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 int ofl_aslr; /* -z aslr, -1 disable, 1 enable */ 410 }; 411 412 #define FLG_OF_DYNAMIC 0x00000001 /* generate dynamic output module */ 413 #define FLG_OF_STATIC 0x00000002 /* generate static output module */ 414 #define FLG_OF_EXEC 0x00000004 /* generate an executable */ 415 #define FLG_OF_RELOBJ 0x00000008 /* generate a relocatable object */ 416 #define FLG_OF_SHAROBJ 0x00000010 /* generate a shared object */ 417 #define FLG_OF_BFLAG 0x00000020 /* do no special plt building: -b */ 418 #define FLG_OF_IGNENV 0x00000040 /* ignore LD_LIBRARY_PATH: -i */ 419 #define FLG_OF_STRIP 0x00000080 /* strip output: -s */ 420 #define FLG_OF_NOWARN 0x00000100 /* disable symbol warnings: -t */ 421 #define FLG_OF_NOUNDEF 0x00000200 /* allow no undefined symbols: -zdefs */ 422 #define FLG_OF_PURETXT 0x00000400 /* allow no text relocations: -ztext */ 423 #define FLG_OF_GENMAP 0x00000800 /* generate a memory map: -m */ 424 #define FLG_OF_DYNLIBS 0x00001000 /* dynamic input allowed: -Bdynamic */ 425 #define FLG_OF_SYMBOLIC 0x00002000 /* bind global symbols: -Bsymbolic */ 426 #define FLG_OF_ADDVERS 0x00004000 /* add version stamp: -Qy */ 427 #define FLG_OF_NOLDYNSYM 0x00008000 /* -znoldynsym set */ 428 #define FLG_OF_IS_ORDER 0x00010000 /* input section ordering within a */ 429 /* segment is required */ 430 #define FLG_OF_EC_FILES 0x00020000 /* Ent_desc exist w/non-NULL ec_files */ 431 #define FLG_OF_TEXTREL 0x00040000 /* text relocations have been found */ 432 #define FLG_OF_MULDEFS 0x00080000 /* multiple symbols are allowed */ 433 #define FLG_OF_TLSPHDR 0x00100000 /* a TLS program header is required */ 434 #define FLG_OF_BLDGOT 0x00200000 /* build GOT table */ 435 #define FLG_OF_VERDEF 0x00400000 /* record version definitions */ 436 #define FLG_OF_VERNEED 0x00800000 /* record version dependencies */ 437 #define FLG_OF_NOVERSEC 0x01000000 /* don't record version sections */ 438 #define FLG_OF_KEY 0x02000000 /* file requires sort keys */ 439 #define FLG_OF_PROCRED 0x04000000 /* process any symbol reductions by */ 440 /* effecting the symbol table */ 441 /* output and relocations */ 442 #define FLG_OF_SYMINFO 0x08000000 /* create a syminfo section */ 443 #define FLG_OF_AUX 0x10000000 /* ofl_filter is an auxiliary filter */ 444 #define FLG_OF_FATAL 0x20000000 /* fatal error during input */ 445 #define FLG_OF_WARN 0x40000000 /* warning during input processing. */ 446 #define FLG_OF_VERBOSE 0x80000000 /* -z verbose flag set */ 447 448 #define FLG_OF_MAPSYMB 0x000100000000 /* symbolic scope definition seen */ 449 #define FLG_OF_MAPGLOB 0x000200000000 /* global scope definition seen */ 450 #define FLG_OF_COMREL 0x000400000000 /* -z combreloc set, which enables */ 451 /* DT_RELACNT tracking, */ 452 #define FLG_OF_NOCOMREL 0x000800000000 /* -z nocombreloc set */ 453 #define FLG_OF_AUTOLCL 0x001000000000 /* automatically reduce unspecified */ 454 /* global symbols to locals */ 455 #define FLG_OF_AUTOELM 0x002000000000 /* automatically eliminate */ 456 /* unspecified global symbols */ 457 #define FLG_OF_REDLSYM 0x004000000000 /* reduce local symbols */ 458 #define FLG_OF_OS_ORDER 0x008000000000 /* output section ordering required */ 459 #define FLG_OF_OSABI 0x010000000000 /* tag object as ELFOSABI_SOLARIS */ 460 #define FLG_OF_ADJOSCNT 0x020000000000 /* adjust ofl_shdrcnt to accommodate */ 461 /* discarded sections */ 462 #define FLG_OF_OTOSCAP 0x040000000000 /* convert object capabilities to */ 463 /* symbol capabilities */ 464 #define FLG_OF_PTCAP 0x080000000000 /* PT_SUNWCAP required */ 465 #define FLG_OF_CAPSTRS 0x100000000000 /* capability strings are required */ 466 #define FLG_OF_EHFRAME 0x200000000000 /* output contains .eh_frame section */ 467 #define FLG_OF_FATWARN 0x400000000000 /* make warnings fatal */ 468 #define FLG_OF_ADEFLIB 0x800000000000 /* no libraries in default path */ 469 470 /* 471 * In the flags1 arena, establish any options that are applicable to archive 472 * extraction first, and associate a mask. These values are recorded with any 473 * archive descriptor so that they may be reset should the archive require a 474 * rescan to try and resolve undefined symbols. 475 */ 476 #define FLG_OF1_ALLEXRT 0x0000000001 /* extract all members from an */ 477 /* archive file */ 478 #define FLG_OF1_WEAKEXT 0x0000000002 /* allow archive extraction to */ 479 /* resolve weak references */ 480 #define MSK_OF1_ARCHIVE 0x0000000003 /* archive flags mask */ 481 482 #define FLG_OF1_NOINTRP 0x0000000008 /* -z nointerp flag set */ 483 #define FLG_OF1_ZDIRECT 0x0000000010 /* -z direct flag set */ 484 #define FLG_OF1_NDIRECT 0x0000000020 /* no-direct bindings specified */ 485 #define FLG_OF1_DEFERRED 0x0000000040 /* deferred dependency recording */ 486 487 #define FLG_OF1_RELDYN 0x0000000100 /* process .dynamic in rel obj */ 488 #define FLG_OF1_NRLXREL 0x0000000200 /* -z norelaxreloc flag set */ 489 #define FLG_OF1_RLXREL 0x0000000400 /* -z relaxreloc flag set */ 490 #define FLG_OF1_IGNORE 0x0000000800 /* ignore unused dependencies */ 491 #define FLG_OF1_NOSGHND 0x0000001000 /* -z nosighandler flag set */ 492 #define FLG_OF1_TEXTOFF 0x0000002000 /* text relocations are ok */ 493 #define FLG_OF1_ABSEXEC 0x0000004000 /* -zabsexec set */ 494 #define FLG_OF1_LAZYLD 0x0000008000 /* lazy loading of objects enabled */ 495 #define FLG_OF1_GRPPRM 0x0000010000 /* dependencies are to have */ 496 /* GROUPPERM enabled */ 497 498 #define FLG_OF1_NOPARTI 0x0000040000 /* -znopartial set */ 499 #define FLG_OF1_BSSOREL 0x0000080000 /* output relocation against bss */ 500 /* section */ 501 #define FLG_OF1_TLSOREL 0x0000100000 /* output relocation against .tlsbss */ 502 /* section */ 503 #define FLG_OF1_MEMORY 0x0000200000 /* produce a memory model */ 504 #define FLG_OF1_NGLBDIR 0x0000400000 /* no DT_1_DIRECT flag allowed */ 505 #define FLG_OF1_ENCDIFF 0x0000800000 /* host running linker has different */ 506 /* byte order than output object */ 507 #define FLG_OF1_VADDR 0x0001000000 /* a segment defines explicit vaddr */ 508 #define FLG_OF1_EXTRACT 0x0002000000 /* archive member has been extracted */ 509 #define FLG_OF1_RESCAN 0x0004000000 /* any archives should be rescanned */ 510 #define FLG_OF1_IGNPRC 0x0008000000 /* ignore processing required */ 511 #define FLG_OF1_NCSTTAB 0x0010000000 /* -znocompstrtab set */ 512 #define FLG_OF1_DONE 0x0020000000 /* link-editor processing complete */ 513 #define FLG_OF1_NONREG 0x0040000000 /* non-regular file specified as */ 514 /* the output file */ 515 #define FLG_OF1_ALNODIR 0x0080000000 /* establish NODIRECT for all */ 516 /* exported interfaces. */ 517 #define FLG_OF1_OVHWCAP1 0x0100000000 /* override CA_SUNW_HW_1 capabilities */ 518 #define FLG_OF1_OVSFCAP1 0x0200000000 /* override CA_SUNW_SF_1 capabilities */ 519 #define FLG_OF1_OVHWCAP2 0x0400000000 /* override CA_SUNW_HW_2 capabilities */ 520 #define FLG_OF1_OVMACHCAP 0x0800000000 /* override CA_SUNW_MACH capability */ 521 #define FLG_OF1_OVPLATCAP 0x1000000000 /* override CA_SUNW_PLAT capability */ 522 #define FLG_OF1_OVIDCAP 0x2000000000 /* override CA_SUNW_ID capability */ 523 524 /* 525 * Guidance flags. The flags with the FLG_OFG_NO_ prefix are used to suppress 526 * messages for a given category, and use the lower 28 bits of the word, 527 * The upper nibble is reserved for other guidance status. 