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 8 /* 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 */ 162 163 164 /* 165 * Size of buffer for building error messages. 166 */ 167 #define ERRSIZE 2048 /* MAXPATHLEN * 2 */ 168 169 /* 170 * Configuration file information. 171 */ 172 typedef struct config { 173 const char *c_name; 174 Addr c_bgn; 175 Addr c_end; 176 Word *c_hashtbl; 177 Word *c_hashchain; 178 const char *c_strtbl; 179 Rtc_obj *c_objtbl; 180 Rtc_fltr *c_fltr; 181 Rtc_flte *c_flte; 182 } Config; 183 184 /* 185 * Register symbol list. 186 */ 187 typedef struct reglist { 188 Rt_map *rl_lmp; /* defining object */ 189 Sym *rl_sym; /* regsym */ 190 struct reglist *rl_next; /* next entry */ 191 } Reglist; 192 193 /* 194 * Data structure to hold interpreter information. 195 */ 196 typedef struct interp { 197 char *i_name; /* interpreter name */ 198 caddr_t i_faddr; /* address interpreter is mapped at */ 199 } Interp; 200 201 /* 202 * Data structure used to keep track of copy relocations. These relocations 203 * are collected during initial relocation processing and maintained on the 204 * COPY(lmp) list of the defining object. Each copy list is also added to the 205 * COPY(lmp) of the head object (normally the application dynamic executable) 206 * from which they will be processed after all relocations are done. 207 * 208 * The use of RTLD_GROUP will also reference individual objects COPY(lmp) lists 209 * in case a bound symbol must be assigned to it actual copy relocation. 210 */ 211 typedef struct { 212 const char *r_name; /* symbol name */ 213 Sym *r_rsym; /* reference symbol table entry */ 214 Rt_map *r_rlmp; /* reference link map */ 215 Rt_map *r_dlmp; /* definition link map */ 216 Sym *r_dsym; /* definition symbol table entry */ 217 void *r_radd; /* copy to address */ 218 const void *r_dadd; /* copy from address */ 219 ulong_t r_size; /* copy size bytes */ 220 } Rel_copy; 221 222 /* 223 * Define a file descriptor, which maintains information regarding a pathname 224 * that has been opened and minimally inspected. 225 */ 226 struct fdesc { 227 Rt_map *fd_lmp; /* existing link-map pointer */ 228 Fct *fd_ftp; /* file functions pointer */ 229 const char *fd_oname; /* original file name */ 230 const char *fd_odir; /* original directory name */ 231 const char *fd_nname; /* new file (expanded) name */ 232 const char *fd_pname; /* new path (resolved) name */ 233 dev_t fd_dev; /* file device number */ 234 rtld_ino_t fd_ino; /* file inode number */ 235 uint_t fd_flags; 236 avl_index_t fd_avlwhere; /* avl tree insertion index */ 237 Xword fd_hwcap; /* hardware capabilities value */ 238 mmapobj_result_t *fd_mapp; /* mapping pointer */ 239 uint_t fd_mapn; /* mapping number */ 240 }; 241 242 #define FLG_FD_ALTER 0x0001 /* file is an alternate */ 243 #define FLG_FD_SLASH 0x0002 /* file contains a "/" */ 244 #define FLG_FD_RESOLVED 0x0004 /* fd_nname has been resolved */ 245 246 /* 247 * File descriptor availability flag. 248 */ 249 #define FD_UNAVAIL -1 250 251 /* 252 * Disabled filter flag. Filter objects are referenced using their .dynamic 253 * index (DT_FILTER or DT_AUXILIARY). This index is saved and used to lookup 254 * the required filter. Note that 0 is a valid .dynamic index. The caller's 255 * OBJFLTRNDX() element is initialized using the following flag, and should 256 * the filter's initialization fail, is reset to this value to indicate the 257 * filter is disabled. UINT_MAX provides a convenient invalid .dynamic index. 