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 2007 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 <machdep.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) If two compatible sections both have these flags set, it is 78 * OK to combine identical strings into single instances. 79 * In this case, the two sections would be modified to both 80 * reference a single string copy. 81 * 82 * This is a different meaning than the simple concatenating of sections 83 * that the linker always does. It is a hint that an additional optimization 84 * is possible, but not required. This means that sections that do not 85 * share the same SHF_MERGE|SHF_STRINGS values can be merged (concatenated), 86 * but cannot have their duplicate strings combined. Hence, the values 87 * of SHF_MERGE|SHF_STRINGS should be ignored when deciding whether two 88 * sections can be merged (concatenated). 89 * 90 * We do not currently implement the SHF_MERGE|SHF_STRINGS optimization, 91 * but it is possible to add it. If we did, the procedure would be to 92 * first combine the compatible sections that have these flag bits set, 93 * and then to concatenate any others to the result. 94 */ 95 #define ALL_SHF_IGNORE (ALL_SHF_ORDER | SHF_GROUP | SHF_MERGE | SHF_STRINGS) 96 97 /* 98 * Define symbol reference types for use in symbol resolution. 99 */ 100 typedef enum { 101 REF_DYN_SEEN, /* a .so symbol has been seen */ 102 REF_DYN_NEED, /* a .so symbol satisfies a .o symbol */ 103 REF_REL_NEED, /* a .o symbol */ 104 REF_NUM /* the number of symbol references */ 105 } Symref; 106 107 108 /* 109 * GOT reference models 110 */ 111 typedef enum { 112 GOT_REF_GENERIC, /* generic symbol reference */ 113 GOT_REF_TLSIE, /* TLS initial exec (gnu) reference */ 114 GOT_REF_TLSLD, /* TLS local dynamic reference */ 115 GOT_REF_TLSGD /* TLS general dynamic reference */ 116 } Gotref; 117 118 typedef struct { 119 Xword gn_addend; /* addend associated with GOT entry */ 120 Sword gn_gotndx; /* GOT table index */ 121 Gotref gn_gotref; 122 } Gotndx; 123 124 /* 125 * Got debugging structure. The got index is defined as a signed value as we 126 * do so much mucking around with negative and positive gots on SPARC, and sign 127 * extension is necessary when building 64-bit objects. On intel we explicitly 128 * cast this variable to an unsigned value. 129 */ 130 typedef struct { 131 Sym_desc * gt_sym; 132 Gotndx gt_gndx; 133 } Gottable; 134 135 /* 136 * Output file processing structure 137 */ 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(__x86) && defined(_ELF64) 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 Lword ofl_flags; /* various state bits, args etc. */ 193 Lword 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 #define FLG_OF_AUTOLCL 0x02000000 /* automatically reduce unspecified */ 313 /* global symbols to locals */ 314 #define FLG_OF_PROCRED 0x04000000 /* process any symbol reductions by */ 315 /* effecting the symbol table */ 316 /* output and relocations */ 317 #define FLG_OF_SYMINFO 0x08000000 /* create a syminfo section */ 318 #define FLG_OF_AUX 0x10000000 /* ofl_filter is an auxiliary filter */ 319 #define FLG_OF_FATAL 0x20000000 /* fatal error during input */ 320 #define FLG_OF_WARN 0x40000000 /* warning during input processing. */ 321 #define FLG_OF_VERBOSE 0x80000000 /* -z verbose flag set */ 322 323 #define FLG_OF_MAPSYMB 0x000100000000 /* symbolic scope definition seen */ 324 #define FLG_OF_MAPGLOB 0x000200000000 /* global scope definition seen */ 325 326 /* 327 * In the flags1 arena, establish any options that are applicable to archive 328 * extraction first, and associate a mask. These values are recorded with any 329 * archive descriptor so that they may be reset should the archive require a 330 * rescan to try and resolve undefined symbols. 331 */ 332 #define FLG_OF1_ALLEXRT 0x00000001 /* extract all members from an */ 333 /* archive file */ 334 #define FLG_OF1_WEAKEXT 0x00000002 /* allow archive extraction to */ 335 /* resolve weak references */ 336 #define MSK_OF1_ARCHIVE 0x00000003 /* archive flags mask */ 337 338 #define FLG_OF1_NOINTRP 0x00000008 /* -z nointerp flag set */ 339 #define FLG_OF1_ZDIRECT 0x00000010 /* -z direct flag set */ 340 #define FLG_OF1_NDIRECT 0x00000020 /* no-direct bindings specified */ 341 #define FLG_OF1_OVHWCAP 0x00000040 /* override any input hardware or */ 342 #define FLG_OF1_OVSFCAP 0x00000080 /* software capabilities */ 343 #define FLG_OF1_RELDYN 0x00000100 /* process .dynamic in rel obj */ 344 #define FLG_OF1_REDLSYM 0x00000200 /* reduce local symbols */ 345 #define FLG_OF1_AUTOELM 0x00000400 /* automatically eliminate */ 346 /* unspecified global symbols */ 347 #define FLG_OF1_IGNORE 0x00000800 /* ignore unused dependencies */ 348 #define FLG_OF1_RELCNT 0x00001000 /* enable DT_RELACNT tracking */ 349 #define FLG_OF1_TEXTOFF 0x00002000 /* text relocations are ok */ 350 #define FLG_OF1_ABSEXEC 0x00004000 /* -zabsexec set */ 351 #define FLG_OF1_LAZYLD 0x00008000 /* lazy loading of objects enabled */ 352 #define FLG_OF1_GRPPRM 0x00010000 /* dependencies are to have */ 353 /* GROUPPERM enabled */ 354 #define FLG_OF1_OVRFLW 0x00020000 /* size exceeds 32-bit limitation */ 355 /* of 32-bit libld */ 356 #define FLG_OF1_NOPARTI 0x00040000 /* -znopartial set */ 357 #define FLG_OF1_BSSOREL 0x00080000 /* output relocation against bss */ 358 /* section */ 359 #define FLG_OF1_TLSOREL 0x00100000 /* output relocation against .tlsbss */ 360 /* section */ 361 #define FLG_OF1_MEMORY 0x00200000 /* produce a memory model */ 362 #define FLG_OF1_RLXREL 0x00400000 /* -z relaxreloc flag set */ 363 364 #define FLG_OF1_VADDR 0x01000000 /* vaddr was explicitly set */ 365 #define FLG_OF1_EXTRACT 0x02000000 /* archive member has been extracted */ 366 #define FLG_OF1_RESCAN 0x04000000 /* any archives should be rescanned */ 367 #define FLG_OF1_IGNPRC 0x08000000 /* ignore processing required */ 368 #define FLG_OF1_NCSTTAB 0x10000000 /* -znocompstrtab set */ 369 #define FLG_OF1_DONE 0x20000000 /* link-editor processing complete */ 370 #define FLG_OF1_NONREG 0x40000000 /* non-regular file specified as */ 371 /* the output file */ 372 #define FLG_OF1_ALNODIR 0x80000000 /* establish NODIRECT for all */ 373 /* exported interfaces. */ 374 375 /* 376 * Test to see if the output file would allow the presence of 377 * a .dynsym section. 378 */ 379 #define OFL_ALLOW_DYNSYM(ofl) ((ofl->ofl_flags & \ 380 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == FLG_OF_DYNAMIC) 381 382 /* 383 * Test to see if the output file would allow the presence of 384 * a .SUNW_ldynsym section. The requirements are that a .dynsym 385 * is allowed, and -znoldynsym has not been specified. Note that 386 * even if the answer is True (1), we will only generate one if there 387 * are local symbols that require it. 388 */ 389 #define OFL_ALLOW_LDYNSYM(ofl) ((ofl->ofl_flags & \ 390 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ | FLG_OF_NOLDYNSYM)) == FLG_OF_DYNAMIC) 391 392 /* 393 * Relocation (active & output) processing structure - transparent to common 394 * code. 395 */ 396 struct rel_desc { 397 Os_desc *rel_osdesc; /* output section reloc is against */ 398 Is_desc *rel_isdesc; /* input section reloc is against */ 399 const char *rel_sname; /* symbol name (may be "unknown") */ 400 Sym_desc *rel_sym; /* sym relocation is against */ 401 Sym_desc *rel_usym; /* strong sym if this is a weak pair */ 402 Mv_desc *rel_move; /* move table information */ 403 Word rel_flags; /* misc. flags for relocations */ 404 Word rel_rtype; /* relocation type */ 405 Xword rel_roffset; /* relocation offset */ 406 Sxword rel_raddend; /* addend from input relocation */ 407 Word rel_typedata; /* ELF_R_TYPE_DATA(info) */ 408 }; 409 410 /* 411 * common flags used on the Rel_desc structure (defined in machrel.h). 412 */ 413 #define FLG_REL_GOT 0x00000001 /* relocation against GOT */ 414 #define FLG_REL_PLT 0x00000002 /* relocation against PLT */ 415 #define FLG_REL_BSS 0x00000004 /* relocation against BSS */ 416 #define FLG_REL_LOAD 0x00000008 /* section loadable */ 417 #define FLG_REL_SCNNDX 0x00000010 /* use section index for symbol ndx */ 418 #define FLG_REL_CLVAL 0x00000020 /* clear VALUE for active relocation */ 419 #define FLG_REL_ADVAL 0x00000040 /* add VALUE for output relocation, */ 420 /* only relevant to SPARC and */ 421 /* R_SPARC_RELATIVE */ 422 #define FLG_REL_GOTCL 0x00000080 /* clear the GOT entry. This is */ 423 /* relevant to RELA relocations, */ 424 /* not REL (i386) relocations */ 425 #define FLG_REL_MOVETAB 0x00000100 /* Relocation against .SUNW_move */ 426 /* adjustments required before */ 427 /* actual relocation */ 428 #define FLG_REL_NOINFO 0x00000200 /* Relocation comes from a section */ 429 /* with a null sh_info field */ 430 #define FLG_REL_REG 0x00000400 /* Relocation target is reg sym */ 431 #define FLG_REL_FPTR 0x00000800 /* relocation against func. desc. */ 432 #define FLG_REL_RFPTR1 0x00001000 /* Relative relocation against */ 433 /* 1st part of FD */ 434 #define FLG_REL_RFPTR2 0x00002000 /* Relative relocation against */ 435 /* 2nd part of FD */ 436 #define FLG_REL_DISP 0x00004000 /* *disp* relocation */ 437 #define FLG_REL_STLS 0x00008000 /* IE TLS reference to */ 438 /* static TLS GOT index */ 439 #define FLG_REL_DTLS 0x00010000 /* GD TLS reference relative to */ 440 /* dynamic TLS GOT index */ 441 #define FLG_REL_MTLS 0x00020000 /* LD TLS reference against GOT */ 442 #define FLG_REL_STTLS 0x00040000 /* LE TLS reference directly */ 443 /* to static tls index */ 444 #define FLG_REL_TLSFIX 0x00080000 /* relocation points to TLS instr. */ 445 /* which needs updating */ 446 #define FLG_REL_RELA 0x00100000 /* descripter captures a Rela */ 447 #define FLG_REL_GOTFIX 0x00200000 /* relocation points to GOTOP instr. */ 448 /* which needs updating */ 449 450 /* 451 * Structure to hold a cache of Relocations. 452 */ 453 struct rel_cache { 454 Rel_desc *rc_end; 455 Rel_desc *rc_free; 456 }; 457 458 /* 459 * Symbol value descriptor. For relocatable objects, each symbols value is 460 * its offset within its associated section. Therefore, to uniquely define 461 * each symbol within a reloctable object, record and sort the sh_offset and 462 * symbol value. This information is used to seach for displacement 463 * relocations as part of copy relocation validation. 464 */ 465 typedef struct { 466 Addr ssv_value; 467 Sym_desc *ssv_sdp; 468 } Ssv_desc; 469 470 /* 471 * Input file processing structures. 472 */ 473 struct ifl_desc { /* input file descriptor */ 474 const char *ifl_name; /* full file name */ 475 const char *ifl_soname; /* shared object name */ 476 dev_t ifl_stdev; /* device id and inode number for .so */ 477 ino_t ifl_stino; /* multiple inclusion checks */ 478 Ehdr *ifl_ehdr; /* elf header describing this file */ 479 Elf *ifl_elf; /* elf descriptor for this file */ 480 Sym_desc **ifl_oldndx; /* original symbol table indices */ 481 Sym_desc *ifl_locs; /* symbol desc version of locals */ 482 Ssv_desc *ifl_sortsyms; /* sorted list of symbols by value */ 483 Word ifl_locscnt; /* no. of local symbols to process */ 484 Word ifl_symscnt; /* total no. of symbols to process */ 485 Word ifl_sortcnt; /* no. of sorted symbols to process */ 486 Word ifl_shnum; /* number of sections in file */ 487 Word ifl_shstrndx; /* index to .shstrtab */ 488 Word ifl_vercnt; /* number of versions in file */ 489 Is_desc **ifl_isdesc; /* isdesc[scn ndx] = Is_desc ptr */ 490 Sdf_desc *ifl_sdfdesc; /* control definition */ 491 Versym *ifl_versym; /* version symbol table array */ 492 Ver_index *ifl_verndx; /* verndx[ver ndx] = Ver_index */ 493 List ifl_verdesc; /* version descriptor list */ 494 List ifl_relsect; /* relocation section list */ 495 Alist *ifl_groups; /* SHT_GROUP section list */ 496 Half ifl_neededndx; /* index to NEEDED in .dyn section */ 497 Word ifl_flags; /* Explicit/implicit reference */ 498 }; 499 500 #define FLG_IF_CMDLINE 0x00000001 /* full filename specified from the */ 501 /* command line (no -l) */ 502 #define FLG_IF_NEEDED 0x00000002 /* shared object should be recorded */ 503 #define FLG_IF_DIRECT 0x00000004 /* establish direct bindings to this */ 504 /* object */ 505 #define FLG_IF_EXTRACT 0x00000008 /* file extracted from an archive */ 506 #define FLG_IF_VERNEED 0x00000010 /* version dependency information is */ 507 /* required */ 508 #define FLG_IF_DEPREQD 0x00000020 /* dependency is required to satisfy */ 509 /* symbol references */ 510 #define FLG_IF_NEEDSTR 0x00000040 /* dependency specified by -Nn */ 511 /* flag */ 512 #define FLG_IF_IGNORE 0x00000080 /* ignore unused dependencies */ 513 #define FLG_IF_NODIRECT 0x00000100 /* object contains symbols that */ 514 /* cannot be directly bound to. */ 515 #define FLG_IF_LAZYLD 0x00000200 /* bindings to this object should be */ 516 /* lazy loaded */ 517 #define FLG_IF_GRPPRM 0x00000400 /* this dependency should have the */ 518 /* DF_P1_GROUPPERM flag set */ 519 #define FLG_IF_DISPPEND 0x00000800 /* displacement relocation done */ 520 /* in the ld time. */ 521 #define FLG_IF_DISPDONE 0x00001000 /* displacement relocation done */ 522 /* at the run time */ 523 #define FLG_IF_MAPFILE 0x00002000 /* file is a mapfile */ 524 #define FLG_IF_HSTRTAB 0x00004000 /* file has a string section */ 525 #define FLG_IF_FILEREF 0x00008000 /* file contains a section which */ 526 /* is included in the output */ 527 /* allocatable image */ 528 #define FLG_IF_GNUVER 0x00010000 /* file used GNU-style versioning */ 529 530 struct is_desc { /* input section descriptor */ 531 const char *is_name; /* the section name */ 532 const char *is_basename; /* original section name (without */ 533 /* .