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