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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 static unsigned long
  38 get_pagesize()
  39 {
  40         static unsigned long pagesize;
  41
  42         if (!pagesize)
  43                 pagesize = sysconf(_SC_PAGESIZE);
  44         return pagesize;
  45 }
  46
  47 int
  48 sys_brk(struct tcb *tcp)
  49 {
  50         if (entering(tcp)) {
  51                 tprintf("%#lx", tcp->u_arg[0]);
  52         }
  53         return RVAL_HEX;
  54 }
  55
  56 #include "xlat/mmap_prot.h"
  57 #include "xlat/mmap_flags.h"
  58
  59 static int
  60 print_mmap(struct tcb *tcp, long *u_arg, unsigned long long offset)
  61 {
  62         if (entering(tcp)) {
  63                 /* addr */
  64                 if (!u_arg[0])
  65                         tprints("NULL, ");
  66                 else
  67                         tprintf("%#lx, ", u_arg[0]);
  68                 /* len */
  69                 tprintf("%lu, ", u_arg[1]);
  70                 /* prot */
  71                 printflags(mmap_prot, u_arg[2], "PROT_???");
  72                 tprints(", ");
  73                 /* flags */
  74 #ifdef MAP_TYPE
  75                 printxval(mmap_flags, u_arg[3] & MAP_TYPE, "MAP_???");
  76                 addflags(mmap_flags, u_arg[3] & ~MAP_TYPE);
  77 #else
  78                 printflags(mmap_flags, u_arg[3], "MAP_???");
  79 #endif
  80                 tprints(", ");
  81                 /* fd */
  82                 printfd(tcp, u_arg[4]);
  83                 /* offset */
  84                 tprintf(", %#llx", offset);
  85         }
  86         return RVAL_HEX;
  87 }
  88
  89 /* Syscall name<->function correspondence is messed up on many arches.
  90  * For example:
  91  * i386 has __NR_mmap == 90, and it is "old mmap", and
  92  * also it has __NR_mmap2 == 192, which is a "new mmap with page offsets".
  93  * But x86_64 has just one __NR_mmap == 9, a "new mmap with byte offsets".
  94  * Confused? Me too!
  95  */
  96
  97 /* Params are pointed to by u_arg[0], offset is in bytes */
  98 int
  99 sys_old_mmap(struct tcb *tcp)
 100 {
 101         long u_arg[6];
 102 #if defined(IA64)
 103         /*
 104          * IA64 processes never call this routine, they only use the
 105          * new 'sys_mmap' interface. Only IA32 processes come here.
 106          */
 107         int i;
 108         unsigned narrow_arg[6];
 109         if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), (char *) narrow_arg) == -1)
 110                 return 0;
 111         for (i = 0; i < 6; i++)
 112                 u_arg[i] = (unsigned long) narrow_arg[i];
 113 #elif defined(X86_64)
 114         /* We are here only in personality 1 (i386) */
 115         int i;
 116         unsigned narrow_arg[6];
 117         if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), (char *) narrow_arg) == -1)
 118                 return 0;
 119         for (i = 0; i < 6; ++i)
 120                 u_arg[i] = (unsigned long) narrow_arg[i];
 121 #else
 122         if (umoven(tcp, tcp->u_arg[0], sizeof(u_arg), (char *) u_arg) == -1)
 123                 return 0;
 124 #endif
 125         return print_mmap(tcp, u_arg, (unsigned long) u_arg[5]);
 126 }
 127
 128 #if defined(S390)
 129 /* Params are pointed to by u_arg[0], offset is in pages */
 130 int
 131 sys_old_mmap_pgoff(struct tcb *tcp)
 132 {
 133         long u_arg[5];
 134         int i;
 135         unsigned narrow_arg[6];
 136         unsigned long long offset;
 137         if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), (char *) narrow_arg) == -1)
 138                 return 0;
 139         for (i = 0; i < 5; i++)
 140                 u_arg[i] = (unsigned long) narrow_arg[i];
 141         offset = narrow_arg[5];
 142         offset *= get_pagesize();
 143         return print_mmap(tcp, u_arg, offset);
 144 }
 145 #endif
 146
 147 /* Params are passed directly, offset is in bytes */
 148 int
 149 sys_mmap(struct tcb *tcp)
 150 {
 151         unsigned long long offset = (unsigned long) tcp->u_arg[5];
 152 #if defined(LINUX_MIPSN32) || defined(X32)
 153         /* Try test/x32_mmap.c */
 154         offset = tcp->ext_arg[5];
 155 #endif
 156         /* Example of kernel-side handling of this variety of mmap:
 157          * arch/x86/kernel/sys_x86_64.c::SYSCALL_DEFINE6(mmap, ...) calls
 158          * sys_mmap_pgoff(..., off >> PAGE_SHIFT); i.e. off is in bytes,
 159          * since the above code converts off to pages.