528 */ 529 #define FLG_OFG_ENABLE 0x10000000 /* -z guidance option active */ 530 #define FLG_OFG_ISSUED 0x20000000 /* -z guidance message issued */ 531 532 #define FLG_OFG_NO_ALL 0x0fffffff /* disable all guidance */ 533 #define FLG_OFG_NO_DEFS 0x00000001 /* specify all dependencies */ 534 #define FLG_OFG_NO_DB 0x00000002 /* use direct bindings */ 535 #define FLG_OFG_NO_LAZY 0x00000004 /* be explicit about lazyload */ 536 #define FLG_OFG_NO_MF 0x00000008 /* use v2 mapfile syntax */ 537 #define FLG_OFG_NO_TEXT 0x00000010 /* verify pure text segment */ 538 #define FLG_OFG_NO_UNUSED 0x00000020 /* remove unused dependency */ 539 540 /* 541 * Test to see if a guidance should be given for a given category 542 * or not. _no_flag is one of the FLG_OFG_NO_xxx flags. Returns TRUE 543 * if the guidance should be issued, and FALSE to remain silent. 544 */ 545 #define OFL_GUIDANCE(_ofl, _no_flag) (((_ofl)->ofl_guideflags & \ 546 (FLG_OFG_ENABLE | (_no_flag))) == FLG_OFG_ENABLE) 547 548 /* 549 * Test to see if the output file would allow the presence of 550 * a .dynsym section. 551 */ 552 #define OFL_ALLOW_DYNSYM(_ofl) (((_ofl)->ofl_flags & \ 553 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == FLG_OF_DYNAMIC) 554 555 /* 556 * Test to see if the output file would allow the presence of 557 * a .SUNW_ldynsym section. The requirements are that a .dynsym 558 * is allowed, and -znoldynsym has not been specified. Note that 559 * even if the answer is True (1), we will only generate one if there 560 * are local symbols that require it. 561 */ 562 #define OFL_ALLOW_LDYNSYM(_ofl) (((_ofl)->ofl_flags & \ 563 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ | FLG_OF_NOLDYNSYM)) == FLG_OF_DYNAMIC) 564 565 /* 566 * Test to see if relocation processing should be done. This is normally 567 * true, but can be disabled via the '-z noreloc' option. Note that 568 * relocatable objects are still relocated even if '-z noreloc' is present. 569 */ 570 #define OFL_DO_RELOC(_ofl) (((_ofl)->ofl_flags & FLG_OF_RELOBJ) || \ 571 !((_ofl)->ofl_dtflags_1 & DF_1_NORELOC)) 572 573 /* 574 * Determine whether a static executable is being built. 575 */ 576 #define OFL_IS_STATIC_EXEC(_ofl) (((_ofl)->ofl_flags & \ 577 (FLG_OF_STATIC | FLG_OF_EXEC)) == (FLG_OF_STATIC | FLG_OF_EXEC)) 578 579 /* 580 * Determine whether a static object is being built. This macro is used 581 * to select the appropriate string table, and symbol table that other 582 * sections need to reference. 583 */ 584 #define OFL_IS_STATIC_OBJ(_ofl) ((_ofl)->ofl_flags & \ 585 (FLG_OF_RELOBJ | FLG_OF_STATIC)) 586 587 /* 588 * Macros for counting symbol table entries. These are used to size symbol 589 * tables and associated sections (.syminfo, SUNW_capinfo, .hash, etc.) and 590 * set required sh_info entries (the offset to the first global symbol). 591 */ 592 #define SYMTAB_LOC_CNT(_ofl) /* local .symtab entries */ \ 593 (2 + /* NULL and STT_FILE */ \ 594 (_ofl)->ofl_shdrcnt + /* section symbol */ \ 595 (_ofl)->ofl_caploclcnt + /* local capabilities */ \ 596 (_ofl)->ofl_scopecnt + /* scoped symbols */ \ 597 (_ofl)->ofl_locscnt) /* standard locals */ 598 #define SYMTAB_ALL_CNT(_ofl) /* all .symtab entries */ \ 599 (SYMTAB_LOC_CNT(_ofl) + /* .symtab locals */ \ 600 (_ofl)->ofl_globcnt) /* standard globals */ 601 602 #define DYNSYM_LOC_CNT(_ofl) /* local .dynsym entries */ \ 603 (1 + /* NULL */ \ 604 (_ofl)->ofl_dynshdrcnt + /* section symbols */ \ 605 (_ofl)->ofl_caploclcnt + /* local capabilities */ \ 606 (_ofl)->ofl_lregsymcnt) /* local register symbols */ 607 #define DYNSYM_ALL_CNT(_ofl) /* all .dynsym entries */ \ 608 (DYNSYM_LOC_CNT(_ofl) + /* .dynsym locals */ \ 609 (_ofl)->ofl_globcnt) /* standard globals */ 610 611 /* 612 * Define a move descriptor used within relocation structures. 613 */ 614 typedef struct { 615 Move *mr_move; 616 Sym_desc *mr_sym; 617 } Mv_reloc; 618 619 /* 620 * Relocation (active & output) processing structure - transparent to common 621 * code. There can be millions of these structures in a large link, so it 622 * is important to keep it small. You should only add new items to Rel_desc 623 * if they are critical, apply to most relocations, and cannot be easily 624 * computed from the other information. 625 * 626 * Items that can be derived should be implemented as a function that accepts 627 * a Rel_desc argument, and returns the desired data. ld_reloc_sym_name() is 628 * an example of this. 629 * 630 * Lesser used relocation data is kept in an auxiliary block, Rel_aux, 631 * that is only allocated as necessary. In exchange for adding one pointer 632 * of overhead to Rel_desc (rel_aux), most relocations are reduced in size 633 * by the size of Rel_aux. This strategy relies on the data in Rel_aux 634 * being rarely needed --- otherwise it will backfire badly. 635 * 636 * Note that rel_raddend is primarily only of interest to RELA relocations, 637 * and is set to 0 for REL. However, there is an exception: If FLG_REL_NADDEND 638 * is set, then rel_raddend contains a replacement value for the implicit 639 * addend found in the relocation target. 640 * 641 * Fields should be ordered from largest to smallest, to minimize packing 642 * holes in the struct layout. 643 */ 644 struct rel_desc { 645 Is_desc *rel_isdesc; /* input section reloc is against */ 646 Sym_desc *rel_sym; /* sym relocation is against */ 647 Rel_aux *rel_aux; /* NULL, or auxiliary data */ 648 Xword rel_roffset; /* relocation offset */ 649 Sxword rel_raddend; /* addend from input relocation */ 650 Word rel_flags; /* misc. flags for relocations */ 651 Word rel_rtype; /* relocation type */ 652 }; 653 654 /* 655 * Data that would be kept in Rel_desc if the size of that structure was 656 * not an issue. This auxiliary block is only allocated as needed, 657 * and must only contain rarely needed items. The goal is for the vast 658 * majority of Rel_desc structs to not have an auxiliary block. 