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 APlist *ofl_symasserts; /* assertions about symbols */ 411 /* from mapfiles */ 412 }; 413 414 #define FLG_OF_DYNAMIC 0x00000001 /* generate dynamic output module */ 415 #define FLG_OF_STATIC 0x00000002 /* generate static output module */ 416 #define FLG_OF_EXEC 0x00000004 /* generate an executable */ 417 #define FLG_OF_RELOBJ 0x00000008 /* generate a relocatable object */ 418 #define FLG_OF_SHAROBJ 0x00000010 /* generate a shared object */ 419 #define FLG_OF_BFLAG 0x00000020 /* do no special plt building: -b */ 420 #define FLG_OF_IGNENV 0x00000040 /* ignore LD_LIBRARY_PATH: -i */ 421 #define FLG_OF_STRIP 0x00000080 /* strip output: -s */ 422 #define FLG_OF_NOWARN 0x00000100 /* disable symbol warnings: -t */ 423 #define FLG_OF_NOUNDEF 0x00000200 /* allow no undefined symbols: -zdefs */ 424 #define FLG_OF_PURETXT 0x00000400 /* allow no text relocations: -ztext */ 425 #define FLG_OF_GENMAP 0x00000800 /* generate a memory map: -m */ 426 #define FLG_OF_DYNLIBS 0x00001000 /* dynamic input allowed: -Bdynamic */ 427 #define FLG_OF_SYMBOLIC 0x00002000 /* bind global symbols: -Bsymbolic */ 428 #define FLG_OF_ADDVERS 0x00004000 /* add version stamp: -Qy */ 429 #define FLG_OF_NOLDYNSYM 0x00008000 /* -znoldynsym set */ 430 #define FLG_OF_IS_ORDER 0x00010000 /* input section ordering within a */ 431 /* segment is required */ 432 #define FLG_OF_EC_FILES 0x00020000 /* Ent_desc exist w/non-NULL ec_files */ 433 #define FLG_OF_TEXTREL 0x00040000 /* text relocations have been found */ 434 #define FLG_OF_MULDEFS 0x00080000 /* multiple symbols are allowed */ 435 #define FLG_OF_TLSPHDR 0x00100000 /* a TLS program header is required */ 436 #define FLG_OF_BLDGOT 0x00200000 /* build GOT table */ 437 #define FLG_OF_VERDEF 0x00400000 /* record version definitions */ 438 #define FLG_OF_VERNEED 0x00800000 /* record version dependencies */ 439 #define FLG_OF_NOVERSEC 0x01000000 /* don't record version sections */ 440 #define FLG_OF_KEY 0x02000000 /* file requires sort keys */ 441 #define FLG_OF_PROCRED 0x04000000 /* process any symbol reductions by */ 442 /* effecting the symbol table */ 443 /* output and relocations */ 444 #define FLG_OF_SYMINFO 0x08000000 /* create a syminfo section */ 445 #define FLG_OF_AUX 0x10000000 /* ofl_filter is an auxiliary filter */ 446 #define FLG_OF_FATAL 0x20000000 /* fatal error during input */ 447 #define FLG_OF_WARN 0x40000000 /* warning during input processing. */ 448 #define FLG_OF_VERBOSE 0x80000000 /* -z verbose flag set */ 449 450 #define FLG_OF_MAPSYMB 0x000100000000 /* symbolic scope definition seen */ 451 #define FLG_OF_MAPGLOB 0x000200000000 /* global scope definition seen */ 452 #define FLG_OF_COMREL 0x000400000000 /* -z combreloc set, which enables */ 453 /* DT_RELACNT tracking, */ 454 #define FLG_OF_NOCOMREL 0x000800000000 /* -z nocombreloc set */ 455 #define FLG_OF_AUTOLCL 0x001000000000 /* automatically reduce unspecified */ 456 /* global symbols to locals */ 457 #define FLG_OF_AUTOELM 0x002000000000 /* automatically eliminate */ 458 /* unspecified global symbols */ 459 #define FLG_OF_REDLSYM 0x004000000000 /* reduce local symbols */ 460 #define FLG_OF_OS_ORDER 0x008000000000 /* output section ordering required */ 461 #define FLG_OF_OSABI 0x010000000000 /* tag object as ELFOSABI_SOLARIS */ 462 #define FLG_OF_ADJOSCNT 0x020000000000 /* adjust ofl_shdrcnt to accommodate */ 463 /* discarded sections */ 464 #define FLG_OF_OTOSCAP 0x040000000000 /* convert object capabilities to */ 465 /* symbol capabilities */ 466 #define FLG_OF_PTCAP 0x080000000000 /* PT_SUNWCAP required */ 467 #define FLG_OF_CAPSTRS 0x100000000000 /* capability strings are required */ 468 #define FLG_OF_EHFRAME 0x200000000000 /* output contains .eh_frame section */ 469 #define FLG_OF_FATWARN 0x400000000000 /* make warnings fatal */ 470 #define FLG_OF_ADEFLIB 0x800000000000 /* no libraries in default path */ 471 472 #define FLG_OF_KMOD 0x1000000000000 /* output is a kernel module */ 473 474 /* 475 * In the flags1 arena, establish any options that are applicable to archive 476 * extraction first, and associate a mask. These values are recorded with any 477 * archive descriptor so that they may be reset should the archive require a 478 * rescan to try and resolve undefined symbols. 479 */ 480 #define FLG_OF1_ALLEXRT 0x0000000001 /* extract all members from an */ 481 /* archive file */ 482 #define FLG_OF1_WEAKEXT 0x0000000002 /* allow archive extraction to */ 483 /* resolve weak references */ 484 #define MSK_OF1_ARCHIVE 0x0000000003 /* archive flags mask */ 485 486 #define FLG_OF1_NOINTRP 0x0000000008 /* -z nointerp flag set */ 487 #define FLG_OF1_ZDIRECT 0x0000000010 /* -z direct flag set */ 488 #define FLG_OF1_NDIRECT 0x0000000020 /* no-direct bindings specified */ 489 #define FLG_OF1_DEFERRED 0x0000000040 /* deferred dependency recording */ 490 491 #define FLG_OF1_RELDYN 0x0000000100 /* process .dynamic in rel obj */ 492 #define FLG_OF1_NRLXREL 0x0000000200 /* -z norelaxreloc flag set */ 493 #define FLG_OF1_RLXREL 0x0000000400 /* -z relaxreloc flag set */ 494 #define FLG_OF1_IGNORE 0x0000000800 /* ignore unused dependencies */ 495 #define FLG_OF1_NOSGHND 0x0000001000 /* -z nosighandler flag set */ 496 #define FLG_OF1_TEXTOFF 0x0000002000 /* text relocations are ok */ 497 #define FLG_OF1_ABSEXEC 0x0000004000 /* -zabsexec set */ 498 #define FLG_OF1_LAZYLD 0x0000008000 /* lazy loading of objects enabled */ 499 #define FLG_OF1_GRPPRM 0x0000010000 /* dependencies are to have */ 500 /* GROUPPERM enabled */ 501 502 #define FLG_OF1_NOPARTI 0x0000040000 /* -znopartial set */ 503 #define FLG_OF1_BSSOREL 0x0000080000 /* output relocation against bss */ 504 /* section */ 505 #define FLG_OF1_TLSOREL 0x0000100000 /* output relocation against .tlsbss */ 506 /* section */ 507 #define FLG_OF1_MEMORY 0x0000200000 /* produce a memory model */ 508 #define FLG_OF1_NGLBDIR 0x0000400000 /* no DT_1_DIRECT flag allowed */ 509 #define FLG_OF1_ENCDIFF 0x0000800000 /* host running linker has different */ 510 /* byte order than output object */ 511 #define FLG_OF1_VADDR 0x0001000000 /* a segment defines explicit vaddr */ 512 #define FLG_OF1_EXTRACT 0x0002000000 /* archive member has been extracted */ 513 #define FLG_OF1_RESCAN 0x0004000000 /* any archives should be rescanned */ 514 #define FLG_OF1_IGNPRC 0x0008000000 /* ignore processing required */ 515 #define FLG_OF1_NCSTTAB 0x0010000000 /* -znocompstrtab set */ 516 #define FLG_OF1_DONE 0x0020000000 /* link-editor processing complete */ 517 #define FLG_OF1_NONREG 0x0040000000 /* non-regular file specified as */ 518 /* the output file */ 519 #define FLG_OF1_ALNODIR 0x0080000000 /* establish NODIRECT for all */ 520 /* exported interfaces. */ 521 #define FLG_OF1_OVHWCAP1 0x0100000000 /* override CA_SUNW_HW_1 capabilities */ 522 #define FLG_OF1_OVSFCAP1 0x0200000000 /* override CA_SUNW_SF_1 capabilities */ 523 #define FLG_OF1_OVHWCAP2 0x0400000000 /* override CA_SUNW_HW_2 capabilities */ 524 #define FLG_OF1_OVMACHCAP 0x0800000000 /* override CA_SUNW_MACH capability */ 525 #define FLG_OF1_OVPLATCAP 0x1000000000 /* override CA_SUNW_PLAT capability */ 526 #define FLG_OF1_OVIDCAP 0x2000000000 /* override CA_SUNW_ID capability */ 527 528 /* 529 * Guidance flags. The flags with the FLG_OFG_NO_ prefix are used to suppress 530 * messages for a given category, and use the lower 28 bits of the word, 531 * The upper nibble is reserved for other guidance status. 