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aadf04f7 SS |
1 | /* POWER/PowerPC XCOFF linker support. |
2 | Copyright 1995 Free Software Foundation, Inc. | |
3 | Written by Ian Lance Taylor <ian@cygnus.com>, 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 "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "bfdlink.h" | |
24 | #include "libbfd.h" | |
25 | #include "coff/internal.h" | |
26 | #include "libcoff.h" | |
27 | ||
28 | /* This file holds the XCOFF linker code. A lot of it is very similar | |
29 | to the COFF linker code. However, it is different enough that I | |
30 | chose to avoid trying to hack up the COFF code to support XCOFF. | |
31 | That leads to a certain amount of duplicated code, alas. */ | |
32 | ||
33 | #define STRING_SIZE_SIZE (4) | |
34 | ||
35 | /* Get the XCOFF hash table entries for a BFD. */ | |
36 | #define obj_xcoff_sym_hashes(bfd) \ | |
37 | ((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd)) | |
38 | ||
28a0c103 ILT |
39 | /* XCOFF relocation types. These probably belong in a header file |
40 | somewhere. The relocations are described in the function | |
41 | _bfd_ppc_xcoff_relocate_section in this file. */ | |
42 | ||
43 | #define R_POS (0x00) | |
44 | #define R_NEG (0x01) | |
45 | #define R_REL (0x02) | |
46 | #define R_TOC (0x03) | |
47 | #define R_RTB (0x04) | |
48 | #define R_GL (0x05) | |
49 | #define R_TCL (0x06) | |
50 | #define R_BA (0x08) | |
51 | #define R_BR (0x0a) | |
52 | #define R_RL (0x0c) | |
53 | #define R_RLA (0x0d) | |
54 | #define R_REF (0x0f) | |
55 | #define R_TRL (0x12) | |
56 | #define R_TRLA (0x13) | |
57 | #define R_RRTBI (0x14) | |
58 | #define R_RRTBA (0x15) | |
59 | #define R_CAI (0x16) | |
60 | #define R_CREL (0x17) | |
61 | #define R_RBA (0x18) | |
62 | #define R_RBAC (0x19) | |
63 | #define R_RBR (0x1a) | |
64 | #define R_RBRC (0x1b) | |
65 | ||
66 | /* The first word of global linkage code. This must be modified by | |
67 | filling in the correct TOC offset. */ | |
68 | ||
69 | #define XCOFF_GLINK_FIRST (0x81820000) /* lwz r12,0(r2) */ | |
70 | ||
71 | /* The remaining words of global linkage code. */ | |
72 | ||
73 | static unsigned long xcoff_glink_code[] = | |
74 | { | |
75 | 0x90410014, /* stw r2,20(r1) */ | |
76 | 0x800c0000, /* lwz r0,0(r12) */ | |
77 | 0x804c0004, /* lwz r2,4(r12) */ | |
78 | 0x7c0903a6, /* mtctr r0 */ | |
79 | 0x4e800420, /* bctr */ | |
80 | 0x0, /* start of traceback table */ | |
81 | 0x000c8000, /* traceback table */ | |
82 | 0x0 /* traceback table */ | |
83 | }; | |
84 | ||
85 | #define XCOFF_GLINK_SIZE \ | |
86 | (((sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]) * 4) + 4) | |
87 | ||
88 | /* We reuse the SEC_ROM flag as a mark flag for garbage collection. | |
89 | This flag will only be used on input sections. */ | |
90 | ||
91 | #define SEC_MARK (SEC_ROM) | |
92 | ||
93 | /* The ldhdr structure. This appears at the start of the .loader | |
94 | section. */ | |
95 | ||
96 | struct internal_ldhdr | |
97 | { | |
98 | /* The version number: currently always 1. */ | |
99 | unsigned long l_version; | |
100 | /* The number of symbol table entries. */ | |
101 | bfd_size_type l_nsyms; | |
102 | /* The number of relocation table entries. */ | |
103 | bfd_size_type l_nreloc; | |
104 | /* The length of the import file string table. */ | |
105 | bfd_size_type l_istlen; | |
106 | /* The number of import files. */ | |
107 | bfd_size_type l_nimpid; | |
108 | /* The offset from the start of the .loader section to the first | |
109 | entry in the import file table. */ | |
110 | bfd_size_type l_impoff; | |
111 | /* The length of the string table. */ | |
112 | bfd_size_type l_stlen; | |
113 | /* The offset from the start of the .loader section to the first | |
114 | entry in the string table. */ | |
115 | bfd_size_type l_stoff; | |
116 | }; | |
117 | ||
118 | struct external_ldhdr | |
119 | { | |
120 | bfd_byte l_version[4]; | |
121 | bfd_byte l_nsyms[4]; | |
122 | bfd_byte l_nreloc[4]; | |
123 | bfd_byte l_istlen[4]; | |
124 | bfd_byte l_nimpid[4]; | |
125 | bfd_byte l_impoff[4]; | |
126 | bfd_byte l_stlen[4]; | |
127 | bfd_byte l_stoff[4]; | |
128 | }; | |
129 | ||
130 | #define LDHDRSZ (8 * 4) | |
131 | ||
132 | /* The ldsym structure. This is used to represent a symbol in the | |
133 | .loader section. */ | |
134 | ||
135 | struct internal_ldsym | |
136 | { | |
137 | union | |
138 | { | |
139 | /* The symbol name if <= SYMNMLEN characters. */ | |
140 | char _l_name[SYMNMLEN]; | |
141 | struct | |
142 | { | |
143 | /* Zero if the symbol name is more than SYMNMLEN characters. */ | |
144 | long _l_zeroes; | |
145 | /* The offset in the string table if the symbol name is more | |
146 | than SYMNMLEN characters. */ | |
147 | long _l_offset; | |
148 | } _l_l; | |
149 | } _l; | |
150 | /* The symbol value. */ | |
151 | bfd_vma l_value; | |
152 | /* The symbol section number. */ | |
153 | short l_scnum; | |
154 | /* The symbol type and flags. */ | |
155 | char l_smtype; | |
156 | /* The symbol storage class. */ | |
157 | char l_smclas; | |
158 | /* The import file ID. */ | |
159 | bfd_size_type l_ifile; | |
160 | /* Offset to the parameter type check string. */ | |
161 | bfd_size_type l_parm; | |
162 | }; | |
163 | ||
164 | struct external_ldsym | |
165 | { | |
166 | union | |
167 | { | |
168 | bfd_byte _l_name[SYMNMLEN]; | |
169 | struct | |
170 | { | |
171 | bfd_byte _l_zeroes[4]; | |
172 | bfd_byte _l_offset[4]; | |
173 | } _l_l; | |
174 | } _l; | |
175 | bfd_byte l_value[4]; | |
176 | bfd_byte l_scnum[2]; | |
177 | bfd_byte l_smtype[1]; | |
178 | bfd_byte l_smclas[1]; | |
179 | bfd_byte l_ifile[4]; | |
180 | bfd_byte l_parm[4]; | |
181 | }; | |
182 | ||
183 | #define LDSYMSZ (8 + 3 * 4 + 2 + 2) | |
184 | ||
185 | /* These flags are for the l_smtype field (the lower three bits are an | |
186 | XTY_* value). */ | |
187 | ||
188 | /* Imported symbol. */ | |
189 | #define L_IMPORT (0x40) | |
190 | /* Entry point. */ | |
191 | #define L_ENTRY (0x20) | |
192 | /* Exported symbol. */ | |
193 | #define L_EXPORT (0x10) | |
194 | ||
195 | /* The ldrel structure. This is used to represent a reloc in the | |
196 | .loader section. */ | |
197 | ||
198 | struct internal_ldrel | |
199 | { | |
200 | /* The reloc address. */ | |
201 | bfd_vma l_vaddr; | |
202 | /* The symbol table index in the .loader section symbol table. */ | |
203 | bfd_size_type l_symndx; | |
204 | /* The relocation type and size. */ | |
205 | short l_rtype; | |
206 | /* The section number this relocation applies to. */ | |
207 | short l_rsecnm; | |
208 | }; | |
209 | ||
210 | struct external_ldrel | |
211 | { | |
212 | bfd_byte l_vaddr[4]; | |
213 | bfd_byte l_symndx[4]; | |
214 | bfd_byte l_rtype[2]; | |
215 | bfd_byte l_rsecnm[2]; | |
216 | }; | |
217 | ||
218 | #define LDRELSZ (2 * 4 + 2 * 2) | |
219 | ||
220 | /* The list of import files. */ | |
221 | ||
222 | struct xcoff_import_file | |
223 | { | |
224 | /* The next entry in the list. */ | |
225 | struct xcoff_import_file *next; | |
226 | /* The path. */ | |
227 | const char *path; | |
228 | /* The file name. */ | |
229 | const char *file; | |
230 | /* The member name. */ | |
231 | const char *member; | |
232 | }; | |
233 | ||
aadf04f7 SS |
234 | /* An entry in the XCOFF linker hash table. */ |
235 | ||
236 | struct xcoff_link_hash_entry | |
237 | { | |
238 | struct bfd_link_hash_entry root; | |
239 | ||
aadf04f7 SS |
240 | /* Symbol index in output file. Set to -1 initially. Set to -2 if |
241 | there is a reloc against this symbol. */ | |
242 | long indx; | |
243 | ||
28a0c103 ILT |
244 | /* If we have created a TOC entry for this symbol, this is the .tc |
245 | section which holds it. */ | |
246 | asection *toc_section; | |
247 | ||
248 | /* If we have created a TOC entry, this is the offset in | |
249 | toc_section. */ | |
250 | bfd_vma toc_offset; | |
251 | ||
252 | /* If this symbol is a function entry point which is called, this | |
253 | field holds a pointer to the function descriptor. */ | |
254 | struct xcoff_link_hash_entry *descriptor; | |
255 | ||
256 | /* The .loader symbol table entry, if there is one. */ | |
257 | struct internal_ldsym *ldsym; | |
258 | ||
259 | /* The .loader symbol table index. */ | |
260 | long ldindx; | |
261 | ||
262 | /* Some linker flags. */ | |
263 | unsigned short flags; | |
264 | /* Symbol is referenced by a regular object. */ | |
265 | #define XCOFF_REF_REGULAR (01) | |
266 | /* Symbol is defined by a regular object. */ | |
267 | #define XCOFF_DEF_REGULAR (02) | |
268 | /* Symbol is referenced by a dynamic object. */ | |
269 | #define XCOFF_REF_DYNAMIC (04) | |
270 | /* Symbol is used in a reloc being copied into the .loader section. */ | |
271 | #define XCOFF_LDREL (010) | |
272 | /* Symbol is the entry point. */ | |
273 | #define XCOFF_ENTRY (020) | |
274 | /* Symbol is called; this is, it appears in a R_BR reloc. */ | |
275 | #define XCOFF_CALLED (040) | |
276 | /* Symbol needs the TOC entry filled in. */ | |
277 | #define XCOFF_SET_TOC (0100) | |
278 | /* Symbol is explicitly imported. */ | |
279 | #define XCOFF_IMPORT (0200) | |
280 | /* Symbol is explicitly exported. */ | |
281 | #define XCOFF_EXPORT (0400) | |
282 | /* Symbol has been processed by xcoff_build_ldsyms. */ | |
283 | #define XCOFF_BUILT_LDSYM (01000) | |
284 | /* Symbol is mentioned by a section which was not garbage collected. */ | |
285 | #define XCOFF_MARK (02000) | |
286 | ||
287 | /* The storage mapping class. */ | |
288 | unsigned char smclas; | |
aadf04f7 SS |
289 | }; |
290 | ||
291 | /* The XCOFF linker hash table. */ | |
292 | ||
293 | struct xcoff_link_hash_table | |
294 | { | |
295 | struct bfd_link_hash_table root; | |
296 | ||
297 | /* The .debug string hash table. We need to compute this while | |
298 | reading the input files, so that we know how large the .debug | |
299 | section will be before we assign section positions. */ | |
300 | struct bfd_strtab_hash *debug_strtab; | |
301 | ||
302 | /* The .debug section we will use for the final output. */ | |
303 | asection *debug_section; | |
28a0c103 ILT |
304 | |
305 | /* The .loader section we will use for the final output. */ | |
306 | asection *loader_section; | |
307 | ||
308 | /* A count of non TOC relative relocs which will need to be | |
309 | allocated in the .loader section. */ | |
310 | size_t ldrel_count; | |
311 | ||
312 | /* The .loader section header. */ | |
313 | struct internal_ldhdr ldhdr; | |
314 | ||
315 | /* The .gl section we use to hold global linkage code. */ | |
316 | asection *linkage_section; | |
317 | ||
318 | /* The .tc section we use to hold toc entries we build for global | |
319 | linkage code. */ | |
320 | asection *toc_section; | |
321 | ||
322 | /* The list of import files. */ | |
323 | struct xcoff_import_file *imports; | |
324 | ||
325 | /* Required alignment of sections within the output file. */ | |
326 | unsigned long file_align; | |
327 | ||
328 | /* Whether the .text section must be read-only. */ | |
329 | boolean textro; | |
330 | ||
331 | /* Whether garbage collection was done. */ | |
332 | boolean gc; | |
aadf04f7 SS |
333 | }; |
334 | ||
28a0c103 ILT |
335 | /* Information we keep for each section in the output file during the |
336 | final link phase. */ | |
aadf04f7 SS |
337 | |
338 | struct xcoff_link_section_info | |
339 | { | |
340 | /* The relocs to be output. */ | |
341 | struct internal_reloc *relocs; | |
342 | /* For each reloc against a global symbol whose index was not known | |
343 | when the reloc was handled, the global hash table entry. */ | |
344 | struct xcoff_link_hash_entry **rel_hashes; | |
345 | }; | |
346 | ||
347 | /* Information that we pass around while doing the final link step. */ | |
348 | ||
349 | struct xcoff_final_link_info | |
350 | { | |
351 | /* General link information. */ | |
352 | struct bfd_link_info *info; | |
353 | /* Output BFD. */ | |
354 | bfd *output_bfd; | |
355 | /* Hash table for long symbol names. */ | |
356 | struct bfd_strtab_hash *strtab; | |
357 | /* Array of information kept for each output section, indexed by the | |
358 | target_index field. */ | |
359 | struct xcoff_link_section_info *section_info; | |
360 | /* Symbol index of last C_FILE symbol (-1 if none). */ | |
361 | long last_file_index; | |
362 | /* Contents of last C_FILE symbol. */ | |
363 | struct internal_syment last_file; | |
364 | /* Symbol index of TOC symbol. */ | |
365 | long toc_symindx; | |
28a0c103 ILT |
366 | /* Start of .loader symbols. */ |
367 | struct external_ldsym *ldsym; | |
368 | /* Next .loader reloc to swap out. */ | |
369 | struct external_ldrel *ldrel; | |
aadf04f7 SS |
370 | /* Buffer large enough to hold swapped symbols of any input file. */ |
371 | struct internal_syment *internal_syms; | |
372 | /* Buffer large enough to hold output indices of symbols of any | |
373 | input file. */ | |
374 | long *sym_indices; | |
375 | /* Buffer large enough to hold output symbols for any input file. */ | |
376 | bfd_byte *outsyms; | |
377 | /* Buffer large enough to hold external line numbers for any input | |
378 | section. */ | |
379 | bfd_byte *linenos; | |
380 | /* Buffer large enough to hold any input section. */ | |
381 | bfd_byte *contents; | |
382 | /* Buffer large enough to hold external relocs of any input section. */ | |
383 | bfd_byte *external_relocs; | |
384 | }; | |
385 | ||
28a0c103 ILT |
386 | static void xcoff_swap_ldhdr_out |
387 | PARAMS ((bfd *, const struct internal_ldhdr *, struct external_ldhdr *)); | |
388 | static void xcoff_swap_ldsym_out | |
389 | PARAMS ((bfd *, const struct internal_ldsym *, struct external_ldsym *)); | |
390 | static void xcoff_swap_ldrel_out | |
391 | PARAMS ((bfd *, const struct internal_ldrel *, struct external_ldrel *)); | |
aadf04f7 SS |
392 | static struct bfd_hash_entry *xcoff_link_hash_newfunc |
393 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
28a0c103 ILT |
394 | static struct internal_reloc *xcoff_read_internal_relocs |
395 | PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean, | |
396 | struct internal_reloc *)); | |
aadf04f7 SS |
397 | static boolean xcoff_link_add_object_symbols |
398 | PARAMS ((bfd *, struct bfd_link_info *)); | |
399 | static boolean xcoff_link_check_archive_element | |
400 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); | |
401 | static boolean xcoff_link_check_ar_symbols | |
402 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); | |
403 | static boolean xcoff_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *)); | |
28a0c103 ILT |
404 | static boolean xcoff_link_add_dynamic_symbols |
405 | PARAMS ((bfd *, struct bfd_link_info *)); | |
406 | static boolean xcoff_mark PARAMS ((struct bfd_link_info *, asection *)); | |
407 | static void xcoff_sweep PARAMS ((struct bfd_link_info *)); | |
408 | static boolean xcoff_build_ldsyms | |
409 | PARAMS ((struct xcoff_link_hash_entry *, PTR)); | |
aadf04f7 SS |
410 | static boolean xcoff_link_input_bfd |
411 | PARAMS ((struct xcoff_final_link_info *, bfd *)); | |
412 | static boolean xcoff_write_global_symbol | |
413 | PARAMS ((struct xcoff_link_hash_entry *, PTR)); | |
414 | static boolean xcoff_reloc_link_order | |
415 | PARAMS ((bfd *, struct xcoff_final_link_info *, asection *, | |
416 | struct bfd_link_order *)); | |
417 | static int xcoff_sort_relocs PARAMS ((const PTR, const PTR)); | |
28a0c103 ILT |
418 | \f |
419 | /* Routines to swap information in the XCOFF .loader section. We only | |
420 | need to swap this information out, not in. I believe that only the | |
421 | loader needs to swap this information in. If we ever need to write | |
422 | an XCOFF loader, this stuff will need to be moved to another file | |
423 | shared by the linker (which XCOFF calls the ``binder'') and the | |
424 | loader. */ | |
425 | ||
426 | /* Swap out the ldhdr structure. */ | |
427 | ||
428 | static void | |
429 | xcoff_swap_ldhdr_out (abfd, src, dst) | |
430 | bfd *abfd; | |
431 | const struct internal_ldhdr *src; | |
432 | struct external_ldhdr *dst; | |
433 | { | |
434 | bfd_put_32 (abfd, src->l_version, dst->l_version); | |
435 | bfd_put_32 (abfd, src->l_nsyms, dst->l_nsyms); | |
436 | bfd_put_32 (abfd, src->l_nreloc, dst->l_nreloc); | |
437 | bfd_put_32 (abfd, src->l_istlen, dst->l_istlen); | |
438 | bfd_put_32 (abfd, src->l_nimpid, dst->l_nimpid); | |
439 | bfd_put_32 (abfd, src->l_impoff, dst->l_impoff); | |
440 | bfd_put_32 (abfd, src->l_stlen, dst->l_stlen); | |
441 | bfd_put_32 (abfd, src->l_stoff, dst->l_stoff); | |
442 | } | |
443 | ||
444 | /* Swap out the ldsym structure. */ | |
445 | ||
446 | static void | |
447 | xcoff_swap_ldsym_out (abfd, src, dst) | |
448 | bfd *abfd; | |
449 | const struct internal_ldsym *src; | |
450 | struct external_ldsym *dst; | |
451 | { | |
452 | if (src->_l._l_l._l_zeroes != 0) | |
453 | memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN); | |
454 | else | |
455 | { | |
456 | bfd_put_32 (abfd, 0, dst->_l._l_l._l_zeroes); | |
457 | bfd_put_32 (abfd, src->_l._l_l._l_offset, dst->_l._l_l._l_offset); | |
458 | } | |
459 | bfd_put_32 (abfd, src->l_value, dst->l_value); | |
460 | bfd_put_16 (abfd, src->l_scnum, dst->l_scnum); | |
461 | bfd_put_8 (abfd, src->l_smtype, dst->l_smtype); | |
462 | bfd_put_8 (abfd, src->l_smclas, dst->l_smclas); | |
463 | bfd_put_32 (abfd, src->l_ifile, dst->l_ifile); | |
464 | bfd_put_32 (abfd, src->l_parm, dst->l_parm); | |
465 | } | |
aadf04f7 | 466 | |
28a0c103 ILT |
467 | /* Swap out the ldrel structure. */ |
468 | ||
469 | static void | |
470 | xcoff_swap_ldrel_out (abfd, src, dst) | |
471 | bfd *abfd; | |
472 | const struct internal_ldrel *src; | |
473 | struct external_ldrel *dst; | |
474 | { | |
475 | bfd_put_32 (abfd, src->l_vaddr, dst->l_vaddr); | |
476 | bfd_put_32 (abfd, src->l_symndx, dst->l_symndx); | |
477 | bfd_put_16 (abfd, src->l_rtype, dst->l_rtype); | |
478 | bfd_put_16 (abfd, src->l_rsecnm, dst->l_rsecnm); | |
479 | } | |
480 | \f | |
aadf04f7 SS |
481 | /* Routine to create an entry in an XCOFF link hash table. */ |
482 | ||
483 | static struct bfd_hash_entry * | |
484 | xcoff_link_hash_newfunc (entry, table, string) | |
485 | struct bfd_hash_entry *entry; | |
486 | struct bfd_hash_table *table; | |
487 | const char *string; | |
488 | { | |
489 | struct xcoff_link_hash_entry *ret = (struct xcoff_link_hash_entry *) entry; | |
490 | ||
491 | /* Allocate the structure if it has not already been allocated by a | |
492 | subclass. */ | |
493 | if (ret == (struct xcoff_link_hash_entry *) NULL) | |
494 | ret = ((struct xcoff_link_hash_entry *) | |
495 | bfd_hash_allocate (table, sizeof (struct xcoff_link_hash_entry))); | |
496 | if (ret == (struct xcoff_link_hash_entry *) NULL) | |
497 | { | |
498 | bfd_set_error (bfd_error_no_memory); | |
499 | return (struct bfd_hash_entry *) ret; | |
500 | } | |
501 | ||
502 | /* Call the allocation method of the superclass. */ | |
503 | ret = ((struct xcoff_link_hash_entry *) | |
504 | _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
505 | table, string)); | |
506 | if (ret != NULL) | |
507 | { | |
508 | /* Set local fields. */ | |
aadf04f7 | 509 | ret->indx = -1; |
28a0c103 ILT |
510 | ret->toc_section = NULL; |
511 | ret->toc_offset = 0; | |
512 | ret->descriptor = NULL; | |
513 | ret->ldsym = NULL; | |
514 | ret->ldindx = -1; | |
515 | ret->flags = 0; | |
516 | ret->smclas = XMC_UA; | |
aadf04f7 SS |
517 | } |
518 | ||
519 | return (struct bfd_hash_entry *) ret; | |
520 | } | |
521 | ||
522 | /* Create a XCOFF link hash table. */ | |
523 | ||
524 | struct bfd_link_hash_table * | |
525 | _bfd_xcoff_bfd_link_hash_table_create (abfd) | |
526 | bfd *abfd; | |
527 | { | |
528 | struct xcoff_link_hash_table *ret; | |
529 | ||
530 | ret = ((struct xcoff_link_hash_table *) | |
531 | bfd_alloc (abfd, sizeof (struct xcoff_link_hash_table))); | |
532 | if (ret == (struct xcoff_link_hash_table *) NULL) | |
533 | { | |
534 | bfd_set_error (bfd_error_no_memory); | |
535 | return (struct bfd_link_hash_table *) NULL; | |
536 | } | |
537 | if (! _bfd_link_hash_table_init (&ret->root, abfd, xcoff_link_hash_newfunc)) | |
538 | { | |
539 | bfd_release (abfd, ret); | |
540 | return (struct bfd_link_hash_table *) NULL; | |
541 | } | |
542 | ||
543 | ret->debug_strtab = _bfd_xcoff_stringtab_init (); | |
544 | ret->debug_section = NULL; | |
28a0c103 ILT |
545 | ret->loader_section = NULL; |
546 | ret->ldrel_count = 0; | |
547 | memset (&ret->ldhdr, 0, sizeof (struct internal_ldhdr)); | |
548 | ret->linkage_section = NULL; | |
549 | ret->toc_section = NULL; | |
550 | ret->imports = NULL; | |
551 | ret->file_align = 0; | |
552 | ret->textro = false; | |
553 | ret->gc = false; | |
aadf04f7 SS |
554 | |
555 | return &ret->root; | |
556 | } | |
557 | ||
558 | /* Look up an entry in an XCOFF link hash table. */ | |
559 | ||
560 | #define xcoff_link_hash_lookup(table, string, create, copy, follow) \ | |
561 | ((struct xcoff_link_hash_entry *) \ | |
562 | bfd_link_hash_lookup (&(table)->root, (string), (create), (copy),\ | |
563 | (follow))) | |
564 | ||
565 | /* Traverse an XCOFF link hash table. */ | |
566 | ||
567 | #define xcoff_link_hash_traverse(table, func, info) \ | |
568 | (bfd_link_hash_traverse \ | |
569 | (&(table)->root, \ | |
570 | (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \ | |
571 | (info))) | |
572 | ||
573 | /* Get the XCOFF link hash table from the info structure. This is | |
574 | just a cast. */ | |
575 | ||
576 | #define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash)) | |
28a0c103 ILT |
577 | \f |
578 | /* Read internal relocs for an XCOFF csect. This is a wrapper around | |
579 | _bfd_coff_read_internal_relocs which tries to take advantage of any | |
580 | relocs which may have been cached for the enclosing section. */ | |
581 | ||
582 | static struct internal_reloc * | |
583 | xcoff_read_internal_relocs (abfd, sec, cache, external_relocs, | |
584 | require_internal, internal_relocs) | |
585 | bfd *abfd; | |
586 | asection *sec; | |
587 | boolean cache; | |
588 | bfd_byte *external_relocs; | |
589 | boolean require_internal; | |
590 | struct internal_reloc *internal_relocs; | |
591 | { | |
592 | if (coff_section_data (abfd, sec) != NULL | |
593 | && coff_section_data (abfd, sec)->relocs == NULL | |
594 | && xcoff_section_data (abfd, sec) != NULL) | |
595 | { | |
596 | asection *enclosing; | |
597 | ||
598 | enclosing = xcoff_section_data (abfd, sec)->enclosing; | |
