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   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) 2000 PocketPenguins Inc.  Linux for Hitachi SuperH
   7  *                    port by Greg Banks <gbanks@pocketpenguins.com>
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. The name of the author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include "defs.h"
  34 #include <asm/mman.h>
  35 #include <sys/mman.h>
  36
  37 unsigned long
  38 get_pagesize(void)
  39 {
  40         static unsigned long pagesize;
  41
  42         if (!pagesize)
  43                 pagesize = sysconf(_SC_PAGESIZE);
  44         return pagesize;
  45 }
  46
  47 SYS_FUNC(brk)
  48 {
  49         printaddr(tcp->u_arg[0]);
  50
  51         return RVAL_DECODED | RVAL_HEX;
  52 }
  53
  54 #include "xlat/mmap_prot.h"
  55 #include "xlat/mmap_flags.h"
  56
  57 static void
  58 print_mmap(struct tcb *tcp, long *u_arg, unsigned long long offset)
  59 {
  60         const unsigned long addr = u_arg[0];
  61         const unsigned long len = u_arg[1];
  62         const unsigned long prot = u_arg[2];
  63         const unsigned long flags = u_arg[3];
  64         const int fd = u_arg[4];
  65
  66         printaddr(addr);
  67         tprintf(", %lu, ", len);
  68         printflags(mmap_prot, prot, "PROT_???");
  69         tprints(", ");
  70 #ifdef MAP_TYPE
  71         printxval(mmap_flags, flags & MAP_TYPE, "MAP_???");
  72         addflags(mmap_flags, flags & ~MAP_TYPE);
  73 #else
  74         printflags(mmap_flags, flags, "MAP_???");
  75 #endif
  76         tprints(", ");
  77         printfd(tcp, fd);
  78         tprintf(", %#llx", offset);
  79 }
  80
  81 /* Syscall name<->function correspondence is messed up on many arches.
  82  * For example:
  83  * i386 has __NR_mmap == 90, and it is "old mmap", and
  84  * also it has __NR_mmap2 == 192, which is a "new mmap with page offsets".
  85  * But x86_64 has just one __NR_mmap == 9, a "new mmap with byte offsets".
  86  * Confused? Me too!
  87  */
  88
  89 #if defined AARCH64 || defined ARM \
  90  || defined I386 || defined X86_64 || defined X32 \
  91  || defined M68K \
  92  || defined S390 || defined S390X
  93 /* Params are pointed to by u_arg[0], offset is in bytes */
  94 SYS_FUNC(old_mmap)
  95 {
  96         long u_arg[6];
  97 # if defined AARCH64 || defined X86_64
  98         /* We are here only in a 32-bit personality. */
  99         unsigned int narrow_arg[6];
 100         if (umove_or_printaddr(tcp, tcp->u_arg[0], &narrow_arg))
 101                 return RVAL_DECODED | RVAL_HEX;
 102         unsigned int i;
 103         for (i = 0; i < 6; i++)
 104                 u_arg[i] = narrow_arg[i];
 105 # else
 106         if (umove_or_printaddr(tcp, tcp->u_arg[0], &u_arg))
 107                 return RVAL_DECODED | RVAL_HEX;
 108 # endif
 109         print_mmap(tcp, u_arg, (unsigned long) u_arg[5]);
 110
 111         return RVAL_DECODED | RVAL_HEX;
 112 }
 113 #endif /* old_mmap architectures */
 114
 115 #if defined(S390)
 116 /* Params are pointed to by u_arg[0], offset is in pages */
 117 SYS_FUNC(old_mmap_pgoff)
 118 {
 119         long u_arg[5];
 120         int i;
 121         unsigned narrow_arg[6];
 122         unsigned long long offset;
 123         if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), narrow_arg) == -1)
 124                 return 0;
 125         for (i = 0; i < 5; i++)
 126                 u_arg[i] = (unsigned long) narrow_arg[i];
 127         offset = narrow_arg[5];
 128         offset *= get_pagesize();
 129         print_mmap(tcp, u_arg, offset);
 130
 131         return RVAL_DECODED | RVAL_HEX;
 132 }
 133 #endif
 134
 135 /* Params are passed directly, offset is in bytes */
 136 SYS_FUNC(mmap)
 137 {
 138         unsigned long long offset = (unsigned long) tcp->u_arg[5];
 139 #if defined(LINUX_MIPSN32) || defined(X32)
 140         /* Try test/x32_mmap.c */
 141         offset = tcp->ext_arg[5];
 142 #endif
 143         /* Example of kernel-side handling of this variety of mmap:
 144          * arch/x86/kernel/sys_x86_64.c::SYSCALL_DEFINE6(mmap, ...) calls
 145          * sys_mmap_pgoff(..., off >> PAGE_SHIFT); i.e. off is in bytes,
 146          * since the above code converts off to pages.
