1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1988 AT&T 24 * All Rights Reserved 25 * 26 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 /* 31 * Processing of relocatable objects and shared objects. 32 */ 33 34 #define ELF_TARGET_AMD64 35 #define ELF_TARGET_SPARC 36 37 #include <stdio.h> 38 #include <string.h> 39 #include <fcntl.h> 40 #include <unistd.h> 41 #include <link.h> 42 #include <limits.h> 43 #include <sys/stat.h> 44 #include <sys/systeminfo.h> 45 #include <debug.h> 46 #include <msg.h> 47 #include <_libld.h> 48 49 /* 50 * Decide if we can link against this input file. 51 */ 52 static int 53 ifl_verify(Ehdr *ehdr, Ofl_desc *ofl, Rej_desc *rej) 54 { 55 /* 56 * Check the validity of the elf header information for compatibility 57 * with this machine and our own internal elf library. 58 */ 59 if ((ehdr->e_machine != ld_targ.t_m.m_mach) && 60 ((ehdr->e_machine != ld_targ.t_m.m_machplus) && 61 ((ehdr->e_flags & ld_targ.t_m.m_flagsplus) == 0))) { 62 rej->rej_type = SGS_REJ_MACH; 63 rej->rej_info = (uint_t)ehdr->e_machine; 64 return (0); 65 } 66 if (ehdr->e_ident[EI_DATA] != ld_targ.t_m.m_data) { 67 rej->rej_type = SGS_REJ_DATA; 68 rej->rej_info = (uint_t)ehdr->e_ident[EI_DATA]; 69 return (0); 70 } 71 if (ehdr->e_version > ofl->ofl_dehdr->e_version) { 72 rej->rej_type = SGS_REJ_VERSION; 73 rej->rej_info = (uint_t)ehdr->e_version; 74 return (0); 75 } 76 return (1); 77 } 78 79 /* 80 * Check sanity of file header and allocate an infile descriptor 81 * for the file being processed. 82 */ 83 static Ifl_desc * 84 ifl_setup(const char *name, Ehdr *ehdr, Elf *elf, Word flags, Ofl_desc *ofl, 85 Rej_desc *rej) 86 { 87 Ifl_desc *ifl; 88 Rej_desc _rej = { 0 }; 89 90 if (ifl_verify(ehdr, ofl, &_rej) == 0) { 91 _rej.rej_name = name; 92 DBG_CALL(Dbg_file_rejected(ofl->ofl_lml, &_rej, 93 ld_targ.t_m.m_mach)); 94 if (rej->rej_type == 0) { 95 *rej = _rej; 96 rej->rej_name = strdup(_rej.rej_name); 97 } 98 return (0); 99 } 100 101 if ((ifl = libld_calloc(1, sizeof (Ifl_desc))) == 0) 102 return ((Ifl_desc *)S_ERROR); 103 ifl->ifl_name = name; 104 ifl->ifl_ehdr = ehdr; 105 ifl->ifl_elf = elf; 106 ifl->ifl_flags = flags; 107 108 /* 109 * Is this file using 'extended Section Indexes'. If so, use the 110 * e_shnum & e_shstrndx which can be found at: 111 * 112 * e_shnum == Shdr[0].sh_size 113 * e_shstrndx == Shdr[0].sh_link 114 */ 115 if ((ehdr->e_shnum == 0) && (ehdr->e_shoff != 0)) { 116 Elf_Scn *scn; 117 Shdr *shdr0; 118 119 if ((scn = elf_getscn(elf, 0)) == NULL) { 120 eprintf(ofl->ofl_lml, ERR_ELF, 121 MSG_INTL(MSG_ELF_GETSCN), name); 122 ofl->ofl_flags |= FLG_OF_FATAL; 123 return ((Ifl_desc *)S_ERROR); 124 } 125 if ((shdr0 = elf_getshdr(scn)) == NULL) { 126 eprintf(ofl->ofl_lml, ERR_ELF, 127 MSG_INTL(MSG_ELF_GETSHDR), name); 128 ofl->ofl_flags |= FLG_OF_FATAL; 129 return ((Ifl_desc *)S_ERROR); 130 } 131 ifl->ifl_shnum = (Word)shdr0->sh_size; 132 if (ehdr->e_shstrndx == SHN_XINDEX) 133 ifl->ifl_shstrndx = shdr0->sh_link; 134 else 135 ifl->ifl_shstrndx = ehdr->e_shstrndx; 136 } else { 137 ifl->ifl_shnum = ehdr->e_shnum; 138 ifl->ifl_shstrndx = ehdr->e_shstrndx; 139 } 140 141 if ((ifl->ifl_isdesc = libld_calloc(ifl->ifl_shnum, 142 sizeof (Is_desc *))) == 0) 143 return ((Ifl_desc *)S_ERROR); 144 145 /* 146 * Record this new input file on the shared object or relocatable 147 * object input file list. 148 */ 149 if (ifl->ifl_ehdr->e_type == ET_DYN) { 150 if (aplist_append(&ofl->ofl_sos, ifl, AL_CNT_OFL_LIBS) == NULL) 151 return ((Ifl_desc *)S_ERROR); 152 } else { 153 if (aplist_append(&ofl->ofl_objs, ifl, AL_CNT_OFL_OBJS) == NULL) 154 return ((Ifl_desc *)S_ERROR); 155 } 156 157 return (ifl); 158 } 159 160 /* 161 * Process a generic section. The appropriate section information is added 162 * to the files input descriptor list. 163 */ 164 static uintptr_t 165 process_section(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 166 Word ndx, int ident, Ofl_desc *ofl) 167 { 168 Is_desc *isp; 169 170 /* 171 * Create a new input section descriptor. If this is a NOBITS 172 * section elf_getdata() will still create a data buffer (the buffer 173 * will be null and the size will reflect the actual memory size). 174 */ 175 if ((isp = libld_calloc(sizeof (Is_desc), 1)) == 0) 176 return (S_ERROR); 177 isp->is_shdr = shdr; 178 isp->is_file = ifl; 179 isp->is_name = name; 180 isp->is_scnndx = ndx; 181 isp->is_flags = FLG_IS_EXTERNAL; 182 isp->is_keyident = ident; 183 184 if ((isp->is_indata = elf_getdata(scn, NULL)) == NULL) { 185 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_GETDATA), 186 ifl->ifl_name); 187 ofl->ofl_flags |= FLG_OF_FATAL; 188 return (0); 189 } 190 191 if ((shdr->sh_flags & SHF_EXCLUDE) && 192 ((ofl->ofl_flags & FLG_OF_RELOBJ) == 0)) { 193 isp->is_flags |= FLG_IS_DISCARD; 194 } 195 196 /* 197 * Add the new input section to the files input section list and 198 * flag whether the section needs placing in an output section. This 199 * placement is deferred until all input section processing has been 200 * completed, as SHT_GROUP sections can provide information that will 201 * affect how other sections within the file should be placed. 202 */ 203 ifl->ifl_isdesc[ndx] = isp; 204 205 if (ident) { 206 if (shdr->sh_flags & ALL_SHF_ORDER) { 207 isp->is_flags |= FLG_IS_ORDERED; 208 ifl->ifl_flags |= FLG_IF_ORDERED; 209 } 210 isp->is_flags |= FLG_IS_PLACE; 211 } 212 return (1); 213 } 214 215 /* 216 * Determine the software capabilities of the object being built from the 217 * capabilities of the input relocatable objects. One software capability 218 * is presently recognized, and represented with the following (sys/elf.h): 219 * 220 * SF1_SUNW_FPKNWN use/non-use of frame pointer is known, and 221 * SF1_SUNW_FPUSED the frame pointer is in use. 222 * 223 * The resolution of the present fame pointer state, and the capabilities 224 * provided by a new input relocatable object are: 225 * 226 * new input relocatable object 227 * 228 * present | SF1_SUNW_FPKNWN | SF1_SUNW_FPKNWN | <unknown> 229 * state | SF1_SUNW_FPUSED | | 230 * --------------------------------------------------------------------------- 231 * SF1_SUNW_FPKNWN | SF1_SUNW_FPKNWN | SF1_SUNW_FPKNWN | SF1_SUNW_FPKNWN 232 * SF1_SUNW_FPUSED | SF1_SUNW_FPUSED | | SF1_SUNW_FPUSED 233 * --------------------------------------------------------------------------- 234 * SF1_SUNW_FPKNWN | SF1_SUNW_FPKNWN | SF1_SUNW_FPKNWN | SF1_SUNW_FPKNWN 235 * | | | 236 * --------------------------------------------------------------------------- 237 * <unknown> | SF1_SUNW_FPKNWN | SF1_SUNW_FPKNWN | <unknown> 238 * | SF1_SUNW_FPUSED | | 239 */ 240 static void 241 sf1_cap(Ofl_desc *ofl, Xword val, Ifl_desc *ifl, const char *name) 242 { 243 Xword badval; 244 245 /* 246 * If a mapfile has established definitions to override any input 247 * capabilities, ignore any new input capabilities. 248 */ 249 if (ofl->ofl_flags1 & FLG_OF1_OVSFCAP) { 250 Dbg_cap_sec_entry(ofl->ofl_lml, DBG_CAP_IGNORE, CA_SUNW_SF_1, 251 val, ld_targ.t_m.m_mach); 252 return; 253 } 254 255 #if !defined(_ELF64) 256 if (ifl->ifl_ehdr->e_type == ET_REL) { 257 /* 258 * The SF1_SUNW_ADDR32 is only meaningful when building a 64-bit 259 * object. Warn the user, and remove the setting, if we're 260 * building a 32-bit object. 261 */ 262 if (val & SF1_SUNW_ADDR32) { 263 eprintf(ofl->ofl_lml, ERR_WARNING, 264 MSG_INTL(MSG_FIL_INADDR32SF1), ifl->ifl_name, name); 265 val &= ~SF1_SUNW_ADDR32; 266 } 267 } 268 #endif 269 /* 270 * If this object doesn't specify any capabilities, ignore it, and 271 * leave the state as is. 272 */ 273 if (val == 0) 274 return; 275 276 /* 277 * Make sure we only accept known software capabilities. Note, that 278 * an F1_SUNW_FPUSED by itself is viewed as bad practice. 279 */ 280 if ((badval = (val & ~SF1_SUNW_MASK)) != 0) { 281 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_FIL_BADSF1), 282 ifl->ifl_name, name, EC_XWORD(badval)); 283 val &= SF1_SUNW_MASK; 284 } 285 if ((val & (SF1_SUNW_FPKNWN | SF1_SUNW_FPUSED)) == SF1_SUNW_FPUSED) { 286 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_FIL_BADSF1), 287 ifl->ifl_name, name, EC_XWORD(val)); 288 return; 289 } 290 291 /* 292 * If the input file is not a relocatable object, then we're only here 293 * to warn the user of any questionable capabilities. 294 */ 295 if (ifl->ifl_ehdr->e_type != ET_REL) { 296 #if defined(_ELF64) 297 /* 298 * If we're building a 64-bit executable, and we come across a 299 * dependency that requires a restricted address space, then 300 * that dependencies requirement can only be satisfied if the 301 * executable triggers the restricted address space. This is a 302 * warning rather than a fatal error, as the possibility exists 303 * that an appropriate dependency will be provided at runtime. 304 * The runtime linker will refuse to use this dependency. 305 */ 306 if ((val & SF1_SUNW_ADDR32) && (ofl->ofl_flags & FLG_OF_EXEC) && 307 ((ofl->ofl_sfcap_1 & SF1_SUNW_ADDR32) == 0)) { 308 eprintf(ofl->ofl_lml, ERR_WARNING, 309 MSG_INTL(MSG_FIL_EXADDR32SF1), ifl->ifl_name, name); 310 } 311 #endif 312 return; 313 } 314 315 Dbg_cap_sec_entry(ofl->ofl_lml, DBG_CAP_OLD, CA_SUNW_SF_1, 316 ofl->ofl_sfcap_1, ld_targ.t_m.m_mach); 317 Dbg_cap_sec_entry(ofl->ofl_lml, DBG_CAP_NEW, CA_SUNW_SF_1, 318 val, ld_targ.t_m.m_mach); 319 320 /* 321 * Determine the resolution of the present frame pointer and the 322 * new input relocatable objects frame pointer. 323 */ 324 if ((ofl->ofl_sfcap_1 & (SF1_SUNW_FPKNWN | SF1_SUNW_FPUSED)) == 325 (SF1_SUNW_FPKNWN | SF1_SUNW_FPUSED)) { 326 /* 327 * If the new relocatable object isn't using a frame pointer, 328 * reduce the present state to unused. 329 */ 330 if ((val & (SF1_SUNW_FPKNWN | SF1_SUNW_FPUSED)) != 331 (SF1_SUNW_FPKNWN | SF1_SUNW_FPUSED)) 332 ofl->ofl_sfcap_1 &= ~SF1_SUNW_FPUSED; 333 334 } else if ((ofl->ofl_sfcap_1 & SF1_SUNW_FPKNWN) == 0) { 335 /* 336 * If the present state is unknown, take the new relocatable 337 * object frame pointer usage. 