user/strace/io.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  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  *      $Id$
  31  */
  32
  33 #include "defs.h"
  34
  35 #include <fcntl.h>
  36 #if HAVE_SYS_UIO_H
  37 #include <sys/uio.h>
  38 #endif
  39
  40 #ifdef HAVE_LONG_LONG_OFF_T
  41 /*
  42  * Hacks for systems that have a long long off_t
  43  */
  44
  45 #define sys_pread64     sys_pread
  46 #define sys_pwrite64    sys_pwrite
  47 #endif
  48
  49 int
  50 sys_read(tcp)
  51 struct tcb *tcp;
  52 {
  53         if (entering(tcp)) {
  54                 tprintf("%ld, ", tcp->u_arg[0]);
  55         } else {
  56                 if (syserror(tcp))
  57                         tprintf("%#lx", tcp->u_arg[1]);
  58                 else
  59                         printstr(tcp, tcp->u_arg[1], tcp->u_rval);
  60                 tprintf(", %lu", tcp->u_arg[2]);
  61         }
  62         return 0;
  63 }
  64
  65 int
  66 sys_write(tcp)
  67 struct tcb *tcp;
  68 {
  69         if (entering(tcp)) {
  70                 tprintf("%ld, ", tcp->u_arg[0]);
  71                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
  72                 tprintf(", %lu", tcp->u_arg[2]);
  73         }
  74         return 0;
  75 }
  76
  77 #if HAVE_SYS_UIO_H
  78 void
  79 tprint_iov(tcp, len, addr)
  80 struct tcb * tcp;
  81 unsigned long len;
  82 unsigned long addr;
  83 {
  84 #if defined(LINUX) && SUPPORTED_PERSONALITIES > 1
  85         union {
  86                 struct { u_int32_t base; u_int32_t len; } iov32;
  87                 struct { u_int64_t base; u_int64_t len; } iov64;
  88         } iov;
  89 #define sizeof_iov \
  90   (personality_wordsize[current_personality] == 4 \
  91    ? sizeof(iov.iov32) : sizeof(iov.iov64))
  92 #define iov_iov_base \
  93   (personality_wordsize[current_personality] == 4 \
  94    ? (u_int64_t) iov.iov32.base : iov.iov64.base)
  95 #define iov_iov_len \
  96   (personality_wordsize[current_personality] == 4 \
  97    ? (u_int64_t) iov.iov32.len : iov.iov64.len)
  98 #else
  99         struct iovec iov;
 100 #define sizeof_iov sizeof(iov)
 101 #define iov_iov_base iov.iov_base
 102 #define iov_iov_len iov.iov_len
 103 #endif
 104         unsigned long size, cur, end, abbrev_end;
 105         int failed = 0;
 106
 107         if (!len) {
 108                 tprintf("[]");
 109                 return;
 110         }
 111         size = len * sizeof_iov;
 112         end = addr + size;
 113         if (!verbose(tcp) || size / sizeof_iov != len || end < addr) {
 114                 tprintf("%#lx", addr);
 115                 return;
 116         }
 117         if (abbrev(tcp)) {
 118                 abbrev_end = addr + max_strlen * sizeof_iov;
 119                 if (abbrev_end < addr)
 120                         abbrev_end = end;
 121         } else {
 122                 abbrev_end = end;
 123         }
 124         tprintf("[");
 125         for (cur = addr; cur < end; cur += sizeof_iov) {
 126                 if (cur > addr)
 127                         tprintf(", ");
 128                 if (cur >= abbrev_end) {
 129                         tprintf("...");
 130                         break;
 131                 }
 132                 if (umoven(tcp, cur, sizeof_iov, (char *) &iov) < 0) {
 133                         tprintf("?");
 134                         failed = 1;
 135                         break;
 136                 }
 137                 tprintf("{");
 138                 printstr(tcp, (long) iov_iov_base, iov_iov_len);
 139                 tprintf(", %lu}", (unsigned long)iov_iov_len);
 140         }
 141         tprintf("]");
 142         if (failed)
 143                 tprintf(" %#lx", addr);
 144 #undef sizeof_iov
 145 #undef iov_iov_base
 146 #undef iov_iov_len
 147 }
 148
 149 int
 150 sys_readv(tcp)
 151 struct tcb *tcp;
 152 {
 153         if (entering(tcp)) {
 154                 tprintf("%ld, ", tcp->u_arg[0]);
 155         } else {
 156                 if (syserror(tcp)) {
 157                         tprintf("%#lx, %lu",
 158                                         tcp->u_arg[1], tcp->u_arg[2]);
 159                         return 0;
 160                 }
 161                 tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
 162                 tprintf(", %lu", tcp->u_arg[2]);
