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 2008 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 /* 105 * GOT reference models 106 */ 107 typedef enum { 108 GOT_REF_GENERIC, /* generic symbol reference */ 109 GOT_REF_TLSIE, /* TLS initial exec (gnu) reference */ 110 GOT_REF_TLSLD, /* TLS local dynamic reference */ 111 GOT_REF_TLSGD /* TLS general dynamic reference */ 112 } Gotref; 113 114 typedef struct { 115 Xword gn_addend; /* addend associated with GOT entry */ 116 Sword gn_gotndx; /* GOT table index */ 117 Gotref gn_gotref; 118 } Gotndx; 119 120 /* 121 * Got debugging structure. The got index is defined as a signed value as we 122 * do so much mucking around with negative and positive gots on SPARC, and sign 123 * extension is necessary when building 64-bit objects. On intel we explicitly 124 * cast this variable to an unsigned value. 125 */ 126 typedef struct { 127 Sym_desc * gt_sym; 128 Gotndx gt_gndx; 129 } Gottable; 130 131 132 /* 133 * Output file processing structure 134 */ 135 typedef Lword ofl_flag_t; 136 struct ofl_desc { 137 char *ofl_sgsid; /* link-editor identification */ 138 const char *ofl_name; /* full file name */ 139 Elf *ofl_elf; /* elf_memory() elf descriptor */ 140 Elf *ofl_welf; /* ELF_C_WRITE elf descriptor */ 141 Ehdr *ofl_dehdr; /* default elf header, and new elf */ 142 Ehdr *ofl_nehdr; /* header describing this file */ 143 Phdr *ofl_phdr; /* program header descriptor */ 144 Phdr *ofl_tlsphdr; /* TLS phdr */ 145 int ofl_fd; /* file descriptor */ 146 size_t ofl_size; /* image size */ 147 List ofl_maps; /* list of input mapfiles */ 148 List ofl_segs; /* list of segments */ 149 List ofl_ents; /* list of entrance descriptors */ 150 List ofl_objs; /* relocatable object file list */ 151 Word ofl_objscnt; /* and count */ 152 List ofl_ars; /* archive library list */ 153 Word ofl_arscnt; /* and count */ 154 int ofl_ars_gsandx; /* archive group argv index. 0 means */ 155 /* no current group, < 0 means */ 156 /* error reported. >0 is cur ndx */ 157 Word ofl_ars_gsndx; /* current -zrescan-start ofl_ars ndx */ 158 List ofl_sos; /* shared object list */ 159 Word ofl_soscnt; /* and count */ 160 List ofl_soneed; /* list of implicitly required .so's */ 161 List ofl_socntl; /* list of .so control definitions */ 162 List ofl_outrels; /* list of output relocations */ 163 Word ofl_outrelscnt; /* and count */ 164 List ofl_actrels; /* list of relocations to perform */ 165 Word ofl_actrelscnt; /* and count */ 166 Word ofl_entrelscnt; /* no of relocations entered */ 167 List ofl_copyrels; /* list of copy relocations */ 168 List ofl_ordered; /* list of shf_ordered sections */ 169 List ofl_syminfsyms; /* list of interesting syms */ 170 /* for syminfo processing */ 171 List ofl_ismove; /* list of .SUNW_move sections */ 172 List ofl_mvrelisdescs; /* list of relocation input section */ 173 /* targeting to expanded area */ 174 List ofl_parsym; /* list of Parsym_info */ 175 List ofl_extrarels; /* relocation sections which have */ 176 /* a NULL sh_info */ 177 avl_tree_t *ofl_groups; /* pointer to head of Groups AVL tree */ 178 List ofl_initarray; /* list of init array func names */ 179 List ofl_finiarray; /* list of fini array func names */ 180 List ofl_preiarray; /* list of preinit array func names */ 181 List ofl_rtldinfo; /* list of rtldinfo syms */ 182 List ofl_osgroups; /* list of output GROUP sections */ 183 List ofl_ostlsseg; /* pointer to sections in TLS segment */ 184 #if defined(_ELF64) /* for amd64 target only */ 185 List ofl_unwind; /* list of unwind output sections */ 186 Os_desc *ofl_unwindhdr; /* Unwind hdr */ 187 #endif 188 avl_tree_t ofl_symavl; /* pointer to head of Syms AVL tree */ 189 Sym_desc **ofl_regsyms; /* array of potential register */ 190 Word ofl_regsymsno; /* symbols and array count */ 191 Word ofl_regsymcnt; /* no. of output register symbols */ 192 Word ofl_lregsymcnt; /* no. of local register symbols */ 193 Sym_desc *ofl_dtracesym; /* ld -zdtrace= */ 194 ofl_flag_t ofl_flags; /* various state bits, args etc. */ 195 ofl_flag_t ofl_flags1; /* more flags */ 196 Xword ofl_segorigin; /* segment origin (start) */ 197 void *ofl_entry; /* entry point (-e and Sym_desc *) */ 198 char *ofl_filtees; /* shared objects we are a filter for */ 199 const char *ofl_soname; /* (-h option) output file name for */ 200 /* dynamic structure */ 201 const char *ofl_interp; /* interpreter name used by exec() */ 202 char *ofl_rpath; /* run path to store in .dynamic */ 203 char *ofl_config; /* config path to store in .dynamic */ 204 List ofl_ulibdirs; /* user supplied library search list */ 205 List ofl_dlibdirs; /* default library search list */ 206 Word ofl_vercnt; /* number of versions to generate */ 207 List ofl_verdesc; /* list of version descriptors */ 208 size_t ofl_verdefsz; /* size of version definition section */ 209 size_t ofl_verneedsz; /* size of version needed section */ 210 Word ofl_entercnt; /* no. of global symbols entered */ 211 Word ofl_globcnt; /* no. of global symbols to output */ 212 Word ofl_scopecnt; /* no. of scoped symbols to output */ 213 Word ofl_dynscopecnt; /* no. scoped syms in .SUNW_ldynsym */ 214 Word ofl_elimcnt; /* no. of eliminated symbols */ 215 Word ofl_locscnt; /* no. of local symbols in .symtab */ 216 Word ofl_dynlocscnt; /* no. local symbols in .SUNW_ldynsym */ 217 Word ofl_dynsymsortcnt; /* no. ndx in .SUNW_dynsymsort */ 218 Word ofl_dyntlssortcnt; /* no. ndx in .SUNW_dyntlssort */ 219 Word ofl_dynshdrcnt; /* no. of output section in .dynsym */ 220 Word ofl_shdrcnt; /* no. of output sections */ 221 Str_tbl *ofl_shdrsttab; /* Str_tbl for shdr strtab */ 222 Str_tbl *ofl_strtab; /* Str_tbl for symtab strtab */ 223 Str_tbl *ofl_dynstrtab; /* Str_tbl for dymsym strtab */ 224 Gotndx *ofl_tlsldgotndx; /* index to LD TLS_index structure */ 225 Xword ofl_relocsz; /* size of output relocations */ 226 Xword