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 (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. 27 */ 28 29 #ifndef _SYS_LINK_H 30 #define _SYS_LINK_H 31 32 #ifndef _ASM 33 #include <sys/types.h> 34 #include <sys/elftypes.h> 35 #endif 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 /* 42 * Communication structures for the runtime linker. 43 */ 44 45 /* 46 * The following data structure provides a self-identifying union consisting 47 * of a tag from a known list and a value. 48 */ 49 #ifndef _ASM 50 typedef struct { 51 Elf32_Sword d_tag; /* how to interpret value */ 52 union { 53 Elf32_Word d_val; 54 Elf32_Addr d_ptr; 55 Elf32_Off d_off; 56 } d_un; 57 } Elf32_Dyn; 58 59 #if defined(_LP64) || defined(_LONGLONG_TYPE) 60 typedef struct { 61 Elf64_Xword d_tag; /* how to interpret value */ 62 union { 63 Elf64_Xword d_val; 64 Elf64_Addr d_ptr; 65 } d_un; 66 } Elf64_Dyn; 67 #endif /* defined(_LP64) || defined(_LONGLONG_TYPE) */ 68 #endif /* _ASM */ 69 70 /* 71 * Tag values 72 */ 73 #define DT_NULL 0 /* last entry in list */ 74 #define DT_NEEDED 1 /* a needed object */ 75 #define DT_PLTRELSZ 2 /* size of relocations for the PLT */ 76 #define DT_PLTGOT 3 /* addresses used by procedure linkage table */ 77 #define DT_HASH 4 /* hash table */ 78 #define DT_STRTAB 5 /* string table */ 79 #define DT_SYMTAB 6 /* symbol table */ 80 #define DT_RELA 7 /* addr of relocation entries */ 81 #define DT_RELASZ 8 /* size of relocation table */ 82 #define DT_RELAENT 9 /* base size of relocation entry */ 83 #define DT_STRSZ 10 /* size of string table */ 84 #define DT_SYMENT 11 /* size of symbol table entry */ 85 #define DT_INIT 12 /* _init addr */ 86 #define DT_FINI 13 /* _fini addr */ 87 #define DT_SONAME 14 /* name of this shared object */ 88 #define DT_RPATH 15 /* run-time search path */ 89 #define DT_SYMBOLIC 16 /* shared object linked -Bsymbolic */ 90 #define DT_REL 17 /* addr of relocation entries */ 91 #define DT_RELSZ 18 /* size of relocation table */ 92 #define DT_RELENT 19 /* base size of relocation entry */ 93 #define DT_PLTREL 20 /* relocation type for PLT entry */ 94 #define DT_DEBUG 21 /* pointer to r_debug structure */ 95 #define DT_TEXTREL 22 /* text relocations remain for this object */ 96 #define DT_JMPREL 23 /* pointer to the PLT relocation entries */ 97 #define DT_BIND_NOW 24 /* perform all relocations at load of object */ 98 #define DT_INIT_ARRAY 25 /* pointer to .initarray */ 99 #define DT_FINI_ARRAY 26 /* pointer to .finiarray */ 100 #define DT_INIT_ARRAYSZ 27 /* size of .initarray */ 101 #define DT_FINI_ARRAYSZ 28 /* size of .finiarray */ 102 #define DT_RUNPATH 29 /* run-time search path */ 103 #define DT_FLAGS 30 /* state flags - see DF_* */ 104 105 /* 106 * DT_* encoding rules: The value of each dynamic tag determines the 107 * interpretation of the d_un union. This convention provides for simpler 108 * interpretation of dynamic tags by external tools. A tag whose value 109 * is an even number indicates a dynamic section entry that uses d_ptr. 110 * A tag whose value is an odd number indicates a dynamic section entry 111 * that uses d_val, or that uses neither d_ptr nor d_val. 112 * 113 * There are exceptions to the above rule: 114 * - Tags with values that are less than DT_ENCODING. 115 * - Tags with values that fall between DT_LOOS and DT_SUNW_ENCODING 116 * - Tags with values that fall between DT_HIOS and DT_LOPROC 117 * 118 * Third party tools must handle these exception ranges explicitly 119 * on an item by item basis. 