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

   1 /*
   2  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
   3  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
   4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
   5  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
   6  * Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
   7  *                     Linux for s390 port by D.J. Barrow
   8  *                    <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  *      $Id$
  34  */
  35
  36 #include "defs.h"
  37
  38 #include <signal.h>
  39 #include <time.h>
  40 #include <errno.h>
  41 #include <sys/user.h>
  42 #include <sys/syscall.h>
  43 #include <sys/param.h>
  44
  45 #if HAVE_ASM_REG_H
  46 #ifdef SPARC
  47 #  define fpq kernel_fpq
  48 #  define fq kernel_fq
  49 #  define fpu kernel_fpu
  50 #endif
  51 #include <asm/reg.h>
  52 #ifdef SPARC
  53 #  undef fpq
  54 #  undef fq
  55 #  undef fpu
  56 #endif
  57 #endif
  58
  59 #ifdef HAVE_SYS_REG_H
  60 #include <sys/reg.h>
  61 #ifndef PTRACE_PEEKUSR
  62 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
  63 #endif
  64 #elif defined(HAVE_LINUX_PTRACE_H)
  65 #undef PTRACE_SYSCALL
  66 #include <linux/ptrace.h>
  67 #endif
  68
  69 #if defined(LINUX) && defined(IA64)
  70 # include <asm/ptrace_offsets.h>
  71 # include <asm/rse.h>
  72 #endif
  73
  74 #ifndef SYS_ERRLIST_DECLARED
  75 extern int sys_nerr;
  76 extern char *sys_errlist[];
  77 #endif /* SYS_ERRLIST_DECLARED */
  78
  79 #define NR_SYSCALL_BASE 0
  80 #ifdef LINUX
  81 #ifndef ERESTARTSYS
  82 #define ERESTARTSYS     512
  83 #endif
  84 #ifndef ERESTARTNOINTR
  85 #define ERESTARTNOINTR  513
  86 #endif
  87 #ifndef ERESTARTNOHAND
  88 #define ERESTARTNOHAND  514     /* restart if no handler.. */
  89 #endif
  90 #ifndef ENOIOCTLCMD
  91 #define ENOIOCTLCMD     515     /* No ioctl command */
  92 #endif
  93 #ifndef NSIG
  94 #define NSIG 32
  95 #endif
  96 #ifdef ARM
  97 #undef NSIG
  98 #define NSIG 32
  99 #undef NR_SYSCALL_BASE
 100 #define NR_SYSCALL_BASE __NR_SYSCALL_BASE
 101 #endif
 102 #endif /* LINUX */
 103
 104 #include "syscall.h"
 105
 106 /* Define these shorthand notations to simplify the syscallent files. */
 107 #define TF TRACE_FILE
 108 #define TI TRACE_IPC
 109 #define TN TRACE_NETWORK
 110 #define TP TRACE_PROCESS
 111 #define TS TRACE_SIGNAL
 112
 113 struct sysent sysent0[] = {
 114 #include "syscallent.h"
 115 };
 116 int nsyscalls0 = sizeof sysent0 / sizeof sysent0[0];
 117
 118 #if SUPPORTED_PERSONALITIES >= 2
 119 struct sysent sysent1[] = {
 120 #include "syscallent1.h"
 121 };
 122 int nsyscalls1 = sizeof sysent1 / sizeof sysent1[0];
 123 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 124
 125 #if SUPPORTED_PERSONALITIES >= 3
 126 struct sysent sysent2[] = {
 127 #include "syscallent2.h"
 128 };
 129 int nsyscalls2 = sizeof sysent2 / sizeof sysent2[0];
 130 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 131
 132 struct sysent *sysent;
 133 int nsyscalls;
 134
 135 /* Now undef them since short defines cause wicked namespace pollution. */
 136 #undef TF
 137 #undef TI
 138 #undef TN
 139 #undef TP
 140 #undef TS
 141
 142 char *errnoent0[] = {
 143 #include "errnoent.h"
 144 };
 145 int nerrnos0 = sizeof errnoent0 / sizeof errnoent0[0];
 146
 147 #if SUPPORTED_PERSONALITIES >= 2
 148 char *errnoent1[] = {
 149 #include "errnoent1.h"
 150 };
 151 int nerrnos1 = sizeof errnoent1 / sizeof errnoent1[0];
 152 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 153
 154 #if SUPPORTED_PERSONALITIES >= 3
 155 char *errnoent2[] = {
 156 #include "errnoent2.h"
 157 };
 158 int nerrnos2 = sizeof errnoent2 / sizeof errnoent2[0];
 159 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 160
 161 char **errnoent;
 162 int nerrnos;
 163
 164 int current_personality;
 165
 166 int
 167 set_personality(personality)
 168 int personality;
 169 {
 170         switch (personality) {
 171         case 0:
 172                 errnoent = errnoent0;
 173                 nerrnos = nerrnos0;
 174                 sysent = sysent0;
 175                 nsyscalls = nsyscalls0;
 176                 ioctlent = ioctlent0;
 177                 nioctlents = nioctlents0;
 178                 signalent = signalent0;
 179                 nsignals = nsignals0;
 180                 break;
 181
 182 #if SUPPORTED_PERSONALITIES >= 2
 183         case 1:
 184                 errnoent = errnoent1;
 185                 nerrnos = nerrnos1;
 186                 sysent = sysent1;
 187                 nsyscalls = nsyscalls1;
 188                 ioctlent = ioctlent1;
 189                 nioctlents = nioctlents1;
 190                 signalent = signalent1;
 191                 nsignals = nsignals1;
 192                 break;
 193 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 194
 195 #if SUPPORTED_PERSONALITIES >= 3
 196         case 2:
 197                 errnoent = errnoent2;
 198                 nerrnos = nerrnos2;
 199                 sysent = sysent2;
 200                 nsyscalls = nsyscalls2;
 201                 ioctlent = ioctlent2;
 202                 nioctlents = nioctlents2;
 203                 signalent = signalent2;
 204                 nsignals = nsignals2;
 205                 break;
 206 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 207
 208         default:
 209                 return -1;
 210         }
 211
 212         current_personality = personality;
 213         return 0;
 214 }
 215
 216 int qual_flags[MAX_QUALS];
 217
 218 static int call_count[MAX_QUALS];
 219 static int error_count[MAX_QUALS];
 220 static struct timeval tv_count[MAX_QUALS];
 221 static int sorted_count[MAX_QUALS];
 222
 223 static struct timeval shortest = { 1000000, 0 };
 224
 225 static int lookup_syscall(), lookup_signal(), lookup_fault(), lookup_desc();
 226
 227 static struct qual_options {
 228         int bitflag;
 229         char *option_name;
 230         int (*lookup)();
 231         char *argument_name;
 232 } qual_options[] = {
 233         { QUAL_TRACE,   "trace",        lookup_syscall, "system call"   },
 234         { QUAL_TRACE,   "t",            lookup_syscall, "system call"   },
 235         { QUAL_ABBREV,  "abbrev",       lookup_syscall, "system call"   },
 236         { QUAL_ABBREV,  "a",            lookup_syscall, "system call"   },
 237         { QUAL_VERBOSE, "verbose",      lookup_syscall, "system call"   },
 238         { QUAL_VERBOSE, "v",            lookup_syscall, "system call"   },
 239         { QUAL_RAW,     "raw",          lookup_syscall, "system call"   },
 240         { QUAL_RAW,     "x",            lookup_syscall, "system call"   },
 241         { QUAL_SIGNAL,  "signal",       lookup_signal,  "signal"        },
 242         { QUAL_SIGNAL,  "signals",      lookup_signal,  "signal"        },
 243         { QUAL_SIGNAL,  "s",            lookup_signal,  "signal"        },
 244         { QUAL_FAULT,   "fault",        lookup_fault,   "fault"         },
 245         { QUAL_FAULT,   "faults",       lookup_fault,   "fault"         },
 246         { QUAL_FAULT,   "m",            lookup_fault,   "fault"         },
 247         { QUAL_READ,    "read",         lookup_desc,    "descriptor"    },
 248         { QUAL_READ,    "reads",        lookup_desc,    "descriptor"    },
 249         { QUAL_READ,    "r",            lookup_desc,    "descriptor"    },
 250         { QUAL_WRITE,   "write",        lookup_desc,    "descriptor"    },
 251         { QUAL_WRITE,   "writes",       lookup_desc,    "descriptor"    },
 252         { QUAL_WRITE,   "w",            lookup_desc,    "descriptor"    },
 253         { 0,            NULL,           NULL,           NULL            },
 254 };
 255
 256 static int
 257 lookup_syscall(s)
 258 char *s;
 259 {
 260         int i;
 261
 262         for (i = 0; i < nsyscalls; i++) {
 263                 if (strcmp(s, sysent[i].sys_name) == 0)
 264                         return i;
 265         }
 266         return -1;
 267 }
 268
 269 static int
 270 lookup_signal(s)
 271 char *s;
 272 {
 273         int i;
 274         char buf[32];
 275
 276         if (s && *s && isdigit((unsigned char)*s))
 277                 return atoi(s);
 278         strcpy(buf, s);
 279         s = buf;
 280         for (i = 0; s[i]; i++)
 281                 s[i] = toupper((unsigned char)(s[i]));
 282         if (strncmp(s, "SIG", 3) == 0)
 283                 s += 3;
 284         for (i = 0; i <= NSIG; i++) {
 285                 if (strcmp(s, signame(i) + 3) == 0)
 286                         return i;
 287         }
 288         return -1;
 289 }
 290
 291 static int
 292 lookup_fault(s)
 293 char *s;
 294 {
 295         return -1;
 296 }
 297
 298 static int
 299 lookup_desc(s)
 300 char *s;
 301 {
 302         if (s && *s && isdigit((unsigned char)*s))
 303                 return atoi(s);
 304         return -1;
 305 }
 306
 307 static int
 308 lookup_class(s)
 309 char *s;
