1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1988 AT&T 24 * All Rights Reserved 25 * 26 * Copyright (c) 1990, 2010, Oracle and/or its affiliates. All rights reserved. 27 */ 28 #ifndef __RTLD_H 29 #define __RTLD_H 30 31 /* 32 * Common header for run-time linker. 33 */ 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 #include <sys/avl.h> 37 #include <sys/mman.h> 38 #include <stdarg.h> 39 #include <synch.h> 40 #include <signal.h> 41 #include <errno.h> 42 #include <unistd.h> 43 #include <link.h> 44 #include <rtld.h> 45 #include <sgs.h> 46 #include <machdep.h> 47 #include <rtc.h> 48 #include <debug.h> 49 #include <msg.h> 50 #include <libc_int.h> 51 52 #ifdef __cplusplus 53 extern "C" { 54 #endif 55 56 /* 57 * Dependency search rule order. 58 */ 59 #define RPLENV 1 /* replaceable LD_LIBRARY_PATH */ 60 #define PRMENV 2 /* permanent LD_LIBRARY_PATH */ 61 #define RUNPATH 3 /* callers runpath */ 62 #define DEFAULT 4 /* default library path */ 63 64 typedef struct fdesc Fdesc; 65 typedef struct fct Fct; 66 typedef struct pdesc Pdesc; 67 68 /* 69 * Data structure for file class specific functions and data. 70 */ 71 struct fct { 72 /* Verify that the object is of this class. */ 73 Fct *(*fct_verify_file)(caddr_t, size_t, Fdesc *, const char *, 74 Rej_desc *); 75 76 /* Generate a link-map to describe the loaded object. */ 77 Rt_map *(*fct_new_lmp)(Lm_list *, Aliste, Fdesc *, Addr, size_t, 78 void *, int *); 79 80 /* Retrieve the entry point of the object. */ 81 Addr (*fct_entry_pt)(void); 82 83 /* Determine the objects dependencies (needed entries). */ 84 int (*fct_needed)(Lm_list *, Aliste, Rt_map *, int *); 85 86 /* Look up a symbol for the object. */ 87 int (*fct_lookup_sym)(Slookup *, Sresult *, uint_t *, int *); 88 89 /* Relocate the object. */ 90 int (*fct_reloc)(Rt_map *, uint_t, int *, APlist **); 91 92 /* List of default directories to search for dependencies. */ 93 Alist **(*fct_get_def_dirs)(void); 94 95 /* List of secure directories to search for dependencies. */ 96 Alist **(*fct_get_sec_dirs)(void); 97 98 /* Transpose the name of the object. */ 99 int (*fct_fix_name)(const char *, Rt_map *, Alist **, Aliste, 100 uint_t); 101 102 /* Get a shared object name */ 103 char *(*fct_get_so)(const char *, const char *, size_t, size_t); 104 105 /* Retrieve a symbolic address from the object. */ 106 void (*fct_dladdr)(ulong_t, Rt_map *, Dl_info *, void **, int); 107 108 /* Process a dlsym(3c) request within the object. */ 109 int (*fct_dlsym)(Grp_hdl *, Slookup *, Sresult *, uint_t *, int *); 110 }; 111 112 /* 113 * Macros for getting to the file class table. 114 */ 115 #define LM_ENTRY_PT(X) ((X)->rt_fct->fct_entry_pt) 116 #define LM_NEEDED(X) ((X)->rt_fct->fct_needed) 117 #define LM_LOOKUP_SYM(X) ((X)->rt_fct->fct_lookup_sym) 118 #define LM_RELOC(X) ((X)->rt_fct->fct_reloc) 119 #define LM_DEFAULT_DIRS(X) ((X)->rt_fct->fct_get_def_dirs) 120 #define LM_SECURE_DIRS(X) ((X)->rt_fct->fct_get_sec_dirs) 121 #define LM_FIX_NAME(X) ((X)->rt_fct->fct_fix_name) 122 #define LM_GET_SO(X) ((X)->rt_fct->fct_get_so) 123 #define LM_DLADDR(X) ((X)->rt_fct->fct_dladdr) 124 #define LM_DLSYM(X) ((X)->rt_fct->fct_dlsym) 125 126 /* 127 * Initial memory map allocation. Typical ELF objects contain a text and data 128 * segment, which can be augmented with a bss mapping. Add a bunch more for 129 * luck. 130 */ 131 #define MMAPFD_NUM 10 132 133 /* 134 * Define Alist initialization counts. 135 */ 136 #define AL_CNT_ALIAS 2 /* ALIAS() */ 137 #define AL_CNT_DEPENDS 20 /* DEPENDS() */ 138 #define AL_CNT_CALLERS 20 /* CALLERS() */ 139 #define AL_CNT_GROUPS 20 /* GROUPS() */ 140 #define AL_CNT_COPYREL 10 /* COPY() */ 141 #define AL_CNT_LAZYFIND 10 /* elf_lazy_find_sym() */ 142 #define AL_CNT_GRPCLCT 10 /* gdp_collect() */ 143 #define AL_CNT_DEPCLCT 10 /* load_finish() */ 144 #define AL_CNT_RTLDINFO 1 /* RTLDINFO() */ 145 #define AL_CNT_FPNODE 4 /* FPNODE() */ 146 #define AL_CNT_LMLISTS 20 /* lm_lists */ 147 #define AL_CNT_LMNOW 8 /* lm_now */ 148 #define AL_CNT_RELBIND 20 /* relocation binding */ 149 #define