338 */ 339 ofl->ofl_sfcap_1 = val; 340 } 341 342 Dbg_cap_sec_entry(ofl->ofl_lml, DBG_CAP_RESOLVED, CA_SUNW_SF_1, 343 ofl->ofl_sfcap_1, ld_targ.t_m.m_mach); 344 } 345 346 /* 347 * Determine the hardware capabilities of the object being built from the 348 * capabilities of the input relocatable objects. There's really little to 349 * do here, other than to offer diagnostics, hardware capabilities are simply 350 * additive. 351 */ 352 static void 353 hw1_cap(Ofl_desc *ofl, Xword val) 354 { 355 /* 356 * If a mapfile has established definitions to override any input 357 * capabilities, ignore any new input capabilities. 358 */ 359 if (ofl->ofl_flags1 & FLG_OF1_OVHWCAP) { 360 Dbg_cap_sec_entry(ofl->ofl_lml, DBG_CAP_IGNORE, CA_SUNW_HW_1, 361 val, ld_targ.t_m.m_mach); 362 return; 363 } 364 365 /* 366 * If this object doesn't specify any capabilities, ignore it, and 367 * leave the state as is. 368 */ 369 if (val == 0) 370 return; 371 372 Dbg_cap_sec_entry(ofl->ofl_lml, DBG_CAP_OLD, CA_SUNW_HW_1, 373 ofl->ofl_hwcap_1, ld_targ.t_m.m_mach); 374 Dbg_cap_sec_entry(ofl->ofl_lml, DBG_CAP_NEW, CA_SUNW_HW_1, val, 375 ld_targ.t_m.m_mach); 376 377 ofl->ofl_hwcap_1 |= val; 378 379 Dbg_cap_sec_entry(ofl->ofl_lml, DBG_CAP_RESOLVED, CA_SUNW_HW_1, 380 ofl->ofl_hwcap_1, ld_targ.t_m.m_mach); 381 } 382 383 /* 384 * Process a hardware/software capabilities section. Traverse the section 385 * updating the global capabilities variables as necessary. 386 */ 387 static void 388 process_cap(Ifl_desc *ifl, Is_desc *cisp, Ofl_desc *ofl) 389 { 390 Cap *cdata; 391 Word ndx, cnum; 392 393 DBG_CALL(Dbg_cap_sec_title(ofl->ofl_lml, ifl->ifl_name)); 394 395 /* 396 * The capabilities are supposed to be terminated with a CA_SUNW_NULL 397 * entry. However, the compilers have been known to not follow this 398 * convention. Use the section information to determine the number 399 * of capabilities, and skip any CA_SUNW_NULL entries. 400 */ 401 cdata = (Cap *)cisp->is_indata->d_buf; 402 cnum = (Word)(cisp->is_shdr->sh_size / cisp->is_shdr->sh_entsize); 403 404 for (ndx = 0; ndx < cnum; cdata++, ndx++) { 405 switch (cdata->c_tag) { 406 case CA_SUNW_HW_1: 407 /* 408 * Only the hardware capabilities that are 409 * defined in a relocatable object become part 410 * of the hardware capabilities in the output 411 * file. 412 */ 413 if (ifl->ifl_ehdr->e_type == ET_REL) 414 hw1_cap(ofl, cdata->c_un.c_val); 415 break; 416 case CA_SUNW_SF_1: 417 /* 418 * Only the software capabilities that are 419 * defined in a relocatable object become part 420 * of the software capabilities in the output 421 * file. However, check the validity of the 422 * software capabilities of any dependencies. 423 */ 424 sf1_cap(ofl, cdata->c_un.c_val, ifl, 425 cisp->is_name); 426 break; 427 case CA_SUNW_NULL: 428 break; 429 default: 430 eprintf(ofl->ofl_lml, ERR_WARNING, 431 MSG_INTL(MSG_FIL_UNKCAP), 432 ifl->ifl_name, cisp->is_name, cdata->c_tag); 433 } 434 } 435 } 436 437 /* 438 * Simply process the section so that we have pointers to the data for use 439 * in later routines, however don't add the section to the output section 440 * list as we will be creating our own replacement sections later (ie. 441 * symtab and relocation). 442 */ 443 static uintptr_t 444 /* ARGSUSED5 */ 445 process_input(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 446 Word ndx, int ident, Ofl_desc *ofl) 447 { 448 return (process_section(name, ifl, shdr, scn, ndx, 449 ld_targ.t_id.id_null, ofl)); 450 } 451 452 /* 453 * Keep a running count of relocation entries from input relocatable objects for 454 * sizing relocation buckets later. If we're building an executable, save any 455 * relocations from shared objects to determine if any copy relocation symbol 456 * has a displacement relocation against it. 457 */ 458 static uintptr_t 459 /* ARGSUSED5 */ 460 process_reloc(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 461 Word ndx, int ident, Ofl_desc *ofl) 462 { 463 if (process_section(name, ifl, 464 shdr, scn, ndx, ld_targ.t_id.id_null, ofl) == S_ERROR) 465 return (S_ERROR); 466 467 if (ifl->ifl_ehdr->e_type == ET_REL) { 468 if (shdr->sh_entsize && (shdr->sh_entsize <= shdr->sh_size)) 469 /* LINTED */ 470 ofl->ofl_relocincnt += 471 (Word)(shdr->sh_size / shdr->sh_entsize); 472 } else if (ofl->ofl_flags & FLG_OF_EXEC) { 473 if (aplist_append(&ifl->ifl_relsect, ifl->ifl_isdesc[ndx], 474 AL_CNT_IFL_RELSECS) == NULL) 475 return (S_ERROR); 476 } 477 return (1); 478 } 479 480 481 /* 482 * Process a string table section. A valid section contains an initial and 483 * final null byte. 484 */ 485 static uintptr_t 486 process_strtab(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 487 Word ndx, int ident, Ofl_desc *ofl) 488 { 489 char *data; 490 size_t size; 491 Is_desc *isp; 492 uintptr_t error; 493 494 /* 495 * Never include .stab.excl sections in any output file. 496 * If the -s flag has been specified strip any .stab sections. 497 */ 498 if (((ofl->ofl_flags & FLG_OF_STRIP) && ident && 499 (strncmp(name, MSG_ORIG(MSG_SCN_STAB), MSG_SCN_STAB_SIZE) == 0)) || 500 (strcmp(name, MSG_ORIG(MSG_SCN_STABEXCL)) == 0) && ident) 501 return (1); 502 503 /* 504 * If we got here to process a .shstrtab or .dynstr table, `ident' will 505 * be null. Otherwise make sure we don't have a .strtab section as this 506 * should not be added to the output section list either. 507 */ 508 if ((ident != ld_targ.t_id.id_null) && 509 (strcmp(name, MSG_ORIG(MSG_SCN_STRTAB)) == 0)) 510 ident = ld_targ.t_id.id_null; 511 512 error = process_section(name, ifl, shdr, scn, ndx, ident, ofl); 513 if ((error == 0) || (error == S_ERROR)) 514 return (error); 515 516 /* 517 * String tables should start and end with a NULL byte. Note, it has 518 * been known for the assembler to create empty string tables, so check 519 * the size before attempting to verify the data itself. 520 */ 521 isp = ifl->ifl_isdesc[ndx]; 522 size = isp->is_indata->d_size; 523 if (size) { 524 data = isp->is_indata->d_buf; 525 if (data[0] != '\0' || data[size - 1] != '\0') 526 eprintf(ofl->ofl_lml, ERR_WARNING, 527 MSG_INTL(MSG_FIL_MALSTR), ifl->ifl_name, name); 528 } else 529 isp->is_indata->d_buf = (void *)MSG_ORIG(MSG_STR_EMPTY); 530 531 ifl->ifl_flags |= FLG_IF_HSTRTAB; 532 return (1); 533 } 534 535 /* 536 * Invalid sections produce a warning and are skipped. 537 */ 538 static uintptr_t 539 /* ARGSUSED3 */ 540 invalid_section(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 541 Word ndx, int ident, Ofl_desc *ofl) 542 { 543 Conv_inv_buf_t inv_buf; 544 545 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_FIL_INVALSEC), 546 ifl->ifl_name, name, conv_sec_type(ifl->ifl_ehdr->e_machine, 547 shdr->sh_type, 0, &inv_buf)); 548 return (1); 549 } 550 551 /* 552 * Process a progbits section. 553 */ 554 static uintptr_t 555 process_progbits(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 556 Word ndx, int ident, Ofl_desc *ofl) 557 { 558 int stab_index = 0; 559 Word is_flags = 0; 560 uintptr_t r; 561 562 /* 563 * Never include .stab.excl sections in any output file. 564 * If the -s flag has been specified strip any .stab sections. 565 */ 566 if (ident && (strncmp(name, MSG_ORIG(MSG_SCN_STAB), 567 MSG_SCN_STAB_SIZE) == 0)) { 568 if ((ofl->ofl_flags & FLG_OF_STRIP) || 569 (strcmp((name + MSG_SCN_STAB_SIZE), 570 MSG_ORIG(MSG_SCN_EXCL)) == 0)) 571 return (1); 572 573 if (strcmp((name + MSG_SCN_STAB_SIZE), 574 MSG_ORIG(MSG_SCN_INDEX)) == 0) 575 stab_index = 1; 576 } 577 578 if ((ofl->ofl_flags & FLG_OF_STRIP) && ident) { 579 if ((strncmp(name, MSG_ORIG(MSG_SCN_DEBUG), 580 MSG_SCN_DEBUG_SIZE) == 0) || 581 (strcmp(name, MSG_ORIG(MSG_SCN_LINE)) == 0)) 582 return (1); 583 } 584 585 /* 586 * Update the ident to reflect the type of section we've got. 587 * 588 * If there is any .plt or .got section to generate we'll be creating 589 * our own version, so don't allow any input sections of these types to 590 * be added to the output section list (why a relocatable object would 591 * have a .plt or .got is a mystery, but stranger things have occurred). 592 * 593 * If there are any unwind sections, and this is a platform that uses 594 * SHT_PROGBITS for unwind sections, then set their ident to reflect 595 * that. 596 */ 597 if (ident) { 598 if (shdr->sh_flags & SHF_TLS) { 599 ident = ld_targ.t_id.id_tls; 600 } else if ((shdr->sh_flags & ~ALL_SHF_IGNORE) == 601 (SHF_ALLOC | SHF_EXECINSTR)) { 602 ident = ld_targ.t_id.id_text; 603 } else if (shdr->sh_flags & SHF_ALLOC) { 604 int done = 0; 605 606 if (name[0] == '.') { 607 switch (name[1]) { 608 case 'e': 609 if ((ld_targ.t_m.m_sht_unwind == 610 SHT_PROGBITS) && 611 (strcmp(name, 612 MSG_ORIG(MSG_SCN_EHFRAME)) == 0)) { 613 ident = ld_targ.t_id.id_unwind; 614 is_flags = FLG_IS_EHFRAME; 615 done = 1; 616 } 617 break; 618 case 'g': 619 if (strcmp(name, 620 MSG_ORIG(MSG_SCN_GOT)) == 0) { 621 ident = ld_targ.t_id.id_null; 622 done = 1; 623 break; 624 } 625 if ((ld_targ.t_m.m_sht_unwind == 626 SHT_PROGBITS)&& 627 (strcmp(name, 628 MSG_ORIG(MSG_SCN_GCC_X_TBL)) == 629 0)) { 630 ident = ld_targ.t_id.id_unwind; 631 done = 1; 632 break; 633 } 634 break; 635 case 'p': 636 if (strcmp(name, 637 MSG_ORIG(MSG_SCN_PLT)) == 0) { 638 ident = ld_targ.t_id.id_null; 639 done = 1; 640 } 641 break; 642 } 643 } 644 if (!done) { 645 if (stab_index) { 646 /* 647 * This is a work-around for x86 648 * compilers that have set SHF_ALLOC 649 * for the .stab.index section. 650 * 651 * Because of this, make sure that the 652 * .stab.index does not end up as the 653 * last section in the text segment. 654 * Older linkers can produce 655 * segmentation violations when they 656 * strip (ld -s) against a shared 657 * object whose last section in the 658 * text segment is a .stab. 659 */ 660 ident = ld_targ.t_id.id_interp; 661 } else { 662 ident = ld_targ.t_id.id_data; 663 } 664 } 665 } else 666 ident = ld_targ.t_id.id_note; 667 } 668 669 r = process_section(name, ifl, shdr, scn, ndx, ident, ofl); 670 671 /* 672 * On success, process_section() creates an input section descriptor. 673 * Now that it exists, we can add any pending input section flags. 