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 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _RTLD_H 28 #define _RTLD_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 /* 33 * Global include file for the runtime linker support library. 34 */ 35 #include <time.h> 36 #include <sgs.h> 37 #include <thread.h> 38 #include <synch.h> 39 #include <machdep.h> 40 #include <sys/avl.h> 41 #include <alist.h> 42 43 #ifdef _SYSCALL32 44 #include <inttypes.h> 45 #endif 46 47 #ifdef __cplusplus 48 extern "C" { 49 #endif 50 51 52 /* 53 * Linked list of directories or filenames (built from colon separated string). 54 */ 55 typedef struct pnode { 56 const char *p_name; 57 const char *p_oname; 58 size_t p_len; 59 uint_t p_orig; 60 void *p_info; 61 struct pnode *p_next; 62 } Pnode; 63 64 typedef struct rt_map Rt_map; 65 66 /* 67 * A binding descriptor. Establishes the binding relationship between two 68 * objects, the caller (originator) and the dependency (destination). 69 */ 70 typedef struct { 71 Rt_map *b_caller; /* caller (originator) of a binding */ 72 Rt_map *b_depend; /* dependency (destination) of a */ 73 /* binding */ 74 uint_t b_flags; /* relationship of caller to the */ 75 /* dependency */ 76 } Bnd_desc; 77 78 #define BND_NEEDED 0x0001 /* caller NEEDED the dependency */ 79 #define BND_REFER 0x0002 /* caller relocation references the */ 80 /* dependency */ 81 #define BND_FILTER 0x0004 /* pseudo binding to identify filter */ 82 83 /* 84 * Private structure for communication between rtld_db and rtld. 85 * 86 * We must bump the version number whenever a update in one of 87 * the structures/fields that rtld_db reads is updated. This hopefully 88 * permits rtld_db implementations of the future recognize corefiles 89 * produced on older system and deal accordingly. 90 * 91 * As of version 'RTLD_DB_VERSION <= 2' the following fields 92 * were valid for core file examination (basically the public 93 * Link_map): 94 * 95 * ADDR() 96 * NAME() 97 * DYN() 98 * NEXT() 99 * PREV() 100 * 101 * Valid fields for RTLD_DB_VERSION3 102 * 103 * PATHNAME() 104 * PADSTART() 105 * PADIMLEN() 106 * MSIZE() 107 * FLAGS() 108 * FLAGS1() 109 * 110 * Valid fields for RTLD_DB_VERSION4 111 * 112 * TLSMODID() 113 * 114 * Valid fields for RTLD_DB_VERSION5 115 * 116 * Added rtld_flags & FLG_RT_RELOCED to stable flags range 117 * 118 */ 119 #define R_RTLDDB_VERSION1 1 /* base version level - used for core */ 120 /* file examination */ 121 #define R_RTLDDB_VERSION2 2 /* minor revision - not relavant for */ 122 /* core files */ 123 #define R_RTLDDB_VERSION3 3 124 #define R_RTLDDB_VERSION4 4 125 #define R_RTLDDB_VERSION5 5 126 #define R_RTLDDB_VERSION R_RTLDDB_VERSION5 /* current version */ 127 128 typedef struct rtld_db_priv { 129 struct r_debug rtd_rdebug; /* original r_debug structure */ 130 Word rtd_version; /* version no. */ 131 size_t rtd_objpad; /* padding around mmap()ed objects */ 132 List * rtd_dynlmlst; /* pointer to Dynlm_list */ 133 } Rtld_db_priv; 134 135 #ifdef _SYSCALL32 136 typedef struct rtld_db_priv32 { 137 struct r_debug32 rtd_rdebug; /* original r_debug structure */ 138 Elf32_Word rtd_version; /* version no. */ 139 Elf32_Word rtd_objpad; /* padding around mmap()ed objects */ 140 Elf32_Addr rtd_dynlmlst; /* pointer to Dynlm_list */ 141 } Rtld_db_priv32; 142 #endif /* _SYSCALL32 */ 143 144 145 /* 146 * Link map list definition. Link-maps are used to describe each loaded object. 147 * Lists of these link-maps describe the various namespaces within a process. 148 * The process executable and its dependencies are maintained on the lml_main 149 * list. The runtime linker, and its dependencies are maintained on the 150 * lml_rtld list. Additional lists can be created (see dlmopen()) for such 151 * things as auditors and their dependencies. 