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 (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved. 27 */ 28 29 #ifndef _LIBLD_H 30 #define _LIBLD_H 31 32 #include <stdlib.h> 33 #include <libelf.h> 34 #include <sgs.h> 35 #include <_machelf.h> 36 #include <string_table.h> 37 #include <sys/avl.h> 38 #include <alist.h> 39 #include <elfcap.h> 40 41 #ifdef __cplusplus 42 extern "C" { 43 #endif 44 45 /* 46 * Default directory search path manipulation for the link-editor. YLDIR 47 * indicates which directory in LIBPATH is replaced by the -YL option to cc 48 * and ld. YUDIR indicates which directory is replaced by -YU. 49 */ 50 #define YLDIR 1 51 #define YUDIR 2 52 53 /* 54 * Define a hash value that can never be returned from elf_hash(). 55 */ 56 #define SYM_NOHASH (~(Word)0) 57 58 /* 59 * Macro that can be used to represent both ORDER flags 60 * in a section header. 61 */ 62 #define ALL_SHF_ORDER (SHF_ORDERED | SHF_LINK_ORDER) 63 64 /* 65 * The linker merges (concatenates) sections with the same name and 66 * compatible section header flags. When comparing these flags, 67 * there are some that should not be included in the decision. 68 * The ALL_SHF_IGNORE constant defines these flags. 69 * 70 * NOTE: SHF_MERGE|SHF_STRINGS: 71 * The compiler is allowed to set the SHF_MERGE|SHF_STRINGS flags in 72 * order to tell the linker that: 73 * 74 * 1) There is nothing in the section except null terminated strings. 75 * 2) Those strings do not contain NULL bytes, except as termination. 76 * 3) All references to these strings occur via standard relocation 77 * records. 78 * 79 * As a result, if two compatible sections both have these flags set, it is 80 * OK to combine the strings they contain into a single merged string table 81 * with duplicates removed and tail strings merged. 82 * 83 * This is a different meaning than the simple concatenating of sections 84 * that the linker always does. It is a hint that an additional optimization 85 * is possible, but not required. This means that sections that do not 86 * share the same SHF_MERGE|SHF_STRINGS values can be concatenated, 87 * but cannot have their duplicate strings combined. Hence, the 88 * SHF_MERGE|SHF_STRINGS flags should be ignored when deciding whether 89 * two sections can be concatenated. 90 */ 91 #define ALL_SHF_IGNORE (ALL_SHF_ORDER | SHF_GROUP | SHF_MERGE | SHF_STRINGS) 92 93 /* 94 * Define symbol reference types for use in symbol resolution. 95 */ 96 typedef enum { 97 REF_DYN_SEEN, /* a .so symbol has been seen */ 98 REF_DYN_NEED, /* a .so symbol satisfies a .o symbol */ 99 REF_REL_NEED, /* a .o symbol */ 100 REF_NUM /* the number of symbol references */ 101 } Symref; 102 103 /* 104 * Relocation descriptor cache 105 */ 106 struct rel_cache { 107 APlist *rc_list; /* list of Rel_cachebuf */ 108 Word rc_cnt; /* and count */ 109 }; 110 111 /* 112 * GOT reference models 113 */ 114 typedef enum { 115 GOT_REF_GENERIC, /* generic symbol reference */ 116 GOT_REF_TLSIE, /* TLS initial exec (gnu) reference */ 117 GOT_REF_TLSLD, /* TLS local dynamic reference */ 118 GOT_REF_TLSGD /* TLS general dynamic reference */ 119 } Gotref; 120 121 typedef struct { 122 Xword gn_addend; /* addend associated with GOT entry */ 123 Sword gn_gotndx; /* GOT table index */ 124 Gotref gn_gotref; 125 } Gotndx; 126 127 /* 128 * Got debugging structure. The got index is defined as a signed value as we 129 * do so much mucking around with negative and positive gots on SPARC, and sign 130 * extension is necessary when building 64-bit objects. On intel we explicitly 131 * cast this variable to an unsigned value. 132 */ 133 typedef struct { 134 Sym_desc *gt_sym; 135 Gotndx gt_gndx; 136 } Gottable; 137 138 /* 139 * The link-editor caches the results of sloppy relocation processing 140 * in a variable of type Rlxrel_cache. Symbols come for processing in sorted 141 * order, so a single item cache suffices to eliminate duplicate lookups. 142 * 143 * When sloppy relocation processing fails, the Rlxrel_rej enum reports 144 * the underlying reason. 145 */ 146 typedef enum { 147 RLXREL_REJ_NONE = 0, /* Replacement symbol was found */ 148 RLXREL_REJ_TARGET, /* Target sec disallows relaxed relocations */ 149 RLXREL_REJ_SECTION, /* Either there is no replacement section, */ 150 /* or its attributes are incompatible */ 151 RLXREL_REJ_SYMBOL, /* Replacement symbol not found */ 152 } Rlxrel_rej; 153 154 typedef struct sreloc_cache { 155 Sym_desc *sr_osdp; /* Original symbol */ 156 Sym_desc *sr_rsdp; /* Replacement symbol */ 157 Rlxrel_rej sr_rej; /* Reason for failure if NULL sr_rsdp */ 158 } Rlxrel_cache; 159 160 /* 161 * Nodes in an ofl_wrap AVL tree 162 * 163 * wsn_name is the name of the symbol to be wrapped. wsn_wrapname is used 164 * when we need to refer to the wrap symbol, and consists of the symbol 165 * name with a __wrap_ prefix. 166 */ 167 typedef struct wrap_sym_node { 168 avl_node_t wsn_avlnode; /* AVL book-keeping */ 169 const char *wsn_name; /* Symbol name: XXX */ 170 const char *wsn_wrapname; /* Wrap symbol name: __wrap_XXX */ 171 } WrapSymNode; 172 173 /* 174 * Capabilities structures, used to maintain a capabilities set. 175 * 176 * Capabilities can be defined within input relocatable objects, and can be 177 * augmented or replaced by mapfile directives. In addition, mapfile directives 178 * can be used to exclude capabilities that would otherwise be carried over to 179 * the output object. 180 * 181 * CA_SUNW_HW_1, CA_SUNW_SF_1 and CA_SUNW_HW_2 values are bitmasks. A current 182 * value, and an exclude value are maintained for each capability. 183 * 184 * There can be multiple CA_SUNW_PLAT and CA_SUNW_MACH entries and thus Alists 185 * are used to collect these entries. A current list for each capability is 186 * maintained as Capstr entries, which provide for maintaining the strings 187 * eventual index into a string table. An exclude list is maintained as a 188 * list of string pointers. 189 */ 190 typedef struct { 191 elfcap_mask_t cm_val; /* bitmask value */ 192 elfcap_mask_t cm_exc; /* bits to exclude from final object */ 193 } Capmask; 194 195 typedef struct { 196 Alist *cl_val; /* string (Capstr) value */ 197 APlist *cl_exc; /* strings to exclude from final */ 198 } Caplist; /* object */ 199 200 typedef struct { 201 char *cs_str; /* platform or machine name */ 202 Word cs_ndx; /* the entries output Cap index */ 203 } Capstr; 204 205 typedef uint_t oc_flag_t; 206 typedef struct { 207 Capmask oc_hw_1; /* CA_SUNW_HW_1 capabilities */ 208 Capmask oc_sf_1; /* CA_SUNW_SF_1 capabilities */ 209 Capmask oc_hw_2; /* CA_SUNW_HW_2 capabilities */ 210 Caplist oc_plat; /* CA_SUNW_PLAT capabilities */ 211 Caplist oc_mach; /* CA_SUNW_MACH capabilities */ 212 Capstr oc_id; /* CA_SUNW_ID capability */ 213 oc_flag_t oc_flags; 214 } Objcapset; 215 216 #define FLG_OCS_USRDEFID 0x1 /* user defined CA_SUNW_ID */ 217 218 /* 219 * Bitmasks for a single capability. Capabilities come from input objects, 220 * augmented or replaced by mapfile directives. In addition, mapfile directives 221 * can be used to exclude bits that would otherwise be set in the output object. 222 */ 223 typedef struct { 224 elfcap_mask_t cm_value; /* Bitmask value */ 225 elfcap_mask_t cm_exclude; /* Bits to remove from final object */ 226 } CapMask; 227 228 /* 229 * Combine the bitmask in a CapMask with the exclusion mask and 230 * return the resulting final value. 231 */ 232 #define CAPMASK_VALUE(_cbmp) ((_cbmp)->cm_value & ~(_cbmp)->cm_exclude) 233 234 typedef struct { 235 CapMask c_hw_1; /* CA_SUNW_HW_1 capabilities */ 236 CapMask c_sf_1; /* CA_SUNW_SF_1 capabilities */ 237 CapMask c_hw_2; /* CA_SUNW_HW_2 capabilities */ 238 } Outcapset; 239 240 241 /* 242 * Output file processing structure 243 */ 244 typedef Lword ofl_flag_t; 245 typedef Word ofl_guideflag_t; 246 struct ofl_desc { 247 char *ofl_sgsid; /* link-editor identification */ 248 const char *ofl_name; /* full file name */ 249 Elf *ofl_elf; /* elf_memory() elf descriptor */ 250 Elf *ofl_welf; /* ELF_C_WRITE elf descriptor */ 251 Ehdr *ofl_dehdr; /* default elf header, and new elf */ 252 Ehdr *ofl_nehdr; /* header describing this file */ 253 Phdr *ofl_phdr; /* program header descriptor */ 254 Phdr *ofl_tlsphdr; /* TLS phdr */ 255 int ofl_fd; /* file descriptor */ 256 size_t ofl_size; /* image size */ 257 APlist *ofl_maps; /* list of input mapfiles */ 258 APlist *ofl_segs; /* list of segments */ 259 APlist *ofl_segs_order; /* SEGMENT_ORDER segments */ 260 avl_tree_t ofl_segs_avl; /* O(log N) access to named segments */ 261 APlist *ofl_ents; /* list of entrance descriptors */ 262 avl_tree_t ofl_ents_avl; /* O(log N) access to named ent. desc */ 263 APlist *ofl_objs; /* relocatable object file list */ 264 Word ofl_objscnt; /* and count */ 265 APlist *ofl_ars; /* archive library list */ 266 Word ofl_arscnt; /* and count */ 267 int ofl_ars_gsandx; /* archive group argv index. 