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