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 2008 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 /* 32 * Update the new output file image, perform virtual address, offset and 33 * displacement calculations on the program headers and sections headers, 34 * and generate any new output section information. 35 */ 36 37 #define ELF_TARGET_AMD64 38 39 #include <stdio.h> 40 #include <string.h> 41 #include <unistd.h> 42 #include <debug.h> 43 #include "msg.h" 44 #include "_libld.h" 45 46 /* 47 * Comparison routine used by qsort() for sorting of the global symbol list 48 * based off of the hashbuckets the symbol will eventually be deposited in. 49 */ 50 static int 51 sym_hash_compare(Sym_s_list * s1, Sym_s_list * s2) 52 { 53 return (s1->sl_hval - s2->sl_hval); 54 } 55 56 /* 57 * Comparison routine used by qsort() for sorting of dyn[sym|tls]sort section 58 * indices based on the address of the symbols they reference. The 59 * use of the global dynsort_compare_syms variable is needed because 60 * we need to examine the symbols the indices reference. It is safe, because 61 * the linker is single threaded. 62 */ 63 Sym *dynsort_compare_syms; 64 65 static int 66 dynsort_compare(const void *idx1, const void *idx2) 67 { 68 Sym *s1 = dynsort_compare_syms + *((const Word *) idx1); 69 Sym *s2 = dynsort_compare_syms + *((const Word *) idx2); 70 71 /* 72 * Note: the logical computation for this is 73 * (st_value1 - st_value2) 74 * However, that is only correct if the address type is smaller 75 * than a pointer. Writing it this way makes it immune to the 76 * class (32 or 64-bit) of the linker. 77 */ 78 return ((s1->st_value < s2->st_value) ? -1 : 79 (s1->st_value > s2->st_value)); 80 } 81 82 83 /* 84 * Scan the sorted symbols, and issue warnings if there are any duplicate 85 * values in the list. We only do this if -zverbose is set, or we are 86 * running with LD_DEBUG defined 87 * 88 * entry: 89 * ofl - Output file descriptor 90 * ldynsym - Pointer to start of .SUNW_ldynsym section that the 91 * sort section indexes reference. 92 * symsort - Pointer to start of .SUNW_dynsymsort or .SUNW_dyntlssort 93 * section. 94 * n - # of indices in symsort array 95 * secname - Name of the symsort section. 96 * 97 * exit: 98 * If the symsort section contains indexes to more than one 99 * symbol with the same address value, a warning is issued. 100 */ 101 static void 102 dynsort_dupwarn(Ofl_desc *ofl, Sym *ldynsym, const char *str, 103 Word *symsort, Word n, const char *secname) 104 { 105 int zverbose = (ofl->ofl_flags & FLG_OF_VERBOSE) != 0; 106 Word ndx, cmp_ndx; 107 Addr addr, cmp_addr; 108 109 /* Nothing to do if -zverbose or LD_DEBUG are not active */ 110 if (!(zverbose || DBG_ENABLED)) 111 return; 112 113 cmp_ndx = 0; 114 cmp_addr = ldynsym[symsort[cmp_ndx]].st_value; 115 for (ndx = 1; ndx < n; ndx++) { 116 addr = ldynsym[symsort[ndx]].st_value; 117 if (cmp_addr == addr) { 118 if (zverbose) 119 eprintf(ofl->ofl_lml, ERR_WARNING, 120 MSG_INTL(MSG_SYM_DUPSORTADDR), secname, 121 str + ldynsym[symsort[cmp_ndx]].st_name, 122 str + ldynsym[symsort[ndx]].st_name, 123 EC_ADDR(addr)); 124 DBG_CALL(Dbg_syms_dup_sort_addr(ofl->ofl_lml, secname, 125 str + ldynsym[symsort[cmp_ndx]].st_name, 126 str + ldynsym[symsort[ndx]].st_name, 127 EC_ADDR(addr))); 128 } else { /* Not a dup. Move reference up */ 129 cmp_ndx = ndx; 130 cmp_addr = addr; 131 } 132 } 133 } 134 135 136 /* 137 * Build and update any output symbol tables. Here we work on all the symbol 138 * tables at once to reduce the duplication of symbol and string manipulation. 139 * Symbols and their associated strings are copied from the read-only input 140 * file images to the output image and their values and index's updated in the 141 * output image. 142 */ 143 static Addr 144 update_osym(Ofl_desc *ofl) 145 { 146 /* 147 * There are several places in this function where we wish 148 * to insert a symbol index to the combined .SUNW_ldynsym/.dynsym 149 * symbol table into one of the two sort sections (.SUNW_dynsymsort 150 * or .SUNW_dyntlssort), if that symbol has the right attributes. 151 * This macro is used to generate the necessary code from a single 152 * specification. 153 * 154 * entry: 155 * _sdp, _sym, _type - As per DYNSORT_COUNT. See _libld.h 156 * _sym_ndx - Index that _sym will have in the combined 157 * .SUNW_ldynsym/.dynsym symbol table. 158 */ 159 #define ADD_TO_DYNSORT(_sdp, _sym, _type, _sym_ndx) \ 160 { \ 161 Word *_dynsort_arr, *_dynsort_ndx; \ 162 \ 163 if (dynsymsort_symtype[_type]) { \ 164 _dynsort_arr = dynsymsort; \ 165 _dynsort_ndx = &dynsymsort_ndx; \ 166 } else if (_type == STT_TLS) { \ 167 _dynsort_arr = dyntlssort; \ 168 _dynsort_ndx = &dyntlssort_ndx; \ 169 } else { \ 170 _dynsort_arr = NULL; \ 171 } \ 172 if ((_dynsort_arr != NULL) && DYNSORT_TEST_ATTR(_sdp, _sym)) \ 173 _dynsort_arr[(*_dynsort_ndx)++] = _sym_ndx; \ 174 } 175 176 177 Listnode *lnp1; 178 Sym_desc *sdp; 179 Sym_avlnode *sav; 180 Sg_desc *sgp, *tsgp = 0, *dsgp = 0, *esgp = 0; 181 Os_desc *osp, *iosp = 0, *fosp = 0; 182 Ifl_desc *ifl; 183 Word bssndx, etext_ndx, edata_ndx = 0, end_ndx, start_ndx; 184 Word end_abs = 0, etext_abs = 0, edata_abs; 185 Word tlsbssndx = 0, sunwbssndx = 0, sunwdata1ndx; 186 #if defined(_ELF64) 187 Word lbssndx = 0; 188 Addr lbssaddr = 0; 189 #endif 190 Addr bssaddr, etext = 0, edata = 0, end = 0, start = 0; 191 Addr tlsbssaddr = 0; 192 Addr sunwbssaddr = 0, sunwdata1addr; 193 int start_set = 0; 194 Sym _sym = {0}, *sym, *symtab = 0; 195 Sym *dynsym = 0, *ldynsym = 0; 196 Word symtab_ndx = 0; /* index into .symtab */ 197 Word ldynsym_ndx = 0; /* index into .SUNW_ldynsym */ 198 Word dynsym_ndx = 0; /* index into .dynsym */ 199 Word scopesym_ndx = 0; /* index into scoped symbols */ 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 = 0; /* .symtab_shndx table */ 207 Word *dynshndx = 0; /* .dynsym_shndx table */ 208 Word *ldynshndx = 0; /* .SUNW_ldynsym_shndx table */ 209 Word ldynsym_cnt = 0; /* # 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 List weak = {NULL, 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 */ 229 230 /* 231 * Initialize pointers to the symbol table entries and the symbol 232 * table strings. Skip the first symbol entry and the first string 233 * table byte. Note that if we are not generating any output symbol 234 * tables we must still generate and update an internal copies so 235 * that the relocation phase has the correct information. 236 */ 237 if (!(flags & FLG_OF_STRIP) || (flags & FLG_OF_RELOBJ) || 238 ((flags & FLG_OF_STATIC) && ofl->ofl_osversym)) { 239 symtab = (Sym *)ofl->ofl_ossymtab->os_outdata->d_buf; 240 symtab[symtab_ndx++] = _sym; 241 if (ofl->ofl_ossymshndx) 242 symshndx = 243 (Word *)ofl->ofl_ossymshndx->os_outdata->d_buf; 244 } 245 if (OFL_ALLOW_DYNSYM(ofl)) { 246 dynsym = (Sym *)ofl->ofl_osdynsym->os_outdata->d_buf; 247 dynsym[dynsym_ndx++] = _sym; 248 /* 249 * If we are also constructing a .SUNW_ldynsym section 250 * to contain local function symbols, then set it up too. 251 */ 252 if (ofl->ofl_osldynsym) { 253 ldynsym = (Sym *)ofl->ofl_osldynsym->os_outdata->d_buf; 254 ldynsym[ldynsym_ndx++] = _sym; 255 ldynsym_cnt = 1 + ofl->ofl_dynlocscnt + 256 ofl->ofl_dynscopecnt; 257 258 /* 259 * If there is a SUNW_ldynsym, then there may also 260 * be a .SUNW_dynsymsort and/or .SUNW_dyntlssort 261 * sections, used to collect indices of function 262 * and data symbols sorted by address order. 263 */ 264 if (ofl->ofl_osdynsymsort) { /* .SUNW_dynsymsort */ 265 dynsymsort = (Word *) 266 ofl->ofl_osdynsymsort->os_outdata->d_buf; 267 dynsymsort_ndx = 0; 268 } 269 if (ofl->ofl_osdyntlssort) { /* .SUNW_dyntlssort */ 270 dyntlssort = (Word *) 271 ofl->ofl_osdyntlssort->os_outdata->d_buf; 272 dyntlssort_ndx = 0; 273 } 274 } 275 276 /* 277 * Initialize the hash table. 278 */ 279 hashtab = (Word *)(ofl->ofl_oshash->os_outdata->d_buf); 280 hashbkt = &hashtab[2]; 281 hashchain = &hashtab[2 + ofl->ofl_hashbkts]; 282 hashtab[0] = ofl->ofl_hashbkts; 283 hashtab[1] = ofl->ofl_dynshdrcnt + ofl->ofl_globcnt + 284 ofl->ofl_lregsymcnt + 1; 285 if (ofl->ofl_osdynshndx) 286 dynshndx = 287 (Word *)ofl->ofl_osdynshndx->os_outdata->d_buf; 288 if (ofl->ofl_osldynshndx) 289 ldynshndx = 290 (Word *)ofl->ofl_osldynshndx->os_outdata->d_buf; 291 } 292 293 /* 294 * symndx is the symbol index to be used for relocation processing. It 295 * points to the relevant symtab's (.dynsym or .symtab) symbol ndx. 296 */ 297 if (dynsym) 298 symndx = &dynsym_ndx; 299 else 300 symndx = &symtab_ndx; 301 302 /* 303 * If we have version definitions initialize the version symbol index 304 * table. There is one entry for each symbol which contains the symbols 305 * version index. 306 */ 307 if ((flags & (FLG_OF_VERDEF | FLG_OF_NOVERSEC)) == FLG_OF_VERDEF) { 308 versym = (Versym *)ofl->ofl_osversym->os_outdata->d_buf; 309 versym[0] = 0; 310 } else 311 versym = 0; 312 313 /* 314 * If syminfo section exists be prepared to fill it in. 315 */ 316 if (ofl->ofl_ossyminfo) { 317 syminfo = ofl->ofl_ossyminfo->os_outdata->d_buf; 318 syminfo[0].si_flags = SYMINFO_CURRENT; 319 } else 320 syminfo = 0; 321 322 /* 323 * Setup our string tables. 324 */ 325 shstrtab = ofl->ofl_shdrsttab; 326 strtab = ofl->ofl_strtab; 327 dynstr = ofl->ofl_dynstrtab; 328 329 DBG_CALL(Dbg_syms_sec_title(ofl->ofl_lml)); 330 331 /* 332 * Put output file name to the first .symtab and .SUNW_ldynsym symbol. 333 */ 334 if (symtab) { 335 (void) st_setstring(strtab, ofl->ofl_name, &stoff); 336 sym = &symtab[symtab_ndx++]; 337 /* LINTED */ 338 sym->st_name = stoff; 339 sym->st_value = 0; 340 sym->st_size = 0; 341 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_FILE); 342 sym->st_other = 0; 343 sym->st_shndx = SHN_ABS; 344 345 if (versym && !dynsym) 346 versym[1] = 0; 347 } 348 if (ldynsym) { 349 (void) st_setstring(dynstr, ofl->ofl_name, &stoff); 350 sym = &ldynsym[ldynsym_ndx]; 351 /* LINTED */ 352 sym->st_name = stoff; 353 sym->st_value = 0; 354 sym->st_size = 0; 355 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_FILE); 356 sym->st_other = 0; 357 sym->st_shndx = SHN_ABS; 358 359 /* Scoped symbols get filled in global loop below */ 360 ldynscopesym_ndx = ldynsym_ndx + 1; 361 ldynsym_ndx += ofl->ofl_dynscopecnt; 362 } 363 364 /* 365 * If we are to display GOT summary information, then allocate 366 * the buffer to 'cache' the GOT symbols into now. 367 */ 368 if (DBG_ENABLED) { 369 if ((ofl->ofl_gottable = gottable = 370 libld_calloc(ofl->ofl_gotcnt, sizeof (Gottable))) == 0) 371 return ((Addr)S_ERROR); 372 } 373 374 /* 375 * Traverse the program headers. Determine the last executable segment 376 * and the last data segment so that we can update etext and edata. If 377 * we have empty segments (reservations) record them for setting _end. 378 */ 379 for (LIST_TRAVERSE(&ofl->ofl_segs, lnp1, sgp)) { 380 Phdr *phd = &(sgp->sg_phdr); 381 Os_desc *osp; 382 Aliste idx; 383 384 if (phd->p_type == PT_LOAD) { 385 if (sgp->sg_osdescs != NULL) { 386 Word _flags = phd->p_flags & (PF_W | PF_R); 387 388 if (_flags == PF_R) 389 tsgp = sgp; 390 else if (_flags == (PF_W | PF_R)) 391 dsgp = sgp; 392 } else if (sgp->sg_flags & FLG_SG_EMPTY) 393 esgp = sgp; 394 } 395 396 /* 397 * Generate a section symbol for each output section. 398 */ 399 for (APLIST_TRAVERSE(sgp->sg_osdescs, idx, osp)) { 400 Word sectndx; 401 402 sym = &_sym; 403 sym->st_value = osp->os_shdr->sh_addr; 404 sym->st_info = ELF_ST_INFO(STB_LOCAL, STT_SECTION); 405 /* LINTED */ 406 sectndx = elf_ndxscn(osp->os_scn); 407 408 if (symtab) { 409 if (sectndx >= SHN_LORESERVE) { 410 symshndx[symtab_ndx] = sectndx; 411 sym->st_shndx = SHN_XINDEX; 412 } else { 413 /* LINTED */ 414 sym->st_shndx = (Half)sectndx; 415 } 416 symtab[symtab_ndx++] = *sym; 417 } 418 419 if (dynsym && (osp->os_flags & FLG_OS_OUTREL)) 420 dynsym[dynsym_ndx++] = *sym; 421 422 if ((dynsym == 0) || (osp->os_flags & FLG_OS_OUTREL)) { 423 if (versym) 424 versym[*symndx - 1] = 0; 425 osp->os_scnsymndx = *symndx - 1; 426 DBG_CALL(Dbg_syms_sec_entry(ofl->ofl_lml, 427 osp->os_scnsymndx, sgp, osp)); 428 } 429 430 /* 431 * Generate the .shstrtab for this section. 432 */ 433 (void) st_setstring(shstrtab, osp->os_name, &stoff); 434 osp->os_shdr->sh_name = (Word)stoff; 435 436 /* 437 * Find the section index for our special symbols. 438 */ 439 if (sgp == tsgp) { 440 /* LINTED */ 441 etext_ndx = elf_ndxscn(osp->os_scn); 442 } else if (dsgp == sgp) { 443 if (osp->os_shdr->sh_type != SHT_NOBITS) { 444 /* LINTED */ 445 edata_ndx = elf_ndxscn(osp->os_scn); 446 } 447 } 448 449 if (start_set == 0) { 450 start = sgp->sg_phdr.p_vaddr; 451 /* LINTED */ 452 start_ndx = elf_ndxscn(osp->os_scn); 453 start_set++; 454 } 455 456 /* 457 * While we're here, determine whether a .init or .fini 458 * section exist. 459 */ 460 if ((iosp == 0) && (strcmp(osp->os_name, 461 MSG_ORIG(MSG_SCN_INIT)) == 0)) 462 iosp = osp; 463 if ((fosp == 0) && (strcmp(osp->os_name, 464 MSG_ORIG(MSG_SCN_FINI)) == 0)) 465 fosp = osp; 466 } 467 } 468 469 /* 470 * Add local register symbols to the .dynsym. These are required as 471 * DT_REGISTER .dynamic entries must have a symbol to reference. 472 */ 473 if (ofl->ofl_regsyms && dynsym) { 474 int ndx; 475 476 for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 477 Sym_desc * rsdp; 478 479 if ((rsdp = ofl->ofl_regsyms[ndx]) == 0) 480 continue; 481 482 if (((rsdp->sd_flags1 & FLG_SY1_HIDDEN) == 0) && 483 (ELF_ST_BIND(rsdp->sd_sym->st_info) != STB_LOCAL)) 484 continue; 485 486 dynsym[dynsym_ndx] = *(rsdp->sd_sym); 487 rsdp->sd_symndx = *symndx; 488 489 if (dynsym[dynsym_ndx].st_name) { 490 (void) st_setstring(dynstr, rsdp->sd_name, 491 &stoff); 492 dynsym[dynsym_ndx].st_name = stoff; 493 } 494 dynsym_ndx++; 495 } 496 } 497 498 /* 499 * Having traversed all the output segments, warn the user if the 500 * traditional text or data segments don't exist. Otherwise from these 501 * segments establish the values for `etext', `edata', `end', `END', 502 * and `START'. 