 163         }
 164         return 0;
 165 }
 166
 167 int
 168 sys_writev(tcp)
 169 struct tcb *tcp;
 170 {
 171         if (entering(tcp)) {
 172                 tprintf("%ld, ", tcp->u_arg[0]);
 173                 tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
 174                 tprintf(", %lu", tcp->u_arg[2]);
 175         }
 176         return 0;
 177 }
 178 #endif
 179
 180 #if defined(SVR4)
 181
 182 int
 183 sys_pread(tcp)
 184 struct tcb *tcp;
 185 {
 186         if (entering(tcp)) {
 187                 tprintf("%ld, ", tcp->u_arg[0]);
 188         } else {
 189                 if (syserror(tcp))
 190                         tprintf("%#lx", tcp->u_arg[1]);
 191                 else
 192                         printstr(tcp, tcp->u_arg[1], tcp->u_rval);
 193 #if UNIXWARE
 194                 /* off_t is signed int */
 195                 tprintf(", %lu, %ld", tcp->u_arg[2], tcp->u_arg[3]);
 196 #else
 197                 tprintf(", %lu, %llu", tcp->u_arg[2],
 198                         LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
 199 #endif
 200         }
 201         return 0;
 202 }
 203
 204 int
 205 sys_pwrite(tcp)
 206 struct tcb *tcp;
 207 {
 208         if (entering(tcp)) {
 209                 tprintf("%ld, ", tcp->u_arg[0]);
 210                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 211 #if UNIXWARE
 212                 /* off_t is signed int */
 213                 tprintf(", %lu, %ld", tcp->u_arg[2], tcp->u_arg[3]);
 214 #else
 215                 tprintf(", %lu, %llu", tcp->u_arg[2],
 216                         LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
 217 #endif
 218         }
 219         return 0;
 220 }
 221 #endif /* SVR4 */
 222
 223 #ifdef FREEBSD
 224 #include <sys/types.h>
 225 #include <sys/socket.h>
 226
 227 int
 228 sys_sendfile(tcp)
 229 struct tcb *tcp;
 230 {
 231         if (entering(tcp)) {
 232                 tprintf("%ld, %ld, %llu, %lu", tcp->u_arg[0], tcp->u_arg[1],
 233                         LONG_LONG(tcp->u_arg[2], tcp->u_arg[3]),
 234                         tcp->u_arg[4]);
 235         } else {
 236                 off_t offset;
 237
 238                 if (!tcp->u_arg[5])
 239                         tprintf(", NULL");
 240                 else {
 241                         struct sf_hdtr hdtr;
 242
 243                         if (umove(tcp, tcp->u_arg[5], &hdtr) < 0)
 244                                 tprintf(", %#lx", tcp->u_arg[5]);
 245                         else {
 246                                 tprintf(", { ");
 247                                 tprint_iov(tcp, hdtr.hdr_cnt, hdtr.headers);
 248                                 tprintf(", %u, ", hdtr.hdr_cnt);
 249                                 tprint_iov(tcp, hdtr.trl_cnt, hdtr.trailers);
 250                                 tprintf(", %u }", hdtr.hdr_cnt);
 251                         }
 252                 }
 253                 if (!tcp->u_arg[6])
 254                         tprintf(", NULL");
 255                 else if (umove(tcp, tcp->u_arg[6], &offset) < 0)
 256                         tprintf(", %#lx", tcp->u_arg[6]);
 257                 else
 258                         tprintf(", [%llu]", offset);
 259                 tprintf(", %lu", tcp->u_arg[7]);
 260         }
 261         return 0;
 262 }
 263 #endif /* FREEBSD */
 264
 265 #ifdef LINUX
 266
 267 /* The SH4 ABI does allow long longs in odd-numbered registers, but
 268    does not allow them to be split between registers and memory - and
 269    there are only four argument registers for normal functions.  As a
 270    result pread takes an extra padding argument before the offset.  This
 271    was changed late in the 2.4 series (around 2.4.20).  */
 272 #if defined(SH)
 273 #define PREAD_OFFSET_ARG 4
 274 #else
 275 #define PREAD_OFFSET_ARG 3
 276 #endif
 277
 278 int
 279 sys_pread(tcp)
 280 struct tcb *tcp;
 281 {
 282         if (entering(tcp)) {
 283                 tprintf("%ld, ", tcp->u_arg[0]);
 284         } else {
 285                 if (syserror(tcp))
 286                         tprintf("%#lx", tcp->u_arg[1]);
 287                 else
 288                         printstr(tcp, tcp->u_arg[1], tcp->u_rval);
 289                 ALIGN64 (tcp, PREAD_OFFSET_ARG); /* PowerPC alignment restriction */
