1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1988 AT&T 24 * All Rights Reserved 25 * 26 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <string.h> 32 #include <stdio.h> 33 #include <sys/elf_SPARC.h> 34 #include <debug.h> 35 #include <reloc.h> 36 #include "msg.h" 37 #include "_libld.h" 38 39 /* 40 * Local Variable Definitions 41 */ 42 static Sword neggotoffset = 0; /* off. of GOT table from GOT symbol */ 43 static Sword smlgotcnt = M_GOT_XNumber; /* no. of small GOT symbols */ 44 45 Word 46 ld_init_rel(Rel_desc *reld, void *reloc) 47 { 48 Rela * rela = (Rela *)reloc; 49 50 /* LINTED */ 51 reld->rel_rtype = (Word)ELF_R_TYPE(rela->r_info); 52 reld->rel_roffset = rela->r_offset; 53 reld->rel_raddend = rela->r_addend; 54 reld->rel_typedata = (Word)ELF_R_TYPE_DATA(rela->r_info); 55 56 reld->rel_flags |= FLG_REL_RELA; 57 58 return ((Word)ELF_R_SYM(rela->r_info)); 59 } 60 61 void 62 ld_mach_eflags(Ehdr *ehdr, Ofl_desc *ofl) 63 { 64 Word eflags = ofl->ofl_dehdr->e_flags; 65 Word memopt1, memopt2; 66 static int firstpass; 67 68 /* 69 * If a *PLUS relocatable is included, the output object is type *PLUS. 70 */ 71 if ((ehdr->e_machine == EM_SPARC32PLUS) && 72 (ehdr->e_flags & EF_SPARC_32PLUS)) 73 ofl->ofl_dehdr->e_machine = EM_SPARC32PLUS; 74 75 /* 76 * On the first pass, we don't yet have a memory model to compare 77 * against, therefore the initial file becomes our baseline. Subsequent 78 * passes will do the comparison described below. 79 */ 80 if (firstpass == 0) { 81 ofl->ofl_dehdr->e_flags |= ehdr->e_flags; 82 firstpass++; 83 return; 84 } 85 86 /* 87 * Determine which memory model to mark the binary with. The options 88 * are (most restrictive to least): 89 * 90 * EF_SPARCV9_TSO 0x0 Total Store Order 91 * EF_SPARCV9_PSO 0x1 Partial Store Order 92 * EF_SPARCV9_RMO 0x2 Relaxed Memory Order 93 * 94 * Mark the binary with the most restrictive option encountered from a 95 * relocatable object included in the link. 96 */ 97 eflags |= (ehdr->e_flags & ~EF_SPARCV9_MM); 98 memopt1 = eflags & EF_SPARCV9_MM; 99 memopt2 = ehdr->e_flags & EF_SPARCV9_MM; 100 eflags &= ~EF_SPARCV9_MM; 101 102 if ((memopt1 == EF_SPARCV9_TSO) || (memopt2 == EF_SPARCV9_TSO)) 103 /* EMPTY */ 104 ; 105 else if ((memopt1 == EF_SPARCV9_PSO) || (memopt2 == EF_SPARCV9_PSO)) 106 eflags |= EF_SPARCV9_PSO; 107 else 108 eflags |= EF_SPARCV9_RMO; 109 110 ofl->ofl_dehdr->e_flags = eflags; 111 } 112 113 void 114 ld_mach_make_dynamic(Ofl_desc *ofl, size_t *cnt) 115 { 116 if (!(ofl->ofl_flags & FLG_OF_RELOBJ)) { 117 /* 118 * Create this entry if we are going to create a PLT table. 119 */ 120 if (ofl->ofl_pltcnt) 121 (*cnt)++; /* DT_PLTGOT */ 122 } 123 } 124 125 void 126 ld_mach_update_odynamic(Ofl_desc * ofl, Dyn ** dyn) 127 { 128 if (((ofl->ofl_flags & FLG_OF_RELOBJ) == 0) && ofl->ofl_pltcnt) { 129 (*dyn)->d_tag = DT_PLTGOT; 130 if (ofl->ofl_osplt) 131 (*dyn)->d_un.d_ptr = ofl->ofl_osplt->os_shdr->sh_addr; 132 else 133 (*dyn)->d_un.d_ptr = 0; 134 (*dyn)++; 135 } 136 } 137 138 #if defined(_ELF64) 139 140 Xword 141 ld_calc_plt_addr(Sym_desc *sdp, Ofl_desc *ofl) 142 { 143 Xword value, pltndx, farpltndx; 144 145 pltndx = sdp->sd_aux->sa_PLTndx + M_PLT_XNumber - 1; 146 147 if ((pltndx) < M64_PLT_NEARPLTS) { 148 value = (Xword)(ofl->ofl_osplt->os_shdr->sh_addr) + 149 (pltndx * M_PLT_ENTSIZE); 150 return (value); 151 } 152 153 farpltndx = pltndx - M64_PLT_NEARPLTS; 154 155 /* 156 * pltoffset of a far plt is calculated by: 157 * 158 * <size of near plt table> + 159 * <size of preceding far plt blocks> + 160 * <blockndx * sizeof (far plt entsize)> 161 */ 162 value = 163 /* size of near plt table */ 164 (M64_PLT_NEARPLTS * M_PLT_ENTSIZE) + 165 /* size of preceding far plt blocks */ 166 ((farpltndx / M64_PLT_FBLKCNTS) * 167 ((M64_PLT_FENTSIZE + sizeof (Addr)) * 168 M64_PLT_FBLKCNTS)) + 169 /* pltblockendx * fentsize */ 170 ((farpltndx % M64_PLT_FBLKCNTS) * M64_PLT_FENTSIZE); 171 172 value += (Xword)(ofl->ofl_osplt->os_shdr->sh_addr); 173 return (value); 174 } 175 176 /* 177 * Instructions required for Far PLT's 178 */ 179 static uint32_t farplt_instrs[6] = { 180 0x8a10000f, /* mov %o7, %g5 */ 181 0x40000002, /* call . + 0x8 */ 182 0x01000000, /* nop */ 183 0xc25be000, /* ldx [%o7 + 0], %g1 */ 184 0x83c3c001, /* jmpl %o7 + %g1, %g1 */ 185 0x9e100005 /* mov %g5, %o7 */ 186 }; 187 188 /* 189 * Far PLT'S: 190 * 191 * Far PLT's are established in blocks of '160' at a time. These 192 * PLT's consist of 6 instructions (24 bytes) and 1 pointer (8 bytes). 193 * The instructions are collected together in blocks of 160 entries 194 * followed by 160 pointers. The last group of entries and pointers 195 * may contain less then 160 items. No padding is required. 196 * 197 * .PLT32768: 198 * mov %o7, %g5 199 * call . + 8 200 * nop 201 * ldx [%o7 + .PLTP32768 - (.PLT32768 + 4)], %g1 202 * jmpl %o7 + %g1, %g1 203 * mov %g5, %o7 204 * ................................ 205 * .PLT32927: 206 * mov %o7, %g5 207 * call . + 8 208 * nop 209 * ldx [%o7 + .PLTP32927 - (.PLT32927 + 4)], %g1 210 * jmpl %o7 + %g1, %g1 211 * mov %g5, %o7 212 * .PLTP32768: 213 * .xword .PLT0-(.PLT32768+4) 214 * ................................ 215 * .PLTP32927: 216 * .xword .PLT0-(.PLT32927+4) 217 * 218 */ 219 void 220 plt_far_entry(Ofl_desc *ofl, Xword pltndx, Xword *roffset, Sxword *raddend) 221 { 222 uint_t blockndx; /* # of far PLT blocks */ 223 uint_t farblkcnt; /* Index to far PLT block */ 224 Xword farpltndx; /* index of Far Plt */ 225 Xword farpltblkndx; /* index of PLT in BLOCK */ 226 uint32_t *pltent; /* ptr to plt instr. sequence */ 227 uint64_t *pltentptr; /* ptr to plt addr ptr */ 228 Sxword pltblockoff; /* offset to Far plt block */ 229 Sxword pltoff; /* offset to PLT instr. sequence */ 230 Sxword pltptroff; /* offset to PLT addr ptr */ 231 uchar_t *pltbuf; /* ptr to PLT's in file */ 232 233 234 farblkcnt = ((ofl->ofl_pltcnt - 1 + 235 M_PLT_XNumber - M64_PLT_NEARPLTS) / M64_PLT_FBLKCNTS); 236 237 /* 238 * Determine the 'Far' PLT index. 239 */ 240 farpltndx = pltndx - 1 + M_PLT_XNumber - M64_PLT_NEARPLTS; 241 farpltblkndx = farpltndx % M64_PLT_FBLKCNTS; 242 243 /* 244 * Determine what FPLT block this plt falls into. 245 */ 246 blockndx = (uint_t)(farpltndx / M64_PLT_FBLKCNTS); 247 248 /* 249 * Calculate the starting offset of the Far PLT block 250 * that this PLT is a member of. 251 */ 252 pltblockoff = (M64_PLT_NEARPLTS * M_PLT_ENTSIZE) + 253 (blockndx * M64_PLT_FBLOCKSZ); 254 255 pltoff = pltblockoff + 256 (farpltblkndx * M64_PLT_FENTSIZE); 257 258 pltptroff = pltblockoff; 259 260 261 if (farblkcnt > blockndx) { 262 /* 263 * If this is a full block - the 'pltptroffs' start 264 * after 160 fplts. 265 */ 266 pltptroff += (M64_PLT_FBLKCNTS * M64_PLT_FENTSIZE) + 267 (farpltblkndx * M64_PLT_PSIZE); 268 } else { 269 Xword lastblkpltndx; 270 /* 271 * If this is the last block - the the pltptr's start 272 * after the last FPLT instruction sequence. 