libexec/rtld-elf/mips/reloc.c

   1 /*      $NetBSD: mips_reloc.c,v 1.58 2010/01/14 11:57:06 skrll Exp $    */
   2
   3 /*
   4  * Copyright 1997 Michael L. Hitch <mhitch@montana.edu>
   5  * Portions copyright 2002 Charles M. Hannum <root@ihack.net>
   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
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <sys/endian.h>
  37
  38 #include <stdlib.h>
  39 #include <string.h>
  40 #include <inttypes.h>
  41
  42 #include <machine/sysarch.h>
  43 #include <machine/tls.h>
  44
  45 #include "debug.h"
  46 #include "rtld.h"
  47
  48 #ifdef __mips_n64
  49 #define GOT1_MASK       0x8000000000000000UL
  50 #else
  51 #define GOT1_MASK       0x80000000UL
  52 #endif
  53
  54 void
  55 init_pltgot(Obj_Entry *obj)
  56 {
  57         if (obj->pltgot != NULL) {
  58                 obj->pltgot[0] = (Elf_Addr) &_rtld_bind_start;
  59                 if (obj->pltgot[1] & 0x80000000)
  60                         obj->pltgot[1] = (Elf_Addr) obj | GOT1_MASK;
  61         }
  62 }
  63
  64 int
  65 do_copy_relocations(Obj_Entry *dstobj)
  66 {
  67         /* Do nothing */
  68         return 0;
  69 }
  70
  71 void _rtld_relocate_nonplt_self(Elf_Dyn *, Elf_Addr);
  72
  73 /*
  74  * It is possible for the compiler to emit relocations for unaligned data.
  75  * We handle this situation with these inlines.
  76  */
  77 #ifdef __mips_n64
  78 /*
  79  * ELF64 MIPS encodes the relocs uniquely.  The first 32-bits of info contain
  80  * the symbol index.  The top 32-bits contain three relocation types encoded
  81  * in big-endian integer with first relocation in LSB.  This means for little
  82  * endian we have to byte swap that integer (r_type).
  83  */
  84 #define Elf_Sxword                      Elf64_Sxword
  85 #define ELF_R_NXTTYPE_64_P(r_type)      ((((r_type) >> 8) & 0xff) == R_TYPE(64))
  86 #if BYTE_ORDER == LITTLE_ENDIAN
  87 #undef ELF_R_SYM
  88 #undef ELF_R_TYPE
  89 #define ELF_R_SYM(r_info)               ((r_info) & 0xffffffff)
  90 #define ELF_R_TYPE(r_info)              bswap32((r_info) >> 32)
  91 #endif
  92 #else
  93 #define ELF_R_NXTTYPE_64_P(r_type)      (0)
  94 #define Elf_Sxword                      Elf32_Sword
  95 #endif
  96
  97 static __inline Elf_Sxword
  98 load_ptr(void *where, size_t len)
  99 {
 100         Elf_Sxword val;
 101
 102         if (__predict_true(((uintptr_t)where & (len - 1)) == 0)) {
 103 #ifdef __mips_n64
 104                 if (len == sizeof(Elf_Sxword))
 105                         return *(Elf_Sxword *)where;
 106 #endif
 107                 return *(Elf_Sword *)where;
 108         }
 109
 110         val = 0;
 111 #if BYTE_ORDER == LITTLE_ENDIAN
 112         (void)memcpy(&val, where, len);
 113 #endif
 114 #if BYTE_ORDER == BIG_ENDIAN
 115         (void)memcpy((uint8_t *)((&val)+1) - len, where, len);
 116 #endif
 117         return (len == sizeof(Elf_Sxword)) ? val : (Elf_Sword)val;
 118 }
 119
 120 static __inline void
 121 store_ptr(void *where, Elf_Sxword val, size_t len)
 122 {
 123         if (__predict_true(((uintptr_t)where & (len - 1)) == 0)) {
 124 #ifdef __mips_n64
 125                 if (len == sizeof(Elf_Sxword)) {
 126                         *(Elf_Sxword *)where = val;
 127                         return;
 128                 }
 129 #endif
 130                 *(Elf_Sword *)where = val;
 131                 return;
 132         }
 133 #if BYTE_ORDER == LITTLE_ENDIAN
 134         (void)memcpy(where, &val, len);
 135 #endif
 136 #if BYTE_ORDER == BIG_ENDIAN
 137         (void)memcpy(where, (const uint8_t *)((&val)+1) - len, len);
 138 #endif
 139 }
 140
 141 void
 142 _rtld_relocate_nonplt_self(Elf_Dyn *dynp, Elf_Addr relocbase)
 143 {
 144         const Elf_Rel *rel = 0, *rellim;
 145         Elf_Addr relsz = 0;
 146         const Elf_Sym *symtab = NULL, *sym;
 147         Elf_Addr *where;
 148         Elf_Addr *got = NULL;
