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252b5132 | 1 | /* POWER/PowerPC XCOFF linker support. |
cdb72c32 | 2 | Copyright 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc. |
252b5132 RH |
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. */ | |
29 | ||
30 | #define STRING_SIZE_SIZE (4) | |
31 | ||
32 | /* In order to support linking different object file formats into an | |
33 | XCOFF format, we need to be able to determine whether a particular | |
34 | bfd_target is an XCOFF vector. FIXME: We need to rethink this | |
35 | whole approach. */ | |
36 | #define XCOFF_XVECP(xv) \ | |
37 | (strcmp ((xv)->name, "aixcoff-rs6000") == 0 \ | |
7f6d05e8 | 38 | || strcmp ((xv)->name, "aixcoff64-rs6000") == 0 \ |
252b5132 RH |
39 | || strcmp ((xv)->name, "xcoff-powermac") == 0) |
40 | ||
41 | /* Get the XCOFF hash table entries for a BFD. */ | |
42 | #define obj_xcoff_sym_hashes(bfd) \ | |
43 | ((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd)) | |
44 | ||
45 | /* XCOFF relocation types. These probably belong in a header file | |
46 | somewhere. The relocations are described in the function | |
47 | _bfd_ppc_xcoff_relocate_section in this file. */ | |
48 | ||
49 | #define R_POS (0x00) | |
50 | #define R_NEG (0x01) | |
51 | #define R_REL (0x02) | |
52 | #define R_TOC (0x03) | |
53 | #define R_RTB (0x04) | |
54 | #define R_GL (0x05) | |
55 | #define R_TCL (0x06) | |
56 | #define R_BA (0x08) | |
57 | #define R_BR (0x0a) | |
58 | #define R_RL (0x0c) | |
59 | #define R_RLA (0x0d) | |
60 | #define R_REF (0x0f) | |
61 | #define R_TRL (0x12) | |
62 | #define R_TRLA (0x13) | |
63 | #define R_RRTBI (0x14) | |
64 | #define R_RRTBA (0x15) | |
65 | #define R_CAI (0x16) | |
66 | #define R_CREL (0x17) | |
67 | #define R_RBA (0x18) | |
68 | #define R_RBAC (0x19) | |
69 | #define R_RBR (0x1a) | |
70 | #define R_RBRC (0x1b) | |
71 | ||
72 | /* The first word of global linkage code. This must be modified by | |
73 | filling in the correct TOC offset. */ | |
74 | ||
75 | #define XCOFF_GLINK_FIRST (0x81820000) /* lwz r12,0(r2) */ | |
76 | ||
77 | /* The remaining words of global linkage code. */ | |
78 | ||
79 | static unsigned long xcoff_glink_code[] = | |
80 | { | |
81 | 0x90410014, /* stw r2,20(r1) */ | |
82 | 0x800c0000, /* lwz r0,0(r12) */ | |
83 | 0x804c0004, /* lwz r2,4(r12) */ | |
84 | 0x7c0903a6, /* mtctr r0 */ | |
85 | 0x4e800420, /* bctr */ | |
86 | 0x0, /* start of traceback table */ | |
87 | 0x000c8000, /* traceback table */ | |
88 | 0x0 /* traceback table */ | |
89 | }; | |
90 | ||
91 | #define XCOFF_GLINK_SIZE \ | |
92 | (((sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]) * 4) + 4) | |
93 | ||
94 | /* We reuse the SEC_ROM flag as a mark flag for garbage collection. | |
95 | This flag will only be used on input sections. */ | |
96 | ||
97 | #define SEC_MARK (SEC_ROM) | |
98 | ||
99 | /* The ldhdr structure. This appears at the start of the .loader | |
100 | section. */ | |
101 | ||
102 | struct internal_ldhdr | |
103 | { | |
104 | /* The version number: currently always 1. */ | |
105 | unsigned long l_version; | |
106 | /* The number of symbol table entries. */ | |
107 | bfd_size_type l_nsyms; | |
108 | /* The number of relocation table entries. */ | |
109 | bfd_size_type l_nreloc; | |
110 | /* The length of the import file string table. */ | |
111 | bfd_size_type l_istlen; | |
112 | /* The number of import files. */ | |
113 | bfd_size_type l_nimpid; | |
114 | /* The offset from the start of the .loader section to the first | |
115 | entry in the import file table. */ | |
116 | bfd_size_type l_impoff; | |
117 | /* The length of the string table. */ | |
118 | bfd_size_type l_stlen; | |
119 | /* The offset from the start of the .loader section to the first | |
120 | entry in the string table. */ | |
121 | bfd_size_type l_stoff; | |
122 | }; | |
123 | ||
124 | struct external_ldhdr | |
125 | { | |
126 | bfd_byte l_version[4]; | |
127 | bfd_byte l_nsyms[4]; | |
128 | bfd_byte l_nreloc[4]; | |
129 | bfd_byte l_istlen[4]; | |
130 | bfd_byte l_nimpid[4]; | |
131 | bfd_byte l_impoff[4]; | |
132 | bfd_byte l_stlen[4]; | |
133 | bfd_byte l_stoff[4]; | |
134 | }; | |
135 | ||
136 | #define LDHDRSZ (8 * 4) | |
137 | ||
138 | /* The ldsym structure. This is used to represent a symbol in the | |
139 | .loader section. */ | |
140 | ||
141 | struct internal_ldsym | |
142 | { | |
143 | union | |
144 | { | |
145 | /* The symbol name if <= SYMNMLEN characters. */ | |
146 | char _l_name[SYMNMLEN]; | |
147 | struct | |
148 | { | |
149 | /* Zero if the symbol name is more than SYMNMLEN characters. */ | |
150 | long _l_zeroes; | |
151 | /* The offset in the string table if the symbol name is more | |
152 | than SYMNMLEN characters. */ | |
153 | long _l_offset; | |
154 | } _l_l; | |
155 | } _l; | |
156 | /* The symbol value. */ | |
157 | bfd_vma l_value; | |
158 | /* The symbol section number. */ | |
159 | short l_scnum; | |
160 | /* The symbol type and flags. */ | |
161 | char l_smtype; | |
162 | /* The symbol storage class. */ | |
163 | char l_smclas; | |
164 | /* The import file ID. */ | |
165 | bfd_size_type l_ifile; | |
166 | /* Offset to the parameter type check string. */ | |
167 | bfd_size_type l_parm; | |
168 | }; | |
169 | ||
170 | struct external_ldsym | |
171 | { | |
172 | union | |
173 | { | |
174 | bfd_byte _l_name[SYMNMLEN]; | |
175 | struct | |
176 | { | |
177 | bfd_byte _l_zeroes[4]; | |
178 | bfd_byte _l_offset[4]; | |
179 | } _l_l; | |
180 | } _l; | |
181 | bfd_byte l_value[4]; | |
182 | bfd_byte l_scnum[2]; | |
183 | bfd_byte l_smtype[1]; | |
184 | bfd_byte l_smclas[1]; | |
185 | bfd_byte l_ifile[4]; | |
186 | bfd_byte l_parm[4]; | |
187 | }; | |
188 | ||
189 | #define LDSYMSZ (8 + 3 * 4 + 2 + 2) | |
190 | ||
191 | /* These flags are for the l_smtype field (the lower three bits are an | |
192 | XTY_* value). */ | |
193 | ||
194 | /* Imported symbol. */ | |
195 | #define L_IMPORT (0x40) | |
196 | /* Entry point. */ | |
197 | #define L_ENTRY (0x20) | |
198 | /* Exported symbol. */ | |
199 | #define L_EXPORT (0x10) | |
200 | ||
201 | /* The ldrel structure. This is used to represent a reloc in the | |
202 | .loader section. */ | |
203 | ||
204 | struct internal_ldrel | |
205 | { | |
206 | /* The reloc address. */ | |
207 | bfd_vma l_vaddr; | |
208 | /* The symbol table index in the .loader section symbol table. */ | |
209 | bfd_size_type l_symndx; | |
210 | /* The relocation type and size. */ | |
211 | short l_rtype; | |
212 | /* The section number this relocation applies to. */ | |
213 | short l_rsecnm; | |
214 | }; | |
215 | ||
216 | struct external_ldrel | |
217 | { | |
218 | bfd_byte l_vaddr[4]; | |
219 | bfd_byte l_symndx[4]; | |
220 | bfd_byte l_rtype[2]; | |
221 | bfd_byte l_rsecnm[2]; | |
222 | }; | |
223 | ||
224 | #define LDRELSZ (2 * 4 + 2 * 2) | |
225 | ||
226 | /* The list of import files. */ | |
227 | ||
228 | struct xcoff_import_file | |
229 | { | |
230 | /* The next entry in the list. */ | |
231 | struct xcoff_import_file *next; | |
232 | /* The path. */ | |
233 | const char *path; | |
234 | /* The file name. */ | |
235 | const char *file; | |
236 | /* The member name. */ | |
237 | const char *member; | |
238 | }; | |
239 | ||
240 | /* An entry in the XCOFF linker hash table. */ | |
241 | ||
242 | struct xcoff_link_hash_entry | |
243 | { | |
244 | struct bfd_link_hash_entry root; | |
245 | ||
246 | /* Symbol index in output file. Set to -1 initially. Set to -2 if | |
247 | there is a reloc against this symbol. */ | |
248 | long indx; | |
249 | ||
250 | /* If we have created a TOC entry for this symbol, this is the .tc | |
251 | section which holds it. */ | |
252 | asection *toc_section; | |
253 | ||
254 | union | |
255 | { | |
256 | /* If we have created a TOC entry (the XCOFF_SET_TOC flag is | |
257 | set), this is the offset in toc_section. */ | |
258 | bfd_vma toc_offset; | |
259 | /* If the TOC entry comes from an input file, this is set to the | |
260 | symbol index of the C_HIDEXT XMC_TC or XMC_TD symbol. */ | |
261 | long toc_indx; | |
262 | } u; | |
263 | ||
264 | /* If this symbol is a function entry point which is called, this | |
265 | field holds a pointer to the function descriptor. If this symbol | |
266 | is a function descriptor, this field holds a pointer to the | |
267 | function entry point. */ | |
268 | struct xcoff_link_hash_entry *descriptor; | |
269 | ||
270 | /* The .loader symbol table entry, if there is one. */ | |
271 | struct internal_ldsym *ldsym; | |
272 | ||
273 | /* If XCOFF_BUILT_LDSYM is set, this is the .loader symbol table | |
274 | index. If XCOFF_BUILD_LDSYM is clear, and XCOFF_IMPORT is set, | |
275 | this is the l_ifile value. */ | |
276 | long ldindx; | |
277 | ||
278 | /* Some linker flags. */ | |
279 | unsigned short flags; | |
280 | /* Symbol is referenced by a regular object. */ | |
281 | #define XCOFF_REF_REGULAR (01) | |
282 | /* Symbol is defined by a regular object. */ | |
283 | #define XCOFF_DEF_REGULAR (02) | |
284 | /* Symbol is defined by a dynamic object. */ | |
285 | #define XCOFF_DEF_DYNAMIC (04) | |
286 | /* Symbol is used in a reloc being copied into the .loader section. */ | |
287 | #define XCOFF_LDREL (010) | |
288 | /* Symbol is the entry point. */ | |
289 | #define XCOFF_ENTRY (020) | |
290 | /* Symbol is called; this is, it appears in a R_BR reloc. */ | |
291 | #define XCOFF_CALLED (040) | |
292 | /* Symbol needs the TOC entry filled in. */ | |
293 | #define XCOFF_SET_TOC (0100) | |
294 | /* Symbol is explicitly imported. */ | |
295 | #define XCOFF_IMPORT (0200) | |
296 | /* Symbol is explicitly exported. */ | |
297 | #define XCOFF_EXPORT (0400) | |
298 | /* Symbol has been processed by xcoff_build_ldsyms. */ | |
299 | #define XCOFF_BUILT_LDSYM (01000) | |
300 | /* Symbol is mentioned by a section which was not garbage collected. */ | |
301 | #define XCOFF_MARK (02000) | |
302 | /* Symbol size is recorded in size_list list from hash table. */ | |
303 | #define XCOFF_HAS_SIZE (04000) | |
304 | /* Symbol is a function descriptor. */ | |
305 | #define XCOFF_DESCRIPTOR (010000) | |
306 | /* Multiple definitions have been for the symbol. */ | |
307 | #define XCOFF_MULTIPLY_DEFINED (020000) | |
308 | ||
309 | /* The storage mapping class. */ | |
310 | unsigned char smclas; | |
311 | }; | |
312 | ||
313 | /* The XCOFF linker hash table. */ | |
314 | ||
315 | struct xcoff_link_hash_table | |
316 | { | |
317 | struct bfd_link_hash_table root; | |
318 | ||
319 | /* The .debug string hash table. We need to compute this while | |
320 | reading the input files, so that we know how large the .debug | |
321 | section will be before we assign section positions. */ | |
322 | struct bfd_strtab_hash *debug_strtab; | |
323 | ||
324 | /* The .debug section we will use for the final output. */ | |
325 | asection *debug_section; | |
326 | ||
327 | /* The .loader section we will use for the final output. */ | |
328 | asection *loader_section; | |
329 | ||
330 | /* A count of non TOC relative relocs which will need to be | |
331 | allocated in the .loader section. */ | |
332 | size_t ldrel_count; | |
333 | ||
334 | /* The .loader section header. */ | |
335 | struct internal_ldhdr ldhdr; | |
336 | ||
337 | /* The .gl section we use to hold global linkage code. */ | |
338 | asection *linkage_section; | |
339 | ||
340 | /* The .tc section we use to hold toc entries we build for global | |
341 | linkage code. */ | |
342 | asection *toc_section; | |
343 | ||
344 | /* The .ds section we use to hold function descriptors which we | |
345 | create for exported symbols. */ | |
346 | asection *descriptor_section; | |
347 | ||
348 | /* The list of import files. */ | |
349 | struct xcoff_import_file *imports; | |
350 | ||
351 | /* Required alignment of sections within the output file. */ | |
352 | unsigned long file_align; | |
353 | ||
354 | /* Whether the .text section must be read-only. */ | |
355 | boolean textro; | |
356 | ||
357 | /* Whether garbage collection was done. */ | |
358 | boolean gc; | |
359 | ||
360 | /* A linked list of symbols for which we have size information. */ | |
361 | struct xcoff_link_size_list | |
362 | { | |
363 | struct xcoff_link_size_list *next; | |
364 | struct xcoff_link_hash_entry *h; | |
365 | bfd_size_type size; | |
366 | } *size_list; | |
367 | ||
368 | /* Magic sections: _text, _etext, _data, _edata, _end, end. */ | |
369 | asection *special_sections[6]; | |
370 | }; | |
371 | ||
372 | /* Information we keep for each section in the output file during the | |
373 | final link phase. */ | |
374 | ||
375 | struct xcoff_link_section_info | |
376 | { | |
377 | /* The relocs to be output. */ | |
378 | struct internal_reloc *relocs; | |
379 | /* For each reloc against a global symbol whose index was not known | |
380 | when the reloc was handled, the global hash table entry. */ | |
381 | struct xcoff_link_hash_entry **rel_hashes; | |
382 | /* If there is a TOC relative reloc against a global symbol, and the | |
383 | index of the TOC symbol is not known when the reloc was handled, | |
384 | an entry is added to this linked list. This is not an array, | |
385 | like rel_hashes, because this case is quite uncommon. */ | |
386 | struct xcoff_toc_rel_hash | |
387 | { | |
388 | struct xcoff_toc_rel_hash *next; | |
389 | struct xcoff_link_hash_entry *h; | |
390 | struct internal_reloc *rel; | |
391 | } *toc_rel_hashes; | |
392 | }; | |
393 | ||
394 | /* Information that we pass around while doing the final link step. */ | |
395 | ||
396 | struct xcoff_final_link_info | |
397 | { | |
398 | /* General link information. */ | |
399 | struct bfd_link_info *info; | |
400 | /* Output BFD. */ | |
401 | bfd *output_bfd; | |
402 | /* Hash table for long symbol names. */ | |
403 | struct bfd_strtab_hash *strtab; | |
404 | /* Array of information kept for each output section, indexed by the | |
405 | target_index field. */ | |
406 | struct xcoff_link_section_info *section_info; | |
407 | /* Symbol index of last C_FILE symbol (-1 if none). */ | |
408 | long last_file_index; | |
409 | /* Contents of last C_FILE symbol. */ | |
410 | struct internal_syment last_file; | |
411 | /* Symbol index of TOC symbol. */ | |
412 | long toc_symindx; | |
413 | /* Start of .loader symbols. */ | |
414 | struct external_ldsym *ldsym; | |
415 | /* Next .loader reloc to swap out. */ | |
416 | struct external_ldrel *ldrel; | |
417 | /* File position of start of line numbers. */ | |
418 | file_ptr line_filepos; | |
419 | /* Buffer large enough to hold swapped symbols of any input file. */ | |
420 | struct internal_syment *internal_syms; | |
421 | /* Buffer large enough to hold output indices of symbols of any | |
422 | input file. */ | |
423 | long *sym_indices; | |
424 | /* Buffer large enough to hold output symbols for any input file. */ | |
425 | bfd_byte *outsyms; | |
426 | /* Buffer large enough to hold external line numbers for any input | |
427 | section. */ | |
428 | bfd_byte *linenos; | |
429 | /* Buffer large enough to hold any input section. */ | |
430 | bfd_byte *contents; | |
431 | /* Buffer large enough to hold external relocs of any input section. */ | |
432 | bfd_byte *external_relocs; | |
433 | }; | |
434 | ||
435 | static void xcoff_swap_ldhdr_in | |
436 | PARAMS ((bfd *, const struct external_ldhdr *, struct internal_ldhdr *)); | |
437 | static void xcoff_swap_ldhdr_out | |
438 | PARAMS ((bfd *, const struct internal_ldhdr *, struct external_ldhdr *)); | |
439 | static void xcoff_swap_ldsym_in | |
440 | PARAMS ((bfd *, const struct external_ldsym *, struct internal_ldsym *)); | |
441 | static void xcoff_swap_ldsym_out | |
442 | PARAMS ((bfd *, const struct internal_ldsym *, struct external_ldsym *)); | |
443 | static void xcoff_swap_ldrel_in | |
444 | PARAMS ((bfd *, const struct external_ldrel *, struct internal_ldrel *)); | |
445 | static void xcoff_swap_ldrel_out | |
446 | PARAMS ((bfd *, const struct internal_ldrel *, struct external_ldrel *)); | |
447 | static struct bfd_hash_entry *xcoff_link_hash_newfunc | |
448 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
449 | static boolean xcoff_get_section_contents PARAMS ((bfd *, asection *)); | |
450 | static struct internal_reloc *xcoff_read_internal_relocs | |
451 | PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean, | |
452 | struct internal_reloc *)); | |
453 | static boolean xcoff_link_add_object_symbols | |
454 | PARAMS ((bfd *, struct bfd_link_info *)); | |
455 | static boolean xcoff_link_check_archive_element | |
456 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); | |
457 | static boolean xcoff_link_check_ar_symbols | |
458 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); | |
459 | static boolean xcoff_link_check_dynamic_ar_symbols | |
460 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); | |
461 | static bfd_size_type xcoff_find_reloc | |
462 | PARAMS ((struct internal_reloc *, bfd_size_type, bfd_vma)); | |
463 | static boolean xcoff_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *)); | |
464 | static boolean xcoff_link_add_dynamic_symbols | |
465 | PARAMS ((bfd *, struct bfd_link_info *)); | |
466 | static boolean xcoff_mark_symbol | |
467 | PARAMS ((struct bfd_link_info *, struct xcoff_link_hash_entry *)); | |
468 | static boolean xcoff_mark PARAMS ((struct bfd_link_info *, asection *)); | |
469 | static void xcoff_sweep PARAMS ((struct bfd_link_info *)); | |
470 | static boolean xcoff_build_ldsyms | |
471 | PARAMS ((struct xcoff_link_hash_entry *, PTR)); | |
472 | static boolean xcoff_link_input_bfd | |
473 | PARAMS ((struct xcoff_final_link_info *, bfd *)); | |
474 | static boolean xcoff_write_global_symbol | |
475 | PARAMS ((struct xcoff_link_hash_entry *, PTR)); | |
476 | static boolean xcoff_reloc_link_order | |
477 | PARAMS ((bfd *, struct xcoff_final_link_info *, asection *, | |
478 | struct bfd_link_order *)); | |
479 | static int xcoff_sort_relocs PARAMS ((const PTR, const PTR)); | |
480 | \f | |
481 | /* Routines to swap information in the XCOFF .loader section. If we | |
482 | ever need to write an XCOFF loader, this stuff will need to be | |
483 | moved to another file shared by the linker (which XCOFF calls the | |
484 | ``binder'') and the loader. */ | |
485 | ||
486 | /* Swap in the ldhdr structure. */ | |
487 | ||
488 | static void | |
489 | xcoff_swap_ldhdr_in (abfd, src, dst) | |
490 | bfd *abfd; | |
491 | const struct external_ldhdr *src; | |
492 | struct internal_ldhdr *dst; | |
493 | { | |
494 | dst->l_version = bfd_get_32 (abfd, src->l_version); | |
495 | dst->l_nsyms = bfd_get_32 (abfd, src->l_nsyms); | |
496 | dst->l_nreloc = bfd_get_32 (abfd, src->l_nreloc); | |
497 | dst->l_istlen = bfd_get_32 (abfd, src->l_istlen); | |
498 | dst->l_nimpid = bfd_get_32 (abfd, src->l_nimpid); | |
499 | dst->l_impoff = bfd_get_32 (abfd, src->l_impoff); | |
500 | dst->l_stlen = bfd_get_32 (abfd, src->l_stlen); | |
501 | dst->l_stoff = bfd_get_32 (abfd, src->l_stoff); | |
502 | } | |
503 | ||
