* libcoff-in.h (struct coff_section_tdata): Add offset, i,
[deliverable/binutils-gdb.git] / bfd / libcoff.h
1 /* BFD COFF object file private structure.
2 Copyright (C) 1990, 91, 92, 93, 94, 1995 Free Software Foundation, Inc.
3 Written by Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21 #include "bfdlink.h"
22
23 /* Object file tdata; access macros */
24
25 #define coff_data(bfd) ((bfd)->tdata.coff_obj_data)
26 #define exec_hdr(bfd) (coff_data(bfd)->hdr)
27 #define obj_pe(bfd) (coff_data(bfd)->pe)
28 #define obj_symbols(bfd) (coff_data(bfd)->symbols)
29 #define obj_sym_filepos(bfd) (coff_data(bfd)->sym_filepos)
30
31 #define obj_relocbase(bfd) (coff_data(bfd)->relocbase)
32 #define obj_raw_syments(bfd) (coff_data(bfd)->raw_syments)
33 #define obj_raw_syment_count(bfd) (coff_data(bfd)->raw_syment_count)
34 #define obj_convert(bfd) (coff_data(bfd)->conversion_table)
35 #define obj_conv_table_size(bfd) (coff_data(bfd)->conv_table_size)
36
37 #define obj_coff_external_syms(bfd) (coff_data (bfd)->external_syms)
38 #define obj_coff_keep_syms(bfd) (coff_data (bfd)->keep_syms)
39 #define obj_coff_strings(bfd) (coff_data (bfd)->strings)
40 #define obj_coff_keep_strings(bfd) (coff_data (bfd)->keep_strings)
41 #define obj_coff_sym_hashes(bfd) (coff_data (bfd)->sym_hashes)
42
43 /* `Tdata' information kept for COFF files. */
44
45 typedef struct coff_tdata
46 {
47 struct coff_symbol_struct *symbols; /* symtab for input bfd */
48 unsigned int *conversion_table;
49 int conv_table_size;
50 file_ptr sym_filepos;
51
52 struct coff_ptr_struct *raw_syments;
53 unsigned int raw_syment_count;
54
55 /* These are only valid once writing has begun */
56 long int relocbase;
57
58 /* These members communicate important constants about the symbol table
59 to GDB's symbol-reading code. These `constants' unfortunately vary
60 from coff implementation to implementation... */
61 unsigned local_n_btmask;
62 unsigned local_n_btshft;
63 unsigned local_n_tmask;
64 unsigned local_n_tshift;
65 unsigned local_symesz;
66 unsigned local_auxesz;
67 unsigned local_linesz;
68
69 /* The unswapped external symbols. May be NULL. Read by
70 _bfd_coff_get_external_symbols. */
71 PTR external_syms;
72 /* If this is true, the external_syms may not be freed. */
73 boolean keep_syms;
74
75 /* The string table. May be NULL. Read by
76 _bfd_coff_read_string_table. */
77 char *strings;
78 /* If this is true, the strings may not be freed. */
79 boolean keep_strings;
80
81 /* is this a PE format coff file */
82 int pe;
83 /* Used by the COFF backend linker. */
84 struct coff_link_hash_entry **sym_hashes;
85
86 struct bfd_link_info *link_info;
87 } coff_data_type;
88
89 /* Tdata for pe image files. */
90 typedef struct pe_tdata
91 {
92 coff_data_type coff;
93 struct internal_extra_pe_aouthdr pe_opthdr;
94 int dll;
95 int has_reloc_section;
96 } pe_data_type;
97
98 #define pe_data(bfd) ((bfd)->tdata.pe_obj_data)
99
100
101 /* We take the address of the first element of a asymbol to ensure that the
102 * macro is only ever applied to an asymbol. */
103 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
104
105 /* The used_by_bfd field of a section may be set to a pointer to this
106 structure. */
107
108 struct coff_section_tdata
109 {
110 /* The relocs, swapped into COFF internal form. This may be NULL. */
111 struct internal_reloc *relocs;
112 /* If this is true, the relocs entry may not be freed. */
113 boolean keep_relocs;
114 /* The section contents. This may be NULL. */
115 bfd_byte *contents;
116 /* If this is true, the contents entry may not be freed. */
117 boolean keep_contents;
118 /* Information cached by coff_find_nearest_line. */
119 bfd_vma offset;
120 unsigned int i;
121 const char *function;
122 int line_base;
123 /* Available for individual backends. */
124 PTR tdata;
125 };
126
127 /* An accessor macro for the coff_section_tdata structure. */
128 #define coff_section_data(abfd, sec) \
129 ((struct coff_section_tdata *) (sec)->used_by_bfd)
130
131 /* COFF linker hash table entries. */
132
133 struct coff_link_hash_entry
134 {
135 struct bfd_link_hash_entry root;
136
137 /* Symbol index in output file. Set to -1 initially. Set to -2 if
138 there is a reloc against this symbol. */
139 long indx;
140
141 /* Symbol type. */
142 unsigned short type;
143
144 /* Symbol class. */
145 unsigned char class;
146
147 /* Number of auxiliary entries. */
148 char numaux;
149
