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 * Output file processing structure 154 */ 155 typedef Lword ofl_flag_t; 156 struct ofl_desc { 157 char *ofl_sgsid; /* link-editor identification */ 158 const char *ofl_name; /* full file name */ 159 Elf *ofl_elf; /* elf_memory() elf descriptor */ 160 Elf *ofl_welf; /* ELF_C_WRITE elf descriptor */ 161 Ehdr *ofl_dehdr; /* default elf header, and new elf */ 162 Ehdr *ofl_nehdr; /* header describing this file */ 163 Phdr *ofl_phdr; /* program header descriptor */ 164 Phdr *ofl_tlsphdr; /* TLS phdr */ 165 int ofl_fd; /* file descriptor */ 166 size_t ofl_size; /* image size */ 167 APlist *ofl_maps; /* list of input mapfiles */ 168 APlist *ofl_segs; /* list of segments */ 169 Alist *ofl_ents; /* list of entrance descriptors */ 170 APlist *ofl_objs; /* relocatable object file list */ 171 Word ofl_objscnt; /* and count */ 172 APlist *ofl_ars; /* archive library list */ 173 Word ofl_arscnt; /* and count */ 174 int ofl_ars_gsandx; /* archive group argv index. 0 means */ 175 /* no current group, < 0 means */ 176 /* error reported. >0 is cur ndx */ 177 Word ofl_ars_gsndx; /* current -zrescan-start ofl_ars ndx */ 178 APlist *ofl_sos; /* shared object list */ 179 Word ofl_soscnt; /* and count */ 180 APlist *ofl_soneed; /* list of implicitly required .so's */ 181 APlist *ofl_socntl; /* list of .so control definitions */ 182 APlist *ofl_outrels; /* list of output relocations */ 183 Word ofl_outrelscnt; /* and count */ 184 APlist *ofl_actrels; /* list of relocations to perform */ 185 Word ofl_actrelscnt; /* and count */ 186 Word ofl_entrelscnt; /* no of relocations entered */ 187 Alist *ofl_copyrels; /* list of copy relocations */ 188 APlist *ofl_ordered; /* list of shf_ordered sections */ 189 APlist *ofl_syminfsyms; /* list of interesting syms */ 190 /* for syminfo processing */ 191 APlist *ofl_ismove; /* list of .SUNW_move sections */ 192 APlist *ofl_ismoverel; /* list of relocation input section */ 193 /* targeting to expanded area */ 194 APlist *ofl_parsyms; /* list of partially initialized */ 195 /* symbols (ie. move symbols) */ 196 APlist *ofl_extrarels; /* relocation sections which have */ 197 /* a NULL sh_info */ 198 avl_tree_t *ofl_groups; /* pointer to head of Groups AVL tree */ 199 APlist *ofl_initarray; /* list of init array func names */ 200 APlist *ofl_finiarray; /* list of fini array func names */ 201 APlist *ofl_preiarray; /* list of preinit array func names */ 202 APlist *ofl_rtldinfo; /* list of rtldinfo syms */ 203 APlist *ofl_osgroups; /* list of output GROUP sections */ 204 APlist *ofl_ostlsseg; /* pointer to sections in TLS segment */ 205 APlist *ofl_unwind; /* list of unwind output sections */ 206 Os_desc *ofl_unwindhdr; /* Unwind hdr */ 207 avl_tree_t ofl_symavl; /* pointer to head of Syms AVL tree */ 208 Sym_desc **ofl_regsyms; /* array of potential register */ 209 Word ofl_regsymsno; /* symbols and array count */ 210 Word ofl_regsymcnt; /* no. of output register symbols */ 211 Word ofl_lregsymcnt; /* no. of local register symbols */ 212 Sym_desc *ofl_dtracesym; /* ld -zdtrace= */ 213 ofl_flag_t ofl_flags; /* various state bits, args etc. */ 214 ofl_flag_t ofl_flags1; /* more flags */ 215 void *ofl_entry; /* entry point (-e and Sym_desc *) */ 216 char *ofl_filtees; /* shared objects we are a filter for */ 217 const char *ofl_soname; /* (-h option) output file name for */ 218 /* dynamic structure */ 219 const char *ofl_interp; /* interpreter name used by exec() */ 220 char *ofl_rpath; /* run path to store in .dynamic */ 221 char *ofl_config; /* config path to store in .dynamic */ 222 APlist *ofl_ulibdirs; /* user supplied library search list */ 223 APlist *ofl_dlibdirs; /* default library search list */ 224 Word ofl_vercnt; /* number of versions to generate */ 225 APlist *ofl_verdesc; /* list of version descriptors */ 226 size_t ofl_verdefsz; /* size of version definition section */ 227 size_t ofl_verneedsz; /* size of version needed section */ 228 Word ofl_entercnt; /* no. of global symbols entered */ 229 Word ofl_globcnt; /* no. of global symbols to output */ 230 Word ofl_scopecnt; /* no. of scoped symbols to output */ 231 Word ofl_dynscopecnt; /* no. scoped syms in .SUNW_ldynsym */ 232 Word ofl_elimcnt; /* no. of eliminated symbols */ 233 Word ofl_locscnt; /* no. of local symbols in .symtab */ 234 Word ofl_dynlocscnt; /* no. local symbols in .SUNW_ldynsym */ 235 Word ofl_dynsymsortcnt; /* no. ndx in .SUNW_dynsymsort */ 236 Word ofl_dyntlssortcnt; /* no. ndx in .SUNW_dyntlssort */ 237 Word ofl_dynshdrcnt; /* no. of output section in .dynsym */ 238 Word ofl_shdrcnt; /* no. of output sections */ 239 Str_tbl *ofl_shdrsttab; /* Str_tbl for shdr strtab */ 240 Str_tbl *ofl_strtab; /* Str_tbl for symtab strtab */ 241 Str_tbl *ofl_dynstrtab; /* Str_tbl for dymsym strtab */ 242 Gotndx *ofl_tlsldgotndx; /* index to LD TLS_index structure */ 243 Xword ofl_relocsz; /* size of output relocations */ 244 Xword ofl_relocgotsz; /* size of .got relocations */ 245 Xword ofl_relocpltsz; /* size of .plt relocations */ 246 Xword ofl_relocbsssz; /* size of .bss (copy) relocations */ 247 Xword ofl_relocrelsz; /* size of .rel[a] relocations */ 248 Word ofl_relocincnt; /* no. of input relocations */ 249 Word ofl_reloccnt; /* tot number of output relocations */ 250 Word ofl_reloccntsub; /* tot numb of output relocations to */ 251 /* skip (-zignore) */ 252 Word ofl_relocrelcnt; /* tot number of relative */ 253 /* relocations */ 254 Word ofl_gotcnt; /* no. of .got entries */ 255 Word ofl_pltcnt; /* no. of .plt entries */ 256 Word ofl_pltpad; /* no. of .plt padd entries */ 257 Word ofl_hashbkts; /* no. of hash buckets required */ 258 Is_desc *ofl_isbss; /* .bss input section (globals) */ 259 Is_desc *ofl_islbss; /* .lbss input section (globals) */ 260 Is_desc *ofl_istlsbss; /* .tlsbss input section (globals) */ 261 Is_desc *ofl_isparexpn; /* -z nopartial .data input section */ 262 Os_desc *ofl_osdynamic; /* .dynamic output section */ 263 Os_desc *ofl_osdynsym; /* .dynsym output section */ 264 Os_desc *ofl_osldynsym; /* .SUNW_ldynsym output section */ 265 Os_desc *ofl_osdynstr; /* .dynstr output section */ 266 Os_desc *ofl_osdynsymsort; /* .SUNW_dynsymsort output section */ 267 Os_desc *ofl_osdyntlssort; /* .SUNW_dyntlssort output section */ 268 Os_desc *ofl_osgot; /* .got output section */ 269 Os_desc *ofl_oshash; /* .hash output section */ 270 Os_desc *ofl_osinitarray; /* .initarray output section */ 271 Os_desc *ofl_osfiniarray; /* .finiarray output section */ 272 Os_desc *ofl_ospreinitarray; /* .preinitarray output section */ 273 Os_desc *ofl_osinterp; /* .interp output section */ 274 Os_desc *ofl_oscap; /* .SUNW_cap output section */ 275 Os_desc *ofl_osplt; /* .plt output section */ 276 Os_desc *ofl_osmove; /* .SUNW_move output section */ 277 Os_desc *ofl_osrelhead; /* first relocation section */ 278 Os_desc *ofl_osrel; /* .rel[a] relocation section */ 279 Os_desc *ofl_osshstrtab; /* .shstrtab output section */ 280 Os_desc *ofl_osstrtab; /* .strtab output section */ 281 Os_desc *ofl_ossymtab; /* .symtab output section */ 282 Os_desc *ofl_ossymshndx; /* .symtab_shndx output section */ 283 Os_desc *ofl_osdynshndx; /* .dynsym_shndx output section */ 284 Os_desc *ofl_osldynshndx; /* .SUNW_ldynsym_shndx output sec */ 285 Os_desc *ofl_osverdef; /* .version definition output section */ 286 Os_desc *ofl_osverneed; /* .version needed output section */ 287 Os_desc *ofl_osversym; /* .version symbol ndx output section */ 288 Word ofl_dtflags_1; /* DT_FLAGS_1 entries */ 289 Word ofl_dtflags; /* DT_FLAGS entries */ 290 Os_desc *ofl_ossyminfo; /* .SUNW_syminfo output section */ 291 Half ofl_parexpnndx; /* -z nopartial section index */ 292 /* Ref. at perform_outreloc() in */ 293 /* libld/{mach}/machrel.c */ 294 Xword *ofl_checksum; /* DT_CHECKSUM value address */ 295 char *ofl_depaudit; /* dependency auditing required (-P) */ 296 char *ofl_audit; /* object auditing required (-p) */ 297 Alist *ofl_symfltrs; /* per-symbol filtees and their */ 298 Alist *ofl_dtsfltrs; /* associated .dynamic/.dynstrs */ 299 Xword ofl_hwcap_1; /* hardware capabilities */ 300 Xword ofl_sfcap_1; /* software capabilities */ 301 Lm_list *ofl_lml; /* runtime link-map list */ 302 Gottable *ofl_gottable; /* debugging got information */ 303 Rlxrel_cache ofl_sr_cache; /* Cache last result from */ 304 /* sloppy_comdat_reloc() */ 305 APlist *ofl_maptext; /* mapfile added text sections */ 306 APlist *ofl_mapdata; /* mapfile added data sections */ 307 }; 308 309 #define FLG_OF_DYNAMIC 0x00000001 /* generate dynamic output module */ 310 #define FLG_OF_STATIC 0x00000002 /* generate static output module */ 311 #define FLG_OF_EXEC 0x00000004 /* generate an executable */ 312 #define FLG_OF_RELOBJ 0x00000008 /* generate a relocatable object */ 313 #define FLG_OF_SHAROBJ 0x00000010 /* generate a shared object */ 314 #define FLG_OF_BFLAG 0x00000020 /* do no special plt building: -b */ 315 #define FLG_OF_IGNENV 0x00000040 /* ignore LD_LIBRARY_PATH: -i */ 316 #define FLG_OF_STRIP 0x00000080 /* strip output: -s */ 317 #define FLG_OF_NOWARN 0x00000100 /* disable symbol warnings: -t */ 318 #define FLG_OF_NOUNDEF 0x00000200 /* allow no undefined symbols: -zdefs */ 319 #define FLG_OF_PURETXT 0x00000400 /* allow no text relocations: -ztext */ 320 #define FLG_OF_GENMAP 0x00000800 /* generate a memory map: -m */ 321 #define FLG_OF_DYNLIBS 0x00001000 /* dynamic input allowed: -Bdynamic */ 322 #define FLG_OF_SYMBOLIC 0x00002000 /* bind global symbols: -Bsymbolic */ 323 #define FLG_OF_ADDVERS 0x00004000 /* add version stamp: -Qy */ 324 #define FLG_OF_NOLDYNSYM 0x00008000 /* -znoldynsym set */ 325 #define FLG_OF_SEGORDER 0x00010000 /* segment ordering is required */ 326 #define FLG_OF_SEGSORT 0x00020000 /* segment sorting is required */ 327 #define FLG_OF_TEXTREL 0x00040000 /* text relocations have been found */ 328 #define FLG_OF_MULDEFS 0x00080000 /* multiple symbols are allowed */ 329 #define FLG_OF_TLSPHDR 0x00100000 /* a TLS program header is required */ 330 #define FLG_OF_BLDGOT 0x00200000 /* build GOT table */ 331 #define FLG_OF_VERDEF 0x00400000 /* record version definitions */ 332 #define FLG_OF_VERNEED 0x00800000 /* record version dependencies */ 333 #define FLG_OF_NOVERSEC 0x01000000 /* don't record version sections */ 334 #define FLG_OF_KEY 0x02000000 /* file requires sort keys */ 335 #define FLG_OF_PROCRED 0x04000000 /* process any symbol reductions by */ 336 /* effecting the symbol table */ 337 /* output and relocations */ 338 #define FLG_OF_SYMINFO 0x08000000 /* create a syminfo section */ 339 #define FLG_OF_AUX 0x10000000 /* ofl_filter is an auxiliary filter */ 340 #define FLG_OF_FATAL 0x20000000 /* fatal error during input */ 341 #define FLG_OF_WARN 0x40000000 /* warning during input processing. */ 342 #define FLG_OF_VERBOSE 0x80000000 /* -z verbose flag set */ 343 344 #define FLG_OF_MAPSYMB 0x000100000000 /* symbolic scope definition seen */ 345 #define FLG_OF_MAPGLOB 0x000200000000 /* global scope definition seen */ 346 #define FLG_OF_COMREL 0x000400000000 /* -z combreloc set, which enables */ 347 /* DT_RELACNT tracking, */ 348 #define FLG_OF_NOCOMREL 0x000800000000 /* -z nocombreloc set */ 349 #define FLG_OF_AUTOLCL 0x001000000000 /* automatically reduce unspecified */ 350 /* global symbols to locals */ 351 #define FLG_OF_AUTOELM 0x002000000000 /* automatically eliminate */ 352 /* unspecified global symbols */ 353 #define FLG_OF_REDLSYM 0x004000000000 /* reduce local symbols */ 354 #define FLG_OF_SECORDER 0x008000000000 /* section ordering is required */ 355 #define FLG_OF_OSABI 0x010000000000 /* Tag object as ELFOSABI_SOLARIS */ 356 357 /* 358 * In the flags1 arena, establish any options that are applicable to archive 359 * extraction first, and associate a mask. These values are recorded with any 360 * archive descriptor so that they may be reset should the archive require a 361 * rescan to try and resolve undefined symbols. 