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 * Local include file for ld library. 32 */ 33 34 #ifndef _LIBLD_DOT_H 35 #define _LIBLD_DOT_H 36 37 #include <libld.h> 38 #include <_libelf.h> 39 #include <debug.h> 40 #include <conv.h> 41 #include <msg.h> 42 #include <reloc_defs.h> 43 44 #ifdef __cplusplus 45 extern "C" { 46 #endif 47 48 /* 49 * In order to allow for cross linking, we need to be able to build 50 * libld with support for multiple targets within a single object. 51 * This is done using a global variable (ld_targ) of type Target to 52 * access target-specific code for the current target via indirection. 53 */ 54 55 /* 56 * Machine information for target 57 */ 58 typedef struct { 59 Half m_mach; /* ELF machine code for target */ 60 Half m_machplus; /* Alt ELF machine code for target */ 61 /* Used for EM_SPARC32PLUS */ 62 Word m_flagsplus; /* ELF header flags used to identify */ 63 /* a machplus object */ 64 uchar_t m_class; /* Target ELFCLASS */ 65 uchar_t m_data; /* Target byte order */ 66 67 Xword m_segm_align; /* segment alignment */ 68 Xword m_segm_origin; /* Default 1st segment origin */ 69 Xword m_segm_aorigin; /* Alternative 1st segment origin */ 70 Word m_dataseg_perm; /* data segment permission mask */ 71 Word m_stack_perm; /* ABI default stack permission mask */ 72 Word m_word_align; /* alignment to use for Word sections */ 73 const char *m_def_interp; /* Def. interpreter for dyn objects */ 74 75 /* Relocation type codes */ 76 Word m_r_arrayaddr; 77 Word m_r_copy; 78 Word m_r_glob_dat; 79 Word m_r_jmp_slot; 80 Word m_r_num; 81 Word m_r_none; 82 Word m_r_relative; 83 Word m_r_register; 84 85 /* Relocation related constants */ 86 Word m_rel_dt_count; /* Either DT_REL or DT_RELA */ 87 Word m_rel_dt_ent; /* Either DT_RELENT or DT_RELAENT */ 88 Word m_rel_dt_size; /* Either DT_RELSZ or DT_RELASZ */ 89 Word m_rel_dt_type; /* Either DT_RELCOUNT or DT_RELACOUNT */ 90 Word m_rel_sht_type; /* Either SHT_REL or SHT_RELA */ 91 92 /* GOT related constants */ 93 Word m_got_entsize; 94 Word m_got_xnumber; /* reserved # of got ents */ 95 96 /* PLT related constants */ 97 Word m_plt_align; 98 Word m_plt_entsize; 99 Word m_plt_reservsz; 100 Word m_plt_shf_flags; 101 102 /* Section type of .eh_frame/.eh_frame_hdr sections */ 103 Word m_sht_unwind; 104 105 Word m_dt_register; 106 } Target_mach; 107 108 109 /* 110 * Section identifiers, used to order sections in output object 111 */ 112 typedef struct { 113 Word id_array; 114 Word id_bss; 115 Word id_cap; 116 Word id_data; 117 Word id_dynamic; 118 Word id_dynsort; 119 Word id_dynstr; 120 Word id_dynsym; 121 Word id_dynsym_ndx; 122 Word id_got; 123 Word id_gotdata; 124 Word id_hash; 125 Word id_interp; 126 Word id_lbss; 127 Word id_ldynsym; 128 Word id_note; 129 Word id_null; 130 Word id_plt; 131 Word id_rel; 132 Word id_strtab; 133 Word id_syminfo; 134 Word id_symtab; 135 Word id_symtab_ndx; 136 Word id_text; 137 Word id_tls; 138 Word id_tlsbss; 139 Word id_unknown; 140 Word id_unwind; 141 Word id_unwindhdr; 142 Word id_user; 143 Word id_version; 144 } Target_machid; 145 146 /* 147 * Target_nullfunc supplies machine code for generating a 148 * 149 * void (*)(void) 150 * 151 * unnamed function. Such a function can be called, and returns 152 * immediately without doing any work. This is used to back FUNC 153 * symbol definitions added with a mapfile. 154 * 155 * The machine instructions are specified as an array of bytes rather 156 * than a larger integer type in order to avoid byte order issues that 157 * can otherwise occur in cross linking. 158 */ 159 typedef struct { 160 const uchar_t *nf_template; /* Array of machine inst. bytes */ 161 size_t nf_size; /* # bytes in nf_template */ 162 } Target_nullfunc; 163 164 /* 165 * Target_fill supplies machine code for fill bytes in executable output 166 * sections. Normally, libelf fills the gaps caused by alignment and size 167 * requirements of the constituent input sections with 0. Depending on the 168 * target architecture, it may be desirable to instead fill with executable 169 * NOP instructions. There are two reasons to do this: 170 * 171 * - So that .init/.fini sections will not contain unexecutable gaps 172 * that cause the executing program to trap and die. 173 * 174 * - To eliminate confusing garbage instructions between sections containing 175 * executable code when viewed with a dissassembler. 176 * 177 * The ff_execfill function is allowed to be NULL if the underlying target 178 * does not require a special fill for executable sections. 