 736 #if defined(S390) || defined(S390X)
 737         if (tcp->flags & TCB_WAITEXECVE) {
 738                 /*
 739                  * When the execve system call completes successfully, the
 740                  * new process still has -ENOSYS (old style) or __NR_execve
 741                  * (new style) in gpr2.  We cannot recover the scno again
 742                  * by disassembly, because the image that executed the
 743                  * syscall is gone now.  Fortunately, we don't want it.  We
 744                  * leave the flag set so that syscall_fixup can fake the
 745                  * result.
 746                  */
 747                 if (tcp->flags & TCB_INSYSCALL)
 748                         return 1;
 749                 /*
 750                  * This is the SIGTRAP after execve.  We cannot try to read
 751                  * the system call here either.
 752                  */
 753                 tcp->flags &= ~TCB_WAITEXECVE;
 754                 return 0;
 755         }
 756
 757         if (upeek(pid, PT_GPR2, &syscall_mode) < 0)
 758                         return -1;
 759
 760         if (syscall_mode != -ENOSYS) {
 761                 /*
 762                  * Since kernel version 2.5.44 the scno gets passed in gpr2.
 763                  */
 764                 scno = syscall_mode;
 765         } else {
 766                 /*
 767                  * Old style of "passing" the scno via the SVC instruction.
 768                  */
 769
 770                 long opcode, offset_reg, tmp;
 771                 void * svc_addr;
 772                 int gpr_offset[16] = {PT_GPR0,  PT_GPR1,  PT_ORIGGPR2, PT_GPR3,
 773                                       PT_GPR4,  PT_GPR5,  PT_GPR6,     PT_GPR7,
 774                                       PT_GPR8,  PT_GPR9,  PT_GPR10,    PT_GPR11,
 775                                       PT_GPR12, PT_GPR13, PT_GPR14,    PT_GPR15};
 776
 777                 if (upeek(pid, PT_PSWADDR, &pc) < 0)
 778                         return -1;
 779                 errno = 0;
 780                 opcode = ptrace(PTRACE_PEEKTEXT, pid, (char *)(pc-sizeof(long)), 0);
 781                 if (errno) {
 782                         perror("peektext(pc-oneword)");
 783                         return -1;
 784                 }
 785
 786                 /*
 787                  *  We have to check if the SVC got executed directly or via an
 788                  *  EXECUTE instruction. In case of EXECUTE it is necessary to do
 789                  *  instruction decoding to derive the system call number.
 790                  *  Unfortunately the opcode sizes of EXECUTE and SVC are differently,
 791                  *  so that this doesn't work if a SVC opcode is part of an EXECUTE
 792                  *  opcode. Since there is no way to find out the opcode size this
 793                  *  is the best we can do...
 794                  */
 795
 796                 if ((opcode & 0xff00) == 0x0a00) {
 797                         /* SVC opcode */
 798                         scno = opcode & 0xff;
 799                 }
 800                 else {
 801                         /* SVC got executed by EXECUTE instruction */
 802
 803                         /*
 804                          *  Do instruction decoding of EXECUTE. If you really want to
 805                          *  understand this, read the Principles of Operations.
 806                          */
 807                         svc_addr = (void *) (opcode & 0xfff);
 808
 809                         tmp = 0;
 810                         offset_reg = (opcode & 0x000f0000) >> 16;
 811                         if (offset_reg && (upeek(pid, gpr_offset[offset_reg], &tmp) < 0))
 812                                 return -1;
 813                         svc_addr += tmp;
 814
 815                         tmp = 0;
 816                         offset_reg = (opcode & 0x0000f000) >> 12;
 817                         if (offset_reg && (upeek(pid, gpr_offset[offset_reg], &tmp) < 0))
 818                                 return -1;
 819                         svc_addr += tmp;
 820
 821                         scno = ptrace(PTRACE_PEEKTEXT, pid, svc_addr, 0);
 822                         if (errno)
 823                                 return -1;
 824 #if defined(S390X)
 825                         scno >>= 48;
 826 #else
 827                         scno >>= 16;
 828 #endif
 829                         tmp = 0;
 830                         offset_reg = (opcode & 0x00f00000) >> 20;
 831                         if (offset_reg && (upeek(pid, gpr_offset[offset_reg], &tmp) < 0))
 832                                 return -1;
 833
 834                         scno = (scno | tmp) & 0xff;
 835                 }
 836         }
 837 #elif defined (POWERPC)
 838         if (upeek(pid, sizeof(unsigned long)*PT_R0, &scno) < 0)
 839                 return -1;
 840         if (!(tcp->flags & TCB_INSYSCALL)) {
 841                 /* Check if we return from execve. */
 842                 if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) {
 843                         tcp->flags &= ~TCB_WAITEXECVE;
 844                         return 0;
 845                 }
 846         }
 847 #elif defined (I386)
 848         if (upeek(pid, 4*ORIG_EAX, &scno) < 0)
 849                 return -1;
 850 #elif defined (X86_64)
 851         if (upeek(pid, 8*ORIG_RAX, &scno) < 0)
 852                 return -1;
 853
 854         if (!(tcp->flags & TCB_INSYSCALL)) {
 855                 static int currpers=-1;
 856                 long val;
 857
 858                 /* Check CS register value. On x86-64 linux it is:
 859                  *      0x33    for long mode (64 bit)
 860                  *      0x23    for compatibility mode (32 bit)
 861                  * It takes only one ptrace and thus doesn't need
 862                  * to be cached.
 863                  */
 864                 if (upeek(pid, 8*CS, &val) < 0)
 865                         return -1;
 866                 switch(val)
 867                 {
 868                         case 0x23: currpers = 1; break;
 869                         case 0x33: currpers = 0; break;
 870                         default:
 871                                 fprintf(stderr, "Unknown value CS=0x%02X while "
 872                                          "detecting personality of process "
 873                                          "PID=%d\n", (int)val, pid);
 874                                 currpers = current_personality;
 875                                 break;
 876                 }
 877 #if 0
 878                 /* This version analyzes the opcode of a syscall instruction.
 879                  * (int 0x80 on i386 vs. syscall on x86-64)
 880                  * It works, but is too complicated.
 881                  */
 882                 unsigned long val, rip, i;
 883
 884                 if(upeek(pid, 8*RIP, &rip)<0)
 885                         perror("upeek(RIP)");
 886
 887                 /* sizeof(syscall) == sizeof(int 0x80) == 2 */
 888                 rip-=2;
 889                 errno = 0;
 890
 891                 call = ptrace(PTRACE_PEEKTEXT,pid,(char *)rip,0);
 892                 if (errno)
 893                         printf("ptrace_peektext failed: %s\n",
 894                                         strerror(errno));
 895                 switch (call & 0xffff)
 896                 {
 897                         /* x86-64: syscall = 0x0f 0x05 */
 898                         case 0x050f: currpers = 0; break;
 899                         /* i386: int 0x80 = 0xcd 0x80 */
 900                         case 0x80cd: currpers = 1; break;
 901                         default:
 902                                 currpers = current_personality;
 903                                 fprintf(stderr,
 904                                         "Unknown syscall opcode (0x%04X) while "
 905                                         "detecting personality of process "
 906                                         "PID=%d\n", (int)call, pid);
 907                                 break;
 908                 }
 909 #endif
 910                 if(currpers != current_personality)
 911                 {
 912                         char *names[]={"64 bit", "32 bit"};
 913                         set_personality(currpers);
 914                         printf("[ Process PID=%d runs in %s mode. ]\n",
 915                                         pid, names[current_personality]);
 916                 }
 917         }
 918 #elif defined(IA64)
 919 #       define IA64_PSR_IS      ((long)1 << 34)
 920         if (upeek (pid, PT_CR_IPSR, &psr) >= 0)
 921                 ia32 = (psr & IA64_PSR_IS) != 0;
 922         if (!(tcp->flags & TCB_INSYSCALL)) {
 923                 if (ia32) {
 924                         if (upeek(pid, PT_R1, &scno) < 0)       /* orig eax */
 925                                 return -1;
 926                 } else {
 927                         if (upeek (pid, PT_R15, &scno) < 0)
 928                                 return -1;
 929                 }
 930                 /* Check if we return from execve. */
 931                 if (tcp->flags & TCB_WAITEXECVE) {
 932                         tcp->flags &= ~TCB_WAITEXECVE;
 933                         return 0;
 934                 }
 935         } else {
 936                 /* syscall in progress */
 937                 if (upeek (pid, PT_R8, &r8) < 0)
 938                         return -1;
 939                 if (upeek (pid, PT_R10, &r10) < 0)
 940                         return -1;
 941         }
 942 #elif defined (ARM)
 943         /*
 944          * Read complete register set in one go.
 945          */
 946         if (ptrace(PTRACE_GETREGS, pid, NULL, (void *)&regs) == -1)
 947                 return -1;
 948
 949         /*
 950          * We only need to grab the syscall number on syscall entry.
