xref: /titanic_41/usr/src/uts/common/sys/link.h (revision b59b3655028aeb11832ad679eb5c2577c2b75235)
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 2014 Garrett D'Amore <garrett@damore.org>
27  *
28  * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
29  */
30 
31 #ifndef _SYS_LINK_H
32 #define	_SYS_LINK_H
33 
34 #ifndef	_ASM
35 #include <sys/types.h>
36 #include <sys/elftypes.h>
37 #endif
38 
39 #ifdef	__cplusplus
40 extern "C" {
41 #endif
42 
43 /*
44  * Communication structures for the runtime linker.
45  */
46 
47 /*
48  * The following data structure provides a self-identifying union consisting
49  * of a tag from a known list and a value.
50  */
51 #ifndef	_ASM
52 typedef struct {
53 	Elf32_Sword d_tag;		/* how to interpret value */
54 	union {
55 		Elf32_Word	d_val;
56 		Elf32_Addr	d_ptr;
57 		Elf32_Off	d_off;
58 	} d_un;
59 } Elf32_Dyn;
60 
61 #if defined(_LP64) || defined(_LONGLONG_TYPE)
62 typedef struct {
63 	Elf64_Xword d_tag;		/* how to interpret value */
64 	union {
65 		Elf64_Xword	d_val;
66 		Elf64_Addr	d_ptr;
67 	} d_un;
68 } Elf64_Dyn;
69 #endif	/* defined(_LP64) || defined(_LONGLONG_TYPE) */
70 #endif	/* _ASM */
71 
72 /*
73  * Tag values
74  */
75 #define	DT_NULL		0	/* last entry in list */
76 #define	DT_NEEDED	1	/* a needed object */
77 #define	DT_PLTRELSZ	2	/* size of relocations for the PLT */
78 #define	DT_PLTGOT	3	/* addresses used by procedure linkage table */
79 #define	DT_HASH		4	/* hash table */
80 #define	DT_STRTAB	5	/* string table */
81 #define	DT_SYMTAB	6	/* symbol table */
82 #define	DT_RELA		7	/* addr of relocation entries */
83 #define	DT_RELASZ	8	/* size of relocation table */
84 #define	DT_RELAENT	9	/* base size of relocation entry */
85 #define	DT_STRSZ	10	/* size of string table */
86 #define	DT_SYMENT	11	/* size of symbol table entry */
87 #define	DT_INIT		12	/* _init addr */
88 #define	DT_FINI		13	/* _fini addr */
89 #define	DT_SONAME	14	/* name of this shared object */
90 #define	DT_RPATH	15	/* run-time search path */
91 #define	DT_SYMBOLIC	16	/* shared object linked -Bsymbolic */
92 #define	DT_REL		17	/* addr of relocation entries */
93 #define	DT_RELSZ	18	/* size of relocation table */
94 #define	DT_RELENT	19	/* base size of relocation entry */
95 #define	DT_PLTREL	20	/* relocation type for PLT entry */
96 #define	DT_DEBUG	21	/* pointer to r_debug structure */
97 #define	DT_TEXTREL	22	/* text relocations remain for this object */
98 #define	DT_JMPREL	23	/* pointer to the PLT relocation entries */
99 #define	DT_BIND_NOW	24	/* perform all relocations at load of object */
100 #define	DT_INIT_ARRAY	25	/* pointer to .init_array */
101 #define	DT_FINI_ARRAY	26	/* pointer to .fini_array */
102 #define	DT_INIT_ARRAYSZ	27	/* size of .init_array */
103 #define	DT_FINI_ARRAYSZ	28	/* size of .fini_array */
104 #define	DT_RUNPATH	29	/* run-time search path */
105 #define	DT_FLAGS	30	/* state flags - see DF_* */
106 
107 /*
108  * DT_* encoding rules: The value of each dynamic tag determines the
109  * interpretation of the d_un union. This convention provides for simpler
110  * interpretation of dynamic tags by external tools. A tag whose value
111  * is an even number indicates a dynamic section entry that uses d_ptr.