 310 {
 311         if (strcmp(s, "file") == 0)
 312                 return TRACE_FILE;
 313         if (strcmp(s, "ipc") == 0)
 314                 return TRACE_IPC;
 315         if (strcmp(s, "network") == 0)
 316                 return TRACE_NETWORK;
 317         if (strcmp(s, "process") == 0)
 318                 return TRACE_PROCESS;
 319         if (strcmp(s, "signal") == 0)
 320                 return TRACE_SIGNAL;
 321         return -1;
 322 }
 323
 324 void
 325 qualify(s)
 326 char *s;
 327 {
 328         struct qual_options *opt;
 329         int not;
 330         char *p;
 331         int i, n;
 332
 333         opt = &qual_options[0];
 334         for (i = 0; (p = qual_options[i].option_name); i++) {
 335                 n = strlen(p);
 336                 if (strncmp(s, p, n) == 0 && s[n] == '=') {
 337                         opt = &qual_options[i];
 338                         s += n + 1;
 339                         break;
 340                 }
 341         }
 342         not = 0;
 343         if (*s == '!') {
 344                 not = 1;
 345                 s++;
 346         }
 347         if (strcmp(s, "none") == 0) {
 348                 not = 1 - not;
 349                 s = "all";
 350         }
 351         if (strcmp(s, "all") == 0) {
 352                 for (i = 0; i < MAX_QUALS; i++) {
 353                         if (not)
 354                                 qual_flags[i] &= ~opt->bitflag;
 355                         else
 356                                 qual_flags[i] |= opt->bitflag;
 357                 }
 358                 return;
 359         }
 360         for (i = 0; i < MAX_QUALS; i++) {
 361                 if (not)
 362                         qual_flags[i] |= opt->bitflag;
 363                 else
 364                         qual_flags[i] &= ~opt->bitflag;
 365         }
 366         for (p = strtok(s, ","); p; p = strtok(NULL, ",")) {
 367                 if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
 368                         for (i = 0; i < MAX_QUALS; i++) {
 369                                 if (sysent[i].sys_flags & n) {
 370                                         if (not)
 371                                                 qual_flags[i] &= ~opt->bitflag;
 372                                         else
 373                                                 qual_flags[i] |= opt->bitflag;
 374                                 }
 375                         }
 376                         continue;
 377                 }
 378                 if ((n = (*opt->lookup)(p)) < 0) {
 379                         fprintf(stderr, "strace: invalid %s `%s'\n",
 380                                 opt->argument_name, p);
 381                         exit(1);
 382                 }
 383                 if (not)
 384                         qual_flags[n] &= ~opt->bitflag;
 385                 else
 386                         qual_flags[n] |= opt->bitflag;
 387         }
 388         return;
 389 }
 390
 391 static void
 392 dumpio(tcp)
 393 struct tcb *tcp;
 394 {
 395         if (syserror(tcp))
 396                 return;
 397         if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= MAX_QUALS)
 398                 return;
 399         switch (tcp->scno + NR_SYSCALL_BASE) {
 400         case SYS_read:
 401 #ifdef SYS_recv
 402         case SYS_recv:
 403 #endif
 404 #ifdef SYS_recvfrom
 405         case SYS_recvfrom:
 406 #endif
 407                 if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
 408                         dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
 409                 break;
 410         case SYS_write:
 411 #ifdef SYS_send
 412         case SYS_send:
 413 #endif
 414 #ifdef SYS_sendto
 415         case SYS_sendto:
 416 #endif
 417                 if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
 418                         dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 419                 break;
 420 #ifdef SYS_readv
 421         case SYS_readv:
 422                 if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
 423                         dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
 424                 break;
 425 #endif
 426 #ifdef SYS_writev
 427         case SYS_writev:
 428
 429                 if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
 430                         dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
 431                 break;
 432 #endif
 433         }
 434 }
 435
 436 #ifndef FREEBSD
 437 enum subcall_style { shift_style, deref_style, mask_style, door_style };
 438 #else /* FREEBSD */
 439 enum subcall_style { shift_style, deref_style, mask_style, door_style, table_style };
 440
 441 struct subcall {
 442   int call;
 443   int nsubcalls;
 444   int subcalls[5];
 445 };
 446
 447 const struct subcall subcalls_table[] = {
 448   { SYS_shmsys, 5, { SYS_shmat, SYS_shmctl, SYS_shmdt, SYS_shmget, SYS_shmctl } },
 449 #ifdef SYS_semconfig
 450   { SYS_semsys, 4, { SYS___semctl, SYS_semget, SYS_semop, SYS_semconfig } },
 451 #else
 452   { SYS_semsys, 3, { SYS___semctl, SYS_semget, SYS_semop } },
 453 #endif
 454   { SYS_msgsys, 4, { SYS_msgctl, SYS_msgget, SYS_msgsnd, SYS_msgrcv } },
 455 };
 456 #endif /* FREEBSD */
 457
 458 #if !(defined(LINUX) && ( defined(ALPHA) || defined(MIPS) ))
 459
 460 const int socket_map [] = {
 461                /* SYS_SOCKET      */ 97,
 462                /* SYS_BIND        */ 104,
 463                /* SYS_CONNECT     */ 98,
 464                /* SYS_LISTEN      */ 106,
 465                /* SYS_ACCEPT      */ 99,
 466                /* SYS_GETSOCKNAME */ 150,
 467                /* SYS_GETPEERNAME */ 141,
 468                /* SYS_SOCKETPAIR  */ 135,
 469                /* SYS_SEND        */ 101,
 470                /* SYS_RECV        */ 102,
 471                /* SYS_SENDTO      */ 133,
 472                /* SYS_RECVFROM    */ 125,
 473                /* SYS_SHUTDOWN    */ 134,
 474                /* SYS_SETSOCKOPT  */ 105,
 475                /* SYS_GETSOCKOPT  */ 118,
 476                /* SYS_SENDMSG     */ 114,
 477                /* SYS_RECVMSG     */ 113
 478 };
 479
 480 void
 481 sparc_socket_decode (tcp)
 482 struct tcb *tcp;
 483 {
 484         volatile long addr;
 485         volatile int i, n;
 486
 487         if (tcp->u_arg [0] < 1 || tcp->u_arg [0] > sizeof(socket_map)/sizeof(int)+1){
 488                 return;
 489         }
 490         tcp->scno = socket_map [tcp->u_arg [0]-1];
 491         n = tcp->u_nargs = sysent [tcp->scno].nargs;
 492         addr = tcp->u_arg [1];
 493         for (i = 0; i < n; i++){
 494                 int arg;
 495                 if (umoven (tcp, addr, sizeof (arg), (void *) &arg) < 0)
 496                         arg = 0;
 497                 tcp->u_arg [i] = arg;
 498                 addr += sizeof (arg);
 499         }
 500 }
 501
 502 static void
 503 decode_subcall(tcp, subcall, nsubcalls, style)
 504 struct tcb *tcp;
 505 int subcall;
 506 int nsubcalls;
 507 enum subcall_style style;
 508 {
 509         int i, addr, mask, arg;
 510
 511         switch (style) {
 512         case shift_style:
 513                 if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
 514                         return;
 515                 tcp->scno = subcall + tcp->u_arg[0];
 516                 if (sysent[tcp->scno].nargs != -1)
 517                         tcp->u_nargs = sysent[tcp->scno].nargs;
 518                 else
 519                         tcp->u_nargs--;
 520                 for (i = 0; i < tcp->u_nargs; i++)
 521                         tcp->u_arg[i] = tcp->u_arg[i + 1];
 522                 break;
 523         case deref_style:
 524                 if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
 525                         return;
 526                 tcp->scno = subcall + tcp->u_arg[0];
 527                 addr = tcp->u_arg[1];
 528                 for (i = 0; i < sysent[tcp->scno].nargs; i++) {
 529                         if (umove(tcp, addr, &arg) < 0)
 530                                 arg = 0;
 531                         tcp->u_arg[i] = arg;
 532                         addr += sizeof(arg);
 533                 }
 534                 tcp->u_nargs = sysent[tcp->scno].nargs;
 535                 break;
 536         case mask_style:
 537                 mask = (tcp->u_arg[0] >> 8) & 0xff;
 538                 for (i = 0; mask; i++)
 539                         mask >>= 1;
 540                 if (i >= nsubcalls)
 541                         return;
 542                 tcp->u_arg[0] &= 0xff;
 543                 tcp->scno = subcall + i;
 544                 if (sysent[tcp->scno].nargs != -1)
 545                         tcp->u_nargs = sysent[tcp->scno].nargs;
 546                 break;
 547         case door_style:
 548                 /*
 549                  * Oh, yuck.  The call code is the *sixth* argument.