 951          */
 952         if (regs.ARM_ip == 0) {
 953                 /*
 954                  * Note: we only deal with only 32-bit CPUs here.
 955                  */
 956                 if (regs.ARM_cpsr & 0x20) {
 957                         /*
 958                          * Get the Thumb-mode system call number
 959                          */
 960                         scno = regs.ARM_r7;
 961                 } else {
 962                         /*
 963                          * Get the ARM-mode system call number
 964                          */
 965                         errno = 0;
 966                         scno = ptrace(PTRACE_PEEKTEXT, pid, (void *)(regs.ARM_pc - 4), NULL);
 967                         if (errno)
 968                                 return -1;
 969
 970                         if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) {
 971                                 tcp->flags &= ~TCB_WAITEXECVE;
 972                                 return 0;
 973                         }
 974
 975                         if ((scno & 0x0ff00000) != 0x0f900000) {
 976                                 fprintf(stderr, "syscall: unknown syscall trap 0x%08lx\n",
 977                                         scno);
 978                                 return -1;
 979                         }
 980
 981                         /*
 982                          * Fixup the syscall number
 983                          */
 984                         scno &= 0x000fffff;
 985                 }
 986
 987                 if (tcp->flags & TCB_INSYSCALL) {
 988                         fprintf(stderr, "pid %d stray syscall entry\n", tcp->pid);
 989                         tcp->flags &= ~TCB_INSYSCALL;
 990                 }
 991         } else {
 992                 if (!(tcp->flags & TCB_INSYSCALL)) {
 993                         fprintf(stderr, "pid %d stray syscall exit\n", tcp->pid);
 994                         tcp->flags |= TCB_INSYSCALL;
 995                 }
 996         }
 997 #elif defined (M68K)
 998         if (upeek(pid, 4*PT_ORIG_D0, &scno) < 0)
 999                 return -1;
1000 #elif defined (MIPS)
1001         if (upeek(pid, REG_A3, &a3) < 0)
1002                 return -1;
1003
1004         if(!(tcp->flags & TCB_INSYSCALL)) {
1005                 if (upeek(pid, REG_V0, &scno) < 0)
1006                         return -1;
1007
1008                 if (scno < 0 || scno > nsyscalls) {
1009                         if(a3 == 0 || a3 == -1) {
1010                                 if(debug)
1011                                         fprintf (stderr, "stray syscall exit: v0 = %ld\n", scno);
1012                                 return 0;
1013                         }
1014                 }
1015         } else {
1016                 if (upeek(pid, REG_V0, &r2) < 0)
1017                         return -1;
1018         }
1019 #elif defined (ALPHA)
1020         if (upeek(pid, REG_A3, &a3) < 0)
1021                 return -1;
1022
1023         if (!(tcp->flags & TCB_INSYSCALL)) {
1024                 if (upeek(pid, REG_R0, &scno) < 0)
1025                         return -1;
1026
1027                 /* Check if we return from execve. */
1028                 if (scno == 0 && tcp->flags & TCB_WAITEXECVE) {
1029                         tcp->flags &= ~TCB_WAITEXECVE;
1030                         return 0;
1031                 }
1032
1033                 /*
1034                  * Do some sanity checks to figure out if it's
1035                  * really a syscall entry
1036                  */
1037                 if (scno < 0 || scno > nsyscalls) {
1038                         if (a3 == 0 || a3 == -1) {
1039                                 if (debug)
1040                                         fprintf (stderr, "stray syscall exit: r0 = %ld\n", scno);
1041                                 return 0;
1042                         }
1043                 }
1044         }
1045         else {
1046                 if (upeek(pid, REG_R0, &r0) < 0)
1047                         return -1;
1048         }
1049 #elif defined (SPARC)
1050         /* Everything we need is in the current register set. */
1051         if (ptrace(PTRACE_GETREGS,pid,(char *)&regs,0) < 0)
1052                 return -1;
1053
1054         /* If we are entering, then disassemble the syscall trap. */
1055         if (!(tcp->flags & TCB_INSYSCALL)) {
1056                 /* Retrieve the syscall trap instruction. */
1057                 errno = 0;
1058                 trap = ptrace(PTRACE_PEEKTEXT,pid,(char *)regs.r_pc,0);
1059                 if (errno)
1060                         return -1;
1061
1062                 /* Disassemble the trap to see what personality to use. */
1063                 switch (trap) {
1064                 case 0x91d02010:
1065                         /* Linux/SPARC syscall trap. */
1066                         set_personality(0);
1067                         break;
1068                 case 0x91d0206d:
1069                         /* Linux/SPARC64 syscall trap. */
1070                         fprintf(stderr,"syscall: Linux/SPARC64 not supported yet\n");
1071                         return -1;
1072                 case 0x91d02000:
1073                         /* SunOS syscall trap. (pers 1) */
1074                         fprintf(stderr,"syscall: SunOS no support\n");
1075                         return -1;
1076                 case 0x91d02008:
1077                         /* Solaris 2.x syscall trap. (per 2) */
1078                         set_personality(1);
1079                         break;
1080                 case 0x91d02009:
1081                         /* NetBSD/FreeBSD syscall trap. */
1082                         fprintf(stderr,"syscall: NetBSD/FreeBSD not supported\n");
1083                         return -1;
1084                 case 0x91d02027:
1085                         /* Solaris 2.x gettimeofday */
1086                         set_personality(1);
1087                         break;
1088                 default:
1089                         /* Unknown syscall trap. */
1090                         if(tcp->flags & TCB_WAITEXECVE) {
1091                                 tcp->flags &= ~TCB_WAITEXECVE;
1092                                 return 0;
1093                         }
1094                         fprintf(stderr,"syscall: unknown syscall trap %08x %08x\n", trap, regs.r_pc);
1095                         return -1;
1096                 }
1097
1098                 /* Extract the system call number from the registers. */
1099                 if (trap == 0x91d02027)
1100                         scno = 156;
1101                 else
1102                         scno = regs.r_g1;
1103                 if (scno == 0) {
1104                         scno = regs.r_o0;
1105                         memmove (&regs.r_o0, &regs.r_o1, 7*sizeof(regs.r_o0));
1106                 }
1107         }
1108 #elif defined(HPPA)
1109         if (upeek(pid, PT_GR20, &scno) < 0)
1110                 return -1;
1111         if (!(tcp->flags & TCB_INSYSCALL)) {
1112                 /* Check if we return from execve. */
1113                 if ((tcp->flags & TCB_WAITEXECVE)) {
1114                         tcp->flags &= ~TCB_WAITEXECVE;
1115                         return 0;
1116                 }
1117         }
1118 #elif defined(SH)
1119        /*
1120         * In the new syscall ABI, the system call number is in R3.
