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 */ 371 372 /* 373 * In the flags1 arena, establish any options that are applicable to archive 374 * extraction first, and associate a mask. These values are recorded with any 375 * archive descriptor so that they may be reset should the archive require a 376 * rescan to try and resolve undefined symbols. 377 */ 378 #define FLG_OF1_ALLEXRT 0x00000001 /* extract all members from an */ 379 /* archive file */ 380 #define FLG_OF1_WEAKEXT 0x00000002 /* allow archive extraction to */ 381 /* resolve weak references */ 382 #define MSK_OF1_ARCHIVE 0x00000003 /* archive flags mask */ 383 384 #define FLG_OF1_NOINTRP 0x00000008 /* -z nointerp flag set */ 385 #define FLG_OF1_ZDIRECT 0x00000010 /* -z direct flag set */ 386 #define FLG_OF1_NDIRECT 0x00000020 /* no-direct bindings specified */ 387 #define FLG_OF1_OVHWCAP 0x00000040 /* override any input hardware or */ 388 #define FLG_OF1_OVSFCAP 0x00000080 /* software capabilities */ 389 #define FLG_OF1_RELDYN 0x00000100 /* process .dynamic in rel obj */ 390 #define FLG_OF1_NRLXREL 0x00000200 /* -z norelaxreloc flag set */ 391 #define FLG_OF1_RLXREL 0x00000400 /* -z relaxreloc flag set */ 392 #define FLG_OF1_IGNORE 0x00000800 /* ignore unused dependencies */ 393 394 #define FLG_OF1_NOSGHND 0x00001000 /* -z nosighandler flag set */ 395 #define FLG_OF1_TEXTOFF 0x00002000 /* text relocations are ok */ 396 #define FLG_OF1_ABSEXEC 0x00004000 /* -zabsexec set */ 397 #define FLG_OF1_LAZYLD 0x00008000 /* lazy loading of objects enabled */ 398 #define FLG_OF1_GRPPRM 0x00010000 /* dependencies are to have */ 399 /* GROUPPERM enabled */ 400 #define FLG_OF1_OVRFLW 0x00020000 /* size exceeds 32-bit limitation */ 401 /* of 32-bit libld */ 402 #define FLG_OF1_NOPARTI 0x00040000 /* -znopartial set */ 403 #define FLG_OF1_BSSOREL 0x00080000 /* output relocation against bss */ 404 /* section */ 405 #define FLG_OF1_TLSOREL 0x00100000 /* output relocation against .tlsbss */ 406 /* section */ 407 #define FLG_OF1_MEMORY 0x00200000 /* produce a memory model */ 408 #define FLG_OF1_NGLBDIR 0x00400000 /* no DT_1_DIRECT flag allowed */ 409 #define FLG_OF1_ENCDIFF 0x00800000 /* Host running linker has different */ 410 /* byte order than output object */ 411 #define FLG_OF1_VADDR 0x01000000 /* user segment defines a vaddr */ 412 #define FLG_OF1_EXTRACT 0x02000000 /* archive member has been extracted */ 413 #define FLG_OF1_RESCAN 0x04000000 /* any archives should be rescanned */ 414 #define FLG_OF1_IGNPRC 0x08000000 /* ignore processing required */ 415 #define FLG_OF1_NCSTTAB 0x10000000 /* -znocompstrtab set */ 416 #define FLG_OF1_DONE 0x20000000 /* link-editor processing complete */ 417 #define FLG_OF1_NONREG 0x40000000 /* non-regular file specified as */ 418 /* the output file */ 419 #define FLG_OF1_ALNODIR 0x80000000 /* establish NODIRECT for all */ 420 /* exported interfaces. */ 421 422 /* 423 * Test to see if the output file would allow the presence of 424 * a .dynsym section. 425 */ 426 #define OFL_ALLOW_DYNSYM(_ofl) (((_ofl)->ofl_flags & \ 427 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == FLG_OF_DYNAMIC) 428 429 /* 430 * Test to see if the output file would allow the presence of 431 * a .SUNW_ldynsym section. The requirements are that a .dynsym 432 * is allowed, and -znoldynsym has not been specified. Note that 433 * even if the answer is True (1), we will only generate one if there 434 * are local symbols that require it. 435 */ 436 #define OFL_ALLOW_LDYNSYM(_ofl) (((_ofl)->ofl_flags & \ 437 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ | FLG_OF_NOLDYNSYM)) == FLG_OF_DYNAMIC) 438 439 /* 440 * Test to see if relocation processing should be done. This is normally 441 * true, but can be disabled via the '-z noreloc' option. Note that 442 * relocatable objects are still relocated even if '-z noreloc' is present. 443 */ 444 #define OFL_DO_RELOC(_ofl) (((_ofl)->ofl_flags & FLG_OF_RELOBJ) || \ 445 !((_ofl)->ofl_dtflags_1 & DF_1_NORELOC)) 446 447 /* 448 * Determine whether a static executable is being built. 449 */ 450 #define OFL_IS_STATIC_EXEC(_ofl) (((_ofl)->ofl_flags & \ 451 (FLG_OF_STATIC | FLG_OF_EXEC)) == (FLG_OF_STATIC | FLG_OF_EXEC)) 452 453 /* 454 * Determine whether a static object is being built. This macro is used 455 * to select the appropriate string table, and symbol table that other 456 * sections need to reference. 457 */ 458 #define OFL_IS_STATIC_OBJ(_ofl) ((_ofl)->ofl_flags & \ 459 (FLG_OF_RELOBJ | FLG_OF_STATIC)) 460 461 /* 462 * Macros for counting symbol table entries. These are used to size symbol 463 * tables and associated sections (.syminfo, SUNW_capinfo, .hash, etc.) and 464 * set required sh_info entries (the offset to the first global symbol). 