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 2009 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 /* 31 * Update the new output file image, perform virtual address, offset and 32 * displacement calculations on the program headers and sections headers, 33 * and generate any new output section information. 34 */ 35 36 #define ELF_TARGET_AMD64 37 38 #include <stdio.h> 39 #include <string.h> 40 #include <unistd.h> 41 #include <debug.h> 42 #include "msg.h" 43 #include "_libld.h" 44 45 /* 46 * Comparison routine used by qsort() for sorting of the global symbol list 47 * based off of the hashbuckets the symbol will eventually be deposited in. 48 */ 49 static int 50 sym_hash_compare(Sym_s_list * s1, Sym_s_list * s2) 51 { 52 return (s1->sl_hval - s2->sl_hval); 53 } 54 55 /* 56 * Comparison routine used by qsort() for sorting of dyn[sym|tls]sort section 57 * indices based on the address of the symbols they reference. The 58 * use of the global dynsort_compare_syms variable is needed because 59 * we need to examine the symbols the indices reference. It is safe, because 60 * the linker is single threaded. 61 */ 62 Sym *dynsort_compare_syms; 63 64 static int 65 dynsort_compare(const void *idx1, const void *idx2) 66 { 67 Sym *s1 = dynsort_compare_syms + *((const Word *) idx1); 68 Sym *s2 = dynsort_compare_syms + *((const Word *) idx2); 69 70 /* 71 * Note: the logical computation for this is 72 * (st_value1 - st_value2) 73 * However, that is only correct if the address type is smaller 74 * than a pointer. Writing it this way makes it immune to the 75 * class (32 or 64-bit) of the linker. 76 */ 77 return ((s1->st_value < s2->st_value) ? -1 : 78 (s1->st_value > s2->st_value)); 79 } 80 81 /* 82 * Scan the sorted symbols, and issue warnings if there are any duplicate 83 * values in the list. We only do this if -zverbose is set, or we are 84 * running with LD_DEBUG defined 85 * 86 * entry: 87 * ofl - Output file descriptor 88 * ldynsym - Pointer to start of .SUNW_ldynsym section that the 89 * sort section indexes reference. 90 * symsort - Pointer to start of .SUNW_dynsymsort or .SUNW_dyntlssort 91 * section. 92 * n - # of indices in symsort array 93 * secname - Name of the symsort section. 94 * 95 * exit: 96 * If the symsort section contains indexes to more than one 97 * symbol with the same address value, a warning is issued. 98 */ 99 static void 100 dynsort_dupwarn(Ofl_desc *ofl, Sym *ldynsym, const char *str, 101 Word *symsort, Word n, const char *secname) 102 { 103 int zverbose = (ofl->ofl_flags & FLG_OF_VERBOSE) != 0; 104 Word ndx, cmp_ndx; 105 Addr addr, cmp_addr; 106 107 /* Nothing to do if -zverbose or LD_DEBUG are not active */ 108 if (!(zverbose || DBG_ENABLED)) 109 return; 110 111 cmp_ndx = 0; 112 cmp_addr = ldynsym[symsort[cmp_ndx]].st_value; 113 for (ndx = 1; ndx < n; ndx++) { 114 addr = ldynsym[symsort[ndx]].st_value; 115 if (cmp_addr == addr) { 116 if (zverbose) 117 eprintf(ofl->ofl_lml, ERR_WARNING, 118 MSG_INTL(MSG_SYM_DUPSORTADDR), secname, 119 str + ldynsym[symsort[cmp_ndx]].st_name, 120 str + ldynsym[symsort[ndx]].st_name, 121 EC_ADDR(addr)); 122 DBG_CALL(Dbg_syms_dup_sort_addr(ofl->ofl_lml, secname, 123 str + ldynsym[symsort[cmp_ndx]].st_name, 124 str + ldynsym[symsort[ndx]].st_name, 125 EC_ADDR(addr))); 126 } else { /* Not a dup. Move reference up */ 127 cmp_ndx = ndx; 128 cmp_addr = addr; 129 } 130 } 131 } 132 133 134 /* 135 * Build and update any output symbol tables. Here we work on all the symbol 136 * tables at once to reduce the duplication of symbol and string manipulation. 137 * Symbols and their associated strings are copied from the read-only input 138 * file images to the output image and their values and index's updated in the 139 * output image. 140 */ 141 static Addr 142 update_osym(Ofl_desc *ofl) 143 { 144 /* 145 * There are several places in this function where we wish 146 * to insert a symbol index to the combined .SUNW_ldynsym/.dynsym 147 * symbol table into one of the two sort sections (.SUNW_dynsymsort 148 * or .SUNW_dyntlssort), if that symbol has the right attributes. 149 * This macro is used to generate the necessary code from a single 150 * specification. 151 * 152 * entry: 153 * _sdp, _sym, _type - As per DYNSORT_COUNT. See _libld.h 154 * _sym_ndx - Index that _sym will have in the combined 155 * .SUNW_ldynsym/.dynsym symbol table. 156 */ 157 #define ADD_TO_DYNSORT(_sdp, _sym, _type, _sym_ndx) \ 158 { \ 159 Word *_dynsort_arr, *_dynsort_ndx; \ 160 \ 161 if (dynsymsort_symtype[_type]) { \ 162 _dynsort_arr = dynsymsort; \ 163 _dynsort_ndx = &dynsymsort_ndx; \ 164 } else if (_type == STT_TLS) { \ 165 _dynsort_arr = dyntlssort; \ 166 _dynsort_ndx = &dyntlssort_ndx; \ 167 } else { \ 168 _dynsort_arr = NULL; \ 169 } \ 170 if ((_dynsort_arr != NULL) && DYNSORT_TEST_ATTR(_sdp, _sym)) \ 171 _dynsort_arr[(*_dynsort_ndx)++] = _sym_ndx; \ 172 } 173 174 175 Sym_desc *sdp; 176 Sym_avlnode *sav; 177 Sg_desc *sgp, *tsgp = NULL, *dsgp = NULL, *esgp = NULL; 178 Os_desc *osp, *iosp = NULL, *fosp = NULL; 179 Is_desc *isc; 180 Ifl_desc *ifl; 181 Word bssndx, etext_ndx, edata_ndx = 0, end_ndx, start_ndx; 182 Word end_abs = 0, etext_abs = 0, edata_abs; 183 Word tlsbssndx = 0, parexpnndx; 184 #if defined(_ELF64) 185 Word lbssndx = 0; 186 Addr lbssaddr = 0; 187 #endif 188 Addr bssaddr, etext = 0, edata = 0, end = 0, start = 0; 189 Addr tlsbssaddr = 0; 190 Addr parexpnbase, parexpnaddr; 191 int start_set = 0; 192 Sym _sym = {0}, *sym, *symtab = NULL; 193 Sym *dynsym = NULL, *ldynsym = NULL; 194 Word symtab_ndx = 0; /* index into .symtab */ 195 Word symtab_gbl_bndx; /* .symtab ndx 1st global */ 196 Word ldynsym_ndx = 0; /* index into .SUNW_ldynsym */ 197 Word dynsym_ndx = 0; /* index into .dynsym */ 198 Word scopesym_ndx = 0; /* index into scoped symbols */ 199 Word scopesym_bndx = 0; /* .symtab ndx 1st scoped sym */ 200 Word ldynscopesym_ndx = 0; /* index to ldynsym scoped syms */ 201 Word *dynsymsort = NULL; /* SUNW_dynsymsort index vector */ 202 Word *dyntlssort = NULL; /* SUNW_dyntlssort index vector */ 203 Word dynsymsort_ndx; /* index dynsymsort array */ 204 Word dyntlssort_ndx; /* index dyntlssort array */ 205 Word *symndx; /* Symbol index (for relocation use) */ 206 Word *symshndx = NULL; /* .symtab_shndx table */ 207 Word *dynshndx = NULL; /* .dynsym_shndx table */ 208 Word *ldynshndx = NULL; /* .SUNW_ldynsym_shndx table */ 209 Word ldynsym_cnt = NULL; /* # of items in .SUNW_ldynsym */ 210 Str_tbl *shstrtab; 211 Str_tbl *strtab; 212 Str_tbl *dynstr; 213 Word *hashtab; /* hash table pointer */ 214 Word *hashbkt; /* hash table bucket pointer */ 215 Word *hashchain; /* hash table chain pointer */ 216 Word hashval; /* value of hash function */ 217 Wk_desc *wkp; 218 Alist *weak = NULL; 219 ofl_flag_t flags = ofl->ofl_flags; 220 Word dtflags_1 = ofl->ofl_dtflags_1; 221 Versym *versym; 222 Gottable *gottable; /* used for display got debugging */ 223 /* information */ 224 Syminfo *syminfo; 225 Sym_s_list *sorted_syms; /* table to hold sorted symbols */ 226 Word ssndx; /* global index into sorted_syms */ 227 Word scndx; /* scoped index into sorted_syms */ 228 size_t stoff; /* string offset */ 229 Aliste idx1; 230 231 /* 232 * Initialize pointers to the symbol table entries and the symbol 233 * table strings. Skip the first symbol entry and the first string 234 * table byte. Note that if we are not generating any output symbol 235 * tables we must still generate and update an internal copies so 236 * that the relocation phase has the correct information. 237 */ 238 if (!(flags & FLG_OF_STRIP) || (flags & FLG_OF_RELOBJ) || 239 ((flags & FLG_OF_STATIC) && ofl->ofl_osversym)) { 240 symtab = (Sym *)ofl->ofl_ossymtab->os_outdata->d_buf; 241 symtab[symtab_ndx++] = _sym; 242 if (ofl->ofl_ossymshndx) 243 symshndx = 244 (Word *)ofl->ofl_ossymshndx->os_outdata->d_buf; 245 } 246 if (OFL_ALLOW_DYNSYM(ofl)) { 247 dynsym = (Sym *)ofl->ofl_osdynsym->os_outdata->d_buf; 248 dynsym[dynsym_ndx++] = _sym; 249 /* 250 * If we are also constructing a .SUNW_ldynsym section 251 * to contain local function symbols, then set it up too. 252 */ 253 if (ofl->ofl_osldynsym) { 254 ldynsym = (Sym *)ofl->ofl_osldynsym->os_outdata->d_buf; 255 ldynsym[ldynsym_ndx++] = _sym; 256 ldynsym_cnt = 1 + ofl->ofl_dynlocscnt + 257 ofl->ofl_dynscopecnt; 258 259 /* 260 * If there is a SUNW_ldynsym, then there may also 261 * be a .SUNW_dynsymsort and/or .SUNW_dyntlssort 262 * sections, used to collect indices of function 263 * and data symbols sorted by address order. 264 */ 265 if (ofl->ofl_osdynsymsort) { /* .SUNW_dynsymsort */ 266 dynsymsort = (Word *) 267 ofl->ofl_osdynsymsort->os_outdata->d_buf; 268 dynsymsort_ndx = 0; 269 } 270 if (ofl->ofl_osdyntlssort) { /* .SUNW_dyntlssort */ 271 dyntlssort = (Word *) 272 ofl->ofl_osdyntlssort->os_outdata->d_buf; 273 dyntlssort_ndx = 0; 274 } 275 } 276 277 /* 278 * Initialize the hash table. 279 */ 280 hashtab = (Word *)(ofl->ofl_oshash->os_outdata->d_buf); 281 hashbkt = &hashtab[2]; 282 hashchain = &hashtab[2 + ofl->ofl_hashbkts]; 283 hashtab[0] = ofl->ofl_hashbkts; 284 hashtab[1] = ofl->ofl_dynshdrcnt + ofl->ofl_globcnt + 285 ofl->ofl_lregsymcnt + 1; 286 if (ofl->ofl_osdynshndx) 287 dynshndx = 288 (Word *)ofl->ofl_osdynshndx->os_outdata->d_buf; 289 if (ofl->ofl_osldynshndx) 290 ldynshndx = 291 (Word *)ofl->ofl_osldynshndx->os_outdata->d_buf; 292 } 293 294 /* 295 * symndx is the symbol index to be used for relocation processing. It 296 * points to the relevant symtab's (.dynsym or .symtab) symbol ndx. 297 */ 298 if (dynsym) 299 symndx = &dynsym_ndx; 300 else 301 symndx = &symtab_ndx; 302 303 /* 304 * If we have version definitions initialize the version symbol index 305 * table. There is one entry for each symbol which contains the symbols 306 * version index. 307 */ 308 if (!(flags & FLG_OF_NOVERSEC) && 309 (flags & (FLG_OF_VERNEED | FLG_OF_VERDEF))) { 310 versym = (Versym *)ofl->ofl_osversym->os_outdata->d_buf; 311 versym[0] = NULL; 312 } else 313 versym = NULL; 314 315 /* 316 * If syminfo section exists be prepared to fill it in. 317 */ 318 if (ofl->ofl_ossyminfo) { 319 syminfo = ofl->ofl_ossyminfo->os_outdata->d_buf; 320 syminfo[0].si_flags = SYMINFO_CURRENT; 321 } else 322 syminfo = NULL; 323 324 /* 325 * Setup our string tables. 326 */ 327 shstrtab = ofl->ofl_shdrsttab; 328 strtab = ofl->ofl_strtab; 329 dynstr = ofl->ofl_dynstrtab; 330 331 DBG_CALL(Dbg_syms_sec_title(ofl->ofl_lml)); 332 333 /* 334 * Put output file name to the first .symtab and .SUNW_ldynsym symbol. 335 */ 336 if (symtab) { 337 (void) st_setstring(strtab, ofl->ofl_name, &stoff); 338 sym = &symtab[symtab_ndx++]; 339 /* LINTED */ 340 sym->st_name = stoff; 341 sym->st_value = 0; 342 sym->st_size = 0; 343 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_FILE); 344 sym->st_other = 0; 345 sym->st_shndx = SHN_ABS; 346 347 if (versym && !dynsym) 348 versym[1] = 0; 349 } 350 if (ldynsym) { 351 (void) st_setstring(dynstr, ofl->ofl_name, &stoff); 352 sym = &ldynsym[ldynsym_ndx]; 353 /* LINTED */ 354 sym->st_name = stoff; 355 sym->st_value = 0; 356 sym->st_size = 0; 357 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_FILE); 358 sym->st_other = 0; 359 sym->st_shndx = SHN_ABS; 360 361 /* Scoped symbols get filled in global loop below */ 362 ldynscopesym_ndx = ldynsym_ndx + 1; 363 ldynsym_ndx += ofl->ofl_dynscopecnt; 364 } 365 366 /* 367 * If we are to display GOT summary information, then allocate 368 * the buffer to 'cache' the GOT symbols into now. 369 */ 370 if (DBG_ENABLED) { 371 if ((ofl->ofl_gottable = gottable = 372 libld_calloc(ofl->ofl_gotcnt, sizeof (Gottable))) == NULL) 373 return ((Addr)S_ERROR); 374 } 375 376 /* 377 * Traverse the program headers. Determine the last executable segment 378 * and the last data segment so that we can update etext and edata. If 379 * we have empty segments (reservations) record them for setting _end. 380 */ 381 for (APLIST_TRAVERSE(ofl->ofl_segs, idx1, sgp)) { 382 Phdr *phd = &(sgp->sg_phdr); 383 Os_desc *osp; 384 Aliste idx2; 385 386 if (phd->p_type == PT_LOAD) { 387 if (sgp->sg_osdescs != NULL) { 388 Word _flags = phd->p_flags & (PF_W | PF_R); 389 390 if (_flags == PF_R) 391 tsgp = sgp; 392 else if (_flags == (PF_W | PF_R)) 393 dsgp = sgp; 394 } else if (sgp->sg_flags & FLG_SG_EMPTY) 395 esgp = sgp; 396 } 397 398 /* 399 * Generate a section symbol for each output section. 400 */ 401 for (APLIST_TRAVERSE(sgp->sg_osdescs, idx2, osp)) { 402 Word sectndx; 403 404 sym = &_sym; 405 sym->st_value = osp->os_shdr->sh_addr; 406 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_SECTION); 407 /* LINTED */ 408 sectndx = elf_ndxscn(osp->os_scn); 409 410 if (symtab) { 411 if (sectndx >= SHN_LORESERVE) { 412 symshndx[symtab_ndx] = sectndx; 413 sym->st_shndx = SHN_XINDEX; 414 } else { 415 /* LINTED */ 416 sym->st_shndx = (Half)sectndx; 417 } 418 symtab[symtab_ndx++] = *sym; 419 } 420 421 if (dynsym && (osp->os_flags & FLG_OS_OUTREL)) 422 dynsym[dynsym_ndx++] = *sym; 423 424 if ((dynsym == NULL) || 425 (osp->os_flags & FLG_OS_OUTREL)) { 426 if (versym) 427 versym[*symndx - 1] = 0; 428 osp->os_identndx = *symndx - 1; 429 DBG_CALL(Dbg_syms_sec_entry(ofl->ofl_lml, 430 osp->os_identndx, sgp, osp)); 431 } 432 433 /* 434 * Generate the .shstrtab for this section. 435 */ 436 (void) st_setstring(shstrtab, osp->os_name, &stoff); 437 osp->os_shdr->sh_name = (Word)stoff; 438 439 /* 440 * Find the section index for our special symbols. 441 */ 442 if (sgp == tsgp) { 443 /* LINTED */ 444 etext_ndx = elf_ndxscn(osp->os_scn); 445 } else if (dsgp == sgp) { 446 if (osp->os_shdr->sh_type != SHT_NOBITS) { 447 /* LINTED */ 448 edata_ndx = elf_ndxscn(osp->os_scn); 449 } 450 } 451 452 if (start_set == 0) { 453 start = sgp->sg_phdr.p_vaddr; 454 /* LINTED */ 455 start_ndx = elf_ndxscn(osp->os_scn); 456 start_set++; 457 } 458 459 /* 460 * While we're here, determine whether a .init or .fini 461 * section exist. 