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 2007 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 /* 32 * Update the new output file image, perform virtual address, offset and 33 * displacement calculations on the program headers and sections headers, 34 * and generate any new output section information. 35 */ 36 #include <stdio.h> 37 #include <string.h> 38 #include <unistd.h> 39 #include <debug.h> 40 #include "msg.h" 41 #include "_libld.h" 42 43 /* 44 * Comparison routine used by qsort() for sorting of the global symbol list 45 * based off of the hashbuckets the symbol will eventually be deposited in. 46 */ 47 static int 48 sym_hash_compare(Sym_s_list * s1, Sym_s_list * s2) 49 { 50 return (s1->sl_hval - s2->sl_hval); 51 } 52 53 /* 54 * Comparison routine used by qsort() for sorting of dyn[sym|tls]sort section 55 * indices based on the address of the symbols they reference. The 56 * use of the global dynsort_compare_syms variable is needed because 57 * we need to examine the symbols the indices reference. It is safe, because 58 * the linker is single threaded. 59 */ 60 Sym *dynsort_compare_syms; 61 62 static int 63 dynsort_compare(const void *idx1, const void *idx2) 64 { 65 Sym *s1 = dynsort_compare_syms + *((const Word *) idx1); 66 Sym *s2 = dynsort_compare_syms + *((const Word *) idx2); 67 68 /* 69 * Note: the logical computation for this is 70 * (st_value1 - st_value2) 71 * However, that is only correct if the address type is smaller 72 * than a pointer. Writing it this way makes it immune to the 73 * class (32 or 64-bit) of the linker. 74 */ 75 return ((s1->st_value < s2->st_value) ? -1 : 76 (s1->st_value > s2->st_value)); 77 } 78 79 80 /* 81 * Scan the sorted symbols, and issue warnings if there are any duplicate 82 * values in the list. We only do this if -zverbose is set, or we are 83 * running with LD_DEBUG defined 84 * 85 * entry: 86 * ofl - Output file descriptor 87 * ldynsym - Pointer to start of .SUNW_ldynsym section that the 88 * sort section indexes reference. 89 * symsort - Pointer to start of .SUNW_dynsymsort or .SUNW_dyntlssort 90 * section. 91 * n - # of indices in symsort array 92 * secname - Name of the symsort section. 93 * 94 * exit: 95 * If the symsort section contains indexes to more than one 96 * symbol with the same address value, a warning is issued. 97 */ 98 static void 99 dynsort_dupwarn(Ofl_desc *ofl, Sym *ldynsym, const char *str, 100 Word *symsort, Word n, const char *secname) 101 { 102 int zverbose = (ofl->ofl_flags & FLG_OF_VERBOSE) != 0; 103 Word ndx, cmp_ndx; 104 Addr addr, cmp_addr; 105 106 /* Nothing to do if -zverbose or LD_DEBUG are not active */ 107 if (!(zverbose || DBG_ENABLED)) 108 return; 109 110 cmp_ndx = 0; 111 cmp_addr = ldynsym[symsort[cmp_ndx]].st_value; 112 for (ndx = 1; ndx < n; ndx++) { 113 addr = ldynsym[symsort[ndx]].st_value; 114 if (cmp_addr == addr) { 115 if (zverbose) 116 eprintf(ofl->ofl_lml, ERR_WARNING, 117 MSG_INTL(MSG_SYM_DUPSORTADDR), secname, 118 str + ldynsym[symsort[cmp_ndx]].st_name, 119 str + ldynsym[symsort[ndx]].st_name, 120 EC_ADDR(addr)); 121 DBG_CALL(Dbg_syms_dup_sort_addr(ofl->ofl_lml, secname, 122 str + ldynsym[symsort[cmp_ndx]].st_name, 123 str + ldynsym[symsort[ndx]].st_name, 124 EC_ADDR(addr))); 125 } else { /* Not a dup. Move reference up */ 126 cmp_ndx = ndx; 127 cmp_addr = addr; 128 } 129 } 130 } 131 132 133 /* 134 * Build and update any output symbol tables. Here we work on all the symbol 135 * tables at once to reduce the duplication of symbol and string manipulation. 136 * Symbols and their associated strings are copied from the read-only input 137 * file images to the output image and their values and index's updated in the 138 * output image. 139 */ 140 static Addr 141 update_osym(Ofl_desc *ofl) 142 { 143 /* 144 * There are several places in this function where we wish 145 * to insert a symbol index to the combined .SUNW_ldynsym/.dynsym 146 * symbol table into one of the two sort sections (.SUNW_dynsymsort 147 * or .SUNW_dyntlssort), if that symbol has the right attributes. 148 * This macro is used to generate the necessary code from a single 149 * specification. 150 * 151 * entry: 152 * _sdp, _sym, _type - As per DYNSORT_COUNT. See _libld.h 153 * _sym_ndx - Index that _sym will have in the combined 154 * .SUNW_ldynsym/.dynsym symbol table. 155 */ 156 #define ADD_TO_DYNSORT(_sdp, _sym, _type, _sym_ndx) \ 157 { \ 158 Word *_dynsort_arr, *_dynsort_ndx; \ 159 \ 160 if (dynsymsort_symtype[_type]) { \ 161 _dynsort_arr = dynsymsort; \ 162 _dynsort_ndx = &dynsymsort_ndx; \ 163 } else if (_type == STT_TLS) { \ 164 _dynsort_arr = dyntlssort; \ 165 _dynsort_ndx = &dyntlssort_ndx; \ 166 } else { \ 167 _dynsort_arr = NULL; \ 168 } \ 169 if ((_dynsort_arr != NULL) && DYNSORT_TEST_ATTR(_sdp, _sym)) \ 170 _dynsort_arr[(*_dynsort_ndx)++] = _sym_ndx; \ 171 } 172 173 174 Listnode *lnp1; 175 Sym_desc *sdp; 176 Sym_avlnode *sav; 177 Sg_desc *sgp, *tsgp = 0, *dsgp = 0, *esgp = 0; 178 Os_desc *osp, *iosp = 0, *fosp = 0; 179 Ifl_desc *ifl; 180 Word bssndx, etext_ndx, edata_ndx = 0, end_ndx, start_ndx; 181 Word end_abs = 0, etext_abs = 0, edata_abs; 182 Word tlsbssndx = 0, sunwbssndx = 0, sunwdata1ndx; 183 #if (defined(__i386) || defined(__amd64)) && defined(_ELF64) 184 Word lbssndx = 0; 185 Addr lbssaddr = 0; 186 #endif 187 Addr bssaddr, etext = 0, edata = 0, end = 0, start = 0; 188 Addr tlsbssaddr = 0; 189 Addr sunwbssaddr = 0, sunwdata1addr; 190 int start_set = 0; 191 Sym _sym = {0}, *sym, *symtab = 0; 192 Sym *dynsym = 0, *ldynsym = 0; 193 Word symtab_ndx = 0; /* index into .symtab */ 194 Word ldynsym_ndx = 0; /* index into .SUNW_ldynsym */ 195 Word dynsym_ndx = 0; /* index into .dynsym */ 196 Word scopesym_ndx = 0; /* index into scoped symbols */ 197 Word ldynscopesym_ndx = 0; /* index to ldynsym scoped syms */ 198 Word *dynsymsort = NULL; /* SUNW_dynsymsort index vector */ 199 Word *dyntlssort = NULL; /* SUNW_dyntlssort index vector */ 200 Word dynsymsort_ndx; /* index dynsymsort array */ 201 Word dyntlssort_ndx; /* index dyntlssort array */ 202 Word *symndx; /* Symbol index (for relocation use) */ 203 Word *symshndx = 0; /* .symtab_shndx table */ 204 Word *dynshndx = 0; /* .dynsym_shndx table */ 205 Word *ldynshndx = 0; /* .SUNW_ldynsym_shndx table */ 206 Word ldynsym_cnt = 0; /* # of items in .SUNW_ldynsym */ 207 Str_tbl *shstrtab; 208 Str_tbl *strtab; 209 Str_tbl *dynstr; 210 Word *hashtab; /* hash table pointer */ 211 Word *hashbkt; /* hash table bucket pointer */ 212 Word *hashchain; /* hash table chain pointer */ 213 Word hashval; /* value of hash function */ 214 Wk_desc *wkp; 215 List weak = {NULL, NULL}; 216 Word flags = ofl->ofl_flags; 217 Word dtflags_1 = ofl->ofl_dtflags_1; 218 Versym *versym; 219 Gottable *gottable; /* used for display got debugging */ 220 /* information */ 221 Syminfo *syminfo; 222 Sym_s_list *sorted_syms; /* table to hold sorted symbols */ 223 Word ssndx; /* global index into sorted_syms */ 224 Word scndx; /* scoped index into sorted_syms */ 225 uint_t stoff; /* string offset */ 226 227 /* 228 * Initialize pointers to the symbol table entries and the symbol 229 * table strings. Skip the first symbol entry and the first string 230 * table byte. Note that if we are not generating any output symbol 231 * tables we must still generate and update an internal copies so 232 * that the relocation phase has the correct information. 233 */ 234 if (!(flags & FLG_OF_STRIP) || (flags & FLG_OF_RELOBJ) || 235 ((flags & FLG_OF_STATIC) && ofl->ofl_osversym)) { 236 symtab = (Sym *)ofl->ofl_ossymtab->os_outdata->d_buf; 237 symtab[symtab_ndx++] = _sym; 238 if (ofl->ofl_ossymshndx) 239 symshndx = (Word *)ofl->ofl_ossymshndx->os_outdata->d_buf; 240 } 241 if (OFL_ALLOW_DYNSYM(ofl)) { 242 dynsym = (Sym *)ofl->ofl_osdynsym->os_outdata->d_buf; 243 dynsym[dynsym_ndx++] = _sym; 244 /* 245 * If we are also constructing a .SUNW_ldynsym section 246 * to contain local function symbols, then set it up too. 247 */ 248 if (ofl->ofl_osldynsym) { 249 ldynsym = (Sym *)ofl->ofl_osldynsym->os_outdata->d_buf; 250 ldynsym[ldynsym_ndx++] = _sym; 251 ldynsym_cnt = 1 + ofl->ofl_dynlocscnt + 252 ofl->ofl_dynscopecnt; 253 254 /* 255 * If there is a SUNW_ldynsym, then there may also 256 * be a .SUNW_dynsymsort and/or .SUNW_dyntlssort 257 * sections, used to collect indices of function 258 * and data symbols sorted by address order. 259 */ 260 if (ofl->ofl_osdynsymsort) { /* .SUNW_dynsymsort */ 261 dynsymsort = (Word *) 262 ofl->ofl_osdynsymsort->os_outdata->d_buf; 263 dynsymsort_ndx = 0; 264 } 265 if (ofl->ofl_osdyntlssort) { /* .SUNW_dyntlssort */ 266 dyntlssort = (Word *) 267 ofl->ofl_osdyntlssort->os_outdata->d_buf; 268 dyntlssort_ndx = 0; 269 } 270 } 271 272 /* 273 * Initialize the hash table. 274 */ 275 hashtab = (Word *)(ofl->ofl_oshash->os_outdata->d_buf); 276 hashbkt = &hashtab[2]; 277 hashchain = &hashtab[2 + ofl->ofl_hashbkts]; 278 hashtab[0] = ofl->ofl_hashbkts; 279 hashtab[1] = ofl->ofl_dynshdrcnt + ofl->ofl_globcnt + 280 ofl->ofl_lregsymcnt + 1; 281 if (ofl->ofl_osdynshndx) 282 dynshndx = (Word *)ofl->ofl_osdynshndx->os_outdata->d_buf; 283 if (ofl->ofl_osldynshndx) 284 ldynshndx = (Word *)ofl->ofl_osldynshndx->os_outdata->d_buf; 285 } 286 287 /* 288 * symndx is the symbol index to be used for relocation processing. It 289 * points to the relevant symtab's (.dynsym or .symtab) symbol ndx. 290 */ 291 if (dynsym) 292 symndx = &dynsym_ndx; 293 else 294 symndx = &symtab_ndx; 295 296 /* 297 * If we have version definitions initialize the version symbol index 298 * table. There is one entry for each symbol which contains the symbols 299 * version index. 300 */ 301 if ((flags & (FLG_OF_VERDEF | FLG_OF_NOVERSEC)) == FLG_OF_VERDEF) { 302 versym = (Versym *)ofl->ofl_osversym->os_outdata->d_buf; 303 versym[0] = 0; 304 } else 305 versym = 0; 306 307 /* 308 * If syminfo section exists be prepared to fill it in. 309 */ 310 if (ofl->ofl_ossyminfo) { 311 syminfo = ofl->ofl_ossyminfo->os_outdata->d_buf; 312 syminfo[0].si_flags = SYMINFO_CURRENT; 313 } else 314 syminfo = 0; 315 316 /* 317 * Setup our string tables. 318 */ 319 shstrtab = ofl->ofl_shdrsttab; 320 strtab = ofl->ofl_strtab; 321 dynstr = ofl->ofl_dynstrtab; 322 323 DBG_CALL(Dbg_syms_sec_title(ofl->ofl_lml)); 324 325 /* 326 * Put output file name to the first .symtab and .SUNW_ldynsym symbol. 327 */ 328 if (symtab) { 329 (void) st_setstring(strtab, ofl->ofl_name, &stoff); 330 sym = &symtab[symtab_ndx++]; 331 /* LINTED */ 332 sym->st_name = stoff; 333 sym->st_value = 0; 334 sym->st_size = 0; 335 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_FILE); 336 sym->st_other = 0; 337 sym->st_shndx = SHN_ABS; 338 339 if (versym && !dynsym) 340 versym[1] = 0; 341 } 342 if (ldynsym) { 343 (void) st_setstring(dynstr, ofl->ofl_name, &stoff); 344 sym = &ldynsym[ldynsym_ndx]; 345 /* LINTED */ 346 sym->st_name = stoff; 347 sym->st_value = 0; 348 sym->st_size = 0; 349 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_FILE); 350 sym->st_other = 0; 351 sym->st_shndx = SHN_ABS; 352 353 /* Scoped symbols get filled in global loop below */ 354 ldynscopesym_ndx = ldynsym_ndx + 1; 355 ldynsym_ndx += ofl->ofl_dynscopecnt; 356 } 357 358 /* 359 * If we are to display GOT summary information, then allocate 360 * the buffer to 'cache' the GOT symbols into now. 361 */ 362 if (DBG_ENABLED) { 363 if ((ofl->ofl_gottable = gottable = 364 libld_calloc(ofl->ofl_gotcnt, sizeof (Gottable))) == 0) 365 return ((Addr)S_ERROR); 366 } 367 368 /* 369 * Traverse the program headers. Determine the last executable segment 370 * and the last data segment so that we can update etext and edata. If 371 * we have empty segments (reservations) record them for setting _end. 372 */ 373 for (LIST_TRAVERSE(&ofl->ofl_segs, lnp1, sgp)) { 374 Phdr *phd = &(sgp->sg_phdr); 375 Os_desc **ospp; 376 Aliste off; 377 378 if (phd->p_type == PT_LOAD) { 379 if (sgp->sg_osdescs != NULL) { 380 Word _flags = phd->p_flags & (PF_W | PF_R); 381 382 if (_flags == PF_R) 383 tsgp = sgp; 384 else if (_flags == (PF_W | PF_R)) 385 dsgp = sgp; 386 } else if (sgp->sg_flags & FLG_SG_EMPTY) 387 esgp = sgp; 388 } 389 390 /* 391 * Generate a section symbol for each output section. 392 */ 393 for (ALIST_TRAVERSE(sgp->sg_osdescs, off, ospp)) { 394 Word sectndx; 395 396 osp = *ospp; 397 398 sym = &_sym; 399 sym->st_value = osp->os_shdr->sh_addr; 400 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_SECTION); 401 /* LINTED */ 402 sectndx = elf_ndxscn(osp->os_scn); 403 404 if (symtab) { 405 if (sectndx >= SHN_LORESERVE) { 406 symshndx[symtab_ndx] = sectndx; 407 sym->st_shndx = SHN_XINDEX; 408 } else { 409 /* LINTED */ 410 sym->st_shndx = (Half)sectndx; 411 } 412 symtab[symtab_ndx++] = *sym; 413 } 414 415 if (dynsym && (osp->os_flags & FLG_OS_OUTREL)) 416 dynsym[dynsym_ndx++] = *sym; 417 418 if ((dynsym == 0) || (osp->os_flags & FLG_OS_OUTREL)) { 419 if (versym) 420 versym[*symndx - 1] = 0; 421 osp->os_scnsymndx = *symndx - 1; 422 DBG_CALL(Dbg_syms_sec_entry(ofl->ofl_lml, 423 osp->os_scnsymndx, sgp, osp)); 424 } 425 426 /* 427 * Generate the .shstrtab for this section. 428 */ 429 (void) st_setstring(shstrtab, osp->os_name, &stoff); 430 osp->os_shdr->sh_name = (Word)stoff; 431 432 /* 433 * Find the section index for our special symbols. 