ofl_relocgotsz; /* size of .got relocations */ 227 Xword ofl_relocpltsz; /* size of .plt relocations */ 228 Xword ofl_relocbsssz; /* size of .bss (copy) relocations */ 229 Xword ofl_relocrelsz; /* size of .rel[a] relocations */ 230 Word ofl_relocincnt; /* no. of input relocations */ 231 Word ofl_reloccnt; /* tot number of output relocations */ 232 Word ofl_reloccntsub; /* tot numb of output relocations to */ 233 /* skip (-zignore) */ 234 Word ofl_relocrelcnt; /* tot number of relative */ 235 /* relocations */ 236 Word ofl_gotcnt; /* no. of .got entries */ 237 Word ofl_pltcnt; /* no. of .plt entries */ 238 Word ofl_pltpad; /* no. of .plt padd entries */ 239 Word ofl_hashbkts; /* no. of hash buckets required */ 240 Is_desc *ofl_isbss; /* .bss input section (globals) */ 241 Is_desc *ofl_islbss; /* .lbss input section (globals) */ 242 Is_desc *ofl_istlsbss; /* .tlsbss input section (globals) */ 243 Is_desc *ofl_isparexpn; /* -z nopartial .data input section */ 244 Os_desc *ofl_osdynamic; /* .dynamic output section */ 245 Os_desc *ofl_osdynsym; /* .dynsym output section */ 246 Os_desc *ofl_osldynsym; /* .SUNW_ldynsym output section */ 247 Os_desc *ofl_osdynstr; /* .dynstr output section */ 248 Os_desc *ofl_osdynsymsort; /* .SUNW_dynsymsort output section */ 249 Os_desc *ofl_osdyntlssort; /* .SUNW_dyntlssort output section */ 250 Os_desc *ofl_osgot; /* .got output section */ 251 Os_desc *ofl_oshash; /* .hash output section */ 252 Os_desc *ofl_osinitarray; /* .initarray output section */ 253 Os_desc *ofl_osfiniarray; /* .finiarray output section */ 254 Os_desc *ofl_ospreinitarray; /* .preinitarray output section */ 255 Os_desc *ofl_osinterp; /* .interp output section */ 256 Os_desc *ofl_oscap; /* .SUNW_cap output section */ 257 Os_desc *ofl_osplt; /* .plt output section */ 258 Os_desc *ofl_osmove; /* .SUNW_move output section */ 259 Os_desc *ofl_osrelhead; /* first relocation section */ 260 Os_desc *ofl_osrel; /* .rel[a] relocation section */ 261 Os_desc *ofl_osshstrtab; /* .shstrtab output section */ 262 Os_desc *ofl_osstrtab; /* .strtab output section */ 263 Os_desc *ofl_ossymtab; /* .symtab output section */ 264 Os_desc *ofl_ossymshndx; /* .symtab_shndx output section */ 265 Os_desc *ofl_osdynshndx; /* .dynsym_shndx output section */ 266 Os_desc *ofl_osldynshndx; /* .SUNW_ldynsym_shndx output sec */ 267 Os_desc *ofl_osverdef; /* .version definition output section */ 268 Os_desc *ofl_osverneed; /* .version needed output section */ 269 Os_desc *ofl_osversym; /* .version symbol ndx output section */ 270 Word ofl_dtflags_1; /* DT_FLAGS_1 entries */ 271 Word ofl_dtflags; /* DT_FLAGS entries */ 272 Os_desc *ofl_ossyminfo; /* .SUNW_syminfo output section */ 273 Half ofl_parexpnndx; /* -z nopartial section index */ 274 /* Ref. at perform_outreloc() in */ 275 /* libld/{mach}/machrel.c */ 276 Xword *ofl_checksum; /* DT_CHECKSUM value address */ 277 char *ofl_depaudit; /* dependency auditing required (-P) */ 278 char *ofl_audit; /* object auditing required (-p) */ 279 Alist *ofl_symfltrs; /* per-symbol filtees and their */ 280 Alist *ofl_dtsfltrs; /* associated .dynamic/.dynstrs */ 281 Xword ofl_hwcap_1; /* hardware capabilities */ 282 Xword ofl_sfcap_1; /* software capabilities */ 283 Lm_list *ofl_lml; /* runtime link-map list */ 284 Gottable *ofl_gottable; /* debugging got information */ 285 }; 286 287 #define FLG_OF_DYNAMIC 0x00000001 /* generate dynamic output module */ 288 #define FLG_OF_STATIC 0x00000002 /* generate static output module */ 289 #define FLG_OF_EXEC 0x00000004 /* generate an executable */ 290 #define FLG_OF_RELOBJ 0x00000008 /* generate a relocatable object */ 291 #define FLG_OF_SHAROBJ 0x00000010 /* generate a shared object */ 292 #define FLG_OF_BFLAG 0x00000020 /* do no special plt building: -b */ 293 #define FLG_OF_IGNENV 0x00000040 /* ignore LD_LIBRARY_PATH: -i */ 294 #define FLG_OF_STRIP 0x00000080 /* strip output: -s */ 295 #define FLG_OF_NOWARN 0x00000100 /* disable symbol warnings: -t */ 296 #define FLG_OF_NOUNDEF 0x00000200 /* allow no undefined symbols: -zdefs */ 297 #define FLG_OF_PURETXT 0x00000400 /* allow no text relocations: -ztext */ 298 #define FLG_OF_GENMAP 0x00000800 /* generate a memory map: -m */ 299 #define FLG_OF_DYNLIBS 0x00001000 /* dynamic input allowed: -Bdynamic */ 300 #define FLG_OF_SYMBOLIC 0x00002000 /* bind global symbols: -Bsymbolic */ 301 #define FLG_OF_ADDVERS 0x00004000 /* add version stamp: -Qy */ 302 #define FLG_OF_NOLDYNSYM 0x00008000 /* -znoldynsym set */ 303 #define FLG_OF_SEGORDER 0x00010000 /* segment ordering is required */ 304 #define FLG_OF_SEGSORT 0x00020000 /* segment sorting is required */ 305 #define FLG_OF_TEXTREL 0x00040000 /* text relocations have been found */ 306 #define FLG_OF_MULDEFS 0x00080000 /* multiple symbols are allowed */ 307 #define FLG_OF_TLSPHDR 0x00100000 /* a TLS program header is required */ 308 #define FLG_OF_BLDGOT 0x00200000 /* build GOT table */ 309 #define FLG_OF_VERDEF 0x00400000 /* record version definitions */ 310 #define FLG_OF_VERNEED 0x00800000 /* record version dependencies */ 311 #define FLG_OF_NOVERSEC 0x01000000 /* don't record version sections */ 312 #define FLG_OF_KEY 0x02000000 /* file requires sort keys */ 313 #define FLG_OF_PROCRED 0x04000000 /* process any symbol reductions by */ 314 /* effecting the symbol table */ 315 /* output and relocations */ 316 #define FLG_OF_SYMINFO 0x08000000 /* create a syminfo section */ 317 #define FLG_OF_AUX 0x10000000 /* ofl_filter is an auxiliary filter */ 318 #define FLG_OF_FATAL 0x20000000 /* fatal error during input */ 319 #define FLG_OF_WARN 0x40000000 /* warning during input processing. */ 320 #define FLG_OF_VERBOSE 0x80000000 /* -z verbose flag set */ 321 322 #define FLG_OF_MAPSYMB 0x000100000000 /* symbolic scope definition seen */ 323 #define FLG_OF_MAPGLOB 0x000200000000 /* global scope definition seen */ 324 #define FLG_OF_COMREL 0x000400000000 /* -z combreloc set, which enables */ 325 /* DT_RELACNT tracking, */ 326 #define FLG_OF_NOCOMREL 0x000800000000 /* -z nocombreloc set */ 327 #define FLG_OF_AUTOLCL 0x001000000000 /* automatically reduce unspecified */ 328 /* global symbols to locals */ 329 #define FLG_OF_AUTOELM 0x002000000000 /* automatically eliminate */ 330 /* unspecified global symbols */ 331 #define FLG_OF_REDLSYM 0x004000000000 /* reduce local symbols */ 332 #define FLG_OF_SECORDER 0x008000000000 /* section ordering is required */ 333 334 /* 335 * In the flags1 arena, establish any options that are applicable to archive 336 * extraction first, and associate a mask. These values are recorded with any 337 * archive descriptor so that they may be reset should the archive require a 338 * rescan to try and resolve undefined symbols. 