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         { 0,            NULL            },
 138 };
 139
 140 static
 141 int
 142 print_mmap(tcp,u_arg)
 143 struct tcb *tcp;
 144 long *u_arg;
 145 {
 146         if (entering(tcp)) {
 147                 /* addr */
 148                 if (!u_arg[0])
 149                         tprintf("NULL, ");
 150                 else
 151                         tprintf("%#lx, ", u_arg[0]);
 152                 /* len */
 153                 tprintf("%lu, ", u_arg[1]);
 154                 /* prot */
 155                 printflags(mmap_prot, u_arg[2]);
 156                 tprintf(", ");
 157                 /* flags */
 158                 printxval(mmap_flags, u_arg[3] & MAP_TYPE, "MAP_???");
 159                 addflags(mmap_flags, u_arg[3] & ~MAP_TYPE);
 160                 /* fd */
 161                 tprintf(", %ld, ", u_arg[4]);
 162                 /* offset */
 163                 tprintf("%#lx", u_arg[5]);
 164         }
 165         return RVAL_HEX;
 166 }
 167
 168 #ifdef LINUX
 169 int sys_old_mmap(tcp)
 170 struct tcb *tcp;
 171 {
 172     long u_arg[6];
 173     int i, v;
 174
 175 #if     defined(IA64)
 176     /*
 177      *  IA64 processes never call this routine, they only use the
 178      *  new `sys_mmap' interface.  This code converts the integer
 179      *  arguments that the IA32 process pushed onto the stack into
 180      *  longs.
 181      *
 182      *  Note that addresses with bit 31 set will be sign extended.
 183      *  Fortunately, those addresses are not currently being generated
 184      *  for IA32 processes so it's not a problem.
 185      */
 186     for (i = 0; i < 6; i++)
 187         if (umove(tcp, tcp->u_arg[0] + (i * sizeof(int)), &v) == -1)
 188                 return 0;
 189         else
 190                 u_arg[i] = v;
 191 #else   // defined(IA64)
 192     if (umoven(tcp, tcp->u_arg[0], sizeof u_arg, (char *) u_arg) == -1)
 193             return 0;
 194 #endif  // defined(IA64)
 195     return print_mmap(tcp, u_arg);
 196
 197 }
 198 #endif
 199
 200 int
 201 sys_mmap(tcp)
 202 struct tcb *tcp;
 203 {
 204     return print_mmap(tcp, tcp->u_arg);
 205 }
 206
 207 int
 208 sys_munmap(tcp)
 209 struct tcb *tcp;
 210 {
 211         if (entering(tcp)) {
 212                 tprintf("%#lx, %lu",
 213                         tcp->u_arg[0], tcp->u_arg[1]);
 214         }
 215         return 0;
 216 }
 217
 218 int
 219 sys_mprotect(tcp)
 220 struct tcb *tcp;
 221 {
 222         if (entering(tcp)) {
 223                 tprintf("%#lx, %lu, ",
 224                         tcp->u_arg[0], tcp->u_arg[1]);
 225                 if (!printflags(mmap_prot, tcp->u_arg[2]))
 226                         tprintf("PROT_???");
 227         }
 228         return 0;
 229 }
 230
 231 #ifdef LINUX
 232
 233 static struct xlat mremap_flags[] = {
 234         { MREMAP_MAYMOVE, "MREMAP_MAYMOVE" },
 235 };
 236
 237 int
 238 sys_mremap(tcp)
 239 struct tcb *tcp;
 240 {
 241         if (entering(tcp)) {
 242                 tprintf("%#lx, %lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1],
 243                         tcp->u_arg[2]);
 244                 printflags(mremap_flags, tcp->u_arg[3]);
 245         }
 246         return RVAL_HEX;
 247 }
 248
 249 #endif /* LINUX */
 250
 251 #ifdef MS_ASYNC
 252
 253 static struct xlat mctl_sync[] = {
 254         { MS_ASYNC,     "MS_ASYNC"      },
 255         { MS_INVALIDATE,"MS_INVALIDATE" },
 256 #ifdef MS_SYNC
 257         { MS_SYNC,      "MS_SYNC"       },
 258 #endif
 259         { 0,            NULL            },
 260 };
 261
 262 int
 263 sys_msync(tcp)
 264 struct tcb *tcp;
 265 {
 266         if (entering(tcp)) {
 267                 /* addr */
 268                 tprintf("%#lx", tcp->u_arg[0]);
 269                 /* len */
 270                 tprintf(", %lu, ", tcp->u_arg[1]);
 271                 /* flags */
 272                 if (!printflags(mctl_sync, tcp->u_arg[2]))
 273                         tprintf("MS_???");
 274         }
 275         return 0;
 276 }
 277
 278 #endif /* MS_ASYNC */
 279
 280 #ifdef MC_SYNC
 281
 282 static struct xlat mctl_funcs[] = {
 283         { MC_LOCK,      "MC_LOCK"       },
 284         { MC_LOCKAS,    "MC_LOCKAS"     },
 285         { MC_SYNC,      "MC_SYNC"       },
 286         { MC_UNLOCK,    "MC_UNLOCK"     },
 287         { MC_UNLOCKAS,  "MC_UNLOCKAS"   },
 288         { 0,            NULL            },
 289 };
 290
 291 static struct xlat mctl_lockas[] = {
 292         { MCL_CURRENT,  "MCL_CURRENT"   },
 293         { MCL_FUTURE,   "MCL_FUTURE"    },
 294         { 0,            NULL            },
 295 };
 296
 297 int