 550                  * (don't you mean the *last* argument? - JH)
 551                  */
 552                 if (tcp->u_arg[5] < 0 || tcp->u_arg[5] >= nsubcalls)
 553                         return;
 554                 tcp->scno = subcall + tcp->u_arg[5];
 555                 if (sysent[tcp->scno].nargs != -1)
 556                         tcp->u_nargs = sysent[tcp->scno].nargs;
 557                 else
 558                         tcp->u_nargs--;
 559                 break;
 560 #ifdef FREEBSD
 561         case table_style:
 562                 for (i = 0; i < sizeof(subcalls_table) / sizeof(struct subcall); i++)
 563                         if (subcalls_table[i].call == tcp->scno) break;
 564                 if (i < sizeof(subcalls_table) / sizeof(struct subcall) &&
 565                     tcp->u_arg[0] >= 0 && tcp->u_arg[0] < subcalls_table[i].nsubcalls) {
 566                         tcp->scno = subcalls_table[i].subcalls[tcp->u_arg[0]];
 567                         for (i = 0; i < tcp->u_nargs; i++)
 568                                 tcp->u_arg[i] = tcp->u_arg[i + 1];
 569                 }
 570                 break;
 571 #endif /* FREEBSD */
 572         }
 573 }
 574 #endif
 575
 576 struct tcb *tcp_last = NULL;
 577
 578 static int
 579 internal_syscall(tcp)
 580 struct tcb *tcp;
 581 {
 582         /*
 583          * We must always trace a few critical system calls in order to
 584          * correctly support following forks in the presence of tracing
 585          * qualifiers.
 586          */
 587         switch (tcp->scno + NR_SYSCALL_BASE) {
 588 #ifdef SYS_fork
 589         case SYS_fork:
 590 #endif
 591 #ifdef SYS_vfork
 592         case SYS_vfork:
 593 #endif
 594 #ifdef SYS_fork1
 595         case SYS_fork1:
 596 #endif
 597 #ifdef SYS_forkall
 598         case SYS_forkall:
 599 #endif
 600 #ifdef SYS_rfork1
 601         case SYS_rfork1:
 602 #endif
 603 #ifdef SYS_rforkall
 604         case SYS_rforkall:
 605 #endif
 606                 internal_fork(tcp);
 607                 break;
 608 #ifdef SYS_clone
 609         case SYS_clone:
 610                 internal_clone(tcp);
 611                 break;
 612 #endif
 613 #ifdef SYS_clone2
 614         case SYS_clone2:
 615                 internal_clone(tcp);
 616                 break;
 617 #endif
 618 #ifdef SYS_execv
 619         case SYS_execv:
 620 #endif
 621 #ifdef SYS_execve
 622         case SYS_execve:
 623 #endif
 624 #ifdef SYS_rexecve
 625         case SYS_rexecve:
 626 #endif
 627                 internal_exec(tcp);
 628                 break;
 629
 630 #ifdef SYS_wait
 631         case SYS_wait:
 632 #endif
 633 #ifdef SYS_wait4
 634         case SYS_wait4:
 635 #endif
 636 #ifdef SYS32_wait4
 637         case SYS32_wait4:
 638 #endif
 639 #ifdef SYS_waitpid
 640         case SYS_waitpid:
 641 #endif
 642 #ifdef SYS_waitsys
 643         case SYS_waitsys:
 644 #endif
 645                 internal_wait(tcp);
 646                 break;
 647
 648 #ifdef SYS_exit
 649         case SYS_exit:
 650 #endif
 651 #ifdef SYS32_exit
 652         case SYS32_exit:
 653 #endif
 654                 internal_exit(tcp);
 655                 break;
 656         }
 657         return 0;
 658 }
 659
 660
 661 #ifdef LINUX
 662 #if defined (I386)
 663         static long eax;
 664 #elif defined (IA64)
 665         long r8, r10, psr;
 666         long ia32 = 0;
 667 #elif defined (POWERPC)
 668         static long result,flags;
 669 #elif defined (M68K)
 670         static int d0;
 671 #elif defined (ARM)
 672         static int r0;
 673 #elif defined (ALPHA)
 674         static long r0;
 675         static long a3;
 676 #elif defined (SPARC)
 677         static struct regs regs;
 678         static unsigned long trap;
 679 #elif defined(MIPS)
 680         static long a3;
 681         static long r2;
 682 #elif defined(S390)
 683         static long gpr2;
 684         static long pc;
 685 #elif defined(HPPA)
 686         static long r28;
 687 #elif defined(SH)
 688        static long r0;
 689
 690 #endif
 691 #endif /* LINUX */
 692 #ifdef FREEBSD
 693         struct reg regs;
 694 #endif /* FREEBSD */
 695
 696 int
 697 get_scno(tcp)
 698 struct tcb *tcp;
 699 {
 700         long scno = 0;
 701 #ifndef USE_PROCFS
 702         int pid = tcp->pid;
 703 #endif /* !PROCFS */
 704
 705 #ifdef LINUX
 706 #if defined(S390)
 707         if (upeek(tcp->pid,PT_PSWADDR,&pc) < 0)
 708                 return -1;
 709         scno = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)(pc-4),0);
 710         if (errno)
 711                 return -1;
 712         scno&=0xFF;
 713 #elif defined (POWERPC)
 714         if (upeek(pid, 4*PT_R0, &scno) < 0)
 715                 return -1;
 716         if (!(tcp->flags & TCB_INSYSCALL)) {
 717                 /* Check if we return from execve. */
 718                 if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) {
 719                         tcp->flags &= ~TCB_WAITEXECVE;
 720                         return 0;
 721                 }
 722         }
 723 #elif defined (I386)
 724         if (upeek(pid, 4*ORIG_EAX, &scno) < 0)
 725                 return -1;
 726 #elif defined(IA64)
 727 #       define IA64_PSR_IS      ((long)1 << 34)
 728         if (upeek (pid, PT_CR_IPSR, &psr) >= 0)
 729                 ia32 = (psr & IA64_PSR_IS) != 0;
 730         if (!(tcp->flags & TCB_INSYSCALL)) {
 731                 if (ia32) {
 732                         if (upeek(pid, PT_R1, &scno) < 0)       /* orig eax */
 733                                 return -1;
 734                         /* Check if we return from execve. */
 735                 } else {
 736                         if (upeek (pid, PT_R15, &scno) < 0)
 737                                 return -1;
 738                 }
 739         } else {
 740                 /* syscall in progress */
 741                 if (upeek (pid, PT_R8, &r8) < 0)
 742                         return -1;
 743                 if (upeek (pid, PT_R10, &r10) < 0)
 744                         return -1;
 745         }
 746         if (tcp->flags & TCB_WAITEXECVE) {
 747                 tcp->flags &= ~TCB_WAITEXECVE;
 748                 return 0;
 749         }
 750
 751 #elif defined (ARM)
 752         {
 753             long pc;
 754             upeek(pid, 4*15, &pc);
 755             umoven(tcp, pc-4, 4, (char *)&scno);
 756             scno &= 0x000fffff;
 757         }
 758 #elif defined (M68K)
 759         if (upeek(pid, 4*PT_ORIG_D0, &scno) < 0)
 760                 return -1;
 761 #elif defined (MIPS)
 762         if (upeek(pid, REG_A3, &a3) < 0)
 763                 return -1;
 764
 765         if(!(tcp->flags & TCB_INSYSCALL)) {
 766                 if (upeek(pid, REG_V0, &scno) < 0)
 767                         return -1;
 768
 769                 if (scno < 0 || scno > nsyscalls) {
 770                         if(a3 == 0 || a3 == -1) {
 771                                 if(debug)
 772                                         fprintf (stderr, "stray syscall exit: v0 = %ld\n", scno);
 773                                 return 0;
 774                         }
 775                 }
 776         } else {
 777                 if (upeek(pid, REG_V0, &r2) < 0)
 778                         return -1;
 779         }
 780 #elif defined (ALPHA)
 781         if (upeek(pid, REG_A3, &a3) < 0)
 782                 return -1;
 783
 784         if (!(tcp->flags & TCB_INSYSCALL)) {
 785                 if (upeek(pid, REG_R0, &scno) < 0)
 786                         return -1;
 787
 788                 /* Check if we return from execve. */
 789                 if (scno == 0 && tcp->flags & TCB_WAITEXECVE) {
 790                         tcp->flags &= ~TCB_WAITEXECVE;
 791                         return 0;
 792                 }
 793
 794                 /*
 795                  * Do some sanity checks to figure out if it's
 796                  * really a syscall entry
 797                  */
 798                 if (scno < 0 || scno > nsyscalls) {
 799                         if (a3 == 0 || a3 == -1) {
 800                                 if (debug)
 801                                         fprintf (stderr, "stray syscall exit: r0 = %ld\n", scno);
 802                                 return 0;
 803                         }
 804                 }
 805         }
 806         else {
 807                 if (upeek(pid, REG_R0, &r0) < 0)
 808                         return -1;
 809         }
 810 #elif defined (SPARC)
 811         /* Everything we need is in the current register set. */
 812         if (ptrace(PTRACE_GETREGS,pid,(char *)&regs,0) < 0)
 813                 return -1;
 814
 815         /* If we are entering, then disassemble the syscall trap. */
 816         if (!(tcp->flags & TCB_INSYSCALL)) {
 817                 /* Retrieve the syscall trap instruction. */
 818                 errno = 0;
 819                 trap = ptrace(PTRACE_PEEKTEXT,pid,(char *)regs.r_pc,0);
 820                 if (errno)
 821                         return -1;
 822
 823                 /* Disassemble the trap to see what personality to use. */
 824                 switch (trap) {
 825                 case 0x91d02010:
 826                         /* Linux/SPARC syscall trap. */
 827                         set_personality(0);
 828                         break;
 829                 case 0x91d0206d:
 830                         /* Linux/SPARC64 syscall trap. */
 831                         fprintf(stderr,"syscall: Linux/SPARC64 not supported yet\n");
 832                         return -1;
 833                 case 0x91d02000:
 834                         /* SunOS syscall trap. (pers 1) */
 835                         fprintf(stderr,"syscall: SunOS no support\n");
 836                         return -1;
 837                 case 0x91d02008:
 838                         /* Solaris 2.x syscall trap. (per 2) */
 839                         set_personality(1);
 840                         break;
 841                 case 0x91d02009:
 842                         /* NetBSD/FreeBSD syscall trap. */
 843                         fprintf(stderr,"syscall: NetBSD/FreeBSD not supported\n");
 844                         return -1;
 845                 case 0x91d02027:
 846                         /* Solaris 2.x gettimeofday */
 847                         set_personality(1);
 848                         break;
 849                 default:
 850                         /* Unknown syscall trap. */
 851                         if(tcp->flags & TCB_WAITEXECVE) {
 852                                 tcp->flags &= ~TCB_WAITEXECVE;
 853                                 return 0;
 854                         }
 855                         fprintf(stderr,"syscall: unknown syscall trap %08x %08x\n", trap, regs.r_pc);
 856                         return -1;
 857                 }
 858
 859                 /* Extract the system call number from the registers. */
 860                 if (trap == 0x91d02027)
 861                         scno = 156;
 862                 else
 863                         scno = regs.r_g1;
 864                 if (scno == 0) {
 865                         scno = regs.r_o0;
 866                         memmove (&regs.r_o0, &regs.r_o1, 7*sizeof(regs.r_o0));
 867                 }
 868         }
 869 #elif defined(HPPA)
 870         if (upeek(pid, PT_GR20, &scno) < 0)
 871                 return -1;
 872         if (!(tcp->flags & TCB_INSYSCALL)) {
 873                 /* Check if we return from execve. */
 874                 if ((tcp->flags & TCB_WAITEXECVE)) {
 875                         tcp->flags &= ~TCB_WAITEXECVE;
 876                         return 0;
 877                 }
 878         }
 879 #elif defined(SH)
 880        /*
 881         * In the new syscall ABI, the system call number is in R3.