273 */ 274 lastblkpltndx = (ofl->ofl_pltcnt - 1 + M_PLT_XNumber - 275 M64_PLT_NEARPLTS) % M64_PLT_FBLKCNTS; 276 pltptroff += ((lastblkpltndx + 1) * M64_PLT_FENTSIZE) + 277 (farpltblkndx * M64_PLT_PSIZE); 278 } 279 pltbuf = (uchar_t *)ofl->ofl_osplt->os_outdata->d_buf; 280 281 /* 282 * For far-plts, the Raddend and Roffset fields are defined 283 * to be: 284 * 285 * roffset: address of .PLTP# 286 * raddend: -(.PLT#+4) 287 */ 288 *roffset = pltptroff + (Xword)(ofl->ofl_osplt->os_shdr->sh_addr); 289 *raddend = -(pltoff + 4 + (Xword)(ofl->ofl_osplt->os_shdr->sh_addr)); 290 291 /* LINTED */ 292 pltent = (uint32_t *)(pltbuf + pltoff); 293 /* LINTED */ 294 pltentptr = (uint64_t *)(pltbuf + pltptroff); 295 (void) memcpy(pltent, farplt_instrs, sizeof (farplt_instrs)); 296 297 /* 298 * update 299 * ldx [%o7 + 0], %g1 300 * to 301 * ldx [%o7 + .PLTP# - (.PLT# + 4)], %g1 302 */ 303 /* LINTED */ 304 pltent[3] |= (uint32_t)(pltptroff - (pltoff + 4)); 305 306 /* 307 * Store: 308 * .PLTP# 309 * .xword .PLT0 - .PLT# + 4 310 */ 311 *pltentptr = -(pltoff + 4); 312 } 313 314 /* 315 * Build a single V9 P.L.T. entry - code is: 316 * 317 * For Target Addresses +/- 4GB of the entry 318 * ----------------------------------------- 319 * sethi (. - .PLT0), %g1 320 * ba,a %xcc, .PLT1 321 * nop 322 * nop 323 * nop 324 * nop 325 * nop 326 * nop 327 * 328 * For Target Addresses +/- 2GB of the entry 329 * ----------------------------------------- 330 * 331 * .PLT0 is the address of the first entry in the P.L.T. 332 * This one is filled in by the run-time link editor. We just 333 * have to leave space for it. 334 */ 335 static void 336 plt_entry(Ofl_desc *ofl, Xword pltndx, Xword *roffset, Sxword *raddend) 337 { 338 uchar_t *pltent; /* PLT entry being created. */ 339 Sxword pltoff; /* Offset of this entry from PLT top */ 340 341 /* 342 * The second part of the V9 ABI (sec. 5.2.4) 343 * applies to plt entries greater than 0x8000 (32,768). 344 * This is handled in 'plt_far_entry()' 345 */ 346 if ((pltndx - 1 + M_PLT_XNumber) >= M64_PLT_NEARPLTS) { 347 plt_far_entry(ofl, pltndx, roffset, raddend); 348 return; 349 } 350 351 pltoff = M_PLT_RESERVSZ + (pltndx - 1) * M_PLT_ENTSIZE; 352 pltent = (uchar_t *)ofl->ofl_osplt->os_outdata->d_buf + 353 pltoff; 354 355 *roffset = pltoff + (Xword)(ofl->ofl_osplt->os_shdr->sh_addr); 356 *raddend = 0; 357 358 /* 359 * PLT[0]: sethi %hi(. - .L0), %g1 360 */ 361 /* LINTED */ 362 *(Word *)pltent = M_SETHIG1 | pltoff; 363 364 /* 365 * PLT[1]: ba,a %xcc, .PLT1 (.PLT1 accessed as a 366 * PC-relative index of longwords). 367 */ 368 pltent += M_PLT_INSSIZE; 369 pltoff += M_PLT_INSSIZE; 370 pltoff = -pltoff; 371 /* LINTED */ 372 *(Word *)pltent = M_BA_A_XCC | 373 (((pltoff + M_PLT_ENTSIZE) >> 2) & S_MASK(19)); 374 375 /* 376 * PLT[2]: sethi 0, %g0 (NOP for delay slot of eventual CTI). 377 */ 378 pltent += M_PLT_INSSIZE; 379 /* LINTED */ 380 *(Word *)pltent = M_NOP; 381 382 /* 383 * PLT[3]: sethi 0, %g0 (NOP for PLT padding). 384 */ 385 pltent += M_PLT_INSSIZE; 386 /* LINTED */ 387 *(Word *)pltent = M_NOP; 388 389 /* 390 * PLT[4]: sethi 0, %g0 (NOP for PLT padding). 391 */ 392 pltent += M_PLT_INSSIZE; 393 /* LINTED */ 394 *(Word *)pltent = M_NOP; 395 396 /* 397 * PLT[5]: sethi 0, %g0 (NOP for PLT padding). 398 */ 399 pltent += M_PLT_INSSIZE; 400 /* LINTED */ 401 *(Word *)pltent = M_NOP; 402 403 /* 404 * PLT[6]: sethi 0, %g0 (NOP for PLT padding). 405 */ 406 pltent += M_PLT_INSSIZE; 407 /* LINTED */ 408 *(Word *)pltent = M_NOP; 409 410 /* 411 * PLT[7]: sethi 0, %g0 (NOP for PLT padding). 412 */ 413 pltent += M_PLT_INSSIZE; 414 /* LINTED */ 415 *(Word *)pltent = M_NOP; 416 } 417 418 419 #else /* Elf 32 */ 420 421 Xword 422 ld_calc_plt_addr(Sym_desc *sdp, Ofl_desc *ofl) 423 { 424 Xword value, pltndx; 425 426 pltndx = sdp->sd_aux->sa_PLTndx + M_PLT_XNumber - 1; 427 value = (Xword)(ofl->ofl_osplt->os_shdr->sh_addr) + 428 (pltndx * M_PLT_ENTSIZE); 429 return (value); 430 } 431 432 433 /* 434 * Build a single P.L.T. entry - code is: 435 * 436 * sethi (. - .L0), %g1 437 * ba,a .L0 438 * sethi 0, %g0 (nop) 439 * 440 * .L0 is the address of the first entry in the P.L.T. 441 * This one is filled in by the run-time link editor. We just 442 * have to leave space for it. 443 */ 444 static void 445 plt_entry(Ofl_desc * ofl, Xword pltndx, Xword *roffset, Sxword *raddend) 446 { 447 Byte * pltent; /* PLT entry being created. */ 448 Sxword pltoff; /* Offset of this entry from PLT top */ 449 450 pltoff = M_PLT_RESERVSZ + (pltndx - 1) * M_PLT_ENTSIZE; 451 pltent = (Byte *)ofl->ofl_osplt->os_outdata->d_buf + pltoff; 452 453 *roffset = pltoff + (Xword)(ofl->ofl_osplt->os_shdr->sh_addr); 454 *raddend = 0; 455 456 /* 457 * PLT[0]: sethi %hi(. - .L0), %g1 458 */ 459 /* LINTED */ 460 *(Word *)pltent = M_SETHIG1 | pltoff; 461 462 /* 463 * PLT[1]: ba,a .L0 (.L0 accessed as a PC-relative index of longwords) 464 */ 465 pltent += M_PLT_INSSIZE; 466 pltoff += M_PLT_INSSIZE; 467 pltoff = -pltoff; 468 /* LINTED */ 469 *(Word *)pltent = M_BA_A | ((pltoff >> 2) & S_MASK(22)); 470 471 /* 472 * PLT[2]: sethi 0, %g0 (NOP for delay slot of eventual CTI). 473 */ 474 pltent += M_PLT_INSSIZE; 475 /* LINTED */ 476 *(Word *)pltent = M_SETHIG0; 477 478 /* 479 * PLT[3]: sethi 0, %g0 (NOP for PLT padding). 480 */ 481 pltent += M_PLT_INSSIZE; 482 /* LINTED */ 483 *(Word *)pltent = M_SETHIG0; 484 } 485 486 #endif /* _ELF64 */ 487 488 uintptr_t 489 ld_perform_outreloc(Rel_desc * orsp, Ofl_desc * ofl) 490 { 491 Os_desc * relosp, * osp = 0; 492 Xword ndx, roffset, value; 493 Sxword raddend; 494 const Rel_entry * rep; 495 Rela rea; 496 char *relbits; 497 Sym_desc * sdp, * psym = (Sym_desc *)0; 498 int sectmoved = 0; 499 Word dtflags1 = ofl->ofl_dtflags_1; 500 Word flags = ofl->ofl_flags; 501 502 raddend = orsp->rel_raddend; 503 sdp = orsp->rel_sym; 504 505 /* 506 * Special case, a regsiter symbol associated with symbol 507 * index 0 is initialized (i.e. relocated) to a constant 508 * in the r_addend field rather than to a symbol value. 509 */ 510 if ((orsp->rel_rtype == M_R_REGISTER) && !sdp) { 511 relosp = ofl->ofl_osrel; 512 relbits = (char *)relosp->os_outdata->d_buf; 513 514 rea.r_info = ELF_R_INFO(0, 515 ELF_R_TYPE_INFO(orsp->rel_typedata, orsp->rel_rtype)); 516 rea.r_offset = orsp->rel_roffset; 517 rea.r_addend = raddend; 518 DBG_CALL(Dbg_reloc_out(ofl, ELF_DBG_LD, SHT_RELA, &rea, 519 relosp->os_name, orsp->rel_sname)); 520 521 assert(relosp->os_szoutrels <= relosp->os_shdr->sh_size); 522 (void) memcpy((relbits + relosp->os_szoutrels), 523 (char *)&rea, sizeof (Rela)); 524 relosp->os_szoutrels += (Xword)sizeof (Rela); 525 526 return (1); 527 } 528 529 /* 530 * If the section this relocation is against has been discarded 531 * (-zignore), then also discard (skip) the relocation itself. 532 */ 533 if (orsp->rel_isdesc && ((orsp->rel_flags & 534 (FLG_REL_GOT | FLG_REL_BSS | FLG_REL_PLT | FLG_REL_NOINFO)) == 0) && 535 (orsp->rel_isdesc->is_flags & FLG_IS_DISCARD)) { 536 DBG_CALL(Dbg_reloc_discard(ofl->ofl_lml, M_MACH, orsp)); 537 return (1); 538 } 539 540 /* 541 * If this is a relocation against a move table, or expanded move 542 * table, adjust the relocation entries. 543 */ 544 if (orsp->rel_move) 545 ld_adj_movereloc(ofl, orsp); 546 547 /* 548 * If this is a relocation against a section then we need to adjust the 549 * raddend field to compensate for the new position of the input section 550 * within the new output section. 