granicus.if.org Git - strace/blob - mem.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 #ifdef LINUX
  36 #include <linux/mman.h>
  37 #endif
  38 #include <sys/mman.h>
  39
  40 #if defined(LINUX) && defined(__i386__)
  41 #include <asm/ldt.h>
  42 #endif
  43
  44 int
  45 sys_brk(tcp)
  46 struct tcb *tcp;
  47 {
  48         if (entering(tcp)) {
  49                 tprintf("%#lx", tcp->u_arg[0]);
  50         }
  51 #ifdef LINUX
  52         return RVAL_HEX;
  53 #else
  54         return 0;
  55 #endif
  56 }
  57
  58 int
  59 sys_sbrk(tcp)
  60 struct tcb *tcp;
  61 {
  62         if (entering(tcp)) {
  63                 tprintf("%lu", tcp->u_arg[0]);
  64         }
  65         return RVAL_HEX;
  66 }
  67
  68 static struct xlat mmap_prot[] = {
  69         { PROT_NONE,    "PROT_NONE",    },
  70         { PROT_READ,    "PROT_READ"     },
  71         { PROT_WRITE,   "PROT_WRITE"    },
  72         { PROT_EXEC,    "PROT_EXEC"     },
  73         { 0,            NULL            },
  74 };
  75
  76 static struct xlat mmap_flags[] = {
  77         { MAP_SHARED,   "MAP_SHARED"    },
  78         { MAP_PRIVATE,  "MAP_PRIVATE"   },
  79         { MAP_FIXED,    "MAP_FIXED"     },
  80 #ifdef MAP_ANONYMOUS
  81         { MAP_ANONYMOUS,"MAP_ANONYMOUS" },
  82 #endif
  83 #ifdef MAP_RENAME
  84         { MAP_RENAME,   "MAP_RENAME"    },
  85 #endif
  86 #ifdef MAP_NORESERVE
  87         { MAP_NORESERVE,"MAP_NORESERVE" },
  88 #endif
  89         /*
  90          * XXX - this was introduced in SunOS 4.x to distinguish between
  91          * the old pre-4.x "mmap()", which:
  92          *
  93          *      only let you map devices with an "mmap" routine (e.g.,
  94          *      frame buffers) in;
  95          *
  96          *      required you to specify the mapping address;
  97          *
  98          *      returned 0 on success and -1 on failure;
  99          *
 100          * memory and which, and the 4.x "mmap()" which:
 101          *
 102          *      can map plain files;
 103          *
 104          *      can be asked to pick where to map the file;
 105          *
 106          *      returns the address where it mapped the file on success
 107          *      and -1 on failure.
 108          *
 109          * It's not actually used in source code that calls "mmap()"; the
 110          * "mmap()" routine adds it for you.
 111          *
 112          * It'd be nice to come up with some way of eliminating it from
 113          * the flags, e.g. reporting calls *without* it as "old_mmap()"
 114          * and calls with it as "mmap()".
