1 /* $NetBSD: rtld.h,v 1.157 2026/07/18 04:26:42 riastradh Exp $ */ 2 3 /* 4 * Copyright 1996 John D. Polstra. 5 * Copyright 1996 Matt Thomas <matt (at) 3am-software.com> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by John Polstra. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #ifndef RTLD_H 35 #define RTLD_H 36 37 #include <dlfcn.h> 38 #include <signal.h> 39 #include <stdbool.h> 40 #include <stddef.h> 41 #include <sys/param.h> 42 #include <sys/endian.h> 43 #include <sys/types.h> 44 #include <sys/queue.h> 45 #include <sys/exec_elf.h> 46 #include <sys/tls.h> 47 #include "rtldenv.h" 48 #include "link.h" 49 50 #if defined(_RTLD_SOURCE) 51 52 #if defined(__ARM_EABI__) && !defined(__ARM_DWARF_EH__) 53 #include "unwind.h" 54 #endif 55 56 #ifndef RTLD_DEFAULT_LIBRARY_PATH 57 #define RTLD_DEFAULT_LIBRARY_PATH "/usr/lib" 58 #endif 59 #define _PATH_LD_HINTS "/etc/ld.so.conf" 60 61 extern size_t _rtld_pagesz; 62 63 #define round_down(x) ((x) & ~(_rtld_pagesz - 1)) 64 #define round_up(x) round_down((x) + _rtld_pagesz - 1) 65 66 #define NEW(type) ((type *) xmalloc(sizeof(type))) 67 #define CNEW(type) ((type *) xcalloc(sizeof(type))) 68 69 /* 70 * Fill in a DoneList with an allocation large enough to hold all of 71 * the currently-loaded objects. Keep this in a macro since it calls 72 * alloca and we want that to occur within the scope of the caller. 73 * Callers must be built with -Wno-stack-protector. 74 */ 75 #define _rtld_donelist_init(dlp) \ 76 ((dlp)->num_alloc = _rtld_objcount, \ 77 (dlp)->objs = alloca((dlp)->num_alloc * sizeof((dlp)->objs[0])), \ 78 assert((dlp)->objs != NULL), \ 79 (dlp)->num_used = 0) 80 81 82 typedef struct Struct_Elf_Hash { 83 unsigned long sysv; 84 unsigned long gnu; 85 } Elf_Hash; 86 #endif /* _RTLD_SOURCE */ 87 88 /* 89 * C++ has mandated the use of the following keywords for its new boolean 90 * type. We might as well follow their lead. 91 */ 92 struct Struct_Obj_Entry; 93 94 typedef struct Struct_Objlist_Entry { 95 SIMPLEQ_ENTRY(Struct_Objlist_Entry) link; 96 struct Struct_Obj_Entry *obj; 97 } Objlist_Entry; 98 99 typedef SIMPLEQ_HEAD(Struct_Objlist, Struct_Objlist_Entry) Objlist; 100 101 typedef struct Struct_Name_Entry { 102 SIMPLEQ_ENTRY(Struct_Name_Entry) link; 103 char name[1]; 104 } Name_Entry; 105 106 typedef struct Struct_Needed_Entry { 107 struct Struct_Needed_Entry *next; 108 struct Struct_Obj_Entry *obj; 109 unsigned long name; /* Offset of name in string table */ 110 } Needed_Entry; 111 112 typedef struct _rtld_search_path_t { 113 struct _rtld_search_path_t *sp_next; 114 const char *sp_path; 115 size_t sp_pathlen; 116 } Search_Path; 117 118 typedef struct Struct_Ver_Entry { 119 Elf_Word hash; 120 u_int flags; 121 const char *name; 122 const char *file; 123 } Ver_Entry; 124 125 /* Ver_Entry.flags */ 126 #define VER_INFO_HIDDEN 0x01 127 128 #define RTLD_MAX_ENTRY 10 129 #define RTLD_MAX_LIBRARY 4 130 #define RTLD_MAX_CTL 2 131 typedef struct _rtld_library_xform_t { 132 struct _rtld_library_xform_t *next; 133 char *name; 134 const char *ctlname; 135 struct { 136 char *value; 137 char *library[RTLD_MAX_LIBRARY]; 138 } entry[RTLD_MAX_ENTRY]; 139 } Library_Xform; 140 141 /* 142 * Shared object descriptor. 