462 */ 463 if ((iosp == NULL) && (strcmp(osp->os_name, 464 MSG_ORIG(MSG_SCN_INIT)) == 0)) 465 iosp = osp; 466 if ((fosp == NULL) && (strcmp(osp->os_name, 467 MSG_ORIG(MSG_SCN_FINI)) == 0)) 468 fosp = osp; 469 } 470 } 471 472 /* 473 * Add local register symbols to the .dynsym. These are required as 474 * DT_REGISTER .dynamic entries must have a symbol to reference. 475 */ 476 if (ofl->ofl_regsyms && dynsym) { 477 int ndx; 478 479 for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 480 Sym_desc *rsdp; 481 482 if ((rsdp = ofl->ofl_regsyms[ndx]) == NULL) 483 continue; 484 485 if (((rsdp->sd_flags1 & FLG_SY1_HIDDEN) == 0) && 486 (ELF_ST_BIND(rsdp->sd_sym->st_info) != STB_LOCAL)) 487 continue; 488 489 dynsym[dynsym_ndx] = *(rsdp->sd_sym); 490 rsdp->sd_symndx = *symndx; 491 492 if (dynsym[dynsym_ndx].st_name) { 493 (void) st_setstring(dynstr, rsdp->sd_name, 494 &stoff); 495 dynsym[dynsym_ndx].st_name = stoff; 496 } 497 dynsym_ndx++; 498 } 499 } 500 501 /* 502 * Having traversed all the output segments, warn the user if the 503 * traditional text or data segments don't exist. Otherwise from these 504 * segments establish the values for `etext', `edata', `end', `END', 505 * and `START'. 506 */ 507 if (!(flags & FLG_OF_RELOBJ)) { 508 Sg_desc *sgp; 509 510 if (tsgp) 511 etext = tsgp->sg_phdr.p_vaddr + tsgp->sg_phdr.p_filesz; 512 else { 513 etext = (Addr)0; 514 etext_ndx = SHN_ABS; 515 etext_abs = 1; 516 if (flags & FLG_OF_VERBOSE) 517 eprintf(ofl->ofl_lml, ERR_WARNING, 518 MSG_INTL(MSG_UPD_NOREADSEG)); 519 } 520 if (dsgp) { 521 edata = dsgp->sg_phdr.p_vaddr + dsgp->sg_phdr.p_filesz; 522 } else { 523 edata = (Addr)0; 524 edata_ndx = SHN_ABS; 525 edata_abs = 1; 526 if (flags & FLG_OF_VERBOSE) 527 eprintf(ofl->ofl_lml, ERR_WARNING, 528 MSG_INTL(MSG_UPD_NORDWRSEG)); 529 } 530 531 if (dsgp == NULL) { 532 if (tsgp) 533 sgp = tsgp; 534 else 535 sgp = 0; 536 } else if (tsgp == NULL) 537 sgp = dsgp; 538 else if (dsgp->sg_phdr.p_vaddr > tsgp->sg_phdr.p_vaddr) 539 sgp = dsgp; 540 else if (dsgp->sg_phdr.p_vaddr < tsgp->sg_phdr.p_vaddr) 541 sgp = tsgp; 542 else { 543 /* 544 * One of the segments must be of zero size. 545 */ 546 if (tsgp->sg_phdr.p_memsz) 547 sgp = tsgp; 548 else 549 sgp = dsgp; 550 } 551 552 if (esgp && (esgp->sg_phdr.p_vaddr > sgp->sg_phdr.p_vaddr)) 553 sgp = esgp; 554 555 if (sgp) { 556 end = sgp->sg_phdr.p_vaddr + sgp->sg_phdr.p_memsz; 557 558 /* 559 * If the last loadable segment is a read-only segment, 560 * then the application which uses the symbol _end to 561 * find the beginning of writable heap area may cause 562 * segmentation violation. We adjust the value of the 563 * _end to skip to the next page boundary. 564 * 565 * 6401812 System interface which returs beginning 566 * heap would be nice. 567 * When the above RFE is implemented, the changes below 568 * could be changed in a better way. 569 */ 570 if ((sgp->sg_phdr.p_flags & PF_W) == 0) 571 end = (Addr)S_ROUND(end, sysconf(_SC_PAGESIZE)); 572 573 /* 574 * If we're dealing with a memory reservation there are 575 * no sections to establish an index for _end, so assign 576 * it as an absolute. 577 */ 578 if (sgp->sg_osdescs != NULL) { 579 /* 580 * Determine the last section for this segment. 581 */ 582 Os_desc *osp = sgp->sg_osdescs->apl_data 583 [sgp->sg_osdescs->apl_nitems - 1]; 584 585 /* LINTED */ 586 end_ndx = elf_ndxscn(osp->os_scn); 587 } else { 588 end_ndx = SHN_ABS; 589 end_abs = 1; 590 } 591 } else { 592 end = (Addr) 0; 593 end_ndx = SHN_ABS; 594 end_abs = 1; 595 eprintf(ofl->ofl_lml, ERR_WARNING, 596 MSG_INTL(MSG_UPD_NOSEG)); 597 } 598 } 599 600 DBG_CALL(Dbg_syms_up_title(ofl->ofl_lml)); 601 602 /* 603 * Initialize the scoped symbol table entry point. This is for all 604 * the global symbols that have been scoped to locals and will be 605 * filled in during global symbol processing so that we don't have 606 * to traverse the globals symbol hash array more than once. 607 */ 608 if (symtab) { 609 scopesym_bndx = symtab_ndx; 610 scopesym_ndx = scopesym_bndx; 611 symtab_ndx += ofl->ofl_scopecnt; 612 } 613 614 /* 615 * If expanding partially expanded symbols under '-z nopartial', 616 * prepare to do that. 617 */ 618 if (ofl->ofl_isparexpn) { 619 osp = ofl->ofl_isparexpn->is_osdesc; 620 parexpnbase = parexpnaddr = (Addr)(osp->os_shdr->sh_addr + 621 ofl->ofl_isparexpn->is_indata->d_off); 622 /* LINTED */ 623 parexpnndx = elf_ndxscn(osp->os_scn); 624 ofl->ofl_parexpnndx = osp->os_identndx; 625 } 626 627 /* 628 * If we are generating a .symtab collect all the local symbols, 629 * assigning a new virtual address or displacement (value). 630 */ 631 for (APLIST_TRAVERSE(ofl->ofl_objs, idx1, ifl)) { 632 Xword lndx, local; 633 634 /* 635 * Check that we have local symbols to process. If the user 636 * has indicated scoping then scan the global symbols also 637 * looking for entries from this file to reduce to locals. 638 */ 639 if ((local = ifl->ifl_locscnt) == 0) 640 continue; 641 642 for (lndx = 1; lndx < local; lndx++) { 643 Gotndx *gnp; 644 uchar_t type; 645 Word *_symshndx; 646 int enter_in_symtab, enter_in_ldynsym; 647 int update_done; 648 649 sdp = ifl->ifl_oldndx[lndx]; 650 sym = sdp->sd_sym; 651 652 /* 653 * Assign a got offset if necessary. 654 */ 655 if ((ld_targ.t_mr.mr_assign_got != NULL) && 656 (*ld_targ.t_mr.mr_assign_got)(ofl, sdp) == S_ERROR) 657 return ((Addr)S_ERROR); 658 659 if (DBG_ENABLED) { 660 Aliste idx2; 661 662 for (ALIST_TRAVERSE(sdp->sd_GOTndxs, 663 idx2, gnp)) { 664 gottable->gt_sym = sdp; 665 gottable->gt_gndx.gn_gotndx = 666 gnp->gn_gotndx; 667 gottable->gt_gndx.gn_addend = 668 gnp->gn_addend; 669 gottable++; 670 } 671 } 672 673 if ((type = ELF_ST_TYPE(sym->st_info)) == STT_SECTION) 674 continue; 675 676 /* 677 * Ignore any symbols that have been marked as invalid 678 * during input processing. Providing these aren't used 679 * for relocation they'll just be dropped from the 680 * output image. 681 */ 682 if (sdp->sd_flags & FLG_SY_INVALID) 683 continue; 684 685 /* 686 * If the section that this symbol was associated 687 * with has been discarded - then we discard 688 * the local symbol along with it. 689 */ 690 if (sdp->sd_flags & FLG_SY_ISDISC) 691 continue; 692 693 /* 694 * If this symbol is from a different file 695 * than the input descriptor we are processing, 696 * treat it as if it has FLG_SY_ISDISC set. 697 * This happens when sloppy_comdat_reloc() 698 * replaces a symbol to a discarded comdat section 699 * with an equivalent symbol from a different 700 * file. We only want to enter such a symbol 701 * once --- as part of the file that actually 702 * supplies it. 703 */ 704 if (ifl != sdp->sd_file) 705 continue; 706 707 708 /* 709 * Generate an output symbol to represent this input 710 * symbol. Even if the symbol table is to be stripped 711 * we still need to update any local symbols that are 712 * used during relocation. 713 */ 714 enter_in_symtab = symtab && 715 (!(ofl->ofl_flags & FLG_OF_REDLSYM) || 716 sdp->sd_move); 717 enter_in_ldynsym = ldynsym && sdp->sd_name && 718 ldynsym_symtype[type] && 719 !(ofl->ofl_flags & FLG_OF_REDLSYM); 720 _symshndx = NULL; 721 722 if (enter_in_symtab) { 723 if (!dynsym) 724 sdp->sd_symndx = *symndx; 725 symtab[symtab_ndx] = *sym; 726 /* 727 * Provided this isn't an unnamed register 728 * symbol, update its name. 729 */ 730 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 731 symtab[symtab_ndx].st_name) { 732 (void) st_setstring(strtab, 733 sdp->sd_name, &stoff); 734 symtab[symtab_ndx].st_name = stoff; 735 } 736 sdp->sd_flags &= ~FLG_SY_CLEAN; 737 if (symshndx) 738 _symshndx = &symshndx[symtab_ndx]; 739 sdp->sd_sym = sym = &symtab[symtab_ndx++]; 740 741 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 742 (sym->st_shndx == SHN_ABS) && 743 !enter_in_ldynsym) 744 continue; 745 } else if (enter_in_ldynsym) { 746 /* 747 * Not using symtab, but we do have ldynsym 748 * available. 749 */ 750 ldynsym[ldynsym_ndx] = *sym; 751 (void) st_setstring(dynstr, sdp->sd_name, 752 &stoff); 753 ldynsym[ldynsym_ndx].st_name = stoff; 754 755 sdp->sd_flags &= ~FLG_SY_CLEAN; 756 if (ldynshndx) 757 _symshndx = &ldynshndx[ldynsym_ndx]; 758 sdp->sd_sym = sym = &ldynsym[ldynsym_ndx]; 759 /* Add it to sort section if it qualifies */ 760 ADD_TO_DYNSORT(sdp, sym, type, ldynsym_ndx); 761 ldynsym_ndx++; 762 } else { /* Not using symtab or ldynsym */ 763 /* 764 * If this symbol requires modifying to provide 765 * for a relocation or move table update, make 766 * a copy of it. 767 */ 768 if (!(sdp->sd_flags & FLG_SY_UPREQD) && 769 !(sdp->sd_move)) 770 continue; 771 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 772 (sym->st_shndx == SHN_ABS)) 773 continue; 774 775 if (ld_sym_copy(sdp) == S_ERROR) 776 return ((Addr)S_ERROR); 777 sym = sdp->sd_sym; 778 } 779 780 /* 781 * Update the symbols contents if necessary. 782 */ 783 update_done = 0; 784 if (type == STT_FILE) { 785 sdp->sd_shndx = sym->st_shndx = SHN_ABS; 786 sdp->sd_flags |= FLG_SY_SPECSEC; 787 update_done = 1; 788 } 789 790 /* 791 * If we are expanding the locally bound partially 792 * initialized symbols, then update the address here. 793 */ 794 if (ofl->ofl_isparexpn && 795 (sdp->sd_flags & FLG_SY_PAREXPN) && !update_done) { 796 sym->st_shndx = parexpnndx; 797 sdp->sd_isc = ofl->ofl_isparexpn; 798 sym->st_value = parexpnaddr; 799 parexpnaddr += sym->st_size; 800 if ((flags & FLG_OF_RELOBJ) == 0) 801 sym->st_value -= parexpnbase; 802 } 803 804 /* 805 * If this isn't an UNDEF symbol (ie. an input section 806 * is associated), update the symbols value and index. 807 */ 808 if (((isc = sdp->sd_isc) != 0) && !update_done) { 809 Word sectndx; 810 811 osp = isc->is_osdesc; 812 /* LINTED */ 813 sym->st_value += 814 (Off)_elf_getxoff(isc->is_indata); 815 if (!(flags & FLG_OF_RELOBJ)) { 816 sym->st_value += osp->os_shdr->sh_addr; 817 /* 818 * TLS symbols are relative to 819 * the TLS segment. 820 */ 821 if ((type == STT_TLS) && 822 (ofl->ofl_tlsphdr)) { 823 sym->st_value -= 824 ofl->ofl_tlsphdr->p_vaddr; 825 } 826 } 827 /* LINTED */ 828 if ((sdp->sd_shndx = sectndx = 829 elf_ndxscn(osp->os_scn)) >= SHN_LORESERVE) { 830 if (_symshndx) { 831 *_symshndx = sectndx; 832 } 833 sym->st_shndx = SHN_XINDEX; 834 } else { 835 /* LINTED */ 836 sym->st_shndx = sectndx; 837 } 838 } 839 840 /* 841 * If entering the symbol in both the symtab and the 842 * ldynsym, then the one in symtab needs to be 843 * copied to ldynsym. If it is only in the ldynsym, 844 * then the code above already set it up and we have 845 * nothing more to do here. 846 */ 847 if (enter_in_symtab && enter_in_ldynsym) { 848 ldynsym[ldynsym_ndx] = *sym; 849 (void) st_setstring(dynstr, sdp->sd_name, 850 &stoff); 851 ldynsym[ldynsym_ndx].st_name = stoff; 852 853 if (_symshndx && ldynshndx) 854 ldynshndx[ldynsym_ndx] = *_symshndx; 855 856 /* Add it to sort section if it qualifies */ 857 ADD_TO_DYNSORT(sdp, sym, type, ldynsym_ndx); 858 859 ldynsym_ndx++; 860 } 861 } 862 } 863 symtab_gbl_bndx = symtab_ndx; /* .symtab index of 1st global entry */ 864 865 /* 866 * Two special symbols are `_init' and `_fini'. If these are supplied 867 * by crti.o then they are used to represent the total concatenation of 868 * the `.init' and `.fini' sections. 869 * 870 * First, determine whether any .init or .fini sections exist. If these 871 * sections exist when a dynamic object is being built, but no `_init' 872 * or `_fini' symbols are found, then the user is probably building this 873 * object directly from ld(1) rather than using a compiler driver that 874 * provides the symbols via crt's. 875 * 876 * If the .init or .fini section exist, and their associated symbols, 877 * determine the size of the sections and updated the symbols value 878 * accordingly. 879 */ 880 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_INIT_U), SYM_NOHASH, 0, 881 ofl)) != NULL) && (sdp->sd_ref == REF_REL_NEED) && sdp->sd_isc && 882 (sdp->sd_isc->is_osdesc == iosp)) { 883 if (ld_sym_copy(sdp) == S_ERROR) 884 return ((Addr)S_ERROR); 885 sdp->sd_sym->st_size = sdp->sd_isc->is_osdesc->os_shdr->sh_size; 886 887 } else if (iosp && !(flags & FLG_OF_RELOBJ)) { 888 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_SYM_NOCRT), 889 MSG_ORIG(MSG_SYM_INIT_U), MSG_ORIG(MSG_SCN_INIT)); 890 } 891 892 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_FINI_U), SYM_NOHASH, 0, 893 ofl)) != NULL) && (sdp->sd_ref == REF_REL_NEED) && sdp->sd_isc && 894 (sdp->sd_isc->is_osdesc == fosp)) { 895 if (ld_sym_copy(sdp) == S_ERROR) 896 return ((Addr)S_ERROR); 897 sdp->sd_sym->st_size = sdp->sd_isc->is_osdesc->os_shdr->sh_size; 898 899 } else if (fosp && !(flags & FLG_OF_RELOBJ)) { 900 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_SYM_NOCRT), 901 MSG_ORIG(MSG_SYM_FINI_U), MSG_ORIG(MSG_SCN_FINI)); 902 } 903 904 /* 905 * Assign .bss information for use with updating COMMON symbols. 906 */ 907 if (ofl->ofl_isbss) { 908 isc = ofl->ofl_isbss; 909 osp = isc->is_osdesc; 910 911 bssaddr = osp->os_shdr->sh_addr + 912 (Off)_elf_getxoff(isc->is_indata); 913 /* LINTED */ 914 bssndx = elf_ndxscn(osp->os_scn); 915 } 916 917 #if defined(_ELF64) 918 /* 919 * For amd64 target, assign .lbss information for use 920 * with updating LCOMMON symbols. 921 */ 922 if ((ld_targ.t_m.m_mach == EM_AMD64) && ofl->ofl_islbss) { 923 osp = ofl->ofl_islbss->is_osdesc; 924 925 lbssaddr = osp->os_shdr->sh_addr + 926 (Off)_elf_getxoff(ofl->ofl_islbss->is_indata); 927 /* LINTED */ 928 lbssndx = elf_ndxscn(osp->os_scn); 929 } 930 #endif 931 932 /* 933 * Assign .tlsbss information for use with updating COMMON symbols. 934 */ 935 if (ofl->ofl_istlsbss) { 936 osp = ofl->ofl_istlsbss->is_osdesc; 937 tlsbssaddr = osp->os_shdr->sh_addr + 938 (Off)_elf_getxoff(ofl->ofl_istlsbss->is_indata); 939 /* LINTED */ 940 tlsbssndx = elf_ndxscn(osp->os_scn); 941 } 942 943 if ((sorted_syms = libld_calloc(ofl->ofl_globcnt + 944 ofl->ofl_elimcnt + ofl->ofl_scopecnt, 945 sizeof (*sorted_syms))) == NULL) 946 return ((Addr)S_ERROR); 947 948 scndx = 0; 949 ssndx = ofl->ofl_scopecnt + ofl->ofl_elimcnt; 950 951 /* 952 * Traverse the internal symbol table updating global symbol information 953 * and allocating common. 