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 2009 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 #ifndef __RTLD_H 30 #define __RTLD_H 31 32 /* 33 * Common header for run-time linker. 34 */ 35 #include <sys/types.h> 36 #include <sys/stat.h> 37 #include <sys/avl.h> 38 #include <sys/mman.h> 39 #include <stdarg.h> 40 #include <synch.h> 41 #include <signal.h> 42 #include <errno.h> 43 #include <unistd.h> 44 #include <link.h> 45 #include <rtld.h> 46 #include <sgs.h> 47 #include <machdep.h> 48 #include <rtc.h> 49 #include <debug.h> 50 #include <msg.h> 51 #include <libc_int.h> 52 53 #ifdef __cplusplus 54 extern "C" { 55 #endif 56 57 /* 58 * Dependency search rule order. 59 */ 60 #define RPLENV 1 /* replaceable LD_LIBRARY_PATH */ 61 #define PRMENV 2 /* permanent LD_LIBRARY_PATH */ 62 #define RUNPATH 3 /* callers runpath */ 63 #define DEFAULT 4 /* default library path */ 64 65 typedef struct fdesc Fdesc; 66 typedef struct fct Fct; 67 typedef struct pdesc Pdesc; 68 69 /* 70 * Data structure for file class specific functions and data. 71 */ 72 struct fct { 73 /* Verify that the object is of this class. */ 74 Fct *(*fct_verify_file)(caddr_t, size_t, Fdesc *, const char *, 75 Rej_desc *); 76 77 /* Generate a link-map to describe the loaded object. */ 78 Rt_map *(*fct_new_lmp)(Lm_list *, Aliste, Fdesc *, Addr, size_t, 79 void *, int *); 80 81 /* Retrieve the entry point of the object. */ 82 Addr (*fct_entry_pt)(void); 83 84 /* Determine the objects dependencies (needed entries). */ 85 int (*fct_needed)(Lm_list *, Aliste, Rt_map *, int *); 86 87 /* Look up a symbol for the object. */ 88 Sym *(*fct_lookup_sym)(Slookup *, Rt_map **, uint_t *, int *); 89 90 /* Relocate the object. */ 91 int (*fct_reloc)(Rt_map *, uint_t, int *, APlist **); 92 93 /* List of default directories to search for dependencies. */ 94 Alist **(*fct_get_def_dirs)(void); 95 96 /* List of secure directories to search for dependencies. */ 97 Alist **(*fct_get_sec_dirs)(void); 98 99 /* Transpose the name of the object. */ 100 int (*fct_fix_name)(const char *, Rt_map *, Alist **, Aliste, 101 uint_t); 102 103 /* Get a shared object name */ 104 char *(*fct_get_so)(const char *, const char *, size_t, size_t); 105 106 /* Retrieve a symbolic address from the object. */ 107 void (*fct_dladdr)(ulong_t, Rt_map *, Dl_info *, void **, int); 108 109 /* Process a dlsym(3c) request within the object. */ 110 Sym *(*fct_dlsym)(Grp_hdl *, Slookup *, Rt_map **, uint_t *, 111 int *); 112 }; 113 114 /* 115 * Macros for getting to the file class table. 116 */ 117 #define LM_ENTRY_PT(X) ((X)->rt_fct->fct_entry_pt) 118 #define LM_NEEDED(X) ((X)->rt_fct->fct_needed) 119 #define LM_LOOKUP_SYM(X) ((X)->rt_fct->fct_lookup_sym) 120 #define LM_RELOC(X) ((X)->rt_fct->fct_reloc) 121 #define LM_DEFAULT_DIRS(X) ((X)->rt_fct->fct_get_def_dirs) 122 #define LM_SECURE_DIRS(X) ((X)->rt_fct->fct_get_sec_dirs) 123 #define LM_FIX_NAME(X) ((X)->rt_fct->fct_fix_name) 124 #define LM_GET_SO(X) ((X)->rt_fct->fct_get_so) 125 #define LM_DLADDR(X) ((X)->rt_fct->fct_dladdr) 126 #define LM_DLSYM(X) ((X)->rt_fct->fct_dlsym) 127 128 /* 129 * Initial memory map allocation. Typical ELF objects contain a text and data 130 * segment, which can be augmented with a bss mapping. Add a bunch more for 131 * luck. 132 */ 133 #define MMAPFD_NUM 10 134 135 /* 136 * Define Alist initialization counts. 