 160          */
 161         return print_mmap(tcp, tcp->u_arg, offset);
 162 }
 163
 164 /* Params are passed directly, offset is in pages */
 165 int
 166 sys_mmap_pgoff(struct tcb *tcp)
 167 {
 168         /* Try test/mmap_offset_decode.c */
 169         unsigned long long offset;
 170         offset = (unsigned long) tcp->u_arg[5];
 171         offset *= get_pagesize();
 172         return print_mmap(tcp, tcp->u_arg, offset);
 173 }
 174
 175 /* Params are passed directly, offset is in 4k units */
 176 int
 177 sys_mmap_4koff(struct tcb *tcp)
 178 {
 179         unsigned long long offset;
 180         offset = (unsigned long) tcp->u_arg[5];
 181         offset <<= 12;
 182         return print_mmap(tcp, tcp->u_arg, offset);
 183 }
 184
 185 int
 186 sys_munmap(struct tcb *tcp)
 187 {
 188         if (entering(tcp)) {
 189                 tprintf("%#lx, %lu",
 190                         tcp->u_arg[0], tcp->u_arg[1]);
 191         }
 192         return 0;
 193 }
 194
 195 int
 196 sys_mprotect(struct tcb *tcp)
 197 {
 198         if (entering(tcp)) {
 199                 tprintf("%#lx, %lu, ",
 200                         tcp->u_arg[0], tcp->u_arg[1]);
 201                 printflags(mmap_prot, tcp->u_arg[2], "PROT_???");
 202         }
 203         return 0;
 204 }
 205
 206 #include "xlat/mremap_flags.h"
 207
 208 int
 209 sys_mremap(struct tcb *tcp)
 210 {
 211         if (entering(tcp)) {
 212                 tprintf("%#lx, %lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1],
 213                         tcp->u_arg[2]);
 214                 printflags(mremap_flags, tcp->u_arg[3], "MREMAP_???");
 215 #ifdef MREMAP_FIXED
 216                 if ((tcp->u_arg[3] & (MREMAP_MAYMOVE | MREMAP_FIXED)) ==
 217                     (MREMAP_MAYMOVE | MREMAP_FIXED))
 218                         tprintf(", %#lx", tcp->u_arg[4]);
 219 #endif
 220         }
 221         return RVAL_HEX;
 222 }
 223
 224 #include "xlat/madvise_cmds.h"
 225
 226 int
 227 sys_madvise(struct tcb *tcp)
 228 {
 229         if (entering(tcp)) {
 230                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 231                 printxval(madvise_cmds, tcp->u_arg[2], "MADV_???");
 232         }
 233         return 0;
 234 }
 235
 236 #include "xlat/mlockall_flags.h"
 237
 238 int
 239 sys_mlockall(struct tcb *tcp)
 240 {
 241         if (entering(tcp)) {
 242                 printflags(mlockall_flags, tcp->u_arg[0], "MCL_???");
 243         }
 244         return 0;
 245 }
 246
 247 #include "xlat/mctl_sync.h"
 248
 249 int
 250 sys_msync(struct tcb *tcp)
 251 {
 252         if (entering(tcp)) {
 253                 /* addr */
 254                 tprintf("%#lx", tcp->u_arg[0]);
 255                 /* len */
 256                 tprintf(", %lu, ", tcp->u_arg[1]);
 257                 /* flags */
 258                 printflags(mctl_sync, tcp->u_arg[2], "MS_???");
 259         }
 260         return 0;
 261 }
 262
 263 int
 264 sys_mincore(struct tcb *tcp)
 265 {
 266         if (entering(tcp)) {
 267                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 268         } else {
 269                 unsigned long i, len;
 270                 char *vec = NULL;
 271
 272                 len = tcp->u_arg[1];
 273                 if (syserror(tcp) || tcp->u_arg[2] == 0 ||
 274                         (vec = malloc(len)) == NULL ||
 275                         umoven(tcp, tcp->u_arg[2], len, vec) < 0)
 276                         tprintf("%#lx", tcp->u_arg[2]);
 277                 else {
 278                         tprints("[");
 279                         for (i = 0; i < len; i++) {
 280                                 if (abbrev(tcp) && i >= max_strlen) {
 281                                         tprints("...");
 282                                         break;
 283                                 }
 284                                 tprints((vec[i] & 1) ? "1" : "0");
 285                         }
 286                         tprints("]");
 287                 }
 288                 free(vec);
 289         }
 290         return 0;
 291 }
 292
 293 #if defined(ALPHA) || defined(IA64) || defined(SPARC) || defined(SPARC64)
 294 int
 295 sys_getpagesize(struct tcb *tcp)
 296 {
 297         if (exiting(tcp))
 298                 return RVAL_HEX;
 299         return 0;
 300 }
 301 #endif
 302
 303 int
 304 sys_remap_file_pages(struct tcb *tcp)
 305 {
 306         if (entering(tcp)) {
 307                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 308                 printflags(mmap_prot, tcp->u_arg[2], "PROT_???");
 309                 tprintf(", %lu, ", tcp->u_arg[3]);
 310 #ifdef MAP_TYPE
 311                 printxval(mmap_flags, tcp->u_arg[4] & MAP_TYPE, "MAP_???");