112  * A tag whose value is an odd number indicates a dynamic section entry
113  * that uses d_val, or that uses neither d_ptr nor d_val.
114  *
115  * There are exceptions to the above rule:
116  *	- Tags with values that are less than DT_ENCODING.
117  *	- Tags with values that fall between DT_LOOS and DT_SUNW_ENCODING
118  *	- Tags with values that fall between DT_HIOS and DT_LOPROC
119  *
120  * Third party tools must handle these exception ranges explicitly
121  * on an item by item basis.
122  */
123 #define	DT_ENCODING		32	/* positive tag DT_* encoding rules */
124 					/*	start after this */
125 #define	DT_PREINIT_ARRAY	32	/* pointer to .preinit_array */
126 #define	DT_PREINIT_ARRAYSZ	33	/* size of .preinit_array */
127 
128 #define	DT_MAXPOSTAGS		34	/* number of positive tags */
129 
130 /*
131  * DT_* encoding rules do not apply between DT_LOOS and DT_SUNW_ENCODING
132  */
133 #define	DT_LOOS			0x6000000d	/* OS specific range */
134 #define	DT_SUNW_AUXILIARY	0x6000000d	/* symbol auxiliary name */
135 #define	DT_SUNW_RTLDINF		0x6000000e	/* ld.so.1 info (private) */
136 #define	DT_SUNW_FILTER		0x6000000f	/* symbol filter name */
137 #define	DT_SUNW_CAP		0x60000010	/* hardware/software */
138 						/*	capabilities */
139 #define	DT_SUNW_SYMTAB		0x60000011	/* symtab with local fcn */
140 						/*	symbols immediately */
141 						/*	preceding DT_SYMTAB */
142 #define	DT_SUNW_SYMSZ		0x60000012	/* Size of SUNW_SYMTAB table */
143 
144 /*
145  * DT_* encoding rules apply between DT_SUNW_ENCODING and DT_HIOS
146  */
147 #define	DT_SUNW_ENCODING	0x60000013	/* DT_* encoding rules resume */
148 						/*	after this */
149 #define	DT_SUNW_SORTENT		0x60000013	/* sizeof [SYM|TLS]SORT entry */
150 #define	DT_SUNW_SYMSORT		0x60000014	/* sym indices sorted by addr */
151 #define	DT_SUNW_SYMSORTSZ	0x60000015	/* size of SUNW_SYMSORT */
152 #define	DT_SUNW_TLSSORT		0x60000016	/* tls sym ndx sort by offset */
153 #define	DT_SUNW_TLSSORTSZ	0x60000017	/* size of SUNW_TLSSORT */
154 #define	DT_SUNW_CAPINFO		0x60000018	/* capabilities symbols */
155 #define	DT_SUNW_STRPAD		0x60000019	/* # of unused bytes at the */
156 						/*	end of dynstr */
157 #define	DT_SUNW_CAPCHAIN	0x6000001a	/* capabilities chain info */
158 #define	DT_SUNW_LDMACH		0x6000001b	/* EM_ machine code of linker */
159 						/*	that produced object */
160 #define	DT_SUNW_CAPCHAINENT	0x6000001d	/* capabilities chain entry */
161 #define	DT_SUNW_CAPCHAINSZ	0x6000001f	/* capabilities chain size */
162 
163 /*
164  * DT_* encoding rules do not apply between DT_HIOS and DT_LOPROC
165  */
166 #define	DT_HIOS			0x6ffff000
167 
168 /*
169  * The following values have been deprecated and remain here to allow
170  * compatibility with older binaries.
171  */
172 #define	DT_DEPRECATED_SPARC_REGISTER	0x7000001
173 
174 /*
175  * DT_* entries which fall between DT_VALRNGHI & DT_VALRNGLO use the
176  * Dyn.d_un.d_val field of the Elf*_Dyn structure.
