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 * Output file processing structure 132 */ 133 typedef Lword ofl_flag_t; 134 struct ofl_desc { 135 char *ofl_sgsid; /* link-editor identification */ 136 const char *ofl_name; /* full file name */ 137 Elf *ofl_elf; /* elf_memory() elf descriptor */ 138 Elf *ofl_welf; /* ELF_C_WRITE elf descriptor */ 139 Ehdr *ofl_dehdr; /* default elf header, and new elf */ 140 Ehdr *ofl_nehdr; /* header describing this file */ 141 Phdr *ofl_phdr; /* program header descriptor */ 142 Phdr *ofl_tlsphdr; /* TLS phdr */ 143 int ofl_fd; /* file descriptor */ 144 size_t ofl_size; /* image size */ 145 List ofl_maps; /* list of input mapfiles */ 146 List ofl_segs; /* list of segments */ 147 List ofl_ents; /* list of entrance descriptors */ 148 List ofl_objs; /* relocatable object file list */ 149 Word ofl_objscnt; /* and count */ 150 List ofl_ars; /* archive library list */ 151 Word ofl_arscnt; /* and count */ 152 int ofl_ars_gsandx; /* archive group argv index. 0 means */ 153 /* no current group, < 0 means */ 154 /* error reported. >0 is cur ndx */ 155 Word ofl_ars_gsndx; /* current -zrescan-start ofl_ars ndx */ 156 List ofl_sos; /* shared object list */ 157 Word ofl_soscnt; /* and count */ 158 List ofl_soneed; /* list of implicitly required .so's */ 159 List ofl_socntl; /* list of .so control definitions */ 160 List ofl_outrels; /* list of output relocations */ 161 Word ofl_outrelscnt; /* and count */ 162 List ofl_actrels; /* list of relocations to perform */ 163 Word ofl_actrelscnt; /* and count */ 164 Word ofl_entrelscnt; /* no of relocations entered */ 165 List ofl_copyrels; /* list of copy relocations */ 166 List ofl_ordered; /* list of shf_ordered sections */ 167 List ofl_syminfsyms; /* list of interesting syms */ 168 /* for syminfo processing */ 169 List ofl_ismove; /* list of .SUNW_move sections */ 170 List ofl_mvrelisdescs; /* list of relocation input section */ 171 /* targeting to expanded area */ 172 List ofl_parsym; /* list of Parsym_info */ 173 List ofl_extrarels; /* relocation sections which have */ 174 /* a NULL sh_info */ 175 avl_tree_t *ofl_groups; /* pointer to head of Groups AVL tree */ 176 List ofl_initarray; /* list of init array func names */ 177 List ofl_finiarray; /* list of fini array func names */ 178 List ofl_preiarray; /* list of preinit array func names */ 179 List ofl_rtldinfo; /* list of rtldinfo syms */ 180 List ofl_osgroups; /* list of output GROUP sections */ 181 List ofl_ostlsseg; /* pointer to sections in TLS segment */ 182 #if defined(_ELF64) /* for amd64 target only */ 183 List ofl_unwind; /* list of unwind output sections */ 184 Os_desc *ofl_unwindhdr; /* Unwind hdr */ 185 #endif 186 avl_tree_t ofl_symavl; /* pointer to head of Syms AVL tree */ 187 Sym_desc **ofl_regsyms; /* array of potential register */ 188 Word ofl_regsymsno; /* symbols and array count */ 189 Word ofl_regsymcnt; /* no. of output register symbols */ 190 Word ofl_lregsymcnt; /* no. of local register symbols */ 191 Sym_desc *ofl_dtracesym; /* ld -zdtrace= */ 192 ofl_flag_t ofl_flags; /* various state bits, args etc. */ 193 ofl_flag_t ofl_flags1; /* more flags */ 194 void *ofl_entry; /* entry point (-e and Sym_desc *) */ 195 char *ofl_filtees; /* shared objects we are a filter for */ 196 const char *ofl_soname; /* (-h option) output file name for */ 197 /* dynamic structure */ 198 const char *ofl_interp; /* interpreter name used by exec() */ 199 char *ofl_rpath; /* run path to store in .dynamic */ 200 char *ofl_config; /* config path to store in .dynamic */ 201 List ofl_ulibdirs; /* user supplied library search list */ 202 List ofl_dlibdirs; /* default library search list */ 203 Word ofl_vercnt; /* number of versions to generate */ 204 List ofl_verdesc; /* list of version descriptors */ 205 size_t ofl_verdefsz; /* size of version definition section */ 206 size_t ofl_verneedsz; /* size of version needed section */ 207 Word ofl_entercnt; /* no. of global symbols entered */ 208 Word ofl_globcnt; /* no. of global symbols to output */ 209 Word ofl_scopecnt; /* no. of scoped symbols to output */ 210 Word ofl_dynscopecnt; /* no. scoped syms in .SUNW_ldynsym */ 211 Word ofl_elimcnt; /* no. of eliminated symbols */ 212 Word ofl_locscnt; /* no. of local symbols in .symtab */ 213 Word ofl_dynlocscnt; /* no. local symbols in .SUNW_ldynsym */ 214 Word ofl_dynsymsortcnt; /* no. ndx in .SUNW_dynsymsort */ 215 Word ofl_dyntlssortcnt; /* no. ndx in .SUNW_dyntlssort */ 216 Word ofl_dynshdrcnt; /* no. of output section in .dynsym */ 217 Word ofl_shdrcnt; /* no. of output sections */ 218 Str_tbl *ofl_shdrsttab; /* Str_tbl for shdr strtab */ 219 Str_tbl *ofl_strtab; /* Str_tbl for symtab strtab */ 220 Str_tbl *ofl_dynstrtab; /* Str_tbl for dymsym strtab */ 221 Gotndx *ofl_tlsldgotndx; /* index to LD TLS_index structure */ 222 Xword ofl_relocsz; /* size of output relocations */ 223 Xword ofl_relocgotsz; /* size of .got relocations */ 224 Xword ofl_relocpltsz; /* size of .plt relocations */ 225 Xword ofl_relocbsssz; /* size of .bss (copy) relocations */ 226 Xword ofl_relocrelsz; /* size of .rel[a] relocations */ 227 Word ofl_relocincnt; /* no. of input relocations */ 228 Word ofl_reloccnt; /* tot number of output relocations */ 229 Word ofl_reloccntsub; /* tot numb of output relocations to */ 230 /* skip (-zignore) */ 231 Word ofl_relocrelcnt; /* tot number of relative */ 232 /* relocations */ 233 Word ofl_gotcnt; /* no. of .got entries */ 234 Word ofl_pltcnt; /* no. of .plt entries */ 235 Word ofl_pltpad; /* no. of .plt padd entries */ 236 Word ofl_hashbkts; /* no. of hash buckets required */ 237 Is_desc *ofl_isbss; /* .bss input section (globals) */ 238 Is_desc *ofl_islbss; /* .lbss input section (globals) */ 239 Is_desc *ofl_istlsbss; /* .tlsbss