AL_CNT_ACTAUDIT 2 /* lm_actaudit */ 150 #define AL_CNT_MOVES 10 /* move_data */ 151 #define AL_CNT_MPOBJS 4 /* elf_obj_file() */ 152 #define AL_CNT_TEXTREL 2 /* text relocation segment */ 153 #define AL_CNT_NEEDED 1 /* dependency path */ 154 #define AL_CNT_SEARCH 4 /* search path */ 155 #define AL_CNT_FILTEES 2 /* filtee path */ 156 #define AL_CNT_HANDLES 1 /* hdl_list[] */ 157 #define AL_CNT_FREELIST 80 /* free_alp */ 158 #define AL_CNT_CAP 10 /* capabilities candidate */ 159 #define AL_CNT_SPATH 4 /* search path */ 160 #define AL_CNT_DYNLIST 2 /* dynlm_list */ 161 #define AL_CNT_PENDING 2 /* pending tsort list (INITFIRST) */ 162 #define AL_CNT_PLTPAD 10 /* plt padding */ 163 #define AL_CNT_AUDITORS 2 /* auditing list */ 164 #define AL_CNT_ENVIRON 20 /* environment list (enough for ldd) */ 165 166 /* 167 * Size of buffer for building error messages. 168 */ 169 #define ERRSIZE 2048 /* MAXPATHLEN * 2 */ 170 171 /* 172 * Configuration file information. 173 */ 174 typedef struct config { 175 const char *c_name; 176 Addr c_bgn; 177 Addr c_end; 178 Word *c_hashtbl; 179 Word *c_hashchain; 180 const char *c_strtbl; 181 Rtc_obj *c_objtbl; 182 Rtc_fltr *c_fltr; 183 Rtc_flte *c_flte; 184 } Config; 185 186 /* 187 * Register symbol list. 188 */ 189 typedef struct reglist { 190 Rt_map *rl_lmp; /* defining object */ 191 Sym *rl_sym; /* regsym */ 192 struct reglist *rl_next; /* next entry */ 193 } Reglist; 194 195 /* 196 * Data structure to hold interpreter information. 197 */ 198 typedef struct interp { 199 char *i_name; /* interpreter name */ 200 caddr_t i_faddr; /* address interpreter is mapped at */ 201 } Interp; 202 203 /* 204 * Data structure used to keep track of copy relocations. These relocations 205 * are collected during initial relocation processing and maintained on the 206 * COPY(lmp) list of the defining object. Each copy list is also added to the 207 * COPY(lmp) of the head object (normally the application dynamic executable) 208 * from which they will be processed after all relocations are done. 209 * 210 * The use of RTLD_GROUP will also reference individual objects COPY(lmp) lists 211 * in case a bound symbol must be assigned to it actual copy relocation. 212 */ 213 typedef struct { 214 const char *r_name; /* symbol name */ 215 Sym *r_rsym; /* reference symbol table entry */ 216 Rt_map *r_rlmp; /* reference link map */ 217 Rt_map *r_dlmp; /* definition link map */ 218 Sym *r_dsym; /* definition symbol table entry */ 219 void *r_radd; /* copy to address */ 220 const void *r_dadd; /* copy from address */ 221 ulong_t r_size; /* copy size bytes */ 222 } Rel_copy; 223 224 /* 225 * Define a file descriptor, which maintains information regarding a pathname 226 * that has been opened and minimally inspected. 227 */ 228 struct fdesc { 229 Rt_map *fd_lmp; /* existing link-map pointer */ 230 Lm_list *fd_lml; /* callers link-map list */ 231 Fct *fd_ftp; /* file functions pointer */ 232 const char *fd_oname; /* original file name */ 233 const char *fd_odir; /* original directory name */ 234 const char *fd_nname; /* new file (expanded) name */ 235 const char *fd_pname; /* new path (resolved) name */ 236 dev_t fd_dev; /* file device number */ 237 rtld_ino_t fd_ino; /* file inode number */ 238 avl_index_t fd_avlwhere; /* avl tree insertion index */ 239 Syscapset fd_scapset; /* capabilities */ 240 mmapobj_result_t *fd_mapp; /* mapping pointer */ 241 uint_t fd_mapn; /* mapping number */ 242 uint_t fd_flags; 243 }; 244 245 #define FLG_FD_ALTER 0x0001 /* file is an alternate */ 246 #define FLG_FD_SLASH 0x0002 /* file contains a "/" */ 247 #define FLG_FD_RESOLVED 0x0004 /* fd_nname has been resolved */ 248 #define FLG_FD_ALTCHECK 0x0008 /* alternative system capabilities */ 249 /* checked */ 250 #define FLG_FD_ALTCAP 0x0010 /* alternative system capabilities */ 251 /* should be used */ 252 #define FLG_FD_IGNORE 0x0020 /* descriptor should be ignored */ 253 254 /* 255 * File descriptor availability flag. 256 */ 257 #define FD_UNAVAIL -1 258 259 /* 260 * Disabled filter flag. Filter objects are referenced using their .dynamic 261 * index (DT_FILTER or DT_AUXILIARY). This index is saved and used to lookup 262 * the required filter. Note that 0 is a valid .dynamic index. The caller's 263 * OBJFLTRNDX() element is initialized using the following flag, and should 264 * the filter's initialization fail, is reset to this value to indicate the 265 * filter is disabled. UINT_MAX provides a convenient invalid .dynamic index. 