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10366 ld(1) should support GNU-style linker sets
10367 ld(1) tests should be a real test suite
10368 want an ld(1) regression test for i386 LD tls transition (10267)
ld: implement -ztype and rework option parsing
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--- old/usr/src/cmd/sgs/include/libld.h
+++ new/usr/src/cmd/sgs/include/libld.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright (c) 1988 AT&T
24 24 * All Rights Reserved
25 25 *
26 26 * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
27 27 */
28 28
29 29 #ifndef _LIBLD_H
30 30 #define _LIBLD_H
31 31
32 32 #include <stdlib.h>
33 33 #include <libelf.h>
34 34 #include <sgs.h>
35 35 #include <_machelf.h>
36 36 #include <string_table.h>
37 37 #include <sys/avl.h>
38 38 #include <alist.h>
39 39 #include <elfcap.h>
40 40
41 41 #ifdef __cplusplus
42 42 extern "C" {
43 43 #endif
44 44
45 45 /*
46 46 * Default directory search path manipulation for the link-editor. YLDIR
47 47 * indicates which directory in LIBPATH is replaced by the -YL option to cc
48 48 * and ld. YUDIR indicates which directory is replaced by -YU.
49 49 */
50 50 #define YLDIR 1
51 51 #define YUDIR 2
52 52
53 53 /*
54 54 * Define a hash value that can never be returned from elf_hash().
55 55 */
56 56 #define SYM_NOHASH (~(Word)0)
57 57
58 58 /*
59 59 * Macro that can be used to represent both ORDER flags
60 60 * in a section header.
61 61 */
62 62 #define ALL_SHF_ORDER (SHF_ORDERED | SHF_LINK_ORDER)
63 63
64 64 /*
65 65 * The linker merges (concatenates) sections with the same name and
66 66 * compatible section header flags. When comparing these flags,
67 67 * there are some that should not be included in the decision.
68 68 * The ALL_SHF_IGNORE constant defines these flags.
69 69 *
70 70 * NOTE: SHF_MERGE|SHF_STRINGS:
71 71 * The compiler is allowed to set the SHF_MERGE|SHF_STRINGS flags in
72 72 * order to tell the linker that:
73 73 *
74 74 * 1) There is nothing in the section except null terminated strings.
75 75 * 2) Those strings do not contain NULL bytes, except as termination.
76 76 * 3) All references to these strings occur via standard relocation
77 77 * records.
78 78 *
79 79 * As a result, if two compatible sections both have these flags set, it is
80 80 * OK to combine the strings they contain into a single merged string table
81 81 * with duplicates removed and tail strings merged.
82 82 *
83 83 * This is a different meaning than the simple concatenating of sections
84 84 * that the linker always does. It is a hint that an additional optimization
85 85 * is possible, but not required. This means that sections that do not
86 86 * share the same SHF_MERGE|SHF_STRINGS values can be concatenated,
87 87 * but cannot have their duplicate strings combined. Hence, the
88 88 * SHF_MERGE|SHF_STRINGS flags should be ignored when deciding whether
89 89 * two sections can be concatenated.
90 90 */
91 91 #define ALL_SHF_IGNORE (ALL_SHF_ORDER | SHF_GROUP | SHF_MERGE | SHF_STRINGS)
92 92
93 93 /*
94 94 * Define symbol reference types for use in symbol resolution.
95 95 */
96 96 typedef enum {
97 97 REF_DYN_SEEN, /* a .so symbol has been seen */
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98 98 REF_DYN_NEED, /* a .so symbol satisfies a .o symbol */
99 99 REF_REL_NEED, /* a .o symbol */
100 100 REF_NUM /* the number of symbol references */
101 101 } Symref;
102 102
103 103 /*
104 104 * Relocation descriptor cache
105 105 */
106 106 struct rel_cache {
107 107 APlist *rc_list; /* list of Rel_cachebuf */
108 - Word rc_cnt; /* and count */
108 + Word rc_cnt; /* and count */
109 109 };
110 110
111 111 /*
112 112 * GOT reference models
113 113 */
114 114 typedef enum {
115 115 GOT_REF_GENERIC, /* generic symbol reference */
116 116 GOT_REF_TLSIE, /* TLS initial exec (gnu) reference */
117 117 GOT_REF_TLSLD, /* TLS local dynamic reference */
118 118 GOT_REF_TLSGD /* TLS general dynamic reference */
119 119 } Gotref;
120 120
121 121 typedef struct {
122 122 Xword gn_addend; /* addend associated with GOT entry */
123 123 Sword gn_gotndx; /* GOT table index */
124 124 Gotref gn_gotref;
125 125 } Gotndx;
126 126
127 127 /*
128 128 * Got debugging structure. The got index is defined as a signed value as we
129 129 * do so much mucking around with negative and positive gots on SPARC, and sign
130 130 * extension is necessary when building 64-bit objects. On intel we explicitly
131 131 * cast this variable to an unsigned value.
132 132 */
133 133 typedef struct {
134 134 Sym_desc *gt_sym;
135 135 Gotndx gt_gndx;
136 136 } Gottable;
137 137
138 138 /*
139 139 * The link-editor caches the results of sloppy relocation processing
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140 140 * in a variable of type Rlxrel_cache. Symbols come for processing in sorted
141 141 * order, so a single item cache suffices to eliminate duplicate lookups.
142 142 *
143 143 * When sloppy relocation processing fails, the Rlxrel_rej enum reports
144 144 * the underlying reason.
145 145 */
146 146 typedef enum {
147 147 RLXREL_REJ_NONE = 0, /* Replacement symbol was found */
148 148 RLXREL_REJ_TARGET, /* Target sec disallows relaxed relocations */
149 149 RLXREL_REJ_SECTION, /* Either there is no replacement section, */
150 - /* or its attributes are incompatible */
150 + /* or its attributes are incompatible */
151 151 RLXREL_REJ_SYMBOL, /* Replacement symbol not found */
152 152 } Rlxrel_rej;
153 153
154 154 typedef struct sreloc_cache {
155 155 Sym_desc *sr_osdp; /* Original symbol */
156 156 Sym_desc *sr_rsdp; /* Replacement symbol */
157 157 Rlxrel_rej sr_rej; /* Reason for failure if NULL sr_rsdp */
158 158 } Rlxrel_cache;
159 159
160 160 /*
161 161 * Nodes in an ofl_wrap AVL tree
162 162 *
163 163 * wsn_name is the name of the symbol to be wrapped. wsn_wrapname is used
164 164 * when we need to refer to the wrap symbol, and consists of the symbol
165 165 * name with a __wrap_ prefix.
166 166 */
167 167 typedef struct wrap_sym_node {
168 168 avl_node_t wsn_avlnode; /* AVL book-keeping */
169 169 const char *wsn_name; /* Symbol name: XXX */
170 170 const char *wsn_wrapname; /* Wrap symbol name: __wrap_XXX */
171 171 } WrapSymNode;
172 172
173 173 /*
174 174 * Capabilities structures, used to maintain a capabilities set.
175 175 *
176 176 * Capabilities can be defined within input relocatable objects, and can be
177 177 * augmented or replaced by mapfile directives. In addition, mapfile directives
178 178 * can be used to exclude capabilities that would otherwise be carried over to
179 179 * the output object.
180 180 *
181 181 * CA_SUNW_HW_1, CA_SUNW_SF_1 and CA_SUNW_HW_2 values are bitmasks. A current
182 182 * value, and an exclude value are maintained for each capability.
183 183 *
184 184 * There can be multiple CA_SUNW_PLAT and CA_SUNW_MACH entries and thus Alists
185 185 * are used to collect these entries. A current list for each capability is
186 186 * maintained as Capstr entries, which provide for maintaining the strings
187 187 * eventual index into a string table. An exclude list is maintained as a
188 188 * list of string pointers.
189 189 */
190 190 typedef struct {
191 191 elfcap_mask_t cm_val; /* bitmask value */
192 192 elfcap_mask_t cm_exc; /* bits to exclude from final object */
193 193 } Capmask;
194 194
195 195 typedef struct {
196 196 Alist *cl_val; /* string (Capstr) value */
197 197 APlist *cl_exc; /* strings to exclude from final */
198 198 } Caplist; /* object */
199 199
200 200 typedef struct {
201 201 char *cs_str; /* platform or machine name */
202 202 Word cs_ndx; /* the entries output Cap index */
203 203 } Capstr;
204 204
205 205 typedef uint_t oc_flag_t;
206 206 typedef struct {
207 207 Capmask oc_hw_1; /* CA_SUNW_HW_1 capabilities */
208 208 Capmask oc_sf_1; /* CA_SUNW_SF_1 capabilities */
209 209 Capmask oc_hw_2; /* CA_SUNW_HW_2 capabilities */
210 210 Caplist oc_plat; /* CA_SUNW_PLAT capabilities */
211 211 Caplist oc_mach; /* CA_SUNW_MACH capabilities */
212 212 Capstr oc_id; /* CA_SUNW_ID capability */
213 213 oc_flag_t oc_flags;
214 214 } Objcapset;
215 215
216 216 #define FLG_OCS_USRDEFID 0x1 /* user defined CA_SUNW_ID */
217 217
218 218 /*
219 219 * Bitmasks for a single capability. Capabilities come from input objects,
220 220 * augmented or replaced by mapfile directives. In addition, mapfile directives
221 221 * can be used to exclude bits that would otherwise be set in the output object.
222 222 */
223 223 typedef struct {
224 224 elfcap_mask_t cm_value; /* Bitmask value */
225 225 elfcap_mask_t cm_exclude; /* Bits to remove from final object */
226 226 } CapMask;
227 227
228 228 /*
229 229 * Combine the bitmask in a CapMask with the exclusion mask and
230 230 * return the resulting final value.