137 */ 138 #define AL_CNT_ALIAS 2 /* ALIAS() */ 139 #define AL_CNT_DEPENDS 20 /* DEPENDS() */ 140 #define AL_CNT_CALLERS 20 /* CALLERS() */ 141 #define AL_CNT_GROUPS 4 /* GROUPS() */ 142 #define AL_CNT_COPYREL 10 /* COPY() */ 143 #define AL_CNT_LAZYFIND 10 /* elf_lazy_find_sym() */ 144 #define AL_CNT_GRPCLCT 10 /* gdp_collect() */ 145 #define AL_CNT_DEPCLCT 10 /* load_finish() */ 146 #define AL_CNT_RTLDINFO 1 /* RTLDINFO() */ 147 #define AL_CNT_FPNODE 4 /* FPNODE() */ 148 #define AL_CNT_LMLISTS 20 /* lm_lists */ 149 #define AL_CNT_LMNOW 8 /* lm_now */ 150 #define AL_CNT_RELBIND 20 /* relocation binding */ 151 #define AL_CNT_ACTAUDIT 2 /* lm_actaudit */ 152 #define AL_CNT_MOVES 10 /* move_data */ 153 #define AL_CNT_MPOBJS 4 /* elf_obj_file() */ 154 #define AL_CNT_TEXTREL 2 /* text relocation segment */ 155 #define AL_CNT_NEEDED 1 /* dependency path */ 156 #define AL_CNT_SEARCH 4 /* search path */ 157 #define AL_CNT_FILTEES 2 /* filtee path */ 158 #define AL_CNT_HANDLES 1 /* hdl_list[] */ 159 #define AL_CNT_FREELIST 80 /* free_alp */ 160 #define AL_CNT_HWCAP 10 /* hwcap candidate */ 161 #define AL_CNT_SPATH 4 /* search path */ 162 #define AL_CNT_DYNLIST 2 /* dynlm_list */ 163 #define AL_CNT_PENDING 2 /* pending tsort list (INITFIRST) */ 164 #define AL_CNT_PLTPAD 10 /* plt padding */ 165 #define AL_CNT_AUDITORS 2 /* auditing list */ 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 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 uint_t fd_flags; 239 avl_index_t fd_avlwhere; /* avl tree insertion index */ 240 Xword fd_hwcap; /* hardware capabilities value */ 241 mmapobj_result_t *fd_mapp; /* mapping pointer */ 242 uint_t fd_mapn; /* mapping number */ 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 */ 248 249 /* 250 * File descriptor availability flag. 251 */ 252 #define FD_UNAVAIL -1 253 254 /* 255 * Disabled filter flag. Filter objects are referenced using their .dynamic 256 * index (DT_FILTER or DT_AUXILIARY). This index is saved and used to lookup 257 * the required filter. Note that 0 is a valid .dynamic index. The caller's 258 * OBJFLTRNDX() element is initialized using the following flag, and should 259 * the filter's initialization fail, is reset to this value to indicate the 260 * filter is disabled. UINT_MAX provides a convenient invalid .dynamic index. 261 */ 262 #define FLTR_DISABLED UINT_MAX 263 264 /* 265 * Status flags for rtld_flags 266 */ 267 #define RT_FL_THREADS 0x00000001 /* threads are enabled */ 268 #define RT_FL_WARNFLTR 0x00000002 /* warn of missing filtees (ldd) */ 269 #define RT_FL_DBNOTIF 0x00000004 /* binding activity going on */ 270 271 #define RT_FL_NOBIND 0x00000010 /* don't carry out plt binding */ 272 #define RT_FL_NOVERSION 0x00000020 /* disable version checking */ 273 #define RT_FL_SECURE 0x00000040 /* setuid/segid flag */ 274 #define RT_FL_APPLIC 0x00000080 /* are we executing user code */ 275 276 #define RT_FL_CONFGEN 0x00000200 /* don't relocate initiating object */ 277 /* set by crle(1). */ 278 #define RT_FL_CONFAPP 0x00000400 /* application specific configuration */ 279 /* cache required */ 280 #define RT_FL_DEBUGGER 0x00000800 /* a debugger is monitoring us */ 281 #define RT_FL_OPERATION 0x00001000 /* start recording operations */ 282 #define RT_FL_NEWLOCALE 0x00002000 /* message locale has changed */ 283 #define RT_FL_NOBAPLT 0x00004000 /* sparc: don't use ba plt's */ 284 #define RT_FL_NOAUXFLTR 