1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1988 AT&T 24 * All Rights Reserved 25 * 26 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 /* 31 * Update the new output file image, perform virtual address, offset and 32 * displacement calculations on the program headers and sections headers, 33 * and generate any new output section information. 34 */ 35 36 #define ELF_TARGET_AMD64 37 38 #include <stdio.h> 39 #include <string.h> 40 #include <unistd.h> 41 #include <debug.h> 42 #include "msg.h" 43 #include "_libld.h" 44 45 /* 46 * Comparison routine used by qsort() for sorting of the global symbol list 47 * based off of the hashbuckets the symbol will eventually be deposited in. 48 */ 49 static int 50 sym_hash_compare(Sym_s_list * s1, Sym_s_list * s2) 51 { 52 return (s1->sl_hval - s2->sl_hval); 53 } 54 55 /* 56 * Comparison routine used by qsort() for sorting of dyn[sym|tls]sort section 57 * indices based on the address of the symbols they reference. The 58 * use of the global dynsort_compare_syms variable is needed because 59 * we need to examine the symbols the indices reference. It is safe, because 60 * the linker is single threaded. 61 */ 62 Sym *dynsort_compare_syms; 63 64 static int 65 dynsort_compare(const void *idx1, const void *idx2) 66 { 67 Sym *s1 = dynsort_compare_syms + *((const Word *) idx1); 68 Sym *s2 = dynsort_compare_syms + *((const Word *) idx2); 69 70 /* 71 * Note: the logical computation for this is 72 * (st_value1 - st_value2) 73 * However, that is only correct if the address type is smaller 74 * than a pointer. Writing it this way makes it immune to the 75 * class (32 or 64-bit) of the linker. 76 */ 77 return ((s1->st_value < s2->st_value) ? -1 : 78 (s1->st_value > s2->st_value)); 79 } 80 81 /* 82 * Scan the sorted symbols, and issue warnings if there are any duplicate 83 * values in the list. We only do this if -zverbose is set, or we are 84 * running with LD_DEBUG defined 85 * 86 * entry: 87 * ofl - Output file descriptor 88 * ldynsym - Pointer to start of .SUNW_ldynsym section that the 89 * sort section indexes reference. 90 * symsort - Pointer to start of .SUNW_dynsymsort or .SUNW_dyntlssort 91 * section. 92 * n - # of indices in symsort array 93 * secname - Name of the symsort section. 94 * 95 * exit: 96 * If the symsort section contains indexes to more than one 97 * symbol with the same address value, a warning is issued. 98 */ 99 static void 100 dynsort_dupwarn(Ofl_desc *ofl, Sym *ldynsym, const char *str, 101 Word *symsort, Word n, const char *secname) 102 { 103 int zverbose = (ofl->ofl_flags & FLG_OF_VERBOSE) != 0; 104 Word ndx, cmp_ndx; 105 Addr addr, cmp_addr; 106 107 /* Nothing to do if -zverbose or LD_DEBUG are not active */ 108 if (!(zverbose || DBG_ENABLED)) 109 return; 110 111 cmp_ndx = 0; 112 cmp_addr = ldynsym[symsort[cmp_ndx]].st_value; 113 for (ndx = 1; ndx < n; ndx++) { 114 addr = ldynsym[symsort[ndx]].st_value; 115 if (cmp_addr == addr) { 116 if (zverbose) 117 eprintf(ofl->ofl_lml, ERR_WARNING, 118 MSG_INTL(MSG_SYM_DUPSORTADDR), secname, 119 str + ldynsym[symsort[cmp_ndx]].st_name, 120 str + ldynsym[symsort[ndx]].st_name, 121 EC_ADDR(addr)); 122 DBG_CALL(Dbg_syms_dup_sort_addr(ofl->ofl_lml, secname, 123 str + ldynsym[symsort[cmp_ndx]].st_name, 124 str + ldynsym[symsort[ndx]].st_name, 125 EC_ADDR(addr))); 126 } else { /* Not a dup. Move reference up */ 127 cmp_ndx = ndx; 128 cmp_addr = addr; 129 } 130 } 131 } 132 133 134 /* 135 * Build and update any output symbol tables. Here we work on all the symbol 136 * tables at once to reduce the duplication of symbol and string manipulation. 137 * Symbols and their associated strings are copied from the read-only input 138 * file images to the output image and their values and index's updated in the 139 * output image. 140 */ 141 static Addr 142 update_osym(Ofl_desc *ofl) 143 { 144 /* 145 * There are several places in this function where we wish 146 * to insert a symbol index to the combined .SUNW_ldynsym/.dynsym 147 * symbol table into one of the two sort sections (.SUNW_dynsymsort 148 * or .SUNW_dyntlssort), if that symbol has the right attributes. 149 * This macro is used to generate the necessary code from a single 150 * specification. 151 * 152 * entry: 153 * _sdp, _sym, _type - As per DYNSORT_COUNT. See _libld.h 154 * _sym_ndx - Index that _sym will have in the combined 155 * .SUNW_ldynsym/.dynsym symbol table. 156 */ 157 #define ADD_TO_DYNSORT(_sdp, _sym, _type, _sym_ndx) \ 158 { \ 159 Word *_dynsort_arr, *_dynsort_ndx; \ 160 \ 161 if (dynsymsort_symtype[_type]) { \ 162 _dynsort_arr = dynsymsort; \ 163 _dynsort_ndx = &dynsymsort_ndx; \ 164 } else if (_type == STT_TLS) { \ 165 _dynsort_arr = dyntlssort; \ 166 _dynsort_ndx = &dyntlssort_ndx; \ 167 } else { \ 168 _dynsort_arr = NULL; \ 169 } \ 170 if ((_dynsort_arr != NULL) && DYNSORT_TEST_ATTR(_sdp, _sym)) \ 171 _dynsort_arr[(*_dynsort_ndx)++] = _sym_ndx; \ 172 } 173 174 175 Sym_desc *sdp; 176 Sym_avlnode *sav; 177 Sg_desc *sgp, *tsgp = NULL, *dsgp = NULL, *esgp = NULL; 178 Os_desc *osp, *iosp = NULL, *fosp = NULL; 179 Is_desc *isc; 180 Ifl_desc *ifl; 181 Word bssndx, etext_ndx, edata_ndx = 0, end_ndx, start_ndx; 182 Word end_abs = 0, etext_abs = 0, edata_abs; 183 Word tlsbssndx = 0, parexpnndx; 184 #if defined(_ELF64) 185 Word lbssndx = 0; 186 Addr lbssaddr = 0; 187 #endif 188 Addr bssaddr, etext = 0, edata = 0, end = 0, start = 0; 189 Addr tlsbssaddr = 0; 190 Addr parexpnbase, parexpnaddr; 191 int start_set = 0; 192 Sym _sym = {0}, *sym, *symtab = NULL; 193 Sym *dynsym = NULL, *ldynsym = NULL; 194 Word symtab_ndx = 0; /* index into .symtab */ 195 Word symtab_gbl_bndx; /* .symtab ndx 1st global */ 196 Word ldynsym_ndx = 0; /* index into .SUNW_ldynsym */ 197 Word dynsym_ndx = 0; /* index into .dynsym */ 198 Word scopesym_ndx = 0; /* index into scoped symbols */ 199 Word scopesym_bndx = 0; /* .symtab ndx 1st scoped sym */ 200 Word ldynscopesym_ndx = 0; /* index to ldynsym scoped syms */ 201 Word *dynsymsort = NULL; /* SUNW_dynsymsort index vector */ 202 Word *dyntlssort = NULL; /* SUNW_dyntlssort index vector */ 203 Word dynsymsort_ndx; /* index dynsymsort array */ 204 Word dyntlssort_ndx; /* index dyntlssort array */ 205 Word *symndx; /* Symbol index (for relocation use) */ 206 Word *symshndx = NULL; /* .symtab_shndx table */ 207 Word *dynshndx = NULL; /* .dynsym_shndx table */ 208 Word *ldynshndx = NULL; /* .SUNW_ldynsym_shndx table */ 209 Word ldynsym_cnt = NULL; /* # of items in .SUNW_ldynsym */ 210 Str_tbl *shstrtab; 211 Str_tbl *strtab; 212 Str_tbl *dynstr; 213 Word *hashtab; /* hash table pointer */ 214 Word *hashbkt; /* hash table bucket pointer */ 215 Word *hashchain; /* hash table chain pointer */ 216 Word hashval; /* value of hash function */ 217 Wk_desc *wkp; 218 Alist *weak = NULL; 219 ofl_flag_t flags = ofl->ofl_flags; 220 Word dtflags_1 = ofl->ofl_dtflags_1; 221 Versym *versym; 222 Gottable *gottable; /* used for display got debugging */ 223 /* information */ 224 Syminfo *syminfo; 225 Sym_s_list *sorted_syms; /* table to hold sorted symbols */ 226 Word ssndx; /* global index into sorted_syms */ 227 Word scndx; /* scoped index into sorted_syms */ 228 size_t stoff; /* string offset */ 229 Aliste idx1; 230 231 /* 232 * Initialize pointers to the symbol table entries and the symbol 233 * table strings. Skip the first symbol entry and the first string 234 * table byte. Note that if we are not generating any output symbol 235 * tables we must still generate and update an internal copies so 236 * that the relocation phase has the correct information. 237 */ 238 if (!(flags & FLG_OF_STRIP) || (flags & FLG_OF_RELOBJ) || 239 ((flags & FLG_OF_STATIC) && ofl->ofl_osversym)) { 240 symtab = (Sym *)ofl->ofl_ossymtab->os_outdata->d_buf; 241 symtab[symtab_ndx++] = _sym; 242 if (ofl->ofl_ossymshndx) 243 symshndx = 244 (Word *)ofl->ofl_ossymshndx->os_outdata->d_buf; 245 } 246 if (OFL_ALLOW_DYNSYM(ofl)) { 247 dynsym = (Sym *)ofl->ofl_osdynsym->os_outdata->d_buf; 248 dynsym[dynsym_ndx++] = _sym; 249 /* 250 * If we are also constructing a .SUNW_ldynsym section 251 * to contain local function symbols, then set it up too. 252 */ 253 if (ofl->ofl_osldynsym) { 254 ldynsym = (Sym *)ofl->ofl_osldynsym->os_outdata->d_buf; 255 ldynsym[ldynsym_ndx++] = _sym; 256 ldynsym_cnt = 1 + ofl->ofl_dynlocscnt + 257 ofl->ofl_dynscopecnt; 258 259 /* 260 * If there is a SUNW_ldynsym, then there may also 261 * be a .SUNW_dynsymsort and/or .SUNW_dyntlssort 262 * sections, used to collect indices of function 263 * and data symbols sorted by address order. 264 */ 265 if (ofl->ofl_osdynsymsort) { /* .SUNW_dynsymsort */ 266 dynsymsort = (Word *) 267 ofl->ofl_osdynsymsort->os_outdata->d_buf; 268 dynsymsort_ndx = 0; 269 } 270 if (ofl->ofl_osdyntlssort) { /* .SUNW_dyntlssort */ 271 dyntlssort = (Word *) 272 ofl->ofl_osdyntlssort->os_outdata->d_buf; 273 dyntlssort_ndx = 0; 274 } 275 } 276 277 /* 278 * Initialize the hash table. 279 */ 280 hashtab = (Word *)(ofl->ofl_oshash->os_outdata->d_buf); 281 hashbkt = &hashtab[2]; 282 hashchain = &hashtab[2 + ofl->ofl_hashbkts]; 283 hashtab[0] = ofl->ofl_hashbkts; 284 hashtab[1] = ofl->ofl_dynshdrcnt + ofl->ofl_globcnt + 285 ofl->ofl_lregsymcnt + 1; 286 if (ofl->ofl_osdynshndx) 287 dynshndx = 288 (Word *)ofl->ofl_osdynshndx->os_outdata->d_buf; 289 if (ofl->ofl_osldynshndx) 290 ldynshndx = 291 (Word *)ofl->ofl_osldynshndx->os_outdata->d_buf; 292 } 293 294 /* 295 * symndx is the symbol index to be used for relocation processing. It 296 * points to the relevant symtab's (.dynsym or .symtab) symbol ndx. 297 */ 298 if (dynsym) 299 symndx = &dynsym_ndx; 300 else 301 symndx = &symtab_ndx; 302 303 /* 304 * If we have version definitions initialize the version symbol index 305 * table. There is one entry for each symbol which contains the symbols 306 * version index. 307 */ 308 if (!(flags & FLG_OF_NOVERSEC) && 309 (flags & (FLG_OF_VERNEED | FLG_OF_VERDEF))) { 310 versym = (Versym *)ofl->ofl_osversym->os_outdata->d_buf; 311 versym[0] = 0; 312 } else 313 versym = 0; 314 315 /* 316 * If syminfo section exists be prepared to fill it in. 317 */ 318 if (ofl->ofl_ossyminfo) { 319 syminfo = ofl->ofl_ossyminfo->os_outdata->d_buf; 320 syminfo[0].si_flags = SYMINFO_CURRENT; 321 } else 322 syminfo = 0; 323 324 /* 325 * Setup our string tables. 326 */ 327 shstrtab = ofl->ofl_shdrsttab; 328 strtab = ofl->ofl_strtab; 329 dynstr = ofl->ofl_dynstrtab; 330 331 DBG_CALL(Dbg_syms_sec_title(ofl->ofl_lml)); 332 333 /* 334 * Put output file name to the first .symtab and .SUNW_ldynsym symbol. 335 */ 336 if (symtab) { 337 (void) st_setstring(strtab, ofl->ofl_name, &stoff); 338 sym = &symtab[symtab_ndx++]; 339 /* LINTED */ 340 sym->st_name = stoff; 341 sym->st_value = 0; 342 sym->st_size = 0; 343 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_FILE); 344 sym->st_other = 0; 345 sym->st_shndx = SHN_ABS; 346 347 if (versym && !dynsym) 348 versym[1] = 0; 349 } 350 if (ldynsym) { 351 (void) st_setstring(dynstr, ofl->ofl_name, &stoff); 352 sym = &ldynsym[ldynsym_ndx]; 353 /* LINTED */ 354 sym->st_name = stoff; 355 sym->st_value = 0; 356 sym->st_size = 0; 357 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_FILE); 358 sym->st_other = 0; 359 sym->st_shndx = SHN_ABS; 360 361 /* Scoped symbols get filled in global loop below */ 362 ldynscopesym_ndx = ldynsym_ndx + 1; 363 ldynsym_ndx += ofl->ofl_dynscopecnt; 364 } 365 366 /* 367 * If we are to display GOT summary information, then allocate 368 * the buffer to 'cache' the GOT symbols into now. 369 */ 370 if (DBG_ENABLED) { 371 if ((ofl->ofl_gottable = gottable = 372 libld_calloc(ofl->ofl_gotcnt, sizeof (Gottable))) == NULL) 373 return ((Addr)S_ERROR); 374 } 375 376 /* 377 * Traverse the program headers. Determine the last executable segment 378 * and the last data segment so that we can update etext and edata. If 379 * we have empty segments (reservations) record them for setting _end. 380 */ 381 for (APLIST_TRAVERSE(ofl->ofl_segs, idx1, sgp)) { 382 Phdr *phd = &(sgp->sg_phdr); 383 Os_desc *osp; 384 Aliste idx2; 385 386 if (phd->p_type == PT_LOAD) { 387 if (sgp->sg_osdescs != NULL) { 388 Word _flags = phd->p_flags & (PF_W | PF_R); 389 390 if (_flags == PF_R) 391 tsgp = sgp; 392 else if (_flags == (PF_W | PF_R)) 393 dsgp = sgp; 394 } else if (sgp->sg_flags & FLG_SG_EMPTY) 395 esgp = sgp; 396 } 397 398 /* 399 * Generate a section symbol for each output section. 400 */ 401 for (APLIST_TRAVERSE(sgp->sg_osdescs, idx2, osp)) { 402 Word sectndx; 403 404 sym = &_sym; 405 sym->st_value = osp->os_shdr->sh_addr; 406 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_SECTION); 407 /* LINTED */ 408 sectndx = elf_ndxscn(osp->os_scn); 409 410 if (symtab) { 411 if (sectndx >= SHN_LORESERVE) { 412 symshndx[symtab_ndx] = sectndx; 413 sym->st_shndx = SHN_XINDEX; 414 } else { 415 /* LINTED */ 416 sym->st_shndx = (Half)sectndx; 417 } 418 symtab[symtab_ndx++] = *sym; 419 } 420 421 if (dynsym && (osp->os_flags & FLG_OS_OUTREL)) 422 dynsym[dynsym_ndx++] = *sym; 423 424 if ((dynsym == NULL) || 425 (osp->os_flags & FLG_OS_OUTREL)) { 426 if (versym) 427 versym[*symndx - 1] = 0; 428 osp->os_identndx = *symndx - 1; 429 DBG_CALL(Dbg_syms_sec_entry(ofl->ofl_lml, 430 osp->os_identndx, sgp, osp)); 431 } 432 433 /* 434 * Generate the .shstrtab for this section. 435 */ 436 (void) st_setstring(shstrtab, osp->os_name, &stoff); 437 osp->os_shdr->sh_name = (Word)stoff; 438 439 /* 440 * Find the section index for our special symbols. 441 */ 442 if (sgp == tsgp) { 443 /* LINTED */ 444 etext_ndx = elf_ndxscn(osp->os_scn); 445 } else if (dsgp == sgp) { 446 if (osp->os_shdr->sh_type != SHT_NOBITS) { 447 /* LINTED */ 448 edata_ndx = elf_ndxscn(osp->os_scn); 449 } 450 } 451 452 if (start_set == 0) { 453 start = sgp->sg_phdr.p_vaddr; 454 /* LINTED */ 455 start_ndx = elf_ndxscn(osp->os_scn); 456 start_set++; 457 } 458 459 /* 460 * While we're here, determine whether a .init or .fini 461 * section exist. 