532 */ 533 #define FLG_OFG_ENABLE 0x10000000 /* -z guidance option active */ 534 #define FLG_OFG_ISSUED 0x20000000 /* -z guidance message issued */ 535 536 #define FLG_OFG_NO_ALL 0x0fffffff /* disable all guidance */ 537 #define FLG_OFG_NO_DEFS 0x00000001 /* specify all dependencies */ 538 #define FLG_OFG_NO_DB 0x00000002 /* use direct bindings */ 539 #define FLG_OFG_NO_LAZY 0x00000004 /* be explicit about lazyload */ 540 #define FLG_OFG_NO_MF 0x00000008 /* use v2 mapfile syntax */ 541 #define FLG_OFG_NO_TEXT 0x00000010 /* verify pure text segment */ 542 #define FLG_OFG_NO_UNUSED 0x00000020 /* remove unused dependency */ 543 #define FLG_OFG_NO_ASSERTS 0x00000040 /* suggest mapfile assertions */ 544 545 /* 546 * Test to see if a guidance should be given for a given category 547 * or not. _no_flag is one of the FLG_OFG_NO_xxx flags. Returns TRUE 548 * if the guidance should be issued, and FALSE to remain silent. 549 */ 550 #define OFL_GUIDANCE(_ofl, _no_flag) (((_ofl)->ofl_guideflags & \ 551 (FLG_OFG_ENABLE | (_no_flag))) == FLG_OFG_ENABLE) 552 553 /* 554 * Test to see if the output file would allow the presence of 555 * a .dynsym section. 556 */ 557 #define OFL_ALLOW_DYNSYM(_ofl) (((_ofl)->ofl_flags & \ 558 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == FLG_OF_DYNAMIC) 559 560 /* 561 * Test to see if the output file would allow the presence of 562 * a .SUNW_ldynsym section. The requirements are that a .dynsym 563 * is allowed, and -znoldynsym has not been specified. Note that 564 * even if the answer is True (1), we will only generate one if there 565 * are local symbols that require it. 566 */ 567 #define OFL_ALLOW_LDYNSYM(_ofl) (((_ofl)->ofl_flags & \ 568 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ | FLG_OF_NOLDYNSYM)) == FLG_OF_DYNAMIC) 569 570 /* 571 * Test to see if relocation processing should be done. This is normally 572 * true, but can be disabled via the '-z noreloc' option. Note that 573 * relocatable objects are still relocated even if '-z noreloc' is present. 574 */ 575 #define OFL_DO_RELOC(_ofl) (((_ofl)->ofl_flags & FLG_OF_RELOBJ) || \ 576 !((_ofl)->ofl_dtflags_1 & DF_1_NORELOC)) 577 578 /* 579 * Determine whether a static executable is being built. 580 */ 581 #define OFL_IS_STATIC_EXEC(_ofl) (((_ofl)->ofl_flags & \ 582 (FLG_OF_STATIC | FLG_OF_EXEC)) == (FLG_OF_STATIC | FLG_OF_EXEC)) 583 584 /* 585 * Determine whether a static object is being built. This macro is used 586 * to select the appropriate string table, and symbol table that other 587 * sections need to reference. 588 */ 589 #define OFL_IS_STATIC_OBJ(_ofl) ((_ofl)->ofl_flags & \ 590 (FLG_OF_RELOBJ | FLG_OF_STATIC)) 591 592 /* 593 * Macros for counting symbol table entries. These are used to size symbol 594 * tables and associated sections (.syminfo, SUNW_capinfo, .hash, etc.) and 595 * set required sh_info entries (the offset to the first global symbol). 596 */ 597 #define SYMTAB_LOC_CNT(_ofl) /* local .symtab entries */ \ 598 (2 + /* NULL and STT_FILE */ \ 599 (_ofl)->ofl_shdrcnt + /* section symbol */ \ 600 (_ofl)->ofl_caploclcnt + /* local capabilities */ \ 601 (_ofl)->ofl_scopecnt + /* scoped symbols */ \ 602 (_ofl)->ofl_locscnt) /* standard locals */ 603 #define SYMTAB_ALL_CNT(_ofl) /* all .symtab entries */ \ 604 (SYMTAB_LOC_CNT(_ofl) + /* .symtab locals */ \ 605 (_ofl)->ofl_globcnt) /* standard globals */ 606 607 #define DYNSYM_LOC_CNT(_ofl) /* local .dynsym entries */ \ 608 (1 + /* NULL */ \ 609 (_ofl)->ofl_dynshdrcnt + /* section symbols */ \ 610 (_ofl)->ofl_caploclcnt + /* local capabilities */ \ 611 (_ofl)->ofl_lregsymcnt) /* local register symbols */ 612 #define DYNSYM_ALL_CNT(_ofl) /* all .dynsym entries */ \ 613 (DYNSYM_LOC_CNT(_ofl) + /* .dynsym locals */ \ 614 (_ofl)->ofl_globcnt) /* standard globals */ 615 616 /* 617 * Define a move descriptor used within relocation structures. 618 */ 619 typedef struct { 620 Move *mr_move; 621 Sym_desc *mr_sym; 622 } Mv_reloc; 623 624 /* 625 * Relocation (active & output) processing structure - transparent to common 626 * code. There can be millions of these structures in a large link, so it 627 * is important to keep it small. You should only add new items to Rel_desc 628 * if they are critical, apply to most relocations, and cannot be easily 629 * computed from the other information. 630 * 631 * Items that can be derived should be implemented as a function that accepts 632 * a Rel_desc argument, and returns the desired data. ld_reloc_sym_name() is 633 * an example of this. 634 * 635 * Lesser used relocation data is kept in an auxiliary block, Rel_aux, 636 * that is only allocated as necessary. In exchange for adding one pointer 637 * of overhead to Rel_desc (rel_aux), most relocations are reduced in size 638 * by the size of Rel_aux. This strategy relies on the data in Rel_aux 639 * being rarely needed --- otherwise it will backfire badly. 640 * 641 * Note that rel_raddend is primarily only of interest to RELA relocations, 642 * and is set to 0 for REL. However, there is an exception: If FLG_REL_NADDEND 643 * is set, then rel_raddend contains a replacement value for the implicit 644 * addend found in the relocation target. 645 * 646 * Fields should be ordered from largest to smallest, to minimize packing 647 * holes in the struct layout. 648 */ 649 struct rel_desc { 650 Is_desc *rel_isdesc; /* input section reloc is against */ 651 Sym_desc *rel_sym; /* sym relocation is against */ 652 Rel_aux *rel_aux; /* NULL, or auxiliary data */ 653 Xword rel_roffset; /* relocation offset */ 654 Sxword rel_raddend; /* addend from input relocation */ 655 Word rel_flags; /* misc. flags for relocations */ 656 Word rel_rtype; /* relocation type */ 657 }; 658 659 /* 660 * Data that would be kept in Rel_desc if the size of that structure was 661 * not an issue. This auxiliary block is only allocated as needed, 662 * and must only contain rarely needed items. The goal is for the vast 663 * majority of Rel_desc structs to not have an auxiliary block. 664 * 665 * When a Rel_desc does not have an auxiliary block, a default value 666 * is assumed for each auxiliary item: 667 * 668 * - ra_osdesc: 669 * Output section to which relocation applies. The default 670 * value for this is the output section associated with the 671 * input section (rel_isdesc->is_osdesc), or NULL if there 672 * is no associated input section. 