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 *, Rt_map *, 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 #define AL_CNT_COOKIES 2 /* head link-map list cookies */ 166 167 /* 168 * Size of buffer for building error messages. 169 */ 170 #define ERRSIZE 2048 /* MAXPATHLEN * 2 */ 171 172 /* 173 * Configuration file information. 174 */ 175 typedef struct config { 176 const char *c_name; 177 Addr c_bgn; 178 Addr c_end; 179 Word *c_hashtbl; 180 Word *c_hashchain; 181 const char *c_strtbl; 182 Rtc_obj *c_objtbl; 183 Rtc_fltr *c_fltr; 184 Rtc_flte *c_flte; 185 } Config; 186 187 /* 188 * Register symbol list. 189 */ 190 typedef struct reglist { 191 Rt_map *rl_lmp; /* defining object */ 192 Sym *rl_sym; /* regsym */ 193 struct reglist *rl_next; /* next entry */ 194 } Reglist; 195 196 /* 197 * Data structure to hold interpreter information. 198 */ 199 typedef struct interp { 200 char *i_name; /* interpreter name */ 201 caddr_t i_faddr; /* address interpreter is mapped at */ 202 } Interp; 203 204 /* 205 * Data structure used to keep track of copy relocations. These relocations 206 * are collected during initial relocation processing and maintained on the 207 * COPY(lmp) list of the defining object. Each copy list is also added to the 208 * COPY(lmp) of the head object (normally the application dynamic executable) 209 * from which they will be processed after all relocations are done. 210 * 211 * The use of RTLD_GROUP will also reference individual objects COPY(lmp) lists 212 * in case a bound symbol must be assigned to it actual copy relocation. 213 */ 214 typedef struct { 215 const char *r_name; /* symbol name */ 216 Sym *r_rsym; /* reference symbol table entry */ 217 Rt_map *r_rlmp; /* reference link map */ 218 Rt_map *r_dlmp; /* definition link map */ 219 Sym *r_dsym; /* definition symbol table entry */ 220 void *r_radd; /* copy to address */ 221 const void *r_dadd; /* copy from address */ 222 ulong_t r_size; /* copy size bytes */ 223 } Rel_copy; 224 225 /* 226 * Define a file descriptor, which maintains information regarding a pathname 227 * that has been opened and minimally inspected. 228 */ 229 struct fdesc { 230 Rt_map *fd_lmp; /* existing link-map pointer */ 231 Lm_list *fd_lml; /* callers link-map list */ 232 Fct *fd_ftp; /* file functions pointer */ 233 const char *fd_oname; /* original file name */ 234 const char *fd_odir; /* original directory name */ 235 const char *fd_nname; /* new file (expanded) name */ 236 const char *fd_pname; /* new path (resolved) name */ 237 dev_t fd_dev; /* file device number */ 238 rtld_ino_t fd_ino; /* file inode number */ 239 avl_index_t fd_avlwhere; /* avl tree insertion index */ 240 Syscapset fd_scapset; /* capabilities */ 241 mmapobj_result_t *fd_mapp; /* mapping pointer */ 242 uint_t fd_mapn; /* mapping number */ 243 uint_t fd_flags; 244 }; 245 246 #define FLG_FD_ALTER 0x0001 /* file is an alternate */ 247 #define FLG_FD_SLASH 0x0002 /* file contains a "/" */ 248 #define FLG_FD_RESOLVED 0x0004 /* fd_nname has been resolved */ 249 #define FLG_FD_ALTCHECK 0x0008 /* alternative system capabilities */ 250 /* checked */ 251 #define FLG_FD_ALTCAP 0x0010 /* alternative system capabilities */ 252 /* should be used */ 253 #define FLG_FD_IGNORE 0x0020 /* descriptor should be ignored */ 254 255 /* 256 * File descriptor availability flag. 257 */ 258 #define FD_UNAVAIL -1 259 260 /* 261 * Disabled filter flag. Filter objects are referenced using their .dynamic 262 * index (DT_FILTER or DT_AUXILIARY). This index is saved and used to lookup 263 * the required filter. Note that 0 is a valid .dynamic index. The caller's 264 * OBJFLTRNDX() element is initialized using the following flag, and should 265 * the filter's initialization fail, is reset to this value to indicate the 266 * filter is disabled. UINT_MAX provides a convenient invalid .dynamic index. 