462 */ 463 if ((iosp == NULL) && (strcmp(osp->os_name, 464 MSG_ORIG(MSG_SCN_INIT)) == 0)) 465 iosp = osp; 466 if ((fosp == NULL) && (strcmp(osp->os_name, 467 MSG_ORIG(MSG_SCN_FINI)) == 0)) 468 fosp = osp; 469 } 470 } 471 472 /* 473 * Add local register symbols to the .dynsym. These are required as 474 * DT_REGISTER .dynamic entries must have a symbol to reference. 475 */ 476 if (ofl->ofl_regsyms && dynsym) { 477 int ndx; 478 479 for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 480 Sym_desc *rsdp; 481 482 if ((rsdp = ofl->ofl_regsyms[ndx]) == NULL) 483 continue; 484 485 if (((rsdp->sd_flags1 & FLG_SY1_HIDDEN) == 0) && 486 (ELF_ST_BIND(rsdp->sd_sym->st_info) != STB_LOCAL)) 487 continue; 488 489 dynsym[dynsym_ndx] = *(rsdp->sd_sym); 490 rsdp->sd_symndx = *symndx; 491 492 if (dynsym[dynsym_ndx].st_name) { 493 (void) st_setstring(dynstr, rsdp->sd_name, 494 &stoff); 495 dynsym[dynsym_ndx].st_name = stoff; 496 } 497 dynsym_ndx++; 498 } 499 } 500 501 /* 502 * Having traversed all the output segments, warn the user if the 503 * traditional text or data segments don't exist. Otherwise from these 504 * segments establish the values for `etext', `edata', `end', `END', 505 * and `START'. 506 */ 507 if (!(flags & FLG_OF_RELOBJ)) { 508 Sg_desc *sgp; 509 510 if (tsgp) 511 etext = tsgp->sg_phdr.p_vaddr + tsgp->sg_phdr.p_filesz; 512 else { 513 etext = (Addr)0; 514 etext_ndx = SHN_ABS; 515 etext_abs = 1; 516 if (flags & FLG_OF_VERBOSE) 517 eprintf(ofl->ofl_lml, ERR_WARNING, 518 MSG_INTL(MSG_UPD_NOREADSEG)); 519 } 520 if (dsgp) { 521 edata = dsgp->sg_phdr.p_vaddr + dsgp->sg_phdr.p_filesz; 522 } else { 523 edata = (Addr)0; 524 edata_ndx = SHN_ABS; 525 edata_abs = 1; 526 if (flags & FLG_OF_VERBOSE) 527 eprintf(ofl->ofl_lml, ERR_WARNING, 528 MSG_INTL(MSG_UPD_NORDWRSEG)); 529 } 530 531 if (dsgp == NULL) { 532 if (tsgp) 533 sgp = tsgp; 534 else 535 sgp = 0; 536 } else if (tsgp == NULL) 537 sgp = dsgp; 538 else if (dsgp->sg_phdr.p_vaddr > tsgp->sg_phdr.p_vaddr) 539 sgp = dsgp; 540 else if (dsgp->sg_phdr.p_vaddr < tsgp->sg_phdr.p_vaddr) 541 sgp = tsgp; 542 else { 543 /* 544 * One of the segments must be of zero size. 545 */ 546 if (tsgp->sg_phdr.p_memsz) 547 sgp = tsgp; 548 else 549 sgp = dsgp; 550 } 551 552 if (esgp && (esgp->sg_phdr.p_vaddr > sgp->sg_phdr.p_vaddr)) 553 sgp = esgp; 554 555 if (sgp) { 556 end = sgp->sg_phdr.p_vaddr + sgp->sg_phdr.p_memsz; 557 558 /* 559 * If the last loadable segment is a read-only segment, 560 * then the application which uses the symbol _end to 561 * find the beginning of writable heap area may cause 562 * segmentation violation. We adjust the value of the 563 * _end to skip to the next page boundary. 564 * 565 * 6401812 System interface which returs beginning 566 * heap would be nice. 567 * When the above RFE is implemented, the changes below 568 * could be changed in a better way. 569 */ 570 if ((sgp->sg_phdr.p_flags & PF_W) == 0) 571 end = (Addr)S_ROUND(end, sysconf(_SC_PAGESIZE)); 572 573 /* 574 * If we're dealing with a memory reservation there are 575 * no sections to establish an index for _end, so assign 576 * it as an absolute. 577 */ 578 if (sgp->sg_osdescs != NULL) { 579 /* 580 * Determine the last section for this segment. 581 */ 582 Os_desc *osp = sgp->sg_osdescs->apl_data 583 [sgp->sg_osdescs->apl_nitems - 1]; 584 585 /* LINTED */ 586 end_ndx = elf_ndxscn(osp->os_scn); 587 } else { 588 end_ndx = SHN_ABS; 589 end_abs = 1; 590 } 591 } else { 592 end = (Addr) 0; 593 end_ndx = SHN_ABS; 594 end_abs = 1; 595 eprintf(ofl->ofl_lml, ERR_WARNING, 596 MSG_INTL(MSG_UPD_NOSEG)); 597 } 598 } 599 600 DBG_CALL(Dbg_syms_up_title(ofl->ofl_lml)); 601 602 /* 603 * Initialize the scoped symbol table entry point. This is for all 604 * the global symbols that have been scoped to locals and will be 605 * filled in during global symbol processing so that we don't have 606 * to traverse the globals symbol hash array more than once. 607 */ 608 if (symtab) { 609 scopesym_bndx = symtab_ndx; 610 scopesym_ndx = scopesym_bndx; 611 symtab_ndx += ofl->ofl_scopecnt; 612 } 613 614 /* 615 * If expanding partially expanded symbols under '-z nopartial', 616 * prepare to do that. 617 */ 618 if (ofl->ofl_isparexpn) { 619 osp = ofl->ofl_isparexpn->is_osdesc; 620 parexpnbase = parexpnaddr = (Addr)(osp->os_shdr->sh_addr + 621 ofl->ofl_isparexpn->is_indata->d_off); 622 /* LINTED */ 623 parexpnndx = elf_ndxscn(osp->os_scn); 624 ofl->ofl_parexpnndx = osp->os_identndx; 625 } 626 627 /* 628 * If we are generating a .symtab collect all the local symbols, 629 * assigning a new virtual address or displacement (value). 630 */ 631 for (APLIST_TRAVERSE(ofl->ofl_objs, idx1, ifl)) { 632 Xword lndx, local; 633 634 /* 635 * Check that we have local symbols to process. If the user 636 * has indicated scoping then scan the global symbols also 637 * looking for entries from this file to reduce to locals. 638 */ 639 if ((local = ifl->ifl_locscnt) == 0) 640 continue; 641 642 for (lndx = 1; lndx < local; lndx++) { 643 Gotndx *gnp; 644 uchar_t type; 645 Word *_symshndx; 646 int enter_in_symtab, enter_in_ldynsym; 647 int update_done; 648 649 sdp = ifl->ifl_oldndx[lndx]; 650 sym = sdp->sd_sym; 651 652 /* 653 * Assign a got offset if necessary. 654 */ 655 if ((ld_targ.t_mr.mr_assign_got != NULL) && 656 (*ld_targ.t_mr.mr_assign_got)(ofl, sdp) == S_ERROR) 657 return ((Addr)S_ERROR); 658 659 if (DBG_ENABLED) { 660 Aliste idx2; 661 662 for (ALIST_TRAVERSE(sdp->sd_GOTndxs, 663 idx2, gnp)) { 664 gottable->gt_sym = sdp; 665 gottable->gt_gndx.gn_gotndx = 666 gnp->gn_gotndx; 667 gottable->gt_gndx.gn_addend = 668 gnp->gn_addend; 669 gottable++; 670 } 671 } 672 673 if ((type = ELF_ST_TYPE(sym->st_info)) == STT_SECTION) 674 continue; 675 676 /* 677 * Ignore any symbols that have been marked as invalid 678 * during input processing. Providing these aren't used 679 * for relocation they'll just be dropped from the 680 * output image. 681 */ 682 if (sdp->sd_flags & FLG_SY_INVALID) 683 continue; 684 685 /* 686 * If the section that this symbol was associated 687 * with has been discarded - then we discard 688 * the local symbol along with it. 689 */ 690 if (sdp->sd_flags & FLG_SY_ISDISC) 691 continue; 692 693 /* 694 * If this symbol is from a different file 695 * than the input descriptor we are processing, 696 * treat it as if it has FLG_SY_ISDISC set. 697 * This happens when sloppy_comdat_reloc() 698 * replaces a symbol to a discarded comdat section 699 * with an equivalent symbol from a different 700 * file. We only want to enter such a symbol 701 * once --- as part of the file that actually 702 * supplies it. 703 */ 704 if (ifl != sdp->sd_file) 705 continue; 706 707 708 /* 709 * Generate an output symbol to represent this input 710 * symbol. Even if the symbol table is to be stripped 711 * we still need to update any local symbols that are 712 * used during relocation. 713 */ 714 enter_in_symtab = symtab && 715 (!(ofl->ofl_flags & FLG_OF_REDLSYM) || 716 sdp->sd_move); 717 enter_in_ldynsym = ldynsym && sdp->sd_name && 718 ldynsym_symtype[type] && 719 !(ofl->ofl_flags & FLG_OF_REDLSYM); 720 _symshndx = NULL; 721 722 if (enter_in_symtab) { 723 if (!dynsym) 724 sdp->sd_symndx = *symndx; 725 symtab[symtab_ndx] = *sym; 726 /* 727 * Provided this isn't an unnamed register 728 * symbol, update its name. 729 */ 730 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 731 symtab[symtab_ndx].st_name) { 732 (void) st_setstring(strtab, 733 sdp->sd_name, &stoff); 734 symtab[symtab_ndx].st_name = stoff; 735 } 736 sdp->sd_flags &= ~FLG_SY_CLEAN; 737 if (symshndx) 738 _symshndx = &symshndx[symtab_ndx]; 739 sdp->sd_sym = sym = &symtab[symtab_ndx++]; 740 741 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 742 (sym->st_shndx == SHN_ABS) && 743 !enter_in_ldynsym) 744 continue; 745 } else if (enter_in_ldynsym) { 746 /* 747 * Not using symtab, but we do have ldynsym 748 * available. 749 */ 750 ldynsym[ldynsym_ndx] = *sym; 751 (void) st_setstring(dynstr, sdp->sd_name, 752 &stoff); 753 ldynsym[ldynsym_ndx].st_name = stoff; 754 755 sdp->sd_flags &= ~FLG_SY_CLEAN; 756 if (ldynshndx) 757 _symshndx = &ldynshndx[ldynsym_ndx]; 758 sdp->sd_sym = sym = &ldynsym[ldynsym_ndx]; 759 /* Add it to sort section if it qualifies */ 760 ADD_TO_DYNSORT(sdp, sym, type, ldynsym_ndx); 761 ldynsym_ndx++; 762 } else { /* Not using symtab or ldynsym */ 763 /* 764 * If this symbol requires modifying to provide 765 * for a relocation or move table update, make 766 * a copy of it. 767 */ 768 if (!(sdp->sd_flags & FLG_SY_UPREQD) && 769 !(sdp->sd_move)) 770 continue; 771 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 772 (sym->st_shndx == SHN_ABS)) 773 continue; 774 775 if (ld_sym_copy(sdp) == S_ERROR) 776 return ((Addr)S_ERROR); 777 sym = sdp->sd_sym; 778 } 779 780 /* 781 * Update the symbols contents if necessary. 782 */ 783 update_done = 0; 784 if (type == STT_FILE) { 785 sdp->sd_shndx = sym->st_shndx = SHN_ABS; 786 sdp->sd_flags |= FLG_SY_SPECSEC; 787 update_done = 1; 788 } 789 790 /* 791 * If we are expanding the locally bound partially 792 * initialized symbols, then update the address here. 793 */ 794 if (ofl->ofl_isparexpn && 795 (sdp->sd_flags & FLG_SY_PAREXPN) && !update_done) { 796 sym->st_shndx = parexpnndx; 797 sdp->sd_isc = ofl->ofl_isparexpn; 798 sym->st_value = parexpnaddr; 799 parexpnaddr += sym->st_size; 800 if ((flags & FLG_OF_RELOBJ) == 0) 801 sym->st_value -= parexpnbase; 802 } 803 804 /* 805 * If this isn't an UNDEF symbol (ie. an input section 806 * is associated), update the symbols value and index. 807 */ 808 if (((isc = sdp->sd_isc) != 0) && !update_done) { 809 Word sectndx; 810 811 osp = isc->is_osdesc; 812 /* LINTED */ 813 sym->st_value += 814 (Off)_elf_getxoff(isc->is_indata); 815 if (!(flags & FLG_OF_RELOBJ)) { 816 sym->st_value += osp->os_shdr->sh_addr; 817 /* 818 * TLS symbols are relative to 819 * the TLS segment. 820 */ 821 if ((type == STT_TLS) && 822 (ofl->ofl_tlsphdr)) { 823 sym->st_value -= 824 ofl->ofl_tlsphdr->p_vaddr; 825 } 826 } 827 /* LINTED */ 828 if ((sdp->sd_shndx = sectndx = 829 elf_ndxscn(osp->os_scn)) >= SHN_LORESERVE) { 830 if (_symshndx) { 831 *_symshndx = sectndx; 832 } 833 sym->st_shndx = SHN_XINDEX; 834 } else { 835 /* LINTED */ 836 sym->st_shndx = sectndx; 837 } 838 } 839 840 /* 841 * If entering the symbol in both the symtab and the 842 * ldynsym, then the one in symtab needs to be 843 * copied to ldynsym. If it is only in the ldynsym, 844 * then the code above already set it up and we have 845 * nothing more to do here. 846 */ 847 if (enter_in_symtab && enter_in_ldynsym) { 848 ldynsym[ldynsym_ndx] = *sym; 849 (void) st_setstring(dynstr, sdp->sd_name, 850 &stoff); 851 ldynsym[ldynsym_ndx].st_name = stoff; 852 853 if (_symshndx && ldynshndx) 854 ldynshndx[ldynsym_ndx] = *_symshndx; 855 856 /* Add it to sort section if it qualifies */ 857 ADD_TO_DYNSORT(sdp, sym, type, ldynsym_ndx); 858 859 ldynsym_ndx++; 860 } 861 } 862 } 863 symtab_gbl_bndx = symtab_ndx; /* .symtab index of 1st global entry */ 864 865 /* 866 * Two special symbols are `_init' and `_fini'. If these are supplied 867 * by crti.o then they are used to represent the total concatenation of 868 * the `.init' and `.fini' sections. 869 * 870 * First, determine whether any .init or .fini sections exist. If these 871 * sections exist when a dynamic object is being built, but no `_init' 872 * or `_fini' symbols are found, then the user is probably building this 873 * object directly from ld(1) rather than using a compiler driver that 874 * provides the symbols via crt's. 875 * 876 * If the .init or .fini section exist, and their associated symbols, 877 * determine the size of the sections and updated the symbols value 878 * accordingly. 879 */ 880 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_INIT_U), SYM_NOHASH, 0, 881 ofl)) != NULL) && (sdp->sd_ref == REF_REL_NEED) && sdp->sd_isc && 882 (sdp->sd_isc->is_osdesc == iosp)) { 883 if (ld_sym_copy(sdp) == S_ERROR) 884 return ((Addr)S_ERROR); 885 sdp->sd_sym->st_size = sdp->sd_isc->is_osdesc->os_shdr->sh_size; 886 887 } else if (iosp && !(flags & FLG_OF_RELOBJ)) { 888 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_SYM_NOCRT), 889 MSG_ORIG(MSG_SYM_INIT_U), MSG_ORIG(MSG_SCN_INIT)); 890 } 891 892 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_FINI_U), SYM_NOHASH, 0, 893 ofl)) != NULL) && (sdp->sd_ref == REF_REL_NEED) && sdp->sd_isc && 894 (sdp->sd_isc->is_osdesc == fosp)) { 895 if (ld_sym_copy(sdp) == S_ERROR) 896 return ((Addr)S_ERROR); 897 sdp->sd_sym->st_size = sdp->sd_isc->is_osdesc->os_shdr->sh_size; 898 899 } else if (fosp && !(flags & FLG_OF_RELOBJ)) { 900 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_SYM_NOCRT), 901 MSG_ORIG(MSG_SYM_FINI_U), MSG_ORIG(MSG_SCN_FINI)); 902 } 903 904 /* 905 * Assign .bss information for use with updating COMMON symbols. 906 */ 907 if (ofl->ofl_isbss) { 908 isc = ofl->ofl_isbss; 909 osp = isc->is_osdesc; 910 911 bssaddr = osp->os_shdr->sh_addr + 912 (Off)_elf_getxoff(isc->is_indata); 913 /* LINTED */ 914 bssndx = elf_ndxscn(osp->os_scn); 915 } 916 917 #if defined(_ELF64) 918 /* 919 * For amd64 target, assign .lbss information for use 920 * with updating LCOMMON symbols. 921 */ 922 if ((ld_targ.t_m.m_mach == EM_AMD64) && ofl->ofl_islbss) { 923 osp = ofl->ofl_islbss->is_osdesc; 924 925 lbssaddr = osp->os_shdr->sh_addr + 926 (Off)_elf_getxoff(ofl->ofl_islbss->is_indata); 927 /* LINTED */ 928 lbssndx = elf_ndxscn(osp->os_scn); 929 } 930 #endif 931 932 /* 933 * Assign .tlsbss information for use with updating COMMON symbols. 934 */ 935 if (ofl->ofl_istlsbss) { 936 osp = ofl->ofl_istlsbss->is_osdesc; 937 tlsbssaddr = osp->os_shdr->sh_addr + 938 (Off)_elf_getxoff(ofl->ofl_istlsbss->is_indata); 939 /* LINTED */ 940 tlsbssndx = elf_ndxscn(osp->os_scn); 941 } 942 943 if ((sorted_syms = libld_calloc(ofl->ofl_globcnt + 944 ofl->ofl_elimcnt + ofl->ofl_scopecnt, 945 sizeof (*sorted_syms))) == NULL) 946 return ((Addr)S_ERROR); 947 948 scndx = 0; 949 ssndx = ofl->ofl_scopecnt + ofl->ofl_elimcnt; 950 951 /* 952 * Traverse the internal symbol table updating information and 953 * allocating common. 