152 * 153 * Each link-map list maintains an Alist of one, or more, linked lists of 154 * link-maps. For backward compatibility, the lm_head/lm_tail elements are 155 * initialized to the first linked-list of link-maps: 156 * 157 * Lm_list 158 * ---------- 159 * | lm_tail | ------------------------------------ 160 * | lm_head | -------------------- | 161 * | | | Rt_map | Rt_map 162 * | | | ------ | ------ 163 * | | Alist --> | | |--> | | 164 * | | --------- | | | -- | | 165 * | lm_lists | ----> | | | | | --> | | 166 * | | |---------| | | | | | | 167 * | | | lc_head | -- ------ | ------ 168 * | | | lc_tail | ------------------ 169 * | | |---------| 170 * | lc_head | 171 * | lc_tail | 172 * |---------| 173 * 174 * Multiple link-map lists exist to support the addition of lazy loaded 175 * families, filtee families, and dlopen() families. The intent of these 176 * lists is to insure that a family of objects that are to be loaded are 177 * fully relocatable, and hence usable, before they become part of the main 178 * (al_data[0]) link-map control list. This main link-map control list is 179 * the only list in existence when control is transferred to user code. 180 * 181 * During process initialization, the dynamic executable and its non-lazy 182 * dependencies are maintained on al_data[0]. If a new object is loaded, then 183 * this object is added to the next available control list [1], typically 184 * al_data[1]. Any dependencies of this object that have not already been 185 * loaded are added to the same control list. Once all of the objects on the 186 * new control list have been successfully relocated, the objects are moved from 187 * the new control list to the highest control list to which objects of the new 188 * control list bound to, typically al_data[1] to al_data[0]. 189 * 190 * Each loading scenario can be broken down as follows: 191 * 192 * setup() - only the initial link-map control list is used: 193 * i. create al_data[0] 194 * ii. add new link-map for main on al_data[0] 195 * iii. analyze al_data[0] to add all non-lazy dependencies 196 * iv. relocate al_data[0] dependencies. 197 * 198 * dlopen() - the initiator can only be the initial link-map control list: 199 * i. create al_data[1] from caller al_data[0] 200 * ii. add new link-map for the dlopen'ed object on al_data[1] 201 * iii. analyze al_data[1] to add all non-lazy dependencies 202 * iv. relocate al_data[1] dependencies, and move to al_data[0]. 203 * 204 * filtee and lazy loading processing - the initiator can be any link-map 205 * control list that is being relocated: 206 * i. create al_data[y] from caller al_data[x] 207 * ii. add new link-map for the new object on al_data[y] 208 * iii. analyze al_data[y] to add all non-lazy dependencies 209 * iv. relocate al_data[y] dependencies, and move to al_data[x]. 210 * 211 * This Alist therefore maintains a stack of link-map control lists. The newest 212 * link-map control list can locate symbols within any of the former lists, 213 * however, control is not passed to a former list until the newest lists 214 * processing is complete. Thus, objects can't bind to new objects until they 215 * have been fully analyzed and relocated. 216 * 217 * [1] Note, additional link-map control list creation occurs after the head 218 * link-map object (typically the dynamic executable) has been relocated. This 219 * staging is required to satisfy the binding requirements of copy relocations. 220 * Copy relocations, effectively, transfer the bindings of the copied data 221 * (say _iob in libc.so.1) to the copy location (_iob in the application). 222 * Thus an object that might bind to the original copy data must be redirected 223 * to the copy reference. As the knowledge of a copy relocation having taken 224 * place is only known after relocating the application, link-map control list 225 * additions are suspended until after this relocation has completed. 