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 (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
27 */
28
29 #ifndef _SYS_LINK_H
30 #define _SYS_LINK_H
31
32 #ifndef _ASM
33 #include <sys/types.h>
34 #include <sys/elftypes.h>
35 #endif
36
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40
41 /*
42 * Communication structures for the runtime linker.
43 */
44
45 /*
46 * The following data structure provides a self-identifying union consisting
47 * of a tag from a known list and a value.
48 */
49 #ifndef _ASM
50 typedef struct {
51 Elf32_Sword d_tag; /* how to interpret value */
52 union {
53 Elf32_Word d_val;
54 Elf32_Addr d_ptr;
55 Elf32_Off d_off;
56 } d_un;
57 } Elf32_Dyn;
58
59 #if defined(_LP64) || defined(_LONGLONG_TYPE)
60 typedef struct {
61 Elf64_Xword d_tag; /* how to interpret value */
62 union {
63 Elf64_Xword d_val;
64 Elf64_Addr d_ptr;
65 } d_un;
66 } Elf64_Dyn;
67 #endif /* defined(_LP64) || defined(_LONGLONG_TYPE) */
68 #endif /* _ASM */
69
70 /*
71 * Tag values
72 */
73 #define DT_NULL 0 /* last entry in list */
74 #define DT_NEEDED 1 /* a needed object */
75 #define DT_PLTRELSZ 2 /* size of relocations for the PLT */
76 #define DT_PLTGOT 3 /* addresses used by procedure linkage table */
77 #define DT_HASH 4 /* hash table */
78 #define DT_STRTAB 5 /* string table */
79 #define DT_SYMTAB 6 /* symbol table */
80 #define DT_RELA 7 /* addr of relocation entries */
81 #define DT_RELASZ 8 /* size of relocation table */
82 #define DT_RELAENT 9 /* base size of relocation entry */
83 #define DT_STRSZ 10 /* size of string table */
84 #define DT_SYMENT 11 /* size of symbol table entry */
85 #define DT_INIT 12 /* _init addr */
86 #define DT_FINI 13 /* _fini addr */
87 #define DT_SONAME 14 /* name of this shared object */
88 #define DT_RPATH 15 /* run-time search path */
89 #define DT_SYMBOLIC 16 /* shared object linked -Bsymbolic */
90 #define DT_REL 17 /* addr of relocation entries */
91 #define DT_RELSZ 18 /* size of relocation table */
92 #define DT_RELENT 19 /* base size of relocation entry */
93 #define DT_PLTREL 20 /* relocation type for PLT entry */
94 #define DT_DEBUG 21 /* pointer to r_debug structure */
95 #define DT_TEXTREL 22 /* text relocations remain for this object */
96 #define DT_JMPREL 23 /* pointer to the PLT relocation entries */
97 #define DT_BIND_NOW 24 /* perform all relocations at load of object */
98 #define DT_INIT_ARRAY 25 /* pointer to .init_array */
99 #define DT_FINI_ARRAY 26 /* pointer to .fini_array */
100 #define DT_INIT_ARRAYSZ 27 /* size of .init_array */
101 #define DT_FINI_ARRAYSZ 28 /* size of .fini_array */
102 #define DT_RUNPATH 29 /* run-time search path */
103 #define DT_FLAGS 30 /* state flags - see DF_* */
104
105 /*
106 * DT_* encoding rules: The value of each dynamic tag determines the
107 * interpretation of the d_un union. This convention provides for simpler
108 * interpretation of dynamic tags by external tools. A tag whose value
109 * is an even number indicates a dynamic section entry that uses d_ptr.
110 * A tag whose value is an odd number indicates a dynamic section entry
111 * that uses d_val, or that uses neither d_ptr nor d_val.
112 *
113 * There are exceptions to the above rule:
114 * - Tags with values that are less than DT_ENCODING.
115 * - Tags with values that fall between DT_LOOS and DT_SUNW_ENCODING
116 * - Tags with values that fall between DT_HIOS and DT_LOPROC
117 *
118 * Third party tools must handle these exception ranges explicitly
119 * on an item by item basis.