954 */ 955 for (sav = avl_first(&ofl->ofl_symavl); sav; 956 sav = AVL_NEXT(&ofl->ofl_symavl, sav)) { 957 Sym *symptr; 958 int local; 959 int restore; 960 961 sdp = sav->sav_symdesc; 962 963 /* 964 * Ignore any symbols that have been marked as invalid during 965 * input processing. Providing these aren't used for 966 * relocation, they will be dropped from the output image. 967 */ 968 if (sdp->sd_flags & FLG_SY_INVALID) { 969 DBG_CALL(Dbg_syms_old(ofl, sdp)); 970 DBG_CALL(Dbg_syms_ignore(ofl, sdp)); 971 continue; 972 } 973 974 /* 975 * Only needed symbols are copied to the output symbol table. 976 */ 977 if (sdp->sd_ref == REF_DYN_SEEN) 978 continue; 979 980 if ((sdp->sd_flags1 & FLG_SY1_HIDDEN) && 981 (flags & FLG_OF_PROCRED)) 982 local = 1; 983 else 984 local = 0; 985 986 if (local || (ofl->ofl_hashbkts == 0)) { 987 sorted_syms[scndx++].sl_sdp = sdp; 988 } else { 989 sorted_syms[ssndx].sl_hval = sdp->sd_aux->sa_hash % 990 ofl->ofl_hashbkts; 991 sorted_syms[ssndx].sl_sdp = sdp; 992 ssndx++; 993 } 994 995 /* 996 * Note - expand the COMMON symbols here because an address 997 * must be assigned to them in the same order that space was 998 * calculated in sym_validate(). If this ordering isn't 999 * followed differing alignment requirements can throw us all 1000 * out of whack. 1001 * 1002 * The expanded .bss global symbol is handled here as well. 1003 * 1004 * The actual adding entries into the symbol table still occurs 1005 * below in hashbucket order. 1006 */ 1007 symptr = sdp->sd_sym; 1008 restore = 0; 1009 if ((sdp->sd_flags & FLG_SY_PAREXPN) || 1010 ((sdp->sd_flags & FLG_SY_SPECSEC) && 1011 (sdp->sd_shndx = symptr->st_shndx) == SHN_COMMON)) { 1012 1013 /* 1014 * An expanded symbol goes to a special .data section 1015 * prepared for that purpose (ofl->ofl_isparexpn). 1016 * Assign COMMON allocations to .bss. 1017 * Otherwise leave it as is. 1018 */ 1019 if (sdp->sd_flags & FLG_SY_PAREXPN) { 1020 restore = 1; 1021 sdp->sd_shndx = parexpnndx; 1022 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1023 symptr->st_value = (Xword) S_ROUND( 1024 parexpnaddr, symptr->st_value); 1025 parexpnaddr = symptr->st_value + 1026 symptr->st_size; 1027 sdp->sd_isc = ofl->ofl_isparexpn; 1028 sdp->sd_flags |= FLG_SY_COMMEXP; 1029 1030 } else if (ELF_ST_TYPE(symptr->st_info) != STT_TLS && 1031 (local || !(flags & FLG_OF_RELOBJ))) { 1032 restore = 1; 1033 sdp->sd_shndx = bssndx; 1034 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1035 symptr->st_value = (Xword)S_ROUND(bssaddr, 1036 symptr->st_value); 1037 bssaddr = symptr->st_value + symptr->st_size; 1038 sdp->sd_isc = ofl->ofl_isbss; 1039 sdp->sd_flags |= FLG_SY_COMMEXP; 1040 1041 } else if (ELF_ST_TYPE(symptr->st_info) == STT_TLS && 1042 (local || !(flags & FLG_OF_RELOBJ))) { 1043 restore = 1; 1044 sdp->sd_shndx = tlsbssndx; 1045 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1046 symptr->st_value = (Xword)S_ROUND(tlsbssaddr, 1047 symptr->st_value); 1048 tlsbssaddr = symptr->st_value + symptr->st_size; 1049 sdp->sd_isc = ofl->ofl_istlsbss; 1050 sdp->sd_flags |= FLG_SY_COMMEXP; 1051 /* 1052 * TLS symbols are relative to the TLS segment. 1053 */ 1054 symptr->st_value -= ofl->ofl_tlsphdr->p_vaddr; 1055 } 1056 #if defined(_ELF64) 1057 } else if ((ld_targ.t_m.m_mach == EM_AMD64) && 1058 (sdp->sd_flags & FLG_SY_SPECSEC) && 1059 ((sdp->sd_shndx = symptr->st_shndx) == 1060 SHN_X86_64_LCOMMON) && 1061 ((local || !(flags & FLG_OF_RELOBJ)))) { 1062 restore = 1; 1063 sdp->sd_shndx = lbssndx; 1064 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1065 symptr->st_value = (Xword)S_ROUND(lbssaddr, 1066 symptr->st_value); 1067 lbssaddr = symptr->st_value + symptr->st_size; 1068 sdp->sd_isc = ofl->ofl_islbss; 1069 sdp->sd_flags |= FLG_SY_COMMEXP; 1070 #endif 1071 } 1072 1073 if (restore != 0) { 1074 uchar_t type, bind; 1075 1076 /* 1077 * Make sure this COMMON symbol is returned to the same 1078 * binding as was defined in the original relocatable 1079 * object reference. 1080 */ 1081 type = ELF_ST_TYPE(symptr->st_info); 1082 if (sdp->sd_flags & FLG_SY_GLOBREF) 1083 bind = STB_GLOBAL; 1084 else 1085 bind = STB_WEAK; 1086 1087 symptr->st_info = ELF_ST_INFO(bind, type); 1088 } 1089 } 1090 1091 if (ofl->ofl_hashbkts) { 1092 qsort(sorted_syms + ofl->ofl_scopecnt + ofl->ofl_elimcnt, 1093 ofl->ofl_globcnt, sizeof (Sym_s_list), 1094 (int (*)(const void *, const void *))sym_hash_compare); 1095 } 1096 1097 for (ssndx = 0; ssndx < (ofl->ofl_elimcnt + ofl->ofl_scopecnt + 1098 ofl->ofl_globcnt); ssndx++) { 1099 const char *name; 1100 Sym *sym; 1101 Sym_aux *sap; 1102 Half spec; 1103 int local = 0, dynlocal = 0, enter_in_symtab; 1104 Gotndx *gnp; 1105 Word sectndx; 1106 1107 sdp = sorted_syms[ssndx].sl_sdp; 1108 sectndx = 0; 1109 1110 if (symtab) 1111 enter_in_symtab = 1; 1112 else 1113 enter_in_symtab = 0; 1114 1115 /* 1116 * Assign a got offset if necessary. 1117 */ 1118 if ((ld_targ.t_mr.mr_assign_got != NULL) && 1119 (*ld_targ.t_mr.mr_assign_got)(ofl, sdp) == S_ERROR) 1120 return ((Addr)S_ERROR); 1121 1122 if (DBG_ENABLED) { 1123 Aliste idx2; 1124 1125 for (ALIST_TRAVERSE(sdp->sd_GOTndxs, idx2, gnp)) { 1126 gottable->gt_sym = sdp; 1127 gottable->gt_gndx.gn_gotndx = gnp->gn_gotndx; 1128 gottable->gt_gndx.gn_addend = gnp->gn_addend; 1129 gottable++; 1130 } 1131 1132 if (sdp->sd_aux && sdp->sd_aux->sa_PLTGOTndx) { 1133 gottable->gt_sym = sdp; 1134 gottable->gt_gndx.gn_gotndx = 1135 sdp->sd_aux->sa_PLTGOTndx; 1136 gottable++; 1137 } 1138 } 1139 1140 1141 /* 1142 * If this symbol has been marked as being reduced to local 1143 * scope then it will have to be placed in the scoped portion 1144 * of the .symtab. Retain the appropriate index for use in 1145 * version symbol indexing and relocation. 1146 */ 1147 if ((sdp->sd_flags1 & FLG_SY1_HIDDEN) && 1148 (flags & FLG_OF_PROCRED)) { 1149 local = 1; 1150 if (!(sdp->sd_flags1 & FLG_SY1_ELIM) && !dynsym) 1151 sdp->sd_symndx = scopesym_ndx; 1152 else 1153 sdp->sd_symndx = 0; 1154 1155 if (sdp->sd_flags1 & FLG_SY1_ELIM) { 1156 enter_in_symtab = 0; 1157 } else if (ldynsym && sdp->sd_sym->st_name && 1158 ldynsym_symtype[ 1159 ELF_ST_TYPE(sdp->sd_sym->st_info)]) { 1160 dynlocal = 1; 1161 } 1162 } else { 1163 sdp->sd_symndx = *symndx; 1164 } 1165 1166 /* 1167 * Copy basic symbol and string information. 1168 */ 1169 name = sdp->sd_name; 1170 sap = sdp->sd_aux; 1171 1172 /* 1173 * If we require to record version symbol indexes, update the 1174 * associated version symbol information for all defined 1175 * symbols. If a version definition is required any zero value 1176 * symbol indexes would have been flagged as undefined symbol 1177 * errors, however if we're just scoping these need to fall into 1178 * the base of global symbols. 1179 */ 1180 if (sdp->sd_symndx && versym) { 1181 Half vndx = 0; 1182 1183 if (sdp->sd_flags & FLG_SY_MVTOCOMM) { 1184 vndx = VER_NDX_GLOBAL; 1185 } else if (sdp->sd_ref == REF_REL_NEED) { 1186 Half symflags1 = sdp->sd_flags1; 1187 1188 vndx = sap->sa_overndx; 1189 if ((vndx == 0) && 1190 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 1191 if (symflags1 & FLG_SY1_HIDDEN) 1192 vndx = VER_NDX_LOCAL; 1193 else 1194 vndx = VER_NDX_GLOBAL; 1195 } 1196 } else if ((sdp->sd_ref == REF_DYN_NEED) && 1197 (sap->sa_dverndx > 0) && 1198 (sap->sa_dverndx <= sdp->sd_file->ifl_vercnt) && 1199 (sdp->sd_file->ifl_verndx != NULL)) { 1200 /* Use index of verneed record */ 1201 vndx = sdp->sd_file->ifl_verndx 1202 [sap->sa_dverndx].vi_overndx; 1203 } 1204 versym[sdp->sd_symndx] = vndx; 1205 } 1206 1207 /* 1208 * If we are creating the .syminfo section then set per symbol 1209 * flags here. 1210 */ 1211 if (sdp->sd_symndx && syminfo && 1212 !(sdp->sd_flags & FLG_SY_NOTAVAIL)) { 1213 int ndx = sdp->sd_symndx; 1214 APlist **alpp = &(ofl->ofl_syminfsyms); 1215 1216 if (sdp->sd_flags & FLG_SY_MVTOCOMM) 1217 /* 1218 * Identify a copy relocation symbol. 1219 */ 1220 syminfo[ndx].si_flags |= SYMINFO_FLG_COPY; 1221 1222 if (sdp->sd_ref == REF_DYN_NEED) { 1223 /* 1224 * A reference is bound to a needed dependency. 1225 * Save this symbol descriptor, as its boundto 1226 * element will need updating after the .dynamic 1227 * section has been created. Flag whether this 1228 * reference is lazy loadable, and if a direct 1229 * binding is to be established. 1230 */ 1231 if (aplist_append(alpp, sdp, 1232 AL_CNT_OFL_SYMINFOSYMS) == NULL) 1233 return (0); 1234 1235 syminfo[ndx].si_flags |= SYMINFO_FLG_DIRECT; 1236 if (sdp->sd_flags & FLG_SY_LAZYLD) 1237 syminfo[ndx].si_flags |= 1238 SYMINFO_FLG_LAZYLOAD; 1239 1240 /* 1241 * Enable direct symbol bindings if: 1242 * 1243 * - Symbol was identified with the DIRECT 1244 * keyword in a mapfile. 1245 * 1246 * - Symbol reference has been bound to a 1247 * dependency which was specified as 1248 * requiring direct bindings with -zdirect. 1249 * 1250 * - All symbol references are required to 1251 * use direct bindings via -Bdirect. 1252 */ 1253 if (sdp->sd_flags1 & FLG_SY1_DIR) 1254 syminfo[ndx].si_flags |= 1255 SYMINFO_FLG_DIRECTBIND; 1256 1257 } else if ((sdp->sd_flags & FLG_SY_EXTERN) && 1258 (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 1259 /* 1260 * If this symbol has been explicitly defined 1261 * as external, and remains unresolved, mark 1262 * it as external. 1263 */ 1264 syminfo[ndx].si_boundto = SYMINFO_BT_EXTERN; 1265 1266 } else if ((sdp->sd_flags & FLG_SY_PARENT) && 1267 (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 1268 /* 1269 * If this symbol has been explicitly defined 1270 * to be a reference to a parent object, 1271 * indicate whether a direct binding should be 1272 * established. 1273 */ 1274 syminfo[ndx].si_flags |= SYMINFO_FLG_DIRECT; 1275 syminfo[ndx].si_boundto = SYMINFO_BT_PARENT; 1276 if (sdp->sd_flags1 & FLG_SY1_DIR) 1277 syminfo[ndx].si_flags |= 1278 SYMINFO_FLG_DIRECTBIND; 1279 1280 } else if (sdp->sd_flags & FLG_SY_STDFLTR) { 1281 /* 1282 * A filter definition. Although this symbol 1283 * can only be a stub, it might be necessary to 1284 * prevent external direct bindings. 1285 */ 1286 syminfo[ndx].si_flags |= SYMINFO_FLG_FILTER; 1287 if (sdp->sd_flags1 & FLG_SY1_NDIR) 1288 syminfo[ndx].si_flags |= 1289 SYMINFO_FLG_NOEXTDIRECT; 1290 1291 } else if (sdp->sd_flags & FLG_SY_AUXFLTR) { 1292 /* 1293 * An auxiliary filter definition. By nature, 1294 * this definition is direct, in that should the 1295 * filtee lookup fail, we'll fall back to this 1296 * object. It may still be necesssary to 1297 * prevent external direct bindings. 1298 */ 1299 syminfo[ndx].si_flags |= SYMINFO_FLG_AUXILIARY; 1300 if (sdp->sd_flags1 & FLG_SY1_NDIR) 1301 syminfo[ndx].si_flags |= 1302 SYMINFO_FLG_NOEXTDIRECT; 1303 1304 } else if ((sdp->sd_ref == REF_REL_NEED) && 1305 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 1306 1307 /* 1308 * This definition exists within the object 1309 * being created. Flag whether it is necessary 1310 * to prevent external direct bindings. 1311 */ 1312 if (sdp->sd_flags1 & FLG_SY1_NDIR) { 1313 syminfo[ndx].si_boundto = 1314 SYMINFO_BT_NONE; 1315 syminfo[ndx].si_flags |= 1316 SYMINFO_FLG_NOEXTDIRECT; 1317 } 1318 1319 /* 1320 * Indicate that this symbol is acting as an 1321 * individual interposer. 1322 */ 1323 if (sdp->sd_flags & FLG_SY_INTPOSE) { 1324 syminfo[ndx].si_flags |= 1325 SYMINFO_FLG_INTERPOSE; 1326 } 1327 1328 /* 1329 * If external bindings are allowed, or this is 1330 * a translator symbol, indicate the binding, 1331 * and a direct binding if necessary. 1332 */ 1333 if (((sdp->sd_flags1 & FLG_SY1_NDIR) == 0) || 1334 ((dtflags_1 & DF_1_TRANS) && sdp->sd_aux && 1335 sdp->sd_aux->sa_bindto)) { 1336 1337 syminfo[ndx].si_flags |= 1338 SYMINFO_FLG_DIRECT; 1339 1340 if (sdp->sd_flags1 & FLG_SY1_DIR) 1341 syminfo[ndx].si_flags |= 1342 SYMINFO_FLG_DIRECTBIND; 1343 1344 /* 1345 * If this is a translator, the symbols 1346 * boundto element will indicate the 1347 * dependency to which it should resolve 1348 * rather than itself. Save this info 1349 * for updating after the .dynamic 1350 * section has been created. 1351 */ 1352 if ((dtflags_1 & DF_1_TRANS) && 1353 sdp->sd_aux && 1354 sdp->sd_aux->sa_bindto) { 1355 if (aplist_append(alpp, sdp, 1356 AL_CNT_OFL_SYMINFOSYMS) == 1357 NULL) 1358 return (0); 1359 } else { 1360 syminfo[ndx].si_boundto = 1361 SYMINFO_BT_SELF; 1362 } 1363 } 1364 } 1365 } 1366 1367 /* 1368 * Note that the `sym' value is reset to be one of the new 1369 * symbol table entries. This symbol will be updated further 1370 * depending on the type of the symbol. Process the .symtab 1371 * first, followed by the .dynsym, thus the `sym' value will 1372 * remain as the .dynsym value when the .dynsym is present. 1373 * This ensures that any versioning symbols st_name value will 1374 * be appropriate for the string table used by version 1375 * entries. 1376 */ 1377 if (enter_in_symtab) { 1378 Word _symndx; 1379 1380 if (local) 1381 _symndx = scopesym_ndx; 1382 else 1383 _symndx = symtab_ndx; 1384 1385 symtab[_symndx] = *sdp->sd_sym; 1386 sdp->sd_sym = sym = &symtab[_symndx]; 1387 (void) st_setstring(strtab, name, &stoff); 1388 sym->st_name = stoff; 1389 } 1390 if (dynlocal) { 1391 ldynsym[ldynscopesym_ndx] = *sdp->sd_sym; 1392 sdp->sd_sym = sym = &ldynsym[ldynscopesym_ndx]; 1393 (void) st_setstring(dynstr, name, &stoff); 1394 ldynsym[ldynscopesym_ndx].st_name = stoff; 1395 /* Add it to sort section if it qualifies */ 1396 ADD_TO_DYNSORT(sdp, sym, ELF_ST_TYPE(sym->st_info), 1397 ldynscopesym_ndx); 1398 } 1399 1400 if (dynsym && !local) { 1401 dynsym[dynsym_ndx] = *sdp->sd_sym; 1402 1403 /* 1404 * Provided this isn't an unnamed register symbol, 1405 * update the symbols name and hash value. 1406 */ 1407 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 1408 dynsym[dynsym_ndx].st_name) { 1409 (void) st_setstring(dynstr, name, &stoff); 1410 dynsym[dynsym_ndx].st_name = stoff; 1411 1412 if (stoff) { 1413 Word _hashndx; 1414 1415 hashval = 1416 sap->sa_hash % ofl->ofl_hashbkts; 1417 1418 /* LINTED */ 1419 if (_hashndx = hashbkt[hashval]) { 1420 while (hashchain[_hashndx]) { 1421 _hashndx = 1422 hashchain[_hashndx]; 1423 } 1424 hashchain[_hashndx] = 1425 sdp->sd_symndx; 1426 } else { 1427 hashbkt[hashval] = 1428 sdp->sd_symndx; 1429 } 1430 } 1431 } 1432 sdp->sd_sym = sym = &dynsym[dynsym_ndx]; 1433 1434 /* 1435 * Add it to sort section if it qualifies. 