0x00008000 /* disable auxiliary filters */ 285 286 #define RT_FL_NOAUDIT 0x00020000 /* disable auditing */ 287 #define RT_FL_ATEXIT 0x00040000 /* we're shutting down */ 288 #define RT_FL_SILENCERR 0x00080000 /* silence error messages */ 289 290 #define RT_FL_INITFIRST 0x00200000 /* processing a DT_INITFIRST object */ 291 292 #define RT_FL_DEMANGLE 0x01000000 /* demangle C++ symbol names */ 293 #define RT_FL_NOCFG 0x02000000 /* disable config file use */ 294 #define RT_FL_NODIRCFG 0x04000000 /* disable directory config use */ 295 #define RT_FL_NOOBJALT 0x08000000 /* disable object alternative use */ 296 #define RT_FL_NOENVCFG 0x10000000 /* disable config envars use */ 297 #define RT_FL_DIRCFG 0x20000000 /* directory config info available */ 298 #define RT_FL_OBJALT 0x40000000 /* object alternatives are available */ 299 #define RT_FL_MEMRESV 0x80000000 /* memory reservation established */ 300 301 /* 302 * Status flags for rtld_flags2 303 */ 304 #define RT_FL2_HASAUDIT 0x00000001 /* auditing lm_list is present */ 305 #define RT_FL2_RTLDSEEN 0x00000002 /* rtldinfo has been set */ 306 #define RT_FL2_UNIFPROC 0x00000004 /* libc/libthread unified environment */ 307 308 #define RT_FL2_NOFLTCFG 0x00000010 /* disable config filter use */ 309 #define RT_FL2_FLTCFG 0x00000020 /* filter config info available */ 310 #define RT_FL2_HWCAP 0x00000040 /* hardware capabilities available */ 311 #define RT_FL2_FTL2WARN 0x00000080 /* convert fatal to warning messages */ 312 #define RT_FL2_BINDNOW 0x00000100 /* LD_BIND_NOW in effect */ 313 #define RT_FL2_BINDLAZY 0x00000200 /* disable RTLD_NOW (and LD_BIND_NOW) */ 314 #define RT_FL2_PLMSETUP 0x00000400 /* primary link-map set up complete */ 315 #define RT_FL2_BRANDED 0x00000800 /* process is branded */ 316 #define RT_FL2_NOPLM 0x00001000 /* process has no primary link map */ 317 #define RT_FL2_SETUID 0x00002000 /* ld.so.1 is setuid root */ 318 #define RT_FL2_ADDR32 0x00004000 /* 32-bit address space requirement */ 319 320 /* 321 * Information flags for env_info. 322 */ 323 #define ENV_INF_PATHCFG 0x00000001 /* replaceable LD_LIBRARY_PATH */ 324 /* originates from configuration */ 325 /* file */ 326 #define ENV_INF_FLAGCFG 0x00000002 /* replaceable LD_FLAGS originates */ 327 /* from configuration file */ 328 329 /* 330 * RTLDINFO descriptor. 331 */ 332 typedef struct { 333 Rt_map *rti_lmp; /* RTLDINFO provider */ 334 Lc_interface *rti_info; /* RTLDINFO data */ 335 } Rti_desc; 336 337 /* 338 * Binding flags for the rt_bind_guard()/rt_bind_clear() routines. 339 * These are defined in usr/src/lib/libc/inc/libc_int.h in the 340 * latest version of the libc/rtld runtime interface (CI_V_FIVE). 341 */ 342 #if !defined(CI_V_FIVE) 343 #define THR_FLG_RTLD 0x00000001 /* rtldlock bind guard flag */ 344 #define THR_FLG_NOLOCK 0x00000000 /* no-op before CI_V_FIVE */ 345 #define THR_FLG_REENTER 0x00000000 /* no-op before CI_V_FIVE */ 346 #endif 347 348 #define ROUND(x, a) (((int)(x) + ((int)(a) - 1)) & ~((int)(a) - 1)) 349 350 /* 351 * Print buffer. 