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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         if (entering(tcp)) {
  50                 tprintf("%#lx", tcp->u_arg[0]);
  51         }
  52         return RVAL_HEX;
  53 }
  54
  55 #include "xlat/mmap_prot.h"
  56 #include "xlat/mmap_flags.h"
  57
  58 static int
  59 print_mmap(struct tcb *tcp, long *u_arg, unsigned long long offset)
  60 {
  61         if (entering(tcp)) {
  62                 /* addr */
  63                 if (!u_arg[0])
  64                         tprints("NULL, ");
  65                 else
  66                         tprintf("%#lx, ", u_arg[0]);
  67                 /* len */
  68                 tprintf("%lu, ", u_arg[1]);
  69                 /* prot */
  70                 printflags(mmap_prot, u_arg[2], "PROT_???");
  71                 tprints(", ");
  72                 /* flags */
  73 #ifdef MAP_TYPE
  74                 printxval(mmap_flags, u_arg[3] & MAP_TYPE, "MAP_???");
  75                 addflags(mmap_flags, u_arg[3] & ~MAP_TYPE);
  76 #else
  77                 printflags(mmap_flags, u_arg[3], "MAP_???");
  78 #endif
  79                 tprints(", ");
  80                 /* fd */
  81                 printfd(tcp, u_arg[4]);
  82                 /* offset */
  83                 tprintf(", %#llx", offset);
  84         }
  85         return RVAL_HEX;
  86 }
  87
  88 /* Syscall name<->function correspondence is messed up on many arches.
  89  * For example:
  90  * i386 has __NR_mmap == 90, and it is "old mmap", and
  91  * also it has __NR_mmap2 == 192, which is a "new mmap with page offsets".
  92  * But x86_64 has just one __NR_mmap == 9, a "new mmap with byte offsets".
  93  * Confused? Me too!
  94  */
  95
  96 /* Params are pointed to by u_arg[0], offset is in bytes */
  97 SYS_FUNC(old_mmap)
  98 {
  99         long u_arg[6];
 100 #if defined(IA64)
 101         /*
 102          * IA64 processes never call this routine, they only use the
 103          * new 'sys_mmap' interface. Only IA32 processes come here.
 104          */
 105         int i;
 106         unsigned narrow_arg[6];
 107         if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), narrow_arg) == -1)
 108                 return 0;
 109         for (i = 0; i < 6; i++)
 110                 u_arg[i] = (unsigned long) narrow_arg[i];
 111 #elif defined(X86_64)
 112         /* We are here only in personality 1 (i386) */
 113         int i;
 114         unsigned narrow_arg[6];
 115         if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), narrow_arg) == -1)
 116                 return 0;
 117         for (i = 0; i < 6; ++i)
 118                 u_arg[i] = (unsigned long) narrow_arg[i];
 119 #else
 120         if (umoven(tcp, tcp->u_arg[0], sizeof(u_arg), u_arg) == -1)
 121                 return 0;
 122 #endif
 123         return print_mmap(tcp, u_arg, (unsigned long) u_arg[5]);
 124 }
 125
 126 #if defined(S390)
 127 /* Params are pointed to by u_arg[0], offset is in pages */
 128 SYS_FUNC(old_mmap_pgoff)
 129 {
 130         long u_arg[5];
 131         int i;
 132         unsigned narrow_arg[6];
 133         unsigned long long offset;
 134         if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), narrow_arg) == -1)
 135                 return 0;
 136         for (i = 0; i < 5; i++)
 137                 u_arg[i] = (unsigned long) narrow_arg[i];
 138         offset = narrow_arg[5];
 139         offset *= get_pagesize();
 140         return print_mmap(tcp, u_arg, offset);
 141 }
 142 #endif
 143
 144 /* Params are passed directly, offset is in bytes */
 145 SYS_FUNC(mmap)
 146 {
 147         unsigned long long offset = (unsigned long) tcp->u_arg[5];
 148 #if defined(LINUX_MIPSN32) || defined(X32)
 149         /* Try test/x32_mmap.c */
 150         offset = tcp->ext_arg[5];
 151 #endif
 152         /* Example of kernel-side handling of this variety of mmap:
 153          * arch/x86/kernel/sys_x86_64.c::SYSCALL_DEFINE6(mmap, ...) calls
 154          * sys_mmap_pgoff(..., off >> PAGE_SHIFT); i.e. off is in bytes,
 155          * since the above code converts off to pages.