362 */ 363 #define FLG_OF1_ALLEXRT 0x00000001 /* extract all members from an */ 364 /* archive file */ 365 #define FLG_OF1_WEAKEXT 0x00000002 /* allow archive extraction to */ 366 /* resolve weak references */ 367 #define MSK_OF1_ARCHIVE 0x00000003 /* archive flags mask */ 368 369 #define FLG_OF1_NOINTRP 0x00000008 /* -z nointerp flag set */ 370 #define FLG_OF1_ZDIRECT 0x00000010 /* -z direct flag set */ 371 #define FLG_OF1_NDIRECT 0x00000020 /* no-direct bindings specified */ 372 #define FLG_OF1_OVHWCAP 0x00000040 /* override any input hardware or */ 373 #define FLG_OF1_OVSFCAP 0x00000080 /* software capabilities */ 374 #define FLG_OF1_RELDYN 0x00000100 /* process .dynamic in rel obj */ 375 #define FLG_OF1_NRLXREL 0x00000200 /* -z norelaxreloc flag set */ 376 #define FLG_OF1_RLXREL 0x00000400 /* -z relaxreloc flag set */ 377 #define FLG_OF1_IGNORE 0x00000800 /* ignore unused dependencies */ 378 379 #define FLG_OF1_NOSGHND 0x00001000 /* -z nosighandler flag set */ 380 #define FLG_OF1_TEXTOFF 0x00002000 /* text relocations are ok */ 381 #define FLG_OF1_ABSEXEC 0x00004000 /* -zabsexec set */ 382 #define FLG_OF1_LAZYLD 0x00008000 /* lazy loading of objects enabled */ 383 #define FLG_OF1_GRPPRM 0x00010000 /* dependencies are to have */ 384 /* GROUPPERM enabled */ 385 #define FLG_OF1_OVRFLW 0x00020000 /* size exceeds 32-bit limitation */ 386 /* of 32-bit libld */ 387 #define FLG_OF1_NOPARTI 0x00040000 /* -znopartial set */ 388 #define FLG_OF1_BSSOREL 0x00080000 /* output relocation against bss */ 389 /* section */ 390 #define FLG_OF1_TLSOREL 0x00100000 /* output relocation against .tlsbss */ 391 /* section */ 392 #define FLG_OF1_MEMORY 0x00200000 /* produce a memory model */ 393 394 #define FLG_OF1_ENCDIFF 0x00800000 /* Host running linker has different */ 395 /* byte order than output object */ 396 #define FLG_OF1_VADDR 0x01000000 /* user segment defines a vaddr */ 397 #define FLG_OF1_EXTRACT 0x02000000 /* archive member has been extracted */ 398 #define FLG_OF1_RESCAN 0x04000000 /* any archives should be rescanned */ 399 #define FLG_OF1_IGNPRC 0x08000000 /* ignore processing required */ 400 #define FLG_OF1_NCSTTAB 0x10000000 /* -znocompstrtab set */ 401 #define FLG_OF1_DONE 0x20000000 /* link-editor processing complete */ 402 #define FLG_OF1_NONREG 0x40000000 /* non-regular file specified as */ 403 /* the output file */ 404 #define FLG_OF1_ALNODIR 0x80000000 /* establish NODIRECT for all */ 405 /* exported interfaces. */ 406 407 /* 408 * Test to see if the output file would allow the presence of 409 * a .dynsym section. 410 */ 411 #define OFL_ALLOW_DYNSYM(_ofl) (((_ofl)->ofl_flags & \ 412 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == FLG_OF_DYNAMIC) 413 414 /* 415 * Test to see if the output file would allow the presence of 416 * a .SUNW_ldynsym section. The requirements are that a .dynsym 417 * is allowed, and -znoldynsym has not been specified. Note that 418 * even if the answer is True (1), we will only generate one if there 419 * are local symbols that require it. 420 */ 421 #define OFL_ALLOW_LDYNSYM(_ofl) (((_ofl)->ofl_flags & \ 422 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ | FLG_OF_NOLDYNSYM)) == FLG_OF_DYNAMIC) 423 424 /* 425 * Test to see if relocation processing should be done. This is normally 426 * true, but can be disabled via the '-z noreloc' option. Note that 427 * relocatable objects are still relocated even if '-z noreloc' is present. 428 */ 429 #define OFL_DO_RELOC(_ofl) (((_ofl)->ofl_flags & FLG_OF_RELOBJ) || \ 430 !((_ofl)->ofl_dtflags_1 & DF_1_NORELOC)) 431 432 /* 433 * Define a move descriptor used within relocation structures. 434 */ 435 typedef struct { 436 Move *mr_move; 437 Sym_desc *mr_sym; 438 } Mv_reloc; 439 440 /* 441 * Relocation (active & output) processing structure - transparent to common 442 * code. 443 * 444 * Note that rel_raddend is primarily only of interest to RELA relocations, 445 * and is set to 0 for REL. However, there is an exception: If FLG_REL_NADDEND 446 * is set, then rel_raddend contains a replacement value for the implicit 447 * addend found in the relocation target. 448 */ 449 struct rel_desc { 450 Os_desc *rel_osdesc; /* output section reloc is against */ 451 Is_desc *rel_isdesc; /* input section reloc is against */ 452 const char *rel_sname; /* symbol name (may be "unknown") */ 453 Sym_desc *rel_sym; /* sym relocation is against */ 454 Sym_desc *rel_usym; /* strong sym if this is a weak pair */ 455 Mv_reloc *rel_move; /* move table information */ 456 Word rel_flags; /* misc. flags for relocations */ 457 Word rel_rtype; /* relocation type */ 458 Xword rel_roffset; /* relocation offset */ 459 Sxword rel_raddend; /* addend from input relocation */ 460 Word rel_typedata; /* ELF_R_TYPE_DATA(info) */ 461 }; 462 463 /* 464 * common flags used on the Rel_desc structure (defined in machrel.h). 465 */ 466 #define FLG_REL_GOT 0x00000001 /* relocation against GOT */ 467 #define FLG_REL_PLT 0x00000002 /* relocation against PLT */ 468 #define FLG_REL_BSS 0x00000004 /* relocation against BSS */ 469 #define FLG_REL_LOAD 0x00000008 /* section loadable */ 470 #define FLG_REL_SCNNDX 0x00000010 /* use section index for symbol ndx */ 471 #define FLG_REL_CLVAL 0x00000020 /* clear VALUE for active relocation */ 472 #define FLG_REL_ADVAL 0x00000040 /* add VALUE for output relocation, */ 473 /* only relevant to SPARC and */ 474 /* R_SPARC_RELATIVE */ 475 #define FLG_REL_GOTCL 0x00000080 /* clear the GOT entry. This is */ 476 /* relevant to RELA relocations, */ 477 /* not REL (i386) relocations */ 478 #define FLG_REL_MOVETAB 0x00000100 /* Relocation against .SUNW_move */ 479 /* adjustments required before */ 480 /* actual relocation */ 481 #define FLG_REL_NOINFO 0x00000200 /* Relocation comes from a section */ 482 /* with a null sh_info field */ 483 #define