599 | ||
600 | if (enclosing != NULL | |
601 | && (coff_section_data (abfd, enclosing) == NULL | |
602 | || coff_section_data (abfd, enclosing)->relocs == NULL) | |
603 | && cache) | |
604 | { | |
605 | if (_bfd_coff_read_internal_relocs (abfd, enclosing, true, | |
606 | external_relocs, false, | |
607 | (struct internal_reloc *) NULL) | |
608 | == NULL) | |
609 | return NULL; | |
610 | } | |
aadf04f7 | 611 | |
28a0c103 ILT |
612 | if (enclosing != NULL |
613 | && coff_section_data (abfd, enclosing) != NULL | |
614 | && coff_section_data (abfd, enclosing)->relocs != NULL) | |
615 | { | |
616 | size_t off; | |
617 | ||
618 | off = ((sec->rel_filepos - enclosing->rel_filepos) | |
619 | / bfd_coff_relsz (abfd)); | |
620 | if (! require_internal) | |
621 | return coff_section_data (abfd, enclosing)->relocs + off; | |
622 | memcpy (internal_relocs, | |
623 | coff_section_data (abfd, enclosing)->relocs + off, | |
624 | sec->reloc_count * sizeof (struct internal_reloc)); | |
625 | return internal_relocs; | |
626 | } | |
627 | } | |
628 | ||
629 | return _bfd_coff_read_internal_relocs (abfd, sec, cache, external_relocs, | |
630 | require_internal, internal_relocs); | |
631 | } | |
632 | \f | |
aadf04f7 SS |
633 | /* Given an XCOFF BFD, add symbols to the global hash table as |
634 | appropriate. */ | |
635 | ||
636 | boolean | |
637 | _bfd_xcoff_bfd_link_add_symbols (abfd, info) | |
638 | bfd *abfd; | |
639 | struct bfd_link_info *info; | |
640 | { | |
641 | switch (bfd_get_format (abfd)) | |
642 | { | |
643 | case bfd_object: | |
644 | return xcoff_link_add_object_symbols (abfd, info); | |
645 | case bfd_archive: | |
646 | return (_bfd_generic_link_add_archive_symbols | |
647 | (abfd, info, xcoff_link_check_archive_element)); | |
648 | default: | |
649 | bfd_set_error (bfd_error_wrong_format); | |
650 | return false; | |
651 | } | |
652 | } | |
653 | ||
654 | /* Add symbols from an XCOFF object file. */ | |
655 | ||
656 | static boolean | |
657 | xcoff_link_add_object_symbols (abfd, info) | |
658 | bfd *abfd; | |
659 | struct bfd_link_info *info; | |
660 | { | |
661 | if (! _bfd_coff_get_external_symbols (abfd)) | |
662 | return false; | |
663 | if (! xcoff_link_add_symbols (abfd, info)) | |
664 | return false; | |
665 | if (! info->keep_memory) | |
666 | { | |
667 | if (! _bfd_coff_free_symbols (abfd)) | |
668 | return false; | |
669 | } | |
670 | return true; | |
671 | } | |
672 | ||
673 | /* Check a single archive element to see if we need to include it in | |
674 | the link. *PNEEDED is set according to whether this element is | |
675 | needed in the link or not. This is called via | |
676 | _bfd_generic_link_add_archive_symbols. */ | |
677 | ||
678 | static boolean | |
679 | xcoff_link_check_archive_element (abfd, info, pneeded) | |
680 | bfd *abfd; | |
681 | struct bfd_link_info *info; | |
682 | boolean *pneeded; | |
683 | { | |
684 | if (! _bfd_coff_get_external_symbols (abfd)) | |
685 | return false; | |
686 | ||
687 | if (! xcoff_link_check_ar_symbols (abfd, info, pneeded)) | |
688 | return false; | |
689 | ||
690 | if (*pneeded) | |
691 | { | |
692 | if (! xcoff_link_add_symbols (abfd, info)) | |
693 | return false; | |
694 | } | |
695 | ||
696 | if (! info->keep_memory || ! *pneeded) | |
697 | { | |
698 | if (! _bfd_coff_free_symbols (abfd)) | |
699 | return false; | |
700 | } | |
701 | ||
702 | return true; | |
703 | } | |
704 | ||
705 | /* Look through the symbols to see if this object file should be | |
706 | included in the link. */ | |
707 | ||
708 | static boolean | |
709 | xcoff_link_check_ar_symbols (abfd, info, pneeded) | |
710 | bfd *abfd; | |
711 | struct bfd_link_info *info; | |
712 | boolean *pneeded; | |
713 | { | |
714 | bfd_size_type symesz; | |
715 | bfd_byte *esym; | |
716 | bfd_byte *esym_end; | |
717 | ||
718 | *pneeded = false; | |
719 | ||
720 | symesz = bfd_coff_symesz (abfd); | |
721 | esym = (bfd_byte *) obj_coff_external_syms (abfd); | |
722 | esym_end = esym + obj_raw_syment_count (abfd) * symesz; | |
723 | while (esym < esym_end) | |
724 | { | |
725 | struct internal_syment sym; | |
726 | ||
727 | bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); | |
728 | ||
729 | if (sym.n_sclass == C_EXT && sym.n_scnum != N_UNDEF) | |
730 | { | |
731 | const char *name; | |
732 | char buf[SYMNMLEN + 1]; | |
733 | struct bfd_link_hash_entry *h; | |
734 | ||
735 | /* This symbol is externally visible, and is defined by this | |
736 | object file. */ | |
737 | ||
738 | name = _bfd_coff_internal_syment_name (abfd, &sym, buf); | |
739 | if (name == NULL) | |
740 | return false; | |
741 | h = bfd_link_hash_lookup (info->hash, name, false, false, true); | |
742 | ||
743 | /* We are only interested in symbols that are currently | |
744 | undefined. If a symbol is currently known to be common, | |
745 | XCOFF linkers do not bring in an object file which | |
28a0c103 ILT |
746 | defines it. We also don't bring in symbols to satisfy |
747 | undefined references in shared objects. */ | |
aadf04f7 SS |
748 | if (h != (struct bfd_link_hash_entry *) NULL |
749 | && h->type == bfd_link_hash_undefined) | |
750 | { | |
751 | if (! (*info->callbacks->add_archive_element) (info, abfd, name)) | |
752 | return false; | |
753 | *pneeded = true; | |
754 | return true; | |
755 | } | |
756 | } | |
757 | ||
758 | esym += (sym.n_numaux + 1) * symesz; | |
759 | } | |
760 | ||
761 | /* We do not need this object file. */ | |
762 | return true; | |
763 | } | |
764 | ||
765 | /* Add all the symbols from an object file to the hash table. | |
766 | ||
767 | XCOFF is a weird format. A normal XCOFF .o files will have three | |
768 | COFF sections--.text, .data, and .bss--but each COFF section will | |
769 | contain many csects. These csects are described in the symbol | |
770 | table. From the linker's point of view, each csect must be | |
771 | considered a section in its own right. For example, a TOC entry is | |
772 | handled as a small XMC_TC csect. The linker must be able to merge | |
773 | different TOC entries together, which means that it must be able to | |
774 | extract the XMC_TC csects from the .data section of the input .o | |
775 | file. | |
776 | ||
777 | From the point of view of our linker, this is, of course, a hideous | |
778 | nightmare. We cope by actually creating sections for each csect, | |
779 | and discarding the original sections. We then have to handle the | |
780 | relocation entries carefully, since the only way to tell which | |
781 | csect they belong to is to examine the address. */ | |
782 | ||
783 | static boolean | |
784 | xcoff_link_add_symbols (abfd, info) | |
785 | bfd *abfd; | |
786 | struct bfd_link_info *info; | |
787 | { | |
28a0c103 ILT |
788 | unsigned int n_tmask; |
789 | unsigned int n_btshft; | |
aadf04f7 SS |
790 | boolean default_copy; |
791 | bfd_size_type symcount; | |
792 | struct xcoff_link_hash_entry **sym_hash; | |
793 | asection **csect_cache; | |
28a0c103 | 794 | bfd_size_type linesz; |
aadf04f7 | 795 | asection *sub; |
28a0c103 | 796 | boolean keep_syms; |
aadf04f7 SS |
797 | asection *csect; |
798 | unsigned int csect_index; | |
799 | asection *first_csect; | |
aadf04f7 SS |
800 | bfd_size_type symesz; |
801 | bfd_byte *esym; | |
802 | bfd_byte *esym_end; | |
803 | struct reloc_info_struct | |
804 | { | |
805 | struct internal_reloc *relocs; | |
28a0c103 ILT |
806 | asection **csects; |
807 | bfd_byte *linenos; | |
aadf04f7 SS |
808 | } *reloc_info = NULL; |
809 | ||
28a0c103 ILT |
810 | if ((abfd->flags & DYNAMIC) != 0 |
811 | && ! info->static_link) | |
812 | return xcoff_link_add_dynamic_symbols (abfd, info); | |
813 | ||
814 | n_tmask = coff_data (abfd)->local_n_tmask; | |
815 | n_btshft = coff_data (abfd)->local_n_btshft; | |
816 | ||
817 | /* Define macros so that ISFCN, et. al., macros work correctly. */ | |
818 | #define N_TMASK n_tmask | |
819 | #define N_BTSHFT n_btshft | |
820 | ||
821 | /* We need to build a .loader section, so we do it here. This won't | |
822 | work if we're producing an XCOFF output file with no non dynamic | |
823 | XCOFF input files. FIXME. */ | |
824 | if (xcoff_hash_table (info)->loader_section == NULL) | |
825 | { | |
826 | asection *lsec; | |
827 | ||
828 | lsec = bfd_make_section_anyway (abfd, ".loader"); | |
829 | if (lsec == NULL) | |
830 | goto error_return; | |
831 | xcoff_hash_table (info)->loader_section = lsec; | |
832 | lsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
833 | } | |
834 | /* Likewise for the linkage section. */ | |
835 | if (xcoff_hash_table (info)->linkage_section == NULL) | |
836 | { | |
837 | asection *lsec; | |
838 | ||
839 | lsec = bfd_make_section_anyway (abfd, ".gl"); | |
840 | if (lsec == NULL) | |
841 | goto error_return; | |
842 | xcoff_hash_table (info)->linkage_section = lsec; | |
843 | lsec->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
844 | } | |
845 | /* Likewise for the TOC section. */ | |
846 | if (xcoff_hash_table (info)->toc_section == NULL) | |
847 | { | |
848 | asection *tsec; | |
849 | ||
850 | tsec = bfd_make_section_anyway (abfd, ".tc"); | |
851 | if (tsec == NULL) | |
852 | goto error_return; | |
853 | xcoff_hash_table (info)->toc_section = tsec; | |
854 | tsec->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
855 | } | |
856 | /* Likewise for the .debug section. */ | |
857 | if (xcoff_hash_table (info)->debug_section == NULL) | |
858 | { | |
859 | asection *dsec; | |
860 | ||
861 | dsec = bfd_make_section_anyway (abfd, ".debug"); | |
862 | if (dsec == NULL) | |
863 | goto error_return; | |
864 | xcoff_hash_table (info)->debug_section = dsec; | |
865 | dsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
866 | } | |
867 | ||
aadf04f7 SS |
868 | if (info->keep_memory) |
869 | default_copy = false; | |
870 | else | |
871 | default_copy = true; | |
872 | ||
873 | symcount = obj_raw_syment_count (abfd); | |
874 | ||
875 | /* We keep a list of the linker hash table entries that correspond | |
876 | to each external symbol. */ | |
877 | sym_hash = ((struct xcoff_link_hash_entry **) | |
878 | bfd_alloc (abfd, | |
879 | (symcount | |
880 | * sizeof (struct xcoff_link_hash_entry *)))); | |
881 | if (sym_hash == NULL && symcount != 0) | |
882 | { | |
883 | bfd_set_error (bfd_error_no_memory); | |
884 | goto error_return; | |
885 | } | |
886 | coff_data (abfd)->sym_hashes = (struct coff_link_hash_entry **) sym_hash; | |
887 | memset (sym_hash, 0, | |
888 | (size_t) symcount * sizeof (struct xcoff_link_hash_entry *)); | |
889 | ||
890 | /* Because of the weird stuff we are doing with XCOFF csects, we can | |
891 | not easily determine which section a symbol is in, so we store | |
892 | the information in the tdata for the input file. */ | |
893 | csect_cache = ((asection **) | |
894 | bfd_alloc (abfd, symcount * sizeof (asection *))); | |
895 | if (csect_cache == NULL && symcount != 0) | |
896 | { | |
897 | bfd_set_error (bfd_error_no_memory); | |
898 | goto error_return; | |
899 | } | |
900 | xcoff_data (abfd)->csects = csect_cache; | |
901 | memset (csect_cache, 0, (size_t) symcount * sizeof (asection *)); | |
902 | ||
aadf04f7 SS |
903 | /* While splitting sections into csects, we need to assign the |
904 | relocs correctly. The relocs and the csects must both be in | |
905 | order by VMA within a given section, so we handle this by | |
906 | scanning along the relocs as we process the csects. We index | |
907 | into reloc_info using the section target_index. */ | |
908 | reloc_info = ((struct reloc_info_struct *) | |
909 | malloc ((abfd->section_count + 1) | |
910 | * sizeof (struct reloc_info_struct))); | |
911 | if (reloc_info == NULL) | |
912 | { | |
913 | bfd_set_error (bfd_error_no_memory); | |
914 | goto error_return; | |
915 | } | |
916 | memset ((PTR) reloc_info, 0, | |
917 | (abfd->section_count + 1) * sizeof (struct reloc_info_struct)); | |
918 | ||
28a0c103 ILT |
919 | /* Read in the relocs and line numbers for each section. */ |
920 | linesz = bfd_coff_linesz (abfd); | |
aadf04f7 SS |
921 | for (sub = abfd->sections; sub != NULL; sub = sub->next) |
922 | { | |
923 | if ((sub->flags & SEC_RELOC) != 0) | |
924 | { | |
925 | reloc_info[sub->target_index].relocs = | |
28a0c103 ILT |
926 | xcoff_read_internal_relocs (abfd, sub, true, (bfd_byte *) NULL, |
927 | false, (struct internal_reloc *) NULL); | |
928 | reloc_info[sub->target_index].csects = | |
929 | (asection **) malloc (sub->reloc_count * sizeof (asection *)); | |
930 | if (reloc_info[sub->target_index].csects == NULL) | |
931 | { | |
932 | bfd_set_error (bfd_error_no_memory); | |
933 | goto error_return; | |
934 | } | |
935 | memset (reloc_info[sub->target_index].csects, 0, | |
936 | sub->reloc_count * sizeof (asection *)); | |
937 | } | |
938 | ||
939 | if ((info->strip == strip_none || info->strip == strip_some) | |
940 | && sub->lineno_count > 0) | |
941 | { | |
942 | bfd_byte *linenos; | |
943 | ||
944 | linenos = (bfd_byte *) malloc (sub->lineno_count * linesz); | |
945 | if (linenos == NULL) | |
aadf04f7 SS |
946 | { |
947 | bfd_set_error (bfd_error_no_memory); | |
948 | goto error_return; | |
949 | } | |
28a0c103 ILT |
950 | reloc_info[sub->target_index].linenos = linenos; |
951 | if (bfd_seek (abfd, sub->line_filepos, SEEK_SET) != 0 | |
952 | || (bfd_read (linenos, linesz, sub->lineno_count, abfd) | |
953 | != linesz * sub->lineno_count)) | |
954 | goto error_return; | |
aadf04f7 SS |
955 | } |
956 | } | |
957 | ||
28a0c103 ILT |
958 | /* Don't let the linker relocation routines discard the symbols. */ |
959 | keep_syms = obj_coff_keep_syms (abfd); | |
960 | obj_coff_keep_syms (abfd) = true; | |
961 | ||
aadf04f7 SS |
962 | csect = NULL; |
963 | csect_index = 0; | |
964 | first_csect = NULL; | |
aadf04f7 SS |
965 | |
966 | symesz = bfd_coff_symesz (abfd); | |
967 | BFD_ASSERT (symesz == bfd_coff_auxesz (abfd)); | |
968 | esym = (bfd_byte *) obj_coff_external_syms (abfd); | |
969 | esym_end = esym + symcount * symesz; | |
970 | while (esym < esym_end) | |
971 | { | |
972 | struct internal_syment sym; | |
973 | union internal_auxent aux; | |
28a0c103 | 974 | const char *name; |
aadf04f7 SS |
975 | char buf[SYMNMLEN + 1]; |
976 | int smtyp; | |
977 | flagword flags; | |
978 | asection *section; | |
979 | bfd_vma value; | |
28a0c103 | 980 | struct xcoff_link_hash_entry *set_toc; |
aadf04f7 SS |
981 | |
982 | bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); | |
983 | ||
aadf04f7 SS |
984 | /* In this pass we are only interested in symbols with csect |
985 | information. */ | |
986 | if (sym.n_sclass != C_EXT && sym.n_sclass != C_HIDEXT) | |
987 | { | |
28a0c103 ILT |
988 | if (sym.n_sclass == C_FILE && csect != NULL) |
989 | { | |
990 | xcoff_section_data (abfd, csect)->last_symndx = | |
991 | ((esym | |
992 | - (bfd_byte *) obj_coff_external_syms (abfd)) | |
993 | / symesz); | |
994 | csect = NULL; | |
995 | } | |
996 | ||
aadf04f7 SS |
997 | if (csect != NULL) |
998 | *csect_cache = csect; | |
28a0c103 | 999 | else if (first_csect == NULL || sym.n_sclass == C_FILE) |
aadf04f7 SS |
1000 | *csect_cache = coff_section_from_bfd_index (abfd, sym.n_scnum); |
1001 | else | |
1002 | *csect_cache = NULL; | |
1003 | esym += (sym.n_numaux + 1) * symesz; | |
1004 | sym_hash += sym.n_numaux + 1; | |
1005 | csect_cache += sym.n_numaux + 1; | |
aadf04f7 SS |
1006 | continue; |
1007 | } | |
1008 | ||
1009 | name = _bfd_coff_internal_syment_name (abfd, &sym, buf); | |
1010 | if (name == NULL) | |
1011 | goto error_return; | |
1012 | ||
28a0c103 ILT |
1013 | /* If this symbol has line number information attached to it, |
1014 | and we're not stripping it, count the number of entries and | |
1015 | add them to the count for this csect. In the final link pass | |
1016 | we are going to attach line number information by symbol, | |
1017 | rather than by section, in order to more easily handle | |
1018 | garbage collection. */ | |
1019 | if ((info->strip == strip_none || info->strip == strip_some) | |
1020 | && sym.n_numaux > 1 | |
1021 | && csect != NULL | |
1022 | && ISFCN (sym.n_type)) | |
1023 | { | |
1024 | union internal_auxent auxlin; | |
1025 | ||
1026 | bfd_coff_swap_aux_in (abfd, (PTR) (esym + symesz), | |
1027 | sym.n_type, sym.n_sclass, | |
1028 | 0, sym.n_numaux, (PTR) &auxlin); | |
1029 | if (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0) | |
1030 | { | |
1031 | asection *enclosing; | |
1032 | bfd_size_type linoff; | |
1033 | ||
1034 | enclosing = xcoff_section_data (abfd, csect)->enclosing; | |
b73322d9 ILT |
1035 | if (enclosing == NULL) |
1036 | { | |
1037 | (*_bfd_error_handler) | |
1038 | ("%s: `%s' has line numbers but no enclosing section", | |
1039 | bfd_get_filename (abfd), name); | |
1040 | bfd_set_error (bfd_error_bad_value); | |
1041 | goto error_return; | |
1042 | } | |
28a0c103 ILT |
1043 | linoff = (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr |
1044 | - enclosing->line_filepos); | |
1045 | if (linoff < enclosing->lineno_count * linesz) | |
1046 | { | |
1047 | struct internal_lineno lin; | |
1048 | bfd_byte *linpstart; | |
1049 | ||
1050 | linpstart = (reloc_info[enclosing->target_index].linenos | |
1051 | + linoff); | |
1052 | bfd_coff_swap_lineno_in (abfd, (PTR) linpstart, (PTR) &lin); | |
1053 | if (lin.l_lnno == 0 | |
1054 | && ((bfd_size_type) lin.l_addr.l_symndx | |
1055 | == ((esym | |
1056 | - (bfd_byte *) obj_coff_external_syms (abfd)) | |
1057 | / symesz))) | |
1058 | { | |
1059 | bfd_byte *linpend, *linp; | |
1060 | ||
1061 | linpend = (reloc_info[enclosing->target_index].linenos | |
1062 | + enclosing->lineno_count * linesz); | |
1063 | for (linp = linpstart + linesz; | |
1064 | linp < linpend; | |
1065 | linp += linesz) | |
1066 | { | |
1067 | bfd_coff_swap_lineno_in (abfd, (PTR) linp, | |
1068 | (PTR) &lin); | |
1069 | if (lin.l_lnno == 0) | |
1070 | break; | |
1071 | } | |
1072 | csect->lineno_count += (linp - linpstart) / linesz; | |
f78195df ILT |
1073 | /* The setting of line_filepos will only be |
1074 | useful if all the line number entries for a | |
1075 | csect are contiguous; this only matters for | |
1076 | error reporting. */ | |
1077 | if (csect->line_filepos == 0) | |
1078 | csect->line_filepos = | |
1079 | auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr; | |
28a0c103 ILT |
1080 | } |
1081 | } | |
1082 | } | |
1083 | } | |
1084 | ||
aadf04f7 SS |
1085 | /* Pick up the csect auxiliary information. */ |
1086 | ||
1087 | if (sym.n_numaux == 0) | |
1088 | { | |
1089 | (*_bfd_error_handler) | |
1090 | ("%s: class %d symbol `%s' has no aux entries", | |
1091 | bfd_get_filename (abfd), sym.n_sclass, name); | |
1092 | bfd_set_error (bfd_error_bad_value); | |
1093 | goto error_return; | |
1094 | } | |
1095 | ||
1096 | bfd_coff_swap_aux_in (abfd, | |
1097 | (PTR) (esym + symesz * sym.n_numaux), | |
1098 | sym.n_type, sym.n_sclass, | |
1099 | sym.n_numaux - 1, sym.n_numaux, | |
1100 | (PTR) &aux); | |
1101 | ||
1102 | smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp); | |
1103 | ||
1104 | flags = BSF_GLOBAL; | |
1105 | section = NULL; | |
1106 | value = 0; | |
28a0c103 | 1107 | set_toc = NULL; |
aadf04f7 SS |
1108 | |
1109 | switch (smtyp) | |
1110 | { | |
1111 | default: | |
1112 | (*_bfd_error_handler) | |
1113 | ("%s: symbol `%s' has unrecognized csect type %d", | |
1114 | bfd_get_filename (abfd), name, smtyp); | |
1115 | bfd_set_error (bfd_error_bad_value); | |
1116 | goto error_return; | |
1117 | ||
1118 | case XTY_ER: | |
1119 | /* This is an external reference. */ | |
1120 | if (sym.n_sclass == C_HIDEXT | |
1121 | || sym.n_scnum != N_UNDEF | |
1122 | || aux.x_csect.x_scnlen.l != 0) | |
1123 | { | |
1124 | (*_bfd_error_handler) | |
1125 | ("%s: bad XTY_ER symbol `%s': class %d scnum %d scnlen %d", | |
1126 | bfd_get_filename (abfd), name, sym.n_sclass, sym.n_scnum, | |
1127 | aux.x_csect.x_scnlen.l); | |
1128 | bfd_set_error (bfd_error_bad_value); | |
1129 | goto error_return; | |
1130 | } | |
1131 | section = bfd_und_section_ptr; | |
1132 | break; | |
1133 | ||
1134 | case XTY_SD: | |
1135 | /* This is a csect definition. */ | |
1136 | ||
28a0c103 ILT |
1137 | if (csect != NULL) |
1138 | { | |
1139 | xcoff_section_data (abfd, csect)->last_symndx = | |
1140 | ((esym | |
1141 | - (bfd_byte *) obj_coff_external_syms (abfd)) | |
1142 | / symesz); | |
1143 | } | |
1144 | ||
aadf04f7 SS |
1145 | csect = NULL; |
1146 | csect_index = -1; | |
1147 | ||
1148 | /* When we see a TOC anchor, we record the TOC value. */ | |
1149 | if (aux.x_csect.x_smclas == XMC_TC0) | |
1150 | { | |
1151 | if (sym.n_sclass != C_HIDEXT | |
1152 | || aux.x_csect.x_scnlen.l != 0) | |
1153 | { | |
1154 | (*_bfd_error_handler) | |
1155 | ("%s: XMC_TC0 symbol `%s' is class %d scnlen %d", | |
1156 | bfd_get_filename (abfd), name, sym.n_sclass, | |
1157 | aux.x_csect.x_scnlen.l); | |
1158 | bfd_set_error (bfd_error_bad_value); | |
1159 | goto error_return; | |
1160 | } | |
1161 | xcoff_data (abfd)->toc = sym.n_value; | |
1162 | } | |
1163 | ||
1164 | /* We must merge TOC entries for the same symbol. We can | |
1165 | merge two TOC entries if they are both C_HIDEXT, they | |
1166 | both have the same name, they are both 4 bytes long, and | |
1167 | they both have a relocation table entry for an external | |
1168 | symbol with the same name. Unfortunately, this means | |
1169 | that we must look through the relocations. Ick. */ | |
1170 | if (aux.x_csect.x_smclas == XMC_TC | |
1171 | && sym.n_sclass == C_HIDEXT | |
28a0c103 ILT |
1172 | && aux.x_csect.x_scnlen.l == 4 |
1173 | && info->hash->creator == abfd->xvec) | |
aadf04f7 SS |
1174 | { |
1175 | asection *enclosing; | |
1176 | bfd_size_type relindx; | |
1177 | struct internal_reloc *rel; | |
28a0c103 | 1178 | asection **rel_csect; |
aadf04f7 SS |
1179 | |
1180 | enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum); | |
1181 | if (enclosing == NULL) | |
28a0c103 | 1182 | goto error_return; |
aadf04f7 SS |
1183 | |
1184 | /* XCOFF requires that relocs be sorted by address, so | |
1185 | we could do a binary search here. FIXME. */ | |
1186 | rel = reloc_info[enclosing->target_index].relocs; | |
28a0c103 | 1187 | rel_csect = reloc_info[enclosing->target_index].csects; |
aadf04f7 SS |
1188 | for (relindx = 0; |
1189 | relindx < enclosing->reloc_count; | |
28a0c103 | 1190 | relindx++, rel++, rel_csect++) |
aadf04f7 | 1191 | { |
28a0c103 | 1192 | if (*rel_csect == NULL |