 156          */
 157         return print_mmap(tcp, tcp->u_arg, offset);
 158 }
 159
 160 /* Params are passed directly, offset is in pages */
 161 SYS_FUNC(mmap_pgoff)
 162 {
 163         /* Try test/mmap_offset_decode.c */
 164         unsigned long long offset;
 165         offset = (unsigned long) tcp->u_arg[5];
 166         offset *= get_pagesize();
 167         return print_mmap(tcp, tcp->u_arg, offset);
 168 }
 169
 170 /* Params are passed directly, offset is in 4k units */
 171 SYS_FUNC(mmap_4koff)
 172 {
 173         unsigned long long offset;
 174         offset = (unsigned long) tcp->u_arg[5];
 175         offset <<= 12;
 176         return print_mmap(tcp, tcp->u_arg, offset);
 177 }
 178
 179 SYS_FUNC(munmap)
 180 {
 181         if (entering(tcp)) {
 182                 tprintf("%#lx, %lu",
 183                         tcp->u_arg[0], tcp->u_arg[1]);
 184         }
 185         return 0;
 186 }
 187
 188 SYS_FUNC(mprotect)
 189 {
 190         if (entering(tcp)) {
 191                 tprintf("%#lx, %lu, ",
 192                         tcp->u_arg[0], tcp->u_arg[1]);
 193                 printflags(mmap_prot, tcp->u_arg[2], "PROT_???");
 194         }
 195         return 0;
 196 }
 197
 198 #include "xlat/mremap_flags.h"
 199
 200 SYS_FUNC(mremap)
 201 {
 202         if (entering(tcp)) {
 203                 tprintf("%#lx, %lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1],
 204                         tcp->u_arg[2]);
 205                 printflags(mremap_flags, tcp->u_arg[3], "MREMAP_???");
 206 #ifdef MREMAP_FIXED
 207                 if ((tcp->u_arg[3] & (MREMAP_MAYMOVE | MREMAP_FIXED)) ==
 208                     (MREMAP_MAYMOVE | MREMAP_FIXED))
 209                         tprintf(", %#lx", tcp->u_arg[4]);
 210 #endif
 211         }
 212         return RVAL_HEX;
 213 }
 214
 215 #include "xlat/madvise_cmds.h"
 216
 217 SYS_FUNC(madvise)
 218 {
 219         if (entering(tcp)) {
 220                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 221                 printxval(madvise_cmds, tcp->u_arg[2], "MADV_???");
 222         }
 223         return 0;
 224 }
 225
 226 #include "xlat/mlockall_flags.h"
 227
 228 SYS_FUNC(mlockall)
 229 {
 230         if (entering(tcp)) {
 231                 printflags(mlockall_flags, tcp->u_arg[0], "MCL_???");
 232         }
 233         return 0;
 234 }
 235
 236 #include "xlat/mctl_sync.h"
 237
 238 SYS_FUNC(msync)
 239 {
 240         if (entering(tcp)) {
 241                 /* addr */
 242                 tprintf("%#lx", tcp->u_arg[0]);
 243                 /* len */
 244                 tprintf(", %lu, ", tcp->u_arg[1]);
 245                 /* flags */
 246                 printflags(mctl_sync, tcp->u_arg[2], "MS_???");
 247         }
 248         return 0;
 249 }
 250
 251 SYS_FUNC(mincore)
 252 {
 253         if (entering(tcp)) {
 254                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 255         } else {
 256                 unsigned long i, len;
 257                 char *vec = NULL;
 258
 259                 len = tcp->u_arg[1];
 260                 if (syserror(tcp) || tcp->u_arg[2] == 0 ||
 261                         (vec = malloc(len)) == NULL ||
 262                         umoven(tcp, tcp->u_arg[2], len, vec) < 0)
 263                         tprintf("%#lx", tcp->u_arg[2]);
 264                 else {
 265                         tprints("[");
 266                         for (i = 0; i < len; i++) {
 267                                 if (abbrev(tcp) && i >= max_strlen) {
 268                                         tprints("...");
 269                                         break;
 270                                 }
 271                                 tprints((vec[i] & 1) ? "1" : "0");
 272                         }
 273                         tprints("]");
 274                 }
 275                 free(vec);
 276         }
 277         return 0;
 278 }
 279
 280 #if defined(ALPHA) || defined(IA64) || defined(SPARC) || defined(SPARC64)
 281 SYS_FUNC(getpagesize)
 282 {
 283         if (exiting(tcp))
 284                 return RVAL_HEX;
 285         return 0;
 286 }
 287 #endif
 288
 289 SYS_FUNC(remap_file_pages)
 290 {
 291         if (entering(tcp)) {
 292                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 293                 printflags(mmap_prot, tcp->u_arg[2], "PROT_???");
 294                 tprintf(", %lu, ", tcp->u_arg[3]);
 295 #ifdef MAP_TYPE
 296                 printxval(mmap_flags, tcp->u_arg[4] & MAP_TYPE, "MAP_???");
 297                 addflags(mmap_flags, tcp->u_arg[4] & ~MAP_TYPE);
 298 #else
 299                 printflags(mmap_flags, tcp->u_arg[4], "MAP_???");