267 */ 268 #define FLTR_DISABLED UINT_MAX 269 270 /* 271 * Status flags for rtld_flags 272 */ 273 #define RT_FL_THREADS 0x00000001 /* threads are enabled */ 274 #define RT_FL_WARNFLTR 0x00000002 /* warn of missing filtees (ldd) */ 275 #define RT_FL_DBNOTIF 0x00000004 /* binding activity going on */ 276 #define RT_FL_DEFERRED 0x00000008 /* load deferred dependencies (ldd) */ 277 #define RT_FL_NOBIND 0x00000010 /* don't carry out plt binding */ 278 #define RT_FL_NOVERSION 0x00000020 /* disable version checking */ 279 #define RT_FL_SECURE 0x00000040 /* setuid/segid flag */ 280 #define RT_FL_APPLIC 0x00000080 /* executing application code */ 281 #define RT_FL_NOENVIRON 0x00000100 /* don't process environment */ 282 /* variables (ld.so.1 -e) */ 283 #define RT_FL_CONFGEN 0x00000200 /* don't relocate initiating object */ 284 /* set by crle(1) */ 285 #define RT_FL_CONFAPP 0x00000400 /* application specific configuration */ 286 /* cache required */ 287 #define RT_FL_DEBUGGER 0x00000800 /* a debugger is monitoring us */ 288 #define RT_FL_OPERATION 0x00001000 /* start recording operations */ 289 #define RT_FL_NEWLOCALE 0x00002000 /* message locale has changed */ 290 #define RT_FL_NOBAPLT 0x00004000 /* sparc: don't use ba plt's */ 291 #define RT_FL_NOAUXFLTR 0x00008000 /* disable auxiliary filters */ 292 293 #define RT_FL_NOAUDIT 0x00020000 /* disable auditing */ 294 #define RT_FL_ATEXIT 0x00040000 /* we're shutting down */ 295 #define RT_FL_SILENCERR 0x00080000 /* silence error messages */ 296 297 #define RT_FL_INITFIRST 0x00200000 /* processing a DT_INITFIRST object */ 298 299 #define RT_FL_DEMANGLE 0x01000000 /* demangle C++ symbol names */ 300 #define RT_FL_NOCFG 0x02000000 /* disable config file use */ 301 #define RT_FL_NODIRCFG 0x04000000 /* disable directory config use */ 302 #define RT_FL_NOOBJALT 0x08000000 /* disable object alternative use */ 303 #define RT_FL_NOENVCFG 0x10000000 /* disable config envars use */ 304 #define RT_FL_DIRCFG 0x20000000 /* directory config info available */ 305 #define RT_FL_OBJALT 0x40000000 /* object alternatives are available */ 306 #define RT_FL_MEMRESV 0x80000000 /* memory reservation established */ 307 308 /* 309 * Status flags for rtld_flags2 310 */ 311 #define RT_FL2_HASAUDIT 0x00000001 /* auditing lm_list is present */ 312 #define RT_FL2_RTLDSEEN 0x00000002 /* rtldinfo has been set */ 313 #define RT_FL2_UNIFPROC 0x00000004 /* libc/libthread unified environment */ 314 315 #define RT_FL2_NOFLTCFG 0x00000010 /* disable config filter use */ 316 #define RT_FL2_FLTCFG 0x00000020 /* filter config info available */ 317 #define RT_FL2_HWCAP 0x00000040 /* hardware capabilities available */ 318 #define RT_FL2_FTL2WARN 0x00000080 /* convert fatal to warning messages */ 319 #define RT_FL2_BINDNOW 0x00000100 /* LD_BIND_NOW in effect */ 320 #define RT_FL2_BINDLAZY 0x00000200 /* disable RTLD_NOW (and LD_BIND_NOW) */ 321 #define RT_FL2_PLMSETUP 0x00000400 /* primary link-map set up complete */ 322 #define RT_FL2_BRANDED 0x00000800 /* process is branded */ 323 #define RT_FL2_NOPLM 0x00001000 /* process has no primary link map */ 324 #define RT_FL2_SETUID 0x00002000 /* ld.so.1 is setuid root */ 325 #define RT_FL2_ADDR32 0x00004000 /* 32-bit address space requirement */ 326 327 /* 328 * Information flags for env_info. 329 */ 330 #define ENV_INF_PATHCFG 0x00000001 /* replaceable LD_LIBRARY_PATH */ 331 /* originates from configuration */ 332 /* file */ 333 #define ENV_INF_FLAGCFG 0x00000002 /* replaceable LD_FLAGS originates */ 334 /* from configuration file */ 335 336 /* 337 * RTLDINFO descriptor. 