 147          */
 148         print_mmap(tcp, tcp->u_arg, offset);
 149
 150         return RVAL_DECODED | RVAL_HEX;
 151 }
 152
 153 /* Params are passed directly, offset is in pages */
 154 SYS_FUNC(mmap_pgoff)
 155 {
 156         /* Try test/mmap_offset_decode.c */
 157         unsigned long long offset;
 158         offset = (unsigned long) tcp->u_arg[5];
 159         offset *= get_pagesize();
 160         print_mmap(tcp, tcp->u_arg, offset);
 161
 162         return RVAL_DECODED | RVAL_HEX;
 163 }
 164
 165 /* Params are passed directly, offset is in 4k units */
 166 SYS_FUNC(mmap_4koff)
 167 {
 168         unsigned long long offset;
 169         offset = (unsigned long) tcp->u_arg[5];
 170         offset <<= 12;
 171         print_mmap(tcp, tcp->u_arg, offset);
 172
 173         return RVAL_DECODED | RVAL_HEX;
 174 }
 175
 176 SYS_FUNC(munmap)
 177 {
 178         printaddr(tcp->u_arg[0]);
 179         tprintf(", %lu", tcp->u_arg[1]);
 180
 181         return RVAL_DECODED;
 182 }
 183
 184 SYS_FUNC(mprotect)
 185 {
 186         printaddr(tcp->u_arg[0]);
 187         tprintf(", %lu, ", tcp->u_arg[1]);
 188         printflags(mmap_prot, tcp->u_arg[2], "PROT_???");
 189
 190         return RVAL_DECODED;
 191 }
 192
 193 #include "xlat/mremap_flags.h"
 194
 195 SYS_FUNC(mremap)
 196 {
 197         printaddr(tcp->u_arg[0]);
 198         tprintf(", %lu, %lu, ", tcp->u_arg[1], tcp->u_arg[2]);
 199         printflags(mremap_flags, tcp->u_arg[3], "MREMAP_???");
 200 #ifdef MREMAP_FIXED
 201         if ((tcp->u_arg[3] & (MREMAP_MAYMOVE | MREMAP_FIXED)) ==
 202             (MREMAP_MAYMOVE | MREMAP_FIXED)) {
 203                 tprints(", ");
 204                 printaddr(tcp->u_arg[4]);
 205         }
 206 #endif
 207         return RVAL_DECODED | RVAL_HEX;
 208 }
 209
 210 #include "xlat/madvise_cmds.h"
 211
 212 SYS_FUNC(madvise)
 213 {
 214         printaddr(tcp->u_arg[0]);
 215         tprintf(", %lu, ", tcp->u_arg[1]);
 216         printxval(madvise_cmds, tcp->u_arg[2], "MADV_???");
 217
 218         return RVAL_DECODED;
 219 }
 220
 221 #include "xlat/mlockall_flags.h"
 222
 223 SYS_FUNC(mlockall)
 224 {
 225         printflags(mlockall_flags, tcp->u_arg[0], "MCL_???");
 226
 227         return RVAL_DECODED;
 228 }
 229
 230 #include "xlat/mctl_sync.h"
 231
 232 SYS_FUNC(msync)
 233 {
 234         /* addr */
 235         printaddr(tcp->u_arg[0]);
 236         /* len */
 237         tprintf(", %lu, ", tcp->u_arg[1]);
 238         /* flags */
 239         printflags(mctl_sync, tcp->u_arg[2], "MS_???");
 240
 241         return RVAL_DECODED;
 242 }
 243
 244 #include "xlat/mlock_flags.h"
 245
 246 SYS_FUNC(mlock2)
 247 {
 248         printaddr(tcp->u_arg[0]);
 249         tprintf(", %lu, ", tcp->u_arg[1]);
 250         printflags(mlock_flags, tcp->u_arg[2], "MLOCK_???");
 251
 252         return RVAL_DECODED;
 253 }
 254
 255 SYS_FUNC(mincore)
 256 {
 257         if (entering(tcp)) {
 258                 printaddr(tcp->u_arg[0]);
 259                 tprintf(", %lu, ", tcp->u_arg[1]);
 260         } else {
 261                 const unsigned long page_size = get_pagesize();
 262                 const unsigned long page_mask = page_size - 1;
 263                 unsigned long len = tcp->u_arg[1];
 264                 unsigned char *vec = NULL;
 265
 266                 len = len / page_size + (len & page_mask ? 1 : 0);
 267                 if (syserror(tcp) || !verbose(tcp) ||
 268                     !tcp->u_arg[2] || !(vec = malloc(len)) ||