954 */ 955 for (sav = avl_first(&ofl->ofl_symavl); sav; 956 sav = AVL_NEXT(&ofl->ofl_symavl, sav)) { 957 Sym *symptr; 958 int local; 959 int restore; 960 961 sdp = sav->sav_symdesc; 962 963 /* 964 * Ignore any symbols that have been marked as invalid during 965 * input processing. Providing these aren't used for 966 * relocation, they will be dropped from the output image. 967 */ 968 if (sdp->sd_flags & FLG_SY_INVALID) { 969 DBG_CALL(Dbg_syms_old(ofl, sdp)); 970 DBG_CALL(Dbg_syms_ignore(ofl, sdp)); 971 continue; 972 } 973 974 /* 975 * Only needed symbols are copied to the output symbol table. 976 */ 977 if (sdp->sd_ref == REF_DYN_SEEN) 978 continue; 979 980 if ((sdp->sd_flags1 & FLG_SY1_HIDDEN) && 981 (flags & FLG_OF_PROCRED)) 982 local = 1; 983 else 984 local = 0; 985 986 if (local || (ofl->ofl_hashbkts == 0)) { 987 sorted_syms[scndx++].sl_sdp = sdp; 988 } else { 989 sorted_syms[ssndx].sl_hval = sdp->sd_aux->sa_hash % 990 ofl->ofl_hashbkts; 991 sorted_syms[ssndx].sl_sdp = sdp; 992 ssndx++; 993 } 994 995 /* 996 * Note - expand the COMMON symbols here because an address 997 * must be assigned to them in the same order that space was 998 * calculated in sym_validate(). If this ordering isn't 999 * followed differing alignment requirements can throw us all 1000 * out of whack. 1001 * 1002 * The expanded .bss global symbol is handled here as well. 1003 * 1004 * The actual adding entries into the symbol table still occurs 1005 * below in hashbucket order. 1006 */ 1007 symptr = sdp->sd_sym; 1008 restore = 0; 1009 if ((sdp->sd_flags & FLG_SY_PAREXPN) || 1010 ((sdp->sd_flags & FLG_SY_SPECSEC) && 1011 (sdp->sd_shndx = symptr->st_shndx) == SHN_COMMON)) { 1012 1013 /* 1014 * An expanded symbol goes to a special .data section 1015 * prepared for that purpose (ofl->ofl_isparexpn). 1016 * Assign COMMON allocations to .bss. 1017 * Otherwise leave it as is. 1018 */ 1019 if (sdp->sd_flags & FLG_SY_PAREXPN) { 1020 restore = 1; 1021 sdp->sd_shndx = parexpnndx; 1022 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1023 symptr->st_value = (Xword) S_ROUND( 1024 parexpnaddr, symptr->st_value); 1025 parexpnaddr = symptr->st_value + 1026 symptr->st_size; 1027 sdp->sd_isc = ofl->ofl_isparexpn; 1028 sdp->sd_flags |= FLG_SY_COMMEXP; 1029 1030 } else if (ELF_ST_TYPE(symptr->st_info) != STT_TLS && 1031 (local || !(flags & FLG_OF_RELOBJ))) { 1032 restore = 1; 1033 sdp->sd_shndx = bssndx; 1034 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1035 symptr->st_value = (Xword)S_ROUND(bssaddr, 1036 symptr->st_value); 1037 bssaddr = symptr->st_value + symptr->st_size; 1038 sdp->sd_isc = ofl->ofl_isbss; 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 = tlsbssndx; 1045 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1046 symptr->st_value = (Xword)S_ROUND(tlsbssaddr, 1047 symptr->st_value); 1048 tlsbssaddr = symptr->st_value + symptr->st_size; 1049 sdp->sd_isc = ofl->ofl_istlsbss; 1050 sdp->sd_flags |= FLG_SY_COMMEXP; 1051 /* 1052 * TLS symbols are relative to the TLS segment. 1053 */ 1054 symptr->st_value -= ofl->ofl_tlsphdr->p_vaddr; 1055 } 1056 #if defined(_ELF64) 1057 } else if ((ld_targ.t_m.m_mach == EM_AMD64) && 1058 (sdp->sd_flags & FLG_SY_SPECSEC) && 1059 ((sdp->sd_shndx = symptr->st_shndx) == 1060 SHN_X86_64_LCOMMON) && 1061 ((local || !(flags & FLG_OF_RELOBJ)))) { 1062 restore = 1; 1063 sdp->sd_shndx = lbssndx; 1064 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1065 symptr->st_value = (Xword)S_ROUND(lbssaddr, 1066 symptr->st_value); 1067 lbssaddr = symptr->st_value + symptr->st_size; 1068 sdp->sd_isc = ofl->ofl_islbss; 1069 sdp->sd_flags |= FLG_SY_COMMEXP; 1070 #endif 1071 } 1072 1073 if (restore != 0) { 1074 uchar_t type, bind; 1075 1076 /* 1077 * Make sure this COMMON symbol is returned to the same 1078 * binding as was defined in the original relocatable 1079 * object reference. 1080 */ 1081 type = ELF_ST_TYPE(symptr->st_info); 1082 if (sdp->sd_flags & FLG_SY_GLOBREF) 1083 bind = STB_GLOBAL; 1084 else 1085 bind = STB_WEAK; 1086 1087 symptr->st_info = ELF_ST_INFO(bind, type); 1088 } 1089 } 1090 1091 if (ofl->ofl_hashbkts) { 1092 qsort(sorted_syms + ofl->ofl_scopecnt + ofl->ofl_elimcnt, 1093 ofl->ofl_globcnt, sizeof (Sym_s_list), 1094 (int (*)(const void *, const void *))sym_hash_compare); 1095 } 1096 1097 for (ssndx = 0; ssndx < (ofl->ofl_elimcnt + ofl->ofl_scopecnt + 1098 ofl->ofl_globcnt); ssndx++) { 1099 const char *name; 1100 Sym *sym; 1101 Sym_aux *sap; 1102 Half spec; 1103 int local = 0, dynlocal = 0, enter_in_symtab; 1104 Gotndx *gnp; 1105 Word sectndx; 1106 1107 sdp = sorted_syms[ssndx].sl_sdp; 1108 sectndx = 0; 1109 1110 if (symtab) 1111 enter_in_symtab = 1; 1112 else 1113 enter_in_symtab = 0; 1114 1115 /* 1116 * Assign a got offset if necessary. 1117 */ 1118 if ((ld_targ.t_mr.mr_assign_got != NULL) && 1119 (*ld_targ.t_mr.mr_assign_got)(ofl, sdp) == S_ERROR) 1120 return ((Addr)S_ERROR); 1121 1122 if (DBG_ENABLED) { 1123 Aliste idx2; 1124 1125 for (ALIST_TRAVERSE(sdp->sd_GOTndxs, idx2, gnp)) { 1126 gottable->gt_sym = sdp; 1127 gottable->gt_gndx.gn_gotndx = gnp->gn_gotndx; 1128 gottable->gt_gndx.gn_addend = gnp->gn_addend; 1129 gottable++; 1130 } 1131 1132 if (sdp->sd_aux && sdp->sd_aux->sa_PLTGOTndx) { 1133 gottable->gt_sym = sdp; 1134 gottable->gt_gndx.gn_gotndx = 1135 sdp->sd_aux->sa_PLTGOTndx; 1136 gottable++; 1137 } 1138 } 1139 1140 1141 /* 1142 * If this symbol has been marked as being reduced to local 1143 * scope then it will have to be placed in the scoped portion 1144 * of the .symtab. Retain the appropriate index for use in 1145 * version symbol indexing and relocation. 1146 */ 1147 if ((sdp->sd_flags1 & FLG_SY1_HIDDEN) && 1148 (flags & FLG_OF_PROCRED)) { 1149 local = 1; 1150 if (!(sdp->sd_flags1 & FLG_SY1_ELIM) && !dynsym) 1151 sdp->sd_symndx = scopesym_ndx; 1152 else 1153 sdp->sd_symndx = 0; 1154 1155 if (sdp->sd_flags1 & FLG_SY1_ELIM) { 1156 enter_in_symtab = 0; 1157 } else if (ldynsym && sdp->sd_sym->st_name && 1158 ldynsym_symtype[ 1159 ELF_ST_TYPE(sdp->sd_sym->st_info)]) { 1160 dynlocal = 1; 1161 } 1162 } else { 1163 sdp->sd_symndx = *symndx; 1164 } 1165 1166 /* 1167 * Copy basic symbol and string information. 1168 */ 1169 name = sdp->sd_name; 1170 sap = sdp->sd_aux; 1171 1172 /* 1173 * If we require to record version symbol indexes, update the 1174 * associated version symbol information for all defined 1175 * symbols. If a version definition is required any zero value 1176 * symbol indexes would have been flagged as undefined symbol 1177 * errors, however if we're just scoping these need to fall into 1178 * the base of global symbols. 1179 */ 1180 if (sdp->sd_symndx && versym) { 1181 Half vndx = 0; 1182 1183 if (sdp->sd_flags & FLG_SY_MVTOCOMM) { 1184 vndx = VER_NDX_GLOBAL; 1185 } else if (sdp->sd_ref == REF_REL_NEED) { 1186 Half symflags1 = sdp->sd_flags1; 1187 1188 vndx = sap->sa_overndx; 1189 if ((vndx == 0) && 1190 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 1191 if (symflags1 & FLG_SY1_HIDDEN) 1192 vndx = VER_NDX_LOCAL; 1193 else 1194 vndx = VER_NDX_GLOBAL; 1195 } 1196 } else if ((sdp->sd_ref == REF_DYN_NEED) && 1197 (sap->sa_dverndx > 0) && 1198 (sap->sa_dverndx <= sdp->sd_file->ifl_vercnt) && 1199 (sdp->sd_file->ifl_verndx != NULL)) { 1200 /* Use index of verneed record */ 1201 vndx = sdp->sd_file->ifl_verndx 1202 [sap->sa_dverndx].vi_overndx; 1203 } 1204 versym[sdp->sd_symndx] = vndx; 1205 } 1206 1207 /* 1208 * If we are creating the .syminfo section then set per symbol 1209 * flags here. 1210 */ 1211 if (sdp->sd_symndx && syminfo && 1212 !(sdp->sd_flags & FLG_SY_NOTAVAIL)) { 1213 int ndx = sdp->sd_symndx; 1214 APlist **alpp = &(ofl->ofl_syminfsyms); 1215 1216 if (sdp->sd_flags & FLG_SY_MVTOCOMM) 1217 /* 1218 * Identify a copy relocation symbol. 1219 */ 1220 syminfo[ndx].si_flags |= SYMINFO_FLG_COPY; 1221 1222 if (sdp->sd_ref == REF_DYN_NEED) { 1223 /* 1224 * A reference is bound to a needed dependency. 1225 * Save the syminfo entry, so that when the 1226 * .dynamic section has been updated, a 1227 * DT_NEEDED entry can be associated 1228 * (see update_osyminfo()). 1229 */ 1230 if (aplist_append(alpp, sdp, 1231 AL_CNT_OFL_SYMINFOSYMS) == NULL) 1232 return (0); 1233 1234 /* 1235 * Flag that the symbol has a direct association 1236 * with the external reference (this is an old 1237 * tagging, that has no real effect by itself). 1238 * And flag whether this reference is lazy 1239 * loadable. 1240 */ 1241 syminfo[ndx].si_flags |= SYMINFO_FLG_DIRECT; 1242 if (sdp->sd_flags & FLG_SY_LAZYLD) 1243 syminfo[ndx].si_flags |= 1244 SYMINFO_FLG_LAZYLOAD; 1245 1246 /* 1247 * Enable direct symbol bindings if: 1248 * 1249 * - Symbol was identified with the DIRECT 1250 * keyword in a mapfile. 1251 * 1252 * - Symbol reference has been bound to a 1253 * dependency which was specified as 1254 * requiring direct bindings with -zdirect. 1255 * 1256 * - All symbol references are required to 1257 * use direct bindings via -Bdirect. 1258 */ 1259 if (sdp->sd_flags1 & FLG_SY1_DIR) 1260 syminfo[ndx].si_flags |= 1261 SYMINFO_FLG_DIRECTBIND; 1262 1263 } else if ((sdp->sd_flags & FLG_SY_EXTERN) && 1264 (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 1265 /* 1266 * If this symbol has been explicitly defined 1267 * as external, and remains unresolved, mark 1268 * it as external. 1269 */ 1270 syminfo[ndx].si_boundto = SYMINFO_BT_EXTERN; 1271 1272 } else if ((sdp->sd_flags & FLG_SY_PARENT) && 1273 (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 1274 /* 1275 * If this symbol has been explicitly defined 1276 * to be a reference to a parent object, 1277 * indicate whether a direct binding should be 1278 * established. 1279 */ 1280 syminfo[ndx].si_flags |= SYMINFO_FLG_DIRECT; 1281 syminfo[ndx].si_boundto = SYMINFO_BT_PARENT; 1282 if (sdp->sd_flags1 & FLG_SY1_DIR) 1283 syminfo[ndx].si_flags |= 1284 SYMINFO_FLG_DIRECTBIND; 1285 1286 } else if (sdp->sd_flags & FLG_SY_STDFLTR) { 1287 /* 1288 * A filter definition. Although this symbol 1289 * can only be a stub, it might be necessary to 1290 * prevent external direct bindings. 1291 */ 1292 syminfo[ndx].si_flags |= SYMINFO_FLG_FILTER; 1293 if (sdp->sd_flags1 & FLG_SY1_NDIR) 1294 syminfo[ndx].si_flags |= 1295 SYMINFO_FLG_NOEXTDIRECT; 1296 1297 } else if (sdp->sd_flags & FLG_SY_AUXFLTR) { 1298 /* 1299 * An auxiliary filter definition. By nature, 1300 * this definition is direct, in that should the 1301 * filtee lookup fail, we'll fall back to this 1302 * object. It may still be necesssary to 1303 * prevent external direct bindings. 1304 */ 1305 syminfo[ndx].si_flags |= SYMINFO_FLG_AUXILIARY; 1306 if (sdp->sd_flags1 & FLG_SY1_NDIR) 1307 syminfo[ndx].si_flags |= 1308 SYMINFO_FLG_NOEXTDIRECT; 1309 1310 } else if ((sdp->sd_ref == REF_REL_NEED) && 1311 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 1312 1313 /* 1314 * This definition exists within the object 1315 * being created. Flag whether it is necessary 1316 * to prevent external direct bindings. 1317 */ 1318 if (sdp->sd_flags1 & FLG_SY1_NDIR) { 1319 syminfo[ndx].si_boundto = 1320 SYMINFO_BT_NONE; 1321 syminfo[ndx].si_flags |= 1322 SYMINFO_FLG_NOEXTDIRECT; 1323 } 1324 1325 /* 1326 * Indicate that this symbol is acting as an 1327 * individual interposer. 1328 */ 1329 if (sdp->sd_flags & FLG_SY_INTPOSE) { 1330 syminfo[ndx].si_flags |= 1331 SYMINFO_FLG_INTERPOSE; 1332 } 1333 1334 /* 1335 * If external bindings are allowed, or this is 1336 * a translator symbol, indicate the binding, 1337 * and a direct binding if necessary. 1338 */ 1339 if (((sdp->sd_flags1 & FLG_SY1_NDIR) == 0) || 1340 ((dtflags_1 & DF_1_TRANS) && sdp->sd_aux && 1341 sdp->sd_aux->sa_bindto)) { 1342 1343 syminfo[ndx].si_flags |= 1344 SYMINFO_FLG_DIRECT; 1345 1346 if (sdp->sd_flags1 & FLG_SY1_DIR) 1347 syminfo[ndx].si_flags |= 1348 SYMINFO_FLG_DIRECTBIND; 1349 1350 /* 1351 * If this is a translator, the symbols 1352 * boundto element will indicate the 1353 * dependency to which it should resolve 1354 * rather than itself. Save this info 1355 * for updating after the .dynamic 1356 * section has been created. 1357 */ 1358 if ((dtflags_1 & DF_1_TRANS) && 1359 sdp->sd_aux && 1360 sdp->sd_aux->sa_bindto) { 1361 if (aplist_append(alpp, sdp, 1362 AL_CNT_OFL_SYMINFOSYMS) == 1363 NULL) 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 /* 1410 * Provided this isn't an unnamed register symbol, 1411 * update the symbols name and hash value. 1412 */ 1413 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 1414 dynsym[dynsym_ndx].st_name) { 1415 (void) st_setstring(dynstr, name, &stoff); 1416 dynsym[dynsym_ndx].st_name = stoff; 1417 1418 if (stoff) { 1419 Word _hashndx; 1420 1421 hashval = 1422 sap->sa_hash % ofl->ofl_hashbkts; 1423 1424 /* LINTED */ 1425 if (_hashndx = hashbkt[hashval]) { 1426 while (hashchain[_hashndx]) { 1427 _hashndx = 1428 hashchain[_hashndx]; 1429 } 1430 hashchain[_hashndx] = 1431 sdp->sd_symndx; 1432 } else { 1433 hashbkt[hashval] = 1434 sdp->sd_symndx; 1435 } 1436 } 1437 } 1438 sdp->sd_sym = sym = &dynsym[dynsym_ndx]; 1439 1440 /* 1441 * Add it to sort section if it qualifies. 1442 * The indexes in that section are relative to the 1443 * the adjacent SUNW_ldynsym/dymsym pair, so we 1444 * add the number of items in SUNW_ldynsym to the 1445 * dynsym index. 1446 */ 1447 ADD_TO_DYNSORT(sdp, sym, ELF_ST_TYPE(sym->st_info), 1448 ldynsym_cnt + dynsym_ndx); 1449 } 1450 if (!enter_in_symtab && (!dynsym || (local && !dynlocal))) { 1451 if (!(sdp->sd_flags & FLG_SY_UPREQD)) 1452 continue; 1453 sym = sdp->sd_sym; 1454 } else 1455 sdp->sd_flags &= ~FLG_SY_CLEAN; 1456 1457 1458 /* 1459 * If we have a weak data symbol for which we need the real 1460 * symbol also, save this processing until later. 1461 * 1462 * The exception to this is if the weak/strong have PLT's 1463 * assigned to them. In that case we don't do the post-weak 1464 * processing because the PLT's must be maintained so that we 1465 * can do 'interpositioning' on both of the symbols. 