226 */ 227 typedef struct { 228 Rt_map *lc_head; 229 Rt_map *lc_tail; 230 Alist *lc_now; /* pending promoted bind-now objects */ 231 uint_t lc_flags; 232 } Lm_cntl; 233 234 #define LMC_FLG_ANALYZING 0x01 /* control list is being analyzed */ 235 #define LMC_FLG_RELOCATING 0x02 /* control list is being relocated */ 236 #define LMC_FLG_REANALYZE 0x04 /* repeat analysis (established when */ 237 /* interposers are added */ 238 239 struct lm_list { 240 /* 241 * BEGIN: Exposed to rtld_db - don't move, don't delete 242 */ 243 Rt_map *lm_head; /* linked list pointers to active */ 244 Rt_map *lm_tail; /* link-map list */ 245 Alist *lm_handle; /* not used by rtld_db - but spacing */ 246 /* is required for flags */ 247 Word lm_flags; 248 /* 249 * END: Exposed to rtld_db - don't move, don't delete 250 */ 251 int (*lm_peh)(); /* atexit() preexec_exit_handlers */ 252 Rt_map *lm_peh_lmp; /* and object that contributed them */ 253 Rt_map *lm_info_lmp; /* the first object with rtld_info */ 254 Alist *lm_rtldinfo; /* list of RTLDINFO tables */ 255 Audit_list *lm_alp; /* audit list descripter */ 256 avl_tree_t *lm_fpavl; /* avl tree of objects loaded */ 257 Alist *lm_lists; /* active and pending link-map lists */ 258 char ***lm_environ; /* pointer to environment array */ 259 Word lm_tflags; /* transferable flags */ 260 uint_t lm_obj; /* total number of objs on link-map */ 261 uint_t lm_init; /* new obj since last init processing */ 262 uint_t lm_lazy; /* obj with pending lazy dependencies */ 263 uint_t lm_lmid; /* unique link-map list identifier, */ 264 char *lm_lmidstr; /* and associated diagnostic string */ 265 }; 266 267 #ifdef _SYSCALL32 268 struct lm_list32 { 269 /* 270 * BEGIN: Exposed to rtld_db - don't move, don't delete 271 */ 272 Elf32_Addr lm_head; 273 Elf32_Addr lm_tail; 274 Elf32_Addr lm_handle; 275 Elf32_Word lm_flags; 276 /* 277 * END: Exposed to rtld_db - don't move, don't delete 278 */ 279 Elf32_Addr lm_peh; 280 Elf32_Addr lm_peh_lmp; 281 Elf32_Addr lm_info_lmp; 282 Elf32_Addr lm_alp; 283 Elf32_Addr lm_fpavl; 284 Elf32_Addr lm_lists; 285 Elf32_Addr lm_environ; 286 Elf32_Word lm_tflags; 287 uint_t lm_obj; 288 uint_t lm_init; 289 uint_t lm_lazy; 290 uint_t lm_lmid; 291 Elf32_Addr lm_lmidstr; 292 }; 293 #endif /* _SYSCALL32 */ 294 295 /* 296 * Possible Link_map list flags (Lm_list.lm_flags) 297 */ 298 /* 299 * BEGIN: Exposed to rtld_db - don't move, don't delete 300 */ 301 #define LML_FLG_BASELM 0x00000001 /* primary link-map */ 302 #define LML_FLG_RTLDLM 0x00000002 /* rtld link-map */ 303 /* 304 * END: Exposed to rtld_db - don't move, don't delete 305 */ 306 #define LML_FLG_NOAUDIT 0x00000004 /* symbol auditing disabled */ 307 #define LML_FLG_PLTREL 0x00000008 /* deferred plt relocation */ 308 /* initialization */ 309 /* (ld.so.1 only) */ 310 #define LML_FLG_HOLDLOCK 0x00000010 /* hold the rtld mutex lock */ 311 #define LML_FLG_ENVIRON 0x00000020 /* environ var initialized */ 312 #define LML_FLG_INTRPOSE 0x00000040 /* interposing objs on list */ 313 #define LML_FLG_LOCAUDIT 0x00000080 /* local auditors exists for */ 314 /* this link-map list */ 315 #define LML_FLG_LOADAVAIL 0x00000100 /* load anything available */ 316 #define LML_FLG_IGNRELERR 0x00000200 /* ignore relocation errors - */ 317 /* internal for crle(1) */ 318 #define LML_FLG_DBNOTIF 0x00000400 /* binding activity going on */ 319 #define LML_FLG_STARTREL 0x00000800 /* relocation started */ 320 #define LML_FLG_ATEXIT 0x00001000 /* atexit processing */ 321 #define LML_FLG_OBJADDED 0x00002000 /* object(s) added */ 322 #define LML_FLG_OBJDELETED 0x00004000 /* object(s) deleted */ 323 #define LML_FLG_OBJREEVAL 0x00008000 /* existing object(s) needs */ 324 /* tsort reevaluation */ 325 #define LML_FLG_TRC_LDDSTUB 0x00100000 /* identify lddstub */ 326 #define LML_FLG_TRC_ENABLE 0x00200000 /* tracing enabled (ldd) */ 327 #define LML_FLG_TRC_WARN 0x00400000 /* print warnings for undefs */ 328 #define LML_FLG_TRC_VERBOSE 0x00800000 /* verbose (versioning) trace */ 329 #define LML_FLG_TRC_SEARCH 0x01000000 /* trace search paths */ 330 #define LML_FLG_TRC_UNREF 0x02000000 /* trace unreferenced */ 331 /* dependencies */ 332 #define LML_FLG_TRC_UNUSED 0x04000000 /* trace unused dependencies */ 333 #define LML_FLG_TRC_INIT 0x08000000 /* print .init order */ 334 335 #define LML_MSK_TRC 0xfff00000 /* tracing mask */ 336 337 /* 338 * Possible Link_map transferable flags (Lm_list.lm_tflags), i.e., link-map 339 * list flags that can be propagated to any new link-map list created. 