120 */ 121 #define DT_ENCODING 32 /* positive tag DT_* encoding rules */ 122 /* start after this */ 123 #define DT_PREINIT_ARRAY 32 /* pointer to .preinitarray segment */ 124 #define DT_PREINIT_ARRAYSZ 33 /* size of .preinitarray segment */ 125 126 #define DT_MAXPOSTAGS 34 /* number of positive tags */ 127 128 /* 129 * DT_* encoding rules do not apply between DT_LOOS and DT_SUNW_ENCODING 130 */ 131 #define DT_LOOS 0x6000000d /* OS specific range */ 132 #define DT_SUNW_AUXILIARY 0x6000000d /* symbol auxiliary name */ 133 #define DT_SUNW_RTLDINF 0x6000000e /* ld.so.1 info (private) */ 134 #define DT_SUNW_FILTER 0x6000000f /* symbol filter name */ 135 #define DT_SUNW_CAP 0x60000010 /* hardware/software */ 136 /* capabilities */ 137 #define DT_SUNW_SYMTAB 0x60000011 /* symtab with local fcn */ 138 /* symbols immediately */ 139 /* preceding DT_SYMTAB */ 140 #define DT_SUNW_SYMSZ 0x60000012 /* Size of SUNW_SYMTAB table */ 141 142 /* 143 * DT_* encoding rules apply between DT_SUNW_ENCODING and DT_HIOS 144 */ 145 #define DT_SUNW_ENCODING 0x60000013 /* DT_* encoding rules resume */ 146 /* after this */ 147 #define DT_SUNW_SORTENT 0x60000013 /* sizeof [SYM|TLS]SORT entry */ 148 #define DT_SUNW_SYMSORT 0x60000014 /* sym indices sorted by addr */ 149 #define DT_SUNW_SYMSORTSZ 0x60000015 /* size of SUNW_SYMSORT */ 150 #define DT_SUNW_TLSSORT 0x60000016 /* tls sym ndx sort by offset */ 151 #define DT_SUNW_TLSSORTSZ 0x60000017 /* size of SUNW_TLSSORT */ 152 #define DT_SUNW_CAPINFO 0x60000018 /* capabilities symbols */ 153 #define DT_SUNW_STRPAD 0x60000019 /* # of unused bytes at the */ 154 /* end of dynstr */ 155 #define DT_SUNW_CAPCHAIN 0x6000001a /* capabilities chain info */ 156 #define DT_SUNW_LDMACH 0x6000001b /* EM_ machine code of linker */ 157 /* that produced object */ 158 #define DT_SUNW_CAPCHAINENT 0x6000001d /* capabilities chain entry */ 159 #define DT_SUNW_CAPCHAINSZ 0x6000001f /* capabilities chain size */ 160 161 /* 162 * DT_* encoding rules do not apply between DT_HIOS and DT_LOPROC 163 */ 164 #define DT_HIOS 0x6ffff000 165 166 /* 167 * The following values have been deprecated and remain here to allow 168 * compatibility with older binaries. 169 */ 170 #define DT_DEPRECATED_SPARC_REGISTER 0x7000001 171 172 /* 173 * DT_* entries which fall between DT_VALRNGHI & DT_VALRNGLO use the 174 * Dyn.d_un.d_val field of the Elf*_Dyn structure. 175 */ 176 #define DT_VALRNGLO 0x6ffffd00 177 178 #define DT_GNU_PRELINKED 0x6ffffdf5 /* prelinking timestamp (unused) */ 179 #define DT_GNU_CONFLICTSZ 0x6ffffdf6 /* size of conflict section (unused) */ 180 #define DT_GNU_LIBLISTSZ 0x6ffffdf7 /* size of library list (unused) */ 181 #define DT_CHECKSUM 0x6ffffdf8 /* elf checksum */ 182 #define DT_PLTPADSZ 0x6ffffdf9 /* pltpadding size */ 183 #define DT_MOVEENT 0x6ffffdfa /* move table entry size */ 184 #define DT_MOVESZ 0x6ffffdfb /* move table size */ 185 #define DT_FEATURE_1 0x6ffffdfc /* feature holder */ 186 #define DT_POSFLAG_1 0x6ffffdfd /* flags for DT_* entries, effecting */ 187 /* the following DT_* entry. */ 188 /* See DF_P1_* definitions */ 189 #define DT_SYMINSZ 0x6ffffdfe /* syminfo table size (in bytes) */ 190 #define DT_SYMINENT 0x6ffffdff /* syminfo entry size (in bytes) */ 191 #define DT_VALRNGHI 0x6ffffdff 192 193 /* 194 * DT_* entries which fall between DT_ADDRRNGHI & DT_ADDRRNGLO use the 195 * Dyn.d_un.d_ptr field of the Elf*_Dyn structure. 