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 2008 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 "@(#)link.h 1.80 08/03/18 SMI" 34 35#ifndef _ASM 36#include <sys/types.h> 37 38#if !defined(__APPLE__) 39#include <sys/elftypes.h> 40#else /* is Apple Mac OS X */ 41#include "elftypes.h" /* In lieu of Solaris <sys/types.h> */ 42#endif /* __APPLE__ */ 43 44#endif 45 46#ifdef __cplusplus 47extern "C" { 48#endif 49 50/* 51 * Communication structures for the runtime linker. 52 */ 53 54/* 55 * The following data structure provides a self-identifying union consisting 56 * of a tag from a known list and a value. 57 */ 58#ifndef _ASM 59typedef struct { 60 Elf32_Sword d_tag; /* how to interpret value */ 61 union { 62 Elf32_Word d_val; 63 Elf32_Addr d_ptr; 64 Elf32_Off d_off; 65 } d_un; 66} Elf32_Dyn; 67 68#if defined(_LP64) || defined(_LONGLONG_TYPE) 69typedef struct { 70 Elf64_Xword d_tag; /* how to interpret value */ 71 union { 72 Elf64_Xword d_val; 73 Elf64_Addr d_ptr; 74 } d_un; 75} Elf64_Dyn; 76#endif /* defined(_LP64) || defined(_LONGLONG_TYPE) */ 77#endif /* _ASM */ 78 79/* 80 * Tag values 81 */ 82#define DT_NULL 0 /* last entry in list */ 83#define DT_NEEDED 1 /* a needed object */ 84#define DT_PLTRELSZ 2 /* size of relocations for the PLT */ 85#define DT_PLTGOT 3 /* addresses used by procedure linkage table */ 86#define DT_HASH 4 /* hash table */ 87#define DT_STRTAB 5 /* string table */ 88#define DT_SYMTAB 6 /* symbol table */ 89#define DT_RELA 7 /* addr of relocation entries */ 90#define DT_RELASZ 8 /* size of relocation table */ 91#define DT_RELAENT 9 /* base size of relocation entry */ 92#define DT_STRSZ 10 /* size of string table */ 93#define DT_SYMENT 11 /* size of symbol table entry */ 94#define DT_INIT 12 /* _init addr */ 95#define DT_FINI 13 /* _fini addr */ 96#define DT_SONAME 14 /* name of this shared object */ 97#define DT_RPATH 15 /* run-time search path */ 98#define DT_SYMBOLIC 16 /* shared object linked -Bsymbolic */ 99#define DT_REL 17 /* addr of relocation entries */ 100#define DT_RELSZ 18 /* size of relocation table */ 101#define DT_RELENT 19 /* base size of relocation entry */ 102#define DT_PLTREL 20 /* relocation type for PLT entry */ 103#define DT_DEBUG 21 /* pointer to r_debug structure */ 104#define DT_TEXTREL 22 /* text relocations remain for this object */ 105#define DT_JMPREL 23 /* pointer to the PLT relocation entries */ 106#define DT_BIND_NOW 24 /* perform all relocations at load of object */ 107#define DT_INIT_ARRAY 25 /* pointer to .initarray */ 108#define DT_FINI_ARRAY 26 /* pointer to .finiarray */ 109#define DT_INIT_ARRAYSZ 27 /* size of .initarray */ 110#define DT_FINI_ARRAYSZ 28 /* size of .finiarray */ 111#define DT_RUNPATH 29 /* run-time search path */ 112#define DT_FLAGS 30 /* state flags - see DF_* */ 113 114/* 115 * DT_* encoding rules: The value of each dynamic tag determines the 116 * interpretation of the d_un union. This convention provides for simpler 117 * interpretation of dynamic tags by external tools. A tag whose value 118 * is an even number indicates a dynamic section entry that uses d_ptr. 119 * A tag whose value is an odd number indicates a dynamic section entry 120 * that uses d_val, or that uses neither d_ptr nor d_val. 121 * 122 * There are exceptions to the above rule: 123 * - Tags with values that are less than DT_ENCODING. 