659 * 660 * When a Rel_desc does not have an auxiliary block, a default value 661 * is assumed for each auxiliary item: 662 * 663 * - ra_osdesc: 664 * Output section to which relocation applies. The default 665 * value for this is the output section associated with the 666 * input section (rel_isdesc->is_osdesc), or NULL if there 667 * is no associated input section. 668 * 669 * - ra_usym: 670 * If the symbol associated with a relocation is part of a weak/strong 671 * pair, then ra_usym contains the strong symbol and rel_sym the weak. 672 * Otherwise, the default value is the same value as rel_sym. 673 * 674 * - ra_move: 675 * Move table data. The default value is NULL. 676 * 677 * - ra_typedata: 678 * ELF_R_TYPE_DATA(info). This value applies only to a small 679 * subset of 64-bit sparc relocations, and is otherwise 0. The 680 * default value is 0. 681 * 682 * If any value in Rel_aux is non-default, then an auxiliary block is 683 * necessary, and each field contains its actual value. If all the auxiliary 684 * values are default, no Rel_aux is needed, and the RELAUX_GET_xxx() 685 * macros below are able to supply the proper default. 686 * 687 * To set a Rel_aux value, use the ld_reloc_set_aux_XXX() functions. 688 * These functions are written to avoid unnecessary auxiliary allocations, 689 * and know the rules for each item. 690 */ 691 struct rel_aux { 692 Os_desc *ra_osdesc; /* output section reloc is against */ 693 Sym_desc *ra_usym; /* strong sym if this is a weak pair */ 694 Mv_reloc *ra_move; /* move table information */ 695 Word ra_typedata; /* ELF_R_TYPE_DATA(info) */ 696 }; 697 698 /* 699 * Test a given auxiliary value to determine if it has the default value 700 * for that item, as described above. If all the auxiliary items have 701 * their default values, no auxiliary place is necessary to represent them. 702 * If any one of them is non-default, the auxiliary block is needed. 703 */ 704 #define RELAUX_ISDEFAULT_MOVE(_rdesc, _mv) (_mv == NULL) 705 #define RELAUX_ISDEFAULT_USYM(_rdesc, _usym) ((_rdesc)->rel_sym == _usym) 706 #define RELAUX_ISDEFAULT_OSDESC(_rdesc, _osdesc) \ 707 ((((_rdesc)->rel_isdesc == NULL) && (_osdesc == NULL)) || \ 708 ((_rdesc)->rel_isdesc && ((_rdesc)->rel_isdesc->is_osdesc == _osdesc))) 709 #define RELAUX_ISDEFAULT_TYPEDATA(_rdesc, _typedata) (_typedata == 0) 710 711 /* 712 * Retrieve the value of an auxiliary relocation item, preserving the illusion 713 * that every relocation descriptor has an auxiliary block attached. The 714 * real implementation is that an auxiliary block is only present if one or 715 * more auxiliary items have non-default values. These macros return the true 716 * value if an auxiliary block is present, and the default value for the 717 * item otherwise. 718 */ 719 #define RELAUX_GET_MOVE(_rdesc) \ 720 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_move : NULL) 721 #define RELAUX_GET_USYM(_rdesc) \ 722 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_usym : (_rdesc)->rel_sym) 723 #define RELAUX_GET_OSDESC(_rdesc) \ 724 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_osdesc : \ 725 ((_rdesc)->rel_isdesc ? (_rdesc)->rel_isdesc->is_osdesc : NULL)) 726 #define RELAUX_GET_TYPEDATA(_rdesc) \ 727 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_typedata : 0) 728 729 /* 730 * common flags used on the Rel_desc structure (defined in machrel.h). 731 */ 732 #define FLG_REL_GOT 0x00000001 /* relocation against GOT */ 733 #define FLG_REL_PLT 0x00000002 /* relocation against PLT */ 734 #define FLG_REL_BSS 0x00000004 /* relocation against BSS */ 735 #define FLG_REL_LOAD 0x00000008 /* section loadable */ 736 #define FLG_REL_SCNNDX 0x00000010 /* use section index for symbol ndx */ 737 #define FLG_REL_CLVAL 0x00000020 /* clear VALUE for active relocation */ 738 #define FLG_REL_ADVAL 0x00000040 /* add VALUE for output relocation, */ 739 /* only relevant to SPARC and */ 740 /* R_SPARC_RELATIVE */ 741 #define FLG_REL_GOTCL 0x00000080 /* clear the GOT entry. This is */ 742 /* relevant to RELA relocations, */ 743 /* not REL (i386) relocations */ 744 #define FLG_REL_MOVETAB 0x00000100 /* Relocation against .SUNW_move */ 745 /* adjustments required before */ 746 /* actual relocation */ 747 #define FLG_REL_NOINFO 0x00000200 /* Relocation comes from a section */ 748 /* with a null sh_info field */ 749 #define FLG_REL_REG 0x00000400 /* Relocation target is reg sym */ 750 #define FLG_REL_FPTR 0x00000800 /* relocation against func. desc. */ 751 #define FLG_REL_RFPTR1 0x00001000 /* Relative relocation against */ 752 /* 1st part of FD */ 753 #define FLG_REL_RFPTR2 0x00002000 /* Relative relocation against */ 754 /* 2nd part of FD */ 755 #define FLG_REL_DISP 0x00004000 /* *disp* relocation */ 756 #define FLG_REL_STLS 0x00008000 /* IE TLS reference to */ 757 /* static TLS GOT index */ 758 #define FLG_REL_DTLS 0x00010000 /* GD TLS reference relative to */ 759 /* dynamic TLS GOT index */ 760 #define FLG_REL_MTLS 0x00020000 /* LD TLS reference against GOT */ 761 #define FLG_REL_STTLS 0x00040000 /* LE TLS reference directly */ 762 /* to static tls index */ 763 #define FLG_REL_TLSFIX 0x00080000 /* relocation points to TLS instr. */ 764 /* which needs updating */ 765 #define FLG_REL_RELA 0x00100000 /* descriptor captures a Rela */ 766 #define FLG_REL_GOTFIX 0x00200000 /* relocation points to GOTOP instr. */ 767 /* which needs updating */ 768 #define FLG_REL_NADDEND 0x00400000 /* Replace implicit addend in dest */ 769 /* with value in rel_raddend */ 770 /* Relevant to REL (i386) */ 771 /* relocations, not to RELA. */ 772 773 /* 774 * We often need the name of the symbol contained in a relocation descriptor 775 * for diagnostic or error output. This is usually the symbol name, but 776 * we substitute a constructed name in some cases. Hence, the name is 777 * generated on the fly by a private function within libld. This is the 778 * prototype for that function. 779 */ 780 typedef const char *(* rel_desc_sname_func_t)(Rel_desc *); 781 782 /* 783 * Header for a relocation descriptor cache buffer. 784 */ 785 struct rel_cachebuf { 786 Rel_desc *rc_end; 787 Rel_desc *rc_free; 788 Rel_desc rc_arr[1]; 789 }; 790 791 /* 792 * Header for a relocation auxiliary descriptor cache buffer. 793 */ 794 struct rel_aux_cachebuf { 795 Rel_aux *rac_end; 796 Rel_aux *rac_free; 797 Rel_aux rac_arr[1]; 798 }; 799 800 /* 801 * Convenience macro for traversing every relocation descriptor found within 802 * a given relocation cache, transparently handling the cache buffers and 803 * skipping any unallocated descriptors within the buffers. 804 * 805 * entry: 806 * _rel_cache - Relocate descriptor cache (Rel_cache) to traverse 807 * _idx - Aliste index variable for use by the macro 808 * _rcbp - Cache buffer pointer, for use by the macro 809 * _orsp - Rel_desc pointer, which will take on the value of a different 810 * relocation descriptor in the cache in each iteration. 