338 */ 339 typedef struct { 340 Rt_map *rti_lmp; /* RTLDINFO provider */ 341 Lc_interface *rti_info; /* RTLDINFO data */ 342 } Rti_desc; 343 344 /* 345 * Binding flags for the rt_bind_guard()/rt_bind_clear() routines. 346 * These are defined in usr/src/lib/libc/inc/libc_int.h in the 347 * latest version of the libc/rtld runtime interface (CI_V_FIVE). 348 */ 349 #if !defined(CI_V_FIVE) 350 #define THR_FLG_RTLD 0x00000001 /* rtldlock bind guard flag */ 351 #define THR_FLG_NOLOCK 0x00000000 /* no-op before CI_V_FIVE */ 352 #define THR_FLG_REENTER 0x00000000 /* no-op before CI_V_FIVE */ 353 #endif 354 355 #define ROUND(x, a) (((int)(x) + ((int)(a) - 1)) & ~((int)(a) - 1)) 356 357 /* 358 * Print buffer. 359 */ 360 typedef struct { 361 char *pr_buf; /* pointer to beginning of buffer */ 362 char *pr_cur; /* pointer to next free char in buffer */ 363 size_t pr_len; /* buffer size */ 364 int pr_fd; /* output fd */ 365 } Prfbuf; 366 367 /* 368 * Path name descriptor. Used to construct various path names such as search 369 * paths, dependency paths, filter paths etc. The pd_info element can be used 370 * to hold various pointers, like Grp_hdl, Rtc_obj, etc. 371 */ 372 struct pdesc { 373 const char *pd_pname; /* path name - may be expanded */ 374 const char *pd_oname; /* original name - unexpanded */ 375 void *pd_info; /* possible auxiliary information */ 376 size_t pd_plen; /* path name length */ 377 uint_t pd_flags; /* descriptor specific flags */ 378 }; 379 380 /* 381 * Path name descriptors are passed to expand_path() and expand(). These 382 * routines break down possible multiple path strings (separated with ":"), 383 * and perform any reserved token expansion. These routines are passed 384 * information that indicates the use of the path, for example, search paths, 385 * i.e., LD_LIBRARY_PATH, RPATHS, etc. are defined using la_objsearch() 386 * information (see LA_SER flags in link.h). This information is recorded in 387 * the pd_flags field for later use. 388 * 389 * Define expansion path tokens. These are used to prevent various expansions 390 * from occurring, and record those expansions that do. Any expansion 391 * information is also recorded in the pd_flags field, and thus is or'd 392 * together with any LA_SER flags. 393 */ 394 #define PD_TKN_ORIGIN 0x00001000 /* $ORIGIN expansion has occurred */ 395 #define PD_TKN_PLATFORM 0x00002000 /* $PLATFORM expansion has occurred */ 396 #define PD_TKN_OSNAME 0x00004000 /* $OSNAME expansion has occurred */ 397 #define PD_TKN_OSREL 0x00008000 /* $OSREL expansion has occurred */ 398 #define PD_TKN_ISALIST 0x00010000 /* $ISALIST expansion has occurred */ 399 #define PD_TKN_CAP 0x00020000 /* $CAPABILITY/$HWCAP expansion has */ 400 /* occurred */ 401 #define PD_TKN_MACHINE 0x00040000 /* $MACHINE expansion has occurred */ 402 #define PD_TKN_RESOLVED 0x00080000 /* resolvepath() expansion has */ 403 /* occurred */ 404 #define PD_MSK_EXPAND 0x000ff000 /* mask for all expansions */ 405 406 /* 407 * Define additional path information. These definitions extend the path 408 * information, and may be passed into expand_path(), or set internally, or 409 * inherited from expand(). These definitions are or'd together with any 410 * LA_SER_ flags and PD_TKN_ flags. 