503 */ 504 if (!(flags & FLG_OF_RELOBJ)) { 505 Sg_desc * sgp; 506 507 if (tsgp) 508 etext = tsgp->sg_phdr.p_vaddr + tsgp->sg_phdr.p_filesz; 509 else { 510 etext = (Addr)0; 511 etext_ndx = SHN_ABS; 512 etext_abs = 1; 513 if (flags & FLG_OF_VERBOSE) 514 eprintf(ofl->ofl_lml, ERR_WARNING, 515 MSG_INTL(MSG_UPD_NOREADSEG)); 516 } 517 if (dsgp) { 518 edata = dsgp->sg_phdr.p_vaddr + dsgp->sg_phdr.p_filesz; 519 } else { 520 edata = (Addr)0; 521 edata_ndx = SHN_ABS; 522 edata_abs = 1; 523 if (flags & FLG_OF_VERBOSE) 524 eprintf(ofl->ofl_lml, ERR_WARNING, 525 MSG_INTL(MSG_UPD_NORDWRSEG)); 526 } 527 528 if (dsgp == 0) { 529 if (tsgp) 530 sgp = tsgp; 531 else 532 sgp = 0; 533 } else if (tsgp == 0) 534 sgp = dsgp; 535 else if (dsgp->sg_phdr.p_vaddr > tsgp->sg_phdr.p_vaddr) 536 sgp = dsgp; 537 else if (dsgp->sg_phdr.p_vaddr < tsgp->sg_phdr.p_vaddr) 538 sgp = tsgp; 539 else { 540 /* 541 * One of the segments must be of zero size. 542 */ 543 if (tsgp->sg_phdr.p_memsz) 544 sgp = tsgp; 545 else 546 sgp = dsgp; 547 } 548 549 if (esgp && (esgp->sg_phdr.p_vaddr > sgp->sg_phdr.p_vaddr)) 550 sgp = esgp; 551 552 if (sgp) { 553 end = sgp->sg_phdr.p_vaddr + sgp->sg_phdr.p_memsz; 554 555 /* 556 * If the last loadable segment is a read-only segment, 557 * then the application which uses the symbol _end to 558 * find the beginning of writable heap area may cause 559 * segmentation violation. We adjust the value of the 560 * _end to skip to the next page boundary. 561 * 562 * 6401812 System interface which returs beginning 563 * heap would be nice. 564 * When the above RFE is implemented, the changes below 565 * could be changed in a better way. 566 */ 567 if ((sgp->sg_phdr.p_flags & PF_W) == 0) 568 end = (Addr)S_ROUND(end, sysconf(_SC_PAGESIZE)); 569 570 /* 571 * If we're dealing with a memory reservation there are 572 * no sections to establish an index for _end, so assign 573 * it as an absolute. 574 */ 575 if (sgp->sg_osdescs != NULL) { 576 /* 577 * Determine the last section for this segment. 578 */ 579 Os_desc *osp = sgp->sg_osdescs->apl_data 580 [sgp->sg_osdescs->apl_nitems - 1]; 581 582 /* LINTED */ 583 end_ndx = elf_ndxscn(osp->os_scn); 584 } else { 585 end_ndx = SHN_ABS; 586 end_abs = 1; 587 } 588 } else { 589 end = (Addr) 0; 590 end_ndx = SHN_ABS; 591 end_abs = 1; 592 eprintf(ofl->ofl_lml, ERR_WARNING, 593 MSG_INTL(MSG_UPD_NOSEG)); 594 } 595 } 596 597 DBG_CALL(Dbg_syms_up_title(ofl->ofl_lml)); 598 599 /* 600 * Initialize the scoped symbol table entry point. This is for all 601 * the global symbols that have been scoped to locals and will be 602 * filled in during global symbol processing so that we don't have 603 * to traverse the globals symbol hash array more than once. 604 */ 605 if (symtab) { 606 scopesym_ndx = symtab_ndx; 607 symtab_ndx += ofl->ofl_scopecnt; 608 } 609 610 /* 611 * Assign .sunwdata1 information 612 */ 613 if (ofl->ofl_issunwdata1) { 614 osp = ofl->ofl_issunwdata1->is_osdesc; 615 sunwdata1addr = (Addr)(osp->os_shdr->sh_addr + 616 ofl->ofl_issunwdata1->is_indata->d_off); 617 /* LINTED */ 618 sunwdata1ndx = elf_ndxscn(osp->os_scn); 619 ofl->ofl_sunwdata1ndx = osp->os_scnsymndx; 620 } 621 622 /* 623 * If we are generating a .symtab collect all the local symbols, 624 * assigning a new virtual address or displacement (value). 625 */ 626 for (LIST_TRAVERSE(&ofl->ofl_objs, lnp1, ifl)) { 627 Xword lndx, local; 628 Is_desc * isc; 629 630 /* 631 * Check that we have local symbols to process. If the user 632 * has indicated scoping then scan the global symbols also 633 * looking for entries from this file to reduce to locals. 634 */ 635 if ((local = ifl->ifl_locscnt) == 0) 636 continue; 637 638 for (lndx = 1; lndx < local; lndx++) { 639 Listnode *lnp2; 640 Gotndx *gnp; 641 uchar_t type; 642 Word *_symshndx; 643 int enter_in_symtab, enter_in_ldynsym; 644 int update_done; 645 646 sdp = ifl->ifl_oldndx[lndx]; 647 sym = sdp->sd_sym; 648 649 /* 650 * Assign a got offset if necessary. 651 */ 652 if ((ld_targ.t_mr.mr_assign_got != NULL) && 653 (*ld_targ.t_mr.mr_assign_got)(ofl, sdp) == S_ERROR) 654 return ((Addr)S_ERROR); 655 656 if (DBG_ENABLED) { 657 for (LIST_TRAVERSE(&sdp->sd_GOTndxs, 658 lnp2, gnp)) { 659 gottable->gt_sym = sdp; 660 gottable->gt_gndx.gn_gotndx = 661 gnp->gn_gotndx; 662 gottable->gt_gndx.gn_addend = 663 gnp->gn_addend; 664 gottable++; 665 } 666 } 667 668 if ((type = ELF_ST_TYPE(sym->st_info)) == STT_SECTION) 669 continue; 670 671 /* 672 * Ignore any symbols that have been marked as invalid 673 * during input processing. Providing these aren't used 674 * for relocation they'll just be dropped from the 675 * output image. 676 */ 677 if (sdp->sd_flags & FLG_SY_INVALID) 678 continue; 679 680 /* 681 * If the section that this symbol was associated 682 * with has been discarded - then we discard 683 * the local symbol along with it. 684 */ 685 if (sdp->sd_flags & FLG_SY_ISDISC) 686 continue; 687 688 /* 689 * Generate an output symbol to represent this input 690 * symbol. Even if the symbol table is to be stripped 691 * we still need to update any local symbols that are 692 * used during relocation. 693 */ 694 enter_in_symtab = symtab && 695 (!(ofl->ofl_flags & FLG_OF_REDLSYM) || 696 (sdp->sd_psyminfo)); 697 enter_in_ldynsym = ldynsym && sdp->sd_name && 698 ldynsym_symtype[type] && 699 !(ofl->ofl_flags & FLG_OF_REDLSYM); 700 _symshndx = 0; 701 if (enter_in_symtab) { 702 if (!dynsym) 703 sdp->sd_symndx = *symndx; 704 symtab[symtab_ndx] = *sym; 705 /* 706 * Provided this isn't an unnamed register 707 * symbol, update its name. 708 */ 709 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 710 symtab[symtab_ndx].st_name) { 711 (void) st_setstring(strtab, 712 sdp->sd_name, &stoff); 713 symtab[symtab_ndx].st_name = stoff; 714 } 715 sdp->sd_flags &= ~FLG_SY_CLEAN; 716 if (symshndx) 717 _symshndx = &symshndx[symtab_ndx]; 718 sdp->sd_sym = sym = &symtab[symtab_ndx++]; 719 720 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 721 (sym->st_shndx == SHN_ABS) && 722 !enter_in_ldynsym) 723 continue; 724 } else if (enter_in_ldynsym) { 725 /* 726 * Not using symtab, but we do have ldynsym 727 * available. 728 */ 729 ldynsym[ldynsym_ndx] = *sym; 730 (void) st_setstring(dynstr, sdp->sd_name, 731 &stoff); 732 ldynsym[ldynsym_ndx].st_name = stoff; 733 734 sdp->sd_flags &= ~FLG_SY_CLEAN; 735 if (ldynshndx) 736 _symshndx = &ldynshndx[ldynsym_ndx]; 737 sdp->sd_sym = sym = &ldynsym[ldynsym_ndx]; 738 /* Add it to sort section if it qualifies */ 739 ADD_TO_DYNSORT(sdp, sym, type, ldynsym_ndx); 740 ldynsym_ndx++; 741 } else { /* Not using symtab or ldynsym */ 742 /* 743 * If this symbol requires modifying to provide 744 * for a relocation or move table update, make 745 * a copy of it. 746 */ 747 if (!(sdp->sd_flags & FLG_SY_UPREQD) && 748 !(sdp->sd_psyminfo)) 749 continue; 750 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 751 (sym->st_shndx == SHN_ABS)) 752 continue; 753 754 if (ld_sym_copy(sdp) == S_ERROR) 755 return ((Addr)S_ERROR); 756 sym = sdp->sd_sym; 757 } 758 759 /* 760 * Update the symbols contents if necessary. 761 */ 762 update_done = 0; 763 if (type == STT_FILE) { 764 sdp->sd_shndx = sym->st_shndx = SHN_ABS; 765 sdp->sd_flags |= FLG_SY_SPECSEC; 766 update_done = 1; 767 } 768 769 /* 770 * If we are expanding the locally bound partially 771 * initialized symbols, then update the address here. 772 */ 773 if (ofl->ofl_issunwdata1 && 774 (sdp->sd_flags & FLG_SY_PAREXPN) && !update_done) { 775 static Addr laddr = 0; 776 777 sym->st_shndx = sunwdata1ndx; 778 sdp->sd_isc = ofl->ofl_issunwdata1; 779 if (flags & FLG_OF_RELOBJ) { 780 sym->st_value = sunwdata1addr; 781 } else { 782 sym->st_value = laddr; 783 laddr += sym->st_size; 784 } 785 sunwdata1addr += sym->st_size; 786 } 787 788 /* 789 * If this isn't an UNDEF symbol (ie. an input section 790 * is associated), update the symbols value and index. 791 */ 792 if (((isc = sdp->sd_isc) != 0) && !update_done) { 793 Word sectndx; 794 795 osp = isc->is_osdesc; 796 /* LINTED */ 797 sym->st_value += 798 (Off)_elf_getxoff(isc->is_indata); 799 if (!(flags & FLG_OF_RELOBJ)) { 800 sym->st_value += osp->os_shdr->sh_addr; 801 /* 802 * TLS symbols are relative to 803 * the TLS segment. 804 */ 805 if ((type == STT_TLS) && 806 (ofl->ofl_tlsphdr)) { 807 sym->st_value -= 808 ofl->ofl_tlsphdr->p_vaddr; 809 } 810 } 811 /* LINTED */ 812 if ((sdp->sd_shndx = sectndx = 813 elf_ndxscn(osp->os_scn)) >= SHN_LORESERVE) { 814 if (_symshndx) { 815 *_symshndx = sectndx; 816 } 817 sym->st_shndx = SHN_XINDEX; 818 } else { 819 /* LINTED */ 820 sym->st_shndx = sectndx; 821 } 822 } 823 824 /* 825 * If entering the symbol in both the symtab and the 826 * ldynsym, then the one in symtab needs to be 827 * copied to ldynsym. If it is only in the ldynsym, 828 * then the code above already set it up and we have 829 * nothing more to do here. 830 */ 831 if (enter_in_symtab && enter_in_ldynsym) { 832 ldynsym[ldynsym_ndx] = *sym; 833 (void) st_setstring(dynstr, sdp->sd_name, 834 &stoff); 835 ldynsym[ldynsym_ndx].st_name = stoff; 836 837 if (_symshndx && ldynshndx) 838 ldynshndx[ldynsym_ndx] = *_symshndx; 839 840 /* Add it to sort section if it qualifies */ 841 ADD_TO_DYNSORT(sdp, sym, type, ldynsym_ndx); 842 843 ldynsym_ndx++; 844 } 845 } 846 } 847 848 /* 849 * Two special symbols are `_init' and `_fini'. If these are supplied 850 * by crti.o then they are used to represent the total concatenation of 851 * the `.init' and `.fini' sections. 852 * 853 * First, determine whether any .init or .fini sections exist. If these 854 * sections exist when a dynamic object is being built, but no `_init' 855 * or `_fini' symbols are found, then the user is probably building this 856 * object directly from ld(1) rather than using a compiler driver that 857 * provides the symbols via crt's. 858 * 859 * If the .init or .fini section exist, and their associated symbols, 860 * determine the size of the sections and updated the symbols value 861 * accordingly. 862 */ 863 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_INIT_U), SYM_NOHASH, 0, 864 ofl)) != NULL) && (sdp->sd_ref == REF_REL_NEED) && sdp->sd_isc && 865 (sdp->sd_isc->is_osdesc == iosp)) { 866 if (ld_sym_copy(sdp) == S_ERROR) 867 return ((Addr)S_ERROR); 868 sdp->sd_sym->st_size = sdp->sd_isc->is_osdesc->os_shdr->sh_size; 869 870 } else if (iosp && !(flags & FLG_OF_RELOBJ)) { 871 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_SYM_NOCRT), 872 MSG_ORIG(MSG_SYM_INIT_U), MSG_ORIG(MSG_SCN_INIT)); 873 } 874 875 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_FINI_U), SYM_NOHASH, 0, 876 ofl)) != NULL) && (sdp->sd_ref == REF_REL_NEED) && sdp->sd_isc && 877 (sdp->sd_isc->is_osdesc == fosp)) { 878 if (ld_sym_copy(sdp) == S_ERROR) 879 return ((Addr)S_ERROR); 880 sdp->sd_sym->st_size = sdp->sd_isc->is_osdesc->os_shdr->sh_size; 881 882 } else if (fosp && !(flags & FLG_OF_RELOBJ)) { 883 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_SYM_NOCRT), 884 MSG_ORIG(MSG_SYM_FINI_U), MSG_ORIG(MSG_SCN_FINI)); 885 } 886 887 /* 888 * Assign .bss information for use with updating COMMON symbols. 889 */ 890 if (ofl->ofl_isbss) { 891 osp = ofl->ofl_isbss->is_osdesc; 892 893 bssaddr = osp->os_shdr->sh_addr + 894 (Off)_elf_getxoff(ofl->ofl_isbss->is_indata); 895 /* LINTED */ 896 bssndx = elf_ndxscn(osp->os_scn); 897 } 898 899 #if defined(_ELF64) 900 /* 901 * For amd64 target, assign .lbss information for use 902 * with updating LCOMMON symbols. 903 */ 904 if ((ld_targ.t_m.m_mach == EM_AMD64) && ofl->ofl_islbss) { 905 osp = ofl->ofl_islbss->is_osdesc; 906 907 lbssaddr = osp->os_shdr->sh_addr + 908 (Off)_elf_getxoff(ofl->ofl_islbss->is_indata); 909 /* LINTED */ 910 lbssndx = elf_ndxscn(osp->os_scn); 911 } 912 #endif 913 914 /* 915 * Assign .tlsbss information for use with updating COMMON symbols. 916 */ 917 if (ofl->ofl_istlsbss) { 918 osp = ofl->ofl_istlsbss->is_osdesc; 919 tlsbssaddr = osp->os_shdr->sh_addr + 920 (Off)_elf_getxoff(ofl->ofl_istlsbss->is_indata); 921 /* LINTED */ 922 tlsbssndx = elf_ndxscn(osp->os_scn); 923 } 924 925 /* 926 * Assign .SUNW_bss information for use with updating COMMON symbols. 927 */ 928 if (ofl->ofl_issunwbss) { 929 osp = ofl->ofl_issunwbss->is_osdesc; 930 sunwbssaddr = (Addr)(osp->os_shdr->sh_addr + 931 ofl->ofl_issunwbss->is_indata->d_off); 932 /* LINTED */ 933 sunwbssndx = elf_ndxscn(osp->os_scn); 934 } 935 936 937 if ((sorted_syms = libld_calloc(ofl->ofl_globcnt + 938 ofl->ofl_elimcnt + ofl->ofl_scopecnt, sizeof (*sorted_syms))) == 0) 939 return ((Addr)S_ERROR); 940 941 scndx = 0; 942 ssndx = ofl->ofl_scopecnt + ofl->ofl_elimcnt; 943 944 /* 945 * Traverse the internal symbol table updating information and 946 * allocating common. 947 */ 948 for (sav = avl_first(&ofl->ofl_symavl); sav; 949 sav = AVL_NEXT(&ofl->ofl_symavl, sav)) { 950 Sym * symptr; 951 int local; 952 int restore; 953 954 sdp = sav->sav_symdesc; 955 956 /* 957 * Ignore any symbols that have been marked as invalid during 958 * input processing. Providing these aren't used for 959 * relocation, they will be dropped from the output image. 960 */ 961 if (sdp->sd_flags & FLG_SY_INVALID) { 962 DBG_CALL(Dbg_syms_old(ofl, sdp)); 963 DBG_CALL(Dbg_syms_ignore(ofl, sdp)); 964 continue; 965 } 966 967 /* 968 * Only needed symbols are copied to the output symbol table. 