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, 0), 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 * The addend field for R_SPARC_TLS_DTPMOD32 and R_SPARC_TLS_DTPMOD64 680 * mean nothing. The addend is propagated in the corresponding 681 * R_SPARC_TLS_DTPOFF* relocations. 682 */ 683 if (orsp->rel_rtype == M_R_DTPMOD) 684 raddend = 0; 685 686 relbits = (char *)relosp->os_outdata->d_buf; 687 688 rea.r_info = ELF_R_INFO(ndx, ELF_R_TYPE_INFO(orsp->rel_typedata, 689 orsp->rel_rtype)); 690 rea.r_offset = roffset; 691 rea.r_addend = raddend; 692 DBG_CALL(Dbg_reloc_out(ofl, ELF_DBG_LD, SHT_RELA, &rea, relosp->os_name, 693 orsp->rel_sname)); 694 695 /* 696 * Assert we haven't walked off the end of our relocation table. 697 */ 698 assert(relosp->os_szoutrels <= relosp->os_shdr->sh_size); 699 700 (void) memcpy((relbits + relosp->os_szoutrels), 701 (char *)&rea, sizeof (Rela)); 702 relosp->os_szoutrels += (Xword)sizeof (Rela); 703 704 /* 705 * Determine if this relocation is against a non-writable, allocatable 706 * section. If so we may need to provide a text relocation diagnostic. 707 */ 708 ld_reloc_remain_entry(orsp, osp, ofl); 709 return (1); 710 } 711 712 713 /* 714 * Sparc Instructions for TLS processing 715 */ 716 #if defined(_ELF64) 717 #define TLS_GD_IE_LD 0xd0580000 /* ldx [%g0 + %g0], %o0 */ 718 #else 719 #define TLS_GD_IE_LD 0xd0000000 /* ld [%g0 + %g0], %o0 */ 720 #endif 721 #define TLS_GD_IE_ADD 0x9001c008 /* add %g7, %o0, %o0 */ 722 723 #define TLS_GD_LE_XOR 0x80182000 /* xor %g0, 0, %g0 */ 724 #define TLS_IE_LE_OR 0x80100000 /* or %g0, %o0, %o1 */ 725 /* synthetic: mov %g0, %g0 */ 726 727 #define TLS_LD_LE_CLRO0 0x90100000 /* clr %o0 */ 728 729 #define FM3_REG_MSK_RD (0x1f << 25) /* Formate (3) rd register mask */ 730 /* bits 25->29 */ 731 #define FM3_REG_MSK_RS1 (0x1f << 14) /* Formate (3) rs1 register mask */ 732 /* bits 14->18 */ 733 #define FM3_REG_MSK_RS2 0x1f /* Formate (3) rs2 register mask */ 734 /* bits 0->4 */ 735 736 #define REG_G7 7 /* %g7 register */ 737 738 static Fixupret 739 tls_fixups(Ofl_desc *ofl, Rel_desc *arsp) 740 { 741 Sym_desc *sdp = arsp->rel_sym; 742 Word rtype = arsp->rel_rtype; 743 uint_t *offset; 744 745 offset = (uint_t *)((uintptr_t)arsp->rel_roffset + 746 (uintptr_t)_elf_getxoff(arsp->rel_isdesc->is_indata) + 747 (uintptr_t)arsp->rel_osdesc->os_outdata->d_buf); 748 749 if (sdp->sd_ref == REF_DYN_NEED) { 750 /* 751 * IE reference model 752 */ 753 switch (rtype) { 754 case R_SPARC_TLS_GD_HI22: 755 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 756 rtype, R_SPARC_TLS_IE_HI22, arsp->rel_roffset, 757 sdp->sd_name)); 758 arsp->rel_rtype = R_SPARC_TLS_IE_HI22; 759 return (FIX_RELOC); 760 761 case R_SPARC_TLS_GD_LO10: 762 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 763 rtype, R_SPARC_TLS_IE_LO10, arsp->rel_roffset, 764 sdp->sd_name)); 765 arsp->rel_rtype = R_SPARC_TLS_IE_LO10; 766 return (FIX_RELOC); 767 768 case R_SPARC_TLS_GD_ADD: 769 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 770 rtype, R_SPARC_NONE, arsp->rel_roffset, 771 sdp->sd_name)); 772 *offset = (TLS_GD_IE_LD | 773 (*offset & (FM3_REG_MSK_RS1 | FM3_REG_MSK_RS2))); 774 return (FIX_DONE); 775 776 case R_SPARC_TLS_GD_CALL: 777 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 778 rtype, R_SPARC_NONE, arsp->rel_roffset, 779 sdp->sd_name)); 780 *offset = TLS_GD_IE_ADD; 781 return (FIX_DONE); 782 } 783 return (FIX_RELOC); 784 } 785 786 /* 787 * LE reference model 788 */ 789 switch (rtype) { 790 case R_SPARC_TLS_IE_HI22: 791 case R_SPARC_TLS_GD_HI22: 792 case R_SPARC_TLS_LDO_HIX22: 793 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 794 R_SPARC_TLS_LE_HIX22, arsp->rel_roffset, sdp->sd_name)); 795 arsp->rel_rtype = R_SPARC_TLS_LE_HIX22; 796 return (FIX_RELOC); 797 798 case R_SPARC_TLS_LDO_LOX10: 799 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 800 R_SPARC_TLS_LE_LOX10, arsp->rel_roffset, sdp->sd_name)); 801 arsp->rel_rtype = R_SPARC_TLS_LE_LOX10; 802 return (FIX_RELOC); 803 804 case R_SPARC_TLS_IE_LO10: 805 case R_SPARC_TLS_GD_LO10: 806 /* 807 * Current instruction is: 808 * 809 * or r1, %lo(x), r2 810 * or 811 * add r1, %lo(x), r2 812 * 813 * 814 * Need to udpate this to: 815 * 816 * xor r1, %lox(x), r2 817 */ 818 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 819 R_SPARC_TLS_LE_LOX10, arsp->rel_roffset, sdp->sd_name)); 820 *offset = TLS_GD_LE_XOR | 821 (*offset & (FM3_REG_MSK_RS1 | FM3_REG_MSK_RD)); 822 arsp->rel_rtype = R_SPARC_TLS_LE_LOX10; 823 return (FIX_RELOC); 824 825 case R_SPARC_TLS_IE_LD: 826 case R_SPARC_TLS_IE_LDX: 827 /* 828 * Current