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 2014 Garrett D'Amore <garrett@damore.org> 27 * 28 * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. 29 */ 30 31 #ifndef _SYS_LINK_H 32 #define _SYS_LINK_H 33 34 #ifndef _ASM 35 #include <sys/types.h> 36 #include <sys/elftypes.h> 37 #endif 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 /* 44 * Communication structures for the runtime linker. 45 */ 46 47 /* 48 * The following data structure provides a self-identifying union consisting 49 * of a tag from a known list and a value. 50 */ 51 #ifndef _ASM 52 typedef struct { 53 Elf32_Sword d_tag; /* how to interpret value */ 54 union { 55 Elf32_Word d_val; 56 Elf32_Addr d_ptr; 57 Elf32_Off d_off; 58 } d_un; 59 } Elf32_Dyn; 60 61 #if defined(_LP64) || defined(_LONGLONG_TYPE) 62 typedef struct { 63 Elf64_Xword d_tag; /* how to interpret value */ 64 union { 65 Elf64_Xword d_val; 66 Elf64_Addr d_ptr; 67 } d_un; 68 } Elf64_Dyn; 69 #endif /* defined(_LP64) || defined(_LONGLONG_TYPE) */ 70 #endif /* _ASM */ 71 72 /* 73 * Tag values 74 */ 75 #define DT_NULL 0 /* last entry in list */ 76 #define DT_NEEDED 1 /* a needed object */ 77 #define DT_PLTRELSZ 2 /* size of relocations for the PLT */ 78 #define DT_PLTGOT 3 /* addresses used by procedure linkage table */ 79 #define DT_HASH 4 /* hash table */ 80 #define DT_STRTAB 5 /* string table */ 81 #define DT_SYMTAB 6 /* symbol table */ 82 #define DT_RELA 7 /* addr of relocation entries */ 83 #define DT_RELASZ 8 /* size of relocation table */ 84 #define DT_RELAENT 9 /* base size of relocation entry */ 85 #define DT_STRSZ 10 /* size of string table */ 86 #define DT_SYMENT 11 /* size of symbol table entry */ 87 #define DT_INIT 12 /* _init addr */ 88 #define DT_FINI 13 /* _fini addr */ 89 #define DT_SONAME 14 /* name of this shared object */ 90 #define DT_RPATH 15 /* run-time search path */ 91 #define DT_SYMBOLIC 16 /* shared object linked -Bsymbolic */ 92 #define DT_REL 17 /* addr of relocation entries */ 93 #define DT_RELSZ 18 /* size of relocation table */ 94 #define DT_RELENT 19 /* base size of relocation entry */ 95 #define DT_PLTREL 20 /* relocation type for PLT entry */ 96 #define DT_DEBUG 21 /* pointer to r_debug structure */ 97 #define DT_TEXTREL 22 /* text relocations remain for this object */ 98 #define DT_JMPREL 23 /* pointer to the PLT relocation entries */ 99 #define DT_BIND_NOW 24 /* perform all relocations at load of object */ 100 #define DT_INIT_ARRAY 25 /* pointer to .init_array */ 101 #define DT_FINI_ARRAY 26 /* pointer to .fini_array */ 102 #define DT_INIT_ARRAYSZ 27 /* size of .init_array */ 103 #define DT_FINI_ARRAYSZ 28 /* size of .fini_array */ 104 #define DT_RUNPATH 29 /* run-time search path */ 105 #define DT_FLAGS 30 /* state flags - see DF_* */ 106 107 /* 108 * DT_* encoding rules: The value of each dynamic tag determines the 109 * interpretation of the d_un union. This convention provides for simpler 110 * interpretation of dynamic tags by external tools. A tag whose value 111 * is an even number indicates a dynamic section entry that uses d_ptr. 112 * A tag whose value is an odd number indicates a dynamic section entry 113 * that uses d_val, or that uses neither d_ptr nor d_val. 114 * 115 * There are exceptions to the above rule: 116 * - Tags with values that are less than DT_ENCODING. 117 * - Tags with values that fall between DT_LOOS and DT_SUNW_ENCODING 118 * - Tags with values that fall between DT_HIOS and DT_LOPROC 119 * 120 * Third party tools must handle these exception ranges explicitly 121 * on an item by item basis. 