0 means */ 268 /* no current group, < 0 means */ 269 /* error reported. >0 is cur ndx */ 270 Word ofl_ars_gsndx; /* current -zrescan-start ofl_ars ndx */ 271 APlist *ofl_sos; /* shared object list */ 272 Word ofl_soscnt; /* and count */ 273 APlist *ofl_soneed; /* list of implicitly required .so's */ 274 APlist *ofl_socntl; /* list of .so control definitions */ 275 Rel_cache ofl_outrels; /* list of output relocations */ 276 Rel_cache ofl_actrels; /* list of relocations to perform */ 277 APlist *ofl_relaux; /* Rel_aux cache for outrels/actrels */ 278 Word ofl_entrelscnt; /* no of relocations entered */ 279 Alist *ofl_copyrels; /* list of copy relocations */ 280 APlist *ofl_ordered; /* list of shf_ordered sections */ 281 APlist *ofl_symdtent; /* list of syminfo symbols that need */ 282 /* to reference .dynamic entries */ 283 APlist *ofl_ismove; /* list of .SUNW_move sections */ 284 APlist *ofl_ismoverel; /* list of relocation input section */ 285 /* targeting to expanded area */ 286 APlist *ofl_parsyms; /* list of partially initialized */ 287 /* symbols (ie. move symbols) */ 288 APlist *ofl_extrarels; /* relocation sections which have */ 289 /* a NULL sh_info */ 290 avl_tree_t *ofl_groups; /* pointer to head of Groups AVL tree */ 291 APlist *ofl_initarray; /* list of init array func names */ 292 APlist *ofl_finiarray; /* list of fini array func names */ 293 APlist *ofl_preiarray; /* list of preinit array func names */ 294 APlist *ofl_rtldinfo; /* list of rtldinfo syms */ 295 APlist *ofl_osgroups; /* list of output GROUP sections */ 296 APlist *ofl_ostlsseg; /* pointer to sections in TLS segment */ 297 APlist *ofl_unwind; /* list of unwind output sections */ 298 Os_desc *ofl_unwindhdr; /* Unwind hdr */ 299 avl_tree_t ofl_symavl; /* pointer to head of Syms AVL tree */ 300 Sym_desc **ofl_regsyms; /* array of potential register */ 301 Word ofl_regsymsno; /* symbols and array count */ 302 Word ofl_regsymcnt; /* no. of output register symbols */ 303 Word ofl_lregsymcnt; /* no. of local register symbols */ 304 Sym_desc *ofl_dtracesym; /* ld -zdtrace= */ 305 ofl_flag_t ofl_flags; /* various state bits, args etc. */ 306 ofl_flag_t ofl_flags1; /* more flags */ 307 void *ofl_entry; /* entry point (-e and Sym_desc *) */ 308 char *ofl_filtees; /* shared objects we are a filter for */ 309 const char *ofl_soname; /* (-h option) output file name for */ 310 /* dynamic structure */ 311 const char *ofl_interp; /* interpreter name used by exec() */ 312 char *ofl_rpath; /* run path to store in .dynamic */ 313 char *ofl_config; /* config path to store in .dynamic */ 314 APlist *ofl_ulibdirs; /* user supplied library search list */ 315 APlist *ofl_dlibdirs; /* default library search list */ 316 Word ofl_vercnt; /* number of versions to generate */ 317 APlist *ofl_verdesc; /* list of version descriptors */ 318 size_t ofl_verdefsz; /* size of version definition section */ 319 size_t ofl_verneedsz; /* size of version needed section */ 320 Word ofl_entercnt; /* no. of global symbols entered */ 321 Word ofl_globcnt; /* no. of global symbols to output */ 322 Word ofl_scopecnt; /* no. of scoped symbols to output */ 323 Word ofl_dynscopecnt; /* no. scoped syms in .SUNW_ldynsym */ 324 Word ofl_elimcnt; /* no. of eliminated symbols */ 325 Word ofl_locscnt; /* no. of local symbols in .symtab */ 326 Word ofl_dynlocscnt; /* no. local symbols in .SUNW_ldynsym */ 327 Word ofl_dynsymsortcnt; /* no. ndx in .SUNW_dynsymsort */ 328 Word ofl_dyntlssortcnt; /* no. ndx in .SUNW_dyntlssort */ 329 Word ofl_dynshdrcnt; /* no. of output section in .dynsym */ 330 Word ofl_shdrcnt; /* no. of output sections */ 331 Word ofl_caploclcnt; /* no. of local capabilities symbols */ 332 Word ofl_capsymcnt; /* no. of symbol capabilities entries */ 333 /* required */ 334 Word ofl_capchaincnt; /* no. of Capchain symbols */ 335 APlist *ofl_capgroups; /* list of capabilities groups */ 336 avl_tree_t *ofl_capfamilies; /* capability family AVL tree */ 337 Str_tbl *ofl_shdrsttab; /* Str_tbl for shdr strtab */ 338 Str_tbl *ofl_strtab; /* Str_tbl for symtab strtab */ 339 Str_tbl *ofl_dynstrtab; /* Str_tbl for dymsym strtab */ 340 Gotndx *ofl_tlsldgotndx; /* index to LD TLS_index structure */ 341 Xword ofl_relocsz; /* size of output relocations */ 342 Xword ofl_relocgotsz; /* size of .got relocations */ 343 Xword ofl_relocpltsz; /* size of .plt relocations */ 344 Xword ofl_relocbsssz; /* size of .bss (copy) relocations */ 345 Xword ofl_relocrelsz; /* size of .rel[a] relocations */ 346 Word ofl_relocincnt; /* no. of input relocations */ 347 Word ofl_reloccnt; /* tot number of output relocations */ 348 Word ofl_reloccntsub; /* tot numb of output relocations to */ 349 /* skip (-zignore) */ 350 Word ofl_relocrelcnt; /* tot number of relative */ 351 /* relocations */ 352 Word ofl_gotcnt; /* no. of .got entries */ 353 Word ofl_pltcnt; /* no. of .plt entries */ 354 Word ofl_pltpad; /* no. of .plt padd entries */ 355 Word ofl_hashbkts; /* no. of hash buckets required */ 356 Is_desc *ofl_isbss; /* .bss input section (globals) */ 357 Is_desc *ofl_islbss; /* .lbss input section (globals) */ 358 Is_desc *ofl_istlsbss; /* .tlsbss input section (globals) */ 359 Is_desc *ofl_isparexpn; /* -z nopartial .data input section */ 360 Os_desc *ofl_osdynamic; /* .dynamic output section */ 361 Os_desc *ofl_osdynsym; /* .dynsym output section */ 362 Os_desc *ofl_osldynsym; /* .SUNW_ldynsym output section */ 363 Os_desc *ofl_osdynstr; /* .dynstr output section */ 364 Os_desc *ofl_osdynsymsort; /* .SUNW_dynsymsort output section */ 365 Os_desc *ofl_osdyntlssort; /* .SUNW_dyntlssort output section */ 366 Os_desc *ofl_osgot; /* .got output section */ 367 Os_desc *ofl_oshash; /* .hash output section */ 368 Os_desc *ofl_osinitarray; /* .init_array output section */ 369 Os_desc *ofl_osfiniarray; /* .fini_array output section */ 370 Os_desc *ofl_ospreinitarray; /* .preinit_array output section */ 371 Os_desc *ofl_osinterp; /* .interp output section */ 372 Os_desc *ofl_oscap; /* .SUNW_cap output section */ 373 Os_desc *ofl_oscapinfo; /* .SUNW_capinfo output section */ 374 Os_desc *ofl_oscapchain; /* .SUNW_capchain output section */ 375 Os_desc *ofl_osplt; /* .plt output section */ 376 Os_desc *ofl_osmove; /* .SUNW_move output section */ 377 Os_desc *ofl_osrelhead; /* first relocation section */ 378 Os_desc *ofl_osrel; /* .rel[a] relocation section */ 379 Os_desc *ofl_osshstrtab; /* .shstrtab output section */ 380 Os_desc *ofl_osstrtab; /* .strtab output section */ 381 Os_desc *ofl_ossymtab; /* .symtab output section */ 382 Os_desc *ofl_ossymshndx; /* .symtab_shndx output section */ 383 Os_desc *ofl_osdynshndx; /* .dynsym_shndx output section */ 384 Os_desc *ofl_osldynshndx; /* .SUNW_ldynsym_shndx output sec */ 385 Os_desc *ofl_osverdef; /* .version definition output section */ 386 Os_desc *ofl_osverneed; /* .version needed output section */ 387 Os_desc *ofl_osversym; /* .version symbol ndx output section */ 388 Word ofl_dtflags_1; /* DT_FLAGS_1 entries */ 389 Word ofl_dtflags; /* DT_FLAGS entries */ 390 Os_desc *ofl_ossyminfo; /* .SUNW_syminfo output section */ 391 Half ofl_parexpnndx; /* -z nopartial section index */ 392 /* Ref. at perform_outreloc() in */ 393 /* libld/{mach}/machrel.c */ 394 Xword *ofl_checksum; /* DT_CHECKSUM value address */ 395 char *ofl_depaudit; /* dependency auditing required (-P) */ 396 char *ofl_audit; /* object auditing required (-p) */ 397 Alist *ofl_symfltrs; /* per-symbol filtees and their */ 398 Alist *ofl_dtsfltrs; /* associated .dynamic/.dynstrs */ 399 Objcapset ofl_ocapset; /* object capabilities */ 400 Lm_list *ofl_lml; /* runtime link-map list */ 401 Gottable *ofl_gottable; /* debugging got information */ 402 Rlxrel_cache ofl_sr_cache; /* Cache last result from */ 403 /* sloppy_comdat_reloc() */ 404 APlist *ofl_maptext; /* mapfile added text sections */ 405 APlist *ofl_mapdata; /* mapfile added data sections */ 406 avl_tree_t *ofl_wrap; /* -z wrap symbols */ 407 ofl_guideflag_t ofl_guideflags; /* -z guide flags */ 408 APlist *ofl_assdeflib; /* -z assert-deflib exceptions */ 409 }; 410 411 #define FLG_OF_DYNAMIC 0x00000001 /* generate dynamic output module */ 412 #define FLG_OF_STATIC 0x00000002 /* generate static output module */ 413 #define FLG_OF_EXEC 0x00000004 /* generate an executable */ 414 #define FLG_OF_RELOBJ 0x00000008 /* generate a relocatable object */ 415 #define FLG_OF_SHAROBJ 0x00000010 /* generate a shared object */ 416 #define FLG_OF_BFLAG 0x00000020 /* do no special plt building: -b */ 417 #define FLG_OF_IGNENV 0x00000040 /* ignore LD_LIBRARY_PATH: -i */ 418 #define FLG_OF_STRIP 0x00000080 /* strip output: -s */ 419 #define FLG_OF_NOWARN 0x00000100 /* disable symbol warnings: -t */ 420 #define FLG_OF_NOUNDEF 0x00000200 /* allow no undefined symbols: -zdefs */ 421 #define FLG_OF_PURETXT 0x00000400 /* allow no text relocations: -ztext */ 422 #define FLG_OF_GENMAP 0x00000800 /* generate a memory map: -m */ 423 #define FLG_OF_DYNLIBS 0x00001000 /* dynamic input allowed: -Bdynamic */ 424 #define FLG_OF_SYMBOLIC 0x00002000 /* bind global symbols: -Bsymbolic */ 425 #define FLG_OF_ADDVERS 0x00004000 /* add version stamp: -Qy */ 426 #define FLG_OF_NOLDYNSYM 0x00008000 /* -znoldynsym set */ 427 #define FLG_OF_IS_ORDER 0x00010000 /* input section ordering within a */ 428 /* segment is required */ 429 #define FLG_OF_EC_FILES 0x00020000 /* Ent_desc exist w/non-NULL ec_files */ 430 #define FLG_OF_TEXTREL 0x00040000 /* text relocations have been found */ 431 #define FLG_OF_MULDEFS 0x00080000 /* multiple symbols are allowed */ 432 #define FLG_OF_TLSPHDR 0x00100000 /* a TLS program header is required */ 433 #define FLG_OF_BLDGOT 0x00200000 /* build GOT table */ 434 #define FLG_OF_VERDEF 0x00400000 /* record version definitions */ 435 #define FLG_OF_VERNEED 0x00800000 /* record version dependencies */ 436 #define FLG_OF_NOVERSEC 0x01000000 /* don't record version sections */ 437 #define FLG_OF_KEY 0x02000000 /* file requires sort keys */ 438 #define FLG_OF_PROCRED 0x04000000 /* process any symbol reductions by */ 439 /* effecting the symbol table */ 440 /* output and relocations */ 441 #define FLG_OF_SYMINFO 0x08000000 /* create a syminfo section */ 442 #define FLG_OF_AUX 0x10000000 /* ofl_filter is an auxiliary filter */ 443 #define FLG_OF_FATAL 0x20000000 /* fatal error during input */ 444 #define FLG_OF_WARN 0x40000000 /* warning during input processing. */ 445 #define FLG_OF_VERBOSE 0x80000000 /* -z verbose flag set */ 446 447 #define FLG_OF_MAPSYMB 0x000100000000 /* symbolic scope definition seen */ 448 #define FLG_OF_MAPGLOB 0x000200000000 /* global scope definition seen */ 449 #define FLG_OF_COMREL 0x000400000000 /* -z combreloc set, which enables */ 450 /* DT_RELACNT tracking, */ 451 #define FLG_OF_NOCOMREL 0x000800000000 /* -z nocombreloc set */ 452 #define FLG_OF_AUTOLCL 0x001000000000 /* automatically reduce unspecified */ 453 /* global symbols to locals */ 454 #define FLG_OF_AUTOELM 0x002000000000 /* automatically eliminate */ 455 /* unspecified global symbols */ 456 #define FLG_OF_REDLSYM 0x004000000000 /* reduce local symbols */ 457 #define FLG_OF_OS_ORDER 0x008000000000 /* output section ordering required */ 458 #define FLG_OF_OSABI 0x010000000000 /* tag object as ELFOSABI_SOLARIS */ 459 #define FLG_OF_ADJOSCNT 0x020000000000 /* adjust ofl_shdrcnt to accommodate */ 460 /* discarded sections */ 461 #define FLG_OF_OTOSCAP 0x040000000000 /* convert object capabilities to */ 462 /* symbol capabilities */ 463 #define FLG_OF_PTCAP 0x080000000000 /* PT_SUNWCAP required */ 464 #define FLG_OF_CAPSTRS 0x100000000000 /* capability strings are required */ 465 #define FLG_OF_EHFRAME 0x200000000000 /* output contains .eh_frame section */ 466 #define FLG_OF_FATWARN 0x400000000000 /* make warnings fatal */ 467 #define FLG_OF_ADEFLIB 0x800000000000 /* no libraries in default path */ 468 469 /* 470 * In the flags1 arena, establish any options that are applicable to archive 471 * extraction first, and associate a mask. These values are recorded with any 472 * archive descriptor so that they may be reset should the archive require a 473 * rescan to try and resolve undefined symbols. 474 */ 475 #define FLG_OF1_ALLEXRT 0x0000000001 /* extract all members from an */ 476 /* archive file */ 477 #define FLG_OF1_WEAKEXT 0x0000000002 /* allow archive extraction to */ 478 /* resolve weak references */ 479 #define MSK_OF1_ARCHIVE 0x0000000003 /* archive flags mask */ 480 481 #define FLG_OF1_NOINTRP 0x0000000008 /* -z nointerp flag set */ 482 #define FLG_OF1_ZDIRECT 0x0000000010 /* -z direct flag set */ 483 #define FLG_OF1_NDIRECT 0x0000000020 /* no-direct bindings specified */ 484 #define FLG_OF1_DEFERRED 0x0000000040 /* deferred dependency recording */ 485 486 #define FLG_OF1_RELDYN 0x0000000100 /* process .dynamic in rel obj */ 487 #define FLG_OF1_NRLXREL 0x0000000200 /* -z norelaxreloc flag set */ 488 #define FLG_OF1_RLXREL 0x0000000400 /* -z relaxreloc flag set */ 489 #define FLG_OF1_IGNORE 0x0000000800 /* ignore unused dependencies */ 490 #define FLG_OF1_NOSGHND 0x0000001000 /* -z nosighandler flag set */ 491 #define FLG_OF1_TEXTOFF 0x0000002000 /* text relocations are ok */ 492 #define FLG_OF1_ABSEXEC 0x0000004000 /* -zabsexec set */ 493 #define FLG_OF1_LAZYLD 0x0000008000 /* lazy loading of objects enabled */ 494 #define FLG_OF1_GRPPRM 0x0000010000 /* dependencies are to have */ 495 /* GROUPPERM enabled */ 496 497 #define FLG_OF1_NOPARTI 0x0000040000 /* -znopartial set */ 498 #define FLG_OF1_BSSOREL 0x0000080000 /* output relocation against bss */ 499 /* section */ 500 #define FLG_OF1_TLSOREL 0x0000100000 /* output relocation against .tlsbss */ 501 /* section */ 502 #define FLG_OF1_MEMORY 0x0000200000 /* produce a memory model */ 503 #define FLG_OF1_NGLBDIR 0x0000400000 /* no DT_1_DIRECT flag allowed */ 504 #define FLG_OF1_ENCDIFF 0x0000800000 /* host running linker has different */ 505 /* byte order than output object */ 506 #define FLG_OF1_VADDR 0x0001000000 /* a segment defines explicit vaddr */ 507 #define FLG_OF1_EXTRACT 0x0002000000 /* archive member has been extracted */ 508 #define FLG_OF1_RESCAN 0x0004000000 /* any archives should be rescanned */ 509 #define FLG_OF1_IGNPRC 0x0008000000 /* ignore processing required */ 510 #define FLG_OF1_NCSTTAB 0x0010000000 /* -znocompstrtab set */ 511 #define FLG_OF1_DONE 0x0020000000 /* link-editor processing complete */ 512 #define FLG_OF1_NONREG 0x0040000000 /* non-regular file specified as */ 513 /* the output file */ 514 #define FLG_OF1_ALNODIR 0x0080000000 /* establish NODIRECT for all */ 515 /* exported interfaces. */ 516 #define FLG_OF1_OVHWCAP1 0x0100000000 /* override CA_SUNW_HW_1 capabilities */ 517 #define FLG_OF1_OVSFCAP1 0x0200000000 /* override CA_SUNW_SF_1 capabilities */ 518 #define FLG_OF1_OVHWCAP2 0x0400000000 /* override CA_SUNW_HW_2 capabilities */ 519 #define FLG_OF1_OVMACHCAP 0x0800000000 /* override CA_SUNW_MACH capability */ 520 #define FLG_OF1_OVPLATCAP 0x1000000000 /* override CA_SUNW_PLAT capability */ 521 #define FLG_OF1_OVIDCAP 0x2000000000 /* override CA_SUNW_ID capability */ 522 523 /* 524 * Guidance flags. The flags with the FLG_OFG_NO_ prefix are used to suppress 525 * messages for a given category, and use the lower 28 bits of the word, 526 * The upper nibble is reserved for other guidance status. 527 */ 528 #define FLG_OFG_ENABLE 0x10000000 /* -z guidance option active */ 529 #define FLG_OFG_ISSUED 0x20000000 /* -z guidance message issued */ 530 531 #define FLG_OFG_NO_ALL 0x0fffffff /* disable all guidance */ 532 #define FLG_OFG_NO_DEFS 0x00000001 /* specify all dependencies */ 533 #define FLG_OFG_NO_DB 0x00000002 /* use direct bindings */ 534 #define FLG_OFG_NO_LAZY 0x00000004 /* be explicit about lazyload */ 535 #define FLG_OFG_NO_MF 0x00000008 /* use v2 mapfile syntax */ 536 #define FLG_OFG_NO_TEXT 0x00000010 /* verify pure text segment */ 537 #define FLG_OFG_NO_UNUSED 0x00000020 /* remove unused dependency */ 538 539 /* 540 * Test to see if a guidance should be given for a given category 541 * or not. _no_flag is one of the FLG_OFG_NO_xxx flags. Returns TRUE 542 * if the guidance should be issued, and FALSE to remain silent. 543 */ 544 #define OFL_GUIDANCE(_ofl, _no_flag) (((_ofl)->ofl_guideflags & \ 545 (FLG_OFG_ENABLE | (_no_flag))) == FLG_OFG_ENABLE) 546 547 /* 548 * Test to see if the output file would allow the presence of 549 * a .dynsym section. 550 */ 551 #define OFL_ALLOW_DYNSYM(_ofl) (((_ofl)->ofl_flags & \ 552 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == FLG_OF_DYNAMIC) 553 554 /* 555 * Test to see if the output file would allow the presence of 556 * a .SUNW_ldynsym section. The requirements are that a .dynsym 557 * is allowed, and -znoldynsym has not been specified. Note that 558 * even if the answer is True (1), we will only generate one if there 559 * are local symbols that require it. 560 */ 561 #define OFL_ALLOW_LDYNSYM(_ofl) (((_ofl)->ofl_flags & \ 562 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ | FLG_OF_NOLDYNSYM)) == FLG_OF_DYNAMIC) 563 564 /* 565 * Test to see if relocation processing should be done. This is normally 566 * true, but can be disabled via the '-z noreloc' option. Note that 567 * relocatable objects are still relocated even if '-z noreloc' is present. 568 */ 569 #define OFL_DO_RELOC(_ofl) (((_ofl)->ofl_flags & FLG_OF_RELOBJ) || \ 570 !((_ofl)->ofl_dtflags_1 & DF_1_NORELOC)) 571 572 /* 573 * Determine whether a static executable is being built. 