input section (globals) */ 240 Is_desc *ofl_isparexpn; /* -z nopartial .data input section */ 241 Os_desc *ofl_osdynamic; /* .dynamic output section */ 242 Os_desc *ofl_osdynsym; /* .dynsym output section */ 243 Os_desc *ofl_osldynsym; /* .SUNW_ldynsym output section */ 244 Os_desc *ofl_osdynstr; /* .dynstr output section */ 245 Os_desc *ofl_osdynsymsort; /* .SUNW_dynsymsort output section */ 246 Os_desc *ofl_osdyntlssort; /* .SUNW_dyntlssort output section */ 247 Os_desc *ofl_osgot; /* .got output section */ 248 Os_desc *ofl_oshash; /* .hash output section */ 249 Os_desc *ofl_osinitarray; /* .initarray output section */ 250 Os_desc *ofl_osfiniarray; /* .finiarray output section */ 251 Os_desc *ofl_ospreinitarray; /* .preinitarray output section */ 252 Os_desc *ofl_osinterp; /* .interp output section */ 253 Os_desc *ofl_oscap; /* .SUNW_cap output section */ 254 Os_desc *ofl_osplt; /* .plt output section */ 255 Os_desc *ofl_osmove; /* .SUNW_move output section */ 256 Os_desc *ofl_osrelhead; /* first relocation section */ 257 Os_desc *ofl_osrel; /* .rel[a] relocation section */ 258 Os_desc *ofl_osshstrtab; /* .shstrtab output section */ 259 Os_desc *ofl_osstrtab; /* .strtab output section */ 260 Os_desc *ofl_ossymtab; /* .symtab output section */ 261 Os_desc *ofl_ossymshndx; /* .symtab_shndx output section */ 262 Os_desc *ofl_osdynshndx; /* .dynsym_shndx output section */ 263 Os_desc *ofl_osldynshndx; /* .SUNW_ldynsym_shndx output sec */ 264 Os_desc *ofl_osverdef; /* .version definition output section */ 265 Os_desc *ofl_osverneed; /* .version needed output section */ 266 Os_desc *ofl_osversym; /* .version symbol ndx output section */ 267 Word ofl_dtflags_1; /* DT_FLAGS_1 entries */ 268 Word ofl_dtflags; /* DT_FLAGS entries */ 269 Os_desc *ofl_ossyminfo; /* .SUNW_syminfo output section */ 270 Half ofl_parexpnndx; /* -z nopartial section index */ 271 /* Ref. at perform_outreloc() in */ 272 /* libld/{mach}/machrel.c */ 273 Xword *ofl_checksum; /* DT_CHECKSUM value address */ 274 char *ofl_depaudit; /* dependency auditing required (-P) */ 275 char *ofl_audit; /* object auditing required (-p) */ 276 Alist *ofl_symfltrs; /* per-symbol filtees and their */ 277 Alist *ofl_dtsfltrs; /* associated .dynamic/.dynstrs */ 278 Xword ofl_hwcap_1; /* hardware capabilities */ 279 Xword ofl_sfcap_1; /* software capabilities */ 280 Lm_list *ofl_lml; /* runtime link-map list */ 281 Gottable *ofl_gottable; /* debugging got information */ 282 }; 283 284 #define FLG_OF_DYNAMIC 0x00000001 /* generate dynamic output module */ 285 #define FLG_OF_STATIC 0x00000002 /* generate static output module */ 286 #define FLG_OF_EXEC 0x00000004 /* generate an executable */ 287 #define FLG_OF_RELOBJ 0x00000008 /* generate a relocatable object */ 288 #define FLG_OF_SHAROBJ 0x00000010 /* generate a shared object */ 289 #define FLG_OF_BFLAG 0x00000020 /* do no special plt building: -b */ 290 #define FLG_OF_IGNENV 0x00000040 /* ignore LD_LIBRARY_PATH: -i */ 291 #define FLG_OF_STRIP 0x00000080 /* strip output: -s */ 292 #define FLG_OF_NOWARN 0x00000100 /* disable symbol warnings: -t */ 293 #define FLG_OF_NOUNDEF 0x00000200 /* allow no undefined symbols: -zdefs */ 294 #define FLG_OF_PURETXT 0x00000400 /* allow no text relocations: -ztext */ 295 #define FLG_OF_GENMAP 0x00000800 /* generate a memory map: -m */ 296 #define FLG_OF_DYNLIBS 0x00001000 /* dynamic input allowed: -Bdynamic */ 297 #define FLG_OF_SYMBOLIC 0x00002000 /* bind global symbols: -Bsymbolic */ 298 #define FLG_OF_ADDVERS 0x00004000 /* add version stamp: -Qy */ 299 #define FLG_OF_NOLDYNSYM 0x00008000 /* -znoldynsym set */ 300 #define FLG_OF_SEGORDER 0x00010000 /* segment ordering is required */ 301 #define FLG_OF_SEGSORT 0x00020000 /* segment sorting is required */ 302 #define FLG_OF_TEXTREL 0x00040000 /* text relocations have been found */ 303 #define FLG_OF_MULDEFS 0x00080000 /* multiple symbols are allowed */ 304 #define FLG_OF_TLSPHDR 0x00100000 /* a TLS program header is required */ 305 #define FLG_OF_BLDGOT 0x00200000 /* build GOT table */ 306 #define FLG_OF_VERDEF 0x00400000 /* record version definitions */ 307 #define FLG_OF_VERNEED 0x00800000 /* record version dependencies */ 308 #define FLG_OF_NOVERSEC 0x01000000 /* don't record version sections */ 309 #define FLG_OF_KEY 0x02000000 /* file requires sort keys */ 310 #define FLG_OF_PROCRED 0x04000000 /* process any symbol reductions by */ 311 /* effecting the symbol table */ 312 /* output and relocations */ 313 #define FLG_OF_SYMINFO 0x08000000 /* create a syminfo section */ 314 #define FLG_OF_AUX 0x10000000 /* ofl_filter is an auxiliary filter */ 315 #define FLG_OF_FATAL 0x20000000 /* fatal error during input */ 316 #define FLG_OF_WARN 0x40000000 /* warning during input processing. */ 317 #define FLG_OF_VERBOSE 0x80000000 /* -z verbose flag set */ 318 319 #define FLG_OF_MAPSYMB 0x000100000000 /* symbolic scope definition seen */ 320 #define FLG_OF_MAPGLOB 0x000200000000 /* global scope definition seen */ 321 #define FLG_OF_COMREL 0x000400000000 /* -z combreloc set, which enables */ 322 /* DT_RELACNT tracking, */ 323 #define FLG_OF_NOCOMREL 0x000800000000 /* -z nocombreloc set */ 324 #define FLG_OF_AUTOLCL 0x001000000000 /* automatically reduce unspecified */ 325 /* global symbols to locals */ 326 #define FLG_OF_AUTOELM 0x002000000000 /* automatically eliminate */ 327 /* unspecified global symbols */ 328 #define FLG_OF_REDLSYM 0x004000000000 /* reduce local symbols */ 329 #define FLG_OF_SECORDER 0x008000000000 /* section ordering is required */ 330 331 /* 332 * In the flags1 arena, establish any options that are applicable to archive 333 * extraction first, and associate a mask. These values are recorded with any 334 * archive descriptor so that they may be reset should the archive require a 335 * rescan to try and resolve undefined symbols. 