674 */ 675 if ((is_flags != 0) && (r == 1)) 676 ifl->ifl_isdesc[ndx]->is_flags |= is_flags; 677 678 return (r); 679 } 680 681 /* 682 * Handles the SHT_SUNW_{DEBUG,DEBUGSTR) sections. 683 */ 684 static uintptr_t 685 process_debug(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 686 Word ndx, int ident, Ofl_desc *ofl) 687 { 688 /* 689 * Debug information is discarded when the 'ld -s' flag is invoked. 690 */ 691 if (ofl->ofl_flags & FLG_OF_STRIP) { 692 return (1); 693 } 694 return (process_progbits(name, ifl, shdr, scn, ndx, ident, ofl)); 695 } 696 697 /* 698 * Process a nobits section. 699 */ 700 static uintptr_t 701 process_nobits(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 702 Word ndx, int ident, Ofl_desc *ofl) 703 { 704 if (ident) { 705 if (shdr->sh_flags & SHF_TLS) 706 ident = ld_targ.t_id.id_tlsbss; 707 #if defined(_ELF64) 708 else if ((shdr->sh_flags & SHF_AMD64_LARGE) && 709 (ld_targ.t_m.m_mach == EM_AMD64)) 710 ident = ld_targ.t_id.id_lbss; 711 #endif 712 else 713 ident = ld_targ.t_id.id_bss; 714 } 715 return (process_section(name, ifl, shdr, scn, ndx, ident, ofl)); 716 } 717 718 /* 719 * Process a SHT_*_ARRAY section. 720 */ 721 static uintptr_t 722 process_array(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 723 Word ndx, int ident, Ofl_desc *ofl) 724 { 725 uintptr_t error; 726 727 if (ident) 728 ident = ld_targ.t_id.id_array; 729 730 error = process_section(name, ifl, shdr, scn, ndx, ident, ofl); 731 if ((error == 0) || (error == S_ERROR)) 732 return (error); 733 734 return (1); 735 } 736 737 static uintptr_t 738 /* ARGSUSED1 */ 739 array_process(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 740 { 741 Os_desc *osp; 742 Shdr *shdr; 743 744 if ((isc == NULL) || ((osp = isc->is_osdesc) == NULL)) 745 return (0); 746 747 shdr = isc->is_shdr; 748 749 if ((shdr->sh_type == SHT_FINI_ARRAY) && 750 (ofl->ofl_osfiniarray == NULL)) 751 ofl->ofl_osfiniarray = osp; 752 else if ((shdr->sh_type == SHT_INIT_ARRAY) && 753 (ofl->ofl_osinitarray == NULL)) 754 ofl->ofl_osinitarray = osp; 755 else if ((shdr->sh_type == SHT_PREINIT_ARRAY) && 756 (ofl->ofl_ospreinitarray == NULL)) 757 ofl->ofl_ospreinitarray = osp; 758 759 return (1); 760 } 761 762 /* 763 * Process a SHT_SYMTAB_SHNDX section. 764 */ 765 static uintptr_t 766 process_sym_shndx(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 767 Word ndx, int ident, Ofl_desc *ofl) 768 { 769 if (process_input(name, ifl, shdr, scn, ndx, ident, ofl) == S_ERROR) 770 return (S_ERROR); 771 772 /* 773 * Have we already seen the related SYMTAB - if so verify it now. 774 */ 775 if (shdr->sh_link < ndx) { 776 Is_desc *isp = ifl->ifl_isdesc[shdr->sh_link]; 777 778 if ((isp == 0) || ((isp->is_shdr->sh_type != SHT_SYMTAB) && 779 (isp->is_shdr->sh_type != SHT_DYNSYM))) { 780 eprintf(ofl->ofl_lml, ERR_FATAL, 781 MSG_INTL(MSG_FIL_INVSHLINK), ifl->ifl_name, name, 782 EC_XWORD(shdr->sh_link)); 783 return (S_ERROR); 784 } 785 isp->is_symshndx = ifl->ifl_isdesc[ndx]; 786 } 787 return (1); 788 } 789 790 /* 791 * Final processing for SHT_SYMTAB_SHNDX section. 792 */ 793 static uintptr_t 794 /* ARGSUSED2 */ 795 sym_shndx_process(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 796 { 797 if (isc->is_shdr->sh_link > isc->is_scnndx) { 798 Is_desc *isp = ifl->ifl_isdesc[isc->is_shdr->sh_link]; 799 800 if ((isp == 0) || ((isp->is_shdr->sh_type != SHT_SYMTAB) && 801 (isp->is_shdr->sh_type != SHT_DYNSYM))) { 802 eprintf(ofl->ofl_lml, ERR_FATAL, 803 MSG_INTL(MSG_FIL_INVSHLINK), isc->is_file->ifl_name, 804 isc->is_name, EC_XWORD(isc->is_shdr->sh_link)); 805 return (S_ERROR); 806 } 807 isp->is_symshndx = isc; 808 } 809 return (1); 810 } 811 812 /* 813 * Process .dynamic section from a relocatable object. 814 * 815 * Note: That the .dynamic section is only considered interesting when 816 * dlopen()ing a relocatable object (thus FLG_OF1_RELDYN can only get 817 * set when libld is called from ld.so.1). 818 */ 819 /*ARGSUSED*/ 820 static uintptr_t 821 process_rel_dynamic(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 822 Word ndx, int ident, Ofl_desc *ofl) 823 { 824 Dyn *dyn; 825 Elf_Scn *strscn; 826 Elf_Data *dp; 827 char *str; 828 829 /* 830 * Process .dynamic sections from relocatable objects ? 831 */ 832 if ((ofl->ofl_flags1 & FLG_OF1_RELDYN) == 0) 833 return (1); 834 835 /* 836 * Find the string section associated with the .dynamic section. 837 */ 838 if ((strscn = elf_getscn(ifl->ifl_elf, shdr->sh_link)) == NULL) { 839 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_GETSCN), 840 ifl->ifl_name); 841 ofl->ofl_flags |= FLG_OF_FATAL; 842 return (0); 843 } 844 dp = elf_getdata(strscn, NULL); 845 str = (char *)dp->d_buf; 846 847 /* 848 * And get the .dynamic data 849 */ 850 dp = elf_getdata(scn, NULL); 851 852 for (dyn = (Dyn *)dp->d_buf; dyn->d_tag != DT_NULL; dyn++) { 853 Ifl_desc *difl; 854 855 switch (dyn->d_tag) { 856 case DT_NEEDED: 857 case DT_USED: 858 if (((difl = libld_calloc(1, 859 sizeof (Ifl_desc))) == NULL) || 860 (aplist_append(&ofl->ofl_sos, difl, 861 AL_CNT_OFL_LIBS) == NULL)) 862 return (S_ERROR); 863 864 difl->ifl_name = MSG_ORIG(MSG_STR_DYNAMIC); 865 difl->ifl_soname = str + (size_t)dyn->d_un.d_val; 866 difl->ifl_flags = FLG_IF_NEEDSTR; 867 break; 868 case DT_RPATH: 869 case DT_RUNPATH: 870 if ((ofl->ofl_rpath = add_string(ofl->ofl_rpath, 871 (str + (size_t)dyn->d_un.d_val))) == 872 (const char *)S_ERROR) 873 return (S_ERROR); 874 break; 875 case DT_VERSYM: 876 /* 877 * The Solaris ld does not put DT_VERSYM in the 878 * dynamic section. If the object has DT_VERSYM, 879 * then it must have been produced by the GNU ld, 880 * and is using the GNU style of versioning. 881 */ 882 ifl->ifl_flags |= FLG_IF_GNUVER; 883 break; 884 } 885 } 886 return (1); 887 } 888 889 /* 890 * Expand implicit references. Dependencies can be specified in terms of the 891 * $ORIGIN, $PLATFORM, $OSREL and $OSNAME tokens, either from their needed name, 892 * or via a runpath. In addition runpaths may also specify the $ISALIST token. 893 * 894 * Probably the most common reference to explicit dependencies (via -L) will be 895 * sufficient to find any associated implicit dependencies, but just in case we 896 * expand any occurrence of these known tokens here. 897 * 898 * Note, if any errors occur we simply return the original name. 899 * 900 * This code is remarkably similar to expand() in rtld/common/paths.c. 901 */ 902 static char *platform = 0; 903 static size_t platform_sz = 0; 904 static Isa_desc *isa = 0; 905 static Uts_desc *uts = 0; 906 907 static char * 908 expand(const char *parent, const char *name, char **next) 909 { 910 char _name[PATH_MAX], *nptr, *_next; 911 const char *optr; 912 size_t nrem = PATH_MAX - 1; 913 int expanded = 0, _expanded, isaflag = 0; 914 915 optr = name; 916 nptr = _name; 917 918 while (*optr) { 919 if (nrem == 0) 920 return ((char *)name); 921 922 if (*optr != '$') { 923 *nptr++ = *optr++, nrem--; 924 continue; 925 } 926 927 _expanded = 0; 928 929 if (strncmp(optr, MSG_ORIG(MSG_STR_ORIGIN), 930 MSG_STR_ORIGIN_SIZE) == 0) { 931 char *eptr; 932 933 /* 934 * For $ORIGIN, expansion is really just a concatenation 935 * of the parents directory name. For example, an 936 * explicit dependency foo/bar/lib1.so with a dependency 937 * on $ORIGIN/lib2.so would be expanded to 938 * foo/bar/lib2.so. 939 */ 940 if ((eptr = strrchr(parent, '/')) == 0) { 941 *nptr++ = '.'; 942 nrem--; 943 } else { 944 size_t len = eptr - parent; 945 946 if (len >= nrem) 947 return ((char *)name); 948 949 (void) strncpy(nptr, parent, len); 950 nptr = nptr + len; 951 nrem -= len; 952 } 953 optr += MSG_STR_ORIGIN_SIZE; 954 expanded = _expanded = 1; 955 956 } else if (strncmp(optr, MSG_ORIG(MSG_STR_PLATFORM), 957 MSG_STR_PLATFORM_SIZE) == 0) { 958 /* 959 * Establish the platform from sysconf - like uname -i. 960 */ 961 if ((platform == 0) && (platform_sz == 0)) { 962 char info[SYS_NMLN]; 963 long size; 964 965 size = sysinfo(SI_PLATFORM, info, SYS_NMLN); 966 if ((size != -1) && 967 (platform = libld_malloc((size_t)size))) { 968 (void) strcpy(platform, info); 969 platform_sz = (size_t)size - 1; 970 } else 971 platform_sz = 1; 972 } 973 if (platform != 0) { 974 if (platform_sz >= nrem) 975 return ((char *)name); 976 977 (void) strncpy(nptr, platform, platform_sz); 978 nptr = nptr + platform_sz; 979 nrem -= platform_sz; 980 981 optr += MSG_STR_PLATFORM_SIZE; 982 expanded = _expanded = 1; 983 } 984 985 } else if (strncmp(optr, MSG_ORIG(MSG_STR_OSNAME), 986 MSG_STR_OSNAME_SIZE) == 0) { 987 /* 988 * Establish the os name - like uname -s. 989 */ 990 if (uts == 0) 991 uts = conv_uts(); 992 993 if (uts && uts->uts_osnamesz) { 994 if (uts->uts_osnamesz >= nrem) 995 return ((char *)name); 996 997 (void) strncpy(nptr, uts->uts_osname, 998 uts->uts_osnamesz); 999 nptr = nptr + uts->uts_osnamesz; 1000 nrem -= uts->uts_osnamesz; 1001 1002 optr += MSG_STR_OSNAME_SIZE; 1003 expanded = _expanded = 1; 1004 } 1005 1006 } else if (strncmp(optr, MSG_ORIG(MSG_STR_OSREL), 1007 MSG_STR_OSREL_SIZE) == 0) { 1008 /* 1009 * Establish the os release - like uname -r. 1010 */ 1011 if (uts == 0) 1012 uts = conv_uts(); 1013 1014 if (uts && uts->uts_osrelsz) { 1015 if (uts->uts_osrelsz >= nrem) 1016 return ((char *)name); 1017 1018 (void) strncpy(nptr, uts->uts_osrel, 1019 uts->uts_osrelsz); 1020 nptr = nptr + uts->uts_osrelsz; 1021 nrem -= uts->uts_osrelsz; 1022 1023 optr += MSG_STR_OSREL_SIZE; 1024 expanded = _expanded = 1; 1025 } 1026 1027 } else if ((strncmp(optr, MSG_ORIG(MSG_STR_ISALIST), 1028 MSG_STR_ISALIST_SIZE) == 0) && next && (isaflag++ == 0)) { 1029 /* 1030 * Establish instruction sets from sysconf. Note that 1031 * this is only meaningful from runpaths. 1032 */ 1033 if (isa == 0) 1034 isa = conv_isalist(); 1035 1036 if (isa && isa->isa_listsz && 1037 (nrem > isa->isa_opt->isa_namesz)) { 1038 size_t mlen, tlen, hlen = optr - name; 1039 size_t no; 1040 char *lptr; 1041 Isa_opt *opt = isa->isa_opt; 1042 1043 (void) strncpy(nptr, opt->isa_name, 1044 opt->isa_namesz); 1045 nptr = nptr + opt->isa_namesz; 1046 nrem -= opt->isa_namesz; 1047 1048 optr += MSG_STR_ISALIST_SIZE; 1049 expanded = _expanded = 1; 1050 1051 tlen = strlen(optr); 1052 1053 /* 1054 * As ISALIST expands to a number of elements, 1055 * establish a new list to return to the caller. 