 149         Elf_Word local_gotno = 0, symtabno = 0, gotsym = 0;
 150         size_t i;
 151
 152         for (; dynp->d_tag != DT_NULL; dynp++) {
 153                 switch (dynp->d_tag) {
 154                 case DT_REL:
 155                         rel = (const Elf_Rel *)(relocbase + dynp->d_un.d_ptr);
 156                         break;
 157                 case DT_RELSZ:
 158                         relsz = dynp->d_un.d_val;
 159                         break;
 160                 case DT_SYMTAB:
 161                         symtab = (const Elf_Sym *)(relocbase + dynp->d_un.d_ptr);
 162                         break;
 163                 case DT_PLTGOT:
 164                         got = (Elf_Addr *)(relocbase + dynp->d_un.d_ptr);
 165                         break;
 166                 case DT_MIPS_LOCAL_GOTNO:
 167                         local_gotno = dynp->d_un.d_val;
 168                         break;
 169                 case DT_MIPS_SYMTABNO:
 170                         symtabno = dynp->d_un.d_val;
 171                         break;
 172                 case DT_MIPS_GOTSYM:
 173                         gotsym = dynp->d_un.d_val;
 174                         break;
 175                 }
 176         }
 177
 178         i = (got[1] & GOT1_MASK) ? 2 : 1;
 179         /* Relocate the local GOT entries */
 180         got += i;
 181         for (; i < local_gotno; i++) {
 182                 *got++ += relocbase;
 183         }
 184
 185         sym = symtab + gotsym;
 186         /* Now do the global GOT entries */
 187         for (i = gotsym; i < symtabno; i++) {
 188                 *got = sym->st_value + relocbase;
 189                 ++sym;
 190                 ++got;
 191         }
 192
 193         rellim = (const Elf_Rel *)((caddr_t)rel + relsz);
 194         for (; rel < rellim; rel++) {
 195                 Elf_Word r_symndx, r_type;
 196
 197                 where = (void *)(relocbase + rel->r_offset);
 198
 199                 r_symndx = ELF_R_SYM(rel->r_info);
 200                 r_type = ELF_R_TYPE(rel->r_info);
 201
 202                 switch (r_type & 0xff) {
 203                 case R_TYPE(REL32): {
 204                         const size_t rlen =
 205                             ELF_R_NXTTYPE_64_P(r_type)
 206                                 ? sizeof(Elf_Sxword)
 207                                 : sizeof(Elf_Sword);
 208                         Elf_Sxword old = load_ptr(where, rlen);
 209                         Elf_Sxword val = old;
 210 #ifdef __mips_n64
 211                         assert(r_type == R_TYPE(REL32)
 212                             || r_type == (R_TYPE(REL32)|(R_TYPE(64) << 8)));
 213 #endif
 214                         assert(r_symndx < gotsym);
 215                         sym = symtab + r_symndx;
 216                         assert(ELF_ST_BIND(sym->st_info) == STB_LOCAL);
 217                         val += relocbase;
 218                         store_ptr(where, val, sizeof(Elf_Sword));
 219                         dbg("REL32/L(%p) %p -> %p in <self>",
 220                             where, (void *)old, (void *)val);
 221                         store_ptr(where, val, rlen);
 222                         break;
 223                 }
 224
 225                 case R_TYPE(GPREL32):
 226                 case R_TYPE(NONE):
 227                         break;
 228
 229
 230                 default:
 231                         abort();
 232                         break;
 233                 }
 234         }
 235 }
 236
 237 Elf_Addr
 238 _mips_rtld_bind(Obj_Entry *obj, Elf_Size reloff)
 239 {
 240         Elf_Addr *got = obj->pltgot;
 241         const Elf_Sym *def;
 242         const Obj_Entry *defobj;
 243         Elf_Addr target;
 244
 245         def = find_symdef(reloff, obj, &defobj, SYMLOOK_IN_PLT, NULL,
 246             NULL);
 247         if (def == NULL)