instruction: 829 * ld{x} [r1 + r2], r3 830 * 831 * Need to update this to: 832 * 833 * mov r2, r3 (or %g0, r2, r3) 834 */ 835 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 836 R_SPARC_NONE, arsp->rel_roffset, sdp->sd_name)); 837 *offset = ((*offset) & (FM3_REG_MSK_RS2 | FM3_REG_MSK_RD)) | 838 TLS_IE_LE_OR; 839 return (FIX_DONE); 840 841 case R_SPARC_TLS_LDO_ADD: 842 case R_SPARC_TLS_GD_ADD: 843 /* 844 * Current instruction is: 845 * 846 * add gptr_reg, r2, r3 847 * 848 * Need to updated this to: 849 * 850 * add %g7, r2, r3 851 */ 852 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 853 R_SPARC_NONE, arsp->rel_roffset, sdp->sd_name)); 854 *offset = *offset & (~FM3_REG_MSK_RS1); 855 *offset = *offset | (REG_G7 << 14); 856 return (FIX_DONE); 857 858 case R_SPARC_TLS_LDM_CALL: 859 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 860 R_SPARC_NONE, arsp->rel_roffset, sdp->sd_name)); 861 *offset = TLS_LD_LE_CLRO0; 862 return (FIX_DONE); 863 864 case R_SPARC_TLS_LDM_HI22: 865 case R_SPARC_TLS_LDM_LO10: 866 case R_SPARC_TLS_LDM_ADD: 867 case R_SPARC_TLS_IE_ADD: 868 case R_SPARC_TLS_GD_CALL: 869 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 870 R_SPARC_NONE, arsp->rel_roffset, sdp->sd_name)); 871 *offset = M_NOP; 872 return (FIX_DONE); 873 } 874 return (FIX_RELOC); 875 } 876 877 #define GOTOP_ADDINST 0x80000000 /* add %g0, %g0, %g0 */ 878 879 static Fixupret 880 gotop_fixups(Ofl_desc *ofl, Rel_desc *arsp) 881 { 882 Sym_desc *sdp = arsp->rel_sym; 883 Word rtype = arsp->rel_rtype; 884 uint_t *offset; 885 const char *ifl_name; 886 887 switch (rtype) { 888 case R_SPARC_GOTDATA_OP_HIX22: 889 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 890 R_SPARC_GOTDATA_HIX22, arsp->rel_roffset, sdp->sd_name)); 891 arsp->rel_rtype = R_SPARC_GOTDATA_HIX22; 892 return (FIX_RELOC); 893 894 case R_SPARC_GOTDATA_OP_LOX10: 895 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 896 R_SPARC_GOTDATA_LOX10, arsp->rel_roffset, sdp->sd_name)); 897 arsp->rel_rtype = R_SPARC_GOTDATA_LOX10; 898 return (FIX_RELOC); 899 900 case R_SPARC_GOTDATA_OP: 901 /* 902 * Current instruction: 903 * ld{x} [r1 + r2], r3 904 * 905 * Need to update this to: 906 * 907 * add r1, r2, r3 908 */ 909 DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, rtype, 910 R_SPARC_NONE, arsp->rel_roffset, sdp->sd_name)); 911 offset = (uint_t *)(uintptr_t)(arsp->rel_roffset + 912 _elf_getxoff(arsp->rel_isdesc->is_indata) + 913 (uintptr_t)arsp->rel_osdesc->os_outdata->d_buf); 914 915 *offset = ((*offset) & (FM3_REG_MSK_RS1 | 916 FM3_REG_MSK_RS2 | FM3_REG_MSK_RD)) | GOTOP_ADDINST; 917 return (FIX_DONE); 918 } 919 /* 920 * We should not get here 921 */ 922 if (arsp->rel_isdesc->is_file) 923 ifl_name = arsp->rel_isdesc->is_file->ifl_name; 924 else 925 ifl_name = MSG_INTL(MSG_STR_NULL); 926 927 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_REL_BADGOTFIX), 928 conv_reloc_SPARC_type(arsp->rel_rtype, 0), 929 ifl_name, demangle(arsp->rel_sname)); 930 931 assert(0); 932 return (FIX_ERROR); 933 } 934 935 uintptr_t 936 ld_do_activerelocs(Ofl_desc *ofl) 937 { 938 Rel_desc *arsp; 939 Rel_cache *rcp; 940 Listnode *lnp; 941 uintptr_t return_code = 1; 942 Word flags = ofl->ofl_flags; 943 Word dtflags1 = ofl->ofl_dtflags_1; 944 945 if (ofl->ofl_actrels.head) 946 DBG_CALL(Dbg_reloc_doact_title(ofl->ofl_lml)); 947 948 /* 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 1047 } else if (IS_SIZE(arsp->rel_rtype)) { 1048 /* 1049 * Size relocations require the symbols size. 1050 */ 1051 value = sdp->sd_sym->st_size; 1052 } else { 1053 /* 1054 * Else the value is the symbols value. 1055 */ 1056 value = sdp->sd_sym->st_value; 1057 } 1058 1059 /* 1060 * Relocation against the GLOBAL_OFFSET_TABLE. 1061 */ 1062 if (arsp->rel_flags & FLG_REL_GOT) 1063 arsp->rel_osdesc = ofl->ofl_osgot; 1064 1065 /* 1066 * If loadable and not producing a relocatable object 1067 * add the sections virtual address to the reference 1068 * address. 1069 */ 1070 if ((arsp->rel_flags & FLG_REL_LOAD) && 1071 ((flags & FLG_OF_RELOBJ) == 0)) 1072 refaddr += arsp->rel_isdesc->is_osdesc-> 1073 os_shdr->sh_addr; 1074 1075 /* 1076 * If this entry has a PLT assigned to it, it's 1077 * value is actually the address of the PLT (and 1078 * not the address of the function). 1079 */ 1080 if (IS_PLT(arsp->rel_rtype)) { 1081 if (sdp->sd_aux && sdp->sd_aux->sa_PLTndx) 1082 value = ld_calc_plt_addr(sdp, ofl); 1083 } 1084 1085 /* 1086 * Add relocations addend to value. Add extra 1087 * relocation addend if needed. 