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
 174     if (umoven(tcp, tcp->u_arg[0], sizeof u_arg, (char *) u_arg) == -1)
 175             return 0;
 176     return print_mmap(tcp, u_arg);
 177
 178 }
 179 #endif
 180
 181 int
 182 sys_mmap(tcp)
 183 struct tcb *tcp;
 184 {
 185     return print_mmap(tcp, tcp->u_arg);
 186 }
 187
 188 int
 189 sys_munmap(tcp)
 190 struct tcb *tcp;
 191 {
 192         if (entering(tcp)) {
 193                 tprintf("%#lx, %lu",
 194                         tcp->u_arg[0], tcp->u_arg[1]);
 195         }
 196         return 0;
 197 }
 198
 199 int
 200 sys_mprotect(tcp)
 201 struct tcb *tcp;
 202 {
 203         if (entering(tcp)) {
 204                 tprintf("%#lx, %lu, ",
 205                         tcp->u_arg[0], tcp->u_arg[1]);
 206                 if (!printflags(mmap_prot, tcp->u_arg[2]))
 207                         tprintf("PROT_???");
 208         }
 209         return 0;
 210 }
 211
 212 #ifdef LINUX
 213
 214 static struct xlat mremap_flags[] = {
 215         { MREMAP_MAYMOVE, "MREMAP_MAYMOVE" },
 216 };
 217
 218 int
 219 sys_mremap(tcp)
 220 struct tcb *tcp;
 221 {
 222         if (entering(tcp)) {
 223                 tprintf("%#lx, %lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1],
 224                         tcp->u_arg[2]);
 225                 printflags(mremap_flags, tcp->u_arg[3]);
 226         }
 227         return RVAL_HEX;
 228 }
 229
 230 #endif /* LINUX */
 231
 232 #ifdef MS_ASYNC
 233
 234 static struct xlat mctl_sync[] = {
 235         { MS_ASYNC,     "MS_ASYNC"      },
 236         { MS_INVALIDATE,"MS_INVALIDATE" },
 237 #ifdef MS_SYNC
 238         { MS_SYNC,      "MS_SYNC"       },
 239 #endif
 240         { 0,            NULL            },
 241 };
 242
 243 int
 244 sys_msync(tcp)
 245 struct tcb *tcp;
 246 {
 247         if (entering(tcp)) {
 248                 /* addr */
 249                 tprintf("%#lx", tcp->u_arg[0]);
 250                 /* len */
 251                 tprintf(", %lu, ", tcp->u_arg[1]);
 252                 /* flags */
 253                 if (!printflags(mctl_sync, tcp->u_arg[2]))
 254                         tprintf("MS_???");
 255         }
 256         return 0;
 257 }
 258
 259 #endif /* MS_ASYNC */
 260
 261 #ifdef MC_SYNC
 262
 263 static struct xlat mctl_funcs[] = {
 264         { MC_LOCK,      "MC_LOCK"       },
 265         { MC_LOCKAS,    "MC_LOCKAS"     },
 266         { MC_SYNC,      "MC_SYNC"       },
 267         { MC_UNLOCK,    "MC_UNLOCK"     },
 268         { MC_UNLOCKAS,  "MC_UNLOCKAS"   },
 269         { 0,            NULL            },
 270 };
 271
 272 static struct xlat mctl_lockas[] = {
 273         { MCL_CURRENT,  "MCL_CURRENT"   },
 274         { MCL_FUTURE,   "MCL_FUTURE"    },
 275         { 0,            NULL            },
 276 };
 277
 278 int
 279 sys_mctl(tcp)
 280 struct tcb *tcp;
 281 {
 282         int arg, function;
 283
 284         if (entering(tcp)) {
 285                 /* addr */
 286                 tprintf("%#lx", tcp->u_arg[0]);
 287                 /* len */
 288                 tprintf(", %lu, ", tcp->u_arg[1]);
 289                 /* function */
 290                 function = tcp->u_arg[2];
 291                 if (!printflags(mctl_funcs, function))
 292                         tprintf("MC_???");
 293                 /* arg */
 294                 arg = tcp->u_arg[3];
 295                 tprintf(", ");
 296                 switch (function) {
 297                 case MC_SYNC:
 298                         if (!printflags(mctl_sync, arg))
 299                                 tprintf("MS_???");
 300                         break;
 301                 case MC_LOCKAS:
 302                         if (!printflags(mctl_lockas, arg))
 303                                 tprintf("MCL_???");
 304                         break;
 305                 default:
 306                         tprintf("%#x", arg);
 307                         break;
 308                 }
 309         }
 310         return 0;
 311 }
 312
 313 #endif /* MC_SYNC */
 314
 315 int
 316 sys_mincore(tcp)
 317 struct tcb *tcp;
 318 {
 319         int i, len;
 320         char *vec = NULL;
 321
 322         if (entering(tcp)) {
 323                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 324         } else {
 325                 len = tcp->u_arg[1];
 326                 if (syserror(tcp) || tcp->u_arg[2] == 0 ||
 327                         (vec = malloc((u_int)len)) == NULL ||
 328                         umoven(tcp, tcp->u_arg[2], len, vec) < 0)
 329                         tprintf("%#lx", tcp->u_arg[2]);
 330                 else {
 331                         tprintf("[");
 332                         for (i = 0; i < len; i++) {
 333                                 if (abbrev(tcp) && i >= max_strlen) {
 334                                         tprintf("...");
 335                                         break;
 336                                 }
 337                                 tprintf((vec[i] & 1) ? "1" : "0");
 338                         }
 339                         tprintf("]");
 340                 }
 341                 if (vec)
 342                         free(vec);
 343         }
 344         return 0;
 345 }
 346
 347 int
 348 sys_getpagesize(tcp)
 349 struct tcb *tcp;
 350 {
 351         if (exiting(tcp))
 352                 return RVAL_HEX;
 353         return 0;
 354 }
 355
 356 #if defined(LINUX) && defined(__i386__)
 357 int
 358 sys_modify_ldt(tcp)
 359 struct tcb *tcp;
 360 {
 361         if (entering(tcp)) {
 362                 struct modify_ldt_ldt_s copy;
 363                 tprintf("%ld", tcp->u_arg[0]);
 364                 if (tcp->u_arg[1] == 0
 365                                 || tcp->u_arg[2] != sizeof (struct modify_ldt_ldt_s)
 366                                 || umove(tcp, tcp->u_arg[1], &copy) == -1)
 367                         tprintf(", %lx", tcp->u_arg[1]);
 368                 else {
 369                         tprintf(", {entry_number:%d, ", copy.entry_number);
 370                         if (!verbose(tcp))
 371                                 tprintf("...}");
 372                         else {
 373                                 tprintf("base_addr:%#08lx, "
 374                                                 "limit:%d, "
 375                                                 "seg_32bit:%d, "
 376                                                 "contents:%d, "
 377                                                 "read_exec_only:%d, "
 378                                                 "limit_in_pages:%d, "
 379                                                 "seg_not_present:%d, "
 380                                                 "useable:%d}",
 381                                                 copy.base_addr,
 382                                                 copy.limit,
 383                                                 copy.seg_32bit,
 384                                                 copy.contents,
 385                                                 copy.read_exec_only,
 386                                                 copy.limit_in_pages,
 387                                                 copy.seg_not_present,
 388                                                 copy.useable);
 389                         }
 390                 }
 391                 tprintf(", %lu", tcp->u_arg[2]);
 392         }
 393         return 0;
 394 }
 395 #endif /* LINUX && __i386__ */
 396