969 */ 970 if (sdp->sd_ref == REF_DYN_SEEN) 971 continue; 972 973 if ((sdp->sd_flags1 & FLG_SY1_HIDDEN) && 974 (flags & FLG_OF_PROCRED)) 975 local = 1; 976 else 977 local = 0; 978 979 if (local || (ofl->ofl_hashbkts == 0)) { 980 sorted_syms[scndx++].sl_sdp = sdp; 981 } else { 982 sorted_syms[ssndx].sl_hval = sdp->sd_aux->sa_hash % 983 ofl->ofl_hashbkts; 984 sorted_syms[ssndx].sl_sdp = sdp; 985 ssndx++; 986 } 987 988 /* 989 * Note - expand the COMMON symbols here because an address 990 * must be assigned to them in the same order that space was 991 * calculated in sym_validate(). If this ordering isn't 992 * followed differing alignment requirements can throw us all 993 * out of whack. 994 * 995 * The expanded .bss global symbol is handled here as well. 996 * 997 * The actual adding entries into the symbol table still occurs 998 * below in hashbucket order. 999 */ 1000 symptr = sdp->sd_sym; 1001 restore = 0; 1002 if ((sdp->sd_flags & FLG_SY_PAREXPN) || 1003 ((sdp->sd_flags & FLG_SY_SPECSEC) && 1004 (sdp->sd_shndx = symptr->st_shndx) == SHN_COMMON)) { 1005 1006 /* 1007 * An expanded symbol goes to .sunwdata1. 1008 * 1009 * A partial initialized global symbol within a shared 1010 * object goes to .sunwbss. 1011 * 1012 * Assign COMMON allocations to .bss. 1013 * 1014 * Otherwise leave it as is. 1015 */ 1016 if (sdp->sd_flags & FLG_SY_PAREXPN) { 1017 restore = 1; 1018 sdp->sd_shndx = sunwdata1ndx; 1019 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1020 symptr->st_value = (Xword) S_ROUND( 1021 sunwdata1addr, symptr->st_value); 1022 sunwdata1addr = symptr->st_value + 1023 symptr->st_size; 1024 sdp->sd_isc = ofl->ofl_issunwdata1; 1025 sdp->sd_flags |= FLG_SY_COMMEXP; 1026 1027 } else if ((sdp->sd_psyminfo != (Psym_info *)NULL) && 1028 (flags & FLG_OF_SHAROBJ) && 1029 (ELF_ST_BIND(symptr->st_info) != STB_LOCAL)) { 1030 restore = 1; 1031 sdp->sd_shndx = sunwbssndx; 1032 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1033 symptr->st_value = (Xword)S_ROUND(sunwbssaddr, 1034 symptr->st_value); 1035 sunwbssaddr = symptr->st_value + 1036 symptr->st_size; 1037 sdp->sd_isc = ofl->ofl_issunwbss; 1038 sdp->sd_flags |= FLG_SY_COMMEXP; 1039 1040 } else if (ELF_ST_TYPE(symptr->st_info) != STT_TLS && 1041 (local || !(flags & FLG_OF_RELOBJ))) { 1042 restore = 1; 1043 sdp->sd_shndx = bssndx; 1044 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1045 symptr->st_value = (Xword)S_ROUND(bssaddr, 1046 symptr->st_value); 1047 bssaddr = symptr->st_value + symptr->st_size; 1048 sdp->sd_isc = ofl->ofl_isbss; 1049 sdp->sd_flags |= FLG_SY_COMMEXP; 1050 1051 } else if (ELF_ST_TYPE(symptr->st_info) == STT_TLS && 1052 (local || !(flags & FLG_OF_RELOBJ))) { 1053 restore = 1; 1054 sdp->sd_shndx = tlsbssndx; 1055 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1056 symptr->st_value = (Xword)S_ROUND(tlsbssaddr, 1057 symptr->st_value); 1058 tlsbssaddr = symptr->st_value + symptr->st_size; 1059 sdp->sd_isc = ofl->ofl_istlsbss; 1060 sdp->sd_flags |= FLG_SY_COMMEXP; 1061 /* 1062 * TLS symbols are relative to the TLS segment. 1063 */ 1064 symptr->st_value -= ofl->ofl_tlsphdr->p_vaddr; 1065 } 1066 #if defined(_ELF64) 1067 } else if ((ld_targ.t_m.m_mach == EM_AMD64) && 1068 (sdp->sd_flags & FLG_SY_SPECSEC) && 1069 ((sdp->sd_shndx = symptr->st_shndx) == 1070 SHN_X86_64_LCOMMON) && 1071 ((local || !(flags & FLG_OF_RELOBJ)))) { 1072 restore = 1; 1073 sdp->sd_shndx = lbssndx; 1074 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1075 symptr->st_value = (Xword)S_ROUND(lbssaddr, 1076 symptr->st_value); 1077 lbssaddr = symptr->st_value + symptr->st_size; 1078 sdp->sd_isc = ofl->ofl_islbss; 1079 sdp->sd_flags |= FLG_SY_COMMEXP; 1080 #endif 1081 } 1082 1083 if (restore != 0) { 1084 uchar_t type, bind; 1085 1086 /* 1087 * Make sure this COMMON symbol is returned to the same 1088 * binding as was defined in the original relocatable 1089 * object reference. 1090 */ 1091 type = ELF_ST_TYPE(symptr->st_info); 1092 if (sdp->sd_flags & FLG_SY_GLOBREF) 1093 bind = STB_GLOBAL; 1094 else 1095 bind = STB_WEAK; 1096 1097 symptr->st_info = ELF_ST_INFO(bind, type); 1098 } 1099 } 1100 1101 if (ofl->ofl_hashbkts) { 1102 qsort(sorted_syms + ofl->ofl_scopecnt + ofl->ofl_elimcnt, 1103 ofl->ofl_globcnt, sizeof (Sym_s_list), 1104 (int (*)(const void *, const void *))sym_hash_compare); 1105 } 1106 1107 for (ssndx = 0; ssndx < (ofl->ofl_elimcnt + ofl->ofl_scopecnt + 1108 ofl->ofl_globcnt); ssndx++) { 1109 const char *name; 1110 Sym *sym; 1111 Sym_aux *sap; 1112 Half spec; 1113 int local = 0, dynlocal = 0, enter_in_symtab; 1114 Listnode *lnp2; 1115 Gotndx *gnp; 1116 Word sectndx; 1117 1118 sdp = sorted_syms[ssndx].sl_sdp; 1119 sectndx = 0; 1120 1121 if (symtab) 1122 enter_in_symtab = 1; 1123 else 1124 enter_in_symtab = 0; 1125 1126 /* 1127 * Assign a got offset if necessary. 1128 */ 1129 if ((ld_targ.t_mr.mr_assign_got != NULL) && 1130 (*ld_targ.t_mr.mr_assign_got)(ofl, sdp) == S_ERROR) 1131 return ((Addr)S_ERROR); 1132 1133 if (DBG_ENABLED) { 1134 for (LIST_TRAVERSE(&sdp->sd_GOTndxs, lnp2, gnp)) { 1135 gottable->gt_sym = sdp; 1136 gottable->gt_gndx.gn_gotndx = gnp->gn_gotndx; 1137 gottable->gt_gndx.gn_addend = gnp->gn_addend; 1138 gottable++; 1139 } 1140 1141 if (sdp->sd_aux && sdp->sd_aux->sa_PLTGOTndx) { 1142 gottable->gt_sym = sdp; 1143 gottable->gt_gndx.gn_gotndx = 1144 sdp->sd_aux->sa_PLTGOTndx; 1145 gottable++; 1146 } 1147 } 1148 1149 1150 /* 1151 * If this symbol has been marked as being reduced to local 1152 * scope then it will have to be placed in the scoped portion 1153 * of the .symtab. Retain the appropriate index for use in 1154 * version symbol indexing and relocation. 1155 */ 1156 if ((sdp->sd_flags1 & FLG_SY1_HIDDEN) && 1157 (flags & FLG_OF_PROCRED)) { 1158 local = 1; 1159 if (!(sdp->sd_flags1 & FLG_SY1_ELIM) && !dynsym) 1160 sdp->sd_symndx = scopesym_ndx; 1161 else 1162 sdp->sd_symndx = 0; 1163 1164 if (sdp->sd_flags1 & FLG_SY1_ELIM) { 1165 enter_in_symtab = 0; 1166 } else if (ldynsym && sdp->sd_sym->st_name && 1167 ldynsym_symtype[ 1168 ELF_ST_TYPE(sdp->sd_sym->st_info)]) { 1169 dynlocal = 1; 1170 } 1171 } else { 1172 sdp->sd_symndx = *symndx; 1173 } 1174 1175 /* 1176 * Copy basic symbol and string information. 1177 */ 1178 name = sdp->sd_name; 1179 sap = sdp->sd_aux; 1180 1181 /* 1182 * If we require to record version symbol indexes, update the 1183 * associated version symbol information for all defined 1184 * symbols. If a version definition is required any zero value 1185 * symbol indexes would have been flagged as undefined symbol 1186 * errors, however if we're just scoping these need to fall into 1187 * the base of global symbols. 1188 */ 1189 if (sdp->sd_symndx && versym) { 1190 Half vndx = 0; 1191 1192 if (sdp->sd_flags & FLG_SY_MVTOCOMM) 1193 vndx = VER_NDX_GLOBAL; 1194 else if (sdp->sd_ref == REF_REL_NEED) { 1195 Half symflags1 = sdp->sd_flags1; 1196 1197 vndx = sap->sa_overndx; 1198 if ((vndx == 0) && 1199 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 1200 if (symflags1 & FLG_SY1_HIDDEN) 1201 vndx = VER_NDX_LOCAL; 1202 else 1203 vndx = VER_NDX_GLOBAL; 1204 } 1205 } 1206 versym[sdp->sd_symndx] = vndx; 1207 } 1208 1209 /* 1210 * If we are creating the .syminfo section then set per symbol 1211 * flags here. 1212 */ 1213 if (sdp->sd_symndx && syminfo && 1214 !(sdp->sd_flags & FLG_SY_NOTAVAIL)) { 1215 int ndx = sdp->sd_symndx; 1216 List *sip = &(ofl->ofl_syminfsyms); 1217 1218 if (sdp->sd_flags & FLG_SY_MVTOCOMM) 1219 /* 1220 * Identify a copy relocation symbol. 1221 */ 1222 syminfo[ndx].si_flags |= SYMINFO_FLG_COPY; 1223 1224 if (sdp->sd_ref == REF_DYN_NEED) { 1225 /* 1226 * A reference is bound to a needed dependency. 1227 * Save this symbol descriptor, as its boundto 1228 * element will need updating after the .dynamic 1229 * section has been created. Flag whether this 1230 * reference is lazy loadable, and if a direct 1231 * binding is to be established. 1232 */ 1233 if (list_appendc(sip, sdp) == 0) 1234 return (0); 1235 1236 syminfo[ndx].si_flags |= SYMINFO_FLG_DIRECT; 1237 if (sdp->sd_flags & FLG_SY_LAZYLD) 1238 syminfo[ndx].si_flags |= 1239 SYMINFO_FLG_LAZYLOAD; 1240 1241 /* 1242 * Enable direct symbol bindings if: 1243 * 1244 * . Symbol was identified with the DIRECT 1245 * keyword in a mapfile. 1246 * 1247 * . Symbol reference has been bound to a 1248 * dependency which was specified as 1249 * requiring direct bindings with -zdirect. 1250 * 1251 * . All symbol references are required to 1252 * use direct bindings via -Bdirect. 1253 */ 1254 if (sdp->sd_flags1 & FLG_SY1_DIR) 1255 syminfo[ndx].si_flags |= 1256 SYMINFO_FLG_DIRECTBIND; 1257 1258 } else if ((sdp->sd_flags & FLG_SY_EXTERN) && 1259 (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 1260 /* 1261 * If this symbol has been explicitly defined 1262 * as external, and remains unresolved, mark 1263 * it as external. 1264 */ 1265 syminfo[ndx].si_boundto = SYMINFO_BT_EXTERN; 1266 1267 } else if ((sdp->sd_flags & FLG_SY_PARENT) && 1268 (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 1269 /* 1270 * If this symbol has been explicitly defined 1271 * to be a reference to a parent object, 1272 * indicate whether a direct binding should be 1273 * established. 1274 */ 1275 syminfo[ndx].si_flags |= SYMINFO_FLG_DIRECT; 1276 syminfo[ndx].si_boundto = SYMINFO_BT_PARENT; 1277 if (sdp->sd_flags1 & FLG_SY1_DIR) 1278 syminfo[ndx].si_flags |= 1279 SYMINFO_FLG_DIRECTBIND; 1280 1281 } else if (sdp->sd_flags & FLG_SY_STDFLTR) { 1282 /* 1283 * A filter definition. Although this symbol 1284 * can only be a stub, it might be necessary to 1285 * prevent external direct bindings. 1286 */ 1287 syminfo[ndx].si_flags |= SYMINFO_FLG_FILTER; 1288 if (sdp->sd_flags1 & FLG_SY1_NDIR) 1289 syminfo[ndx].si_flags |= 1290 SYMINFO_FLG_NOEXTDIRECT; 1291 1292 } else if (sdp->sd_flags & FLG_SY_AUXFLTR) { 1293 /* 1294 * An auxiliary filter definition. By nature, 1295 * this definition is direct, in that should the 1296 * filtee lookup fail, we'll fall back to this 1297 * object. It may still be necesssary to 1298 * prevent external direct bindings. 1299 */ 1300 syminfo[ndx].si_flags |= SYMINFO_FLG_AUXILIARY; 1301 if (sdp->sd_flags1 & FLG_SY1_NDIR) 1302 syminfo[ndx].si_flags |= 1303 SYMINFO_FLG_NOEXTDIRECT; 1304 1305 } else if ((sdp->sd_ref == REF_REL_NEED) && 1306 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 1307 1308 /* 1309 * This definition exists within the object 1310 * being created. Flag whether it is necessary 1311 * to prevent external direct bindings. 1312 */ 1313 if (sdp->sd_flags1 & FLG_SY1_NDIR) { 1314 syminfo[ndx].si_boundto = 1315 SYMINFO_BT_NONE; 1316 syminfo[ndx].si_flags |= 1317 SYMINFO_FLG_NOEXTDIRECT; 1318 } 1319 1320 /* 1321 * Indicate that this symbol is acting as an 1322 * individual interposer. 1323 */ 1324 if (sdp->sd_flags & FLG_SY_INTPOSE) { 1325 syminfo[ndx].si_flags |= 1326 SYMINFO_FLG_INTERPOSE; 1327 } 1328 1329 /* 1330 * If external bindings are allowed, or this is 1331 * a translator symbol, indicate the binding, 1332 * and a direct binding if necessary. 1333 */ 1334 if (((sdp->sd_flags1 & FLG_SY1_NDIR) == 0) || 1335 ((dtflags_1 & DF_1_TRANS) && sdp->sd_aux && 1336 sdp->sd_aux->sa_bindto)) { 1337 1338 syminfo[ndx].si_flags |= 1339 SYMINFO_FLG_DIRECT; 1340 1341 if (sdp->sd_flags1 & FLG_SY1_DIR) 1342 syminfo[ndx].si_flags |= 1343 SYMINFO_FLG_DIRECTBIND; 1344 1345 /* 1346 * If this is a translator, the symbols 1347 * boundto element will indicate the 1348 * dependency to which it should resolve 1349 * rather than itself. Save this info 1350 * for updating after the .dynamic 1351 * section has been created. 1352 */ 1353 if ((dtflags_1 & DF_1_TRANS) && 1354 sdp->sd_aux && 1355 sdp->sd_aux->sa_bindto) { 1356 if (list_appendc(sip, sdp) == 0) 1357 return (0); 1358 } else { 1359 syminfo[ndx].si_boundto = 1360 SYMINFO_BT_SELF; 1361 } 1362 } 1363 } 1364 } 1365 1366 /* 1367 * Note that the `sym' value is reset to be one of the new 1368 * symbol table entries. This symbol will be updated further 1369 * depending on the type of the symbol. Process the .symtab 1370 * first, followed by the .dynsym, thus the `sym' value will 1371 * remain as the .dynsym value when the .dynsym is present. 1372 * This ensures that any versioning symbols st_name value will 1373 * be appropriate for the string table used by version 1374 * entries. 1375 */ 1376 if (enter_in_symtab) { 1377 Word _symndx; 1378 1379 if (local) 1380 _symndx = scopesym_ndx; 1381 else 1382 _symndx = symtab_ndx; 1383 1384 symtab[_symndx] = *sdp->sd_sym; 1385 sdp->sd_sym = sym = &symtab[_symndx]; 1386 (void) st_setstring(strtab, name, &stoff); 1387 sym->st_name = stoff; 1388 } 1389 if (dynlocal) { 1390 ldynsym[ldynscopesym_ndx] = *sdp->sd_sym; 1391 sdp->sd_sym = sym = &ldynsym[ldynscopesym_ndx]; 1392 (void) st_setstring(dynstr, name, &stoff); 1393 ldynsym[ldynscopesym_ndx].st_name = stoff; 1394 /* Add it to sort section if it qualifies */ 1395 ADD_TO_DYNSORT(sdp, sym, ELF_ST_TYPE(sym->st_info), 1396 ldynscopesym_ndx); 1397 } 1398 1399 if (dynsym && !local) { 1400 dynsym[dynsym_ndx] = *sdp->sd_sym; 1401 1402 /* 1403 * Provided this isn't an unnamed register symbol, 1404 * update the symbols name and hash value. 1405 */ 1406 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 1407 dynsym[dynsym_ndx].st_name) { 1408 (void) st_setstring(dynstr, name, &stoff); 1409 dynsym[dynsym_ndx].st_name = stoff; 1410 1411 if (stoff) { 1412 Word _hashndx; 1413 1414 hashval = 1415 sap->sa_hash % ofl->ofl_hashbkts; 1416 1417 /* LINTED */ 1418 if (_hashndx = hashbkt[hashval]) { 1419 while (hashchain[_hashndx]) { 1420 _hashndx = 1421 hashchain[_hashndx]; 1422 } 1423 hashchain[_hashndx] = 1424 sdp->sd_symndx; 1425 } else { 1426 hashbkt[hashval] = 1427 sdp->sd_symndx; 1428 } 1429 } 1430 } 1431 sdp->sd_sym = sym = &dynsym[dynsym_ndx]; 1432 1433 /* 1434 * Add it to sort section if it qualifies. 