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 this type. Symbols come for processing in sorted 133 * order, so a 1 element cache suffices to eliminate duplicate lookups. 134 */ 135 typedef struct sreloc_cache { 136 Sym_desc *sr_osdp; /* Original symbol */ 137 Sym_desc *sr_rsdp; /* Replacement symbol */ 138 } Sreloc_cache; 139 140 /* 141 * Output file processing structure 142 */ 143 typedef Lword ofl_flag_t; 144 struct ofl_desc { 145 char *ofl_sgsid; /* link-editor identification */ 146 const char *ofl_name; /* full file name */ 147 Elf *ofl_elf; /* elf_memory() elf descriptor */ 148 Elf *ofl_welf; /* ELF_C_WRITE elf descriptor */ 149 Ehdr *ofl_dehdr; /* default elf header, and new elf */ 150 Ehdr *ofl_nehdr; /* header describing this file */ 151 Phdr *ofl_phdr; /* program header descriptor */ 152 Phdr *ofl_tlsphdr; /* TLS phdr */ 153 int ofl_fd; /* file descriptor */ 154 size_t ofl_size; /* image size */ 155 List ofl_maps; /* list of input mapfiles */ 156 List ofl_segs; /* list of segments */ 157 List ofl_ents; /* list of entrance descriptors */ 158 List ofl_objs; /* relocatable object file list */ 159 Word ofl_objscnt; /* and count */ 160 List ofl_ars; /* archive library list */ 161 Word ofl_arscnt; /* and count */ 162 int ofl_ars_gsandx; /* archive group argv index. 0 means */ 163 /* no current group, < 0 means */ 164 /* error reported. >0 is cur ndx */ 165 Word ofl_ars_gsndx; /* current -zrescan-start ofl_ars ndx */ 166 List ofl_sos; /* shared object list */ 167 Word ofl_soscnt; /* and count */ 168 List ofl_soneed; /* list of implicitly required .so's */ 169 List ofl_socntl; /* list of .so control definitions */ 170 List ofl_outrels; /* list of output relocations */ 171 Word ofl_outrelscnt; /* and count */ 172 List ofl_actrels; /* list of relocations to perform */ 173 Word ofl_actrelscnt; /* and count */ 174 Word ofl_entrelscnt; /* no of relocations entered */ 175 List ofl_copyrels; /* list of copy relocations */ 176 List ofl_ordered; /* list of shf_ordered sections */ 177 List ofl_syminfsyms; /* list of interesting syms */ 178 /* for syminfo processing */ 179 List ofl_ismove; /* list of .SUNW_move sections */ 180 List ofl_mvrelisdescs; /* list of relocation input section */ 181 /* targeting to expanded area */ 182 List ofl_parsym; /* list of Parsym_info */ 183 List ofl_extrarels; /* relocation sections which have */ 184 /* a NULL sh_info */ 185 avl_tree_t *ofl_groups; /* pointer to head of Groups AVL tree */ 186 List ofl_initarray; /* list of init array func names */ 187 List ofl_finiarray; /* list of fini array func names */ 188 List ofl_preiarray; /* list of preinit array func names */ 189 List ofl_rtldinfo; /* list of rtldinfo syms */ 190 List ofl_osgroups; /* list of output GROUP sections */ 191 List ofl_ostlsseg; /* pointer to sections in TLS segment */ 192 #if defined(_ELF64) /* for amd64 target only */ 193 List ofl_unwind; /* list of unwind output sections */ 194 Os_desc *ofl_unwindhdr; /* Unwind hdr */ 195 #endif 196 avl_tree_t ofl_symavl; /* pointer to head of Syms AVL tree */ 197 Sym_desc **ofl_regsyms; /* array of potential register */ 198 Word ofl_regsymsno; /* symbols and array count */ 199 Word ofl_regsymcnt; /* no. of output register symbols */ 200 Word ofl_lregsymcnt; /* no. of local register symbols */ 201 Sym_desc *ofl_dtracesym; /* ld -zdtrace= */ 202 ofl_flag_t ofl_flags; /* various state bits, args etc. */ 203 ofl_flag_t ofl_flags1; /* more flags */ 204 void *ofl_entry; /* entry point (-e and Sym_desc *) */ 205 char *ofl_filtees; /* shared objects we are a filter for */ 206 const char *ofl_soname; /* (-h option) output file name for */ 207 /* dynamic structure */ 208 const char *ofl_interp; /* interpreter name used by exec() */ 209 char *ofl_rpath; /* run path to store in .dynamic */ 210 char *ofl_config; /* config path to store in .dynamic */ 211 List ofl_ulibdirs; /* user supplied library search list */ 212 List ofl_dlibdirs; /* default library search list */ 213 Word ofl_vercnt; /* number of versions to generate */ 214 List ofl_verdesc; /* list of version descriptors */ 215 size_t ofl_verdefsz; /* size of version definition section */ 216 size_t ofl_verneedsz; /* size of version needed section */ 217 Word ofl_entercnt; /* no. of global symbols entered */ 218 Word ofl_globcnt; /* no. of global symbols to output */ 219 Word ofl_scopecnt; /* no. of scoped symbols to output */ 220 Word ofl_dynscopecnt; /* no. scoped syms in .SUNW_ldynsym */ 221 Word ofl_elimcnt; /* no. of eliminated symbols */ 222 Word ofl_locscnt; /* no. of local symbols in .symtab */ 223 Word ofl_dynlocscnt; /* no. local symbols in .SUNW_ldynsym */ 224 Word ofl_dynsymsortcnt; /* no. ndx in .SUNW_dynsymsort */ 225 Word ofl_dyntlssortcnt; /* no. ndx in .SUNW_dyntlssort */ 226 Word ofl_dynshdrcnt; /* no. of output section in .dynsym */ 227 Word ofl_shdrcnt; /* no. of output sections */ 228 Str_tbl *ofl_shdrsttab; /* Str_tbl for shdr strtab */ 229 Str_tbl *ofl_strtab; /* Str_tbl for symtab strtab */ 230 Str_tbl *ofl_dynstrtab; /* Str_tbl for dymsym strtab */ 231 Gotndx *ofl_tlsldgotndx; /* index to LD TLS_index structure */ 232 Xword ofl_relocsz; /* size of output relocations */ 233 Xword ofl_relocgotsz; /* size of .got relocations */ 234 Xword ofl_relocpltsz; /* size of .plt relocations */ 235 Xword ofl_relocbsssz; /* size of .bss (copy) relocations */ 236 Xword ofl_relocrelsz; /* size of .rel[a] relocations */ 237 Word ofl_relocincnt; /* no. of input relocations */ 238 Word ofl_reloccnt; /* tot number of output relocations */ 239 Word ofl_reloccntsub; /* tot numb of output relocations to */ 240 /* skip (-zignore) */ 241 Word ofl_relocrelcnt; /* tot number of relative */ 242 /* relocations */ 243 Word ofl_gotcnt; /* no. of .got entries */ 244 Word ofl_pltcnt; /* no. of .plt entries */ 245 Word ofl_pltpad; /* no. of .plt padd entries */ 246 Word ofl_hashbkts; /* no. of hash buckets required */ 247 Is_desc *ofl_isbss; /* .bss input section (globals) */ 248 Is_desc *ofl_islbss; /* .lbss input section (globals) */ 249 Is_desc *ofl_istlsbss; /* .tlsbss input section (globals) */ 250 Is_desc *ofl_isparexpn; /* -z nopartial .data input section */ 251 Os_desc *ofl_osdynamic; /* .dynamic output section */ 252 Os_desc *ofl_osdynsym; /* .dynsym output section */ 253 Os_desc *ofl_osldynsym; /* .SUNW_ldynsym output section */ 254 Os_desc *ofl_osdynstr; /* .dynstr output section */ 255 Os_desc *ofl_osdynsymsort; /* .SUNW_dynsymsort output section */ 256 Os_desc *ofl_osdyntlssort; /* .SUNW_dyntlssort output section */ 257 Os_desc *ofl_osgot; /* .got output section */ 258 Os_desc *ofl_oshash; /* .hash output section */ 259 Os_desc *ofl_osinitarray; /* .initarray output section */ 260 Os_desc *ofl_osfiniarray; /* .finiarray output section */ 261 Os_desc *ofl_ospreinitarray; /* .preinitarray output section */ 262 Os_desc *ofl_osinterp; /* .interp output section */ 263 Os_desc *ofl_oscap; /* .SUNW_cap output section */ 264 Os_desc *ofl_osplt; /* .plt output section */ 265 Os_desc *ofl_osmove; /* .SUNW_move output section */ 266 Os_desc *ofl_osrelhead; /* first relocation section */ 267 Os_desc *ofl_osrel; /* .rel[a] relocation section */ 268 Os_desc *ofl_osshstrtab; /* .shstrtab output section */ 269 Os_desc *ofl_osstrtab; /* .strtab output section */ 270 Os_desc *ofl_ossymtab; /* .symtab output section */ 271 Os_desc *ofl_ossymshndx; /* .symtab_shndx output section */ 272 Os_desc *ofl_osdynshndx; /* .dynsym_shndx output section */ 273 Os_desc *ofl_osldynshndx; /* .SUNW_ldynsym_shndx output sec */ 274 Os_desc *ofl_osverdef; /* .version definition output section */ 275 Os_desc *ofl_osverneed; /* .version needed output section */ 276 Os_desc *ofl_osversym; /* .version symbol ndx output section */ 277 Word ofl_dtflags_1; /* DT_FLAGS_1 entries */ 278 Word ofl_dtflags; /* DT_FLAGS entries */ 279 Os_desc *ofl_ossyminfo; /* .SUNW_syminfo output section */ 280 Half ofl_parexpnndx; /* -z nopartial section index */ 281 /* Ref. at perform_outreloc() in */ 282 /* libld/{mach}/machrel.c */ 283 Xword *ofl_checksum; /* DT_CHECKSUM value address */ 284 char *ofl_depaudit; /* dependency auditing required (-P) */ 285 char *ofl_audit; /* object auditing required (-p) */ 286 Alist *ofl_symfltrs; /* per-symbol filtees and their */ 287 Alist *ofl_dtsfltrs; /* associated .dynamic/.dynstrs */ 288 Xword ofl_hwcap_1; /* hardware capabilities */ 289 Xword ofl_sfcap_1; /* software capabilities */ 290 Lm_list *ofl_lml; /* runtime link-map list */ 291 Gottable *ofl_gottable; /* debugging got information */ 292 Sreloc_cache ofl_sr_cache; /* Cache last result from */ 293 /* sloppy_comdat_reloc() */ 294 }; 295 296 #define FLG_OF_DYNAMIC 0x00000001 /* generate dynamic output module */ 297 #define FLG_OF_STATIC 0x00000002 /* generate static output module */ 298 #define FLG_OF_EXEC 0x00000004 /* generate an executable */ 299 #define FLG_OF_RELOBJ 0x00000008 /* generate a relocatable object */ 300 #define FLG_OF_SHAROBJ 0x00000010 /* generate a shared object */ 301 #define FLG_OF_BFLAG 0x00000020 /* do no special plt building: -b */ 302 #define FLG_OF_IGNENV 0x00000040 /* ignore LD_LIBRARY_PATH: -i */ 303 #define FLG_OF_STRIP 0x00000080 /* strip output: -s */ 304 #define FLG_OF_NOWARN 0x00000100 /* disable symbol warnings: -t */ 305 #define FLG_OF_NOUNDEF 0x00000200 /* allow no undefined symbols: -zdefs */ 306 #define FLG_OF_PURETXT 0x00000400 /* allow no text relocations: -ztext */ 307 #define FLG_OF_GENMAP 0x00000800 /* generate a memory map: -m */ 308 #define FLG_OF_DYNLIBS 0x00001000 /* dynamic input allowed: -Bdynamic */ 309 #define FLG_OF_SYMBOLIC 0x00002000 /* bind global symbols: -Bsymbolic */ 310 #define FLG_OF_ADDVERS 0x00004000 /* add version stamp: -Qy */ 311 #define FLG_OF_NOLDYNSYM 0x00008000 /* -znoldynsym set */ 312 #define FLG_OF_SEGORDER 0x00010000 /* segment ordering is required */ 313 #define FLG_OF_SEGSORT 0x00020000 /* segment sorting is required */ 314 #define FLG_OF_TEXTREL 0x00040000 /* text relocations have been found */ 315 #define FLG_OF_MULDEFS 0x00080000 /* multiple symbols are allowed */ 316 #define FLG_OF_TLSPHDR 0x00100000 /* a TLS program header is required */ 317 #define FLG_OF_BLDGOT 0x00200000 /* build GOT table */ 318 #define FLG_OF_VERDEF 0x00400000 /* record version definitions */ 319 #define FLG_OF_VERNEED 0x00800000 /* record version dependencies */ 320 #define FLG_OF_NOVERSEC 0x01000000 /* don't record version sections */ 321 #define FLG_OF_KEY 0x02000000 /* file requires sort keys */ 322 #define FLG_OF_PROCRED 0x04000000 /* process any symbol reductions by */ 323 /* effecting the symbol table */ 324 /* output and relocations */ 325 #define FLG_OF_SYMINFO 0x08000000 /* create a syminfo section */ 326 #define FLG_OF_AUX 0x10000000 /* ofl_filter is an auxiliary filter */ 327 #define FLG_OF_FATAL 0x20000000 /* fatal error during input */ 328 #define FLG_OF_WARN 0x40000000 /* warning during input processing. */ 329 #define FLG_OF_VERBOSE 0x80000000 /* -z verbose flag set */ 330 331 #define FLG_OF_MAPSYMB 0x000100000000 /* symbolic scope definition seen */ 332 #define FLG_OF_MAPGLOB 0x000200000000 /* global scope definition seen */ 333 #define FLG_OF_COMREL 0x000400000000 /* -z combreloc set, which enables */ 334 /* DT_RELACNT tracking, */ 335 #define FLG_OF_NOCOMREL 0x000800000000 /* -z nocombreloc set */ 336 #define FLG_OF_AUTOLCL 0x001000000000 /* automatically reduce unspecified */ 337 /* global symbols to locals */ 338 #define FLG_OF_AUTOELM 0x002000000000 /* automatically eliminate */ 339 /* unspecified global symbols */ 340 #define FLG_OF_REDLSYM 0x004000000000 /* reduce local symbols */ 341 #define FLG_OF_SECORDER 0x008000000000 /* section ordering is required */ 342 343 /* 344 * In the flags1 arena, establish any options that are applicable to archive 345 * extraction first, and associate a mask. These values are recorded with any 346 * archive descriptor so that they may be reset should the archive require a 347 * rescan to try and resolve undefined symbols. 