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 (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. 27 */ 28 29 /* 30 * Update the new output file image, perform virtual address, offset and 31 * displacement calculations on the program headers and sections headers, 32 * and generate any new output section information. 33 */ 34 35 #define ELF_TARGET_AMD64 36 37 #include <stdio.h> 38 #include <string.h> 39 #include <unistd.h> 40 #include <debug.h> 41 #include "msg.h" 42 #include "_libld.h" 43 44 /* 45 * Comparison routine used by qsort() for sorting of the global symbol list 46 * based off of the hashbuckets the symbol will eventually be deposited in. 47 */ 48 static int 49 sym_hash_compare(Sym_s_list * s1, Sym_s_list * s2) 50 { 51 return (s1->sl_hval - s2->sl_hval); 52 } 53 54 /* 55 * Comparison routine used by qsort() for sorting of dyn[sym|tls]sort section 56 * indices based on the address of the symbols they reference. The 57 * use of the global dynsort_compare_syms variable is needed because 58 * we need to examine the symbols the indices reference. It is safe, because 59 * the linker is single threaded. 60 */ 61 Sym *dynsort_compare_syms; 62 63 static int 64 dynsort_compare(const void *idx1, const void *idx2) 65 { 66 Sym *s1 = dynsort_compare_syms + *((const Word *) idx1); 67 Sym *s2 = dynsort_compare_syms + *((const Word *) idx2); 68 69 /* 70 * Note: the logical computation for this is 71 * (st_value1 - st_value2) 72 * However, that is only correct if the address type is smaller 73 * than a pointer. Writing it this way makes it immune to the 74 * class (32 or 64-bit) of the linker. 75 */ 76 return ((s1->st_value < s2->st_value) ? -1 : 77 (s1->st_value > s2->st_value)); 78 } 79 80 /* 81 * Scan the sorted symbols, and issue warnings if there are any duplicate 82 * values in the list. We only do this if -zverbose is set, or we are 83 * running with LD_DEBUG defined 84 * 85 * entry: 86 * ofl - Output file descriptor 87 * ldynsym - Pointer to start of .SUNW_ldynsym section that the 88 * sort section indexes reference. 89 * symsort - Pointer to start of .SUNW_dynsymsort or .SUNW_dyntlssort 90 * section. 91 * n - # of indices in symsort array 92 * secname - Name of the symsort section. 93 * 94 * exit: 95 * If the symsort section contains indexes to more than one 96 * symbol with the same address value, a warning is issued. 97 */ 98 static void 99 dynsort_dupwarn(Ofl_desc *ofl, Sym *ldynsym, const char *str, 100 Word *symsort, Word n, const char *secname) 101 { 102 int zverbose = (ofl->ofl_flags & FLG_OF_VERBOSE) != 0; 103 Word ndx, cmp_ndx; 104 Addr addr, cmp_addr; 105 106 /* Nothing to do if -zverbose or LD_DEBUG are not active */ 107 if (!(zverbose || DBG_ENABLED)) 108 return; 109 110 cmp_ndx = 0; 111 cmp_addr = ldynsym[symsort[cmp_ndx]].st_value; 112 for (ndx = 1; ndx < n; ndx++) { 113 addr = ldynsym[symsort[ndx]].st_value; 114 if (cmp_addr == addr) { 115 if (zverbose) 116 ld_eprintf(ofl, ERR_WARNING, 117 MSG_INTL(MSG_SYM_DUPSORTADDR), secname, 118 str + ldynsym[symsort[cmp_ndx]].st_name, 119 str + ldynsym[symsort[ndx]].st_name, 120 EC_ADDR(addr)); 121 DBG_CALL(Dbg_syms_dup_sort_addr(ofl->ofl_lml, secname, 122 str + ldynsym[symsort[cmp_ndx]].st_name, 123 str + ldynsym[symsort[ndx]].st_name, 124 EC_ADDR(addr))); 125 } else { /* Not a dup. Move reference up */ 126 cmp_ndx = ndx; 127 cmp_addr = addr; 128 } 129 } 130 } 131 132 /* 133 * Build and update any output symbol tables. Here we work on all the symbol 134 * tables at once to reduce the duplication of symbol and string manipulation. 135 * Symbols and their associated strings are copied from the read-only input 136 * file images to the output image and their values and index's updated in the 137 * output image. 138 */ 139 static Addr 140 update_osym(Ofl_desc *ofl) 141 { 142 /* 143 * There are several places in this function where we wish 144 * to insert a symbol index to the combined .SUNW_ldynsym/.dynsym 145 * symbol table into one of the two sort sections (.SUNW_dynsymsort 146 * or .SUNW_dyntlssort), if that symbol has the right attributes. 147 * This macro is used to generate the necessary code from a single 148 * specification. 149 * 150 * entry: 151 * _sdp, _sym, _type - As per DYNSORT_COUNT. See _libld.h 152 * _sym_ndx - Index that _sym will have in the combined 153 * .SUNW_ldynsym/.dynsym symbol table. 154 */ 155 #define ADD_TO_DYNSORT(_sdp, _sym, _type, _sym_ndx) \ 156 { \ 157 Word *_dynsort_arr, *_dynsort_ndx; \ 158 \ 159 if (dynsymsort_symtype[_type]) { \ 160 _dynsort_arr = dynsymsort; \ 161 _dynsort_ndx = &dynsymsort_ndx; \ 162 } else if (_type == STT_TLS) { \ 163 _dynsort_arr = dyntlssort; \ 164 _dynsort_ndx = &dyntlssort_ndx; \ 165 } else { \ 166 _dynsort_arr = NULL; \ 167 } \ 168 if ((_dynsort_arr != NULL) && DYNSORT_TEST_ATTR(_sdp, _sym)) \ 169 _dynsort_arr[(*_dynsort_ndx)++] = _sym_ndx; \ 170 } 171 172 Sym_desc *sdp; 173 Sym_avlnode *sav; 174 Sg_desc *sgp, *tsgp = NULL, *dsgp = NULL, *esgp = NULL; 175 Os_desc *osp, *iosp = NULL, *fosp = NULL; 176 Is_desc *isc; 177 Ifl_desc *ifl; 178 Word bssndx, etext_ndx, edata_ndx = 0, end_ndx, start_ndx; 179 Word end_abs = 0, etext_abs = 0, edata_abs; 180 Word tlsbssndx = 0, parexpnndx; 181 #if defined(_ELF64) 182 Word lbssndx = 0; 183 Addr lbssaddr = 0; 184 #endif 185 Addr bssaddr, etext = 0, edata = 0, end = 0, start = 0; 186 Addr tlsbssaddr = 0; 187 Addr parexpnbase, parexpnaddr; 188 int start_set = 0; 189 Sym _sym = {0}, *sym, *symtab = NULL; 190 Sym *dynsym = NULL, *ldynsym = NULL; 191 Word symtab_ndx = 0; /* index into .symtab */ 192 Word symtab_gbl_bndx; /* .symtab ndx 1st global */ 193 Word ldynsym_ndx = 0; /* index into .SUNW_ldynsym */ 194 Word dynsym_ndx = 0; /* index into .dynsym */ 195 Word scopesym_ndx = 0; /* index into scoped symbols */ 196 Word scopesym_bndx = 0; /* .symtab ndx 1st scoped sym */ 197 Word ldynscopesym_ndx = 0; /* index to ldynsym scoped */ 198 /* symbols */ 199 Word *dynsymsort = NULL; /* SUNW_dynsymsort index */ 200 /* vector */ 201 Word *dyntlssort = NULL; /* SUNW_dyntlssort index */ 202 /* vector */ 203 Word dynsymsort_ndx; /* index dynsymsort array */ 204 Word dyntlssort_ndx; /* index dyntlssort array */ 205 Word *symndx; /* symbol index (for */ 206 /* relocation use) */ 207 Word *symshndx = NULL; /* .symtab_shndx table */ 208 Word *dynshndx = NULL; /* .dynsym_shndx table */ 209 Word *ldynshndx = NULL; /* .SUNW_ldynsym_shndx table */ 210 Word ldynsym_cnt = NULL; /* number of items in */ 211 /* .SUNW_ldynsym */ 212 Str_tbl *shstrtab; 213 Str_tbl *strtab; 214 Str_tbl *dynstr; 215 Word *hashtab; /* hash table pointer */ 216 Word *hashbkt; /* hash table bucket pointer */ 217 Word *hashchain; /* hash table chain pointer */ 218 Wk_desc *wkp; 219 Alist *weak = NULL; 220 ofl_flag_t flags = ofl->ofl_flags; 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 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] = DYNSYM_ALL_CNT(ofl); 285 if (ofl->ofl_osdynshndx) 286 dynshndx = 287 (Word *)ofl->ofl_osdynshndx->os_outdata->d_buf; 288 if (ofl->ofl_osldynshndx) 289 ldynshndx = 290 (Word *)ofl->ofl_osldynshndx->os_outdata->d_buf; 291 } 292 293 /* 294 * symndx is the symbol index to be used for relocation processing. It 295 * points to the relevant symtab's (.dynsym or .symtab) symbol ndx. 296 */ 297 if (dynsym) 298 symndx = &dynsym_ndx; 299 else 300 symndx = &symtab_ndx; 301 302 /* 303 * If we have version definitions initialize the version symbol index 304 * table. There is one entry for each symbol which contains the symbols 305 * version index. 306 */ 307 if (!(flags & FLG_OF_NOVERSEC) && 308 (flags & (FLG_OF_VERNEED | FLG_OF_VERDEF))) { 309 versym = (Versym *)ofl->ofl_osversym->os_outdata->d_buf; 310 versym[0] = NULL; 311 } else 312 versym = NULL; 313 314 /* 315 * If syminfo section exists be prepared to fill it in. 316 */ 317 if (ofl->ofl_ossyminfo) { 318 syminfo = ofl->ofl_ossyminfo->os_outdata->d_buf; 319 syminfo[0].si_flags = SYMINFO_CURRENT; 320 } else 321 syminfo = NULL; 322 323 /* 324 * Setup our string tables. 325 */ 326 shstrtab = ofl->ofl_shdrsttab; 327 strtab = ofl->ofl_strtab; 328 dynstr = ofl->ofl_dynstrtab; 329 330 DBG_CALL(Dbg_syms_sec_title(ofl->ofl_lml)); 331 332 /* 333 * Put output file name to the first .symtab and .SUNW_ldynsym symbol. 334 */ 335 if (symtab) { 336 (void) st_setstring(strtab, ofl->ofl_name, &stoff); 337 sym = &symtab[symtab_ndx++]; 338 /* LINTED */ 339 sym->st_name = stoff; 340 sym->st_value = 0; 341 sym->st_size = 0; 342 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_FILE); 343 sym->st_other = 0; 344 sym->st_shndx = SHN_ABS; 345 346 if (versym && !dynsym) 347 versym[1] = 0; 348 } 349 if (ldynsym) { 350 (void) st_setstring(dynstr, ofl->ofl_name, &stoff); 351 sym = &ldynsym[ldynsym_ndx]; 352 /* LINTED */ 353 sym->st_name = stoff; 354 sym->st_value = 0; 355 sym->st_size = 0; 356 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_FILE); 357 sym->st_other = 0; 358 sym->st_shndx = SHN_ABS; 359 360 /* Scoped symbols get filled in global loop below */ 361 ldynscopesym_ndx = ldynsym_ndx + 1; 362 ldynsym_ndx += ofl->ofl_dynscopecnt; 363 } 364 365 /* 366 * If we are to display GOT summary information, then allocate 367 * the buffer to 'cache' the GOT symbols into now. 368 */ 369 if (DBG_ENABLED) { 370 if ((ofl->ofl_gottable = gottable = 371 libld_calloc(ofl->ofl_gotcnt, sizeof (Gottable))) == NULL) 372 return ((Addr)S_ERROR); 373 } 374 375 /* 376 * Traverse the program headers. Determine the last executable segment 377 * and the last data segment so that we can update etext and edata. If 378 * we have empty segments (reservations) record them for setting _end. 379 */ 380 for (APLIST_TRAVERSE(ofl->ofl_segs, idx1, sgp)) { 381 Phdr *phd = &(sgp->sg_phdr); 382 Os_desc *osp; 383 Aliste idx2; 384 385 if (phd->p_type == PT_LOAD) { 386 if (sgp->sg_osdescs != NULL) { 387 Word _flags = phd->p_flags & (PF_W | PF_R); 388 389 if (_flags == PF_R) 390 tsgp = sgp; 391 else if (_flags == (PF_W | PF_R)) 392 dsgp = sgp; 393 } else if (sgp->sg_flags & FLG_SG_EMPTY) 394 esgp = sgp; 395 } 396 397 /* 398 * Generate a section symbol for each output section. 399 */ 400 for (APLIST_TRAVERSE(sgp->sg_osdescs, idx2, osp)) { 401 Word sectndx; 402 403 sym = &_sym; 404 sym->st_value = osp->os_shdr->sh_addr; 405 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_SECTION); 406 /* LINTED */ 407 sectndx = elf_ndxscn(osp->os_scn); 408 409 if (symtab) { 410 if (sectndx >= SHN_LORESERVE) { 411 symshndx[symtab_ndx] = sectndx; 412 sym->st_shndx = SHN_XINDEX; 413 } else { 414 /* LINTED */ 415 sym->st_shndx = (Half)sectndx; 416 } 417 symtab[symtab_ndx++] = *sym; 418 } 419 420 if (dynsym && (osp->os_flags & FLG_OS_OUTREL)) 421 dynsym[dynsym_ndx++] = *sym; 422 423 if ((dynsym == NULL) || 424 (osp->os_flags & FLG_OS_OUTREL)) { 425 if (versym) 426 versym[*symndx - 1] = 0; 427 osp->os_identndx = *symndx - 1; 428 DBG_CALL(Dbg_syms_sec_entry(ofl->ofl_lml, 429 osp->os_identndx, sgp, osp)); 430 } 431 432 /* 433 * Generate the .shstrtab for this section. 434 */ 435 (void) st_setstring(shstrtab, osp->os_name, &stoff); 436 osp->os_shdr->sh_name = (Word)stoff; 437 438 /* 439 * Find the section index for our special symbols. 440 */ 441 if (sgp == tsgp) { 442 /* LINTED */ 443 etext_ndx = elf_ndxscn(osp->os_scn); 444 } else if (dsgp == sgp) { 445 if (osp->os_shdr->sh_type != SHT_NOBITS) { 446 /* LINTED */ 447 edata_ndx = elf_ndxscn(osp->os_scn); 448 } 449 } 450 451 if (start_set == 0) { 452 start = sgp->sg_phdr.p_vaddr; 453 /* LINTED */ 454 start_ndx = elf_ndxscn(osp->os_scn); 455 start_set++; 456 } 457 458 /* 459 * While we're here, determine whether a .init or .fini 460 * section exist. 461 */ 462 if ((iosp == NULL) && (strcmp(osp->os_name, 463 MSG_ORIG(MSG_SCN_INIT)) == 0)) 464 iosp = osp; 465 if ((fosp == NULL) && (strcmp(osp->os_name, 466 MSG_ORIG(MSG_SCN_FINI)) == 0)) 467 fosp = osp; 468 } 469 } 470 471 /* 472 * Add local register symbols to the .dynsym. These are required as 473 * DT_REGISTER .dynamic entries must have a symbol to reference. 474 */ 475 if (ofl->ofl_regsyms && dynsym) { 476 int ndx; 477 478 for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 479 Sym_desc *rsdp; 480 481 if ((rsdp = ofl->ofl_regsyms[ndx]) == NULL) 482 continue; 483 484 if (!SYM_IS_HIDDEN(rsdp) && 485 (ELF_ST_BIND(rsdp->sd_sym->st_info) != STB_LOCAL)) 486 continue; 487 488 dynsym[dynsym_ndx] = *(rsdp->sd_sym); 489 rsdp->sd_symndx = *symndx; 490 491 if (dynsym[dynsym_ndx].st_name) { 492 (void) st_setstring(dynstr, rsdp->sd_name, 493 &stoff); 494 dynsym[dynsym_ndx].st_name = stoff; 495 } 496 dynsym_ndx++; 497 } 498 } 499 500 /* 501 * Having traversed all the output segments, warn the user if the 502 * traditional text or data segments don't exist. Otherwise from these 503 * segments establish the values for `etext', `edata', `end', `END', 504 * and `START'. 505 */ 506 if (!(flags & FLG_OF_RELOBJ)) { 507 Sg_desc *sgp; 508 509 if (tsgp) 510 etext = tsgp->sg_phdr.p_vaddr + tsgp->sg_phdr.p_filesz; 511 else { 512 etext = (Addr)0; 513 etext_ndx = SHN_ABS; 514 etext_abs = 1; 515 if (flags & FLG_OF_VERBOSE) 516 ld_eprintf(ofl, ERR_WARNING, 517 MSG_INTL(MSG_UPD_NOREADSEG)); 518 } 519 if (dsgp) { 520 edata = dsgp->sg_phdr.p_vaddr + dsgp->sg_phdr.p_filesz; 521 } else { 522 edata = (Addr)0; 523 edata_ndx = SHN_ABS; 524 edata_abs = 1; 525 if (flags & FLG_OF_VERBOSE) 526 ld_eprintf(ofl, ERR_WARNING, 527 MSG_INTL(MSG_UPD_NORDWRSEG)); 528 } 529 530 if (dsgp == NULL) { 531 if (tsgp) 532 sgp = tsgp; 533 else 534 sgp = 0; 535 } else if (tsgp == NULL) 536 sgp = dsgp; 537 else if (dsgp->sg_phdr.p_vaddr > tsgp->sg_phdr.p_vaddr) 538 sgp = dsgp; 539 else if (dsgp->sg_phdr.p_vaddr < tsgp->sg_phdr.p_vaddr) 540 sgp = tsgp; 541 else { 542 /* 543 * One of the segments must be of zero size. 544 */ 545 if (tsgp->sg_phdr.p_memsz) 546 sgp = tsgp; 547 else 548 sgp = dsgp; 549 } 550 551 if (esgp && (esgp->sg_phdr.p_vaddr > sgp->sg_phdr.p_vaddr)) 552 sgp = esgp; 553 554 if (sgp) { 555 end = sgp->sg_phdr.p_vaddr + sgp->sg_phdr.p_memsz; 556 557 /* 558 * If the last loadable segment is a read-only segment, 559 * then the application which uses the symbol _end to 560 * find the beginning of writable heap area may cause 561 * segmentation violation. We adjust the value of the 562 * _end to skip to the next page boundary. 563 * 564 * 6401812 System interface which returs beginning 565 * heap would be nice. 566 * When the above RFE is implemented, the changes below 567 * could be changed in a better way. 568 */ 569 if ((sgp->sg_phdr.p_flags & PF_W) == 0) 570 end = (Addr)S_ROUND(end, sysconf(_SC_PAGESIZE)); 571 572 /* 573 * If we're dealing with a memory reservation there are 574 * no sections to establish an index for _end, so assign 575 * it as an absolute. 576 */ 577 if (sgp->sg_osdescs != NULL) { 578 /* 579 * Determine the last section for this segment. 580 */ 581 Os_desc *osp = sgp->sg_osdescs->apl_data 582 [sgp->sg_osdescs->apl_nitems - 1]; 583 584 /* LINTED */ 585 end_ndx = elf_ndxscn(osp->os_scn); 586 } else { 587 end_ndx = SHN_ABS; 588 end_abs = 1; 589 } 590 } else { 591 end = (Addr) 0; 592 end_ndx = SHN_ABS; 593 end_abs = 1; 594 ld_eprintf(ofl, ERR_WARNING, MSG_INTL(MSG_UPD_NOSEG)); 595 } 596 } 597 598 /* 599 * Initialize the scoped symbol table entry point. This is for all 600 * the global symbols that have been scoped to locals and will be 601 * filled in during global symbol processing so that we don't have 602 * to traverse the globals symbol hash array more than once. 603 */ 604 if (symtab) { 605 scopesym_bndx = symtab_ndx; 606 scopesym_ndx = scopesym_bndx; 607 symtab_ndx += ofl->ofl_scopecnt; 608 } 609 610 /* 611 * If expanding partially expanded symbols under '-z nopartial', 612 * prepare to do that. 613 */ 614 if (ofl->ofl_isparexpn) { 615 osp = ofl->ofl_isparexpn->is_osdesc; 616 parexpnbase = parexpnaddr = (Addr)(osp->os_shdr->sh_addr + 617 ofl->ofl_isparexpn->is_indata->d_off); 618 /* LINTED */ 619 parexpnndx = elf_ndxscn(osp->os_scn); 620 ofl->ofl_parexpnndx = osp->os_identndx; 621 } 622 623 /* 624 * If we are generating a .symtab collect all the local symbols, 625 * assigning a new virtual address or displacement (value). 