258 */ 259 #define FLTR_DISABLED UINT_MAX 260 261 /* 262 * Status flags for rtld_flags 263 */ 264 #define RT_FL_THREADS 0x00000001 /* threads are enabled */ 265 #define RT_FL_WARNFLTR 0x00000002 /* warn of missing filtees (ldd) */ 266 #define RT_FL_DBNOTIF 0x00000004 /* binding activity going on */ 267 268 #define RT_FL_NOBIND 0x00000010 /* don't carry out plt binding */ 269 #define RT_FL_NOVERSION 0x00000020 /* disable version checking */ 270 #define RT_FL_SECURE 0x00000040 /* setuid/segid flag */ 271 #define RT_FL_APPLIC 0x00000080 /* are we executing user code */ 272 273 #define RT_FL_CONFGEN 0x00000200 /* don't relocate initiating object */ 274 /* set by crle(1). */ 275 #define RT_FL_CONFAPP 0x00000400 /* application specific configuration */ 276 /* cache required */ 277 #define RT_FL_DEBUGGER 0x00000800 /* a debugger is monitoring us */ 278 #define RT_FL_OPERATION 0x00001000 /* start recording operations */ 279 #define RT_FL_NEWLOCALE 0x00002000 /* message locale has changed */ 280 #define RT_FL_NOBAPLT 0x00004000 /* sparc: don't use ba plt's */ 281 #define RT_FL_NOAUXFLTR 0x00008000 /* disable auxiliary filters */ 282 283 #define RT_FL_NOAUDIT 0x00020000 /* disable auditing */ 284 #define RT_FL_ATEXIT 0x00040000 /* we're shutting down */ 285 #define RT_FL_SILENCERR 0x00080000 /* silence error messages */ 286 287 #define RT_FL_INITFIRST 0x00200000 /* processing a DT_INITFIRST object */ 288 289 #define RT_FL_DEMANGLE 0x01000000 /* demangle C++ symbol names */ 290 #define RT_FL_NOCFG 0x02000000 /* disable config file use */ 291 #define RT_FL_NODIRCFG 0x04000000 /* disable directory config use */ 292 #define RT_FL_NOOBJALT 0x08000000 /* disable object alternative use */ 293 #define RT_FL_NOENVCFG 0x10000000 /* disable config envars use */ 294 #define RT_FL_DIRCFG 0x20000000 /* directory config info available */ 295 #define RT_FL_OBJALT 0x40000000 /* object alternatives are available */ 296 #define RT_FL_MEMRESV 0x80000000 /* memory reservation established */ 297 298 /* 299 * Status flags for rtld_flags2 300 */ 301 #define RT_FL2_HASAUDIT 0x00000001 /* auditing lm_list is present */ 302 #define RT_FL2_RTLDSEEN 0x00000002 /* rtldinfo has been set */ 303 #define RT_FL2_UNIFPROC 0x00000004 /* libc/libthread unified environment */ 304 305 #define RT_FL2_NOFLTCFG 0x00000010 /* disable config filter use */ 306 #define RT_FL2_FLTCFG 0x00000020 /* filter config info available */ 307 #define RT_FL2_HWCAP 0x00000040 /* hardware capabilities available */ 308 #define RT_FL2_FTL2WARN 0x00000080 /* convert fatal to warning messages */ 309 #define RT_FL2_BINDNOW 0x00000100 /* LD_BIND_NOW in effect */ 310 #define RT_FL2_BINDLAZY 0x00000200 /* disable RTLD_NOW (and LD_BIND_NOW) */ 311 #define RT_FL2_PLMSETUP 0x00000400 /* primary link-map set up complete */ 312 #define RT_FL2_BRANDED 0x00000800 /* process is branded */ 313 #define RT_FL2_NOPLM 0x00001000 /* process has no primary link map */ 314 #define RT_FL2_SETUID 0x00002000 /* ld.so.1 is setuid root */ 315 #define RT_FL2_ADDR32 0x00004000 /* 32-bit address space requirement */ 316 317 /* 318 * Information flags for env_info. 319 */ 320 #define ENV_INF_PATHCFG 0x00000001 /* replaceable LD_LIBRARY_PATH */ 321 /* originates from configuration */ 322 /* file */ 323 #define ENV_INF_FLAGCFG 0x00000002 /* replaceable LD_FLAGS originates */ 324 /* from configuration file */ 325 326 /* 327 * RTLDINFO descriptor. 328 */ 329 typedef struct { 330 Rt_map *rti_lmp; /* RTLDINFO provider */ 331 Lc_interface *rti_info; /* RTLDINFO data */ 332 } Rti_desc; 333 334 /* 335 * Binding flags for the rt_bind_guard()/rt_bind_clear() routines. 