434 */ 435 if (sgp == tsgp) { 436 /* LINTED */ 437 etext_ndx = elf_ndxscn(osp->os_scn); 438 } else if (dsgp == sgp) { 439 if (osp->os_shdr->sh_type != SHT_NOBITS) { 440 /* LINTED */ 441 edata_ndx = elf_ndxscn(osp->os_scn); 442 } 443 } 444 445 if (start_set == 0) { 446 start = sgp->sg_phdr.p_vaddr; 447 /* LINTED */ 448 start_ndx = elf_ndxscn(osp->os_scn); 449 start_set++; 450 } 451 452 /* 453 * While we're here, determine whether a .init or .fini 454 * section exist. 455 */ 456 if ((iosp == 0) && (strcmp(osp->os_name, 457 MSG_ORIG(MSG_SCN_INIT)) == 0)) 458 iosp = osp; 459 if ((fosp == 0) && (strcmp(osp->os_name, 460 MSG_ORIG(MSG_SCN_FINI)) == 0)) 461 fosp = osp; 462 } 463 } 464 465 /* 466 * Add local register symbols to the .dynsym. These are required as 467 * DT_REGISTER .dynamic entries must have a symbol to reference. 468 */ 469 if (ofl->ofl_regsyms && dynsym) { 470 int ndx; 471 472 for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 473 Sym_desc * rsdp; 474 475 if ((rsdp = ofl->ofl_regsyms[ndx]) == 0) 476 continue; 477 478 if (((rsdp->sd_flags1 & FLG_SY1_LOCL) == 0) && 479 (ELF_ST_BIND(rsdp->sd_sym->st_info) != STB_LOCAL)) 480 continue; 481 482 dynsym[dynsym_ndx] = *(rsdp->sd_sym); 483 rsdp->sd_symndx = *symndx; 484 485 if (dynsym[dynsym_ndx].st_name) { 486 (void) st_setstring(dynstr, rsdp->sd_name, 487 &stoff); 488 dynsym[dynsym_ndx].st_name = stoff; 489 } 490 dynsym_ndx++; 491 } 492 } 493 494 /* 495 * Having traversed all the output segments, warn the user if the 496 * traditional text or data segments don't exist. Otherwise from these 497 * segments establish the values for `etext', `edata', `end', `END', 498 * and `START'. 499 */ 500 if (!(flags & FLG_OF_RELOBJ)) { 501 Sg_desc * sgp; 502 503 if (tsgp) 504 etext = tsgp->sg_phdr.p_vaddr + tsgp->sg_phdr.p_filesz; 505 else { 506 etext = (Addr)0; 507 etext_ndx = SHN_ABS; 508 etext_abs = 1; 509 if (ofl->ofl_flags & FLG_OF_VERBOSE) 510 eprintf(ofl->ofl_lml, ERR_WARNING, 511 MSG_INTL(MSG_UPD_NOREADSEG)); 512 } 513 if (dsgp) { 514 edata = dsgp->sg_phdr.p_vaddr + dsgp->sg_phdr.p_filesz; 515 } else { 516 edata = (Addr)0; 517 edata_ndx = SHN_ABS; 518 edata_abs = 1; 519 if (ofl->ofl_flags & FLG_OF_VERBOSE) 520 eprintf(ofl->ofl_lml, ERR_WARNING, 521 MSG_INTL(MSG_UPD_NORDWRSEG)); 522 } 523 524 if (dsgp == 0) { 525 if (tsgp) 526 sgp = tsgp; 527 else 528 sgp = 0; 529 } else if (tsgp == 0) 530 sgp = dsgp; 531 else if (dsgp->sg_phdr.p_vaddr > tsgp->sg_phdr.p_vaddr) 532 sgp = dsgp; 533 else if (dsgp->sg_phdr.p_vaddr < tsgp->sg_phdr.p_vaddr) 534 sgp = tsgp; 535 else { 536 /* 537 * One of the segments must be of zero size. 538 */ 539 if (tsgp->sg_phdr.p_memsz) 540 sgp = tsgp; 541 else 542 sgp = dsgp; 543 } 544 545 if (esgp && (esgp->sg_phdr.p_vaddr > sgp->sg_phdr.p_vaddr)) 546 sgp = esgp; 547 548 if (sgp) { 549 end = sgp->sg_phdr.p_vaddr + sgp->sg_phdr.p_memsz; 550 551 /* 552 * If the last loadable segment is a read-only segment, 553 * then the application which uses the symbol _end to 554 * find the beginning of writable heap area may cause 555 * segmentation violation. We adjust the value of the 556 * _end to skip to the next page boundary. 557 * 558 * 6401812 System interface which returs beginning 559 * heap would be nice. 560 * When the above RFE is implemented, the changes below 561 * could be changed in a better way. 562 */ 563 if ((sgp->sg_phdr.p_flags & PF_W) == 0) 564 end = (Addr) S_ROUND(end, sysconf(_SC_PAGESIZE)); 565 566 /* 567 * If we're dealing with a memory reservation there are 568 * no sections to establish an index for _end, so assign 569 * it as an absolute. 570 */ 571 if (sgp->sg_osdescs != NULL) { 572 Os_desc **ospp; 573 Alist *alp = sgp->sg_osdescs; 574 Aliste last = alp->al_next - alp->al_size; 575 576 /* 577 * Determine the last section for this segment. 578 */ 579 /* LINTED */ 580 ospp = (Os_desc **)((char *)alp + last); 581 /* LINTED */ 582 end_ndx = elf_ndxscn((*ospp)->os_scn); 583 } else { 584 end_ndx = SHN_ABS; 585 end_abs = 1; 586 } 587 } else { 588 end = (Addr) 0; 589 end_ndx = SHN_ABS; 590 end_abs = 1; 591 eprintf(ofl->ofl_lml, ERR_WARNING, 592 MSG_INTL(MSG_UPD_NOSEG)); 593 } 594 } 595 596 DBG_CALL(Dbg_syms_up_title(ofl->ofl_lml)); 597 598 /* 599 * Initialize the scoped symbol table entry point. This is for all 600 * the global symbols that have been scoped to locals and will be 601 * filled in during global symbol processing so that we don't have 602 * to traverse the globals symbol hash array more than once. 603 */ 604 if (symtab) { 605 scopesym_ndx = symtab_ndx; 606 symtab_ndx += ofl->ofl_scopecnt; 607 } 608 609 /* 610 * Assign .sunwdata1 information 611 */ 612 if (ofl->ofl_issunwdata1) { 613 osp = ofl->ofl_issunwdata1->is_osdesc; 614 sunwdata1addr = (Addr)(osp->os_shdr->sh_addr + 615 ofl->ofl_issunwdata1->is_indata->d_off); 616 /* LINTED */ 617 sunwdata1ndx = elf_ndxscn(osp->os_scn); 618 ofl->ofl_sunwdata1ndx = osp->os_scnsymndx; 619 } 620 621 /* 622 * If we are generating a .symtab collect all the local symbols, 623 * assigning a new virtual address or displacement (value). 624 */ 625 for (LIST_TRAVERSE(&ofl->ofl_objs, lnp1, ifl)) { 626 Xword lndx, local; 627 Is_desc * isc; 628 629 /* 630 * Check that we have local symbols to process. If the user 631 * has indicated scoping then scan the global symbols also 632 * looking for entries from this file to reduce to locals. 633 */ 634 if ((local = ifl->ifl_locscnt) == 0) 635 continue; 636 637 for (lndx = 1; lndx < local; lndx++) { 638 Listnode *lnp2; 639 Gotndx *gnp; 640 uchar_t type; 641 Word *_symshndx; 642 int enter_in_symtab, enter_in_ldynsym; 643 int update_done; 644 645 sdp = ifl->ifl_oldndx[lndx]; 646 sym = sdp->sd_sym; 647 648 #if defined(sparc) || defined(__sparcv9) 649 /* 650 * Assign a got offset if necessary. 651 */ 652 if (ld_assign_got(ofl, sdp) == S_ERROR) 653 return ((Addr)S_ERROR); 654 #elif defined(i386) || defined(__amd64) 655 /* nothing to do */ 656 #else 657 #error Unknown architecture! 658 #endif 659 if (DBG_ENABLED) { 660 for (LIST_TRAVERSE(&sdp->sd_GOTndxs, lnp2, gnp)) { 661 gottable->gt_sym = sdp; 662 gottable->gt_gndx.gn_gotndx = gnp->gn_gotndx; 663 gottable->gt_gndx.gn_addend = gnp->gn_addend; 664 gottable++; 665 } 666 } 667 668 if ((type = ELF_ST_TYPE(sym->st_info)) == STT_SECTION) 669 continue; 670 671 /* 672 * Ignore any symbols that have been marked as invalid 673 * during input processing. Providing these aren't used 674 * for relocation they'll just be dropped from the 675 * output image. 676 */ 677 if (sdp->sd_flags & FLG_SY_INVALID) 678 continue; 679 680 /* 681 * If the section that this symbol was associated 682 * with has been discarded - then we discard 683 * the local symbol along with it. 684 */ 685 if (sdp->sd_flags & FLG_SY_ISDISC) 686 continue; 687 688 /* 689 * Generate an output symbol to represent this input 690 * symbol. Even if the symbol table is to be stripped 691 * we still need to update any local symbols that are 692 * used during relocation. 693 */ 694 enter_in_symtab = symtab && 695 (!(ofl->ofl_flags1 & FLG_OF1_REDLSYM) || 696 (sdp->sd_psyminfo)); 697 enter_in_ldynsym = ldynsym && sdp->sd_name && 698 ldynsym_symtype[type] && 699 !(ofl->ofl_flags1 & FLG_OF1_REDLSYM); 700 _symshndx = 0; 701 if (enter_in_symtab) { 702 if (!dynsym) 703 sdp->sd_symndx = *symndx; 704 symtab[symtab_ndx] = *sym; 705 /* 706 * Provided this isn't an unnamed register 707 * symbol, update its name. 708 */ 709 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 710 symtab[symtab_ndx].st_name) { 711 (void) st_setstring(strtab, 712 sdp->sd_name, &stoff); 713 symtab[symtab_ndx].st_name = stoff; 714 } 715 sdp->sd_flags &= ~FLG_SY_CLEAN; 716 if (symshndx) 717 _symshndx = &symshndx[symtab_ndx]; 718 sdp->sd_sym = sym = &symtab[symtab_ndx++]; 719 720 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 721 (sym->st_shndx == SHN_ABS) && 722 !enter_in_ldynsym) 723 continue; 724 } else if (enter_in_ldynsym) { 725 /* 726 * Not using symtab, but we do have ldynsym 727 * available. 728 */ 729 ldynsym[ldynsym_ndx] = *sym; 730 (void) st_setstring(dynstr, sdp->sd_name, 731 &stoff); 732 ldynsym[ldynsym_ndx].st_name = stoff; 733 734 sdp->sd_flags &= ~FLG_SY_CLEAN; 735 if (ldynshndx) 736 _symshndx = &ldynshndx[ldynsym_ndx]; 737 sdp->sd_sym = sym = &ldynsym[ldynsym_ndx]; 738 /* Add it to sort section if it qualifies */ 739 ADD_TO_DYNSORT(sdp, sym, type, ldynsym_ndx); 740 ldynsym_ndx++; 741 } else { /* Not using symtab or ldynsym */ 742 /* 743 * If this symbol requires modifying to provide 744 * for a relocation or move table update, make 745 * a copy of it. 746 */ 747 if (!(sdp->sd_flags & FLG_SY_UPREQD) && 748 !(sdp->sd_psyminfo)) 749 continue; 750 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 751 (sym->st_shndx == SHN_ABS)) 752 continue; 753 754 if (ld_sym_copy(sdp) == S_ERROR) 755 return ((Addr)S_ERROR); 756 sym = sdp->sd_sym; 757 } 758 759 /* 760 * Update the symbols contents if necessary. 761 */ 762 update_done = 0; 763 if (type == STT_FILE) { 764 sdp->sd_shndx = sym->st_shndx = SHN_ABS; 765 sdp->sd_flags |= FLG_SY_SPECSEC; 766 update_done = 1; 767 } 768 769 /* 770 * If we are expanding the locally bound partially 771 * initialized symbols, then update the address here. 772 */ 773 if (ofl->ofl_issunwdata1 && 774 (sdp->sd_flags & FLG_SY_PAREXPN) && !update_done) { 775 static Addr laddr = 0; 776 777 sym->st_shndx = sunwdata1ndx; 778 sdp->sd_isc = ofl->ofl_issunwdata1; 779 if (ofl->ofl_flags & FLG_OF_RELOBJ) { 780 sym->st_value = sunwdata1addr; 781 } else { 782 sym->st_value = laddr; 783 laddr += sym->st_size; 784 } 785 sunwdata1addr += sym->st_size; 786 } 787 788 /* 789 * If this isn't an UNDEF symbol (ie. an input section 790 * is associated), update the symbols value and index. 791 */ 792 if (((isc = sdp->sd_isc) != 0) && !update_done) { 793 Word sectndx; 794 795 osp = isc->is_osdesc; 796 /* LINTED */ 797 sym->st_value += 798 (Off)_elf_getxoff(isc->is_indata); 799 if (!(flags & FLG_OF_RELOBJ)) { 800 sym->st_value += osp->os_shdr->sh_addr; 801 /* 802 * TLS symbols are relative to 803 * the TLS segment. 804 */ 805 if ((type == STT_TLS) && 806 (ofl->ofl_tlsphdr)) { 807 sym->st_value -= 808 ofl->ofl_tlsphdr->p_vaddr; 809 } 810 } 811 /* LINTED */ 812 if ((sdp->sd_shndx = sectndx = 813 elf_ndxscn(osp->os_scn)) >= SHN_LORESERVE) { 814 if (_symshndx) { 815 *_symshndx = sectndx; 816 } 817 sym->st_shndx = SHN_XINDEX; 818 } else { 819 /* LINTED */ 820 sym->st_shndx = sectndx; 821 } 822 } 823 824 /* 825 * If entering the symbol in both the symtab and the 826 * ldynsym, then the one in symtab needs to be 827 * copied to ldynsym. If it is only in the ldynsym, 828 * then the code above already set it up and we have 829 * nothing more to do here. 830 */ 831 if (enter_in_symtab && enter_in_ldynsym) { 832 ldynsym[ldynsym_ndx] = *sym; 833 (void) st_setstring(dynstr, sdp->sd_name, 834 &stoff); 835 ldynsym[ldynsym_ndx].st_name = stoff; 836 837 if (_symshndx && ldynshndx) 838 ldynshndx[ldynsym_ndx] = *_symshndx; 839 840 /* Add it to sort section if it qualifies */ 841 ADD_TO_DYNSORT(sdp, sym, type, ldynsym_ndx); 842 843 ldynsym_ndx++; 844 } 845 } 846 } 847 848 /* 849 * Two special symbols are `_init' and `_fini'. If these are supplied 850 * by crti.o then they are used to represent the total concatenation of 851 * the `.init' and `.fini' sections. 852 * 853 * First, determine whether any .init or .fini sections exist. If these 854 * sections exist when a dynamic object is being built, but no `_init' 855 * or `_fini' symbols are found, then the user is probably building this 856 * object directly from ld(1) rather than using a compiler driver that 857 * provides the symbols via crt's. 858 * 859 * If the .init or .fini section exist, and their associated symbols, 860 * determine the size of the sections and updated the symbols value 861 * accordingly. 862 */ 863 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_INIT_U), SYM_NOHASH, 0, 864 ofl)) != NULL) && (sdp->sd_ref == REF_REL_NEED) && sdp->sd_isc && 865 (sdp->sd_isc->is_osdesc == iosp)) { 866 if (ld_sym_copy(sdp) == S_ERROR) 867 return ((Addr)S_ERROR); 868 sdp->sd_sym->st_size = 869 sdp->sd_isc->is_osdesc->os_shdr->sh_size; 870 } else if (iosp && !(flags & FLG_OF_RELOBJ)) { 871 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_SYM_NOCRT), 872 MSG_ORIG(MSG_SYM_INIT_U), MSG_ORIG(MSG_SCN_INIT)); 873 } 874 875 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_FINI_U), SYM_NOHASH, 0, 876 ofl)) != NULL) && (sdp->sd_ref == REF_REL_NEED) && sdp->sd_isc && 877 (sdp->sd_isc->is_osdesc == fosp)) { 878 if (ld_sym_copy(sdp) == S_ERROR) 879 return ((Addr)S_ERROR); 880 sdp->sd_sym->st_size = 881 sdp->sd_isc->is_osdesc->os_shdr->sh_size; 882 } else if (fosp && !(flags & FLG_OF_RELOBJ)) { 883 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_SYM_NOCRT), 884 MSG_ORIG(MSG_SYM_FINI_U), MSG_ORIG(MSG_SCN_FINI)); 885 } 886 887 /* 888 * Assign .bss information for use with updating COMMON symbols. 889 */ 890 if (ofl->ofl_isbss) { 891 osp = ofl->ofl_isbss->is_osdesc; 892 893 bssaddr = osp->os_shdr->sh_addr + 894 (Off)_elf_getxoff(ofl->ofl_isbss->is_indata); 895 /* LINTED */ 896 bssndx = elf_ndxscn(osp->os_scn); 897 } 898 899 #if (defined(__i386) || defined(__amd64)) && defined(_ELF64) 900 /* 901 * Assign .lbss information for use with updating LCOMMON symbols. 