811 * 812 * The caller must not assign new values to _idx, _rcbp, or _orsp within 813 * the scope of REL_CACHE_TRAVERSE. 814 */ 815 #define REL_CACHE_TRAVERSE(_rel_cache, _idx, _rcbp, _orsp) \ 816 for (APLIST_TRAVERSE((_rel_cache)->rc_list, _idx, _rcbp)) \ 817 for (_orsp = _rcbp->rc_arr; _orsp < _rcbp->rc_free; _orsp++) 818 819 /* 820 * Symbol value descriptor. For relocatable objects, each symbols value is 821 * its offset within its associated section. Therefore, to uniquely define 822 * each symbol within a relocatable object, record and sort the sh_offset and 823 * symbol value. This information is used to search for displacement 824 * relocations as part of copy relocation validation. 825 */ 826 typedef struct { 827 Addr ssv_value; 828 Sym_desc *ssv_sdp; 829 } Ssv_desc; 830 831 /* 832 * Input file processing structures. 833 */ 834 struct ifl_desc { /* input file descriptor */ 835 const char *ifl_name; /* full file name */ 836 const char *ifl_soname; /* shared object name */ 837 dev_t ifl_stdev; /* device id and inode number for .so */ 838 ino_t ifl_stino; /* multiple inclusion checks */ 839 Ehdr *ifl_ehdr; /* elf header describing this file */ 840 Elf *ifl_elf; /* elf descriptor for this file */ 841 Sym_desc **ifl_oldndx; /* original symbol table indices */ 842 Sym_desc *ifl_locs; /* symbol desc version of locals */ 843 Ssv_desc *ifl_sortsyms; /* sorted list of symbols by value */ 844 Word ifl_locscnt; /* no. of local symbols to process */ 845 Word ifl_symscnt; /* total no. of symbols to process */ 846 Word ifl_sortcnt; /* no. of sorted symbols to process */ 847 Word ifl_shnum; /* number of sections in file */ 848 Word ifl_shstrndx; /* index to .shstrtab */ 849 Word ifl_vercnt; /* number of versions in file */ 850 Half ifl_neededndx; /* index to NEEDED in .dyn section */ 851 Word ifl_flags; /* explicit/implicit reference */ 852 Is_desc **ifl_isdesc; /* isdesc[scn ndx] = Is_desc ptr */ 853 Sdf_desc *ifl_sdfdesc; /* control definition */ 854 Versym *ifl_versym; /* version symbol table array */ 855 Ver_index *ifl_verndx; /* verndx[ver ndx] = Ver_index */ 856 APlist *ifl_verdesc; /* version descriptor list */ 857 APlist *ifl_relsect; /* relocation section list */ 858 Alist *ifl_groups; /* SHT_GROUP section list */ 859 Cap_desc *ifl_caps; /* capabilities descriptor */ 860 }; 861 862 #define FLG_IF_CMDLINE 0x00000001 /* full filename specified from the */ 863 /* command line (no -l) */ 864 #define FLG_IF_NEEDED 0x00000002 /* shared object should be recorded */ 865 #define FLG_IF_DIRECT 0x00000004 /* establish direct bindings to this */ 866 /* object */ 867 #define FLG_IF_EXTRACT 0x00000008 /* file extracted from an archive */ 868 #define FLG_IF_VERNEED 0x00000010 /* version dependency information is */ 869 /* required */ 870 #define FLG_IF_DEPREQD 0x00000020 /* dependency is required to satisfy */ 871 /* symbol references */ 872 #define FLG_IF_NEEDSTR 0x00000040 /* dependency specified by -Nn */ 873 /* flag */ 874 #define FLG_IF_IGNORE 0x00000080 /* ignore unused dependencies */ 875 #define FLG_IF_NODIRECT 0x00000100 /* object contains symbols that */ 876 /* cannot be directly bound to */ 877 #define FLG_IF_LAZYLD 0x00000200 /* dependency should be lazy loaded */ 878 #define FLG_IF_GRPPRM 0x00000400 /* dependency establishes a group */ 879 #define FLG_IF_DISPPEND 0x00000800 /* displacement relocation done */ 880 /* in the ld time. */ 881 #define FLG_IF_DISPDONE 0x00001000 /* displacement relocation done */ 882 /* at the run time */ 883 #define FLG_IF_MAPFILE 0x00002000 /* file is a mapfile */ 884 #define FLG_IF_HSTRTAB 0x00004000 /* file has a string section */ 885 #define FLG_IF_FILEREF 0x00008000 /* file contains a section which */ 886 /* is included in the output */ 887 /* allocatable image */ 888 #define FLG_IF_GNUVER 0x00010000 /* file used GNU-style versioning */ 889 #define FLG_IF_ORDERED 0x00020000 /* ordered section processing */ 890 /* required */ 891 #define FLG_IF_OTOSCAP 0x00040000 /* convert object capabilities to */ 892 /* symbol capabilities */ 893 #define FLG_IF_DEFERRED 0x00080000 /* dependency is deferred */ 894 #define FLG_IF_RTLDINF 0x00100000 /* dependency has DT_SUNW_RTLTINF set */ 895 #define FLG_IF_GROUPS 0x00200000 /* input file has groups to process */ 896 897 /* 898 * Symbol states that require the generation of a DT_POSFLAG_1 .dynamic entry. 899 */ 900 #define MSK_IF_POSFLAG1 (FLG_IF_LAZYLD | FLG_IF_GRPPRM | FLG_IF_DEFERRED) 901 902 /* 903 * Symbol states that require an associated Syminfo entry. 904 */ 905 #define MSK_IF_SYMINFO (FLG_IF_LAZYLD | FLG_IF_DIRECT | FLG_IF_DEFERRED) 906 907 908 struct is_desc { /* input section descriptor */ 909 const char *is_name; /* original section name */ 910 const char *is_sym_name; /* NULL, or name string to use for */ 911 /* related STT_SECTION symbols */ 912 Shdr *is_shdr; /* the elf section header */ 913 Ifl_desc *is_file; /* infile desc for this section */ 914 Os_desc *is_osdesc; /* new output section for this */ 915 /* input section */ 916 Elf_Data *is_indata; /* input sections raw data */ 917 Is_desc *is_symshndx; /* related SHT_SYM_SHNDX section */ 918 Is_desc *is_comdatkeep; /* If COMDAT section is discarded, */ 919 /* this is section that was kept */ 920 Word is_scnndx; /* original section index in file */ 921 Word is_ordndx; /* index for section. Used to decide */ 922 /* where to insert section when */ 923 /* reordering sections */ 924 Word is_keyident; /* key for SHF_{ORDERED|LINK_ORDER} */ 925 /* processing and ident used for */ 926 /* placing/ordering sections */ 927 Word is_flags; /* Various flags */ 928 }; 929 930 #define FLG_IS_ORDERED 0x0001 /* this is a SHF_ORDERED section */ 931 #define FLG_IS_KEY 0x0002 /* section requires sort keys */ 932 #define FLG_IS_DISCARD 0x0004 /* section is to be discarded */ 933 #define FLG_IS_RELUPD 0x0008 /* symbol defined here may have moved */ 934 #define FLG_IS_SECTREF 0x0010 /* section has been referenced */ 935 #define FLG_IS_GDATADEF 0x0020 /* section contains global data sym */ 936 #define FLG_IS_EXTERNAL 0x0040 /* isp from a user file */ 937 #define FLG_IS_INSTRMRG 0x0080 /* Usable SHF_MERGE|SHF_STRINGS sec */ 938 #define FLG_IS_GNSTRMRG 0x0100 /* Generated mergeable string section */ 939 940 #define FLG_IS_PLACE 0x0400 /* section requires to be placed */ 941 #define FLG_IS_COMDAT 0x0800 /* section is COMDAT */ 942 #define FLG_IS_EHFRAME 0x1000 /* section is .eh_frame */ 943 944 /* 945 * Output sections contain lists of input sections that are assigned to them. 946 * These items fall into 4 categories: 947 * BEFORE - Ordered sections that specify SHN_BEFORE, in input order. 