348 */ 349 #define FLG_OF1_ALLEXRT 0x00000001 /* extract all members from an */ 350 /* archive file */ 351 #define FLG_OF1_WEAKEXT 0x00000002 /* allow archive extraction to */ 352 /* resolve weak references */ 353 #define MSK_OF1_ARCHIVE 0x00000003 /* archive flags mask */ 354 355 #define FLG_OF1_NOINTRP 0x00000008 /* -z nointerp flag set */ 356 #define FLG_OF1_ZDIRECT 0x00000010 /* -z direct flag set */ 357 #define FLG_OF1_NDIRECT 0x00000020 /* no-direct bindings specified */ 358 #define FLG_OF1_OVHWCAP 0x00000040 /* override any input hardware or */ 359 #define FLG_OF1_OVSFCAP 0x00000080 /* software capabilities */ 360 #define FLG_OF1_RELDYN 0x00000100 /* process .dynamic in rel obj */ 361 #define FLG_OF1_NRLXREL 0x00000200 /* -z norelaxreloc flag set */ 362 #define FLG_OF1_RLXREL 0x00000400 /* -z relaxreloc flag set */ 363 #define FLG_OF1_IGNORE 0x00000800 /* ignore unused dependencies */ 364 365 #define FLG_OF1_TEXTOFF 0x00002000 /* text relocations are ok */ 366 #define FLG_OF1_ABSEXEC 0x00004000 /* -zabsexec set */ 367 #define FLG_OF1_LAZYLD 0x00008000 /* lazy loading of objects enabled */ 368 #define FLG_OF1_GRPPRM 0x00010000 /* dependencies are to have */ 369 /* GROUPPERM enabled */ 370 #define FLG_OF1_OVRFLW 0x00020000 /* size exceeds 32-bit limitation */ 371 /* of 32-bit libld */ 372 #define FLG_OF1_NOPARTI 0x00040000 /* -znopartial set */ 373 #define FLG_OF1_BSSOREL 0x00080000 /* output relocation against bss */ 374 /* section */ 375 #define FLG_OF1_TLSOREL 0x00100000 /* output relocation against .tlsbss */ 376 /* section */ 377 #define FLG_OF1_MEMORY 0x00200000 /* produce a memory model */ 378 379 #define FLG_OF1_ENCDIFF 0x00800000 /* Host running linker has different */ 380 /* byte order than output object */ 381 #define FLG_OF1_VADDR 0x01000000 /* vaddr was explicitly set */ 382 #define FLG_OF1_EXTRACT 0x02000000 /* archive member has been extracted */ 383 #define FLG_OF1_RESCAN 0x04000000 /* any archives should be rescanned */ 384 #define FLG_OF1_IGNPRC 0x08000000 /* ignore processing required */ 385 #define FLG_OF1_NCSTTAB 0x10000000 /* -znocompstrtab set */ 386 #define FLG_OF1_DONE 0x20000000 /* link-editor processing complete */ 387 #define FLG_OF1_NONREG 0x40000000 /* non-regular file specified as */ 388 /* the output file */ 389 #define FLG_OF1_ALNODIR 0x80000000 /* establish NODIRECT for all */ 390 /* exported interfaces. */ 391 392 /* 393 * Test to see if the output file would allow the presence of 394 * a .dynsym section. 395 */ 396 #define OFL_ALLOW_DYNSYM(_ofl) (((_ofl)->ofl_flags & \ 397 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == FLG_OF_DYNAMIC) 398 399 /* 400 * Test to see if the output file would allow the presence of 401 * a .SUNW_ldynsym section. The requirements are that a .dynsym 402 * is allowed, and -znoldynsym has not been specified. Note that 403 * even if the answer is True (1), we will only generate one if there 404 * are local symbols that require it. 405 */ 406 #define OFL_ALLOW_LDYNSYM(_ofl) (((_ofl)->ofl_flags & \ 407 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ | FLG_OF_NOLDYNSYM)) == FLG_OF_DYNAMIC) 408 409 /* 410 * Test to see if relocation processing should be done. This is normally 411 * true, but can be disabled via the '-z noreloc' option. Note that 412 * relocatable objects are still relocated even if '-z noreloc' is present. 413 */ 414 #define OFL_DO_RELOC(_ofl) (((_ofl)->ofl_flags & FLG_OF_RELOBJ) || \ 415 !((_ofl)->ofl_dtflags_1 & DF_1_NORELOC)) 416 417 /* 418 * Relocation (active & output) processing structure - transparent to common 419 * code. 420 * 421 * Note that rel_raddend is primarily only of interest to RELA relocations, 422 * and is set to 0 for REL. However, there is an exception: If FLG_REL_NADDEND 423 * is set, then rel_raddend contains a replacement value for the implicit 424 * addend found in the relocation target. 425 */ 426 struct rel_desc { 427 Os_desc *rel_osdesc; /* output section reloc is against */ 428 Is_desc *rel_isdesc; /* input section reloc is against */ 429 const char *rel_sname; /* symbol name (may be "unknown") */ 430 Sym_desc *rel_sym; /* sym relocation is against */ 431 Sym_desc *rel_usym; /* strong sym if this is a weak pair */ 432 Mv_desc *rel_move; /* move table information */ 433 Word rel_flags; /* misc. flags for relocations */ 434 Word rel_rtype; /* relocation type */ 435 Xword rel_roffset; /* relocation offset */ 436 Sxword rel_raddend; /* addend from input relocation */ 437 Word rel_typedata; /* ELF_R_TYPE_DATA(info) */ 438 }; 439 440 /* 441 * common flags used on the Rel_desc structure (defined in machrel.h). 