902 */ 903 if (ofl->ofl_islbss) { 904 osp = ofl->ofl_islbss->is_osdesc; 905 906 lbssaddr = osp->os_shdr->sh_addr + 907 (Off)_elf_getxoff(ofl->ofl_islbss->is_indata); 908 /* LINTED */ 909 lbssndx = elf_ndxscn(osp->os_scn); 910 } 911 #endif 912 913 /* 914 * Assign .tlsbss information for use with updating COMMON symbols. 915 */ 916 if (ofl->ofl_istlsbss) { 917 osp = ofl->ofl_istlsbss->is_osdesc; 918 tlsbssaddr = osp->os_shdr->sh_addr + 919 (Off)_elf_getxoff(ofl->ofl_istlsbss->is_indata); 920 /* LINTED */ 921 tlsbssndx = elf_ndxscn(osp->os_scn); 922 } 923 924 /* 925 * Assign .SUNWbss information for use with updating COMMON symbols. 926 */ 927 if (ofl->ofl_issunwbss) { 928 osp = ofl->ofl_issunwbss->is_osdesc; 929 sunwbssaddr = (Addr)(osp->os_shdr->sh_addr + 930 ofl->ofl_issunwbss->is_indata->d_off); 931 /* LINTED */ 932 sunwbssndx = elf_ndxscn(osp->os_scn); 933 } 934 935 936 if ((sorted_syms = libld_calloc(ofl->ofl_globcnt + 937 ofl->ofl_elimcnt + ofl->ofl_scopecnt, sizeof (*sorted_syms))) == 0) 938 return ((Addr)S_ERROR); 939 940 scndx = 0; 941 ssndx = ofl->ofl_scopecnt + ofl->ofl_elimcnt; 942 943 /* 944 * Traverse the internal symbol table updating information and 945 * allocating common. 946 */ 947 for (sav = avl_first(&ofl->ofl_symavl); sav; 948 sav = AVL_NEXT(&ofl->ofl_symavl, sav)) { 949 Sym * symptr; 950 int local; 951 int restore; 952 953 sdp = sav->sav_symdesc; 954 955 /* 956 * Ignore any symbols that have been marked as 957 * invalid during input processing. Providing 958 * these aren't used for relocation they'll 959 * just be dropped from the output image. 960 */ 961 if (sdp->sd_flags & FLG_SY_INVALID) { 962 DBG_CALL(Dbg_syms_old(ofl, sdp)); 963 DBG_CALL(Dbg_syms_ignore(ofl, sdp)); 964 continue; 965 } 966 967 /* 968 * Only needed symbols will be copied to the 969 * output symbol table. 970 */ 971 if (sdp->sd_ref == REF_DYN_SEEN) 972 continue; 973 974 if ((sdp->sd_flags1 & FLG_SY1_LOCL) && 975 (flags & FLG_OF_PROCRED)) 976 local = 1; 977 else 978 local = 0; 979 980 if (local || (ofl->ofl_hashbkts == 0)) { 981 sorted_syms[scndx++].sl_sdp = sdp; 982 } else { 983 sorted_syms[ssndx].sl_hval = sdp->sd_aux->sa_hash % 984 ofl->ofl_hashbkts; 985 sorted_syms[ssndx].sl_sdp = sdp; 986 ssndx++; 987 } 988 989 /* 990 * Note - expand the COMMON symbols here because an address 991 * must be assigned to them in the same order that space was 992 * calculated in sym_validate(). If this ordering isn't 993 * followed differing alignment requirements can throw us all 994 * out of whack. 995 * 996 * The expanded .bss global symbol is handled here as well. 997 * 998 * The actual adding entries into the symbol table still occurs 999 * below in hashbucket order. 1000 */ 1001 symptr = sdp->sd_sym; 1002 restore = 0; 1003 if ((sdp->sd_flags & FLG_SY_PAREXPN) || 1004 ((sdp->sd_flags & FLG_SY_SPECSEC) && 1005 (sdp->sd_shndx = symptr->st_shndx) == SHN_COMMON)) { 1006 1007 /* 1008 * An expanded symbol goes to .sunwdata1. 1009 * 1010 * A partial initialized global symbol within a shared 1011 * object goes to .sunwbss. 1012 * 1013 * Assign COMMON allocations to .bss. 1014 * 1015 * Otherwise leave it as is. 1016 */ 1017 if (sdp->sd_flags & FLG_SY_PAREXPN) { 1018 restore = 1; 1019 sdp->sd_shndx = sunwdata1ndx; 1020 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1021 symptr->st_value = (Xword) S_ROUND( 1022 sunwdata1addr, symptr->st_value); 1023 sunwdata1addr = symptr->st_value + 1024 symptr->st_size; 1025 sdp->sd_isc = ofl->ofl_issunwdata1; 1026 sdp->sd_flags |= FLG_SY_COMMEXP; 1027 1028 } else if ((sdp->sd_psyminfo != (Psym_info *)NULL) && 1029 (ofl->ofl_flags & FLG_OF_SHAROBJ) && 1030 (ELF_ST_BIND(symptr->st_info) != STB_LOCAL)) { 1031 restore = 1; 1032 sdp->sd_shndx = sunwbssndx; 1033 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1034 symptr->st_value = (Xword) 1035 S_ROUND(sunwbssaddr, symptr->st_value); 1036 sunwbssaddr = symptr->st_value + 1037 symptr->st_size; 1038 sdp->sd_isc = ofl->ofl_issunwbss; 1039 sdp->sd_flags |= FLG_SY_COMMEXP; 1040 1041 } else if (ELF_ST_TYPE(symptr->st_info) != STT_TLS && 1042 (local || !(flags & FLG_OF_RELOBJ))) { 1043 restore = 1; 1044 sdp->sd_shndx = bssndx; 1045 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1046 symptr->st_value = (Xword) S_ROUND(bssaddr, 1047 symptr->st_value); 1048 bssaddr = symptr->st_value + symptr->st_size; 1049 sdp->sd_isc = ofl->ofl_isbss; 1050 sdp->sd_flags |= FLG_SY_COMMEXP; 1051 1052 } else if (ELF_ST_TYPE(symptr->st_info) == STT_TLS && 1053 (local || !(flags & FLG_OF_RELOBJ))) { 1054 restore = 1; 1055 sdp->sd_shndx = tlsbssndx; 1056 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1057 symptr->st_value = (Xword)S_ROUND(tlsbssaddr, 1058 symptr->st_value); 1059 tlsbssaddr = symptr->st_value + symptr->st_size; 1060 sdp->sd_isc = ofl->ofl_istlsbss; 1061 sdp->sd_flags |= FLG_SY_COMMEXP; 1062 /* 1063 * TLS symbols are relative to the TLS segment. 1064 */ 1065 symptr->st_value -= ofl->ofl_tlsphdr->p_vaddr; 1066 } 1067 #if (defined(__i386) || defined(__amd64)) && defined(_ELF64) 1068 } else if ((sdp->sd_flags & FLG_SY_SPECSEC) && 1069 ((sdp->sd_shndx = symptr->st_shndx) == 1070 SHN_X86_64_LCOMMON) && 1071 ((local || !(flags & FLG_OF_RELOBJ)))) { 1072 restore = 1; 1073 sdp->sd_shndx = lbssndx; 1074 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1075 symptr->st_value = (Xword) S_ROUND(lbssaddr, 1076 symptr->st_value); 1077 lbssaddr = symptr->st_value + symptr->st_size; 1078 sdp->sd_isc = ofl->ofl_islbss; 1079 sdp->sd_flags |= FLG_SY_COMMEXP; 1080 #endif 1081 } 1082 1083 if (restore != 0) { 1084 uchar_t type, bind; 1085 1086 /* 1087 * Make sure this COMMON symbol is returned to the same 1088 * binding as was defined in the original relocatable 1089 * object reference. 1090 */ 1091 type = ELF_ST_TYPE(symptr->st_info); 1092 if (sdp->sd_flags & FLG_SY_GLOBREF) 1093 bind = STB_GLOBAL; 1094 else 1095 bind = STB_WEAK; 1096 1097 symptr->st_info = ELF_ST_INFO(bind, type); 1098 } 1099 } 1100 1101 if (ofl->ofl_hashbkts) { 1102 qsort(sorted_syms + ofl->ofl_scopecnt + ofl->ofl_elimcnt, 1103 ofl->ofl_globcnt, sizeof (Sym_s_list), 1104 (int (*)(const void *, const void *))sym_hash_compare); 1105 } 1106 1107 for (ssndx = 0; ssndx < (ofl->ofl_elimcnt + ofl->ofl_scopecnt + 1108 ofl->ofl_globcnt); ssndx++) { 1109 const char *name; 1110 Sym *sym; 1111 Sym_aux *sap; 1112 Half spec; 1113 int local = 0, dynlocal = 0, enter_in_symtab; 1114 Listnode *lnp2; 1115 Gotndx *gnp; 1116 Word sectndx; 1117 1118 sdp = sorted_syms[ssndx].sl_sdp; 1119 sectndx = 0; 1120 1121 if (symtab) 1122 enter_in_symtab = 1; 1123 else 1124 enter_in_symtab = 0; 1125 1126 /* 1127 * Assign a got offset if necessary. 1128 */ 1129 #if defined(sparc) || defined(__sparcv9) 1130 if (ld_assign_got(ofl, sdp) == S_ERROR) 1131 return ((Addr)S_ERROR); 1132 #elif defined(i386) || defined(__amd64) 1133 /* nothing to do */ 1134 #else 1135 #error Unknown architecture! 1136 #endif 1137 1138 if (DBG_ENABLED) { 1139 for (LIST_TRAVERSE(&sdp->sd_GOTndxs, lnp2, gnp)) { 1140 gottable->gt_sym = sdp; 1141 gottable->gt_gndx.gn_gotndx = gnp->gn_gotndx; 1142 gottable->gt_gndx.gn_addend = gnp->gn_addend; 1143 gottable++; 1144 } 1145 1146 if (sdp->sd_aux && sdp->sd_aux->sa_PLTGOTndx) { 1147 gottable->gt_sym = sdp; 1148 gottable->gt_gndx.gn_gotndx = 1149 sdp->sd_aux->sa_PLTGOTndx; 1150 gottable++; 1151 } 1152 } 1153 1154 1155 /* 1156 * If this symbol has been marked as being reduced to local 1157 * scope then it will have to be placed in the scoped portion 1158 * of the .symtab. Retain the appropriate index for use in 1159 * version symbol indexing and relocation. 1160 */ 1161 if ((sdp->sd_flags1 & FLG_SY1_LOCL) && 1162 (flags & FLG_OF_PROCRED)) { 1163 local = 1; 1164 if (!(sdp->sd_flags1 & FLG_SY1_ELIM) && !dynsym) 1165 sdp->sd_symndx = scopesym_ndx; 1166 else 1167 sdp->sd_symndx = 0; 1168 1169 if (sdp->sd_flags1 & FLG_SY1_ELIM) { 1170 enter_in_symtab = 0; 1171 } else if (ldynsym && sdp->sd_sym->st_name && 1172 ldynsym_symtype[ 1173 ELF_ST_TYPE(sdp->sd_sym->st_info)]) { 1174 dynlocal = 1; 1175 } 1176 } else { 1177 sdp->sd_symndx = *symndx; 1178 } 1179 1180 /* 1181 * Copy basic symbol and string information. 1182 */ 1183 name = sdp->sd_name; 1184 sap = sdp->sd_aux; 1185 1186 /* 1187 * If we require to record version symbol indexes, update the 1188 * associated version symbol information for all defined 1189 * symbols. If a version definition is required any zero value 1190 * symbol indexes would have been flagged as undefined symbol 1191 * errors, however if we're just scoping these need to fall into 1192 * the base of global symbols. 1193 */ 1194 if (sdp->sd_symndx && versym) { 1195 Half vndx = 0; 1196 1197 if (sdp->sd_flags & FLG_SY_MVTOCOMM) 1198 vndx = VER_NDX_GLOBAL; 1199 else if (sdp->sd_ref == REF_REL_NEED) { 1200 Half symflags1 = sdp->sd_flags1; 1201 1202 vndx = sap->sa_overndx; 1203 if ((vndx == 0) && 1204 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 1205 if (symflags1 & FLG_SY1_ELIM) 1206 vndx = VER_NDX_ELIMINATE; 1207 else if (symflags1 & FLG_SY1_LOCL) 1208 vndx = VER_NDX_LOCAL; 1209 else 1210 vndx = VER_NDX_GLOBAL; 1211 } 1212 } 1213 versym[sdp->sd_symndx] = vndx; 1214 } 1215 1216 /* 1217 * If we are creating the .syminfo section then set per symbol 1218 * flags here. 1219 */ 1220 if (sdp->sd_symndx && syminfo && 1221 !(sdp->sd_flags & FLG_SY_NOTAVAIL)) { 1222 int ndx = sdp->sd_symndx; 1223 List *sip = &(ofl->ofl_syminfsyms); 1224 1225 if (sdp->sd_flags & FLG_SY_MVTOCOMM) 1226 /* 1227 * Identify a copy relocation symbol. 1228 */ 1229 syminfo[ndx].si_flags |= SYMINFO_FLG_COPY; 1230 1231 if (sdp->sd_ref == REF_DYN_NEED) { 1232 /* 1233 * A reference is bound to a needed dependency. 1234 * Save this symbol descriptor, as its boundto 1235 * element will need updating after the .dynamic 1236 * section has been created. Flag whether this 1237 * reference is lazy loadable, and if a direct 1238 * binding is to be established. 1239 */ 1240 if (list_appendc(sip, sdp) == 0) 1241 return (0); 1242 1243 syminfo[ndx].si_flags |= SYMINFO_FLG_DIRECT; 1244 if (sdp->sd_flags & FLG_SY_LAZYLD) 1245 syminfo[ndx].si_flags |= 1246 SYMINFO_FLG_LAZYLOAD; 1247 1248 /* 1249 * Enable direct symbol bindings if: 1250 * 1251 * . Symbol was identified with the DIRECT 1252 * keyword in a mapfile. 1253 * 1254 * . Symbol reference has been bound to a 1255 * dependency which was specified as 1256 * requiring direct bindings with -zdirect. 1257 * 1258 * . All symbol references are required to 1259 * use direct bindings via -Bdirect. 1260 */ 1261 if (sdp->sd_flags1 & FLG_SY1_DIR) 1262 syminfo[ndx].si_flags |= 1263 SYMINFO_FLG_DIRECTBIND; 1264 1265 } else if ((sdp->sd_flags & FLG_SY_EXTERN) && 1266 (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 1267 /* 1268 * If this symbol has been explicitly defined 1269 * as external, and remains unresolved, mark 1270 * it as external. 1271 */ 1272 syminfo[ndx].si_boundto = SYMINFO_BT_EXTERN; 1273 1274 } else if ((sdp->sd_flags & FLG_SY_PARENT) && 1275 (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 1276 /* 1277 * If this symbol has been explicitly defined 1278 * to be a reference to a parent object, 1279 * indicate whether a direct binding should be 1280 * established. 1281 */ 1282 syminfo[ndx].si_flags |= SYMINFO_FLG_DIRECT; 1283 syminfo[ndx].si_boundto = SYMINFO_BT_PARENT; 1284 if (sdp->sd_flags1 & FLG_SY1_DIR) 1285 syminfo[ndx].si_flags |= 1286 SYMINFO_FLG_DIRECTBIND; 1287 1288 } else if (sdp->sd_flags & FLG_SY_STDFLTR) { 1289 /* 1290 * A filter definition. Although this symbol 1291 * can only be a stub, it might be necessary to 1292 * prevent external direct bindings. 1293 */ 1294 syminfo[ndx].si_flags |= SYMINFO_FLG_FILTER; 1295 if (sdp->sd_flags1 & FLG_SY1_NDIR) 1296 syminfo[ndx].si_flags |= 1297 SYMINFO_FLG_NOEXTDIRECT; 1298 1299 } else if (sdp->sd_flags & FLG_SY_AUXFLTR) { 1300 /* 1301 * An auxiliary filter definition. By nature, 1302 * this definition is direct, in that should the 1303 * filtee lookup fail, we'll fall back to this 1304 * object. It may still be necesssary to 1305 * prevent external direct bindings. 1306 */ 1307 syminfo[ndx].si_flags |= SYMINFO_FLG_AUXILIARY; 1308 if (sdp->sd_flags1 & FLG_SY1_NDIR) 1309 syminfo[ndx].si_flags |= 1310 SYMINFO_FLG_NOEXTDIRECT; 1311 1312 } else if ((sdp->sd_ref == REF_REL_NEED) && 1313 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 1314 1315 /* 1316 * This definition exists within the object 1317 * being created. Flag whether it is necessary 1318 * to prevent external direct bindings. 1319 */ 1320 if (sdp->sd_flags1 & FLG_SY1_NDIR) { 1321 syminfo[ndx].si_boundto = 1322 SYMINFO_BT_NONE; 1323 syminfo[ndx].si_flags |= 1324 SYMINFO_FLG_NOEXTDIRECT; 1325 } 1326 1327 /* 1328 * Indicate that this symbol is acting as an 1329 * individual interposer. 1330 */ 1331 if (sdp->sd_flags & FLG_SY_INTPOSE) { 1332 syminfo[ndx].si_flags |= 1333 SYMINFO_FLG_INTERPOSE; 1334 } 1335 1336 /* 1337 * If external bindings are allowed, or this is 1338 * a translator symbol, indicate the binding, 1339 * and a direct binding if necessary. 1340 */ 1341 if (((sdp->sd_flags1 & FLG_SY1_NDIR) == 0) || 1342 ((dtflags_1 & DF_1_TRANS) && sdp->sd_aux && 1343 sdp->sd_aux->sa_bindto)) { 1344 1345 syminfo[ndx].si_flags |= 1346 SYMINFO_FLG_DIRECT; 1347 1348 if (sdp->sd_flags1 & FLG_SY1_DIR) 1349 syminfo[ndx].si_flags |= 1350 SYMINFO_FLG_DIRECTBIND; 1351 1352 /* 1353 * If this is a translator, the symbols 1354 * boundto element will indicate the 1355 * dependency to which it should resolve 1356 * rather than itself. Save this info 1357 * for updating after the .dynamic 1358 * section has been created. 