122 */ 123 #define DT_ENCODING 32 /* positive tag DT_* encoding rules */ 124 /* start after this */ 125 #define DT_PREINIT_ARRAY 32 /* pointer to .preinit_array */ 126 #define DT_PREINIT_ARRAYSZ 33 /* size of .preinit_array */ 127 128 #define DT_MAXPOSTAGS 34 /* number of positive tags */ 129 130 /* 131 * DT_* encoding rules do not apply between DT_LOOS and DT_SUNW_ENCODING 132 */ 133 #define DT_LOOS 0x6000000d /* OS specific range */ 134 #define DT_SUNW_AUXILIARY 0x6000000d /* symbol auxiliary name */ 135 #define DT_SUNW_RTLDINF 0x6000000e /* ld.so.1 info (private) */ 136 #define DT_SUNW_FILTER 0x6000000f /* symbol filter name */ 137 #define DT_SUNW_CAP 0x60000010 /* hardware/software */ 138 /* capabilities */ 139 #define DT_SUNW_SYMTAB 0x60000011 /* symtab with local fcn */ 140 /* symbols immediately */ 141 /* preceding DT_SYMTAB */ 142 #define DT_SUNW_SYMSZ 0x60000012 /* Size of SUNW_SYMTAB table */ 143 144 /* 145 * DT_* encoding rules apply between DT_SUNW_ENCODING and DT_HIOS 146 */ 147 #define DT_SUNW_ENCODING 0x60000013 /* DT_* encoding rules resume */ 148 /* after this */ 149 #define DT_SUNW_SORTENT 0x60000013 /* sizeof [SYM|TLS]SORT entry */ 150 #define DT_SUNW_SYMSORT 0x60000014 /* sym indices sorted by addr */ 151 #define DT_SUNW_SYMSORTSZ 0x60000015 /* size of SUNW_SYMSORT */ 152 #define DT_SUNW_TLSSORT 0x60000016 /* tls sym ndx sort by offset */ 153 #define DT_SUNW_TLSSORTSZ 0x60000017 /* size of SUNW_TLSSORT */ 154 #define DT_SUNW_CAPINFO 0x60000018 /* capabilities symbols */ 155 #define DT_SUNW_STRPAD 0x60000019 /* # of unused bytes at the */ 156 /* end of dynstr */ 157 #define DT_SUNW_CAPCHAIN 0x6000001a /* capabilities chain info */ 158 #define DT_SUNW_LDMACH 0x6000001b /* EM_ machine code of linker */ 159 /* that produced object */ 160 #define DT_SUNW_CAPCHAINENT 0x6000001d /* capabilities chain entry */ 161 #define DT_SUNW_CAPCHAINSZ 0x6000001f /* capabilities chain size */ 162 /* 0x60000021 would be DT_SUNW_PARENT */ 163 #define DT_SUNW_ASLR 0x60000023 /* executable ASLR desire */ 164 165 /* 166 * DT_* encoding rules do not apply between DT_HIOS and DT_LOPROC 167 */ 168 #define DT_HIOS 0x6ffff000 169 170 /* 171 * The following values have been deprecated and remain here to allow 172 * compatibility with older binaries. 173 */ 174 #define DT_DEPRECATED_SPARC_REGISTER 0x7000001 175 176 /* 177 * DT_* entries which fall between DT_VALRNGHI & DT_VALRNGLO use the 178 * Dyn.d_un.d_val field of the Elf*_Dyn structure. 179 */ 180 #define DT_VALRNGLO 0x6ffffd00 181 182 #define DT_GNU_PRELINKED 0x6ffffdf5 /* prelinking timestamp (unused) */ 183 #define DT_GNU_CONFLICTSZ 0x6ffffdf6 /* size of conflict section (unused) */ 184 #define DT_GNU_LIBLISTSZ 0x6ffffdf7 /* size of library list (unused) */ 185 #define DT_CHECKSUM 0x6ffffdf8 /* elf checksum */ 186 #define DT_PLTPADSZ 0x6ffffdf9 /* pltpadding size */ 187 #define DT_MOVEENT 0x6ffffdfa /* move table entry size */ 188 #define DT_MOVESZ 0x6ffffdfb /* move table size */ 189 #define DT_FEATURE_1 0x6ffffdfc /* feature holder (unused) */ 190 #define DT_POSFLAG_1 0x6ffffdfd /* flags for DT_* entries, effecting */ 191 /* the following DT_* entry. */ 192 /* See DF_P1_* definitions */ 193 #define DT_SYMINSZ 0x6ffffdfe /* syminfo table size (in bytes) */ 194 #define DT_SYMINENT 0x6ffffdff /* syminfo entry size (in bytes) */ 195 #define DT_VALRNGHI 0x6ffffdff 196 197 /* 198 * DT_* entries which fall between DT_ADDRRNGHI & DT_ADDRRNGLO use the 199 * Dyn.d_un.d_ptr field of the Elf*_Dyn structure. 