626 */ 627 for (APLIST_TRAVERSE(ofl->ofl_objs, idx1, ifl)) { 628 Xword lndx, local = ifl->ifl_locscnt; 629 Cap_desc *cdp = ifl->ifl_caps; 630 631 for (lndx = 1; lndx < local; lndx++) { 632 Gotndx *gnp; 633 uchar_t type; 634 Word *_symshndx; 635 int enter_in_symtab, enter_in_ldynsym; 636 int update_done; 637 638 sdp = ifl->ifl_oldndx[lndx]; 639 sym = sdp->sd_sym; 640 641 /* 642 * Assign a got offset if necessary. 643 */ 644 if ((ld_targ.t_mr.mr_assign_got != NULL) && 645 (*ld_targ.t_mr.mr_assign_got)(ofl, sdp) == S_ERROR) 646 return ((Addr)S_ERROR); 647 648 if (DBG_ENABLED) { 649 Aliste idx2; 650 651 for (ALIST_TRAVERSE(sdp->sd_GOTndxs, 652 idx2, gnp)) { 653 gottable->gt_sym = sdp; 654 gottable->gt_gndx.gn_gotndx = 655 gnp->gn_gotndx; 656 gottable->gt_gndx.gn_addend = 657 gnp->gn_addend; 658 gottable++; 659 } 660 } 661 662 if ((type = ELF_ST_TYPE(sym->st_info)) == STT_SECTION) 663 continue; 664 665 /* 666 * Ignore any symbols that have been marked as invalid 667 * during input processing. Providing these aren't used 668 * for relocation they'll just be dropped from the 669 * output image. 670 */ 671 if (sdp->sd_flags & FLG_SY_INVALID) 672 continue; 673 674 /* 675 * If the section that this symbol was associated 676 * with has been discarded - then we discard 677 * the local symbol along with it. 678 */ 679 if (sdp->sd_flags & FLG_SY_ISDISC) 680 continue; 681 682 /* 683 * If this symbol is from a different file 684 * than the input descriptor we are processing, 685 * treat it as if it has FLG_SY_ISDISC set. 686 * This happens when sloppy_comdat_reloc() 687 * replaces a symbol to a discarded comdat section 688 * with an equivalent symbol from a different 689 * file. We only want to enter such a symbol 690 * once --- as part of the file that actually 691 * supplies it. 692 */ 693 if (ifl != sdp->sd_file) 694 continue; 695 696 /* 697 * Generate an output symbol to represent this input 698 * symbol. Even if the symbol table is to be stripped 699 * we still need to update any local symbols that are 700 * used during relocation. 701 */ 702 enter_in_symtab = symtab && 703 (!(ofl->ofl_flags & FLG_OF_REDLSYM) || 704 sdp->sd_move); 705 enter_in_ldynsym = ldynsym && sdp->sd_name && 706 ldynsym_symtype[type] && 707 !(ofl->ofl_flags & FLG_OF_REDLSYM); 708 _symshndx = NULL; 709 710 if (enter_in_symtab) { 711 if (!dynsym) 712 sdp->sd_symndx = *symndx; 713 symtab[symtab_ndx] = *sym; 714 715 /* 716 * Provided this isn't an unnamed register 717 * symbol, update its name. 718 */ 719 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 720 symtab[symtab_ndx].st_name) { 721 (void) st_setstring(strtab, 722 sdp->sd_name, &stoff); 723 symtab[symtab_ndx].st_name = stoff; 724 } 725 sdp->sd_flags &= ~FLG_SY_CLEAN; 726 if (symshndx) 727 _symshndx = &symshndx[symtab_ndx]; 728 sdp->sd_sym = sym = &symtab[symtab_ndx++]; 729 730 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 731 (sym->st_shndx == SHN_ABS) && 732 !enter_in_ldynsym) 733 continue; 734 } else if (enter_in_ldynsym) { 735 /* 736 * Not using symtab, but we do have ldynsym 737 * available. 738 */ 739 ldynsym[ldynsym_ndx] = *sym; 740 (void) st_setstring(dynstr, sdp->sd_name, 741 &stoff); 742 ldynsym[ldynsym_ndx].st_name = stoff; 743 744 sdp->sd_flags &= ~FLG_SY_CLEAN; 745 if (ldynshndx) 746 _symshndx = &ldynshndx[ldynsym_ndx]; 747 sdp->sd_sym = sym = &ldynsym[ldynsym_ndx]; 748 /* Add it to sort section if it qualifies */ 749 ADD_TO_DYNSORT(sdp, sym, type, ldynsym_ndx); 750 ldynsym_ndx++; 751 } else { /* Not using symtab or ldynsym */ 752 /* 753 * If this symbol requires modifying to provide 754 * for a relocation or move table update, make 755 * a copy of it. 756 */ 757 if (!(sdp->sd_flags & FLG_SY_UPREQD) && 758 !(sdp->sd_move)) 759 continue; 760 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 761 (sym->st_shndx == SHN_ABS)) 762 continue; 763 764 if (ld_sym_copy(sdp) == S_ERROR) 765 return ((Addr)S_ERROR); 766 sym = sdp->sd_sym; 767 } 768 769 /* 770 * Update the symbols contents if necessary. 771 */ 772 update_done = 0; 773 if (type == STT_FILE) { 774 sdp->sd_shndx = sym->st_shndx = SHN_ABS; 775 sdp->sd_flags |= FLG_SY_SPECSEC; 776 update_done = 1; 777 } 778 779 /* 780 * If we are expanding the locally bound partially 781 * initialized symbols, then update the address here. 782 */ 783 if (ofl->ofl_isparexpn && 784 (sdp->sd_flags & FLG_SY_PAREXPN) && !update_done) { 785 sym->st_shndx = parexpnndx; 786 sdp->sd_isc = ofl->ofl_isparexpn; 787 sym->st_value = parexpnaddr; 788 parexpnaddr += sym->st_size; 789 if ((flags & FLG_OF_RELOBJ) == 0) 790 sym->st_value -= parexpnbase; 791 } 792 793 /* 794 * If this isn't an UNDEF symbol (ie. an input section 795 * is associated), update the symbols value and index. 796 */ 797 if (((isc = sdp->sd_isc) != NULL) && !update_done) { 798 Word sectndx; 799 800 osp = isc->is_osdesc; 801 /* LINTED */ 802 sym->st_value += 803 (Off)_elf_getxoff(isc->is_indata); 804 if ((flags & FLG_OF_RELOBJ) == 0) { 805 sym->st_value += osp->os_shdr->sh_addr; 806 /* 807 * TLS symbols are relative to 808 * the TLS segment. 809 */ 810 if ((type == STT_TLS) && 811 (ofl->ofl_tlsphdr)) { 812 sym->st_value -= 813 ofl->ofl_tlsphdr->p_vaddr; 814 } 815 } 816 /* LINTED */ 817 if ((sdp->sd_shndx = sectndx = 818 elf_ndxscn(osp->os_scn)) >= SHN_LORESERVE) { 819 if (_symshndx) { 820 *_symshndx = sectndx; 821 } 822 sym->st_shndx = SHN_XINDEX; 823 } else { 824 /* LINTED */ 825 sym->st_shndx = sectndx; 826 } 827 } 828 829 /* 830 * If entering the symbol in both the symtab and the 831 * ldynsym, then the one in symtab needs to be 832 * copied to ldynsym. If it is only in the ldynsym, 833 * then the code above already set it up and we have 834 * nothing more to do here. 835 */ 836 if (enter_in_symtab && enter_in_ldynsym) { 837 ldynsym[ldynsym_ndx] = *sym; 838 (void) st_setstring(dynstr, sdp->sd_name, 839 &stoff); 840 ldynsym[ldynsym_ndx].st_name = stoff; 841 842 if (_symshndx && ldynshndx) 843 ldynshndx[ldynsym_ndx] = *_symshndx; 844 845 /* Add it to sort section if it qualifies */ 846 ADD_TO_DYNSORT(sdp, sym, type, ldynsym_ndx); 847 848 ldynsym_ndx++; 849 } 850 } 851 852 /* 853 * If this input file has undergone object to symbol 854 * capabilities conversion, supply any new capabilities symbols. 855 * These symbols are copies of the original global symbols, and 856 * follow the existing local symbols that are supplied from this 857 * input file (which are identified with a preceding STT_FILE). 858 */ 859 if (symtab && cdp && cdp->ca_syms) { 860 Aliste idx2; 861 Cap_sym *csp; 862 863 for (APLIST_TRAVERSE(cdp->ca_syms, idx2, csp)) { 864 Is_desc *isp; 865 866 sdp = csp->cs_sdp; 867 sym = sdp->sd_sym; 868 869 if ((isp = sdp->sd_isc) != NULL) { 870 Os_desc *osp = isp->is_osdesc; 871 872 /* 873 * Update the symbols value. 874 */ 875 /* LINTED */ 876 sym->st_value += 877 (Off)_elf_getxoff(isp->is_indata); 878 if ((flags & FLG_OF_RELOBJ) == 0) 879 sym->st_value += 880 osp->os_shdr->sh_addr; 881 882 /* 883 * Update the symbols section index. 884 */ 885 sdp->sd_shndx = sym->st_shndx = 886 elf_ndxscn(osp->os_scn); 887 } 888 889 symtab[symtab_ndx] = *sym; 890 (void) st_setstring(strtab, sdp->sd_name, 891 &stoff); 892 symtab[symtab_ndx].st_name = stoff; 893 sdp->sd_symndx = symtab_ndx++; 894 } 895 } 896 } 897 898 symtab_gbl_bndx = symtab_ndx; /* .symtab index of 1st global entry */ 899 900 /* 901 * Two special symbols are `_init' and `_fini'. If these are supplied 902 * by crti.o then they are used to represent the total concatenation of 903 * the `.init' and `.fini' sections. 904 * 905 * Determine whether any .init or .fini sections exist. If these 906 * sections exist and a dynamic object is being built, but no `_init' 907 * or `_fini' symbols are found, then the user is probably building 908 * this object directly from ld(1) rather than using a compiler driver 909 * that provides the symbols via crt's. 910 * 911 * If the .init or .fini section exist, and their associated symbols, 912 * determine the size of the sections and updated the symbols value 913 * accordingly. 914 */ 915 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_INIT_U), SYM_NOHASH, 0, 916 ofl)) != NULL) && (sdp->sd_ref == REF_REL_NEED) && sdp->sd_isc && 917 (sdp->sd_isc->is_osdesc == iosp)) { 918 if (ld_sym_copy(sdp) == S_ERROR) 919 return ((Addr)S_ERROR); 920 sdp->sd_sym->st_size = sdp->sd_isc->is_osdesc->os_shdr->sh_size; 921 922 } else if (iosp && !(flags & FLG_OF_RELOBJ)) { 923 ld_eprintf(ofl, ERR_WARNING, MSG_INTL(MSG_SYM_NOCRT), 924 MSG_ORIG(MSG_SYM_INIT_U), MSG_ORIG(MSG_SCN_INIT)); 925 } 926 927 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_FINI_U), SYM_NOHASH, 0, 928 ofl)) != NULL) && (sdp->sd_ref == REF_REL_NEED) && sdp->sd_isc && 929 (sdp->sd_isc->is_osdesc == fosp)) { 930 if (ld_sym_copy(sdp) == S_ERROR) 931 return ((Addr)S_ERROR); 932 sdp->sd_sym->st_size = sdp->sd_isc->is_osdesc->os_shdr->sh_size; 933 934 } else if (fosp && !(flags & FLG_OF_RELOBJ)) { 935 ld_eprintf(ofl, ERR_WARNING, MSG_INTL(MSG_SYM_NOCRT), 936 MSG_ORIG(MSG_SYM_FINI_U), MSG_ORIG(MSG_SCN_FINI)); 937 } 938 939 /* 940 * Assign .bss information for use with updating COMMON symbols. 941 */ 942 if (ofl->ofl_isbss) { 943 isc = ofl->ofl_isbss; 944 osp = isc->is_osdesc; 945 946 bssaddr = osp->os_shdr->sh_addr + 947 (Off)_elf_getxoff(isc->is_indata); 948 /* LINTED */ 949 bssndx = elf_ndxscn(osp->os_scn); 950 } 951 952 #if defined(_ELF64) 953 /* 954 * For amd64 target, assign .lbss information for use 955 * with updating LCOMMON symbols. 956 */ 957 if ((ld_targ.t_m.m_mach == EM_AMD64) && ofl->ofl_islbss) { 958 osp = ofl->ofl_islbss->is_osdesc; 959 960 lbssaddr = osp->os_shdr->sh_addr + 961 (Off)_elf_getxoff(ofl->ofl_islbss->is_indata); 962 /* LINTED */ 963 lbssndx = elf_ndxscn(osp->os_scn); 964 } 965 #endif 966 /* 967 * Assign .tlsbss information for use with updating COMMON symbols. 968 */ 969 if (ofl->ofl_istlsbss) { 970 osp = ofl->ofl_istlsbss->is_osdesc; 971 tlsbssaddr = osp->os_shdr->sh_addr + 972 (Off)_elf_getxoff(ofl->ofl_istlsbss->is_indata); 973 /* LINTED */ 974 tlsbssndx = elf_ndxscn(osp->os_scn); 975 } 976 977 if ((sorted_syms = libld_calloc(ofl->ofl_globcnt + 978 ofl->ofl_elimcnt + ofl->ofl_scopecnt, 979 sizeof (*sorted_syms))) == NULL) 980 return ((Addr)S_ERROR); 981 982 scndx = 0; 983 ssndx = ofl->ofl_scopecnt + ofl->ofl_elimcnt; 984 985 DBG_CALL(Dbg_syms_up_title(ofl->ofl_lml)); 986 987 /* 988 * Traverse the internal symbol table updating global symbol information 989 * and allocating common. 990 */ 991 for (sav = avl_first(&ofl->ofl_symavl); sav; 992 sav = AVL_NEXT(&ofl->ofl_symavl, sav)) { 993 Sym *symptr; 994 int local; 995 int restore; 996 997 sdp = sav->sav_sdp; 998 999 /* 1000 * Ignore any symbols that have been marked as invalid during 1001 * input processing. Providing these aren't used for 1002 * relocation, they will be dropped from the output image. 1003 */ 1004 if (sdp->sd_flags & FLG_SY_INVALID) { 1005 DBG_CALL(Dbg_syms_old(ofl, sdp)); 1006 DBG_CALL(Dbg_syms_ignore(ofl, sdp)); 1007 continue; 1008 } 1009 1010 /* 1011 * Only needed symbols are copied to the output symbol table. 1012 */ 1013 if (sdp->sd_ref == REF_DYN_SEEN) 1014 continue; 1015 1016 if (ld_sym_reducable(ofl, sdp)) 1017 local = 1; 1018 else 1019 local = 0; 1020 1021 if (local || (ofl->ofl_hashbkts == 0)) { 1022 sorted_syms[scndx++].sl_sdp = sdp; 1023 } else { 1024 sorted_syms[ssndx].sl_hval = sdp->sd_aux->sa_hash % 1025 ofl->ofl_hashbkts; 1026 sorted_syms[ssndx].sl_sdp = sdp; 1027 ssndx++; 1028 } 1029 1030 /* 1031 * Note - expand the COMMON symbols here because an address 1032 * must be assigned to them in the same order that space was 1033 * calculated in sym_validate(). If this ordering isn't 1034 * followed differing alignment requirements can throw us all 1035 * out of whack. 1036 * 1037 * The expanded .bss global symbol is handled here as well. 1038 * 1039 * The actual adding entries into the symbol table still occurs 1040 * below in hashbucket order. 1041 */ 1042 symptr = sdp->sd_sym; 1043 restore = 0; 1044 if ((sdp->sd_flags & FLG_SY_PAREXPN) || 1045 ((sdp->sd_flags & FLG_SY_SPECSEC) && 1046 (sdp->sd_shndx = symptr->st_shndx) == SHN_COMMON)) { 1047 1048 /* 1049 * An expanded symbol goes to a special .data section 1050 * prepared for that purpose (ofl->ofl_isparexpn). 1051 * Assign COMMON allocations to .bss. 1052 * Otherwise leave it as is. 1053 */ 1054 if (sdp->sd_flags & FLG_SY_PAREXPN) { 1055 restore = 1; 1056 sdp->sd_shndx = parexpnndx; 1057 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1058 symptr->st_value = (Xword) S_ROUND( 1059 parexpnaddr, symptr->st_value); 1060 parexpnaddr = symptr->st_value + 1061 symptr->st_size; 1062 sdp->sd_isc = ofl->ofl_isparexpn; 1063 sdp->sd_flags |= FLG_SY_COMMEXP; 1064 1065 } else if (ELF_ST_TYPE(symptr->st_info) != STT_TLS && 1066 (local || !(flags & FLG_OF_RELOBJ))) { 1067 restore = 1; 1068 sdp->sd_shndx = bssndx; 1069 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1070 symptr->st_value = (Xword)S_ROUND(bssaddr, 1071 symptr->st_value); 1072 bssaddr = symptr->st_value + symptr->st_size; 1073 sdp->sd_isc = ofl->ofl_isbss; 1074 sdp->sd_flags |= FLG_SY_COMMEXP; 1075 1076 } else if (ELF_ST_TYPE(symptr->st_info) == STT_TLS && 1077 (local || !(flags & FLG_OF_RELOBJ))) { 1078 restore = 1; 1079 sdp->sd_shndx = tlsbssndx; 1080 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1081 symptr->st_value = (Xword)S_ROUND(tlsbssaddr, 1082 symptr->st_value); 1083 tlsbssaddr = symptr->st_value + symptr->st_size; 1084 sdp->sd_isc = ofl->ofl_istlsbss; 1085 sdp->sd_flags |= FLG_SY_COMMEXP; 1086 /* 1087 * TLS symbols are relative to the TLS segment. 1088 */ 1089 symptr->st_value -= ofl->ofl_tlsphdr->p_vaddr; 1090 } 1091 #if defined(_ELF64) 1092 } else if ((ld_targ.t_m.m_mach == EM_AMD64) && 1093 (sdp->sd_flags & FLG_SY_SPECSEC) && 1094 ((sdp->sd_shndx = symptr->st_shndx) == 1095 SHN_X86_64_LCOMMON) && 1096 ((local || !(flags & FLG_OF_RELOBJ)))) { 1097 restore = 1; 1098 sdp->sd_shndx = lbssndx; 1099 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1100 symptr->st_value = (Xword)S_ROUND(lbssaddr, 1101 symptr->st_value); 1102 lbssaddr = symptr->st_value + symptr->st_size; 1103 sdp->sd_isc = ofl->ofl_islbss; 1104 sdp->sd_flags |= FLG_SY_COMMEXP; 1105 #endif 1106 } 1107 1108 if (restore != 0) { 1109 uchar_t type, bind; 1110 1111 /* 1112 * Make sure this COMMON symbol is returned to the same 1113 * binding as was defined in the original relocatable 1114 * object reference. 1115 */ 1116 type = ELF_ST_TYPE(symptr->st_info); 1117 if (sdp->sd_flags & FLG_SY_GLOBREF) 1118 bind = STB_GLOBAL; 1119 else 1120 bind = STB_WEAK; 1121 1122 symptr->st_info = ELF_ST_INFO(bind, type); 1123 } 1124 } 1125 1126 /* 1127 * If this is a dynamic object then add any local capabilities symbols. 