 248                 _rtld_error("bind failed no symbol");
 249
 250         target = (Elf_Addr)(defobj->relocbase + def->st_value);
 251         dbg("bind now/fixup at %s sym # %jd in %s --> was=%p new=%p",
 252             obj->path,
 253             (intmax_t)reloff, defobj->strtab + def->st_name,
 254             (void *)got[obj->local_gotno + reloff - obj->gotsym],
 255             (void *)target);
 256         got[obj->local_gotno + reloff - obj->gotsym] = target;
 257         return (Elf_Addr)target;
 258 }
 259
 260 int
 261 reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld, int flags,
 262     RtldLockState *lockstate)
 263 {
 264         const Elf_Rel *rel;
 265         const Elf_Rel *rellim;
 266         Elf_Addr *got = obj->pltgot;
 267         const Elf_Sym *sym, *def;
 268         const Obj_Entry *defobj;
 269         Elf_Word i;
 270 #ifdef SUPPORT_OLD_BROKEN_LD
 271         int broken;
 272 #endif
 273
 274         /* The relocation for the dynamic loader has already been done. */
 275         if (obj == obj_rtld)
 276                 return (0);
 277
 278 #ifdef SUPPORT_OLD_BROKEN_LD
 279         broken = 0;
 280         sym = obj->symtab;
 281         for (i = 1; i < 12; i++)
 282                 if (sym[i].st_info == ELF_ST_INFO(STB_LOCAL, STT_NOTYPE))
 283                         broken = 1;
 284         dbg("%s: broken=%d", obj->path, broken);
 285 #endif
 286
 287         i = (got[1] & GOT1_MASK) ? 2 : 1;
 288
 289         /* Relocate the local GOT entries */
 290         got += i;
 291         dbg("got:%p for %d entries adding %p",
 292             got, obj->local_gotno, obj->relocbase);
 293         for (; i < obj->local_gotno; i++) {
 294                 *got += (Elf_Addr)obj->relocbase;
 295                 got++;
 296         }
 297         sym = obj->symtab + obj->gotsym;
 298
 299         dbg("got:%p for %d entries",
 300             got, obj->symtabno);
 301         /* Now do the global GOT entries */
 302         for (i = obj->gotsym; i < obj->symtabno; i++) {
 303                 dbg(" doing got %d sym %p (%s, %lx)", i - obj->gotsym, sym,
 304                     sym->st_name + obj->strtab, (u_long) *got);
 305
 306 #ifdef SUPPORT_OLD_BROKEN_LD
 307                 if (ELF_ST_TYPE(sym->st_info) == STT_FUNC &&
 308                     broken && sym->st_shndx == SHN_UNDEF) {
 309                         /*
 310                          * XXX DANGER WILL ROBINSON!
 311                          * You might think this is stupid, as it intentionally
 312                          * defeats lazy binding -- and you'd be right.
 313                          * Unfortunately, for lazy binding to work right, we
 314                          * need to a way to force the GOT slots used for
 315                          * function pointers to be resolved immediately.  This
 316                          * is supposed to be done automatically by the linker,
 317                          * by not outputting a PLT slot and setting st_value
 318                          * to 0 if there are non-PLT references, but older
 319                          * versions of GNU ld do not do this.
 320                          */
 321                         def = find_symdef(i, obj, &defobj, flags, NULL,
 322                             lockstate);
 323                         if (def == NULL)
 324                                 return -1;
 325                         *got = def->st_value + (Elf_Addr)defobj->relocbase;
 326                 } else
 327 #endif
 328                 if (ELF_ST_TYPE(sym->st_info) == STT_FUNC &&
 329                     sym->st_value != 0 && sym->st_shndx == SHN_UNDEF) {
 330                         /*
 331                          * If there are non-PLT references to the function,
 332                          * st_value should be 0, forcing us to resolve the
 333                          * address immediately.