1088 */ 1089 value += arsp->rel_raddend; 1090 if (IS_EXTOFFSET(arsp->rel_rtype)) 1091 value += arsp->rel_typedata; 1092 1093 /* 1094 * Determine whether the value needs further adjustment. 1095 * Filter through the attributes of the relocation to 1096 * determine what adjustment is required. Note, many 1097 * of the following cases are only applicable when a 1098 * .got is present. As a .got is not generated when a 1099 * relocatable object is being built, any adjustments 1100 * that require a .got need to be skipped. 1101 */ 1102 if ((arsp->rel_flags & FLG_REL_GOT) && 1103 ((flags & FLG_OF_RELOBJ) == 0)) { 1104 Xword R1addr; 1105 uintptr_t R2addr; 1106 Sword gotndx; 1107 Gotndx *gnp; 1108 Gotref gref; 1109 1110 /* 1111 * Clear the GOT table entry, on SPARC we clear 1112 * the entry and the 'value' if needed is stored 1113 * in an output relocations addend. 1114 * 1115 * Calculate offset into GOT at which to apply 1116 * the relocation. 1117 */ 1118 if (arsp->rel_flags & FLG_REL_DTLS) 1119 gref = GOT_REF_TLSGD; 1120 else if (arsp->rel_flags & FLG_REL_MTLS) 1121 gref = GOT_REF_TLSLD; 1122 else if (arsp->rel_flags & FLG_REL_STLS) 1123 gref = GOT_REF_TLSIE; 1124 else 1125 gref = GOT_REF_GENERIC; 1126 1127 gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), gref, 1128 ofl, arsp); 1129 assert(gnp); 1130 1131 if (arsp->rel_rtype == M_R_DTPOFF) 1132 gotndx = gnp->gn_gotndx + 1; 1133 else 1134 gotndx = gnp->gn_gotndx; 1135 1136 /* LINTED */ 1137 R1addr = (Xword)((-neggotoffset * 1138 M_GOT_ENTSIZE) + (gotndx * M_GOT_ENTSIZE)); 1139 1140 /* 1141 * Add the GOTs data's offset. 1142 */ 1143 R2addr = R1addr + (uintptr_t) 1144 arsp->rel_osdesc->os_outdata->d_buf; 1145 1146 DBG_CALL(Dbg_reloc_doact(ofl->ofl_lml, 1147 ELF_DBG_LD, M_MACH, SHT_RELA, 1148 arsp->rel_rtype, R1addr, value, 1149 arsp->rel_sname, arsp->rel_osdesc)); 1150 1151 /* 1152 * And do it. 1153 */ 1154 *(Xword *)R2addr = value; 1155 continue; 1156 1157 } else if (IS_GOT_BASED(arsp->rel_rtype) && 1158 ((flags & FLG_OF_RELOBJ) == 0)) { 1159 value -= (ofl->ofl_osgot->os_shdr->sh_addr + 1160 (-neggotoffset * M_GOT_ENTSIZE)); 1161 1162 } else if (IS_PC_RELATIVE(arsp->rel_rtype)) { 1163 value -= refaddr; 1164 1165 } else if (IS_TLS_INS(arsp->rel_rtype) && 1166 IS_GOT_RELATIVE(arsp->rel_rtype) && 1167 ((flags & FLG_OF_RELOBJ) == 0)) { 1168 Gotndx *gnp; 1169 Gotref gref; 1170 1171 if (arsp->rel_flags & FLG_REL_STLS) 1172 gref = GOT_REF_TLSIE; 1173 else if (arsp->rel_flags & FLG_REL_DTLS) 1174 gref = GOT_REF_TLSGD; 1175 else if (arsp->rel_flags & FLG_REL_MTLS) 1176 gref = GOT_REF_TLSLD; 1177 1178 gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), gref, 1179 ofl, arsp); 1180 assert(gnp); 1181 1182 value = gnp->gn_gotndx * M_GOT_ENTSIZE; 1183 1184 } else if (IS_GOT_RELATIVE(arsp->rel_rtype) && 1185 ((flags & FLG_OF_RELOBJ) == 0)) { 1186 Gotndx *gnp; 1187 1188 gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), 1189 GOT_REF_GENERIC, ofl, arsp); 1190 assert(gnp); 1191 1192 value = gnp->gn_gotndx * M_GOT_ENTSIZE; 1193 1194 } else if ((arsp->rel_flags & FLG_REL_STLS) && 1195 ((flags & FLG_OF_RELOBJ) == 0)) { 1196 Xword tlsstatsize; 1197 1198 /* 1199 * This is the LE TLS 1200 * reference model. Static offset 1201 * is hard-coded, and negated so that 1202 * it can be added to the thread pointer (%g7) 1203 */ 1204 tlsstatsize = S_ROUND(ofl-> 1205 ofl_tlsphdr->p_memsz, M_TLSSTATALIGN); 1206 value = -(tlsstatsize - value); 1207 } 1208 1209 if (arsp->rel_isdesc->is_file) 1210 ifl_name = arsp->rel_isdesc->is_file->ifl_name; 1211 else 1212 ifl_name = MSG_INTL(MSG_STR_NULL); 1213 1214 /* 1215 * Make sure we have data to relocate. Compiler and 1216 * assembler developers have been known to generate 1217 * relocations against invalid sections (normally .bss), 1218 * so for their benefit give them sufficient information 1219 * to help analyze the problem. End users should never 1220 * see this. 1221 */ 1222 if (arsp->rel_isdesc->is_indata->d_buf == 0) { 1223 eprintf(ofl->ofl_lml, ERR_FATAL, 1224 MSG_INTL(MSG_REL_EMPTYSEC), 1225 conv_reloc_SPARC_type(arsp->rel_rtype, 0), 1226 ifl_name, demangle(arsp->rel_sname), 1227 arsp->rel_isdesc->is_name); 1228 return (S_ERROR); 1229 } 1230 1231 /* 1232 * Get the address of the data item we need to modify. 