 882         */
 883        if (upeek(pid, 4*(REG_REG0+3), &scno) < 0)
 884                return -1;
 885
 886        if (scno < 0) {
 887            /* Odd as it may seem, a glibc bug has been known to cause
 888               glibc to issue bogus negative syscall numbers.  So for
 889               our purposes, make strace print what it *should* have been */
 890            long correct_scno = (scno & 0xff);
 891            if (debug)
 892                fprintf(stderr,
 893                    "Detected glibc bug: bogus system call number = %ld, "
 894                    "correcting to %ld\n",
 895                    scno,
 896                    correct_scno);
 897            scno = correct_scno;
 898        }
 899
 900
 901        if (!(tcp->flags & TCB_INSYSCALL)) {
 902                /* Check if we return from execve. */
 903                if (scno == 0 && tcp->flags & TCB_WAITEXECVE) {
 904                        tcp->flags &= ~TCB_WAITEXECVE;
 905                        return 0;
 906                }
 907        }
 908 #endif /* SH */
 909 #endif /* LINUX */
 910 #ifdef SUNOS4
 911         if (upeek(pid, uoff(u_arg[7]), &scno) < 0)
 912                 return -1;
 913 #elif defined(SH)
 914        /* new syscall ABI returns result in R0 */
 915        if (upeek(pid, 4*REG_REG0, (long *)&r0) < 0)
 916                return -1;
 917 #endif
 918 #ifdef USE_PROCFS
 919 #ifdef HAVE_PR_SYSCALL
 920         scno = tcp->status.PR_SYSCALL;
 921 #else /* !HAVE_PR_SYSCALL */
 922 #ifndef FREEBSD
 923         scno = tcp->status.PR_WHAT;
 924 #else /* FREEBSD */
 925         if (pread(tcp->pfd_reg, &regs, sizeof(regs), 0) < 0) {
 926                 perror("pread");
 927                 return -1;
 928         }
 929         switch (regs.r_eax) {
 930         case SYS_syscall:
 931         case SYS___syscall:
 932                 pread(tcp->pfd, &scno, sizeof(scno), regs.r_esp + sizeof(int));
 933                 break;
 934         default:
 935                 scno = regs.r_eax;
 936                 break;
 937         }
 938 #endif /* FREEBSD */
 939 #endif /* !HAVE_PR_SYSCALL */
 940 #endif /* USE_PROCFS */
 941         if (!(tcp->flags & TCB_INSYSCALL))
 942                 tcp->scno = scno;
 943         return 1;
 944 }
 945
 946
 947 int
 948 syscall_fixup(tcp)
 949 struct tcb *tcp;
 950 {
 951 #ifndef USE_PROCFS
 952         int pid = tcp->pid;
 953 #else /* USE_PROCFS */
 954         int scno = tcp->scno;
 955
 956         if (!(tcp->flags & TCB_INSYSCALL)) {
 957                 if (tcp->status.PR_WHY != PR_SYSENTRY) {
 958                         if (
 959                             scno == SYS_fork
 960 #ifdef SYS_vfork
 961                             || scno == SYS_vfork
 962 #endif /* SYS_vfork */
 963 #ifdef SYS_fork1
 964                             || scno == SYS_fork1
 965 #endif /* SYS_fork1 */
 966 #ifdef SYS_forkall
 967                             || scno == SYS_forkall
 968 #endif /* SYS_forkall */
 969 #ifdef SYS_rfork1
 970                             || scno == SYS_rfork1
 971 #endif /* SYS_fork1 */
 972 #ifdef SYS_rforkall
 973                             || scno == SYS_rforkall
 974 #endif /* SYS_rforkall */
 975                             ) {
 976                                 /* We are returning in the child, fake it. */
 977                                 tcp->status.PR_WHY = PR_SYSENTRY;
 978                                 trace_syscall(tcp);
 979                                 tcp->status.PR_WHY = PR_SYSEXIT;
 980                         }
 981                         else {
 982                                 fprintf(stderr, "syscall: missing entry\n");
 983                                 tcp->flags |= TCB_INSYSCALL;
 984                         }
 985                 }
 986         }
 987         else {
 988                 if (tcp->status.PR_WHY != PR_SYSEXIT) {
 989                         fprintf(stderr, "syscall: missing exit\n");
 990                         tcp->flags &= ~TCB_INSYSCALL;
 991                 }
 992         }
 993 #endif /* USE_PROCFS */
 994 #ifdef SUNOS4
 995         if (!(tcp->flags & TCB_INSYSCALL)) {
 996                 if (scno == 0) {
 997                         fprintf(stderr, "syscall: missing entry\n");
 998                         tcp->flags |= TCB_INSYSCALL;
 999                 }
1000         }
1001         else {
1002                 if (scno != 0) {
1003                         if (debug) {
1004                                 /*
1005                                  * This happens when a signal handler
1006                                  * for a signal which interrupted a
1007                                  * a system call makes another system call.