124 * - Tags with values that fall between DT_LOOS and DT_SUNW_ENCODING 125 * - Tags with values that fall between DT_HIOS and DT_LOPROC 126 * 127 * Third party tools must handle these exception ranges explicitly 128 * on an item by item basis. 129 */ 130#define DT_ENCODING 32 /* positive tag DT_* encoding rules */ 131 /* start after this */ 132#define DT_PREINIT_ARRAY 32 /* pointer to .preinitarray segment */ 133#define DT_PREINIT_ARRAYSZ 33 /* size of .preinitarray segment */ 134 135#define DT_MAXPOSTAGS 34 /* number of positive tags */ 136 137/* 138 * DT_* encoding rules do not apply between DT_LOOS and DT_SUNW_ENCODING 139 */ 140#define DT_LOOS 0x6000000d /* OS specific range */ 141#define DT_SUNW_AUXILIARY 0x6000000d /* symbol auxiliary name */ 142#define DT_SUNW_RTLDINF 0x6000000e /* ld.so.1 info (private) */ 143#define DT_SUNW_FILTER 0x6000000f /* symbol filter name */ 144#define DT_SUNW_CAP 0x60000010 /* hardware/software */ 145 /* capabilities */ 146#define DT_SUNW_SYMTAB 0x60000011 /* symtab with local fcn */ 147 /* symbols immediately */ 148 /* preceding DT_SYMTAB */ 149#define DT_SUNW_SYMSZ 0x60000012 /* Size of SUNW_SYMTAB table */ 150 151/* 152 * DT_* encoding rules apply between DT_SUNW_ENCODING and DT_HIOS 153 */ 154#define DT_SUNW_ENCODING 0x60000013 /* DT_* encoding rules resume */ 155 /* after this */ 156#define DT_SUNW_SORTENT 0x60000013 /* sizeof [SYM|TLS]SORT entrt */ 157#define DT_SUNW_SYMSORT 0x60000014 /* sym indices sorted by addr */ 158#define DT_SUNW_SYMSORTSZ 0x60000015 /* size of SUNW_SYMSORT */ 159#define DT_SUNW_TLSSORT 0x60000016 /* tls sym ndx sort by offset */ 160#define DT_SUNW_TLSSORTSZ 0x60000017 /* size of SUNW_TLSSORT */ 161 162#define DT_SUNW_STRPAD 0x60000019 /* # of unused bytes at the */ 163 /* end of dynstr */ 164#define DT_SUNW_LDMACH 0x6000001b /* EM_ machine code of linker */ 165 /* that produced object */ 166 167/* 168 * DT_* encoding rules do not apply between DT_HIOS and DT_LOPROC 169 */ 170#define DT_HIOS 0x6ffff000 171 172/* 173 * The following values have been deprecated and remain here to allow 174 * compatibility with older binaries. 175 */ 176#define DT_DEPRECATED_SPARC_REGISTER 0x7000001 177 178/* 179 * DT_* entries which fall between DT_VALRNGHI & DT_VALRNGLO use the 180 * Dyn.d_un.d_val field of the Elf*_Dyn structure. 181 */ 182#define DT_VALRNGLO 0x6ffffd00 183#define DT_CHECKSUM 0x6ffffdf8 /* elf checksum */ 184#define DT_PLTPADSZ 0x6ffffdf9 /* pltpadding size */ 185#define DT_MOVEENT 0x6ffffdfa /* move table entry size */ 186#define DT_MOVESZ 0x6ffffdfb /* move table size */ 187#define DT_FEATURE_1 0x6ffffdfc /* feature holder */ 188#define DT_POSFLAG_1 0x6ffffdfd /* flags for DT_* entries, effecting */ 189 /* the following DT_* entry. */ 190 /* See DF_P1_* definitions */ 191#define DT_SYMINSZ 0x6ffffdfe /* syminfo table size (in bytes) */ 192#define DT_SYMINENT 0x6ffffdff /* syminfo entry size (in bytes) */ 193#define DT_VALRNGHI 0x6ffffdff 194 195/* 196 * DT_* entries which fall between DT_ADDRRNGHI & DT_ADDRRNGLO use the 197 * Dyn.d_un.d_ptr field of the Elf*_Dyn structure. 