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) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
27 */
28
29 #ifndef _LIBLD_H
30 #define _LIBLD_H
31
32 #include <stdlib.h>
33 #include <libelf.h>
34 #include <sgs.h>
35 #include <_machelf.h>
36 #include <string_table.h>
37 #include <sys/avl.h>
38 #include <alist.h>
39 #include <elfcap.h>
40
41 #ifdef __cplusplus
42 extern "C" {
43 #endif
44
45 /*
46 * Default directory search path manipulation for the link-editor. YLDIR
47 * indicates which directory in LIBPATH is replaced by the -YL option to cc
48 * and ld. YUDIR indicates which directory is replaced by -YU.
49 */
50 #define YLDIR 1
51 #define YUDIR 2
52
53 /*
54 * Define a hash value that can never be returned from elf_hash().
55 */
56 #define SYM_NOHASH (~(Word)0)
57
58 /*
59 * Macro that can be used to represent both ORDER flags
60 * in a section header.
61 */
62 #define ALL_SHF_ORDER (SHF_ORDERED | SHF_LINK_ORDER)
63
64 /*
65 * The linker merges (concatenates) sections with the same name and
66 * compatible section header flags. When comparing these flags,
67 * there are some that should not be included in the decision.
68 * The ALL_SHF_IGNORE constant defines these flags.
69 *
70 * NOTE: SHF_MERGE|SHF_STRINGS:
71 * The compiler is allowed to set the SHF_MERGE|SHF_STRINGS flags in
72 * order to tell the linker that:
73 *
74 * 1) There is nothing in the section except null terminated strings.
75 * 2) Those strings do not contain NULL bytes, except as termination.
76 * 3) All references to these strings occur via standard relocation
77 * records.
78 *
79 * As a result, if two compatible sections both have these flags set, it is
80 * OK to combine the strings they contain into a single merged string table
81 * with duplicates removed and tail strings merged.
82 *
83 * This is a different meaning than the simple concatenating of sections
84 * that the linker always does. It is a hint that an additional optimization
85 * is possible, but not required. This means that sections that do not
86 * share the same SHF_MERGE|SHF_STRINGS values can be concatenated,
87 * but cannot have their duplicate strings combined. Hence, the
88 * SHF_MERGE|SHF_STRINGS flags should be ignored when deciding whether
89 * two sections can be concatenated.
90 */
91 #define ALL_SHF_IGNORE (ALL_SHF_ORDER | SHF_GROUP | SHF_MERGE | SHF_STRINGS)
92
93 /*
94 * Define symbol reference types for use in symbol resolution.
95 */
96 typedef enum {
97 REF_DYN_SEEN, /* a .so symbol has been seen */
98 REF_DYN_NEED, /* a .so symbol satisfies a .o symbol */
99 REF_REL_NEED, /* a .o symbol */
100 REF_NUM /* the number of symbol references */
101 } Symref;
102
103 /*
104 * Relocation descriptor cache
105 */
106 struct rel_cache {
107 APlist *rc_list; /* list of Rel_cachebuf */
108 Word rc_cnt; /* and count */
109 };
110
111 /*
112 * GOT reference models
113 */
114 typedef enum {
115 GOT_REF_GENERIC, /* generic symbol reference */
116 GOT_REF_TLSIE, /* TLS initial exec (gnu) reference */
117 GOT_REF_TLSLD, /* TLS local dynamic reference */
118 GOT_REF_TLSGD /* TLS general dynamic reference */
119 } Gotref;
120
121 typedef struct {
122 Xword gn_addend; /* addend associated with GOT entry */
123 Sword gn_gotndx; /* GOT table index */
124 Gotref gn_gotref;
125 } Gotndx;
126
127 /*
128 * Got debugging structure. The got index is defined as a signed value as we
129 * do so much mucking around with negative and positive gots on SPARC, and sign
130 * extension is necessary when building 64-bit objects. On intel we explicitly
131 * cast this variable to an unsigned value.
132 */
133 typedef struct {
134 Sym_desc *gt_sym;
135 Gotndx gt_gndx;
136 } Gottable;
137
138 /*
139 * The link-editor caches the results of sloppy relocation processing
140 * in a variable of type Rlxrel_cache. Symbols come for processing in sorted
141 * order, so a single item cache suffices to eliminate duplicate lookups.
142 *
143 * When sloppy relocation processing fails, the Rlxrel_rej enum reports
144 * the underlying reason.
145 */
146 typedef enum {
147 RLXREL_REJ_NONE = 0, /* Replacement symbol was found */
148 RLXREL_REJ_TARGET, /* Target sec disallows relaxed relocations */
149 RLXREL_REJ_SECTION, /* Either there is no replacement section, */
150 /* or its attributes are incompatible */
151 RLXREL_REJ_SYMBOL, /* Replacement symbol not found */
152 } Rlxrel_rej;
153
154 typedef struct sreloc_cache {
155 Sym_desc *sr_osdp; /* Original symbol */
156 Sym_desc *sr_rsdp; /* Replacement symbol */
157 Rlxrel_rej sr_rej; /* Reason for failure if NULL sr_rsdp */
158 } Rlxrel_cache;
159
160 /*
161 * Nodes in an ofl_wrap AVL tree
162 *
163 * wsn_name is the name of the symbol to be wrapped. wsn_wrapname is used
164 * when we need to refer to the wrap symbol, and consists of the symbol
165 * name with a __wrap_ prefix.
166 */
167 typedef struct wrap_sym_node {
168 avl_node_t wsn_avlnode; /* AVL book-keeping */
169 const char *wsn_name; /* Symbol name: XXX */
170 const char *wsn_wrapname; /* Wrap symbol name: __wrap_XXX */
171 } WrapSymNode;
172
173 /*
174 * Capabilities structures, used to maintain a capabilities set.
175 *
176 * Capabilities can be defined within input relocatable objects, and can be
177 * augmented or replaced by mapfile directives. In addition, mapfile directives
178 * can be used to exclude capabilities that would otherwise be carried over to
179 * the output object.
180 *
181 * CA_SUNW_HW_1, CA_SUNW_SF_1 and CA_SUNW_HW_2 values are bitmasks. A current
182 * value, and an exclude value are maintained for each capability.
183 *
184 * There can be multiple CA_SUNW_PLAT and CA_SUNW_MACH entries and thus Alists
185 * are used to collect these entries. A current list for each capability is
186 * maintained as Capstr entries, which provide for maintaining the strings
187 * eventual index into a string table. An exclude list is maintained as a
188 * list of string pointers.
189 */
190 typedef struct {
191 elfcap_mask_t cm_val; /* bitmask value */
192 elfcap_mask_t cm_exc; /* bits to exclude from final object */
193 } Capmask;
194
195 typedef struct {
196 Alist *cl_val; /* string (Capstr) value */
197 APlist *cl_exc; /* strings to exclude from final */
198 } Caplist; /* object */
199
200 typedef struct {
201 char *cs_str; /* platform or machine name */
202 Word cs_ndx; /* the entries output Cap index */
203 } Capstr;
204
205 typedef uint_t oc_flag_t;
206 typedef struct {
207 Capmask oc_hw_1; /* CA_SUNW_HW_1 capabilities */
208 Capmask oc_sf_1; /* CA_SUNW_SF_1 capabilities */
209 Capmask oc_hw_2; /* CA_SUNW_HW_2 capabilities */
210 Caplist oc_plat; /* CA_SUNW_PLAT capabilities */
211 Caplist oc_mach; /* CA_SUNW_MACH capabilities */
212 Capstr oc_id; /* CA_SUNW_ID capability */
213 oc_flag_t oc_flags;
214 } Objcapset;
215
216 #define FLG_OCS_USRDEFID 0x1 /* user defined CA_SUNW_ID */
217
218 /*
219 * Bitmasks for a single capability. Capabilities come from input objects,
220 * augmented or replaced by mapfile directives. In addition, mapfile directives
221 * can be used to exclude bits that would otherwise be set in the output object.
222 */
223 typedef struct {
224 elfcap_mask_t cm_value; /* Bitmask value */
225 elfcap_mask_t cm_exclude; /* Bits to remove from final object */
226 } CapMask;
227
228 /*
229 * Combine the bitmask in a CapMask with the exclusion mask and
230 * return the resulting final value.