143 * 144 * Items marked with "(%)" are dynamically allocated, and must be freed 145 * when the structure is destroyed. 146 */ 147 148 typedef void (*fptr_t)(void); 149 150 typedef struct Struct_Obj_Entry { 151 struct Struct_Obj_Entry *next; 152 char *path; /* Pathname of underlying file (%) */ 153 int refcount; 154 int dl_refcount; /* Number of times loaded by dlopen */ 155 156 /* These items are computed by map_object() or by digest_phdr(). */ 157 caddr_t mapbase; /* Base address of mapped region */ 158 size_t mapsize; /* Size of mapped region in bytes */ 159 size_t textsize; /* Size of text segment in bytes */ 160 Elf_Addr vaddrbase; /* Base address in shared object file */ 161 caddr_t relocbase; /* Reloc const = mapbase - *vaddrbase */ 162 Elf_Dyn *dynamic; /* Dynamic section */ 163 caddr_t entry; /* Entry point */ 164 const Elf_Phdr *phdr; /* Program header (may be xmalloc'ed) */ 165 size_t phsize; /* Size of program header in bytes */ 166 167 /* Items from the dynamic section. */ 168 Elf_Addr *pltgot; /* PLTGOT table */ 169 const Elf_Rel *rel; /* Relocation entries */ 170 const Elf_Rel *rellim; /* Limit of Relocation entries */ 171 const Elf_Rela *rela; /* Relocation entries */ 172 const Elf_Rela *relalim; /* Limit of Relocation entries */ 173 const Elf_Relr *relr; /* Relative relocations */ 174 const Elf_Relr *relrlim; /* Limit of relative relocations */ 175 const Elf_Rel *pltrel; /* PLT relocation entries */ 176 const Elf_Rel *pltrellim; /* Limit of PLT relocation entries */ 177 const Elf_Rela *pltrela; /* PLT relocation entries */ 178 const Elf_Rela *pltrelalim; /* Limit of PLT relocation entries */ 179 const Elf_Sym *symtab; /* Symbol table */ 180 const char *strtab; /* String table */ 181 unsigned long strsize; /* Size in bytes of string table */ 182 #if defined(__mips__) || defined(__riscv__) 183 Elf_Word local_gotno; /* Number of local GOT entries */ 184 Elf_Word symtabno; /* Number of dynamic symbols */ 185 Elf_Word gotsym; /* First dynamic symbol in GOT */ 186 #endif 187 188 /* SysV Hash fields */ 189 const Elf_Symindx *buckets; /* Hash table buckets array */ 190 unsigned long unused1; /* Used to be nbuckets */ 191 const Elf_Symindx *chains; /* Hash table chain array */ 192 unsigned long nchains; /* Number of chains */ 193 194 Search_Path *rpaths; /* Search path specified in object */ 195 Needed_Entry *needed; /* Shared objects needed by this (%) */ 196 197 fptr_t init; /* Initialization function to call */ 198 fptr_t fini; /* Termination function to call */ 199 200 u_int32_t mainprog:1, /* True if this is the main program */ 201 rtld:1, /* True if this is the dynamic linker */ 202 textrel:1, /* True if there are relocations to 203 * text seg */ 204 symbolic:1, /* True if generated with 205 * "-Bsymbolic" */ 206 printed:1, /* True if ldd has printed it */ 207 isdynamic:1, /* True if this is a pure PIC object */ 208 mainref:1, /* True if on _rtld_list_main */ 209 globalref:1, /* True if on _rtld_list_global */ 210 init_done:1, /* True if .init has been added */ 211 init_blocked:1, /* True if blocked in recursive dl* */ 212 init_called:1, /* True if .init function has been 213 * called */ 214 fini_called:1, /* True if .fini function has been 215 * called */ 216 z_now:1, /* True if object's symbols should