1466 */ 1467 if ((sap->sa_linkndx) && 1468 (ELF_ST_BIND(sym->st_info) == STB_WEAK) && 1469 (!sap->sa_PLTndx)) { 1470 Sym_desc *_sdp; 1471 1472 _sdp = sdp->sd_file->ifl_oldndx[sap->sa_linkndx]; 1473 1474 if (_sdp->sd_ref != REF_DYN_SEEN) { 1475 Wk_desc wk; 1476 1477 if (enter_in_symtab) { 1478 if (local) { 1479 wk.wk_symtab = 1480 &symtab[scopesym_ndx]; 1481 scopesym_ndx++; 1482 } else { 1483 wk.wk_symtab = 1484 &symtab[symtab_ndx]; 1485 symtab_ndx++; 1486 } 1487 } else { 1488 wk.wk_symtab = NULL; 1489 } 1490 if (dynsym) { 1491 if (!local) { 1492 wk.wk_dynsym = 1493 &dynsym[dynsym_ndx]; 1494 dynsym_ndx++; 1495 } else if (dynlocal) { 1496 wk.wk_dynsym = 1497 &ldynsym[ldynscopesym_ndx]; 1498 ldynscopesym_ndx++; 1499 } 1500 } else { 1501 wk.wk_dynsym = NULL; 1502 } 1503 wk.wk_weak = sdp; 1504 wk.wk_alias = _sdp; 1505 1506 if (alist_append(&weak, &wk, 1507 sizeof (Wk_desc), AL_CNT_WEAK) == NULL) 1508 return ((Addr)S_ERROR); 1509 1510 continue; 1511 } 1512 } 1513 1514 DBG_CALL(Dbg_syms_old(ofl, sdp)); 1515 1516 spec = NULL; 1517 /* 1518 * assign new symbol value. 1519 */ 1520 sectndx = sdp->sd_shndx; 1521 if (sectndx == SHN_UNDEF) { 1522 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) && 1523 (sym->st_value != 0)) { 1524 eprintf(ofl->ofl_lml, ERR_WARNING, 1525 MSG_INTL(MSG_SYM_NOTNULL), 1526 demangle(name), sdp->sd_file->ifl_name); 1527 } 1528 1529 /* 1530 * Undefined weak global, if we are generating a static 1531 * executable, output as an absolute zero. Otherwise 1532 * leave it as is, ld.so.1 will skip symbols of this 1533 * type (this technique allows applications and 1534 * libraries to test for the existence of a symbol as an 1535 * indication of the presence or absence of certain 1536 * functionality). 1537 */ 1538 if (((flags & (FLG_OF_STATIC | FLG_OF_EXEC)) == 1539 (FLG_OF_STATIC | FLG_OF_EXEC)) && 1540 (ELF_ST_BIND(sym->st_info) == STB_WEAK)) { 1541 sdp->sd_flags |= FLG_SY_SPECSEC; 1542 sdp->sd_shndx = sectndx = SHN_ABS; 1543 } 1544 } else if ((sdp->sd_flags & FLG_SY_SPECSEC) && 1545 (sectndx == SHN_COMMON)) { 1546 /* COMMONs have already been processed */ 1547 /* EMPTY */ 1548 ; 1549 } else { 1550 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 1551 (sectndx == SHN_ABS)) 1552 spec = sdp->sd_aux->sa_symspec; 1553 1554 /* LINTED */ 1555 if (sdp->sd_flags & FLG_SY_COMMEXP) { 1556 /* 1557 * This is (or was) a COMMON symbol which was 1558 * processed above - no processing 1559 * required here. 1560 */ 1561 ; 1562 } else if (sdp->sd_ref == REF_DYN_NEED) { 1563 uchar_t type, bind; 1564 1565 sectndx = SHN_UNDEF; 1566 sym->st_value = 0; 1567 sym->st_size = 0; 1568 1569 /* 1570 * Make sure this undefined symbol is returned 1571 * to the same binding as was defined in the 1572 * original relocatable object reference. 1573 */ 1574 type = ELF_ST_TYPE(sym-> st_info); 1575 if (sdp->sd_flags & FLG_SY_GLOBREF) 1576 bind = STB_GLOBAL; 1577 else 1578 bind = STB_WEAK; 1579 1580 sym->st_info = ELF_ST_INFO(bind, type); 1581 1582 } else if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1583 (sdp->sd_ref == REF_REL_NEED)) { 1584 osp = sdp->sd_isc->is_osdesc; 1585 /* LINTED */ 1586 sectndx = elf_ndxscn(osp->os_scn); 1587 1588 /* 1589 * In an executable, the new symbol value is the 1590 * old value (offset into defining section) plus 1591 * virtual address of defining section. In a 1592 * relocatable, the new value is the old value 1593 * plus the displacement of the section within 1594 * the file. 1595 */ 1596 /* LINTED */ 1597 sym->st_value += 1598 (Off)_elf_getxoff(sdp->sd_isc->is_indata); 1599 1600 if (!(flags & FLG_OF_RELOBJ)) { 1601 sym->st_value += osp->os_shdr->sh_addr; 1602 /* 1603 * TLS symbols are relative to 1604 * the TLS segment. 1605 */ 1606 if ((ELF_ST_TYPE(sym->st_info) == 1607 STT_TLS) && (ofl->ofl_tlsphdr)) 1608 sym->st_value -= 1609 ofl->ofl_tlsphdr->p_vaddr; 1610 } 1611 } 1612 } 1613 1614 if (spec) { 1615 switch (spec) { 1616 case SDAUX_ID_ETEXT: 1617 sym->st_value = etext; 1618 sectndx = etext_ndx; 1619 if (etext_abs) 1620 sdp->sd_flags |= FLG_SY_SPECSEC; 1621 else 1622 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1623 break; 1624 case SDAUX_ID_EDATA: 1625 sym->st_value = edata; 1626 sectndx = edata_ndx; 1627 if (edata_abs) 1628 sdp->sd_flags |= FLG_SY_SPECSEC; 1629 else 1630 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1631 break; 1632 case SDAUX_ID_END: 1633 sym->st_value = end; 1634 sectndx = end_ndx; 1635 if (end_abs) 1636 sdp->sd_flags |= FLG_SY_SPECSEC; 1637 else 1638 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1639 break; 1640 case SDAUX_ID_START: 1641 sym->st_value = start; 1642 sectndx = start_ndx; 1643 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1644 break; 1645 case SDAUX_ID_DYN: 1646 if (flags & FLG_OF_DYNAMIC) { 1647 sym->st_value = ofl-> 1648 ofl_osdynamic->os_shdr->sh_addr; 1649 /* LINTED */ 1650 sectndx = elf_ndxscn( 1651 ofl->ofl_osdynamic->os_scn); 1652 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1653 } 1654 break; 1655 case SDAUX_ID_PLT: 1656 if (ofl->ofl_osplt) { 1657 sym->st_value = ofl-> 1658 ofl_osplt->os_shdr->sh_addr; 1659 /* LINTED */ 1660 sectndx = elf_ndxscn( 1661 ofl->ofl_osplt->os_scn); 1662 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1663 } 1664 break; 1665 case SDAUX_ID_GOT: 1666 /* 1667 * Symbol bias for negative growing tables is 1668 * stored in symbol's value during 1669 * allocate_got(). 1670 */ 1671 sym->st_value += ofl-> 1672 ofl_osgot->os_shdr->sh_addr; 1673 /* LINTED */ 1674 sectndx = elf_ndxscn(ofl-> 1675 ofl_osgot->os_scn); 1676 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1677 break; 1678 default: 1679 /* NOTHING */ 1680 ; 1681 } 1682 } 1683 1684 /* 1685 * If a plt index has been assigned to an undefined function, 1686 * update the symbols value to the appropriate .plt address. 1687 */ 1688 if ((flags & FLG_OF_DYNAMIC) && (flags & FLG_OF_EXEC) && 1689 (sdp->sd_file) && 1690 (sdp->sd_file->ifl_ehdr->e_type == ET_DYN) && 1691 (ELF_ST_TYPE(sym->st_info) == STT_FUNC) && 1692 !(flags & FLG_OF_BFLAG)) { 1693 if (sap->sa_PLTndx) 1694 sym->st_value = 1695 (*ld_targ.t_mr.mr_calc_plt_addr)(sdp, ofl); 1696 } 1697 1698 /* 1699 * Finish updating the symbols. 1700 */ 1701 1702 /* 1703 * Sym Update: if scoped local - set local binding 1704 */ 1705 if (local) 1706 sym->st_info = ELF_ST_INFO(STB_LOCAL, 1707 ELF_ST_TYPE(sym->st_info)); 1708 1709 /* 1710 * Sym Updated: If both the .symtab and .dynsym 1711 * are present then we've actually updated the information in 1712 * the .dynsym, therefore copy this same information to the 1713 * .symtab entry. 1714 */ 1715 sdp->sd_shndx = sectndx; 1716 if (enter_in_symtab && dynsym && (!local || dynlocal)) { 1717 Word _symndx = dynlocal ? scopesym_ndx : symtab_ndx; 1718 1719 symtab[_symndx].st_value = sym->st_value; 1720 symtab[_symndx].st_size = sym->st_size; 1721 symtab[_symndx].st_info = sym->st_info; 1722 symtab[_symndx].st_other = sym->st_other; 1723 } 1724 1725 if (enter_in_symtab) { 1726 Word _symndx; 1727 1728 if (local) 1729 _symndx = scopesym_ndx++; 1730 else 1731 _symndx = symtab_ndx++; 1732 if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1733 (sectndx >= SHN_LORESERVE)) { 1734 assert(symshndx != NULL); 1735 symshndx[_symndx] = sectndx; 1736 symtab[_symndx].st_shndx = SHN_XINDEX; 1737 } else { 1738 /* LINTED */ 1739 symtab[_symndx].st_shndx = (Half)sectndx; 1740 } 1741 } 1742 1743 if (dynsym && (!local || dynlocal)) { 1744 /* 1745 * dynsym and ldynsym are distinct tables, so 1746 * we use indirection to access the right one 1747 * and the related extended section index array. 1748 */ 1749 Word _symndx; 1750 Sym *_dynsym; 1751 Word *_dynshndx; 1752 1753 if (!local) { 1754 _symndx = dynsym_ndx++; 1755 _dynsym = dynsym; 1756 _dynshndx = dynshndx; 1757 } else { 1758 _symndx = ldynscopesym_ndx++; 1759 _dynsym = ldynsym; 1760 _dynshndx = ldynshndx; 1761 } 1762 if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1763 (sectndx >= SHN_LORESERVE)) { 1764 assert(_dynshndx != NULL); 1765 _dynshndx[_symndx] = sectndx; 1766 _dynsym[_symndx].st_shndx = SHN_XINDEX; 1767 } else { 1768 /* LINTED */ 1769 _dynsym[_symndx].st_shndx = (Half)sectndx; 1770 } 1771 } 1772 1773 DBG_CALL(Dbg_syms_new(ofl, sym, sdp)); 1774 } 1775 1776 /* 1777 * Now that all the symbols have been processed update any weak symbols 1778 * information (ie. copy all information except `st_name'). As both 1779 * symbols will be represented in the output, return the weak symbol to 1780 * its correct type. 1781 */ 1782 for (ALIST_TRAVERSE(weak, idx1, wkp)) { 1783 Sym_desc *sdp, *_sdp; 1784 Sym *sym, *_sym, *__sym; 1785 uchar_t bind; 1786 1787 sdp = wkp->wk_weak; 1788 _sdp = wkp->wk_alias; 1789 _sym = __sym = _sdp->sd_sym; 1790 1791 sdp->sd_flags |= FLG_SY_WEAKDEF; 1792 1793 /* 1794 * If the symbol definition has been scoped then assign it to 1795 * be local, otherwise if it's from a shared object then we need 1796 * to maintain the binding of the original reference. 1797 */ 1798 if (sdp->sd_flags1 & FLG_SY1_HIDDEN) { 1799 if (flags & FLG_OF_PROCRED) 1800 bind = STB_LOCAL; 1801 else 1802 bind = STB_WEAK; 1803 } else if ((sdp->sd_ref == REF_DYN_NEED) && 1804 (sdp->sd_flags & FLG_SY_GLOBREF)) 1805 bind = STB_GLOBAL; 1806 else 1807 bind = STB_WEAK; 1808 1809 DBG_CALL(Dbg_syms_old(ofl, sdp)); 1810 if ((sym = wkp->wk_symtab) != NULL) { 1811 sym->st_value = _sym->st_value; 1812 sym->st_size = _sym->st_size; 1813 sym->st_other = _sym->st_other; 1814 sym->st_shndx = _sym->st_shndx; 1815 sym->st_info = ELF_ST_INFO(bind, 1816 ELF_ST_TYPE(sym->st_info)); 1817 __sym = sym; 1818 } 1819 if ((sym = wkp->wk_dynsym) != NULL) { 1820 sym->st_value = _sym->st_value; 1821 sym->st_size = _sym->st_size; 1822 sym->st_other = _sym->st_other; 1823 sym->st_shndx = _sym->st_shndx; 1824 sym->st_info = ELF_ST_INFO(bind, 1825 ELF_ST_TYPE(sym->st_info)); 1826 __sym = sym; 1827 } 1828 DBG_CALL(Dbg_syms_new(ofl, __sym, sdp)); 1829 } 1830 1831 /* 1832 * Now display GOT debugging information if required. 1833 */ 1834 DBG_CALL(Dbg_got_display(ofl, 0, 0, 1835 ld_targ.t_m.m_got_xnumber, ld_targ.t_m.m_got_entsize)); 1836 1837 /* 1838 * Update the section headers information. sh_info is 1839 * supposed to contain the offset at which the first 1840 * global symbol resides in the symbol table, while 1841 * sh_link contains the section index of the associated 1842 * string table. 1843 */ 1844 if (symtab) { 1845 Shdr *shdr = ofl->ofl_ossymtab->os_shdr; 1846 1847 shdr->sh_info = symtab_gbl_bndx; 1848 /* LINTED */ 1849 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osstrtab->os_scn); 1850 if (symshndx) { 1851 shdr = ofl->ofl_ossymshndx->os_shdr; 1852 shdr->sh_link = 1853 (Word)elf_ndxscn(ofl->ofl_ossymtab->os_scn); 1854 } 1855 1856 /* 1857 * Ensure that the expected number of symbols 1858 * were entered into the right spots: 1859 * - Scoped symbols in the right range 1860 * - Globals start at the right spot 1861 * (correct number of locals entered) 1862 * - The table is exactly filled 1863 * (correct number of globals entered) 1864 */ 1865 assert((scopesym_bndx + ofl->ofl_scopecnt) == scopesym_ndx); 1866 assert(shdr->sh_info == (ofl->ofl_shdrcnt + 1867 ofl->ofl_locscnt + ofl->ofl_scopecnt + 2)); 1868 assert((shdr->sh_info + ofl->ofl_globcnt) == symtab_ndx); 1869 } 1870 if (dynsym) { 1871 Shdr *shdr = ofl->ofl_osdynsym->os_shdr; 1872 1873 shdr->sh_info = 1 + ofl->ofl_dynshdrcnt + ofl->ofl_lregsymcnt; 1874 /* LINTED */ 1875 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 1876 1877 ofl->ofl_oshash->os_shdr->sh_link = 1878 /* LINTED */ 1879 (Word)elf_ndxscn(ofl->ofl_osdynsym->os_scn); 1880 if (dynshndx) { 1881 shdr = ofl->ofl_osdynshndx->os_shdr; 1882 shdr->sh_link = 1883 (Word)elf_ndxscn(ofl->ofl_osdynsym->os_scn); 1884 } 1885 } 1886 if (ldynsym) { 1887 Shdr *shdr = ofl->ofl_osldynsym->os_shdr; 1888 1889 /* ldynsym has no globals, so give index one past the end */ 1890 shdr->sh_info = ldynsym_ndx; 1891 1892 /* 1893 * The ldynsym and dynsym must be adjacent. The 1894 * idea is that rtld should be able to start with 1895 * the ldynsym and march straight through the end 1896 * of dynsym, seeing them as a single symbol table, 1897 * despite the fact that they are in distinct sections. 1898 * Ensure that this happened correctly. 1899 * 1900 * Note that I use ldynsym_ndx here instead of the 1901 * computation I used to set the section size 1902 * (found in ldynsym_cnt). The two will agree, unless 1903 * we somehow miscounted symbols or failed to insert them 1904 * all. Using ldynsym_ndx here catches that error in 1905 * addition to checking for adjacency. 1906 */ 1907 assert(dynsym == (ldynsym + ldynsym_ndx)); 1908 1909 1910 /* LINTED */ 1911 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 1912 1913 if (ldynshndx) { 1914 shdr = ofl->ofl_osldynshndx->os_shdr; 1915 shdr->sh_link = 1916 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 1917 } 1918 1919 /* 1920 * The presence of .SUNW_ldynsym means that there may be 1921 * associated sort sections, one for regular symbols 1922 * and the other for TLS. Each sort section needs the 1923 * following done: 1924 * - Section header link references .SUNW_ldynsym 1925 * - Should have received the expected # of items 1926 * - Sorted by increasing address 1927 */ 1928 if (ofl->ofl_osdynsymsort) { /* .SUNW_dynsymsort */ 1929 ofl->ofl_osdynsymsort->os_shdr->sh_link = 1930 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 1931 assert(ofl->ofl_dynsymsortcnt == dynsymsort_ndx); 1932 1933 if (dynsymsort_ndx > 1) { 1934 dynsort_compare_syms = ldynsym; 1935 qsort(dynsymsort, dynsymsort_ndx, 1936 sizeof (*dynsymsort), dynsort_compare); 1937 dynsort_dupwarn(ofl, ldynsym, 1938 st_getstrbuf(dynstr), 1939 dynsymsort, dynsymsort_ndx, 1940 MSG_ORIG(MSG_SCN_DYNSYMSORT)); 1941 } 1942 } 1943 if (ofl->ofl_osdyntlssort) { /* .SUNW_dyntlssort */ 1944 ofl->ofl_osdyntlssort->os_shdr->sh_link = 1945 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 1946 assert(ofl->ofl_dyntlssortcnt == dyntlssort_ndx); 1947 1948 if (dyntlssort_ndx > 1) { 1949 dynsort_compare_syms = ldynsym; 1950 qsort(dyntlssort, dyntlssort_ndx, 1951 sizeof (*dyntlssort), dynsort_compare); 1952 dynsort_dupwarn(ofl, ldynsym, 1953 st_getstrbuf(dynstr), 1954 dyntlssort, dyntlssort_ndx, 1955 MSG_ORIG(MSG_SCN_DYNTLSSORT)); 1956 } 1957 } 1958 } 1959 1960 /* 1961 * Used by ld.so.1 only. 1962 */ 1963 return (etext); 1964 1965 #undef ADD_TO_DYNSORT 1966 } 1967 1968 /* 1969 * Build the dynamic section. 