266 */ 267 #define FLTR_DISABLED UINT_MAX 268 269 /* 270 * Status flags for rtld_flags 271 */ 272 #define RT_FL_THREADS 0x00000001 /* threads are enabled */ 273 #define RT_FL_WARNFLTR 0x00000002 /* warn of missing filtees (ldd) */ 274 #define RT_FL_DBNOTIF 0x00000004 /* binding activity going on */ 275 #define RT_FL_DEFERRED 0x00000008 /* load deferred dependencies (ldd) */ 276 #define RT_FL_NOBIND 0x00000010 /* don't carry out plt binding */ 277 #define RT_FL_NOVERSION 0x00000020 /* disable version checking */ 278 #define RT_FL_SECURE 0x00000040 /* setuid/segid flag */ 279 #define RT_FL_APPLIC 0x00000080 /* are we executing user code */ 280 #define RT_FL_NOENVIRON 0x00000100 /* don't process environment */ 281 /* variables (ld.so.1 -e) */ 282 #define RT_FL_CONFGEN 0x00000200 /* don't relocate initiating object */ 283 /* set by crle(1) */ 284 #define RT_FL_CONFAPP 0x00000400 /* application specific configuration */ 285 /* cache required */ 286 #define RT_FL_DEBUGGER 0x00000800 /* a debugger is monitoring us */ 287 #define RT_FL_OPERATION 0x00001000 /* start recording operations */ 288 #define RT_FL_NEWLOCALE 0x00002000 /* message locale has changed */ 289 #define RT_FL_NOBAPLT 0x00004000 /* sparc: don't use ba plt's */ 290 #define RT_FL_NOAUXFLTR 0x00008000 /* disable auxiliary filters */ 291 292 #define RT_FL_NOAUDIT 0x00020000 /* disable auditing */ 293 #define RT_FL_ATEXIT 0x00040000 /* we're shutting down */ 294 #define RT_FL_SILENCERR 0x00080000 /* silence error messages */ 295 296 #define RT_FL_INITFIRST 0x00200000 /* processing a DT_INITFIRST object */ 297 298 #define RT_FL_DEMANGLE 0x01000000 /* demangle C++ symbol names */ 299 #define RT_FL_NOCFG 0x02000000 /* disable config file use */ 300 #define RT_FL_NODIRCFG 0x04000000 /* disable directory config use */ 301 #define RT_FL_NOOBJALT 0x08000000 /* disable object alternative use */ 302 #define RT_FL_NOENVCFG 0x10000000 /* disable config envars use */ 303 #define RT_FL_DIRCFG 0x20000000 /* directory config info available */ 304 #define RT_FL_OBJALT 0x40000000 /* object alternatives are available */ 305 #define RT_FL_MEMRESV 0x80000000 /* memory reservation established */ 306 307 /* 308 * Status flags for rtld_flags2 309 */ 310 #define RT_FL2_HASAUDIT 0x00000001 /* auditing lm_list is present */ 311 #define RT_FL2_RTLDSEEN 0x00000002 /* rtldinfo has been set */ 312 #define RT_FL2_UNIFPROC 0x00000004 /* libc/libthread unified environment */ 313 314 #define RT_FL2_NOFLTCFG 0x00000010 /* disable config filter use */ 315 #define RT_FL2_FLTCFG 0x00000020 /* filter config info available */ 316 #define RT_FL2_HWCAP 0x00000040 /* hardware capabilities available */ 317 #define RT_FL2_FTL2WARN 0x00000080 /* convert fatal to warning messages */ 318 #define RT_FL2_BINDNOW 0x00000100 /* LD_BIND_NOW in effect */ 319 #define RT_FL2_BINDLAZY 0x00000200 /* disable RTLD_NOW (and LD_BIND_NOW) */ 320 #define RT_FL2_PLMSETUP 0x00000400 /* primary link-map set up complete */ 321 #define RT_FL2_BRANDED 0x00000800 /* process is branded */ 322 #define RT_FL2_NOPLM 0x00001000 /* process has no primary link map */ 323 #define RT_FL2_SETUID 0x00002000 /* ld.so.1 is setuid root */ 324 #define RT_FL2_ADDR32 0x00004000 /* 32-bit address space requirement */ 325 326 /* 327 * Information flags for env_info. 328 */ 329 #define ENV_INF_PATHCFG 0x00000001 /* replaceable LD_LIBRARY_PATH */ 330 /* originates from configuration */ 331 /* file */ 332 #define ENV_INF_FLAGCFG 0x00000002 /* replaceable LD_FLAGS originates */ 333 /* from configuration file */ 334 335 /* 336 * RTLDINFO descriptor. 