 312                 addflags(mmap_flags, tcp->u_arg[4] & ~MAP_TYPE);
 313 #else
 314                 printflags(mmap_flags, tcp->u_arg[4], "MAP_???");
 315 #endif
 316         }
 317         return 0;
 318 }
 319
 320 #define MPOL_DEFAULT    0
 321 #define MPOL_PREFERRED  1
 322 #define MPOL_BIND       2
 323 #define MPOL_INTERLEAVE 3
 324
 325 #define MPOL_F_NODE     (1<<0)
 326 #define MPOL_F_ADDR     (1<<1)
 327
 328 #define MPOL_MF_STRICT  (1<<0)
 329 #define MPOL_MF_MOVE    (1<<1)
 330 #define MPOL_MF_MOVE_ALL (1<<2)
 331
 332 #include "xlat/policies.h"
 333 #include "xlat/mbindflags.h"
 334 #include "xlat/mempolicyflags.h"
 335 #include "xlat/move_pages_flags.h"
 336
 337 static void
 338 get_nodes(struct tcb *tcp, unsigned long ptr, unsigned long maxnodes, int err)
 339 {
 340         unsigned long nlongs, size, end;
 341
 342         nlongs = (maxnodes + 8 * sizeof(long) - 1) / (8 * sizeof(long));
 343         size = nlongs * sizeof(long);
 344         end = ptr + size;
 345         if (nlongs == 0 || ((err || verbose(tcp)) && (size * 8 == maxnodes)
 346                             && (end > ptr))) {
 347                 unsigned long n, cur, abbrev_end;
 348                 int failed = 0;
 349
 350                 if (abbrev(tcp)) {
 351                         abbrev_end = ptr + max_strlen * sizeof(long);
 352                         if (abbrev_end < ptr)
 353                                 abbrev_end = end;
 354                 } else {
 355                         abbrev_end = end;
 356                 }
 357                 tprints(", {");
 358                 for (cur = ptr; cur < end; cur += sizeof(long)) {
 359                         if (cur > ptr)
 360                                 tprints(", ");
 361                         if (cur >= abbrev_end) {
 362                                 tprints("...");
 363                                 break;
 364                         }
 365                         if (umoven(tcp, cur, sizeof(n), (char *) &n) < 0) {
 366                                 tprints("?");
 367                                 failed = 1;
 368                                 break;
 369                         }
 370                         tprintf("%#0*lx", (int) sizeof(long) * 2 + 2, n);
 371                 }
 372                 tprints("}");
 373                 if (failed)
 374                         tprintf(" %#lx", ptr);
 375         } else
 376                 tprintf(", %#lx", ptr);
 377         tprintf(", %lu", maxnodes);
 378 }
 379
 380 int
 381 sys_mbind(struct tcb *tcp)
 382 {
 383         if (entering(tcp)) {
 384                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 385                 printxval(policies, tcp->u_arg[2], "MPOL_???");
 386                 get_nodes(tcp, tcp->u_arg[3], tcp->u_arg[4], 0);
 387                 tprints(", ");
 388                 printflags(mbindflags, tcp->u_arg[5], "MPOL_???");
 389         }
 390         return 0;
 391 }
 392
 393 int
 394 sys_set_mempolicy(struct tcb *tcp)
 395 {
 396         if (entering(tcp)) {
 397                 printxval(policies, tcp->u_arg[0], "MPOL_???");
 398                 get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], 0);
 399         }
 400         return 0;
 401 }
 402
 403 int
 404 sys_get_mempolicy(struct tcb *tcp)
 405 {
 406         if (exiting(tcp)) {
 407                 int pol;
 408                 if (tcp->u_arg[0] == 0)
 409                         tprints("NULL");
 410                 else if (syserror(tcp) || umove(tcp, tcp->u_arg[0], &pol) < 0)
 411                         tprintf("%#lx", tcp->u_arg[0]);
 412                 else
 413                         printxval(policies, pol, "MPOL_???");
 414                 get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], syserror(tcp));
 415                 tprintf(", %#lx, ", tcp->u_arg[3]);
 416                 printflags(mempolicyflags, tcp->u_arg[4], "MPOL_???");
 417         }
 418         return 0;
 419 }
 420
 421 int
 422 sys_migrate_pages(struct tcb *tcp)
 423 {
 424         if (entering(tcp)) {
 425                 tprintf("%ld, ", (long) (pid_t) tcp->u_arg[0]);
 426                 get_nodes(tcp, tcp->u_arg[2], tcp->u_arg[1], 0);
 427                 tprints(", ");
 428                 get_nodes(tcp, tcp->u_arg[3], tcp->u_arg[1], 0);
 429         }
 430         return 0;
 431 }
 432
 433 int
 434 sys_move_pages(struct tcb *tcp)
 435 {
 436         if (entering(tcp)) {
 437                 unsigned long npages = tcp->u_arg[1];
 438                 tprintf("%ld, %lu, ", tcp->u_arg[0], npages);
 439                 if (tcp->u_arg[2] == 0)
 440                         tprints("NULL, ");
 441                 else {
 442                         unsigned int i;
 443                         long puser = tcp->u_arg[2];