FLG_REL_REG 0x00000400 /* Relocation target is reg sym */ 484 #define FLG_REL_FPTR 0x00000800 /* relocation against func. desc. */ 485 #define FLG_REL_RFPTR1 0x00001000 /* Relative relocation against */ 486 /* 1st part of FD */ 487 #define FLG_REL_RFPTR2 0x00002000 /* Relative relocation against */ 488 /* 2nd part of FD */ 489 #define FLG_REL_DISP 0x00004000 /* *disp* relocation */ 490 #define FLG_REL_STLS 0x00008000 /* IE TLS reference to */ 491 /* static TLS GOT index */ 492 #define FLG_REL_DTLS 0x00010000 /* GD TLS reference relative to */ 493 /* dynamic TLS GOT index */ 494 #define FLG_REL_MTLS 0x00020000 /* LD TLS reference against GOT */ 495 #define FLG_REL_STTLS 0x00040000 /* LE TLS reference directly */ 496 /* to static tls index */ 497 #define FLG_REL_TLSFIX 0x00080000 /* relocation points to TLS instr. */ 498 /* which needs updating */ 499 #define FLG_REL_RELA 0x00100000 /* descriptor captures a Rela */ 500 #define FLG_REL_GOTFIX 0x00200000 /* relocation points to GOTOP instr. */ 501 /* which needs updating */ 502 #define FLG_REL_NADDEND 0x00400000 /* Replace implicit addend in dest */ 503 /* with value in rel_raddend */ 504 /* Relevant to REL (i386) */ 505 /* relocations, not to RELA. */ 506 507 /* 508 * Structure to hold a cache of Relocations. 509 */ 510 struct rel_cache { 511 Rel_desc *rc_end; 512 Rel_desc *rc_free; 513 }; 514 515 /* 516 * Symbol value descriptor. For relocatable objects, each symbols value is 517 * its offset within its associated section. Therefore, to uniquely define 518 * each symbol within a reloctable object, record and sort the sh_offset and 519 * symbol value. This information is used to seach for displacement 520 * relocations as part of copy relocation validation. 521 */ 522 typedef struct { 523 Addr ssv_value; 524 Sym_desc *ssv_sdp; 525 } Ssv_desc; 526 527 /* 528 * Input file processing structures. 529 */ 530 struct ifl_desc { /* input file descriptor */ 531 const char *ifl_name; /* full file name */ 532 const char *ifl_soname; /* shared object name */ 533 dev_t ifl_stdev; /* device id and inode number for .so */ 534 ino_t ifl_stino; /* multiple inclusion checks */ 535 Ehdr *ifl_ehdr; /* elf header describing this file */ 536 Elf *ifl_elf; /* elf descriptor for this file */ 537 Sym_desc **ifl_oldndx; /* original symbol table indices */ 538 Sym_desc *ifl_locs; /* symbol desc version of locals */ 539 Ssv_desc *ifl_sortsyms; /* sorted list of symbols by value */ 540 Word ifl_locscnt; /* no. of local symbols to process */ 541 Word ifl_symscnt; /* total no. of symbols to process */ 542 Word ifl_sortcnt; /* no. of sorted symbols to process */ 543 Word ifl_shnum; /* number of sections in file */ 544 Word ifl_shstrndx; /* index to .shstrtab */ 545 Word ifl_vercnt; /* number of versions in file */ 546 Half ifl_neededndx; /* index to NEEDED in .dyn section */ 547 Word ifl_flags; /* Explicit/implicit reference */ 548 Is_desc **ifl_isdesc; /* isdesc[scn ndx] = Is_desc ptr */ 549 Sdf_desc *ifl_sdfdesc; /* control definition */ 550 Versym *ifl_versym; /* version symbol table array */ 551 Ver_index *ifl_verndx; /* verndx[ver ndx] = Ver_index */ 552 APlist *ifl_verdesc; /* version descriptor list */ 553 APlist *ifl_relsect; /* relocation section list */ 554 Alist *ifl_groups; /* SHT_GROUP section list */ 555 }; 556 557 #define FLG_IF_CMDLINE 0x00000001 /* full filename specified from the */ 558 /* command line (no -l) */ 559 #define FLG_IF_NEEDED 0x00000002 /* shared object should be recorded */ 560 #define FLG_IF_DIRECT 0x00000004 /* establish direct bindings to this */ 561 /* object */ 562 #define FLG_IF_EXTRACT 0x00000008 /* file extracted from an archive */ 563 #define FLG_IF_VERNEED 0x00000010 /* version dependency information is */ 564 /* required */ 565 #define FLG_IF_DEPREQD 0x00000020 /* dependency is required to satisfy */ 566 /* symbol references */ 567 #define FLG_IF_NEEDSTR 0x00000040 /* dependency specified by -Nn */ 568 /* flag */ 569 #define FLG_IF_IGNORE 0x00000080 /* ignore unused dependencies */ 570 #define FLG_IF_NODIRECT 0x00000100 /* object contains symbols that */ 571 /* cannot be directly bound to. */ 572 #define FLG_IF_LAZYLD 0x00000200 /* bindings to this object should be */ 573 /* lazy loaded */ 574 #define FLG_IF_GRPPRM 0x00000400 /* this dependency should have the */ 575 /* DF_P1_GROUPPERM flag set */ 576 #define FLG_IF_DISPPEND 0x00000800 /* displacement relocation done */ 577 /* in the ld time. */ 578 #define FLG_IF_DISPDONE 0x00001000 /* displacement relocation done */ 579 /* at the run time */ 580 #define FLG_IF_MAPFILE 0x00002000 /* file is a mapfile */ 581 #define FLG_IF_HSTRTAB 0x00004000 /* file has a string section */ 582 #define FLG_IF_FILEREF 0x00008000 /* file contains a section which */ 583 /* is included in the output */ 584 /* allocatable image */ 585 #define FLG_IF_GNUVER 0x00010000 /* file used GNU-style versioning */ 586 #define FLG_IF_ORDERED 0x00020000 /* ordered section processing */ 587 /* required */ 588 589 struct is_desc { /* input section descriptor */ 590 const char *is_name; /* original section name */ 591 Shdr *is_shdr; /* the elf section header */ 592 Ifl_desc *is_file; /* infile desc for this section */ 593 Os_desc *is_osdesc; /* new output section for this */ 594 /* input section */ 595 Elf_Data *is_indata; /* input sections raw data */ 596 Is_desc *is_symshndx; /* related SHT_SYM_SHNDX section */ 597 Is_desc *is_comdatkeep; /* If COMDAT section is discarded, */ 598 /* this is section that was kept */ 599 Word is_scnndx; /* original section index in file */ 600 Word is_ordndx; /* Index for section. Used to decide */ 601 /* where to insert section when */ 602 /* reordering sections */ 603 Word is_keyident; /* key for SHF_{ORDERED|LINK_ORDER} */ 604 /* processing and ident used for */ 605 /* placing/ordering sections */ 606 Word is_flags; /* Various flags */ 607 }; 608 609 #define FLG_IS_ORDERED 0x0001 /* this is a SHF_ORDERED