1970 * 1971 * This routine must be maintained in parallel with make_dynamic() 1972 * in sections.c 1973 */ 1974 static int 1975 update_odynamic(Ofl_desc *ofl) 1976 { 1977 Aliste idx; 1978 Ifl_desc *ifl; 1979 Sym_desc *sdp; 1980 Shdr *shdr; 1981 Dyn *_dyn = (Dyn *)ofl->ofl_osdynamic->os_outdata->d_buf; 1982 Dyn *dyn; 1983 Str_tbl *dynstr; 1984 size_t stoff; 1985 ofl_flag_t flags = ofl->ofl_flags; 1986 int not_relobj = !(flags & FLG_OF_RELOBJ); 1987 Word cnt; 1988 1989 /* 1990 * A relocatable object with a dynamic section is possible, though 1991 * rare. One use for this feature is to produce drivers 1992 * for the kernel, loaded by krtld. 1993 * 1994 * Only a limited subset of DT_ entries apply to relocatable 1995 * objects: 1996 * 1997 * DT_NEEDED 1998 * DT_RUNPATH/DT_RPATH 1999 * DT_FLAGS 2000 * DT_FLAGS1 2001 * DT_SUNW_STRPAD 2002 * DT_LDMACH 2003 */ 2004 dynstr = ofl->ofl_dynstrtab; 2005 ofl->ofl_osdynamic->os_shdr->sh_link = 2006 /* LINTED */ 2007 (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 2008 2009 dyn = _dyn; 2010 2011 for (APLIST_TRAVERSE(ofl->ofl_sos, idx, ifl)) { 2012 if ((ifl->ifl_flags & 2013 (FLG_IF_IGNORE | FLG_IF_DEPREQD)) == FLG_IF_IGNORE) 2014 continue; 2015 2016 /* 2017 * Create and set up the DT_POSFLAG_1 entry here if required. 2018 */ 2019 if ((ifl->ifl_flags & (FLG_IF_LAZYLD|FLG_IF_GRPPRM)) && 2020 (ifl->ifl_flags & (FLG_IF_NEEDED)) && not_relobj) { 2021 dyn->d_tag = DT_POSFLAG_1; 2022 if (ifl->ifl_flags & FLG_IF_LAZYLD) 2023 dyn->d_un.d_val = DF_P1_LAZYLOAD; 2024 if (ifl->ifl_flags & FLG_IF_GRPPRM) 2025 dyn->d_un.d_val |= DF_P1_GROUPPERM; 2026 dyn++; 2027 } 2028 2029 if (ifl->ifl_flags & (FLG_IF_NEEDED | FLG_IF_NEEDSTR)) 2030 dyn->d_tag = DT_NEEDED; 2031 else 2032 continue; 2033 2034 (void) st_setstring(dynstr, ifl->ifl_soname, &stoff); 2035 dyn->d_un.d_val = stoff; 2036 /* LINTED */ 2037 ifl->ifl_neededndx = (Half)(((uintptr_t)dyn - (uintptr_t)_dyn) / 2038 sizeof (Dyn)); 2039 dyn++; 2040 } 2041 2042 if (not_relobj) { 2043 if (ofl->ofl_dtsfltrs != NULL) { 2044 Dfltr_desc *dftp; 2045 2046 for (ALIST_TRAVERSE(ofl->ofl_dtsfltrs, idx, dftp)) { 2047 if (dftp->dft_flag == FLG_SY_AUXFLTR) 2048 dyn->d_tag = DT_SUNW_AUXILIARY; 2049 else 2050 dyn->d_tag = DT_SUNW_FILTER; 2051 2052 (void) st_setstring(dynstr, dftp->dft_str, 2053 &stoff); 2054 dyn->d_un.d_val = stoff; 2055 dftp->dft_ndx = (Half)(((uintptr_t)dyn - 2056 (uintptr_t)_dyn) / sizeof (Dyn)); 2057 dyn++; 2058 } 2059 } 2060 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_INIT_U), 2061 SYM_NOHASH, 0, ofl)) != NULL) && 2062 (sdp->sd_ref == REF_REL_NEED) && 2063 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 2064 dyn->d_tag = DT_INIT; 2065 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2066 dyn++; 2067 } 2068 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_FINI_U), 2069 SYM_NOHASH, 0, ofl)) != NULL) && 2070 (sdp->sd_ref == REF_REL_NEED) && 2071 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 2072 dyn->d_tag = DT_FINI; 2073 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2074 dyn++; 2075 } 2076 if (ofl->ofl_soname) { 2077 dyn->d_tag = DT_SONAME; 2078 (void) st_setstring(dynstr, ofl->ofl_soname, &stoff); 2079 dyn->d_un.d_val = stoff; 2080 dyn++; 2081 } 2082 if (ofl->ofl_filtees) { 2083 if (flags & FLG_OF_AUX) { 2084 dyn->d_tag = DT_AUXILIARY; 2085 } else { 2086 dyn->d_tag = DT_FILTER; 2087 } 2088 (void) st_setstring(dynstr, ofl->ofl_filtees, &stoff); 2089 dyn->d_un.d_val = stoff; 2090 dyn++; 2091 } 2092 } 2093 2094 if (ofl->ofl_rpath) { 2095 (void) st_setstring(dynstr, ofl->ofl_rpath, &stoff); 2096 dyn->d_tag = DT_RUNPATH; 2097 dyn->d_un.d_val = stoff; 2098 dyn++; 2099 dyn->d_tag = DT_RPATH; 2100 dyn->d_un.d_val = stoff; 2101 dyn++; 2102 } 2103 2104 if (not_relobj) { 2105 Aliste idx; 2106 2107 if (ofl->ofl_config) { 2108 dyn->d_tag = DT_CONFIG; 2109 (void) st_setstring(dynstr, ofl->ofl_config, &stoff); 2110 dyn->d_un.d_val = stoff; 2111 dyn++; 2112 } 2113 if (ofl->ofl_depaudit) { 2114 dyn->d_tag = DT_DEPAUDIT; 2115 (void) st_setstring(dynstr, ofl->ofl_depaudit, &stoff); 2116 dyn->d_un.d_val = stoff; 2117 dyn++; 2118 } 2119 if (ofl->ofl_audit) { 2120 dyn->d_tag = DT_AUDIT; 2121 (void) st_setstring(dynstr, ofl->ofl_audit, &stoff); 2122 dyn->d_un.d_val = stoff; 2123 dyn++; 2124 } 2125 2126 dyn->d_tag = DT_HASH; 2127 dyn->d_un.d_ptr = ofl->ofl_oshash->os_shdr->sh_addr; 2128 dyn++; 2129 2130 shdr = ofl->ofl_osdynstr->os_shdr; 2131 dyn->d_tag = DT_STRTAB; 2132 dyn->d_un.d_ptr = shdr->sh_addr; 2133 dyn++; 2134 2135 dyn->d_tag = DT_STRSZ; 2136 dyn->d_un.d_ptr = shdr->sh_size; 2137 dyn++; 2138 2139 shdr = ofl->ofl_osdynsym->os_shdr; 2140 dyn->d_tag = DT_SYMTAB; 2141 dyn->d_un.d_ptr = shdr->sh_addr; 2142 dyn++; 2143 2144 dyn->d_tag = DT_SYMENT; 2145 dyn->d_un.d_ptr = shdr->sh_entsize; 2146 dyn++; 2147 2148 if (ofl->ofl_osldynsym) { 2149 /* 2150 * We have arranged for the .SUNW_ldynsym data to be 2151 * immediately in front of the .dynsym data. 2152 * This means that you could start at the top 2153 * of .SUNW_ldynsym and see the data for both tables 2154 * without a break. This is the view we want to 2155 * provide for DT_SUNW_SYMTAB, which is why we 2156 * add the lengths together. 2157 */ 2158 Shdr *lshdr = ofl->ofl_osldynsym->os_shdr; 2159 dyn->d_tag = DT_SUNW_SYMTAB; 2160 dyn->d_un.d_ptr = lshdr->sh_addr; 2161 dyn++; 2162 2163 dyn->d_tag = DT_SUNW_SYMSZ; 2164 dyn->d_un.d_val = lshdr->sh_size + shdr->sh_size; 2165 dyn++; 2166 } 2167 2168 if (ofl->ofl_osdynsymsort || ofl->ofl_osdyntlssort) { 2169 dyn->d_tag = DT_SUNW_SORTENT; 2170 dyn->d_un.d_val = sizeof (Word); 2171 dyn++; 2172 } 2173 2174 if (ofl->ofl_osdynsymsort) { 2175 dyn->d_tag = DT_SUNW_SYMSORT; 2176 dyn->d_un.d_ptr = 2177 ofl->ofl_osdynsymsort->os_shdr->sh_addr; 2178 dyn++; 2179 2180 dyn->d_tag = DT_SUNW_SYMSORTSZ; 2181 dyn->d_un.d_val = 2182 ofl->ofl_osdynsymsort->os_shdr->sh_size; 2183 dyn++; 2184 } 2185 2186 if (ofl->ofl_osdyntlssort) { 2187 dyn->d_tag = DT_SUNW_TLSSORT; 2188 dyn->d_un.d_ptr = 2189 ofl->ofl_osdyntlssort->os_shdr->sh_addr; 2190 dyn++; 2191 2192 dyn->d_tag = DT_SUNW_TLSSORTSZ; 2193 dyn->d_un.d_val = 2194 ofl->ofl_osdyntlssort->os_shdr->sh_size; 2195 dyn++; 2196 } 2197 2198 /* 2199 * Reserve the DT_CHECKSUM entry. Its value will be filled in 2200 * after the complete image is built. 2201 */ 2202 dyn->d_tag = DT_CHECKSUM; 2203 ofl->ofl_checksum = &dyn->d_un.d_val; 2204 dyn++; 2205 2206 /* 2207 * Versioning sections: DT_VERDEF and DT_VERNEED. 2208 * 2209 * The Solaris ld does not produce DT_VERSYM, but the GNU ld 2210 * does, in order to support their style of versioning, which 2211 * differs from ours: 2212 * 2213 * - The top bit of the 16-bit Versym index is 2214 * not part of the version, but is interpreted 2215 * as a "hidden bit". 2216 * 2217 * - External (SHN_UNDEF) symbols can have non-zero 2218 * Versym values, which specify versions in 2219 * referenced objects, via the Verneed section. 2220 * 2221 * - The vna_other field of the Vernaux structures 2222 * found in the Verneed section are not zero as 2223 * with Solaris, but instead contain the version 2224 * index to be used by Versym indices to reference 2225 * the given external version. 2226 * 2227 * The Solaris ld, rtld, and elfdump programs all interpret the 2228 * presence of DT_VERSYM as meaning that GNU versioning rules 2229 * apply to the given file. If DT_VERSYM is not present, 2230 * then Solaris versioning rules apply. If we should ever need 2231 * to change our ld so that it does issue DT_VERSYM, then 2232 * this rule for detecting GNU versioning will no longer work. 2233 * In that case, we will have to invent a way to explicitly 2234 * specify the style of versioning in use, perhaps via a 2235 * new dynamic entry named something like DT_SUNW_VERSIONSTYLE, 2236 * where the d_un.d_val value specifies which style is to be 2237 * used. 2238 */ 2239 if ((flags & (FLG_OF_VERDEF | FLG_OF_NOVERSEC)) == 2240 FLG_OF_VERDEF) { 2241 shdr = ofl->ofl_osverdef->os_shdr; 2242 dyn->d_tag = DT_VERDEF; 2243 dyn->d_un.d_ptr = shdr->sh_addr; 2244 dyn++; 2245 dyn->d_tag = DT_VERDEFNUM; 2246 dyn->d_un.d_ptr = shdr->sh_info; 2247 dyn++; 2248 } 2249 if ((flags & (FLG_OF_VERNEED | FLG_OF_NOVERSEC)) == 2250 FLG_OF_VERNEED) { 2251 shdr = ofl->ofl_osverneed->os_shdr; 2252 dyn->d_tag = DT_VERNEED; 2253 dyn->d_un.d_ptr = shdr->sh_addr; 2254 dyn++; 2255 dyn->d_tag = DT_VERNEEDNUM; 2256 dyn->d_un.d_ptr = shdr->sh_info; 2257 dyn++; 2258 } 2259 2260 if ((flags & FLG_OF_COMREL) && ofl->ofl_relocrelcnt) { 2261 dyn->d_tag = ld_targ.t_m.m_rel_dt_count; 2262 dyn->d_un.d_val = ofl->ofl_relocrelcnt; 2263 dyn++; 2264 } 2265 if (flags & FLG_OF_TEXTREL) { 2266 /* 2267 * Only the presence of this entry is used in this 2268 * implementation, not the value stored. 2269 */ 2270 dyn->d_tag = DT_TEXTREL; 2271 dyn->d_un.d_val = 0; 2272 dyn++; 2273 } 2274 2275 if (ofl->ofl_osfiniarray) { 2276 shdr = ofl->ofl_osfiniarray->os_shdr; 2277 2278 dyn->d_tag = DT_FINI_ARRAY; 2279 dyn->d_un.d_ptr = shdr->sh_addr; 2280 dyn++; 2281 2282 dyn->d_tag = DT_FINI_ARRAYSZ; 2283 dyn->d_un.d_val = shdr->sh_size; 2284 dyn++; 2285 } 2286 2287 if (ofl->ofl_osinitarray) { 2288 shdr = ofl->ofl_osinitarray->os_shdr; 2289 2290 dyn->d_tag = DT_INIT_ARRAY; 2291 dyn->d_un.d_ptr = shdr->sh_addr; 2292 dyn++; 2293 2294 dyn->d_tag = DT_INIT_ARRAYSZ; 2295 dyn->d_un.d_val = shdr->sh_size; 2296 dyn++; 2297 } 2298 2299 if (ofl->ofl_ospreinitarray) { 2300 shdr = ofl->ofl_ospreinitarray->os_shdr; 2301 2302 dyn->d_tag = DT_PREINIT_ARRAY; 2303 dyn->d_un.d_ptr = shdr->sh_addr; 2304 dyn++; 2305 2306 dyn->d_tag = DT_PREINIT_ARRAYSZ; 2307 dyn->d_un.d_val = shdr->sh_size; 2308 dyn++; 2309 } 2310 2311 if (ofl->ofl_pltcnt) { 2312 shdr = ofl->ofl_osplt->os_relosdesc->os_shdr; 2313 2314 dyn->d_tag = DT_PLTRELSZ; 2315 dyn->d_un.d_ptr = shdr->sh_size; 2316 dyn++; 2317 dyn->d_tag = DT_PLTREL; 2318 dyn->d_un.d_ptr = ld_targ.t_m.m_rel_dt_type; 2319 dyn++; 2320 dyn->d_tag = DT_JMPREL; 2321 dyn->d_un.d_ptr = shdr->sh_addr; 2322 dyn++; 2323 } 2324 if (ofl->ofl_pltpad) { 2325 shdr = ofl->ofl_osplt->os_shdr; 2326 2327 dyn->d_tag = DT_PLTPAD; 2328 if (ofl->ofl_pltcnt) { 2329 dyn->d_un.d_ptr = shdr->sh_addr + 2330 ld_targ.t_m.m_plt_reservsz + 2331 ofl->ofl_pltcnt * ld_targ.t_m.m_plt_entsize; 2332 } else 2333 dyn->d_un.d_ptr = shdr->sh_addr; 2334 dyn++; 2335 dyn->d_tag = DT_PLTPADSZ; 2336 dyn->d_un.d_val = ofl->ofl_pltpad * 2337 ld_targ.t_m.m_plt_entsize; 2338 dyn++; 2339 } 2340 if (ofl->ofl_relocsz) { 2341 dyn->d_tag = ld_targ.t_m.m_rel_dt_type; 2342 dyn->d_un.d_ptr = ofl->ofl_osrelhead->os_shdr->sh_addr; 2343 dyn++; 2344 dyn->d_tag = ld_targ.t_m.m_rel_dt_size; 2345 dyn->d_un.d_ptr = ofl->ofl_relocsz; 2346 dyn++; 2347 dyn->d_tag = ld_targ.t_m.m_rel_dt_ent; 2348 if (ofl->ofl_osrelhead->os_shdr->sh_type == SHT_REL) 2349 dyn->d_un.d_ptr = sizeof (Rel); 2350 else 2351 dyn->d_un.d_ptr = sizeof (Rela); 2352 dyn++; 2353 } 2354 if (ofl->ofl_ossyminfo) { 2355 shdr = ofl->ofl_ossyminfo->os_shdr; 2356 dyn->d_tag = DT_SYMINFO; 2357 dyn->d_un.d_ptr = shdr->sh_addr; 2358 dyn++; 2359 dyn->d_tag = DT_SYMINSZ; 2360 dyn->d_un.d_val = shdr->sh_size; 2361 dyn++; 2362 dyn->d_tag = DT_SYMINENT; 2363 dyn->d_un.d_val = sizeof (Syminfo); 2364 dyn++; 2365 } 2366 if (ofl->ofl_osmove) { 2367 Os_desc *osp; 2368 2369 dyn->d_tag = DT_MOVEENT; 2370 osp = ofl->ofl_osmove; 2371 dyn->d_un.d_val = osp->os_shdr->sh_entsize; 2372 dyn++; 2373 dyn->d_tag = DT_MOVESZ; 2374 dyn->d_un.d_val = osp->os_shdr->sh_size; 2375 dyn++; 2376 dyn->d_tag = DT_MOVETAB; 2377 dyn->d_un.d_val = osp->os_shdr->sh_addr; 2378 dyn++; 2379 } 2380 if (ofl->ofl_regsymcnt) { 2381 int ndx; 2382 2383 for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 2384 if ((sdp = ofl->ofl_regsyms[ndx]) == NULL) 2385 continue; 2386 2387 dyn->d_tag = ld_targ.t_m.m_dt_register; 2388 dyn->d_un.d_val = sdp->sd_symndx; 2389 dyn++; 2390 } 2391 } 2392 2393 for (APLIST_TRAVERSE(ofl->ofl_rtldinfo, idx, sdp)) { 2394 dyn->d_tag = DT_SUNW_RTLDINF; 2395 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2396 dyn++; 2397 } 2398 2399 if (ofl->ofl_osdynamic->os_sgdesc && 2400 (ofl->ofl_osdynamic->os_sgdesc->sg_phdr.p_flags & PF_W)) { 2401 if (ofl->ofl_osinterp) { 2402 dyn->d_tag = DT_DEBUG; 2403 dyn->d_un.d_ptr = 0; 2404 dyn++; 2405 } 2406 2407 dyn->d_tag = DT_FEATURE_1; 2408 if (ofl->ofl_osmove) 2409 dyn->d_un.d_val = 0; 2410 else 2411 dyn->d_un.d_val = DTF_1_PARINIT; 2412 dyn++; 2413 } 2414 2415 if (ofl->ofl_oscap) { 2416 dyn->d_tag = DT_SUNW_CAP; 2417 dyn->d_un.d_val = ofl->ofl_oscap->os_shdr->sh_addr; 2418 dyn++; 2419 } 2420 2421 if (flags & FLG_OF_SYMBOLIC) { 2422 dyn->d_tag = DT_SYMBOLIC; 2423 dyn->d_un.d_val = 0; 2424 dyn++; 2425 } 2426 } 2427 2428 dyn->d_tag = DT_FLAGS; 2429 dyn->d_un.d_val = ofl->ofl_dtflags; 2430 dyn++; 2431 2432 /* 2433 * If -Bdirect was specified, but some NODIRECT symbols were specified 2434 * via a mapfile, or -znodirect was used on the command line, then 2435 * clear the DF_1_DIRECT flag. The resultant object will use per-symbol 2436 * direct bindings rather than be enabled for global direct bindings. 2437 * 2438 * If any no-direct bindings exist within this object, set the 2439 * DF_1_NODIRECT flag. ld(1) recognizes this flag when processing 2440 * dependencies, and performs extra work to ensure that no direct 2441 * bindings are established to the no-direct symbols that exist 2442 * within these dependencies. 