231 231 */
232 232 #define CAPMASK_VALUE(_cbmp) ((_cbmp)->cm_value & ~(_cbmp)->cm_exclude)
233 233
234 234 typedef struct {
235 235 CapMask c_hw_1; /* CA_SUNW_HW_1 capabilities */
236 236 CapMask c_sf_1; /* CA_SUNW_SF_1 capabilities */
237 237 CapMask c_hw_2; /* CA_SUNW_HW_2 capabilities */
238 238 } Outcapset;
239 239
240 240
241 241 /*
242 242 * Output file processing structure
243 243 */
244 244 typedef Lword ofl_flag_t;
245 245 typedef Word ofl_guideflag_t;
246 246 struct ofl_desc {
247 247 char *ofl_sgsid; /* link-editor identification */
248 248 const char *ofl_name; /* full file name */
249 249 Elf *ofl_elf; /* elf_memory() elf descriptor */
250 250 Elf *ofl_welf; /* ELF_C_WRITE elf descriptor */
251 251 Ehdr *ofl_dehdr; /* default elf header, and new elf */
252 252 Ehdr *ofl_nehdr; /* header describing this file */
253 253 Phdr *ofl_phdr; /* program header descriptor */
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254 254 Phdr *ofl_tlsphdr; /* TLS phdr */
255 255 int ofl_fd; /* file descriptor */
256 256 size_t ofl_size; /* image size */
257 257 APlist *ofl_maps; /* list of input mapfiles */
258 258 APlist *ofl_segs; /* list of segments */
259 259 APlist *ofl_segs_order; /* SEGMENT_ORDER segments */
260 260 avl_tree_t ofl_segs_avl; /* O(log N) access to named segments */
261 261 APlist *ofl_ents; /* list of entrance descriptors */
262 262 avl_tree_t ofl_ents_avl; /* O(log N) access to named ent. desc */
263 263 APlist *ofl_objs; /* relocatable object file list */
264 - Word ofl_objscnt; /* and count */
264 + Word ofl_objscnt; /* and count */
265 265 APlist *ofl_ars; /* archive library list */
266 - Word ofl_arscnt; /* and count */
266 + Word ofl_arscnt; /* and count */
267 267 int ofl_ars_gsandx; /* archive group argv index. 0 means */
268 268 /* no current group, < 0 means */
269 269 /* error reported. >0 is cur ndx */
270 270 Word ofl_ars_gsndx; /* current -zrescan-start ofl_ars ndx */
271 271 APlist *ofl_sos; /* shared object list */
272 - Word ofl_soscnt; /* and count */
272 + Word ofl_soscnt; /* and count */
273 273 APlist *ofl_soneed; /* list of implicitly required .so's */
274 274 APlist *ofl_socntl; /* list of .so control definitions */
275 275 Rel_cache ofl_outrels; /* list of output relocations */
276 276 Rel_cache ofl_actrels; /* list of relocations to perform */
277 277 APlist *ofl_relaux; /* Rel_aux cache for outrels/actrels */
278 278 Word ofl_entrelscnt; /* no of relocations entered */
279 279 Alist *ofl_copyrels; /* list of copy relocations */
280 280 APlist *ofl_ordered; /* list of shf_ordered sections */
281 281 APlist *ofl_symdtent; /* list of syminfo symbols that need */
282 282 /* to reference .dynamic entries */
283 283 APlist *ofl_ismove; /* list of .SUNW_move sections */
284 284 APlist *ofl_ismoverel; /* list of relocation input section */
285 285 /* targeting to expanded area */
286 - APlist *ofl_parsyms; /* list of partially initialized */
286 + APlist *ofl_parsyms; /* list of partially initialized */
287 287 /* symbols (ie. move symbols) */
288 288 APlist *ofl_extrarels; /* relocation sections which have */
289 289 /* a NULL sh_info */
290 290 avl_tree_t *ofl_groups; /* pointer to head of Groups AVL tree */
291 291 APlist *ofl_initarray; /* list of init array func names */
292 292 APlist *ofl_finiarray; /* list of fini array func names */
293 293 APlist *ofl_preiarray; /* list of preinit array func names */
294 294 APlist *ofl_rtldinfo; /* list of rtldinfo syms */
295 295 APlist *ofl_osgroups; /* list of output GROUP sections */
296 296 APlist *ofl_ostlsseg; /* pointer to sections in TLS segment */
297 297 APlist *ofl_unwind; /* list of unwind output sections */
298 298 Os_desc *ofl_unwindhdr; /* Unwind hdr */
299 299 avl_tree_t ofl_symavl; /* pointer to head of Syms AVL tree */
300 300 Sym_desc **ofl_regsyms; /* array of potential register */
301 301 Word ofl_regsymsno; /* symbols and array count */
302 302 Word ofl_regsymcnt; /* no. of output register symbols */
303 303 Word ofl_lregsymcnt; /* no. of local register symbols */
304 304 Sym_desc *ofl_dtracesym; /* ld -zdtrace= */
305 305 ofl_flag_t ofl_flags; /* various state bits, args etc. */
306 306 ofl_flag_t ofl_flags1; /* more flags */
307 307 void *ofl_entry; /* entry point (-e and Sym_desc *) */
308 308 char *ofl_filtees; /* shared objects we are a filter for */
309 309 const char *ofl_soname; /* (-h option) output file name for */
310 310 /* dynamic structure */
311 311 const char *ofl_interp; /* interpreter name used by exec() */
312 312 char *ofl_rpath; /* run path to store in .dynamic */
313 313 char *ofl_config; /* config path to store in .dynamic */
314 314 APlist *ofl_ulibdirs; /* user supplied library search list */
315 315 APlist *ofl_dlibdirs; /* default library search list */
316 316 Word ofl_vercnt; /* number of versions to generate */
317 317 APlist *ofl_verdesc; /* list of version descriptors */
318 318 size_t ofl_verdefsz; /* size of version definition section */
319 319 size_t ofl_verneedsz; /* size of version needed section */
320 320 Word ofl_entercnt; /* no. of global symbols entered */
321 321 Word ofl_globcnt; /* no. of global symbols to output */
322 322 Word ofl_scopecnt; /* no. of scoped symbols to output */
323 323 Word ofl_dynscopecnt; /* no. scoped syms in .SUNW_ldynsym */
324 324 Word ofl_elimcnt; /* no. of eliminated symbols */
325 325 Word ofl_locscnt; /* no. of local symbols in .symtab */
326 326 Word ofl_dynlocscnt; /* no. local symbols in .SUNW_ldynsym */
327 327 Word ofl_dynsymsortcnt; /* no. ndx in .SUNW_dynsymsort */
328 328 Word ofl_dyntlssortcnt; /* no. ndx in .SUNW_dyntlssort */
329 329 Word ofl_dynshdrcnt; /* no. of output section in .dynsym */
330 330 Word ofl_shdrcnt; /* no. of output sections */
331 331 Word ofl_caploclcnt; /* no. of local capabilities symbols */
332 332 Word ofl_capsymcnt; /* no. of symbol capabilities entries */
333 333 /* required */
334 334 Word ofl_capchaincnt; /* no. of Capchain symbols */
335 335 APlist *ofl_capgroups; /* list of capabilities groups */
336 336 avl_tree_t *ofl_capfamilies; /* capability family AVL tree */
337 337 Str_tbl *ofl_shdrsttab; /* Str_tbl for shdr strtab */
338 338 Str_tbl *ofl_strtab; /* Str_tbl for symtab strtab */
339 339 Str_tbl *ofl_dynstrtab; /* Str_tbl for dymsym strtab */
340 340 Gotndx *ofl_tlsldgotndx; /* index to LD TLS_index structure */
341 341 Xword ofl_relocsz; /* size of output relocations */
342 342 Xword ofl_relocgotsz; /* size of .got relocations */
343 343 Xword ofl_relocpltsz; /* size of .plt relocations */
344 344 Xword ofl_relocbsssz; /* size of .bss (copy) relocations */
345 345 Xword ofl_relocrelsz; /* size of .rel[a] relocations */
346 346 Word ofl_relocincnt; /* no. of input relocations */
347 347 Word ofl_reloccnt; /* tot number of output relocations */
348 348 Word ofl_reloccntsub; /* tot numb of output relocations to */
349 349 /* skip (-zignore) */
350 350 Word ofl_relocrelcnt; /* tot number of relative */
351 351 /* relocations */
352 352 Word ofl_gotcnt; /* no. of .got entries */
353 353 Word ofl_pltcnt; /* no. of .plt entries */
354 354 Word ofl_pltpad; /* no. of .plt padd entries */
355 355 Word ofl_hashbkts; /* no. of hash buckets required */
356 356 Is_desc *ofl_isbss; /* .bss input section (globals) */
357 357 Is_desc *ofl_islbss; /* .lbss input section (globals) */
358 358 Is_desc *ofl_istlsbss; /* .tlsbss input section (globals) */
359 359 Is_desc *ofl_isparexpn; /* -z nopartial .data input section */
360 360 Os_desc *ofl_osdynamic; /* .dynamic output section */
361 361 Os_desc *ofl_osdynsym; /* .dynsym output section */
362 362 Os_desc *ofl_osldynsym; /* .SUNW_ldynsym output section */
363 363 Os_desc *ofl_osdynstr; /* .dynstr output section */
364 364 Os_desc *ofl_osdynsymsort; /* .SUNW_dynsymsort output section */
365 365 Os_desc *ofl_osdyntlssort; /* .SUNW_dyntlssort output section */
366 366 Os_desc *ofl_osgot; /* .got output section */
367 367 Os_desc *ofl_oshash; /* .hash output section */
368 368 Os_desc *ofl_osinitarray; /* .init_array output section */
369 369 Os_desc *ofl_osfiniarray; /* .fini_array output section */
370 370 Os_desc *ofl_ospreinitarray; /* .preinit_array output section */
371 371 Os_desc *ofl_osinterp; /* .interp output section */
372 372 Os_desc *ofl_oscap; /* .SUNW_cap output section */
373 373 Os_desc *ofl_oscapinfo; /* .SUNW_capinfo output section */
374 374 Os_desc *ofl_oscapchain; /* .SUNW_capchain output section */
375 375 Os_desc *ofl_osplt; /* .plt output section */
376 376 Os_desc *ofl_osmove; /* .SUNW_move output section */
377 377 Os_desc *ofl_osrelhead; /* first relocation section */
378 378 Os_desc *ofl_osrel; /* .rel[a] relocation section */
379 379 Os_desc *ofl_osshstrtab; /* .shstrtab output section */
380 380 Os_desc *ofl_osstrtab; /* .strtab output section */
381 381 Os_desc *ofl_ossymtab; /* .symtab output section */
382 382 Os_desc *ofl_ossymshndx; /* .symtab_shndx output section */
383 383 Os_desc *ofl_osdynshndx; /* .dynsym_shndx output section */
384 384 Os_desc *ofl_osldynshndx; /* .SUNW_ldynsym_shndx output sec */
385 385 Os_desc *ofl_osverdef; /* .version definition output section */
386 386 Os_desc *ofl_osverneed; /* .version needed output section */
387 387 Os_desc *ofl_osversym; /* .version symbol ndx output section */
388 388 Word ofl_dtflags_1; /* DT_FLAGS_1 entries */
389 389 Word ofl_dtflags; /* DT_FLAGS entries */
390 390 Os_desc *ofl_ossyminfo; /* .SUNW_syminfo output section */
391 391 Half ofl_parexpnndx; /* -z nopartial section index */
392 392 /* Ref. at perform_outreloc() in */
393 393 /* libld/{mach}/machrel.c */
394 394 Xword *ofl_checksum; /* DT_CHECKSUM value address */
395 395 char *ofl_depaudit; /* dependency auditing required (-P) */
396 396 char *ofl_audit; /* object auditing required (-p) */
397 397 Alist *ofl_symfltrs; /* per-symbol filtees and their */
398 398 Alist *ofl_dtsfltrs; /* associated .dynamic/.dynstrs */
399 399 Objcapset ofl_ocapset; /* object capabilities */
400 400 Lm_list *ofl_lml; /* runtime link-map list */
401 401 Gottable *ofl_gottable; /* debugging got information */
402 402 Rlxrel_cache ofl_sr_cache; /* Cache last result from */
403 403 /* sloppy_comdat_reloc() */
404 404 APlist *ofl_maptext; /* mapfile added text sections */
405 405 APlist *ofl_mapdata; /* mapfile added data sections */