 300 #endif
 301         }
 302         return 0;
 303 }
 304
 305 #define MPOL_DEFAULT    0
 306 #define MPOL_PREFERRED  1
 307 #define MPOL_BIND       2
 308 #define MPOL_INTERLEAVE 3
 309
 310 #define MPOL_F_NODE     (1<<0)
 311 #define MPOL_F_ADDR     (1<<1)
 312
 313 #define MPOL_MF_STRICT  (1<<0)
 314 #define MPOL_MF_MOVE    (1<<1)
 315 #define MPOL_MF_MOVE_ALL (1<<2)
 316
 317 #include "xlat/policies.h"
 318 #include "xlat/mbindflags.h"
 319 #include "xlat/mempolicyflags.h"
 320 #include "xlat/move_pages_flags.h"
 321
 322 static void
 323 get_nodes(struct tcb *tcp, unsigned long ptr, unsigned long maxnodes, int err)
 324 {
 325         unsigned long nlongs, size, end;
 326
 327         nlongs = (maxnodes + 8 * sizeof(long) - 1) / (8 * sizeof(long));
 328         size = nlongs * sizeof(long);
 329         end = ptr + size;
 330         if (nlongs == 0 || ((err || verbose(tcp)) && (size * 8 == maxnodes)
 331                             && (end > ptr))) {
 332                 unsigned long n, cur, abbrev_end;
 333                 int failed = 0;
 334
 335                 if (abbrev(tcp)) {
 336                         abbrev_end = ptr + max_strlen * sizeof(long);
 337                         if (abbrev_end < ptr)
 338                                 abbrev_end = end;
 339                 } else {
 340                         abbrev_end = end;
 341                 }
 342                 tprints(", {");
 343                 for (cur = ptr; cur < end; cur += sizeof(long)) {
 344                         if (cur > ptr)
 345                                 tprints(", ");
 346                         if (cur >= abbrev_end) {
 347                                 tprints("...");
 348                                 break;
 349                         }
 350                         if (umoven(tcp, cur, sizeof(n), &n) < 0) {
 351                                 tprints("?");
 352                                 failed = 1;
 353                                 break;
 354                         }
 355                         tprintf("%#0*lx", (int) sizeof(long) * 2 + 2, n);
 356                 }
 357                 tprints("}");
 358                 if (failed)
 359                         tprintf(" %#lx", ptr);
 360         } else
 361                 tprintf(", %#lx", ptr);
 362         tprintf(", %lu", maxnodes);
 363 }
 364
 365 SYS_FUNC(mbind)
 366 {
 367         if (entering(tcp)) {
 368                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 369                 printxval(policies, tcp->u_arg[2], "MPOL_???");
 370                 get_nodes(tcp, tcp->u_arg[3], tcp->u_arg[4], 0);
 371                 tprints(", ");
 372                 printflags(mbindflags, tcp->u_arg[5], "MPOL_???");
 373         }
 374         return 0;
 375 }
 376
 377 SYS_FUNC(set_mempolicy)
 378 {
 379         if (entering(tcp)) {
 380                 printxval(policies, tcp->u_arg[0], "MPOL_???");
 381                 get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], 0);
 382         }
 383         return 0;
 384 }
 385
 386 SYS_FUNC(get_mempolicy)
 387 {
 388         if (exiting(tcp)) {
 389                 int pol;
 390                 if (tcp->u_arg[0] == 0)
 391                         tprints("NULL");
 392                 else if (syserror(tcp) || umove(tcp, tcp->u_arg[0], &pol) < 0)
 393                         tprintf("%#lx", tcp->u_arg[0]);
 394                 else
 395                         printxval(policies, pol, "MPOL_???");
 396                 get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], syserror(tcp));
 397                 tprintf(", %#lx, ", tcp->u_arg[3]);
 398                 printflags(mempolicyflags, tcp->u_arg[4], "MPOL_???");
 399         }
 400         return 0;
 401 }
 402
 403 SYS_FUNC(migrate_pages)
 404 {
 405         if (entering(tcp)) {
 406                 tprintf("%ld, ", (long) (pid_t) tcp->u_arg[0]);
 407                 get_nodes(tcp, tcp->u_arg[2], tcp->u_arg[1], 0);
 408                 tprints(", ");
 409                 get_nodes(tcp, tcp->u_arg[3], tcp->u_arg[1], 0);
 410         }
 411         return 0;
 412 }
 413
 414 SYS_FUNC(move_pages)
 415 {
 416         if (entering(tcp)) {
 417                 unsigned long npages = tcp->u_arg[1];
 418                 tprintf("%ld, %lu, ", tcp->u_arg[0], npages);
 419                 if (tcp->u_arg[2] == 0)
 420                         tprints("NULL, ");
 421                 else {
 422                         unsigned int i;
 423                         long puser = tcp->u_arg[2];
 424                         tprints("{");
 425                         for (i = 0; i < npages; ++i) {