aadf04f7 SS |
1193 | && rel->r_vaddr == (bfd_vma) sym.n_value |
1194 | && rel->r_size == 31 | |
28a0c103 | 1195 | && rel->r_type == R_POS) |
aadf04f7 SS |
1196 | break; |
1197 | } | |
1198 | if (relindx < enclosing->reloc_count) | |
1199 | { | |
1200 | bfd_byte *erelsym; | |
1201 | struct internal_syment relsym; | |
1202 | ||
1203 | erelsym = ((bfd_byte *) obj_coff_external_syms (abfd) | |
1204 | + rel->r_symndx * symesz); | |
1205 | bfd_coff_swap_sym_in (abfd, (PTR) erelsym, (PTR) &relsym); | |
1206 | if (relsym.n_sclass == C_EXT) | |
1207 | { | |
1208 | const char *relname; | |
1209 | char relbuf[SYMNMLEN + 1]; | |
1210 | boolean copy; | |
1211 | struct xcoff_link_hash_entry *h; | |
1212 | ||
1213 | /* At this point we know that the TOC entry is | |
1214 | for an externally visible symbol. */ | |
1215 | relname = _bfd_coff_internal_syment_name (abfd, &relsym, | |
1216 | relbuf); | |
1217 | if (relname == NULL) | |
28a0c103 | 1218 | goto error_return; |
aadf04f7 SS |
1219 | copy = (! info->keep_memory |
1220 | || relsym._n._n_n._n_zeroes != 0 | |
1221 | || relsym._n._n_n._n_offset == 0); | |
1222 | h = xcoff_link_hash_lookup (xcoff_hash_table (info), | |
1223 | relname, true, copy, false); | |
1224 | if (h == NULL) | |
28a0c103 | 1225 | goto error_return; |
aadf04f7 SS |
1226 | |
1227 | /* At this point h->root.type could be | |
1228 | bfd_link_hash_new. That should be OK, since | |
1229 | we know for sure that we will come across | |
1230 | this symbol as we step through the file. */ | |
1231 | ||
28a0c103 ILT |
1232 | /* We store h in *sym_hash for the convenience |
1233 | of the relocate_section function. */ | |
aadf04f7 SS |
1234 | *sym_hash = h; |
1235 | ||
28a0c103 | 1236 | if (h->toc_section != NULL) |
aadf04f7 SS |
1237 | { |
1238 | /* We already have a TOC entry for this | |
28a0c103 ILT |
1239 | symbol, so we can just ignore this one. */ |
1240 | *rel_csect = bfd_und_section_ptr; | |
aadf04f7 SS |
1241 | break; |
1242 | } | |
1243 | ||
1244 | /* We are about to create a TOC entry for this | |
1245 | symbol. */ | |
28a0c103 | 1246 | set_toc = h; |
aadf04f7 SS |
1247 | } |
1248 | } | |
1249 | } | |
1250 | ||
1251 | /* We need to create a new section. We get the name from | |
1252 | the csect storage mapping class, so that the linker can | |
1253 | accumulate similar csects together. */ | |
1254 | { | |
1255 | static const char *csect_name_by_class[] = | |
1256 | { | |
1257 | ".pr", ".ro", ".db", ".tc", ".ua", ".rw", ".gl", ".xo", | |
1258 | ".sv", ".bs", ".ds", ".uc", ".ti", ".tb", NULL, ".tc0", | |
1259 | ".td" | |
1260 | }; | |
1261 | const char *csect_name; | |
1262 | asection *enclosing; | |
1263 | struct internal_reloc *rel; | |
1264 | bfd_size_type relindx; | |
28a0c103 | 1265 | asection **rel_csect; |
aadf04f7 SS |
1266 | |
1267 | if ((aux.x_csect.x_smclas >= | |
1268 | sizeof csect_name_by_class / sizeof csect_name_by_class[0]) | |
1269 | || csect_name_by_class[aux.x_csect.x_smclas] == NULL) | |
1270 | { | |
1271 | (*_bfd_error_handler) | |
1272 | ("%s: symbol `%s' has unrecognized smclas %d", | |
1273 | bfd_get_filename (abfd), name, aux.x_csect.x_smclas); | |
1274 | bfd_set_error (bfd_error_bad_value); | |
1275 | goto error_return; | |
1276 | } | |
1277 | ||
1278 | csect_name = csect_name_by_class[aux.x_csect.x_smclas]; | |
1279 | csect = bfd_make_section_anyway (abfd, csect_name); | |
1280 | if (csect == NULL) | |
1281 | goto error_return; | |
1282 | enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum); | |
1283 | if (enclosing == NULL) | |
1284 | goto error_return; | |
1285 | if ((bfd_vma) sym.n_value < enclosing->vma | |
1286 | || ((bfd_vma) sym.n_value + aux.x_csect.x_scnlen.l | |
1287 | > enclosing->vma + enclosing->_raw_size)) | |
1288 | { | |
1289 | (*_bfd_error_handler) | |
1290 | ("%s: csect `%s' not in enclosing section", | |
1291 | bfd_get_filename (abfd), name); | |
1292 | bfd_set_error (bfd_error_bad_value); | |
1293 | goto error_return; | |
1294 | } | |
1295 | csect->vma = sym.n_value; | |
1296 | csect->filepos = (enclosing->filepos | |
1297 | + sym.n_value | |
1298 | - enclosing->vma); | |
1299 | csect->_raw_size = aux.x_csect.x_scnlen.l; | |
1300 | csect->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; | |
1301 | csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp); | |
1302 | ||
28a0c103 ILT |
1303 | /* Record the enclosing section in the tdata for this new |
1304 | section. */ | |
1305 | csect->used_by_bfd = | |
1306 | ((struct coff_section_tdata *) | |
1307 | bfd_zalloc (abfd, sizeof (struct coff_section_tdata))); | |
1308 | if (csect->used_by_bfd == NULL) | |
1309 | { | |
1310 | bfd_set_error (bfd_error_no_memory); | |
1311 | goto error_return; | |
1312 | } | |
1313 | coff_section_data (abfd, csect)->tdata = | |
1314 | bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata)); | |
1315 | if (coff_section_data (abfd, csect)->tdata == NULL) | |
1316 | { | |
1317 | bfd_set_error (bfd_error_no_memory); | |
1318 | goto error_return; | |
1319 | } | |
1320 | xcoff_section_data (abfd, csect)->enclosing = enclosing; | |
b73322d9 ILT |
1321 | xcoff_section_data (abfd, csect)->lineno_count = |
1322 | enclosing->lineno_count; | |
28a0c103 | 1323 | |
aadf04f7 SS |
1324 | /* XCOFF requires that relocs be sorted by address, so we |
1325 | could do a binary search here. FIXME. (XCOFF | |
1326 | unfortunately does not require that symbols be sorted | |
1327 | by address, or this would be a simple merge). */ | |
1328 | rel = reloc_info[enclosing->target_index].relocs; | |
28a0c103 | 1329 | rel_csect = reloc_info[enclosing->target_index].csects; |
aadf04f7 SS |
1330 | for (relindx = 0; |
1331 | relindx < enclosing->reloc_count; | |
28a0c103 | 1332 | relindx++, rel++, rel_csect++) |
aadf04f7 | 1333 | { |
28a0c103 | 1334 | if (*rel_csect == NULL |
aadf04f7 SS |
1335 | && rel->r_vaddr >= csect->vma |
1336 | && rel->r_vaddr < csect->vma + csect->_raw_size) | |
1337 | { | |
1338 | csect->rel_filepos = (enclosing->rel_filepos | |
1339 | + relindx * bfd_coff_relsz (abfd)); | |
1340 | break; | |
1341 | } | |
1342 | } | |
1343 | while (relindx < enclosing->reloc_count | |
28a0c103 | 1344 | && *rel_csect == NULL |
aadf04f7 SS |
1345 | && rel->r_vaddr >= csect->vma |
1346 | && rel->r_vaddr < csect->vma + csect->_raw_size) | |
1347 | { | |
28a0c103 | 1348 | *rel_csect = csect; |
aadf04f7 SS |
1349 | csect->flags |= SEC_RELOC; |
1350 | ++csect->reloc_count; | |
1351 | ++relindx; | |
1352 | ++rel; | |
28a0c103 | 1353 | ++rel_csect; |
aadf04f7 SS |
1354 | } |
1355 | ||
1356 | /* There are a number of other fields and section flags | |
1357 | which we do not bother to set. */ | |
1358 | ||
aadf04f7 SS |
1359 | csect_index = ((esym |
1360 | - (bfd_byte *) obj_coff_external_syms (abfd)) | |
1361 | / symesz); | |
1362 | ||
28a0c103 ILT |
1363 | xcoff_section_data (abfd, csect)->first_symndx = csect_index; |
1364 | ||
aadf04f7 SS |
1365 | if (first_csect == NULL) |
1366 | first_csect = csect; | |
1367 | ||
1368 | /* If this symbol is C_EXT, we treat it as starting at the | |
1369 | beginning of the newly created section. */ | |
1370 | if (sym.n_sclass == C_EXT) | |
1371 | { | |
1372 | section = csect; | |
1373 | value = 0; | |
1374 | } | |
28a0c103 ILT |
1375 | |
1376 | /* If this is a TOC section for a symbol, record it. */ | |
1377 | if (set_toc != NULL) | |
1378 | { | |
1379 | set_toc->toc_section = csect; | |
1380 | set_toc->toc_offset = 0; | |
1381 | } | |
aadf04f7 SS |
1382 | } |
1383 | break; | |
1384 | ||
1385 | case XTY_LD: | |
1386 | /* This is a label definition. The x_scnlen field is the | |
1387 | symbol index of the csect. I believe that this must | |
1388 | always follow the appropriate XTY_SD symbol, so I will | |
1389 | insist on it. */ | |
1390 | { | |
1391 | boolean bad; | |
1392 | ||
1393 | bad = false; | |
28a0c103 | 1394 | if (aux.x_csect.x_scnlen.l < 0 |
aadf04f7 SS |
1395 | || (aux.x_csect.x_scnlen.l |
1396 | >= esym - (bfd_byte *) obj_coff_external_syms (abfd))) | |
1397 | bad = true; | |
1398 | if (! bad) | |
1399 | { | |
1400 | section = xcoff_data (abfd)->csects[aux.x_csect.x_scnlen.l]; | |
1401 | if (section == NULL | |
1402 | || (section->flags & SEC_HAS_CONTENTS) == 0) | |
1403 | bad = true; | |
1404 | } | |
1405 | if (bad) | |
1406 | { | |
1407 | (*_bfd_error_handler) | |
1408 | ("%s: misplaced XTY_LD `%s'", | |
1409 | bfd_get_filename (abfd), name); | |
1410 | bfd_set_error (bfd_error_bad_value); | |
1411 | goto error_return; | |
1412 | } | |
1413 | ||
1414 | value = sym.n_value - csect->vma; | |
1415 | } | |
1416 | break; | |
1417 | ||
1418 | case XTY_CM: | |
1419 | /* This is an unitialized csect. We could base the name on | |
1420 | the storage mapping class, but we don't bother. If this | |
1421 | csect is externally visible, it is a common symbol. */ | |
28a0c103 ILT |
1422 | |
1423 | if (csect != NULL) | |
aadf04f7 | 1424 | { |
28a0c103 ILT |
1425 | xcoff_section_data (abfd, csect)->last_symndx = |
1426 | ((esym | |
1427 | - (bfd_byte *) obj_coff_external_syms (abfd)) | |
1428 | / symesz); | |
aadf04f7 | 1429 | } |
28a0c103 ILT |
1430 | |
1431 | csect = bfd_make_section_anyway (abfd, ".bss"); | |
1432 | if (csect == NULL) | |
1433 | goto error_return; | |
1434 | csect->vma = 0; | |
1435 | csect->_raw_size = aux.x_csect.x_scnlen.l; | |
1436 | csect->flags |= SEC_ALLOC; | |
1437 | csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp); | |
1438 | /* There are a number of other fields and section flags | |
1439 | which we do not bother to set. */ | |
1440 | ||
1441 | csect_index = ((esym | |
1442 | - (bfd_byte *) obj_coff_external_syms (abfd)) | |
1443 | / symesz); | |
1444 | ||
1445 | csect->used_by_bfd = | |
1446 | ((struct coff_section_tdata *) | |
1447 | bfd_zalloc (abfd, sizeof (struct coff_section_tdata))); | |
1448 | if (csect->used_by_bfd == NULL) | |
aadf04f7 | 1449 | { |
28a0c103 ILT |
1450 | bfd_set_error (bfd_error_no_memory); |
1451 | goto error_return; | |
1452 | } | |
1453 | coff_section_data (abfd, csect)->tdata = | |
1454 | bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata)); | |
1455 | if (coff_section_data (abfd, csect)->tdata == NULL) | |
1456 | { | |
1457 | bfd_set_error (bfd_error_no_memory); | |
1458 | goto error_return; | |
1459 | } | |
1460 | xcoff_section_data (abfd, csect)->first_symndx = csect_index; | |
1461 | ||
1462 | if (first_csect == NULL) | |
1463 | first_csect = csect; | |
1464 | ||
1465 | if (sym.n_sclass == C_EXT) | |
1466 | { | |
1467 | csect->flags |= SEC_IS_COMMON; | |
1468 | section = csect; | |
1469 | value = aux.x_csect.x_scnlen.l; | |
aadf04f7 | 1470 | } |
28a0c103 | 1471 | |
aadf04f7 SS |
1472 | break; |
1473 | } | |
1474 | ||
1475 | /* Now we have enough information to add the symbol to the | |
1476 | linker hash table. */ | |
1477 | ||
1478 | if (sym.n_sclass == C_EXT) | |
1479 | { | |
1480 | boolean copy; | |
1481 | ||
1482 | BFD_ASSERT (section != NULL); | |
1483 | ||
1484 | /* We must copy the name into memory if we got it from the | |
1485 | syment itself, rather than the string table. */ | |
1486 | copy = default_copy; | |
1487 | if (sym._n._n_n._n_zeroes != 0 | |
1488 | || sym._n._n_n._n_offset == 0) | |
1489 | copy = true; | |
1490 | ||
28a0c103 ILT |
1491 | if (info->hash->creator == abfd->xvec) |
1492 | { | |
1493 | /* If we are statically linking a shared object, it is | |
1494 | OK for symbol redefinitions to occur. I can't figure | |
1495 | out just what the XCOFF linker is doing, but | |
1496 | something like this is required for -bnso to work. */ | |
1497 | *sym_hash = xcoff_link_hash_lookup (xcoff_hash_table (info), | |
1498 | name, true, copy, false); | |
1499 | if (*sym_hash == NULL) | |
1500 | goto error_return; | |
1501 | if (((*sym_hash)->root.type == bfd_link_hash_defined | |
1502 | || (*sym_hash)->root.type == bfd_link_hash_defweak) | |
1503 | && ! bfd_is_und_section (section) | |
1504 | && ! bfd_is_com_section (section)) | |
1505 | { | |
1506 | if ((abfd->flags & DYNAMIC) != 0) | |
1507 | { | |
1508 | section = bfd_und_section_ptr; | |
1509 | value = 0; | |
1510 | } | |
1511 | else if (((*sym_hash)->root.u.def.section->owner->flags | |
1512 | & DYNAMIC) != 0) | |
1513 | { | |
1514 | (*sym_hash)->root.type = bfd_link_hash_undefined; | |
1515 | (*sym_hash)->root.u.undef.abfd = | |
1516 | (*sym_hash)->root.u.def.section->owner; | |
1517 | } | |
1518 | } | |
1519 | } | |
1520 | ||
aadf04f7 SS |
1521 | if (! (_bfd_generic_link_add_one_symbol |
1522 | (info, abfd, name, flags, section, value, | |
1523 | (const char *) NULL, copy, false, | |
1524 | (struct bfd_link_hash_entry **) sym_hash))) | |
1525 | goto error_return; | |
1526 | ||
1527 | if (info->hash->creator == abfd->xvec) | |
28a0c103 ILT |
1528 | { |
1529 | int flag; | |
1530 | ||
1531 | if (smtyp == XTY_ER || smtyp == XTY_CM) | |
1532 | flag = XCOFF_REF_REGULAR; | |
1533 | else | |
1534 | flag = XCOFF_DEF_REGULAR; | |
1535 | (*sym_hash)->flags |= flag; | |
1536 | ||
1537 | if ((*sym_hash)->smclas == XMC_UA) | |
1538 | (*sym_hash)->smclas = aux.x_csect.x_smclas; | |
1539 | } | |
aadf04f7 SS |
1540 | } |
1541 | ||
1542 | *csect_cache = csect; | |
1543 | ||
1544 | esym += (sym.n_numaux + 1) * symesz; | |
1545 | sym_hash += sym.n_numaux + 1; | |
1546 | csect_cache += sym.n_numaux + 1; | |
aadf04f7 SS |
1547 | } |
1548 | ||
28a0c103 ILT |
1549 | /* Make sure that we have seen all the relocs. */ |
1550 | for (sub = abfd->sections; sub != first_csect; sub = sub->next) | |
aadf04f7 | 1551 | { |
28a0c103 ILT |
1552 | /* Reset the section size, since the data is now attached to the |
1553 | csects. Don't reset the size of the .debug section, since we | |
1554 | need to read it below in bfd_xcoff_size_dynamic_sections. */ | |
1555 | if (strcmp (bfd_get_section_name (abfd, sub), ".debug") != 0) | |
1556 | sub->_raw_size = 0; | |
aadf04f7 SS |
1557 | |
1558 | if ((sub->flags & SEC_RELOC) != 0) | |
1559 | { | |
1560 | bfd_size_type i; | |
28a0c103 ILT |
1561 | struct internal_reloc *rel; |
1562 | asection **rel_csect; | |
aadf04f7 | 1563 | |
28a0c103 ILT |
1564 | rel = reloc_info[sub->target_index].relocs; |
1565 | rel_csect = reloc_info[sub->target_index].csects; | |
1566 | for (i = 0; i < sub->reloc_count; i++, rel++, rel_csect++) | |
aadf04f7 | 1567 | { |
28a0c103 | 1568 | if (*rel_csect == NULL) |
aadf04f7 SS |
1569 | { |
1570 | (*_bfd_error_handler) | |
1571 | ("%s: reloc %s:%d not in csect", | |
1572 | bfd_get_filename (abfd), sub->name, i); | |
1573 | bfd_set_error (bfd_error_bad_value); | |
1574 | goto error_return; | |
1575 | } | |
28a0c103 ILT |
1576 | |
1577 | /* We need to copy all relocs which are not PC relative | |
1578 | and not TOC relative into the .loader section. | |
1579 | ||
1580 | We also identify all symbols which are called, so | |
1581 | that we can create glue code for calls to functions | |
1582 | imported from dynamic objects. */ | |
1583 | ||
1584 | if (info->hash->creator == abfd->xvec | |
1585 | && *rel_csect != bfd_und_section_ptr) | |
1586 | { | |
1587 | struct xcoff_link_hash_entry *h; | |
1588 | ||
1589 | switch (rel->r_type) | |
1590 | { | |
1591 | default: | |
1592 | break; | |
1593 | case R_POS: | |
1594 | case R_NEG: | |
1595 | case R_RL: | |
1596 | case R_RLA: | |
1597 | ++xcoff_hash_table (info)->ldrel_count; | |
1598 | ++xcoff_section_data (abfd, *rel_csect)->ldrel_count; | |
1599 | h = obj_xcoff_sym_hashes (abfd)[rel->r_symndx]; | |
1600 | if (h != NULL) | |
1601 | h->flags |= XCOFF_LDREL; | |
1602 | break; | |
1603 | case R_BR: | |
1604 | case R_RBR: | |
1605 | h = obj_xcoff_sym_hashes (abfd)[rel->r_symndx]; | |
1606 | if (h != NULL) | |
1607 | { | |
1608 | h->flags |= XCOFF_CALLED; | |
1609 | /* If the symbol name starts with a period, | |
1610 | it is the code of a function. If the | |
1611 | symbol is currently undefined, then add | |
1612 | an undefined symbol for the function | |
1613 | descriptor. This should do no harm, | |
1614 | because any regular object that defines | |
1615 | the function should also define the | |
1616 | function descriptor. It helps, because | |
1617 | it means that we will identify the | |
1618 | function descriptor with a dynamic object | |
1619 | if a dynamic object defines it. */ | |
1620 | if (h->root.root.string[0] == '.' | |
1621 | && h->descriptor == NULL) | |
1622 | { | |
1623 | struct xcoff_link_hash_entry *hds; | |
1624 | ||
1625 | hds = (xcoff_link_hash_lookup | |
1626 | (xcoff_hash_table (info), | |
1627 | h->root.root.string + 1, true, false, | |
1628 | true)); | |
1629 | if (hds == NULL) | |
1630 | goto error_return; | |
1631 | if (hds->root.type == bfd_link_hash_new) | |
1632 | { | |
1633 | if (! (_bfd_generic_link_add_one_symbol | |
1634 | (info, abfd, hds->root.root.string, | |
1635 | (flagword) 0, bfd_und_section_ptr, | |
1636 | (bfd_vma) 0, (const char *) NULL, | |
1637 | false, false, | |
1638 | ((struct bfd_link_hash_entry **) | |
1639 | NULL)))) | |
1640 | goto error_return; | |
1641 | } | |
1642 | h->descriptor = hds; | |
1643 | } | |
1644 | } | |
1645 | break; | |
1646 | } | |
1647 | } | |
aadf04f7 SS |
1648 | } |
1649 | ||
28a0c103 ILT |
1650 | free (reloc_info[sub->target_index].csects); |
1651 | reloc_info[sub->target_index].csects = NULL; | |
aadf04f7 | 1652 | |
28a0c103 ILT |
1653 | /* Reset SEC_RELOC, the reloc_count, and the lineno_count, |
1654 | since the reloc and lineno information is now attached to | |
1655 | the csects. */ | |
aadf04f7 SS |
1656 | sub->flags &=~ SEC_RELOC; |
1657 | sub->reloc_count = 0; | |
28a0c103 | 1658 | sub->lineno_count = 0; |
aadf04f7 SS |
1659 | |
1660 | /* If we are not keeping memory, free the reloc information. */ | |
1661 | if (! info->keep_memory | |
1662 | && coff_section_data (abfd, sub) != NULL | |
28a0c103 ILT |
1663 | && coff_section_data (abfd, sub)->relocs != NULL |
1664 | && ! coff_section_data (abfd, sub)->keep_relocs) | |
aadf04f7 SS |
1665 | { |
1666 | free (coff_section_data (abfd, sub)->relocs); | |
1667 | coff_section_data (abfd, sub)->relocs = NULL; | |
1668 | } | |
1669 | } | |
28a0c103 ILT |
1670 | |
1671 | /* Free up the line numbers. FIXME: We could cache these | |
1672 | somewhere for the final link, to avoid reading them again. */ | |
1673 | if (reloc_info[sub->target_index].linenos != NULL) | |
1674 | { | |
1675 | free (reloc_info[sub->target_index].linenos); | |
1676 | reloc_info[sub->target_index].linenos = NULL; | |
1677 | } | |
aadf04f7 SS |
1678 | } |
1679 | ||
1680 | free (reloc_info); | |
1681 | ||
28a0c103 ILT |
1682 | obj_coff_keep_syms (abfd) = keep_syms; |
1683 | ||
1684 | return true; | |
1685 | ||
1686 | error_return: | |
1687 | if (reloc_info != NULL) | |
1688 | { | |
1689 | for (sub = abfd->sections; sub != NULL; sub = sub->next) | |
1690 | { | |
1691 | if (reloc_info[sub->target_index].csects != NULL) | |
1692 | free (reloc_info[sub->target_index].csects); | |
1693 | if (reloc_info[sub->target_index].linenos != NULL) | |
1694 | free (reloc_info[sub->target_index].linenos); | |
1695 | } | |
1696 | free (reloc_info); | |
1697 | } | |
1698 | obj_coff_keep_syms (abfd) = keep_syms; | |
1699 | return false; | |
1700 | } | |
1701 | ||
1702 | #undef N_TMASK | |
1703 | #undef N_BTSHFT | |
1704 | ||
1705 | /* This function is used to add symbols from a dynamic object to the | |
1706 | global symbol table. */ | |
1707 | ||
1708 | static boolean | |
1709 | xcoff_link_add_dynamic_symbols (abfd, info) | |
1710 | bfd *abfd; | |
1711 | struct bfd_link_info *info; | |
1712 | { | |
1713 | bfd_size_type symesz; | |
1714 | bfd_byte *esym; | |
1715 | bfd_byte *esym_end; | |
1716 | struct xcoff_import_file *n; | |
1717 | const char *bname; | |
1718 | const char *mname; | |
1719 | const char *s; | |
1720 | unsigned int c; | |
1721 | struct xcoff_import_file **pp; | |
1722 | ||
1723 | /* We can only handle a dynamic object if we are generating an XCOFF | |
1724 | output file. */ | |
1725 | if (info->hash->creator != abfd->xvec) | |
1726 | { | |
1727 | (*_bfd_error_handler) | |
1728 | ("%s: XCOFF shared object when not producing XCOFF output", | |
1729 | bfd_get_filename (abfd)); | |
1730 | bfd_set_error (bfd_error_invalid_operation); | |
1731 | return false; | |
1732 | } | |
1733 | ||
1734 | /* Remove the sections from this object, so that they do not get | |
1735 | included in the link. */ | |
1736 | abfd->sections = NULL; | |
1737 | ||
1738 | symesz = bfd_coff_symesz (abfd); | |
1739 | esym = (bfd_byte *) obj_coff_external_syms (abfd); | |
1740 | esym_end = esym + obj_raw_syment_count (abfd) * symesz; | |
1741 | while (esym < esym_end) | |
1742 | { | |
1743 | struct internal_syment sym; | |
1744 | ||
1745 | bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); | |
1746 | ||
1747 | /* I think that every symbol mentioned in a dynamic object must | |
1748 | be defined by that object, perhaps by importing it from | |
1749 | another dynamic object. All we have to do is look up each | |
1750 | external symbol. If we have already put it in the hash | |
1751 | table, we simply set a flag indicating that it appears in a | |
1752 | dynamic object. */ | |
1753 | ||
1754 | if (sym.n_sclass == C_EXT) | |
1755 | { | |
1756 | const char *name; | |
1757 | char buf[SYMNMLEN + 1]; | |
1758 | struct xcoff_link_hash_entry *h; | |
1759 | ||
1760 | name = _bfd_coff_internal_syment_name (abfd, &sym, buf); | |
1761 | if (name == NULL) | |
1762 | return false; | |
1763 | ||
1764 | /* Normally we could not xcoff_link_hash_lookup in an add | |
1765 | symbols routine, since we might not be using an XCOFF | |
1766 | hash table. However, we verified above that we are using | |
1767 | an XCOFF hash table. */ | |
1768 | h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, | |
1769 | false, false, true); | |
1770 | if (h != NULL) | |
1771 | { | |
1772 | h->flags |= XCOFF_REF_DYNAMIC; | |
1773 | ||
1774 | /* If the symbol is undefined, and the current BFD is | |
1775 | not a dynamic object, change the BFD to this dynamic | |
1776 | object, so that we can get the import file ID | |
1777 | correctly. */ | |
1778 | if (h->root.u.undef.abfd == NULL | |
1779 | || (h->root.u.undef.abfd->flags & DYNAMIC) == 0) | |
1780 | h->root.u.undef.abfd = abfd; | |
1781 | ||
1782 | if (h->smclas == XMC_UA | |
1783 | && sym.n_numaux > 0) | |
1784 | { | |
1785 | union internal_auxent aux; | |
1786 | ||
1787 | bfd_coff_swap_aux_in (abfd, | |
1788 | (PTR) (esym + symesz * sym.n_numaux), | |
1789 | sym.n_type, sym.n_sclass, | |