1435 * The indexes in that section are relative to the 1436 * the adjacent SUNW_ldynsym/dymsym pair, so we 1437 * add the number of items in SUNW_ldynsym to the 1438 * dynsym index. 1439 */ 1440 ADD_TO_DYNSORT(sdp, sym, ELF_ST_TYPE(sym->st_info), 1441 ldynsym_cnt + dynsym_ndx); 1442 } 1443 if (!enter_in_symtab && (!dynsym || (local && !dynlocal))) { 1444 if (!(sdp->sd_flags & FLG_SY_UPREQD)) 1445 continue; 1446 sym = sdp->sd_sym; 1447 } else 1448 sdp->sd_flags &= ~FLG_SY_CLEAN; 1449 1450 1451 /* 1452 * If we have a weak data symbol for which we need the real 1453 * symbol also, save this processing until later. 1454 * 1455 * The exception to this is if the weak/strong have PLT's 1456 * assigned to them. In that case we don't do the post-weak 1457 * processing because the PLT's must be maintained so that we 1458 * can do 'interpositioning' on both of the symbols. 1459 */ 1460 if ((sap->sa_linkndx) && 1461 (ELF_ST_BIND(sym->st_info) == STB_WEAK) && 1462 (!sap->sa_PLTndx)) { 1463 Sym_desc * _sdp = 1464 sdp->sd_file->ifl_oldndx[sap->sa_linkndx]; 1465 1466 if (_sdp->sd_ref != REF_DYN_SEEN) { 1467 if ((wkp = 1468 libld_calloc(sizeof (Wk_desc), 1)) == 0) 1469 return ((Addr)S_ERROR); 1470 1471 if (enter_in_symtab) { 1472 if (local) 1473 wkp->wk_symtab = 1474 &symtab[scopesym_ndx]; 1475 else 1476 wkp->wk_symtab = 1477 &symtab[symtab_ndx]; 1478 } 1479 if (dynsym) { 1480 if (!local) { 1481 wkp->wk_dynsym = 1482 &dynsym[dynsym_ndx]; 1483 } else if (dynlocal) { 1484 wkp->wk_dynsym = 1485 &ldynsym[ldynscopesym_ndx]; 1486 } 1487 } 1488 wkp->wk_weak = sdp; 1489 wkp->wk_alias = _sdp; 1490 1491 if (!(list_appendc(&weak, wkp))) 1492 return ((Addr)S_ERROR); 1493 1494 if (enter_in_symtab) 1495 if (local) 1496 scopesym_ndx++; 1497 else 1498 symtab_ndx++; 1499 if (dynsym) { 1500 if (!local) { 1501 dynsym_ndx++; 1502 } else if (dynlocal) { 1503 ldynscopesym_ndx++; 1504 } 1505 } 1506 continue; 1507 } 1508 } 1509 1510 DBG_CALL(Dbg_syms_old(ofl, sdp)); 1511 1512 spec = NULL; 1513 /* 1514 * assign new symbol value. 1515 */ 1516 sectndx = sdp->sd_shndx; 1517 if (sectndx == SHN_UNDEF) { 1518 if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) && 1519 (sym->st_value != 0)) { 1520 eprintf(ofl->ofl_lml, ERR_WARNING, 1521 MSG_INTL(MSG_SYM_NOTNULL), 1522 demangle(name), sdp->sd_file->ifl_name); 1523 } 1524 1525 /* 1526 * Undefined weak global, if we are generating a static 1527 * executable, output as an absolute zero. Otherwise 1528 * leave it as is, ld.so.1 will skip symbols of this 1529 * type (this technique allows applications and 1530 * libraries to test for the existence of a symbol as an 1531 * indication of the presence or absence of certain 1532 * functionality). 1533 */ 1534 if (((flags & (FLG_OF_STATIC | FLG_OF_EXEC)) == 1535 (FLG_OF_STATIC | FLG_OF_EXEC)) && 1536 (ELF_ST_BIND(sym->st_info) == STB_WEAK)) { 1537 sdp->sd_flags |= FLG_SY_SPECSEC; 1538 sdp->sd_shndx = sectndx = SHN_ABS; 1539 } 1540 } else if ((sdp->sd_flags & FLG_SY_SPECSEC) && 1541 (sectndx == SHN_COMMON)) { 1542 /* COMMONs have already been processed */ 1543 /* EMPTY */ 1544 ; 1545 } else { 1546 if ((sdp->sd_flags & FLG_SY_SPECSEC) && 1547 (sectndx == SHN_ABS)) 1548 spec = sdp->sd_aux->sa_symspec; 1549 1550 /* LINTED */ 1551 if (sdp->sd_flags & FLG_SY_COMMEXP) { 1552 /* 1553 * This is (or was) a COMMON symbol which was 1554 * processed above - no processing 1555 * required here. 1556 */ 1557 ; 1558 } else if (sdp->sd_ref == REF_DYN_NEED) { 1559 uchar_t type, bind; 1560 1561 sectndx = SHN_UNDEF; 1562 sym->st_value = 0; 1563 sym->st_size = 0; 1564 1565 /* 1566 * Make sure this undefined symbol is returned 1567 * to the same binding as was defined in the 1568 * original relocatable object reference. 1569 */ 1570 type = ELF_ST_TYPE(sym-> st_info); 1571 if (sdp->sd_flags & FLG_SY_GLOBREF) 1572 bind = STB_GLOBAL; 1573 else 1574 bind = STB_WEAK; 1575 1576 sym->st_info = ELF_ST_INFO(bind, type); 1577 1578 } else if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1579 (sdp->sd_ref == REF_REL_NEED)) { 1580 osp = sdp->sd_isc->is_osdesc; 1581 /* LINTED */ 1582 sectndx = elf_ndxscn(osp->os_scn); 1583 1584 /* 1585 * In an executable, the new symbol value is the 1586 * old value (offset into defining section) plus 1587 * virtual address of defining section. In a 1588 * relocatable, the new value is the old value 1589 * plus the displacement of the section within 1590 * the file. 1591 */ 1592 /* LINTED */ 1593 sym->st_value += 1594 (Off)_elf_getxoff(sdp->sd_isc->is_indata); 1595 1596 if (!(flags & FLG_OF_RELOBJ)) { 1597 sym->st_value += osp->os_shdr->sh_addr; 1598 /* 1599 * TLS symbols are relative to 1600 * the TLS segment. 1601 */ 1602 if ((ELF_ST_TYPE(sym->st_info) == 1603 STT_TLS) && (ofl->ofl_tlsphdr)) 1604 sym->st_value -= 1605 ofl->ofl_tlsphdr->p_vaddr; 1606 } 1607 } 1608 } 1609 1610 if (spec) { 1611 switch (spec) { 1612 case SDAUX_ID_ETEXT: 1613 sym->st_value = etext; 1614 sectndx = etext_ndx; 1615 if (etext_abs) 1616 sdp->sd_flags |= FLG_SY_SPECSEC; 1617 else 1618 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1619 break; 1620 case SDAUX_ID_EDATA: 1621 sym->st_value = edata; 1622 sectndx = edata_ndx; 1623 if (edata_abs) 1624 sdp->sd_flags |= FLG_SY_SPECSEC; 1625 else 1626 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1627 break; 1628 case SDAUX_ID_END: 1629 sym->st_value = end; 1630 sectndx = end_ndx; 1631 if (end_abs) 1632 sdp->sd_flags |= FLG_SY_SPECSEC; 1633 else 1634 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1635 break; 1636 case SDAUX_ID_START: 1637 sym->st_value = start; 1638 sectndx = start_ndx; 1639 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1640 break; 1641 case SDAUX_ID_DYN: 1642 if (flags & FLG_OF_DYNAMIC) { 1643 sym->st_value = ofl-> 1644 ofl_osdynamic->os_shdr->sh_addr; 1645 /* LINTED */ 1646 sectndx = elf_ndxscn( 1647 ofl->ofl_osdynamic->os_scn); 1648 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1649 } 1650 break; 1651 case SDAUX_ID_PLT: 1652 if (ofl->ofl_osplt) { 1653 sym->st_value = ofl-> 1654 ofl_osplt->os_shdr->sh_addr; 1655 /* LINTED */ 1656 sectndx = elf_ndxscn( 1657 ofl->ofl_osplt->os_scn); 1658 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1659 } 1660 break; 1661 case SDAUX_ID_GOT: 1662 /* 1663 * Symbol bias for negative growing tables is 1664 * stored in symbol's value during 1665 * allocate_got(). 1666 */ 1667 sym->st_value += ofl-> 1668 ofl_osgot->os_shdr->sh_addr; 1669 /* LINTED */ 1670 sectndx = elf_ndxscn(ofl-> 1671 ofl_osgot->os_scn); 1672 sdp->sd_flags &= ~FLG_SY_SPECSEC; 1673 break; 1674 default: 1675 /* NOTHING */ 1676 ; 1677 } 1678 } 1679 1680 /* 1681 * If a plt index has been assigned to an undefined function, 1682 * update the symbols value to the appropriate .plt address. 1683 */ 1684 if ((flags & FLG_OF_DYNAMIC) && (flags & FLG_OF_EXEC) && 1685 (sdp->sd_file) && 1686 (sdp->sd_file->ifl_ehdr->e_type == ET_DYN) && 1687 (ELF_ST_TYPE(sym->st_info) == STT_FUNC) && 1688 !(flags & FLG_OF_BFLAG)) { 1689 if (sap->sa_PLTndx) 1690 sym->st_value = 1691 (*ld_targ.t_mr.mr_calc_plt_addr)(sdp, ofl); 1692 } 1693 1694 /* 1695 * Finish updating the symbols. 1696 */ 1697 1698 /* 1699 * Sym Update: if scoped local - set local binding 1700 */ 1701 if (local) 1702 sym->st_info = ELF_ST_INFO(STB_LOCAL, 1703 ELF_ST_TYPE(sym->st_info)); 1704 1705 /* 1706 * Sym Updated: If both the .symtab and .dynsym 1707 * are present then we've actually updated the information in 1708 * the .dynsym, therefore copy this same information to the 1709 * .symtab entry. 1710 */ 1711 sdp->sd_shndx = sectndx; 1712 if (enter_in_symtab && dynsym && (!local || dynlocal)) { 1713 Word _symndx = dynlocal ? scopesym_ndx : symtab_ndx; 1714 1715 symtab[_symndx].st_value = sym->st_value; 1716 symtab[_symndx].st_size = sym->st_size; 1717 symtab[_symndx].st_info = sym->st_info; 1718 symtab[_symndx].st_other = sym->st_other; 1719 } 1720 1721 1722 if (enter_in_symtab) { 1723 Word _symndx; 1724 1725 if (local) 1726 _symndx = scopesym_ndx++; 1727 else 1728 _symndx = symtab_ndx++; 1729 if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1730 (sectndx >= SHN_LORESERVE)) { 1731 assert(symshndx != 0); 1732 symshndx[_symndx] = sectndx; 1733 symtab[_symndx].st_shndx = SHN_XINDEX; 1734 } else { 1735 /* LINTED */ 1736 symtab[_symndx].st_shndx = (Half)sectndx; 1737 } 1738 } 1739 1740 if (dynsym && (!local || dynlocal)) { 1741 /* 1742 * dynsym and ldynsym are distinct tables, so 1743 * we use indirection to access the right one 1744 * and the related extended section index array. 1745 */ 1746 Word _symndx; 1747 Sym *_dynsym; 1748 Word *_dynshndx; 1749 1750 if (!local) { 1751 _symndx = dynsym_ndx++; 1752 _dynsym = dynsym; 1753 _dynshndx = dynshndx; 1754 } else { 1755 _symndx = ldynscopesym_ndx++; 1756 _dynsym = ldynsym; 1757 _dynshndx = ldynshndx; 1758 } 1759 if (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) && 1760 (sectndx >= SHN_LORESERVE)) { 1761 assert(_dynshndx != 0); 1762 _dynshndx[_symndx] = sectndx; 1763 _dynsym[_symndx].st_shndx = SHN_XINDEX; 1764 } else { 1765 /* LINTED */ 1766 _dynsym[_symndx].st_shndx = (Half)sectndx; 1767 } 1768 } 1769 1770 DBG_CALL(Dbg_syms_new(ofl, sym, sdp)); 1771 } 1772 1773 /* 1774 * Now that all the symbols have been processed update any weak symbols 1775 * information (ie. copy all information except `st_name'). As both 1776 * symbols will be represented in the output, return the weak symbol to 1777 * its correct type. 1778 */ 1779 for (LIST_TRAVERSE(&weak, lnp1, wkp)) { 1780 Sym_desc * sdp, * _sdp; 1781 Sym * sym, * _sym, * __sym; 1782 uchar_t bind; 1783 1784 sdp = wkp->wk_weak; 1785 _sdp = wkp->wk_alias; 1786 _sym = _sdp->sd_sym; 1787 1788 sdp->sd_flags |= FLG_SY_WEAKDEF; 1789 1790 /* 1791 * If the symbol definition has been scoped then assign it to 1792 * be local, otherwise if it's from a shared object then we need 1793 * to maintain the binding of the original reference. 1794 */ 1795 if (sdp->sd_flags1 & FLG_SY1_HIDDEN) { 1796 if (flags & FLG_OF_PROCRED) 1797 bind = STB_LOCAL; 1798 else 1799 bind = STB_WEAK; 1800 } else if ((sdp->sd_ref == REF_DYN_NEED) && 1801 (sdp->sd_flags & FLG_SY_GLOBREF)) 1802 bind = STB_GLOBAL; 1803 else 1804 bind = STB_WEAK; 1805 1806 DBG_CALL(Dbg_syms_old(ofl, sdp)); 1807 if ((sym = wkp->wk_symtab) != 0) { 1808 sym = wkp->wk_symtab; 1809 sym->st_value = _sym->st_value; 1810 sym->st_size = _sym->st_size; 1811 sym->st_other = _sym->st_other; 1812 sym->st_shndx = _sym->st_shndx; 1813 sym->st_info = ELF_ST_INFO(bind, 1814 ELF_ST_TYPE(sym->st_info)); 1815 __sym = sym; 1816 } 1817 if ((sym = wkp->wk_dynsym) != 0) { 1818 sym = wkp->wk_dynsym; 1819 sym->st_value = _sym->st_value; 1820 sym->st_size = _sym->st_size; 1821 sym->st_other = _sym->st_other; 1822 sym->st_shndx = _sym->st_shndx; 1823 sym->st_info = ELF_ST_INFO(bind, 1824 ELF_ST_TYPE(sym->st_info)); 1825 __sym = sym; 1826 } 1827 DBG_CALL(Dbg_syms_new(ofl, __sym, sdp)); 1828 } 1829 1830 /* 1831 * Now display GOT debugging information if required. 1832 */ 1833 DBG_CALL(Dbg_got_display(ofl, 0, 0, 1834 ld_targ.t_m.m_got_xnumber, ld_targ.t_m.m_got_entsize)); 1835 1836 /* 1837 * Update the section headers information. sh_info is 1838 * supposed to contain the offset at which the first 1839 * global symbol resides in the symbol table, while 1840 * sh_link contains the section index of the associated 1841 * string table. 1842 */ 1843 if (symtab) { 1844 Shdr *shdr = ofl->ofl_ossymtab->os_shdr; 1845 1846 shdr->sh_info = ofl->ofl_shdrcnt + ofl->ofl_locscnt + 1847 ofl->ofl_scopecnt + 2; 1848 /* LINTED */ 1849 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osstrtab->os_scn); 1850 if (symshndx) { 1851 shdr = ofl->ofl_ossymshndx->os_shdr; 1852 shdr->sh_link = 1853 (Word)elf_ndxscn(ofl->ofl_ossymtab->os_scn); 1854 } 1855 } 1856 if (dynsym) { 1857 Shdr *shdr = ofl->ofl_osdynsym->os_shdr; 1858 1859 shdr->sh_info = 1 + ofl->ofl_dynshdrcnt + ofl->ofl_lregsymcnt; 1860 /* LINTED */ 1861 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 1862 1863 ofl->ofl_oshash->os_shdr->sh_link = 1864 /* LINTED */ 1865 (Word)elf_ndxscn(ofl->ofl_osdynsym->os_scn); 1866 if (dynshndx) { 1867 shdr = ofl->ofl_osdynshndx->os_shdr; 1868 shdr->sh_link = 1869 (Word)elf_ndxscn(ofl->ofl_osdynsym->os_scn); 1870 } 1871 } 1872 if (ldynsym) { 1873 Shdr *shdr = ofl->ofl_osldynsym->os_shdr; 1874 1875 /* ldynsym has no globals, so give index one past the end */ 1876 shdr->sh_info = ldynsym_ndx; 1877 1878 /* 1879 * The ldynsym and dynsym must be adjacent. The 1880 * idea is that rtld should be able to start with 1881 * the ldynsym and march straight through the end 1882 * of dynsym, seeing them as a single symbol table, 1883 * despite the fact that they are in distinct sections. 1884 * Ensure that this happened correctly. 1885 * 1886 * Note that I use ldynsym_ndx here instead of the 1887 * computation I used to set the section size 1888 * (found in ldynsym_cnt). The two will agree, unless 1889 * we somehow miscounted symbols or failed to insert them 1890 * all. Using ldynsym_ndx here catches that error in 1891 * addition to checking for adjacency. 