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 #pragma ident "%Z%%M% %I% %E% SMI" 34 35 #include <stdlib.h> 36 #include <libelf.h> 37 #include <sgs.h> 38 #include <_machelf.h> 39 #include <string_table.h> 40 #include <sys/avl.h> 41 #include <alist.h> 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 /* 48 * Default directory search path manipulation for the link-editor. YLDIR 49 * indicates which directory in LIBPATH is replaced by the -YL option to cc 50 * and ld. YUDIR indicates which directory is replaced by -YU. 51 */ 52 #define YLDIR 1 53 #define YUDIR 2 54 55 /* 56 * Define a hash value that can never be returned from elf_hash(). 57 */ 58 #define SYM_NOHASH (~(Word)0) 59 60 /* 61 * Macro that can be used to represent both ORDER flags 62 * in a section header. 63 */ 64 #define ALL_SHF_ORDER (SHF_ORDERED | SHF_LINK_ORDER) 65 66 /* 67 * The linker merges (concatenates) sections with the same name and 68 * compatible section header flags. When comparing these flags, 69 * there are some that should not be included in the decision. 70 * The ALL_SHF_IGNORE constant defines these flags. 71 * 72 * NOTE: SHF_MERGE|SHF_STRINGS: 73 * The compiler is allowed to set the SHF_MERGE|SHF_STRINGS flags in 74 * order to tell the linker that: 75 * 76 * 1) There is nothing in the section except null terminated strings. 77 * 2) Those strings do not contain NULL bytes, except as termination. 78 * 3) All references to these strings occur via standard relocation 79 * records. 80 * 81 * As a result, if two compatible sections both have these flags set, it is 82 * OK to combine the strings they contain into a single merged string table 83 * with duplicates removed and tail strings merged. 84 * 85 * This is a different meaning than the simple concatenating of sections 86 * that the linker always does. It is a hint that an additional optimization 87 * is possible, but not required. This means that sections that do not 88 * share the same SHF_MERGE|SHF_STRINGS values can be concatenated, 89 * but cannot have their duplicate strings combined. Hence, the 90 * SHF_MERGE|SHF_STRINGS flags should be ignored when deciding whether 91 * two sections can be concatenated. 92 */ 93 #define ALL_SHF_IGNORE (ALL_SHF_ORDER | SHF_GROUP | SHF_MERGE | SHF_STRINGS) 94 95 /* 96 * Define symbol reference types for use in symbol resolution. 97 */ 98 typedef enum { 99 REF_DYN_SEEN, /* a .so symbol has been seen */ 100 REF_DYN_NEED, /* a .so symbol satisfies a .o symbol */ 101 REF_REL_NEED, /* a .o symbol */ 102 REF_NUM /* the number of symbol references */ 103 } Symref; 104 105 106 /* 107 * GOT reference models 108 */ 109 typedef enum { 110 GOT_REF_GENERIC, /* generic symbol reference */ 111 GOT_REF_TLSIE, /* TLS initial exec (gnu) reference */ 112 GOT_REF_TLSLD, /* TLS local dynamic reference */ 113 GOT_REF_TLSGD /* TLS general dynamic reference */ 114 } Gotref; 115 116 typedef struct { 117 Xword gn_addend; /* addend associated with GOT entry */ 118 Sword gn_gotndx; /* GOT table index */ 119 Gotref gn_gotref; 120 } Gotndx; 121 122 /* 123 * Got debugging structure. The got index is defined as a signed value as we 124 * do so much mucking around with negative and positive gots on SPARC, and sign 125 * extension is necessary when building 64-bit objects. On intel we explicitly 126 * cast this variable to an unsigned value. 127 */ 128 typedef struct { 129 Sym_desc * gt_sym; 130 Gotndx gt_gndx; 131 } Gottable; 132 133 134 /* 135 * Output file processing structure 136 */ 137 typedef Lword ofl_flag_t; 138 struct ofl_desc { 139 char *ofl_sgsid; /* link-editor identification */ 140 const char *ofl_name; /* full file name */ 141 Elf *ofl_elf; /* elf_memory() elf descriptor */ 142 Elf *ofl_welf; /* ELF_C_WRITE elf descriptor */ 143 Ehdr *ofl_dehdr; /* default elf header, and new elf */ 144 Ehdr *ofl_nehdr; /* header describing this file */ 145 Phdr *ofl_phdr; /* program header descriptor */ 146 Phdr *ofl_tlsphdr; /* TLS phdr */ 147 int ofl_fd; /* file descriptor */ 148 size_t ofl_size; /* image size */ 149 List ofl_maps; /* list of input mapfiles */ 150 List ofl_segs; /* list of segments */ 151 List ofl_ents; /* list of entrance descriptors */ 152 List ofl_objs; /* relocatable object file list */ 153 Word ofl_objscnt; /* and count */ 154 List ofl_ars; /* archive library list */ 155 Word ofl_arscnt; /* and count */ 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 Xword ofl_segorigin; /* segment origin (start) */ 195 void *ofl_entry; /* entry point (-e and Sym_desc *) */ 196 char *ofl_filtees; /* shared objects we are a filter for */ 197 const char *ofl_soname; /* (-h option) output file name for */ 198 /* dynamic structure */ 199 const char *ofl_interp; /* interpreter name used by exec() */ 200 char *ofl_rpath; /* run path to store in .dynamic */ 201 char *ofl_config; /* config path to store in .dynamic */ 202 List ofl_ulibdirs; /* user supplied library search list */ 203 List ofl_dlibdirs; /* default library search list */ 204 Word ofl_vercnt; /* number of versions to generate */ 205 List ofl_verdesc; /* list of version descriptors */ 206 size_t ofl_verdefsz; /* size of version definition section */ 207 size_t ofl_verneedsz; /* size of version needed section */ 208 Word ofl_entercnt; /* no. of global symbols entered */ 209 Word ofl_globcnt; /* no. of global symbols to output */ 210 Word ofl_scopecnt; /* no. of scoped symbols to output */ 211 Word ofl_dynscopecnt; /* no. scoped syms in .SUNW_ldynsym */ 212 Word ofl_elimcnt; /* no. of eliminated symbols */ 213 Word ofl_locscnt; /* no. of local symbols in .symtab */ 214 Word ofl_dynlocscnt; /* no. local symbols in .SUNW_ldynsym */ 215 Word ofl_dynsymsortcnt; /* no. ndx in .SUNW_dynsymsort */ 216 Word ofl_dyntlssortcnt; /* no. ndx in .SUNW_dyntlssort */ 217 Word ofl_dynshdrcnt; /* no. of output section in .dynsym */ 218 Word ofl_shdrcnt; /* no. of output sections */ 219 Str_tbl *ofl_shdrsttab; /* Str_tbl for shdr strtab */ 220 Str_tbl *ofl_strtab; /* Str_tbl for symtab strtab */ 221 Str_tbl *ofl_dynstrtab; /* Str_tbl for dymsym strtab */ 222 Gotndx *ofl_tlsldgotndx; /* index to LD TLS_index structure */ 223 Xword ofl_relocsz; /* size of output relocations */ 224 Xword ofl_relocgotsz; /* size of .got relocations */ 225 Xword ofl_relocpltsz; /* size of .plt relocations */ 226 Xword ofl_relocbsssz; /* size of .bss (copy) relocations */ 227 Xword ofl_relocrelsz; /* size of .rel[a] relocations */ 228 Word ofl_relocincnt; /* no. of input relocations */ 229 Word ofl_reloccnt; /* tot number of output relocations */ 230 Word ofl_reloccntsub; /* tot numb of output relocations to */ 231 /* skip (-zignore) */ 232 Word ofl_relocrelcnt; /* tot number of relative */ 233 /* relocations */ 234 Word ofl_gotcnt; /* no. of .got entries */ 235 Word ofl_pltcnt; /* no. of .plt entries */ 236 Word ofl_pltpad; /* no. of .plt padd entries */ 237 Word ofl_hashbkts; /* no. of hash buckets required */ 238 Is_desc *ofl_isbss; /* .bss input section (globals) */ 239 Is_desc *ofl_islbss; /* .lbss input section (globals) */ 240 Is_desc *ofl_istlsbss; /* .tlsbss input section (globals) */ 241 Is_desc *ofl_issunwdata1; /* .data input section */ 242 /* partially expanded. */ 243 Is_desc *ofl_issunwbss; /* .SUNW_bss input section (globals) */ 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_sunwdata1ndx; /* section index for sunwdata1 */ 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 */ 312 313 #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 */ 332 333 /* 334 * In the flags1 arena, establish any options that are applicable to archive 335 * extraction first, and associate a mask. These values are recorded with any 336 * archive descriptor so that they may be reset should the archive require a 337 * rescan to try and resolve undefined symbols. 338 */ 339 #define FLG_OF1_ALLEXRT 0x00000001 /* extract all members from an */ 340 /* archive file */ 341 #define FLG_OF1_WEAKEXT 0x00000002 /* allow archive extraction to */ 342 /* resolve weak references */ 343 #define MSK_OF1_ARCHIVE 0x00000003 /* archive flags mask */ 344 345 #define FLG_OF1_NOINTRP 0x00000008 /* -z nointerp flag set */ 346 #define FLG_OF1_ZDIRECT 0x00000010 /* -z direct flag set */ 347 #define FLG_OF1_NDIRECT 0x00000020 /* no-direct bindings specified */ 348 #define FLG_OF1_OVHWCAP 0x00000040 /* override any input hardware or */ 349 #define FLG_OF1_OVSFCAP 0x00000080 /* software capabilities */ 350 #define FLG_OF1_RELDYN 0x00000100 /* process .dynamic in rel obj */ 351 352 #define FLG_OF1_IGNORE 0x00000800 /* ignore unused dependencies */ 353 354 #define FLG_OF1_TEXTOFF 0x00002000 /* text relocations are ok */ 355 #define FLG_OF1_ABSEXEC 0x00004000 /* -zabsexec set */ 356 #define FLG_OF1_LAZYLD 0x00008000 /* lazy loading of objects enabled */ 357 #define FLG_OF1_GRPPRM 0x00010000 /* dependencies are to have */ 358 /* GROUPPERM enabled */ 359 #define FLG_OF1_OVRFLW 0x00020000 /* size exceeds 32-bit limitation */ 360 /* of 32-bit libld */ 361 #define FLG_OF1_NOPARTI 0x00040000 /* -znopartial set */ 362 #define FLG_OF1_BSSOREL 0x00080000 /* output relocation against bss */ 363 /* section */ 364 #define FLG_OF1_TLSOREL 0x00100000 /* output relocation against .tlsbss */ 365 /* section */ 366 #define FLG_OF1_MEMORY 0x00200000 /* produce a memory model */ 367 #define FLG_OF1_RLXREL 0x00400000 /* -z relaxreloc flag set */ 368 #define FLG_OF1_ENCDIFF 0x00800000 /* Host running linker has different */ 369 /* byte order than output object */ 370 #define FLG_OF1_VADDR 0x01000000 /* vaddr was explicitly set */ 371 #define FLG_OF1_EXTRACT 0x02000000 /* archive member has been extracted */ 372 #define FLG_OF1_RESCAN 0x04000000 /* any archives should be rescanned */ 373 #define FLG_OF1_IGNPRC 0x08000000 /* ignore processing required */ 374 #define FLG_OF1_NCSTTAB 0x10000000 /* -znocompstrtab set */ 375 #define FLG_OF1_DONE 0x20000000 /* link-editor processing complete */ 376 #define FLG_OF1_NONREG 0x40000000 /* non-regular file specified as */ 377 /* the output file */ 378 #define FLG_OF1_ALNODIR 0x80000000 /* establish NODIRECT for all */ 379 /* exported interfaces. */ 380 381 /* 382 * Test to see if the output file would allow the presence of 383 * a .dynsym section. 