336 * These are defined in usr/src/lib/libc/inc/libc_int.h in the 337 * latest version of the libc/rtld runtime interface (CI_V_FIVE). 338 */ 339 #if !defined(CI_V_FIVE) 340 #define THR_FLG_RTLD 0x00000001 /* rtldlock bind guard flag */ 341 #define THR_FLG_NOLOCK 0x00000000 /* no-op before CI_V_FIVE */ 342 #define THR_FLG_REENTER 0x00000000 /* no-op before CI_V_FIVE */ 343 #endif 344 345 #define ROUND(x, a) (((int)(x) + ((int)(a) - 1)) & ~((int)(a) - 1)) 346 347 /* 348 * Print buffer. 349 */ 350 typedef struct { 351 char *pr_buf; /* pointer to beginning of buffer */ 352 char *pr_cur; /* pointer to next free char in buffer */ 353 size_t pr_len; /* buffer size */ 354 int pr_fd; /* output fd */ 355 } Prfbuf; 356 357 /* 358 * Path name descriptor. Used to construct various path names such as search 359 * paths, dependency paths, filter paths etc. The pd_info element can be used 360 * to hold various pointers, like Grp_hdl, Rtc_obj, etc. 361 */ 362 struct pdesc { 363 const char *pd_pname; /* path name - may be expanded */ 364 const char *pd_oname; /* original name - unexpanded */ 365 void *pd_info; /* possible auxiliary information */ 366 size_t pd_plen; /* path name length */ 367 uint_t pd_flags; /* descriptor specific flags */ 368 }; 369 370 /* 371 * Path name descriptors are passed to expand_path() and expand(). These 372 * routines break down possible multiple path strings (separated with ":"), 373 * and perform any reserved token expansion. These routines are passed 374 * information that indicates the use of the path, for example, search paths, 375 * i.e., LD_LIBRARY_PATH, RPATHS, etc. are defined using la_objsearch() 376 * information (see LA_SER flags in link.h). This information is recorded in 377 * the pd_flags field for later use. 378 * 379 * Define expansion path tokens. These are used to prevent various expansions 380 * from occurring, and record those expansions that do. Any expansion 381 * information is also recorded in the pd_flags field, and thus is or'd 382 * together with any LA_SER flags. 383 */ 384 #define PD_TKN_ORIGIN 0x00001000 /* $ORIGIN expansion has occurred */ 385 #define PD_TKN_PLATFORM 0x00002000 /* $PLATFORM expansion has occurred */ 386 #define PD_TKN_OSNAME 0x00004000 /* $OSNAME expansion has occurred */ 387 #define PD_TKN_OSREL 0x00008000 /* $OSREL expansion has occurred */ 388 #define PD_TKN_ISALIST 0x00010000 /* $ISALIST expansion has occurred */ 389 #define PD_TKN_HWCAP 0x00020000 /* $HWCAP expansion has occurred */ 390 #define PD_TKN_RESOLVED 0x00040000 /* resolvepath() expansion has */ 391 /* occurred */ 392 #define PD_MSK_EXPAND 0x000ff000 /* mask for all expansions */ 393 394 /* 395 * Define additional path information. These definitions extend the path 396 * information, and may be passed into expand_path(), or set internally, or 397 * inherited from expand(). These definitions are or'd together with any 398 * LA_SER_ flags and PD_TKN_ flags. 399 */ 400 #define PD_FLG_PNSLASH 0x00100000 /* pd_pname contains a slash */ 401 #define PD_FLG_DUPLICAT 0x00200000 /* path is a duplicate */ 402 #define PD_FLG_EXTLOAD 0x00400000 /* path defines extra loaded objects */ 403 /* (preload, audit etc.) */ 404 #define PD_FLG_UNIQUE 0x00800000 /* ensure path is unique */ 405 #define PD_FLG_USED 0x01000000 /* indicate that path is used */ 406 #define PD_FLG_FULLPATH 0x02000000 /* ensure path is a full path */ 407 408 #define PD_MSK_INHERIT 0x0ffff000 /* mask for pd_flags incorporation */ 409 410 /* 411 * Additional token expansion information. Although these flags may be set 412 * within a token data item return from expand(), they are masked off with 413 * PD_MSK_INHERIT prior to any expansion information being recorded in a path 414 * name descriptor for later diagnostics. 