1436 * The indexes in that section are relative to the 1437 * the adjacent SUNW_ldynsym/dymsym pair, so we 1438 * add the number of items in SUNW_ldynsym to the 1439 * dynsym index. 1440 */ 1441 ADD_TO_DYNSORT(sdp, sym, ELF_ST_TYPE(sym->st_info), 1442 ldynsym_cnt + dynsym_ndx); 1443 } 1444 if (!enter_in_symtab && (!dynsym || (local && !dynlocal))) { 1445 if (!(sdp->sd_flags & FLG_SY_UPREQD)) 1446 continue; 1447 sym = sdp->sd_sym; 1448 } else 1449 sdp->sd_flags &= ~FLG_SY_CLEAN; 1450 1451 1452 /* 1453 * If we have a weak data symbol for which we need the real 1454 * symbol also, save this processing until later. 1455 * 1456 * The exception to this is if the weak/strong have PLT's 1457 * assigned to them. In that case we don't do the post-weak 1458 * processing because the PLT's must be maintained so that we 1459 * can do 'interpositioning' on both of the symbols. 1460 */ 1461 if ((sap->sa_linkndx) && 1462 (ELF_ST_BIND(sym->st_info) == STB_WEAK) && 1463 (!sap->sa_PLTndx)) { 1464 Sym_desc *_sdp; 1465 1466 _sdp = sdp->sd_file->ifl_oldndx[sap->sa_linkndx]; 1467 1468 if (_sdp->sd_ref != REF_DYN_SEEN) { 1469 Wk_desc wk; 1470 1471 if (enter_in_symtab) { 1472 if (local) { 1473 wk.wk_symtab = 1474 &symtab[scopesym_ndx]; 1475 scopesym_ndx++; 1476 } else { 1477 wk.wk_symtab = 1478 &symtab[symtab_ndx]; 1479 symtab_ndx++; 1480 } 1481 } else { 1482 wk.wk_symtab = NULL; 1483 } 1484 if (dynsym) { 1485 if (!local) { 1486 wk.wk_dynsym = 1487 &dynsym[dynsym_ndx]; 1488 dynsym_ndx++; 1489 } else if (dynlocal) { 1490 wk.wk_dynsym = 1491 &ldynsym[ldynscopesym_ndx]; 1492 ldynscopesym_ndx++; 1493 } 1494 } else { 1495 wk.wk_dynsym = NULL; 1496 } 1497 wk.wk_weak = sdp; 1498 wk.wk_alias = _sdp; 1499 1500 if (alist_append(&weak, &wk, 1501 sizeof (Wk_desc), AL_CNT_WEAK) == NULL) 1502 return ((Addr)S_ERROR); 1503 1504 continue; 1505 } 1506 } 1507 1508 DBG_CALL(Dbg_syms_old(ofl, sdp)); 1509 1510 spec = NULL; 1511 /* 1512 * assign new symbol value. 1513 */ 1514 sectndx = sdp->sd_shndx; 1515 if (sectndx == SHN_UNDEF) { 1516 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) && 1517 (sym->st_value != 0)) { 1518 eprintf(ofl->ofl_lml, ERR_WARNING, 1519 MSG_INTL(MSG_SYM_NOTNULL), 1520 demangle(name), sdp->sd_file->ifl_name); 1521 } 1522 1523 /* 1524 * Undefined weak global, if we are generating a static 1525 * executable, output as an absolute zero. Otherwise 1526 * leave it as is, ld.so.1 will skip symbols of this 1527 * type (this technique allows applications and 1528 * libraries to test for the existence of a symbol as an 1529 * indication of the presence or absence of certain 1530 * functionality). 1531 */ 1532 if (((flags & (FLG_OF_STATIC | FLG_OF_EXEC)) == 1533 (FLG_OF_STATIC | FLG_OF_EXEC)) && 1534 (ELF_ST_BIND(sym->st_info) == STB_WEAK)) { 1535 sdp->sd_flags |= FLG_SY_SPECSEC; 1536 sdp->sd_shndx = sectndx = SHN_ABS; 1537 } 1538 } else if ((sdp->sd_flags & FLG_SY_SPECSEC) && 1539 (sectndx == SHN_COMMON)) { 1540 /* COMMONs have already been processed */ 1541 /* EMPTY */ 1542 ; 1543 } else { 1544 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 1545 (sectndx == SHN_ABS)) 1546 spec = sdp->sd_aux->sa_symspec; 1547 1548 /* LINTED */ 1549 if (sdp->sd_flags & FLG_SY_COMMEXP) { 1550 /* 1551 * This is (or was) a COMMON symbol which was 1552 * processed above - no processing 1553 * required here. 1554 */ 1555 ; 1556 } else if (sdp->sd_ref == REF_DYN_NEED) { 1557 uchar_t type, bind; 1558 1559 sectndx = SHN_UNDEF; 1560 sym->st_value = 0; 1561 sym->st_size = 0; 1562 1563 /* 1564 * Make sure this undefined symbol is returned 1565 * to the same binding as was defined in the 1566 * original relocatable object reference. 1567 */ 1568 type = ELF_ST_TYPE(sym-> st_info); 1569 if (sdp->sd_flags & FLG_SY_GLOBREF) 1570 bind = STB_GLOBAL; 1571 else 1572 bind = STB_WEAK; 1573 1574 sym->st_info = ELF_ST_INFO(bind, type); 1575 1576 } else if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1577 (sdp->sd_ref == REF_REL_NEED)) { 1578 osp = sdp->sd_isc->is_osdesc; 1579 /* LINTED */ 1580 sectndx = elf_ndxscn(osp->os_scn); 1581 1582 /* 1583 * In an executable, the new symbol value is the 1584 * old value (offset into defining section) plus 1585 * virtual address of defining section. In a 1586 * relocatable, the new value is the old value 1587 * plus the displacement of the section within 1588 * the file. 1589 */ 1590 /* LINTED */ 1591 sym->st_value += 1592 (Off)_elf_getxoff(sdp->sd_isc->is_indata); 1593 1594 if (!(flags & FLG_OF_RELOBJ)) { 1595 sym->st_value += osp->os_shdr->sh_addr; 1596 /* 1597 * TLS symbols are relative to 1598 * the TLS segment. 1599 */ 1600 if ((ELF_ST_TYPE(sym->st_info) == 1601 STT_TLS) && (ofl->ofl_tlsphdr)) 1602 sym->st_value -= 1603 ofl->ofl_tlsphdr->p_vaddr; 1604 } 1605 } 1606 } 1607 1608 if (spec) { 1609 switch (spec) { 1610 case SDAUX_ID_ETEXT: 1611 sym->st_value = etext; 1612 sectndx = etext_ndx; 1613 if (etext_abs) 1614 sdp->sd_flags |= FLG_SY_SPECSEC; 1615 else 1616 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1617 break; 1618 case SDAUX_ID_EDATA: 1619 sym->st_value = edata; 1620 sectndx = edata_ndx; 1621 if (edata_abs) 1622 sdp->sd_flags |= FLG_SY_SPECSEC; 1623 else 1624 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1625 break; 1626 case SDAUX_ID_END: 1627 sym->st_value = end; 1628 sectndx = end_ndx; 1629 if (end_abs) 1630 sdp->sd_flags |= FLG_SY_SPECSEC; 1631 else 1632 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1633 break; 1634 case SDAUX_ID_START: 1635 sym->st_value = start; 1636 sectndx = start_ndx; 1637 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1638 break; 1639 case SDAUX_ID_DYN: 1640 if (flags & FLG_OF_DYNAMIC) { 1641 sym->st_value = ofl-> 1642 ofl_osdynamic->os_shdr->sh_addr; 1643 /* LINTED */ 1644 sectndx = elf_ndxscn( 1645 ofl->ofl_osdynamic->os_scn); 1646 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1647 } 1648 break; 1649 case SDAUX_ID_PLT: 1650 if (ofl->ofl_osplt) { 1651 sym->st_value = ofl-> 1652 ofl_osplt->os_shdr->sh_addr; 1653 /* LINTED */ 1654 sectndx = elf_ndxscn( 1655 ofl->ofl_osplt->os_scn); 1656 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1657 } 1658 break; 1659 case SDAUX_ID_GOT: 1660 /* 1661 * Symbol bias for negative growing tables is 1662 * stored in symbol's value during 1663 * allocate_got(). 1664 */ 1665 sym->st_value += ofl-> 1666 ofl_osgot->os_shdr->sh_addr; 1667 /* LINTED */ 1668 sectndx = elf_ndxscn(ofl-> 1669 ofl_osgot->os_scn); 1670 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1671 break; 1672 default: 1673 /* NOTHING */ 1674 ; 1675 } 1676 } 1677 1678 /* 1679 * If a plt index has been assigned to an undefined function, 1680 * update the symbols value to the appropriate .plt address. 1681 */ 1682 if ((flags & FLG_OF_DYNAMIC) && (flags & FLG_OF_EXEC) && 1683 (sdp->sd_file) && 1684 (sdp->sd_file->ifl_ehdr->e_type == ET_DYN) && 1685 (ELF_ST_TYPE(sym->st_info) == STT_FUNC) && 1686 !(flags & FLG_OF_BFLAG)) { 1687 if (sap->sa_PLTndx) 1688 sym->st_value = 1689 (*ld_targ.t_mr.mr_calc_plt_addr)(sdp, ofl); 1690 } 1691 1692 /* 1693 * Finish updating the symbols. 1694 */ 1695 1696 /* 1697 * Sym Update: if scoped local - set local binding 1698 */ 1699 if (local) 1700 sym->st_info = ELF_ST_INFO(STB_LOCAL, 1701 ELF_ST_TYPE(sym->st_info)); 1702 1703 /* 1704 * Sym Updated: If both the .symtab and .dynsym 1705 * are present then we've actually updated the information in 1706 * the .dynsym, therefore copy this same information to the 1707 * .symtab entry. 1708 */ 1709 sdp->sd_shndx = sectndx; 1710 if (enter_in_symtab && dynsym && (!local || dynlocal)) { 1711 Word _symndx = dynlocal ? scopesym_ndx : symtab_ndx; 1712 1713 symtab[_symndx].st_value = sym->st_value; 1714 symtab[_symndx].st_size = sym->st_size; 1715 symtab[_symndx].st_info = sym->st_info; 1716 symtab[_symndx].st_other = sym->st_other; 1717 } 1718 1719 if (enter_in_symtab) { 1720 Word _symndx; 1721 1722 if (local) 1723 _symndx = scopesym_ndx++; 1724 else 1725 _symndx = symtab_ndx++; 1726 if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1727 (sectndx >= SHN_LORESERVE)) { 1728 assert(symshndx != NULL); 1729 symshndx[_symndx] = sectndx; 1730 symtab[_symndx].st_shndx = SHN_XINDEX; 1731 } else { 1732 /* LINTED */ 1733 symtab[_symndx].st_shndx = (Half)sectndx; 1734 } 1735 } 1736 1737 if (dynsym && (!local || dynlocal)) { 1738 /* 1739 * dynsym and ldynsym are distinct tables, so 1740 * we use indirection to access the right one 1741 * and the related extended section index array. 1742 */ 1743 Word _symndx; 1744 Sym *_dynsym; 1745 Word *_dynshndx; 1746 1747 if (!local) { 1748 _symndx = dynsym_ndx++; 1749 _dynsym = dynsym; 1750 _dynshndx = dynshndx; 1751 } else { 1752 _symndx = ldynscopesym_ndx++; 1753 _dynsym = ldynsym; 1754 _dynshndx = ldynshndx; 1755 } 1756 if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1757 (sectndx >= SHN_LORESERVE)) { 1758 assert(_dynshndx != NULL); 1759 _dynshndx[_symndx] = sectndx; 1760 _dynsym[_symndx].st_shndx = SHN_XINDEX; 1761 } else { 1762 /* LINTED */ 1763 _dynsym[_symndx].st_shndx = (Half)sectndx; 1764 } 1765 } 1766 1767 DBG_CALL(Dbg_syms_new(ofl, sym, sdp)); 1768 } 1769 1770 /* 1771 * Now that all the symbols have been processed update any weak symbols 1772 * information (ie. copy all information except `st_name'). As both 1773 * symbols will be represented in the output, return the weak symbol to 1774 * its correct type. 1775 */ 1776 for (ALIST_TRAVERSE(weak, idx1, wkp)) { 1777 Sym_desc *sdp, *_sdp; 1778 Sym *sym, *_sym, *__sym; 1779 uchar_t bind; 1780 1781 sdp = wkp->wk_weak; 1782 _sdp = wkp->wk_alias; 1783 _sym = __sym = _sdp->sd_sym; 1784 1785 sdp->sd_flags |= FLG_SY_WEAKDEF; 1786 1787 /* 1788 * If the symbol definition has been scoped then assign it to 1789 * be local, otherwise if it's from a shared object then we need 1790 * to maintain the binding of the original reference. 1791 */ 1792 if (sdp->sd_flags1 & FLG_SY1_HIDDEN) { 1793 if (flags & FLG_OF_PROCRED) 1794 bind = STB_LOCAL; 1795 else 1796 bind = STB_WEAK; 1797 } else if ((sdp->sd_ref == REF_DYN_NEED) && 1798 (sdp->sd_flags & FLG_SY_GLOBREF)) 1799 bind = STB_GLOBAL; 1800 else 1801 bind = STB_WEAK; 1802 1803 DBG_CALL(Dbg_syms_old(ofl, sdp)); 1804 if ((sym = wkp->wk_symtab) != NULL) { 1805 sym->st_value = _sym->st_value; 1806 sym->st_size = _sym->st_size; 1807 sym->st_other = _sym->st_other; 1808 sym->st_shndx = _sym->st_shndx; 1809 sym->st_info = ELF_ST_INFO(bind, 1810 ELF_ST_TYPE(sym->st_info)); 1811 __sym = sym; 1812 } 1813 if ((sym = wkp->wk_dynsym) != NULL) { 1814 sym->st_value = _sym->st_value; 1815 sym->st_size = _sym->st_size; 1816 sym->st_other = _sym->st_other; 1817 sym->st_shndx = _sym->st_shndx; 1818 sym->st_info = ELF_ST_INFO(bind, 1819 ELF_ST_TYPE(sym->st_info)); 1820 __sym = sym; 1821 } 1822 DBG_CALL(Dbg_syms_new(ofl, __sym, sdp)); 1823 } 1824 1825 /* 1826 * Now display GOT debugging information if required. 1827 */ 1828 DBG_CALL(Dbg_got_display(ofl, 0, 0, 1829 ld_targ.t_m.m_got_xnumber, ld_targ.t_m.m_got_entsize)); 1830 1831 /* 1832 * Update the section headers information. sh_info is 1833 * supposed to contain the offset at which the first 1834 * global symbol resides in the symbol table, while 1835 * sh_link contains the section index of the associated 1836 * string table. 1837 */ 1838 if (symtab) { 1839 Shdr *shdr = ofl->ofl_ossymtab->os_shdr; 1840 1841 shdr->sh_info = symtab_gbl_bndx; 1842 /* LINTED */ 1843 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osstrtab->os_scn); 1844 if (symshndx) { 1845 shdr = ofl->ofl_ossymshndx->os_shdr; 1846 shdr->sh_link = 1847 (Word)elf_ndxscn(ofl->ofl_ossymtab->os_scn); 1848 } 1849 1850 /* 1851 * Ensure that the expected number of symbols 1852 * were entered into the right spots: 1853 * - Scoped symbols in the right range 1854 * - Globals start at the right spot 1855 * (correct number of locals entered) 1856 * - The table is exactly filled 1857 * (correct number of globals entered) 1858 */ 1859 assert((scopesym_bndx + ofl->ofl_scopecnt) == scopesym_ndx); 1860 assert(shdr->sh_info == (ofl->ofl_shdrcnt + 1861 ofl->ofl_locscnt + ofl->ofl_scopecnt + 2)); 1862 assert((shdr->sh_info + ofl->ofl_globcnt) == symtab_ndx); 1863 } 1864 if (dynsym) { 1865 Shdr *shdr = ofl->ofl_osdynsym->os_shdr; 1866 1867 shdr->sh_info = 1 + ofl->ofl_dynshdrcnt + ofl->ofl_lregsymcnt; 1868 /* LINTED */ 1869 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 1870 1871 ofl->ofl_oshash->os_shdr->sh_link = 1872 /* LINTED */ 1873 (Word)elf_ndxscn(ofl->ofl_osdynsym->os_scn); 1874 if (dynshndx) { 1875 shdr = ofl->ofl_osdynshndx->os_shdr; 1876 shdr->sh_link = 1877 (Word)elf_ndxscn(ofl->ofl_osdynsym->os_scn); 1878 } 1879 } 1880 if (ldynsym) { 1881 Shdr *shdr = ofl->ofl_osldynsym->os_shdr; 1882 1883 /* ldynsym has no globals, so give index one past the end */ 1884 shdr->sh_info = ldynsym_ndx; 1885 1886 /* 1887 * The ldynsym and dynsym must be adjacent. The 1888 * idea is that rtld should be able to start with 1889 * the ldynsym and march straight through the end 1890 * of dynsym, seeing them as a single symbol table, 1891 * despite the fact that they are in distinct sections. 1892 * Ensure that this happened correctly. 1893 * 1894 * Note that I use ldynsym_ndx here instead of the 1895 * computation I used to set the section size 1896 * (found in ldynsym_cnt). The two will agree, unless 1897 * we somehow miscounted symbols or failed to insert them 1898 * all. Using ldynsym_ndx here catches that error in 1899 * addition to checking for adjacency. 