384 */ 385 #define OFL_ALLOW_DYNSYM(_ofl) (((_ofl)->ofl_flags & \ 386 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == FLG_OF_DYNAMIC) 387 388 /* 389 * Test to see if the output file would allow the presence of 390 * a .SUNW_ldynsym section. The requirements are that a .dynsym 391 * is allowed, and -znoldynsym has not been specified. Note that 392 * even if the answer is True (1), we will only generate one if there 393 * are local symbols that require it. 394 */ 395 #define OFL_ALLOW_LDYNSYM(_ofl) (((_ofl)->ofl_flags & \ 396 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ | FLG_OF_NOLDYNSYM)) == FLG_OF_DYNAMIC) 397 398 /* 399 * Test to see if relocation processing should be done. This is normally 400 * true, but can be disabled via the '-z noreloc' option. Note that 401 * relocatable objects are still relocated even if '-z noreloc' is present. 402 */ 403 #define OFL_DO_RELOC(_ofl) (((_ofl)->ofl_flags & FLG_OF_RELOBJ) || \ 404 !((_ofl)->ofl_dtflags_1 & DF_1_NORELOC)) 405 406 /* 407 * Relocation (active & output) processing structure - transparent to common 408 * code. 409 * 410 * Note that rel_raddend is primarily only of interest to RELA relocations, 411 * and is set to 0 for REL. However, there is an exception: If FLG_REL_NADDEND 412 * is set, then rel_raddend contains a replacement value for the implicit 413 * addend found in the relocation target. 414 */ 415 struct rel_desc { 416 Os_desc *rel_osdesc; /* output section reloc is against */ 417 Is_desc *rel_isdesc; /* input section reloc is against */ 418 const char *rel_sname; /* symbol name (may be "unknown") */ 419 Sym_desc *rel_sym; /* sym relocation is against */ 420 Sym_desc *rel_usym; /* strong sym if this is a weak pair */ 421 Mv_desc *rel_move; /* move table information */ 422 Word rel_flags; /* misc. flags for relocations */ 423 Word rel_rtype; /* relocation type */ 424 Xword rel_roffset; /* relocation offset */ 425 Sxword rel_raddend; /* addend from input relocation */ 426 Word rel_typedata; /* ELF_R_TYPE_DATA(info) */ 427 }; 428 429 /* 430 * common flags used on the Rel_desc structure (defined in machrel.h). 431 */ 432 #define FLG_REL_GOT 0x00000001 /* relocation against GOT */ 433 #define FLG_REL_PLT 0x00000002 /* relocation against PLT */ 434 #define FLG_REL_BSS 0x00000004 /* relocation against BSS */ 435 #define FLG_REL_LOAD 0x00000008 /* section loadable */ 436 #define FLG_REL_SCNNDX 0x00000010 /* use section index for symbol ndx */ 437 #define FLG_REL_CLVAL 0x00000020 /* clear VALUE for active relocation */ 438 #define FLG_REL_ADVAL 0x00000040 /* add VALUE for output relocation, */ 439 /* only relevant to SPARC and */ 440 /* R_SPARC_RELATIVE */ 441 #define FLG_REL_GOTCL 0x00000080 /* clear the GOT entry. This is */ 442 /* relevant to RELA relocations, */ 443 /* not REL (i386) relocations */ 444 #define FLG_REL_MOVETAB 0x00000100 /* Relocation against .SUNW_move */ 445 /* adjustments required before */ 446 /* actual relocation */ 447 #define FLG_REL_NOINFO 0x00000200 /* Relocation comes from a section */ 448 /* with a null sh_info field */ 449 #define FLG_REL_REG 0x00000400 /* Relocation target is reg sym */ 450 #define FLG_REL_FPTR 0x00000800 /* relocation against func. desc. */ 451 #define FLG_REL_RFPTR1 0x00001000 /* Relative relocation against */ 452 /* 1st part of FD */ 453 #define FLG_REL_RFPTR2 0x00002000 /* Relative relocation against */ 454 /* 2nd part of FD */ 455 #define FLG_REL_DISP 0x00004000 /* *disp* relocation */ 456 #define FLG_REL_STLS 0x00008000 /* IE TLS reference to */ 457 /* static TLS GOT index */ 458 #define FLG_REL_DTLS 0x00010000 /* GD TLS reference relative to */ 459 /* dynamic TLS GOT index */ 460 #define FLG_REL_MTLS 0x00020000 /* LD TLS reference against GOT */ 461 #define FLG_REL_STTLS 0x00040000 /* LE TLS reference directly */ 462 /* to static tls index */ 463 #define FLG_REL_TLSFIX 0x00080000 /* relocation points to TLS instr. */ 464 /* which needs updating */ 465 #define FLG_REL_RELA 0x00100000 /* descripter captures a Rela */ 466 #define FLG_REL_GOTFIX 0x00200000 /* relocation points to GOTOP instr. */ 467 /* which needs updating */ 468 #define FLG_REL_NADDEND 0x00400000 /* Replace implicit addend in dest */ 469 /* with value in rel_raddend */ 470 /* Relevant to REL (i386) */ 471 /* relocations, not to RELA. */ 472 473 /* 474 * Structure to hold a cache of Relocations. 