 115          */
 116 #ifdef _MAP_NEW
 117         { _MAP_NEW,     "_MAP_NEW"      },
 118 #endif
 119 #ifdef MAP_GROWSDOWN
 120         { MAP_GROWSDOWN,"MAP_GROWSDOWN" },
 121 #endif
 122 #ifdef MAP_DENYWRITE
 123         { MAP_DENYWRITE,"MAP_DENYWRITE" },
 124 #endif
 125 #ifdef MAP_EXECUTABLE
 126         { MAP_EXECUTABLE,"MAP_EXECUTABLE"},
 127 #endif
 128 #ifdef MAP_INHERIT
 129         { MAP_INHERIT,"MAP_INHERIT"     },
 130 #endif
 131 #ifdef MAP_FILE
 132         { MAP_FILE,"MAP_FILE"},
 133 #endif
 134 #ifdef MAP_LOCKED
 135         { MAP_LOCKED,"MAP_LOCKED"},
 136 #endif
 137         /* FreeBSD ones */
 138 #ifdef MAP_ANON
 139         { MAP_ANON,             "MAP_ANON"      },
 140 #endif
 141 #ifdef MAP_HASSEMAPHORE
 142         { MAP_HASSEMAPHORE,     "MAP_HASSEMAPHORE"      },
 143 #endif
 144 #ifdef MAP_STACK
 145         { MAP_STACK,            "MAP_STACK"     },
 146 #endif
 147 #ifdef MAP_NOSYNC
 148         { MAP_NOSYNC,           "MAP_NOSYNC"    },
 149 #endif
 150 #ifdef MAP_NOCORE
 151         { MAP_NOCORE,           "MAP_NOCORE"    },
 152 #endif
 153         { 0,            NULL            },
 154 };
 155
 156 static
 157 int
 158 print_mmap(tcp,u_arg)
 159 struct tcb *tcp;
 160 long *u_arg;
 161 {
 162         if (entering(tcp)) {
 163                 /* addr */
 164                 if (!u_arg[0])
 165                         tprintf("NULL, ");
 166                 else
 167                         tprintf("%#lx, ", u_arg[0]);
 168                 /* len */
 169                 tprintf("%lu, ", u_arg[1]);
 170                 /* prot */
 171                 printflags(mmap_prot, u_arg[2]);
 172                 tprintf(", ");
 173                 /* flags */
 174 #ifdef MAP_TYPE
 175                 printxval(mmap_flags, u_arg[3] & MAP_TYPE, "MAP_???");
 176                 addflags(mmap_flags, u_arg[3] & ~MAP_TYPE);
 177 #else
 178                 printflags(mmap_flags, u_arg[3]);
 179 #endif
 180                 /* fd */
 181                 tprintf(", %ld, ", u_arg[4]);
 182                 /* offset */
 183                 tprintf("%#lx", u_arg[5]);
 184         }
 185         return RVAL_HEX;
 186 }
 187
 188 #ifdef LINUX
 189 int sys_old_mmap(tcp)
 190 struct tcb *tcp;
 191 {
 192     long u_arg[6];
 193
 194 #if     defined(IA64)
 195     int i, v;
 196     /*
 197      *  IA64 processes never call this routine, they only use the
 198      *  new `sys_mmap' interface.  This code converts the integer
 199      *  arguments that the IA32 process pushed onto the stack into
 200      *  longs.
 201      *
 202      *  Note that addresses with bit 31 set will be sign extended.
 203      *  Fortunately, those addresses are not currently being generated
 204      *  for IA32 processes so it's not a problem.
 205      */
 206     for (i = 0; i < 6; i++)
 207         if (umove(tcp, tcp->u_arg[0] + (i * sizeof(int)), &v) == -1)
 208                 return 0;
 209         else
 210                 u_arg[i] = v;
 211 #else   // defined(IA64)
 212     if (umoven(tcp, tcp->u_arg[0], sizeof u_arg, (char *) u_arg) == -1)
 213             return 0;
 214 #endif  // defined(IA64)
 215     return print_mmap(tcp, u_arg);
 216
 217 }
 218 #endif
 219
 220 int
 221 sys_mmap(tcp)
 222 struct tcb *tcp;
 223 {
 224     return print_mmap(tcp, tcp->u_arg);
 225 }
 226
 227 int
 228 sys_munmap(tcp)
 229 struct tcb *tcp;
 230 {
 231         if (entering(tcp)) {
 232                 tprintf("%#lx, %lu",
 233                         tcp->u_arg[0], tcp->u_arg[1]);
 234         }
 235         return 0;
 236 }
 237
 238 int
 239 sys_mprotect(tcp)
 240 struct tcb *tcp;
 241 {
 242         if (entering(tcp)) {
 243                 tprintf("%#lx, %lu, ",
 244                         tcp->u_arg[0], tcp->u_arg[1]);
 245                 if (!printflags(mmap_prot, tcp->u_arg[2]))
 246                         tprintf("PROT_???");
 247         }
 248         return 0;
 249 }
 250
 251 #ifdef LINUX
 252