551 */ 552 if (ELF_ST_TYPE(sdp->sd_sym->st_info) == STT_SECTION) { 553 if (ofl->ofl_parsym.head && 554 (sdp->sd_isc->is_flags & FLG_IS_RELUPD) && 555 (psym = ld_am_I_partial(orsp, orsp->rel_raddend))) { 556 /* 557 * If the symbol is moved, adjust the value 558 */ 559 DBG_CALL(Dbg_move_outsctadj(ofl->ofl_lml, psym)); 560 sectmoved = 1; 561 if (ofl->ofl_flags & FLG_OF_RELOBJ) 562 raddend = psym->sd_sym->st_value; 563 else 564 raddend = psym->sd_sym->st_value - 565 psym->sd_isc->is_osdesc->os_shdr->sh_addr; 566 /* LINTED */ 567 raddend += (Off)_elf_getxoff(psym->sd_isc->is_indata); 568 if (psym->sd_isc->is_shdr->sh_flags & SHF_ALLOC) 569 raddend += 570 psym->sd_isc->is_osdesc->os_shdr->sh_addr; 571 } else { 572 /* LINTED */ 573 raddend += (Off)_elf_getxoff(sdp->sd_isc->is_indata); 574 if (sdp->sd_isc->is_shdr->sh_flags & SHF_ALLOC) 575 raddend += 576 sdp->sd_isc->is_osdesc->os_shdr->sh_addr; 577 } 578 } 579 580 value = sdp->sd_sym->st_value; 581 582 if (orsp->rel_flags & FLG_REL_GOT) { 583 osp = ofl->ofl_osgot; 584 roffset = ld_calc_got_offset(orsp, ofl); 585 586 } else if (orsp->rel_flags & FLG_REL_PLT) { 587 osp = ofl->ofl_osplt; 588 plt_entry(ofl, sdp->sd_aux->sa_PLTndx, &roffset, &raddend); 589 } else if (orsp->rel_flags & FLG_REL_BSS) { 590 /* 591 * This must be a R_SPARC_COPY. For these set the roffset to 592 * point to the new symbols location. 593 */ 594 osp = ofl->ofl_isbss->is_osdesc; 595 roffset = (Xword)value; 596 597 /* 598 * The raddend doesn't mean anything in an R_SPARC_COPY 599 * relocation. Null it out because it can confuse people. 600 */ 601 raddend = 0; 602 } else if (orsp->rel_flags & FLG_REL_REG) { 603 /* 604 * The offsets of relocations against register symbols 605 * identifiy the register directly - so the offset 606 * does not need to be adjusted. 607 */ 608 roffset = orsp->rel_roffset; 609 } else { 610 osp = orsp->rel_osdesc; 611 612 /* 613 * Calculate virtual offset of reference point; equals offset 614 * into section + vaddr of section for loadable sections, or 615 * offset plus section displacement for nonloadable sections. 616 */ 617 roffset = orsp->rel_roffset + 618 (Off)_elf_getxoff(orsp->rel_isdesc->is_indata); 619 if (!(ofl->ofl_flags & FLG_OF_RELOBJ)) 620 roffset += orsp->rel_isdesc->is_osdesc-> 621 os_shdr->sh_addr; 622 } 623 624 if ((osp == 0) || ((relosp = osp->os_relosdesc) == 0)) 625 relosp = ofl->ofl_osrel; 626 627 /* 628 * Verify that the output relocations offset meets the 629 * alignment requirements of the relocation being processed. 630 */ 631 rep = &reloc_table[orsp->rel_rtype]; 632 if (((flags & FLG_OF_RELOBJ) || !(dtflags1 & DF_1_NORELOC)) && 633 !(rep->re_flags & FLG_RE_UNALIGN)) { 634 if (((rep->re_fsize == 2) && (roffset & 0x1)) || 635 ((rep->re_fsize == 4) && (roffset & 0x3)) || 636 ((rep->re_fsize == 8) && (roffset & 0x7))) { 637 eprintf(ofl->ofl_lml, ERR_FATAL, 638 MSG_INTL(MSG_REL_NONALIGN), 639 conv_reloc_SPARC_type(orsp->rel_rtype), 640 orsp->rel_isdesc->is_file->ifl_name, 641 demangle(orsp->rel_sname), EC_XWORD(roffset)); 642 return (S_ERROR); 643 } 644 } 645 646 /* 647 * Assign the symbols index for the output relocation. If the 648 * relocation refers to a SECTION symbol then it's index is based upon 649 * the output sections symbols index. Otherwise the index can be 650 * derived from the symbols index itself. 651 */ 652 if (orsp->rel_rtype == R_SPARC_RELATIVE) 653 ndx = STN_UNDEF; 654 else if ((orsp->rel_flags & FLG_REL_SCNNDX) || 655 (ELF_ST_TYPE(sdp->sd_sym->st_info) == STT_SECTION)) { 656 if (sectmoved == 0) { 657 /* 658 * Check for a null input section. This can 659 * occur if this relocation references a symbol 660 * generated by sym_add_sym(). 661 */ 662 if ((sdp->sd_isc != 0) && 663 (sdp->sd_isc->is_osdesc != 0)) 664 ndx = sdp->sd_isc->is_osdesc->os_scnsymndx; 665 else 666 ndx = sdp->sd_shndx; 667 } else 668 ndx = ofl->ofl_sunwdata1ndx; 669 } else 670 ndx = sdp->sd_symndx; 671 672 /* 673 * Add the symbols 'value' to the addend field. 674 */ 675 if (orsp->rel_flags & FLG_REL_ADVAL) 676 raddend += value; 677 678 /* 679 * addend field for R_SPARC_TLS_DTPMOD32 && 680 * R_SPARC_TLS_DTPMOD64 mean nothing. The addend 681 * is propogated in the corresponding R_SPARC_TLS_DTPOFF* 682 * relocations. 683 */ 684 if (orsp->rel_rtype == M_R_DTPMOD) { 685 raddend = 0; 686 } 687 688 relbits = (char *)relosp->os_outdata->d_buf; 689 690 rea.r_info = ELF_R_INFO(ndx, ELF_R_TYPE_INFO(orsp->rel_typedata, 691 orsp->rel_rtype)); 692 rea.r_offset = roffset; 693 rea.r_addend = raddend; 694 DBG_CALL(Dbg_reloc_out(ofl, ELF_DBG_LD, SHT_RELA, &rea, relosp->os_name, 695 orsp->rel_sname)); 696 697 /* 698 * Assert we haven't walked off the end of our relocation table. 699 */ 700 assert(relosp->os_szoutrels <= relosp->os_shdr->sh_size); 701 702 (void) memcpy((relbits + relosp->os_szoutrels), 703 (char *)&rea, sizeof (Rela)); 704 relosp->os_szoutrels += (Xword)sizeof (Rela); 705 706 /* 707 * Determine if this relocation is against a non-writable, allocatable 708 * section. If so we may need to provide a text relocation diagnostic. 709 */ 710 ld_reloc_remain_entry(orsp, osp, ofl); 711 return (1); 712 } 713 714 715 /* 716 * Sparc Instructions for TLS processing 717 */ 718 #if defined(_ELF64) 719 #define TLS_GD_IE_LD 0xd0580000 /* ldx [%g0 + %g0], %o0 */ 720 #else 721 #define TLS_GD_IE_LD 0xd0000000 /* ld [%g0 + %g0], %o0 */ 722 #endif 723 #define TLS_GD_IE_ADD 0x9001c008 /* add %g7, %o0, %o0 */ 724 725 #define TLS_GD_LE_XOR 0x80182000 /* xor %g0, 0, %g0 */ 726 #define TLS_IE_LE_OR 0x80100000 /* or %g0, %o0, %o1 */ 727 /* synthetic: mov %g0, %g0 */ 728 729 #define TLS_LD_LE_CLRO0 0x90100000 /* clr %o0 */ 730 731 #define FM3_REG_MSK_RD (0x1f << 25) /* Formate (3) rd register mask */ 732 /* bits 25->29 */ 733 #define FM3_REG_MSK_RS1 (0x1f << 14) /* Formate (3) rs1 register mask */ 734 /* bits 14->18 */ 735 #define FM3_REG_MSK_RS2 0x1f /* Formate (3) rs2 register mask */ 736 /* bits 0->4 */ 737 738 #define REG_G7 7 /* %g7 register */ 739 740 static Fixupret 741 tls_fixups(Ofl_desc *ofl, Rel_desc *arsp) 742 { 743 Sym_desc *sdp = arsp->rel_sym; 744 Word rtype = arsp->rel_rtype; 745 uint_t *offset; 746 747 offset = (uint_t *)((uintptr_t)arsp->rel_roffset + 748 (uintptr_t)_elf_getxoff(arsp->rel_isdesc->is_indata) + 749 (uintptr_t)arsp->rel_osdesc->os_outdata->d_buf); 750 751 if (sdp->sd_ref == REF_DYN_NEED) { 752 /* 753 * IE reference model 754 */ 755 switch (rtype) { 756 case R_SPARC_TLS_GD_HI22: 757 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 758 rtype, R_SPARC_TLS_IE_HI22, arsp->rel_roffset, 759 sdp->sd_name)); 760 arsp->rel_rtype = R_SPARC_TLS_IE_HI22; 761 return (FIX_RELOC); 762 763 case R_SPARC_TLS_GD_LO10: 764 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 765 rtype, R_SPARC_TLS_IE_LO10, arsp->rel_roffset, 766 sdp->sd_name)); 767 arsp->rel_rtype = R_SPARC_TLS_IE_LO10; 768 return (FIX_RELOC); 769 770 case R_SPARC_TLS_GD_ADD: 771 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 772 rtype, R_SPARC_NONE, arsp->rel_roffset, 773 sdp->sd_name)); 774 *offset = (TLS_GD_IE_LD | 775 (*offset & (FM3_REG_MSK_RS1 | FM3_REG_MSK_RS2))); 776 return (FIX_DONE); 777 778 case R_SPARC_TLS_GD_CALL: 779 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 780 rtype, R_SPARC_NONE, arsp->rel_roffset, 781 sdp->sd_name)); 782 *offset = TLS_GD_IE_ADD; 783 return (FIX_DONE); 784 } 785 return (FIX_RELOC); 786 } 787 788 /* 789 * LE reference model 790 */ 791 switch (rtype) { 792 case R_SPARC_TLS_IE_HI22: 793 case R_SPARC_TLS_GD_HI22: 794 case R_SPARC_TLS_LDO_HIX22: 795 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 796 R_SPARC_TLS_LE_HIX22, arsp->rel_roffset, sdp->sd_name)); 797 arsp->rel_rtype = R_SPARC_TLS_LE_HIX22; 798 return (FIX_RELOC); 799 800 case R_SPARC_TLS_LDO_LOX10: 801 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 802 R_SPARC_TLS_LE_LOX10, arsp->rel_roffset, sdp->sd_name)); 803 arsp->rel_rtype = R_SPARC_TLS_LE_LOX10; 804 return (FIX_RELOC); 805 806 case R_SPARC_TLS_IE_LO10: 807 case R_SPARC_TLS_GD_LO10: 808 /* 809 * Current instruction is: 810 * 811 * or r1, %lo(x), r2 812 * or 813 * add r1, %lo(x), r2 814 * 815 * 816 * Need to udpate this to: 817 * 818 * xor r1, %lox(x), r2 