442 */ 443 #define FLG_REL_GOT 0x00000001 /* relocation against GOT */ 444 #define FLG_REL_PLT 0x00000002 /* relocation against PLT */ 445 #define FLG_REL_BSS 0x00000004 /* relocation against BSS */ 446 #define FLG_REL_LOAD 0x00000008 /* section loadable */ 447 #define FLG_REL_SCNNDX 0x00000010 /* use section index for symbol ndx */ 448 #define FLG_REL_CLVAL 0x00000020 /* clear VALUE for active relocation */ 449 #define FLG_REL_ADVAL 0x00000040 /* add VALUE for output relocation, */ 450 /* only relevant to SPARC and */ 451 /* R_SPARC_RELATIVE */ 452 #define FLG_REL_GOTCL 0x00000080 /* clear the GOT entry. This is */ 453 /* relevant to RELA relocations, */ 454 /* not REL (i386) relocations */ 455 #define FLG_REL_MOVETAB 0x00000100 /* Relocation against .SUNW_move */ 456 /* adjustments required before */ 457 /* actual relocation */ 458 #define FLG_REL_NOINFO 0x00000200 /* Relocation comes from a section */ 459 /* with a null sh_info field */ 460 #define FLG_REL_REG 0x00000400 /* Relocation target is reg sym */ 461 #define FLG_REL_FPTR 0x00000800 /* relocation against func. desc. */ 462 #define FLG_REL_RFPTR1 0x00001000 /* Relative relocation against */ 463 /* 1st part of FD */ 464 #define FLG_REL_RFPTR2 0x00002000 /* Relative relocation against */ 465 /* 2nd part of FD */ 466 #define FLG_REL_DISP 0x00004000 /* *disp* relocation */ 467 #define FLG_REL_STLS 0x00008000 /* IE TLS reference to */ 468 /* static TLS GOT index */ 469 #define FLG_REL_DTLS 0x00010000 /* GD TLS reference relative to */ 470 /* dynamic TLS GOT index */ 471 #define FLG_REL_MTLS 0x00020000 /* LD TLS reference against GOT */ 472 #define FLG_REL_STTLS 0x00040000 /* LE TLS reference directly */ 473 /* to static tls index */ 474 #define FLG_REL_TLSFIX 0x00080000 /* relocation points to TLS instr. */ 475 /* which needs updating */ 476 #define FLG_REL_RELA 0x00100000 /* descripter captures a Rela */ 477 #define FLG_REL_GOTFIX 0x00200000 /* relocation points to GOTOP instr. */ 478 /* which needs updating */ 479 #define FLG_REL_NADDEND 0x00400000 /* Replace implicit addend in dest */ 480 /* with value in rel_raddend */ 481 /* Relevant to REL (i386) */ 482 /* relocations, not to RELA. */ 483 484 /* 485 * Structure to hold a cache of Relocations. 486 */ 487 struct rel_cache { 488 Rel_desc *rc_end; 489 Rel_desc *rc_free; 490 }; 491 492 /* 493 * Symbol value descriptor. For relocatable objects, each symbols value is 494 * its offset within its associated section. Therefore, to uniquely define 495 * each symbol within a reloctable object, record and sort the sh_offset and 496 * symbol value. This information is used to seach for displacement 497 * relocations as part of copy relocation validation. 498 */ 499 typedef struct { 500 Addr ssv_value; 501 Sym_desc *ssv_sdp; 502 } Ssv_desc; 503 504 /* 505 * Input file processing structures. 506 */ 507 struct ifl_desc { /* input file descriptor */ 508 const char *ifl_name; /* full file name */ 509 const char *ifl_soname; /* shared object name */ 510 dev_t ifl_stdev; /* device id and inode number for .so */ 511 ino_t ifl_stino; /* multiple inclusion checks */ 512 Ehdr *ifl_ehdr; /* elf header describing this file */ 513 Elf *ifl_elf; /* elf descriptor for this file */ 514 Sym_desc **ifl_oldndx; /* original symbol table indices */ 515 Sym_desc *ifl_locs; /* symbol desc version of locals */ 516 Ssv_desc *ifl_sortsyms; /* sorted list of symbols by value */ 517 Word ifl_locscnt; /* no. of local symbols to process */ 518 Word ifl_symscnt; /* total no. of symbols to process */ 519 Word ifl_sortcnt; /* no. of sorted symbols to process */ 520 Word ifl_shnum; /* number of sections in file */ 521 Word ifl_shstrndx; /* index to .shstrtab */ 522 Word ifl_vercnt; /* number of versions in file */ 523 Is_desc **ifl_isdesc; /* isdesc[scn ndx] = Is_desc ptr */ 524 Sdf_desc *ifl_sdfdesc; /* control definition */ 525 Versym *ifl_versym; /* version symbol table array */ 526 Ver_index *ifl_verndx; /* verndx[ver ndx] = Ver_index */ 527 List ifl_verdesc; /* version descriptor list */ 528 List ifl_relsect; /* relocation section list */ 529 Alist *ifl_groups; /* SHT_GROUP section list */ 530 Half ifl_neededndx; /* index to NEEDED in .dyn section */ 531 Word ifl_flags; /* Explicit/implicit reference */ 532 }; 533 534 #define FLG_IF_CMDLINE 0x00000001 /* full filename specified from the */ 535 /* command line (no -l) */ 536 #define FLG_IF_NEEDED 0x00000002 /* shared object should be recorded */ 537 #define FLG_IF_DIRECT 0x00000004 /* establish direct bindings to this */ 538 /* object */ 539 #define FLG_IF_EXTRACT 0x00000008 /* file extracted from an archive */ 540 #define FLG_IF_VERNEED 0x00000010 /* version dependency information is */ 541 /* required */ 542 #define FLG_IF_DEPREQD 0x00000020 /* dependency is required to satisfy */ 543 /* symbol references */ 544 #define FLG_IF_NEEDSTR 0x00000040 /* dependency specified by -Nn */ 545 /* flag */ 546 #define FLG_IF_IGNORE 0x00000080 /* ignore unused dependencies */ 547 #define FLG_IF_NODIRECT 0x00000100 /* object contains symbols that */ 548 /* cannot be directly bound to. */ 549 #define FLG_IF_LAZYLD 0x00000200 /* bindings to this object should be */ 550 /* lazy loaded */ 551 #define FLG_IF_GRPPRM 0x00000400 /* this dependency should have the */ 552 /* DF_P1_GROUPPERM flag set */ 553 #define FLG_IF_DISPPEND 0x00000800 /* displacement relocation done */ 554 /* in the ld time. */ 555 #define FLG_IF_DISPDONE 0x00001000 /* displacement relocation done */ 556 /* at the run time */ 557 #define FLG_IF_MAPFILE 0x00002000 /* file is a mapfile */ 558 #define FLG_IF_HSTRTAB 0x00004000 /* file has a string section */ 559 #define FLG_IF_FILEREF 0x00008000 /* file contains a section which */ 560 /* is included in the output */ 561 /* allocatable image */ 562 #define FLG_IF_GNUVER 0x00010000 /* file used GNU-style versioning */ 563 #define FLG_IF_ORDERED 0x00020000 /* ordered section processing */ 564 /* required */ 565 566 struct is_desc { /* input section descriptor */ 567 const char *is_name; /* original section name */ 568 Shdr *is_shdr; /* the elf section header */ 569 Ifl_desc *is_file; /* infile desc for this section */ 570 Os_desc *is_osdesc; /* new output section for this */ 571 /* input section */ 572 Elf_Data *is_indata; /* input sections raw data */ 573 Is_desc *is_symshndx; /* related SHT_SYM_SHNDX section */ 574 Is_desc *is_comdatkeep; /* If COMDAT section is discarded, */ 575 /* this is section that was kept */ 576 Word is_scnndx; /* original section index in file */ 577 Word is_txtndx; /* Index for section. Used to decide */ 578 /* where to insert section when */ 579 /* reordering sections */ 580 Word is_keyident; /* key for SHF_ORDERED processing */ 581 /* and identifier used for */ 582 /* placing/ordering sections */ 583 Word is_flags; /* Various flags */ 584 }; 585 586 #define FLG_IS_ORDERED 0x0001 /* this is a SHF_ORDERED section */ 587 #define FLG_IS_KEY 0x0002 /* section requires sort keys */ 588 #define FLG_IS_DISCARD 0x0004 /* section is to be discarded */ 589 #define FLG_IS_RELUPD 0x0008 /* symbol defined here may have moved */ 590 #define FLG_IS_SECTREF 0x0010 /* section has been referenced */ 591 #define FLG_IS_GDATADEF 0x0020 /* section contains global data sym */ 592 #define FLG_IS_EXTERNAL 0x0040 /* isp from an user file */ 593 #define FLG_IS_INSTRMRG 0x0080 /* Usable SHF_MERGE|SHF_STRINGS sec */ 594 #define FLG_IS_GNSTRMRG 0x0100 /* Generated mergeable string section */ 595 #define FLG_IS_GROUPS 0x0200 /* section has groups to process */ 596 #define FLG_IS_PLACE 0x0400 /* section requires to be placed */ 597 #define FLG_IS_COMDAT 0x0800 /* section is COMDAT */ 598 599 /* 600 * Map file and output file processing structures 601 */ 602 struct os_desc { /* Output section descriptor */ 603 const char *os_name; /* the section name */ 604 Elf_Scn *os_scn; /* the elf section descriptor */ 605 Shdr *os_shdr; /* the elf section header */ 606 Os_desc *os_relosdesc; /* the output relocation section */ 607 APlist *os_relisdescs; /* reloc input section descriptors */ 608 /* for this output section */ 609 List os_isdescs; /* list of input sections in output */ 610 APlist *os_mstrisdescs; /* FLG_IS_INSTRMRG input sections */ 611 Sort_desc *os_sort; /* used for sorting sections */ 612 Sg_desc *os_sgdesc; /* segment os_desc is placed on */ 613 Elf_Data *os_outdata; /* output sections raw data */ 614 avl_tree_t *os_comdats; /* AVL tree of COMDAT input sections */ 615 /* associated to output section */ 616 Word os_scnsymndx; /* index in output symtab of section */ 617 /* symbol for this section */ 618 Word os_txtndx; /* Index for section. Used to decide */ 619 /* where to insert section when */ 620 /* reordering sections */ 621 Xword os_szoutrels; /* size of output relocation section */ 622 uint_t os_namehash; /* hash on section name */ 623 uchar_t os_flags; /* various flags */ 624 }; 625 626 #define FLG_OS_KEY 0x01 /* section requires sort keys */ 627 #define FLG_OS_OUTREL 0x02 /* output rel against this section */ 628 #define FLG_OS_SECTREF 0x04 /* isps are not affected by -zignore */ 629 630 /* 631 * For sorting sections. 632 */ 633 struct sort_desc { 634 Is_desc **st_order; 635 Word st_ordercnt; 636 Is_desc **st_before; 637 Word st_beforecnt; 638 Is_desc **st_after; 639 Word st_aftercnt; 640 }; 641 642 struct sg_desc { /* output segment descriptor */ 643 Phdr sg_phdr; /* segment header for output file */ 644 const char *sg_name; /* segment name */ 645 Xword sg_round; /* data rounding required (mapfile) */ 646 Xword sg_length; /* maximum segment length; if 0 */ 647 /* segment is not specified */ 648 APlist *sg_osdescs; /* list of output section descriptors */ 649 APlist *sg_secorder; /* list specifying section ordering */ 650 /* for the segment */ 651 Half sg_flags; 652 Sym_desc *sg_sizesym; /* size symbol for this segment */ 653 Xword sg_addralign; /* LCM of sh_addralign */ 654 Elf_Scn *sg_fscn; /* the SCN of the first section. */ 655 }; 656 657 #define FLG_SG_VADDR 0x0001 /* vaddr segment attribute set */ 658 #define FLG_SG_PADDR 0x0002 /* paddr segment attribute set */ 659 #define FLG_SG_LENGTH 0x0004 /* length segment attribute set */ 660 #define FLG_SG_ALIGN 0x0008 /* align segment attribute set */ 661 #define FLG_SG_ROUND 0x0010 /* round segment attribute set */ 662 #define FLG_SG_FLAGS 0x0020 /* flags segment attribute set */ 663 #define FLG_SG_TYPE 0x0040 /* type segment attribute set */ 664 #define FLG_SG_ORDER 0x0080 /* has ordering been turned on for */ 665 /* this segment. */ 666 /* i.e. ?[O] option in mapfile */ 667 #define FLG_SG_NOHDR 0x0100 /* don't map ELF or phdrs into */ 668 /* this segment */ 669 #define FLG_SG_EMPTY 0x0200 /* an empty segment specification */ 670 /* no input sections will be */ 671 /* associated to this section */ 672 #define FLG_SG_KEY 0x0400 /* segment requires sort keys */ 673 #define FLG_SG_DISABLED 0x0800 /* this segment is disabled */ 674 #define FLG_SG_PHREQ 0x1000 /* this segment requires a program */ 675 /* header */ 676 677 struct sec_order { 678 const char *sco_secname; /* section name to be ordered */ 679 Word sco_index; /* ordering index for section */ 680 Half sco_flags; 681 }; 682 683 #define FLG_SGO_USED 0x0001 /* was ordering used? */ 684 685 struct ent_desc { /* input section entrance criteria */ 686 List ec_files; /* files from which to accept */ 687 /* sections */ 688 const char *ec_name; /* name to match (NULL if none) */ 689 Word ec_type; /* section type */ 690 Word ec_attrmask; /* section attribute mask (AWX) */ 691 Word ec_attrbits; /* sections attribute bits */ 692 Sg_desc *ec_segment; /* output segment to enter if matched */ 693 Word ec_ndx; /* index to determine where section */ 694 /* meeting this criteria should */ 695 /* inserted. Used for reordering */ 696 /* of sections. */ 697 Half ec_flags; 698 }; 699 700 #define FLG_EC_USED 0x0001 /* entrance criteria met? */ 701 702 /* 703 * Move supplementary structures 704 * Sorted by symbol local/global and then by name. 705 */ 706 typedef struct psym_info { 707 Sym_desc *psym_symd; /* partially initialized symbol */ 708 Word psym_num; /* number of move entires */ 709 Half psym_flag; /* various flag */ 710 List psym_mvs; /* the list of move entries */ 711 } Psym_info; 712 713 #define FLG_PSYM_OVERLAP 0x01 /* Overlapping */ 714 715 /* 716 * One structure is allocated for a move entry. 