1892 */ 1893 assert(dynsym == (ldynsym + ldynsym_ndx)); 1894 1895 1896 /* LINTED */ 1897 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 1898 1899 if (ldynshndx) { 1900 shdr = ofl->ofl_osldynshndx->os_shdr; 1901 shdr->sh_link = 1902 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 1903 } 1904 1905 /* 1906 * The presence of .SUNW_ldynsym means that there may be 1907 * associated sort sections, one for regular symbols 1908 * and the other for TLS. Each sort section needs the 1909 * following done: 1910 * - Section header link references .SUNW_ldynsym 1911 * - Should have received the expected # of items 1912 * - Sorted by increasing address 1913 */ 1914 if (ofl->ofl_osdynsymsort) { /* .SUNW_dynsymsort */ 1915 ofl->ofl_osdynsymsort->os_shdr->sh_link = 1916 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 1917 assert(ofl->ofl_dynsymsortcnt == dynsymsort_ndx); 1918 1919 if (dynsymsort_ndx > 1) { 1920 dynsort_compare_syms = ldynsym; 1921 qsort(dynsymsort, dynsymsort_ndx, 1922 sizeof (*dynsymsort), dynsort_compare); 1923 dynsort_dupwarn(ofl, ldynsym, 1924 st_getstrbuf(dynstr), 1925 dynsymsort, dynsymsort_ndx, 1926 MSG_ORIG(MSG_SCN_DYNSYMSORT)); 1927 } 1928 } 1929 if (ofl->ofl_osdyntlssort) { /* .SUNW_dyntlssort */ 1930 ofl->ofl_osdyntlssort->os_shdr->sh_link = 1931 (Word)elf_ndxscn(ofl->ofl_osldynsym->os_scn); 1932 assert(ofl->ofl_dyntlssortcnt == dyntlssort_ndx); 1933 1934 if (dyntlssort_ndx > 1) { 1935 dynsort_compare_syms = ldynsym; 1936 qsort(dyntlssort, dyntlssort_ndx, 1937 sizeof (*dyntlssort), dynsort_compare); 1938 dynsort_dupwarn(ofl, ldynsym, 1939 st_getstrbuf(dynstr), 1940 dyntlssort, dyntlssort_ndx, 1941 MSG_ORIG(MSG_SCN_DYNTLSSORT)); 1942 } 1943 } 1944 } 1945 1946 /* 1947 * Used by ld.so.1 only. 1948 */ 1949 return (etext); 1950 1951 #undef ADD_TO_DYNSORT 1952 } 1953 1954 /* 1955 * Build the dynamic section. 1956 * 1957 * This routine must be maintained in parallel with make_dynamic() 1958 * in sections.c 1959 */ 1960 static int 1961 update_odynamic(Ofl_desc *ofl) 1962 { 1963 Listnode *lnp; 1964 Ifl_desc *ifl; 1965 Sym_desc *sdp; 1966 Shdr *shdr; 1967 Dyn *_dyn = (Dyn *)ofl->ofl_osdynamic->os_outdata->d_buf; 1968 Dyn *dyn; 1969 Str_tbl *dynstr; 1970 size_t stoff; 1971 ofl_flag_t flags = ofl->ofl_flags; 1972 int not_relobj = !(flags & FLG_OF_RELOBJ); 1973 Word cnt; 1974 1975 1976 /* 1977 * A relocatable object with a dynamic section is possible, though 1978 * rare. One use for this feature is to produce drivers 1979 * for the kernel, loaded by krtld. 1980 * 1981 * Only a limited subset of DT_ entries apply to relocatable 1982 * objects: 1983 * 1984 * DT_NEEDED 1985 * DT_RUNPATH/DT_RPATH 1986 * DT_FLAGS 1987 * DT_FLAGS1 1988 * DT_SUNW_STRPAD 1989 * DT_LDMACH 1990 */ 1991 1992 dynstr = ofl->ofl_dynstrtab; 1993 ofl->ofl_osdynamic->os_shdr->sh_link = 1994 /* LINTED */ 1995 (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 1996 1997 dyn = _dyn; 1998 1999 for (LIST_TRAVERSE(&ofl->ofl_sos, lnp, ifl)) { 2000 if ((ifl->ifl_flags & 2001 (FLG_IF_IGNORE | FLG_IF_DEPREQD)) == FLG_IF_IGNORE) 2002 continue; 2003 2004 /* 2005 * Create and set up the DT_POSFLAG_1 entry here if required. 2006 */ 2007 if ((ifl->ifl_flags & (FLG_IF_LAZYLD|FLG_IF_GRPPRM)) && 2008 (ifl->ifl_flags & (FLG_IF_NEEDED)) && not_relobj) { 2009 dyn->d_tag = DT_POSFLAG_1; 2010 if (ifl->ifl_flags & FLG_IF_LAZYLD) 2011 dyn->d_un.d_val = DF_P1_LAZYLOAD; 2012 if (ifl->ifl_flags & FLG_IF_GRPPRM) 2013 dyn->d_un.d_val |= DF_P1_GROUPPERM; 2014 dyn++; 2015 } 2016 2017 if (ifl->ifl_flags & (FLG_IF_NEEDED | FLG_IF_NEEDSTR)) 2018 dyn->d_tag = DT_NEEDED; 2019 else 2020 continue; 2021 2022 (void) st_setstring(dynstr, ifl->ifl_soname, &stoff); 2023 dyn->d_un.d_val = stoff; 2024 /* LINTED */ 2025 ifl->ifl_neededndx = (Half)(((uintptr_t)dyn - (uintptr_t)_dyn) / 2026 sizeof (Dyn)); 2027 dyn++; 2028 } 2029 2030 if (not_relobj) { 2031 if (ofl->ofl_dtsfltrs != NULL) { 2032 Dfltr_desc *dftp; 2033 Aliste idx; 2034 2035 for (ALIST_TRAVERSE(ofl->ofl_dtsfltrs, idx, dftp)) { 2036 if (dftp->dft_flag == FLG_SY_AUXFLTR) 2037 dyn->d_tag = DT_SUNW_AUXILIARY; 2038 else 2039 dyn->d_tag = DT_SUNW_FILTER; 2040 2041 (void) st_setstring(dynstr, dftp->dft_str, 2042 &stoff); 2043 dyn->d_un.d_val = stoff; 2044 dftp->dft_ndx = (Half)(((uintptr_t)dyn - 2045 (uintptr_t)_dyn) / sizeof (Dyn)); 2046 dyn++; 2047 } 2048 } 2049 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_INIT_U), 2050 SYM_NOHASH, 0, ofl)) != NULL) && 2051 (sdp->sd_ref == REF_REL_NEED) && 2052 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 2053 dyn->d_tag = DT_INIT; 2054 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2055 dyn++; 2056 } 2057 if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_FINI_U), 2058 SYM_NOHASH, 0, ofl)) != NULL) && 2059 (sdp->sd_ref == REF_REL_NEED) && 2060 (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 2061 dyn->d_tag = DT_FINI; 2062 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2063 dyn++; 2064 } 2065 if (ofl->ofl_soname) { 2066 dyn->d_tag = DT_SONAME; 2067 (void) st_setstring(dynstr, ofl->ofl_soname, &stoff); 2068 dyn->d_un.d_val = stoff; 2069 dyn++; 2070 } 2071 if (ofl->ofl_filtees) { 2072 if (flags & FLG_OF_AUX) { 2073 dyn->d_tag = DT_AUXILIARY; 2074 } else { 2075 dyn->d_tag = DT_FILTER; 2076 } 2077 (void) st_setstring(dynstr, ofl->ofl_filtees, &stoff); 2078 dyn->d_un.d_val = stoff; 2079 dyn++; 2080 } 2081 } 2082 2083 if (ofl->ofl_rpath) { 2084 (void) st_setstring(dynstr, ofl->ofl_rpath, &stoff); 2085 dyn->d_tag = DT_RUNPATH; 2086 dyn->d_un.d_val = stoff; 2087 dyn++; 2088 dyn->d_tag = DT_RPATH; 2089 dyn->d_un.d_val = stoff; 2090 dyn++; 2091 } 2092 2093 if (not_relobj) { 2094 if (ofl->ofl_config) { 2095 dyn->d_tag = DT_CONFIG; 2096 (void) st_setstring(dynstr, ofl->ofl_config, &stoff); 2097 dyn->d_un.d_val = stoff; 2098 dyn++; 2099 } 2100 if (ofl->ofl_depaudit) { 2101 dyn->d_tag = DT_DEPAUDIT; 2102 (void) st_setstring(dynstr, ofl->ofl_depaudit, &stoff); 2103 dyn->d_un.d_val = stoff; 2104 dyn++; 2105 } 2106 if (ofl->ofl_audit) { 2107 dyn->d_tag = DT_AUDIT; 2108 (void) st_setstring(dynstr, ofl->ofl_audit, &stoff); 2109 dyn->d_un.d_val = stoff; 2110 dyn++; 2111 } 2112 2113 dyn->d_tag = DT_HASH; 2114 dyn->d_un.d_ptr = ofl->ofl_oshash->os_shdr->sh_addr; 2115 dyn++; 2116 2117 shdr = ofl->ofl_osdynstr->os_shdr; 2118 dyn->d_tag = DT_STRTAB; 2119 dyn->d_un.d_ptr = shdr->sh_addr; 2120 dyn++; 2121 2122 dyn->d_tag = DT_STRSZ; 2123 dyn->d_un.d_ptr = shdr->sh_size; 2124 dyn++; 2125 2126 shdr = ofl->ofl_osdynsym->os_shdr; 2127 dyn->d_tag = DT_SYMTAB; 2128 dyn->d_un.d_ptr = shdr->sh_addr; 2129 dyn++; 2130 2131 dyn->d_tag = DT_SYMENT; 2132 dyn->d_un.d_ptr = shdr->sh_entsize; 2133 dyn++; 2134 2135 if (ofl->ofl_osldynsym) { 2136 /* 2137 * We have arranged for the .SUNW_ldynsym data to be 2138 * immediately in front of the .dynsym data. 2139 * This means that you could start at the top 2140 * of .SUNW_ldynsym and see the data for both tables 2141 * without a break. This is the view we want to 2142 * provide for DT_SUNW_SYMTAB, which is why we 2143 * add the lengths together. 2144 */ 2145 Shdr *lshdr = ofl->ofl_osldynsym->os_shdr; 2146 dyn->d_tag = DT_SUNW_SYMTAB; 2147 dyn->d_un.d_ptr = lshdr->sh_addr; 2148 dyn++; 2149 2150 dyn->d_tag = DT_SUNW_SYMSZ; 2151 dyn->d_un.d_val = lshdr->sh_size + shdr->sh_size; 2152 dyn++; 2153 } 2154 2155 if (ofl->ofl_osdynsymsort || ofl->ofl_osdyntlssort) { 2156 dyn->d_tag = DT_SUNW_SORTENT; 2157 dyn->d_un.d_val = sizeof (Word); 2158 dyn++; 2159 } 2160 2161 if (ofl->ofl_osdynsymsort) { 2162 dyn->d_tag = DT_SUNW_SYMSORT; 2163 dyn->d_un.d_ptr = 2164 ofl->ofl_osdynsymsort->os_shdr->sh_addr; 2165 dyn++; 2166 2167 dyn->d_tag = DT_SUNW_SYMSORTSZ; 2168 dyn->d_un.d_val = 2169 ofl->ofl_osdynsymsort->os_shdr->sh_size; 2170 dyn++; 2171 } 2172 2173 if (ofl->ofl_osdyntlssort) { 2174 dyn->d_tag = DT_SUNW_TLSSORT; 2175 dyn->d_un.d_ptr = 2176 ofl->ofl_osdyntlssort->os_shdr->sh_addr; 2177 dyn++; 2178 2179 dyn->d_tag = DT_SUNW_TLSSORTSZ; 2180 dyn->d_un.d_val = 2181 ofl->ofl_osdyntlssort->os_shdr->sh_size; 2182 dyn++; 2183 } 2184 2185 /* 2186 * Reserve the DT_CHECKSUM entry. Its value will be filled in 2187 * after the complete image is built. 2188 */ 2189 dyn->d_tag = DT_CHECKSUM; 2190 ofl->ofl_checksum = &dyn->d_un.d_val; 2191 dyn++; 2192 2193 /* 2194 * Versioning sections: DT_VERDEF and DT_VERNEED. 2195 * 2196 * The Solaris ld does not produce DT_VERSYM, but the GNU ld 2197 * does, in order to support their style of versioning, which 2198 * differs from ours: 2199 * 2200 * - The top bit of the 16-bit Versym index is 2201 * not part of the version, but is interpreted 2202 * as a "hidden bit". 2203 * 2204 * - External (SHN_UNDEF) symbols can have non-zero 2205 * Versym values, which specify versions in 2206 * referenced objects, via the Verneed section. 2207 * 2208 * - The vna_other field of the Vernaux structures 2209 * found in the Verneed section are not zero as 2210 * with Solaris, but instead contain the version 2211 * index to be used by Versym indices to reference 2212 * the given external version. 2213 * 2214 * The Solaris ld, rtld, and elfdump programs all interpret the 2215 * presence of DT_VERSYM as meaning that GNU versioning rules 2216 * apply to the given file. If DT_VERSYM is not present, 2217 * then Solaris versioning rules apply. If we should ever need 2218 * to change our ld so that it does issue DT_VERSYM, then 2219 * this rule for detecting GNU versioning will no longer work. 2220 * In that case, we will have to invent a way to explicitly 2221 * specify the style of versioning in use, perhaps via a 2222 * new dynamic entry named something like DT_SUNW_VERSIONSTYLE, 2223 * where the d_un.d_val value specifies which style is to be 2224 * used. 2225 */ 2226 if ((flags & (FLG_OF_VERDEF | FLG_OF_NOVERSEC)) == 2227 FLG_OF_VERDEF) { 2228 shdr = ofl->ofl_osverdef->os_shdr; 2229 dyn->d_tag = DT_VERDEF; 2230 dyn->d_un.d_ptr = shdr->sh_addr; 2231 dyn++; 2232 dyn->d_tag = DT_VERDEFNUM; 2233 dyn->d_un.d_ptr = shdr->sh_info; 2234 dyn++; 2235 } 2236 if ((flags & (FLG_OF_VERNEED | FLG_OF_NOVERSEC)) == 2237 FLG_OF_VERNEED) { 2238 shdr = ofl->ofl_osverneed->os_shdr; 2239 dyn->d_tag = DT_VERNEED; 2240 dyn->d_un.d_ptr = shdr->sh_addr; 2241 dyn++; 2242 dyn->d_tag = DT_VERNEEDNUM; 2243 dyn->d_un.d_ptr = shdr->sh_info; 2244 dyn++; 2245 } 2246 2247 if ((flags & FLG_OF_COMREL) && ofl->ofl_relocrelcnt) { 2248 dyn->d_tag = ld_targ.t_m.m_rel_dt_count; 2249 dyn->d_un.d_val = ofl->ofl_relocrelcnt; 2250 dyn++; 2251 } 2252 if (flags & FLG_OF_TEXTREL) { 2253 /* 2254 * Only the presence of this entry is used in this 2255 * implementation, not the value stored. 2256 */ 2257 dyn->d_tag = DT_TEXTREL; 2258 dyn->d_un.d_val = 0; 2259 dyn++; 2260 } 2261 2262 if (ofl->ofl_osfiniarray) { 2263 shdr = ofl->ofl_osfiniarray->os_shdr; 2264 2265 dyn->d_tag = DT_FINI_ARRAY; 2266 dyn->d_un.d_ptr = shdr->sh_addr; 2267 dyn++; 2268 2269 dyn->d_tag = DT_FINI_ARRAYSZ; 2270 dyn->d_un.d_val = shdr->sh_size; 2271 dyn++; 2272 } 2273 2274 if (ofl->ofl_osinitarray) { 2275 shdr = ofl->ofl_osinitarray->os_shdr; 2276 2277 dyn->d_tag = DT_INIT_ARRAY; 2278 dyn->d_un.d_ptr = shdr->sh_addr; 2279 dyn++; 2280 2281 dyn->d_tag = DT_INIT_ARRAYSZ; 2282 dyn->d_un.d_val = shdr->sh_size; 2283 dyn++; 2284 } 2285 2286 if (ofl->ofl_ospreinitarray) { 2287 shdr = ofl->ofl_ospreinitarray->os_shdr; 2288 2289 dyn->d_tag = DT_PREINIT_ARRAY; 2290 dyn->d_un.d_ptr = shdr->sh_addr; 2291 dyn++; 2292 2293 dyn->d_tag = DT_PREINIT_ARRAYSZ; 2294 dyn->d_un.d_val = shdr->sh_size; 2295 dyn++; 2296 } 2297 2298 if (ofl->ofl_pltcnt) { 2299 shdr = ofl->ofl_osplt->os_relosdesc->os_shdr; 2300 2301 dyn->d_tag = DT_PLTRELSZ; 2302 dyn->d_un.d_ptr = shdr->sh_size; 2303 dyn++; 2304 dyn->d_tag = DT_PLTREL; 2305 dyn->d_un.d_ptr = ld_targ.t_m.m_rel_dt_type; 2306 dyn++; 2307 dyn->d_tag = DT_JMPREL; 2308 dyn->d_un.d_ptr = shdr->sh_addr; 2309 dyn++; 2310 } 2311 if (ofl->ofl_pltpad) { 2312 shdr = ofl->ofl_osplt->os_shdr; 2313 2314 dyn->d_tag = DT_PLTPAD; 2315 if (ofl->ofl_pltcnt) { 2316 dyn->d_un.d_ptr = shdr->sh_addr + 2317 ld_targ.t_m.m_plt_reservsz + 2318 ofl->ofl_pltcnt * ld_targ.t_m.m_plt_entsize; 2319 } else 2320 dyn->d_un.d_ptr = shdr->sh_addr; 2321 dyn++; 2322 dyn->d_tag = DT_PLTPADSZ; 2323 dyn->d_un.d_val = ofl->ofl_pltpad * 2324 ld_targ.t_m.m_plt_entsize; 2325 dyn++; 2326 } 2327 if (ofl->ofl_relocsz) { 2328 dyn->d_tag = ld_targ.t_m.m_rel_dt_type; 2329 dyn->d_un.d_ptr = ofl->ofl_osrelhead->os_shdr->sh_addr; 2330 dyn++; 2331 dyn->d_tag = ld_targ.t_m.m_rel_dt_size; 2332 dyn->d_un.d_ptr = ofl->ofl_relocsz; 2333 dyn++; 2334 dyn->d_tag = ld_targ.t_m.m_rel_dt_ent; 2335 if (ofl->ofl_osrelhead->os_shdr->sh_type == SHT_REL) 2336 dyn->d_un.d_ptr = sizeof (Rel); 2337 else 2338 dyn->d_un.d_ptr = sizeof (Rela); 2339 dyn++; 2340 } 2341 if (ofl->ofl_ossyminfo) { 2342 shdr = ofl->ofl_ossyminfo->os_shdr; 2343 dyn->d_tag = DT_SYMINFO; 2344 dyn->d_un.d_ptr = shdr->sh_addr; 2345 dyn++; 2346 dyn->d_tag = DT_SYMINSZ; 2347 dyn->d_un.d_val = shdr->sh_size; 2348 dyn++; 2349 dyn->d_tag = DT_SYMINENT; 2350 dyn->d_un.d_val = sizeof (Syminfo); 2351 dyn++; 2352 } 2353 if (ofl->ofl_osmove) { 2354 Os_desc * osp; 2355 2356 dyn->d_tag = DT_MOVEENT; 2357 osp = ofl->ofl_osmove; 2358 dyn->d_un.d_val = osp->os_shdr->sh_entsize; 2359 dyn++; 2360 dyn->d_tag = DT_MOVESZ; 2361 dyn->d_un.d_val = osp->os_shdr->sh_size; 2362 dyn++; 2363 dyn->d_tag = DT_MOVETAB; 2364 dyn->d_un.d_val = osp->os_shdr->sh_addr; 2365 dyn++; 2366 } 2367 if (ofl->ofl_regsymcnt) { 2368 int ndx; 2369 2370 for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 2371 if ((sdp = ofl->ofl_regsyms[ndx]) == 0) 2372 continue; 2373 2374 dyn->d_tag = ld_targ.t_m.m_dt_register; 2375 dyn->d_un.d_val = sdp->sd_symndx; 2376 dyn++; 2377 } 2378 } 2379 2380 for (LIST_TRAVERSE(&ofl->ofl_rtldinfo, lnp, sdp)) { 2381 dyn->d_tag = DT_SUNW_RTLDINF; 2382 dyn->d_un.d_ptr = sdp->sd_sym->st_value; 2383 dyn++; 2384 } 2385 2386 if (ofl->ofl_osdynamic->os_sgdesc && 2387 (ofl->ofl_osdynamic->os_sgdesc->sg_phdr.p_flags & PF_W)) { 2388 if (ofl->ofl_osinterp) { 2389 dyn->d_tag = DT_DEBUG; 2390 dyn->d_un.d_ptr = 0; 2391 dyn++; 2392 } 2393 2394 dyn->d_tag = DT_FEATURE_1; 2395 if (ofl->ofl_osmove) 2396 dyn->d_un.d_val = 0; 2397 else 2398 dyn->d_un.d_val = DTF_1_PARINIT; 2399 dyn++; 2400 } 2401 2402 if (ofl->ofl_oscap) { 2403 dyn->d_tag = DT_SUNW_CAP; 2404 dyn->d_un.d_val = ofl->ofl_oscap->os_shdr->sh_addr; 2405 dyn++; 2406 } 2407 2408 if (flags & FLG_OF_SYMBOLIC) { 2409 dyn->d_tag = DT_SYMBOLIC; 2410 dyn->d_un.d_val = 0; 2411 dyn++; 2412 } 2413 } 2414 2415 dyn->d_tag = DT_FLAGS; 2416 dyn->d_un.d_val = ofl->ofl_dtflags; 2417 dyn++; 2418 2419 /* 2420 * If -Bdirect was specified, but some NODIRECT symbols were specified 2421 * via a mapfile, or -znodirect was used on the command line, then 2422 * clear the DF_1_DIRECT flag. The resultant object will use per-symbol 2423 * direct bindings rather than be enabled for global direct bindings. 