336 */ 337 #define FLG_OF1_ALLEXRT 0x00000001 /* extract all members from an */ 338 /* archive file */ 339 #define FLG_OF1_WEAKEXT 0x00000002 /* allow archive extraction to */ 340 /* resolve weak references */ 341 #define MSK_OF1_ARCHIVE 0x00000003 /* archive flags mask */ 342 343 #define FLG_OF1_NOINTRP 0x00000008 /* -z nointerp flag set */ 344 #define FLG_OF1_ZDIRECT 0x00000010 /* -z direct flag set */ 345 #define FLG_OF1_NDIRECT 0x00000020 /* no-direct bindings specified */ 346 #define FLG_OF1_OVHWCAP 0x00000040 /* override any input hardware or */ 347 #define FLG_OF1_OVSFCAP 0x00000080 /* software capabilities */ 348 #define FLG_OF1_RELDYN 0x00000100 /* process .dynamic in rel obj */ 349 #define FLG_OF1_NRLXREL 0x00000200 /* -z norelaxreloc flag set */ 350 #define FLG_OF1_RLXREL 0x00000400 /* -z relaxreloc flag set */ 351 #define FLG_OF1_IGNORE 0x00000800 /* ignore unused dependencies */ 352 353 #define FLG_OF1_TEXTOFF 0x00002000 /* text relocations are ok */ 354 #define FLG_OF1_ABSEXEC 0x00004000 /* -zabsexec set */ 355 #define FLG_OF1_LAZYLD 0x00008000 /* lazy loading of objects enabled */ 356 #define FLG_OF1_GRPPRM 0x00010000 /* dependencies are to have */ 357 /* GROUPPERM enabled */ 358 #define FLG_OF1_OVRFLW 0x00020000 /* size exceeds 32-bit limitation */ 359 /* of 32-bit libld */ 360 #define FLG_OF1_NOPARTI 0x00040000 /* -znopartial set */ 361 #define FLG_OF1_BSSOREL 0x00080000 /* output relocation against bss */ 362 /* section */ 363 #define FLG_OF1_TLSOREL 0x00100000 /* output relocation against .tlsbss */ 364 /* section */ 365 #define FLG_OF1_MEMORY 0x00200000 /* produce a memory model */ 366 367 #define FLG_OF1_ENCDIFF 0x00800000 /* Host running linker has different */ 368 /* byte order than output object */ 369 #define FLG_OF1_VADDR 0x01000000 /* vaddr was explicitly set */ 370 #define FLG_OF1_EXTRACT 0x02000000 /* archive member has been extracted */ 371 #define FLG_OF1_RESCAN 0x04000000 /* any archives should be rescanned */ 372 #define FLG_OF1_IGNPRC 0x08000000 /* ignore processing required */ 373 #define FLG_OF1_NCSTTAB 0x10000000 /* -znocompstrtab set */ 374 #define FLG_OF1_DONE 0x20000000 /* link-editor processing complete */ 375 #define FLG_OF1_NONREG 0x40000000 /* non-regular file specified as */ 376 /* the output file */ 377 #define FLG_OF1_ALNODIR 0x80000000 /* establish NODIRECT for all */ 378 /* exported interfaces. */ 379 380 /* 381 * Test to see if the output file would allow the presence of 382 * a .dynsym section. 383 */ 384 #define OFL_ALLOW_DYNSYM(_ofl) (((_ofl)->ofl_flags & \ 385 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == FLG_OF_DYNAMIC) 386 387 /* 388 * Test to see if the output file would allow the presence of 389 * a .SUNW_ldynsym section. The requirements are that a .dynsym 390 * is allowed, and -znoldynsym has not been specified. Note that 391 * even if the answer is True (1), we will only generate one if there 392 * are local symbols that require it. 393 */ 394 #define OFL_ALLOW_LDYNSYM(_ofl) (((_ofl)->ofl_flags & \ 395 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ | FLG_OF_NOLDYNSYM)) == FLG_OF_DYNAMIC) 396 397 /* 398 * Test to see if relocation processing should be done. This is normally 399 * true, but can be disabled via the '-z noreloc' option. Note that 400 * relocatable objects are still relocated even if '-z noreloc' is present. 401 */ 402 #define OFL_DO_RELOC(_ofl) (((_ofl)->ofl_flags & FLG_OF_RELOBJ) || \ 403 !((_ofl)->ofl_dtflags_1 & DF_1_NORELOC)) 404 405 /* 406 * Relocation (active & output) processing structure - transparent to common 407 * code. 408 * 409 * Note that rel_raddend is primarily only of interest to RELA relocations, 410 * and is set to 0 for REL. However, there is an exception: If FLG_REL_NADDEND 411 * is set, then rel_raddend contains a replacement value for the implicit 412 * addend found in the relocation target. 413 */ 414 struct rel_desc { 415 Os_desc *rel_osdesc; /* output section reloc is against */ 416 Is_desc *rel_isdesc; /* input section reloc is against */ 417 const char *rel_sname; /* symbol name (may be "unknown") */ 418 Sym_desc *rel_sym; /* sym relocation is against */ 419 Sym_desc *rel_usym; /* strong sym if this is a weak pair */ 420 Mv_desc *rel_move; /* move table information */ 421 Word rel_flags; /* misc. flags for relocations */ 422 Word rel_rtype; /* relocation type */ 423 Xword rel_roffset; /* relocation offset */ 424 Sxword rel_raddend; /* addend from input relocation */ 425 Word rel_typedata; /* ELF_R_TYPE_DATA(info) */ 426 }; 427 428 /* 429 * common flags used on the Rel_desc structure (defined in machrel.h). 430 */ 431 #define FLG_REL_GOT 0x00000001 /* relocation against GOT */ 432 #define FLG_REL_PLT 0x00000002 /* relocation against PLT */ 433 #define FLG_REL_BSS 0x00000004 /* relocation against BSS */ 434 #define FLG_REL_LOAD 0x00000008 /* section loadable */ 435 #define FLG_REL_SCNNDX 0x00000010 /* use section index for symbol ndx */ 436 #define FLG_REL_CLVAL 0x00000020 /* clear VALUE for active relocation */ 437 #define FLG_REL_ADVAL 0x00000040 /* add VALUE for output relocation, */ 438 /* only relevant to SPARC and */ 439 /* R_SPARC_RELATIVE */ 440 #define FLG_REL_GOTCL 0x00000080 /* clear the GOT entry. This is */ 441 /* relevant to RELA relocations, */ 442 /* not REL (i386) relocations */ 443 #define FLG_REL_MOVETAB 0x00000100 /* Relocation against .SUNW_move */ 444 /* adjustments required before */ 445 /* actual relocation */ 446 #define FLG_REL_NOINFO 0x00000200 /* Relocation comes from a section */ 447 /* with a null sh_info field */ 448 #define FLG_REL_REG 0x00000400 /* Relocation target is reg sym */ 449 #define FLG_REL_FPTR 0x00000800 /* relocation against func. desc. */ 450 #define FLG_REL_RFPTR1 0x00001000 /* Relative relocation against */ 451 /* 1st part of FD */ 452 #define FLG_REL_RFPTR2 0x00002000 /* Relative relocation against */ 453 /* 2nd part of FD */ 454 #define FLG_REL_DISP 0x00004000 /* *disp* relocation */ 455 #define FLG_REL_STLS 0x00008000 /* IE TLS reference to */ 456 /* static TLS GOT index */ 457 #define FLG_REL_DTLS 0x00010000 /* GD TLS reference relative to */ 458 /* dynamic TLS GOT index */ 459 #define FLG_REL_MTLS 0x00020000 /* LD TLS reference against GOT */ 460 #define FLG_REL_STTLS 0x00040000 /* LE TLS reference directly */ 461 /* to static tls index */ 462 #define FLG_REL_TLSFIX 0x00080000 /* relocation points to TLS instr. */ 463 /* which needs updating */ 464 #define FLG_REL_RELA 0x00100000 /* descripter captures a Rela */ 465 #define FLG_REL_GOTFIX 0x00200000 /* relocation points to GOTOP instr. */ 466 /* which needs updating */ 467 #define FLG_REL_NADDEND 0x00400000 /* Replace implicit addend in dest */ 468 /* with value in rel_raddend */ 469 /* Relevant to REL (i386) */ 470 /* relocations, not to RELA. */ 471 472 /* 473 * Structure to hold a cache of Relocations. 474 */ 475 struct rel_cache { 476 Rel_desc *rc_end; 477 Rel_desc *rc_free; 478 }; 479 480 /* 481 * Symbol value descriptor. For relocatable objects, each symbols value is 482 * its offset within its associated section. Therefore, to uniquely define 483 * each symbol within a reloctable object, record and sort the sh_offset and 484 * symbol value. This information is used to seach for displacement 485 * relocations as part of copy relocation validation. 486 */ 487 typedef struct { 488 Addr ssv_value; 489 Sym_desc *ssv_sdp; 490 } Ssv_desc; 491 492 /* 493 * Input file processing structures. 494 */ 495 struct ifl_desc { /* input file descriptor */ 496 const char *ifl_name; /* full file name */ 497 const char *ifl_soname; /* shared object name */ 498 dev_t ifl_stdev; /* device id and inode number for .so */ 499 ino_t ifl_stino; /* multiple inclusion checks */ 500 Ehdr *ifl_ehdr; /* elf header describing this file */ 501 Elf *ifl_elf; /* elf descriptor for this file */ 502 Sym_desc **ifl_oldndx; /* original symbol table indices */ 503 Sym_desc *ifl_locs; /* symbol desc version of locals */ 504 Ssv_desc *ifl_sortsyms; /* sorted list of symbols by value */ 505 Word ifl_locscnt; /* no. of local symbols to process */ 506 Word ifl_symscnt; /* total no. of symbols to process */ 507 Word ifl_sortcnt; /* no. of sorted symbols to process */ 508 Word ifl_shnum; /* number of sections in file */ 509 Word ifl_shstrndx; /* index to .shstrtab */ 510 Word ifl_vercnt; /* number of versions in file */ 511 Is_desc **ifl_isdesc; /* isdesc[scn ndx] = Is_desc ptr */ 512 Sdf_desc *ifl_sdfdesc; /* control definition */ 513 Versym *ifl_versym; /* version symbol table array */ 514 Ver_index *ifl_verndx; /* verndx[ver ndx] = Ver_index */ 515 List ifl_verdesc; /* version descriptor list */ 516 List ifl_relsect; /* relocation section list */ 517 Alist *ifl_groups; /* SHT_GROUP section list */ 518 Half ifl_neededndx; /* index to NEEDED in .dyn section */ 519 Word ifl_flags; /* Explicit/implicit reference */ 520 }; 521 522 #define FLG_IF_CMDLINE 0x00000001 /* full filename specified from the */ 523 /* command line (no -l) */ 524 #define FLG_IF_NEEDED 0x00000002 /* shared object should be recorded */ 525 #define FLG_IF_DIRECT 0x00000004 /* establish direct bindings to this */ 526 /* object */ 527 #define FLG_IF_EXTRACT 0x00000008 /* file extracted from an archive */ 528 #define FLG_IF_VERNEED 0x00000010 /* version dependency information is */ 529 /* required */ 530 #define FLG_IF_DEPREQD 0x00000020 /* dependency is required to satisfy */ 531 /* symbol references */ 532 #define FLG_IF_NEEDSTR 0x00000040 /* dependency specified by -Nn */ 533 /* flag */ 534 #define FLG_IF_IGNORE 0x00000080 /* ignore unused dependencies */ 535 #define FLG_IF_NODIRECT 0x00000100 /* object contains symbols that */ 536 /* cannot be directly bound to. */ 537 #define FLG_IF_LAZYLD 0x00000200 /* bindings to this object should be */ 538 /* lazy loaded */ 539 #define FLG_IF_GRPPRM 0x00000400 /* this dependency should have the */ 540 /* DF_P1_GROUPPERM flag set */ 541 #define FLG_IF_DISPPEND 0x00000800 /* displacement relocation done */ 542 /* in the ld time. */ 543 #define FLG_IF_DISPDONE 0x00001000 /* displacement relocation done */ 544 /* at the run time */ 545 #define FLG_IF_MAPFILE 0x00002000 /* file is a mapfile */ 546 #define FLG_IF_HSTRTAB 0x00004000 /* file has a string section */ 547 #define FLG_IF_FILEREF 0x00008000 /* file contains a section which */ 548 /* is included in the output */ 549 /* allocatable image */ 550 #define FLG_IF_GNUVER 0x00010000 /* file used GNU-style versioning */ 551 #define FLG_IF_ORDERED 0x00020000 /* ordered section processing */ 552 /* required */ 553 554 struct is_desc { /* input section descriptor */ 555 const char *is_name; /* original section name */ 556 Shdr *is_shdr; /* the elf section header */ 557 Ifl_desc *is_file; /* infile desc for this section */ 558 Os_desc *is_osdesc; /* new output section for this */ 559 /* input section */ 560 Elf_Data *is_indata; /* input sections raw data */ 561 Is_desc *is_symshndx; /* related SHT_SYM_SHNDX section */ 562 Word is_scnndx; /* original section index in file */ 563 Word is_txtndx; /* Index for section. Used to decide */ 564 /* where to insert section when */ 565 /* reordering sections */ 566 Word is_keyident; /* key for SHF_ORDERED processing */ 567 /* and identifier used for */ 568 /* placing/ordering sections */ 569 Word is_flags; /* Various flags */ 570 }; 571 572 #define FLG_IS_ORDERED 0x0001 /* this is a SHF_ORDERED section */ 573 #define FLG_IS_KEY 0x0002 /* section