2443 */ 2444 if (ofl->ofl_flags1 & FLG_OF1_NGLBDIR) 2445 ofl->ofl_dtflags_1 &= ~DF_1_DIRECT; 2446 if (ofl->ofl_flags1 & FLG_OF1_NDIRECT) 2447 ofl->ofl_dtflags_1 |= DF_1_NODIRECT; 2448 2449 dyn->d_tag = DT_FLAGS_1; 2450 dyn->d_un.d_val = ofl->ofl_dtflags_1; 2451 dyn++; 2452 2453 dyn->d_tag = DT_SUNW_STRPAD; 2454 dyn->d_un.d_val = DYNSTR_EXTRA_PAD; 2455 dyn++; 2456 2457 dyn->d_tag = DT_SUNW_LDMACH; 2458 dyn->d_un.d_val = ld_sunw_ldmach(); 2459 dyn++; 2460 2461 (*ld_targ.t_mr.mr_mach_update_odynamic)(ofl, &dyn); 2462 2463 for (cnt = 1 + DYNAMIC_EXTRA_ELTS; cnt--; dyn++) { 2464 dyn->d_tag = DT_NULL; 2465 dyn->d_un.d_val = 0; 2466 } 2467 2468 /* 2469 * Ensure that we wrote the right number of entries. If not, 2470 * we either miscounted in make_dynamic(), or we did something wrong 2471 * in this function. 2472 */ 2473 assert((ofl->ofl_osdynamic->os_shdr->sh_size / 2474 ofl->ofl_osdynamic->os_shdr->sh_entsize) == 2475 ((uintptr_t)dyn - (uintptr_t)_dyn) / sizeof (*dyn)); 2476 2477 return (1); 2478 } 2479 2480 /* 2481 * Build the version definition section 2482 */ 2483 static int 2484 update_overdef(Ofl_desc *ofl) 2485 { 2486 Aliste idx1; 2487 Ver_desc *vdp, *_vdp; 2488 Verdef *vdf, *_vdf; 2489 int num = 0; 2490 Os_desc *strosp; 2491 2492 /* 2493 * Traverse the version descriptors and update the version structures 2494 * to point to the dynstr name in preparation for building the version 2495 * section structure. 2496 */ 2497 for (APLIST_TRAVERSE(ofl->ofl_verdesc, idx1, vdp)) { 2498 Sym_desc *sdp; 2499 2500 if (vdp->vd_flags & VER_FLG_BASE) { 2501 const char *name = vdp->vd_name; 2502 size_t stoff; 2503 2504 /* 2505 * Create a new string table entry to represent the base 2506 * version name (there is no corresponding symbol for 2507 * this). 2508 */ 2509 if (!(ofl->ofl_flags & FLG_OF_DYNAMIC)) { 2510 (void) st_setstring(ofl->ofl_strtab, 2511 name, &stoff); 2512 /* LINTED */ 2513 vdp->vd_name = (const char *)stoff; 2514 } else { 2515 (void) st_setstring(ofl->ofl_dynstrtab, 2516 name, &stoff); 2517 /* LINTED */ 2518 vdp->vd_name = (const char *)stoff; 2519 } 2520 } else { 2521 sdp = ld_sym_find(vdp->vd_name, vdp->vd_hash, 0, ofl); 2522 /* LINTED */ 2523 vdp->vd_name = (const char *) 2524 (uintptr_t)sdp->sd_sym->st_name; 2525 } 2526 } 2527 2528 _vdf = vdf = (Verdef *)ofl->ofl_osverdef->os_outdata->d_buf; 2529 2530 /* 2531 * Traverse the version descriptors and update the version section to 2532 * reflect each version and its associated dependencies. 2533 */ 2534 for (APLIST_TRAVERSE(ofl->ofl_verdesc, idx1, vdp)) { 2535 Aliste idx2; 2536 Half cnt = 1; 2537 Verdaux *vdap, *_vdap; 2538 2539 _vdap = vdap = (Verdaux *)(vdf + 1); 2540 2541 vdf->vd_version = VER_DEF_CURRENT; 2542 vdf->vd_flags = vdp->vd_flags & MSK_VER_USER; 2543 vdf->vd_ndx = vdp->vd_ndx; 2544 vdf->vd_hash = vdp->vd_hash; 2545 2546 /* LINTED */ 2547 vdap->vda_name = (uintptr_t)vdp->vd_name; 2548 vdap++; 2549 /* LINTED */ 2550 _vdap->vda_next = (Word)((uintptr_t)vdap - (uintptr_t)_vdap); 2551 2552 /* 2553 * Traverse this versions dependency list generating the 2554 * appropriate version dependency entries. 2555 */ 2556 for (APLIST_TRAVERSE(vdp->vd_deps, idx2, _vdp)) { 2557 /* LINTED */ 2558 vdap->vda_name = (uintptr_t)_vdp->vd_name; 2559 _vdap = vdap; 2560 vdap++, cnt++; 2561 /* LINTED */ 2562 _vdap->vda_next = (Word)((uintptr_t)vdap - 2563 (uintptr_t)_vdap); 2564 } 2565 _vdap->vda_next = 0; 2566 2567 /* 2568 * Record the versions auxiliary array offset and the associated 2569 * dependency count. 2570 */ 2571 /* LINTED */ 2572 vdf->vd_aux = (Word)((uintptr_t)(vdf + 1) - (uintptr_t)vdf); 2573 vdf->vd_cnt = cnt; 2574 2575 /* 2576 * Record the next versions offset and update the version 2577 * pointer. Remember the previous version offset as the very 2578 * last structures next pointer should be null. 2579 */ 2580 _vdf = vdf; 2581 vdf = (Verdef *)vdap, num++; 2582 /* LINTED */ 2583 _vdf->vd_next = (Word)((uintptr_t)vdf - (uintptr_t)_vdf); 2584 } 2585 _vdf->vd_next = 0; 2586 2587 /* 2588 * Record the string table association with the version definition 2589 * section, and the symbol table associated with the version symbol 2590 * table (the actual contents of the version symbol table are filled 2591 * in during symbol update). 2592 */ 2593 if ((ofl->ofl_flags & FLG_OF_RELOBJ) || 2594 (ofl->ofl_flags & FLG_OF_STATIC)) { 2595 strosp = ofl->ofl_osstrtab; 2596 } else { 2597 strosp = ofl->ofl_osdynstr; 2598 } 2599 /* LINTED */ 2600 ofl->ofl_osverdef->os_shdr->sh_link = (Word)elf_ndxscn(strosp->os_scn); 2601 2602 /* 2603 * The version definition sections `info' field is used to indicate the 2604 * number of entries in this section. 2605 */ 2606 ofl->ofl_osverdef->os_shdr->sh_info = num; 2607 2608 return (1); 2609 } 2610 2611 /* 2612 * Finish the version symbol index section 2613 */ 2614 static int 2615 update_oversym(Ofl_desc *ofl) 2616 { 2617 Os_desc *symosp; 2618 2619 /* 2620 * Record the string table association with the version definition 2621 * section, and the symbol table associated with the version symbol 2622 * table (the actual contents of the version symbol table are filled 2623 * in during symbol update). 2624 */ 2625 if ((ofl->ofl_flags & FLG_OF_RELOBJ) || 2626 (ofl->ofl_flags & FLG_OF_STATIC)) { 2627 symosp = ofl->ofl_ossymtab; 2628 } else { 2629 symosp = ofl->ofl_osdynsym; 2630 } 2631 2632 /* LINTED */ 2633 ofl->ofl_osversym->os_shdr->sh_link = (Word)elf_ndxscn(symosp->os_scn); 2634 2635 return (1); 2636 } 2637 2638 /* 2639 * Build the version needed section 2640 */ 2641 static int 2642 update_overneed(Ofl_desc *ofl) 2643 { 2644 Aliste idx1; 2645 Ifl_desc *ifl; 2646 Verneed *vnd, *_vnd; 2647 Str_tbl *dynstr; 2648 Word num = 0; 2649 2650 dynstr = ofl->ofl_dynstrtab; 2651 _vnd = vnd = (Verneed *)ofl->ofl_osverneed->os_outdata->d_buf; 2652 2653 /* 2654 * Traverse the shared object list looking for dependencies that have 2655 * versions defined within them. 2656 */ 2657 for (APLIST_TRAVERSE(ofl->ofl_sos, idx1, ifl)) { 2658 Half _cnt; 2659 Word cnt = 0; 2660 Vernaux *_vnap, *vnap; 2661 size_t stoff; 2662 2663 if (!(ifl->ifl_flags & FLG_IF_VERNEED)) 2664 continue; 2665 2666 vnd->vn_version = VER_NEED_CURRENT; 2667 2668 (void) st_setstring(dynstr, ifl->ifl_soname, &stoff); 2669 vnd->vn_file = stoff; 2670 2671 _vnap = vnap = (Vernaux *)(vnd + 1); 2672 2673 /* 2674 * Traverse the version index list recording 2675 * each version as a needed dependency. 2676 */ 2677 for (_cnt = 0; _cnt <= ifl->ifl_vercnt; _cnt++) { 2678 Ver_index *vip = &ifl->ifl_verndx[_cnt]; 2679 2680 if (vip->vi_flags & FLG_VER_REFER) { 2681 (void) st_setstring(dynstr, vip->vi_name, 2682 &stoff); 2683 vnap->vna_name = stoff; 2684 2685 if (vip->vi_desc) { 2686 vnap->vna_hash = vip->vi_desc->vd_hash; 2687 vnap->vna_flags = 2688 vip->vi_desc->vd_flags; 2689 } else { 2690 vnap->vna_hash = 0; 2691 vnap->vna_flags = 0; 2692 } 2693 vnap->vna_other = vip->vi_overndx; 2694 2695 /* 2696 * If version A inherits version B, then 2697 * B is implicit in A. It suffices for ld.so.1 2698 * to verify A at runtime and skip B. The 2699 * version normalization process sets the INFO 2700 * flag for the versions we want ld.so.1 to 2701 * skip. 2702 */ 2703 if (vip->vi_flags & VER_FLG_INFO) 2704 vnap->vna_flags |= VER_FLG_INFO; 2705 2706 _vnap = vnap; 2707 vnap++, cnt++; 2708 _vnap->vna_next = 2709 /* LINTED */ 2710 (Word)((uintptr_t)vnap - (uintptr_t)_vnap); 2711 } 2712 } 2713 2714 _vnap->vna_next = 0; 2715 2716 /* 2717 * Record the versions auxiliary array offset and 2718 * the associated dependency count. 2719 */ 2720 /* LINTED */ 2721 vnd->vn_aux = (Word)((uintptr_t)(vnd + 1) - (uintptr_t)vnd); 2722 /* LINTED */ 2723 vnd->vn_cnt = (Half)cnt; 2724 2725 /* 2726 * Record the next versions offset and update the version 2727 * pointer. Remember the previous version offset as the very 2728 * last structures next pointer should be null. 2729 */ 2730 _vnd = vnd; 2731 vnd = (Verneed *)vnap, num++; 2732 /* LINTED */ 2733 _vnd->vn_next = (Word)((uintptr_t)vnd - (uintptr_t)_vnd); 2734 } 2735 _vnd->vn_next = 0; 2736 2737 /* 2738 * Record association on string table section and use the 2739 * `info' field to indicate the number of entries in this 2740 * section. 2741 */ 2742 ofl->ofl_osverneed->os_shdr->sh_link = 2743 /* LINTED */ 2744 (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 2745 ofl->ofl_osverneed->os_shdr->sh_info = num; 2746 2747 return (1); 2748 } 2749 2750 2751 /* 2752 * Update syminfo section. 2753 */ 2754 static uintptr_t 2755 update_osyminfo(Ofl_desc *ofl) 2756 { 2757 Os_desc *symosp, *infosp = ofl->ofl_ossyminfo; 2758 Syminfo *sip = infosp->os_outdata->d_buf; 2759 Shdr *shdr = infosp->os_shdr; 2760 char *strtab; 2761 Aliste idx; 2762 Sym_desc *sdp; 2763 Sfltr_desc *sftp; 2764 2765 if (ofl->ofl_flags & FLG_OF_RELOBJ) { 2766 symosp = ofl->ofl_ossymtab; 2767 strtab = ofl->ofl_osstrtab->os_outdata->d_buf; 2768 } else { 2769 symosp = ofl->ofl_osdynsym; 2770 strtab = ofl->ofl_osdynstr->os_outdata->d_buf; 2771 } 2772 2773 /* LINTED */ 2774 infosp->os_shdr->sh_link = (Word)elf_ndxscn(symosp->os_scn); 2775 if (ofl->ofl_osdynamic) 2776 infosp->os_shdr->sh_info = 2777 /* LINTED */ 2778 (Word)elf_ndxscn(ofl->ofl_osdynamic->os_scn); 2779 2780 /* 2781 * Update any references with the index into the dynamic table. 2782 */ 2783 for (APLIST_TRAVERSE(ofl->ofl_syminfsyms, idx, sdp)) { 2784 Ifl_desc *ifl; 2785 2786 if (sdp->sd_aux && sdp->sd_aux->sa_bindto) 2787 ifl = sdp->sd_aux->sa_bindto; 2788 else 2789 ifl = sdp->sd_file; 2790 sip[sdp->sd_symndx].si_boundto = ifl->ifl_neededndx; 2791 } 2792 2793 /* 2794 * Update any filtee references with the index into the dynamic table. 2795 */ 2796 for (ALIST_TRAVERSE(ofl->ofl_symfltrs, idx, sftp)) { 2797 Dfltr_desc *dftp; 2798 2799 dftp = alist_item(ofl->ofl_dtsfltrs, sftp->sft_idx); 2800 sip[sftp->sft_sdp->sd_symndx].si_boundto = dftp->dft_ndx; 2801 } 2802 2803 /* 2804 * Display debugging information about section. 2805 */ 2806 DBG_CALL(Dbg_syminfo_title(ofl->ofl_lml)); 2807 if (DBG_ENABLED) { 2808 Word _cnt, cnt = shdr->sh_size / shdr->sh_entsize; 2809 Sym *symtab = symosp->os_outdata->d_buf; 2810 Dyn *dyn; 2811 2812 if (ofl->ofl_osdynamic) 2813 dyn = ofl->ofl_osdynamic->os_outdata->d_buf; 2814 else 2815 dyn = NULL; 2816 2817 for (_cnt = 1; _cnt < cnt; _cnt++) { 2818 if (sip[_cnt].si_flags || sip[_cnt].si_boundto) 2819 /* LINTED */ 2820 DBG_CALL(Dbg_syminfo_entry(ofl->ofl_lml, _cnt, 2821 &sip[_cnt], &symtab[_cnt], strtab, dyn)); 2822 } 2823 } 2824 return (1); 2825 } 2826 2827 /* 2828 * Build the output elf header. 2829 */ 2830 static uintptr_t 2831 update_oehdr(Ofl_desc * ofl) 2832 { 2833 Ehdr *ehdr = ofl->ofl_nehdr; 2834 2835 /* 2836 * If an entry point symbol has already been established (refer 2837 * sym_validate()) simply update the elf header entry point with the 2838 * symbols value. If no entry point is defined it will have been filled 2839 * with the start address of the first section within the text segment 2840 * (refer update_outfile()). 2841 */ 2842 if (ofl->ofl_entry) 2843 ehdr->e_entry = 2844 ((Sym_desc *)(ofl->ofl_entry))->sd_sym->st_value; 2845 2846 /* 2847 * Note. it may be necessary to update the `e_flags' field in the 2848 * machine dependent section. 2849 */ 2850 ehdr->e_ident[EI_DATA] = ld_targ.t_m.m_data; 2851 ehdr->e_machine = ofl->ofl_dehdr->e_machine; 2852 ehdr->e_flags = ofl->ofl_dehdr->e_flags; 2853 ehdr->e_version = ofl->ofl_dehdr->e_version; 2854 2855 if (ehdr->e_machine != ld_targ.t_m.m_mach) { 2856 if (ehdr->e_machine != ld_targ.t_m.m_machplus) 2857 return (S_ERROR); 2858 if ((ehdr->e_flags & ld_targ.t_m.m_flagsplus) == 0) 2859 return (S_ERROR); 2860 } 2861 2862 if (ofl->ofl_flags & FLG_OF_SHAROBJ) 2863 ehdr->e_type = ET_DYN; 2864 else if (ofl->ofl_flags & FLG_OF_RELOBJ) 2865 ehdr->e_type = ET_REL; 2866 else 2867 ehdr->e_type = ET_EXEC; 2868 2869 return (1); 2870 } 2871 2872 /* 2873 * Perform move table expansion. 2874 */ 2875 static void 2876 expand_move(Ofl_desc *ofl, Sym_desc *sdp, Move *mvp) 2877 { 2878 Os_desc *osp; 2879 uchar_t *taddr, *taddr0; 2880 Sxword offset; 2881 Half cnt; 2882 uint_t stride; 2883 2884 osp = ofl->ofl_isparexpn->is_osdesc; 2885 offset = sdp->sd_sym->st_value - osp->os_shdr->sh_addr; 2886 2887 taddr0 = taddr = osp->os_outdata->d_buf; 2888 taddr += offset; 2889 taddr = taddr + mvp->m_poffset; 2890 2891 for (cnt = 0; cnt < mvp->m_repeat; cnt++) { 2892 /* LINTED */ 2893 DBG_CALL(Dbg_move_expand(ofl->ofl_lml, mvp, 2894 (Addr)(taddr - taddr0))); 2895 stride = (uint_t)mvp->m_stride + 1; 2896 2897 /* 2898 * Update the target address based upon the move entry size. 2899 * This size was validated in ld_process_move(). 2900 */ 2901 /* LINTED */ 2902 switch (ELF_M_SIZE(mvp->m_info)) { 2903 case 1: 2904 /* LINTED */ 2905 *taddr = (uchar_t)mvp->m_value; 2906 taddr += stride; 2907 break; 2908 case 2: 2909 /* LINTED */ 2910 *((Half *)taddr) = (Half)mvp->m_value; 2911 taddr += 2 * stride; 2912 break; 2913 case 4: 2914 /* LINTED */ 2915 *((Word *)taddr) = (Word)mvp->m_value; 2916 taddr += 4 * stride; 2917 break; 2918 case 8: 2919 /* LINTED */ 2920 *((u_longlong_t *)taddr) = mvp->m_value; 2921 taddr += 8 * stride; 2922 break; 2923 } 2924 } 2925 } 2926 2927 /* 2928 * Update Move sections. 2929 */ 2930 static void 2931 update_move(Ofl_desc *ofl) 2932 { 2933 Word ndx = 0; 2934 ofl_flag_t flags = ofl->ofl_flags; 2935 Move *omvp; 2936 Aliste idx1; 2937 Sym_desc *sdp; 2938 2939 /* 2940 * Determine the index of the symbol table that will be referenced by 2941 * the Move section. 2942 */ 2943 if (OFL_ALLOW_DYNSYM(ofl)) 2944 /* LINTED */ 2945 ndx = (Word) elf_ndxscn(ofl->ofl_osdynsym->os_scn); 2946 else if (!