339 */ 340 #define FLG_OF1_ALLEXRT 0x00000001 /* extract all members from an */ 341 /* archive file */ 342 #define FLG_OF1_WEAKEXT 0x00000002 /* allow archive extraction to */ 343 /* resolve weak references */ 344 #define MSK_OF1_ARCHIVE 0x00000003 /* archive flags mask */ 345 346 #define FLG_OF1_NOINTRP 0x00000008 /* -z nointerp flag set */ 347 #define FLG_OF1_ZDIRECT 0x00000010 /* -z direct flag set */ 348 #define FLG_OF1_NDIRECT 0x00000020 /* no-direct bindings specified */ 349 #define FLG_OF1_OVHWCAP 0x00000040 /* override any input hardware or */ 350 #define FLG_OF1_OVSFCAP 0x00000080 /* software capabilities */ 351 #define FLG_OF1_RELDYN 0x00000100 /* process .dynamic in rel obj */ 352 #define FLG_OF1_NRLXREL 0x00000200 /* -z norelaxreloc flag set */ 353 #define FLG_OF1_RLXREL 0x00000400 /* -z relaxreloc flag set */ 354 #define FLG_OF1_IGNORE 0x00000800 /* ignore unused dependencies */ 355 356 #define FLG_OF1_TEXTOFF 0x00002000 /* text relocations are ok */ 357 #define FLG_OF1_ABSEXEC 0x00004000 /* -zabsexec set */ 358 #define FLG_OF1_LAZYLD 0x00008000 /* lazy loading of objects enabled */ 359 #define FLG_OF1_GRPPRM 0x00010000 /* dependencies are to have */ 360 /* GROUPPERM enabled */ 361 #define FLG_OF1_OVRFLW 0x00020000 /* size exceeds 32-bit limitation */ 362 /* of 32-bit libld */ 363 #define FLG_OF1_NOPARTI 0x00040000 /* -znopartial set */ 364 #define FLG_OF1_BSSOREL 0x00080000 /* output relocation against bss */ 365 /* section */ 366 #define FLG_OF1_TLSOREL 0x00100000 /* output relocation against .tlsbss */ 367 /* section */ 368 #define FLG_OF1_MEMORY 0x00200000 /* produce a memory model */ 369 370 #define FLG_OF1_ENCDIFF 0x00800000 /* Host running linker has different */ 371 /* byte order than output object */ 372 #define FLG_OF1_VADDR 0x01000000 /* vaddr was explicitly set */ 373 #define FLG_OF1_EXTRACT 0x02000000 /* archive member has been extracted */ 374 #define FLG_OF1_RESCAN 0x04000000 /* any archives should be rescanned */ 375 #define FLG_OF1_IGNPRC 0x08000000 /* ignore processing required */ 376 #define FLG_OF1_NCSTTAB 0x10000000 /* -znocompstrtab set */ 377 #define FLG_OF1_DONE 0x20000000 /* link-editor processing complete */ 378 #define FLG_OF1_NONREG 0x40000000 /* non-regular file specified as */ 379 /* the output file */ 380 #define FLG_OF1_ALNODIR 0x80000000 /* establish NODIRECT for all */ 381 /* exported interfaces. */ 382 383 /* 384 * Test to see if the output file would allow the presence of 385 * a .dynsym section. 386 */ 387 #define OFL_ALLOW_DYNSYM(_ofl) (((_ofl)->ofl_flags & \ 388 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == FLG_OF_DYNAMIC) 389 390 /* 391 * Test to see if the output file would allow the presence of 392 * a .SUNW_ldynsym section. The requirements are that a .dynsym 393 * is allowed, and -znoldynsym has not been specified. Note that 394 * even if the answer is True (1), we will only generate one if there 395 * are local symbols that require it. 396 */ 397 #define OFL_ALLOW_LDYNSYM(_ofl) (((_ofl)->ofl_flags & \ 398 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ | FLG_OF_NOLDYNSYM)) == FLG_OF_DYNAMIC) 399 400 /* 401 * Test to see if relocation processing should be done. This is normally 402 * true, but can be disabled via the '-z noreloc' option. Note that 403 * relocatable objects are still relocated even if '-z noreloc' is present. 404 */ 405 #define OFL_DO_RELOC(_ofl) (((_ofl)->ofl_flags & FLG_OF_RELOBJ) || \ 406 !((_ofl)->ofl_dtflags_1 & DF_1_NORELOC)) 407 408 /* 409 * Relocation (active & output) processing structure - transparent to common 410 * code. 411 * 412 * Note that rel_raddend is primarily only of interest to RELA relocations, 413 * and is set to 0 for REL. However, there is an exception: If FLG_REL_NADDEND 414 * is set, then rel_raddend contains a replacement value for the implicit 415 * addend found in the relocation target. 416 */ 417 struct rel_desc { 418 Os_desc *rel_osdesc; /* output section reloc is against */ 419 Is_desc *rel_isdesc; /* input section reloc is against */ 420 const char *rel_sname; /* symbol name (may be "unknown") */ 421 Sym_desc *rel_sym; /* sym relocation is against */ 422 Sym_desc *rel_usym; /* strong sym if this is a weak pair */ 423 Mv_desc *rel_move; /* move table information */ 424 Word rel_flags; /* misc. flags for relocations */ 425 Word rel_rtype; /* relocation type */ 426 Xword rel_roffset; /* relocation offset */ 427 Sxword rel_raddend; /* addend from input relocation */ 428 Word rel_typedata; /* ELF_R_TYPE_DATA(info) */ 429 }; 430 431 /* 432 * common flags used on the Rel_desc structure (defined in machrel.h). 