504 | /* Swap out the ldhdr structure. */ | |
505 | ||
506 | static void | |
507 | xcoff_swap_ldhdr_out (abfd, src, dst) | |
508 | bfd *abfd; | |
509 | const struct internal_ldhdr *src; | |
510 | struct external_ldhdr *dst; | |
511 | { | |
512 | bfd_put_32 (abfd, src->l_version, dst->l_version); | |
513 | bfd_put_32 (abfd, src->l_nsyms, dst->l_nsyms); | |
514 | bfd_put_32 (abfd, src->l_nreloc, dst->l_nreloc); | |
515 | bfd_put_32 (abfd, src->l_istlen, dst->l_istlen); | |
516 | bfd_put_32 (abfd, src->l_nimpid, dst->l_nimpid); | |
517 | bfd_put_32 (abfd, src->l_impoff, dst->l_impoff); | |
518 | bfd_put_32 (abfd, src->l_stlen, dst->l_stlen); | |
519 | bfd_put_32 (abfd, src->l_stoff, dst->l_stoff); | |
520 | } | |
521 | ||
522 | /* Swap in the ldsym structure. */ | |
523 | ||
524 | static void | |
525 | xcoff_swap_ldsym_in (abfd, src, dst) | |
526 | bfd *abfd; | |
527 | const struct external_ldsym *src; | |
528 | struct internal_ldsym *dst; | |
529 | { | |
530 | if (bfd_get_32 (abfd, src->_l._l_l._l_zeroes) != 0) | |
531 | memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN); | |
532 | else | |
533 | { | |
534 | dst->_l._l_l._l_zeroes = 0; | |
535 | dst->_l._l_l._l_offset = bfd_get_32 (abfd, src->_l._l_l._l_offset); | |
536 | } | |
537 | dst->l_value = bfd_get_32 (abfd, src->l_value); | |
538 | dst->l_scnum = bfd_get_16 (abfd, src->l_scnum); | |
539 | dst->l_smtype = bfd_get_8 (abfd, src->l_smtype); | |
540 | dst->l_smclas = bfd_get_8 (abfd, src->l_smclas); | |
541 | dst->l_ifile = bfd_get_32 (abfd, src->l_ifile); | |
542 | dst->l_parm = bfd_get_32 (abfd, src->l_parm); | |
543 | } | |
544 | ||
545 | /* Swap out the ldsym structure. */ | |
546 | ||
547 | static void | |
548 | xcoff_swap_ldsym_out (abfd, src, dst) | |
549 | bfd *abfd; | |
550 | const struct internal_ldsym *src; | |
551 | struct external_ldsym *dst; | |
552 | { | |
553 | if (src->_l._l_l._l_zeroes != 0) | |
554 | memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN); | |
555 | else | |
556 | { | |
557 | bfd_put_32 (abfd, 0, dst->_l._l_l._l_zeroes); | |
558 | bfd_put_32 (abfd, src->_l._l_l._l_offset, dst->_l._l_l._l_offset); | |
559 | } | |
560 | bfd_put_32 (abfd, src->l_value, dst->l_value); | |
561 | bfd_put_16 (abfd, src->l_scnum, dst->l_scnum); | |
562 | bfd_put_8 (abfd, src->l_smtype, dst->l_smtype); | |
563 | bfd_put_8 (abfd, src->l_smclas, dst->l_smclas); | |
564 | bfd_put_32 (abfd, src->l_ifile, dst->l_ifile); | |
565 | bfd_put_32 (abfd, src->l_parm, dst->l_parm); | |
566 | } | |
567 | ||
568 | /* Swap in the ldrel structure. */ | |
569 | ||
570 | static void | |
571 | xcoff_swap_ldrel_in (abfd, src, dst) | |
572 | bfd *abfd; | |
573 | const struct external_ldrel *src; | |
574 | struct internal_ldrel *dst; | |
575 | { | |
576 | dst->l_vaddr = bfd_get_32 (abfd, src->l_vaddr); | |
577 | dst->l_symndx = bfd_get_32 (abfd, src->l_symndx); | |
578 | dst->l_rtype = bfd_get_16 (abfd, src->l_rtype); | |
579 | dst->l_rsecnm = bfd_get_16 (abfd, src->l_rsecnm); | |
580 | } | |
581 | ||
582 | /* Swap out the ldrel structure. */ | |
583 | ||
584 | static void | |
585 | xcoff_swap_ldrel_out (abfd, src, dst) | |
586 | bfd *abfd; | |
587 | const struct internal_ldrel *src; | |
588 | struct external_ldrel *dst; | |
589 | { | |
590 | bfd_put_32 (abfd, src->l_vaddr, dst->l_vaddr); | |
591 | bfd_put_32 (abfd, src->l_symndx, dst->l_symndx); | |
592 | bfd_put_16 (abfd, src->l_rtype, dst->l_rtype); | |
593 | bfd_put_16 (abfd, src->l_rsecnm, dst->l_rsecnm); | |
594 | } | |
595 | \f | |
596 | /* Routines to read XCOFF dynamic information. This don't really | |
597 | belong here, but we already have the ldsym manipulation routines | |
598 | here. */ | |
599 | ||
600 | /* Read the contents of a section. */ | |
601 | ||
602 | static boolean | |
603 | xcoff_get_section_contents (abfd, sec) | |
604 | bfd *abfd; | |
605 | asection *sec; | |
606 | { | |
607 | if (coff_section_data (abfd, sec) == NULL) | |
608 | { | |
609 | sec->used_by_bfd = bfd_zalloc (abfd, | |
610 | sizeof (struct coff_section_tdata)); | |
611 | if (sec->used_by_bfd == NULL) | |
612 | return false; | |
613 | } | |
614 | ||
615 | if (coff_section_data (abfd, sec)->contents == NULL) | |
616 | { | |
617 | coff_section_data (abfd, sec)->contents = | |
618 | (bfd_byte *) bfd_malloc (sec->_raw_size); | |
619 | if (coff_section_data (abfd, sec)->contents == NULL) | |
620 | return false; | |
621 | ||
622 | if (! bfd_get_section_contents (abfd, sec, | |
623 | coff_section_data (abfd, sec)->contents, | |
624 | (file_ptr) 0, sec->_raw_size)) | |
625 | return false; | |
626 | } | |
627 | ||
628 | return true; | |
629 | } | |
630 | ||
631 | /* Get the size required to hold the dynamic symbols. */ | |
632 | ||
633 | long | |
634 | _bfd_xcoff_get_dynamic_symtab_upper_bound (abfd) | |
635 | bfd *abfd; | |
636 | { | |
637 | asection *lsec; | |
638 | bfd_byte *contents; | |
639 | struct internal_ldhdr ldhdr; | |
640 | ||
641 | if ((abfd->flags & DYNAMIC) == 0) | |
642 | { | |
643 | bfd_set_error (bfd_error_invalid_operation); | |
644 | return -1; | |
645 | } | |
646 | ||
647 | lsec = bfd_get_section_by_name (abfd, ".loader"); | |
648 | if (lsec == NULL) | |
649 | { | |
650 | bfd_set_error (bfd_error_no_symbols); | |
651 | return -1; | |
652 | } | |
653 | ||
654 | if (! xcoff_get_section_contents (abfd, lsec)) | |
655 | return -1; | |
656 | contents = coff_section_data (abfd, lsec)->contents; | |
657 | ||
658 | xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr); | |
659 | ||
660 | return (ldhdr.l_nsyms + 1) * sizeof (asymbol *); | |
661 | } | |
662 | ||
663 | /* Get the dynamic symbols. */ | |
664 | ||
665 | long | |
666 | _bfd_xcoff_canonicalize_dynamic_symtab (abfd, psyms) | |
667 | bfd *abfd; | |
668 | asymbol **psyms; | |
669 | { | |
670 | asection *lsec; | |
671 | bfd_byte *contents; | |
672 | struct internal_ldhdr ldhdr; | |
673 | const char *strings; | |
674 | struct external_ldsym *elsym, *elsymend; | |
675 | coff_symbol_type *symbuf; | |
676 | ||
677 | if ((abfd->flags & DYNAMIC) == 0) | |
678 | { | |
679 | bfd_set_error (bfd_error_invalid_operation); | |
680 | return -1; | |
681 | } | |
682 | ||
683 | lsec = bfd_get_section_by_name (abfd, ".loader"); | |
684 | if (lsec == NULL) | |
685 | { | |
686 | bfd_set_error (bfd_error_no_symbols); | |
687 | return -1; | |
688 | } | |
689 | ||
690 | if (! xcoff_get_section_contents (abfd, lsec)) | |
691 | return -1; | |
692 | contents = coff_section_data (abfd, lsec)->contents; | |
693 | ||
694 | coff_section_data (abfd, lsec)->keep_contents = true; | |
695 | ||
696 | xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr); | |
697 | ||
698 | strings = (char *) contents + ldhdr.l_stoff; | |
699 | ||
700 | symbuf = ((coff_symbol_type *) | |
701 | bfd_zalloc (abfd, ldhdr.l_nsyms * sizeof (coff_symbol_type))); | |
702 | if (symbuf == NULL) | |
703 | return -1; | |
704 | ||
705 | elsym = (struct external_ldsym *) (contents + LDHDRSZ); | |
706 | elsymend = elsym + ldhdr.l_nsyms; | |
707 | for (; elsym < elsymend; elsym++, symbuf++, psyms++) | |
708 | { | |
709 | struct internal_ldsym ldsym; | |
710 | ||
711 | xcoff_swap_ldsym_in (abfd, elsym, &ldsym); | |
712 | ||
713 | symbuf->symbol.the_bfd = abfd; | |
714 | ||
715 | if (ldsym._l._l_l._l_zeroes == 0) | |
716 | symbuf->symbol.name = strings + ldsym._l._l_l._l_offset; | |
717 | else | |
718 | { | |
719 | int i; | |
720 | ||
721 | for (i = 0; i < SYMNMLEN; i++) | |
722 | if (ldsym._l._l_name[i] == '\0') | |
723 | break; | |
724 | if (i < SYMNMLEN) | |
725 | symbuf->symbol.name = (char *) elsym->_l._l_name; | |
726 | else | |
727 | { | |
728 | char *c; | |
729 | ||
730 | c = bfd_alloc (abfd, SYMNMLEN + 1); | |
731 | if (c == NULL) | |
732 | return -1; | |
733 | memcpy (c, ldsym._l._l_name, SYMNMLEN); | |
734 | c[SYMNMLEN] = '\0'; | |
735 | symbuf->symbol.name = c; | |
736 | } | |
737 | } | |
738 | ||
739 | if (ldsym.l_smclas == XMC_XO) | |
740 | symbuf->symbol.section = bfd_abs_section_ptr; | |
741 | else | |
742 | symbuf->symbol.section = coff_section_from_bfd_index (abfd, | |
743 | ldsym.l_scnum); | |
744 | symbuf->symbol.value = ldsym.l_value - symbuf->symbol.section->vma; | |
745 | ||
746 | symbuf->symbol.flags = BSF_NO_FLAGS; | |
747 | if ((ldsym.l_smtype & L_EXPORT) != 0) | |
748 | symbuf->symbol.flags |= BSF_GLOBAL; | |
749 | ||
750 | /* FIXME: We have no way to record the other information stored | |
751 | with the loader symbol. */ | |
752 | ||
753 | *psyms = (asymbol *) symbuf; | |
754 | } | |
755 | ||
756 | *psyms = NULL; | |
757 | ||
758 | return ldhdr.l_nsyms; | |
759 | } | |
760 | ||
761 | /* Get the size required to hold the dynamic relocs. */ | |
762 | ||
763 | long | |
764 | _bfd_xcoff_get_dynamic_reloc_upper_bound (abfd) | |
765 | bfd *abfd; | |
766 | { | |
767 | asection *lsec; | |
768 | bfd_byte *contents; | |
769 | struct internal_ldhdr ldhdr; | |
770 | ||
771 | if ((abfd->flags & DYNAMIC) == 0) | |
772 | { | |
773 | bfd_set_error (bfd_error_invalid_operation); | |
774 | return -1; | |
775 | } | |
776 | ||
777 | lsec = bfd_get_section_by_name (abfd, ".loader"); | |
778 | if (lsec == NULL) | |
779 | { | |
780 | bfd_set_error (bfd_error_no_symbols); | |
781 | return -1; | |
782 | } | |
783 | ||
784 | if (! xcoff_get_section_contents (abfd, lsec)) | |
785 | return -1; | |
786 | contents = coff_section_data (abfd, lsec)->contents; | |
787 | ||
788 | xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr); | |
789 | ||
790 | return (ldhdr.l_nreloc + 1) * sizeof (arelent *); | |
791 | } | |
792 | ||
793 | /* The typical dynamic reloc. */ | |
794 | ||
795 | static reloc_howto_type xcoff_dynamic_reloc = | |
796 | HOWTO (0, /* type */ | |
797 | 0, /* rightshift */ | |
798 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
799 | 32, /* bitsize */ | |
800 | false, /* pc_relative */ | |
801 | 0, /* bitpos */ | |
802 | complain_overflow_bitfield, /* complain_on_overflow */ | |
803 | 0, /* special_function */ | |
804 | "R_POS", /* name */ | |
805 | true, /* partial_inplace */ | |
806 | 0xffffffff, /* src_mask */ | |
807 | 0xffffffff, /* dst_mask */ | |
808 | false); /* pcrel_offset */ | |
809 | ||
810 | /* Get the dynamic relocs. */ | |
811 | ||
812 | long | |
813 | _bfd_xcoff_canonicalize_dynamic_reloc (abfd, prelocs, syms) | |
814 | bfd *abfd; | |
815 | arelent **prelocs; | |
816 | asymbol **syms; | |
817 | { | |
818 | asection *lsec; | |
819 | bfd_byte *contents; | |
820 | struct internal_ldhdr ldhdr; | |
821 | arelent *relbuf; | |
822 | struct external_ldrel *elrel, *elrelend; | |
823 | ||
824 | if ((abfd->flags & DYNAMIC) == 0) | |
825 | { | |
826 | bfd_set_error (bfd_error_invalid_operation); | |
827 | return -1; | |
828 | } | |
829 | ||
830 | lsec = bfd_get_section_by_name (abfd, ".loader"); | |
831 | if (lsec == NULL) | |
832 | { | |
833 | bfd_set_error (bfd_error_no_symbols); | |
834 | return -1; | |
835 | } | |
836 | ||
837 | if (! xcoff_get_section_contents (abfd, lsec)) | |
838 | return -1; | |
839 | contents = coff_section_data (abfd, lsec)->contents; | |
840 | ||
841 | xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr); | |
842 | ||
843 | relbuf = (arelent *) bfd_alloc (abfd, ldhdr.l_nreloc * sizeof (arelent)); | |
844 | if (relbuf == NULL) | |
845 | return -1; | |
846 | ||
847 | elrel = ((struct external_ldrel *) | |
848 | (contents + LDHDRSZ + ldhdr.l_nsyms * LDSYMSZ)); | |
849 | elrelend = elrel + ldhdr.l_nreloc; | |
850 | for (; elrel < elrelend; elrel++, relbuf++, prelocs++) | |
851 | { | |
852 | struct internal_ldrel ldrel; | |
853 | ||
854 | xcoff_swap_ldrel_in (abfd, elrel, &ldrel); | |
855 | ||
856 | if (ldrel.l_symndx >= 3) | |
857 | relbuf->sym_ptr_ptr = syms + (ldrel.l_symndx - 3); | |
858 | else | |
859 | { | |
860 | const char *name; | |
861 | asection *sec; | |
862 | ||
863 | switch (ldrel.l_symndx) | |
864 | { | |
865 | case 0: | |
866 | name = ".text"; | |
867 | break; | |
868 | case 1: | |
869 | name = ".data"; | |
870 | break; | |
871 | case 2: | |
872 | name = ".bss"; | |
873 | break; | |
874 | default: | |
875 | abort (); | |
876 | break; | |
877 | } | |
878 | ||
879 | sec = bfd_get_section_by_name (abfd, name); | |
880 | if (sec == NULL) | |
881 | { | |
882 | bfd_set_error (bfd_error_bad_value); | |
883 | return -1; | |
884 | } | |
885 | ||
886 | relbuf->sym_ptr_ptr = sec->symbol_ptr_ptr; | |
887 | } | |
888 | ||
889 | relbuf->address = ldrel.l_vaddr; | |
890 | relbuf->addend = 0; | |
891 | ||
892 | /* Most dynamic relocs have the same type. FIXME: This is only | |
893 | correct if ldrel.l_rtype == 0. In other cases, we should use | |
894 | a different howto. */ | |
895 | relbuf->howto = &xcoff_dynamic_reloc; | |
896 | ||
897 | /* FIXME: We have no way to record the l_rsecnm field. */ | |
898 | ||
899 | *prelocs = relbuf; | |
900 | } | |
901 | ||
902 | *prelocs = NULL; | |
903 | ||
904 | return ldhdr.l_nreloc; | |
905 | } | |
906 | \f | |
907 | /* Routine to create an entry in an XCOFF link hash table. */ | |
908 | ||
909 | static struct bfd_hash_entry * | |
910 | xcoff_link_hash_newfunc (entry, table, string) | |
911 | struct bfd_hash_entry *entry; | |
912 | struct bfd_hash_table *table; | |
913 | const char *string; | |
914 | { | |
915 | struct xcoff_link_hash_entry *ret = (struct xcoff_link_hash_entry *) entry; | |
916 | ||
917 | /* Allocate the structure if it has not already been allocated by a | |
918 | subclass. */ | |
919 | if (ret == (struct xcoff_link_hash_entry *) NULL) | |
920 | ret = ((struct xcoff_link_hash_entry *) | |
921 | bfd_hash_allocate (table, sizeof (struct xcoff_link_hash_entry))); | |
922 | if (ret == (struct xcoff_link_hash_entry *) NULL) | |
923 | return (struct bfd_hash_entry *) ret; | |
924 | ||
925 | /* Call the allocation method of the superclass. */ | |
926 | ret = ((struct xcoff_link_hash_entry *) | |
927 | _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
928 | table, string)); | |
929 | if (ret != NULL) | |
930 | { | |
931 | /* Set local fields. */ | |
932 | ret->indx = -1; | |
933 | ret->toc_section = NULL; | |
934 | ret->u.toc_indx = -1; | |
935 | ret->descriptor = NULL; | |
936 | ret->ldsym = NULL; | |
937 | ret->ldindx = -1; | |
938 | ret->flags = 0; | |
939 | ret->smclas = XMC_UA; | |
940 | } | |
941 | ||
942 | return (struct bfd_hash_entry *) ret; | |
943 | } | |
944 | ||
945 | /* Create a XCOFF link hash table. */ | |
946 | ||
947 | struct bfd_link_hash_table * | |
948 | _bfd_xcoff_bfd_link_hash_table_create (abfd) | |
949 | bfd *abfd; | |
950 | { | |
951 | struct xcoff_link_hash_table *ret; | |
952 | ||
953 | ret = ((struct xcoff_link_hash_table *) | |
954 | bfd_alloc (abfd, sizeof (struct xcoff_link_hash_table))); | |
955 | if (ret == (struct xcoff_link_hash_table *) NULL) | |
956 | return (struct bfd_link_hash_table *) NULL; | |
957 | if (! _bfd_link_hash_table_init (&ret->root, abfd, xcoff_link_hash_newfunc)) | |
958 | { | |
959 | bfd_release (abfd, ret); | |
960 | return (struct bfd_link_hash_table *) NULL; | |
961 | } | |
962 | ||
963 | ret->debug_strtab = _bfd_xcoff_stringtab_init (); | |
964 | ret->debug_section = NULL; | |
965 | ret->loader_section = NULL; | |
966 | ret->ldrel_count = 0; | |
967 | memset (&ret->ldhdr, 0, sizeof (struct internal_ldhdr)); | |
968 | ret->linkage_section = NULL; | |
969 | ret->toc_section = NULL; | |
970 | ret->descriptor_section = NULL; | |
971 | ret->imports = NULL; | |
972 | ret->file_align = 0; | |
973 | ret->textro = false; | |
974 | ret->gc = false; | |
975 | memset (ret->special_sections, 0, sizeof ret->special_sections); | |
976 | ||
977 | /* The linker will always generate a full a.out header. We need to | |
978 | record that fact now, before the sizeof_headers routine could be | |
979 | called. */ | |
980 | xcoff_data (abfd)->full_aouthdr = true; | |
981 | ||
982 | return &ret->root; | |
983 | } | |
984 | ||
985 | /* Look up an entry in an XCOFF link hash table. */ | |
986 | ||
987 | #define xcoff_link_hash_lookup(table, string, create, copy, follow) \ | |
988 | ((struct xcoff_link_hash_entry *) \ | |
989 | bfd_link_hash_lookup (&(table)->root, (string), (create), (copy),\ | |
990 | (follow))) | |
991 | ||
992 | /* Traverse an XCOFF link hash table. */ | |
993 | ||
994 | #define xcoff_link_hash_traverse(table, func, info) \ | |
995 | (bfd_link_hash_traverse \ | |
996 | (&(table)->root, \ | |
997 | (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \ | |
998 | (info))) | |
999 | ||
1000 | /* Get the XCOFF link hash table from the info structure. This is | |
1001 | just a cast. */ | |
1002 | ||
1003 | #define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash)) | |
1004 | \f | |
1005 | /* Read internal relocs for an XCOFF csect. This is a wrapper around | |
1006 | _bfd_coff_read_internal_relocs which tries to take advantage of any | |
1007 | relocs which may have been cached for the enclosing section. */ | |
1008 | ||
1009 | static struct internal_reloc * | |
1010 | xcoff_read_internal_relocs (abfd, sec, cache, external_relocs, | |
1011 | require_internal, internal_relocs) | |
1012 | bfd *abfd; | |
1013 | asection *sec; | |
1014 | boolean cache; | |
1015 | bfd_byte *external_relocs; | |
1016 | boolean require_internal; | |
1017 | struct internal_reloc *internal_relocs; | |
1018 | { | |
1019 | if (coff_section_data (abfd, sec) != NULL | |
1020 | && coff_section_data (abfd, sec)->relocs == NULL | |
1021 | && xcoff_section_data (abfd, sec) != NULL) | |
1022 | { | |
1023 | asection *enclosing; | |
1024 | ||
1025 | enclosing = xcoff_section_data (abfd, sec)->enclosing; | |
1026 | ||
1027 | if (enclosing != NULL | |
1028 | && (coff_section_data (abfd, enclosing) == NULL | |
1029 | || coff_section_data (abfd, enclosing)->relocs == NULL) | |
1030 | && cache | |
1031 | && enclosing->reloc_count > 0) | |
1032 | { | |
1033 | if (_bfd_coff_read_internal_relocs (abfd, enclosing, true, | |
1034 | external_relocs, false, | |
1035 | (struct internal_reloc *) NULL) | |
1036 | == NULL) | |
1037 | return NULL; | |
1038 | } | |
1039 | ||
1040 | if (enclosing != NULL | |
1041 | && coff_section_data (abfd, enclosing) != NULL | |
1042 | && coff_section_data (abfd, enclosing)->relocs != NULL) | |
1043 | { | |
1044 | size_t off; | |
1045 | ||
1046 | off = ((sec->rel_filepos - enclosing->rel_filepos) | |
1047 | / bfd_coff_relsz (abfd)); | |
1048 | if (! require_internal) | |
1049 | return coff_section_data (abfd, enclosing)->relocs + off; | |
1050 | memcpy (internal_relocs, | |
1051 | coff_section_data (abfd, enclosing)->relocs + off, | |
1052 | sec->reloc_count * sizeof (struct internal_reloc)); | |
1053 | return internal_relocs; | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | return _bfd_coff_read_internal_relocs (abfd, sec, cache, external_relocs, | |
1058 | require_internal, internal_relocs); | |
1059 | } | |
1060 | \f | |
1061 | /* Given an XCOFF BFD, add symbols to the global hash table as | |
1062 | appropriate. */ | |
1063 | ||
1064 | boolean | |
1065 | _bfd_xcoff_bfd_link_add_symbols (abfd, info) | |
1066 | bfd *abfd; | |