673 * 674 * - ra_usym: 675 * If the symbol associated with a relocation is part of a weak/strong 676 * pair, then ra_usym contains the strong symbol and rel_sym the weak. 677 * Otherwise, the default value is the same value as rel_sym. 678 * 679 * - ra_move: 680 * Move table data. The default value is NULL. 681 * 682 * - ra_typedata: 683 * ELF_R_TYPE_DATA(info). This value applies only to a small 684 * subset of 64-bit sparc relocations, and is otherwise 0. The 685 * default value is 0. 686 * 687 * If any value in Rel_aux is non-default, then an auxiliary block is 688 * necessary, and each field contains its actual value. If all the auxiliary 689 * values are default, no Rel_aux is needed, and the RELAUX_GET_xxx() 690 * macros below are able to supply the proper default. 691 * 692 * To set a Rel_aux value, use the ld_reloc_set_aux_XXX() functions. 693 * These functions are written to avoid unnecessary auxiliary allocations, 694 * and know the rules for each item. 695 */ 696 struct rel_aux { 697 Os_desc *ra_osdesc; /* output section reloc is against */ 698 Sym_desc *ra_usym; /* strong sym if this is a weak pair */ 699 Mv_reloc *ra_move; /* move table information */ 700 Word ra_typedata; /* ELF_R_TYPE_DATA(info) */ 701 }; 702 703 /* 704 * Test a given auxiliary value to determine if it has the default value 705 * for that item, as described above. If all the auxiliary items have 706 * their default values, no auxiliary place is necessary to represent them. 707 * If any one of them is non-default, the auxiliary block is needed. 708 */ 709 #define RELAUX_ISDEFAULT_MOVE(_rdesc, _mv) (_mv == NULL) 710 #define RELAUX_ISDEFAULT_USYM(_rdesc, _usym) ((_rdesc)->rel_sym == _usym) 711 #define RELAUX_ISDEFAULT_OSDESC(_rdesc, _osdesc) \ 712 ((((_rdesc)->rel_isdesc == NULL) && (_osdesc == NULL)) || \ 713 ((_rdesc)->rel_isdesc && ((_rdesc)->rel_isdesc->is_osdesc == _osdesc))) 714 #define RELAUX_ISDEFAULT_TYPEDATA(_rdesc, _typedata) (_typedata == 0) 715 716 /* 717 * Retrieve the value of an auxiliary relocation item, preserving the illusion 718 * that every relocation descriptor has an auxiliary block attached. The 719 * real implementation is that an auxiliary block is only present if one or 720 * more auxiliary items have non-default values. These macros return the true 721 * value if an auxiliary block is present, and the default value for the 722 * item otherwise. 723 */ 724 #define RELAUX_GET_MOVE(_rdesc) \ 725 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_move : NULL) 726 #define RELAUX_GET_USYM(_rdesc) \ 727 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_usym : (_rdesc)->rel_sym) 728 #define RELAUX_GET_OSDESC(_rdesc) \ 729 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_osdesc : \ 730 ((_rdesc)->rel_isdesc ? (_rdesc)->rel_isdesc->is_osdesc : NULL)) 731 #define RELAUX_GET_TYPEDATA(_rdesc) \ 732 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_typedata : 0) 733 734 /* 735 * common flags used on the Rel_desc structure (defined in machrel.h). 736 */ 737 #define FLG_REL_GOT 0x00000001 /* relocation against GOT */ 738 #define FLG_REL_PLT 0x00000002 /* relocation against PLT */ 739 #define FLG_REL_BSS 0x00000004 /* relocation against BSS */ 740 #define FLG_REL_LOAD 0x00000008 /* section loadable */ 741 #define FLG_REL_SCNNDX 0x00000010 /* use section index for symbol ndx */ 742 #define FLG_REL_CLVAL 0x00000020 /* clear VALUE for active relocation */ 743 #define FLG_REL_ADVAL 0x00000040 /* add VALUE for output relocation, */ 744 /* only relevant to SPARC and */ 745 /* R_SPARC_RELATIVE */ 746 #define FLG_REL_GOTCL 0x00000080 /* clear the GOT entry. This is */ 747 /* relevant to RELA relocations, */ 748 /* not REL (i386) relocations */ 749 #define FLG_REL_MOVETAB 0x00000100 /* Relocation against .SUNW_move */ 750 /* adjustments required before */ 751 /* actual relocation */ 752 #define FLG_REL_NOINFO 0x00000200 /* Relocation comes from a section */ 753 /* with a null sh_info field */ 754 #define FLG_REL_REG 0x00000400 /* Relocation target is reg sym */ 755 #define FLG_REL_FPTR 0x00000800 /* relocation against func. desc. */ 756 #define FLG_REL_RFPTR1 0x00001000 /* Relative relocation against */ 757 /* 1st part of FD */ 758 #define FLG_REL_RFPTR2 0x00002000 /* Relative relocation against */ 759 /* 2nd part of FD */ 760 #define FLG_REL_DISP 0x00004000 /* *disp* relocation */ 761 #define FLG_REL_STLS 0x00008000 /* IE TLS reference to */ 762 /* static TLS GOT index */ 763 #define FLG_REL_DTLS 0x00010000 /* GD TLS reference relative to */ 764 /* dynamic TLS GOT index */ 765 #define FLG_REL_MTLS 0x00020000 /* LD TLS reference against GOT */ 766 #define FLG_REL_STTLS 0x00040000 /* LE TLS reference directly */ 767 /* to static tls index */ 768 #define FLG_REL_TLSFIX 0x00080000 /* relocation points to TLS instr. */ 769 /* which needs updating */ 770 #define FLG_REL_RELA 0x00100000 /* descriptor captures a Rela */ 771 #define FLG_REL_GOTFIX 0x00200000 /* relocation points to GOTOP instr. */ 772 /* which needs updating */ 773 #define FLG_REL_NADDEND 0x00400000 /* Replace implicit addend in dest */ 774 /* with value in rel_raddend */ 775 /* Relevant to REL (i386) */ 776 /* relocations, not to RELA. */ 777 778 /* 779 * We often need the name of the symbol contained in a relocation descriptor 780 * for diagnostic or error output. This is usually the symbol name, but 781 * we substitute a constructed name in some cases. Hence, the name is 782 * generated on the fly by a private function within libld. This is the 783 * prototype for that function. 784 */ 785 typedef const char *(* rel_desc_sname_func_t)(Rel_desc *); 786 787 /* 788 * Header for a relocation descriptor cache buffer. 789 */ 790 struct rel_cachebuf { 791 Rel_desc *rc_end; 792 Rel_desc *rc_free; 793 Rel_desc rc_arr[1]; 794 }; 795 796 /* 797 * Header for a relocation auxiliary descriptor cache buffer. 798 */ 799 struct rel_aux_cachebuf { 800 Rel_aux *rac_end; 801 Rel_aux *rac_free; 802 Rel_aux rac_arr[1]; 803 }; 804 805 /* 806 * Convenience macro for traversing every relocation descriptor found within 807 * a given relocation cache, transparently handling the cache buffers and 808 * skipping any unallocated descriptors within the buffers. 809 * 810 * entry: 811 * _rel_cache - Relocate descriptor cache (Rel_cache) to traverse 812 * _idx - Aliste index variable for use by the macro 813 * _rcbp - Cache buffer pointer, for use by the macro 814 * _orsp - Rel_desc pointer, which will take on the value of a different 815 * relocation descriptor in the cache in each iteration. 816 * 817 * The caller must not assign new values to _idx, _rcbp, or _orsp within 818 * the scope of REL_CACHE_TRAVERSE. 