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 2009 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 #ifndef _LIBLD_H 31 #define _LIBLD_H 32 33 #include <stdlib.h> 34 #include <libelf.h> 35 #include <sgs.h> 36 #include <_machelf.h> 37 #include <string_table.h> 38 #include <sys/avl.h> 39 #include <alist.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 * GOT reference models 105 */ 106 typedef enum { 107 GOT_REF_GENERIC, /* generic symbol reference */ 108 GOT_REF_TLSIE, /* TLS initial exec (gnu) reference */ 109 GOT_REF_TLSLD, /* TLS local dynamic reference */ 110 GOT_REF_TLSGD /* TLS general dynamic reference */ 111 } Gotref; 112 113 typedef struct { 114 Xword gn_addend; /* addend associated with GOT entry */ 115 Sword gn_gotndx; /* GOT table index */ 116 Gotref gn_gotref; 117 } Gotndx; 118 119 /* 120 * Got debugging structure. The got index is defined as a signed value as we 121 * do so much mucking around with negative and positive gots on SPARC, and sign 122 * extension is necessary when building 64-bit objects. On intel we explicitly 123 * cast this variable to an unsigned value. 124 */ 125 typedef struct { 126 Sym_desc *gt_sym; 127 Gotndx gt_gndx; 128 } Gottable; 129 130 /* 131 * The link-editor caches the results of sloppy relocation processing 132 * in a variable of type Rlxrel_cache. Symbols come for processing in sorted 133 * order, so a single item cache suffices to eliminate duplicate lookups. 134 * 135 * When sloppy relocation processing fails, the Rlxrel_rej enum reports 136 * the underlying reason. 137 */ 138 typedef enum { 139 RLXREL_REJ_NONE = 0, /* Replacement symbol was found */ 140 RLXREL_REJ_TARGET, /* Target sec disallows relaxed relocations */ 141 RLXREL_REJ_SECTION, /* Either there is no replacement section, */ 142 /* or its attributes are incompatible */ 143 RLXREL_REJ_SYMBOL, /* Replacement symbol not found */ 144 } Rlxrel_rej; 145 146 typedef struct sreloc_cache { 147 Sym_desc *sr_osdp; /* Original symbol */ 148 Sym_desc *sr_rsdp; /* Replacement symbol */ 149 Rlxrel_rej sr_rej; /* Reason for failure if NULL sr_rsdp */ 150 } Rlxrel_cache; 151 152 /* 153 * Nodes in an ofl_wrap AVL tree 154 * 155 * wsn_name is the name of the symbol to be wrapped. wsn_wrapname is used 156 * when we need to refer to the wrap symbol, and consists of the symbol 157 * name with a __wrap_ prefix. 158 */ 159 typedef struct wrap_sym_node { 160 avl_node_t wsn_avlnode; /* AVL book-keeping */ 161 const char *wsn_name; /* Symbol name: XXX */ 162 const char *wsn_wrapname; /* Wrap symbol name: __wrap_XXX */ 163 } WrapSymNode; 164 165 166 /* 167 * Output file processing structure 168 */ 169 typedef Lword ofl_flag_t; 170 struct ofl_desc { 171 char *ofl_sgsid; /* link-editor identification */ 172 const char *ofl_name; /* full file name */ 173 Elf *ofl_elf; /* elf_memory() elf descriptor */ 174 Elf *ofl_welf; /* ELF_C_WRITE elf descriptor */ 175 Ehdr *ofl_dehdr; /* default elf header, and new elf */ 176 Ehdr *ofl_nehdr; /* header describing this file */ 177 Phdr *ofl_phdr; /* program header descriptor */ 178 Phdr *ofl_tlsphdr; /* TLS phdr */ 179 int ofl_fd; /* file descriptor */ 180 size_t ofl_size; /* image size */ 181 APlist *ofl_maps; /* list of input mapfiles */ 182 APlist *ofl_segs; /* list of segments */ 183 Alist *ofl_ents; /* list of entrance descriptors */ 184 APlist *ofl_objs; /* relocatable object file list */ 185 Word ofl_objscnt; /* and count */ 186 APlist *ofl_ars; /* archive library list */ 187 Word ofl_arscnt; /* and count */ 188 int ofl_ars_gsandx; /* archive group argv index. 0 means */ 189 /* no current group, < 0 means */ 190 /* error reported. >0 is cur ndx */ 191 Word ofl_ars_gsndx; /* current -zrescan-start ofl_ars ndx */ 192 APlist *ofl_sos; /* shared object list */ 193 Word ofl_soscnt; /* and count */ 194 APlist *ofl_soneed; /* list of implicitly required .so's */ 195 APlist *ofl_socntl; /* list of .so control definitions */ 196 APlist *ofl_outrels; /* list of output relocations */ 197 Word ofl_outrelscnt; /* and count */ 198 APlist *ofl_actrels; /* list of relocations to perform */ 199 Word ofl_actrelscnt; /* and count */ 200 Word ofl_entrelscnt; /* no of relocations entered */ 201 Alist *ofl_copyrels; /* list of copy relocations */ 202 APlist *ofl_ordered; /* list of shf_ordered sections */ 203 APlist *ofl_symdtent; /* list of syminfo symbols that need */ 204 /* to reference .dynamic entries */ 205 APlist *ofl_ismove; /* list of .SUNW_move sections */ 206 APlist *ofl_ismoverel; /* list of relocation input section */ 207 /* targeting to expanded area */ 208 APlist *ofl_parsyms; /* list of partially initialized */ 209 /* symbols (ie. move symbols) */ 210 APlist *ofl_extrarels; /* relocation sections which have */ 211 /* a NULL sh_info */ 212 avl_tree_t *ofl_groups; /* pointer to head of Groups AVL tree */ 213 APlist *ofl_initarray; /* list of init array func names */ 214 APlist *ofl_finiarray; /* list of fini array func names */ 215 APlist *ofl_preiarray; /* list of preinit array func names */ 216 APlist *ofl_rtldinfo; /* list of rtldinfo syms */ 217 APlist *ofl_osgroups; /* list of output GROUP sections */ 218 APlist *ofl_ostlsseg; /* pointer to sections in TLS segment */ 219 APlist *ofl_unwind; /* list of unwind output sections */ 220 Os_desc *ofl_unwindhdr; /* Unwind hdr */ 221 avl_tree_t ofl_symavl; /* pointer to head of Syms AVL tree */ 222 Sym_desc **ofl_regsyms; /* array of potential register */ 223 Word ofl_regsymsno; /* symbols and array count */ 224 Word ofl_regsymcnt; /* no. of output register symbols */ 225 Word ofl_lregsymcnt; /* no. of local register symbols */ 226 Sym_desc *ofl_dtracesym; /* ld -zdtrace= */ 227 ofl_flag_t ofl_flags; /* various state bits, args etc. */ 228 ofl_flag_t ofl_flags1; /* more flags */ 229 void *ofl_entry; /* entry point (-e and Sym_desc *) */ 230 char *ofl_filtees; /* shared objects we are a filter for */ 231 const char *ofl_soname; /* (-h option) output file name for */ 232 /* dynamic structure */ 233 const char *ofl_interp; /* interpreter name used by exec() */ 234 char *ofl_rpath; /* run path to store in .dynamic */ 235 char *ofl_config; /* config path to store in .dynamic */ 236 APlist *ofl_ulibdirs; /* user supplied library search list */ 237 APlist *ofl_dlibdirs; /* default library search list */ 238 Word ofl_vercnt; /* number of versions to generate */ 239 APlist *ofl_verdesc; /* list of version descriptors */ 240 size_t ofl_verdefsz; /* size of version