1067 | struct bfd_link_info *info; | |
1068 | { | |
1069 | switch (bfd_get_format (abfd)) | |
1070 | { | |
1071 | case bfd_object: | |
1072 | return xcoff_link_add_object_symbols (abfd, info); | |
1073 | ||
1074 | case bfd_archive: | |
1075 | /* If the archive has a map, do the usual search. We then need | |
1076 | to check the archive for stripped dynamic objects, because | |
1077 | they will not appear in the archive map even though they | |
1078 | should, perhaps, be included. If the archive has no map, we | |
1079 | just consider each object file in turn, since that apparently | |
1080 | is what the AIX native linker does. */ | |
1081 | if (bfd_has_map (abfd)) | |
1082 | { | |
1083 | if (! (_bfd_generic_link_add_archive_symbols | |
1084 | (abfd, info, xcoff_link_check_archive_element))) | |
1085 | return false; | |
1086 | } | |
1087 | ||
1088 | { | |
1089 | bfd *member; | |
1090 | ||
1091 | member = bfd_openr_next_archived_file (abfd, (bfd *) NULL); | |
1092 | while (member != NULL) | |
1093 | { | |
1094 | if (bfd_check_format (member, bfd_object) | |
1095 | && (! bfd_has_map (abfd) | |
1096 | || ((member->flags & DYNAMIC) != 0 | |
1097 | && (member->flags & HAS_SYMS) == 0))) | |
1098 | { | |
1099 | boolean needed; | |
1100 | ||
1101 | if (! xcoff_link_check_archive_element (member, info, &needed)) | |
1102 | return false; | |
1103 | if (needed) | |
1104 | member->archive_pass = -1; | |
1105 | } | |
1106 | member = bfd_openr_next_archived_file (abfd, member); | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | return true; | |
1111 | ||
1112 | default: | |
1113 | bfd_set_error (bfd_error_wrong_format); | |
1114 | return false; | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | /* Add symbols from an XCOFF object file. */ | |
1119 | ||
1120 | static boolean | |
1121 | xcoff_link_add_object_symbols (abfd, info) | |
1122 | bfd *abfd; | |
1123 | struct bfd_link_info *info; | |
1124 | { | |
1125 | if (! _bfd_coff_get_external_symbols (abfd)) | |
1126 | return false; | |
1127 | if (! xcoff_link_add_symbols (abfd, info)) | |
1128 | return false; | |
1129 | if (! info->keep_memory) | |
1130 | { | |
1131 | if (! _bfd_coff_free_symbols (abfd)) | |
1132 | return false; | |
1133 | } | |
1134 | return true; | |
1135 | } | |
1136 | ||
1137 | /* Check a single archive element to see if we need to include it in | |
1138 | the link. *PNEEDED is set according to whether this element is | |
1139 | needed in the link or not. This is called via | |
1140 | _bfd_generic_link_add_archive_symbols. */ | |
1141 | ||
1142 | static boolean | |
1143 | xcoff_link_check_archive_element (abfd, info, pneeded) | |
1144 | bfd *abfd; | |
1145 | struct bfd_link_info *info; | |
1146 | boolean *pneeded; | |
1147 | { | |
1148 | if (! _bfd_coff_get_external_symbols (abfd)) | |
1149 | return false; | |
1150 | ||
1151 | if (! xcoff_link_check_ar_symbols (abfd, info, pneeded)) | |
1152 | return false; | |
1153 | ||
1154 | if (*pneeded) | |
1155 | { | |
1156 | if (! xcoff_link_add_symbols (abfd, info)) | |
1157 | return false; | |
1158 | } | |
1159 | ||
1160 | if (! info->keep_memory || ! *pneeded) | |
1161 | { | |
1162 | if (! _bfd_coff_free_symbols (abfd)) | |
1163 | return false; | |
1164 | } | |
1165 | ||
1166 | return true; | |
1167 | } | |
1168 | ||
1169 | /* Look through the symbols to see if this object file should be | |
1170 | included in the link. */ | |
1171 | ||
1172 | static boolean | |
1173 | xcoff_link_check_ar_symbols (abfd, info, pneeded) | |
1174 | bfd *abfd; | |
1175 | struct bfd_link_info *info; | |
1176 | boolean *pneeded; | |
1177 | { | |
1178 | bfd_size_type symesz; | |
1179 | bfd_byte *esym; | |
1180 | bfd_byte *esym_end; | |
1181 | ||
1182 | *pneeded = false; | |
1183 | ||
1184 | if ((abfd->flags & DYNAMIC) != 0 | |
1185 | && ! info->static_link | |
1186 | && info->hash->creator == abfd->xvec) | |
1187 | return xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded); | |
1188 | ||
1189 | symesz = bfd_coff_symesz (abfd); | |
1190 | esym = (bfd_byte *) obj_coff_external_syms (abfd); | |
1191 | esym_end = esym + obj_raw_syment_count (abfd) * symesz; | |
1192 | while (esym < esym_end) | |
1193 | { | |
1194 | struct internal_syment sym; | |
1195 | ||
1196 | bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); | |
1197 | ||
1198 | if (sym.n_sclass == C_EXT && sym.n_scnum != N_UNDEF) | |
1199 | { | |
1200 | const char *name; | |
1201 | char buf[SYMNMLEN + 1]; | |
1202 | struct bfd_link_hash_entry *h; | |
1203 | ||
1204 | /* This symbol is externally visible, and is defined by this | |
1205 | object file. */ | |
1206 | ||
1207 | name = _bfd_coff_internal_syment_name (abfd, &sym, buf); | |
1208 | if (name == NULL) | |
1209 | return false; | |
1210 | h = bfd_link_hash_lookup (info->hash, name, false, false, true); | |
1211 | ||
1212 | /* We are only interested in symbols that are currently | |
1213 | undefined. If a symbol is currently known to be common, | |
1214 | XCOFF linkers do not bring in an object file which | |
1215 | defines it. We also don't bring in symbols to satisfy | |
1216 | undefined references in shared objects. */ | |
1217 | if (h != (struct bfd_link_hash_entry *) NULL | |
1218 | && h->type == bfd_link_hash_undefined | |
1219 | && (info->hash->creator != abfd->xvec | |
1220 | || (((struct xcoff_link_hash_entry *) h)->flags | |
1221 | & XCOFF_DEF_DYNAMIC) == 0)) | |
1222 | { | |
1223 | if (! (*info->callbacks->add_archive_element) (info, abfd, name)) | |
1224 | return false; | |
1225 | *pneeded = true; | |
1226 | return true; | |
1227 | } | |
1228 | } | |
1229 | ||
1230 | esym += (sym.n_numaux + 1) * symesz; | |
1231 | } | |
1232 | ||
1233 | /* We do not need this object file. */ | |
1234 | return true; | |
1235 | } | |
1236 | ||
1237 | /* Look through the loader symbols to see if this dynamic object | |
1238 | should be included in the link. The native linker uses the loader | |
1239 | symbols, not the normal symbol table, so we do too. */ | |
1240 | ||
1241 | static boolean | |
1242 | xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded) | |
1243 | bfd *abfd; | |
1244 | struct bfd_link_info *info; | |
1245 | boolean *pneeded; | |
1246 | { | |
1247 | asection *lsec; | |
1248 | bfd_byte *buf; | |
1249 | struct internal_ldhdr ldhdr; | |
1250 | const char *strings; | |
1251 | struct external_ldsym *elsym, *elsymend; | |
1252 | ||
1253 | *pneeded = false; | |
1254 | ||
1255 | lsec = bfd_get_section_by_name (abfd, ".loader"); | |
1256 | if (lsec == NULL) | |
1257 | { | |
1258 | /* There are no symbols, so don't try to include it. */ | |
1259 | return true; | |
1260 | } | |
1261 | ||
1262 | if (! xcoff_get_section_contents (abfd, lsec)) | |
1263 | return false; | |
1264 | buf = coff_section_data (abfd, lsec)->contents; | |
1265 | ||
1266 | xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr); | |
1267 | ||
1268 | strings = (char *) buf + ldhdr.l_stoff; | |
1269 | ||
1270 | elsym = (struct external_ldsym *) (buf + LDHDRSZ); | |
1271 | elsymend = elsym + ldhdr.l_nsyms; | |
1272 | for (; elsym < elsymend; elsym++) | |
1273 | { | |
1274 | struct internal_ldsym ldsym; | |
1275 | char nambuf[SYMNMLEN + 1]; | |
1276 | const char *name; | |
1277 | struct bfd_link_hash_entry *h; | |
1278 | ||
1279 | xcoff_swap_ldsym_in (abfd, elsym, &ldsym); | |
1280 | ||
1281 | /* We are only interested in exported symbols. */ | |
1282 | if ((ldsym.l_smtype & L_EXPORT) == 0) | |
1283 | continue; | |
1284 | ||
1285 | if (ldsym._l._l_l._l_zeroes == 0) | |
1286 | name = strings + ldsym._l._l_l._l_offset; | |
1287 | else | |
1288 | { | |
1289 | memcpy (nambuf, ldsym._l._l_name, SYMNMLEN); | |
1290 | nambuf[SYMNMLEN] = '\0'; | |
1291 | name = nambuf; | |
1292 | } | |
1293 | ||
1294 | h = bfd_link_hash_lookup (info->hash, name, false, false, true); | |
1295 | ||
1296 | /* We are only interested in symbols that are currently | |
1297 | undefined. At this point we know that we are using an XCOFF | |
1298 | hash table. */ | |
1299 | if (h != NULL | |
1300 | && h->type == bfd_link_hash_undefined | |
1301 | && (((struct xcoff_link_hash_entry *) h)->flags | |
1302 | & XCOFF_DEF_DYNAMIC) == 0) | |
1303 | { | |
1304 | if (! (*info->callbacks->add_archive_element) (info, abfd, name)) | |
1305 | return false; | |
1306 | *pneeded = true; | |
1307 | return true; | |
1308 | } | |
1309 | } | |
1310 | ||
1311 | /* We do not need this shared object. */ | |
1312 | ||
1313 | if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents) | |
1314 | { | |
1315 | free (coff_section_data (abfd, lsec)->contents); | |
1316 | coff_section_data (abfd, lsec)->contents = NULL; | |
1317 | } | |
1318 | ||
1319 | return true; | |
1320 | } | |
1321 | ||
1322 | /* Returns the index of reloc in RELOCS with the least address greater | |
1323 | than or equal to ADDRESS. The relocs are sorted by address. */ | |
1324 | ||
1325 | static bfd_size_type | |
1326 | xcoff_find_reloc (relocs, count, address) | |
1327 | struct internal_reloc *relocs; | |
1328 | bfd_size_type count; | |
1329 | bfd_vma address; | |
1330 | { | |
1331 | bfd_size_type min, max, this; | |
1332 | ||
1333 | if (count < 2) | |
1334 | { | |
1335 | if (count == 1 && relocs[0].r_vaddr < address) | |
1336 | return 1; | |
1337 | else | |
1338 | return 0; | |
1339 | } | |
1340 | ||
1341 | min = 0; | |
1342 | max = count; | |
1343 | ||
1344 | /* Do a binary search over (min,max]. */ | |
1345 | while (min + 1 < max) | |
1346 | { | |
1347 | bfd_vma raddr; | |
1348 | ||
1349 | this = (max + min) / 2; | |
1350 | raddr = relocs[this].r_vaddr; | |
1351 | if (raddr > address) | |
1352 | max = this; | |
1353 | else if (raddr < address) | |
1354 | min = this; | |
1355 | else | |
1356 | { | |
1357 | min = this; | |
1358 | break; | |
1359 | } | |
1360 | } | |
1361 | ||
1362 | if (relocs[min].r_vaddr < address) | |
1363 | return min + 1; | |
1364 | ||
1365 | while (min > 0 | |
1366 | && relocs[min - 1].r_vaddr == address) | |
1367 | --min; | |
1368 | ||
1369 | return min; | |
1370 | } | |
1371 | ||
1372 | /* Add all the symbols from an object file to the hash table. | |
1373 | ||
1374 | XCOFF is a weird format. A normal XCOFF .o files will have three | |
1375 | COFF sections--.text, .data, and .bss--but each COFF section will | |
1376 | contain many csects. These csects are described in the symbol | |
1377 | table. From the linker's point of view, each csect must be | |
1378 | considered a section in its own right. For example, a TOC entry is | |
1379 | handled as a small XMC_TC csect. The linker must be able to merge | |
1380 | different TOC entries together, which means that it must be able to | |
1381 | extract the XMC_TC csects from the .data section of the input .o | |
1382 | file. | |
1383 | ||
1384 | From the point of view of our linker, this is, of course, a hideous | |
1385 | nightmare. We cope by actually creating sections for each csect, | |
1386 | and discarding the original sections. We then have to handle the | |
1387 | relocation entries carefully, since the only way to tell which | |
1388 | csect they belong to is to examine the address. */ | |
1389 | ||
1390 | static boolean | |
1391 | xcoff_link_add_symbols (abfd, info) | |
1392 | bfd *abfd; | |
1393 | struct bfd_link_info *info; | |
1394 | { | |
1395 | unsigned int n_tmask; | |
1396 | unsigned int n_btshft; | |
1397 | boolean default_copy; | |
1398 | bfd_size_type symcount; | |
1399 | struct xcoff_link_hash_entry **sym_hash; | |
1400 | asection **csect_cache; | |
1401 | bfd_size_type linesz; | |
1402 | asection *o; | |
1403 | asection *last_real; | |
1404 | boolean keep_syms; | |
1405 | asection *csect; | |
1406 | unsigned int csect_index; | |
1407 | asection *first_csect; | |
1408 | bfd_size_type symesz; | |
1409 | bfd_byte *esym; | |
1410 | bfd_byte *esym_end; | |
1411 | struct reloc_info_struct | |
1412 | { | |
1413 | struct internal_reloc *relocs; | |
1414 | asection **csects; | |
1415 | bfd_byte *linenos; | |
1416 | } *reloc_info = NULL; | |
1417 | ||
1418 | keep_syms = obj_coff_keep_syms (abfd); | |
1419 | ||
1420 | if ((abfd->flags & DYNAMIC) != 0 | |
1421 | && ! info->static_link) | |
1422 | { | |
1423 | if (! xcoff_link_add_dynamic_symbols (abfd, info)) | |
1424 | return false; | |
1425 | } | |
1426 | ||
1427 | if (info->hash->creator == abfd->xvec) | |
1428 | { | |
1429 | /* We need to build a .loader section, so we do it here. This | |
1430 | won't work if we're producing an XCOFF output file with no | |
1431 | XCOFF input files. FIXME. */ | |
1432 | if (xcoff_hash_table (info)->loader_section == NULL) | |
1433 | { | |
1434 | asection *lsec; | |
1435 | ||
1436 | lsec = bfd_make_section_anyway (abfd, ".loader"); | |
1437 | if (lsec == NULL) | |
1438 | goto error_return; | |
1439 | xcoff_hash_table (info)->loader_section = lsec; | |
1440 | lsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
1441 | } | |
1442 | /* Likewise for the linkage section. */ | |
1443 | if (xcoff_hash_table (info)->linkage_section == NULL) | |
1444 | { | |
1445 | asection *lsec; | |
1446 | ||
1447 | lsec = bfd_make_section_anyway (abfd, ".gl"); | |
1448 | if (lsec == NULL) | |
1449 | goto error_return; | |
1450 | xcoff_hash_table (info)->linkage_section = lsec; | |
1451 | lsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
1452 | | SEC_IN_MEMORY); | |
1453 | lsec->alignment_power = 2; | |
1454 | } | |
1455 | /* Likewise for the TOC section. */ | |
1456 | if (xcoff_hash_table (info)->toc_section == NULL) | |
1457 | { | |
1458 | asection *tsec; | |
1459 | ||
1460 | tsec = bfd_make_section_anyway (abfd, ".tc"); | |
1461 | if (tsec == NULL) | |
1462 | goto error_return; | |
1463 | xcoff_hash_table (info)->toc_section = tsec; | |
1464 | tsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
1465 | | SEC_IN_MEMORY); | |
1466 | tsec->alignment_power = 2; | |
1467 | } | |
1468 | /* Likewise for the descriptor section. */ | |
1469 | if (xcoff_hash_table (info)->descriptor_section == NULL) | |
1470 | { | |
1471 | asection *dsec; | |
1472 | ||
1473 | dsec = bfd_make_section_anyway (abfd, ".ds"); | |
1474 | if (dsec == NULL) | |
1475 | goto error_return; | |
1476 | xcoff_hash_table (info)->descriptor_section = dsec; | |
1477 | dsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
1478 | | SEC_IN_MEMORY); | |
1479 | dsec->alignment_power = 2; | |
1480 | } | |
1481 | /* Likewise for the .debug section. */ | |
1482 | if (xcoff_hash_table (info)->debug_section == NULL | |
1483 | && info->strip != strip_all) | |
1484 | { | |
1485 | asection *dsec; | |
1486 | ||
1487 | dsec = bfd_make_section_anyway (abfd, ".debug"); | |
1488 | if (dsec == NULL) | |
1489 | goto error_return; | |
1490 | xcoff_hash_table (info)->debug_section = dsec; | |
1491 | dsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
1492 | } | |
1493 | } | |
1494 | ||
1495 | if ((abfd->flags & DYNAMIC) != 0 | |
1496 | && ! info->static_link) | |
1497 | return true; | |
1498 | ||
1499 | n_tmask = coff_data (abfd)->local_n_tmask; | |
1500 | n_btshft = coff_data (abfd)->local_n_btshft; | |
1501 | ||
1502 | /* Define macros so that ISFCN, et. al., macros work correctly. */ | |
1503 | #define N_TMASK n_tmask | |
1504 | #define N_BTSHFT n_btshft | |
1505 | ||
1506 | if (info->keep_memory) | |
1507 | default_copy = false; | |
1508 | else | |
1509 | default_copy = true; | |
1510 | ||
1511 | symcount = obj_raw_syment_count (abfd); | |
1512 | ||
1513 | /* We keep a list of the linker hash table entries that correspond | |
1514 | to each external symbol. */ | |
1515 | sym_hash = ((struct xcoff_link_hash_entry **) | |
1516 | bfd_alloc (abfd, | |
1517 | (symcount | |
1518 | * sizeof (struct xcoff_link_hash_entry *)))); | |
1519 | if (sym_hash == NULL && symcount != 0) | |
1520 | goto error_return; | |
1521 | coff_data (abfd)->sym_hashes = (struct coff_link_hash_entry **) sym_hash; | |
1522 | memset (sym_hash, 0, | |
1523 | (size_t) symcount * sizeof (struct xcoff_link_hash_entry *)); | |
1524 | ||
1525 | /* Because of the weird stuff we are doing with XCOFF csects, we can | |
1526 | not easily determine which section a symbol is in, so we store | |
1527 | the information in the tdata for the input file. */ | |
1528 | csect_cache = ((asection **) | |
1529 | bfd_alloc (abfd, symcount * sizeof (asection *))); | |
1530 | if (csect_cache == NULL && symcount != 0) | |
1531 | goto error_return; | |
1532 | xcoff_data (abfd)->csects = csect_cache; | |
1533 | memset (csect_cache, 0, (size_t) symcount * sizeof (asection *)); | |
1534 | ||
1535 | /* While splitting sections into csects, we need to assign the | |
1536 | relocs correctly. The relocs and the csects must both be in | |
1537 | order by VMA within a given section, so we handle this by | |
1538 | scanning along the relocs as we process the csects. We index | |
1539 | into reloc_info using the section target_index. */ | |
1540 | reloc_info = ((struct reloc_info_struct *) | |
1541 | bfd_malloc ((abfd->section_count + 1) | |
1542 | * sizeof (struct reloc_info_struct))); | |
1543 | if (reloc_info == NULL) | |
1544 | goto error_return; | |
1545 | memset ((PTR) reloc_info, 0, | |
1546 | (abfd->section_count + 1) * sizeof (struct reloc_info_struct)); | |
1547 | ||
1548 | /* Read in the relocs and line numbers for each section. */ | |
1549 | linesz = bfd_coff_linesz (abfd); | |
1550 | last_real = NULL; | |
1551 | for (o = abfd->sections; o != NULL; o = o->next) | |
1552 | { | |
1553 | last_real = o; | |
1554 | if ((o->flags & SEC_RELOC) != 0) | |
1555 | { | |
1556 | reloc_info[o->target_index].relocs = | |
1557 | xcoff_read_internal_relocs (abfd, o, true, (bfd_byte *) NULL, | |
1558 | false, (struct internal_reloc *) NULL); | |
1559 | reloc_info[o->target_index].csects = | |
1560 | (asection **) bfd_malloc (o->reloc_count * sizeof (asection *)); | |
1561 | if (reloc_info[o->target_index].csects == NULL) | |
1562 | goto error_return; | |
1563 | memset (reloc_info[o->target_index].csects, 0, | |
1564 | o->reloc_count * sizeof (asection *)); | |
1565 | } | |
1566 | ||
1567 | if ((info->strip == strip_none || info->strip == strip_some) | |
1568 | && o->lineno_count > 0) | |
1569 | { | |
1570 | bfd_byte *linenos; | |
1571 | ||
1572 | linenos = (bfd_byte *) bfd_malloc (o->lineno_count * linesz); | |
1573 | if (linenos == NULL) | |
1574 | goto error_return; | |
1575 | reloc_info[o->target_index].linenos = linenos; | |
1576 | if (bfd_seek (abfd, o->line_filepos, SEEK_SET) != 0 | |
1577 | || (bfd_read (linenos, linesz, o->lineno_count, abfd) | |
1578 | != linesz * o->lineno_count)) | |
1579 | goto error_return; | |
1580 | } | |
1581 | } | |
1582 | ||
1583 | /* Don't let the linker relocation routines discard the symbols. */ | |
1584 | obj_coff_keep_syms (abfd) = true; | |
1585 | ||
1586 | csect = NULL; | |
1587 | csect_index = 0; | |
1588 | first_csect = NULL; | |
1589 | ||
1590 | symesz = bfd_coff_symesz (abfd); | |
1591 | BFD_ASSERT (symesz == bfd_coff_auxesz (abfd)); | |
1592 | esym = (bfd_byte *) obj_coff_external_syms (abfd); | |
1593 | esym_end = esym + symcount * symesz; | |