 334                          *
 335                          * XXX DANGER WILL ROBINSON!
 336                          * The linker is not outputting PLT slots for calls to
 337                          * functions that are defined in the same shared
 338                          * library.  This is a bug, because it can screw up
 339                          * link ordering rules if the symbol is defined in
 340                          * more than one module.  For now, if there is a
 341                          * definition, we fail the test above and force a full
 342                          * symbol lookup.  This means that all intra-module
 343                          * calls are bound immediately.  - mycroft, 2003/09/24
 344                          */
 345                         *got = sym->st_value + (Elf_Addr)obj->relocbase;
 346                         if ((Elf_Addr)(*got) == (Elf_Addr)obj->relocbase) {
 347                                 dbg("Warning2, i:%d maps to relocbase address:%p",
 348                                     i, obj->relocbase);
 349                         }
 350
 351                 } else if (sym->st_info == ELF_ST_INFO(STB_GLOBAL, STT_SECTION)) {
 352                         /* Symbols with index SHN_ABS are not relocated. */
 353                         if (sym->st_shndx != SHN_ABS) {
 354                                 *got = sym->st_value +
 355                                     (Elf_Addr)obj->relocbase;
 356                                 if ((Elf_Addr)(*got) == (Elf_Addr)obj->relocbase) {
 357                                         dbg("Warning3, i:%d maps to relocbase address:%p",
 358                                             i, obj->relocbase);
 359                                 }
 360                         }
 361                 } else {
 362                         /* TODO: add cache here */
 363                         def = find_symdef(i, obj, &defobj, flags, NULL,
 364                             lockstate);
 365                         if (def == NULL) {
 366                                 dbg("Warning4, can't find symbole %d", i);
 367                                 return -1;
 368                         }
 369                         *got = def->st_value + (Elf_Addr)defobj->relocbase;
 370                         if ((Elf_Addr)(*got) == (Elf_Addr)obj->relocbase) {
 371                                 dbg("Warning4, i:%d maps to relocbase address:%p",
 372                                     i, obj->relocbase);
 373                                 dbg("via first obj symbol %s",
 374                                     obj->strtab + obj->symtab[i].st_name);
 375                                 dbg("found in obj %p:%s",
 376                                     defobj, defobj->path);
 377                         }
 378                 }
 379
 380                 dbg("  --> now %lx", (u_long) *got);
 381                 ++sym;
 382                 ++got;
 383         }
 384
 385         got = obj->pltgot;
 386         rellim = (const Elf_Rel *)((caddr_t)obj->rel + obj->relsize);
 387         for (rel = obj->rel; rel < rellim; rel++) {
 388                 Elf_Word        r_symndx, r_type;
 389                 void            *where;
 390
 391                 where = obj->relocbase + rel->r_offset;
 392                 r_symndx = ELF_R_SYM(rel->r_info);
 393                 r_type = ELF_R_TYPE(rel->r_info);
 394
 395                 switch (r_type & 0xff) {
 396                 case R_TYPE(NONE):
 397                         break;
 398
 399                 case R_TYPE(REL32): {
 400                         /* 32-bit PC-relative reference */
 401                         const size_t rlen =
 402                             ELF_R_NXTTYPE_64_P(r_type)
 403                                 ? sizeof(Elf_Sxword)
 404                                 : sizeof(Elf_Sword);
 405                         Elf_Sxword old = load_ptr(where, rlen);
 406                         Elf_Sxword val = old;
 407
 408                         def = obj->symtab + r_symndx;
 409
 410                         if (r_symndx >= obj->gotsym) {
 411                                 val += got[obj->local_gotno + r_symndx - obj->gotsym];
 412                                 dbg("REL32/G(%p) %p --> %p (%s) in %s",
 413                                     where, (void *)old, (void *)val,
 414                                     obj->strtab + def->st_name,
 415                                     obj->path);
 416                         } else {
 417                                 /*
 418                                  * XXX: ABI DIFFERENCE!