requires sort keys */ 574 #define FLG_IS_DISCARD 0x0004 /* section is to be discarded */ 575 #define FLG_IS_RELUPD 0x0008 /* symbol defined here may have moved */ 576 #define FLG_IS_SECTREF 0x0010 /* section has been referenced */ 577 #define FLG_IS_GDATADEF 0x0020 /* section contains global data sym */ 578 #define FLG_IS_EXTERNAL 0x0040 /* isp from an user file */ 579 #define FLG_IS_INSTRMRG 0x0080 /* Usable SHF_MERGE|SHF_STRINGS sec */ 580 #define FLG_IS_GNSTRMRG 0x0100 /* Generated mergeable string section */ 581 #define FLG_IS_GROUPS 0x0200 /* section has groups to process */ 582 #define FLG_IS_PLACE 0x0400 /* section requires to be placed */ 583 #define FLG_IS_COMDAT 0x0800 /* section is COMDAT */ 584 585 /* 586 * Map file and output file processing structures 587 */ 588 struct os_desc { /* Output section descriptor */ 589 const char *os_name; /* the section name */ 590 Elf_Scn *os_scn; /* the elf section descriptor */ 591 Shdr *os_shdr; /* the elf section header */ 592 Os_desc *os_relosdesc; /* the output relocation section */ 593 List os_relisdescs; /* reloc input section descriptors */ 594 /* for this output section */ 595 List os_isdescs; /* list of input sections in output */ 596 APlist *os_mstrisdescs; /* FLG_IS_INSTRMRG input sections */ 597 Sort_desc *os_sort; /* used for sorting sections */ 598 Sg_desc *os_sgdesc; /* segment os_desc is placed on */ 599 Elf_Data *os_outdata; /* output sections raw data */ 600 APlist *os_comdats; /* list of COMDAT sections present */ 601 /* in current output section */ 602 Word os_scnsymndx; /* index in output symtab of section */ 603 /* symbol for this section */ 604 Word os_txtndx; /* Index for section. Used to decide */ 605 /* where to insert section when */ 606 /* reordering sections */ 607 Xword os_szoutrels; /* size of output relocation section */ 608 uint_t os_namehash; /* hash on section name */ 609 uchar_t os_flags; /* various flags */ 610 }; 611 612 #define FLG_OS_KEY 0x01 /* section requires sort keys */ 613 #define FLG_OS_OUTREL 0x02 /* output rel against this section */ 614 #define FLG_OS_SECTREF 0x04 /* isps are not affected by -zignore */ 615 616 /* 617 * For sorting sections. 618 */ 619 struct sort_desc { 620 Is_desc **st_order; 621 Word st_ordercnt; 622 Is_desc **st_before; 623 Word st_beforecnt; 624 Is_desc **st_after; 625 Word st_aftercnt; 626 }; 627 628 struct sg_desc { /* output segment descriptor */ 629 Phdr sg_phdr; /* segment header for output file */ 630 const char *sg_name; /* segment name */ 631 Xword sg_round; /* data rounding required (mapfile) */ 632 Xword sg_length; /* maximum segment length; if 0 */ 633 /* segment is not specified */ 634 APlist *sg_osdescs; /* list of output section descriptors */ 635 APlist *sg_secorder; /* list specifying section ordering */ 636 /* for the segment */ 637 Half sg_flags; 638 Sym_desc *sg_sizesym; /* size symbol for this segment */ 639 Xword sg_addralign; /* LCM of sh_addralign */ 640 Elf_Scn *sg_fscn; /* the SCN of the first section. */ 641 }; 642 643 #define FLG_SG_VADDR 0x0001 /* vaddr segment attribute set */ 644 #define FLG_SG_PADDR 0x0002 /* paddr segment attribute set */ 645 #define FLG_SG_LENGTH 0x0004 /* length segment attribute set */ 646 #define FLG_SG_ALIGN 0x0008 /* align segment attribute set */ 647 #define FLG_SG_ROUND 0x0010 /* round segment attribute set */ 648 #define FLG_SG_FLAGS 0x0020 /* flags segment attribute set */ 649 #define FLG_SG_TYPE 0x0040 /* type segment attribute set */ 650 #define FLG_SG_ORDER 0x0080 /* has ordering been turned on for */ 651 /* this segment. */ 652 /* i.e. ?[O] option in mapfile */ 653 #define FLG_SG_NOHDR 0x0100 /* don't map ELF or phdrs into */ 654 /* this segment */ 655 #define FLG_SG_EMPTY 0x0200 /* an empty segment specification */ 656 /* no input sections will be */ 657 /* associated to this section */ 658 #define FLG_SG_KEY 0x0400 /* segment requires sort keys */ 659 #define FLG_SG_DISABLED 0x0800 /* this segment is disabled */ 660 #define FLG_SG_PHREQ 0x1000 /* this segment requires a program */ 661 /* header */ 662 663 struct sec_order { 664 const char *sco_secname; /* section name to be ordered */ 665 Word sco_index; /* ordering index for section */ 666 Half sco_flags; 667 }; 668 669 #define FLG_SGO_USED 0x0001 /* was ordering used? */ 670 671 struct ent_desc { /* input section entrance criteria */ 672 List ec_files; /* files from which to accept */ 673 /* sections */ 674 const char *ec_name; /* name to match (NULL if none) */ 675 Word ec_type; /* section type */ 676 Word ec_attrmask; /* section attribute mask (AWX) */ 677 Word ec_attrbits; /* sections attribute bits */ 678 Sg_desc *ec_segment; /* output segment to enter if matched */ 679 Word ec_ndx; /* index to determine where section */ 680 /* meeting this criteria should */ 681 /* inserted. Used for reordering */ 682 /* of sections. */ 683 Half ec_flags; 684 }; 685 686 #define FLG_EC_USED 0x0001 /* entrance criteria met? */ 687 688 /* 689 * Move supplementary structures 690 * Sorted by symbol local/global and then by name. 691 */ 692 typedef struct psym_info { 693 Sym_desc *psym_symd; /* partially initialized symbol */ 694 Word psym_num; /* number of move entires */ 695 Half psym_flag; /* various flag */ 696 List psym_mvs; /* the list of move entries */ 697 } Psym_info; 698 699 #define FLG_PSYM_OVERLAP 0x01 /* Overlapping */ 700 701 /* 702 * One structure is allocated for a move entry. 703 */ 704 typedef struct mv_itm { 705 Xword mv_start; /* start position */ 706 Xword mv_length; /* The length of initialization */ 707 Half mv_flag; /* various flags */ 708 Is_desc *mv_isp; /* input desc. this entry is from */ 709 Move *mv_ientry; /* Input Move_entry */ 710 Word mv_oidx; /* Output Move_entry index */ 711 } Mv_itm; 712 713 #define FLG_MV_OUTSECT 0x01 /* Will be in move section */ 714 715 /* 716 * Define a move descripter used within relocation structures. 