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 2010 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))) == NULL) 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 *))) == NULL) 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)) == NULL) 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, Is_desc *cisp) 242 { 243 #define FP_FLAGS (SF1_SUNW_FPKNWN | SF1_SUNW_FPUSED) 244 245 Xword badval; 246 247 /* 248 * If a mapfile has established definitions to override any object 249 * capabilities, ignore any new object capabilities. 250 */ 251 if (ofl->ofl_flags1 & FLG_OF1_OVSFCAP1) { 252 DBG_CALL(Dbg_cap_val_entry(ofl->ofl_lml, DBG_STATE_IGNORED, 253 CA_SUNW_SF_1, val, ld_targ.t_m.m_mach)); 254 return; 255 } 256 257 #if !defined(_ELF64) 258 if (ifl && (ifl->ifl_ehdr->e_type == ET_REL)) { 259 /* 260 * The SF1_SUNW_ADDR32 is only meaningful when building a 64-bit 261 * object. Warn the user, and remove the setting, if we're 262 * building a 32-bit object. 263 */ 264 if (val & SF1_SUNW_ADDR32) { 265 eprintf(ofl->ofl_lml, ERR_WARNING, 266 MSG_INTL(MSG_FIL_INADDR32SF1), ifl->ifl_name, 267 EC_WORD(cisp->is_scnndx), cisp->is_name); 268 val &= ~SF1_SUNW_ADDR32; 269 } 270 } 271 #endif 272 /* 273 * If this object doesn't specify any capabilities, ignore it, and 274 * leave the state as is. 275 */ 276 if (val == 0) 277 return; 278 279 /* 280 * Make sure we only accept known software capabilities. Note, that 281 * an F1_SUNW_FPUSED by itself is viewed as bad practice. 282 */ 283 if ((badval = (val & ~SF1_SUNW_MASK)) != 0) { 284 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_FIL_BADSF1), 285 ifl->ifl_name, EC_WORD(cisp->is_scnndx), cisp->is_name, 286 EC_XWORD(badval)); 287 val &= SF1_SUNW_MASK; 288 } 289 if ((val & FP_FLAGS) == SF1_SUNW_FPUSED) { 290 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_FIL_BADSF1), 291 ifl->ifl_name, EC_WORD(cisp->is_scnndx), cisp->is_name, 292 EC_XWORD(val)); 293 return; 294 } 295 296 /* 297 * If the input file is not a relocatable object, then we're only here 298 * to warn the user of any questionable capabilities. 299 */ 300 if (ifl->ifl_ehdr->e_type != ET_REL) { 301 #if defined(_ELF64) 302 /* 303 * If we're building a 64-bit executable, and we come across a 304 * dependency that requires a restricted address space, then 305 * that dependencies requirement can only be satisfied if the 306 * executable triggers the restricted address space. This is a 307 * warning rather than a fatal error, as the possibility exists 308 * that an appropriate dependency will be provided at runtime. 309 * The runtime linker will refuse to use this dependency. 310 */ 311 if ((val & SF1_SUNW_ADDR32) && (ofl->ofl_flags & FLG_OF_EXEC) && 312 ((ofl->ofl_ocapset.oc_sf_1.cm_val & 313 SF1_SUNW_ADDR32) == 0)) { 314 eprintf(ofl->ofl_lml, ERR_WARNING, 315 MSG_INTL(MSG_FIL_EXADDR32SF1), ifl->ifl_name, 316 EC_WORD(cisp->is_scnndx), cisp->is_name); 317 } 318 #endif 319 return; 320 } 321 322 if (DBG_ENABLED) { 323 Dbg_cap_val_entry(ofl->ofl_lml, DBG_STATE_CURRENT, CA_SUNW_SF_1, 324 ofl->ofl_ocapset.oc_sf_1.cm_val, ld_targ.t_m.m_mach); 325 Dbg_cap_val_entry(ofl->ofl_lml, DBG_STATE_NEW, CA_SUNW_SF_1, 326 val, ld_targ.t_m.m_mach); 327 } 328 329 /* 330 * Determine the resolution of the present frame pointer and the 331 * new input relocatable objects frame pointer. 332 */ 333 if ((ofl->ofl_ocapset.oc_sf_1.cm_val & FP_FLAGS) == FP_FLAGS) { 334 /* 335 * If the new relocatable object isn't using a frame pointer, 336 * reduce the present state to unused. 337 */ 338 if ((val & FP_FLAGS) != FP_FLAGS) 339 ofl->ofl_ocapset.oc_sf_1.cm_val &= ~SF1_SUNW_FPUSED; 340 341 /* 342 * Having processed the frame pointer bits, remove them from 343 * the value so they don't get OR'd in below. 344 */ 345 val &= ~FP_FLAGS; 346 347 } else if ((ofl->ofl_ocapset.oc_sf_1.cm_val & SF1_SUNW_FPKNWN) == 0) { 348 /* 349 * If the present frame pointer state is unknown, mask it out 350 * and allow the values from the new relocatable object 351 * to overwrite them. 352 */ 353 ofl->ofl_ocapset.oc_sf_1.cm_val &= ~FP_FLAGS; 354 } else { 355 /* Do not take the frame pointer flags from the object */ 356 val &= ~FP_FLAGS; 357 } 358 359 ofl->ofl_ocapset.oc_sf_1.cm_val |= val; 360 361 DBG_CALL(Dbg_cap_val_entry(ofl->ofl_lml, DBG_STATE_RESOLVED, 362 CA_SUNW_SF_1, ofl->ofl_ocapset.oc_sf_1.cm_val, ld_targ.t_m.m_mach)); 363 364 #undef FP_FLAGS 365 } 366 367 /* 368 * Determine the hardware capabilities of the object being built from the 369 * capabilities of the input relocatable objects. There's really little to 370 * do here, other than to offer diagnostics, hardware capabilities are simply 371 * additive. 372 */ 373 static void 374 hw_cap(Ofl_desc *ofl, Xword tag, Xword val) 375 { 376 elfcap_mask_t *hwcap; 377 ofl_flag_t flags1; 378 379 if (tag == CA_SUNW_HW_1) { 380 hwcap = &ofl->ofl_ocapset.oc_hw_1.cm_val; 381 flags1 = FLG_OF1_OVHWCAP1; 382 } else { 383 hwcap = &ofl->ofl_ocapset.oc_hw_2.cm_val; 384 flags1 = FLG_OF1_OVHWCAP2; 385 } 386 387 /* 388 * If a mapfile has established definitions to override any object 389 * capabilities, ignore any new object capabilities. 390 */ 391 if (ofl->ofl_flags1 & flags1) { 392 DBG_CALL(Dbg_cap_val_entry(ofl->ofl_lml, DBG_STATE_IGNORED, 393 tag, val, ld_targ.t_m.m_mach)); 394 return; 395 } 396 397 /* 398 * If this object doesn't specify any capabilities, ignore it, and 399 * leave the state as is. 400 */ 401 if (val == 0) 402 return; 403 404 if (DBG_ENABLED) { 405 Dbg_cap_val_entry(ofl->ofl_lml, DBG_STATE_CURRENT, CA_SUNW_HW_1, 406 ofl->ofl_ocapset.oc_hw_1.cm_val, ld_targ.t_m.m_mach); 407 Dbg_cap_val_entry(ofl->ofl_lml, DBG_STATE_NEW, CA_SUNW_HW_1, 408 val, ld_targ.t_m.m_mach); 409 } 410 411 *hwcap |= val; 412 413 DBG_CALL(Dbg_cap_val_entry(ofl->ofl_lml, DBG_STATE_RESOLVED, tag, 414 *hwcap, ld_targ.t_m.m_mach)); 415 } 416 417 /* 418 * Promote a machine capability or platform capability to the output file. 419 * Multiple instances of these names can be defined. 420 */ 421 static void 422 str_cap(Ofl_desc *ofl, char *pstr, ofl_flag_t flags, Xword tag, Caplist *list) 423 { 424 Capstr *capstr; 425 Aliste idx; 426 Boolean found = FALSE; 427 428 /* 429 * If a mapfile has established definitions to override this capability, 430 * ignore any new capability. 431 */ 432 if (ofl->ofl_flags1 & flags) { 433 DBG_CALL(Dbg_cap_ptr_entry(ofl->ofl_lml, DBG_STATE_IGNORED, 434 tag, pstr)); 435 return; 436 } 437 438 for (ALIST_TRAVERSE(list->cl_val, idx, capstr)) { 439 DBG_CALL(Dbg_cap_ptr_entry(ofl->ofl_lml, 440 DBG_STATE_CURRENT, tag, capstr->cs_str)); 441 if (strcmp(capstr->cs_str, pstr) == 0) 442 found = TRUE; 443 } 444 445 DBG_CALL(Dbg_cap_ptr_entry(ofl->ofl_lml, DBG_STATE_NEW, tag, pstr)); 446 447 if (found == FALSE) { 448 if ((capstr = alist_append(&list->cl_val, NULL, 449 sizeof (Capstr), AL_CNT_CAP_NAMES)) == NULL) { 450 ofl->ofl_flags |= FLG_OF_FATAL; 451 return; 452 } 453 capstr->cs_str = pstr; 454 } 455 456 if (DBG_ENABLED) { 457 for (ALIST_TRAVERSE(list->cl_val, idx, capstr)) { 458 DBG_CALL(Dbg_cap_ptr_entry(ofl->ofl_lml, 459 DBG_STATE_RESOLVED, tag, capstr->cs_str)); 460 } 461 } 462 } 463 464 /* 465 * Promote a capability identifier to the output file. A capability group can 466 * only have one identifier, and thus only the first identifier seen from any 467 * input relocatable objects is retained. An explicit user defined identifier, 468 * rather than an an identifier fabricated by ld(1) with -z symbcap processing, 469 * takes precedence. Note, a user may have defined an identifier via a mapfile, 470 * in which case the mapfile identifier is retained. 471 */ 472 static void 473 id_cap(Ofl_desc *ofl, char *pstr, oc_flag_t flags) 474 { 475 Objcapset *ocapset = &ofl->ofl_ocapset; 476 477 if (ocapset->oc_id.cs_str) { 478 DBG_CALL(Dbg_cap_ptr_entry(ofl->ofl_lml, DBG_STATE_CURRENT, 479 CA_SUNW_ID, ocapset->oc_id.cs_str)); 480 481 if ((ocapset->oc_flags & FLG_OCS_USRDEFID) || 482 ((flags & FLG_OCS_USRDEFID) == 0)) { 483 DBG_CALL(Dbg_cap_ptr_entry(ofl->ofl_lml, 484 DBG_STATE_IGNORED, CA_SUNW_ID, pstr)); 485 return; 486 } 487 } 488 489 DBG_CALL(Dbg_cap_ptr_entry(ofl->ofl_lml, DBG_STATE_NEW, 490 CA_SUNW_ID, pstr)); 491 492 ocapset->oc_id.cs_str = pstr; 493 ocapset->oc_flags |= flags; 494 495 DBG_CALL(Dbg_cap_ptr_entry(ofl->ofl_lml, DBG_STATE_RESOLVED, 496 CA_SUNW_ID, pstr)); 497 } 498 499 /* 500 * Promote a capabilities group to the object capabilities. This catches a 501 * corner case. An object capabilities file can be converted to symbol 502 * capabilities with -z symbolcap. However, if the user has indicated that all 503 * the symbols should be demoted, we'd be left with a symbol capabilities file, 504 * with no associated symbols. Catch this case by promoting the symbol 505 * capabilities back to object capabilities. 506 */ 507 void 508 ld_cap_move_symtoobj(Ofl_desc *ofl) 509 { 510 Cap_group *cgp; 511 Aliste idx1; 512 513 for (APLIST_TRAVERSE(ofl->ofl_capgroups, idx1, cgp)) { 514 Objcapset *scapset = &cgp->cg_set; 515 Capstr *capstr; 516 Aliste idx2; 517 518 if (scapset->oc_id.cs_str) { 519 if (scapset->oc_flags & FLG_OCS_USRDEFID) 520 id_cap(ofl, scapset->oc_id.cs_str, 521 scapset->oc_flags); 522 } 523 if (scapset->oc_plat.cl_val) { 524 for (ALIST_TRAVERSE(scapset->oc_plat.cl_val, idx2, 525 capstr)) { 526 str_cap(ofl, capstr->cs_str, FLG_OF1_OVPLATCAP, 527 CA_SUNW_PLAT, &ofl->ofl_ocapset.oc_plat); 528 } 529 } 530 if (scapset->oc_mach.cl_val) { 531 for (ALIST_TRAVERSE(scapset->oc_mach.cl_val, idx2, 532 capstr)) { 533 str_cap(ofl, capstr->cs_str, FLG_OF1_OVMACHCAP, 534 CA_SUNW_MACH, &ofl->ofl_ocapset.oc_mach); 535 } 536 } 537 if (scapset->oc_hw_2.cm_val) 538 hw_cap(ofl, CA_SUNW_HW_2, scapset->oc_hw_2.cm_val); 539 540 if (scapset->oc_hw_1.cm_val) 541 hw_cap(ofl, CA_SUNW_HW_1, scapset->oc_hw_1.cm_val); 542 543 if (scapset->oc_sf_1.cm_val) 544 sf1_cap(ofl, scapset->oc_sf_1.cm_val, NULL, NULL); 545 } 546 } 547 548 /* 549 * Determine whether a capabilities group already exists that describes this 550 * new capabilities group. 551 * 552 * Note, a capability group identifier, CA_SUNW_ID, isn't used as part of the 553 * comparison. This attribute simply assigns a diagnostic name to the group, 554 * and in the case of multiple identifiers, the first will be taken. 555 */ 556 static Cap_group * 557 get_cap_group(Objcapset *ocapset, Word cnum, Ofl_desc *ofl, Is_desc *isp) 558 { 559 Aliste idx; 560 Cap_group *cgp; 561 Word ccnum = cnum; 562 563 /* 564 * If the new capabilities contains a CA_SUNW_ID, drop the count of the 565 * number of comparable items. 566 */ 567 if (ocapset->oc_id.cs_str) 568 ccnum--; 569 570 /* 571 * Traverse the existing symbols capabilities groups. 572 */ 573 for (APLIST_TRAVERSE(ofl->ofl_capgroups, idx, cgp)) { 574 Word onum = cgp->cg_num; 575 Alist *calp, *oalp; 576 577 if (cgp->cg_set.oc_id.cs_str) 578 onum--; 579 580 if (onum != ccnum) 581 continue; 582 583 if (cgp->cg_set.oc_hw_1.cm_val != ocapset->oc_hw_1.cm_val) 584 continue; 585 if (cgp->cg_set.oc_sf_1.cm_val != ocapset->oc_sf_1.cm_val) 586 continue; 587 if (cgp->cg_set.oc_hw_2.cm_val != ocapset->oc_hw_2.cm_val) 588 continue; 589 590 calp = cgp->cg_set.oc_plat.cl_val; 591 oalp = ocapset->oc_plat.cl_val; 592 if ((calp == NULL) && oalp) 593 continue; 594 if (calp && ((oalp == NULL) || cap_names_match(calp, oalp))) 595 continue; 596 597 calp = cgp->cg_set.oc_mach.cl_val; 598 oalp = ocapset->oc_mach.cl_val; 599 if ((calp == NULL) && oalp) 600 continue; 601 if (calp && ((oalp == NULL) || cap_names_match(calp, oalp))) 602 continue; 603 604 /* 605 * If a matching group is found, then this new group has 606 * already been supplied by a previous file, and hence the 607 * existing group can be used. Record this new input section, 608 * from which we can also derive the input file name, on the 609 * existing groups input sections. 610 */ 611 if (aplist_append(&(cgp->cg_secs), isp, 612 AL_CNT_CAP_SECS) == NULL) 613 return (NULL); 614 return (cgp); 615 } 616 617 /* 618 * If a capabilities group is not found, create a new one. 619 */ 620 if (((cgp = libld_calloc(sizeof (Cap_group), 1)) == NULL) || 621 (aplist_append(&(ofl->ofl_capgroups), cgp, 622 AL_CNT_CAP_DESCS) == NULL)) 623 return (NULL); 624 625 /* 626 * If we're converting object capabilities to symbol capabilities and 627 * no CA_SUNW_ID is defined, fabricate one. This identifier is appended 628 * to all symbol names that are converted into capabilities symbols, 629 * see ld_sym_process(). 630 */ 631 if ((isp->is_file->ifl_flags & FLG_IF_OTOSCAP) && 632 (ocapset->oc_id.cs_str == NULL)) { 633 size_t len; 634 635 /* 636 * Create an identifier using the group number together with a 637 * default template. We allocate a buffer large enough for any 638 * possible number of items (way more than we need). 639 */ 640 len = MSG_STR_CAPGROUPID_SIZE + CONV_INV_BUFSIZE; 641 if ((ocapset->oc_id.cs_str = libld_malloc(len)) == NULL) 642 return (NULL); 643 644 (void) snprintf(ocapset->oc_id.cs_str, len, 645 MSG_ORIG(MSG_STR_CAPGROUPID), 646 aplist_nitems(ofl->ofl_capgroups)); 647 cnum++; 648 } 649 650 cgp->cg_set = *ocapset; 651 cgp->cg_num = cnum; 652 653 /* 654 * Null the callers alist's as they've effectively been transferred 655 * to this new Cap_group. 