465 */ 466 #define SYMTAB_LOC_CNT(_ofl) /* local .symtab entries */ \ 467 (2 + /* NULL and STT_FILE */ \ 468 (_ofl)->ofl_shdrcnt + /* section symbol */ \ 469 (_ofl)->ofl_scopecnt + /* scoped symbols */ \ 470 (_ofl)->ofl_locscnt) /* standard locals */ 471 #define SYMTAB_ALL_CNT(_ofl) /* all .symtab entries */ \ 472 (SYMTAB_LOC_CNT(_ofl) + /* .symtab locals */ \ 473 (_ofl)->ofl_globcnt) /* standard globals */ 474 475 #define DYNSYM_LOC_CNT(_ofl) /* local .dynsym entries */ \ 476 (1 + /* NULL */ \ 477 (_ofl)->ofl_dynshdrcnt + /* section symbols */ \ 478 (_ofl)->ofl_lregsymcnt) /* local register symbols */ 479 #define DYNSYM_ALL_CNT(_ofl) /* all .dynsym entries */ \ 480 (DYNSYM_LOC_CNT(_ofl) + /* .dynsym locals */ \ 481 (_ofl)->ofl_globcnt) /* standard globals */ 482 483 /* 484 * Define a move descriptor used within relocation structures. 485 */ 486 typedef struct { 487 Move *mr_move; 488 Sym_desc *mr_sym; 489 } Mv_reloc; 490 491 /* 492 * Relocation (active & output) processing structure - transparent to common 493 * code. 494 * 495 * Note that rel_raddend is primarily only of interest to RELA relocations, 496 * and is set to 0 for REL. However, there is an exception: If FLG_REL_NADDEND 497 * is set, then rel_raddend contains a replacement value for the implicit 498 * addend found in the relocation target. 499 */ 500 struct rel_desc { 501 Os_desc *rel_osdesc; /* output section reloc is against */ 502 Is_desc *rel_isdesc; /* input section reloc is against */ 503 const char *rel_sname; /* symbol name (may be "unknown") */ 504 Sym_desc *rel_sym; /* sym relocation is against */ 505 Sym_desc *rel_usym; /* strong sym if this is a weak pair */ 506 Mv_reloc *rel_move; /* move table information */ 507 Word rel_flags; /* misc. flags for relocations */ 508 Word rel_rtype; /* relocation type */ 509 Xword rel_roffset; /* relocation offset */ 510 Sxword rel_raddend; /* addend from input relocation */ 511 Word rel_typedata; /* ELF_R_TYPE_DATA(info) */ 512 }; 513 514 /* 515 * common flags used on the Rel_desc structure (defined in machrel.h). 516 */ 517 #define FLG_REL_GOT 0x00000001 /* relocation against GOT */ 518 #define FLG_REL_PLT 0x00000002 /* relocation against PLT */ 519 #define FLG_REL_BSS 0x00000004 /* relocation against BSS */ 520 #define FLG_REL_LOAD 0x00000008 /* section loadable */ 521 #define FLG_REL_SCNNDX 0x00000010 /* use section index for symbol ndx */ 522 #define FLG_REL_CLVAL 0x00000020 /* clear VALUE for active relocation */ 523 #define FLG_REL_ADVAL 0x00000040 /* add VALUE for output relocation, */ 524 /* only relevant to SPARC and */ 525 /* R_SPARC_RELATIVE */ 526 #define FLG_REL_GOTCL 0x00000080 /* clear the GOT entry. This is */ 527 /* relevant to RELA relocations, */ 528 /* not REL (i386) relocations */ 529 #define FLG_REL_MOVETAB 0x00000100 /* Relocation against .SUNW_move */ 530 /* adjustments required before */ 531 /* actual relocation */ 532 #define FLG_REL_NOINFO 0x00000200 /* Relocation comes from a section */ 533 /* with a null sh_info field */ 534 #define FLG_REL_REG 0x00000400 /* Relocation target is reg sym */ 535 #define FLG_REL_FPTR 0x00000800 /* relocation against func. desc. */ 536 #define FLG_REL_RFPTR1 0x00001000 /* Relative relocation against */ 537 /* 1st part of FD */ 538 #define FLG_REL_RFPTR2 0x00002000 /* Relative relocation against */ 539 /* 2nd part of FD */ 540 #define FLG_REL_DISP 0x00004000 /* *disp* relocation */ 541 #define FLG_REL_STLS 0x00008000 /* IE TLS reference to */ 542 /* static TLS GOT index */ 543 #define FLG_REL_DTLS 0x00010000 /* GD TLS reference relative to */ 544 /* dynamic TLS GOT index */ 545 #define FLG_REL_MTLS 0x00020000 /* LD TLS reference against GOT */ 546 #define FLG_REL_STTLS 0x00040000 /* LE TLS reference directly */ 547 /* to static tls index */ 548 #define FLG_REL_TLSFIX 0x00080000 /* relocation points to TLS instr. */ 549 /* which needs updating */ 550 #define FLG_REL_RELA 0x00100000 /* descriptor captures a Rela */ 551 #define FLG_REL_GOTFIX 0x00200000 /* relocation points to GOTOP instr. */ 552 /* which needs updating */ 553 #define FLG_REL_NADDEND 0x00400000 /* Replace implicit addend in dest */ 554 /* with value in rel_raddend */ 555 /* Relevant to REL (i386) */ 556 /* relocations, not to RELA. */ 557 558 /* 559 * Structure to hold a cache of Relocations. 560 */ 561 struct rel_cache { 562 Rel_desc *rc_end; 563 Rel_desc *rc_free; 564 }; 565 566 /* 567 * Symbol value descriptor. For relocatable objects, each symbols value is 568 * its offset within its associated section. Therefore, to uniquely define 569 * each symbol within a reloctable object, record and sort the sh_offset and 570 * symbol value. This information is used to seach for displacement 571 * relocations as part of copy relocation validation. 