819 */ 820 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 821 R_SPARC_TLS_LE_LOX10, arsp->rel_roffset, sdp->sd_name)); 822 *offset = TLS_GD_LE_XOR | 823 (*offset & (FM3_REG_MSK_RS1 | FM3_REG_MSK_RD)); 824 arsp->rel_rtype = R_SPARC_TLS_LE_LOX10; 825 return (FIX_RELOC); 826 827 case R_SPARC_TLS_IE_LD: 828 case R_SPARC_TLS_IE_LDX: 829 /* 830 * Current instruction: 831 * ld{x} [r1 + r2], r3 832 * 833 * Need to update this to: 834 * 835 * mov r2, r3 (or %g0, r2, r3) 836 */ 837 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 838 R_SPARC_NONE, arsp->rel_roffset, sdp->sd_name)); 839 *offset = ((*offset) & (FM3_REG_MSK_RS2 | FM3_REG_MSK_RD)) | 840 TLS_IE_LE_OR; 841 return (FIX_DONE); 842 843 case R_SPARC_TLS_LDO_ADD: 844 case R_SPARC_TLS_GD_ADD: 845 /* 846 * Current instruction is: 847 * 848 * add gptr_reg, r2, r3 849 * 850 * Need to updated this to: 851 * 852 * add %g7, r2, r3 853 */ 854 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 855 R_SPARC_NONE, arsp->rel_roffset, sdp->sd_name)); 856 *offset = *offset & (~FM3_REG_MSK_RS1); 857 *offset = *offset | (REG_G7 << 14); 858 return (FIX_DONE); 859 860 case R_SPARC_TLS_LDM_CALL: 861 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 862 R_SPARC_NONE, arsp->rel_roffset, sdp->sd_name)); 863 *offset = TLS_LD_LE_CLRO0; 864 return (FIX_DONE); 865 866 case R_SPARC_TLS_LDM_HI22: 867 case R_SPARC_TLS_LDM_LO10: 868 case R_SPARC_TLS_LDM_ADD: 869 case R_SPARC_TLS_IE_ADD: 870 case R_SPARC_TLS_GD_CALL: 871 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 872 R_SPARC_NONE, arsp->rel_roffset, sdp->sd_name)); 873 *offset = M_NOP; 874 return (FIX_DONE); 875 } 876 return (FIX_RELOC); 877 } 878 879 #define GOTOP_ADDINST 0x80000000 /* add %g0, %g0, %g0 */ 880 881 static Fixupret 882 gotop_fixups(Ofl_desc *ofl, Rel_desc *arsp) 883 { 884 Sym_desc *sdp = arsp->rel_sym; 885 Word rtype = arsp->rel_rtype; 886 uint_t *offset; 887 const char *ifl_name; 888 889 switch (rtype) { 890 case R_SPARC_GOTDATA_OP_HIX22: 891 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 892 R_SPARC_GOTDATA_HIX22, arsp->rel_roffset, sdp->sd_name)); 893 arsp->rel_rtype = R_SPARC_GOTDATA_HIX22; 894 return (FIX_RELOC); 895 896 case R_SPARC_GOTDATA_OP_LOX10: 897 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 898 R_SPARC_GOTDATA_LOX10, arsp->rel_roffset, sdp->sd_name)); 899 arsp->rel_rtype = R_SPARC_GOTDATA_LOX10; 900 return (FIX_RELOC); 901 902 case R_SPARC_GOTDATA_OP: 903 /* 904 * Current instruction: 905 * ld{x} [r1 + r2], r3 906 * 907 * Need to update this to: 908 * 909 * add r1, r2, r3 910 */ 911 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 912 R_SPARC_NONE, arsp->rel_roffset, sdp->sd_name)); 913 offset = (uint_t *)(uintptr_t)(arsp->rel_roffset + 914 _elf_getxoff(arsp->rel_isdesc->is_indata) + 915 (uintptr_t)arsp->rel_osdesc->os_outdata->d_buf); 916 917 *offset = ((*offset) & (FM3_REG_MSK_RS1 | 918 FM3_REG_MSK_RS2 | FM3_REG_MSK_RD)) | GOTOP_ADDINST; 919 return (FIX_DONE); 920 } 921 /* 922 * We should not get here 923 */ 924 if (arsp->rel_isdesc->is_file) 925 ifl_name = arsp->rel_isdesc->is_file->ifl_name; 926 else 927 ifl_name = MSG_INTL(MSG_STR_NULL); 928 929 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_REL_BADGOTFIX), 930 conv_reloc_SPARC_type(arsp->rel_rtype), 931 ifl_name, demangle(arsp->rel_sname)); 932 933 assert(0); 934 return (FIX_ERROR); 935 } 936 937 uintptr_t 938 ld_do_activerelocs(Ofl_desc *ofl) 939 { 940 Rel_desc *arsp; 941 Rel_cache *rcp; 942 Listnode *lnp; 943 uintptr_t return_code = 1; 944 Word flags = ofl->ofl_flags; 945 Word dtflags1 = ofl->ofl_dtflags_1; 946 947 DBG_CALL(Dbg_reloc_doact_title(ofl->ofl_lml)); 948 /* 949 * Process active relocations. 950 */ 951 for (LIST_TRAVERSE(&ofl->ofl_actrels, lnp, rcp)) { 952 /* LINTED */ 953 for (arsp = (Rel_desc *)(rcp + 1); 954 arsp < rcp->rc_free; arsp++) { 955 uchar_t *addr; 956 Xword value; 957 Sym_desc *sdp; 958 const char *ifl_name; 959 Xword refaddr; 960 961 /* 962 * If the section this relocation is against has been 963 * discarded (-zignore), then discard (skip) the 964 * relocation itself. 965 */ 966 if ((arsp->rel_isdesc->is_flags & FLG_IS_DISCARD) && 967 ((arsp->rel_flags & 968 (FLG_REL_GOT | FLG_REL_BSS | 969 FLG_REL_PLT | FLG_REL_NOINFO)) == 0)) { 970 DBG_CALL(Dbg_reloc_discard(ofl->ofl_lml, 971 M_MACH, arsp)); 972 continue; 973 } 974 975 /* 976 * Perform any required TLS fixups. 977 */ 978 if (arsp->rel_flags & FLG_REL_TLSFIX) { 979 Fixupret ret; 980 981 if ((ret = tls_fixups(ofl, arsp)) == FIX_ERROR) 982 return (S_ERROR); 983 if (ret == FIX_DONE) 984 continue; 985 } 986 987 /* 988 * Perform any required GOTOP fixups. 989 */ 990 if (arsp->rel_flags & FLG_REL_GOTFIX) { 991 Fixupret ret; 992 993 if ((ret = 994 gotop_fixups(ofl, arsp)) == FIX_ERROR) 995 return (S_ERROR); 996 if (ret == FIX_DONE) 997 continue; 998 } 999 1000 /* 1001 * If this is a relocation against the move table, or 1002 * expanded move table, adjust the relocation entries. 1003 */ 1004 if (arsp->rel_move) 1005 ld_adj_movereloc(ofl, arsp); 1006 1007 sdp = arsp->rel_sym; 1008 refaddr = arsp->rel_roffset + 1009 (Off)_elf_getxoff(arsp->rel_isdesc->is_indata); 1010 1011 if ((arsp->rel_flags & FLG_REL_CLVAL) || 1012 (arsp->rel_flags & FLG_REL_GOTCL)) 1013 value = 0; 1014 else if (ELF_ST_TYPE(sdp->sd_sym->st_info) == 1015 STT_SECTION) { 1016 Sym_desc *sym; 1017 1018 /* 1019 * The value for a symbol pointing to a SECTION 1020 * is based off of that sections position. 1021 */ 1022 if ((sdp->sd_isc->is_flags & FLG_IS_RELUPD) && 1023 (sym = ld_am_I_partial(arsp, 1024 arsp->rel_roffset))) { 1025 /* 1026 * If the symbol is moved, 1027 * adjust the value 1028 */ 1029 value = _elf_getxoff( 1030 sym->sd_isc->is_indata); 1031 if (sym->sd_isc->is_shdr->sh_flags & 1032 SHF_ALLOC) 1033 value += sym->sd_isc-> 1034 is_osdesc->os_shdr->sh_addr; 1035 } else { 1036 value = _elf_getxoff( 1037 sdp->sd_isc->is_indata); 1038 if (sdp->sd_isc->is_shdr->sh_flags & 1039 SHF_ALLOC) 1040 value += sdp->sd_isc-> 1041 is_osdesc->os_shdr->sh_addr; 1042 } 1043 1044 if (sdp->sd_isc->is_shdr->sh_flags & SHF_TLS) 1045 value -= ofl->ofl_tlsphdr->p_vaddr; 1046 } else { 1047 /* 1048 * else the value is the symbols value 1049 */ 1050 value = sdp->sd_sym->st_value; 1051 } 1052 1053 /* 1054 * Relocation against the GLOBAL_OFFSET_TABLE. 1055 */ 1056 if (arsp->rel_flags & FLG_REL_GOT) 1057 arsp->rel_osdesc = ofl->ofl_osgot; 1058 1059 /* 1060 * If loadable and not producing a relocatable object 1061 * add the sections virtual address to the reference 1062 * address. 1063 */ 1064 if ((arsp->rel_flags & FLG_REL_LOAD) && 1065 ((flags & FLG_OF_RELOBJ) == 0)) 1066 refaddr += arsp->rel_isdesc->is_osdesc-> 1067 os_shdr->sh_addr; 1068 1069 /* 1070 * If this entry has a PLT assigned to it, it's 1071 * value is actually the address of the PLT (and 1072 * not the address of the function). 1073 */ 1074 if (IS_PLT(arsp->rel_rtype)) { 1075 if (sdp->sd_aux && sdp->sd_aux->sa_PLTndx) 1076 value = ld_calc_plt_addr(sdp, ofl); 1077 } 1078 1079 /* 1080 * Add relocations addend to value. Add extra 1081 * relocation addend if needed. 1082 */ 1083 value += arsp->rel_raddend; 1084 if (IS_EXTOFFSET(arsp->rel_rtype)) 1085 value += arsp->rel_typedata; 1086 1087 /* 1088 * Determine whether the value needs further adjustment. 1089 * Filter through the attributes of the relocation to 1090 * determine what adjustment is required. Note, many 1091 * of the following cases are only applicable when a 1092 * .got is present. As a .got is not generated when a 1093 * relocatable object is being built, any adjustments 1094 * that require a .got need to be skipped. 