819 */ 820 #define REL_CACHE_TRAVERSE(_rel_cache, _idx, _rcbp, _orsp) \ 821 for (APLIST_TRAVERSE((_rel_cache)->rc_list, _idx, _rcbp)) \ 822 for (_orsp = _rcbp->rc_arr; _orsp < _rcbp->rc_free; _orsp++) 823 824 /* 825 * Symbol value descriptor. For relocatable objects, each symbols value is 826 * its offset within its associated section. Therefore, to uniquely define 827 * each symbol within a relocatable object, record and sort the sh_offset and 828 * symbol value. This information is used to search for displacement 829 * relocations as part of copy relocation validation. 830 */ 831 typedef struct { 832 Addr ssv_value; 833 Sym_desc *ssv_sdp; 834 } Ssv_desc; 835 836 /* 837 * Input file processing structures. 838 */ 839 struct ifl_desc { /* input file descriptor */ 840 const char *ifl_name; /* full file name */ 841 const char *ifl_soname; /* shared object name */ 842 dev_t ifl_stdev; /* device id and inode number for .so */ 843 ino_t ifl_stino; /* multiple inclusion checks */ 844 Ehdr *ifl_ehdr; /* elf header describing this file */ 845 Elf *ifl_elf; /* elf descriptor for this file */ 846 Sym_desc **ifl_oldndx; /* original symbol table indices */ 847 Sym_desc *ifl_locs; /* symbol desc version of locals */ 848 Ssv_desc *ifl_sortsyms; /* sorted list of symbols by value */ 849 Word ifl_locscnt; /* no. of local symbols to process */ 850 Word ifl_symscnt; /* total no. of symbols to process */ 851 Word ifl_sortcnt; /* no. of sorted symbols to process */ 852 Word ifl_shnum; /* number of sections in file */ 853 Word ifl_shstrndx; /* index to .shstrtab */ 854 Word ifl_vercnt; /* number of versions in file */ 855 Half ifl_neededndx; /* index to NEEDED in .dyn section */ 856 Word ifl_flags; /* explicit/implicit reference */ 857 Is_desc **ifl_isdesc; /* isdesc[scn ndx] = Is_desc ptr */ 858 Sdf_desc *ifl_sdfdesc; /* control definition */ 859 Versym *ifl_versym; /* version symbol table array */ 860 Ver_index *ifl_verndx; /* verndx[ver ndx] = Ver_index */ 861 APlist *ifl_verdesc; /* version descriptor list */ 862 APlist *ifl_relsect; /* relocation section list */ 863 Alist *ifl_groups; /* SHT_GROUP section list */ 864 Cap_desc *ifl_caps; /* capabilities descriptor */ 865 }; 866 867 #define FLG_IF_CMDLINE 0x00000001 /* full filename specified from the */ 868 /* command line (no -l) */ 869 #define FLG_IF_NEEDED 0x00000002 /* shared object should be recorded */ 870 #define FLG_IF_DIRECT 0x00000004 /* establish direct bindings to this */ 871 /* object */ 872 #define FLG_IF_EXTRACT 0x00000008 /* file extracted from an archive */ 873 #define FLG_IF_VERNEED 0x00000010 /* version dependency information is */ 874 /* required */ 875 #define FLG_IF_DEPREQD 0x00000020 /* dependency is required to satisfy */ 876 /* symbol references */ 877 #define FLG_IF_NEEDSTR 0x00000040 /* dependency specified by -Nn */ 878 /* flag */ 879 #define FLG_IF_IGNORE 0x00000080 /* ignore unused dependencies */ 880 #define FLG_IF_NODIRECT 0x00000100 /* object contains symbols that */ 881 /* cannot be directly bound to */ 882 #define FLG_IF_LAZYLD 0x00000200 /* dependency should be lazy loaded */ 883 #define FLG_IF_GRPPRM 0x00000400 /* dependency establishes a group */ 884 #define FLG_IF_DISPPEND 0x00000800 /* displacement relocation done */ 885 /* in the ld time. */ 886 #define FLG_IF_DISPDONE 0x00001000 /* displacement relocation done */ 887 /* at the run time */ 888 #define FLG_IF_MAPFILE 0x00002000 /* file is a mapfile */ 889 #define FLG_IF_HSTRTAB 0x00004000 /* file has a string section */ 890 #define FLG_IF_FILEREF 0x00008000 /* file contains a section which */ 891 /* is included in the output */ 892 /* allocatable image */ 893 #define FLG_IF_GNUVER 0x00010000 /* file used GNU-style versioning */ 894 #define FLG_IF_ORDERED 0x00020000 /* ordered section processing */ 895 /* required */ 896 #define FLG_IF_OTOSCAP 0x00040000 /* convert object capabilities to */ 897 /* symbol capabilities */ 898 #define FLG_IF_DEFERRED 0x00080000 /* dependency is deferred */ 899 #define FLG_IF_RTLDINF 0x00100000 /* dependency has DT_SUNW_RTLTINF set */ 900 #define FLG_IF_GROUPS 0x00200000 /* input file has groups to process */ 901 902 /* 903 * Symbol states that require the generation of a DT_POSFLAG_1 .dynamic entry. 904 */ 905 #define MSK_IF_POSFLAG1 (FLG_IF_LAZYLD | FLG_IF_GRPPRM | FLG_IF_DEFERRED) 906 907 /* 908 * Symbol states that require an associated Syminfo entry. 909 */ 910 #define MSK_IF_SYMINFO (FLG_IF_LAZYLD | FLG_IF_DIRECT | FLG_IF_DEFERRED) 911 912 913 struct is_desc { /* input section descriptor */ 914 const char *is_name; /* original section name */ 915 const char *is_sym_name; /* NULL, or name string to use for */ 916 /* related STT_SECTION symbols */ 917 Shdr *is_shdr; /* the elf section header */ 918 Ifl_desc *is_file; /* infile desc for this section */ 919 Os_desc *is_osdesc; /* new output section for this */ 920 /* input section */ 921 Elf_Data *is_indata; /* input sections raw data */ 922 Is_desc *is_symshndx; /* related SHT_SYM_SHNDX section */ 923 Is_desc *is_comdatkeep; /* If COMDAT section is discarded, */ 924 /* this is section that was kept */ 925 Word is_scnndx; /* original section index in file */ 926 Word is_ordndx; /* index for section. Used to decide */ 927 /* where to insert section when */ 928 /* reordering sections */ 929 Word is_keyident; /* key for SHF_{ORDERED|LINK_ORDER} */ 930 /* processing and ident used for */ 931 /* placing/ordering sections */ 932 Word is_flags; /* Various flags */ 933 }; 934 935 #define FLG_IS_ORDERED 0x0001 /* this is a SHF_ORDERED section */ 936 #define FLG_IS_KEY 0x0002 /* section requires sort keys */ 937 #define FLG_IS_DISCARD 0x0004 /* section is to be discarded */ 938 #define FLG_IS_RELUPD 0x0008 /* symbol defined here may have moved */ 939 #define FLG_IS_SECTREF 0x0010 /* section has been referenced */ 940 #define FLG_IS_GDATADEF 0x0020 /* section contains global data sym */ 941 #define FLG_IS_EXTERNAL 0x0040 /* isp from a user file */ 942 #define FLG_IS_INSTRMRG 0x0080 /* Usable SHF_MERGE|SHF_STRINGS sec */ 943 #define FLG_IS_GNSTRMRG 0x0100 /* Generated mergeable string section */ 944 945 #define FLG_IS_PLACE 0x0400 /* section requires to be placed */ 946 #define FLG_IS_COMDAT 0x0800 /* section is COMDAT */ 947 #define FLG_IS_EHFRAME 0x1000 /* section is .eh_frame */ 948 949 /* 950 * Output sections contain lists of input sections that are assigned to them. 951 * These items fall into 4 categories: 952 * BEFORE - Ordered sections that specify SHN_BEFORE, in input order. 953 * ORDERED - Ordered sections that are sorted using unsorted sections 954 * as the sort key. 955 * DEFAULT - Sections that are placed into the output section 956 * in input order. 957 * AFTER - Ordered sections that specify SHN_AFTER, in input order. 