406 406 avl_tree_t *ofl_wrap; /* -z wrap symbols */
407 407 ofl_guideflag_t ofl_guideflags; /* -z guide flags */
408 408 APlist *ofl_assdeflib; /* -z assert-deflib exceptions */
409 409 int ofl_aslr; /* -z aslr, -1 disable, 1 enable */
410 410 };
411 411
412 412 #define FLG_OF_DYNAMIC 0x00000001 /* generate dynamic output module */
413 413 #define FLG_OF_STATIC 0x00000002 /* generate static output module */
414 414 #define FLG_OF_EXEC 0x00000004 /* generate an executable */
415 415 #define FLG_OF_RELOBJ 0x00000008 /* generate a relocatable object */
416 416 #define FLG_OF_SHAROBJ 0x00000010 /* generate a shared object */
417 417 #define FLG_OF_BFLAG 0x00000020 /* do no special plt building: -b */
418 418 #define FLG_OF_IGNENV 0x00000040 /* ignore LD_LIBRARY_PATH: -i */
419 419 #define FLG_OF_STRIP 0x00000080 /* strip output: -s */
420 420 #define FLG_OF_NOWARN 0x00000100 /* disable symbol warnings: -t */
421 421 #define FLG_OF_NOUNDEF 0x00000200 /* allow no undefined symbols: -zdefs */
422 422 #define FLG_OF_PURETXT 0x00000400 /* allow no text relocations: -ztext */
423 423 #define FLG_OF_GENMAP 0x00000800 /* generate a memory map: -m */
424 424 #define FLG_OF_DYNLIBS 0x00001000 /* dynamic input allowed: -Bdynamic */
425 425 #define FLG_OF_SYMBOLIC 0x00002000 /* bind global symbols: -Bsymbolic */
426 426 #define FLG_OF_ADDVERS 0x00004000 /* add version stamp: -Qy */
427 427 #define FLG_OF_NOLDYNSYM 0x00008000 /* -znoldynsym set */
428 428 #define FLG_OF_IS_ORDER 0x00010000 /* input section ordering within a */
429 429 /* segment is required */
430 430 #define FLG_OF_EC_FILES 0x00020000 /* Ent_desc exist w/non-NULL ec_files */
431 431 #define FLG_OF_TEXTREL 0x00040000 /* text relocations have been found */
432 432 #define FLG_OF_MULDEFS 0x00080000 /* multiple symbols are allowed */
433 433 #define FLG_OF_TLSPHDR 0x00100000 /* a TLS program header is required */
434 434 #define FLG_OF_BLDGOT 0x00200000 /* build GOT table */
435 435 #define FLG_OF_VERDEF 0x00400000 /* record version definitions */
436 436 #define FLG_OF_VERNEED 0x00800000 /* record version dependencies */
437 437 #define FLG_OF_NOVERSEC 0x01000000 /* don't record version sections */
438 438 #define FLG_OF_KEY 0x02000000 /* file requires sort keys */
439 439 #define FLG_OF_PROCRED 0x04000000 /* process any symbol reductions by */
440 440 /* effecting the symbol table */
441 441 /* output and relocations */
442 442 #define FLG_OF_SYMINFO 0x08000000 /* create a syminfo section */
443 443 #define FLG_OF_AUX 0x10000000 /* ofl_filter is an auxiliary filter */
444 444 #define FLG_OF_FATAL 0x20000000 /* fatal error during input */
445 445 #define FLG_OF_WARN 0x40000000 /* warning during input processing. */
446 446 #define FLG_OF_VERBOSE 0x80000000 /* -z verbose flag set */
447 447
448 448 #define FLG_OF_MAPSYMB 0x000100000000 /* symbolic scope definition seen */
449 449 #define FLG_OF_MAPGLOB 0x000200000000 /* global scope definition seen */
450 450 #define FLG_OF_COMREL 0x000400000000 /* -z combreloc set, which enables */
451 451 /* DT_RELACNT tracking, */
452 452 #define FLG_OF_NOCOMREL 0x000800000000 /* -z nocombreloc set */
453 453 #define FLG_OF_AUTOLCL 0x001000000000 /* automatically reduce unspecified */
454 454 /* global symbols to locals */
455 455 #define FLG_OF_AUTOELM 0x002000000000 /* automatically eliminate */
456 456 /* unspecified global symbols */
457 457 #define FLG_OF_REDLSYM 0x004000000000 /* reduce local symbols */
458 458 #define FLG_OF_OS_ORDER 0x008000000000 /* output section ordering required */
459 459 #define FLG_OF_OSABI 0x010000000000 /* tag object as ELFOSABI_SOLARIS */
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460 460 #define FLG_OF_ADJOSCNT 0x020000000000 /* adjust ofl_shdrcnt to accommodate */
461 461 /* discarded sections */
462 462 #define FLG_OF_OTOSCAP 0x040000000000 /* convert object capabilities to */
463 463 /* symbol capabilities */
464 464 #define FLG_OF_PTCAP 0x080000000000 /* PT_SUNWCAP required */
465 465 #define FLG_OF_CAPSTRS 0x100000000000 /* capability strings are required */
466 466 #define FLG_OF_EHFRAME 0x200000000000 /* output contains .eh_frame section */
467 467 #define FLG_OF_FATWARN 0x400000000000 /* make warnings fatal */
468 468 #define FLG_OF_ADEFLIB 0x800000000000 /* no libraries in default path */
469 469
470 +#define FLG_OF_KMOD 0x1000000000000 /* output is a kernel module */
471 +
470 472 /*
471 473 * In the flags1 arena, establish any options that are applicable to archive
472 474 * extraction first, and associate a mask. These values are recorded with any
473 475 * archive descriptor so that they may be reset should the archive require a
474 476 * rescan to try and resolve undefined symbols.
475 477 */
476 478 #define FLG_OF1_ALLEXRT 0x0000000001 /* extract all members from an */
477 479 /* archive file */
478 480 #define FLG_OF1_WEAKEXT 0x0000000002 /* allow archive extraction to */
479 481 /* resolve weak references */
480 482 #define MSK_OF1_ARCHIVE 0x0000000003 /* archive flags mask */
481 483
482 484 #define FLG_OF1_NOINTRP 0x0000000008 /* -z nointerp flag set */
483 485 #define FLG_OF1_ZDIRECT 0x0000000010 /* -z direct flag set */
484 486 #define FLG_OF1_NDIRECT 0x0000000020 /* no-direct bindings specified */
485 487 #define FLG_OF1_DEFERRED 0x0000000040 /* deferred dependency recording */
486 488
487 489 #define FLG_OF1_RELDYN 0x0000000100 /* process .dynamic in rel obj */
488 490 #define FLG_OF1_NRLXREL 0x0000000200 /* -z norelaxreloc flag set */
489 491 #define FLG_OF1_RLXREL 0x0000000400 /* -z relaxreloc flag set */
490 492 #define FLG_OF1_IGNORE 0x0000000800 /* ignore unused dependencies */
491 493 #define FLG_OF1_NOSGHND 0x0000001000 /* -z nosighandler flag set */
492 494 #define FLG_OF1_TEXTOFF 0x0000002000 /* text relocations are ok */
493 495 #define FLG_OF1_ABSEXEC 0x0000004000 /* -zabsexec set */
494 496 #define FLG_OF1_LAZYLD 0x0000008000 /* lazy loading of objects enabled */
495 497 #define FLG_OF1_GRPPRM 0x0000010000 /* dependencies are to have */
496 498 /* GROUPPERM enabled */
497 499
498 500 #define FLG_OF1_NOPARTI 0x0000040000 /* -znopartial set */
499 501 #define FLG_OF1_BSSOREL 0x0000080000 /* output relocation against bss */
500 502 /* section */
501 503 #define FLG_OF1_TLSOREL 0x0000100000 /* output relocation against .tlsbss */
502 504 /* section */
503 505 #define FLG_OF1_MEMORY 0x0000200000 /* produce a memory model */
504 506 #define FLG_OF1_NGLBDIR 0x0000400000 /* no DT_1_DIRECT flag allowed */
505 507 #define FLG_OF1_ENCDIFF 0x0000800000 /* host running linker has different */
506 508 /* byte order than output object */
507 509 #define FLG_OF1_VADDR 0x0001000000 /* a segment defines explicit vaddr */
508 510 #define FLG_OF1_EXTRACT 0x0002000000 /* archive member has been extracted */
509 511 #define FLG_OF1_RESCAN 0x0004000000 /* any archives should be rescanned */
510 512 #define FLG_OF1_IGNPRC 0x0008000000 /* ignore processing required */
511 513 #define FLG_OF1_NCSTTAB 0x0010000000 /* -znocompstrtab set */
512 514 #define FLG_OF1_DONE 0x0020000000 /* link-editor processing complete */
513 515 #define FLG_OF1_NONREG 0x0040000000 /* non-regular file specified as */
514 516 /* the output file */
515 517 #define FLG_OF1_ALNODIR 0x0080000000 /* establish NODIRECT for all */
516 518 /* exported interfaces. */
517 519 #define FLG_OF1_OVHWCAP1 0x0100000000 /* override CA_SUNW_HW_1 capabilities */
518 520 #define FLG_OF1_OVSFCAP1 0x0200000000 /* override CA_SUNW_SF_1 capabilities */
519 521 #define FLG_OF1_OVHWCAP2 0x0400000000 /* override CA_SUNW_HW_2 capabilities */
520 522 #define FLG_OF1_OVMACHCAP 0x0800000000 /* override CA_SUNW_MACH capability */
521 523 #define FLG_OF1_OVPLATCAP 0x1000000000 /* override CA_SUNW_PLAT capability */
522 524 #define FLG_OF1_OVIDCAP 0x2000000000 /* override CA_SUNW_ID capability */
523 525
524 526 /*
525 527 * Guidance flags. The flags with the FLG_OFG_NO_ prefix are used to suppress
526 528 * messages for a given category, and use the lower 28 bits of the word,
527 529 * The upper nibble is reserved for other guidance status.
528 530 */
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529 531 #define FLG_OFG_ENABLE 0x10000000 /* -z guidance option active */
530 532 #define FLG_OFG_ISSUED 0x20000000 /* -z guidance message issued */
531 533
532 534 #define FLG_OFG_NO_ALL 0x0fffffff /* disable all guidance */
533 535 #define FLG_OFG_NO_DEFS 0x00000001 /* specify all dependencies */
534 536 #define FLG_OFG_NO_DB 0x00000002 /* use direct bindings */
535 537 #define FLG_OFG_NO_LAZY 0x00000004 /* be explicit about lazyload */
536 538 #define FLG_OFG_NO_MF 0x00000008 /* use v2 mapfile syntax */
537 539 #define FLG_OFG_NO_TEXT 0x00000010 /* verify pure text segment */
538 540 #define FLG_OFG_NO_UNUSED 0x00000020 /* remove unused dependency */
541 +#define FLG_OFG_NO_KMOD 0x00000040 /* use -z type=kmod */
539 542
540 543 /*
541 544 * Test to see if a guidance should be given for a given category
542 545 * or not. _no_flag is one of the FLG_OFG_NO_xxx flags. Returns TRUE
543 546 * if the guidance should be issued, and FALSE to remain silent.
544 547 */
545 548 #define OFL_GUIDANCE(_ofl, _no_flag) (((_ofl)->ofl_guideflags & \
546 549 (FLG_OFG_ENABLE | (_no_flag))) == FLG_OFG_ENABLE)
547 550
548 551 /*
549 552 * Test to see if the output file would allow the presence of
550 553 * a .dynsym section.
551 554 */
552 555 #define OFL_ALLOW_DYNSYM(_ofl) (((_ofl)->ofl_flags & \
553 556 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == FLG_OF_DYNAMIC)
554 557
555 558 /*
556 559 * Test to see if the output file would allow the presence of
557 560 * a .SUNW_ldynsym section. The requirements are that a .dynsym
558 561 * is allowed, and -znoldynsym has not been specified. Note that
559 562 * even if the answer is True (1), we will only generate one if there
560 563 * are local symbols that require it.
561 564 */
562 565 #define OFL_ALLOW_LDYNSYM(_ofl) (((_ofl)->ofl_flags & \
563 566 (FLG_OF_DYNAMIC | FLG_OF_RELOBJ | FLG_OF_NOLDYNSYM)) == FLG_OF_DYNAMIC)
564 567
565 568 /*
566 569 * Test to see if relocation processing should be done. This is normally
567 570 * true, but can be disabled via the '-z noreloc' option. Note that
568 571 * relocatable objects are still relocated even if '-z noreloc' is present.