717 */ 718 struct mv_desc { 719 Move *mvd_move; 720 Sym_desc *mvd_sym; 721 }; 722 723 struct sym_desc { 724 List sd_GOTndxs; /* list of associated GOT entries */ 725 Sym *sd_sym; /* pointer to symbol table entry */ 726 Sym *sd_osym; /* copy of the original symbol entry */ 727 /* used only for local partial */ 728 Psym_info *sd_psyminfo; /* for partial symbols, maintain a */ 729 /* pointer to parsym_info */ 730 const char *sd_name; /* symbols name */ 731 Ifl_desc *sd_file; /* file where symbol is taken */ 732 Is_desc *sd_isc; /* input section of symbol definition */ 733 Sym_aux *sd_aux; /* auxiliary global symbol info. */ 734 Word sd_symndx; /* index in output symbol table */ 735 Word sd_shndx; /* sect. index sym is associated w/ */ 736 Word sd_flags; /* state flags */ 737 Half sd_flags1; /* more symbol flags */ 738 Half sd_ref; /* reference definition of symbol */ 739 }; 740 741 /* 742 * The auxiliary symbol descriptor contains the additional information (beyond 743 * the symbol descriptor) required to process global symbols. These symbols are 744 * accessed via an internal symbol hash table where locality of reference is 745 * important for performance. 746 */ 747 struct sym_aux { 748 List sa_dfiles; /* files where symbol is defined */ 749 Sym sa_sym; /* copy of symtab entry */ 750 const char *sa_vfile; /* first unavailable definition */ 751 Ifl_desc *sa_bindto; /* symbol to bind to - for translator */ 752 const char *sa_rfile; /* file with first symbol referenced */ 753 Word sa_hash; /* the pure hash value of symbol */ 754 Word sa_PLTndx; /* index into PLT for symbol */ 755 Word sa_PLTGOTndx; /* GOT entry indx for PLT indirection */ 756 Word sa_linkndx; /* index of associated symbol from */ 757 /* ET_DYN file */ 758 Half sa_symspec; /* special symbol ids */ 759 Half sa_overndx; /* output file versioning index */ 760 Half sa_dverndx; /* dependency versioning index */ 761 }; 762 763 /* 764 * Nodes used to track symbols in the global AVL symbol dictionary. 765 */ 766 struct sym_avlnode { 767 avl_node_t sav_node; /* AVL node */ 768 Word sav_hash; /* symbol hash value */ 769 const char *sav_name; /* symbol name */ 770 Sym_desc *sav_symdesc; /* SymDesc entry */ 771 }; 772 773 /* 774 * These are the ids for processing of `Special symbols'. They are used 775 * to set the sym->sd_aux->sa_symspec field. 776 */ 777 #define SDAUX_ID_ETEXT 1 /* etext && _etext symbol */ 778 #define SDAUX_ID_EDATA 2 /* edata && _edata symbol */ 779 #define SDAUX_ID_END 3 /* end, _end, && _END_ symbol */ 780 #define SDAUX_ID_DYN 4 /* DYNAMIC && _DYNAMIC symbol */ 781 #define SDAUX_ID_PLT 5 /* _PROCEDURE_LINKAGE_TABLE_ symbol */ 782 #define SDAUX_ID_GOT 6 /* _GLOBAL_OFFSET_TABLE_ symbol */ 783 #define SDAUX_ID_START 7 /* START_ && _START_ symbol */ 784 785 /* 786 * Flags for sym_desc.sd_flags 787 */ 788 #define FLG_SY_MVTOCOMM 0x00000001 /* assign symbol to common (.bss) */ 789 /* this is a result of a */ 790 /* copy reloc against sym */ 791 #define FLG_SY_GLOBREF 0x00000002 /* a global reference has been seen */ 792 #define FLG_SY_WEAKDEF 0x00000004 /* a weak definition has been used */ 793 #define FLG_SY_CLEAN 0x00000008 /* `Sym' entry points to original */ 794 /* input file (read-only). */ 795 #define FLG_SY_UPREQD 0x00000010 /* symbol value update is required, */ 796 /* either it's used as an entry */ 797 /* point or for relocation, but */ 798 /* it must be updated even if */ 799 /* the -s flag is in effect */ 800 #define FLG_SY_NOTAVAIL 0x00000020 /* symbol is not available to the */ 801 /* application either because it */ 802 /* originates from an implicitly */ 803 /* referenced shared object, or */ 804 /* because it is not part of a */ 805 /* specified version. */ 806 #define FLG_SY_REDUCED 0x00000040 /* a global is reduced to local */ 807 #define FLG_SY_VERSPROM 0x00000080 /* version definition has been */ 808 /* promoted to output file */ 809 #define FLG_SY_PROT 0x00000100 /* stv_protected visibility seen */ 810 811 #define FLG_SY_MAPREF 0x00000200 /* symbol reference generated by user */ 812 /* from mapfile */ 813 #define FLG_SY_REFRSD 0x00000400 /* symbols sd_ref has been raised */ 814 /* due to a copy-relocs */ 815 /* weak-strong pairing */ 816 #define FLG_SY_INTPOSE 0x00000800 /* symbol defines an interposer */ 817 #define FLG_SY_INVALID 0x00001000 /* unwanted/erroneous symbol */ 818 #define FLG_SY_SMGOT 0x00002000 /* small got index assigned to symbol */ 819 /* sparc only */ 820 #define FLG_SY_PARENT 0x00004000 /* symbol to be found in parent */ 821 /* only used with direct bindings */ 822 #define FLG_SY_LAZYLD 0x00008000 /* symbol to cause lazyloading of */ 823 /* parent object */ 824 #define FLG_SY_ISDISC 0x00010000 /* symbol is a member of a DISCARDED */ 825 /* section (COMDAT) */ 826 #define FLG_SY_PAREXPN 0x00020000 /* partially init. symbol to be */ 827 /* expanded */ 828 #define FLG_SY_PLTPAD 0x00040000 /* pltpadding has been allocated for */ 829 /* this symbol */ 830 #define FLG_SY_REGSYM 0x00080000 /* REGISTER symbol (sparc only) */ 831 #define FLG_SY_SOFOUND 0x00100000 /* compared against an SO definition */ 832 #define FLG_SY_EXTERN 0x00200000 /* symbol is external, allows -zdefs */ 833 /* error suppression */ 834 #define FLG_SY_MAPUSED 0x00400000 /* mapfile symbol used (occurred */ 835 /* within a relocatable object) */ 836 #define FLG_SY_COMMEXP 0x00800000 /* COMMON symbol which has been */ 837 /* allocated */ 838 #define FLG_SY_CMDREF 0x01000000 /* symbol was referenced from the */ 839 /* command line. (ld -u <>, */ 840 /* ld -zrtldinfo=<>, ...) */ 841 #define FLG_SY_SPECSEC 0x02000000 /* section index is reserved