411 */ 412 #define PD_FLG_PNSLASH 0x00100000 /* pd_pname contains a slash */ 413 #define PD_FLG_DUPLICAT 0x00200000 /* path is a duplicate */ 414 #define PD_FLG_EXTLOAD 0x00400000 /* path defines extra loaded objects */ 415 /* (preload, audit etc.) */ 416 #define PD_FLG_UNIQUE 0x00800000 /* ensure path is unique */ 417 #define PD_FLG_USED 0x01000000 /* indicate that path is used */ 418 #define PD_FLG_FULLPATH 0x02000000 /* ensure path is a full path */ 419 420 #define PD_MSK_INHERIT 0x0ffff000 /* mask for pd_flags incorporation */ 421 422 /* 423 * Additional token expansion information. Although these flags may be set 424 * within a token data item return from expand(), they are masked off with 425 * PD_MSK_INHERIT prior to any expansion information being recorded in a path 426 * name descriptor for later diagnostics. 427 */ 428 #define TKN_NONE 0x00000001 /* no token expansion has occurred */ 429 #define TKN_DOTSLASH 0x00000002 /* path contains a "./" */ 430 431 /* 432 * dlopen() handle list size. 433 */ 434 #define HDLIST_SZ 101 /* prime no. for hashing */ 435 #define HDLIST_ORP 102 /* orphan handle list */ 436 437 /* 438 * Define a path name search descriptor. This "cookie" maintains state as 439 * search paths are processed with get_next_dir(). Note, the path list is an 440 * indirect pointer, as search paths can be reevaluated for secure applications 441 * to provide better error diagnostics. 442 */ 443 typedef struct { 444 uchar_t *sp_rule; /* present search rule */ 445 Alist **sp_dalpp; /* present path list within rule */ 446 Aliste sp_idx; /* present index within path list */ 447 } Spath_desc; 448 449 /* 450 * Define a path name definition descriptor. Used to maintain initial ELF and 451 * AOUT path name definitions. 452 */ 453 typedef struct { 454 const char *sd_name; /* path name */ 455 size_t sd_len; /* path name size */ 456 } Spath_defn; 457 458 /* 459 * Define _caller flags. 460 */ 461 #define CL_NONE 0 462 #define CL_EXECDEF 1 /* supply the executable as a default */ 463 /* if the caller can't be determined */ 464 465 /* 466 * Binding information flags. These flags are passed up from low level binding 467 * routines to indicate "additional" information, such as why a binding has been 468 * rejected. These flags use the same data element as is used to record any 469 * DBG_BINFO flags. The DBG_BINFO flags are used to define the final bindings 470 * information and are used to provide better binding diagnostics. 471 */ 472 #define BINFO_REJDIRECT 0x010000 /* reject a direct binding */ 473 #define BINFO_REJSINGLE 0x100000 /* reject a singleton binding */ 474 #define BINFO_REJGROUP 0x200000 /* reject a group binding */ 475 476 #define BINFO_MSK_TRYAGAIN 0xf00000 /* a mask of bindings that */ 477 /* should be retried */ 478 #define BINFO_MSK_REJECTED 0xff0000 /* a mask of bindings that */ 479 /* have been rejected */ 480 481 /* 482 * The 32-bit version of rtld uses special stat() wrapper functions 483 * that preserve the non-largefile semantics of stat()/fstat() while 484 * allowing for large inode values. The 64-bit rtld uses stat() directly. 485 */ 486 #ifdef _LP64 487 #define rtld_fstat fstat 488 #define rtld_stat stat 489 typedef struct stat rtld_stat_t; 490 #else 491 typedef struct { 492 dev_t st_dev; 493 rtld_ino_t st_ino; 494 mode_t st_mode; 495 uid_t st_uid; 496 off_t st_size; 497 timestruc_t st_mtim; 498 #ifdef sparc 499 blksize_t st_blksize; 500 #endif 501 } rtld_stat_t; 502 #endif 503 504 /* 505 * Some capabilities aux vector definitions have been removed over time. 506 * However, existing objects may define these capabilities. Establish 507 * capability masks that provide for deleting any removed capabilities, so 508 * that these capabilities are not used to validate the associated object. 