337 */ 338 typedef struct { 339 Rt_map *rti_lmp; /* RTLDINFO provider */ 340 Lc_interface *rti_info; /* RTLDINFO data */ 341 } Rti_desc; 342 343 /* 344 * Binding flags for the rt_bind_guard()/rt_bind_clear() routines. 345 * These are defined in usr/src/lib/libc/inc/libc_int.h in the 346 * latest version of the libc/rtld runtime interface (CI_V_FIVE). 347 */ 348 #if !defined(CI_V_FIVE) 349 #define THR_FLG_RTLD 0x00000001 /* rtldlock bind guard flag */ 350 #define THR_FLG_NOLOCK 0x00000000 /* no-op before CI_V_FIVE */ 351 #define THR_FLG_REENTER 0x00000000 /* no-op before CI_V_FIVE */ 352 #endif 353 354 #define ROUND(x, a) (((int)(x) + ((int)(a) - 1)) & ~((int)(a) - 1)) 355 356 /* 357 * Print buffer. 358 */ 359 typedef struct { 360 char *pr_buf; /* pointer to beginning of buffer */ 361 char *pr_cur; /* pointer to next free char in buffer */ 362 size_t pr_len; /* buffer size */ 363 int pr_fd; /* output fd */ 364 } Prfbuf; 365 366 /* 367 * Path name descriptor. Used to construct various path names such as search 368 * paths, dependency paths, filter paths etc. The pd_info element can be used 369 * to hold various pointers, like Grp_hdl, Rtc_obj, etc. 370 */ 371 struct pdesc { 372 const char *pd_pname; /* path name - may be expanded */ 373 const char *pd_oname; /* original name - unexpanded */ 374 void *pd_info; /* possible auxiliary information */ 375 size_t pd_plen; /* path name length */ 376 uint_t pd_flags; /* descriptor specific flags */ 377 }; 378 379 /* 380 * Path name descriptors are passed to expand_path() and expand(). These 381 * routines break down possible multiple path strings (separated with ":"), 382 * and perform any reserved token expansion. These routines are passed 383 * information that indicates the use of the path, for example, search paths, 384 * i.e., LD_LIBRARY_PATH, RPATHS, etc. are defined using la_objsearch() 385 * information (see LA_SER flags in link.h). This information is recorded in 386 * the pd_flags field for later use. 387 * 388 * Define expansion path tokens. These are used to prevent various expansions 389 * from occurring, and record those expansions that do. Any expansion 390 * information is also recorded in the pd_flags field, and thus is or'd 391 * together with any LA_SER flags. 392 */ 393 #define PD_TKN_ORIGIN 0x00001000 /* $ORIGIN expansion has occurred */ 394 #define PD_TKN_PLATFORM 0x00002000 /* $PLATFORM expansion has occurred */ 395 #define PD_TKN_OSNAME 0x00004000 /* $OSNAME expansion has occurred */ 396 #define PD_TKN_OSREL 0x00008000 /* $OSREL expansion has occurred */ 397 #define PD_TKN_ISALIST 0x00010000 /* $ISALIST expansion has occurred */ 398 #define PD_TKN_CAP 0x00020000 /* $CAPABILITY/$HWCAP expansion has */ 399 /* occurred */ 400 #define PD_TKN_MACHINE 0x00040000 /* $MACHINE expansion has occurred */ 401 #define PD_TKN_RESOLVED 0x00080000 /* resolvepath() expansion has */ 402 /* occurred */ 403 #define PD_MSK_EXPAND 0x000ff000 /* mask for all expansions */ 404 405 /* 406 * Define additional path information. These definitions extend the path 407 * information, and may be passed into expand_path(), or set internally, or 408 * inherited from expand(). These definitions are or'd together with any 409 * LA_SER_ flags and PD_TKN_ flags. 410 */ 411 #define PD_FLG_PNSLASH 0x00100000 /* pd_pname contains a slash */ 412 #define PD_FLG_DUPLICAT 0x00200000 /* path is a duplicate */ 413 #define PD_FLG_EXTLOAD 0x00400000 /* path defines extra loaded objects */ 414 /* (preload, audit etc.) */ 415 #define PD_FLG_UNIQUE 0x00800000 /* ensure path is unique */ 416 #define PD_FLG_USED 0x01000000 /* indicate that path is used */ 417 #define PD_FLG_FULLPATH 0x02000000 /* ensure path is a full path */ 418 419 #define PD_MSK_INHERIT 0x0ffff000 /* mask for pd_flags incorporation */ 420 421 /* 422 * Additional token expansion information. Although these flags may be set 423 * within a token data item return from expand(), they are masked off with 424 * PD_MSK_INHERIT prior to any expansion information being recorded in a path 425 * name descriptor for later diagnostics. 