definition section */ 241 size_t ofl_verneedsz; /* size of version needed section */ 242 Word ofl_entercnt; /* no. of global symbols entered */ 243 Word ofl_globcnt; /* no. of global symbols to output */ 244 Word ofl_scopecnt; /* no. of scoped symbols to output */ 245 Word ofl_dynscopecnt; /* no. scoped syms in .SUNW_ldynsym */ 246 Word ofl_elimcnt; /* no. of eliminated symbols */ 247 Word ofl_locscnt; /* no. of local symbols in .symtab */ 248 Word ofl_dynlocscnt; /* no. local symbols in .SUNW_ldynsym */ 249 Word ofl_dynsymsortcnt; /* no. ndx in .SUNW_dynsymsort */ 250 Word ofl_dyntlssortcnt; /* no. ndx in .SUNW_dyntlssort */ 251 Word ofl_dynshdrcnt; /* no. of output section in .dynsym */ 252 Word ofl_shdrcnt; /* no. of output sections */ 253 Str_tbl *ofl_shdrsttab; /* Str_tbl for shdr strtab */ 254 Str_tbl *ofl_strtab; /* Str_tbl for symtab strtab */ 255 Str_tbl *ofl_dynstrtab; /* Str_tbl for dymsym strtab */ 256 Gotndx *ofl_tlsldgotndx; /* index to LD TLS_index structure */ 257 Xword ofl_relocsz; /* size of output relocations */ 258 Xword ofl_relocgotsz; /* size of .got relocations */ 259 Xword ofl_relocpltsz; /* size of .plt relocations */ 260 Xword ofl_relocbsssz; /* size of .bss (copy) relocations */ 261 Xword ofl_relocrelsz; /* size of .rel[a] relocations */ 262 Word ofl_relocincnt; /* no. of input relocations */ 263 Word ofl_reloccnt; /* tot number of output relocations */ 264 Word ofl_reloccntsub; /* tot numb of output relocations to */ 265 /* skip (-zignore) */ 266 Word ofl_relocrelcnt; /* tot number of relative */ 267 /* relocations */ 268 Word ofl_gotcnt; /* no. of .got entries */ 269 Word ofl_pltcnt; /* no. of .plt entries */ 270 Word ofl_pltpad; /* no. of .plt padd entries */ 271 Word ofl_hashbkts; /* no. of hash buckets required */ 272 Is_desc *ofl_isbss; /* .bss input section (globals) */ 273 Is_desc *ofl_islbss; /* .lbss input section (globals) */ 274 Is_desc *ofl_istlsbss; /* .tlsbss input section (globals) */ 275 Is_desc *ofl_isparexpn; /* -z nopartial .data input section */ 276 Os_desc *ofl_osdynamic; /* .dynamic output section */ 277 Os_desc *ofl_osdynsym; /* .dynsym output section */ 278 Os_desc *ofl_osldynsym; /* .SUNW_ldynsym output section */ 279 Os_desc *ofl_osdynstr; /* .dynstr output section */ 280 Os_desc *ofl_osdynsymsort; /* .SUNW_dynsymsort output section */ 281 Os_desc *ofl_osdyntlssort; /* .SUNW_dyntlssort output section */ 282 Os_desc *ofl_osgot; /* .got output section */ 283 Os_desc *ofl_oshash; /* .hash output section */ 284 Os_desc *ofl_osinitarray; /* .initarray output section */ 285 Os_desc *ofl_osfiniarray; /* .finiarray output section */ 286 Os_desc *ofl_ospreinitarray; /* .preinitarray output section */ 287 Os_desc *ofl_osinterp; /* .interp output section */ 288 Os_desc *ofl_oscap; /* .SUNW_cap output section */ 289 Os_desc *ofl_osplt; /* .plt output section */ 290 Os_desc *ofl_osmove; /* .SUNW_move output section */ 291 Os_desc *ofl_osrelhead; /* first relocation section */ 292 Os_desc *ofl_osrel; /* .rel[a] relocation section */ 293 Os_desc *ofl_osshstrtab; /* .shstrtab output section */ 294 Os_desc *ofl_osstrtab; /* .strtab output section */ 295 Os_desc *ofl_ossymtab; /* .symtab output section */ 296 Os_desc *ofl_ossymshndx; /* .symtab_shndx output section */ 297 Os_desc *ofl_osdynshndx; /* .dynsym_shndx output section */ 298 Os_desc *ofl_osldynshndx; /* .SUNW_ldynsym_shndx output sec */ 299 Os_desc *ofl_osverdef; /* .version definition output section */ 300 Os_desc *ofl_osverneed; /* .version needed output section */ 301 Os_desc *ofl_osversym; /* .version symbol ndx output section */ 302 Word ofl_dtflags_1; /* DT_FLAGS_1 entries */ 303 Word ofl_dtflags; /* DT_FLAGS entries */ 304 Os_desc *ofl_ossyminfo; /* .SUNW_syminfo output section */ 305 Half ofl_parexpnndx; /* -z nopartial section index */ 306 /* Ref. at perform_outreloc() in */ 307 /* libld/{mach}/machrel.c */ 308 Xword *ofl_checksum; /* DT_CHECKSUM value address */ 309 char *ofl_depaudit; /* dependency auditing required (-P) */ 310 char *ofl_audit; /* object auditing required (-p) */ 311 Alist *ofl_symfltrs; /* per-symbol filtees and their */ 312 Alist *ofl_dtsfltrs; /* associated .dynamic/.dynstrs */ 313 Xword ofl_hwcap_1; /* hardware capabilities */ 314 Xword ofl_sfcap_1; /* software capabilities */ 315 Lm_list *ofl_lml; /* runtime link-map list */ 316 Gottable *ofl_gottable; /* debugging got information */ 317 Rlxrel_cache ofl_sr_cache; /* Cache last result from */ 318 /* sloppy_comdat_reloc() */ 319 APlist *ofl_maptext; /* mapfile added text sections */ 320 APlist *ofl_mapdata; /* mapfile added data sections */ 321 avl_tree_t *ofl_wrap; /* -z wrap symbols */ 322 }; 323 324 #define FLG_OF_DYNAMIC 0x00000001 /* generate dynamic output module */ 325 #define FLG_OF_STATIC 0x00000002 /* generate static output module */ 326 #define FLG_OF_EXEC 0x00000004 /* generate an executable */ 327 #define FLG_OF_RELOBJ 0x00000008 /* generate a relocatable object */ 328 #define FLG_OF_SHAROBJ 0x00000010 /* generate a shared object */ 329 #define FLG_OF_BFLAG 0x00000020 /* do no special plt building: -b */ 330 #define FLG_OF_IGNENV 0x00000040 /* ignore LD_LIBRARY_PATH: -i */ 331 #define FLG_OF_STRIP 0x00000080 /* strip output: -s */ 332 #define FLG_OF_NOWARN 0x00000100 /* disable symbol warnings: -t */ 333 #define FLG_OF_NOUNDEF 0x00000200 /* allow no undefined symbols: -zdefs */ 334 #define FLG_OF_PURETXT 0x00000400 /* allow no text relocations: -ztext */ 335 #define FLG_OF_GENMAP 0x00000800 /* generate a memory map: -m */ 336 #define FLG_OF_DYNLIBS 0x00001000 /* dynamic input allowed: -Bdynamic */ 337 #define FLG_OF_SYMBOLIC 0x00002000 /* bind global symbols: -Bsymbolic */ 338 #define FLG_OF_ADDVERS 0x00004000 /* add version stamp: -Qy */ 339 #define FLG_OF_NOLDYNSYM 0x00008000 /* -znoldynsym set */ 340 #define FLG_OF_SEGORDER 0x00010000 /* segment ordering is required */ 341 #define FLG_OF_SEGSORT 0x00020000 /* segment sorting is required */ 342 #define FLG_OF_TEXTREL 0x00040000 /* text relocations have been found */ 343 #define FLG_OF_MULDEFS 0x00080000 /* multiple symbols are allowed */ 344 #define FLG_OF_TLSPHDR 0x00100000 /* a TLS program header is required */ 345 #define FLG_OF_BLDGOT 0x00200000 /* build GOT table */ 346 #define FLG_OF_VERDEF 0x00400000 /* record version definitions */ 347 #define FLG_OF_VERNEED 0x00800000 /* record version dependencies */ 348 #define FLG_OF_NOVERSEC 0x01000000 /* don't record version sections */ 349 #define FLG_OF_KEY 0x02000000 /* file requires sort keys */ 350 #define FLG_OF_PROCRED 0x04000000 /* process any symbol reductions by */ 351 /* effecting the symbol table */ 352 /* output and relocations */ 353 #define FLG_OF_SYMINFO 0x08000000 /* create a syminfo section */ 354 #define FLG_OF_AUX 0x10000000 /* ofl_filter is an auxiliary filter */ 355 #define FLG_OF_FATAL 0x20000000 /* fatal error during input */ 356 #define FLG_OF_WARN 0x40000000 /* warning during input processing. */ 357 #define FLG_OF_VERBOSE 0x80000000 /* -z verbose flag set */ 358 359 #define FLG_OF_MAPSYMB 0x000100000000 /* symbolic scope definition seen */ 360 #define FLG_OF_MAPGLOB 0x000200000000 /* global scope definition seen */ 361 #define FLG_OF_COMREL 0x000400000000 /* -z combreloc set, which enables */ 362 /* DT_RELACNT tracking, */ 363 #define FLG_OF_NOCOMREL 0x000800000000 /* -z nocombreloc set */ 364 #define FLG_OF_AUTOLCL 0x001000000000 /* automatically reduce unspecified */ 365 /* global symbols to locals */ 366 #define FLG_OF_AUTOELM 0x002000000000 /* automatically eliminate */ 367 /* unspecified global symbols */ 368 #define FLG_OF_REDLSYM 0x004000000000 /* reduce local symbols */ 369 #define FLG_OF_SECORDER 0x008000000000 /* section ordering is required */ 370 #define FLG_OF_OSABI 0x010000000000 /* tag object as ELFOSABI_SOLARIS */ 371 #define FLG_OF_ADJOSCNT 0x020000000000 /* ajust ofl_shdrcnt to accommodate */ 372 /* discarded sections */ 373 374 /* 375 * In the flags1 arena, establish any options that are applicable to archive 376 * extraction first, and associate a mask. These values are recorded with any 377 * archive descriptor so that they may be reset should the archive require a 378 * rescan to try and resolve undefined symbols. 379 */ 380 #define FLG_OF1_ALLEXRT 0x00000001 /* extract all members from an */ 381 /* archive file */ 382 #define FLG_OF1_WEAKEXT 0x00000002 /* allow archive extraction to */ 383 /* resolve weak references */ 384 #define MSK_OF1_ARCHIVE 0x00000003 /* archive flags mask */ 385 386 #define FLG_OF1_NOINTRP 0x00000008 /* -z nointerp flag set */ 387 #define FLG_OF1_ZDIRECT 0x00000010 /* -z direct flag set */ 388 #define FLG_OF1_NDIRECT 0x00000020 /* no-direct bindings specified */ 389 #define FLG_OF1_OVHWCAP 0x00000040 /* override any input hardware or */ 390 #define FLG_OF1_OVSFCAP 0x00000080 /* software capabilities */ 391 #define FLG_OF1_RELDYN 0x00000100 /* process .dynamic in rel obj */ 392 #define FLG_OF1_NRLXREL 0x00000200 /* -z norelaxreloc flag set */ 393 #define FLG_OF1_RLXREL 0x00000400 /* -z relaxreloc flag set */ 394 #define FLG_OF1_IGNORE 0x00000800 /* ignore unused dependencies */ 395 396 #define FLG_OF1_NOSGHND 0x00001000 /* -z nosighandler flag set */ 397 #define FLG_OF1_TEXTOFF 0x00002000 /* text relocations are ok */ 398 #define FLG_OF1_ABSEXEC 0x00004000 /* -zabsexec set */ 399 #define FLG_OF1_LAZYLD 0x00008000 /* lazy loading of objects enabled */ 400 #define FLG_OF1_GRPPRM 0x00010000 /* dependencies are to have */ 401 /* GROUPPERM enabled */ 402 #define FLG_OF1_OVRFLW 0x00020000 /* size exceeds 32-bit limitation */ 403 /* of 32-bit libld */ 404 #define FLG_OF1_NOPARTI 0x00040000 /* -znopartial set */ 405 #define FLG_OF1_BSSOREL 0x00080000 /* output relocation against bss */ 406 /* section */ 407 #define FLG_OF1_TLSOREL 0x00100000 /* output relocation against .tlsbss */ 408 /* section */ 409 #define FLG_OF1_MEMORY 0x00200000 /* produce a memory model */ 410 #define FLG_OF1_NGLBDIR 0x00400000 /* no DT_1_DIRECT flag allowed */ 411 #define FLG_OF1_ENCDIFF 0x00800000 /* Host running linker has different */ 412 /* byte order than output object */ 413 #define FLG_OF1_VADDR 0x01000000 /* user segment defines a vaddr */ 414 #define FLG_OF1_EXTRACT 0x02000000 /* archive member has been extracted */ 415 #define FLG_OF1_RESCAN 0x04000000 /* any archives should be rescanned */ 416 #define FLG_OF1_IGNPRC 0x08000000 /* ignore processing required */ 417 #define FLG_OF1_NCSTTAB 0x10000000 /* -znocompstrtab set */ 418 #define FLG_OF1_DONE 0x20000000 /* link-editor processing complete */ 419 #define FLG_OF1_NONREG 0x40000000 /* non-regular file specified as */ 420 /* the output file */ 421 #define FLG_OF1_ALNODIR 0x80000000 /* establish NODIRECT for all */ 422 /* exported interfaces. */ 423 424 /* 425 * Test to see if the output file would allow the presence of 426 * a .dynsym section. 427 */ 428 #define OFL_ALLOW_DYNSYM(_ofl) (((_ofl)->ofl_flags & \ 429 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == FLG_OF_DYNAMIC) 430 431 /* 432 * Test to see if the output file would allow the presence of 433 * a .SUNW_ldynsym section. The requirements are that a .dynsym 434 * is allowed, and -znoldynsym has not been specified. Note that 435 * even if the answer is True (1), we will only generate one if there 436 * are local symbols that require it. 437 */ 438 #define OFL_ALLOW_LDYNSYM(_ofl) (((_ofl)->ofl_flags & \ 439 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ | FLG_OF_NOLDYNSYM)) == FLG_OF_DYNAMIC) 440 441 /* 442 * Test to see if relocation processing should be done. This is normally 443 * true, but can be disabled via the '-z noreloc' option. Note that 444 * relocatable objects are still relocated even if '-z noreloc' is present. 445 */ 446 #define OFL_DO_RELOC(_ofl) (((_ofl)->ofl_flags & FLG_OF_RELOBJ) || \ 447 !((_ofl)->ofl_dtflags_1 & DF_1_NORELOC)) 448 449 /* 450 * Determine whether a static executable is being built. 451 */ 452 #define OFL_IS_STATIC_EXEC(_ofl) (((_ofl)->ofl_flags & \ 453 (FLG_OF_STATIC | FLG_OF_EXEC)) == (FLG_OF_STATIC | FLG_OF_EXEC)) 454 455 /* 456 * Determine whether a static object is being built. This macro is used 457 * to select the appropriate string table, and symbol table that other 458 * sections need to reference. 459 */ 460 #define OFL_IS_STATIC_OBJ(_ofl) ((_ofl)->ofl_flags & \ 461 (FLG_OF_RELOBJ | FLG_OF_STATIC)) 462 463 /* 464 * Macros for counting symbol table entries. These are used to size symbol 465 * tables and associated sections (.syminfo, SUNW_capinfo, .hash, etc.) and 466 * set required sh_info entries (the offset to the first global symbol). 