120 */
121 #define DT_ENCODING 32 /* positive tag DT_* encoding rules */
122 /* start after this */
123 #define DT_PREINIT_ARRAY 32 /* pointer to .preinit_array */
124 #define DT_PREINIT_ARRAYSZ 33 /* size of .preinit_array */
125
126 #define DT_MAXPOSTAGS 34 /* number of positive tags */
127
128 /*
129 * DT_* encoding rules do not apply between DT_LOOS and DT_SUNW_ENCODING
130 */
131 #define DT_LOOS 0x6000000d /* OS specific range */
132 #define DT_SUNW_AUXILIARY 0x6000000d /* symbol auxiliary name */
133 #define DT_SUNW_RTLDINF 0x6000000e /* ld.so.1 info (private) */
134 #define DT_SUNW_FILTER 0x6000000f /* symbol filter name */
135 #define DT_SUNW_CAP 0x60000010 /* hardware/software */
136 /* capabilities */
137 #define DT_SUNW_SYMTAB 0x60000011 /* symtab with local fcn */
138 /* symbols immediately */
139 /* preceding DT_SYMTAB */
140 #define DT_SUNW_SYMSZ 0x60000012 /* Size of SUNW_SYMTAB table */
141
142 /*
143 * DT_* encoding rules apply between DT_SUNW_ENCODING and DT_HIOS
144 */
145 #define DT_SUNW_ENCODING 0x60000013 /* DT_* encoding rules resume */
146 /* after this */
147 #define DT_SUNW_SORTENT 0x60000013 /* sizeof [SYM|TLS]SORT entry */
148 #define DT_SUNW_SYMSORT 0x60000014 /* sym indices sorted by addr */
149 #define DT_SUNW_SYMSORTSZ 0x60000015 /* size of SUNW_SYMSORT */
150 #define DT_SUNW_TLSSORT 0x60000016 /* tls sym ndx sort by offset */
151 #define DT_SUNW_TLSSORTSZ 0x60000017 /* size of SUNW_TLSSORT */
152 #define DT_SUNW_CAPINFO 0x60000018 /* capabilities symbols */
153 #define DT_SUNW_STRPAD 0x60000019 /* # of unused bytes at the */
154 /* end of dynstr */
155 #define DT_SUNW_CAPCHAIN 0x6000001a /* capabilities chain info */
156 #define DT_SUNW_LDMACH 0x6000001b /* EM_ machine code of linker */
157 /* that produced object */
158 #define DT_SUNW_CAPCHAINENT 0x6000001d /* capabilities chain entry */
159 #define DT_SUNW_CAPCHAINSZ 0x6000001f /* capabilities chain size */
160
161 /*
162 * DT_* encoding rules do not apply between DT_HIOS and DT_LOPROC
163 */
164 #define DT_HIOS 0x6ffff000
165
166 /*
167 * The following values have been deprecated and remain here to allow
168 * compatibility with older binaries.
169 */
170 #define DT_DEPRECATED_SPARC_REGISTER 0x7000001
171
172 /*
173 * DT_* entries which fall between DT_VALRNGHI & DT_VALRNGLO use the
174 * Dyn.d_un.d_val field of the Elf*_Dyn structure.
175 */
176 #define DT_VALRNGLO 0x6ffffd00
177
178 #define DT_GNU_PRELINKED 0x6ffffdf5 /* prelinking timestamp (unused) */
179 #define DT_GNU_CONFLICTSZ 0x6ffffdf6 /* size of conflict section (unused) */
180 #define DT_GNU_LIBLISTSZ 0x6ffffdf7 /* size of library list (unused) */
181 #define DT_CHECKSUM 0x6ffffdf8 /* elf checksum */
182 #define DT_PLTPADSZ 0x6ffffdf9 /* pltpadding size */
183 #define DT_MOVEENT 0x6ffffdfa /* move table entry size */
184 #define DT_MOVESZ 0x6ffffdfb /* move table size */
185 #define DT_FEATURE_1 0x6ffffdfc /* feature holder (unused) */
186 #define DT_POSFLAG_1 0x6ffffdfd /* flags for DT_* entries, effecting */
187 /* the following DT_* entry. */
188 /* See DF_P1_* definitions */
189 #define DT_SYMINSZ 0x6ffffdfe /* syminfo table size (in bytes) */
190 #define DT_SYMINENT 0x6ffffdff /* syminfo entry size (in bytes) */
191 #define DT_VALRNGHI 0x6ffffdff
192
193 /*
194 * DT_* entries which fall between DT_ADDRRNGHI & DT_ADDRRNGLO use the
195 * Dyn.d_un.d_ptr field of the Elf*_Dyn structure.