574 */ 575 #define OFL_IS_STATIC_EXEC(_ofl) (((_ofl)->ofl_flags & \ 576 (FLG_OF_STATIC | FLG_OF_EXEC)) == (FLG_OF_STATIC | FLG_OF_EXEC)) 577 578 /* 579 * Determine whether a static object is being built. This macro is used 580 * to select the appropriate string table, and symbol table that other 581 * sections need to reference. 582 */ 583 #define OFL_IS_STATIC_OBJ(_ofl) ((_ofl)->ofl_flags & \ 584 (FLG_OF_RELOBJ | FLG_OF_STATIC)) 585 586 /* 587 * Macros for counting symbol table entries. These are used to size symbol 588 * tables and associated sections (.syminfo, SUNW_capinfo, .hash, etc.) and 589 * set required sh_info entries (the offset to the first global symbol). 590 */ 591 #define SYMTAB_LOC_CNT(_ofl) /* local .symtab entries */ \ 592 (2 + /* NULL and STT_FILE */ \ 593 (_ofl)->ofl_shdrcnt + /* section symbol */ \ 594 (_ofl)->ofl_caploclcnt + /* local capabilities */ \ 595 (_ofl)->ofl_scopecnt + /* scoped symbols */ \ 596 (_ofl)->ofl_locscnt) /* standard locals */ 597 #define SYMTAB_ALL_CNT(_ofl) /* all .symtab entries */ \ 598 (SYMTAB_LOC_CNT(_ofl) + /* .symtab locals */ \ 599 (_ofl)->ofl_globcnt) /* standard globals */ 600 601 #define DYNSYM_LOC_CNT(_ofl) /* local .dynsym entries */ \ 602 (1 + /* NULL */ \ 603 (_ofl)->ofl_dynshdrcnt + /* section symbols */ \ 604 (_ofl)->ofl_caploclcnt + /* local capabilities */ \ 605 (_ofl)->ofl_lregsymcnt) /* local register symbols */ 606 #define DYNSYM_ALL_CNT(_ofl) /* all .dynsym entries */ \ 607 (DYNSYM_LOC_CNT(_ofl) + /* .dynsym locals */ \ 608 (_ofl)->ofl_globcnt) /* standard globals */ 609 610 /* 611 * Define a move descriptor used within relocation structures. 612 */ 613 typedef struct { 614 Move *mr_move; 615 Sym_desc *mr_sym; 616 } Mv_reloc; 617 618 /* 619 * Relocation (active & output) processing structure - transparent to common 620 * code. There can be millions of these structures in a large link, so it 621 * is important to keep it small. You should only add new items to Rel_desc 622 * if they are critical, apply to most relocations, and cannot be easily 623 * computed from the other information. 624 * 625 * Items that can be derived should be implemented as a function that accepts 626 * a Rel_desc argument, and returns the desired data. ld_reloc_sym_name() is 627 * an example of this. 628 * 629 * Lesser used relocation data is kept in an auxiliary block, Rel_aux, 630 * that is only allocated as necessary. In exchange for adding one pointer 631 * of overhead to Rel_desc (rel_aux), most relocations are reduced in size 632 * by the size of Rel_aux. This strategy relies on the data in Rel_aux 633 * being rarely needed --- otherwise it will backfire badly. 634 * 635 * Note that rel_raddend is primarily only of interest to RELA relocations, 636 * and is set to 0 for REL. However, there is an exception: If FLG_REL_NADDEND 637 * is set, then rel_raddend contains a replacement value for the implicit 638 * addend found in the relocation target. 639 * 640 * Fields should be ordered from largest to smallest, to minimize packing 641 * holes in the struct layout. 642 */ 643 struct rel_desc { 644 Is_desc *rel_isdesc; /* input section reloc is against */ 645 Sym_desc *rel_sym; /* sym relocation is against */ 646 Rel_aux *rel_aux; /* NULL, or auxiliary data */ 647 Xword rel_roffset; /* relocation offset */ 648 Sxword rel_raddend; /* addend from input relocation */ 649 Word rel_flags; /* misc. flags for relocations */ 650 Word rel_rtype; /* relocation type */ 651 }; 652 653 /* 654 * Data that would be kept in Rel_desc if the size of that structure was 655 * not an issue. This auxiliary block is only allocated as needed, 656 * and must only contain rarely needed items. The goal is for the vast 657 * majority of Rel_desc structs to not have an auxiliary block. 658 * 659 * When a Rel_desc does not have an auxiliary block, a default value 660 * is assumed for each auxiliary item: 661 * 662 * - ra_osdesc: 663 * Output section to which relocation applies. The default 664 * value for this is the output section associated with the 665 * input section (rel_isdesc->is_osdesc), or NULL if there 666 * is no associated input section. 667 * 668 * - ra_usym: 669 * If the symbol associated with a relocation is part of a weak/strong 670 * pair, then ra_usym contains the strong symbol and rel_sym the weak. 671 * Otherwise, the default value is the same value as rel_sym. 672 * 673 * - ra_move: 674 * Move table data. The default value is NULL. 675 * 676 * - ra_typedata: 677 * ELF_R_TYPE_DATA(info). This value applies only to a small 678 * subset of 64-bit sparc relocations, and is otherwise 0. The 679 * default value is 0. 680 * 681 * If any value in Rel_aux is non-default, then an auxiliary block is 682 * necessary, and each field contains its actual value. If all the auxiliary 683 * values are default, no Rel_aux is needed, and the RELAUX_GET_xxx() 684 * macros below are able to supply the proper default. 685 * 686 * To set a Rel_aux value, use the ld_reloc_set_aux_XXX() functions. 687 * These functions are written to avoid unnecessary auxiliary allocations, 688 * and know the rules for each item. 689 */ 690 struct rel_aux { 691 Os_desc *ra_osdesc; /* output section reloc is against */ 692 Sym_desc *ra_usym; /* strong sym if this is a weak pair */ 693 Mv_reloc *ra_move; /* move table information */ 694 Word ra_typedata; /* ELF_R_TYPE_DATA(info) */ 695 }; 696 697 /* 698 * Test a given auxiliary value to determine if it has the default value 699 * for that item, as described above. If all the auxiliary items have 700 * their default values, no auxiliary place is necessary to represent them. 701 * If any one of them is non-default, the auxiliary block is needed. 702 */ 703 #define RELAUX_ISDEFAULT_MOVE(_rdesc, _mv) (_mv == NULL) 704 #define RELAUX_ISDEFAULT_USYM(_rdesc, _usym) ((_rdesc)->rel_sym == _usym) 705 #define RELAUX_ISDEFAULT_OSDESC(_rdesc, _osdesc) \ 706 ((((_rdesc)->rel_isdesc == NULL) && (_osdesc == NULL)) || \ 707 ((_rdesc)->rel_isdesc && ((_rdesc)->rel_isdesc->is_osdesc == _osdesc))) 708 #define RELAUX_ISDEFAULT_TYPEDATA(_rdesc, _typedata) (_typedata == 0) 709 710 /* 711 * Retrieve the value of an auxiliary relocation item, preserving the illusion 712 * that every relocation descriptor has an auxiliary block attached. The 713 * real implementation is that an auxiliary block is only present if one or 714 * more auxiliary items have non-default values. These macros return the true 715 * value if an auxiliary block is present, and the default value for the 716 * item otherwise. 717 */ 718 #define RELAUX_GET_MOVE(_rdesc) \ 719 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_move : NULL) 720 #define RELAUX_GET_USYM(_rdesc) \ 721 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_usym : (_rdesc)->rel_sym) 722 #define RELAUX_GET_OSDESC(_rdesc) \ 723 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_osdesc : \ 724 ((_rdesc)->rel_isdesc ? (_rdesc)->rel_isdesc->is_osdesc : NULL)) 725 #define RELAUX_GET_TYPEDATA(_rdesc) \ 726 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_typedata : 0) 727 728 /* 729 * common flags used on the Rel_desc structure (defined in machrel.h). 730 */ 731 #define FLG_REL_GOT 0x00000001 /* relocation against GOT */ 732 #define FLG_REL_PLT 0x00000002 /* relocation against PLT */ 733 #define FLG_REL_BSS 0x00000004 /* relocation against BSS */ 734 #define FLG_REL_LOAD 0x00000008 /* section loadable */ 735 #define FLG_REL_SCNNDX 0x00000010 /* use section index for symbol ndx */ 736 #define FLG_REL_CLVAL 0x00000020 /* clear VALUE for active relocation */ 737 #define FLG_REL_ADVAL 0x00000040 /* add VALUE for output relocation, */ 738 /* only relevant to SPARC and */ 739 /* R_SPARC_RELATIVE */ 740 #define FLG_REL_GOTCL 0x00000080 /* clear the GOT entry. This is */ 741 /* relevant to RELA relocations, */ 742 /* not REL (i386) relocations */ 743 #define FLG_REL_MOVETAB 0x00000100 /* Relocation against .SUNW_move */ 744 /* adjustments required before */ 745 /* actual relocation */ 746 #define FLG_REL_NOINFO 0x00000200 /* Relocation comes from a section */ 747 /* with a null sh_info field */ 748 #define FLG_REL_REG 0x00000400 /* Relocation target is reg sym */ 749 #define FLG_REL_FPTR 0x00000800 /* relocation against func. desc. */ 750 #define FLG_REL_RFPTR1 0x00001000 /* Relative relocation against */ 751 /* 1st part of FD */ 752 #define FLG_REL_RFPTR2 0x00002000 /* Relative relocation against */ 753 /* 2nd part of FD */ 754 #define FLG_REL_DISP 0x00004000 /* *disp* relocation */ 755 #define FLG_REL_STLS 0x00008000 /* IE TLS reference to */ 756 /* static TLS GOT index */ 757 #define FLG_REL_DTLS 0x00010000 /* GD TLS reference relative to */ 758 /* dynamic TLS GOT index */ 759 #define FLG_REL_MTLS 0x00020000 /* LD TLS reference against GOT */ 760 #define FLG_REL_STTLS 0x00040000 /* LE TLS reference directly */ 761 /* to static tls index */ 762 #define FLG_REL_TLSFIX 0x00080000 /* relocation points to TLS instr. */ 763 /* which needs updating */ 764 #define FLG_REL_RELA 0x00100000 /* descriptor captures a Rela */ 765 #define FLG_REL_GOTFIX 0x00200000 /* relocation points to GOTOP instr. */ 766 /* which needs updating */ 767 #define FLG_REL_NADDEND 0x00400000 /* Replace implicit addend in dest */ 768 /* with value in rel_raddend */ 769 /* Relevant to REL (i386) */ 770 /* relocations, not to RELA. */ 771 772 /* 773 * We often need the name of the symbol contained in a relocation descriptor 774 * for diagnostic or error output. This is usually the symbol name, but 775 * we substitute a constructed name in some cases. Hence, the name is 776 * generated on the fly by a private function within libld. This is the 777 * prototype for that function. 