433 */ 434 #define FLG_REL_GOT 0x00000001 /* relocation against GOT */ 435 #define FLG_REL_PLT 0x00000002 /* relocation against PLT */ 436 #define FLG_REL_BSS 0x00000004 /* relocation against BSS */ 437 #define FLG_REL_LOAD 0x00000008 /* section loadable */ 438 #define FLG_REL_SCNNDX 0x00000010 /* use section index for symbol ndx */ 439 #define FLG_REL_CLVAL 0x00000020 /* clear VALUE for active relocation */ 440 #define FLG_REL_ADVAL 0x00000040 /* add VALUE for output relocation, */ 441 /* only relevant to SPARC and */ 442 /* R_SPARC_RELATIVE */ 443 #define FLG_REL_GOTCL 0x00000080 /* clear the GOT entry. This is */ 444 /* relevant to RELA relocations, */ 445 /* not REL (i386) relocations */ 446 #define FLG_REL_MOVETAB 0x00000100 /* Relocation against .SUNW_move */ 447 /* adjustments required before */ 448 /* actual relocation */ 449 #define FLG_REL_NOINFO 0x00000200 /* Relocation comes from a section */ 450 /* with a null sh_info field */ 451 #define FLG_REL_REG 0x00000400 /* Relocation target is reg sym */ 452 #define FLG_REL_FPTR 0x00000800 /* relocation against func. desc. */ 453 #define FLG_REL_RFPTR1 0x00001000 /* Relative relocation against */ 454 /* 1st part of FD */ 455 #define FLG_REL_RFPTR2 0x00002000 /* Relative relocation against */ 456 /* 2nd part of FD */ 457 #define FLG_REL_DISP 0x00004000 /* *disp* relocation */ 458 #define FLG_REL_STLS 0x00008000 /* IE TLS reference to */ 459 /* static TLS GOT index */ 460 #define FLG_REL_DTLS 0x00010000 /* GD TLS reference relative to */ 461 /* dynamic TLS GOT index */ 462 #define FLG_REL_MTLS 0x00020000 /* LD TLS reference against GOT */ 463 #define FLG_REL_STTLS 0x00040000 /* LE TLS reference directly */ 464 /* to static tls index */ 465 #define FLG_REL_TLSFIX 0x00080000 /* relocation points to TLS instr. */ 466 /* which needs updating */ 467 #define FLG_REL_RELA 0x00100000 /* descripter captures a Rela */ 468 #define FLG_REL_GOTFIX 0x00200000 /* relocation points to GOTOP instr. */ 469 /* which needs updating */ 470 #define FLG_REL_NADDEND 0x00400000 /* Replace implicit addend in dest */ 471 /* with value in rel_raddend */ 472 /* Relevant to REL (i386) */ 473 /* relocations, not to RELA. */ 474 475 /* 476 * Structure to hold a cache of Relocations. 477 */ 478 struct rel_cache { 479 Rel_desc *rc_end; 480 Rel_desc *rc_free; 481 }; 482 483 /* 484 * Symbol value descriptor. For relocatable objects, each symbols value is 485 * its offset within its associated section. Therefore, to uniquely define 486 * each symbol within a reloctable object, record and sort the sh_offset and 487 * symbol value. This information is used to seach for displacement 488 * relocations as part of copy relocation validation. 489 */ 490 typedef struct { 491 Addr ssv_value; 492 Sym_desc *ssv_sdp; 493 } Ssv_desc; 494 495 /* 496 * Input file processing structures. 497 */ 498 struct ifl_desc { /* input file descriptor */ 499 const char *ifl_name; /* full file name */ 500 const char *ifl_soname; /* shared object name */ 501 dev_t ifl_stdev; /* device id and inode number for .so */ 502 ino_t ifl_stino; /* multiple inclusion checks */ 503 Ehdr *ifl_ehdr; /* elf header describing this file */ 504 Elf *ifl_elf; /* elf descriptor for this file */ 505 Sym_desc **ifl_oldndx; /* original symbol table indices */ 506 Sym_desc *ifl_locs; /* symbol desc version of locals */ 507 Ssv_desc *ifl_sortsyms; /* sorted list of symbols by value */ 508 Word ifl_locscnt; /* no. of local symbols to process */ 509 Word ifl_symscnt; /* total no. of symbols to process */ 510 Word ifl_sortcnt; /* no. of sorted symbols to process */ 511 Word ifl_shnum; /* number of sections in file */ 512 Word ifl_shstrndx; /* index to .shstrtab */ 513 Word ifl_vercnt; /* number of versions in file */ 514 Is_desc **ifl_isdesc; /* isdesc[scn ndx] = Is_desc ptr */ 515 Sdf_desc *ifl_sdfdesc; /* control definition */ 516 Versym *ifl_versym; /* version symbol table array */ 517 Ver_index *ifl_verndx; /* verndx[ver ndx] = Ver_index */ 518 List ifl_verdesc; /* version descriptor list */ 519 List ifl_relsect; /* relocation section list */ 520 Alist *ifl_groups; /* SHT_GROUP section list */ 521 Half ifl_neededndx; /* index to NEEDED in .dyn section */ 522 Word ifl_flags; /* Explicit/implicit reference */ 523 }; 524 525 #define FLG_IF_CMDLINE 0x00000001 /* full filename specified from the */ 526 /* command line (no -l) */ 527 #define FLG_IF_NEEDED 0x00000002 /* shared object should be recorded */ 528 #define FLG_IF_DIRECT 0x00000004 /* establish direct bindings to this */ 529 /* object */ 530 #define FLG_IF_EXTRACT 0x00000008 /* file extracted from an archive */ 531 #define FLG_IF_VERNEED 0x00000010 /* version dependency information is */ 532 /* required */ 533 #define FLG_IF_DEPREQD 0x00000020 /* dependency is required to satisfy */ 534 /* symbol references */ 535 #define FLG_IF_NEEDSTR 0x00000040 /* dependency specified by -Nn */ 536 /* flag */ 537 #define FLG_IF_IGNORE 0x00000080 /* ignore unused dependencies */ 538 #define FLG_IF_NODIRECT 0x00000100 /* object contains symbols that */ 539 /* cannot be directly bound to. */ 540 #define FLG_IF_LAZYLD 0x00000200 /* bindings to this object should be */ 541 /* lazy loaded */ 542 #define FLG_IF_GRPPRM 0x00000400 /* this dependency should have the */ 543 /* DF_P1_GROUPPERM flag set */ 544 #define FLG_IF_DISPPEND 0x00000800 /* displacement relocation done */ 545 /* in the ld time. */ 546 #define FLG_IF_DISPDONE 0x00001000 /* displacement relocation done */ 547 /* at the run time */ 548 #define FLG_IF_MAPFILE 0x00002000 /* file is a mapfile */ 549 #define FLG_IF_HSTRTAB 0x00004000 /* file has a string section */ 550 #define FLG_IF_FILEREF 0x00008000 /* file contains a section which */ 551 /* is included in the output */ 552 /* allocatable image */ 553 #define FLG_IF_GNUVER 0x00010000 /* file used GNU-style versioning */ 554 #define FLG_IF_ORDERED 0x00020000 /* ordered section processing */ 555 /* required */ 556 557 struct is_desc { /* input section descriptor */ 558 const char *is_name; /* original section name */ 559 Shdr *is_shdr; /* the elf section header */ 560 Ifl_desc *is_file; /* infile desc for this section */ 561 Os_desc *is_osdesc; /* new output section for this */ 562 /* input section */ 563 Elf_Data *is_indata; /* input sections raw data */ 564 Is_desc *is_symshndx; /* related