196 *
197 * If any adjustment is made to the ELF object after it has been
198 * built, these entries will need to be adjusted.
199 */
200 #define DT_ADDRRNGLO 0x6ffffe00
201
202 #define DT_GNU_HASH 0x6ffffef5 /* GNU-style hash table (unused) */
203 #define DT_TLSDESC_PLT 0x6ffffef6 /* GNU (unused) */
204 #define DT_TLSDESC_GOT 0x6ffffef7 /* GNU (unused) */
205 #define DT_GNU_CONFLICT 0x6ffffef8 /* start of conflict section (unused) */
206 #define DT_GNU_LIBLIST 0x6ffffef9 /* Library list (unused) */
207
208 #define DT_CONFIG 0x6ffffefa /* configuration information */
209 #define DT_DEPAUDIT 0x6ffffefb /* dependency auditing */
210 #define DT_AUDIT 0x6ffffefc /* object auditing */
211 #define DT_PLTPAD 0x6ffffefd /* pltpadding (sparcv9) */
212 #define DT_MOVETAB 0x6ffffefe /* move table */
213 #define DT_SYMINFO 0x6ffffeff /* syminfo table */
214 #define DT_ADDRRNGHI 0x6ffffeff
215
216 /*
217 * The following DT_* entries should have been assigned within one of the
218 * DT_* ranges, but existed before such ranges had been established.
219 */
220 #define DT_VERSYM 0x6ffffff0 /* version symbol table - unused by */
221 /* Solaris (see libld/update.c) */
222
223 #define DT_RELACOUNT 0x6ffffff9 /* number of RELATIVE relocations */
224 #define DT_RELCOUNT 0x6ffffffa /* number of RELATIVE relocations */
225 #define DT_FLAGS_1 0x6ffffffb /* state flags - see DF_1_* defs */
226 #define DT_VERDEF 0x6ffffffc /* version definition table and */
227 #define DT_VERDEFNUM 0x6ffffffd /* associated no. of entries */
228 #define DT_VERNEED 0x6ffffffe /* version needed table and */
229 #define DT_VERNEEDNUM 0x6fffffff /* associated no. of entries */
230
231 /*
232 * DT_* entries between DT_HIPROC and DT_LOPROC are reserved for processor
233 * specific semantics.
234 *
235 * DT_* encoding rules apply to all tag values larger than DT_LOPROC.
236 */
237 #define DT_LOPROC 0x70000000 /* processor specific range */
238 #define DT_AUXILIARY 0x7ffffffd /* shared library auxiliary name */
239 #define DT_USED 0x7ffffffe /* ignored - same as needed */
240 #define DT_FILTER 0x7fffffff /* shared library filter name */
241 #define DT_HIPROC 0x7fffffff
242
243
244 /*
245 * Values for DT_FLAGS
246 */
247 #define DF_ORIGIN 0x00000001 /* ORIGIN processing required */
248 #define DF_SYMBOLIC 0x00000002 /* symbolic bindings in effect */
249 #define DF_TEXTREL 0x00000004 /* text relocations remain */
250 #define DF_BIND_NOW 0x00000008 /* process all relocations */
251 #define DF_STATIC_TLS 0x00000010 /* obj. contains static TLS refs */
252
253 /*
254 * Values for the DT_POSFLAG_1 .dynamic entry.
255 * These values only affect the following DT_* entry.
256 */
257 #define DF_P1_LAZYLOAD 0x00000001 /* following object is to be */
258 /* lazy loaded */
259 #define DF_P1_GROUPPERM 0x00000002 /* following object's symbols are */
260 /* not available for general */
261 /* symbol bindings. */
262 #define DF_P1_DEFERRED 0x00000004 /* following object is deferred */
263
264 /*
265 * Values for the DT_FLAGS_1 .dynamic entry.