231 */
232 #define CAPMASK_VALUE(_cbmp) ((_cbmp)->cm_value & ~(_cbmp)->cm_exclude)
233
234 typedef struct {
235 CapMask c_hw_1; /* CA_SUNW_HW_1 capabilities */
236 CapMask c_sf_1; /* CA_SUNW_SF_1 capabilities */
237 CapMask c_hw_2; /* CA_SUNW_HW_2 capabilities */
238 } Outcapset;
239
240
241 /*
242 * Output file processing structure
243 */
244 typedef Lword ofl_flag_t;
245 typedef Word ofl_guideflag_t;
246 struct ofl_desc {
247 char *ofl_sgsid; /* link-editor identification */
248 const char *ofl_name; /* full file name */
249 Elf *ofl_elf; /* elf_memory() elf descriptor */
250 Elf *ofl_welf; /* ELF_C_WRITE elf descriptor */
251 Ehdr *ofl_dehdr; /* default elf header, and new elf */
252 Ehdr *ofl_nehdr; /* header describing this file */
253 Phdr *ofl_phdr; /* program header descriptor */
254 Phdr *ofl_tlsphdr; /* TLS phdr */
255 int ofl_fd; /* file descriptor */
256 size_t ofl_size; /* image size */
257 APlist *ofl_maps; /* list of input mapfiles */
258 APlist *ofl_segs; /* list of segments */
259 APlist *ofl_segs_order; /* SEGMENT_ORDER segments */
260 avl_tree_t ofl_segs_avl; /* O(log N) access to named segments */
261 APlist *ofl_ents; /* list of entrance descriptors */
262 avl_tree_t ofl_ents_avl; /* O(log N) access to named ent. desc */
263 APlist *ofl_objs; /* relocatable object file list */
264 Word ofl_objscnt; /* and count */
265 APlist *ofl_ars; /* archive library list */
266 Word ofl_arscnt; /* and count */
267 int ofl_ars_gsandx; /* archive group argv index. 0 means */
268 /* no current group, < 0 means */
269 /* error reported. >0 is cur ndx */
270 Word ofl_ars_gsndx; /* current -zrescan-start ofl_ars ndx */
271 APlist *ofl_sos; /* shared object list */
272 Word ofl_soscnt; /* and count */
273 APlist *ofl_soneed; /* list of implicitly required .so's */
274 APlist *ofl_socntl; /* list of .so control definitions */
275 Rel_cache ofl_outrels; /* list of output relocations */
276 Rel_cache ofl_actrels; /* list of relocations to perform */
277 APlist *ofl_relaux; /* Rel_aux cache for outrels/actrels */
278 Word ofl_entrelscnt; /* no of relocations entered */
279 Alist *ofl_copyrels; /* list of copy relocations */
280 APlist *ofl_ordered; /* list of shf_ordered sections */
281 APlist *ofl_symdtent; /* list of syminfo symbols that need */
282 /* to reference .dynamic entries */
283 APlist *ofl_ismove; /* list of .SUNW_move sections */
284 APlist *ofl_ismoverel; /* list of relocation input section */
285 /* targeting to expanded area */
286 APlist *ofl_parsyms; /* list of partially initialized */
287 /* symbols (ie. move symbols) */
288 APlist *ofl_extrarels; /* relocation sections which have */
289 /* a NULL sh_info */
290 avl_tree_t *ofl_groups; /* pointer to head of Groups AVL tree */
291 APlist *ofl_initarray; /* list of init array func names */
292 APlist *ofl_finiarray; /* list of fini array func names */
293 APlist *ofl_preiarray; /* list of preinit array func names */
294 APlist *ofl_rtldinfo; /* list of rtldinfo syms */
295 APlist *ofl_osgroups; /* list of output GROUP sections */
296 APlist *ofl_ostlsseg; /* pointer to sections in TLS segment */
297 APlist *ofl_unwind; /* list of unwind output sections */
298 Os_desc *ofl_unwindhdr; /* Unwind hdr */
299 avl_tree_t ofl_symavl; /* pointer to head of Syms AVL tree */
300 Sym_desc **ofl_regsyms; /* array of potential register */
301 Word ofl_regsymsno; /* symbols and array count */
302 Word ofl_regsymcnt; /* no. of output register symbols */
303 Word ofl_lregsymcnt; /* no. of local register symbols */
304 Sym_desc *ofl_dtracesym; /* ld -zdtrace= */
305 ofl_flag_t ofl_flags; /* various state bits, args etc. */
306 ofl_flag_t ofl_flags1; /* more flags */
307 void *ofl_entry; /* entry point (-e and Sym_desc *) */
308 char *ofl_filtees; /* shared objects we are a filter for */
309 const char *ofl_soname; /* (-h option) output file name for */
310 /* dynamic structure */
311 const char *ofl_interp; /* interpreter name used by exec() */
312 char *ofl_rpath; /* run path to store in .dynamic */
313 char *ofl_config; /* config path to store in .dynamic */
314 APlist *ofl_ulibdirs; /* user supplied library search list */
315 APlist *ofl_dlibdirs; /* default library search list */
316 Word ofl_vercnt; /* number of versions to generate */
317 APlist *ofl_verdesc; /* list of version descriptors */
318 size_t ofl_verdefsz; /* size of version definition section */
319 size_t ofl_verneedsz; /* size of version needed section */
320 Word ofl_entercnt; /* no. of global symbols entered */
321 Word ofl_globcnt; /* no. of global symbols to output */
322 Word ofl_scopecnt; /* no. of scoped symbols to output */
323 Word ofl_dynscopecnt; /* no. scoped syms in .SUNW_ldynsym */
324 Word ofl_elimcnt; /* no. of eliminated symbols */
325 Word ofl_locscnt; /* no. of local symbols in .symtab */
326 Word ofl_dynlocscnt; /* no. local symbols in .SUNW_ldynsym */
327 Word ofl_dynsymsortcnt; /* no. ndx in .SUNW_dynsymsort */
328 Word ofl_dyntlssortcnt; /* no. ndx in .SUNW_dyntlssort */
329 Word ofl_dynshdrcnt; /* no. of output section in .dynsym */
330 Word ofl_shdrcnt; /* no. of output sections */
331 Word ofl_caploclcnt; /* no. of local capabilities symbols */
332 Word ofl_capsymcnt; /* no. of symbol capabilities entries */
333 /* required */
334 Word ofl_capchaincnt; /* no. of Capchain symbols */
335 APlist *ofl_capgroups; /* list of capabilities groups */
336 avl_tree_t *ofl_capfamilies; /* capability family AVL tree */
337 Str_tbl *ofl_shdrsttab; /* Str_tbl for shdr strtab */
338 Str_tbl *ofl_strtab; /* Str_tbl for symtab strtab */
339 Str_tbl *ofl_dynstrtab; /* Str_tbl for dymsym strtab */
340 Gotndx *ofl_tlsldgotndx; /* index to LD TLS_index structure */
341 Xword ofl_relocsz; /* size of output relocations */
342 Xword ofl_relocgotsz; /* size of .got relocations */
343 Xword ofl_relocpltsz; /* size of .plt relocations */
344 Xword ofl_relocbsssz; /* size of .bss (copy) relocations */
345 Xword ofl_relocrelsz; /* size of .rel[a] relocations */
346 Word ofl_relocincnt; /* no. of input relocations */
347 Word ofl_reloccnt; /* tot number of output relocations */
348 Word ofl_reloccntsub; /* tot numb of output relocations to */
349 /* skip (-zignore) */
350 Word ofl_relocrelcnt; /* tot number of relative */
351 /* relocations */
352 Word ofl_gotcnt; /* no. of .got entries */
353 Word ofl_pltcnt; /* no. of .plt entries */
354 Word ofl_pltpad; /* no. of .plt padd entries */
355 Word ofl_hashbkts; /* no. of hash buckets required */
356 Is_desc *ofl_isbss; /* .bss input section (globals) */
357 Is_desc *ofl_islbss; /* .lbss input section (globals) */
358 Is_desc *ofl_istlsbss; /* .tlsbss input section (globals) */
359 Is_desc *ofl_isparexpn; /* -z nopartial .data input section */
360 Os_desc *ofl_osdynamic; /* .dynamic output section */
361 Os_desc *ofl_osdynsym; /* .dynsym output section */
362 Os_desc *ofl_osldynsym; /* .SUNW_ldynsym output section */
363 Os_desc *ofl_osdynstr; /* .dynstr output section */
364 Os_desc *ofl_osdynsymsort; /* .SUNW_dynsymsort output section */
365 Os_desc *ofl_osdyntlssort; /* .SUNW_dyntlssort output section */
366 Os_desc *ofl_osgot; /* .got output section */
367 Os_desc *ofl_oshash; /* .hash output section */
368 Os_desc *ofl_osinitarray; /* .init_array output section */
369 Os_desc *ofl_osfiniarray; /* .fini_array output section */
370 Os_desc *ofl_ospreinitarray; /* .preinit_array output section */
371 Os_desc *ofl_osinterp; /* .interp output section */
372 Os_desc *ofl_oscap; /* .SUNW_cap output section */
373 Os_desc *ofl_oscapinfo; /* .SUNW_capinfo output section */
374 Os_desc *ofl_oscapchain; /* .SUNW_capchain output section */
375 Os_desc *ofl_osplt; /* .plt output section */
376 Os_desc *ofl_osmove; /* .SUNW_move output section */
377 Os_desc *ofl_osrelhead; /* first relocation section */
378 Os_desc *ofl_osrel; /* .rel[a] relocation section */
379 Os_desc *ofl_osshstrtab; /* .shstrtab output section */
380 Os_desc *ofl_osstrtab; /* .strtab output section */
381 Os_desc *ofl_ossymtab; /* .symtab output section */
382 Os_desc *ofl_ossymshndx; /* .symtab_shndx output section */
383 Os_desc *ofl_osdynshndx; /* .dynsym_shndx output section */
384 Os_desc *ofl_osldynshndx; /* .SUNW_ldynsym_shndx output sec */
385 Os_desc *ofl_osverdef; /* .version definition output section */
386 Os_desc *ofl_osverneed; /* .version needed output section */
387 Os_desc *ofl_osversym; /* .version symbol ndx output section */
388 Word ofl_dtflags_1; /* DT_FLAGS_1 entries */
389 Word ofl_dtflags; /* DT_FLAGS entries */
390 Os_desc *ofl_ossyminfo; /* .SUNW_syminfo output section */
391 Half ofl_parexpnndx; /* -z nopartial section index */
392 /* Ref. at perform_outreloc() in */
393 /* libld/{mach}/machrel.c */
394 Xword *ofl_checksum; /* DT_CHECKSUM value address */
395 char *ofl_depaudit; /* dependency auditing required (-P) */
396 char *ofl_audit; /* object auditing required (-p) */
397 Alist *ofl_symfltrs; /* per-symbol filtees and their */
398 Alist *ofl_dtsfltrs; /* associated .dynamic/.dynstrs */
399 Objcapset ofl_ocapset; /* object capabilities */
400 Lm_list *ofl_lml; /* runtime link-map list */
401 Gottable *ofl_gottable; /* debugging got information */
402 Rlxrel_cache ofl_sr_cache; /* Cache last result from */
403 /* sloppy_comdat_reloc() */