1121         */
1122        if (upeek(pid, 4*(REG_REG0+3), &scno) < 0)
1123                return -1;
1124
1125        if (scno < 0) {
1126            /* Odd as it may seem, a glibc bug has been known to cause
1127               glibc to issue bogus negative syscall numbers.  So for
1128               our purposes, make strace print what it *should* have been */
1129            long correct_scno = (scno & 0xff);
1130            if (debug)
1131                fprintf(stderr,
1132                    "Detected glibc bug: bogus system call number = %ld, "
1133                    "correcting to %ld\n",
1134                    scno,
1135                    correct_scno);
1136            scno = correct_scno;
1137        }
1138
1139
1140        if (!(tcp->flags & TCB_INSYSCALL)) {
1141                /* Check if we return from execve. */
1142                if (scno == 0 && tcp->flags & TCB_WAITEXECVE) {
1143                        tcp->flags &= ~TCB_WAITEXECVE;
1144                        return 0;
1145                }
1146        }
1147 #elif defined(SH64)
1148         if (upeek(pid, REG_SYSCALL, &scno) < 0)
1149                 return -1;
1150         scno &= 0xFFFF;
1151
1152         if (!(tcp->flags & TCB_INSYSCALL)) {
1153                 /* Check if we return from execve. */
1154                 if (tcp->flags & TCB_WAITEXECVE) {
1155                         tcp->flags &= ~TCB_WAITEXECVE;
1156                         return 0;
1157                 }
1158         }
1159 #endif /* SH64 */
1160 #endif /* LINUX */
1161 #ifdef SUNOS4
1162         if (upeek(pid, uoff(u_arg[7]), &scno) < 0)
1163                 return -1;
1164 #elif defined(SH)
1165         /* new syscall ABI returns result in R0 */
1166         if (upeek(pid, 4*REG_REG0, (long *)&r0) < 0)
1167                 return -1;
1168 #elif defined(SH64)
1169         /* ABI defines result returned in r9 */
1170         if (upeek(pid, REG_GENERAL(9), (long *)&r9) < 0)
1171                 return -1;
1172
1173 #endif
1174 #ifdef USE_PROCFS
1175 #ifdef HAVE_PR_SYSCALL
1176         scno = tcp->status.PR_SYSCALL;
1177 #else /* !HAVE_PR_SYSCALL */
1178 #ifndef FREEBSD
1179         scno = tcp->status.PR_WHAT;
1180 #else /* FREEBSD */
1181         if (pread(tcp->pfd_reg, &regs, sizeof(regs), 0) < 0) {
1182                 perror("pread");
1183                 return -1;
1184         }
1185         switch (regs.r_eax) {
1186         case SYS_syscall:
1187         case SYS___syscall:
1188                 pread(tcp->pfd, &scno, sizeof(scno), regs.r_esp + sizeof(int));
1189                 break;
1190         default:
1191                 scno = regs.r_eax;
1192                 break;
1193         }
1194 #endif /* FREEBSD */
1195 #endif /* !HAVE_PR_SYSCALL */
1196 #endif /* USE_PROCFS */
1197         if (!(tcp->flags & TCB_INSYSCALL))
1198                 tcp->scno = scno;
1199         return 1;
1200 }
1201
1202
1203 int
1204 syscall_fixup(tcp)
1205 struct tcb *tcp;
1206 {
1207 #ifndef USE_PROCFS
1208         int pid = tcp->pid;
1209 #else /* USE_PROCFS */
1210         int scno = tcp->scno;
1211
1212         if (!(tcp->flags & TCB_INSYSCALL)) {
1213                 if (tcp->status.PR_WHY != PR_SYSENTRY) {
1214                         if (
1215                             scno == SYS_fork
1216 #ifdef SYS_vfork
1217                             || scno == SYS_vfork
1218 #endif /* SYS_vfork */
1219 #ifdef SYS_fork1
1220                             || scno == SYS_fork1
1221 #endif /* SYS_fork1 */
1222 #ifdef SYS_forkall
1223                             || scno == SYS_forkall
1224 #endif /* SYS_forkall */
1225 #ifdef SYS_rfork1
1226                             || scno == SYS_rfork1
1227 #endif /* SYS_fork1 */
1228 #ifdef SYS_rforkall
1229                             || scno == SYS_rforkall
1230 #endif /* SYS_rforkall */
1231                             ) {
1232                                 /* We are returning in the child, fake it. */
1233                                 tcp->status.PR_WHY = PR_SYSENTRY;
1234                                 trace_syscall(tcp);
1235                                 tcp->status.PR_WHY = PR_SYSEXIT;
1236                         }
1237                         else {
1238                                 fprintf(stderr, "syscall: missing entry\n");
1239                                 tcp->flags |= TCB_INSYSCALL;
1240                         }
1241                 }
1242         }
1243         else {
1244                 if (tcp->status.PR_WHY != PR_SYSEXIT) {
1245                         fprintf(stderr, "syscall: missing exit\n");
1246                         tcp->flags &= ~TCB_INSYSCALL;
1247                 }
1248         }
1249 #endif /* USE_PROCFS */
1250 #ifdef SUNOS4
1251         if (!(tcp->flags & TCB_INSYSCALL)) {
1252                 if (scno == 0) {
1253                         fprintf(stderr, "syscall: missing entry\n");
1254                         tcp->flags |= TCB_INSYSCALL;
1255                 }
1256         }
1257         else {
1258                 if (scno != 0) {
1259                         if (debug) {
1260                                 /*
1261                                  * This happens when a signal handler
1262                                  * for a signal which interrupted a
1263                                  * a system call makes another system call.
1264                                  */
1265                                 fprintf(stderr, "syscall: missing exit\n");
1266                         }
1267                         tcp->flags &= ~TCB_INSYSCALL;
1268                 }
1269         }
1270 #endif /* SUNOS4 */
1271 #ifdef LINUX
1272 #if defined (I386)
1273         if (upeek(pid, 4*EAX, &eax) < 0)
1274                 return -1;
1275         if (eax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
1276                 if (debug)
1277                         fprintf(stderr, "stray syscall exit: eax = %ld\n", eax);
1278                 return 0;
1279         }
1280 #elif defined (X86_64)
1281         if (upeek(pid, 8*RAX, &rax) < 0)
1282                 return -1;
1283         if (rax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
1284                 if (debug)
1285                         fprintf(stderr, "stray syscall exit: rax = %ld\n", rax);
1286                 return 0;
1287         }
1288 #elif defined (S390) || defined (S390X)
1289         if (upeek(pid, PT_GPR2, &gpr2) < 0)
1290                 return -1;
1291         if (syscall_mode != -ENOSYS)
1292                 syscall_mode = tcp->scno;
1293         if (gpr2 != syscall_mode && !(tcp->flags & TCB_INSYSCALL)) {
1294                 if (debug)
1295                         fprintf(stderr, "stray syscall exit: gpr2 = %ld\n", gpr2);
1296                 return 0;
1297         }
1298         else if (((tcp->flags & (TCB_INSYSCALL|TCB_WAITEXECVE))
1299                   == (TCB_INSYSCALL|TCB_WAITEXECVE))
1300                  && (gpr2 == -ENOSYS || gpr2 == tcp->scno)) {
1301                 /*
1302                  * Fake a return value of zero.  We leave the TCB_WAITEXECVE
1303                  * flag set for the post-execve SIGTRAP to see and reset.
1304                  */
1305                 gpr2 = 0;
1306         }
1307 #elif defined (POWERPC)
1308 # define SO_MASK 0x10000000
1309         if (upeek(pid, sizeof(unsigned long)*PT_CCR, &flags) < 0)
1310                 return -1;
1311         if (upeek(pid, sizeof(unsigned long)*PT_R3, &result) < 0)
1312                 return -1;
1313         if (flags & SO_MASK)
1314                 result = -result;
1315 #elif defined (M68K)
1316         if (upeek(pid, 4*PT_D0, &d0) < 0)
1317                 return -1;
1318         if (d0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
1319                 if (debug)
1320                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", d0);
1321                 return 0;
1322         }
1323 #elif defined (ARM)
1324         /*
1325          * Nothing required
1326          */
1327 #elif defined (HPPA)
1328         if (upeek(pid, PT_GR28, &r28) < 0)
1329                 return -1;
1330 #elif defined(IA64)
1331         if (upeek(pid, PT_R10, &r10) < 0)
1332                 return -1;
1333         if (upeek(pid, PT_R8, &r8) < 0)
1334                 return -1;
1335         if (ia32 && r8 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
1336                 if (debug)
1337                         fprintf(stderr, "stray syscall exit: r8 = %ld\n", r8);
1338                 return 0;
1339         }
1340 #endif
1341 #endif /* LINUX */
1342         return 1;
1343 }
1344
1345 int
1346 get_error(tcp)
1347 struct tcb *tcp;
1348 {
1349         int u_error = 0;
1350 #ifdef LINUX
1351 #if defined(S390) || defined(S390X)
1352                 if (gpr2 && (unsigned) -gpr2 < nerrnos) {
1353                         tcp->u_rval = -1;
1354                         u_error = -gpr2;
1355                 }
1356                 else {
1357                         tcp->u_rval = gpr2;
1358                         u_error = 0;
1359                 }
1360 #else /* !S390 && !S390X */
1361 #ifdef I386
1362                 if (eax < 0 && -eax < nerrnos) {
1363                         tcp->u_rval = -1;
1364                         u_error = -eax;
1365                 }
1366                 else {
1367                         tcp->u_rval = eax;
1368                         u_error = 0;
1369                 }
1370 #else /* !I386 */
1371 #ifdef X86_64
1372                 if (rax < 0 && -rax < nerrnos) {
1373                         tcp->u_rval = -1;
1374                         u_error = -rax;
1375                 }
1376                 else {
1377                         tcp->u_rval = rax;
1378                         u_error = 0;
1379                 }
1380 #else
1381 #ifdef IA64