177  */
178 #define	DT_VALRNGLO	0x6ffffd00
179 
180 #define	DT_GNU_PRELINKED 0x6ffffdf5	/* prelinking timestamp (unused) */
181 #define	DT_GNU_CONFLICTSZ 0x6ffffdf6	/* size of conflict section (unused) */
182 #define	DT_GNU_LIBLISTSZ 0x6ffffdf7	/* size of library list (unused) */
183 #define	DT_CHECKSUM	0x6ffffdf8	/* elf checksum */
184 #define	DT_PLTPADSZ	0x6ffffdf9	/* pltpadding size */
185 #define	DT_MOVEENT	0x6ffffdfa	/* move table entry size */
186 #define	DT_MOVESZ	0x6ffffdfb	/* move table size */
187 #define	DT_FEATURE_1	0x6ffffdfc	/* feature holder (unused) */
188 #define	DT_POSFLAG_1	0x6ffffdfd	/* flags for DT_* entries, effecting */
189 					/*	the following DT_* entry. */
190 					/*	See DF_P1_* definitions */
191 #define	DT_SYMINSZ	0x6ffffdfe	/* syminfo table size (in bytes) */
192 #define	DT_SYMINENT	0x6ffffdff	/* syminfo entry size (in bytes) */
193 #define	DT_VALRNGHI	0x6ffffdff
194 
195 /*
196  * DT_* entries which fall between DT_ADDRRNGHI & DT_ADDRRNGLO use the
197  * Dyn.d_un.d_ptr field of the Elf*_Dyn structure.
198  *
199  * If any adjustment is made to the ELF object after it has been
200  * built, these entries will need to be adjusted.
201  */
202 #define	DT_ADDRRNGLO	0x6ffffe00
203 
204 #define	DT_GNU_HASH	0x6ffffef5	/* GNU-style hash table (unused) */
205 #define	DT_TLSDESC_PLT	0x6ffffef6	/* GNU (unused) */
206 #define	DT_TLSDESC_GOT	0x6ffffef7	/* GNU (unused) */
207 #define	DT_GNU_CONFLICT	0x6ffffef8	/* start of conflict section (unused) */
208 #define	DT_GNU_LIBLIST	0x6ffffef9	/* Library list (unused) */
209 
210 #define	DT_CONFIG	0x6ffffefa	/* configuration information */
211 #define	DT_DEPAUDIT	0x6ffffefb	/* dependency auditing */
212 #define	DT_AUDIT	0x6ffffefc	/* object auditing */
213 #define	DT_PLTPAD	0x6ffffefd	/* pltpadding (sparcv9) */
214 #define	DT_MOVETAB	0x6ffffefe	/* move table */
215 #define	DT_SYMINFO	0x6ffffeff	/* syminfo table */
216 #define	DT_ADDRRNGHI	0x6ffffeff
217 
218 /*
219  * The following DT_* entries should have been assigned within one of the
220  * DT_* ranges, but existed before such ranges had been established.
221  */
222 #define	DT_VERSYM	0x6ffffff0	/* version symbol table - unused by */
223 					/*	Solaris (see libld/update.c) */
224 
225 #define	DT_RELACOUNT	0x6ffffff9	/* number of RELATIVE relocations */
226 #define	DT_RELCOUNT	0x6ffffffa	/* number of RELATIVE relocations */
227 #define	DT_FLAGS_1	0x6ffffffb	/* state flags - see DF_1_* defs */
228 #define	DT_VERDEF	0x6ffffffc	/* version definition table and */
229 #define	DT_VERDEFNUM	0x6ffffffd	/*	associated no. of entries */
230 #define	DT_VERNEED	0x6ffffffe	/* version needed table and */
231 #define	DT_VERNEEDNUM	0x6fffffff	/* 	associated no. of entries */
232 
233 /*
234  * DT_* entries between DT_HIPROC and DT_LOPROC are reserved for processor
235  * specific semantics.
236  *
237  * DT_* encoding rules apply to all tag values larger than DT_LOPROC.