1594 | while (esym < esym_end) | |
1595 | { | |
1596 | struct internal_syment sym; | |
1597 | union internal_auxent aux; | |
1598 | const char *name; | |
1599 | char buf[SYMNMLEN + 1]; | |
1600 | int smtyp; | |
1601 | flagword flags; | |
1602 | asection *section; | |
1603 | bfd_vma value; | |
1604 | struct xcoff_link_hash_entry *set_toc; | |
1605 | ||
1606 | bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); | |
1607 | ||
1608 | /* In this pass we are only interested in symbols with csect | |
1609 | information. */ | |
1610 | if (sym.n_sclass != C_EXT && sym.n_sclass != C_HIDEXT) | |
1611 | { | |
1612 | if (sym.n_sclass == C_FILE && csect != NULL) | |
1613 | { | |
1614 | xcoff_section_data (abfd, csect)->last_symndx = | |
1615 | ((esym | |
1616 | - (bfd_byte *) obj_coff_external_syms (abfd)) | |
1617 | / symesz); | |
1618 | csect = NULL; | |
1619 | } | |
1620 | ||
1621 | if (csect != NULL) | |
1622 | *csect_cache = csect; | |
1623 | else if (first_csect == NULL || sym.n_sclass == C_FILE) | |
1624 | *csect_cache = coff_section_from_bfd_index (abfd, sym.n_scnum); | |
1625 | else | |
1626 | *csect_cache = NULL; | |
1627 | esym += (sym.n_numaux + 1) * symesz; | |
1628 | sym_hash += sym.n_numaux + 1; | |
1629 | csect_cache += sym.n_numaux + 1; | |
1630 | continue; | |
1631 | } | |
1632 | ||
1633 | name = _bfd_coff_internal_syment_name (abfd, &sym, buf); | |
1634 | if (name == NULL) | |
1635 | goto error_return; | |
1636 | ||
1637 | /* If this symbol has line number information attached to it, | |
1638 | and we're not stripping it, count the number of entries and | |
1639 | add them to the count for this csect. In the final link pass | |
1640 | we are going to attach line number information by symbol, | |
1641 | rather than by section, in order to more easily handle | |
1642 | garbage collection. */ | |
1643 | if ((info->strip == strip_none || info->strip == strip_some) | |
1644 | && sym.n_numaux > 1 | |
1645 | && csect != NULL | |
1646 | && ISFCN (sym.n_type)) | |
1647 | { | |
1648 | union internal_auxent auxlin; | |
1649 | ||
1650 | bfd_coff_swap_aux_in (abfd, (PTR) (esym + symesz), | |
1651 | sym.n_type, sym.n_sclass, | |
1652 | 0, sym.n_numaux, (PTR) &auxlin); | |
1653 | if (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0) | |
1654 | { | |
1655 | asection *enclosing; | |
1656 | bfd_size_type linoff; | |
1657 | ||
1658 | enclosing = xcoff_section_data (abfd, csect)->enclosing; | |
1659 | if (enclosing == NULL) | |
1660 | { | |
1661 | (*_bfd_error_handler) | |
1662 | (_("%s: `%s' has line numbers but no enclosing section"), | |
1663 | bfd_get_filename (abfd), name); | |
1664 | bfd_set_error (bfd_error_bad_value); | |
1665 | goto error_return; | |
1666 | } | |
1667 | linoff = (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr | |
1668 | - enclosing->line_filepos); | |
1669 | if (linoff < enclosing->lineno_count * linesz) | |
1670 | { | |
1671 | struct internal_lineno lin; | |
1672 | bfd_byte *linpstart; | |
1673 | ||
1674 | linpstart = (reloc_info[enclosing->target_index].linenos | |
1675 | + linoff); | |
1676 | bfd_coff_swap_lineno_in (abfd, (PTR) linpstart, (PTR) &lin); | |
1677 | if (lin.l_lnno == 0 | |
1678 | && ((bfd_size_type) lin.l_addr.l_symndx | |
1679 | == ((esym | |
1680 | - (bfd_byte *) obj_coff_external_syms (abfd)) | |
1681 | / symesz))) | |
1682 | { | |
1683 | bfd_byte *linpend, *linp; | |
1684 | ||
1685 | linpend = (reloc_info[enclosing->target_index].linenos | |
1686 | + enclosing->lineno_count * linesz); | |
1687 | for (linp = linpstart + linesz; | |
1688 | linp < linpend; | |
1689 | linp += linesz) | |
1690 | { | |
1691 | bfd_coff_swap_lineno_in (abfd, (PTR) linp, | |
1692 | (PTR) &lin); | |
1693 | if (lin.l_lnno == 0) | |
1694 | break; | |
1695 | } | |
1696 | csect->lineno_count += (linp - linpstart) / linesz; | |
1697 | /* The setting of line_filepos will only be | |
1698 | useful if all the line number entries for a | |
1699 | csect are contiguous; this only matters for | |
1700 | error reporting. */ | |
1701 | if (csect->line_filepos == 0) | |
1702 | csect->line_filepos = | |
1703 | auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr; | |
1704 | } | |
1705 | } | |
1706 | } | |
1707 | } | |
1708 | ||
1709 | /* Pick up the csect auxiliary information. */ | |
1710 | ||
1711 | if (sym.n_numaux == 0) | |
1712 | { | |
1713 | (*_bfd_error_handler) | |
1714 | (_("%s: class %d symbol `%s' has no aux entries"), | |
1715 | bfd_get_filename (abfd), sym.n_sclass, name); | |
1716 | bfd_set_error (bfd_error_bad_value); | |
1717 | goto error_return; | |
1718 | } | |
1719 | ||
1720 | bfd_coff_swap_aux_in (abfd, | |
1721 | (PTR) (esym + symesz * sym.n_numaux), | |
1722 | sym.n_type, sym.n_sclass, | |
1723 | sym.n_numaux - 1, sym.n_numaux, | |
1724 | (PTR) &aux); | |
1725 | ||
1726 | smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp); | |
1727 | ||
1728 | flags = BSF_GLOBAL; | |
1729 | section = NULL; | |
1730 | value = 0; | |
1731 | set_toc = NULL; | |
1732 | ||
1733 | switch (smtyp) | |
1734 | { | |
1735 | default: | |
1736 | (*_bfd_error_handler) | |
1737 | (_("%s: symbol `%s' has unrecognized csect type %d"), | |
1738 | bfd_get_filename (abfd), name, smtyp); | |
1739 | bfd_set_error (bfd_error_bad_value); | |
1740 | goto error_return; | |
1741 | ||
1742 | case XTY_ER: | |
1743 | /* This is an external reference. */ | |
1744 | if (sym.n_sclass == C_HIDEXT | |
1745 | || sym.n_scnum != N_UNDEF | |
1746 | || aux.x_csect.x_scnlen.l != 0) | |
1747 | { | |
1748 | (*_bfd_error_handler) | |
1749 | (_("%s: bad XTY_ER symbol `%s': class %d scnum %d scnlen %d"), | |
1750 | bfd_get_filename (abfd), name, sym.n_sclass, sym.n_scnum, | |
1751 | aux.x_csect.x_scnlen.l); | |
1752 | bfd_set_error (bfd_error_bad_value); | |
1753 | goto error_return; | |
1754 | } | |
1755 | ||
1756 | /* An XMC_XO external reference is actually a reference to | |
1757 | an absolute location. */ | |
1758 | if (aux.x_csect.x_smclas != XMC_XO) | |
1759 | section = bfd_und_section_ptr; | |
1760 | else | |
1761 | { | |
1762 | section = bfd_abs_section_ptr; | |
1763 | value = sym.n_value; | |
1764 | } | |
1765 | break; | |
1766 | ||
1767 | case XTY_SD: | |
1768 | /* This is a csect definition. */ | |
1769 | ||
1770 | if (csect != NULL) | |
1771 | { | |
1772 | xcoff_section_data (abfd, csect)->last_symndx = | |
1773 | ((esym | |
1774 | - (bfd_byte *) obj_coff_external_syms (abfd)) | |
1775 | / symesz); | |
1776 | } | |
1777 | ||
1778 | csect = NULL; | |
1779 | csect_index = -1; | |
1780 | ||
1781 | /* When we see a TOC anchor, we record the TOC value. */ | |
1782 | if (aux.x_csect.x_smclas == XMC_TC0) | |
1783 | { | |
1784 | if (sym.n_sclass != C_HIDEXT | |
1785 | || aux.x_csect.x_scnlen.l != 0) | |
1786 | { | |
1787 | (*_bfd_error_handler) | |
1788 | (_("%s: XMC_TC0 symbol `%s' is class %d scnlen %d"), | |
1789 | bfd_get_filename (abfd), name, sym.n_sclass, | |
1790 | aux.x_csect.x_scnlen.l); | |
1791 | bfd_set_error (bfd_error_bad_value); | |
1792 | goto error_return; | |
1793 | } | |
1794 | xcoff_data (abfd)->toc = sym.n_value; | |
1795 | } | |
1796 | ||
1797 | /* We must merge TOC entries for the same symbol. We can | |
1798 | merge two TOC entries if they are both C_HIDEXT, they | |
1799 | both have the same name, they are both 4 bytes long, and | |
1800 | they both have a relocation table entry for an external | |
1801 | symbol with the same name. Unfortunately, this means | |
1802 | that we must look through the relocations. Ick. */ | |
1803 | if (aux.x_csect.x_smclas == XMC_TC | |
1804 | && sym.n_sclass == C_HIDEXT | |
1805 | && aux.x_csect.x_scnlen.l == 4 | |
1806 | && info->hash->creator == abfd->xvec) | |
1807 | { | |
1808 | asection *enclosing; | |
1809 | struct internal_reloc *relocs; | |
1810 | bfd_size_type relindx; | |
1811 | struct internal_reloc *rel; | |
1812 | ||
1813 | enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum); | |
1814 | if (enclosing == NULL) | |
1815 | goto error_return; | |
1816 | ||
1817 | relocs = reloc_info[enclosing->target_index].relocs; | |
1818 | relindx = xcoff_find_reloc (relocs, enclosing->reloc_count, | |
1819 | sym.n_value); | |
1820 | rel = relocs + relindx; | |
1821 | if (relindx < enclosing->reloc_count | |
1822 | && rel->r_vaddr == (bfd_vma) sym.n_value | |
1823 | && rel->r_size == 31 | |
1824 | && rel->r_type == R_POS) | |
1825 | { | |
1826 | bfd_byte *erelsym; | |
1827 | struct internal_syment relsym; | |
1828 | ||
1829 | erelsym = ((bfd_byte *) obj_coff_external_syms (abfd) | |
1830 | + rel->r_symndx * symesz); | |
1831 | bfd_coff_swap_sym_in (abfd, (PTR) erelsym, (PTR) &relsym); | |
1832 | if (relsym.n_sclass == C_EXT) | |
1833 | { | |
1834 | const char *relname; | |
1835 | char relbuf[SYMNMLEN + 1]; | |
1836 | boolean copy; | |
1837 | struct xcoff_link_hash_entry *h; | |
1838 | ||
1839 | /* At this point we know that the TOC entry is | |
1840 | for an externally visible symbol. */ | |
1841 | relname = _bfd_coff_internal_syment_name (abfd, &relsym, | |
1842 | relbuf); | |
1843 | if (relname == NULL) | |
1844 | goto error_return; | |
1845 | ||
1846 | /* We only merge TOC entries if the TC name is | |
1847 | the same as the symbol name. This handles | |
1848 | the normal case, but not common cases like | |
1849 | SYM.P4 which gcc generates to store SYM + 4 | |
1850 | in the TOC. FIXME. */ | |
1851 | if (strcmp (name, relname) == 0) | |
1852 | { | |
1853 | copy = (! info->keep_memory | |
1854 | || relsym._n._n_n._n_zeroes != 0 | |
1855 | || relsym._n._n_n._n_offset == 0); | |
1856 | h = xcoff_link_hash_lookup (xcoff_hash_table (info), | |
1857 | relname, true, copy, | |
1858 | false); | |
1859 | if (h == NULL) | |
1860 | goto error_return; | |
1861 | ||
1862 | /* At this point h->root.type could be | |
1863 | bfd_link_hash_new. That should be OK, | |
1864 | since we know for sure that we will come | |
1865 | across this symbol as we step through the | |
1866 | file. */ | |
1867 | ||
1868 | /* We store h in *sym_hash for the | |
1869 | convenience of the relocate_section | |
1870 | function. */ | |
1871 | *sym_hash = h; | |
1872 | ||
1873 | if (h->toc_section != NULL) | |
1874 | { | |
1875 | asection **rel_csects; | |
1876 | ||
1877 | /* We already have a TOC entry for this | |
1878 | symbol, so we can just ignore this | |
1879 | one. */ | |
1880 | rel_csects = | |
1881 | reloc_info[enclosing->target_index].csects; | |
1882 | rel_csects[relindx] = bfd_und_section_ptr; | |
1883 | break; | |
1884 | } | |
1885 | ||
1886 | /* We are about to create a TOC entry for | |
1887 | this symbol. */ | |
1888 | set_toc = h; | |
1889 | } | |
1890 | } | |
1891 | } | |
1892 | } | |
1893 | ||
1894 | /* We need to create a new section. We get the name from | |
1895 | the csect storage mapping class, so that the linker can | |
1896 | accumulate similar csects together. */ | |
1897 | { | |
1898 | static const char *csect_name_by_class[] = | |
1899 | { | |
1900 | ".pr", ".ro", ".db", ".tc", ".ua", ".rw", ".gl", ".xo", | |
1901 | ".sv", ".bs", ".ds", ".uc", ".ti", ".tb", NULL, ".tc0", | |
1902 | ".td" | |
1903 | }; | |
1904 | const char *csect_name; | |
1905 | asection *enclosing; | |
1906 | ||
1907 | if ((aux.x_csect.x_smclas >= | |
1908 | sizeof csect_name_by_class / sizeof csect_name_by_class[0]) | |
1909 | || csect_name_by_class[aux.x_csect.x_smclas] == NULL) | |
1910 | { | |
1911 | (*_bfd_error_handler) | |
1912 | (_("%s: symbol `%s' has unrecognized smclas %d"), | |
1913 | bfd_get_filename (abfd), name, aux.x_csect.x_smclas); | |
1914 | bfd_set_error (bfd_error_bad_value); | |
1915 | goto error_return; | |
1916 | } | |
1917 | ||
1918 | csect_name = csect_name_by_class[aux.x_csect.x_smclas]; | |
1919 | csect = bfd_make_section_anyway (abfd, csect_name); | |
1920 | if (csect == NULL) | |
1921 | goto error_return; | |
1922 | enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum); | |
1923 | if (enclosing == NULL) | |
1924 | goto error_return; | |
1925 | if (! bfd_is_abs_section (enclosing) | |
1926 | && ((bfd_vma) sym.n_value < enclosing->vma | |
1927 | || ((bfd_vma) sym.n_value + aux.x_csect.x_scnlen.l | |
1928 | > enclosing->vma + enclosing->_raw_size))) | |
1929 | { | |
1930 | (*_bfd_error_handler) | |
1931 | (_("%s: csect `%s' not in enclosing section"), | |
1932 | bfd_get_filename (abfd), name); | |
1933 | bfd_set_error (bfd_error_bad_value); | |
1934 | goto error_return; | |
1935 | } | |
1936 | csect->vma = sym.n_value; | |
1937 | csect->filepos = (enclosing->filepos | |
1938 | + sym.n_value | |
1939 | - enclosing->vma); | |
1940 | csect->_raw_size = aux.x_csect.x_scnlen.l; | |
1941 | csect->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; | |
1942 | csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp); | |
1943 | ||
1944 | /* Record the enclosing section in the tdata for this new | |
1945 | section. */ | |
1946 | csect->used_by_bfd = | |
1947 | (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata)); | |
1948 | if (csect->used_by_bfd == NULL) | |
1949 | goto error_return; | |
1950 | coff_section_data (abfd, csect)->tdata = | |
1951 | bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata)); | |
1952 | if (coff_section_data (abfd, csect)->tdata == NULL) | |
1953 | goto error_return; | |
1954 | xcoff_section_data (abfd, csect)->enclosing = enclosing; | |
1955 | xcoff_section_data (abfd, csect)->lineno_count = | |
1956 | enclosing->lineno_count; | |
1957 | ||
1958 | if (enclosing->owner == abfd) | |
1959 | { | |
1960 | struct internal_reloc *relocs; | |
1961 | bfd_size_type relindx; | |
1962 | struct internal_reloc *rel; | |
1963 | asection **rel_csect; | |
1964 | ||
1965 | relocs = reloc_info[enclosing->target_index].relocs; | |
1966 | relindx = xcoff_find_reloc (relocs, enclosing->reloc_count, | |
1967 | csect->vma); | |
1968 | rel = relocs + relindx; | |
1969 | rel_csect = (reloc_info[enclosing->target_index].csects | |
1970 | + relindx); | |
1971 | csect->rel_filepos = (enclosing->rel_filepos | |
1972 | + relindx * bfd_coff_relsz (abfd)); | |
1973 | while (relindx < enclosing->reloc_count | |
1974 | && *rel_csect == NULL | |
1975 | && rel->r_vaddr < csect->vma + csect->_raw_size) | |
1976 | { | |
1977 | *rel_csect = csect; | |
1978 | csect->flags |= SEC_RELOC; | |
1979 | ++csect->reloc_count; | |
1980 | ++relindx; | |
1981 | ++rel; | |
1982 | ++rel_csect; | |
1983 | } | |
1984 | } | |
1985 | ||
1986 | /* There are a number of other fields and section flags | |
1987 | which we do not bother to set. */ | |
1988 | ||
1989 | csect_index = ((esym | |
1990 | - (bfd_byte *) obj_coff_external_syms (abfd)) | |
1991 | / symesz); | |
1992 | ||
1993 | xcoff_section_data (abfd, csect)->first_symndx = csect_index; | |
1994 | ||
1995 | if (first_csect == NULL) | |
1996 | first_csect = csect; | |
1997 | ||
1998 | /* If this symbol is C_EXT, we treat it as starting at the | |
1999 | beginning of the newly created section. */ | |
2000 | if (sym.n_sclass == C_EXT) | |
2001 | { | |
2002 | section = csect; | |
2003 | value = 0; | |
2004 | } | |
2005 | ||
2006 | /* If this is a TOC section for a symbol, record it. */ | |
2007 | if (set_toc != NULL) | |
2008 | set_toc->toc_section = csect; | |
2009 | } | |
2010 | break; | |
2011 | ||
2012 | case XTY_LD: | |
2013 | /* This is a label definition. The x_scnlen field is the | |
2014 | symbol index of the csect. I believe that this must | |
2015 | always follow the appropriate XTY_SD symbol, so I will | |
2016 | insist on it. */ | |
2017 | { | |
2018 | boolean bad; | |
2019 | ||
2020 | bad = false; | |
2021 | if (aux.x_csect.x_scnlen.l < 0 | |
2022 | || (aux.x_csect.x_scnlen.l | |
2023 | >= esym - (bfd_byte *) obj_coff_external_syms (abfd))) | |
2024 | bad = true; | |
2025 | if (! bad) | |
2026 | { | |
2027 | section = xcoff_data (abfd)->csects[aux.x_csect.x_scnlen.l]; | |
2028 | if (section == NULL | |
2029 | || (section->flags & SEC_HAS_CONTENTS) == 0) | |
2030 | bad = true; | |
2031 | } | |
2032 | if (bad) | |
2033 | { | |
2034 | (*_bfd_error_handler) | |
2035 | (_("%s: misplaced XTY_LD `%s'"), | |
2036 | bfd_get_filename (abfd), name); | |
2037 | bfd_set_error (bfd_error_bad_value); | |
2038 | goto error_return; | |
2039 | } | |
2040 | ||
2041 | value = sym.n_value - csect->vma; | |
2042 | } | |
2043 | break; | |
2044 | ||
2045 | case XTY_CM: | |
2046 | /* This is an unitialized csect. We could base the name on | |
2047 | the storage mapping class, but we don't bother except for | |
2048 | an XMC_TD symbol. If this csect is externally visible, | |
2049 | it is a common symbol. We put XMC_TD symbols in sections | |
2050 | named .tocbss, and rely on the linker script to put that | |
2051 | in the TOC area. */ | |
2052 | ||
2053 | if (csect != NULL) | |
2054 | { | |
2055 | xcoff_section_data (abfd, csect)->last_symndx = | |
2056 | ((esym | |
2057 | - (bfd_byte *) obj_coff_external_syms (abfd)) | |
2058 | / symesz); | |
2059 | } | |
2060 | ||
2061 | if (aux.x_csect.x_smclas == XMC_TD) | |
2062 | csect = bfd_make_section_anyway (abfd, ".tocbss"); | |
2063 | else | |
2064 | csect = bfd_make_section_anyway (abfd, ".bss"); | |
2065 | if (csect == NULL) | |
2066 | goto error_return; | |
2067 | csect->vma = sym.n_value; | |
2068 | csect->_raw_size = aux.x_csect.x_scnlen.l; | |
2069 | csect->flags |= SEC_ALLOC; | |
2070 | csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp); | |
2071 | /* There are a number of other fields and section flags | |
2072 | which we do not bother to set. */ | |
2073 | ||
2074 | csect_index = ((esym | |
2075 | - (bfd_byte *) obj_coff_external_syms (abfd)) | |
2076 | / symesz); | |
2077 | ||
2078 | csect->used_by_bfd = | |
2079 | (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata)); | |
2080 | if (csect->used_by_bfd == NULL) | |
2081 | goto error_return; | |
2082 | coff_section_data (abfd, csect)->tdata = | |
2083 | bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata)); | |
2084 | if (coff_section_data (abfd, csect)->tdata == NULL) | |
2085 | goto error_return; | |
2086 | xcoff_section_data (abfd, csect)->first_symndx = csect_index; | |
2087 | ||
2088 | if (first_csect == NULL) | |
2089 | first_csect = csect; | |
2090 | ||
2091 | if (sym.n_sclass == C_EXT) | |
2092 | { | |
2093 | csect->flags |= SEC_IS_COMMON; | |
2094 | csect->_raw_size = 0; | |
2095 | section = csect; | |
2096 | value = aux.x_csect.x_scnlen.l; | |
2097 | } | |
2098 | ||
2099 | break; | |
2100 | } | |
2101 | ||
2102 | /* Check for magic symbol names. */ | |
2103 | if ((smtyp == XTY_SD || smtyp == XTY_CM) | |
2104 | && aux.x_csect.x_smclas != XMC_TC | |
2105 | && aux.x_csect.x_smclas != XMC_TD) | |
2106 | { | |
2107 | int i; | |
2108 | ||
2109 | i = -1; | |
2110 | if (name[0] == '_') | |
2111 | { | |
2112 | if (strcmp (name, "_text") == 0) | |
2113 | i = 0; | |
2114 | else if (strcmp (name, "_etext") == 0) | |
2115 | i = 1; | |
2116 | else if (strcmp (name, "_data") == 0) | |
2117 | i = 2; | |
2118 | else if (strcmp (name, "_edata") == 0) | |
2119 | i = 3; | |