1095 */ 1096 if ((arsp->rel_flags & FLG_REL_GOT) && 1097 ((flags & FLG_OF_RELOBJ) == 0)) { 1098 Xword R1addr; 1099 uintptr_t R2addr; 1100 Sword gotndx; 1101 Gotndx *gnp; 1102 Gotref gref; 1103 1104 /* 1105 * Clear the GOT table entry, on SPARC we clear 1106 * the entry and the 'value' if needed is stored 1107 * in an output relocations addend. 1108 * 1109 * Calculate offset into GOT at which to apply 1110 * the relocation. 1111 */ 1112 if (arsp->rel_flags & FLG_REL_DTLS) 1113 gref = GOT_REF_TLSGD; 1114 else if (arsp->rel_flags & FLG_REL_MTLS) 1115 gref = GOT_REF_TLSLD; 1116 else if (arsp->rel_flags & FLG_REL_STLS) 1117 gref = GOT_REF_TLSIE; 1118 else 1119 gref = GOT_REF_GENERIC; 1120 1121 gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), gref, 1122 ofl, arsp); 1123 assert(gnp); 1124 1125 if (arsp->rel_rtype == M_R_DTPOFF) 1126 gotndx = gnp->gn_gotndx + 1; 1127 else 1128 gotndx = gnp->gn_gotndx; 1129 1130 /* LINTED */ 1131 R1addr = (Xword)((-neggotoffset * 1132 M_GOT_ENTSIZE) + (gotndx * M_GOT_ENTSIZE)); 1133 1134 /* 1135 * Add the GOTs data's offset. 1136 */ 1137 R2addr = R1addr + (uintptr_t) 1138 arsp->rel_osdesc->os_outdata->d_buf; 1139 1140 DBG_CALL(Dbg_reloc_doact(ofl->ofl_lml, 1141 ELF_DBG_LD, M_MACH, SHT_RELA, 1142 arsp->rel_rtype, R1addr, value, 1143 arsp->rel_sname, arsp->rel_osdesc)); 1144 1145 /* 1146 * And do it. 1147 */ 1148 *(Xword *)R2addr = value; 1149 continue; 1150 1151 } else if (IS_GOT_BASED(arsp->rel_rtype) && 1152 ((flags & FLG_OF_RELOBJ) == 0)) { 1153 value -= (ofl->ofl_osgot->os_shdr->sh_addr + 1154 (-neggotoffset * M_GOT_ENTSIZE)); 1155 1156 } else if (IS_PC_RELATIVE(arsp->rel_rtype)) { 1157 value -= refaddr; 1158 1159 } else if (IS_TLS_INS(arsp->rel_rtype) && 1160 IS_GOT_RELATIVE(arsp->rel_rtype) && 1161 ((flags & FLG_OF_RELOBJ) == 0)) { 1162 Gotndx *gnp; 1163 Gotref gref; 1164 1165 if (arsp->rel_flags & FLG_REL_STLS) 1166 gref = GOT_REF_TLSIE; 1167 else if (arsp->rel_flags & FLG_REL_DTLS) 1168 gref = GOT_REF_TLSGD; 1169 else if (arsp->rel_flags & FLG_REL_MTLS) 1170 gref = GOT_REF_TLSLD; 1171 1172 gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), gref, 1173 ofl, arsp); 1174 assert(gnp); 1175 1176 value = gnp->gn_gotndx * M_GOT_ENTSIZE; 1177 1178 } else if (IS_GOT_RELATIVE(arsp->rel_rtype) && 1179 ((flags & FLG_OF_RELOBJ) == 0)) { 1180 Gotndx *gnp; 1181 1182 gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), 1183 GOT_REF_GENERIC, ofl, arsp); 1184 assert(gnp); 1185 1186 value = gnp->gn_gotndx * M_GOT_ENTSIZE; 1187 1188 } else if ((arsp->rel_flags & FLG_REL_STLS) && 1189 ((flags & FLG_OF_RELOBJ) == 0)) { 1190 Xword tlsstatsize; 1191 1192 /* 1193 * This is the LE TLS 1194 * reference model. Static offset 1195 * is hard-coded, and negated so that 1196 * it can be added to the thread pointer (%g7) 1197 */ 1198 tlsstatsize = S_ROUND(ofl-> 1199 ofl_tlsphdr->p_memsz, M_TLSSTATALIGN); 1200 value = -(tlsstatsize - value); 1201 } 1202 1203 if (arsp->rel_isdesc->is_file) 1204 ifl_name = arsp->rel_isdesc->is_file->ifl_name; 1205 else 1206 ifl_name = MSG_INTL(MSG_STR_NULL); 1207 1208 /* 1209 * Make sure we have data to relocate. Compiler and 1210 * assembler developers have been known to generate 1211 * relocations against invalid sections (normally .bss), 1212 * so for their benefit give them sufficient information 1213 * to help analyze the problem. End users should never 1214 * see this. 1215 */ 1216 if (arsp->rel_isdesc->is_indata->d_buf == 0) { 1217 eprintf(ofl->ofl_lml, ERR_FATAL, 1218 MSG_INTL(MSG_REL_EMPTYSEC), 1219 conv_reloc_SPARC_type(arsp->rel_rtype), 1220 ifl_name, demangle(arsp->rel_sname), 1221 arsp->rel_isdesc->is_name); 1222 return (S_ERROR); 1223 } 1224 1225 /* 1226 * Get the address of the data item we need to modify. 1227 */ 1228 addr = (uchar_t *)((uintptr_t)arsp->rel_roffset + 1229 (uintptr_t)_elf_getxoff(arsp->rel_isdesc-> 1230 is_indata)); 1231 1232 /*LINTED*/ 1233 DBG_CALL(Dbg_reloc_doact(ofl->ofl_lml, ELF_DBG_LD, 1234 M_MACH, SHT_RELA, arsp->rel_rtype, EC_NATPTR(addr), 1235 value, arsp->rel_sname, arsp->rel_osdesc)); 1236 addr += (uintptr_t)arsp->rel_osdesc->os_outdata->d_buf; 1237 1238 if ((((uintptr_t)addr - (uintptr_t)ofl->ofl_nehdr) > 1239 ofl->ofl_size) || (arsp->rel_roffset > 1240 arsp->rel_osdesc->os_shdr->sh_size)) { 1241 int class; 1242 1243 if (((uintptr_t)addr - 1244 (uintptr_t)ofl->ofl_nehdr) > ofl->ofl_size) 1245 class = ERR_FATAL; 1246 else 1247 class = ERR_WARNING; 1248 1249 eprintf(ofl->ofl_lml, class, 1250 MSG_INTL(MSG_REL_INVALOFFSET), 1251 conv_reloc_SPARC_type(arsp->rel_rtype), 1252 ifl_name, arsp->rel_isdesc->is_name, 1253 demangle(arsp->rel_sname), 1254 EC_ADDR((uintptr_t)addr - 1255 (uintptr_t)ofl->ofl_nehdr)); 1256 1257 if (class == ERR_FATAL) { 1258 return_code = S_ERROR; 1259 continue; 1260 } 1261 } 1262 1263 /* 1264 * If '-z noreloc' is specified - skip the do_reloc 1265 * stage. 1266 */ 1267 if ((flags & FLG_OF_RELOBJ) || 1268 !(dtflags1 & DF_1_NORELOC)) { 1269 if (do_reloc((uchar_t)arsp->rel_rtype, addr, 1270 &value, arsp->rel_sname, ifl_name, 1271 ofl->ofl_lml) == 0) 1272 return_code = S_ERROR; 1273 } 1274 } 1275 } 1276 return (return_code); 1277 } 1278 1279 uintptr_t 1280 ld_add_outrel(Word flags, Rel_desc *rsp, Ofl_desc *ofl) 1281 { 1282 Rel_desc *orsp; 1283 Rel_cache *rcp; 1284 Sym_desc *sdp = rsp->rel_sym; 1285 1286 /* 1287 * Static executables *do not* want any relocations against them. 1288 * Since our engine still creates relocations against a WEAK UNDEFINED 1289 * symbol in a static executable, it's best to disable them here 1290 * instead of through out the relocation code. 1291 */ 1292 if ((ofl->ofl_flags & (FLG_OF_STATIC | FLG_OF_EXEC)) == 1293 (FLG_OF_STATIC | FLG_OF_EXEC)) 1294 return (1); 1295 1296 /* 1297 * Certain relocations do not make sense in a 64bit shared object, 1298 * if building a shared object do a sanity check on the output 1299 * relocations being created. 1300 */ 1301 if (ofl->ofl_flags & FLG_OF_SHAROBJ) { 1302 Word rtype = rsp->rel_rtype; 1303 /* 1304 * Because the R_SPARC_HIPLT22 & R_SPARC_LOPLT10 relocations 1305 * are not relative they make no sense to create in a shared 1306 * object - so emit the proper error message if that occurs. 1307 */ 1308 if ((rtype == R_SPARC_HIPLT22) || 1309 (rtype == R_SPARC_LOPLT10)) { 1310 eprintf(ofl->ofl_lml, ERR_FATAL, 1311 MSG_INTL(MSG_REL_UNRELREL), 1312 conv_reloc_SPARC_type(rsp->rel_rtype), 1313 rsp->rel_isdesc->is_file->ifl_name, 1314 demangle(rsp->rel_sname)); 1315 return (S_ERROR); 1316 } 1317 #if defined(_ELF64) 1318 /* 1319 * Each of the following relocations requires that the 1320 * object being built be loaded in either the upper 32 or 1321 * 44 bit range of memory. Since shared libraries traditionally 1322 * are loaded in the lower range of memory - this isn't going 1323 * to work. 1324 */ 1325 if ((rtype == R_SPARC_H44) || (rtype == R_SPARC_M44) || 1326 (rtype == R_SPARC_L44)) { 1327 eprintf(ofl->ofl_lml, ERR_FATAL, 1328 MSG_INTL(MSG_REL_SHOBJABS44), 1329 conv_reloc_SPARC_type(rsp->rel_rtype), 1330 rsp->rel_isdesc->is_file->ifl_name, 1331 demangle(rsp->rel_sname)); 1332 return (S_ERROR); 1333 } 1334 #endif 1335 } 1336 1337 /* 1338 * If no relocation cache structures are available allocate 1339 * a new one and link it into the cache list. 1340 */ 1341 if ((ofl->ofl_outrels.tail == 0) || 1342 ((rcp = (Rel_cache *)ofl->ofl_outrels.tail->data) == 0) || 1343 ((orsp = rcp->rc_free) == rcp->rc_end)) { 1344 static size_t nextsize = 0; 1345 size_t size; 1346 1347 /* 1348 * Output relocation numbers can vary considerably between 1349 * building executables or shared objects (pic vs. non-pic), 1350 * etc. But, they typically aren't very large, so for these 1351 * objects use a standard bucket size. For building relocatable 1352 * objects, typically there will be an output relocation for 1353 * every input relocation. 