1233 */ 1234 addr = (uchar_t *)((uintptr_t)arsp->rel_roffset + 1235 (uintptr_t)_elf_getxoff(arsp->rel_isdesc-> 1236 is_indata)); 1237 1238 /*LINTED*/ 1239 DBG_CALL(Dbg_reloc_doact(ofl->ofl_lml, ELF_DBG_LD, 1240 M_MACH, SHT_RELA, arsp->rel_rtype, EC_NATPTR(addr), 1241 value, arsp->rel_sname, arsp->rel_osdesc)); 1242 addr += (uintptr_t)arsp->rel_osdesc->os_outdata->d_buf; 1243 1244 if ((((uintptr_t)addr - (uintptr_t)ofl->ofl_nehdr) > 1245 ofl->ofl_size) || (arsp->rel_roffset > 1246 arsp->rel_osdesc->os_shdr->sh_size)) { 1247 int class; 1248 1249 if (((uintptr_t)addr - 1250 (uintptr_t)ofl->ofl_nehdr) > ofl->ofl_size) 1251 class = ERR_FATAL; 1252 else 1253 class = ERR_WARNING; 1254 1255 eprintf(ofl->ofl_lml, class, 1256 MSG_INTL(MSG_REL_INVALOFFSET), 1257 conv_reloc_SPARC_type(arsp->rel_rtype, 0), 1258 ifl_name, arsp->rel_isdesc->is_name, 1259 demangle(arsp->rel_sname), 1260 EC_ADDR((uintptr_t)addr - 1261 (uintptr_t)ofl->ofl_nehdr)); 1262 1263 if (class == ERR_FATAL) { 1264 return_code = S_ERROR; 1265 continue; 1266 } 1267 } 1268 1269 /* 1270 * If '-z noreloc' is specified - skip the do_reloc 1271 * stage. 1272 */ 1273 if ((flags & FLG_OF_RELOBJ) || 1274 !(dtflags1 & DF_1_NORELOC)) { 1275 if (do_reloc((uchar_t)arsp->rel_rtype, addr, 1276 &value, arsp->rel_sname, ifl_name, 1277 ofl->ofl_lml) == 0) 1278 return_code = S_ERROR; 1279 } 1280 } 1281 } 1282 return (return_code); 1283 } 1284 1285 uintptr_t 1286 ld_add_outrel(Word flags, Rel_desc *rsp, Ofl_desc *ofl) 1287 { 1288 Rel_desc *orsp; 1289 Rel_cache *rcp; 1290 Sym_desc *sdp = rsp->rel_sym; 1291 1292 /* 1293 * Static executables *do not* want any relocations against them. 1294 * Since our engine still creates relocations against a WEAK UNDEFINED 1295 * symbol in a static executable, it's best to disable them here 1296 * instead of through out the relocation code. 1297 */ 1298 if ((ofl->ofl_flags & (FLG_OF_STATIC | FLG_OF_EXEC)) == 1299 (FLG_OF_STATIC | FLG_OF_EXEC)) 1300 return (1); 1301 1302 /* 1303 * Certain relocations do not make sense in a 64bit shared object, 1304 * if building a shared object do a sanity check on the output 1305 * relocations being created. 1306 */ 1307 if (ofl->ofl_flags & FLG_OF_SHAROBJ) { 1308 Word rtype = rsp->rel_rtype; 1309 /* 1310 * Because the R_SPARC_HIPLT22 & R_SPARC_LOPLT10 relocations 1311 * are not relative they make no sense to create in a shared 1312 * object - so emit the proper error message if that occurs. 1313 */ 1314 if ((rtype == R_SPARC_HIPLT22) || 1315 (rtype == R_SPARC_LOPLT10)) { 1316 eprintf(ofl->ofl_lml, ERR_FATAL, 1317 MSG_INTL(MSG_REL_UNRELREL), 1318 conv_reloc_SPARC_type(rsp->rel_rtype, 0), 1319 rsp->rel_isdesc->is_file->ifl_name, 1320 demangle(rsp->rel_sname)); 1321 return (S_ERROR); 1322 } 1323 #if defined(_ELF64) 1324 /* 1325 * Each of the following relocations requires that the 1326 * object being built be loaded in either the upper 32 or 1327 * 44 bit range of memory. Since shared libraries traditionally 1328 * are loaded in the lower range of memory - this isn't going 1329 * to work. 1330 */ 1331 if ((rtype == R_SPARC_H44) || (rtype == R_SPARC_M44) || 1332 (rtype == R_SPARC_L44)) { 1333 eprintf(ofl->ofl_lml, ERR_FATAL, 1334 MSG_INTL(MSG_REL_SHOBJABS44), 1335 conv_reloc_SPARC_type(rsp->rel_rtype, 0), 1336 rsp->rel_isdesc->is_file->ifl_name, 1337 demangle(rsp->rel_sname)); 1338 return (S_ERROR); 1339 } 1340 #endif 1341 } 1342 1343 /* 1344 * If no relocation cache structures are available allocate 1345 * a new one and link it into the cache list. 1346 */ 1347 if ((ofl->ofl_outrels.tail == 0) || 1348 ((rcp = (Rel_cache *)ofl->ofl_outrels.tail->data) == 0) || 1349 ((orsp = rcp->rc_free) == rcp->rc_end)) { 1350 static size_t nextsize = 0; 1351 size_t size; 1352 1353 /* 1354 * Output relocation numbers can vary considerably between 1355 * building executables or shared objects (pic vs. non-pic), 1356 * etc. But, they typically aren't very large, so for these 1357 * objects use a standard bucket size. For building relocatable 1358 * objects, typically there will be an output relocation for 1359 * every input relocation. 1360 */ 1361 if (nextsize == 0) { 1362 if (ofl->ofl_flags & FLG_OF_RELOBJ) { 1363 if ((size = ofl->ofl_relocincnt) == 0) 1364 size = REL_LOIDESCNO; 1365 if (size > REL_HOIDESCNO) 1366 nextsize = REL_HOIDESCNO; 1367 else 1368 nextsize = REL_LOIDESCNO; 1369 } else 1370 nextsize = size = REL_HOIDESCNO; 1371 } else 1372 size = nextsize; 1373 1374 size = size * sizeof (Rel_desc); 1375 1376 if (((rcp = libld_malloc(sizeof (Rel_cache) + size)) == 0) || 1377 (list_appendc(&ofl->ofl_outrels, rcp) == 0)) 1378 return (S_ERROR); 1379 1380 /* LINTED */ 1381 rcp->rc_free = orsp = (Rel_desc *)(rcp + 1); 1382 /* LINTED */ 1383 rcp->rc_end = (Rel_desc *)((char *)rcp->rc_free + size); 1384 } 1385 1386 1387 /* 1388 * If we are adding a output relocation against a section 1389 * symbol (non-RELATIVE) then mark that section. These sections 1390 * will be added to the .dynsym symbol table. 