2120 | else if (strcmp (name, "_end") == 0) | |
2121 | i = 4; | |
2122 | } | |
2123 | else if (name[0] == 'e' && strcmp (name, "end") == 0) | |
2124 | i = 5; | |
2125 | ||
2126 | if (i != -1) | |
2127 | xcoff_hash_table (info)->special_sections[i] = csect; | |
2128 | } | |
2129 | ||
2130 | /* Now we have enough information to add the symbol to the | |
2131 | linker hash table. */ | |
2132 | ||
2133 | if (sym.n_sclass == C_EXT) | |
2134 | { | |
2135 | boolean copy; | |
2136 | ||
2137 | BFD_ASSERT (section != NULL); | |
2138 | ||
2139 | /* We must copy the name into memory if we got it from the | |
2140 | syment itself, rather than the string table. */ | |
2141 | copy = default_copy; | |
2142 | if (sym._n._n_n._n_zeroes != 0 | |
2143 | || sym._n._n_n._n_offset == 0) | |
2144 | copy = true; | |
2145 | ||
2146 | /* The AIX linker appears to only detect multiple symbol | |
2147 | definitions when there is a reference to the symbol. If | |
2148 | a symbol is defined multiple times, and the only | |
2149 | references are from the same object file, the AIX linker | |
2150 | appears to permit it. It does not merge the different | |
2151 | definitions, but handles them independently. On the | |
2152 | other hand, if there is a reference, the linker reports | |
2153 | an error. | |
2154 | ||
2155 | This matters because the AIX <net/net_globals.h> header | |
2156 | file actually defines an initialized array, so we have to | |
2157 | actually permit that to work. | |
2158 | ||
2159 | Just to make matters even more confusing, the AIX linker | |
2160 | appears to permit multiple symbol definitions whenever | |
2161 | the second definition is in an archive rather than an | |
2162 | object file. This may be a consequence of the manner in | |
2163 | which it handles archives: I think it may load the entire | |
2164 | archive in as separate csects, and then let garbage | |
2165 | collection discard symbols. | |
2166 | ||
2167 | We also have to handle the case of statically linking a | |
2168 | shared object, which will cause symbol redefinitions, | |
2169 | although this is an easier case to detect. */ | |
2170 | ||
2171 | if (info->hash->creator == abfd->xvec) | |
2172 | { | |
2173 | if (! bfd_is_und_section (section)) | |
2174 | *sym_hash = xcoff_link_hash_lookup (xcoff_hash_table (info), | |
2175 | name, true, copy, false); | |
2176 | else | |
2177 | *sym_hash = ((struct xcoff_link_hash_entry *) | |
2178 | bfd_wrapped_link_hash_lookup (abfd, info, name, | |
2179 | true, copy, false)); | |
2180 | if (*sym_hash == NULL) | |
2181 | goto error_return; | |
2182 | if (((*sym_hash)->root.type == bfd_link_hash_defined | |
2183 | || (*sym_hash)->root.type == bfd_link_hash_defweak) | |
2184 | && ! bfd_is_und_section (section) | |
2185 | && ! bfd_is_com_section (section)) | |
2186 | { | |
2187 | /* This is a second definition of a defined symbol. */ | |
2188 | if ((abfd->flags & DYNAMIC) != 0 | |
2189 | && ((*sym_hash)->smclas != XMC_GL | |
2190 | || aux.x_csect.x_smclas == XMC_GL | |
2191 | || ((*sym_hash)->root.u.def.section->owner->flags | |
2192 | & DYNAMIC) == 0)) | |
2193 | { | |
2194 | /* The new symbol is from a shared library, and | |
2195 | either the existing symbol is not global | |
2196 | linkage code or this symbol is global linkage | |
2197 | code. If the existing symbol is global | |
2198 | linkage code and the new symbol is not, then | |
2199 | we want to use the new symbol. */ | |
2200 | section = bfd_und_section_ptr; | |
2201 | value = 0; | |
2202 | } | |
2203 | else if (((*sym_hash)->root.u.def.section->owner->flags | |
2204 | & DYNAMIC) != 0) | |
2205 | { | |
2206 | /* The existing symbol is from a shared library. | |
2207 | Replace it. */ | |
2208 | (*sym_hash)->root.type = bfd_link_hash_undefined; | |
2209 | (*sym_hash)->root.u.undef.abfd = | |
2210 | (*sym_hash)->root.u.def.section->owner; | |
2211 | } | |
2212 | else if (abfd->my_archive != NULL) | |
2213 | { | |
2214 | /* This is a redefinition in an object contained | |
2215 | in an archive. Just ignore it. See the | |
2216 | comment above. */ | |
2217 | section = bfd_und_section_ptr; | |
2218 | value = 0; | |
2219 | } | |
2220 | else if ((*sym_hash)->root.next != NULL | |
2221 | || info->hash->undefs_tail == &(*sym_hash)->root) | |
2222 | { | |
2223 | /* This symbol has been referenced. In this | |
2224 | case, we just continue and permit the | |
2225 | multiple definition error. See the comment | |
2226 | above about the behaviour of the AIX linker. */ | |
2227 | } | |
2228 | else if ((*sym_hash)->smclas == aux.x_csect.x_smclas) | |
2229 | { | |
2230 | /* The symbols are both csects of the same | |
2231 | class. There is at least a chance that this | |
2232 | is a semi-legitimate redefinition. */ | |
2233 | section = bfd_und_section_ptr; | |
2234 | value = 0; | |
2235 | (*sym_hash)->flags |= XCOFF_MULTIPLY_DEFINED; | |
2236 | } | |
2237 | } | |
2238 | else if (((*sym_hash)->flags & XCOFF_MULTIPLY_DEFINED) != 0 | |
2239 | && ((*sym_hash)->root.type == bfd_link_hash_defined | |
2240 | || (*sym_hash)->root.type == bfd_link_hash_defweak) | |
2241 | && (bfd_is_und_section (section) | |
2242 | || bfd_is_com_section (section))) | |
2243 | { | |
2244 | /* This is a reference to a multiply defined symbol. | |
2245 | Report the error now. See the comment above | |
2246 | about the behaviour of the AIX linker. We could | |
2247 | also do this with warning symbols, but I'm not | |
2248 | sure the XCOFF linker is wholly prepared to | |
2249 | handle them, and that would only be a warning, | |
2250 | not an error. */ | |
2251 | if (! ((*info->callbacks->multiple_definition) | |
2252 | (info, (*sym_hash)->root.root.string, | |
2253 | (bfd *) NULL, (asection *) NULL, 0, | |
2254 | (*sym_hash)->root.u.def.section->owner, | |
2255 | (*sym_hash)->root.u.def.section, | |
2256 | (*sym_hash)->root.u.def.value))) | |
2257 | goto error_return; | |
2258 | /* Try not to give this error too many times. */ | |
2259 | (*sym_hash)->flags &= ~XCOFF_MULTIPLY_DEFINED; | |
2260 | } | |
2261 | } | |
2262 | ||
2263 | /* _bfd_generic_link_add_one_symbol may call the linker to | |
2264 | generate an error message, and the linker may try to read | |
2265 | the symbol table to give a good error. Right now, the | |
2266 | line numbers are in an inconsistent state, since they are | |
2267 | counted both in the real sections and in the new csects. | |
2268 | We need to leave the count in the real sections so that | |
2269 | the linker can report the line number of the error | |
2270 | correctly, so temporarily clobber the link to the csects | |
2271 | so that the linker will not try to read the line numbers | |
2272 | a second time from the csects. */ | |
2273 | BFD_ASSERT (last_real->next == first_csect); | |
2274 | last_real->next = NULL; | |
2275 | if (! (_bfd_generic_link_add_one_symbol | |
2276 | (info, abfd, name, flags, section, value, | |
2277 | (const char *) NULL, copy, true, | |
2278 | (struct bfd_link_hash_entry **) sym_hash))) | |
2279 | goto error_return; | |
2280 | last_real->next = first_csect; | |
2281 | ||
2282 | if (smtyp == XTY_CM) | |
2283 | { | |
2284 | if ((*sym_hash)->root.type != bfd_link_hash_common | |
2285 | || (*sym_hash)->root.u.c.p->section != csect) | |
2286 | { | |
2287 | /* We don't need the common csect we just created. */ | |
2288 | csect->_raw_size = 0; | |
2289 | } | |
2290 | else | |
2291 | { | |
2292 | (*sym_hash)->root.u.c.p->alignment_power | |
2293 | = csect->alignment_power; | |
2294 | } | |
2295 | } | |
2296 | ||
2297 | if (info->hash->creator == abfd->xvec) | |
2298 | { | |
2299 | int flag; | |
2300 | ||
2301 | if (smtyp == XTY_ER || smtyp == XTY_CM) | |
2302 | flag = XCOFF_REF_REGULAR; | |
2303 | else | |
2304 | flag = XCOFF_DEF_REGULAR; | |
2305 | (*sym_hash)->flags |= flag; | |
2306 | ||
2307 | if ((*sym_hash)->smclas == XMC_UA | |
2308 | || flag == XCOFF_DEF_REGULAR) | |
2309 | (*sym_hash)->smclas = aux.x_csect.x_smclas; | |
2310 | } | |
2311 | } | |
2312 | ||
2313 | *csect_cache = csect; | |
2314 | ||
2315 | esym += (sym.n_numaux + 1) * symesz; | |
2316 | sym_hash += sym.n_numaux + 1; | |
2317 | csect_cache += sym.n_numaux + 1; | |
2318 | } | |
2319 | ||
2320 | BFD_ASSERT (last_real == NULL || last_real->next == first_csect); | |
2321 | ||
2322 | /* Make sure that we have seen all the relocs. */ | |
2323 | for (o = abfd->sections; o != first_csect; o = o->next) | |
2324 | { | |
2325 | /* Reset the section size and the line number count, since the | |
2326 | data is now attached to the csects. Don't reset the size of | |
2327 | the .debug section, since we need to read it below in | |
2328 | bfd_xcoff_size_dynamic_sections. */ | |
2329 | if (strcmp (bfd_get_section_name (abfd, o), ".debug") != 0) | |
2330 | o->_raw_size = 0; | |
2331 | o->lineno_count = 0; | |
2332 | ||
2333 | if ((o->flags & SEC_RELOC) != 0) | |
2334 | { | |
2335 | bfd_size_type i; | |
2336 | struct internal_reloc *rel; | |
2337 | asection **rel_csect; | |
2338 | ||
2339 | rel = reloc_info[o->target_index].relocs; | |
2340 | rel_csect = reloc_info[o->target_index].csects; | |
2341 | for (i = 0; i < o->reloc_count; i++, rel++, rel_csect++) | |
2342 | { | |
2343 | if (*rel_csect == NULL) | |
2344 | { | |
2345 | (*_bfd_error_handler) | |
2346 | (_("%s: reloc %s:%d not in csect"), | |
2347 | bfd_get_filename (abfd), o->name, i); | |
2348 | bfd_set_error (bfd_error_bad_value); | |
2349 | goto error_return; | |
2350 | } | |
2351 | ||
2352 | /* We identify all symbols which are called, so that we | |
2353 | can create glue code for calls to functions imported | |
2354 | from dynamic objects. */ | |
2355 | if (info->hash->creator == abfd->xvec | |
2356 | && *rel_csect != bfd_und_section_ptr | |
2357 | && (rel->r_type == R_BR | |
2358 | || rel->r_type == R_RBR) | |
2359 | && obj_xcoff_sym_hashes (abfd)[rel->r_symndx] != NULL) | |
2360 | { | |
2361 | struct xcoff_link_hash_entry *h; | |
2362 | ||
2363 | h = obj_xcoff_sym_hashes (abfd)[rel->r_symndx]; | |
2364 | h->flags |= XCOFF_CALLED; | |
2365 | /* If the symbol name starts with a period, it is | |
2366 | the code of a function. If the symbol is | |
2367 | currently undefined, then add an undefined symbol | |
2368 | for the function descriptor. This should do no | |
2369 | harm, because any regular object that defines the | |
2370 | function should also define the function | |
2371 | descriptor. It helps, because it means that we | |
2372 | will identify the function descriptor with a | |
2373 | dynamic object if a dynamic object defines it. */ | |
2374 | if (h->root.root.string[0] == '.' | |
2375 | && h->descriptor == NULL) | |
2376 | { | |
2377 | struct xcoff_link_hash_entry *hds; | |
2378 | ||
2379 | hds = xcoff_link_hash_lookup (xcoff_hash_table (info), | |
2380 | h->root.root.string + 1, | |
2381 | true, false, true); | |
2382 | if (hds == NULL) | |
2383 | goto error_return; | |
2384 | if (hds->root.type == bfd_link_hash_new) | |
2385 | { | |
2386 | if (! (_bfd_generic_link_add_one_symbol | |
2387 | (info, abfd, hds->root.root.string, | |
2388 | (flagword) 0, bfd_und_section_ptr, | |
2389 | (bfd_vma) 0, (const char *) NULL, false, | |
2390 | true, | |
2391 | (struct bfd_link_hash_entry **) &hds))) | |
2392 | goto error_return; | |
2393 | } | |
2394 | hds->flags |= XCOFF_DESCRIPTOR; | |
2395 | BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0 | |
2396 | && (h->flags & XCOFF_DESCRIPTOR) == 0); | |
2397 | hds->descriptor = h; | |
2398 | h->descriptor = hds; | |
2399 | } | |
2400 | } | |
2401 | } | |
2402 | ||
2403 | free (reloc_info[o->target_index].csects); | |
2404 | reloc_info[o->target_index].csects = NULL; | |
2405 | ||
2406 | /* Reset SEC_RELOC and the reloc_count, since the reloc | |
2407 | information is now attached to the csects. */ | |
2408 | o->flags &=~ SEC_RELOC; | |
2409 | o->reloc_count = 0; | |
2410 | ||
2411 | /* If we are not keeping memory, free the reloc information. */ | |
2412 | if (! info->keep_memory | |
2413 | && coff_section_data (abfd, o) != NULL | |
2414 | && coff_section_data (abfd, o)->relocs != NULL | |
2415 | && ! coff_section_data (abfd, o)->keep_relocs) | |
2416 | { | |
2417 | free (coff_section_data (abfd, o)->relocs); | |
2418 | coff_section_data (abfd, o)->relocs = NULL; | |
2419 | } | |
2420 | } | |
2421 | ||
2422 | /* Free up the line numbers. FIXME: We could cache these | |
2423 | somewhere for the final link, to avoid reading them again. */ | |
2424 | if (reloc_info[o->target_index].linenos != NULL) | |
2425 | { | |
2426 | free (reloc_info[o->target_index].linenos); | |
2427 | reloc_info[o->target_index].linenos = NULL; | |
2428 | } | |
2429 | } | |
2430 | ||
2431 | free (reloc_info); | |
2432 | ||
2433 | obj_coff_keep_syms (abfd) = keep_syms; | |
2434 | ||
2435 | return true; | |
2436 | ||
2437 | error_return: | |
2438 | if (reloc_info != NULL) | |
2439 | { | |
2440 | for (o = abfd->sections; o != NULL; o = o->next) | |
2441 | { | |
2442 | if (reloc_info[o->target_index].csects != NULL) | |
2443 | free (reloc_info[o->target_index].csects); | |
2444 | if (reloc_info[o->target_index].linenos != NULL) | |
2445 | free (reloc_info[o->target_index].linenos); | |
2446 | } | |
2447 | free (reloc_info); | |
2448 | } | |
2449 | obj_coff_keep_syms (abfd) = keep_syms; | |
2450 | return false; | |
2451 | } | |
2452 | ||
2453 | #undef N_TMASK | |
2454 | #undef N_BTSHFT | |
2455 | ||
2456 | /* This function is used to add symbols from a dynamic object to the | |
2457 | global symbol table. */ | |
2458 | ||
2459 | static boolean | |
2460 | xcoff_link_add_dynamic_symbols (abfd, info) | |
2461 | bfd *abfd; | |
2462 | struct bfd_link_info *info; | |
2463 | { | |
2464 | asection *lsec; | |
2465 | bfd_byte *buf; | |
2466 | struct internal_ldhdr ldhdr; | |
2467 | const char *strings; | |
2468 | struct external_ldsym *elsym, *elsymend; | |
2469 | struct xcoff_import_file *n; | |
2470 | const char *bname; | |
2471 | const char *mname; | |
2472 | const char *s; | |
2473 | unsigned int c; | |
2474 | struct xcoff_import_file **pp; | |
2475 | ||
2476 | /* We can only handle a dynamic object if we are generating an XCOFF | |
2477 | output file. */ | |
2478 | if (info->hash->creator != abfd->xvec) | |
2479 | { | |
2480 | (*_bfd_error_handler) | |
2481 | (_("%s: XCOFF shared object when not producing XCOFF output"), | |
2482 | bfd_get_filename (abfd)); | |
2483 | bfd_set_error (bfd_error_invalid_operation); | |
2484 | return false; | |
2485 | } | |
2486 | ||
2487 | /* The symbols we use from a dynamic object are not the symbols in | |
2488 | the normal symbol table, but, rather, the symbols in the export | |
2489 | table. If there is a global symbol in a dynamic object which is | |
2490 | not in the export table, the loader will not be able to find it, | |
2491 | so we don't want to find it either. Also, on AIX 4.1.3, shr.o in | |
2492 | libc.a has symbols in the export table which are not in the | |
2493 | symbol table. */ | |
2494 | ||
2495 | /* Read in the .loader section. FIXME: We should really use the | |
2496 | o_snloader field in the a.out header, rather than grabbing the | |
2497 | section by name. */ | |
2498 | lsec = bfd_get_section_by_name (abfd, ".loader"); | |
2499 | if (lsec == NULL) | |
2500 | { | |
2501 | (*_bfd_error_handler) | |
2502 | (_("%s: dynamic object with no .loader section"), | |
2503 | bfd_get_filename (abfd)); | |
2504 | bfd_set_error (bfd_error_no_symbols); | |
2505 | return false; | |
2506 | } | |
2507 | ||
2508 | if (! xcoff_get_section_contents (abfd, lsec)) | |
2509 | return false; | |
2510 | buf = coff_section_data (abfd, lsec)->contents; | |
2511 | ||
2512 | /* Remove the sections from this object, so that they do not get | |
2513 | included in the link. */ | |
2514 | abfd->sections = NULL; | |
2515 | ||
2516 | xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr); | |
2517 | ||
2518 | strings = (char *) buf + ldhdr.l_stoff; | |
2519 | ||
2520 | elsym = (struct external_ldsym *) (buf + LDHDRSZ); | |
2521 | elsymend = elsym + ldhdr.l_nsyms; | |
2522 | BFD_ASSERT (sizeof (struct external_ldsym) == LDSYMSZ); | |
2523 | for (; elsym < elsymend; elsym++) | |
2524 | { | |
2525 | struct internal_ldsym ldsym; | |
2526 | char nambuf[SYMNMLEN + 1]; | |
2527 | const char *name; | |
2528 | struct xcoff_link_hash_entry *h; | |
2529 | ||
2530 | xcoff_swap_ldsym_in (abfd, elsym, &ldsym); | |
2531 | ||
2532 | /* We are only interested in exported symbols. */ | |
2533 | if ((ldsym.l_smtype & L_EXPORT) == 0) | |
2534 | continue; | |
2535 | ||
2536 | if (ldsym._l._l_l._l_zeroes == 0) | |
2537 | name = strings + ldsym._l._l_l._l_offset; | |
2538 | else | |
2539 | { | |
2540 | memcpy (nambuf, ldsym._l._l_name, SYMNMLEN); | |
2541 | nambuf[SYMNMLEN] = '\0'; | |
2542 | name = nambuf; | |
2543 | } | |
2544 | ||
2545 | /* Normally we could not call xcoff_link_hash_lookup in an add | |
2546 | symbols routine, since we might not be using an XCOFF hash | |
2547 | table. However, we verified above that we are using an XCOFF | |
2548 | hash table. */ | |
2549 | ||
2550 | h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true, | |
2551 | true, true); | |
2552 | if (h == NULL) | |
2553 | return false; | |
2554 | ||
2555 | h->flags |= XCOFF_DEF_DYNAMIC; | |
2556 | ||
2557 | /* If the symbol is undefined, and the BFD it was found in is | |
2558 | not a dynamic object, change the BFD to this dynamic object, | |
2559 | so that we can get the correct import file ID. */ | |
2560 | if ((h->root.type == bfd_link_hash_undefined | |
2561 | || h->root.type == bfd_link_hash_undefweak) | |
2562 | && (h->root.u.undef.abfd == NULL | |
2563 | || (h->root.u.undef.abfd->flags & DYNAMIC) == 0)) | |
2564 | h->root.u.undef.abfd = abfd; | |
2565 | ||
2566 | if (h->root.type == bfd_link_hash_new) | |
2567 | { | |
2568 | h->root.type = bfd_link_hash_undefined; | |
2569 | h->root.u.undef.abfd = abfd; | |
2570 | /* We do not want to add this to the undefined symbol list. */ | |
2571 | } | |
2572 | ||
2573 | if (h->smclas == XMC_UA | |
2574 | || h->root.type == bfd_link_hash_undefined | |
2575 | || h->root.type == bfd_link_hash_undefweak) | |
2576 | h->smclas = ldsym.l_smclas; | |
2577 | ||
2578 | /* Unless this is an XMC_XO symbol, we don't bother to actually | |
2579 | define it, since we don't have a section to put it in anyhow. | |
2580 | Instead, the relocation routines handle the DEF_DYNAMIC flag | |
2581 | correctly. */ | |
2582 | ||
2583 | if (h->smclas == XMC_XO | |
2584 | && (h->root.type == bfd_link_hash_undefined | |
2585 | || h->root.type == bfd_link_hash_undefweak)) | |
2586 | { | |
2587 | /* This symbol has an absolute value. */ | |
2588 | h->root.type = bfd_link_hash_defined; | |
2589 | h->root.u.def.section = bfd_abs_section_ptr; | |
2590 | h->root.u.def.value = ldsym.l_value; | |
2591 | } | |
2592 | ||
2593 | /* If this symbol defines a function descriptor, then it | |
2594 | implicitly defines the function code as well. */ | |
2595 | if (h->smclas == XMC_DS | |