958 */ 959 #define OS_ISD_BEFORE 0 960 #define OS_ISD_ORDERED 1 961 #define OS_ISD_DEFAULT 2 962 #define OS_ISD_AFTER 3 963 #define OS_ISD_NUM 4 964 typedef APlist *os_isdecs_arr[OS_ISD_NUM]; 965 966 /* 967 * Convenience macro for traversing every input section associated 968 * with a given output section. The primary benefit of this macro 969 * is that it preserves a precious level of code indentation in the 970 * code that uses it. 971 */ 972 #define OS_ISDESCS_TRAVERSE(_list_idx, _osp, _idx, _isp) \ 973 for (_list_idx = 0; _list_idx < OS_ISD_NUM; _list_idx++) \ 974 for (APLIST_TRAVERSE(_osp->os_isdescs[_list_idx], _idx, _isp)) 975 976 977 /* 978 * Map file and output file processing structures 979 */ 980 struct os_desc { /* Output section descriptor */ 981 const char *os_name; /* the section name */ 982 Elf_Scn *os_scn; /* the elf section descriptor */ 983 Shdr *os_shdr; /* the elf section header */ 984 Os_desc *os_relosdesc; /* the output relocation section */ 985 APlist *os_relisdescs; /* reloc input section descriptors */ 986 /* for this output section */ 987 os_isdecs_arr os_isdescs; /* lists of input sections in output */ 988 APlist *os_mstrisdescs; /* FLG_IS_INSTRMRG input sections */ 989 Sg_desc *os_sgdesc; /* segment os_desc is placed on */ 990 Elf_Data *os_outdata; /* output sections raw data */ 991 avl_tree_t *os_comdats; /* AVL tree of COMDAT input sections */ 992 /* associated to output section */ 993 Word os_identndx; /* section identifier for input */ 994 /* section processing, followed */ 995 /* by section symbol index */ 996 Word os_ordndx; /* index for section. Used to decide */ 997 /* where to insert section when */ 998 /* reordering sections */ 999 Xword os_szoutrels; /* size of output relocation section */ 1000 uint_t os_namehash; /* hash on section name */ 1001 uchar_t os_flags; /* various flags */ 1002 APlist *os_mstrsyms; /* symbols affected by string merge */ 1003 APlist *os_mstrrels; /* section relocs affected by... */ 1004 Str_tbl *os_mstrtab; /* merged string table */ 1005 }; 1006 1007 #define FLG_OS_KEY 0x01 /* section requires sort keys */ 1008 #define FLG_OS_OUTREL 0x02 /* output rel against this section */ 1009 #define FLG_OS_SECTREF 0x04 /* isps are not affected by -zignore */ 1010 #define FLG_OS_EHFRAME 0x08 /* section is .eh_frame */ 1011 1012 /* 1013 * The sg_id field of the segment descriptor is used to establish the default 1014 * order for program headers and segments in the output object. Segments are 1015 * ordered according to the following SGID values that classify them based on 1016 * their attributes. The initial set of built in segments are in this order, 1017 * and new mapfile defined segments are inserted into these groups. Within a 1018 * given SGID group, the position of new segments depends on the syntax 1019 * version of the mapfile that creates them. Version 1 (original sysv) 1020 * mapfiles place the new segment at the head of their group (reverse creation 1021 * order). The newer syntax places them at the end, following the others 1022 * (creation order). 1023 * 1024 * Note that any new segments must always be added after PT_PHDR and 1025 * PT_INTERP (refer Generic ABI, Page 5-4). 1026 */ 1027 #define SGID_PHDR 0 /* PT_PHDR */ 1028 #define SGID_INTERP 1 /* PT_INTERP */ 1029 #define SGID_SUNWCAP 2 /* PT_SUNWCAP */ 1030 #define SGID_TEXT 3 /* PT_LOAD */ 1031 #define SGID_DATA 4 /* PT_LOAD */ 1032 #define SGID_BSS 5 /* PT_LOAD */ 1033 #if defined(_ELF64) 1034 #define SGID_LRODATA 6 /* PT_LOAD (amd64-only) */ 1035 #define SGID_LDATA 7 /* PT_LOAD (amd64-only) */ 1036 #endif 1037 #define SGID_TEXT_EMPTY 8 /* PT_LOAD, reserved (?E in version 1 syntax) */ 1038 #define SGID_NULL_EMPTY 9 /* PT_NULL, reserved (?E in version 1 syntax) */ 1039 #define SGID_DYN 10 /* PT_DYNAMIC */ 1040 #define SGID_DTRACE 11 /* PT_SUNWDTRACE */ 1041 #define SGID_TLS 12 /* PT_TLS */ 1042 #define SGID_UNWIND 13 /* PT_SUNW_UNWIND */ 1043 #define SGID_SUNWSTACK 14 /* PT_SUNWSTACK */ 1044 #define SGID_NOTE 15 /* PT_NOTE */ 1045 #define SGID_NULL 16 /* PT_NULL, mapfile defined empty phdr slots */ 1046 /* for use by post processors */ 1047 #define SGID_EXTRA 17 /* PT_NULL (final catchall) */ 1048 1049 typedef Half sg_flags_t; 1050 struct sg_desc { /* output segment descriptor */ 1051 Word sg_id; /* segment identifier (for sorting) */ 1052 Phdr sg_phdr; /* segment header for output file */ 1053 const char *sg_name; /* segment name for PT_LOAD, PT_NOTE, */ 1054 /* and PT_NULL, otherwise NULL */ 1055 Xword sg_round; /* data rounding required (mapfile) */ 1056 Xword sg_length; /* maximum segment length; if 0 */ 1057 /* segment is not specified */ 1058 APlist *sg_osdescs; /* list of output section descriptors */ 1059 APlist *sg_is_order; /* list of entry criteria */ 1060 /* giving input section order */ 1061 Alist *sg_os_order; /* list specifying output section */ 1062 /* ordering for the segment */ 1063 sg_flags_t sg_flags; 1064 APlist *sg_sizesym; /* size symbols for this segment */ 1065 Xword sg_align; /* LCM of sh_addralign */ 1066 Elf_Scn *sg_fscn; /* the SCN of the first section. */ 1067 avl_node_t sg_avlnode; /* AVL book-keeping */ 1068 }; 1069 1070 #define FLG_SG_P_VADDR 0x0001 /* p_vaddr segment attribute set */ 1071 #define FLG_SG_P_PADDR 0x0002 /* p_paddr segment attribute set */ 1072 #define FLG_SG_LENGTH 0x0004 /* length segment attribute set */ 1073 #define FLG_SG_P_ALIGN 0x0008 /* p_align segment attribute set */ 1074 #define FLG_SG_ROUND 0x0010 /* round segment attribute set */ 1075 #define FLG_SG_P_FLAGS 0x0020 /* p_flags segment attribute set */ 1076 #define FLG_SG_P_TYPE 0x0040 /* p_type segment attribute set */ 1077 #define FLG_SG_IS_ORDER 0x0080 /* input section ordering is required */ 1078 /* for this segment. */ 1079 #define FLG_SG_NOHDR 0x0100 /* don't map ELF or phdrs into */ 1080 /* this segment */ 1081 #define FLG_SG_EMPTY 0x0200 /* an empty segment specification */ 1082 /* no input sections will be */ 1083 /* associated to this section */ 1084 #define FLG_SG_KEY 0x0400 /* segment requires sort keys */ 1085 #define FLG_SG_NODISABLE 0x0800 /* FLG_SG_DISABLED is not allowed on */ 1086 /* this segment */ 1087 #define FLG_SG_DISABLED 0x1000 /* this segment is disabled */ 1088 #define FLG_SG_PHREQ 0x2000 /* this segment requires a program */ 1089 /* header */ 1090 #define FLG_SG_ORDERED 0x4000 /* SEGMENT_ORDER segment */ 1091 1092 struct sec_order { 1093 const char *sco_secname; /* section name to be ordered */ 1094 Half sco_flags; 1095 }; 1096 1097 #define FLG_SGO_USED 0x0001 /* was ordering used? */ 1098 1099 typedef Half ec_flags_t; 1100 struct ent_desc { /* input section entrance criteria */ 1101 const char *ec_name; /* entrace criteria name, or NULL */ 1102 Alist *ec_files; /* files from which to accept */ 1103 /* sections */ 1104 const char *ec_is_name; /* input section name to match */ 1105 /* (NULL if none) */ 1106 Word ec_type; /* section type */ 1107 Word ec_attrmask; /* section attribute mask (AWX) */ 1108 Word ec_attrbits; /* sections attribute bits */ 1109 Sg_desc *ec_segment; /* output segment to enter if matched */ 1110 Word ec_ordndx; /* index to determine where section */ 1111 /* meeting this criteria should */ 1112 /* inserted. Used for reordering */ 1113 /* of sections. */ 1114 ec_flags_t ec_flags; 1115 avl_node_t ec_avlnode; /* AVL book-keeping */ 1116 }; 1117 1118 #define FLG_EC_BUILTIN 0x0001 /* built in descriptor */ 1119 #define FLG_EC_USED 0x0002 /* entrance criteria met? */ 1120 #define FLG_EC_CATCHALL 0x0004 /* Catches any section */ 1121 1122 /* 1123 * Ent_desc_file is the type of element maintained in the ec_files Alist 1124 * of an entrance criteria descriptor. Each item maintains one file 1125 * path, and a set of flags that specify the type of comparison it implies, 1126 * and other information about it. The comparison type is maintained in 1127 * the bottom byte of the flags. 