467 */ 468 #define SYMTAB_LOC_CNT(_ofl) /* local .symtab entries */ \ 469 (2 + /* NULL and STT_FILE */ \ 470 (_ofl)->ofl_shdrcnt + /* section symbol */ \ 471 (_ofl)->ofl_scopecnt + /* scoped symbols */ \ 472 (_ofl)->ofl_locscnt) /* standard locals */ 473 #define SYMTAB_ALL_CNT(_ofl) /* all .symtab entries */ \ 474 (SYMTAB_LOC_CNT(_ofl) + /* .symtab locals */ \ 475 (_ofl)->ofl_globcnt) /* standard globals */ 476 477 #define DYNSYM_LOC_CNT(_ofl) /* local .dynsym entries */ \ 478 (1 + /* NULL */ \ 479 (_ofl)->ofl_dynshdrcnt + /* section symbols */ \ 480 (_ofl)->ofl_lregsymcnt) /* local register symbols */ 481 #define DYNSYM_ALL_CNT(_ofl) /* all .dynsym entries */ \ 482 (DYNSYM_LOC_CNT(_ofl) + /* .dynsym locals */ \ 483 (_ofl)->ofl_globcnt) /* standard globals */ 484 485 /* 486 * Define a move descriptor used within relocation structures. 487 */ 488 typedef struct { 489 Move *mr_move; 490 Sym_desc *mr_sym; 491 } Mv_reloc; 492 493 /* 494 * Relocation (active & output) processing structure - transparent to common 495 * code. 496 * 497 * Note that rel_raddend is primarily only of interest to RELA relocations, 498 * and is set to 0 for REL. However, there is an exception: If FLG_REL_NADDEND 499 * is set, then rel_raddend contains a replacement value for the implicit 500 * addend found in the relocation target. 501 */ 502 struct rel_desc { 503 Os_desc *rel_osdesc; /* output section reloc is against */ 504 Is_desc *rel_isdesc; /* input section reloc is against */ 505 const char *rel_sname; /* symbol name (may be "unknown") */ 506 Sym_desc *rel_sym; /* sym relocation is against */ 507 Sym_desc *rel_usym; /* strong sym if this is a weak pair */ 508 Mv_reloc *rel_move; /* move table information */ 509 Word rel_flags; /* misc. flags for relocations */ 510 Word rel_rtype; /* relocation type */ 511 Xword rel_roffset; /* relocation offset */ 512 Sxword rel_raddend; /* addend from input relocation */ 513 Word rel_typedata; /* ELF_R_TYPE_DATA(info) */ 514 }; 515 516 /* 517 * common flags used on the Rel_desc structure (defined in machrel.h). 518 */ 519 #define FLG_REL_GOT 0x00000001 /* relocation against GOT */ 520 #define FLG_REL_PLT 0x00000002 /* relocation against PLT */ 521 #define FLG_REL_BSS 0x00000004 /* relocation against BSS */ 522 #define FLG_REL_LOAD 0x00000008 /* section loadable */ 523 #define FLG_REL_SCNNDX 0x00000010 /* use section index for symbol ndx */ 524 #define FLG_REL_CLVAL 0x00000020 /* clear VALUE for active relocation */ 525 #define FLG_REL_ADVAL 0x00000040 /* add VALUE for output relocation, */ 526 /* only relevant to SPARC and */ 527 /* R_SPARC_RELATIVE */ 528 #define FLG_REL_GOTCL 0x00000080 /* clear the GOT entry. This is */ 529 /* relevant to RELA relocations, */ 530 /* not REL (i386) relocations */ 531 #define FLG_REL_MOVETAB 0x00000100 /* Relocation against .SUNW_move */ 532 /* adjustments required before */ 533 /* actual relocation */ 534 #define FLG_REL_NOINFO 0x00000200 /* Relocation comes from a section */ 535 /* with a null sh_info field */ 536 #define FLG_REL_REG 0x00000400 /* Relocation target is reg sym */ 537 #define FLG_REL_FPTR 0x00000800 /* relocation against func. desc. */ 538 #define FLG_REL_RFPTR1 0x00001000 /* Relative relocation against */ 539 /* 1st part of FD */ 540 #define FLG_REL_RFPTR2 0x00002000 /* Relative relocation against */ 541 /* 2nd part of FD */ 542 #define FLG_REL_DISP 0x00004000 /* *disp* relocation */ 543 #define FLG_REL_STLS 0x00008000 /* IE TLS reference to */ 544 /* static TLS GOT index */ 545 #define FLG_REL_DTLS 0x00010000 /* GD TLS reference relative to */ 546 /* dynamic TLS GOT index */ 547 #define FLG_REL_MTLS 0x00020000 /* LD TLS reference against GOT */ 548 #define FLG_REL_STTLS 0x00040000 /* LE TLS reference directly */ 549 /* to static tls index */ 550 #define FLG_REL_TLSFIX 0x00080000 /* relocation points to TLS instr. */ 551 /* which needs updating */ 552 #define FLG_REL_RELA 0x00100000 /* descriptor captures a Rela */ 553 #define FLG_REL_GOTFIX 0x00200000 /* relocation points to GOTOP instr. */ 554 /* which needs updating */ 555 #define FLG_REL_NADDEND 0x00400000 /* Replace implicit addend in dest */ 556 /* with value in rel_raddend */ 557 /* Relevant to REL (i386) */ 558 /* relocations, not to RELA. */ 559 560 /* 561 * Structure to hold a cache of Relocations. 562 */ 563 struct rel_cache { 564 Rel_desc *rc_end; 565 Rel_desc *rc_free; 566 }; 567 568 /* 569 * Symbol value descriptor. For relocatable objects, each symbols value is 570 * its offset within its associated section. Therefore, to uniquely define 571 * each symbol within a reloctable object, record and sort the sh_offset and 572 * symbol value. This information is used to seach for displacement 573 * relocations as part of copy relocation validation. 574 */ 575 typedef struct { 576 Addr ssv_value; 577 Sym_desc *ssv_sdp; 578 } Ssv_desc; 579 580 /* 581 * Input file processing structures. 582 */ 583 struct ifl_desc { /* input file descriptor */ 584 const char *ifl_name; /* full file name */ 585 const char *ifl_soname; /* shared object name */ 586 dev_t ifl_stdev; /* device id and inode number for .so */ 587 ino_t ifl_stino; /* multiple inclusion checks */ 588 Ehdr *ifl_ehdr; /* elf header describing this file */ 589 Elf *ifl_elf; /* elf descriptor for this file */ 590 Sym_desc **ifl_oldndx; /* original symbol table indices */ 591 Sym_desc *ifl_locs; /* symbol desc version of locals */ 592 Ssv_desc *ifl_sortsyms; /* sorted list of symbols by value */ 593 Word ifl_locscnt; /* no. of local symbols to process */ 594 Word ifl_symscnt; /* total no. of symbols to process */ 595 Word ifl_sortcnt; /* no. of sorted symbols to process */ 596 Word ifl_shnum; /* number of sections in file */ 597 Word ifl_shstrndx; /* index to .shstrtab */ 598 Word ifl_vercnt; /* number of versions in file */ 599 Half ifl_neededndx; /* index to NEEDED in .dyn section */ 600 Word ifl_flags; /* explicit/implicit reference */ 601 Is_desc **ifl_isdesc; /* isdesc[scn ndx] = Is_desc ptr */ 602 Sdf_desc *ifl_sdfdesc; /* control definition */ 603 Versym *ifl_versym; /* version symbol table array */ 604 Ver_index *ifl_verndx; /* verndx[ver ndx] = Ver_index */ 605 APlist *ifl_verdesc; /* version descriptor list */ 606 APlist *ifl_relsect; /* relocation section list */ 607 Alist *ifl_groups; /* SHT_GROUP section list */ 608 }; 609 610 #define FLG_IF_CMDLINE 0x00000001 /* full filename specified from the */ 611 /* command line (no -l) */ 612 #define FLG_IF_NEEDED 0x00000002 /* shared object should be recorded */ 613 #define FLG_IF_DIRECT 0x00000004 /* establish direct bindings to this */ 614 /* object */ 615 #define FLG_IF_EXTRACT 0x00000008 /* file extracted from an archive */ 616 #define FLG_IF_VERNEED 0x00000010 /* version dependency information is */ 617 /* required */ 618 #define FLG_IF_DEPREQD 0x00000020 /* dependency is required to satisfy */ 619 /* symbol references */ 620 #define FLG_IF_NEEDSTR 0x00000040 /* dependency specified by -Nn */ 621 /* flag */ 622 #define FLG_IF_IGNORE 0x00000080 /* ignore unused dependencies */ 623 #define FLG_IF_NODIRECT 0x00000100 /* object contains symbols that */ 624 /* cannot be directly bound to */ 625 #define FLG_IF_LAZYLD 0x00000200 /* bindings to this object should be */ 626 /* lazy loaded */ 627 #define FLG_IF_GRPPRM 0x00000400 /* this dependency should have the */ 628 /* DF_P1_GROUPPERM flag set */ 629 #define FLG_IF_DISPPEND 0x00000800 /* displacement relocation done */ 630 /* in the ld time. */ 631 #define FLG_IF_DISPDONE 0x00001000 /* displacement relocation done */ 632 /* at the run time */ 633 #define FLG_IF_MAPFILE 0x00002000 /* file is a mapfile */ 634 #define FLG_IF_HSTRTAB 0x00004000 /* file has a string section */ 635 #define FLG_IF_FILEREF 0x00008000 /* file contains a section which */ 636 /* is included in the output */ 637 /* allocatable image */ 638 #define FLG_IF_GNUVER 0x00010000 /* file used GNU-style versioning */ 639 #define FLG_IF_ORDERED 0x00020000 /* ordered section processing */ 640 /* required */ 641 642 struct is_desc { /* input section descriptor */ 643 const char *is_name; /* original section name */ 644 Shdr *is_shdr; /* the elf section header */ 645 Ifl_desc *is_file; /* infile desc for this section */ 646 Os_desc *is_osdesc; /* new output section for this */ 647 /* input section */ 648 Elf_Data *is_indata; /* input sections raw data */ 649 Is_desc *is_symshndx; /* related SHT_SYM_SHNDX section */ 650 Is_desc *is_comdatkeep; /* If COMDAT section is discarded, */ 651 /* this is section that was kept */ 652 Word is_scnndx; /* original section index in file */ 653 Word is_ordndx; /* Index for section. Used to decide */ 654 /* where to insert section when */ 655 /* reordering sections */ 656 Word is_keyident; /* key for SHF_{ORDERED|LINK_ORDER} */ 657 /* processing and ident used for */ 658 /* placing/ordering sections */ 659 Word is_flags; /* Various flags */ 660 }; 661 662 #define FLG_IS_ORDERED 0x0001 /* this is a SHF_ORDERED section */ 663 #define FLG_IS_KEY 0x0002 /* section requires sort keys */ 664 #define FLG_IS_DISCARD 0x0004 /* section is to be discarded */ 665 #define FLG_IS_RELUPD 0x0008 /* symbol defined here may have moved */ 666 #define FLG_IS_SECTREF 0x0010 /* section has been referenced */ 667 #define FLG_IS_GDATADEF 0x0020 /* section contains global data sym */ 668 #define FLG_IS_EXTERNAL 0x0040 /* isp from an user file */ 669 #define FLG_IS_INSTRMRG 0x0080 /* Usable SHF_MERGE|SHF_STRINGS sec */ 670 #define FLG_IS_GNSTRMRG 0x0100 /* Generated mergeable string section */ 671 #define FLG_IS_GROUPS 0x0200 /* section has groups to process */ 672 #define FLG_IS_PLACE 0x0400 /* section requires to be placed */ 673 #define FLG_IS_COMDAT 0x0800 /* section is COMDAT */ 674 #define FLG_IS_EHFRAME 0x1000 /* section is .eh_frame */ 675 676 /* 677 * Output sections contain lists of input sections that are assigned to them. 678 * These items fall into 4 categories: 679 * BEFORE - Ordered sections that specify SHN_BEFORE, in input order. 680 * ORDERED - Ordered sections that are sorted using unsorted sections 681 * as the sort key. 682 * DEFAULT - Sections that are placed into the output section 683 * in input order. 684 * AFTER - Ordered sections that specify SHN_AFTER, in input order. 685 */ 686 #define OS_ISD_BEFORE 0 687 #define OS_ISD_ORDERED 1 688 #define OS_ISD_DEFAULT 2 689 #define OS_ISD_AFTER 3 690 #define OS_ISD_NUM 4 691 typedef APlist *os_isdecs_arr[OS_ISD_NUM]; 692 693 /* 694 * Convenience macro for traversing every input section associated 695 * with a given output section. The primary benefit of this macro 696 * is that it preserves a precious level of code indentation in the 697 * code that uses it. 698 */ 699 #define OS_ISDESCS_TRAVERSE(_list_idx, _osp, _idx, _isp) \ 700 for (_list_idx = 0; _list_idx < OS_ISD_NUM; _list_idx++) \ 701 for (APLIST_TRAVERSE(_osp->os_isdescs[_list_idx], _idx, _isp)) 702 703 704 /* 705 * Map file and output file processing structures 706 */ 707 struct os_desc { /* Output section descriptor */ 708 const char *os_name; /* the section name */ 709 Elf_Scn *os_scn; /* the elf section descriptor */ 710 Shdr *os_shdr; /* the elf section header */ 711 Os_desc *os_relosdesc; /* the output relocation section */ 712 APlist *os_relisdescs; /* reloc input section descriptors */ 713 /* for this output section */ 714 os_isdecs_arr os_isdescs; /* lists of input sections in output */ 715 APlist *os_mstrisdescs; /* FLG_IS_INSTRMRG input sections */ 716 Sg_desc *os_sgdesc; /* segment os_desc is placed on */ 717 Elf_Data *os_outdata; /* output sections raw data */ 718 avl_tree_t *os_comdats; /* AVL tree of COMDAT input sections */ 719 /* associated to output section */ 720 Word os_identndx; /* section identifier for input */ 721 /* section processing, followed */ 722 /* by section symbol index */ 723 Word os_ordndx; /* index for section. Used to decide */ 724 /* where to insert section when */ 725 /* reordering sections */ 726 Xword os_szoutrels; /* size of output relocation section */ 727 uint_t os_namehash; /* hash on section name */ 728 uchar_t os_flags; /* various flags */ 729 }; 730 731 #define FLG_OS_KEY 0x01 /* section requires sort keys */ 732 #define FLG_OS_OUTREL 0x02 /* output rel against this section */ 733 #define FLG_OS_SECTREF 0x04 /* isps are not affected by -zignore */ 734 735 /* 736 * Types of segment index. 737 */ 738 typedef enum { 739 LD_PHDR, 740 LD_INTERP, 741 LD_SUNWCAP, 742 LD_TEXT, 743 LD_DATA, 744 LD_BSS, 745 #if defined(_ELF64) 746 LD_LRODATA, /* (amd64-only) */ 747 LD_LDATA, /* (amd64-only) */ 748 #endif 749 LD_DYN, 750 LD_DTRACE, 751 LD_TLS, 752 LD_UNWIND, 753 LD_NOTE, 754 LD_EXTRA, 755 LD_NUM 756 } Segment_id; 757 758 struct sg_desc { /* output segment descriptor */ 759 Segment_id sg_id; /* segment identifier (for sorting) */ 760 Phdr sg_phdr; /* segment header for output file */ 761 const char *sg_name; /* segment name */ 762 Xword sg_round; /* data rounding required (mapfile) */ 763 Xword sg_length; /* maximum segment length; if 0 */ 764 /* segment is not specified */ 765 APlist *sg_osdescs; /* list of output section descriptors */ 766 APlist *sg_secorder; /* list specifying section ordering */ 767 /* for the segment */ 768 Half sg_flags; 769 Sym_desc *sg_sizesym; /* size symbol for this segment */ 770 Xword sg_addralign; /* LCM of sh_addralign */ 771 Elf_Scn *sg_fscn; /* the SCN of the first section. */ 772 }; 773 774 #define FLG_SG_VADDR 0x0001 /* vaddr segment attribute set */ 775 #define FLG_SG_PADDR 0x0002 /* paddr segment attribute set */ 776 #define FLG_SG_LENGTH 0x0004 /* length segment attribute set */ 777 #define FLG_SG_ALIGN 0x0008 /* align segment attribute set */ 778 #define FLG_SG_ROUND 0x0010 /* round segment attribute set */ 779 #define FLG_SG_FLAGS 0x0020 /* flags segment attribute set */ 780 #define FLG_SG_TYPE 0x0040 /* type segment attribute set */ 781 #define FLG_SG_ORDER 0x0080 /* has ordering been turned on for */ 782 /* this segment. */ 783 /* i.e. ?