(flags & FLG_OF_STRIP) || (flags & FLG_OF_RELOBJ)) 2947 /* LINTED */ 2948 ndx = (Word) elf_ndxscn(ofl->ofl_ossymtab->os_scn); 2949 2950 /* 2951 * Update sh_link of the Move section, and point to the new Move data. 2952 */ 2953 if (ofl->ofl_osmove) { 2954 ofl->ofl_osmove->os_shdr->sh_link = ndx; 2955 omvp = (Move *)ofl->ofl_osmove->os_outdata->d_buf; 2956 } 2957 2958 /* 2959 * Update symbol entry index 2960 */ 2961 for (APLIST_TRAVERSE(ofl->ofl_parsyms, idx1, sdp)) { 2962 Aliste idx2; 2963 Mv_desc *mdp; 2964 2965 /* 2966 * Expand move table 2967 */ 2968 if (sdp->sd_flags & FLG_SY_PAREXPN) { 2969 const char *str; 2970 2971 if (flags & FLG_OF_STATIC) 2972 str = MSG_INTL(MSG_PSYM_EXPREASON1); 2973 else if (ofl->ofl_flags1 & FLG_OF1_NOPARTI) 2974 str = MSG_INTL(MSG_PSYM_EXPREASON2); 2975 else 2976 str = MSG_INTL(MSG_PSYM_EXPREASON3); 2977 2978 DBG_CALL(Dbg_move_parexpn(ofl->ofl_lml, 2979 sdp->sd_name, str)); 2980 2981 for (ALIST_TRAVERSE(sdp->sd_move, idx2, mdp)) { 2982 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 0, 2983 mdp->md_move, sdp)); 2984 expand_move(ofl, sdp, mdp->md_move); 2985 } 2986 continue; 2987 } 2988 2989 /* 2990 * Process move table 2991 */ 2992 DBG_CALL(Dbg_move_outmove(ofl->ofl_lml, sdp->sd_name)); 2993 2994 for (ALIST_TRAVERSE(sdp->sd_move, idx2, mdp)) { 2995 Move *imvp; 2996 int idx = 1; 2997 Sym *sym; 2998 2999 imvp = mdp->md_move; 3000 sym = sdp->sd_sym; 3001 3002 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 1, imvp, sdp)); 3003 3004 *omvp = *imvp; 3005 if ((flags & FLG_OF_RELOBJ) == 0) { 3006 if (ELF_ST_BIND(sym->st_info) == STB_LOCAL) { 3007 Os_desc *osp = sdp->sd_isc->is_osdesc; 3008 Word ndx = osp->os_identndx; 3009 3010 omvp->m_info = 3011 /* LINTED */ 3012 ELF_M_INFO(ndx, imvp->m_info); 3013 3014 if (ELF_ST_TYPE(sym->st_info) != 3015 STT_SECTION) { 3016 omvp->m_poffset = 3017 sym->st_value - 3018 osp->os_shdr->sh_addr + 3019 imvp->m_poffset; 3020 } 3021 } else { 3022 omvp->m_info = 3023 /* LINTED */ 3024 ELF_M_INFO(sdp->sd_symndx, 3025 imvp->m_info); 3026 } 3027 } else { 3028 Boolean isredloc = FALSE; 3029 3030 if ((ELF_ST_BIND(sym->st_info) == STB_LOCAL) && 3031 (ofl->ofl_flags & FLG_OF_REDLSYM)) 3032 isredloc = TRUE; 3033 3034 if (isredloc && !(sdp->sd_move)) { 3035 Os_desc *osp = sdp->sd_isc->is_osdesc; 3036 Word ndx = osp->os_identndx; 3037 3038 omvp->m_info = 3039 /* LINTED */ 3040 ELF_M_INFO(ndx, imvp->m_info); 3041 3042 omvp->m_poffset += sym->st_value; 3043 } else { 3044 if (isredloc) 3045 DBG_CALL(Dbg_syms_reduce(ofl, 3046 DBG_SYM_REDUCE_RETAIN, 3047 sdp, idx, 3048 ofl->ofl_osmove->os_name)); 3049 3050 omvp->m_info = 3051 /* LINTED */ 3052 ELF_M_INFO(sdp->sd_symndx, 3053 imvp->m_info); 3054 } 3055 } 3056 3057 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 0, omvp, sdp)); 3058 omvp++; 3059 idx++; 3060 } 3061 } 3062 } 3063 3064 /* 3065 * Scan through the SHT_GROUP output sections. Update their sh_link/sh_info 3066 * fields as well as the section contents. 3067 */ 3068 static uintptr_t 3069 update_ogroup(Ofl_desc *ofl) 3070 { 3071 Aliste idx; 3072 Os_desc *osp; 3073 uintptr_t error = 0; 3074 3075 for (APLIST_TRAVERSE(ofl->ofl_osgroups, idx, osp)) { 3076 Is_desc *isp; 3077 Ifl_desc *ifl; 3078 Shdr *shdr = osp->os_shdr; 3079 Sym_desc *sdp; 3080 Xword i, grpcnt; 3081 Word *gdata; 3082 3083 /* 3084 * Since input GROUP sections always create unique 3085 * output GROUP sections - we know there is only one 3086 * item on the list. 3087 */ 3088 isp = ld_os_first_isdesc(osp); 3089 3090 ifl = isp->is_file; 3091 sdp = ifl->ifl_oldndx[isp->is_shdr->sh_info]; 3092 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_ossymtab->os_scn); 3093 shdr->sh_info = sdp->sd_symndx; 3094 3095 /* 3096 * Scan through the group data section and update 3097 * all of the links to new values. 3098 */ 3099 grpcnt = shdr->sh_size / shdr->sh_entsize; 3100 gdata = (Word *)osp->os_outdata->d_buf; 3101 3102 for (i = 1; i < grpcnt; i++) { 3103 Os_desc *_osp; 3104 Is_desc *_isp = ifl->ifl_isdesc[gdata[i]]; 3105 3106 /* 3107 * If the referenced section didn't make it to the 3108 * output file - just zero out the entry. 3109 */ 3110 if ((_osp = _isp->is_osdesc) == NULL) 3111 gdata[i] = 0; 3112 else 3113 gdata[i] = (Word)elf_ndxscn(_osp->os_scn); 3114 } 3115 } 3116 return (error); 3117 } 3118 3119 static void 3120 update_ostrtab(Os_desc *osp, Str_tbl *stp, uint_t extra) 3121 { 3122 Elf_Data *data; 3123 3124 if (osp == NULL) 3125 return; 3126 3127 data = osp->os_outdata; 3128 assert(data->d_size == (st_getstrtab_sz(stp) + extra)); 3129 (void) st_setstrbuf(stp, data->d_buf, data->d_size - extra); 3130 /* If leaving an extra hole at the end, zero it */ 3131 if (extra > 0) 3132 (void) memset((char *)data->d_buf + data->d_size - extra, 3133 0x0, extra); 3134 } 3135 3136 /* 3137 * Translate the shdr->sh_{link, info} from its input section value to that 3138 * of the corresponding shdr->sh_{link, info} output section value. 3139 */ 3140 static Word 3141 translate_link(Ofl_desc *ofl, Os_desc *osp, Word link, const char *msg) 3142 { 3143 Is_desc *isp; 3144 Ifl_desc *ifl; 3145 3146 /* 3147 * Don't translate the special section numbers. 3148 */ 3149 if (link >= SHN_LORESERVE) 3150 return (link); 3151 3152 /* 3153 * Does this output section translate back to an input file. If not 3154 * then there is no translation to do. In this case we will assume that 3155 * if sh_link has a value, it's the right value. 3156 */ 3157 isp = ld_os_first_isdesc(osp); 3158 if ((ifl = isp->is_file) == NULL) 3159 return (link); 3160 3161 /* 3162 * Sanity check to make sure that the sh_{link, info} value 3163 * is within range for the input file. 3164 */ 3165 if (link >= ifl->ifl_shnum) { 3166 eprintf(ofl->ofl_lml, ERR_WARNING, msg, ifl->ifl_name, 3167 EC_WORD(isp->is_scnndx), isp->is_name, EC_XWORD(link)); 3168 return (link); 3169 } 3170 3171 /* 3172 * Follow the link to the input section. 3173 */ 3174 if ((isp = ifl->ifl_isdesc[link]) == NULL) 3175 return (0); 3176 if ((osp = isp->is_osdesc) == NULL) 3177 return (0); 3178 3179 /* LINTED */ 3180 return ((Word)elf_ndxscn(osp->os_scn)); 3181 } 3182 3183 /* 3184 * Having created all of the necessary sections, segments, and associated 3185 * headers, fill in the program headers and update any other data in the 3186 * output image. Some general rules: 3187 * 3188 * - If an interpreter is required always generate a PT_PHDR entry as 3189 * well. It is this entry that triggers the kernel into passing the 3190 * interpreter an aux vector instead of just a file descriptor. 3191 * 3192 * - When generating an image that will be interpreted (ie. a dynamic 3193 * executable, a shared object, or a static executable that has been 3194 * provided with an interpreter - weird, but possible), make the initial 3195 * loadable segment include both the ehdr and phdr[]. Both of these 3196 * tables are used by the interpreter therefore it seems more intuitive 3197 * to explicitly defined them as part of the mapped image rather than 3198 * relying on page rounding by the interpreter to allow their access. 3199 * 3200 * - When generating a static image that does not require an interpreter 3201 * have the first loadable segment indicate the address of the first 3202 * .section as the start address (things like /kernel/unix and ufsboot 3203 * expect this behavior). 3204 */ 3205 uintptr_t 3206 ld_update_outfile(Ofl_desc *ofl) 3207 { 3208 Addr size, etext, vaddr; 3209 Sg_desc *sgp; 3210 Sg_desc *dtracesgp = NULL, *capsgp = NULL, *intpsgp = NULL; 3211 Os_desc *osp; 3212 int phdrndx = 0, segndx = -1, secndx, intppndx, intpsndx; 3213 int dtracepndx, dtracesndx, cappndx, capsndx; 3214 Ehdr *ehdr = ofl->ofl_nehdr; 3215 Shdr *hshdr; 3216 Phdr *_phdr = NULL; 3217 Word phdrsz = (ehdr->e_phnum * ehdr->e_phentsize), shscnndx; 3218 ofl_flag_t flags = ofl->ofl_flags; 3219 Word ehdrsz = ehdr->e_ehsize; 3220 Boolean nobits; 3221 Off offset; 3222 Aliste idx1; 3223 3224 /* 3225 * Initialize the starting address for the first segment. Executables 3226 * have different starting addresses depending upon the target ABI, 3227 * where as shared objects have a starting address of 0. If this is 3228 * a 64-bit executable that is being constructed to run in a restricted 3229 * address space, use an alternative origin that will provide more free 3230 * address space for the the eventual process. 3231 */ 3232 if (ofl->ofl_flags & FLG_OF_EXEC) { 3233 #if defined(_ELF64) 3234 if (ofl->ofl_sfcap_1 & SF1_SUNW_ADDR32) 3235 vaddr = ld_targ.t_m.m_segm_aorigin; 3236 else 3237 #endif 3238 vaddr = ld_targ.t_m.m_segm_origin; 3239 } else 3240 vaddr = 0; 3241 3242 /* 3243 * Loop through the segment descriptors and pick out what we need. 3244 */ 3245 DBG_CALL(Dbg_seg_title(ofl->ofl_lml)); 3246 for (APLIST_TRAVERSE(ofl->ofl_segs, idx1, sgp)) { 3247 Phdr *phdr = &(sgp->sg_phdr); 3248 Xword p_align; 3249 Aliste idx2; 3250 3251 segndx++; 3252 3253 /* 3254 * If an interpreter is required generate a PT_INTERP and 3255 * PT_PHDR program header entry. The PT_PHDR entry describes 3256 * the program header table itself. This information will be 3257 * passed via the aux vector to the interpreter (ld.so.1). 3258 * The program header array is actually part of the first 3259 * loadable segment (and the PT_PHDR entry is the first entry), 3260 * therefore its virtual address isn't known until the first 3261 * loadable segment is processed. 3262 */ 3263 if (phdr->p_type == PT_PHDR) { 3264 if (ofl->ofl_osinterp) { 3265 phdr->p_offset = ehdr->e_phoff; 3266 phdr->p_filesz = phdr->p_memsz = phdrsz; 3267 3268 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3269 ofl->ofl_phdr[phdrndx++] = *phdr; 3270 } 3271 continue; 3272 } 3273 if (phdr->p_type == PT_INTERP) { 3274 if (ofl->ofl_osinterp) { 3275 intpsgp = sgp; 3276 intpsndx = segndx; 3277 intppndx = phdrndx++; 3278 } 3279 continue; 3280 } 3281 3282 /* 3283 * If we are creating a PT_SUNWDTRACE segment, remember where 3284 * the program header is. The header values are assigned after 3285 * update_osym() has completed and the symbol table addresses 3286 * have been updated. 3287 */ 3288 if (phdr->p_type == PT_SUNWDTRACE) { 3289 if (ofl->ofl_dtracesym && 3290 ((flags & FLG_OF_RELOBJ) == 0)) { 3291 dtracesgp = sgp; 3292 dtracesndx = segndx; 3293 dtracepndx = phdrndx++; 3294 } 3295 continue; 3296 } 3297 3298 /* 3299 * If a hardware/software capabilities section is required, 3300 * generate the PT_SUNWCAP header. Note, as this comes before 3301 * the first loadable segment, we don't yet know its real 3302 * virtual address. This is updated later. 3303 */ 3304 if (phdr->p_type == PT_SUNWCAP) { 3305 if (ofl->ofl_oscap) { 3306 capsgp = sgp; 3307 capsndx = segndx; 3308 cappndx = phdrndx++; 3309 } 3310 continue; 3311 } 3312 3313 /* 3314 * As the dynamic program header occurs after the loadable 3315 * headers in the segment descriptor table, all the address 3316 * information for the .dynamic output section will have been 3317 * figured out by now. 3318 */ 3319 if (phdr->p_type == PT_DYNAMIC) { 3320 if (OFL_ALLOW_DYNSYM(ofl)) { 3321 Shdr *shdr = ofl->ofl_osdynamic->os_shdr; 3322 3323 phdr->p_vaddr = shdr->sh_addr; 3324 phdr->p_offset = shdr->sh_offset; 3325 phdr->p_filesz = shdr->sh_size; 3326 phdr->p_flags = ld_targ.t_m.m_dataseg_perm; 3327 3328 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3329 ofl->ofl_phdr[phdrndx++] = *phdr; 3330 } 3331 continue; 3332 } 3333 3334 /* 3335 * As the unwind (.eh_frame_hdr) program header occurs after 3336 * the loadable headers in the segment descriptor table, all 3337 * the address information for the .eh_frame output section 3338 * will have been figured out by now. 3339 */ 3340 if (phdr->p_type == PT_SUNW_UNWIND) { 3341 Shdr *shdr; 3342 3343 if (ofl->ofl_unwindhdr == NULL) 3344 continue; 3345 3346 shdr = ofl->ofl_unwindhdr->os_shdr; 3347 3348 phdr->p_flags = PF_R; 3349 phdr->p_vaddr = shdr->sh_addr; 3350 phdr->p_memsz = shdr->sh_size; 3351 phdr->p_filesz = shdr->sh_size; 3352 phdr->p_offset = shdr->sh_offset; 3353 phdr->p_align = shdr->sh_addralign; 3354 phdr->p_paddr = 0; 3355 ofl->ofl_phdr[phdrndx++] = *phdr; 3356 continue; 3357 } 3358 3359 /* 3360 * As the TLS program header occurs after the loadable 3361 * headers in the segment descriptor table, all the address 3362 * information for the .tls output section will have been 3363 * figured out by now. 3364 */ 3365 if (phdr->p_type == PT_TLS) { 3366 Os_desc *tlsosp; 3367 Shdr *firstshdr = NULL, *lastfileshdr = NULL; 3368 Shdr *lastshdr; 3369 Aliste idx; 3370 3371 if (ofl->ofl_ostlsseg == NULL) 3372 continue; 3373 3374 /* 3375 * Scan through the sections that have contributed TLS. 3376 * Remember the first and last so as to determine the 3377 * TLS memory size requirement. Remember the last 3378 * non-nobits section to determine the TLS data 3379 * contribution, which determines the TLS file size. 3380 */ 3381 for (APLIST_TRAVERSE(ofl->ofl_ostlsseg, idx, tlsosp)) { 3382 Shdr *tlsshdr = tlsosp->os_shdr; 3383 3384 if (firstshdr == NULL) 3385 firstshdr = tlsshdr; 3386 if (tlsshdr->sh_type != SHT_NOBITS) 3387 lastfileshdr = tlsshdr; 3388 lastshdr = tlsshdr; 3389 } 3390 3391 phdr->p_flags = PF_R | PF_W; 3392 phdr->p_vaddr = firstshdr->sh_addr; 3393 phdr->p_offset = firstshdr->sh_offset; 3394 phdr->p_align = firstshdr->sh_addralign; 3395 3396 if (lastfileshdr) 3397 phdr->p_filesz = lastfileshdr->sh_offset + 3398 lastfileshdr->sh_size - phdr->p_offset; 3399 else 3400 phdr->p_filesz = 0; 3401 3402 phdr->p_memsz = lastshdr->sh_offset + 3403 lastshdr->sh_size - phdr->p_offset; 3404 3405 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3406 ofl->ofl_phdr[phdrndx] = *phdr; 3407 ofl->ofl_tlsphdr = &ofl->ofl_phdr[phdrndx++]; 3408 continue; 3409 } 3410 3411 /* 3412 * If this is an empty segment declaration, it will occur after 3413 * all other loadable segments. As empty segments can be 3414 * defind with fixed addresses, make sure that no loadable 3415 * segments overlap. This might occur as the object evolves 3416 * and the loadable segments grow, thus encroaching upon an 3417 * existing segment reservation. 3418 * 3419 * Segments are only created for dynamic objects, thus this 3420 * checking can be skipped when building a relocatable object. 3421 */ 3422 if (!