778 */ 779 typedef const char *(* rel_desc_sname_func_t)(Rel_desc *); 780 781 /* 782 * Header for a relocation descriptor cache buffer. 783 */ 784 struct rel_cachebuf { 785 Rel_desc *rc_end; 786 Rel_desc *rc_free; 787 Rel_desc rc_arr[1]; 788 }; 789 790 /* 791 * Header for a relocation auxiliary descriptor cache buffer. 792 */ 793 struct rel_aux_cachebuf { 794 Rel_aux *rac_end; 795 Rel_aux *rac_free; 796 Rel_aux rac_arr[1]; 797 }; 798 799 /* 800 * Convenience macro for traversing every relocation descriptor found within 801 * a given relocation cache, transparently handling the cache buffers and 802 * skipping any unallocated descriptors within the buffers. 803 * 804 * entry: 805 * _rel_cache - Relocate descriptor cache (Rel_cache) to traverse 806 * _idx - Aliste index variable for use by the macro 807 * _rcbp - Cache buffer pointer, for use by the macro 808 * _orsp - Rel_desc pointer, which will take on the value of a different 809 * relocation descriptor in the cache in each iteration. 810 * 811 * The caller must not assign new values to _idx, _rcbp, or _orsp within 812 * the scope of REL_CACHE_TRAVERSE. 813 */ 814 #define REL_CACHE_TRAVERSE(_rel_cache, _idx, _rcbp, _orsp) \ 815 for (APLIST_TRAVERSE((_rel_cache)->rc_list, _idx, _rcbp)) \ 816 for (_orsp = _rcbp->rc_arr; _orsp < _rcbp->rc_free; _orsp++) 817 818 /* 819 * Symbol value descriptor. For relocatable objects, each symbols value is 820 * its offset within its associated section. Therefore, to uniquely define 821 * each symbol within a relocatable object, record and sort the sh_offset and 822 * symbol value. This information is used to search for displacement 823 * relocations as part of copy relocation validation. 824 */ 825 typedef struct { 826 Addr ssv_value; 827 Sym_desc *ssv_sdp; 828 } Ssv_desc; 829 830 /* 831 * Input file processing structures. 832 */ 833 struct ifl_desc { /* input file descriptor */ 834 const char *ifl_name; /* full file name */ 835 const char *ifl_soname; /* shared object name */ 836 dev_t ifl_stdev; /* device id and inode number for .so */ 837 ino_t ifl_stino; /* multiple inclusion checks */ 838 Ehdr *ifl_ehdr; /* elf header describing this file */ 839 Elf *ifl_elf; /* elf descriptor for this file */ 840 Sym_desc **ifl_oldndx; /* original symbol table indices */ 841 Sym_desc *ifl_locs; /* symbol desc version of locals */ 842 Ssv_desc *ifl_sortsyms; /* sorted list of symbols by value */ 843 Word ifl_locscnt; /* no. of local symbols to process */ 844 Word ifl_symscnt; /* total no. of symbols to process */ 845 Word ifl_sortcnt; /* no. of sorted symbols to process */ 846 Word ifl_shnum; /* number of sections in file */ 847 Word ifl_shstrndx; /* index to .shstrtab */ 848 Word ifl_vercnt; /* number of versions in file */ 849 Half ifl_neededndx; /* index to NEEDED in .dyn section */ 850 Word ifl_flags; /* explicit/implicit reference */ 851 Is_desc **ifl_isdesc; /* isdesc[scn ndx] = Is_desc ptr */ 852 Sdf_desc *ifl_sdfdesc; /* control definition */ 853 Versym *ifl_versym; /* version symbol table array */ 854 Ver_index *ifl_verndx; /* verndx[ver ndx] = Ver_index */ 855 APlist *ifl_verdesc; /* version descriptor list */ 856 APlist *ifl_relsect; /* relocation section list */ 857 Alist *ifl_groups; /* SHT_GROUP section list */ 858 Cap_desc *ifl_caps; /* capabilities descriptor */ 859 }; 860 861 #define FLG_IF_CMDLINE 0x00000001 /* full filename specified from the */ 862 /* command line (no -l) */ 863 #define FLG_IF_NEEDED 0x00000002 /* shared object should be recorded */ 864 #define FLG_IF_DIRECT 0x00000004 /* establish direct bindings to this */ 865 /* object */ 866 #define FLG_IF_EXTRACT 0x00000008 /* file extracted from an archive */ 867 #define FLG_IF_VERNEED 0x00000010 /* version dependency information is */ 868 /* required */ 869 #define FLG_IF_DEPREQD 0x00000020 /* dependency is required to satisfy */ 870 /* symbol references */ 871 #define FLG_IF_NEEDSTR 0x00000040 /* dependency specified by -Nn */ 872 /* flag */ 873 #define FLG_IF_IGNORE 0x00000080 /* ignore unused dependencies */ 874 #define FLG_IF_NODIRECT 0x00000100 /* object contains symbols that */ 875 /* cannot be directly bound to */ 876 #define FLG_IF_LAZYLD 0x00000200 /* dependency should be lazy loaded */ 877 #define FLG_IF_GRPPRM 0x00000400 /* dependency establishes a group */ 878 #define FLG_IF_DISPPEND 0x00000800 /* displacement relocation done */ 879 /* in the ld time. */ 880 #define FLG_IF_DISPDONE 0x00001000 /* displacement relocation done */ 881 /* at the run time */ 882 #define FLG_IF_MAPFILE 0x00002000 /* file is a mapfile */ 883 #define FLG_IF_HSTRTAB 0x00004000 /* file has a string section */ 884 #define FLG_IF_FILEREF 0x00008000 /* file contains a section which */ 885 /* is included in the output */ 886 /* allocatable image */ 887 #define FLG_IF_GNUVER 0x00010000 /* file used GNU-style versioning */ 888 #define FLG_IF_ORDERED 0x00020000 /* ordered section processing */ 889 /* required */ 890 #define FLG_IF_OTOSCAP 0x00040000 /* convert object capabilities to */ 891 /* symbol capabilities */ 892 #define FLG_IF_DEFERRED 0x00080000 /* dependency is deferred */ 893 #define FLG_IF_RTLDINF 0x00100000 /* dependency has DT_SUNW_RTLTINF set */ 894 #define FLG_IF_GROUPS 0x00200000 /* input file has groups to process */ 895 896 /* 897 * Symbol states that require the generation of a DT_POSFLAG_1 .dynamic entry. 898 */ 899 #define MSK_IF_POSFLAG1 (FLG_IF_LAZYLD | FLG_IF_GRPPRM | FLG_IF_DEFERRED) 900 901 /* 902 * Symbol states that require an associated Syminfo entry. 903 */ 904 #define MSK_IF_SYMINFO (FLG_IF_LAZYLD | FLG_IF_DIRECT | FLG_IF_DEFERRED) 905 906 907 struct is_desc { /* input section descriptor */ 908 const char *is_name; /* original section name */ 909 const char *is_sym_name; /* NULL, or name string to use for */ 910 /* related STT_SECTION symbols */ 911 Shdr *is_shdr; /* the elf section header */ 912 Ifl_desc *is_file; /* infile desc for this section */ 913 Os_desc *is_osdesc; /* new output section for this */ 914 /* input section */ 915 Elf_Data *is_indata; /* input sections raw data */ 916 Is_desc *is_symshndx; /* related SHT_SYM_SHNDX section */ 917 Is_desc *is_comdatkeep; /* If COMDAT section is discarded, */ 918 /* this is section that was kept */ 919 Word is_scnndx; /* original section index in file */ 920 Word is_ordndx; /* index for section. Used to decide */ 921 /* where to insert section when */ 922 /* reordering sections */ 923 Word is_keyident; /* key for SHF_{ORDERED|LINK_ORDER} */ 924 /* processing and ident used for */ 925 /* placing/ordering sections */ 926 Word is_flags; /* Various flags */ 927 }; 928 929 #define FLG_IS_ORDERED 0x0001 /* this is a SHF_ORDERED section */ 930 #define FLG_IS_KEY 0x0002 /* section requires sort keys */ 931 #define FLG_IS_DISCARD 0x0004 /* section is to be discarded */ 932 #define FLG_IS_RELUPD 0x0008 /* symbol defined here may have moved */ 933 #define FLG_IS_SECTREF 0x0010 /* section has been referenced */ 934 #define FLG_IS_GDATADEF 0x0020 /* section contains global data sym */ 935 #define FLG_IS_EXTERNAL 0x0040 /* isp from a user file */ 936 #define FLG_IS_INSTRMRG 0x0080 /* Usable SHF_MERGE|SHF_STRINGS sec */ 937 #define FLG_IS_GNSTRMRG 0x0100 /* Generated mergeable string section */ 938 939 #define FLG_IS_PLACE 0x0400 /* section requires to be placed */ 940 #define FLG_IS_COMDAT 0x0800 /* section is COMDAT */ 941 #define FLG_IS_EHFRAME 0x1000 /* section is .eh_frame */ 942 943 /* 944 * Output sections contain lists of input sections that are assigned to them. 945 * These items fall into 4 categories: 946 * BEFORE - Ordered sections that specify SHN_BEFORE, in input order. 947 * ORDERED - Ordered sections that are sorted using unsorted sections 948 * as the sort key. 949 * DEFAULT - Sections that are placed into the output section 950 * in input order. 951 * AFTER - Ordered sections that specify SHN_AFTER, in input order. 