717 */ 718 typedef struct mv_itm { 719 Xword mv_start; /* start position */ 720 Xword mv_length; /* The length of initialization */ 721 Half mv_flag; /* various flags */ 722 Is_desc *mv_isp; /* input desc. this entry is from */ 723 Move *mv_ientry; /* Input Move_entry */ 724 Word mv_oidx; /* Output Move_entry index */ 725 } Mv_itm; 726 727 #define FLG_MV_OUTSECT 0x01 /* Will be in move section */ 728 729 /* 730 * Define a move descripter used within relocation structures. 731 */ 732 struct mv_desc { 733 Move *mvd_move; 734 Sym_desc *mvd_sym; 735 }; 736 737 struct sym_desc { 738 List sd_GOTndxs; /* list of associated GOT entries */ 739 Sym *sd_sym; /* pointer to symbol table entry */ 740 Sym *sd_osym; /* copy of the original symbol entry */ 741 /* used only for local partial */ 742 Psym_info *sd_psyminfo; /* for partial symbols, maintain a */ 743 /* pointer to parsym_info */ 744 const char *sd_name; /* symbols name */ 745 Ifl_desc *sd_file; /* file where symbol is taken */ 746 Is_desc *sd_isc; /* input section of symbol definition */ 747 Sym_aux *sd_aux; /* auxiliary global symbol info. */ 748 Word sd_symndx; /* index in output symbol table */ 749 Word sd_shndx; /* sect. index sym is associated w/ */ 750 Word sd_flags; /* state flags */ 751 Half sd_flags1; /* more symbol flags */ 752 Half sd_ref; /* reference definition of symbol */ 753 }; 754 755 /* 756 * The auxiliary symbol descriptor contains the additional information (beyond 757 * the symbol descriptor) required to process global symbols. These symbols are 758 * accessed via an internal symbol hash table where locality of reference is 759 * important for performance. 760 */ 761 struct sym_aux { 762 List sa_dfiles; /* files where symbol is defined */ 763 Sym sa_sym; /* copy of symtab entry */ 764 const char *sa_vfile; /* first unavailable definition */ 765 Ifl_desc *sa_bindto; /* symbol to bind to - for translator */ 766 const char *sa_rfile; /* file with first symbol referenced */ 767 Word sa_hash; /* the pure hash value of symbol */ 768 Word sa_PLTndx; /* index into PLT for symbol */ 769 Word sa_PLTGOTndx; /* GOT entry indx for PLT indirection */ 770 Word sa_linkndx; /* index of associated symbol from */ 771 /* ET_DYN file */ 772 Half sa_symspec; /* special symbol ids */ 773 Half sa_overndx; /* output file versioning index */ 774 Half sa_dverndx; /* dependency versioning index */ 775 }; 776 777 /* 778 * Nodes used to track symbols in the global AVL symbol dictionary. 779 */ 780 struct sym_avlnode { 781 avl_node_t sav_node; /* AVL node */ 782 Word sav_hash; /* symbol hash value */ 783 const char *sav_name; /* symbol name */ 784 Sym_desc *sav_symdesc; /* SymDesc entry */ 785 }; 786 787 /* 788 * These are the ids for processing of `Special symbols'. They are used 789 * to set the sym->sd_aux->sa_symspec field. 790 */ 791 #define SDAUX_ID_ETEXT 1 /* etext && _etext symbol */ 792 #define SDAUX_ID_EDATA 2 /* edata && _edata symbol */ 793 #define SDAUX_ID_END 3 /* end, _end, && _END_ symbol */ 794 #define SDAUX_ID_DYN 4 /* DYNAMIC && _DYNAMIC symbol */ 795 #define SDAUX_ID_PLT 5 /* _PROCEDURE_LINKAGE_TABLE_ symbol */ 796 #define SDAUX_ID_GOT 6 /* _GLOBAL_OFFSET_TABLE_ symbol */ 797 #define SDAUX_ID_START 7 /* START_ && _START_ symbol */ 798 799 /* 800 * Flags for sym_desc.sd_flags 801 */ 802 #define FLG_SY_MVTOCOMM 0x00000001 /* assign symbol to common (.bss) */ 803 /* this is a result of a */ 804 /* copy reloc against sym */ 805 #define FLG_SY_GLOBREF 0x00000002 /* a global reference has been seen */ 806 #define FLG_SY_WEAKDEF 0x00000004 /* a weak definition has been used */ 807 #define FLG_SY_CLEAN 0x00000008 /* `Sym' entry points to original */ 808 /* input file (read-only). */ 809 #define FLG_SY_UPREQD 0x00000010 /* symbol value update is required, */ 810 /* either it's used as an entry */ 811 /* point or for relocation, but */ 812 /* it must be updated even if */ 813 /* the -s flag is in effect */ 814 #define FLG_SY_NOTAVAIL 0x00000020 /* symbol is not available to the */ 815 /* application either because it */ 816 /* originates from an implicitly */ 817 /* referenced shared object, or */ 818 /* because it is not part of a */ 819 /* specified version. */ 820 #define FLG_SY_REDUCED 0x00000040 /* a global is reduced to local */ 821 #define FLG_SY_VERSPROM 0x00000080 /* version definition has been */ 822 /* promoted to output file */ 823 #define FLG_SY_PROT 0x00000100 /* stv_protected visibility seen */ 824 825 #define FLG_SY_MAPREF 0x00000200 /* symbol reference generated by user */ 826 /* from mapfile */ 827 #define FLG_SY_REFRSD 0x00000400 /* symbols sd_ref has been raised */ 828 /* due to a copy-relocs */ 829 /* weak-strong pairing */ 830 #define FLG_SY_INTPOSE 0x00000800 /* symbol defines an interposer */ 831 #define FLG_SY_INVALID 0x00001000 /* unwanted/erroneous symbol */ 832 #define FLG_SY_SMGOT 0x00002000 /* small got index assigned to symbol */ 833 /* sparc only */ 834 #define FLG_SY_PARENT 0x00004000 /* symbol to be found in parent */ 835 /* only used with direct bindings */ 836 #define FLG_SY_LAZYLD 0x00008000 /* symbol to cause lazyloading of */ 837 /* parent object */ 838 #define FLG_SY_ISDISC 0x00010000 /* symbol is a member of a DISCARDED */ 839 /* section (COMDAT) */ 840 #define FLG_SY_PAREXPN 0x00020000 /* partially init. symbol to be */ 841 /* expanded */ 842 #define FLG_SY_PLTPAD 0x00040000 /* pltpadding has been allocated for */ 843 /* this symbol */ 844 #define FLG_SY_REGSYM 0x00080000 /* REGISTER symbol (sparc only) */ 845 #define FLG_SY_SOFOUND 0x00100000 /* compared against an SO definition */ 846 #define FLG_SY_EXTERN 0x00200000 /* symbol is external, allows -zdefs */ 847 /* error suppression */ 848 #define FLG_SY_MAPUSED 0x00400000 /* mapfile symbol used (occurred */ 849 /* within a relocatable object) */ 850 #define FLG_SY_COMMEXP 0x00800000 /* COMMON symbol which has been */ 851 /* allocated */ 852 #define FLG_SY_CMDREF 0x01000000 /* symbol was referenced from the */ 853 /* command line. (ld -u <>, */ 854 /* ld -zrtldinfo=<>, ...) */ 855 #define FLG_SY_SPECSEC 0x02000000 /* section index is reserved value */ 856 /* ABS, COMMON, ... */ 857 #define FLG_SY_TENTSYM 0x04000000 /* tentative symbol */ 858 #define FLG_SY_VISIBLE 0x08000000 /* symbols visibility determined */ 859 #define FLG_SY_STDFLTR 0x10000000 /* symbol is a standard filter */ 860 #define FLG_SY_AUXFLTR 0x20000000 /* symbol is an auxiliary filter */ 861 #define FLG_SY_DYNSORT 0x40000000 /* req. in dyn[sym|tls]sort section */ 862 #define FLG_SY_NODYNSORT 0x80000000 /* excluded from dyn[sym_tls]sort sec */ 863 864 /* 865 * Sym_desc.sd_flags1 866 */ 867 #define FLG_SY1_DEFAULT 0x00000001 /* global symbol, default */ 868 #define FLG_SY1_SINGLE 0x00000002 /* global symbol, singleton defined */ 869 #define FLG_SY1_PROTECT 0x00000004 /* global symbol, protected defined */ 870 #define FLG_SY1_EXPORT 0x00000008 /* global symbol, exported defined */ 871 872 #define MSK_SY1_GLOBAL \ 873 (FLG_SY1_DEFAULT | FLG_SY1_SINGLE | FLG_SY1_PROTECT | FLG_SY1_EXPORT) 874 /* this mask indicates that the */ 875 /* symbol has been explicitly */ 876 /* defined within a mapfile */ 877 /* definition, and is a candidate */ 878 /* for versioning */ 879 880 #define FLG_SY1_HIDDEN 0x00000010 /* global symbol, reduce to local */ 881 #define FLG_SY1_ELIM 0x00000020 /* global symbol, eliminate */ 882 #define FLG_SY1_IGNORE 0x00000040 /* global symbol, ignored */ 883 884 #define MSK_SY1_LOCAL (FLG_SY1_HIDDEN | FLG_SY1_ELIM | FLG_SY1_IGNORE) 885 /* this mask allows all local state */ 886 /* flags to be removed when the */ 887 /* symbol is copy relocated */ 888 889 #define FLG_SY1_EXPDEF 0x00000100 /* symbol visibility defined */ 890 /* explicitly */ 891 892 #define MSK_SY1_NOAUTO (FLG_SY1_SINGLE | FLG_SY1_EXPORT | FLG_SY1_EXPDEF) 893 /* this mask indicates that the */ 894 /* symbol is not a candidate for */ 895 /* auto-reduction/elimination */ 896 897 #define FLG_SY1_MAPFILE 0x00000200 /* symbol attribute defined in a */ 898 /* mapfile */ 899 #define FLG_SY1_DIR 0x00000400 /* global symbol, direct bindings */ 900 #define FLG_SY1_NDIR 0x00000800 /* global symbol, nondirect bindings */ 901 902 /* 903 * Create a mask for (sym.st_other & visibility) since the gABI does not yet 904 * define a ELF*_ST_OTHER macro. 905 */ 906 #define MSK_SYM_VISIBILITY 0x7 907 908 /* 909 * Structure to manage the shared object definition lists. There are two lists 910 * that use this structure: 911 * 912 * o ofl_soneed; maintain the list of implicitly required dependencies 913 * (ie. shared objects needed by other shared objects). These definitions 914 * may include RPATH's required to locate the dependencies, and any 915 * version requirements. 916 * 917 * o ofl_socntl; maintains the shared object control definitions. These are 918 * provided by the user (via a mapfile) and are used to indicate any 919 * SONAME translations and verion control requirements. 920 */ 921 struct sdf_desc { 922 const char *sdf_name; /* the shared objects file name */ 923 const char *sdf_soname; /* the shared objects SONAME */ 924 char *sdf_rpath; /* library search path DT_RPATH */ 925 const char *sdf_rfile; /* referencing file for diagnostics */ 926 Ifl_desc *sdf_file; /* the final input file descriptor */ 927 List sdf_vers; /* list of versions that are required */ 928 /* from this object */ 929 List sdf_verneed; /* list of VERNEEDS to create for */ 930 /* this object (via SPECVERS or */ 931 /* ADDVERS) */ 932 Word sdf_flags; 933 }; 934 935 #define FLG_SDF_SONAME 0x02 /* An alternative SONAME is supplied */ 936 #define FLG_SDF_SELECT 0x04 /* version control selection required */ 937 #define FLG_SDF_VERIFY 0x08 /* version definition verification */ 938 /* required */ 939 #define FLG_SDF_SPECVER 0x10 /* specify VERNEEDS */ 940 #define FLG_SDF_ADDVER 0x20 /* add VERNEED references */ 941 942 /* 943 * Structure to manage shared object version usage requirements. 944 */ 945 struct sdv_desc { 946 const char *sdv_name; /* version name */ 947 const char *sdv_ref; /* versions reference */ 948 Word sdv_flags; /* flags */ 949 }; 950 951 #define FLG_SDV_MATCHED 0x01 /* VERDEF found and matched */ 952 953 /* 954 * Structures to manage versioning information. Two versioning structures are 955 * defined: 956 * 957 * o a version descriptor maintains a linked list of versions and their 958 * associated dependencies. This is used to build the version definitions 959 * for an image being created (see map_symbol), and to determine the 960 * version dependency graph for any input files that are versioned. 961 * 962 * o a version index array contains each version of an input file that is 963 * being processed. It informs us which versions are available for 964 * binding, and is used to generate any version dependency information. 965 */ 966 struct ver_desc { 967 const char *vd_name; /* version name */ 968 Word vd_hash; /* hash value of name */ 969 Ifl_desc *vd_file; /* file that defined version */ 970 Half vd_ndx; /* coordinates with symbol index */ 971 Half vd_flags; /* version information */ 972 List vd_deps; /* version dependencies */ 973 Ver_desc *vd_ref; /* dependency's first reference */ 974 }; 975 976 struct ver_index { 977 const char *vi_name; /* dependency version name */ 978 Half vi_flags; /* communicates availability */ 979 Half vi_overndx; /* Index asssigned to this version in */ 980 /* output object Verneed section */ 981 Ver_desc *vi_desc; /* cross reference to descriptor */ 982 }; 983 984 /* 985 * Define any internal version descriptor flags ([vd|vi]_flags). Note that the 986 * first byte is reserved for user visible flags (refer VER_FLG's in link.h). 