179 */ 180 typedef struct { 181 _elf_execfill_func_t *ff_execfill; 182 } Target_fillfunc; 183 184 /* 185 * Target_machrel holds pointers to the reloc_table and machrel functions 186 * for a given target machine. 187 * 188 * The following function pointers are allowed to be NULL, if the 189 * underlying target does not require the specified operation. All 190 * other functions must be supplied: 191 * 192 * mr_assign_got 193 * mr_reloc_register 194 * mr_reloc_GOTOP 195 * mr_allocate_got 196 */ 197 typedef struct { 198 const Rel_entry *mr_reloc_table; 199 200 Word (* mr_init_rel)(Rel_desc *, void *); 201 void (* mr_mach_eflags)(Ehdr *, Ofl_desc *); 202 void (* mr_mach_make_dynamic)(Ofl_desc *, size_t *); 203 void (* mr_mach_update_odynamic)(Ofl_desc *, Dyn **); 204 Xword (* mr_calc_plt_addr)(Sym_desc *, Ofl_desc *); 205 uintptr_t (* mr_perform_outreloc)(Rel_desc *, Ofl_desc *); 206 uintptr_t (* mr_do_activerelocs)(Ofl_desc *); 207 uintptr_t (* mr_add_outrel)(Word, Rel_desc *, Ofl_desc *); 208 uintptr_t (* mr_reloc_register)(Rel_desc *, Is_desc *, 209 Ofl_desc *); 210 uintptr_t (* mr_reloc_local)(Rel_desc *, Ofl_desc *); 211 uintptr_t (* mr_reloc_GOTOP)(Boolean, Rel_desc *, Ofl_desc *); 212 uintptr_t (* mr_reloc_TLS)(Boolean, Rel_desc *, Ofl_desc *); 213 uintptr_t (* mr_assign_got)(Ofl_desc *, Sym_desc *); 214 215 Gotndx *(* mr_find_got_ndx)(Alist *, Gotref, Ofl_desc *, 216 Rel_desc *); 217 Xword (* mr_calc_got_offset)(Rel_desc *, Ofl_desc *); 218 uintptr_t (* mr_assign_got_ndx)(Alist **, Gotndx *, Gotref, 219 Ofl_desc *, Rel_desc *, Sym_desc *); 220 void (* mr_assign_plt_ndx)(Sym_desc *, Ofl_desc *); 221 uintptr_t (* mr_allocate_got)(Ofl_desc *); 222 uintptr_t (* mr_fillin_gotplt)(Ofl_desc *); 223 } Target_machrel; 224 225 226 /* 227 * Target_machsym holds pointers to the machsym functions 228 * for a given target machine. 229 * 230 * These fields are allowed to be NULL for targets that do not require 231 * special handling of register symbols. Register symbols are used by 232 * sparc targets. If any of these fields are non-NULL, all of them are 233 * required to be present (use empty stub routines if necessary). 234 */ 235 typedef struct { 236 int (* ms_reg_check)(Sym_desc *, Sym *, const char *, 237 Ifl_desc *, Ofl_desc *); 238 int (* ms_mach_sym_typecheck)(Sym_desc *, Sym *, 239 Ifl_desc *, Ofl_desc *); 240 const char *(* ms_is_regsym)(Ofl_desc *, Ifl_desc *, Sym *, 241 const char *, int, Word, const char *, sd_flag_t *); 242 Sym_desc *(* ms_reg_find)(Sym * sym, Ofl_desc * ofl); 243 int (* ms_reg_enter)(Sym_desc *, Ofl_desc *); 244 } Target_machsym; 245 246 typedef struct { 247 Target_mach t_m; 248 Target_machid t_id; 249 Target_nullfunc t_nf; 250 Target_fillfunc t_ff; 251 Target_machrel t_mr; 252 Target_machsym t_ms; 253 } Target; 254 255 /* 256 * Structure to manage the update of weak symbols from their associated alias. 257 */ 258 typedef struct wk_desc { 259 Sym *wk_symtab; /* the .symtab entry */ 260 Sym *wk_dynsym; /* the .dynsym entry */ 261 Sym_desc *wk_weak; /* the original weak symbol */ 262 Sym_desc *wk_alias; /* the real symbol */ 263 } Wk_desc; 264 265 /* 266 * Structure to manage the support library interfaces. 267 */ 268 typedef struct func_list { 269 const char *fl_obj; /* name of support object */ 270 /* function is from */ 271 void (*fl_fptr)(); /* function pointer */ 272 uint_t fl_version; /* ld_version() level */ 273 } Func_list; 274 275 typedef struct support_list { 276 const char *sup_name; /* ld_support function name */ 277 Alist *sup_funcs; /* list of support functions */ 278 } Support_list; 279 280 /* 281 * Structure to manage a sorted output relocation list. 282 * 283 * rl_key1 -> pointer to needed ndx 284 * rl_key2 -> pointer to symbol relocation is against 285 * rl_key3 -> virtual offset of relocation 286 */ 287 typedef struct reloc_list { 288 Sym_desc *rl_key2; 289 Xword rl_key3; 290 Rel_desc *rl_rsp; 291 Half rl_key1; 292 } Reloc_list; 293 294 295 typedef struct sym_s_list { 296 Word sl_hval; 297 Sym_desc *sl_sdp; 298 } Sym_s_list; 299 300 /* 301 * ld heap management structure 302 */ 303 typedef struct _ld_heap Ld_heap; 304 struct _ld_heap { 305 Ld_heap *lh_next; 306 void *lh_free; 307 void *lh_end; 308 }; 309 310 #define HEAPBLOCK 0x800000 /* default allocation block size */ 311 #define HEAPALIGN 0x8 /* heap blocks alignment requirement */ 312 313 /* 314 * Dynamic per-symbol filtee string table descriptor. This associates filtee 315 * strings that will be created in the .dynstr, with .dynamic entries. 