415 */ 416 #define TKN_NONE 0x00000001 /* no token expansion has occurred */ 417 #define TKN_DOTSLASH 0x00000002 /* path contains a "./" */ 418 419 /* 420 * dlopen() handle list size. 421 */ 422 #define HDLIST_SZ 101 /* prime no. for hashing */ 423 #define HDLIST_ORP 102 /* orphan handle list */ 424 425 /* 426 * Define a path name search descriptor. This "cookie" maintains state as 427 * search paths are processed with get_next_dir(). Note, the path list is an 428 * indirect pointer, as search paths can be reevaluated for secure applications 429 * to provide better error diagnostics. 430 */ 431 typedef struct { 432 uchar_t *sp_rule; /* present search rule */ 433 Alist **sp_dalpp; /* present path list within rule */ 434 Aliste sp_idx; /* present index within path list */ 435 } Spath_desc; 436 437 /* 438 * Define a path name definition descriptor. Used to maintain initial ELF and 439 * AOUT path name definitions. 440 */ 441 typedef struct { 442 const char *sd_name; /* path name */ 443 size_t sd_len; /* path name size */ 444 } Spath_defn; 445 446 /* 447 * Define _caller flags. 448 */ 449 #define CL_NONE 0 450 #define CL_EXECDEF 1 /* supply the executable as a default */ 451 /* if the caller can't be determined */ 452 453 /* 454 * Binding information flags. These flags are passed up from low level binding 455 * routines to indicate "additional" information, such as why a binding has been 456 * rejected. These flags use the same data element as is used to record any 457 * DBG_BINFO flags. The DBG_BINFO flags are used to define the final bindings 458 * information and are used to provide better binding diagnostics. 459 */ 460 #define BINFO_REJDIRECT 0x010000 /* reject a direct binding */ 461 #define BINFO_REJSINGLE 0x100000 /* reject a singleton binding */ 462 #define BINFO_REJGROUP 0x200000 /* reject a group binding */ 463 464 #define BINFO_MSK_TRYAGAIN 0xf00000 /* a mask of bindings that */ 465 /* should be retried */ 466 #define BINFO_MSK_REJECTED 0xff0000 /* a mask of bindings that */ 467 /* have been rejected */ 468 469 /* 470 * The 32-bit version of rtld uses special stat() wrapper functions 471 * that preserve the non-largefile semantics of stat()/fstat() while 472 * allowing for large inode values. The 64-bit rtld uses stat() directly. 473 */ 474 #ifdef _LP64 475 #define rtld_fstat fstat 476 #define rtld_stat stat 477 typedef struct stat rtld_stat_t; 478 #else 479 typedef struct { 480 dev_t st_dev; 481 rtld_ino_t st_ino; 482 mode_t st_mode; 483 uid_t st_uid; 484 off_t st_size; 485 timestruc_t st_mtim; 486 #ifdef sparc 487 blksize_t st_blksize; 488 #endif 489 } rtld_stat_t; 490 #endif 491 492 493 /* 494 * Data declarations. 495 */ 496 extern Lc_desc glcs[]; /* global external interfaces */ 497 498 extern Rt_lock rtldlock; /* rtld lock */ 499 extern int thr_flg_nolock; 500 extern int thr_flg_reenter; 501 502 extern List dynlm_list; /* dynamic list of link-maps */ 503 extern char **environ; /* environ pointer */ 504 505 extern int dyn_plt_ent_size; /* Size of dynamic plt's */ 506 extern ulong_t at_flags; /* machine specific file flags */ 507 extern const char *procname; /* file name of executing process */ 508 extern Rtld_db_priv r_debug; /* debugging information */ 509 extern char *lasterr; /* string describing last error */ 510 extern Interp *interp; /* ELF executable interpreter info */ 511 extern const char *rtldname; /* name of the dynamic linker */ 512 extern APlist *hdl_alp[]; /* dlopen() handle list */ 513 extern