987 */ 988 #define MSK_VER_USER 0x0f /* mask for user visible flags */ 989 990 #define FLG_VER_AVAIL 0x10 /* version is available for binding */ 991 #define FLG_VER_REFER 0x20 /* version has been referenced */ 992 #define FLG_VER_SPECVER 0x40 /* via $SPECVERS in mapfile. */ 993 /* Cannot be normalized away */ 994 #define FLG_VER_CYCLIC 0x80 /* a member of cyclic dependency */ 995 996 /* 997 * isalist(1) descriptor - used to break an isalist string into its component 998 * options. 999 */ 1000 struct isa_opt { 1001 char *isa_name; /* individual isa option name */ 1002 size_t isa_namesz; /* and associated size */ 1003 }; 1004 1005 struct isa_desc { 1006 char *isa_list; /* sysinfo(SI_ISALIST) list */ 1007 size_t isa_listsz; /* and associated size */ 1008 Isa_opt *isa_opt; /* table of individual isa options */ 1009 size_t isa_optno; /* and associated number */ 1010 }; 1011 1012 /* 1013 * uname(2) descriptor - used to break a utsname structure into its component 1014 * options (at least those that we're interested in). 1015 */ 1016 struct uts_desc { 1017 char *uts_osname; /* operating system name */ 1018 size_t uts_osnamesz; /* and associated size */ 1019 char *uts_osrel; /* operating system release */ 1020 size_t uts_osrelsz; /* and associated size */ 1021 }; 1022 1023 /* 1024 * SHT_GROUP descriptor - used to track group sections at the global 1025 * level to resolve conflicts and determine which to keep. 1026 */ 1027 struct group_desc { 1028 Is_desc *gd_isc; /* input section descriptor */ 1029 Is_desc *gd_oisc; /* overriding input section */ 1030 /* descriptor when discarded */ 1031 const char *gd_name; /* group name (signature symbol) */ 1032 Word *gd_data; /* data for group section */ 1033 size_t gd_cnt; /* number of entries in group data */ 1034 }; 1035 1036 /* 1037 * Indexes into the ld_support_funcs[] table. 1038 */ 1039 typedef enum { 1040 LDS_VERSION = 0, /* Must be first and have value 0 */ 1041 LDS_INPUT_DONE, 1042 LDS_START, 1043 LDS_ATEXIT, 1044 LDS_OPEN, 1045 LDS_FILE, 1046 LDS_INSEC, 1047 LDS_SEC, 1048 LDS_NUM 1049 } Support_ndx; 1050 1051 /* 1052 * Structure to manage archive member caching. Each archive has an archive 1053 * descriptor (Ar_desc) associated with it. This contains pointers to the 1054 * archive symbol table (obtained by elf_getarsyms(3e)) and an auxiliary 1055 * structure (Ar_uax[]) that parallels this symbol table. The member element 1056 * of this auxiliary table indicates whether the archive member associated with 1057 * the symbol offset has already been extracted (AREXTRACTED) or partially 1058 * processed (refer process_member()). 1059 */ 1060 typedef struct ar_mem { 1061 Elf *am_elf; /* elf descriptor for this member */ 1062 char *am_name; /* members name */ 1063 char *am_path; /* path (ie. lib(foo.o)) */ 1064 Sym *am_syms; /* start of global symbols */ 1065 char *am_strs; /* associated string table start */ 1066 Xword am_symn; /* no. of global symbols */ 1067 } Ar_mem; 1068 1069 typedef struct ar_aux { 1070 Sym_desc *au_syms; /* internal symbol descriptor */ 1071 Ar_mem *au_mem; /* associated member */ 1072 } Ar_aux; 1073 1074 #define FLG_ARMEM_PROC (Ar_mem *)-1 1075 1076 typedef struct ar_desc { 1077 const char *ad_name; /* archive file name */ 1078 Elf *ad_elf; /* elf descriptor for the archive */ 1079 Elf_Arsym *ad_start; /* archive symbol table start */ 1080 Ar_aux *ad_aux; /* auxiliary symbol information */ 1081 dev_t ad_stdev; /* device id and inode number for */ 1082 ino_t ad_stino; /* multiple inclusion checks */ 1083 ofl_flag_t ad_flags; /* archive specific cmd line flags */ 1084 } Ar_desc; 1085 1086 /* 1087 * Define any archive descriptor flags. NOTE, make sure they do not clash with 1088 * any output file descriptor archive extraction flags, as these are saved in 1089 * the same entry (see MSK_OF1_ARCHIVE). 1090 */ 1091 #define FLG_ARD_EXTRACT 0x00010000 /* archive member has been extracted */ 1092 1093 /* 1094 * Function Declarations. 1095 */ 1096 #if defined(_ELF64) 1097 1098 #define ld_create_outfile ld64_create_outfile 1099 #define ld_ent_setup ld64_ent_setup 1100 #define ld_init_strings ld64_init_strings 1101 #define ld_init_target ld64_init_target 1102 #define ld_make_sections ld64_make_sections 1103 #define ld_main ld64_main 1104 #define ld_ofl_cleanup ld64_ofl_cleanup 1105 #define ld_process_mem ld64_process_mem 1106 #define ld_reloc_init ld64_reloc_init 1107 #define ld_reloc_process ld64_reloc_process 1108 #define ld_sym_validate ld64_sym_validate 1109 #define ld_update_outfile ld64_update_outfile 1110 1111 #else 1112 1113 #define ld_create_outfile ld32_create_outfile 1114 #define ld_ent_setup ld32_ent_setup 1115 #define ld_init_strings ld32_init_strings 1116 #define ld_init_target ld32_init_target 1117 #define ld_make_sections ld32_make_sections 1118 #define ld_main ld32_main 1119 #define ld_ofl_cleanup ld32_ofl_cleanup 1120 #define ld_process_mem ld32_process_mem 1121 #define ld_reloc_init ld32_reloc_init 1122 #define ld_reloc_process ld32_reloc_process 1123 #define ld_sym_validate ld32_sym_validate 1124 #define ld_update_outfile ld32_update_outfile 1125 1126 #endif 1127 1128 extern int ld_getopt(Lm_list *, int, int, char **); 1129 1130 extern int ld32_main(int, char **, Half); 1131 extern int ld64_main(int, char **, Half); 1132 1133 extern uintptr_t ld_create_outfile(Ofl_desc *); 1134 extern uintptr_t ld_ent_setup(Ofl_desc *, Xword); 1135 extern uintptr_t ld_init_strings(Ofl_desc *); 1136 extern int ld_init_target(Lm_list *, Half mach); 1137 extern uintptr_t ld_make_sections(Ofl_desc *); 1138 extern void ld_ofl_cleanup(Ofl_desc *); 1139 extern Ifl_desc *ld_process_mem(const char *, const char *, char *, 1140 size_t, Ofl_desc *, Rej_desc *); 1141 extern uintptr_t ld_reloc_init(Ofl_desc *); 1142 extern uintptr_t ld_reloc_process(Ofl_desc *); 1143 extern uintptr_t ld_sym_validate(Ofl_desc *); 1144 extern uintptr_t ld_update_outfile(Ofl_desc *); 1145 1146 #ifdef __cplusplus 1147 } 1148 #endif 1149 1150 #endif /* _LIBLD_H */ 1151