952 */ 953 #define OS_ISD_BEFORE 0 954 #define OS_ISD_ORDERED 1 955 #define OS_ISD_DEFAULT 2 956 #define OS_ISD_AFTER 3 957 #define OS_ISD_NUM 4 958 typedef APlist *os_isdecs_arr[OS_ISD_NUM]; 959 960 /* 961 * Convenience macro for traversing every input section associated 962 * with a given output section. The primary benefit of this macro 963 * is that it preserves a precious level of code indentation in the 964 * code that uses it. 965 */ 966 #define OS_ISDESCS_TRAVERSE(_list_idx, _osp, _idx, _isp) \ 967 for (_list_idx = 0; _list_idx < OS_ISD_NUM; _list_idx++) \ 968 for (APLIST_TRAVERSE(_osp->os_isdescs[_list_idx], _idx, _isp)) 969 970 971 /* 972 * Map file and output file processing structures 973 */ 974 struct os_desc { /* Output section descriptor */ 975 const char *os_name; /* the section name */ 976 Elf_Scn *os_scn; /* the elf section descriptor */ 977 Shdr *os_shdr; /* the elf section header */ 978 Os_desc *os_relosdesc; /* the output relocation section */ 979 APlist *os_relisdescs; /* reloc input section descriptors */ 980 /* for this output section */ 981 os_isdecs_arr os_isdescs; /* lists of input sections in output */ 982 APlist *os_mstrisdescs; /* FLG_IS_INSTRMRG input sections */ 983 Sg_desc *os_sgdesc; /* segment os_desc is placed on */ 984 Elf_Data *os_outdata; /* output sections raw data */ 985 avl_tree_t *os_comdats; /* AVL tree of COMDAT input sections */ 986 /* associated to output section */ 987 Word os_identndx; /* section identifier for input */ 988 /* section processing, followed */ 989 /* by section symbol index */ 990 Word os_ordndx; /* index for section. Used to decide */ 991 /* where to insert section when */ 992 /* reordering sections */ 993 Xword os_szoutrels; /* size of output relocation section */ 994 uint_t os_namehash; /* hash on section name */ 995 uchar_t os_flags; /* various flags */ 996 }; 997 998 #define FLG_OS_KEY 0x01 /* section requires sort keys */ 999 #define FLG_OS_OUTREL 0x02 /* output rel against this section */ 1000 #define FLG_OS_SECTREF 0x04 /* isps are not affected by -zignore */ 1001 #define FLG_OS_EHFRAME 0x08 /* section is .eh_frame */ 1002 1003 /* 1004 * The sg_id field of the segment descriptor is used to establish the default 1005 * order for program headers and segments in the output object. Segments are 1006 * ordered according to the following SGID values that classify them based on 1007 * their attributes. The initial set of built in segments are in this order, 1008 * and new mapfile defined segments are inserted into these groups. Within a 1009 * given SGID group, the position of new segments depends on the syntax 1010 * version of the mapfile that creates them. Version 1 (original sysv) 1011 * mapfiles place the new segment at the head of their group (reverse creation 1012 * order). The newer syntax places them at the end, following the others 1013 * (creation order). 1014 * 1015 * Note that any new segments must always be added after PT_PHDR and 1016 * PT_INTERP (refer Generic ABI, Page 5-4). 1017 */ 1018 #define SGID_PHDR 0 /* PT_PHDR */ 1019 #define SGID_INTERP 1 /* PT_INTERP */ 1020 #define SGID_SUNWCAP 2 /* PT_SUNWCAP */ 1021 #define SGID_TEXT 3 /* PT_LOAD */ 1022 #define SGID_DATA 4 /* PT_LOAD */ 1023 #define SGID_BSS 5 /* PT_LOAD */ 1024 #if defined(_ELF64) 1025 #define SGID_LRODATA 6 /* PT_LOAD (amd64-only) */ 1026 #define SGID_LDATA 7 /* PT_LOAD (amd64-only) */ 1027 #endif 1028 #define SGID_TEXT_EMPTY 8 /* PT_LOAD, reserved (?E in version 1 syntax) */ 1029 #define SGID_NULL_EMPTY 9 /* PT_NULL, reserved (?E in version 1 syntax) */ 1030 #define SGID_DYN 10 /* PT_DYNAMIC */ 1031 #define SGID_DTRACE 11 /* PT_SUNWDTRACE */ 1032 #define SGID_TLS 12 /* PT_TLS */ 1033 #define SGID_UNWIND 13 /* PT_SUNW_UNWIND */ 1034 #define SGID_SUNWSTACK 14 /* PT_SUNWSTACK */ 1035 #define SGID_NOTE 15 /* PT_NOTE */ 1036 #define SGID_NULL 16 /* PT_NULL, mapfile defined empty phdr slots */ 1037 /* for use by post processors */ 1038 #define SGID_EXTRA 17 /* PT_NULL (final catchall) */ 1039 1040 typedef Half sg_flags_t; 1041 struct sg_desc { /* output segment descriptor */ 1042 Word sg_id; /* segment identifier (for sorting) */ 1043 Phdr sg_phdr; /* segment header for output file */ 1044 const char *sg_name; /* segment name for PT_LOAD, PT_NOTE, */ 1045 /* and PT_NULL, otherwise NULL */ 1046 Xword sg_round; /* data rounding required (mapfile) */ 1047 Xword sg_length; /* maximum segment length; if 0 */ 1048 /* segment is not specified */ 1049 APlist *sg_osdescs; /* list of output section descriptors */ 1050 APlist *sg_is_order; /* list of entry criteria */ 1051 /* giving input section order */ 1052 Alist *sg_os_order; /* list specifying output section */ 1053 /* ordering for the segment */ 1054 sg_flags_t sg_flags; 1055 APlist *sg_sizesym; /* size symbols for this segment */ 1056 Xword sg_align; /* LCM of sh_addralign */ 1057 Elf_Scn *sg_fscn; /* the SCN of the first section. */ 1058 avl_node_t sg_avlnode; /* AVL book-keeping */ 1059 }; 1060 1061 #define FLG_SG_P_VADDR 0x0001 /* p_vaddr segment attribute set */ 1062 #define FLG_SG_P_PADDR 0x0002 /* p_paddr segment attribute set */ 1063 #define FLG_SG_LENGTH 0x0004 /* length segment attribute set */ 1064 #define FLG_SG_P_ALIGN 0x0008 /* p_align segment attribute set */ 1065 #define FLG_SG_ROUND 0x0010 /* round segment attribute set */ 1066 #define FLG_SG_P_FLAGS 0x0020 /* p_flags segment attribute set */ 1067 #define FLG_SG_P_TYPE 0x0040 /* p_type segment attribute set */ 1068 #define FLG_SG_IS_ORDER 0x0080 /* input section ordering is required */ 1069 /* for this segment. */ 1070 #define FLG_SG_NOHDR 0x0100 /* don't map ELF or phdrs into */ 1071 /* this segment */ 1072 #define FLG_SG_EMPTY 0x0200 /* an empty segment specification */ 1073 /* no input sections will be */ 1074 /* associated to this section */ 1075 #define FLG_SG_KEY 0x0400 /* segment requires sort keys */ 1076 #define FLG_SG_NODISABLE 0x0800 /* FLG_SG_DISABLED is not allowed on */ 1077 /* this segment */ 1078 #define FLG_SG_DISABLED 0x1000 /* this segment is disabled */ 1079 #define FLG_SG_PHREQ 0x2000 /* this segment requires a program */ 1080 /* header */ 1081 #define FLG_SG_ORDERED 0x4000 /* SEGMENT_ORDER segment */ 1082 1083 struct sec_order { 1084 const char *sco_secname; /* section name to be ordered */ 1085 Half sco_flags; 1086 }; 1087 1088 #define FLG_SGO_USED 0x0001 /* was ordering used? */ 1089 1090 typedef Half ec_flags_t; 1091 struct ent_desc { /* input section entrance criteria */ 1092 const char *ec_name; /* entrace criteria name, or NULL */ 1093 Alist *ec_files; /* files from which to accept */ 1094 /* sections */ 1095 const char *ec_is_name; /* input section name to match */ 1096 /* (NULL if none) */ 1097 Word ec_type; /* section type */ 1098 Word ec_attrmask; /* section attribute mask (AWX) */ 1099 Word ec_attrbits; /* sections attribute bits */ 1100 Sg_desc *ec_segment; /* output segment to enter if matched */ 1101 Word ec_ordndx; /* index to determine where section */ 1102 /* meeting this criteria should */ 1103 /* inserted. Used for reordering */ 1104 /* of sections. */ 1105 ec_flags_t ec_flags; 1106 avl_node_t ec_avlnode; /* AVL book-keeping */ 1107 }; 1108 1109 #define FLG_EC_BUILTIN 0x0001 /* built in descriptor */ 1110 #define FLG_EC_USED 0x0002 /* entrance criteria met? */ 1111 #define FLG_EC_CATCHALL 0x0004 /* Catches any section */ 1112 1113 /* 1114 * Ent_desc_file is the type of element maintained in the ec_files Alist 1115 * of an entrance criteria descriptor. Each item maintains one file 1116 * path, and a set of flags that specify the type of comparison it implies, 1117 * and other information about it. The comparison type is maintained in 1118 * the bottom byte of the flags. 1119 */ 1120 #define TYP_ECF_MASK 0x00ff /* Comparison type mask */ 1121 #define TYP_ECF_PATH 0 /* Compare to file path */ 1122 #define TYP_ECF_BASENAME 1 /* Compare to file basename */ 1123 #define TYP_ECF_OBJNAME 2 /* Compare to regular file basename, */ 1124 /* or to archive member name */ 1125 #define TYP_ECF_NUM 3 1126 1127 #define FLG_ECF_ARMEMBER 0x0100 /* name includes archive member */ 1128 1129 typedef struct { 1130 Word edf_flags; /* Type of comparison */ 1131 const char *edf_name; /* String to compare to */ 1132 size_t edf_name_len; /* strlen(edf_name) */ 1133 } Ent_desc_file; 1134 1135 /* 1136 * One structure is allocated for a move entry, and associated to the symbol 1137 * against which a move is targeted. 1138 */ 1139 typedef struct { 1140 Move *md_move; /* original Move entry */ 1141 Xword md_start; /* start position */ 1142 Xword md_len; /* length of initialization */ 1143 Word md_oidx; /* output Move entry index */ 1144 } Mv_desc; 1145 1146 /* 1147 * Symbol descriptor. 