1382                 if (ia32) {
1383                         int err;
1384
1385                         err = (int)r8;
1386                         if (err < 0 && -err < nerrnos) {
1387                                 tcp->u_rval = -1;
1388                                 u_error = -err;
1389                         }
1390                         else {
1391                                 tcp->u_rval = err;
1392                                 u_error = 0;
1393                         }
1394                 } else {
1395                         if (r10) {
1396                                 tcp->u_rval = -1;
1397                                 u_error = r8;
1398                         } else {
1399                                 tcp->u_rval = r8;
1400                                 u_error = 0;
1401                         }
1402                 }
1403 #else /* !IA64 */
1404 #ifdef MIPS
1405                 if (a3) {
1406                         tcp->u_rval = -1;
1407                         u_error = r2;
1408                 } else {
1409                         tcp->u_rval = r2;
1410                         u_error = 0;
1411                 }
1412 #else
1413 #ifdef POWERPC
1414                 if (result && (unsigned) -result < nerrnos) {
1415                         tcp->u_rval = -1;
1416                         u_error = -result;
1417                 }
1418                 else {
1419                         tcp->u_rval = result;
1420                         u_error = 0;
1421                 }
1422 #else /* !POWERPC */
1423 #ifdef M68K
1424                 if (d0 && (unsigned) -d0 < nerrnos) {
1425                         tcp->u_rval = -1;
1426                         u_error = -d0;
1427                 }
1428                 else {
1429                         tcp->u_rval = d0;
1430                         u_error = 0;
1431                 }
1432 #else /* !M68K */
1433 #ifdef ARM
1434                 if (regs.ARM_r0 && (unsigned) -regs.ARM_r0 < nerrnos) {
1435                         tcp->u_rval = -1;
1436                         u_error = -regs.ARM_r0;
1437                 }
1438                 else {
1439                         tcp->u_rval = regs.ARM_r0;
1440                         u_error = 0;
1441                 }
1442 #else /* !ARM */
1443 #ifdef ALPHA
1444                 if (a3) {
1445                         tcp->u_rval = -1;
1446                         u_error = r0;
1447                 }
1448                 else {
1449                         tcp->u_rval = r0;
1450                         u_error = 0;
1451                 }
1452 #else /* !ALPHA */
1453 #ifdef SPARC
1454                 if (regs.r_psr & PSR_C) {
1455                         tcp->u_rval = -1;
1456                         u_error = regs.r_o0;
1457                 }
1458                 else {
1459                         tcp->u_rval = regs.r_o0;
1460                         u_error = 0;
1461                 }
1462 #else /* !SPARC */
1463 #ifdef HPPA
1464                 if (r28 && (unsigned) -r28 < nerrnos) {
1465                         tcp->u_rval = -1;
1466                         u_error = -r28;
1467                 }
1468                 else {
1469                         tcp->u_rval = r28;
1470                         u_error = 0;
1471                 }
1472 #else
1473 #ifdef SH
1474                /* interpret R0 as return value or error number */
1475                if (r0 && (unsigned) -r0 < nerrnos) {
1476                        tcp->u_rval = -1;
1477                        u_error = -r0;
1478                }
1479                else {
1480                        tcp->u_rval = r0;
1481                        u_error = 0;
1482                }
1483 #else
1484 #ifdef SH64
1485                 /* interpret result as return value or error number */
1486                 if (r9 && (unsigned) -r9 < nerrnos) {
1487                         tcp->u_rval = -1;
1488                         u_error = -r9;
1489                 }
1490                 else {
1491                         tcp->u_rval = r9;
1492                         u_error = 0;
1493                 }
1494 #endif /* SH64 */
1495 #endif /* SH */
1496 #endif /* HPPA */
1497 #endif /* SPARC */
1498 #endif /* ALPHA */
1499 #endif /* ARM */
1500 #endif /* M68K */
1501 #endif /* POWERPC */
1502 #endif /* MIPS */
1503 #endif /* IA64 */
1504 #endif /* X86_64 */
1505 #endif /* I386 */
1506 #endif /* S390 || S390X */
1507 #endif /* LINUX */
1508 #ifdef SUNOS4
1509                 /* get error code from user struct */
1510                 if (upeek(pid, uoff(u_error), &u_error) < 0)
1511                         return -1;
1512                 u_error >>= 24; /* u_error is a char */
1513
1514                 /* get system call return value */
1515                 if (upeek(pid, uoff(u_rval1), &tcp->u_rval) < 0)
1516                         return -1;
1517 #endif /* SUNOS4 */
1518 #ifdef SVR4
1519 #ifdef SPARC
1520                 /* Judicious guessing goes a long way. */
1521                 if (tcp->status.pr_reg[R_PSR] & 0x100000) {
1522                         tcp->u_rval = -1;
1523                         u_error = tcp->status.pr_reg[R_O0];
1524                 }
1525                 else {
1526                         tcp->u_rval = tcp->status.pr_reg[R_O0];
1527                         u_error = 0;
1528                 }
1529 #endif /* SPARC */
1530 #ifdef I386
1531                 /* Wanna know how to kill an hour single-stepping? */
1532                 if (tcp->status.PR_REG[EFL] & 0x1) {
1533                         tcp->u_rval = -1;
1534                         u_error = tcp->status.PR_REG[EAX];
1535                 }
1536                 else {
1537                         tcp->u_rval = tcp->status.PR_REG[EAX];
1538 #ifdef HAVE_LONG_LONG
1539                         tcp->u_lrval =
1540                                 ((unsigned long long) tcp->status.PR_REG[EDX] << 32) +
1541                                 tcp->status.PR_REG[EAX];
1542 #endif
1543                         u_error = 0;
1544                 }
1545 #endif /* I386 */
1546 #ifdef X86_64
1547                 /* Wanna know how to kill an hour single-stepping? */
1548                 if (tcp->status.PR_REG[EFLAGS] & 0x1) {
1549                         tcp->u_rval = -1;
1550                         u_error = tcp->status.PR_REG[RAX];
1551                 }
1552                 else {
1553                         tcp->u_rval = tcp->status.PR_REG[RAX];
1554                         u_error = 0;
1555                 }
1556 #endif /* X86_64 */
1557 #ifdef MIPS
1558                 if (tcp->status.pr_reg[CTX_A3]) {
1559                         tcp->u_rval = -1;
1560                         u_error = tcp->status.pr_reg[CTX_V0];
1561                 }
1562                 else {
1563                         tcp->u_rval = tcp->status.pr_reg[CTX_V0];
1564                         u_error = 0;
1565                 }
1566 #endif /* MIPS */
1567 #endif /* SVR4 */
1568 #ifdef FREEBSD
1569                 if (regs.r_eflags & PSL_C) {
1570                         tcp->u_rval = -1;
1571                         u_error = regs.r_eax;
1572                 } else {
1573                         tcp->u_rval = regs.r_eax;
1574                         tcp->u_lrval =
1575                           ((unsigned long long) regs.r_edx << 32) +  regs.r_eax;
1576                         u_error = 0;
1577                 }
1578 #endif /* FREEBSD */
1579         tcp->u_error = u_error;
1580         return 1;
1581 }
1582
1583 int
1584 force_result(tcp, error, rval)
1585         struct tcb *tcp;
1586         int error;
1587         long rval;
1588 {
1589 #ifdef LINUX
1590 #if defined(S390) || defined(S390X)
1591         gpr2 = error ? -error : rval;
1592         if (upeek(tcp->pid, PT_GPR2, &gpr2) < 0)
1593                 return -1;
1594         if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)PT_GPR2, gpr2) < 0)
1595                 return -1;
1596 #else /* !S390 && !S390X */
1597 #ifdef I386
1598         eax = error ? -error : rval;
1599         if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(EAX * 4), eax) < 0)
1600                 return -1;
1601 #else /* !I386 */
1602 #ifdef X86_64
1603         rax = error ? -error : rval;
1604         if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(RAX * 4), rax) < 0)
1605                 return -1;
1606 #else
1607 #ifdef IA64
1608         if (ia32) {
1609                 r8 = error ? -error : rval;
1610                 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R8), r8) < 0)
1611                         return -1;
1612         }
1613         else {
1614                 if (error) {
1615                         r8 = error;
1616                         r10 = -1;
1617                 }
1618                 else {
1619                         r8 = rval;
1620                         r10 = 0;
1621                 }
1622                 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R8), r8) < 0 ||
1623                     ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R10), r10) < 0)
1624                         return -1;
1625         }
1626 #else /* !IA64 */
1627 #ifdef MIPS
1628         if (error) {
1629                 r2 = error;
1630                 a3 = -1;
1631         }
1632         else {
1633                 r2 = rval;
1634                 a3 = 0;
1635         }
1636         if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_A3), a3) < 0 ||
1637             ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_V0), r2) < 0)
1638                 return -1;
1639 #else
1640 #ifdef POWERPC
1641         if (upeek(tcp->pid, sizeof(unsigned long)*PT_CCR, &flags) < 0)
1642                 return -1;
1643         if (error) {
1644                 flags |= SO_MASK;
1645                 result = error;