SHT_SYM_SHNDX section */ 565 Word is_scnndx; /* original section index in file */ 566 Word is_txtndx; /* Index for section. Used to decide */ 567 /* where to insert section when */ 568 /* reordering sections */ 569 Word is_keyident; /* key for SHF_ORDERED processing */ 570 /* and identifier used for */ 571 /* placing/ordering sections */ 572 Word is_flags; /* Various flags */ 573 }; 574 575 #define FLG_IS_ORDERED 0x0001 /* this is a SHF_ORDERED section */ 576 #define FLG_IS_KEY 0x0002 /* section requires sort keys */ 577 #define FLG_IS_DISCARD 0x0004 /* section is to be discarded */ 578 #define FLG_IS_RELUPD 0x0008 /* symbol defined here may have moved */ 579 #define FLG_IS_SECTREF 0x0010 /* section has been referenced */ 580 #define FLG_IS_GDATADEF 0x0020 /* section contains global data sym */ 581 #define FLG_IS_EXTERNAL 0x0040 /* isp from an user file */ 582 #define FLG_IS_INSTRMRG 0x0080 /* Usable SHF_MERGE|SHF_STRINGS sec */ 583 #define FLG_IS_GNSTRMRG 0x0100 /* Generated mergeable string section */ 584 #define FLG_IS_GROUPS 0x0200 /* section has groups to process */ 585 #define FLG_IS_PLACE 0x0400 /* section requires to be placed */ 586 #define FLG_IS_COMDAT 0x0800 /* section is COMDAT */ 587 588 /* 589 * Map file and output file processing structures 590 */ 591 struct os_desc { /* Output section descriptor */ 592 const char *os_name; /* the section name */ 593 Elf_Scn *os_scn; /* the elf section descriptor */ 594 Shdr *os_shdr; /* the elf section header */ 595 Os_desc *os_relosdesc; /* the output relocation section */ 596 List os_relisdescs; /* reloc input section descriptors */ 597 /* for this output section */ 598 List os_isdescs; /* list of input sections in output */ 599 APlist *os_mstrisdescs; /* FLG_IS_INSTRMRG input sections */ 600 Sort_desc *os_sort; /* used for sorting sections */ 601 Sg_desc *os_sgdesc; /* segment os_desc is placed on */ 602 Elf_Data *os_outdata; /* output sections raw data */ 603 APlist *os_comdats; /* list of COMDAT sections present */ 604 /* in current output section */ 605 Word os_scnsymndx; /* index in output symtab of section */ 606 /* symbol for this section */ 607 Word os_txtndx; /* Index for section. Used to decide */ 608 /* where to insert section when */ 609 /* reordering sections */ 610 Xword os_szoutrels; /* size of output relocation section */ 611 uint_t os_namehash; /* hash on section name */ 612 uchar_t os_flags; /* various flags */ 613 }; 614 615 #define FLG_OS_KEY 0x01 /* section requires sort keys */ 616 #define FLG_OS_OUTREL 0x02 /* output rel against this section */ 617 #define FLG_OS_SECTREF 0x04 /* isps are not affected by -zignore */ 618 619 /* 620 * For sorting sections. 621 */ 622 struct sort_desc { 623 Is_desc **st_order; 624 Word st_ordercnt; 625 Is_desc **st_before; 626 Word st_beforecnt; 627 Is_desc **st_after; 628 Word st_aftercnt; 629 }; 630 631 struct sg_desc { /* output segment descriptor */ 632 Phdr sg_phdr; /* segment header for output file */ 633 const char *sg_name; /* segment name */ 634 Xword sg_round; /* data rounding required (mapfile) */ 635 Xword sg_length; /* maximum segment length; if 0 */ 636 /* segment is not specified */ 637 APlist *sg_osdescs; /* list of output section descriptors */ 638 APlist *sg_secorder; /* list specifying section ordering */ 639 /* for the segment */ 640 Half sg_flags; 641 Sym_desc *sg_sizesym; /* size symbol for this segment */ 642 Xword sg_addralign; /* LCM of sh_addralign */ 643 Elf_Scn *sg_fscn; /* the SCN of the first section. */ 644 }; 645 646 647 #define FLG_SG_VADDR 0x0001 /* vaddr segment attribute set */ 648 #define FLG_SG_PADDR 0x0002 /* paddr segment attribute set */ 649 #define FLG_SG_LENGTH 0x0004 /* length segment attribute set */ 650 #define FLG_SG_ALIGN 0x0008 /* align segment attribute set */ 651 #define FLG_SG_ROUND 0x0010 /* round segment attribute set */ 652 #define FLG_SG_FLAGS 0x0020 /* flags segment attribute set */ 653 #define FLG_SG_TYPE 0x0040 /* type segment attribute set */ 654 #define FLG_SG_ORDER 0x0080 /* has ordering been turned on for */ 655 /* this segment. */ 656 /* i.e. ?[O] option in mapfile */ 657 #define FLG_SG_NOHDR 0x0100 /* don't map ELF or phdrs into */ 658 /* this segment */ 659 #define FLG_SG_EMPTY 0x0200 /* an empty segment specification */ 660 /* no input sections will be */ 661 /* associated to this section */ 662 #define FLG_SG_KEY 0x0400 /* segment requires sort keys */ 663 #define FLG_SG_DISABLED 0x0800 /* this segment is disabled */ 664 #define FLG_SG_PHREQ 0x1000 /* this segment requires a program */ 665 /* header */ 666 667 struct sec_order { 668 const char *sco_secname; /* section name to be ordered */ 669 Word sco_index; /* ordering index for section */ 670 Half sco_flags; 671 }; 672 673 #define FLG_SGO_USED 0x0001 /* was ordering used? */ 674 675 struct ent_desc { /* input section entrance criteria */ 676 List ec_files; /* files from which to accept */ 677 /* sections */ 678 const char *ec_name; /* name to match (NULL if none) */ 679 Word ec_type; /* section type */ 680 Word ec_attrmask; /* section attribute mask (AWX) */ 681 Word ec_attrbits; /* sections attribute bits */ 682 Sg_desc *ec_segment; /* output segment to enter if matched */ 683 Word ec_ndx; /* index to determine where section */ 684 /* meeting this criteria should */ 685 /* inserted. Used for reordering */ 686 /* of sections. */ 687 Half ec_flags; 688 }; 689 690 #define FLG_EC_USED 0x0001 /* entrance criteria met? */ 691 692 /* 693 * Move supplementary structures 694 * Sorted by symbol local/global and then by name. 695 */ 696 typedef struct psym_info { 697 Sym_desc *psym_symd; /* partially initialized symbol */ 698 Word psym_num; /* number of move entires */ 699 Half psym_flag; /* various flag */ 700 List psym_mvs; /* the list of move entries */ 701 } Psym_info; 702 703 #define FLG_PSYM_OVERLAP 0x01 /* Overlapping */ 704 705 /* 706 * One structure is allocated for a move entry. 