1128 */ 1129 if (dynsym && ofl->ofl_capfamilies) { 1130 Cap_avlnode *cav; 1131 1132 for (cav = avl_first(ofl->ofl_capfamilies); cav; 1133 cav = AVL_NEXT(ofl->ofl_capfamilies, cav)) { 1134 Cap_sym *csp; 1135 Aliste idx; 1136 1137 for (APLIST_TRAVERSE(cav->cn_members, idx, csp)) { 1138 sdp = csp->cs_sdp; 1139 1140 DBG_CALL(Dbg_syms_created(ofl->ofl_lml, 1141 sdp->sd_name)); 1142 DBG_CALL(Dbg_syms_entered(ofl, sdp->sd_sym, 1143 sdp)); 1144 1145 dynsym[dynsym_ndx] = *sdp->sd_sym; 1146 1147 (void) st_setstring(dynstr, sdp->sd_name, 1148 &stoff); 1149 dynsym[dynsym_ndx].st_name = stoff; 1150 1151 sdp->sd_sym = &dynsym[dynsym_ndx]; 1152 sdp->sd_symndx = dynsym_ndx; 1153 1154 /* 1155 * Indicate that this is a capabilities symbol. 1156 * Note, that this identification only provides 1157 * information regarding the symbol that is 1158 * visible from elfdump(1) -y. The association 1159 * of a symbol to its capabilities is derived 1160 * from a .SUNW_capinfo entry. 1161 */ 1162 if (syminfo) { 1163 syminfo[dynsym_ndx].si_flags |= 1164 SYMINFO_FLG_CAP; 1165 } 1166 1167 dynsym_ndx++; 1168 } 1169 } 1170 } 1171 1172 if (ofl->ofl_hashbkts) { 1173 qsort(sorted_syms + ofl->ofl_scopecnt + ofl->ofl_elimcnt, 1174 ofl->ofl_globcnt, sizeof (Sym_s_list), 1175 (int (*)(const void *, const void *))sym_hash_compare); 1176 } 1177 1178 for (ssndx = 0; ssndx < (ofl->ofl_elimcnt + ofl->ofl_scopecnt + 1179 ofl->ofl_globcnt); ssndx++) { 1180 const char *name; 1181 Sym *sym; 1182 Sym_aux *sap; 1183 Half spec; 1184 int local = 0, dynlocal = 0, enter_in_symtab; 1185 Gotndx *gnp; 1186 Word sectndx; 1187 1188 sdp = sorted_syms[ssndx].sl_sdp; 1189 sectndx = 0; 1190 1191 if (symtab) 1192 enter_in_symtab = 1; 1193 else 1194 enter_in_symtab = 0; 1195 1196 /* 1197 * Assign a got offset if necessary. 1198 */ 1199 if ((ld_targ.t_mr.mr_assign_got != NULL) && 1200 (*ld_targ.t_mr.mr_assign_got)(ofl, sdp) == S_ERROR) 1201 return ((Addr)S_ERROR); 1202 1203 if (DBG_ENABLED) { 1204 Aliste idx2; 1205 1206 for (ALIST_TRAVERSE(sdp->sd_GOTndxs, idx2, gnp)) { 1207 gottable->gt_sym = sdp; 1208 gottable->gt_gndx.gn_gotndx = gnp->gn_gotndx; 1209 gottable->gt_gndx.gn_addend = gnp->gn_addend; 1210 gottable++; 1211 } 1212 1213 if (sdp->sd_aux && sdp->sd_aux->sa_PLTGOTndx) { 1214 gottable->gt_sym = sdp; 1215 gottable->gt_gndx.gn_gotndx = 1216 sdp->sd_aux->sa_PLTGOTndx; 1217 gottable++; 1218 } 1219 } 1220 1221 /* 1222 * If this symbol has been marked as being reduced to local 1223 * scope then it will have to be placed in the scoped portion 1224 * of the .symtab. Retain the appropriate index for use in 1225 * version symbol indexing and relocation. 1226 */ 1227 if (ld_sym_reducable(ofl, sdp)) { 1228 local = 1; 1229 if (!(sdp->sd_flags & FLG_SY_ELIM) && !dynsym) 1230 sdp->sd_symndx = scopesym_ndx; 1231 else 1232 sdp->sd_symndx = 0; 1233 1234 if (sdp->sd_flags & FLG_SY_ELIM) { 1235 enter_in_symtab = 0; 1236 } else if (ldynsym && sdp->sd_sym->st_name && 1237 ldynsym_symtype[ 1238 ELF_ST_TYPE(sdp->sd_sym->st_info)]) { 1239 dynlocal = 1; 1240 } 1241 } else { 1242 sdp->sd_symndx = *symndx; 1243 } 1244 1245 /* 1246 * Copy basic symbol and string information. 1247 */ 1248 name = sdp->sd_name; 1249 sap = sdp->sd_aux; 1250 1251 /* 1252 * If we require to record version symbol indexes, update the 1253 * associated version symbol information for all defined 1254 * symbols. If a version definition is required any zero value 1255 * symbol indexes would have been flagged as undefined symbol 1256 * errors, however if we're just scoping these need to fall into 1257 * the base of global symbols. 1258 */ 1259 if (sdp->sd_symndx && versym) { 1260 Half vndx = 0; 1261 1262 if (sdp->sd_flags & FLG_SY_MVTOCOMM) { 1263 vndx = VER_NDX_GLOBAL; 1264 } else if (sdp->sd_ref == REF_REL_NEED) { 1265 vndx = sap->sa_overndx; 1266 1267 if ((vndx == 0) && 1268 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 1269 if (SYM_IS_HIDDEN(sdp)) 1270 vndx = VER_NDX_LOCAL; 1271 else 1272 vndx = VER_NDX_GLOBAL; 1273 } 1274 } else if ((sdp->sd_ref == REF_DYN_NEED) && 1275 (sap->sa_dverndx > 0) && 1276 (sap->sa_dverndx <= sdp->sd_file->ifl_vercnt) && 1277 (sdp->sd_file->ifl_verndx != NULL)) { 1278 /* Use index of verneed record */ 1279 vndx = sdp->sd_file->ifl_verndx 1280 [sap->sa_dverndx].vi_overndx; 1281 } 1282 versym[sdp->sd_symndx] = vndx; 1283 } 1284 1285 /* 1286 * If we are creating the .syminfo section then set per symbol 1287 * flags here. 1288 */ 1289 if (sdp->sd_symndx && syminfo && 1290 !(sdp->sd_flags & FLG_SY_NOTAVAIL)) { 1291 int ndx = sdp->sd_symndx; 1292 APlist **alpp = &(ofl->ofl_symdtent); 1293 1294 if (sdp->sd_flags & FLG_SY_MVTOCOMM) 1295 /* 1296 * Identify a copy relocation symbol. 1297 */ 1298 syminfo[ndx].si_flags |= SYMINFO_FLG_COPY; 1299 1300 if (sdp->sd_ref == REF_DYN_NEED) { 1301 /* 1302 * A reference is bound to a needed dependency. 1303 * Save the syminfo entry, so that when the 1304 * .dynamic section has been updated, a 1305 * DT_NEEDED entry can be associated 1306 * (see update_osyminfo()). 1307 */ 1308 if (aplist_append(alpp, sdp, 1309 AL_CNT_OFL_SYMINFOSYMS) == NULL) 1310 return (0); 1311 1312 /* 1313 * Flag that the symbol has a direct association 1314 * with the external reference (this is an old 1315 * tagging, that has no real effect by itself). 1316 */ 1317 syminfo[ndx].si_flags |= SYMINFO_FLG_DIRECT; 1318 1319 /* 1320 * Flag any lazy or deferred reference. 1321 */ 1322 if (sdp->sd_flags & FLG_SY_LAZYLD) 1323 syminfo[ndx].si_flags |= 1324 SYMINFO_FLG_LAZYLOAD; 1325 if (sdp->sd_flags & FLG_SY_DEFERRED) 1326 syminfo[ndx].si_flags |= 1327 SYMINFO_FLG_DEFERRED; 1328 1329 /* 1330 * Enable direct symbol bindings if: 1331 * 1332 * - Symbol was identified with the DIRECT 1333 * keyword in a mapfile. 1334 * 1335 * - Symbol reference has been bound to a 1336 * dependency which was specified as 1337 * requiring direct bindings with -zdirect. 1338 * 1339 * - All symbol references are required to 1340 * use direct bindings via -Bdirect. 1341 */ 1342 if (sdp->sd_flags & FLG_SY_DIR) 1343 syminfo[ndx].si_flags |= 1344 SYMINFO_FLG_DIRECTBIND; 1345 1346 } else if ((sdp->sd_flags & FLG_SY_EXTERN) && 1347 (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 1348 /* 1349 * If this symbol has been explicitly defined 1350 * as external, and remains unresolved, mark 1351 * it as external. 1352 */ 1353 syminfo[ndx].si_boundto = SYMINFO_BT_EXTERN; 1354 1355 } else if ((sdp->sd_flags & FLG_SY_PARENT) && 1356 (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 1357 /* 1358 * If this symbol has been explicitly defined 1359 * to be a reference to a parent object, 1360 * indicate whether a direct binding should be 1361 * established. 1362 */ 1363 syminfo[ndx].si_flags |= SYMINFO_FLG_DIRECT; 1364 syminfo[ndx].si_boundto = SYMINFO_BT_PARENT; 1365 if (sdp->sd_flags & FLG_SY_DIR) 1366 syminfo[ndx].si_flags |= 1367 SYMINFO_FLG_DIRECTBIND; 1368 1369 } else if (sdp->sd_flags & FLG_SY_STDFLTR) { 1370 /* 1371 * A filter definition. Although this symbol 1372 * can only be a stub, it might be necessary to 1373 * prevent external direct bindings. 1374 */ 1375 syminfo[ndx].si_flags |= SYMINFO_FLG_FILTER; 1376 if (sdp->sd_flags & FLG_SY_NDIR) 1377 syminfo[ndx].si_flags |= 1378 SYMINFO_FLG_NOEXTDIRECT; 1379 1380 } else if (sdp->sd_flags & FLG_SY_AUXFLTR) { 1381 /* 1382 * An auxiliary filter definition. By nature, 1383 * this definition is direct, in that should the 1384 * filtee lookup fail, we'll fall back to this 1385 * object. It may still be necessary to 1386 * prevent external direct bindings. 1387 */ 1388 syminfo[ndx].si_flags |= SYMINFO_FLG_AUXILIARY; 1389 if (sdp->sd_flags & FLG_SY_NDIR) 1390 syminfo[ndx].si_flags |= 1391 SYMINFO_FLG_NOEXTDIRECT; 1392 1393 } else if ((sdp->sd_ref == REF_REL_NEED) && 1394 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 1395 /* 1396 * This definition exists within the object 1397 * being created. Provide a default boundto 1398 * definition, which may be overridden later. 1399 */ 1400 syminfo[ndx].si_boundto = SYMINFO_BT_NONE; 1401 1402 /* 1403 * Indicate whether it is necessary to prevent 1404 * external direct bindings. 1405 */ 1406 if (sdp->sd_flags & FLG_SY_NDIR) { 1407 syminfo[ndx].si_flags |= 1408 SYMINFO_FLG_NOEXTDIRECT; 1409 } 1410 1411 /* 1412 * Indicate that this symbol is acting as an 1413 * individual interposer. 1414 */ 1415 if (sdp->sd_flags & FLG_SY_INTPOSE) { 1416 syminfo[ndx].si_flags |= 1417 SYMINFO_FLG_INTERPOSE; 1418 } 1419 1420 /* 1421 * Indicate that this symbol is deferred, and 1422 * hence should not be bound to during BIND_NOW 1423 * relocations. 1424 */ 1425 if (sdp->sd_flags & FLG_SY_DEFERRED) { 1426 syminfo[ndx].si_flags |= 1427 SYMINFO_FLG_DEFERRED; 1428 } 1429 1430 /* 1431 * If external bindings are allowed, indicate 1432 * the binding, and a direct binding if 1433 * necessary. 1434 */ 1435 if ((sdp->sd_flags & FLG_SY_NDIR) == 0) { 1436 syminfo[ndx].si_flags |= 1437 SYMINFO_FLG_DIRECT; 1438 1439 if (sdp->sd_flags & FLG_SY_DIR) 1440 syminfo[ndx].si_flags |= 1441 SYMINFO_FLG_DIRECTBIND; 1442 1443 /* 1444 * Provide a default boundto definition, 1445 * which may be overridden later. 1446 */ 1447 syminfo[ndx].si_boundto = 1448 SYMINFO_BT_SELF; 1449 } 1450 1451 /* 1452 * Indicate that this is a capabilities symbol. 1453 * Note, that this identification only provides 1454 * information regarding the symbol that is 1455 * visible from elfdump(1) -y. The association 1456 * of a symbol to its capabilities is derived 1457 * from a .SUNW_capinfo entry. 1458 */ 1459 if ((sdp->sd_flags & FLG_SY_CAP) && 1460 ofl->ofl_oscapinfo) { 1461 syminfo[ndx].si_flags |= 1462 SYMINFO_FLG_CAP; 1463 } 1464 } 1465 } 1466 1467 /* 1468 * Note that the `sym' value is reset to be one of the new 1469 * symbol table entries. This symbol will be updated further 1470 * depending on the type of the symbol. Process the .symtab 1471 * first, followed by the .dynsym, thus the `sym' value will 1472 * remain as the .dynsym value when the .dynsym is present. 1473 * This ensures that any versioning symbols st_name value will 1474 * be appropriate for the string table used by version 1475 * entries. 1476 */ 1477 if (enter_in_symtab) { 1478 Word _symndx; 1479 1480 if (local) 1481 _symndx = scopesym_ndx; 1482 else 1483 _symndx = symtab_ndx; 1484 1485 symtab[_symndx] = *sdp->sd_sym; 1486 sdp->sd_sym = sym = &symtab[_symndx]; 1487 (void) st_setstring(strtab, name, &stoff); 1488 sym->st_name = stoff; 1489 } 1490 if (dynlocal) { 1491 ldynsym[ldynscopesym_ndx] = *sdp->sd_sym; 1492 sdp->sd_sym = sym = &ldynsym[ldynscopesym_ndx]; 1493 (void) st_setstring(dynstr, name, &stoff); 1494 ldynsym[ldynscopesym_ndx].st_name = stoff; 1495 /* Add it to sort section if it qualifies */ 1496 ADD_TO_DYNSORT(sdp, sym, ELF_ST_TYPE(sym->st_info), 1497 ldynscopesym_ndx); 1498 } 1499 1500 if (dynsym && !local) { 1501 dynsym[dynsym_ndx] = *sdp->sd_sym; 1502 1503 /* 1504 * Provided this isn't an unnamed register symbol, 1505 * update the symbols name and hash value. 1506 */ 1507 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 1508 dynsym[dynsym_ndx].st_name) { 1509 (void) st_setstring(dynstr, name, &stoff); 1510 dynsym[dynsym_ndx].st_name = stoff; 1511 1512 if (stoff) { 1513 Word hashval, _hashndx; 1514 1515 hashval = 1516 sap->sa_hash % ofl->ofl_hashbkts; 1517 1518 /* LINTED */ 1519 if (_hashndx = hashbkt[hashval]) { 1520 while (hashchain[_hashndx]) { 1521 _hashndx = 1522 hashchain[_hashndx]; 1523 } 1524 hashchain[_hashndx] = 1525 sdp->sd_symndx; 1526 } else { 1527 hashbkt[hashval] = 1528 sdp->sd_symndx; 1529 } 1530 } 1531 } 1532 sdp->sd_sym = sym = &dynsym[dynsym_ndx]; 1533 1534 /* 1535 * Add it to sort section if it qualifies. 1536 * The indexes in that section are relative to the 1537 * the adjacent SUNW_ldynsym/dymsym pair, so we 1538 * add the number of items in SUNW_ldynsym to the 1539 * dynsym index. 1540 */ 1541 ADD_TO_DYNSORT(sdp, sym, ELF_ST_TYPE(sym->st_info), 1542 ldynsym_cnt + dynsym_ndx); 1543 } 1544 1545 if (!enter_in_symtab && (!dynsym || (local && !dynlocal))) { 1546 if (!(sdp->sd_flags & FLG_SY_UPREQD)) 1547 continue; 1548 sym = sdp->sd_sym; 1549 } else 1550 sdp->sd_flags &= ~FLG_SY_CLEAN; 1551 1552 /* 1553 * If we have a weak data symbol for which we need the real 1554 * symbol also, save this processing until later. 1555 * 1556 * The exception to this is if the weak/strong have PLT's 1557 * assigned to them. In that case we don't do the post-weak 1558 * processing because the PLT's must be maintained so that we 1559 * can do 'interpositioning' on both of the symbols. 1560 */ 1561 if ((sap->sa_linkndx) && 1562 (ELF_ST_BIND(sym->st_info) == STB_WEAK) && 1563 (!sap->sa_PLTndx)) { 1564 Sym_desc *_sdp; 1565 1566 _sdp = sdp->sd_file->ifl_oldndx[sap->sa_linkndx]; 1567 1568 if (_sdp->sd_ref != REF_DYN_SEEN) { 1569 Wk_desc wk; 1570 1571 if (enter_in_symtab) { 1572 if (local) { 1573 wk.wk_symtab = 1574 &symtab[scopesym_ndx]; 1575 scopesym_ndx++; 1576 } else { 1577 wk.wk_symtab = 1578 &symtab[symtab_ndx]; 1579 symtab_ndx++; 1580 } 1581 } else { 1582 wk.wk_symtab = NULL; 1583 } 1584 if (dynsym) { 1585 if (!local) { 1586 wk.wk_dynsym = 1587 &dynsym[dynsym_ndx]; 1588 dynsym_ndx++; 1589 } else if (dynlocal) { 1590 wk.wk_dynsym = 1591 &ldynsym[ldynscopesym_ndx]; 1592 ldynscopesym_ndx++; 1593 } 1594 } else { 1595 wk.wk_dynsym = NULL; 1596 } 1597 wk.wk_weak = sdp; 1598 wk.wk_alias = _sdp; 1599 1600 if (alist_append(&weak, &wk, 1601 sizeof (Wk_desc), AL_CNT_WEAK) == NULL) 1602 return ((Addr)S_ERROR); 1603 1604 continue; 1605 } 1606 } 1607 1608 DBG_CALL(Dbg_syms_old(ofl, sdp)); 1609 1610 spec = NULL; 1611 /* 1612 * assign new symbol value. 1613 */ 1614 sectndx = sdp->sd_shndx; 1615 if (sectndx == SHN_UNDEF) { 1616 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) && 1617 (sym->st_value != 0)) { 1618 ld_eprintf(ofl, ERR_WARNING, 1619 MSG_INTL(MSG_SYM_NOTNULL), 1620 demangle(name), sdp->sd_file->ifl_name); 1621 } 1622 1623 /* 1624 * Undefined weak global, if we are generating a static 1625 * executable, output as an absolute zero. Otherwise 1626 * leave it as is, ld.so.1 will skip symbols of this 1627 * type (this technique allows applications and 1628 * libraries to test for the existence of a symbol as an 1629 * indication of the presence or absence of certain 1630 * functionality). 1631 */ 1632 if (OFL_IS_STATIC_EXEC(ofl) && 1633 (ELF_ST_BIND(sym->st_info) == STB_WEAK)) { 1634 sdp->sd_flags |= FLG_SY_SPECSEC; 1635 sdp->sd_shndx = sectndx = SHN_ABS; 1636 } 1637 } else if ((sdp->sd_flags & FLG_SY_SPECSEC) && 1638 (sectndx == SHN_COMMON)) { 1639 /* COMMONs have already been processed */ 1640 /* EMPTY */ 1641 ; 1642 } else { 1643 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 1644 (sectndx == SHN_ABS)) 1645 spec = sdp->sd_aux->sa_symspec; 1646 1647 /* LINTED */ 1648 if (sdp->sd_flags & FLG_SY_COMMEXP) { 1649 /* 1650 * This is (or was) a COMMON symbol which was 1651 * processed above - no processing 1652 * required here. 1653 */ 1654 ; 1655 } else if (sdp->sd_ref == REF_DYN_NEED) { 1656 uchar_t type, bind; 1657 1658 sectndx = SHN_UNDEF; 1659 sym->st_value = 0; 1660 sym->st_size = 0; 1661 1662 /* 1663 * Make sure this undefined symbol is returned 1664 * to the same binding as was defined in the 1665 * original relocatable object reference. 1666 */ 1667 type = ELF_ST_TYPE(sym-> st_info); 1668 if (sdp->sd_flags & FLG_SY_GLOBREF) 1669 bind = STB_GLOBAL; 1670 else 1671 bind = STB_WEAK; 1672 1673 sym->st_info = ELF_ST_INFO(bind, type); 1674 1675 } else if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1676 (sdp->sd_ref == REF_REL_NEED)) { 1677 osp = sdp->sd_isc->is_osdesc; 1678 /* LINTED */ 1679 sectndx = elf_ndxscn(osp->os_scn); 1680 1681 /* 1682 * In an executable, the new symbol value is the 1683 * old value (offset into defining section) plus 1684 * virtual address of defining section. In a 1685 * relocatable, the new value is the old value 1686 * plus the displacement of the section within 1687 * the file. 1688 */ 1689 /* LINTED */ 1690 sym->st_value += 1691 (Off)_elf_getxoff(sdp->sd_isc->is_indata); 1692 1693 if (!