198 * 199 * If any adjustment is made to the ELF object after it has been 200 * built, these entries will need to be adjusted. 201 */ 202#define DT_ADDRRNGLO 0x6ffffe00 203#define DT_CONFIG 0x6ffffefa /* configuration information */ 204#define DT_DEPAUDIT 0x6ffffefb /* dependency auditing */ 205#define DT_AUDIT 0x6ffffefc /* object auditing */ 206#define DT_PLTPAD 0x6ffffefd /* pltpadding (sparcv9) */ 207#define DT_MOVETAB 0x6ffffefe /* move table */ 208#define DT_SYMINFO 0x6ffffeff /* syminfo table */ 209#define DT_ADDRRNGHI 0x6ffffeff 210 211/* 212 * The following DT_* entries should have been assigned within one of the 213 * DT_* ranges, but existed before such ranges had been established. 214 */ 215#define DT_VERSYM 0x6ffffff0 /* version symbol table - unused by */ 216 /* Solaris (see libld/update.c) */ 217 218#define DT_RELACOUNT 0x6ffffff9 /* number of RELATIVE relocations */ 219#define DT_RELCOUNT 0x6ffffffa /* number of RELATIVE relocations */ 220#define DT_FLAGS_1 0x6ffffffb /* state flags - see DF_1_* defs */ 221#define DT_VERDEF 0x6ffffffc /* version definition table and */ 222#define DT_VERDEFNUM 0x6ffffffd /* associated no. of entries */ 223#define DT_VERNEED 0x6ffffffe /* version needed table and */ 224#define DT_VERNEEDNUM 0x6fffffff /* associated no. of entries */ 225 226/* 227 * DT_* entries between DT_HIPROC and DT_LOPROC are reserved for processor 228 * specific semantics. 229 * 230 * DT_* encoding rules apply to all tag values larger than DT_LOPROC. 231 */ 232#define DT_LOPROC 0x70000000 /* processor specific range */ 233#define DT_AUXILIARY 0x7ffffffd /* shared library auxiliary name */ 234#define DT_USED 0x7ffffffe /* ignored - same as needed */ 235#define DT_FILTER 0x7fffffff /* shared library filter name */ 236#define DT_HIPROC 0x7fffffff 237 238 239/* 240 * Values for DT_FLAGS 241 */ 242#define DF_ORIGIN 0x00000001 /* ORIGIN processing required */ 243#define DF_SYMBOLIC 0x00000002 /* symbolic bindings in effect */ 244#define DF_TEXTREL 0x00000004 /* text relocations remain */ 245#define DF_BIND_NOW 0x00000008 /* process all relocations */ 246#define DF_STATIC_TLS 0x00000010 /* obj. contains static TLS refs */ 247 248/* 249 * Values for the DT_POSFLAG_1 .dynamic entry. 250 * These values only affect the following DT_* entry. 251 */ 252#define DF_P1_LAZYLOAD 0x00000001 /* following object is to be */ 253 /* lazy loaded */ 254#define DF_P1_GROUPPERM 0x00000002 /* following object's symbols are */ 255 /* not available for general */ 256 /* symbol bindings. */ 257/* 258 * Values for the DT_FLAGS_1 .dynamic entry. 259 */ 260#define DF_1_NOW 0x00000001 /* set RTLD_NOW for this object */ 261#define DF_1_GLOBAL 0x00000002 /* set RTLD_GLOBAL for this object */ 262#define DF_1_GROUP 0x00000004 /* set RTLD_GROUP for this object */ 263#define DF_1_NODELETE 0x00000008 /* set RTLD_NODELETE for this object */ 264#define DF_1_LOADFLTR 0x00000010 /* trigger filtee loading at runtime */ 265#define DF_1_INITFIRST 0x00000020 /* set RTLD_INITFIRST for this object */ 266#define DF_1_NOOPEN 0x00000040 /* set RTLD_NOOPEN for this object */ 267#define DF_1_ORIGIN 0x00000080 /* ORIGIN processing required */ 268#define DF_1_DIRECT 0x00000100 /* direct binding enabled */ 269#define DF_1_TRANS 0x00000200 270#define DF_1_INTERPOSE 0x00000400 /* object is