<sect>%<func> munging */ 534 Shdr *is_shdr; /* the elf section header */ 535 Ifl_desc *is_file; /* infile desc for this section */ 536 Os_desc *is_osdesc; /* new output section for this */ 537 /* input section */ 538 Elf_Data *is_indata; /* input sections raw data */ 539 Is_desc *is_symshndx; /* related SHT_SYM_SHNDX section */ 540 Word is_scnndx; /* original section index in file */ 541 Word is_txtndx; /* Index for section. Used to decide */ 542 /* where to insert section when */ 543 /* reordering sections */ 544 Word is_ident; /* preserved IDENT used for ordered */ 545 /* sections. */ 546 uint_t is_namehash; /* hash on section name */ 547 Half is_key; /* Used for SHF_ORDERED */ 548 Half is_flags; /* Various flags */ 549 }; 550 551 #define FLG_IS_ORDERED 0x0001 /* This is a SHF_ORDERED section */ 552 #define FLG_IS_KEY 0x0002 /* This is a section pointed by */ 553 /* sh_info of a SHF_ORDERED section */ 554 #define FLG_IS_DISCARD 0x0004 /* section is to be discarded */ 555 #define FLG_IS_RELUPD 0x0008 /* symbol defined here may have moved */ 556 #define FLG_IS_SECTREF 0x0010 /* section has been referenced */ 557 #define FLG_IS_GDATADEF 0x0020 /* section contains global data sym */ 558 #define FLG_IS_EXTERNAL 0x0040 /* isp from an user file */ 559 560 561 /* 562 * Map file and output file processing structures 563 */ 564 struct os_desc { /* Output section descriptor */ 565 const char *os_name; /* the section name */ 566 Elf_Scn *os_scn; /* the elf section descriptor */ 567 Shdr *os_shdr; /* the elf section header */ 568 Os_desc *os_relosdesc; /* the output relocation section */ 569 List os_relisdescs; /* reloc input section descriptors */ 570 /* for this output section */ 571 List os_isdescs; /* list of input sections in output */ 572 Sort_desc *os_sort; /* used for sorting sections */ 573 Sg_desc *os_sgdesc; /* segment os_desc is placed on */ 574 Elf_Data *os_outdata; /* output sections raw data */ 575 List os_comdats; /* list of COMDAT sections present */ 576 /* in current output section */ 577 Word os_scnsymndx; /* index in output symtab of section */ 578 /* symbol for this section */ 579 Word os_txtndx; /* Index for section. Used to decide */ 580 /* where to insert section when */ 581 /* reordering sections */ 582 Xword os_szoutrels; /* size of output relocation section */ 583 uint_t os_namehash; /* hash on section name */ 584 uchar_t os_flags; /* various flags */ 585 }; 586 587 #define FLG_OS_ORDER_KEY 0x01 /* include a sort key section */ 588 #define FLG_OS_OUTREL 0x02 /* output rel against this section */ 589 #define FLG_OS_SECTREF 0x04 /* isps are not affected by -zignore */ 590 591 /* 592 * For sorting sections. 593 */ 594 struct sort_desc { 595 Is_desc **st_order; 596 Word st_ordercnt; 597 Is_desc **st_before; 598 Word st_beforecnt; 599 Is_desc **st_after; 600 Word st_aftercnt; 601 }; 602 603 struct sg_desc { /* output segment descriptor */ 604 Phdr sg_phdr; /* segment header for output file */ 605 const char *sg_name; /* segment name */ 606 Xword sg_round; /* data rounding required (mapfile) */ 607 Xword sg_length; /* maximum segment length; if 0 */ 608 /* segment is not specified */ 609 Alist *sg_osdescs; /* list of output section descriptors */ 610 Alist *sg_secorder; /* list specifying section ordering */ 611 /* for the segment */ 612 Half sg_flags; 613 Sym_desc *sg_sizesym; /* size symbol for this segment */ 614 Xword sg_addralign; /* LCM of sh_addralign */ 615 Elf_Scn *sg_fscn; /* the SCN of the first section. */ 616 }; 617 618 619 #define FLG_SG_VADDR 0x0001 /* vaddr segment attribute set */ 620 #define FLG_SG_PADDR 0x0002 /* paddr segment attribute set */ 621 #define FLG_SG_LENGTH 0x0004 /* length segment attribute set */ 622 #define FLG_SG_ALIGN 0x0008 /* align segment attribute set */ 623 #define FLG_SG_ROUND 0x0010 /* round segment attribute set */ 624 #define FLG_SG_FLAGS 0x0020 /* flags segment attribute set */ 625 #define FLG_SG_TYPE 0x0040 /* type segment attribute set */ 626 #define FLG_SG_ORDER 0x0080 /* has ordering been turned on for */ 627 /* this segment. */ 628 /* i.e. ?