1391 */ 1392 if (sdp && (rsp->rel_rtype != M_R_RELATIVE) && 1393 ((flags & FLG_REL_SCNNDX) || 1394 (ELF_ST_TYPE(sdp->sd_sym->st_info) == STT_SECTION))) { 1395 1396 /* 1397 * If this is a COMMON symbol - no output section 1398 * exists yet - (it's created as part of sym_validate()). 1399 * So - we mark here that when it's created it should 1400 * be tagged with the FLG_OS_OUTREL flag. 1401 */ 1402 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 1403 (sdp->sd_sym->st_shndx == SHN_COMMON)) { 1404 if (ELF_ST_TYPE(sdp->sd_sym->st_info) != STT_TLS) 1405 ofl->ofl_flags1 |= FLG_OF1_BSSOREL; 1406 else 1407 ofl->ofl_flags1 |= FLG_OF1_TLSOREL; 1408 } else { 1409 Os_desc *osp = sdp->sd_isc->is_osdesc; 1410 1411 if (osp && ((osp->os_flags & FLG_OS_OUTREL) == 0)) { 1412 ofl->ofl_dynshdrcnt++; 1413 osp->os_flags |= FLG_OS_OUTREL; 1414 } 1415 } 1416 } 1417 1418 *orsp = *rsp; 1419 orsp->rel_flags |= flags; 1420 1421 rcp->rc_free++; 1422 ofl->ofl_outrelscnt++; 1423 1424 if (flags & FLG_REL_GOT) 1425 ofl->ofl_relocgotsz += (Xword)sizeof (Rela); 1426 else if (flags & FLG_REL_PLT) 1427 ofl->ofl_relocpltsz += (Xword)sizeof (Rela); 1428 else if (flags & FLG_REL_BSS) 1429 ofl->ofl_relocbsssz += (Xword)sizeof (Rela); 1430 else if (flags & FLG_REL_NOINFO) 1431 ofl->ofl_relocrelsz += (Xword)sizeof (Rela); 1432 else 1433 orsp->rel_osdesc->os_szoutrels += (Xword)sizeof (Rela); 1434 1435 if (orsp->rel_rtype == M_R_RELATIVE) 1436 ofl->ofl_relocrelcnt++; 1437 1438 #if defined(_ELF64) 1439 /* 1440 * When building a 64-bit object any R_SPARC_WDISP30 relocation is given 1441 * a plt padding entry, unless we're building a relocatable object 1442 * (ld -r) or -b is in effect. 1443 */ 1444 if ((orsp->rel_rtype == R_SPARC_WDISP30) && 1445 ((ofl->ofl_flags & (FLG_OF_BFLAG | FLG_OF_RELOBJ)) == 0) && 1446 ((orsp->rel_sym->sd_flags & FLG_SY_PLTPAD) == 0)) { 1447 ofl->ofl_pltpad++; 1448 orsp->rel_sym->sd_flags |= FLG_SY_PLTPAD; 1449 } 1450 #endif 1451 /* 1452 * We don't perform sorting on PLT relocations because 1453 * they have already been assigned a PLT index and if we 1454 * were to sort them we would have to re-assign the plt indexes. 1455 */ 1456 if (!(flags & FLG_REL_PLT)) 1457 ofl->ofl_reloccnt++; 1458 1459 /* 1460 * Insure a GLOBAL_OFFSET_TABLE is generated if required. 1461 */ 1462 if (IS_GOT_REQUIRED(orsp->rel_rtype)) 1463 ofl->ofl_flags |= FLG_OF_BLDGOT; 1464 1465 /* 1466 * Identify and possibly warn of a displacement relocation. 1467 */ 1468 if (orsp->rel_flags & FLG_REL_DISP) { 1469 ofl->ofl_dtflags_1 |= DF_1_DISPRELPND; 1470 1471 if (ofl->ofl_flags & FLG_OF_VERBOSE) 1472 ld_disp_errmsg(MSG_INTL(MSG_REL_DISPREL4), orsp, ofl); 1473 } 1474 DBG_CALL(Dbg_reloc_ors_entry(ofl->ofl_lml, ELF_DBG_LD, SHT_RELA, 1475 M_MACH, orsp)); 1476 return (1); 1477 } 1478 1479 /* 1480 * Process relocation against a register symbol. Note, of -z muldefs is in 1481 * effect there may have been multiple register definitions, which would have 1482 * been processed as non-fatal, with the first definition winning. But, we 1483 * will also process multiple relocations for these multiple definitions. In 1484 * this case we must only preserve the relocation for the definition that was 1485 * kept. The sad part is that register relocations don't typically specify 1486 * the register symbol with which they are associated, so we might have to 1487 * search the input files global symbols to determine if this relocation is 1488 * appropriate. 1489 */ 1490 uintptr_t 1491 ld_reloc_register(Rel_desc * rsp, Is_desc * isp, Ofl_desc * ofl) 1492 { 1493 if (ofl->ofl_flags & FLG_OF_MULDEFS) { 1494 Ifl_desc * ifl = isp->is_file; 1495 Sym_desc * sdp = rsp->rel_sym; 1496 1497 if (sdp == 0) { 1498 Xword offset = rsp->rel_roffset; 1499 Word ndx; 1500 1501 for (ndx = ifl->ifl_locscnt; 1502 ndx < ifl->ifl_symscnt; ndx++) { 1503 if (((sdp = ifl->ifl_oldndx[ndx]) != 0) && 1504 (sdp->sd_flags & FLG_SY_REGSYM) && 1505 (sdp->sd_sym->st_value == offset)) 1506 break; 1507 } 1508 } 1509 if (sdp && (sdp->sd_file != ifl)) 1510 return (1); 1511 } 1512 return (ld_add_outrel((rsp->rel_flags | FLG_REL_REG), rsp, ofl)); 1513 } 1514 1515 /* 1516 * process relocation for a LOCAL symbol 1517 */ 1518 uintptr_t 1519 ld_reloc_local(Rel_desc * rsp, Ofl_desc * ofl) 1520 { 1521 Word flags = ofl->ofl_flags; 1522 Sym_desc *sdp = rsp->rel_sym; 1523 Word shndx = sdp->sd_sym->st_shndx; 1524 1525 /* 1526 * if ((shared object) and (not pc relative relocation) and 1527 * (not against ABS symbol)) 1528 * then 1529 * if (rtype != R_SPARC_32) 1530 * then 1531 * build relocation against section 1532 * else 1533 * build R_SPARC_RELATIVE 1534 * fi 1535 * fi 1536 */ 1537 if ((flags & FLG_OF_SHAROBJ) && (rsp->rel_flags & FLG_REL_LOAD) && 1538 !