1646         }
1647         else {
1648                 flags &= ~SO_MASK;
1649                 result = rval;
1650         }
1651         if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(sizeof(unsigned long)*PT_CCR), flags) < 0 ||
1652             ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(sizeof(unsigned long)*PT_R3), result) < 0)
1653                 return -1;
1654 #else /* !POWERPC */
1655 #ifdef M68K
1656         d0 = error ? -error : rval;
1657         if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_D0), d0) < 0)
1658                 return -1;
1659 #else /* !M68K */
1660 #ifdef ARM
1661        regs.ARM_r0 = error ? -error : rval;
1662        if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*0), regs.ARM_r0) < 0)
1663                 return -1;
1664 #else /* !ARM */
1665 #ifdef ALPHA
1666         if (error) {
1667                 a3 = -1;
1668                 r0 = error;
1669         }
1670         else {
1671                 a3 = 0;
1672                 r0 = rval;
1673         }
1674         if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_A3), a3) < 0 ||
1675             ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_R0), r0) < 0)
1676                 return -1;
1677 #else /* !ALPHA */
1678 #ifdef SPARC
1679         if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)&regs, 0) < 0)
1680                 return -1;
1681         if (error) {
1682                 regs.r_psr |= PSR_C;
1683                 regs.r_o0 = error;
1684         }
1685         else {
1686                 regs.r_psr &= ~PSR_C;
1687                 regs.r_o0 = rval;
1688         }
1689         if (ptrace(PTRACE_SETREGS, tcp->pid, (char *)&regs, 0) < 0)
1690                 return -1;
1691 #else /* !SPARC */
1692 #ifdef HPPA
1693         r28 = error ? -error : rval;
1694         if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GR28), r28) < 0)
1695                 return -1;
1696 #else
1697 #ifdef SH
1698         r0 = error ? -error : rval;
1699         if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*REG_REG0), r0) < 0)
1700                 return -1;
1701 #else
1702 #ifdef SH64
1703         r9 = error ? -error : rval;
1704         if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)REG_GENERAL(9), r9) < 0)
1705                 return -1;
1706 #endif /* SH64 */
1707 #endif /* SH */
1708 #endif /* HPPA */
1709 #endif /* SPARC */
1710 #endif /* ALPHA */
1711 #endif /* ARM */
1712 #endif /* M68K */
1713 #endif /* POWERPC */
1714 #endif /* MIPS */
1715 #endif /* IA64 */
1716 #endif /* X86_64 */
1717 #endif /* I386 */
1718 #endif /* S390 || S390X */
1719 #endif /* LINUX */
1720 #ifdef SUNOS4
1721         if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)uoff(u_error),
1722                    error << 24) < 0 ||
1723             ptrace(PTRACE_POKEUSER, tcp->pid, (char*)uoff(u_rval1), rval) < 0)
1724                 return -1;
1725 #endif /* SUNOS4 */
1726 #ifdef SVR4
1727         /* XXX no clue */
1728         return -1;
1729 #endif /* SVR4 */
1730 #ifdef FREEBSD
1731         if (pread(tcp->pfd_reg, &regs, sizeof(regs), 0) < 0) {
1732                 perror("pread");
1733                 return -1;
1734         }
1735         if (error) {
1736                 regs.r_eflags |= PSL_C;
1737                 regs.r_eax = error;
1738         }
1739         else {
1740                 regs.r_eflags &= ~PSL_C;
1741                 regs.r_eax = rval;
1742         }
1743         if (pwrite(tcp->pfd_reg, &regs, sizeof(regs), 0) < 0) {
1744                 perror("pwrite");
1745                 return -1;
1746         }
1747 #endif /* FREEBSD */
1748
1749         /* All branches reach here on success (only).  */
1750         tcp->u_error = error;
1751         tcp->u_rval = rval;
1752         return 0;
1753 }
1754
1755 int syscall_enter(tcp)
1756 struct tcb *tcp;
1757 {
1758 #ifndef USE_PROCFS
1759         int pid = tcp->pid;
1760 #endif /* !USE_PROCFS */
1761 #ifdef LINUX
1762 #if defined(S390) || defined(S390X)
1763         {
1764                 int i;
1765                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1766                         tcp->u_nargs = sysent[tcp->scno].nargs;
1767                 else
1768                         tcp->u_nargs = MAX_ARGS;
1769                 for (i = 0; i < tcp->u_nargs; i++) {
1770                         if (upeek(pid,i==0 ? PT_ORIGGPR2:PT_GPR2+i*sizeof(long), &tcp->u_arg[i]) < 0)
1771                                 return -1;
1772                 }
1773         }
1774 #elif defined (ALPHA)
1775         {
1776                 int i;
1777                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1778                         tcp->u_nargs = sysent[tcp->scno].nargs;
1779                 else
1780                         tcp->u_nargs = MAX_ARGS;
1781                 for (i = 0; i < tcp->u_nargs; i++) {
1782                         /* WTA: if scno is out-of-bounds this will bomb. Add range-check
1783                          * for scno somewhere above here!
1784                          */
1785                         if (upeek(pid, REG_A0+i, &tcp->u_arg[i]) < 0)
1786                                 return -1;
1787                 }
1788         }
1789 #elif defined (IA64)
1790         {
1791                 if (!ia32) {
1792                         unsigned long *out0, *rbs_end, cfm, sof, sol, i;
1793                         /* be backwards compatible with kernel < 2.4.4... */
1794 #                       ifndef PT_RBS_END
1795 #                         define PT_RBS_END     PT_AR_BSP
1796 #                       endif
1797
1798                         if (upeek(pid, PT_RBS_END, (long *) &rbs_end) < 0)
1799                                 return -1;
1800                         if (upeek(pid, PT_CFM, (long *) &cfm) < 0)
1801                                 return -1;
1802
1803                         sof = (cfm >> 0) & 0x7f;
1804                         sol = (cfm >> 7) & 0x7f;
1805                         out0 = ia64_rse_skip_regs(rbs_end, -sof + sol);
1806
1807                         if (tcp->scno >= 0 && tcp->scno < nsyscalls
1808                             && sysent[tcp->scno].nargs != -1)
1809                                 tcp->u_nargs = sysent[tcp->scno].nargs;
1810                         else
1811                                 tcp->u_nargs = MAX_ARGS;
1812                         for (i = 0; i < tcp->u_nargs; ++i) {
1813                                 if (umoven(tcp, (unsigned long) ia64_rse_skip_regs(out0, i),
1814                                            sizeof(long), (char *) &tcp->u_arg[i]) < 0)
1815                                         return -1;
1816                         }
1817                 } else {
1818                         int i;
1819
1820                         if (/* EBX = out0 */
1821                             upeek(pid, PT_R11, (long *) &tcp->u_arg[0]) < 0
1822                             /* ECX = out1 */
1823                             || upeek(pid, PT_R9,  (long *) &tcp->u_arg[1]) < 0
1824                             /* EDX = out2 */
1825                             || upeek(pid, PT_R10, (long *) &tcp->u_arg[2]) < 0
1826                             /* ESI = out3 */
1827                             || upeek(pid, PT_R14, (long *) &tcp->u_arg[3]) < 0
1828                             /* EDI = out4 */
1829                             || upeek(pid, PT_R15, (long *) &tcp->u_arg[4]) < 0
1830                             /* EBP = out5 */
1831                             || upeek(pid, PT_R13, (long *) &tcp->u_arg[5]) < 0)
1832                                 return -1;
1833
1834                         for (i = 0; i < 6; ++i)
1835                                 /* truncate away IVE sign-extension */
1836                                 tcp->u_arg[i] &= 0xffffffff;
1837
1838                         if (tcp->scno >= 0 && tcp->scno < nsyscalls
1839                             && sysent[tcp->scno].nargs != -1)
1840                                 tcp->u_nargs = sysent[tcp->scno].nargs;
1841                         else
1842                                 tcp->u_nargs = 5;
1843                 }
1844         }
1845 #elif defined (MIPS)
1846         {
1847                 long sp;
1848                 int i, nargs;
1849
1850                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1851                         nargs = tcp->u_nargs = sysent[tcp->scno].nargs;
1852                 else
1853                         nargs = tcp->u_nargs = MAX_ARGS;
1854                 if(nargs > 4) {
1855                         if(upeek(pid, REG_SP, &sp) < 0)
1856                                 return -1;
1857                         for(i = 0; i < 4; i++) {
1858                                 if (upeek(pid, REG_A0 + i, &tcp->u_arg[i])<0)
1859                                         return -1;
1860                         }
1861                         umoven(tcp, sp+16, (nargs-4) * sizeof(tcp->u_arg[0]),
1862                                (char *)(tcp->u_arg + 4));
1863                 } else {
1864                         for(i = 0; i < nargs; i++) {
1865                                 if (upeek(pid, REG_A0 + i, &tcp->u_arg[i]) < 0)
1866                                         return -1;
1867                         }
1868                 }
1869         }
1870 #elif defined (POWERPC)
1871 #ifndef PT_ORIG_R3
1872 #define PT_ORIG_R3 34
1873 #endif
1874         {
1875                 int i;
1876                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1877                         tcp->u_nargs = sysent[tcp->scno].nargs;
1878                 else
1879                         tcp->u_nargs = MAX_ARGS;
1880                 for (i = 0; i < tcp->u_nargs; i++) {
1881                         if (upeek(pid, (i==0) ?