572 */ 573 typedef struct { 574 Addr ssv_value; 575 Sym_desc *ssv_sdp; 576 } Ssv_desc; 577 578 /* 579 * Input file processing structures. 580 */ 581 struct ifl_desc { /* input file descriptor */ 582 const char *ifl_name; /* full file name */ 583 const char *ifl_soname; /* shared object name */ 584 dev_t ifl_stdev; /* device id and inode number for .so */ 585 ino_t ifl_stino; /* multiple inclusion checks */ 586 Ehdr *ifl_ehdr; /* elf header describing this file */ 587 Elf *ifl_elf; /* elf descriptor for this file */ 588 Sym_desc **ifl_oldndx; /* original symbol table indices */ 589 Sym_desc *ifl_locs; /* symbol desc version of locals */ 590 Ssv_desc *ifl_sortsyms; /* sorted list of symbols by value */ 591 Word ifl_locscnt; /* no. of local symbols to process */ 592 Word ifl_symscnt; /* total no. of symbols to process */ 593 Word ifl_sortcnt; /* no. of sorted symbols to process */ 594 Word ifl_shnum; /* number of sections in file */ 595 Word ifl_shstrndx; /* index to .shstrtab */ 596 Word ifl_vercnt; /* number of versions in file */ 597 Half ifl_neededndx; /* index to NEEDED in .dyn section */ 598 Word ifl_flags; /* explicit/implicit reference */ 599 Is_desc **ifl_isdesc; /* isdesc[scn ndx] = Is_desc ptr */ 600 Sdf_desc *ifl_sdfdesc; /* control definition */ 601 Versym *ifl_versym; /* version symbol table array */ 602 Ver_index *ifl_verndx; /* verndx[ver ndx] = Ver_index */ 603 APlist *ifl_verdesc; /* version descriptor list */ 604 APlist *ifl_relsect; /* relocation section list */ 605 Alist *ifl_groups; /* SHT_GROUP section list */ 606 }; 607 608 #define FLG_IF_CMDLINE 0x00000001 /* full filename specified from the */ 609 /* command line (no -l) */ 610 #define FLG_IF_NEEDED 0x00000002 /* shared object should be recorded */ 611 #define FLG_IF_DIRECT 0x00000004 /* establish direct bindings to this */ 612 /* object */ 613 #define FLG_IF_EXTRACT 0x00000008 /* file extracted from an archive */ 614 #define FLG_IF_VERNEED 0x00000010 /* version dependency information is */ 615 /* required */ 616 #define FLG_IF_DEPREQD 0x00000020 /* dependency is required to satisfy */ 617 /* symbol references */ 618 #define FLG_IF_NEEDSTR 0x00000040 /* dependency specified by -Nn */ 619 /* flag */ 620 #define FLG_IF_IGNORE 0x00000080 /* ignore unused dependencies */ 621 #define FLG_IF_NODIRECT 0x00000100 /* object contains symbols that */ 622 /* cannot be directly bound to */ 623 #define FLG_IF_LAZYLD 0x00000200 /* bindings to this object should be */ 624 /* lazy loaded */ 625 #define FLG_IF_GRPPRM 0x00000400 /* this dependency should have the */ 626 /* DF_P1_GROUPPERM flag set */ 627 #define FLG_IF_DISPPEND 0x00000800 /* displacement relocation done */ 628 /* in the ld time. */ 629 #define FLG_IF_DISPDONE 0x00001000 /* displacement relocation done */ 630 /* at the run time */ 631 #define FLG_IF_MAPFILE 0x00002000 /* file is a mapfile */ 632 #define FLG_IF_HSTRTAB 0x00004000 /* file has a string section */ 633 #define FLG_IF_FILEREF 0x00008000 /* file contains a section which */ 634 /* is included in the output */ 635 /* allocatable image */ 636 #define FLG_IF_GNUVER 0x00010000 /* file used GNU-style versioning */ 637 #define FLG_IF_ORDERED 0x00020000 /* ordered section processing */ 638 /* required */ 639 640 struct is_desc { /* input section descriptor */ 641 const char *is_name; /* original section name */ 642 Shdr *is_shdr; /* the elf section header */ 643 Ifl_desc *is_file; /* infile desc for this section */ 644 Os_desc *is_osdesc; /* new output section for this */ 645 /* input section */ 646 Elf_Data *is_indata; /* input sections raw data */ 647 Is_desc *is_symshndx; /* related SHT_SYM_SHNDX section */ 648 Is_desc *is_comdatkeep; /* If COMDAT section is discarded, */ 649 /* this is section that was kept */ 650 Word is_scnndx; /* original section index in file */ 651 Word is_ordndx; /* Index for section. Used to decide */ 652 /* where to insert section when */ 653 /* reordering sections */ 654 Word is_keyident; /* key for SHF_{ORDERED|LINK_ORDER} */ 655 /* processing and ident used for */ 656 /* placing/ordering sections */ 657 Word is_flags; /* Various flags */ 658 }; 659 660 #define FLG_IS_ORDERED 0x0001 /* this is a SHF_ORDERED section */ 661 #define FLG_IS_KEY 0x0002 /* section requires sort keys */ 662 #define FLG_IS_DISCARD 0x0004 /* section is to be discarded */ 663 #define FLG_IS_RELUPD 0x0008 /* symbol defined here may have moved */ 664 #define FLG_IS_SECTREF 0x0010 /* section has been referenced */ 665 #define FLG_IS_GDATADEF 0x0020 /* section contains global data sym */ 666 #define FLG_IS_EXTERNAL 0x0040 /* isp from an user file */ 667 #define FLG_IS_INSTRMRG 0x0080 /* Usable SHF_MERGE|SHF_STRINGS sec */ 668 #define FLG_IS_GNSTRMRG 0x0100 /* Generated mergeable string section */ 669 #define FLG_IS_GROUPS 0x0200 /* section has groups to process */ 670 #define FLG_IS_PLACE 0x0400 /* section requires to be placed */ 671 #define FLG_IS_COMDAT 0x0800 /* section is COMDAT */ 672 #define FLG_IS_EHFRAME 0x1000 /* section is .eh_frame */ 673 674 /* 675 * Output sections contain lists of input sections that are assigned to them. 676 * These items fall into 4 categories: 677 * BEFORE - Ordered sections that specify SHN_BEFORE, in input order. 