section */ 610 #define FLG_IS_KEY 0x0002 /* section requires sort keys */ 611 #define FLG_IS_DISCARD 0x0004 /* section is to be discarded */ 612 #define FLG_IS_RELUPD 0x0008 /* symbol defined here may have moved */ 613 #define FLG_IS_SECTREF 0x0010 /* section has been referenced */ 614 #define FLG_IS_GDATADEF 0x0020 /* section contains global data sym */ 615 #define FLG_IS_EXTERNAL 0x0040 /* isp from an user file */ 616 #define FLG_IS_INSTRMRG 0x0080 /* Usable SHF_MERGE|SHF_STRINGS sec */ 617 #define FLG_IS_GNSTRMRG 0x0100 /* Generated mergeable string section */ 618 #define FLG_IS_GROUPS 0x0200 /* section has groups to process */ 619 #define FLG_IS_PLACE 0x0400 /* section requires to be placed */ 620 #define FLG_IS_COMDAT 0x0800 /* section is COMDAT */ 621 #define FLG_IS_EHFRAME 0x1000 /* section is .eh_frame */ 622 623 /* 624 * Output sections contain lists of input sections that are assigned to them. 625 * These items fall into 4 categories: 626 * BEFORE - Ordered sections that specify SHN_BEFORE, in input order. 627 * ORDERED - Ordered sections that are sorted using unsorted sections 628 * as the sort key. 629 * DEFAULT - Sections that are placed into the output section 630 * in input order. 631 * AFTER - Ordered sections that specify SHN_AFTER, in input order. 632 */ 633 #define OS_ISD_BEFORE 0 634 #define OS_ISD_ORDERED 1 635 #define OS_ISD_DEFAULT 2 636 #define OS_ISD_AFTER 3 637 #define OS_ISD_NUM 4 638 typedef APlist *os_isdecs_arr[OS_ISD_NUM]; 639 640 /* 641 * Convenience macro for traversing every input section associated 642 * with a given output section. The primary benefit of this macro 643 * is that it preserves a precious level of code indentation in the 644 * code that uses it. 645 */ 646 #define OS_ISDESCS_TRAVERSE(_list_idx, _osp, _idx, _isp) \ 647 for (_list_idx = 0; _list_idx < OS_ISD_NUM; _list_idx++) \ 648 for (APLIST_TRAVERSE(_osp->os_isdescs[_list_idx], _idx, _isp)) 649 650 651 /* 652 * Map file and output file processing structures 653 */ 654 struct os_desc { /* Output section descriptor */ 655 const char *os_name; /* the section name */ 656 Elf_Scn *os_scn; /* the elf section descriptor */ 657 Shdr *os_shdr; /* the elf section header */ 658 Os_desc *os_relosdesc; /* the output relocation section */ 659 APlist *os_relisdescs; /* reloc input section descriptors */ 660 /* for this output section */ 661 os_isdecs_arr os_isdescs; /* lists of input sections in output */ 662 APlist *os_mstrisdescs; /* FLG_IS_INSTRMRG input sections */ 663 Sg_desc *os_sgdesc; /* segment os_desc is placed on */ 664 Elf_Data *os_outdata; /* output sections raw data */ 665 avl_tree_t *os_comdats; /* AVL tree of COMDAT input sections */ 666 /* associated to output section */ 667 Word os_identndx; /* section identifier for input */ 668 /* section processing, followed */ 669 /* by section symbol index */ 670 Word os_ordndx; /* index for section. Used to decide */ 671 /* where to insert section when */ 672 /* reordering sections */ 673 Xword os_szoutrels; /* size of output relocation section */ 674 uint_t os_namehash; /* hash on section name */ 675 uchar_t os_flags; /* various flags */ 676 }; 677 678 #define FLG_OS_KEY 0x01 /* section requires sort keys */ 679 #define FLG_OS_OUTREL 0x02 /* output rel against this section */ 680 #define FLG_OS_SECTREF 0x04 /* isps are not affected by -zignore */ 681 682 /* 683 * Types of segment index. 684 */ 685 typedef enum { 686 LD_PHDR, 687 LD_INTERP, 688 LD_SUNWCAP, 689 LD_TEXT, 690 LD_DATA, 691 LD_BSS, 692 #if defined(_ELF64) 693 LD_LRODATA, /* (amd64-only) */ 694 LD_LDATA, /* (amd64-only) */ 695 #endif 696 LD_DYN, 697 LD_DTRACE, 698 LD_TLS, 699 LD_UNWIND, 700 LD_NOTE, 701 LD_EXTRA, 702 LD_NUM 703 } Segment_id; 704 705 struct sg_desc { /* output segment descriptor */ 706 Segment_id sg_id; /* segment identifier (for sorting) */ 707 Phdr sg_phdr; /* segment header for output file */ 708 const char *sg_name; /* segment name */ 709 Xword sg_round; /* data rounding required (mapfile) */ 710 Xword sg_length; /* maximum segment length; if 0 */ 711 /* segment is not specified */ 712 APlist *sg_osdescs; /* list of output section descriptors */ 713 APlist *sg_secorder; /* list specifying section ordering */ 714 /* for the segment */ 715 Half sg_flags; 716 Sym_desc *sg_sizesym; /* size symbol for this segment */ 717 Xword sg_addralign; /* LCM of sh_addralign */ 718 Elf_Scn *sg_fscn; /* the SCN of the first section. */ 719 }; 720 721 #define FLG_SG_VADDR 0x0001 /* vaddr segment attribute set */ 722 #define FLG_SG_PADDR 0x0002 /* paddr segment attribute set */ 723 #define FLG_SG_LENGTH 0x0004 /* length segment attribute set */ 724 #define FLG_SG_ALIGN 0x0008 /* align segment attribute set */ 725 #define FLG_SG_ROUND 0x0010 /* round segment attribute set */ 726 #define FLG_SG_FLAGS 0x0020 /* flags segment attribute set */ 727 #define FLG_SG_TYPE 0x0040 /* type segment attribute set */ 728 #define FLG_SG_ORDER 0x0080 /* has ordering been turned on for */ 729 /* this segment. */ 730 /* i.e. ?[O] option in mapfile */ 731 #define FLG_SG_NOHDR 0x0100 /* don't map ELF or phdrs into */ 732 /* this segment */ 733 #define FLG_SG_EMPTY 0x0200 /* an empty segment specification */ 734 /* no input sections will be */ 735 /* associated to this section */ 736 #define FLG_SG_KEY 0x0400 /* segment requires sort keys */ 737 #define FLG_SG_DISABLED 0x0800 /* this segment is disabled */ 738 #define FLG_SG_PHREQ 0x1000 /* this segment requires a program */ 739 /* header */ 740 741 struct sec_order { 742 const char *sco_secname; /* section name to be ordered */ 743 Word sco_index; /* ordering index for section */ 744 Half sco_flags; 745 }; 746 747 #define FLG_SGO_USED 0x0001 /* was ordering used? */ 748 749 struct ent_desc { /* input section entrance criteria */ 750 APlist *ec_files; /* files from which to accept */ 751 /* sections */ 752 const char *ec_name; /* name to match (NULL if none) */ 753 Word ec_type; /* section type */ 754 Word ec_attrmask; /* section attribute mask (AWX) */ 755 Word ec_attrbits; /* sections attribute bits */ 756 Sg_desc *ec_segment; /* output segment to enter if matched */ 757 Word ec_ordndx; /* index to determine where section */ 758 /* meeting this criteria should */ 759 /* inserted. Used for reordering */ 760 /* of sections. */ 761 Half ec_flags; 762 }; 763 764 #define FLG_EC_BUILTIN 0x0001 /* built in descriptor */ 765 #define FLG_EC_USED 0x0002 /* entrance criteria met? */ 766 767 /* 768 * One structure is allocated for a move entry, and associated to the symbol 769 * against which a move is targeted. 