656 */ 657 ocapset->oc_plat.cl_val = ocapset->oc_mach.cl_val = NULL; 658 659 /* 660 * Keep track of which input section, and hence input file, established 661 * this group. 662 */ 663 if (aplist_append(&(cgp->cg_secs), isp, AL_CNT_CAP_SECS) == NULL) 664 return (NULL); 665 666 /* 667 * Keep track of the number of symbol capabilities entries that will be 668 * required in the output file. Each group requires a terminating 669 * CA_SUNW_NULL. 670 */ 671 ofl->ofl_capsymcnt += (cnum + 1); 672 return (cgp); 673 } 674 675 /* 676 * Capture symbol capability family information. This data structure is focal 677 * in maintaining all symbol capability relationships, and provides for the 678 * eventual creation of a capabilities information section, and possibly a 679 * capabilities chain section. 680 * 681 * Capabilities families are lead by a CAPINFO_SUNW_GLOB symbol. This symbol 682 * provides the visible global symbol that is referenced by all external 683 * callers. This symbol may have aliases. For example, a weak/global symbol 684 * pair, such as memcpy()/_memcpy() may lead the same capabilities family. 685 * Each family contains one or more local symbol members. These members provide 686 * the capabilities specific functions, and are associated to a capabilities 687 * group. For example, the capability members memcpy%sun4u and memcpy%sun4v 688 * might be associated with the memcpy() capability family. 689 * 690 * This routine is called when a relocatable object that provides object 691 * capabilities is transformed into a symbol capabilities object, using the 692 * -z symbolcap option. 693 * 694 * This routine is also called to collect the SUNW_capinfo section information 695 * of a relocatable object that contains symbol capability definitions. 696 */ 697 uintptr_t 698 ld_cap_add_family(Ofl_desc *ofl, Sym_desc *lsdp, Sym_desc *csdp, Cap_group *cgp, 699 APlist **csyms) 700 { 701 Cap_avlnode qcav, *cav; 702 avl_tree_t *avlt; 703 avl_index_t where = 0; 704 Cap_sym *mcsp; 705 Aliste idx; 706 707 /* 708 * Make sure the capability families have an initialized AVL tree. 709 */ 710 if ((avlt = ofl->ofl_capfamilies) == NULL) { 711 if ((avlt = libld_calloc(sizeof (avl_tree_t), 1)) == NULL) 712 return (S_ERROR); 713 avl_create(avlt, &ld_sym_avl_comp, sizeof (Cap_avlnode), 714 SGSOFFSETOF(Cap_avlnode, cn_symavlnode.sav_node)); 715 ofl->ofl_capfamilies = avlt; 716 717 /* 718 * When creating a dynamic object, capability family members 719 * are maintained in a .SUNW_capchain, the first entry of 720 * which is the version number of the chain. 721 */ 722 ofl->ofl_capchaincnt = 1; 723 } 724 725 /* 726 * Determine whether a family already exists, and if not, create one 727 * using the lead family symbol. 728 */ 729 qcav.cn_symavlnode.sav_hash = (Word)elf_hash(lsdp->sd_name); 730 qcav.cn_symavlnode.sav_name = lsdp->sd_name; 731 732 if ((cav = avl_find(avlt, &qcav, &where)) == NULL) { 733 if ((cav = libld_calloc(sizeof (Cap_avlnode), 1)) == NULL) 734 return (S_ERROR); 735 cav->cn_symavlnode.sav_hash = qcav.cn_symavlnode.sav_hash; 736 cav->cn_symavlnode.sav_name = qcav.cn_symavlnode.sav_name; 737 cav->cn_symavlnode.sav_sdp = lsdp; 738 739 avl_insert(avlt, cav, where); 740 741 /* 742 * When creating a dynamic object, capability family members 743 * are maintained in a .SUNW_capchain, each family starts with 744 * this lead symbol, and is terminated with a 0 element. 745 */ 746 ofl->ofl_capchaincnt += 2; 747 } 748 749 /* 750 * If no group information is provided then this request is to add a 751 * lead capability symbol, or lead symbol alias. If this is the lead 752 * symbol there's nothing more to do. Otherwise save the alias. 753 */ 754 if (cgp == NULL) { 755 if ((lsdp != csdp) && (aplist_append(&cav->cn_aliases, csdp, 756 AL_CNT_CAP_ALIASES) == NULL)) 757 return (S_ERROR); 758 759 return (0); 760 } 761 762 /* 763 * Determine whether a member of the same group as this new member is 764 * already defined within this family. If so, we have a multiply 765 * defined symbol. 766 */ 767 for (APLIST_TRAVERSE(cav->cn_members, idx, mcsp)) { 768 Sym_desc *msdp; 769 770 if (cgp != mcsp->cs_group) 771 continue; 772 773 /* 774 * Diagnose that a multiple symbol definition exists. 775 */ 776 msdp = mcsp->cs_sdp; 777 778 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_CAP_MULDEF), 779 demangle(lsdp->sd_name)); 780 eprintf(ofl->ofl_lml, ERR_NONE, MSG_INTL(MSG_CAP_MULDEFSYMS), 781 msdp->sd_file->ifl_name, msdp->sd_name, 782 csdp->sd_file->ifl_name, csdp->sd_name); 783 ofl->ofl_flags |= FLG_OF_FATAL; 784 } 785 786 /* 787 * Add this capabilities symbol member to the family. 788 */ 789 if (((mcsp = libld_malloc(sizeof (Cap_sym))) == NULL) || 790 (aplist_append(&cav->cn_members, mcsp, AL_CNT_CAP_MEMS) == NULL)) 791 return (S_ERROR); 792 793 mcsp->cs_sdp = csdp; 794 mcsp->cs_group = cgp; 795 796 /* 797 * When creating a dynamic object, capability family members are 798 * maintained in a .SUNW_capchain. Account for this family member. 799 */ 800 ofl->ofl_capchaincnt++; 801 802 /* 803 * If this input file is undergoing object capabilities to symbol 804 * capabilities conversion, then this member is a new local symbol 805 * that has been generated from an original global symbol. Keep track 806 * of this symbol so that the output file symbol table can be populated 807 * with these new symbol entries. 808 */ 809 if (csyms && (aplist_append(csyms, mcsp, AL_CNT_CAP_SYMS) == NULL)) 810 return (S_ERROR); 811 812 return (0); 813 } 814 815 /* 816 * Process a SHT_SUNW_cap capabilities section. 817 */ 818 static uintptr_t 819 process_cap(Ofl_desc *ofl, Ifl_desc *ifl, Is_desc *cisp) 820 { 821 Objcapset ocapset = { 0 }; 822 Cap_desc *cdp; 823 Cap *data, *cdata; 824 char *strs; 825 Word ndx, cnum; 826 int objcapndx, descapndx, symcapndx; 827 int nulls, capstrs = 0; 828 829 /* 830 * Determine the capabilities data and size. 831 */ 832 cdata = (Cap *)cisp->is_indata->d_buf; 833 cnum = (Word)(cisp->is_shdr->sh_size / cisp->is_shdr->sh_entsize); 834 835 if ((cdata == NULL) || (cnum == 0)) 836 return (0); 837 838 DBG_CALL(Dbg_cap_sec_title(ofl->ofl_lml, ifl->ifl_name)); 839 840 /* 841 * Traverse the section to determine what capabilities groups are 842 * available. 843 * 844 * A capabilities section can contain one or more, CA_SUNW_NULL 845 * terminated groups. 846 * 847 * - The first group defines the object capabilities. 848 * - Additional groups define symbol capabilities. 849 * - Since the initial group is always reserved for object 850 * capabilities, any object with symbol capabilities must also 851 * have an object capabilities group. If the object has no object 852 * capabilities, an empty object group is defined, consisting of a 853 * CA_SUNW_NULL element in index [0]. 854 * - If any capabilities require references to a named string, then 855 * the section header sh_info points to the associated string 856 * table. 857 * - If an object contains symbol capability groups, then the 858 * section header sh_link points to the associated capinfo table. 859 */ 860 objcapndx = 0; 861 descapndx = symcapndx = -1; 862 nulls = 0; 863 864 for (ndx = 0, data = cdata; ndx < cnum; ndx++, data++) { 865 switch (data->c_tag) { 866 case CA_SUNW_NULL: 867 /* 868 * If this is the first CA_SUNW_NULL entry, and no 869 * capabilities group has been found, then this object 870 * does not define any object capabilities. 871 */ 872 if (nulls++ == 0) { 873 if (ndx == 0) 874 objcapndx = -1; 875 } else if ((symcapndx == -1) && (descapndx != -1)) 876 symcapndx = descapndx; 877 878 break; 879 880 case CA_SUNW_PLAT: 881 case CA_SUNW_MACH: 882 case CA_SUNW_ID: 883 capstrs++; 884 /* FALLTHROUGH */ 885 886 case CA_SUNW_HW_1: 887 case CA_SUNW_SF_1: 888 case CA_SUNW_HW_2: 889 /* 890 * If this is the start of a new group, save it. 891 */ 892 if (descapndx == -1) 893 descapndx = ndx; 894 break; 895 896 default: 897 eprintf(ofl->ofl_lml, ERR_WARNING, 898 MSG_INTL(MSG_FIL_UNKCAP), ifl->ifl_name, 899 EC_WORD(cisp->is_scnndx), cisp->is_name, 900 data->c_tag); 901 } 902 } 903 904 /* 905 * If a string capabilities entry has been found, the capabilities 906 * section must reference the associated string table. 907 */ 908 if (capstrs) { 909 Word info = cisp->is_shdr->sh_info; 910 911 if ((info == 0) || (info > ifl->ifl_shnum)) { 912 eprintf(ofl->ofl_lml, ERR_FATAL, 913 MSG_INTL(MSG_FIL_INVSHINFO), ifl->ifl_name, 914 EC_WORD(cisp->is_scnndx), cisp->is_name, 915 EC_XWORD(info)); 916 ofl->ofl_flags |= FLG_OF_FATAL; 917 return (S_ERROR); 918 } 919 strs = (char *)ifl->ifl_isdesc[info]->is_indata->d_buf; 920 } 921 922 /* 923 * The processing of capabilities groups is as follows: 924 * 925 * - if a relocatable object provides only object capabilities, and 926 * the -z symbolcap option is in effect, then the object 927 * capabilities are transformed into symbol capabilities and the 928 * symbol capabilities are carried over to the output file. 929 * - in all other cases, any capabilities present in an input 930 * relocatable object are carried from the input object to the 931 * output without any transformation or conversion. 932 * 933 * Capture any object capabilities that are to be carried over to the 934 * output file. 935 */ 936 if ((objcapndx == 0) && 937 ((symcapndx != -1) || ((ofl->ofl_flags & FLG_OF_OTOSCAP) == 0))) { 938 for (ndx = 0, data = cdata; ndx < cnum; ndx++, data++) { 939 /* 940 * Object capabilities end at the first null. 941 */ 942 if (data->c_tag == CA_SUNW_NULL) 943 break; 944 945 /* 946 * Only the object software capabilities that are 947 * defined in a relocatable object become part of the 948 * object software capabilities in the output file. 949 * However, check the validity of any object software 950 * capabilities of any dependencies. 951 */ 952 if (data->c_tag == CA_SUNW_SF_1) { 953 sf1_cap(ofl, data->c_un.c_val, ifl, cisp); 954 continue; 955 } 956 957 /* 958 * The remaining capability types must come from a 959 * relocatable object in order to contribute to the 960 * output. 961 */ 962 if (ifl->ifl_ehdr->e_type != ET_REL) 963 continue; 964 965 switch (data->c_tag) { 966 case CA_SUNW_HW_1: 967 case CA_SUNW_HW_2: 968 hw_cap(ofl, data->c_tag, data->c_un.c_val); 969 break; 970 971 case CA_SUNW_PLAT: 972 str_cap(ofl, strs + data->c_un.c_ptr, 973 FLG_OF1_OVPLATCAP, CA_SUNW_PLAT, 974 &ofl->ofl_ocapset.oc_plat); 975 break; 976 977 case CA_SUNW_MACH: 978 str_cap(ofl, strs + data->c_un.c_ptr, 979 FLG_OF1_OVMACHCAP, CA_SUNW_MACH, 980 &ofl->ofl_ocapset.oc_mach); 981 break; 982 983 case CA_SUNW_ID: 984 id_cap(ofl, strs + data->c_un.c_ptr, 985 FLG_OCS_USRDEFID); 986 break; 987 988 default: 989 assert(0); /* Unknown capability type */ 990 } 991 } 992 993 /* 994 * If there are no symbol capabilities, or this objects 995 * capabilities aren't being transformed into a symbol 996 * capabilities, then we're done. 997 */ 998 if ((symcapndx == -1) && 999 ((ofl->ofl_flags & FLG_OF_OTOSCAP) == 0)) 1000 return (1); 1001 } 1002 1003 /* 1004 * If these capabilities don't originate from a relocatable object 1005 * there's no further processing required. 1006 */ 1007 if (ifl->ifl_ehdr->e_type != ET_REL) 1008 return (1); 1009 1010 /* 1011 * If this object only defines an object capabilities group, and the 1012 * -z symbolcap option is in effect, then all global function symbols 1013 * and initialized global data symbols are renamed and assigned to the 1014 * transformed symbol capabilities group. 1015 */ 1016 if ((objcapndx == 0) && 1017 (symcapndx == -1) && (ofl->ofl_flags & FLG_OF_OTOSCAP)) 1018 ifl->ifl_flags |= FLG_IF_OTOSCAP; 1019 1020 /* 1021 * Allocate a capabilities descriptor to collect the capabilities data 1022 * for this input file. Allocate a mirror of the raw capabilities data 1023 * that points to the individual symbol capabilities groups. An APlist 1024 * is used, although it will be sparsely populated, as the list provides 1025 * a convenient mechanism for traversal later. 1026 */ 1027 if (((cdp = libld_calloc(sizeof (Cap_desc), 1)) == NULL) || 1028 (aplist_append(&(cdp->ca_groups), NULL, cnum) == NULL)) 1029 return (S_ERROR); 1030 1031 /* 1032 * Clear the allocated APlist data array, and assign the number of 1033 * items as the total number of array items. 1034 */ 1035 (void) memset(&cdp->ca_groups->apl_data[0], 0, 1036 (cnum * sizeof (void *))); 1037 cdp->ca_groups->apl_nitems = cnum; 1038 1039 ifl->ifl_caps = cdp; 1040 1041 /* 1042 * Traverse the capabilities data, unpacking the data into a 1043 * capabilities set. Process each capabilities set as a unique group. 1044 */ 1045 descapndx = -1; 1046 nulls = 0; 1047 1048 for (ndx = 0, data = cdata; ndx < cnum; ndx++, data++) { 1049 Capstr *capstr; 1050 1051 switch (data->c_tag) { 1052 case CA_SUNW_NULL: 1053 nulls++; 1054 1055 /* 1056 * Process the capabilities group that this null entry 1057 * terminates. The capabilities group that is returned 1058 * will either point to this file's data, or to a 1059 * matching capabilities group that has already been 1060 * processed. 