 253 static struct xlat mremap_flags[] = {
 254         { MREMAP_MAYMOVE,       "MREMAP_MAYMOVE"        },
 255         { 0,                    NULL                    }
 256 };
 257
 258 int
 259 sys_mremap(tcp)
 260 struct tcb *tcp;
 261 {
 262         if (entering(tcp)) {
 263                 tprintf("%#lx, %lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1],
 264                         tcp->u_arg[2]);
 265                 printflags(mremap_flags, tcp->u_arg[3]);
 266         }
 267         return RVAL_HEX;
 268 }
 269
 270 static struct xlat madvise_flags[] = {
 271 #ifdef MADV_NORMAL
 272         { MADV_NORMAL,          "MADV_NORMAL" },
 273 #endif
 274 #ifdef MADZV_RANDOM
 275         { MADV_RANDOM,          "MADV_RANDOM" },
 276 #endif
 277 #ifdef MADV_SEQUENTIAL
 278         { MADV_SEQUENTIAL,      "MADV_SEQUENTIAL" },
 279 #endif
 280 #ifdef MADV_WILLNEED
 281         { MADV_WILLNEED,        "MADV_WILLNEED" },
 282 #endif
 283 #ifdef MADV_DONTNED
 284         { MADV_DONTNEED,        "MADV_DONTNEED" },
 285 #endif
 286         { 0,                    NULL },
 287 };
 288
 289
 290 int
 291 sys_madvise(tcp)
 292 struct tcb *tcp;
 293 {
 294         if (entering(tcp)) {
 295                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 296                 printflags(madvise_flags, tcp->u_arg[2]);
 297         }
 298         return 0;
 299 }
 300
 301
 302 static struct xlat mlockall_flags[] = {
 303 #ifdef MCL_CURRENT
 304         { MCL_CURRENT,  "MCL_CURRENT" },
 305 #endif
 306 #ifdef MCL_FUTURE
 307         { MCL_FUTURE,   "MCL_FUTURE" },
 308 #endif
 309         { 0,            NULL}
 310 };
 311
 312 int
 313 sys_mlockall(tcp)
 314 struct tcb *tcp;
 315 {
 316         if (entering(tcp)) {
 317                 printflags(mlockall_flags, tcp->u_arg[0]);
 318         }
 319         return 0;
 320 }
 321
 322
 323 #endif /* LINUX */
 324
 325 #ifdef MS_ASYNC
 326
 327 static struct xlat mctl_sync[] = {
 328         { MS_ASYNC,     "MS_ASYNC"      },
 329         { MS_INVALIDATE,"MS_INVALIDATE" },
 330 #ifdef MS_SYNC
 331         { MS_SYNC,      "MS_SYNC"       },
 332 #endif
 333         { 0,            NULL            },
 334 };
 335
 336 int
 337 sys_msync(tcp)
 338 struct tcb *tcp;
 339 {
 340         if (entering(tcp)) {
 341                 /* addr */
 342                 tprintf("%#lx", tcp->u_arg[0]);
 343                 /* len */
 344                 tprintf(", %lu, ", tcp->u_arg[1]);
 345                 /* flags */
 346                 if (!printflags(mctl_sync, tcp->u_arg[2]))
 347                         tprintf("MS_???");
 348         }
 349         return 0;
 350 }
 351
 352 #endif /* MS_ASYNC */
 353
 354 #ifdef MC_SYNC
 355
 356 static struct xlat mctl_funcs[] = {
 357         { MC_LOCK,      "MC_LOCK"       },
 358         { MC_LOCKAS,    "MC_LOCKAS"     },
 359         { MC_SYNC,      "MC_SYNC"       },
 360         { MC_UNLOCK,    "MC_UNLOCK"     },
 361         { MC_UNLOCKAS,  "MC_UNLOCKAS"   },
 362         { 0,            NULL            },
 363 };
 364
 365 static struct xlat mctl_lockas[] = {
 366         { MCL_CURRENT,  "MCL_CURRENT"   },
 367         { MCL_FUTURE,   "MCL_FUTURE"    },
 368         { 0,            NULL            },
 369 };
 370
 371 int
 372 sys_mctl(tcp)
 373 struct tcb *tcp;
 374 {
 375         int arg, function;
 376
 377         if (entering(tcp)) {
 378                 /* addr */
 379                 tprintf("%#lx", tcp->u_arg[0]);
 380                 /* len */
 381                 tprintf(", %lu, ", tcp->u_arg[1]);
 382                 /* function */
 383                 function = tcp->u_arg[2];
 384                 if (!printflags(mctl_funcs, function))
 385                         tprintf("MC_???");
 386                 /* arg */
 387                 arg = tcp->u_arg[3];
 388                 tprintf(", ");
 389                 switch (function) {
 390                 case MC_SYNC:
 391                         if (!printflags(mctl_sync, arg))