1148 */ 1149 typedef Lword sd_flag_t; 1150 struct sym_desc { 1151 Alist *sd_GOTndxs; /* list of associated GOT entries */ 1152 Sym *sd_sym; /* pointer to symbol table entry */ 1153 Sym *sd_osym; /* copy of the original symbol entry */ 1154 /* used only for local partial */ 1155 Alist *sd_move; /* move information associated with a */ 1156 /* partially initialized symbol */ 1157 const char *sd_name; /* symbols name */ 1158 Ifl_desc *sd_file; /* file where symbol is taken */ 1159 Is_desc *sd_isc; /* input section of symbol definition */ 1160 Sym_aux *sd_aux; /* auxiliary global symbol info. */ 1161 Word sd_symndx; /* index in output symbol table */ 1162 Word sd_shndx; /* sect. index sym is associated w/ */ 1163 sd_flag_t sd_flags; /* state flags */ 1164 Half sd_ref; /* reference definition of symbol */ 1165 }; 1166 1167 /* 1168 * The auxiliary symbol descriptor contains the additional information (beyond 1169 * the symbol descriptor) required to process global symbols. These symbols are 1170 * accessed via an internal symbol hash table where locality of reference is 1171 * important for performance. 1172 */ 1173 struct sym_aux { 1174 APlist *sa_dfiles; /* files where symbol is defined */ 1175 Sym sa_sym; /* copy of symtab entry */ 1176 const char *sa_vfile; /* first unavailable definition */ 1177 const char *sa_rfile; /* file with first symbol referenced */ 1178 Word sa_hash; /* the pure hash value of symbol */ 1179 Word sa_PLTndx; /* index into PLT for symbol */ 1180 Word sa_PLTGOTndx; /* GOT entry indx for PLT indirection */ 1181 Word sa_linkndx; /* index of associated symbol from */ 1182 /* ET_DYN file */ 1183 Half sa_symspec; /* special symbol ids */ 1184 Half sa_overndx; /* output file versioning index */ 1185 Half sa_dverndx; /* dependency versioning index */ 1186 }; 1187 1188 /* 1189 * Nodes used to track symbols in the global AVL symbol dictionary. 1190 */ 1191 struct sym_avlnode { 1192 avl_node_t sav_node; /* AVL node */ 1193 Word sav_hash; /* symbol hash value */ 1194 const char *sav_name; /* symbol name */ 1195 Sym_desc *sav_sdp; /* symbol descriptor */ 1196 }; 1197 1198 /* 1199 * These are the ids for processing of `Special symbols'. They are used 1200 * to set the sym->sd_aux->sa_symspec field. 1201 */ 1202 #define SDAUX_ID_ETEXT 1 /* etext && _etext symbol */ 1203 #define SDAUX_ID_EDATA 2 /* edata && _edata symbol */ 1204 #define SDAUX_ID_END 3 /* end, _end, && _END_ symbol */ 1205 #define SDAUX_ID_DYN 4 /* DYNAMIC && _DYNAMIC symbol */ 1206 #define SDAUX_ID_PLT 5 /* _PROCEDURE_LINKAGE_TABLE_ symbol */ 1207 #define SDAUX_ID_GOT 6 /* _GLOBAL_OFFSET_TABLE_ symbol */ 1208 #define SDAUX_ID_START 7 /* START_ && _START_ symbol */ 1209 1210 /* 1211 * Flags for sym_desc.sd_flags 1212 */ 1213 #define FLG_SY_MVTOCOMM 0x00000001 /* assign symbol to common (.bss) */ 1214 /* this is a result of a */ 1215 /* copy reloc against sym */ 1216 #define FLG_SY_GLOBREF 0x00000002 /* a global reference has been seen */ 1217 #define FLG_SY_WEAKDEF 0x00000004 /* a weak definition has been used */ 1218 #define FLG_SY_CLEAN 0x00000008 /* `Sym' entry points to original */ 1219 /* input file (read-only). */ 1220 #define FLG_SY_UPREQD 0x00000010 /* symbol value update is required, */ 1221 /* either it's used as an entry */ 1222 /* point or for relocation, but */ 1223 /* it must be updated even if */ 1224 /* the -s flag is in effect */ 1225 #define FLG_SY_NOTAVAIL 0x00000020 /* symbol is not available to the */ 1226 /* application either because it */ 1227 /* originates from an implicitly */ 1228 /* referenced shared object, or */ 1229 /* because it is not part of a */ 1230 /* specified version. */ 1231 #define FLG_SY_REDUCED 0x00000040 /* a global is reduced to local */ 1232 #define FLG_SY_VERSPROM 0x00000080 /* version definition has been */ 1233 /* promoted to output file */ 1234 #define FLG_SY_PROT 0x00000100 /* stv_protected visibility seen */ 1235 #define FLG_SY_MAPREF 0x00000200 /* symbol reference generated by user */ 1236 /* from mapfile */ 1237 #define FLG_SY_REFRSD 0x00000400 /* symbols sd_ref has been raised */ 1238 /* due to a copy-relocs */ 1239 /* weak-strong pairing */ 1240 #define FLG_SY_INTPOSE 0x00000800 /* symbol defines an interposer */ 1241 #define FLG_SY_INVALID 0x00001000 /* unwanted/erroneous symbol */ 1242 #define FLG_SY_SMGOT 0x00002000 /* small got index assigned to symbol */ 1243 /* sparc only */ 1244 #define FLG_SY_PARENT 0x00004000 /* symbol to be found in parent */ 1245 /* only used with direct bindings */ 1246 #define FLG_SY_LAZYLD 0x00008000 /* symbol to cause lazyloading of */ 1247 /* parent object */ 1248 #define FLG_SY_ISDISC 0x00010000 /* symbol is a member of a DISCARDED */ 1249 /* section (COMDAT) */ 1250 #define FLG_SY_PAREXPN 0x00020000 /* partially init. symbol to be */ 1251 /* expanded */ 1252 #define FLG_SY_PLTPAD 0x00040000 /* pltpadding has been allocated for */ 1253 /* this symbol */ 1254 #define FLG_SY_REGSYM 0x00080000 /* REGISTER symbol (sparc only) */ 1255 #define FLG_SY_SOFOUND 0x00100000 /* compared against an SO definition */ 1256 #define FLG_SY_EXTERN 0x00200000 /* symbol is external, allows -zdefs */ 1257 /* error suppression */ 1258 #define FLG_SY_MAPUSED 0x00400000 /* mapfile symbol used (occurred */ 1259 /* within a relocatable object) */ 1260 #define FLG_SY_COMMEXP 0x00800000 /* COMMON symbol which has been */ 1261 /* allocated */ 1262 #define FLG_SY_CMDREF 0x01000000 /* symbol was referenced from the */ 1263 /* command line. (ld -u <>, */ 1264 /* ld -zrtldinfo=<>, ...) */ 1265 #define FLG_SY_SPECSEC 0x02000000 /* section index is reserved value */ 1266 /* ABS, COMMON, ... */ 1267 #define FLG_SY_TENTSYM 0x04000000 /* tentative symbol */ 1268 #define FLG_SY_VISIBLE 0x08000000 /* symbols visibility determined */ 1269 #define FLG_SY_STDFLTR 0x10000000 /* symbol is a standard filter */ 1270 #define FLG_SY_AUXFLTR 0x20000000 /* symbol is an auxiliary filter */ 1271 #define FLG_SY_DYNSORT 0x40000000 /* req. in dyn[sym|tls]sort section */ 1272 #define FLG_SY_NODYNSORT 0x80000000 /* excluded from dyn[sym_tls]sort sec */ 1273 1274 #define FLG_SY_DEFAULT 0x0000100000000 /* global symbol, default */ 1275 #define FLG_SY_SINGLE 0x0000200000000 /* global symbol, singleton defined */ 1276 #define FLG_SY_PROTECT 0x0000400000000 /* global symbol, protected defined */ 1277 #define FLG_SY_EXPORT 0x0000800000000 /* global symbol, exported defined */ 1278 1279 #define MSK_SY_GLOBAL \ 1280 (FLG_SY_DEFAULT | FLG_SY_SINGLE | FLG_SY_PROTECT | FLG_SY_EXPORT) 1281 /* this mask indicates that the */ 1282 /* symbol has been explicitly */ 1283 /* defined within a mapfile */ 1284 /* definition, and is a candidate */ 1285 /* for versioning */ 1286 1287 #define FLG_SY_HIDDEN 0x0001000000000 /* global symbol, reduce to local */ 1288 #define FLG_SY_ELIM 0x0002000000000 /* global symbol, eliminate */ 1289 #define FLG_SY_IGNORE 0x0004000000000 /* global symbol, ignored */ 1290 1291 #define MSK_SY_LOCAL (FLG_SY_HIDDEN | FLG_SY_ELIM | FLG_SY_IGNORE) 1292 /* this mask allows all local state */ 1293 /* flags to be removed when the */ 1294 /* symbol is copy relocated */ 1295 1296 #define FLG_SY_EXPDEF 0x0008000000000 /* symbol visibility defined */ 1297 /* explicitly */ 1298 1299 #define MSK_SY_NOAUTO (FLG_SY_SINGLE | FLG_SY_EXPORT | FLG_SY_EXPDEF) 1300 /* this mask indicates that the */ 1301 /* symbol is not a candidate for */ 1302 /* auto-reduction/elimination */ 1303 1304 #define FLG_SY_MAPFILE 0x0010000000000 /* symbol attribute defined in a */ 1305 /* mapfile */ 1306 #define FLG_SY_DIR 0x0020000000000 /* global symbol, direct bindings */ 1307 #define FLG_SY_NDIR 0x0040000000000 /* global symbol, nondirect bindings */ 1308 #define FLG_SY_OVERLAP 0x0080000000000 /* move entry overlap detected */ 1309 #define FLG_SY_CAP 0x0100000000000 /* symbol is associated with */ 1310 /* capabilities */ 1311 #define FLG_SY_DEFERRED 0x0200000000000 /* symbol should not be bound to */ 1312 /* during BIND_NOW relocations */ 1313 1314 /* 1315 * A symbol can only be truly hidden if it is not a capabilities symbol. 1316 */ 1317 #define SYM_IS_HIDDEN(_sdp) \ 1318 (((_sdp)->sd_flags & (FLG_SY_HIDDEN | FLG_SY_CAP)) == FLG_SY_HIDDEN) 1319 1320 /* 1321 * Create a mask for (sym.st_other & visibility) since the gABI does not yet 1322 * define a ELF*_ST_OTHER macro. 1323 */ 1324 #define MSK_SYM_VISIBILITY 0x7 1325 1326 /* 1327 * Structure to manage the shared object definition lists. There are two lists 1328 * that use this structure: 1329 * 1330 * - ofl_soneed; maintain the list of implicitly required dependencies 1331 * (ie. shared objects needed by other shared objects). These definitions 1332 * may include RPATH's required to locate the dependencies, and any 1333 * version requirements. 1334 * 1335 * - ofl_socntl; maintains the shared object control definitions. These are 1336 * provided by the user (via a mapfile) and are used to indicate any 1337 * version control requirements. 