196 * 197 * If any adjustment is made to the ELF object after it has been 198 * built, these entries will need to be adjusted. 199 */ 200 #define DT_ADDRRNGLO 0x6ffffe00 201 202 #define DT_GNU_HASH 0x6ffffef5 /* GNU-style hash table (unused) */ 203 #define DT_TLSDESC_PLT 0x6ffffef6 /* GNU (unused) */ 204 #define DT_TLSDESC_GOT 0x6ffffef7 /* GNU (unused) */ 205 #define DT_GNU_CONFLICT 0x6ffffef8 /* start of conflict section (unused) */ 206 #define DT_GNU_LIBLIST 0x6ffffef9 /* Library list (unused) */ 207 208 #define DT_CONFIG 0x6ffffefa /* configuration information */ 209 #define DT_DEPAUDIT 0x6ffffefb /* dependency auditing */ 210 #define DT_AUDIT 0x6ffffefc /* object auditing */ 211 #define DT_PLTPAD 0x6ffffefd /* pltpadding (sparcv9) */ 212 #define DT_MOVETAB 0x6ffffefe /* move table */ 213 #define DT_SYMINFO 0x6ffffeff /* syminfo table */ 214 #define DT_ADDRRNGHI 0x6ffffeff 215 216 /* 217 * The following DT_* entries should have been assigned within one of the 218 * DT_* ranges, but existed before such ranges had been established. 219 */ 220 #define DT_VERSYM 0x6ffffff0 /* version symbol table - unused by */ 221 /* Solaris (see libld/update.c) */ 222 223 #define DT_RELACOUNT 0x6ffffff9 /* number of RELATIVE relocations */ 224 #define DT_RELCOUNT 0x6ffffffa /* number of RELATIVE relocations */ 225 #define DT_FLAGS_1 0x6ffffffb /* state flags - see DF_1_* defs */ 226 #define DT_VERDEF 0x6ffffffc /* version definition table and */ 227 #define DT_VERDEFNUM 0x6ffffffd /* associated no. of entries */ 228 #define DT_VERNEED 0x6ffffffe /* version needed table and */ 229 #define DT_VERNEEDNUM 0x6fffffff /* associated no. of entries */ 230 231 /* 232 * DT_* entries between DT_HIPROC and DT_LOPROC are reserved for processor 233 * specific semantics. 234 * 235 * DT_* encoding rules apply to all tag values larger than DT_LOPROC. 236 */ 237 #define DT_LOPROC 0x70000000 /* processor specific range */ 238 #define DT_AUXILIARY 0x7ffffffd /* shared library auxiliary name */ 239 #define DT_USED 0x7ffffffe /* ignored - same as needed */ 240 #define DT_FILTER 0x7fffffff /* shared library filter name */ 241 #define DT_HIPROC 0x7fffffff 242 243 244 /* 245 * Values for DT_FLAGS 246 */ 247 #define DF_ORIGIN 0x00000001 /* ORIGIN processing required */ 248 #define DF_SYMBOLIC 0x00000002 /* symbolic bindings in effect */ 249 #define DF_TEXTREL 0x00000004 /* text relocations remain */ 250 #define DF_BIND_NOW 0x00000008 /* process all relocations */ 251 #define DF_STATIC_TLS 0x00000010 /* obj. contains static TLS refs */ 252 253 /* 254 * Values for the DT_POSFLAG_1 .dynamic entry. 255 * These values only affect the following DT_* entry. 256 */ 257 #define DF_P1_LAZYLOAD 0x00000001 /* following object is to be */ 258 /* lazy loaded */ 259 #define DF_P1_GROUPPERM 0x00000002 /* following object's symbols are */ 260 /* not available for general */ 261 /* symbol bindings. */ 262 #define DF_P1_DEFERRED 0x00000004 /* following object is deferred */ 263 264 /* 265 * Values for the DT_FLAGS_1 .dynamic entry. 