1882                                 (sizeof(unsigned long)*PT_ORIG_R3) :
1883                                 ((i+PT_R3)*sizeof(unsigned long)),
1884                                         &tcp->u_arg[i]) < 0)
1885                                 return -1;
1886                 }
1887         }
1888 #elif defined (SPARC)
1889         {
1890                 int i;
1891
1892                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1893                         tcp->u_nargs = sysent[tcp->scno].nargs;
1894                 else
1895                         tcp->u_nargs = MAX_ARGS;
1896                 for (i = 0; i < tcp->u_nargs; i++)
1897                         tcp->u_arg[i] = *((&regs.r_o0) + i);
1898         }
1899 #elif defined (HPPA)
1900         {
1901                 int i;
1902
1903                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1904                         tcp->u_nargs = sysent[tcp->scno].nargs;
1905                 else
1906                         tcp->u_nargs = MAX_ARGS;
1907                 for (i = 0; i < tcp->u_nargs; i++) {
1908                         if (upeek(pid, PT_GR26-4*i, &tcp->u_arg[i]) < 0)
1909                                 return -1;
1910                 }
1911         }
1912 #elif defined(ARM)
1913         {
1914                 int i;
1915
1916                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1917                         tcp->u_nargs = sysent[tcp->scno].nargs;
1918                 else
1919                         tcp->u_nargs = MAX_ARGS;
1920                 for (i = 0; i < tcp->u_nargs; i++)
1921                         tcp->u_arg[i] = regs.uregs[i];
1922         }
1923 #elif defined(SH)
1924        {
1925                int i;
1926                static int syscall_regs[] = {
1927                    REG_REG0+4, REG_REG0+5, REG_REG0+6, REG_REG0+7,
1928                    REG_REG0, REG_REG0+1, REG_REG0+2
1929                    };
1930
1931                tcp->u_nargs = sysent[tcp->scno].nargs;
1932                for (i = 0; i < tcp->u_nargs; i++) {
1933                        if (upeek(pid, 4*syscall_regs[i], &tcp->u_arg[i]) < 0)
1934                                return -1;
1935                }
1936         }
1937 #elif defined(SH64)
1938         {
1939                 int i;
1940                 /* Registers used by SH5 Linux system calls for parameters */
1941                 static int syscall_regs[] = { 2, 3, 4, 5, 6, 7 };
1942
1943                 /*
1944                  * TODO: should also check that the number of arguments encoded
1945                  *       in the trap number matches the number strace expects.
1946                  */
1947                 /*
1948                     assert(sysent[tcp->scno].nargs <
1949                         sizeof(syscall_regs)/sizeof(syscall_regs[0]));
1950                  */
1951
1952                 tcp->u_nargs = sysent[tcp->scno].nargs;
1953                 for (i = 0; i < tcp->u_nargs; i++) {
1954                         if (upeek(pid, REG_GENERAL(syscall_regs[i]), &tcp->u_arg[i]) < 0)
1955                                 return -1;
1956                 }
1957         }
1958
1959 #elif defined(X86_64)
1960         {
1961                 int i;
1962                 static int argreg[SUPPORTED_PERSONALITIES][MAX_ARGS] = {
1963                         {RDI,RSI,RDX,R10,R8,R9},        /* x86-64 ABI */
1964                         {RBX,RCX,RDX,RDX,RSI,RDI,RBP}   /* i386 ABI */
1965                 };
1966
1967                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1968                         tcp->u_nargs = sysent[tcp->scno].nargs;
1969                 else
1970                         tcp->u_nargs = MAX_ARGS;
1971                 for (i = 0; i < tcp->u_nargs; i++) {
1972                         if (upeek(pid, argreg[current_personality][i]*8, &tcp->u_arg[i]) < 0)
1973                                 return -1;
1974                 }
1975         }
1976 #else /* Other architecture (like i386) (32bits specific) */
1977         {
1978                 int i;
1979                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1980                         tcp->u_nargs = sysent[tcp->scno].nargs;
1981                 else
1982                         tcp->u_nargs = MAX_ARGS;
1983                 for (i = 0; i < tcp->u_nargs; i++) {
1984                         if (upeek(pid, i*4, &tcp->u_arg[i]) < 0)
1985                                 return -1;
1986                 }
1987         }
1988 #endif
1989 #endif /* LINUX */
1990 #ifdef SUNOS4
1991         {
1992                 int i;
1993                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1994                         tcp->u_nargs = sysent[tcp->scno].nargs;
1995                 else
1996                         tcp->u_nargs = MAX_ARGS;
1997                 for (i = 0; i < tcp->u_nargs; i++) {
1998                         struct user *u;
1999
2000                         if (upeek(pid, uoff(u_arg[0]) +
2001                             (i*sizeof(u->u_arg[0])), &tcp->u_arg[i]) < 0)
2002                                 return -1;
2003                 }
2004         }
2005 #endif /* SUNOS4 */
2006 #ifdef SVR4
2007 #ifdef MIPS
2008         /*
2009          * SGI is broken: even though it has pr_sysarg, it doesn't
2010          * set them on system call entry.  Get a clue.
2011          */
2012         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
2013                 tcp->u_nargs = sysent[tcp->scno].nargs;
2014         else
2015                 tcp->u_nargs = tcp->status.pr_nsysarg;
2016         if (tcp->u_nargs > 4) {
2017                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
2018                         4*sizeof(tcp->u_arg[0]));
2019                 umoven(tcp, tcp->status.pr_reg[CTX_SP] + 16,
2020                         (tcp->u_nargs - 4)*sizeof(tcp->u_arg[0]), (char *) (tcp->u_arg + 4));
2021         }
2022         else {
2023                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
2024                         tcp->u_nargs*sizeof(tcp->u_arg[0]));
2025         }
2026 #elif UNIXWARE >= 2
2027         /*
2028          * Like SGI, UnixWare doesn't set pr_sysarg until system call exit
2029          */
2030         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
2031                 tcp->u_nargs = sysent[tcp->scno].nargs;
2032         else
2033                 tcp->u_nargs = tcp->status.pr_lwp.pr_nsysarg;
2034         umoven(tcp, tcp->status.PR_REG[UESP] + 4,
2035                 tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
2036 #elif defined (HAVE_PR_SYSCALL)
2037         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
2038                 tcp->u_nargs = sysent[tcp->scno].nargs;
2039         else
2040                 tcp->u_nargs = tcp->status.pr_nsysarg;
2041         {
2042                 int i;
2043                 for (i = 0; i < tcp->u_nargs; i++)
2044                         tcp->u_arg[i] = tcp->status.pr_sysarg[i];
2045         }
2046 #elif defined (I386)
2047         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
2048                 tcp->u_nargs = sysent[tcp->scno].nargs;
2049         else
2050                 tcp->u_nargs = 5;
2051         umoven(tcp, tcp->status.PR_REG[UESP] + 4,
2052                 tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
2053 #else
2054         I DONT KNOW WHAT TO DO
2055 #endif /* !HAVE_PR_SYSCALL */
2056 #endif /* SVR4 */
2057 #ifdef FREEBSD
2058         if (tcp->scno >= 0 && tcp->scno < nsyscalls &&
2059             sysent[tcp->scno].nargs > tcp->status.val)
2060                 tcp->u_nargs = sysent[tcp->scno].nargs;
2061         else
2062                 tcp->u_nargs = tcp->status.val;
2063         if (tcp->u_nargs < 0)
2064                 tcp->u_nargs = 0;
2065         if (tcp->u_nargs > MAX_ARGS)
2066                 tcp->u_nargs = MAX_ARGS;
2067         switch(regs.r_eax) {
2068         case SYS___syscall:
2069                 pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
2070                       regs.r_esp + sizeof(int) + sizeof(quad_t));
2071           break;
2072         case SYS_syscall:
2073                 pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
2074                       regs.r_esp + 2 * sizeof(int));
2075           break;
2076         default:
2077                 pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
2078                       regs.r_esp + sizeof(int));
2079           break;
2080         }
2081 #endif /* FREEBSD */
2082         return 1;
2083 }
2084
2085 int
2086 trace_syscall(tcp)
2087 struct tcb *tcp;
2088 {
2089         int sys_res;
2090         struct timeval tv;
2091         int res;
2092
2093         /* Measure the exit time as early as possible to avoid errors. */
2094         if (dtime && (tcp->flags & TCB_INSYSCALL))
2095                 gettimeofday(&tv, NULL);
2096
2097         res = get_scno(tcp);
2098         if (res != 1)
2099                 return res;
2100
2101         res = syscall_fixup(tcp);
2102         if (res != 1)
2103                 return res;
2104
2105         if (tcp->flags & TCB_INSYSCALL) {
2106                 long u_error;
2107                 res = get_error(tcp);
2108                 if (res != 1)
2109                         return res;
2110
2111                 internal_syscall(tcp);
2112                 if (tcp->scno >= 0 && tcp->scno < nsyscalls &&
2113                     !(qual_flags[tcp->scno] & QUAL_TRACE)) {