200 * 201 * If any adjustment is made to the ELF object after it has been 202 * built, these entries will need to be adjusted. 203 */ 204 #define DT_ADDRRNGLO 0x6ffffe00 205 206 #define DT_GNU_HASH 0x6ffffef5 /* GNU-style hash table (unused) */ 207 #define DT_TLSDESC_PLT 0x6ffffef6 /* GNU (unused) */ 208 #define DT_TLSDESC_GOT 0x6ffffef7 /* GNU (unused) */ 209 #define DT_GNU_CONFLICT 0x6ffffef8 /* start of conflict section (unused) */ 210 #define DT_GNU_LIBLIST 0x6ffffef9 /* Library list (unused) */ 211 212 #define DT_CONFIG 0x6ffffefa /* configuration information */ 213 #define DT_DEPAUDIT 0x6ffffefb /* dependency auditing */ 214 #define DT_AUDIT 0x6ffffefc /* object auditing */ 215 #define DT_PLTPAD 0x6ffffefd /* pltpadding (sparcv9) */ 216 #define DT_MOVETAB 0x6ffffefe /* move table */ 217 #define DT_SYMINFO 0x6ffffeff /* syminfo table */ 218 #define DT_ADDRRNGHI 0x6ffffeff 219 220 /* 221 * The following DT_* entries should have been assigned within one of the 222 * DT_* ranges, but existed before such ranges had been established. 223 */ 224 #define DT_VERSYM 0x6ffffff0 /* version symbol table - unused by */ 225 /* Solaris (see libld/update.c) */ 226 227 #define DT_RELACOUNT 0x6ffffff9 /* number of RELATIVE relocations */ 228 #define DT_RELCOUNT 0x6ffffffa /* number of RELATIVE relocations */ 229 #define DT_FLAGS_1 0x6ffffffb /* state flags - see DF_1_* defs */ 230 #define DT_VERDEF 0x6ffffffc /* version definition table and */ 231 #define DT_VERDEFNUM 0x6ffffffd /* associated no. of entries */ 232 #define DT_VERNEED 0x6ffffffe /* version needed table and */ 233 #define DT_VERNEEDNUM 0x6fffffff /* associated no. of entries */ 234 235 /* 236 * DT_* entries between DT_HIPROC and DT_LOPROC are reserved for processor 237 * specific semantics. 238 * 239 * DT_* encoding rules apply to all tag values larger than DT_LOPROC. 240 */ 241 #define DT_LOPROC 0x70000000 /* processor specific range */ 242 #define DT_AUXILIARY 0x7ffffffd /* shared library auxiliary name */ 243 #define DT_USED 0x7ffffffe /* ignored - same as needed */ 244 #define DT_FILTER 0x7fffffff /* shared library filter name */ 245 #define DT_HIPROC 0x7fffffff 246 247 248 /* 249 * Values for DT_FLAGS 250 */ 251 #define DF_ORIGIN 0x00000001 /* ORIGIN processing required */ 252 #define DF_SYMBOLIC 0x00000002 /* symbolic bindings in effect */ 253 #define DF_TEXTREL 0x00000004 /* text relocations remain */ 254 #define DF_BIND_NOW 0x00000008 /* process all relocations */ 255 #define DF_STATIC_TLS 0x00000010 /* obj. contains static TLS refs */ 256 257 /* 258 * Values for the DT_POSFLAG_1 .dynamic entry. 259 * These values only affect the following DT_* entry. 260 */ 261 #define DF_P1_LAZYLOAD 0x00000001 /* following object is to be */ 262 /* lazy loaded */ 263 #define DF_P1_GROUPPERM 0x00000002 /* following object's symbols are */ 264 /* not available for general */ 265 /* symbol bindings. */ 266 #define DF_P1_DEFERRED 0x00000004 /* following object is deferred */ 267 268 /* 269 * Values for the DT_FLAGS_1 .dynamic entry. 