an interposer */ 271#define DF_1_NODEFLIB 0x00000800 /* ignore default library search path */ 272#define DF_1_NODUMP 0x00001000 /* object can't be dldump(3x)'ed */ 273#define DF_1_CONFALT 0x00002000 /* configuration alternative created */ 274#define DF_1_ENDFILTEE 0x00004000 /* filtee terminates filters search */ 275#define DF_1_DISPRELDNE 0x00008000 /* disp reloc applied at build time */ 276#define DF_1_DISPRELPND 0x00010000 /* disp reloc applied at run-time */ 277#define DF_1_NODIRECT 0x00020000 /* object contains symbols that */ 278 /* cannot be directly bound to */ 279#define DF_1_IGNMULDEF 0x00040000 /* internal: krtld ignore muldefs */ 280#define DF_1_NOKSYMS 0x00080000 /* internal: don't export object's */ 281 /* symbols via /dev/ksyms */ 282#define DF_1_NOHDR 0x00100000 /* mapfile ?N:1st segment mapping */ 283 /* omits ELF & program headers */ 284#define DF_1_EDITED 0x00200000 /* object has been modified since */ 285 /* being built by 'ld' */ 286#define DF_1_NORELOC 0x00400000 /* internal: unrelocated object */ 287#define DF_1_SYMINTPOSE 0x00800000 /* individual symbol interposers */ 288 /* exist */ 289#define DF_1_GLOBAUDIT 0x01000000 /* establish global auditing */ 290#define DF_1_SINGLETON 0x02000000 /* singleton symbols exist */ 291 292/* 293 * Values set to DT_FEATURE_1 tag's d_val. 294 */ 295#define DTF_1_PARINIT 0x00000001 /* partially initialization feature */ 296#define DTF_1_CONFEXP 0x00000002 /* configuration file expected */ 297 298 299/* 300 * Version structures. There are three types of version structure: 301 * 302 * o A definition of the versions within the image itself. 303 * Each version definition is assigned a unique index (starting from 304 * VER_NDX_BGNDEF) which is used to cross-reference symbols associated to 305 * the version. Each version can have one or more dependencies on other 306 * version definitions within the image. The version name, and any 307 * dependency names, are specified in the version definition auxiliary 308 * array. Version definition entries require a version symbol index table. 309 * 310 * o A version requirement on a needed dependency. Each needed entry 311 * specifies the shared object dependency (as specified in DT_NEEDED). 312 * One or more versions required from this dependency are specified in the 313 * version needed auxiliary array. 314 * 315 * o A version symbol index table. Each symbol indexes into this array 316 * to determine its version index. Index values of VER_NDX_BGNDEF or 317 * greater indicate the version definition to which a symbol is associated. 318 * (the size of a symbol index entry is recorded in the sh_info field). 319 */ 320#ifndef _ASM 321 322typedef struct { /* Version Definition Structure. */ 323 Elf32_Half vd_version; /* this structures version revision */ 324 Elf32_Half vd_flags; /* version information */ 325 Elf32_Half vd_ndx; /* version index */ 326 Elf32_Half vd_cnt; /* no. of associated aux entries */ 327 Elf32_Word vd_hash; /* version name hash value */ 328 Elf32_Word vd_aux; /* no. of bytes from start of this */ 329 /* verdef to verdaux array */ 330 Elf32_Word vd_next; /* no. of bytes from start of this */ 331} Elf32_Verdef; /* verdef to next verdef entry */ 332 333typedef struct { /* Verdef Auxiliary