1900 */ 1901 assert(dynsym == (ldynsym + ldynsym_ndx)); 1902 1903 1904 /* LINTED */ 1905 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 1906 1907 if (ldynshndx) { 1908 shdr = ofl->ofl_osldynshndx->os_shdr; 1909 shdr->sh_link = 1910 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 1911 } 1912 1913 /* 1914 * The presence of .SUNW_ldynsym means that there may be 1915 * associated sort sections, one for regular symbols 1916 * and the other for TLS. Each sort section needs the 1917 * following done: 1918 * - Section header link references .SUNW_ldynsym 1919 * - Should have received the expected # of items 1920 * - Sorted by increasing address 1921 */ 1922 if (ofl->ofl_osdynsymsort) { /* .SUNW_dynsymsort */ 1923 ofl->ofl_osdynsymsort->os_shdr->sh_link = 1924 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 1925 assert(ofl->ofl_dynsymsortcnt == dynsymsort_ndx); 1926 1927 if (dynsymsort_ndx > 1) { 1928 dynsort_compare_syms = ldynsym; 1929 qsort(dynsymsort, dynsymsort_ndx, 1930 sizeof (*dynsymsort), dynsort_compare); 1931 dynsort_dupwarn(ofl, ldynsym, 1932 st_getstrbuf(dynstr), 1933 dynsymsort, dynsymsort_ndx, 1934 MSG_ORIG(MSG_SCN_DYNSYMSORT)); 1935 } 1936 } 1937 if (ofl->ofl_osdyntlssort) { /* .SUNW_dyntlssort */ 1938 ofl->ofl_osdyntlssort->os_shdr->sh_link = 1939 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 1940 assert(ofl->ofl_dyntlssortcnt == dyntlssort_ndx); 1941 1942 if (dyntlssort_ndx > 1) { 1943 dynsort_compare_syms = ldynsym; 1944 qsort(dyntlssort, dyntlssort_ndx, 1945 sizeof (*dyntlssort), dynsort_compare); 1946 dynsort_dupwarn(ofl, ldynsym, 1947 st_getstrbuf(dynstr), 1948 dyntlssort, dyntlssort_ndx, 1949 MSG_ORIG(MSG_SCN_DYNTLSSORT)); 1950 } 1951 } 1952 } 1953 1954 /* 1955 * Used by ld.so.1 only. 1956 */ 1957 return (etext); 1958 1959 #undef ADD_TO_DYNSORT 1960 } 1961 1962 /* 1963 * Build the dynamic section. 1964 * 1965 * This routine must be maintained in parallel with make_dynamic() 1966 * in sections.c 1967 */ 1968 static int 1969 update_odynamic(Ofl_desc *ofl) 1970 { 1971 Aliste idx; 1972 Ifl_desc *ifl; 1973 Sym_desc *sdp; 1974 Shdr *shdr; 1975 Dyn *_dyn = (Dyn *)ofl->ofl_osdynamic->os_outdata->d_buf; 1976 Dyn *dyn; 1977 Str_tbl *dynstr; 1978 size_t stoff; 1979 ofl_flag_t flags = ofl->ofl_flags; 1980 int not_relobj = !(flags & FLG_OF_RELOBJ); 1981 Word cnt; 1982 1983 /* 1984 * A relocatable object with a dynamic section is possible, though 1985 * rare. One use for this feature is to produce drivers 1986 * for the kernel, loaded by krtld. 1987 * 1988 * Only a limited subset of DT_ entries apply to relocatable 1989 * objects: 1990 * 1991 * DT_NEEDED 1992 * DT_RUNPATH/DT_RPATH 1993 * DT_FLAGS 1994 * DT_FLAGS1 1995 * DT_SUNW_STRPAD 1996 * DT_LDMACH 1997 */ 1998 dynstr = ofl->ofl_dynstrtab; 1999 ofl->ofl_osdynamic->os_shdr->sh_link = 2000 /* LINTED */ 2001 (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 2002 2003 dyn = _dyn; 2004 2005 for (APLIST_TRAVERSE(ofl->ofl_sos, idx, ifl)) { 2006 if ((ifl->ifl_flags & 2007 (FLG_IF_IGNORE | FLG_IF_DEPREQD)) == FLG_IF_IGNORE) 2008 continue; 2009 2010 /* 2011 * Create and set up the DT_POSFLAG_1 entry here if required. 2012 */ 2013 if ((ifl->ifl_flags & (FLG_IF_LAZYLD|FLG_IF_GRPPRM)) && 2014 (ifl->ifl_flags & (FLG_IF_NEEDED)) && not_relobj) { 2015 dyn->d_tag = DT_POSFLAG_1; 2016 if (ifl->ifl_flags & FLG_IF_LAZYLD) 2017 dyn->d_un.d_val = DF_P1_LAZYLOAD; 2018 if (ifl->ifl_flags & FLG_IF_GRPPRM) 2019 dyn->d_un.d_val |= DF_P1_GROUPPERM; 2020 dyn++; 2021 } 2022 2023 if (ifl->ifl_flags & (FLG_IF_NEEDED | FLG_IF_NEEDSTR)) 2024 dyn->d_tag = DT_NEEDED; 2025 else 2026 continue; 2027 2028 (void) st_setstring(dynstr, ifl->ifl_soname, &stoff); 2029 dyn->d_un.d_val = stoff; 2030 /* LINTED */ 2031 ifl->ifl_neededndx = (Half)(((uintptr_t)dyn - (uintptr_t)_dyn) / 2032 sizeof (Dyn)); 2033 dyn++; 2034 } 2035 2036 if (not_relobj) { 2037 if (ofl->ofl_dtsfltrs != NULL) { 2038 Dfltr_desc *dftp; 2039 2040 for (ALIST_TRAVERSE(ofl->ofl_dtsfltrs, idx, dftp)) { 2041 if (dftp->dft_flag == FLG_SY_AUXFLTR) 2042 dyn->d_tag = DT_SUNW_AUXILIARY; 2043 else 2044 dyn->d_tag = DT_SUNW_FILTER; 2045 2046 (void) st_setstring(dynstr, dftp->dft_str, 2047 &stoff); 2048 dyn->d_un.d_val = stoff; 2049 dftp->dft_ndx = (Half)(((uintptr_t)dyn - 2050 (uintptr_t)_dyn) / sizeof (Dyn)); 2051 dyn++; 2052 } 2053 } 2054 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_INIT_U), 2055 SYM_NOHASH, 0, ofl)) != NULL) && 2056 (sdp->sd_ref == REF_REL_NEED) && 2057 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 2058 dyn->d_tag = DT_INIT; 2059 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2060 dyn++; 2061 } 2062 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_FINI_U), 2063 SYM_NOHASH, 0, ofl)) != NULL) && 2064 (sdp->sd_ref == REF_REL_NEED) && 2065 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 2066 dyn->d_tag = DT_FINI; 2067 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2068 dyn++; 2069 } 2070 if (ofl->ofl_soname) { 2071 dyn->d_tag = DT_SONAME; 2072 (void) st_setstring(dynstr, ofl->ofl_soname, &stoff); 2073 dyn->d_un.d_val = stoff; 2074 dyn++; 2075 } 2076 if (ofl->ofl_filtees) { 2077 if (flags & FLG_OF_AUX) { 2078 dyn->d_tag = DT_AUXILIARY; 2079 } else { 2080 dyn->d_tag = DT_FILTER; 2081 } 2082 (void) st_setstring(dynstr, ofl->ofl_filtees, &stoff); 2083 dyn->d_un.d_val = stoff; 2084 dyn++; 2085 } 2086 } 2087 2088 if (ofl->ofl_rpath) { 2089 (void) st_setstring(dynstr, ofl->ofl_rpath, &stoff); 2090 dyn->d_tag = DT_RUNPATH; 2091 dyn->d_un.d_val = stoff; 2092 dyn++; 2093 dyn->d_tag = DT_RPATH; 2094 dyn->d_un.d_val = stoff; 2095 dyn++; 2096 } 2097 2098 if (not_relobj) { 2099 Aliste idx; 2100 2101 if (ofl->ofl_config) { 2102 dyn->d_tag = DT_CONFIG; 2103 (void) st_setstring(dynstr, ofl->ofl_config, &stoff); 2104 dyn->d_un.d_val = stoff; 2105 dyn++; 2106 } 2107 if (ofl->ofl_depaudit) { 2108 dyn->d_tag = DT_DEPAUDIT; 2109 (void) st_setstring(dynstr, ofl->ofl_depaudit, &stoff); 2110 dyn->d_un.d_val = stoff; 2111 dyn++; 2112 } 2113 if (ofl->ofl_audit) { 2114 dyn->d_tag = DT_AUDIT; 2115 (void) st_setstring(dynstr, ofl->ofl_audit, &stoff); 2116 dyn->d_un.d_val = stoff; 2117 dyn++; 2118 } 2119 2120 dyn->d_tag = DT_HASH; 2121 dyn->d_un.d_ptr = ofl->ofl_oshash->os_shdr->sh_addr; 2122 dyn++; 2123 2124 shdr = ofl->ofl_osdynstr->os_shdr; 2125 dyn->d_tag = DT_STRTAB; 2126 dyn->d_un.d_ptr = shdr->sh_addr; 2127 dyn++; 2128 2129 dyn->d_tag = DT_STRSZ; 2130 dyn->d_un.d_ptr = shdr->sh_size; 2131 dyn++; 2132 2133 shdr = ofl->ofl_osdynsym->os_shdr; 2134 dyn->d_tag = DT_SYMTAB; 2135 dyn->d_un.d_ptr = shdr->sh_addr; 2136 dyn++; 2137 2138 dyn->d_tag = DT_SYMENT; 2139 dyn->d_un.d_ptr = shdr->sh_entsize; 2140 dyn++; 2141 2142 if (ofl->ofl_osldynsym) { 2143 /* 2144 * We have arranged for the .SUNW_ldynsym data to be 2145 * immediately in front of the .dynsym data. 2146 * This means that you could start at the top 2147 * of .SUNW_ldynsym and see the data for both tables 2148 * without a break. This is the view we want to 2149 * provide for DT_SUNW_SYMTAB, which is why we 2150 * add the lengths together. 2151 */ 2152 Shdr *lshdr = ofl->ofl_osldynsym->os_shdr; 2153 dyn->d_tag = DT_SUNW_SYMTAB; 2154 dyn->d_un.d_ptr = lshdr->sh_addr; 2155 dyn++; 2156 2157 dyn->d_tag = DT_SUNW_SYMSZ; 2158 dyn->d_un.d_val = lshdr->sh_size + shdr->sh_size; 2159 dyn++; 2160 } 2161 2162 if (ofl->ofl_osdynsymsort || ofl->ofl_osdyntlssort) { 2163 dyn->d_tag = DT_SUNW_SORTENT; 2164 dyn->d_un.d_val = sizeof (Word); 2165 dyn++; 2166 } 2167 2168 if (ofl->ofl_osdynsymsort) { 2169 dyn->d_tag = DT_SUNW_SYMSORT; 2170 dyn->d_un.d_ptr = 2171 ofl->ofl_osdynsymsort->os_shdr->sh_addr; 2172 dyn++; 2173 2174 dyn->d_tag = DT_SUNW_SYMSORTSZ; 2175 dyn->d_un.d_val = 2176 ofl->ofl_osdynsymsort->os_shdr->sh_size; 2177 dyn++; 2178 } 2179 2180 if (ofl->ofl_osdyntlssort) { 2181 dyn->d_tag = DT_SUNW_TLSSORT; 2182 dyn->d_un.d_ptr = 2183 ofl->ofl_osdyntlssort->os_shdr->sh_addr; 2184 dyn++; 2185 2186 dyn->d_tag = DT_SUNW_TLSSORTSZ; 2187 dyn->d_un.d_val = 2188 ofl->ofl_osdyntlssort->os_shdr->sh_size; 2189 dyn++; 2190 } 2191 2192 /* 2193 * Reserve the DT_CHECKSUM entry. Its value will be filled in 2194 * after the complete image is built. 2195 */ 2196 dyn->d_tag = DT_CHECKSUM; 2197 ofl->ofl_checksum = &dyn->d_un.d_val; 2198 dyn++; 2199 2200 /* 2201 * Versioning sections: DT_VERDEF and DT_VERNEED. 2202 * 2203 * The Solaris ld does not produce DT_VERSYM, but the GNU ld 2204 * does, in order to support their style of versioning, which 2205 * differs from ours: 2206 * 2207 * - The top bit of the 16-bit Versym index is 2208 * not part of the version, but is interpreted 2209 * as a "hidden bit". 2210 * 2211 * - External (SHN_UNDEF) symbols can have non-zero 2212 * Versym values, which specify versions in 2213 * referenced objects, via the Verneed section. 2214 * 2215 * - The vna_other field of the Vernaux structures 2216 * found in the Verneed section are not zero as 2217 * with Solaris, but instead contain the version 2218 * index to be used by Versym indices to reference 2219 * the given external version. 2220 * 2221 * The Solaris ld, rtld, and elfdump programs all interpret the 2222 * presence of DT_VERSYM as meaning that GNU versioning rules 2223 * apply to the given file. If DT_VERSYM is not present, 2224 * then Solaris versioning rules apply. If we should ever need 2225 * to change our ld so that it does issue DT_VERSYM, then 2226 * this rule for detecting GNU versioning will no longer work. 2227 * In that case, we will have to invent a way to explicitly 2228 * specify the style of versioning in use, perhaps via a 2229 * new dynamic entry named something like DT_SUNW_VERSIONSTYLE, 2230 * where the d_un.d_val value specifies which style is to be 2231 * used. 2232 */ 2233 if ((flags & (FLG_OF_VERDEF | FLG_OF_NOVERSEC)) == 2234 FLG_OF_VERDEF) { 2235 shdr = ofl->ofl_osverdef->os_shdr; 2236 dyn->d_tag = DT_VERDEF; 2237 dyn->d_un.d_ptr = shdr->sh_addr; 2238 dyn++; 2239 dyn->d_tag = DT_VERDEFNUM; 2240 dyn->d_un.d_ptr = shdr->sh_info; 2241 dyn++; 2242 } 2243 if ((flags & (FLG_OF_VERNEED | FLG_OF_NOVERSEC)) == 2244 FLG_OF_VERNEED) { 2245 shdr = ofl->ofl_osverneed->os_shdr; 2246 dyn->d_tag = DT_VERNEED; 2247 dyn->d_un.d_ptr = shdr->sh_addr; 2248 dyn++; 2249 dyn->d_tag = DT_VERNEEDNUM; 2250 dyn->d_un.d_ptr = shdr->sh_info; 2251 dyn++; 2252 } 2253 2254 if ((flags & FLG_OF_COMREL) && ofl->ofl_relocrelcnt) { 2255 dyn->d_tag = ld_targ.t_m.m_rel_dt_count; 2256 dyn->d_un.d_val = ofl->ofl_relocrelcnt; 2257 dyn++; 2258 } 2259 if (flags & FLG_OF_TEXTREL) { 2260 /* 2261 * Only the presence of this entry is used in this 2262 * implementation, not the value stored. 2263 */ 2264 dyn->d_tag = DT_TEXTREL; 2265 dyn->d_un.d_val = 0; 2266 dyn++; 2267 } 2268 2269 if (ofl->ofl_osfiniarray) { 2270 shdr = ofl->ofl_osfiniarray->os_shdr; 2271 2272 dyn->d_tag = DT_FINI_ARRAY; 2273 dyn->d_un.d_ptr = shdr->sh_addr; 2274 dyn++; 2275 2276 dyn->d_tag = DT_FINI_ARRAYSZ; 2277 dyn->d_un.d_val = shdr->sh_size; 2278 dyn++; 2279 } 2280 2281 if (ofl->ofl_osinitarray) { 2282 shdr = ofl->ofl_osinitarray->os_shdr; 2283 2284 dyn->d_tag = DT_INIT_ARRAY; 2285 dyn->d_un.d_ptr = shdr->sh_addr; 2286 dyn++; 2287 2288 dyn->d_tag = DT_INIT_ARRAYSZ; 2289 dyn->d_un.d_val = shdr->sh_size; 2290 dyn++; 2291 } 2292 2293 if (ofl->ofl_ospreinitarray) { 2294 shdr = ofl->ofl_ospreinitarray->os_shdr; 2295 2296 dyn->d_tag = DT_PREINIT_ARRAY; 2297 dyn->d_un.d_ptr = shdr->sh_addr; 2298 dyn++; 2299 2300 dyn->d_tag = DT_PREINIT_ARRAYSZ; 2301 dyn->d_un.d_val = shdr->sh_size; 2302 dyn++; 2303 } 2304 2305 if (ofl->ofl_pltcnt) { 2306 shdr = ofl->ofl_osplt->os_relosdesc->os_shdr; 2307 2308 dyn->d_tag = DT_PLTRELSZ; 2309 dyn->d_un.d_ptr = shdr->sh_size; 2310 dyn++; 2311 dyn->d_tag = DT_PLTREL; 2312 dyn->d_un.d_ptr = ld_targ.t_m.m_rel_dt_type; 2313 dyn++; 2314 dyn->d_tag = DT_JMPREL; 2315 dyn->d_un.d_ptr = shdr->sh_addr; 2316 dyn++; 2317 } 2318 if (ofl->ofl_pltpad) { 2319 shdr = ofl->ofl_osplt->os_shdr; 2320 2321 dyn->d_tag = DT_PLTPAD; 2322 if (ofl->ofl_pltcnt) { 2323 dyn->d_un.d_ptr = shdr->sh_addr + 2324 ld_targ.t_m.m_plt_reservsz + 2325 ofl->ofl_pltcnt * ld_targ.t_m.m_plt_entsize; 2326 } else 2327 dyn->d_un.d_ptr = shdr->sh_addr; 2328 dyn++; 2329 dyn->d_tag = DT_PLTPADSZ; 2330 dyn->d_un.d_val = ofl->ofl_pltpad * 2331 ld_targ.t_m.m_plt_entsize; 2332 dyn++; 2333 } 2334 if (ofl->ofl_relocsz) { 2335 dyn->d_tag = ld_targ.t_m.m_rel_dt_type; 2336 dyn->d_un.d_ptr = ofl->ofl_osrelhead->os_shdr->sh_addr; 2337 dyn++; 2338 dyn->d_tag = ld_targ.t_m.m_rel_dt_size; 2339 dyn->d_un.d_ptr = ofl->ofl_relocsz; 2340 dyn++; 2341 dyn->d_tag = ld_targ.t_m.m_rel_dt_ent; 2342 if (ofl->ofl_osrelhead->os_shdr->sh_type == SHT_REL) 2343 dyn->d_un.d_ptr = sizeof (Rel); 2344 else 2345 dyn->d_un.d_ptr = sizeof (Rela); 2346 dyn++; 2347 } 2348 if (ofl->ofl_ossyminfo) { 2349 shdr = ofl->ofl_ossyminfo->os_shdr; 2350 dyn->d_tag = DT_SYMINFO; 2351 dyn->d_un.d_ptr = shdr->sh_addr; 2352 dyn++; 2353 dyn->d_tag = DT_SYMINSZ; 2354 dyn->d_un.d_val = shdr->sh_size; 2355 dyn++; 2356 dyn->d_tag = DT_SYMINENT; 2357 dyn->d_un.d_val = sizeof (Syminfo); 2358 dyn++; 2359 } 2360 if (ofl->ofl_osmove) { 2361 Os_desc *osp; 2362 2363 dyn->d_tag = DT_MOVEENT; 2364 osp = ofl->ofl_osmove; 2365 dyn->d_un.d_val = osp->os_shdr->sh_entsize; 2366 dyn++; 2367 dyn->d_tag = DT_MOVESZ; 2368 dyn->d_un.d_val = osp->os_shdr->sh_size; 2369 dyn++; 2370 dyn->d_tag = DT_MOVETAB; 2371 dyn->d_un.d_val = osp->os_shdr->sh_addr; 2372 dyn++; 2373 } 2374 if (ofl->ofl_regsymcnt) { 2375 int ndx; 2376 2377 for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 2378 if ((sdp = ofl->ofl_regsyms[ndx]) == NULL) 2379 continue; 2380 2381 dyn->d_tag = ld_targ.t_m.m_dt_register; 2382 dyn->d_un.d_val = sdp->sd_symndx; 2383 dyn++; 2384 } 2385 } 2386 2387 for (APLIST_TRAVERSE(ofl->ofl_rtldinfo, idx, sdp)) { 2388 dyn->d_tag = DT_SUNW_RTLDINF; 2389 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2390 dyn++; 2391 } 2392 2393 if (ofl->ofl_osdynamic->os_sgdesc && 2394 (ofl->ofl_osdynamic->os_sgdesc->sg_phdr.p_flags & PF_W)) { 2395 if (ofl->ofl_osinterp) { 2396 dyn->d_tag = DT_DEBUG; 2397 dyn->d_un.d_ptr = 0; 2398 dyn++; 2399 } 2400 2401 dyn->d_tag = DT_FEATURE_1; 2402 if (ofl->ofl_osmove) 2403 dyn->d_un.d_val = 0; 2404 else 2405 dyn->d_un.d_val = DTF_1_PARINIT; 2406 dyn++; 2407 } 2408 2409 if (ofl->ofl_oscap) { 2410 dyn->d_tag = DT_SUNW_CAP; 2411 dyn->d_un.d_val = ofl->ofl_oscap->os_shdr->sh_addr; 2412 dyn++; 2413 } 2414 2415 if (flags & FLG_OF_SYMBOLIC) { 2416 dyn->d_tag = DT_SYMBOLIC; 2417 dyn->d_un.d_val = 0; 2418 dyn++; 2419 } 2420 } 2421 2422 dyn->d_tag = DT_FLAGS; 2423 dyn->d_un.d_val = ofl->ofl_dtflags; 2424 dyn++; 2425 2426 /* 2427 * If -Bdirect was specified, but some NODIRECT symbols were specified 2428 * via a mapfile, or -znodirect was used on the command line, then 2429 * clear the DF_1_DIRECT flag. The resultant object will use per-symbol 2430 * direct bindings rather than be enabled for global direct bindings. 