238  */
239 #define	DT_LOPROC	0x70000000	/* processor specific range */
240 #define	DT_AUXILIARY	0x7ffffffd	/* shared library auxiliary name */
241 #define	DT_USED		0x7ffffffe	/* ignored - same as needed */
242 #define	DT_FILTER	0x7fffffff	/* shared library filter name */
243 #define	DT_HIPROC	0x7fffffff
244 
245 
246 /*
247  * Values for DT_FLAGS
248  */
249 #define	DF_ORIGIN	0x00000001	/* ORIGIN processing required */
250 #define	DF_SYMBOLIC	0x00000002	/* symbolic bindings in effect */
251 #define	DF_TEXTREL	0x00000004	/* text relocations remain */
252 #define	DF_BIND_NOW	0x00000008	/* process all relocations */
253 #define	DF_STATIC_TLS	0x00000010	/* obj. contains static TLS refs */
254 
255 /*
256  * Values for the DT_POSFLAG_1 .dynamic entry.
257  * These values only affect the following DT_* entry.
258  */
259 #define	DF_P1_LAZYLOAD	0x00000001	/* following object is to be */
260 					/*	lazy loaded */
261 #define	DF_P1_GROUPPERM	0x00000002	/* following object's symbols are */
262 					/*	not available for general */
263 					/*	symbol bindings. */
264 #define	DF_P1_DEFERRED	0x00000004	/* following object is deferred */
265 
266 /*
267  * Values for the DT_FLAGS_1 .dynamic entry.
268  */
269 #define	DF_1_NOW	0x00000001	/* set RTLD_NOW for this object */
270 #define	DF_1_GLOBAL	0x00000002	/* set RTLD_GLOBAL for this object */
271 #define	DF_1_GROUP	0x00000004	/* set RTLD_GROUP for this object */
272 #define	DF_1_NODELETE	0x00000008	/* set RTLD_NODELETE for this object */
273 #define	DF_1_LOADFLTR	0x00000010	/* trigger filtee loading at runtime */
274 #define	DF_1_INITFIRST	0x00000020	/* set RTLD_INITFIRST for this object */
275 #define	DF_1_NOOPEN	0x00000040	/* set RTLD_NOOPEN for this object */
276 #define	DF_1_ORIGIN	0x00000080	/* ORIGIN processing required */
277 #define	DF_1_DIRECT	0x00000100	/* direct binding enabled */
278 #define	DF_1_TRANS	0x00000200	/* unused obsolete name */
279 #define	DF_1_INTERPOSE	0x00000400	/* object is an interposer */
280 #define	DF_1_NODEFLIB	0x00000800	/* ignore default library search path */
281 #define	DF_1_NODUMP	0x00001000	/* object can't be dldump(3x)'ed */
282 #define	DF_1_CONFALT	0x00002000	/* configuration alternative created */
283 #define	DF_1_ENDFILTEE	0x00004000	/* filtee terminates filters search */
284 #define	DF_1_DISPRELDNE	0x00008000	/* disp reloc applied at build time */
285 #define	DF_1_DISPRELPND	0x00010000	/* disp reloc applied at run-time */
286 #define	DF_1_NODIRECT	0x00020000	/* object contains symbols that */
287 					/*	cannot be directly bound to */
288 #define	DF_1_IGNMULDEF	0x00040000	/* internal: krtld ignore muldefs */
289 #define	DF_1_NOKSYMS	0x00080000	/* internal: don't export object's */
290 					/*	symbols via /dev/ksyms */
291 #define	DF_1_NOHDR	0x00100000	/* mapfile: 1st segment mapping */
292 					/*	omits ELF & program headers */
293 #define	DF_1_EDITED	0x00200000	/* object has been modified since */
294 					/*	being built by 'ld' */
295 #define	DF_1_NORELOC	0x00400000	/* internal: unrelocated object */
296 #define	DF_1_SYMINTPOSE	0x00800000	/* individual symbol interposers */
297 					/*	exist */
298 #define	DF_1_GLOBAUDIT	0x01000000	/* establish global auditing */
299 #define	DF_1_SINGLETON	0x02000000	/* singleton symbols exist */
300 
301 /*
302  * Values set to DT_FEATURE_1 tag's d_val (unused obsolete tag)
303  */
304 #define	DTF_1_PARINIT	0x00000001	/* partially initialization feature */
305 #define	DTF_1_CONFEXP	0x00000002	/* configuration file expected */
306 
307 
308 /*
309  * Version structures.  There are three types of version structure:
310  *
311  *  o	A definition of the versions within the image itself.