475 */ 476 struct rel_cache { 477 Rel_desc *rc_end; 478 Rel_desc *rc_free; 479 }; 480 481 /* 482 * Symbol value descriptor. For relocatable objects, each symbols value is 483 * its offset within its associated section. Therefore, to uniquely define 484 * each symbol within a reloctable object, record and sort the sh_offset and 485 * symbol value. This information is used to seach for displacement 486 * relocations as part of copy relocation validation. 487 */ 488 typedef struct { 489 Addr ssv_value; 490 Sym_desc *ssv_sdp; 491 } Ssv_desc; 492 493 /* 494 * Input file processing structures. 495 */ 496 struct ifl_desc { /* input file descriptor */ 497 const char *ifl_name; /* full file name */ 498 const char *ifl_soname; /* shared object name */ 499 dev_t ifl_stdev; /* device id and inode number for .so */ 500 ino_t ifl_stino; /* multiple inclusion checks */ 501 Ehdr *ifl_ehdr; /* elf header describing this file */ 502 Elf *ifl_elf; /* elf descriptor for this file */ 503 Sym_desc **ifl_oldndx; /* original symbol table indices */ 504 Sym_desc *ifl_locs; /* symbol desc version of locals */ 505 Ssv_desc *ifl_sortsyms; /* sorted list of symbols by value */ 506 Word ifl_locscnt; /* no. of local symbols to process */ 507 Word ifl_symscnt; /* total no. of symbols to process */ 508 Word ifl_sortcnt; /* no. of sorted symbols to process */ 509 Word ifl_shnum; /* number of sections in file */ 510 Word ifl_shstrndx; /* index to .shstrtab */ 511 Word ifl_vercnt; /* number of versions in file */ 512 Is_desc **ifl_isdesc; /* isdesc[scn ndx] = Is_desc ptr */ 513 Sdf_desc *ifl_sdfdesc; /* control definition */ 514 Versym *ifl_versym; /* version symbol table array */ 515 Ver_index *ifl_verndx; /* verndx[ver ndx] = Ver_index */ 516 List ifl_verdesc; /* version descriptor list */ 517 List ifl_relsect; /* relocation section list */ 518 Alist *ifl_groups; /* SHT_GROUP section list */ 519 Half ifl_neededndx; /* index to NEEDED in .dyn section */ 520 Word ifl_flags; /* Explicit/implicit reference */ 521 }; 522 523 #define FLG_IF_CMDLINE 0x00000001 /* full filename specified from the */ 524 /* command line (no -l) */ 525 #define FLG_IF_NEEDED 0x00000002 /* shared object should be recorded */ 526 #define FLG_IF_DIRECT 0x00000004 /* establish direct bindings to this */ 527 /* object */ 528 #define FLG_IF_EXTRACT 0x00000008 /* file extracted from an archive */ 529 #define FLG_IF_VERNEED 0x00000010 /* version dependency information is */ 530 /* required */ 531 #define FLG_IF_DEPREQD 0x00000020 /* dependency is required to satisfy */ 532 /* symbol references */ 533 #define FLG_IF_NEEDSTR 0x00000040 /* dependency specified by -Nn */ 534 /* flag */ 535 #define FLG_IF_IGNORE 0x00000080 /* ignore unused dependencies */ 536 #define FLG_IF_NODIRECT 0x00000100 /* object contains symbols that */ 537 /* cannot be directly bound to. */ 538 #define FLG_IF_LAZYLD 0x00000200 /* bindings to this object should be */ 539 /* lazy loaded */ 540 #define FLG_IF_GRPPRM 0x00000400 /* this dependency should have the */ 541 /* DF_P1_GROUPPERM flag set */ 542 #define FLG_IF_DISPPEND 0x00000800 /* displacement relocation done */ 543 /* in the ld time. */ 544 #define FLG_IF_DISPDONE 0x00001000 /* displacement relocation done */ 545 /* at the run time */ 546 #define FLG_IF_MAPFILE 0x00002000 /* file is a mapfile */ 547 #define FLG_IF_HSTRTAB 0x00004000 /* file has a string section */ 548 #define FLG_IF_FILEREF 0x00008000 /* file contains a section which */ 549 /* is included in the output */ 550 /* allocatable image */ 551 #define FLG_IF_GNUVER 0x00010000 /* file used GNU-style versioning */ 552 553 struct is_desc { /* input section descriptor */ 554 const char *is_name; /* the section name */ 555 const char *is_basename; /* original section name (without */ 556 /* .<sect>%<func> munging */ 557 Shdr *is_shdr; /* the elf section header */ 558 Ifl_desc *is_file; /* infile desc for this section */ 559 Os_desc *is_osdesc; /* new output section for this */ 560 /* input section */ 561 Elf_Data *is_indata; /* input sections raw data */ 562 Is_desc *is_symshndx; /* related SHT_SYM_SHNDX section */ 563 Word is_scnndx; /* original section index in file */ 564 Word is_txtndx; /* Index for section. Used to decide */ 565 /* where to insert section when */ 566 /* reordering sections */ 567 Word is_ident; /* preserved IDENT used for ordered */ 568 /* sections. */ 569 uint_t is_namehash; /* hash on section name */ 570 Half is_key; /* Used for SHF_ORDERED */ 571 Half is_flags; /* Various flags */ 572 }; 573 574 #define FLG_IS_ORDERED 0x0001 /* This is a SHF_ORDERED section */ 575 #define FLG_IS_KEY 0x0002 /* This is a section pointed by */ 576 /* sh_info of a SHF_ORDERED section */ 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 */ 584 585 586 /* 587 * Map file and output file processing structures 588 */ 589 struct os_desc { /* Output section descriptor */ 590 const char *os_name; /* the section name */ 591 Elf_Scn *os_scn; /* the elf section descriptor */ 592 Shdr *os_shdr; /* the elf section header */ 593 Os_desc *os_relosdesc; /* the output relocation section */ 594 List os_relisdescs; /* reloc input section descriptors */ 595 /* for this output section */ 596 List os_isdescs; /* list of input sections in output */ 597 APlist *os_mstrisdescs; /* FLG_IS_INSTRMRG input sections */ 598 Sort_desc *os_sort; /* used for sorting sections */ 599 Sg_desc *os_sgdesc; /* segment os_desc is placed on */ 600 Elf_Data *os_outdata; /* output sections raw data */ 601 List os_comdats; /* list of COMDAT sections present */ 602 /* in current output section */ 603 Word os_scnsymndx; /* index in output symtab of section */ 604 /* symbol for this section */ 605 Word os_txtndx; /* Index for section. Used to decide */ 606 /* where to insert section when */ 607 /* reordering sections */ 608 Xword os_szoutrels; /* size of output relocation section */ 609 uint_t os_namehash; /* hash on section name */ 610 uchar_t os_flags; /* various flags */ 611 }; 612 613 #define FLG_OS_ORDER_KEY 0x01 /* include a sort key section */ 614 #define FLG_OS_OUTREL 0x02 /* output rel against this section */ 615 #define FLG_OS_SECTREF 0x04 /* isps are not affected by -zignore */ 616 617 /* 618 * For sorting sections. 619 */ 620 struct sort_desc { 621 Is_desc **st_order; 622 Word st_ordercnt; 623 Is_desc **st_before; 624 Word st_beforecnt; 625 Is_desc **st_after; 626 Word st_aftercnt; 627 }; 628 629 struct sg_desc { /* output segment descriptor */ 630 Phdr sg_phdr; /* segment header for output file */ 631 const char *sg_name; /* segment name */ 632 Xword sg_round; /* data rounding required (mapfile) */ 633 Xword sg_length; /* maximum segment length; if 0 */ 634 /* segment is not specified */ 635 APlist *sg_osdescs; /* list of output section descriptors */ 636 APlist *sg_secorder; /* list specifying section ordering */ 637 /* for the segment */ 638 Half sg_flags; 639 Sym_desc *sg_sizesym; /* size symbol for this segment */ 640 Xword sg_addralign; /* LCM of sh_addralign */ 641 Elf_Scn *sg_fscn; /* the SCN of the first section. */ 642 }; 643 644 645 #define FLG_SG_VADDR 0x0001 /* vaddr segment attribute set */ 646 #define FLG_SG_PADDR 0x0002 /* paddr segment attribute set */ 647 #define FLG_SG_LENGTH 0x0004 /* length segment attribute set */ 648 #define FLG_SG_ALIGN 0x0008 /* align segment attribute set */ 649 #define FLG_SG_ROUND 0x0010 /* round segment attribute set */ 650 #define FLG_SG_FLAGS 0x0020 /* flags segment attribute set */ 651 #define FLG_SG_TYPE 0x0040 /* type segment attribute set */ 652 #define FLG_SG_ORDER 0x0080 /* has ordering been turned on for */ 653 /* this segment. */ 654 /* i.e. ?[O] option in mapfile */ 655 #define FLG_SG_NOHDR 0x0100 /* don't map ELF or phdrs into */ 656 /* this segment */ 657 #define FLG_SG_EMPTY 0x0200 /* an empty segment specification */ 658 /* no input sections will be */ 659 /* associated to this section */ 660 #define FLG_SG_KEY 0x0400 /* include a key section */ 661 #define FLG_SG_DISABLED 0x0800 /* this segment is disabled */ 662 #define FLG_SG_PHREQ 0x1000 /* this segment requires a program */ 663 /* header */ 664 665 struct sec_order { 666 const char *sco_secname; /* section name to be ordered */ 667 Word sco_index; /* ordering index for section */ 668 Half sco_flags; 669 }; 670 671 #define FLG_SGO_USED 0x0001 /* was ordering used? */ 672 673 struct ent_desc { /* input section entrance criteria */ 674 List ec_files; /* files from which to accept */ 675 /* sections */ 676 const char *ec_name; /* name to match (NULL if none) */ 677 Word ec_type; /* section type */ 678 Word ec_attrmask; /* section attribute mask (AWX) */ 679 Word ec_attrbits; /* sections attribute bits */ 680 Sg_desc *ec_segment; /* output segment to enter if matched */ 681 Word ec_ndx; /* index to determine where section */ 682 /* meeting this criteria should */ 683 /* inserted. Used for reordering */ 684 /* of sections. */ 685 Half ec_flags; 686 }; 687 688 #define FLG_EC_USED 0x0001 /* entrance criteria met? */ 689 690 /* 691 * Move supplementary structures 692 * Sorted by symbol local/global and then by name. 693 */ 694 typedef struct psym_info { 695 Sym_desc *psym_symd; /* partially initialized symbol */ 696 Word psym_num; /* number of move entires */ 697 Half psym_flag; /* various flag */ 698 List psym_mvs; /* the list of move entries */ 699 } Psym_info; 700 701 #define FLG_PSYM_OVERLAP 0x01 /* Overlapping */ 702 703 /* 704 * One structure is allocated for a move entry. 