1354 */ 1355 if (nextsize == 0) { 1356 if (ofl->ofl_flags & FLG_OF_RELOBJ) { 1357 if ((size = ofl->ofl_relocincnt) == 0) 1358 size = REL_LOIDESCNO; 1359 if (size > REL_HOIDESCNO) 1360 nextsize = REL_HOIDESCNO; 1361 else 1362 nextsize = REL_LOIDESCNO; 1363 } else 1364 nextsize = size = REL_HOIDESCNO; 1365 } else 1366 size = nextsize; 1367 1368 size = size * sizeof (Rel_desc); 1369 1370 if (((rcp = libld_malloc(sizeof (Rel_cache) + size)) == 0) || 1371 (list_appendc(&ofl->ofl_outrels, rcp) == 0)) 1372 return (S_ERROR); 1373 1374 /* LINTED */ 1375 rcp->rc_free = orsp = (Rel_desc *)(rcp + 1); 1376 /* LINTED */ 1377 rcp->rc_end = (Rel_desc *)((char *)rcp->rc_free + size); 1378 } 1379 1380 /* 1381 * If we are adding a output relocation against a section 1382 * symbol (non-RELATIVE) then mark that section. These sections 1383 * will be added to the .dynsym symbol table. 1384 */ 1385 if (sdp && (rsp->rel_rtype != M_R_RELATIVE) && 1386 ((flags & FLG_REL_SCNNDX) || 1387 (ELF_ST_TYPE(sdp->sd_sym->st_info) == STT_SECTION))) { 1388 1389 /* 1390 * If this is a COMMON symbol - no output section 1391 * exists yet - (it's created as part of sym_validate()). 1392 * So - we mark here that when it's created it should 1393 * be tagged with the FLG_OS_OUTREL flag. 1394 */ 1395 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 1396 (sdp->sd_sym->st_shndx == SHN_COMMON)) { 1397 if (ELF_ST_TYPE(sdp->sd_sym->st_info) != STT_TLS) 1398 ofl->ofl_flags1 |= FLG_OF1_BSSOREL; 1399 else 1400 ofl->ofl_flags1 |= FLG_OF1_TLSOREL; 1401 } else { 1402 Os_desc *osp = sdp->sd_isc->is_osdesc; 1403 1404 if ((osp->os_flags & FLG_OS_OUTREL) == 0) { 1405 ofl->ofl_dynshdrcnt++; 1406 osp->os_flags |= FLG_OS_OUTREL; 1407 } 1408 } 1409 } 1410 1411 *orsp = *rsp; 1412 orsp->rel_flags |= flags; 1413 1414 rcp->rc_free++; 1415 ofl->ofl_outrelscnt++; 1416 1417 if (flags & FLG_REL_GOT) 1418 ofl->ofl_relocgotsz += (Xword)sizeof (Rela); 1419 else if (flags & FLG_REL_PLT) 1420 ofl->ofl_relocpltsz += (Xword)sizeof (Rela); 1421 else if (flags & FLG_REL_BSS) 1422 ofl->ofl_relocbsssz += (Xword)sizeof (Rela); 1423 else if (flags & FLG_REL_NOINFO) 1424 ofl->ofl_relocrelsz += (Xword)sizeof (Rela); 1425 else 1426 orsp->rel_osdesc->os_szoutrels += (Xword)sizeof (Rela); 1427 1428 if (orsp->rel_rtype == M_R_RELATIVE) 1429 ofl->ofl_relocrelcnt++; 1430 1431 #if defined(_ELF64) 1432 /* 1433 * When building a 64-bit object any R_SPARC_WDISP30 relocation is given 1434 * a plt padding entry, unless we're building a relocatable object 1435 * (ld -r) or -b is in effect. 1436 */ 1437 if ((orsp->rel_rtype == R_SPARC_WDISP30) && 1438 ((ofl->ofl_flags & (FLG_OF_BFLAG | FLG_OF_RELOBJ)) == 0) && 1439 ((orsp->rel_sym->sd_flags & FLG_SY_PLTPAD) == 0)) { 1440 ofl->ofl_pltpad++; 1441 orsp->rel_sym->sd_flags |= FLG_SY_PLTPAD; 1442 } 1443 #endif 1444 /* 1445 * We don't perform sorting on PLT relocations because 1446 * they have already been assigned a PLT index and if we 1447 * were to sort them we would have to re-assign the plt indexes. 1448 */ 1449 if (!(flags & FLG_REL_PLT)) 1450 ofl->ofl_reloccnt++; 1451 1452 /* 1453 * Insure a GLOBAL_OFFSET_TABLE is generated if required. 1454 */ 1455 if (IS_GOT_REQUIRED(orsp->rel_rtype)) 1456 ofl->ofl_flags |= FLG_OF_BLDGOT; 1457 1458 /* 1459 * Identify and possibly warn of a displacement relocation. 1460 */ 1461 if (orsp->rel_flags & FLG_REL_DISP) { 1462 ofl->ofl_dtflags_1 |= DF_1_DISPRELPND; 1463 1464 if (ofl->ofl_flags & FLG_OF_VERBOSE) 1465 ld_disp_errmsg(MSG_INTL(MSG_REL_DISPREL4), orsp, ofl); 1466 } 1467 DBG_CALL(Dbg_reloc_ors_entry(ofl->ofl_lml, ELF_DBG_LD, SHT_RELA, 1468 M_MACH, orsp)); 1469 return (1); 1470 } 1471 1472 /* 1473 * Process relocation against a register symbol. Note, of -z muldefs is in 1474 * effect there may have been multiple register definitions, which would have 1475 * been processed as non-fatal, with the first definition winning. But, we 1476 * will also process multiple relocations for these multiple definitions. In 1477 * this case we must only preserve the relocation for the definition that was 1478 * kept. The sad part is that register relocations don't typically specify 1479 * the register symbol with which they are associated, so we might have to 1480 * search the input files global symbols to determine if this relocation is 1481 * appropriate. 1482 */ 1483 uintptr_t 1484 ld_reloc_register(Rel_desc * rsp, Is_desc * isp, Ofl_desc * ofl) 1485 { 1486 if (ofl->ofl_flags & FLG_OF_MULDEFS) { 1487 Ifl_desc * ifl = isp->is_file; 1488 Sym_desc * sdp = rsp->rel_sym; 1489 1490 if (sdp == 0) { 1491 Xword offset = rsp->rel_roffset; 1492 Word ndx; 1493 1494 for (ndx = ifl->ifl_locscnt; 1495 ndx < ifl->ifl_symscnt; ndx++) { 1496 if (((sdp = ifl->ifl_oldndx[ndx]) != 0) && 1497 (sdp->sd_flags & FLG_SY_REGSYM) && 1498 (sdp->sd_sym->st_value == offset)) 1499 break; 1500 } 1501 } 1502 if (sdp && (sdp->sd_file != ifl)) 1503 return (1); 1504 } 1505 return (ld_add_outrel((rsp->rel_flags | FLG_REL_REG), rsp, ofl)); 1506 } 1507 1508 /* 1509 * process relocation for a LOCAL symbol 1510 */ 1511 uintptr_t 1512 ld_reloc_local(Rel_desc * rsp, Ofl_desc * ofl) 1513 { 1514 Word flags = ofl->ofl_flags; 1515 Sym_desc *sdp = rsp->rel_sym; 1516 Word shndx = sdp->sd_sym->st_shndx; 1517 1518 /* 1519 * if ((shared object) and (not pc relative relocation) and 1520 * (not against ABS symbol)) 1521 * then 1522 * if (rtype != R_SPARC_32) 1523 * then 1524 * build relocation against section 1525 * else 1526 * build R_SPARC_RELATIVE 1527 * fi 1528 * fi 1529 */ 1530 if ((flags & FLG_OF_SHAROBJ) && (rsp->rel_flags & FLG_REL_LOAD) && 1531 !(IS_PC_RELATIVE(rsp->rel_rtype)) && 1532 !(IS_GOT_BASED(rsp->rel_rtype)) && 1533 !(rsp->rel_isdesc != NULL && 1534 (rsp->rel_isdesc->is_shdr->sh_type == SHT_SUNW_dof)) && 1535 (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) || 1536 (shndx != SHN_ABS) || (sdp->sd_aux && sdp->sd_aux->sa_symspec))) { 1537 Word ortype = rsp->rel_rtype; 1538 1539 if ((rsp->rel_rtype != R_SPARC_32) && 1540 (rsp->rel_rtype != R_SPARC_PLT32) && 1541 (rsp->rel_rtype != R_SPARC_64)) 1542 return (ld_add_outrel((FLG_REL_SCNNDX | FLG_REL_ADVAL), 1543 rsp, ofl)); 1544 1545 rsp->rel_rtype = R_SPARC_RELATIVE; 1546 if (ld_add_outrel(FLG_REL_ADVAL, rsp, ofl) == S_ERROR) 1547 return (S_ERROR); 1548 rsp->rel_rtype = ortype; 1549 return (1); 1550 } 1551 1552 /* 1553 * If the relocation is against a 'non-allocatable' section 1554 * and we can not resolve it now - then give a warning 1555 * message. 1556 * 1557 * We can not resolve the symbol if either: 1558 * a) it's undefined 1559 * b) it's defined in a shared library and a 1560 * COPY relocation hasn't moved it to the executable 1561 * 1562 * Note: because we process all of the relocations against the 1563 * text segment before any others - we know whether 1564 * or not a copy relocation will be generated before 1565 * we get here (see reloc_init()->reloc_segments()). 1566 */ 1567 if (!