270 */ 271 #define DF_1_NOW 0x00000001 /* set RTLD_NOW for this object */ 272 #define DF_1_GLOBAL 0x00000002 /* set RTLD_GLOBAL for this object */ 273 #define DF_1_GROUP 0x00000004 /* set RTLD_GROUP for this object */ 274 #define DF_1_NODELETE 0x00000008 /* set RTLD_NODELETE for this object */ 275 #define DF_1_LOADFLTR 0x00000010 /* trigger filtee loading at runtime */ 276 #define DF_1_INITFIRST 0x00000020 /* set RTLD_INITFIRST for this object */ 277 #define DF_1_NOOPEN 0x00000040 /* set RTLD_NOOPEN for this object */ 278 #define DF_1_ORIGIN 0x00000080 /* ORIGIN processing required */ 279 #define DF_1_DIRECT 0x00000100 /* direct binding enabled */ 280 #define DF_1_TRANS 0x00000200 /* unused obsolete name */ 281 #define DF_1_INTERPOSE 0x00000400 /* object is an interposer */ 282 #define DF_1_NODEFLIB 0x00000800 /* ignore default library search path */ 283 #define DF_1_NODUMP 0x00001000 /* object can't be dldump(3x)'ed */ 284 #define DF_1_CONFALT 0x00002000 /* configuration alternative created */ 285 #define DF_1_ENDFILTEE 0x00004000 /* filtee terminates filters search */ 286 #define DF_1_DISPRELDNE 0x00008000 /* disp reloc applied at build time */ 287 #define DF_1_DISPRELPND 0x00010000 /* disp reloc applied at run-time */ 288 #define DF_1_NODIRECT 0x00020000 /* object contains symbols that */ 289 /* cannot be directly bound to */ 290 #define DF_1_IGNMULDEF 0x00040000 /* internal: krtld ignore muldefs */ 291 #define DF_1_NOKSYMS 0x00080000 /* internal: don't export object's */ 292 /* symbols via /dev/ksyms */ 293 #define DF_1_NOHDR 0x00100000 /* mapfile: 1st segment mapping */ 294 /* omits ELF & program headers */ 295 #define DF_1_EDITED 0x00200000 /* object has been modified since */ 296 /* being built by 'ld' */ 297 #define DF_1_NORELOC 0x00400000 /* internal: unrelocated object */ 298 #define DF_1_SYMINTPOSE 0x00800000 /* individual symbol interposers */ 299 /* exist */ 300 #define DF_1_GLOBAUDIT 0x01000000 /* establish global auditing */ 301 #define DF_1_SINGLETON 0x02000000 /* singleton symbols exist */ 302 303 /* 304 * Values set to DT_FEATURE_1 tag's d_val (unused obsolete tag) 305 */ 306 #define DTF_1_PARINIT 0x00000001 /* partially initialization feature */ 307 #define DTF_1_CONFEXP 0x00000002 /* configuration file expected */ 308 309 310 /* 311 * Version structures. There are three types of version structure: 312 * 313 * o A definition of the versions within the image itself. 314 * Each version definition is assigned a unique index (starting from 315 * VER_NDX_BGNDEF) which is used to cross-reference symbols associated to 316 * the version. Each version can have one or more dependencies on other 317 * version definitions within the image. The version name, and any 318 * dependency names, are specified in the version definition auxiliary 319 * array. Version definition entries require a version symbol index table. 320 * 321 * o A version requirement on a needed dependency. Each needed entry 322 * specifies the shared object dependency (as specified in DT_NEEDED). 323 * One or more versions required from this dependency are specified in the 324 * version needed auxiliary array. 325 * 326 * o A version symbol index table. Each symbol indexes into this array 327 * to determine its version index. Index values of VER_NDX_BGNDEF or 328 * greater indicate the version definition to which a symbol is associated. 329 * (the size of a symbol index entry is recorded in the sh_info field). 