1128 */ 1129 #define TYP_ECF_MASK 0x00ff /* Comparison type mask */ 1130 #define TYP_ECF_PATH 0 /* Compare to file path */ 1131 #define TYP_ECF_BASENAME 1 /* Compare to file basename */ 1132 #define TYP_ECF_OBJNAME 2 /* Compare to regular file basename, */ 1133 /* or to archive member name */ 1134 #define TYP_ECF_NUM 3 1135 1136 #define FLG_ECF_ARMEMBER 0x0100 /* name includes archive member */ 1137 1138 typedef struct { 1139 Word edf_flags; /* Type of comparison */ 1140 const char *edf_name; /* String to compare to */ 1141 size_t edf_name_len; /* strlen(edf_name) */ 1142 } Ent_desc_file; 1143 1144 /* 1145 * One structure is allocated for a move entry, and associated to the symbol 1146 * against which a move is targeted. 1147 */ 1148 typedef struct { 1149 Move *md_move; /* original Move entry */ 1150 Xword md_start; /* start position */ 1151 Xword md_len; /* length of initialization */ 1152 Word md_oidx; /* output Move entry index */ 1153 } Mv_desc; 1154 1155 #define SYM_ASSERT_SIZE 0x01 1156 #define SYM_ASSERT_BIND 0x02 1157 #define SYM_ASSERT_TYPE 0x04 1158 #define SYM_ASSERT_BITS 0x08 1159 #define SYM_ASSERT_ALIAS 0x10 1160 1161 typedef struct { 1162 Sym_desc *ass_sdp; 1163 char *ass_file; 1164 Lineno ass_lineno; 1165 uchar_t ass_type; 1166 uchar_t ass_bind; 1167 Lword ass_size; 1168 Boolean ass_bits; 1169 const char *ass_alias; 1170 /* Assertions explicitly enabled by user */ 1171 uint_t ass_enabled; 1172 } Ass_desc; 1173 1174 /* 1175 * Symbol descriptor. 1176 */ 1177 typedef Lword sd_flag_t; 1178 struct sym_desc { 1179 Alist *sd_GOTndxs; /* list of associated GOT entries */ 1180 Sym *sd_sym; /* pointer to symbol table entry */ 1181 Sym *sd_osym; /* copy of the original symbol entry */ 1182 /* used only for local partial */ 1183 Alist *sd_move; /* move information associated with a */ 1184 /* partially initialized symbol */ 1185 const char *sd_name; /* symbols name */ 1186 Ifl_desc *sd_file; /* file where symbol is taken */ 1187 Is_desc *sd_isc; /* input section of symbol definition */ 1188 Sym_aux *sd_aux; /* auxiliary global symbol info. */ 1189 Word sd_symndx; /* index in output symbol table */ 1190 Word sd_shndx; /* sect. index sym is associated w/ */ 1191 sd_flag_t sd_flags; /* state flags */ 1192 Half sd_ref; /* reference definition of symbol */ 1193 Ass_desc *sd_ass; /* pointer back to symbol assertions */ 1194 }; 1195 1196 /* 1197 * The auxiliary symbol descriptor contains the additional information (beyond 1198 * the symbol descriptor) required to process global symbols. These symbols are 1199 * accessed via an internal symbol hash table where locality of reference is 1200 * important for performance. 1201 */ 1202 struct sym_aux { 1203 APlist *sa_dfiles; /* files where symbol is defined */ 1204 Sym sa_sym; /* copy of symtab entry */ 1205 const char *sa_vfile; /* first unavailable definition */ 1206 const char *sa_rfile; /* file with first symbol referenced */ 1207 Word sa_hash; /* the pure hash value of symbol */ 1208 Word sa_PLTndx; /* index into PLT for symbol */ 1209 Word sa_PLTGOTndx; /* GOT entry indx for PLT indirection */ 1210 Word sa_linkndx; /* index of associated symbol from */ 1211 /* ET_DYN file */ 1212 Half sa_symspec; /* special symbol ids */ 1213 Half sa_overndx; /* output file versioning index */ 1214 Half sa_dverndx; /* dependency versioning index */ 1215 Os_desc *sa_boundsec; /* output section of SECBOUND_ syms */ 1216 }; 1217 1218 /* 1219 * Nodes used to track symbols in the global AVL symbol dictionary. 1220 */ 1221 struct sym_avlnode { 1222 avl_node_t sav_node; /* AVL node */ 1223 Word sav_hash; /* symbol hash value */ 1224 const char *sav_name; /* symbol name */ 1225 Sym_desc *sav_sdp; /* symbol descriptor */ 1226 }; 1227 1228 /* 1229 * These are the ids for processing of `Special symbols'. They are used 1230 * to set the sym->sd_aux->sa_symspec field. 1231 */ 1232 #define SDAUX_ID_ETEXT 1 /* etext && _etext symbol */ 1233 #define SDAUX_ID_EDATA 2 /* edata && _edata symbol */ 1234 #define SDAUX_ID_END 3 /* end, _end, && _END_ symbol */ 1235 #define SDAUX_ID_DYN 4 /* DYNAMIC && _DYNAMIC symbol */ 1236 #define SDAUX_ID_PLT 5 /* _PROCEDURE_LINKAGE_TABLE_ symbol */ 1237 #define SDAUX_ID_GOT 6 /* _GLOBAL_OFFSET_TABLE_ symbol */ 1238 #define SDAUX_ID_START 7 /* START_ && _START_ symbol */ 1239 #define SDAUX_ID_SECBOUND_START 8 /* __start_<section> symbols */ 1240 #define SDAUX_ID_SECBOUND_STOP 9 /* __stop_<section> symbols */ 1241 1242 /* 1243 * Flags for sym_desc.sd_flags 1244 */ 1245 #define FLG_SY_MVTOCOMM 0x00000001 /* assign symbol to common (.bss) */ 1246 /* this is a result of a */ 1247 /* copy reloc against sym */ 1248 #define FLG_SY_GLOBREF 0x00000002 /* a global reference has been seen */ 1249 #define FLG_SY_WEAKDEF 0x00000004 /* a weak definition has been used */ 1250 #define FLG_SY_CLEAN 0x00000008 /* `Sym' entry points to original */ 1251 /* input file (read-only). */ 1252 #define FLG_SY_UPREQD 0x00000010 /* symbol value update is required, */ 1253 /* either it's used as an entry */ 1254 /* point or for relocation, but */ 1255 /* it must be updated even if */ 1256 /* the -s flag is in effect */ 1257 #define FLG_SY_NOTAVAIL 0x00000020 /* symbol is not available to the */ 1258 /* application either because it */ 1259 /* originates from an implicitly */ 1260 /* referenced shared object, or */ 1261 /* because it is not part of a */ 1262 /* specified version. */ 1263 #define FLG_SY_REDUCED 0x00000040 /* a global is reduced to local */ 1264 #define FLG_SY_VERSPROM 0x00000080 /* version definition has been */ 1265 /* promoted to output file */ 1266 #define FLG_SY_PROT 0x00000100 /* stv_protected visibility seen */ 1267 #define FLG_SY_MAPREF 0x00000200 /* symbol reference generated by user */ 1268 /* from mapfile */ 1269 #define FLG_SY_REFRSD 0x00000400 /* symbols sd_ref has been raised */ 1270 /* due to a copy-relocs */ 1271 /* weak-strong pairing */ 1272 #define FLG_SY_INTPOSE 