352 */ 353 typedef struct { 354 char *pr_buf; /* pointer to beginning of buffer */ 355 char *pr_cur; /* pointer to next free char in buffer */ 356 size_t pr_len; /* buffer size */ 357 int pr_fd; /* output fd */ 358 } Prfbuf; 359 360 /* 361 * Path name descriptor. Used to construct various path names such as search 362 * paths, dependency paths, filter paths etc. The pd_info element can be used 363 * to hold various pointers, like Grp_hdl, Rtc_obj, etc. 364 */ 365 struct pdesc { 366 const char *pd_pname; /* path name - may be expanded */ 367 const char *pd_oname; /* original name - unexpanded */ 368 void *pd_info; /* possible auxiliary information */ 369 size_t pd_plen; /* path name length */ 370 uint_t pd_flags; /* descriptor specific flags */ 371 }; 372 373 /* 374 * Path name descriptors are passed to expand_path() and expand(). These 375 * routines break down possible multiple path strings (separated with ":"), 376 * and perform any reserved token expansion. These routines are passed 377 * information that indicates the use of the path, for example, search paths, 378 * i.e., LD_LIBRARY_PATH, RPATHS, etc. are defined using la_objsearch() 379 * information (see LA_SER flags in link.h). This information is recorded in 380 * the pd_flags field for later use. 381 * 382 * Define expansion path tokens. These are used to prevent various expansions 383 * from occurring, and record those expansions that do. Any expansion 384 * information is also recorded in the pd_flags field, and thus is or'd 385 * together with any LA_SER flags. 386 */ 387 #define PD_TKN_ORIGIN 0x00001000 /* $ORIGIN expansion has occurred */ 388 #define PD_TKN_PLATFORM 0x00002000 /* $PLATFORM expansion has occurred */ 389 #define PD_TKN_OSNAME 0x00004000 /* $OSNAME expansion has occurred */ 390 #define PD_TKN_OSREL 0x00008000 /* $OSREL expansion has occurred */ 391 #define PD_TKN_ISALIST 0x00010000 /* $ISALIST expansion has occurred */ 392 #define PD_TKN_HWCAP 0x00020000 /* $HWCAP expansion has occurred */ 393 #define PD_TKN_RESOLVED 0x00040000 /* resolvepath() expansion has */ 394 /* occurred */ 395 #define PD_MSK_EXPAND 0x000ff000 /* mask for all expansions */ 396 397 /* 398 * Define additional path information. These definitions extend the path 399 * information, and may be passed into expand_path(), or set internally, or 400 * inherited from expand(). These definitions are or'd together with any 401 * LA_SER_ flags and PD_TKN_ flags. 402 */ 403 #define PD_FLG_PNSLASH 0x00100000 /* pd_pname contains a slash */ 404 #define PD_FLG_DUPLICAT 0x00200000 /* path is a duplicate */ 405 #define PD_FLG_EXTLOAD 0x00400000 /* path defines extra loaded objects */ 406 /* (preload, audit etc.) */ 407 #define PD_FLG_UNIQUE 0x00800000 /* ensure path is unique */ 408 #define PD_FLG_USED 0x01000000 /* indicate that path is used */ 409 #define PD_FLG_FULLPATH 0x02000000 /* ensure path is a full path */ 410 411 #define PD_MSK_INHERIT 0x0ffff000 /* mask for pd_flags incorporation */ 412 413 /* 414 * Additional token expansion information. Although these flags may be set 415 * within a token data item return from expand(), they are masked off with 416 * PD_MSK_INHERIT prior to any expansion information being recorded in a path 417 * name descriptor for later diagnostics. 418 */ 419 #define TKN_NONE 0x00000001 /* no token expansion has occurred */ 420 #define TKN_DOTSLASH 0x00000002 /* path contains a "./" */ 421 422 /* 423 * dlopen() handle list size. 424 */ 425 #define HDLIST_SZ 101 /* prime no. for hashing */ 426 #define HDLIST_ORP 102 /* orphan handle list */ 427 428 /* 429 * Define a path name search descriptor. This "cookie" maintains state as 430 * search paths are processed with get_next_dir(). Note, the path list is an 431 * indirect pointer, as search paths can be reevaluated for secure applications 432 * to provide better error diagnostics. 