1056 * This will contain the present path being 1057 * processed redefined for each isalist option, 1058 * plus the original remaining list entries. 1059 */ 1060 mlen = ((hlen + tlen) * (isa->isa_optno - 1)) + 1061 isa->isa_listsz - opt->isa_namesz; 1062 if (*next) 1063 mlen += strlen(*next); 1064 if ((_next = lptr = libld_malloc(mlen)) == 0) 1065 return (0); 1066 1067 for (no = 1, opt++; no < isa->isa_optno; 1068 no++, opt++) { 1069 (void) strncpy(lptr, name, hlen); 1070 lptr = lptr + hlen; 1071 (void) strncpy(lptr, opt->isa_name, 1072 opt->isa_namesz); 1073 lptr = lptr + opt->isa_namesz; 1074 (void) strncpy(lptr, optr, tlen); 1075 lptr = lptr + tlen; 1076 *lptr++ = ':'; 1077 } 1078 if (*next) 1079 (void) strcpy(lptr, *next); 1080 else 1081 *--lptr = '\0'; 1082 } 1083 } 1084 1085 /* 1086 * If no expansion occurred skip the $ and continue. 1087 */ 1088 if (_expanded == 0) 1089 *nptr++ = *optr++, nrem--; 1090 } 1091 1092 /* 1093 * If any ISALIST processing has occurred not only do we return the 1094 * expanded node we're presently working on, but we must also update the 1095 * remaining list so that it is effectively prepended with this node 1096 * expanded to all remaining isalist options. Note that we can only 1097 * handle one ISALIST per node. For more than one ISALIST to be 1098 * processed we'd need a better algorithm than above to replace the 1099 * newly generated list. Whether we want to encourage the number of 1100 * pathname permutations this would provide is another question. So, for 1101 * now if more than one ISALIST is encountered we return the original 1102 * node untouched. 1103 */ 1104 if (isaflag) { 1105 if (isaflag == 1) 1106 *next = _next; 1107 else 1108 return ((char *)name); 1109 } 1110 1111 *nptr = '\0'; 1112 1113 if (expanded) { 1114 if ((nptr = libld_malloc(strlen(_name) + 1)) == 0) 1115 return ((char *)name); 1116 (void) strcpy(nptr, _name); 1117 return (nptr); 1118 } 1119 return ((char *)name); 1120 } 1121 1122 /* 1123 * The Solaris ld does not put DT_VERSYM in the dynamic section, but the 1124 * GNU ld does, and it is used by the runtime linker to implement their 1125 * versioning scheme. Use this fact to determine if the sharable object 1126 * was produced by the GNU ld rather than the Solaris one, and to set 1127 * FLG_IF_GNUVER if so. This needs to be done before the symbols are 1128 * processed, since the answer determines whether we interpret the 1129 * symbols versions according to Solaris or GNU rules. 1130 */ 1131 /*ARGSUSED*/ 1132 static uintptr_t 1133 process_dynamic_isgnu(const char *name, Ifl_desc *ifl, Shdr *shdr, 1134 Elf_Scn *scn, Word ndx, int ident, Ofl_desc *ofl) 1135 { 1136 Dyn *dyn; 1137 Elf_Data *dp; 1138 uintptr_t error; 1139 1140 error = process_section(name, ifl, shdr, scn, ndx, ident, ofl); 1141 if ((error == 0) || (error == S_ERROR)) 1142 return (error); 1143 1144 /* Get the .dynamic data */ 1145 dp = elf_getdata(scn, NULL); 1146 1147 for (dyn = (Dyn *)dp->d_buf; dyn->d_tag != DT_NULL; dyn++) { 1148 if (dyn->d_tag == DT_VERSYM) { 1149 ifl->ifl_flags |= FLG_IF_GNUVER; 1150 break; 1151 } 1152 } 1153 return (1); 1154 } 1155 1156 /* 1157 * Process a dynamic section. If we are processing an explicit shared object 1158 * then we need to determine if it has a recorded SONAME, if so, this name will 1159 * be recorded in the output file being generated as the NEEDED entry rather 1160 * than the shared objects filename itself. 1161 * If the mode of the link-edit indicates that no undefined symbols should 1162 * remain, then we also need to build up a list of any additional shared object 1163 * dependencies this object may have. In this case save any NEEDED entries 1164 * together with any associated run-path specifications. This information is 1165 * recorded on the `ofl_soneed' list and will be analyzed after all explicit 1166 * file processing has been completed (refer finish_libs()). 1167 */ 1168 static uintptr_t 1169 process_dynamic(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 1170 { 1171 Dyn *data, *dyn; 1172 char *str, *rpath = NULL; 1173 const char *soname, *needed; 1174 1175 data = (Dyn *)isc->is_indata->d_buf; 1176 str = (char *)ifl->ifl_isdesc[isc->is_shdr->sh_link]->is_indata->d_buf; 1177 1178 /* 1179 * First loop through the dynamic section looking for a run path. 1180 */ 1181 if (ofl->ofl_flags & (FLG_OF_NOUNDEF | FLG_OF_SYMBOLIC)) { 1182 for (dyn = data; dyn->d_tag != DT_NULL; dyn++) { 1183 if ((dyn->d_tag != DT_RPATH) && 1184 (dyn->d_tag != DT_RUNPATH)) 1185 continue; 1186 if ((rpath = str + (size_t)dyn->d_un.d_val) == NULL) 1187 continue; 1188 break; 1189 } 1190 } 1191 1192 /* 1193 * Now look for any needed dependencies (which may use the rpath) 1194 * or a new SONAME. 1195 */ 1196 for (dyn = data; dyn->d_tag != DT_NULL; dyn++) { 1197 if (dyn->d_tag == DT_SONAME) { 1198 if ((soname = str + (size_t)dyn->d_un.d_val) == NULL) 1199 continue; 1200 1201 /* 1202 * Update the input file structure with this new name. 1203 */ 1204 ifl->ifl_soname = soname; 1205 1206 } else if ((dyn->d_tag == DT_NEEDED) || 1207 (dyn->d_tag == DT_USED)) { 1208 Sdf_desc *sdf; 1209 1210 if (!(ofl->ofl_flags & 1211 (FLG_OF_NOUNDEF | FLG_OF_SYMBOLIC))) 1212 continue; 1213 if ((needed = str + (size_t)dyn->d_un.d_val) == NULL) 1214 continue; 1215 1216 /* 1217 * Determine if this needed entry is already recorded on 1218 * the shared object needed list, if not create a new 1219 * definition for later processing (see finish_libs()). 1220 */ 1221 needed = expand(ifl->ifl_name, needed, NULL); 1222 1223 if ((sdf = sdf_find(needed, ofl->ofl_soneed)) == NULL) { 1224 if ((sdf = sdf_add(needed, 1225 &ofl->ofl_soneed)) == (Sdf_desc *)S_ERROR) 1226 return (S_ERROR); 1227 sdf->sdf_rfile = ifl->ifl_name; 1228 } 1229 1230 /* 1231 * Record the runpath (Note that we take the first 1232 * runpath which is exactly what ld.so.1 would do during 1233 * its dependency processing). 1234 */ 1235 if (rpath && (sdf->sdf_rpath == 0)) 1236 sdf->sdf_rpath = rpath; 1237 1238 } else if (dyn->d_tag == DT_FLAGS_1) { 1239 if (dyn->d_un.d_val & (DF_1_INITFIRST | DF_1_INTERPOSE)) 1240 ifl->ifl_flags &= ~FLG_IF_LAZYLD; 1241 if (dyn->d_un.d_val & DF_1_DISPRELPND) 1242 ifl->ifl_flags |= FLG_IF_DISPPEND; 1243 if (dyn->d_un.d_val & DF_1_DISPRELDNE) 1244 ifl->ifl_flags |= FLG_IF_DISPDONE; 1245 if (dyn->d_un.d_val & DF_1_NODIRECT) 1246 ifl->ifl_flags |= FLG_IF_NODIRECT; 1247 1248 } else if ((dyn->d_tag == DT_AUDIT) && 1249 (ifl->ifl_flags & FLG_IF_NEEDED)) { 1250 /* 1251 * Record audit string as DT_DEPAUDIT. 1252 */ 1253 if ((ofl->ofl_depaudit = add_string(ofl->ofl_depaudit, 1254 (str + (size_t)dyn->d_un.d_val))) == 1255 (const char *)S_ERROR) 1256 return (S_ERROR); 1257 1258 } else if (dyn->d_tag == DT_SUNW_RTLDINF) { 1259 /* 1260 * If a library has the SUNW_RTLDINF .dynamic entry 1261 * then we must not permit lazyloading of this library. 1262 * This is because critical startup information (TLS 1263 * routines) are provided as part of these interfaces 1264 * and we must have them as part of process startup. 1265 */ 1266 ifl->ifl_flags &= ~FLG_IF_LAZYLD; 1267 } 1268 } 1269 1270 /* 1271 * Perform some SONAME sanity checks. 1272 */ 1273 if (ifl->ifl_flags & FLG_IF_NEEDED) { 1274 Ifl_desc *sifl; 1275 Aliste idx; 1276 1277 /* 1278 * Determine if anyone else will cause the same SONAME to be 1279 * used (this is either caused by two different files having the 1280 * same SONAME, or by one file SONAME actually matching another 1281 * file basename (if no SONAME is specified within a shared 1282 * library its basename will be used)). Probably rare, but some 1283 * idiot will do it. 1284 */ 1285 for (APLIST_TRAVERSE(ofl->ofl_sos, idx, sifl)) { 1286 if ((strcmp(ifl->ifl_soname, sifl->ifl_soname) == 0) && 1287 (ifl != sifl)) { 1288 const char *hint, *iflb, *siflb; 1289 1290 /* 1291 * Determine the basename of each file. Perhaps 1292 * there are multiple copies of the same file 1293 * being brought in using different -L search 1294 * paths, and if so give an extra hint in the 1295 * error message. 1296 */ 1297 iflb = strrchr(ifl->ifl_name, '/'); 1298 if (iflb == NULL) 1299 iflb = ifl->ifl_name; 1300 else 1301 iflb++; 1302 1303 siflb = strrchr(sifl->ifl_name, '/'); 1304 if (siflb == NULL) 1305 siflb = sifl->ifl_name; 1306 else 1307 siflb++; 1308 1309 if (strcmp(iflb, siflb) == 0) 1310 hint = MSG_INTL(MSG_REC_CNFLTHINT); 1311 else 1312 hint = MSG_ORIG(MSG_STR_EMPTY); 1313 1314 eprintf(ofl->ofl_lml, ERR_FATAL, 1315 MSG_INTL(MSG_REC_OBJCNFLT), sifl->ifl_name, 1316 ifl->ifl_name, sifl->ifl_soname, hint); 1317 ofl->ofl_flags |= FLG_OF_FATAL; 1318 return (0); 1319 } 1320 } 1321 1322 /* 1323 * If the SONAME is the same as the name the user wishes to 1324 * record when building a dynamic library (refer -h option), 1325 * we also have a name clash. 1326 */ 1327 if (ofl->ofl_soname && 1328 (strcmp(ofl->ofl_soname, ifl->ifl_soname) == 0)) { 1329 eprintf(ofl->ofl_lml, ERR_FATAL, 1330 MSG_INTL(MSG_REC_OPTCNFLT), ifl->ifl_name, 1331 MSG_INTL(MSG_MARG_SONAME), ifl->ifl_soname); 1332 ofl->ofl_flags |= FLG_OF_FATAL; 1333 return (0); 1334 } 1335 } 1336 return (1); 1337 } 1338 1339 /* 1340 * Process a progbits section from a relocatable object (ET_REL). 1341 * This is used on non-amd64 objects to recognize .eh_frame sections. 1342 */ 1343 /*ARGSUSED1*/ 1344 static uintptr_t 1345 process_progbits_final(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 1346 { 1347 if (isc->is_osdesc && (isc->is_flags & FLG_IS_EHFRAME) && 1348 (ld_unwind_register(isc->is_osdesc, ofl) == S_ERROR)) 1349 return (S_ERROR); 1350 1351 return (1); 1352 } 1353 1354 /* 1355 * Process a group section. 