[O] option in mapfile */ 784 #define FLG_SG_NOHDR 0x0100 /* don't map ELF or phdrs into */ 785 /* this segment */ 786 #define FLG_SG_EMPTY 0x0200 /* an empty segment specification */ 787 /* no input sections will be */ 788 /* associated to this section */ 789 #define FLG_SG_KEY 0x0400 /* segment requires sort keys */ 790 #define FLG_SG_DISABLED 0x0800 /* this segment is disabled */ 791 #define FLG_SG_PHREQ 0x1000 /* this segment requires a program */ 792 /* header */ 793 794 struct sec_order { 795 const char *sco_secname; /* section name to be ordered */ 796 Word sco_index; /* ordering index for section */ 797 Half sco_flags; 798 }; 799 800 #define FLG_SGO_USED 0x0001 /* was ordering used? */ 801 802 struct ent_desc { /* input section entrance criteria */ 803 APlist *ec_files; /* files from which to accept */ 804 /* sections */ 805 const char *ec_name; /* name to match (NULL if none) */ 806 Word ec_type; /* section type */ 807 Word ec_attrmask; /* section attribute mask (AWX) */ 808 Word ec_attrbits; /* sections attribute bits */ 809 Sg_desc *ec_segment; /* output segment to enter if matched */ 810 Word ec_ordndx; /* index to determine where section */ 811 /* meeting this criteria should */ 812 /* inserted. Used for reordering */ 813 /* of sections. */ 814 Half ec_flags; 815 }; 816 817 #define FLG_EC_BUILTIN 0x0001 /* built in descriptor */ 818 #define FLG_EC_USED 0x0002 /* entrance criteria met? */ 819 820 /* 821 * One structure is allocated for a move entry, and associated to the symbol 822 * against which a move is targeted. 823 */ 824 typedef struct { 825 Move *md_move; /* original Move entry */ 826 Xword md_start; /* start position */ 827 Xword md_len; /* length of initialization */ 828 Word md_oidx; /* output Move entry index */ 829 } Mv_desc; 830 831 /* 832 * Symbol descriptor. 833 */ 834 typedef Lword sd_flag_t; 835 struct sym_desc { 836 Alist *sd_GOTndxs; /* list of associated GOT entries */ 837 Sym *sd_sym; /* pointer to symbol table entry */ 838 Sym *sd_osym; /* copy of the original symbol entry */ 839 /* used only for local partial */ 840 Alist *sd_move; /* move information associated with a */ 841 /* partially initialized symbol */ 842 const char *sd_name; /* symbols name */ 843 Ifl_desc *sd_file; /* file where symbol is taken */ 844 Is_desc *sd_isc; /* input section of symbol definition */ 845 Sym_aux *sd_aux; /* auxiliary global symbol info. */ 846 Word sd_symndx; /* index in output symbol table */ 847 Word sd_shndx; /* sect. index sym is associated w/ */ 848 sd_flag_t sd_flags; /* state flags */ 849 Half sd_ref; /* reference definition of symbol */ 850 }; 851 852 /* 853 * The auxiliary symbol descriptor contains the additional information (beyond 854 * the symbol descriptor) required to process global symbols. These symbols are 855 * accessed via an internal symbol hash table where locality of reference is 856 * important for performance. 857 */ 858 struct sym_aux { 859 APlist *sa_dfiles; /* files where symbol is defined */ 860 Sym sa_sym; /* copy of symtab entry */ 861 const char *sa_vfile; /* first unavailable definition */ 862 const char *sa_rfile; /* file with first symbol referenced */ 863 Word sa_hash; /* the pure hash value of symbol */ 864 Word sa_PLTndx; /* index into PLT for symbol */ 865 Word sa_PLTGOTndx; /* GOT entry indx for PLT indirection */ 866 Word sa_linkndx; /* index of associated symbol from */ 867 /* ET_DYN file */ 868 Half sa_symspec; /* special symbol ids */ 869 Half sa_overndx; /* output file versioning index */ 870 Half sa_dverndx; /* dependency versioning index */ 871 }; 872 873 /* 874 * Nodes used to track symbols in the global AVL symbol dictionary. 875 */ 876 struct sym_avlnode { 877 avl_node_t sav_node; /* AVL node */ 878 Word sav_hash; /* symbol hash value */ 879 const char *sav_name; /* symbol name */ 880 Sym_desc *sav_sdp; /* symbol descriptor */ 881 }; 882 883 /* 884 * These are the ids for processing of `Special symbols'. They are used 885 * to set the sym->sd_aux->sa_symspec field. 886 */ 887 #define SDAUX_ID_ETEXT 1 /* etext && _etext symbol */ 888 #define SDAUX_ID_EDATA 2 /* edata && _edata symbol */ 889 #define SDAUX_ID_END 3 /* end, _end, && _END_ symbol */ 890 #define SDAUX_ID_DYN 4 /* DYNAMIC && _DYNAMIC symbol */ 891 #define SDAUX_ID_PLT 5 /* _PROCEDURE_LINKAGE_TABLE_ symbol */ 892 #define SDAUX_ID_GOT 6 /* _GLOBAL_OFFSET_TABLE_ symbol */ 893 #define SDAUX_ID_START 7 /* START_ && _START_ symbol */ 894 895 /* 896 * Flags for sym_desc.sd_flags 897 */ 898 #define FLG_SY_MVTOCOMM 0x00000001 /* assign symbol to common (.bss) */ 899 /* this is a result of a */ 900 /* copy reloc against sym */ 901 #define FLG_SY_GLOBREF 0x00000002 /* a global reference has been seen */ 902 #define FLG_SY_WEAKDEF 0x00000004 /* a weak definition has been used */ 903 #define FLG_SY_CLEAN 0x00000008 /* `Sym' entry points to original */ 904 /* input file (read-only). */ 905 #define FLG_SY_UPREQD 0x00000010 /* symbol value update is required, */ 906 /* either it's used as an entry */ 907 /* point or for relocation, but */ 908 /* it must be updated even if */ 909 /* the -s flag is in effect */ 910 #define FLG_SY_NOTAVAIL 0x00000020 /* symbol is not available to the */ 911 /* application either because it */ 912 /* originates from an implicitly */ 913 /* referenced shared object, or */ 914 /* because it is not part of a */ 915 /* specified version. */ 916 #define FLG_SY_REDUCED 0x00000040 /* a global is reduced to local */ 917 #define FLG_SY_VERSPROM 0x00000080 /* version definition has been */ 918 /* promoted to output file */ 919 #define FLG_SY_PROT 0x00000100 /* stv_protected visibility seen */ 920 921 #define FLG_SY_MAPREF 0x00000200 /* symbol reference generated by user */ 922 /* from mapfile */ 