 426                                 void *p;
 427                                 if (i > 0)
 428                                         tprints(", ");
 429                                 if (umove(tcp, puser, &p) < 0) {
 430                                         tprints("???");
 431                                         break;
 432                                 }
 433                                 tprintf("%p", p);
 434                                 puser += sizeof(void *);
 435                         }
 436                         tprints("}, ");
 437                 }
 438                 if (tcp->u_arg[3] == 0)
 439                         tprints("NULL, ");
 440                 else {
 441                         unsigned int i;
 442                         long nodeuser = tcp->u_arg[3];
 443                         tprints("{");
 444                         for (i = 0; i < npages; ++i) {
 445                                 int node;
 446                                 if (i > 0)
 447                                         tprints(", ");
 448                                 if (umove(tcp, nodeuser, &node) < 0) {
 449                                         tprints("???");
 450                                         break;
 451                                 }
 452                                 tprintf("%#x", node);
 453                                 nodeuser += sizeof(int);
 454                         }
 455                         tprints("}, ");
 456                 }
 457         }
 458         if (exiting(tcp)) {
 459                 unsigned long npages = tcp->u_arg[1];
 460                 if (tcp->u_arg[4] == 0)
 461                         tprints("NULL, ");
 462                 else {
 463                         unsigned int i;
 464                         long statususer = tcp->u_arg[4];
 465                         tprints("{");
 466                         for (i = 0; i < npages; ++i) {
 467                                 int status;
 468                                 if (i > 0)
 469                                         tprints(", ");
 470                                 if (umove(tcp, statususer, &status) < 0) {
 471                                         tprints("???");
 472                                         break;
 473                                 }
 474                                 tprintf("%#x", status);
 475                                 statususer += sizeof(int);
 476                         }
 477                         tprints("}, ");
 478                 }
 479                 printflags(move_pages_flags, tcp->u_arg[5], "MPOL_???");
 480         }
 481         return 0;
 482 }
 483
 484 #if defined(POWERPC)
 485 SYS_FUNC(subpage_prot)
 486 {
 487         if (entering(tcp)) {
 488                 unsigned long cur, end, abbrev_end, entries;
 489                 unsigned int entry;
 490
 491                 tprintf("%#lx, %#lx, ", tcp->u_arg[0], tcp->u_arg[1]);
 492                 entries = tcp->u_arg[1] >> 16;
 493                 if (!entries || !tcp->u_arg[2]) {
 494                         tprints("{}");
 495                         return 0;
 496                 }
 497                 cur = tcp->u_arg[2];
 498                 end = cur + (sizeof(int) * entries);
 499                 if (!verbose(tcp) || end < (unsigned long) tcp->u_arg[2]) {
 500                         tprintf("%#lx", tcp->u_arg[2]);
 501                         return 0;
 502                 }
 503                 if (abbrev(tcp)) {
 504                         abbrev_end = cur + (sizeof(int) * max_strlen);
 505                         if (abbrev_end > end)
 506                                 abbrev_end = end;
 507                 }
 508                 else
 509                         abbrev_end = end;
 510                 tprints("{");
 511                 for (; cur < end; cur += sizeof(int)) {
 512                         if (cur > (unsigned long) tcp->u_arg[2])
 513                                 tprints(", ");
 514                         if (cur >= abbrev_end) {
 515                                 tprints("...");
 516                                 break;
 517                         }
 518                         if (umove(tcp, cur, &entry) < 0) {
 519                                 tprintf("??? [%#lx]", cur);
 520                                 break;
 521                         }
 522                         else
 523                                 tprintf("%#08x", entry);
 524                 }
 525                 tprints("}");
 526         }
 527
 528         return 0;
 529 }
 530 #endif