1356 */ 1357 static uintptr_t 1358 process_group(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 1359 Word ndx, int ident, Ofl_desc *ofl) 1360 { 1361 uintptr_t error; 1362 1363 error = process_section(name, ifl, shdr, scn, ndx, ident, ofl); 1364 if ((error == 0) || (error == S_ERROR)) 1365 return (error); 1366 1367 /* 1368 * Indicate that this input file has groups to process. Groups are 1369 * processed after all input sections have been processed. 1370 */ 1371 ifl->ifl_flags |= FLG_IS_GROUPS; 1372 1373 return (1); 1374 } 1375 1376 /* 1377 * Process a relocation entry. At this point all input sections from this 1378 * input file have been assigned an input section descriptor which is saved 1379 * in the `ifl_isdesc' array. 1380 */ 1381 static uintptr_t 1382 rel_process(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 1383 { 1384 Word rndx; 1385 Is_desc *risc; 1386 Os_desc *osp; 1387 Shdr *shdr = isc->is_shdr; 1388 Conv_inv_buf_t inv_buf; 1389 1390 /* 1391 * Make sure this is a valid relocation we can handle. 1392 */ 1393 if (shdr->sh_type != ld_targ.t_m.m_rel_sht_type) { 1394 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_FIL_INVALSEC), 1395 ifl->ifl_name, isc->is_name, 1396 conv_sec_type(ifl->ifl_ehdr->e_machine, 1397 shdr->sh_type, 0, &inv_buf)); 1398 ofl->ofl_flags |= FLG_OF_FATAL; 1399 return (0); 1400 } 1401 1402 /* 1403 * From the relocation section header information determine which 1404 * section needs the actual relocation. Determine which output section 1405 * this input section has been assigned to and add to its relocation 1406 * list. Note that the relocation section may be null if it is not 1407 * required (ie. .debug, .stabs, etc). 1408 */ 1409 rndx = shdr->sh_info; 1410 if (rndx >= ifl->ifl_shnum) { 1411 /* 1412 * Broken input file. 1413 */ 1414 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_FIL_INVSHINFO), 1415 ifl->ifl_name, isc->is_name, EC_XWORD(rndx)); 1416 ofl->ofl_flags |= FLG_OF_FATAL; 1417 return (0); 1418 } 1419 if (rndx == 0) { 1420 if (aplist_append(&ofl->ofl_extrarels, isc, 1421 AL_CNT_OFL_RELS) == NULL) 1422 return (S_ERROR); 1423 1424 } else if ((risc = ifl->ifl_isdesc[rndx]) != NULL) { 1425 /* 1426 * Discard relocations if they are against a section 1427 * which has been discarded. 1428 */ 1429 if (risc->is_flags & FLG_IS_DISCARD) 1430 return (1); 1431 1432 if ((osp = risc->is_osdesc) == NULL) { 1433 if (risc->is_shdr->sh_type == SHT_SUNW_move) { 1434 /* 1435 * This section is processed later in 1436 * process_movereloc(). 1437 */ 1438 if (aplist_append(&ofl->ofl_ismoverel, 1439 isc, AL_CNT_OFL_MOVE) == NULL) 1440 return (S_ERROR); 1441 return (1); 1442 } 1443 eprintf(ofl->ofl_lml, ERR_FATAL, 1444 MSG_INTL(MSG_FIL_INVRELOC1), ifl->ifl_name, 1445 isc->is_name, risc->is_name); 1446 return (0); 1447 } 1448 if (aplist_append(&osp->os_relisdescs, isc, 1449 AL_CNT_OS_RELISDESCS) == NULL) 1450 return (S_ERROR); 1451 } 1452 return (1); 1453 } 1454 1455 /* 1456 * SHF_EXCLUDE flags is set for this section. 1457 */ 1458 static uintptr_t 1459 process_exclude(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 1460 Word ndx, Ofl_desc *ofl) 1461 { 1462 /* 1463 * Sections SHT_SYMTAB and SHT_DYNDYM, even if SHF_EXCLUDE is on, might 1464 * be needed for ld processing. These sections need to be in the 1465 * internal table. Later it will be determined whether they can be 1466 * eliminated or not. 1467 */ 1468 if (shdr->sh_type == SHT_SYMTAB || shdr->sh_type == SHT_DYNSYM) 1469 return (0); 1470 1471 /* 1472 * Other checks 1473 */ 1474 if (shdr->sh_flags & SHF_ALLOC) { 1475 /* 1476 * A conflict, issue an warning message, and ignore the section. 1477 */ 1478 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_FIL_EXCLUDE), 1479 ifl->ifl_name, name); 1480 return (0); 1481 } 1482 1483 /* 1484 * This sections is not going to the output file. 1485 */ 1486 return (process_section(name, ifl, shdr, scn, ndx, 0, ofl)); 1487 } 1488 1489 /* 1490 * Section processing state table. `Initial' describes the required initial 1491 * procedure to be called (if any), `Final' describes the final processing 1492 * procedure (ie. things that can only be done when all required sections 1493 * have been collected). 1494 */ 1495 typedef uintptr_t (* initial_func_t)(const char *, Ifl_desc *, Shdr *, 1496 Elf_Scn *, Word, int, Ofl_desc *); 1497 1498 static initial_func_t Initial[SHT_NUM][2] = { 1499 /* ET_REL ET_DYN */ 1500 1501 /* SHT_NULL */ invalid_section, invalid_section, 1502 /* SHT_PROGBITS */ process_progbits, process_progbits, 1503 /* SHT_SYMTAB */ process_input, process_input, 1504 /* SHT_STRTAB */ process_strtab, process_strtab, 1505 /* SHT_RELA */ process_reloc, process_reloc, 1506 /* SHT_HASH */ invalid_section, NULL, 1507 /* SHT_DYNAMIC */ process_rel_dynamic, process_dynamic_isgnu, 1508 /* SHT_NOTE */ process_section, NULL, 1509 /* SHT_NOBITS */ process_nobits, process_nobits, 1510 /* SHT_REL */ process_reloc, process_reloc, 1511 /* SHT_SHLIB */ process_section, invalid_section, 1512 /* SHT_DYNSYM */ invalid_section, process_input, 1513 /* SHT_UNKNOWN12 */ process_progbits, process_progbits, 1514 /* SHT_UNKNOWN13 */ process_progbits, process_progbits, 1515 /* SHT_INIT_ARRAY */ process_array, NULL, 1516 /* SHT_FINI_ARRAY */ process_array, NULL, 1517 /* SHT_PREINIT_ARRAY */ process_array, NULL, 1518 /* SHT_GROUP */ process_group, invalid_section, 1519 /* SHT_SYMTAB_SHNDX */ process_sym_shndx, NULL 1520 }; 1521 1522 typedef uintptr_t (* final_func_t)(Is_desc *, Ifl_desc *, Ofl_desc *); 1523 1524 static final_func_t Final[SHT_NUM][2] = { 1525 /* ET_REL ET_DYN */ 1526 1527 /* SHT_NULL */ NULL, NULL, 1528 /* SHT_PROGBITS */ process_progbits_final, NULL, 1529 /* SHT_SYMTAB */ ld_sym_process, ld_sym_process, 1530 /* SHT_STRTAB */ NULL, NULL, 1531 /* SHT_RELA */ rel_process, NULL, 1532 /* SHT_HASH */ NULL, NULL, 1533 /* SHT_DYNAMIC */ NULL, process_dynamic, 1534 /* SHT_NOTE */ NULL, NULL, 1535 /* SHT_NOBITS */ NULL, NULL, 1536 /* SHT_REL */ rel_process, NULL, 1537 /* SHT_SHLIB */ NULL, NULL, 1538 /* SHT_DYNSYM */ NULL, ld_sym_process, 1539 /* SHT_UNKNOWN12 */ NULL, NULL, 1540 /* SHT_UNKNOWN13 */ NULL, NULL, 1541 /* SHT_INIT_ARRAY */ array_process, NULL, 1542 /* SHT_FINI_ARRAY */ array_process, NULL, 1543 /* SHT_PREINIT_ARRAY */ array_process, NULL, 1544 /* SHT_GROUP */ NULL, NULL, 1545 /* SHT_SYMTAB_SHNDX */ sym_shndx_process, NULL 1546 }; 1547 1548 #define MAXNDXSIZE 10 1549 1550 /* 1551 * Process an elf file. Each section is compared against the section state 1552 * table to determine whether it should be processed (saved), ignored, or 1553 * is invalid for the type of input file being processed. 1554 */ 1555 static uintptr_t 1556 process_elf(Ifl_desc *ifl, Elf *elf, Ofl_desc *ofl) 1557 { 1558 Elf_Scn *scn; 1559 Shdr *shdr; 1560 Word ndx, sndx, ordndx = 0, ordcnt = 0; 1561 char *str, *name, _name[MAXNDXSIZE]; 1562 Word row, column; 1563 int ident; 1564 uintptr_t error; 1565 Is_desc *vdfisp, *vndisp, *vsyisp, *sifisp, *capisp; 1566 Sdf_desc *sdf; 1567 1568 /* 1569 * First process the .shstrtab section so that later sections can 1570 * reference their name. 1571 */ 1572 ld_sup_file(ofl, ifl->ifl_name, elf_kind(elf), ifl->ifl_flags, elf); 1573 1574 sndx = ifl->ifl_shstrndx; 1575 if ((scn = elf_getscn(elf, (size_t)sndx)) == NULL) { 1576 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_GETSCN), 1577 ifl->ifl_name); 1578 ofl->ofl_flags |= FLG_OF_FATAL; 1579 return (0); 1580 } 1581 if ((shdr = elf_getshdr(scn)) == NULL) { 1582 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_GETSHDR), 1583 ifl->ifl_name); 1584 ofl->ofl_flags |= FLG_OF_FATAL; 1585 return (0); 1586 } 1587 if ((name = elf_strptr(elf, (size_t)sndx, (size_t)shdr->sh_name)) == 1588 NULL) { 1589 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_STRPTR), 1590 ifl->ifl_name); 1591 ofl->ofl_flags |= FLG_OF_FATAL; 1592 return (0); 1593 } 1594 1595 if (ld_sup_input_section(ofl, ifl, name, &shdr, sndx, scn, 1596 elf) == S_ERROR) 1597 return (S_ERROR); 1598 1599 /* 1600 * Reset the name since the shdr->sh_name could have been changed as 1601 * part of ld_sup_input_section(). If there is no name, fabricate one 1602 * using the section index. 1603 */ 1604 if (shdr->sh_name == 0) { 1605 (void) snprintf(_name, MAXNDXSIZE, MSG_ORIG(MSG_FMT_INDEX), 1606 EC_XWORD(sndx)); 1607 if ((name = libld_malloc(strlen(_name) + 1)) == 0) 1608 return (S_ERROR); 1609 (void) strcpy(name, _name); 1610 1611 } else if ((name = elf_strptr(elf, (size_t)sndx, 1612 (size_t)shdr->sh_name)) == NULL) { 1613 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_STRPTR), 1614 ifl->ifl_name); 1615 ofl->ofl_flags |= FLG_OF_FATAL; 1616 return (0); 1617 } 1618 1619 error = process_strtab(name, ifl, shdr, scn, sndx, FALSE, ofl); 1620 if ((error == 0) || (error == S_ERROR)) 1621 return (error); 1622 str = ifl->ifl_isdesc[sndx]->is_indata->d_buf; 1623 1624 /* 1625 * Determine the state table column from the input file type. Note, 1626 * shared library sections are not added to the output section list. 1627 */ 1628 if (ifl->ifl_ehdr->e_type == ET_DYN) { 1629 column = 1; 1630 ofl->ofl_soscnt++; 1631 ident = ld_targ.t_id.id_null; 1632 } else { 1633 column = 0; 1634 ofl->ofl_objscnt++; 1635 ident = ld_targ.t_id.id_unknown; 1636 } 1637 1638 DBG_CALL(Dbg_file_generic(ofl->ofl_lml, ifl)); 1639 ndx = 0; 1640 vdfisp = vndisp = vsyisp = sifisp = capisp = 0; 1641 scn = NULL; 1642 while (scn = elf_nextscn(elf, scn)) { 1643 ndx++; 1644 1645 /* 1646 * As we've already processed the .shstrtab don't do it again. 1647 */ 1648 if (ndx == sndx) 1649 continue; 1650 1651 if ((shdr = elf_getshdr(scn)) == NULL) { 1652 eprintf(ofl->ofl_lml, ERR_ELF, 1653 MSG_INTL(MSG_ELF_GETSHDR), ifl->ifl_name); 1654 ofl->ofl_flags |= FLG_OF_FATAL; 1655 return (0); 1656 } 1657 name = str + (size_t)(shdr->sh_name); 1658 1659 if (ld_sup_input_section(ofl, ifl, name, &shdr, ndx, scn, 1660 elf) == S_ERROR) 1661 return (S_ERROR); 1662 1663 /* 1664 * Reset the name since the shdr->sh_name could have been 1665 * changed as part of ld_sup_input_section(). If there is no 1666 * name, fabricate one using the section index. 