312  *	Each version definition is assigned a unique index (starting from
313  *	VER_NDX_BGNDEF)	which is used to cross-reference symbols associated to
314  *	the version.  Each version can have one or more dependencies on other
315  *	version definitions within the image.  The version name, and any
316  *	dependency names, are specified in the version definition auxiliary
317  *	array.  Version definition entries require a version symbol index table.
318  *
319  *  o	A version requirement on a needed dependency.  Each needed entry
320  *	specifies the shared object dependency (as specified in DT_NEEDED).
321  *	One or more versions required from this dependency are specified in the
322  *	version needed auxiliary array.
323  *
324  *  o	A version symbol index table.  Each symbol indexes into this array
325  *	to determine its version index.  Index values of VER_NDX_BGNDEF or
326  *	greater indicate the version definition to which a symbol is associated.
327  *	(the size of a symbol index entry is recorded in the sh_info field).
328  */
329 #ifndef	_ASM
330 
331 typedef struct {			/* Version Definition Structure. */
332 	Elf32_Half	vd_version;	/* this structures version revision */
333 	Elf32_Half	vd_flags;	/* version information */
334 	Elf32_Half	vd_ndx;		/* version index */
335 	Elf32_Half	vd_cnt;		/* no. of associated aux entries */
336 	Elf32_Word	vd_hash;	/* version name hash value */
337 	Elf32_Word	vd_aux;		/* no. of bytes from start of this */
338 					/*	verdef to verdaux array */
339 	Elf32_Word	vd_next;	/* no. of bytes from start of this */
340 } Elf32_Verdef;				/*	verdef to next verdef entry */
341 
342 typedef struct {			/* Verdef Auxiliary Structure. */
343 	Elf32_Word	vda_name;	/* first element defines the version */
344 					/*	name. Additional entries */
345 					/*	define dependency names. */
346 	Elf32_Word	vda_next;	/* no. of bytes from start of this */
347 } Elf32_Verdaux;			/*	verdaux to next verdaux entry */
348 
349 
350 typedef	struct {			/* Version Requirement Structure. */
351 	Elf32_Half	vn_version;	/* this structures version revision */
352 	Elf32_Half	vn_cnt;		/* no. of associated aux entries */
353 	Elf32_Word	vn_file;	/* name of needed dependency (file) */
354 	Elf32_Word	vn_aux;		/* no. of bytes from start of this */
355 					/*	verneed to vernaux array */
356 	Elf32_Word	vn_next;	/* no. of bytes from start of this */
357 } Elf32_Verneed;			/*	verneed to next verneed entry */
358 
359 typedef struct {			/* Verneed Auxiliary Structure. */
360 	Elf32_Word	vna_hash;	/* version name hash value */
361 	Elf32_Half	vna_flags;	/* version information */
362 	Elf32_Half	vna_other;
363 	Elf32_Word	vna_name;	/* version name */
364 	Elf32_Word	vna_next;	/* no. of bytes from start of this */
365 } Elf32_Vernaux;			/*	vernaux to next vernaux entry */
366 
367 typedef	Elf32_Half 	Elf32_Versym;	/* Version symbol index array */
368 
369 typedef struct {
370 	Elf32_Half	si_boundto;	/* direct bindings - symbol bound to */
371 	Elf32_Half	si_flags;	/* per symbol flags */
372 } Elf32_Syminfo;
373 
374 