size_t syspagsz; /* system page size */ 514 extern char *platform; /* platform name */ 515 extern size_t platform_sz; /* platform name string size */ 516 extern Isa_desc *isa; /* isalist descriptor */ 517 extern Uts_desc *uts; /* utsname descriptor */ 518 extern uint_t rtld_flags; /* status flags for RTLD */ 519 extern uint_t rtld_flags2; /* additional status flags for RTLD */ 520 extern uint32_t pltcnt21d; /* cnt of 21d PLTs */ 521 extern uint32_t pltcnt24d; /* cnt of 24d PLTs */ 522 extern uint32_t pltcntu32; /* cnt of u32 PLTs */ 523 extern uint32_t pltcntu44; /* cnt of u44 PLTs */ 524 extern uint32_t pltcntfull; /* cnt of full PLTs */ 525 extern uint32_t pltcntfar; /* cnt of far PLTs */ 526 extern uchar_t search_rules[]; /* dependency search rules */ 527 528 extern Fct elf_fct; /* ELF file class dependent data */ 529 530 #if defined(__sparc) && !defined(__sparcv9) 531 extern Fct aout_fct; /* a.out (4.x) file class dependent */ 532 /* data */ 533 #endif 534 535 extern const char *locale; /* locale environment setting */ 536 537 extern Config *config; /* configuration structure */ 538 extern const char *locale; /* locale environment setting */ 539 540 extern const char *rpl_audit; /* replaceable LD_AUDIT string */ 541 extern const char *rpl_debug; /* replaceable LD_DEBUG string */ 542 extern const char *rpl_ldflags; /* replaceable LD_FLAGS string */ 543 extern const char *rpl_libpath; /* replaceable LD_LIBRARY string */ 544 extern Alist *rpl_libdirs; /* and its associated Pdesc list */ 545 extern const char *rpl_preload; /* replaceable LD_PRELOAD string */ 546 547 extern const char *prm_audit; /* permanent LD_AUDIT string */ 548 extern const char *prm_debug; /* permanent LD_DEBUG string */ 549 extern const char *prm_ldflags; /* permanent LD_FLAGS string */ 550 extern const char *prm_libpath; /* permanent LD_LIBRARY string */ 551 extern Alist *prm_libdirs; /* and its associated Pdesc list */ 552 extern const char *prm_preload; /* permanent LD_PRELOAD string */ 553 554 extern Alist *elf_def_dirs; /* ELF default directory seach paths */ 555 extern Alist *elf_sec_dirs; /* ELF secure directory seach paths */ 556 extern Alist *aout_def_dirs; /* AOUT default directory seach paths */ 557 extern Alist *aout_sec_dirs; /* AOUT secure directory seach paths */ 558 559 extern uint_t env_info; /* information regarding environment */ 560 /* variables */ 561 extern int killsig; /* signal sent on fatal exit */ 562 extern APlist *free_alp; /* defragmentation list */ 563 564 extern uint_t audit_argcnt; /* no. of stack args to copy */ 565 extern Audit_desc *auditors; /* global auditors */ 566 567 extern char **_environ; 568 569 extern const char *dbg_file; /* debugging directed to a file */ 570 571 extern Reglist *reglist; /* list of register symbols */ 572 573 extern const Msg err_reject[]; /* rejection error message tables */ 574 extern const Msg ldd_reject[]; 575 576 extern const char *profile_name; /* object being profiled */ 577 extern const char *profile_out; /* profile output file */ 578 extern const char *profile_lib; /* audit library to perform profile */ 579 580 extern Dl_argsinfo argsinfo; /* process argument, environment and */ 581 /* auxv information */ 582 583 extern const char *err_strs[]; /* diagnostic error string headers */ 584 extern const char *nosym_str; /* MSG_GEN_NOSYM message cache */ 585 586 extern ulong_t hwcap; /* hardware capabilities */ 587 extern ulong_t sfcap; /* software capabilities */ 588 589 extern avl_tree_t *nfavl; /* not-found AVL path name tree */ 590 591 /* 592 * Function declarations. 