0x00000800 /* symbol defines an interposer */ 1273 #define FLG_SY_INVALID 0x00001000 /* unwanted/erroneous symbol */ 1274 #define FLG_SY_SMGOT 0x00002000 /* small got index assigned to symbol */ 1275 /* sparc only */ 1276 #define FLG_SY_PARENT 0x00004000 /* symbol to be found in parent */ 1277 /* only used with direct bindings */ 1278 #define FLG_SY_LAZYLD 0x00008000 /* symbol to cause lazyloading of */ 1279 /* parent object */ 1280 #define FLG_SY_ISDISC 0x00010000 /* symbol is a member of a DISCARDED */ 1281 /* section (COMDAT) */ 1282 #define FLG_SY_PAREXPN 0x00020000 /* partially init. symbol to be */ 1283 /* expanded */ 1284 #define FLG_SY_PLTPAD 0x00040000 /* pltpadding has been allocated for */ 1285 /* this symbol */ 1286 #define FLG_SY_REGSYM 0x00080000 /* REGISTER symbol (sparc only) */ 1287 #define FLG_SY_SOFOUND 0x00100000 /* compared against an SO definition */ 1288 #define FLG_SY_EXTERN 0x00200000 /* symbol is external, allows -zdefs */ 1289 /* error suppression */ 1290 #define FLG_SY_MAPUSED 0x00400000 /* mapfile symbol used (occurred */ 1291 /* within a relocatable object) */ 1292 #define FLG_SY_COMMEXP 0x00800000 /* COMMON symbol which has been */ 1293 /* allocated */ 1294 #define FLG_SY_CMDREF 0x01000000 /* symbol was referenced from the */ 1295 /* command line. (ld -u <>, */ 1296 /* ld -zrtldinfo=<>, ...) */ 1297 #define FLG_SY_SPECSEC 0x02000000 /* section index is reserved value */ 1298 /* ABS, COMMON, ... */ 1299 #define FLG_SY_TENTSYM 0x04000000 /* tentative symbol */ 1300 #define FLG_SY_VISIBLE 0x08000000 /* symbols visibility determined */ 1301 #define FLG_SY_STDFLTR 0x10000000 /* symbol is a standard filter */ 1302 #define FLG_SY_AUXFLTR 0x20000000 /* symbol is an auxiliary filter */ 1303 #define FLG_SY_DYNSORT 0x40000000 /* req. in dyn[sym|tls]sort section */ 1304 #define FLG_SY_NODYNSORT 0x80000000 /* excluded from dyn[sym_tls]sort sec */ 1305 1306 #define FLG_SY_DEFAULT 0x0000100000000 /* global symbol, default */ 1307 #define FLG_SY_SINGLE 0x0000200000000 /* global symbol, singleton defined */ 1308 #define FLG_SY_PROTECT 0x0000400000000 /* global symbol, protected defined */ 1309 #define FLG_SY_EXPORT 0x0000800000000 /* global symbol, exported defined */ 1310 1311 #define MSK_SY_GLOBAL \ 1312 (FLG_SY_DEFAULT | FLG_SY_SINGLE | FLG_SY_PROTECT | FLG_SY_EXPORT) 1313 /* this mask indicates that the */ 1314 /* symbol has been explicitly */ 1315 /* defined within a mapfile */ 1316 /* definition, and is a candidate */ 1317 /* for versioning */ 1318 1319 #define FLG_SY_HIDDEN 0x0001000000000 /* global symbol, reduce to local */ 1320 #define FLG_SY_ELIM 0x0002000000000 /* global symbol, eliminate */ 1321 #define FLG_SY_IGNORE 0x0004000000000 /* global symbol, ignored */ 1322 1323 #define MSK_SY_LOCAL (FLG_SY_HIDDEN | FLG_SY_ELIM | FLG_SY_IGNORE) 1324 /* this mask allows all local state */ 1325 /* flags to be removed when the */ 1326 /* symbol is copy relocated */ 1327 1328 #define FLG_SY_EXPDEF 0x0008000000000 /* symbol visibility defined */ 1329 /* explicitly */ 1330 1331 #define MSK_SY_NOAUTO (FLG_SY_SINGLE | FLG_SY_EXPORT | FLG_SY_EXPDEF) 1332 /* this mask indicates that the */ 1333 /* symbol is not a candidate for */ 1334 /* auto-reduction/elimination */ 1335 1336 #define FLG_SY_MAPFILE 0x0010000000000 /* symbol attribute defined in a */ 1337 /* mapfile */ 1338 #define FLG_SY_DIR 0x0020000000000 /* global symbol, direct bindings */ 1339 #define FLG_SY_NDIR 0x0040000000000 /* global symbol, nondirect bindings */ 1340 #define FLG_SY_OVERLAP 0x0080000000000 /* move entry overlap detected */ 1341 #define FLG_SY_CAP 0x0100000000000 /* symbol is associated with */ 1342 /* capabilities */ 1343 #define FLG_SY_DEFERRED 0x0200000000000 /* symbol should not be bound to */ 1344 /* during BIND_NOW relocations */ 1345 1346 #define FLG_SY_MAPASSRT 0x0400000000000 /* Symbol has attribute assertions */ 1347 1348 /* 1349 * A symbol can only be truly hidden if it is not a capabilities symbol. 1350 */ 1351 #define SYM_IS_HIDDEN(_sdp) \ 1352 (((_sdp)->sd_flags & (FLG_SY_HIDDEN | FLG_SY_CAP)) == FLG_SY_HIDDEN) 1353 1354 /* 1355 * Create a mask for (sym.st_other & visibility) since the gABI does not yet 1356 * define a ELF*_ST_OTHER macro. 1357 */ 1358 #define MSK_SYM_VISIBILITY 0x7 1359 1360 /* 1361 * Structure to manage the shared object definition lists. There are two lists 1362 * that use this structure: 1363 * 1364 * - ofl_soneed; maintain the list of implicitly required dependencies 1365 * (ie. shared objects needed by other shared objects). These definitions 1366 * may include RPATH's required to locate the dependencies, and any 1367 * version requirements. 1368 * 1369 * - ofl_socntl; maintains the shared object control definitions. These are 1370 * provided by the user (via a mapfile) and are used to indicate any 1371 * version control requirements. 1372 */ 1373 struct sdf_desc { 1374 const char *sdf_name; /* the shared objects file name */ 1375 char *sdf_rpath; /* library search path DT_RPATH */ 1376 const char *sdf_rfile; /* referencing file for diagnostics */ 1377 Ifl_desc *sdf_file; /* the final input file descriptor */ 1378 Alist *sdf_vers; /* list of versions that are required */ 1379 /* from this object */ 1380 Alist *sdf_verneed; /* list of VERNEEDS to create for */ 1381 /* object via mapfile ADDVERS */ 1382 Word sdf_flags; 1383 }; 1384 1385 #define FLG_SDF_SELECT 0x01 /* version control selection required */ 1386 #define FLG_SDF_VERIFY 0x02 /* version definition verification */ 1387 /* required */ 1388 #define FLG_SDF_ADDVER 0x04 /* add VERNEED references */ 1389 1390 /* 1391 * Structure to manage shared object version usage requirements. 1392 */ 1393 struct sdv_desc { 1394 const char *sdv_name; /* version name */ 1395 const char *sdv_ref; /* versions reference */ 1396 Word sdv_flags; /* flags */ 1397 }; 1398 1399 #define FLG_SDV_MATCHED 0x01 /* VERDEF found and matched */ 1400 1401 /* 1402 * Structures to manage versioning information. Two versioning structures are 1403 * defined: 1404 * 1405 * - a version descriptor maintains a linked list of versions and their 1406 * associated dependencies. This is used to build the version definitions 1407 * for an image being created (see map_symbol), and to determine the 1408 * version dependency graph for any input files that are versioned. 1409 * 1410 * - a version index array contains each version of an input file that is 1411 * being processed. It informs us which versions are available for 1412 * binding, and is used to generate any version dependency information. 