266 */
267 #define DF_1_NOW 0x00000001 /* set RTLD_NOW for this object */
268 #define DF_1_GLOBAL 0x00000002 /* set RTLD_GLOBAL for this object */
269 #define DF_1_GROUP 0x00000004 /* set RTLD_GROUP for this object */
270 #define DF_1_NODELETE 0x00000008 /* set RTLD_NODELETE for this object */
271 #define DF_1_LOADFLTR 0x00000010 /* trigger filtee loading at runtime */
272 #define DF_1_INITFIRST 0x00000020 /* set RTLD_INITFIRST for this object */
273 #define DF_1_NOOPEN 0x00000040 /* set RTLD_NOOPEN for this object */
274 #define DF_1_ORIGIN 0x00000080 /* ORIGIN processing required */
275 #define DF_1_DIRECT 0x00000100 /* direct binding enabled */
276 #define DF_1_TRANS 0x00000200 /* unused obsolete name */
277 #define DF_1_INTERPOSE 0x00000400 /* object is an interposer */
278 #define DF_1_NODEFLIB 0x00000800 /* ignore default library search path */
279 #define DF_1_NODUMP 0x00001000 /* object can't be dldump(3x)'ed */
280 #define DF_1_CONFALT 0x00002000 /* configuration alternative created */
281 #define DF_1_ENDFILTEE 0x00004000 /* filtee terminates filters search */
282 #define DF_1_DISPRELDNE 0x00008000 /* disp reloc applied at build time */
283 #define DF_1_DISPRELPND 0x00010000 /* disp reloc applied at run-time */
284 #define DF_1_NODIRECT 0x00020000 /* object contains symbols that */
285 /* cannot be directly bound to */
286 #define DF_1_IGNMULDEF 0x00040000 /* internal: krtld ignore muldefs */
287 #define DF_1_NOKSYMS 0x00080000 /* internal: don't export object's */
288 /* symbols via /dev/ksyms */
289 #define DF_1_NOHDR 0x00100000 /* mapfile: 1st segment mapping */
290 /* omits ELF & program headers */
291 #define DF_1_EDITED 0x00200000 /* object has been modified since */
292 /* being built by 'ld' */
293 #define DF_1_NORELOC 0x00400000 /* internal: unrelocated object */
294 #define DF_1_SYMINTPOSE 0x00800000 /* individual symbol interposers */
295 /* exist */
296 #define DF_1_GLOBAUDIT 0x01000000 /* establish global auditing */
297 #define DF_1_SINGLETON 0x02000000 /* singleton symbols exist */
298
299 /*
300 * Values set to DT_FEATURE_1 tag's d_val (unused obsolete tag)
301 */
302 #define DTF_1_PARINIT 0x00000001 /* partially initialization feature */
303 #define DTF_1_CONFEXP 0x00000002 /* configuration file expected */
304
305
306 /*
307 * Version structures. There are three types of version structure:
308 *
309 * o A definition of the versions within the image itself.
310 * Each version definition is assigned a unique index (starting from
311 * VER_NDX_BGNDEF) which is used to cross-reference symbols associated to
312 * the version. Each version can have one or more dependencies on other
313 * version definitions within the image. The version name, and any
314 * dependency names, are specified in the version definition auxiliary
315 * array. Version definition entries require a version symbol index table.
316 *
317 * o A version requirement on a needed dependency. Each needed entry
318 * specifies the shared object dependency (as specified in DT_NEEDED).
319 * One or more versions required from this dependency are specified in the
320 * version needed auxiliary array.
321 *
322 * o A version symbol index table. Each symbol indexes into this array
323 * to determine its version index. Index values of VER_NDX_BGNDEF or
324 * greater indicate the version definition to which a symbol is associated.
325 * (the size of a symbol index entry is recorded in the sh_info field).