705 */ 706 typedef struct mv_itm { 707 Xword mv_start; /* start position */ 708 Xword mv_length; /* The length of initialization */ 709 Half mv_flag; /* various flags */ 710 Is_desc *mv_isp; /* input desc. this entry is from */ 711 Move *mv_ientry; /* Input Move_entry */ 712 Word mv_oidx; /* Output Move_entry index */ 713 } Mv_itm; 714 715 #define FLG_MV_OUTSECT 0x01 /* Will be in move section */ 716 717 /* 718 * Define a move descripter used within relocation structures. 719 */ 720 struct mv_desc { 721 Move *mvd_move; 722 Sym_desc *mvd_sym; 723 }; 724 725 struct sym_desc { 726 List sd_GOTndxs; /* list of associated GOT entries */ 727 Sym *sd_sym; /* pointer to symbol table entry */ 728 Sym *sd_osym; /* copy of the original symbol entry */ 729 /* used only for local partial */ 730 Psym_info *sd_psyminfo; /* for partial symbols, maintain a */ 731 /* pointer to parsym_info */ 732 const char *sd_name; /* symbols name */ 733 Ifl_desc *sd_file; /* file where symbol is taken */ 734 Is_desc *sd_isc; /* input section of symbol definition */ 735 Sym_aux *sd_aux; /* auxiliary global symbol info. */ 736 Word sd_symndx; /* index in output symbol table */ 737 Word sd_shndx; /* sect. index sym is associated w/ */ 738 Word sd_flags; /* state flags */ 739 Half sd_flags1; /* more symbol flags */ 740 Half sd_ref; /* reference definition of symbol */ 741 }; 742 743 /* 744 * The auxiliary symbol descriptor contains the additional information (beyond 745 * the symbol descriptor) required to process global symbols. These symbols are 746 * accessed via an internal symbol hash table where locality of reference is 747 * important for performance. 748 */ 749 struct sym_aux { 750 List sa_dfiles; /* files where symbol is defined */ 751 Sym sa_sym; /* copy of symtab entry */ 752 const char *sa_vfile; /* first unavailable definition */ 753 Ifl_desc *sa_bindto; /* symbol to bind to - for translator */ 754 const char *sa_rfile; /* file with first symbol referenced */ 755 Word sa_hash; /* the pure hash value of symbol */ 756 Word sa_PLTndx; /* index into PLT for symbol */ 757 Word sa_PLTGOTndx; /* GOT entry indx for PLT indirection */ 758 Word sa_linkndx; /* index of associated symbol from */ 759 /* ET_DYN file */ 760 Half sa_symspec; /* special symbol ids */ 761 Half sa_overndx; /* output file versioning index */ 762 Half sa_dverndx; /* dependency versioning index */ 763 }; 764 765 766 /* 767 * Nodes used to track symbols in the global AVL symbol dictionary. 768 */ 769 struct sym_avlnode { 770 avl_node_t sav_node; /* AVL node */ 771 Word sav_hash; /* symbol hash value */ 772 const char *sav_name; /* symbol name */ 773 Sym_desc *sav_symdesc; /* SymDesc entry */ 774 }; 775 776 /* 777 * These are the ids for processing of `Special symbols'. They are used 778 * to set the sym->sd_aux->sa_symspec field. 779 */ 780 #define SDAUX_ID_ETEXT 1 /* etext && _etext symbol */ 781 #define SDAUX_ID_EDATA 2 /* edata && _edata symbol */ 782 #define SDAUX_ID_END 3 /* end, _end, && _END_ symbol */ 783 #define SDAUX_ID_DYN 4 /* DYNAMIC && _DYNAMIC symbol */ 784 #define SDAUX_ID_PLT 5 /* _PROCEDURE_LINKAGE_TABLE_ symbol */ 785 #define SDAUX_ID_GOT 6 /* _GLOBAL_OFFSET_TABLE_ symbol */ 786 #define SDAUX_ID_START 7 /* START_ && _START_ symbol */ 787 788 /* 789 * Flags for sym_desc.sd_flags 790 */ 791 #define FLG_SY_MVTOCOMM 0x00000001 /* assign symbol to common (.bss) */ 792 /* this is a result of a */ 793 /* copy reloc against sym */ 794 #define FLG_SY_GLOBREF 0x00000002 /* a global reference has been seen */ 795 #define FLG_SY_WEAKDEF 0x00000004 /* a weak definition has been used */ 796 #define FLG_SY_CLEAN 0x00000008 /* `Sym' entry points to original */ 797 /* input file (read-only). */ 798 #define FLG_SY_UPREQD 0x00000010 /* symbol value update is required, */ 799 /* either it's used as an entry */ 800 /* point or for relocation, but */ 801 /* it must be updated even if */ 802 /* the -s flag is in effect */ 803 #define FLG_SY_NOTAVAIL 0x00000020 /* symbol is not available to the */ 804 /* application either because it */ 805 /* originates from an implicitly */ 806 /* referenced shared object, or */ 807 /* because it is not part of a */ 808 /* specified version. */ 809 #define FLG_SY_REDUCED 0x00000040 /* a global is reduced to local */ 810 #define FLG_SY_VERSPROM 0x00000080 /* version definition has been */ 811 /* promoted to output file */ 812 #define FLG_SY_PROT 0x00000100 /* stv_protected visibility seen */ 813 814 #define FLG_SY_MAPREF 0x00000200 /* symbol reference generated by user */ 815 /* from mapfile */ 816 #define FLG_SY_REFRSD 0x00000400 /* symbols sd_ref has been raised */ 817 /* due to a copy-relocs */ 818 /* weak-strong pairing */ 819 #define FLG_SY_INTPOSE 0x00000800 /* symbol defines an interposer */ 820 #define FLG_SY_INVALID 0x00001000 /* unwanted/erroneous