 444                         tprints("{");
 445                         for (i = 0; i < npages; ++i) {
 446                                 void *p;
 447                                 if (i > 0)
 448                                         tprints(", ");
 449                                 if (umove(tcp, puser, &p) < 0) {
 450                                         tprints("???");
 451                                         break;
 452                                 }
 453                                 tprintf("%p", p);
 454                                 puser += sizeof(void *);
 455                         }
 456                         tprints("}, ");
 457                 }
 458                 if (tcp->u_arg[3] == 0)
 459                         tprints("NULL, ");
 460                 else {
 461                         unsigned int i;
 462                         long nodeuser = tcp->u_arg[3];
 463                         tprints("{");
 464                         for (i = 0; i < npages; ++i) {
 465                                 int node;
 466                                 if (i > 0)
 467                                         tprints(", ");
 468                                 if (umove(tcp, nodeuser, &node) < 0) {
 469                                         tprints("???");
 470                                         break;
 471                                 }
 472                                 tprintf("%#x", node);
 473                                 nodeuser += sizeof(int);
 474                         }
 475                         tprints("}, ");
 476                 }
 477         }
 478         if (exiting(tcp)) {
 479                 unsigned long npages = tcp->u_arg[1];
 480                 if (tcp->u_arg[4] == 0)
 481                         tprints("NULL, ");
 482                 else {
 483                         unsigned int i;
 484                         long statususer = tcp->u_arg[4];
 485                         tprints("{");
 486                         for (i = 0; i < npages; ++i) {
 487                                 int status;
 488                                 if (i > 0)
 489                                         tprints(", ");
 490                                 if (umove(tcp, statususer, &status) < 0) {
 491                                         tprints("???");
 492                                         break;
 493                                 }
 494                                 tprintf("%#x", status);
 495                                 statususer += sizeof(int);
 496                         }
 497                         tprints("}, ");
 498                 }
 499                 printflags(move_pages_flags, tcp->u_arg[5], "MPOL_???");
 500         }
 501         return 0;
 502 }
 503
 504 #if defined(POWERPC)
 505 int
 506 sys_subpage_prot(struct tcb *tcp)
 507 {
 508         if (entering(tcp)) {
 509                 unsigned long cur, end, abbrev_end, entries;
 510                 unsigned int entry;
 511
 512                 tprintf("%#lx, %#lx, ", tcp->u_arg[0], tcp->u_arg[1]);
 513                 entries = tcp->u_arg[1] >> 16;
 514                 if (!entries || !tcp->u_arg[2]) {
 515                         tprints("{}");
 516                         return 0;
 517                 }
 518                 cur = tcp->u_arg[2];
 519                 end = cur + (sizeof(int) * entries);
 520                 if (!verbose(tcp) || end < (unsigned long) tcp->u_arg[2]) {
 521                         tprintf("%#lx", tcp->u_arg[2]);
 522                         return 0;
 523                 }
 524                 if (abbrev(tcp)) {
 525                         abbrev_end = cur + (sizeof(int) * max_strlen);
 526                         if (abbrev_end > end)
 527                                 abbrev_end = end;
 528                 }
 529                 else
 530                         abbrev_end = end;
 531                 tprints("{");
 532                 for (; cur < end; cur += sizeof(int)) {
 533                         if (cur > (unsigned long) tcp->u_arg[2])
 534                                 tprints(", ");
 535                         if (cur >= abbrev_end) {
 536                                 tprints("...");
 537                                 break;
 538                         }
 539                         if (umove(tcp, cur, &entry) < 0) {
 540                                 tprintf("??? [%#lx]", cur);
 541                                 break;
 542                         }
 543                         else
 544                                 tprintf("%#08x", entry);
 545                 }
 546                 tprints("}");
 547         }
 548
 549         return 0;
 550 }
 551 #endif