Structure. */ 334 Elf32_Word vda_name; /* first element defines the version */ 335 /* name. Additional entries */ 336 /* define dependency names. */ 337 Elf32_Word vda_next; /* no. of bytes from start of this */ 338} Elf32_Verdaux; /* verdaux to next verdaux entry */ 339 340 341typedef struct { /* Version Requirement Structure. */ 342 Elf32_Half vn_version; /* this structures version revision */ 343 Elf32_Half vn_cnt; /* no. of associated aux entries */ 344 Elf32_Word vn_file; /* name of needed dependency (file) */ 345 Elf32_Word vn_aux; /* no. of bytes from start of this */ 346 /* verneed to vernaux array */ 347 Elf32_Word vn_next; /* no. of bytes from start of this */ 348} Elf32_Verneed; /* verneed to next verneed entry */ 349 350typedef struct { /* Verneed Auxiliary Structure. */ 351 Elf32_Word vna_hash; /* version name hash value */ 352 Elf32_Half vna_flags; /* version information */ 353 Elf32_Half vna_other; 354 Elf32_Word vna_name; /* version name */ 355 Elf32_Word vna_next; /* no. of bytes from start of this */ 356} Elf32_Vernaux; /* vernaux to next vernaux entry */ 357 358typedef Elf32_Half Elf32_Versym; /* Version symbol index array */ 359 360typedef struct { 361 Elf32_Half si_boundto; /* direct bindings - symbol bound to */ 362 Elf32_Half si_flags; /* per symbol flags */ 363} Elf32_Syminfo; 364 365 366#if defined(_LP64) || defined(_LONGLONG_TYPE) 367typedef struct { 368 Elf64_Half vd_version; /* this structures version revision */ 369 Elf64_Half vd_flags; /* version information */ 370 Elf64_Half vd_ndx; /* version index */ 371 Elf64_Half vd_cnt; /* no. of associated aux entries */ 372 Elf64_Word vd_hash; /* version name hash value */ 373 Elf64_Word vd_aux; /* no. of bytes from start of this */ 374 /* verdef to verdaux array */ 375 Elf64_Word vd_next; /* no. of bytes from start of this */ 376} Elf64_Verdef; /* verdef to next verdef entry */ 377 378typedef struct { 379 Elf64_Word vda_name; /* first element defines the version */ 380 /* name. Additional entries */ 381 /* define dependency names. */ 382 Elf64_Word vda_next; /* no. of bytes from start of this */ 383} Elf64_Verdaux; /* verdaux to next verdaux entry */ 384 385typedef struct { 386 Elf64_Half vn_version; /* this structures version revision */ 387 Elf64_Half vn_cnt; /* no. of associated aux entries */ 388 Elf64_Word vn_file; /* name of needed dependency (file) */ 389 Elf64_Word vn_aux; /* no. of bytes from start of this */ 390 /* verneed to vernaux array */ 391 Elf64_Word vn_next; /* no. of bytes from start of this */ 392} Elf64_Verneed; /* verneed to next verneed entry */ 393 394typedef struct { 395 Elf64_Word vna_hash; /* version name hash value */ 396 Elf64_Half vna_flags; /* version information */ 397 Elf64_Half vna_other; 398 Elf64_Word vna_name; /* version name */ 399 Elf64_Word vna_next; /* no. of bytes from start of this */ 400} Elf64_Vernaux; /* vernaux to next vernaux entry */ 401 402typedef Elf64_Half Elf64_Versym; 403 404typedef struct { 405 Elf64_Half si_boundto; /* direct bindings - symbol bound to */ 406 Elf64_Half si_flags; /* per symbol flags */ 407} Elf64_Syminfo; 408#endif /* defined(_LP64) || defined(_LONGLONG_TYPE) */ 409 410#endif /* _ASM */ 411 412/* 413 * Versym symbol index values. Values greater than VER_NDX_GLOBAL 414 * and less then VER_NDX_LORESERVE associate symbols with user 415 * specified version descriptors. 