1667 */ 1668 if (shdr->sh_name == 0) { 1669 (void) snprintf(_name, MAXNDXSIZE, 1670 MSG_ORIG(MSG_FMT_INDEX), EC_XWORD(ndx)); 1671 if ((name = libld_malloc(strlen(_name) + 1)) == 0) 1672 return (S_ERROR); 1673 (void) strcpy(name, _name); 1674 } else 1675 name = str + (size_t)(shdr->sh_name); 1676 1677 row = shdr->sh_type; 1678 1679 /* 1680 * If the section has the SHF_EXCLUDE flag on, and we're not 1681 * generating a relocatable object, exclude the section. 1682 */ 1683 if (((shdr->sh_flags & SHF_EXCLUDE) != 0) && 1684 ((ofl->ofl_flags & FLG_OF_RELOBJ) == 0)) { 1685 if ((error = process_exclude(name, ifl, shdr, scn, 1686 ndx, ofl)) == S_ERROR) 1687 return (S_ERROR); 1688 if (error == 1) 1689 continue; 1690 } 1691 1692 /* 1693 * If this is a standard section type process it via the 1694 * appropriate action routine. 1695 */ 1696 if (row < SHT_NUM) { 1697 if (Initial[row][column] != NULL) { 1698 if (Initial[row][column](name, ifl, shdr, scn, 1699 ndx, ident, ofl) == S_ERROR) 1700 return (S_ERROR); 1701 } 1702 } else { 1703 /* 1704 * If this section is below SHT_LOSUNW then we don't 1705 * really know what to do with it, issue a warning 1706 * message but do the basic section processing anyway. 1707 */ 1708 if (row < (Word)SHT_LOSUNW) { 1709 Conv_inv_buf_t inv_buf; 1710 1711 eprintf(ofl->ofl_lml, ERR_WARNING, 1712 MSG_INTL(MSG_FIL_INVALSEC), ifl->ifl_name, 1713 name, 1714 conv_sec_type(ifl->ifl_ehdr->e_machine, 1715 shdr->sh_type, 0, &inv_buf)); 1716 } 1717 1718 /* 1719 * Handle sections greater than SHT_LOSUNW. 1720 */ 1721 switch (row) { 1722 case SHT_SUNW_dof: 1723 if (process_section(name, ifl, shdr, scn, 1724 ndx, ident, ofl) == S_ERROR) 1725 return (S_ERROR); 1726 break; 1727 case SHT_SUNW_cap: 1728 if (process_section(name, ifl, shdr, scn, ndx, 1729 ld_targ.t_id.id_null, ofl) == S_ERROR) 1730 return (S_ERROR); 1731 capisp = ifl->ifl_isdesc[ndx]; 1732 break; 1733 case SHT_SUNW_DEBUGSTR: 1734 case SHT_SUNW_DEBUG: 1735 if (process_debug(name, ifl, shdr, scn, 1736 ndx, ident, ofl) == S_ERROR) 1737 return (S_ERROR); 1738 break; 1739 case SHT_SUNW_move: 1740 if (process_section(name, ifl, shdr, scn, ndx, 1741 ld_targ.t_id.id_null, ofl) == S_ERROR) 1742 return (S_ERROR); 1743 break; 1744 case SHT_SUNW_syminfo: 1745 if (process_section(name, ifl, shdr, scn, ndx, 1746 ld_targ.t_id.id_null, ofl) == S_ERROR) 1747 return (S_ERROR); 1748 sifisp = ifl->ifl_isdesc[ndx]; 1749 break; 1750 case SHT_SUNW_ANNOTATE: 1751 if (process_progbits(name, ifl, shdr, scn, 1752 ndx, ident, ofl) == S_ERROR) 1753 return (S_ERROR); 1754 break; 1755 case SHT_SUNW_COMDAT: 1756 if (process_progbits(name, ifl, shdr, scn, 1757 ndx, ident, ofl) == S_ERROR) 1758 return (S_ERROR); 1759 ifl->ifl_isdesc[ndx]->is_flags |= FLG_IS_COMDAT; 1760 break; 1761 case SHT_SUNW_verdef: 1762 if (process_section(name, ifl, shdr, scn, ndx, 1763 ld_targ.t_id.id_null, ofl) == S_ERROR) 1764 return (S_ERROR); 1765 vdfisp = ifl->ifl_isdesc[ndx]; 1766 break; 1767 case SHT_SUNW_verneed: 1768 if (process_section(name, ifl, shdr, scn, ndx, 1769 ld_targ.t_id.id_null, ofl) == S_ERROR) 1770 return (S_ERROR); 1771 vndisp = ifl->ifl_isdesc[ndx]; 1772 break; 1773 case SHT_SUNW_versym: 1774 if (process_section(name, ifl, shdr, scn, ndx, 1775 ld_targ.t_id.id_null, ofl) == S_ERROR) 1776 return (S_ERROR); 1777 vsyisp = ifl->ifl_isdesc[ndx]; 1778 break; 1779 case SHT_SPARC_GOTDATA: 1780 /* 1781 * SHT_SPARC_GOTDATA (0x70000000) is in the 1782 * SHT_LOPROC - SHT_HIPROC range reserved 1783 * for processor-specific semantics. It is 1784 * only meaningful for sparc targets. 1785 */ 1786 if (ld_targ.t_m.m_mach != 1787 LD_TARG_BYCLASS(EM_SPARC, EM_SPARCV9)) 1788 goto do_default; 1789 if (process_section(name, ifl, shdr, scn, ndx, 1790 ld_targ.t_id.id_gotdata, ofl) == S_ERROR) 1791 return (S_ERROR); 1792 break; 1793 #if defined(_ELF64) 1794 case SHT_AMD64_UNWIND: 1795 /* 1796 * SHT_AMD64_UNWIND (0x70000001) is in the 1797 * SHT_LOPROC - SHT_HIPROC range reserved 1798 * for processor-specific semantics. It is 1799 * only meaningful for amd64 targets. 1800 */ 1801 if (ld_targ.t_m.m_mach != EM_AMD64) 1802 goto do_default; 1803 1804 /* 1805 * Target is x86, so this really is 1806 * SHT_AMD64_UNWIND 1807 */ 1808 if (column == 0) { 1809 /* 1810 * column == ET_REL 1811 */ 1812 if (process_section(name, ifl, shdr, 1813 scn, ndx, ld_targ.t_id.id_unwind, 1814 ofl) == S_ERROR) 1815 return (S_ERROR); 1816 ifl->ifl_isdesc[ndx]->is_flags |= 1817 FLG_IS_EHFRAME; 1818 } 1819 break; 1820 #endif 1821 default: 1822 do_default: 1823 if (process_section(name, ifl, shdr, scn, ndx, 1824 ((ident == ld_targ.t_id.id_null) ? 1825 ident : ld_targ.t_id.id_user), ofl) == 1826 S_ERROR) 1827 return (S_ERROR); 1828 break; 1829 } 1830 } 1831 } 1832 1833 /* 1834 * Now that all input sections have been analyzed, and prior to placing 1835 * any input sections to their output sections, process any groups. 1836 * Groups can contribute COMDAT items, which may get discarded as part 1837 * of placement. In addition, COMDAT names may require transformation 1838 * to indicate different output section placement. 1839 */ 1840 if (ifl->ifl_flags & FLG_IS_GROUPS) { 1841 for (ndx = 1; ndx < ifl->ifl_shnum; ndx++) { 1842 Is_desc *isp; 1843 1844 if (((isp = ifl->ifl_isdesc[ndx]) == NULL) || 1845 (isp->is_shdr->sh_type != SHT_GROUP)) 1846 continue; 1847 1848 if (ld_group_process(isp, ofl) == S_ERROR) 1849 return (S_ERROR); 1850 } 1851 } 1852 1853 /* 1854 * Now that all of input sections have been processed, place them 1855 * in the appropriate output sections. 1856 */ 1857 for (ndx = 1; ndx < ifl->ifl_shnum; ndx++) { 1858 Is_desc *isp; 1859 Shdr *shdr; 1860 1861 if (((isp = ifl->ifl_isdesc[ndx]) == NULL) || 1862 ((isp->is_flags & FLG_IS_PLACE) == 0)) 1863 continue; 1864 1865 shdr = isp->is_shdr; 1866 1867 /* 1868 * Place all non-ordered sections within their appropriate 1869 * output section. 1870 * 1871 * Ordered sections are sorted based on the relative ordering 1872 * of the section pointed to by the sh_info entry. An ordered 1873 * section, whose sh_link points to itself, must also be placed 1874 * in the output image so as to control the ordered processing 1875 * that follows (see FLG_IF_ORDERED below). 1876 */ 1877 if (((isp->is_flags & FLG_IS_ORDERED) == 0) || 1878 ((ndx == shdr->sh_link) && 1879 (shdr->sh_flags & SHF_ORDERED))) { 1880 if (ld_place_section(ofl, isp, 1881 isp->is_keyident, 0) == (Os_desc *)S_ERROR) 1882 return (S_ERROR); 1883 } 1884 1885 /* 1886 * If a section requires ordered processing, keep track of the 1887 * section index and count to optimize later section traversal. 1888 */ 1889 if (isp->is_flags & FLG_IS_ORDERED) { 1890 ordcnt++; 1891 if (ordndx == 0) 1892 ordndx = ndx; 1893 } 1894 } 1895 1896 /* 1897 * Some sections have special ordering requirements, that are based off 1898 * of the section pointed to by their sh_info entry. This controlling 1899 * section will have been placed (above), and thus any ordered sections 1900 * can now be processed. 1901 */ 1902 if (ifl->ifl_flags & FLG_IF_ORDERED) { 1903 Word cnt = 0; 1904 1905 for (ndx = ordndx; 1906 (ndx < ifl->ifl_shnum) && (cnt < ordcnt); ndx++) { 1907 Is_desc *isp; 1908 1909 if (((isp = ifl->ifl_isdesc[ndx]) == NULL) || 1910 ((isp->is_flags & FLG_IS_ORDERED) == 0)) 1911 continue; 1912 1913 if (ld_process_ordered(ifl, ofl, ndx, 1914 ifl->ifl_shnum) == S_ERROR) 1915 return (S_ERROR); 1916 } 1917 } 1918 1919 /* 1920 * If this is an explicit shared object determine if the user has 1921 * specified a control definition. This descriptor may specify which 1922 * version definitions can be used from this object (it may also update 1923 * the dependency to USED and supply an alternative SONAME). 1924 */ 1925 sdf = 0; 1926 if (column && (ifl->ifl_flags & FLG_IF_NEEDED)) { 1927 const char *base; 1928 1929 /* 1930 * Use the basename of the input file (typically this is the 1931 * compilation environment name, ie. libfoo.so). 1932 */ 1933 if ((base = strrchr(ifl->ifl_name, '/')) == NULL) 1934 base = ifl->ifl_name; 1935 else 1936 base++; 1937 1938 if ((sdf = sdf_find(base, ofl->ofl_socntl)) != NULL) { 1939 sdf->sdf_file = ifl; 1940 ifl->ifl_sdfdesc = sdf; 1941 } 1942 } 1943 1944 /* 1945 * Process any hardware/software capabilities sections. Only the 1946 * capabilities for input relocatable objects are propagated. If the 1947 * relocatable objects don't contain any capabilities, any capability 1948 * state that has already been gathered will prevail. 1949 */ 1950 if (capisp) 1951 process_cap(ifl, capisp, ofl); 1952 1953 /* 1954 * Process any version dependencies. These will establish shared object 1955 * `needed' entries in the same manner as will be generated from the 1956 * .dynamic's NEEDED entries. 1957 */ 1958 if (vndisp && (ofl->ofl_flags & (FLG_OF_NOUNDEF | FLG_OF_SYMBOLIC))) 1959 if (ld_vers_need_process(vndisp, ifl, ofl) == S_ERROR) 1960 return (S_ERROR); 1961 1962 /* 1963 * Before processing any symbol resolution or relocations process any 1964 * version sections. 1965 */ 1966 if (vsyisp) 1967 (void) ld_vers_sym_process(ofl->ofl_lml, vsyisp, ifl); 1968 1969 if (ifl->ifl_versym && 1970 (vdfisp || (sdf && (sdf->sdf_flags & FLG_SDF_SELECT)))) 1971 if (ld_vers_def_process(vdfisp, ifl, ofl) == S_ERROR) 1972 return (S_ERROR); 1973 1974 /* 1975 * Having collected the appropriate sections carry out any additional 1976 * processing if necessary. 1977 */ 1978 for (ndx = 0; ndx < ifl->ifl_shnum; ndx++) { 1979 Is_desc *isp; 1980 1981 if ((isp = ifl->ifl_isdesc[ndx]) == 0) 1982 continue; 1983 row = isp->is_shdr->sh_type; 1984 1985 if ((isp->is_flags & FLG_IS_DISCARD) == 0) 1986 ld_sup_section(ofl, isp->is_name, isp->is_shdr, ndx, 1987 isp->is_indata, elf); 1988 1989 /* 1990 * If this is a SHT_SUNW_move section from a relocatable file, 1991 * keep track of the section for later processing. 1992 */ 1993 if ((row == SHT_SUNW_move) && (column == 0)) { 1994 if (aplist_append(&(ofl->ofl_ismove), isp, 1995 AL_CNT_OFL_MOVE) == NULL) 1996 return (S_ERROR); 1997 } 1998 1999 /* 2000 * If this is a standard section type process it via the 2001 * appropriate action routine. 