(rsp->rel_flags & FLG_REL_LOAD) && 1568 ((shndx == SHN_UNDEF) || 1569 ((sdp->sd_ref == REF_DYN_NEED) && 1570 ((sdp->sd_flags & FLG_SY_MVTOCOMM) == 0)))) { 1571 /* 1572 * If the relocation is against a SHT_SUNW_ANNOTATE 1573 * section - then silently ignore that the relocation 1574 * can not be resolved. 1575 */ 1576 if (rsp->rel_osdesc && 1577 (rsp->rel_osdesc->os_shdr->sh_type == SHT_SUNW_ANNOTATE)) 1578 return (0); 1579 (void) eprintf(ofl->ofl_lml, ERR_WARNING, 1580 MSG_INTL(MSG_REL_EXTERNSYM), 1581 conv_reloc_SPARC_type(rsp->rel_rtype), 1582 rsp->rel_isdesc->is_file->ifl_name, 1583 demangle(rsp->rel_sname), rsp->rel_osdesc->os_name); 1584 return (1); 1585 } 1586 1587 /* 1588 * Perform relocation. 1589 */ 1590 return (ld_add_actrel(NULL, rsp, ofl)); 1591 } 1592 1593 uintptr_t 1594 ld_reloc_GOTOP(Boolean local, Rel_desc * rsp, Ofl_desc * ofl) 1595 { 1596 Word rtype = rsp->rel_rtype; 1597 1598 if (!local) { 1599 /* 1600 * When binding to a external symbol, no fixups are required 1601 * and the GOTDATA_OP relocation can be ignored. 1602 */ 1603 if (rtype == R_SPARC_GOTDATA_OP) 1604 return (1); 1605 return (ld_reloc_GOT_relative(local, rsp, ofl)); 1606 } 1607 1608 /* 1609 * When binding to a local symbol the relocations can be transitioned: 1610 * 1611 * R_*_GOTDATA_OP_HIX22 -> R_*_GOTDATA_HIX22 1612 * R_*_GOTDATA_OP_LOX10 -> R_*_GOTDATA_LOX10 1613 * R_*_GOTDATA_OP -> instruction fixup 1614 */ 1615 return (ld_add_actrel(FLG_REL_GOTFIX, rsp, ofl)); 1616 } 1617 1618 uintptr_t 1619 ld_reloc_TLS(Boolean local, Rel_desc * rsp, Ofl_desc * ofl) 1620 { 1621 Word rtype = rsp->rel_rtype; 1622 Sym_desc *sdp = rsp->rel_sym; 1623 Word flags = ofl->ofl_flags; 1624 Word rflags; 1625 Gotndx *gnp; 1626 1627 /* 1628 * all TLS relocations are illegal in a static executable. 1629 */ 1630 if ((ofl->ofl_flags & (FLG_OF_STATIC | FLG_OF_EXEC)) == 1631 (FLG_OF_STATIC | FLG_OF_EXEC)) { 1632 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_REL_TLSSTAT), 1633 conv_reloc_SPARC_type(rsp->rel_rtype), 1634 rsp->rel_isdesc->is_file->ifl_name, 1635 demangle(rsp->rel_sname)); 1636 return (S_ERROR); 1637 } 1638 1639 /* 1640 * Any TLS relocation must be against a STT_TLS symbol, all others 1641 * are illegal. 1642 */ 1643 if (ELF_ST_TYPE(sdp->sd_sym->st_info) != STT_TLS) { 1644 Ifl_desc *ifl = rsp->rel_isdesc->is_file; 1645 1646 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_REL_TLSBADSYM), 1647 conv_reloc_SPARC_type(rsp->rel_rtype), 1648 ifl->ifl_name, demangle(rsp->rel_sname), 1649 conv_sym_info_type(ifl->ifl_ehdr->e_machine, 1650 ELF_ST_TYPE(sdp->sd_sym->st_info))); 1651 return (S_ERROR); 1652 } 1653 1654 /* 1655 * We're a executable - use either the IE or LE 1656 * access model. 1657 */ 1658 if (flags & FLG_OF_EXEC) { 1659 /* 1660 * If we are using either IE or LE reference 1661 * model set the DF_STATIC_TLS flag. 1662 */ 1663 ofl->ofl_dtflags |= DF_STATIC_TLS; 1664 1665 if (!local) { 1666 /* 1667 * IE access model 1668 */ 1669 /* 1670 * When building a executable - these relocations 1671 * can be ignored. 1672 */ 1673 if ((rtype == R_SPARC_TLS_IE_LD) || 1674 (rtype == R_SPARC_TLS_IE_LDX) || 1675 (rtype == R_SPARC_TLS_IE_ADD)) 1676 return (1); 1677 1678 /* 1679 * It's not possible for LD or LE reference 1680 * models to reference a symbol external to 1681 * the current object. 1682 */ 1683 if (IS_TLS_LD(rtype) || IS_TLS_LE(rtype)) { 1684 eprintf(ofl->ofl_lml, ERR_FATAL, 1685 MSG_INTL(MSG_REL_TLSBND), 1686 conv_reloc_SPARC_type(rsp->rel_rtype), 1687 rsp->rel_isdesc->is_file->ifl_name, 1688 demangle(rsp->rel_sname), 1689 sdp->sd_file->ifl_name); 1690 return (S_ERROR); 1691 } 1692 1693 /* 1694 * Assign a GOT entry for static TLS references 1695 */ 1696 if (((rtype == R_SPARC_TLS_GD_HI22) || 1697 (rtype == R_SPARC_TLS_GD_LO10) || 1698 (rtype == R_SPARC_TLS_IE_HI22) || 1699 (rtype == R_SPARC_TLS_IE_LO10)) && 1700 ((gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), 1701 GOT_REF_TLSIE, ofl, rsp)) == 0)) { 1702 if (ld_assign_gotndx(&(sdp->sd_GOTndxs), gnp, 1703 GOT_REF_TLSIE, ofl, rsp, sdp) == S_ERROR) 1704 return (S_ERROR); 1705 rsp->rel_rtype = M_R_TPOFF; 1706 if (ld_add_outrel((FLG_REL_GOT | FLG_REL_STLS), 1707 rsp, ofl) == S_ERROR) 1708 return (S_ERROR); 1709 rsp->rel_rtype = rtype; 1710 } 1711 1712 if (IS_TLS_IE(rtype)) 1713 return (ld_add_actrel(FLG_REL_STLS, rsp, ofl)); 1714 1715 /* 1716 * If (GD) reference models - fixups 1717 * are required. 1718 */ 1719 return (ld_add_actrel((FLG_REL_TLSFIX | FLG_REL_STLS), 1720 rsp, ofl)); 1721 } 1722 /* 1723 * LE access model 1724 */ 1725 if (IS_TLS_LE(rtype)) 1726 return (ld_add_actrel(FLG_REL_STLS, rsp, ofl)); 1727 1728 /* 1729 * When building a executable - these relocations 1730 * can be ignored. 1731 */ 1732 if (rtype == R_SPARC_TLS_IE_ADD) 1733 return (1); 1734 1735 return (ld_add_actrel((FLG_REL_TLSFIX | FLG_REL_STLS), 1736 rsp, ofl)); 1737 } 1738 1739 /* 1740 * Building a shared object 1741 */ 1742 1743 /* 1744 * Building a shared object - only GD & LD access models 1745 * will work here. 1746 */ 1747 if (IS_TLS_IE(rtype) || IS_TLS_LE(rtype)) { 1748 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_REL_TLSIE), 1749 conv_reloc_SPARC_type(rsp->rel_rtype), 1750 rsp->rel_isdesc->is_file->ifl_name, 1751 demangle(rsp->rel_sname)); 1752 return (S_ERROR); 1753 } 1754 1755 /* 1756 * LD access mode can only bind to local symbols. 1757 */ 1758 if (!local && IS_TLS_LD(rtype)) { 1759 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_REL_TLSBND), 1760 conv_reloc_SPARC_type(rsp->rel_rtype), 1761 rsp->rel_isdesc->is_file->ifl_name, 1762 demangle(rsp->rel_sname), 1763 sdp->sd_file->ifl_name); 1764 return (S_ERROR); 1765 } 1766 1767 /* 1768 * For dynamic TLS references - ADD relocations 1769 * are ignored. 1770 */ 1771 if ((rtype == R_SPARC_TLS_GD_ADD) || (rtype == R_SPARC_TLS_LDM_ADD) || 1772 (rtype == R_SPARC_TLS_LDO_ADD)) 1773 return (1); 1774 1775 /* 1776 * Assign a GOT entry for a dynamic TLS reference. 1777 */ 1778 if (((rtype == R_SPARC_TLS_LDM_HI22) || 1779 (rtype == R_SPARC_TLS_LDM_LO10)) && 1780 ((gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), 1781 GOT_REF_TLSLD, ofl, rsp)) == 0)) { 1782 if (ld_assign_gotndx(&(sdp->sd_GOTndxs), gnp, GOT_REF_TLSLD, 1783 ofl, rsp, sdp) == S_ERROR) 1784 return (S_ERROR); 1785 rsp->rel_rtype = M_R_DTPMOD; 1786 rflags = FLG_REL_GOT | FLG_REL_MTLS; 1787 if (local) 1788 rflags |= FLG_REL_SCNNDX; 1789 1790 if (ld_add_outrel(rflags, rsp, ofl) == S_ERROR) 1791 return (S_ERROR); 1792 1793 rsp->rel_rtype = rtype; 1794 1795 } else if (((rtype == R_SPARC_TLS_GD_HI22) || (rtype == 1796 R_SPARC_TLS_GD_LO10)) && ((gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), 1797 GOT_REF_TLSGD, ofl, rsp)) == 0)) { 1798 if (ld_assign_gotndx(&(sdp->sd_GOTndxs), gnp, GOT_REF_TLSGD, 1799 ofl, rsp, sdp) == S_ERROR) 1800 return (S_ERROR); 1801 rsp->rel_rtype = M_R_DTPMOD; 1802 rflags = FLG_REL_GOT | FLG_REL_DTLS; 1803 if (local) 1804 rflags |= FLG_REL_SCNNDX; 1805 1806 if (ld_add_outrel(rflags, rsp, ofl) == S_ERROR) 1807 return (S_ERROR); 1808 1809 if (local == TRUE) { 1810 rsp->rel_rtype = M_R_DTPOFF; 1811 if (ld_add_actrel((FLG_REL_GOT | FLG_REL_DTLS), rsp, 1812 ofl) == S_ERROR) 1813 return (S_ERROR); 1814 } else { 1815 rsp->rel_rtype = M_R_DTPOFF; 1816 if (ld_add_outrel((FLG_REL_GOT | FLG_REL_DTLS), rsp, 1817 ofl) == S_ERROR) 1818 return (S_ERROR); 1819 } 1820 rsp->rel_rtype = rtype; 1821 } 1822 /* 1823 * For GD/LD TLS reference - TLS_{GD,LD}_CALL, this will eventually 1824 * cause a call to __tls_get_addr(). Let's convert this 1825 * relocation to that symbol now, and prepare for the PLT magic. 