(flags & FLG_OF_RELOBJ)) { 1694 sym->st_value += osp->os_shdr->sh_addr; 1695 /* 1696 * TLS symbols are relative to 1697 * the TLS segment. 1698 */ 1699 if ((ELF_ST_TYPE(sym->st_info) == 1700 STT_TLS) && (ofl->ofl_tlsphdr)) 1701 sym->st_value -= 1702 ofl->ofl_tlsphdr->p_vaddr; 1703 } 1704 } 1705 } 1706 1707 if (spec) { 1708 switch (spec) { 1709 case SDAUX_ID_ETEXT: 1710 sym->st_value = etext; 1711 sectndx = etext_ndx; 1712 if (etext_abs) 1713 sdp->sd_flags |= FLG_SY_SPECSEC; 1714 else 1715 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1716 break; 1717 case SDAUX_ID_EDATA: 1718 sym->st_value = edata; 1719 sectndx = edata_ndx; 1720 if (edata_abs) 1721 sdp->sd_flags |= FLG_SY_SPECSEC; 1722 else 1723 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1724 break; 1725 case SDAUX_ID_END: 1726 sym->st_value = end; 1727 sectndx = end_ndx; 1728 if (end_abs) 1729 sdp->sd_flags |= FLG_SY_SPECSEC; 1730 else 1731 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1732 break; 1733 case SDAUX_ID_START: 1734 sym->st_value = start; 1735 sectndx = start_ndx; 1736 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1737 break; 1738 case SDAUX_ID_DYN: 1739 if (flags & FLG_OF_DYNAMIC) { 1740 sym->st_value = ofl-> 1741 ofl_osdynamic->os_shdr->sh_addr; 1742 /* LINTED */ 1743 sectndx = elf_ndxscn( 1744 ofl->ofl_osdynamic->os_scn); 1745 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1746 } 1747 break; 1748 case SDAUX_ID_PLT: 1749 if (ofl->ofl_osplt) { 1750 sym->st_value = ofl-> 1751 ofl_osplt->os_shdr->sh_addr; 1752 /* LINTED */ 1753 sectndx = elf_ndxscn( 1754 ofl->ofl_osplt->os_scn); 1755 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1756 } 1757 break; 1758 case SDAUX_ID_GOT: 1759 /* 1760 * Symbol bias for negative growing tables is 1761 * stored in symbol's value during 1762 * allocate_got(). 1763 */ 1764 sym->st_value += ofl-> 1765 ofl_osgot->os_shdr->sh_addr; 1766 /* LINTED */ 1767 sectndx = elf_ndxscn(ofl-> 1768 ofl_osgot->os_scn); 1769 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1770 break; 1771 default: 1772 /* NOTHING */ 1773 ; 1774 } 1775 } 1776 1777 /* 1778 * If a plt index has been assigned to an undefined function, 1779 * update the symbols value to the appropriate .plt address. 1780 */ 1781 if ((flags & FLG_OF_DYNAMIC) && (flags & FLG_OF_EXEC) && 1782 (sdp->sd_file) && 1783 (sdp->sd_file->ifl_ehdr->e_type == ET_DYN) && 1784 (ELF_ST_TYPE(sym->st_info) == STT_FUNC) && 1785 !(flags & FLG_OF_BFLAG)) { 1786 if (sap->sa_PLTndx) 1787 sym->st_value = 1788 (*ld_targ.t_mr.mr_calc_plt_addr)(sdp, ofl); 1789 } 1790 1791 /* 1792 * Finish updating the symbols. 1793 */ 1794 1795 /* 1796 * Sym Update: if scoped local - set local binding 1797 */ 1798 if (local) 1799 sym->st_info = ELF_ST_INFO(STB_LOCAL, 1800 ELF_ST_TYPE(sym->st_info)); 1801 1802 /* 1803 * Sym Updated: If both the .symtab and .dynsym 1804 * are present then we've actually updated the information in 1805 * the .dynsym, therefore copy this same information to the 1806 * .symtab entry. 1807 */ 1808 sdp->sd_shndx = sectndx; 1809 if (enter_in_symtab && dynsym && (!local || dynlocal)) { 1810 Word _symndx = dynlocal ? scopesym_ndx : symtab_ndx; 1811 1812 symtab[_symndx].st_value = sym->st_value; 1813 symtab[_symndx].st_size = sym->st_size; 1814 symtab[_symndx].st_info = sym->st_info; 1815 symtab[_symndx].st_other = sym->st_other; 1816 } 1817 1818 if (enter_in_symtab) { 1819 Word _symndx; 1820 1821 if (local) 1822 _symndx = scopesym_ndx++; 1823 else 1824 _symndx = symtab_ndx++; 1825 if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1826 (sectndx >= SHN_LORESERVE)) { 1827 assert(symshndx != NULL); 1828 symshndx[_symndx] = sectndx; 1829 symtab[_symndx].st_shndx = SHN_XINDEX; 1830 } else { 1831 /* LINTED */ 1832 symtab[_symndx].st_shndx = (Half)sectndx; 1833 } 1834 } 1835 1836 if (dynsym && (!local || dynlocal)) { 1837 /* 1838 * dynsym and ldynsym are distinct tables, so 1839 * we use indirection to access the right one 1840 * and the related extended section index array. 1841 */ 1842 Word _symndx; 1843 Sym *_dynsym; 1844 Word *_dynshndx; 1845 1846 if (!local) { 1847 _symndx = dynsym_ndx++; 1848 _dynsym = dynsym; 1849 _dynshndx = dynshndx; 1850 } else { 1851 _symndx = ldynscopesym_ndx++; 1852 _dynsym = ldynsym; 1853 _dynshndx = ldynshndx; 1854 } 1855 if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1856 (sectndx >= SHN_LORESERVE)) { 1857 assert(_dynshndx != NULL); 1858 _dynshndx[_symndx] = sectndx; 1859 _dynsym[_symndx].st_shndx = SHN_XINDEX; 1860 } else { 1861 /* LINTED */ 1862 _dynsym[_symndx].st_shndx = (Half)sectndx; 1863 } 1864 } 1865 1866 DBG_CALL(Dbg_syms_new(ofl, sym, sdp)); 1867 } 1868 1869 /* 1870 * Now that all the symbols have been processed update any weak symbols 1871 * information (ie. copy all information except `st_name'). As both 1872 * symbols will be represented in the output, return the weak symbol to 1873 * its correct type. 1874 */ 1875 for (ALIST_TRAVERSE(weak, idx1, wkp)) { 1876 Sym_desc *sdp, *_sdp; 1877 Sym *sym, *_sym, *__sym; 1878 uchar_t bind; 1879 1880 sdp = wkp->wk_weak; 1881 _sdp = wkp->wk_alias; 1882 _sym = __sym = _sdp->sd_sym; 1883 1884 sdp->sd_flags |= FLG_SY_WEAKDEF; 1885 1886 /* 1887 * If the symbol definition has been scoped then assign it to 1888 * be local, otherwise if it's from a shared object then we need 1889 * to maintain the binding of the original reference. 1890 */ 1891 if (SYM_IS_HIDDEN(sdp)) { 1892 if (ld_sym_reducable(ofl, sdp)) 1893 bind = STB_LOCAL; 1894 else 1895 bind = STB_WEAK; 1896 } else if ((sdp->sd_ref == REF_DYN_NEED) && 1897 (sdp->sd_flags & FLG_SY_GLOBREF)) 1898 bind = STB_GLOBAL; 1899 else 1900 bind = STB_WEAK; 1901 1902 DBG_CALL(Dbg_syms_old(ofl, sdp)); 1903 if ((sym = wkp->wk_symtab) != NULL) { 1904 sym->st_value = _sym->st_value; 1905 sym->st_size = _sym->st_size; 1906 sym->st_other = _sym->st_other; 1907 sym->st_shndx = _sym->st_shndx; 1908 sym->st_info = ELF_ST_INFO(bind, 1909 ELF_ST_TYPE(sym->st_info)); 1910 __sym = sym; 1911 } 1912 if ((sym = wkp->wk_dynsym) != NULL) { 1913 sym->st_value = _sym->st_value; 1914 sym->st_size = _sym->st_size; 1915 sym->st_other = _sym->st_other; 1916 sym->st_shndx = _sym->st_shndx; 1917 sym->st_info = ELF_ST_INFO(bind, 1918 ELF_ST_TYPE(sym->st_info)); 1919 __sym = sym; 1920 } 1921 DBG_CALL(Dbg_syms_new(ofl, __sym, sdp)); 1922 } 1923 1924 /* 1925 * Now display GOT debugging information if required. 1926 */ 1927 DBG_CALL(Dbg_got_display(ofl, 0, 0, 1928 ld_targ.t_m.m_got_xnumber, ld_targ.t_m.m_got_entsize)); 1929 1930 /* 1931 * Update the section headers information. sh_info is 1932 * supposed to contain the offset at which the first 1933 * global symbol resides in the symbol table, while 1934 * sh_link contains the section index of the associated 1935 * string table. 1936 */ 1937 if (symtab) { 1938 Shdr *shdr = ofl->ofl_ossymtab->os_shdr; 1939 1940 shdr->sh_info = symtab_gbl_bndx; 1941 /* LINTED */ 1942 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osstrtab->os_scn); 1943 if (symshndx) 1944 ofl->ofl_ossymshndx->os_shdr->sh_link = 1945 (Word)elf_ndxscn(ofl->ofl_ossymtab->os_scn); 1946 1947 /* 1948 * Ensure that the expected number of symbols 1949 * were entered into the right spots: 1950 * - Scoped symbols in the right range 1951 * - Globals start at the right spot 1952 * (correct number of locals entered) 1953 * - The table is exactly filled 1954 * (correct number of globals entered) 1955 */ 1956 assert((scopesym_bndx + ofl->ofl_scopecnt) == scopesym_ndx); 1957 assert(shdr->sh_info == SYMTAB_LOC_CNT(ofl)); 1958 assert((shdr->sh_info + ofl->ofl_globcnt) == symtab_ndx); 1959 } 1960 if (dynsym) { 1961 Shdr *shdr = ofl->ofl_osdynsym->os_shdr; 1962 1963 shdr->sh_info = DYNSYM_LOC_CNT(ofl); 1964 /* LINTED */ 1965 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 1966 1967 ofl->ofl_oshash->os_shdr->sh_link = 1968 /* LINTED */ 1969 (Word)elf_ndxscn(ofl->ofl_osdynsym->os_scn); 1970 if (dynshndx) { 1971 shdr = ofl->ofl_osdynshndx->os_shdr; 1972 shdr->sh_link = 1973 (Word)elf_ndxscn(ofl->ofl_osdynsym->os_scn); 1974 } 1975 } 1976 if (ldynsym) { 1977 Shdr *shdr = ofl->ofl_osldynsym->os_shdr; 1978 1979 /* ldynsym has no globals, so give index one past the end */ 1980 shdr->sh_info = ldynsym_ndx; 1981 1982 /* 1983 * The ldynsym and dynsym must be adjacent. The 1984 * idea is that rtld should be able to start with 1985 * the ldynsym and march straight through the end 1986 * of dynsym, seeing them as a single symbol table, 1987 * despite the fact that they are in distinct sections. 1988 * Ensure that this happened correctly. 1989 * 1990 * Note that I use ldynsym_ndx here instead of the 1991 * computation I used to set the section size 1992 * (found in ldynsym_cnt). The two will agree, unless 1993 * we somehow miscounted symbols or failed to insert them 1994 * all. Using ldynsym_ndx here catches that error in 1995 * addition to checking for adjacency. 1996 */ 1997 assert(dynsym == (ldynsym + ldynsym_ndx)); 1998 1999 2000 /* LINTED */ 2001 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 2002 2003 if (ldynshndx) { 2004 shdr = ofl->ofl_osldynshndx->os_shdr; 2005 shdr->sh_link = 2006 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 2007 } 2008 2009 /* 2010 * The presence of .SUNW_ldynsym means that there may be 2011 * associated sort sections, one for regular symbols 2012 * and the other for TLS. Each sort section needs the 2013 * following done: 2014 * - Section header link references .SUNW_ldynsym 2015 * - Should have received the expected # of items 2016 * - Sorted by increasing address 2017 */ 2018 if (ofl->ofl_osdynsymsort) { /* .SUNW_dynsymsort */ 2019 ofl->ofl_osdynsymsort->os_shdr->sh_link = 2020 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 2021 assert(ofl->ofl_dynsymsortcnt == dynsymsort_ndx); 2022 2023 if (dynsymsort_ndx > 1) { 2024 dynsort_compare_syms = ldynsym; 2025 qsort(dynsymsort, dynsymsort_ndx, 2026 sizeof (*dynsymsort), dynsort_compare); 2027 dynsort_dupwarn(ofl, ldynsym, 2028 st_getstrbuf(dynstr), 2029 dynsymsort, dynsymsort_ndx, 2030 MSG_ORIG(MSG_SCN_DYNSYMSORT)); 2031 } 2032 } 2033 if (ofl->ofl_osdyntlssort) { /* .SUNW_dyntlssort */ 2034 ofl->ofl_osdyntlssort->os_shdr->sh_link = 2035 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 2036 assert(ofl->ofl_dyntlssortcnt == dyntlssort_ndx); 2037 2038 if (dyntlssort_ndx > 1) { 2039 dynsort_compare_syms = ldynsym; 2040 qsort(dyntlssort, dyntlssort_ndx, 2041 sizeof (*dyntlssort), dynsort_compare); 2042 dynsort_dupwarn(ofl, ldynsym, 2043 st_getstrbuf(dynstr), 2044 dyntlssort, dyntlssort_ndx, 2045 MSG_ORIG(MSG_SCN_DYNTLSSORT)); 2046 } 2047 } 2048 } 2049 2050 /* 2051 * Used by ld.so.1 only. 2052 */ 2053 return (etext); 2054 2055 #undef ADD_TO_DYNSORT 2056 } 2057 2058 /* 2059 * Build the dynamic section. 2060 * 2061 * This routine must be maintained in parallel with make_dynamic() 2062 * in sections.c 2063 */ 2064 static int 2065 update_odynamic(Ofl_desc *ofl) 2066 { 2067 Aliste idx; 2068 Ifl_desc *ifl; 2069 Sym_desc *sdp; 2070 Shdr *shdr; 2071 Dyn *_dyn = (Dyn *)ofl->ofl_osdynamic->os_outdata->d_buf; 2072 Dyn *dyn; 2073 Os_desc *symosp, *strosp; 2074 Str_tbl *strtbl; 2075 size_t stoff; 2076 ofl_flag_t flags = ofl->ofl_flags; 2077 int not_relobj = !(flags & FLG_OF_RELOBJ); 2078 Word cnt; 2079 2080 /* 2081 * Relocatable objects can be built with -r and -dy to trigger the 2082 * creation of a .dynamic section. This model is used to create kernel 2083 * device drivers. The .dynamic section provides a subset of userland 2084 * .dynamic entries, typically entries such as DT_NEEDED and DT_RUNPATH. 2085 * 2086 * Within a dynamic object, any .dynamic string references are to the 2087 * .dynstr table. Within a relocatable object, these strings can reside 2088 * within the .strtab. 2089 */ 2090 if (OFL_IS_STATIC_OBJ(ofl)) { 2091 symosp = ofl->ofl_ossymtab; 2092 strosp = ofl->ofl_osstrtab; 2093 strtbl = ofl->ofl_strtab; 2094 } else { 2095 symosp = ofl->ofl_osdynsym; 2096 strosp = ofl->ofl_osdynstr; 2097 strtbl = ofl->ofl_dynstrtab; 2098 } 2099 2100 /* LINTED */ 2101 ofl->ofl_osdynamic->os_shdr->sh_link = (Word)elf_ndxscn(strosp->os_scn); 2102 2103 dyn = _dyn; 2104 2105 for (APLIST_TRAVERSE(ofl->ofl_sos, idx, ifl)) { 2106 if ((ifl->ifl_flags & 2107 (FLG_IF_IGNORE | FLG_IF_DEPREQD)) == FLG_IF_IGNORE) 2108 continue; 2109 2110 /* 2111 * Create and set up the DT_POSFLAG_1 entry here if required. 2112 */ 2113 if ((ifl->ifl_flags & MSK_IF_POSFLAG1) && 2114 (ifl->ifl_flags & FLG_IF_NEEDED) && not_relobj) { 2115 dyn->d_tag = DT_POSFLAG_1; 2116 if (ifl->ifl_flags & FLG_IF_LAZYLD) 2117 dyn->d_un.d_val = DF_P1_LAZYLOAD; 2118 if (ifl->ifl_flags & FLG_IF_GRPPRM) 2119 dyn->d_un.d_val |= DF_P1_GROUPPERM; 2120 if (ifl->ifl_flags & FLG_IF_DEFERRED) 2121 dyn->d_un.d_val |= DF_P1_DEFERRED; 2122 dyn++; 2123 } 2124 2125 if (ifl->ifl_flags & (FLG_IF_NEEDED | FLG_IF_NEEDSTR)) 2126 dyn->d_tag = DT_NEEDED; 2127 else 2128 continue; 2129 2130 (void) st_setstring(strtbl, ifl->ifl_soname, &stoff); 2131 dyn->d_un.d_val = stoff; 2132 /* LINTED */ 2133 ifl->ifl_neededndx = (Half)(((uintptr_t)dyn - (uintptr_t)_dyn) / 2134 sizeof (Dyn)); 2135 dyn++; 2136 } 2137 2138 if (not_relobj) { 2139 if (ofl->ofl_dtsfltrs != NULL) { 2140 Dfltr_desc *dftp; 2141 2142 for (ALIST_TRAVERSE(ofl->ofl_dtsfltrs, idx, dftp)) { 2143 if (dftp->dft_flag == FLG_SY_AUXFLTR) 2144 dyn->d_tag = DT_SUNW_AUXILIARY; 2145 else 2146 dyn->d_tag = DT_SUNW_FILTER; 2147 2148 (void) st_setstring(strtbl, dftp->dft_str, 2149 &stoff); 2150 dyn->d_un.d_val = stoff; 2151 dftp->dft_ndx = (Half)(((uintptr_t)dyn - 2152 (uintptr_t)_dyn) / sizeof (Dyn)); 2153 dyn++; 2154 } 2155 } 2156 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_INIT_U), 2157 SYM_NOHASH, 0, ofl)) != NULL) && 2158 (sdp->sd_ref == REF_REL_NEED) && 2159 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 2160 dyn->d_tag = DT_INIT; 2161 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2162 dyn++; 2163 } 2164 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_FINI_U), 2165 SYM_NOHASH, 0, ofl)) != NULL) && 2166 (sdp->sd_ref == REF_REL_NEED) && 2167 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 2168 dyn->d_tag = DT_FINI; 2169 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2170 dyn++; 2171 } 2172 if (ofl->ofl_soname) { 2173 dyn->d_tag = DT_SONAME; 2174 (void) st_setstring(strtbl, ofl->ofl_soname, &stoff); 2175 dyn->d_un.d_val = stoff; 2176 dyn++; 2177 } 2178 if (ofl->ofl_filtees) { 2179 if (flags & FLG_OF_AUX) { 2180 dyn->d_tag = DT_AUXILIARY; 2181 } else { 2182 dyn->d_tag = DT_FILTER; 2183 } 2184 (void) st_setstring(strtbl, ofl->ofl_filtees, &stoff); 2185 dyn->d_un.d_val = stoff; 2186 dyn++; 2187 } 2188 } 2189 2190 if (ofl->ofl_rpath) { 2191 (void) st_setstring(strtbl, ofl->ofl_rpath, &stoff); 2192 dyn->d_tag = DT_RUNPATH; 2193 dyn->d_un.d_val = stoff; 2194 dyn++; 2195 dyn->d_tag = DT_RPATH; 2196 dyn->d_un.d_val = stoff; 2197 dyn++; 2198 } 2199 2200 if (not_relobj) { 2201 Aliste idx; 2202 Sg_desc *sgp; 2203 2204 if (ofl->ofl_config) { 2205 dyn->d_tag = DT_CONFIG; 2206 (void) st_setstring(strtbl, ofl->ofl_config, &stoff); 2207 dyn->d_un.d_val = stoff; 2208 dyn++; 2209 } 2210 if (ofl->ofl_depaudit) { 2211 dyn->d_tag = DT_DEPAUDIT; 2212 (void) st_setstring(strtbl, ofl->ofl_depaudit, &stoff); 2213 dyn->d_un.d_val = stoff; 2214 dyn++; 2215 } 2216 if (ofl->ofl_audit) { 2217 dyn->d_tag = DT_AUDIT; 2218 (void) st_setstring(strtbl, ofl->ofl_audit, &stoff); 2219 dyn->d_un.d_val = stoff; 2220 dyn++; 2221 } 2222 2223 dyn->d_tag = DT_HASH; 2224 dyn->d_un.d_ptr = ofl->ofl_oshash->os_shdr->sh_addr; 2225 dyn++; 2226 2227 shdr = strosp->os_shdr; 2228 dyn->d_tag = DT_STRTAB; 2229 dyn->d_un.d_ptr = shdr->sh_addr; 2230 dyn++; 2231 2232 dyn->d_tag = DT_STRSZ; 2233 dyn->d_un.d_ptr = shdr->sh_size; 2234 dyn++; 2235 2236 /* 2237 * Note, the shdr is set and used in the ofl->ofl_osldynsym case 2238 * that follows. 