 269                     umoven(tcp, tcp->u_arg[2], len, vec) < 0)
 270                         printaddr(tcp->u_arg[2]);
 271                 else {
 272                         unsigned long i;
 273                         tprints("[");
 274                         for (i = 0; i < len; i++) {
 275                                 if (abbrev(tcp) && i >= max_strlen) {
 276                                         tprints("...");
 277                                         break;
 278                                 }
 279                                 tprints((vec[i] & 1) ? "1" : "0");
 280                         }
 281                         tprints("]");
 282                 }
 283                 free(vec);
 284         }
 285         return 0;
 286 }
 287
 288 #if defined ALPHA || defined IA64 || defined M68K \
 289  || defined SPARC || defined SPARC64
 290 SYS_FUNC(getpagesize)
 291 {
 292         return RVAL_DECODED | RVAL_HEX;
 293 }
 294 #endif
 295
 296 SYS_FUNC(remap_file_pages)
 297 {
 298         const unsigned long addr = tcp->u_arg[0];
 299         const unsigned long size = tcp->u_arg[1];
 300         const unsigned long prot = tcp->u_arg[2];
 301         const unsigned long pgoff = tcp->u_arg[3];
 302         const unsigned long flags = tcp->u_arg[4];
 303
 304         printaddr(addr);
 305         tprintf(", %lu, ", size);
 306         printflags(mmap_prot, prot, "PROT_???");
 307         tprintf(", %lu, ", pgoff);
 308 #ifdef MAP_TYPE
 309         printxval(mmap_flags, flags & MAP_TYPE, "MAP_???");
 310         addflags(mmap_flags, flags & ~MAP_TYPE);
 311 #else
 312         printflags(mmap_flags, flags, "MAP_???");
 313 #endif
 314
 315         return RVAL_DECODED;
 316 }
 317
 318 #define MPOL_DEFAULT    0
 319 #define MPOL_PREFERRED  1
 320 #define MPOL_BIND       2
 321 #define MPOL_INTERLEAVE 3
 322
 323 #define MPOL_F_NODE     (1<<0)
 324 #define MPOL_F_ADDR     (1<<1)
 325
 326 #define MPOL_MF_STRICT  (1<<0)
 327 #define MPOL_MF_MOVE    (1<<1)
 328 #define MPOL_MF_MOVE_ALL (1<<2)
 329
 330 #include "xlat/policies.h"
 331 #include "xlat/mbindflags.h"
 332 #include "xlat/mempolicyflags.h"
 333 #include "xlat/move_pages_flags.h"
 334
 335 static void
 336 get_nodes(struct tcb *tcp, unsigned long ptr, unsigned long maxnodes, int err)
 337 {
 338         unsigned long nlongs, size, end;
 339
 340         nlongs = (maxnodes + 8 * sizeof(long) - 1) / (8 * sizeof(long));
 341         size = nlongs * sizeof(long);
 342         end = ptr + size;
 343         if (nlongs == 0 || ((err || verbose(tcp)) && (size * 8 == maxnodes)
 344                             && (end > ptr))) {
 345                 unsigned long n, cur, abbrev_end;
 346                 int failed = 0;
 347
 348                 if (abbrev(tcp)) {
 349                         abbrev_end = ptr + max_strlen * sizeof(long);
 350                         if (abbrev_end < ptr)
 351                                 abbrev_end = end;
 352                 } else {
 353                         abbrev_end = end;
 354                 }
 355                 tprints(", {");
 356                 for (cur = ptr; cur < end; cur += sizeof(long)) {
 357                         if (cur > ptr)
 358                                 tprints(", ");
 359                         if (cur >= abbrev_end) {
 360                                 tprints("...");
 361                                 break;
 362                         }
 363                         if (umoven(tcp, cur, sizeof(n), &n) < 0) {