593 */ 594 extern void addfree(void *, size_t); 595 extern int append_alias(Rt_map *, const char *, int *); 596 extern Rt_map *analyze_lmc(Lm_list *, Aliste, Rt_map *, int *); 597 extern void atexit_fini(void); 598 extern int bind_one(Rt_map *, Rt_map *, uint_t); 599 extern int bufprint(Prfbuf *, const char *, ...); 600 extern void call_array(Addr *, uint_t, Rt_map *, Word); 601 extern void call_fini(Lm_list *, Rt_map **); 602 extern void call_init(Rt_map **, int); 603 extern int callable(Rt_map *, Rt_map *, Grp_hdl *, uint_t); 604 extern Rt_map *_caller(caddr_t, int); 605 extern caddr_t caller(void); 606 extern void *calloc(size_t, size_t); 607 extern void cap_assign(Cap *, Rt_map *); 608 extern const char *_conv_reloc_type(uint_t rel); 609 extern void defrag(void); 610 extern uintptr_t dbg_setup(const char *, Dbg_desc *); 611 extern const char *demangle(const char *); 612 extern int dlclose_intn(Grp_hdl *, Rt_map *); 613 extern int dlclose_core(Grp_hdl *, Rt_map *, Lm_list *); 614 extern Sym *dlsym_handle(Grp_hdl *, Slookup *, Rt_map **, 615 uint_t *, int *); 616 extern void *dlsym_intn(void *, const char *, Rt_map *, Rt_map **); 617 extern Grp_hdl *dlmopen_intn(Lm_list *, const char *, int, Rt_map *, 618 uint_t, uint_t); 619 extern size_t doprf(const char *, va_list, Prfbuf *); 620 extern int dowrite(Prfbuf *); 621 extern void *dz_map(Lm_list *, caddr_t, size_t, int, int); 622 extern int enter(int); 623 extern uint_t expand(char **, size_t *, char **, uint_t, uint_t, 624 Rt_map *); 625 extern int expand_paths(Rt_map *, const char *, Alist **, Aliste, 626 uint_t, uint_t); 627 extern void free_hdl(Grp_hdl *, Rt_map *, uint_t); 628 extern void file_notfound(Lm_list *, const char *, Rt_map *, 629 uint_t, Rej_desc *); 630 extern int find_path(Lm_list *, Rt_map *, uint_t, Fdesc *, 631 Rej_desc *, int *); 632 extern int fpavl_insert(Lm_list *, Rt_map *, const char *, 633 avl_index_t); 634 extern Rt_map *fpavl_recorded(Lm_list *, const char *, uint_t, 635 avl_index_t *); 636 extern void fpavl_remove(Rt_map *); 637 extern size_t fullpath(Rt_map *, Fdesc *); 638 extern void get_lcinterface(Rt_map *, Lc_interface *); 639 extern Lmid_t get_linkmap_id(Lm_list *); 640 extern Pdesc *get_next_dir(Spath_desc *, Rt_map *, uint_t); 641 extern int hdl_add(Grp_hdl *, Rt_map *, uint_t); 642 extern Grp_hdl *hdl_create(Lm_list *, Rt_map *, Rt_map *, uint_t, 643 uint_t, uint_t); 644 extern int hdl_initialize(Grp_hdl *, Rt_map *, int, int); 645 extern int hwcap_check(Xword, Rej_desc *); 646 extern int hwcap_filtees(Alist **, Aliste, const char *, Aliste, 647 Lm_cntl *, Rt_map *, const char *, int, uint_t, 648 int *); 649 extern void is_dep_init(Rt_map *, Rt_map *); 650 extern int is_move_data(caddr_t); 651 extern int is_path_secure(char *, Rt_map *, uint_t, uint_t); 652 extern int is_rtld_setuid(); 653 extern int is_sym_interposer(Rt_map *, Sym *); 654 extern void ldso_plt_init(Rt_map *); 655 extern Listnode *list_append(List *, const void *); 656 extern Listnode *list_insert(List *, const void *, Listnode *); 657 extern Listnode *list_prepend(List *, const void *); 658 extern void list_delete(List *, void *); 659 extern void leave(Lm_list *, int); 660 extern void lm_append(Lm_list *, Aliste, Rt_map *); 661 extern void lm_delete(Lm_list *, Rt_map *); 662 extern void lm_move(Lm_list *, Aliste, Aliste, Lm_cntl *, 663 Lm_cntl *); 664 extern void load_completion(Rt_map *); 665 extern Rt_map *load_file(Lm_list *, Aliste, Fdesc *, int *); 666 extern Rt_map *load_hwcap(Lm_list *, Aliste, const char *, Rt_map *, 667 uint_t, uint_t, Grp_hdl **, Rej_desc *, int *); 668 extern Rt_map *load_path(Lm_list *, Aliste, Rt_map *, int, uint_t, 669 Grp_hdl **, Fdesc *, Rej_desc *, int *); 670 extern Rt_map *load_one(Lm_list *, Aliste, Alist *, Rt_map *, int, 671 uint_t, Grp_hdl **, int *); 672 extern const char *load_trace(Lm_list *, Pdesc *, Rt_map *, Fdesc *); 673 extern void nfavl_insert(const char *, avl_index_t); 674 extern int nfavl_recorded(const char *, uint_t, avl_index_t *); 675 extern void *nu_map(Lm_list *, caddr_t, size_t, int, int); 676 extern Fct *map_obj(Lm_list *, Fdesc *, size_t, const char *, int, 677 Rej_desc *); 678 extern void *malloc(size_t); 679 extern int move_data(Rt_map *, APlist **); 680 extern void rd_event(Lm_list *, rd_event_e, r_state_e); 681 extern int readenv_user(const char **, Word *, Word *, int); 682 extern int readenv_config(Rtc_env *, Addr, int); 683 extern void rejection_inherit(Rej_desc *, Rej_desc *); 684 extern int relocate_lmc(Lm_list *, Aliste, Rt_map *, Rt_map *, 685 int *); 686 extern int relocate_finish(Rt_map *, APlist *, int); 687 extern void remove_cntl(Lm_list *, Aliste); 688 extern int remove_hdl(Grp_hdl *, Rt_map *, int *); 689 extern void remove_lmc(Lm_list *, Rt_map *, Lm_cntl *, Aliste, 690 const char *); 691 extern void remove_lml(Lm_list *); 692 extern void remove_plist(Alist **, int); 693 extern void remove_so(Lm_list *, Rt_map *); 694 extern int rt_cond_wait(Rt_cond *, Rt_lock *); 695 extern int rt_bind_guard(int); 696 extern int rt_bind_clear(int); 697 extern int rt_get_extern(Lm_list *, Rt_map *); 698 extern int rt_mutex_lock(Rt_lock *); 699 extern int rt_mutex_unlock(Rt_lock *); 700 extern void rt_thr_init(Lm_list *); 701 extern thread_t rt_thr_self(void); 702 extern void rtld_db_dlactivity(Lm_list *); 703 extern void rtld_db_preinit(Lm_list *); 704 extern void rtld_db_postinit(Lm_list *); 705 extern void rtldexit(Lm_list *, int); 706 #ifndef _LP64 707 extern int rtld_fstat(int, rtld_stat_t *restrict); 708 extern int rtld_stat(const char *restrict, rtld_stat_t *restrict); 709 #endif 710 extern int rtld_getopt(char **, char ***, auxv_t **, Word *, 711 Word *, int); 712 extern void security(uid_t, uid_t, gid_t, gid_t, int); 713 extern void set_environ(Lm_list *); 714 extern void set_dirs(Alist **, Spath_defn *, uint_t); 715 extern int set_prot(Rt_map *, mmapobj_result_t *, int); 716 extern Rt_map *setup(char **, auxv_t *, Word, char *, int, char *, 717 ulong_t, ulong_t, int fd, Phdr *, char *, char **, 718 uid_t, uid_t, gid_t, gid_t, void *, int, uint_t); 719 extern const char *stravl_insert(const char *, uint_t, size_t, int); 720 extern void spavl_insert(const char *); 721 extern int spavl_recorded(const char *, avl_index_t *); 722 extern int sfcap_check(Xword, Rej_desc *); 723 extern int tls_assign(Lm_list *, Rt_map *, Phdr *); 724 extern void tls_modaddrem(Rt_map *, uint_t); 725 extern int tls_statmod(Lm_list *, Rt_map *); 726 extern Rt_map **tsort(Rt_map *, int, int); 727 extern void unused(Lm_list *); 728 extern void unmap_obj(mmapobj_result_t *, uint_t); 729 extern int update_mode(Rt_map *, int, int); 730 extern void zero(caddr_t, size_t); 731 732 #if defined(__sparc) 733 /* 734 * SPARC Register symbol support. 735 */ 736 extern int elf_regsyms(Rt_map *); 737 extern void set_sparc_g1(ulong_t); 738 extern void set_sparc_g2(ulong_t); 739 extern void set_sparc_g3(ulong_t); 740 extern void set_sparc_g4(ulong_t); 741 extern void set_sparc_g5(ulong_t); 742 extern void set_sparc_g6(ulong_t); 743 extern void set_sparc_g7(ulong_t); 744 #endif 745 746 extern long _sysconfig(int); 747 748 #ifdef __cplusplus 749 } 750 #endif 751 752 #endif /* __RTLD_H */ 753