1008                                  */
1009                                 fprintf(stderr, "syscall: missing exit\n");
1010                         }
1011                         tcp->flags &= ~TCB_INSYSCALL;
1012                 }
1013         }
1014 #endif /* SUNOS4 */
1015 #ifdef LINUX
1016 #if defined (I386)
1017         if (upeek(pid, 4*EAX, &eax) < 0)
1018                 return -1;
1019         if (eax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
1020                 if (debug)
1021                         fprintf(stderr, "stray syscall exit: eax = %ld\n", eax);
1022                 return 0;
1023         }
1024 #elif defined (S390)
1025         if (upeek(pid, PT_GPR2, &gpr2) < 0)
1026                 return -1;
1027         if (gpr2 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
1028                 if (debug)
1029                         fprintf(stderr, "stray syscall exit: gpr2 = %ld\n", gpr2);
1030                 return 0;
1031         }
1032 #elif defined (POWERPC)
1033 # define SO_MASK 0x10000000
1034         if (upeek(pid, 4*PT_CCR, &flags) < 0)
1035                 return -1;
1036         if (upeek(pid, 4*PT_R3, &result) < 0)
1037                 return -1;
1038         if (flags & SO_MASK)
1039                 result = -result;
1040 #elif defined (M68K)
1041         if (upeek(pid, 4*PT_D0, &d0) < 0)
1042                 return -1;
1043         if (d0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
1044                 if (debug)
1045                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", d0);
1046                 return 0;
1047         }
1048 #elif defined (ARM)
1049         if (upeek(pid, 4*0, (long *)&r0) < 0)
1050                 return -1;
1051         if ( 0 && r0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
1052                 if (debug)
1053                         fprintf(stderr, "stray syscall exit: d0 = %ld\n", r0);
1054                 return 0;
1055         }
1056 #elif defined (HPPA)
1057         if (upeek(pid, PT_GR28, &r28) < 0)
1058                 return -1;
1059 #elif defined(IA64)
1060         if (upeek(pid, PT_R10, &r10) < 0)
1061                 return -1;
1062         if (upeek(pid, PT_R8, &r8) < 0)
1063                 return -1;
1064         if (ia32 && r8 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
1065                 if (debug)
1066                         fprintf(stderr, "stray syscall exit: r8 = %ld\n", r8);
1067                 return 0;
1068         }
1069 #endif
1070 #endif /* LINUX */
1071         return 1;
1072 }
1073
1074 int
1075 get_error(tcp)
1076 struct tcb *tcp;
1077 {
1078         int u_error = 0;
1079 #ifdef LINUX
1080 #ifdef S390
1081                 if (gpr2 && (unsigned) -gpr2 < nerrnos) {
1082                         tcp->u_rval = -1;
1083                         u_error = -gpr2;
1084                 }
1085                 else {
1086                         tcp->u_rval = gpr2;
1087                         u_error = 0;
1088                 }
1089 #else /* !S390 */
1090 #ifdef I386
1091                 if (eax < 0 && -eax < nerrnos) {
1092                         tcp->u_rval = -1;
1093                         u_error = -eax;
1094                 }
1095                 else {
1096                         tcp->u_rval = eax;
1097                         u_error = 0;
1098                 }
1099 #else /* !I386 */
1100 #ifdef IA64
1101                 if (ia32) {
1102                         int err;
1103
1104                         err = (int)r8;
1105                         if (err < 0 && -err < nerrnos) {
1106                                 tcp->u_rval = -1;
1107                                 u_error = -err;
1108                         }
1109                         else {
1110                                 tcp->u_rval = err;
1111                                 u_error = 0;
1112                         }
1113                 } else {
1114                         if (r10) {
1115                                 tcp->u_rval = -1;
1116                                 u_error = r8;
1117                         } else {
1118                                 tcp->u_rval = r8;
1119                                 u_error = 0;
1120                         }
1121                 }
1122 #else /* !IA64 */
1123 #ifdef MIPS
1124                 if (a3) {
1125                         tcp->u_rval = -1;
1126                         u_error = r2;
1127                 } else {
1128                         tcp->u_rval = r2;
1129                         u_error = 0;
1130                 }
1131 #else
1132 #ifdef POWERPC
1133                 if (result && (unsigned) -result < nerrnos) {
1134                         tcp->u_rval = -1;
1135                         u_error = -result;
1136                 }
1137                 else {
1138                         tcp->u_rval = result;
1139                         u_error = 0;
1140                 }
1141 #else /* !POWERPC */
1142 #ifdef M68K
1143                 if (d0 && (unsigned) -d0 < nerrnos) {
1144                         tcp->u_rval = -1;
1145                         u_error = -d0;
1146                 }
1147                 else {
1148                         tcp->u_rval = d0;
1149                         u_error = 0;
1150                 }
1151 #else /* !M68K */
1152 #ifdef ARM
1153                 if (r0 && (unsigned) -r0 < nerrnos) {
1154                         tcp->u_rval = -1;
1155                         u_error = -r0;
1156                 }
1157                 else {
1158                         tcp->u_rval = r0;
1159                         u_error = 0;
1160                 }
1161 #else /* !ARM */
1162 #ifdef ALPHA
1163                 if (a3) {
1164                         tcp->u_rval = -1;
1165                         u_error = r0;
1166                 }
1167                 else {
1168                         tcp->u_rval = r0;
1169                         u_error = 0;
1170                 }
1171 #else /* !ALPHA */
1172 #ifdef SPARC
1173                 if (regs.r_psr & PSR_C) {
1174                         tcp->u_rval = -1;
1175                         u_error = regs.r_o0;
1176                 }
1177                 else {
1178                         tcp->u_rval = regs.r_o0;
1179                         u_error = 0;
1180                 }
1181 #else /* !SPARC */
1182 #ifdef HPPA
1183                 if (r28 && (unsigned) -r28 < nerrnos) {
1184                         tcp->u_rval = -1;
1185                         u_error = -r28;
1186                 }
1187                 else {
1188                         tcp->u_rval = r28;
1189                         u_error = 0;
1190                 }
1191 #else
1192 #ifdef SH
1193                /* interpret R0 as return value or error number */
1194                if (r0 && (unsigned) -r0 < nerrnos) {
1195                        tcp->u_rval = -1;
1196                        u_error = -r0;
1197                }
1198                else {
1199                        tcp->u_rval = r0;
1200                        u_error = 0;
1201                }
1202 #endif /* SH */
1203 #endif /* HPPA */
1204 #endif /* SPARC */
1205 #endif /* ALPHA */
1206 #endif /* ARM */
1207 #endif /* M68K */
1208 #endif /* POWERPC */
1209 #endif /* MIPS */
1210 #endif /* IA64 */
1211 #endif /* I386 */
1212 #endif /* S390 */
1213 #endif /* LINUX */
1214 #ifdef SUNOS4
1215                 /* get error code from user struct */
1216                 if (upeek(pid, uoff(u_error), &u_error) < 0)
1217                         return -1;
1218                 u_error >>= 24; /* u_error is a char */
1219
1220                 /* get system call return value */
1221                 if (upeek(pid, uoff(u_rval1), &tcp->u_rval) < 0)
1222                         return -1;
1223 #endif /* SUNOS4 */
1224 #ifdef SVR4
1225 #ifdef SPARC
1226                 /* Judicious guessing goes a long way. */
1227                 if (tcp->status.pr_reg[R_PSR] & 0x100000) {
1228                         tcp->u_rval = -1;
1229                         u_error = tcp->status.pr_reg[R_O0];
1230                 }
1231                 else {
1232                         tcp->u_rval = tcp->status.pr_reg[R_O0];
1233                         u_error = 0;
1234                 }
1235 #endif /* SPARC */
1236 #ifdef I386
1237                 /* Wanna know how to kill an hour single-stepping? */
1238                 if (tcp->status.PR_REG[EFL] & 0x1) {
1239                         tcp->u_rval = -1;
1240                         u_error = tcp->status.PR_REG[EAX];
1241                 }
1242                 else {
1243                         tcp->u_rval = tcp->status.PR_REG[EAX];
1244 #ifdef HAVE_LONG_LONG
1245                         tcp->u_lrval =
1246                                 ((unsigned long long) tcp->status.PR_REG[EDX] << 32) +
1247                                 tcp->status.PR_REG[EAX];
1248 #endif
1249                         u_error = 0;
1250                 }
1251 #endif /* I386 */
1252 #ifdef MIPS
1253                 if (tcp->status.pr_reg[CTX_A3]) {
1254                         tcp->u_rval = -1;
1255                         u_error = tcp->status.pr_reg[CTX_V0];
1256                 }
1257                 else {
1258                         tcp->u_rval = tcp->status.pr_reg[CTX_V0];
1259                         u_error = 0;
1260                 }
1261 #endif /* MIPS */
1262 #endif /* SVR4 */
1263 #ifdef FREEBSD
1264                 if (regs.r_eflags & PSL_C) {
1265                         tcp->u_rval = -1;
1266                         u_error = regs.r_eax;
1267                 } else {
1268                         tcp->u_rval = regs.r_eax;
1269                         tcp->u_lrval =
1270                           ((unsigned long long) regs.r_edx << 32) +  regs.r_eax;
1271                         u_error = 0;
1272                 }
1273 #endif /* FREEBSD */
1274         tcp->u_error = u_error;
1275         return 1;
1276 }
1277
1278 int syscall_enter(tcp)
1279 struct tcb *tcp;
1280 {
1281 #ifndef USE_PROCFS
1282         int pid = tcp->pid;
1283 #endif /* !USE_PROCFS */
1284 #ifdef LINUX
1285 #if defined(S390)
1286         {
1287                 int i;
1288                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1289                         tcp->u_nargs = sysent[tcp->scno].nargs;
1290                 else
1291                         tcp->u_nargs = MAX_ARGS;
1292                 for (i = 0; i < tcp->u_nargs; i++) {
1293                         if (upeek(pid,i==0 ? PT_ORIGGPR2:PT_GPR2+(i<<2), &tcp->u_arg[i]) < 0)
1294                                 return -1;
1295                 }
1296         }
1297 #elif defined (ALPHA)
1298         {
1299                 int i;
1300                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1301                         tcp->u_nargs = sysent[tcp->scno].nargs;
1302                 else
1303                         tcp->u_nargs = MAX_ARGS;
1304                 for (i = 0; i < tcp->u_nargs; i++) {
1305                         /* WTA: if scno is out-of-bounds this will bomb. Add range-check
1306                          * for scno somewhere above here!