404 APlist *ofl_maptext; /* mapfile added text sections */
405 APlist *ofl_mapdata; /* mapfile added data sections */
406 avl_tree_t *ofl_wrap; /* -z wrap symbols */
407 ofl_guideflag_t ofl_guideflags; /* -z guide flags */
408 APlist *ofl_assdeflib; /* -z assert-deflib exceptions */
409 int ofl_aslr; /* -z aslr, -1 disable, 1 enable */
410 };
411
412 #define FLG_OF_DYNAMIC 0x00000001 /* generate dynamic output module */
413 #define FLG_OF_STATIC 0x00000002 /* generate static output module */
414 #define FLG_OF_EXEC 0x00000004 /* generate an executable */
415 #define FLG_OF_RELOBJ 0x00000008 /* generate a relocatable object */
416 #define FLG_OF_SHAROBJ 0x00000010 /* generate a shared object */
417 #define FLG_OF_BFLAG 0x00000020 /* do no special plt building: -b */
418 #define FLG_OF_IGNENV 0x00000040 /* ignore LD_LIBRARY_PATH: -i */
419 #define FLG_OF_STRIP 0x00000080 /* strip output: -s */
420 #define FLG_OF_NOWARN 0x00000100 /* disable symbol warnings: -t */
421 #define FLG_OF_NOUNDEF 0x00000200 /* allow no undefined symbols: -zdefs */
422 #define FLG_OF_PURETXT 0x00000400 /* allow no text relocations: -ztext */
423 #define FLG_OF_GENMAP 0x00000800 /* generate a memory map: -m */
424 #define FLG_OF_DYNLIBS 0x00001000 /* dynamic input allowed: -Bdynamic */
425 #define FLG_OF_SYMBOLIC 0x00002000 /* bind global symbols: -Bsymbolic */
426 #define FLG_OF_ADDVERS 0x00004000 /* add version stamp: -Qy */
427 #define FLG_OF_NOLDYNSYM 0x00008000 /* -znoldynsym set */
428 #define FLG_OF_IS_ORDER 0x00010000 /* input section ordering within a */
429 /* segment is required */
430 #define FLG_OF_EC_FILES 0x00020000 /* Ent_desc exist w/non-NULL ec_files */
431 #define FLG_OF_TEXTREL 0x00040000 /* text relocations have been found */
432 #define FLG_OF_MULDEFS 0x00080000 /* multiple symbols are allowed */
433 #define FLG_OF_TLSPHDR 0x00100000 /* a TLS program header is required */
434 #define FLG_OF_BLDGOT 0x00200000 /* build GOT table */
435 #define FLG_OF_VERDEF 0x00400000 /* record version definitions */
436 #define FLG_OF_VERNEED 0x00800000 /* record version dependencies */
437 #define FLG_OF_NOVERSEC 0x01000000 /* don't record version sections */
438 #define FLG_OF_KEY 0x02000000 /* file requires sort keys */
439 #define FLG_OF_PROCRED 0x04000000 /* process any symbol reductions by */
440 /* effecting the symbol table */
441 /* output and relocations */
442 #define FLG_OF_SYMINFO 0x08000000 /* create a syminfo section */
443 #define FLG_OF_AUX 0x10000000 /* ofl_filter is an auxiliary filter */
444 #define FLG_OF_FATAL 0x20000000 /* fatal error during input */
445 #define FLG_OF_WARN 0x40000000 /* warning during input processing. */
446 #define FLG_OF_VERBOSE 0x80000000 /* -z verbose flag set */
447
448 #define FLG_OF_MAPSYMB 0x000100000000 /* symbolic scope definition seen */
449 #define FLG_OF_MAPGLOB 0x000200000000 /* global scope definition seen */
450 #define FLG_OF_COMREL 0x000400000000 /* -z combreloc set, which enables */
451 /* DT_RELACNT tracking, */
452 #define FLG_OF_NOCOMREL 0x000800000000 /* -z nocombreloc set */
453 #define FLG_OF_AUTOLCL 0x001000000000 /* automatically reduce unspecified */
454 /* global symbols to locals */
455 #define FLG_OF_AUTOELM 0x002000000000 /* automatically eliminate */
456 /* unspecified global symbols */
457 #define FLG_OF_REDLSYM 0x004000000000 /* reduce local symbols */
458 #define FLG_OF_OS_ORDER 0x008000000000 /* output section ordering required */
459 #define FLG_OF_OSABI 0x010000000000 /* tag object as ELFOSABI_SOLARIS */
460 #define FLG_OF_ADJOSCNT 0x020000000000 /* adjust ofl_shdrcnt to accommodate */
461 /* discarded sections */
462 #define FLG_OF_OTOSCAP 0x040000000000 /* convert object capabilities to */
463 /* symbol capabilities */
464 #define FLG_OF_PTCAP 0x080000000000 /* PT_SUNWCAP required */
465 #define FLG_OF_CAPSTRS 0x100000000000 /* capability strings are required */
466 #define FLG_OF_EHFRAME 0x200000000000 /* output contains .eh_frame section */
467 #define FLG_OF_FATWARN 0x400000000000 /* make warnings fatal */
468 #define FLG_OF_ADEFLIB 0x800000000000 /* no libraries in default path */
469
470 #define FLG_OF_KMOD 0x1000000000000 /* output is a kernel module */
471
472 /*
473 * In the flags1 arena, establish any options that are applicable to archive
474 * extraction first, and associate a mask. These values are recorded with any
475 * archive descriptor so that they may be reset should the archive require a
476 * rescan to try and resolve undefined symbols.
477 */
478 #define FLG_OF1_ALLEXRT 0x0000000001 /* extract all members from an */
479 /* archive file */
480 #define FLG_OF1_WEAKEXT 0x0000000002 /* allow archive extraction to */
481 /* resolve weak references */
482 #define MSK_OF1_ARCHIVE 0x0000000003 /* archive flags mask */
483
484 #define FLG_OF1_NOINTRP 0x0000000008 /* -z nointerp flag set */
485 #define FLG_OF1_ZDIRECT 0x0000000010 /* -z direct flag set */
486 #define FLG_OF1_NDIRECT 0x0000000020 /* no-direct bindings specified */
487 #define FLG_OF1_DEFERRED 0x0000000040 /* deferred dependency recording */
488
489 #define FLG_OF1_RELDYN 0x0000000100 /* process .dynamic in rel obj */
490 #define FLG_OF1_NRLXREL 0x0000000200 /* -z norelaxreloc flag set */
491 #define FLG_OF1_RLXREL 0x0000000400 /* -z relaxreloc flag set */
492 #define FLG_OF1_IGNORE 0x0000000800 /* ignore unused dependencies */
493 #define FLG_OF1_NOSGHND 0x0000001000 /* -z nosighandler flag set */
494 #define FLG_OF1_TEXTOFF 0x0000002000 /* text relocations are ok */
495 #define FLG_OF1_ABSEXEC 0x0000004000 /* -zabsexec set */
496 #define FLG_OF1_LAZYLD 0x0000008000 /* lazy loading of objects enabled */
497 #define FLG_OF1_GRPPRM 0x0000010000 /* dependencies are to have */
498 /* GROUPPERM enabled */
499
500 #define FLG_OF1_NOPARTI 0x0000040000 /* -znopartial set */
501 #define FLG_OF1_BSSOREL 0x0000080000 /* output relocation against bss */
502 /* section */
503 #define FLG_OF1_TLSOREL 0x0000100000 /* output relocation against .tlsbss */
504 /* section */
505 #define FLG_OF1_MEMORY 0x0000200000 /* produce a memory model */
506 #define FLG_OF1_NGLBDIR 0x0000400000 /* no DT_1_DIRECT flag allowed */
507 #define FLG_OF1_ENCDIFF 0x0000800000 /* host running linker has different */
508 /* byte order than output object */
509 #define FLG_OF1_VADDR 0x0001000000 /* a segment defines explicit vaddr */
510 #define FLG_OF1_EXTRACT 0x0002000000 /* archive member has been extracted */
511 #define FLG_OF1_RESCAN 0x0004000000 /* any archives should be rescanned */
512 #define FLG_OF1_IGNPRC 0x0008000000 /* ignore processing required */
513 #define FLG_OF1_NCSTTAB 0x0010000000 /* -znocompstrtab set */
514 #define FLG_OF1_DONE 0x0020000000 /* link-editor processing complete */
515 #define FLG_OF1_NONREG 0x0040000000 /* non-regular file specified as */
516 /* the output file */
517 #define FLG_OF1_ALNODIR 0x0080000000 /* establish NODIRECT for all */
518 /* exported interfaces. */
519 #define FLG_OF1_OVHWCAP1 0x0100000000 /* override CA_SUNW_HW_1 capabilities */
520 #define FLG_OF1_OVSFCAP1 0x0200000000 /* override CA_SUNW_SF_1 capabilities */
521 #define FLG_OF1_OVHWCAP2 0x0400000000 /* override CA_SUNW_HW_2 capabilities */
522 #define FLG_OF1_OVMACHCAP 0x0800000000 /* override CA_SUNW_MACH capability */
523 #define FLG_OF1_OVPLATCAP 0x1000000000 /* override CA_SUNW_PLAT capability */
524 #define FLG_OF1_OVIDCAP 0x2000000000 /* override CA_SUNW_ID capability */
525
526 /*
527 * Guidance flags. The flags with the FLG_OFG_NO_ prefix are used to suppress
528 * messages for a given category, and use the lower 28 bits of the word,
529 * The upper nibble is reserved for other guidance status.
530 */
531 #define FLG_OFG_ENABLE 0x10000000 /* -z guidance option active */
532 #define FLG_OFG_ISSUED 0x20000000 /* -z guidance message issued */
533
534 #define FLG_OFG_NO_ALL 0x0fffffff /* disable all guidance */
535 #define FLG_OFG_NO_DEFS 0x00000001 /* specify all dependencies */
536 #define FLG_OFG_NO_DB 0x00000002 /* use direct bindings */
537 #define FLG_OFG_NO_LAZY 0x00000004 /* be explicit about lazyload */
538 #define FLG_OFG_NO_MF 0x00000008 /* use v2 mapfile syntax */
539 #define FLG_OFG_NO_TEXT 0x00000010 /* verify pure text segment */
540 #define FLG_OFG_NO_UNUSED 0x00000020 /* remove unused dependency */
541 #define FLG_OFG_NO_KMOD 0x00000040 /* use -z type=kmod */
542
543 /*
544 * Test to see if a guidance should be given for a given category
545 * or not. _no_flag is one of the FLG_OFG_NO_xxx flags. Returns TRUE
546 * if the guidance should be issued, and FALSE to remain silent.
547 */
548 #define OFL_GUIDANCE(_ofl, _no_flag) (((_ofl)->ofl_guideflags & \
549 (FLG_OFG_ENABLE | (_no_flag))) == FLG_OFG_ENABLE)
550
551 /*
552 * Test to see if the output file would allow the presence of
553 * a .dynsym section.
554 */
555 #define OFL_ALLOW_DYNSYM(_ofl) (((_ofl)->ofl_flags & \
556 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == FLG_OF_DYNAMIC)
557
558 /*
559 * Test to see if the output file would allow the presence of
560 * a .SUNW_ldynsym section. The requirements are that a .dynsym
561 * is allowed, and -znoldynsym has not been specified. Note that
562 * even if the answer is True (1), we will only generate one if there
563 * are local symbols that require it.