266 */ 267 #define DF_1_NOW 0x00000001 /* set RTLD_NOW for this object */ 268 #define DF_1_GLOBAL 0x00000002 /* set RTLD_GLOBAL for this object */ 269 #define DF_1_GROUP 0x00000004 /* set RTLD_GROUP for this object */ 270 #define DF_1_NODELETE 0x00000008 /* set RTLD_NODELETE for this object */ 271 #define DF_1_LOADFLTR 0x00000010 /* trigger filtee loading at runtime */ 272 #define DF_1_INITFIRST 0x00000020 /* set RTLD_INITFIRST for this object */ 273 #define DF_1_NOOPEN 0x00000040 /* set RTLD_NOOPEN for this object */ 274 #define DF_1_ORIGIN 0x00000080 /* ORIGIN processing required */ 275 #define DF_1_DIRECT 0x00000100 /* direct binding enabled */ 276 #define DF_1_TRANS 0x00000200 /* unused historical name */ 277 #define DF_1_INTERPOSE 0x00000400 /* object is an interposer */ 278 #define DF_1_NODEFLIB 0x00000800 /* ignore default library search path */ 279 #define DF_1_NODUMP 0x00001000 /* object can't be dldump(3x)'ed */ 280 #define DF_1_CONFALT 0x00002000 /* configuration alternative created */ 281 #define DF_1_ENDFILTEE 0x00004000 /* filtee terminates filters search */ 282 #define DF_1_DISPRELDNE 0x00008000 /* disp reloc applied at build time */ 283 #define DF_1_DISPRELPND 0x00010000 /* disp reloc applied at run-time */ 284 #define DF_1_NODIRECT 0x00020000 /* object contains symbols that */ 285 /* cannot be directly bound to */ 286 #define DF_1_IGNMULDEF 0x00040000 /* internal: krtld ignore muldefs */ 287 #define DF_1_NOKSYMS 0x00080000 /* internal: don't export object's */ 288 /* symbols via /dev/ksyms */ 289 #define DF_1_NOHDR 0x00100000 /* mapfile: 1st segment mapping */ 290 /* omits ELF & program headers */ 291 #define DF_1_EDITED 0x00200000 /* object has been modified since */ 292 /* being built by 'ld' */ 293 #define DF_1_NORELOC 0x00400000 /* internal: unrelocated object */ 294 #define DF_1_SYMINTPOSE 0x00800000 /* individual symbol interposers */ 295 /* exist */ 296 #define DF_1_GLOBAUDIT 0x01000000 /* establish global auditing */ 297 #define DF_1_SINGLETON 0x02000000 /* singleton symbols exist */ 298 299 /* 300 * Values set to DT_FEATURE_1 tag's d_val. 301 */ 302 #define DTF_1_PARINIT 0x00000001 /* partially initialization feature */ 303 #define DTF_1_CONFEXP 0x00000002 /* configuration file expected */ 304 305 306 /* 307 * Version structures. There are three types of version structure: 308 * 309 * o A definition of the versions within the image itself. 310 * Each version definition is assigned a unique index (starting from 311 * VER_NDX_BGNDEF) which is used to cross-reference symbols associated to 312 * the version. Each version can have one or more dependencies on other 313 * version definitions within the image. The version name, and any 314 * dependency names, are specified in the version definition auxiliary 315 * array. Version definition entries require a version symbol index table. 316 * 317 * o A version requirement on a needed dependency. Each needed entry 318 * specifies the shared object dependency (as specified in DT_NEEDED). 319 * One or more versions required from this dependency are specified in the 320 * version needed auxiliary array. 321 * 322 * o A version symbol index table. Each symbol indexes into this array 323 * to determine its version index. Index values of VER_NDX_BGNDEF or 324 * greater indicate the version definition to which a symbol is associated. 325 * (the size of a symbol index entry is recorded in the sh_info field). 