923 #define FLG_SY_REFRSD 0x00000400 /* symbols sd_ref has been raised */ 924 /* due to a copy-relocs */ 925 /* weak-strong pairing */ 926 #define FLG_SY_INTPOSE 0x00000800 /* symbol defines an interposer */ 927 #define FLG_SY_INVALID 0x00001000 /* unwanted/erroneous symbol */ 928 #define FLG_SY_SMGOT 0x00002000 /* small got index assigned to symbol */ 929 /* sparc only */ 930 #define FLG_SY_PARENT 0x00004000 /* symbol to be found in parent */ 931 /* only used with direct bindings */ 932 #define FLG_SY_LAZYLD 0x00008000 /* symbol to cause lazyloading of */ 933 /* parent object */ 934 #define FLG_SY_ISDISC 0x00010000 /* symbol is a member of a DISCARDED */ 935 /* section (COMDAT) */ 936 #define FLG_SY_PAREXPN 0x00020000 /* partially init. symbol to be */ 937 /* expanded */ 938 #define FLG_SY_PLTPAD 0x00040000 /* pltpadding has been allocated for */ 939 /* this symbol */ 940 #define FLG_SY_REGSYM 0x00080000 /* REGISTER symbol (sparc only) */ 941 #define FLG_SY_SOFOUND 0x00100000 /* compared against an SO definition */ 942 #define FLG_SY_EXTERN 0x00200000 /* symbol is external, allows -zdefs */ 943 /* error suppression */ 944 #define FLG_SY_MAPUSED 0x00400000 /* mapfile symbol used (occurred */ 945 /* within a relocatable object) */ 946 #define FLG_SY_COMMEXP 0x00800000 /* COMMON symbol which has been */ 947 /* allocated */ 948 #define FLG_SY_CMDREF 0x01000000 /* symbol was referenced from the */ 949 /* command line. (ld -u <>, */ 950 /* ld -zrtldinfo=<>, ...) */ 951 #define FLG_SY_SPECSEC 0x02000000 /* section index is reserved value */ 952 /* ABS, COMMON, ... */ 953 #define FLG_SY_TENTSYM 0x04000000 /* tentative symbol */ 954 #define FLG_SY_VISIBLE 0x08000000 /* symbols visibility determined */ 955 #define FLG_SY_STDFLTR 0x10000000 /* symbol is a standard filter */ 956 #define FLG_SY_AUXFLTR 0x20000000 /* symbol is an auxiliary filter */ 957 #define FLG_SY_DYNSORT 0x40000000 /* req. in dyn[sym|tls]sort section */ 958 #define FLG_SY_NODYNSORT 0x80000000 /* excluded from dyn[sym_tls]sort sec */ 959 960 #define FLG_SY_DEFAULT 0x0000100000000 /* global symbol, default */ 961 #define FLG_SY_SINGLE 0x0000200000000 /* global symbol, singleton defined */ 962 #define FLG_SY_PROTECT 0x0000400000000 /* global symbol, protected defined */ 963 #define FLG_SY_EXPORT 0x0000800000000 /* global symbol, exported defined */ 964 965 #define MSK_SY_GLOBAL \ 966 (FLG_SY_DEFAULT | FLG_SY_SINGLE | FLG_SY_PROTECT | FLG_SY_EXPORT) 967 /* this mask indicates that the */ 968 /* symbol has been explicitly */ 969 /* defined within a mapfile */ 970 /* definition, and is a candidate */ 971 /* for versioning */ 972 973 #define FLG_SY_HIDDEN 0x0001000000000 /* global symbol, reduce to local */ 974 #define FLG_SY_ELIM 0x0002000000000 /* global symbol, eliminate */ 975 #define FLG_SY_IGNORE 0x0004000000000 /* global symbol, ignored */ 976 977 #define MSK_SY_LOCAL (FLG_SY_HIDDEN | FLG_SY_ELIM | FLG_SY_IGNORE) 978 /* this mask allows all local state */ 979 /* flags to be removed when the */ 980 /* symbol is copy relocated */ 981 982 #define FLG_SY_EXPDEF 0x0008000000000 /* symbol visibility defined */ 983 /* explicitly */ 984 985 #define MSK_SY_NOAUTO (FLG_SY_SINGLE | FLG_SY_EXPORT | FLG_SY_EXPDEF) 986 /* this mask indicates that the */ 987 /* symbol is not a candidate for */ 988 /* auto-reduction/elimination */ 989 990 #define FLG_SY_MAPFILE 0x0010000000000 /* symbol attribute defined in a */ 991 /* mapfile */ 992 #define FLG_SY_DIR 0x0020000000000 /* global symbol, direct bindings */ 993 #define FLG_SY_NDIR 0x0040000000000 /* global symbol, nondirect bindings */ 994 #define FLG_SY_OVERLAP 0x0080000000000 /* move entry overlap detected */ 995 996 /* 997 * Create a mask for (sym.st_other & visibility) since the gABI does not yet 998 * define a ELF*_ST_OTHER macro. 999 */ 1000 #define MSK_SYM_VISIBILITY 0x7 1001 1002 /* 1003 * Structure to manage the shared object definition lists. There are two lists 1004 * that use this structure: 1005 * 1006 * - ofl_soneed; maintain the list of implicitly required dependencies 1007 * (ie. shared objects needed by other shared objects). These definitions 1008 * may include RPATH's required to locate the dependencies, and any 1009 * version requirements. 1010 * 1011 * - ofl_socntl; maintains the shared object control definitions. These are 1012 * provided by the user (via a mapfile) and are used to indicate any 1013 * version control requirements. 1014 */ 1015 struct sdf_desc { 1016 const char *sdf_name; /* the shared objects file name */ 1017 char *sdf_rpath; /* library search path DT_RPATH */ 1018 const char *sdf_rfile; /* referencing file for diagnostics */ 1019 Ifl_desc *sdf_file; /* the final input file descriptor */ 1020 Alist *sdf_vers; /* list of versions that are required */ 1021 /* from this object */ 1022 Alist *sdf_verneed; /* list of VERNEEDS to create for */ 1023 /* object via mapfile ADDVERS */ 1024 Word sdf_flags; 1025 }; 1026 1027 #define FLG_SDF_SELECT 0x01 /* version control selection required */ 1028 #define FLG_SDF_VERIFY 0x02 /* version definition verification */ 1029 /* required */ 1030 #define FLG_SDF_ADDVER 0x04 /* add VERNEED references */ 1031 1032 /* 1033 * Structure to manage shared object version usage requirements. 1034 */ 1035 struct sdv_desc { 1036 const char *sdv_name; /* version name */ 1037 const char *sdv_ref; /* versions reference */ 1038 Word sdv_flags; /* flags */ 1039 }; 1040 1041 #define FLG_SDV_MATCHED 0x01 /* VERDEF found and matched */ 1042 1043 /* 1044 * Structures to manage versioning information. Two versioning structures are 1045 * defined: 1046 * 1047 * - a version descriptor maintains a linked list of versions and their 1048 * associated dependencies. This is used to build the version definitions 1049 * for an image being created (see map_symbol), and to determine the 1050 * version dependency graph for any input files that are versioned. 1051 * 1052 * - a version index array contains each version of an input file that is 1053 * being processed. It informs us which versions are available for 1054 * binding, and is used to generate any version dependency information. 