2596 | || (h->smclas == XMC_XO && name[0] != '.')) | |
2597 | h->flags |= XCOFF_DESCRIPTOR; | |
2598 | if ((h->flags & XCOFF_DESCRIPTOR) != 0) | |
2599 | { | |
2600 | struct xcoff_link_hash_entry *hds; | |
2601 | ||
2602 | hds = h->descriptor; | |
2603 | if (hds == NULL) | |
2604 | { | |
2605 | char *dsnm; | |
2606 | ||
2607 | dsnm = bfd_malloc (strlen (name) + 2); | |
2608 | if (dsnm == NULL) | |
2609 | return false; | |
2610 | dsnm[0] = '.'; | |
2611 | strcpy (dsnm + 1, name); | |
2612 | hds = xcoff_link_hash_lookup (xcoff_hash_table (info), dsnm, | |
2613 | true, true, true); | |
2614 | free (dsnm); | |
2615 | if (hds == NULL) | |
2616 | return false; | |
2617 | ||
2618 | if (hds->root.type == bfd_link_hash_new) | |
2619 | { | |
2620 | hds->root.type = bfd_link_hash_undefined; | |
2621 | hds->root.u.undef.abfd = abfd; | |
2622 | /* We do not want to add this to the undefined | |
2623 | symbol list. */ | |
2624 | } | |
2625 | ||
2626 | hds->descriptor = h; | |
2627 | h->descriptor = hds; | |
2628 | } | |
2629 | ||
2630 | hds->flags |= XCOFF_DEF_DYNAMIC; | |
2631 | if (hds->smclas == XMC_UA) | |
2632 | hds->smclas = XMC_PR; | |
2633 | ||
2634 | /* An absolute symbol appears to actually define code, not a | |
2635 | function descriptor. This is how some math functions are | |
2636 | implemented on AIX 4.1. */ | |
2637 | if (h->smclas == XMC_XO | |
2638 | && (hds->root.type == bfd_link_hash_undefined | |
2639 | || hds->root.type == bfd_link_hash_undefweak)) | |
2640 | { | |
2641 | hds->smclas = XMC_XO; | |
2642 | hds->root.type = bfd_link_hash_defined; | |
2643 | hds->root.u.def.section = bfd_abs_section_ptr; | |
2644 | hds->root.u.def.value = ldsym.l_value; | |
2645 | } | |
2646 | } | |
2647 | } | |
2648 | ||
2649 | if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents) | |
2650 | { | |
2651 | free (coff_section_data (abfd, lsec)->contents); | |
2652 | coff_section_data (abfd, lsec)->contents = NULL; | |
2653 | } | |
2654 | ||
2655 | /* Record this file in the import files. */ | |
2656 | ||
2657 | n = ((struct xcoff_import_file *) | |
2658 | bfd_alloc (abfd, sizeof (struct xcoff_import_file))); | |
2659 | if (n == NULL) | |
2660 | return false; | |
2661 | n->next = NULL; | |
2662 | ||
2663 | /* For some reason, the path entry in the import file list for a | |
2664 | shared object appears to always be empty. The file name is the | |
2665 | base name. */ | |
2666 | n->path = ""; | |
2667 | if (abfd->my_archive == NULL) | |
2668 | { | |
2669 | bname = bfd_get_filename (abfd); | |
2670 | mname = ""; | |
2671 | } | |
2672 | else | |
2673 | { | |
2674 | bname = bfd_get_filename (abfd->my_archive); | |
2675 | mname = bfd_get_filename (abfd); | |
2676 | } | |
2677 | s = strrchr (bname, '/'); | |
2678 | if (s != NULL) | |
2679 | bname = s + 1; | |
2680 | n->file = bname; | |
2681 | n->member = mname; | |
2682 | ||
2683 | /* We start c at 1 because the first import file number is reserved | |
2684 | for LIBPATH. */ | |
2685 | for (pp = &xcoff_hash_table (info)->imports, c = 1; | |
2686 | *pp != NULL; | |
2687 | pp = &(*pp)->next, ++c) | |
2688 | ; | |
2689 | *pp = n; | |
2690 | ||
2691 | xcoff_data (abfd)->import_file_id = c; | |
2692 | ||
2693 | return true; | |
2694 | } | |
2695 | \f | |
2696 | /* Routines that are called after all the input files have been | |
2697 | handled, but before the sections are laid out in memory. */ | |
2698 | ||
2699 | /* Mark a symbol as not being garbage, including the section in which | |
2700 | it is defined. */ | |
2701 | ||
2702 | static INLINE boolean | |
2703 | xcoff_mark_symbol (info, h) | |
2704 | struct bfd_link_info *info; | |
2705 | struct xcoff_link_hash_entry *h; | |
2706 | { | |
2707 | if ((h->flags & XCOFF_MARK) != 0) | |
2708 | return true; | |
2709 | ||
2710 | h->flags |= XCOFF_MARK; | |
2711 | if (h->root.type == bfd_link_hash_defined | |
2712 | || h->root.type == bfd_link_hash_defweak) | |
2713 | { | |
2714 | asection *hsec; | |
2715 | ||
2716 | hsec = h->root.u.def.section; | |
2717 | if (! bfd_is_abs_section (hsec) | |
2718 | && (hsec->flags & SEC_MARK) == 0) | |
2719 | { | |
2720 | if (! xcoff_mark (info, hsec)) | |
2721 | return false; | |
2722 | } | |
2723 | } | |
2724 | ||
2725 | if (h->toc_section != NULL | |
2726 | && (h->toc_section->flags & SEC_MARK) == 0) | |
2727 | { | |
2728 | if (! xcoff_mark (info, h->toc_section)) | |
2729 | return false; | |
2730 | } | |
2731 | ||
2732 | return true; | |
2733 | } | |
2734 | ||
2735 | /* The mark phase of garbage collection. For a given section, mark | |
2736 | it, and all the sections which define symbols to which it refers. | |
2737 | Because this function needs to look at the relocs, we also count | |
2738 | the number of relocs which need to be copied into the .loader | |
2739 | section. */ | |
2740 | ||
2741 | static boolean | |
2742 | xcoff_mark (info, sec) | |
2743 | struct bfd_link_info *info; | |
2744 | asection *sec; | |
2745 | { | |
2746 | if (bfd_is_abs_section (sec) | |
2747 | || (sec->flags & SEC_MARK) != 0) | |
2748 | return true; | |
2749 | ||
2750 | sec->flags |= SEC_MARK; | |
2751 | ||
2752 | if (sec->owner->xvec == info->hash->creator | |
2753 | && coff_section_data (sec->owner, sec) != NULL | |
2754 | && xcoff_section_data (sec->owner, sec) != NULL) | |
2755 | { | |
2756 | register struct xcoff_link_hash_entry **hp, **hpend; | |
2757 | struct internal_reloc *rel, *relend; | |
2758 | ||
2759 | /* Mark all the symbols in this section. */ | |
2760 | ||
2761 | hp = (obj_xcoff_sym_hashes (sec->owner) | |
2762 | + xcoff_section_data (sec->owner, sec)->first_symndx); | |
2763 | hpend = (obj_xcoff_sym_hashes (sec->owner) | |
2764 | + xcoff_section_data (sec->owner, sec)->last_symndx); | |
2765 | for (; hp < hpend; hp++) | |
2766 | { | |
2767 | register struct xcoff_link_hash_entry *h; | |
2768 | ||
2769 | h = *hp; | |
2770 | if (h != NULL | |
2771 | && (h->flags & XCOFF_MARK) == 0) | |
2772 | { | |
2773 | if (! xcoff_mark_symbol (info, h)) | |
2774 | return false; | |
2775 | } | |
2776 | } | |
2777 | ||
2778 | /* Look through the section relocs. */ | |
2779 | ||
2780 | if ((sec->flags & SEC_RELOC) != 0 | |
2781 | && sec->reloc_count > 0) | |
2782 | { | |
2783 | rel = xcoff_read_internal_relocs (sec->owner, sec, true, | |
2784 | (bfd_byte *) NULL, false, | |
2785 | (struct internal_reloc *) NULL); | |
2786 | if (rel == NULL) | |
2787 | return false; | |
2788 | relend = rel + sec->reloc_count; | |
2789 | for (; rel < relend; rel++) | |
2790 | { | |
2791 | asection *rsec; | |
2792 | struct xcoff_link_hash_entry *h; | |
2793 | ||
2794 | if ((unsigned int) rel->r_symndx | |
2795 | > obj_raw_syment_count (sec->owner)) | |
2796 | continue; | |
2797 | ||
2798 | h = obj_xcoff_sym_hashes (sec->owner)[rel->r_symndx]; | |
2799 | if (h != NULL | |
2800 | && (h->flags & XCOFF_MARK) == 0) | |
2801 | { | |
2802 | if (! xcoff_mark_symbol (info, h)) | |
2803 | return false; | |
2804 | } | |
2805 | ||
2806 | rsec = xcoff_data (sec->owner)->csects[rel->r_symndx]; | |
2807 | if (rsec != NULL | |
2808 | && (rsec->flags & SEC_MARK) == 0) | |
2809 | { | |
2810 | if (! xcoff_mark (info, rsec)) | |
2811 | return false; | |
2812 | } | |
2813 | ||
2814 | /* See if this reloc needs to be copied into the .loader | |
2815 | section. */ | |
2816 | switch (rel->r_type) | |
2817 | { | |
2818 | default: | |
2819 | if (h == NULL | |
2820 | || h->root.type == bfd_link_hash_defined | |
2821 | || h->root.type == bfd_link_hash_defweak | |
2822 | || h->root.type == bfd_link_hash_common | |
2823 | || ((h->flags & XCOFF_CALLED) != 0 | |
2824 | && (h->root.type == bfd_link_hash_undefined | |
2825 | || h->root.type == bfd_link_hash_undefweak) | |
2826 | && h->root.root.string[0] == '.' | |
2827 | && h->descriptor != NULL | |
2828 | && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0 | |
2829 | || ((h->descriptor->flags & XCOFF_IMPORT) != 0 | |
2830 | && (h->descriptor->flags | |
2831 | & XCOFF_DEF_REGULAR) == 0)))) | |
2832 | break; | |
2833 | /* Fall through. */ | |
2834 | case R_POS: | |
2835 | case R_NEG: | |
2836 | case R_RL: | |
2837 | case R_RLA: | |
2838 | ++xcoff_hash_table (info)->ldrel_count; | |
2839 | if (h != NULL) | |
2840 | h->flags |= XCOFF_LDREL; | |
2841 | break; | |
2842 | case R_TOC: | |
2843 | case R_GL: | |
2844 | case R_TCL: | |
2845 | case R_TRL: | |
2846 | case R_TRLA: | |
2847 | /* We should never need a .loader reloc for a TOC | |
2848 | relative reloc. */ | |
2849 | break; | |
2850 | } | |
2851 | } | |
2852 | ||
2853 | if (! info->keep_memory | |
2854 | && coff_section_data (sec->owner, sec) != NULL | |
2855 | && coff_section_data (sec->owner, sec)->relocs != NULL | |
2856 | && ! coff_section_data (sec->owner, sec)->keep_relocs) | |
2857 | { | |
2858 | free (coff_section_data (sec->owner, sec)->relocs); | |
2859 | coff_section_data (sec->owner, sec)->relocs = NULL; | |
2860 | } | |
2861 | } | |
2862 | } | |
2863 | ||
2864 | return true; | |
2865 | } | |
2866 | ||
2867 | /* The sweep phase of garbage collection. Remove all garbage | |
2868 | sections. */ | |
2869 | ||
2870 | static void | |
2871 | xcoff_sweep (info) | |
2872 | struct bfd_link_info *info; | |
2873 | { | |
2874 | bfd *sub; | |
2875 | ||
2876 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
2877 | { | |
2878 | asection *o; | |
2879 | ||
2880 | for (o = sub->sections; o != NULL; o = o->next) | |
2881 | { | |
2882 | if ((o->flags & SEC_MARK) == 0) | |
2883 | { | |
2884 | /* Keep all sections from non-XCOFF input files. Keep | |
2885 | special sections. Keep .debug sections for the | |
2886 | moment. */ | |
2887 | if (sub->xvec != info->hash->creator | |
2888 | || o == xcoff_hash_table (info)->debug_section | |
2889 | || o == xcoff_hash_table (info)->loader_section | |
2890 | || o == xcoff_hash_table (info)->linkage_section | |
2891 | || o == xcoff_hash_table (info)->toc_section | |
2892 | || o == xcoff_hash_table (info)->descriptor_section | |
2893 | || strcmp (o->name, ".debug") == 0) | |
2894 | o->flags |= SEC_MARK; | |
2895 | else | |
2896 | { | |
2897 | o->_raw_size = 0; | |
2898 | o->reloc_count = 0; | |
2899 | o->lineno_count = 0; | |
2900 | } | |
2901 | } | |
2902 | } | |
2903 | } | |
2904 | } | |
2905 | ||
2906 | /* Record the number of elements in a set. This is used to output the | |
2907 | correct csect length. */ | |
2908 | ||
2909 | boolean | |
2910 | bfd_xcoff_link_record_set (output_bfd, info, harg, size) | |
2911 | bfd *output_bfd; | |
2912 | struct bfd_link_info *info; | |
2913 | struct bfd_link_hash_entry *harg; | |
2914 | bfd_size_type size; | |
2915 | { | |
2916 | struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; | |
2917 | struct xcoff_link_size_list *n; | |
2918 | ||
2919 | if (! XCOFF_XVECP (output_bfd->xvec)) | |
2920 | return true; | |
2921 | ||
2922 | /* This will hardly ever be called. I don't want to burn four bytes | |
2923 | per global symbol, so instead the size is kept on a linked list | |
2924 | attached to the hash table. */ | |
2925 | ||
2926 | n = ((struct xcoff_link_size_list *) | |
2927 | bfd_alloc (output_bfd, sizeof (struct xcoff_link_size_list))); | |
2928 | if (n == NULL) | |
2929 | return false; | |
2930 | n->next = xcoff_hash_table (info)->size_list; | |
2931 | n->h = h; | |
2932 | n->size = size; | |
2933 | xcoff_hash_table (info)->size_list = n; | |
2934 | ||
2935 | h->flags |= XCOFF_HAS_SIZE; | |
2936 | ||
2937 | return true; | |
2938 | } | |
2939 | ||
2940 | /* Import a symbol. */ | |
2941 | ||
2942 | boolean | |
2943 | bfd_xcoff_import_symbol (output_bfd, info, harg, val, imppath, impfile, | |
2944 | impmember) | |
2945 | bfd *output_bfd; | |
2946 | struct bfd_link_info *info; | |
2947 | struct bfd_link_hash_entry *harg; | |
2948 | bfd_vma val; | |
2949 | const char *imppath; | |
2950 | const char *impfile; | |
2951 | const char *impmember; | |
2952 | { | |
2953 | struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; | |
2954 | ||
2955 | if (! XCOFF_XVECP (output_bfd->xvec)) | |
2956 | return true; | |
2957 | ||
2958 | /* A symbol name which starts with a period is the code for a | |
2959 | function. If the symbol is undefined, then add an undefined | |
2960 | symbol for the function descriptor, and import that instead. */ | |
2961 | if (h->root.root.string[0] == '.' | |
2962 | && h->root.type == bfd_link_hash_undefined | |
2963 | && val == (bfd_vma) -1) | |
2964 | { | |
2965 | struct xcoff_link_hash_entry *hds; | |
2966 | ||
2967 | hds = h->descriptor; | |
2968 | if (hds == NULL) | |
2969 | { | |
2970 | hds = xcoff_link_hash_lookup (xcoff_hash_table (info), | |
2971 | h->root.root.string + 1, | |
2972 | true, false, true); | |
2973 | if (hds == NULL) | |
2974 | return false; | |
2975 | if (hds->root.type == bfd_link_hash_new) | |
2976 | { | |
2977 | hds->root.type = bfd_link_hash_undefined; | |
2978 | hds->root.u.undef.abfd = h->root.u.undef.abfd; | |
2979 | } | |
2980 | hds->flags |= XCOFF_DESCRIPTOR; | |
2981 | BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0 | |
2982 | && (h->flags & XCOFF_DESCRIPTOR) == 0); | |
2983 | hds->descriptor = h; | |
2984 | h->descriptor = hds; | |
2985 | } | |
2986 | ||
2987 | /* Now, if the descriptor is undefined, import the descriptor | |
2988 | rather than the symbol we were told to import. FIXME: Is | |
2989 | this correct in all cases? */ | |
2990 | if (hds->root.type == bfd_link_hash_undefined) | |
2991 | h = hds; | |
2992 | } | |
2993 | ||
2994 | h->flags |= XCOFF_IMPORT; | |
2995 | ||
2996 | if (val != (bfd_vma) -1) | |
2997 | { | |
2998 | if (h->root.type == bfd_link_hash_defined | |
2999 | && (! bfd_is_abs_section (h->root.u.def.section) | |
3000 | || h->root.u.def.value != val)) | |
3001 | { | |
3002 | if (! ((*info->callbacks->multiple_definition) | |
3003 | (info, h->root.root.string, h->root.u.def.section->owner, | |
3004 | h->root.u.def.section, h->root.u.def.value, | |
3005 | output_bfd, bfd_abs_section_ptr, val))) | |
3006 | return false; | |
3007 | } | |
3008 | ||
3009 | h->root.type = bfd_link_hash_defined; | |
3010 | h->root.u.def.section = bfd_abs_section_ptr; | |
3011 | h->root.u.def.value = val; | |
3012 | } | |
3013 | ||
3014 | /* We overload the ldindx field to hold the l_ifile value for this | |
3015 | symbol. */ | |
3016 | BFD_ASSERT (h->ldsym == NULL); | |
3017 | BFD_ASSERT ((h->flags & XCOFF_BUILT_LDSYM) == 0); | |
3018 | if (imppath == NULL) | |
3019 | h->ldindx = -1; | |
3020 | else | |
3021 | { | |
3022 | unsigned int c; | |
3023 | struct xcoff_import_file **pp; | |
3024 | ||
3025 | /* We start c at 1 because the first entry in the import list is | |
3026 | reserved for the library search path. */ | |
3027 | for (pp = &xcoff_hash_table (info)->imports, c = 1; | |
3028 | *pp != NULL; | |
3029 | pp = &(*pp)->next, ++c) | |
3030 | { | |
3031 | if (strcmp ((*pp)->path, imppath) == 0 | |
3032 | && strcmp ((*pp)->file, impfile) == 0 | |
3033 | && strcmp ((*pp)->member, impmember) == 0) | |
3034 | break; | |
3035 | } | |
3036 | ||
3037 | if (*pp == NULL) | |
3038 | { | |
3039 | struct xcoff_import_file *n; | |
3040 | ||
3041 | n = ((struct xcoff_import_file *) | |
3042 | bfd_alloc (output_bfd, sizeof (struct xcoff_import_file))); | |
3043 | if (n == NULL) | |
3044 | return false; | |
3045 | n->next = NULL; | |
3046 | n->path = imppath; | |
3047 | n->file = impfile; | |
3048 | n->member = impmember; | |
3049 | *pp = n; | |
3050 | } | |
3051 | ||
3052 | h->ldindx = c; | |
3053 | } | |
3054 | ||
3055 | return true; | |
3056 | } | |
3057 | ||
3058 | /* Export a symbol. */ | |
3059 | ||
3060 | boolean | |
3061 | bfd_xcoff_export_symbol (output_bfd, info, harg, syscall) | |
3062 | bfd *output_bfd; | |
3063 | struct bfd_link_info *info; | |
3064 | struct bfd_link_hash_entry *harg; | |
5f771d47 | 3065 | boolean syscall ATTRIBUTE_UNUSED; |
252b5132 RH |
3066 | { |
3067 | struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; | |
3068 | ||
3069 | if (! XCOFF_XVECP (output_bfd->xvec)) | |
3070 | return true; | |
3071 | ||
3072 | h->flags |= XCOFF_EXPORT; | |
3073 | ||
3074 | /* FIXME: I'm not at all sure what syscall is supposed to mean, so | |
3075 | I'm just going to ignore it until somebody explains it. */ | |
3076 | ||
3077 | /* See if this is a function descriptor. It may be one even though | |
3078 | it is not so marked. */ | |
3079 | if ((h->flags & XCOFF_DESCRIPTOR) == 0 | |
3080 | && h->root.root.string[0] != '.') | |
3081 | { | |
3082 | char *fnname; | |
3083 | struct xcoff_link_hash_entry *hfn; | |
3084 | ||
3085 | fnname = (char *) bfd_malloc (strlen (h->root.root.string) + 2); | |
3086 | if (fnname == NULL) | |
3087 | return false; | |
3088 | fnname[0] = '.'; | |
3089 | strcpy (fnname + 1, h->root.root.string); | |
3090 | hfn = xcoff_link_hash_lookup (xcoff_hash_table (info), | |
3091 | fnname, false, false, true); | |
3092 | free (fnname); | |
3093 | if (hfn != NULL | |
3094 | && hfn->smclas == XMC_PR | |
3095 | && (hfn->root.type == bfd_link_hash_defined | |
3096 | || hfn->root.type == bfd_link_hash_defweak)) | |
3097 | { | |
3098 | h->flags |= XCOFF_DESCRIPTOR; | |
3099 | h->descriptor = hfn; | |
3100 | hfn->descriptor = h; | |
3101 | } | |
3102 | } | |
3103 | ||
3104 | /* Make sure we don't garbage collect this symbol. */ | |
3105 | if (! xcoff_mark_symbol (info, h)) | |
3106 | return false; | |
3107 | ||
3108 | /* If this is a function descriptor, make sure we don't garbage | |
3109 | collect the associated function code. We normally don't have to | |
3110 | worry about this, because the descriptor will be attached to a | |
3111 | section with relocs, but if we are creating the descriptor | |
3112 | ourselves those relocs will not be visible to the mark code. */ | |
3113 | if ((h->flags & XCOFF_DESCRIPTOR) != 0) | |
3114 | { | |
3115 | if (! xcoff_mark_symbol (info, h->descriptor)) | |
3116 | return false; | |
3117 | } | |
3118 | ||
3119 | return true; | |
3120 | } | |
3121 | ||
3122 | /* Count a reloc against a symbol. This is called for relocs | |
3123 | generated by the linker script, typically for global constructors | |
3124 | and destructors. */ | |
3125 | ||
3126 | boolean | |
3127 | bfd_xcoff_link_count_reloc (output_bfd, info, name) | |
3128 | bfd *output_bfd; | |
3129 | struct bfd_link_info *info; | |
3130 | const char *name; | |
3131 | { | |
3132 | struct xcoff_link_hash_entry *h; | |
3133 | ||
3134 | if (! XCOFF_XVECP (output_bfd->xvec)) | |
3135 | return true; | |
3136 | ||
3137 | h = ((struct xcoff_link_hash_entry *) | |
3138 | bfd_wrapped_link_hash_lookup (output_bfd, info, name, false, false, | |
3139 | false)); | |
3140 | if (h == NULL) | |
3141 | { | |
3142 | (*_bfd_error_handler) (_("%s: no such symbol"), name); | |
3143 | bfd_set_error (bfd_error_no_symbols); | |
3144 | return false; | |
3145 | } | |
3146 | ||
3147 | h->flags |= XCOFF_REF_REGULAR | XCOFF_LDREL; | |
3148 | ++xcoff_hash_table (info)->ldrel_count; | |
3149 | ||
3150 | /* Mark the symbol to avoid garbage collection. */ | |
3151 | if (! xcoff_mark_symbol (info, h)) | |
3152 | return false; | |
3153 | ||