326 */ 327 #ifndef _ASM 328 329 typedef struct { /* Version Definition Structure. */ 330 Elf32_Half vd_version; /* this structures version revision */ 331 Elf32_Half vd_flags; /* version information */ 332 Elf32_Half vd_ndx; /* version index */ 333 Elf32_Half vd_cnt; /* no. of associated aux entries */ 334 Elf32_Word vd_hash; /* version name hash value */ 335 Elf32_Word vd_aux; /* no. of bytes from start of this */ 336 /* verdef to verdaux array */ 337 Elf32_Word vd_next; /* no. of bytes from start of this */ 338 } Elf32_Verdef; /* verdef to next verdef entry */ 339 340 typedef struct { /* Verdef Auxiliary Structure. */ 341 Elf32_Word vda_name; /* first element defines the version */ 342 /* name. Additional entries */ 343 /* define dependency names. */ 344 Elf32_Word vda_next; /* no. of bytes from start of this */ 345 } Elf32_Verdaux; /* verdaux to next verdaux entry */ 346 347 348 typedef struct { /* Version Requirement Structure. */ 349 Elf32_Half vn_version; /* this structures version revision */ 350 Elf32_Half vn_cnt; /* no. of associated aux entries */ 351 Elf32_Word vn_file; /* name of needed dependency (file) */ 352 Elf32_Word vn_aux; /* no. of bytes from start of this */ 353 /* verneed to vernaux array */ 354 Elf32_Word vn_next; /* no. of bytes from start of this */ 355 } Elf32_Verneed; /* verneed to next verneed entry */ 356 357 typedef struct { /* Verneed Auxiliary Structure. */ 358 Elf32_Word vna_hash; /* version name hash value */ 359 Elf32_Half vna_flags; /* version information */ 360 Elf32_Half vna_other; 361 Elf32_Word vna_name; /* version name */ 362 Elf32_Word vna_next; /* no. of bytes from start of this */ 363 } Elf32_Vernaux; /* vernaux to next vernaux entry */ 364 365 typedef Elf32_Half Elf32_Versym; /* Version symbol index array */ 366 367 typedef struct { 368 Elf32_Half si_boundto; /* direct bindings - symbol bound to */ 369 Elf32_Half si_flags; /* per symbol flags */ 370 } Elf32_Syminfo; 371 372 373 #if defined(_LP64) || defined(_LONGLONG_TYPE) 374 typedef struct { 375 Elf64_Half vd_version; /* this structures version revision */ 376 Elf64_Half vd_flags; /* version information */ 377 Elf64_Half vd_ndx; /* version index */ 378 Elf64_Half vd_cnt; /* no. of associated aux entries */ 379 Elf64_Word vd_hash; /* version name hash value */ 380 Elf64_Word vd_aux; /* no. of bytes from start of this */ 381 /* verdef to verdaux array */ 382 Elf64_Word vd_next; /* no. of bytes from start of this */ 383 } Elf64_Verdef; /* verdef to next verdef entry */ 384 385 typedef struct { 386 Elf64_Word vda_name; /* first element defines the version */ 387 /* name. Additional entries */ 388 /* define dependency names. */ 389 Elf64_Word vda_next; /* no. of bytes from start of this */ 390 } Elf64_Verdaux; /* verdaux to next verdaux entry */ 391 392 typedef struct { 393 Elf64_Half vn_version; /* this structures version revision */ 394 Elf64_Half vn_cnt; /* no. of associated aux entries */ 395 Elf64_Word vn_file; /* name of needed dependency (file) */ 396 Elf64_Word vn_aux; /* no. of bytes from start of this */ 397 /* verneed to vernaux array */ 398 Elf64_Word vn_next; /* no. of bytes from start of this */ 399 } Elf64_Verneed; /* verneed to next verneed entry */ 400 401 typedef struct { 402 Elf64_Word vna_hash; /* version name hash value */ 403 Elf64_Half vna_flags; /* version information */ 404 Elf64_Half vna_other; 405 Elf64_Word vna_name; /* version name */ 406 Elf64_Word vna_next; /* no. of bytes from start of this */ 407 } Elf64_Vernaux; /* vernaux to next vernaux entry */ 408 409 typedef Elf64_Half Elf64_Versym; 410 411 typedef struct { 412 Elf64_Half si_boundto; /* direct bindings - symbol bound to */ 413 Elf64_Half si_flags; /* per symbol flags */ 414 } Elf64_Syminfo; 415 #endif /* defined(_LP64) || defined(_LONGLONG_TYPE) */ 416 417 #endif /* _ASM */ 418 419 /* 420 * Versym symbol index values. Values greater than VER_NDX_GLOBAL 421 * and less then VER_NDX_LORESERVE associate symbols with user 422 * specified version descriptors. 