2114                         tcp->flags &= ~TCB_INSYSCALL;
2115                         return 0;
2116                 }
2117
2118                 if (tcp->flags & TCB_REPRINT) {
2119                         printleader(tcp);
2120                         tprintf("<... ");
2121                         if (tcp->scno >= nsyscalls || tcp->scno < 0)
2122                                 tprintf("syscall_%lu", tcp->scno);
2123                         else
2124                                 tprintf("%s", sysent[tcp->scno].sys_name);
2125                         tprintf(" resumed> ");
2126                 }
2127
2128                 if (cflag && tcp->scno < nsyscalls && tcp->scno >= 0) {
2129                         call_count[tcp->scno]++;
2130                         if (tcp->u_error)
2131                                 error_count[tcp->scno]++;
2132                         tv_sub(&tv, &tv, &tcp->etime);
2133 #ifdef LINUX
2134                         if (tv_cmp(&tv, &tcp->dtime) > 0) {
2135                                 static struct timeval one_tick =
2136                                         { 0, 1000000 / HZ };
2137
2138                                 if (tv_nz(&tcp->dtime))
2139                                         tv = tcp->dtime;
2140                                 else if (tv_cmp(&tv, &one_tick) > 0) {
2141                                         if (tv_cmp(&shortest, &one_tick) < 0)
2142                                                 tv = shortest;
2143                                         else
2144                                                 tv = one_tick;
2145                                 }
2146                         }
2147 #endif /* LINUX */
2148                         if (tv_cmp(&tv, &shortest) < 0)
2149                                 shortest = tv;
2150                         tv_add(&tv_count[tcp->scno],
2151                                 &tv_count[tcp->scno], &tv);
2152                         tcp->flags &= ~TCB_INSYSCALL;
2153                         return 0;
2154                 }
2155
2156                 if (tcp->scno >= nsyscalls || tcp->scno < 0
2157                     || (qual_flags[tcp->scno] & QUAL_RAW))
2158                         sys_res = printargs(tcp);
2159                 else {
2160                         if (not_failing_only && tcp->u_error)
2161                                 return 0;       /* ignore failed syscalls */
2162                         sys_res = (*sysent[tcp->scno].sys_func)(tcp);
2163                 }
2164                 u_error = tcp->u_error;
2165                 tprintf(") ");
2166                 tabto(acolumn);
2167                 if (tcp->scno >= nsyscalls || tcp->scno < 0 ||
2168                     qual_flags[tcp->scno] & QUAL_RAW) {
2169                         if (u_error)
2170                                 tprintf("= -1 (errno %ld)", u_error);
2171                         else
2172                                 tprintf("= %#lx", tcp->u_rval);
2173                 }
2174                 else if (!(sys_res & RVAL_NONE) && u_error) {
2175                         switch (u_error) {
2176 #ifdef LINUX
2177                         case ERESTARTSYS:
2178                                 tprintf("= ? ERESTARTSYS (To be restarted)");
2179                                 break;
2180                         case ERESTARTNOINTR:
2181                                 tprintf("= ? ERESTARTNOINTR (To be restarted)");
2182                                 break;
2183                         case ERESTARTNOHAND:
2184                                 tprintf("= ? ERESTARTNOHAND (To be restarted)");
2185                                 break;
2186 #endif /* LINUX */
2187                         default:
2188                                 tprintf("= -1 ");
2189                                 if (u_error < 0)
2190                                         tprintf("E??? (errno %ld)", u_error);
2191                                 else if (u_error < nerrnos)
2192                                         tprintf("%s (%s)", errnoent[u_error],
2193                                                 strerror(u_error));
2194                                 else
2195                                         tprintf("ERRNO_%ld (%s)", u_error,
2196                                                 strerror(u_error));
2197                                 break;
2198                         }
2199                 }
2200                 else {
2201                         if (sys_res & RVAL_NONE)
2202                                 tprintf("= ?");
2203                         else {
2204                                 switch (sys_res & RVAL_MASK) {
2205                                 case RVAL_HEX:
2206                                         tprintf("= %#lx", tcp->u_rval);
2207                                         break;
2208                                 case RVAL_OCTAL:
2209                                         tprintf("= %#lo", tcp->u_rval);
2210                                         break;
2211                                 case RVAL_UDECIMAL:
2212                                         tprintf("= %lu", tcp->u_rval);
2213                                         break;
2214                                 case RVAL_DECIMAL:
2215                                         tprintf("= %ld", tcp->u_rval);
2216                                         break;
2217 #ifdef HAVE_LONG_LONG
2218                                 case RVAL_LHEX:
2219                                         tprintf("= %#llx", tcp->u_lrval);
2220                                         break;
2221                                 case RVAL_LOCTAL:
2222                                         tprintf("= %#llo", tcp->u_lrval);
2223                                         break;
2224                                 case RVAL_LUDECIMAL:
2225                                         tprintf("= %llu", tcp->u_lrval);
2226                                         break;
2227                                 case RVAL_LDECIMAL:
2228                                         tprintf("= %lld", tcp->u_lrval);
2229                                         break;
2230 #endif
2231                                 default:
2232                                         fprintf(stderr,
2233                                                 "invalid rval format\n");
2234                                         break;
2235                                 }
2236                         }
2237                         if ((sys_res & RVAL_STR) && tcp->auxstr)
2238                                 tprintf(" (%s)", tcp->auxstr);
2239                 }
2240                 if (dtime) {
2241                         tv_sub(&tv, &tv, &tcp->etime);
2242                         tprintf(" <%ld.%06ld>",
2243                                 (long) tv.tv_sec, (long) tv.tv_usec);
2244                 }
2245                 printtrailer(tcp);
2246
2247                 dumpio(tcp);
2248                 if (fflush(tcp->outf) == EOF)
2249                         return -1;
2250                 tcp->flags &= ~TCB_INSYSCALL;
2251                 return 0;
2252         }
2253
2254         /* Entering system call */
2255         res = syscall_enter(tcp);
2256         if (res != 1)
2257                 return res;
2258
2259         switch (tcp->scno + NR_SYSCALL_BASE) {
2260 #ifdef LINUX
2261 #if !defined (ALPHA) && !defined(SPARC) && !defined(MIPS) && !defined(HPPA) && !defined(X86_64)
2262         case SYS_socketcall:
2263                 decode_subcall(tcp, SYS_socket_subcall,
2264                         SYS_socket_nsubcalls, deref_style);
2265                 break;
2266         case SYS_ipc:
2267                 decode_subcall(tcp, SYS_ipc_subcall,
2268                         SYS_ipc_nsubcalls, shift_style);
2269                 break;
2270 #endif /* !ALPHA && !MIPS && !SPARC && !HPPA && !X86_64 */
2271 #ifdef SPARC
2272         case SYS_socketcall:
2273                 sparc_socket_decode (tcp);
2274                 break;
2275 #endif
2276 #endif /* LINUX */
2277 #ifdef SVR4
2278 #ifdef SYS_pgrpsys_subcall
2279         case SYS_pgrpsys:
2280                 decode_subcall(tcp, SYS_pgrpsys_subcall,
2281                         SYS_pgrpsys_nsubcalls, shift_style);
2282                 break;
2283 #endif /* SYS_pgrpsys_subcall */
2284 #ifdef SYS_sigcall_subcall
2285         case SYS_sigcall:
2286                 decode_subcall(tcp, SYS_sigcall_subcall,
2287                         SYS_sigcall_nsubcalls, mask_style);
2288                 break;
2289 #endif /* SYS_sigcall_subcall */
2290         case SYS_msgsys:
2291                 decode_subcall(tcp, SYS_msgsys_subcall,
2292                         SYS_msgsys_nsubcalls, shift_style);
2293                 break;
2294         case SYS_shmsys:
2295                 decode_subcall(tcp, SYS_shmsys_subcall,
2296                         SYS_shmsys_nsubcalls, shift_style);
2297                 break;
2298         case SYS_semsys:
2299                 decode_subcall(tcp, SYS_semsys_subcall,
2300                         SYS_semsys_nsubcalls, shift_style);
2301                 break;
2302 #if 0 /* broken */
2303         case SYS_utssys:
2304                 decode_subcall(tcp, SYS_utssys_subcall,
2305                         SYS_utssys_nsubcalls, shift_style);
2306                 break;
2307 #endif
2308         case SYS_sysfs:
2309                 decode_subcall(tcp, SYS_sysfs_subcall,