150 /* BFD to take auxiliary entries from. */
151 bfd *auxbfd;
152
153 /* Pointer to array of auxiliary entries, if any. */
154 union internal_auxent *aux;
155 };
156
157 /* COFF linker hash table. */
158
159 struct coff_link_hash_table
160 {
161 struct bfd_link_hash_table root;
162 };
163
164 /* Look up an entry in a COFF linker hash table. */
165
166 #define coff_link_hash_lookup(table, string, create, copy, follow) \
167 ((struct coff_link_hash_entry *) \
168 bfd_link_hash_lookup (&(table)->root, (string), (create), \
169 (copy), (follow)))
170
171 /* Traverse a COFF linker hash table. */
172
173 #define coff_link_hash_traverse(table, func, info) \
174 (bfd_link_hash_traverse \
175 (&(table)->root, \
176 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
177 (info)))
178
179 /* Get the COFF linker hash table from a link_info structure. */
180
181 #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
182
183 /* Functions in coffgen.c. */
184 extern const bfd_target *coff_object_p PARAMS ((bfd *));
185 extern struct sec *coff_section_from_bfd_index PARAMS ((bfd *, int));
186 extern long coff_get_symtab_upper_bound PARAMS ((bfd *));
187 extern long coff_get_symtab PARAMS ((bfd *, asymbol **));
188 extern int coff_count_linenumbers PARAMS ((bfd *));
189 extern struct coff_symbol_struct *coff_symbol_from PARAMS ((bfd *, asymbol *));
190 extern boolean coff_renumber_symbols PARAMS ((bfd *, int *));
191 extern void coff_mangle_symbols PARAMS ((bfd *));
192 extern boolean coff_write_symbols PARAMS ((bfd *));
193 extern boolean coff_write_linenumbers PARAMS ((bfd *));
194 extern alent *coff_get_lineno PARAMS ((bfd *, asymbol *));
195 extern asymbol *coff_section_symbol PARAMS ((bfd *, char *));
196 extern boolean _bfd_coff_get_external_symbols PARAMS ((bfd *));
197 extern const char *_bfd_coff_read_string_table PARAMS ((bfd *));
198 extern boolean _bfd_coff_free_symbols PARAMS ((bfd *));
199 extern struct coff_ptr_struct *coff_get_normalized_symtab PARAMS ((bfd *));
200 extern long coff_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
201 extern asymbol *coff_make_empty_symbol PARAMS ((bfd *));
202 extern void coff_print_symbol PARAMS ((bfd *, PTR filep, asymbol *,
203 bfd_print_symbol_type how));
204 extern void coff_get_symbol_info PARAMS ((bfd *, asymbol *,
205 symbol_info *ret));
206 extern asymbol *coff_bfd_make_debug_symbol PARAMS ((bfd *, PTR,
207 unsigned long));
208 extern boolean coff_find_nearest_line PARAMS ((bfd *,
209 asection *,
210 asymbol **,
211 bfd_vma offset,
212 CONST char **filename_ptr,
213 CONST char **functionname_ptr,
214 unsigned int *line_ptr));
215 extern int coff_sizeof_headers PARAMS ((bfd *, boolean reloc));
216 extern boolean bfd_coff_reloc16_relax_section
217 PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
218 extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
219 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
220 bfd_byte *, boolean relocateable, asymbol **));
221 extern bfd_vma bfd_coff_reloc16_get_value PARAMS ((arelent *,
222 struct bfd_link_info *,
223 asection *));
224 extern void bfd_perform_slip PARAMS ((bfd *abfd, unsigned int slip,
225 asection *input_section,
226 bfd_vma val));
227
228 /* Functions in cofflink.c. */
229
230 extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
231 PARAMS ((bfd *));
232 extern const char *_bfd_coff_internal_syment_name
233 PARAMS ((bfd *, const struct internal_syment *, char *));
234 extern boolean _bfd_coff_link_add_symbols
235 PARAMS ((bfd *, struct bfd_link_info *));
236 extern boolean _bfd_coff_final_link
237 PARAMS ((bfd *, struct bfd_link_info *));
238 extern struct internal_reloc *_bfd_coff_read_internal_relocs
239 PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean,
240 struct internal_reloc *));
241 extern boolean _bfd_coff_generic_relocate_section
242 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
243 struct internal_reloc *, struct internal_syment *, asection **));
244
245 /* And more taken from the source .. */
246
247 typedef struct coff_ptr_struct
248 {
249
250 /* Remembers the offset from the first symbol in the file for
251 this symbol. Generated by coff_renumber_symbols. */
252 unsigned int offset;
253
254 /* Should the value of this symbol be renumbered. Used for
255 XCOFF C_BSTAT symbols. Set by coff_slurp_symbol_table. */
256 unsigned int fix_value : 1;
257
258 /* Should the tag field of this symbol be renumbered.