2239 */ 2240 shdr = symosp->os_shdr; 2241 dyn->d_tag = DT_SYMTAB; 2242 dyn->d_un.d_ptr = shdr->sh_addr; 2243 dyn++; 2244 2245 dyn->d_tag = DT_SYMENT; 2246 dyn->d_un.d_ptr = shdr->sh_entsize; 2247 dyn++; 2248 2249 if (ofl->ofl_osldynsym) { 2250 Shdr *lshdr = ofl->ofl_osldynsym->os_shdr; 2251 2252 /* 2253 * We have arranged for the .SUNW_ldynsym data to be 2254 * immediately in front of the .dynsym data. 2255 * This means that you could start at the top 2256 * of .SUNW_ldynsym and see the data for both tables 2257 * without a break. This is the view we want to 2258 * provide for DT_SUNW_SYMTAB, which is why we 2259 * add the lengths together. 2260 */ 2261 dyn->d_tag = DT_SUNW_SYMTAB; 2262 dyn->d_un.d_ptr = lshdr->sh_addr; 2263 dyn++; 2264 2265 dyn->d_tag = DT_SUNW_SYMSZ; 2266 dyn->d_un.d_val = lshdr->sh_size + shdr->sh_size; 2267 dyn++; 2268 } 2269 2270 if (ofl->ofl_osdynsymsort || ofl->ofl_osdyntlssort) { 2271 dyn->d_tag = DT_SUNW_SORTENT; 2272 dyn->d_un.d_val = sizeof (Word); 2273 dyn++; 2274 } 2275 2276 if (ofl->ofl_osdynsymsort) { 2277 shdr = ofl->ofl_osdynsymsort->os_shdr; 2278 2279 dyn->d_tag = DT_SUNW_SYMSORT; 2280 dyn->d_un.d_ptr = shdr->sh_addr; 2281 dyn++; 2282 2283 dyn->d_tag = DT_SUNW_SYMSORTSZ; 2284 dyn->d_un.d_val = shdr->sh_size; 2285 dyn++; 2286 } 2287 2288 if (ofl->ofl_osdyntlssort) { 2289 shdr = ofl->ofl_osdyntlssort->os_shdr; 2290 2291 dyn->d_tag = DT_SUNW_TLSSORT; 2292 dyn->d_un.d_ptr = shdr->sh_addr; 2293 dyn++; 2294 2295 dyn->d_tag = DT_SUNW_TLSSORTSZ; 2296 dyn->d_un.d_val = shdr->sh_size; 2297 dyn++; 2298 } 2299 2300 /* 2301 * Reserve the DT_CHECKSUM entry. Its value will be filled in 2302 * after the complete image is built. 2303 */ 2304 dyn->d_tag = DT_CHECKSUM; 2305 ofl->ofl_checksum = &dyn->d_un.d_val; 2306 dyn++; 2307 2308 /* 2309 * Versioning sections: DT_VERDEF and DT_VERNEED. 2310 * 2311 * The Solaris ld does not produce DT_VERSYM, but the GNU ld 2312 * does, in order to support their style of versioning, which 2313 * differs from ours: 2314 * 2315 * - The top bit of the 16-bit Versym index is 2316 * not part of the version, but is interpreted 2317 * as a "hidden bit". 2318 * 2319 * - External (SHN_UNDEF) symbols can have non-zero 2320 * Versym values, which specify versions in 2321 * referenced objects, via the Verneed section. 2322 * 2323 * - The vna_other field of the Vernaux structures 2324 * found in the Verneed section are not zero as 2325 * with Solaris, but instead contain the version 2326 * index to be used by Versym indices to reference 2327 * the given external version. 2328 * 2329 * The Solaris ld, rtld, and elfdump programs all interpret the 2330 * presence of DT_VERSYM as meaning that GNU versioning rules 2331 * apply to the given file. If DT_VERSYM is not present, 2332 * then Solaris versioning rules apply. If we should ever need 2333 * to change our ld so that it does issue DT_VERSYM, then 2334 * this rule for detecting GNU versioning will no longer work. 2335 * In that case, we will have to invent a way to explicitly 2336 * specify the style of versioning in use, perhaps via a 2337 * new dynamic entry named something like DT_SUNW_VERSIONSTYLE, 2338 * where the d_un.d_val value specifies which style is to be 2339 * used. 2340 */ 2341 if ((flags & (FLG_OF_VERDEF | FLG_OF_NOVERSEC)) == 2342 FLG_OF_VERDEF) { 2343 shdr = ofl->ofl_osverdef->os_shdr; 2344 2345 dyn->d_tag = DT_VERDEF; 2346 dyn->d_un.d_ptr = shdr->sh_addr; 2347 dyn++; 2348 dyn->d_tag = DT_VERDEFNUM; 2349 dyn->d_un.d_ptr = shdr->sh_info; 2350 dyn++; 2351 } 2352 if ((flags & (FLG_OF_VERNEED | FLG_OF_NOVERSEC)) == 2353 FLG_OF_VERNEED) { 2354 shdr = ofl->ofl_osverneed->os_shdr; 2355 2356 dyn->d_tag = DT_VERNEED; 2357 dyn->d_un.d_ptr = shdr->sh_addr; 2358 dyn++; 2359 dyn->d_tag = DT_VERNEEDNUM; 2360 dyn->d_un.d_ptr = shdr->sh_info; 2361 dyn++; 2362 } 2363 2364 if ((flags & FLG_OF_COMREL) && ofl->ofl_relocrelcnt) { 2365 dyn->d_tag = ld_targ.t_m.m_rel_dt_count; 2366 dyn->d_un.d_val = ofl->ofl_relocrelcnt; 2367 dyn++; 2368 } 2369 if (flags & FLG_OF_TEXTREL) { 2370 /* 2371 * Only the presence of this entry is used in this 2372 * implementation, not the value stored. 2373 */ 2374 dyn->d_tag = DT_TEXTREL; 2375 dyn->d_un.d_val = 0; 2376 dyn++; 2377 } 2378 2379 if (ofl->ofl_osfiniarray) { 2380 shdr = ofl->ofl_osfiniarray->os_shdr; 2381 2382 dyn->d_tag = DT_FINI_ARRAY; 2383 dyn->d_un.d_ptr = shdr->sh_addr; 2384 dyn++; 2385 2386 dyn->d_tag = DT_FINI_ARRAYSZ; 2387 dyn->d_un.d_val = shdr->sh_size; 2388 dyn++; 2389 } 2390 2391 if (ofl->ofl_osinitarray) { 2392 shdr = ofl->ofl_osinitarray->os_shdr; 2393 2394 dyn->d_tag = DT_INIT_ARRAY; 2395 dyn->d_un.d_ptr = shdr->sh_addr; 2396 dyn++; 2397 2398 dyn->d_tag = DT_INIT_ARRAYSZ; 2399 dyn->d_un.d_val = shdr->sh_size; 2400 dyn++; 2401 } 2402 2403 if (ofl->ofl_ospreinitarray) { 2404 shdr = ofl->ofl_ospreinitarray->os_shdr; 2405 2406 dyn->d_tag = DT_PREINIT_ARRAY; 2407 dyn->d_un.d_ptr = shdr->sh_addr; 2408 dyn++; 2409 2410 dyn->d_tag = DT_PREINIT_ARRAYSZ; 2411 dyn->d_un.d_val = shdr->sh_size; 2412 dyn++; 2413 } 2414 2415 if (ofl->ofl_pltcnt) { 2416 shdr = ofl->ofl_osplt->os_relosdesc->os_shdr; 2417 2418 dyn->d_tag = DT_PLTRELSZ; 2419 dyn->d_un.d_ptr = shdr->sh_size; 2420 dyn++; 2421 dyn->d_tag = DT_PLTREL; 2422 dyn->d_un.d_ptr = ld_targ.t_m.m_rel_dt_type; 2423 dyn++; 2424 dyn->d_tag = DT_JMPREL; 2425 dyn->d_un.d_ptr = shdr->sh_addr; 2426 dyn++; 2427 } 2428 if (ofl->ofl_pltpad) { 2429 shdr = ofl->ofl_osplt->os_shdr; 2430 2431 dyn->d_tag = DT_PLTPAD; 2432 if (ofl->ofl_pltcnt) { 2433 dyn->d_un.d_ptr = shdr->sh_addr + 2434 ld_targ.t_m.m_plt_reservsz + 2435 ofl->ofl_pltcnt * ld_targ.t_m.m_plt_entsize; 2436 } else 2437 dyn->d_un.d_ptr = shdr->sh_addr; 2438 dyn++; 2439 dyn->d_tag = DT_PLTPADSZ; 2440 dyn->d_un.d_val = ofl->ofl_pltpad * 2441 ld_targ.t_m.m_plt_entsize; 2442 dyn++; 2443 } 2444 if (ofl->ofl_relocsz) { 2445 shdr = ofl->ofl_osrelhead->os_shdr; 2446 2447 dyn->d_tag = ld_targ.t_m.m_rel_dt_type; 2448 dyn->d_un.d_ptr = shdr->sh_addr; 2449 dyn++; 2450 dyn->d_tag = ld_targ.t_m.m_rel_dt_size; 2451 dyn->d_un.d_ptr = ofl->ofl_relocsz; 2452 dyn++; 2453 dyn->d_tag = ld_targ.t_m.m_rel_dt_ent; 2454 if (shdr->sh_type == SHT_REL) 2455 dyn->d_un.d_ptr = sizeof (Rel); 2456 else 2457 dyn->d_un.d_ptr = sizeof (Rela); 2458 dyn++; 2459 } 2460 if (ofl->ofl_ossyminfo) { 2461 shdr = ofl->ofl_ossyminfo->os_shdr; 2462 2463 dyn->d_tag = DT_SYMINFO; 2464 dyn->d_un.d_ptr = shdr->sh_addr; 2465 dyn++; 2466 dyn->d_tag = DT_SYMINSZ; 2467 dyn->d_un.d_val = shdr->sh_size; 2468 dyn++; 2469 dyn->d_tag = DT_SYMINENT; 2470 dyn->d_un.d_val = sizeof (Syminfo); 2471 dyn++; 2472 } 2473 if (ofl->ofl_osmove) { 2474 shdr = ofl->ofl_osmove->os_shdr; 2475 2476 dyn->d_tag = DT_MOVETAB; 2477 dyn->d_un.d_val = shdr->sh_addr; 2478 dyn++; 2479 dyn->d_tag = DT_MOVESZ; 2480 dyn->d_un.d_val = shdr->sh_size; 2481 dyn++; 2482 dyn->d_tag = DT_MOVEENT; 2483 dyn->d_un.d_val = shdr->sh_entsize; 2484 dyn++; 2485 } 2486 if (ofl->ofl_regsymcnt) { 2487 int ndx; 2488 2489 for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 2490 if ((sdp = ofl->ofl_regsyms[ndx]) == NULL) 2491 continue; 2492 2493 dyn->d_tag = ld_targ.t_m.m_dt_register; 2494 dyn->d_un.d_val = sdp->sd_symndx; 2495 dyn++; 2496 } 2497 } 2498 2499 for (APLIST_TRAVERSE(ofl->ofl_rtldinfo, idx, sdp)) { 2500 dyn->d_tag = DT_SUNW_RTLDINF; 2501 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2502 dyn++; 2503 } 2504 2505 if (((sgp = ofl->ofl_osdynamic->os_sgdesc) != NULL) && 2506 (sgp->sg_phdr.p_flags & PF_W) && ofl->ofl_osinterp) { 2507 dyn->d_tag = DT_DEBUG; 2508 dyn->d_un.d_ptr = 0; 2509 dyn++; 2510 } 2511 2512 if (ofl->ofl_oscap) { 2513 dyn->d_tag = DT_SUNW_CAP; 2514 dyn->d_un.d_val = ofl->ofl_oscap->os_shdr->sh_addr; 2515 dyn++; 2516 } 2517 if (ofl->ofl_oscapinfo) { 2518 dyn->d_tag = DT_SUNW_CAPINFO; 2519 dyn->d_un.d_val = ofl->ofl_oscapinfo->os_shdr->sh_addr; 2520 dyn++; 2521 } 2522 if (ofl->ofl_oscapchain) { 2523 shdr = ofl->ofl_oscapchain->os_shdr; 2524 2525 dyn->d_tag = DT_SUNW_CAPCHAIN; 2526 dyn->d_un.d_val = shdr->sh_addr; 2527 dyn++; 2528 dyn->d_tag = DT_SUNW_CAPCHAINSZ; 2529 dyn->d_un.d_val = shdr->sh_size; 2530 dyn++; 2531 dyn->d_tag = DT_SUNW_CAPCHAINENT; 2532 dyn->d_un.d_val = shdr->sh_entsize; 2533 dyn++; 2534 } 2535 2536 if (ofl->ofl_aslr != 0) { 2537 dyn->d_tag = DT_SUNW_ASLR; 2538 dyn->d_un.d_val = (ofl->ofl_aslr == 1); 2539 dyn++; 2540 } 2541 2542 if (flags & FLG_OF_SYMBOLIC) { 2543 dyn->d_tag = DT_SYMBOLIC; 2544 dyn->d_un.d_val = 0; 2545 dyn++; 2546 } 2547 } 2548 2549 dyn->d_tag = DT_FLAGS; 2550 dyn->d_un.d_val = ofl->ofl_dtflags; 2551 dyn++; 2552 2553 /* 2554 * If -Bdirect was specified, but some NODIRECT symbols were specified 2555 * via a mapfile, or -znodirect was used on the command line, then 2556 * clear the DF_1_DIRECT flag. The resultant object will use per-symbol 2557 * direct bindings rather than be enabled for global direct bindings. 2558 * 2559 * If any no-direct bindings exist within this object, set the 2560 * DF_1_NODIRECT flag. ld(1) recognizes this flag when processing 2561 * dependencies, and performs extra work to ensure that no direct 2562 * bindings are established to the no-direct symbols that exist 2563 * within these dependencies. 2564 */ 2565 if (ofl->ofl_flags1 & FLG_OF1_NGLBDIR) 2566 ofl->ofl_dtflags_1 &= ~DF_1_DIRECT; 2567 if (ofl->ofl_flags1 & FLG_OF1_NDIRECT) 2568 ofl->ofl_dtflags_1 |= DF_1_NODIRECT; 2569 2570 dyn->d_tag = DT_FLAGS_1; 2571 dyn->d_un.d_val = ofl->ofl_dtflags_1; 2572 dyn++; 2573 2574 dyn->d_tag = DT_SUNW_STRPAD; 2575 dyn->d_un.d_val = DYNSTR_EXTRA_PAD; 2576 dyn++; 2577 2578 dyn->d_tag = DT_SUNW_LDMACH; 2579 dyn->d_un.d_val = ld_sunw_ldmach(); 2580 dyn++; 2581 2582 (*ld_targ.t_mr.mr_mach_update_odynamic)(ofl, &dyn); 2583 2584 for (cnt = 1 + DYNAMIC_EXTRA_ELTS; cnt--; dyn++) { 2585 dyn->d_tag = DT_NULL; 2586 dyn->d_un.d_val = 0; 2587 } 2588 2589 /* 2590 * Ensure that we wrote the right number of entries. If not, we either 2591 * miscounted in make_dynamic(), or we did something wrong in this 2592 * function. 2593 */ 2594 assert((ofl->ofl_osdynamic->os_shdr->sh_size / 2595 ofl->ofl_osdynamic->os_shdr->sh_entsize) == 2596 ((uintptr_t)dyn - (uintptr_t)_dyn) / sizeof (*dyn)); 2597 2598 return (1); 2599 } 2600 2601 /* 2602 * Build the version definition section 2603 */ 2604 static int 2605 update_overdef(Ofl_desc *ofl) 2606 { 2607 Aliste idx1; 2608 Ver_desc *vdp, *_vdp; 2609 Verdef *vdf, *_vdf; 2610 int num = 0; 2611 Os_desc *strosp; 2612 Str_tbl *strtbl; 2613 2614 /* 2615 * Determine which string table to use. 2616 */ 2617 if (OFL_IS_STATIC_OBJ(ofl)) { 2618 strtbl = ofl->ofl_strtab; 2619 strosp = ofl->ofl_osstrtab; 2620 } else { 2621 strtbl = ofl->ofl_dynstrtab; 2622 strosp = ofl->ofl_osdynstr; 2623 } 2624 2625 /* 2626 * Traverse the version descriptors and update the version structures 2627 * to point to the dynstr name in preparation for building the version 2628 * section structure. 2629 */ 2630 for (APLIST_TRAVERSE(ofl->ofl_verdesc, idx1, vdp)) { 2631 Sym_desc *sdp; 2632 2633 if (vdp->vd_flags & VER_FLG_BASE) { 2634 const char *name = vdp->vd_name; 2635 size_t stoff; 2636 2637 /* 2638 * Create a new string table entry to represent the base 2639 * version name (there is no corresponding symbol for 2640 * this). 2641 */ 2642 (void) st_setstring(strtbl, name, &stoff); 2643 /* LINTED */ 2644 vdp->vd_name = (const char *)stoff; 2645 } else { 2646 sdp = ld_sym_find(vdp->vd_name, vdp->vd_hash, 0, ofl); 2647 /* LINTED */ 2648 vdp->vd_name = (const char *) 2649 (uintptr_t)sdp->sd_sym->st_name; 2650 } 2651 } 2652 2653 _vdf = vdf = (Verdef *)ofl->ofl_osverdef->os_outdata->d_buf; 2654 2655 /* 2656 * Traverse the version descriptors and update the version section to 2657 * reflect each version and its associated dependencies. 2658 */ 2659 for (APLIST_TRAVERSE(ofl->ofl_verdesc, idx1, vdp)) { 2660 Aliste idx2; 2661 Half cnt = 1; 2662 Verdaux *vdap, *_vdap; 2663 2664 _vdap = vdap = (Verdaux *)(vdf + 1); 2665 2666 vdf->vd_version = VER_DEF_CURRENT; 2667 vdf->vd_flags = vdp->vd_flags & MSK_VER_USER; 2668 vdf->vd_ndx = vdp->vd_ndx; 2669 vdf->vd_hash = vdp->vd_hash; 2670 2671 /* LINTED */ 2672 vdap->vda_name = (uintptr_t)vdp->vd_name; 2673 vdap++; 2674 /* LINTED */ 2675 _vdap->vda_next = (Word)((uintptr_t)vdap - (uintptr_t)_vdap); 2676 2677 /* 2678 * Traverse this versions dependency list generating the 2679 * appropriate version dependency entries. 2680 */ 2681 for (APLIST_TRAVERSE(vdp->vd_deps, idx2, _vdp)) { 2682 /* LINTED */ 2683 vdap->vda_name = (uintptr_t)_vdp->vd_name; 2684 _vdap = vdap; 2685 vdap++, cnt++; 2686 /* LINTED */ 2687 _vdap->vda_next = (Word)((uintptr_t)vdap - 2688 (uintptr_t)_vdap); 2689 } 2690 _vdap->vda_next = 0; 2691 2692 /* 2693 * Record the versions auxiliary array offset and the associated 2694 * dependency count. 2695 */ 2696 /* LINTED */ 2697 vdf->vd_aux = (Word)((uintptr_t)(vdf + 1) - (uintptr_t)vdf); 2698 vdf->vd_cnt = cnt; 2699 2700 /* 2701 * Record the next versions offset and update the version 2702 * pointer. Remember the previous version offset as the very 2703 * last structures next pointer should be null. 2704 */ 2705 _vdf = vdf; 2706 vdf = (Verdef *)vdap, num++; 2707 /* LINTED */ 2708 _vdf->vd_next = (Word)((uintptr_t)vdf - (uintptr_t)_vdf); 2709 } 2710 _vdf->vd_next = 0; 2711 2712 /* 2713 * Record the string table association with the version definition 2714 * section, and the symbol table associated with the version symbol 2715 * table (the actual contents of the version symbol table are filled 2716 * in during symbol update). 2717 */ 2718 /* LINTED */ 2719 ofl->ofl_osverdef->os_shdr->sh_link = (Word)elf_ndxscn(strosp->os_scn); 2720 2721 /* 2722 * The version definition sections `info' field is used to indicate the 2723 * number of entries in this section. 2724 */ 2725 ofl->ofl_osverdef->os_shdr->sh_info = num; 2726 2727 return (1); 2728 } 2729 2730 /* 2731 * Finish the version symbol index section 2732 */ 2733 static void 2734 update_oversym(Ofl_desc *ofl) 2735 { 2736 Os_desc *osp; 2737 2738 /* 2739 * Record the symbol table associated with the version symbol table. 2740 * The contents of the version symbol table are filled in during 2741 * symbol update. 2742 */ 2743 if (OFL_IS_STATIC_OBJ(ofl)) 2744 osp = ofl->ofl_ossymtab; 2745 else 2746 osp = ofl->ofl_osdynsym; 2747 2748 /* LINTED */ 2749 ofl->ofl_osversym->os_shdr->sh_link = (Word)elf_ndxscn(osp->os_scn); 2750 } 2751 2752 /* 2753 * Build the version needed section 2754 */ 2755 static int 2756 update_overneed(Ofl_desc *ofl) 2757 { 2758 Aliste idx1; 2759 Ifl_desc *ifl; 2760 Verneed *vnd, *_vnd; 2761 Os_desc *strosp; 2762 Str_tbl *strtbl; 2763 Word num = 0; 2764 2765 _vnd = vnd = (Verneed *)ofl->ofl_osverneed->os_outdata->d_buf; 2766 2767 /* 2768 * Determine which string table is appropriate. 