 419                                  *
 420                                  * Old NetBSD binutils would generate shared
 421                                  * libs with section-relative relocations being
 422                                  * already adjusted for the start address of
 423                                  * the section.
 424                                  *
 425                                  * New binutils, OTOH, generate shared libs
 426                                  * with the same relocations being based at
 427                                  * zero, so we need to add in the start address
 428                                  * of the section.
 429                                  *
 430                                  * --rkb, Oct 6, 2001
 431                                  */
 432
 433                                 if (def->st_info ==
 434                                     ELF_ST_INFO(STB_LOCAL, STT_SECTION)
 435 #ifdef SUPPORT_OLD_BROKEN_LD
 436                                     && !broken
 437 #endif
 438                                     )
 439                                         val += (Elf_Addr)def->st_value;
 440
 441                                 val += (Elf_Addr)obj->relocbase;
 442
 443                                 dbg("REL32/L(%p) %p -> %p (%s) in %s",
 444                                     where, (void *)old, (void *)val,
 445                                     obj->strtab + def->st_name, obj->path);
 446                         }
 447                         store_ptr(where, val, rlen);
 448                         break;
 449                 }
 450
 451 #ifdef __mips_n64
 452                 case R_TYPE(TLS_DTPMOD64):
 453 #else
 454                 case R_TYPE(TLS_DTPMOD32):
 455 #endif
 456                 {
 457
 458                         const size_t rlen = sizeof(Elf_Addr);
 459                         Elf_Addr old = load_ptr(where, rlen);
 460                         Elf_Addr val = old;
 461
 462                         def = find_symdef(r_symndx, obj, &defobj, flags, NULL,
 463                                 lockstate);
 464                         if (def == NULL)
 465                                 return -1;
 466
 467                         val += (Elf_Addr)defobj->tlsindex;
 468
 469                         store_ptr(where, val, rlen);
 470                         dbg("DTPMOD %s in %s %p --> %p in %s",
 471                             obj->strtab + obj->symtab[r_symndx].st_name,
 472                             obj->path, (void *)old, (void*)val, defobj->path);
 473                         break;
 474                 }
 475
 476 #ifdef __mips_n64
 477                 case R_TYPE(TLS_DTPREL64):
 478 #else
 479                 case R_TYPE(TLS_DTPREL32):
 480 #endif
 481                 {
 482                         const size_t rlen = sizeof(Elf_Addr);
 483                         Elf_Addr old = load_ptr(where, rlen);
 484                         Elf_Addr val = old;
 485
 486                         def = find_symdef(r_symndx, obj, &defobj, flags, NULL,
 487                                 lockstate);
 488                         if (def == NULL)
 489                                 return -1;
 490
 491                         if (!defobj->tls_done && allocate_tls_offset(obj))
 492                                 return -1;
 493
 494                         val += (Elf_Addr)def->st_value - TLS_DTP_OFFSET;
 495                         store_ptr(where, val, rlen);
 496
 497                         dbg("DTPREL %s in %s %p --> %p in %s",
 498                             obj->strtab + obj->symtab[r_symndx].st_name,
 499                             obj->path, (void*)old, (void *)val, defobj->path);
 500                         break;
 501                 }
 502
 503 #ifdef __mips_n64
 504                 case R_TYPE(TLS_TPREL64):
 505 #else
 506                 case R_TYPE(TLS_TPREL32):
 507 #endif
 508                 {
 509                         const size_t rlen = sizeof(Elf_Addr);
 510                         Elf_Addr old = load_ptr(where, rlen);
 511                         Elf_Addr val = old;
 512
 513                         def = find_symdef(r_symndx, obj, &defobj, flags, NULL,
 514                                 lockstate);
 515
 516                         if (def == NULL)
 517                                 return -1;
 518
 519                         if (!defobj->tls_done && allocate_tls_offset(obj))
 520                                 return -1;
 521
 522                         val += (Elf_Addr)(def->st_value + defobj->tlsoffset
 523                             - TLS_TP_OFFSET - TLS_TCB_SIZE);
 524                         store_ptr(where, val, rlen);
 525
 526                         dbg("TPREL %s in %s %p --> %p in %s",
 527                             obj->strtab + obj->symtab[r_symndx].st_name,
 528                             obj->path, (void*)old, (void *)val, defobj->path);
 529                         break;
 530                 }
 531
 532
 533
 534                 default:
 535                         dbg("sym = %lu, type = %lu, offset = %p, "
 536                             "contents = %p, symbol = %s",
 537                             (u_long)r_symndx, (u_long)ELF_R_TYPE(rel->r_info),
 538                             (void *)rel->r_offset,
 539                             (void *)load_ptr(where, sizeof(Elf_Sword)),
 540                             obj->strtab + obj->symtab[r_symndx].st_name);
 541                         _rtld_error("%s: Unsupported relocation type %ld "
 542                             "in non-PLT relocations",
 543                             obj->path, (u_long) ELF_R_TYPE(rel->r_info));
 544                         return -1;
 545                 }
 546         }
 547
 548         return 0;
 549 }
 550
 551 /*
 552  *  Process the PLT relocations.