be 217 bound immediately */ 218 z_nodelete:1, /* True if object should never be 219 unloaded */ 220 z_initfirst:1, /* True if object's .init/.fini take 221 * priority over others */ 222 z_noopen:1, /* True if object should never be 223 dlopen'ed */ 224 phdr_loaded:1, /* Phdr is loaded and doesn't need to 225 * be freed. */ 226 #ifdef __alpha__ 227 secureplt:1, /* True if PLT is read-only format */ 228 #endif 229 #if defined(__HAVE_TLS_VARIANT_I) || defined(__HAVE_TLS_VARIANT_II) 230 tls_static:1, /* True if static TLS offset 231 * has been allocated */ 232 tls_dynamic:1, /* True if any non-static DTV entry 233 * has been allocated */ 234 #endif 235 ref_nodel:1, /* Refcount increased to prevent dlclose */ 236 sysv_hash:1, /* SysV Hash available */ 237 gnu_hash:1; /* GNU Hash available */ 238 239 struct link_map linkmap; /* for the debugger */ 240 241 /* These items are computed by map_object() or by digest_phdr(). */ 242 const char *interp; /* Pathname of the interpreter, if any */ 243 Objlist dldags; /* Object belongs to these dlopened DAGs (%) */ 244 Objlist dagmembers; /* DAG has these members (%) */ 245 dev_t dev; /* Object's filesystem's device */ 246 ino_t ino; /* Object's inode number */ 247 248 void *ehdr; 249 250 /* SysV Hash fields */ 251 uint32_t nbuckets; /* Number of buckets */ 252 uint32_t nbuckets_m; /* Precomputed for fast remainder */ 253 uint8_t nbuckets_s1; 254 uint8_t nbuckets_s2; 255 256 /* GNU Hash fields */ 257 const uint32_t *buckets_gnu; /* Hash table buckets array */ 258 uint32_t nbuckets_gnu; /* Number of GNU hash buckets */ 259 uint32_t nbuckets_m_gnu; /* Precomputed for fast remainder */ 260 uint8_t nbuckets_s1_gnu; 261 uint8_t nbuckets_s2_gnu; 262 const uint32_t *chains_gnu; /* Hash table chain array */ 263 #define nchains_gnu nchains /* Number of symbols, shared with SysV Hash */ 264 const Elf_Addr *bloom_gnu; 265 uint32_t symndx_gnu; /* First accessible symbol on dynsym table */ 266 uint32_t mask_bm_gnu; /* Bloom filter words - 1 (bitmask) */ 267 uint32_t shift2_gnu; /* Bloom filter shift count */ 268 269 size_t pathlen; /* Pathname length */ 270 SIMPLEQ_HEAD(, Struct_Name_Entry) names; /* List of names for this 271 * object we know about. */ 272 273 #ifdef __powerpc__ 274 #ifdef _LP64 275 Elf_Addr glink; /* global linkage */ 276 #else 277 Elf_Addr *gotptr; /* GOT table (secure-plt only) */ 278 #endif 279 #endif 280 281 #if defined(__HAVE_TLS_VARIANT_I) || defined(__HAVE_TLS_VARIANT_II) 282 /* Thread Local Storage support for this module */ 283 size_t tlsindex; /* Index in DTV */ 284 void *tlsinit; /* Base address of TLS init block */ 285 size_t tlsinitsize; /* Size of TLS init block */ 286 size_t tlssize; /* Size of TLS block */ 287 size_t tlsoffset; /* Offset in the static TLS block */ 288 size_t tlsalign; /* Needed alignment for static TLS */ 289 #endif 290 291 #ifdef GNU_RELRO 292 /* relocation readonly */ 293 void *relro_page; 294 size_t relro_size; 295 #endif 296 297 /* symbol versioning */ 298 const Elf_Verneed *verneed; /* Required versions. */ 299 Elf_Word verneednum; /* Number of entries in verneed table */ 300 const Elf_Verdef *verdef; /* Provided versions. */ 301 Elf_Word verdefnum; /* Number of entries in verdef table */ 302 const Elf_Versym *versyms; /* Symbol versions table */ 303 304 Ver_Entry *vertab; /* Versions required/defined by this 305 * object */ 306 int vertabnum; /* Number of entries in vertab */ 307 308 /* init_array/fini_array */ 309 fptr_t *init_array; /* start of init array */ 310 size_t init_arraysz; /* # of entries in it */ 311 fptr_t *fini_array; /* start of fini array */ 312 size_t fini_arraysz; /* # of entries in it */ 313 fptr_t *preinit_array; /* start of preinit array */ 314 size_t preinit_arraysz;/* # of entries in it */ 315 /* IRELATIVE relocations */ 316 size_t ifunc_remaining; 317 #if \ 318 defined(__aarch64__) || \ 319 defined(__arm__) || \ 320 defined(__i386__) || \ 321 defined(__powerpc__) || \ 322 defined(__sparc__) || \ 323 defined(__x86_64__) 324 #define IFUNC_NONPLT 325 /* On SPARC, the PLT variant is called JMP_IREL and counted above. */ 326 size_t ifunc_remaining_nonplt; 327 #endif 328 size_t cxa_refcount; /* For TLS destructors. */ 329 #ifdef __ARM_EABI__ 330 void *exidx_start; 331 size_t exidx_sz; 332 #endif 333 int finiwaiter; /* dlopen thread waiting for dlclose */ 334 int initfinilock; /* thread running init/fini */ 335 int initfinilockwaiter; /* thread waiting to init/fini */ 336 int neededrefcount; /* #threads loading obj's deps */ 337 int neededwaiter; /* thread waiting for neededrefcount */ 338 enum { 339 OBJRELOC_NOTYET = 0, /* object created, NEEDED not loaded */ 340 OBJRELOC_READY, /* NEEDED loaded, dldags inited */ 341 OBJRELOC_DONE, /* relocation successful */ 342 OBJRELOC_FAILED, /* relocation failed */ 343 } relocstate; 344 unsigned dlclosing; /* true if being dlclosed now */ 345 } Obj_Entry; 346 347 typedef struct Struct_DoneList { 348 const Obj_Entry **objs; /* Array of object pointers */ 349 unsigned int num_alloc; /* Allocated size of the array */ 350 unsigned int num_used; /* Number of array slots used */ 351 } DoneList; 352 353 354 #if defined(_RTLD_SOURCE) 355 356 extern struct r_debug _rtld_debug; 357 extern Search_Path *_rtld_default_paths; 358 extern Obj_Entry *_rtld_objlist; 359 extern Obj_Entry **_rtld_objtail; 360 extern u_int _rtld_objrelocpending; 361 extern u_int _rtld_objcount; 362 extern u_int _rtld_objloads; 363 extern const uintptr_t _rtld_compat_obj[]; 364 extern Obj_Entry *_rtld_objmain; 365 extern Obj_Entry _rtld_objself; 366 extern Search_Path *_rtld_paths; 367 extern Library_Xform *_rtld_xforms; 368 extern bool _rtld_trust; 369 extern Objlist _rtld_list_global; 370 extern Objlist _rtld_list_main; 371 extern Elf_Sym _rtld_sym_zero; 372 extern u_int _rtld_objgen; 373 374 #define RTLD_MODEMASK 0x3 375 376 /* Flags to be passed into _rtld_symlook_ family of functions. */ 377 #define SYMLOOK_IN_PLT 0x01 /* Lookup for PLT symbol */ 378 #define SYMLOOK_DLSYM 0x02 /* Return newest versioned symbol. 