[O] option in mapfile */ 629 #define FLG_SG_NOHDR 0x0100 /* don't map ELF or phdrs into */ 630 /* this segment */ 631 #define FLG_SG_EMPTY 0x0200 /* an empty segment specification */ 632 /* no input sections will be */ 633 /* associated to this section */ 634 #define FLG_SG_KEY 0x0400 /* include a key section */ 635 #define FLG_SG_DISABLED 0x0800 /* this segment is disabled */ 636 #define FLG_SG_PHREQ 0x1000 /* this segment requires a program */ 637 /* header */ 638 639 struct sec_order { 640 const char *sco_secname; /* section name to be ordered */ 641 Word sco_index; /* ordering index for section */ 642 Half sco_flags; 643 }; 644 645 #define FLG_SGO_USED 0x0001 /* was ordering used? */ 646 647 struct ent_desc { /* input section entrance criteria */ 648 List ec_files; /* files from which to accept */ 649 /* sections */ 650 const char *ec_name; /* name to match (NULL if none) */ 651 Word ec_type; /* section type */ 652 Word ec_attrmask; /* section attribute mask (AWX) */ 653 Word ec_attrbits; /* sections attribute bits */ 654 Sg_desc *ec_segment; /* output segment to enter if matched */ 655 Word ec_ndx; /* index to determine where section */ 656 /* meeting this criteria should */ 657 /* inserted. Used for reordering */ 658 /* of sections. */ 659 Half ec_flags; 660 }; 661 662 #define FLG_EC_USED 0x0001 /* entrance criteria met? */ 663 664 /* 665 * Move supplementary structures 666 * Sorted by symbol local/global and then by name. 667 */ 668 typedef struct psym_info { 669 Sym_desc *psym_symd; /* partially initialized symbol */ 670 Word psym_num; /* number of move entires */ 671 Half psym_flag; /* various flag */ 672 List psym_mvs; /* the list of move entries */ 673 } Psym_info; 674 675 #define FLG_PSYM_OVERLAP 0x01 /* Overlapping */ 676 677 /* 678 * One structure is allocated for a move entry. 679 */ 680 typedef struct mv_itm { 681 Xword mv_start; /* start position */ 682 Xword mv_length; /* The length of initialization */ 683 Half mv_flag; /* various flags */ 684 Is_desc *mv_isp; /* input desc. this entry is from */ 685 Move *mv_ientry; /* Input Move_entry */ 686 Word mv_oidx; /* Output Move_entry index */ 687 } Mv_itm; 688 689 #define FLG_MV_OUTSECT 0x01 /* Will be in move section */ 690 691 /* 692 * Define a move descripter used within relocation structures. 693 */ 694 struct mv_desc { 695 Move *mvd_move; 696 Sym_desc *mvd_sym; 697 }; 698 699 struct sym_desc { 700 List sd_GOTndxs; /* list of associated GOT entries */ 701 Sym *sd_sym; /* pointer to symbol table entry */ 702 Sym *sd_osym; /* copy of the original symbol entry */ 703 /* used only for local partial */ 704 Psym_info *sd_psyminfo; /* for partial symbols, maintain a */ 705 /* pointer to parsym_info */ 706 const char *sd_name; /* symbols name */ 707 Ifl_desc *sd_file; /* file where symbol is taken */ 708 Is_desc *sd_isc; /* input section of symbol definition */ 709 Sym_aux *sd_aux; /* auxiliary global symbol info. */ 710 Word sd_symndx; /* index in output symbol table */ 711 Word sd_shndx; /* sect. index sym is associated w/ */ 712 Word sd_flags; /* state flags */ 713 Half sd_flags1; /* more symbol flags */ 714 Half sd_ref; /* reference definition of symbol */ 715 }; 716 717 /* 718 * The auxiliary symbol descriptor contains the additional information (beyond 719 * the symbol descriptor) required to process global symbols. These symbols are 720 * accessed via an internal symbol hash table where locality of reference is 721 * important for performance. 722 */ 723 struct sym_aux { 724 List sa_dfiles; /* files where symbol is defined */ 725 Sym sa_sym; /* copy of symtab entry */ 726 const char *sa_vfile; /* first unavailable definition */ 727 Ifl_desc *sa_bindto; /* symbol to bind to - for translator */ 728 const char *sa_rfile; /* file with first symbol referenced */ 729 Word sa_hash; /* the pure hash value of symbol */ 730 Word sa_PLTndx; /* index into PLT for symbol */ 731 Word sa_PLTGOTndx; /* GOT entry indx for PLT indirection */ 732 Word sa_linkndx; /* index of associated symbol from */ 733 /* ET_DYN file */ 734 Half sa_symspec; /* special symbol ids */ 735 Half sa_overndx; /* output file versioning index */ 736 Half sa_dverndx; /* dependency versioning index */ 737 }; 738 739 740 /* 741 * Nodes used to track symbols in the global AVL symbol dictionary. 742 */ 743 struct sym_avlnode { 744 avl_node_t sav_node; /* AVL node */ 745 Word sav_hash; /* symbol hash value */ 746 const char *sav_name; /* symbol name */ 747 Sym_desc *sav_symdesc; /* SymDesc entry */ 748 }; 749 750 /* 751 * These are the ids for processing of `Special symbols'. They are used 752 * to set the sym->sd_aux->sa_symspec field. 