375 #if defined(_LP64) || defined(_LONGLONG_TYPE)
376 typedef struct {
377 	Elf64_Half	vd_version;	/* this structures version revision */
378 	Elf64_Half	vd_flags;	/* version information */
379 	Elf64_Half	vd_ndx;		/* version index */
380 	Elf64_Half	vd_cnt;		/* no. of associated aux entries */
381 	Elf64_Word	vd_hash;	/* version name hash value */
382 	Elf64_Word	vd_aux;		/* no. of bytes from start of this */
383 					/*	verdef to verdaux array */
384 	Elf64_Word	vd_next;	/* no. of bytes from start of this */
385 } Elf64_Verdef;				/*	verdef to next verdef entry */
386 
387 typedef struct {
388 	Elf64_Word	vda_name;	/* first element defines the version */
389 					/*	name. Additional entries */
390 					/*	define dependency names. */
391 	Elf64_Word	vda_next;	/* no. of bytes from start of this */
392 } Elf64_Verdaux;			/*	verdaux to next verdaux entry */
393 
394 typedef struct {
395 	Elf64_Half	vn_version;	/* this structures version revision */
396 	Elf64_Half	vn_cnt;		/* no. of associated aux entries */
397 	Elf64_Word	vn_file;	/* name of needed dependency (file) */
398 	Elf64_Word	vn_aux;		/* no. of bytes from start of this */
399 					/*	verneed to vernaux array */
400 	Elf64_Word	vn_next;	/* no. of bytes from start of this */
401 } Elf64_Verneed;			/*	verneed to next verneed entry */
402 
403 typedef struct {
404 	Elf64_Word	vna_hash;	/* version name hash value */
405 	Elf64_Half	vna_flags;	/* version information */
406 	Elf64_Half	vna_other;
407 	Elf64_Word	vna_name;	/* version name */
408 	Elf64_Word	vna_next;	/* no. of bytes from start of this */
409 } Elf64_Vernaux;			/*	vernaux to next vernaux entry */
410 
411 typedef	Elf64_Half	Elf64_Versym;
412 
413 typedef struct {
414 	Elf64_Half	si_boundto;	/* direct bindings - symbol bound to */
415 	Elf64_Half	si_flags;	/* per symbol flags */
416 } Elf64_Syminfo;
417 #endif	/* defined(_LP64) || defined(_LONGLONG_TYPE) */
418 
419 #endif	/* _ASM */
420 
421 /*
422  * Versym symbol index values.  Values greater than VER_NDX_GLOBAL
423  * and less then VER_NDX_LORESERVE associate symbols with user
424  * specified version descriptors.
425  */
426 #define	VER_NDX_LOCAL		0	/* symbol is local */
427 #define	VER_NDX_GLOBAL		1	/* symbol is global and assigned to */
428 					/*	the base version */
429 #define	VER_NDX_LORESERVE	0xff00	/* beginning of RESERVED entries */
430 #define	VER_NDX_ELIMINATE	0xff01	/* symbol is to be eliminated */
431 
432 /*
433  * Verdef (vd_flags) and Vernaux (vna_flags) flags values.
434  */
435 #define	VER_FLG_BASE		0x1	/* version definition of file itself */
436 					/*	(Verdef only) */
437 #define	VER_FLG_WEAK		0x2	/* weak version identifier */
438 #define	VER_FLG_INFO		0x4	/* version is recorded in object for */
439 					/*	informational purposes */
440 					/*	(Versym reference) only. No */
441 					/*	runtime verification is */
442 					/*	required. (Vernaux only) */
443 
444 /*
445  * Verdef version values.
446  */
447 #define	VER_DEF_NONE		0	/* Ver_def version */
448 #define	VER_DEF_CURRENT		1
449 #define	VER_DEF_NUM		2
450 
451 /*
452  * Verneed version values.