1359 */ 1360 if ((dtflags_1 & DF_1_TRANS) && 1361 sdp->sd_aux && 1362 sdp->sd_aux->sa_bindto) { 1363 if (list_appendc(sip, sdp) == 0) 1364 return (0); 1365 } else { 1366 syminfo[ndx].si_boundto = 1367 SYMINFO_BT_SELF; 1368 } 1369 } 1370 } 1371 } 1372 1373 /* 1374 * Note that the `sym' value is reset to be one of the new 1375 * symbol table entries. This symbol will be updated further 1376 * depending on the type of the symbol. Process the .symtab 1377 * first, followed by the .dynsym, thus the `sym' value will 1378 * remain as the .dynsym value when the .dynsym is present. 1379 * This ensures that any versioning symbols st_name value will 1380 * be appropriate for the string table used by version 1381 * entries. 1382 */ 1383 if (enter_in_symtab) { 1384 Word _symndx; 1385 1386 if (local) 1387 _symndx = scopesym_ndx; 1388 else 1389 _symndx = symtab_ndx; 1390 1391 symtab[_symndx] = *sdp->sd_sym; 1392 sdp->sd_sym = sym = &symtab[_symndx]; 1393 (void) st_setstring(strtab, name, &stoff); 1394 sym->st_name = stoff; 1395 } 1396 if (dynlocal) { 1397 ldynsym[ldynscopesym_ndx] = *sdp->sd_sym; 1398 sdp->sd_sym = sym = &ldynsym[ldynscopesym_ndx]; 1399 (void) st_setstring(dynstr, name, &stoff); 1400 ldynsym[ldynscopesym_ndx].st_name = stoff; 1401 /* Add it to sort section if it qualifies */ 1402 ADD_TO_DYNSORT(sdp, sym, ELF_ST_TYPE(sym->st_info), 1403 ldynscopesym_ndx); 1404 } 1405 1406 if (dynsym && !local) { 1407 dynsym[dynsym_ndx] = *sdp->sd_sym; 1408 /* 1409 * Provided this isn't an unnamed register symbol, 1410 * update its name and hash value. 1411 */ 1412 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 1413 dynsym[dynsym_ndx].st_name) { 1414 (void) st_setstring(dynstr, name, &stoff); 1415 dynsym[dynsym_ndx].st_name = stoff; 1416 if (stoff) { 1417 Word _hashndx; 1418 hashval = sap->sa_hash % ofl->ofl_hashbkts; 1419 /* LINTED */ 1420 if (_hashndx = hashbkt[hashval]) { 1421 while (hashchain[_hashndx]) 1422 _hashndx = hashchain[_hashndx]; 1423 hashchain[_hashndx] = sdp->sd_symndx; 1424 } else { 1425 hashbkt[hashval] = sdp->sd_symndx; 1426 } 1427 } 1428 } 1429 sdp->sd_sym = sym = &dynsym[dynsym_ndx]; 1430 /* 1431 * Add it to sort section if it qualifies. 1432 * The indexes in that section are relative to the 1433 * the adjacent SUNW_ldynsym/dymsym pair, so we 1434 * add the number of items in SUNW_ldynsym to the 1435 * dynsym index. 1436 */ 1437 ADD_TO_DYNSORT(sdp, sym, ELF_ST_TYPE(sym->st_info), 1438 ldynsym_cnt + dynsym_ndx); 1439 } 1440 if (!enter_in_symtab && (!dynsym || (local && !dynlocal))) { 1441 if (!(sdp->sd_flags & FLG_SY_UPREQD)) 1442 continue; 1443 sym = sdp->sd_sym; 1444 } else 1445 sdp->sd_flags &= ~FLG_SY_CLEAN; 1446 1447 1448 /* 1449 * If we have a weak data symbol for which we need the real 1450 * symbol also, save this processing until later. 1451 * 1452 * The exception to this is if the weak/strong have PLT's 1453 * assigned to them. In that case we don't do the post-weak 1454 * processing because the PLT's must be maintained so that we 1455 * can do 'interpositioning' on both of the symbols. 1456 */ 1457 if ((sap->sa_linkndx) && 1458 (ELF_ST_BIND(sym->st_info) == STB_WEAK) && 1459 (!sap->sa_PLTndx)) { 1460 Sym_desc * _sdp = 1461 sdp->sd_file->ifl_oldndx[sap->sa_linkndx]; 1462 1463 if (_sdp->sd_ref != REF_DYN_SEEN) { 1464 if ((wkp = 1465 libld_calloc(sizeof (Wk_desc), 1)) == 0) 1466 return ((Addr)S_ERROR); 1467 1468 if (enter_in_symtab) { 1469 if (local) 1470 wkp->wk_symtab = 1471 &symtab[scopesym_ndx]; 1472 else 1473 wkp->wk_symtab = 1474 &symtab[symtab_ndx]; 1475 } 1476 if (dynsym) { 1477 if (!local) { 1478 wkp->wk_dynsym = 1479 &dynsym[dynsym_ndx]; 1480 } else if (dynlocal) { 1481 wkp->wk_dynsym = 1482 &ldynsym[ldynscopesym_ndx]; 1483 } 1484 } 1485 wkp->wk_weak = sdp; 1486 wkp->wk_alias = _sdp; 1487 1488 if (!(list_appendc(&weak, wkp))) 1489 return ((Addr)S_ERROR); 1490 1491 if (enter_in_symtab) 1492 if (local) 1493 scopesym_ndx++; 1494 else 1495 symtab_ndx++; 1496 if (dynsym) { 1497 if (!local) { 1498 dynsym_ndx++; 1499 } else if (dynlocal) { 1500 ldynscopesym_ndx++; 1501 } 1502 } 1503 continue; 1504 } 1505 } 1506 1507 DBG_CALL(Dbg_syms_old(ofl, sdp)); 1508 1509 spec = NULL; 1510 /* 1511 * assign new symbol value. 1512 */ 1513 sectndx = sdp->sd_shndx; 1514 if (sectndx == SHN_UNDEF) { 1515 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) && 1516 (sym->st_value != 0)) { 1517 eprintf(ofl->ofl_lml, ERR_WARNING, 1518 MSG_INTL(MSG_SYM_NOTNULL), 1519 demangle(name), sdp->sd_file->ifl_name); 1520 } 1521 1522 /* 1523 * Undefined weak global, if we are generating a static 1524 * executable, output as an absolute zero. Otherwise 1525 * leave it as is, ld.so.1 will skip symbols of this 1526 * type (this technique allows applications and 1527 * libraries to test for the existence of a symbol as an 1528 * indication of the presence or absence of certain 1529 * functionality). 1530 */ 1531 if (((flags & (FLG_OF_STATIC | FLG_OF_EXEC)) == 1532 (FLG_OF_STATIC | FLG_OF_EXEC)) && 1533 (ELF_ST_BIND(sym->st_info) == STB_WEAK)) { 1534 sdp->sd_flags |= FLG_SY_SPECSEC; 1535 sdp->sd_shndx = sectndx = SHN_ABS; 1536 } 1537 } else if ((sdp->sd_flags & FLG_SY_SPECSEC) && 1538 (sectndx == SHN_COMMON)) { 1539 /* COMMONs have already been processed */ 1540 /* EMPTY */ 1541 ; 1542 } else { 1543 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 1544 (sectndx == SHN_ABS)) 1545 spec = sdp->sd_aux->sa_symspec; 1546 1547 /* LINTED */ 1548 if (sdp->sd_flags & FLG_SY_COMMEXP) { 1549 /* 1550 * This is (or was) a COMMON symbol which was 1551 * processed above - no processing 1552 * required here. 1553 */ 1554 ; 1555 } else if (sdp->sd_ref == REF_DYN_NEED) { 1556 uchar_t type, bind; 1557 1558 sectndx = SHN_UNDEF; 1559 sym->st_value = 0; 1560 sym->st_size = 0; 1561 1562 /* 1563 * Make sure this undefined symbol is returned 1564 * to the same binding as was defined in the 1565 * original relocatable object reference. 1566 */ 1567 type = ELF_ST_TYPE(sym-> st_info); 1568 if (sdp->sd_flags & FLG_SY_GLOBREF) 1569 bind = STB_GLOBAL; 1570 else 1571 bind = STB_WEAK; 1572 1573 sym->st_info = ELF_ST_INFO(bind, type); 1574 1575 } else if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1576 (sdp->sd_ref == REF_REL_NEED)) { 1577 osp = sdp->sd_isc->is_osdesc; 1578 /* LINTED */ 1579 sectndx = elf_ndxscn(osp->os_scn); 1580 1581 /* 1582 * In an executable, the new symbol value is the 1583 * old value (offset into defining section) plus 1584 * virtual address of defining section. In a 1585 * relocatable, the new value is the old value 1586 * plus the displacement of the section within 1587 * the file. 1588 */ 1589 /* LINTED */ 1590 sym->st_value += 1591 (Off)_elf_getxoff(sdp->sd_isc->is_indata); 1592 1593 if (!(flags & FLG_OF_RELOBJ)) { 1594 sym->st_value += osp->os_shdr->sh_addr; 1595 /* 1596 * TLS symbols are relative to 1597 * the TLS segment. 1598 */ 1599 if ((ELF_ST_TYPE(sym->st_info) == 1600 STT_TLS) && (ofl->ofl_tlsphdr)) 1601 sym->st_value -= 1602 ofl->ofl_tlsphdr->p_vaddr; 1603 } 1604 } 1605 } 1606 1607 if (spec) { 1608 switch (spec) { 1609 case SDAUX_ID_ETEXT: 1610 sym->st_value = etext; 1611 sectndx = etext_ndx; 1612 if (etext_abs) 1613 sdp->sd_flags |= FLG_SY_SPECSEC; 1614 else 1615 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1616 break; 1617 case SDAUX_ID_EDATA: 1618 sym->st_value = edata; 1619 sectndx = edata_ndx; 1620 if (edata_abs) 1621 sdp->sd_flags |= FLG_SY_SPECSEC; 1622 else 1623 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1624 break; 1625 case SDAUX_ID_END: 1626 sym->st_value = end; 1627 sectndx = end_ndx; 1628 if (end_abs) 1629 sdp->sd_flags |= FLG_SY_SPECSEC; 1630 else 1631 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1632 break; 1633 case SDAUX_ID_START: 1634 sym->st_value = start; 1635 sectndx = start_ndx; 1636 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1637 break; 1638 case SDAUX_ID_DYN: 1639 if (flags & FLG_OF_DYNAMIC) { 1640 sym->st_value = ofl-> 1641 ofl_osdynamic->os_shdr->sh_addr; 1642 /* LINTED */ 1643 sectndx = elf_ndxscn( 1644 ofl->ofl_osdynamic->os_scn); 1645 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1646 } 1647 break; 1648 case SDAUX_ID_PLT: 1649 if (ofl->ofl_osplt) { 1650 sym->st_value = ofl-> 1651 ofl_osplt->os_shdr->sh_addr; 1652 /* LINTED */ 1653 sectndx = elf_ndxscn( 1654 ofl->ofl_osplt->os_scn); 1655 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1656 } 1657 break; 1658 case SDAUX_ID_GOT: 1659 /* 1660 * Symbol bias for negative growing tables is 1661 * stored in symbol's value during 1662 * allocate_got(). 1663 */ 1664 sym->st_value += ofl-> 1665 ofl_osgot->os_shdr->sh_addr; 1666 /* LINTED */ 1667 sectndx = elf_ndxscn(ofl-> 1668 ofl_osgot->os_scn); 1669 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1670 break; 1671 default: 1672 /* NOTHING */ 1673 ; 1674 } 1675 } 1676 1677 /* 1678 * If a plt index has been assigned to an undefined function, 1679 * update the symbols value to the appropriate .plt address. 1680 */ 1681 if ((flags & FLG_OF_DYNAMIC) && (flags & FLG_OF_EXEC) && 1682 (sdp->sd_file) && 1683 (sdp->sd_file->ifl_ehdr->e_type == ET_DYN) && 1684 (ELF_ST_TYPE(sym->st_info) == STT_FUNC) && 1685 !(flags & FLG_OF_BFLAG)) { 1686 if (sap->sa_PLTndx) 1687 sym->st_value = ld_calc_plt_addr(sdp, ofl); 1688 } 1689 1690 /* 1691 * Finish updating the symbols. 1692 */ 1693 1694 /* 1695 * Sym Update: if scoped local - set local binding 1696 */ 1697 if (local) 1698 sym->st_info = ELF_ST_INFO(STB_LOCAL, 1699 ELF_ST_TYPE(sym->st_info)); 1700 1701 /* 1702 * Sym Updated: If both the .symtab and .dynsym 1703 * are present then we've actually updated the information in 1704 * the .dynsym, therefore copy this same information to the 1705 * .symtab entry. 1706 */ 1707 sdp->sd_shndx = sectndx; 1708 if (enter_in_symtab && dynsym && (!local || dynlocal)) { 1709 Word _symndx = dynlocal ? scopesym_ndx : symtab_ndx; 1710 1711 symtab[_symndx].st_value = sym->st_value; 1712 symtab[_symndx].st_size = sym->st_size; 1713 symtab[_symndx].st_info = sym->st_info; 1714 symtab[_symndx].st_other = sym->st_other; 1715 } 1716 1717 1718 if (enter_in_symtab) { 1719 Word _symndx; 1720 1721 if (local) 1722 _symndx = scopesym_ndx++; 1723 else 1724 _symndx = symtab_ndx++; 1725 if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1726 (sectndx >= SHN_LORESERVE)) { 1727 assert(symshndx != 0); 1728 symshndx[_symndx] = sectndx; 1729 symtab[_symndx].st_shndx = SHN_XINDEX; 1730 } else { 1731 /* LINTED */ 1732 symtab[_symndx].st_shndx = (Half)sectndx; 1733 } 1734 } 1735 1736 if (dynsym && (!local || dynlocal)) { 1737 /* 1738 * dynsym and ldynsym are distinct tables, so 1739 * we use indirection to access the right one 1740 * and the related extended section index array. 1741 */ 1742 Word _symndx; 1743 Sym *_dynsym; 1744 Word *_dynshndx; 1745 1746 if (!local) { 1747 _symndx = dynsym_ndx++; 1748 _dynsym = dynsym; 1749 _dynshndx = dynshndx; 1750 } else { 1751 _symndx = ldynscopesym_ndx++; 1752 _dynsym = ldynsym; 1753 _dynshndx = ldynshndx; 1754 } 1755 if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1756 (sectndx >= SHN_LORESERVE)) { 1757 assert(_dynshndx != 0); 1758 _dynshndx[_symndx] = sectndx; 1759 _dynsym[_symndx].st_shndx = SHN_XINDEX; 1760 } else { 1761 /* LINTED */ 1762 _dynsym[_symndx].st_shndx = (Half)sectndx; 1763 } 1764 } 1765 1766 DBG_CALL(Dbg_syms_new(ofl, sym, sdp)); 1767 } 1768 1769 /* 1770 * Now that all the symbols have been processed update any weak symbols 1771 * information (ie. copy all information except `st_name'). As both 1772 * symbols will be represented in the output, return the weak symbol to 1773 * its correct type. 1774 */ 1775 for (LIST_TRAVERSE(&weak, lnp1, wkp)) { 1776 Sym_desc * sdp, * _sdp; 1777 Sym * sym, * _sym, * __sym; 1778 uchar_t bind; 1779 1780 sdp = wkp->wk_weak; 1781 _sdp = wkp->wk_alias; 1782 _sym = _sdp->sd_sym; 1783 1784 sdp->sd_flags |= FLG_SY_WEAKDEF; 1785 1786 /* 1787 * If the symbol definition has been scoped then assign it to 1788 * be local, otherwise if it's from a shared object then we need 1789 * to maintain the binding of the original reference. 1790 */ 1791 if (sdp->sd_flags1 & FLG_SY1_LOCL) { 1792 if (flags & FLG_OF_PROCRED) 1793 bind = STB_LOCAL; 1794 else 1795 bind = STB_WEAK; 1796 } else if ((sdp->sd_ref == REF_DYN_NEED) && 1797 (sdp->sd_flags & FLG_SY_GLOBREF)) 1798 bind = STB_GLOBAL; 1799 else 1800 bind = STB_WEAK; 1801 1802 DBG_CALL(Dbg_syms_old(ofl, sdp)); 1803 if ((sym = wkp->wk_symtab) != 0) { 1804 sym = wkp->wk_symtab; 1805 sym->st_value = _sym->st_value; 1806 sym->st_size = _sym->st_size; 1807 sym->st_other = _sym->st_other; 1808 sym->st_shndx = _sym->st_shndx; 1809 sym->st_info = ELF_ST_INFO(bind, 1810 ELF_ST_TYPE(sym->st_info)); 1811 __sym = sym; 1812 } 1813 if ((sym = wkp->wk_dynsym) != 0) { 1814 sym = wkp->wk_dynsym; 1815 sym->st_value = _sym->st_value; 1816 sym->st_size = _sym->st_size; 1817 sym->st_other = _sym->st_other; 1818 sym->st_shndx = _sym->st_shndx; 1819 sym->st_info = ELF_ST_INFO(bind, 1820 ELF_ST_TYPE(sym->st_info)); 1821 __sym = sym; 1822 } 1823 DBG_CALL(Dbg_syms_new(ofl, __sym, sdp)); 1824 } 1825 1826 /* 1827 * Now display GOT debugging information if required. 