564 */
565 #define OFL_ALLOW_LDYNSYM(_ofl) (((_ofl)->ofl_flags & \
566 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ | FLG_OF_NOLDYNSYM)) == FLG_OF_DYNAMIC)
567
568 /*
569 * Test to see if relocation processing should be done. This is normally
570 * true, but can be disabled via the '-z noreloc' option. Note that
571 * relocatable objects are still relocated even if '-z noreloc' is present.
572 */
573 #define OFL_DO_RELOC(_ofl) (((_ofl)->ofl_flags & FLG_OF_RELOBJ) || \
574 !((_ofl)->ofl_dtflags_1 & DF_1_NORELOC))
575
576 /*
577 * Determine whether a static executable is being built.
578 */
579 #define OFL_IS_STATIC_EXEC(_ofl) (((_ofl)->ofl_flags & \
580 (FLG_OF_STATIC | FLG_OF_EXEC)) == (FLG_OF_STATIC | FLG_OF_EXEC))
581
582 /*
583 * Determine whether a static object is being built. This macro is used
584 * to select the appropriate string table, and symbol table that other
585 * sections need to reference.
586 */
587 #define OFL_IS_STATIC_OBJ(_ofl) ((_ofl)->ofl_flags & \
588 (FLG_OF_RELOBJ | FLG_OF_STATIC))
589
590 /*
591 * Macros for counting symbol table entries. These are used to size symbol
592 * tables and associated sections (.syminfo, SUNW_capinfo, .hash, etc.) and
593 * set required sh_info entries (the offset to the first global symbol).
594 */
595 #define SYMTAB_LOC_CNT(_ofl) /* local .symtab entries */ \
596 (2 + /* NULL and STT_FILE */ \
597 (_ofl)->ofl_shdrcnt + /* section symbol */ \
598 (_ofl)->ofl_caploclcnt + /* local capabilities */ \
599 (_ofl)->ofl_scopecnt + /* scoped symbols */ \
600 (_ofl)->ofl_locscnt) /* standard locals */
601 #define SYMTAB_ALL_CNT(_ofl) /* all .symtab entries */ \
602 (SYMTAB_LOC_CNT(_ofl) + /* .symtab locals */ \
603 (_ofl)->ofl_globcnt) /* standard globals */
604
605 #define DYNSYM_LOC_CNT(_ofl) /* local .dynsym entries */ \
606 (1 + /* NULL */ \
607 (_ofl)->ofl_dynshdrcnt + /* section symbols */ \
608 (_ofl)->ofl_caploclcnt + /* local capabilities */ \
609 (_ofl)->ofl_lregsymcnt) /* local register symbols */
610 #define DYNSYM_ALL_CNT(_ofl) /* all .dynsym entries */ \
611 (DYNSYM_LOC_CNT(_ofl) + /* .dynsym locals */ \
612 (_ofl)->ofl_globcnt) /* standard globals */
613
614 /*
615 * Define a move descriptor used within relocation structures.
616 */
617 typedef struct {
618 Move *mr_move;
619 Sym_desc *mr_sym;
620 } Mv_reloc;
621
622 /*
623 * Relocation (active & output) processing structure - transparent to common
624 * code. There can be millions of these structures in a large link, so it
625 * is important to keep it small. You should only add new items to Rel_desc
626 * if they are critical, apply to most relocations, and cannot be easily
627 * computed from the other information.
628 *
629 * Items that can be derived should be implemented as a function that accepts
630 * a Rel_desc argument, and returns the desired data. ld_reloc_sym_name() is
631 * an example of this.
632 *
633 * Lesser used relocation data is kept in an auxiliary block, Rel_aux,
634 * that is only allocated as necessary. In exchange for adding one pointer
635 * of overhead to Rel_desc (rel_aux), most relocations are reduced in size
636 * by the size of Rel_aux. This strategy relies on the data in Rel_aux
637 * being rarely needed --- otherwise it will backfire badly.
638 *
639 * Note that rel_raddend is primarily only of interest to RELA relocations,
640 * and is set to 0 for REL. However, there is an exception: If FLG_REL_NADDEND
641 * is set, then rel_raddend contains a replacement value for the implicit
642 * addend found in the relocation target.
643 *
644 * Fields should be ordered from largest to smallest, to minimize packing
645 * holes in the struct layout.
646 */
647 struct rel_desc {
648 Is_desc *rel_isdesc; /* input section reloc is against */
649 Sym_desc *rel_sym; /* sym relocation is against */
650 Rel_aux *rel_aux; /* NULL, or auxiliary data */
651 Xword rel_roffset; /* relocation offset */
652 Sxword rel_raddend; /* addend from input relocation */
653 Word rel_flags; /* misc. flags for relocations */
654 Word rel_rtype; /* relocation type */
655 };
656
657 /*
658 * Data that would be kept in Rel_desc if the size of that structure was
659 * not an issue. This auxiliary block is only allocated as needed,
660 * and must only contain rarely needed items. The goal is for the vast
661 * majority of Rel_desc structs to not have an auxiliary block.
662 *
663 * When a Rel_desc does not have an auxiliary block, a default value
664 * is assumed for each auxiliary item:
665 *
666 * - ra_osdesc:
667 * Output section to which relocation applies. The default
668 * value for this is the output section associated with the
669 * input section (rel_isdesc->is_osdesc), or NULL if there
670 * is no associated input section.
671 *
672 * - ra_usym:
673 * If the symbol associated with a relocation is part of a weak/strong
674 * pair, then ra_usym contains the strong symbol and rel_sym the weak.
675 * Otherwise, the default value is the same value as rel_sym.
676 *
677 * - ra_move:
678 * Move table data. The default value is NULL.
679 *
680 * - ra_typedata:
681 * ELF_R_TYPE_DATA(info). This value applies only to a small
682 * subset of 64-bit sparc relocations, and is otherwise 0. The
683 * default value is 0.
684 *
685 * If any value in Rel_aux is non-default, then an auxiliary block is
686 * necessary, and each field contains its actual value. If all the auxiliary
687 * values are default, no Rel_aux is needed, and the RELAUX_GET_xxx()
688 * macros below are able to supply the proper default.
689 *
690 * To set a Rel_aux value, use the ld_reloc_set_aux_XXX() functions.
691 * These functions are written to avoid unnecessary auxiliary allocations,
692 * and know the rules for each item.
693 */
694 struct rel_aux {
695 Os_desc *ra_osdesc; /* output section reloc is against */
696 Sym_desc *ra_usym; /* strong sym if this is a weak pair */
697 Mv_reloc *ra_move; /* move table information */
698 Word ra_typedata; /* ELF_R_TYPE_DATA(info) */
699 };
700
701 /*
702 * Test a given auxiliary value to determine if it has the default value
703 * for that item, as described above. If all the auxiliary items have
704 * their default values, no auxiliary place is necessary to represent them.
705 * If any one of them is non-default, the auxiliary block is needed.
706 */
707 #define RELAUX_ISDEFAULT_MOVE(_rdesc, _mv) (_mv == NULL)
708 #define RELAUX_ISDEFAULT_USYM(_rdesc, _usym) ((_rdesc)->rel_sym == _usym)
709 #define RELAUX_ISDEFAULT_OSDESC(_rdesc, _osdesc) \
710 ((((_rdesc)->rel_isdesc == NULL) && (_osdesc == NULL)) || \
711 ((_rdesc)->rel_isdesc && ((_rdesc)->rel_isdesc->is_osdesc == _osdesc)))
712 #define RELAUX_ISDEFAULT_TYPEDATA(_rdesc, _typedata) (_typedata == 0)
713
714 /*
715 * Retrieve the value of an auxiliary relocation item, preserving the illusion
716 * that every relocation descriptor has an auxiliary block attached. The
717 * real implementation is that an auxiliary block is only present if one or
718 * more auxiliary items have non-default values. These macros return the true
719 * value if an auxiliary block is present, and the default value for the
720 * item otherwise.
721 */
722 #define RELAUX_GET_MOVE(_rdesc) \
723 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_move : NULL)
724 #define RELAUX_GET_USYM(_rdesc) \
725 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_usym : (_rdesc)->rel_sym)
726 #define RELAUX_GET_OSDESC(_rdesc) \
727 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_osdesc : \
728 ((_rdesc)->rel_isdesc ? (_rdesc)->rel_isdesc->is_osdesc : NULL))
729 #define RELAUX_GET_TYPEDATA(_rdesc) \
730 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_typedata : 0)
731
732 /*
733 * common flags used on the Rel_desc structure (defined in machrel.h).
734 */
735 #define FLG_REL_GOT 0x00000001 /* relocation against GOT */
736 #define FLG_REL_PLT 0x00000002 /* relocation against PLT */
737 #define FLG_REL_BSS 0x00000004 /* relocation against BSS */
738 #define FLG_REL_LOAD 0x00000008 /* section loadable */
739 #define FLG_REL_SCNNDX 0x00000010 /* use section index for symbol ndx */
740 #define FLG_REL_CLVAL 0x00000020 /* clear VALUE for active relocation */
741 #define FLG_REL_ADVAL 0x00000040 /* add VALUE for output relocation, */
742 /* only relevant to SPARC and */
743 /* R_SPARC_RELATIVE */
744 #define FLG_REL_GOTCL 0x00000080 /* clear the GOT entry. This is */
745 /* relevant to RELA relocations, */
746 /* not REL (i386) relocations */
747 #define FLG_REL_MOVETAB 0x00000100 /* Relocation against .SUNW_move */
748 /* adjustments required before */
749 /* actual relocation */
750 #define FLG_REL_NOINFO 0x00000200 /* Relocation comes from a section */
751 /* with a null sh_info field */
752 #define FLG_REL_REG 0x00000400 /* Relocation target is reg sym */
753 #define FLG_REL_FPTR 0x00000800 /* relocation against func. desc. */
754 #define FLG_REL_RFPTR1 0x00001000 /* Relative relocation against */
755 /* 1st part of FD */
756 #define FLG_REL_RFPTR2 0x00002000 /* Relative relocation against */
757 /* 2nd part of FD */
758 #define FLG_REL_DISP 0x00004000 /* *disp* relocation */
759 #define FLG_REL_STLS 0x00008000 /* IE TLS reference to */
760 /* static TLS GOT index */
761 #define FLG_REL_DTLS 0x00010000 /* GD TLS reference relative to */
762 /* dynamic TLS GOT index */
763 #define FLG_REL_MTLS 0x00020000 /* LD TLS reference against GOT */
764 #define FLG_REL_STTLS 0x00040000 /* LE TLS reference directly */
765 /* to static tls index */
766 #define FLG_REL_TLSFIX 0x00080000 /* relocation points to TLS instr. */
767 /* which needs updating */
768 #define FLG_REL_RELA 0x00100000 /* descriptor captures a Rela */
769 #define FLG_REL_GOTFIX 0x00200000 /* relocation points to GOTOP instr. */
770 /* which needs updating */
771 #define FLG_REL_NADDEND 0x00400000 /* Replace implicit addend in dest */
772 /* with value in rel_raddend */
773 /* Relevant to REL (i386) */
774 /* relocations, not to RELA. */
775
776 /*
777 * We often need the name of the symbol contained in a relocation descriptor
778 * for diagnostic or error output. This is usually the symbol name, but
779 * we substitute a constructed name in some cases. Hence, the name is
780 * generated on the fly by a private function within libld. This is the
781 * prototype for that function.