259 Created by coff_pointerize_aux. */
260 unsigned int fix_tag : 1;
261
262 /* Should the endidx field of this symbol be renumbered.
263 Created by coff_pointerize_aux. */
264 unsigned int fix_end : 1;
265
266 /* Should the x_csect.x_scnlen field be renumbered.
267 Created by coff_slurp_symbol_table. */
268 unsigned int fix_scnlen : 1;
269
270 /* The container for the symbol structure as read and translated
271 from the file. */
272
273 union {
274 union internal_auxent auxent;
275 struct internal_syment syment;
276 } u;
277 } combined_entry_type;
278
279
280 /* Each canonical asymbol really looks like this: */
281
282 typedef struct coff_symbol_struct
283 {
284 /* The actual symbol which the rest of BFD works with */
285 asymbol symbol;
286
287 /* A pointer to the hidden information for this symbol */
288 combined_entry_type *native;
289
290 /* A pointer to the linenumber information for this symbol */
291 struct lineno_cache_entry *lineno;
292
293 /* Have the line numbers been relocated yet ? */
294 boolean done_lineno;
295 } coff_symbol_type;
296 typedef struct
297 {
298 void (*_bfd_coff_swap_aux_in) PARAMS ((
299 bfd *abfd,
300 PTR ext,
301 int type,
302 int class,
303 int indaux,
304 int numaux,
305 PTR in));
306
307 void (*_bfd_coff_swap_sym_in) PARAMS ((
308 bfd *abfd ,
309 PTR ext,
310 PTR in));
311
312 void (*_bfd_coff_swap_lineno_in) PARAMS ((
313 bfd *abfd,
314 PTR ext,
315 PTR in));
316
317 unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
318 bfd *abfd,
319 PTR in,
320 int type,
321 int class,
322 int indaux,
323 int numaux,
324 PTR ext));
325
326 unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
327 bfd *abfd,
328 PTR in,
329 PTR ext));
330
331 unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
332 bfd *abfd,
333 PTR in,
334 PTR ext));
335
336 unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
337 bfd *abfd,
338 PTR src,
339 PTR dst));
340
341 unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
342 bfd *abfd,
343 PTR in,
344 PTR out));
345
346 unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
347 bfd *abfd,
348 PTR in,
349 PTR out));
350
351 unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
352 bfd *abfd,
353 PTR in,
354 PTR out));
355
356 unsigned int _bfd_filhsz;
357 unsigned int _bfd_aoutsz;
358 unsigned int _bfd_scnhsz;
359 unsigned int _bfd_symesz;
360 unsigned int _bfd_auxesz;
361 unsigned int _bfd_relsz;
362 unsigned int _bfd_linesz;
363 boolean _bfd_coff_long_filenames;
364 void (*_bfd_coff_swap_filehdr_in) PARAMS ((
365 bfd *abfd,
366 PTR ext,
367 PTR in));
368 void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
369 bfd *abfd,
370 PTR ext,
371 PTR in));
372 void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
373 bfd *abfd,
374 PTR ext,
375 PTR in));
376 void (*_bfd_coff_swap_reloc_in) PARAMS ((
377 bfd *abfd,
378 PTR ext,
379 PTR in));
380 boolean (*_bfd_coff_bad_format_hook) PARAMS ((
381 bfd *abfd,
382 PTR internal_filehdr));
383 boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
384 bfd *abfd,
385 PTR internal_filehdr));
386 PTR (*_bfd_coff_mkobject_hook) PARAMS ((
387 bfd *abfd,
388 PTR internal_filehdr,
389 PTR internal_aouthdr));
390 flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
391 bfd *abfd,
392 PTR internal_scnhdr,
393 const char *name));
394 asection *(*_bfd_make_section_hook) PARAMS ((
395 bfd *abfd,
396 char *name));
397 void (*_bfd_set_alignment_hook) PARAMS ((
398 bfd *abfd,
399 asection *sec,
400 PTR internal_scnhdr));
401 boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
402 bfd *abfd));
403 boolean (*_bfd_coff_symname_in_debug) PARAMS ((
404 bfd *abfd,
405 struct internal_syment *sym));
406 void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
407 bfd *abfd,
408 struct bfd_link_info *link_info,
409 struct bfd_link_order *link_order,
410 arelent *reloc,
411 bfd_byte *data,
412 unsigned int *src_ptr,
413 unsigned int *dst_ptr));
414 int (*_bfd_coff_reloc16_estimate) PARAMS ((
415 bfd *abfd,
416 asection *input_section,
417 arelent *r,
418 unsigned int shrink,
419 struct bfd_link_info *link_info));
420 boolean (*_bfd_coff_sym_is_global) PARAMS ((
421 bfd *abfd,
422 struct internal_syment *));
423 void (*_bfd_coff_compute_section_file_positions) PARAMS ((
424 bfd *abfd));
425 boolean (*_bfd_coff_start_final_link) PARAMS ((
426 bfd *output_bfd,
427 struct bfd_link_info *info));
428 boolean (*_bfd_coff_relocate_section) PARAMS ((
429 bfd *output_bfd,
430 struct bfd_link_info *info,
431 bfd *input_bfd,
432 asection *input_section,
433 bfd_byte *contents,
434 struct internal_reloc *relocs,
435 struct internal_syment *syms,
436 asection **sections));
437 reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
438 bfd *abfd,
439 asection *sec,
440 struct internal_reloc *rel,