426 */ 427 #define TKN_NONE 0x00000001 /* no token expansion has occurred */ 428 #define TKN_DOTSLASH 0x00000002 /* path contains a "./" */ 429 430 /* 431 * dlopen() handle list size. 432 */ 433 #define HDLIST_SZ 101 /* prime no. for hashing */ 434 #define HDLIST_ORP 102 /* orphan handle list */ 435 436 /* 437 * Define a path name search descriptor. This "cookie" maintains state as 438 * search paths are processed with get_next_dir(). Note, the path list is an 439 * indirect pointer, as search paths can be reevaluated for secure applications 440 * to provide better error diagnostics. 441 */ 442 typedef struct { 443 uchar_t *sp_rule; /* present search rule */ 444 Alist **sp_dalpp; /* present path list within rule */ 445 Aliste sp_idx; /* present index within path list */ 446 } Spath_desc; 447 448 /* 449 * Define a path name definition descriptor. Used to maintain initial ELF and 450 * AOUT path name definitions. 451 */ 452 typedef struct { 453 const char *sd_name; /* path name */ 454 size_t sd_len; /* path name size */ 455 } Spath_defn; 456 457 /* 458 * Define _caller flags. 459 */ 460 #define CL_NONE 0 461 #define CL_EXECDEF 1 /* supply the executable as a default */ 462 /* if the caller can't be determined */ 463 464 /* 465 * Binding information flags. These flags are passed up from low level binding 466 * routines to indicate "additional" information, such as why a binding has been 467 * rejected. These flags use the same data element as is used to record any 468 * DBG_BINFO flags. The DBG_BINFO flags are used to define the final bindings 469 * information and are used to provide better binding diagnostics. 470 */ 471 #define BINFO_REJDIRECT 0x010000 /* reject a direct binding */ 472 #define BINFO_REJSINGLE 0x100000 /* reject a singleton binding */ 473 #define BINFO_REJGROUP 0x200000 /* reject a group binding */ 474 475 #define BINFO_MSK_TRYAGAIN 0xf00000 /* a mask of bindings that */ 476 /* should be retried */ 477 #define BINFO_MSK_REJECTED 0xff0000 /* a mask of bindings that */ 478 /* have been rejected */ 479 480 /* 481 * The 32-bit version of rtld uses special stat() wrapper functions 482 * that preserve the non-largefile semantics of stat()/fstat() while 483 * allowing for large inode values. The 64-bit rtld uses stat() directly. 484 */ 485 #ifdef _LP64 486 #define rtld_fstat fstat 487 #define rtld_stat stat 488 typedef struct stat rtld_stat_t; 489 #else 490 typedef struct { 491 dev_t st_dev; 492 rtld_ino_t st_ino; 493 mode_t st_mode; 494 uid_t st_uid; 495 off_t st_size; 496 timestruc_t st_mtim; 497 #ifdef sparc 498 blksize_t st_blksize; 499 #endif 500 } rtld_stat_t; 501 #endif 502 503 /* 504 * Some capabilities aux vector definitions have been removed over time. 505 * However, existing objects may define these capabilities. Establish 506 * capability masks that provide for deleting any removed capabilities, so 507 * that these capabilities are not used to validate the associated object. 508 * 509 * These masks are tightly coupled to the aux vector definitions in auxv_386.h 510 * and auxv_SPARC.h, however they are maintained here, as only ld.so.1 needs 511 * to remove these capabilities. These definitions also describe where the 512 * flags are associated and allow for providing multi-architecture definitions 513 * should they become necessary, without having to pollute global header files. 514 */ 515 #if defined(__x86) 516 #define AV_HW1_IGNORE (0x8000 | 0x2000) /* withdrawn MON and PAUSE */ 517 #else /* auxv_386.h flags */ 518 #define AV_HW1_IGNORE 0 519 #endif 520 521 /* 522 * Data declarations. 