453  */
454 #define	VER_NEED_NONE		0	/* Ver_need version */
455 #define	VER_NEED_CURRENT	1
456 #define	VER_NEED_NUM		2
457 
458 
459 /*
460  * Syminfo flag values
461  */
462 #define	SYMINFO_FLG_DIRECT	0x0001	/* symbol ref has direct association */
463 					/*	to object containing defn. */
464 #define	SYMINFO_FLG_FILTER	0x0002	/* symbol ref is associated to a */
465 					/* 	standard filter */
466 #define	SYMINFO_FLG_PASSTHRU	SYMINFO_FLG_FILTER /* unused obsolete name */
467 #define	SYMINFO_FLG_COPY	0x0004	/* symbol is a copy-reloc */
468 #define	SYMINFO_FLG_LAZYLOAD	0x0008	/* object containing defn. should be */
469 					/*	lazily-loaded */
470 #define	SYMINFO_FLG_DIRECTBIND	0x0010	/* ref should be bound directly to */
471 					/*	object containing defn. */
472 #define	SYMINFO_FLG_NOEXTDIRECT	0x0020	/* don't let an external reference */
473 					/*	directly bind to this symbol */
474 #define	SYMINFO_FLG_AUXILIARY	0x0040	/* symbol ref is associated to a */
475 					/* 	auxiliary filter */
476 #define	SYMINFO_FLG_INTERPOSE	0x0080	/* symbol defines an interposer */
477 #define	SYMINFO_FLG_CAP		0x0100	/* symbol is capabilities specific */
478 #define	SYMINFO_FLG_DEFERRED	0x0200	/* symbol should not be included in */
479 					/*	BIND_NOW relocations */
480 
481 /*
482  * Syminfo.si_boundto values.
483  */
484 #define	SYMINFO_BT_SELF		0xffff	/* symbol bound to self */
485 #define	SYMINFO_BT_PARENT	0xfffe	/* symbol bound to parent */
486 #define	SYMINFO_BT_NONE		0xfffd	/* no special symbol binding */
487 #define	SYMINFO_BT_EXTERN	0xfffc	/* symbol defined as external */
488 #define	SYMINFO_BT_LOWRESERVE	0xff00	/* beginning of reserved entries */
489 
490 /*
491  * Syminfo version values.
492  */
493 #define	SYMINFO_NONE		0	/* Syminfo version */
494 #define	SYMINFO_CURRENT		1
495 #define	SYMINFO_NUM		2
496 
497 
498 /*
499  * Public structure defined and maintained within the runtime linker
500  */
501 #ifndef	_ASM
502 
503 typedef struct link_map	Link_map;
504 
505 struct link_map {
506 	unsigned long	l_addr;		/* address at which object is mapped */
507 	char 		*l_name;	/* full name of loaded object */
508 #ifdef _LP64
509 	Elf64_Dyn	*l_ld;		/* dynamic structure of object */
510 #else
511 	Elf32_Dyn	*l_ld;		/* dynamic structure of object */
512 #endif
513 	Link_map	*l_next;	/* next link object */
514 	Link_map	*l_prev;	/* previous link object */
515 	char		*l_refname;	/* filters reference name */
516 };
517 
518 #ifdef _SYSCALL32
519 typedef struct link_map32 Link_map32;
520 
521 struct link_map32 {
522 	Elf32_Word	l_addr;
523 	Elf32_Addr	l_name;
524 	Elf32_Addr	l_ld;
525 	Elf32_Addr	l_next;
526 	Elf32_Addr	l_prev;
527 	Elf32_Addr	l_refname;
528 };
529 #endif
530 
531 typedef enum {
532 	RT_CONSISTENT,
533 	RT_ADD,
534 	RT_DELETE
535 } r_state_e;
536 
537 typedef enum {
538 	RD_FL_NONE = 0,		/* no flags */
539 	RD_FL_ODBG = (1<<0),	/* old style debugger present */
540 	RD_FL_DBG = (1<<1)	/* debugging enabled */
541 } rd_flags_e;
542 
543 
544 
545 /*
546  * Debugging events enabled inside of the runtime linker.  To
547  * access these events see the librtld_db interface.