1338 */ 1339 struct sdf_desc { 1340 const char *sdf_name; /* the shared objects file name */ 1341 char *sdf_rpath; /* library search path DT_RPATH */ 1342 const char *sdf_rfile; /* referencing file for diagnostics */ 1343 Ifl_desc *sdf_file; /* the final input file descriptor */ 1344 Alist *sdf_vers; /* list of versions that are required */ 1345 /* from this object */ 1346 Alist *sdf_verneed; /* list of VERNEEDS to create for */ 1347 /* object via mapfile ADDVERS */ 1348 Word sdf_flags; 1349 }; 1350 1351 #define FLG_SDF_SELECT 0x01 /* version control selection required */ 1352 #define FLG_SDF_VERIFY 0x02 /* version definition verification */ 1353 /* required */ 1354 #define FLG_SDF_ADDVER 0x04 /* add VERNEED references */ 1355 1356 /* 1357 * Structure to manage shared object version usage requirements. 1358 */ 1359 struct sdv_desc { 1360 const char *sdv_name; /* version name */ 1361 const char *sdv_ref; /* versions reference */ 1362 Word sdv_flags; /* flags */ 1363 }; 1364 1365 #define FLG_SDV_MATCHED 0x01 /* VERDEF found and matched */ 1366 1367 /* 1368 * Structures to manage versioning information. Two versioning structures are 1369 * defined: 1370 * 1371 * - a version descriptor maintains a linked list of versions and their 1372 * associated dependencies. This is used to build the version definitions 1373 * for an image being created (see map_symbol), and to determine the 1374 * version dependency graph for any input files that are versioned. 1375 * 1376 * - a version index array contains each version of an input file that is 1377 * being processed. It informs us which versions are available for 1378 * binding, and is used to generate any version dependency information. 1379 */ 1380 struct ver_desc { 1381 const char *vd_name; /* version name */ 1382 Ifl_desc *vd_file; /* file that defined version */ 1383 Word vd_hash; /* hash value of name */ 1384 Half vd_ndx; /* coordinates with symbol index */ 1385 Half vd_flags; /* version information */ 1386 APlist *vd_deps; /* version dependencies */ 1387 Ver_desc *vd_ref; /* dependency's first reference */ 1388 }; 1389 1390 struct ver_index { 1391 const char *vi_name; /* dependency version name */ 1392 Half vi_flags; /* communicates availability */ 1393 Half vi_overndx; /* index assigned to this version in */ 1394 /* output object Verneed section */ 1395 Ver_desc *vi_desc; /* cross reference to descriptor */ 1396 }; 1397 1398 /* 1399 * Define any internal version descriptor flags ([vd|vi]_flags). Note that the 1400 * first byte is reserved for user visible flags (refer VER_FLG's in link.h). 1401 */ 1402 #define MSK_VER_USER 0x0f /* mask for user visible flags */ 1403 1404 #define FLG_VER_AVAIL 0x10 /* version is available for binding */ 1405 #define FLG_VER_REFER 0x20 /* version has been referenced */ 1406 #define FLG_VER_CYCLIC 0x40 /* a member of cyclic dependency */ 1407 1408 /* 1409 * isalist(1) descriptor - used to break an isalist string into its component 1410 * options. 1411 */ 1412 struct isa_opt { 1413 char *isa_name; /* individual isa option name */ 1414 size_t isa_namesz; /* and associated size */ 1415 }; 1416 1417 struct isa_desc { 1418 char *isa_list; /* sysinfo(SI_ISALIST) list */ 1419 size_t isa_listsz; /* and associated size */ 1420 Isa_opt *isa_opt; /* table of individual isa options */ 1421 size_t isa_optno; /* and associated number */ 1422 }; 1423 1424 /* 1425 * uname(2) descriptor - used to break a utsname structure into its component 1426 * options (at least those that we're interested in). 1427 */ 1428 struct uts_desc { 1429 char *uts_osname; /* operating system name */ 1430 size_t uts_osnamesz; /* and associated size */ 1431 char *uts_osrel; /* operating system release */ 1432 size_t uts_osrelsz; /* and associated size */ 1433 }; 1434 1435 /* 1436 * SHT_GROUP descriptor - used to track group sections at the global 1437 * level to resolve conflicts and determine which to keep. 1438 */ 1439 struct group_desc { 1440 Is_desc *gd_isc; /* input section descriptor */ 1441 Is_desc *gd_oisc; /* overriding input section */ 1442 /* descriptor when discarded */ 1443 const char *gd_name; /* group name (signature symbol) */ 1444 Word *gd_data; /* data for group section */ 1445 size_t gd_cnt; /* number of entries in group data */ 1446 }; 1447 1448 /* 1449 * Indexes into the ld_support_funcs[] table. 1450 */ 1451 typedef enum { 1452 LDS_VERSION = 0, /* Must be first and have value 0 */ 1453 LDS_INPUT_DONE, 1454 LDS_START, 1455 LDS_ATEXIT, 1456 LDS_OPEN, 1457 LDS_FILE, 1458 LDS_INSEC, 1459 LDS_SEC, 1460 LDS_NUM 1461 } Support_ndx; 1462 1463 /* 1464 * Structure to manage archive member caching. Each archive has an archive 1465 * descriptor (Ar_desc) associated with it. This contains pointers to the 1466 * archive symbol table (obtained by elf_getarsyms(3e)) and an auxiliary 1467 * structure (Ar_uax[]) that parallels this symbol table. The member element 1468 * of this auxiliary table indicates whether the archive member associated with 1469 * the symbol offset has already been extracted (AREXTRACTED) or partially 1470 * processed (refer process_member()). 1471 */ 1472 typedef struct ar_mem { 1473 Elf *am_elf; /* elf descriptor for this member */ 1474 const char *am_name; /* members name */ 1475 const char *am_path; /* path (ie. lib(foo.o)) */ 1476 Sym *am_syms; /* start of global symbols */ 1477 char *am_strs; /* associated string table start */ 1478 Xword am_symn; /* no. of global symbols */ 1479 } Ar_mem; 1480 1481 typedef struct ar_aux { 1482 Sym_desc *au_syms; /* internal symbol descriptor */ 1483 Ar_mem *au_mem; /* associated member */ 1484 } Ar_aux; 1485 1486 #define FLG_ARMEM_PROC (Ar_mem *)-1 1487 1488 typedef struct ar_desc { 1489 const char *ad_name; /* archive file name */ 1490 Elf *ad_elf; /* elf descriptor for the archive */ 1491 Elf_Arsym *ad_start; /* archive symbol table start */ 1492 Ar_aux *ad_aux; /* auxiliary symbol information */ 1493 dev_t ad_stdev; /* device id and inode number for */ 1494 ino_t ad_stino; /* multiple inclusion checks */ 1495 ofl_flag_t ad_flags; /* archive specific cmd line flags */ 1496 } Ar_desc; 1497 1498 /* 1499 * Define any archive descriptor flags. NOTE, make sure they do not clash with 1500 * any output file descriptor archive extraction flags, as these are saved in 1501 * the same entry (see MSK_OF1_ARCHIVE). 1502 */ 1503 #define FLG_ARD_EXTRACT 0x00010000 /* archive member has been extracted */ 1504 1505 /* Mapfile versions supported by libld */ 1506 #define MFV_NONE 0 /* Not a valid version */ 1507 #define MFV_SYSV 1 /* Original System V syntax */ 1508 #define MFV_SOLARIS 2 /* Solaris mapfile syntax */ 1509 #define MFV_NUM 3 /* # of mapfile versions */ 1510 1511 1512 /* 1513 * Function Declarations. 1514 */ 1515 #if defined(_ELF64) 1516 1517 #define ld_create_outfile ld64_create_outfile 1518 #define ld_ent_setup ld64_ent_setup 1519 #define ld_init_strings ld64_init_strings 1520 #define ld_init_target ld64_init_target 1521 #define ld_make_sections ld64_make_sections 1522 #define ld_main ld64_main 1523 #define ld_ofl_cleanup ld64_ofl_cleanup 1524 #define ld_process_mem ld64_process_mem 1525 #define ld_reloc_init ld64_reloc_init 1526 #define ld_reloc_process ld64_reloc_process 1527 #define ld_sym_validate ld64_sym_validate 1528 #define ld_update_outfile ld64_update_outfile 1529 1530 #else 1531 1532 #define ld_create_outfile ld32_create_outfile 1533 #define ld_ent_setup ld32_ent_setup 1534 #define ld_init_strings ld32_init_strings 1535 #define ld_init_target ld32_init_target 1536 #define ld_make_sections ld32_make_sections 1537 #define ld_main ld32_main 1538 #define ld_ofl_cleanup ld32_ofl_cleanup 1539 #define ld_process_mem ld32_process_mem 1540 #define ld_reloc_init ld32_reloc_init 1541 #define ld_reloc_process ld32_reloc_process 1542 #define ld_sym_validate ld32_sym_validate 1543 #define ld_update_outfile ld32_update_outfile 1544 1545 #endif 1546 1547 extern int ld_getopt(Lm_list *, int, int, char **); 1548 1549 extern int ld32_main(int, char **, Half); 1550 extern int ld64_main(int, char **, Half); 1551 1552 extern uintptr_t ld_create_outfile(Ofl_desc *); 1553 extern uintptr_t ld_ent_setup(Ofl_desc *, Xword); 1554 extern uintptr_t ld_init_strings(Ofl_desc *); 1555 extern int ld_init_target(Lm_list *, Half mach); 1556 extern uintptr_t ld_make_sections(Ofl_desc *); 1557 extern void ld_ofl_cleanup(Ofl_desc *); 1558 extern Ifl_desc *ld_process_mem(const char *, const char *, char *, 1559 size_t, Ofl_desc *, Rej_desc *); 1560 extern uintptr_t ld_reloc_init(Ofl_desc *); 1561 extern uintptr_t ld_reloc_process(Ofl_desc *); 1562 extern uintptr_t ld_sym_validate(Ofl_desc *); 1563 extern uintptr_t ld_update_outfile(Ofl_desc *); 1564 1565 #ifdef __cplusplus 1566 } 1567 #endif 1568 1569 #endif /* _LIBLD_H */ 1570