523 */ 524 extern Lc_desc glcs[]; /* global external interfaces */ 525 526 extern Rt_lock rtldlock; /* rtld lock */ 527 extern int thr_flg_nolock; 528 extern int thr_flg_reenter; 529 530 extern APlist *dynlm_list; /* dynamic list of link-maps */ 531 extern char **environ; /* environ pointer */ 532 533 extern int dyn_plt_ent_size; /* Size of dynamic plt's */ 534 extern ulong_t at_flags; /* machine specific file flags */ 535 extern const char *procname; /* file name of executing process */ 536 extern Rtld_db_priv r_debug; /* debugging information */ 537 extern char *lasterr; /* string describing last error */ 538 extern Interp *interp; /* ELF executable interpreter info */ 539 extern const char *rtldname; /* name of the dynamic linker */ 540 extern APlist *hdl_alp[]; /* dlopen() handle list */ 541 extern size_t syspagsz; /* system page size */ 542 extern Isa_desc *isa; /* isalist descriptor */ 543 extern Uts_desc *uts; /* utsname descriptor */ 544 extern uint_t rtld_flags; /* status flags for RTLD */ 545 extern uint_t rtld_flags2; /* additional status flags for RTLD */ 546 extern uint32_t pltcnt21d; /* cnt of 21d PLTs */ 547 extern uint32_t pltcnt24d; /* cnt of 24d PLTs */ 548 extern uint32_t pltcntu32; /* cnt of u32 PLTs */ 549 extern uint32_t pltcntu44; /* cnt of u44 PLTs */ 550 extern uint32_t pltcntfull; /* cnt of full PLTs */ 551 extern uint32_t pltcntfar; /* cnt of far PLTs */ 552 extern uchar_t search_rules[]; /* dependency search rules */ 553 554 extern Fct elf_fct; /* ELF file class dependent data */ 555 556 #if defined(__sparc) && !defined(__sparcv9) 557 extern Fct aout_fct; /* a.out (4.x) file class dependent */ 558 /* data */ 559 #endif 560 561 extern Config *config; /* configuration structure */ 562 extern const char *locale; /* locale environment setting */ 563 564 extern const char *rpl_audit; /* replaceable LD_AUDIT string */ 565 extern const char *rpl_debug; /* replaceable LD_DEBUG string */ 566 extern const char *rpl_ldflags; /* replaceable LD_FLAGS string */ 567 extern const char *rpl_libpath; /* replaceable LD_LIBRARY string */ 568 extern Alist *rpl_libdirs; /* and its associated Pdesc list */ 569 extern const char *rpl_preload; /* replaceable LD_PRELOAD string */ 570 571 extern const char *prm_audit; /* permanent LD_AUDIT string */ 572 extern const char *prm_debug; /* permanent LD_DEBUG string */ 573 extern const char *prm_ldflags; /* permanent LD_FLAGS string */ 574 extern const char *prm_libpath; /* permanent LD_LIBRARY string */ 575 extern Alist *prm_libdirs; /* and its associated Pdesc list */ 576 extern const char *prm_preload; /* permanent LD_PRELOAD string */ 577 578 extern Alist *elf_def_dirs; /* ELF default directory seach paths */ 579 extern Alist *elf_sec_dirs; /* ELF secure directory seach paths */ 580 extern Alist *aout_def_dirs; /* AOUT default directory seach paths */ 581 extern Alist *aout_sec_dirs; /* AOUT secure directory seach paths */ 582 583 extern uint_t env_info; /* information regarding environment */ 584 /* variables */ 585 extern int killsig; /* signal sent on fatal exit */ 586 extern APlist *free_alp; /* defragmentation list */ 587 588 extern uint_t audit_argcnt; /* no. of stack args to copy */ 589 extern Audit_desc *auditors; /* global auditors */ 590 591 extern char **_environ; /* environ reference for libc */ 592 593 extern const char *dbg_file; /* debugging directed to a file */ 594 595 extern Reglist *reglist; /* list of register symbols */ 596 597 extern const Msg err_reject[]; /* rejection error message tables */ 598 extern const Msg ldd_reject[]; 599 extern const Msg ldd_warn[]; 600 601 extern const char *profile_name; /* object being profiled */ 602 extern const char *profile_out; /* profile output file */ 603 extern const char *profile_lib; /* audit library to perform profile */ 604 605 extern Dl_argsinfo argsinfo; /* process argument, environment and */ 606 /* auxv information */ 607 608 extern const char *err_strs[ERR_NUM]; 609 /* diagnostic error string headers */ 610 extern const char *nosym_str; /* MSG_GEN_NOSYM message cache */ 611 612 extern Syscapset *org_scapset; /* original system capabilities */ 613 extern Syscapset *alt_scapset; /* alternative system capabilities */ 614 615 extern const char *rpl_hwcap; /* replaceable hwcap str */ 616 extern const char *rpl_sfcap; /* replaceable sfcap str */ 617 extern const char *rpl_machcap; /* replaceable machcap str */ 618 extern const char *rpl_platcap; /* replaceable platcap str */ 619 extern const char *rpl_cap_files; /* associated files */ 620 621 extern const