2769 */ 2770 if (OFL_IS_STATIC_OBJ(ofl)) { 2771 strosp = ofl->ofl_osstrtab; 2772 strtbl = ofl->ofl_strtab; 2773 } else { 2774 strosp = ofl->ofl_osdynstr; 2775 strtbl = ofl->ofl_dynstrtab; 2776 } 2777 2778 /* 2779 * Traverse the shared object list looking for dependencies that have 2780 * versions defined within them. 2781 */ 2782 for (APLIST_TRAVERSE(ofl->ofl_sos, idx1, ifl)) { 2783 Half _cnt; 2784 Word cnt = 0; 2785 Vernaux *_vnap, *vnap; 2786 size_t stoff; 2787 2788 if (!(ifl->ifl_flags & FLG_IF_VERNEED)) 2789 continue; 2790 2791 vnd->vn_version = VER_NEED_CURRENT; 2792 2793 (void) st_setstring(strtbl, ifl->ifl_soname, &stoff); 2794 vnd->vn_file = stoff; 2795 2796 _vnap = vnap = (Vernaux *)(vnd + 1); 2797 2798 /* 2799 * Traverse the version index list recording 2800 * each version as a needed dependency. 2801 */ 2802 for (_cnt = 0; _cnt <= ifl->ifl_vercnt; _cnt++) { 2803 Ver_index *vip = &ifl->ifl_verndx[_cnt]; 2804 2805 if (vip->vi_flags & FLG_VER_REFER) { 2806 (void) st_setstring(strtbl, vip->vi_name, 2807 &stoff); 2808 vnap->vna_name = stoff; 2809 2810 if (vip->vi_desc) { 2811 vnap->vna_hash = vip->vi_desc->vd_hash; 2812 vnap->vna_flags = 2813 vip->vi_desc->vd_flags; 2814 } else { 2815 vnap->vna_hash = 0; 2816 vnap->vna_flags = 0; 2817 } 2818 vnap->vna_other = vip->vi_overndx; 2819 2820 /* 2821 * If version A inherits version B, then 2822 * B is implicit in A. It suffices for ld.so.1 2823 * to verify A at runtime and skip B. The 2824 * version normalization process sets the INFO 2825 * flag for the versions we want ld.so.1 to 2826 * skip. 2827 */ 2828 if (vip->vi_flags & VER_FLG_INFO) 2829 vnap->vna_flags |= VER_FLG_INFO; 2830 2831 _vnap = vnap; 2832 vnap++, cnt++; 2833 _vnap->vna_next = 2834 /* LINTED */ 2835 (Word)((uintptr_t)vnap - (uintptr_t)_vnap); 2836 } 2837 } 2838 2839 _vnap->vna_next = 0; 2840 2841 /* 2842 * Record the versions auxiliary array offset and 2843 * the associated dependency count. 2844 */ 2845 /* LINTED */ 2846 vnd->vn_aux = (Word)((uintptr_t)(vnd + 1) - (uintptr_t)vnd); 2847 /* LINTED */ 2848 vnd->vn_cnt = (Half)cnt; 2849 2850 /* 2851 * Record the next versions offset and update the version 2852 * pointer. Remember the previous version offset as the very 2853 * last structures next pointer should be null. 2854 */ 2855 _vnd = vnd; 2856 vnd = (Verneed *)vnap, num++; 2857 /* LINTED */ 2858 _vnd->vn_next = (Word)((uintptr_t)vnd - (uintptr_t)_vnd); 2859 } 2860 _vnd->vn_next = 0; 2861 2862 /* 2863 * Use sh_link to record the associated string table section, and 2864 * sh_info to indicate the number of entries contained in the section. 2865 */ 2866 /* LINTED */ 2867 ofl->ofl_osverneed->os_shdr->sh_link = (Word)elf_ndxscn(strosp->os_scn); 2868 ofl->ofl_osverneed->os_shdr->sh_info = num; 2869 2870 return (1); 2871 } 2872 2873 /* 2874 * Update syminfo section. 2875 */ 2876 static uintptr_t 2877 update_osyminfo(Ofl_desc *ofl) 2878 { 2879 Os_desc *symosp, *infosp = ofl->ofl_ossyminfo; 2880 Syminfo *sip = infosp->os_outdata->d_buf; 2881 Shdr *shdr = infosp->os_shdr; 2882 char *strtab; 2883 Aliste idx; 2884 Sym_desc *sdp; 2885 Sfltr_desc *sftp; 2886 2887 if (ofl->ofl_flags & FLG_OF_RELOBJ) { 2888 symosp = ofl->ofl_ossymtab; 2889 strtab = ofl->ofl_osstrtab->os_outdata->d_buf; 2890 } else { 2891 symosp = ofl->ofl_osdynsym; 2892 strtab = ofl->ofl_osdynstr->os_outdata->d_buf; 2893 } 2894 2895 /* LINTED */ 2896 infosp->os_shdr->sh_link = (Word)elf_ndxscn(symosp->os_scn); 2897 if (ofl->ofl_osdynamic) 2898 infosp->os_shdr->sh_info = 2899 /* LINTED */ 2900 (Word)elf_ndxscn(ofl->ofl_osdynamic->os_scn); 2901 2902 /* 2903 * Update any references with the index into the dynamic table. 2904 */ 2905 for (APLIST_TRAVERSE(ofl->ofl_symdtent, idx, sdp)) 2906 sip[sdp->sd_symndx].si_boundto = sdp->sd_file->ifl_neededndx; 2907 2908 /* 2909 * Update any filtee references with the index into the dynamic table. 2910 */ 2911 for (ALIST_TRAVERSE(ofl->ofl_symfltrs, idx, sftp)) { 2912 Dfltr_desc *dftp; 2913 2914 dftp = alist_item(ofl->ofl_dtsfltrs, sftp->sft_idx); 2915 sip[sftp->sft_sdp->sd_symndx].si_boundto = dftp->dft_ndx; 2916 } 2917 2918 /* 2919 * Display debugging information about section. 2920 */ 2921 DBG_CALL(Dbg_syminfo_title(ofl->ofl_lml)); 2922 if (DBG_ENABLED) { 2923 Word _cnt, cnt = shdr->sh_size / shdr->sh_entsize; 2924 Sym *symtab = symosp->os_outdata->d_buf; 2925 Dyn *dyn; 2926 2927 if (ofl->ofl_osdynamic) 2928 dyn = ofl->ofl_osdynamic->os_outdata->d_buf; 2929 else 2930 dyn = NULL; 2931 2932 for (_cnt = 1; _cnt < cnt; _cnt++) { 2933 if (sip[_cnt].si_flags || sip[_cnt].si_boundto) 2934 /* LINTED */ 2935 DBG_CALL(Dbg_syminfo_entry(ofl->ofl_lml, _cnt, 2936 &sip[_cnt], &symtab[_cnt], strtab, dyn)); 2937 } 2938 } 2939 return (1); 2940 } 2941 2942 /* 2943 * Build the output elf header. 2944 */ 2945 static uintptr_t 2946 update_oehdr(Ofl_desc * ofl) 2947 { 2948 Ehdr *ehdr = ofl->ofl_nehdr; 2949 2950 /* 2951 * If an entry point symbol has already been established (refer 2952 * sym_validate()) simply update the elf header entry point with the 2953 * symbols value. If no entry point is defined it will have been filled 2954 * with the start address of the first section within the text segment 2955 * (refer update_outfile()). 2956 */ 2957 if (ofl->ofl_entry) 2958 ehdr->e_entry = 2959 ((Sym_desc *)(ofl->ofl_entry))->sd_sym->st_value; 2960 2961 ehdr->e_ident[EI_DATA] = ld_targ.t_m.m_data; 2962 ehdr->e_version = ofl->ofl_dehdr->e_version; 2963 2964 /* 2965 * When generating a relocatable object under -z symbolcap, set the 2966 * e_machine to be generic, and remove any e_flags. Input relocatable 2967 * objects may identify alternative e_machine (m.machplus) and e_flags 2968 * values. However, the functions within the created output object 2969 * are selected at runtime using the capabilities mechanism, which 2970 * supersedes the e-machine and e_flags information. Therefore, 2971 * e_machine and e_flag values are not propagated to the output object, 2972 * as these values might prevent the kernel from loading the object 2973 * before the runtime linker gets control. 2974 */ 2975 if (ofl->ofl_flags & FLG_OF_OTOSCAP) { 2976 ehdr->e_machine = ld_targ.t_m.m_mach; 2977 ehdr->e_flags = 0; 2978 } else { 2979 /* 2980 * Note. it may be necessary to update the e_flags field in the 2981 * machine dependent section. 2982 */ 2983 ehdr->e_machine = ofl->ofl_dehdr->e_machine; 2984 ehdr->e_flags = ofl->ofl_dehdr->e_flags; 2985 2986 if (ehdr->e_machine != ld_targ.t_m.m_mach) { 2987 if (ehdr->e_machine != ld_targ.t_m.m_machplus) 2988 return (S_ERROR); 2989 if ((ehdr->e_flags & ld_targ.t_m.m_flagsplus) == 0) 2990 return (S_ERROR); 2991 } 2992 } 2993 2994 if (ofl->ofl_flags & FLG_OF_SHAROBJ) 2995 ehdr->e_type = ET_DYN; 2996 else if (ofl->ofl_flags & FLG_OF_RELOBJ) 2997 ehdr->e_type = ET_REL; 2998 else 2999 ehdr->e_type = ET_EXEC; 3000 3001 return (1); 3002 } 3003 3004 /* 3005 * Perform move table expansion. 3006 */ 3007 static void 3008 expand_move(Ofl_desc *ofl, Sym_desc *sdp, Move *mvp) 3009 { 3010 Os_desc *osp; 3011 uchar_t *taddr, *taddr0; 3012 Sxword offset; 3013 Half cnt; 3014 uint_t stride; 3015 3016 osp = ofl->ofl_isparexpn->is_osdesc; 3017 offset = sdp->sd_sym->st_value - osp->os_shdr->sh_addr; 3018 3019 taddr0 = taddr = osp->os_outdata->d_buf; 3020 taddr += offset; 3021 taddr = taddr + mvp->m_poffset; 3022 3023 for (cnt = 0; cnt < mvp->m_repeat; cnt++) { 3024 /* LINTED */ 3025 DBG_CALL(Dbg_move_expand(ofl->ofl_lml, mvp, 3026 (Addr)(taddr - taddr0))); 3027 stride = (uint_t)mvp->m_stride + 1; 3028 3029 /* 3030 * Update the target address based upon the move entry size. 3031 * This size was validated in ld_process_move(). 3032 */ 3033 /* LINTED */ 3034 switch (ELF_M_SIZE(mvp->m_info)) { 3035 case 1: 3036 /* LINTED */ 3037 *taddr = (uchar_t)mvp->m_value; 3038 taddr += stride; 3039 break; 3040 case 2: 3041 /* LINTED */ 3042 *((Half *)taddr) = (Half)mvp->m_value; 3043 taddr += 2 * stride; 3044 break; 3045 case 4: 3046 /* LINTED */ 3047 *((Word *)taddr) = (Word)mvp->m_value; 3048 taddr += 4 * stride; 3049 break; 3050 case 8: 3051 /* LINTED */ 3052 *((u_longlong_t *)taddr) = mvp->m_value; 3053 taddr += 8 * stride; 3054 break; 3055 } 3056 } 3057 } 3058 3059 /* 3060 * Update Move sections. 3061 */ 3062 static void 3063 update_move(Ofl_desc *ofl) 3064 { 3065 Word ndx = 0; 3066 ofl_flag_t flags = ofl->ofl_flags; 3067 Move *omvp; 3068 Aliste idx1; 3069 Sym_desc *sdp; 3070 3071 /* 3072 * Determine the index of the symbol table that will be referenced by 3073 * the Move section. 3074 */ 3075 if (OFL_ALLOW_DYNSYM(ofl)) 3076 /* LINTED */ 3077 ndx = (Word) elf_ndxscn(ofl->ofl_osdynsym->os_scn); 3078 else if (!(flags & FLG_OF_STRIP) || (flags & FLG_OF_RELOBJ)) 3079 /* LINTED */ 3080 ndx = (Word) elf_ndxscn(ofl->ofl_ossymtab->os_scn); 3081 3082 /* 3083 * Update sh_link of the Move section, and point to the new Move data. 3084 */ 3085 if (ofl->ofl_osmove) { 3086 ofl->ofl_osmove->os_shdr->sh_link = ndx; 3087 omvp = (Move *)ofl->ofl_osmove->os_outdata->d_buf; 3088 } 3089 3090 /* 3091 * Update symbol entry index 3092 */ 3093 for (APLIST_TRAVERSE(ofl->ofl_parsyms, idx1, sdp)) { 3094 Aliste idx2; 3095 Mv_desc *mdp; 3096 3097 /* 3098 * Expand move table 3099 */ 3100 if (sdp->sd_flags & FLG_SY_PAREXPN) { 3101 const char *str; 3102 3103 if (flags & FLG_OF_STATIC) 3104 str = MSG_INTL(MSG_PSYM_EXPREASON1); 3105 else if (ofl->ofl_flags1 & FLG_OF1_NOPARTI) 3106 str = MSG_INTL(MSG_PSYM_EXPREASON2); 3107 else 3108 str = MSG_INTL(MSG_PSYM_EXPREASON3); 3109 3110 DBG_CALL(Dbg_move_parexpn(ofl->ofl_lml, 3111 sdp->sd_name, str)); 3112 3113 for (ALIST_TRAVERSE(sdp->sd_move, idx2, mdp)) { 3114 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 0, 3115 mdp->md_move, sdp)); 3116 expand_move(ofl, sdp, mdp->md_move); 3117 } 3118 continue; 3119 } 3120 3121 /* 3122 * Process move table 3123 */ 3124 DBG_CALL(Dbg_move_outmove(ofl->ofl_lml, sdp->sd_name)); 3125 3126 for (ALIST_TRAVERSE(sdp->sd_move, idx2, mdp)) { 3127 Move *imvp; 3128 int idx = 1; 3129 Sym *sym; 3130 3131 imvp = mdp->md_move; 3132 sym = sdp->sd_sym; 3133 3134 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 1, imvp, sdp)); 3135 3136 *omvp = *imvp; 3137 if ((flags & FLG_OF_RELOBJ) == 0) { 3138 if (ELF_ST_BIND(sym->st_info) == STB_LOCAL) { 3139 Os_desc *osp = sdp->sd_isc->is_osdesc; 3140 Word ndx = osp->os_identndx; 3141 3142 omvp->m_info = 3143 /* LINTED */ 3144 ELF_M_INFO(ndx, imvp->m_info); 3145 3146 if (ELF_ST_TYPE(sym->st_info) != 3147 STT_SECTION) { 3148 omvp->m_poffset = 3149 sym->st_value - 3150 osp->os_shdr->sh_addr + 3151 imvp->m_poffset; 3152 } 3153 } else { 3154 omvp->m_info = 3155 /* LINTED */ 3156 ELF_M_INFO(sdp->sd_symndx, 3157 imvp->m_info); 3158 } 3159 } else { 3160 Boolean isredloc = FALSE; 3161 3162 if ((ELF_ST_BIND(sym->st_info) == STB_LOCAL) && 3163 (ofl->ofl_flags & FLG_OF_REDLSYM)) 3164 isredloc = TRUE; 3165 3166 if (isredloc && !(sdp->sd_move)) { 3167 Os_desc *osp = sdp->sd_isc->is_osdesc; 3168 Word ndx = osp->os_identndx; 3169 3170 omvp->m_info = 3171 /* LINTED */ 3172 ELF_M_INFO(ndx, imvp->m_info); 3173 3174 omvp->m_poffset += sym->st_value; 3175 } else { 3176 if (isredloc) 3177 DBG_CALL(Dbg_syms_reduce(ofl, 3178 DBG_SYM_REDUCE_RETAIN, 3179 sdp, idx, 3180 ofl->ofl_osmove->os_name)); 3181 3182 omvp->m_info = 3183 /* LINTED */ 3184 ELF_M_INFO(sdp->sd_symndx, 3185 imvp->m_info); 3186 } 3187 } 3188 3189 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 0, omvp, sdp)); 3190 omvp++; 3191 idx++; 3192 } 3193 } 3194 } 3195 3196 /* 3197 * Scan through the SHT_GROUP output sections. Update their sh_link/sh_info 3198 * fields as well as the section contents. 3199 */ 3200 static uintptr_t 3201 update_ogroup(Ofl_desc *ofl) 3202 { 3203 Aliste idx; 3204 Os_desc *osp; 3205 uintptr_t error = 0; 3206 3207 for (APLIST_TRAVERSE(ofl->ofl_osgroups, idx, osp)) { 3208 Is_desc *isp; 3209 Ifl_desc *ifl; 3210 Shdr *shdr = osp->os_shdr; 3211 Sym_desc *sdp; 3212 Xword i, grpcnt; 3213 Word *gdata; 3214 3215 /* 3216 * Since input GROUP sections always create unique 3217 * output GROUP sections - we know there is only one 3218 * item on the list. 3219 */ 3220 isp = ld_os_first_isdesc(osp); 3221 3222 ifl = isp->is_file; 3223 sdp = ifl->ifl_oldndx[isp->is_shdr->sh_info]; 3224 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_ossymtab->os_scn); 3225 shdr->sh_info = sdp->sd_symndx; 3226 3227 /* 3228 * Scan through the group data section and update 3229 * all of the links to new values. 3230 */ 3231 grpcnt = shdr->sh_size / shdr->sh_entsize; 3232 gdata = (Word *)osp->os_outdata->d_buf; 3233 3234 for (i = 1; i < grpcnt; i++) { 3235 Os_desc *_osp; 3236 Is_desc *_isp = ifl->ifl_isdesc[gdata[i]]; 3237 3238 /* 3239 * If the referenced section didn't make it to the 3240 * output file - just zero out the entry. 3241 */ 3242 if ((_osp = _isp->is_osdesc) == NULL) 3243 gdata[i] = 0; 3244 else 3245 gdata[i] = (Word)elf_ndxscn(_osp->os_scn); 3246 } 3247 } 3248 return (error); 3249 } 3250 3251 static void 3252 update_ostrtab(Os_desc *osp, Str_tbl *stp, uint_t extra) 3253 { 3254 Elf_Data *data; 3255 3256 if (osp == NULL) 3257 return; 3258 3259 data = osp->os_outdata; 3260 assert(data->d_size == (st_getstrtab_sz(stp) + extra)); 3261 (void) st_setstrbuf(stp, data->d_buf, data->d_size - extra); 3262 /* If leaving an extra hole at the end, zero it */ 3263 if (extra > 0) 3264 (void) memset((char *)data->d_buf + data->d_size - extra, 3265 0x0, extra); 3266 } 3267 3268 /* 3269 * Update capabilities information. 3270 * 3271 * If string table capabilities exist, then the associated string must be 3272 * translated into an offset into the string table. 3273 */ 3274 static void 3275 update_oscap(Ofl_desc *ofl) 3276 { 3277 Os_desc *strosp, *cosp; 3278 Cap *cap; 3279 Str_tbl *strtbl; 3280 Capstr *capstr; 3281 size_t stoff; 3282 Aliste idx1; 3283 3284 /* 3285 * Determine which symbol table or string table is appropriate. 3286 */ 3287 if (OFL_IS_STATIC_OBJ(ofl)) { 3288 strosp = ofl->ofl_osstrtab; 3289 strtbl = ofl->ofl_strtab; 3290 } else { 3291 strosp = ofl->ofl_osdynstr; 3292 strtbl = ofl->ofl_dynstrtab; 3293 } 3294 3295 /* 3296 * If symbol capabilities exist, set the sh_link field of the .SUNW_cap 3297 * section to the .SUNW_capinfo section. 3298 */ 3299 if (ofl->ofl_oscapinfo) { 3300 cosp = ofl->ofl_oscap; 3301 cosp->os_shdr->sh_link = 3302 (Word)elf_ndxscn(ofl->ofl_oscapinfo->os_scn); 3303 } 3304 3305 /* 3306 * If there are capability strings to process, set the sh_info 3307 * field of the .SUNW_cap section to the associated string table, and 3308 * proceed to process any CA_SUNW_PLAT entries. 3309 */ 3310 if ((ofl->ofl_flags & FLG_OF_CAPSTRS) == 0) 3311 return; 3312 3313 cosp = ofl->ofl_oscap; 3314 cosp->os_shdr->sh_info = (Word)elf_ndxscn(strosp->os_scn); 3315 3316 cap = ofl->ofl_oscap->os_outdata->d_buf; 3317 3318 /* 3319 * Determine whether an object capability identifier, or object 3320 * machine/platform capabilities exists. 3321 */ 3322 capstr = &ofl->ofl_ocapset.oc_id; 3323 if (capstr->cs_str) { 3324 (void) st_setstring(strtbl, capstr->cs_str, &stoff); 3325 cap[capstr->cs_ndx].c_un.c_ptr = stoff; 3326 } 3327 for (ALIST_TRAVERSE(ofl->ofl_ocapset.oc_plat.cl_val, idx1, capstr)) { 3328 (void) st_setstring(strtbl, capstr->cs_str, &stoff); 3329 cap[capstr->cs_ndx].c_un.c_ptr = stoff; 3330 } 3331 for (ALIST_TRAVERSE(ofl->ofl_ocapset.oc_mach.cl_val, idx1, capstr)) { 3332 (void) st_setstring(strtbl, capstr->cs_str, &stoff); 3333 cap[capstr->cs_ndx].c_un.c_ptr = stoff; 3334 } 3335 3336 /* 3337 * Determine any symbol capability identifiers, or machine/platform 3338 * capabilities. 