(IS_PC_RELATIVE(rsp->rel_rtype)) && !(IS_SIZE(rsp->rel_rtype)) && 1539 !(IS_GOT_BASED(rsp->rel_rtype)) && 1540 !(rsp->rel_isdesc != NULL && 1541 (rsp->rel_isdesc->is_shdr->sh_type == SHT_SUNW_dof)) && 1542 (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) || 1543 (shndx != SHN_ABS) || (sdp->sd_aux && sdp->sd_aux->sa_symspec))) { 1544 Word ortype = rsp->rel_rtype; 1545 1546 if ((rsp->rel_rtype != R_SPARC_32) && 1547 (rsp->rel_rtype != R_SPARC_PLT32) && 1548 (rsp->rel_rtype != R_SPARC_64)) 1549 return (ld_add_outrel((FLG_REL_SCNNDX | FLG_REL_ADVAL), 1550 rsp, ofl)); 1551 1552 rsp->rel_rtype = R_SPARC_RELATIVE; 1553 if (ld_add_outrel(FLG_REL_ADVAL, rsp, ofl) == S_ERROR) 1554 return (S_ERROR); 1555 rsp->rel_rtype = ortype; 1556 return (1); 1557 } 1558 1559 /* 1560 * If the relocation is against a 'non-allocatable' section 1561 * and we can not resolve it now - then give a warning 1562 * message. 1563 * 1564 * We can not resolve the symbol if either: 1565 * a) it's undefined 1566 * b) it's defined in a shared library and a 1567 * COPY relocation hasn't moved it to the executable 1568 * 1569 * Note: because we process all of the relocations against the 1570 * text segment before any others - we know whether 1571 * or not a copy relocation will be generated before 1572 * we get here (see reloc_init()->reloc_segments()). 1573 */ 1574 if (!(rsp->rel_flags & FLG_REL_LOAD) && 1575 ((shndx == SHN_UNDEF) || 1576 ((sdp->sd_ref == REF_DYN_NEED) && 1577 ((sdp->sd_flags & FLG_SY_MVTOCOMM) == 0)))) { 1578 /* 1579 * If the relocation is against a SHT_SUNW_ANNOTATE 1580 * section - then silently ignore that the relocation 1581 * can not be resolved. 1582 */ 1583 if (rsp->rel_osdesc && 1584 (rsp->rel_osdesc->os_shdr->sh_type == SHT_SUNW_ANNOTATE)) 1585 return (0); 1586 (void) eprintf(ofl->ofl_lml, ERR_WARNING, 1587 MSG_INTL(MSG_REL_EXTERNSYM), 1588 conv_reloc_SPARC_type(rsp->rel_rtype, 0), 1589 rsp->rel_isdesc->is_file->ifl_name, 1590 demangle(rsp->rel_sname), rsp->rel_osdesc->os_name); 1591 return (1); 1592 } 1593 1594 /* 1595 * Perform relocation. 1596 */ 1597 return (ld_add_actrel(NULL, rsp, ofl)); 1598 } 1599 1600 uintptr_t 1601 ld_reloc_GOTOP(Boolean local, Rel_desc * rsp, Ofl_desc * ofl) 1602 { 1603 Word rtype = rsp->rel_rtype; 1604 1605 if (!local) { 1606 /* 1607 * When binding to a external symbol, no fixups are required 1608 * and the GOTDATA_OP relocation can be ignored. 1609 */ 1610 if (rtype == R_SPARC_GOTDATA_OP) 1611 return (1); 1612 return (ld_reloc_GOT_relative(local, rsp, ofl)); 1613 } 1614 1615 /* 1616 * When binding to a local symbol the relocations can be transitioned: 1617 * 1618 * R_*_GOTDATA_OP_HIX22 -> R_*_GOTDATA_HIX22 1619 * R_*_GOTDATA_OP_LOX10 -> R_*_GOTDATA_LOX10 1620 * R_*_GOTDATA_OP -> instruction fixup 1621 */ 1622 return (ld_add_actrel(FLG_REL_GOTFIX, rsp, ofl)); 1623 } 1624 1625 uintptr_t 1626 ld_reloc_TLS(Boolean local, Rel_desc * rsp, Ofl_desc * ofl) 1627 { 1628 Word rtype = rsp->rel_rtype; 1629 Sym_desc *sdp = rsp->rel_sym; 1630 Word flags = ofl->ofl_flags; 1631 Gotndx *gnp; 1632 1633 /* 1634 * If we're building an executable - use either the IE or LE access 1635 * model. If we're building a shared object process any IE model. 1636 */ 1637 if ((flags & FLG_OF_EXEC) || (IS_TLS_IE(rtype))) { 1638 /* 1639 * Set the DF_STATIC_TLS flag. 1640 */ 1641 ofl->ofl_dtflags |= DF_STATIC_TLS; 1642 1643 if (!local || ((flags & FLG_OF_EXEC) == 0)) { 1644 /* 1645 * When processing static TLS - these relocations 1646 * can be ignored. 1647 */ 1648 if ((rtype == R_SPARC_TLS_IE_LD) || 1649 (rtype == R_SPARC_TLS_IE_LDX) || 1650 (rtype == R_SPARC_TLS_IE_ADD)) 1651 return (1); 1652 1653 /* 1654 * Assign a GOT entry for IE static TLS references. 1655 */ 1656 if (((rtype == R_SPARC_TLS_GD_HI22) || 1657 (rtype == R_SPARC_TLS_GD_LO10) || 1658 (rtype == R_SPARC_TLS_IE_HI22) || 1659 (rtype == R_SPARC_TLS_IE_LO10)) && 1660 ((gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), 1661 GOT_REF_TLSIE, ofl, rsp)) == 0)) { 1662 1663 if (ld_assign_got_TLS(local, rsp, ofl, sdp, 1664 gnp, GOT_REF_TLSIE, FLG_REL_STLS, 1665 rtype, M_R_TPOFF, 0) == S_ERROR) 1666 return (S_ERROR); 1667 } 1668 1669 /* 1670 * IE access model. 1671 */ 1672 if (IS_TLS_IE(rtype)) 1673 return (ld_add_actrel(FLG_REL_STLS, rsp, ofl)); 1674 1675 /* 1676 * Fixups are required for other executable models. 1677 */ 1678 return (ld_add_actrel((FLG_REL_TLSFIX | FLG_REL_STLS), 1679 rsp, ofl)); 1680 } 1681 1682 /* 1683 * LE access model. 