2424 */ 2425 if (ofl->ofl_flags1 & FLG_OF1_NDIRECT) { 2426 ofl->ofl_dtflags_1 &= ~DF_1_DIRECT; 2427 ofl->ofl_dtflags_1 |= DF_1_NODIRECT; 2428 } 2429 2430 dyn->d_tag = DT_FLAGS_1; 2431 dyn->d_un.d_val = ofl->ofl_dtflags_1; 2432 dyn++; 2433 2434 dyn->d_tag = DT_SUNW_STRPAD; 2435 dyn->d_un.d_val = DYNSTR_EXTRA_PAD; 2436 dyn++; 2437 2438 dyn->d_tag = DT_SUNW_LDMACH; 2439 dyn->d_un.d_val = ld_sunw_ldmach(); 2440 dyn++; 2441 2442 (*ld_targ.t_mr.mr_mach_update_odynamic)(ofl, &dyn); 2443 2444 for (cnt = 1 + DYNAMIC_EXTRA_ELTS; cnt--; dyn++) { 2445 dyn->d_tag = DT_NULL; 2446 dyn->d_un.d_val = 0; 2447 } 2448 2449 /* 2450 * Ensure that we wrote the right number of entries. If not, 2451 * we either miscounted in make_dynamic(), or we did something wrong 2452 * in this function. 2453 */ 2454 assert((ofl->ofl_osdynamic->os_shdr->sh_size / 2455 ofl->ofl_osdynamic->os_shdr->sh_entsize) == 2456 ((uintptr_t)dyn - (uintptr_t)_dyn) / sizeof (*dyn)); 2457 2458 return (1); 2459 } 2460 2461 /* 2462 * Build the version definition section 2463 */ 2464 static int 2465 update_overdef(Ofl_desc *ofl) 2466 { 2467 Listnode *lnp1, *lnp2; 2468 Ver_desc *vdp, *_vdp; 2469 Verdef *vdf, *_vdf; 2470 int num = 0; 2471 Os_desc *strosp, *symosp; 2472 2473 /* 2474 * Traverse the version descriptors and update the version structures 2475 * to point to the dynstr name in preparation for building the version 2476 * section structure. 2477 */ 2478 for (LIST_TRAVERSE(&ofl->ofl_verdesc, lnp1, vdp)) { 2479 Sym_desc * sdp; 2480 2481 if (vdp->vd_flags & VER_FLG_BASE) { 2482 const char *name = vdp->vd_name; 2483 size_t stoff; 2484 2485 /* 2486 * Create a new string table entry to represent the base 2487 * version name (there is no corresponding symbol for 2488 * this). 2489 */ 2490 if (!(ofl->ofl_flags & FLG_OF_DYNAMIC)) { 2491 (void) st_setstring(ofl->ofl_strtab, 2492 name, &stoff); 2493 /* LINTED */ 2494 vdp->vd_name = (const char *)stoff; 2495 } else { 2496 (void) st_setstring(ofl->ofl_dynstrtab, 2497 name, &stoff); 2498 /* LINTED */ 2499 vdp->vd_name = (const char *)stoff; 2500 } 2501 } else { 2502 sdp = ld_sym_find(vdp->vd_name, vdp->vd_hash, 0, ofl); 2503 /* LINTED */ 2504 vdp->vd_name = (const char *) 2505 (uintptr_t)sdp->sd_sym->st_name; 2506 } 2507 } 2508 2509 _vdf = vdf = (Verdef *)ofl->ofl_osverdef->os_outdata->d_buf; 2510 2511 /* 2512 * Traverse the version descriptors and update the version section to 2513 * reflect each version and its associated dependencies. 2514 */ 2515 for (LIST_TRAVERSE(&ofl->ofl_verdesc, lnp1, vdp)) { 2516 Half cnt = 1; 2517 Verdaux * vdap, * _vdap; 2518 2519 _vdap = vdap = (Verdaux *)(vdf + 1); 2520 2521 vdf->vd_version = VER_DEF_CURRENT; 2522 vdf->vd_flags = vdp->vd_flags & MSK_VER_USER; 2523 vdf->vd_ndx = vdp->vd_ndx; 2524 vdf->vd_hash = vdp->vd_hash; 2525 2526 /* LINTED */ 2527 vdap->vda_name = (uintptr_t)vdp->vd_name; 2528 vdap++; 2529 /* LINTED */ 2530 _vdap->vda_next = (Word)((uintptr_t)vdap - (uintptr_t)_vdap); 2531 2532 /* 2533 * Traverse this versions dependency list generating the 2534 * appropriate version dependency entries. 2535 */ 2536 for (LIST_TRAVERSE(&vdp->vd_deps, lnp2, _vdp)) { 2537 /* LINTED */ 2538 vdap->vda_name = (uintptr_t)_vdp->vd_name; 2539 _vdap = vdap; 2540 vdap++, cnt++; 2541 /* LINTED */ 2542 _vdap->vda_next = (Word)((uintptr_t)vdap - 2543 (uintptr_t)_vdap); 2544 } 2545 _vdap->vda_next = 0; 2546 2547 /* 2548 * Record the versions auxiliary array offset and the associated 2549 * dependency count. 2550 */ 2551 /* LINTED */ 2552 vdf->vd_aux = (Word)((uintptr_t)(vdf + 1) - (uintptr_t)vdf); 2553 vdf->vd_cnt = cnt; 2554 2555 /* 2556 * Record the next versions offset and update the version 2557 * pointer. Remember the previous version offset as the very 2558 * last structures next pointer should be null. 2559 */ 2560 _vdf = vdf; 2561 vdf = (Verdef *)vdap, num++; 2562 /* LINTED */ 2563 _vdf->vd_next = (Word)((uintptr_t)vdf - (uintptr_t)_vdf); 2564 } 2565 _vdf->vd_next = 0; 2566 2567 /* 2568 * Record the string table association with the version definition 2569 * section, and the symbol table associated with the version symbol 2570 * table (the actual contents of the version symbol table are filled 2571 * in during symbol update). 2572 */ 2573 if ((ofl->ofl_flags & FLG_OF_RELOBJ) || 2574 (ofl->ofl_flags & FLG_OF_STATIC)) { 2575 strosp = ofl->ofl_osstrtab; 2576 symosp = ofl->ofl_ossymtab; 2577 } else { 2578 strosp = ofl->ofl_osdynstr; 2579 symosp = ofl->ofl_osdynsym; 2580 } 2581 /* LINTED */ 2582 ofl->ofl_osverdef->os_shdr->sh_link = (Word)elf_ndxscn(strosp->os_scn); 2583 /* LINTED */ 2584 ofl->ofl_osversym->os_shdr->sh_link = (Word)elf_ndxscn(symosp->os_scn); 2585 2586 /* 2587 * The version definition sections `info' field is used to indicate the 2588 * number of entries in this section. 2589 */ 2590 ofl->ofl_osverdef->os_shdr->sh_info = num; 2591 2592 return (1); 2593 } 2594 2595 /* 2596 * Build the version needed section 2597 */ 2598 static int 2599 update_overneed(Ofl_desc *ofl) 2600 { 2601 Listnode *lnp; 2602 Ifl_desc *ifl; 2603 Verneed *vnd, *_vnd; 2604 Str_tbl *dynstr; 2605 Word num = 0, cnt = 0; 2606 2607 dynstr = ofl->ofl_dynstrtab; 2608 _vnd = vnd = (Verneed *)ofl->ofl_osverneed->os_outdata->d_buf; 2609 2610 /* 2611 * Traverse the shared object list looking for dependencies that have 2612 * versions defined within them. 2613 */ 2614 for (LIST_TRAVERSE(&ofl->ofl_sos, lnp, ifl)) { 2615 Half _cnt; 2616 Vernaux *_vnap, *vnap; 2617 Sdf_desc *sdf = ifl->ifl_sdfdesc; 2618 size_t stoff; 2619 2620 if (!(ifl->ifl_flags & FLG_IF_VERNEED)) 2621 continue; 2622 2623 vnd->vn_version = VER_NEED_CURRENT; 2624 2625 (void) st_setstring(dynstr, ifl->ifl_soname, &stoff); 2626 vnd->vn_file = stoff; 2627 2628 _vnap = vnap = (Vernaux *)(vnd + 1); 2629 2630 if (sdf && (sdf->sdf_flags & FLG_SDF_SPECVER)) { 2631 Sdv_desc *sdv; 2632 Listnode *lnp2; 2633 2634 /* 2635 * If version needed definitions were specified in 2636 * a mapfile ($VERSION=*) then record those 2637 * definitions. 2638 */ 2639 for (LIST_TRAVERSE(&sdf->sdf_verneed, lnp2, sdv)) { 2640 (void) st_setstring(dynstr, sdv->sdv_name, 2641 &stoff); 2642 vnap->vna_name = stoff; 2643 /* LINTED */ 2644 vnap->vna_hash = (Word)elf_hash(sdv->sdv_name); 2645 vnap->vna_flags = 0; 2646 vnap->vna_other = 0; 2647 _vnap = vnap; 2648 vnap++; 2649 cnt++; 2650 /* LINTED */ 2651 _vnap->vna_next = (Word)((uintptr_t)vnap - 2652 (uintptr_t)_vnap); 2653 } 2654 } else { 2655 2656 /* 2657 * Traverse the version index list recording 2658 * each version as a needed dependency. 2659 */ 2660 for (cnt = _cnt = 0; _cnt <= ifl->ifl_vercnt; 2661 _cnt++) { 2662 Ver_index *vip = &ifl->ifl_verndx[_cnt]; 2663 2664 if (vip->vi_flags & FLG_VER_REFER) { 2665 (void) st_setstring(dynstr, 2666 vip->vi_name, &stoff); 2667 vnap->vna_name = stoff; 2668 2669 if (vip->vi_desc) { 2670 vnap->vna_hash = 2671 vip->vi_desc->vd_hash; 2672 vnap->vna_flags = 2673 vip->vi_desc->vd_flags; 2674 } else { 2675 vnap->vna_hash = 0; 2676 vnap->vna_flags = 0; 2677 } 2678 vnap->vna_other = 0; 2679 2680 _vnap = vnap; 2681 vnap++, cnt++; 2682 _vnap->vna_next = 2683 /* LINTED */ 2684 (Word)((uintptr_t)vnap - 2685 (uintptr_t)_vnap); 2686 } 2687 } 2688 } 2689 _vnap->vna_next = 0; 2690 2691 /* 2692 * Record the versions auxiliary array offset and 2693 * the associated dependency count. 2694 */ 2695 /* LINTED */ 2696 vnd->vn_aux = (Word)((uintptr_t)(vnd + 1) - (uintptr_t)vnd); 2697 /* LINTED */ 2698 vnd->vn_cnt = (Half)cnt; 2699 2700 /* 2701 * Record the next versions offset and update the version 2702 * pointer. Remember the previous version offset as the very 2703 * last structures next pointer should be null. 2704 */ 2705 _vnd = vnd; 2706 vnd = (Verneed *)vnap, num++; 2707 /* LINTED */ 2708 _vnd->vn_next = (Word)((uintptr_t)vnd - (uintptr_t)_vnd); 2709 } 2710 _vnd->vn_next = 0; 2711 2712 /* 2713 * Record association on string table section and use the 2714 * `info' field to indicate the number of entries in this 2715 * section. 2716 */ 2717 ofl->ofl_osverneed->os_shdr->sh_link = 2718 /* LINTED */ 2719 (Word)elf_ndxscn(ofl->ofl_osdynstr->os_scn); 2720 ofl->ofl_osverneed->os_shdr->sh_info = num; 2721 2722 return (1); 2723 } 2724 2725 2726 /* 2727 * Update syminfo section. 2728 */ 2729 static uintptr_t 2730 update_osyminfo(Ofl_desc * ofl) 2731 { 2732 Os_desc * symosp, * infosp = ofl->ofl_ossyminfo; 2733 Syminfo * sip = infosp->os_outdata->d_buf; 2734 Shdr * shdr = infosp->os_shdr; 2735 char *strtab; 2736 Listnode * lnp; 2737 Sym_desc * sdp; 2738 Aliste idx; 2739 Sfltr_desc * sftp; 2740 2741 if (ofl->ofl_flags & FLG_OF_RELOBJ) { 2742 symosp = ofl->ofl_ossymtab; 2743 strtab = ofl->ofl_osstrtab->os_outdata->d_buf; 2744 } else { 2745 symosp = ofl->ofl_osdynsym; 2746 strtab = ofl->ofl_osdynstr->os_outdata->d_buf; 2747 } 2748 2749 /* LINTED */ 2750 infosp->os_shdr->sh_link = (Word)elf_ndxscn(symosp->os_scn); 2751 if (ofl->ofl_osdynamic) 2752 infosp->os_shdr->sh_info = 2753 /* LINTED */ 2754 (Word)elf_ndxscn(ofl->ofl_osdynamic->os_scn); 2755 2756 /* 2757 * Update any references with the index into the dynamic table. 2758 */ 2759 for (LIST_TRAVERSE(&ofl->ofl_syminfsyms, lnp, sdp)) { 2760 Ifl_desc * ifl; 2761 if (sdp->sd_aux && sdp->sd_aux->sa_bindto) 2762 ifl = sdp->sd_aux->sa_bindto; 2763 else 2764 ifl = sdp->sd_file; 2765 sip[sdp->sd_symndx].si_boundto = ifl->ifl_neededndx; 2766 } 2767 2768 /* 2769 * Update any filtee references with the index into the dynamic table. 2770 */ 2771 for (ALIST_TRAVERSE(ofl->ofl_symfltrs, idx, sftp)) { 2772 Dfltr_desc *dftp; 2773 2774 dftp = alist_item(ofl->ofl_dtsfltrs, sftp->sft_idx); 2775 sip[sftp->sft_sdp->sd_symndx].si_boundto = dftp->dft_ndx; 2776 } 2777 2778 /* 2779 * Display debugging information about section. 2780 */ 2781 DBG_CALL(Dbg_syminfo_title(ofl->ofl_lml)); 2782 if (DBG_ENABLED) { 2783 Word _cnt, cnt = shdr->sh_size / shdr->sh_entsize; 2784 Sym * symtab = symosp->os_outdata->d_buf; 2785 Dyn * dyn; 2786 2787 if (ofl->ofl_osdynamic) 2788 dyn = ofl->ofl_osdynamic->os_outdata->d_buf; 2789 else 2790 dyn = 0; 2791 2792 for (_cnt = 1; _cnt < cnt; _cnt++) { 2793 if (sip[_cnt].si_flags || sip[_cnt].si_boundto) 2794 /* LINTED */ 2795 DBG_CALL(Dbg_syminfo_entry(ofl->ofl_lml, _cnt, 2796 &sip[_cnt], &symtab[_cnt], strtab, dyn)); 2797 } 2798 } 2799 return (1); 2800 } 2801 2802 /* 2803 * Build the output elf header. 2804 */ 2805 static uintptr_t 2806 update_oehdr(Ofl_desc * ofl) 2807 { 2808 Ehdr *ehdr = ofl->ofl_nehdr; 2809 2810 /* 2811 * If an entry point symbol has already been established (refer 2812 * sym_validate()) simply update the elf header entry point with the 2813 * symbols value. If no entry point is defined it will have been filled 2814 * with the start address of the first section within the text segment 2815 * (refer update_outfile()). 2816 */ 2817 if (ofl->ofl_entry) 2818 ehdr->e_entry = 2819 ((Sym_desc *)(ofl->ofl_entry))->sd_sym->st_value; 2820 2821 /* 2822 * Note. it may be necessary to update the `e_flags' field in the 2823 * machine dependent section. 2824 */ 2825 ehdr->e_ident[EI_DATA] = ld_targ.t_m.m_data; 2826 ehdr->e_machine = ofl->ofl_dehdr->e_machine; 2827 ehdr->e_flags = ofl->ofl_dehdr->e_flags; 2828 ehdr->e_version = ofl->ofl_dehdr->e_version; 2829 2830 if (ehdr->e_machine != ld_targ.t_m.m_mach) { 2831 if (ehdr->e_machine != ld_targ.t_m.m_machplus) 2832 return (S_ERROR); 2833 if ((ehdr->e_flags & ld_targ.t_m.m_flagsplus) == 0) 2834 return (S_ERROR); 2835 } 2836 2837 if (ofl->ofl_flags & FLG_OF_SHAROBJ) 2838 ehdr->e_type = ET_DYN; 2839 else if (ofl->ofl_flags & FLG_OF_RELOBJ) 2840 ehdr->e_type = ET_REL; 2841 else 2842 ehdr->e_type = ET_EXEC; 2843 2844 return (1); 2845 } 2846 2847 /* 2848 * Perform move table expansion. 2849 */ 2850 static uintptr_t 2851 expand_move(Ofl_desc *ofl, Sym_desc *sdp, Move *u1) 2852 { 2853 Move *mv; 2854 Os_desc *osp; 2855 unsigned char *taddr, *taddr0; 2856 Sxword offset; 2857 int i; 2858 Addr base1; 2859 unsigned int stride; 2860 2861 osp = ofl->ofl_issunwdata1->is_osdesc; 2862 base1 = (Addr)(osp->os_shdr->sh_addr + 2863 ofl->ofl_issunwdata1->is_indata->d_off); 2864 taddr0 = taddr = osp->os_outdata->d_buf; 2865 mv = u1; 2866 2867 offset = sdp->sd_sym->st_value - base1; 2868 taddr += offset; 2869 taddr = taddr + mv->m_poffset; 2870 for (i = 0; i < mv->m_repeat; i++) { 2871 /* LINTED */ 2872 DBG_CALL(Dbg_move_expand(ofl->ofl_lml, mv, 2873 (Addr)(taddr - taddr0))); 2874 stride = (unsigned int)mv->m_stride + 1; 2875 /* LINTED */ 2876 switch (ELF_M_SIZE(mv->m_info)) { 2877 case 1: 2878 /* LINTED */ 2879 *taddr = (unsigned char)mv->m_value; 2880 taddr += stride; 2881 break; 2882 case 2: 2883 /* LINTED */ 2884 *((Half *)taddr) = (Half)mv->m_value; 2885 taddr += 2*stride; 2886 break; 2887 case 4: 2888 /* LINTED */ 2889 *((Word *)taddr) = (Word)mv->m_value; 2890 taddr += 4*stride; 2891 break; 2892 case 8: 2893 /* LINTED */ 2894 *((unsigned long long *)taddr) = mv->m_value; 2895 taddr += 8*stride; 2896 break; 2897 default: 2898 /* 2899 * Should never come here since this is already 2900 * checked at sunwmove_preprocess(). 2901 */ 2902 return (S_ERROR); 2903 } 2904 } 2905 return (1); 2906 } 2907 2908 /* 2909 * Update Move sections. 