316 */ 317 typedef struct { 318 const char *dft_str; /* dynstr string */ 319 Word dft_flag; /* auxiliary/filtee type */ 320 Half dft_ndx; /* eventual ndx into .dynamic */ 321 } Dfltr_desc; 322 323 /* 324 * Per-symbol filtee descriptor. This associates symbol definitions with 325 * their filtees. 326 */ 327 typedef struct { 328 Sym_desc *sft_sdp; /* symbol descriptor */ 329 Aliste sft_idx; /* index into dtstr descriptor */ 330 } Sfltr_desc; 331 332 /* 333 * Define Alist initialization sizes. 334 */ 335 #define AL_CNT_IFL_GROUPS 20 /* ifl_groups */ 336 #define AL_CNT_IFL_RELSECS 6 /* ifl_relsect */ 337 338 #define AL_CNT_OFL_DTSFLTRS 4 /* ofl_dtsfltrs */ 339 #define AL_CNT_OFL_SYMFLTRS 20 /* ofl_symfltrs */ 340 #define AL_CNT_OFL_MAPSECS 10 /* ofl_map{text|data} */ 341 #define AL_CNT_OFL_OBJS 50 /* ofl_objs */ 342 #define AL_CNT_OFL_LIBS 10 /* ofl_sos */ 343 #define AL_CNT_OFL_LIBDIRS 10 /* ofl_[ud]libdirs */ 344 #define AL_CNT_OFL_MAPFILES 6 /* ofl_maps */ 345 #define AL_CNT_OFL_ENTRANCE 10 /* ofl_ents */ 346 #define AL_CNT_OFL_RELS 4 /* ofl_outrels */ 347 #define AL_CNT_OFL_COPYRELS 10 /* ofl_copyrels */ 348 #define AL_CNT_OFL_ARRAYS 10 /* ofl_{init|fini|prei}array */ 349 #define AL_CNT_OFL_OSGROUPS 10 /* ofl_osgroups */ 350 #define AL_CNT_OFL_OSTLSSEG 4 /* ofl_ostlsseg */ 351 #define AL_CNT_OFL_ORDERED 4 /* ofl_ordered */ 352 #define AL_CNT_OFL_SYMINFOSYMS 50 /* ofl_syminfsyms */ 353 #define AL_CNT_OFL_MOVE 10 /* ofl_ismove */ 354 #define AL_CNT_OFL_UNWIND 1 /* ofl_unwind */ 355 #define AL_CNT_OFL_PARSYMS 10 /* ofl_parsyms */ 356 357 #define AL_CNT_OS_MSTRISDESCS 10 /* os_mstrisdescs */ 358 #define AL_CNT_OS_RELISDESCS 100 /* os_relisdescs */ 359 #define AL_CNT_OS_COMDATS 20 /* os_comdats */ 360 #define AL_CNT_OS_ISDESCS_BA 4 /* os_isdesc: BEFORE|AFTER */ 361 #define AL_CNT_OS_ISDESCS 60 /* os_isdesc: ORDERED|DEFAULT */ 362 363 #define AL_CNT_SG_IS_ORDER 40 /* sg_is_order */ 364 #define AL_CNT_SG_OSDESC 40 /* sg_osdescs */ 365 #define AL_CNT_SG_SECORDER 40 /* sg_secorder */ 366 #define AL_CNT_SG_SIZESYM 1 /* sg_sizesym */ 367 368 #define AL_CNT_SDP_GOT 1 /* sd_GOTndxs */ 369 #define AL_CNT_SDP_MOVE 1 /* sd_move */ 370 #define AL_CNT_SDP_DFILES 1 /* sa_dfiles */ 371 372 #define AL_CNT_SDF_VERSIONS 2 /* sdf_{vers|verneed} */ 373 374 #define AL_CNT_EC_FILES 1 /* ec_files */ 375 376 #define AL_CNT_VERDESCS 20 /* version desc */ 377 #define AL_CNT_WEAK 20 /* weak desc */ 378 #define AL_CNT_SUPPORT 2 /* support libraries */ 379 #define AL_CNT_STRMRGREL 500 /* ld_make_strmerge() reloc alist cnt */ 380 #define AL_CNT_STRMRGSYM 20 /* ld_make_strmerge() sym alist cnt */ 381 #define AL_CNT_SEGMENTS 20 /* ofl_segs */ 382 383 /* 384 * Return codes for {tls|got}_fixups() routines 385 */ 386 typedef enum { 387 FIX_ERROR, /* fatal error - time to punt */ 388 FIX_DONE, /* relocation done - no further processing required */ 389 FIX_RELOC /* do_reloc() relocation processing required */ 390 } Fixupret; 391 392 #ifndef FILENAME_MAX 393 #define FILENAME_MAX BUFSIZ /* maximum length of a path name */ 394 #endif 395 396 /* 397 * We pad the end of the .dynstr section with a block of DYNSTR_EXTRA_PAD 398 * bytes, and we insert DYNAMIC_EXTRA_ELTS unused items into the 399 * .dynamic section (with value DT_NULL). This provides the resources needed 400 * to add and/or alter string items in the .dynamic section, such as runpath. 401 */ 402 #define DYNSTR_EXTRA_PAD 512 403 #define DYNAMIC_EXTRA_ELTS 10 404 405 /* 406 * Relocation buckets are sized based on the number of input relocations and 407 * the following constants. 408 */ 409 #define REL_HAIDESCNO 1000 /* high water mark active buckets */ 410 #define REL_LAIDESCNO 50 /* low water mark active buckets */ 411 #define REL_HOIDESCNO 500 /* high water mark output buckets */ 412 #define REL_LOIDESCNO 10 /* low water mark output buckets */ 413 414 /* 415 * Given a symbol of a type that is allowed within a .SUNW_dynsymsort or 416 * .SUNW_dyntlssort section, examine the symbol attributes to determine 417 * if this particular symbol should be included or not. 418 * 419 * entry: 420 * The symbol must have an allowed type: Either a type verified by 421 * dynsymsort_symtype[] or STT_TLS. 422 * 423 * _sdp - Pointer to symbol descriptor 424 * _sym - Pointer to symbol referenced by _sdp. 425 * 426 * _sym is derivable from _sdp: _sdp->sd_sym 427 * However, most callers assign it to a local variable for efficiency, 428 * and this macro allows such a variable to be used within. If you 429 * don't have such a variable, supply _sdp->sd_sym. 430 * 431 * The tests used require some explanation: 432 * 433 * (_sdp->sd_flags & FLG_SY_DYNSORT) 434 * Some special symbols are kept even if they don't meet the 435 * usual requirements. These symbols have the FLG_SY_DYNSORT 436 * bit set. If this bit isn't set then we look at the other 437 * attributes. 