433 */ 434 typedef struct { 435 uchar_t *sp_rule; /* present search rule */ 436 Alist **sp_dalpp; /* present path list within rule */ 437 Aliste sp_idx; /* present index within path list */ 438 } Spath_desc; 439 440 /* 441 * Define a path name definition descriptor. Used to maintain initial ELF and 442 * AOUT path name definitions. 443 */ 444 typedef struct { 445 const char *sd_name; /* path name */ 446 size_t sd_len; /* path name size */ 447 } Spath_defn; 448 449 /* 450 * Define _caller flags. 451 */ 452 #define CL_NONE 0 453 #define CL_EXECDEF 1 /* supply the executable as a default */ 454 /* if the caller can't be determined */ 455 456 /* 457 * Binding information flags. These flags are passed up from low level binding 458 * routines to indicate "additional" information, such as why a binding has been 459 * rejected. These flags use the same data element as is used to record any 460 * DBG_BINFO flags. The DBG_BINFO flags are used to define the final bindings 461 * information and are used to provide better binding diagnostics. 462 */ 463 #define BINFO_REJDIRECT 0x010000 /* reject a direct binding */ 464 #define BINFO_REJSINGLE 0x100000 /* reject a singleton binding */ 465 #define BINFO_REJGROUP 0x200000 /* reject a group binding */ 466 467 #define BINFO_MSK_TRYAGAIN 0xf00000 /* a mask of bindings that */ 468 /* should be retried */ 469 #define BINFO_MSK_REJECTED 0xff0000 /* a mask of bindings that */ 470 /* have been rejected */ 471 472 /* 473 * The 32-bit version of rtld uses special stat() wrapper functions 474 * that preserve the non-largefile semantics of stat()/fstat() while 475 * allowing for large inode values. The 64-bit rtld uses stat() directly. 476 */ 477 #ifdef _LP64 478 #define rtld_fstat fstat 479 #define rtld_stat stat 480 typedef struct stat rtld_stat_t; 481 #else 482 typedef struct { 483 dev_t st_dev; 484 rtld_ino_t st_ino; 485 mode_t st_mode; 486 uid_t st_uid; 487 off_t st_size; 488 timestruc_t st_mtim; 489 #ifdef sparc 490 blksize_t st_blksize; 491 #endif 492 } rtld_stat_t; 493 #endif 494 495 496 /* 497 * Data declarations. 498 */ 499 extern Lc_desc glcs[]; /* global external interfaces */ 500 501 extern Rt_lock rtldlock; /* rtld lock */ 502 extern int thr_flg_nolock; 503 extern int thr_flg_reenter; 504 505 extern APlist *dynlm_list; /* dynamic list of link-maps */ 506 extern char **environ; /* environ pointer */ 507 508 extern int dyn_plt_ent_size; /* Size of dynamic plt's */ 509 extern ulong_t at_flags; /* machine specific file flags */ 510 extern const char *procname; /* file name of executing process */ 511 extern Rtld_db_priv r_debug; /* debugging information */ 512 extern char *lasterr; /* string describing last error */ 513 extern Interp *interp; /* ELF executable interpreter info */ 514 extern const char *rtldname; /* name of the dynamic linker */ 515 extern APlist *hdl_alp[]; /* dlopen() handle list */ 516 extern size_t syspagsz; /* system page size */ 517 extern char *platform; /* platform name */ 518 extern size_t platform_sz; /* platform name string size */ 519 extern Isa_desc *isa; /* isalist descriptor */ 520 extern Uts_desc *uts; /* utsname descriptor */ 521 extern uint_t rtld_flags; /* status flags for RTLD */ 522 extern uint_t rtld_flags2; /* additional status flags