value */ 842 /* ABS, COMMON, ... */ 843 #define FLG_SY_TENTSYM 0x04000000 /* tentative symbol */ 844 #define FLG_SY_VISIBLE 0x08000000 /* symbols visibility determined */ 845 #define FLG_SY_STDFLTR 0x10000000 /* symbol is a standard filter */ 846 #define FLG_SY_AUXFLTR 0x20000000 /* symbol is an auxiliary filter */ 847 #define FLG_SY_DYNSORT 0x40000000 /* req. in dyn[sym|tls]sort section */ 848 #define FLG_SY_NODYNSORT 0x80000000 /* excluded from dyn[sym_tls]sort sec */ 849 850 /* 851 * Sym_desc.sd_flags1 852 */ 853 #define FLG_SY1_DEFAULT 0x00000001 /* global symbol, default */ 854 #define FLG_SY1_SINGLE 0x00000002 /* global symbol, singleton defined */ 855 #define FLG_SY1_PROTECT 0x00000004 /* global symbol, protected defined */ 856 #define FLG_SY1_EXPORT 0x00000008 /* global symbol, exported defined */ 857 858 #define MSK_SY1_GLOBAL \ 859 (FLG_SY1_DEFAULT | FLG_SY1_SINGLE | FLG_SY1_PROTECT | FLG_SY1_EXPORT) 860 /* this mask indicates that the */ 861 /* symbol has been explicitly */ 862 /* defined within a mapfile */ 863 /* definition, and is a candidate */ 864 /* for versioning */ 865 866 #define FLG_SY1_HIDDEN 0x00000010 /* global symbol, reduce to local */ 867 #define FLG_SY1_ELIM 0x00000020 /* global symbol, eliminate */ 868 #define FLG_SY1_IGNORE 0x00000040 /* global symbol, ignored */ 869 870 #define MSK_SY1_LOCAL (FLG_SY1_HIDDEN | FLG_SY1_ELIM | FLG_SY1_IGNORE) 871 /* this mask allows all local state */ 872 /* flags to be removed when the */ 873 /* symbol is copy relocated */ 874 875 #define FLG_SY1_EXPDEF 0x00000100 /* symbol visibility defined */ 876 /* explicitly */ 877 878 #define MSK_SY1_NOAUTO (FLG_SY1_SINGLE | FLG_SY1_EXPORT | FLG_SY1_EXPDEF) 879 /* this mask indicates that the */ 880 /* symbol is not a candidate for */ 881 /* auto-reduction/elimination */ 882 883 #define FLG_SY1_MAPFILE 0x00000200 /* symbol attribute defined in a */ 884 /* mapfile */ 885 #define FLG_SY1_DIR 0x00000400 /* global symbol, direct bindings */ 886 #define FLG_SY1_NDIR 0x00000800 /* global symbol, nondirect bindings */ 887 888 /* 889 * Create a mask for (sym.st_other & visibility) since the gABI does not yet 890 * define a ELF*_ST_OTHER macro. 891 */ 892 #define MSK_SYM_VISIBILITY 0x7 893 894 /* 895 * Structure to manage the shared object definition lists. There are two lists 896 * that use this structure: 897 * 898 * o ofl_soneed; maintain the list of implicitly required dependencies 899 * (ie. shared objects needed by other shared objects). These definitions 900 * may include RPATH's required to locate the dependencies, and any 901 * version requirements. 902 * 903 * o ofl_socntl; maintains the shared object control definitions. These are 904 * provided by the user (via a mapfile) and are used to indicate any 905 * SONAME translations and verion control requirements. 906 */ 907 struct sdf_desc { 908 const char *sdf_name; /* the shared objects file name */ 909 const char *sdf_soname; /* the shared objects SONAME */ 910 char *sdf_rpath; /* library search path DT_RPATH */ 911 const char *sdf_rfile; /* referencing file for diagnostics */ 912 Ifl_desc *sdf_file; /* the final input file descriptor */ 913 List sdf_vers; /* list of versions that are required */ 914 /* from this object */ 915 List sdf_verneed; /* list of VERNEEDS to create for */ 916 /* this object (via SPECVERS or */ 917 /* ADDVERS) */ 918 Word sdf_flags; 919 }; 920 921 #define FLG_SDF_SONAME 0x02 /* An alternative SONAME is supplied */ 922 #define FLG_SDF_SELECT 0x04 /* version control selection required */ 923 #define FLG_SDF_VERIFY 0x08 /* version definition verification */ 924 /* required */ 925 #define FLG_SDF_SPECVER 0x10 /* specify VERNEEDS */ 926 #define FLG_SDF_ADDVER 0x20 /* add VERNEED references */ 927 928 /* 929 * Structure to manage shared object version usage requirements. 930 */ 931 struct sdv_desc { 932 const char *sdv_name; /* version name */ 933 const char *sdv_ref; /* versions reference */ 934 Word sdv_flags; /* flags */ 935 }; 936 937 #define FLG_SDV_MATCHED 0x01 /* VERDEF found and matched */ 938 939 /* 940 * Structures to manage versioning information. Two versioning structures are 941 * defined: 942 * 943 * o a version descriptor maintains a linked list of versions and their 944 * associated dependencies. This is used to build the version definitions 945 * for an image being created (see map_symbol), and to determine the 946 * version dependency graph for any input files that are versioned. 947 * 948 * o a version index array contains each version of an input file that is 949 * being processed. It informs us which versions are available for 950 * binding, and is used to generate any version dependency information. 951 */ 952 struct ver_desc { 953 const char *vd_name; /* version name */ 954 Word vd_hash; /* hash value of name */ 955 Ifl_desc *vd_file; /* file that defined version */ 956 Half vd_ndx; /* coordinates with symbol index */ 957 Half vd_flags; /* version information */ 958 List vd_deps; /* version dependencies */ 959 Ver_desc *vd_ref; /* dependency's first reference */ 960 }; 961 962 struct ver_index { 963 const char *vi_name; /* dependency version name */ 964 Half vi_flags; /* communicates availability */ 965 Half vi_overndx; /* Index asssigned to this version in */ 966 /* output object Verneed section */ 967 Ver_desc *vi_desc; /* cross reference to descriptor */ 968 }; 969 970 /* 971 * Define any internal version descriptor flags ([vd|vi]_flags). Note that the 972 * first byte is reserved for user visible flags (refer VER_FLG's in link.h). 