948 * ORDERED - Ordered sections that are sorted using unsorted sections 949 * as the sort key. 950 * DEFAULT - Sections that are placed into the output section 951 * in input order. 952 * AFTER - Ordered sections that specify SHN_AFTER, in input order. 953 */ 954 #define OS_ISD_BEFORE 0 955 #define OS_ISD_ORDERED 1 956 #define OS_ISD_DEFAULT 2 957 #define OS_ISD_AFTER 3 958 #define OS_ISD_NUM 4 959 typedef APlist *os_isdecs_arr[OS_ISD_NUM]; 960 961 /* 962 * Convenience macro for traversing every input section associated 963 * with a given output section. The primary benefit of this macro 964 * is that it preserves a precious level of code indentation in the 965 * code that uses it. 966 */ 967 #define OS_ISDESCS_TRAVERSE(_list_idx, _osp, _idx, _isp) \ 968 for (_list_idx = 0; _list_idx < OS_ISD_NUM; _list_idx++) \ 969 for (APLIST_TRAVERSE(_osp->os_isdescs[_list_idx], _idx, _isp)) 970 971 972 /* 973 * Map file and output file processing structures 974 */ 975 struct os_desc { /* Output section descriptor */ 976 const char *os_name; /* the section name */ 977 Elf_Scn *os_scn; /* the elf section descriptor */ 978 Shdr *os_shdr; /* the elf section header */ 979 Os_desc *os_relosdesc; /* the output relocation section */ 980 APlist *os_relisdescs; /* reloc input section descriptors */ 981 /* for this output section */ 982 os_isdecs_arr os_isdescs; /* lists of input sections in output */ 983 APlist *os_mstrisdescs; /* FLG_IS_INSTRMRG input sections */ 984 Sg_desc *os_sgdesc; /* segment os_desc is placed on */ 985 Elf_Data *os_outdata; /* output sections raw data */ 986 avl_tree_t *os_comdats; /* AVL tree of COMDAT input sections */ 987 /* associated to output section */ 988 Word os_identndx; /* section identifier for input */ 989 /* section processing, followed */ 990 /* by section symbol index */ 991 Word os_ordndx; /* index for section. Used to decide */ 992 /* where to insert section when */ 993 /* reordering sections */ 994 Xword os_szoutrels; /* size of output relocation section */ 995 uint_t os_namehash; /* hash on section name */ 996 uchar_t os_flags; /* various flags */ 997 }; 998 999 #define FLG_OS_KEY 0x01 /* section requires sort keys */ 1000 #define FLG_OS_OUTREL 0x02 /* output rel against this section */ 1001 #define FLG_OS_SECTREF 0x04 /* isps are not affected by -zignore */ 1002 #define FLG_OS_EHFRAME 0x08 /* section is .eh_frame */ 1003 1004 /* 1005 * The sg_id field of the segment descriptor is used to establish the default 1006 * order for program headers and segments in the output object. Segments are 1007 * ordered according to the following SGID values that classify them based on 1008 * their attributes. The initial set of built in segments are in this order, 1009 * and new mapfile defined segments are inserted into these groups. Within a 1010 * given SGID group, the position of new segments depends on the syntax 1011 * version of the mapfile that creates them. Version 1 (original sysv) 1012 * mapfiles place the new segment at the head of their group (reverse creation 1013 * order). The newer syntax places them at the end, following the others 1014 * (creation order). 1015 * 1016 * Note that any new segments must always be added after PT_PHDR and 1017 * PT_INTERP (refer Generic ABI, Page 5-4). 1018 */ 1019 #define SGID_PHDR 0 /* PT_PHDR */ 1020 #define SGID_INTERP 1 /* PT_INTERP */ 1021 #define SGID_SUNWCAP 2 /* PT_SUNWCAP */ 1022 #define SGID_TEXT 3 /* PT_LOAD */ 1023 #define SGID_DATA 4 /* PT_LOAD */ 1024 #define SGID_BSS 5 /* PT_LOAD */ 1025 #if defined(_ELF64) 1026 #define SGID_LRODATA 6 /* PT_LOAD (amd64-only) */ 1027 #define SGID_LDATA 7 /* PT_LOAD (amd64-only) */ 1028 #endif 1029 #define SGID_TEXT_EMPTY 8 /* PT_LOAD, reserved (?E in version 1 syntax) */ 1030 #define SGID_NULL_EMPTY 9 /* PT_NULL, reserved (?E in version 1 syntax) */ 1031 #define SGID_DYN 10 /* PT_DYNAMIC */ 1032 #define SGID_DTRACE 11 /* PT_SUNWDTRACE */ 1033 #define SGID_TLS 12 /* PT_TLS */ 1034 #define SGID_UNWIND 13 /* PT_SUNW_UNWIND */ 1035 #define SGID_SUNWSTACK 14 /* PT_SUNWSTACK */ 1036 #define SGID_NOTE 15 /* PT_NOTE */ 1037 #define SGID_NULL 16 /* PT_NULL, mapfile defined empty phdr slots */ 1038 /* for use by post processors */ 1039 #define SGID_EXTRA 17 /* PT_NULL (final catchall) */ 1040 1041 typedef Half sg_flags_t; 1042 struct sg_desc { /* output segment descriptor */ 1043 Word sg_id; /* segment identifier (for sorting) */ 1044 Phdr sg_phdr; /* segment header for output file */ 1045 const char *sg_name; /* segment name for PT_LOAD, PT_NOTE, */ 1046 /* and PT_NULL, otherwise NULL */ 1047 Xword sg_round; /* data rounding required (mapfile) */ 1048 Xword sg_length; /* maximum segment length; if 0 */ 1049 /* segment is not specified */ 1050 APlist *sg_osdescs; /* list of output section descriptors */ 1051 APlist *sg_is_order; /* list of entry criteria */ 1052 /* giving input section order */ 1053 Alist *sg_os_order; /* list specifying output section */ 1054 /* ordering for the segment */ 1055 sg_flags_t sg_flags; 1056 APlist *sg_sizesym; /* size symbols for this segment */ 1057 Xword sg_align; /* LCM of sh_addralign */ 1058 Elf_Scn *sg_fscn; /* the SCN of the first section. */ 1059 avl_node_t sg_avlnode; /* AVL book-keeping */ 1060 }; 1061 1062 #define FLG_SG_P_VADDR 0x0001 /* p_vaddr segment attribute set */ 1063 #define FLG_SG_P_PADDR 0x0002 /* p_paddr segment attribute set */ 1064 #define FLG_SG_LENGTH 0x0004 /* length segment attribute set */ 1065 #define FLG_SG_P_ALIGN 0x0008 /* p_align segment attribute set */ 1066 #define FLG_SG_ROUND 0x0010 /* round segment attribute set */ 1067 #define FLG_SG_P_FLAGS 0x0020 /* p_flags segment attribute set */ 1068 #define FLG_SG_P_TYPE 0x0040 /* p_type segment attribute set */ 1069 #define FLG_SG_IS_ORDER 0x0080 /* input section ordering is required */ 1070 /* for this segment. */ 1071 #define FLG_SG_NOHDR 0x0100 /* don't map ELF or phdrs into */ 1072 /* this segment */ 1073 #define FLG_SG_EMPTY 0x0200 /* an empty segment specification */ 1074 /* no input sections will be */ 1075 /* associated to this section */ 1076 #define FLG_SG_KEY 0x0400 /* segment requires sort keys */ 1077 #define FLG_SG_NODISABLE 0x0800 /* FLG_SG_DISABLED is not allowed on */ 1078 /* this segment */ 1079 #define FLG_SG_DISABLED 0x1000 /* this segment is disabled */ 1080 #define FLG_SG_PHREQ 0x2000 /* this segment requires a program */ 1081 /* header */ 1082 #define FLG_SG_ORDERED 0x4000 /* SEGMENT_ORDER segment */ 1083 1084 struct sec_order { 1085 const char *sco_secname; /* section name to be ordered */ 1086 Half sco_flags; 1087 }; 1088 1089 #define FLG_SGO_USED 0x0001 /* was ordering