 553  */
 554 int
 555 reloc_plt(Obj_Entry *obj)
 556 {
 557 #if 0
 558         const Elf_Rel *rellim;
 559         const Elf_Rel *rel;
 560
 561         dbg("reloc_plt obj:%p pltrel:%p sz:%s", obj, obj->pltrel, (int)obj->pltrelsize);
 562         dbg("gottable %p num syms:%s", obj->pltgot, obj->symtabno );
 563         dbg("*****************************************************");
 564         rellim = (const Elf_Rel *)((char *)obj->pltrel +
 565             obj->pltrelsize);
 566         for (rel = obj->pltrel;  rel < rellim;  rel++) {
 567                 Elf_Addr *where;
 568                 where = (Elf_Addr *)(obj->relocbase + rel->r_offset);
 569                 *where += (Elf_Addr )obj->relocbase;
 570         }
 571
 572 #endif
 573         /* PLT fixups were done above in the GOT relocation. */
 574         return (0);
 575 }
 576
 577 /*
 578  * LD_BIND_NOW was set - force relocation for all jump slots
 579  */
 580 int
 581 reloc_jmpslots(Obj_Entry *obj, int flags, RtldLockState *lockstate)
 582 {
 583         /* Do nothing */
 584         obj->jmpslots_done = true;
 585
 586         return (0);
 587 }
 588
 589 int
 590 reloc_iresolve(Obj_Entry *obj, struct Struct_RtldLockState *lockstate)
 591 {
 592
 593         /* XXX not implemented */
 594         return (0);
 595 }
 596
 597 int
 598 reloc_gnu_ifunc(Obj_Entry *obj, int flags,
 599     struct Struct_RtldLockState *lockstate)
 600 {
 601
 602         /* XXX not implemented */
 603         return (0);
 604 }
 605
 606 Elf_Addr
 607 reloc_jmpslot(Elf_Addr *where, Elf_Addr target, const Obj_Entry *defobj,
 608                 const Obj_Entry *obj, const Elf_Rel *rel)
 609 {
 610
 611         /* Do nothing */
 612
 613         return target;
 614 }
 615
 616 void
 617 allocate_initial_tls(Obj_Entry *objs)
 618 {
 619         char *tls;
 620
 621         /*
 622          * Fix the size of the static TLS block by using the maximum
 623          * offset allocated so far and adding a bit for dynamic modules to
 624          * use.
 625          */
 626         tls_static_space = tls_last_offset + tls_last_size + RTLD_STATIC_TLS_EXTRA;
 627
 628         tls = (char *) allocate_tls(objs, NULL, TLS_TCB_SIZE, 8);
 629
 630         sysarch(MIPS_SET_TLS, tls);
 631 }
 632
 633 void *
 634 __tls_get_addr(tls_index* ti)
 635 {
 636         Elf_Addr** tls;
 637         char *p;
 638
 639         sysarch(MIPS_GET_TLS, &tls);
 640
 641         p = tls_get_addr_common(tls, ti->ti_module, ti->ti_offset + TLS_DTP_OFFSET);
 642
 643         return (p);
 644 }