678 * ORDERED - Ordered sections that are sorted using unsorted sections 679 * as the sort key. 680 * DEFAULT - Sections that are placed into the output section 681 * in input order. 682 * AFTER - Ordered sections that specify SHN_AFTER, in input order. 683 */ 684 #define OS_ISD_BEFORE 0 685 #define OS_ISD_ORDERED 1 686 #define OS_ISD_DEFAULT 2 687 #define OS_ISD_AFTER 3 688 #define OS_ISD_NUM 4 689 typedef APlist *os_isdecs_arr[OS_ISD_NUM]; 690 691 /* 692 * Convenience macro for traversing every input section associated 693 * with a given output section. The primary benefit of this macro 694 * is that it preserves a precious level of code indentation in the 695 * code that uses it. 696 */ 697 #define OS_ISDESCS_TRAVERSE(_list_idx, _osp, _idx, _isp) \ 698 for (_list_idx = 0; _list_idx < OS_ISD_NUM; _list_idx++) \ 699 for (APLIST_TRAVERSE(_osp->os_isdescs[_list_idx], _idx, _isp)) 700 701 702 /* 703 * Map file and output file processing structures 704 */ 705 struct os_desc { /* Output section descriptor */ 706 const char *os_name; /* the section name */ 707 Elf_Scn *os_scn; /* the elf section descriptor */ 708 Shdr *os_shdr; /* the elf section header */ 709 Os_desc *os_relosdesc; /* the output relocation section */ 710 APlist *os_relisdescs; /* reloc input section descriptors */ 711 /* for this output section */ 712 os_isdecs_arr os_isdescs; /* lists of input sections in output */ 713 APlist *os_mstrisdescs; /* FLG_IS_INSTRMRG input sections */ 714 Sg_desc *os_sgdesc; /* segment os_desc is placed on */ 715 Elf_Data *os_outdata; /* output sections raw data */ 716 avl_tree_t *os_comdats; /* AVL tree of COMDAT input sections */ 717 /* associated to output section */ 718 Word os_identndx; /* section identifier for input */ 719 /* section processing, followed */ 720 /* by section symbol index */ 721 Word os_ordndx; /* index for section. Used to decide */ 722 /* where to insert section when */ 723 /* reordering sections */ 724 Xword os_szoutrels; /* size of output relocation section */ 725 uint_t os_namehash; /* hash on section name */ 726 uchar_t os_flags; /* various flags */ 727 }; 728 729 #define FLG_OS_KEY 0x01 /* section requires sort keys */ 730 #define FLG_OS_OUTREL 0x02 /* output rel against this section */ 731 #define FLG_OS_SECTREF 0x04 /* isps are not affected by -zignore */ 732 733 /* 734 * Types of segment index. 735 */ 736 typedef enum { 737 LD_PHDR, 738 LD_INTERP, 739 LD_SUNWCAP, 740 LD_TEXT, 741 LD_DATA, 742 LD_BSS, 743 #if defined(_ELF64) 744 LD_LRODATA, /* (amd64-only) */ 745 LD_LDATA, /* (amd64-only) */ 746 #endif 747 LD_DYN, 748 LD_DTRACE, 749 LD_TLS, 750 LD_UNWIND, 751 LD_NOTE, 752 LD_EXTRA, 753 LD_NUM 754 } Segment_id; 755 756 struct sg_desc { /* output segment descriptor */ 757 Segment_id sg_id; /* segment identifier (for sorting) */ 758 Phdr sg_phdr; /* segment header for output file */ 759 const char *sg_name; /* segment name */ 760 Xword sg_round; /* data rounding required (mapfile) */ 761 Xword sg_length; /* maximum segment length; if 0 */ 762 /* segment is not specified */ 763 APlist *sg_osdescs; /* list of output section descriptors */ 764 APlist *sg_secorder; /* list specifying section ordering */ 765 /* for the segment */ 766 Half sg_flags; 767 Sym_desc *sg_sizesym; /* size symbol for this segment */ 768 Xword sg_addralign; /* LCM of sh_addralign */ 769 Elf_Scn *sg_fscn; /* the SCN of the first section. */ 770 }; 771 772 #define FLG_SG_VADDR 0x0001 /* vaddr segment attribute set */ 773 #define FLG_SG_PADDR 0x0002 /* paddr segment attribute set */ 774 #define FLG_SG_LENGTH 0x0004 /* length segment attribute set */ 775 #define FLG_SG_ALIGN 0x0008 /* align segment attribute set */ 776 #define FLG_SG_ROUND 0x0010 /* round segment attribute set */ 777 #define FLG_SG_FLAGS 0x0020 /* flags segment attribute set */ 778 #define FLG_SG_TYPE 0x0040 /* type segment attribute set */ 779 #define FLG_SG_ORDER 0x0080 /* has ordering been turned on for */ 780 /* this segment. */ 781 /* i.e. ?