used? */ 1090 1091 typedef Half ec_flags_t; 1092 struct ent_desc { /* input section entrance criteria */ 1093 const char *ec_name; /* entrace criteria name, or NULL */ 1094 Alist *ec_files; /* files from which to accept */ 1095 /* sections */ 1096 const char *ec_is_name; /* input section name to match */ 1097 /* (NULL if none) */ 1098 Word ec_type; /* section type */ 1099 Word ec_attrmask; /* section attribute mask (AWX) */ 1100 Word ec_attrbits; /* sections attribute bits */ 1101 Sg_desc *ec_segment; /* output segment to enter if matched */ 1102 Word ec_ordndx; /* index to determine where section */ 1103 /* meeting this criteria should */ 1104 /* inserted. Used for reordering */ 1105 /* of sections. */ 1106 ec_flags_t ec_flags; 1107 avl_node_t ec_avlnode; /* AVL book-keeping */ 1108 }; 1109 1110 #define FLG_EC_BUILTIN 0x0001 /* built in descriptor */ 1111 #define FLG_EC_USED 0x0002 /* entrance criteria met? */ 1112 #define FLG_EC_CATCHALL 0x0004 /* Catches any section */ 1113 1114 /* 1115 * Ent_desc_file is the type of element maintained in the ec_files Alist 1116 * of an entrance criteria descriptor. Each item maintains one file 1117 * path, and a set of flags that specify the type of comparison it implies, 1118 * and other information about it. The comparison type is maintained in 1119 * the bottom byte of the flags. 1120 */ 1121 #define TYP_ECF_MASK 0x00ff /* Comparison type mask */ 1122 #define TYP_ECF_PATH 0 /* Compare to file path */ 1123 #define TYP_ECF_BASENAME 1 /* Compare to file basename */ 1124 #define TYP_ECF_OBJNAME 2 /* Compare to regular file basename, */ 1125 /* or to archive member name */ 1126 #define TYP_ECF_NUM 3 1127 1128 #define FLG_ECF_ARMEMBER 0x0100 /* name includes archive member */ 1129 1130 typedef struct { 1131 Word edf_flags; /* Type of comparison */ 1132 const char *edf_name; /* String to compare to */ 1133 size_t edf_name_len; /* strlen(edf_name) */ 1134 } Ent_desc_file; 1135 1136 /* 1137 * One structure is allocated for a move entry, and associated to the symbol 1138 * against which a move is targeted. 1139 */ 1140 typedef struct { 1141 Move *md_move; /* original Move entry */ 1142 Xword md_start; /* start position */ 1143 Xword md_len; /* length of initialization */ 1144 Word md_oidx; /* output Move entry index */ 1145 } Mv_desc; 1146 1147 /* 1148 * Symbol descriptor. 1149 */ 1150 typedef Lword sd_flag_t; 1151 struct sym_desc { 1152 Alist *sd_GOTndxs; /* list of associated GOT entries */ 1153 Sym *sd_sym; /* pointer to symbol table entry */ 1154 Sym *sd_osym; /* copy of the original symbol entry */ 1155 /* used only for local partial */ 1156 Alist *sd_move; /* move information associated with a */ 1157 /* partially initialized symbol */ 1158 const char *sd_name; /* symbols name */ 1159 Ifl_desc *sd_file; /* file where symbol is taken */ 1160 Is_desc *sd_isc; /* input section of symbol definition */ 1161 Sym_aux *sd_aux; /* auxiliary global symbol info. */ 1162 Word sd_symndx; /* index in output symbol table */ 1163 Word sd_shndx; /* sect. index sym is associated w/ */ 1164 sd_flag_t sd_flags; /* state flags */ 1165 Half sd_ref; /* reference definition of symbol */ 1166 }; 1167 1168 /* 1169 * The auxiliary symbol descriptor contains the additional information (beyond 1170 * the symbol descriptor) required to process global symbols. These symbols are 1171 * accessed via an internal symbol hash table where locality of reference is 1172 * important for performance. 1173 */ 1174 struct sym_aux { 1175 APlist *sa_dfiles; /* files where symbol is defined */ 1176 Sym sa_sym; /* copy of symtab entry */ 1177 const char *sa_vfile; /* first unavailable definition */ 1178 const char *sa_rfile; /* file with first symbol referenced */ 1179 Word sa_hash; /* the pure hash value of symbol */ 1180 Word sa_PLTndx; /* index into PLT for symbol */ 1181 Word sa_PLTGOTndx; /* GOT entry indx for PLT indirection */ 1182 Word sa_linkndx; /* index of associated symbol from */ 1183 /* ET_DYN file */ 1184 Half sa_symspec; /* special symbol ids */ 1185 Half sa_overndx; /* output file versioning index */ 1186 Half sa_dverndx; /* dependency versioning index */ 1187 }; 1188 1189 /* 1190 * Nodes used to track symbols in the global AVL symbol dictionary. 1191 */ 1192 struct sym_avlnode { 1193 avl_node_t sav_node; /* AVL node */ 1194 Word sav_hash; /* symbol hash value */ 1195 const char *sav_name; /* symbol name */ 1196 Sym_desc *sav_sdp; /* symbol descriptor */ 1197 }; 1198 1199 /* 1200 * These are the ids for processing of `Special symbols'. They are used 1201 * to set the sym->sd_aux->sa_symspec field. 1202 */ 1203 #define SDAUX_ID_ETEXT 1 /* etext && _etext symbol */ 1204 #define SDAUX_ID_EDATA 2 /* edata && _edata symbol */ 1205 #define SDAUX_ID_END 3 /* end, _end, && _END_ symbol */ 1206 #define SDAUX_ID_DYN 4 /* DYNAMIC && _DYNAMIC symbol */ 1207 #define SDAUX_ID_PLT 5 /* _PROCEDURE_LINKAGE_TABLE_ symbol */ 1208 #define SDAUX_ID_GOT 6 /* _GLOBAL_OFFSET_TABLE_ symbol */ 1209 #define SDAUX_ID_START 7 /* START_ && _START_ symbol */ 1210 1211 /* 1212 * Flags for sym_desc.sd_flags 1213 */ 1214 #define FLG_SY_MVTOCOMM 0x00000001 /* assign symbol to common (.bss) */ 1215 /* this is a result of a */ 1216 /* copy reloc against sym */ 1217 #define FLG_SY_GLOBREF 0x00000002 /* a global reference has been seen */ 1218 #define FLG_SY_WEAKDEF 0x00000004 /* a weak definition has been used */ 1219 #define FLG_SY_CLEAN 0x00000008 /* `Sym' entry points to original */ 1220 /* input file (read-only). */ 1221 #define FLG_SY_UPREQD 0x00000010 /* symbol value update is required, */ 1222 /* either it's used as an entry */ 1223 /* point or for relocation, but */ 1224 /* it must be updated even if */ 1225 /* the -s flag is in effect */ 1226 #define FLG_SY_NOTAVAIL 0x00000020 /* symbol is not available to the */ 1227 /* application either because it */ 1228 /* originates from an implicitly */ 1229 /* referenced shared object, or */ 1230 /* because it is not part of a */ 1231 /* specified version. */ 1232 #define FLG_SY_REDUCED 0x00000040 /* a global is reduced to local */ 1233 #define FLG_SY_VERSPROM 0x00000080 /* version definition has been */ 1234 /* promoted to output file */ 1235 #define FLG_SY_PROT 0x00000100 /* stv_protected visibility seen */ 1236 #define FLG_SY_MAPREF 0x00000200 /* symbol reference generated by user */ 1237 /* from mapfile */ 1238 #define FLG_SY_REFRSD 0x00000400 /* symbols sd_ref has been raised */ 1239 /* due to a copy-relocs */ 1240 /* weak-strong pairing */ 1241 #define FLG_SY_INTPOSE 0x00000800 /* symbol defines an interposer */ 1242 #define FLG_SY_INVALID 0x00001000 /* unwanted/erroneous symbol */ 1243 #define FLG_SY_SMGOT 0x00002000 /* small