326 */
327 #ifndef _ASM
328
329 typedef struct { /* Version Definition Structure. */
330 Elf32_Half vd_version; /* this structures version revision */
331 Elf32_Half vd_flags; /* version information */
332 Elf32_Half vd_ndx; /* version index */
333 Elf32_Half vd_cnt; /* no. of associated aux entries */
334 Elf32_Word vd_hash; /* version name hash value */
335 Elf32_Word vd_aux; /* no. of bytes from start of this */
336 /* verdef to verdaux array */
337 Elf32_Word vd_next; /* no. of bytes from start of this */
338 } Elf32_Verdef; /* verdef to next verdef entry */
339
340 typedef struct { /* Verdef Auxiliary Structure. */
341 Elf32_Word vda_name; /* first element defines the version */
342 /* name. Additional entries */
343 /* define dependency names. */
344 Elf32_Word vda_next; /* no. of bytes from start of this */
345 } Elf32_Verdaux; /* verdaux to next verdaux entry */
346
347
348 typedef struct { /* Version Requirement Structure. */
349 Elf32_Half vn_version; /* this structures version revision */
350 Elf32_Half vn_cnt; /* no. of associated aux entries */
351 Elf32_Word vn_file; /* name of needed dependency (file) */
352 Elf32_Word vn_aux; /* no. of bytes from start of this */
353 /* verneed to vernaux array */
354 Elf32_Word vn_next; /* no. of bytes from start of this */
355 } Elf32_Verneed; /* verneed to next verneed entry */
356
357 typedef struct { /* Verneed Auxiliary Structure. */
358 Elf32_Word vna_hash; /* version name hash value */
359 Elf32_Half vna_flags; /* version information */
360 Elf32_Half vna_other;
361 Elf32_Word vna_name; /* version name */
362 Elf32_Word vna_next; /* no. of bytes from start of this */
363 } Elf32_Vernaux; /* vernaux to next vernaux entry */
364
365 typedef Elf32_Half Elf32_Versym; /* Version symbol index array */
366
367 typedef struct {
368 Elf32_Half si_boundto; /* direct bindings - symbol bound to */
369 Elf32_Half si_flags; /* per symbol flags */
370 } Elf32_Syminfo;
371
372
373 #if defined(_LP64) || defined(_LONGLONG_TYPE)
374 typedef struct {
375 Elf64_Half vd_version; /* this structures version revision */
376 Elf64_Half vd_flags; /* version information */
377 Elf64_Half vd_ndx; /* version index */
378 Elf64_Half vd_cnt; /* no. of associated aux entries */
379 Elf64_Word vd_hash; /* version name hash value */
380 Elf64_Word vd_aux; /* no. of bytes from start of this */
381 /* verdef to verdaux array */
382 Elf64_Word vd_next; /* no. of bytes from start of this */
383 } Elf64_Verdef; /* verdef to next verdef entry */
384
385 typedef struct {
386 Elf64_Word vda_name; /* first element defines the version */
387 /* name. Additional entries */
388 /* define dependency names. */
389 Elf64_Word vda_next; /* no. of bytes from start of this */
390 } Elf64_Verdaux; /* verdaux to next verdaux entry */
391
392 typedef struct {
393 Elf64_Half vn_version; /* this structures version revision */
394 Elf64_Half vn_cnt; /* no. of associated aux entries */
395 Elf64_Word vn_file; /* name of needed dependency (file) */
396 Elf64_Word vn_aux; /* no. of bytes from start of this */
397 /* verneed to vernaux array */
398 Elf64_Word vn_next; /* no. of bytes from start of this */
399 } Elf64_Verneed; /* verneed to next verneed entry */
400
401 typedef struct {
402 Elf64_Word vna_hash; /* version name hash value */
403 Elf64_Half vna_flags; /* version information */
404 Elf64_Half vna_other;
405 Elf64_Word vna_name; /* version name */
406 Elf64_Word vna_next; /* no. of bytes from start of this */
407 } Elf64_Vernaux; /* vernaux to next vernaux entry */
408
409 typedef Elf64_Half Elf64_Versym;
410
411 typedef struct {
412 Elf64_Half si_boundto; /* direct bindings - symbol bound to */
413 Elf64_Half si_flags; /* per symbol flags */
414 } Elf64_Syminfo;
415 #endif /* defined(_LP64) || defined(_LONGLONG_TYPE) */
416
417 #endif /* _ASM */
418
419 /*
420 * Versym symbol index values. Values greater than VER_NDX_GLOBAL
421 * and less then VER_NDX_LORESERVE associate symbols with user
422 * specified version descriptors.
423 */
424 #define VER_NDX_LOCAL 0 /* symbol is local */
425 #define VER_NDX_GLOBAL 1 /* symbol is global and assigned to */
426 /* the base version */
427 #define VER_NDX_LORESERVE 0xff00 /* beginning of RESERVED entries */
428 #define VER_NDX_ELIMINATE 0xff01 /* symbol is to be eliminated */
429
430 /*
431 * Verdef (vd_flags) and Vernaux (vna_flags) flags values.