[O] option in mapfile */ 782 #define FLG_SG_NOHDR 0x0100 /* don't map ELF or phdrs into */ 783 /* this segment */ 784 #define FLG_SG_EMPTY 0x0200 /* an empty segment specification */ 785 /* no input sections will be */ 786 /* associated to this section */ 787 #define FLG_SG_KEY 0x0400 /* segment requires sort keys */ 788 #define FLG_SG_DISABLED 0x0800 /* this segment is disabled */ 789 #define FLG_SG_PHREQ 0x1000 /* this segment requires a program */ 790 /* header */ 791 792 struct sec_order { 793 const char *sco_secname; /* section name to be ordered */ 794 Word sco_index; /* ordering index for section */ 795 Half sco_flags; 796 }; 797 798 #define FLG_SGO_USED 0x0001 /* was ordering used? */ 799 800 struct ent_desc { /* input section entrance criteria */ 801 APlist *ec_files; /* files from which to accept */ 802 /* sections */ 803 const char *ec_name; /* name to match (NULL if none) */ 804 Word ec_type; /* section type */ 805 Word ec_attrmask; /* section attribute mask (AWX) */ 806 Word ec_attrbits; /* sections attribute bits */ 807 Sg_desc *ec_segment; /* output segment to enter if matched */ 808 Word ec_ordndx; /* index to determine where section */ 809 /* meeting this criteria should */ 810 /* inserted. Used for reordering */ 811 /* of sections. */ 812 Half ec_flags; 813 }; 814 815 #define FLG_EC_BUILTIN 0x0001 /* built in descriptor */ 816 #define FLG_EC_USED 0x0002 /* entrance criteria met? */ 817 818 /* 819 * One structure is allocated for a move entry, and associated to the symbol 820 * against which a move is targeted. 821 */ 822 typedef struct { 823 Move *md_move; /* original Move entry */ 824 Xword md_start; /* start position */ 825 Xword md_len; /* length of initialization */ 826 Word md_oidx; /* output Move entry index */ 827 } Mv_desc; 828 829 /* 830 * Symbol descriptor. 831 */ 832 typedef Lword sd_flag_t; 833 struct sym_desc { 834 Alist *sd_GOTndxs; /* list of associated GOT entries */ 835 Sym *sd_sym; /* pointer to symbol table entry */ 836 Sym *sd_osym; /* copy of the original symbol entry */ 837 /* used only for local partial */ 838 Alist *sd_move; /* move information associated with a */ 839 /* partially initialized symbol */ 840 const char *sd_name; /* symbols name */ 841 Ifl_desc *sd_file; /* file where symbol is taken */ 842 Is_desc *sd_isc; /* input section of symbol definition */ 843 Sym_aux *sd_aux; /* auxiliary global symbol info. */ 844 Word sd_symndx; /* index in output symbol table */ 845 Word sd_shndx; /* sect. index sym is associated w/ */ 846 sd_flag_t sd_flags; /* state flags */ 847 Half sd_ref; /* reference definition of symbol */ 848 }; 849 850 /* 851 * The auxiliary symbol descriptor contains the additional information (beyond 852 * the symbol descriptor) required to process global symbols. These symbols are 853 * accessed via an internal symbol hash table where locality of reference is 854 * important for performance. 855 */ 856 struct sym_aux { 857 APlist *sa_dfiles; /* files where symbol is defined */ 858 Sym sa_sym; /* copy of symtab entry */ 859 const char *sa_vfile; /* first unavailable definition */ 860 const char *sa_rfile; /* file with first symbol referenced */ 861 Word sa_hash; /* the pure hash value of symbol */ 862 Word sa_PLTndx; /* index into PLT for symbol */ 863 Word sa_PLTGOTndx; /* GOT entry indx for PLT indirection */ 864 Word sa_linkndx; /* index of associated symbol from */ 865 /* ET_DYN file */ 866 Half sa_symspec; /* special symbol ids */ 867 Half sa_overndx; /* output file versioning index */ 868 Half sa_dverndx; /* dependency versioning index */ 869 }; 870 871 /* 872 * Nodes used to track symbols in the global AVL symbol dictionary. 873 */ 874 struct sym_avlnode { 875 avl_node_t sav_node; /* AVL node */ 876 Word sav_hash; /* symbol hash value */ 877 const char *sav_name; /* symbol name */ 878 Sym_desc *sav_sdp; /* symbol descriptor */ 879 }; 880 881 /* 882 * These are the ids for processing of `Special symbols'. They are used 883 * to set the sym->sd_aux->sa_symspec field. 