569 572 */
570 573 #define OFL_DO_RELOC(_ofl) (((_ofl)->ofl_flags & FLG_OF_RELOBJ) || \
571 574 !((_ofl)->ofl_dtflags_1 & DF_1_NORELOC))
572 575
573 576 /*
574 577 * Determine whether a static executable is being built.
575 578 */
576 579 #define OFL_IS_STATIC_EXEC(_ofl) (((_ofl)->ofl_flags & \
577 580 (FLG_OF_STATIC | FLG_OF_EXEC)) == (FLG_OF_STATIC | FLG_OF_EXEC))
578 581
579 582 /*
580 583 * Determine whether a static object is being built. This macro is used
581 584 * to select the appropriate string table, and symbol table that other
582 585 * sections need to reference.
583 586 */
584 587 #define OFL_IS_STATIC_OBJ(_ofl) ((_ofl)->ofl_flags & \
585 588 (FLG_OF_RELOBJ | FLG_OF_STATIC))
586 589
587 590 /*
588 591 * Macros for counting symbol table entries. These are used to size symbol
589 592 * tables and associated sections (.syminfo, SUNW_capinfo, .hash, etc.) and
590 593 * set required sh_info entries (the offset to the first global symbol).
591 594 */
592 595 #define SYMTAB_LOC_CNT(_ofl) /* local .symtab entries */ \
593 596 (2 + /* NULL and STT_FILE */ \
594 597 (_ofl)->ofl_shdrcnt + /* section symbol */ \
595 598 (_ofl)->ofl_caploclcnt + /* local capabilities */ \
596 599 (_ofl)->ofl_scopecnt + /* scoped symbols */ \
597 600 (_ofl)->ofl_locscnt) /* standard locals */
598 601 #define SYMTAB_ALL_CNT(_ofl) /* all .symtab entries */ \
599 602 (SYMTAB_LOC_CNT(_ofl) + /* .symtab locals */ \
600 603 (_ofl)->ofl_globcnt) /* standard globals */
601 604
602 605 #define DYNSYM_LOC_CNT(_ofl) /* local .dynsym entries */ \
603 606 (1 + /* NULL */ \
604 607 (_ofl)->ofl_dynshdrcnt + /* section symbols */ \
605 608 (_ofl)->ofl_caploclcnt + /* local capabilities */ \
606 609 (_ofl)->ofl_lregsymcnt) /* local register symbols */
607 610 #define DYNSYM_ALL_CNT(_ofl) /* all .dynsym entries */ \
608 611 (DYNSYM_LOC_CNT(_ofl) + /* .dynsym locals */ \
609 612 (_ofl)->ofl_globcnt) /* standard globals */
610 613
611 614 /*
612 615 * Define a move descriptor used within relocation structures.
613 616 */
614 617 typedef struct {
615 618 Move *mr_move;
616 619 Sym_desc *mr_sym;
617 620 } Mv_reloc;
618 621
619 622 /*
620 623 * Relocation (active & output) processing structure - transparent to common
621 624 * code. There can be millions of these structures in a large link, so it
622 625 * is important to keep it small. You should only add new items to Rel_desc
623 626 * if they are critical, apply to most relocations, and cannot be easily
624 627 * computed from the other information.
625 628 *
626 629 * Items that can be derived should be implemented as a function that accepts
627 630 * a Rel_desc argument, and returns the desired data. ld_reloc_sym_name() is
628 631 * an example of this.
629 632 *
630 633 * Lesser used relocation data is kept in an auxiliary block, Rel_aux,
631 634 * that is only allocated as necessary. In exchange for adding one pointer
632 635 * of overhead to Rel_desc (rel_aux), most relocations are reduced in size
633 636 * by the size of Rel_aux. This strategy relies on the data in Rel_aux
634 637 * being rarely needed --- otherwise it will backfire badly.
635 638 *
636 639 * Note that rel_raddend is primarily only of interest to RELA relocations,
637 640 * and is set to 0 for REL. However, there is an exception: If FLG_REL_NADDEND
638 641 * is set, then rel_raddend contains a replacement value for the implicit
639 642 * addend found in the relocation target.
640 643 *
641 644 * Fields should be ordered from largest to smallest, to minimize packing
642 645 * holes in the struct layout.
643 646 */
644 647 struct rel_desc {
645 648 Is_desc *rel_isdesc; /* input section reloc is against */
646 649 Sym_desc *rel_sym; /* sym relocation is against */
647 650 Rel_aux *rel_aux; /* NULL, or auxiliary data */
648 651 Xword rel_roffset; /* relocation offset */
649 652 Sxword rel_raddend; /* addend from input relocation */
650 653 Word rel_flags; /* misc. flags for relocations */
651 654 Word rel_rtype; /* relocation type */
652 655 };
653 656
654 657 /*
655 658 * Data that would be kept in Rel_desc if the size of that structure was
656 659 * not an issue. This auxiliary block is only allocated as needed,
657 660 * and must only contain rarely needed items. The goal is for the vast
658 661 * majority of Rel_desc structs to not have an auxiliary block.
659 662 *
660 663 * When a Rel_desc does not have an auxiliary block, a default value
661 664 * is assumed for each auxiliary item:
662 665 *
663 666 * - ra_osdesc:
664 667 * Output section to which relocation applies. The default
665 668 * value for this is the output section associated with the
666 669 * input section (rel_isdesc->is_osdesc), or NULL if there
667 670 * is no associated input section.
668 671 *
669 672 * - ra_usym:
670 673 * If the symbol associated with a relocation is part of a weak/strong
671 674 * pair, then ra_usym contains the strong symbol and rel_sym the weak.
672 675 * Otherwise, the default value is the same value as rel_sym.
673 676 *
674 677 * - ra_move:
675 678 * Move table data. The default value is NULL.
676 679 *
677 680 * - ra_typedata:
678 681 * ELF_R_TYPE_DATA(info). This value applies only to a small
679 682 * subset of 64-bit sparc relocations, and is otherwise 0. The
680 683 * default value is 0.
681 684 *
682 685 * If any value in Rel_aux is non-default, then an auxiliary block is
683 686 * necessary, and each field contains its actual value. If all the auxiliary
684 687 * values are default, no Rel_aux is needed, and the RELAUX_GET_xxx()
685 688 * macros below are able to supply the proper default.
686 689 *
687 690 * To set a Rel_aux value, use the ld_reloc_set_aux_XXX() functions.
688 691 * These functions are written to avoid unnecessary auxiliary allocations,
689 692 * and know the rules for each item.
690 693 */
691 694 struct rel_aux {
692 695 Os_desc *ra_osdesc; /* output section reloc is against */
693 696 Sym_desc *ra_usym; /* strong sym if this is a weak pair */
694 697 Mv_reloc *ra_move; /* move table information */
695 698 Word ra_typedata; /* ELF_R_TYPE_DATA(info) */
696 699 };
697 700
698 701 /*
699 702 * Test a given auxiliary value to determine if it has the default value
700 703 * for that item, as described above. If all the auxiliary items have
701 704 * their default values, no auxiliary place is necessary to represent them.
702 705 * If any one of them is non-default, the auxiliary block is needed.
703 706 */
704 707 #define RELAUX_ISDEFAULT_MOVE(_rdesc, _mv) (_mv == NULL)
705 708 #define RELAUX_ISDEFAULT_USYM(_rdesc, _usym) ((_rdesc)->rel_sym == _usym)
706 709 #define RELAUX_ISDEFAULT_OSDESC(_rdesc, _osdesc) \
707 710 ((((_rdesc)->rel_isdesc == NULL) && (_osdesc == NULL)) || \
708 711 ((_rdesc)->rel_isdesc && ((_rdesc)->rel_isdesc->is_osdesc == _osdesc)))
709 712 #define RELAUX_ISDEFAULT_TYPEDATA(_rdesc, _typedata) (_typedata == 0)
710 713
711 714 /*
712 715 * Retrieve the value of an auxiliary relocation item, preserving the illusion
713 716 * that every relocation descriptor has an auxiliary block attached. The
714 717 * real implementation is that an auxiliary block is only present if one or
715 718 * more auxiliary items have non-default values. These macros return the true
716 719 * value if an auxiliary block is present, and the default value for the
717 720 * item otherwise.
718 721 */
719 722 #define RELAUX_GET_MOVE(_rdesc) \
720 723 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_move : NULL)
721 724 #define RELAUX_GET_USYM(_rdesc) \
722 725 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_usym : (_rdesc)->rel_sym)
723 726 #define RELAUX_GET_OSDESC(_rdesc) \
724 727 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_osdesc : \
725 728 ((_rdesc)->rel_isdesc ? (_rdesc)->rel_isdesc->is_osdesc : NULL))
726 729 #define RELAUX_GET_TYPEDATA(_rdesc) \
727 730 ((_rdesc)->rel_aux ? (_rdesc)->rel_aux->ra_typedata : 0)
728 731
729 732 /*
730 733 * common flags used on the Rel_desc structure (defined in machrel.h).
731 734 */
732 735 #define FLG_REL_GOT 0x00000001 /* relocation against GOT */
733 736 #define FLG_REL_PLT 0x00000002 /* relocation against PLT */
734 737 #define FLG_REL_BSS 0x00000004 /* relocation against BSS */
735 738 #define FLG_REL_LOAD 0x00000008 /* section loadable */
736 739 #define FLG_REL_SCNNDX 0x00000010 /* use section index for symbol ndx */
737 740 #define FLG_REL_CLVAL 0x00000020 /* clear VALUE for active relocation */
738 741 #define FLG_REL_ADVAL 0x00000040 /* add VALUE for output relocation, */
739 742 /* only relevant to SPARC and */
740 743 /* R_SPARC_RELATIVE */
741 744 #define FLG_REL_GOTCL 0x00000080 /* clear the GOT entry. This is */
742 745 /* relevant to RELA relocations, */
743 746 /* not REL (i386) relocations */
744 747 #define FLG_REL_MOVETAB 0x00000100 /* Relocation against .SUNW_move */
745 748 /* adjustments required before */
746 749 /* actual relocation */
747 750 #define FLG_REL_NOINFO 0x00000200 /* Relocation comes from a section */
748 751 /* with a null sh_info field */
749 752 #define FLG_REL_REG 0x00000400 /* Relocation target is reg sym */
750 753 #define FLG_REL_FPTR 0x00000800 /* relocation against func. desc. */
751 754 #define FLG_REL_RFPTR1 0x00001000 /* Relative relocation against */
752 755 /* 1st part of FD */
753 756 #define FLG_REL_RFPTR2 0x00002000 /* Relative relocation against */
754 757 /* 2nd part of FD */
755 758 #define FLG_REL_DISP 0x00004000 /* *disp* relocation */
756 759 #define FLG_REL_STLS 0x00008000 /* IE TLS reference to */
757 760 /* static TLS GOT index */
758 761 #define FLG_REL_DTLS 0x00010000 /* GD TLS reference relative to */
759 762 /* dynamic TLS GOT index */
760 763 #define FLG_REL_MTLS 0x00020000 /* LD TLS reference against GOT */
761 764 #define FLG_REL_STTLS 0x00040000 /* LE TLS reference directly */
762 765 /* to static tls index */
763 766 #define FLG_REL_TLSFIX 0x00080000 /* relocation points to TLS instr. */
764 767 /* which needs updating */
765 768 #define FLG_REL_RELA 0x00100000 /* descriptor captures a Rela */
766 769 #define FLG_REL_GOTFIX 0x00200000 /* relocation points to GOTOP instr. */
767 770 /* which needs updating */
768 771 #define FLG_REL_NADDEND 0x00400000 /* Replace implicit addend in dest */
769 772 /* with value in rel_raddend */
770 773 /* Relevant to REL (i386) */
771 774 /* relocations, not to RELA. */
772 775
773 776 /*
774 777 * We often need the name of the symbol contained in a relocation descriptor
775 778 * for diagnostic or error output. This is usually the symbol name, but
776 779 * we substitute a constructed name in some cases. Hence, the name is
777 780 * generated on the fly by a private function within libld. This is the
778 781 * prototype for that function.