753 */ 754 #define SDAUX_ID_ETEXT 1 /* etext && _etext symbol */ 755 #define SDAUX_ID_EDATA 2 /* edata && _edata symbol */ 756 #define SDAUX_ID_END 3 /* end, _end, && _END_ symbol */ 757 #define SDAUX_ID_DYN 4 /* DYNAMIC && _DYNAMIC symbol */ 758 #define SDAUX_ID_PLT 5 /* _PROCEDURE_LINKAGE_TABLE_ symbol */ 759 #define SDAUX_ID_GOT 6 /* _GLOBAL_OFFSET_TABLE_ symbol */ 760 #define SDAUX_ID_START 7 /* START_ && _START_ symbol */ 761 762 /* 763 * Flags for sym_desc.sd_flags 764 */ 765 #define FLG_SY_MVTOCOMM 0x00000001 /* assign symbol to common (.bss) */ 766 /* this is a result of a */ 767 /* copy reloc against sym */ 768 #define FLG_SY_GLOBREF 0x00000002 /* a global reference has been seen */ 769 #define FLG_SY_WEAKDEF 0x00000004 /* a weak definition has been used */ 770 #define FLG_SY_CLEAN 0x00000008 /* `Sym' entry points to original */ 771 /* input file (read-only). */ 772 #define FLG_SY_UPREQD 0x00000010 /* symbol value update is required, */ 773 /* either it's used as an entry */ 774 /* point or for relocation, but */ 775 /* it must be updated even if */ 776 /* the -s flag is in effect */ 777 #define FLG_SY_NOTAVAIL 0x00000020 /* symbol is not available to the */ 778 /* application either because it */ 779 /* originates from an implicitly */ 780 /* referenced shared object, or */ 781 /* because it is not part of a */ 782 /* specified version. */ 783 #define FLG_SY_REDUCED 0x00000040 /* a global is reduced to local */ 784 #define FLG_SY_VERSPROM 0x00000080 /* version definition has been */ 785 /* promoted to output file */ 786 #define FLG_SY_PROT 0x00000100 /* stv_protected visibility seen */ 787 788 #define FLG_SY_MAPREF 0x00000200 /* symbol reference generated by user */ 789 /* from mapfile */ 790 #define FLG_SY_REFRSD 0x00000400 /* symbols sd_ref has been raised */ 791 /* due to a copy-relocs */ 792 /* weak-strong pairing */ 793 #define FLG_SY_INTPOSE 0x00000800 /* symbol defines an interposer */ 794 #define FLG_SY_INVALID 0x00001000 /* unwanted/erroneous symbol */ 795 #define FLG_SY_SMGOT 0x00002000 /* small got index assigned to symbol */ 796 /* sparc only */ 797 #define FLG_SY_PARENT 0x00004000 /* symbol to be found in parent */ 798 /* only used with direct bindings */ 799 #define FLG_SY_LAZYLD 0x00008000 /* symbol to cause lazyloading of */ 800 /* parent object */ 801 #define FLG_SY_ISDISC 0x00010000 /* symbol is a member of a DISCARDED */ 802 /* section (COMDAT) */ 803 #define FLG_SY_PAREXPN 0x00020000 /* partially init. symbol to be */ 804 /* expanded */ 805 #define FLG_SY_PLTPAD 0x00040000 /* pltpadding has been allocated for */ 806 /* this symbol */ 807 #define FLG_SY_REGSYM 0x00080000 /* REGISTER symbol (sparc only) */ 808 #define FLG_SY_SOFOUND 0x00100000 /* compared against an SO definition */ 809 #define FLG_SY_EXTERN 0x00200000 /* symbol is external, allows -zdefs */ 810 /* error suppression */ 811 #define FLG_SY_MAPUSED 0x00400000 /* mapfile symbol used (occurred */ 812 /* within a relocatable object) */ 813 #define FLG_SY_COMMEXP 0x00800000 /* COMMON symbol which has been */ 814 /* allocated */ 815 #define FLG_SY_CMDREF 0x01000000 /* symbol was referenced from the */ 816 /* command line. (ld -u <>, */ 817 /* ld -zrtldinfo=<>, ...) */ 818 #define FLG_SY_SPECSEC 0x02000000 /* section index is reserved value */ 819 /* ABS, COMMON, ... */ 820 #define FLG_SY_TENTSYM 0x04000000 /* tentative symbol */ 821 #define FLG_SY_VISIBLE 0x08000000 /* symbols visibility determined */ 822 #define FLG_SY_STDFLTR 0x10000000 /* symbol is a standard filter */ 823 #define FLG_SY_AUXFLTR 0x20000000 /* symbol is an auxiliary filter */ 824 #define FLG_SY_DYNSORT 0x40000000 /* req. in dyn[sym|tls]sort section */ 825 #define FLG_SY_NODYNSORT 0x80000000 /* excluded from dyn[sym_tls]sort sec */ 826 827 /* 828 * Sym_desc.sd_flags1 829 */ 830 #define FLG_SY1_GLOB 0x00000001 /* global symbol, remain global */ 831 #define FLG_SY1_PROT 0x00000002 /* global symbol, reduce to protected */ 832 #define FLG_SY1_LOCL 0x00000004 /* global symbol, reduce to local */ 833 #define FLG_SY1_DIR 0x00000008 /* global symbol, direct bindings */ 834 #define FLG_SY1_NDIR 0x00000010 /* global symbol, nondirect bindings */ 835 #define FLG_SY1_ELIM 0x00000020 /* global symbol, eliminate */ 836 #define FLG_SY1_IGNORE 0x00000040 /* symbol should be ignored */ 837 838 #define MSK_SY1_DEFINED (FLG_SY1_GLOB | FLG_SY1_PROT | FLG_SY1_LOCL) 839 /* The above mask indicates that */ 840 /* a symbol has been explicitly */ 841 /* scoped, and therefore is not */ 842 /* a candidate for auto-reduction */ 843 844 /* 845 * create a mask for (Sym.St_other & visibility) since the 846 * gABI does not yet define a ELF*_ST_OTHER macro. 