1684 */ 1685 if (IS_TLS_LE(rtype)) 1686 return (ld_add_actrel(FLG_REL_STLS, rsp, ofl)); 1687 1688 /* 1689 * When processing static TLS - these relocations can be 1690 * ignored. 1691 */ 1692 if (rtype == R_SPARC_TLS_IE_ADD) 1693 return (1); 1694 1695 return (ld_add_actrel((FLG_REL_TLSFIX | FLG_REL_STLS), 1696 rsp, ofl)); 1697 } 1698 1699 /* 1700 * Building a shared object. 1701 * 1702 * For dynamic TLS references, ADD relocations are ignored. 1703 */ 1704 if ((rtype == R_SPARC_TLS_GD_ADD) || (rtype == R_SPARC_TLS_LDM_ADD) || 1705 (rtype == R_SPARC_TLS_LDO_ADD)) 1706 return (1); 1707 1708 /* 1709 * Assign a GOT entry for a dynamic TLS reference. 1710 */ 1711 if (((rtype == R_SPARC_TLS_LDM_HI22) || 1712 (rtype == R_SPARC_TLS_LDM_LO10)) && 1713 ((gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), GOT_REF_TLSLD, 1714 ofl, rsp)) == 0)) { 1715 1716 if (ld_assign_got_TLS(local, rsp, ofl, sdp, gnp, GOT_REF_TLSLD, 1717 FLG_REL_MTLS, rtype, M_R_DTPMOD, 0) == S_ERROR) 1718 return (S_ERROR); 1719 1720 } else if (((rtype == R_SPARC_TLS_GD_HI22) || 1721 (rtype == R_SPARC_TLS_GD_LO10)) && 1722 ((gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), GOT_REF_TLSGD, 1723 ofl, rsp)) == 0)) { 1724 1725 if (ld_assign_got_TLS(local, rsp, ofl, sdp, gnp, GOT_REF_TLSGD, 1726 FLG_REL_DTLS, rtype, M_R_DTPMOD, M_R_DTPOFF) == S_ERROR) 1727 return (S_ERROR); 1728 } 1729 1730 /* 1731 * For GD/LD TLS reference - TLS_{GD,LD}_CALL, this will eventually 1732 * cause a call to __tls_get_addr(). Convert this relocation to that 1733 * symbol now, and prepare for the PLT magic. 1734 */ 1735 if ((rtype == R_SPARC_TLS_GD_CALL) || (rtype == R_SPARC_TLS_LDM_CALL)) { 1736 Sym_desc * tlsgetsym; 1737 1738 if ((tlsgetsym = ld_sym_add_u(MSG_ORIG(MSG_SYM_TLSGETADDR_U), 1739 ofl)) == (Sym_desc *)S_ERROR) 1740 return (S_ERROR); 1741 1742 rsp->rel_sym = tlsgetsym; 1743 rsp->rel_sname = tlsgetsym->sd_name; 1744 rsp->rel_rtype = R_SPARC_WPLT30; 1745 1746 if (ld_reloc_plt(rsp, ofl) == S_ERROR) 1747 return (S_ERROR); 1748 1749 rsp->rel_sym = sdp; 1750 rsp->rel_sname = sdp->sd_name; 1751 rsp->rel_rtype = rtype; 1752 return (1); 1753 } 1754 1755 if (IS_TLS_LD(rtype)) 1756 return (ld_add_actrel(FLG_REL_MTLS, rsp, ofl)); 1757 1758 return (ld_add_actrel(FLG_REL_DTLS, rsp, ofl)); 1759 } 1760 1761 /* 1762 * ld_allocate_got: if a GOT is to be made, after the section is built this 1763 * function is called to allocate all the GOT slots. The allocation is 1764 * deferred until after all GOTs have been counted and sorted according 1765 * to their size, for only then will we know how to allocate them on 1766 * a processor like SPARC which has different models for addressing the 1767 * GOT. SPARC has two: small and large, small uses a signed 13-bit offset 1768 * into the GOT, whereas large uses an unsigned 32-bit offset. 1769 */ 1770 static Sword small_index; /* starting index for small GOT entries */ 1771 static Sword large_index; /* starting index for large GOT entries */ 1772 1773 uintptr_t 1774 ld_assign_got(Ofl_desc *ofl, Sym_desc * sdp) 1775 { 1776 Listnode * lnp; 1777 Gotndx * gnp; 1778 1779 for (LIST_TRAVERSE(&sdp->sd_GOTndxs, lnp, gnp)) { 1780 uint_t gotents; 1781 Gotref gref; 1782 gref = gnp->gn_gotref; 1783 if ((gref == GOT_REF_TLSGD) || (gref == GOT_REF_TLSLD)) 1784 gotents = 2; 1785 else 1786 gotents = 1; 1787 1788 switch (gnp->gn_gotndx) { 1789 case M_GOT_SMALL: 1790 gnp->gn_gotndx = small_index; 1791 small_index += gotents; 1792 if (small_index == 0) 1793 small_index = M_GOT_XNumber; 1794 break; 1795 case M_GOT_LARGE: 1796 gnp->gn_gotndx = large_index; 1797 large_index += gotents; 1798 break; 1799 default: 1800 eprintf(ofl->ofl_lml, ERR_FATAL, 1801 MSG_INTL(MSG_REL_ASSIGNGOT), 1802 EC_XWORD(gnp->gn_gotndx), demangle(sdp->sd_name)); 1803 return (S_ERROR); 1804 } 1805 } 1806 return (1); 1807 } 1808 1809 /* 1810 * Search the GOT index list for a GOT entry with the proper addend. 