707 */ 708 typedef struct mv_itm { 709 Xword mv_start; /* start position */ 710 Xword mv_length; /* The length of initialization */ 711 Half mv_flag; /* various flags */ 712 Is_desc *mv_isp; /* input desc. this entry is from */ 713 Move *mv_ientry; /* Input Move_entry */ 714 Word mv_oidx; /* Output Move_entry index */ 715 } Mv_itm; 716 717 #define FLG_MV_OUTSECT 0x01 /* Will be in move section */ 718 719 /* 720 * Define a move descripter used within relocation structures. 721 */ 722 struct mv_desc { 723 Move *mvd_move; 724 Sym_desc *mvd_sym; 725 }; 726 727 struct sym_desc { 728 List sd_GOTndxs; /* list of associated GOT entries */ 729 Sym *sd_sym; /* pointer to symbol table entry */ 730 Sym *sd_osym; /* copy of the original symbol entry */ 731 /* used only for local partial */ 732 Psym_info *sd_psyminfo; /* for partial symbols, maintain a */ 733 /* pointer to parsym_info */ 734 const char *sd_name; /* symbols name */ 735 Ifl_desc *sd_file; /* file where symbol is taken */ 736 Is_desc *sd_isc; /* input section of symbol definition */ 737 Sym_aux *sd_aux; /* auxiliary global symbol info. */ 738 Word sd_symndx; /* index in output symbol table */ 739 Word sd_shndx; /* sect. index sym is associated w/ */ 740 Word sd_flags; /* state flags */ 741 Half sd_flags1; /* more symbol flags */ 742 Half sd_ref; /* reference definition of symbol */ 743 }; 744 745 /* 746 * The auxiliary symbol descriptor contains the additional information (beyond 747 * the symbol descriptor) required to process global symbols. These symbols are 748 * accessed via an internal symbol hash table where locality of reference is 749 * important for performance. 750 */ 751 struct sym_aux { 752 List sa_dfiles; /* files where symbol is defined */ 753 Sym sa_sym; /* copy of symtab entry */ 754 const char *sa_vfile; /* first unavailable definition */ 755 Ifl_desc *sa_bindto; /* symbol to bind to - for translator */ 756 const char *sa_rfile; /* file with first symbol referenced */ 757 Word sa_hash; /* the pure hash value of symbol */ 758 Word sa_PLTndx; /* index into PLT for symbol */ 759 Word sa_PLTGOTndx; /* GOT entry indx for PLT indirection */ 760 Word sa_linkndx; /* index of associated symbol from */ 761 /* ET_DYN file */ 762 Half sa_symspec; /* special symbol ids */ 763 Half sa_overndx; /* output file versioning index */ 764 Half sa_dverndx; /* dependency versioning index */ 765 }; 766 767 768 /* 769 * Nodes used to track symbols in the global AVL symbol dictionary. 770 */ 771 struct sym_avlnode { 772 avl_node_t sav_node; /* AVL node */ 773 Word sav_hash; /* symbol hash value */ 774 const char *sav_name; /* symbol name */ 775 Sym_desc *sav_symdesc; /* SymDesc entry */ 776 }; 777 778 /* 779 * These are the ids for processing of `Special symbols'. They are used 780 * to set the sym->sd_aux->sa_symspec field. 781 */ 782 #define SDAUX_ID_ETEXT 1 /* etext && _etext symbol */ 783 #define SDAUX_ID_EDATA 2 /* edata && _edata symbol */ 784 #define SDAUX_ID_END 3 /* end, _end, && _END_ symbol */ 785 #define SDAUX_ID_DYN 4 /* DYNAMIC && _DYNAMIC symbol */ 786 #define SDAUX_ID_PLT 5 /* _PROCEDURE_LINKAGE_TABLE_ symbol */ 787 #define SDAUX_ID_GOT 6 /* _GLOBAL_OFFSET_TABLE_ symbol */ 788 #define SDAUX_ID_START 7 /* START_ && _START_ symbol */ 789 790 /* 791 * Flags for sym_desc.sd_flags 792 */ 793 #define FLG_SY_MVTOCOMM 0x00000001 /* assign symbol to common (.bss) */ 794 /* this is a result of a */ 795 /* copy reloc against sym */ 796 #define FLG_SY_GLOBREF 0x00000002 /* a global reference has been seen */ 797 #define FLG_SY_WEAKDEF 0x00000004 /* a weak definition has been used */ 798 #define FLG_SY_CLEAN 0x00000008 /* `Sym' entry points to original */ 799 /* input file (read-only). */ 800 #define FLG_SY_UPREQD 0x00000010 /* symbol value update is required, */ 801 /* either it's used as an entry */ 802 /* point or for relocation, but */ 803 /* it must be updated even if */ 804 /* the -s flag is in effect */ 805 #define FLG_SY_NOTAVAIL 0x00000020 /* symbol is not available to the */ 806 /* application either because it */ 807 /* originates from an implicitly */ 808 /* referenced shared object, or */ 809 /* because it is not part of a */ 810 /* specified version. */ 811 #define FLG_SY_REDUCED 0x00000040 /* a global is reduced to local */ 812 #define FLG_SY_VERSPROM 0x00000080 /* version definition has been */ 813 /* promoted to output file */ 814 #define FLG_SY_PROT 0x00000100 /* stv_protected visibility seen */ 815 816 #define FLG_SY_MAPREF 0x00000200 /* symbol reference generated by user */ 817 /* from mapfile */ 818 #define FLG_SY_REFRSD 0x00000400 /* symbols sd_ref has been raised */ 819 /* due to a copy-relocs */ 820 /* weak-strong pairing */ 821 #define FLG_SY_INTPOSE 0x00000800 /* symbol defines an interposer */ 822 #define FLG_SY_INVALID 0x00001000 /* unwanted/erroneous symbol */ 823 #define FLG_SY_SMGOT 0x00002000 /* small got index assigned to symbol */ 824 /* sparc only */ 825 #define FLG_SY_PARENT 0x00004000 /* symbol to be found in parent */ 826 /* only used with direct bindings */ 827 #define FLG_SY_LAZYLD 0x00008000 /* symbol to cause lazyloading of */ 828 /* parent object */ 829 #define FLG_SY_ISDISC 0x00010000 /* symbol is a member of a DISCARDED */ 830 /* section (COMDAT) */ 831 #define FLG_SY_PAREXPN 0x00020000 /* partially init. symbol to be */ 832 /* expanded */ 833 #define FLG_SY_PLTPAD 0x00040000 /* pltpadding has been allocated for */ 834 /* this symbol */ 835 #define FLG_SY_REGSYM 0x00080000 /* REGISTER symbol (sparc only) */ 836 #define FLG_SY_SOFOUND 0x00100000 /* compared against an SO definition */ 837 #define FLG_SY_EXTERN 0x00200000 /* symbol is external, allows -zdefs */ 838 /* error suppression */ 839 #define FLG_SY_MAPUSED 0x00400000 /* mapfile symbol used (occurred */ 840 /* within a relocatable object) */ 841 #define FLG_SY_COMMEXP 0x00800000 /* COMMON symbol which has been */ 842 /* allocated */ 843 #define FLG_SY_CMDREF 0x01000000 /* symbol was referenced from the */ 844 /* command line. (ld -u <>, */ 845 /* ld -zrtldinfo=<>, ...) */ 846 #define FLG_SY_SPECSEC 0x02000000 /* section index is reserved value */ 847 /* ABS, COMMON, ... */ 848 #define FLG_SY_TENTSYM 0x04000000 /* tentative symbol */ 849 #define FLG_SY_VISIBLE 0x08000000 /* symbols visibility determined */ 850 #define FLG_SY_STDFLTR 0x10000000 /* symbol is a standard filter */ 851 #define FLG_SY_AUXFLTR 0x20000000 /* symbol is an auxiliary filter */ 852 #define FLG_SY_DYNSORT 0x40000000 /* req. in dyn[sym|tls]sort section */ 853 #define FLG_SY_NODYNSORT 0x80000000 /* excluded from dyn[sym_tls]sort sec */ 854 855 /* 856 * Sym_desc.sd_flags1 857 */ 858 #define FLG_SY1_DEFAULT 0x00000001 /* global symbol, default */ 859 #define FLG_SY1_SINGLE 0x00000002 /* global symbol, singleton defined */ 860 #define FLG_SY1_PROTECT 0x00000004 /* global symbol, protected defined */ 861 #define FLG_SY1_EXPORT 0x00000008 /* global symbol, exported defined */ 862 863 #define MSK_SY1_GLOBAL \ 864 (FLG_SY1_DEFAULT | FLG_SY1_SINGLE | FLG_SY1_PROTECT | FLG_SY1_EXPORT) 865 /* this mask indicates that the */ 866 /* symbol has been explicitly */ 867 /* defined within a mapfile */ 868 /* definition, and is a candidate */ 869 /* for versioning */ 870 871 #define FLG_SY1_HIDDEN 0x00000010 /* global symbol, reduce to local */ 872 #define FLG_SY1_ELIM 0x00000020 /* global symbol, eliminate */ 873 #define FLG_SY1_IGNORE 0x00000040 /* global symbol, ignored */ 874 875 #define MSK_SY1_LOCAL (FLG_SY1_HIDDEN | FLG_SY1_ELIM | FLG_SY1_IGNORE) 876 /* this mask allows all local state */ 877 /* flags to be removed when the */ 878 /* symbol is copy relocated */ 879 880 #define FLG_SY1_EXPDEF 0x00000100 /* symbol visibility defined */ 881 /* explicitly */ 882 883 #define MSK_SY1_NOAUTO (FLG_SY1_SINGLE | FLG_SY1_EXPORT | FLG_SY1_EXPDEF) 884 /* this mask indicates that the */ 885 /* symbol is not a candidate for */ 886 /* auto-reduction/elimination */ 887 888 #define FLG_SY1_MAPFILE 0x00000200 /* symbol attribute defined in a */ 889 /* mapfile */ 890 #define FLG_SY1_DIR 0x00000400 /* global symbol, direct bindings */ 891 #define FLG_SY1_NDIR 0x00000800 /* global symbol, nondirect bindings */ 892 893 /* 894 * Create a mask for (sym.st_other & visibility) since the gABI does not yet 895 * define a ELF*_ST_OTHER macro. 896 */ 897 #define MSK_SYM_VISIBILITY 0x7 898 899 /* 900 * Structure to manage the shared object definition lists. There are two lists 901 * that use this structure: 902 * 903 * o ofl_soneed; maintain the list of implicitly required dependencies 904 * (ie. shared objects needed by other shared objects). These definitions 905 * may include RPATH's required to locate the dependencies, and any 906 * version requirements. 907 * 908 * o ofl_socntl; maintains the shared object control definitions. These are 909 * provided by the user (via a mapfile) and are used to indicate any 910 * SONAME translations and verion control requirements. 911 */ 912 struct sdf_desc { 913 const char *sdf_name; /* the shared objects file name */ 914 const char *sdf_soname; /* the shared objects SONAME */ 915 char *sdf_rpath; /* library search path DT_RPATH */ 916 const char *sdf_rfile; /* referencing file for diagnostics */ 917 Ifl_desc *sdf_file; /* the final input file descriptor */ 918 List sdf_vers; /* list of versions that are required */ 919 /* from this object */ 920 List sdf_verneed; /* list of VERNEEDS to create for */ 921 /* this object (via SPECVERS or */ 922 /* ADDVERS) */ 923 Word sdf_flags; 924 }; 925 926 #define FLG_SDF_SONAME 0x02 /* An alternative SONAME is supplied */ 927 #define FLG_SDF_SELECT 0x04 /* version control selection required */ 928 #define FLG_SDF_VERIFY 0x08 /* version definition verification */ 929 /* required */ 930 #define FLG_SDF_SPECVER 0x10 /* specify VERNEEDS */ 931 #define FLG_SDF_ADDVER 0x20 /* add VERNEED references */ 932 933 /* 934 * Structure to manage shared object version usage requirements. 935 */ 936 struct sdv_desc { 937 const char *sdv_name; /* version name */ 938 const char *sdv_ref; /* versions reference */ 939 Word sdv_flags; /* flags */ 940 }; 941 942 #define FLG_SDV_MATCHED 0x01 /* VERDEF found and matched */ 943 944 /* 945 * Structures to manage versioning information. Two versioning structures are 946 * defined: 947 * 948 * o a version descriptor maintains a linked list of versions and their 949 * associated dependencies. This is used to build the version definitions 950 * for an image being created (see map_symbol), and to determine the 951 * version dependency graph for any input files that are versioned. 952 * 953 * o a version index array contains each version of an input file that is 954 * being processed. It informs us which versions are available for 955 * binding, and is used to generate any version dependency information. 956 */ 957 struct ver_desc { 958 const char *vd_name; /* version name */ 959 Word vd_hash; /* hash value of name */ 960 Ifl_desc *vd_file; /* file that defined version */ 961 Half vd_ndx; /* coordinates with symbol index */ 962 Half vd_flags; /* version information */ 963 List vd_deps; /* version dependencies */ 964 Ver_desc *vd_ref; /* dependency's first reference */ 965 }; 966 967 struct ver_index { 968 const char *vi_name; /* dependency version name */ 969 Half vi_flags; /* communicates availability */ 970 Half vi_overndx; /* Index asssigned to this version in */ 971 /* output object Verneed section */ 972 Ver_desc *vi_desc; /* cross reference to descriptor */ 973 }; 974 975 /* 976 * Define any internal version descriptor flags ([vd|vi]_flags). Note that the 977 * first byte is reserved for user visible flags (refer VER_FLG's in link.h). 