2431 */ 2432 if (ofl->ofl_flags1 & FLG_OF1_NDIRECT) { 2433 ofl->ofl_dtflags_1 &= ~DF_1_DIRECT; 2434 ofl->ofl_dtflags_1 |= DF_1_NODIRECT; 2435 } 2436 2437 dyn->d_tag = DT_FLAGS_1; 2438 dyn->d_un.d_val = ofl->ofl_dtflags_1; 2439 dyn++; 2440 2441 dyn->d_tag = DT_SUNW_STRPAD; 2442 dyn->d_un.d_val = DYNSTR_EXTRA_PAD; 2443 dyn++; 2444 2445 dyn->d_tag = DT_SUNW_LDMACH; 2446 dyn->d_un.d_val = ld_sunw_ldmach(); 2447 dyn++; 2448 2449 (*ld_targ.t_mr.mr_mach_update_odynamic)(ofl, &dyn); 2450 2451 for (cnt = 1 + DYNAMIC_EXTRA_ELTS; cnt--; dyn++) { 2452 dyn->d_tag = DT_NULL; 2453 dyn->d_un.d_val = 0; 2454 } 2455 2456 /* 2457 * Ensure that we wrote the right number of entries. If not, 2458 * we either miscounted in make_dynamic(), or we did something wrong 2459 * in this function. 2460 */ 2461 assert((ofl->ofl_osdynamic->os_shdr->sh_size / 2462 ofl->ofl_osdynamic->os_shdr->sh_entsize) == 2463 ((uintptr_t)dyn - (uintptr_t)_dyn) / sizeof (*dyn)); 2464 2465 return (1); 2466 } 2467 2468 /* 2469 * Build the version definition section 2470 */ 2471 static int 2472 update_overdef(Ofl_desc *ofl) 2473 { 2474 Aliste idx1; 2475 Ver_desc *vdp, *_vdp; 2476 Verdef *vdf, *_vdf; 2477 int num = 0; 2478 Os_desc *strosp; 2479 2480 /* 2481 * Traverse the version descriptors and update the version structures 2482 * to point to the dynstr name in preparation for building the version 2483 * section structure. 2484 */ 2485 for (APLIST_TRAVERSE(ofl->ofl_verdesc, idx1, vdp)) { 2486 Sym_desc *sdp; 2487 2488 if (vdp->vd_flags & VER_FLG_BASE) { 2489 const char *name = vdp->vd_name; 2490 size_t stoff; 2491 2492 /* 2493 * Create a new string table entry to represent the base 2494 * version name (there is no corresponding symbol for 2495 * this). 2496 */ 2497 if (!(ofl->ofl_flags & FLG_OF_DYNAMIC)) { 2498 (void) st_setstring(ofl->ofl_strtab, 2499 name, &stoff); 2500 /* LINTED */ 2501 vdp->vd_name = (const char *)stoff; 2502 } else { 2503 (void) st_setstring(ofl->ofl_dynstrtab, 2504 name, &stoff); 2505 /* LINTED */ 2506 vdp->vd_name = (const char *)stoff; 2507 } 2508 } else { 2509 sdp = ld_sym_find(vdp->vd_name, vdp->vd_hash, 0, ofl); 2510 /* LINTED */ 2511 vdp->vd_name = (const char *) 2512 (uintptr_t)sdp->sd_sym->st_name; 2513 } 2514 } 2515 2516 _vdf = vdf = (Verdef *)ofl->ofl_osverdef->os_outdata->d_buf; 2517 2518 /* 2519 * Traverse the version descriptors and update the version section to 2520 * reflect each version and its associated dependencies. 2521 */ 2522 for (APLIST_TRAVERSE(ofl->ofl_verdesc, idx1, vdp)) { 2523 Aliste idx2; 2524 Half cnt = 1; 2525 Verdaux *vdap, *_vdap; 2526 2527 _vdap = vdap = (Verdaux *)(vdf + 1); 2528 2529 vdf->vd_version = VER_DEF_CURRENT; 2530 vdf->vd_flags = vdp->vd_flags & MSK_VER_USER; 2531 vdf->vd_ndx = vdp->vd_ndx; 2532 vdf->vd_hash = vdp->vd_hash; 2533 2534 /* LINTED */ 2535 vdap->vda_name = (uintptr_t)vdp->vd_name; 2536 vdap++; 2537 /* LINTED */ 2538 _vdap->vda_next = (Word)((uintptr_t)vdap - (uintptr_t)_vdap); 2539 2540 /* 2541 * Traverse this versions dependency list generating the 2542 * appropriate version dependency entries. 2543 */ 2544 for (APLIST_TRAVERSE(vdp->vd_deps, idx2, _vdp)) { 2545 /* LINTED */ 2546 vdap->vda_name = (uintptr_t)_vdp->vd_name; 2547 _vdap = vdap; 2548 vdap++, cnt++; 2549 /* LINTED */ 2550 _vdap->vda_next = (Word)((uintptr_t)vdap - 2551 (uintptr_t)_vdap); 2552 } 2553 _vdap->vda_next = 0; 2554 2555 /* 2556 * Record the versions auxiliary array offset and the associated 2557 * dependency count. 2558 */ 2559 /* LINTED */ 2560 vdf->vd_aux = (Word)((uintptr_t)(vdf + 1) - (uintptr_t)vdf); 2561 vdf->vd_cnt = cnt; 2562 2563 /* 2564 * Record the next versions offset and update the version 2565 * pointer. Remember the previous version offset as the very 2566 * last structures next pointer should be null. 2567 */ 2568 _vdf = vdf; 2569 vdf = (Verdef *)vdap, num++; 2570 /* LINTED */ 2571 _vdf->vd_next = (Word)((uintptr_t)vdf - (uintptr_t)_vdf); 2572 } 2573 _vdf->vd_next = 0; 2574 2575 /* 2576 * Record the string table association with the version definition 2577 * section, and the symbol table associated with the version symbol 2578 * table (the actual contents of the version symbol table are filled 2579 * in during symbol update). 2580 */ 2581 if ((ofl->ofl_flags & FLG_OF_RELOBJ) || 2582 (ofl->ofl_flags & FLG_OF_STATIC)) { 2583 strosp = ofl->ofl_osstrtab; 2584 } else { 2585 strosp = ofl->ofl_osdynstr; 2586 } 2587 /* LINTED */ 2588 ofl->ofl_osverdef->os_shdr->sh_link = (Word)elf_ndxscn(strosp->os_scn); 2589 2590 /* 2591 * The version definition sections `info' field is used to indicate the 2592 * number of entries in this section. 2593 */ 2594 ofl->ofl_osverdef->os_shdr->sh_info = num; 2595 2596 return (1); 2597 } 2598 2599 /* 2600 * Finish the version symbol index section 2601 */ 2602 static int 2603 update_oversym(Ofl_desc *ofl) 2604 { 2605 Os_desc *symosp; 2606 2607 /* 2608 * Record the string table association with the version definition 2609 * section, and the symbol table associated with the version symbol 2610 * table (the actual contents of the version symbol table are filled 2611 * in during symbol update). 2612 */ 2613 if ((ofl->ofl_flags & FLG_OF_RELOBJ) || 2614 (ofl->ofl_flags & FLG_OF_STATIC)) { 2615 symosp = ofl->ofl_ossymtab; 2616 } else { 2617 symosp = ofl->ofl_osdynsym; 2618 } 2619 2620 /* LINTED */ 2621 ofl->ofl_osversym->os_shdr->sh_link = (Word)elf_ndxscn(symosp->os_scn); 2622 2623 return (1); 2624 } 2625 2626 /* 2627 * Build the version needed section 2628 */ 2629 static int 2630 update_overneed(Ofl_desc *ofl) 2631 { 2632 Aliste idx1; 2633 Ifl_desc *ifl; 2634 Verneed *vnd, *_vnd; 2635 Str_tbl *dynstr; 2636 Word num = 0; 2637 2638 dynstr = ofl->ofl_dynstrtab; 2639 _vnd = vnd = (Verneed *)ofl->ofl_osverneed->os_outdata->d_buf; 2640 2641 /* 2642 * Traverse the shared object list looking for dependencies that have 2643 * versions defined within them. 2644 */ 2645 for (APLIST_TRAVERSE(ofl->ofl_sos, idx1, ifl)) { 2646 Half _cnt; 2647 Word cnt = 0; 2648 Vernaux *_vnap, *vnap; 2649 size_t stoff; 2650 2651 if (!(ifl->ifl_flags & FLG_IF_VERNEED)) 2652 continue; 2653 2654 vnd->vn_version = VER_NEED_CURRENT; 2655 2656 (void) st_setstring(dynstr, ifl->ifl_soname, &stoff); 2657 vnd->vn_file = stoff; 2658 2659 _vnap = vnap = (Vernaux *)(vnd + 1); 2660 2661 /* 2662 * Traverse the version index list recording 2663 * each version as a needed dependency. 2664 */ 2665 for (_cnt = 0; _cnt <= ifl->ifl_vercnt; _cnt++) { 2666 Ver_index *vip = &ifl->ifl_verndx[_cnt]; 2667 2668 if (vip->vi_flags & FLG_VER_REFER) { 2669 (void) st_setstring(dynstr, vip->vi_name, 2670 &stoff); 2671 vnap->vna_name = stoff; 2672 2673 if (vip->vi_desc) { 2674 vnap->vna_hash = vip->vi_desc->vd_hash; 2675 vnap->vna_flags = 2676 vip->vi_desc->vd_flags; 2677 } else { 2678 vnap->vna_hash = 0; 2679 vnap->vna_flags = 0; 2680 } 2681 vnap->vna_other = vip->vi_overndx; 2682 2683 /* 2684 * If version A inherits version B, then 2685 * B is implicit in A. It suffices for ld.so.1 2686 * to verify A at runtime and skip B. The 2687 * version normalization process sets the INFO 2688 * flag for the versions we want ld.so.1 to 2689 * skip. 2690 */ 2691 if (vip->vi_flags & VER_FLG_INFO) 2692 vnap->vna_flags |= VER_FLG_INFO; 2693 2694 _vnap = vnap; 2695 vnap++, cnt++; 2696 _vnap->vna_next = 2697 /* LINTED */ 2698 (Word)((uintptr_t)vnap - (uintptr_t)_vnap); 2699 } 2700 } 2701 2702 _vnap->vna_next = 0; 2703 2704 /* 2705 * Record the versions auxiliary array offset and 2706 * the associated dependency count. 2707 */ 2708 /* LINTED */ 2709 vnd->vn_aux = (Word)((uintptr_t)(vnd + 1) - (uintptr_t)vnd); 2710 /* LINTED */ 2711 vnd->vn_cnt = (Half)cnt; 2712 2713 /* 2714 * Record the next versions offset and update the version 2715 * pointer. Remember the previous version offset as the very 2716 * last structures next pointer should be null. 2717 */ 2718 _vnd = vnd; 2719 vnd = (Verneed *)vnap, num++; 2720 /* LINTED */ 2721 _vnd->vn_next = (Word)((uintptr_t)vnd - (uintptr_t)_vnd); 2722 } 2723 _vnd->vn_next = 0; 2724 2725 /* 2726 * Record association on string table section and use the 2727 * `info' field to indicate the number of entries in this 2728 * section. 2729 */ 2730 ofl->ofl_osverneed->os_shdr->sh_link = 2731 /* LINTED */ 2732 (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 2733 ofl->ofl_osverneed->os_shdr->sh_info = num; 2734 2735 return (1); 2736 } 2737 2738 2739 /* 2740 * Update syminfo section. 2741 */ 2742 static uintptr_t 2743 update_osyminfo(Ofl_desc *ofl) 2744 { 2745 Os_desc *symosp, *infosp = ofl->ofl_ossyminfo; 2746 Syminfo *sip = infosp->os_outdata->d_buf; 2747 Shdr *shdr = infosp->os_shdr; 2748 char *strtab; 2749 Aliste idx; 2750 Sym_desc *sdp; 2751 Sfltr_desc *sftp; 2752 2753 if (ofl->ofl_flags & FLG_OF_RELOBJ) { 2754 symosp = ofl->ofl_ossymtab; 2755 strtab = ofl->ofl_osstrtab->os_outdata->d_buf; 2756 } else { 2757 symosp = ofl->ofl_osdynsym; 2758 strtab = ofl->ofl_osdynstr->os_outdata->d_buf; 2759 } 2760 2761 /* LINTED */ 2762 infosp->os_shdr->sh_link = (Word)elf_ndxscn(symosp->os_scn); 2763 if (ofl->ofl_osdynamic) 2764 infosp->os_shdr->sh_info = 2765 /* LINTED */ 2766 (Word)elf_ndxscn(ofl->ofl_osdynamic->os_scn); 2767 2768 /* 2769 * Update any references with the index into the dynamic table. 2770 */ 2771 for (APLIST_TRAVERSE(ofl->ofl_syminfsyms, idx, sdp)) { 2772 Ifl_desc *ifl; 2773 2774 if (sdp->sd_aux && sdp->sd_aux->sa_bindto) 2775 ifl = sdp->sd_aux->sa_bindto; 2776 else 2777 ifl = sdp->sd_file; 2778 sip[sdp->sd_symndx].si_boundto = ifl->ifl_neededndx; 2779 } 2780 2781 /* 2782 * Update any filtee references with the index into the dynamic table. 2783 */ 2784 for (ALIST_TRAVERSE(ofl->ofl_symfltrs, idx, sftp)) { 2785 Dfltr_desc *dftp; 2786 2787 dftp = alist_item(ofl->ofl_dtsfltrs, sftp->sft_idx); 2788 sip[sftp->sft_sdp->sd_symndx].si_boundto = dftp->dft_ndx; 2789 } 2790 2791 /* 2792 * Display debugging information about section. 2793 */ 2794 DBG_CALL(Dbg_syminfo_title(ofl->ofl_lml)); 2795 if (DBG_ENABLED) { 2796 Word _cnt, cnt = shdr->sh_size / shdr->sh_entsize; 2797 Sym *symtab = symosp->os_outdata->d_buf; 2798 Dyn *dyn; 2799 2800 if (ofl->ofl_osdynamic) 2801 dyn = ofl->ofl_osdynamic->os_outdata->d_buf; 2802 else 2803 dyn = NULL; 2804 2805 for (_cnt = 1; _cnt < cnt; _cnt++) { 2806 if (sip[_cnt].si_flags || sip[_cnt].si_boundto) 2807 /* LINTED */ 2808 DBG_CALL(Dbg_syminfo_entry(ofl->ofl_lml, _cnt, 2809 &sip[_cnt], &symtab[_cnt], strtab, dyn)); 2810 } 2811 } 2812 return (1); 2813 } 2814 2815 /* 2816 * Build the output elf header. 2817 */ 2818 static uintptr_t 2819 update_oehdr(Ofl_desc * ofl) 2820 { 2821 Ehdr *ehdr = ofl->ofl_nehdr; 2822 2823 /* 2824 * If an entry point symbol has already been established (refer 2825 * sym_validate()) simply update the elf header entry point with the 2826 * symbols value. If no entry point is defined it will have been filled 2827 * with the start address of the first section within the text segment 2828 * (refer update_outfile()). 2829 */ 2830 if (ofl->ofl_entry) 2831 ehdr->e_entry = 2832 ((Sym_desc *)(ofl->ofl_entry))->sd_sym->st_value; 2833 2834 /* 2835 * Note. it may be necessary to update the `e_flags' field in the 2836 * machine dependent section. 2837 */ 2838 ehdr->e_ident[EI_DATA] = ld_targ.t_m.m_data; 2839 ehdr->e_machine = ofl->ofl_dehdr->e_machine; 2840 ehdr->e_flags = ofl->ofl_dehdr->e_flags; 2841 ehdr->e_version = ofl->ofl_dehdr->e_version; 2842 2843 if (ehdr->e_machine != ld_targ.t_m.m_mach) { 2844 if (ehdr->e_machine != ld_targ.t_m.m_machplus) 2845 return (S_ERROR); 2846 if ((ehdr->e_flags & ld_targ.t_m.m_flagsplus) == 0) 2847 return (S_ERROR); 2848 } 2849 2850 if (ofl->ofl_flags & FLG_OF_SHAROBJ) 2851 ehdr->e_type = ET_DYN; 2852 else if (ofl->ofl_flags & FLG_OF_RELOBJ) 2853 ehdr->e_type = ET_REL; 2854 else 2855 ehdr->e_type = ET_EXEC; 2856 2857 return (1); 2858 } 2859 2860 /* 2861 * Perform move table expansion. 2862 */ 2863 static void 2864 expand_move(Ofl_desc *ofl, Sym_desc *sdp, Move *mvp) 2865 { 2866 Os_desc *osp; 2867 uchar_t *taddr, *taddr0; 2868 Sxword offset; 2869 Half cnt; 2870 uint_t stride; 2871 2872 osp = ofl->ofl_isparexpn->is_osdesc; 2873 offset = sdp->sd_sym->st_value - osp->os_shdr->sh_addr; 2874 2875 taddr0 = taddr = osp->os_outdata->d_buf; 2876 taddr += offset; 2877 taddr = taddr + mvp->m_poffset; 2878 2879 for (cnt = 0; cnt < mvp->m_repeat; cnt++) { 2880 /* LINTED */ 2881 DBG_CALL(Dbg_move_expand(ofl->ofl_lml, mvp, 2882 (Addr)(taddr - taddr0))); 2883 stride = (uint_t)mvp->m_stride + 1; 2884 2885 /* 2886 * Update the target address based upon the move entry size. 2887 * This size was validated in ld_process_move(). 2888 */ 2889 /* LINTED */ 2890 switch (ELF_M_SIZE(mvp->m_info)) { 2891 case 1: 2892 /* LINTED */ 2893 *taddr = (uchar_t)mvp->m_value; 2894 taddr += stride; 2895 break; 2896 case 2: 2897 /* LINTED */ 2898 *((Half *)taddr) = (Half)mvp->m_value; 2899 taddr += 2 * stride; 2900 break; 2901 case 4: 2902 /* LINTED */ 2903 *((Word *)taddr) = (Word)mvp->m_value; 2904 taddr += 4 * stride; 2905 break; 2906 case 8: 2907 /* LINTED */ 2908 *((u_longlong_t *)taddr) = mvp->m_value; 2909 taddr += 8 * stride; 2910 break; 2911 } 2912 } 2913 } 2914 2915 /* 2916 * Update Move sections. 2917 */ 2918 static void 2919 update_move(Ofl_desc *ofl) 2920 { 2921 Word ndx = 0; 2922 ofl_flag_t flags = ofl->ofl_flags; 2923 Move *omvp; 2924 Aliste idx1; 2925 Sym_desc *sdp; 2926 2927 /* 2928 * Determine the index of the symbol table that will be referenced by 2929 * the Move section. 2930 */ 2931 if (OFL_ALLOW_DYNSYM(ofl)) 2932 /* LINTED */ 2933 ndx = (Word) elf_ndxscn(ofl->ofl_osdynsym->os_scn); 2934 else if (!