770 */ 771 typedef struct { 772 Move *md_move; /* original Move entry */ 773 Xword md_start; /* start position */ 774 Xword md_len; /* length of initialization */ 775 Word md_oidx; /* output Move entry index */ 776 } Mv_desc; 777 778 /* 779 * Symbol descriptor. 780 */ 781 struct sym_desc { 782 Alist *sd_GOTndxs; /* list of associated GOT entries */ 783 Sym *sd_sym; /* pointer to symbol table entry */ 784 Sym *sd_osym; /* copy of the original symbol entry */ 785 /* used only for local partial */ 786 Alist *sd_move; /* move information associated with a */ 787 /* partially initialized symbol */ 788 const char *sd_name; /* symbols name */ 789 Ifl_desc *sd_file; /* file where symbol is taken */ 790 Is_desc *sd_isc; /* input section of symbol definition */ 791 Sym_aux *sd_aux; /* auxiliary global symbol info. */ 792 Word sd_symndx; /* index in output symbol table */ 793 Word sd_shndx; /* sect. index sym is associated w/ */ 794 Word sd_flags; /* state flags */ 795 Half sd_flags1; /* more symbol flags */ 796 Half sd_ref; /* reference definition of symbol */ 797 }; 798 799 /* 800 * The auxiliary symbol descriptor contains the additional information (beyond 801 * the symbol descriptor) required to process global symbols. These symbols are 802 * accessed via an internal symbol hash table where locality of reference is 803 * important for performance. 804 */ 805 struct sym_aux { 806 APlist *sa_dfiles; /* files where symbol is defined */ 807 Sym sa_sym; /* copy of symtab entry */ 808 const char *sa_vfile; /* first unavailable definition */ 809 Ifl_desc *sa_bindto; /* symbol to bind to - for translator */ 810 const char *sa_rfile; /* file with first symbol referenced */ 811 Word sa_hash; /* the pure hash value of symbol */ 812 Word sa_PLTndx; /* index into PLT for symbol */ 813 Word sa_PLTGOTndx; /* GOT entry indx for PLT indirection */ 814 Word sa_linkndx; /* index of associated symbol from */ 815 /* ET_DYN file */ 816 Half sa_symspec; /* special symbol ids */ 817 Half sa_overndx; /* output file versioning index */ 818 Half sa_dverndx; /* dependency versioning index */ 819 }; 820 821 /* 822 * Nodes used to track symbols in the global AVL symbol dictionary. 823 */ 824 struct sym_avlnode { 825 avl_node_t sav_node; /* AVL node */ 826 Word sav_hash; /* symbol hash value */ 827 const char *sav_name; /* symbol name */ 828 Sym_desc *sav_symdesc; /* SymDesc entry */ 829 }; 830 831 /* 832 * These are the ids for processing of `Special symbols'. They are used 833 * to set the sym->sd_aux->sa_symspec field. 834 */ 835 #define SDAUX_ID_ETEXT 1 /* etext && _etext symbol */ 836 #define SDAUX_ID_EDATA 2 /* edata && _edata symbol */ 837 #define SDAUX_ID_END 3 /* end, _end, && _END_ symbol */ 838 #define SDAUX_ID_DYN 4 /* DYNAMIC && _DYNAMIC symbol */ 839 #define SDAUX_ID_PLT 5 /* _PROCEDURE_LINKAGE_TABLE_ symbol */ 840 #define SDAUX_ID_GOT 6 /* _GLOBAL_OFFSET_TABLE_ symbol */ 841 #define SDAUX_ID_START 7 /* START_ && _START_ symbol */ 842 843 /* 844 * Flags for sym_desc.sd_flags 845 */ 846 #define FLG_SY_MVTOCOMM 0x00000001 /* assign symbol to common (.bss) */ 847 /* this is a result of a */ 848 /* copy reloc against sym */ 849 #define FLG_SY_GLOBREF 0x00000002 /* a global reference has been seen */ 850 #define FLG_SY_WEAKDEF 0x00000004 /* a weak definition has been used */ 851 #define FLG_SY_CLEAN 0x00000008 /* `Sym' entry points to original */ 852 /* input file (read-only). */ 853 #define FLG_SY_UPREQD 0x00000010 /* symbol value update is required, */ 854 /* either it's used as an entry */ 855 /* point or for relocation, but */ 856 /* it must be updated even if */ 857 /* the -s flag is in effect */ 858 #define FLG_SY_NOTAVAIL 0x00000020 /* symbol is not available to the */ 859 /* application either because it */ 860 /* originates from an implicitly */ 861 /* referenced shared object, or */ 862 /* because it is not part of a */ 863 /* specified version. */ 864 #define FLG_SY_REDUCED 0x00000040 /* a global is reduced to local */ 865 #define FLG_SY_VERSPROM 0x00000080 /* version definition has been */ 866 /* promoted to output file */ 867 #define FLG_SY_PROT 0x00000100 /* stv_protected visibility seen */ 868 869 #define FLG_SY_MAPREF 0x00000200 /* symbol reference generated by user */ 870 /* from mapfile */ 871 #define FLG_SY_REFRSD 0x00000400 /* symbols sd_ref has been raised */ 872 /* due to a copy-relocs */ 873 /* weak-strong pairing */ 874 #define FLG_SY_INTPOSE 0x00000800 /* symbol defines an interposer */ 875 #define FLG_SY_INVALID 0x00001000 /* unwanted/erroneous symbol */ 876 #define FLG_SY_SMGOT 0x00002000 /* small got index assigned to symbol */ 877 /* sparc only */ 878 #define FLG_SY_PARENT 0x00004000 /* symbol to be found in parent */ 879 /* only used with direct bindings */ 880 #define FLG_SY_LAZYLD 0x00008000 /* symbol to cause lazyloading of */ 881 /* parent object */ 882 #define FLG_SY_ISDISC 0x00010000 /* symbol is a member of a DISCARDED */ 883 /* section (COMDAT) */ 884 #define FLG_SY_PAREXPN 0x00020000 /* partially init. symbol to be */ 885 /* expanded */ 886 #define FLG_SY_PLTPAD 0x00040000 /* pltpadding has been allocated for */ 887 /* this symbol */ 888 #define FLG_SY_REGSYM 0x00080000 /* REGISTER symbol (sparc only) */ 889 #define FLG_SY_SOFOUND 0x00100000 /* compared against an SO definition */ 890 #define FLG_SY_EXTERN 0x00200000 /* symbol is external, allows -zdefs */ 891 /* error suppression */ 892 #define FLG_SY_MAPUSED 0x00400000 /* mapfile symbol used (occurred */ 893 /* within a relocatable object) */ 894 #define FLG_SY_COMMEXP 0x00800000 /* COMMON symbol which has been */ 895 /* allocated */ 896 #define FLG_SY_CMDREF 0x01000000 /* symbol was referenced from the */ 897 /* command line. (ld -u <>, */ 898 /* ld -zrtldinfo=<>, ...) */ 899 #define FLG_SY_SPECSEC 0x02000000 /* section index is reserved value */ 900 /* ABS, COMMON, ... */ 901 #define FLG_SY_TENTSYM 0x04000000 /* tentative symbol */ 902 #define FLG_SY_VISIBLE 0x08000000 /* symbols visibility determined */ 903 #define FLG_SY_STDFLTR 0x10000000 /* symbol is a standard filter */ 904 #define FLG_SY_AUXFLTR 0x20000000 /* symbol is an auxiliary filter */ 905 #define FLG_SY_DYNSORT 0x40000000 /* req. in dyn[sym|tls]sort section */ 906 #define FLG_SY_NODYNSORT 0x80000000 /* excluded from dyn[sym_tls]sort sec */ 907 908 /* 909 * Sym_desc.sd_flags1 910 */ 911 #define FLG_SY1_DEFAULT 0x00000001 /* global symbol, default */ 912 #define FLG_SY1_SINGLE 0x00000002 /* global symbol, singleton defined */ 913 #define FLG_SY1_PROTECT 0x00000004 /* global symbol, protected defined */ 914 #define FLG_SY1_EXPORT 0x00000008 /* global symbol, exported defined */ 915 916 #define MSK_SY1_GLOBAL \ 917 (FLG_SY1_DEFAULT | FLG_SY1_SINGLE | FLG_SY1_PROTECT | FLG_SY1_EXPORT) 918 /* this mask indicates that the */ 919 /* symbol has been explicitly */ 920 /* defined within a mapfile */ 921 /* definition, and is a candidate */ 922 /* for versioning */ 923 924 #define FLG_SY1_HIDDEN 0x00000010 /* global symbol, reduce to local */ 925 #define FLG_SY1_ELIM 0x00000020 /* global symbol, eliminate */ 926 #define FLG_SY1_IGNORE 0x00000040 /* global symbol, ignored */ 927 928 #define MSK_SY1_LOCAL (FLG_SY1_HIDDEN | FLG_SY1_ELIM | FLG_SY1_IGNORE) 929 /* this mask allows all local state */ 930 /* flags to be removed when the */ 931 /* symbol is copy relocated */ 932 933 #define FLG_SY1_EXPDEF 0x00000100 /* symbol visibility defined */ 934 /* explicitly */ 935 936 #define MSK_SY1_NOAUTO (FLG_SY1_SINGLE | FLG_SY1_EXPORT | FLG_SY1_EXPDEF) 937 /* this mask indicates that the */ 938 /* symbol is not a candidate for */ 939 /* auto-reduction/elimination */ 940 941 #define FLG_SY1_MAPFILE 0x00000200 /* symbol attribute defined in a */ 942 /* mapfile */ 943 #define FLG_SY1_DIR 0x00000400 /* global symbol, direct bindings */ 944 #define FLG_SY1_NDIR 0x00000800 /* global symbol, nondirect bindings */ 945 #define FLG_SY1_OVERLAP 0x00001000 /* Move entry overlap detected */ 946 947 /* 948 * Create a mask for (sym.st_other & visibility) since the gABI does not yet 949 * define a ELF*_ST_OTHER macro. 950 */ 951 #define MSK_SYM_VISIBILITY 0x7 952 953 /* 954 * Structure to manage the shared object definition lists. There are two lists 955 * that use this structure: 956 * 957 * o ofl_soneed; maintain the list of implicitly required dependencies 958 * (ie. shared objects needed by other shared objects). These definitions 959 * may include RPATH's required to locate the dependencies, and any 960 * version requirements. 961 * 962 * o ofl_socntl; maintains the shared object control definitions. These are 963 * provided by the user (via a mapfile) and are used to indicate any 964 * verion control requirements. 965 */ 966 struct sdf_desc { 967 const char *sdf_name; /* the shared objects file name */ 968 char *sdf_rpath; /* library search path DT_RPATH */ 969 const char *sdf_rfile; /* referencing file for diagnostics */ 970 Ifl_desc *sdf_file; /* the final input file descriptor */ 971 Alist *sdf_vers; /* list of versions that are required */ 972 /* from this object */ 973 Alist *sdf_verneed; /* list of VERNEEDS to create for */ 974 /* object via mapfile ADDVERS */ 975 Word sdf_flags; 976 }; 977 978 #define FLG_SDF_SELECT 0x01 /* version control selection required */ 979 #define FLG_SDF_VERIFY 0x02 /* version definition verification */ 980 /* required */ 981 #define FLG_SDF_ADDVER 0x04 /* add VERNEED references */ 982 983 /* 984 * Structure to manage shared object version usage requirements. 985 */ 986 struct sdv_desc { 987 const char *sdv_name; /* version name */ 988 const char *sdv_ref; /* versions reference */ 989 Word sdv_flags; /* flags */ 990 }; 991 992 #define FLG_SDV_MATCHED 0x01 /* VERDEF found and matched */ 993 994 /* 995 * Structures to manage versioning information. Two versioning structures are 996 * defined: 997 * 998 * o a version descriptor maintains a linked list of versions and their 999 * associated dependencies. This is used to build the version definitions 1000 * for an image being created (see map_symbol), and to determine the 1001 * version dependency graph for any input files that are versioned. 1002 * 1003 * o a version index array contains each version of an input file that is 1004 * being processed. It informs us which versions are available for 1005 * binding, and is used to generate any version dependency information. 1006 */ 1007 struct ver_desc { 1008 const char *vd_name; /* version name */ 1009 Ifl_desc *vd_file; /* file that defined version */ 1010 Word vd_hash; /* hash value of name */ 1011 Half vd_ndx; /* coordinates with symbol index */ 1012 Half vd_flags; /* version information */ 1013 APlist *vd_deps; /* version dependencies */ 1014 Ver_desc *vd_ref; /* dependency's first reference */ 1015 }; 1016 1017 struct ver_index { 1018 const char *vi_name; /* dependency version name */ 1019 Half vi_flags; /* communicates availability */ 1020 Half vi_overndx; /* Index asssigned to this version in */ 1021 /* output object Verneed section */ 1022 Ver_desc *vi_desc; /* cross reference to descriptor */ 1023 }; 1024 1025 /* 1026 * Define any internal version descriptor flags ([vd|vi]_flags). Note that the 1027 * first byte is reserved for user visible flags (refer VER_FLG's in link.h). 