1413 */ 1414 struct ver_desc { 1415 const char *vd_name; /* version name */ 1416 Ifl_desc *vd_file; /* file that defined version */ 1417 Word vd_hash; /* hash value of name */ 1418 Half vd_ndx; /* coordinates with symbol index */ 1419 Half vd_flags; /* version information */ 1420 APlist *vd_deps; /* version dependencies */ 1421 Ver_desc *vd_ref; /* dependency's first reference */ 1422 }; 1423 1424 struct ver_index { 1425 const char *vi_name; /* dependency version name */ 1426 Half vi_flags; /* communicates availability */ 1427 Half vi_overndx; /* index assigned to this version in */ 1428 /* output object Verneed section */ 1429 Ver_desc *vi_desc; /* cross reference to descriptor */ 1430 }; 1431 1432 /* 1433 * Define any internal version descriptor flags ([vd|vi]_flags). Note that the 1434 * first byte is reserved for user visible flags (refer VER_FLG's in link.h). 1435 */ 1436 #define MSK_VER_USER 0x0f /* mask for user visible flags */ 1437 1438 #define FLG_VER_AVAIL 0x10 /* version is available for binding */ 1439 #define FLG_VER_REFER 0x20 /* version has been referenced */ 1440 #define FLG_VER_CYCLIC 0x40 /* a member of cyclic dependency */ 1441 1442 /* 1443 * isalist(1) descriptor - used to break an isalist string into its component 1444 * options. 1445 */ 1446 struct isa_opt { 1447 char *isa_name; /* individual isa option name */ 1448 size_t isa_namesz; /* and associated size */ 1449 }; 1450 1451 struct isa_desc { 1452 char *isa_list; /* sysinfo(SI_ISALIST) list */ 1453 size_t isa_listsz; /* and associated size */ 1454 Isa_opt *isa_opt; /* table of individual isa options */ 1455 size_t isa_optno; /* and associated number */ 1456 }; 1457 1458 /* 1459 * uname(2) descriptor - used to break a utsname structure into its component 1460 * options (at least those that we're interested in). 1461 */ 1462 struct uts_desc { 1463 char *uts_osname; /* operating system name */ 1464 size_t uts_osnamesz; /* and associated size */ 1465 char *uts_osrel; /* operating system release */ 1466 size_t uts_osrelsz; /* and associated size */ 1467 }; 1468 1469 /* 1470 * SHT_GROUP descriptor - used to track group sections at the global 1471 * level to resolve conflicts and determine which to keep. 1472 */ 1473 struct group_desc { 1474 Is_desc *gd_isc; /* input section descriptor */ 1475 Is_desc *gd_oisc; /* overriding input section */ 1476 /* descriptor when discarded */ 1477 const char *gd_name; /* group name (signature symbol) */ 1478 Word *gd_data; /* data for group section */ 1479 size_t gd_cnt; /* number of entries in group data */ 1480 }; 1481 1482 /* 1483 * Indexes into the ld_support_funcs[] table. 1484 */ 1485 typedef enum { 1486 LDS_VERSION = 0, /* Must be first and have value 0 */ 1487 LDS_INPUT_DONE, 1488 LDS_START, 1489 LDS_ATEXIT, 1490 LDS_OPEN, 1491 LDS_FILE, 1492 LDS_INSEC, 1493 LDS_SEC, 1494 LDS_NUM 1495 } Support_ndx; 1496 1497 /* 1498 * Structure to manage archive member caching. Each archive has an archive 1499 * descriptor (Ar_desc) associated with it. This contains pointers to the 1500 * archive symbol table (obtained by elf_getarsyms(3ELF)) and an auxiliary 1501 * structure (Ar_uax[]) that parallels this symbol table. The member element 1502 * of this auxiliary table indicates whether the archive member associated with 1503 * the symbol offset has already been extracted (AREXTRACTED) or partially 1504 * processed (refer process_member()). 1505 */ 1506 typedef struct ar_mem { 1507 Elf *am_elf; /* elf descriptor for this member */ 1508 const char *am_name; /* members name */ 1509 const char *am_path; /* path (ie. lib(foo.o)) */ 1510 Sym *am_syms; /* start of global symbols */ 1511 char *am_strs; /* associated string table start */ 1512 Xword am_symn; /* no. of global symbols */ 1513 } Ar_mem; 1514 1515 typedef struct ar_aux { 1516 Sym_desc *au_syms; /* internal symbol descriptor */ 1517 Ar_mem *au_mem; /* associated member */ 1518 } Ar_aux; 1519 1520 #define FLG_ARMEM_PROC (Ar_mem *)-1 1521 1522 typedef struct ar_desc { 1523 const char *ad_name; /* archive file name */ 1524 Elf *ad_elf; /* elf descriptor for the archive */ 1525 Elf_Arsym *ad_start; /* archive symbol table start */ 1526 Ar_aux *ad_aux; /* auxiliary symbol information */ 1527 dev_t ad_stdev; /* device id and inode number for */ 1528 ino_t ad_stino; /* multiple inclusion checks */ 1529 ofl_flag_t ad_flags; /* archive specific cmd line flags */ 1530 Boolean ad_allextract; /* archive has been allextract'ed */ 1531 } Ar_desc; 1532 1533 /* 1534 * Define any archive descriptor flags. NOTE, make sure they do not clash with 1535 * any output file descriptor archive extraction flags, as these are saved in 1536 * the same entry (see MSK_OF1_ARCHIVE). 1537 */ 1538 #define FLG_ARD_EXTRACT 0x00010000 /* archive member has been extracted */ 1539 1540 /* Mapfile versions supported by libld */ 1541 #define MFV_NONE 0 /* Not a valid version */ 1542 #define MFV_SYSV 1 /* Original System V syntax */ 1543 #define MFV_SOLARIS 2 /* Solaris mapfile syntax */ 1544 #define MFV_NUM 3 /* # of mapfile versions */ 1545 1546 1547 /* 1548 * Function Declarations. 1549 */ 1550 #if defined(_ELF64) 1551 1552 #define ld_create_outfile ld64_create_outfile 1553 #define ld_ent_setup ld64_ent_setup 1554 #define ld_init_strings ld64_init_strings 1555 #define ld_init_target ld64_init_target 1556 #define ld_make_sections ld64_make_sections 1557 #define ld_main ld64_main 1558 #define ld_ofl_cleanup ld64_ofl_cleanup 1559 #define ld_process_mem ld64_process_mem 1560 #define ld_reloc_init ld64_reloc_init 1561 #define ld_reloc_process ld64_reloc_process 1562 #define ld_sym_validate ld64_sym_validate 1563 #define ld_update_outfile ld64_update_outfile 1564 1565 #else 1566 1567 #define ld_create_outfile ld32_create_outfile 1568 #define ld_ent_setup ld32_ent_setup 1569 #define ld_init_strings ld32_init_strings 1570 #define ld_init_target ld32_init_target 1571 #define ld_make_sections ld32_make_sections 1572 #define ld_main ld32_main 1573 #define ld_ofl_cleanup ld32_ofl_cleanup 1574 #define ld_process_mem ld32_process_mem 1575 #define ld_reloc_init ld32_reloc_init 1576 #define ld_reloc_process ld32_reloc_process 1577 #define ld_sym_validate ld32_sym_validate 1578 #define ld_update_outfile ld32_update_outfile 1579 1580 #endif 1581 1582 extern int ld_getopt(Lm_list *, int, int, char **); 1583 1584 extern int ld32_main(int, char **, Half); 1585 extern int ld64_main(int, char **, Half); 1586 1587 extern uintptr_t ld_create_outfile(Ofl_desc *); 1588 extern uintptr_t ld_ent_setup(Ofl_desc *, Xword); 1589 extern uintptr_t ld_init_strings(Ofl_desc *); 1590 extern int ld_init_target(Lm_list *, Half mach); 1591 extern uintptr_t ld_make_sections(Ofl_desc *); 1592 extern void ld_ofl_cleanup(Ofl_desc *); 1593 extern Ifl_desc *ld_process_mem(const char *, const char *, char *, 1594 size_t, Ofl_desc *, Rej_desc *); 1595 extern uintptr_t ld_reloc_init(Ofl_desc *); 1596 extern uintptr_t ld_reloc_process(Ofl_desc *); 1597 extern uintptr_t ld_sym_validate(Ofl_desc *); 1598 extern uintptr_t ld_update_outfile(Ofl_desc *); 1599 1600 #ifdef __cplusplus 1601 } 1602 #endif 1603 1604 #endif /* _LIBLD_H */ 1605