509 * 510 * These masks are tightly coupled to the aux vector definitions in auxv_386.h 511 * and auxv_SPARC.h, however they are maintained here, as only ld.so.1 needs 512 * to remove these capabilities. These definitions also describe where the 513 * flags are associated and allow for providing multi-architecture definitions 514 * should they become necessary, without having to pollute global header files. 515 */ 516 #if defined(__x86) 517 #define AV_HW1_IGNORE (0x8000 | 0x2000) /* withdrawn MON and PAUSE */ 518 #else /* auxv_386.h flags */ 519 #define AV_HW1_IGNORE 0 520 #endif 521 522 /* 523 * Error messages generated by ld.so.1 can be written to two different places. 524 * During initial startup, messages are flushed to the stderr. Once ld.so.1 525 * has jumped to the application, messages are stored in an internal buffer for 526 * retrieval by dlerror(). Between these two conditions, events such as libc's 527 * callbacks, and calls to auditors, are effectively jumping to application 528 * code. These transitions from application code to ld.so.1 code are guarded by 529 * the following macros to ensure any error messages are directed to the 530 * appropriate output. The single argument, "f", is a local variable that 531 * can retain, and reinstate, the RT_FL_APPLIC flag of the global rtld_flags 532 * variable. 533 */ 534 #define APPLICATION_ENTER(f) \ 535 f = (rtld_flags & RT_FL_APPLIC) ? 0 : RT_FL_APPLIC; \ 536 rtld_flags |= f; 537 #define APPLICATION_RETURN(f) \ 538 rtld_flags &= ~f; 539 540 /* 541 * Data declarations. 542 */ 543 extern Lc_desc glcs[]; /* global external interfaces */ 544 545 extern Rt_lock rtldlock; /* rtld lock */ 546 extern int thr_flg_nolock; 547 extern int thr_flg_reenter; 548 549 extern APlist *dynlm_list; /* dynamic list of link-maps */ 550 extern char **environ; /* environ pointer */ 551 552 extern int dyn_plt_ent_size; /* Size of dynamic plt's */ 553 extern ulong_t at_flags; /* machine specific file flags */ 554 extern const char *procname; /* file name of executing process */ 555 extern Rtld_db_priv r_debug; /* debugging information */ 556 extern char *lasterr; /* string describing last error */ 557 extern Interp *interp; /* ELF executable interpreter info */ 558 extern const char *rtldname; /* name of the dynamic linker */ 559 extern APlist *hdl_alp[]; /* dlopen() handle list */ 560 extern size_t syspagsz; /* system page size */ 561 extern Isa_desc *isa; /* isalist descriptor */ 562 extern Uts_desc *uts; /* utsname descriptor */ 563 extern uint_t rtld_flags; /* status flags for RTLD */ 564 extern uint_t rtld_flags2; /* additional status flags for RTLD */ 565 extern uint32_t pltcnt21d; /* cnt of 21d PLTs */ 566 extern uint32_t pltcnt24d; /* cnt of 24d PLTs */ 567 extern uint32_t pltcntu32; /* cnt of u32 PLTs */ 568 extern uint32_t pltcntu44; /* cnt of u44 PLTs */ 569 extern uint32_t pltcntfull; /* cnt of full PLTs */ 570 extern uint32_t pltcntfar; /* cnt of far PLTs */ 571 extern uchar_t search_rules[]; /* dependency search rules */ 572 573 extern Fct elf_fct; /* ELF file class dependent data */ 574 575 #if defined(__sparc) && !defined(__sparcv9) 576 extern Fct aout_fct; /* a.out (4.x) file class dependent */ 577 /* data */ 578 #endif 579 580 extern Config *config; /* configuration structure */ 581 extern const char *locale; /* locale environment setting */ 582 583 extern const char *rpl_audit; /* replaceable LD_AUDIT string */ 584 extern const char *rpl_debug; /* replaceable LD_DEBUG string */ 585 extern const char *rpl_ldflags; /* replaceable LD_FLAGS string */ 586 extern const char *rpl_libpath; /* replaceable LD_LIBRARY string */ 587 extern Alist *rpl_libdirs; /* and its associated Pdesc list */ 588 extern const char *rpl_preload; /* replaceable LD_PRELOAD string */ 589 590 extern const char *prm_audit; /* permanent LD_AUDIT string */ 591 extern const char *prm_debug; /* permanent LD_DEBUG string */ 592 extern const char *prm_ldflags; /* permanent LD_FLAGS string */ 593 extern const char *prm_libpath; /* permanent LD_LIBRARY string */ 594 extern Alist *prm_libdirs; /* and its associated Pdesc list */ 595 extern const char *prm_preload; /* permanent LD_PRELOAD string */ 596 597 extern Alist *elf_def_dirs; /* ELF default directory seach paths */ 598 extern Alist *elf_sec_dirs; /* ELF secure directory seach paths */ 599 extern Alist *aout_def_dirs; /* AOUT default directory seach paths */ 600 extern Alist *aout_sec_dirs; /* AOUT secure directory seach paths */ 601 602 extern uint_t env_info; /* information regarding environment */ 603 /* variables */ 604 extern int killsig; /* signal sent on fatal exit */ 605 extern APlist *free_alp; /* defragmentation list */ 606 607 extern uint_t audit_argcnt; /* no. of stack args to copy */ 608 extern Audit_desc *auditors; /* global auditors */ 609 extern APlist *aud_preinit; /* list of objects defining local */ 610 extern APlist *aud_activity; /* preinit and activity auditors */ 611 612 extern char **_environ; /* environ reference for libc */ 613 614 extern const char *dbg_file; /* debugging directed to a file */ 615 616 extern Reglist *reglist; /* list of register symbols */ 617 618 extern const Msg err_reject[]; /* rejection error message tables */ 619 extern const Msg ldd_reject[]; 620 extern const Msg ldd_warn[]; 621 622 extern const char *profile_name; /* object being profiled */ 623 extern const char *profile_out; /* profile output file */ 624 extern const char *profile_lib; /* audit library to perform profile */ 625 626 extern Dl_argsinfo argsinfo; /* process argument, environment and */ 627 /* auxv information */ 628 629 extern const char *err_strs[ERR_NUM]; 630 /* diagnostic error string headers */ 631 extern const char *nosym_str; /* MSG_GEN_NOSYM message cache */ 632 633 extern Syscapset *org_scapset; /* original system capabilities */ 634 extern Syscapset *alt_scapset; /* alternative system capabilities */ 635 636 extern const char *rpl_hwcap; /* replaceable hwcap str */ 637 extern const char *rpl_sfcap; /* replaceable sfcap str */ 638 extern const char *rpl_machcap; /* replaceable machcap str */ 639 extern const char *rpl_platcap; /* replaceable platcap str */ 640 extern const char *rpl_cap_files; /* associated files */ 641 642 extern const char *prm_hwcap; /* permanent hwcap str */ 643 extern const char *prm_sfcap; /* permanent sfcap str */ 644 extern const char *prm_machcap; /* permanent machcap str */ 645 extern const char *prm_platcap; /* permanent platcap str */ 646 extern const char *prm_cap_files; /* associated files */ 647 648 extern avl_tree_t *capavl; /* capabilities files */ 649 extern avl_tree_t *nfavl; /* not-found path names */ 650 extern avl_tree_t *spavl; /* secure path names */ 651 652 extern u_longlong_t cnt_map; /* Incr. for each object mapped */ 653 extern u_longlong_t cnt_unmap; /* Incr. for each object unmapped */ 654 655 /* 656 * Function declarations. 