1307                          */
1308                         if (upeek(pid, REG_A0+i, &tcp->u_arg[i]) < 0)
1309                                 return -1;
1310                 }
1311         }
1312 #elif defined (IA64)
1313         {
1314                 if (!ia32) {
1315                         unsigned long *out0, *rbs_end, cfm, sof, sol, i;
1316                         /* be backwards compatible with kernel < 2.4.4... */
1317 #                       ifndef PT_RBS_END
1318 #                         define PT_RBS_END     PT_AR_BSP
1319 #                       endif
1320
1321                         if (upeek(pid, PT_RBS_END, (long *) &rbs_end) < 0)
1322                                 return -1;
1323                         if (upeek(pid, PT_CFM, (long *) &cfm) < 0)
1324                                 return -1;
1325
1326                         sof = (cfm >> 0) & 0x7f;
1327                         sol = (cfm >> 7) & 0x7f;
1328                         out0 = ia64_rse_skip_regs(rbs_end, -sof + sol);
1329
1330                         if (tcp->scno >= 0 && tcp->scno < nsyscalls
1331                             && sysent[tcp->scno].nargs != -1)
1332                                 tcp->u_nargs = sysent[tcp->scno].nargs;
1333                         else
1334                                 tcp->u_nargs = MAX_ARGS;
1335                         for (i = 0; i < tcp->u_nargs; ++i) {
1336                                 if (umoven(tcp, (unsigned long) ia64_rse_skip_regs(out0, i),
1337                                            sizeof(long), (char *) &tcp->u_arg[i]) < 0)
1338                                         return -1;
1339                         }
1340                 } else {
1341                         int i;
1342
1343                         if (/* EBX = out0 */
1344                             upeek(pid, PT_R11, (long *) &tcp->u_arg[0]) < 0
1345                             /* ECX = out1 */
1346                             || upeek(pid, PT_R9,  (long *) &tcp->u_arg[1]) < 0
1347                             /* EDX = out2 */
1348                             || upeek(pid, PT_R10, (long *) &tcp->u_arg[2]) < 0
1349                             /* ESI = out3 */
1350                             || upeek(pid, PT_R14, (long *) &tcp->u_arg[3]) < 0
1351                             /* EDI = out4 */
1352                             || upeek(pid, PT_R15, (long *) &tcp->u_arg[4]) < 0
1353                             /* EBP = out5 */
1354                             || upeek(pid, PT_R13, (long *) &tcp->u_arg[5]) < 0)
1355                                 return -1;
1356
1357                         for (i = 0; i < 6; ++i)
1358                                 /* truncate away IVE sign-extension */
1359                                 tcp->u_arg[i] &= 0xffffffff;
1360
1361                         if (tcp->scno >= 0 && tcp->scno < nsyscalls
1362                             && sysent[tcp->scno].nargs != -1)
1363                                 tcp->u_nargs = sysent[tcp->scno].nargs;
1364                         else
1365                                 tcp->u_nargs = 5;
1366                 }
1367         }
1368 #elif defined (MIPS)
1369         {
1370                 long sp;
1371                 int i, nargs;
1372
1373                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1374                         nargs = tcp->u_nargs = sysent[tcp->scno].nargs;
1375                 else
1376                         nargs = tcp->u_nargs = MAX_ARGS;
1377                 if(nargs > 4) {
1378                         if(upeek(pid, REG_SP, &sp) < 0)
1379                                 return -1;
1380                         for(i = 0; i < 4; i++) {
1381                                 if (upeek(pid, REG_A0 + i, &tcp->u_arg[i])<0)
1382                                         return -1;
1383                         }
1384                         umoven(tcp, sp+16, (nargs-4) * sizeof(tcp->u_arg[0]),
1385                                (char *)(tcp->u_arg + 4));
1386                 } else {
1387                         for(i = 0; i < nargs; i++) {
1388                                 if (upeek(pid, REG_A0 + i, &tcp->u_arg[i]) < 0)
1389                                         return -1;
1390                         }
1391                 }
1392         }
1393 #elif defined (POWERPC)
1394         {
1395                 int i;
1396                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1397                         tcp->u_nargs = sysent[tcp->scno].nargs;
1398                 else
1399                         tcp->u_nargs = MAX_ARGS;
1400                 for (i = 0; i < tcp->u_nargs; i++) {
1401                         if (upeek(pid, (i==0) ? (4*PT_ORIG_R3) : ((i+PT_R3)*4), &tcp->u_arg[i]) < 0)
1402                                 return -1;
1403                 }
1404         }
1405 #elif defined (SPARC)
1406         {
1407                 int i;
1408
1409                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1410                         tcp->u_nargs = sysent[tcp->scno].nargs;
1411                 else
1412                         tcp->u_nargs = MAX_ARGS;
1413                 for (i = 0; i < tcp->u_nargs; i++)
1414                         tcp->u_arg[i] = *((&regs.r_o0) + i);
1415         }
1416 #elif defined (HPPA)
1417         {
1418                 int i;
1419
1420                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1421                         tcp->u_nargs = sysent[tcp->scno].nargs;
1422                 else
1423                         tcp->u_nargs = MAX_ARGS;
1424                 for (i = 0; i < tcp->u_nargs; i++) {
1425                         if (upeek(pid, PT_GR26-4*i, &tcp->u_arg[i]) < 0)
1426                                 return -1;
1427                 }
1428         }
1429 #elif defined(SH)
1430        {
1431                int i;
1432                static int syscall_regs[] = {
1433                    REG_REG0+4, REG_REG0+5, REG_REG0+6, REG_REG0+7,
1434                    REG_REG0, REG_REG0+1, REG_REG0+2
1435                    };
1436
1437                tcp->u_nargs = sysent[tcp->scno].nargs;
1438                for (i = 0; i < tcp->u_nargs; i++) {
1439                        if (upeek(pid, 4*syscall_regs[i], &tcp->u_arg[i]) < 0)
1440                                return -1;
1441                }
1442         }
1443 #else /* Other architecture (like i386) (32bits specific) */
1444         {
1445                 int i;
1446                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1447                         tcp->u_nargs = sysent[tcp->scno].nargs;
1448                 else
1449                         tcp->u_nargs = MAX_ARGS;
1450                 for (i = 0; i < tcp->u_nargs; i++) {
1451                         if (upeek(pid, i*4, &tcp->u_arg[i]) < 0)
1452                                 return -1;
1453                 }
1454         }
1455 #endif
1456 #endif /* LINUX */
1457 #ifdef SUNOS4
1458         {
1459                 int i;
1460                 if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1461                         tcp->u_nargs = sysent[tcp->scno].nargs;
1462                 else
1463                         tcp->u_nargs = MAX_ARGS;
1464                 for (i = 0; i < tcp->u_nargs; i++) {
1465                         struct user *u;
1466
1467                         if (upeek(pid, uoff(u_arg[0]) +
1468                             (i*sizeof(u->u_arg[0])), &tcp->u_arg[i]) < 0)
1469                                 return -1;
1470                 }
1471         }
1472 #endif /* SUNOS4 */
1473 #ifdef SVR4
1474 #ifdef MIPS
1475         /*
1476          * SGI is broken: even though it has pr_sysarg, it doesn't
1477          * set them on system call entry.  Get a clue.
1478          */
1479         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1480                 tcp->u_nargs = sysent[tcp->scno].nargs;
1481         else
1482                 tcp->u_nargs = tcp->status.pr_nsysarg;
1483         if (tcp->u_nargs > 4) {
1484                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1485                         4*sizeof(tcp->u_arg[0]));
1486                 umoven(tcp, tcp->status.pr_reg[CTX_SP] + 16,
1487                         (tcp->u_nargs - 4)*sizeof(tcp->u_arg[0]), (char *) (tcp->u_arg + 4));
1488         }
1489         else {
1490                 memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
1491                         tcp->u_nargs*sizeof(tcp->u_arg[0]));
1492         }
1493 #elif UNIXWARE >= 2
1494         /*
1495          * Like SGI, UnixWare doesn't set pr_sysarg until system call exit
1496          */
1497         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1498                 tcp->u_nargs = sysent[tcp->scno].nargs;
1499         else
1500                 tcp->u_nargs = tcp->status.pr_lwp.pr_nsysarg;
1501         umoven(tcp, tcp->status.PR_REG[UESP] + 4,
1502                 tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
1503 #elif defined (HAVE_PR_SYSCALL)
1504         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1505                 tcp->u_nargs = sysent[tcp->scno].nargs;
1506         else
1507                 tcp->u_nargs = tcp->status.pr_nsysarg;
1508         {
1509                 int i;
1510                 for (i = 0; i < tcp->u_nargs; i++)
1511                         tcp->u_arg[i] = tcp->status.pr_sysarg[i];
1512         }
1513 #elif defined (I386)
1514         if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
1515                 tcp->u_nargs = sysent[tcp->scno].nargs;
1516         else
1517                 tcp->u_nargs = 5;
1518         umoven(tcp, tcp->status.PR_REG[UESP] + 4,
1519                 tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
1520 #else
1521         I DONT KNOW WHAT TO DO
1522 #endif /* !HAVE_PR_SYSCALL */
1523 #endif /* SVR4 */
1524 #ifdef FREEBSD
1525         if (tcp->scno >= 0 && tcp->scno < nsyscalls &&
1526             sysent[tcp->scno].nargs > tcp->status.val)
1527                 tcp->u_nargs = sysent[tcp->scno].nargs;
1528         else
1529                 tcp->u_nargs = tcp->status.val;
1530         if (tcp->u_nargs < 0)
1531                 tcp->u_nargs = 0;
1532         if (tcp->u_nargs > MAX_ARGS)
1533                 tcp->u_nargs = MAX_ARGS;