1061 * 1062 * Note, if this object defines object capabilities, 1063 * the first group descriptor points to these object 1064 * capabilities. It is only necessary to save this 1065 * descriptor when object capabilities are being 1066 * transformed into symbol capabilities (-z symbolcap). 1067 */ 1068 if (descapndx != -1) { 1069 if ((nulls > 1) || 1070 (ifl->ifl_flags & FLG_IF_OTOSCAP)) { 1071 APlist *alp = cdp->ca_groups; 1072 1073 if ((alp->apl_data[descapndx] = 1074 get_cap_group(&ocapset, 1075 (ndx - descapndx), ofl, 1076 cisp)) == NULL) 1077 return (S_ERROR); 1078 } 1079 1080 /* 1081 * Clean up the capabilities data in preparation 1082 * for processing additional groups. If the 1083 * collected capabilities strings were used to 1084 * establish a new output group, they will have 1085 * been saved in get_cap_group(). If these 1086 * descriptors still exist, then an existing 1087 * descriptor has been used to associate with 1088 * this file, and these string descriptors can 1089 * be freed. 1090 */ 1091 ocapset.oc_hw_1.cm_val = 1092 ocapset.oc_sf_1.cm_val = 1093 ocapset.oc_hw_2.cm_val = 0; 1094 if (ocapset.oc_plat.cl_val) { 1095 free((void *)ocapset.oc_plat.cl_val); 1096 ocapset.oc_plat.cl_val = NULL; 1097 } 1098 if (ocapset.oc_mach.cl_val) { 1099 free((void *)ocapset.oc_mach.cl_val); 1100 ocapset.oc_mach.cl_val = NULL; 1101 } 1102 descapndx = -1; 1103 } 1104 continue; 1105 1106 case CA_SUNW_HW_1: 1107 ocapset.oc_hw_1.cm_val = data->c_un.c_val; 1108 DBG_CALL(Dbg_cap_val_entry(ofl->ofl_lml, 1109 DBG_STATE_ORIGINAL, CA_SUNW_HW_1, 1110 ocapset.oc_hw_1.cm_val, ld_targ.t_m.m_mach)); 1111 break; 1112 1113 case CA_SUNW_SF_1: 1114 ocapset.oc_sf_1.cm_val = data->c_un.c_val; 1115 DBG_CALL(Dbg_cap_val_entry(ofl->ofl_lml, 1116 DBG_STATE_ORIGINAL, CA_SUNW_SF_1, 1117 ocapset.oc_sf_1.cm_val, ld_targ.t_m.m_mach)); 1118 break; 1119 1120 case CA_SUNW_HW_2: 1121 ocapset.oc_hw_2.cm_val = data->c_un.c_val; 1122 DBG_CALL(Dbg_cap_val_entry(ofl->ofl_lml, 1123 DBG_STATE_ORIGINAL, CA_SUNW_HW_2, 1124 ocapset.oc_hw_2.cm_val, ld_targ.t_m.m_mach)); 1125 break; 1126 1127 case CA_SUNW_PLAT: 1128 if ((capstr = alist_append(&ocapset.oc_plat.cl_val, 1129 NULL, sizeof (Capstr), AL_CNT_CAP_NAMES)) == NULL) 1130 return (S_ERROR); 1131 capstr->cs_str = strs + data->c_un.c_ptr; 1132 DBG_CALL(Dbg_cap_ptr_entry(ofl->ofl_lml, 1133 DBG_STATE_ORIGINAL, CA_SUNW_PLAT, capstr->cs_str)); 1134 break; 1135 1136 case CA_SUNW_MACH: 1137 if ((capstr = alist_append(&ocapset.oc_mach.cl_val, 1138 NULL, sizeof (Capstr), AL_CNT_CAP_NAMES)) == NULL) 1139 return (S_ERROR); 1140 capstr->cs_str = strs + data->c_un.c_ptr; 1141 DBG_CALL(Dbg_cap_ptr_entry(ofl->ofl_lml, 1142 DBG_STATE_ORIGINAL, CA_SUNW_MACH, capstr->cs_str)); 1143 break; 1144 1145 case CA_SUNW_ID: 1146 ocapset.oc_id.cs_str = strs + data->c_un.c_ptr; 1147 DBG_CALL(Dbg_cap_ptr_entry(ofl->ofl_lml, 1148 DBG_STATE_ORIGINAL, CA_SUNW_ID, 1149 ocapset.oc_id.cs_str)); 1150 break; 1151 } 1152 1153 /* 1154 * Save the start of this new group. 1155 */ 1156 if (descapndx == -1) 1157 descapndx = ndx; 1158 } 1159 return (1); 1160 } 1161 1162 /* 1163 * Capture any symbol capabilities symbols. An object file that contains symbol 1164 * capabilities has an associated .SUNW_capinfo section. This section 1165 * identifies which symbols are associated to which capabilities, together with 1166 * their associated lead symbol. Each of these symbol pairs are recorded for 1167 * processing later. 1168 */ 1169 static uintptr_t 1170 process_capinfo(Ofl_desc *ofl, Ifl_desc *ifl, Is_desc *isp) 1171 { 1172 Cap_desc *cdp = ifl->ifl_caps; 1173 Capinfo *capinfo = isp->is_indata->d_buf; 1174 Shdr *shdr = isp->is_shdr; 1175 Word cndx, capinfonum; 1176 1177 capinfonum = (Word)(shdr->sh_size / shdr->sh_entsize); 1178 1179 if ((cdp == NULL) || (capinfo == NULL) || (capinfonum == 0)) 1180 return (0); 1181 1182 for (cndx = 1, capinfo++; cndx < capinfonum; cndx++, capinfo++) { 1183 Sym_desc *sdp, *lsdp; 1184 Word lndx; 1185 uchar_t gndx; 1186 1187 if ((gndx = (uchar_t)ELF_C_GROUP(*capinfo)) == 0) 1188 continue; 1189 lndx = (Word)ELF_C_SYM(*capinfo); 1190 1191 /* 1192 * Catch any anomalies. A capabilities symbol should be valid, 1193 * and the capabilities lead symbol should also be global. 1194 * Note, ld(1) -z symbolcap would create local capabilities 1195 * symbols, but we don't enforce this so as to give the 1196 * compilation environment a little more freedom. 1197 */ 1198 if ((sdp = ifl->ifl_oldndx[cndx]) == NULL) { 1199 eprintf(ofl->ofl_lml, ERR_WARNING, 1200 MSG_INTL(MSG_CAPINFO_INVALSYM), ifl->ifl_name, 1201 EC_WORD(isp->is_scnndx), isp->is_name, cndx, 1202 MSG_INTL(MSG_STR_UNKNOWN)); 1203 continue; 1204 } 1205 if ((lndx == 0) || (lndx >= ifl->ifl_symscnt) || 1206 ((lsdp = ifl->ifl_oldndx[lndx]) == NULL) || 1207 (ELF_ST_BIND(lsdp->sd_sym->st_info) != STB_GLOBAL)) { 1208 eprintf(ofl->ofl_lml, ERR_WARNING, 1209 MSG_INTL(MSG_CAPINFO_INVALLEAD), ifl->ifl_name, 1210 EC_WORD(isp->is_scnndx), isp->is_name, cndx, lsdp ? 1211 demangle(lsdp->sd_name) : MSG_INTL(MSG_STR_UNKNOWN), 1212 lndx); 1213 continue; 1214 } 1215 1216 /* 1217 * Indicate that this is a capabilities symbol. 1218 */ 1219 sdp->sd_flags |= FLG_SY_CAP; 1220 1221 /* 1222 * Save any global capability symbols. Global capability 1223 * symbols are identified with a CAPINFO_SUNW_GLOB group id. 1224 * The lead symbol for this global capability symbol is either 1225 * the symbol itself, or an alias. 1226 */ 1227 if (gndx == CAPINFO_SUNW_GLOB) { 1228 if (ld_cap_add_family(ofl, lsdp, sdp, 1229 NULL, NULL) == S_ERROR) 1230 return (S_ERROR); 1231 continue; 1232 } 1233 1234 /* 1235 * Track the number of non-global capabilities symbols, as these 1236 * are used to size any symbol tables. If we're generating a 1237 * dynamic object, this symbol will be added to the dynamic 1238 * symbol table, therefore ensure there is space in the dynamic 1239 * string table. 1240 */ 1241 ofl->ofl_caploclcnt++; 1242 if (((ofl->ofl_flags & FLG_OF_RELOBJ) == 0) && 1243 (st_insert(ofl->ofl_dynstrtab, sdp->sd_name) == -1)) 1244 return (S_ERROR); 1245 1246 /* 1247 * As we're tracking this local symbol as a capabilities symbol, 1248 * reduce the local symbol count to compensate. 1249 */ 1250 ofl->ofl_locscnt--; 1251 1252 /* 1253 * Determine whether the associated lead symbol indicates 1254 * NODYNSORT. If so, remove this local entry from the 1255 * SUNW_dynsort section too. NODYNSORT tagging can only be 1256 * obtained from a mapfile symbol definition, and thus any 1257 * global definition that has this tagging has already been 1258 * instantiated and this instance resolved to it. 1259 */ 1260 if (lsdp->sd_flags & FLG_SY_NODYNSORT) { 1261 Sym *lsym = lsdp->sd_sym; 1262 uchar_t ltype = ELF_ST_TYPE(lsym->st_info); 1263 1264 DYNSORT_COUNT(lsdp, lsym, ltype, --); 1265 lsdp->sd_flags |= FLG_SY_NODYNSORT; 1266 } 1267 1268 /* 1269 * Track this family member, together with its associated group. 1270 */ 1271 if (ld_cap_add_family(ofl, lsdp, sdp, 1272 cdp->ca_groups->apl_data[gndx], NULL) == S_ERROR) 1273 return (S_ERROR); 1274 } 1275 1276 return (0); 1277 } 1278 1279 /* 1280 * Simply process the section so that we have pointers to the data for use 1281 * in later routines, however don't add the section to the output section 1282 * list as we will be creating our own replacement sections later (ie. 1283 * symtab and relocation). 1284 */ 1285 static uintptr_t 1286 /* ARGSUSED5 */ 1287 process_input(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 1288 Word ndx, int ident, Ofl_desc *ofl) 1289 { 1290 return (process_section(name, ifl, shdr, scn, ndx, 1291 ld_targ.t_id.id_null, ofl)); 1292 } 1293 1294 /* 1295 * Keep a running count of relocation entries from input relocatable objects for 1296 * sizing relocation buckets later. If we're building an executable, save any 1297 * relocations from shared objects to determine if any copy relocation symbol 1298 * has a displacement relocation against it. 1299 */ 1300 static uintptr_t 1301 /* ARGSUSED5 */ 1302 process_reloc(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 1303 Word ndx, int ident, Ofl_desc *ofl) 1304 { 1305 if (process_section(name, ifl, 1306 shdr, scn, ndx, ld_targ.t_id.id_null, ofl) == S_ERROR) 1307 return (S_ERROR); 1308 1309 if (ifl->ifl_ehdr->e_type == ET_REL) { 1310 if (shdr->sh_entsize && (shdr->sh_entsize <= shdr->sh_size)) 1311 /* LINTED */ 1312 ofl->ofl_relocincnt += 1313 (Word)(shdr->sh_size / shdr->sh_entsize); 1314 } else if (ofl->ofl_flags & FLG_OF_EXEC) { 1315 if (aplist_append(&ifl->ifl_relsect, ifl->ifl_isdesc[ndx], 1316 AL_CNT_IFL_RELSECS) == NULL) 1317 return (S_ERROR); 1318 } 1319 return (1); 1320 } 1321 1322 /* 1323 * Process a string table section. A valid section contains an initial and 1324 * final null byte. 1325 */ 1326 static uintptr_t 1327 process_strtab(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 1328 Word ndx, int ident, Ofl_desc *ofl) 1329 { 1330 char *data; 1331 size_t size; 1332 Is_desc *isp; 1333 uintptr_t error; 1334 1335 /* 1336 * Never include .stab.excl sections in any output file. 1337 * If the -s flag has been specified strip any .stab sections. 1338 */ 1339 if (((ofl->ofl_flags & FLG_OF_STRIP) && ident && 1340 (strncmp(name, MSG_ORIG(MSG_SCN_STAB), MSG_SCN_STAB_SIZE) == 0)) || 1341 (strcmp(name, MSG_ORIG(MSG_SCN_STABEXCL)) == 0) && ident) 1342 return (1); 1343 1344 /* 1345 * If we got here to process a .shstrtab or .dynstr table, `ident' will 1346 * be null. Otherwise make sure we don't have a .strtab section as this 1347 * should not be added to the output section list either. 1348 */ 1349 if ((ident != ld_targ.t_id.id_null) && 1350 (strcmp(name, MSG_ORIG(MSG_SCN_STRTAB)) == 0)) 1351 ident = ld_targ.t_id.id_null; 1352 1353 error = process_section(name, ifl, shdr, scn, ndx, ident, ofl); 1354 if ((error == 0) || (error == S_ERROR)) 1355 return (error); 1356 1357 /* 1358 * String tables should start and end with a NULL byte. Note, it has 1359 * been known for the assembler to create empty string tables, so check 1360 * the size before attempting to verify the data itself. 1361 */ 1362 isp = ifl->ifl_isdesc[ndx]; 1363 size = isp->is_indata->d_size; 1364 if (size) { 1365 data = isp->is_indata->d_buf; 1366 if (data[0] != '\0' || data[size - 1] != '\0') 1367 eprintf(ofl->ofl_lml, ERR_WARNING, 1368 MSG_INTL(MSG_FIL_MALSTR), ifl->ifl_name, 1369 EC_WORD(isp->is_scnndx), name); 1370 } else 1371 isp->is_indata->d_buf = (void *)MSG_ORIG(MSG_STR_EMPTY); 1372 1373 ifl->ifl_flags |= FLG_IF_HSTRTAB; 1374 return (1); 1375 } 1376 1377 /* 1378 * Invalid sections produce a warning and are skipped. 1379 */ 1380 static uintptr_t 1381 /* ARGSUSED3 */ 1382 invalid_section(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 1383 Word ndx, int ident, Ofl_desc *ofl) 1384 { 1385 Conv_inv_buf_t inv_buf; 1386 1387 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_FIL_INVALSEC), 1388 ifl->ifl_name, EC_WORD(ndx), name, 1389 conv_sec_type(ifl->ifl_ehdr->e_ident[EI_OSABI], 1390 ifl->ifl_ehdr->e_machine, shdr->sh_type, 0, &inv_buf)); 1391 return (1); 1392 } 1393 1394 /* 1395 * Compare an input section name to a given string, taking the ELF '%' 1396 * section naming convention into account. If an input section name 1397 * contains a '%' character, the '%' and all following characters are 1398 * ignored in the comparison. 1399 * 1400 * entry: 1401 * is_name - Name of input section 1402 * match_name - Name to compare to 1403 * match_len - strlen(match_name) 1404 * 1405 * exit: 1406 * Returns True (1) if the names match, and False (0) otherwise. 1407 */ 1408 inline static int 1409 is_name_cmp(const char *is_name, const char *match_name, size_t match_len) 1410 { 1411 /* 1412 * If the start of is_name is not a match for name, 1413 * the match fails. 1414 */ 1415 if (strncmp(is_name, match_name, match_len) != 0) 1416 return (0); 1417 1418 /* 1419 * The prefix matched. The next character must be either '%', or 1420 * NULL, in order for a match to be true. 1421 */ 1422 is_name += match_len; 1423 return ((*is_name == '\0') || (*is_name == '%')); 1424 } 1425 1426 /* 1427 * Helper routine for process_progbits() to process allocable sections. 1428 * 1429 * entry: 1430 * name, ifl, shdr, ndx, ident, ofl - As passed to process_progbits(). 1431 * is_stab_index - TRUE if section is .index. 1432 * is_flags - Additional flags to be added to the input section. 1433 * 1434 * exit: 1435 * The allocable section has been processed. *ident and *is_flags 1436 * are updated as necessary to reflect the changes. Returns TRUE 1437 * for success, FALSE for failure. 