1055 */ 1056 struct ver_desc { 1057 const char *vd_name; /* version name */ 1058 Ifl_desc *vd_file; /* file that defined version */ 1059 Word vd_hash; /* hash value of name */ 1060 Half vd_ndx; /* coordinates with symbol index */ 1061 Half vd_flags; /* version information */ 1062 APlist *vd_deps; /* version dependencies */ 1063 Ver_desc *vd_ref; /* dependency's first reference */ 1064 }; 1065 1066 struct ver_index { 1067 const char *vi_name; /* dependency version name */ 1068 Half vi_flags; /* communicates availability */ 1069 Half vi_overndx; /* Index asssigned to this version in */ 1070 /* output object Verneed section */ 1071 Ver_desc *vi_desc; /* cross reference to descriptor */ 1072 }; 1073 1074 /* 1075 * Define any internal version descriptor flags ([vd|vi]_flags). Note that the 1076 * first byte is reserved for user visible flags (refer VER_FLG's in link.h). 1077 */ 1078 #define MSK_VER_USER 0x0f /* mask for user visible flags */ 1079 1080 #define FLG_VER_AVAIL 0x10 /* version is available for binding */ 1081 #define FLG_VER_REFER 0x20 /* version has been referenced */ 1082 #define FLG_VER_CYCLIC 0x40 /* a member of cyclic dependency */ 1083 1084 /* 1085 * isalist(1) descriptor - used to break an isalist string into its component 1086 * options. 1087 */ 1088 struct isa_opt { 1089 char *isa_name; /* individual isa option name */ 1090 size_t isa_namesz; /* and associated size */ 1091 }; 1092 1093 struct isa_desc { 1094 char *isa_list; /* sysinfo(SI_ISALIST) list */ 1095 size_t isa_listsz; /* and associated size */ 1096 Isa_opt *isa_opt; /* table of individual isa options */ 1097 size_t isa_optno; /* and associated number */ 1098 }; 1099 1100 /* 1101 * uname(2) descriptor - used to break a utsname structure into its component 1102 * options (at least those that we're interested in). 1103 */ 1104 struct uts_desc { 1105 char *uts_osname; /* operating system name */ 1106 size_t uts_osnamesz; /* and associated size */ 1107 char *uts_osrel; /* operating system release */ 1108 size_t uts_osrelsz; /* and associated size */ 1109 }; 1110 1111 /* 1112 * SHT_GROUP descriptor - used to track group sections at the global 1113 * level to resolve conflicts and determine which to keep. 1114 */ 1115 struct group_desc { 1116 Is_desc *gd_isc; /* input section descriptor */ 1117 Is_desc *gd_oisc; /* overriding input section */ 1118 /* descriptor when discarded */ 1119 const char *gd_name; /* group name (signature symbol) */ 1120 Word *gd_data; /* data for group section */ 1121 size_t gd_cnt; /* number of entries in group data */ 1122 }; 1123 1124 /* 1125 * Indexes into the ld_support_funcs[] table. 1126 */ 1127 typedef enum { 1128 LDS_VERSION = 0, /* Must be first and have value 0 */ 1129 LDS_INPUT_DONE, 1130 LDS_START, 1131 LDS_ATEXIT, 1132 LDS_OPEN, 1133 LDS_FILE, 1134 LDS_INSEC, 1135 LDS_SEC, 1136 LDS_NUM 1137 } Support_ndx; 1138 1139 /* 1140 * Structure to manage archive member caching. Each archive has an archive 1141 * descriptor (Ar_desc) associated with it. This contains pointers to the 1142 * archive symbol table (obtained by elf_getarsyms(3e)) and an auxiliary 1143 * structure (Ar_uax[]) that parallels this symbol table. The member element 1144 * of this auxiliary table indicates whether the archive member associated with 1145 * the symbol offset has already been extracted (AREXTRACTED) or partially 1146 * processed (refer process_member()). 1147 */ 1148 typedef struct ar_mem { 1149 Elf *am_elf; /* elf descriptor for this member */ 1150 char *am_name; /* members name */ 1151 char *am_path; /* path (ie. lib(foo.o)) */ 1152 Sym *am_syms; /* start of global symbols */ 1153 char *am_strs; /* associated string table start */ 1154 Xword am_symn; /* no. of global symbols */ 1155 } Ar_mem; 1156 1157 typedef struct ar_aux { 1158 Sym_desc *au_syms; /* internal symbol descriptor */ 1159 Ar_mem *au_mem; /* associated member */ 1160 } Ar_aux; 1161 1162 #define FLG_ARMEM_PROC (Ar_mem *)-1 1163 1164 typedef struct ar_desc { 1165 const char *ad_name; /* archive file name */ 1166 Elf *ad_elf; /* elf descriptor for the archive */ 1167 Elf_Arsym *ad_start; /* archive symbol table start */ 1168 Ar_aux *ad_aux; /* auxiliary symbol information */ 1169 dev_t ad_stdev; /* device id and inode number for */ 1170 ino_t ad_stino; /* multiple inclusion checks */ 1171 ofl_flag_t ad_flags; /* archive specific cmd line flags */ 1172 } Ar_desc; 1173 1174 /* 1175 * Define any archive descriptor flags. NOTE, make sure they do not clash with 1176 * any output file descriptor archive extraction flags, as these are saved in 1177 * the same entry (see MSK_OF1_ARCHIVE). 1178 */ 1179 #define FLG_ARD_EXTRACT 0x00010000 /* archive member has been extracted */ 1180 1181 /* 1182 * Function Declarations. 1183 */ 1184 #if defined(_ELF64) 1185 1186 #define ld_create_outfile ld64_create_outfile 1187 #define ld_ent_setup ld64_ent_setup 1188 #define ld_init_strings ld64_init_strings 1189 #define ld_init_target ld64_init_target 1190 #define ld_make_sections ld64_make_sections 1191 #define ld_main ld64_main 1192 #define ld_ofl_cleanup ld64_ofl_cleanup 1193 #define ld_process_mem ld64_process_mem 1194 #define ld_reloc_init ld64_reloc_init 1195 #define ld_reloc_process ld64_reloc_process 1196 #define ld_sym_validate ld64_sym_validate 1197 #define ld_update_outfile ld64_update_outfile 1198 1199 #else 1200 1201 #define ld_create_outfile ld32_create_outfile 1202 #define ld_ent_setup ld32_ent_setup 1203 #define ld_init_strings ld32_init_strings 1204 #define ld_init_target ld32_init_target 1205 #define ld_make_sections ld32_make_sections 1206 #define ld_main ld32_main 1207 #define ld_ofl_cleanup ld32_ofl_cleanup 1208 #define ld_process_mem ld32_process_mem 1209 #define ld_reloc_init ld32_reloc_init 1210 #define ld_reloc_process ld32_reloc_process 1211 #define ld_sym_validate ld32_sym_validate 1212 #define ld_update_outfile ld32_update_outfile 1213 1214 #endif 1215 1216 extern int ld_getopt(Lm_list *, int, int, char **); 1217 1218 extern int ld32_main(int, char **, Half); 1219 extern int ld64_main(int, char **, Half); 1220 1221 extern uintptr_t ld_create_outfile(Ofl_desc *); 1222 extern uintptr_t ld_ent_setup(Ofl_desc *, Xword); 1223 extern uintptr_t ld_init_strings(Ofl_desc *); 1224 extern int ld_init_target(Lm_list *, Half mach); 1225 extern uintptr_t ld_make_sections(Ofl_desc *); 1226 extern void ld_ofl_cleanup(Ofl_desc *); 1227 extern Ifl_desc *ld_process_mem(const char *, const char *, char *, 1228 size_t, Ofl_desc *, Rej_desc *); 1229 extern uintptr_t ld_reloc_init(Ofl_desc *); 1230 extern uintptr_t ld_reloc_process(Ofl_desc *); 1231 extern uintptr_t ld_sym_validate(Ofl_desc *); 1232 extern uintptr_t ld_update_outfile(Ofl_desc *); 1233 1234 #ifdef __cplusplus 1235 } 1236 #endif 1237 1238 #endif /* _LIBLD_H */ 1239