340 */ 341 #define LML_TFLG_NOLAZYLD 0x00000001 /* lazy loading disabled */ 342 #define LML_TFLG_NODIRECT 0x00000002 /* direct bindings disabled */ 343 344 #define LML_TFLG_LOADFLTR 0x00000008 /* trigger filtee loading */ 345 346 #define LML_TFLG_AUD_PREINIT 0x00100000 /* preinit (audit) exists */ 347 #define LML_TFLG_AUD_OBJSEARCH 0x00200000 /* objsearch (audit) exists */ 348 #define LML_TFLG_AUD_OBJOPEN 0x00400000 /* objopen (audit) exists */ 349 #define LML_TFLG_AUD_OBJFILTER 0x00800000 /* objfilter (audit) exists */ 350 #define LML_TFLG_AUD_OBJCLOSE 0x01000000 /* objclose (audit) exists */ 351 #define LML_TFLG_AUD_SYMBIND 0x02000000 /* symbind (audit) exists */ 352 #define LML_TFLG_AUD_PLTENTER 0x04000000 /* pltenter (audit) exists */ 353 #define LML_TFLG_AUD_PLTEXIT 0x08000000 /* pltexit (audit) exists */ 354 #define LML_TFLG_AUD_ACTIVITY 0x10000000 /* activity (audit) exists */ 355 356 /* 357 * NOTE: Audit flags have duplicated FLAGS1() values. If more audit flags are 358 * added, update the FLAGS1() reservation FL1_AUD_RS_STR to FL1_AUD_RS_END 359 * defined later. 360 */ 361 #define LML_TFLG_AUD_MASK 0xfff00000 /* audit interfaces mask */ 362 363 364 /* 365 * Information for dlopen(), dlsym(), and dlclose() on libraries linked by rtld. 366 * Each shared object referred from a dlopen call has an associated group 367 * handle structure returned that describes a group of one or more objects. 368 */ 369 typedef struct { 370 Alist *gh_depends; /* handle dependency list */ 371 Rt_map *gh_ownlmp; /* handle owners link-map */ 372 Lm_list *gh_ownlml; /* handle owners link-map list */ 373 uint_t gh_refcnt; /* handle reference count */ 374 uint_t gh_flags; /* handle flags */ 375 } Grp_hdl; 376 377 #define GPH_ZERO 0x0001 /* special handle for dlopen(0) */ 378 #define GPH_LDSO 0x0002 /* special handle for ld.so.1 */ 379 #define GPH_FIRST 0x0004 /* dlsym() can only use originating */ 380 /* dependency */ 381 #define GPH_PARENT 0x0008 /* assign caller as a parent */ 382 #define GPH_FILTEE 0x0010 /* handle used to specify a filtee */ 383 #define GPH_INITIAL 0x0020 /* handle is initialized */ 384 #define GPH_STICKY 0x0040 /* handle is unreferenced, but should */ 385 /* not trigger object removal */ 386 387 /* 388 * A group descriptor. A group handle (Grp_hdl) refers to a group of objects, 389 * each object, and its relationship to the handle, is maintained within a 390 * group descriptor. 391 */ 392 typedef struct { 393 Rt_map * gd_depend; /* dependency */ 394 uint_t gd_flags; /* dependency flags */ 395 } Grp_desc; 396 397 #define GPD_AVAIL 0x0001 /* dependency available to dlsym() */ 398 #define GPD_ADDEPS 0x0002 /* dependencies of this dependency */ 399 /* should be added to handle */ 400 #define GPD_PARENT 0x0004 /* dependency is a parent */ 401 #define GPD_FILTER 0x0008 /* dependency is our filter */ 402 #define GPD_REMOVE 0x1000 /* descriptor is a candidate for */ 403 /* removal from the group */ 404 405 /* 406 * Define threading structures. For compatibility with libthread (T1_VERSION 1 407 * and TI_VERSION 2) our locking structure is sufficient to hold a mutex or a 408 * readers/writers lock. 409 */ 410 typedef struct { 411 union { 412 mutex_t l_mutex; 413 rwlock_t l_rwlock; 414 } u; 415 } Rt_lock; 416 417 typedef cond_t Rt_cond; 418 419 /* 420 * Define a dynamic section information descriptor. This parallels the entries 421 * in the .dynamic section and holds auxiliary information to implement lazy 422 * loading and filtee processing. 