1828 */ 1829 DBG_CALL(Dbg_got_display(ofl, 0, 0)); 1830 1831 /* 1832 * Update the section headers information. sh_info is 1833 * supposed to contain the offset at which the first 1834 * global symbol resides in the symbol table, while 1835 * sh_link contains the section index of the associated 1836 * string table. 1837 */ 1838 if (symtab) { 1839 Shdr * shdr = ofl->ofl_ossymtab->os_shdr; 1840 1841 shdr->sh_info = ofl->ofl_shdrcnt + ofl->ofl_locscnt + 1842 ofl->ofl_scopecnt + 2; 1843 /* LINTED */ 1844 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osstrtab->os_scn); 1845 if (symshndx) { 1846 shdr = ofl->ofl_ossymshndx->os_shdr; 1847 shdr->sh_link = 1848 (Word)elf_ndxscn(ofl->ofl_ossymtab->os_scn); 1849 } 1850 } 1851 if (dynsym) { 1852 Shdr * shdr = ofl->ofl_osdynsym->os_shdr; 1853 1854 shdr->sh_info = 1 + ofl->ofl_dynshdrcnt + ofl->ofl_lregsymcnt; 1855 /* LINTED */ 1856 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 1857 1858 ofl->ofl_oshash->os_shdr->sh_link = 1859 /* LINTED */ 1860 (Word)elf_ndxscn(ofl->ofl_osdynsym->os_scn); 1861 if (dynshndx) { 1862 shdr = ofl->ofl_osdynshndx->os_shdr; 1863 shdr->sh_link = 1864 (Word)elf_ndxscn(ofl->ofl_osdynsym->os_scn); 1865 } 1866 } 1867 if (ldynsym) { 1868 Shdr * shdr = ofl->ofl_osldynsym->os_shdr; 1869 1870 /* ldynsym has no globals, so give index one past the end */ 1871 shdr->sh_info = ldynsym_ndx; 1872 1873 /* 1874 * The ldynsym and dynsym must be adjacent. The 1875 * idea is that rtld should be able to start with 1876 * the ldynsym and march straight through the end 1877 * of dynsym, seeing them as a single symbol table, 1878 * despite the fact that they are in distinct sections. 1879 * Ensure that this happened correctly. 1880 * 1881 * Note that I use ldynsym_ndx here instead of the 1882 * computation I used to set the section size 1883 * (found in ldynsym_cnt). The two will agree, unless 1884 * we somehow miscounted symbols or failed to insert them 1885 * all. Using ldynsym_ndx here catches that error in 1886 * addition to checking for adjacency. 1887 */ 1888 assert(dynsym == (ldynsym + ldynsym_ndx)); 1889 1890 1891 /* LINTED */ 1892 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 1893 1894 if (ldynshndx) { 1895 shdr = ofl->ofl_osldynshndx->os_shdr; 1896 shdr->sh_link = 1897 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 1898 } 1899 1900 /* 1901 * The presence of .SUNW_ldynsym means that there may be 1902 * associated sort sections, one for regular symbols 1903 * and the other for TLS. Each sort section needs the 1904 * following done: 1905 * - Section header link references .SUNW_ldynsym 1906 * - Should have received the expected # of items 1907 * - Sorted by increasing address 1908 */ 1909 if (ofl->ofl_osdynsymsort) { /* .SUNW_dynsymsort */ 1910 ofl->ofl_osdynsymsort->os_shdr->sh_link = 1911 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 1912 assert(ofl->ofl_dynsymsortcnt == dynsymsort_ndx); 1913 if (dynsymsort_ndx > 1) { 1914 dynsort_compare_syms = ldynsym; 1915 qsort(dynsymsort, dynsymsort_ndx, 1916 sizeof (*dynsymsort), dynsort_compare); 1917 dynsort_dupwarn(ofl, ldynsym, dynstr->st_strbuf, 1918 dynsymsort, dynsymsort_ndx, 1919 MSG_ORIG(MSG_SCN_DYNSYMSORT)); 1920 } 1921 } 1922 if (ofl->ofl_osdyntlssort) { /* .SUNW_dyntlssort */ 1923 ofl->ofl_osdyntlssort->os_shdr->sh_link = 1924 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 1925 assert(ofl->ofl_dyntlssortcnt == dyntlssort_ndx); 1926 if (dyntlssort_ndx > 1) { 1927 dynsort_compare_syms = ldynsym; 1928 qsort(dyntlssort, dyntlssort_ndx, 1929 sizeof (*dyntlssort), dynsort_compare); 1930 dynsort_dupwarn(ofl, ldynsym, dynstr->st_strbuf, 1931 dyntlssort, dyntlssort_ndx, 1932 MSG_ORIG(MSG_SCN_DYNTLSSORT)); 1933 } 1934 } 1935 } 1936 1937 /* 1938 * Used by ld.so.1 only. 1939 */ 1940 return (etext); 1941 1942 #undef ADD_TO_DYNSORT 1943 } 1944 1945 /* 1946 * Build the dynamic section. 1947 */ 1948 static int 1949 update_odynamic(Ofl_desc *ofl) 1950 { 1951 Listnode *lnp; 1952 Ifl_desc *ifl; 1953 Sym_desc *sdp; 1954 Shdr *shdr; 1955 Dyn *_dyn = (Dyn *)ofl->ofl_osdynamic->os_outdata->d_buf; 1956 Dyn *dyn; 1957 Str_tbl *dynstr; 1958 uint_t stoff; 1959 Word flags = ofl->ofl_flags; 1960 1961 dynstr = ofl->ofl_dynstrtab; 1962 ofl->ofl_osdynamic->os_shdr->sh_link = 1963 /* LINTED */ 1964 (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 1965 1966 dyn = _dyn; 1967 1968 for (LIST_TRAVERSE(&ofl->ofl_sos, lnp, ifl)) { 1969 if ((ifl->ifl_flags & 1970 (FLG_IF_IGNORE | FLG_IF_DEPREQD)) == FLG_IF_IGNORE) 1971 continue; 1972 1973 /* 1974 * Create and set up the DT_POSFLAG_1 entry here if required. 1975 */ 1976 if ((ifl->ifl_flags & (FLG_IF_LAZYLD|FLG_IF_GRPPRM)) && 1977 (ifl->ifl_flags & (FLG_IF_NEEDED))) { 1978 dyn->d_tag = DT_POSFLAG_1; 1979 if (ifl->ifl_flags & FLG_IF_LAZYLD) 1980 dyn->d_un.d_val = DF_P1_LAZYLOAD; 1981 if (ifl->ifl_flags & FLG_IF_GRPPRM) 1982 dyn->d_un.d_val |= DF_P1_GROUPPERM; 1983 dyn++; 1984 } 1985 1986 if (ifl->ifl_flags & (FLG_IF_NEEDED | FLG_IF_NEEDSTR)) 1987 dyn->d_tag = DT_NEEDED; 1988 else 1989 continue; 1990 1991 (void) st_setstring(dynstr, ifl->ifl_soname, &stoff); 1992 dyn->d_un.d_val = stoff; 1993 /* LINTED */ 1994 ifl->ifl_neededndx = (Half)(((uintptr_t)dyn - (uintptr_t)_dyn) / 1995 sizeof (Dyn)); 1996 dyn++; 1997 } 1998 1999 if (ofl->ofl_dtsfltrs) { 2000 Dfltr_desc * dftp; 2001 Aliste off; 2002 2003 for (ALIST_TRAVERSE(ofl->ofl_dtsfltrs, off, dftp)) { 2004 if (dftp->dft_flag == FLG_SY_AUXFLTR) 2005 dyn->d_tag = DT_SUNW_AUXILIARY; 2006 else 2007 dyn->d_tag = DT_SUNW_FILTER; 2008 2009 (void) st_setstring(dynstr, dftp->dft_str, &stoff); 2010 dyn->d_un.d_val = stoff; 2011 dftp->dft_ndx = (Half)(((uintptr_t)dyn - 2012 (uintptr_t)_dyn) / sizeof (Dyn)); 2013 dyn++; 2014 } 2015 } 2016 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_INIT_U), 2017 SYM_NOHASH, 0, ofl)) != NULL) && 2018 sdp->sd_ref == REF_REL_NEED) { 2019 dyn->d_tag = DT_INIT; 2020 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2021 dyn++; 2022 } 2023 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_FINI_U), 2024 SYM_NOHASH, 0, ofl)) != NULL) && 2025 sdp->sd_ref == REF_REL_NEED) { 2026 dyn->d_tag = DT_FINI; 2027 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2028 dyn++; 2029 } 2030 if (ofl->ofl_soname) { 2031 dyn->d_tag = DT_SONAME; 2032 (void) st_setstring(dynstr, ofl->ofl_soname, &stoff); 2033 dyn->d_un.d_val = stoff; 2034 dyn++; 2035 } 2036 if (ofl->ofl_filtees) { 2037 if (flags & FLG_OF_AUX) { 2038 dyn->d_tag = DT_AUXILIARY; 2039 } else { 2040 dyn->d_tag = DT_FILTER; 2041 } 2042 (void) st_setstring(dynstr, ofl->ofl_filtees, &stoff); 2043 dyn->d_un.d_val = stoff; 2044 dyn++; 2045 } 2046 if (ofl->ofl_rpath) { 2047 (void) st_setstring(dynstr, ofl->ofl_rpath, &stoff); 2048 dyn->d_tag = DT_RUNPATH; 2049 dyn->d_un.d_val = stoff; 2050 dyn++; 2051 dyn->d_tag = DT_RPATH; 2052 dyn->d_un.d_val = stoff; 2053 dyn++; 2054 } 2055 if (ofl->ofl_config) { 2056 dyn->d_tag = DT_CONFIG; 2057 (void) st_setstring(dynstr, ofl->ofl_config, &stoff); 2058 dyn->d_un.d_val = stoff; 2059 dyn++; 2060 } 2061 if (ofl->ofl_depaudit) { 2062 dyn->d_tag = DT_DEPAUDIT; 2063 (void) st_setstring(dynstr, ofl->ofl_depaudit, &stoff); 2064 dyn->d_un.d_val = stoff; 2065 dyn++; 2066 } 2067 if (ofl->ofl_audit) { 2068 dyn->d_tag = DT_AUDIT; 2069 (void) st_setstring(dynstr, ofl->ofl_audit, &stoff); 2070 dyn->d_un.d_val = stoff; 2071 dyn++; 2072 } 2073 2074 /* 2075 * The following DT_* entries do not apply to relocatable objects. 2076 */ 2077 if (!(flags & FLG_OF_RELOBJ)) { 2078 2079 dyn->d_tag = DT_HASH; 2080 dyn->d_un.d_ptr = ofl->ofl_oshash->os_shdr->sh_addr; 2081 dyn++; 2082 2083 shdr = ofl->ofl_osdynstr->os_shdr; 2084 dyn->d_tag = DT_STRTAB; 2085 dyn->d_un.d_ptr = shdr->sh_addr; 2086 dyn++; 2087 2088 dyn->d_tag = DT_STRSZ; 2089 dyn->d_un.d_ptr = shdr->sh_size; 2090 dyn++; 2091 2092 shdr = ofl->ofl_osdynsym->os_shdr; 2093 dyn->d_tag = DT_SYMTAB; 2094 dyn->d_un.d_ptr = shdr->sh_addr; 2095 dyn++; 2096 2097 dyn->d_tag = DT_SYMENT; 2098 dyn->d_un.d_ptr = shdr->sh_entsize; 2099 dyn++; 2100 2101 if (ofl->ofl_osldynsym) { 2102 /* 2103 * We have arranged for the .SUNW_ldynsym data to be 2104 * immediately in front of the .dynsym data. 2105 * This means that you could start at the top 2106 * of .SUNW_ldynsym and see the data for both tables 2107 * without a break. This is the view we want to 2108 * provide for DT_SUNW_SYMTAB, which is why we 2109 * add the lengths together. 2110 */ 2111 Shdr *lshdr = ofl->ofl_osldynsym->os_shdr; 2112 dyn->d_tag = DT_SUNW_SYMTAB; 2113 dyn->d_un.d_ptr = lshdr->sh_addr; 2114 dyn++; 2115 2116 dyn->d_tag = DT_SUNW_SYMSZ; 2117 dyn->d_un.d_val = lshdr->sh_size + shdr->sh_size; 2118 dyn++; 2119 } 2120 2121 if (ofl->ofl_osdynsymsort || ofl->ofl_osdyntlssort) { 2122 dyn->d_tag = DT_SUNW_SORTENT; 2123 dyn->d_un.d_val = sizeof (Word); 2124 dyn++; 2125 } 2126 2127 if (ofl->ofl_osdynsymsort) { 2128 dyn->d_tag = DT_SUNW_SYMSORT; 2129 dyn->d_un.d_ptr = 2130 ofl->ofl_osdynsymsort->os_shdr->sh_addr; 2131 dyn++; 2132 2133 dyn->d_tag = DT_SUNW_SYMSORTSZ; 2134 dyn->d_un.d_val = 2135 ofl->ofl_osdynsymsort->os_shdr->sh_size; 2136 dyn++; 2137 } 2138 2139 if (ofl->ofl_osdyntlssort) { 2140 dyn->d_tag = DT_SUNW_TLSSORT; 2141 dyn->d_un.d_ptr = 2142 ofl->ofl_osdyntlssort->os_shdr->sh_addr; 2143 dyn++; 2144 2145 dyn->d_tag = DT_SUNW_TLSSORTSZ; 2146 dyn->d_un.d_val = 2147 ofl->ofl_osdyntlssort->os_shdr->sh_size; 2148 dyn++; 2149 } 2150 2151 /* 2152 * Reserve the DT_CHECKSUM entry. Its value will be filled in 2153 * after the complete image is built. 2154 */ 2155 dyn->d_tag = DT_CHECKSUM; 2156 ofl->ofl_checksum = &dyn->d_un.d_val; 2157 dyn++; 2158 2159 if ((flags & (FLG_OF_VERDEF | FLG_OF_NOVERSEC)) == 2160 FLG_OF_VERDEF) { 2161 shdr = ofl->ofl_osverdef->os_shdr; 2162 dyn->d_tag = DT_VERDEF; 2163 dyn->d_un.d_ptr = shdr->sh_addr; 2164 dyn++; 2165 dyn->d_tag = DT_VERDEFNUM; 2166 dyn->d_un.d_ptr = shdr->sh_info; 2167 dyn++; 2168 } 2169 if ((flags & (FLG_OF_VERNEED | FLG_OF_NOVERSEC)) == 2170 FLG_OF_VERNEED) { 2171 shdr = ofl->ofl_osverneed->os_shdr; 2172 dyn->d_tag = DT_VERNEED; 2173 dyn->d_un.d_ptr = shdr->sh_addr; 2174 dyn++; 2175 dyn->d_tag = DT_VERNEEDNUM; 2176 dyn->d_un.d_ptr = shdr->sh_info; 2177 dyn++; 2178 } 2179 if ((ofl->ofl_flags1 & FLG_OF1_RELCNT) && 2180 ofl->ofl_relocrelcnt) { 2181 dyn->d_tag = M_REL_DT_COUNT; 2182 dyn->d_un.d_val = ofl->ofl_relocrelcnt; 2183 dyn++; 2184 } 2185 if (flags & FLG_OF_TEXTREL) { 2186 /* 2187 * Only the presence of this entry is used in this 2188 * implementation, not the value stored. 2189 */ 2190 dyn->d_tag = DT_TEXTREL; 2191 dyn->d_un.d_val = 0; 2192 dyn++; 2193 } 2194 2195 if (ofl->ofl_osfiniarray) { 2196 shdr = ofl->ofl_osfiniarray->os_shdr; 2197 2198 dyn->d_tag = DT_FINI_ARRAY; 2199 dyn->d_un.d_ptr = shdr->sh_addr; 2200 dyn++; 2201 2202 dyn->d_tag = DT_FINI_ARRAYSZ; 2203 dyn->d_un.d_val = shdr->sh_size; 2204 dyn++; 2205 } 2206 2207 if (ofl->ofl_osinitarray) { 2208 shdr = ofl->ofl_osinitarray->os_shdr; 2209 2210 dyn->d_tag = DT_INIT_ARRAY; 2211 dyn->d_un.d_ptr = shdr->sh_addr; 2212 dyn++; 2213 2214 dyn->d_tag = DT_INIT_ARRAYSZ; 2215 dyn->d_un.d_val = shdr->sh_size; 2216 dyn++; 2217 } 2218 2219 if (ofl->ofl_ospreinitarray) { 2220 shdr = ofl->ofl_ospreinitarray->os_shdr; 2221 2222 dyn->d_tag = DT_PREINIT_ARRAY; 2223 dyn->d_un.d_ptr = shdr->sh_addr; 2224 dyn++; 2225 2226 dyn->d_tag = DT_PREINIT_ARRAYSZ; 2227 dyn->d_un.d_val = shdr->sh_size; 2228 dyn++; 2229 } 2230 2231 if (ofl->ofl_pltcnt) { 2232 shdr = ofl->ofl_osplt->os_relosdesc->os_shdr; 2233 2234 dyn->d_tag = DT_PLTRELSZ; 2235 dyn->d_un.d_ptr = shdr->sh_size; 2236 dyn++; 2237 dyn->d_tag = DT_PLTREL; 2238 dyn->d_un.d_ptr = M_REL_DT_TYPE; 2239 dyn++; 2240 dyn->d_tag = DT_JMPREL; 2241 dyn->d_un.d_ptr = shdr->sh_addr; 2242 dyn++; 2243 } 2244 if (ofl->ofl_pltpad) { 2245 shdr = ofl->ofl_osplt->os_shdr; 2246 2247 dyn->d_tag = DT_PLTPAD; 2248 if (ofl->ofl_pltcnt) 2249 dyn->d_un.d_ptr = shdr->sh_addr + 2250 M_PLT_RESERVSZ + 2251 ofl->ofl_pltcnt * M_PLT_ENTSIZE; 2252 else 2253 dyn->d_un.d_ptr = shdr->sh_addr; 2254 dyn++; 2255 dyn->d_tag = DT_PLTPADSZ; 2256 dyn->d_un.d_val = ofl->ofl_pltpad * 2257 M_PLT_ENTSIZE; 2258 dyn++; 2259 } 2260 if (ofl->ofl_relocsz) { 2261 dyn->d_tag = M_REL_DT_TYPE; 2262 dyn->d_un.d_ptr = ofl->ofl_osrelhead->os_shdr->sh_addr; 2263 dyn++; 2264 dyn->d_tag = M_REL_DT_SIZE; 2265 dyn->d_un.d_ptr = ofl->ofl_relocsz; 2266 dyn++; 2267 dyn->d_tag = M_REL_DT_ENT; 2268 if (ofl->ofl_osrelhead->os_shdr->sh_type == SHT_REL) 2269 dyn->d_un.d_ptr = sizeof (Rel); 2270 else 2271 dyn->d_un.d_ptr = sizeof (Rela); 2272 dyn++; 2273 } 2274 if (ofl->ofl_ossyminfo) { 2275 shdr = ofl->ofl_ossyminfo->os_shdr; 2276 dyn->d_tag = DT_SYMINFO; 2277 dyn->d_un.d_ptr = shdr->sh_addr; 2278 dyn++; 2279 dyn->d_tag = DT_SYMINSZ; 2280 dyn->d_un.d_val = shdr->sh_size; 2281 dyn++; 2282 dyn->d_tag = DT_SYMINENT; 2283 dyn->d_un.d_val = sizeof (Syminfo); 2284 dyn++; 2285 } 2286 if (ofl->ofl_osmove) { 2287 Os_desc * osp; 2288 2289 dyn->d_tag = DT_MOVEENT; 2290 osp = ofl->ofl_osmove; 2291 dyn->d_un.d_val = osp->os_shdr->sh_entsize; 2292 dyn++; 2293 dyn->d_tag = DT_MOVESZ; 2294 dyn->d_un.d_val = osp->os_shdr->sh_size; 2295 dyn++; 2296 dyn->d_tag = DT_MOVETAB; 2297 dyn->d_un.d_val = osp->os_shdr->sh_addr; 2298 dyn++; 2299 } 2300 if (ofl->ofl_regsymcnt) { 2301 int ndx; 2302 2303 for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 2304 if ((sdp = ofl->ofl_regsyms[ndx]) == 0) 2305 continue; 2306 2307 dyn->d_tag = M_DT_REGISTER; 2308 dyn->d_un.d_val = sdp->sd_symndx; 2309 dyn++; 2310 } 2311 } 2312 2313 for (LIST_TRAVERSE(&ofl->ofl_rtldinfo, lnp, sdp)) { 2314 dyn->d_tag = DT_SUNW_RTLDINF; 2315 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2316 dyn++; 2317 } 2318 2319 if (ofl->ofl_osdynamic->os_sgdesc && 2320 (ofl->ofl_osdynamic->os_sgdesc->sg_phdr.p_flags & PF_W)) { 2321 if (ofl->ofl_osinterp) { 2322 dyn->d_tag = DT_DEBUG; 2323 dyn->d_un.d_ptr = 0; 2324 dyn++; 2325 } 2326 2327 dyn->d_tag = DT_FEATURE_1; 2328 if (ofl->ofl_osmove) 2329 dyn->d_un.d_val = 0; 2330 else 2331 dyn->d_un.d_val = DTF_1_PARINIT; 2332 dyn++; 2333 } 2334 2335 if (ofl->ofl_oscap) { 2336 dyn->d_tag = DT_SUNW_CAP; 2337 dyn->d_un.d_val = ofl->ofl_oscap->os_shdr->sh_addr; 2338 dyn++; 2339 } 2340 } 2341 2342 if (flags & FLG_OF_SYMBOLIC) { 2343 dyn->d_tag = DT_SYMBOLIC; 2344 dyn->d_un.d_val = 0; 2345 dyn++; 2346 } 2347 dyn->d_tag = DT_FLAGS; 2348 dyn->d_un.d_val = ofl->ofl_dtflags; 2349 dyn++; 2350 2351 /* 2352 * If -Bdirect was specified, but some NODIRECT symbols were specified 2353 * via a mapfile, or -znodirect was used on the command line, then 2354 * clear the DF_1_DIRECT flag. The resultant object will use per-symbol 2355 * direct bindings rather than be enabled for global direct bindings. 