441 struct coff_link_hash_entry *h,
442 struct internal_syment *sym,
443 bfd_vma *addendp));
444 boolean (*_bfd_coff_adjust_symndx) PARAMS ((
445 bfd *obfd,
446 struct bfd_link_info *info,
447 bfd *ibfd,
448 asection *sec,
449 struct internal_reloc *reloc,
450 boolean *adjustedp));
451
452 } bfd_coff_backend_data;
453
454 #define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
455
456 #define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
457 ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
458
459 #define bfd_coff_swap_sym_in(a,e,i) \
460 ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
461
462 #define bfd_coff_swap_lineno_in(a,e,i) \
463 ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
464
465 #define bfd_coff_swap_reloc_out(abfd, i, o) \
466 ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
467
468 #define bfd_coff_swap_lineno_out(abfd, i, o) \
469 ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
470
471 #define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
472 ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
473
474 #define bfd_coff_swap_sym_out(abfd, i,o) \
475 ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
476
477 #define bfd_coff_swap_scnhdr_out(abfd, i,o) \
478 ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
479
480 #define bfd_coff_swap_filehdr_out(abfd, i,o) \
481 ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
482
483 #define bfd_coff_swap_aouthdr_out(abfd, i,o) \
484 ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
485
486 #define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
487 #define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
488 #define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
489 #define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
490 #define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
491 #define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
492 #define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
493 #define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
494 #define bfd_coff_swap_filehdr_in(abfd, i,o) \
495 ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
496
497 #define bfd_coff_swap_aouthdr_in(abfd, i,o) \
498 ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
499
500 #define bfd_coff_swap_scnhdr_in(abfd, i,o) \
501 ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
502
503 #define bfd_coff_swap_reloc_in(abfd, i, o) \
504 ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
505
506 #define bfd_coff_bad_format_hook(abfd, filehdr) \
507 ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
508
509 #define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
510 ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
511 #define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
512 ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
513
514 #define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\
515 ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name))
516
517 #define bfd_coff_make_section_hook(abfd, name)\
518 ((coff_backend_info (abfd)->_bfd_make_section_hook) (abfd, name))
519
520 #define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
521 ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
522
523 #define bfd_coff_slurp_symbol_table(abfd)\
524 ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
525
526 #define bfd_coff_symname_in_debug(abfd, sym)\
527 ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
528
529 #define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
530 ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
531 (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
532
533 #define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
534 ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
535 (abfd, section, reloc, shrink, link_info))
536
537 #define bfd_coff_sym_is_global(abfd, sym)\
538 ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\
539 (abfd, sym))
540
541 #define bfd_coff_compute_section_file_positions(abfd)\
542 ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
543 (abfd))
544
545 #define bfd_coff_start_final_link(obfd, info)\
546 ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
547 (obfd, info))
548 #define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
549 ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
550 (obfd, info, ibfd, o, con, rel, isyms, secs))
551 #define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
552 ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
553 (abfd, sec, rel, h, sym, addendp))
554 #define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
555 ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
556 (obfd, info, ibfd, sec, rel, adjustedp))
557
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