 298 sys_mctl(tcp)
 299 struct tcb *tcp;
 300 {
 301         int arg, function;
 302
 303         if (entering(tcp)) {
 304                 /* addr */
 305                 tprintf("%#lx", tcp->u_arg[0]);
 306                 /* len */
 307                 tprintf(", %lu, ", tcp->u_arg[1]);
 308                 /* function */
 309                 function = tcp->u_arg[2];
 310                 if (!printflags(mctl_funcs, function))
 311                         tprintf("MC_???");
 312                 /* arg */
 313                 arg = tcp->u_arg[3];
 314                 tprintf(", ");
 315                 switch (function) {
 316                 case MC_SYNC:
 317                         if (!printflags(mctl_sync, arg))
 318                                 tprintf("MS_???");
 319                         break;
 320                 case MC_LOCKAS:
 321                         if (!printflags(mctl_lockas, arg))
 322                                 tprintf("MCL_???");
 323                         break;
 324                 default:
 325                         tprintf("%#x", arg);
 326                         break;
 327                 }
 328         }
 329         return 0;
 330 }
 331
 332 #endif /* MC_SYNC */
 333
 334 int
 335 sys_mincore(tcp)
 336 struct tcb *tcp;
 337 {
 338         int i, len;
 339         char *vec = NULL;
 340
 341         if (entering(tcp)) {
 342                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 343         } else {
 344                 len = tcp->u_arg[1];
 345                 if (syserror(tcp) || tcp->u_arg[2] == 0 ||
 346                         (vec = malloc((u_int)len)) == NULL ||
 347                         umoven(tcp, tcp->u_arg[2], len, vec) < 0)
 348                         tprintf("%#lx", tcp->u_arg[2]);
 349                 else {
 350                         tprintf("[");
 351                         for (i = 0; i < len; i++) {
 352                                 if (abbrev(tcp) && i >= max_strlen) {
 353                                         tprintf("...");
 354                                         break;
 355                                 }
 356                                 tprintf((vec[i] & 1) ? "1" : "0");
 357                         }
 358                         tprintf("]");
 359                 }
 360                 if (vec)
 361                         free(vec);
 362         }
 363         return 0;
 364 }
 365
 366 int
 367 sys_getpagesize(tcp)
 368 struct tcb *tcp;
 369 {
 370         if (exiting(tcp))
 371                 return RVAL_HEX;
 372         return 0;
 373 }
 374
 375 #if defined(LINUX) && defined(__i386__)
 376 int
 377 sys_modify_ldt(tcp)
 378 struct tcb *tcp;
 379 {
 380         if (entering(tcp)) {
 381                 struct modify_ldt_ldt_s copy;
 382                 tprintf("%ld", tcp->u_arg[0]);
 383                 if (tcp->u_arg[1] == 0
 384                                 || tcp->u_arg[2] != sizeof (struct modify_ldt_ldt_s)
 385                                 || umove(tcp, tcp->u_arg[1], &copy) == -1)
 386                         tprintf(", %lx", tcp->u_arg[1]);
 387                 else {
 388                         tprintf(", {entry_number:%d, ", copy.entry_number);
 389                         if (!verbose(tcp))
 390                                 tprintf("...}");
 391                         else {
 392                                 tprintf("base_addr:%#08lx, "
 393                                                 "limit:%d, "
 394                                                 "seg_32bit:%d, "
 395                                                 "contents:%d, "
 396                                                 "read_exec_only:%d, "
 397                                                 "limit_in_pages:%d, "
 398                                                 "seg_not_present:%d, "
 399                                                 "useable:%d}",
 400                                                 copy.base_addr,
 401                                                 copy.limit,
 402                                                 copy.seg_32bit,
 403                                                 copy.contents,
 404                                                 copy.read_exec_only,
 405                                                 copy.limit_in_pages,
 406                                                 copy.seg_not_present,
 407                                                 copy.useable);
 408                         }
 409                 }
 410                 tprintf(", %lu", tcp->u_arg[2]);
 411         }
 412         return 0;
 413 }
 414 #endif /* LINUX && __i386__ */
 415