1534         switch(regs.r_eax) {
1535         case SYS___syscall:
1536                 pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
1537                       regs.r_esp + sizeof(int) + sizeof(quad_t));
1538           break;
1539         case SYS_syscall:
1540                 pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
1541                       regs.r_esp + 2 * sizeof(int));
1542           break;
1543         default:
1544                 pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
1545                       regs.r_esp + sizeof(int));
1546           break;
1547         }
1548 #endif /* FREEBSD */
1549         return 1;
1550 }
1551
1552 int
1553 trace_syscall(tcp)
1554 struct tcb *tcp;
1555 {
1556         int sys_res;
1557         struct timeval tv;
1558         int res;
1559
1560         /* Measure the exit time as early as possible to avoid errors. */
1561         if (dtime && (tcp->flags & TCB_INSYSCALL))
1562                 gettimeofday(&tv, NULL);
1563
1564         res = get_scno(tcp);
1565         if (res != 1)
1566                 return res;
1567
1568         res = syscall_fixup(tcp);
1569         if (res != 1)
1570                 return res;
1571
1572         if (tcp->flags & TCB_INSYSCALL) {
1573                 long u_error;
1574                 res = get_error(tcp);
1575                 if (res != 1)
1576                         return res;
1577                 u_error = tcp->u_error;
1578
1579
1580                 internal_syscall(tcp);
1581                 if (tcp->scno >= 0 && tcp->scno < nsyscalls &&
1582                     !(qual_flags[tcp->scno] & QUAL_TRACE)) {
1583                         tcp->flags &= ~TCB_INSYSCALL;
1584                         return 0;
1585                 }
1586
1587                 if (tcp->flags & TCB_REPRINT) {
1588                         printleader(tcp);
1589                         tprintf("<... ");
1590                         if (tcp->scno >= nsyscalls || tcp->scno < 0)
1591                                 tprintf("syscall_%lu", tcp->scno);
1592                         else
1593                                 tprintf("%s", sysent[tcp->scno].sys_name);
1594                         tprintf(" resumed> ");
1595                 }
1596
1597                 if (cflag && tcp->scno < nsyscalls && tcp->scno >= 0) {
1598                         call_count[tcp->scno]++;
1599                         if (tcp->u_error)
1600                                 error_count[tcp->scno]++;
1601                         tv_sub(&tv, &tv, &tcp->etime);
1602 #ifdef LINUX
1603                         if (tv_cmp(&tv, &tcp->dtime) > 0) {
1604                                 static struct timeval one_tick =
1605                                         { 0, 1000000 / HZ };
1606
1607                                 if (tv_nz(&tcp->dtime))
1608                                         tv = tcp->dtime;
1609                                 else if (tv_cmp(&tv, &one_tick) > 0) {
1610                                         if (tv_cmp(&shortest, &one_tick) < 0)
1611                                                 tv = shortest;
1612                                         else
1613                                                 tv = one_tick;
1614                                 }
1615                         }
1616 #endif /* LINUX */
1617                         if (tv_cmp(&tv, &shortest) < 0)
1618                                 shortest = tv;
1619                         tv_add(&tv_count[tcp->scno],
1620                                 &tv_count[tcp->scno], &tv);
1621                         tcp->flags &= ~TCB_INSYSCALL;
1622                         return 0;
1623                 }
1624
1625                 if (tcp->scno >= nsyscalls || tcp->scno < 0
1626                     || (qual_flags[tcp->scno] & QUAL_RAW))
1627                         sys_res = printargs(tcp);
1628                 else
1629                         sys_res = (*sysent[tcp->scno].sys_func)(tcp);
1630                 u_error = tcp->u_error;
1631                 tprintf(") ");
1632                 tabto(acolumn);
1633                 if (tcp->scno >= nsyscalls || tcp->scno < 0 ||
1634                     qual_flags[tcp->scno] & QUAL_RAW) {
1635                         if (u_error)
1636                                 tprintf("= -1 (errno %ld)", u_error);
1637                         else
1638                                 tprintf("= %#lx", tcp->u_rval);
1639                 }
1640                 else if (!(sys_res & RVAL_NONE) && u_error) {
1641                         switch (u_error) {
1642 #ifdef LINUX
1643                         case ERESTARTSYS:
1644                                 tprintf("= ? ERESTARTSYS (To be restarted)");
1645                                 break;
1646                         case ERESTARTNOINTR:
1647                                 tprintf("= ? ERESTARTNOINTR (To be restarted)");
1648                                 break;
1649                         case ERESTARTNOHAND:
1650                                 tprintf("= ? ERESTARTNOHAND (To be restarted)");
1651                                 break;
1652 #endif /* LINUX */
1653                         default:
1654                                 tprintf("= -1 ");
1655                                 if (u_error < 0)
1656                                         tprintf("E??? (errno %ld)", u_error);
1657                                 else if (u_error < nerrnos && u_error < sys_nerr)
1658                                         tprintf("%s (%s)", errnoent[u_error],
1659                                                 sys_errlist[u_error]);
1660                                 else if (u_error < nerrnos)
1661                                         tprintf("%s (errno %ld)",
1662                                                 errnoent[u_error], u_error);
1663                                 else if (u_error < sys_nerr)
1664                                         tprintf("ERRNO_%ld (%s)", u_error,
1665                                                 sys_errlist[u_error]);
1666                                 else
1667                                         tprintf("E??? (errno %ld)", u_error);
1668                                 break;
1669                         }
1670                 }
1671                 else {
1672                         if (sys_res & RVAL_NONE)
1673                                 tprintf("= ?");
1674                         else {
1675                                 switch (sys_res & RVAL_MASK) {
1676                                 case RVAL_HEX:
1677                                         tprintf("= %#lx", tcp->u_rval);
1678                                         break;
1679                                 case RVAL_OCTAL:
1680                                         tprintf("= %#lo", tcp->u_rval);
1681                                         break;
1682                                 case RVAL_UDECIMAL:
1683                                         tprintf("= %lu", tcp->u_rval);
1684                                         break;
1685                                 case RVAL_DECIMAL:
1686                                         tprintf("= %ld", tcp->u_rval);
1687                                         break;
1688 #ifdef HAVE_LONG_LONG
1689                                 case RVAL_LHEX:
1690                                         tprintf("= %#llx", tcp->u_lrval);
1691                                         break;
1692                                 case RVAL_LOCTAL:
1693                                         tprintf("= %#llo", tcp->u_lrval);
1694                                         break;
1695                                 case RVAL_LUDECIMAL:
1696                                         tprintf("= %llu", tcp->u_lrval);
1697                                         break;
1698                                 case RVAL_LDECIMAL:
1699                                         tprintf("= %lld", tcp->u_lrval);
1700                                         break;
1701 #endif
1702                                 default:
1703                                         fprintf(stderr,
1704                                                 "invalid rval format\n");
1705                                         break;
1706                                 }
1707                         }
1708                         if ((sys_res & RVAL_STR) && tcp->auxstr)
1709                                 tprintf(" (%s)", tcp->auxstr);
1710                 }
1711                 if (dtime) {
1712                         tv_sub(&tv, &tv, &tcp->etime);
1713                         tprintf(" <%ld.%06ld>",
1714                                 (long) tv.tv_sec, (long) tv.tv_usec);
1715                 }
1716                 printtrailer(tcp);
1717
1718                 dumpio(tcp);
1719                 if (fflush(tcp->outf) == EOF)
1720                         return -1;
1721                 tcp->flags &= ~TCB_INSYSCALL;
1722                 return 0;
1723         }
1724
1725         /* Entering system call */
1726         res = syscall_enter(tcp);
1727         if (res != 1)
1728                 return res;
1729
1730         switch (tcp->scno + NR_SYSCALL_BASE) {
1731 #ifdef LINUX
1732 #if !defined (ALPHA) && !defined(SPARC) && !defined(MIPS) && !defined(HPPA)
1733         case SYS_socketcall:
1734                 decode_subcall(tcp, SYS_socket_subcall,
1735                         SYS_socket_nsubcalls, deref_style);
1736                 break;
1737         case SYS_ipc:
1738                 decode_subcall(tcp, SYS_ipc_subcall,
1739                         SYS_ipc_nsubcalls, shift_style);
1740                 break;
1741 #endif /* !ALPHA && !MIPS && !SPARC */
1742 #ifdef SPARC
1743         case SYS_socketcall:
1744                 sparc_socket_decode (tcp);
1745                 break;
1746 #endif
1747 #endif /* LINUX */
1748 #ifdef SVR4
1749 #ifdef SYS_pgrpsys_subcall
1750         case SYS_pgrpsys:
1751                 decode_subcall(tcp, SYS_pgrpsys_subcall,
1752                         SYS_pgrpsys_nsubcalls, shift_style);
1753                 break;
1754 #endif /* SYS_pgrpsys_subcall */
1755 #ifdef SYS_sigcall_subcall
1756         case SYS_sigcall:
1757                 decode_subcall(tcp, SYS_sigcall_subcall,