423 */ 424 typedef struct { 425 uint_t di_flags; 426 void *di_info; 427 } Dyninfo; 428 429 #define FLG_DI_STDFLTR 0x00001 /* .dynamic entry for DT_FILTER */ 430 #define FLG_DI_AUXFLTR 0x00002 /* .dynamic entry for DT_AUXILIARY */ 431 #define FLG_DI_SYMFLTR 0x00004 /* .dynamic entry for DT_SYMFILTER */ 432 /* and DT_SYMAUXILIARY */ 433 #define MSK_DI_FILTER 0x0000f /* mask for all filter possibilities */ 434 435 #define FLG_DI_NEEDED 0x00010 /* entry represents a dependency */ 436 #define FLG_DI_GROUP 0x00020 /* open dependency as a group */ 437 #define FLG_DI_PROCESSD 0x00040 /* entry has been processed */ 438 439 /* 440 * Data Structure to track AVL tree for pathnames of objects 441 * loaded into memory 442 */ 443 typedef struct { 444 const char *fpn_name; /* object name */ 445 Rt_map *fpn_lmp; /* object link-map */ 446 avl_node_t fpn_avl; /* avl book-keeping (see SGSOFFSETOF) */ 447 uint_t fpn_hash; /* object name hash value */ 448 } FullpathNode; 449 450 /* 451 * Define a mapping structure, which is maintained to describe each mapping 452 * of an object, ie. the text segment, data segment, bss segment, etc. 453 */ 454 typedef struct { 455 caddr_t m_vaddr; /* mapping address */ 456 size_t m_fsize; /* backing file size */ 457 size_t m_msize; /* mapping size */ 458 int m_perm; /* mapping permissions */ 459 } Mmap; 460 461 /* 462 * Link-map definition. 463 */ 464 struct rt_map { 465 /* 466 * BEGIN: Exposed to rtld_db - don't move, don't delete 467 */ 468 Link_map rt_public; /* public data */ 469 char *rt_pathname; /* full pathname of loaded object */ 470 ulong_t rt_padstart; /* start of image (including padding) */ 471 ulong_t rt_padimlen; /* size of image (including padding */ 472 ulong_t rt_msize; /* total memory mapped */ 473 uint_t rt_flags; /* state flags, see FLG below */ 474 uint_t rt_flags1; /* state flags1, see FL1 below */ 475 ulong_t rt_tlsmodid; /* TLS module id */ 476 /* 477 * END: Exposed to rtld_db - don't move, don't delete 478 */ 479 Alist *rt_alias; /* list of linked file names */ 480 Alist *rt_fpnode; /* list of FullpathNode AVL nodes */ 481 void (*rt_init)(); /* address of _init */ 482 void (*rt_fini)(); /* address of _fini */ 483 char *rt_runpath; /* LD_RUN_PATH and its equivalent */ 484 Pnode *rt_runlist; /* Pnode structures */ 485 Alist *rt_depends; /* list of dependencies */ 486 Alist *rt_callers; /* list of callers */ 487 Alist *rt_handles; /* dlopen handles */ 488 Alist *rt_groups; /* groups we're a member of */ 489 ulong_t rt_etext; /* etext address */ 490 struct fct *rt_fct; /* file class table for this object */ 491 Sym *(*rt_symintp)(); /* link map symbol interpreter */ 492 void *rt_priv; /* private data, object type specific */ 493 Lm_list *rt_list; /* link map list we belong to */ 494 uint_t rt_objfltrndx; /* object filtees .dynamic index */ 495 uint_t rt_symsfltrcnt; /* number of standard symbol filtees */ 496 uint_t rt_symafltrcnt; /* number of auxiliary symbol filtees */ 497 int rt_mode; /* usage mode, see RTLD mode flags */ 498 int rt_sortval; /* temporary buffer to traverse graph */ 499 uint_t rt_cycgroup; /* cyclic group */ 500 dev_t rt_stdev; /* device id and inode number for .so */ 501 ino_t rt_stino; /* multiple inclusion checks */ 502 char *rt_origname; /* original pathname of loaded object */ 503 size_t rt_dirsz; /* and its size */ 504 Alist *rt_copy; /* list of copy relocations */ 505 Audit_desc *rt_auditors; /* audit descriptor array */ 506 Audit_info *rt_audinfo; /* audit information descriptor */ 507 Syminfo *rt_syminfo; /* elf .syminfo section - here */ 508 /* because it is checked in */ 509 /* common code */ 510 Addr *rt_initarray; /* .initarray table */ 511 Addr *rt_finiarray; /* .finiarray table */ 512 Addr *rt_preinitarray; /* .preinitarray table */ 513 Mmap *rt_mmaps; /* array of mapping information */ 514 uint_t rt_mmapcnt; /* and associated number */ 515 uint_t rt_initarraysz; /* size of .initarray