1438 */ 1439 inline static Boolean 1440 process_progbits_alloc(const char *name, Ifl_desc *ifl, Shdr *shdr, 1441 Word ndx, int *ident, Ofl_desc *ofl, Boolean is_stab_index, 1442 Word *is_flags) 1443 { 1444 Boolean done = FALSE; 1445 1446 if (name[0] == '.') { 1447 Conv_inv_buf_t inv_buf1, inv_buf2; 1448 1449 switch (name[1]) { 1450 case 'e': 1451 if (!is_name_cmp(name, MSG_ORIG(MSG_SCN_EHFRAME), 1452 MSG_SCN_EHFRAME_SIZE)) 1453 break; 1454 1455 *ident = ld_targ.t_id.id_unwind; 1456 *is_flags |= FLG_IS_EHFRAME; 1457 done = TRUE; 1458 1459 /* 1460 * Only accept a progbits .eh_frame on a platform 1461 * for which this is the expected type. 1462 */ 1463 if (ld_targ.t_m.m_sht_unwind == SHT_PROGBITS) 1464 break; 1465 eprintf(ofl->ofl_lml, ERR_FATAL, 1466 MSG_INTL(MSG_FIL_EXEHFRMTYP), ifl->ifl_name, 1467 EC_WORD(ndx), name, 1468 conv_sec_type(ifl->ifl_ehdr->e_ident[EI_OSABI], 1469 ifl->ifl_ehdr->e_machine, shdr->sh_type, 1470 CONV_FMT_ALT_CF, &inv_buf1), 1471 conv_sec_type(ifl->ifl_ehdr->e_ident[EI_OSABI], 1472 ifl->ifl_ehdr->e_machine, ld_targ.t_m.m_sht_unwind, 1473 CONV_FMT_ALT_CF, &inv_buf2)); 1474 ofl->ofl_flags |= FLG_OF_FATAL; 1475 return (FALSE); 1476 case 'g': 1477 if (is_name_cmp(name, MSG_ORIG(MSG_SCN_GOT), 1478 MSG_SCN_GOT_SIZE)) { 1479 *ident = ld_targ.t_id.id_null; 1480 done = TRUE; 1481 break; 1482 } 1483 if ((ld_targ.t_m.m_sht_unwind == SHT_PROGBITS) && 1484 is_name_cmp(name, MSG_ORIG(MSG_SCN_GCC_X_TBL), 1485 MSG_SCN_GCC_X_TBL_SIZE)) { 1486 *ident = ld_targ.t_id.id_unwind; 1487 done = TRUE; 1488 break; 1489 } 1490 break; 1491 case 'p': 1492 if (is_name_cmp(name, MSG_ORIG(MSG_SCN_PLT), 1493 MSG_SCN_PLT_SIZE)) { 1494 *ident = ld_targ.t_id.id_null; 1495 done = TRUE; 1496 } 1497 break; 1498 } 1499 } 1500 if (!done) { 1501 if (is_stab_index) { 1502 /* 1503 * This is a work-around for x86 compilers that have 1504 * set SHF_ALLOC for the .stab.index section. 1505 * 1506 * Because of this, make sure that the .stab.index 1507 * does not end up as the last section in the text 1508 * segment. Older linkers can produce segmentation 1509 * violations when they strip (ld -s) against a 1510 * shared object whose last section in the text 1511 * segment is a .stab. 1512 */ 1513 *ident = ld_targ.t_id.id_interp; 1514 } else { 1515 *ident = ld_targ.t_id.id_data; 1516 } 1517 } 1518 1519 return (TRUE); 1520 } 1521 1522 /* 1523 * Process a progbits section. 1524 */ 1525 static uintptr_t 1526 process_progbits(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 1527 Word ndx, int ident, Ofl_desc *ofl) 1528 { 1529 Boolean is_stab_index = FALSE; 1530 Word is_flags = 0; 1531 uintptr_t r; 1532 1533 /* 1534 * Never include .stab.excl sections in any output file. 1535 * If the -s flag has been specified strip any .stab sections. 1536 */ 1537 if (ident && (strncmp(name, MSG_ORIG(MSG_SCN_STAB), 1538 MSG_SCN_STAB_SIZE) == 0)) { 1539 if ((ofl->ofl_flags & FLG_OF_STRIP) || 1540 (strcmp((name + MSG_SCN_STAB_SIZE), 1541 MSG_ORIG(MSG_SCN_EXCL)) == 0)) 1542 return (1); 1543 1544 if (strcmp((name + MSG_SCN_STAB_SIZE), 1545 MSG_ORIG(MSG_SCN_INDEX)) == 0) 1546 is_stab_index = TRUE; 1547 } 1548 1549 if ((ofl->ofl_flags & FLG_OF_STRIP) && ident) { 1550 if ((strncmp(name, MSG_ORIG(MSG_SCN_DEBUG), 1551 MSG_SCN_DEBUG_SIZE) == 0) || 1552 (strcmp(name, MSG_ORIG(MSG_SCN_LINE)) == 0)) 1553 return (1); 1554 } 1555 1556 /* 1557 * Update the ident to reflect the type of section we've got. 1558 * 1559 * If there is any .plt or .got section to generate we'll be creating 1560 * our own version, so don't allow any input sections of these types to 1561 * be added to the output section list (why a relocatable object would 1562 * have a .plt or .got is a mystery, but stranger things have occurred). 1563 * 1564 * If there are any unwind sections, and this is a platform that uses 1565 * SHT_PROGBITS for unwind sections, then set their ident to reflect 1566 * that. 1567 */ 1568 if (ident) { 1569 if (shdr->sh_flags & SHF_TLS) { 1570 ident = ld_targ.t_id.id_tls; 1571 } else if ((shdr->sh_flags & ~ALL_SHF_IGNORE) == 1572 (SHF_ALLOC | SHF_EXECINSTR)) { 1573 ident = ld_targ.t_id.id_text; 1574 } else if (shdr->sh_flags & SHF_ALLOC) { 1575 if (process_progbits_alloc(name, ifl, shdr, ndx, 1576 &ident, ofl, is_stab_index, &is_flags) == FALSE) 1577 return (S_ERROR); 1578 } else { 1579 ident = ld_targ.t_id.id_note; 1580 } 1581 } 1582 1583 r = process_section(name, ifl, shdr, scn, ndx, ident, ofl); 1584 1585 /* 1586 * On success, process_section() creates an input section descriptor. 1587 * Now that it exists, we can add any pending input section flags. 1588 */ 1589 if ((is_flags != 0) && (r == 1)) 1590 ifl->ifl_isdesc[ndx]->is_flags |= is_flags; 1591 1592 return (r); 1593 } 1594 1595 /* 1596 * Handles the SHT_SUNW_{DEBUG,DEBUGSTR) sections. 1597 */ 1598 static uintptr_t 1599 process_debug(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 1600 Word ndx, int ident, Ofl_desc *ofl) 1601 { 1602 /* 1603 * Debug information is discarded when the 'ld -s' flag is invoked. 1604 */ 1605 if (ofl->ofl_flags & FLG_OF_STRIP) { 1606 return (1); 1607 } 1608 return (process_progbits(name, ifl, shdr, scn, ndx, ident, ofl)); 1609 } 1610 1611 /* 1612 * Process a nobits section. 1613 */ 1614 static uintptr_t 1615 process_nobits(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 1616 Word ndx, int ident, Ofl_desc *ofl) 1617 { 1618 if (ident) { 1619 if (shdr->sh_flags & SHF_TLS) 1620 ident = ld_targ.t_id.id_tlsbss; 1621 #if defined(_ELF64) 1622 else if ((shdr->sh_flags & SHF_AMD64_LARGE) && 1623 (ld_targ.t_m.m_mach == EM_AMD64)) 1624 ident = ld_targ.t_id.id_lbss; 1625 #endif 1626 else 1627 ident = ld_targ.t_id.id_bss; 1628 } 1629 return (process_section(name, ifl, shdr, scn, ndx, ident, ofl)); 1630 } 1631 1632 /* 1633 * Process a SHT_*_ARRAY section. 1634 */ 1635 static uintptr_t 1636 process_array(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 1637 Word ndx, int ident, Ofl_desc *ofl) 1638 { 1639 uintptr_t error; 1640 1641 if (ident) 1642 ident = ld_targ.t_id.id_array; 1643 1644 error = process_section(name, ifl, shdr, scn, ndx, ident, ofl); 1645 if ((error == 0) || (error == S_ERROR)) 1646 return (error); 1647 1648 return (1); 1649 } 1650 1651 static uintptr_t 1652 /* ARGSUSED1 */ 1653 array_process(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 1654 { 1655 Os_desc *osp; 1656 Shdr *shdr; 1657 1658 if ((isc == NULL) || ((osp = isc->is_osdesc) == NULL)) 1659 return (0); 1660 1661 shdr = isc->is_shdr; 1662 1663 if ((shdr->sh_type == SHT_FINI_ARRAY) && 1664 (ofl->ofl_osfiniarray == NULL)) 1665 ofl->ofl_osfiniarray = osp; 1666 else if ((shdr->sh_type == SHT_INIT_ARRAY) && 1667 (ofl->ofl_osinitarray == NULL)) 1668 ofl->ofl_osinitarray = osp; 1669 else if ((shdr->sh_type == SHT_PREINIT_ARRAY) && 1670 (ofl->ofl_ospreinitarray == NULL)) 1671 ofl->ofl_ospreinitarray = osp; 1672 1673 return (1); 1674 } 1675 1676 /* 1677 * Process a SHT_SYMTAB_SHNDX section. 1678 */ 1679 static uintptr_t 1680 process_sym_shndx(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 1681 Word ndx, int ident, Ofl_desc *ofl) 1682 { 1683 if (process_input(name, ifl, shdr, scn, ndx, ident, ofl) == S_ERROR) 1684 return (S_ERROR); 1685 1686 /* 1687 * Have we already seen the related SYMTAB - if so verify it now. 1688 */ 1689 if (shdr->sh_link < ndx) { 1690 Is_desc *isp = ifl->ifl_isdesc[shdr->sh_link]; 1691 1692 if ((isp == NULL) || ((isp->is_shdr->sh_type != SHT_SYMTAB) && 1693 (isp->is_shdr->sh_type != SHT_DYNSYM))) { 1694 eprintf(ofl->ofl_lml, ERR_FATAL, 1695 MSG_INTL(MSG_FIL_INVSHLINK), ifl->ifl_name, 1696 EC_WORD(ndx), name, EC_XWORD(shdr->sh_link)); 1697 return (S_ERROR); 1698 } 1699 isp->is_symshndx = ifl->ifl_isdesc[ndx]; 1700 } 1701 return (1); 1702 } 1703 1704 /* 1705 * Final processing for SHT_SYMTAB_SHNDX section. 1706 */ 1707 static uintptr_t 1708 /* ARGSUSED2 */ 1709 sym_shndx_process(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 1710 { 1711 if (isc->is_shdr->sh_link > isc->is_scnndx) { 1712 Is_desc *isp = ifl->ifl_isdesc[isc->is_shdr->sh_link]; 1713 1714 if ((isp == NULL) || ((isp->is_shdr->sh_type != SHT_SYMTAB) && 1715 (isp->is_shdr->sh_type != SHT_DYNSYM))) { 1716 eprintf(ofl->ofl_lml, ERR_FATAL, 1717 MSG_INTL(MSG_FIL_INVSHLINK), isc->is_file->ifl_name, 1718 EC_WORD(isc->is_scnndx), isc->is_name, 1719 EC_XWORD(isc->is_shdr->sh_link)); 1720 return (S_ERROR); 1721 } 1722 isp->is_symshndx = isc; 1723 } 1724 return (1); 1725 } 1726 1727 /* 1728 * Process .dynamic section from a relocatable object. 1729 * 1730 * Note: That the .dynamic section is only considered interesting when 1731 * dlopen()ing a relocatable object (thus FLG_OF1_RELDYN can only get 1732 * set when libld is called from ld.so.1). 1733 */ 1734 /*ARGSUSED*/ 1735 static uintptr_t 1736 process_rel_dynamic(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 1737 Word ndx, int ident, Ofl_desc *ofl) 1738 { 1739 Dyn *dyn; 1740 Elf_Scn *strscn; 1741 Elf_Data *dp; 1742 char *str; 1743 1744 /* 1745 * Process .dynamic sections from relocatable objects ? 1746 */ 1747 if ((ofl->ofl_flags1 & FLG_OF1_RELDYN) == 0) 1748 return (1); 1749 1750 /* 1751 * Find the string section associated with the .dynamic section. 1752 */ 1753 if ((strscn = elf_getscn(ifl->ifl_elf, shdr->sh_link)) == NULL) { 1754 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_GETSCN), 1755 ifl->ifl_name); 1756 ofl->ofl_flags |= FLG_OF_FATAL; 1757 return (0); 1758 } 1759 dp = elf_getdata(strscn, NULL); 1760 str = (char *)dp->d_buf; 1761 1762 /* 1763 * And get the .dynamic data 1764 */ 1765 dp = elf_getdata(scn, NULL); 1766 1767 for (dyn = (Dyn *)dp->d_buf; dyn->d_tag != DT_NULL; dyn++) { 1768 Ifl_desc *difl; 1769 1770 switch (dyn->d_tag) { 1771 case DT_NEEDED: 1772 case DT_USED: 1773 if (((difl = libld_calloc(1, 1774 sizeof (Ifl_desc))) == NULL) || 1775 (aplist_append(&ofl->ofl_sos, difl, 1776 AL_CNT_OFL_LIBS) == NULL)) 1777 return (S_ERROR); 1778 1779 difl->ifl_name = MSG_ORIG(MSG_STR_DYNAMIC); 1780 difl->ifl_soname = str + (size_t)dyn->d_un.d_val; 1781 difl->ifl_flags = FLG_IF_NEEDSTR; 1782 break; 1783 case DT_RPATH: 1784 case DT_RUNPATH: 1785 if ((ofl->ofl_rpath = add_string(ofl->ofl_rpath, 1786 (str + (size_t)dyn->d_un.d_val))) == 1787 (const char *)S_ERROR) 1788 return (S_ERROR); 1789 break; 1790 case DT_VERSYM: 1791 /* 1792 * The Solaris ld does not put DT_VERSYM in the 1793 * dynamic section. If the object has DT_VERSYM, 1794 * then it must have been produced by the GNU ld, 1795 * and is using the GNU style of versioning. 1796 */ 1797 ifl->ifl_flags |= FLG_IF_GNUVER; 1798 break; 1799 } 1800 } 1801 return (1); 1802 } 1803 1804 /* 1805 * Expand implicit references. Dependencies can be specified in terms of the 1806 * $ORIGIN, $MACHINE, $PLATFORM, $OSREL and $OSNAME tokens, either from their 1807 * needed name, or via a runpath. In addition runpaths may also specify the 1808 * $ISALIST token. 1809 * 1810 * Probably the most common reference to explicit dependencies (via -L) will be 1811 * sufficient to find any associated implicit dependencies, but just in case we 1812 * expand any occurrence of these known tokens here. 1813 * 1814 * Note, if any errors occur we simply return the original name. 1815 * 1816 * This code is remarkably similar to expand() in rtld/common/paths.c. 1817 */ 1818 static char *machine = NULL; 1819 static size_t machine_sz = 0; 1820 static char *platform = NULL; 1821 static size_t platform_sz = 0; 1822 static Isa_desc *isa = NULL; 1823 static Uts_desc *uts = NULL; 1824 1825 static char * 1826 expand(const char *parent, const char *name, char **next) 1827 { 1828 char _name[PATH_MAX], *nptr, *_next; 1829 const char *optr; 1830 size_t nrem = PATH_MAX - 1; 1831 int expanded = 0, _expanded, isaflag = 0; 1832 1833 optr = name; 1834 nptr = _name; 1835 1836 while (*optr) { 1837 if (nrem == 0) 1838 return ((char *)name); 1839 1840 if (*optr != '$') { 1841 *nptr++ = *optr++, nrem--; 1842 continue; 1843 } 1844 1845 _expanded = 0; 1846 1847 if (strncmp(optr, MSG_ORIG(MSG_STR_ORIGIN), 1848 MSG_STR_ORIGIN_SIZE) == 0) { 1849 char *eptr; 1850 1851 /* 1852 * For $ORIGIN, expansion is really just a concatenation 1853 * of the parents directory name. For example, an 1854 * explicit dependency foo/bar/lib1.so with a dependency 1855 * on $ORIGIN/lib2.so would be expanded to 1856 * foo/bar/lib2.so. 1857 */ 1858 if ((eptr = strrchr(parent, '/')) == NULL) { 1859 *nptr++ = '.'; 1860 nrem--; 1861 } else { 1862 size_t len = eptr - parent; 1863 1864 if (len >= nrem) 1865 return ((char *)name); 1866 1867 (void) strncpy(nptr, parent, len); 1868 nptr = nptr + len; 1869 nrem -= len; 1870 } 1871 optr += MSG_STR_ORIGIN_SIZE; 1872 expanded = _expanded = 1; 1873 1874 } else if (strncmp(optr, MSG_ORIG(MSG_STR_MACHINE), 1875 MSG_STR_MACHINE_SIZE) == 0) { 1876 /* 1877 * Establish the machine from sysconf - like uname -i. 1878 */ 1879 if ((machine == NULL) && (machine_sz == 0)) { 1880 char info[SYS_NMLN]; 1881 long size; 1882 1883 size = sysinfo(SI_MACHINE, info, SYS_NMLN); 1884 if ((size != -1) && 1885 (machine = libld_malloc((size_t)size))) { 1886 (void) strcpy(machine, info); 1887 machine_sz = (size_t)size - 1; 1888 } else 1889 machine_sz = 1; 1890 } 1891 if (machine) { 1892 if (machine_sz >= nrem) 1893 return ((char *)name); 1894 1895 (void) strncpy(nptr, machine, machine_sz); 1896 nptr = nptr + machine_sz; 1897 nrem -= machine_sz; 1898 1899 optr += MSG_STR_MACHINE_SIZE; 1900 expanded = _expanded = 1; 1901 } 1902 1903 } else if (strncmp(optr, MSG_ORIG(MSG_STR_PLATFORM), 1904 MSG_STR_PLATFORM_SIZE) == 0) { 1905 /* 1906 * Establish the platform from sysconf - like uname -i. 1907 */ 1908 if ((platform == NULL) && (platform_sz == 0)) { 1909 char info[SYS_NMLN]; 1910 long size; 1911 1912 size = sysinfo(SI_PLATFORM, info, SYS_NMLN); 1913 if ((size != -1) && 1914 (platform = libld_malloc((size_t)size))) { 1915 (void) strcpy(platform, info); 1916 platform_sz = (size_t)size - 1; 1917 } else 1918 platform_sz = 1; 1919 } 1920 if (platform) { 1921 if (platform_sz >= nrem) 1922 return ((char *)name); 1923 1924 (void) strncpy(nptr, platform, platform_sz); 1925 nptr = nptr + platform_sz; 1926 nrem -= platform_sz; 1927 1928 optr += MSG_STR_PLATFORM_SIZE; 1929 expanded = _expanded = 1; 1930 } 1931 1932 } else if (strncmp(optr, MSG_ORIG(MSG_STR_OSNAME), 1933 MSG_STR_OSNAME_SIZE) == 0) { 1934 /* 1935 * Establish the os name - like uname -s. 1936 */ 1937 if (uts == NULL) 1938 uts = conv_uts(); 1939 1940 if (uts && uts->uts_osnamesz) { 1941 if (uts->uts_osnamesz >= nrem) 1942 return ((char *)name); 1943 1944 (void) strncpy(nptr, uts->uts_osname, 1945 uts->uts_osnamesz); 1946 nptr = nptr + uts->uts_osnamesz; 1947 nrem -= uts->uts_osnamesz; 1948 1949 optr += MSG_STR_OSNAME_SIZE; 1950 expanded = _expanded = 1; 1951 } 1952 1953 } else if (strncmp(optr, MSG_ORIG(MSG_STR_OSREL), 1954 MSG_STR_OSREL_SIZE) == 0) { 1955 /* 1956 * Establish the os release - like uname -r. 1957 */ 1958 if (uts == NULL) 1959 uts = conv_uts(); 1960 1961 if (uts && uts->uts_osrelsz) { 1962 if (uts->uts_osrelsz >= nrem) 1963 return ((char *)name); 1964 1965 (void) strncpy(nptr, uts->uts_osrel, 1966 uts->uts_osrelsz); 1967 nptr = nptr + uts->uts_osrelsz; 1968 nrem -= uts->uts_osrelsz; 1969 1970 optr += MSG_STR_OSREL_SIZE; 1971 expanded = _expanded = 1; 1972 } 1973 1974 } else if ((strncmp(optr, MSG_ORIG(MSG_STR_ISALIST), 1975 MSG_STR_ISALIST_SIZE) == 0) && next && (isaflag++ == 0)) { 1976 /* 1977 * Establish instruction sets from sysconf. Note that 1978 * this is only meaningful from runpaths. 