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