423 */ 424 #define VER_NDX_LOCAL 0 /* symbol is local */ 425 #define VER_NDX_GLOBAL 1 /* symbol is global and assigned to */ 426 /* the base version */ 427 #define VER_NDX_LORESERVE 0xff00 /* beginning of RESERVED entries */ 428 #define VER_NDX_ELIMINATE 0xff01 /* symbol is to be eliminated */ 429 430 /* 431 * Verdef (vd_flags) and Vernaux (vna_flags) flags values. 432 */ 433 #define VER_FLG_BASE 0x1 /* version definition of file itself */ 434 /* (Verdef only) */ 435 #define VER_FLG_WEAK 0x2 /* weak version identifier */ 436 #define VER_FLG_INFO 0x4 /* version is recorded in object for */ 437 /* informational purposes */ 438 /* (Versym reference) only. No */ 439 /* runtime verification is */ 440 /* required. (Vernaux only) */ 441 442 /* 443 * Verdef version values. 444 */ 445 #define VER_DEF_NONE 0 /* Ver_def version */ 446 #define VER_DEF_CURRENT 1 447 #define VER_DEF_NUM 2 448 449 /* 450 * Verneed version values. 451 */ 452 #define VER_NEED_NONE 0 /* Ver_need version */ 453 #define VER_NEED_CURRENT 1 454 #define VER_NEED_NUM 2 455 456 457 /* 458 * Syminfo flag values 459 */ 460 #define SYMINFO_FLG_DIRECT 0x0001 /* symbol ref has direct association */ 461 /* to object containing defn. */ 462 #define SYMINFO_FLG_FILTER 0x0002 /* symbol ref is associated to a */ 463 /* standard filter */ 464 #define SYMINFO_FLG_PASSTHRU SYMINFO_FLG_FILTER /* unused historical name */ 465 #define SYMINFO_FLG_COPY 0x0004 /* symbol is a copy-reloc */ 466 #define SYMINFO_FLG_LAZYLOAD 0x0008 /* object containing defn. should be */ 467 /* lazily-loaded */ 468 #define SYMINFO_FLG_DIRECTBIND 0x0010 /* ref should be bound directly to */ 469 /* object containing defn. */ 470 #define SYMINFO_FLG_NOEXTDIRECT 0x0020 /* don't let an external reference */ 471 /* directly bind to this symbol */ 472 #define SYMINFO_FLG_AUXILIARY 0x0040 /* symbol ref is associated to a */ 473 /* auxiliary filter */ 474 #define SYMINFO_FLG_INTERPOSE 0x0080 /* symbol defines an interposer */ 475 #define SYMINFO_FLG_CAP 0x0100 /* symbol is capabilities specific */ 476 #define SYMINFO_FLG_DEFERRED 0x0200 /* symbol should not be included in */ 477 /* BIND_NOW relocations */ 478 479 /* 480 * Syminfo.si_boundto values. 481 */ 482 #define SYMINFO_BT_SELF 0xffff /* symbol bound to self */ 483 #define SYMINFO_BT_PARENT 0xfffe /* symbol bound to parent */ 484 #define SYMINFO_BT_NONE 0xfffd /* no special symbol binding */ 485 #define SYMINFO_BT_EXTERN 0xfffc /* symbol defined as external */ 486 #define SYMINFO_BT_LOWRESERVE 0xff00 /* beginning of reserved entries */ 487 488 /* 489 * Syminfo version values. 490 */ 491 #define SYMINFO_NONE 0 /* Syminfo version */ 492 #define SYMINFO_CURRENT 1 493 #define SYMINFO_NUM 2 494 495 496 /* 497 * Public structure defined and maintained within the runtime linker 498 */ 499 #ifndef _ASM 500 501 typedef struct link_map Link_map; 502 503 struct link_map { 504 unsigned long l_addr; /* address at which object is mapped */ 505 char *l_name; /* full name of loaded object */ 506 #ifdef _LP64 507 Elf64_Dyn *l_ld; /* dynamic structure of object */ 508 #else 509 Elf32_Dyn *l_ld; /* dynamic structure of object */ 510 #endif 511 Link_map *l_next; /* next link object */ 512 Link_map *l_prev; /* previous link object */ 513 char *l_refname; /* filters reference name */ 514 }; 515 516 #ifdef _SYSCALL32 517 typedef struct link_map32 Link_map32; 518 519 