1979 */ 1980 if (isa == NULL) 1981 isa = conv_isalist(); 1982 1983 if (isa && isa->isa_listsz && 1984 (nrem > isa->isa_opt->isa_namesz)) { 1985 size_t mlen, tlen, hlen = optr - name; 1986 size_t no; 1987 char *lptr; 1988 Isa_opt *opt = isa->isa_opt; 1989 1990 (void) strncpy(nptr, opt->isa_name, 1991 opt->isa_namesz); 1992 nptr = nptr + opt->isa_namesz; 1993 nrem -= opt->isa_namesz; 1994 1995 optr += MSG_STR_ISALIST_SIZE; 1996 expanded = _expanded = 1; 1997 1998 tlen = strlen(optr); 1999 2000 /* 2001 * As ISALIST expands to a number of elements, 2002 * establish a new list to return to the caller. 2003 * This will contain the present path being 2004 * processed redefined for each isalist option, 2005 * plus the original remaining list entries. 2006 */ 2007 mlen = ((hlen + tlen) * (isa->isa_optno - 1)) + 2008 isa->isa_listsz - opt->isa_namesz; 2009 if (*next) 2010 mlen += strlen(*next); 2011 if ((_next = lptr = libld_malloc(mlen)) == NULL) 2012 return (0); 2013 2014 for (no = 1, opt++; no < isa->isa_optno; 2015 no++, opt++) { 2016 (void) strncpy(lptr, name, hlen); 2017 lptr = lptr + hlen; 2018 (void) strncpy(lptr, opt->isa_name, 2019 opt->isa_namesz); 2020 lptr = lptr + opt->isa_namesz; 2021 (void) strncpy(lptr, optr, tlen); 2022 lptr = lptr + tlen; 2023 *lptr++ = ':'; 2024 } 2025 if (*next) 2026 (void) strcpy(lptr, *next); 2027 else 2028 *--lptr = '\0'; 2029 } 2030 } 2031 2032 /* 2033 * If no expansion occurred skip the $ and continue. 2034 */ 2035 if (_expanded == 0) 2036 *nptr++ = *optr++, nrem--; 2037 } 2038 2039 /* 2040 * If any ISALIST processing has occurred not only do we return the 2041 * expanded node we're presently working on, but we must also update the 2042 * remaining list so that it is effectively prepended with this node 2043 * expanded to all remaining isalist options. Note that we can only 2044 * handle one ISALIST per node. For more than one ISALIST to be 2045 * processed we'd need a better algorithm than above to replace the 2046 * newly generated list. Whether we want to encourage the number of 2047 * pathname permutations this would provide is another question. So, for 2048 * now if more than one ISALIST is encountered we return the original 2049 * node untouched. 2050 */ 2051 if (isaflag) { 2052 if (isaflag == 1) 2053 *next = _next; 2054 else 2055 return ((char *)name); 2056 } 2057 2058 *nptr = '\0'; 2059 2060 if (expanded) { 2061 if ((nptr = libld_malloc(strlen(_name) + 1)) == NULL) 2062 return ((char *)name); 2063 (void) strcpy(nptr, _name); 2064 return (nptr); 2065 } 2066 return ((char *)name); 2067 } 2068 2069 /* 2070 * The Solaris ld does not put DT_VERSYM in the dynamic section, but the 2071 * GNU ld does, and it is used by the runtime linker to implement their 2072 * versioning scheme. Use this fact to determine if the sharable object 2073 * was produced by the GNU ld rather than the Solaris one, and to set 2074 * FLG_IF_GNUVER if so. This needs to be done before the symbols are 2075 * processed, since the answer determines whether we interpret the 2076 * symbols versions according to Solaris or GNU rules. 2077 */ 2078 /*ARGSUSED*/ 2079 static uintptr_t 2080 process_dynamic_isgnu(const char *name, Ifl_desc *ifl, Shdr *shdr, 2081 Elf_Scn *scn, Word ndx, int ident, Ofl_desc *ofl) 2082 { 2083 Dyn *dyn; 2084 Elf_Data *dp; 2085 uintptr_t error; 2086 2087 error = process_section(name, ifl, shdr, scn, ndx, ident, ofl); 2088 if ((error == 0) || (error == S_ERROR)) 2089 return (error); 2090 2091 /* Get the .dynamic data */ 2092 dp = elf_getdata(scn, NULL); 2093 2094 for (dyn = (Dyn *)dp->d_buf; dyn->d_tag != DT_NULL; dyn++) { 2095 if (dyn->d_tag == DT_VERSYM) { 2096 ifl->ifl_flags |= FLG_IF_GNUVER; 2097 break; 2098 } 2099 } 2100 return (1); 2101 } 2102 2103 /* 2104 * Process a dynamic section. If we are processing an explicit shared object 2105 * then we need to determine if it has a recorded SONAME, if so, this name will 2106 * be recorded in the output file being generated as the NEEDED entry rather 2107 * than the shared objects filename itself. 2108 * If the mode of the link-edit indicates that no undefined symbols should 2109 * remain, then we also need to build up a list of any additional shared object 2110 * dependencies this object may have. In this case save any NEEDED entries 2111 * together with any associated run-path specifications. This information is 2112 * recorded on the `ofl_soneed' list and will be analyzed after all explicit 2113 * file processing has been completed (refer finish_libs()). 2114 */ 2115 static uintptr_t 2116 process_dynamic(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 2117 { 2118 Dyn *data, *dyn; 2119 char *str, *rpath = NULL; 2120 const char *soname, *needed; 2121 2122 data = (Dyn *)isc->is_indata->d_buf; 2123 str = (char *)ifl->ifl_isdesc[isc->is_shdr->sh_link]->is_indata->d_buf; 2124 2125 /* 2126 * First loop through the dynamic section looking for a run path. 2127 */ 2128 if (ofl->ofl_flags & (FLG_OF_NOUNDEF | FLG_OF_SYMBOLIC)) { 2129 for (dyn = data; dyn->d_tag != DT_NULL; dyn++) { 2130 if ((dyn->d_tag != DT_RPATH) && 2131 (dyn->d_tag != DT_RUNPATH)) 2132 continue; 2133 if ((rpath = str + (size_t)dyn->d_un.d_val) == NULL) 2134 continue; 2135 break; 2136 } 2137 } 2138 2139 /* 2140 * Now look for any needed dependencies (which may use the rpath) 2141 * or a new SONAME. 2142 */ 2143 for (dyn = data; dyn->d_tag != DT_NULL; dyn++) { 2144 if (dyn->d_tag == DT_SONAME) { 2145 if ((soname = str + (size_t)dyn->d_un.d_val) == NULL) 2146 continue; 2147 2148 /* 2149 * Update the input file structure with this new name. 2150 */ 2151 ifl->ifl_soname = soname; 2152 2153 } else if ((dyn->d_tag == DT_NEEDED) || 2154 (dyn->d_tag == DT_USED)) { 2155 Sdf_desc *sdf; 2156 2157 if (!(ofl->ofl_flags & 2158 (FLG_OF_NOUNDEF | FLG_OF_SYMBOLIC))) 2159 continue; 2160 if ((needed = str + (size_t)dyn->d_un.d_val) == NULL) 2161 continue; 2162 2163 /* 2164 * Determine if this needed entry is already recorded on 2165 * the shared object needed list, if not create a new 2166 * definition for later processing (see finish_libs()). 2167 */ 2168 needed = expand(ifl->ifl_name, needed, NULL); 2169 2170 if ((sdf = sdf_find(needed, ofl->ofl_soneed)) == NULL) { 2171 if ((sdf = sdf_add(needed, 2172 &ofl->ofl_soneed)) == (Sdf_desc *)S_ERROR) 2173 return (S_ERROR); 2174 sdf->sdf_rfile = ifl->ifl_name; 2175 } 2176 2177 /* 2178 * Record the runpath (Note that we take the first 2179 * runpath which is exactly what ld.so.1 would do during 2180 * its dependency processing). 2181 */ 2182 if (rpath && (sdf->sdf_rpath == NULL)) 2183 sdf->sdf_rpath = rpath; 2184 2185 } else if (dyn->d_tag == DT_FLAGS_1) { 2186 if (dyn->d_un.d_val & (DF_1_INITFIRST | DF_1_INTERPOSE)) 2187 ifl->ifl_flags &= ~FLG_IF_LAZYLD; 2188 if (dyn->d_un.d_val & DF_1_DISPRELPND) 2189 ifl->ifl_flags |= FLG_IF_DISPPEND; 2190 if (dyn->d_un.d_val & DF_1_DISPRELDNE) 2191 ifl->ifl_flags |= FLG_IF_DISPDONE; 2192 if (dyn->d_un.d_val & DF_1_NODIRECT) 2193 ifl->ifl_flags |= FLG_IF_NODIRECT; 2194 2195 } else if ((dyn->d_tag == DT_AUDIT) && 2196 (ifl->ifl_flags & FLG_IF_NEEDED)) { 2197 /* 2198 * Record audit string as DT_DEPAUDIT. 2199 */ 2200 if ((ofl->ofl_depaudit = add_string(ofl->ofl_depaudit, 2201 (str + (size_t)dyn->d_un.d_val))) == 2202 (const char *)S_ERROR) 2203 return (S_ERROR); 2204 2205 } else if (dyn->d_tag == DT_SUNW_RTLDINF) { 2206 /* 2207 * If a library has the SUNW_RTLDINF .dynamic entry 2208 * then we must not permit lazyloading of this library. 2209 * This is because critical startup information (TLS 2210 * routines) are provided as part of these interfaces 2211 * and we must have them as part of process startup. 2212 */ 2213 ifl->ifl_flags &= ~FLG_IF_LAZYLD; 2214 } 2215 } 2216 2217 /* 2218 * Perform some SONAME sanity checks. 2219 */ 2220 if (ifl->ifl_flags & FLG_IF_NEEDED) { 2221 Ifl_desc *sifl; 2222 Aliste idx; 2223 2224 /* 2225 * Determine if anyone else will cause the same SONAME to be 2226 * used (this is either caused by two different files having the 2227 * same SONAME, or by one file SONAME actually matching another 2228 * file basename (if no SONAME is specified within a shared 2229 * library its basename will be used)). Probably rare, but some 2230 * idiot will do it. 2231 */ 2232 for (APLIST_TRAVERSE(ofl->ofl_sos, idx, sifl)) { 2233 if ((strcmp(ifl->ifl_soname, sifl->ifl_soname) == 0) && 2234 (ifl != sifl)) { 2235 const char *hint, *iflb, *siflb; 2236 2237 /* 2238 * Determine the basename of each file. Perhaps 2239 * there are multiple copies of the same file 2240 * being brought in using different -L search 2241 * paths, and if so give an extra hint in the 2242 * error message. 2243 */ 2244 iflb = strrchr(ifl->ifl_name, '/'); 2245 if (iflb == NULL) 2246 iflb = ifl->ifl_name; 2247 else 2248 iflb++; 2249 2250 siflb = strrchr(sifl->ifl_name, '/'); 2251 if (siflb == NULL) 2252 siflb = sifl->ifl_name; 2253 else 2254 siflb++; 2255 2256 if (strcmp(iflb, siflb) == 0) 2257 hint = MSG_INTL(MSG_REC_CNFLTHINT); 2258 else 2259 hint = MSG_ORIG(MSG_STR_EMPTY); 2260 2261 eprintf(ofl->ofl_lml, ERR_FATAL, 2262 MSG_INTL(MSG_REC_OBJCNFLT), sifl->ifl_name, 2263 ifl->ifl_name, sifl->ifl_soname, hint); 2264 ofl->ofl_flags |= FLG_OF_FATAL; 2265 return (0); 2266 } 2267 } 2268 2269 /* 2270 * If the SONAME is the same as the name the user wishes to 2271 * record when building a dynamic library (refer -h option), 2272 * we also have a name clash. 2273 */ 2274 if (ofl->ofl_soname && 2275 (strcmp(ofl->ofl_soname, ifl->ifl_soname) == 0)) { 2276 eprintf(ofl->ofl_lml, ERR_FATAL, 2277 MSG_INTL(MSG_REC_OPTCNFLT), ifl->ifl_name, 2278 MSG_INTL(MSG_MARG_SONAME), ifl->ifl_soname); 2279 ofl->ofl_flags |= FLG_OF_FATAL; 2280 return (0); 2281 } 2282 } 2283 return (1); 2284 } 2285 2286 /* 2287 * Process a progbits section from a relocatable object (ET_REL). 2288 * This is used on non-amd64 objects to recognize .eh_frame sections. 2289 */ 2290 /*ARGSUSED1*/ 2291 static uintptr_t 2292 process_progbits_final(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 2293 { 2294 if (isc->is_osdesc && (isc->is_flags & FLG_IS_EHFRAME) && 2295 (ld_unwind_register(isc->is_osdesc, ofl) == S_ERROR)) 2296 return (S_ERROR); 2297 2298 return (1); 2299 } 2300 2301 /* 2302 * Process a group section. 2303 */ 2304 static uintptr_t 2305 process_group(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 2306 Word ndx, int ident, Ofl_desc *ofl) 2307 { 2308 uintptr_t error; 2309 2310 error = process_section(name, ifl, shdr, scn, ndx, ident, ofl); 2311 if ((error == 0) || (error == S_ERROR)) 2312 return (error); 2313 2314 /* 2315 * Indicate that this input file has groups to process. Groups are 2316 * processed after all input sections have been processed. 2317 */ 2318 ifl->ifl_flags |= FLG_IS_GROUPS; 2319 2320 return (1); 2321 } 2322 2323 /* 2324 * Process a relocation entry. At this point all input sections from this 2325 * input file have been assigned an input section descriptor which is saved 2326 * in the `ifl_isdesc' array. 2327 */ 2328 static uintptr_t 2329 rel_process(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 2330 { 2331 Word rndx; 2332 Is_desc *risc; 2333 Os_desc *osp; 2334 Shdr *shdr = isc->is_shdr; 2335 Conv_inv_buf_t inv_buf; 2336 2337 /* 2338 * Make sure this is a valid relocation we can handle. 