(flags & FLG_OF_RELOBJ) && 3423 (sgp->sg_flags & FLG_SG_EMPTY)) { 3424 int i; 3425 Addr v_e; 3426 3427 vaddr = phdr->p_vaddr; 3428 phdr->p_memsz = sgp->sg_length; 3429 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3430 ofl->ofl_phdr[phdrndx++] = *phdr; 3431 3432 if (phdr->p_type != PT_LOAD) 3433 continue; 3434 3435 v_e = vaddr + phdr->p_memsz; 3436 3437 /* 3438 * Check overlaps 3439 */ 3440 for (i = 0; i < phdrndx - 1; i++) { 3441 Addr p_s = (ofl->ofl_phdr[i]).p_vaddr; 3442 Addr p_e; 3443 3444 if ((ofl->ofl_phdr[i]).p_type != PT_LOAD) 3445 continue; 3446 3447 p_e = p_s + (ofl->ofl_phdr[i]).p_memsz; 3448 if (((p_s <= vaddr) && (p_e > vaddr)) || 3449 ((vaddr <= p_s) && (v_e > p_s))) 3450 eprintf(ofl->ofl_lml, ERR_WARNING, 3451 MSG_INTL(MSG_UPD_SEGOVERLAP), 3452 ofl->ofl_name, EC_ADDR(p_e), 3453 sgp->sg_name, EC_ADDR(vaddr)); 3454 } 3455 continue; 3456 } 3457 3458 /* 3459 * Having processed any of the special program headers any 3460 * remaining headers will be built to express individual 3461 * segments. Segments are only built if they have output 3462 * section descriptors associated with them (ie. some form of 3463 * input section has been matched to this segment). 3464 */ 3465 if (sgp->sg_osdescs == NULL) 3466 continue; 3467 3468 /* 3469 * Determine the segments offset and size from the section 3470 * information provided from elf_update(). 3471 * Allow for multiple NOBITS sections. 3472 */ 3473 osp = sgp->sg_osdescs->apl_data[0]; 3474 hshdr = osp->os_shdr; 3475 3476 phdr->p_filesz = 0; 3477 phdr->p_memsz = 0; 3478 phdr->p_offset = offset = hshdr->sh_offset; 3479 3480 nobits = ((hshdr->sh_type == SHT_NOBITS) && 3481 ((sgp->sg_flags & FLG_SG_PHREQ) == 0)); 3482 3483 for (APLIST_TRAVERSE(sgp->sg_osdescs, idx2, osp)) { 3484 Shdr *shdr = osp->os_shdr; 3485 3486 p_align = 0; 3487 if (shdr->sh_addralign > p_align) 3488 p_align = shdr->sh_addralign; 3489 3490 offset = (Off)S_ROUND(offset, shdr->sh_addralign); 3491 offset += shdr->sh_size; 3492 3493 if (shdr->sh_type != SHT_NOBITS) { 3494 if (nobits) { 3495 eprintf(ofl->ofl_lml, ERR_FATAL, 3496 MSG_INTL(MSG_UPD_NOBITS)); 3497 return (S_ERROR); 3498 } 3499 phdr->p_filesz = offset - phdr->p_offset; 3500 } else if ((sgp->sg_flags & FLG_SG_PHREQ) == 0) 3501 nobits = TRUE; 3502 } 3503 phdr->p_memsz = offset - hshdr->sh_offset; 3504 3505 /* 3506 * If this is the first loadable segment of a dynamic object, 3507 * or an interpreter has been specified (a static object built 3508 * with an interpreter will still be given a PT_HDR entry), then 3509 * compensate for the elf header and program header array. Both 3510 * of these are actually part of the loadable segment as they 3511 * may be inspected by the interpreter. Adjust the segments 3512 * size and offset accordingly. 3513 */ 3514 if ((_phdr == NULL) && (phdr->p_type == PT_LOAD) && 3515 ((ofl->ofl_osinterp) || (flags & FLG_OF_DYNAMIC)) && 3516 (!(ofl->ofl_dtflags_1 & DF_1_NOHDR))) { 3517 size = (Addr)S_ROUND((phdrsz + ehdrsz), 3518 hshdr->sh_addralign); 3519 phdr->p_offset -= size; 3520 phdr->p_filesz += size; 3521 phdr->p_memsz += size; 3522 } 3523 3524 /* 3525 * If a segment size symbol is required (specified via a 3526 * mapfile) update its value. 3527 */ 3528 if (sgp->sg_sizesym != NULL) 3529 sgp->sg_sizesym->sd_sym->st_value = phdr->p_memsz; 3530 3531 /* 3532 * If no file content has been assigned to this segment (it 3533 * only contains no-bits sections), then reset the offset for 3534 * consistency. 3535 */ 3536 if (phdr->p_filesz == 0) 3537 phdr->p_offset = 0; 3538 3539 /* 3540 * If a virtual address has been specified for this segment 3541 * (presumably from a mapfile) use it and make sure the 3542 * previous segment does not run into this segment. 3543 */ 3544 if (phdr->p_type == PT_LOAD) { 3545 if ((sgp->sg_flags & FLG_SG_VADDR)) { 3546 if (_phdr && (vaddr > phdr->p_vaddr) && 3547 (phdr->p_type == PT_LOAD)) 3548 eprintf(ofl->ofl_lml, ERR_WARNING, 3549 MSG_INTL(MSG_UPD_SEGOVERLAP), 3550 ofl->ofl_name, EC_ADDR(vaddr), 3551 sgp->sg_name, 3552 EC_ADDR(phdr->p_vaddr)); 3553 vaddr = phdr->p_vaddr; 3554 phdr->p_align = 0; 3555 } else { 3556 vaddr = phdr->p_vaddr = 3557 (Addr)S_ROUND(vaddr, phdr->p_align); 3558 } 3559 } 3560 3561 /* 3562 * Adjust the address offset and p_align if needed. 3563 */ 3564 if (((sgp->sg_flags & FLG_SG_VADDR) == 0) && 3565 ((ofl->ofl_dtflags_1 & DF_1_NOHDR) == 0)) { 3566 if (phdr->p_align != 0) 3567 vaddr += phdr->p_offset % phdr->p_align; 3568 else 3569 vaddr += phdr->p_offset; 3570 phdr->p_vaddr = vaddr; 3571 } 3572 3573 /* 3574 * If an interpreter is required set the virtual address of the 3575 * PT_PHDR program header now that we know the virtual address 3576 * of the loadable segment that contains it. Update the 3577 * PT_SUNWCAP header similarly. 3578 */ 3579 if ((_phdr == NULL) && (phdr->p_type == PT_LOAD)) { 3580 _phdr = phdr; 3581 3582 if ((ofl->ofl_dtflags_1 & DF_1_NOHDR) == 0) { 3583 if (ofl->ofl_osinterp) 3584 ofl->ofl_phdr[0].p_vaddr = 3585 vaddr + ehdrsz; 3586 3587 /* 3588 * Finally, if we're creating a dynamic object 3589 * (or a static object in which an interpreter 3590 * is specified) update the vaddr to reflect 3591 * the address of the first section within this 3592 * segment. 3593 */ 3594 if ((ofl->ofl_osinterp) || 3595 (flags & FLG_OF_DYNAMIC)) 3596 vaddr += size; 3597 } else { 3598 /* 3599 * If the DF_1_NOHDR flag was set, and an 3600 * interpreter is being generated, the PT_PHDR 3601 * will not be part of any loadable segment. 3602 */ 3603 if (ofl->ofl_osinterp) { 3604 ofl->ofl_phdr[0].p_vaddr = 0; 3605 ofl->ofl_phdr[0].p_memsz = 0; 3606 ofl->ofl_phdr[0].p_flags = 0; 3607 } 3608 } 3609 } 3610 3611 /* 3612 * Ensure the ELF entry point defaults to zero. Typically, this 3613 * value is overridden in update_oehdr() to one of the standard 3614 * entry points. Historically, this default was set to the 3615 * address of first executable section, but this has since been 3616 * found to be more confusing than it is helpful. 3617 */ 3618 ehdr->e_entry = 0; 3619 3620 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3621 3622 /* 3623 * Traverse the output section descriptors for this segment so 3624 * that we can update the section headers addresses. We've 3625 * calculated the virtual address of the initial section within 3626 * this segment, so each successive section can be calculated 3627 * based on their offsets from each other. 3628 */ 3629 secndx = 0; 3630 hshdr = 0; 3631 for (APLIST_TRAVERSE(sgp->sg_osdescs, idx2, osp)) { 3632 Shdr *shdr = osp->os_shdr; 3633 3634 if (shdr->sh_link) 3635 shdr->sh_link = translate_link(ofl, osp, 3636 shdr->sh_link, MSG_INTL(MSG_FIL_INVSHLINK)); 3637 3638 if (shdr->sh_info && (shdr->sh_flags & SHF_INFO_LINK)) 3639 shdr->sh_info = translate_link(ofl, osp, 3640 shdr->sh_info, MSG_INTL(MSG_FIL_INVSHINFO)); 3641 3642 if (!(flags & FLG_OF_RELOBJ) && 3643 (phdr->p_type == PT_LOAD)) { 3644 if (hshdr) 3645 vaddr += (shdr->sh_offset - 3646 hshdr->sh_offset); 3647 3648 shdr->sh_addr = vaddr; 3649 hshdr = shdr; 3650 } 3651 3652 DBG_CALL(Dbg_seg_os(ofl, osp, secndx)); 3653 secndx++; 3654 } 3655 3656 /* 3657 * Establish the virtual address of the end of the last section 3658 * in this segment so that the next segments offset can be 3659 * calculated from this. 3660 */ 3661 if (hshdr) 3662 vaddr += hshdr->sh_size; 3663 3664 /* 3665 * Output sections for this segment complete. Adjust the 3666 * virtual offset for the last sections size, and make sure we 3667 * haven't exceeded any maximum segment length specification. 3668 */ 3669 if ((sgp->sg_length != 0) && (sgp->sg_length < phdr->p_memsz)) { 3670 eprintf(ofl->ofl_lml, ERR_FATAL, 3671 MSG_INTL(MSG_UPD_LARGSIZE), ofl->ofl_name, 3672 sgp->sg_name, EC_XWORD(phdr->p_memsz), 3673 EC_XWORD(sgp->sg_length)); 3674 return (S_ERROR); 3675 } 3676 3677 if (phdr->p_type == PT_NOTE) { 3678 phdr->p_vaddr = 0; 3679 phdr->p_paddr = 0; 3680 phdr->p_align = 0; 3681 phdr->p_memsz = 0; 3682 } 3683 3684 if ((phdr->p_type != PT_NULL) && !(flags & FLG_OF_RELOBJ)) 3685 ofl->ofl_phdr[phdrndx++] = *phdr; 3686 } 3687 3688 /* 3689 * Update any new output sections. When building the initial output 3690 * image, a number of sections were created but left uninitialized (eg. 3691 * .dynsym, .dynstr, .symtab, .symtab, etc.). Here we update these 3692 * sections with the appropriate data. Other sections may still be 3693 * modified via reloc_process(). 3694 * 3695 * Copy the interpreter name into the .interp section. 3696 */ 3697 if (ofl->ofl_interp) 3698 (void) strcpy((char *)ofl->ofl_osinterp->os_outdata->d_buf, 3699 ofl->ofl_interp); 3700 3701 /* 3702 * Update the .shstrtab, .strtab and .dynstr sections. 3703 */ 3704 update_ostrtab(ofl->ofl_osshstrtab, ofl->ofl_shdrsttab, 0); 3705 update_ostrtab(ofl->ofl_osstrtab, ofl->ofl_strtab, 0); 3706 update_ostrtab(ofl->ofl_osdynstr, ofl->ofl_dynstrtab, DYNSTR_EXTRA_PAD); 3707 3708 /* 3709 * Build any output symbol tables, the symbols information is copied 3710 * and updated into the new output image. 3711 */ 3712 if ((etext = update_osym(ofl)) == (Addr)S_ERROR) 3713 return (S_ERROR); 3714 3715 /* 3716 * If we have an PT_INTERP phdr, update it now from the associated 3717 * section information. 3718 */ 3719 if (intpsgp) { 3720 Phdr *phdr = &(intpsgp->sg_phdr); 3721 Shdr *shdr = ofl->ofl_osinterp->os_shdr; 3722 3723 phdr->p_vaddr = shdr->sh_addr; 3724 phdr->p_offset = shdr->sh_offset; 3725 phdr->p_memsz = phdr->p_filesz = shdr->sh_size; 3726 phdr->p_flags = PF_R; 3727 3728 DBG_CALL(Dbg_seg_entry(ofl, intpsndx, intpsgp)); 3729 ofl->ofl_phdr[intppndx] = *phdr; 3730 } 3731 3732 /* 3733 * If we have a PT_SUNWDTRACE phdr, update it now with the address of 3734 * the symbol. It's only now been updated via update_sym(). 3735 */ 3736 if (dtracesgp && ofl->ofl_dtracesym) { 3737 Phdr *aphdr, *phdr = &(dtracesgp->sg_phdr); 3738 Sym_desc *sdp = ofl->ofl_dtracesym; 3739 3740 phdr->p_vaddr = sdp->sd_sym->st_value; 3741 phdr->p_memsz = sdp->sd_sym->st_size; 3742 3743 /* 3744 * Take permisions of the segment the symbol is associated with. 3745 */ 3746 aphdr = &sdp->sd_isc->is_osdesc->os_sgdesc->sg_phdr; 3747 assert(aphdr); 3748 phdr->p_flags = aphdr->p_flags; 3749 3750 DBG_CALL(Dbg_seg_entry(ofl, dtracesndx, dtracesgp)); 3751 ofl->ofl_phdr[dtracepndx] = *phdr; 3752 } 3753 3754 /* 3755 * If we have a PT_SUNWCAP phdr, update it now from the associated 3756 * section information. 3757 */ 3758 if (capsgp && ofl->ofl_oscap) { 3759 Phdr *phdr = &(capsgp->sg_phdr); 3760 Shdr *shdr = ofl->ofl_oscap->os_shdr; 3761 3762 phdr->p_vaddr = shdr->sh_addr; 3763 phdr->p_offset = shdr->sh_offset; 3764 phdr->p_memsz = phdr->p_filesz = shdr->sh_size; 3765 phdr->p_flags = PF_R; 3766 3767 DBG_CALL(Dbg_seg_entry(ofl, capsndx, capsgp)); 3768 ofl->ofl_phdr[cappndx] = *phdr; 3769 } 3770 3771 /* 3772 * Update the GROUP sections. 3773 */ 3774 if (update_ogroup(ofl) == S_ERROR) 3775 return (S_ERROR); 3776 3777 /* 3778 * Update Move Table. 3779 */ 3780 if (ofl->ofl_osmove || ofl->ofl_isparexpn) 3781 update_move(ofl); 3782 3783 /* 3784 * Build any output headers, version information, dynamic structure and 3785 * syminfo structure. 3786 */ 3787 if (update_oehdr(ofl) == S_ERROR) 3788 return (S_ERROR); 3789 if (!(flags & FLG_OF_NOVERSEC)) { 3790 if ((flags & FLG_OF_VERDEF) && 3791 (update_overdef(ofl) == S_ERROR)) 3792 return (S_ERROR); 3793 if ((flags & FLG_OF_VERNEED) && 3794 (update_overneed(ofl) == S_ERROR)) 3795 return (S_ERROR); 3796 if ((flags & (FLG_OF_VERNEED | FLG_OF_VERDEF)) && 3797 (update_oversym(ofl) == S_ERROR)) 3798 return (S_ERROR); 3799 } 3800 if (flags & FLG_OF_DYNAMIC) { 3801 if (update_odynamic(ofl) == S_ERROR) 3802 return (S_ERROR); 3803 if (ofl->ofl_ossyminfo) 3804 if (update_osyminfo(ofl) == S_ERROR) 3805 return (S_ERROR); 3806 } 3807 3808 /* 3809 * Sanity test: First and last data byte of a string table 3810 * must be NULL. 3811 */ 3812 assert((ofl->ofl_osshstrtab == NULL) || 3813 (*((char *)ofl->ofl_osshstrtab->os_outdata->d_buf) == '\0')); 3814 assert((ofl->ofl_osshstrtab == NULL) || 3815 (*(((char *)ofl->ofl_osshstrtab->os_outdata->d_buf) + 3816 ofl->ofl_osshstrtab->os_outdata->d_size - 1) == '\0')); 3817 3818 assert((ofl->ofl_osstrtab == NULL) || 3819 (*((char *)ofl->ofl_osstrtab->os_outdata->d_buf) == '\0')); 3820 assert((ofl->ofl_osstrtab == NULL) || 3821 (*(((char *)ofl->ofl_osstrtab->os_outdata->d_buf) + 3822 ofl->ofl_osstrtab->os_outdata->d_size - 1) == '\0')); 3823 3824 assert((ofl->ofl_osdynstr == NULL) || 3825 (*((char *)ofl->ofl_osdynstr->os_outdata->d_buf) == '\0')); 3826 assert((ofl->ofl_osdynstr == NULL) || 3827 (*(((char *)ofl->ofl_osdynstr->os_outdata->d_buf) + 3828 ofl->ofl_osdynstr->os_outdata->d_size - DYNSTR_EXTRA_PAD - 1) == 3829 '\0')); 3830 3831 /* 3832 * Emit Strtab diagnostics. 3833 */ 3834 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osshstrtab, 3835 ofl->ofl_shdrsttab)); 3836 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osstrtab, 3837 ofl->ofl_strtab)); 3838 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osdynstr, 3839 ofl->ofl_dynstrtab)); 3840 3841 /* 3842 * Initialize the section headers string table index within the elf 3843 * header. 3844 */ 3845 /* LINTED */ 3846 if ((shscnndx = elf_ndxscn(ofl->ofl_osshstrtab->os_scn)) < 3847 SHN_LORESERVE) { 3848 ofl->ofl_nehdr->e_shstrndx = 3849 /* LINTED */ 3850 (Half)shscnndx; 3851 } else { 3852 /* 3853 * If the STRTAB section index doesn't fit into 3854 * e_shstrndx, then we store it in 'shdr[0].st_link'. 3855 */ 3856 Elf_Scn *scn; 3857 Shdr *shdr0; 3858 3859 if ((scn = elf_getscn(ofl->ofl_elf, 0)) == NULL) { 3860 eprintf(ofl->ofl_lml, ERR_ELF, 3861 MSG_INTL(MSG_ELF_GETSCN), ofl->ofl_name); 3862 return (S_ERROR); 3863 } 3864 if ((shdr0 = elf_getshdr(scn)) == NULL) { 3865 eprintf(ofl->ofl_lml, ERR_ELF, 3866 MSG_INTL(MSG_ELF_GETSHDR), ofl->ofl_name); 3867 return (S_ERROR); 3868 } 3869 ofl->ofl_nehdr->e_shstrndx = SHN_XINDEX; 3870 shdr0->sh_link = shscnndx; 3871 } 3872 3873 return ((uintptr_t)etext); 3874 } 3875