782 */
783 typedef const char *(* rel_desc_sname_func_t)(Rel_desc *);
784
785 /*
786 * Header for a relocation descriptor cache buffer.
787 */
788 struct rel_cachebuf {
789 Rel_desc *rc_end;
790 Rel_desc *rc_free;
791 Rel_desc rc_arr[1];
792 };
793
794 /*
795 * Header for a relocation auxiliary descriptor cache buffer.
796 */
797 struct rel_aux_cachebuf {
798 Rel_aux *rac_end;
799 Rel_aux *rac_free;
800 Rel_aux rac_arr[1];
801 };
802
803 /*
804 * Convenience macro for traversing every relocation descriptor found within
805 * a given relocation cache, transparently handling the cache buffers and
806 * skipping any unallocated descriptors within the buffers.
807 *
808 * entry:
809 * _rel_cache - Relocate descriptor cache (Rel_cache) to traverse
810 * _idx - Aliste index variable for use by the macro
811 * _rcbp - Cache buffer pointer, for use by the macro
812 * _orsp - Rel_desc pointer, which will take on the value of a different
813 * relocation descriptor in the cache in each iteration.
814 *
815 * The caller must not assign new values to _idx, _rcbp, or _orsp within
816 * the scope of REL_CACHE_TRAVERSE.
817 */
818 #define REL_CACHE_TRAVERSE(_rel_cache, _idx, _rcbp, _orsp) \
819 for (APLIST_TRAVERSE((_rel_cache)->rc_list, _idx, _rcbp)) \
820 for (_orsp = _rcbp->rc_arr; _orsp < _rcbp->rc_free; _orsp++)
821
822 /*
823 * Symbol value descriptor. For relocatable objects, each symbols value is
824 * its offset within its associated section. Therefore, to uniquely define
825 * each symbol within a relocatable object, record and sort the sh_offset and
826 * symbol value. This information is used to search for displacement
827 * relocations as part of copy relocation validation.
828 */
829 typedef struct {
830 Addr ssv_value;
831 Sym_desc *ssv_sdp;
832 } Ssv_desc;
833
834 /*
835 * Input file processing structures.
836 */
837 struct ifl_desc { /* input file descriptor */
838 const char *ifl_name; /* full file name */
839 const char *ifl_soname; /* shared object name */
840 dev_t ifl_stdev; /* device id and inode number for .so */
841 ino_t ifl_stino; /* multiple inclusion checks */
842 Ehdr *ifl_ehdr; /* elf header describing this file */
843 Elf *ifl_elf; /* elf descriptor for this file */
844 Sym_desc **ifl_oldndx; /* original symbol table indices */
845 Sym_desc *ifl_locs; /* symbol desc version of locals */
846 Ssv_desc *ifl_sortsyms; /* sorted list of symbols by value */
847 Word ifl_locscnt; /* no. of local symbols to process */
848 Word ifl_symscnt; /* total no. of symbols to process */
849 Word ifl_sortcnt; /* no. of sorted symbols to process */
850 Word ifl_shnum; /* number of sections in file */
851 Word ifl_shstrndx; /* index to .shstrtab */
852 Word ifl_vercnt; /* number of versions in file */
853 Half ifl_neededndx; /* index to NEEDED in .dyn section */
854 Word ifl_flags; /* explicit/implicit reference */
855 Is_desc **ifl_isdesc; /* isdesc[scn ndx] = Is_desc ptr */
856 Sdf_desc *ifl_sdfdesc; /* control definition */
857 Versym *ifl_versym; /* version symbol table array */
858 Ver_index *ifl_verndx; /* verndx[ver ndx] = Ver_index */
859 APlist *ifl_verdesc; /* version descriptor list */
860 APlist *ifl_relsect; /* relocation section list */
861 Alist *ifl_groups; /* SHT_GROUP section list */
862 Cap_desc *ifl_caps; /* capabilities descriptor */
863 };
864
865 #define FLG_IF_CMDLINE 0x00000001 /* full filename specified from the */
866 /* command line (no -l) */
867 #define FLG_IF_NEEDED 0x00000002 /* shared object should be recorded */
868 #define FLG_IF_DIRECT 0x00000004 /* establish direct bindings to this */
869 /* object */
870 #define FLG_IF_EXTRACT 0x00000008 /* file extracted from an archive */
871 #define FLG_IF_VERNEED 0x00000010 /* version dependency information is */
872 /* required */
873 #define FLG_IF_DEPREQD 0x00000020 /* dependency is required to satisfy */
874 /* symbol references */
875 #define FLG_IF_NEEDSTR 0x00000040 /* dependency specified by -Nn */
876 /* flag */
877 #define FLG_IF_IGNORE 0x00000080 /* ignore unused dependencies */
878 #define FLG_IF_NODIRECT 0x00000100 /* object contains symbols that */
879 /* cannot be directly bound to */
880 #define FLG_IF_LAZYLD 0x00000200 /* dependency should be lazy loaded */
881 #define FLG_IF_GRPPRM 0x00000400 /* dependency establishes a group */
882 #define FLG_IF_DISPPEND 0x00000800 /* displacement relocation done */
883 /* in the ld time. */
884 #define FLG_IF_DISPDONE 0x00001000 /* displacement relocation done */
885 /* at the run time */
886 #define FLG_IF_MAPFILE 0x00002000 /* file is a mapfile */
887 #define FLG_IF_HSTRTAB 0x00004000 /* file has a string section */
888 #define FLG_IF_FILEREF 0x00008000 /* file contains a section which */
889 /* is included in the output */
890 /* allocatable image */
891 #define FLG_IF_GNUVER 0x00010000 /* file used GNU-style versioning */
892 #define FLG_IF_ORDERED 0x00020000 /* ordered section processing */
893 /* required */
894 #define FLG_IF_OTOSCAP 0x00040000 /* convert object capabilities to */
895 /* symbol capabilities */
896 #define FLG_IF_DEFERRED 0x00080000 /* dependency is deferred */
897 #define FLG_IF_RTLDINF 0x00100000 /* dependency has DT_SUNW_RTLTINF set */
898 #define FLG_IF_GROUPS 0x00200000 /* input file has groups to process */
899
900 /*
901 * Symbol states that require the generation of a DT_POSFLAG_1 .dynamic entry.
902 */
903 #define MSK_IF_POSFLAG1 (FLG_IF_LAZYLD | FLG_IF_GRPPRM | FLG_IF_DEFERRED)
904
905 /*
906 * Symbol states that require an associated Syminfo entry.
907 */
908 #define MSK_IF_SYMINFO (FLG_IF_LAZYLD | FLG_IF_DIRECT | FLG_IF_DEFERRED)
909
910
911 struct is_desc { /* input section descriptor */
912 const char *is_name; /* original section name */
913 const char *is_sym_name; /* NULL, or name string to use for */
914 /* related STT_SECTION symbols */
915 Shdr *is_shdr; /* the elf section header */
916 Ifl_desc *is_file; /* infile desc for this section */
917 Os_desc *is_osdesc; /* new output section for this */
918 /* input section */
919 Elf_Data *is_indata; /* input sections raw data */
920 Is_desc *is_symshndx; /* related SHT_SYM_SHNDX section */
921 Is_desc *is_comdatkeep; /* If COMDAT section is discarded, */
922 /* this is section that was kept */
923 Word is_scnndx; /* original section index in file */
924 Word is_ordndx; /* index for section. Used to decide */
925 /* where to insert section when */
926 /* reordering sections */
927 Word is_keyident; /* key for SHF_{ORDERED|LINK_ORDER} */
928 /* processing and ident used for */
929 /* placing/ordering sections */
930 Word is_flags; /* Various flags */
931 };
932
933 #define FLG_IS_ORDERED 0x0001 /* this is a SHF_ORDERED section */
934 #define FLG_IS_KEY 0x0002 /* section requires sort keys */
935 #define FLG_IS_DISCARD 0x0004 /* section is to be discarded */
936 #define FLG_IS_RELUPD 0x0008 /* symbol defined here may have moved */
937 #define FLG_IS_SECTREF 0x0010 /* section has been referenced */
938 #define FLG_IS_GDATADEF 0x0020 /* section contains global data sym */
939 #define FLG_IS_EXTERNAL 0x0040 /* isp from a user file */
940 #define FLG_IS_INSTRMRG 0x0080 /* Usable SHF_MERGE|SHF_STRINGS sec */
941 #define FLG_IS_GNSTRMRG 0x0100 /* Generated mergeable string section */
942
943 #define FLG_IS_PLACE 0x0400 /* section requires to be placed */
944 #define FLG_IS_COMDAT 0x0800 /* section is COMDAT */
945 #define FLG_IS_EHFRAME 0x1000 /* section is .eh_frame */
946
947 /*
948 * Output sections contain lists of input sections that are assigned to them.
949 * These items fall into 4 categories:
950 * BEFORE - Ordered sections that specify SHN_BEFORE, in input order.
951 * ORDERED - Ordered sections that are sorted using unsorted sections
952 * as the sort key.
953 * DEFAULT - Sections that are placed into the output section
954 * in input order.
955 * AFTER - Ordered sections that specify SHN_AFTER, in input order.