for RTLD */ 523 extern uint32_t pltcnt21d; /* cnt of 21d PLTs */ 524 extern uint32_t pltcnt24d; /* cnt of 24d PLTs */ 525 extern uint32_t pltcntu32; /* cnt of u32 PLTs */ 526 extern uint32_t pltcntu44; /* cnt of u44 PLTs */ 527 extern uint32_t pltcntfull; /* cnt of full PLTs */ 528 extern uint32_t pltcntfar; /* cnt of far PLTs */ 529 extern uchar_t search_rules[]; /* dependency search rules */ 530 531 extern Fct elf_fct; /* ELF file class dependent data */ 532 533 #if defined(__sparc) && !defined(__sparcv9) 534 extern Fct aout_fct; /* a.out (4.x) file class dependent */ 535 /* data */ 536 #endif 537 538 extern const char *locale; /* locale environment setting */ 539 540 extern Config *config; /* configuration structure */ 541 extern const char *locale; /* locale environment setting */ 542 543 extern const char *rpl_audit; /* replaceable LD_AUDIT string */ 544 extern const char *rpl_debug; /* replaceable LD_DEBUG string */ 545 extern const char *rpl_ldflags; /* replaceable LD_FLAGS string */ 546 extern const char *rpl_libpath; /* replaceable LD_LIBRARY string */ 547 extern Alist *rpl_libdirs; /* and its associated Pdesc list */ 548 extern const char *rpl_preload; /* replaceable LD_PRELOAD string */ 549 550 extern const char *prm_audit; /* permanent LD_AUDIT string */ 551 extern const char *prm_debug; /* permanent LD_DEBUG string */ 552 extern const char *prm_ldflags; /* permanent LD_FLAGS string */ 553 extern const char *prm_libpath; /* permanent LD_LIBRARY string */ 554 extern Alist *prm_libdirs; /* and its associated Pdesc list */ 555 extern const char *prm_preload; /* permanent LD_PRELOAD string */ 556 557 extern Alist *elf_def_dirs; /* ELF default directory seach paths */ 558 extern Alist *elf_sec_dirs; /* ELF secure directory seach paths */ 559 extern Alist *aout_def_dirs; /* AOUT default directory seach paths */ 560 extern Alist *aout_sec_dirs; /* AOUT secure directory seach paths */ 561 562 extern uint_t env_info; /* information regarding environment */ 563 /* variables */ 564 extern int killsig; /* signal sent on fatal exit */ 565 extern APlist *free_alp; /* defragmentation list */ 566 567 extern uint_t audit_argcnt; /* no. of stack args to copy */ 568 extern Audit_desc *auditors; /* global auditors */ 569 570 extern char **_environ; 571 572 extern const char *dbg_file; /* debugging directed to a file */ 573 574 extern Reglist *reglist; /* list of register symbols */ 575 576 extern const Msg err_reject[]; /* rejection error message tables */ 577 extern const Msg ldd_reject[]; 578 579 extern const char *profile_name; /* object being profiled */ 580 extern const char *profile_out; /* profile output file */ 581 extern const char *profile_lib; /* audit library to perform profile */ 582 583 extern Dl_argsinfo argsinfo; /* process argument, environment and */ 584 /* auxv information */ 585 586 extern const char *err_strs[ERR_NUM]; 587 /* diagnostic error string headers */ 588 extern const char *nosym_str; /* MSG_GEN_NOSYM message cache */ 589 590 extern ulong_t hwcap; /* hardware capabilities */ 591 extern ulong_t sfcap; /* software capabilities */ 592 593 extern avl_tree_t *nfavl; /* not-found AVL path name tree */ 594 595 /* 596 * Function declarations. 