2002 */ 2003 if (row < SHT_NUM) { 2004 if (Final[row][column] != NULL) { 2005 if (Final[row][column](isp, ifl, 2006 ofl) == S_ERROR) 2007 return (S_ERROR); 2008 } 2009 #if defined(_ELF64) 2010 } else if ((row == SHT_AMD64_UNWIND) && (column == 0)) { 2011 Os_desc *osp = isp->is_osdesc; 2012 2013 /* 2014 * SHT_AMD64_UNWIND (0x70000001) is in the SHT_LOPROC - 2015 * SHT_HIPROC range reserved for processor-specific 2016 * semantics, and is only meaningful for amd64 targets. 2017 * 2018 * Only process unwind contents from relocatable 2019 * objects. 2020 */ 2021 if (osp && (ld_targ.t_m.m_mach == EM_AMD64) && 2022 (ld_unwind_register(osp, ofl) == S_ERROR)) 2023 return (S_ERROR); 2024 #endif 2025 } 2026 } 2027 2028 /* 2029 * After processing any symbol resolution, and if this dependency 2030 * indicates it contains symbols that can't be directly bound to, 2031 * set the symbols appropriately. 2032 */ 2033 if (sifisp && ((ifl->ifl_flags & (FLG_IF_NEEDED | FLG_IF_NODIRECT)) == 2034 (FLG_IF_NEEDED | FLG_IF_NODIRECT))) 2035 (void) ld_sym_nodirect(sifisp, ifl, ofl); 2036 2037 return (1); 2038 } 2039 2040 /* 2041 * Process the current input file. There are basically three types of files 2042 * that come through here: 2043 * 2044 * o files explicitly defined on the command line (ie. foo.o or bar.so), 2045 * in this case only the `name' field is valid. 2046 * 2047 * o libraries determined from the -l command line option (ie. -lbar), 2048 * in this case the `soname' field contains the basename of the located 2049 * file. 2050 * 2051 * Any shared object specified via the above two conventions must be recorded 2052 * as a needed dependency. 2053 * 2054 * o libraries specified as dependencies of those libraries already obtained 2055 * via the command line (ie. bar.so has a DT_NEEDED entry of fred.so.1), 2056 * in this case the `soname' field contains either a full pathname (if the 2057 * needed entry contained a `/'), or the basename of the located file. 2058 * These libraries are processed to verify symbol binding but are not 2059 * recorded as dependencies of the output file being generated. 2060 */ 2061 Ifl_desc * 2062 ld_process_ifl(const char *name, const char *soname, int fd, Elf *elf, 2063 Word flags, Ofl_desc *ofl, Rej_desc *rej) 2064 { 2065 Ifl_desc *ifl; 2066 Ehdr *ehdr; 2067 uintptr_t error = 0; 2068 struct stat status; 2069 Ar_desc *adp; 2070 Rej_desc _rej; 2071 2072 /* 2073 * If this file was not extracted from an archive obtain its device 2074 * information. This will be used to determine if the file has already 2075 * been processed (rather than simply comparing filenames, the device 2076 * information provides a quicker comparison and detects linked files). 2077 */ 2078 if (fd && ((flags & FLG_IF_EXTRACT) == 0)) 2079 (void) fstat(fd, &status); 2080 else { 2081 status.st_dev = 0; 2082 status.st_ino = 0; 2083 } 2084 2085 switch (elf_kind(elf)) { 2086 case ELF_K_AR: 2087 /* 2088 * Determine if we've already come across this archive file. 2089 */ 2090 if (!(flags & FLG_IF_EXTRACT)) { 2091 Aliste idx; 2092 2093 for (APLIST_TRAVERSE(ofl->ofl_ars, idx, adp)) { 2094 if ((adp->ad_stdev != status.st_dev) || 2095 (adp->ad_stino != status.st_ino)) 2096 continue; 2097 2098 /* 2099 * We've seen this file before so reuse the 2100 * original archive descriptor and discard the 2101 * new elf descriptor. Note that a file 2102 * descriptor is unnecessary, as the file is 2103 * already available in memory. 2104 */ 2105 DBG_CALL(Dbg_file_reuse(ofl->ofl_lml, name, 2106 adp->ad_name)); 2107 (void) elf_end(elf); 2108 return ((Ifl_desc *)ld_process_archive(name, -1, 2109 adp, ofl)); 2110 } 2111 } 2112 2113 /* 2114 * As we haven't processed this file before establish a new 2115 * archive descriptor. 2116 */ 2117 adp = ld_ar_setup(name, elf, ofl); 2118 if ((adp == 0) || (adp == (Ar_desc *)S_ERROR)) 2119 return ((Ifl_desc *)adp); 2120 adp->ad_stdev = status.st_dev; 2121 adp->ad_stino = status.st_ino; 2122 2123 ld_sup_file(ofl, name, ELF_K_AR, flags, elf); 2124 2125 /* 2126 * Indicate that the ELF descriptor no longer requires a file 2127 * descriptor by reading the entire file. The file is already 2128 * read via the initial mmap(2) behind elf_begin(3elf), thus 2129 * this operation is effectively a no-op. However, a side- 2130 * effect is that the internal file descriptor, maintained in 2131 * the ELF descriptor, is set to -1. This setting will not 2132 * be compared with any file descriptor that is passed to 2133 * elf_begin(), should this archive, or one of the archive 2134 * members, be processed again from the command line or 2135 * because of a -z rescan. 2136 */ 2137 if (elf_cntl(elf, ELF_C_FDREAD) == -1) { 2138 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_CNTL), 2139 name); 2140 ofl->ofl_flags |= FLG_OF_FATAL; 2141 return (NULL); 2142 } 2143 2144 return ((Ifl_desc *)ld_process_archive(name, -1, adp, ofl)); 2145 2146 case ELF_K_ELF: 2147 /* 2148 * Obtain the elf header so that we can determine what type of 2149 * elf ELF_K_ELF file this is. 2150 */ 2151 if ((ehdr = elf_getehdr(elf)) == NULL) { 2152 int _class = gelf_getclass(elf); 2153 2154 /* 2155 * Failure could occur for a number of reasons at this 2156 * point. Typically the files class is incorrect (ie. 2157 * user is building 64-bit but managed to pint at 32-bit 2158 * libraries). However any number of elf errors can 2159 * also occur, such as from a truncated or corrupt file. 2160 * Here we try and get the best error message possible. 2161 */ 2162 if (ld_targ.t_m.m_class != _class) { 2163 _rej.rej_type = SGS_REJ_CLASS; 2164 _rej.rej_info = (uint_t)_class; 2165 } else { 2166 _rej.rej_type = SGS_REJ_STR; 2167 _rej.rej_str = elf_errmsg(-1); 2168 } 2169 _rej.rej_name = name; 2170 DBG_CALL(Dbg_file_rejected(ofl->ofl_lml, &_rej, 2171 ld_targ.t_m.m_mach)); 2172 if (rej->rej_type == 0) { 2173 *rej = _rej; 2174 rej->rej_name = strdup(_rej.rej_name); 2175 } 2176 return (NULL); 2177 } 2178 2179 /* 2180 * Determine if we've already come across this file. 2181 */ 2182 if (!(flags & FLG_IF_EXTRACT)) { 2183 APlist *apl; 2184 Aliste idx; 2185 2186 if (ehdr->e_type == ET_REL) 2187 apl = ofl->ofl_objs; 2188 else 2189 apl = ofl->ofl_sos; 2190 2191 /* 2192 * Traverse the appropriate file list and determine if 2193 * a dev/inode match is found. 2194 */ 2195 for (APLIST_TRAVERSE(apl, idx, ifl)) { 2196 /* 2197 * Ifl_desc generated via -Nneed, therefore no 2198 * actual file behind it. 2199 */ 2200 if (ifl->ifl_flags & FLG_IF_NEEDSTR) 2201 continue; 2202 2203 if ((ifl->ifl_stino != status.st_ino) || 2204 (ifl->ifl_stdev != status.st_dev)) 2205 continue; 2206 2207 /* 2208 * Disregard (skip) this image. 2209 */ 2210 DBG_CALL(Dbg_file_skip(ofl->ofl_lml, 2211 ifl->ifl_name, name)); 2212 (void) elf_end(elf); 2213 2214 /* 2215 * If the file was explicitly defined on the 2216 * command line (this is always the case for 2217 * relocatable objects, and is true for shared 2218 * objects when they weren't specified via -l or 2219 * were dragged in as an implicit dependency), 2220 * then warn the user. 2221 */ 2222 if ((flags & FLG_IF_CMDLINE) || 2223 (ifl->ifl_flags & FLG_IF_CMDLINE)) { 2224 const char *errmsg; 2225 2226 /* 2227 * Determine whether this is the same 2228 * file name as originally encountered 2229 * so as to provide the most 2230 * descriptive diagnostic. 2231 */ 2232 errmsg = 2233 (strcmp(name, ifl->ifl_name) == 0) ? 2234 MSG_INTL(MSG_FIL_MULINC_1) : 2235 MSG_INTL(MSG_FIL_MULINC_2); 2236 eprintf(ofl->ofl_lml, ERR_WARNING, 2237 errmsg, name, ifl->ifl_name); 2238 } 2239 return (ifl); 2240 } 2241 } 2242 2243 /* 2244 * At this point, we know we need the file. Establish an input 2245 * file descriptor and continue processing. 2246 */ 2247 ifl = ifl_setup(name, ehdr, elf, flags, ofl, rej); 2248 if ((ifl == 0) || (ifl == (Ifl_desc *)S_ERROR)) 2249 return (ifl); 2250 ifl->ifl_stdev = status.st_dev; 2251 ifl->ifl_stino = status.st_ino; 2252 2253 /* 2254 * If -zignore is in effect, mark this file as a potential 2255 * candidate (the files use isn't actually determined until 2256 * symbol resolution and relocation processing are completed). 2257 */ 2258 if (ofl->ofl_flags1 & FLG_OF1_IGNORE) 2259 ifl->ifl_flags |= FLG_IF_IGNORE; 2260 2261 switch (ehdr->e_type) { 2262 case ET_REL: 2263 (*ld_targ.t_mr.mr_mach_eflags)(ehdr, ofl); 2264 error = process_elf(ifl, elf, ofl); 2265 break; 2266 case ET_DYN: 2267 if ((ofl->ofl_flags & FLG_OF_STATIC) || 2268 !(ofl->ofl_flags & FLG_OF_DYNLIBS)) { 2269 eprintf(ofl->ofl_lml, ERR_FATAL, 2270 MSG_INTL(MSG_FIL_SOINSTAT), name); 2271 ofl->ofl_flags |= FLG_OF_FATAL; 2272 return (NULL); 2273 } 2274 2275 /* 2276 * Record any additional shared object information. 2277 * If no soname is specified (eg. this file was 2278 * derived from a explicit filename declaration on the 2279 * command line, ie. bar.so) use the pathname. 2280 * This entry may be overridden if the files dynamic 2281 * section specifies an DT_SONAME value. 2282 */ 2283 if (soname == NULL) 2284 ifl->ifl_soname = ifl->ifl_name; 2285 else 2286 ifl->ifl_soname = soname; 2287 2288 /* 2289 * If direct bindings, lazy loading, or group 2290 * permissions need to be established, mark this object. 2291 */ 2292 if (ofl->ofl_flags1 & FLG_OF1_ZDIRECT) 2293 ifl->ifl_flags |= FLG_IF_DIRECT; 2294 if (ofl->ofl_flags1 & FLG_OF1_LAZYLD) 2295 ifl->ifl_flags |= FLG_IF_LAZYLD; 2296 if (ofl->ofl_flags1 & FLG_OF1_GRPPRM) 2297 ifl->ifl_flags |= FLG_IF_GRPPRM; 2298 error = process_elf(ifl, elf, ofl); 2299 2300 /* 2301 * At this point we know if this file will be 2302 * lazyloaded, or whether bindings to it must be direct. 2303 * In either case, a syminfo section is required. 