956 */
957 #define OS_ISD_BEFORE 0
958 #define OS_ISD_ORDERED 1
959 #define OS_ISD_DEFAULT 2
960 #define OS_ISD_AFTER 3
961 #define OS_ISD_NUM 4
962 typedef APlist *os_isdecs_arr[OS_ISD_NUM];
963
964 /*
965 * Convenience macro for traversing every input section associated
966 * with a given output section. The primary benefit of this macro
967 * is that it preserves a precious level of code indentation in the
968 * code that uses it.
969 */
970 #define OS_ISDESCS_TRAVERSE(_list_idx, _osp, _idx, _isp) \
971 for (_list_idx = 0; _list_idx < OS_ISD_NUM; _list_idx++) \
972 for (APLIST_TRAVERSE(_osp->os_isdescs[_list_idx], _idx, _isp))
973
974
975 /*
976 * Map file and output file processing structures
977 */
978 struct os_desc { /* Output section descriptor */
979 const char *os_name; /* the section name */
980 Elf_Scn *os_scn; /* the elf section descriptor */
981 Shdr *os_shdr; /* the elf section header */
982 Os_desc *os_relosdesc; /* the output relocation section */
983 APlist *os_relisdescs; /* reloc input section descriptors */
984 /* for this output section */
985 os_isdecs_arr os_isdescs; /* lists of input sections in output */
986 APlist *os_mstrisdescs; /* FLG_IS_INSTRMRG input sections */
987 Sg_desc *os_sgdesc; /* segment os_desc is placed on */
988 Elf_Data *os_outdata; /* output sections raw data */
989 avl_tree_t *os_comdats; /* AVL tree of COMDAT input sections */
990 /* associated to output section */
991 Word os_identndx; /* section identifier for input */
992 /* section processing, followed */
993 /* by section symbol index */
994 Word os_ordndx; /* index for section. Used to decide */
995 /* where to insert section when */
996 /* reordering sections */
997 Xword os_szoutrels; /* size of output relocation section */
998 uint_t os_namehash; /* hash on section name */
999 uchar_t os_flags; /* various flags */
1000 };
1001
1002 #define FLG_OS_KEY 0x01 /* section requires sort keys */
1003 #define FLG_OS_OUTREL 0x02 /* output rel against this section */
1004 #define FLG_OS_SECTREF 0x04 /* isps are not affected by -zignore */
1005 #define FLG_OS_EHFRAME 0x08 /* section is .eh_frame */
1006
1007 /*
1008 * The sg_id field of the segment descriptor is used to establish the default
1009 * order for program headers and segments in the output object. Segments are
1010 * ordered according to the following SGID values that classify them based on
1011 * their attributes. The initial set of built in segments are in this order,
1012 * and new mapfile defined segments are inserted into these groups. Within a
1013 * given SGID group, the position of new segments depends on the syntax
1014 * version of the mapfile that creates them. Version 1 (original sysv)
1015 * mapfiles place the new segment at the head of their group (reverse creation
1016 * order). The newer syntax places them at the end, following the others
1017 * (creation order).
1018 *
1019 * Note that any new segments must always be added after PT_PHDR and
1020 * PT_INTERP (refer Generic ABI, Page 5-4).
1021 */
1022 #define SGID_PHDR 0 /* PT_PHDR */
1023 #define SGID_INTERP 1 /* PT_INTERP */
1024 #define SGID_SUNWCAP 2 /* PT_SUNWCAP */
1025 #define SGID_TEXT 3 /* PT_LOAD */
1026 #define SGID_DATA 4 /* PT_LOAD */
1027 #define SGID_BSS 5 /* PT_LOAD */
1028 #if defined(_ELF64)
1029 #define SGID_LRODATA 6 /* PT_LOAD (amd64-only) */
1030 #define SGID_LDATA 7 /* PT_LOAD (amd64-only) */
1031 #endif
1032 #define SGID_TEXT_EMPTY 8 /* PT_LOAD, reserved (?E in version 1 syntax) */
1033 #define SGID_NULL_EMPTY 9 /* PT_NULL, reserved (?E in version 1 syntax) */
1034 #define SGID_DYN 10 /* PT_DYNAMIC */
1035 #define SGID_DTRACE 11 /* PT_SUNWDTRACE */
1036 #define SGID_TLS 12 /* PT_TLS */
1037 #define SGID_UNWIND 13 /* PT_SUNW_UNWIND */
1038 #define SGID_SUNWSTACK 14 /* PT_SUNWSTACK */
1039 #define SGID_NOTE 15 /* PT_NOTE */
1040 #define SGID_NULL 16 /* PT_NULL, mapfile defined empty phdr slots */
1041 /* for use by post processors */
1042 #define SGID_EXTRA 17 /* PT_NULL (final catchall) */
1043
1044 typedef Half sg_flags_t;
1045 struct sg_desc { /* output segment descriptor */
1046 Word sg_id; /* segment identifier (for sorting) */
1047 Phdr sg_phdr; /* segment header for output file */
1048 const char *sg_name; /* segment name for PT_LOAD, PT_NOTE, */
1049 /* and PT_NULL, otherwise NULL */
1050 Xword sg_round; /* data rounding required (mapfile) */
1051 Xword sg_length; /* maximum segment length; if 0 */
1052 /* segment is not specified */
1053 APlist *sg_osdescs; /* list of output section descriptors */
1054 APlist *sg_is_order; /* list of entry criteria */
1055 /* giving input section order */
1056 Alist *sg_os_order; /* list specifying output section */
1057 /* ordering for the segment */
1058 sg_flags_t sg_flags;
1059 APlist *sg_sizesym; /* size symbols for this segment */
1060 Xword sg_align; /* LCM of sh_addralign */
1061 Elf_Scn *sg_fscn; /* the SCN of the first section. */
1062 avl_node_t sg_avlnode; /* AVL book-keeping */
1063 };
1064
1065 #define FLG_SG_P_VADDR 0x0001 /* p_vaddr segment attribute set */
1066 #define FLG_SG_P_PADDR 0x0002 /* p_paddr segment attribute set */
1067 #define FLG_SG_LENGTH 0x0004 /* length segment attribute set */
1068 #define FLG_SG_P_ALIGN 0x0008 /* p_align segment attribute set */
1069 #define FLG_SG_ROUND 0x0010 /* round segment attribute set */
1070 #define FLG_SG_P_FLAGS 0x0020 /* p_flags segment attribute set */
1071 #define FLG_SG_P_TYPE 0x0040 /* p_type segment attribute set */
1072 #define FLG_SG_IS_ORDER 0x0080 /* input section ordering is required */
1073 /* for this segment. */
1074 #define FLG_SG_NOHDR 0x0100 /* don't map ELF or phdrs into */
1075 /* this segment */
1076 #define FLG_SG_EMPTY 0x0200 /* an empty segment specification */
1077 /* no input sections will be */
1078 /* associated to this section */
1079 #define FLG_SG_KEY 0x0400 /* segment requires sort keys */
1080 #define FLG_SG_NODISABLE 0x0800 /* FLG_SG_DISABLED is not allowed on */
1081 /* this segment */
1082 #define FLG_SG_DISABLED 0x1000 /* this segment is disabled */
1083 #define FLG_SG_PHREQ 0x2000 /* this segment requires a program */
1084 /* header */
1085 #define FLG_SG_ORDERED 0x4000 /* SEGMENT_ORDER segment */
1086
1087 struct sec_order {
1088 const char *sco_secname; /* section name to be ordered */
1089 Half sco_flags;
1090 };
1091
1092 #define FLG_SGO_USED 0x0001 /* was ordering used? */
1093
1094 typedef Half ec_flags_t;
1095 struct ent_desc { /* input section entrance criteria */
1096 const char *ec_name; /* entrace criteria name, or NULL */
1097 Alist *ec_files; /* files from which to accept */
1098 /* sections */
1099 const char *ec_is_name; /* input section name to match */
1100 /* (NULL if none) */
1101 Word ec_type; /* section type */
1102 Word ec_attrmask; /* section attribute mask (AWX) */
1103 Word ec_attrbits; /* sections attribute bits */
1104 Sg_desc *ec_segment; /* output segment to enter if matched */
1105 Word ec_ordndx; /* index to determine where section */
1106 /* meeting this criteria should */
1107 /* inserted. Used for reordering */
1108 /* of sections. */
1109 ec_flags_t ec_flags;
1110 avl_node_t ec_avlnode; /* AVL book-keeping */
1111 };
1112
1113 #define FLG_EC_BUILTIN 0x0001 /* built in descriptor */
1114 #define FLG_EC_USED 0x0002 /* entrance criteria met? */
1115 #define FLG_EC_CATCHALL 0x0004 /* Catches any section */
1116
1117 /*
1118 * Ent_desc_file is the type of element maintained in the ec_files Alist
1119 * of an entrance criteria descriptor. Each item maintains one file
1120 * path, and a set of flags that specify the type of comparison it implies,
1121 * and other information about it. The comparison type is maintained in
1122 * the bottom byte of the flags.
1123 */
1124 #define TYP_ECF_MASK 0x00ff /* Comparison type mask */
1125 #define TYP_ECF_PATH 0 /* Compare to file path */
1126 #define TYP_ECF_BASENAME 1 /* Compare to file basename */
1127 #define TYP_ECF_OBJNAME 2 /* Compare to regular file basename, */
1128 /* or to archive member name */
1129 #define TYP_ECF_NUM 3
1130
1131 #define FLG_ECF_ARMEMBER 0x0100 /* name includes archive member */
1132
1133 typedef struct {
1134 Word edf_flags; /* Type of comparison */
1135 const char *edf_name; /* String to compare to */
1136 size_t edf_name_len; /* strlen(edf_name) */
1137 } Ent_desc_file;
1138
1139 /*
1140 * One structure is allocated for a move entry, and associated to the symbol
1141 * against which a move is targeted.
1142 */
1143 typedef struct {
1144 Move *md_move; /* original Move entry */
1145 Xword md_start; /* start position */
1146 Xword md_len; /* length of initialization */
1147 Word md_oidx; /* output Move entry index */
1148 } Mv_desc;
1149
1150 /*
1151 * Symbol descriptor.