973 */ 974 #define MSK_VER_USER 0x0f /* mask for user visible flags */ 975 976 #define FLG_VER_AVAIL 0x10 /* version is available for binding */ 977 #define FLG_VER_REFER 0x20 /* version has been referenced */ 978 #define FLG_VER_SPECVER 0x40 /* via $SPECVERS in mapfile. */ 979 /* Cannot be normalized away */ 980 #define FLG_VER_CYCLIC 0x80 /* a member of cyclic dependency */ 981 982 /* 983 * isalist(1) descriptor - used to break an isalist string into its component 984 * options. 985 */ 986 struct isa_opt { 987 char *isa_name; /* individual isa option name */ 988 size_t isa_namesz; /* and associated size */ 989 }; 990 991 struct isa_desc { 992 char *isa_list; /* sysinfo(SI_ISALIST) list */ 993 size_t isa_listsz; /* and associated size */ 994 Isa_opt *isa_opt; /* table of individual isa options */ 995 size_t isa_optno; /* and associated number */ 996 }; 997 998 /* 999 * uname(2) descriptor - used to break a utsname structure into its component 1000 * options (at least those that we're interested in). 1001 */ 1002 struct uts_desc { 1003 char *uts_osname; /* operating system name */ 1004 size_t uts_osnamesz; /* and associated size */ 1005 char *uts_osrel; /* operating system release */ 1006 size_t uts_osrelsz; /* and associated size */ 1007 }; 1008 1009 /* 1010 * SHT_GROUP descriptor - used to track group sections at the global 1011 * level to resolve conflicts and determine which to keep. 1012 */ 1013 struct group_desc { 1014 Is_desc *gd_isc; /* input section descriptor */ 1015 Is_desc *gd_oisc; /* overriding input section */ 1016 /* descriptor when discarded */ 1017 const char *gd_name; /* group name (signature symbol) */ 1018 Word *gd_data; /* data for group section */ 1019 size_t gd_cnt; /* number of entries in group data */ 1020 }; 1021 1022 /* 1023 * Indexes into the ld_support_funcs[] table. 1024 */ 1025 typedef enum { 1026 LDS_VERSION = 0, /* Must be first and have value 0 */ 1027 LDS_INPUT_DONE, 1028 LDS_START, 1029 LDS_ATEXIT, 1030 LDS_OPEN, 1031 LDS_FILE, 1032 LDS_INSEC, 1033 LDS_SEC, 1034 LDS_NUM 1035 } Support_ndx; 1036 1037 /* 1038 * Structure to manage archive member caching. Each archive has an archive 1039 * descriptor (Ar_desc) associated with it. This contains pointers to the 1040 * archive symbol table (obtained by elf_getarsyms(3e)) and an auxiliary 1041 * structure (Ar_uax[]) that parallels this symbol table. The member element 1042 * of this auxiliary table indicates whether the archive member associated with 1043 * the symbol offset has already been extracted (AREXTRACTED) or partially 1044 * processed (refer process_member()). 1045 */ 1046 typedef struct ar_mem { 1047 Elf *am_elf; /* elf descriptor for this member */ 1048 char *am_name; /* members name */ 1049 char *am_path; /* path (ie. lib(foo.o)) */ 1050 Sym *am_syms; /* start of global symbols */ 1051 char *am_strs; /* associated string table start */ 1052 Xword am_symn; /* no. of global symbols */ 1053 } Ar_mem; 1054 1055 typedef struct ar_aux { 1056 Sym_desc *au_syms; /* internal symbol descriptor */ 1057 Ar_mem *au_mem; /* associated member */ 1058 } Ar_aux; 1059 1060 #define FLG_ARMEM_PROC (Ar_mem *)-1 1061 1062 typedef struct ar_desc { 1063 const char *ad_name; /* archive file name */ 1064 Elf *ad_elf; /* elf descriptor for the archive */ 1065 Elf_Arsym *ad_start; /* archive symbol table start */ 1066 Ar_aux *ad_aux; /* auxiliary symbol information */ 1067 dev_t ad_stdev; /* device id and inode number for */ 1068 ino_t ad_stino; /* multiple inclusion checks */ 1069 ofl_flag_t ad_flags; /* archive specific cmd line flags */ 1070 } Ar_desc; 1071 1072 /* 1073 * Define any archive descriptor flags. NOTE, make sure they do not clash with 1074 * any output file descriptor archive extraction flags, as these are saved in 1075 * the same entry (see MSK_OF1_ARCHIVE). 1076 */ 1077 #define FLG_ARD_EXTRACT 0x00010000 /* archive member has been extracted */ 1078 1079 /* 1080 * Function Declarations. 1081 */ 1082 #if defined(_ELF64) 1083 1084 #define ld_create_outfile ld64_create_outfile 1085 #define ld_ent_setup ld64_ent_setup 1086 #define ld_init_strings ld64_init_strings 1087 #define ld_init_target ld64_init_target 1088 #define ld_make_sections ld64_make_sections 1089 #define ld_main ld64_main 1090 #define ld_ofl_cleanup ld64_ofl_cleanup 1091 #define ld_process_mem ld64_process_mem 1092 #define ld_reloc_init ld64_reloc_init 1093 #define ld_reloc_process ld64_reloc_process 1094 #define ld_sym_validate ld64_sym_validate 1095 #define ld_update_outfile ld64_update_outfile 1096 1097 #else 1098 1099 #define ld_create_outfile ld32_create_outfile 1100 #define ld_ent_setup ld32_ent_setup 1101 #define ld_init_strings ld32_init_strings 1102 #define ld_init_target ld32_init_target 1103 #define ld_make_sections ld32_make_sections 1104 #define ld_main ld32_main 1105 #define ld_ofl_cleanup ld32_ofl_cleanup 1106 #define ld_process_mem ld32_process_mem 1107 #define ld_reloc_init ld32_reloc_init 1108 #define ld_reloc_process ld32_reloc_process 1109 #define ld_sym_validate ld32_sym_validate 1110 #define ld_update_outfile ld32_update_outfile 1111 1112 #endif 1113 1114 extern int ld_getopt(Lm_list *, int, int, char **); 1115 1116 extern int ld32_main(int, char **, Half); 1117 extern int ld64_main(int, char **, Half); 1118 1119 extern uintptr_t ld_create_outfile(Ofl_desc *); 1120 extern uintptr_t ld_ent_setup(Ofl_desc *, Xword); 1121 extern uintptr_t ld_init_strings(Ofl_desc *); 1122 extern int ld_init_target(Lm_list *, Half mach); 1123 extern uintptr_t ld_make_sections(Ofl_desc *); 1124 extern void ld_ofl_cleanup(Ofl_desc *); 1125 extern Ifl_desc *ld_process_mem(const char *, const char *, char *, 1126 size_t, Ofl_desc *, Rej_desc *); 1127 extern uintptr_t ld_reloc_init(Ofl_desc *); 1128 extern uintptr_t ld_reloc_process(Ofl_desc *); 1129 extern uintptr_t ld_sym_validate(Ofl_desc *); 1130 extern uintptr_t ld_update_outfile(Ofl_desc *); 1131 1132 #ifdef __cplusplus 1133 } 1134 #endif 1135 1136 #endif /* _LIBLD_H */ 1137