1028 */ 1029 #define MSK_VER_USER 0x0f /* mask for user visible flags */ 1030 1031 #define FLG_VER_AVAIL 0x10 /* version is available for binding */ 1032 #define FLG_VER_REFER 0x20 /* version has been referenced */ 1033 #define FLG_VER_CYCLIC 0x40 /* a member of cyclic dependency */ 1034 1035 /* 1036 * isalist(1) descriptor - used to break an isalist string into its component 1037 * options. 1038 */ 1039 struct isa_opt { 1040 char *isa_name; /* individual isa option name */ 1041 size_t isa_namesz; /* and associated size */ 1042 }; 1043 1044 struct isa_desc { 1045 char *isa_list; /* sysinfo(SI_ISALIST) list */ 1046 size_t isa_listsz; /* and associated size */ 1047 Isa_opt *isa_opt; /* table of individual isa options */ 1048 size_t isa_optno; /* and associated number */ 1049 }; 1050 1051 /* 1052 * uname(2) descriptor - used to break a utsname structure into its component 1053 * options (at least those that we're interested in). 1054 */ 1055 struct uts_desc { 1056 char *uts_osname; /* operating system name */ 1057 size_t uts_osnamesz; /* and associated size */ 1058 char *uts_osrel; /* operating system release */ 1059 size_t uts_osrelsz; /* and associated size */ 1060 }; 1061 1062 /* 1063 * SHT_GROUP descriptor - used to track group sections at the global 1064 * level to resolve conflicts and determine which to keep. 1065 */ 1066 struct group_desc { 1067 Is_desc *gd_isc; /* input section descriptor */ 1068 Is_desc *gd_oisc; /* overriding input section */ 1069 /* descriptor when discarded */ 1070 const char *gd_name; /* group name (signature symbol) */ 1071 Word *gd_data; /* data for group section */ 1072 size_t gd_cnt; /* number of entries in group data */ 1073 }; 1074 1075 /* 1076 * Indexes into the ld_support_funcs[] table. 1077 */ 1078 typedef enum { 1079 LDS_VERSION = 0, /* Must be first and have value 0 */ 1080 LDS_INPUT_DONE, 1081 LDS_START, 1082 LDS_ATEXIT, 1083 LDS_OPEN, 1084 LDS_FILE, 1085 LDS_INSEC, 1086 LDS_SEC, 1087 LDS_NUM 1088 } Support_ndx; 1089 1090 /* 1091 * Structure to manage archive member caching. Each archive has an archive 1092 * descriptor (Ar_desc) associated with it. This contains pointers to the 1093 * archive symbol table (obtained by elf_getarsyms(3e)) and an auxiliary 1094 * structure (Ar_uax[]) that parallels this symbol table. The member element 1095 * of this auxiliary table indicates whether the archive member associated with 1096 * the symbol offset has already been extracted (AREXTRACTED) or partially 1097 * processed (refer process_member()). 1098 */ 1099 typedef struct ar_mem { 1100 Elf *am_elf; /* elf descriptor for this member */ 1101 char *am_name; /* members name */ 1102 char *am_path; /* path (ie. lib(foo.o)) */ 1103 Sym *am_syms; /* start of global symbols */ 1104 char *am_strs; /* associated string table start */ 1105 Xword am_symn; /* no. of global symbols */ 1106 } Ar_mem; 1107 1108 typedef struct ar_aux { 1109 Sym_desc *au_syms; /* internal symbol descriptor */ 1110 Ar_mem *au_mem; /* associated member */ 1111 } Ar_aux; 1112 1113 #define FLG_ARMEM_PROC (Ar_mem *)-1 1114 1115 typedef struct ar_desc { 1116 const char *ad_name; /* archive file name */ 1117 Elf *ad_elf; /* elf descriptor for the archive */ 1118 Elf_Arsym *ad_start; /* archive symbol table start */ 1119 Ar_aux *ad_aux; /* auxiliary symbol information */ 1120 dev_t ad_stdev; /* device id and inode number for */ 1121 ino_t ad_stino; /* multiple inclusion checks */ 1122 ofl_flag_t ad_flags; /* archive specific cmd line flags */ 1123 } Ar_desc; 1124 1125 /* 1126 * Define any archive descriptor flags. NOTE, make sure they do not clash with 1127 * any output file descriptor archive extraction flags, as these are saved in 1128 * the same entry (see MSK_OF1_ARCHIVE). 1129 */ 1130 #define FLG_ARD_EXTRACT 0x00010000 /* archive member has been extracted */ 1131 1132 /* 1133 * Function Declarations. 1134 */ 1135 #if defined(_ELF64) 1136 1137 #define ld_create_outfile ld64_create_outfile 1138 #define ld_ent_setup ld64_ent_setup 1139 #define ld_init_strings ld64_init_strings 1140 #define ld_init_target ld64_init_target 1141 #define ld_make_sections ld64_make_sections 1142 #define ld_main ld64_main 1143 #define ld_ofl_cleanup ld64_ofl_cleanup 1144 #define ld_process_mem ld64_process_mem 1145 #define ld_reloc_init ld64_reloc_init 1146 #define ld_reloc_process ld64_reloc_process 1147 #define ld_sym_validate ld64_sym_validate 1148 #define ld_update_outfile ld64_update_outfile 1149 1150 #else 1151 1152 #define ld_create_outfile ld32_create_outfile 1153 #define ld_ent_setup ld32_ent_setup 1154 #define ld_init_strings ld32_init_strings 1155 #define ld_init_target ld32_init_target 1156 #define ld_make_sections ld32_make_sections 1157 #define ld_main ld32_main 1158 #define ld_ofl_cleanup ld32_ofl_cleanup 1159 #define ld_process_mem ld32_process_mem 1160 #define ld_reloc_init ld32_reloc_init 1161 #define ld_reloc_process ld32_reloc_process 1162 #define ld_sym_validate ld32_sym_validate 1163 #define ld_update_outfile ld32_update_outfile 1164 1165 #endif 1166 1167 extern int ld_getopt(Lm_list *, int, int, char **); 1168 1169 extern int ld32_main(int, char **, Half); 1170 extern int ld64_main(int, char **, Half); 1171 1172 extern uintptr_t ld_create_outfile(Ofl_desc *); 1173 extern uintptr_t ld_ent_setup(Ofl_desc *, Xword); 1174 extern uintptr_t ld_init_strings(Ofl_desc *); 1175 extern int ld_init_target(Lm_list *, Half mach); 1176 extern uintptr_t ld_make_sections(Ofl_desc *); 1177 extern void ld_ofl_cleanup(Ofl_desc *); 1178 extern Ifl_desc *ld_process_mem(const char *, const char *, char *, 1179 size_t, Ofl_desc *, Rej_desc *); 1180 extern uintptr_t ld_reloc_init(Ofl_desc *); 1181 extern uintptr_t ld_reloc_process(Ofl_desc *); 1182 extern uintptr_t ld_sym_validate(Ofl_desc *); 1183 extern uintptr_t ld_update_outfile(Ofl_desc *); 1184 1185 #ifdef __cplusplus 1186 } 1187 #endif 1188 1189 #endif /* _LIBLD_H */ 1190