1758                         SYS_sigcall_nsubcalls, mask_style);
1759                 break;
1760 #endif /* SYS_sigcall_subcall */
1761         case SYS_msgsys:
1762                 decode_subcall(tcp, SYS_msgsys_subcall,
1763                         SYS_msgsys_nsubcalls, shift_style);
1764                 break;
1765         case SYS_shmsys:
1766                 decode_subcall(tcp, SYS_shmsys_subcall,
1767                         SYS_shmsys_nsubcalls, shift_style);
1768                 break;
1769         case SYS_semsys:
1770                 decode_subcall(tcp, SYS_semsys_subcall,
1771                         SYS_semsys_nsubcalls, shift_style);
1772                 break;
1773 #if 0 /* broken */
1774         case SYS_utssys:
1775                 decode_subcall(tcp, SYS_utssys_subcall,
1776                         SYS_utssys_nsubcalls, shift_style);
1777                 break;
1778 #endif
1779         case SYS_sysfs:
1780                 decode_subcall(tcp, SYS_sysfs_subcall,
1781                         SYS_sysfs_nsubcalls, shift_style);
1782                 break;
1783         case SYS_spcall:
1784                 decode_subcall(tcp, SYS_spcall_subcall,
1785                         SYS_spcall_nsubcalls, shift_style);
1786                 break;
1787 #ifdef SYS_context_subcall
1788         case SYS_context:
1789                 decode_subcall(tcp, SYS_context_subcall,
1790                         SYS_context_nsubcalls, shift_style);
1791                 break;
1792 #endif /* SYS_context_subcall */
1793 #ifdef SYS_door_subcall
1794         case SYS_door:
1795                 decode_subcall(tcp, SYS_door_subcall,
1796                         SYS_door_nsubcalls, door_style);
1797                 break;
1798 #endif /* SYS_door_subcall */
1799 #ifdef SYS_kaio_subcall
1800         case SYS_kaio:
1801                 decode_subcall(tcp, SYS_kaio_subcall,
1802                         SYS_kaio_nsubcalls, shift_style);
1803                 break;
1804 #endif
1805 #endif /* SVR4 */
1806 #ifdef FREEBSD
1807         case SYS_msgsys:
1808         case SYS_shmsys:
1809         case SYS_semsys:
1810                 decode_subcall(tcp, 0, 0, table_style);
1811                 break;
1812 #endif
1813 #ifdef SUNOS4
1814         case SYS_semsys:
1815                 decode_subcall(tcp, SYS_semsys_subcall,
1816                         SYS_semsys_nsubcalls, shift_style);
1817                 break;
1818         case SYS_msgsys:
1819                 decode_subcall(tcp, SYS_msgsys_subcall,
1820                         SYS_msgsys_nsubcalls, shift_style);
1821                 break;
1822         case SYS_shmsys:
1823                 decode_subcall(tcp, SYS_shmsys_subcall,
1824                         SYS_shmsys_nsubcalls, shift_style);
1825                 break;
1826 #endif
1827         }
1828
1829         internal_syscall(tcp);
1830         if (tcp->scno >=0 && tcp->scno < nsyscalls && !(qual_flags[tcp->scno] & QUAL_TRACE)) {
1831                 tcp->flags |= TCB_INSYSCALL;
1832                 return 0;
1833         }
1834
1835         if (cflag) {
1836                 gettimeofday(&tcp->etime, NULL);
1837                 tcp->flags |= TCB_INSYSCALL;
1838                 return 0;
1839         }
1840
1841         printleader(tcp);
1842         tcp->flags &= ~TCB_REPRINT;
1843         tcp_last = tcp;
1844         if (tcp->scno >= nsyscalls || tcp->scno < 0)
1845                 tprintf("syscall_%lu(", tcp->scno);
1846         else
1847                 tprintf("%s(", sysent[tcp->scno].sys_name);
1848         if (tcp->scno >= nsyscalls || tcp->scno < 0 ||
1849             ((qual_flags[tcp->scno] & QUAL_RAW) && tcp->scno != SYS_exit))
1850                 sys_res = printargs(tcp);
1851         else
1852                 sys_res = (*sysent[tcp->scno].sys_func)(tcp);
1853         if (fflush(tcp->outf) == EOF)
1854                 return -1;
1855         tcp->flags |= TCB_INSYSCALL;
1856         /* Measure the entrance time as late as possible to avoid errors. */
1857         if (dtime)
1858                 gettimeofday(&tcp->etime, NULL);
1859         return sys_res;
1860 }
1861
1862 int
1863 printargs(tcp)
1864 struct tcb *tcp;
1865 {
1866         if (entering(tcp)) {
1867                 int i;
1868
1869                 for (i = 0; i < tcp->u_nargs; i++)
1870                         tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
1871         }
1872         return 0;
1873 }
1874
1875 long
1876 getrval2(tcp)
1877 struct tcb *tcp;
1878 {
1879         long val = -1;
1880
1881 #ifdef LINUX
1882 #ifdef SPARC
1883         struct regs regs;
1884         if (ptrace(PTRACE_GETREGS,tcp->pid,(char *)&regs,0) < 0)
1885                 return -1;
1886         val = regs.r_o1;
1887 #endif /* SPARC */
1888 #endif /* LINUX */
1889
1890 #ifdef SUNOS4
1891         if (upeek(tcp->pid, uoff(u_rval2), &val) < 0)
1892                 return -1;
1893 #endif /* SUNOS4 */
1894
1895 #ifdef SVR4
1896 #ifdef SPARC
1897         val = tcp->status.PR_REG[R_O1];
1898 #endif /* SPARC */
1899 #ifdef I386
1900         val = tcp->status.PR_REG[EDX];
1901 #endif /* I386 */
1902 #ifdef MIPS
1903         val = tcp->status.PR_REG[CTX_V1];
1904 #endif /* MIPS */
1905 #endif /* SVR4 */
1906 #ifdef FREEBSD
1907         struct reg regs;
1908         pread(tcp->pfd_reg, &regs, sizeof(regs), 0);
1909         val = regs.r_edx;
1910 #endif
1911         return val;
1912 }
1913
1914 /*
1915  * Apparently, indirect system calls have already be converted by ptrace(2),
1916  * so if you see "indir" this program has gone astray.
1917  */
1918 int
1919 sys_indir(tcp)
1920 struct tcb *tcp;
1921 {
1922         int i, scno, nargs;
1923
1924         if (entering(tcp)) {
1925                 if ((scno = tcp->u_arg[0]) > nsyscalls) {
1926                         fprintf(stderr, "Bogus syscall: %u\n", scno);
1927                         return 0;
1928                 }
1929                 nargs = sysent[scno].nargs;
1930                 tprintf("%s", sysent[scno].sys_name);
1931                 for (i = 0; i < nargs; i++)
1932                         tprintf(", %#lx", tcp->u_arg[i+1]);
1933         }
1934         return 0;
1935 }
1936
1937 static int
1938 time_cmp(a, b)
1939 void *a;
1940 void *b;
1941 {
1942         return -tv_cmp(&tv_count[*((int *) a)], &tv_count[*((int *) b)]);
1943 }
1944
1945 static int
1946 syscall_cmp(a, b)
1947 void *a;
1948 void *b;
1949 {
1950         return strcmp(sysent[*((int *) a)].sys_name,
1951                 sysent[*((int *) b)].sys_name);
1952 }
1953
1954 static int
1955 count_cmp(a, b)
1956 void *a;
1957 void *b;
1958 {
1959         int m = call_count[*((int *) a)], n = call_count[*((int *) b)];
1960
1961         return (m < n) ? 1 : (m > n) ? -1 : 0;
1962 }
1963
1964 static int (*sortfun)();
1965 static struct timeval overhead = { -1, -1 };
1966
1967 void
1968 set_sortby(sortby)
1969 char *sortby;
1970 {
1971         if (strcmp(sortby, "time") == 0)
1972                 sortfun = time_cmp;
1973         else if (strcmp(sortby, "calls") == 0)
1974                 sortfun = count_cmp;
1975         else if (strcmp(sortby, "name") == 0)
1976                 sortfun = syscall_cmp;
1977         else if (strcmp(sortby, "nothing") == 0)
1978                 sortfun = NULL;
1979         else {
1980                 fprintf(stderr, "invalid sortby: `%s'\n", sortby);
1981                 exit(1);
1982         }
1983 }
1984
1985 void set_overhead(n)
1986 int n;
1987 {
1988         overhead.tv_sec = n / 1000000;
1989         overhead.tv_usec = n % 1000000;
1990 }
1991
1992 void
1993 call_summary(outf)
1994 FILE *outf;
1995 {
1996         int i, j;
1997         int call_cum, error_cum;
1998         struct timeval tv_cum, dtv;
1999         double percent;
2000         char *dashes = "-------------------------";
2001         char error_str[16];
2002
2003         call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0;
2004         if (overhead.tv_sec == -1) {
2005                 tv_mul(&overhead, &shortest, 8);
2006                 tv_div(&overhead, &overhead, 10);
2007         }
2008         for (i = 0; i < nsyscalls; i++) {
2009                 sorted_count[i] = i;
2010                 if (call_count[i] == 0)
2011                         continue;
2012                 tv_mul(&dtv, &overhead, call_count[i]);
2013                 tv_sub(&tv_count[i], &tv_count[i], &dtv);
2014                 call_cum += call_count[i];
2015                 error_cum += error_count[i];
2016                 tv_add(&tv_cum, &tv_cum, &tv_count[i]);
2017         }
2018         if (sortfun)
2019                 qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun);
2020         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n",
2021                 "% time", "seconds", "usecs/call",
2022                 "calls", "errors", "syscall");
2023         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
2024                 dashes, dashes, dashes, dashes, dashes, dashes);
2025         for (i = 0; i < nsyscalls; i++) {
2026                 j = sorted_count[i];
2027                 if (call_count[j] == 0)
2028                         continue;
2029                 tv_div(&dtv, &tv_count[j], call_count[j]);
2030                 if (error_count[j])
2031                         sprintf(error_str, "%d", error_count[j]);
2032                 else
2033                         error_str[0] = '\0';
2034                 percent = 100.0*tv_float(&tv_count[j])/tv_float(&tv_cum);
2035                 fprintf(outf, "%6.2f %4ld.%06ld %11ld %9d %9.9s %s\n",
2036                         percent, (long) tv_count[j].tv_sec,
2037                         (long) tv_count[j].tv_usec,
2038                         (long) 1000000 * dtv.tv_sec + dtv.tv_usec,
2039                         call_count[j], error_str, sysent[j].sys_name);
2040         }
2041         fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
2042                 dashes, dashes, dashes, dashes, dashes, dashes);
2043         if (error_cum)
2044                 sprintf(error_str, "%d", error_cum);
2045         else
2046                 error_str[0] = '\0';
2047         fprintf(outf, "%6.6s %4ld.%06ld %11.11s %9d %9.9s %s\n",
2048                 "100.00", (long) tv_cum.tv_sec, (long) tv_cum.tv_usec, "",
2049                 call_cum, error_str, "total");
2050 }