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