1790 | sym.n_numaux - 1, sym.n_numaux, | |
1791 | (PTR) &aux); | |
1792 | h->smclas = aux.x_csect.x_smclas; | |
1793 | } | |
1794 | } | |
1795 | } | |
1796 | ||
1797 | esym += (sym.n_numaux + 1) * symesz; | |
1798 | } | |
1799 | ||
1800 | /* Record this file in the import files. */ | |
1801 | ||
1802 | n = ((struct xcoff_import_file *) | |
1803 | bfd_alloc (abfd, sizeof (struct xcoff_import_file))); | |
1804 | if (n == NULL) | |
1805 | { | |
1806 | bfd_set_error (bfd_error_no_memory); | |
1807 | return false; | |
1808 | } | |
1809 | n->next = NULL; | |
1810 | ||
1811 | /* For some reason, the path entry in the import file list for a | |
1812 | shared object appears to always be empty. The file name is the | |
1813 | base name. */ | |
1814 | n->path = ""; | |
1815 | if (abfd->my_archive == NULL) | |
1816 | { | |
1817 | bname = bfd_get_filename (abfd); | |
1818 | mname = ""; | |
1819 | } | |
1820 | else | |
1821 | { | |
1822 | bname = bfd_get_filename (abfd->my_archive); | |
1823 | mname = bfd_get_filename (abfd); | |
1824 | } | |
1825 | s = strrchr (bname, '/'); | |
1826 | if (s != NULL) | |
1827 | bname = s + 1; | |
1828 | n->file = bname; | |
1829 | n->member = mname; | |
1830 | ||
1831 | /* We start c at 1 because the first import file number is reserved | |
1832 | for LIBPATH. */ | |
1833 | for (pp = &xcoff_hash_table (info)->imports, c = 1; | |
1834 | *pp != NULL; | |
1835 | pp = &(*pp)->next, ++c) | |
1836 | ; | |
1837 | *pp = n; | |
1838 | ||
1839 | xcoff_data (abfd)->import_file_id = c; | |
1840 | ||
1841 | return true; | |
1842 | } | |
1843 | \f | |
1844 | /* Routines that are called after all the input files have been | |
1845 | handled, but before the sections are laid out in memory. */ | |
1846 | ||
1847 | /* Import a symbol. */ | |
1848 | ||
1849 | boolean | |
1850 | bfd_xcoff_import_symbol (output_bfd, info, harg, val, imppath, impfile, | |
1851 | impmember) | |
1852 | bfd *output_bfd; | |
1853 | struct bfd_link_info *info; | |
1854 | struct bfd_link_hash_entry *harg; | |
1855 | bfd_vma val; | |
1856 | const char *imppath; | |
1857 | const char *impfile; | |
1858 | const char *impmember; | |
1859 | { | |
1860 | struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; | |
1861 | ||
1862 | h->flags |= XCOFF_IMPORT; | |
1863 | ||
1864 | if (val != (bfd_vma) -1) | |
1865 | { | |
1866 | if (h->root.type == bfd_link_hash_defined) | |
1867 | { | |
1868 | if (! ((*info->callbacks->multiple_definition) | |
1869 | (info, h->root.root.string, h->root.u.def.section->owner, | |
1870 | h->root.u.def.section, h->root.u.def.value, | |
1871 | output_bfd, bfd_abs_section_ptr, val))) | |
1872 | return false; | |
1873 | } | |
1874 | ||
1875 | h->root.type = bfd_link_hash_defined; | |
1876 | h->root.u.def.section = bfd_abs_section_ptr; | |
1877 | h->root.u.def.value = val; | |
1878 | } | |
1879 | ||
1880 | if (h->ldsym == NULL) | |
1881 | { | |
1882 | h->ldsym = ((struct internal_ldsym *) | |
1883 | bfd_zalloc (output_bfd, sizeof (struct internal_ldsym))); | |
1884 | if (h->ldsym == NULL) | |
1885 | { | |
1886 | bfd_set_error (bfd_error_no_memory); | |
1887 | return false; | |
1888 | } | |
1889 | } | |
1890 | ||
1891 | if (imppath == NULL) | |
1892 | h->ldsym->l_ifile = (bfd_size_type) -1; | |
1893 | else | |
1894 | { | |
1895 | unsigned int c; | |
1896 | struct xcoff_import_file **pp; | |
1897 | ||
1898 | /* We start c at 1 because the first entry in the import list is | |
1899 | reserved for the library search path. */ | |
1900 | for (pp = &xcoff_hash_table (info)->imports, c = 1; | |
1901 | *pp != NULL; | |
1902 | pp = &(*pp)->next, ++c) | |
1903 | { | |
1904 | if (strcmp ((*pp)->path, imppath) == 0 | |
1905 | && strcmp ((*pp)->file, impfile) == 0 | |
1906 | && strcmp ((*pp)->member, impmember) == 0) | |
1907 | break; | |
1908 | } | |
1909 | ||
1910 | if (*pp == NULL) | |
1911 | { | |
1912 | struct xcoff_import_file *n; | |
1913 | ||
1914 | n = ((struct xcoff_import_file *) | |
1915 | bfd_alloc (output_bfd, sizeof (struct xcoff_import_file))); | |
1916 | if (n == NULL) | |
1917 | { | |
1918 | bfd_set_error (bfd_error_no_memory); | |
1919 | return false; | |
1920 | } | |
1921 | n->next = NULL; | |
1922 | n->path = imppath; | |
1923 | n->file = impfile; | |
1924 | n->member = impmember; | |
1925 | *pp = n; | |
1926 | } | |
1927 | ||
1928 | h->ldsym->l_ifile = c; | |
1929 | } | |
1930 | ||
1931 | return true; | |
1932 | } | |
1933 | ||
1934 | /* Export a symbol. */ | |
1935 | ||
1936 | boolean | |
1937 | bfd_xcoff_export_symbol (output_bfd, info, harg, syscall) | |
1938 | bfd *output_bfd; | |
1939 | struct bfd_link_info *info; | |
1940 | struct bfd_link_hash_entry *harg; | |
1941 | boolean syscall; | |
1942 | { | |
1943 | struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; | |
1944 | ||
1945 | h->flags |= XCOFF_EXPORT; | |
1946 | ||
1947 | /* FIXME: I'm not at all sure what syscall is supposed to mean, so | |
1948 | I'm just going to ignore it until somebody explains it. */ | |
1949 | ||
1950 | return true; | |
1951 | } | |
1952 | ||
1953 | /* This structure is used to pass information through | |
1954 | xcoff_link_hash_traverse. */ | |
1955 | ||
1956 | struct xcoff_loader_info | |
1957 | { | |
1958 | /* Set if a problem occurred. */ | |
1959 | boolean failed; | |
1960 | /* Output BFD. */ | |
1961 | bfd *output_bfd; | |
1962 | /* Link information structure. */ | |
1963 | struct bfd_link_info *info; | |
1964 | /* Number of ldsym structures. */ | |
1965 | size_t ldsym_count; | |
1966 | /* Size of string table. */ | |
1967 | size_t string_size; | |
1968 | /* String table. */ | |
1969 | bfd_byte *strings; | |
1970 | /* Allocated size of string table. */ | |
1971 | size_t string_alc; | |
1972 | }; | |
1973 | ||
1974 | /* Build the .loader section. This is called by the XCOFF linker | |
1975 | emulation before_allocation routine. We must set the size of the | |
1976 | .loader section before the linker lays out the output file. | |
1977 | LIBPATH is the library path to search for shared objects; this is | |
1978 | normally built from the -L arguments passed to the linker. ENTRY | |
1979 | is the name of the entry point symbol. */ | |
1980 | ||
1981 | boolean | |
1982 | bfd_xcoff_size_dynamic_sections (output_bfd, info, libpath, entry, | |
1983 | file_align, maxstack, maxdata, gc, | |
1984 | modtype, textro) | |
1985 | bfd *output_bfd; | |
1986 | struct bfd_link_info *info; | |
1987 | const char *libpath; | |
1988 | const char *entry; | |
1989 | unsigned long file_align; | |
1990 | unsigned long maxstack; | |
1991 | unsigned long maxdata; | |
1992 | boolean gc; | |
1993 | int modtype; | |
1994 | boolean textro; | |
1995 | { | |
1996 | struct xcoff_link_hash_entry *hentry; | |
1997 | asection *lsec; | |
1998 | struct xcoff_loader_info ldinfo; | |
1999 | size_t impsize, impcount; | |
2000 | struct xcoff_import_file *fl; | |
2001 | struct internal_ldhdr *ldhdr; | |
9c234e29 | 2002 | bfd_size_type stoff; |
28a0c103 ILT |
2003 | register char *out; |
2004 | asection *sec; | |
2005 | bfd *sub; | |
2006 | struct bfd_strtab_hash *debug_strtab; | |
2007 | bfd_byte *debug_contents = NULL; | |
2008 | ||
2009 | ldinfo.failed = false; | |
2010 | ldinfo.output_bfd = output_bfd; | |
2011 | ldinfo.info = info; | |
2012 | ldinfo.ldsym_count = 0; | |
2013 | ldinfo.string_size = 0; | |
2014 | ldinfo.strings = NULL; | |
2015 | ldinfo.string_alc = 0; | |
2016 | ||
2017 | xcoff_data (output_bfd)->maxstack = maxstack; | |
2018 | xcoff_data (output_bfd)->maxdata = maxdata; | |
2019 | xcoff_data (output_bfd)->modtype = modtype; | |
2020 | ||
2021 | xcoff_hash_table (info)->file_align = file_align; | |
2022 | xcoff_hash_table (info)->textro = textro; | |
2023 | ||
2024 | hentry = xcoff_link_hash_lookup (xcoff_hash_table (info), entry, | |
2025 | false, false, true); | |
2026 | if (hentry != NULL) | |
2027 | hentry->flags |= XCOFF_ENTRY; | |
2028 | ||
2029 | /* Garbage collect unused sections. */ | |
2030 | if (info->relocateable | |
2031 | || ! gc | |
2032 | || hentry == NULL | |
2033 | || (hentry->root.type != bfd_link_hash_defined | |
2034 | && hentry->root.type != bfd_link_hash_defweak)) | |
f78195df ILT |
2035 | { |
2036 | gc = false; | |
2037 | xcoff_hash_table (info)->gc = false; | |
2038 | } | |
28a0c103 ILT |
2039 | else |
2040 | { | |
2041 | if (! xcoff_mark (info, hentry->root.u.def.section)) | |
2042 | goto error_return; | |
2043 | xcoff_sweep (info); | |
2044 | xcoff_hash_table (info)->gc = true; | |
2045 | } | |
2046 | ||
2047 | if (info->input_bfds == NULL) | |
2048 | { | |
2049 | /* I'm not sure what to do in this bizarre case. */ | |
2050 | return true; | |
2051 | } | |
2052 | ||
2053 | xcoff_link_hash_traverse (xcoff_hash_table (info), xcoff_build_ldsyms, | |
2054 | (PTR) &ldinfo); | |
2055 | if (ldinfo.failed) | |
2056 | goto error_return; | |
2057 | ||
2058 | /* Work out the size of the import file names. Each import file ID | |
2059 | consists of three null terminated strings: the path, the file | |
2060 | name, and the archive member name. The first entry in the list | |
2061 | of names is the path to use to find objects, which the linker has | |
2062 | passed in as the libpath argument. For some reason, the path | |
2063 | entry in the other import file names appears to always be empty. */ | |
2064 | impsize = strlen (libpath) + 3; | |
2065 | impcount = 1; | |
2066 | for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next) | |
2067 | { | |
2068 | ++impcount; | |
2069 | impsize += (strlen (fl->path) | |
2070 | + strlen (fl->file) | |
2071 | + strlen (fl->member) | |
2072 | + 3); | |
2073 | } | |
2074 | ||
2075 | /* Set up the .loader section header. */ | |
2076 | ldhdr = &xcoff_hash_table (info)->ldhdr; | |
2077 | ldhdr->l_version = 1; | |
2078 | ldhdr->l_nsyms = ldinfo.ldsym_count; | |
2079 | ldhdr->l_nreloc = xcoff_hash_table (info)->ldrel_count; | |
2080 | ldhdr->l_istlen = impsize; | |
2081 | ldhdr->l_nimpid = impcount; | |
2082 | ldhdr->l_impoff = (LDHDRSZ | |
2083 | + ldhdr->l_nsyms * LDSYMSZ | |
2084 | + ldhdr->l_nreloc * LDRELSZ); | |
2085 | ldhdr->l_stlen = ldinfo.string_size; | |
9c234e29 ILT |
2086 | stoff = ldhdr->l_impoff + impsize; |
2087 | if (ldinfo.string_size == 0) | |
2088 | ldhdr->l_stoff = 0; | |
2089 | else | |
2090 | ldhdr->l_stoff = stoff; | |
28a0c103 ILT |
2091 | |
2092 | /* We now know the final size of the .loader section. Allocate | |
2093 | space for it. */ | |
2094 | lsec = xcoff_hash_table (info)->loader_section; | |
9c234e29 | 2095 | lsec->_raw_size = stoff + ldhdr->l_stlen; |
28a0c103 ILT |
2096 | lsec->contents = (bfd_byte *) bfd_zalloc (output_bfd, lsec->_raw_size); |
2097 | if (lsec->contents == NULL) | |
2098 | { | |
2099 | bfd_set_error (bfd_error_no_memory); | |
2100 | goto error_return; | |
2101 | } | |
2102 | ||
2103 | /* Set up the header. */ | |
2104 | xcoff_swap_ldhdr_out (output_bfd, ldhdr, | |
2105 | (struct external_ldhdr *) lsec->contents); | |
2106 | ||
2107 | /* Set up the import file names. */ | |
2108 | out = (char *) lsec->contents + ldhdr->l_impoff; | |
2109 | strcpy (out, libpath); | |
2110 | out += strlen (libpath) + 1; | |
2111 | *out++ = '\0'; | |
2112 | *out++ = '\0'; | |
2113 | for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next) | |
2114 | { | |
2115 | register const char *s; | |
2116 | ||
2117 | s = fl->path; | |
2118 | while ((*out++ = *s++) != '\0') | |
2119 | ; | |
2120 | s = fl->file; | |
2121 | while ((*out++ = *s++) != '\0') | |
2122 | ; | |
2123 | s = fl->member; | |
2124 | while ((*out++ = *s++) != '\0') | |
2125 | ; | |
2126 | } | |
2127 | ||
9c234e29 | 2128 | BFD_ASSERT ((bfd_size_type) ((bfd_byte *) out - lsec->contents) == stoff); |
28a0c103 ILT |
2129 | |
2130 | /* Set up the symbol string table. */ | |
2131 | if (ldinfo.string_size > 0) | |
aadf04f7 | 2132 | { |
28a0c103 ILT |
2133 | memcpy (out, ldinfo.strings, ldinfo.string_size); |
2134 | free (ldinfo.strings); | |
2135 | ldinfo.strings = NULL; | |
2136 | } | |
2137 | ||
2138 | /* We can't set up the symbol table or the relocs yet, because we | |
2139 | don't yet know the final position of the various sections. The | |
2140 | .loader symbols are written out when the corresponding normal | |
2141 | symbols are written out in xcoff_link_input_bfd or | |
2142 | xcoff_write_global_symbol. The .loader relocs are written out | |
2143 | when the corresponding normal relocs are handled in | |
2144 | xcoff_link_input_bfd. */ | |
2145 | ||
2146 | /* Allocate space for the global linkage section and the global toc | |
2147 | section. */ | |
2148 | sec = xcoff_hash_table (info)->linkage_section; | |
2149 | if (sec->_raw_size > 0) | |
2150 | { | |
2151 | sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size); | |
2152 | if (sec->contents == NULL) | |
2153 | { | |
2154 | bfd_set_error (bfd_error_no_memory); | |
2155 | goto error_return; | |
2156 | } | |
2157 | } | |
2158 | sec = xcoff_hash_table (info)->toc_section; | |
2159 | if (sec->_raw_size > 0) | |
2160 | { | |
2161 | sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size); | |
2162 | if (sec->contents == NULL) | |
2163 | { | |
2164 | bfd_set_error (bfd_error_no_memory); | |
2165 | goto error_return; | |
2166 | } | |
2167 | } | |
2168 | ||
2169 | /* Now that we've done garbage collection, figure out the contents | |
2170 | of the .debug section. */ | |
2171 | debug_strtab = xcoff_hash_table (info)->debug_strtab; | |
2172 | ||
2173 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
2174 | { | |
2175 | asection *subdeb; | |
2176 | bfd_size_type symcount; | |
2177 | unsigned long *debug_index; | |
2178 | asection **csectpp; | |
2179 | bfd_byte *esym, *esymend; | |
2180 | bfd_size_type symesz; | |
2181 | ||
2182 | if (sub->xvec != info->hash->creator) | |
2183 | continue; | |
2184 | subdeb = bfd_get_section_by_name (sub, ".debug"); | |
2185 | if (subdeb == NULL || subdeb->_raw_size == 0) | |
2186 | continue; | |
2187 | ||
2188 | if (info->strip == strip_all | |
2189 | || info->strip == strip_debugger | |
2190 | || info->discard == discard_all) | |
2191 | { | |
2192 | subdeb->_raw_size = 0; | |
2193 | continue; | |
2194 | } | |
2195 | ||
2196 | if (! _bfd_coff_get_external_symbols (sub)) | |
2197 | goto error_return; | |
2198 | ||
2199 | symcount = obj_raw_syment_count (sub); | |
2200 | debug_index = ((unsigned long *) | |
2201 | bfd_zalloc (sub, symcount * sizeof (unsigned long))); | |
2202 | if (debug_index == NULL) | |
2203 | { | |
2204 | bfd_set_error (bfd_error_no_memory); | |
2205 | goto error_return; | |
2206 | } | |
2207 | xcoff_data (sub)->debug_indices = debug_index; | |
2208 | ||
2209 | /* Grab the contents of the .debug section. We use malloc and | |
2210 | copy the neams into the debug stringtab, rather than | |
2211 | bfd_alloc, because I expect that, when linking many files | |
2212 | together, many of the strings will be the same. Storing the | |
2213 | strings in the hash table should save space in this case. */ | |
2214 | debug_contents = (bfd_byte *) malloc (subdeb->_raw_size); | |
2215 | if (debug_contents == NULL) | |
2216 | { | |
2217 | bfd_set_error (bfd_error_no_memory); | |
2218 | goto error_return; | |
2219 | } | |
2220 | if (! bfd_get_section_contents (sub, subdeb, (PTR) debug_contents, | |
2221 | (file_ptr) 0, subdeb->_raw_size)) | |
2222 | goto error_return; | |
2223 | ||
2224 | csectpp = xcoff_data (sub)->csects; | |
2225 | ||
2226 | symesz = bfd_coff_symesz (sub); | |
2227 | esym = (bfd_byte *) obj_coff_external_syms (sub); | |
2228 | esymend = esym + symcount * symesz; | |
2229 | while (esym < esymend) | |
2230 | { | |
2231 | struct internal_syment sym; | |
2232 | ||
2233 | bfd_coff_swap_sym_in (sub, (PTR) esym, (PTR) &sym); | |
2234 | ||
2235 | *debug_index = (unsigned long) -1; | |
2236 | ||
2237 | if (sym._n._n_n._n_zeroes == 0 | |
2238 | && *csectpp != NULL | |
2239 | && (! gc | |
2240 | || ((*csectpp)->flags & SEC_MARK) != 0 | |
2241 | || *csectpp == bfd_abs_section_ptr) | |
2242 | && bfd_coff_symname_in_debug (sub, &sym)) | |
2243 | { | |
2244 | char *name; | |
2245 | bfd_size_type indx; | |
2246 | ||
2247 | name = (char *) debug_contents + sym._n._n_n._n_offset; | |
2248 | indx = _bfd_stringtab_add (debug_strtab, name, true, true); | |
2249 | if (indx == (bfd_size_type) -1) | |
2250 | goto error_return; | |
2251 | *debug_index = indx; | |
2252 | } | |
2253 | ||
2254 | esym += (sym.n_numaux + 1) * symesz; | |
2255 | csectpp += sym.n_numaux + 1; | |
2256 | debug_index += sym.n_numaux + 1; | |
2257 | } | |
2258 | ||
aadf04f7 SS |
2259 | free (debug_contents); |
2260 | debug_contents = NULL; | |
28a0c103 ILT |
2261 | |
2262 | /* Clear the size of subdeb, so that it is not included directly | |
2263 | in the output file. */ | |
2264 | subdeb->_raw_size = 0; | |
2265 | ||
2266 | if (! info->keep_memory) | |
2267 | { | |
2268 | if (! _bfd_coff_free_symbols (sub)) | |
2269 | goto error_return; | |
2270 | } | |
aadf04f7 SS |
2271 | } |
2272 | ||
28a0c103 ILT |
2273 | xcoff_hash_table (info)->debug_section->_raw_size = |
2274 | _bfd_stringtab_size (debug_strtab); | |
2275 | ||
aadf04f7 SS |
2276 | return true; |
2277 | ||
2278 | error_return: | |
28a0c103 ILT |
2279 | if (ldinfo.strings != NULL) |
2280 | free (ldinfo.strings); | |
aadf04f7 SS |
2281 | if (debug_contents != NULL) |
2282 | free (debug_contents); | |
28a0c103 ILT |
2283 | return false; |
2284 | } | |
2285 | ||
2286 | /* The mark phase of garbage collection. For a given section, mark | |
2287 | it, and all the sections which define symbols to which it refers. */ | |
2288 | ||
2289 | static boolean | |
2290 | xcoff_mark (info, sec) | |
2291 | struct bfd_link_info *info; | |
2292 | asection *sec; | |
2293 | { | |
2294 | if ((sec->flags & SEC_MARK) != 0) | |
2295 | return true; | |
2296 | ||
2297 | sec->flags |= SEC_MARK; | |
2298 | ||
2299 | if (sec->owner->xvec == info->hash->creator | |
2300 | && coff_section_data (sec->owner, sec) != NULL | |
2301 | && xcoff_section_data (sec->owner, sec) != NULL) | |
aadf04f7 | 2302 | { |
28a0c103 ILT |
2303 | register struct xcoff_link_hash_entry **hp, **hpend; |
2304 | struct internal_reloc *rel, *relend; | |
2305 | ||
2306 | /* Mark all the symbols in this section. */ | |
2307 | ||
2308 | hp = (obj_xcoff_sym_hashes (sec->owner) | |
2309 | + xcoff_section_data (sec->owner, sec)->first_symndx); | |
2310 | hpend = (obj_xcoff_sym_hashes (sec->owner) | |
2311 | + xcoff_section_data (sec->owner, sec)->last_symndx); | |
2312 | for (; hp < hpend; hp++) | |
2313 | { | |
2314 | register struct xcoff_link_hash_entry *h; | |
2315 | ||
2316 | h = *hp; | |
2317 | if (h != NULL | |
2318 | && (h->flags & XCOFF_MARK) == 0) | |
2319 | { | |
2320 | h->flags |= XCOFF_MARK; | |
2321 | if (h->root.type == bfd_link_hash_defined | |
2322 | || h->root.type == bfd_link_hash_defweak) | |
2323 | { | |
2324 | asection *hsec; | |
2325 | ||
2326 | hsec = h->root.u.def.section; | |
2327 | if ((hsec->flags & SEC_MARK) == 0) | |
2328 | { | |
2329 | if (! xcoff_mark (info, hsec)) | |
2330 | return false; | |
2331 | } | |
2332 | } | |
2333 | ||
2334 | if (h->toc_section != NULL | |
2335 | && (h->toc_section->flags & SEC_MARK) == 0) | |
2336 | { | |
2337 | if (! xcoff_mark (info, h->toc_section)) | |
2338 | return false; | |
2339 | } | |
2340 | } | |
2341 | } | |
2342 | ||
2343 | /* Look through the section relocs. */ | |
2344 | ||
afe07862 ILT |
2345 | if ((sec->flags & SEC_RELOC) != 0 |
2346 | && sec->reloc_count > 0) | |
aadf04f7 | 2347 | { |
afe07862 ILT |
2348 | rel = xcoff_read_internal_relocs (sec->owner, sec, true, |
2349 | (bfd_byte *) NULL, false, | |
2350 | (struct internal_reloc *) NULL); | |
2351 | if (rel == NULL) | |
2352 | return false; | |
2353 | relend = rel + sec->reloc_count; | |
2354 | for (; rel < relend; rel++) | |
2355 | { | |
2356 | asection *rsec; | |
2357 | struct xcoff_link_hash_entry *h; | |
28a0c103 | 2358 | |
afe07862 ILT |
2359 | if ((unsigned int) rel->r_symndx |
2360 | > obj_raw_syment_count (sec->owner)) | |
2361 | continue; | |
28a0c103 | 2362 | |
afe07862 ILT |
2363 | h = obj_xcoff_sym_hashes (sec->owner)[rel->r_symndx]; |
2364 | if (h != NULL | |
2365 | && (h->flags & XCOFF_MARK) == 0) | |
28a0c103 | 2366 | { |
afe07862 ILT |
2367 | h->flags |= XCOFF_MARK; |
2368 | if (h->root.type == bfd_link_hash_defined | |
2369 | || h->root.type == bfd_link_hash_defweak) | |
2370 | { | |
2371 | asection *hsec; | |
28a0c103 | 2372 | |
afe07862 ILT |
2373 | hsec = h->root.u.def.section; |
2374 | if ((hsec->flags & SEC_MARK) == 0) | |
2375 | { | |
2376 | if (! xcoff_mark (info, hsec)) | |
2377 | return false; | |
2378 | } | |
2379 | } | |
2380 | ||
2381 | if (h->toc_section != NULL | |
2382 | && (h->toc_section->flags & SEC_MARK) == 0) | |
28a0c103 | 2383 | { |
afe07862 | 2384 | if (! xcoff_mark (info, h->toc_section)) |
28a0c103 ILT |
2385 | return false; |
2386 | } | |
2387 | } | |
2388 | ||
afe07862 ILT |
2389 | rsec = xcoff_data (sec->owner)->csects[rel->r_symndx]; |
2390 | if (rsec != NULL | |
2391 | && (rsec->flags & SEC_MARK) == 0) | |
28a0c103 | 2392 | { |
afe07862 | 2393 | if (! xcoff_mark (info, rsec)) |
28a0c103 ILT |
2394 | return false; |
2395 | } | |
2396 | } | |
2397 | ||
afe07862 ILT |
2398 | if (! info->keep_memory |
2399 | && coff_section_data (sec->owner, sec) != NULL | |
2400 | && coff_section_data (sec->owner, sec)->relocs != NULL | |
2401 | && ! coff_section_data (sec->owner, sec)->keep_relocs) | |
28a0c103 | 2402 | { |
afe07862 ILT |
2403 | free (coff_section_data (sec->owner, sec)->relocs); |
2404 | coff_section_data (sec->owner, sec)->relocs = NULL; | |
28a0c103 ILT |
2405 | } |
2406 | } | |
28a0c103 ILT |
2407 | } |
2408 | ||
2409 | return true; | |
2410 | } | |
2411 | ||
2412 | /* The sweep phase of garbage collection. Remove all garbage | |
2413 | sections. */ | |
2414 | ||
2415 | static void | |
2416 | xcoff_sweep (info) | |
2417 | struct bfd_link_info *info; | |
2418 | { | |
2419 | bfd *sub; | |
2420 | ||
2421 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
2422 | { | |
2423 | asection *o; | |
2424 | ||
2425 | for (o = sub->sections; o != NULL; o = o->next) | |
2426 | { | |
2427 | if ((o->flags & SEC_MARK) == 0) | |
2428 | { | |
2429 | /* Keep all sections from non-XCOFF input files. Keep | |
2430 | special sections. Keep .debug sections for the | |
2431 | moment. */ | |
2432 | if (sub->xvec != info->hash->creator | |
2433 | || o == xcoff_hash_table (info)->debug_section | |