847 */ 848 #define MSK_SYM_VISIBILITY 0x03 849 850 /* 851 * Structure to manage the shared object definition lists. There are two lists 852 * that use this structure: 853 * 854 * o ofl_soneed; maintain the list of implicitly required dependencies 855 * (ie. shared objects needed by other shared objects). These definitions 856 * may include RPATH's required to locate the dependencies, and any 857 * version requirements. 858 * 859 * o ofl_socntl; maintains the shared object control definitions. These are 860 * provided by the user (via a mapfile) and are used to indicate any 861 * SONAME translations and verion control requirements. 862 */ 863 struct sdf_desc { 864 const char *sdf_name; /* the shared objects file name */ 865 const char *sdf_soname; /* the shared objects SONAME */ 866 char *sdf_rpath; /* library search path DT_RPATH */ 867 const char *sdf_rfile; /* referencing file for diagnostics */ 868 Ifl_desc *sdf_file; /* the final input file descriptor */ 869 List sdf_vers; /* list of versions that are required */ 870 /* from this object */ 871 List sdf_verneed; /* list of VERNEEDS to create for */ 872 /* this object (via SPECVERS or */ 873 /* ADDVERS) */ 874 Word sdf_flags; 875 }; 876 877 #define FLG_SDF_SONAME 0x02 /* An alternative SONAME is supplied */ 878 #define FLG_SDF_SELECT 0x04 /* version control selection required */ 879 #define FLG_SDF_VERIFY 0x08 /* version definition verification */ 880 /* required */ 881 #define FLG_SDF_SPECVER 0x10 /* specify VERNEEDS */ 882 #define FLG_SDF_ADDVER 0x20 /* add VERNEED references */ 883 884 /* 885 * Structure to manage shared object version usage requirements. 886 */ 887 struct sdv_desc { 888 const char *sdv_name; /* version name */ 889 const char *sdv_ref; /* versions reference */ 890 Word sdv_flags; /* flags */ 891 }; 892 893 #define FLG_SDV_MATCHED 0x01 /* VERDEF found and matched */ 894 895 /* 896 * Structures to manage versioning information. Two versioning structures are 897 * defined: 898 * 899 * o a version descriptor maintains a linked list of versions and their 900 * associated dependencies. This is used to build the version definitions 901 * for an image being created (see map_symbol), and to determine the 902 * version dependency graph for any input files that are versioned. 903 * 904 * o a version index array contains each version of an input file that is 905 * being processed. It informs us which versions are available for 906 * binding, and is used to generate any version dependency information. 907 */ 908 struct ver_desc { 909 const char *vd_name; /* version name */ 910 Word vd_hash; /* hash value of name */ 911 Ifl_desc *vd_file; /* file that defined version */ 912 Half vd_ndx; /* coordinates with symbol index */ 913 Half vd_flags; /* version information */ 914 List vd_deps; /* version dependencies */ 915 Ver_desc *vd_ref; /* dependency's first reference */ 916 }; 917 918 struct ver_index { 919 const char *vi_name; /* dependency version name */ 920 Half vi_flags; /* communicates availability */ 921 Ver_desc *vi_desc; /* cross reference to descriptor */ 922 }; 923 924 /* 925 * Define any internal version descriptor flags ([vd|vi]_flags). Note that the 926 * first byte is reserved for user visible flags (refer VER_FLG's in link.h). 927 */ 928 #define MSK_VER_USER 0x0f /* mask for user visible flags */ 929 930 #define FLG_VER_AVAIL 0x10 /* version is available for binding */ 931 #define FLG_VER_REFER 0x20 /* version has been referenced */ 932 #define FLG_VER_SELECT 0x40 /* version has been selected by user */ 933 #define FLG_VER_CYCLIC 0x80 /* a member of cyclic dependency */ 934 935 936 /* 937 * isalist(1) descriptor - used to break an isalist string into its component 938 * options. 939 */ 940 struct isa_opt { 941 char *isa_name; /* individual isa option name */ 942 size_t isa_namesz; /* and associated size */ 943 }; 944 945 struct isa_desc { 946 char *isa_list; /* sysinfo(SI_ISALIST) list */ 947 size_t isa_listsz; /* and associated size */ 948 Isa_opt *isa_opt; /* table of individual isa options */ 949 size_t isa_optno; /* and associated number */ 950 }; 951 952 /* 953 * uname(2) descriptor - used to break a utsname structure into its component 954 * options (at least those that we're interested in). 