got index assigned to symbol */ 1244 /* sparc only */ 1245 #define FLG_SY_PARENT 0x00004000 /* symbol to be found in parent */ 1246 /* only used with direct bindings */ 1247 #define FLG_SY_LAZYLD 0x00008000 /* symbol to cause lazyloading of */ 1248 /* parent object */ 1249 #define FLG_SY_ISDISC 0x00010000 /* symbol is a member of a DISCARDED */ 1250 /* section (COMDAT) */ 1251 #define FLG_SY_PAREXPN 0x00020000 /* partially init. symbol to be */ 1252 /* expanded */ 1253 #define FLG_SY_PLTPAD 0x00040000 /* pltpadding has been allocated for */ 1254 /* this symbol */ 1255 #define FLG_SY_REGSYM 0x00080000 /* REGISTER symbol (sparc only) */ 1256 #define FLG_SY_SOFOUND 0x00100000 /* compared against an SO definition */ 1257 #define FLG_SY_EXTERN 0x00200000 /* symbol is external, allows -zdefs */ 1258 /* error suppression */ 1259 #define FLG_SY_MAPUSED 0x00400000 /* mapfile symbol used (occurred */ 1260 /* within a relocatable object) */ 1261 #define FLG_SY_COMMEXP 0x00800000 /* COMMON symbol which has been */ 1262 /* allocated */ 1263 #define FLG_SY_CMDREF 0x01000000 /* symbol was referenced from the */ 1264 /* command line. (ld -u <>, */ 1265 /* ld -zrtldinfo=<>, ...) */ 1266 #define FLG_SY_SPECSEC 0x02000000 /* section index is reserved value */ 1267 /* ABS, COMMON, ... */ 1268 #define FLG_SY_TENTSYM 0x04000000 /* tentative symbol */ 1269 #define FLG_SY_VISIBLE 0x08000000 /* symbols visibility determined */ 1270 #define FLG_SY_STDFLTR 0x10000000 /* symbol is a standard filter */ 1271 #define FLG_SY_AUXFLTR 0x20000000 /* symbol is an auxiliary filter */ 1272 #define FLG_SY_DYNSORT 0x40000000 /* req. in dyn[sym|tls]sort section */ 1273 #define FLG_SY_NODYNSORT 0x80000000 /* excluded from dyn[sym_tls]sort sec */ 1274 1275 #define FLG_SY_DEFAULT 0x0000100000000 /* global symbol, default */ 1276 #define FLG_SY_SINGLE 0x0000200000000 /* global symbol, singleton defined */ 1277 #define FLG_SY_PROTECT 0x0000400000000 /* global symbol, protected defined */ 1278 #define FLG_SY_EXPORT 0x0000800000000 /* global symbol, exported defined */ 1279 1280 #define MSK_SY_GLOBAL \ 1281 (FLG_SY_DEFAULT | FLG_SY_SINGLE | FLG_SY_PROTECT | FLG_SY_EXPORT) 1282 /* this mask indicates that the */ 1283 /* symbol has been explicitly */ 1284 /* defined within a mapfile */ 1285 /* definition, and is a candidate */ 1286 /* for versioning */ 1287 1288 #define FLG_SY_HIDDEN 0x0001000000000 /* global symbol, reduce to local */ 1289 #define FLG_SY_ELIM 0x0002000000000 /* global symbol, eliminate */ 1290 #define FLG_SY_IGNORE 0x0004000000000 /* global symbol, ignored */ 1291 1292 #define MSK_SY_LOCAL (FLG_SY_HIDDEN | FLG_SY_ELIM | FLG_SY_IGNORE) 1293 /* this mask allows all local state */ 1294 /* flags to be removed when the */ 1295 /* symbol is copy relocated */ 1296 1297 #define FLG_SY_EXPDEF 0x0008000000000 /* symbol visibility defined */ 1298 /* explicitly */ 1299 1300 #define MSK_SY_NOAUTO (FLG_SY_SINGLE | FLG_SY_EXPORT | FLG_SY_EXPDEF) 1301 /* this mask indicates that the */ 1302 /* symbol is not a candidate for */ 1303 /* auto-reduction/elimination */ 1304 1305 #define FLG_SY_MAPFILE 0x0010000000000 /* symbol attribute defined in a */ 1306 /* mapfile */ 1307 #define FLG_SY_DIR 0x0020000000000 /* global symbol, direct bindings */ 1308 #define FLG_SY_NDIR 0x0040000000000 /* global symbol, nondirect bindings */ 1309 #define FLG_SY_OVERLAP 0x0080000000000 /* move entry overlap detected */ 1310 #define FLG_SY_CAP 0x0100000000000 /* symbol is associated with */ 1311 /* capabilities */ 1312 #define FLG_SY_DEFERRED 0x0200000000000 /* symbol should not be bound to */ 1313 /* during BIND_NOW relocations */ 1314 1315 /* 1316 * A symbol can only be truly hidden if it is not a capabilities symbol. 1317 */ 1318 #define SYM_IS_HIDDEN(_sdp) \ 1319 (((_sdp)->sd_flags & (FLG_SY_HIDDEN | FLG_SY_CAP)) == FLG_SY_HIDDEN) 1320 1321 /* 1322 * Create a mask for (sym.st_other & visibility) since the gABI does not yet 1323 * define a ELF*_ST_OTHER macro. 1324 */ 1325 #define MSK_SYM_VISIBILITY 0x7 1326 1327 /* 1328 * Structure to manage the shared object definition lists. There are two lists 1329 * that use this structure: 1330 * 1331 * - ofl_soneed; maintain the list of implicitly required dependencies 1332 * (ie. shared objects needed by other shared objects). These definitions 1333 * may include RPATH's required to locate the dependencies, and any 1334 * version requirements. 1335 * 1336 * - ofl_socntl; maintains the shared object control definitions. These are 1337 * provided by the user (via a mapfile) and are used to indicate any 1338 * version control requirements. 1339 */ 1340 struct sdf_desc { 1341 const char *sdf_name; /* the shared objects file name */ 1342 char *sdf_rpath; /* library search path DT_RPATH */ 1343 const char *sdf_rfile; /* referencing file for diagnostics */ 1344 Ifl_desc *sdf_file; /* the final input file descriptor */ 1345 Alist *sdf_vers; /* list of versions that are required */ 1346 /* from this object */ 1347 Alist *sdf_verneed; /* list of VERNEEDS to create for */ 1348 /* object via mapfile ADDVERS */ 1349 Word sdf_flags; 1350 }; 1351 1352 #define FLG_SDF_SELECT 0x01 /* version control selection required */ 1353 #define FLG_SDF_VERIFY 0x02 /* version definition verification */ 1354 /* required */ 1355 #define FLG_SDF_ADDVER 0x04 /* add VERNEED references */ 1356 1357 /* 1358 * Structure to manage shared object version usage requirements. 1359 */ 1360 struct sdv_desc { 1361 const char *sdv_name; /* version name */ 1362 const char *sdv_ref; /* versions reference */ 1363 Word sdv_flags; /* flags */ 1364 }; 1365 1366 #define FLG_SDV_MATCHED 0x01 /* VERDEF found and matched */ 1367 1368 /* 1369 * Structures to manage versioning information. Two versioning structures are 1370 * defined: 1371 * 1372 * - a version descriptor maintains a linked list of versions and their 1373 * associated dependencies. This is used to build the version definitions 1374 * for an image being created (see map_symbol), and to determine the 1375 * version dependency graph for any input files that are versioned. 1376 * 1377 * - a version index array contains each version of an input file that is 1378 * being processed. It informs us which versions are available for 1379 * binding, and is used to generate any version dependency information. 