978 */ 979 #define MSK_VER_USER 0x0f /* mask for user visible flags */ 980 981 #define FLG_VER_AVAIL 0x10 /* version is available for binding */ 982 #define FLG_VER_REFER 0x20 /* version has been referenced */ 983 #define FLG_VER_SPECVER 0x40 /* via $SPECVERS in mapfile. */ 984 /* Cannot be normalized away */ 985 #define FLG_VER_CYCLIC 0x80 /* a member of cyclic dependency */ 986 987 /* 988 * isalist(1) descriptor - used to break an isalist string into its component 989 * options. 990 */ 991 struct isa_opt { 992 char *isa_name; /* individual isa option name */ 993 size_t isa_namesz; /* and associated size */ 994 }; 995 996 struct isa_desc { 997 char *isa_list; /* sysinfo(SI_ISALIST) list */ 998 size_t isa_listsz; /* and associated size */ 999 Isa_opt *isa_opt; /* table of individual isa options */ 1000 size_t isa_optno; /* and associated number */ 1001 }; 1002 1003 /* 1004 * uname(2) descriptor - used to break a utsname structure into its component 1005 * options (at least those that we're interested in). 1006 */ 1007 struct uts_desc { 1008 char *uts_osname; /* operating system name */ 1009 size_t uts_osnamesz; /* and associated size */ 1010 char *uts_osrel; /* operating system release */ 1011 size_t uts_osrelsz; /* and associated size */ 1012 }; 1013 1014 /* 1015 * SHT_GROUP descriptor - used to track group sections at the global 1016 * level to resolve conflicts and determine which to keep. 1017 */ 1018 struct group_desc { 1019 Is_desc *gd_isc; /* input section descriptor */ 1020 Is_desc *gd_oisc; /* overriding input section */ 1021 /* descriptor when discarded */ 1022 const char *gd_name; /* group name (signature symbol) */ 1023 Word *gd_data; /* data for group section */ 1024 size_t gd_cnt; /* number of entries in group data */ 1025 }; 1026 1027 /* 1028 * Indexes into the ld_support_funcs[] table. 1029 */ 1030 typedef enum { 1031 LDS_VERSION = 0, 1032 LDS_INPUT_DONE, 1033 LDS_START, 1034 LDS_ATEXIT, 1035 LDS_OPEN, 1036 LDS_FILE, 1037 LDS_INSEC, 1038 LDS_SEC, 1039 LDS_NUM 1040 } Support_ndx; 1041 1042 /* 1043 * Structure to manage archive member caching. Each archive has an archive 1044 * descriptor (Ar_desc) associated with it. This contains pointers to the 1045 * archive symbol table (obtained by elf_getarsyms(3e)) and an auxiliary 1046 * structure (Ar_uax[]) that parallels this symbol table. The member element 1047 * of this auxiliary table indicates whether the archive member associated with 1048 * the symbol offset has already been extracted (AREXTRACTED) or partially 1049 * processed (refer process_member()). 1050 */ 1051 typedef struct ar_mem { 1052 Elf *am_elf; /* elf descriptor for this member */ 1053 char *am_name; /* members name */ 1054 char *am_path; /* path (ie. lib(foo.o)) */ 1055 Sym *am_syms; /* start of global symbols */ 1056 char *am_strs; /* associated string table start */ 1057 Xword am_symn; /* no. of global symbols */ 1058 } Ar_mem; 1059 1060 typedef struct ar_aux { 1061 Sym_desc *au_syms; /* internal symbol descriptor */ 1062 Ar_mem *au_mem; /* associated member */ 1063 } Ar_aux; 1064 1065 #define FLG_ARMEM_PROC (Ar_mem *)-1 1066 1067 typedef struct ar_desc { 1068 const char *ad_name; /* archive file name */ 1069 Elf *ad_elf; /* elf descriptor for the archive */ 1070 Elf_Arsym *ad_start; /* archive symbol table start */ 1071 Ar_aux *ad_aux; /* auxiliary symbol information */ 1072 dev_t ad_stdev; /* device id and inode number for */ 1073 ino_t ad_stino; /* multiple inclusion checks */ 1074 ofl_flag_t ad_flags; /* archive specific cmd line flags */ 1075 } Ar_desc; 1076 1077 /* 1078 * Define any archive descriptor flags. NOTE, make sure they do not clash with 1079 * any output file descriptor archive extraction flags, as these are saved in 1080 * the same entry (see MSK_OF1_ARCHIVE). 1081 */ 1082 #define FLG_ARD_EXTRACT 0x00010000 /* archive member has been extracted */ 1083 1084 /* 1085 * Function Declarations. 1086 */ 1087 #if defined(_ELF64) 1088 1089 #define ld_create_outfile ld64_create_outfile 1090 #define ld_ent_setup ld64_ent_setup 1091 #define ld_init_strings ld64_init_strings 1092 #define ld_init_target ld64_init_target 1093 #define ld_make_sections ld64_make_sections 1094 #define ld_main ld64_main 1095 #define ld_ofl_cleanup ld64_ofl_cleanup 1096 #define ld_process_open ld64_process_open 1097 #define ld_reloc_init ld64_reloc_init 1098 #define ld_reloc_process ld64_reloc_process 1099 #define ld_sym_validate ld64_sym_validate 1100 #define ld_update_outfile ld64_update_outfile 1101 1102 #else 1103 1104 #define ld_create_outfile ld32_create_outfile 1105 #define ld_ent_setup ld32_ent_setup 1106 #define ld_init_strings ld32_init_strings 1107 #define ld_init_target ld32_init_target 1108 #define ld_make_sections ld32_make_sections 1109 #define ld_main ld32_main 1110 #define ld_ofl_cleanup ld32_ofl_cleanup 1111 #define ld_process_open ld32_process_open 1112 #define ld_reloc_init ld32_reloc_init 1113 #define ld_reloc_process ld32_reloc_process 1114 #define ld_sym_validate ld32_sym_validate 1115 #define ld_update_outfile ld32_update_outfile 1116 1117 #endif 1118 1119 extern int ld_getopt(Lm_list *, int, int, char **); 1120 1121 extern int ld32_main(int, char **, Half); 1122 extern int ld64_main(int, char **, Half); 1123 1124 extern uintptr_t ld_create_outfile(Ofl_desc *); 1125 extern uintptr_t ld_ent_setup(Ofl_desc *, Xword); 1126 extern uintptr_t ld_init_strings(Ofl_desc *); 1127 extern int ld_init_target(Lm_list *, Half mach); 1128 extern uintptr_t ld_make_sections(Ofl_desc *); 1129 extern void ld_ofl_cleanup(Ofl_desc *); 1130 extern Ifl_desc *ld_process_open(const char *, const char *, int *, 1131 Ofl_desc *, Word, Rej_desc *); 1132 extern uintptr_t ld_reloc_init(Ofl_desc *); 1133 extern uintptr_t ld_reloc_process(Ofl_desc *); 1134 extern uintptr_t ld_sym_validate(Ofl_desc *); 1135 extern uintptr_t ld_update_outfile(Ofl_desc *); 1136 1137 #ifdef __cplusplus 1138 } 1139 #endif 1140 1141 #endif /* _LIBLD_H */ 1142