table */ 516 uint_t rt_finiarraysz; /* size of .finiarray table */ 517 uint_t rt_preinitarraysz; /* size of .preinitarray table */ 518 Dyninfo *rt_dyninfo; /* .dynamic information descriptors */ 519 uint_t rt_dyninfocnt; /* count of dyninfo entries */ 520 uint_t rt_relacount; /* no. of RELATIVE relocations */ 521 uint_t rt_idx; /* hold index within linkmap list */ 522 uint_t rt_lazy; /* lazy dependencies pending */ 523 Rt_cond *rt_condvar; /* variables */ 524 Xword rt_hwcap; /* hardware capabilities */ 525 Xword rt_sfcap; /* software capabilities */ 526 thread_t rt_threadid; /* thread init/fini synchronization */ 527 uint_t rt_cntl; /* link-map control list we belong to */ 528 }; 529 530 531 #ifdef _SYSCALL32 532 /* 533 * Structure to allow 64-bit rtld_db to read 32-bit processes out of procfs. 534 */ 535 typedef struct rt_map32 { 536 /* 537 * BEGIN: Exposed to rtld_db - don't move, don't delete 538 */ 539 Link_map32 rt_public; 540 uint32_t rt_pathname; 541 uint32_t rt_padstart; 542 uint32_t rt_padimlen; 543 uint32_t rt_msize; 544 uint32_t rt_flags; 545 uint32_t rt_flags1; 546 uint32_t rt_tlsmodid; 547 /* 548 * END: Exposed to rtld_db - don't move, don't delete 549 */ 550 uint32_t rt_alias; 551 uint32_t rt_fpnode; 552 uint32_t rt_init; 553 uint32_t rt_fini; 554 uint32_t rt_runpath; 555 uint32_t rt_runlist; 556 uint32_t rt_depends; 557 uint32_t rt_callers; 558 uint32_t rt_handles; 559 uint32_t rt_groups; 560 uint32_t rt_etext; 561 uint32_t rt_fct; 562 uint32_t rt_symintp; 563 uint32_t rt_priv; 564 uint32_t rt_list; 565 uint32_t rt_objfltrndx; 566 uint32_t rt_symsfltrcnt; 567 uint32_t rt_symafltrcnt; 568 int32_t rt_mode; 569 int32_t rt_sortval; 570 uint32_t rt_cycgroup; 571 uint32_t rt_stdev; 572 uint32_t rt_stino; 573 uint32_t rt_origname; 574 uint32_t rt_dirsz; 575 uint32_t rt_copy; 576 uint32_t rt_auditors; 577 uint32_t rt_audinfo; 578 uint32_t rt_syminfo; 579 uint32_t rt_initarray; 580 uint32_t rt_finiarray; 581 uint32_t rt_preinitarray; 582 uint32_t rt_mmaps; 583 uint32_t rt_mmapcnt; 584 uint32_t rt_initarraysz; 585 uint32_t rt_finiarraysz; 586 uint32_t rt_preinitarraysz; 587 uint32_t rt_dyninfo; 588 uint32_t rt_dyninfocnt; 589 uint32_t rt_relacount; 590 uint32_t rt_idx; 591 uint32_t rt_lazy; 592 uint32_t rt_condvar; 593 uint32_t rt_hwcap; 594 uint32_t rt_sfcap; 595 uint32_t rt_threadid; 596 uint32_t rt_cntl; 597 } Rt_map32; 598 599 #endif /* _SYSCALL32 */ 600 601 /* 602 * Link map state flags. 603 */ 604 /* 605 * BEGIN: Exposed to rtld_db - don't move, don't delete 606 */ 607 #define FLG_RT_ISMAIN 0x00000001 /* object represents main executable */ 608 #define FLG_RT_IMGALLOC 0x00000002 /* image is allocated (not mmap'ed) */ 609 /* 610 * Available for r_debug version >= RTLD_DB_VERSION5 611 */ 612 #define FLG_RT_RELOCED 0x00000004 /* object has been relocated */ 613 /* 614 * END: Exposed to rtld_db - don't move, don't delete 615 */ 616 #define FLG_RT_SETGROUP 0x00000008 /* group establishment required */ 617 #define FLG_RT_HWCAP 0x00000010 /* process $HWCAP expansion */ 618 #define FLG_RT_OBJECT 0x00000020 /* object processing (ie. .o's) */ 619 #define FLG_RT_NEWLOAD 0x00000040 /* object is newly loaded */ 620 #define FLG_RT_NODUMP 0x00000080 /* object can't be dldump(3x)'ed */ 621 #define FLG_RT_DELETE 0x00000100 /* object can be deleted */ 622 #define FLG_RT_ANALYZED 0x00000200 /* object has been analyzed */ 623 #define FLG_RT_INITDONE 0x00000400 /* objects .init has been completed */ 624 #define FLG_RT_TRANS 0x00000800 /* object is acting as a translator */ 625 #define FLG_RT_FIXED 0x00001000 /* image location is fixed */ 626 #define FLG_RT_PRELOAD 0x00002000 /* object was preloaded */ 627 #define FLG_RT_ALTER 0x00004000 /* alternative object used */ 628 #define FLG_RT_LOADFLTR 0x00008000 /* trigger filtee loading */ 629 #define FLG_RT_AUDIT 0x00010000 /* object is an auditor */ 630 #define FLG_RT_MODESET 0x00020000 /* MODE() has been initialized */ 631 #define FLG_RT_ANALZING 0x00040000 /* object is being analyzed */ 632 #define FLG_RT_INITFRST 0x00080000 /* execute .init first */ 633 #define FLG_RT_NOOPEN 0x00100000 /* dlopen() not allowed */ 634 #define FLG_RT_FINICLCT 0x00200000 /* fini has been collected (tsort) */ 635 #define FLG_RT_INITCALL 0x00400000 /* objects .init has been called */ 636 #define FLG_RT_INTRPOSE 0x00800000 /* object is an INTERPOSER */ 637 #define FLG_RT_DIRECT 0x01000000 /* object has DIRECT bindings enabled */ 638 #define FLG_RT_SUNWBSS 0x02000000 /* object with PT_SUNWBSS, not mapped */ 639 #define FLG_RT_MOVE 0x04000000 /* object needs move operation */ 640 #define FLG_RT_DLSYM 0x08000000 /* dlsym in progress on object */ 641 #define FLG_RT_REGSYMS 0x10000000 /* object has DT_REGISTER entries */ 642 #define FLG_RT_INITCLCT 0x20000000 /* init has been collected (tsort) */ 643 #define FLG_RT_HANDLE 0x40000000 /* generate a handle for this object */ 644 #define FLG_RT_RELOCING 0x80000000 /* object is being relocated */ 645 646 #define FL1_RT_COPYTOOK 0x00000001 /* copy relocation taken */ 647 #define FL1_RT_RELATIVE 0x00000002 /* relative path expansion required */ 648 #define FL1_RT_CONFSET 0x00000004 /* object was loaded by crle(1) */ 649 #define FL1_RT_NODEFLIB 0x00000008 /* ignore default library search */ 650 #define FL1_RT_ENDFILTE 0x00000010 /* filtee terminates filters search */ 651 #define FL1_RT_DISPREL 0x00000020 /* object has *disp* relocation */ 652 #define FL1_RT_TEXTREL 0x00000040 /* DT_TEXTREL set in object */ 653 #define FL1_RT_INITWAIT 0x00000080 /* threads are waiting on .init */ 654 #define FL1_RT_LDDSTUB 0x00000100 /* identify lddstub */ 655 #define FL1_RT_NOINIFIN 0x00000200 /* no .init or .fini exists */ 656 #define FL1_RT_USED 0x00000400 /* symbol referenced from this object */ 657 #define FL1_RT_SYMBOLIC 0x00000800 /* DF_SYMBOLIC was set - use */ 658 /* symbolic sym resolution */ 659 #define FL1_RT_OBJSFLTR 0x00001000 /* object is acting as a standard */ 660 #define FL1_RT_OBJAFLTR 0x00002000 /* or auxiliary filter */ 661 #define FL1_RT_SYMSFLTR 0x00004000 /* symbol is acting as a standard */ 662 #define FL1_RT_SYMAFLTR 0x00008000 /* or auxiliary filter */ 663 #define MSK_RT_FILTER 0x0000f000 /* mask for all filter possibilites */ 664 665 /* 666 * The following range of bits are reserved to hold LML_TFLG_AUD_ values 667 * (although the definitions themselves aren't used anywhere). 668 */ 669 #define FL1_AUD_RS_STR 0x00100000 /* RESERVATION start for AU flags */ 670 #define FL1_AUD_RS_END 0x80000000 /* RESERVATION end for AU flags */ 671 672 673 /* 674 * Flags for the tls_modactivity() routine 675 */ 676 #define TM_FLG_MODADD 0x01 /* call tls_modadd() interface */ 677 #define TM_FLG_MODREM 0x02 /* call tls_modrem() interface */ 678 679 /* 680 * Macros for getting to link_map data. 681 */ 682 #define ADDR(X) ((X)->rt_public.l_addr) 683 #define NAME(X) ((X)->rt_public.l_name) 684 #define DYN(X) ((X)->rt_public.l_ld) 685 #define NEXT(X) ((X)->rt_public.l_next) 686 #define PREV(X) ((X)->rt_public.l_prev) 687 #define REFNAME(X) ((X)->rt_public.l_refname) 688 689 /* 690 * Macros for getting to linker private data. 691 */ 692 #define PATHNAME(X) ((X)->rt_pathname) 693 #define PADSTART(X) ((X)->rt_padstart) 694 #define PADIMLEN(X) ((X)->rt_padimlen) 695 #define MSIZE(X) ((X)->rt_msize) 696 #define FLAGS(X) ((X)->rt_flags) 697 #define FLAGS1(X) ((X)->rt_flags1) 698 #define TLSMODID(X) ((X)->rt_tlsmodid) 699 700 #define ALIAS(X) ((X)->rt_alias) 701 #define FPNODE(X) ((X)->rt_fpnode) 702 #define INIT(X) ((X)->rt_init) 703 #define FINI(X) ((X)->rt_fini) 704 #define RPATH(X) ((X)->rt_runpath) 705 #define RLIST(X) ((X)->rt_runlist) 706 #define DEPENDS(X) ((X)->rt_depends) 707 #define CALLERS(X) ((X)->rt_callers) 708 #define HANDLES(X) ((X)->rt_handles) 709 #define GROUPS(X) ((X)->rt_groups) 710 #define ETEXT(X) ((X)->rt_etext) 711 #define FCT(X) ((X)->rt_fct) 