2339 */ 2340 if (shdr->sh_type != ld_targ.t_m.m_rel_sht_type) { 2341 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_FIL_INVALSEC), 2342 ifl->ifl_name, EC_WORD(isc->is_scnndx), isc->is_name, 2343 conv_sec_type(ifl->ifl_ehdr->e_ident[EI_OSABI], 2344 ifl->ifl_ehdr->e_machine, shdr->sh_type, 0, &inv_buf)); 2345 ofl->ofl_flags |= FLG_OF_FATAL; 2346 return (0); 2347 } 2348 2349 /* 2350 * From the relocation section header information determine which 2351 * section needs the actual relocation. Determine which output section 2352 * this input section has been assigned to and add to its relocation 2353 * list. Note that the relocation section may be null if it is not 2354 * required (ie. .debug, .stabs, etc). 2355 */ 2356 rndx = shdr->sh_info; 2357 if (rndx >= ifl->ifl_shnum) { 2358 /* 2359 * Broken input file. 2360 */ 2361 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_FIL_INVSHINFO), 2362 ifl->ifl_name, EC_WORD(isc->is_scnndx), isc->is_name, 2363 EC_XWORD(rndx)); 2364 ofl->ofl_flags |= FLG_OF_FATAL; 2365 return (0); 2366 } 2367 if (rndx == 0) { 2368 if (aplist_append(&ofl->ofl_extrarels, isc, 2369 AL_CNT_OFL_RELS) == NULL) 2370 return (S_ERROR); 2371 2372 } else if ((risc = ifl->ifl_isdesc[rndx]) != NULL) { 2373 /* 2374 * Discard relocations if they are against a section 2375 * which has been discarded. 2376 */ 2377 if (risc->is_flags & FLG_IS_DISCARD) 2378 return (1); 2379 2380 if ((osp = risc->is_osdesc) == NULL) { 2381 if (risc->is_shdr->sh_type == SHT_SUNW_move) { 2382 /* 2383 * This section is processed later in 2384 * process_movereloc(). 2385 */ 2386 if (aplist_append(&ofl->ofl_ismoverel, 2387 isc, AL_CNT_OFL_MOVE) == NULL) 2388 return (S_ERROR); 2389 return (1); 2390 } 2391 eprintf(ofl->ofl_lml, ERR_FATAL, 2392 MSG_INTL(MSG_FIL_INVRELOC1), ifl->ifl_name, 2393 EC_WORD(isc->is_scnndx), isc->is_name, 2394 EC_WORD(risc->is_scnndx), risc->is_name); 2395 return (0); 2396 } 2397 if (aplist_append(&osp->os_relisdescs, isc, 2398 AL_CNT_OS_RELISDESCS) == NULL) 2399 return (S_ERROR); 2400 } 2401 return (1); 2402 } 2403 2404 /* 2405 * SHF_EXCLUDE flags is set for this section. 2406 */ 2407 static uintptr_t 2408 process_exclude(const char *name, Ifl_desc *ifl, Shdr *shdr, Elf_Scn *scn, 2409 Word ndx, Ofl_desc *ofl) 2410 { 2411 /* 2412 * Sections SHT_SYMTAB and SHT_DYNDYM, even if SHF_EXCLUDE is on, might 2413 * be needed for ld processing. These sections need to be in the 2414 * internal table. Later it will be determined whether they can be 2415 * eliminated or not. 2416 */ 2417 if (shdr->sh_type == SHT_SYMTAB || shdr->sh_type == SHT_DYNSYM) 2418 return (0); 2419 2420 /* 2421 * Other checks 2422 */ 2423 if (shdr->sh_flags & SHF_ALLOC) { 2424 /* 2425 * A conflict, issue an warning message, and ignore the section. 2426 */ 2427 eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_FIL_EXCLUDE), 2428 ifl->ifl_name, EC_WORD(ndx), name); 2429 return (0); 2430 } 2431 2432 /* 2433 * This sections is not going to the output file. 2434 */ 2435 return (process_section(name, ifl, shdr, scn, ndx, 0, ofl)); 2436 } 2437 2438 /* 2439 * Section processing state table. `Initial' describes the required initial 2440 * procedure to be called (if any), `Final' describes the final processing 2441 * procedure (ie. things that can only be done when all required sections 2442 * have been collected). 2443 */ 2444 typedef uintptr_t (* initial_func_t)(const char *, Ifl_desc *, Shdr *, 2445 Elf_Scn *, Word, int, Ofl_desc *); 2446 2447 static initial_func_t Initial[SHT_NUM][2] = { 2448 /* ET_REL ET_DYN */ 2449 2450 /* SHT_NULL */ invalid_section, invalid_section, 2451 /* SHT_PROGBITS */ process_progbits, process_progbits, 2452 /* SHT_SYMTAB */ process_input, process_input, 2453 /* SHT_STRTAB */ process_strtab, process_strtab, 2454 /* SHT_RELA */ process_reloc, process_reloc, 2455 /* SHT_HASH */ invalid_section, NULL, 2456 /* SHT_DYNAMIC */ process_rel_dynamic, process_dynamic_isgnu, 2457 /* SHT_NOTE */ process_section, NULL, 2458 /* SHT_NOBITS */ process_nobits, process_nobits, 2459 /* SHT_REL */ process_reloc, process_reloc, 2460 /* SHT_SHLIB */ process_section, invalid_section, 2461 /* SHT_DYNSYM */ invalid_section, process_input, 2462 /* SHT_UNKNOWN12 */ process_progbits, process_progbits, 2463 /* SHT_UNKNOWN13 */ process_progbits, process_progbits, 2464 /* SHT_INIT_ARRAY */ process_array, NULL, 2465 /* SHT_FINI_ARRAY */ process_array, NULL, 2466 /* SHT_PREINIT_ARRAY */ process_array, NULL, 2467 /* SHT_GROUP */ process_group, invalid_section, 2468 /* SHT_SYMTAB_SHNDX */ process_sym_shndx, NULL 2469 }; 2470 2471 typedef uintptr_t (* final_func_t)(Is_desc *, Ifl_desc *, Ofl_desc *); 2472 2473 static final_func_t Final[SHT_NUM][2] = { 2474 /* ET_REL ET_DYN */ 2475 2476 /* SHT_NULL */ NULL, NULL, 2477 /* SHT_PROGBITS */ process_progbits_final, NULL, 2478 /* SHT_SYMTAB */ ld_sym_process, ld_sym_process, 2479 /* SHT_STRTAB */ NULL, NULL, 2480 /* SHT_RELA */ rel_process, NULL, 2481 /* SHT_HASH */ NULL, NULL, 2482 /* SHT_DYNAMIC */ NULL, process_dynamic, 2483 /* SHT_NOTE */ NULL, NULL, 2484 /* SHT_NOBITS */ NULL, NULL, 2485 /* SHT_REL */ rel_process, NULL, 2486 /* SHT_SHLIB */ NULL, NULL, 2487 /* SHT_DYNSYM */ NULL, ld_sym_process, 2488 /* SHT_UNKNOWN12 */ NULL, NULL, 2489 /* SHT_UNKNOWN13 */ NULL, NULL, 2490 /* SHT_INIT_ARRAY */ array_process, NULL, 2491 /* SHT_FINI_ARRAY */ array_process, NULL, 2492 /* SHT_PREINIT_ARRAY */ array_process, NULL, 2493 /* SHT_GROUP */ NULL, NULL, 2494 /* SHT_SYMTAB_SHNDX */ sym_shndx_process, NULL 2495 }; 2496 2497 #define MAXNDXSIZE 10 2498 2499 /* 2500 * Process an elf file. Each section is compared against the section state 2501 * table to determine whether it should be processed (saved), ignored, or 2502 * is invalid for the type of input file being processed. 2503 */ 2504 static uintptr_t 2505 process_elf(Ifl_desc *ifl, Elf *elf, Ofl_desc *ofl) 2506 { 2507 Elf_Scn *scn; 2508 Shdr *shdr; 2509 Word ndx, sndx, ordndx = 0, ordcnt = 0; 2510 char *str, *name; 2511 Word row, column; 2512 int ident; 2513 uintptr_t error; 2514 Is_desc *vdfisp, *vndisp, *vsyisp, *sifisp; 2515 Is_desc *capinfoisp, *capisp; 2516 Sdf_desc *sdf; 2517 Place_path_info path_info_buf, *path_info; 2518 2519 /* 2520 * Path information buffer used by ld_place_section() and related 2521 * routines. This information is used to evaluate entrance criteria 2522 * with non-empty file matching lists (ec_files). 2523 */ 2524 path_info = ld_place_path_info_init(ofl, ifl, &path_info_buf); 2525 2526 /* 2527 * First process the .shstrtab section so that later sections can 2528 * reference their name. 2529 */ 2530 ld_sup_file(ofl, ifl->ifl_name, elf_kind(elf), ifl->ifl_flags, elf); 2531 2532 sndx = ifl->ifl_shstrndx; 2533 if ((scn = elf_getscn(elf, (size_t)sndx)) == NULL) { 2534 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_GETSCN), 2535 ifl->ifl_name); 2536 ofl->ofl_flags |= FLG_OF_FATAL; 2537 return (0); 2538 } 2539 if ((shdr = elf_getshdr(scn)) == NULL) { 2540 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_GETSHDR), 2541 ifl->ifl_name); 2542 ofl->ofl_flags |= FLG_OF_FATAL; 2543 return (0); 2544 } 2545 if ((name = elf_strptr(elf, (size_t)sndx, (size_t)shdr->sh_name)) == 2546 NULL) { 2547 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_STRPTR), 2548 ifl->ifl_name); 2549 ofl->ofl_flags |= FLG_OF_FATAL; 2550 return (0); 2551 } 2552 2553 if (ld_sup_input_section(ofl, ifl, name, &shdr, sndx, scn, 2554 elf) == S_ERROR) 2555 return (S_ERROR); 2556 2557 /* 2558 * Reset the name since the shdr->sh_name could have been changed as 2559 * part of ld_sup_input_section(). 2560 */ 2561 if ((name = elf_strptr(elf, (size_t)sndx, (size_t)shdr->sh_name)) == 2562 NULL) { 2563 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_STRPTR), 2564 ifl->ifl_name); 2565 ofl->ofl_flags |= FLG_OF_FATAL; 2566 return (0); 2567 } 2568 2569 error = process_strtab(name, ifl, shdr, scn, sndx, FALSE, ofl); 2570 if ((error == 0) || (error == S_ERROR)) 2571 return (error); 2572 str = ifl->ifl_isdesc[sndx]->is_indata->d_buf; 2573 2574 /* 2575 * Determine the state table column from the input file type. Note, 2576 * shared library sections are not added to the output section list. 2577 */ 2578 if (ifl->ifl_ehdr->e_type == ET_DYN) { 2579 column = 1; 2580 ofl->ofl_soscnt++; 2581 ident = ld_targ.t_id.id_null; 2582 } else { 2583 column = 0; 2584 ofl->ofl_objscnt++; 2585 ident = ld_targ.t_id.id_unknown; 2586 } 2587 2588 DBG_CALL(Dbg_file_generic(ofl->ofl_lml, ifl)); 2589 ndx = 0; 2590 vdfisp = vndisp = vsyisp = sifisp = capinfoisp = capisp = NULL; 2591 scn = NULL; 2592 while (scn = elf_nextscn(elf, scn)) { 2593 ndx++; 2594 2595 /* 2596 * As we've already processed the .shstrtab don't do it again. 2597 */ 2598 if (ndx == sndx) 2599 continue; 2600 2601 if ((shdr = elf_getshdr(scn)) == NULL) { 2602 eprintf(ofl->ofl_lml, ERR_ELF, 2603 MSG_INTL(MSG_ELF_GETSHDR), ifl->ifl_name); 2604 ofl->ofl_flags |= FLG_OF_FATAL; 2605 return (0); 2606 } 2607 name = str + (size_t)(shdr->sh_name); 2608 2609 if (ld_sup_input_section(ofl, ifl, name, &shdr, ndx, scn, 2610 elf) == S_ERROR) 2611 return (S_ERROR); 2612 2613 /* 2614 * Reset the name since the shdr->sh_name could have been 2615 * changed as part of ld_sup_input_section(). 2616 */ 2617 name = str + (size_t)(shdr->sh_name); 2618 2619 row = shdr->sh_type; 2620 2621 /* 2622 * If the section has the SHF_EXCLUDE flag on, and we're not 2623 * generating a relocatable object, exclude the section. 2624 */ 2625 if (((shdr->sh_flags & SHF_EXCLUDE) != 0) && 2626 ((ofl->ofl_flags & FLG_OF_RELOBJ) == 0)) { 2627 if ((error = process_exclude(name, ifl, shdr, scn, 2628 ndx, ofl)) == S_ERROR) 2629 return (S_ERROR); 2630 if (error == 1) 2631 continue; 2632 } 2633 2634 /* 2635 * If this is a standard section type process it via the 2636 * appropriate action routine. 2637 */ 2638 if (row < SHT_NUM) { 2639 if (Initial[row][column] != NULL) { 2640 if (Initial[row][column](name, ifl, shdr, scn, 2641 ndx, ident, ofl) == S_ERROR) 2642 return (S_ERROR); 2643 } 2644 } else { 2645 /* 2646 * If this section is below SHT_LOSUNW then we don't 2647 * really know what to do with it, issue a warning 2648 * message but do the basic section processing anyway. 2649 */ 2650 if (row < (Word)SHT_LOSUNW) { 2651 Conv_inv_buf_t inv_buf; 2652 2653 eprintf(ofl->ofl_lml, ERR_WARNING, 2654 MSG_INTL(MSG_FIL_INVALSEC), ifl->ifl_name, 2655 EC_WORD(ndx), name, conv_sec_type( 2656 ifl->ifl_ehdr->e_ident[EI_OSABI], 2657 ifl->ifl_ehdr->e_machine, 2658 shdr->sh_type, 0, &inv_buf)); 2659 } 2660 2661 /* 2662 * Handle sections greater than SHT_LOSUNW. 2663 */ 2664 switch (row) { 2665 case SHT_SUNW_dof: 2666 if (process_section(name, ifl, shdr, scn, 2667 ndx, ident, ofl) == S_ERROR) 2668 return (S_ERROR); 2669 break; 2670 case SHT_SUNW_cap: 2671 if (process_section(name, ifl, shdr, scn, ndx, 2672 ld_targ.t_id.id_null, ofl) == S_ERROR) 2673 return (S_ERROR); 2674 capisp = ifl->ifl_isdesc[ndx]; 2675 break; 2676 case SHT_SUNW_capinfo: 2677 if (process_section(name, ifl, shdr, scn, ndx, 2678 ld_targ.t_id.id_null, ofl) == S_ERROR) 2679 return (S_ERROR); 2680 capinfoisp = ifl->ifl_isdesc[ndx]; 2681 break; 2682 case SHT_SUNW_DEBUGSTR: 2683 case SHT_SUNW_DEBUG: 2684 if (process_debug(name, ifl, shdr, scn, 2685 ndx, ident, ofl) == S_ERROR) 2686 return (S_ERROR); 2687 break; 2688 case SHT_SUNW_move: 2689 if (process_section(name, ifl, shdr, scn, ndx, 2690 ld_targ.t_id.id_null, ofl) == S_ERROR) 2691 return (S_ERROR); 2692 break; 2693 case SHT_SUNW_syminfo: 2694 if (process_section(name, ifl, shdr, scn, ndx, 2695 ld_targ.t_id.id_null, ofl) == S_ERROR) 2696 return (S_ERROR); 2697 sifisp = ifl->ifl_isdesc[ndx]; 2698 break; 2699 case SHT_SUNW_ANNOTATE: 2700 if (process_progbits(name, ifl, shdr, scn, 2701 ndx, ident, ofl) == S_ERROR) 2702 return (S_ERROR); 2703 break; 2704 case SHT_SUNW_COMDAT: 2705 if (process_progbits(name, ifl, shdr, scn, 2706 ndx, ident, ofl) == S_ERROR) 2707 return (S_ERROR); 2708 ifl->ifl_isdesc[ndx]->is_flags |= FLG_IS_COMDAT; 2709 break; 2710 case SHT_SUNW_verdef: 2711 if (process_section(name, ifl, shdr, scn, ndx, 2712 ld_targ.t_id.id_null, ofl) == S_ERROR) 2713 return (S_ERROR); 2714 vdfisp = ifl->ifl_isdesc[ndx]; 2715 break; 2716 case SHT_SUNW_verneed: 2717 if (process_section(name, ifl, shdr, scn, ndx, 2718 ld_targ.t_id.id_null, ofl) == S_ERROR) 2719 return (S_ERROR); 2720 vndisp = ifl->ifl_isdesc[ndx]; 2721 break; 2722 case SHT_SUNW_versym: 2723 if (process_section(name, ifl, shdr, scn, ndx, 2724 ld_targ.t_id.id_null, ofl) == S_ERROR) 2725 return (S_ERROR); 2726 vsyisp = ifl->ifl_isdesc[ndx]; 2727 break; 2728 case SHT_SPARC_GOTDATA: 2729 /* 2730 * SHT_SPARC_GOTDATA (0x70000000) is in the 2731 * SHT_LOPROC - SHT_HIPROC range reserved 2732 * for processor-specific semantics. It is 2733 * only meaningful for sparc targets. 2734 */ 2735 if (ld_targ.t_m.m_mach != 2736 LD_TARG_BYCLASS(EM_SPARC, EM_SPARCV9)) 2737 goto do_default; 2738 if (process_section(name, ifl, shdr, scn, ndx, 2739 ld_targ.t_id.id_gotdata, ofl) == S_ERROR) 2740 return (S_ERROR); 2741 break; 2742 #if defined(_ELF64) 2743 case SHT_AMD64_UNWIND: 2744 /* 2745 * SHT_AMD64_UNWIND (0x70000001) is in the 2746 * SHT_LOPROC - SHT_HIPROC range reserved 2747 * for processor-specific semantics. It is 2748 * only meaningful for amd64 targets. 