416 */ 417#define VER_NDX_LOCAL 0 /* symbol is local */ 418#define VER_NDX_GLOBAL 1 /* symbol is global and assigned to */ 419 /* the base version */ 420#define VER_NDX_LORESERVE 0xff00 /* beginning of RESERVED entries */ 421#define VER_NDX_ELIMINATE 0xff01 /* symbol is to be eliminated */ 422 423/* 424 * Verdef and Verneed (via Veraux) flags values. 425 */ 426#define VER_FLG_BASE 0x1 /* version definition of file itself */ 427#define VER_FLG_WEAK 0x2 /* weak version identifier */ 428 429/* 430 * Verdef version values. 431 */ 432#define VER_DEF_NONE 0 /* Ver_def version */ 433#define VER_DEF_CURRENT 1 434#define VER_DEF_NUM 2 435 436/* 437 * Verneed version values. 438 */ 439#define VER_NEED_NONE 0 /* Ver_need version */ 440#define VER_NEED_CURRENT 1 441#define VER_NEED_NUM 2 442 443 444/* 445 * Syminfo flag values 446 */ 447#define SYMINFO_FLG_DIRECT 0x0001 /* symbol ref has direct association */ 448 /* to object containing defn. */ 449#define SYMINFO_FLG_PASSTHRU 0x0002 /* ignored - see SYMINFO_FLG_FILTER */ 450#define SYMINFO_FLG_COPY 0x0004 /* symbol is a copy-reloc */ 451#define SYMINFO_FLG_LAZYLOAD 0x0008 /* object containing defn. should be */ 452 /* lazily-loaded */ 453#define SYMINFO_FLG_DIRECTBIND 0x0010 /* ref should be bound directly to */ 454 /* object containing defn. */ 455#define SYMINFO_FLG_NOEXTDIRECT 0x0020 /* don't let an external reference */ 456 /* directly bind to this symbol */ 457#define SYMINFO_FLG_FILTER 0x0002 /* symbol ref is associated to a */ 458#define SYMINFO_FLG_AUXILIARY 0x0040 /* standard or auxiliary filter */ 459#define SYMINFO_FLG_INTERPOSE 0x0080 /* symbol defines an interposer */ 460 461/* 462 * Syminfo.si_boundto values. 463 */ 464#define SYMINFO_BT_SELF 0xffff /* symbol bound to self */ 465#define SYMINFO_BT_PARENT 0xfffe /* symbol bound to parent */ 466#define SYMINFO_BT_NONE 0xfffd /* no special symbol binding */ 467#define SYMINFO_BT_EXTERN 0xfffc /* symbol defined as external */ 468#define SYMINFO_BT_LOWRESERVE 0xff00 /* beginning of reserved entries */ 469 470/* 471 * Syminfo version values. 472 */ 473#define SYMINFO_NONE 0 /* Syminfo version */ 474#define SYMINFO_CURRENT 1 475#define SYMINFO_NUM 2 476 477 478/* 479 * Public structure defined and maintained within the runtime linker 480 */ 481#ifndef _ASM 482 483typedef struct link_map Link_map; 484 485struct link_map { 486 unsigned long l_addr; /* address at which object is mapped */ 487 char *l_name; /* full name of loaded object */ 488#ifdef _LP64 489 Elf64_Dyn *l_ld; /* dynamic structure of object */ 490#else 491 Elf32_Dyn *l_ld; /* dynamic structure of object */ 492#endif 493 Link_map *l_next; /* next link object */ 494 Link_map *l_prev; /* previous link object */ 495 char *l_refname; /* filters reference name */ 496}; 497 498#ifdef _SYSCALL32 499typedef struct link_map32 Link_map32; 500 501struct link_map32 { 502 Elf32_Word l_addr; 503 Elf32_Addr l_name; 504 Elf32_Addr l_ld; 505 Elf32_Addr l_next; 506 Elf32_Addr l_prev; 507 Elf32_Addr l_refname; 508}; 509#endif 510 511typedef enum { 512 RT_CONSISTENT, 513 RT_ADD, 514 RT_DELETE 515} r_state_e; 516 517typedef enum { 518 RD_FL_NONE = 0, /* no flags */ 519 RD_FL_ODBG = (1<<0), /* old style debugger present */ 520 RD_FL_DBG = (1<<1) /* debugging enabled */ 521} rd_flags_e; 522 523 524 525/* 526 * Debugging events enabled inside of the runtime linker. To 527 * access these events see the librtld_db interface. 