char *prm_hwcap; /* permanent hwcap str */ 622 extern const char *prm_sfcap; /* permanent sfcap str */ 623 extern const char *prm_machcap; /* permanent machcap str */ 624 extern const char *prm_platcap; /* permanent platcap str */ 625 extern const char *prm_cap_files; /* associated files */ 626 627 extern avl_tree_t *capavl; /* capabilities files */ 628 extern avl_tree_t *nfavl; /* not-found path names */ 629 extern avl_tree_t *spavl; /* secure path names */ 630 631 extern u_longlong_t cnt_map; /* Incr. for each object mapped */ 632 extern u_longlong_t cnt_unmap; /* Incr. for each object unmapped */ 633 634 /* 635 * Function declarations. 636 */ 637 extern void addfree(void *, size_t); 638 extern int append_alias(Rt_map *, const char *, int *); 639 extern Rt_map *analyze_lmc(Lm_list *, Aliste, Rt_map *, int *); 640 extern void atexit_fini(void); 641 extern int bind_one(Rt_map *, Rt_map *, uint_t); 642 extern int bufprint(Prfbuf *, const char *, ...); 643 extern void call_array(Addr *, uint_t, Rt_map *, Word); 644 extern void call_fini(Lm_list *, Rt_map **); 645 extern void call_init(Rt_map **, int); 646 extern int callable(Rt_map *, Rt_map *, Grp_hdl *, uint_t); 647 extern Rt_map *_caller(caddr_t, int); 648 extern caddr_t caller(void); 649 extern void *calloc(size_t, size_t); 650 extern int cap_alternative(void); 651 extern int cap_check_fdesc(Fdesc *, Cap *, char *, Rej_desc *); 652 extern int cap_check_lmp(Rt_map *, Rej_desc *); 653 extern int cap_filtees(Alist **, Aliste, const char *, Aliste, 654 Rt_map *, const char *, int, uint_t, int *); 655 extern int cap_match(Sresult *, uint_t, Sym *, char *); 656 extern const char *_conv_reloc_type(uint_t rel); 657 extern Aliste create_cntl(Lm_list *, int); 658 extern void defrag(void); 659 extern int dbg_setup(const char *, Dbg_desc *); 660 extern const char *demangle(const char *); 661 extern int dlclose_intn(Grp_hdl *, Rt_map *); 662 extern int dlclose_core(Grp_hdl *, Rt_map *, Lm_list *); 663 extern int dlsym_handle(Grp_hdl *, Slookup *, Sresult *, uint_t *, 664 int *); 665 extern void *dlsym_intn(void *, const char *, Rt_map *, Rt_map **); 666 extern Grp_hdl *dlmopen_intn(Lm_list *, const char *, int, Rt_map *, 667 uint_t, uint_t); 668 extern size_t doprf(const char *, va_list, Prfbuf *); 669 extern int dowrite(Prfbuf *); 670 extern void *dz_map(Lm_list *, caddr_t, size_t, int, int); 671 extern int enter(int); 672 extern uint_t expand(char **, size_t *, char **, uint_t, uint_t, 673 Rt_map *); 674 extern int expand_paths(Rt_map *, const char *, Alist **, Aliste, 675 uint_t, uint_t); 676 extern void free_hdl(Grp_hdl *); 677 extern void file_notfound(Lm_list *, const char *, Rt_map *, 678 uint_t, Rej_desc *); 679 extern int find_path(Lm_list *, Rt_map *, uint_t, Fdesc *, 680 Rej_desc *, int *); 681 extern int fpavl_insert(Lm_list *, Rt_map *, const char *, 682 avl_index_t); 683 extern Rt_map *fpavl_recorded(Lm_list *, const char *, uint_t, 684 avl_index_t *); 685 extern void fpavl_remove(Rt_map *); 686 extern size_t fullpath(Rt_map *, Fdesc *); 687 extern Lmid_t get_linkmap_id(Lm_list *); 688 extern Pdesc *get_next_dir(Spath_desc *, Rt_map *, uint_t); 689 extern Grp_desc *hdl_add(Grp_hdl *, Rt_map *, uint_t, int *); 690 extern Grp_hdl *hdl_create(Lm_list *, Rt_map *, Rt_map *, uint_t, 691 uint_t, uint_t); 692 extern int hdl_initialize(Grp_hdl *, Rt_map *, int, int); 693 extern int hwcap1_check(Syscapset *, Xword, Rej_desc *); 694 extern int hwcap2_check(Syscapset *, Xword, Rej_desc *); 695 extern void is_dep_init(Rt_map *, Rt_map *); 696 extern int is_move_data(caddr_t); 697 extern int is_path_secure(char *, Rt_map *, uint_t, uint_t); 698 extern int is_rtld_setuid(); 699 extern int is_sym_interposer(Rt_map *, Sym *); 700 extern void ldso_plt_init(Rt_map *); 701 extern void leave(Lm_list *, int); 702 extern void lm_append(Lm_list *, Aliste, Rt_map *); 703 extern void lm_delete(Lm_list *, Rt_map *); 704 extern void lm_move(Lm_list *, Aliste, Aliste, Lm_cntl *, 705 Lm_cntl *); 706 extern Rt_map *load_cap(Lm_list *, Aliste, const