1380 */ 1381 struct ver_desc { 1382 const char *vd_name; /* version name */ 1383 Ifl_desc *vd_file; /* file that defined version */ 1384 Word vd_hash; /* hash value of name */ 1385 Half vd_ndx; /* coordinates with symbol index */ 1386 Half vd_flags; /* version information */ 1387 APlist *vd_deps; /* version dependencies */ 1388 Ver_desc *vd_ref; /* dependency's first reference */ 1389 }; 1390 1391 struct ver_index { 1392 const char *vi_name; /* dependency version name */ 1393 Half vi_flags; /* communicates availability */ 1394 Half vi_overndx; /* index assigned to this version in */ 1395 /* output object Verneed section */ 1396 Ver_desc *vi_desc; /* cross reference to descriptor */ 1397 }; 1398 1399 /* 1400 * Define any internal version descriptor flags ([vd|vi]_flags). Note that the 1401 * first byte is reserved for user visible flags (refer VER_FLG's in link.h). 1402 */ 1403 #define MSK_VER_USER 0x0f /* mask for user visible flags */ 1404 1405 #define FLG_VER_AVAIL 0x10 /* version is available for binding */ 1406 #define FLG_VER_REFER 0x20 /* version has been referenced */ 1407 #define FLG_VER_CYCLIC 0x40 /* a member of cyclic dependency */ 1408 1409 /* 1410 * isalist(1) descriptor - used to break an isalist string into its component 1411 * options. 1412 */ 1413 struct isa_opt { 1414 char *isa_name; /* individual isa option name */ 1415 size_t isa_namesz; /* and associated size */ 1416 }; 1417 1418 struct isa_desc { 1419 char *isa_list; /* sysinfo(SI_ISALIST) list */ 1420 size_t isa_listsz; /* and associated size */ 1421 Isa_opt *isa_opt; /* table of individual isa options */ 1422 size_t isa_optno; /* and associated number */ 1423 }; 1424 1425 /* 1426 * uname(2) descriptor - used to break a utsname structure into its component 1427 * options (at least those that we're interested in). 1428 */ 1429 struct uts_desc { 1430 char *uts_osname; /* operating system name */ 1431 size_t uts_osnamesz; /* and associated size */ 1432 char *uts_osrel; /* operating system release */ 1433 size_t uts_osrelsz; /* and associated size */ 1434 }; 1435 1436 /* 1437 * SHT_GROUP descriptor - used to track group sections at the global 1438 * level to resolve conflicts and determine which to keep. 1439 */ 1440 struct group_desc { 1441 Is_desc *gd_isc; /* input section descriptor */ 1442 Is_desc *gd_oisc; /* overriding input section */ 1443 /* descriptor when discarded */ 1444 const char *gd_name; /* group name (signature symbol) */ 1445 Word *gd_data; /* data for group section */ 1446 size_t gd_cnt; /* number of entries in group data */ 1447 }; 1448 1449 /* 1450 * Indexes into the ld_support_funcs[] table. 1451 */ 1452 typedef enum { 1453 LDS_VERSION = 0, /* Must be first and have value 0 */ 1454 LDS_INPUT_DONE, 1455 LDS_START, 1456 LDS_ATEXIT, 1457 LDS_OPEN, 1458 LDS_FILE, 1459 LDS_INSEC, 1460 LDS_SEC, 1461 LDS_NUM 1462 } Support_ndx; 1463 1464 /* 1465 * Structure to manage archive member caching. Each archive has an archive 1466 * descriptor (Ar_desc) associated with it. This contains pointers to the 1467 * archive symbol table (obtained by elf_getarsyms(3e)) and an auxiliary 1468 * structure (Ar_uax[]) that parallels this symbol table. The member element 1469 * of this auxiliary table indicates whether the archive member associated with 1470 * the symbol offset has already been extracted (AREXTRACTED) or partially 1471 * processed (refer process_member()). 1472 */ 1473 typedef struct ar_mem { 1474 Elf *am_elf; /* elf descriptor for this member */ 1475 const char *am_name; /* members name */ 1476 const char *am_path; /* path (ie. lib(foo.o)) */ 1477 Sym *am_syms; /* start of global symbols */ 1478 char *am_strs; /* associated string table start */ 1479 Xword am_symn; /* no. of global symbols */ 1480 } Ar_mem; 1481 1482 typedef struct ar_aux { 1483 Sym_desc *au_syms; /* internal symbol descriptor */ 1484 Ar_mem *au_mem; /* associated member */ 1485 } Ar_aux; 1486 1487 #define FLG_ARMEM_PROC (Ar_mem *)-1 1488 1489 typedef struct ar_desc { 1490 const char *ad_name; /* archive file name */ 1491 Elf *ad_elf; /* elf descriptor for the archive */ 1492 Elf_Arsym *ad_start; /* archive symbol table start */ 1493 Ar_aux *ad_aux; /* auxiliary symbol information */ 1494 dev_t ad_stdev; /* device id and inode number for */ 1495 ino_t ad_stino; /* multiple inclusion checks */ 1496 ofl_flag_t ad_flags; /* archive specific cmd line flags */ 1497 } Ar_desc; 1498 1499 /* 1500 * Define any archive descriptor flags. NOTE, make sure they do not clash with 1501 * any output file descriptor archive extraction flags, as these are saved in 1502 * the same entry (see MSK_OF1_ARCHIVE). 1503 */ 1504 #define FLG_ARD_EXTRACT 0x00010000 /* archive member has been extracted */ 1505 1506 /* Mapfile versions supported by libld */ 1507 #define MFV_NONE 0 /* Not a valid version */ 1508 #define MFV_SYSV 1 /* Original System V syntax */ 1509 #define MFV_SOLARIS 2 /* Solaris mapfile syntax */ 1510 #define MFV_NUM 3 /* # of mapfile versions */ 1511 1512 1513 /* 1514 * Function Declarations. 1515 */ 1516 #if defined(_ELF64) 1517 1518 #define ld_create_outfile ld64_create_outfile 1519 #define ld_ent_setup ld64_ent_setup 1520 #define ld_init_strings ld64_init_strings 1521 #define ld_init_target ld64_init_target 1522 #define ld_make_sections ld64_make_sections 1523 #define ld_main ld64_main 1524 #define ld_ofl_cleanup ld64_ofl_cleanup 1525 #define ld_process_mem ld64_process_mem 1526 #define ld_reloc_init ld64_reloc_init 1527 #define ld_reloc_process ld64_reloc_process 1528 #define ld_sym_validate ld64_sym_validate 1529 #define ld_update_outfile ld64_update_outfile 1530 1531 #else 1532 1533 #define ld_create_outfile ld32_create_outfile 1534 #define ld_ent_setup ld32_ent_setup 1535 #define ld_init_strings ld32_init_strings 1536 #define ld_init_target ld32_init_target 1537 #define ld_make_sections ld32_make_sections 1538 #define ld_main ld32_main 1539 #define ld_ofl_cleanup ld32_ofl_cleanup 1540 #define ld_process_mem ld32_process_mem 1541 #define ld_reloc_init ld32_reloc_init 1542 #define ld_reloc_process ld32_reloc_process 1543 #define ld_sym_validate ld32_sym_validate 1544 #define ld_update_outfile ld32_update_outfile 1545 1546 #endif 1547 1548 extern int ld_getopt(Lm_list *, int, int, char **); 1549 1550 extern int ld32_main(int, char **, Half); 1551 extern int ld64_main(int, char **, Half); 1552 1553 extern uintptr_t ld_create_outfile(Ofl_desc *); 1554 extern uintptr_t ld_ent_setup(Ofl_desc *, Xword); 1555 extern uintptr_t ld_init_strings(Ofl_desc *); 1556 extern int ld_init_target(Lm_list *, Half mach); 1557 extern uintptr_t ld_make_sections(Ofl_desc *); 1558 extern void ld_ofl_cleanup(Ofl_desc *); 1559 extern Ifl_desc *ld_process_mem(const char *, const char *, char *, 1560 size_t, Ofl_desc *, Rej_desc *); 1561 extern uintptr_t ld_reloc_init(Ofl_desc *); 1562 extern uintptr_t ld_reloc_process(Ofl_desc *); 1563 extern uintptr_t ld_sym_validate(Ofl_desc *); 1564 extern uintptr_t ld_update_outfile(Ofl_desc *); 1565 1566 #ifdef __cplusplus 1567 } 1568 #endif 1569 1570 #endif /* _LIBLD_H */ 1571