779 782 */
780 783 typedef const char *(* rel_desc_sname_func_t)(Rel_desc *);
781 784
782 785 /*
783 786 * Header for a relocation descriptor cache buffer.
784 787 */
785 788 struct rel_cachebuf {
786 789 Rel_desc *rc_end;
787 790 Rel_desc *rc_free;
788 791 Rel_desc rc_arr[1];
789 792 };
790 793
791 794 /*
792 795 * Header for a relocation auxiliary descriptor cache buffer.
793 796 */
794 797 struct rel_aux_cachebuf {
795 798 Rel_aux *rac_end;
796 799 Rel_aux *rac_free;
797 800 Rel_aux rac_arr[1];
798 801 };
799 802
800 803 /*
801 804 * Convenience macro for traversing every relocation descriptor found within
802 805 * a given relocation cache, transparently handling the cache buffers and
803 806 * skipping any unallocated descriptors within the buffers.
804 807 *
805 808 * entry:
806 809 * _rel_cache - Relocate descriptor cache (Rel_cache) to traverse
807 810 * _idx - Aliste index variable for use by the macro
808 811 * _rcbp - Cache buffer pointer, for use by the macro
809 812 * _orsp - Rel_desc pointer, which will take on the value of a different
810 813 * relocation descriptor in the cache in each iteration.
811 814 *
812 815 * The caller must not assign new values to _idx, _rcbp, or _orsp within
813 816 * the scope of REL_CACHE_TRAVERSE.
814 817 */
815 818 #define REL_CACHE_TRAVERSE(_rel_cache, _idx, _rcbp, _orsp) \
816 819 for (APLIST_TRAVERSE((_rel_cache)->rc_list, _idx, _rcbp)) \
817 820 for (_orsp = _rcbp->rc_arr; _orsp < _rcbp->rc_free; _orsp++)
818 821
819 822 /*
820 823 * Symbol value descriptor. For relocatable objects, each symbols value is
821 824 * its offset within its associated section. Therefore, to uniquely define
822 825 * each symbol within a relocatable object, record and sort the sh_offset and
823 826 * symbol value. This information is used to search for displacement
824 827 * relocations as part of copy relocation validation.
825 828 */
826 829 typedef struct {
827 830 Addr ssv_value;
828 831 Sym_desc *ssv_sdp;
829 832 } Ssv_desc;
830 833
831 834 /*
832 835 * Input file processing structures.
833 836 */
834 837 struct ifl_desc { /* input file descriptor */
835 838 const char *ifl_name; /* full file name */
836 839 const char *ifl_soname; /* shared object name */
837 840 dev_t ifl_stdev; /* device id and inode number for .so */
838 841 ino_t ifl_stino; /* multiple inclusion checks */
839 842 Ehdr *ifl_ehdr; /* elf header describing this file */
840 843 Elf *ifl_elf; /* elf descriptor for this file */
841 844 Sym_desc **ifl_oldndx; /* original symbol table indices */
842 845 Sym_desc *ifl_locs; /* symbol desc version of locals */
843 846 Ssv_desc *ifl_sortsyms; /* sorted list of symbols by value */
844 847 Word ifl_locscnt; /* no. of local symbols to process */
845 848 Word ifl_symscnt; /* total no. of symbols to process */
846 849 Word ifl_sortcnt; /* no. of sorted symbols to process */
847 850 Word ifl_shnum; /* number of sections in file */
848 851 Word ifl_shstrndx; /* index to .shstrtab */
849 852 Word ifl_vercnt; /* number of versions in file */
850 853 Half ifl_neededndx; /* index to NEEDED in .dyn section */
851 854 Word ifl_flags; /* explicit/implicit reference */
852 855 Is_desc **ifl_isdesc; /* isdesc[scn ndx] = Is_desc ptr */
853 856 Sdf_desc *ifl_sdfdesc; /* control definition */
854 857 Versym *ifl_versym; /* version symbol table array */
855 858 Ver_index *ifl_verndx; /* verndx[ver ndx] = Ver_index */
856 859 APlist *ifl_verdesc; /* version descriptor list */
857 860 APlist *ifl_relsect; /* relocation section list */
858 861 Alist *ifl_groups; /* SHT_GROUP section list */
859 862 Cap_desc *ifl_caps; /* capabilities descriptor */
860 863 };
861 864
862 865 #define FLG_IF_CMDLINE 0x00000001 /* full filename specified from the */
863 866 /* command line (no -l) */
864 867 #define FLG_IF_NEEDED 0x00000002 /* shared object should be recorded */
865 868 #define FLG_IF_DIRECT 0x00000004 /* establish direct bindings to this */
866 869 /* object */
867 870 #define FLG_IF_EXTRACT 0x00000008 /* file extracted from an archive */
868 871 #define FLG_IF_VERNEED 0x00000010 /* version dependency information is */
869 872 /* required */
870 873 #define FLG_IF_DEPREQD 0x00000020 /* dependency is required to satisfy */
871 874 /* symbol references */
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872 875 #define FLG_IF_NEEDSTR 0x00000040 /* dependency specified by -Nn */
873 876 /* flag */
874 877 #define FLG_IF_IGNORE 0x00000080 /* ignore unused dependencies */
875 878 #define FLG_IF_NODIRECT 0x00000100 /* object contains symbols that */
876 879 /* cannot be directly bound to */
877 880 #define FLG_IF_LAZYLD 0x00000200 /* dependency should be lazy loaded */
878 881 #define FLG_IF_GRPPRM 0x00000400 /* dependency establishes a group */
879 882 #define FLG_IF_DISPPEND 0x00000800 /* displacement relocation done */
880 883 /* in the ld time. */
881 884 #define FLG_IF_DISPDONE 0x00001000 /* displacement relocation done */
882 - /* at the run time */
885 + /* at the run time */
883 886 #define FLG_IF_MAPFILE 0x00002000 /* file is a mapfile */
884 887 #define FLG_IF_HSTRTAB 0x00004000 /* file has a string section */
885 888 #define FLG_IF_FILEREF 0x00008000 /* file contains a section which */
886 889 /* is included in the output */
887 890 /* allocatable image */
888 891 #define FLG_IF_GNUVER 0x00010000 /* file used GNU-style versioning */
889 892 #define FLG_IF_ORDERED 0x00020000 /* ordered section processing */
890 893 /* required */
891 894 #define FLG_IF_OTOSCAP 0x00040000 /* convert object capabilities to */
892 895 /* symbol capabilities */
893 896 #define FLG_IF_DEFERRED 0x00080000 /* dependency is deferred */
894 897 #define FLG_IF_RTLDINF 0x00100000 /* dependency has DT_SUNW_RTLTINF set */
895 898 #define FLG_IF_GROUPS 0x00200000 /* input file has groups to process */
896 899
897 900 /*
898 901 * Symbol states that require the generation of a DT_POSFLAG_1 .dynamic entry.
899 902 */
900 903 #define MSK_IF_POSFLAG1 (FLG_IF_LAZYLD | FLG_IF_GRPPRM | FLG_IF_DEFERRED)
901 904
902 905 /*
903 906 * Symbol states that require an associated Syminfo entry.
904 907 */
905 908 #define MSK_IF_SYMINFO (FLG_IF_LAZYLD | FLG_IF_DIRECT | FLG_IF_DEFERRED)
906 909
907 910
908 911 struct is_desc { /* input section descriptor */
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909 912 const char *is_name; /* original section name */
910 913 const char *is_sym_name; /* NULL, or name string to use for */
911 914 /* related STT_SECTION symbols */
912 915 Shdr *is_shdr; /* the elf section header */
913 916 Ifl_desc *is_file; /* infile desc for this section */
914 917 Os_desc *is_osdesc; /* new output section for this */
915 918 /* input section */
916 919 Elf_Data *is_indata; /* input sections raw data */
917 920 Is_desc *is_symshndx; /* related SHT_SYM_SHNDX section */
918 921 Is_desc *is_comdatkeep; /* If COMDAT section is discarded, */
919 - /* this is section that was kept */
922 + /* this is section that was kept */
920 923 Word is_scnndx; /* original section index in file */
921 924 Word is_ordndx; /* index for section. Used to decide */
922 925 /* where to insert section when */
923 - /* reordering sections */
926 + /* reordering sections */
924 927 Word is_keyident; /* key for SHF_{ORDERED|LINK_ORDER} */
925 928 /* processing and ident used for */
926 929 /* placing/ordering sections */
927 930 Word is_flags; /* Various flags */
928 931 };
929 932
930 933 #define FLG_IS_ORDERED 0x0001 /* this is a SHF_ORDERED section */
931 934 #define FLG_IS_KEY 0x0002 /* section requires sort keys */
932 935 #define FLG_IS_DISCARD 0x0004 /* section is to be discarded */
933 936 #define FLG_IS_RELUPD 0x0008 /* symbol defined here may have moved */
934 937 #define FLG_IS_SECTREF 0x0010 /* section has been referenced */
935 938 #define FLG_IS_GDATADEF 0x0020 /* section contains global data sym */
936 939 #define FLG_IS_EXTERNAL 0x0040 /* isp from a user file */
937 940 #define FLG_IS_INSTRMRG 0x0080 /* Usable SHF_MERGE|SHF_STRINGS sec */
938 941 #define FLG_IS_GNSTRMRG 0x0100 /* Generated mergeable string section */
939 942
940 943 #define FLG_IS_PLACE 0x0400 /* section requires to be placed */
941 944 #define FLG_IS_COMDAT 0x0800 /* section is COMDAT */
942 945 #define FLG_IS_EHFRAME 0x1000 /* section is .eh_frame */
943 946
944 947 /*
945 948 * Output sections contain lists of input sections that are assigned to them.
946 949 * These items fall into 4 categories:
947 950 * BEFORE - Ordered sections that specify SHN_BEFORE, in input order.
948 951 * ORDERED - Ordered sections that are sorted using unsorted sections
949 952 * as the sort key.
950 953 * DEFAULT - Sections that are placed into the output section
951 954 * in input order.
952 955 * AFTER - Ordered sections that specify SHN_AFTER, in input order.
953 956 */
954 957 #define OS_ISD_BEFORE 0
955 958 #define OS_ISD_ORDERED 1
956 959 #define OS_ISD_DEFAULT 2
957 960 #define OS_ISD_AFTER 3
958 961 #define OS_ISD_NUM 4
959 962 typedef APlist *os_isdecs_arr[OS_ISD_NUM];
960 963
961 964 /*
962 965 * Convenience macro for traversing every input section associated
963 966 * with a given output section. The primary benefit of this macro
964 967 * is that it preserves a precious level of code indentation in the
965 968 * code that uses it.