1826 */ 1827 if ((rtype == R_SPARC_TLS_GD_CALL) || (rtype == R_SPARC_TLS_LDM_CALL)) { 1828 Sym_desc * tlsgetsym; 1829 1830 if ((tlsgetsym = ld_sym_add_u(MSG_ORIG(MSG_SYM_TLSGETADDR_U), 1831 ofl)) == (Sym_desc *)S_ERROR) 1832 return (S_ERROR); 1833 rsp->rel_sym = tlsgetsym; 1834 rsp->rel_sname = tlsgetsym->sd_name; 1835 rsp->rel_rtype = R_SPARC_WPLT30; 1836 if (ld_reloc_plt(rsp, ofl) == S_ERROR) 1837 return (S_ERROR); 1838 rsp->rel_sym = sdp; 1839 rsp->rel_sname = sdp->sd_name; 1840 rsp->rel_rtype = rtype; 1841 return (1); 1842 } 1843 1844 if (IS_TLS_LD(rtype)) 1845 return (ld_add_actrel(FLG_REL_MTLS, rsp, ofl)); 1846 1847 return (ld_add_actrel(FLG_REL_DTLS, rsp, ofl)); 1848 } 1849 1850 /* 1851 * ld_allocate_got: if a GOT is to be made, after the section is built this 1852 * function is called to allocate all the GOT slots. The allocation is 1853 * deferred until after all GOTs have been counted and sorted according 1854 * to their size, for only then will we know how to allocate them on 1855 * a processor like SPARC which has different models for addressing the 1856 * GOT. SPARC has two: small and large, small uses a signed 13-bit offset 1857 * into the GOT, whereas large uses an unsigned 32-bit offset. 1858 */ 1859 static Sword small_index; /* starting index for small GOT entries */ 1860 static Sword large_index; /* starting index for large GOT entries */ 1861 1862 uintptr_t 1863 ld_assign_got(Ofl_desc *ofl, Sym_desc * sdp) 1864 { 1865 Listnode * lnp; 1866 Gotndx * gnp; 1867 1868 for (LIST_TRAVERSE(&sdp->sd_GOTndxs, lnp, gnp)) { 1869 uint_t gotents; 1870 Gotref gref; 1871 gref = gnp->gn_gotref; 1872 if ((gref == GOT_REF_TLSGD) || (gref == GOT_REF_TLSLD)) 1873 gotents = 2; 1874 else 1875 gotents = 1; 1876 1877 switch (gnp->gn_gotndx) { 1878 case M_GOT_SMALL: 1879 gnp->gn_gotndx = small_index; 1880 small_index += gotents; 1881 if (small_index == 0) 1882 small_index = M_GOT_XNumber; 1883 break; 1884 case M_GOT_LARGE: 1885 gnp->gn_gotndx = large_index; 1886 large_index += gotents; 1887 break; 1888 default: 1889 eprintf(ofl->ofl_lml, ERR_FATAL, 1890 MSG_INTL(MSG_REL_ASSIGNGOT), 1891 EC_XWORD(gnp->gn_gotndx), demangle(sdp->sd_name)); 1892 return (S_ERROR); 1893 } 1894 } 1895 return (1); 1896 } 1897 1898 /* 1899 * Search the GOT index list for a GOT entry with the proper addend. 1900 */ 1901 Gotndx * 1902 ld_find_gotndx(List * lst, Gotref gref, Ofl_desc * ofl, Rel_desc * rdesc) 1903 { 1904 Listnode * lnp; 1905 Gotndx * gnp; 1906 1907 if ((gref == GOT_REF_TLSLD) && ofl->ofl_tlsldgotndx) 1908 return (ofl->ofl_tlsldgotndx); 1909 1910 for (LIST_TRAVERSE(lst, lnp, gnp)) { 1911 if ((rdesc->rel_raddend == gnp->gn_addend) && 1912 (gref == gnp->gn_gotref)) 1913 return (gnp); 1914 } 1915 return ((Gotndx *)0); 1916 } 1917 1918 Xword 1919 ld_calc_got_offset(Rel_desc * rdesc, Ofl_desc * ofl) 1920 { 1921 Os_desc *osp = ofl->ofl_osgot; 1922 Sym_desc *sdp = rdesc->rel_sym; 1923 Xword gotndx; 1924 Gotref gref; 1925 Gotndx *gnp; 1926 1927 if (rdesc->rel_flags & FLG_REL_DTLS) 1928 gref = GOT_REF_TLSGD; 1929 else if (rdesc->rel_flags & FLG_REL_MTLS) 1930 gref = GOT_REF_TLSLD; 1931 else if (rdesc->rel_flags & FLG_REL_STLS) 1932 gref = GOT_REF_TLSIE; 1933 else 1934 gref = GOT_REF_GENERIC; 1935 1936 gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), gref, ofl, rdesc); 1937 assert(gnp); 1938 1939 gotndx = (Xword)gnp->gn_gotndx; 1940 1941 if ((rdesc->rel_flags & FLG_REL_DTLS) && 1942 (rdesc->rel_rtype == M_R_DTPOFF)) 1943 gotndx++; 1944 1945 return ((Xword)((osp->os_shdr->sh_addr) + (gotndx * M_GOT_ENTSIZE) + 1946 (-neggotoffset * M_GOT_ENTSIZE))); 1947 } 1948 1949 uintptr_t 1950 ld_assign_gotndx(List * lst, Gotndx * pgnp, Gotref gref, Ofl_desc * ofl, 1951 Rel_desc * rsp, Sym_desc * sdp) 1952 { 1953 Xword raddend; 1954 Gotndx * gnp, * _gnp; 1955 Listnode * lnp, * plnp; 1956 uint_t gotents; 1957 1958 raddend = rsp->rel_raddend; 1959 if (pgnp && (pgnp->gn_addend == raddend) && (pgnp->gn_gotref == gref)) { 1960 /* 1961 * If an entry for this addend already exists, determine if it 1962 * should be changed to a SMALL got. 1963 */ 1964 if ((pgnp->gn_gotndx != M_GOT_SMALL) && 1965 (rsp->rel_rtype == R_SPARC_GOT13)) { 1966 smlgotcnt++; 1967 pgnp->gn_gotndx = M_GOT_SMALL; 1968 sdp->sd_flags |= FLG_SY_SMGOT; 1969 } 1970 return (1); 1971 } 1972 1973 if ((gref == GOT_REF_TLSGD) || (gref == GOT_REF_TLSLD)) 1974 gotents = 2; 1975 else 1976 gotents = 1; 1977 1978 plnp = 0; 1979 for (LIST_TRAVERSE(lst, lnp, _gnp)) { 1980 if (_gnp->gn_addend > raddend) 1981 break; 1982 plnp = lnp; 1983 } 1984 1985 /* 1986 * Allocate a new entry. 1987 */ 1988 if ((gnp = libld_calloc(sizeof (Gotndx), 1)) == 0) 1989 return (S_ERROR); 1990 gnp->gn_addend = raddend; 1991 gnp->gn_gotref = gref; 1992 ofl->ofl_gotcnt += gotents; 1993 1994 if (rsp->rel_rtype == R_SPARC_GOT13) { 1995 gnp->gn_gotndx = M_GOT_SMALL; 1996 smlgotcnt++; 1997 sdp->sd_flags |= FLG_SY_SMGOT; 1998 } else 1999 gnp->gn_gotndx = M_GOT_LARGE; 2000 2001 if (gref == GOT_REF_TLSLD) { 2002 ofl->ofl_tlsldgotndx = gnp; 2003 return (1); 2004 } 2005 2006 if (plnp == 0) { 2007 /* 2008 * Insert at head of list 2009 */ 2010 if (list_prependc(lst, (void *)gnp) == 0) 2011 return (S_ERROR); 2012 } else if (_gnp->gn_addend > raddend) { 2013 /* 2014 * Insert in middle of lest 2015 */ 2016 if (list_insertc(lst, (void *)gnp, plnp) == 0) 2017 return (S_ERROR); 2018 } else { 2019 /* 2020 * Append to tail of list 2021 */ 2022 if (list_appendc(lst, (void *)gnp) == 0) 2023 return (S_ERROR); 2024 } 2025 return (1); 2026 } 2027 2028 void 2029 ld_assign_plt_ndx(Sym_desc * sdp, Ofl_desc *ofl) 2030 { 2031 sdp->sd_aux->sa_PLTndx = 1 + ofl->ofl_pltcnt++; 2032 } 2033 2034 2035 uintptr_t 2036 ld_allocate_got(Ofl_desc * ofl) 2037 { 2038 Sym_desc * sdp; 2039 Addr addr; 2040 2041 /* 2042 * Sanity check -- is this going to fit at all? 2043 */ 2044 if (smlgotcnt >= M_GOT_MAXSMALL) { 2045 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_REL_SMALLGOT), 2046 EC_WORD(smlgotcnt), M_GOT_MAXSMALL); 2047 return (S_ERROR); 2048 } 2049 2050 /* 2051 * Set starting offset to be either 0, or a negative index into 2052 * the GOT based on the number of small symbols we've got. 2053 */ 2054 neggotoffset = ((smlgotcnt > (M_GOT_MAXSMALL / 2)) ? 2055 -((smlgotcnt - (M_GOT_MAXSMALL / 2))) : 0); 2056 2057 /* 2058 * Initialize the large and small got offsets (used in assign_got()). 2059 */ 2060 small_index = neggotoffset == 0 ? M_GOT_XNumber : neggotoffset; 2061 large_index = neggotoffset + smlgotcnt; 2062 2063 /* 2064 * Assign bias to GOT symbols. 2065 */ 2066 addr = -neggotoffset * M_GOT_ENTSIZE; 2067 if (sdp = ld_sym_find(MSG_ORIG(MSG_SYM_GOFTBL), SYM_NOHASH, 0, ofl)) 2068 sdp->sd_sym->st_value = addr; 2069 if (sdp = ld_sym_find(MSG_ORIG(MSG_SYM_GOFTBL_U), SYM_NOHASH, 0, ofl)) 2070 sdp->sd_sym->st_value = addr; 2071 2072 if (ofl->ofl_tlsldgotndx) { 2073 ofl->ofl_tlsldgotndx->gn_gotndx = large_index; 2074 large_index += 2; 2075 } 2076 return (1); 2077 } 2078 2079 2080 /* 2081 * Initializes .got[0] with the _DYNAMIC symbol value. 2082 */ 2083 uintptr_t 2084 ld_fillin_gotplt(Ofl_desc * ofl) 2085 { 2086 if (ofl->ofl_osgot) { 2087 Sym_desc * sdp; 2088 2089 if ((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_DYNAMIC_U), 2090 SYM_NOHASH, 0, ofl)) != NULL) { 2091 uchar_t *genptr = ((uchar_t *) 2092 ofl->ofl_osgot->os_outdata->d_buf + 2093 (-neggotoffset * M_GOT_ENTSIZE) + 2094 (M_GOT_XDYNAMIC * M_GOT_ENTSIZE)); 2095 /* LINTED */ 2096 *((Xword *)genptr) = sdp->sd_sym->st_value; 2097 } 2098 } 2099 return (1); 2100 } 2101