3339 */ 3340 if (ofl->ofl_capgroups) { 3341 Cap_group *cgp; 3342 3343 for (APLIST_TRAVERSE(ofl->ofl_capgroups, idx1, cgp)) { 3344 Objcapset *ocapset = &cgp->cg_set; 3345 Aliste idx2; 3346 3347 capstr = &ocapset->oc_id; 3348 if (capstr->cs_str) { 3349 (void) st_setstring(strtbl, capstr->cs_str, 3350 &stoff); 3351 cap[capstr->cs_ndx].c_un.c_ptr = stoff; 3352 } 3353 for (ALIST_TRAVERSE(ocapset->oc_plat.cl_val, idx2, 3354 capstr)) { 3355 (void) st_setstring(strtbl, capstr->cs_str, 3356 &stoff); 3357 cap[capstr->cs_ndx].c_un.c_ptr = stoff; 3358 } 3359 for (ALIST_TRAVERSE(ocapset->oc_mach.cl_val, idx2, 3360 capstr)) { 3361 (void) st_setstring(strtbl, capstr->cs_str, 3362 &stoff); 3363 cap[capstr->cs_ndx].c_un.c_ptr = stoff; 3364 } 3365 } 3366 } 3367 } 3368 3369 /* 3370 * Update the .SUNW_capinfo, and possibly the .SUNW_capchain sections. 3371 */ 3372 static void 3373 update_oscapinfo(Ofl_desc *ofl) 3374 { 3375 Os_desc *symosp, *ciosp, *ccosp = NULL; 3376 Capinfo *ocapinfo; 3377 Capchain *ocapchain; 3378 Cap_avlnode *cav; 3379 Word chainndx = 0; 3380 3381 /* 3382 * Determine which symbol table is appropriate. 3383 */ 3384 if (OFL_IS_STATIC_OBJ(ofl)) 3385 symosp = ofl->ofl_ossymtab; 3386 else 3387 symosp = ofl->ofl_osdynsym; 3388 3389 /* 3390 * Update the .SUNW_capinfo sh_link to point to the appropriate symbol 3391 * table section. If we're creating a dynamic object, the 3392 * .SUNW_capinfo sh_info is updated to point to the .SUNW_capchain 3393 * section. 3394 */ 3395 ciosp = ofl->ofl_oscapinfo; 3396 ciosp->os_shdr->sh_link = (Word)elf_ndxscn(symosp->os_scn); 3397 3398 if (OFL_IS_STATIC_OBJ(ofl) == 0) { 3399 ccosp = ofl->ofl_oscapchain; 3400 ciosp->os_shdr->sh_info = (Word)elf_ndxscn(ccosp->os_scn); 3401 } 3402 3403 /* 3404 * Establish the data for each section. The first element of each 3405 * section defines the section's version number. 3406 */ 3407 ocapinfo = ciosp->os_outdata->d_buf; 3408 ocapinfo[0] = CAPINFO_CURRENT; 3409 if (ccosp) { 3410 ocapchain = ccosp->os_outdata->d_buf; 3411 ocapchain[chainndx++] = CAPCHAIN_CURRENT; 3412 } 3413 3414 /* 3415 * Traverse all capabilities families. Each member has a .SUNW_capinfo 3416 * assignment. The .SUNW_capinfo entry differs for relocatable objects 3417 * and dynamic objects. 3418 * 3419 * Relocatable objects: 3420 * ELF_C_GROUP ELF_C_SYM 3421 * 3422 * Family lead: CAPINFO_SUNW_GLOB lead symbol index 3423 * Family lead alias: CAPINFO_SUNW_GLOB lead symbol index 3424 * Family member: .SUNW_cap index lead symbol index 3425 * 3426 * Dynamic objects: 3427 * ELF_C_GROUP ELF_C_SYM 3428 * 3429 * Family lead: CAPINFO_SUNW_GLOB .SUNW_capchain index 3430 * Family lead alias: CAPINFO_SUNW_GLOB .SUNW_capchain index 3431 * Family member: .SUNW_cap index lead symbol index 3432 * 3433 * The ELF_C_GROUP field identifies a capabilities symbol. Lead 3434 * capability symbols, and lead capability aliases are identified by 3435 * a CAPINFO_SUNW_GLOB group identifier. For family members, the 3436 * ELF_C_GROUP provides an index to the associate capabilities group 3437 * (i.e, an index into the SUNW_cap section that defines a group). 3438 * 3439 * For relocatable objects, the ELF_C_SYM field identifies the lead 3440 * capability symbol. For the lead symbol itself, the .SUNW_capinfo 3441 * index is the same as the ELF_C_SYM value. For lead alias symbols, 3442 * the .SUNW_capinfo index differs from the ELF_C_SYM value. This 3443 * differentiation of CAPINFO_SUNW_GLOB symbols allows ld(1) to 3444 * identify, and propagate lead alias symbols. For example, the lead 3445 * capability symbol memcpy() would have the ELF_C_SYM for memcpy(), 3446 * and the lead alias _memcpy() would also have the ELF_C_SYM for 3447 * memcpy(). 3448 * 3449 * For dynamic objects, both a lead capability symbol, and alias symbol 3450 * would have a ELF_C_SYM value that represents the same capability 3451 * chain index. The capability chain allows ld.so.1 to traverse a 3452 * family chain for a given lead symbol, and select the most appropriate 3453 * family member. The .SUNW_capchain array contains a series of symbol 3454 * indexes for each family member: 3455 * 3456 * chaincap[n] chaincap[n + 1] chaincap[n + 2] chaincap[n + x] 3457 * foo() ndx foo%x() ndx foo%y() ndx 0 3458 * 3459 * For family members, the ELF_C_SYM value associates the capability 3460 * members with their family lead symbol. This association, although 3461 * unused within a dynamic object, allows ld(1) to identify, and 3462 * propagate family members when processing relocatable objects. 3463 */ 3464 for (cav = avl_first(ofl->ofl_capfamilies); cav; 3465 cav = AVL_NEXT(ofl->ofl_capfamilies, cav)) { 3466 Cap_sym *csp; 3467 Aliste idx; 3468 Sym_desc *asdp, *lsdp = cav->cn_symavlnode.sav_sdp; 3469 3470 if (ccosp) { 3471 /* 3472 * For a dynamic object, identify this lead symbol, and 3473 * point it to the head of a capability chain. Set the 3474 * head of the capability chain to the same lead symbol. 3475 */ 3476 ocapinfo[lsdp->sd_symndx] = 3477 ELF_C_INFO(chainndx, CAPINFO_SUNW_GLOB); 3478 ocapchain[chainndx] = lsdp->sd_symndx; 3479 } else { 3480 /* 3481 * For a relocatable object, identify this lead symbol, 3482 * and set the lead symbol index to itself. 3483 */ 3484 ocapinfo[lsdp->sd_symndx] = 3485 ELF_C_INFO(lsdp->sd_symndx, CAPINFO_SUNW_GLOB); 3486 } 3487 3488 /* 3489 * Gather any lead symbol aliases. 3490 */ 3491 for (APLIST_TRAVERSE(cav->cn_aliases, idx, asdp)) { 3492 if (ccosp) { 3493 /* 3494 * For a dynamic object, identify this lead 3495 * alias symbol, and point it to the same 3496 * capability chain index as the lead symbol. 3497 */ 3498 ocapinfo[asdp->sd_symndx] = 3499 ELF_C_INFO(chainndx, CAPINFO_SUNW_GLOB); 3500 } else { 3501 /* 3502 * For a relocatable object, identify this lead 3503 * alias symbol, and set the lead symbol index 3504 * to the lead symbol. 3505 */ 3506 ocapinfo[asdp->sd_symndx] = 3507 ELF_C_INFO(lsdp->sd_symndx, 3508 CAPINFO_SUNW_GLOB); 3509 } 3510 } 3511 3512 chainndx++; 3513 3514 /* 3515 * Gather the family members. 3516 */ 3517 for (APLIST_TRAVERSE(cav->cn_members, idx, csp)) { 3518 Sym_desc *msdp = csp->cs_sdp; 3519 3520 /* 3521 * Identify the members capability group, and the lead 3522 * symbol of the family this symbol is a member of. 3523 */ 3524 ocapinfo[msdp->sd_symndx] = 3525 ELF_C_INFO(lsdp->sd_symndx, csp->cs_group->cg_ndx); 3526 if (ccosp) { 3527 /* 3528 * For a dynamic object, set the next capability 3529 * chain to point to this family member. 3530 */ 3531 ocapchain[chainndx++] = msdp->sd_symndx; 3532 } 3533 } 3534 3535 /* 3536 * Any chain of family members is terminated with a 0 element. 3537 */ 3538 if (ccosp) 3539 ocapchain[chainndx++] = 0; 3540 } 3541 } 3542 3543 /* 3544 * Translate the shdr->sh_{link, info} from its input section value to that 3545 * of the corresponding shdr->sh_{link, info} output section value. 3546 */ 3547 static Word 3548 translate_link(Ofl_desc *ofl, Os_desc *osp, Word link, const char *msg) 3549 { 3550 Is_desc *isp; 3551 Ifl_desc *ifl; 3552 3553 /* 3554 * Don't translate the special section numbers. 3555 */ 3556 if (link >= SHN_LORESERVE) 3557 return (link); 3558 3559 /* 3560 * Does this output section translate back to an input file. If not 3561 * then there is no translation to do. In this case we will assume that 3562 * if sh_link has a value, it's the right value. 3563 */ 3564 isp = ld_os_first_isdesc(osp); 3565 if ((ifl = isp->is_file) == NULL) 3566 return (link); 3567 3568 /* 3569 * Sanity check to make sure that the sh_{link, info} value 3570 * is within range for the input file. 3571 */ 3572 if (link >= ifl->ifl_shnum) { 3573 ld_eprintf(ofl, ERR_WARNING, msg, ifl->ifl_name, 3574 EC_WORD(isp->is_scnndx), isp->is_name, EC_XWORD(link)); 3575 return (link); 3576 } 3577 3578 /* 3579 * Follow the link to the input section. 3580 */ 3581 if ((isp = ifl->ifl_isdesc[link]) == NULL) 3582 return (0); 3583 if ((osp = isp->is_osdesc) == NULL) 3584 return (0); 3585 3586 /* LINTED */ 3587 return ((Word)elf_ndxscn(osp->os_scn)); 3588 } 3589 3590 /* 3591 * Having created all of the necessary sections, segments, and associated 3592 * headers, fill in the program headers and update any other data in the 3593 * output image. Some general rules: 3594 * 3595 * - If an interpreter is required always generate a PT_PHDR entry as 3596 * well. It is this entry that triggers the kernel into passing the 3597 * interpreter an aux vector instead of just a file descriptor. 3598 * 3599 * - When generating an image that will be interpreted (ie. a dynamic 3600 * executable, a shared object, or a static executable that has been 3601 * provided with an interpreter - weird, but possible), make the initial 3602 * loadable segment include both the ehdr and phdr[]. Both of these 3603 * tables are used by the interpreter therefore it seems more intuitive 3604 * to explicitly defined them as part of the mapped image rather than 3605 * relying on page rounding by the interpreter to allow their access. 3606 * 3607 * - When generating a static image that does not require an interpreter 3608 * have the first loadable segment indicate the address of the first 3609 * .section as the start address (things like /kernel/unix and ufsboot 3610 * expect this behavior). 3611 */ 3612 uintptr_t 3613 ld_update_outfile(Ofl_desc *ofl) 3614 { 3615 Addr size, etext, vaddr; 3616 Sg_desc *sgp; 3617 Sg_desc *dtracesgp = NULL, *capsgp = NULL, *intpsgp = NULL; 3618 Os_desc *osp; 3619 int phdrndx = 0, segndx = -1, secndx, intppndx, intpsndx; 3620 int dtracepndx, dtracesndx, cappndx, capsndx; 3621 Ehdr *ehdr = ofl->ofl_nehdr; 3622 Shdr *hshdr; 3623 Phdr *_phdr = NULL; 3624 Word phdrsz = (ehdr->e_phnum * ehdr->e_phentsize), shscnndx; 3625 ofl_flag_t flags = ofl->ofl_flags; 3626 Word ehdrsz = ehdr->e_ehsize; 3627 Boolean nobits; 3628 Off offset; 3629 Aliste idx1; 3630 3631 /* 3632 * Initialize the starting address for the first segment. Executables 3633 * have different starting addresses depending upon the target ABI, 3634 * where as shared objects have a starting address of 0. If this is 3635 * a 64-bit executable that is being constructed to run in a restricted 3636 * address space, use an alternative origin that will provide more free 3637 * address space for the the eventual process. 3638 */ 3639 if (ofl->ofl_flags & FLG_OF_EXEC) { 3640 #if defined(_ELF64) 3641 if (ofl->ofl_ocapset.oc_sf_1.cm_val & SF1_SUNW_ADDR32) 3642 vaddr = ld_targ.t_m.m_segm_aorigin; 3643 else 3644 #endif 3645 vaddr = ld_targ.t_m.m_segm_origin; 3646 } else 3647 vaddr = 0; 3648 3649 /* 3650 * Loop through the segment descriptors and pick out what we need. 3651 */ 3652 DBG_CALL(Dbg_seg_title(ofl->ofl_lml)); 3653 for (APLIST_TRAVERSE(ofl->ofl_segs, idx1, sgp)) { 3654 Phdr *phdr = &(sgp->sg_phdr); 3655 Xword p_align; 3656 Aliste idx2; 3657 Sym_desc *sdp; 3658 3659 segndx++; 3660 3661 /* 3662 * If an interpreter is required generate a PT_INTERP and 3663 * PT_PHDR program header entry. The PT_PHDR entry describes 3664 * the program header table itself. This information will be 3665 * passed via the aux vector to the interpreter (ld.so.1). 3666 * The program header array is actually part of the first 3667 * loadable segment (and the PT_PHDR entry is the first entry), 3668 * therefore its virtual address isn't known until the first 3669 * loadable segment is processed. 3670 */ 3671 if (phdr->p_type == PT_PHDR) { 3672 if (ofl->ofl_osinterp) { 3673 phdr->p_offset = ehdr->e_phoff; 3674 phdr->p_filesz = phdr->p_memsz = phdrsz; 3675 3676 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3677 ofl->ofl_phdr[phdrndx++] = *phdr; 3678 } 3679 continue; 3680 } 3681 if (phdr->p_type == PT_INTERP) { 3682 if (ofl->ofl_osinterp) { 3683 intpsgp = sgp; 3684 intpsndx = segndx; 3685 intppndx = phdrndx++; 3686 } 3687 continue; 3688 } 3689 3690 /* 3691 * If we are creating a PT_SUNWDTRACE segment, remember where 3692 * the program header is. The header values are assigned after 3693 * update_osym() has completed and the symbol table addresses 3694 * have been updated. 3695 */ 3696 if (phdr->p_type == PT_SUNWDTRACE) { 3697 if (ofl->ofl_dtracesym && 3698 ((flags & FLG_OF_RELOBJ) == 0)) { 3699 dtracesgp = sgp; 3700 dtracesndx = segndx; 3701 dtracepndx = phdrndx++; 3702 } 3703 continue; 3704 } 3705 3706 /* 3707 * If a hardware/software capabilities section is required, 3708 * generate the PT_SUNWCAP header. Note, as this comes before 3709 * the first loadable segment, we don't yet know its real 3710 * virtual address. This is updated later. 3711 */ 3712 if (phdr->p_type == PT_SUNWCAP) { 3713 if (ofl->ofl_oscap && (ofl->ofl_flags & FLG_OF_PTCAP) && 3714 ((flags & FLG_OF_RELOBJ) == 0)) { 3715 capsgp = sgp; 3716 capsndx = segndx; 3717 cappndx = phdrndx++; 3718 } 3719 continue; 3720 } 3721 3722 /* 3723 * As the dynamic program header occurs after the loadable 3724 * headers in the segment descriptor table, all the address 3725 * information for the .dynamic output section will have been 3726 * figured out by now. 3727 */ 3728 if (phdr->p_type == PT_DYNAMIC) { 3729 if (OFL_ALLOW_DYNSYM(ofl)) { 3730 Shdr *shdr = ofl->ofl_osdynamic->os_shdr; 3731 3732 phdr->p_vaddr = shdr->sh_addr; 3733 phdr->p_offset = shdr->sh_offset; 3734 phdr->p_filesz = shdr->sh_size; 3735 phdr->p_flags = ld_targ.t_m.m_dataseg_perm; 3736 3737 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3738 ofl->ofl_phdr[phdrndx++] = *phdr; 3739 } 3740 continue; 3741 } 3742 3743 /* 3744 * As the unwind (.eh_frame_hdr) program header occurs after 3745 * the loadable headers in the segment descriptor table, all 3746 * the address information for the .eh_frame output section 3747 * will have been figured out by now. 3748 */ 3749 if (phdr->p_type == PT_SUNW_UNWIND) { 3750 Shdr *shdr; 3751 3752 if (ofl->ofl_unwindhdr == NULL) 3753 continue; 3754 3755 shdr = ofl->ofl_unwindhdr->os_shdr; 3756 3757 phdr->p_flags = PF_R; 3758 phdr->p_vaddr = shdr->sh_addr; 3759 phdr->p_memsz = shdr->sh_size; 3760 phdr->p_filesz = shdr->sh_size; 3761 phdr->p_offset = shdr->sh_offset; 3762 phdr->p_align = shdr->sh_addralign; 3763 phdr->p_paddr = 0; 3764 ofl->ofl_phdr[phdrndx++] = *phdr; 3765 continue; 3766 } 3767 3768 /* 3769 * The sunwstack program is used to convey non-default 3770 * flags for the process stack. Only emit it if it would 3771 * change the default. 3772 */ 3773 if (phdr->p_type == PT_SUNWSTACK) { 3774 if (((flags & FLG_OF_RELOBJ) == 0) && 3775 ((sgp->sg_flags & FLG_SG_DISABLED) == 0)) 3776 ofl->ofl_phdr[phdrndx++] = *phdr; 3777 continue; 3778 } 3779 3780 /* 3781 * As the TLS program header occurs after the loadable 3782 * headers in the segment descriptor table, all the address 3783 * information for the .tls output section will have been 3784 * figured out by now. 3785 */ 3786 if (phdr->p_type == PT_TLS) { 3787 Os_desc *tlsosp; 3788 Shdr *lastfileshdr = NULL; 3789 Shdr *firstshdr = NULL, *lastshdr; 3790 Aliste idx; 3791 3792 if (ofl->ofl_ostlsseg == NULL) 3793 continue; 3794 3795 /* 3796 * Scan the output sections that have contributed TLS. 3797 * Remember the first and last so as to determine the 3798 * TLS memory size requirement. Remember the last 3799 * progbits section to determine the TLS data 3800 * contribution, which determines the TLS program 3801 * header filesz. 