2749 */ 2750 if (ld_targ.t_m.m_mach != EM_AMD64) 2751 goto do_default; 2752 2753 /* 2754 * Target is x86, so this really is 2755 * SHT_AMD64_UNWIND 2756 */ 2757 if (column == 0) { 2758 /* 2759 * column == ET_REL 2760 */ 2761 if (process_section(name, ifl, shdr, 2762 scn, ndx, ld_targ.t_id.id_unwind, 2763 ofl) == S_ERROR) 2764 return (S_ERROR); 2765 ifl->ifl_isdesc[ndx]->is_flags |= 2766 FLG_IS_EHFRAME; 2767 } 2768 break; 2769 #endif 2770 default: 2771 do_default: 2772 if (process_section(name, ifl, shdr, scn, ndx, 2773 ((ident == ld_targ.t_id.id_null) ? 2774 ident : ld_targ.t_id.id_user), ofl) == 2775 S_ERROR) 2776 return (S_ERROR); 2777 break; 2778 } 2779 } 2780 } 2781 2782 /* 2783 * Now that all input sections have been analyzed, and prior to placing 2784 * any input sections to their output sections, process any groups. 2785 * Groups can contribute COMDAT items, which may get discarded as part 2786 * of placement. In addition, COMDAT names may require transformation 2787 * to indicate different output section placement. 2788 */ 2789 if (ifl->ifl_flags & FLG_IS_GROUPS) { 2790 for (ndx = 1; ndx < ifl->ifl_shnum; ndx++) { 2791 Is_desc *isp; 2792 2793 if (((isp = ifl->ifl_isdesc[ndx]) == NULL) || 2794 (isp->is_shdr->sh_type != SHT_GROUP)) 2795 continue; 2796 2797 if (ld_group_process(isp, ofl) == S_ERROR) 2798 return (S_ERROR); 2799 } 2800 } 2801 2802 /* 2803 * Now that all of the input sections have been processed, place 2804 * them in the appropriate output sections. 2805 */ 2806 for (ndx = 1; ndx < ifl->ifl_shnum; ndx++) { 2807 Is_desc *isp; 2808 2809 if (((isp = ifl->ifl_isdesc[ndx]) == NULL) || 2810 ((isp->is_flags & FLG_IS_PLACE) == 0)) 2811 continue; 2812 2813 /* 2814 * Place all non-ordered sections within their appropriate 2815 * output section. 2816 */ 2817 if ((isp->is_flags & FLG_IS_ORDERED) == 0) { 2818 if (ld_place_section(ofl, isp, path_info, 2819 isp->is_keyident, NULL) == (Os_desc *)S_ERROR) 2820 return (S_ERROR); 2821 continue; 2822 } 2823 2824 /* 2825 * Count the number of ordered sections and retain the first 2826 * ordered section index. This will be used to optimize the 2827 * ordered section loop that immediately follows this one. 2828 */ 2829 ordcnt++; 2830 if (ordndx == 0) 2831 ordndx = ndx; 2832 } 2833 2834 /* 2835 * Having placed all the non-ordered sections, it is now 2836 * safe to place SHF_ORDERED/SHF_LINK_ORDER sections. 2837 */ 2838 if (ifl->ifl_flags & FLG_IF_ORDERED) { 2839 for (ndx = ordndx; ndx < ifl->ifl_shnum; ndx++) { 2840 Is_desc *isp; 2841 2842 if (((isp = ifl->ifl_isdesc[ndx]) == NULL) || 2843 ((isp->is_flags & 2844 (FLG_IS_PLACE | FLG_IS_ORDERED)) != 2845 (FLG_IS_PLACE | FLG_IS_ORDERED))) 2846 continue; 2847 2848 /* ld_process_ordered() calls ld_place_section() */ 2849 if (ld_process_ordered(ofl, ifl, path_info, ndx) == 2850 S_ERROR) 2851 return (S_ERROR); 2852 2853 /* If we've done them all, stop searching */ 2854 if (--ordcnt == 0) 2855 break; 2856 } 2857 } 2858 2859 /* 2860 * If this is a shared object explicitly specified on the command 2861 * line (as opposed to being a dependency of such an object), 2862 * determine if the user has specified a control definition. This 2863 * descriptor may specify which version definitions can be used 2864 * from this object. It may also update the dependency to USED and 2865 * supply an alternative SONAME. 2866 */ 2867 sdf = NULL; 2868 if (column && (ifl->ifl_flags & FLG_IF_NEEDED)) { 2869 const char *base; 2870 2871 /* 2872 * Use the basename of the input file (typically this is the 2873 * compilation environment name, ie. libfoo.so). 2874 */ 2875 if ((base = strrchr(ifl->ifl_name, '/')) == NULL) 2876 base = ifl->ifl_name; 2877 else 2878 base++; 2879 2880 if ((sdf = sdf_find(base, ofl->ofl_socntl)) != NULL) { 2881 sdf->sdf_file = ifl; 2882 ifl->ifl_sdfdesc = sdf; 2883 } 2884 } 2885 2886 /* 2887 * Before symbol processing, process any capabilities. Capabilities 2888 * can reference a string table, which is why this processing is 2889 * carried out after the initial section processing. Capabilities, 2890 * together with -z symbolcap, can require the conversion of global 2891 * symbols to local symbols. 2892 */ 2893 if (capisp && (process_cap(ofl, ifl, capisp) == S_ERROR)) 2894 return (S_ERROR); 2895 2896 /* 2897 * Process any version dependencies. These will establish shared object 2898 * `needed' entries in the same manner as will be generated from the 2899 * .dynamic's NEEDED entries. 2900 */ 2901 if (vndisp && (ofl->ofl_flags & (FLG_OF_NOUNDEF | FLG_OF_SYMBOLIC))) 2902 if (ld_vers_need_process(vndisp, ifl, ofl) == S_ERROR) 2903 return (S_ERROR); 2904 2905 /* 2906 * Before processing any symbol resolution or relocations process any 2907 * version sections. 2908 */ 2909 if (vsyisp) 2910 (void) ld_vers_sym_process(ofl->ofl_lml, vsyisp, ifl); 2911 2912 if (ifl->ifl_versym && 2913 (vdfisp || (sdf && (sdf->sdf_flags & FLG_SDF_SELECT)))) 2914 if (ld_vers_def_process(vdfisp, ifl, ofl) == S_ERROR) 2915 return (S_ERROR); 2916 2917 /* 2918 * Having collected the appropriate sections carry out any additional 2919 * processing if necessary. 2920 */ 2921 for (ndx = 0; ndx < ifl->ifl_shnum; ndx++) { 2922 Is_desc *isp; 2923 2924 if ((isp = ifl->ifl_isdesc[ndx]) == NULL) 2925 continue; 2926 row = isp->is_shdr->sh_type; 2927 2928 if ((isp->is_flags & FLG_IS_DISCARD) == 0) 2929 ld_sup_section(ofl, isp->is_name, isp->is_shdr, ndx, 2930 isp->is_indata, elf); 2931 2932 /* 2933 * If this is a SHT_SUNW_move section from a relocatable file, 2934 * keep track of the section for later processing. 2935 */ 2936 if ((row == SHT_SUNW_move) && (column == 0)) { 2937 if (aplist_append(&(ofl->ofl_ismove), isp, 2938 AL_CNT_OFL_MOVE) == NULL) 2939 return (S_ERROR); 2940 } 2941 2942 /* 2943 * If this is a standard section type process it via the 2944 * appropriate action routine. 2945 */ 2946 if (row < SHT_NUM) { 2947 if (Final[row][column] != NULL) { 2948 if (Final[row][column](isp, ifl, 2949 ofl) == S_ERROR) 2950 return (S_ERROR); 2951 } 2952 #if defined(_ELF64) 2953 } else if ((row == SHT_AMD64_UNWIND) && (column == 0)) { 2954 Os_desc *osp = isp->is_osdesc; 2955 2956 /* 2957 * SHT_AMD64_UNWIND (0x70000001) is in the SHT_LOPROC - 2958 * SHT_HIPROC range reserved for processor-specific 2959 * semantics, and is only meaningful for amd64 targets. 2960 * 2961 * Only process unwind contents from relocatable 2962 * objects. 2963 */ 2964 if (osp && (ld_targ.t_m.m_mach == EM_AMD64) && 2965 (ld_unwind_register(osp, ofl) == S_ERROR)) 2966 return (S_ERROR); 2967 #endif 2968 } 2969 } 2970 2971 /* 2972 * Following symbol processing, if this relocatable object input file 2973 * provides symbol capabilities, tag the associated symbols so that 2974 * the symbols can be re-assigned to the new capabilities symbol 2975 * section that will be created for the output file. 2976 */ 2977 if (capinfoisp && (ifl->ifl_ehdr->e_type == ET_REL) && 2978 (process_capinfo(ofl, ifl, capinfoisp) == S_ERROR)) 2979 return (S_ERROR); 2980 2981 /* 2982 * After processing any symbol resolution, and if this dependency 2983 * indicates it contains symbols that can't be directly bound to, 2984 * set the symbols appropriately. 2985 */ 2986 if (sifisp && ((ifl->ifl_flags & (FLG_IF_NEEDED | FLG_IF_NODIRECT)) == 2987 (FLG_IF_NEEDED | FLG_IF_NODIRECT))) 2988 (void) ld_sym_nodirect(sifisp, ifl, ofl); 2989 2990 return (1); 2991 } 2992 2993 /* 2994 * Process the current input file. There are basically three types of files 2995 * that come through here: 2996 * 2997 * - files explicitly defined on the command line (ie. foo.o or bar.so), 2998 * in this case only the `name' field is valid. 2999 * 3000 * - libraries determined from the -l command line option (ie. -lbar), 3001 * in this case the `soname' field contains the basename of the located 3002 * file. 3003 * 3004 * Any shared object specified via the above two conventions must be recorded 3005 * as a needed dependency. 3006 * 3007 * - libraries specified as dependencies of those libraries already obtained 3008 * via the command line (ie. bar.so has a DT_NEEDED entry of fred.so.1), 3009 * in this case the `soname' field contains either a full pathname (if the 3010 * needed entry contained a `/'), or the basename of the located file. 3011 * These libraries are processed to verify symbol binding but are not 3012 * recorded as dependencies of the output file being generated. 3013 */ 3014 Ifl_desc * 3015 ld_process_ifl(const char *name, const char *soname, int fd, Elf *elf, 3016 Word flags, Ofl_desc *ofl, Rej_desc *rej) 3017 { 3018 Ifl_desc *ifl; 3019 Ehdr *ehdr; 3020 uintptr_t error = 0; 3021 struct stat status; 3022 Ar_desc *adp; 3023 Rej_desc _rej; 3024 3025 /* 3026 * If this file was not extracted from an archive obtain its device 3027 * information. This will be used to determine if the file has already 3028 * been processed (rather than simply comparing filenames, the device 3029 * information provides a quicker comparison and detects linked files). 3030 */ 3031 if (fd && ((flags & FLG_IF_EXTRACT) == 0)) 3032 (void) fstat(fd, &status); 3033 else { 3034 status.st_dev = 0; 3035 status.st_ino = 0; 3036 } 3037 3038 switch (elf_kind(elf)) { 3039 case ELF_K_AR: 3040 /* 3041 * Determine if we've already come across this archive file. 3042 */ 3043 if (!(flags & FLG_IF_EXTRACT)) { 3044 Aliste idx; 3045 3046 for (APLIST_TRAVERSE(ofl->ofl_ars, idx, adp)) { 3047 if ((adp->ad_stdev != status.st_dev) || 3048 (adp->ad_stino != status.st_ino)) 3049 continue; 3050 3051 /* 3052 * We've seen this file before so reuse the 3053 * original archive descriptor and discard the 3054 * new elf descriptor. Note that a file 3055 * descriptor is unnecessary, as the file is 3056 * already available in memory. 3057 */ 3058 DBG_CALL(Dbg_file_reuse(ofl->ofl_lml, name, 3059 adp->ad_name)); 3060 (void) elf_end(elf); 3061 return ((Ifl_desc *)ld_process_archive(name, -1, 3062 adp, ofl)); 3063 } 3064 } 3065 3066 /* 3067 * As we haven't processed this file before establish a new 3068 * archive descriptor. 3069 */ 3070 adp = ld_ar_setup(name, elf, ofl); 3071 if ((adp == NULL) || (adp == (Ar_desc *)S_ERROR)) 3072 return ((Ifl_desc *)adp); 3073 adp->ad_stdev = status.st_dev; 3074 adp->ad_stino = status.st_ino; 3075 3076 ld_sup_file(ofl, name, ELF_K_AR, flags, elf); 3077 3078 /* 3079 * Indicate that the ELF descriptor no longer requires a file 3080 * descriptor by reading the entire file. The file is already 3081 * read via the initial mmap(2) behind elf_begin(3elf), thus 3082 * this operation is effectively a no-op. However, a side- 3083 * effect is that the internal file descriptor, maintained in 3084 * the ELF descriptor, is set to -1. This setting will not 3085 * be compared with any file descriptor that is passed to 3086 * elf_begin(), should this archive, or one of the archive 3087 * members, be processed again from the command line or 3088 * because of a -z rescan. 3089 */ 3090 if (elf_cntl(elf, ELF_C_FDREAD) == -1) { 3091 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_CNTL), 3092 name); 3093 ofl->ofl_flags |= FLG_OF_FATAL; 3094 return (NULL); 3095 } 3096 3097 return ((Ifl_desc *)ld_process_archive(name, -1, adp, ofl)); 3098 3099 case ELF_K_ELF: 3100 /* 3101 * Obtain the elf header so that we can determine what type of 3102 * elf ELF_K_ELF file this is. 3103 */ 3104 if ((ehdr = elf_getehdr(elf)) == NULL) { 3105 int _class = gelf_getclass(elf); 3106 3107 /* 3108 * Failure could occur for a number of reasons at this 3109 * point. Typically the files class is incorrect (ie. 3110 * user is building 64-bit but managed to pint at 32-bit 3111 * libraries). However any number of elf errors can 3112 * also occur, such as from a truncated or corrupt file. 3113 * Here we try and get the best error message possible. 3114 */ 3115 if (ld_targ.t_m.m_class != _class) { 3116 _rej.rej_type = SGS_REJ_CLASS; 3117 _rej.rej_info = (uint_t)_class; 3118 } else { 3119 _rej.rej_type = SGS_REJ_STR; 3120 _rej.rej_str = elf_errmsg(-1); 3121 } 3122 _rej.rej_name = name; 3123 DBG_CALL(Dbg_file_rejected(ofl->ofl_lml, &_rej, 3124 ld_targ.t_m.m_mach)); 3125 if (rej->rej_type == 0) { 3126 *rej = _rej; 3127 rej->rej_name = strdup(_rej.rej_name); 3128 } 3129 return (NULL); 3130 } 3131 3132 /* 3133 * Determine if we've already come across this file. 3134 */ 3135 if (!(flags & FLG_IF_EXTRACT)) { 3136 APlist *apl; 3137 Aliste idx; 3138 3139 if (ehdr->e_type == ET_REL) 3140 apl = ofl->ofl_objs; 3141 else 3142 apl = ofl->ofl_sos; 3143 3144 /* 3145 * Traverse the appropriate file list and determine if 3146 * a dev/inode match is found. 3147 */ 3148 for (APLIST_TRAVERSE(apl, idx, ifl)) { 3149 /* 3150 * Ifl_desc generated via -Nneed, therefore no 3151 * actual file behind it. 3152 */ 3153 if (ifl->ifl_flags & FLG_IF_NEEDSTR) 3154 continue; 3155 3156 if ((ifl->ifl_stino != status.st_ino) || 3157 (ifl->ifl_stdev != status.st_dev)) 3158 continue; 3159 3160 /* 3161 * Disregard (skip) this image. 