432 */
433 #define VER_FLG_BASE 0x1 /* version definition of file itself */
434 /* (Verdef only) */
435 #define VER_FLG_WEAK 0x2 /* weak version identifier */
436 #define VER_FLG_INFO 0x4 /* version is recorded in object for */
437 /* informational purposes */
438 /* (Versym reference) only. No */
439 /* runtime verification is */
440 /* required. (Vernaux only) */
441
442 /*
443 * Verdef version values.
444 */
445 #define VER_DEF_NONE 0 /* Ver_def version */
446 #define VER_DEF_CURRENT 1
447 #define VER_DEF_NUM 2
448
449 /*
450 * Verneed version values.
451 */
452 #define VER_NEED_NONE 0 /* Ver_need version */
453 #define VER_NEED_CURRENT 1
454 #define VER_NEED_NUM 2
455
456
457 /*
458 * Syminfo flag values
459 */
460 #define SYMINFO_FLG_DIRECT 0x0001 /* symbol ref has direct association */
461 /* to object containing defn. */
462 #define SYMINFO_FLG_FILTER 0x0002 /* symbol ref is associated to a */
463 /* standard filter */
464 #define SYMINFO_FLG_PASSTHRU SYMINFO_FLG_FILTER /* unused obsolete name */
465 #define SYMINFO_FLG_COPY 0x0004 /* symbol is a copy-reloc */
466 #define SYMINFO_FLG_LAZYLOAD 0x0008 /* object containing defn. should be */
467 /* lazily-loaded */
468 #define SYMINFO_FLG_DIRECTBIND 0x0010 /* ref should be bound directly to */
469 /* object containing defn. */
470 #define SYMINFO_FLG_NOEXTDIRECT 0x0020 /* don't let an external reference */
471 /* directly bind to this symbol */
472 #define SYMINFO_FLG_AUXILIARY 0x0040 /* symbol ref is associated to a */
473 /* auxiliary filter */
474 #define SYMINFO_FLG_INTERPOSE 0x0080 /* symbol defines an interposer */
475 #define SYMINFO_FLG_CAP 0x0100 /* symbol is capabilities specific */
476 #define SYMINFO_FLG_DEFERRED 0x0200 /* symbol should not be included in */
477 /* BIND_NOW relocations */
478
479 /*
480 * Syminfo.si_boundto values.
481 */
482 #define SYMINFO_BT_SELF 0xffff /* symbol bound to self */
483 #define SYMINFO_BT_PARENT 0xfffe /* symbol bound to parent */
484 #define SYMINFO_BT_NONE 0xfffd /* no special symbol binding */
485 #define SYMINFO_BT_EXTERN 0xfffc /* symbol defined as external */
486 #define SYMINFO_BT_LOWRESERVE 0xff00 /* beginning of reserved entries */
487
488 /*
489 * Syminfo version values.
490 */
491 #define SYMINFO_NONE 0 /* Syminfo version */
492 #define SYMINFO_CURRENT 1
493 #define SYMINFO_NUM 2
494
495
496 /*
497 * Public structure defined and maintained within the runtime linker
498 */
499 #ifndef _ASM
500
501 typedef struct link_map Link_map;
502
503 struct link_map {
504 unsigned long l_addr; /* address at which object is mapped */
505 char *l_name; /* full name of loaded object */
506 #ifdef _LP64
507 Elf64_Dyn *l_ld; /* dynamic structure of object */
508 #else
509 Elf32_Dyn *l_ld; /* dynamic structure of object */
510 #endif
511 Link_map *l_next; /* next link object */
512 Link_map *l_prev; /* previous link object */
513 char *l_refname; /* filters reference name */
514 };
515
516 #ifdef _SYSCALL32
517 typedef struct link_map32 Link_map32;
518
519 struct link_map32 {
520 Elf32_Word l_addr;
521 Elf32_Addr l_name;
522 Elf32_Addr l_ld;
523 Elf32_Addr l_next;
524 Elf32_Addr l_prev;
525 Elf32_Addr l_refname;
526 };
527 #endif
528
529 typedef enum {
530 RT_CONSISTENT,
531 RT_ADD,
532 RT_DELETE
533 } r_state_e;
534
535 typedef enum {
536 RD_FL_NONE = 0, /* no flags */
537 RD_FL_ODBG = (1<<0), /* old style debugger present */
538 RD_FL_DBG = (1<<1) /* debugging enabled */
539 } rd_flags_e;
540
541
542
543 /*
544 * Debugging events enabled inside of the runtime linker. To
545 * access these events see the librtld_db interface.