2356 */ 2357 if (ofl->ofl_flags1 & FLG_OF1_NDIRECT) 2358 ofl->ofl_dtflags_1 &= ~DF_1_DIRECT; 2359 2360 dyn->d_tag = DT_FLAGS_1; 2361 dyn->d_un.d_val = ofl->ofl_dtflags_1; 2362 dyn++; 2363 2364 ld_mach_update_odynamic(ofl, &dyn); 2365 2366 dyn->d_tag = DT_NULL; 2367 dyn->d_un.d_val = 0; 2368 2369 return (1); 2370 } 2371 2372 /* 2373 * Build the version definition section 2374 */ 2375 static int 2376 update_overdef(Ofl_desc *ofl) 2377 { 2378 Listnode *lnp1, *lnp2; 2379 Ver_desc *vdp, *_vdp; 2380 Verdef *vdf, *_vdf; 2381 int num = 0; 2382 Os_desc *strosp, *symosp; 2383 2384 /* 2385 * Traverse the version descriptors and update the version structures 2386 * to point to the dynstr name in preparation for building the version 2387 * section structure. 2388 */ 2389 for (LIST_TRAVERSE(&ofl->ofl_verdesc, lnp1, vdp)) { 2390 Sym_desc * sdp; 2391 2392 if (vdp->vd_flags & VER_FLG_BASE) { 2393 const char *name = vdp->vd_name; 2394 uint_t stoff; 2395 2396 /* 2397 * Create a new string table entry to represent the base 2398 * version name (there is no corresponding symbol for 2399 * this). 2400 */ 2401 if (!(ofl->ofl_flags & FLG_OF_DYNAMIC)) { 2402 (void) st_setstring(ofl->ofl_strtab, 2403 name, &stoff); 2404 /* LINTED */ 2405 vdp->vd_name = (const char *)(uintptr_t)stoff; 2406 } else { 2407 (void) st_setstring(ofl->ofl_dynstrtab, 2408 name, &stoff); 2409 /* LINTED */ 2410 vdp->vd_name = (const char *)(uintptr_t)stoff; 2411 } 2412 } else { 2413 sdp = ld_sym_find(vdp->vd_name, vdp->vd_hash, 0, ofl); 2414 /* LINTED */ 2415 vdp->vd_name = (const char *) 2416 (uintptr_t)sdp->sd_sym->st_name; 2417 } 2418 } 2419 2420 _vdf = vdf = (Verdef *)ofl->ofl_osverdef->os_outdata->d_buf; 2421 2422 /* 2423 * Traverse the version descriptors and update the version section to 2424 * reflect each version and its associated dependencies. 2425 */ 2426 for (LIST_TRAVERSE(&ofl->ofl_verdesc, lnp1, vdp)) { 2427 Half cnt = 1; 2428 Verdaux * vdap, * _vdap; 2429 2430 _vdap = vdap = (Verdaux *)(vdf + 1); 2431 2432 vdf->vd_version = VER_DEF_CURRENT; 2433 vdf->vd_flags = vdp->vd_flags & MSK_VER_USER; 2434 vdf->vd_ndx = vdp->vd_ndx; 2435 vdf->vd_hash = vdp->vd_hash; 2436 2437 /* LINTED */ 2438 vdap->vda_name = (uintptr_t)vdp->vd_name; 2439 vdap++; 2440 /* LINTED */ 2441 _vdap->vda_next = (Word)((uintptr_t)vdap - (uintptr_t)_vdap); 2442 2443 /* 2444 * Traverse this versions dependency list generating the 2445 * appropriate version dependency entries. 2446 */ 2447 for (LIST_TRAVERSE(&vdp->vd_deps, lnp2, _vdp)) { 2448 /* LINTED */ 2449 vdap->vda_name = (uintptr_t)_vdp->vd_name; 2450 _vdap = vdap; 2451 vdap++, cnt++; 2452 /* LINTED */ 2453 _vdap->vda_next = (Word)((uintptr_t)vdap - 2454 (uintptr_t)_vdap); 2455 } 2456 _vdap->vda_next = 0; 2457 2458 /* 2459 * Record the versions auxiliary array offset and the associated 2460 * dependency count. 2461 */ 2462 /* LINTED */ 2463 vdf->vd_aux = (Word)((uintptr_t)(vdf + 1) - (uintptr_t)vdf); 2464 vdf->vd_cnt = cnt; 2465 2466 /* 2467 * Record the next versions offset and update the version 2468 * pointer. Remember the previous version offset as the very 2469 * last structures next pointer should be null. 2470 */ 2471 _vdf = vdf; 2472 vdf = (Verdef *)vdap, num++; 2473 /* LINTED */ 2474 _vdf->vd_next = (Word)((uintptr_t)vdf - (uintptr_t)_vdf); 2475 } 2476 _vdf->vd_next = 0; 2477 2478 /* 2479 * Record the string table association with the version definition 2480 * section, and the symbol table associated with the version symbol 2481 * table (the actual contents of the version symbol table are filled 2482 * in during symbol update). 2483 */ 2484 if ((ofl->ofl_flags & FLG_OF_RELOBJ) || 2485 (ofl->ofl_flags & FLG_OF_STATIC)) { 2486 strosp = ofl->ofl_osstrtab; 2487 symosp = ofl->ofl_ossymtab; 2488 } else { 2489 strosp = ofl->ofl_osdynstr; 2490 symosp = ofl->ofl_osdynsym; 2491 } 2492 /* LINTED */ 2493 ofl->ofl_osverdef->os_shdr->sh_link = (Word)elf_ndxscn(strosp->os_scn); 2494 /* LINTED */ 2495 ofl->ofl_osversym->os_shdr->sh_link = (Word)elf_ndxscn(symosp->os_scn); 2496 2497 /* 2498 * The version definition sections `info' field is used to indicate the 2499 * number of entries in this section. 2500 */ 2501 ofl->ofl_osverdef->os_shdr->sh_info = num; 2502 2503 return (1); 2504 } 2505 2506 /* 2507 * Build the version needed section 2508 */ 2509 static int 2510 update_overneed(Ofl_desc *ofl) 2511 { 2512 Listnode *lnp; 2513 Ifl_desc *ifl; 2514 Verneed *vnd, *_vnd; 2515 Str_tbl *dynstr; 2516 Word num = 0, cnt = 0; 2517 2518 dynstr = ofl->ofl_dynstrtab; 2519 _vnd = vnd = (Verneed *)ofl->ofl_osverneed->os_outdata->d_buf; 2520 2521 /* 2522 * Traverse the shared object list looking for dependencies that have 2523 * versions defined within them. 2524 */ 2525 for (LIST_TRAVERSE(&ofl->ofl_sos, lnp, ifl)) { 2526 Half _cnt; 2527 Vernaux *_vnap, *vnap; 2528 Sdf_desc *sdf = ifl->ifl_sdfdesc; 2529 uint_t stoff; 2530 2531 if (!(ifl->ifl_flags & FLG_IF_VERNEED)) 2532 continue; 2533 2534 vnd->vn_version = VER_NEED_CURRENT; 2535 2536 (void) st_setstring(dynstr, ifl->ifl_soname, &stoff); 2537 vnd->vn_file = stoff; 2538 2539 _vnap = vnap = (Vernaux *)(vnd + 1); 2540 2541 if (sdf && (sdf->sdf_flags & FLG_SDF_SPECVER)) { 2542 Sdv_desc * sdv; 2543 Listnode * lnp2; 2544 2545 /* 2546 * If version needed definitions were specified in 2547 * a mapfile ($VERSION=*) then record those 2548 * definitions. 2549 */ 2550 for (LIST_TRAVERSE(&sdf->sdf_verneed, lnp2, sdv)) { 2551 (void) st_setstring(dynstr, 2552 sdv->sdv_name, &stoff); 2553 vnap->vna_name = stoff; 2554 /* LINTED */ 2555 vnap->vna_hash = (Word)elf_hash(sdv->sdv_name); 2556 vnap->vna_flags = 0; 2557 vnap->vna_other = 0; 2558 _vnap = vnap; 2559 vnap++; 2560 cnt++; 2561 /* LINTED */ 2562 _vnap->vna_next = (Word)((uintptr_t)vnap - 2563 (uintptr_t)_vnap); 2564 } 2565 } else { 2566 2567 /* 2568 * Traverse the version index list recording 2569 * each version as a needed dependency. 2570 */ 2571 for (cnt = _cnt = 0; _cnt <= ifl->ifl_vercnt; 2572 _cnt++) { 2573 Ver_index * vip = &ifl->ifl_verndx[_cnt]; 2574 2575 if (vip->vi_flags & FLG_VER_REFER) { 2576 (void) st_setstring(dynstr, 2577 vip->vi_name, &stoff); 2578 vnap->vna_name = stoff; 2579 if (vip->vi_desc) { 2580 vnap->vna_hash = 2581 vip->vi_desc->vd_hash; 2582 vnap->vna_flags = 2583 vip->vi_desc->vd_flags; 2584 } else { 2585 vnap->vna_hash = 0; 2586 vnap->vna_flags = 0; 2587 } 2588 vnap->vna_other = 0; 2589 2590 _vnap = vnap; 2591 vnap++, cnt++; 2592 _vnap->vna_next = 2593 /* LINTED */ 2594 (Word)((uintptr_t)vnap - 2595 (uintptr_t)_vnap); 2596 } 2597 } 2598 } 2599 _vnap->vna_next = 0; 2600 2601 /* 2602 * Record the versions auxiliary array offset and 2603 * the associated dependency count. 2604 */ 2605 /* LINTED */ 2606 vnd->vn_aux = (Word)((uintptr_t)(vnd + 1) - (uintptr_t)vnd); 2607 /* LINTED */ 2608 vnd->vn_cnt = (Half)cnt; 2609 2610 /* 2611 * Record the next versions offset and update the version 2612 * pointer. Remember the previous version offset as the very 2613 * last structures next pointer should be null. 2614 */ 2615 _vnd = vnd; 2616 vnd = (Verneed *)vnap, num++; 2617 /* LINTED */ 2618 _vnd->vn_next = (Word)((uintptr_t)vnd - (uintptr_t)_vnd); 2619 } 2620 _vnd->vn_next = 0; 2621 2622 /* 2623 * Record association on string table section and use the 2624 * `info' field to indicate the number of entries in this 2625 * section. 2626 */ 2627 ofl->ofl_osverneed->os_shdr->sh_link = 2628 /* LINTED */ 2629 (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 2630 ofl->ofl_osverneed->os_shdr->sh_info = num; 2631 2632 return (1); 2633 } 2634 2635 2636 /* 2637 * Update syminfo section. 2638 */ 2639 static uintptr_t 2640 update_osyminfo(Ofl_desc * ofl) 2641 { 2642 Os_desc * symosp, * infosp = ofl->ofl_ossyminfo; 2643 Syminfo * sip = infosp->os_outdata->d_buf; 2644 Shdr * shdr = infosp->os_shdr; 2645 char *strtab; 2646 Listnode * lnp; 2647 Sym_desc * sdp; 2648 Aliste off; 2649 Sfltr_desc * sftp; 2650 2651 if (ofl->ofl_flags & FLG_OF_RELOBJ) { 2652 symosp = ofl->ofl_ossymtab; 2653 strtab = ofl->ofl_osstrtab->os_outdata->d_buf; 2654 } else { 2655 symosp = ofl->ofl_osdynsym; 2656 strtab = ofl->ofl_osdynstr->os_outdata->d_buf; 2657 } 2658 2659 /* LINTED */ 2660 infosp->os_shdr->sh_link = (Word)elf_ndxscn(symosp->os_scn); 2661 if (ofl->ofl_osdynamic) 2662 infosp->os_shdr->sh_info = 2663 /* LINTED */ 2664 (Word)elf_ndxscn(ofl->ofl_osdynamic->os_scn); 2665 2666 /* 2667 * Update any references with the index into the dynamic table. 2668 */ 2669 for (LIST_TRAVERSE(&ofl->ofl_syminfsyms, lnp, sdp)) { 2670 Ifl_desc * ifl; 2671 if (sdp->sd_aux && sdp->sd_aux->sa_bindto) 2672 ifl = sdp->sd_aux->sa_bindto; 2673 else 2674 ifl = sdp->sd_file; 2675 sip[sdp->sd_symndx].si_boundto = ifl->ifl_neededndx; 2676 } 2677 2678 /* 2679 * Update any filtee references with the index into the dynamic table. 2680 */ 2681 for (ALIST_TRAVERSE(ofl->ofl_symfltrs, off, sftp)) { 2682 Dfltr_desc * dftp; 2683 2684 /* LINTED */ 2685 dftp = (Dfltr_desc *)((char *)ofl->ofl_dtsfltrs + 2686 sftp->sft_off); 2687 sip[sftp->sft_sdp->sd_symndx].si_boundto = dftp->dft_ndx; 2688 } 2689 2690 /* 2691 * Display debugging information about section. 2692 */ 2693 DBG_CALL(Dbg_syminfo_title(ofl->ofl_lml)); 2694 if (DBG_ENABLED) { 2695 Word _cnt, cnt = shdr->sh_size / shdr->sh_entsize; 2696 Sym * symtab = symosp->os_outdata->d_buf; 2697 Dyn * dyn; 2698 2699 if (ofl->ofl_osdynamic) 2700 dyn = ofl->ofl_osdynamic->os_outdata->d_buf; 2701 else 2702 dyn = 0; 2703 2704 for (_cnt = 1; _cnt < cnt; _cnt++) { 2705 if (sip[_cnt].si_flags || sip[_cnt].si_boundto) 2706 /* LINTED */ 2707 DBG_CALL(Dbg_syminfo_entry(ofl->ofl_lml, _cnt, 2708 &sip[_cnt], &symtab[_cnt], strtab, dyn)); 2709 } 2710 } 2711 return (1); 2712 } 2713 2714 /* 2715 * Build the output elf header. 2716 */ 2717 static uintptr_t 2718 update_oehdr(Ofl_desc * ofl) 2719 { 2720 Ehdr *ehdr = ofl->ofl_nehdr; 2721 2722 /* 2723 * If an entry point symbol has already been established (refer 2724 * sym_validate()) simply update the elf header entry point with the 2725 * symbols value. If no entry point is defined it will have been filled 2726 * with the start address of the first section within the text segment 2727 * (refer update_outfile()). 2728 */ 2729 if (ofl->ofl_entry) 2730 ehdr->e_entry = 2731 ((Sym_desc *)(ofl->ofl_entry))->sd_sym->st_value; 2732 2733 /* 2734 * Note. it may be necessary to update the `e_flags' field in the 2735 * machine dependent section. 2736 */ 2737 ehdr->e_ident[EI_DATA] = M_DATA; 2738 ehdr->e_machine = ofl->ofl_dehdr->e_machine; 2739 ehdr->e_flags = ofl->ofl_dehdr->e_flags; 2740 ehdr->e_version = ofl->ofl_dehdr->e_version; 2741 2742 if (ehdr->e_machine != M_MACH) { 2743 if (ehdr->e_machine != M_MACHPLUS) 2744 return (S_ERROR); 2745 if ((ehdr->e_flags & M_FLAGSPLUS) == 0) 2746 return (S_ERROR); 2747 } 2748 2749 if (ofl->ofl_flags & FLG_OF_SHAROBJ) 2750 ehdr->e_type = ET_DYN; 2751 else if (ofl->ofl_flags & FLG_OF_RELOBJ) 2752 ehdr->e_type = ET_REL; 2753 else 2754 ehdr->e_type = ET_EXEC; 2755 2756 return (1); 2757 } 2758 2759 /* 2760 * Perform move table expansion. 2761 */ 2762 static uintptr_t 2763 expand_move(Ofl_desc *ofl, Sym_desc *sdp, Move *u1) 2764 { 2765 Move *mv; 2766 Os_desc *osp; 2767 unsigned char *taddr, *taddr0; 2768 Sxword offset; 2769 int i; 2770 Addr base1; 2771 unsigned int stride; 2772 2773 osp = ofl->ofl_issunwdata1->is_osdesc; 2774 base1 = (Addr)(osp->os_shdr->sh_addr + 2775 ofl->ofl_issunwdata1->is_indata->d_off); 2776 taddr0 = taddr = osp->os_outdata->d_buf; 2777 mv = u1; 2778 2779 offset = sdp->sd_sym->st_value - base1; 2780 taddr += offset; 2781 taddr = taddr + mv->m_poffset; 2782 for (i = 0; i < mv->m_repeat; i++) { 2783 /* LINTED */ 2784 DBG_CALL(Dbg_move_expand(ofl->ofl_lml, mv, 2785 (Addr)(taddr - taddr0))); 2786 stride = (unsigned int)mv->m_stride + 1; 2787 /* LINTED */ 2788 switch (ELF_M_SIZE(mv->m_info)) { 2789 case 1: 2790 /* LINTED */ 2791 *taddr = (unsigned char)mv->m_value; 2792 taddr += stride; 2793 break; 2794 case 2: 2795 /* LINTED */ 2796 *((Half *)taddr) = (Half)mv->m_value; 2797 taddr += 2*stride; 2798 break; 2799 case 4: 2800 /* LINTED */ 2801 *((Word *)taddr) = (Word)mv->m_value; 2802 taddr += 4*stride; 2803 break; 2804 case 8: 2805 /* LINTED */ 2806 *((unsigned long long *)taddr) = 2807 mv->m_value; 2808 taddr += 8*stride; 2809 break; 2810 default: 2811 /* 2812 * Should never come here since this is already 2813 * checked at sunwmove_preprocess(). 