966 969 */
967 970 #define OS_ISDESCS_TRAVERSE(_list_idx, _osp, _idx, _isp) \
968 971 for (_list_idx = 0; _list_idx < OS_ISD_NUM; _list_idx++) \
969 972 for (APLIST_TRAVERSE(_osp->os_isdescs[_list_idx], _idx, _isp))
970 973
971 974
972 975 /*
973 976 * Map file and output file processing structures
974 977 */
975 978 struct os_desc { /* Output section descriptor */
976 979 const char *os_name; /* the section name */
977 980 Elf_Scn *os_scn; /* the elf section descriptor */
978 981 Shdr *os_shdr; /* the elf section header */
979 982 Os_desc *os_relosdesc; /* the output relocation section */
980 983 APlist *os_relisdescs; /* reloc input section descriptors */
981 984 /* for this output section */
982 985 os_isdecs_arr os_isdescs; /* lists of input sections in output */
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983 986 APlist *os_mstrisdescs; /* FLG_IS_INSTRMRG input sections */
984 987 Sg_desc *os_sgdesc; /* segment os_desc is placed on */
985 988 Elf_Data *os_outdata; /* output sections raw data */
986 989 avl_tree_t *os_comdats; /* AVL tree of COMDAT input sections */
987 990 /* associated to output section */
988 991 Word os_identndx; /* section identifier for input */
989 992 /* section processing, followed */
990 993 /* by section symbol index */
991 994 Word os_ordndx; /* index for section. Used to decide */
992 995 /* where to insert section when */
993 - /* reordering sections */
996 + /* reordering sections */
994 997 Xword os_szoutrels; /* size of output relocation section */
995 998 uint_t os_namehash; /* hash on section name */
996 999 uchar_t os_flags; /* various flags */
997 1000 };
998 1001
999 1002 #define FLG_OS_KEY 0x01 /* section requires sort keys */
1000 1003 #define FLG_OS_OUTREL 0x02 /* output rel against this section */
1001 1004 #define FLG_OS_SECTREF 0x04 /* isps are not affected by -zignore */
1002 1005 #define FLG_OS_EHFRAME 0x08 /* section is .eh_frame */
1003 1006
1004 1007 /*
1005 1008 * The sg_id field of the segment descriptor is used to establish the default
1006 1009 * order for program headers and segments in the output object. Segments are
1007 1010 * ordered according to the following SGID values that classify them based on
1008 1011 * their attributes. The initial set of built in segments are in this order,
1009 1012 * and new mapfile defined segments are inserted into these groups. Within a
1010 1013 * given SGID group, the position of new segments depends on the syntax
1011 1014 * version of the mapfile that creates them. Version 1 (original sysv)
1012 1015 * mapfiles place the new segment at the head of their group (reverse creation
1013 1016 * order). The newer syntax places them at the end, following the others
1014 1017 * (creation order).
1015 1018 *
1016 1019 * Note that any new segments must always be added after PT_PHDR and
1017 1020 * PT_INTERP (refer Generic ABI, Page 5-4).
1018 1021 */
1019 1022 #define SGID_PHDR 0 /* PT_PHDR */
1020 1023 #define SGID_INTERP 1 /* PT_INTERP */
1021 1024 #define SGID_SUNWCAP 2 /* PT_SUNWCAP */
1022 1025 #define SGID_TEXT 3 /* PT_LOAD */
1023 1026 #define SGID_DATA 4 /* PT_LOAD */
1024 1027 #define SGID_BSS 5 /* PT_LOAD */
1025 1028 #if defined(_ELF64)
1026 1029 #define SGID_LRODATA 6 /* PT_LOAD (amd64-only) */
1027 1030 #define SGID_LDATA 7 /* PT_LOAD (amd64-only) */
1028 1031 #endif
1029 1032 #define SGID_TEXT_EMPTY 8 /* PT_LOAD, reserved (?E in version 1 syntax) */
1030 1033 #define SGID_NULL_EMPTY 9 /* PT_NULL, reserved (?E in version 1 syntax) */
1031 1034 #define SGID_DYN 10 /* PT_DYNAMIC */
1032 1035 #define SGID_DTRACE 11 /* PT_SUNWDTRACE */
1033 1036 #define SGID_TLS 12 /* PT_TLS */
1034 1037 #define SGID_UNWIND 13 /* PT_SUNW_UNWIND */
1035 1038 #define SGID_SUNWSTACK 14 /* PT_SUNWSTACK */
1036 1039 #define SGID_NOTE 15 /* PT_NOTE */
1037 1040 #define SGID_NULL 16 /* PT_NULL, mapfile defined empty phdr slots */
1038 1041 /* for use by post processors */
1039 1042 #define SGID_EXTRA 17 /* PT_NULL (final catchall) */
1040 1043
1041 1044 typedef Half sg_flags_t;
1042 1045 struct sg_desc { /* output segment descriptor */
1043 1046 Word sg_id; /* segment identifier (for sorting) */
1044 1047 Phdr sg_phdr; /* segment header for output file */
1045 1048 const char *sg_name; /* segment name for PT_LOAD, PT_NOTE, */
1046 1049 /* and PT_NULL, otherwise NULL */
1047 1050 Xword sg_round; /* data rounding required (mapfile) */
1048 1051 Xword sg_length; /* maximum segment length; if 0 */
1049 1052 /* segment is not specified */
1050 1053 APlist *sg_osdescs; /* list of output section descriptors */
1051 1054 APlist *sg_is_order; /* list of entry criteria */
1052 1055 /* giving input section order */
1053 1056 Alist *sg_os_order; /* list specifying output section */
1054 1057 /* ordering for the segment */
1055 1058 sg_flags_t sg_flags;
1056 1059 APlist *sg_sizesym; /* size symbols for this segment */
1057 1060 Xword sg_align; /* LCM of sh_addralign */
1058 1061 Elf_Scn *sg_fscn; /* the SCN of the first section. */
1059 1062 avl_node_t sg_avlnode; /* AVL book-keeping */
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1060 1063 };
1061 1064
1062 1065 #define FLG_SG_P_VADDR 0x0001 /* p_vaddr segment attribute set */
1063 1066 #define FLG_SG_P_PADDR 0x0002 /* p_paddr segment attribute set */
1064 1067 #define FLG_SG_LENGTH 0x0004 /* length segment attribute set */
1065 1068 #define FLG_SG_P_ALIGN 0x0008 /* p_align segment attribute set */
1066 1069 #define FLG_SG_ROUND 0x0010 /* round segment attribute set */
1067 1070 #define FLG_SG_P_FLAGS 0x0020 /* p_flags segment attribute set */
1068 1071 #define FLG_SG_P_TYPE 0x0040 /* p_type segment attribute set */
1069 1072 #define FLG_SG_IS_ORDER 0x0080 /* input section ordering is required */
1070 - /* for this segment. */
1073 + /* for this segment. */
1071 1074 #define FLG_SG_NOHDR 0x0100 /* don't map ELF or phdrs into */
1072 1075 /* this segment */
1073 1076 #define FLG_SG_EMPTY 0x0200 /* an empty segment specification */
1074 1077 /* no input sections will be */
1075 1078 /* associated to this section */
1076 1079 #define FLG_SG_KEY 0x0400 /* segment requires sort keys */
1077 1080 #define FLG_SG_NODISABLE 0x0800 /* FLG_SG_DISABLED is not allowed on */
1078 1081 /* this segment */
1079 1082 #define FLG_SG_DISABLED 0x1000 /* this segment is disabled */
1080 1083 #define FLG_SG_PHREQ 0x2000 /* this segment requires a program */
1081 1084 /* header */
1082 1085 #define FLG_SG_ORDERED 0x4000 /* SEGMENT_ORDER segment */
1083 1086
1084 1087 struct sec_order {
1085 1088 const char *sco_secname; /* section name to be ordered */
1086 1089 Half sco_flags;
1087 1090 };
1088 1091
1089 1092 #define FLG_SGO_USED 0x0001 /* was ordering used? */
1090 1093
1091 1094 typedef Half ec_flags_t;
1092 1095 struct ent_desc { /* input section entrance criteria */
1093 1096 const char *ec_name; /* entrace criteria name, or NULL */
1094 1097 Alist *ec_files; /* files from which to accept */
1095 1098 /* sections */
1096 1099 const char *ec_is_name; /* input section name to match */
1097 1100 /* (NULL if none) */
1098 1101 Word ec_type; /* section type */
1099 1102 Word ec_attrmask; /* section attribute mask (AWX) */
1100 1103 Word ec_attrbits; /* sections attribute bits */
1101 1104 Sg_desc *ec_segment; /* output segment to enter if matched */
1102 1105 Word ec_ordndx; /* index to determine where section */
1103 1106 /* meeting this criteria should */
1104 1107 /* inserted. Used for reordering */
1105 1108 /* of sections. */
1106 1109 ec_flags_t ec_flags;
1107 1110 avl_node_t ec_avlnode; /* AVL book-keeping */
1108 1111 };
1109 1112
1110 1113 #define FLG_EC_BUILTIN 0x0001 /* built in descriptor */
1111 1114 #define FLG_EC_USED 0x0002 /* entrance criteria met? */
1112 1115 #define FLG_EC_CATCHALL 0x0004 /* Catches any section */
1113 1116
1114 1117 /*
1115 1118 * Ent_desc_file is the type of element maintained in the ec_files Alist
1116 1119 * of an entrance criteria descriptor. Each item maintains one file
1117 1120 * path, and a set of flags that specify the type of comparison it implies,
1118 1121 * and other information about it. The comparison type is maintained in
1119 1122 * the bottom byte of the flags.
1120 1123 */
1121 1124 #define TYP_ECF_MASK 0x00ff /* Comparison type mask */
1122 1125 #define TYP_ECF_PATH 0 /* Compare to file path */
1123 1126 #define TYP_ECF_BASENAME 1 /* Compare to file basename */
1124 1127 #define TYP_ECF_OBJNAME 2 /* Compare to regular file basename, */
1125 1128 /* or to archive member name */
1126 1129 #define TYP_ECF_NUM 3
1127 1130
1128 1131 #define FLG_ECF_ARMEMBER 0x0100 /* name includes archive member */
1129 1132
1130 1133 typedef struct {
1131 1134 Word edf_flags; /* Type of comparison */
1132 1135 const char *edf_name; /* String to compare to */
1133 1136 size_t edf_name_len; /* strlen(edf_name) */
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1134 1137 } Ent_desc_file;
1135 1138
1136 1139 /*
1137 1140 * One structure is allocated for a move entry, and associated to the symbol
1138 1141 * against which a move is targeted.
1139 1142 */
1140 1143 typedef struct {
1141 1144 Move *md_move; /* original Move entry */
1142 1145 Xword md_start; /* start position */
1143 1146 Xword md_len; /* length of initialization */
1144 - Word md_oidx; /* output Move entry index */
1147 + Word md_oidx; /* output Move entry index */
1145 1148 } Mv_desc;
1146 1149
1147 1150 /*
1148 1151 * Symbol descriptor.
1149 1152 */
1150 1153 typedef Lword sd_flag_t;
1151 1154 struct sym_desc {
1152 1155 Alist *sd_GOTndxs; /* list of associated GOT entries */
1153 1156 Sym *sd_sym; /* pointer to symbol table entry */
1154 1157 Sym *sd_osym; /* copy of the original symbol entry */
1155 1158 /* used only for local partial */
1156 1159 Alist *sd_move; /* move information associated with a */
1157 1160 /* partially initialized symbol */
1158 1161 const char *sd_name; /* symbols name */
1159 1162 Ifl_desc *sd_file; /* file where symbol is taken */
1160 1163 Is_desc *sd_isc; /* input section of symbol definition */
1161 1164 Sym_aux *sd_aux; /* auxiliary global symbol info. */
1162 1165 Word sd_symndx; /* index in output symbol table */
1163 1166 Word sd_shndx; /* sect. index sym is associated w/ */
1164 1167 sd_flag_t sd_flags; /* state flags */
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1165 1168 Half sd_ref; /* reference definition of symbol */
1166 1169 };
1167 1170
1168 1171 /*
1169 1172 * The auxiliary symbol descriptor contains the additional information (beyond
1170 1173 * the symbol descriptor) required to process global symbols. These symbols are
1171 1174 * accessed via an internal symbol hash table where locality of reference is
1172 1175 * important for performance.