548  */
549 typedef enum {
550 	RD_NONE = 0,		/* no event */
551 	RD_PREINIT,		/* the Initial rendezvous before .init */
552 	RD_POSTINIT,		/* the Second rendezvous after .init */
553 	RD_DLACTIVITY		/* a dlopen or dlclose has happened */
554 } rd_event_e;
555 
556 struct r_debug {
557 	int		r_version;	/* debugging info version no. */
558 	Link_map	*r_map;		/* address of link_map */
559 	unsigned long	r_brk;		/* address of update routine */
560 	r_state_e	r_state;
561 	unsigned long	r_ldbase;	/* base addr of ld.so */
562 	Link_map	*r_ldsomap;	/* address of ld.so.1's link map */
563 	rd_event_e	r_rdevent;	/* debug event */
564 	rd_flags_e	r_flags;	/* misc flags. */
565 };
566 
567 #ifdef _SYSCALL32
568 struct r_debug32 {
569 	Elf32_Word	r_version;	/* debugging info version no. */
570 	Elf32_Addr	r_map;		/* address of link_map */
571 	Elf32_Word	r_brk;		/* address of update routine */
572 	r_state_e	r_state;
573 	Elf32_Word	r_ldbase;	/* base addr of ld.so */
574 	Elf32_Addr	r_ldsomap;	/* address of ld.so.1's link map */
575 	rd_event_e	r_rdevent;	/* debug event */
576 	rd_flags_e	r_flags;	/* misc flags. */
577 };
578 #endif
579 
580 
581 #define	R_DEBUG_VERSION	2		/* current r_debug version */
582 #endif	/* _ASM */
583 
584 /*
585  * Attribute/value structures used to bootstrap ELF-based dynamic linker.
586  */
587 #ifndef	_ASM
588 typedef struct {
589 	Elf32_Sword eb_tag;		/* what this one is */
590 	union {				/* possible values */
591 		Elf32_Word eb_val;
592 		Elf32_Addr eb_ptr;
593 		Elf32_Off  eb_off;
594 	} eb_un;
595 } Elf32_Boot;
596 
597 #if defined(_LP64) || defined(_LONGLONG_TYPE)
598 typedef struct {
599 	Elf64_Xword eb_tag;		/* what this one is */
600 	union {				/* possible values */
601 		Elf64_Xword eb_val;
602 		Elf64_Addr eb_ptr;
603 		Elf64_Off eb_off;
604 	} eb_un;
605 } Elf64_Boot;
606 #endif	/* defined(_LP64) || defined(_LONGLONG_TYPE) */
607 #endif	/* _ASM */
608 
609 /*
610  * Attributes
611  */
612 #define	EB_NULL		0		/* (void) last entry */
613 #define	EB_DYNAMIC	1		/* (*) dynamic structure of subject */
614 #define	EB_LDSO_BASE	2		/* (caddr_t) base address of ld.so */
615 #define	EB_ARGV		3		/* (caddr_t) argument vector */
616 #define	EB_ENVP		4		/* (char **) environment strings */
617 #define	EB_AUXV		5		/* (auxv_t *) auxiliary vector */
618 #define	EB_DEVZERO	6		/* (int) fd for /dev/zero */
619 #define	EB_PAGESIZE	7		/* (int) page size */
620 #define	EB_MAX		8		/* number of "EBs" */
621 #define	EB_MAX_SIZE32	64		/* size in bytes, _ILP32 */
622 #define	EB_MAX_SIZE64	128		/* size in bytes, _LP64 */
623 
624 
625 #ifndef	_ASM
626 
627 /*
628  * Concurrency communication structure for libc callbacks.
629  */
630 extern void	_ld_libc(void *);
631 
632 #pragma unknown_control_flow(_ld_libc)
633 #endif /* _ASM */
634 
635 #ifdef	__cplusplus
636 }
637 #endif
638 
639 #endif	/* _SYS_LINK_H */
640