438 * 439 * (((_sdp->sd_ref != REF_DYN_NEED) && 440 * (_sdp->sd_sym->st_shndx != SHN_UNDEF)) 441 * || (_sdp->sd_flags & FLG_SY_MVTOCOMM)) 442 * We do not want to include symbols that are not defined within 443 * the object we are creating. REF_DYN_NEED corresponds to those 444 * UNDEF items. However, if the symbol is the target of a copy 445 * relocation, then it effectively becomes defined within the 446 * object after all. FLG_SY_MVTOCOMM indicates a copy relocation, 447 * and prevents us from culling those exceptions. 448 * 449 * (_sym->st_size != 0) 450 * Symbols with 0 length are labels injected by the compilers 451 * or the linker for purposes of code generation, and do 452 * not directly correspond to actual code. In fact, most of the 453 * symbols we mark with FLG_SY_DYNSORT need that flag set because 454 * they have size 0. This size test filters out the others. 455 * 456 * !(_sdp->sd_flags & FLG_SY_NODYNSORT) 457 * Some symbols are not kept, even though they do meet the usual 458 * requirements. These symbols have FLG_SY_NODYNSORT set. 459 * For example, if there are weak and non-weak versions of a given 460 * symbol, we only want to keep one of them. So, we set 461 * FLG_SY_NODYNSORT on the one we don't want. 462 */ 463 #define DYNSORT_TEST_ATTR(_sdp, _sym) \ 464 ((_sdp->sd_flags & FLG_SY_DYNSORT) || \ 465 ((((_sdp->sd_ref != REF_DYN_NEED) && \ 466 (_sdp->sd_sym->st_shndx != SHN_UNDEF)) || \ 467 (_sdp->sd_flags & FLG_SY_MVTOCOMM)) && \ 468 (_sym->st_size != 0) && \ 469 !(_sdp->sd_flags & FLG_SY_NODYNSORT))) 470 471 /* 472 * We use output section descriptor counters to add up the number of 473 * symbol indexes to put in the .SUNW_dynsort and .SUNW_dyntlssort sections. 474 * Non-TLS symbols are counted by ofl->ofl_dynsymsortcnt, while TLS symbols are 475 * counted by ofl->ofl_dyntlssortcnt. This computation is done inline in 476 * several places. The DYNSORT_COUNT macro allows us to generate this from 477 * a single description. 478 * 479 * entry: 480 * _sdp, _sym - As per DYNSORT_TEST_ATTR 481 * _type - Type of symbol (STT_*) 482 * _inc_or_dec_op - Either ++, or --. This specifies the operation 483 * to be applied to the counter, and determines whether we 484 * are adding, or removing, a symbol from .SUNW_dynsymsort. 485 * 486 * Note that _type is derivable from _sym: ELF_ST_TYPE(_sdp->sd_sym->st_info). 487 * Most callers already have it in a variable, so this allows us to use that 488 * variable. If you don't have such a variable, use ELF_ST_TYPE() as shown. 489 */ 490 #define DYNSORT_COUNT(_sdp, _sym, _type, _inc_or_dec_op) \ 491 { \ 492 Word *_cnt_var; \ 493 \ 494 if (dynsymsort_symtype[_type]) { /* Non-TLS counter */ \ 495 _cnt_var = &ofl->ofl_dynsymsortcnt; \ 496 } else if ((_type) == STT_TLS) { /* TLS counter */ \ 497 _cnt_var = &ofl->ofl_dyntlssortcnt; \ 498 } else { /* Don't count this symbol */ \ 499 _cnt_var = NULL; \ 500 } \ 501 if ((_cnt_var != NULL) && DYNSORT_TEST_ATTR(_sdp, _sym)) \ 502 (*_cnt_var)_inc_or_dec_op; /* Increment/Decrement */ \ 503 } 504 505 /* 506 * The OFL_SWAP_RELOC macros are used to determine whether 507 * relocation processing needs to swap the data being relocated. 508 * It is an optimization to ld_swap_reloc_data(), as it avoids 509 * the function call in the case where the linker host and the 510 * target have the same byte order. 511 */ 512 #define OFL_SWAP_RELOC_DATA(_ofl, _rel) \ 513 (((_ofl)->ofl_flags1 & FLG_OF1_ENCDIFF) && \ 514 ld_swap_reloc_data(_ofl, _rel)) 515 516 /* 517 * Define an AVL node for maintaining input section descriptors. AVL trees of 518 * these descriptors are used to process group and COMDAT section. 