3802 */ 3803 for (APLIST_TRAVERSE(ofl->ofl_ostlsseg, idx, tlsosp)) { 3804 Shdr *tlsshdr = tlsosp->os_shdr; 3805 3806 if (firstshdr == NULL) 3807 firstshdr = tlsshdr; 3808 if (tlsshdr->sh_type != SHT_NOBITS) 3809 lastfileshdr = tlsshdr; 3810 lastshdr = tlsshdr; 3811 } 3812 3813 phdr->p_flags = PF_R | PF_W; 3814 phdr->p_vaddr = firstshdr->sh_addr; 3815 phdr->p_offset = firstshdr->sh_offset; 3816 phdr->p_align = firstshdr->sh_addralign; 3817 3818 /* 3819 * Determine the initialized TLS data size. This 3820 * address range is from the start of the TLS segment 3821 * to the end of the last piece of initialized data. 3822 */ 3823 if (lastfileshdr) 3824 phdr->p_filesz = lastfileshdr->sh_offset + 3825 lastfileshdr->sh_size - phdr->p_offset; 3826 else 3827 phdr->p_filesz = 0; 3828 3829 /* 3830 * Determine the total TLS memory size. This includes 3831 * all TLS data and TLS uninitialized data. This 3832 * address range is from the start of the TLS segment 3833 * to the memory address of the last piece of 3834 * uninitialized data. 3835 */ 3836 phdr->p_memsz = lastshdr->sh_addr + 3837 lastshdr->sh_size - phdr->p_vaddr; 3838 3839 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3840 ofl->ofl_phdr[phdrndx] = *phdr; 3841 ofl->ofl_tlsphdr = &ofl->ofl_phdr[phdrndx++]; 3842 continue; 3843 } 3844 3845 /* 3846 * If this is an empty segment declaration, it will occur after 3847 * all other loadable segments. As empty segments can be 3848 * defined with fixed addresses, make sure that no loadable 3849 * segments overlap. This might occur as the object evolves 3850 * and the loadable segments grow, thus encroaching upon an 3851 * existing segment reservation. 3852 * 3853 * Segments are only created for dynamic objects, thus this 3854 * checking can be skipped when building a relocatable object. 3855 */ 3856 if (!(flags & FLG_OF_RELOBJ) && 3857 (sgp->sg_flags & FLG_SG_EMPTY)) { 3858 int i; 3859 Addr v_e; 3860 3861 vaddr = phdr->p_vaddr; 3862 phdr->p_memsz = sgp->sg_length; 3863 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3864 ofl->ofl_phdr[phdrndx++] = *phdr; 3865 3866 if (phdr->p_type != PT_LOAD) 3867 continue; 3868 3869 v_e = vaddr + phdr->p_memsz; 3870 3871 /* 3872 * Check overlaps 3873 */ 3874 for (i = 0; i < phdrndx - 1; i++) { 3875 Addr p_s = (ofl->ofl_phdr[i]).p_vaddr; 3876 Addr p_e; 3877 3878 if ((ofl->ofl_phdr[i]).p_type != PT_LOAD) 3879 continue; 3880 3881 p_e = p_s + (ofl->ofl_phdr[i]).p_memsz; 3882 if (((p_s <= vaddr) && (p_e > vaddr)) || 3883 ((vaddr <= p_s) && (v_e > p_s))) 3884 ld_eprintf(ofl, ERR_WARNING, 3885 MSG_INTL(MSG_UPD_SEGOVERLAP), 3886 ofl->ofl_name, EC_ADDR(p_e), 3887 sgp->sg_name, EC_ADDR(vaddr)); 3888 } 3889 continue; 3890 } 3891 3892 /* 3893 * Having processed any of the special program headers any 3894 * remaining headers will be built to express individual 3895 * segments. Segments are only built if they have output 3896 * section descriptors associated with them (ie. some form of 3897 * input section has been matched to this segment). 3898 */ 3899 if (sgp->sg_osdescs == NULL) 3900 continue; 3901 3902 /* 3903 * Determine the segments offset and size from the section 3904 * information provided from elf_update(). 3905 * Allow for multiple NOBITS sections. 3906 */ 3907 osp = sgp->sg_osdescs->apl_data[0]; 3908 hshdr = osp->os_shdr; 3909 3910 phdr->p_filesz = 0; 3911 phdr->p_memsz = 0; 3912 phdr->p_offset = offset = hshdr->sh_offset; 3913 3914 nobits = ((hshdr->sh_type == SHT_NOBITS) && 3915 ((sgp->sg_flags & FLG_SG_PHREQ) == 0)); 3916 3917 for (APLIST_TRAVERSE(sgp->sg_osdescs, idx2, osp)) { 3918 Shdr *shdr = osp->os_shdr; 3919 3920 p_align = 0; 3921 if (shdr->sh_addralign > p_align) 3922 p_align = shdr->sh_addralign; 3923 3924 offset = (Off)S_ROUND(offset, shdr->sh_addralign); 3925 offset += shdr->sh_size; 3926 3927 if (shdr->sh_type != SHT_NOBITS) { 3928 if (nobits) { 3929 ld_eprintf(ofl, ERR_FATAL, 3930 MSG_INTL(MSG_UPD_NOBITS)); 3931 return (S_ERROR); 3932 } 3933 phdr->p_filesz = offset - phdr->p_offset; 3934 } else if ((sgp->sg_flags & FLG_SG_PHREQ) == 0) 3935 nobits = TRUE; 3936 } 3937 phdr->p_memsz = offset - hshdr->sh_offset; 3938 3939 /* 3940 * If this is the first loadable segment of a dynamic object, 3941 * or an interpreter has been specified (a static object built 3942 * with an interpreter will still be given a PT_HDR entry), then 3943 * compensate for the elf header and program header array. Both 3944 * of these are actually part of the loadable segment as they 3945 * may be inspected by the interpreter. Adjust the segments 3946 * size and offset accordingly. 3947 */ 3948 if ((_phdr == NULL) && (phdr->p_type == PT_LOAD) && 3949 ((ofl->ofl_osinterp) || (flags & FLG_OF_DYNAMIC)) && 3950 (!(ofl->ofl_dtflags_1 & DF_1_NOHDR))) { 3951 size = (Addr)S_ROUND((phdrsz + ehdrsz), 3952 hshdr->sh_addralign); 3953 phdr->p_offset -= size; 3954 phdr->p_filesz += size; 3955 phdr->p_memsz += size; 3956 } 3957 3958 /* 3959 * If segment size symbols are required (specified via a 3960 * mapfile) update their value. 3961 */ 3962 for (APLIST_TRAVERSE(sgp->sg_sizesym, idx2, sdp)) 3963 sdp->sd_sym->st_value = phdr->p_memsz; 3964 3965 /* 3966 * If no file content has been assigned to this segment (it 3967 * only contains no-bits sections), then reset the offset for 3968 * consistency. 3969 */ 3970 if (phdr->p_filesz == 0) 3971 phdr->p_offset = 0; 3972 3973 /* 3974 * If a virtual address has been specified for this segment 3975 * from a mapfile use it and make sure the previous segment 3976 * does not run into this segment. 3977 */ 3978 if (phdr->p_type == PT_LOAD) { 3979 if ((sgp->sg_flags & FLG_SG_P_VADDR)) { 3980 if (_phdr && (vaddr > phdr->p_vaddr) && 3981 (phdr->p_type == PT_LOAD)) 3982 ld_eprintf(ofl, ERR_WARNING, 3983 MSG_INTL(MSG_UPD_SEGOVERLAP), 3984 ofl->ofl_name, EC_ADDR(vaddr), 3985 sgp->sg_name, 3986 EC_ADDR(phdr->p_vaddr)); 3987 vaddr = phdr->p_vaddr; 3988 phdr->p_align = 0; 3989 } else { 3990 vaddr = phdr->p_vaddr = 3991 (Addr)S_ROUND(vaddr, phdr->p_align); 3992 } 3993 } 3994 3995 /* 3996 * Adjust the address offset and p_align if needed. 3997 */ 3998 if (((sgp->sg_flags & FLG_SG_P_VADDR) == 0) && 3999 ((ofl->ofl_dtflags_1 & DF_1_NOHDR) == 0)) { 4000 if (phdr->p_align != 0) 4001 vaddr += phdr->p_offset % phdr->p_align; 4002 else 4003 vaddr += phdr->p_offset; 4004 phdr->p_vaddr = vaddr; 4005 } 4006 4007 /* 4008 * If an interpreter is required set the virtual address of the 4009 * PT_PHDR program header now that we know the virtual address 4010 * of the loadable segment that contains it. Update the 4011 * PT_SUNWCAP header similarly. 4012 */ 4013 if ((_phdr == NULL) && (phdr->p_type == PT_LOAD)) { 4014 _phdr = phdr; 4015 4016 if ((ofl->ofl_dtflags_1 & DF_1_NOHDR) == 0) { 4017 if (ofl->ofl_osinterp) 4018 ofl->ofl_phdr[0].p_vaddr = 4019 vaddr + ehdrsz; 4020 4021 /* 4022 * Finally, if we're creating a dynamic object 4023 * (or a static object in which an interpreter 4024 * is specified) update the vaddr to reflect 4025 * the address of the first section within this 4026 * segment. 4027 */ 4028 if ((ofl->ofl_osinterp) || 4029 (flags & FLG_OF_DYNAMIC)) 4030 vaddr += size; 4031 } else { 4032 /* 4033 * If the DF_1_NOHDR flag was set, and an 4034 * interpreter is being generated, the PT_PHDR 4035 * will not be part of any loadable segment. 4036 */ 4037 if (ofl->ofl_osinterp) { 4038 ofl->ofl_phdr[0].p_vaddr = 0; 4039 ofl->ofl_phdr[0].p_memsz = 0; 4040 ofl->ofl_phdr[0].p_flags = 0; 4041 } 4042 } 4043 } 4044 4045 /* 4046 * Ensure the ELF entry point defaults to zero. Typically, this 4047 * value is overridden in update_oehdr() to one of the standard 4048 * entry points. Historically, this default was set to the 4049 * address of first executable section, but this has since been 4050 * found to be more confusing than it is helpful. 4051 */ 4052 ehdr->e_entry = 0; 4053 4054 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 4055 4056 /* 4057 * Traverse the output section descriptors for this segment so 4058 * that we can update the section headers addresses. We've 4059 * calculated the virtual address of the initial section within 4060 * this segment, so each successive section can be calculated 4061 * based on their offsets from each other. 4062 */ 4063 secndx = 0; 4064 hshdr = 0; 4065 for (APLIST_TRAVERSE(sgp->sg_osdescs, idx2, osp)) { 4066 Shdr *shdr = osp->os_shdr; 4067 4068 if (shdr->sh_link) 4069 shdr->sh_link = translate_link(ofl, osp, 4070 shdr->sh_link, MSG_INTL(MSG_FIL_INVSHLINK)); 4071 4072 if (shdr->sh_info && (shdr->sh_flags & SHF_INFO_LINK)) 4073 shdr->sh_info = translate_link(ofl, osp, 4074 shdr->sh_info, MSG_INTL(MSG_FIL_INVSHINFO)); 4075 4076 if (!(flags & FLG_OF_RELOBJ) && 4077 (phdr->p_type == PT_LOAD)) { 4078 if (hshdr) 4079 vaddr += (shdr->sh_offset - 4080 hshdr->sh_offset); 4081 4082 shdr->sh_addr = vaddr; 4083 hshdr = shdr; 4084 } 4085 4086 DBG_CALL(Dbg_seg_os(ofl, osp, secndx)); 4087 secndx++; 4088 } 4089 4090 /* 4091 * Establish the virtual address of the end of the last section 4092 * in this segment so that the next segments offset can be 4093 * calculated from this. 4094 */ 4095 if (hshdr) 4096 vaddr += hshdr->sh_size; 4097 4098 /* 4099 * Output sections for this segment complete. Adjust the 4100 * virtual offset for the last sections size, and make sure we 4101 * haven't exceeded any maximum segment length specification. 4102 */ 4103 if ((sgp->sg_length != 0) && (sgp->sg_length < phdr->p_memsz)) { 4104 ld_eprintf(ofl, ERR_FATAL, MSG_INTL(MSG_UPD_LARGSIZE), 4105 ofl->ofl_name, sgp->sg_name, 4106 EC_XWORD(phdr->p_memsz), EC_XWORD(sgp->sg_length)); 4107 return (S_ERROR); 4108 } 4109 4110 if (phdr->p_type == PT_NOTE) { 4111 phdr->p_vaddr = 0; 4112 phdr->p_paddr = 0; 4113 phdr->p_align = 0; 4114 phdr->p_memsz = 0; 4115 } 4116 4117 if ((phdr->p_type != PT_NULL) && !(flags & FLG_OF_RELOBJ)) 4118 ofl->ofl_phdr[phdrndx++] = *phdr; 4119 } 4120 4121 /* 4122 * Update any new output sections. When building the initial output 4123 * image, a number of sections were created but left uninitialized (eg. 4124 * .dynsym, .dynstr, .symtab, .symtab, etc.). Here we update these 4125 * sections with the appropriate data. Other sections may still be 4126 * modified via reloc_process(). 4127 * 4128 * Copy the interpreter name into the .interp section. 4129 */ 4130 if (ofl->ofl_interp) 4131 (void) strcpy((char *)ofl->ofl_osinterp->os_outdata->d_buf, 4132 ofl->ofl_interp); 4133 4134 /* 4135 * Update the .shstrtab, .strtab and .dynstr sections. 4136 */ 4137 update_ostrtab(ofl->ofl_osshstrtab, ofl->ofl_shdrsttab, 0); 4138 update_ostrtab(ofl->ofl_osstrtab, ofl->ofl_strtab, 0); 4139 update_ostrtab(ofl->ofl_osdynstr, ofl->ofl_dynstrtab, DYNSTR_EXTRA_PAD); 4140 4141 /* 4142 * Build any output symbol tables, the symbols information is copied 4143 * and updated into the new output image. 4144 */ 4145 if ((etext = update_osym(ofl)) == (Addr)S_ERROR) 4146 return (S_ERROR); 4147 4148 /* 4149 * If we have an PT_INTERP phdr, update it now from the associated 4150 * section information. 4151 */ 4152 if (intpsgp) { 4153 Phdr *phdr = &(intpsgp->sg_phdr); 4154 Shdr *shdr = ofl->ofl_osinterp->os_shdr; 4155 4156 phdr->p_vaddr = shdr->sh_addr; 4157 phdr->p_offset = shdr->sh_offset; 4158 phdr->p_memsz = phdr->p_filesz = shdr->sh_size; 4159 phdr->p_flags = PF_R; 4160 4161 DBG_CALL(Dbg_seg_entry(ofl, intpsndx, intpsgp)); 4162 ofl->ofl_phdr[intppndx] = *phdr; 4163 } 4164 4165 /* 4166 * If we have a PT_SUNWDTRACE phdr, update it now with the address of 4167 * the symbol. It's only now been updated via update_sym(). 4168 */ 4169 if (dtracesgp) { 4170 Phdr *aphdr, *phdr = &(dtracesgp->sg_phdr); 4171 Sym_desc *sdp = ofl->ofl_dtracesym; 4172 4173 phdr->p_vaddr = sdp->sd_sym->st_value; 4174 phdr->p_memsz = sdp->sd_sym->st_size; 4175 4176 /* 4177 * Take permissions from the segment that the symbol is 4178 * associated with. 4179 */ 4180 aphdr = &sdp->sd_isc->is_osdesc->os_sgdesc->sg_phdr; 4181 assert(aphdr); 4182 phdr->p_flags = aphdr->p_flags; 4183 4184 DBG_CALL(Dbg_seg_entry(ofl, dtracesndx, dtracesgp)); 4185 ofl->ofl_phdr[dtracepndx] = *phdr; 4186 } 4187 4188 /* 4189 * If we have a PT_SUNWCAP phdr, update it now from the associated 4190 * section information. 4191 */ 4192 if (capsgp) { 4193 Phdr *phdr = &(capsgp->sg_phdr); 4194 Shdr *shdr = ofl->ofl_oscap->os_shdr; 4195 4196 phdr->p_vaddr = shdr->sh_addr; 4197 phdr->p_offset = shdr->sh_offset; 4198 phdr->p_memsz = phdr->p_filesz = shdr->sh_size; 4199 phdr->p_flags = PF_R; 4200 4201 DBG_CALL(Dbg_seg_entry(ofl, capsndx, capsgp)); 4202 ofl->ofl_phdr[cappndx] = *phdr; 4203 } 4204 4205 /* 4206 * Update the GROUP sections. 4207 */ 4208 if (update_ogroup(ofl) == S_ERROR) 4209 return (S_ERROR); 4210 4211 /* 4212 * Update Move Table. 4213 */ 4214 if (ofl->ofl_osmove || ofl->ofl_isparexpn) 4215 update_move(ofl); 4216 4217 /* 4218 * Build any output headers, version information, dynamic structure and 4219 * syminfo structure. 4220 */ 4221 if (update_oehdr(ofl) == S_ERROR) 4222 return (S_ERROR); 4223 if (!(flags & FLG_OF_NOVERSEC)) { 4224 if ((flags & FLG_OF_VERDEF) && 4225 (update_overdef(ofl) == S_ERROR)) 4226 return (S_ERROR); 4227 if ((flags & FLG_OF_VERNEED) && 4228 (update_overneed(ofl) == S_ERROR)) 4229 return (S_ERROR); 4230 if (flags & (FLG_OF_VERNEED | FLG_OF_VERDEF)) 4231 update_oversym(ofl); 4232 } 4233 if (flags & FLG_OF_DYNAMIC) { 4234 if (update_odynamic(ofl) == S_ERROR) 4235 return (S_ERROR); 4236 } 4237 if (ofl->ofl_ossyminfo) { 4238 if (update_osyminfo(ofl) == S_ERROR) 4239 return (S_ERROR); 4240 } 4241 4242 /* 4243 * Update capabilities information if required. 4244 */ 4245 if (ofl->ofl_oscap) 4246 update_oscap(ofl); 4247 if (ofl->ofl_oscapinfo) 4248 update_oscapinfo(ofl); 4249 4250 /* 4251 * Sanity test: the first and last data byte of a string table 4252 * must be NULL. 4253 */ 4254 assert((ofl->ofl_osshstrtab == NULL) || 4255 (*((char *)ofl->ofl_osshstrtab->os_outdata->d_buf) == '\0')); 4256 assert((ofl->ofl_osshstrtab == NULL) || 4257 (*(((char *)ofl->ofl_osshstrtab->os_outdata->d_buf) + 4258 ofl->ofl_osshstrtab->os_outdata->d_size - 1) == '\0')); 4259 4260 assert((ofl->ofl_osstrtab == NULL) || 4261 (*((char *)ofl->ofl_osstrtab->os_outdata->d_buf) == '\0')); 4262 assert((ofl->ofl_osstrtab == NULL) || 4263 (*(((char *)ofl->ofl_osstrtab->os_outdata->d_buf) + 4264 ofl->ofl_osstrtab->os_outdata->d_size - 1) == '\0')); 4265 4266 assert((ofl->ofl_osdynstr == NULL) || 4267 (*((char *)ofl->ofl_osdynstr->os_outdata->d_buf) == '\0')); 4268 assert((ofl->ofl_osdynstr == NULL) || 4269 (*(((char *)ofl->ofl_osdynstr->os_outdata->d_buf) + 4270 ofl->ofl_osdynstr->os_outdata->d_size - DYNSTR_EXTRA_PAD - 1) == 4271 '\0')); 4272 4273 /* 4274 * Emit Strtab diagnostics. 4275 */ 4276 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osshstrtab, 4277 ofl->ofl_shdrsttab)); 4278 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osstrtab, 4279 ofl->ofl_strtab)); 4280 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osdynstr, 4281 ofl->ofl_dynstrtab)); 4282 4283 /* 4284 * Initialize the section headers string table index within the elf 4285 * header. 4286 */ 4287 /* LINTED */ 4288 if ((shscnndx = elf_ndxscn(ofl->ofl_osshstrtab->os_scn)) < 4289 SHN_LORESERVE) { 4290 ofl->ofl_nehdr->e_shstrndx = 4291 /* LINTED */ 4292 (Half)shscnndx; 4293 } else { 4294 /* 4295 * If the STRTAB section index doesn't fit into 4296 * e_shstrndx, then we store it in 'shdr[0].st_link'. 4297 */ 4298 Elf_Scn *scn; 4299 Shdr *shdr0; 4300 4301 if ((scn = elf_getscn(ofl->ofl_elf, 0)) == NULL) { 4302 ld_eprintf(ofl, ERR_ELF, MSG_INTL(MSG_ELF_GETSCN), 4303 ofl->ofl_name); 4304 return (S_ERROR); 4305 } 4306 if ((shdr0 = elf_getshdr(scn)) == NULL) { 4307 ld_eprintf(ofl, ERR_ELF, MSG_INTL(MSG_ELF_GETSHDR), 4308 ofl->ofl_name); 4309 return (S_ERROR); 4310 } 4311 ofl->ofl_nehdr->e_shstrndx = SHN_XINDEX; 4312 shdr0->sh_link = shscnndx; 4313 } 4314 4315 return ((uintptr_t)etext); 4316 } 4317