 392                                 tprintf("MS_???");
 393                         break;
 394                 case MC_LOCKAS:
 395                         if (!printflags(mctl_lockas, arg))
 396                                 tprintf("MCL_???");
 397                         break;
 398                 default:
 399                         tprintf("%#x", arg);
 400                         break;
 401                 }
 402         }
 403         return 0;
 404 }
 405
 406 #endif /* MC_SYNC */
 407
 408 int
 409 sys_mincore(tcp)
 410 struct tcb *tcp;
 411 {
 412         int i, len;
 413         char *vec = NULL;
 414
 415         if (entering(tcp)) {
 416                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 417         } else {
 418                 len = tcp->u_arg[1];
 419                 if (syserror(tcp) || tcp->u_arg[2] == 0 ||
 420                         (vec = malloc((u_int)len)) == NULL ||
 421                         umoven(tcp, tcp->u_arg[2], len, vec) < 0)
 422                         tprintf("%#lx", tcp->u_arg[2]);
 423                 else {
 424                         tprintf("[");
 425                         for (i = 0; i < len; i++) {
 426                                 if (abbrev(tcp) && i >= max_strlen) {
 427                                         tprintf("...");
 428                                         break;
 429                                 }
 430                                 tprintf((vec[i] & 1) ? "1" : "0");
 431                         }
 432                         tprintf("]");
 433                 }
 434                 if (vec)
 435                         free(vec);
 436         }
 437         return 0;
 438 }
 439
 440 int
 441 sys_getpagesize(tcp)
 442 struct tcb *tcp;
 443 {
 444         if (exiting(tcp))
 445                 return RVAL_HEX;
 446         return 0;
 447 }
 448
 449 #if defined(LINUX) && defined(__i386__)
 450 int
 451 sys_modify_ldt(tcp)
 452 struct tcb *tcp;
 453 {
 454         if (entering(tcp)) {
 455                 struct modify_ldt_ldt_s copy;
 456                 tprintf("%ld", tcp->u_arg[0]);
 457                 if (tcp->u_arg[1] == 0
 458                                 || tcp->u_arg[2] != sizeof (struct modify_ldt_ldt_s)
 459                                 || umove(tcp, tcp->u_arg[1], &copy) == -1)
 460                         tprintf(", %lx", tcp->u_arg[1]);
 461                 else {
 462                         tprintf(", {entry_number:%d, ", copy.entry_number);
 463                         if (!verbose(tcp))
 464                                 tprintf("...}");
 465                         else {
 466                                 tprintf("base_addr:%#08lx, "
 467                                                 "limit:%d, "
 468                                                 "seg_32bit:%d, "
 469                                                 "contents:%d, "
 470                                                 "read_exec_only:%d, "
 471                                                 "limit_in_pages:%d, "
 472                                                 "seg_not_present:%d, "
 473                                                 "useable:%d}",
 474                                                 copy.base_addr,
 475                                                 copy.limit,
 476                                                 copy.seg_32bit,
 477                                                 copy.contents,
 478                                                 copy.read_exec_only,
 479                                                 copy.limit_in_pages,
 480                                                 copy.seg_not_present,
 481                                                 copy.useable);
 482                         }
 483                 }
 484                 tprintf(", %lu", tcp->u_arg[2]);
 485         }
 486         return 0;
 487 }
 488 #endif /* LINUX && __i386__ */
 489