712 #define SYMINTP(X) ((X)->rt_symintp) 713 #define LIST(X) ((X)->rt_list) 714 #define OBJFLTRNDX(X) ((X)->rt_objfltrndx) 715 #define SYMSFLTRCNT(X) ((X)->rt_symsfltrcnt) 716 #define SYMAFLTRCNT(X) ((X)->rt_symafltrcnt) 717 #define MODE(X) ((X)->rt_mode) 718 #define SORTVAL(X) ((X)->rt_sortval) 719 #define CYCGROUP(X) ((X)->rt_cycgroup) 720 #define STDEV(X) ((X)->rt_stdev) 721 #define STINO(X) ((X)->rt_stino) 722 #define ORIGNAME(X) ((X)->rt_origname) 723 #define DIRSZ(X) ((X)->rt_dirsz) 724 #define COPY(X) ((X)->rt_copy) 725 #define AUDITORS(X) ((X)->rt_auditors) 726 #define AUDINFO(X) ((X)->rt_audinfo) 727 #define SYMINFO(X) ((X)->rt_syminfo) 728 #define INITARRAY(X) ((X)->rt_initarray) 729 #define FINIARRAY(X) ((X)->rt_finiarray) 730 #define PREINITARRAY(X) ((X)->rt_preinitarray) 731 #define MMAPS(X) ((X)->rt_mmaps) 732 #define MMAPCNT(X) ((X)->rt_mmapcnt) 733 #define INITARRAYSZ(X) ((X)->rt_initarraysz) 734 #define FINIARRAYSZ(X) ((X)->rt_finiarraysz) 735 #define PREINITARRAYSZ(X) ((X)->rt_preinitarraysz) 736 #define DYNINFO(X) ((X)->rt_dyninfo) 737 #define DYNINFOCNT(X) ((X)->rt_dyninfocnt) 738 #define RELACOUNT(X) ((X)->rt_relacount) 739 #define IDX(X) ((X)->rt_idx) 740 #define LAZY(X) ((X)->rt_lazy) 741 #define CONDVAR(X) ((X)->rt_condvar) 742 #define CNTL(X) ((X)->rt_cntl) 743 #define HWCAP(X) ((X)->rt_hwcap) 744 #define SFCAP(X) ((X)->rt_sfcap) 745 #define THREADID(X) ((X)->rt_threadid) 746 747 /* 748 * Flags for tsorting. 749 */ 750 #define RT_SORT_FWD 0x01 /* topological sort (.fini) */ 751 #define RT_SORT_REV 0x02 /* reverse topological sort (.init) */ 752 #define RT_SORT_DELETE 0x10 /* process FLG_RT_DELNEED objects */ 753 /* only (called via dlclose()) */ 754 /* 755 * Flags for lookup_sym (and hence find_sym) routines. 756 */ 757 #define LKUP_DEFT 0x0000 /* simple lookup request */ 758 #define LKUP_SPEC 0x0001 /* special ELF lookup (allows address */ 759 /* resolutions to plt[] entries) */ 760 #define LKUP_LDOT 0x0002 /* indicates the original A_OUT */ 761 /* symbol had a leading `.' */ 762 #define LKUP_FIRST 0x0004 /* lookup symbol in first link map */ 763 /* only */ 764 #define LKUP_COPY 0x0008 /* lookup symbol for a COPY reloc, do */ 765 /* not bind to symbol at head */ 766 #define LKUP_ALLCNTLIST 0x0010 /* lookup symbol in all control lists */ 767 #define LKUP_SELF 0x0020 /* lookup symbol in ourself - undef */ 768 /* is valid */ 769 #define LKUP_WEAK 0x0040 /* relocation reference is weak */ 770 #define LKUP_NEXT 0x0080 /* request originates from RTLD_NEXT */ 771 #define LKUP_NODESCENT 0x0100 /* don't descend through dependencies */ 772 #define LKUP_NOFALBACK 0x0200 /* don't fall back to loading */ 773 /* pending lazy dependencies */ 774 #define LKUP_DIRECT 0x0400 /* direct binding request */ 775 #define LKUP_SYMNDX 0x0800 /* establish symbol index */ 776 777 /* 778 * Data structure for calling lookup_sym() 779 */ 780 typedef struct { 781 const char *sl_name; /* symbol name */ 782 Rt_map *sl_cmap; /* callers link-map */ 783 Rt_map *sl_imap; /* initial link-map to search */ 784 ulong_t sl_hash; /* symbol hash value */ 785 ulong_t sl_rsymndx; /* referencing reloc symndx */ 786 uint_t sl_flags; /* lookup flags */ 787 } Slookup; 788 789 790 typedef enum { 791 PLT_T_NONE = 0, 792 PLT_T_21D, 793 PLT_T_24D, 794 PLT_T_U32, 795 PLT_T_U44, 796 PLT_T_FULL, 797 PLT_T_FAR, 798 PLT_T_NUM /* Must be last */ 799 } Pltbindtype; 800 801 /* 802 * Prototypes. 803 */ 804 extern Lm_list lml_main; /* main's link map list */ 805 extern Lm_list lml_rtld; /* rtld's link map list */ 806 extern Lm_list *lml_list[]; 807 808 extern Pltbindtype elf_plt_write(uintptr_t, uintptr_t, void *, uintptr_t, 809 Xword); 810 extern Rt_map *is_so_loaded(Lm_list *, const char *, int); 811 extern Sym *lookup_sym(Slookup *, Rt_map **, uint_t *); 812 extern int rt_dldump(Rt_map *, const char *, int, Addr); 813 814 #ifdef __cplusplus 815 } 816 #endif 817 818 #endif /* _RTLD_H */ 819