657 */ 658 extern void addfree(void *, size_t); 659 extern int append_alias(Rt_map *, const char *, int *); 660 extern Rt_map *analyze_lmc(Lm_list *, Aliste, Rt_map *, Rt_map *, 661 int *); 662 extern void atexit_fini(void); 663 extern int bind_one(Rt_map *, Rt_map *, uint_t); 664 extern int bufprint(Prfbuf *, const char *, ...); 665 extern void call_array(Addr *, uint_t, Rt_map *, Word); 666 extern void call_fini(Lm_list *, Rt_map **, Rt_map *); 667 extern void call_init(Rt_map **, int); 668 extern int callable(Rt_map *, Rt_map *, Grp_hdl *, uint_t); 669 extern Rt_map *_caller(caddr_t, int); 670 extern caddr_t caller(void); 671 extern void *calloc(size_t, size_t); 672 extern int cap_alternative(void); 673 extern int cap_check_fdesc(Fdesc *, Cap *, char *, Rej_desc *); 674 extern int cap_check_lmp(Rt_map *, Rej_desc *); 675 extern int cap_filtees(Alist **, Aliste, const char *, Aliste, 676 Rt_map *, Rt_map *, const char *, int, uint_t, 677 int *); 678 extern int cap_match(Sresult *, uint_t, Sym *, char *); 679 extern const char *_conv_reloc_type(uint_t rel); 680 extern Aliste create_cntl(Lm_list *, int); 681 extern void defrag(void); 682 extern int dbg_setup(const char *, Dbg_desc *); 683 extern const char *demangle(const char *); 684 extern int dlclose_intn(Grp_hdl *, Rt_map *); 685 extern int dlclose_core(Grp_hdl *, Rt_map *, Lm_list *); 686 extern int dlsym_handle(Grp_hdl *, Slookup *, Sresult *, uint_t *, 687 int *); 688 extern void *dlsym_intn(void *, const char *, Rt_map *, Rt_map **); 689 extern Grp_hdl *dlmopen_intn(Lm_list *, const char *, int, Rt_map *, 690 uint_t, uint_t); 691 extern size_t doprf(const char *, va_list, Prfbuf *); 692 extern int dowrite(Prfbuf *); 693 extern void *dz_map(Lm_list *, caddr_t, size_t, int, int); 694 extern int enter(int); 695 extern uint_t expand(char **, size_t *, char **, uint_t, uint_t, 696 Rt_map *); 697 extern int expand_paths(Rt_map *, const char *, Alist **, Aliste, 698 uint_t, uint_t); 699 extern void free_hdl(Grp_hdl *); 700 extern void file_notfound(Lm_list *, const char *, Rt_map *, 701 uint_t, Rej_desc *); 702 extern int find_path(Lm_list *, Rt_map *, uint_t, Fdesc *, 703 Rej_desc *, int *); 704 extern int fpavl_insert(Lm_list *, Rt_map *, const char *, 705 avl_index_t); 706 extern Rt_map *fpavl_recorded(Lm_list *, const char *, uint_t, 707 avl_index_t *); 708 extern void fpavl_remove(Rt_map *); 709 extern size_t fullpath(Rt_map *, Fdesc *); 710 extern Lmid_t get_linkmap_id(Lm_list *); 711 extern Pdesc *get_next_dir(Spath_desc *, Rt_map *, uint_t); 712 extern Grp_desc *hdl_add(Grp_hdl *, Rt_map *, uint_t, int *); 713 extern Grp_hdl *hdl_create(Lm_list *, Rt_map *, Rt_map *, uint_t, 714 uint_t, uint_t); 715 extern int hdl_initialize(Grp_hdl *, Rt_map *, int, int); 716 extern int hwcap1_check(Syscapset *, Xword, Rej_desc *); 717 extern int hwcap2_check(Syscapset *, Xword, Rej_desc *); 718 extern void is_dep_init(Rt_map *, Rt_map *); 719 extern int is_move_data(caddr_t); 720 extern int is_path_secure(char *, Rt_map *, uint_t, uint_t); 721 extern int is_rtld_setuid(); 722 extern int is_sym_interposer(Rt_map *, Sym *); 723 extern void ldso_plt_init(Rt_map *); 724 extern void leave(Lm_list *, int); 725 extern void lm_append(Lm_list *, Aliste, Rt_map *); 726 extern void lm_delete(Lm_list *, Rt_map *, Rt_map *); 727 extern void lm_move(Lm_list *, Aliste, Aliste, Lm_cntl *, 728 Lm_cntl *); 729 extern Rt_map *load_cap(Lm_list *, Aliste, const char *, Rt_map *, 730 uint_t, uint_t, Grp_hdl **, Rej_desc *, int *); 731 extern void load_completion(Rt_map *); 732 extern Rt_map *load_file(Lm_list *, Aliste, Rt_map *, Fdesc *, int *); 733 extern Rt_map *load_path(Lm_list *, Aliste, Rt_map *, int, uint_t, 734 Grp_hdl **, Fdesc *, Rej_desc *, int *); 735 extern Rt_map *load_one(Lm_list *, Aliste, Alist *, Rt_map *, int, 736 uint_t, Grp_hdl **, int *); 737 extern const char *load_trace(Lm_list *, Pdesc *, Rt_map *, Fdesc *); 738 extern void nfavl_insert(const char *, avl_index_t); 739 extern void *nu_map(Lm_list *, caddr_t, size_t, int, int); 740 extern Fct *map_obj(Lm_list *, Fdesc *, size_t, const char *, int, 741 Rej_desc *); 742 extern void *malloc(size_t); 743 extern int machcap_check(Syscapset *, const char *, Rej_desc *); 744 extern void machine_name(Syscapset *); 745 extern int move_data(Rt_map *, APlist **); 746 extern int platcap_check(Syscapset *, const char *, Rej_desc *); 747 extern void platform_name(Syscapset *); 748 extern int pnavl_recorded(avl_tree_t **, const char *, uint_t, 749 avl_index_t *); 750 extern int procenv_user(APlist *, Word *, Word *, int); 751 extern void rd_event(Lm_list *, rd_event_e, r_state_e); 752 extern int readenv_user(const char **, APlist **); 753 extern int readenv_config(Rtc_env *, Addr, int); 754 extern void rejection_inherit(Rej_desc *, Rej_desc *); 755 extern int relocate_lmc(Lm_list *, Aliste, Rt_map *, Rt_map *, 756 int *); 757 extern int relocate_finish(Rt_map *, APlist *, int); 758 extern void remove_alist(Alist **, int); 759 extern void remove_cntl(Lm_list *, Aliste); 760 extern int remove_hdl(Grp_hdl *, Rt_map *, int *); 761 extern void remove_lmc(Lm_list *, Rt_map *, Aliste, const char *); 762 extern void remove_lml(Lm_list *); 763 extern void remove_so(Lm_list *, Rt_map *, Rt_map *); 764 extern int rt_cond_wait(Rt_cond *, Rt_lock *); 765 extern int rt_critical(void); 766 extern int rt_bind_guard(int); 767 extern int rt_bind_clear(int); 768 extern int rt_get_extern(Lm_list *, Rt_map *); 769 extern int rt_mutex_lock(Rt_lock *); 770 extern int rt_mutex_unlock(Rt_lock *); 771 extern void rt_thr_init(Lm_list *); 772 extern thread_t rt_thr_self(void); 773 extern void rtld_db_dlactivity(Lm_list *); 774 extern void rtld_db_preinit(Lm_list *); 775 extern void rtld_db_postinit(Lm_list *); 776 extern void rtldexit(Lm_list *, int); 777 #ifndef _LP64 778 extern int rtld_fstat(int, rtld_stat_t *restrict); 779 extern int rtld_stat(const char *restrict, rtld_stat_t *restrict); 780 #endif 781 extern int rtld_getopt(char **, char ***, auxv_t **, Word *, 782 Word *, int); 783 extern void security(uid_t, uid_t, gid_t, gid_t, int); 784 extern void set_environ(Lm_list *); 785 extern void set_dirs(Alist **, Spath_defn *, uint_t); 786 extern int set_prot(Rt_map *, mmapobj_result_t *, int); 787 extern Rt_map *setup(char **, auxv_t *, Word, char *, int, char *, 788 ulong_t, ulong_t, int fd, Phdr *, char *, char **, 789 uid_t, uid_t, gid_t, gid_t, void *, int, uint_t); 790 extern const char *stravl_insert(const char *, uint_t, size_t, int); 791 extern void spavl_insert(const char *); 792 extern int sfcap1_check(Syscapset *, Xword, Rej_desc *); 793 extern int tls_assign(Lm_list *, Rt_map *, Phdr *); 794 extern void tls_modaddrem(Rt_map *, uint_t); 795 extern int tls_statmod(Lm_list *, Rt_map *); 796 extern Rt_map **tsort(Rt_map *, int, int); 797 extern void unused(Lm_list *); 798 extern void unmap_obj(mmapobj_result_t *, uint_t); 799 extern int update_mode(Rt_map *, int, int); 800 extern void zero(caddr_t, size_t); 801 802 #if defined(__sparc) 803 /* 804 * SPARC Register symbol support. 805 */ 806 extern int elf_regsyms(Rt_map *); 807 extern void set_sparc_g1(ulong_t); 808 extern void set_sparc_g2(ulong_t); 809 extern void set_sparc_g3(ulong_t); 810 extern void set_sparc_g4(ulong_t); 811 extern void set_sparc_g5(ulong_t); 812 extern void set_sparc_g6(ulong_t); 813 extern void set_sparc_g7(ulong_t); 814 #endif 815 816 extern long _sysconfig(int); 817 818 #ifdef __cplusplus 819 } 820 #endif 821 822 #endif /* __RTLD_H */ 823