330 */ 331 #ifndef _ASM 332 333 typedef struct { /* Version Definition Structure. */ 334 Elf32_Half vd_version; /* this structures version revision */ 335 Elf32_Half vd_flags; /* version information */ 336 Elf32_Half vd_ndx; /* version index */ 337 Elf32_Half vd_cnt; /* no. of associated aux entries */ 338 Elf32_Word vd_hash; /* version name hash value */ 339 Elf32_Word vd_aux; /* no. of bytes from start of this */ 340 /* verdef to verdaux array */ 341 Elf32_Word vd_next; /* no. of bytes from start of this */ 342 } Elf32_Verdef; /* verdef to next verdef entry */ 343 344 typedef struct { /* Verdef Auxiliary Structure. */ 345 Elf32_Word vda_name; /* first element defines the version */ 346 /* name. Additional entries */ 347 /* define dependency names. */ 348 Elf32_Word vda_next; /* no. of bytes from start of this */ 349 } Elf32_Verdaux; /* verdaux to next verdaux entry */ 350 351 352 typedef struct { /* Version Requirement Structure. */ 353 Elf32_Half vn_version; /* this structures version revision */ 354 Elf32_Half vn_cnt; /* no. of associated aux entries */ 355 Elf32_Word vn_file; /* name of needed dependency (file) */ 356 Elf32_Word vn_aux; /* no. of bytes from start of this */ 357 /* verneed to vernaux array */ 358 Elf32_Word vn_next; /* no. of bytes from start of this */ 359 } Elf32_Verneed; /* verneed to next verneed entry */ 360 361 typedef struct { /* Verneed Auxiliary Structure. */ 362 Elf32_Word vna_hash; /* version name hash value */ 363 Elf32_Half vna_flags; /* version information */ 364 Elf32_Half vna_other; 365 Elf32_Word vna_name; /* version name */ 366 Elf32_Word vna_next; /* no. of bytes from start of this */ 367 } Elf32_Vernaux; /* vernaux to next vernaux entry */ 368 369 typedef Elf32_Half Elf32_Versym; /* Version symbol index array */ 370 371 typedef struct { 372 Elf32_Half si_boundto; /* direct bindings - symbol bound to */ 373 Elf32_Half si_flags; /* per symbol flags */ 374 } Elf32_Syminfo; 375 376 377 #if defined(_LP64) || defined(_LONGLONG_TYPE) 378 typedef struct { 379 Elf64_Half vd_version; /* this structures version revision */ 380 Elf64_Half vd_flags; /* version information */ 381 Elf64_Half vd_ndx; /* version index */ 382 Elf64_Half vd_cnt; /* no. of associated aux entries */ 383 Elf64_Word vd_hash; /* version name hash value */ 384 Elf64_Word vd_aux; /* no. of bytes from start of this */ 385 /* verdef to verdaux array */ 386 Elf64_Word vd_next; /* no. of bytes from start of this */ 387 } Elf64_Verdef; /* verdef to next verdef entry */ 388 389 typedef struct { 390 Elf64_Word vda_name; /* first element defines the version */ 391 /* name. Additional entries */ 392 /* define dependency names. */ 393 Elf64_Word vda_next; /* no. of bytes from start of this */ 394 } Elf64_Verdaux; /* verdaux to next verdaux entry */ 395 396 typedef struct { 397 Elf64_Half vn_version; /* this structures version revision */ 398 Elf64_Half vn_cnt; /* no. of associated aux entries */ 399 Elf64_Word vn_file; /* name of needed dependency (file) */ 400 Elf64_Word vn_aux; /* no. of bytes from start of this */ 401 /* verneed to vernaux array */ 402 Elf64_Word vn_next; /* no. of bytes from start of this */ 403 } Elf64_Verneed; /* verneed to next verneed entry */ 404 405 typedef struct { 406 Elf64_Word vna_hash; /* version name hash value */ 407 Elf64_Half vna_flags; /* version information */ 408 Elf64_Half vna_other; 409 Elf64_Word vna_name; /* version name */ 410 Elf64_Word vna_next; /* no. of bytes from start of this */ 411 } Elf64_Vernaux; /* vernaux to next vernaux entry */ 412 413 typedef Elf64_Half Elf64_Versym; 414 415 typedef struct { 416 Elf64_Half si_boundto; /* direct bindings - symbol bound to */ 417 Elf64_Half si_flags; /* per symbol flags */ 418 } Elf64_Syminfo; 419 #endif /* defined(_LP64) || defined(_LONGLONG_TYPE) */ 420 421 #endif /* _ASM */ 422 423 /* 424 * Versym symbol index values. Values greater than VER_NDX_GLOBAL 425 * and less then VER_NDX_LORESERVE associate symbols with user 426 * specified version descriptors. 