1173 1176 */
1174 1177 struct sym_aux {
1175 - APlist *sa_dfiles; /* files where symbol is defined */
1178 + APlist *sa_dfiles; /* files where symbol is defined */
1176 1179 Sym sa_sym; /* copy of symtab entry */
1177 1180 const char *sa_vfile; /* first unavailable definition */
1178 1181 const char *sa_rfile; /* file with first symbol referenced */
1179 1182 Word sa_hash; /* the pure hash value of symbol */
1180 1183 Word sa_PLTndx; /* index into PLT for symbol */
1181 1184 Word sa_PLTGOTndx; /* GOT entry indx for PLT indirection */
1182 1185 Word sa_linkndx; /* index of associated symbol from */
1183 1186 /* ET_DYN file */
1184 1187 Half sa_symspec; /* special symbol ids */
1185 1188 Half sa_overndx; /* output file versioning index */
1186 1189 Half sa_dverndx; /* dependency versioning index */
1190 + Os_desc *sa_boundsec; /* output section of SECBOUND_ syms */
1187 1191 };
1188 1192
1189 1193 /*
1190 1194 * Nodes used to track symbols in the global AVL symbol dictionary.
1191 1195 */
1192 1196 struct sym_avlnode {
1193 1197 avl_node_t sav_node; /* AVL node */
1194 1198 Word sav_hash; /* symbol hash value */
1195 1199 const char *sav_name; /* symbol name */
1196 1200 Sym_desc *sav_sdp; /* symbol descriptor */
1197 1201 };
1198 1202
1199 1203 /*
1200 1204 * These are the ids for processing of `Special symbols'. They are used
1201 1205 * to set the sym->sd_aux->sa_symspec field.
1202 1206 */
1203 -#define SDAUX_ID_ETEXT 1 /* etext && _etext symbol */
1204 -#define SDAUX_ID_EDATA 2 /* edata && _edata symbol */
1205 -#define SDAUX_ID_END 3 /* end, _end, && _END_ symbol */
1206 -#define SDAUX_ID_DYN 4 /* DYNAMIC && _DYNAMIC symbol */
1207 -#define SDAUX_ID_PLT 5 /* _PROCEDURE_LINKAGE_TABLE_ symbol */
1208 -#define SDAUX_ID_GOT 6 /* _GLOBAL_OFFSET_TABLE_ symbol */
1209 -#define SDAUX_ID_START 7 /* START_ && _START_ symbol */
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 */
1210 1216
1211 1217 /*
1212 1218 * Flags for sym_desc.sd_flags
1213 1219 */
1214 1220 #define FLG_SY_MVTOCOMM 0x00000001 /* assign symbol to common (.bss) */
1215 1221 /* this is a result of a */
1216 1222 /* copy reloc against sym */
1217 1223 #define FLG_SY_GLOBREF 0x00000002 /* a global reference has been seen */
1218 1224 #define FLG_SY_WEAKDEF 0x00000004 /* a weak definition has been used */
1219 1225 #define FLG_SY_CLEAN 0x00000008 /* `Sym' entry points to original */
1220 1226 /* input file (read-only). */
1221 1227 #define FLG_SY_UPREQD 0x00000010 /* symbol value update is required, */
1222 1228 /* either it's used as an entry */
1223 1229 /* point or for relocation, but */
1224 1230 /* it must be updated even if */
1225 1231 /* the -s flag is in effect */
1226 1232 #define FLG_SY_NOTAVAIL 0x00000020 /* symbol is not available to the */
1227 1233 /* application either because it */
1228 1234 /* originates from an implicitly */
1229 - /* referenced shared object, or */
1235 + /* referenced shared object, or */
1230 1236 /* because it is not part of a */
1231 1237 /* specified version. */
1232 1238 #define FLG_SY_REDUCED 0x00000040 /* a global is reduced to local */
1233 1239 #define FLG_SY_VERSPROM 0x00000080 /* version definition has been */
1234 1240 /* promoted to output file */
1235 1241 #define FLG_SY_PROT 0x00000100 /* stv_protected visibility seen */
1236 1242 #define FLG_SY_MAPREF 0x00000200 /* symbol reference generated by user */
1237 1243 /* from mapfile */
1238 1244 #define FLG_SY_REFRSD 0x00000400 /* symbols sd_ref has been raised */
1239 - /* due to a copy-relocs */
1245 + /* due to a copy-relocs */
1240 1246 /* weak-strong pairing */
1241 1247 #define FLG_SY_INTPOSE 0x00000800 /* symbol defines an interposer */
1242 1248 #define FLG_SY_INVALID 0x00001000 /* unwanted/erroneous symbol */
1243 1249 #define FLG_SY_SMGOT 0x00002000 /* small got index assigned to symbol */
1244 1250 /* sparc only */
1245 1251 #define FLG_SY_PARENT 0x00004000 /* symbol to be found in parent */
1246 1252 /* only used with direct bindings */
1247 1253 #define FLG_SY_LAZYLD 0x00008000 /* symbol to cause lazyloading of */
1248 1254 /* parent object */
1249 1255 #define FLG_SY_ISDISC 0x00010000 /* symbol is a member of a DISCARDED */
1250 1256 /* section (COMDAT) */
1251 1257 #define FLG_SY_PAREXPN 0x00020000 /* partially init. symbol to be */
1252 1258 /* expanded */
1253 1259 #define FLG_SY_PLTPAD 0x00040000 /* pltpadding has been allocated for */
1254 1260 /* this symbol */
1255 1261 #define FLG_SY_REGSYM 0x00080000 /* REGISTER symbol (sparc only) */
1256 1262 #define FLG_SY_SOFOUND 0x00100000 /* compared against an SO definition */
1257 1263 #define FLG_SY_EXTERN 0x00200000 /* symbol is external, allows -zdefs */
1258 1264 /* error suppression */
1259 1265 #define FLG_SY_MAPUSED 0x00400000 /* mapfile symbol used (occurred */
1260 1266 /* within a relocatable object) */
1261 1267 #define FLG_SY_COMMEXP 0x00800000 /* COMMON symbol which has been */
1262 1268 /* allocated */
1263 1269 #define FLG_SY_CMDREF 0x01000000 /* symbol was referenced from the */
1264 1270 /* command line. (ld -u <>, */
1265 1271 /* ld -zrtldinfo=<>, ...) */
1266 1272 #define FLG_SY_SPECSEC 0x02000000 /* section index is reserved value */
1267 1273 /* ABS, COMMON, ... */
1268 1274 #define FLG_SY_TENTSYM 0x04000000 /* tentative symbol */
1269 1275 #define FLG_SY_VISIBLE 0x08000000 /* symbols visibility determined */
1270 1276 #define FLG_SY_STDFLTR 0x10000000 /* symbol is a standard filter */
1271 1277 #define FLG_SY_AUXFLTR 0x20000000 /* symbol is an auxiliary filter */
1272 1278 #define FLG_SY_DYNSORT 0x40000000 /* req. in dyn[sym|tls]sort section */
1273 1279 #define FLG_SY_NODYNSORT 0x80000000 /* excluded from dyn[sym_tls]sort sec */
1274 1280
1275 1281 #define FLG_SY_DEFAULT 0x0000100000000 /* global symbol, default */
1276 1282 #define FLG_SY_SINGLE 0x0000200000000 /* global symbol, singleton defined */
1277 1283 #define FLG_SY_PROTECT 0x0000400000000 /* global symbol, protected defined */
1278 1284 #define FLG_SY_EXPORT 0x0000800000000 /* global symbol, exported defined */
1279 1285
1280 1286 #define MSK_SY_GLOBAL \
1281 1287 (FLG_SY_DEFAULT | FLG_SY_SINGLE | FLG_SY_PROTECT | FLG_SY_EXPORT)
1282 1288 /* this mask indicates that the */
1283 1289 /* symbol has been explicitly */
1284 1290 /* defined within a mapfile */
1285 1291 /* definition, and is a candidate */
1286 1292 /* for versioning */
1287 1293
1288 1294 #define FLG_SY_HIDDEN 0x0001000000000 /* global symbol, reduce to local */
1289 1295 #define FLG_SY_ELIM 0x0002000000000 /* global symbol, eliminate */
1290 1296 #define FLG_SY_IGNORE 0x0004000000000 /* global symbol, ignored */
1291 1297
1292 1298 #define MSK_SY_LOCAL (FLG_SY_HIDDEN | FLG_SY_ELIM | FLG_SY_IGNORE)
1293 1299 /* this mask allows all local state */
1294 1300 /* flags to be removed when the */
1295 1301 /* symbol is copy relocated */
1296 1302
1297 1303 #define FLG_SY_EXPDEF 0x0008000000000 /* symbol visibility defined */
1298 1304 /* explicitly */
1299 1305
1300 1306 #define MSK_SY_NOAUTO (FLG_SY_SINGLE | FLG_SY_EXPORT | FLG_SY_EXPDEF)
1301 1307 /* this mask indicates that the */
1302 1308 /* symbol is not a candidate for */
1303 1309 /* auto-reduction/elimination */
1304 1310
1305 1311 #define FLG_SY_MAPFILE 0x0010000000000 /* symbol attribute defined in a */
1306 1312 /* mapfile */
1307 1313 #define FLG_SY_DIR 0x0020000000000 /* global symbol, direct bindings */
1308 1314 #define FLG_SY_NDIR 0x0040000000000 /* global symbol, nondirect bindings */
1309 1315 #define FLG_SY_OVERLAP 0x0080000000000 /* move entry overlap detected */
1310 1316 #define FLG_SY_CAP 0x0100000000000 /* symbol is associated with */
1311 1317 /* capabilities */
1312 1318 #define FLG_SY_DEFERRED 0x0200000000000 /* symbol should not be bound to */
1313 1319 /* during BIND_NOW relocations */
1314 1320
1315 1321 /*
1316 1322 * A symbol can only be truly hidden if it is not a capabilities symbol.
1317 1323 */
1318 1324 #define SYM_IS_HIDDEN(_sdp) \
1319 1325 (((_sdp)->sd_flags & (FLG_SY_HIDDEN | FLG_SY_CAP)) == FLG_SY_HIDDEN)
1320 1326
1321 1327 /*
1322 1328 * Create a mask for (sym.st_other & visibility) since the gABI does not yet
1323 1329 * define a ELF*_ST_OTHER macro.
1324 1330 */
1325 1331 #define MSK_SYM_VISIBILITY 0x7
1326 1332
1327 1333 /*
1328 1334 * Structure to manage the shared object definition lists. There are two lists
1329 1335 * that use this structure:
1330 1336 *
1331 1337 * - ofl_soneed; maintain the list of implicitly required dependencies
1332 1338 * (ie. shared objects needed by other shared objects). These definitions
1333 1339 * may include RPATH's required to locate the dependencies, and any
1334 1340 * version requirements.
1335 1341 *
1336 1342 * - ofl_socntl; maintains the shared object control definitions. These are
1337 1343 * provided by the user (via a mapfile) and are used to indicate any
1338 1344 * version control requirements.