2814 */ 2815 return (S_ERROR); 2816 } 2817 } 2818 return (1); 2819 } 2820 2821 /* 2822 * Update Move sections. 2823 */ 2824 static uintptr_t 2825 update_move(Ofl_desc *ofl) 2826 { 2827 Word ndx = 0; 2828 Is_desc * isp; 2829 Word flags = ofl->ofl_flags; 2830 Move * mv1, * mv2; 2831 Listnode * lnp1; 2832 Psym_info * psym; 2833 2834 /* 2835 * Determine the index of the symbol table that will be referenced by 2836 * the relocation entries. 2837 */ 2838 if (OFL_ALLOW_DYNSYM(ofl)) 2839 /* LINTED */ 2840 ndx = (Word) elf_ndxscn(ofl->ofl_osdynsym->os_scn); 2841 else if (!(flags & FLG_OF_STRIP) || (flags & FLG_OF_RELOBJ)) 2842 /* LINTED */ 2843 ndx = (Word) elf_ndxscn(ofl->ofl_ossymtab->os_scn); 2844 2845 /* 2846 * update sh_link and mv pointer for updating move table. 2847 */ 2848 if (ofl->ofl_osmove) { 2849 ofl->ofl_osmove->os_shdr->sh_link = ndx; 2850 mv1 = (Move *) ofl->ofl_osmove->os_outdata->d_buf; 2851 } 2852 2853 /* 2854 * Update symbol entry index 2855 */ 2856 for (LIST_TRAVERSE(&ofl->ofl_parsym, lnp1, psym)) { 2857 Listnode * lnp2; 2858 Mv_itm * mvp; 2859 Sym_desc *sdp; 2860 2861 /* 2862 * Expand move table 2863 */ 2864 if (psym->psym_symd->sd_flags & FLG_SY_PAREXPN) { 2865 const char *s; 2866 2867 if (ofl->ofl_flags & FLG_OF_STATIC) 2868 s = MSG_INTL(MSG_PSYM_EXPREASON1); 2869 else if (ofl->ofl_flags1 & FLG_OF1_NOPARTI) 2870 s = MSG_INTL(MSG_PSYM_EXPREASON2); 2871 else 2872 s = MSG_INTL(MSG_PSYM_EXPREASON3); 2873 DBG_CALL(Dbg_move_parexpn(ofl->ofl_lml, 2874 psym->psym_symd->sd_name, s)); 2875 for (LIST_TRAVERSE(&(psym->psym_mvs), lnp2, mvp)) { 2876 if ((mvp->mv_flag & FLG_MV_OUTSECT) == 0) 2877 continue; 2878 mv2 = mvp->mv_ientry; 2879 sdp = psym->psym_symd; 2880 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 0, 2881 mv2, sdp)); 2882 (void) expand_move(ofl, sdp, mv2); 2883 } 2884 continue; 2885 } 2886 2887 /* 2888 * Process move table 2889 */ 2890 DBG_CALL(Dbg_move_outmove(ofl->ofl_lml, 2891 psym->psym_symd->sd_name)); 2892 for (LIST_TRAVERSE(&(psym->psym_mvs), lnp2, mvp)) { 2893 int idx = 1; 2894 if ((mvp->mv_flag & FLG_MV_OUTSECT) == 0) 2895 continue; 2896 isp = mvp->mv_isp; 2897 mv2 = mvp->mv_ientry; 2898 sdp = isp->is_file->ifl_oldndx[ 2899 ELF_M_SYM(mv2->m_info)]; 2900 2901 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 0, mv2, sdp)); 2902 *mv1 = *mv2; 2903 if ((ofl->ofl_flags & FLG_OF_RELOBJ) == 0) { 2904 if (ELF_ST_BIND(sdp->sd_sym->st_info) == 2905 STB_LOCAL) { 2906 Half symbssndx = 2907 ofl->ofl_isbss->is_osdesc->os_scnsymndx; 2908 mv1->m_info = 2909 /* LINTED */ 2910 ELF_M_INFO(symbssndx, mv2->m_info); 2911 if (ELF_ST_TYPE(sdp->sd_sym->st_info) != 2912 STT_SECTION) { 2913 mv1->m_poffset = sdp->sd_sym->st_value - 2914 ofl->ofl_isbss-> 2915 is_osdesc->os_shdr->sh_addr + 2916 mv2->m_poffset; 2917 } 2918 } else { 2919 mv1->m_info = 2920 /* LINTED */ 2921 ELF_M_INFO(sdp->sd_symndx, mv2->m_info); 2922 } 2923 } else { 2924 Boolean isredloc = FALSE; 2925 2926 if ((ELF_ST_BIND(sdp->sd_sym->st_info) == 2927 STB_LOCAL) && 2928 (ofl->ofl_flags1 & FLG_OF1_REDLSYM)) 2929 isredloc = TRUE; 2930 2931 if (isredloc && !(sdp->sd_psyminfo)) { 2932 Word symndx = 2933 sdp->sd_isc->is_osdesc->os_scnsymndx; 2934 mv1->m_info = 2935 /* LINTED */ 2936 ELF_M_INFO(symndx, mv2->m_info); 2937 mv1->m_poffset += sdp->sd_sym->st_value; 2938 } else { 2939 if (isredloc) 2940 DBG_CALL(Dbg_syms_reduce(ofl, 2941 DBG_SYM_REDUCE_RETAIN, sdp, 2942 idx, ofl->ofl_osmove->os_name)); 2943 2944 mv1->m_info = 2945 /* LINTED */ 2946 ELF_M_INFO(sdp->sd_symndx, mv2->m_info); 2947 } 2948 } 2949 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 1, mv1, sdp)); 2950 mv1++; 2951 idx++; 2952 } 2953 } 2954 return (1); 2955 } 2956 2957 2958 /* 2959 * Scan through the SHT_GROUP output sections. Update their 2960 * sh_link/sh_info fields as well as the section contents. 2961 */ 2962 static uintptr_t 2963 update_ogroup(Ofl_desc * ofl) 2964 { 2965 Listnode *lnp; 2966 Os_desc *osp; 2967 uintptr_t error = 0; 2968 2969 for (LIST_TRAVERSE(&ofl->ofl_osgroups, lnp, osp)) { 2970 Is_desc *isp; 2971 Ifl_desc *ifl; 2972 Shdr *shdr = osp->os_shdr; 2973 Sym_desc *sdp; 2974 Xword i, grpcnt; 2975 Word *gdata; 2976 2977 /* 2978 * Since input GROUP sections always create unique 2979 * output GROUP sections - we know there is only one 2980 * item on the list. 2981 */ 2982 isp = (Is_desc *)osp->os_isdescs.head->data; 2983 2984 ifl = isp->is_file; 2985 sdp = ifl->ifl_oldndx[isp->is_shdr->sh_info]; 2986 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_ossymtab->os_scn); 2987 shdr->sh_info = sdp->sd_symndx; 2988 2989 /* 2990 * Scan through the group data section and update 2991 * all of the links to new values. 2992 */ 2993 grpcnt = shdr->sh_size / shdr->sh_entsize; 2994 gdata = (Word *)osp->os_outdata->d_buf; 2995 for (i = 1; i < grpcnt; i++) { 2996 Is_desc * _isp; 2997 Os_desc * _osp; 2998 2999 /* 3000 * Perform a sanity check that the section index 3001 * stored in the SHT_GROUP section is valid 3002 * for the file it came from. 3003 */ 3004 if (gdata[i] >= ifl->ifl_shnum) { 3005 eprintf(ofl->ofl_lml, ERR_FATAL, 3006 MSG_INTL(MSG_GRP_INVALNDX), isp->is_name, 3007 ifl->ifl_name, i, gdata[i]); 3008 error = S_ERROR; 3009 gdata[i] = 0; 3010 continue; 3011 } 3012 3013 _isp = ifl->ifl_isdesc[gdata[i]]; 3014 3015 /* 3016 * If the referenced section didn't make it to the 3017 * output file - just zero out the entry. 3018 */ 3019 if ((_osp = _isp->is_osdesc) == 0) 3020 gdata[i] = 0; 3021 else 3022 gdata[i] = (Word)elf_ndxscn(_osp->os_scn); 3023 } 3024 } 3025 return (error); 3026 } 3027 3028 static void 3029 update_ostrtab(Os_desc *osp, Str_tbl *stp) 3030 { 3031 Elf_Data *data; 3032 if (osp == 0) 3033 return; 3034 3035 data = osp->os_outdata; 3036 assert(data->d_size == st_getstrtab_sz(stp)); 3037 (void) st_setstrbuf(stp, data->d_buf, (uint_t)data->d_size); 3038 } 3039 3040 /* 3041 * Translate the shdr->sh_{link, info} from its input section value to that 3042 * of the corresponding shdr->sh_{link, info} output section value. 3043 */ 3044 static Word 3045 translate_link(Ofl_desc *ofl, Os_desc *osp, Word link, const char *msg) 3046 { 3047 Is_desc * isp; 3048 Ifl_desc * ifl; 3049 3050 /* 3051 * Don't translate the special section numbers. 3052 */ 3053 if (link >= SHN_LORESERVE) 3054 return (link); 3055 3056 /* 3057 * Does this output section translate back to an input file. If not 3058 * then there is no translation to do. In this case we will assume that 3059 * if sh_link has a value, it's the right value. 3060 */ 3061 isp = (Is_desc *)osp->os_isdescs.head->data; 3062 if ((ifl = isp->is_file) == NULL) 3063 return (link); 3064 3065 /* 3066 * Sanity check to make sure that the sh_{link, info} value 3067 * is within range for the input file. 3068 */ 3069 if (link >= ifl->ifl_shnum) { 3070 eprintf(ofl->ofl_lml, ERR_WARNING, msg, ifl->ifl_name, 3071 isp->is_name, EC_XWORD(link)); 3072 return (link); 3073 } 3074 3075 /* 3076 * Follow the link to the input section. 3077 */ 3078 if ((isp = ifl->ifl_isdesc[link]) == 0) 3079 return (0); 3080 if ((osp = isp->is_osdesc) == 0) 3081 return (0); 3082 3083 /* LINTED */ 3084 return ((Word)elf_ndxscn(osp->os_scn)); 3085 } 3086 3087 /* 3088 * Having created all of the necessary sections, segments, and associated 3089 * headers, fill in the program headers and update any other data in the 3090 * output image. Some general rules: 3091 * 3092 * o If an interpreter is required always generate a PT_PHDR entry as 3093 * well. It is this entry that triggers the kernel into passing the 3094 * interpreter an aux vector instead of just a file descriptor. 3095 * 3096 * o When generating an image that will be interpreted (ie. a dynamic 3097 * executable, a shared object, or a static executable that has been 3098 * provided with an interpreter - weird, but possible), make the initial 3099 * loadable segment include both the ehdr and phdr[]. Both of these 3100 * tables are used by the interpreter therefore it seems more intuitive 3101 * to explicitly defined them as part of the mapped image rather than 3102 * relying on page rounding by the interpreter to allow their access. 3103 * 3104 * o When generating a static image that does not require an interpreter 3105 * have the first loadable segment indicate the address of the first 3106 * .section as the start address (things like /kernel/unix and ufsboot 3107 * expect this behavior). 3108 */ 3109 uintptr_t 3110 ld_update_outfile(Ofl_desc *ofl) 3111 { 3112 Addr size, etext, vaddr = ofl->ofl_segorigin; 3113 Listnode *lnp1, *lnp2; 3114 Sg_desc *sgp; 3115 Os_desc **ospp, *osp; 3116 int phdrndx = 0, capndx = 0, segndx = -1, secndx; 3117 Ehdr *ehdr = ofl->ofl_nehdr; 3118 Shdr *hshdr; 3119 Phdr *_phdr = 0, *dtracephdr = 0; 3120 Word phdrsz = ehdr->e_phnum *ehdr->e_phentsize, shscnndx; 3121 Word flags = ofl->ofl_flags, ehdrsz = ehdr->e_ehsize; 3122 Boolean nobits; 3123 Off offset; 3124 Aliste off; 3125 3126 /* 3127 * Loop through the segment descriptors and pick out what we need. 3128 */ 3129 DBG_CALL(Dbg_seg_title(ofl->ofl_lml)); 3130 for (LIST_TRAVERSE(&ofl->ofl_segs, lnp1, sgp)) { 3131 Phdr * phdr = &(sgp->sg_phdr); 3132 Xword p_align; 3133 3134 segndx++; 3135 3136 /* 3137 * If an interpreter is required generate a PT_INTERP and 3138 * PT_PHDR program header entry. The PT_PHDR entry describes 3139 * the program header table itself. This information will be 3140 * passed via the aux vector to the interpreter (ld.so.1). 3141 * The program header array is actually part of the first 3142 * loadable segment (and the PT_PHDR entry is the first entry), 3143 * therefore its virtual address isn't known until the first 3144 * loadable segment is processed. 3145 */ 3146 if (phdr->p_type == PT_PHDR) { 3147 if (ofl->ofl_osinterp) { 3148 phdr->p_offset = ehdr->e_phoff; 3149 phdr->p_filesz = phdr->p_memsz = phdrsz; 3150 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3151 ofl->ofl_phdr[phdrndx++] = *phdr; 3152 } 3153 continue; 3154 } 3155 if (phdr->p_type == PT_INTERP) { 3156 if (ofl->ofl_osinterp) { 3157 Shdr * shdr = ofl->ofl_osinterp->os_shdr; 3158 3159 phdr->p_vaddr = phdr->p_memsz = 0; 3160 phdr->p_offset = shdr->sh_offset; 3161 phdr->p_filesz = shdr->sh_size; 3162 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3163 ofl->ofl_phdr[phdrndx++] = *phdr; 3164 } 3165 continue; 3166 } 3167 3168 /* 3169 * If we are creating a PT_SUNWDTRACE segment, 3170 * just remember where the program header is. 3171 * 3172 * It's actual values will be assigned after 3173 * update_osym() has completed and the symbol 3174 * table addresses have been udpated. 3175 */ 3176 if (phdr->p_type == PT_SUNWDTRACE) { 3177 if ((ofl->ofl_dtracesym) && 3178 ((flags & FLG_OF_RELOBJ) == 0)) { 3179 dtracephdr = &ofl->ofl_phdr[phdrndx]; 3180 ofl->ofl_phdr[phdrndx++] = *phdr; 3181 } 3182 continue; 3183 } 3184 3185 /* 3186 * If a hardware/software capabilities section is required, 3187 * generate the PT_SUNWCAP header. Note, as this comes before 3188 * the first loadable segment, we don't yet know its real 3189 * virtual address. This is updated later. 3190 */ 3191 if (phdr->p_type == PT_SUNWCAP) { 3192 if (ofl->ofl_oscap) { 3193 Shdr * shdr = ofl->ofl_oscap->os_shdr; 3194 3195 phdr->p_vaddr = shdr->sh_addr; 3196 phdr->p_offset = shdr->sh_offset; 3197 phdr->p_filesz = shdr->sh_size; 3198 phdr->p_flags = PF_R; 3199 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3200 capndx = phdrndx; 3201 ofl->ofl_phdr[phdrndx++] = *phdr; 3202 } 3203 continue; 3204 } 3205 3206 /* 3207 * As the dynamic program header occurs after the loadable 3208 * headers in the segment descriptor table, all the address 3209 * information for the .dynamic output section will have been 3210 * figured out by now. 3211 */ 3212 if (phdr->p_type == PT_DYNAMIC) { 3213 if (OFL_ALLOW_DYNSYM(ofl)) { 3214 Shdr * shdr = ofl->ofl_osdynamic->os_shdr; 3215 3216 phdr->p_vaddr = shdr->sh_addr; 3217 phdr->p_offset = shdr->sh_offset; 3218 phdr->p_filesz = shdr->sh_size; 3219 phdr->p_flags = M_DATASEG_PERM; 3220 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3221 ofl->ofl_phdr[phdrndx++] = *phdr; 3222 } 3223 continue; 3224 } 3225 #if defined(__x86) && defined(_ELF64) 3226 if (phdr->p_type == PT_SUNW_UNWIND) { 3227 Shdr *shdr; 3228 if (ofl->ofl_unwindhdr == 0) 3229 continue; 3230 shdr = ofl->ofl_unwindhdr->os_shdr; 3231 3232 phdr->p_flags = PF_R; 3233 phdr->p_vaddr = shdr->sh_addr; 3234 phdr->p_memsz = shdr->sh_size; 3235 phdr->p_filesz = shdr->sh_size; 3236 phdr->p_offset = shdr->sh_offset; 3237 phdr->p_align = shdr->sh_addralign; 3238 phdr->p_paddr = 0; 3239 ofl->ofl_phdr[phdrndx++] = *phdr; 3240 continue; 3241 } 3242 #endif 3243 if (phdr->p_type == PT_TLS) { 3244 Os_desc *tlsosp; 3245 Shdr *firstshdr = 0, *lastfilshdr, *lastmemshdr; 3246 3247 if (ofl->ofl_ostlsseg.head == NULL) 3248 continue; 3249 3250 for (LIST_TRAVERSE(&ofl->ofl_ostlsseg, lnp2, tlsosp)) { 3251 Shdr *tlsshdr = tlsosp->os_shdr; 3252 3253 if (firstshdr == 0) { 3254 firstshdr = lastfilshdr = lastmemshdr = 3255 tlsosp->os_shdr; 3256 continue; 3257 } 3258 3259 if (tlsshdr->sh_type == SHT_NOBITS) 3260 lastmemshdr = tlsshdr; 3261 else 3262 lastfilshdr = tlsshdr; 3263 } 3264 3265 phdr->p_flags = PF_R | PF_W; 3266 phdr->p_vaddr = firstshdr->sh_addr; 3267 phdr->p_offset = firstshdr->sh_offset; 3268 phdr->p_align = firstshdr->sh_addralign; 3269 phdr->p_filesz = lastfilshdr->sh_offset + 3270 lastfilshdr->sh_size - phdr->p_offset; 3271 phdr->p_memsz = lastmemshdr->sh_offset + 3272 lastmemshdr->sh_size - phdr->p_offset; 3273 3274 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3275 3276 ofl->ofl_tlsphdr = phdr; 3277 ofl->ofl_phdr[phdrndx++] = *phdr; 3278 continue; 3279 } 3280 3281 /* 3282 * If this is an empty segment declaration, it will occur after 3283 * all other loadable segments, make sure the previous segment 3284 * doesn't overlap. We do not do the check if we are generating 3285 * a relocatable file. 3286 */ 3287 if (!