379 Used by dlsym. */ 380 381 /* Flags for _rtld_load_object() and friends. */ 382 #define _RTLD_GLOBAL 0x01 /* Add object to global DAG. */ 383 #define _RTLD_MAIN 0x02 384 #define _RTLD_NOLOAD 0x04 /* dlopen() specified RTLD_NOLOAD. */ 385 #define _RTLD_DLOPEN 0x08 /* Load_object() called from dlopen(). */ 386 387 /* Preallocation for static TLS model */ 388 #define RTLD_STATIC_TLS_RESERVATION 64 389 390 /* rtld.c */ 391 __dso_public char *dlerror(void); 392 __dso_public void *dlopen(const char *, int); 393 __dso_public void *dlsym(void *, const char *); 394 __dso_public int dlclose(void *); 395 __dso_public int dladdr(const void *, Dl_info *); 396 __dso_public int dlinfo(void *, int, void *); 397 __dso_public int dl_iterate_phdr(int (*)(struct dl_phdr_info *, size_t, void *), 398 void *); 399 400 __dso_public void *_dlauxinfo(void) __pure; 401 __dso_public void __dl_cxa_refcount(void *addr, ssize_t delta); 402 403 __dso_public pid_t __locked_fork(int *); 404 405 #if defined(__ARM_EABI__) && !defined(__ARM_DWARF_EH__) 406 /* 407 * This is used by libgcc to find the start and length of the exception table 408 * associated with a PC. 409 */ 410 __dso_public _Unwind_Ptr __gnu_Unwind_Find_exidx(_Unwind_Ptr, int *); 411 #endif 412 413 /* These aren't exported */ 414 void _rtld_error(const char *, ...) __printflike(1,2); 415 void _rtld_die(void) __dead; 416 void *_rtld_objmain_sym(const char *); 417 __dso_public void _rtld_debug_state(void) __noinline; 418 void _rtld_linkmap_add(Obj_Entry *); 419 void _rtld_linkmap_delete(Obj_Entry *); 420 void _rtld_objlist_push_head(Objlist *, Obj_Entry *); 421 void _rtld_objlist_push_tail(Objlist *, Obj_Entry *); 422 Objlist_Entry *_rtld_objlist_find(Objlist *, const Obj_Entry *); 423 void _rtld_ref_dag(Obj_Entry *); 424 425 #ifdef RTLD_LOADER 426 void _rtld_load_needed_enter(Obj_Entry *); 427 void _rtld_load_needed_exit(Obj_Entry *); 428 bool _rtld_wait_for_fini(Obj_Entry **, sigset_t *); 429 #else 430 static inline void 431 _rtld_load_needed_enter(Obj_Entry *obj) 432 { 433 obj->neededrefcount++; 434 } 435 static inline void 436 _rtld_load_needed_exit(Obj_Entry *obj) 437 { 438 obj->neededrefcount--; 439 } 440 static inline bool 441 _rtld_wait_for_fini(Obj_Entry **objp, sigset_t *mask) 442 { 443 assert((*objp)->refcount); 444 return false; 445 } 446 #endif 447 448 void _rtld_shared_enter(void); 449 void _rtld_shared_exit(void); 450 void _rtld_exclusive_enter(sigset_t *); 451 void _rtld_exclusive_exit(sigset_t *); 452 453 int _rtld_relro(const Obj_Entry *, bool); 454 455 /* expand.c */ 456 size_t _rtld_expand_path(char *, size_t, const char *, const char *,\ 457 const char *); 458 459 /* headers.c */ 460 void _rtld_digest_dynamic(const char *, Obj_Entry *); 461 Obj_Entry *_rtld_digest_phdr(const Elf_Phdr *, int, caddr_t); 462 463 /* load.c */ 464 Obj_Entry *_rtld_load_object(const char *, int, sigset_t *); 465 int _rtld_load_needed_objects(Obj_Entry *, int, sigset_t *); 466 int _rtld_preload(const char *, sigset_t *); 467 468 /* arch/<arch>/fixup.c */ 469 int _rtld_map_segment_fixup(const char *, int, Elf_Ehdr *, Elf_Phdr *, 470 caddr_t, size_t, int); 471 472 #define OBJ_ERR (Obj_Entry *)(-1) 473 /* path.c */ 474 void _rtld_add_paths(const char *, Search_Path **, const char *); 475 void _rtld_process_hints(const char *, Search_Path **, Library_Xform **, 476 const char *); 477 int _rtld_sysctl(const char *, void *, size_t *); 478 479 /* reloc.c */ 480 int _rtld_do_copy_relocations(const Obj_Entry *); 481 int _rtld_relocate_objects(Obj_Entry *, bool); 482 int _rtld_relocate_nonplt_objects(Obj_Entry *); 483 int _rtld_relocate_plt_lazy(Obj_Entry *); 484 int _rtld_relocate_plt_objects(const Obj_Entry *); 485 void _rtld_setup_pltgot(const Obj_Entry *); 486 Elf_Addr _rtld_resolve_ifunc(const Obj_Entry *, const Elf_Sym *); 487 Elf_Addr _rtld_resolve_ifunc2(const Obj_Entry *, Elf_Addr); 488 489 void _rtld_call_ifunc(Obj_Entry *, sigset_t *, u_int); 490 491 /* search.c */ 492 Obj_Entry *_rtld_load_library(const char *, const Obj_Entry *, int, 493 sigset_t *); 494 495 /* symbol.c */ 496 const Elf_Sym *_rtld_symlook_obj(const char *, Elf_Hash *, 497 const Obj_Entry *, u_int, const Ver_Entry *); 498 const Elf_Sym *_rtld_find_symdef(unsigned long, const Obj_Entry *, 499 const Obj_Entry **, u_int); 500 const Elf_Sym *_rtld_find_plt_symdef(unsigned long, const Obj_Entry *, 501 const Obj_Entry **, bool); 502 503 const Elf_Sym *_rtld_symlook_list(const char *, Elf_Hash *, 504 const Objlist *, const Obj_Entry **, u_int, const Ver_Entry *, DoneList *); 505 const Elf_Sym *_rtld_symlook_default(const char *, Elf_Hash *, 506 const Obj_Entry *, const Obj_Entry **, u_int, const Ver_Entry *); 507 const Elf_Sym *_rtld_symlook_needed(const char *, Elf_Hash *, 508 const Needed_Entry *, const Obj_Entry **, u_int, const Ver_Entry *, 509 DoneList *, DoneList *); 510 511 /* symver.c */ 512 void _rtld_object_add_name(Obj_Entry *, const char *); 513 int _rtld_object_match_name(const Obj_Entry *, const char *); 514 int _rtld_verify_object_versions(Obj_Entry *); 515 516 static __inline const Ver_Entry * 517 _rtld_fetch_ventry(const Obj_Entry *obj, unsigned long symnum) 518 { 519 Elf_Half vernum; 520 521 if (obj->vertab) { 522 vernum = VER_NDX(obj->versyms[symnum]); 523 if (vernum >= obj->vertabnum) { 524 _rtld_error("%s: symbol %s has wrong verneed value %d", 525 obj->path, &obj->strtab[symnum], vernum); 526 } else if (obj->vertab[vernum].hash) { 527 return &obj->vertab[vernum]; 528 } 529 } 530 return NULL; 531 } 532 533 #if defined(__HAVE_TLS_VARIANT_I) || defined(__HAVE_TLS_VARIANT_II) 534 /* tls.c */ 535 void *_rtld_tls_get_addr(void *, size_t, size_t); 536 void _rtld_tls_initial_allocation(void); 537 int _rtld_tls_offset_allocate(Obj_Entry *); 538 void _rtld_tls_offset_free(Obj_Entry *); 539 540 extern size_t _rtld_tls_dtv_generation; 541 extern size_t _rtld_tls_max_index; 542 543 __dso_public extern void *__tls_get_addr(void *); 544 #ifdef __i386__ 545 __dso_public extern void *___tls_get_addr(void *) 546 __attribute__((__regparm__(1))); 547 #endif 548 #endif 549 550 /* map_object.c */ 551 struct stat; 552 Obj_Entry *_rtld_map_object(const char *, int, const struct stat *); 553 void _rtld_obj_free(Obj_Entry *); 554 Obj_Entry *_rtld_obj_new(void); 555 556 #ifdef RTLD_LOADER 557 /* function descriptors */ 558 #ifdef __HAVE_FUNCTION_DESCRIPTORS 559 Elf_Addr _rtld_function_descriptor_alloc(const Obj_Entry *, 560 const Elf_Sym *, Elf_Addr); 561 const void *_rtld_function_descriptor_function(const void *); 562 563 Elf_Addr _rtld_call_function_addr(const Obj_Entry *, Elf_Addr); 564 #else 565 static inline Elf_Addr 566 _rtld_call_function_addr(const Obj_Entry *obj, Elf_Addr addr) 567 { 568 return ((Elf_Addr(*)(void))addr)(); 569 } 570 #endif /* __HAVE_FUNCTION_DESCRIPTORS */ 571 #endif /* RTLD_LOADER */ 572 573 #endif /* _RTLD_SOURCE */ 574 575 #endif /* RTLD_H */ 576
Indexes created Mon Sep 07 00:24:45 UTC 2026