 290                 tprintf(", %lu, %llu", tcp->u_arg[2],
 291                         *(unsigned long long *)&tcp->u_arg[PREAD_OFFSET_ARG]);
 292         }
 293         return 0;
 294 }
 295
 296 int
 297 sys_pwrite(tcp)
 298 struct tcb *tcp;
 299 {
 300         if (entering(tcp)) {
 301                 tprintf("%ld, ", tcp->u_arg[0]);
 302                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 303                 ALIGN64 (tcp, PREAD_OFFSET_ARG); /* PowerPC alignment restriction */
 304                 tprintf(", %lu, %llu", tcp->u_arg[2],
 305                         *(unsigned long long *)&tcp->u_arg[PREAD_OFFSET_ARG]);
 306         }
 307         return 0;
 308 }
 309
 310 int
 311 sys_sendfile(tcp)
 312 struct tcb *tcp;
 313 {
 314         if (entering(tcp)) {
 315                 off_t offset;
 316
 317                 tprintf("%ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1]);
 318                 if (!tcp->u_arg[2])
 319                         tprintf("NULL");
 320                 else if (umove(tcp, tcp->u_arg[2], &offset) < 0)
 321                         tprintf("%#lx", tcp->u_arg[2]);
 322                 else
 323                         tprintf("[%lu]", offset);
 324                 tprintf(", %lu", tcp->u_arg[3]);
 325         }
 326         return 0;
 327 }
 328
 329 int
 330 sys_sendfile64(tcp)
 331 struct tcb *tcp;
 332 {
 333         if (entering(tcp)) {
 334                 loff_t offset;
 335
 336                 tprintf("%ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1]);
 337                 if (!tcp->u_arg[2])
 338                         tprintf("NULL");
 339                 else if (umove(tcp, tcp->u_arg[2], &offset) < 0)
 340                         tprintf("%#lx", tcp->u_arg[2]);
 341                 else
 342                         tprintf("[%llu]", (unsigned long long int) offset);
 343                 tprintf(", %lu", tcp->u_arg[3]);
 344         }
 345         return 0;
 346 }
 347
 348 #endif /* LINUX */
 349
 350 #if _LFS64_LARGEFILE || HAVE_LONG_LONG_OFF_T
 351 int
 352 sys_pread64(tcp)
 353 struct tcb *tcp;
 354 {
 355         if (entering(tcp)) {
 356                 tprintf("%ld, ", tcp->u_arg[0]);
 357         } else {
 358                 ALIGN64 (tcp, 3);
 359                 if (syserror(tcp))
 360                         tprintf("%#lx", tcp->u_arg[1]);
 361                 else
 362                         printstr(tcp, tcp->u_arg[1], tcp->u_rval);
 363 #ifdef MIPS_LINUXN32
 364                 tprintf(", %lu, %#llx", tcp->u_arg[2], tcp->ext_arg[3]);
 365 #else
 366                 tprintf(", %lu, %#llx", tcp->u_arg[2],
 367                         LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
 368 #endif
 369         }
 370         return 0;
 371 }
 372
 373 int
 374 sys_pwrite64(tcp)
 375 struct tcb *tcp;
 376 {
 377         if (entering(tcp)) {
 378                 ALIGN64 (tcp, 3);
 379                 tprintf("%ld, ", tcp->u_arg[0]);
 380                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 381 #ifdef MIPS_LINUXN32
 382                 tprintf(", %lu, %#llx", tcp->u_arg[2], tcp->ext_arg[3]);
 383 #else
 384                 tprintf(", %lu, %#llx", tcp->u_arg[2],
 385                         LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
 386 #endif
 387         }
 388         return 0;
 389 }
 390 #endif
 391
 392 int
 393 sys_ioctl(tcp)
 394 struct tcb *tcp;
 395 {
 396         const struct ioctlent *iop;
 397
 398         if (entering(tcp)) {
 399                 tprintf("%ld, ", tcp->u_arg[0]);
 400                 iop = ioctl_lookup(tcp->u_arg[1]);
 401                 if (iop) {
 402                         tprintf("%s", iop->symbol);
 403                         while ((iop = ioctl_next_match(iop)))
 404                                 tprintf(" or %s", iop->symbol);
 405                 } else
 406                         tprintf("%#lx", tcp->u_arg[1]);
 407                 ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 408         }
 409         else {
 410                 int ret;
 411                 if (!(ret = ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2])))
 412                         tprintf(", %#lx", tcp->u_arg[2]);
 413                 else
 414                         return ret - 1;
 415         }
 416         return 0;
 417 }