884 */ 885 #define SDAUX_ID_ETEXT 1 /* etext && _etext symbol */ 886 #define SDAUX_ID_EDATA 2 /* edata && _edata symbol */ 887 #define SDAUX_ID_END 3 /* end, _end, && _END_ symbol */ 888 #define SDAUX_ID_DYN 4 /* DYNAMIC && _DYNAMIC symbol */ 889 #define SDAUX_ID_PLT 5 /* _PROCEDURE_LINKAGE_TABLE_ symbol */ 890 #define SDAUX_ID_GOT 6 /* _GLOBAL_OFFSET_TABLE_ symbol */ 891 #define SDAUX_ID_START 7 /* START_ && _START_ symbol */ 892 893 /* 894 * Flags for sym_desc.sd_flags 895 */ 896 #define FLG_SY_MVTOCOMM 0x00000001 /* assign symbol to common (.bss) */ 897 /* this is a result of a */ 898 /* copy reloc against sym */ 899 #define FLG_SY_GLOBREF 0x00000002 /* a global reference has been seen */ 900 #define FLG_SY_WEAKDEF 0x00000004 /* a weak definition has been used */ 901 #define FLG_SY_CLEAN 0x00000008 /* `Sym' entry points to original */ 902 /* input file (read-only). */ 903 #define FLG_SY_UPREQD 0x00000010 /* symbol value update is required, */ 904 /* either it's used as an entry */ 905 /* point or for relocation, but */ 906 /* it must be updated even if */ 907 /* the -s flag is in effect */ 908 #define FLG_SY_NOTAVAIL 0x00000020 /* symbol is not available to the */ 909 /* application either because it */ 910 /* originates from an implicitly */ 911 /* referenced shared object, or */ 912 /* because it is not part of a */ 913 /* specified version. */ 914 #define FLG_SY_REDUCED 0x00000040 /* a global is reduced to local */ 915 #define FLG_SY_VERSPROM 0x00000080 /* version definition has been */ 916 /* promoted to output file */ 917 #define FLG_SY_PROT 0x00000100 /* stv_protected visibility seen */ 918 919 #define FLG_SY_MAPREF 0x00000200 /* symbol reference generated by user */ 920 /* from mapfile */ 921 #define FLG_SY_REFRSD 0x00000400 /* symbols sd_ref has been raised */ 922 /* due to a copy-relocs */ 923 /* weak-strong pairing */ 924 #define FLG_SY_INTPOSE 0x00000800 /* symbol defines an interposer */ 925 #define FLG_SY_INVALID 0x00001000 /* unwanted/erroneous symbol */ 926 #define FLG_SY_SMGOT 0x00002000 /* small got index assigned to symbol */ 927 /* sparc only */ 928 #define FLG_SY_PARENT 0x00004000 /* symbol to be found in parent */ 929 /* only used with direct bindings */ 930 #define FLG_SY_LAZYLD 0x00008000 /* symbol to cause lazyloading of */ 931 /* parent object */ 932 #define FLG_SY_ISDISC 0x00010000 /* symbol is a member of a DISCARDED */ 933 /* section (COMDAT) */ 934 #define FLG_SY_PAREXPN 0x00020000 /* partially init. symbol to be */ 935 /* expanded */ 936 #define FLG_SY_PLTPAD 0x00040000 /* pltpadding has been allocated for */ 937 /* this symbol */ 938 #define FLG_SY_REGSYM 0x00080000 /* REGISTER symbol (sparc only) */ 939 #define FLG_SY_SOFOUND 0x00100000 /* compared against an SO definition */ 940 #define FLG_SY_EXTERN 0x00200000 /* symbol is external, allows -zdefs */ 941 /* error suppression */ 942 #define FLG_SY_MAPUSED 0x00400000 /* mapfile symbol used (occurred */ 943 /* within a relocatable object) */ 944 #define FLG_SY_COMMEXP 0x00800000 /* COMMON symbol which has been */ 945 /* allocated */ 946 #define FLG_SY_CMDREF 0x01000000 /* symbol was referenced from the */ 947 /* command line. (ld -u <>, */ 948 /* ld -zrtldinfo=<>, ...) */ 949 #define FLG_SY_SPECSEC 0x02000000 /* section index is reserved value */ 950 /* ABS, COMMON, ... */ 951 #define FLG_SY_TENTSYM 0x04000000 /* tentative symbol */ 952 #define FLG_SY_VISIBLE 0x08000000 /* symbols visibility determined */ 953 #define FLG_SY_STDFLTR 0x10000000 /* symbol is a standard filter */ 954 #define FLG_SY_AUXFLTR 0x20000000 /* symbol is an auxiliary filter */ 955 #define FLG_SY_DYNSORT 0x40000000 /* req. in dyn[sym|tls]sort section */ 956 #define FLG_SY_NODYNSORT 0x80000000 /* excluded from dyn[sym_tls]sort sec */ 957 958 #define FLG_SY_DEFAULT 0x0000100000000 /* global symbol, default */ 959 #define FLG_SY_SINGLE 0x0000200000000 /* global symbol, singleton defined */ 960 #define FLG_SY_PROTECT 0x0000400000000 /* global symbol, protected defined */ 961 #define FLG_SY_EXPORT 0x0000800000000 /* global symbol, exported defined */ 962 963 #define MSK_SY_GLOBAL \ 964 (FLG_SY_DEFAULT | FLG_SY_SINGLE | FLG_SY_PROTECT | FLG_SY_EXPORT) 965 /* this mask indicates that the */ 966 /* symbol has been explicitly */ 967 /* defined within a mapfile */ 968 /* definition, and is a candidate */ 969 /* for versioning */ 970 971 #define FLG_SY_HIDDEN 0x0001000000000 /* global symbol, reduce to local */ 972 #define FLG_SY_ELIM 0x0002000000000 /* global symbol, eliminate */ 973 #define FLG_SY_IGNORE 0x0004000000000 /* global symbol, ignored */ 974 975 #define MSK_SY_LOCAL (FLG_SY_HIDDEN | FLG_SY_ELIM | FLG_SY_IGNORE) 976 /* this mask allows all local state */ 977 /* flags to be removed when the */ 978 /* symbol is copy relocated */ 979 980 #define FLG_SY_EXPDEF 0x0008000000000 /* symbol visibility defined */ 981 /* explicitly */ 982 983 #define MSK_SY_NOAUTO (FLG_SY_SINGLE | FLG_SY_EXPORT | FLG_SY_EXPDEF) 984 /* this mask indicates that the */ 985 /* symbol is not a candidate for */ 986 /* auto-reduction/elimination */ 987 988 #define FLG_SY_MAPFILE 0x0010000000000 /* symbol attribute defined in a */ 989 /* mapfile */ 990 #define FLG_SY_DIR 0x0020000000000 /* global symbol, direct bindings */ 991 #define FLG_SY_NDIR 0x0040000000000 /* global symbol, nondirect bindings */ 992 #define FLG_SY_OVERLAP 0x0080000000000 /* move entry overlap detected */ 993 994 /* 995 * Create a mask for (sym.st_other & visibility) since the gABI does not yet 996 * define a ELF*_ST_OTHER macro. 