2434 | || o == xcoff_hash_table (info)->loader_section | |
2435 | || o == xcoff_hash_table (info)->linkage_section | |
2436 | || o == xcoff_hash_table (info)->toc_section | |
2437 | || strcmp (o->name, ".debug") == 0) | |
2438 | o->flags |= SEC_MARK; | |
2439 | else | |
2440 | { | |
2441 | o->_raw_size = 0; | |
2442 | o->reloc_count = 0; | |
2443 | o->lineno_count = 0; | |
2444 | if (coff_section_data (sub, o) != NULL | |
2445 | && xcoff_section_data (sub, o) != NULL) | |
2446 | xcoff_hash_table (info)->ldrel_count -= | |
2447 | xcoff_section_data (sub, o)->ldrel_count; | |
2448 | } | |
2449 | } | |
2450 | } | |
2451 | } | |
2452 | } | |
2453 | ||
2454 | /* Add a symbol to the .loader symbols, if necessary. */ | |
2455 | ||
2456 | static boolean | |
2457 | xcoff_build_ldsyms (h, p) | |
2458 | struct xcoff_link_hash_entry *h; | |
2459 | PTR p; | |
2460 | { | |
2461 | struct xcoff_loader_info *ldinfo = (struct xcoff_loader_info *) p; | |
2462 | size_t len; | |
2463 | ||
2464 | /* We don't want to garbage collect symbols which are not defined in | |
2465 | XCOFF files. This is a convenient place to mark them. */ | |
2466 | if (xcoff_hash_table (ldinfo->info)->gc | |
2467 | && (h->flags & XCOFF_MARK) == 0 | |
2468 | && (h->root.type == bfd_link_hash_defined | |
2469 | || h->root.type == bfd_link_hash_defweak) | |
2470 | && (h->root.u.def.section->owner == NULL | |
2471 | || (h->root.u.def.section->owner->xvec | |
2472 | != ldinfo->info->hash->creator))) | |
2473 | h->flags |= XCOFF_MARK; | |
2474 | ||
2475 | /* If this symbol is called, and it is defined in a dynamic object, | |
2476 | then we need to set up global linkage code for it. (Unless we | |
2477 | did garbage collection and we didn't need this symbol.) */ | |
2478 | if ((h->flags & XCOFF_CALLED) != 0 | |
2479 | && (h->flags & XCOFF_DEF_REGULAR) == 0 | |
2480 | && (h->flags & XCOFF_REF_DYNAMIC) != 0 | |
2481 | && (h->root.type == bfd_link_hash_undefined | |
2482 | || h->root.type == bfd_link_hash_undefweak) | |
2483 | && h->root.root.string[0] == '.' | |
2484 | && (! xcoff_hash_table (ldinfo->info)->gc | |
2485 | || (h->flags & XCOFF_MARK) != 0)) | |
2486 | { | |
2487 | asection *sec; | |
2488 | struct xcoff_link_hash_entry *hds; | |
2489 | ||
2490 | sec = xcoff_hash_table (ldinfo->info)->linkage_section; | |
2491 | h->root.type = bfd_link_hash_defined; | |
2492 | h->root.u.def.section = sec; | |
2493 | h->root.u.def.value = sec->_raw_size; | |
2494 | h->smclas = XMC_GL; | |
2495 | sec->_raw_size += XCOFF_GLINK_SIZE; | |
2496 | ||
2497 | /* The global linkage code requires a TOC entry for the | |
2498 | descriptor. */ | |
2499 | hds = h->descriptor; | |
2500 | BFD_ASSERT ((hds->root.type == bfd_link_hash_undefined | |
2501 | || hds->root.type == bfd_link_hash_undefweak) | |
2502 | && (hds->flags & XCOFF_DEF_REGULAR) == 0 | |
2503 | && (hds->flags & XCOFF_REF_DYNAMIC) != 0); | |
2504 | hds->flags |= XCOFF_MARK; | |
2505 | if (hds->toc_section == NULL) | |
2506 | { | |
2507 | hds->toc_section = xcoff_hash_table (ldinfo->info)->toc_section; | |
2508 | hds->toc_offset = hds->toc_section->_raw_size; | |
2509 | hds->toc_section->_raw_size += 4; | |
2510 | ++xcoff_hash_table (ldinfo->info)->ldrel_count; | |
2511 | ++hds->toc_section->reloc_count; | |
2512 | hds->indx = -2; | |
2513 | hds->flags |= XCOFF_SET_TOC | XCOFF_LDREL; | |
2514 | ||
2515 | /* We need to call xcoff_build_ldsyms recursively here, | |
2516 | because we may already have passed hds on the traversal. */ | |
2517 | xcoff_build_ldsyms (hds, p); | |
2518 | } | |
2519 | } | |
2520 | ||
2521 | /* We need to add a symbol to the .loader section if it is mentioned | |
2522 | in a reloc which we are copying to the .loader section and it was | |
2523 | not defined, or if it is the entry point. */ | |
2524 | ||
2525 | if (((h->flags & XCOFF_LDREL) == 0 | |
2526 | || h->root.type == bfd_link_hash_defined | |
2527 | || h->root.type == bfd_link_hash_defweak) | |
2528 | && (h->flags & XCOFF_ENTRY) == 0) | |
2529 | { | |
2530 | h->ldsym = NULL; | |
2531 | return true; | |
2532 | } | |
2533 | ||
2534 | /* We don't need to add this symbol if we did garbage collection and | |
2535 | we did not mark this symbol. */ | |
2536 | if (xcoff_hash_table (ldinfo->info)->gc | |
2537 | && (h->flags & XCOFF_MARK) == 0) | |
2538 | { | |
2539 | h->ldsym = NULL; | |
2540 | return true; | |
2541 | } | |
2542 | ||
2543 | /* We may have already processed this symbol due to the recursive | |
2544 | call above. */ | |
2545 | if ((h->flags & XCOFF_BUILT_LDSYM) != 0) | |
2546 | return true; | |
2547 | ||
2548 | /* We need to add this symbol to the .loader symbols. */ | |
2549 | ||
2550 | /* h->ldsym will already have been allocated for an explicitly | |
2551 | imported symbol. */ | |
2552 | if (h->ldsym == NULL) | |
2553 | { | |
2554 | h->ldsym = ((struct internal_ldsym *) | |
2555 | bfd_zalloc (ldinfo->output_bfd, | |
2556 | sizeof (struct internal_ldsym))); | |
2557 | if (h->ldsym == NULL) | |
2558 | { | |
2559 | ldinfo->failed = true; | |
2560 | bfd_set_error (bfd_error_no_memory); | |
2561 | return false; | |
2562 | } | |
2563 | } | |
2564 | ||
2565 | /* The first 3 symbol table indices are reserved to indicate the | |
2566 | sections. */ | |
2567 | h->ldindx = ldinfo->ldsym_count + 3; | |
2568 | ||
2569 | ++ldinfo->ldsym_count; | |
2570 | ||
2571 | len = strlen (h->root.root.string); | |
2572 | if (len <= SYMNMLEN) | |
2573 | strncpy (h->ldsym->_l._l_name, h->root.root.string, SYMNMLEN); | |
2574 | else | |
2575 | { | |
2576 | if (ldinfo->string_size + len + 3 > ldinfo->string_alc) | |
2577 | { | |
2578 | size_t newalc; | |
2579 | bfd_byte *newstrings; | |
2580 | ||
2581 | newalc = ldinfo->string_alc * 2; | |
2582 | if (newalc == 0) | |
2583 | newalc = 32; | |
2584 | while (ldinfo->string_size + len + 3 > newalc) | |
2585 | newalc *= 2; | |
2586 | ||
2587 | if (ldinfo->strings == NULL) | |
2588 | newstrings = (bfd_byte *) malloc (newalc); | |
2589 | else | |
2590 | newstrings = ((bfd_byte *) | |
2591 | realloc ((PTR) ldinfo->strings, newalc)); | |
2592 | if (newstrings == NULL) | |
2593 | { | |
2594 | ldinfo->failed = true; | |
2595 | bfd_set_error (bfd_error_no_memory); | |
2596 | return false; | |
2597 | } | |
2598 | ldinfo->string_alc = newalc; | |
2599 | ldinfo->strings = newstrings; | |
aadf04f7 | 2600 | } |
28a0c103 ILT |
2601 | |
2602 | bfd_put_16 (ldinfo->output_bfd, len + 1, | |
2603 | ldinfo->strings + ldinfo->string_size); | |
2604 | strcpy (ldinfo->strings + ldinfo->string_size + 2, h->root.root.string); | |
2605 | h->ldsym->_l._l_l._l_zeroes = 0; | |
2606 | h->ldsym->_l._l_l._l_offset = ldinfo->string_size + 2; | |
2607 | ldinfo->string_size += len + 3; | |
aadf04f7 | 2608 | } |
28a0c103 ILT |
2609 | |
2610 | h->flags |= XCOFF_BUILT_LDSYM; | |
2611 | ||
2612 | return true; | |
aadf04f7 SS |
2613 | } |
2614 | \f | |
2615 | /* Do the final link step. */ | |
2616 | ||
2617 | boolean | |
2618 | _bfd_xcoff_bfd_final_link (abfd, info) | |
2619 | bfd *abfd; | |
2620 | struct bfd_link_info *info; | |
2621 | { | |
2622 | bfd_size_type symesz; | |
2623 | struct xcoff_final_link_info finfo; | |
2624 | asection *o; | |
2625 | struct bfd_link_order *p; | |
2626 | size_t max_contents_size; | |
2627 | size_t max_sym_count; | |
2628 | size_t max_lineno_count; | |
2629 | size_t max_reloc_count; | |
2630 | size_t max_output_reloc_count; | |
2631 | file_ptr rel_filepos; | |
2632 | unsigned int relsz; | |
2633 | file_ptr line_filepos; | |
2634 | unsigned int linesz; | |
2635 | bfd *sub; | |
2636 | bfd_byte *external_relocs = NULL; | |
2637 | char strbuf[STRING_SIZE_SIZE]; | |
2638 | ||
2639 | symesz = bfd_coff_symesz (abfd); | |
2640 | ||
2641 | finfo.info = info; | |
2642 | finfo.output_bfd = abfd; | |
2643 | finfo.strtab = NULL; | |
2644 | finfo.section_info = NULL; | |
2645 | finfo.last_file_index = -1; | |
2646 | finfo.toc_symindx = -1; | |
2647 | finfo.internal_syms = NULL; | |
2648 | finfo.sym_indices = NULL; | |
2649 | finfo.outsyms = NULL; | |
2650 | finfo.linenos = NULL; | |
2651 | finfo.contents = NULL; | |
2652 | finfo.external_relocs = NULL; | |
2653 | ||
28a0c103 ILT |
2654 | finfo.ldsym = ((struct external_ldsym *) |
2655 | (xcoff_hash_table (info)->loader_section->contents | |
2656 | + LDHDRSZ)); | |
2657 | finfo.ldrel = ((struct external_ldrel *) | |
2658 | (xcoff_hash_table (info)->loader_section->contents | |
2659 | + LDHDRSZ | |
2660 | + xcoff_hash_table (info)->ldhdr.l_nsyms * LDSYMSZ)); | |
2661 | ||
aadf04f7 SS |
2662 | xcoff_data (abfd)->coff.link_info = info; |
2663 | ||
2664 | finfo.strtab = _bfd_stringtab_init (); | |
2665 | if (finfo.strtab == NULL) | |
2666 | goto error_return; | |
2667 | ||
2668 | /* Compute the file positions for all the sections. */ | |
28a0c103 ILT |
2669 | if (abfd->output_has_begun) |
2670 | { | |
2671 | if (xcoff_hash_table (info)->file_align != 0) | |
2672 | abort (); | |
2673 | } | |
2674 | else | |
2675 | { | |
2676 | bfd_vma file_align; | |
2677 | ||
2678 | file_align = xcoff_hash_table (info)->file_align; | |
2679 | if (file_align != 0) | |
2680 | { | |
2681 | boolean saw_contents; | |
2682 | int indx; | |
2683 | asection **op; | |
2684 | file_ptr sofar; | |
2685 | ||
2686 | /* Insert .pad sections before every section which has | |
2687 | contents and is loaded, if it is preceded by some other | |
2688 | section which has contents and is loaded. */ | |
2689 | saw_contents = true; | |
2690 | for (op = &abfd->sections; *op != NULL; op = &(*op)->next) | |
2691 | { | |
2692 | (*op)->target_index = indx; | |
2693 | if (strcmp ((*op)->name, ".pad") == 0) | |
2694 | saw_contents = false; | |
2695 | else if (((*op)->flags & SEC_HAS_CONTENTS) != 0 | |
2696 | && ((*op)->flags & SEC_LOAD) != 0) | |
2697 | { | |
2698 | if (! saw_contents) | |
2699 | saw_contents = true; | |
2700 | else | |
2701 | { | |
2702 | asection *n, *hold; | |
2703 | ||
2704 | hold = *op; | |
2705 | *op = NULL; | |
2706 | n = bfd_make_section_anyway (abfd, ".pad"); | |
2707 | BFD_ASSERT (*op == n); | |
2708 | n->next = hold; | |
2709 | n->flags = SEC_HAS_CONTENTS; | |
2710 | n->alignment_power = 0; | |
2711 | saw_contents = false; | |
2712 | } | |
2713 | } | |
2714 | } | |
2715 | ||
2716 | /* Reset the section indices after inserting the new | |
2717 | sections. */ | |
2718 | indx = 0; | |
2719 | for (o = abfd->sections; o != NULL; o = o->next) | |
2720 | { | |
2721 | ++indx; | |
2722 | o->target_index = indx; | |
2723 | } | |
2724 | BFD_ASSERT ((unsigned int) indx == abfd->section_count); | |
2725 | ||
2726 | /* Work out appropriate sizes for the .pad sections to force | |
2727 | each section to land on a page boundary. This bit of | |
2728 | code knows what compute_section_file_positions is going | |
2729 | to do. */ | |
2730 | sofar = bfd_coff_filhsz (abfd); | |
2731 | if ((abfd->flags & EXEC_P) != 0) | |
2732 | sofar += bfd_coff_aoutsz (abfd); | |
2733 | else | |
2734 | { | |
2735 | /* FIXME. */ | |
2736 | sofar += 28; | |
2737 | } | |
2738 | sofar += abfd->section_count * bfd_coff_scnhsz (abfd); | |
2739 | ||
2740 | for (o = abfd->sections; o != NULL; o = o->next) | |
2741 | { | |
2742 | if (strcmp (o->name, ".pad") == 0) | |
2743 | { | |
2744 | bfd_vma pageoff; | |
2745 | ||
2746 | BFD_ASSERT (o->_raw_size == 0); | |
2747 | pageoff = sofar & (file_align - 1); | |
2748 | if (pageoff != 0) | |
2749 | { | |
2750 | o->_raw_size = file_align - pageoff; | |
2751 | sofar += file_align - pageoff; | |
2752 | o->flags |= SEC_HAS_CONTENTS; | |
2753 | } | |
2754 | } | |
2755 | else | |
2756 | { | |
2757 | if ((o->flags & SEC_HAS_CONTENTS) != 0) | |
2758 | sofar += BFD_ALIGN (o->_raw_size, | |
2759 | 1 << o->alignment_power); | |
2760 | } | |
2761 | } | |
2762 | } | |
2763 | ||
2764 | bfd_coff_compute_section_file_positions (abfd); | |
2765 | } | |
aadf04f7 SS |
2766 | |
2767 | /* Count the line numbers and relocation entries required for the | |
2768 | output file. Set the file positions for the relocs. */ | |
2769 | rel_filepos = obj_relocbase (abfd); | |
2770 | relsz = bfd_coff_relsz (abfd); | |
2771 | max_contents_size = 0; | |
2772 | max_lineno_count = 0; | |
2773 | max_reloc_count = 0; | |
2774 | for (o = abfd->sections; o != NULL; o = o->next) | |
2775 | { | |
2776 | o->reloc_count = 0; | |
2777 | o->lineno_count = 0; | |
2778 | for (p = o->link_order_head; p != NULL; p = p->next) | |
2779 | { | |
2780 | if (p->type == bfd_indirect_link_order) | |
2781 | { | |
2782 | asection *sec; | |
2783 | ||
2784 | sec = p->u.indirect.section; | |
2785 | ||
2786 | if (info->strip == strip_none | |
2787 | || info->strip == strip_some) | |
2788 | o->lineno_count += sec->lineno_count; | |
2789 | ||
2790 | o->reloc_count += sec->reloc_count; | |
2791 | ||
2792 | if (sec->_raw_size > max_contents_size) | |
2793 | max_contents_size = sec->_raw_size; | |
2794 | if (sec->lineno_count > max_lineno_count) | |
2795 | max_lineno_count = sec->lineno_count; | |
b73322d9 ILT |
2796 | if (coff_section_data (sec->owner, sec) != NULL |
2797 | && xcoff_section_data (sec->owner, sec) != NULL | |
2798 | && (xcoff_section_data (sec->owner, sec)->lineno_count | |
2799 | > max_lineno_count)) | |
2800 | max_lineno_count = | |
2801 | xcoff_section_data (sec->owner, sec)->lineno_count; | |
aadf04f7 SS |
2802 | if (sec->reloc_count > max_reloc_count) |
2803 | max_reloc_count = sec->reloc_count; | |
2804 | } | |
2805 | else if (p->type == bfd_section_reloc_link_order | |
2806 | || p->type == bfd_symbol_reloc_link_order) | |
2807 | ++o->reloc_count; | |
2808 | } | |
2809 | if (o->reloc_count == 0) | |
2810 | o->rel_filepos = 0; | |
2811 | else | |
2812 | { | |
2813 | o->flags |= SEC_RELOC; | |
2814 | o->rel_filepos = rel_filepos; | |
2815 | rel_filepos += o->reloc_count * relsz; | |
2816 | } | |
2817 | } | |
2818 | ||
2819 | /* Allocate space for the pointers we need to keep for the relocs. */ | |
2820 | { | |
2821 | unsigned int i; | |
2822 | ||
2823 | /* We use section_count + 1, rather than section_count, because | |
2824 | the target_index fields are 1 based. */ | |
2825 | finfo.section_info = ((struct xcoff_link_section_info *) | |
2826 | malloc ((abfd->section_count + 1) | |
2827 | * sizeof (struct xcoff_link_section_info))); | |
2828 | if (finfo.section_info == NULL) | |
2829 | { | |
2830 | bfd_set_error (bfd_error_no_memory); | |
2831 | goto error_return; | |
2832 | } | |
2833 | for (i = 0; i <= abfd->section_count; i++) | |
2834 | { | |
2835 | finfo.section_info[i].relocs = NULL; | |
2836 | finfo.section_info[i].rel_hashes = NULL; | |
2837 | } | |
2838 | } | |
2839 | ||
2840 | /* We now know the size of the relocs, so we can determine the file | |
2841 | positions of the line numbers. */ | |
2842 | line_filepos = rel_filepos; | |
2843 | linesz = bfd_coff_linesz (abfd); | |
2844 | max_output_reloc_count = 0; | |
2845 | for (o = abfd->sections; o != NULL; o = o->next) | |
2846 | { | |
2847 | if (o->lineno_count == 0) | |
2848 | o->line_filepos = 0; | |
2849 | else | |
2850 | { | |
2851 | o->line_filepos = line_filepos; | |
2852 | line_filepos += o->lineno_count * linesz; | |
2853 | } | |
2854 | ||
2855 | if (o->reloc_count != 0) | |
2856 | { | |
2857 | /* We don't know the indices of global symbols until we have | |
2858 | written out all the local symbols. For each section in | |
2859 | the output file, we keep an array of pointers to hash | |
2860 | table entries. Each entry in the array corresponds to a | |
2861 | reloc. When we find a reloc against a global symbol, we | |
2862 | set the corresponding entry in this array so that we can | |
2863 | fix up the symbol index after we have written out all the | |
2864 | local symbols. | |
2865 | ||
2866 | Because of this problem, we also keep the relocs in | |
2867 | memory until the end of the link. This wastes memory. | |
2868 | We could backpatch the file later, I suppose, although it | |
2869 | would be slow. */ | |
2870 | finfo.section_info[o->target_index].relocs = | |
2871 | ((struct internal_reloc *) | |
2872 | malloc (o->reloc_count * sizeof (struct internal_reloc))); | |
2873 | finfo.section_info[o->target_index].rel_hashes = | |
2874 | ((struct xcoff_link_hash_entry **) | |
2875 | malloc (o->reloc_count | |
2876 | * sizeof (struct xcoff_link_hash_entry *))); | |
2877 | if (finfo.section_info[o->target_index].relocs == NULL | |
2878 | || finfo.section_info[o->target_index].rel_hashes == NULL) | |
2879 | { | |
2880 | bfd_set_error (bfd_error_no_memory); | |
2881 | goto error_return; | |
2882 | } | |
2883 | ||
2884 | if (o->reloc_count > max_output_reloc_count) | |
2885 | max_output_reloc_count = o->reloc_count; | |
2886 | } | |
2887 | ||
2888 | /* Reset the reloc and lineno counts, so that we can use them to | |
2889 | count the number of entries we have output so far. */ | |
2890 | o->reloc_count = 0; | |
2891 | o->lineno_count = 0; | |
2892 | } | |
2893 | ||
2894 | obj_sym_filepos (abfd) = line_filepos; | |
2895 | ||
2896 | /* Figure out the largest number of symbols in an input BFD. Take | |
2897 | the opportunity to clear the output_has_begun fields of all the | |
2898 | input BFD's. We want at least 4 symbols, since that is the | |
2899 | number which xcoff_write_global_symbol may need. */ | |
2900 | max_sym_count = 4; | |
2901 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
2902 | { | |
2903 | size_t sz; | |
2904 | ||
2905 | sub->output_has_begun = false; | |
2906 | sz = obj_raw_syment_count (sub); | |
2907 | if (sz > max_sym_count) | |
2908 | max_sym_count = sz; | |
2909 | } | |
2910 | ||
2911 | /* Allocate some buffers used while linking. */ | |
2912 | finfo.internal_syms = ((struct internal_syment *) | |
2913 | malloc (max_sym_count | |
2914 | * sizeof (struct internal_syment))); | |
2915 | finfo.sym_indices = (long *) malloc (max_sym_count * sizeof (long)); | |
2916 | finfo.outsyms = ((bfd_byte *) | |
2917 | malloc ((size_t) ((max_sym_count + 1) * symesz))); | |
2918 | finfo.linenos = (bfd_byte *) malloc (max_lineno_count | |
2919 | * bfd_coff_linesz (abfd)); | |
2920 | finfo.contents = (bfd_byte *) malloc (max_contents_size); | |
2921 | finfo.external_relocs = (bfd_byte *) malloc (max_reloc_count * relsz); | |
2922 | if ((finfo.internal_syms == NULL && max_sym_count > 0) | |
2923 | || (finfo.sym_indices == NULL && max_sym_count > 0) | |
2924 | || finfo.outsyms == NULL | |
2925 | || (finfo.linenos == NULL && max_lineno_count > 0) | |
2926 | || (finfo.contents == NULL && max_contents_size > 0) | |
2927 | || (finfo.external_relocs == NULL && max_reloc_count > 0)) | |
2928 | { | |
2929 | bfd_set_error (bfd_error_no_memory); | |
2930 | goto error_return; | |
2931 | } | |
2932 | ||
2933 | obj_raw_syment_count (abfd) = 0; | |
2934 | xcoff_data (abfd)->toc = (bfd_vma) -1; | |
2935 | ||
aadf04f7 SS |
2936 | /* We now know the position of everything in the file, except that |
2937 | we don't know the size of the symbol table and therefore we don't | |
2938 | know where the string table starts. We just build the string | |
2939 | table in memory as we go along. We process all the relocations | |
2940 | for a single input file at once. */ | |
2941 | for (o = abfd->sections; o != NULL; o = o->next) | |
2942 | { | |
2943 | for (p = o->link_order_head; p != NULL; p = p->next) | |
2944 | { | |
2945 | if (p->type == bfd_indirect_link_order | |
2946 | && p->u.indirect.section->owner->xvec == abfd->xvec) | |
2947 | { | |
2948 | sub = p->u.indirect.section->owner; | |
2949 | if (! sub->output_has_begun) | |
2950 | { | |
2951 | if (! xcoff_link_input_bfd (&finfo, sub)) | |
2952 | goto error_return; | |
2953 | sub->output_has_begun = true; | |
2954 | } | |
2955 | } | |
2956 | else if (p->type == bfd_section_reloc_link_order | |
2957 | || p->type == bfd_symbol_reloc_link_order) | |
2958 | { | |
2959 | if (! xcoff_reloc_link_order (abfd, &finfo, o, p)) | |
2960 | goto error_return; | |
2961 | } | |
2962 | else | |
2963 | { | |
2964 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
2965 | goto error_return; | |
2966 | } | |
2967 | } | |
2968 | } | |
2969 | ||
2970 | /* Free up the buffers used by xcoff_link_input_bfd. */ | |
2971 | ||
2972 | if (finfo.internal_syms != NULL) | |
2973 | { | |
2974 | free (finfo.internal_syms); | |
2975 | finfo.internal_syms = NULL; | |
2976 | } | |
2977 | if (finfo.sym_indices != NULL) | |
2978 | { | |
2979 | free (finfo.sym_indices); | |
2980 | finfo.sym_indices = NULL; | |
2981 | } | |
2982 | if (finfo.linenos != NULL) | |
2983 | { | |
2984 | free (finfo.linenos); | |
2985 | finfo.linenos = NULL; | |
2986 | } | |
2987 | if (finfo.contents != NULL) | |
2988 | { | |
2989 | free (finfo.contents); | |
2990 | finfo.contents = NULL; | |
2991 | } | |
2992 | if (finfo.external_relocs != NULL) | |
2993 | { | |
2994 | free (finfo.external_relocs); | |
2995 | finfo.external_relocs = NULL; | |
2996 | } | |
2997 | ||
2998 | /* The value of the last C_FILE symbol is supposed to be -1. Write | |
2999 | it out again. */ | |
3000 | if (finfo.last_file_index != -1) | |
3001 | { | |
3002 | finfo.last_file.n_value = -1; | |
3003 | bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file, | |
3004 | (PTR) finfo.outsyms); | |
3005 | if (bfd_seek (abfd, | |
3006 | (obj_sym_filepos (abfd) | |
3007 | + finfo.last_file_index * symesz), | |
3008 | SEEK_SET) != 0 | |
3009 | || bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz) | |
3010 | goto error_return; | |
3011 | } | |
3012 | ||
28a0c103 ILT |
3013 | /* Write out all the global symbols which do not come from XCOFF |
3014 | input files. */ | |
3015 | xcoff_link_hash_traverse (xcoff_hash_table (info), | |
3016 | xcoff_write_global_symbol, | |
3017 | (PTR) &finfo); | |
3018 | ||
aadf04f7 SS |
3019 | if (finfo.outsyms != NULL) |
3020 | { | |
3021 | free (finfo.outsyms); | |
3022 | finfo.outsyms = NULL; | |
3023 | } | |
3024 | ||
3025 | /* Now that we have written out all the global symbols, we know the | |
3026 | symbol indices to use for relocs against them, and we can finally | |
3027 | write out the relocs. */ | |
3028 | external_relocs = (bfd_byte *) malloc (max_output_reloc_count * relsz); | |
3029 | if (external_relocs == NULL && max_output_reloc_count != 0) | |
3030 | { | |
3031 | bfd_set_error (bfd_error_no_memory); | |
3032 | goto error_return; | |
3033 | } | |
3034 | ||
3035 | for (o = abfd->sections; o != NULL; o = o->next) | |
3036 | { | |
3037 | struct internal_reloc *irel; | |