1152 */
1153 typedef Lword sd_flag_t;
1154 struct sym_desc {
1155 Alist *sd_GOTndxs; /* list of associated GOT entries */
1156 Sym *sd_sym; /* pointer to symbol table entry */
1157 Sym *sd_osym; /* copy of the original symbol entry */
1158 /* used only for local partial */
1159 Alist *sd_move; /* move information associated with a */
1160 /* partially initialized symbol */
1161 const char *sd_name; /* symbols name */
1162 Ifl_desc *sd_file; /* file where symbol is taken */
1163 Is_desc *sd_isc; /* input section of symbol definition */
1164 Sym_aux *sd_aux; /* auxiliary global symbol info. */
1165 Word sd_symndx; /* index in output symbol table */
1166 Word sd_shndx; /* sect. index sym is associated w/ */
1167 sd_flag_t sd_flags; /* state flags */
1168 Half sd_ref; /* reference definition of symbol */
1169 };
1170
1171 /*
1172 * The auxiliary symbol descriptor contains the additional information (beyond
1173 * the symbol descriptor) required to process global symbols. These symbols are
1174 * accessed via an internal symbol hash table where locality of reference is
1175 * important for performance.
1176 */
1177 struct sym_aux {
1178 APlist *sa_dfiles; /* files where symbol is defined */
1179 Sym sa_sym; /* copy of symtab entry */
1180 const char *sa_vfile; /* first unavailable definition */
1181 const char *sa_rfile; /* file with first symbol referenced */
1182 Word sa_hash; /* the pure hash value of symbol */
1183 Word sa_PLTndx; /* index into PLT for symbol */
1184 Word sa_PLTGOTndx; /* GOT entry indx for PLT indirection */
1185 Word sa_linkndx; /* index of associated symbol from */
1186 /* ET_DYN file */
1187 Half sa_symspec; /* special symbol ids */
1188 Half sa_overndx; /* output file versioning index */
1189 Half sa_dverndx; /* dependency versioning index */
1190 Os_desc *sa_boundsec; /* output section of SECBOUND_ syms */
1191 };
1192
1193 /*
1194 * Nodes used to track symbols in the global AVL symbol dictionary.
1195 */
1196 struct sym_avlnode {
1197 avl_node_t sav_node; /* AVL node */
1198 Word sav_hash; /* symbol hash value */
1199 const char *sav_name; /* symbol name */
1200 Sym_desc *sav_sdp; /* symbol descriptor */
1201 };
1202
1203 /*
1204 * These are the ids for processing of `Special symbols'. They are used
1205 * to set the sym->sd_aux->sa_symspec field.
1206 */
1207 #define SDAUX_ID_ETEXT 1 /* etext && _etext symbol */
1208 #define SDAUX_ID_EDATA 2 /* edata && _edata symbol */
1209 #define SDAUX_ID_END 3 /* end, _end, && _END_ symbol */
1210 #define SDAUX_ID_DYN 4 /* DYNAMIC && _DYNAMIC symbol */
1211 #define SDAUX_ID_PLT 5 /* _PROCEDURE_LINKAGE_TABLE_ symbol */
1212 #define SDAUX_ID_GOT 6 /* _GLOBAL_OFFSET_TABLE_ symbol */
1213 #define SDAUX_ID_START 7 /* START_ && _START_ symbol */
1214 #define SDAUX_ID_SECBOUND_START 8 /* __start_<section> symbols */
1215 #define SDAUX_ID_SECBOUND_STOP 9 /* __stop_<section> symbols */
1216
1217 /*
1218 * Flags for sym_desc.sd_flags
1219 */
1220 #define FLG_SY_MVTOCOMM 0x00000001 /* assign symbol to common (.bss) */
1221 /* this is a result of a */
1222 /* copy reloc against sym */
1223 #define FLG_SY_GLOBREF 0x00000002 /* a global reference has been seen */
1224 #define FLG_SY_WEAKDEF 0x00000004 /* a weak definition has been used */
1225 #define FLG_SY_CLEAN 0x00000008 /* `Sym' entry points to original */
1226 /* input file (read-only). */
1227 #define FLG_SY_UPREQD 0x00000010 /* symbol value update is required, */
1228 /* either it's used as an entry */
1229 /* point or for relocation, but */
1230 /* it must be updated even if */
1231 /* the -s flag is in effect */
1232 #define FLG_SY_NOTAVAIL 0x00000020 /* symbol is not available to the */
1233 /* application either because it */
1234 /* originates from an implicitly */
1235 /* referenced shared object, or */
1236 /* because it is not part of a */
1237 /* specified version. */
1238 #define FLG_SY_REDUCED 0x00000040 /* a global is reduced to local */
1239 #define FLG_SY_VERSPROM 0x00000080 /* version definition has been */
1240 /* promoted to output file */
1241 #define FLG_SY_PROT 0x00000100 /* stv_protected visibility seen */
1242 #define FLG_SY_MAPREF 0x00000200 /* symbol reference generated by user */
1243 /* from mapfile */
1244 #define FLG_SY_REFRSD 0x00000400 /* symbols sd_ref has been raised */
1245 /* due to a copy-relocs */
1246 /* weak-strong pairing */
1247 #define FLG_SY_INTPOSE 0x00000800 /* symbol defines an interposer */
1248 #define FLG_SY_INVALID 0x00001000 /* unwanted/erroneous symbol */
1249 #define FLG_SY_SMGOT 0x00002000 /* small got index assigned to symbol */
1250 /* sparc only */
1251 #define FLG_SY_PARENT 0x00004000 /* symbol to be found in parent */
1252 /* only used with direct bindings */
1253 #define FLG_SY_LAZYLD 0x00008000 /* symbol to cause lazyloading of */
1254 /* parent object */
1255 #define FLG_SY_ISDISC 0x00010000 /* symbol is a member of a DISCARDED */
1256 /* section (COMDAT) */
1257 #define FLG_SY_PAREXPN 0x00020000 /* partially init. symbol to be */
1258 /* expanded */
1259 #define FLG_SY_PLTPAD 0x00040000 /* pltpadding has been allocated for */
1260 /* this symbol */
1261 #define FLG_SY_REGSYM 0x00080000 /* REGISTER symbol (sparc only) */
1262 #define FLG_SY_SOFOUND 0x00100000 /* compared against an SO definition */
1263 #define FLG_SY_EXTERN 0x00200000 /* symbol is external, allows -zdefs */
1264 /* error suppression */
1265 #define FLG_SY_MAPUSED 0x00400000 /* mapfile symbol used (occurred */
1266 /* within a relocatable object) */
1267 #define FLG_SY_COMMEXP 0x00800000 /* COMMON symbol which has been */
1268 /* allocated */
1269 #define FLG_SY_CMDREF 0x01000000 /* symbol was referenced from the */
1270 /* command line. (ld -u <>, */
1271 /* ld -zrtldinfo=<>, ...) */
1272 #define FLG_SY_SPECSEC 0x02000000 /* section index is reserved value */
1273 /* ABS, COMMON, ... */
1274 #define FLG_SY_TENTSYM 0x04000000 /* tentative symbol */
1275 #define FLG_SY_VISIBLE 0x08000000 /* symbols visibility determined */
1276 #define FLG_SY_STDFLTR 0x10000000 /* symbol is a standard filter */
1277 #define FLG_SY_AUXFLTR 0x20000000 /* symbol is an auxiliary filter */
1278 #define FLG_SY_DYNSORT 0x40000000 /* req. in dyn[sym|tls]sort section */
1279 #define FLG_SY_NODYNSORT 0x80000000 /* excluded from dyn[sym_tls]sort sec */
1280
1281 #define FLG_SY_DEFAULT 0x0000100000000 /* global symbol, default */
1282 #define FLG_SY_SINGLE 0x0000200000000 /* global symbol, singleton defined */
1283 #define FLG_SY_PROTECT 0x0000400000000 /* global symbol, protected defined */
1284 #define FLG_SY_EXPORT 0x0000800000000 /* global symbol, exported defined */
1285
1286 #define MSK_SY_GLOBAL \
1287 (FLG_SY_DEFAULT | FLG_SY_SINGLE | FLG_SY_PROTECT | FLG_SY_EXPORT)
1288 /* this mask indicates that the */
1289 /* symbol has been explicitly */
1290 /* defined within a mapfile */
1291 /* definition, and is a candidate */
1292 /* for versioning */
1293
1294 #define FLG_SY_HIDDEN 0x0001000000000 /* global symbol, reduce to local */
1295 #define FLG_SY_ELIM 0x0002000000000 /* global symbol, eliminate */
1296 #define FLG_SY_IGNORE 0x0004000000000 /* global symbol, ignored */
1297
1298 #define MSK_SY_LOCAL (FLG_SY_HIDDEN | FLG_SY_ELIM | FLG_SY_IGNORE)
1299 /* this mask allows all local state */
1300 /* flags to be removed when the */
1301 /* symbol is copy relocated */
1302
1303 #define FLG_SY_EXPDEF 0x0008000000000 /* symbol visibility defined */
1304 /* explicitly */
1305
1306 #define MSK_SY_NOAUTO (FLG_SY_SINGLE | FLG_SY_EXPORT | FLG_SY_EXPDEF)
1307 /* this mask indicates that the */
1308 /* symbol is not a candidate for */
1309 /* auto-reduction/elimination */
1310
1311 #define FLG_SY_MAPFILE 0x0010000000000 /* symbol attribute defined in a */
1312 /* mapfile */
1313 #define FLG_SY_DIR 0x0020000000000 /* global symbol, direct bindings */
1314 #define FLG_SY_NDIR 0x0040000000000 /* global symbol, nondirect bindings */
1315 #define FLG_SY_OVERLAP 0x0080000000000 /* move entry overlap detected */
1316 #define FLG_SY_CAP 0x0100000000000 /* symbol is associated with */
1317 /* capabilities */
1318 #define FLG_SY_DEFERRED 0x0200000000000 /* symbol should not be bound to */
1319 /* during BIND_NOW relocations */
1320
1321 /*
1322 * A symbol can only be truly hidden if it is not a capabilities symbol.
1323 */
1324 #define SYM_IS_HIDDEN(_sdp) \
1325 (((_sdp)->sd_flags & (FLG_SY_HIDDEN | FLG_SY_CAP)) == FLG_SY_HIDDEN)
1326
1327 /*
1328 * Create a mask for (sym.st_other & visibility) since the gABI does not yet
1329 * define a ELF*_ST_OTHER macro.