2310                         SYS_sysfs_nsubcalls, shift_style);
2311                 break;
2312         case SYS_spcall:
2313                 decode_subcall(tcp, SYS_spcall_subcall,
2314                         SYS_spcall_nsubcalls, shift_style);
2315                 break;
2316 #ifdef SYS_context_subcall
2317         case SYS_context:
2318                 decode_subcall(tcp, SYS_context_subcall,
2319                         SYS_context_nsubcalls, shift_style);
2320                 break;
2321 #endif /* SYS_context_subcall */
2322 #ifdef SYS_door_subcall
2323         case SYS_door:
2324                 decode_subcall(tcp, SYS_door_subcall,
2325                         SYS_door_nsubcalls, door_style);
2326                 break;
2327 #endif /* SYS_door_subcall */
2328 #ifdef SYS_kaio_subcall
2329         case SYS_kaio:
2330                 decode_subcall(tcp, SYS_kaio_subcall,
2331                         SYS_kaio_nsubcalls, shift_style);
2332                 break;
2333 #endif
2334 #endif /* SVR4 */
2335 #ifdef FREEBSD
2336         case SYS_msgsys:
2337         case SYS_shmsys:
2338         case SYS_semsys:
2339                 decode_subcall(tcp, 0, 0, table_style);
2340                 break;
2341 #endif
2342 #ifdef SUNOS4
2343         case SYS_semsys:
2344                 decode_subcall(tcp, SYS_semsys_subcall,
2345                         SYS_semsys_nsubcalls, shift_style);
2346                 break;
2347         case SYS_msgsys:
2348                 decode_subcall(tcp, SYS_msgsys_subcall,
2349                         SYS_msgsys_nsubcalls, shift_style);
2350                 break;
2351         case SYS_shmsys:
2352                 decode_subcall(tcp, SYS_shmsys_subcall,
2353                         SYS_shmsys_nsubcalls, shift_style);
2354                 break;
2355 #endif
2356         }
2357
2358         internal_syscall(tcp);
2359         if (tcp->scno >=0 && tcp->scno < nsyscalls && !(qual_flags[tcp->scno] & QUAL_TRACE)) {
2360                 tcp->flags |= TCB_INSYSCALL;
2361                 return 0;
2362         }
2363
2364         if (cflag) {
2365                 gettimeofday(&tcp->etime, NULL);
2366                 tcp->flags |= TCB_INSYSCALL;
2367                 return 0;
2368         }
2369
2370         printleader(tcp);
2371         tcp->flags &= ~TCB_REPRINT;
2372         tcp_last = tcp;
2373         if (tcp->scno >= nsyscalls || tcp->scno < 0)
2374                 tprintf("syscall_%lu(", tcp->scno);
2375         else
2376                 tprintf("%s(", sysent[tcp->scno].sys_name);
2377         if (tcp->scno >= nsyscalls || tcp->scno < 0 ||
2378             ((qual_flags[tcp->scno] & QUAL_RAW) && tcp->scno != SYS_exit))
2379                 sys_res = printargs(tcp);
2380         else
2381                 sys_res = (*sysent[tcp->scno].sys_func)(tcp);
2382         if (fflush(tcp->outf) == EOF)
2383                 return -1;
2384         tcp->flags |= TCB_INSYSCALL;
2385         /* Measure the entrance time as late as possible to avoid errors. */
2386         if (dtime)
2387                 gettimeofday(&tcp->etime, NULL);
2388         return sys_res;
2389 }
2390
2391 int
2392 printargs(tcp)
2393 struct tcb *tcp;
2394 {
2395         if (entering(tcp)) {
2396                 int i;
2397
2398                 for (i = 0; i < tcp->u_nargs; i++)
2399                         tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
2400         }
2401         return 0;
2402 }
2403
2404 long
2405 getrval2(tcp)
2406 struct tcb *tcp;
2407 {
2408         long val = -1;
2409
2410 #ifdef LINUX
2411 #ifdef SPARC
2412         struct regs regs;
2413         if (ptrace(PTRACE_GETREGS,tcp->pid,(char *)&regs,0) < 0)
2414                 return -1;
2415         val = regs.r_o1;
2416 #elif defined(SH)
2417         if (upeek(tcp->pid, 4*(REG_REG0+1), &val) < 0)
2418                 return -1;
2419 #endif /* SPARC */
2420 #endif /* LINUX */
2421
2422 #ifdef SUNOS4
2423         if (upeek(tcp->pid, uoff(u_rval2), &val) < 0)
2424                 return -1;
2425 #endif /* SUNOS4 */
2426
2427 #ifdef SVR4
2428 #ifdef SPARC
2429         val = tcp->status.PR_REG[R_O1];
2430 #endif /* SPARC */
2431 #ifdef I386
2432         val = tcp->status.PR_REG[EDX];
2433 #endif /* I386 */
2434 #ifdef X86_64
2435         val = tcp->status.PR_REG[RDX];
2436 #endif /* X86_64 */
2437 #ifdef MIPS
2438         val = tcp->status.PR_REG[CTX_V1];
2439 #endif /* MIPS */
2440 #endif /* SVR4 */
2441 #ifdef FREEBSD
2442         struct reg regs;
2443         pread(tcp->pfd_reg, &regs, sizeof(regs), 0);
2444         val = regs.r_edx;
2445 #endif
2446         return val;
2447 }
2448
2449 /*
2450  * Apparently, indirect system calls have already be converted by ptrace(2),
2451  * so if you see "indir" this program has gone astray.
2452  */
2453 int
2454 sys_indir(tcp)
2455 struct tcb *tcp;
2456 {
2457         int i, scno, nargs;
2458
2459         if (entering(tcp)) {
2460                 if ((scno = tcp->u_arg[0]) > nsyscalls) {
2461                         fprintf(stderr, "Bogus syscall: %u\n", scno);
2462                         return 0;
2463                 }
2464                 nargs = sysent[scno].nargs;
2465                 tprintf("%s", sysent[scno].sys_name);
2466                 for (i = 0; i < nargs; i++)
2467                         tprintf(", %#lx", tcp->u_arg[i+1]);
2468         }
2469         return 0;
2470 }
2471
2472 static int
2473 time_cmp(a, b)
2474 void *a;
2475 void *b;
2476 {
2477         return -tv_cmp(&tv_count[*((int *) a)], &tv_count[*((int *) b)]);
2478 }
2479
2480 static int
2481 syscall_cmp(a, b)
2482 void *a;
2483 void *b;
2484 {
2485         return strcmp(sysent[*((int *) a)].sys_name,
2486                 sysent[*((int *) b)].sys_name);
2487 }
2488
2489 static int
2490 count_cmp(a, b)
2491 void *a;
2492 void *b;
2493 {
2494         int m = call_count[*((int *) a)], n = call_count[*((int *) b)];
2495
2496         return (m < n) ? 1 : (m > n) ? -1 : 0;
2497 }
2498
2499 static int (*sortfun)();
2500 static struct timeval overhead = { -1, -1 };
2501
2502 void
2503 set_sortby(sortby)
2504 char *sortby;
2505 {
2506         if (strcmp(sortby, "time") == 0)
2507                 sortfun = time_cmp;
2508         else if (strcmp(sortby, "calls") == 0)
2509                 sortfun = count_cmp;
2510         else if (strcmp(sortby, "name") == 0)
2511                 sortfun = syscall_cmp;
2512         else if (strcmp(sortby, "nothing") == 0)
2513                 sortfun = NULL;
2514         else {
2515                 fprintf(stderr, "invalid sortby: `%s'\n", sortby);
2516                 exit(1);
2517         }
2518 }
2519
2520 void set_overhead(n)
2521 int n;
2522 {
2523         overhead.tv_sec = n / 1000000;
2524         overhead.tv_usec = n % 1000000;
2525 }
2526
2527 void
2528 call_summary(outf)
2529 FILE *outf;
2530 {
2531         int i, j;
2532         int call_cum, error_cum;
2533         struct timeval tv_cum, dtv;
2534         double percent;
2535         char *dashes = "-------------------------";
2536         char error_str[16];
2537
2538         call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0;
2539         if (overhead.tv_sec == -1) {
2540                 tv_mul(&overhead, &shortest, 8);
2541                 tv_div(&overhead, &overhead, 10);
2542         }
2543         for (i = 0; i < nsyscalls; i++) {
2544                 sorted_count[i] = i;
2545                 if (call_count[i] == 0)
2546                         continue;
2547                 tv_mul(&dtv, &overhead, call_count[i]);
2548                 tv_sub(&tv_count[i], &tv_count[i], &dtv);
2549                 call_cum += call_count[i];
2550                 error_cum += error_count[i];
2551                 tv_add(&tv_cum, &tv_cum, &tv_count[i]);
2552         }
2553         if (sortfun)
2554                 qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun);
2555         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n",
2556                 "% time", "seconds", "usecs/call",
2557                 "calls", "errors", "syscall");
2558         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
2559                 dashes, dashes, dashes, dashes, dashes, dashes);
2560         for (i = 0; i < nsyscalls; i++) {
2561                 j = sorted_count[i];
2562                 if (call_count[j] == 0)
2563                         continue;
2564                 tv_div(&dtv, &tv_count[j], call_count[j]);
2565                 if (error_count[j])
2566                         sprintf(error_str, "%d", error_count[j]);
2567                 else
2568                         error_str[0] = '\0';
2569                 percent = 100.0*tv_float(&tv_count[j])/tv_float(&tv_cum);
2570                 fprintf(outf, "%6.2f %4ld.%06ld %11ld %9d %9.9s %s\n",
2571                         percent, (long) tv_count[j].tv_sec,
2572                         (long) tv_count[j].tv_usec,
2573                         (long) 1000000 * dtv.tv_sec + dtv.tv_usec,
2574                         call_count[j], error_str, sysent[j].sys_name);
2575         }
2576         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
2577                 dashes, dashes, dashes, dashes, dashes, dashes);
2578         if (error_cum)
2579                 sprintf(error_str, "%d", error_cum);
2580         else
2581                 error_str[0] = '\0';
2582         fprintf(outf, "%6.6s %4ld.%06ld %11.11s %9d %9.9s %s\n",
2583                 "100.00", (long) tv_cum.tv_sec, (long) tv_cum.tv_usec, "",
2584                 call_cum, error_str, "total");
2585 }