3038 | struct internal_reloc *irelend; | |
3039 | struct xcoff_link_hash_entry **rel_hash; | |
3040 | bfd_byte *erel; | |
3041 | ||
3042 | if (o->reloc_count == 0) | |
3043 | continue; | |
3044 | ||
aadf04f7 SS |
3045 | irel = finfo.section_info[o->target_index].relocs; |
3046 | irelend = irel + o->reloc_count; | |
3047 | rel_hash = finfo.section_info[o->target_index].rel_hashes; | |
aadf04f7 SS |
3048 | for (; irel < irelend; irel++, rel_hash++, erel += relsz) |
3049 | { | |
3050 | if (*rel_hash != NULL) | |
3051 | { | |
3052 | if ((*rel_hash)->indx < 0) | |
3053 | { | |
3054 | if (! ((*info->callbacks->unattached_reloc) | |
28a0c103 ILT |
3055 | (info, (*rel_hash)->root.root.string, |
3056 | (bfd *) NULL, o, irel->r_vaddr))) | |
aadf04f7 SS |
3057 | goto error_return; |
3058 | (*rel_hash)->indx = 0; | |
3059 | } | |
3060 | irel->r_symndx = (*rel_hash)->indx; | |
3061 | } | |
aadf04f7 SS |
3062 | } |
3063 | ||
28a0c103 ILT |
3064 | /* XCOFF requires that the relocs be sorted by address. We tend |
3065 | to produce them in the order in which their containing csects | |
3066 | appear in the symbol table, which is not necessarily by | |
3067 | address. So we sort them here. There may be a better way to | |
3068 | do this. */ | |
3069 | qsort ((PTR) finfo.section_info[o->target_index].relocs, | |
3070 | o->reloc_count, sizeof (struct internal_reloc), | |
3071 | xcoff_sort_relocs); | |
3072 | ||
3073 | irel = finfo.section_info[o->target_index].relocs; | |
3074 | irelend = irel + o->reloc_count; | |
3075 | erel = external_relocs; | |
3076 | for (; irel < irelend; irel++, rel_hash++, erel += relsz) | |
3077 | bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel); | |
3078 | ||
aadf04f7 SS |
3079 | if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0 |
3080 | || bfd_write ((PTR) external_relocs, relsz, o->reloc_count, | |
3081 | abfd) != relsz * o->reloc_count) | |
3082 | goto error_return; | |
3083 | } | |
3084 | ||
3085 | if (external_relocs != NULL) | |
3086 | { | |
3087 | free (external_relocs); | |
3088 | external_relocs = NULL; | |
3089 | } | |
3090 | ||
3091 | /* Free up the section information. */ | |
3092 | if (finfo.section_info != NULL) | |
3093 | { | |
3094 | unsigned int i; | |
3095 | ||
3096 | for (i = 0; i < abfd->section_count; i++) | |
3097 | { | |
3098 | if (finfo.section_info[i].relocs != NULL) | |
3099 | free (finfo.section_info[i].relocs); | |
3100 | if (finfo.section_info[i].rel_hashes != NULL) | |
3101 | free (finfo.section_info[i].rel_hashes); | |
3102 | } | |
3103 | free (finfo.section_info); | |
3104 | finfo.section_info = NULL; | |
3105 | } | |
3106 | ||
28a0c103 ILT |
3107 | /* Write out the loader section contents. */ |
3108 | BFD_ASSERT ((bfd_byte *) finfo.ldrel | |
3109 | == (xcoff_hash_table (info)->loader_section->contents | |
3110 | + xcoff_hash_table (info)->ldhdr.l_impoff)); | |
3111 | o = xcoff_hash_table (info)->loader_section; | |
3112 | if (! bfd_set_section_contents (abfd, o->output_section, | |
3113 | o->contents, o->output_offset, | |
3114 | o->_raw_size)) | |
3115 | goto error_return; | |
3116 | ||
3117 | /* Write out the global linkage section and the toc section. */ | |
3118 | o = xcoff_hash_table (info)->linkage_section; | |
3119 | if (o->_raw_size > 0 | |
3120 | && ! bfd_set_section_contents (abfd, o->output_section, o->contents, | |
3121 | o->output_offset, o->_raw_size)) | |
3122 | goto error_return; | |
3123 | o = xcoff_hash_table (info)->toc_section; | |
3124 | if (o->_raw_size > 0 | |
3125 | && ! bfd_set_section_contents (abfd, o->output_section, o->contents, | |
3126 | o->output_offset, o->_raw_size)) | |
3127 | goto error_return; | |
3128 | ||
aadf04f7 SS |
3129 | /* Write out the string table. */ |
3130 | if (bfd_seek (abfd, | |
3131 | (obj_sym_filepos (abfd) | |
3132 | + obj_raw_syment_count (abfd) * symesz), | |
3133 | SEEK_SET) != 0) | |
3134 | goto error_return; | |
3135 | bfd_h_put_32 (abfd, | |
3136 | _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE, | |
3137 | (bfd_byte *) strbuf); | |
3138 | if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE) | |
3139 | goto error_return; | |
3140 | if (! _bfd_stringtab_emit (abfd, finfo.strtab)) | |
3141 | goto error_return; | |
3142 | ||
3143 | _bfd_stringtab_free (finfo.strtab); | |
3144 | ||
3145 | /* Write out the debugging string table. */ | |
3146 | o = xcoff_hash_table (info)->debug_section; | |
3147 | if (o != NULL) | |
3148 | { | |
3149 | struct bfd_strtab_hash *debug_strtab; | |
3150 | ||
3151 | debug_strtab = xcoff_hash_table (info)->debug_strtab; | |
3152 | BFD_ASSERT (o->output_section->_raw_size - o->output_offset | |
3153 | >= _bfd_stringtab_size (debug_strtab)); | |
3154 | if (bfd_seek (abfd, | |
3155 | o->output_section->filepos + o->output_offset, | |
3156 | SEEK_SET) != 0) | |
3157 | goto error_return; | |
3158 | if (! _bfd_stringtab_emit (abfd, debug_strtab)) | |
3159 | goto error_return; | |
3160 | } | |
3161 | ||
3162 | /* Setting bfd_get_symcount to 0 will cause write_object_contents to | |
3163 | not try to write out the symbols. */ | |
3164 | bfd_get_symcount (abfd) = 0; | |
3165 | ||
3166 | return true; | |
3167 | ||
3168 | error_return: | |
3169 | if (finfo.strtab != NULL) | |
3170 | _bfd_stringtab_free (finfo.strtab); | |
3171 | if (finfo.section_info != NULL) | |
3172 | { | |
3173 | unsigned int i; | |
3174 | ||
3175 | for (i = 0; i < abfd->section_count; i++) | |
3176 | { | |
3177 | if (finfo.section_info[i].relocs != NULL) | |
3178 | free (finfo.section_info[i].relocs); | |
3179 | if (finfo.section_info[i].rel_hashes != NULL) | |
3180 | free (finfo.section_info[i].rel_hashes); | |
3181 | } | |
3182 | free (finfo.section_info); | |
3183 | } | |
3184 | if (finfo.internal_syms != NULL) | |
3185 | free (finfo.internal_syms); | |
3186 | if (finfo.sym_indices != NULL) | |
3187 | free (finfo.sym_indices); | |
3188 | if (finfo.outsyms != NULL) | |
3189 | free (finfo.outsyms); | |
3190 | if (finfo.linenos != NULL) | |
3191 | free (finfo.linenos); | |
3192 | if (finfo.contents != NULL) | |
3193 | free (finfo.contents); | |
3194 | if (finfo.external_relocs != NULL) | |
3195 | free (finfo.external_relocs); | |
3196 | if (external_relocs != NULL) | |
3197 | free (external_relocs); | |
3198 | return false; | |
3199 | } | |
3200 | ||
3201 | /* Link an input file into the linker output file. This function | |
3202 | handles all the sections and relocations of the input file at once. */ | |
3203 | ||
3204 | static boolean | |
3205 | xcoff_link_input_bfd (finfo, input_bfd) | |
3206 | struct xcoff_final_link_info *finfo; | |
3207 | bfd *input_bfd; | |
3208 | { | |
3209 | bfd *output_bfd; | |
3210 | const char *strings; | |
3211 | bfd_size_type syment_base; | |
3212 | unsigned int n_tmask; | |
3213 | unsigned int n_btshft; | |
3214 | boolean copy, hash; | |
3215 | bfd_size_type isymesz; | |
3216 | bfd_size_type osymesz; | |
3217 | bfd_size_type linesz; | |
3218 | bfd_byte *esym; | |
3219 | bfd_byte *esym_end; | |
b73322d9 | 3220 | struct xcoff_link_hash_entry **sym_hash; |
aadf04f7 SS |
3221 | struct internal_syment *isymp; |
3222 | asection **csectpp; | |
3223 | unsigned long *debug_index; | |
3224 | long *indexp; | |
3225 | unsigned long output_index; | |
3226 | bfd_byte *outsym; | |
b73322d9 | 3227 | asection *oline; |
aadf04f7 SS |
3228 | boolean keep_syms; |
3229 | asection *o; | |
3230 | ||
28a0c103 ILT |
3231 | /* We can just skip DYNAMIC files, unless this is a static link. */ |
3232 | if ((input_bfd->flags & DYNAMIC) != 0 | |
3233 | && ! finfo->info->static_link) | |
3234 | return true; | |
3235 | ||
aadf04f7 SS |
3236 | /* Move all the symbols to the output file. */ |
3237 | ||
3238 | output_bfd = finfo->output_bfd; | |
3239 | strings = NULL; | |
3240 | syment_base = obj_raw_syment_count (output_bfd); | |
3241 | isymesz = bfd_coff_symesz (input_bfd); | |
3242 | osymesz = bfd_coff_symesz (output_bfd); | |
3243 | linesz = bfd_coff_linesz (input_bfd); | |
3244 | BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd)); | |
3245 | ||
3246 | n_tmask = coff_data (input_bfd)->local_n_tmask; | |
3247 | n_btshft = coff_data (input_bfd)->local_n_btshft; | |
3248 | ||
3249 | /* Define macros so that ISFCN, et. al., macros work correctly. */ | |
3250 | #define N_TMASK n_tmask | |
3251 | #define N_BTSHFT n_btshft | |
3252 | ||
3253 | copy = false; | |
3254 | if (! finfo->info->keep_memory) | |
3255 | copy = true; | |
3256 | hash = true; | |
3257 | if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) | |
3258 | hash = false; | |
3259 | ||
3260 | if (! _bfd_coff_get_external_symbols (input_bfd)) | |
3261 | return false; | |
3262 | ||
3263 | esym = (bfd_byte *) obj_coff_external_syms (input_bfd); | |
3264 | esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; | |
3265 | sym_hash = obj_xcoff_sym_hashes (input_bfd); | |
3266 | csectpp = xcoff_data (input_bfd)->csects; | |
3267 | debug_index = xcoff_data (input_bfd)->debug_indices; | |
3268 | isymp = finfo->internal_syms; | |
3269 | indexp = finfo->sym_indices; | |
3270 | output_index = syment_base; | |
3271 | outsym = finfo->outsyms; | |
b73322d9 | 3272 | oline = NULL; |
aadf04f7 SS |
3273 | |
3274 | while (esym < esym_end) | |
3275 | { | |
3276 | struct internal_syment isym; | |
3277 | union internal_auxent aux; | |
3278 | int smtyp = 0; | |
3279 | boolean skip; | |
3280 | boolean require; | |
3281 | int add; | |
3282 | ||
3283 | bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp); | |
3284 | ||
3285 | /* If this is a C_EXT or C_HIDEXT symbol, we need the csect | |
3286 | information. */ | |
3287 | if (isymp->n_sclass == C_EXT || isymp->n_sclass == C_HIDEXT) | |
3288 | { | |
3289 | BFD_ASSERT (isymp->n_numaux > 0); | |
3290 | bfd_coff_swap_aux_in (input_bfd, | |
3291 | (PTR) (esym + isymesz * isymp->n_numaux), | |
3292 | isymp->n_type, isymp->n_sclass, | |
3293 | isymp->n_numaux - 1, isymp->n_numaux, | |
3294 | (PTR) &aux); | |
3295 | smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp); | |
3296 | } | |
3297 | ||
3298 | /* Make a copy of *isymp so that the relocate_section function | |
3299 | always sees the original values. This is more reliable than | |
3300 | always recomputing the symbol value even if we are stripping | |
3301 | the symbol. */ | |
3302 | isym = *isymp; | |
3303 | ||
28a0c103 ILT |
3304 | /* If this symbol is in the .loader section, swap out the |
3305 | .loader symbol information. If this is an external symbol | |
3306 | reference to a defined symbol, though, then wait until we get | |
3307 | to the definition. */ | |
3308 | if (isym.n_sclass == C_EXT | |
3309 | && *sym_hash != NULL | |
3310 | && (*sym_hash)->ldsym != NULL | |
3311 | && (smtyp != XTY_ER | |
3312 | || (*sym_hash)->root.type == bfd_link_hash_undefined)) | |
3313 | { | |
3314 | struct xcoff_link_hash_entry *h; | |
3315 | struct internal_ldsym *ldsym; | |
3316 | ||
3317 | h = *sym_hash; | |
3318 | ldsym = h->ldsym; | |
3319 | if (isym.n_scnum > 0) | |
3320 | { | |
3321 | ldsym->l_scnum = (*csectpp)->output_section->target_index; | |
3322 | ldsym->l_value = (isym.n_value | |
3323 | + (*csectpp)->output_section->vma | |
3324 | + (*csectpp)->output_offset | |
3325 | - (*csectpp)->vma); | |
3326 | } | |
3327 | else | |
3328 | { | |
3329 | ldsym->l_scnum = isym.n_scnum; | |
3330 | ldsym->l_value = isym.n_value; | |
3331 | } | |
3332 | ||
3333 | ldsym->l_smtype = smtyp; | |
3334 | if (((h->flags & XCOFF_DEF_REGULAR) == 0 | |
3335 | && (h->flags & XCOFF_REF_DYNAMIC) != 0) | |
3336 | || (h->flags & XCOFF_IMPORT) != 0) | |
3337 | ldsym->l_smtype |= L_IMPORT; | |
3338 | if (((h->flags & XCOFF_DEF_REGULAR) != 0 | |
3339 | && (h->flags & XCOFF_REF_DYNAMIC) != 0) | |
3340 | || (h->flags & XCOFF_EXPORT) != 0) | |
3341 | ldsym->l_smtype |= L_EXPORT; | |
3342 | if ((h->flags & XCOFF_ENTRY) != 0) | |
3343 | ldsym->l_smtype |= L_ENTRY; | |
3344 | ||
3345 | ldsym->l_smclas = aux.x_csect.x_smclas; | |
3346 | ||
3347 | if (ldsym->l_ifile == (bfd_size_type) -1) | |
3348 | ldsym->l_ifile = 0; | |
3349 | else if (ldsym->l_ifile == 0) | |
3350 | { | |
3351 | if ((ldsym->l_smtype & L_IMPORT) == 0) | |
3352 | ldsym->l_ifile = 0; | |
3353 | else | |
3354 | { | |
3355 | bfd *impbfd; | |
3356 | ||
3357 | if (h->root.type == bfd_link_hash_defined | |
3358 | || h->root.type == bfd_link_hash_defweak) | |
3359 | impbfd = h->root.u.def.section->owner; | |
3360 | else if (h->root.type == bfd_link_hash_undefined | |
3361 | || h->root.type == bfd_link_hash_undefweak) | |
3362 | impbfd = h->root.u.undef.abfd; | |
3363 | else | |
3364 | impbfd = NULL; | |
3365 | ||
3366 | if (impbfd == NULL) | |
3367 | ldsym->l_ifile = 0; | |
3368 | else | |
3369 | { | |
3370 | BFD_ASSERT (impbfd->xvec == finfo->output_bfd->xvec); | |
3371 | ldsym->l_ifile = xcoff_data (impbfd)->import_file_id; | |
3372 | } | |
3373 | } | |
3374 | } | |
3375 | ||
3376 | ldsym->l_parm = 0; | |
3377 | ||
3378 | BFD_ASSERT (h->ldindx >= 0); | |
3379 | BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym)); | |
3380 | xcoff_swap_ldsym_out (finfo->output_bfd, ldsym, | |
3381 | finfo->ldsym + h->ldindx - 3); | |
3382 | h->ldsym = NULL; | |
3383 | } | |
3384 | ||
aadf04f7 SS |
3385 | *indexp = -1; |
3386 | ||
3387 | skip = false; | |
3388 | require = false; | |
3389 | add = 1 + isym.n_numaux; | |
3390 | ||
3391 | /* If we are skipping this csect, we want to skip this symbol. */ | |
3392 | if (*csectpp == NULL) | |
3393 | skip = true; | |
3394 | ||
28a0c103 ILT |
3395 | /* If we garbage collected this csect, we want to skip this |
3396 | symbol. */ | |
3397 | if (! skip | |
3398 | && xcoff_hash_table (finfo->info)->gc | |
3399 | && ((*csectpp)->flags & SEC_MARK) == 0 | |
3400 | && *csectpp != bfd_abs_section_ptr) | |
3401 | skip = true; | |
3402 | ||
aadf04f7 SS |
3403 | /* An XCOFF linker always skips C_STAT symbols. */ |
3404 | if (! skip | |
3405 | && isymp->n_sclass == C_STAT) | |
3406 | skip = true; | |
3407 | ||
3408 | /* We skip all but the first TOC anchor. */ | |
3409 | if (! skip | |
3410 | && isymp->n_sclass == C_HIDEXT | |
3411 | && aux.x_csect.x_smclas == XMC_TC0) | |
3412 | { | |
3413 | if (finfo->toc_symindx != -1) | |
3414 | skip = true; | |
3415 | else | |
3416 | { | |
3417 | finfo->toc_symindx = output_index; | |
3418 | xcoff_data (finfo->output_bfd)->toc = | |
3419 | ((*csectpp)->output_section->vma | |
3420 | + (*csectpp)->output_offset | |
3421 | + isym.n_value | |
3422 | - (*csectpp)->vma); | |
3423 | require = true; | |
3424 | } | |
3425 | } | |
3426 | ||
3427 | /* If we are stripping all symbols, we want to skip this one. */ | |
3428 | if (! skip | |
3429 | && finfo->info->strip == strip_all) | |
3430 | skip = true; | |
3431 | ||
3432 | /* We can skip resolved external references. */ | |
3433 | if (! skip | |
3434 | && isym.n_sclass == C_EXT | |
3435 | && smtyp == XTY_ER | |
3436 | && (*sym_hash)->root.type != bfd_link_hash_undefined) | |
3437 | skip = true; | |
3438 | ||
28a0c103 ILT |
3439 | /* We can skip common symbols if they got defined somewhere |
3440 | else. */ | |
3441 | if (! skip | |
3442 | && isym.n_sclass == C_EXT | |
3443 | && smtyp == XTY_CM | |
3444 | && ((*sym_hash)->flags & XCOFF_DEF_REGULAR) != 0) | |
3445 | skip = true; | |
3446 | ||
aadf04f7 SS |
3447 | /* Skip local symbols if we are discarding them. */ |
3448 | if (! skip | |
3449 | && finfo->info->discard == discard_all | |
3450 | && isym.n_sclass != C_EXT | |
3451 | && (isym.n_sclass != C_HIDEXT | |
3452 | || smtyp != XTY_SD)) | |
3453 | skip = true; | |
3454 | ||
3455 | /* If we stripping debugging symbols, and this is a debugging | |
3456 | symbol, then skip it. */ | |
3457 | if (! skip | |
3458 | && finfo->info->strip == strip_debugger | |
3459 | && isym.n_scnum == N_DEBUG) | |
3460 | skip = true; | |
3461 | ||
3462 | /* If some symbols are stripped based on the name, work out the | |
3463 | name and decide whether to skip this symbol. We don't handle | |
3464 | this correctly for symbols whose names are in the .debug | |
3465 | section; to get it right we would need a new bfd_strtab_hash | |
3466 | function to return the string given the index. */ | |
3467 | if (! skip | |
3468 | && (finfo->info->strip == strip_some | |
3469 | || finfo->info->discard == discard_l) | |
3470 | && (debug_index == NULL || *debug_index == (unsigned long) -1)) | |
3471 | { | |
3472 | const char *name; | |
3473 | char buf[SYMNMLEN + 1]; | |
3474 | ||
3475 | name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf); | |
3476 | if (name == NULL) | |
3477 | return false; | |
3478 | ||
3479 | if ((finfo->info->strip == strip_some | |
3480 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, | |
3481 | false) == NULL)) | |
3482 | || (finfo->info->discard == discard_l | |
3483 | && (isym.n_sclass != C_EXT | |
3484 | && (isym.n_sclass != C_HIDEXT | |
3485 | || smtyp != XTY_SD)) | |
3486 | && strncmp (name, finfo->info->lprefix, | |
3487 | finfo->info->lprefix_len) == 0)) | |
3488 | skip = true; | |
3489 | } | |
3490 | ||
3491 | /* On the other hand, we can't skip global symbols which have | |
28a0c103 | 3492 | relocs against them. */ |
aadf04f7 | 3493 | if (skip |
28a0c103 | 3494 | && isym.n_sclass == C_EXT |
aadf04f7 SS |
3495 | && (*sym_hash)->indx == -2 |
3496 | && finfo->info->strip != strip_all) | |
3497 | skip = false; | |
3498 | ||
3499 | /* We can not skip the first TOC anchor. */ | |
3500 | if (skip | |
3501 | && require | |
3502 | && finfo->info->strip != strip_all) | |
3503 | skip = false; | |
3504 | ||
3505 | /* We now know whether we are to skip this symbol or not. */ | |
3506 | if (! skip) | |
3507 | { | |
3508 | /* Adjust the symbol in order to output it. */ | |
3509 | ||
3510 | if (isym._n._n_n._n_zeroes == 0 | |
3511 | && isym._n._n_n._n_offset != 0) | |
3512 | { | |
3513 | /* This symbol has a long name. Enter it in the string | |
3514 | table we are building. If *debug_index != -1, the | |
3515 | name has already been entered in the .debug section. */ | |
3516 | if (debug_index != NULL && *debug_index != (unsigned long) -1) | |
3517 | isym._n._n_n._n_offset = *debug_index; | |
3518 | else | |
3519 | { | |
3520 | const char *name; | |
3521 | bfd_size_type indx; | |
3522 | ||
3523 | name = _bfd_coff_internal_syment_name (input_bfd, &isym, | |
3524 | (char *) NULL); | |
3525 | if (name == NULL) | |
3526 | return false; | |
3527 | indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy); | |
3528 | if (indx == (bfd_size_type) -1) | |
3529 | return false; | |
3530 | isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; | |
3531 | } | |
3532 | } | |
3533 | ||
3534 | if (isym.n_sclass == C_BSTAT) | |
3535 | { | |
3536 | unsigned long indx; | |
3537 | ||
3538 | /* The value of a C_BSTAT symbol is the symbol table | |
3539 | index of the containing csect. */ | |
3540 | ||
3541 | indx = isym.n_value; | |
3542 | if (indx < obj_raw_syment_count (input_bfd)) | |
3543 | { | |
3544 | long symindx; | |
3545 | ||
3546 | symindx = finfo->sym_indices[indx]; | |
3547 | if (symindx < 0) | |
3548 | isym.n_value = 0; | |
3549 | else | |
3550 | isym.n_value = symindx; | |
3551 | } | |
3552 | } | |
3553 | else if (isym.n_scnum > 0) | |
3554 | { | |
3555 | isym.n_scnum = (*csectpp)->output_section->target_index; | |
3556 | isym.n_value += ((*csectpp)->output_section->vma | |
3557 | + (*csectpp)->output_offset | |
3558 | - (*csectpp)->vma); | |
3559 | } | |
3560 | ||
3561 | /* The value of a C_FILE symbol is the symbol index of the | |
3562 | next C_FILE symbol. The value of the last C_FILE symbol | |
3563 | is -1. We try to get this right, below, just before we | |
3564 | write the symbols out, but in the general case we may | |
3565 | have to write the symbol out twice. */ | |
3566 | if (isym.n_sclass == C_FILE) | |
3567 | { | |
3568 | if (finfo->last_file_index != -1 | |
3569 | && finfo->last_file.n_value != (long) output_index) | |
3570 | { | |
3571 | /* We must correct the value of the last C_FILE entry. */ | |
3572 | finfo->last_file.n_value = output_index; | |
3573 | if ((bfd_size_type) finfo->last_file_index >= syment_base) | |
3574 | { | |
3575 | /* The last C_FILE symbol is in this input file. */ | |
3576 | bfd_coff_swap_sym_out (output_bfd, | |
3577 | (PTR) &finfo->last_file, | |
3578 | (PTR) (finfo->outsyms | |
3579 | + ((finfo->last_file_index | |
3580 | - syment_base) | |
3581 | * osymesz))); | |
3582 | } | |
3583 | else | |
3584 | { | |
3585 | /* We have already written out the last C_FILE | |
3586 | symbol. We need to write it out again. We | |
3587 | borrow *outsym temporarily. */ | |
3588 | bfd_coff_swap_sym_out (output_bfd, | |
3589 | (PTR) &finfo->last_file, | |
3590 | (PTR) outsym); | |
3591 | if (bfd_seek (output_bfd, | |
3592 | (obj_sym_filepos (output_bfd) | |
3593 | + finfo->last_file_index * osymesz), | |
3594 | SEEK_SET) != 0 | |
3595 | || (bfd_write (outsym, osymesz, 1, output_bfd) | |
3596 | != osymesz)) | |
3597 | return false; | |
3598 | } | |
3599 | } | |
3600 | ||
3601 | finfo->last_file_index = output_index; | |
3602 | finfo->last_file = isym; | |
3603 | } | |
3604 | ||
3605 | /* Output the symbol. */ | |
3606 | ||
3607 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); | |
3608 | ||
3609 | *indexp = output_index; | |
3610 | ||
3611 | if (isym.n_sclass == C_EXT) | |
3612 | { | |
3613 | long indx; | |
3614 | struct xcoff_link_hash_entry *h; | |
3615 | ||
3616 | indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd)) | |
3617 | / isymesz); | |
3618 | h = obj_xcoff_sym_hashes (input_bfd)[indx]; | |
3619 | BFD_ASSERT (h != NULL); | |
3620 | h->indx = output_index; | |
3621 | } | |
3622 | ||
3623 | output_index += add; | |
3624 | outsym += add * osymesz; | |
3625 | } | |
3626 | ||
3627 | esym += add * isymesz; | |
3628 | isymp += add; | |
3629 | csectpp += add; | |
3630 | sym_hash += add; | |
3631 | if (debug_index != NULL) | |
3632 | debug_index += add; | |
3633 | ++indexp; | |
3634 | for (--add; add > 0; --add) | |
3635 | *indexp++ = -1; | |
3636 | } | |
3637 | ||
3638 | /* Fix up the aux entries. This must be done in a separate pass, | |
3639 | because we don't know the correct symbol indices until we have | |
3640 | already decided which symbols we are going to keep. */ | |
3641 | ||
3642 | esym = (bfd_byte *) obj_coff_external_syms (input_bfd); | |
3643 | esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; | |
3644 | isymp = finfo->internal_syms; | |
3645 | indexp = finfo->sym_indices; | |