(flags & FLG_OF_STRIP) || (flags & FLG_OF_RELOBJ)) 2935 /* LINTED */ 2936 ndx = (Word) elf_ndxscn(ofl->ofl_ossymtab->os_scn); 2937 2938 /* 2939 * Update sh_link of the Move section, and point to the new Move data. 2940 */ 2941 if (ofl->ofl_osmove) { 2942 ofl->ofl_osmove->os_shdr->sh_link = ndx; 2943 omvp = (Move *)ofl->ofl_osmove->os_outdata->d_buf; 2944 } 2945 2946 /* 2947 * Update symbol entry index 2948 */ 2949 for (APLIST_TRAVERSE(ofl->ofl_parsyms, idx1, sdp)) { 2950 Aliste idx2; 2951 Mv_desc *mdp; 2952 2953 /* 2954 * Expand move table 2955 */ 2956 if (sdp->sd_flags & FLG_SY_PAREXPN) { 2957 const char *str; 2958 2959 if (flags & FLG_OF_STATIC) 2960 str = MSG_INTL(MSG_PSYM_EXPREASON1); 2961 else if (ofl->ofl_flags1 & FLG_OF1_NOPARTI) 2962 str = MSG_INTL(MSG_PSYM_EXPREASON2); 2963 else 2964 str = MSG_INTL(MSG_PSYM_EXPREASON3); 2965 2966 DBG_CALL(Dbg_move_parexpn(ofl->ofl_lml, 2967 sdp->sd_name, str)); 2968 2969 for (ALIST_TRAVERSE(sdp->sd_move, idx2, mdp)) { 2970 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 0, 2971 mdp->md_move, sdp)); 2972 expand_move(ofl, sdp, mdp->md_move); 2973 } 2974 continue; 2975 } 2976 2977 /* 2978 * Process move table 2979 */ 2980 DBG_CALL(Dbg_move_outmove(ofl->ofl_lml, sdp->sd_name)); 2981 2982 for (ALIST_TRAVERSE(sdp->sd_move, idx2, mdp)) { 2983 Move *imvp; 2984 int idx = 1; 2985 Sym *sym; 2986 2987 imvp = mdp->md_move; 2988 sym = sdp->sd_sym; 2989 2990 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 1, imvp, sdp)); 2991 2992 *omvp = *imvp; 2993 if ((flags & FLG_OF_RELOBJ) == 0) { 2994 if (ELF_ST_BIND(sym->st_info) == STB_LOCAL) { 2995 Os_desc *osp = sdp->sd_isc->is_osdesc; 2996 Word ndx = osp->os_identndx; 2997 2998 omvp->m_info = 2999 /* LINTED */ 3000 ELF_M_INFO(ndx, imvp->m_info); 3001 3002 if (ELF_ST_TYPE(sym->st_info) != 3003 STT_SECTION) { 3004 omvp->m_poffset = 3005 sym->st_value - 3006 osp->os_shdr->sh_addr + 3007 imvp->m_poffset; 3008 } 3009 } else { 3010 omvp->m_info = 3011 /* LINTED */ 3012 ELF_M_INFO(sdp->sd_symndx, 3013 imvp->m_info); 3014 } 3015 } else { 3016 Boolean isredloc = FALSE; 3017 3018 if ((ELF_ST_BIND(sym->st_info) == STB_LOCAL) && 3019 (ofl->ofl_flags & FLG_OF_REDLSYM)) 3020 isredloc = TRUE; 3021 3022 if (isredloc && !(sdp->sd_move)) { 3023 Os_desc *osp = sdp->sd_isc->is_osdesc; 3024 Word ndx = osp->os_identndx; 3025 3026 omvp->m_info = 3027 /* LINTED */ 3028 ELF_M_INFO(ndx, imvp->m_info); 3029 3030 omvp->m_poffset += sym->st_value; 3031 } else { 3032 if (isredloc) 3033 DBG_CALL(Dbg_syms_reduce(ofl, 3034 DBG_SYM_REDUCE_RETAIN, 3035 sdp, idx, 3036 ofl->ofl_osmove->os_name)); 3037 3038 omvp->m_info = 3039 /* LINTED */ 3040 ELF_M_INFO(sdp->sd_symndx, 3041 imvp->m_info); 3042 } 3043 } 3044 3045 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 0, omvp, sdp)); 3046 omvp++; 3047 idx++; 3048 } 3049 } 3050 } 3051 3052 /* 3053 * Scan through the SHT_GROUP output sections. Update their sh_link/sh_info 3054 * fields as well as the section contents. 3055 */ 3056 static uintptr_t 3057 update_ogroup(Ofl_desc *ofl) 3058 { 3059 Aliste idx; 3060 Os_desc *osp; 3061 uintptr_t error = 0; 3062 3063 for (APLIST_TRAVERSE(ofl->ofl_osgroups, idx, osp)) { 3064 Is_desc *isp; 3065 Ifl_desc *ifl; 3066 Shdr *shdr = osp->os_shdr; 3067 Sym_desc *sdp; 3068 Xword i, grpcnt; 3069 Word *gdata; 3070 3071 /* 3072 * Since input GROUP sections always create unique 3073 * output GROUP sections - we know there is only one 3074 * item on the list. 3075 */ 3076 isp = ld_os_first_isdesc(osp); 3077 3078 ifl = isp->is_file; 3079 sdp = ifl->ifl_oldndx[isp->is_shdr->sh_info]; 3080 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_ossymtab->os_scn); 3081 shdr->sh_info = sdp->sd_symndx; 3082 3083 /* 3084 * Scan through the group data section and update 3085 * all of the links to new values. 3086 */ 3087 grpcnt = shdr->sh_size / shdr->sh_entsize; 3088 gdata = (Word *)osp->os_outdata->d_buf; 3089 3090 for (i = 1; i < grpcnt; i++) { 3091 Os_desc *_osp; 3092 Is_desc *_isp = ifl->ifl_isdesc[gdata[i]]; 3093 3094 /* 3095 * If the referenced section didn't make it to the 3096 * output file - just zero out the entry. 3097 */ 3098 if ((_osp = _isp->is_osdesc) == NULL) 3099 gdata[i] = 0; 3100 else 3101 gdata[i] = (Word)elf_ndxscn(_osp->os_scn); 3102 } 3103 } 3104 return (error); 3105 } 3106 3107 static void 3108 update_ostrtab(Os_desc *osp, Str_tbl *stp, uint_t extra) 3109 { 3110 Elf_Data *data; 3111 3112 if (osp == NULL) 3113 return; 3114 3115 data = osp->os_outdata; 3116 assert(data->d_size == (st_getstrtab_sz(stp) + extra)); 3117 (void) st_setstrbuf(stp, data->d_buf, data->d_size - extra); 3118 /* If leaving an extra hole at the end, zero it */ 3119 if (extra > 0) 3120 (void) memset((char *)data->d_buf + data->d_size - extra, 3121 0x0, extra); 3122 } 3123 3124 /* 3125 * Translate the shdr->sh_{link, info} from its input section value to that 3126 * of the corresponding shdr->sh_{link, info} output section value. 3127 */ 3128 static Word 3129 translate_link(Ofl_desc *ofl, Os_desc *osp, Word link, const char *msg) 3130 { 3131 Is_desc *isp; 3132 Ifl_desc *ifl; 3133 3134 /* 3135 * Don't translate the special section numbers. 3136 */ 3137 if (link >= SHN_LORESERVE) 3138 return (link); 3139 3140 /* 3141 * Does this output section translate back to an input file. If not 3142 * then there is no translation to do. In this case we will assume that 3143 * if sh_link has a value, it's the right value. 3144 */ 3145 isp = ld_os_first_isdesc(osp); 3146 if ((ifl = isp->is_file) == NULL) 3147 return (link); 3148 3149 /* 3150 * Sanity check to make sure that the sh_{link, info} value 3151 * is within range for the input file. 3152 */ 3153 if (link >= ifl->ifl_shnum) { 3154 eprintf(ofl->ofl_lml, ERR_WARNING, msg, ifl->ifl_name, 3155 EC_WORD(isp->is_scnndx), isp->is_name, EC_XWORD(link)); 3156 return (link); 3157 } 3158 3159 /* 3160 * Follow the link to the input section. 3161 */ 3162 if ((isp = ifl->ifl_isdesc[link]) == NULL) 3163 return (0); 3164 if ((osp = isp->is_osdesc) == NULL) 3165 return (0); 3166 3167 /* LINTED */ 3168 return ((Word)elf_ndxscn(osp->os_scn)); 3169 } 3170 3171 /* 3172 * Having created all of the necessary sections, segments, and associated 3173 * headers, fill in the program headers and update any other data in the 3174 * output image. Some general rules: 3175 * 3176 * - If an interpreter is required always generate a PT_PHDR entry as 3177 * well. It is this entry that triggers the kernel into passing the 3178 * interpreter an aux vector instead of just a file descriptor. 3179 * 3180 * - When generating an image that will be interpreted (ie. a dynamic 3181 * executable, a shared object, or a static executable that has been 3182 * provided with an interpreter - weird, but possible), make the initial 3183 * loadable segment include both the ehdr and phdr[]. Both of these 3184 * tables are used by the interpreter therefore it seems more intuitive 3185 * to explicitly defined them as part of the mapped image rather than 3186 * relying on page rounding by the interpreter to allow their access. 3187 * 3188 * - When generating a static image that does not require an interpreter 3189 * have the first loadable segment indicate the address of the first 3190 * .section as the start address (things like /kernel/unix and ufsboot 3191 * expect this behavior). 3192 */ 3193 uintptr_t 3194 ld_update_outfile(Ofl_desc *ofl) 3195 { 3196 Addr size, etext, vaddr; 3197 Sg_desc *sgp; 3198 Sg_desc *dtracesgp = NULL, *capsgp = NULL, *intpsgp = NULL; 3199 Os_desc *osp; 3200 int phdrndx = 0, segndx = -1, secndx, intppndx, intpsndx; 3201 int dtracepndx, dtracesndx, cappndx, capsndx; 3202 Ehdr *ehdr = ofl->ofl_nehdr; 3203 Shdr *hshdr; 3204 Phdr *_phdr = NULL; 3205 Word phdrsz = (ehdr->e_phnum * ehdr->e_phentsize), shscnndx; 3206 ofl_flag_t flags = ofl->ofl_flags; 3207 Word ehdrsz = ehdr->e_ehsize; 3208 Boolean nobits; 3209 Off offset; 3210 Aliste idx1; 3211 3212 /* 3213 * Initialize the starting address for the first segment. Executables 3214 * have different starting addresses depending upon the target ABI, 3215 * where as shared objects have a starting address of 0. If this is 3216 * a 64-bit executable that is being constructed to run in a restricted 3217 * address space, use an alternative origin that will provide more free 3218 * address space for the the eventual process. 3219 */ 3220 if (ofl->ofl_flags & FLG_OF_EXEC) { 3221 #if defined(_ELF64) 3222 if (ofl->ofl_sfcap_1 & SF1_SUNW_ADDR32) 3223 vaddr = ld_targ.t_m.m_segm_aorigin; 3224 else 3225 #endif 3226 vaddr = ld_targ.t_m.m_segm_origin; 3227 } else 3228 vaddr = 0; 3229 3230 /* 3231 * Loop through the segment descriptors and pick out what we need. 3232 */ 3233 DBG_CALL(Dbg_seg_title(ofl->ofl_lml)); 3234 for (APLIST_TRAVERSE(ofl->ofl_segs, idx1, sgp)) { 3235 Phdr *phdr = &(sgp->sg_phdr); 3236 Xword p_align; 3237 Aliste idx2; 3238 3239 segndx++; 3240 3241 /* 3242 * If an interpreter is required generate a PT_INTERP and 3243 * PT_PHDR program header entry. The PT_PHDR entry describes 3244 * the program header table itself. This information will be 3245 * passed via the aux vector to the interpreter (ld.so.1). 3246 * The program header array is actually part of the first 3247 * loadable segment (and the PT_PHDR entry is the first entry), 3248 * therefore its virtual address isn't known until the first 3249 * loadable segment is processed. 3250 */ 3251 if (phdr->p_type == PT_PHDR) { 3252 if (ofl->ofl_osinterp) { 3253 phdr->p_offset = ehdr->e_phoff; 3254 phdr->p_filesz = phdr->p_memsz = phdrsz; 3255 3256 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3257 ofl->ofl_phdr[phdrndx++] = *phdr; 3258 } 3259 continue; 3260 } 3261 if (phdr->p_type == PT_INTERP) { 3262 if (ofl->ofl_osinterp) { 3263 intpsgp = sgp; 3264 intpsndx = segndx; 3265 intppndx = phdrndx++; 3266 } 3267 continue; 3268 } 3269 3270 /* 3271 * If we are creating a PT_SUNWDTRACE segment, remember where 3272 * the program header is. The header values are assigned after 3273 * update_osym() has completed and the symbol table addresses 3274 * have been udpated. 3275 */ 3276 if (phdr->p_type == PT_SUNWDTRACE) { 3277 if ((ofl->ofl_dtracesym) && 3278 ((flags & FLG_OF_RELOBJ) == 0)) { 3279 dtracesgp = sgp; 3280 dtracesndx = segndx; 3281 dtracepndx = phdrndx++; 3282 } 3283 continue; 3284 } 3285 3286 /* 3287 * If a hardware/software capabilities section is required, 3288 * generate the PT_SUNWCAP header. Note, as this comes before 3289 * the first loadable segment, we don't yet know its real 3290 * virtual address. This is updated later. 3291 */ 3292 if (phdr->p_type == PT_SUNWCAP) { 3293 if (ofl->ofl_oscap) { 3294 capsgp = sgp; 3295 capsndx = segndx; 3296 cappndx = phdrndx++; 3297 } 3298 continue; 3299 } 3300 3301 /* 3302 * As the dynamic program header occurs after the loadable 3303 * headers in the segment descriptor table, all the address 3304 * information for the .dynamic output section will have been 3305 * figured out by now. 3306 */ 3307 if (phdr->p_type == PT_DYNAMIC) { 3308 if (OFL_ALLOW_DYNSYM(ofl)) { 3309 Shdr *shdr = ofl->ofl_osdynamic->os_shdr; 3310 3311 phdr->p_vaddr = shdr->sh_addr; 3312 phdr->p_offset = shdr->sh_offset; 3313 phdr->p_filesz = shdr->sh_size; 3314 phdr->p_flags = ld_targ.t_m.m_dataseg_perm; 3315 3316 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3317 ofl->ofl_phdr[phdrndx++] = *phdr; 3318 } 3319 continue; 3320 } 3321 3322 /* 3323 * As the unwind (.eh_frame_hdr) program header occurs after 3324 * the loadable headers in the segment descriptor table, all 3325 * the address information for the .eh_frame output section 3326 * will have been figured out by now. 3327 */ 3328 if (phdr->p_type == PT_SUNW_UNWIND) { 3329 Shdr *shdr; 3330 3331 if (ofl->ofl_unwindhdr == NULL) 3332 continue; 3333 3334 shdr = ofl->ofl_unwindhdr->os_shdr; 3335 3336 phdr->p_flags = PF_R; 3337 phdr->p_vaddr = shdr->sh_addr; 3338 phdr->p_memsz = shdr->sh_size; 3339 phdr->p_filesz = shdr->sh_size; 3340 phdr->p_offset = shdr->sh_offset; 3341 phdr->p_align = shdr->sh_addralign; 3342 phdr->p_paddr = 0; 3343 ofl->ofl_phdr[phdrndx++] = *phdr; 3344 continue; 3345 } 3346 3347 /* 3348 * As the TLS program header occurs after the loadable 3349 * headers in the segment descriptor table, all the address 3350 * information for the .tls output section will have been 3351 * figured out by now. 3352 */ 3353 if (phdr->p_type == PT_TLS) { 3354 Os_desc *tlsosp; 3355 Shdr *firstshdr = NULL, *lastfileshdr = NULL; 3356 Shdr *lastshdr; 3357 Aliste idx; 3358 3359 if (ofl->ofl_ostlsseg == NULL) 3360 continue; 3361 3362 /* 3363 * Scan through the sections that have contributed TLS. 3364 * Remember the first and last so as to determine the 3365 * TLS memory size requirement. Remember the last 3366 * non-nobits section to determine the TLS data 3367 * contribution, which determines the TLS file size. 3368 */ 3369 for (APLIST_TRAVERSE(ofl->ofl_ostlsseg, idx, tlsosp)) { 3370 Shdr *tlsshdr = tlsosp->os_shdr; 3371 3372 if (firstshdr == NULL) 3373 firstshdr = tlsshdr; 3374 if (tlsshdr->sh_type != SHT_NOBITS) 3375 lastfileshdr = tlsshdr; 3376 lastshdr = tlsshdr; 3377 } 3378 3379 phdr->p_flags = PF_R | PF_W; 3380 phdr->p_vaddr = firstshdr->sh_addr; 3381 phdr->p_offset = firstshdr->sh_offset; 3382 phdr->p_align = firstshdr->sh_addralign; 3383 3384 if (lastfileshdr) 3385 phdr->p_filesz = lastfileshdr->sh_offset + 3386 lastfileshdr->sh_size - phdr->p_offset; 3387 else 3388 phdr->p_filesz = 0; 3389 3390 phdr->p_memsz = lastshdr->sh_offset + 3391 lastshdr->sh_size - phdr->p_offset; 3392 3393 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3394 ofl->ofl_phdr[phdrndx] = *phdr; 3395 ofl->ofl_tlsphdr = &ofl->ofl_phdr[phdrndx++]; 3396 continue; 3397 } 3398 3399 /* 3400 * If this is an empty segment declaration, it will occur after 3401 * all other loadable segments. As empty segments can be 3402 * defind with fixed addresses, make sure that no loadable 3403 * segments overlap. This might occur as the object evolves 3404 * and the loadable segments grow, thus encroaching upon an 3405 * existing segment reservation. 3406 * 3407 * Segments are only created for dynamic objects, thus this 3408 * checking can be skipped when building a relocatable object. 