 364                                 tprints("?");
 365                                 failed = 1;
 366                                 break;
 367                         }
 368                         tprintf("%#0*lx", (int) sizeof(long) * 2 + 2, n);
 369                 }
 370                 tprints("}");
 371                 if (failed) {
 372                         tprints(" ");
 373                         printaddr(ptr);
 374                 }
 375         } else {
 376                 tprints(" ");
 377                 printaddr(ptr);
 378         }
 379         tprintf(", %lu", maxnodes);
 380 }
 381
 382 SYS_FUNC(mbind)
 383 {
 384         printaddr(tcp->u_arg[0]);
 385         tprintf(", %lu, ", tcp->u_arg[1]);
 386         printxval(policies, tcp->u_arg[2], "MPOL_???");
 387         get_nodes(tcp, tcp->u_arg[3], tcp->u_arg[4], 0);
 388         tprints(", ");
 389         printflags(mbindflags, tcp->u_arg[5], "MPOL_???");
 390
 391         return RVAL_DECODED;
 392 }
 393
 394 SYS_FUNC(set_mempolicy)
 395 {
 396         printxval(policies, tcp->u_arg[0], "MPOL_???");
 397         get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], 0);
 398
 399         return RVAL_DECODED;
 400 }
 401
 402 SYS_FUNC(get_mempolicy)
 403 {
 404         if (exiting(tcp)) {
 405                 int pol;
 406                 if (!umove_or_printaddr(tcp, tcp->u_arg[0], &pol))
 407                         printxval(policies, pol, "MPOL_???");
 408                 get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], syserror(tcp));
 409                 tprints(", ");
 410                 printaddr(tcp->u_arg[3]);
 411                 tprints(", ");
 412                 printflags(mempolicyflags, tcp->u_arg[4], "MPOL_???");
 413         }
 414         return 0;
 415 }
 416
 417 SYS_FUNC(migrate_pages)
 418 {
 419         tprintf("%ld, ", (long) (pid_t) tcp->u_arg[0]);
 420         get_nodes(tcp, tcp->u_arg[2], tcp->u_arg[1], 0);
 421         tprints(", ");
 422         get_nodes(tcp, tcp->u_arg[3], tcp->u_arg[1], 0);
 423
 424         return RVAL_DECODED;
 425 }
 426
 427 SYS_FUNC(move_pages)
 428 {
 429         if (entering(tcp)) {
 430                 unsigned long npages = tcp->u_arg[1];
 431                 tprintf("%ld, %lu, ", tcp->u_arg[0], npages);
 432                 if (tcp->u_arg[2] == 0)
 433                         tprints("NULL, ");
 434                 else {
 435                         unsigned int i;
 436                         long puser = tcp->u_arg[2];
 437                         tprints("{");
 438                         for (i = 0; i < npages; ++i) {
 439                                 void *p;
 440                                 if (i > 0)
 441                                         tprints(", ");
 442                                 if (umove(tcp, puser, &p) < 0) {
 443                                         tprints("???");
 444                                         break;
 445                                 }
 446                                 tprintf("%p", p);
 447                                 puser += sizeof(void *);
 448                         }
 449                         tprints("}, ");
 450                 }
 451                 if (tcp->u_arg[3] == 0)
 452                         tprints("NULL, ");
 453                 else {
 454                         unsigned int i;
 455                         long nodeuser = tcp->u_arg[3];
 456                         tprints("{");