427 */ 428 #define VER_NDX_LOCAL 0 /* symbol is local */ 429 #define VER_NDX_GLOBAL 1 /* symbol is global and assigned to */ 430 /* the base version */ 431 #define VER_NDX_LORESERVE 0xff00 /* beginning of RESERVED entries */ 432 #define VER_NDX_ELIMINATE 0xff01 /* symbol is to be eliminated */ 433 434 /* 435 * Verdef (vd_flags) and Vernaux (vna_flags) flags values. 436 */ 437 #define VER_FLG_BASE 0x1 /* version definition of file itself */ 438 /* (Verdef only) */ 439 #define VER_FLG_WEAK 0x2 /* weak version identifier */ 440 #define VER_FLG_INFO 0x4 /* version is recorded in object for */ 441 /* informational purposes */ 442 /* (Versym reference) only. No */ 443 /* runtime verification is */ 444 /* required. (Vernaux only) */ 445 446 /* 447 * Verdef version values. 448 */ 449 #define VER_DEF_NONE 0 /* Ver_def version */ 450 #define VER_DEF_CURRENT 1 451 #define VER_DEF_NUM 2 452 453 /* 454 * Verneed version values. 455 */ 456 #define VER_NEED_NONE 0 /* Ver_need version */ 457 #define VER_NEED_CURRENT 1 458 #define VER_NEED_NUM 2 459 460 461 /* 462 * Syminfo flag values 463 */ 464 #define SYMINFO_FLG_DIRECT 0x0001 /* symbol ref has direct association */ 465 /* to object containing defn. */ 466 #define SYMINFO_FLG_FILTER 0x0002 /* symbol ref is associated to a */ 467 /* standard filter */ 468 #define SYMINFO_FLG_PASSTHRU SYMINFO_FLG_FILTER /* unused obsolete name */ 469 #define SYMINFO_FLG_COPY 0x0004 /* symbol is a copy-reloc */ 470 #define SYMINFO_FLG_LAZYLOAD 0x0008 /* object containing defn. should be */ 471 /* lazily-loaded */ 472 #define SYMINFO_FLG_DIRECTBIND 0x0010 /* ref should be bound directly to */ 473 /* object containing defn. */ 474 #define SYMINFO_FLG_NOEXTDIRECT 0x0020 /* don't let an external reference */ 475 /* directly bind to this symbol */ 476 #define SYMINFO_FLG_AUXILIARY 0x0040 /* symbol ref is associated to a */ 477 /* auxiliary filter */ 478 #define SYMINFO_FLG_INTERPOSE 0x0080 /* symbol defines an interposer */ 479 #define SYMINFO_FLG_CAP 0x0100 /* symbol is capabilities specific */ 480 #define SYMINFO_FLG_DEFERRED 0x0200 /* symbol should not be included in */ 481 /* BIND_NOW relocations */ 482 483 /* 484 * Syminfo.si_boundto values. 485 */ 486 #define SYMINFO_BT_SELF 0xffff /* symbol bound to self */ 487 #define SYMINFO_BT_PARENT 0xfffe /* symbol bound to parent */ 488 #define SYMINFO_BT_NONE 0xfffd /* no special symbol binding */ 489 #define SYMINFO_BT_EXTERN 0xfffc /* symbol defined as external */ 490 #define SYMINFO_BT_LOWRESERVE 0xff00 /* beginning of reserved entries */ 491 492 /* 493 * Syminfo version values. 494 */ 495 #define SYMINFO_NONE 0 /* Syminfo version */ 496 #define SYMINFO_CURRENT 1 497 #define SYMINFO_NUM 2 498 499 500 /* 501 * Public structure defined and maintained within the runtime linker 502 */ 503 #ifndef _ASM 504 505 typedef struct link_map Link_map; 506 507 struct link_map { 508 unsigned long l_addr; /* address at which object is mapped */ 509 char *l_name; /* full name of loaded object */ 510 #ifdef _LP64 511 Elf64_Dyn *l_ld; /* dynamic structure of object */ 512 #else 513 Elf32_Dyn *l_ld; /* dynamic structure of object */ 514 #endif 515 Link_map *l_next; /* next link object */ 516 Link_map *l_prev; /* previous link object */ 517 char *l_refname; /* filters reference name */ 518 }; 519 520 #ifdef _SYSCALL32 521 typedef struct link_map32 Link_map32; 522 523 struct link_map32 { 524 Elf32_Word l_addr; 525 Elf32_Addr l_name; 526 Elf32_Addr l_ld; 527 Elf32_Addr l_next; 528 Elf32_Addr l_prev; 529 Elf32_Addr l_refname; 530 }; 531 #endif 532 533 typedef enum { 534 RT_CONSISTENT, 535 RT_ADD, 536 RT_DELETE 537 } r_state_e; 538 539 typedef enum { 540 RD_FL_NONE = 0, /* no flags */ 541 RD_FL_ODBG = (1<<0), /* old style debugger present */ 542 RD_FL_DBG = (1<<1) /* debugging enabled */ 543 } rd_flags_e; 544 545 546 547 /* 548 * Debugging events enabled inside of the runtime linker. To 549 * access these events see the librtld_db interface. 550 */ 551 typedef enum { 552 RD_NONE = 0, /* no event */ 553 RD_PREINIT, /* the Initial rendezvous before .init */ 554 RD_POSTINIT, /* the Second rendezvous after .init */ 555 RD_DLACTIVITY /* a dlopen or dlclose has happened */ 556 } rd_event_e; 557 558 struct r_debug { 559 int r_version; /* debugging info version no. */ 560 Link_map *r_map; /* address of link_map */ 561 unsigned long r_brk; /* address of update routine */ 562 r_state_e r_state; 563 unsigned long r_ldbase; /* base addr of ld.so */ 564 Link_map *r_ldsomap; /* address of ld.so.1's link map */ 565 rd_event_e r_rdevent; /* debug event */ 566 rd_flags_e r_flags; /* misc flags. */ 567 }; 568 569 #ifdef _SYSCALL32 570 struct r_debug32 { 571 Elf32_Word r_version; /* debugging info version no. */ 572 Elf32_Addr r_map; /* address of link_map */ 573 Elf32_Word r_brk; /* address of update routine */ 574 r_state_e r_state; 575 Elf32_Word r_ldbase; /* base addr of ld.so */ 576 Elf32_Addr r_ldsomap; /* address of ld.so.1's link map */ 577 rd_event_e r_rdevent; /* debug event */ 578 rd_flags_e r_flags; /* misc flags. */ 579 }; 580 #endif 581 582 583 #define R_DEBUG_VERSION 2 /* current r_debug version */ 584 #endif /* _ASM */ 585 586 /* 587 * Attribute/value structures used to bootstrap ELF-based dynamic linker. 588 */ 589 #ifndef _ASM 590 typedef struct { 591 Elf32_Sword eb_tag; /* what this one is */ 592 union { /* possible values */ 593 Elf32_Word eb_val; 594 Elf32_Addr eb_ptr; 595 Elf32_Off eb_off; 596 } eb_un; 597 } Elf32_Boot; 598 599 #if defined(_LP64) || defined(_LONGLONG_TYPE) 600 typedef struct { 601 Elf64_Xword eb_tag; /* what this one is */ 602 union { /* possible values */ 603 Elf64_Xword eb_val; 604 Elf64_Addr eb_ptr; 605 Elf64_Off eb_off; 606 } eb_un; 607 } Elf64_Boot; 608 #endif /* defined(_LP64) || defined(_LONGLONG_TYPE) */ 609 #endif /* _ASM */ 610 611 /* 612 * Attributes 613 */ 614 #define EB_NULL 0 /* (void) last entry */ 615 #define EB_DYNAMIC 1 /* (*) dynamic structure of subject */ 616 #define EB_LDSO_BASE 2 /* (caddr_t) base address of ld.so */ 617 #define EB_ARGV 3 /* (caddr_t) argument vector */ 618 #define EB_ENVP 4 /* (char **) environment strings */ 619 #define EB_AUXV 5 /* (auxv_t *) auxiliary vector */ 620 #define EB_DEVZERO 6 /* (int) fd for /dev/zero */ 621 #define EB_PAGESIZE 7 /* (int) page size */ 622 #define EB_MAX 8 /* number of "EBs" */ 623 #define EB_MAX_SIZE32 64 /* size in bytes, _ILP32 */ 624 #define EB_MAX_SIZE64 128 /* size in bytes, _LP64 */ 625 626 627 #ifndef _ASM 628 629 /* 630 * Concurrency communication structure for libc callbacks. 631 */ 632 extern void _ld_libc(void *); 633 634 #pragma unknown_control_flow(_ld_libc) 635 #endif /* _ASM */ 636 637 #ifdef __cplusplus 638 } 639 #endif 640 641 #endif /* _SYS_LINK_H */ 642