519 * 520 * Pure COMDAT uses the input section name as the search key, while 521 * SHT_GROUP sections use the name of a special signature symbol. We 522 * support both by using the isd_name field to carry the name. An alternative 523 * design would be to use a separate type for each use, saving the cost 524 * of the unneeded pointer for pure COMDAT. We favor a single implementation 525 * because we believe that SHT_GROUP comdat will be more common going forward, 526 * particularly in the largest objects produced by C++ where SHT_GROUP is 527 * needed to manage the complex section relationships. In contrast, we think 528 * that pure COMDAT is both more rare, and used in smaller objects where the 529 * cost of an extra pointer per node is relatively unimportant. 530 */ 531 typedef struct { 532 avl_node_t isd_avl; /* avl book-keeping (see SGSOFFSETOF) */ 533 Is_desc *isd_isp; /* input section descriptor */ 534 const char *isd_name; /* name used as search key */ 535 uint_t isd_hash; /* input section name hash value */ 536 } Isd_node; 537 538 /* 539 * Type used to break down an input file path into its component parts, 540 * as used by ld_place_section() to compare an input file path to 541 * entrance criteria ec_files file strings. 542 * 543 * We define a path in the usual Unix '/' separated manner, augmented 544 * with an optional archive member suffix enclosed in parenthesis: 545 * 546 * /dir/.../dir/basename(armember) 547 * 548 * The basename is the final path component, and includes the archive 549 * member, if present. The meaning of "object name" depends on whether or 550 * not the file comes from an archive or not. If not an archive, it is the 551 * same as the basename. If an archive, it is the name of the archive member 552 * from within the file. 553 * 554 * Variables of this type are initialized with ld_place_path_info_init(). 555 */ 556 typedef struct { 557 const char *ppi_path; /* Full path */ 558 const char *ppi_bname; /* basename(ppi_path) */ 559 const char *ppi_oname; /* object name: Not NULL terminated */ 560 Boolean ppi_isar; /* TRUE if path has archive member */ 561 size_t ppi_path_len; /* strlen(ppi_path) */ 562 size_t ppi_bname_len; /* strlen(ppi_bname) */ 563 size_t ppi_oname_len; /* strlen(ppi_oname) */ 564 } Place_path_info; 565 566 /* 567 * Local data items. 568 */ 569 extern char *Plibpath; 570 extern char *Llibdir; 571 extern char *Ulibdir; 572 extern Ld_heap *ld_heap; 573 extern APlist *lib_support; 574 extern int demangle_flag; 575 extern const Msg reject[]; 576 extern int Verbose; 577 extern const int ldynsym_symtype[]; 578 extern const int dynsymsort_symtype[]; 579 580 /* 581 * Local functions. 582 */ 583 extern char *add_string(char *, char *); 584 extern const char *demangle(const char *); 585 586 extern void lds_atexit(Ofl_desc *, int); 587 588 extern void libld_free(void *); 589 extern void *libld_malloc(size_t); 590 extern void *libld_realloc(void *, size_t); 591 592 extern int isdavl_compare(const void *, const void *); 593 594 extern Sdf_desc *sdf_add(const char *, APlist **); 595 extern Sdf_desc *sdf_find(const char *, APlist *); 596 597 #if defined(_ELF64) 598 599 #define ld_add_actrel ld64_add_actrel 600 #define ld_add_libdir ld64_add_libdir 601 #define ld_add_rel_cache ld64_add_rel_cache 602 #define ld_adj_movereloc ld64_adj_movereloc 603 #define ld_am_I_partial ld64_am_I_partial 604 #define ld_ar_member ld64_ar_member 605 #define ld_ar_setup ld64_ar_setup 606 #define ld_assign_got_TLS ld64_assign_got_TLS 607 #define ld_bswap_Word ld64_bswap_Word 608 #define ld_bswap_Xword ld64_bswap_Xword 609 #define ld_disp_errmsg ld64_disp_errmsg 610 #define ld_ent_check ld64_ent_check 611 #define ld_ent_lookup ld64_ent_lookup 612 #define ld_exit ld64_exit 613 #define ld_find_library ld64_find_library 614 #define ld_finish_libs ld64_finish_libs 615 #define ld_get_group ld64_get_group 616 #define ld_group_process ld64_group_process 617 #define ld_lib_setup ld64_lib_setup 618 #define ld_init_sighandler ld64_init_sighandler 619 #define ld_lcm ld64_lcm 620 #define ld_make_bss ld64_make_bss 621 #define ld_make_data ld64_make_data 622 #define ld_make_got ld64_make_got 623 #define ld_make_parexpn_data ld64_make_parexpn_data 624 #define ld_make_sunwmove ld64_make_sunmove 625 #define ld_make_text ld64_make_text 626 #define ld_map_out ld64_map_out 627 #define ld_map_parse ld64_map_parse 628 #define ld_map_post_process ld64_map_post_process 629 #define ld_open_outfile ld64_open_outfile 630 #define ld_os_first_isdesc ld64_os_first_isdesc 631 #define ld_place_path_info_init ld64_place_path_info_init 632 #define ld_place_section ld64_place_section 633 #define ld_process_archive ld64_process_archive 634 #define ld_process_files ld64_process_files 635 #define ld_process_flags ld64_process_flags 636 #define ld_process_ifl