28a0c103 | 3646 | csectpp = xcoff_data (input_bfd)->csects; |
aadf04f7 SS |
3647 | outsym = finfo->outsyms; |
3648 | while (esym < esym_end) | |
3649 | { | |
3650 | int add; | |
3651 | ||
3652 | add = 1 + isymp->n_numaux; | |
3653 | ||
3654 | if (*indexp < 0) | |
3655 | esym += add * isymesz; | |
3656 | else | |
3657 | { | |
3658 | int i; | |
3659 | ||
3660 | esym += isymesz; | |
3661 | outsym += osymesz; | |
3662 | ||
3663 | for (i = 0; i < isymp->n_numaux && esym < esym_end; i++) | |
3664 | { | |
3665 | union internal_auxent aux; | |
3666 | ||
3667 | bfd_coff_swap_aux_in (input_bfd, (PTR) esym, isymp->n_type, | |
3668 | isymp->n_sclass, i, isymp->n_numaux, | |
3669 | (PTR) &aux); | |
3670 | ||
3671 | if (isymp->n_sclass == C_FILE) | |
3672 | { | |
3673 | /* This is the file name (or some comment put in by | |
3674 | the compiler). If it is long, we must put it in | |
3675 | the string table. */ | |
3676 | if (aux.x_file.x_n.x_zeroes == 0 | |
3677 | && aux.x_file.x_n.x_offset != 0) | |
3678 | { | |
3679 | const char *filename; | |
3680 | bfd_size_type indx; | |
3681 | ||
3682 | BFD_ASSERT (aux.x_file.x_n.x_offset | |
3683 | >= STRING_SIZE_SIZE); | |
3684 | if (strings == NULL) | |
3685 | { | |
3686 | strings = _bfd_coff_read_string_table (input_bfd); | |
3687 | if (strings == NULL) | |
3688 | return false; | |
3689 | } | |
3690 | filename = strings + aux.x_file.x_n.x_offset; | |
3691 | indx = _bfd_stringtab_add (finfo->strtab, filename, | |
3692 | hash, copy); | |
3693 | if (indx == (bfd_size_type) -1) | |
3694 | return false; | |
3695 | aux.x_file.x_n.x_offset = STRING_SIZE_SIZE + indx; | |
3696 | } | |
3697 | } | |
3698 | else if ((isymp->n_sclass == C_EXT | |
3699 | || isymp->n_sclass == C_HIDEXT) | |
3700 | && i + 1 == isymp->n_numaux) | |
3701 | { | |
3702 | /* We don't support type checking. I don't know if | |
3703 | anybody does. */ | |
3704 | aux.x_csect.x_parmhash = 0; | |
3705 | /* I don't think anybody uses these fields, but we'd | |
3706 | better clobber them just in case. */ | |
3707 | aux.x_csect.x_stab = 0; | |
3708 | aux.x_csect.x_snstab = 0; | |
3709 | if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_LD) | |
3710 | { | |
3711 | unsigned long indx; | |
3712 | ||
3713 | indx = aux.x_csect.x_scnlen.l; | |
3714 | if (indx < obj_raw_syment_count (input_bfd)) | |
3715 | { | |
3716 | long symindx; | |
3717 | ||
3718 | symindx = finfo->sym_indices[indx]; | |
3719 | if (symindx < 0) | |
3720 | aux.x_sym.x_tagndx.l = 0; | |
3721 | else | |
3722 | aux.x_sym.x_tagndx.l = symindx; | |
3723 | } | |
3724 | } | |
3725 | } | |
3726 | else if (isymp->n_sclass != C_STAT || isymp->n_type != T_NULL) | |
3727 | { | |
3728 | unsigned long indx; | |
3729 | ||
3730 | if (ISFCN (isymp->n_type) | |
3731 | || ISTAG (isymp->n_sclass) | |
3732 | || isymp->n_sclass == C_BLOCK) | |
3733 | { | |
3734 | indx = aux.x_sym.x_fcnary.x_fcn.x_endndx.l; | |
3735 | if (indx > 0 | |
3736 | && indx < obj_raw_syment_count (input_bfd)) | |
3737 | { | |
3738 | /* We look forward through the symbol for | |
3739 | the index of the next symbol we are going | |
3740 | to include. I don't know if this is | |
3741 | entirely right. */ | |
3742 | while (finfo->sym_indices[indx] < 0 | |
3743 | && indx < obj_raw_syment_count (input_bfd)) | |
3744 | ++indx; | |
3745 | if (indx >= obj_raw_syment_count (input_bfd)) | |
3746 | indx = output_index; | |
3747 | else | |
3748 | indx = finfo->sym_indices[indx]; | |
3749 | aux.x_sym.x_fcnary.x_fcn.x_endndx.l = indx; | |
3750 | } | |
3751 | } | |
3752 | ||
3753 | indx = aux.x_sym.x_tagndx.l; | |
3754 | if (indx > 0 && indx < obj_raw_syment_count (input_bfd)) | |
3755 | { | |
3756 | long symindx; | |
3757 | ||
3758 | symindx = finfo->sym_indices[indx]; | |
3759 | if (symindx < 0) | |
3760 | aux.x_sym.x_tagndx.l = 0; | |
3761 | else | |
3762 | aux.x_sym.x_tagndx.l = symindx; | |
3763 | } | |
3764 | } | |
3765 | ||
28a0c103 ILT |
3766 | /* Copy over the line numbers, unless we are stripping |
3767 | them. We do this on a symbol by symbol basis in | |
3768 | order to more easily handle garbage collection. */ | |
3769 | if ((isymp->n_sclass == C_EXT | |
3770 | || isymp->n_sclass == C_HIDEXT) | |
3771 | && i == 0 | |
3772 | && isymp->n_numaux > 1 | |
3773 | && ISFCN (isymp->n_type) | |
3774 | && aux.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0) | |
aadf04f7 | 3775 | { |
28a0c103 ILT |
3776 | if (finfo->info->strip != strip_none |
3777 | && finfo->info->strip != strip_some) | |
3778 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0; | |
aadf04f7 SS |
3779 | else |
3780 | { | |
28a0c103 | 3781 | asection *enclosing; |
b73322d9 | 3782 | unsigned int enc_count; |
28a0c103 ILT |
3783 | bfd_size_type linoff; |
3784 | struct internal_lineno lin; | |
3785 | ||
3786 | o = *csectpp; | |
3787 | enclosing = xcoff_section_data (abfd, o)->enclosing; | |
b73322d9 ILT |
3788 | enc_count = xcoff_section_data (abfd, o)->lineno_count; |
3789 | if (oline != enclosing) | |
3790 | { | |
3791 | if (bfd_seek (input_bfd, | |
3792 | enclosing->line_filepos, | |
3793 | SEEK_SET) != 0 | |
3794 | || (bfd_read (finfo->linenos, linesz, | |
3795 | enc_count, input_bfd) | |
3796 | != linesz * enc_count)) | |
3797 | return false; | |
3798 | oline = enclosing; | |
3799 | } | |
3800 | ||
28a0c103 ILT |
3801 | linoff = (aux.x_sym.x_fcnary.x_fcn.x_lnnoptr |
3802 | - enclosing->line_filepos); | |
3803 | ||
28a0c103 | 3804 | bfd_coff_swap_lineno_in (input_bfd, |
b73322d9 | 3805 | (PTR) (finfo->linenos + linoff), |
28a0c103 ILT |
3806 | (PTR) &lin); |
3807 | if (lin.l_lnno != 0 | |
3808 | || ((bfd_size_type) lin.l_addr.l_symndx | |
3809 | != ((esym | |
3810 | - isymesz | |
3811 | - ((bfd_byte *) | |
3812 | obj_coff_external_syms (input_bfd))) | |
3813 | / isymesz))) | |
3814 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0; | |
3815 | else | |
aadf04f7 | 3816 | { |
28a0c103 ILT |
3817 | bfd_byte *linpend, *linp; |
3818 | bfd_vma offset; | |
3819 | bfd_size_type count; | |
3820 | ||
3821 | lin.l_addr.l_symndx = *indexp; | |
3822 | bfd_coff_swap_lineno_out (output_bfd, (PTR) &lin, | |
b73322d9 ILT |
3823 | (PTR) (finfo->linenos |
3824 | + linoff)); | |
28a0c103 ILT |
3825 | |
3826 | linpend = (finfo->linenos | |
b73322d9 | 3827 | + enc_count * linesz); |
28a0c103 ILT |
3828 | offset = (o->output_section->vma |
3829 | + o->output_offset | |
3830 | - o->vma); | |
b73322d9 | 3831 | for (linp = finfo->linenos + linoff + linesz; |
28a0c103 ILT |
3832 | linp < linpend; |
3833 | linp += linesz) | |
3834 | { | |
3835 | bfd_coff_swap_lineno_in (input_bfd, (PTR) linp, | |
3836 | (PTR) &lin); | |
3837 | if (lin.l_lnno == 0) | |
3838 | break; | |
3839 | lin.l_addr.l_paddr += offset; | |
3840 | bfd_coff_swap_lineno_out (output_bfd, | |
3841 | (PTR) &lin, | |
3842 | (PTR) linp); | |
3843 | } | |
3844 | ||
b73322d9 | 3845 | count = (linp - (finfo->linenos + linoff)) / linesz; |
28a0c103 ILT |
3846 | |
3847 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = | |
aadf04f7 | 3848 | (o->output_section->line_filepos |
28a0c103 ILT |
3849 | + o->output_section->lineno_count * linesz); |
3850 | ||
3851 | if (bfd_seek (output_bfd, | |
3852 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr, | |
3853 | SEEK_SET) != 0 | |
b73322d9 ILT |
3854 | || (bfd_write (finfo->linenos + linoff, |
3855 | linesz, count, output_bfd) | |
28a0c103 ILT |
3856 | != linesz * count)) |
3857 | return false; | |
3858 | ||
3859 | o->output_section->lineno_count += count; | |
aadf04f7 SS |
3860 | } |
3861 | } | |
aadf04f7 SS |
3862 | } |
3863 | ||
28a0c103 ILT |
3864 | bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, isymp->n_type, |
3865 | isymp->n_sclass, i, isymp->n_numaux, | |
3866 | (PTR) outsym); | |
3867 | outsym += osymesz; | |
3868 | esym += isymesz; | |
aadf04f7 | 3869 | } |
aadf04f7 | 3870 | } |
28a0c103 ILT |
3871 | |
3872 | indexp += add; | |
3873 | isymp += add; | |
3874 | csectpp += add; | |
aadf04f7 SS |
3875 | } |
3876 | ||
3877 | /* If we swapped out a C_FILE symbol, guess that the next C_FILE | |
3878 | symbol will be the first symbol in the next input file. In the | |
3879 | normal case, this will save us from writing out the C_FILE symbol | |
3880 | again. */ | |
3881 | if (finfo->last_file_index != -1 | |
3882 | && (bfd_size_type) finfo->last_file_index >= syment_base) | |
3883 | { | |
3884 | finfo->last_file.n_value = output_index; | |
3885 | bfd_coff_swap_sym_out (output_bfd, (PTR) &finfo->last_file, | |
3886 | (PTR) (finfo->outsyms | |
3887 | + ((finfo->last_file_index - syment_base) | |
3888 | * osymesz))); | |
3889 | } | |
3890 | ||
3891 | /* Write the modified symbols to the output file. */ | |
3892 | if (outsym > finfo->outsyms) | |
3893 | { | |
3894 | if (bfd_seek (output_bfd, | |
3895 | obj_sym_filepos (output_bfd) + syment_base * osymesz, | |
3896 | SEEK_SET) != 0 | |
3897 | || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, | |
3898 | output_bfd) | |
3899 | != (bfd_size_type) (outsym - finfo->outsyms))) | |
3900 | return false; | |
3901 | ||
3902 | BFD_ASSERT ((obj_raw_syment_count (output_bfd) | |
3903 | + (outsym - finfo->outsyms) / osymesz) | |
3904 | == output_index); | |
3905 | ||
3906 | obj_raw_syment_count (output_bfd) = output_index; | |
3907 | } | |
3908 | ||
3909 | /* Don't let the linker relocation routines discard the symbols. */ | |
3910 | keep_syms = obj_coff_keep_syms (input_bfd); | |
3911 | obj_coff_keep_syms (input_bfd) = true; | |
3912 | ||
3913 | /* Relocate the contents of each section. */ | |
3914 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
3915 | { | |
3916 | bfd_byte *contents; | |
3917 | ||
3918 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
28a0c103 ILT |
3919 | || o->_raw_size == 0 |
3920 | || (o->flags & SEC_IN_MEMORY) != 0) | |
aadf04f7 SS |
3921 | continue; |
3922 | ||
3923 | /* We have set filepos correctly for the sections we created to | |
3924 | represent csects, so bfd_get_section_contents should work. */ | |
3925 | if (coff_section_data (input_bfd, o) != NULL | |
3926 | && coff_section_data (input_bfd, o)->contents != NULL) | |
3927 | contents = coff_section_data (input_bfd, o)->contents; | |
3928 | else | |
3929 | { | |
3930 | if (! bfd_get_section_contents (input_bfd, o, finfo->contents, | |
3931 | (file_ptr) 0, o->_raw_size)) | |
3932 | return false; | |
3933 | contents = finfo->contents; | |
3934 | } | |
3935 | ||
3936 | if ((o->flags & SEC_RELOC) != 0) | |
3937 | { | |
3938 | int target_index; | |
3939 | struct internal_reloc *internal_relocs; | |
3940 | struct internal_reloc *irel; | |
3941 | bfd_vma offset; | |
3942 | struct internal_reloc *irelend; | |
3943 | struct xcoff_link_hash_entry **rel_hash; | |
28a0c103 | 3944 | long r_symndx; |
aadf04f7 | 3945 | |
28a0c103 | 3946 | /* Read in the relocs. */ |
aadf04f7 | 3947 | target_index = o->output_section->target_index; |
28a0c103 | 3948 | internal_relocs = (xcoff_read_internal_relocs |
aadf04f7 SS |
3949 | (input_bfd, o, false, finfo->external_relocs, |
3950 | true, | |
3951 | (finfo->section_info[target_index].relocs | |
3952 | + o->output_section->reloc_count))); | |
3953 | if (internal_relocs == NULL) | |
3954 | return false; | |
3955 | ||
3956 | /* Call processor specific code to relocate the section | |
3957 | contents. */ | |
3958 | if (! bfd_coff_relocate_section (output_bfd, finfo->info, | |
3959 | input_bfd, o, | |
3960 | contents, | |
3961 | internal_relocs, | |
3962 | finfo->internal_syms, | |
3963 | xcoff_data (input_bfd)->csects)) | |
3964 | return false; | |
3965 | ||
3966 | offset = o->output_section->vma + o->output_offset - o->vma; | |
3967 | irel = internal_relocs; | |
3968 | irelend = irel + o->reloc_count; | |
3969 | rel_hash = (finfo->section_info[target_index].rel_hashes | |
3970 | + o->output_section->reloc_count); | |
3971 | for (; irel < irelend; irel++, rel_hash++) | |
3972 | { | |
28a0c103 ILT |
3973 | struct xcoff_link_hash_entry *h = NULL; |
3974 | struct internal_ldrel ldrel; | |
aadf04f7 SS |
3975 | |
3976 | *rel_hash = NULL; | |
3977 | ||
3978 | /* Adjust the reloc address and symbol index. */ | |
3979 | ||
3980 | irel->r_vaddr += offset; | |
3981 | ||
28a0c103 | 3982 | r_symndx = irel->r_symndx; |
aadf04f7 | 3983 | |
28a0c103 | 3984 | if (r_symndx != -1) |
aadf04f7 | 3985 | { |
28a0c103 ILT |
3986 | h = obj_xcoff_sym_hashes (input_bfd)[r_symndx]; |
3987 | if (h != NULL) | |
3988 | { | |
3989 | /* This is a global symbol. */ | |
3990 | if (h->indx >= 0) | |
3991 | irel->r_symndx = h->indx; | |
3992 | else | |
3993 | { | |
3994 | /* This symbol is being written at the end | |
3995 | of the file, and we do not yet know the | |
3996 | symbol index. We save the pointer to the | |
3997 | hash table entry in the rel_hash list. | |
3998 | We set the indx field to -2 to indicate | |
3999 | that this symbol must not be stripped. */ | |
4000 | *rel_hash = h; | |
4001 | h->indx = -2; | |
4002 | } | |
4003 | } | |
aadf04f7 SS |
4004 | else |
4005 | { | |
28a0c103 ILT |
4006 | long indx; |
4007 | ||
4008 | indx = finfo->sym_indices[r_symndx]; | |
4009 | ||
4010 | if (indx == -1) | |
4011 | { | |
4012 | struct internal_syment *is; | |
4013 | ||
4014 | /* Relocations against a TC0 TOC anchor are | |
4015 | automatically transformed to be against | |
4016 | the TOC anchor in the output file. */ | |
4017 | is = finfo->internal_syms + r_symndx; | |
4018 | if (is->n_sclass == C_HIDEXT | |
4019 | && is->n_numaux > 0) | |
4020 | { | |
4021 | PTR auxptr; | |
4022 | union internal_auxent aux; | |
4023 | ||
4024 | auxptr = ((PTR) | |
4025 | (((bfd_byte *) | |
4026 | obj_coff_external_syms (input_bfd)) | |
4027 | + ((r_symndx + is->n_numaux) | |
4028 | * isymesz))); | |
4029 | bfd_coff_swap_aux_in (input_bfd, auxptr, | |
4030 | is->n_type, is->n_sclass, | |
4031 | is->n_numaux - 1, | |
4032 | is->n_numaux, | |
4033 | (PTR) &aux); | |
4034 | if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_SD | |
4035 | && aux.x_csect.x_smclas == XMC_TC0) | |
4036 | indx = finfo->toc_symindx; | |
4037 | } | |
4038 | } | |
4039 | ||
4040 | if (indx != -1) | |
4041 | irel->r_symndx = indx; | |
4042 | else | |
4043 | { | |
4044 | struct internal_syment *is; | |
4045 | const char *name; | |
4046 | char buf[SYMNMLEN + 1]; | |
4047 | ||
4048 | /* This reloc is against a symbol we are | |
4049 | stripping. It would be possible to handle | |
4050 | this case, but I don't think it's worth it. */ | |
4051 | is = finfo->internal_syms + r_symndx; | |
4052 | ||
4053 | name = (_bfd_coff_internal_syment_name | |
4054 | (input_bfd, is, buf)); | |
4055 | if (name == NULL) | |
4056 | return false; | |
4057 | ||
4058 | if (! ((*finfo->info->callbacks->unattached_reloc) | |
4059 | (finfo->info, name, input_bfd, o, | |
4060 | irel->r_vaddr))) | |
4061 | return false; | |
4062 | } | |
aadf04f7 SS |
4063 | } |
4064 | } | |
28a0c103 ILT |
4065 | |
4066 | switch (irel->r_type) | |
aadf04f7 | 4067 | { |
28a0c103 ILT |
4068 | default: |
4069 | break; | |
4070 | case R_POS: | |
4071 | case R_NEG: | |
4072 | case R_RL: | |
4073 | case R_RLA: | |
4074 | /* This reloc needs to be copied into the .loader | |
4075 | section. */ | |
4076 | ldrel.l_vaddr = irel->r_vaddr; | |
4077 | if (r_symndx == -1) | |
4078 | ldrel.l_symndx = -1; | |
4079 | else if (h == NULL) | |
4080 | { | |
4081 | asection *sec; | |
aadf04f7 | 4082 | |
28a0c103 ILT |
4083 | sec = xcoff_data (input_bfd)->csects[r_symndx]; |
4084 | if ((sec->flags & SEC_CODE) != 0) | |
4085 | ldrel.l_symndx = 0; | |
4086 | else if ((sec->flags & SEC_HAS_CONTENTS) != 0) | |
4087 | ldrel.l_symndx = 1; | |
4088 | else | |
4089 | ldrel.l_symndx = 2; | |
4090 | } | |
4091 | else if (h->root.type == bfd_link_hash_defined | |
4092 | || h->root.type == bfd_link_hash_defweak) | |
4093 | { | |
4094 | asection *sec; | |
aadf04f7 | 4095 | |
28a0c103 ILT |
4096 | sec = h->root.u.def.section->output_section; |
4097 | if ((sec->flags & SEC_CODE) != 0) | |
4098 | ldrel.l_symndx = 0; | |
4099 | else if ((sec->flags & SEC_HAS_CONTENTS) != 0) | |
4100 | ldrel.l_symndx = 1; | |
4101 | else | |
4102 | ldrel.l_symndx = 2; | |
4103 | } | |
4104 | else | |
aadf04f7 | 4105 | { |
28a0c103 | 4106 | if (h->ldindx < 0) |
aadf04f7 | 4107 | { |
28a0c103 ILT |
4108 | (*_bfd_error_handler) |
4109 | ("%s: `%s' in loader reloc but not loader sym", | |
4110 | bfd_get_filename (input_bfd), | |
4111 | h->root.root.string); | |
4112 | bfd_set_error (bfd_error_bad_value); | |
4113 | return false; | |
aadf04f7 | 4114 | } |
28a0c103 | 4115 | ldrel.l_symndx = h->ldindx; |
aadf04f7 | 4116 | } |
28a0c103 ILT |
4117 | ldrel.l_rtype = (irel->r_size << 8) | irel->r_type; |
4118 | ldrel.l_rsecnm = o->output_section->target_index; | |
4119 | if (xcoff_hash_table (finfo->info)->textro | |
4120 | && (o->output_section->flags & SEC_CODE) != 0) | |
aadf04f7 | 4121 | { |
28a0c103 ILT |
4122 | (*_bfd_error_handler) |
4123 | ("%s: loader reloc in read-only section %s", | |
4124 | bfd_get_filename (input_bfd), | |
4125 | bfd_get_section_name (finfo->output_bfd, | |
4126 | o->output_section)); | |
4127 | bfd_set_error (bfd_error_invalid_operation); | |
4128 | return false; | |
aadf04f7 | 4129 | } |
28a0c103 ILT |
4130 | xcoff_swap_ldrel_out (output_bfd, &ldrel, |
4131 | finfo->ldrel); | |
4132 | BFD_ASSERT (sizeof (struct external_ldrel) == LDRELSZ); | |
4133 | ++finfo->ldrel; | |
aadf04f7 SS |
4134 | } |
4135 | } | |
4136 | ||
4137 | o->output_section->reloc_count += o->reloc_count; | |
4138 | } | |
4139 | ||
4140 | /* Write out the modified section contents. */ | |
4141 | if (! bfd_set_section_contents (output_bfd, o->output_section, | |
4142 | contents, o->output_offset, | |
4143 | (o->_cooked_size != 0 | |
4144 | ? o->_cooked_size | |
4145 | : o->_raw_size))) | |
4146 | return false; | |
4147 | } | |
4148 | ||
4149 | obj_coff_keep_syms (input_bfd) = keep_syms; | |
4150 | ||
4151 | if (! finfo->info->keep_memory) | |
4152 | { | |
4153 | if (! _bfd_coff_free_symbols (input_bfd)) | |
4154 | return false; | |
4155 | } | |
4156 | ||
4157 | return true; | |
4158 | } | |
4159 | ||
28a0c103 ILT |
4160 | #undef N_TMASK |
4161 | #undef N_BTSHFT | |
4162 | ||
aadf04f7 SS |
4163 | /* Write out a non-XCOFF global symbol. */ |
4164 | ||
4165 | static boolean | |
4166 | xcoff_write_global_symbol (h, p) | |
4167 | struct xcoff_link_hash_entry *h; | |
4168 | PTR p; | |
4169 | { | |
4170 | struct xcoff_final_link_info *finfo = (struct xcoff_final_link_info *) p; | |
4171 | bfd *output_bfd; | |
4172 | bfd_byte *outsym; | |
4173 | struct internal_syment isym; | |
4174 | union internal_auxent aux; | |
4175 | ||
28a0c103 ILT |
4176 | output_bfd = finfo->output_bfd; |
4177 | ||
4178 | /* If this symbol was garbage collected, just skip it. */ | |
4179 | if (xcoff_hash_table (finfo->info)->gc | |
4180 | && (h->flags & XCOFF_MARK) == 0) | |
4181 | return true; | |
4182 | ||
4183 | /* If we need a .loader section entry, write it out. */ | |
4184 | if (h->ldsym != NULL) | |
4185 | { | |
4186 | struct internal_ldsym *ldsym; | |
4187 | bfd *impbfd; | |
4188 | ||
4189 | ldsym = h->ldsym; | |
4190 | ||
4191 | if (h->root.type == bfd_link_hash_undefined | |
4192 | || h->root.type == bfd_link_hash_undefweak) | |
4193 | { | |
4194 | ldsym->l_value = 0; | |
4195 | ldsym->l_scnum = N_UNDEF; | |
4196 | ldsym->l_smtype = XTY_ER; | |
4197 | impbfd = h->root.u.undef.abfd; | |
4198 | } | |
4199 | else if (h->root.type == bfd_link_hash_defined | |
4200 | || h->root.type == bfd_link_hash_defweak) | |
4201 | { | |
4202 | asection *sec; | |
4203 | ||
4204 | sec = h->root.u.def.section; | |
4205 | ldsym->l_value = (sec->output_section->vma | |
4206 | + sec->output_offset | |
4207 | + h->root.u.def.value); | |
4208 | ldsym->l_scnum = sec->output_section->target_index; | |
4209 | ldsym->l_smtype = XTY_SD; | |
4210 | impbfd = sec->owner; | |
4211 | } | |
4212 | else | |
4213 | abort (); | |
4214 | ||
4215 | if (((h->flags & XCOFF_DEF_REGULAR) == 0 | |
4216 | && (h->flags & XCOFF_REF_DYNAMIC) != 0) | |
4217 | || (h->flags & XCOFF_IMPORT) != 0) | |
4218 | ldsym->l_smtype |= L_IMPORT; | |
4219 | if (((h->flags & XCOFF_DEF_REGULAR) != 0 | |
4220 | && (h->flags & XCOFF_REF_DYNAMIC) != 0) | |
4221 | || (h->flags & XCOFF_EXPORT) != 0) | |
4222 | ldsym->l_smtype |= L_EXPORT; | |
4223 | if ((h->flags & XCOFF_ENTRY) != 0) | |
4224 | ldsym->l_smtype |= L_ENTRY; | |
4225 | ||
4226 | ldsym->l_smclas = h->smclas; | |
4227 | ||
4228 | if (ldsym->l_ifile == (bfd_size_type) -1) | |
4229 | ldsym->l_ifile = 0; | |
4230 | else if (ldsym->l_ifile == 0) | |
4231 | { | |
4232 | if ((ldsym->l_smtype & L_IMPORT) == 0) | |
4233 | ldsym->l_ifile = 0; | |
4234 | else if (impbfd == NULL) | |
4235 | ldsym->l_ifile = 0; | |
4236 | else | |
4237 | { | |
4238 | BFD_ASSERT (impbfd->xvec == output_bfd->xvec); | |
4239 | ldsym->l_ifile = xcoff_data (impbfd)->import_file_id; | |
4240 | } | |
4241 | } | |
4242 | ||
4243 | ldsym->l_parm = 0; | |
4244 | ||
4245 | BFD_ASSERT (h->ldindx >= 0); | |
4246 | BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym)); | |
4247 | xcoff_swap_ldsym_out (output_bfd, ldsym, finfo->ldsym + h->ldindx - 3); | |
4248 | h->ldsym = NULL; | |
4249 | } | |
4250 | ||
4251 | /* If this symbol needs global linkage code, write it out. */ | |
4252 | if (h->root.type == bfd_link_hash_defined | |
4253 | && (h->root.u.def.section | |
4254 | == xcoff_hash_table (finfo->info)->linkage_section)) | |
4255 | { | |
4256 | bfd_byte *p; | |
4257 | bfd_vma tocoff; | |
4258 | unsigned int i; | |
4259 | ||
4260 | p = h->root.u.def.section->contents + h->root.u.def.value; | |
4261 | ||
4262 | /* The first instruction in the global linkage code loads a | |
4263 | specific TOC element. */ | |
4264 | tocoff = (h->descriptor->toc_section->output_section->vma | |
4265 | + h->descriptor->toc_section->output_offset | |
4266 | + h->descriptor->toc_offset | |
4267 | - xcoff_data (output_bfd)->toc); | |
4268 | bfd_put_32 (output_bfd, XCOFF_GLINK_FIRST | tocoff, p); | |
4269 | for (i = 0, p += 4; | |
4270 | i < sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]; | |
4271 | i++, p += 4) | |
4272 | bfd_put_32 (output_bfd, xcoff_glink_code[i], p); | |
4273 | } | |
4274 | ||
4275 | /* If we created a TOC entry for this symbol, write out the required | |
4276 | relocs. */ | |
4277 | if ((h->flags & XCOFF_SET_TOC) != 0) | |
4278 | { | |
4279 | asection *tocsec; | |
4280 | asection *osec; | |
4281 | int oindx; | |