3162 */ 3163 DBG_CALL(Dbg_file_skip(ofl->ofl_lml, 3164 ifl->ifl_name, name)); 3165 (void) elf_end(elf); 3166 3167 /* 3168 * If the file was explicitly defined on the 3169 * command line (this is always the case for 3170 * relocatable objects, and is true for shared 3171 * objects when they weren't specified via -l or 3172 * were dragged in as an implicit dependency), 3173 * then warn the user. 3174 */ 3175 if ((flags & FLG_IF_CMDLINE) || 3176 (ifl->ifl_flags & FLG_IF_CMDLINE)) { 3177 const char *errmsg; 3178 3179 /* 3180 * Determine whether this is the same 3181 * file name as originally encountered 3182 * so as to provide the most 3183 * descriptive diagnostic. 3184 */ 3185 errmsg = 3186 (strcmp(name, ifl->ifl_name) == 0) ? 3187 MSG_INTL(MSG_FIL_MULINC_1) : 3188 MSG_INTL(MSG_FIL_MULINC_2); 3189 eprintf(ofl->ofl_lml, ERR_WARNING, 3190 errmsg, name, ifl->ifl_name); 3191 } 3192 return (ifl); 3193 } 3194 } 3195 3196 /* 3197 * At this point, we know we need the file. Establish an input 3198 * file descriptor and continue processing. 3199 */ 3200 ifl = ifl_setup(name, ehdr, elf, flags, ofl, rej); 3201 if ((ifl == NULL) || (ifl == (Ifl_desc *)S_ERROR)) 3202 return (ifl); 3203 ifl->ifl_stdev = status.st_dev; 3204 ifl->ifl_stino = status.st_ino; 3205 3206 /* 3207 * If -zignore is in effect, mark this file as a potential 3208 * candidate (the files use isn't actually determined until 3209 * symbol resolution and relocation processing are completed). 3210 */ 3211 if (ofl->ofl_flags1 & FLG_OF1_IGNORE) 3212 ifl->ifl_flags |= FLG_IF_IGNORE; 3213 3214 switch (ehdr->e_type) { 3215 case ET_REL: 3216 (*ld_targ.t_mr.mr_mach_eflags)(ehdr, ofl); 3217 error = process_elf(ifl, elf, ofl); 3218 break; 3219 case ET_DYN: 3220 if ((ofl->ofl_flags & FLG_OF_STATIC) || 3221 !(ofl->ofl_flags & FLG_OF_DYNLIBS)) { 3222 eprintf(ofl->ofl_lml, ERR_FATAL, 3223 MSG_INTL(MSG_FIL_SOINSTAT), name); 3224 ofl->ofl_flags |= FLG_OF_FATAL; 3225 return (NULL); 3226 } 3227 3228 /* 3229 * Record any additional shared object information. 3230 * If no soname is specified (eg. this file was 3231 * derived from a explicit filename declaration on the 3232 * command line, ie. bar.so) use the pathname. 3233 * This entry may be overridden if the files dynamic 3234 * section specifies an DT_SONAME value. 3235 */ 3236 if (soname == NULL) 3237 ifl->ifl_soname = ifl->ifl_name; 3238 else 3239 ifl->ifl_soname = soname; 3240 3241 /* 3242 * If direct bindings, lazy loading, or group 3243 * permissions need to be established, mark this object. 3244 */ 3245 if (ofl->ofl_flags1 & FLG_OF1_ZDIRECT) 3246 ifl->ifl_flags |= FLG_IF_DIRECT; 3247 if (ofl->ofl_flags1 & FLG_OF1_LAZYLD) 3248 ifl->ifl_flags |= FLG_IF_LAZYLD; 3249 if (ofl->ofl_flags1 & FLG_OF1_GRPPRM) 3250 ifl->ifl_flags |= FLG_IF_GRPPRM; 3251 error = process_elf(ifl, elf, ofl); 3252 3253 /* 3254 * At this point we know if this file will be 3255 * lazyloaded, or whether bindings to it must be direct. 3256 * In either case, a syminfo section is required. 3257 */ 3258 if (ifl->ifl_flags & (FLG_IF_LAZYLD | FLG_IF_DIRECT)) 3259 ofl->ofl_flags |= FLG_OF_SYMINFO; 3260 3261 break; 3262 default: 3263 (void) elf_errno(); 3264 _rej.rej_type = SGS_REJ_UNKFILE; 3265 _rej.rej_name = name; 3266 DBG_CALL(Dbg_file_rejected(ofl->ofl_lml, &_rej, 3267 ld_targ.t_m.m_mach)); 3268 if (rej->rej_type == 0) { 3269 *rej = _rej; 3270 rej->rej_name = strdup(_rej.rej_name); 3271 } 3272 return (NULL); 3273 } 3274 break; 3275 default: 3276 (void) elf_errno(); 3277 _rej.rej_type = SGS_REJ_UNKFILE; 3278 _rej.rej_name = name; 3279 DBG_CALL(Dbg_file_rejected(ofl->ofl_lml, &_rej, 3280 ld_targ.t_m.m_mach)); 3281 if (rej->rej_type == 0) { 3282 *rej = _rej; 3283 rej->rej_name = strdup(_rej.rej_name); 3284 } 3285 return (NULL); 3286 } 3287 if ((error == 0) || (error == S_ERROR)) 3288 return ((Ifl_desc *)error); 3289 else 3290 return (ifl); 3291 } 3292 3293 /* 3294 * Having successfully opened a file, set up the necessary elf structures to 3295 * process it further. This small section of processing is slightly different 3296 * from the elf initialization required to process a relocatable object from an 3297 * archive (see libs.c: ld_process_archive()). 3298 */ 3299 Ifl_desc * 3300 ld_process_open(const char *opath, const char *ofile, int *fd, Ofl_desc *ofl, 3301 Word flags, Rej_desc *rej) 3302 { 3303 Elf *elf; 3304 const char *npath = opath; 3305 const char *nfile = ofile; 3306 3307 if ((elf = elf_begin(*fd, ELF_C_READ, NULL)) == NULL) { 3308 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_BEGIN), npath); 3309 ofl->ofl_flags |= FLG_OF_FATAL; 3310 return (NULL); 3311 } 3312 3313 /* 3314 * Determine whether the support library wishes to process this open. 3315 * The support library may return: 3316 * . a different ELF descriptor (in which case they should have 3317 * closed the original) 3318 * . a different file descriptor (in which case they should have 3319 * closed the original) 3320 * . a different path and file name (presumably associated with 3321 * a different file descriptor) 3322 * 3323 * A file descriptor of -1, or and ELF descriptor of zero indicates 3324 * the file should be ignored. 3325 */ 3326 ld_sup_open(ofl, &npath, &nfile, fd, flags, &elf, NULL, 0, 3327 elf_kind(elf)); 3328 3329 if ((*fd == -1) || (elf == NULL)) 3330 return (NULL); 3331 3332 return (ld_process_ifl(npath, nfile, *fd, elf, flags, ofl, rej)); 3333 } 3334 3335 /* 3336 * Having successfully mapped a file, set up the necessary elf structures to 3337 * process it further. This routine is patterned after ld_process_open() and 3338 * is only called by ld.so.1(1) to process a relocatable object. 3339 */ 3340 Ifl_desc * 3341 ld_process_mem(const char *path, const char *file, char *addr, size_t size, 3342 Ofl_desc *ofl, Rej_desc *rej) 3343 { 3344 Elf *elf; 3345 3346 if ((elf = elf_memory(addr, size)) == NULL) { 3347 eprintf(ofl->ofl_lml, ERR_ELF, MSG_INTL(MSG_ELF_MEMORY), path); 3348 ofl->ofl_flags |= FLG_OF_FATAL; 3349 return (0); 3350 } 3351 3352 return (ld_process_ifl(path, file, 0, elf, 0, ofl, rej)); 3353 } 3354 3355 /* 3356 * Process a required library (i.e. the dependency of a shared object). 3357 * Combine the directory and filename, check the resultant path size, and try 3358 * opening the pathname. 3359 */ 3360 static Ifl_desc * 3361 process_req_lib(Sdf_desc *sdf, const char *dir, const char *file, 3362 Ofl_desc *ofl, Rej_desc *rej) 3363 { 3364 size_t dlen, plen; 3365 int fd; 3366 char path[PATH_MAX]; 3367 const char *_dir = dir; 3368 3369 /* 3370 * Determine the sizes of the directory and filename to insure we don't 3371 * exceed our buffer. 3372 */ 3373 if ((dlen = strlen(dir)) == 0) { 3374 _dir = MSG_ORIG(MSG_STR_DOT); 3375 dlen = 1; 3376 } 3377 dlen++; 3378 plen = dlen + strlen(file) + 1; 3379 if (plen > PATH_MAX) { 3380 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_FIL_PTHTOLONG), 3381 _dir, file); 3382 ofl->ofl_flags |= FLG_OF_FATAL; 3383 return (0); 3384 } 3385 3386 /* 3387 * Build the entire pathname and try and open the file. 3388 */ 3389 (void) strcpy(path, _dir); 3390 (void) strcat(path, MSG_ORIG(MSG_STR_SLASH)); 3391 (void) strcat(path, file); 3392 DBG_CALL(Dbg_libs_req(ofl->ofl_lml, sdf->sdf_name, 3393 sdf->sdf_rfile, path)); 3394 3395 if ((fd = open(path, O_RDONLY)) == -1) 3396 return (0); 3397 else { 3398 Ifl_desc *ifl; 3399 char *_path; 3400 3401 if ((_path = libld_malloc(strlen(path) + 1)) == NULL) 3402 return ((Ifl_desc *)S_ERROR); 3403 (void) strcpy(_path, path); 3404 ifl = ld_process_open(_path, &_path[dlen], &fd, ofl, 0, rej); 3405 if (fd != -1) 3406 (void) close(fd); 3407 return (ifl); 3408 } 3409 } 3410 3411 /* 3412 * Finish any library processing. Walk the list of so's that have been listed 3413 * as "included" by shared objects we have previously processed. Examine them, 3414 * without adding them as explicit dependents of this program, in order to 3415 * complete our symbol definition process. The search path rules are: 3416 * 3417 * - use any user supplied paths, i.e. LD_LIBRARY_PATH and -L, then 3418 * 3419 * - use any RPATH defined within the parent shared object, then 3420 * 3421 * - use the default directories, i.e. LIBPATH or -YP. 3422 */ 3423 uintptr_t 3424 ld_finish_libs(Ofl_desc *ofl) 3425 { 3426 Aliste idx1; 3427 Sdf_desc *sdf; 3428 Rej_desc rej = { 0 }; 3429 3430 /* 3431 * Make sure we are back in dynamic mode. 3432 */ 3433 ofl->ofl_flags |= FLG_OF_DYNLIBS; 3434 3435 for (APLIST_TRAVERSE(ofl->ofl_soneed, idx1, sdf)) { 3436 Aliste idx2; 3437 char *path, *slash = NULL; 3438 int fd; 3439 Ifl_desc *ifl; 3440 char *file = (char *)sdf->sdf_name; 3441 3442 /* 3443 * See if this file has already been processed. At the time 3444 * this implicit dependency was determined there may still have 3445 * been more explicit dependencies to process. Note, if we ever 3446 * do parse the command line three times we would be able to 3447 * do all this checking when processing the dynamic section. 3448 */ 3449 if (sdf->sdf_file) 3450 continue; 3451 3452 for (APLIST_TRAVERSE(ofl->ofl_sos, idx2, ifl)) { 3453 if (!(ifl->ifl_flags & FLG_IF_NEEDSTR) && 3454 (strcmp(file, ifl->ifl_soname) == 0)) { 3455 sdf->sdf_file = ifl; 3456 break; 3457 } 3458 } 3459 if (sdf->sdf_file) 3460 continue; 3461 3462 /* 3463 * If the current path name element embeds a "/", then it's to 3464 * be taken "as is", with no searching involved. Process all 3465 * "/" occurrences, so that we can deduce the base file name. 3466 */ 3467 for (path = file; *path; path++) { 3468 if (*path == '/') 3469 slash = path; 3470 } 3471 if (slash) { 3472 DBG_CALL(Dbg_libs_req(ofl->ofl_lml, sdf->sdf_name, 3473 sdf->sdf_rfile, file)); 3474 if ((fd = open(file, O_RDONLY)) == -1) { 3475 eprintf(ofl->ofl_lml, ERR_WARNING, 3476 MSG_INTL(MSG_FIL_NOTFOUND), file, 3477 sdf->sdf_rfile); 3478 } else { 3479 Rej_desc _rej = { 0 }; 3480 3481 ifl = ld_process_open(file, ++slash, &fd, ofl, 3482 0, &_rej); 3483 if (fd != -1) 3484 (void) close(fd); 3485 if (ifl == (Ifl_desc *)S_ERROR) 3486 return (S_ERROR); 3487 3488 if (_rej.rej_type) { 3489 Conv_reject_desc_buf_t rej_buf; 3490 3491 eprintf(ofl->ofl_lml, ERR_WARNING, 3492 MSG_INTL(reject[_rej.rej_type]), 3493 _rej.rej_name ? rej.rej_name : 3494 MSG_INTL(MSG_STR_UNKNOWN), 3495 conv_reject_desc(&_rej, &rej_buf, 3496 ld_targ.t_m.m_mach)); 3497 } else 3498 sdf->sdf_file = ifl; 3499 } 3500 continue; 3501 } 3502 3503 /* 3504 * Now search for this file in any user defined directories. 3505 */ 3506 for (APLIST_TRAVERSE(ofl->ofl_ulibdirs, idx2, path)) { 3507 Rej_desc _rej = { 0 }; 3508 3509 ifl = process_req_lib(sdf, path, file, ofl, &_rej); 3510 if (ifl == (Ifl_desc *)S_ERROR) { 3511 return (S_ERROR); 3512 } 3513 if (_rej.rej_type) { 3514 if (rej.rej_type == 0) { 3515 rej = _rej; 3516 rej.rej_name = strdup(_rej.rej_name); 3517 } 3518 } 3519 if (ifl) { 3520 sdf->sdf_file = ifl; 3521 break; 3522 } 3523 } 3524 if (sdf->sdf_file) 3525 continue; 3526 3527 /* 3528 * Next use the local rules defined within the parent shared 3529 * object. 3530 */ 3531 if (sdf->sdf_rpath != NULL) { 3532 char *rpath, *next; 3533 3534 rpath = libld_malloc(strlen(sdf->sdf_rpath) + 1); 3535 if (rpath == NULL) 3536 return (S_ERROR); 3537 (void) strcpy(rpath, sdf->sdf_rpath); 3538 DBG_CALL(Dbg_libs_path(ofl->ofl_lml, rpath, 3539 LA_SER_RUNPATH, sdf->sdf_rfile)); 3540 if ((path = strtok_r(rpath, 3541 MSG_ORIG(MSG_STR_COLON), &next)) != NULL) { 3542 do { 3543 Rej_desc _rej = { 0 }; 3544 3545 path = expand(sdf->sdf_rfile, path, 3546 &next); 3547 3548 ifl = process_req_lib(sdf, path, 3549 file, ofl, &_rej); 3550 if (ifl == (Ifl_desc *)S_ERROR) { 3551 return (S_ERROR); 3552 } 3553 if ((_rej.rej_type) && 3554 (rej.rej_type == 0)) { 3555 rej = _rej; 3556 rej.rej_name = 3557 strdup(_rej.rej_name); 3558 } 3559 if (ifl) { 3560 sdf->sdf_file = ifl; 3561 break; 3562 } 3563 } while ((path = strtok_r(NULL, 3564 MSG_ORIG(MSG_STR_COLON), &next)) != NULL); 3565 } 3566 } 3567 if (sdf->sdf_file) 3568 continue; 3569 3570 /* 3571 * Finally try the default library search directories. 3572 */ 3573 for (APLIST_TRAVERSE(ofl->ofl_dlibdirs, idx2, path)) { 3574 Rej_desc _rej = { 0 }; 3575 3576 ifl = process_req_lib(sdf, path, file, ofl, &rej); 3577 if (ifl == (Ifl_desc *)S_ERROR) { 3578 return (S_ERROR); 3579 } 3580 if (_rej.rej_type) { 3581 if (rej.rej_type == 0) { 3582 rej = _rej; 3583 rej.rej_name = strdup(_rej.rej_name); 3584 } 3585 } 3586 if (ifl) { 3587 sdf->sdf_file = ifl; 3588 break; 3589 } 3590 } 3591 if (sdf->sdf_file) 3592 continue; 3593 3594 /* 3595 * If we've got this far we haven't found the shared object. 3596 * If an object was found, but was rejected for some reason, 3597 * print a diagnostic to that effect, otherwise generate a 3598 * generic "not found" diagnostic. 3599 */ 3600 if (rej.rej_type) { 3601 Conv_reject_desc_buf_t rej_buf; 3602 3603 eprintf(ofl->ofl_lml, ERR_WARNING, 3604 MSG_INTL(reject[rej.rej_type]), 3605 rej.rej_name ? rej.rej_name : 3606 MSG_INTL(MSG_STR_UNKNOWN), 3607 conv_reject_desc(&rej, &rej_buf, 3608 ld_targ.t_m.m_mach)); 3609 } else { 3610 eprintf(ofl->ofl_lml, ERR_WARNING, 3611 MSG_INTL(MSG_FIL_NOTFOUND), file, sdf->sdf_rfile); 3612 } 3613 } 3614 3615 /* 3616 * Finally, now that all objects have been input, make sure any version 3617 * requirements have been met. 3618 */ 3619 return (ld_vers_verify(ofl)); 3620 } 3621