ld64_process_ifl 637 #define ld_process_move ld64_process_move 638 #define ld_process_open ld64_process_open 639 #define ld_process_ordered ld64_process_ordered 640 #define ld_process_sym_reloc ld64_process_sym_reloc 641 #define ld_reloc_GOT_relative ld64_reloc_GOT_relative 642 #define ld_reloc_plt ld64_reloc_plt 643 #define ld_reloc_remain_entry ld64_reloc_remain_entry 644 #define ld_reloc_targval_get ld64_reloc_targval_get 645 #define ld_reloc_targval_set ld64_reloc_targval_set 646 #define ld_sec_validate ld64_sec_validate 647 #define ld_seg_lookup ld64_seg_lookup 648 #define ld_sort_ordered ld64_sort_ordered 649 #define ld_stt_section_sym_name ld64_stt_section_sym_name 650 #define ld_sunw_ldmach ld64_sunw_ldmach 651 #define ld_sup_atexit ld64_sup_atexit 652 #define ld_sup_open ld64_sup_open 653 #define ld_sup_file ld64_sup_file 654 #define ld_sup_loadso ld64_sup_loadso 655 #define ld_sup_input_done ld64_sup_input_done 656 #define ld_sup_input_section ld64_sup_input_section 657 #define ld_sup_section ld64_sup_section 658 #define ld_sup_start ld64_sup_start 659 #define ld_swap_reloc_data ld64_swap_reloc_data 660 #define ld_sym_add_u ld64_sym_add_u 661 #define ld_sym_adjust_vis ld64_sym_adjust_vis 662 #define ld_sym_avl_comp ld64_sym_avl_comp 663 #define ld_sym_copy ld64_sym_copy 664 #define ld_sym_enter ld64_sym_enter 665 #define ld_sym_find ld64_sym_find 666 #define ld_sym_nodirect ld64_sym_nodirect 667 #define ld_sym_process ld64_sym_process 668 #define ld_sym_resolve ld64_sym_resolve 669 #define ld_sym_spec ld64_sym_spec 670 #define ld_targ ld64_targ 671 #define ld_targ_init_sparc ld64_targ_init_sparc 672 #define ld_targ_init_x86 ld64_targ_init_x86 673 #define ld_unwind_make_hdr ld64_unwind_make_hdr 674 #define ld_unwind_populate_hdr ld64_unwind_populate_hdr 675 #define ld_unwind_register ld64_unwind_register 676 #define ld_vers_base ld64_vers_base 677 #define ld_vers_check_defs ld64_vers_check_defs 678 #define ld_vers_check_need ld64_vers_check_need 679 #define ld_vers_def_process ld64_vers_def_process 680 #define ld_vers_desc ld64_vers_desc 681 #define ld_vers_find ld64_vers_find 682 #define ld_vers_need_process ld64_vers_need_process 683 #define ld_vers_promote ld64_vers_promote 684 #define ld_vers_sym_process ld64_vers_sym_process 685 #define ld_vers_verify ld64_vers_verify 686 #define ld_wrap_enter ld64_wrap_enter 687 688 #else 689 690 #define ld_add_actrel ld32_add_actrel 691 #define ld_add_libdir ld32_add_libdir 692 #define ld_add_rel_cache ld32_add_rel_cache 693 #define ld_adj_movereloc ld32_adj_movereloc 694 #define ld_am_I_partial ld32_am_I_partial 695 #define ld_ar_member ld32_ar_member 696 #define ld_ar_setup ld32_ar_setup 697 #define ld_assign_got_TLS ld32_assign_got_TLS 698 #define ld_bswap_Word ld32_bswap_Word 699 #define ld_bswap_Xword ld32_bswap_Xword 700 #define ld_disp_errmsg ld32_disp_errmsg 701 #define ld_ent_check ld32_ent_check 702 #define ld_ent_lookup ld32_ent_lookup 703 #define ld_exit ld32_exit 704 #define ld_find_library ld32_find_library 705 #define ld_finish_libs ld32_finish_libs 706 #define ld_get_group ld32_get_group 707 #define ld_group_process ld32_group_process 708 #define ld_lib_setup ld32_lib_setup 709 #define ld_init_sighandler ld32_init_sighandler 710 #define ld_lcm ld32_lcm 711 #define ld_make_bss ld32_make_bss 712 #define ld_make_data ld32_make_data 713 #define ld_make_got ld32_make_got 714 #define ld_make_parexpn_data ld32_make_parexpn_data 715 #define ld_make_sunwmove ld32_make_sunmove 716 #define ld_make_text ld32_make_text 717 #define ld_map_out ld32_map_out 718 #define ld_map_parse ld32_map_parse 719 #define ld_map_post_process ld32_map_post_process 720 #define ld_open_outfile ld32_open_outfile 721 #define ld_os_first_isdesc ld32_os_first_isdesc 722 #define ld_place_path_info_init ld32_place_path_info_init 723 #define ld_place_section ld32_place_section 724 #define ld_process_archive ld32_process_archive 725 #define ld_process_files ld32_process_files 726 #define ld_process_flags ld32_process_flags 727 #define ld_process_ifl ld32_process_ifl 728 #define ld_process_move ld32_process_move 729 #define ld_process_open ld32_process_open 730 #define ld_process_ordered ld32_process_ordered 731 #define ld_process_sym_reloc ld32_process_sym_reloc 732 #define ld_reloc_GOT_relative ld32_reloc_GOT_relative 733 #define ld_reloc_plt ld32_reloc_plt 734 #define ld_reloc_remain_entry ld32_reloc_remain_entry 735 #define ld_reloc_targval_get