4282 | struct internal_reloc *irel; | |
4283 | struct internal_ldrel ldrel; | |
4284 | ||
4285 | tocsec = h->toc_section; | |
4286 | osec = tocsec->output_section; | |
4287 | oindx = osec->target_index; | |
4288 | irel = finfo->section_info[oindx].relocs + osec->reloc_count; | |
4289 | irel->r_vaddr = (osec->vma | |
4290 | + tocsec->output_offset | |
4291 | + h->toc_offset); | |
4292 | if (h->indx >= 0) | |
4293 | irel->r_symndx = h->indx; | |
4294 | else | |
4295 | { | |
4296 | h->indx = -2; | |
4297 | irel->r_symndx = obj_raw_syment_count (output_bfd); | |
4298 | } | |
4299 | irel->r_type = R_POS; | |
4300 | irel->r_size = 31; | |
4301 | finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL; | |
4302 | ++osec->reloc_count; | |
4303 | ||
4304 | BFD_ASSERT (h->ldindx >= 0); | |
4305 | ldrel.l_vaddr = irel->r_vaddr; | |
4306 | ldrel.l_symndx = h->ldindx; | |
4307 | ldrel.l_rtype = (31 << 8) | R_POS; | |
4308 | ldrel.l_rsecnm = oindx; | |
4309 | xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel); | |
4310 | ++finfo->ldrel; | |
4311 | } | |
4312 | ||
4313 | if (h->indx >= 0) | |
4314 | return true; | |
4315 | ||
4316 | if (h->indx != -2 | |
4317 | && (finfo->info->strip == strip_all | |
4318 | || (finfo->info->strip == strip_some | |
4319 | && (bfd_hash_lookup (finfo->info->keep_hash, | |
4320 | h->root.root.string, false, false) | |
4321 | == NULL)))) | |
4322 | return true; | |
4323 | ||
4324 | if (h->indx != -2 | |
4325 | && (h->flags & (XCOFF_REF_REGULAR | XCOFF_DEF_REGULAR)) == 0) | |
aadf04f7 SS |
4326 | return true; |
4327 | ||
aadf04f7 SS |
4328 | outsym = finfo->outsyms; |
4329 | ||
4330 | memset (&aux, 0, sizeof aux); | |
4331 | ||
4332 | h->indx = obj_raw_syment_count (output_bfd); | |
4333 | ||
4334 | if (strlen (h->root.root.string) <= SYMNMLEN) | |
4335 | strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN); | |
4336 | else | |
4337 | { | |
4338 | boolean hash; | |
4339 | bfd_size_type indx; | |
4340 | ||
4341 | hash = true; | |
4342 | if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) | |
4343 | hash = false; | |
4344 | indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash, | |
4345 | false); | |
4346 | if (indx == (bfd_size_type) -1) | |
4347 | return false; | |
4348 | isym._n._n_n._n_zeroes = 0; | |
4349 | isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; | |
4350 | } | |
4351 | ||
4352 | if (h->root.type == bfd_link_hash_undefined | |
4353 | || h->root.type == bfd_link_hash_undefweak) | |
4354 | { | |
4355 | isym.n_value = 0; | |
4356 | isym.n_scnum = N_UNDEF; | |
4357 | isym.n_sclass = C_EXT; | |
4358 | aux.x_csect.x_smtyp = XTY_ER; | |
4359 | } | |
4360 | else if (h->root.type == bfd_link_hash_defined | |
4361 | || h->root.type == bfd_link_hash_defweak) | |
4362 | { | |
4363 | isym.n_value = (h->root.u.def.section->output_section->vma | |
4364 | + h->root.u.def.section->output_offset | |
4365 | + h->root.u.def.value); | |
4366 | isym.n_scnum = h->root.u.def.section->output_section->target_index; | |
4367 | isym.n_sclass = C_HIDEXT; | |
4368 | aux.x_csect.x_smtyp = XTY_SD; | |
4369 | /* I don't know what the csect length should be in this case. */ | |
4370 | } | |
4371 | else | |
4372 | abort (); | |
4373 | ||
4374 | isym.n_type = T_NULL; | |
4375 | isym.n_numaux = 1; | |
4376 | ||
4377 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); | |
4378 | outsym += bfd_coff_symesz (output_bfd); | |
4379 | ||
28a0c103 | 4380 | aux.x_csect.x_smclas = h->smclas; |
aadf04f7 SS |
4381 | |
4382 | bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, isym.n_sclass, 0, 1, | |
4383 | (PTR) outsym); | |
4384 | outsym += bfd_coff_auxesz (output_bfd); | |
4385 | ||
28a0c103 ILT |
4386 | if (h->root.type == bfd_link_hash_defined |
4387 | || h->root.type == bfd_link_hash_defweak) | |
aadf04f7 SS |
4388 | { |
4389 | /* We just output an SD symbol. Now output an LD symbol. */ | |
4390 | ||
4391 | h->indx += 2; | |
4392 | ||
4393 | isym.n_sclass = C_EXT; | |
4394 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); | |
4395 | outsym += bfd_coff_symesz (output_bfd); | |
4396 | ||
4397 | aux.x_csect.x_smtyp = XTY_LD; | |
4398 | aux.x_csect.x_scnlen.l = obj_raw_syment_count (output_bfd); | |
4399 | ||
4400 | bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, C_EXT, 0, 1, | |
4401 | (PTR) outsym); | |
4402 | outsym += bfd_coff_auxesz (output_bfd); | |
4403 | } | |
4404 | ||
4405 | if (bfd_seek (output_bfd, | |
4406 | (obj_sym_filepos (output_bfd) | |
4407 | + (obj_raw_syment_count (output_bfd) | |
4408 | * bfd_coff_symesz (output_bfd))), | |
4409 | SEEK_SET) != 0 | |
4410 | || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, output_bfd) | |
4411 | != (bfd_size_type) (outsym - finfo->outsyms))) | |
4412 | return false; | |
4413 | obj_raw_syment_count (output_bfd) += | |
4414 | (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd); | |
4415 | ||
4416 | return true; | |
4417 | } | |
4418 | ||
4419 | /* Handle a link order which is supposed to generate a reloc. */ | |
4420 | ||
4421 | static boolean | |
4422 | xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order) | |
4423 | bfd *output_bfd; | |
4424 | struct xcoff_final_link_info *finfo; | |
4425 | asection *output_section; | |
4426 | struct bfd_link_order *link_order; | |
4427 | { | |
4428 | reloc_howto_type *howto; | |
4429 | struct internal_reloc *irel; | |
4430 | struct xcoff_link_hash_entry **rel_hash_ptr; | |
4431 | ||
4432 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
4433 | if (howto == NULL) | |
4434 | { | |
4435 | bfd_set_error (bfd_error_bad_value); | |
4436 | return false; | |
4437 | } | |
4438 | ||
4439 | if (link_order->u.reloc.p->addend != 0) | |
4440 | { | |
4441 | bfd_size_type size; | |
4442 | bfd_byte *buf; | |
4443 | bfd_reloc_status_type rstat; | |
4444 | boolean ok; | |
4445 | ||
4446 | size = bfd_get_reloc_size (howto); | |
4447 | buf = (bfd_byte *) bfd_zmalloc (size); | |
4448 | if (buf == NULL) | |
4449 | { | |
4450 | bfd_set_error (bfd_error_no_memory); | |
4451 | return false; | |
4452 | } | |
4453 | ||
4454 | rstat = _bfd_relocate_contents (howto, output_bfd, | |
4455 | link_order->u.reloc.p->addend, buf); | |
4456 | switch (rstat) | |
4457 | { | |
4458 | case bfd_reloc_ok: | |
4459 | break; | |
4460 | default: | |
4461 | case bfd_reloc_outofrange: | |
4462 | abort (); | |
4463 | case bfd_reloc_overflow: | |
4464 | if (! ((*finfo->info->callbacks->reloc_overflow) | |
4465 | (finfo->info, | |
4466 | (link_order->type == bfd_section_reloc_link_order | |
4467 | ? bfd_section_name (output_bfd, | |
4468 | link_order->u.reloc.p->u.section) | |
4469 | : link_order->u.reloc.p->u.name), | |
4470 | howto->name, link_order->u.reloc.p->addend, | |
4471 | (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) | |
4472 | { | |
4473 | free (buf); | |
4474 | return false; | |
4475 | } | |
4476 | break; | |
4477 | } | |
4478 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
4479 | (file_ptr) link_order->offset, size); | |
4480 | free (buf); | |
4481 | if (! ok) | |
4482 | return false; | |
4483 | } | |
4484 | ||
4485 | /* Store the reloc information in the right place. It will get | |
4486 | swapped and written out at the end of the final_link routine. */ | |
4487 | ||
4488 | irel = (finfo->section_info[output_section->target_index].relocs | |
4489 | + output_section->reloc_count); | |
4490 | rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes | |
4491 | + output_section->reloc_count); | |
4492 | ||
4493 | memset (irel, 0, sizeof (struct internal_reloc)); | |
4494 | *rel_hash_ptr = NULL; | |
4495 | ||
4496 | irel->r_vaddr = output_section->vma + link_order->offset; | |
4497 | ||
4498 | if (link_order->type == bfd_section_reloc_link_order) | |
4499 | { | |
4500 | /* We need to somehow locate a symbol in the right section. The | |
4501 | symbol must either have a value of zero, or we must adjust | |
4502 | the addend by the value of the symbol. FIXME: Write this | |
4503 | when we need it. The old linker couldn't handle this anyhow. */ | |
4504 | abort (); | |
4505 | *rel_hash_ptr = NULL; | |
4506 | irel->r_symndx = 0; | |
4507 | } | |
4508 | else | |
4509 | { | |
4510 | struct xcoff_link_hash_entry *h; | |
4511 | ||
4512 | h = xcoff_link_hash_lookup (xcoff_hash_table (finfo->info), | |
4513 | link_order->u.reloc.p->u.name, | |
4514 | false, false, true); | |
4515 | if (h != NULL) | |
4516 | { | |
4517 | if (h->indx >= 0) | |
4518 | irel->r_symndx = h->indx; | |
4519 | else | |
4520 | { | |
4521 | /* Set the index to -2 to force this symbol to get | |
4522 | written out. */ | |
4523 | h->indx = -2; | |
4524 | *rel_hash_ptr = h; | |
4525 | irel->r_symndx = 0; | |
4526 | } | |
4527 | } | |
4528 | else | |
4529 | { | |
4530 | if (! ((*finfo->info->callbacks->unattached_reloc) | |
4531 | (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
4532 | (asection *) NULL, (bfd_vma) 0))) | |
4533 | return false; | |
4534 | irel->r_symndx = 0; | |
4535 | } | |
4536 | } | |
4537 | ||
4538 | irel->r_type = howto->type; | |
4539 | irel->r_size = howto->bitsize - 1; | |
4540 | if (howto->complain_on_overflow == complain_overflow_signed) | |
4541 | irel->r_size |= 0x80; | |
4542 | ||
4543 | ++output_section->reloc_count; | |
4544 | ||
4545 | return true; | |
4546 | } | |
4547 | ||
4548 | /* Sort relocs by VMA. This is called via qsort. */ | |
4549 | ||
4550 | static int | |
4551 | xcoff_sort_relocs (p1, p2) | |
4552 | const PTR p1; | |
4553 | const PTR p2; | |
4554 | { | |
4555 | const struct internal_reloc *r1 = (const struct internal_reloc *) p1; | |
4556 | const struct internal_reloc *r2 = (const struct internal_reloc *) p2; | |
4557 | ||
4558 | if (r1->r_vaddr > r2->r_vaddr) | |
4559 | return 1; | |
4560 | else if (r1->r_vaddr < r2->r_vaddr) | |
4561 | return -1; | |
4562 | else | |
4563 | return 0; | |
4564 | } | |
4565 | ||
4566 | /* This is the relocation function for the RS/6000/POWER/PowerPC. | |
4567 | This is currently the only processor which uses XCOFF; I hope that | |
4568 | will never change. */ | |
4569 | ||
4570 | boolean | |
4571 | _bfd_ppc_xcoff_relocate_section (output_bfd, info, input_bfd, | |
4572 | input_section, contents, relocs, syms, | |
4573 | sections) | |
4574 | bfd *output_bfd; | |
4575 | struct bfd_link_info *info; | |
4576 | bfd *input_bfd; | |
4577 | asection *input_section; | |
4578 | bfd_byte *contents; | |
4579 | struct internal_reloc *relocs; | |
4580 | struct internal_syment *syms; | |
4581 | asection **sections; | |
4582 | { | |
4583 | struct internal_reloc *rel; | |
4584 | struct internal_reloc *relend; | |
4585 | ||
4586 | rel = relocs; | |
4587 | relend = rel + input_section->reloc_count; | |
4588 | for (; rel < relend; rel++) | |
4589 | { | |
4590 | long symndx; | |
4591 | struct xcoff_link_hash_entry *h; | |
4592 | struct internal_syment *sym; | |
4593 | bfd_vma addend; | |
4594 | bfd_vma val; | |
4595 | struct reloc_howto_struct howto; | |
4596 | bfd_reloc_status_type rstat; | |
4597 | ||
28a0c103 | 4598 | /* Relocation type R_REF is a special relocation type which is |
aadf04f7 SS |
4599 | merely used to prevent garbage collection from occurring for |
4600 | the csect including the symbol which it references. */ | |
28a0c103 | 4601 | if (rel->r_type == R_REF) |
aadf04f7 SS |
4602 | continue; |
4603 | ||
4604 | symndx = rel->r_symndx; | |
4605 | ||
4606 | if (symndx == -1) | |
4607 | { | |
4608 | h = NULL; | |
4609 | sym = NULL; | |
4610 | addend = 0; | |
4611 | } | |
4612 | else | |
4613 | { | |
4614 | h = obj_xcoff_sym_hashes (input_bfd)[symndx]; | |
4615 | sym = syms + symndx; | |
4616 | addend = - sym->n_value; | |
4617 | } | |
4618 | ||
4619 | /* We build the howto information on the fly. */ | |
4620 | ||
4621 | howto.type = rel->r_type; | |
4622 | howto.rightshift = 0; | |
4623 | howto.size = 2; | |
4624 | howto.bitsize = (rel->r_size & 0x1f) + 1; | |
4625 | howto.pc_relative = false; | |
4626 | howto.bitpos = 0; | |
4627 | if ((rel->r_size & 0x80) != 0) | |
4628 | howto.complain_on_overflow = complain_overflow_signed; | |
4629 | else | |
4630 | howto.complain_on_overflow = complain_overflow_bitfield; | |
4631 | howto.special_function = NULL; | |
4632 | howto.name = "internal"; | |
4633 | howto.partial_inplace = true; | |
4634 | if (howto.bitsize == 32) | |
4635 | howto.src_mask = howto.dst_mask = 0xffffffff; | |
4636 | else | |
4637 | { | |
4638 | howto.src_mask = howto.dst_mask = (1 << howto.bitsize) - 1; | |
4639 | if (howto.bitsize == 16) | |
4640 | howto.size = 1; | |
4641 | } | |
4642 | howto.pcrel_offset = false; | |
4643 | ||
4644 | val = 0; | |
4645 | ||
4646 | if (h == NULL) | |
4647 | { | |
4648 | asection *sec; | |
4649 | ||
4650 | if (symndx == -1) | |
4651 | { | |
4652 | sec = bfd_abs_section_ptr; | |
4653 | val = 0; | |
4654 | } | |
4655 | else | |
4656 | { | |
4657 | sec = sections[symndx]; | |
4658 | val = (sec->output_section->vma | |
4659 | + sec->output_offset | |
4660 | + sym->n_value | |
4661 | - sec->vma); | |
4662 | } | |
4663 | } | |
4664 | else | |
4665 | { | |
4666 | if (h->root.type == bfd_link_hash_defined | |
4667 | || h->root.type == bfd_link_hash_defweak) | |
4668 | { | |
4669 | asection *sec; | |
4670 | ||
4671 | sec = h->root.u.def.section; | |
4672 | val = (h->root.u.def.value | |
4673 | + sec->output_section->vma | |
4674 | + sec->output_offset); | |
4675 | } | |
28a0c103 ILT |
4676 | else if ((h->flags & XCOFF_REF_DYNAMIC) != 0 |
4677 | || (h->flags & XCOFF_IMPORT) != 0) | |
4678 | { | |
4679 | /* Every symbol in a shared object is defined somewhere. */ | |
4680 | val = 0; | |
4681 | } | |
aadf04f7 SS |
4682 | else if (! info->relocateable) |
4683 | { | |
4684 | if (! ((*info->callbacks->undefined_symbol) | |
4685 | (info, h->root.root.string, input_bfd, input_section, | |
4686 | rel->r_vaddr - input_section->vma))) | |
4687 | return false; | |
4688 | } | |
4689 | } | |
4690 | ||
4691 | /* I took the relocation type definitions from two documents: | |
4692 | the PowerPC AIX Version 4 Application Binary Interface, First | |
4693 | Edition (April 1992), and the PowerOpen ABI, Big-Endian | |
4694 | 32-Bit Hardware Implementation (June 30, 1994). Differences | |
4695 | between the documents are noted below. */ | |
4696 | ||
4697 | switch (rel->r_type) | |
4698 | { | |
28a0c103 ILT |
4699 | case R_RTB: |
4700 | case R_RRTBI: | |
4701 | case R_RRTBA: | |
aadf04f7 SS |
4702 | /* These relocs are defined by the PowerPC ABI to be |
4703 | relative branches which use half of the difference | |
4704 | between the symbol and the program counter. I can't | |
4705 | quite figure out when this is useful. These relocs are | |
4706 | not defined by the PowerOpen ABI. */ | |
4707 | default: | |
4708 | (*_bfd_error_handler) | |
4709 | ("%s: unsupported relocation type 0x%02x", | |
4710 | bfd_get_filename (input_bfd), (unsigned int) rel->r_type); | |
4711 | bfd_set_error (bfd_error_bad_value); | |
4712 | return false; | |
28a0c103 | 4713 | case R_POS: |
aadf04f7 SS |
4714 | /* Simple positive relocation. */ |
4715 | break; | |
28a0c103 | 4716 | case R_NEG: |
aadf04f7 SS |
4717 | /* Simple negative relocation. */ |
4718 | val = - val; | |
4719 | break; | |
28a0c103 | 4720 | case R_REL: |
aadf04f7 SS |
4721 | /* Simple PC relative relocation. */ |
4722 | howto.pc_relative = true; | |
4723 | break; | |
28a0c103 | 4724 | case R_TOC: |
aadf04f7 SS |
4725 | /* TOC relative relocation. The value in the instruction in |
4726 | the input file is the offset from the input file TOC to | |
4727 | the desired location. We want the offset from the final | |
4728 | TOC to the desired location. We have: | |
4729 | isym = iTOC + in | |
4730 | iinsn = in + o | |
4731 | osym = oTOC + on | |
4732 | oinsn = on + o | |
4733 | so we must change insn by on - in. | |
4734 | */ | |
28a0c103 | 4735 | case R_GL: |
aadf04f7 SS |
4736 | /* Global linkage relocation. The value of this relocation |
4737 | is the address of the entry in the TOC section. */ | |
28a0c103 | 4738 | case R_TCL: |
aadf04f7 | 4739 | /* Local object TOC address. I can't figure out the |
28a0c103 ILT |
4740 | difference between this and case R_GL. */ |
4741 | case R_TRL: | |
aadf04f7 SS |
4742 | /* TOC relative relocation. A TOC relative load instruction |
4743 | which may be changed to a load address instruction. | |
4744 | FIXME: We don't currently implement this optimization. */ | |
28a0c103 | 4745 | case R_TRLA: |
aadf04f7 SS |
4746 | /* TOC relative relocation. This is a TOC relative load |
4747 | address instruction which may be changed to a load | |
4748 | instruction. FIXME: I don't know if this is the correct | |
4749 | implementation. */ | |
28a0c103 ILT |
4750 | if (h != NULL && h->toc_section == NULL) |
4751 | { | |
4752 | (*_bfd_error_handler) | |
4753 | ("%s: TOC reloc at 0x%x to symbol `%s' with no TOC entry", | |
4754 | bfd_get_filename (input_bfd), rel->r_vaddr, | |
4755 | h->root.root.string); | |
4756 | bfd_set_error (bfd_error_bad_value); | |
4757 | return false; | |
4758 | } | |
4759 | if (h != NULL) | |
4760 | val = (h->toc_section->output_section->vma | |
4761 | + h->toc_section->output_offset | |
4762 | + h->toc_offset); | |
aadf04f7 SS |
4763 | val = ((val - xcoff_data (output_bfd)->toc) |
4764 | - (sym->n_value - xcoff_data (input_bfd)->toc)); | |
4765 | addend = 0; | |
4766 | break; | |
28a0c103 | 4767 | case R_BA: |
aadf04f7 SS |
4768 | /* Absolute branch. We don't want to mess with the lower |
4769 | two bits of the instruction. */ | |
28a0c103 | 4770 | case R_CAI: |
aadf04f7 SS |
4771 | /* The PowerPC ABI defines this as an absolute call which |
4772 | may be modified to become a relative call. The PowerOpen | |
4773 | ABI does not define this relocation type. */ | |
28a0c103 | 4774 | case R_RBA: |
aadf04f7 SS |
4775 | /* Absolute branch which may be modified to become a |
4776 | relative branch. */ | |
28a0c103 | 4777 | case R_RBAC: |
aadf04f7 SS |
4778 | /* The PowerPC ABI defines this as an absolute branch to a |
4779 | fixed address which may be modified to an absolute branch | |
4780 | to a symbol. The PowerOpen ABI does not define this | |
4781 | relocation type. */ | |
28a0c103 | 4782 | case R_RBRC: |
aadf04f7 SS |
4783 | /* The PowerPC ABI defines this as an absolute branch to a |
4784 | fixed address which may be modified to a relative branch. | |
4785 | The PowerOpen ABI does not define this relocation type. */ | |
4786 | howto.src_mask &= ~3; | |
4787 | howto.dst_mask = howto.src_mask; | |
4788 | break; | |
28a0c103 | 4789 | case R_BR: |
aadf04f7 SS |
4790 | /* Relative branch. We don't want to mess with the lower |
4791 | two bits of the instruction. */ | |
28a0c103 | 4792 | case R_CREL: |
aadf04f7 SS |
4793 | /* The PowerPC ABI defines this as a relative call which may |
4794 | be modified to become an absolute call. The PowerOpen | |
4795 | ABI does not define this relocation type. */ | |
28a0c103 | 4796 | case R_RBR: |
aadf04f7 SS |
4797 | /* A relative branch which may be modified to become an |
4798 | absolute branch. FIXME: We don't implement this, | |
4799 | although we should for symbols of storage mapping class | |
4800 | XMC_XO. */ | |
4801 | howto.pc_relative = true; | |
4802 | howto.src_mask &= ~3; | |
4803 | howto.dst_mask = howto.src_mask; | |
4804 | break; | |
28a0c103 | 4805 | case R_RL: |
aadf04f7 SS |
4806 | /* The PowerPC AIX ABI describes this as a load which may be |
4807 | changed to a load address. The PowerOpen ABI says this | |
28a0c103 | 4808 | is the same as case R_POS. */ |
aadf04f7 | 4809 | break; |
28a0c103 | 4810 | case R_RLA: |
aadf04f7 SS |
4811 | /* The PowerPC AIX ABI describes this as a load address |
4812 | which may be changed to a load. The PowerOpen ABI says | |
28a0c103 | 4813 | this is the same as R_POS. */ |
aadf04f7 SS |
4814 | break; |
4815 | } | |
4816 | ||
28a0c103 ILT |
4817 | /* If we see an R_BR or R_RBR reloc which is jumping to global |
4818 | linkage code, and it is followed by an appropriate cror nop | |
4819 | instruction, we replace the cror with lwz r2,20(r1). This | |
4820 | restores the TOC after the glink code. Contrariwise, if the | |
4821 | call is followed by a lwz r2,20(r1), but the call is not | |
4822 | going to global linkage code, we can replace the load with a | |
4823 | cror. */ | |
4824 | if ((rel->r_type == R_BR || rel->r_type == R_RBR) | |
4825 | && h != NULL | |
4826 | && h->root.type == bfd_link_hash_defined | |
4827 | && (rel->r_vaddr - input_section->vma + 8 | |
4828 | <= input_section->_cooked_size)) | |
4829 | { | |
4830 | bfd_byte *pnext; | |
4831 | unsigned long next; | |
4832 | ||
4833 | pnext = contents + (rel->r_vaddr - input_section->vma) + 4; | |
4834 | next = bfd_get_32 (input_bfd, pnext); | |
4835 | if (h->smclas == XMC_GL) | |
4836 | { | |
4837 | if (next == 0x4def7b82 /* cror 15,15,15 */ | |
4838 | || next == 0x4ffffb82) /* cror 31,31,31 */ | |
4839 | bfd_put_32 (input_bfd, 0x80410014, pnext); /* lwz r1,20(r1) */ | |
4840 | } | |
4841 | else | |
4842 | { | |
4843 | if (next == 0x80410014) /* lwz r1,20(r1) */ | |
4844 | bfd_put_32 (input_bfd, 0x4ffffb82, pnext); /* cror 31,31,31 */ | |
4845 | } | |
4846 | } | |
4847 | ||
4848 | /* A PC relative reloc includes the section address. */ | |
4849 | if (howto.pc_relative) | |
4850 | addend += input_section->vma; | |
4851 | ||
aadf04f7 SS |
4852 | rstat = _bfd_final_link_relocate (&howto, input_bfd, input_section, |
4853 | contents, | |
4854 | rel->r_vaddr - input_section->vma, | |
4855 | val, addend); | |
4856 | ||
4857 | switch (rstat) | |
4858 | { | |
4859 | default: | |
4860 | abort (); | |
4861 | case bfd_reloc_ok: | |
4862 | break; | |
4863 | case bfd_reloc_overflow: | |
4864 | { | |
4865 | const char *name; | |
4866 | char buf[SYMNMLEN + 1]; | |
4867 | char howto_name[10]; | |
4868 | ||
4869 | if (symndx == -1) | |
4870 | name = "*ABS*"; | |
4871 | else if (h != NULL) | |
4872 | name = h->root.root.string; | |
4873 | else | |
4874 | { | |
4875 | name = _bfd_coff_internal_syment_name (input_bfd, sym, buf); | |
4876 | if (name == NULL) | |
4877 | return false; | |
4878 | } | |
4879 | sprintf (howto_name, "0x%02x", rel->r_type); | |
4880 | ||
4881 | if (! ((*info->callbacks->reloc_overflow) | |
4882 | (info, name, howto_name, (bfd_vma) 0, input_bfd, | |
4883 | input_section, rel->r_vaddr - input_section->vma))) | |
4884 | return false; | |
4885 | } | |
4886 | } | |
4887 | } | |
4888 | ||
4889 | return true; | |
4890 | } |