3409 */ 3410 if (!(flags & FLG_OF_RELOBJ) && 3411 (sgp->sg_flags & FLG_SG_EMPTY)) { 3412 int i; 3413 Addr v_e; 3414 3415 vaddr = phdr->p_vaddr; 3416 phdr->p_memsz = sgp->sg_length; 3417 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3418 ofl->ofl_phdr[phdrndx++] = *phdr; 3419 3420 if (phdr->p_type != PT_LOAD) 3421 continue; 3422 3423 v_e = vaddr + phdr->p_memsz; 3424 3425 /* 3426 * Check overlaps 3427 */ 3428 for (i = 0; i < phdrndx - 1; i++) { 3429 Addr p_s = (ofl->ofl_phdr[i]).p_vaddr; 3430 Addr p_e; 3431 3432 if ((ofl->ofl_phdr[i]).p_type != PT_LOAD) 3433 continue; 3434 3435 p_e = p_s + (ofl->ofl_phdr[i]).p_memsz; 3436 if (((p_s <= vaddr) && (p_e > vaddr)) || 3437 ((vaddr <= p_s) && (v_e > p_s))) 3438 eprintf(ofl->ofl_lml, ERR_WARNING, 3439 MSG_INTL(MSG_UPD_SEGOVERLAP), 3440 ofl->ofl_name, EC_ADDR(p_e), 3441 sgp->sg_name, EC_ADDR(vaddr)); 3442 } 3443 continue; 3444 } 3445 3446 /* 3447 * Having processed any of the special program headers any 3448 * remaining headers will be built to express individual 3449 * segments. Segments are only built if they have output 3450 * section descriptors associated with them (ie. some form of 3451 * input section has been matched to this segment). 3452 */ 3453 if (sgp->sg_osdescs == NULL) 3454 continue; 3455 3456 /* 3457 * Determine the segments offset and size from the section 3458 * information provided from elf_update(). 3459 * Allow for multiple NOBITS sections. 3460 */ 3461 osp = sgp->sg_osdescs->apl_data[0]; 3462 hshdr = osp->os_shdr; 3463 3464 phdr->p_filesz = 0; 3465 phdr->p_memsz = 0; 3466 phdr->p_offset = offset = hshdr->sh_offset; 3467 3468 nobits = ((hshdr->sh_type == SHT_NOBITS) && 3469 ((sgp->sg_flags & FLG_SG_PHREQ) == 0)); 3470 3471 for (APLIST_TRAVERSE(sgp->sg_osdescs, idx2, osp)) { 3472 Shdr *shdr = osp->os_shdr; 3473 3474 p_align = 0; 3475 if (shdr->sh_addralign > p_align) 3476 p_align = shdr->sh_addralign; 3477 3478 offset = (Off)S_ROUND(offset, shdr->sh_addralign); 3479 offset += shdr->sh_size; 3480 3481 if (shdr->sh_type != SHT_NOBITS) { 3482 if (nobits) { 3483 eprintf(ofl->ofl_lml, ERR_FATAL, 3484 MSG_INTL(MSG_UPD_NOBITS)); 3485 return (S_ERROR); 3486 } 3487 phdr->p_filesz = offset - phdr->p_offset; 3488 } else if ((sgp->sg_flags & FLG_SG_PHREQ) == 0) 3489 nobits = TRUE; 3490 } 3491 phdr->p_memsz = offset - hshdr->sh_offset; 3492 3493 /* 3494 * If this is the first loadable segment of a dynamic object, 3495 * or an interpreter has been specified (a static object built 3496 * with an interpreter will still be given a PT_HDR entry), then 3497 * compensate for the elf header and program header array. Both 3498 * of these are actually part of the loadable segment as they 3499 * may be inspected by the interpreter. Adjust the segments 3500 * size and offset accordingly. 3501 */ 3502 if ((_phdr == NULL) && (phdr->p_type == PT_LOAD) && 3503 ((ofl->ofl_osinterp) || (flags & FLG_OF_DYNAMIC)) && 3504 (!(ofl->ofl_dtflags_1 & DF_1_NOHDR))) { 3505 size = (Addr)S_ROUND((phdrsz + ehdrsz), 3506 hshdr->sh_addralign); 3507 phdr->p_offset -= size; 3508 phdr->p_filesz += size; 3509 phdr->p_memsz += size; 3510 } 3511 3512 /* 3513 * If a segment size symbol is required (specified via a 3514 * mapfile) update its value. 3515 */ 3516 if (sgp->sg_sizesym != NULL) 3517 sgp->sg_sizesym->sd_sym->st_value = phdr->p_memsz; 3518 3519 /* 3520 * If no file content has been assigned to this segment (it 3521 * only contains no-bits sections), then reset the offset for 3522 * consistency. 3523 */ 3524 if (phdr->p_filesz == 0) 3525 phdr->p_offset = 0; 3526 3527 /* 3528 * If a virtual address has been specified for this segment 3529 * (presumably from a mapfile) use it and make sure the 3530 * previous segment does not run into this segment. 3531 */ 3532 if (phdr->p_type == PT_LOAD) { 3533 if ((sgp->sg_flags & FLG_SG_VADDR)) { 3534 if (_phdr && (vaddr > phdr->p_vaddr) && 3535 (phdr->p_type == PT_LOAD)) 3536 eprintf(ofl->ofl_lml, ERR_WARNING, 3537 MSG_INTL(MSG_UPD_SEGOVERLAP), 3538 ofl->ofl_name, EC_ADDR(vaddr), 3539 sgp->sg_name, 3540 EC_ADDR(phdr->p_vaddr)); 3541 vaddr = phdr->p_vaddr; 3542 phdr->p_align = 0; 3543 } else { 3544 vaddr = phdr->p_vaddr = 3545 (Addr)S_ROUND(vaddr, phdr->p_align); 3546 } 3547 } 3548 3549 /* 3550 * Adjust the address offset and p_align if needed. 3551 */ 3552 if (((sgp->sg_flags & FLG_SG_VADDR) == 0) && 3553 ((ofl->ofl_dtflags_1 & DF_1_NOHDR) == 0)) { 3554 if (phdr->p_align != 0) 3555 vaddr += phdr->p_offset % phdr->p_align; 3556 else 3557 vaddr += phdr->p_offset; 3558 phdr->p_vaddr = vaddr; 3559 } 3560 3561 /* 3562 * If an interpreter is required set the virtual address of the 3563 * PT_PHDR program header now that we know the virtual address 3564 * of the loadable segment that contains it. Update the 3565 * PT_SUNWCAP header similarly. 3566 */ 3567 if ((_phdr == NULL) && (phdr->p_type == PT_LOAD)) { 3568 _phdr = phdr; 3569 3570 if ((ofl->ofl_dtflags_1 & DF_1_NOHDR) == 0) { 3571 if (ofl->ofl_osinterp) 3572 ofl->ofl_phdr[0].p_vaddr = 3573 vaddr + ehdrsz; 3574 3575 /* 3576 * Finally, if we're creating a dynamic object 3577 * (or a static object in which an interpreter 3578 * is specified) update the vaddr to reflect 3579 * the address of the first section within this 3580 * segment. 3581 */ 3582 if ((ofl->ofl_osinterp) || 3583 (flags & FLG_OF_DYNAMIC)) 3584 vaddr += size; 3585 } else { 3586 /* 3587 * If the DF_1_NOHDR flag was set, and an 3588 * interpreter is being generated, the PT_PHDR 3589 * will not be part of any loadable segment. 3590 */ 3591 if (ofl->ofl_osinterp) { 3592 ofl->ofl_phdr[0].p_vaddr = 0; 3593 ofl->ofl_phdr[0].p_memsz = 0; 3594 ofl->ofl_phdr[0].p_flags = 0; 3595 } 3596 } 3597 } 3598 3599 /* 3600 * Ensure the ELF entry point defaults to zero. Typically, this 3601 * value is overridden in update_oehdr() to one of the standard 3602 * entry points. Historically, this default was set to the 3603 * address of first executable section, but this has since been 3604 * found to be more confusing than it is helpful. 3605 */ 3606 ehdr->e_entry = 0; 3607 3608 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3609 3610 /* 3611 * Traverse the output section descriptors for this segment so 3612 * that we can update the section headers addresses. We've 3613 * calculated the virtual address of the initial section within 3614 * this segment, so each successive section can be calculated 3615 * based on their offsets from each other. 3616 */ 3617 secndx = 0; 3618 hshdr = 0; 3619 for (APLIST_TRAVERSE(sgp->sg_osdescs, idx2, osp)) { 3620 Shdr *shdr = osp->os_shdr; 3621 3622 if (shdr->sh_link) 3623 shdr->sh_link = translate_link(ofl, osp, 3624 shdr->sh_link, MSG_INTL(MSG_FIL_INVSHLINK)); 3625 3626 if (shdr->sh_info && (shdr->sh_flags & SHF_INFO_LINK)) 3627 shdr->sh_info = translate_link(ofl, osp, 3628 shdr->sh_info, MSG_INTL(MSG_FIL_INVSHINFO)); 3629 3630 if (!(flags & FLG_OF_RELOBJ) && 3631 (phdr->p_type == PT_LOAD)) { 3632 if (hshdr) 3633 vaddr += (shdr->sh_offset - 3634 hshdr->sh_offset); 3635 3636 shdr->sh_addr = vaddr; 3637 hshdr = shdr; 3638 } 3639 3640 DBG_CALL(Dbg_seg_os(ofl, osp, secndx)); 3641 secndx++; 3642 } 3643 3644 /* 3645 * Establish the virtual address of the end of the last section 3646 * in this segment so that the next segments offset can be 3647 * calculated from this. 3648 */ 3649 if (hshdr) 3650 vaddr += hshdr->sh_size; 3651 3652 /* 3653 * Output sections for this segment complete. Adjust the 3654 * virtual offset for the last sections size, and make sure we 3655 * haven't exceeded any maximum segment length specification. 3656 */ 3657 if ((sgp->sg_length != 0) && (sgp->sg_length < phdr->p_memsz)) { 3658 eprintf(ofl->ofl_lml, ERR_FATAL, 3659 MSG_INTL(MSG_UPD_LARGSIZE), ofl->ofl_name, 3660 sgp->sg_name, EC_XWORD(phdr->p_memsz), 3661 EC_XWORD(sgp->sg_length)); 3662 return (S_ERROR); 3663 } 3664 3665 if (phdr->p_type == PT_NOTE) { 3666 phdr->p_vaddr = 0; 3667 phdr->p_paddr = 0; 3668 phdr->p_align = 0; 3669 phdr->p_memsz = 0; 3670 } 3671 3672 if ((phdr->p_type != PT_NULL) && !(flags & FLG_OF_RELOBJ)) 3673 ofl->ofl_phdr[phdrndx++] = *phdr; 3674 } 3675 3676 /* 3677 * Update any new output sections. When building the initial output 3678 * image, a number of sections were created but left uninitialized (eg. 3679 * .dynsym, .dynstr, .symtab, .symtab, etc.). Here we update these 3680 * sections with the appropriate data. Other sections may still be 3681 * modified via reloc_process(). 3682 * 3683 * Copy the interpreter name into the .interp section. 3684 */ 3685 if (ofl->ofl_interp) 3686 (void) strcpy((char *)ofl->ofl_osinterp->os_outdata->d_buf, 3687 ofl->ofl_interp); 3688 3689 /* 3690 * Update the .shstrtab, .strtab and .dynstr sections. 3691 */ 3692 update_ostrtab(ofl->ofl_osshstrtab, ofl->ofl_shdrsttab, 0); 3693 update_ostrtab(ofl->ofl_osstrtab, ofl->ofl_strtab, 0); 3694 update_ostrtab(ofl->ofl_osdynstr, ofl->ofl_dynstrtab, DYNSTR_EXTRA_PAD); 3695 3696 /* 3697 * Build any output symbol tables, the symbols information is copied 3698 * and updated into the new output image. 3699 */ 3700 if ((etext = update_osym(ofl)) == (Addr)S_ERROR) 3701 return (S_ERROR); 3702 3703 /* 3704 * If we have an PT_INTERP phdr, update it now from the associated 3705 * section information. 3706 */ 3707 if (intpsgp) { 3708 Phdr *phdr = &(intpsgp->sg_phdr); 3709 Shdr *shdr = ofl->ofl_osinterp->os_shdr; 3710 3711 phdr->p_vaddr = shdr->sh_addr; 3712 phdr->p_offset = shdr->sh_offset; 3713 phdr->p_memsz = phdr->p_filesz = shdr->sh_size; 3714 phdr->p_flags = PF_R; 3715 3716 DBG_CALL(Dbg_seg_entry(ofl, intpsndx, intpsgp)); 3717 ofl->ofl_phdr[intppndx] = *phdr; 3718 } 3719 3720 /* 3721 * If we have a PT_SUNWDTRACE phdr, update it now with the address of 3722 * the symbol. It's only now been updated via update_sym(). 3723 */ 3724 if (dtracesgp && ofl->ofl_dtracesym) { 3725 Phdr *aphdr, *phdr = &(dtracesgp->sg_phdr); 3726 Sym_desc *sdp = ofl->ofl_dtracesym; 3727 3728 phdr->p_vaddr = sdp->sd_sym->st_value; 3729 phdr->p_memsz = sdp->sd_sym->st_size; 3730 3731 /* 3732 * Take permisions of the segment the symbol is associated with. 3733 */ 3734 aphdr = &sdp->sd_isc->is_osdesc->os_sgdesc->sg_phdr; 3735 assert(aphdr); 3736 phdr->p_flags = aphdr->p_flags; 3737 3738 DBG_CALL(Dbg_seg_entry(ofl, dtracesndx, dtracesgp)); 3739 ofl->ofl_phdr[dtracepndx] = *phdr; 3740 } 3741 3742 /* 3743 * If we have a PT_SUNWCAP phdr, update it now from the associated 3744 * section information. 3745 */ 3746 if (capsgp && ofl->ofl_oscap) { 3747 Phdr *phdr = &(capsgp->sg_phdr); 3748 Shdr *shdr = ofl->ofl_oscap->os_shdr; 3749 3750 phdr->p_vaddr = shdr->sh_addr; 3751 phdr->p_offset = shdr->sh_offset; 3752 phdr->p_memsz = phdr->p_filesz = shdr->sh_size; 3753 phdr->p_flags = PF_R; 3754 3755 DBG_CALL(Dbg_seg_entry(ofl, capsndx, capsgp)); 3756 ofl->ofl_phdr[cappndx] = *phdr; 3757 } 3758 3759 /* 3760 * Update the GROUP sections. 3761 */ 3762 if (update_ogroup(ofl) == S_ERROR) 3763 return (S_ERROR); 3764 3765 /* 3766 * Update Move Table. 3767 */ 3768 if (ofl->ofl_osmove || ofl->ofl_isparexpn) 3769 update_move(ofl); 3770 3771 /* 3772 * Build any output headers, version information, dynamic structure and 3773 * syminfo structure. 3774 */ 3775 if (update_oehdr(ofl) == S_ERROR) 3776 return (S_ERROR); 3777 if (!(flags & FLG_OF_NOVERSEC)) { 3778 if ((flags & FLG_OF_VERDEF) && 3779 (update_overdef(ofl) == S_ERROR)) 3780 return (S_ERROR); 3781 if ((flags & FLG_OF_VERNEED) && 3782 (update_overneed(ofl) == S_ERROR)) 3783 return (S_ERROR); 3784 if ((flags & (FLG_OF_VERNEED | FLG_OF_VERDEF)) && 3785 (update_oversym(ofl) == S_ERROR)) 3786 return (S_ERROR); 3787 } 3788 if (flags & FLG_OF_DYNAMIC) { 3789 if (update_odynamic(ofl) == S_ERROR) 3790 return (S_ERROR); 3791 if (ofl->ofl_ossyminfo) 3792 if (update_osyminfo(ofl) == S_ERROR) 3793 return (S_ERROR); 3794 } 3795 3796 /* 3797 * Sanity test: First and last data byte of a string table 3798 * must be NULL. 3799 */ 3800 assert((ofl->ofl_osshstrtab == NULL) || 3801 (*((char *)ofl->ofl_osshstrtab->os_outdata->d_buf) == '\0')); 3802 assert((ofl->ofl_osshstrtab == NULL) || 3803 (*(((char *)ofl->ofl_osshstrtab->os_outdata->d_buf) + 3804 ofl->ofl_osshstrtab->os_outdata->d_size - 1) == '\0')); 3805 3806 assert((ofl->ofl_osstrtab == NULL) || 3807 (*((char *)ofl->ofl_osstrtab->os_outdata->d_buf) == '\0')); 3808 assert((ofl->ofl_osstrtab == NULL) || 3809 (*(((char *)ofl->ofl_osstrtab->os_outdata->d_buf) + 3810 ofl->ofl_osstrtab->os_outdata->d_size - 1) == '\0')); 3811 3812 assert((ofl->ofl_osdynstr == NULL) || 3813 (*((char *)ofl->ofl_osdynstr->os_outdata->d_buf) == '\0')); 3814 assert((ofl->ofl_osdynstr == NULL) || 3815 (*(((char *)ofl->ofl_osdynstr->os_outdata->d_buf) + 3816 ofl->ofl_osdynstr->os_outdata->d_size - DYNSTR_EXTRA_PAD - 1) == 3817 '\0')); 3818 3819 /* 3820 * Emit Strtab diagnostics. 3821 */ 3822 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osshstrtab, 3823 ofl->ofl_shdrsttab)); 3824 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osstrtab, 3825 ofl->ofl_strtab)); 3826 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osdynstr, 3827 ofl->ofl_dynstrtab)); 3828 3829 /* 3830 * Initialize the section headers string table index within the elf 3831 * header. 3832 */ 3833 /* LINTED */ 3834 if ((shscnndx = elf_ndxscn(ofl->ofl_osshstrtab->os_scn)) < 3835 SHN_LORESERVE) { 3836 ofl->ofl_nehdr->e_shstrndx = 3837 /* LINTED */ 3838 (Half)shscnndx; 3839 } else { 3840 /* 3841 * If the STRTAB section index doesn't fit into 3842 * e_shstrndx, then we store it in 'shdr[0].st_link'. 3843 */ 3844 Elf_Scn *scn; 3845 Shdr *shdr0; 3846 3847 if ((scn = elf_getscn(ofl->ofl_elf, 0)) == NULL) { 3848 eprintf(ofl->ofl_lml, ERR_ELF, 3849 MSG_INTL(MSG_ELF_GETSCN), ofl->ofl_name); 3850 return (S_ERROR); 3851 } 3852 if ((shdr0 = elf_getshdr(scn)) == NULL) { 3853 eprintf(ofl->ofl_lml, ERR_ELF, 3854 MSG_INTL(MSG_ELF_GETSHDR), ofl->ofl_name); 3855 return (S_ERROR); 3856 } 3857 ofl->ofl_nehdr->e_shstrndx = SHN_XINDEX; 3858 shdr0->sh_link = shscnndx; 3859 } 3860 3861 return ((uintptr_t)etext); 3862 } 3863