ld32_reloc_targval_get 736 #define ld_reloc_targval_set ld32_reloc_targval_set 737 #define ld_sec_validate ld32_sec_validate 738 #define ld_seg_lookup ld32_seg_lookup 739 #define ld_sort_ordered ld32_sort_ordered 740 #define ld_stt_section_sym_name ld32_stt_section_sym_name 741 #define ld_sunw_ldmach ld32_sunw_ldmach 742 #define ld_sup_atexit ld32_sup_atexit 743 #define ld_sup_open ld32_sup_open 744 #define ld_sup_file ld32_sup_file 745 #define ld_sup_loadso ld32_sup_loadso 746 #define ld_sup_input_done ld32_sup_input_done 747 #define ld_sup_input_section ld32_sup_input_section 748 #define ld_sup_section ld32_sup_section 749 #define ld_sup_start ld32_sup_start 750 #define ld_swap_reloc_data ld32_swap_reloc_data 751 #define ld_sym_add_u ld32_sym_add_u 752 #define ld_sym_adjust_vis ld32_sym_adjust_vis 753 #define ld_sym_avl_comp ld32_sym_avl_comp 754 #define ld_sym_copy ld32_sym_copy 755 #define ld_sym_enter ld32_sym_enter 756 #define ld_sym_find ld32_sym_find 757 #define ld_sym_nodirect ld32_sym_nodirect 758 #define ld_sym_process ld32_sym_process 759 #define ld_sym_resolve ld32_sym_resolve 760 #define ld_sym_spec ld32_sym_spec 761 #define ld_targ ld32_targ 762 #define ld_targ_init_sparc ld32_targ_init_sparc 763 #define ld_targ_init_x86 ld32_targ_init_x86 764 #define ld_unwind_make_hdr ld32_unwind_make_hdr 765 #define ld_unwind_populate_hdr ld32_unwind_populate_hdr 766 #define ld_unwind_register ld32_unwind_register 767 #define ld_vers_base ld32_vers_base 768 #define ld_vers_check_defs ld32_vers_check_defs 769 #define ld_vers_check_need ld32_vers_check_need 770 #define ld_vers_def_process ld32_vers_def_process 771 #define ld_vers_desc ld32_vers_desc 772 #define ld_vers_find ld32_vers_find 773 #define ld_vers_need_process ld32_vers_need_process 774 #define ld_vers_promote ld32_vers_promote 775 #define ld_vers_sym_process ld32_vers_sym_process 776 #define ld_vers_verify ld32_vers_verify 777 #define ld_wrap_enter ld32_wrap_enter 778 779 #endif 780 781 extern void dbg_cleanup(void); 782 extern int dbg_setup(Ofl_desc *, const char *, int); 783 784 extern uintptr_t ld_add_actrel(Word, Rel_desc *, Ofl_desc *); 785 extern uintptr_t ld_add_libdir(Ofl_desc *, const char *); 786 extern Rel_cache *ld_add_rel_cache(Ofl_desc *, APlist **, size_t *, 787 size_t, size_t); 788 extern void ld_adj_movereloc(Ofl_desc *, Rel_desc *); 789 extern Sym_desc * ld_am_I_partial(Rel_desc *, Xword); 790 extern void ld_ar_member(Ar_desc *, Elf_Arsym *, Ar_aux *, 791 Ar_mem *); 792 extern Ar_desc *ld_ar_setup(const char *, Elf *, Ofl_desc *); 793 extern uintptr_t ld_assign_got_TLS(Boolean, Rel_desc *, Ofl_desc *, 794 Sym_desc *, Gotndx *, Gotref, Word, Word, 795 Word, Word); 796 797 extern Word ld_bswap_Word(Word); 798 extern Xword ld_bswap_Xword(Xword); 799 800 extern void ld_disp_errmsg(const char *, Rel_desc *, Ofl_desc *); 801 802 extern void ld_ent_check(Ofl_desc *); 803 extern Ent_desc *ld_ent_lookup(Ofl_desc *, const char *name, 804 avl_index_t *where); 805 extern int ld_exit(Ofl_desc *); 806 807 extern uintptr_t ld_find_library(const char *, Ofl_desc *); 808 extern uintptr_t ld_finish_libs(Ofl_desc *); 809 810 extern const char *ld_stt_section_sym_name(Is_desc *); 811 812 extern Group_desc *ld_get_group(Ofl_desc *, Is_desc *); 813 extern uintptr_t ld_group_process(Is_desc *, Ofl_desc *); 814 815 extern uintptr_t ld_lib_setup(Ofl_desc *); 816 817 extern void ld_init_sighandler(Ofl_desc *); 818 819 extern Xword ld_lcm(Xword, Xword); 820 821 extern uintptr_t ld_make_bss(Ofl_desc *, Xword, Xword, uint_t); 822 extern Is_desc *ld_make_data(Ofl_desc *, size_t); 823 extern uintptr_t ld_make_got(Ofl_desc *); 824 extern uintptr_t ld_make_parexpn_data(Ofl_desc *, size_t, Xword); 825 extern uintptr_t ld_make_sunwmove(Ofl_desc *, int); 826 extern Is_desc *ld_make_text(Ofl_desc *, size_t); 827 extern void ld_map_out(Ofl_desc *); 828 extern Boolean ld_map_parse(const char *, Ofl_desc *); 829 extern Boolean ld_map_post_process(Ofl_desc *); 830 831 extern uintptr_t ld_open_outfile(Ofl_desc *); 832 833 extern Is_desc *ld_os_first_isdesc(Os_desc *); 834 extern Place_path_info *ld_place_path_info_init(Ofl_desc *, Ifl_desc *, 835 Place_path_info *); 836 extern Os_desc *ld_place_section(Ofl_desc *, Is_desc *, 837 Place_path_info *path_info, int, const char *); 838 extern uintptr_t ld_process_archive(const char *, int, Ar_desc *, 839 Ofl_desc *); 840 extern uintptr_t ld_process_files(Ofl_desc *, int, char **); 841 extern uintptr_t