struct link_map32 { 520 Elf32_Word l_addr; 521 Elf32_Addr l_name; 522 Elf32_Addr l_ld; 523 Elf32_Addr l_next; 524 Elf32_Addr l_prev; 525 Elf32_Addr l_refname; 526 }; 527 #endif 528 529 typedef enum { 530 RT_CONSISTENT, 531 RT_ADD, 532 RT_DELETE 533 } r_state_e; 534 535 typedef enum { 536 RD_FL_NONE = 0, /* no flags */ 537 RD_FL_ODBG = (1<<0), /* old style debugger present */ 538 RD_FL_DBG = (1<<1) /* debugging enabled */ 539 } rd_flags_e; 540 541 542 543 /* 544 * Debugging events enabled inside of the runtime linker. To 545 * access these events see the librtld_db interface. 546 */ 547 typedef enum { 548 RD_NONE = 0, /* no event */ 549 RD_PREINIT, /* the Initial rendezvous before .init */ 550 RD_POSTINIT, /* the Second rendezvous after .init */ 551 RD_DLACTIVITY /* a dlopen or dlclose has happened */ 552 } rd_event_e; 553 554 struct r_debug { 555 int r_version; /* debugging info version no. */ 556 Link_map *r_map; /* address of link_map */ 557 unsigned long r_brk; /* address of update routine */ 558 r_state_e r_state; 559 unsigned long r_ldbase; /* base addr of ld.so */ 560 Link_map *r_ldsomap; /* address of ld.so.1's link map */ 561 rd_event_e r_rdevent; /* debug event */ 562 rd_flags_e r_flags; /* misc flags. */ 563 }; 564 565 #ifdef _SYSCALL32 566 struct r_debug32 { 567 Elf32_Word r_version; /* debugging info version no. */ 568 Elf32_Addr r_map; /* address of link_map */ 569 Elf32_Word r_brk; /* address of update routine */ 570 r_state_e r_state; 571 Elf32_Word r_ldbase; /* base addr of ld.so */ 572 Elf32_Addr r_ldsomap; /* address of ld.so.1's link map */ 573 rd_event_e r_rdevent; /* debug event */ 574 rd_flags_e r_flags; /* misc flags. */ 575 }; 576 #endif 577 578 579 #define R_DEBUG_VERSION 2 /* current r_debug version */ 580 #endif /* _ASM */ 581 582 /* 583 * Attribute/value structures used to bootstrap ELF-based dynamic linker. 584 */ 585 #ifndef _ASM 586 typedef struct { 587 Elf32_Sword eb_tag; /* what this one is */ 588 union { /* possible values */ 589 Elf32_Word eb_val; 590 Elf32_Addr eb_ptr; 591 Elf32_Off eb_off; 592 } eb_un; 593 } Elf32_Boot; 594 595 #if defined(_LP64) || defined(_LONGLONG_TYPE) 596 typedef struct { 597 Elf64_Xword eb_tag; /* what this one is */ 598 union { /* possible values */ 599 Elf64_Xword eb_val; 600 Elf64_Addr eb_ptr; 601 Elf64_Off eb_off; 602 } eb_un; 603 } Elf64_Boot; 604 #endif /* defined(_LP64) || defined(_LONGLONG_TYPE) */ 605 #endif /* _ASM */ 606 607 /* 608 * Attributes 609 */ 610 #define EB_NULL 0 /* (void) last entry */ 611 #define EB_DYNAMIC 1 /* (*) dynamic structure of subject */ 612 #define EB_LDSO_BASE 2 /* (caddr_t) base address of ld.so */ 613 #define EB_ARGV 3 /* (caddr_t) argument vector */ 614 #define EB_ENVP 4 /* (char **) environment strings */ 615 #define EB_AUXV 5 /* (auxv_t *) auxiliary vector */ 616 #define EB_DEVZERO 6 /* (int) fd for /dev/zero */ 617 #define EB_PAGESIZE 7 /* (int) page size */ 618 #define EB_MAX 8 /* number of "EBs" */ 619 #define EB_MAX_SIZE32 64 /* size in bytes, _ILP32 */ 620 #define EB_MAX_SIZE64 128 /* size in bytes, _LP64 */ 621 622 623 #ifndef _ASM 624 625 #ifdef __STDC__ 626 627 /* 628 * Concurrency communication structure for libc callbacks. 629 */ 630 extern void _ld_libc(void *); 631 #else /* __STDC__ */ 632 extern void _ld_libc(); 633 #endif /* __STDC__ */ 634 635 #pragma unknown_control_flow(_ld_libc) 636 #endif /* _ASM */ 637 638 #ifdef __cplusplus 639 } 640 #endif 641 642 #endif /* _SYS_LINK_H */ 643