1339 1345 */
1340 1346 struct sdf_desc {
1341 1347 const char *sdf_name; /* the shared objects file name */
1342 1348 char *sdf_rpath; /* library search path DT_RPATH */
1343 1349 const char *sdf_rfile; /* referencing file for diagnostics */
1344 1350 Ifl_desc *sdf_file; /* the final input file descriptor */
1345 1351 Alist *sdf_vers; /* list of versions that are required */
1346 1352 /* from this object */
1347 1353 Alist *sdf_verneed; /* list of VERNEEDS to create for */
1348 1354 /* object via mapfile ADDVERS */
1349 1355 Word sdf_flags;
1350 1356 };
1351 1357
1352 1358 #define FLG_SDF_SELECT 0x01 /* version control selection required */
1353 1359 #define FLG_SDF_VERIFY 0x02 /* version definition verification */
1354 1360 /* required */
1355 1361 #define FLG_SDF_ADDVER 0x04 /* add VERNEED references */
1356 1362
1357 1363 /*
1358 1364 * Structure to manage shared object version usage requirements.
1359 1365 */
1360 1366 struct sdv_desc {
1361 1367 const char *sdv_name; /* version name */
1362 1368 const char *sdv_ref; /* versions reference */
1363 1369 Word sdv_flags; /* flags */
1364 1370 };
1365 1371
1366 1372 #define FLG_SDV_MATCHED 0x01 /* VERDEF found and matched */
1367 1373
1368 1374 /*
1369 1375 * Structures to manage versioning information. Two versioning structures are
1370 1376 * defined:
1371 1377 *
1372 1378 * - a version descriptor maintains a linked list of versions and their
1373 1379 * associated dependencies. This is used to build the version definitions
1374 1380 * for an image being created (see map_symbol), and to determine the
1375 1381 * version dependency graph for any input files that are versioned.
1376 1382 *
1377 1383 * - a version index array contains each version of an input file that is
1378 1384 * being processed. It informs us which versions are available for
1379 1385 * binding, and is used to generate any version dependency information.
1380 1386 */
1381 1387 struct ver_desc {
1382 1388 const char *vd_name; /* version name */
1383 1389 Ifl_desc *vd_file; /* file that defined version */
1384 1390 Word vd_hash; /* hash value of name */
1385 1391 Half vd_ndx; /* coordinates with symbol index */
1386 1392 Half vd_flags; /* version information */
1387 1393 APlist *vd_deps; /* version dependencies */
1388 1394 Ver_desc *vd_ref; /* dependency's first reference */
1389 1395 };
1390 1396
1391 1397 struct ver_index {
1392 1398 const char *vi_name; /* dependency version name */
1393 1399 Half vi_flags; /* communicates availability */
1394 1400 Half vi_overndx; /* index assigned to this version in */
1395 1401 /* output object Verneed section */
1396 1402 Ver_desc *vi_desc; /* cross reference to descriptor */
1397 1403 };
1398 1404
1399 1405 /*
1400 1406 * Define any internal version descriptor flags ([vd|vi]_flags). Note that the
1401 1407 * first byte is reserved for user visible flags (refer VER_FLG's in link.h).
1402 1408 */
1403 1409 #define MSK_VER_USER 0x0f /* mask for user visible flags */
1404 1410
1405 1411 #define FLG_VER_AVAIL 0x10 /* version is available for binding */
1406 1412 #define FLG_VER_REFER 0x20 /* version has been referenced */
1407 1413 #define FLG_VER_CYCLIC 0x40 /* a member of cyclic dependency */
1408 1414
1409 1415 /*
1410 1416 * isalist(1) descriptor - used to break an isalist string into its component
1411 1417 * options.
1412 1418 */
1413 1419 struct isa_opt {
1414 1420 char *isa_name; /* individual isa option name */
1415 1421 size_t isa_namesz; /* and associated size */
1416 1422 };
1417 1423
1418 1424 struct isa_desc {
1419 1425 char *isa_list; /* sysinfo(SI_ISALIST) list */
1420 1426 size_t isa_listsz; /* and associated size */
1421 1427 Isa_opt *isa_opt; /* table of individual isa options */
1422 1428 size_t isa_optno; /* and associated number */
1423 1429 };
1424 1430
1425 1431 /*
1426 1432 * uname(2) descriptor - used to break a utsname structure into its component
1427 1433 * options (at least those that we're interested in).
1428 1434 */
1429 1435 struct uts_desc {
1430 1436 char *uts_osname; /* operating system name */
1431 1437 size_t uts_osnamesz; /* and associated size */
1432 1438 char *uts_osrel; /* operating system release */
1433 1439 size_t uts_osrelsz; /* and associated size */
1434 1440 };
1435 1441
1436 1442 /*
1437 1443 * SHT_GROUP descriptor - used to track group sections at the global
1438 1444 * level to resolve conflicts and determine which to keep.
1439 1445 */
1440 1446 struct group_desc {
1441 1447 Is_desc *gd_isc; /* input section descriptor */
1442 1448 Is_desc *gd_oisc; /* overriding input section */
1443 1449 /* descriptor when discarded */
1444 1450 const char *gd_name; /* group name (signature symbol) */
1445 1451 Word *gd_data; /* data for group section */
1446 1452 size_t gd_cnt; /* number of entries in group data */
1447 1453 };
1448 1454
1449 1455 /*
1450 1456 * Indexes into the ld_support_funcs[] table.
1451 1457 */
1452 1458 typedef enum {
1453 1459 LDS_VERSION = 0, /* Must be first and have value 0 */
1454 1460 LDS_INPUT_DONE,
1455 1461 LDS_START,
1456 1462 LDS_ATEXIT,
1457 1463 LDS_OPEN,
1458 1464 LDS_FILE,
1459 1465 LDS_INSEC,
1460 1466 LDS_SEC,
1461 1467 LDS_NUM
1462 1468 } Support_ndx;
1463 1469
1464 1470 /*
1465 1471 * Structure to manage archive member caching. Each archive has an archive
1466 1472 * descriptor (Ar_desc) associated with it. This contains pointers to the
1467 1473 * archive symbol table (obtained by elf_getarsyms(3e)) and an auxiliary
1468 1474 * structure (Ar_uax[]) that parallels this symbol table. The member element
1469 1475 * of this auxiliary table indicates whether the archive member associated with
1470 1476 * the symbol offset has already been extracted (AREXTRACTED) or partially
1471 1477 * processed (refer process_member()).
1472 1478 */
1473 1479 typedef struct ar_mem {
1474 1480 Elf *am_elf; /* elf descriptor for this member */
1475 1481 const char *am_name; /* members name */
1476 1482 const char *am_path; /* path (ie. lib(foo.o)) */
1477 1483 Sym *am_syms; /* start of global symbols */
1478 1484 char *am_strs; /* associated string table start */
1479 1485 Xword am_symn; /* no. of global symbols */
1480 1486 } Ar_mem;
1481 1487
1482 1488 typedef struct ar_aux {
1483 1489 Sym_desc *au_syms; /* internal symbol descriptor */
1484 1490 Ar_mem *au_mem; /* associated member */
1485 1491 } Ar_aux;
1486 1492
1487 1493 #define FLG_ARMEM_PROC (Ar_mem *)-1
1488 1494
1489 1495 typedef struct ar_desc {
1490 1496 const char *ad_name; /* archive file name */
1491 1497 Elf *ad_elf; /* elf descriptor for the archive */
1492 1498 Elf_Arsym *ad_start; /* archive symbol table start */
1493 1499 Ar_aux *ad_aux; /* auxiliary symbol information */
1494 1500 dev_t ad_stdev; /* device id and inode number for */
1495 1501 ino_t ad_stino; /* multiple inclusion checks */
1496 1502 ofl_flag_t ad_flags; /* archive specific cmd line flags */
1497 1503 } Ar_desc;
1498 1504
1499 1505 /*
1500 1506 * Define any archive descriptor flags. NOTE, make sure they do not clash with
1501 1507 * any output file descriptor archive extraction flags, as these are saved in
1502 1508 * the same entry (see MSK_OF1_ARCHIVE).
1503 1509 */
1504 1510 #define FLG_ARD_EXTRACT 0x00010000 /* archive member has been extracted */
1505 1511
1506 1512 /* Mapfile versions supported by libld */
1507 1513 #define MFV_NONE 0 /* Not a valid version */
1508 1514 #define MFV_SYSV 1 /* Original System V syntax */
1509 1515 #define MFV_SOLARIS 2 /* Solaris mapfile syntax */
1510 1516 #define MFV_NUM 3 /* # of mapfile versions */
1511 1517
1512 1518
1513 1519 /*
1514 1520 * Function Declarations.
1515 1521 */
1516 1522 #if defined(_ELF64)
1517 1523
1518 1524 #define ld_create_outfile ld64_create_outfile
1519 1525 #define ld_ent_setup ld64_ent_setup
1520 1526 #define ld_init_strings ld64_init_strings
1521 1527 #define ld_init_target ld64_init_target
1522 1528 #define ld_make_sections ld64_make_sections
1523 1529 #define ld_main ld64_main
1524 1530 #define ld_ofl_cleanup ld64_ofl_cleanup
1525 1531 #define ld_process_mem ld64_process_mem
1526 1532 #define ld_reloc_init ld64_reloc_init
1527 1533 #define ld_reloc_process ld64_reloc_process
1528 1534 #define ld_sym_validate ld64_sym_validate
1529 1535 #define ld_update_outfile ld64_update_outfile
1530 1536
1531 1537 #else
1532 1538
1533 1539 #define ld_create_outfile ld32_create_outfile
1534 1540 #define ld_ent_setup ld32_ent_setup
1535 1541 #define ld_init_strings ld32_init_strings
1536 1542 #define ld_init_target ld32_init_target
1537 1543 #define ld_make_sections ld32_make_sections
1538 1544 #define ld_main ld32_main
1539 1545 #define ld_ofl_cleanup ld32_ofl_cleanup
1540 1546 #define ld_process_mem ld32_process_mem
1541 1547 #define ld_reloc_init ld32_reloc_init
1542 1548 #define ld_reloc_process ld32_reloc_process
1543 1549 #define ld_sym_validate ld32_sym_validate
1544 1550 #define ld_update_outfile ld32_update_outfile
1545 1551
1546 1552 #endif
1547 1553
1548 1554 extern int ld_getopt(Lm_list *, int, int, char **);
1549 1555
1550 1556 extern int ld32_main(int, char **, Half);
1551 1557 extern int ld64_main(int, char **, Half);
1552 1558
1553 1559 extern uintptr_t ld_create_outfile(Ofl_desc *);
1554 1560 extern uintptr_t ld_ent_setup(Ofl_desc *, Xword);
1555 1561 extern uintptr_t ld_init_strings(Ofl_desc *);
1556 1562 extern int ld_init_target(Lm_list *, Half mach);
1557 1563 extern uintptr_t ld_make_sections(Ofl_desc *);
1558 1564 extern void ld_ofl_cleanup(Ofl_desc *);
1559 1565 extern Ifl_desc *ld_process_mem(const char *, const char *, char *,
1560 1566 size_t, Ofl_desc *, Rej_desc *);
1561 1567 extern uintptr_t ld_reloc_init(Ofl_desc *);
1562 1568 extern uintptr_t ld_reloc_process(Ofl_desc *);
1563 1569 extern uintptr_t ld_sym_validate(Ofl_desc *);
1564 1570 extern uintptr_t ld_update_outfile(Ofl_desc *);
1565 1571
1566 1572 #ifdef __cplusplus
1567 1573 }
1568 1574 #endif
1569 1575
1570 1576 #endif /* _LIBLD_H */
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