997 */ 998 #define MSK_SYM_VISIBILITY 0x7 999 1000 /* 1001 * Structure to manage the shared object definition lists. There are two lists 1002 * that use this structure: 1003 * 1004 * - ofl_soneed; maintain the list of implicitly required dependencies 1005 * (ie. shared objects needed by other shared objects). These definitions 1006 * may include RPATH's required to locate the dependencies, and any 1007 * version requirements. 1008 * 1009 * - ofl_socntl; maintains the shared object control definitions. These are 1010 * provided by the user (via a mapfile) and are used to indicate any 1011 * version control requirements. 1012 */ 1013 struct sdf_desc { 1014 const char *sdf_name; /* the shared objects file name */ 1015 char *sdf_rpath; /* library search path DT_RPATH */ 1016 const char *sdf_rfile; /* referencing file for diagnostics */ 1017 Ifl_desc *sdf_file; /* the final input file descriptor */ 1018 Alist *sdf_vers; /* list of versions that are required */ 1019 /* from this object */ 1020 Alist *sdf_verneed; /* list of VERNEEDS to create for */ 1021 /* object via mapfile ADDVERS */ 1022 Word sdf_flags; 1023 }; 1024 1025 #define FLG_SDF_SELECT 0x01 /* version control selection required */ 1026 #define FLG_SDF_VERIFY 0x02 /* version definition verification */ 1027 /* required */ 1028 #define FLG_SDF_ADDVER 0x04 /* add VERNEED references */ 1029 1030 /* 1031 * Structure to manage shared object version usage requirements. 1032 */ 1033 struct sdv_desc { 1034 const char *sdv_name; /* version name */ 1035 const char *sdv_ref; /* versions reference */ 1036 Word sdv_flags; /* flags */ 1037 }; 1038 1039 #define FLG_SDV_MATCHED 0x01 /* VERDEF found and matched */ 1040 1041 /* 1042 * Structures to manage versioning information. Two versioning structures are 1043 * defined: 1044 * 1045 * - a version descriptor maintains a linked list of versions and their 1046 * associated dependencies. This is used to build the version definitions 1047 * for an image being created (see map_symbol), and to determine the 1048 * version dependency graph for any input files that are versioned. 1049 * 1050 * - a version index array contains each version of an input file that is 1051 * being processed. It informs us which versions are available for 1052 * binding, and is used to generate any version dependency information. 1053 */ 1054 struct ver_desc { 1055 const char *vd_name; /* version name */ 1056 Ifl_desc *vd_file; /* file that defined version */ 1057 Word vd_hash; /* hash value of name */ 1058 Half vd_ndx; /* coordinates with symbol index */ 1059 Half vd_flags; /* version information */ 1060 APlist *vd_deps; /* version dependencies */ 1061 Ver_desc *vd_ref; /* dependency's first reference */ 1062 }; 1063 1064 struct ver_index { 1065 const char *vi_name; /* dependency version name */ 1066 Half vi_flags; /* communicates availability */ 1067 Half vi_overndx; /* Index asssigned to this version in */ 1068 /* output object Verneed section */ 1069 Ver_desc *vi_desc; /* cross reference to descriptor */ 1070 }; 1071 1072 /* 1073 * Define any internal version descriptor flags ([vd|vi]_flags). Note that the 1074 * first byte is reserved for user visible flags (refer VER_FLG's in link.h). 1075 */ 1076 #define MSK_VER_USER 0x0f /* mask for user visible flags */ 1077 1078 #define FLG_VER_AVAIL 0x10 /* version is available for binding */ 1079 #define FLG_VER_REFER 0x20 /* version has been referenced */ 1080 #define FLG_VER_CYCLIC 0x40 /* a member of cyclic dependency */ 1081 1082 /* 1083 * isalist(1) descriptor - used to break an isalist string into its component 1084 * options. 1085 */ 1086 struct isa_opt { 1087 char *isa_name; /* individual isa option name */ 1088 size_t isa_namesz; /* and associated size */ 1089 }; 1090 1091 struct isa_desc { 1092 char *isa_list; /* sysinfo(SI_ISALIST) list */ 1093 size_t isa_listsz; /* and associated size */ 1094 Isa_opt *isa_opt; /* table of individual isa options */ 1095 size_t isa_optno; /* and associated number */ 1096 }; 1097 1098 /* 1099 * uname(2) descriptor - used to break a utsname structure into its component 1100 * options (at least those that we're interested in). 