char *, Rt_map *, 707 uint_t, uint_t, Grp_hdl **, Rej_desc *, int *); 708 extern void load_completion(Rt_map *); 709 extern Rt_map *load_file(Lm_list *, Aliste, Fdesc *, int *); 710 extern Rt_map *load_path(Lm_list *, Aliste, Rt_map *, int, uint_t, 711 Grp_hdl **, Fdesc *, Rej_desc *, int *); 712 extern Rt_map *load_one(Lm_list *, Aliste, Alist *, Rt_map *, int, 713 uint_t, Grp_hdl **, int *); 714 extern const char *load_trace(Lm_list *, Pdesc *, Rt_map *, Fdesc *); 715 extern void nfavl_insert(const char *, avl_index_t); 716 extern void *nu_map(Lm_list *, caddr_t, size_t, int, int); 717 extern Fct *map_obj(Lm_list *, Fdesc *, size_t, const char *, int, 718 Rej_desc *); 719 extern void *malloc(size_t); 720 extern int machcap_check(Syscapset *, const char *, Rej_desc *); 721 extern void machine_name(Syscapset *); 722 extern int move_data(Rt_map *, APlist **); 723 extern int platcap_check(Syscapset *, const char *, Rej_desc *); 724 extern void platform_name(Syscapset *); 725 extern int pnavl_recorded(avl_tree_t **, const char *, uint_t, 726 avl_index_t *); 727 extern int procenv_user(APlist *, Word *, Word *, int); 728 extern void rd_event(Lm_list *, rd_event_e, r_state_e); 729 extern int readenv_user(const char **, APlist **); 730 extern int readenv_config(Rtc_env *, Addr, int); 731 extern void rejection_inherit(Rej_desc *, Rej_desc *); 732 extern int relocate_lmc(Lm_list *, Aliste, Rt_map *, Rt_map *, 733 int *); 734 extern int relocate_finish(Rt_map *, APlist *, int); 735 extern void remove_cntl(Lm_list *, Aliste); 736 extern int remove_hdl(Grp_hdl *, Rt_map *, int *); 737 extern void remove_lmc(Lm_list *, Rt_map *, Aliste, const char *); 738 extern void remove_lml(Lm_list *); 739 extern void remove_plist(Alist **, int); 740 extern void remove_so(Lm_list *, Rt_map *); 741 extern int rt_cond_wait(Rt_cond *, Rt_lock *); 742 extern int rt_critical(void); 743 extern int rt_bind_guard(int); 744 extern int rt_bind_clear(int); 745 extern int rt_get_extern(Lm_list *, Rt_map *); 746 extern int rt_mutex_lock(Rt_lock *); 747 extern int rt_mutex_unlock(Rt_lock *); 748 extern void rt_thr_init(Lm_list *); 749 extern thread_t rt_thr_self(void); 750 extern void rtld_db_dlactivity(Lm_list *); 751 extern void rtld_db_preinit(Lm_list *); 752 extern void rtld_db_postinit(Lm_list *); 753 extern void rtldexit(Lm_list *, int); 754 #ifndef _LP64 755 extern int rtld_fstat(int, rtld_stat_t *restrict); 756 extern int rtld_stat(const char *restrict, rtld_stat_t *restrict); 757 #endif 758 extern int rtld_getopt(char **, char ***, auxv_t **, Word *, 759 Word *, int); 760 extern void security(uid_t, uid_t, gid_t, gid_t, int); 761 extern void set_environ(Lm_list *); 762 extern void set_dirs(Alist **, Spath_defn *, uint_t); 763 extern int set_prot(Rt_map *, mmapobj_result_t *, int); 764 extern Rt_map *setup(char **, auxv_t *, Word, char *, int, char *, 765 ulong_t, ulong_t, int fd, Phdr *, char *, char **, 766 uid_t, uid_t, gid_t, gid_t, void *, int, uint_t); 767 extern const char *stravl_insert(const char *, uint_t, size_t, int); 768 extern void spavl_insert(const char *); 769 extern int sfcap1_check(Syscapset *, Xword, Rej_desc *); 770 extern int tls_assign(Lm_list *, Rt_map *, Phdr *); 771 extern void tls_modaddrem(Rt_map *, uint_t); 772 extern int tls_statmod(Lm_list *, Rt_map *); 773 extern Rt_map **tsort(Rt_map *, int, int); 774 extern void unused(Lm_list *); 775 extern void unmap_obj(mmapobj_result_t *, uint_t); 776 extern int update_mode(Rt_map *, int, int); 777 extern void zero(caddr_t, size_t); 778 779 #if defined(__sparc) 780 /* 781 * SPARC Register symbol support. 782 */ 783 extern int elf_regsyms(Rt_map *); 784 extern void set_sparc_g1(ulong_t); 785 extern void set_sparc_g2(ulong_t); 786 extern void set_sparc_g3(ulong_t); 787 extern void set_sparc_g4(ulong_t); 788 extern void set_sparc_g5(ulong_t); 789 extern void set_sparc_g6(ulong_t); 790 extern void set_sparc_g7(ulong_t); 791 #endif 792 793 extern long _sysconfig(int); 794 795 #ifdef __cplusplus 796 } 797 #endif 798 799 #endif /* __RTLD_H */ 800