1330 */
1331 #define MSK_SYM_VISIBILITY 0x7
1332
1333 /*
1334 * Structure to manage the shared object definition lists. There are two lists
1335 * that use this structure:
1336 *
1337 * - ofl_soneed; maintain the list of implicitly required dependencies
1338 * (ie. shared objects needed by other shared objects). These definitions
1339 * may include RPATH's required to locate the dependencies, and any
1340 * version requirements.
1341 *
1342 * - ofl_socntl; maintains the shared object control definitions. These are
1343 * provided by the user (via a mapfile) and are used to indicate any
1344 * version control requirements.
1345 */
1346 struct sdf_desc {
1347 const char *sdf_name; /* the shared objects file name */
1348 char *sdf_rpath; /* library search path DT_RPATH */
1349 const char *sdf_rfile; /* referencing file for diagnostics */
1350 Ifl_desc *sdf_file; /* the final input file descriptor */
1351 Alist *sdf_vers; /* list of versions that are required */
1352 /* from this object */
1353 Alist *sdf_verneed; /* list of VERNEEDS to create for */
1354 /* object via mapfile ADDVERS */
1355 Word sdf_flags;
1356 };
1357
1358 #define FLG_SDF_SELECT 0x01 /* version control selection required */
1359 #define FLG_SDF_VERIFY 0x02 /* version definition verification */
1360 /* required */
1361 #define FLG_SDF_ADDVER 0x04 /* add VERNEED references */
1362
1363 /*
1364 * Structure to manage shared object version usage requirements.
1365 */
1366 struct sdv_desc {
1367 const char *sdv_name; /* version name */
1368 const char *sdv_ref; /* versions reference */
1369 Word sdv_flags; /* flags */
1370 };
1371
1372 #define FLG_SDV_MATCHED 0x01 /* VERDEF found and matched */
1373
1374 /*
1375 * Structures to manage versioning information. Two versioning structures are
1376 * defined:
1377 *
1378 * - a version descriptor maintains a linked list of versions and their
1379 * associated dependencies. This is used to build the version definitions
1380 * for an image being created (see map_symbol), and to determine the
1381 * version dependency graph for any input files that are versioned.
1382 *
1383 * - a version index array contains each version of an input file that is
1384 * being processed. It informs us which versions are available for
1385 * binding, and is used to generate any version dependency information.
1386 */
1387 struct ver_desc {
1388 const char *vd_name; /* version name */
1389 Ifl_desc *vd_file; /* file that defined version */
1390 Word vd_hash; /* hash value of name */
1391 Half vd_ndx; /* coordinates with symbol index */
1392 Half vd_flags; /* version information */
1393 APlist *vd_deps; /* version dependencies */
1394 Ver_desc *vd_ref; /* dependency's first reference */
1395 };
1396
1397 struct ver_index {
1398 const char *vi_name; /* dependency version name */
1399 Half vi_flags; /* communicates availability */
1400 Half vi_overndx; /* index assigned to this version in */
1401 /* output object Verneed section */
1402 Ver_desc *vi_desc; /* cross reference to descriptor */
1403 };
1404
1405 /*
1406 * Define any internal version descriptor flags ([vd|vi]_flags). Note that the
1407 * first byte is reserved for user visible flags (refer VER_FLG's in link.h).
1408 */
1409 #define MSK_VER_USER 0x0f /* mask for user visible flags */
1410
1411 #define FLG_VER_AVAIL 0x10 /* version is available for binding */
1412 #define FLG_VER_REFER 0x20 /* version has been referenced */
1413 #define FLG_VER_CYCLIC 0x40 /* a member of cyclic dependency */
1414
1415 /*
1416 * isalist(1) descriptor - used to break an isalist string into its component
1417 * options.
1418 */
1419 struct isa_opt {
1420 char *isa_name; /* individual isa option name */
1421 size_t isa_namesz; /* and associated size */
1422 };
1423
1424 struct isa_desc {
1425 char *isa_list; /* sysinfo(SI_ISALIST) list */
1426 size_t isa_listsz; /* and associated size */
1427 Isa_opt *isa_opt; /* table of individual isa options */
1428 size_t isa_optno; /* and associated number */
1429 };
1430
1431 /*
1432 * uname(2) descriptor - used to break a utsname structure into its component
1433 * options (at least those that we're interested in).
1434 */
1435 struct uts_desc {
1436 char *uts_osname; /* operating system name */
1437 size_t uts_osnamesz; /* and associated size */
1438 char *uts_osrel; /* operating system release */
1439 size_t uts_osrelsz; /* and associated size */
1440 };
1441
1442 /*
1443 * SHT_GROUP descriptor - used to track group sections at the global
1444 * level to resolve conflicts and determine which to keep.
1445 */
1446 struct group_desc {
1447 Is_desc *gd_isc; /* input section descriptor */
1448 Is_desc *gd_oisc; /* overriding input section */
1449 /* descriptor when discarded */
1450 const char *gd_name; /* group name (signature symbol) */
1451 Word *gd_data; /* data for group section */
1452 size_t gd_cnt; /* number of entries in group data */
1453 };
1454
1455 /*
1456 * Indexes into the ld_support_funcs[] table.
1457 */
1458 typedef enum {
1459 LDS_VERSION = 0, /* Must be first and have value 0 */
1460 LDS_INPUT_DONE,
1461 LDS_START,
1462 LDS_ATEXIT,
1463 LDS_OPEN,
1464 LDS_FILE,
1465 LDS_INSEC,
1466 LDS_SEC,
1467 LDS_NUM
1468 } Support_ndx;
1469
1470 /*
1471 * Structure to manage archive member caching. Each archive has an archive
1472 * descriptor (Ar_desc) associated with it. This contains pointers to the
1473 * archive symbol table (obtained by elf_getarsyms(3e)) and an auxiliary
1474 * structure (Ar_uax[]) that parallels this symbol table. The member element
1475 * of this auxiliary table indicates whether the archive member associated with
1476 * the symbol offset has already been extracted (AREXTRACTED) or partially
1477 * processed (refer process_member()).
1478 */
1479 typedef struct ar_mem {
1480 Elf *am_elf; /* elf descriptor for this member */
1481 const char *am_name; /* members name */
1482 const char *am_path; /* path (ie. lib(foo.o)) */
1483 Sym *am_syms; /* start of global symbols */
1484 char *am_strs; /* associated string table start */
1485 Xword am_symn; /* no. of global symbols */
1486 } Ar_mem;
1487
1488 typedef struct ar_aux {
1489 Sym_desc *au_syms; /* internal symbol descriptor */
1490 Ar_mem *au_mem; /* associated member */
1491 } Ar_aux;
1492
1493 #define FLG_ARMEM_PROC (Ar_mem *)-1
1494
1495 typedef struct ar_desc {
1496 const char *ad_name; /* archive file name */
1497 Elf *ad_elf; /* elf descriptor for the archive */
1498 Elf_Arsym *ad_start; /* archive symbol table start */
1499 Ar_aux *ad_aux; /* auxiliary symbol information */
1500 dev_t ad_stdev; /* device id and inode number for */
1501 ino_t ad_stino; /* multiple inclusion checks */
1502 ofl_flag_t ad_flags; /* archive specific cmd line flags */
1503 } Ar_desc;
1504
1505 /*
1506 * Define any archive descriptor flags. NOTE, make sure they do not clash with
1507 * any output file descriptor archive extraction flags, as these are saved in
1508 * the same entry (see MSK_OF1_ARCHIVE).
1509 */
1510 #define FLG_ARD_EXTRACT 0x00010000 /* archive member has been extracted */
1511
1512 /* Mapfile versions supported by libld */
1513 #define MFV_NONE 0 /* Not a valid version */
1514 #define MFV_SYSV 1 /* Original System V syntax */
1515 #define MFV_SOLARIS 2 /* Solaris mapfile syntax */
1516 #define MFV_NUM 3 /* # of mapfile versions */
1517
1518
1519 /*
1520 * Function Declarations.
1521 */
1522 #if defined(_ELF64)
1523
1524 #define ld_create_outfile ld64_create_outfile
1525 #define ld_ent_setup ld64_ent_setup
1526 #define ld_init_strings ld64_init_strings
1527 #define ld_init_target ld64_init_target
1528 #define ld_make_sections ld64_make_sections
1529 #define ld_main ld64_main
1530 #define ld_ofl_cleanup ld64_ofl_cleanup
1531 #define ld_process_mem ld64_process_mem
1532 #define ld_reloc_init ld64_reloc_init
1533 #define ld_reloc_process ld64_reloc_process
1534 #define ld_sym_validate ld64_sym_validate
1535 #define ld_update_outfile ld64_update_outfile
1536
1537 #else
1538
1539 #define ld_create_outfile ld32_create_outfile
1540 #define ld_ent_setup ld32_ent_setup
1541 #define ld_init_strings ld32_init_strings
1542 #define ld_init_target ld32_init_target
1543 #define ld_make_sections ld32_make_sections
1544 #define ld_main ld32_main
1545 #define ld_ofl_cleanup ld32_ofl_cleanup
1546 #define ld_process_mem ld32_process_mem
1547 #define ld_reloc_init ld32_reloc_init
1548 #define ld_reloc_process ld32_reloc_process
1549 #define ld_sym_validate ld32_sym_validate
1550 #define ld_update_outfile ld32_update_outfile
1551
1552 #endif
1553
1554 extern int ld_getopt(Lm_list *, int, int, char **);
1555
1556 extern int ld32_main(int, char **, Half);
1557 extern int ld64_main(int, char **, Half);
1558
1559 extern uintptr_t ld_create_outfile(Ofl_desc *);
1560 extern uintptr_t ld_ent_setup(Ofl_desc *, Xword);
1561 extern uintptr_t ld_init_strings(Ofl_desc *);
1562 extern int ld_init_target(Lm_list *, Half mach);
1563 extern uintptr_t ld_make_sections(Ofl_desc *);
1564 extern void ld_ofl_cleanup(Ofl_desc *);
1565 extern Ifl_desc *ld_process_mem(const char *, const char *, char *,
1566 size_t, Ofl_desc *, Rej_desc *);
1567 extern uintptr_t ld_reloc_init(Ofl_desc *);
1568 extern uintptr_t ld_reloc_process(Ofl_desc *);
1569 extern uintptr_t ld_sym_validate(Ofl_desc *);
1570 extern uintptr_t ld_update_outfile(Ofl_desc *);
1571
1572 #ifdef __cplusplus
1573 }
1574 #endif
1575
1576 #endif /* _LIBLD_H */