(ofl->ofl_flags & FLG_OF_RELOBJ) && 3288 (sgp->sg_flags & FLG_SG_EMPTY)) { 3289 int i; 3290 Addr v_e; 3291 3292 vaddr = phdr->p_vaddr; 3293 phdr->p_memsz = sgp->sg_length; 3294 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3295 ofl->ofl_phdr[phdrndx++] = *phdr; 3296 3297 if (phdr->p_type != PT_LOAD) 3298 continue; 3299 3300 v_e = vaddr + phdr->p_memsz; 3301 /* 3302 * Check overlaps 3303 */ 3304 for (i = 0; i < phdrndx - 1; i++) { 3305 Addr p_s = (ofl->ofl_phdr[i]).p_vaddr; 3306 Addr p_e; 3307 3308 if ((ofl->ofl_phdr[i]).p_type != PT_LOAD) 3309 continue; 3310 3311 p_e = p_s + (ofl->ofl_phdr[i]).p_memsz; 3312 if (((p_s <= vaddr) && (p_e > vaddr)) || 3313 ((vaddr <= p_s) && (v_e > p_s))) 3314 eprintf(ofl->ofl_lml, ERR_WARNING, 3315 MSG_INTL(MSG_UPD_SEGOVERLAP), 3316 ofl->ofl_name, EC_ADDR(p_e), 3317 sgp->sg_name, EC_ADDR(vaddr)); 3318 } 3319 continue; 3320 } 3321 3322 /* 3323 * Having processed any of the special program headers any 3324 * remaining headers will be built to express individual 3325 * segments. Segments are only built if they have output 3326 * section descriptors associated with them (ie. some form of 3327 * input section has been matched to this segment). 3328 */ 3329 if (sgp->sg_osdescs == NULL) 3330 continue; 3331 3332 /* 3333 * Determine the segments offset and size from the section 3334 * information provided from elf_update(). 3335 * Allow for multiple NOBITS sections. 3336 */ 3337 osp = (Os_desc *)sgp->sg_osdescs->al_data[0]; 3338 hshdr = osp->os_shdr; 3339 3340 phdr->p_filesz = 0; 3341 phdr->p_memsz = 0; 3342 phdr->p_offset = offset = hshdr->sh_offset; 3343 3344 nobits = ((hshdr->sh_type == SHT_NOBITS) && 3345 ((sgp->sg_flags & FLG_SG_PHREQ) == 0)); 3346 3347 for (ALIST_TRAVERSE(sgp->sg_osdescs, off, ospp)) { 3348 Shdr *shdr; 3349 3350 osp = *ospp; 3351 shdr = osp->os_shdr; 3352 3353 p_align = 0; 3354 if (shdr->sh_addralign > p_align) 3355 p_align = shdr->sh_addralign; 3356 3357 offset = (Off)S_ROUND(offset, shdr->sh_addralign); 3358 offset += shdr->sh_size; 3359 3360 if (shdr->sh_type != SHT_NOBITS) { 3361 if (nobits) { 3362 eprintf(ofl->ofl_lml, ERR_FATAL, 3363 MSG_INTL(MSG_UPD_NOBITS)); 3364 return (S_ERROR); 3365 } 3366 phdr->p_filesz = offset - phdr->p_offset; 3367 } else if ((sgp->sg_flags & FLG_SG_PHREQ) == 0) 3368 nobits = TRUE; 3369 } 3370 phdr->p_memsz = offset - hshdr->sh_offset; 3371 3372 /* 3373 * If this is PT_SUNWBSS, set alignment 3374 */ 3375 if (phdr->p_type == PT_SUNWBSS) 3376 phdr->p_align = p_align; 3377 3378 /* 3379 * If this is the first loadable segment of a dynamic object, 3380 * or an interpreter has been specified (a static object built 3381 * with an interpreter will still be given a PT_HDR entry), then 3382 * compensate for the elf header and program header array. Both 3383 * of these are actually part of the loadable segment as they 3384 * may be inspected by the interpreter. Adjust the segments 3385 * size and offset accordingly. 3386 */ 3387 if ((_phdr == 0) && (phdr->p_type == PT_LOAD) && 3388 ((ofl->ofl_osinterp) || (flags & FLG_OF_DYNAMIC)) && 3389 (!(ofl->ofl_dtflags_1 & DF_1_NOHDR))) { 3390 size = (Addr)S_ROUND((phdrsz + ehdrsz), 3391 hshdr->sh_addralign); 3392 phdr->p_offset -= size; 3393 phdr->p_filesz += size; 3394 phdr->p_memsz += size; 3395 } 3396 3397 /* 3398 * If a segment size symbol is required (specified via a 3399 * mapfile) update its value. 3400 */ 3401 if (sgp->sg_sizesym != NULL) 3402 sgp->sg_sizesym->sd_sym->st_value = phdr->p_memsz; 3403 3404 /* 3405 * If no file content has been assigned to this segment (it 3406 * only contains no-bits sections), then reset the offset for 3407 * consistency. 3408 */ 3409 if (phdr->p_filesz == 0) 3410 phdr->p_offset = 0; 3411 3412 /* 3413 * If a virtual address has been specified for this segment 3414 * (presumably from a map file) use it and make sure the 3415 * previous segment does not run into this segment. 3416 */ 3417 if ((phdr->p_type == PT_LOAD) || 3418 (phdr->p_type == PT_SUNWBSS)) { 3419 if ((sgp->sg_flags & FLG_SG_VADDR)) { 3420 if (_phdr && (vaddr > phdr->p_vaddr) && 3421 (phdr->p_type == PT_LOAD)) 3422 eprintf(ofl->ofl_lml, ERR_WARNING, 3423 MSG_INTL(MSG_UPD_SEGOVERLAP), 3424 ofl->ofl_name, EC_ADDR(vaddr), 3425 sgp->sg_name, 3426 EC_ADDR(phdr->p_vaddr)); 3427 vaddr = phdr->p_vaddr; 3428 phdr->p_align = 0; 3429 } else { 3430 vaddr = phdr->p_vaddr = 3431 (Addr)S_ROUND(vaddr, phdr->p_align); 3432 } 3433 } 3434 3435 /* 3436 * Adjust the address offset and p_align if needed. 3437 */ 3438 if (((sgp->sg_flags & FLG_SG_VADDR) == 0) && 3439 ((ofl->ofl_dtflags_1 & DF_1_NOHDR) == 0)) { 3440 if (phdr->p_align != 0) 3441 vaddr += phdr->p_offset % phdr->p_align; 3442 else 3443 vaddr += phdr->p_offset; 3444 phdr->p_vaddr = vaddr; 3445 } 3446 3447 /* 3448 * If an interpreter is required set the virtual address of the 3449 * PT_PHDR program header now that we know the virtual address 3450 * of the loadable segment that contains it. Update the 3451 * PT_SUNWCAP header similarly. 3452 */ 3453 if ((_phdr == 0) && (phdr->p_type == PT_LOAD)) { 3454 _phdr = phdr; 3455 3456 if (!(ofl->ofl_dtflags_1 & DF_1_NOHDR)) { 3457 if (ofl->ofl_osinterp) 3458 ofl->ofl_phdr[0].p_vaddr = 3459 vaddr + ehdrsz; 3460 3461 if (ofl->ofl_oscap) 3462 ofl->ofl_phdr[capndx].p_vaddr = vaddr + 3463 ofl->ofl_phdr[capndx].p_offset; 3464 3465 /* 3466 * Finally, if we're creating a dynamic object 3467 * (or a static object in which an interpreter 3468 * is specified) update the vaddr to reflect 3469 * the address of the first section within this 3470 * segment. 3471 */ 3472 if ((ofl->ofl_osinterp) || 3473 (flags & FLG_OF_DYNAMIC)) 3474 vaddr += size; 3475 } else { 3476 /* 3477 * If the DF_1_NOHDR flag was set, PT_PHDR 3478 * will not be part of any loadable segment. 3479 */ 3480 ofl->ofl_phdr[0].p_vaddr = 0; 3481 ofl->ofl_phdr[0].p_memsz = 0; 3482 ofl->ofl_phdr[0].p_flags = 0; 3483 } 3484 } 3485 3486 /* 3487 * Ensure the ELF entry point defaults to zero. Typically, this 3488 * value is overridden in update_oehdr() to one of the standard 3489 * entry points. Historically, this default was set to the 3490 * address of first executable section, but this has since been 3491 * found to be more confusing than it is helpful. 3492 */ 3493 ehdr->e_entry = 0; 3494 3495 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3496 3497 /* 3498 * Traverse the output section descriptors for this segment so 3499 * that we can update the section headers addresses. We've 3500 * calculated the virtual address of the initial section within 3501 * this segment, so each successive section can be calculated 3502 * based on their offsets from each other. 3503 */ 3504 secndx = 0; 3505 hshdr = 0; 3506 for (ALIST_TRAVERSE(sgp->sg_osdescs, off, ospp)) { 3507 Shdr *shdr; 3508 3509 osp = *ospp; 3510 shdr = osp->os_shdr; 3511 3512 if (shdr->sh_link) 3513 shdr->sh_link = 3514 translate_link(ofl, osp, shdr->sh_link, 3515 MSG_INTL(MSG_FIL_INVSHLINK)); 3516 3517 if (shdr->sh_info && (shdr->sh_flags & SHF_INFO_LINK)) 3518 shdr->sh_info = 3519 translate_link(ofl, osp, shdr->sh_info, 3520 MSG_INTL(MSG_FIL_INVSHINFO)); 3521 3522 if (!(flags & FLG_OF_RELOBJ) && 3523 (phdr->p_type == PT_LOAD) || 3524 (phdr->p_type == PT_SUNWBSS)) { 3525 if (hshdr) 3526 vaddr += (shdr->sh_offset - 3527 hshdr->sh_offset); 3528 3529 shdr->sh_addr = vaddr; 3530 hshdr = shdr; 3531 } 3532 3533 DBG_CALL(Dbg_seg_os(ofl, osp, secndx)); 3534 secndx++; 3535 } 3536 3537 /* 3538 * Establish the virtual address of the end of the last section 3539 * in this segment so that the next segments offset can be 3540 * calculated from this. 3541 */ 3542 if (hshdr) 3543 vaddr += hshdr->sh_size; 3544 3545 /* 3546 * Output sections for this segment complete. Adjust the 3547 * virtual offset for the last sections size, and make sure we 3548 * haven't exceeded any maximum segment length specification. 3549 */ 3550 if ((sgp->sg_length != 0) && (sgp->sg_length < phdr->p_memsz)) { 3551 eprintf(ofl->ofl_lml, ERR_FATAL, 3552 MSG_INTL(MSG_UPD_LARGSIZE), ofl->ofl_name, 3553 sgp->sg_name, EC_XWORD(phdr->p_memsz), 3554 EC_XWORD(sgp->sg_length)); 3555 return (S_ERROR); 3556 } 3557 3558 if (phdr->p_type == PT_NOTE) { 3559 phdr->p_vaddr = 0; 3560 phdr->p_paddr = 0; 3561 phdr->p_align = 0; 3562 phdr->p_memsz = 0; 3563 } 3564 if ((phdr->p_type != PT_NULL) && !(flags & FLG_OF_RELOBJ)) 3565 ofl->ofl_phdr[phdrndx++] = *phdr; 3566 } 3567 3568 /* 3569 * Update any new output sections. When building the initial output 3570 * image, a number of sections were created but left uninitialized (eg. 3571 * .dynsym, .dynstr, .symtab, .symtab, etc.). Here we update these 3572 * sections with the appropriate data. Other sections may still be 3573 * modified via reloc_process(). 3574 * 3575 * Copy the interpreter name into the .interp section. 3576 */ 3577 if (ofl->ofl_interp) 3578 (void) strcpy((char *)ofl->ofl_osinterp->os_outdata->d_buf, 3579 ofl->ofl_interp); 3580 3581 /* 3582 * Update the .shstrtab, .strtab and .dynstr sections. 3583 */ 3584 update_ostrtab(ofl->ofl_osshstrtab, ofl->ofl_shdrsttab); 3585 update_ostrtab(ofl->ofl_osstrtab, ofl->ofl_strtab); 3586 update_ostrtab(ofl->ofl_osdynstr, ofl->ofl_dynstrtab); 3587 3588 /* 3589 * Build any output symbol tables, the symbols information is copied 3590 * and updated into the new output image. 3591 */ 3592 if ((etext = update_osym(ofl)) == (Addr)S_ERROR) 3593 return (S_ERROR); 3594 3595 /* 3596 * If we have a PT_SUNWDTRACE phdr, update it now with the address of 3597 * the symbol. It's only now been updated via update_sym(). 3598 */ 3599 if (dtracephdr && ofl->ofl_dtracesym) { 3600 Phdr *pphdr; 3601 Sym_desc *sdp = ofl->ofl_dtracesym; 3602 3603 dtracephdr->p_vaddr = sdp->sd_sym->st_value; 3604 dtracephdr->p_memsz = sdp->sd_sym->st_size; 3605 3606 /* 3607 * Take permisions of the segment the symbol is associated with. 3608 */ 3609 pphdr = &sdp->sd_isc->is_osdesc->os_sgdesc->sg_phdr; 3610 assert(pphdr); 3611 dtracephdr->p_flags = pphdr->p_flags; 3612 } 3613 3614 /* 3615 * Update the GROUP sections. 3616 */ 3617 if (update_ogroup(ofl) == S_ERROR) 3618 return (S_ERROR); 3619 3620 /* 3621 * Update Move Table. 3622 */ 3623 if (ofl->ofl_osmove || ofl->ofl_issunwdata1) { 3624 if (update_move(ofl) == S_ERROR) 3625 return (S_ERROR); 3626 } 3627 3628 /* 3629 * Build any output headers, version information, dynamic structure and 3630 * syminfo structure. 3631 */ 3632 if (update_oehdr(ofl) == S_ERROR) 3633 return (S_ERROR); 3634 if ((flags & (FLG_OF_VERDEF | FLG_OF_NOVERSEC)) == FLG_OF_VERDEF) 3635 if (update_overdef(ofl) == S_ERROR) 3636 return (S_ERROR); 3637 if ((flags & (FLG_OF_VERNEED | FLG_OF_NOVERSEC)) == FLG_OF_VERNEED) 3638 if (update_overneed(ofl) == S_ERROR) 3639 return (S_ERROR); 3640 if (flags & FLG_OF_DYNAMIC) { 3641 if (update_odynamic(ofl) == S_ERROR) 3642 return (S_ERROR); 3643 if (ofl->ofl_ossyminfo) 3644 if (update_osyminfo(ofl) == S_ERROR) 3645 return (S_ERROR); 3646 } 3647 3648 /* 3649 * Emit Strtab diagnostics. 3650 */ 3651 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osshstrtab, 3652 ofl->ofl_shdrsttab)); 3653 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osstrtab, 3654 ofl->ofl_strtab)); 3655 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osdynstr, 3656 ofl->ofl_dynstrtab)); 3657 3658 /* 3659 * Initialize the section headers string table index within the elf 3660 * header. 3661 */ 3662 /* LINTED */ 3663 if ((shscnndx = elf_ndxscn(ofl->ofl_osshstrtab->os_scn)) < 3664 SHN_LORESERVE) { 3665 ofl->ofl_nehdr->e_shstrndx = 3666 /* LINTED */ 3667 (Half)shscnndx; 3668 } else { 3669 /* 3670 * If the STRTAB section index doesn't fit into 3671 * e_shstrndx, then we store it in 'shdr[0].st_link'. 3672 */ 3673 Elf_Scn *scn; 3674 Shdr *shdr0; 3675 3676 if ((scn = elf_getscn(ofl->ofl_elf, 0)) == NULL) { 3677 eprintf(ofl->ofl_lml, ERR_ELF, 3678 MSG_INTL(MSG_ELF_GETSCN), ofl->ofl_name); 3679 return (S_ERROR); 3680 } 3681 if ((shdr0 = elf_getshdr(scn)) == NULL) { 3682 eprintf(ofl->ofl_lml, ERR_ELF, 3683 MSG_INTL(MSG_ELF_GETSHDR), ofl->ofl_name); 3684 return (S_ERROR); 3685 } 3686 ofl->ofl_nehdr->e_shstrndx = SHN_XINDEX; 3687 shdr0->sh_link = shscnndx; 3688 } 3689 3690 return ((uintptr_t)etext); 3691 } 3692