symbol */ 821 #define FLG_SY_SMGOT 0x00002000 /* small got index assigned to symbol */ 822 /* sparc only */ 823 #define FLG_SY_PARENT 0x00004000 /* symbol to be found in parent */ 824 /* only used with direct bindings */ 825 #define FLG_SY_LAZYLD 0x00008000 /* symbol to cause lazyloading of */ 826 /* parent object */ 827 #define FLG_SY_ISDISC 0x00010000 /* symbol is a member of a DISCARDED */ 828 /* section (COMDAT) */ 829 #define FLG_SY_PAREXPN 0x00020000 /* partially init. symbol to be */ 830 /* expanded */ 831 #define FLG_SY_PLTPAD 0x00040000 /* pltpadding has been allocated for */ 832 /* this symbol */ 833 #define FLG_SY_REGSYM 0x00080000 /* REGISTER symbol (sparc only) */ 834 #define FLG_SY_SOFOUND 0x00100000 /* compared against an SO definition */ 835 #define FLG_SY_EXTERN 0x00200000 /* symbol is external, allows -zdefs */ 836 /* error suppression */ 837 #define FLG_SY_MAPUSED 0x00400000 /* mapfile symbol used (occurred */ 838 /* within a relocatable object) */ 839 #define FLG_SY_COMMEXP 0x00800000 /* COMMON symbol which has been */ 840 /* allocated */ 841 #define FLG_SY_CMDREF 0x01000000 /* symbol was referenced from the */ 842 /* command line. (ld -u <>, */ 843 /* ld -zrtldinfo=<>, ...) */ 844 #define FLG_SY_SPECSEC 0x02000000 /* section index is reserved value */ 845 /* ABS, COMMON, ... */ 846 #define FLG_SY_TENTSYM 0x04000000 /* tentative symbol */ 847 #define FLG_SY_VISIBLE 0x08000000 /* symbols visibility determined */ 848 #define FLG_SY_STDFLTR 0x10000000 /* symbol is a standard filter */ 849 #define FLG_SY_AUXFLTR 0x20000000 /* symbol is an auxiliary filter */ 850 #define FLG_SY_DYNSORT 0x40000000 /* req. in dyn[sym|tls]sort section */ 851 #define FLG_SY_NODYNSORT 0x80000000 /* excluded from dyn[sym_tls]sort sec */ 852 853 /* 854 * Sym_desc.sd_flags1 855 */ 856 #define FLG_SY1_DEFAULT 0x00000001 /* global symbol, default */ 857 #define FLG_SY1_SINGLE 0x00000002 /* global symbol, singleton defined */ 858 #define FLG_SY1_PROTECT 0x00000004 /* global symbol, protected defined */ 859 #define FLG_SY1_EXPORT 0x00000008 /* global symbol, exported defined */ 860 861 #define MSK_SY1_GLOBAL \ 862 (FLG_SY1_DEFAULT | FLG_SY1_SINGLE | FLG_SY1_PROTECT | FLG_SY1_EXPORT) 863 /* this mask indicates that the */ 864 /* symbol has been explicitly */ 865 /* defined within a mapfile */ 866 /* definition, and is a candidate */ 867 /* for versioning */ 868 869 #define FLG_SY1_HIDDEN 0x00000010 /* global symbol, reduce to local */ 870 #define FLG_SY1_ELIM 0x00000020 /* global symbol, eliminate */ 871 #define FLG_SY1_IGNORE 0x00000040 /* global symbol, ignored */ 872 873 #define MSK_SY1_LOCAL (FLG_SY1_HIDDEN | FLG_SY1_ELIM | FLG_SY1_IGNORE) 874 /* this mask allows all local state */ 875 /* flags to be removed when the */ 876 /* symbol is copy relocated */ 877 878 #define FLG_SY1_EXPDEF 0x00000100 /* symbol visibility defined */ 879 /* explicitly */ 880 881 #define MSK_SY1_NOAUTO (FLG_SY1_SINGLE | FLG_SY1_EXPORT | FLG_SY1_EXPDEF) 882 /* this mask indicates that the */ 883 /* symbol is not a candidate for */ 884 /* auto-reduction/elimination */ 885 886 #define FLG_SY1_MAPFILE 0x00000200 /* symbol attribute defined in a */ 887 /* mapfile */ 888 #define FLG_SY1_DIR 0x00000400 /* global symbol, direct bindings */ 889 #define FLG_SY1_NDIR 0x00000800 /* global symbol, nondirect bindings */ 890 891 /* 892 * Create a mask for (sym.st_other & visibility) since the gABI does not yet 893 * define a ELF*_ST_OTHER macro. 894 */ 895 #define MSK_SYM_VISIBILITY 0x7 896 897 /* 898 * Structure to manage the shared object definition lists. There are two lists 899 * that use this structure: 900 * 901 * o ofl_soneed; maintain the list of implicitly required dependencies 902 * (ie. shared objects needed by other shared objects). These definitions 903 * may include RPATH's required to locate the dependencies, and any 904 * version requirements. 905 * 906 * o ofl_socntl; maintains the shared object control definitions. These are 907 * provided by the user (via a mapfile) and are used to indicate any 908 * SONAME translations and verion control requirements. 909 */ 910 struct sdf_desc { 911 const char *sdf_name; /* the shared objects file name */ 912 const char *sdf_soname; /* the shared objects SONAME */ 913 char *sdf_rpath; /* library search path DT_RPATH */ 914 const char *sdf_rfile; /* referencing file for diagnostics */ 915 Ifl_desc *sdf_file; /* the final input file descriptor */ 916 List sdf_vers; /* list of versions that are required */ 917 /* from this object */ 918 List sdf_verneed; /* list of VERNEEDS to create for */ 919 /* this object (via SPECVERS or */ 920 /* ADDVERS) */ 921 Word sdf_flags; 922 }; 923 924 #define FLG_SDF_SONAME 0x02 /* An alternative SONAME is supplied */ 925 #define FLG_SDF_SELECT 0x04 /* version control selection required */ 926 #define FLG_SDF_VERIFY 0x08 /* version definition verification */ 927 /* required */ 928 #define FLG_SDF_SPECVER 0x10 /* specify VERNEEDS */ 929 #define FLG_SDF_ADDVER 0x20 /* add VERNEED references */ 930 931 /* 932 * Structure to manage shared object version usage requirements. 