 457                         for (i = 0; i < npages; ++i) {
 458                                 int node;
 459                                 if (i > 0)
 460                                         tprints(", ");
 461                                 if (umove(tcp, nodeuser, &node) < 0) {
 462                                         tprints("???");
 463                                         break;
 464                                 }
 465                                 tprintf("%#x", node);
 466                                 nodeuser += sizeof(int);
 467                         }
 468                         tprints("}, ");
 469                 }
 470         } else {
 471                 unsigned long npages = tcp->u_arg[1];
 472                 if (tcp->u_arg[4] == 0)
 473                         tprints("NULL, ");
 474                 else {
 475                         unsigned int i;
 476                         long statususer = tcp->u_arg[4];
 477                         tprints("{");
 478                         for (i = 0; i < npages; ++i) {
 479                                 int status;
 480                                 if (i > 0)
 481                                         tprints(", ");
 482                                 if (umove(tcp, statususer, &status) < 0) {
 483                                         tprints("???");
 484                                         break;
 485                                 }
 486                                 tprintf("%#x", status);
 487                                 statususer += sizeof(int);
 488                         }
 489                         tprints("}, ");
 490                 }
 491                 printflags(move_pages_flags, tcp->u_arg[5], "MPOL_???");
 492         }
 493         return 0;
 494 }
 495
 496 #if defined(POWERPC)
 497 SYS_FUNC(subpage_prot)
 498 {
 499         unsigned long cur, end, abbrev_end, entries;
 500         unsigned int entry;
 501
 502         printaddr(tcp->u_arg[0]);
 503         tprints(", ");
 504         printaddr(tcp->u_arg[1]);
 505         tprints(", ");
 506         entries = tcp->u_arg[1] >> 16;
 507         if (!entries || !tcp->u_arg[2]) {
 508                 tprints("{}");
 509                 return 0;
 510         }
 511         cur = tcp->u_arg[2];
 512         end = cur + (sizeof(int) * entries);
 513         if (!verbose(tcp) || end < (unsigned long) tcp->u_arg[2]) {
 514                 printaddr(tcp->u_arg[2]);
 515                 return 0;
 516         }
 517         if (abbrev(tcp)) {
 518                 abbrev_end = cur + (sizeof(int) * max_strlen);
 519                 if (abbrev_end > end)
 520                         abbrev_end = end;
 521         }
 522         else
 523                 abbrev_end = end;
 524         tprints("{");
 525         for (; cur < end; cur += sizeof(int)) {
 526                 if (cur > (unsigned long) tcp->u_arg[2])
 527                         tprints(", ");
 528                 if (cur >= abbrev_end) {
 529                         tprints("...");
 530                         break;
 531                 }
 532                 if (umove(tcp, cur, &entry) < 0) {
 533                         tprintf("??? [%#lx]", cur);
 534                         break;
 535                 }
 536                 else
 537                         tprintf("%#08x", entry);
 538         }
 539         tprints("}");
 540
 541         return RVAL_DECODED;
 542 }
 543 #endif