ld_process_flags(Ofl_desc *, int, char **); 842 extern Ifl_desc *ld_process_ifl(const char *, const char *, int, Elf *, 843 Word, Ofl_desc *, Rej_desc *); 844 extern uintptr_t ld_process_move(Ofl_desc *); 845 extern Ifl_desc *ld_process_open(const char *, const char *, int *, 846 Ofl_desc *, Word, Rej_desc *); 847 extern uintptr_t ld_process_ordered(Ofl_desc *, Ifl_desc *, 848 Place_path_info *path_info, Word); 849 extern uintptr_t ld_process_sym_reloc(Ofl_desc *, Rel_desc *, Rel *, 850 Is_desc *, const char *, Word); 851 852 extern uintptr_t ld_reloc_GOT_relative(Boolean, Rel_desc *, Ofl_desc *); 853 extern uintptr_t ld_reloc_plt(Rel_desc *, Ofl_desc *); 854 extern void ld_reloc_remain_entry(Rel_desc *, Os_desc *, 855 Ofl_desc *); 856 extern int ld_reloc_targval_get(Ofl_desc *, Rel_desc *, 857 uchar_t *, Xword *); 858 extern int ld_reloc_targval_set(Ofl_desc *, Rel_desc *, 859 uchar_t *, Xword); 860 861 extern Sg_desc *ld_seg_lookup(Ofl_desc *, const char *, 862 avl_index_t *where); 863 extern void ld_sec_validate(Ofl_desc *); 864 extern uintptr_t ld_sort_ordered(Ofl_desc *); 865 extern Half ld_sunw_ldmach(); 866 extern void ld_sup_atexit(Ofl_desc *, int); 867 extern void ld_sup_open(Ofl_desc *, const char **, const char **, 868 int *, int, Elf **, Elf *ref, size_t, 869 const Elf_Kind); 870 extern void ld_sup_file(Ofl_desc *, const char *, const Elf_Kind, 871 int flags, Elf *); 872 extern uintptr_t ld_sup_loadso(Ofl_desc *, const char *); 873 extern void ld_sup_input_done(Ofl_desc *); 874 extern void ld_sup_section(Ofl_desc *, const char *, Shdr *, Word, 875 Elf_Data *, Elf *); 876 extern uintptr_t ld_sup_input_section(Ofl_desc*, Ifl_desc *, 877 const char *, Shdr **, Word, Elf_Scn *, Elf *); 878 extern void ld_sup_start(Ofl_desc *, const Half, const char *); 879 extern int ld_swap_reloc_data(Ofl_desc *, Rel_desc *); 880 extern Sym_desc *ld_sym_add_u(const char *, Ofl_desc *, Msg); 881 extern void ld_sym_adjust_vis(Sym_desc *, Ofl_desc *); 882 extern int ld_sym_avl_comp(const void *, const void *); 883 extern uintptr_t ld_sym_copy(Sym_desc *); 884 extern Sym_desc *ld_sym_enter(const char *, Sym *, Word, Ifl_desc *, 885 Ofl_desc *, Word, Word, sd_flag_t, avl_index_t *); 886 extern Sym_desc *ld_sym_find(const char *, Word, avl_index_t *, 887 Ofl_desc *); 888 extern uintptr_t ld_sym_nodirect(Is_desc *, Ifl_desc *, Ofl_desc *); 889 extern uintptr_t ld_sym_process(Is_desc *, Ifl_desc *, Ofl_desc *); 890 extern uintptr_t ld_sym_resolve(Sym_desc *, Sym *, Ifl_desc *, 891 Ofl_desc *, int, Word, sd_flag_t); 892 extern uintptr_t ld_sym_spec(Ofl_desc *); 893 894 extern Target ld_targ; 895 extern const Target *ld_targ_init_sparc(void); 896 extern const Target *ld_targ_init_x86(void); 897 898 extern uintptr_t ld_unwind_make_hdr(Ofl_desc *); 899 extern uintptr_t ld_unwind_populate_hdr(Ofl_desc *); 900 extern uintptr_t ld_unwind_register(Os_desc *, Ofl_desc *); 901 902 extern Ver_desc *ld_vers_base(Ofl_desc *); 903 extern uintptr_t ld_vers_check_defs(Ofl_desc *); 904 extern uintptr_t ld_vers_check_need(Ofl_desc *); 905 extern uintptr_t ld_vers_def_process(Is_desc *, Ifl_desc *, Ofl_desc *); 906 extern Ver_desc *ld_vers_desc(const char *, Word, APlist **); 907 extern Ver_desc *ld_vers_find(const char *, Word, APlist *); 908 extern uintptr_t ld_vers_need_process(Is_desc *, Ifl_desc *, Ofl_desc *); 909 extern void ld_vers_promote(Sym_desc *, Word, Ifl_desc *, 910 Ofl_desc *); 911 extern int ld_vers_sym_process(Lm_list *, Is_desc *, Ifl_desc *); 912 extern int ld_vers_verify(Ofl_desc *); 913 extern WrapSymNode *ld_wrap_enter(Ofl_desc *, const char *); 914 915 extern uintptr_t add_regsym(Sym_desc *, Ofl_desc *); 916 extern Word hashbkts(Word); 917 extern Xword lcm(Xword, Xword); 918 919 /* 920 * Most platforms have both a 32 and 64-bit variant (e.g. EM_SPARC and 921 * EM_SPARCV9). To support this, there many files in libld that are built 922 * twice, once for ELFCLASS64 (_ELF64), and once for ELFCLASS32. In these 923 * files, we sometimes want to supply one value for the ELFCLASS32 case 924 * and another for ELFCLASS64. The LD_TARG_BYCLASS macro is used to do 925 * this. It is called with both both alternatives, and yields the one 926 * that applies to the current compilation environment. 927 */ 928 #ifdef _ELF64 929 #define LD_TARG_BYCLASS(_ec32, _ec64) (_ec64) 930 #else 931 #define LD_TARG_BYCLASS(_ec32, _ec64) (_ec32) 932 #endif 933 934 935 #ifdef __cplusplus 936 } 937 #endif 938 939 #endif /* _LIBLD_DOT_H */ 940