1101 */ 1102 struct uts_desc { 1103 char *uts_osname; /* operating system name */ 1104 size_t uts_osnamesz; /* and associated size */ 1105 char *uts_osrel; /* operating system release */ 1106 size_t uts_osrelsz; /* and associated size */ 1107 }; 1108 1109 /* 1110 * SHT_GROUP descriptor - used to track group sections at the global 1111 * level to resolve conflicts and determine which to keep. 1112 */ 1113 struct group_desc { 1114 Is_desc *gd_isc; /* input section descriptor */ 1115 Is_desc *gd_oisc; /* overriding input section */ 1116 /* descriptor when discarded */ 1117 const char *gd_name; /* group name (signature symbol) */ 1118 Word *gd_data; /* data for group section */ 1119 size_t gd_cnt; /* number of entries in group data */ 1120 }; 1121 1122 /* 1123 * Indexes into the ld_support_funcs[] table. 1124 */ 1125 typedef enum { 1126 LDS_VERSION = 0, /* Must be first and have value 0 */ 1127 LDS_INPUT_DONE, 1128 LDS_START, 1129 LDS_ATEXIT, 1130 LDS_OPEN, 1131 LDS_FILE, 1132 LDS_INSEC, 1133 LDS_SEC, 1134 LDS_NUM 1135 } Support_ndx; 1136 1137 /* 1138 * Structure to manage archive member caching. Each archive has an archive 1139 * descriptor (Ar_desc) associated with it. This contains pointers to the 1140 * archive symbol table (obtained by elf_getarsyms(3e)) and an auxiliary 1141 * structure (Ar_uax[]) that parallels this symbol table. The member element 1142 * of this auxiliary table indicates whether the archive member associated with 1143 * the symbol offset has already been extracted (AREXTRACTED) or partially 1144 * processed (refer process_member()). 1145 */ 1146 typedef struct ar_mem { 1147 Elf *am_elf; /* elf descriptor for this member */ 1148 char *am_name; /* members name */ 1149 char *am_path; /* path (ie. lib(foo.o)) */ 1150 Sym *am_syms; /* start of global symbols */ 1151 char *am_strs; /* associated string table start */ 1152 Xword am_symn; /* no. of global symbols */ 1153 } Ar_mem; 1154 1155 typedef struct ar_aux { 1156 Sym_desc *au_syms; /* internal symbol descriptor */ 1157 Ar_mem *au_mem; /* associated member */ 1158 } Ar_aux; 1159 1160 #define FLG_ARMEM_PROC (Ar_mem *)-1 1161 1162 typedef struct ar_desc { 1163 const char *ad_name; /* archive file name */ 1164 Elf *ad_elf; /* elf descriptor for the archive */ 1165 Elf_Arsym *ad_start; /* archive symbol table start */ 1166 Ar_aux *ad_aux; /* auxiliary symbol information */ 1167 dev_t ad_stdev; /* device id and inode number for */ 1168 ino_t ad_stino; /* multiple inclusion checks */ 1169 ofl_flag_t ad_flags; /* archive specific cmd line flags */ 1170 } Ar_desc; 1171 1172 /* 1173 * Define any archive descriptor flags. NOTE, make sure they do not clash with 1174 * any output file descriptor archive extraction flags, as these are saved in 1175 * the same entry (see MSK_OF1_ARCHIVE). 1176 */ 1177 #define FLG_ARD_EXTRACT 0x00010000 /* archive member has been extracted */ 1178 1179 /* 1180 * Function Declarations. 1181 */ 1182 #if defined(_ELF64) 1183 1184 #define ld_create_outfile ld64_create_outfile 1185 #define ld_ent_setup ld64_ent_setup 1186 #define ld_init_strings ld64_init_strings 1187 #define ld_init_target ld64_init_target 1188 #define ld_make_sections ld64_make_sections 1189 #define ld_main ld64_main 1190 #define ld_ofl_cleanup ld64_ofl_cleanup 1191 #define ld_process_mem ld64_process_mem 1192 #define ld_reloc_init ld64_reloc_init 1193 #define ld_reloc_process ld64_reloc_process 1194 #define ld_sym_validate ld64_sym_validate 1195 #define ld_update_outfile ld64_update_outfile 1196 1197 #else 1198 1199 #define ld_create_outfile ld32_create_outfile 1200 #define ld_ent_setup ld32_ent_setup 1201 #define ld_init_strings ld32_init_strings 1202 #define ld_init_target ld32_init_target 1203 #define ld_make_sections ld32_make_sections 1204 #define ld_main ld32_main 1205 #define ld_ofl_cleanup ld32_ofl_cleanup 1206 #define ld_process_mem ld32_process_mem 1207 #define ld_reloc_init ld32_reloc_init 1208 #define ld_reloc_process ld32_reloc_process 1209 #define ld_sym_validate ld32_sym_validate 1210 #define ld_update_outfile ld32_update_outfile 1211 1212 #endif 1213 1214 extern int ld_getopt(Lm_list *, int, int, char **); 1215 1216 extern int ld32_main(int, char **, Half); 1217 extern int ld64_main(int, char **, Half); 1218 1219 extern uintptr_t ld_create_outfile(Ofl_desc *); 1220 extern uintptr_t ld_ent_setup(Ofl_desc *, Xword); 1221 extern uintptr_t ld_init_strings(Ofl_desc *); 1222 extern int ld_init_target(Lm_list *, Half mach); 1223 extern uintptr_t ld_make_sections(Ofl_desc *); 1224 extern void ld_ofl_cleanup(Ofl_desc *); 1225 extern Ifl_desc *ld_process_mem(const char *, const char *, char *, 1226 size_t, Ofl_desc *, Rej_desc *); 1227 extern uintptr_t ld_reloc_init(Ofl_desc *); 1228 extern uintptr_t ld_reloc_process(Ofl_desc *); 1229 extern uintptr_t ld_sym_validate(Ofl_desc *); 1230 extern uintptr_t ld_update_outfile(Ofl_desc *); 1231 1232 #ifdef __cplusplus 1233 } 1234 #endif 1235 1236 #endif /* _LIBLD_H */ 1237
Indexes created Sat Nov 21 08:48:25 UTC 2009
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