2910 */ 2911 static uintptr_t 2912 update_move(Ofl_desc *ofl) 2913 { 2914 Word ndx = 0; 2915 Is_desc * isp; 2916 ofl_flag_t flags = ofl->ofl_flags; 2917 Move * mv1, * mv2; 2918 Listnode * lnp1; 2919 Psym_info * psym; 2920 2921 /* 2922 * Determine the index of the symbol table that will be referenced by 2923 * the relocation entries. 2924 */ 2925 if (OFL_ALLOW_DYNSYM(ofl)) 2926 /* LINTED */ 2927 ndx = (Word) elf_ndxscn(ofl->ofl_osdynsym->os_scn); 2928 else if (!(flags & FLG_OF_STRIP) || (flags & FLG_OF_RELOBJ)) 2929 /* LINTED */ 2930 ndx = (Word) elf_ndxscn(ofl->ofl_ossymtab->os_scn); 2931 2932 /* 2933 * update sh_link and mv pointer for updating move table. 2934 */ 2935 if (ofl->ofl_osmove) { 2936 ofl->ofl_osmove->os_shdr->sh_link = ndx; 2937 mv1 = (Move *) ofl->ofl_osmove->os_outdata->d_buf; 2938 } 2939 2940 /* 2941 * Update symbol entry index 2942 */ 2943 for (LIST_TRAVERSE(&ofl->ofl_parsym, lnp1, psym)) { 2944 Listnode * lnp2; 2945 Mv_itm * mvp; 2946 Sym_desc *sdp; 2947 2948 /* 2949 * Expand move table 2950 */ 2951 if (psym->psym_symd->sd_flags & FLG_SY_PAREXPN) { 2952 const char *s; 2953 2954 if (flags & FLG_OF_STATIC) 2955 s = MSG_INTL(MSG_PSYM_EXPREASON1); 2956 else if (ofl->ofl_flags1 & FLG_OF1_NOPARTI) 2957 s = MSG_INTL(MSG_PSYM_EXPREASON2); 2958 else 2959 s = MSG_INTL(MSG_PSYM_EXPREASON3); 2960 DBG_CALL(Dbg_move_parexpn(ofl->ofl_lml, 2961 psym->psym_symd->sd_name, s)); 2962 for (LIST_TRAVERSE(&(psym->psym_mvs), lnp2, mvp)) { 2963 if ((mvp->mv_flag & FLG_MV_OUTSECT) == 0) 2964 continue; 2965 mv2 = mvp->mv_ientry; 2966 sdp = psym->psym_symd; 2967 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 0, 2968 mv2, sdp)); 2969 (void) expand_move(ofl, sdp, mv2); 2970 } 2971 continue; 2972 } 2973 2974 /* 2975 * Process move table 2976 */ 2977 DBG_CALL(Dbg_move_outmove(ofl->ofl_lml, 2978 psym->psym_symd->sd_name)); 2979 for (LIST_TRAVERSE(&(psym->psym_mvs), lnp2, mvp)) { 2980 int idx = 1; 2981 Sym *sym; 2982 2983 if ((mvp->mv_flag & FLG_MV_OUTSECT) == 0) 2984 continue; 2985 2986 isp = mvp->mv_isp; 2987 mv2 = mvp->mv_ientry; 2988 sdp = isp->is_file->ifl_oldndx[ELF_M_SYM(mv2->m_info)]; 2989 sym = sdp->sd_sym; 2990 2991 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 0, mv2, sdp)); 2992 2993 *mv1 = *mv2; 2994 if ((flags & FLG_OF_RELOBJ) == 0) { 2995 if (ELF_ST_BIND(sym->st_info) == STB_LOCAL) { 2996 Half symbssndx = ofl->ofl_isbss-> 2997 is_osdesc->os_scnsymndx; 2998 2999 mv1->m_info = 3000 /* LINTED */ 3001 ELF_M_INFO(symbssndx, mv2->m_info); 3002 3003 if (ELF_ST_TYPE(sym->st_info) != 3004 STT_SECTION) { 3005 mv1->m_poffset = sym->st_value - 3006 ofl->ofl_isbss->is_osdesc-> 3007 os_shdr->sh_addr + 3008 mv2->m_poffset; 3009 } 3010 } else { 3011 mv1->m_info = 3012 /* LINTED */ 3013 ELF_M_INFO(sdp->sd_symndx, 3014 mv2->m_info); 3015 } 3016 } else { 3017 Boolean isredloc = FALSE; 3018 3019 if ((ELF_ST_BIND(sym->st_info) == STB_LOCAL) && 3020 (ofl->ofl_flags & FLG_OF_REDLSYM)) 3021 isredloc = TRUE; 3022 3023 if (isredloc && !(sdp->sd_psyminfo)) { 3024 Word symndx = sdp->sd_isc-> 3025 is_osdesc->os_scnsymndx; 3026 3027 mv1->m_info = 3028 /* LINTED */ 3029 ELF_M_INFO(symndx, mv2->m_info); 3030 mv1->m_poffset += sym->st_value; 3031 } else { 3032 if (isredloc) 3033 DBG_CALL(Dbg_syms_reduce(ofl, 3034 DBG_SYM_REDUCE_RETAIN, sdp, 3035 idx, 3036 ofl->ofl_osmove->os_name)); 3037 3038 mv1->m_info = 3039 /* LINTED */ 3040 ELF_M_INFO(sdp->sd_symndx, 3041 mv2->m_info); 3042 } 3043 } 3044 DBG_CALL(Dbg_move_entry1(ofl->ofl_lml, 1, mv1, sdp)); 3045 mv1++; 3046 idx++; 3047 } 3048 } 3049 return (1); 3050 } 3051 3052 3053 /* 3054 * Scan through the SHT_GROUP output sections. Update their 3055 * sh_link/sh_info fields as well as the section contents. 3056 */ 3057 static uintptr_t 3058 update_ogroup(Ofl_desc * ofl) 3059 { 3060 Listnode *lnp; 3061 Os_desc *osp; 3062 uintptr_t error = 0; 3063 3064 for (LIST_TRAVERSE(&ofl->ofl_osgroups, lnp, osp)) { 3065 Is_desc *isp; 3066 Ifl_desc *ifl; 3067 Shdr *shdr = osp->os_shdr; 3068 Sym_desc *sdp; 3069 Xword i, grpcnt; 3070 Word *gdata; 3071 3072 /* 3073 * Since input GROUP sections always create unique 3074 * output GROUP sections - we know there is only one 3075 * item on the list. 3076 */ 3077 isp = (Is_desc *)osp->os_isdescs.head->data; 3078 3079 ifl = isp->is_file; 3080 sdp = ifl->ifl_oldndx[isp->is_shdr->sh_info]; 3081 shdr->sh_link = (Word)elf_ndxscn(ofl->ofl_ossymtab->os_scn); 3082 shdr->sh_info = sdp->sd_symndx; 3083 3084 /* 3085 * Scan through the group data section and update 3086 * all of the links to new values. 3087 */ 3088 grpcnt = shdr->sh_size / shdr->sh_entsize; 3089 gdata = (Word *)osp->os_outdata->d_buf; 3090 for (i = 1; i < grpcnt; i++) { 3091 Is_desc * _isp; 3092 Os_desc * _osp; 3093 3094 /* 3095 * Perform a sanity check that the section index 3096 * stored in the SHT_GROUP section is valid 3097 * for the file it came from. 3098 */ 3099 if (gdata[i] >= ifl->ifl_shnum) { 3100 eprintf(ofl->ofl_lml, ERR_FATAL, 3101 MSG_INTL(MSG_GRP_INVALNDX), isp->is_name, 3102 ifl->ifl_name, i, gdata[i]); 3103 error = S_ERROR; 3104 gdata[i] = 0; 3105 continue; 3106 } 3107 3108 _isp = ifl->ifl_isdesc[gdata[i]]; 3109 3110 /* 3111 * If the referenced section didn't make it to the 3112 * output file - just zero out the entry. 3113 */ 3114 if ((_osp = _isp->is_osdesc) == 0) 3115 gdata[i] = 0; 3116 else 3117 gdata[i] = (Word)elf_ndxscn(_osp->os_scn); 3118 } 3119 } 3120 return (error); 3121 } 3122 3123 static void 3124 update_ostrtab(Os_desc *osp, Str_tbl *stp, uint_t extra) 3125 { 3126 Elf_Data *data; 3127 3128 if (osp == 0) 3129 return; 3130 3131 data = osp->os_outdata; 3132 assert(data->d_size == (st_getstrtab_sz(stp) + extra)); 3133 (void) st_setstrbuf(stp, data->d_buf, data->d_size - extra); 3134 /* If leaving an extra hole at the end, zero it */ 3135 if (extra > 0) 3136 (void) memset((char *)data->d_buf + data->d_size - extra, 3137 0x0, extra); 3138 } 3139 3140 /* 3141 * Translate the shdr->sh_{link, info} from its input section value to that 3142 * of the corresponding shdr->sh_{link, info} output section value. 3143 */ 3144 static Word 3145 translate_link(Ofl_desc *ofl, Os_desc *osp, Word link, const char *msg) 3146 { 3147 Is_desc * isp; 3148 Ifl_desc * ifl; 3149 3150 /* 3151 * Don't translate the special section numbers. 3152 */ 3153 if (link >= SHN_LORESERVE) 3154 return (link); 3155 3156 /* 3157 * Does this output section translate back to an input file. If not 3158 * then there is no translation to do. In this case we will assume that 3159 * if sh_link has a value, it's the right value. 3160 */ 3161 isp = (Is_desc *)osp->os_isdescs.head->data; 3162 if ((ifl = isp->is_file) == NULL) 3163 return (link); 3164 3165 /* 3166 * Sanity check to make sure that the sh_{link, info} value 3167 * is within range for the input file. 3168 */ 3169 if (link >= ifl->ifl_shnum) { 3170 eprintf(ofl->ofl_lml, ERR_WARNING, msg, ifl->ifl_name, 3171 isp->is_name, EC_XWORD(link)); 3172 return (link); 3173 } 3174 3175 /* 3176 * Follow the link to the input section. 3177 */ 3178 if ((isp = ifl->ifl_isdesc[link]) == 0) 3179 return (0); 3180 if ((osp = isp->is_osdesc) == 0) 3181 return (0); 3182 3183 /* LINTED */ 3184 return ((Word)elf_ndxscn(osp->os_scn)); 3185 } 3186 3187 /* 3188 * Having created all of the necessary sections, segments, and associated 3189 * headers, fill in the program headers and update any other data in the 3190 * output image. Some general rules: 3191 * 3192 * o If an interpreter is required always generate a PT_PHDR entry as 3193 * well. It is this entry that triggers the kernel into passing the 3194 * interpreter an aux vector instead of just a file descriptor. 3195 * 3196 * o When generating an image that will be interpreted (ie. a dynamic 3197 * executable, a shared object, or a static executable that has been 3198 * provided with an interpreter - weird, but possible), make the initial 3199 * loadable segment include both the ehdr and phdr[]. Both of these 3200 * tables are used by the interpreter therefore it seems more intuitive 3201 * to explicitly defined them as part of the mapped image rather than 3202 * relying on page rounding by the interpreter to allow their access. 3203 * 3204 * o When generating a static image that does not require an interpreter 3205 * have the first loadable segment indicate the address of the first 3206 * .section as the start address (things like /kernel/unix and ufsboot 3207 * expect this behavior). 3208 */ 3209 uintptr_t 3210 ld_update_outfile(Ofl_desc *ofl) 3211 { 3212 Addr size, etext, vaddr = ofl->ofl_segorigin; 3213 Listnode *lnp1, *lnp2; 3214 Sg_desc *sgp, *dtracesgp = 0, *capsgp = 0; 3215 Os_desc *osp; 3216 int phdrndx = 0, segndx = -1, secndx; 3217 int dtracepndx, dtracesndx, cappndx, capsndx; 3218 Ehdr *ehdr = ofl->ofl_nehdr; 3219 Shdr *hshdr; 3220 Phdr *_phdr = 0; 3221 Word phdrsz = (ehdr->e_phnum * ehdr->e_phentsize), shscnndx; 3222 ofl_flag_t flags = ofl->ofl_flags; 3223 Word ehdrsz = ehdr->e_ehsize; 3224 Boolean nobits; 3225 Off offset; 3226 Aliste idx; 3227 3228 /* 3229 * Loop through the segment descriptors and pick out what we need. 3230 */ 3231 DBG_CALL(Dbg_seg_title(ofl->ofl_lml)); 3232 for (LIST_TRAVERSE(&ofl->ofl_segs, lnp1, sgp)) { 3233 Phdr *phdr = &(sgp->sg_phdr); 3234 Xword p_align; 3235 3236 segndx++; 3237 3238 /* 3239 * If an interpreter is required generate a PT_INTERP and 3240 * PT_PHDR program header entry. The PT_PHDR entry describes 3241 * the program header table itself. This information will be 3242 * passed via the aux vector to the interpreter (ld.so.1). 3243 * The program header array is actually part of the first 3244 * loadable segment (and the PT_PHDR entry is the first entry), 3245 * therefore its virtual address isn't known until the first 3246 * loadable segment is processed. 3247 */ 3248 if (phdr->p_type == PT_PHDR) { 3249 if (ofl->ofl_osinterp) { 3250 phdr->p_offset = ehdr->e_phoff; 3251 phdr->p_filesz = phdr->p_memsz = phdrsz; 3252 3253 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3254 ofl->ofl_phdr[phdrndx++] = *phdr; 3255 } 3256 continue; 3257 } 3258 if (phdr->p_type == PT_INTERP) { 3259 if (ofl->ofl_osinterp) { 3260 Shdr *shdr = ofl->ofl_osinterp->os_shdr; 3261 3262 phdr->p_vaddr = phdr->p_memsz = 0; 3263 phdr->p_offset = shdr->sh_offset; 3264 phdr->p_filesz = shdr->sh_size; 3265 3266 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3267 ofl->ofl_phdr[phdrndx++] = *phdr; 3268 } 3269 continue; 3270 } 3271 3272 /* 3273 * If we are creating a PT_SUNWDTRACE segment, remember where 3274 * the program header is. The header values are assigned after 3275 * update_osym() has completed and the symbol table addresses 3276 * have been udpated. 3277 */ 3278 if (phdr->p_type == PT_SUNWDTRACE) { 3279 if ((ofl->ofl_dtracesym) && 3280 ((flags & FLG_OF_RELOBJ) == 0)) { 3281 dtracesgp = sgp; 3282 dtracesndx = segndx; 3283 dtracepndx = phdrndx++; 3284 } 3285 continue; 3286 } 3287 3288 /* 3289 * If a hardware/software capabilities section is required, 3290 * generate the PT_SUNWCAP header. Note, as this comes before 3291 * the first loadable segment, we don't yet know its real 3292 * virtual address. This is updated later. 3293 */ 3294 if (phdr->p_type == PT_SUNWCAP) { 3295 if (ofl->ofl_oscap) { 3296 capsgp = sgp; 3297 capsndx = segndx; 3298 cappndx = phdrndx++; 3299 } 3300 continue; 3301 } 3302 3303 /* 3304 * As the dynamic program header occurs after the loadable 3305 * headers in the segment descriptor table, all the address 3306 * information for the .dynamic output section will have been 3307 * figured out by now. 3308 */ 3309 if (phdr->p_type == PT_DYNAMIC) { 3310 if (OFL_ALLOW_DYNSYM(ofl)) { 3311 Shdr *shdr = ofl->ofl_osdynamic->os_shdr; 3312 3313 phdr->p_vaddr = shdr->sh_addr; 3314 phdr->p_offset = shdr->sh_offset; 3315 phdr->p_filesz = shdr->sh_size; 3316 phdr->p_flags = ld_targ.t_m.m_dataseg_perm; 3317 3318 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3319 ofl->ofl_phdr[phdrndx++] = *phdr; 3320 } 3321 continue; 3322 } 3323 3324 /* 3325 * As the AMD unwind program header occurs after the loadable 3326 * headers in the segment descriptor table, all the address 3327 * information for the .eh_frame output section will have been 3328 * figured out by now. 3329 */ 3330 #if defined(_ELF64) 3331 if ((ld_targ.t_m.m_mach == EM_AMD64) && 3332 (phdr->p_type == PT_SUNW_UNWIND)) { 3333 Shdr *shdr; 3334 3335 if (ofl->ofl_unwindhdr == 0) 3336 continue; 3337 3338 shdr = ofl->ofl_unwindhdr->os_shdr; 3339 3340 phdr->p_flags = PF_R; 3341 phdr->p_vaddr = shdr->sh_addr; 3342 phdr->p_memsz = shdr->sh_size; 3343 phdr->p_filesz = shdr->sh_size; 3344 phdr->p_offset = shdr->sh_offset; 3345 phdr->p_align = shdr->sh_addralign; 3346 phdr->p_paddr = 0; 3347 ofl->ofl_phdr[phdrndx++] = *phdr; 3348 continue; 3349 } 3350 #endif 3351 /* 3352 * As the TLS program header occurs after the loadable 3353 * headers in the segment descriptor table, all the address 3354 * information for the .tls output section will have been 3355 * figured out by now. 3356 */ 3357 if (phdr->p_type == PT_TLS) { 3358 Os_desc *tlsosp; 3359 Shdr *firstshdr = 0, *lastfileshdr = 0, *lastshdr; 3360 3361 if (ofl->ofl_ostlsseg.head == NULL) 3362 continue; 3363 3364 /* 3365 * Scan through the sections that have contributed TLS. 3366 * Remember the first and last so as to determine the 3367 * TLS memory size requirement. Remember the last 3368 * non-nobits section to determine the TLS data 3369 * contribution, which determines the TLS file size. 3370 */ 3371 for (LIST_TRAVERSE(&ofl->ofl_ostlsseg, lnp2, tlsosp)) { 3372 Shdr *tlsshdr = tlsosp->os_shdr; 3373 3374 if (firstshdr == 0) 3375 firstshdr = tlsshdr; 3376 if (tlsshdr->sh_type != SHT_NOBITS) 3377 lastfileshdr = tlsshdr; 3378 lastshdr = tlsshdr; 3379 } 3380 3381 phdr->p_flags = PF_R | PF_W; 3382 phdr->p_vaddr = firstshdr->sh_addr; 3383 phdr->p_offset = firstshdr->sh_offset; 3384 phdr->p_align = firstshdr->sh_addralign; 3385 3386 if (lastfileshdr) 3387 phdr->p_filesz = lastfileshdr->sh_offset + 3388 lastfileshdr->sh_size - phdr->p_offset; 3389 else 3390 phdr->p_filesz = 0; 3391 3392 phdr->p_memsz = lastshdr->sh_offset + 3393 lastshdr->sh_size - phdr->p_offset; 3394 3395 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3396 ofl->ofl_phdr[phdrndx] = *phdr; 3397 ofl->ofl_tlsphdr = &ofl->ofl_phdr[phdrndx++]; 3398 continue; 3399 } 3400 3401 /* 3402 * If this is an empty segment declaration, it will occur after 3403 * all other loadable segments. As empty segments can be 3404 * defind with fixed addresses, make sure that no loadable 3405 * segments overlap. This might occur as the object evolves 3406 * and the loadable segments grow, thus encroaching upon an 3407 * existing segment reservation. 