546 */
547 typedef enum {
548 RD_NONE = 0, /* no event */
549 RD_PREINIT, /* the Initial rendezvous before .init */
550 RD_POSTINIT, /* the Second rendezvous after .init */
551 RD_DLACTIVITY /* a dlopen or dlclose has happened */
552 } rd_event_e;
553
554 struct r_debug {
555 int r_version; /* debugging info version no. */
556 Link_map *r_map; /* address of link_map */
557 unsigned long r_brk; /* address of update routine */
558 r_state_e r_state;
559 unsigned long r_ldbase; /* base addr of ld.so */
560 Link_map *r_ldsomap; /* address of ld.so.1's link map */
561 rd_event_e r_rdevent; /* debug event */
562 rd_flags_e r_flags; /* misc flags. */
563 };
564
565 #ifdef _SYSCALL32
566 struct r_debug32 {
567 Elf32_Word r_version; /* debugging info version no. */
568 Elf32_Addr r_map; /* address of link_map */
569 Elf32_Word r_brk; /* address of update routine */
570 r_state_e r_state;
571 Elf32_Word r_ldbase; /* base addr of ld.so */
572 Elf32_Addr r_ldsomap; /* address of ld.so.1's link map */
573 rd_event_e r_rdevent; /* debug event */
574 rd_flags_e r_flags; /* misc flags. */
575 };
576 #endif
577
578
579 #define R_DEBUG_VERSION 2 /* current r_debug version */
580 #endif /* _ASM */
581
582 /*
583 * Attribute/value structures used to bootstrap ELF-based dynamic linker.
584 */
585 #ifndef _ASM
586 typedef struct {
587 Elf32_Sword eb_tag; /* what this one is */
588 union { /* possible values */
589 Elf32_Word eb_val;
590 Elf32_Addr eb_ptr;
591 Elf32_Off eb_off;
592 } eb_un;
593 } Elf32_Boot;
594
595 #if defined(_LP64) || defined(_LONGLONG_TYPE)
596 typedef struct {
597 Elf64_Xword eb_tag; /* what this one is */
598 union { /* possible values */
599 Elf64_Xword eb_val;
600 Elf64_Addr eb_ptr;
601 Elf64_Off eb_off;
602 } eb_un;
603 } Elf64_Boot;
604 #endif /* defined(_LP64) || defined(_LONGLONG_TYPE) */
605 #endif /* _ASM */
606
607 /*
608 * Attributes
609 */
610 #define EB_NULL 0 /* (void) last entry */
611 #define EB_DYNAMIC 1 /* (*) dynamic structure of subject */
612 #define EB_LDSO_BASE 2 /* (caddr_t) base address of ld.so */
613 #define EB_ARGV 3 /* (caddr_t) argument vector */
614 #define EB_ENVP 4 /* (char **) environment strings */
615 #define EB_AUXV 5 /* (auxv_t *) auxiliary vector */
616 #define EB_DEVZERO 6 /* (int) fd for /dev/zero */
617 #define EB_PAGESIZE 7 /* (int) page size */
618 #define EB_MAX 8 /* number of "EBs" */
619 #define EB_MAX_SIZE32 64 /* size in bytes, _ILP32 */
620 #define EB_MAX_SIZE64 128 /* size in bytes, _LP64 */
621
622
623 #ifndef _ASM
624
625 #ifdef __STDC__
626
627 /*
628 * Concurrency communication structure for libc callbacks.
629 */
630 extern void _ld_libc(void *);
631 #else /* __STDC__ */
632 extern void _ld_libc();
633 #endif /* __STDC__ */
634
635 #pragma unknown_control_flow(_ld_libc)
636 #endif /* _ASM */
637
638 #ifdef __cplusplus
639 }
640 #endif
641
642 #endif /* _SYS_LINK_H */