1811 */ 1812 Gotndx * 1813 ld_find_gotndx(List * lst, Gotref gref, Ofl_desc * ofl, Rel_desc * rdesc) 1814 { 1815 Listnode * lnp; 1816 Gotndx * gnp; 1817 1818 if ((gref == GOT_REF_TLSLD) && ofl->ofl_tlsldgotndx) 1819 return (ofl->ofl_tlsldgotndx); 1820 1821 for (LIST_TRAVERSE(lst, lnp, gnp)) { 1822 if ((rdesc->rel_raddend == gnp->gn_addend) && 1823 (gref == gnp->gn_gotref)) 1824 return (gnp); 1825 } 1826 return ((Gotndx *)0); 1827 } 1828 1829 Xword 1830 ld_calc_got_offset(Rel_desc * rdesc, Ofl_desc * ofl) 1831 { 1832 Os_desc *osp = ofl->ofl_osgot; 1833 Sym_desc *sdp = rdesc->rel_sym; 1834 Xword gotndx; 1835 Gotref gref; 1836 Gotndx *gnp; 1837 1838 if (rdesc->rel_flags & FLG_REL_DTLS) 1839 gref = GOT_REF_TLSGD; 1840 else if (rdesc->rel_flags & FLG_REL_MTLS) 1841 gref = GOT_REF_TLSLD; 1842 else if (rdesc->rel_flags & FLG_REL_STLS) 1843 gref = GOT_REF_TLSIE; 1844 else 1845 gref = GOT_REF_GENERIC; 1846 1847 gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), gref, ofl, rdesc); 1848 assert(gnp); 1849 1850 gotndx = (Xword)gnp->gn_gotndx; 1851 1852 if ((rdesc->rel_flags & FLG_REL_DTLS) && 1853 (rdesc->rel_rtype == M_R_DTPOFF)) 1854 gotndx++; 1855 1856 return ((Xword)((osp->os_shdr->sh_addr) + (gotndx * M_GOT_ENTSIZE) + 1857 (-neggotoffset * M_GOT_ENTSIZE))); 1858 } 1859 1860 uintptr_t 1861 ld_assign_got_ndx(List * lst, Gotndx * pgnp, Gotref gref, Ofl_desc * ofl, 1862 Rel_desc * rsp, Sym_desc * sdp) 1863 { 1864 Xword raddend; 1865 Gotndx * gnp, * _gnp; 1866 Listnode * lnp, * plnp; 1867 uint_t gotents; 1868 1869 raddend = rsp->rel_raddend; 1870 if (pgnp && (pgnp->gn_addend == raddend) && (pgnp->gn_gotref == gref)) { 1871 /* 1872 * If an entry for this addend already exists, determine if it 1873 * should be changed to a SMALL got. 1874 */ 1875 if ((pgnp->gn_gotndx != M_GOT_SMALL) && 1876 (rsp->rel_rtype == R_SPARC_GOT13)) { 1877 smlgotcnt++; 1878 pgnp->gn_gotndx = M_GOT_SMALL; 1879 sdp->sd_flags |= FLG_SY_SMGOT; 1880 } 1881 return (1); 1882 } 1883 1884 if ((gref == GOT_REF_TLSGD) || (gref == GOT_REF_TLSLD)) 1885 gotents = 2; 1886 else 1887 gotents = 1; 1888 1889 plnp = 0; 1890 for (LIST_TRAVERSE(lst, lnp, _gnp)) { 1891 if (_gnp->gn_addend > raddend) 1892 break; 1893 plnp = lnp; 1894 } 1895 1896 /* 1897 * Allocate a new entry. 1898 */ 1899 if ((gnp = libld_calloc(sizeof (Gotndx), 1)) == 0) 1900 return (S_ERROR); 1901 gnp->gn_addend = raddend; 1902 gnp->gn_gotref = gref; 1903 ofl->ofl_gotcnt += gotents; 1904 1905 if (rsp->rel_rtype == R_SPARC_GOT13) { 1906 gnp->gn_gotndx = M_GOT_SMALL; 1907 smlgotcnt++; 1908 sdp->sd_flags |= FLG_SY_SMGOT; 1909 } else 1910 gnp->gn_gotndx = M_GOT_LARGE; 1911 1912 if (gref == GOT_REF_TLSLD) { 1913 ofl->ofl_tlsldgotndx = gnp; 1914 return (1); 1915 } 1916 1917 if (plnp == 0) { 1918 /* 1919 * Insert at head of list 1920 */ 1921 if (list_prependc(lst, (void *)gnp) == 0) 1922 return (S_ERROR); 1923 } else if (_gnp->gn_addend > raddend) { 1924 /* 1925 * Insert in middle of lest 1926 */ 1927 if (list_insertc(lst, (void *)gnp, plnp) == 0) 1928 return (S_ERROR); 1929 } else { 1930 /* 1931 * Append to tail of list 1932 */ 1933 if (list_appendc(lst, (void *)gnp) == 0) 1934 return (S_ERROR); 1935 } 1936 return (1); 1937 } 1938 1939 void 1940 ld_assign_plt_ndx(Sym_desc * sdp, Ofl_desc *ofl) 1941 { 1942 sdp->sd_aux->sa_PLTndx = 1 + ofl->ofl_pltcnt++; 1943 } 1944 1945 1946 uintptr_t 1947 ld_allocate_got(Ofl_desc * ofl) 1948 { 1949 Sym_desc * sdp; 1950 Addr addr; 1951 1952 /* 1953 * Sanity check -- is this going to fit at all? 1954 */ 1955 if (smlgotcnt >= M_GOT_MAXSMALL) { 1956 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_REL_SMALLGOT), 1957 EC_WORD(smlgotcnt), M_GOT_MAXSMALL); 1958 return (S_ERROR); 1959 } 1960 1961 /* 1962 * Set starting offset to be either 0, or a negative index into 1963 * the GOT based on the number of small symbols we've got. 1964 */ 1965 neggotoffset = ((smlgotcnt > (M_GOT_MAXSMALL / 2)) ? 1966 -((smlgotcnt - (M_GOT_MAXSMALL / 2))) : 0); 1967 1968 /* 1969 * Initialize the large and small got offsets (used in assign_got()). 1970 */ 1971 small_index = neggotoffset == 0 ? M_GOT_XNumber : neggotoffset; 1972 large_index = neggotoffset + smlgotcnt; 1973 1974 /* 1975 * Assign bias to GOT symbols. 1976 */ 1977 addr = -neggotoffset * M_GOT_ENTSIZE; 1978 if (sdp = ld_sym_find(MSG_ORIG(MSG_SYM_GOFTBL), SYM_NOHASH, 0, ofl)) 1979 sdp->sd_sym->st_value = addr; 1980 if (sdp = ld_sym_find(MSG_ORIG(MSG_SYM_GOFTBL_U), SYM_NOHASH, 0, ofl)) 1981 sdp->sd_sym->st_value = addr; 1982 1983 if (ofl->ofl_tlsldgotndx) { 1984 ofl->ofl_tlsldgotndx->gn_gotndx = large_index; 1985 large_index += 2; 1986 } 1987 return (1); 1988 } 1989 1990 /* 1991 * Initializes .got[0] with the _DYNAMIC symbol value. 1992 */ 1993 uintptr_t 1994 ld_fillin_gotplt(Ofl_desc *ofl) 1995 { 1996 if (ofl->ofl_osgot) { 1997 Sym_desc *sdp; 1998 1999 if ((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_DYNAMIC_U), 2000 SYM_NOHASH, 0, ofl)) != NULL) { 2001 uchar_t *genptr; 2002 2003 genptr = ((uchar_t *)ofl->ofl_osgot->os_outdata->d_buf + 2004 (-neggotoffset * M_GOT_ENTSIZE) + 2005 (M_GOT_XDYNAMIC * M_GOT_ENTSIZE)); 2006 /* LINTED */ 2007 *((Xword *)genptr) = sdp->sd_sym->st_value; 2008 } 2009 } 2010 return (1); 2011 } 2012