597 */ 598 extern void addfree(void *, size_t); 599 extern int append_alias(Rt_map *, const char *, int *); 600 extern Rt_map *analyze_lmc(Lm_list *, Aliste, Rt_map *, int *); 601 extern void atexit_fini(void); 602 extern int bind_one(Rt_map *, Rt_map *, uint_t); 603 extern int bufprint(Prfbuf *, const char *, ...); 604 extern void call_array(Addr *, uint_t, Rt_map *, Word); 605 extern void call_fini(Lm_list *, Rt_map **); 606 extern void call_init(Rt_map **, int); 607 extern int callable(Rt_map *, Rt_map *, Grp_hdl *, uint_t); 608 extern Rt_map *_caller(caddr_t, int); 609 extern caddr_t caller(void); 610 extern void *calloc(size_t, size_t); 611 extern void cap_assign(Cap *, Rt_map *); 612 extern const char *_conv_reloc_type(uint_t rel); 613 extern Aliste create_cntl(Lm_list *, int); 614 extern void defrag(void); 615 extern int dbg_setup(const char *, Dbg_desc *); 616 extern const char *demangle(const char *); 617 extern int dlclose_intn(Grp_hdl *, Rt_map *); 618 extern int dlclose_core(Grp_hdl *, Rt_map *, Lm_list *); 619 extern Sym *dlsym_handle(Grp_hdl *, Slookup *, Rt_map **, 620 uint_t *, int *); 621 extern void *dlsym_intn(void *, const char *, Rt_map *, Rt_map **); 622 extern Grp_hdl *dlmopen_intn(Lm_list *, const char *, int, Rt_map *, 623 uint_t, uint_t); 624 extern size_t doprf(const char *, va_list, Prfbuf *); 625 extern int dowrite(Prfbuf *); 626 extern void *dz_map(Lm_list *, caddr_t, size_t, int, int); 627 extern int enter(int); 628 extern uint_t expand(char **, size_t *, char **, uint_t, uint_t, 629 Rt_map *); 630 extern int expand_paths(Rt_map *, const char *, Alist **, Aliste, 631 uint_t, uint_t); 632 extern void free_hdl(Grp_hdl *, Rt_map *, uint_t); 633 extern void file_notfound(Lm_list *, const char *, Rt_map *, 634 uint_t, Rej_desc *); 635 extern int find_path(Lm_list *, Rt_map *, uint_t, Fdesc *, 636 Rej_desc *, int *); 637 extern int fpavl_insert(Lm_list *, Rt_map *, const char *, 638 avl_index_t); 639 extern Rt_map *fpavl_recorded(Lm_list *, const char *, uint_t, 640 avl_index_t *); 641 extern void fpavl_remove(Rt_map *); 642 extern size_t fullpath(Rt_map *, Fdesc *); 643 extern Lmid_t get_linkmap_id(Lm_list *); 644 extern Pdesc *get_next_dir(Spath_desc *, Rt_map *, uint_t); 645 extern int hdl_add(Grp_hdl *, Rt_map *, uint_t); 646 extern Grp_hdl *hdl_create(Lm_list *, Rt_map *, Rt_map *, uint_t, 647 uint_t, uint_t); 648 extern int hdl_initialize(Grp_hdl *, Rt_map *, int, int); 649 extern int hwcap_check(Xword, Rej_desc *); 650 extern int hwcap_filtees(Alist **, Aliste, const char *, Aliste, 651 Rt_map *, const char *, int, uint_t, int *); 652 extern void is_dep_init(Rt_map *, Rt_map *); 653 extern int is_move_data(caddr_t); 654 extern int is_path_secure(char *, Rt_map *, uint_t, uint_t); 655 extern int is_rtld_setuid(); 656 extern int is_sym_interposer(Rt_map *, Sym *); 657 extern void ldso_plt_init(Rt_map *); 658 extern void leave(Lm_list *, int); 659 extern void lm_append(Lm_list *, Aliste, Rt_map *); 660 extern void lm_delete(Lm_list *, Rt_map *); 661 extern void lm_move(Lm_list *, Aliste, Aliste, Lm_cntl *, 662 Lm_cntl *); 663 extern void load_completion(Rt_map *); 664 extern Rt_map *load_file(Lm_list *, Aliste, Fdesc *, int *); 665 extern Rt_map *load_hwcap(Lm_list *, Aliste, const char *, Rt_map *, 666 uint_t, uint_t, Grp_hdl **, Rej_desc *, int *); 667 extern Rt_map *load_path(Lm_list *, Aliste, Rt_map *, int, uint_t, 668 Grp_hdl **, Fdesc *, Rej_desc *, int *); 669 extern Rt_map *load_one(Lm_list *, Aliste, Alist *, Rt_map *, int, 670 uint_t, Grp_hdl **, int *); 671 extern const char *load_trace(Lm_list *, Pdesc *, Rt_map *, Fdesc *); 672 extern void nfavl_insert(const char *, avl_index_t); 673 extern int nfavl_recorded(const char *, uint_t, avl_index_t *); 674 extern void *nu_map(Lm_list *, caddr_t, size_t, int, int); 675 extern Fct *map_obj(Lm_list *, Fdesc *, size_t, const char *, int, 676 Rej_desc *); 677 extern void *malloc(size_t); 678 extern int move_data(Rt_map *, APlist **); 679 extern void rd_event(Lm_list *, rd_event_e, r_state_e); 680 extern int readenv_user(const char **, Word *, Word *, int); 681 extern int readenv_config(Rtc_env *, Addr, int); 682 extern void rejection_inherit(Rej_desc *, Rej_desc *); 683 extern int relocate_lmc(Lm_list *, Aliste, Rt_map *, Rt_map *, 684 int *); 685 extern int relocate_finish(Rt_map *, APlist *, int); 686 extern void remove_cntl(Lm_list *, Aliste); 687 extern int remove_hdl(Grp_hdl *, Rt_map *, int *); 688 extern void remove_lmc(Lm_list *, Rt_map *, Aliste, const char *); 689 extern void remove_lml(Lm_list *); 690 extern void remove_plist(Alist **, int); 691 extern void remove_so(Lm_list *, Rt_map *); 692 extern int rt_cond_wait(Rt_cond *, Rt_lock *); 693 extern int rt_bind_guard(int); 694 extern int rt_bind_clear(int); 695 extern int rt_get_extern(Lm_list *, Rt_map *); 696 extern int rt_mutex_lock(Rt_lock *); 697 extern int rt_mutex_unlock(Rt_lock *); 698 extern void rt_thr_init(Lm_list *); 699 extern thread_t rt_thr_self(void); 700 extern void rtld_db_dlactivity(Lm_list *); 701 extern void rtld_db_preinit(Lm_list *); 702 extern void rtld_db_postinit(Lm_list *); 703 extern void rtldexit(Lm_list *, int); 704 #ifndef _LP64 705 extern int rtld_fstat(int, rtld_stat_t *restrict); 706 extern int rtld_stat(const char *restrict, rtld_stat_t *restrict); 707 #endif 708 extern int rtld_getopt(char **, char ***, auxv_t **, Word *, 709 Word *, int); 710 extern void security(uid_t, uid_t, gid_t, gid_t, int); 711 extern void set_environ(Lm_list *); 712 extern void set_dirs(Alist **, Spath_defn *, uint_t); 713 extern int set_prot(Rt_map *, mmapobj_result_t *, int); 714 extern Rt_map *setup(char **, auxv_t *, Word, char *, int, char *, 715 ulong_t, ulong_t, int fd, Phdr *, char *, char **, 716 uid_t, uid_t, gid_t, gid_t, void *, int, uint_t); 717 extern const char *stravl_insert(const char *, uint_t, size_t, int); 718 extern void spavl_insert(const char *); 719 extern int spavl_recorded(const char *, avl_index_t *); 720 extern int sfcap_check(Xword, Rej_desc *); 721 extern int tls_assign(Lm_list *, Rt_map *, Phdr *); 722 extern void tls_modaddrem(Rt_map *, uint_t); 723 extern int tls_statmod(Lm_list *, Rt_map *); 724 extern Rt_map **tsort(Rt_map *, int, int); 725 extern void unused(Lm_list *); 726 extern void unmap_obj(mmapobj_result_t *, uint_t); 727 extern int update_mode(Rt_map *, int, int); 728 extern void zero(caddr_t, size_t); 729 730 #if defined(__sparc) 731 /* 732 * SPARC Register symbol support. 733 */ 734 extern int elf_regsyms(Rt_map *); 735 extern void set_sparc_g1(ulong_t); 736 extern void set_sparc_g2(ulong_t); 737 extern void set_sparc_g3(ulong_t); 738 extern void set_sparc_g4(ulong_t); 739 extern void set_sparc_g5(ulong_t); 740 extern void set_sparc_g6(ulong_t); 741 extern void set_sparc_g7(ulong_t); 742 #endif 743 744 extern long _sysconfig(int); 745 746 #ifdef __cplusplus 747 } 748 #endif 749 750 #endif /* __RTLD_H */ 751