3408 * 3409 * Segments are only created for dynamic objects, thus this 3410 * checking can be skipped when building a relocatable object. 3411 */ 3412 if (!(flags & FLG_OF_RELOBJ) && 3413 (sgp->sg_flags & FLG_SG_EMPTY)) { 3414 int i; 3415 Addr v_e; 3416 3417 vaddr = phdr->p_vaddr; 3418 phdr->p_memsz = sgp->sg_length; 3419 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3420 ofl->ofl_phdr[phdrndx++] = *phdr; 3421 3422 if (phdr->p_type != PT_LOAD) 3423 continue; 3424 3425 v_e = vaddr + phdr->p_memsz; 3426 3427 /* 3428 * Check overlaps 3429 */ 3430 for (i = 0; i < phdrndx - 1; i++) { 3431 Addr p_s = (ofl->ofl_phdr[i]).p_vaddr; 3432 Addr p_e; 3433 3434 if ((ofl->ofl_phdr[i]).p_type != PT_LOAD) 3435 continue; 3436 3437 p_e = p_s + (ofl->ofl_phdr[i]).p_memsz; 3438 if (((p_s <= vaddr) && (p_e > vaddr)) || 3439 ((vaddr <= p_s) && (v_e > p_s))) 3440 eprintf(ofl->ofl_lml, ERR_WARNING, 3441 MSG_INTL(MSG_UPD_SEGOVERLAP), 3442 ofl->ofl_name, EC_ADDR(p_e), 3443 sgp->sg_name, EC_ADDR(vaddr)); 3444 } 3445 continue; 3446 } 3447 3448 /* 3449 * Having processed any of the special program headers any 3450 * remaining headers will be built to express individual 3451 * segments. Segments are only built if they have output 3452 * section descriptors associated with them (ie. some form of 3453 * input section has been matched to this segment). 3454 */ 3455 if (sgp->sg_osdescs == NULL) 3456 continue; 3457 3458 /* 3459 * Determine the segments offset and size from the section 3460 * information provided from elf_update(). 3461 * Allow for multiple NOBITS sections. 3462 */ 3463 osp = sgp->sg_osdescs->apl_data[0]; 3464 hshdr = osp->os_shdr; 3465 3466 phdr->p_filesz = 0; 3467 phdr->p_memsz = 0; 3468 phdr->p_offset = offset = hshdr->sh_offset; 3469 3470 nobits = ((hshdr->sh_type == SHT_NOBITS) && 3471 ((sgp->sg_flags & FLG_SG_PHREQ) == 0)); 3472 3473 for (APLIST_TRAVERSE(sgp->sg_osdescs, idx, osp)) { 3474 Shdr *shdr = osp->os_shdr; 3475 3476 p_align = 0; 3477 if (shdr->sh_addralign > p_align) 3478 p_align = shdr->sh_addralign; 3479 3480 offset = (Off)S_ROUND(offset, shdr->sh_addralign); 3481 offset += shdr->sh_size; 3482 3483 if (shdr->sh_type != SHT_NOBITS) { 3484 if (nobits) { 3485 eprintf(ofl->ofl_lml, ERR_FATAL, 3486 MSG_INTL(MSG_UPD_NOBITS)); 3487 return (S_ERROR); 3488 } 3489 phdr->p_filesz = offset - phdr->p_offset; 3490 } else if ((sgp->sg_flags & FLG_SG_PHREQ) == 0) 3491 nobits = TRUE; 3492 } 3493 phdr->p_memsz = offset - hshdr->sh_offset; 3494 3495 /* 3496 * If this is PT_SUNWBSS, set alignment 3497 */ 3498 if (phdr->p_type == PT_SUNWBSS) 3499 phdr->p_align = p_align; 3500 3501 /* 3502 * If this is the first loadable segment of a dynamic object, 3503 * or an interpreter has been specified (a static object built 3504 * with an interpreter will still be given a PT_HDR entry), then 3505 * compensate for the elf header and program header array. Both 3506 * of these are actually part of the loadable segment as they 3507 * may be inspected by the interpreter. Adjust the segments 3508 * size and offset accordingly. 3509 */ 3510 if ((_phdr == 0) && (phdr->p_type == PT_LOAD) && 3511 ((ofl->ofl_osinterp) || (flags & FLG_OF_DYNAMIC)) && 3512 (!(ofl->ofl_dtflags_1 & DF_1_NOHDR))) { 3513 size = (Addr)S_ROUND((phdrsz + ehdrsz), 3514 hshdr->sh_addralign); 3515 phdr->p_offset -= size; 3516 phdr->p_filesz += size; 3517 phdr->p_memsz += size; 3518 } 3519 3520 /* 3521 * If a segment size symbol is required (specified via a 3522 * mapfile) update its value. 3523 */ 3524 if (sgp->sg_sizesym != NULL) 3525 sgp->sg_sizesym->sd_sym->st_value = phdr->p_memsz; 3526 3527 /* 3528 * If no file content has been assigned to this segment (it 3529 * only contains no-bits sections), then reset the offset for 3530 * consistency. 3531 */ 3532 if (phdr->p_filesz == 0) 3533 phdr->p_offset = 0; 3534 3535 /* 3536 * If a virtual address has been specified for this segment 3537 * (presumably from a map file) use it and make sure the 3538 * previous segment does not run into this segment. 3539 */ 3540 if ((phdr->p_type == PT_LOAD) || 3541 (phdr->p_type == PT_SUNWBSS)) { 3542 if ((sgp->sg_flags & FLG_SG_VADDR)) { 3543 if (_phdr && (vaddr > phdr->p_vaddr) && 3544 (phdr->p_type == PT_LOAD)) 3545 eprintf(ofl->ofl_lml, ERR_WARNING, 3546 MSG_INTL(MSG_UPD_SEGOVERLAP), 3547 ofl->ofl_name, EC_ADDR(vaddr), 3548 sgp->sg_name, 3549 EC_ADDR(phdr->p_vaddr)); 3550 vaddr = phdr->p_vaddr; 3551 phdr->p_align = 0; 3552 } else { 3553 vaddr = phdr->p_vaddr = 3554 (Addr)S_ROUND(vaddr, phdr->p_align); 3555 } 3556 } 3557 3558 /* 3559 * Adjust the address offset and p_align if needed. 3560 */ 3561 if (((sgp->sg_flags & FLG_SG_VADDR) == 0) && 3562 ((ofl->ofl_dtflags_1 & DF_1_NOHDR) == 0)) { 3563 if (phdr->p_align != 0) 3564 vaddr += phdr->p_offset % phdr->p_align; 3565 else 3566 vaddr += phdr->p_offset; 3567 phdr->p_vaddr = vaddr; 3568 } 3569 3570 /* 3571 * If an interpreter is required set the virtual address of the 3572 * PT_PHDR program header now that we know the virtual address 3573 * of the loadable segment that contains it. Update the 3574 * PT_SUNWCAP header similarly. 3575 */ 3576 if ((_phdr == 0) && (phdr->p_type == PT_LOAD)) { 3577 _phdr = phdr; 3578 3579 if ((ofl->ofl_dtflags_1 & DF_1_NOHDR) == 0) { 3580 if (ofl->ofl_osinterp) 3581 ofl->ofl_phdr[0].p_vaddr = 3582 vaddr + ehdrsz; 3583 3584 /* 3585 * Finally, if we're creating a dynamic object 3586 * (or a static object in which an interpreter 3587 * is specified) update the vaddr to reflect 3588 * the address of the first section within this 3589 * segment. 3590 */ 3591 if ((ofl->ofl_osinterp) || 3592 (flags & FLG_OF_DYNAMIC)) 3593 vaddr += size; 3594 } else { 3595 /* 3596 * If the DF_1_NOHDR flag was set, and an 3597 * interpreter is being generated, the PT_PHDR 3598 * will not be part of any loadable segment. 3599 */ 3600 if (ofl->ofl_osinterp) { 3601 ofl->ofl_phdr[0].p_vaddr = 0; 3602 ofl->ofl_phdr[0].p_memsz = 0; 3603 ofl->ofl_phdr[0].p_flags = 0; 3604 } 3605 } 3606 } 3607 3608 /* 3609 * Ensure the ELF entry point defaults to zero. Typically, this 3610 * value is overridden in update_oehdr() to one of the standard 3611 * entry points. Historically, this default was set to the 3612 * address of first executable section, but this has since been 3613 * found to be more confusing than it is helpful. 3614 */ 3615 ehdr->e_entry = 0; 3616 3617 DBG_CALL(Dbg_seg_entry(ofl, segndx, sgp)); 3618 3619 /* 3620 * Traverse the output section descriptors for this segment so 3621 * that we can update the section headers addresses. We've 3622 * calculated the virtual address of the initial section within 3623 * this segment, so each successive section can be calculated 3624 * based on their offsets from each other. 3625 */ 3626 secndx = 0; 3627 hshdr = 0; 3628 for (APLIST_TRAVERSE(sgp->sg_osdescs, idx, osp)) { 3629 Shdr *shdr = osp->os_shdr; 3630 3631 if (shdr->sh_link) 3632 shdr->sh_link = translate_link(ofl, osp, 3633 shdr->sh_link, MSG_INTL(MSG_FIL_INVSHLINK)); 3634 3635 if (shdr->sh_info && (shdr->sh_flags & SHF_INFO_LINK)) 3636 shdr->sh_info = translate_link(ofl, osp, 3637 shdr->sh_info, MSG_INTL(MSG_FIL_INVSHINFO)); 3638 3639 if (!(flags & FLG_OF_RELOBJ) && 3640 (phdr->p_type == PT_LOAD) || 3641 (phdr->p_type == PT_SUNWBSS)) { 3642 if (hshdr) 3643 vaddr += (shdr->sh_offset - 3644 hshdr->sh_offset); 3645 3646 shdr->sh_addr = vaddr; 3647 hshdr = shdr; 3648 } 3649 3650 DBG_CALL(Dbg_seg_os(ofl, osp, secndx)); 3651 secndx++; 3652 } 3653 3654 /* 3655 * Establish the virtual address of the end of the last section 3656 * in this segment so that the next segments offset can be 3657 * calculated from this. 3658 */ 3659 if (hshdr) 3660 vaddr += hshdr->sh_size; 3661 3662 /* 3663 * Output sections for this segment complete. Adjust the 3664 * virtual offset for the last sections size, and make sure we 3665 * haven't exceeded any maximum segment length specification. 3666 */ 3667 if ((sgp->sg_length != 0) && (sgp->sg_length < phdr->p_memsz)) { 3668 eprintf(ofl->ofl_lml, ERR_FATAL, 3669 MSG_INTL(MSG_UPD_LARGSIZE), ofl->ofl_name, 3670 sgp->sg_name, EC_XWORD(phdr->p_memsz), 3671 EC_XWORD(sgp->sg_length)); 3672 return (S_ERROR); 3673 } 3674 3675 if (phdr->p_type == PT_NOTE) { 3676 phdr->p_vaddr = 0; 3677 phdr->p_paddr = 0; 3678 phdr->p_align = 0; 3679 phdr->p_memsz = 0; 3680 } 3681 3682 if ((phdr->p_type != PT_NULL) && !(flags & FLG_OF_RELOBJ)) 3683 ofl->ofl_phdr[phdrndx++] = *phdr; 3684 } 3685 3686 /* 3687 * Update any new output sections. When building the initial output 3688 * image, a number of sections were created but left uninitialized (eg. 3689 * .dynsym, .dynstr, .symtab, .symtab, etc.). Here we update these 3690 * sections with the appropriate data. Other sections may still be 3691 * modified via reloc_process(). 3692 * 3693 * Copy the interpreter name into the .interp section. 3694 */ 3695 if (ofl->ofl_interp) 3696 (void) strcpy((char *)ofl->ofl_osinterp->os_outdata->d_buf, 3697 ofl->ofl_interp); 3698 3699 /* 3700 * Update the .shstrtab, .strtab and .dynstr sections. 3701 */ 3702 update_ostrtab(ofl->ofl_osshstrtab, ofl->ofl_shdrsttab, 0); 3703 update_ostrtab(ofl->ofl_osstrtab, ofl->ofl_strtab, 0); 3704 update_ostrtab(ofl->ofl_osdynstr, ofl->ofl_dynstrtab, DYNSTR_EXTRA_PAD); 3705 3706 /* 3707 * Build any output symbol tables, the symbols information is copied 3708 * and updated into the new output image. 3709 */ 3710 if ((etext = update_osym(ofl)) == (Addr)S_ERROR) 3711 return (S_ERROR); 3712 3713 /* 3714 * If we have a PT_SUNWDTRACE phdr, update it now with the address of 3715 * the symbol. It's only now been updated via update_sym(). 3716 */ 3717 if (dtracesgp && ofl->ofl_dtracesym) { 3718 Phdr *aphdr, *phdr = &(dtracesgp->sg_phdr); 3719 Sym_desc *sdp = ofl->ofl_dtracesym; 3720 3721 phdr->p_vaddr = sdp->sd_sym->st_value; 3722 phdr->p_memsz = sdp->sd_sym->st_size; 3723 3724 /* 3725 * Take permisions of the segment the symbol is associated with. 3726 */ 3727 aphdr = &sdp->sd_isc->is_osdesc->os_sgdesc->sg_phdr; 3728 assert(aphdr); 3729 phdr->p_flags = aphdr->p_flags; 3730 3731 DBG_CALL(Dbg_seg_entry(ofl, dtracesndx, dtracesgp)); 3732 ofl->ofl_phdr[dtracepndx] = *phdr; 3733 } 3734 3735 /* 3736 * If we have a PT_SUNWCAP phdr, update it now from the associated 3737 * section information. 3738 */ 3739 if (capsgp && ofl->ofl_oscap) { 3740 Phdr *phdr = &(capsgp->sg_phdr); 3741 Shdr *shdr = ofl->ofl_oscap->os_shdr; 3742 3743 phdr->p_vaddr = shdr->sh_addr; 3744 phdr->p_offset = shdr->sh_offset; 3745 phdr->p_filesz = shdr->sh_size; 3746 phdr->p_flags = PF_R; 3747 3748 DBG_CALL(Dbg_seg_entry(ofl, capsndx, capsgp)); 3749 ofl->ofl_phdr[cappndx] = *phdr; 3750 } 3751 3752 /* 3753 * Update the GROUP sections. 3754 */ 3755 if (update_ogroup(ofl) == S_ERROR) 3756 return (S_ERROR); 3757 3758 /* 3759 * Update Move Table. 3760 */ 3761 if (ofl->ofl_osmove || ofl->ofl_issunwdata1) { 3762 if (update_move(ofl) == S_ERROR) 3763 return (S_ERROR); 3764 } 3765 3766 /* 3767 * Build any output headers, version information, dynamic structure and 3768 * syminfo structure. 3769 */ 3770 if (update_oehdr(ofl) == S_ERROR) 3771 return (S_ERROR); 3772 if ((flags & (FLG_OF_VERDEF | FLG_OF_NOVERSEC)) == FLG_OF_VERDEF) 3773 if (update_overdef(ofl) == S_ERROR) 3774 return (S_ERROR); 3775 if ((flags & (FLG_OF_VERNEED | FLG_OF_NOVERSEC)) == FLG_OF_VERNEED) 3776 if (update_overneed(ofl) == S_ERROR) 3777 return (S_ERROR); 3778 if (flags & FLG_OF_DYNAMIC) { 3779 if (update_odynamic(ofl) == S_ERROR) 3780 return (S_ERROR); 3781 if (ofl->ofl_ossyminfo) 3782 if (update_osyminfo(ofl) == S_ERROR) 3783 return (S_ERROR); 3784 } 3785 3786 /* 3787 * Emit Strtab diagnostics. 3788 */ 3789 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osshstrtab, 3790 ofl->ofl_shdrsttab)); 3791 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osstrtab, 3792 ofl->ofl_strtab)); 3793 DBG_CALL(Dbg_sec_strtab(ofl->ofl_lml, ofl->ofl_osdynstr, 3794 ofl->ofl_dynstrtab)); 3795 3796 /* 3797 * Initialize the section headers string table index within the elf 3798 * header. 3799 */ 3800 /* LINTED */ 3801 if ((shscnndx = elf_ndxscn(ofl->ofl_osshstrtab->os_scn)) < 3802 SHN_LORESERVE) { 3803 ofl->ofl_nehdr->e_shstrndx = 3804 /* LINTED */ 3805 (Half)shscnndx; 3806 } else { 3807 /* 3808 * If the STRTAB section index doesn't fit into 3809 * e_shstrndx, then we store it in 'shdr[0].st_link'. 3810 */ 3811 Elf_Scn *scn; 3812 Shdr *shdr0; 3813 3814 if ((scn = elf_getscn(ofl->ofl_elf, 0)) == NULL) { 3815 eprintf(ofl->ofl_lml, ERR_ELF, 3816 MSG_INTL(MSG_ELF_GETSCN), ofl->ofl_name); 3817 return (S_ERROR); 3818 } 3819 if ((shdr0 = elf_getshdr(scn)) == NULL) { 3820 eprintf(ofl->ofl_lml, ERR_ELF, 3821 MSG_INTL(MSG_ELF_GETSHDR), ofl->ofl_name); 3822 return (S_ERROR); 3823 } 3824 ofl->ofl_nehdr->e_shstrndx = SHN_XINDEX; 3825 shdr0->sh_link = shscnndx; 3826 } 3827 3828 return ((uintptr_t)etext); 3829 } 3830