933 */ 934 struct sdv_desc { 935 const char *sdv_name; /* version name */ 936 const char *sdv_ref; /* versions reference */ 937 Word sdv_flags; /* flags */ 938 }; 939 940 #define FLG_SDV_MATCHED 0x01 /* VERDEF found and matched */ 941 942 /* 943 * Structures to manage versioning information. Two versioning structures are 944 * defined: 945 * 946 * o a version descriptor maintains a linked list of versions and their 947 * associated dependencies. This is used to build the version definitions 948 * for an image being created (see map_symbol), and to determine the 949 * version dependency graph for any input files that are versioned. 950 * 951 * o a version index array contains each version of an input file that is 952 * being processed. It informs us which versions are available for 953 * binding, and is used to generate any version dependency information. 954 */ 955 struct ver_desc { 956 const char *vd_name; /* version name */ 957 Word vd_hash; /* hash value of name */ 958 Ifl_desc *vd_file; /* file that defined version */ 959 Half vd_ndx; /* coordinates with symbol index */ 960 Half vd_flags; /* version information */ 961 List vd_deps; /* version dependencies */ 962 Ver_desc *vd_ref; /* dependency's first reference */ 963 }; 964 965 struct ver_index { 966 const char *vi_name; /* dependency version name */ 967 Half vi_flags; /* communicates availability */ 968 Ver_desc *vi_desc; /* cross reference to descriptor */ 969 }; 970 971 /* 972 * Define any internal version descriptor flags ([vd|vi]_flags). Note that the 973 * first byte is reserved for user visible flags (refer VER_FLG's in link.h). 974 */ 975 #define MSK_VER_USER 0x0f /* mask for user visible flags */ 976 977 #define FLG_VER_AVAIL 0x10 /* version is available for binding */ 978 #define FLG_VER_REFER 0x20 /* version has been referenced */ 979 #define FLG_VER_SELECT 0x40 /* version has been selected by user */ 980 #define FLG_VER_CYCLIC 0x80 /* a member of cyclic dependency */ 981 982 983 /* 984 * isalist(1) descriptor - used to break an isalist string into its component 985 * options. 986 */ 987 struct isa_opt { 988 char *isa_name; /* individual isa option name */ 989 size_t isa_namesz; /* and associated size */ 990 }; 991 992 struct isa_desc { 993 char *isa_list; /* sysinfo(SI_ISALIST) list */ 994 size_t isa_listsz; /* and associated size */ 995 Isa_opt *isa_opt; /* table of individual isa options */ 996 size_t isa_optno; /* and associated number */ 997 }; 998 999 /* 1000 * uname(2) descriptor - used to break a utsname structure into its component 1001 * options (at least those that we're interested in). 1002 */ 1003 struct uts_desc { 1004 char *uts_osname; /* operating system name */ 1005 size_t uts_osnamesz; /* and associated size */ 1006 char *uts_osrel; /* operating system release */ 1007 size_t uts_osrelsz; /* and associated size */ 1008 }; 1009 1010 1011 /* 1012 * SHT_GROUP descriptor - used to track group sections at the global 1013 * level to resolve conflicts/determine which to keep. 1014 */ 1015 struct group_desc { 1016 const char *gd_gsectname; /* group section name */ 1017 const char *gd_symname; /* symbol name */ 1018 Word *gd_data; /* data for group section */ 1019 size_t gd_scnndx; /* group section index */ 1020 size_t gd_cnt; /* number of entries in group data */ 1021 Word gd_flags; 1022 }; 1023 1024 #define GRP_FLG_DISCARD 0x0001 /* group is to be discarded */ 1025 1026 /* 1027 * Indexes into the ld_support_funcs[] table. 1028 */ 1029 typedef enum { 1030 LDS_VERSION = 0, 1031 LDS_INPUT_DONE, 1032 LDS_START, 1033 LDS_ATEXIT, 1034 LDS_OPEN, 1035 LDS_FILE, 1036 LDS_INSEC, 1037 LDS_SEC, 1038 LDS_NUM 1039 } Support_ndx; 1040 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 ld32_main(int, char **, Half); 1120 extern int ld64_main(int, char **, Half); 1121 1122 extern uintptr_t ld_create_outfile(Ofl_desc *); 1123 extern uintptr_t ld_ent_setup(Ofl_desc *, Xword); 1124 extern uintptr_t ld_init_strings(Ofl_desc *); 1125 extern int ld_init_target(Lm_list *, Half mach); 1126 extern uintptr_t ld_make_sections(Ofl_desc *); 1127 extern void ld_ofl_cleanup(Ofl_desc *); 1128 extern Ifl_desc *ld_process_open(const char *, const char *, int *, 1129 Ofl_desc *, Word, Rej_desc *); 1130 extern uintptr_t ld_reloc_init(Ofl_desc *); 1131 extern uintptr_t ld_reloc_process(Ofl_desc *); 1132 extern uintptr_t ld_sym_validate(Ofl_desc *); 1133 extern uintptr_t ld_update_outfile(Ofl_desc *); 1134 1135 #ifdef __cplusplus 1136 } 1137 #endif 1138 1139 #endif /* _LIBLD_H */ 1140