528 */ 529typedef enum { 530 RD_NONE = 0, /* no event */ 531 RD_PREINIT, /* the Initial rendezvous before .init */ 532 RD_POSTINIT, /* the Second rendezvous after .init */ 533 RD_DLACTIVITY, /* a dlopen or dlclose has happened */ 534#if defined(__APPLE__) 535 RD_DYLD_LOST, /* communication with target dyld was lost */ 536 RD_DYLD_EXIT /* target exited. */ 537#endif 538} rd_event_e; 539 540struct r_debug { 541 int r_version; /* debugging info version no. */ 542 Link_map *r_map; /* address of link_map */ 543 unsigned long r_brk; /* address of update routine */ 544 r_state_e r_state; 545 unsigned long r_ldbase; /* base addr of ld.so */ 546 Link_map *r_ldsomap; /* address of ld.so.1's link map */ 547 rd_event_e r_rdevent; /* debug event */ 548 rd_flags_e r_flags; /* misc flags. */ 549}; 550 551#ifdef _SYSCALL32 552struct r_debug32 { 553 Elf32_Word r_version; /* debugging info version no. */ 554 Elf32_Addr r_map; /* address of link_map */ 555 Elf32_Word r_brk; /* address of update routine */ 556 r_state_e r_state; 557 Elf32_Word r_ldbase; /* base addr of ld.so */ 558 Elf32_Addr r_ldsomap; /* address of ld.so.1's link map */ 559 rd_event_e r_rdevent; /* debug event */ 560 rd_flags_e r_flags; /* misc flags. */ 561}; 562#endif 563 564 565#define R_DEBUG_VERSION 2 /* current r_debug version */ 566#endif /* _ASM */ 567 568/* 569 * Attribute/value structures used to bootstrap ELF-based dynamic linker. 570 */ 571#ifndef _ASM 572typedef struct { 573 Elf32_Sword eb_tag; /* what this one is */ 574 union { /* possible values */ 575 Elf32_Word eb_val; 576 Elf32_Addr eb_ptr; 577 Elf32_Off eb_off; 578 } eb_un; 579} Elf32_Boot; 580 581#if defined(_LP64) || defined(_LONGLONG_TYPE) 582typedef struct { 583 Elf64_Xword eb_tag; /* what this one is */ 584 union { /* possible values */ 585 Elf64_Xword eb_val; 586 Elf64_Addr eb_ptr; 587 Elf64_Off eb_off; 588 } eb_un; 589} Elf64_Boot; 590#endif /* defined(_LP64) || defined(_LONGLONG_TYPE) */ 591#endif /* _ASM */ 592 593/* 594 * Attributes 595 */ 596#define EB_NULL 0 /* (void) last entry */ 597#define EB_DYNAMIC 1 /* (*) dynamic structure of subject */ 598#define EB_LDSO_BASE 2 /* (caddr_t) base address of ld.so */ 599#define EB_ARGV 3 /* (caddr_t) argument vector */ 600#define EB_ENVP 4 /* (char **) environment strings */ 601#define EB_AUXV 5 /* (auxv_t *) auxiliary vector */ 602#define EB_DEVZERO 6 /* (int) fd for /dev/zero */ 603#define EB_PAGESIZE 7 /* (int) page size */ 604#define EB_MAX 8 /* number of "EBs" */ 605#define EB_MAX_SIZE32 64 /* size in bytes, _ILP32 */ 606#define EB_MAX_SIZE64 128 /* size in bytes, _LP64 */ 607 608 609#ifndef _ASM 610 611#ifdef __STDC__ 612 613/* 614 * Concurrency communication structure for libc callbacks. 615 */ 616extern void _ld_libc(void *); 617#else /* __STDC__ */ 618extern void _ld_libc(); 619#endif /* __STDC__ */ 620 621#pragma unknown_control_flow(_ld_libc) 622#endif /* _ASM */ 623 624#ifdef __cplusplus 625} 626#endif 627 628#endif /* _SYS_LINK_H */ 629