2304 */ 2305 if (ifl->ifl_flags & (FLG_IF_LAZYLD | FLG_IF_DIRECT)) 2306 ofl->ofl_flags |= FLG_OF_SYMINFO; 2307 2308 break; 2309 default: 2310 (void) elf_errno(); 2311 _rej.rej_type = SGS_REJ_UNKFILE; 2312 _rej.rej_name = name; 2313 DBG_CALL(Dbg_file_rejected(ofl->ofl_lml, &_rej, 2314 ld_targ.t_m.m_mach)); 2315 if (rej->rej_type == 0) { 2316 *rej = _rej; 2317 rej->rej_name = strdup(_rej.rej_name); 2318 } 2319 return (NULL); 2320 } 2321 break; 2322 default: 2323 (void) elf_errno(); 2324 _rej.rej_type = SGS_REJ_UNKFILE; 2325 _rej.rej_name = name; 2326 DBG_CALL(Dbg_file_rejected(ofl->ofl_lml, &_rej, 2327 ld_targ.t_m.m_mach)); 2328 if (rej->rej_type == 0) { 2329 *rej = _rej; 2330 rej->rej_name = strdup(_rej.rej_name); 2331 } 2332 return (NULL); 2333 } 2334 if ((error == 0) || (error == S_ERROR)) 2335 return ((Ifl_desc *)error); 2336 else 2337 return (ifl); 2338 } 2339 2340 /* 2341 * Having successfully opened a file, set up the necessary elf structures to 2342 * process it further. This small section of processing is slightly different 2343 * from the elf initialization required to process a relocatable object from an 2344 * archive (see libs.c: ld_process_archive()). 2345 */ 2346 Ifl_desc * 2347 ld_process_open(const char *opath, const char *ofile, int *fd, Ofl_desc *ofl, 2348 Word flags, Rej_desc *rej) 2349 { 2350 Elf *elf; 2351 const char *npath = opath; 2352 const char *nfile = ofile; 2353 2354 if ((elf = elf_begin(*fd, ELF_C_READ, NULL)) == NULL) { 2355 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_BEGIN), npath); 2356 ofl->ofl_flags |= FLG_OF_FATAL; 2357 return (NULL); 2358 } 2359 2360 /* 2361 * Determine whether the support library wishes to process this open. 2362 * The support library may return: 2363 * . a different ELF descriptor (in which case they should have 2364 * closed the original) 2365 * . a different file descriptor (in which case they should have 2366 * closed the original) 2367 * . a different path and file name (presumably associated with 2368 * a different file descriptor) 2369 * 2370 * A file descriptor of -1, or and ELF descriptor of zero indicates 2371 * the file should be ignored. 2372 */ 2373 ld_sup_open(ofl, &npath, &nfile, fd, flags, &elf, NULL, 0, 2374 elf_kind(elf)); 2375 2376 if ((*fd == -1) || (elf == NULL)) 2377 return (NULL); 2378 2379 return (ld_process_ifl(npath, nfile, *fd, elf, flags, ofl, rej)); 2380 } 2381 2382 /* 2383 * Having successfully mapped a file, set up the necessary elf structures to 2384 * process it further. This routine is patterned after ld_process_open() and 2385 * is only called by ld.so.1(1) to process a relocatable object. 2386 */ 2387 Ifl_desc * 2388 ld_process_mem(const char *path, const char *file, char *addr, size_t size, 2389 Ofl_desc *ofl, Rej_desc *rej) 2390 { 2391 Elf *elf; 2392 2393 if ((elf = elf_memory(addr, size)) == NULL) { 2394 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_MEMORY), path); 2395 ofl->ofl_flags |= FLG_OF_FATAL; 2396 return (0); 2397 } 2398 2399 return (ld_process_ifl(path, file, 0, elf, 0, ofl, rej)); 2400 } 2401 2402 /* 2403 * Process a required library (i.e. the dependency of a shared object). 2404 * Combine the directory and filename, check the resultant path size, and try 2405 * opening the pathname. 2406 */ 2407 static Ifl_desc * 2408 process_req_lib(Sdf_desc *sdf, const char *dir, const char *file, 2409 Ofl_desc *ofl, Rej_desc *rej) 2410 { 2411 size_t dlen, plen; 2412 int fd; 2413 char path[PATH_MAX]; 2414 const char *_dir = dir; 2415 2416 /* 2417 * Determine the sizes of the directory and filename to insure we don't 2418 * exceed our buffer. 2419 */ 2420 if ((dlen = strlen(dir)) == 0) { 2421 _dir = MSG_ORIG(MSG_STR_DOT); 2422 dlen = 1; 2423 } 2424 dlen++; 2425 plen = dlen + strlen(file) + 1; 2426 if (plen > PATH_MAX) { 2427 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_FIL_PTHTOLONG), 2428 _dir, file); 2429 ofl->ofl_flags |= FLG_OF_FATAL; 2430 return (0); 2431 } 2432 2433 /* 2434 * Build the entire pathname and try and open the file. 2435 */ 2436 (void) strcpy(path, _dir); 2437 (void) strcat(path, MSG_ORIG(MSG_STR_SLASH)); 2438 (void) strcat(path, file); 2439 DBG_CALL(Dbg_libs_req(ofl->ofl_lml, sdf->sdf_name, 2440 sdf->sdf_rfile, path)); 2441 2442 if ((fd = open(path, O_RDONLY)) == -1) 2443 return (0); 2444 else { 2445 Ifl_desc *ifl; 2446 char *_path; 2447 2448 if ((_path = libld_malloc(strlen(path) + 1)) == 0) 2449 return ((Ifl_desc *)S_ERROR); 2450 (void) strcpy(_path, path); 2451 ifl = ld_process_open(_path, &_path[dlen], &fd, ofl, 0, rej); 2452 if (fd != -1) 2453 (void) close(fd); 2454 return (ifl); 2455 } 2456 } 2457 2458 /* 2459 * Finish any library processing. Walk the list of so's that have been listed 2460 * as "included" by shared objects we have previously processed. Examine them, 2461 * without adding them as explicit dependents of this program, in order to 2462 * complete our symbol definition process. The search path rules are: 2463 * 2464 * o use any user supplied paths, i.e. LD_LIBRARY_PATH and -L, then 2465 * 2466 * o use any RPATH defined within the parent shared object, then 2467 * 2468 * o use the default directories, i.e. LIBPATH or -YP. 2469 */ 2470 uintptr_t 2471 ld_finish_libs(Ofl_desc *ofl) 2472 { 2473 Aliste idx1; 2474 Sdf_desc *sdf; 2475 Rej_desc rej = { 0 }; 2476 2477 /* 2478 * Make sure we are back in dynamic mode. 2479 */ 2480 ofl->ofl_flags |= FLG_OF_DYNLIBS; 2481 2482 for (APLIST_TRAVERSE(ofl->ofl_soneed, idx1, sdf)) { 2483 Aliste idx2; 2484 char *path, *slash = NULL; 2485 int fd; 2486 Ifl_desc *ifl; 2487 char *file = (char *)sdf->sdf_name; 2488 2489 /* 2490 * See if this file has already been processed. At the time 2491 * this implicit dependency was determined there may still have 2492 * been more explicit dependencies to process. Note, if we ever 2493 * do parse the command line three times we would be able to 2494 * do all this checking when processing the dynamic section. 2495 */ 2496 if (sdf->sdf_file) 2497 continue; 2498 2499 for (APLIST_TRAVERSE(ofl->ofl_sos, idx2, ifl)) { 2500 if (!(ifl->ifl_flags & FLG_IF_NEEDSTR) && 2501 (strcmp(file, ifl->ifl_soname) == 0)) { 2502 sdf->sdf_file = ifl; 2503 break; 2504 } 2505 } 2506 if (sdf->sdf_file) 2507 continue; 2508 2509 /* 2510 * If the current path name element embeds a "/", then it's to 2511 * be taken "as is", with no searching involved. Process all 2512 * "/" occurrences, so that we can deduce the base file name. 2513 */ 2514 for (path = file; *path; path++) { 2515 if (*path == '/') 2516 slash = path; 2517 } 2518 if (slash) { 2519 DBG_CALL(Dbg_libs_req(ofl->ofl_lml, sdf->sdf_name, 2520 sdf->sdf_rfile, file)); 2521 if ((fd = open(file, O_RDONLY)) == -1) { 2522 eprintf(ofl->ofl_lml, ERR_WARNING, 2523 MSG_INTL(MSG_FIL_NOTFOUND), file, 2524 sdf->sdf_rfile); 2525 } else { 2526 Rej_desc _rej = { 0 }; 2527 2528 ifl = ld_process_open(file, ++slash, &fd, ofl, 2529 0, &_rej); 2530 if (fd != -1) 2531 (void) close(fd); 2532 if (ifl == (Ifl_desc *)S_ERROR) 2533 return (S_ERROR); 2534 2535 if (_rej.rej_type) { 2536 Conv_reject_desc_buf_t rej_buf; 2537 2538 eprintf(ofl->ofl_lml, ERR_WARNING, 2539 MSG_INTL(reject[_rej.rej_type]), 2540 _rej.rej_name ? rej.rej_name : 2541 MSG_INTL(MSG_STR_UNKNOWN), 2542 conv_reject_desc(&_rej, &rej_buf, 2543 ld_targ.t_m.m_mach)); 2544 } else 2545 sdf->sdf_file = ifl; 2546 } 2547 continue; 2548 } 2549 2550 /* 2551 * Now search for this file in any user defined directories. 2552 */ 2553 for (APLIST_TRAVERSE(ofl->ofl_ulibdirs, idx2, path)) { 2554 Rej_desc _rej = { 0 }; 2555 2556 ifl = process_req_lib(sdf, path, file, ofl, &_rej); 2557 if (ifl == (Ifl_desc *)S_ERROR) { 2558 return (S_ERROR); 2559 } 2560 if (_rej.rej_type) { 2561 if (rej.rej_type == 0) { 2562 rej = _rej; 2563 rej.rej_name = strdup(_rej.rej_name); 2564 } 2565 } 2566 if (ifl) { 2567 sdf->sdf_file = ifl; 2568 break; 2569 } 2570 } 2571 if (sdf->sdf_file) 2572 continue; 2573 2574 /* 2575 * Next use the local rules defined within the parent shared 2576 * object. 2577 */ 2578 if (sdf->sdf_rpath != NULL) { 2579 char *rpath, *next; 2580 2581 rpath = libld_malloc(strlen(sdf->sdf_rpath) + 1); 2582 if (rpath == 0) 2583 return (S_ERROR); 2584 (void) strcpy(rpath, sdf->sdf_rpath); 2585 DBG_CALL(Dbg_libs_path(ofl->ofl_lml, rpath, 2586 LA_SER_RUNPATH, sdf->sdf_rfile)); 2587 if ((path = strtok_r(rpath, 2588 MSG_ORIG(MSG_STR_COLON), &next)) != NULL) { 2589 do { 2590 Rej_desc _rej = { 0 }; 2591 2592 path = expand(sdf->sdf_rfile, path, 2593 &next); 2594 2595 ifl = process_req_lib(sdf, path, 2596 file, ofl, &_rej); 2597 if (ifl == (Ifl_desc *)S_ERROR) { 2598 return (S_ERROR); 2599 } 2600 if ((_rej.rej_type) && 2601 (rej.rej_type == 0)) { 2602 rej = _rej; 2603 rej.rej_name = 2604 strdup(_rej.rej_name); 2605 } 2606 if (ifl) { 2607 sdf->sdf_file = ifl; 2608 break; 2609 } 2610 } while ((path = strtok_r(NULL, 2611 MSG_ORIG(MSG_STR_COLON), &next)) != NULL); 2612 } 2613 } 2614 if (sdf->sdf_file) 2615 continue; 2616 2617 /* 2618 * Finally try the default library search directories. 2619 */ 2620 for (APLIST_TRAVERSE(ofl->ofl_dlibdirs, idx2, path)) { 2621 Rej_desc _rej = { 0 }; 2622 2623 ifl = process_req_lib(sdf, path, file, ofl, &rej); 2624 if (ifl == (Ifl_desc *)S_ERROR) { 2625 return (S_ERROR); 2626 } 2627 if (_rej.rej_type) { 2628 if (rej.rej_type == 0) { 2629 rej = _rej; 2630 rej.rej_name = strdup(_rej.rej_name); 2631 } 2632 } 2633 if (ifl) { 2634 sdf->sdf_file = ifl; 2635 break; 2636 } 2637 } 2638 if (sdf->sdf_file) 2639 continue; 2640 2641 /* 2642 * If we've got this far we haven't found the shared object. 2643 * If an object was found, but was rejected for some reason, 2644 * print a diagnostic to that effect, otherwise generate a 2645 * generic "not found" diagnostic. 2646 */ 2647 if (rej.rej_type) { 2648 Conv_reject_desc_buf_t rej_buf; 2649 2650 eprintf(ofl->ofl_lml, ERR_WARNING, 2651 MSG_INTL(reject[rej.rej_type]), 2652 rej.rej_name ? rej.rej_name : 2653 MSG_INTL(MSG_STR_UNKNOWN), 2654 conv_reject_desc(&rej, &rej_buf, 2655 ld_targ.t_m.m_mach)); 2656 } else { 2657 eprintf(ofl->ofl_lml, ERR_WARNING, 2658 MSG_INTL(MSG_FIL_NOTFOUND), file, sdf->sdf_rfile); 2659 } 2660 } 2661 2662 /* 2663 * Finally, now that all objects have been input, make sure any version 2664 * requirements have been met. 2665 */ 2666 return (ld_vers_verify(ofl)); 2667 } 2668