3154 | return true; | |
3155 | } | |
3156 | ||
3157 | /* This function is called for each symbol to which the linker script | |
3158 | assigns a value. */ | |
3159 | ||
3160 | boolean | |
3161 | bfd_xcoff_record_link_assignment (output_bfd, info, name) | |
3162 | bfd *output_bfd; | |
3163 | struct bfd_link_info *info; | |
3164 | const char *name; | |
3165 | { | |
3166 | struct xcoff_link_hash_entry *h; | |
3167 | ||
3168 | if (! XCOFF_XVECP (output_bfd->xvec)) | |
3169 | return true; | |
3170 | ||
3171 | h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true, true, | |
3172 | false); | |
3173 | if (h == NULL) | |
3174 | return false; | |
3175 | ||
3176 | h->flags |= XCOFF_DEF_REGULAR; | |
3177 | ||
3178 | return true; | |
3179 | } | |
3180 | ||
3181 | /* This structure is used to pass information through | |
3182 | xcoff_link_hash_traverse. */ | |
3183 | ||
3184 | struct xcoff_loader_info | |
3185 | { | |
3186 | /* Set if a problem occurred. */ | |
3187 | boolean failed; | |
3188 | /* Output BFD. */ | |
3189 | bfd *output_bfd; | |
3190 | /* Link information structure. */ | |
3191 | struct bfd_link_info *info; | |
3192 | /* Whether all defined symbols should be exported. */ | |
3193 | boolean export_defineds; | |
3194 | /* Number of ldsym structures. */ | |
3195 | size_t ldsym_count; | |
3196 | /* Size of string table. */ | |
3197 | size_t string_size; | |
3198 | /* String table. */ | |
3199 | bfd_byte *strings; | |
3200 | /* Allocated size of string table. */ | |
3201 | size_t string_alc; | |
3202 | }; | |
3203 | ||
3204 | /* Build the .loader section. This is called by the XCOFF linker | |
3205 | emulation before_allocation routine. We must set the size of the | |
3206 | .loader section before the linker lays out the output file. | |
3207 | LIBPATH is the library path to search for shared objects; this is | |
3208 | normally built from the -L arguments passed to the linker. ENTRY | |
3209 | is the name of the entry point symbol (the -e linker option). | |
3210 | FILE_ALIGN is the alignment to use for sections within the file | |
3211 | (the -H linker option). MAXSTACK is the maximum stack size (the | |
3212 | -bmaxstack linker option). MAXDATA is the maximum data size (the | |
3213 | -bmaxdata linker option). GC is whether to do garbage collection | |
3214 | (the -bgc linker option). MODTYPE is the module type (the | |
3215 | -bmodtype linker option). TEXTRO is whether the text section must | |
3216 | be read only (the -btextro linker option). EXPORT_DEFINEDS is | |
3217 | whether all defined symbols should be exported (the -unix linker | |
3218 | option). SPECIAL_SECTIONS is set by this routine to csects with | |
3219 | magic names like _end. */ | |
3220 | ||
3221 | boolean | |
3222 | bfd_xcoff_size_dynamic_sections (output_bfd, info, libpath, entry, | |
3223 | file_align, maxstack, maxdata, gc, | |
3224 | modtype, textro, export_defineds, | |
3225 | special_sections) | |
3226 | bfd *output_bfd; | |
3227 | struct bfd_link_info *info; | |
3228 | const char *libpath; | |
3229 | const char *entry; | |
3230 | unsigned long file_align; | |
3231 | unsigned long maxstack; | |
3232 | unsigned long maxdata; | |
3233 | boolean gc; | |
3234 | int modtype; | |
3235 | boolean textro; | |
3236 | boolean export_defineds; | |
3237 | asection **special_sections; | |
3238 | { | |
3239 | struct xcoff_link_hash_entry *hentry; | |
3240 | asection *lsec; | |
3241 | struct xcoff_loader_info ldinfo; | |
3242 | int i; | |
3243 | size_t impsize, impcount; | |
3244 | struct xcoff_import_file *fl; | |
3245 | struct internal_ldhdr *ldhdr; | |
3246 | bfd_size_type stoff; | |
3247 | register char *out; | |
3248 | asection *sec; | |
3249 | bfd *sub; | |
3250 | struct bfd_strtab_hash *debug_strtab; | |
3251 | bfd_byte *debug_contents = NULL; | |
3252 | ||
3253 | if (! XCOFF_XVECP (output_bfd->xvec)) | |
3254 | { | |
3255 | for (i = 0; i < 6; i++) | |
3256 | special_sections[i] = NULL; | |
3257 | return true; | |
3258 | } | |
3259 | ||
3260 | ldinfo.failed = false; | |
3261 | ldinfo.output_bfd = output_bfd; | |
3262 | ldinfo.info = info; | |
3263 | ldinfo.export_defineds = export_defineds; | |
3264 | ldinfo.ldsym_count = 0; | |
3265 | ldinfo.string_size = 0; | |
3266 | ldinfo.strings = NULL; | |
3267 | ldinfo.string_alc = 0; | |
3268 | ||
3269 | xcoff_data (output_bfd)->maxstack = maxstack; | |
3270 | xcoff_data (output_bfd)->maxdata = maxdata; | |
3271 | xcoff_data (output_bfd)->modtype = modtype; | |
3272 | ||
3273 | xcoff_hash_table (info)->file_align = file_align; | |
3274 | xcoff_hash_table (info)->textro = textro; | |
3275 | ||
cdb72c32 ILT |
3276 | if (entry == NULL) |
3277 | hentry = NULL; | |
3278 | else | |
3279 | { | |
3280 | hentry = xcoff_link_hash_lookup (xcoff_hash_table (info), entry, | |
3281 | false, false, true); | |
3282 | if (hentry != NULL) | |
3283 | hentry->flags |= XCOFF_ENTRY; | |
3284 | } | |
252b5132 RH |
3285 | |
3286 | /* Garbage collect unused sections. */ | |
3287 | if (info->relocateable | |
3288 | || ! gc | |
3289 | || hentry == NULL | |
3290 | || (hentry->root.type != bfd_link_hash_defined | |
3291 | && hentry->root.type != bfd_link_hash_defweak)) | |
3292 | { | |
3293 | gc = false; | |
3294 | xcoff_hash_table (info)->gc = false; | |
3295 | ||
3296 | /* We still need to call xcoff_mark, in order to set ldrel_count | |
3297 | correctly. */ | |
3298 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
3299 | { | |
3300 | asection *o; | |
3301 | ||
3302 | for (o = sub->sections; o != NULL; o = o->next) | |
3303 | { | |
3304 | if ((o->flags & SEC_MARK) == 0) | |
3305 | { | |
3306 | if (! xcoff_mark (info, o)) | |
3307 | goto error_return; | |
3308 | } | |
3309 | } | |
3310 | } | |
3311 | } | |
3312 | else | |
3313 | { | |
3314 | if (! xcoff_mark (info, hentry->root.u.def.section)) | |
3315 | goto error_return; | |
3316 | xcoff_sweep (info); | |
3317 | xcoff_hash_table (info)->gc = true; | |
3318 | } | |
3319 | ||
3320 | /* Return special sections to the caller. */ | |
3321 | for (i = 0; i < 6; i++) | |
3322 | { | |
3323 | asection *sec; | |
3324 | ||
3325 | sec = xcoff_hash_table (info)->special_sections[i]; | |
3326 | if (sec != NULL | |
3327 | && gc | |
3328 | && (sec->flags & SEC_MARK) == 0) | |
3329 | sec = NULL; | |
3330 | special_sections[i] = sec; | |
3331 | } | |
3332 | ||
3333 | if (info->input_bfds == NULL) | |
3334 | { | |
3335 | /* I'm not sure what to do in this bizarre case. */ | |
3336 | return true; | |
3337 | } | |
3338 | ||
3339 | xcoff_link_hash_traverse (xcoff_hash_table (info), xcoff_build_ldsyms, | |
3340 | (PTR) &ldinfo); | |
3341 | if (ldinfo.failed) | |
3342 | goto error_return; | |
3343 | ||
3344 | /* Work out the size of the import file names. Each import file ID | |
3345 | consists of three null terminated strings: the path, the file | |
3346 | name, and the archive member name. The first entry in the list | |
3347 | of names is the path to use to find objects, which the linker has | |
3348 | passed in as the libpath argument. For some reason, the path | |
3349 | entry in the other import file names appears to always be empty. */ | |
3350 | impsize = strlen (libpath) + 3; | |
3351 | impcount = 1; | |
3352 | for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next) | |
3353 | { | |
3354 | ++impcount; | |
3355 | impsize += (strlen (fl->path) | |
3356 | + strlen (fl->file) | |
3357 | + strlen (fl->member) | |
3358 | + 3); | |
3359 | } | |
3360 | ||
3361 | /* Set up the .loader section header. */ | |
3362 | ldhdr = &xcoff_hash_table (info)->ldhdr; | |
3363 | ldhdr->l_version = 1; | |
3364 | ldhdr->l_nsyms = ldinfo.ldsym_count; | |
3365 | ldhdr->l_nreloc = xcoff_hash_table (info)->ldrel_count; | |
3366 | ldhdr->l_istlen = impsize; | |
3367 | ldhdr->l_nimpid = impcount; | |
3368 | ldhdr->l_impoff = (LDHDRSZ | |
3369 | + ldhdr->l_nsyms * LDSYMSZ | |
3370 | + ldhdr->l_nreloc * LDRELSZ); | |
3371 | ldhdr->l_stlen = ldinfo.string_size; | |
3372 | stoff = ldhdr->l_impoff + impsize; | |
3373 | if (ldinfo.string_size == 0) | |
3374 | ldhdr->l_stoff = 0; | |
3375 | else | |
3376 | ldhdr->l_stoff = stoff; | |
3377 | ||
3378 | /* We now know the final size of the .loader section. Allocate | |
3379 | space for it. */ | |
3380 | lsec = xcoff_hash_table (info)->loader_section; | |
3381 | lsec->_raw_size = stoff + ldhdr->l_stlen; | |
3382 | lsec->contents = (bfd_byte *) bfd_zalloc (output_bfd, lsec->_raw_size); | |
3383 | if (lsec->contents == NULL) | |
3384 | goto error_return; | |
3385 | ||
3386 | /* Set up the header. */ | |
3387 | xcoff_swap_ldhdr_out (output_bfd, ldhdr, | |
3388 | (struct external_ldhdr *) lsec->contents); | |
3389 | ||
3390 | /* Set up the import file names. */ | |
3391 | out = (char *) lsec->contents + ldhdr->l_impoff; | |
3392 | strcpy (out, libpath); | |
3393 | out += strlen (libpath) + 1; | |
3394 | *out++ = '\0'; | |
3395 | *out++ = '\0'; | |
3396 | for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next) | |
3397 | { | |
3398 | register const char *s; | |
3399 | ||
3400 | s = fl->path; | |
3401 | while ((*out++ = *s++) != '\0') | |
3402 | ; | |
3403 | s = fl->file; | |
3404 | while ((*out++ = *s++) != '\0') | |
3405 | ; | |
3406 | s = fl->member; | |
3407 | while ((*out++ = *s++) != '\0') | |
3408 | ; | |
3409 | } | |
3410 | ||
3411 | BFD_ASSERT ((bfd_size_type) ((bfd_byte *) out - lsec->contents) == stoff); | |
3412 | ||
3413 | /* Set up the symbol string table. */ | |
3414 | if (ldinfo.string_size > 0) | |
3415 | { | |
3416 | memcpy (out, ldinfo.strings, ldinfo.string_size); | |
3417 | free (ldinfo.strings); | |
3418 | ldinfo.strings = NULL; | |
3419 | } | |
3420 | ||
3421 | /* We can't set up the symbol table or the relocs yet, because we | |
3422 | don't yet know the final position of the various sections. The | |
3423 | .loader symbols are written out when the corresponding normal | |
3424 | symbols are written out in xcoff_link_input_bfd or | |
3425 | xcoff_write_global_symbol. The .loader relocs are written out | |
3426 | when the corresponding normal relocs are handled in | |
3427 | xcoff_link_input_bfd. */ | |
3428 | ||
3429 | /* Allocate space for the magic sections. */ | |
3430 | sec = xcoff_hash_table (info)->linkage_section; | |
3431 | if (sec->_raw_size > 0) | |
3432 | { | |
3433 | sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size); | |
3434 | if (sec->contents == NULL) | |
3435 | goto error_return; | |
3436 | } | |
3437 | sec = xcoff_hash_table (info)->toc_section; | |
3438 | if (sec->_raw_size > 0) | |
3439 | { | |
3440 | sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size); | |
3441 | if (sec->contents == NULL) | |
3442 | goto error_return; | |
3443 | } | |
3444 | sec = xcoff_hash_table (info)->descriptor_section; | |
3445 | if (sec->_raw_size > 0) | |
3446 | { | |
3447 | sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size); | |
3448 | if (sec->contents == NULL) | |
3449 | goto error_return; | |
3450 | } | |
3451 | ||
3452 | /* Now that we've done garbage collection, figure out the contents | |
3453 | of the .debug section. */ | |
3454 | debug_strtab = xcoff_hash_table (info)->debug_strtab; | |
3455 | ||
3456 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
3457 | { | |
3458 | asection *subdeb; | |
3459 | bfd_size_type symcount; | |
3460 | unsigned long *debug_index; | |
3461 | asection **csectpp; | |
3462 | bfd_byte *esym, *esymend; | |
3463 | bfd_size_type symesz; | |
3464 | ||
3465 | if (sub->xvec != info->hash->creator) | |
3466 | continue; | |
3467 | subdeb = bfd_get_section_by_name (sub, ".debug"); | |
3468 | if (subdeb == NULL || subdeb->_raw_size == 0) | |
3469 | continue; | |
3470 | ||
3471 | if (info->strip == strip_all | |
3472 | || info->strip == strip_debugger | |
3473 | || info->discard == discard_all) | |
3474 | { | |
3475 | subdeb->_raw_size = 0; | |
3476 | continue; | |
3477 | } | |
3478 | ||
3479 | if (! _bfd_coff_get_external_symbols (sub)) | |
3480 | goto error_return; | |
3481 | ||
3482 | symcount = obj_raw_syment_count (sub); | |
3483 | debug_index = ((unsigned long *) | |
3484 | bfd_zalloc (sub, symcount * sizeof (unsigned long))); | |
3485 | if (debug_index == NULL) | |
3486 | goto error_return; | |
3487 | xcoff_data (sub)->debug_indices = debug_index; | |
3488 | ||
3489 | /* Grab the contents of the .debug section. We use malloc and | |
3490 | copy the names into the debug stringtab, rather than | |
3491 | bfd_alloc, because I expect that, when linking many files | |
3492 | together, many of the strings will be the same. Storing the | |
3493 | strings in the hash table should save space in this case. */ | |
3494 | debug_contents = (bfd_byte *) bfd_malloc (subdeb->_raw_size); | |
3495 | if (debug_contents == NULL) | |
3496 | goto error_return; | |
3497 | if (! bfd_get_section_contents (sub, subdeb, (PTR) debug_contents, | |
3498 | (file_ptr) 0, subdeb->_raw_size)) | |
3499 | goto error_return; | |
3500 | ||
3501 | csectpp = xcoff_data (sub)->csects; | |
3502 | ||
3503 | symesz = bfd_coff_symesz (sub); | |
3504 | esym = (bfd_byte *) obj_coff_external_syms (sub); | |
3505 | esymend = esym + symcount * symesz; | |
3506 | while (esym < esymend) | |
3507 | { | |
3508 | struct internal_syment sym; | |
3509 | ||
3510 | bfd_coff_swap_sym_in (sub, (PTR) esym, (PTR) &sym); | |
3511 | ||
3512 | *debug_index = (unsigned long) -1; | |
3513 | ||
3514 | if (sym._n._n_n._n_zeroes == 0 | |
3515 | && *csectpp != NULL | |
3516 | && (! gc | |
3517 | || ((*csectpp)->flags & SEC_MARK) != 0 | |
3518 | || *csectpp == bfd_abs_section_ptr) | |
3519 | && bfd_coff_symname_in_debug (sub, &sym)) | |
3520 | { | |
3521 | char *name; | |
3522 | bfd_size_type indx; | |
3523 | ||
3524 | name = (char *) debug_contents + sym._n._n_n._n_offset; | |
3525 | indx = _bfd_stringtab_add (debug_strtab, name, true, true); | |
3526 | if (indx == (bfd_size_type) -1) | |
3527 | goto error_return; | |
3528 | *debug_index = indx; | |
3529 | } | |
3530 | ||
3531 | esym += (sym.n_numaux + 1) * symesz; | |
3532 | csectpp += sym.n_numaux + 1; | |
3533 | debug_index += sym.n_numaux + 1; | |
3534 | } | |
3535 | ||
3536 | free (debug_contents); | |
3537 | debug_contents = NULL; | |
3538 | ||
3539 | /* Clear the size of subdeb, so that it is not included directly | |
3540 | in the output file. */ | |
3541 | subdeb->_raw_size = 0; | |
3542 | ||
3543 | if (! info->keep_memory) | |
3544 | { | |
3545 | if (! _bfd_coff_free_symbols (sub)) | |
3546 | goto error_return; | |
3547 | } | |
3548 | } | |
3549 | ||
3550 | if (info->strip != strip_all) | |
3551 | xcoff_hash_table (info)->debug_section->_raw_size = | |
3552 | _bfd_stringtab_size (debug_strtab); | |
3553 | ||
3554 | return true; | |
3555 | ||
3556 | error_return: | |
3557 | if (ldinfo.strings != NULL) | |
3558 | free (ldinfo.strings); | |
3559 | if (debug_contents != NULL) | |
3560 | free (debug_contents); | |
3561 | return false; | |
3562 | } | |
3563 | ||
3564 | /* Add a symbol to the .loader symbols, if necessary. */ | |
3565 | ||
3566 | static boolean | |
3567 | xcoff_build_ldsyms (h, p) | |
3568 | struct xcoff_link_hash_entry *h; | |
3569 | PTR p; | |
3570 | { | |
3571 | struct xcoff_loader_info *ldinfo = (struct xcoff_loader_info *) p; | |
3572 | size_t len; | |
3573 | ||
3574 | /* If this is a final link, and the symbol was defined as a common | |
3575 | symbol in a regular object file, and there was no definition in | |
3576 | any dynamic object, then the linker will have allocated space for | |
3577 | the symbol in a common section but the XCOFF_DEF_REGULAR flag | |
3578 | will not have been set. */ | |
3579 | if (h->root.type == bfd_link_hash_defined | |
3580 | && (h->flags & XCOFF_DEF_REGULAR) == 0 | |
3581 | && (h->flags & XCOFF_REF_REGULAR) != 0 | |
3582 | && (h->flags & XCOFF_DEF_DYNAMIC) == 0 | |
3583 | && (bfd_is_abs_section (h->root.u.def.section) | |
3584 | || (h->root.u.def.section->owner->flags & DYNAMIC) == 0)) | |
3585 | h->flags |= XCOFF_DEF_REGULAR; | |
3586 | ||
3587 | /* If all defined symbols should be exported, mark them now. We | |
3588 | don't want to export the actual functions, just the function | |
3589 | descriptors. */ | |
3590 | if (ldinfo->export_defineds | |
3591 | && (h->flags & XCOFF_DEF_REGULAR) != 0 | |
3592 | && h->root.root.string[0] != '.') | |
3593 | { | |
3594 | boolean export; | |
3595 | ||
3596 | /* We don't export a symbol which is being defined by an object | |
3597 | included from an archive which contains a shared object. The | |
3598 | rationale is that if an archive contains both an unshared and | |
3599 | a shared object, then there must be some reason that the | |
3600 | unshared object is unshared, and we don't want to start | |
3601 | providing a shared version of it. In particular, this solves | |
3602 | a bug involving the _savefNN set of functions. gcc will call | |
3603 | those functions without providing a slot to restore the TOC, | |
3604 | so it is essential that these functions be linked in directly | |
3605 | and not from a shared object, which means that a shared | |
3606 | object which also happens to link them in must not export | |
3607 | them. This is confusing, but I haven't been able to think of | |
3608 | a different approach. Note that the symbols can, of course, | |
3609 | be exported explicitly. */ | |
3610 | export = true; | |
3611 | if ((h->root.type == bfd_link_hash_defined | |
3612 | || h->root.type == bfd_link_hash_defweak) | |
3613 | && h->root.u.def.section->owner != NULL | |
3614 | && h->root.u.def.section->owner->my_archive != NULL) | |
3615 | { | |
3616 | bfd *arbfd, *member; | |
3617 | ||
3618 | arbfd = h->root.u.def.section->owner->my_archive; | |
3619 | member = bfd_openr_next_archived_file (arbfd, (bfd *) NULL); | |
3620 | while (member != NULL) | |
3621 | { | |
3622 | if ((member->flags & DYNAMIC) != 0) | |
3623 | { | |
3624 | export = false; | |
3625 | break; | |
3626 | } | |
3627 | member = bfd_openr_next_archived_file (arbfd, member); | |
3628 | } | |
3629 | } | |
3630 | ||
3631 | if (export) | |
3632 | h->flags |= XCOFF_EXPORT; | |
3633 | } | |
3634 | ||
3635 | /* We don't want to garbage collect symbols which are not defined in | |
3636 | XCOFF files. This is a convenient place to mark them. */ | |
3637 | if (xcoff_hash_table (ldinfo->info)->gc | |
3638 | && (h->flags & XCOFF_MARK) == 0 | |
3639 | && (h->root.type == bfd_link_hash_defined | |
3640 | || h->root.type == bfd_link_hash_defweak) | |
3641 | && (h->root.u.def.section->owner == NULL | |
3642 | || (h->root.u.def.section->owner->xvec | |
3643 | != ldinfo->info->hash->creator))) | |
3644 | h->flags |= XCOFF_MARK; | |
3645 | ||
3646 | /* If this symbol is called and defined in a dynamic object, or it | |
3647 | is imported, then we need to set up global linkage code for it. | |
3648 | (Unless we did garbage collection and we didn't need this | |
3649 | symbol.) */ | |
3650 | if ((h->flags & XCOFF_CALLED) != 0 | |
3651 | && (h->root.type == bfd_link_hash_undefined | |
3652 | || h->root.type == bfd_link_hash_undefweak) | |