955 */ 956 struct uts_desc { 957 char *uts_osname; /* operating system name */ 958 size_t uts_osnamesz; /* and associated size */ 959 char *uts_osrel; /* operating system release */ 960 size_t uts_osrelsz; /* and associated size */ 961 }; 962 963 964 /* 965 * SHT_GROUP descriptor - used to track group sections at the global 966 * level to resolve conflicts/determine which to keep. 967 */ 968 struct group_desc { 969 const char *gd_gsectname; /* group section name */ 970 const char *gd_symname; /* symbol name */ 971 Word *gd_data; /* data for group section */ 972 size_t gd_scnndx; /* group section index */ 973 size_t gd_cnt; /* number of entries in group data */ 974 Word gd_flags; 975 }; 976 977 #define GRP_FLG_DISCARD 0x0001 /* group is to be discarded */ 978 979 /* 980 * Indexes into the ld_support_funcs[] table. 981 */ 982 typedef enum { 983 LDS_VERSION = 0, 984 LDS_INPUT_DONE, 985 LDS_START, 986 LDS_ATEXIT, 987 LDS_OPEN, 988 LDS_FILE, 989 LDS_INSEC, 990 LDS_SEC, 991 LDS_NUM 992 } Support_ndx; 993 994 995 /* 996 * Structure to manage archive member caching. Each archive has an archive 997 * descriptor (Ar_desc) associated with it. This contains pointers to the 998 * archive symbol table (obtained by elf_getarsyms(3e)) and an auxiliary 999 * structure (Ar_uax[]) that parallels this symbol table. The member element 1000 * of this auxiliary table indicates whether the archive member associated with 1001 * the symbol offset has already been extracted (AREXTRACTED) or partially 1002 * processed (refer process_member()). 1003 */ 1004 typedef struct ar_mem { 1005 Elf *am_elf; /* elf descriptor for this member */ 1006 char *am_name; /* members name */ 1007 char *am_path; /* path (ie. lib(foo.o)) */ 1008 Sym *am_syms; /* start of global symbols */ 1009 char *am_strs; /* associated string table start */ 1010 Xword am_symn; /* no. of global symbols */ 1011 } Ar_mem; 1012 1013 typedef struct ar_aux { 1014 Sym_desc *au_syms; /* internal symbol descriptor */ 1015 Ar_mem *au_mem; /* associated member */ 1016 } Ar_aux; 1017 1018 #define FLG_ARMEM_PROC (Ar_mem *)-1 1019 1020 typedef struct ar_desc { 1021 const char *ad_name; /* archive file name */ 1022 Elf *ad_elf; /* elf descriptor for the archive */ 1023 Elf_Arsym *ad_start; /* archive symbol table start */ 1024 Ar_aux *ad_aux; /* auxiliary symbol information */ 1025 dev_t ad_stdev; /* device id and inode number for */ 1026 ino_t ad_stino; /* multiple inclusion checks */ 1027 Word ad_flags; /* archive specific cmd line flags */ 1028 } Ar_desc; 1029 1030 /* 1031 * Define any archive descriptor flags. NOTE, make sure they do not clash with 1032 * any output file descriptor archive extraction flags, as these are saved in 1033 * the same entry (see MSK_OF1_ARCHIVE). 1034 */ 1035 #define FLG_ARD_EXTRACT 0x00010000 /* archive member has been extracted */ 1036 1037 /* 1038 * Function Declarations. 1039 */ 1040 #if defined(_ELF64) 1041 1042 #define ld_create_outfile ld64_create_outfile 1043 #define ld_ent_setup ld64_ent_setup 1044 #define ld_init_strings ld64_init_strings 1045 #define ld_make_sections ld64_make_sections 1046 #define ld_main ld64_main 1047 #define ld_ofl_cleanup ld64_ofl_cleanup 1048 #define ld_process_open ld64_process_open 1049 #define ld_reloc_init ld64_reloc_init 1050 #define ld_reloc_process ld64_reloc_process 1051 #define ld_sym_validate ld64_sym_validate 1052 #define ld_update_outfile ld64_update_outfile 1053 1054 #else 1055 1056 #define ld_create_outfile ld32_create_outfile 1057 #define ld_ent_setup ld32_ent_setup 1058 #define ld_init_strings ld32_init_strings 1059 #define ld_make_sections ld32_make_sections 1060 #define ld_main ld32_main 1061 #define ld_ofl_cleanup ld32_ofl_cleanup 1062 #define ld_process_open ld32_process_open 1063 #define ld_reloc_init ld32_reloc_init 1064 #define ld_reloc_process ld32_reloc_process 1065 #define ld_sym_validate ld32_sym_validate 1066 #define ld_update_outfile ld32_update_outfile 1067 1068 #endif 1069 1070 extern int ld32_main(int, char **); 1071 extern int ld64_main(int, char **); 1072 1073 extern uintptr_t ld_create_outfile(Ofl_desc *); 1074 extern uintptr_t ld_ent_setup(Ofl_desc *, Xword); 1075 extern uintptr_t ld_init_strings(Ofl_desc *); 1076 extern uintptr_t ld_make_sections(Ofl_desc *); 1077 extern void ld_ofl_cleanup(Ofl_desc *); 1078 extern Ifl_desc *ld_process_open(const char *, const char *, int *, 1079 Ofl_desc *, Word, Rej_desc *); 1080 extern uintptr_t ld_reloc_init(Ofl_desc *); 1081 extern uintptr_t ld_reloc_process(Ofl_desc *); 1082 extern uintptr_t ld_sym_validate(Ofl_desc *); 1083 extern uintptr_t ld_update_outfile(Ofl_desc *); 1084 1085 #ifdef __cplusplus 1086 } 1087 #endif 1088 1089 #endif /* _LIBLD_H */ 1090