3653 | && h->root.root.string[0] == '.' | |
3654 | && h->descriptor != NULL | |
3655 | && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0 | |
3656 | || ((h->descriptor->flags & XCOFF_IMPORT) != 0 | |
3657 | && (h->descriptor->flags & XCOFF_DEF_REGULAR) == 0)) | |
3658 | && (! xcoff_hash_table (ldinfo->info)->gc | |
3659 | || (h->flags & XCOFF_MARK) != 0)) | |
3660 | { | |
3661 | asection *sec; | |
3662 | struct xcoff_link_hash_entry *hds; | |
3663 | ||
3664 | sec = xcoff_hash_table (ldinfo->info)->linkage_section; | |
3665 | h->root.type = bfd_link_hash_defined; | |
3666 | h->root.u.def.section = sec; | |
3667 | h->root.u.def.value = sec->_raw_size; | |
3668 | h->smclas = XMC_GL; | |
3669 | h->flags |= XCOFF_DEF_REGULAR; | |
3670 | sec->_raw_size += XCOFF_GLINK_SIZE; | |
3671 | ||
3672 | /* The global linkage code requires a TOC entry for the | |
3673 | descriptor. */ | |
3674 | hds = h->descriptor; | |
3675 | BFD_ASSERT ((hds->root.type == bfd_link_hash_undefined | |
3676 | || hds->root.type == bfd_link_hash_undefweak) | |
3677 | && (hds->flags & XCOFF_DEF_REGULAR) == 0); | |
3678 | hds->flags |= XCOFF_MARK; | |
3679 | if (hds->toc_section == NULL) | |
3680 | { | |
3681 | hds->toc_section = xcoff_hash_table (ldinfo->info)->toc_section; | |
3682 | hds->u.toc_offset = hds->toc_section->_raw_size; | |
3683 | hds->toc_section->_raw_size += 4; | |
3684 | ++xcoff_hash_table (ldinfo->info)->ldrel_count; | |
3685 | ++hds->toc_section->reloc_count; | |
3686 | hds->indx = -2; | |
3687 | hds->flags |= XCOFF_SET_TOC | XCOFF_LDREL; | |
3688 | ||
3689 | /* We need to call xcoff_build_ldsyms recursively here, | |
3690 | because we may already have passed hds on the traversal. */ | |
3691 | xcoff_build_ldsyms (hds, p); | |
3692 | } | |
3693 | } | |
3694 | ||
3695 | /* If this symbol is exported, but not defined, we need to try to | |
3696 | define it. */ | |
3697 | if ((h->flags & XCOFF_EXPORT) != 0 | |
3698 | && (h->flags & XCOFF_IMPORT) == 0 | |
3699 | && (h->flags & XCOFF_DEF_REGULAR) == 0 | |
3700 | && (h->flags & XCOFF_DEF_DYNAMIC) == 0 | |
3701 | && (h->root.type == bfd_link_hash_undefined | |
3702 | || h->root.type == bfd_link_hash_undefweak)) | |
3703 | { | |
3704 | if ((h->flags & XCOFF_DESCRIPTOR) != 0 | |
3705 | && (h->descriptor->root.type == bfd_link_hash_defined | |
3706 | || h->descriptor->root.type == bfd_link_hash_defweak)) | |
3707 | { | |
3708 | asection *sec; | |
3709 | ||
3710 | /* This is an undefined function descriptor associated with | |
3711 | a defined entry point. We can build up a function | |
3712 | descriptor ourselves. Believe it or not, the AIX linker | |
3713 | actually does this, and there are cases where we need to | |
3714 | do it as well. */ | |
3715 | sec = xcoff_hash_table (ldinfo->info)->descriptor_section; | |
3716 | h->root.type = bfd_link_hash_defined; | |
3717 | h->root.u.def.section = sec; | |
3718 | h->root.u.def.value = sec->_raw_size; | |
3719 | h->smclas = XMC_DS; | |
3720 | h->flags |= XCOFF_DEF_REGULAR; | |
3721 | sec->_raw_size += 12; | |
3722 | ||
3723 | /* A function descriptor uses two relocs: one for the | |
3724 | associated code, and one for the TOC address. */ | |
3725 | xcoff_hash_table (ldinfo->info)->ldrel_count += 2; | |
3726 | sec->reloc_count += 2; | |
3727 | ||
3728 | /* We handle writing out the contents of the descriptor in | |
3729 | xcoff_write_global_symbol. */ | |
3730 | } | |
3731 | else | |
3732 | { | |
3733 | (*_bfd_error_handler) | |
3734 | (_("warning: attempt to export undefined symbol `%s'"), | |
3735 | h->root.root.string); | |
3736 | h->ldsym = NULL; | |
3737 | return true; | |
3738 | } | |
3739 | } | |
3740 | ||
3741 | /* If this is still a common symbol, and it wasn't garbage | |
3742 | collected, we need to actually allocate space for it in the .bss | |
3743 | section. */ | |
3744 | if (h->root.type == bfd_link_hash_common | |
3745 | && (! xcoff_hash_table (ldinfo->info)->gc | |
3746 | || (h->flags & XCOFF_MARK) != 0) | |
3747 | && h->root.u.c.p->section->_raw_size == 0) | |
3748 | { | |
3749 | BFD_ASSERT (bfd_is_com_section (h->root.u.c.p->section)); | |
3750 | h->root.u.c.p->section->_raw_size = h->root.u.c.size; | |
3751 | } | |
3752 | ||
3753 | /* We need to add a symbol to the .loader section if it is mentioned | |
3754 | in a reloc which we are copying to the .loader section and it was | |
3755 | not defined or common, or if it is the entry point, or if it is | |
3756 | being exported. */ | |
3757 | ||
3758 | if (((h->flags & XCOFF_LDREL) == 0 | |
3759 | || h->root.type == bfd_link_hash_defined | |
3760 | || h->root.type == bfd_link_hash_defweak | |
3761 | || h->root.type == bfd_link_hash_common) | |
3762 | && (h->flags & XCOFF_ENTRY) == 0 | |
3763 | && (h->flags & XCOFF_EXPORT) == 0) | |
3764 | { | |
3765 | h->ldsym = NULL; | |
3766 | return true; | |
3767 | } | |
3768 | ||
3769 | /* We don't need to add this symbol if we did garbage collection and | |
3770 | we did not mark this symbol. */ | |
3771 | if (xcoff_hash_table (ldinfo->info)->gc | |
3772 | && (h->flags & XCOFF_MARK) == 0) | |
3773 | { | |
3774 | h->ldsym = NULL; | |
3775 | return true; | |
3776 | } | |
3777 | ||
3778 | /* We may have already processed this symbol due to the recursive | |
3779 | call above. */ | |
3780 | if ((h->flags & XCOFF_BUILT_LDSYM) != 0) | |
3781 | return true; | |
3782 | ||
3783 | /* We need to add this symbol to the .loader symbols. */ | |
3784 | ||
3785 | BFD_ASSERT (h->ldsym == NULL); | |
3786 | h->ldsym = ((struct internal_ldsym *) | |
3787 | bfd_zalloc (ldinfo->output_bfd, | |
3788 | sizeof (struct internal_ldsym))); | |
3789 | if (h->ldsym == NULL) | |
3790 | { | |
3791 | ldinfo->failed = true; | |
3792 | return false; | |
3793 | } | |
3794 | ||
3795 | if ((h->flags & XCOFF_IMPORT) != 0) | |
3796 | h->ldsym->l_ifile = h->ldindx; | |
3797 | ||
3798 | /* The first 3 symbol table indices are reserved to indicate the | |
3799 | sections. */ | |
3800 | h->ldindx = ldinfo->ldsym_count + 3; | |
3801 | ||
3802 | ++ldinfo->ldsym_count; | |
3803 | ||
3804 | len = strlen (h->root.root.string); | |
3805 | if (len <= SYMNMLEN) | |
3806 | strncpy (h->ldsym->_l._l_name, h->root.root.string, SYMNMLEN); | |
3807 | else | |
3808 | { | |
3809 | if (ldinfo->string_size + len + 3 > ldinfo->string_alc) | |
3810 | { | |
3811 | size_t newalc; | |
3812 | bfd_byte *newstrings; | |
3813 | ||
3814 | newalc = ldinfo->string_alc * 2; | |
3815 | if (newalc == 0) | |
3816 | newalc = 32; | |
3817 | while (ldinfo->string_size + len + 3 > newalc) | |
3818 | newalc *= 2; | |
3819 | ||
3820 | newstrings = ((bfd_byte *) | |
3821 | bfd_realloc ((PTR) ldinfo->strings, newalc)); | |
3822 | if (newstrings == NULL) | |
3823 | { | |
3824 | ldinfo->failed = true; | |
3825 | return false; | |
3826 | } | |
3827 | ldinfo->string_alc = newalc; | |
3828 | ldinfo->strings = newstrings; | |
3829 | } | |
3830 | ||
3831 | bfd_put_16 (ldinfo->output_bfd, len + 1, | |
3832 | ldinfo->strings + ldinfo->string_size); | |
3833 | strcpy (ldinfo->strings + ldinfo->string_size + 2, h->root.root.string); | |
3834 | h->ldsym->_l._l_l._l_zeroes = 0; | |
3835 | h->ldsym->_l._l_l._l_offset = ldinfo->string_size + 2; | |
3836 | ldinfo->string_size += len + 3; | |
3837 | } | |
3838 | ||
3839 | h->flags |= XCOFF_BUILT_LDSYM; | |
3840 | ||
3841 | return true; | |
3842 | } | |
3843 | \f | |
3844 | /* Do the final link step. */ | |
3845 | ||
3846 | boolean | |
3847 | _bfd_xcoff_bfd_final_link (abfd, info) | |
3848 | bfd *abfd; | |
3849 | struct bfd_link_info *info; | |
3850 | { | |
3851 | bfd_size_type symesz; | |
3852 | struct xcoff_final_link_info finfo; | |
3853 | asection *o; | |
3854 | struct bfd_link_order *p; | |
3855 | size_t max_contents_size; | |
3856 | size_t max_sym_count; | |
3857 | size_t max_lineno_count; | |
3858 | size_t max_reloc_count; | |
3859 | size_t max_output_reloc_count; | |
3860 | file_ptr rel_filepos; | |
3861 | unsigned int relsz; | |
3862 | file_ptr line_filepos; | |
3863 | unsigned int linesz; | |
3864 | bfd *sub; | |
3865 | bfd_byte *external_relocs = NULL; | |
3866 | char strbuf[STRING_SIZE_SIZE]; | |
3867 | ||
3868 | if (info->shared) | |
3869 | abfd->flags |= DYNAMIC; | |
3870 | ||
3871 | symesz = bfd_coff_symesz (abfd); | |
3872 | ||
3873 | finfo.info = info; | |
3874 | finfo.output_bfd = abfd; | |
3875 | finfo.strtab = NULL; | |
3876 | finfo.section_info = NULL; | |
3877 | finfo.last_file_index = -1; | |
3878 | finfo.toc_symindx = -1; | |
3879 | finfo.internal_syms = NULL; | |
3880 | finfo.sym_indices = NULL; | |
3881 | finfo.outsyms = NULL; | |
3882 | finfo.linenos = NULL; | |
3883 | finfo.contents = NULL; | |
3884 | finfo.external_relocs = NULL; | |
3885 | ||
3886 | finfo.ldsym = ((struct external_ldsym *) | |
3887 | (xcoff_hash_table (info)->loader_section->contents | |
3888 | + LDHDRSZ)); | |
3889 | finfo.ldrel = ((struct external_ldrel *) | |
3890 | (xcoff_hash_table (info)->loader_section->contents | |
3891 | + LDHDRSZ | |
3892 | + xcoff_hash_table (info)->ldhdr.l_nsyms * LDSYMSZ)); | |
3893 | ||
3894 | xcoff_data (abfd)->coff.link_info = info; | |
3895 | ||
3896 | finfo.strtab = _bfd_stringtab_init (); | |
3897 | if (finfo.strtab == NULL) | |
3898 | goto error_return; | |
3899 | ||
3900 | /* Count the line number and relocation entries required for the | |
3901 | output file. Determine a few maximum sizes. */ | |
3902 | max_contents_size = 0; | |
3903 | max_lineno_count = 0; | |
3904 | max_reloc_count = 0; | |
3905 | for (o = abfd->sections; o != NULL; o = o->next) | |
3906 | { | |
3907 | o->reloc_count = 0; | |
3908 | o->lineno_count = 0; | |
3909 | for (p = o->link_order_head; p != NULL; p = p->next) | |
3910 | { | |
3911 | if (p->type == bfd_indirect_link_order) | |
3912 | { | |
3913 | asection *sec; | |
3914 | ||
3915 | sec = p->u.indirect.section; | |
3916 | ||
3917 | /* Mark all sections which are to be included in the | |
3918 | link. This will normally be every section. We need | |
3919 | to do this so that we can identify any sections which | |
3920 | the linker has decided to not include. */ | |
3921 | sec->linker_mark = true; | |
3922 | ||
3923 | if (info->strip == strip_none | |
3924 | || info->strip == strip_some) | |
3925 | o->lineno_count += sec->lineno_count; | |
3926 | ||
3927 | o->reloc_count += sec->reloc_count; | |
3928 | ||
3929 | if (sec->_raw_size > max_contents_size) | |
3930 | max_contents_size = sec->_raw_size; | |
3931 | if (sec->lineno_count > max_lineno_count) | |
3932 | max_lineno_count = sec->lineno_count; | |
3933 | if (coff_section_data (sec->owner, sec) != NULL | |
3934 | && xcoff_section_data (sec->owner, sec) != NULL | |
3935 | && (xcoff_section_data (sec->owner, sec)->lineno_count | |
3936 | > max_lineno_count)) | |
3937 | max_lineno_count = | |
3938 | xcoff_section_data (sec->owner, sec)->lineno_count; | |
3939 | if (sec->reloc_count > max_reloc_count) | |
3940 | max_reloc_count = sec->reloc_count; | |
3941 | } | |
3942 | else if (p->type == bfd_section_reloc_link_order | |
3943 | || p->type == bfd_symbol_reloc_link_order) | |
3944 | ++o->reloc_count; | |
3945 | } | |
3946 | } | |
3947 | ||
3948 | /* Compute the file positions for all the sections. */ | |
3949 | if (abfd->output_has_begun) | |
3950 | { | |
3951 | if (xcoff_hash_table (info)->file_align != 0) | |
3952 | abort (); | |
3953 | } | |
3954 | else | |
3955 | { | |
3956 | bfd_vma file_align; | |
3957 | ||
3958 | file_align = xcoff_hash_table (info)->file_align; | |
3959 | if (file_align != 0) | |
3960 | { | |
3961 | boolean saw_contents; | |
3962 | int indx; | |
3963 | asection **op; | |
3964 | file_ptr sofar; | |
3965 | ||
3966 | /* Insert .pad sections before every section which has | |
3967 | contents and is loaded, if it is preceded by some other | |
3968 | section which has contents and is loaded. */ | |
3969 | saw_contents = true; | |
3970 | for (op = &abfd->sections; *op != NULL; op = &(*op)->next) | |
3971 | { | |
3972 | if (strcmp ((*op)->name, ".pad") == 0) | |
3973 | saw_contents = false; | |
3974 | else if (((*op)->flags & SEC_HAS_CONTENTS) != 0 | |
3975 | && ((*op)->flags & SEC_LOAD) != 0) | |
3976 | { | |
3977 | if (! saw_contents) | |
3978 | saw_contents = true; | |
3979 | else | |
3980 | { | |
3981 | asection *n, *hold; | |
3982 | ||
3983 | hold = *op; | |
3984 | *op = NULL; | |
3985 | n = bfd_make_section_anyway (abfd, ".pad"); | |
3986 | BFD_ASSERT (*op == n); | |
3987 | n->next = hold; | |
3988 | n->flags = SEC_HAS_CONTENTS; | |
3989 | n->alignment_power = 0; | |
3990 | saw_contents = false; | |
3991 | } | |
3992 | } | |
3993 | } | |
3994 | ||
3995 | /* Reset the section indices after inserting the new | |
3996 | sections. */ | |
3997 | indx = 0; | |
3998 | for (o = abfd->sections; o != NULL; o = o->next) | |
3999 | { | |
4000 | ++indx; | |
4001 | o->target_index = indx; | |
4002 | } | |
4003 | BFD_ASSERT ((unsigned int) indx == abfd->section_count); | |
4004 | ||
4005 | /* Work out appropriate sizes for the .pad sections to force | |
4006 | each section to land on a page boundary. This bit of | |
4007 | code knows what compute_section_file_positions is going | |
4008 | to do. */ | |
4009 | sofar = bfd_coff_filhsz (abfd); | |
4010 | sofar += bfd_coff_aoutsz (abfd); | |
4011 | sofar += abfd->section_count * bfd_coff_scnhsz (abfd); | |
4012 | for (o = abfd->sections; o != NULL; o = o->next) | |
4013 | if (o->reloc_count >= 0xffff || o->lineno_count >= 0xffff) | |
4014 | sofar += bfd_coff_scnhsz (abfd); | |
4015 | ||
4016 | for (o = abfd->sections; o != NULL; o = o->next) | |
4017 | { | |
4018 | if (strcmp (o->name, ".pad") == 0) | |
4019 | { | |
4020 | bfd_vma pageoff; | |
4021 | ||
4022 | BFD_ASSERT (o->_raw_size == 0); | |
4023 | pageoff = sofar & (file_align - 1); | |
4024 | if (pageoff != 0) | |
4025 | { | |
4026 | o->_raw_size = file_align - pageoff; | |
4027 | sofar += file_align - pageoff; | |
4028 | o->flags |= SEC_HAS_CONTENTS; | |
4029 | } | |
4030 | } | |
4031 | else | |
4032 | { | |
4033 | if ((o->flags & SEC_HAS_CONTENTS) != 0) | |
4034 | sofar += BFD_ALIGN (o->_raw_size, | |
4035 | 1 << o->alignment_power); | |
4036 | } | |
4037 | } | |
4038 | } | |
4039 | ||
4040 | if (! bfd_coff_compute_section_file_positions (abfd)) | |
4041 | goto error_return; | |
4042 | } | |
4043 | ||
4044 | /* Allocate space for the pointers we need to keep for the relocs. */ | |
4045 | { | |
4046 | unsigned int i; | |
4047 | ||
4048 | /* We use section_count + 1, rather than section_count, because | |
4049 | the target_index fields are 1 based. */ | |
4050 | finfo.section_info = | |
4051 | ((struct xcoff_link_section_info *) | |
4052 | bfd_malloc ((abfd->section_count + 1) | |
4053 | * sizeof (struct xcoff_link_section_info))); | |
4054 | if (finfo.section_info == NULL) | |
4055 | goto error_return; | |
4056 | for (i = 0; i <= abfd->section_count; i++) | |
4057 | { | |
4058 | finfo.section_info[i].relocs = NULL; | |
4059 | finfo.section_info[i].rel_hashes = NULL; | |
4060 | finfo.section_info[i].toc_rel_hashes = NULL; | |
4061 | } | |
4062 | } | |
4063 | ||
4064 | /* Set the file positions for the relocs. */ | |
4065 | rel_filepos = obj_relocbase (abfd); | |
4066 | relsz = bfd_coff_relsz (abfd); | |
4067 | max_output_reloc_count = 0; | |
4068 | for (o = abfd->sections; o != NULL; o = o->next) | |
4069 | { | |
4070 | if (o->reloc_count == 0) | |
4071 | o->rel_filepos = 0; | |
4072 | else | |
4073 | { | |
4074 | /* A stripped file has no relocs. However, we still | |
4075 | allocate the buffers, so that later code doesn't have to | |
4076 | worry about whether we are stripping or not. */ | |
4077 | if (info->strip == strip_all) | |
4078 | o->rel_filepos = 0; | |
4079 | else | |
4080 | { | |
4081 | o->flags |= SEC_RELOC; | |
4082 | o->rel_filepos = rel_filepos; | |
4083 | rel_filepos += o->reloc_count * relsz; | |
4084 | } | |
4085 | ||
4086 | /* We don't know the indices of global symbols until we have | |
4087 | written out all the local symbols. For each section in | |
4088 | the output file, we keep an array of pointers to hash | |
4089 | table entries. Each entry in the array corresponds to a | |
4090 | reloc. When we find a reloc against a global symbol, we | |
4091 | set the corresponding entry in this array so that we can | |
4092 | fix up the symbol index after we have written out all the | |
4093 | local symbols. | |
4094 | ||
4095 | Because of this problem, we also keep the relocs in | |
4096 | memory until the end of the link. This wastes memory. | |
4097 | We could backpatch the file later, I suppose, although it | |
4098 | would be slow. */ | |
4099 | finfo.section_info[o->target_index].relocs = | |
4100 | ((struct internal_reloc *) | |
4101 | bfd_malloc (o->reloc_count * sizeof (struct internal_reloc))); | |
4102 | finfo.section_info[o->target_index].rel_hashes = | |
4103 | ((struct xcoff_link_hash_entry **) | |
4104 | bfd_malloc (o->reloc_count | |
4105 | * sizeof (struct xcoff_link_hash_entry *))); | |
4106 | if (finfo.section_info[o->target_index].relocs == NULL | |
4107 | || finfo.section_info[o->target_index].rel_hashes == NULL) | |
4108 | goto error_return; | |
4109 | ||
4110 | if (o->reloc_count > max_output_reloc_count) | |
4111 | max_output_reloc_count = o->reloc_count; | |
4112 | } | |
4113 | } | |
4114 | ||
4115 | /* We now know the size of the relocs, so we can determine the file | |
4116 | positions of the line numbers. */ | |
4117 | line_filepos = rel_filepos; | |
4118 | finfo.line_filepos = line_filepos; | |
4119 | linesz = bfd_coff_linesz (abfd); | |
4120 | for (o = abfd->sections; o != NULL; o = o->next) | |
4121 | { | |
4122 | if (o->lineno_count == 0) | |
4123 | o->line_filepos = 0; | |
4124 | else | |
4125 | { | |
4126 | o->line_filepos = line_filepos; | |
4127 | line_filepos += o->lineno_count * linesz; | |
4128 | } | |
4129 | ||
4130 | /* Reset the reloc and lineno counts, so that we can use them to | |
4131 | count the number of entries we have output so far. */ | |
4132 | o->reloc_count = 0; | |
4133 | o->lineno_count = 0; | |
4134 | } | |
4135 | ||
4136 | obj_sym_filepos (abfd) = line_filepos; | |
4137 | ||
4138 | /* Figure out the largest number of symbols in an input BFD. Take | |
4139 | the opportunity to clear the output_has_begun fields of all the | |
4140 | input BFD's. We want at least 6 symbols, since that is the | |
4141 | number which xcoff_write_global_symbol may need. */ | |
4142 | max_sym_count = 6; | |
4143 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
4144 | { | |
4145 | size_t sz; | |
4146 | ||
4147 | sub->output_has_begun = false; | |
4148 | sz = obj_raw_syment_count (sub); | |
4149 | if (sz > max_sym_count) | |
4150 | max_sym_count = sz; | |
4151 | } | |
4152 | ||
4153 | /* Allocate some buffers used while linking. */ | |
4154 | finfo.internal_syms = ((struct internal_syment *) | |
4155 | bfd_malloc (max_sym_count | |
4156 | * sizeof (struct internal_syment))); | |
4157 | finfo.sym_indices = (long *) bfd_malloc (max_sym_count * sizeof (long)); | |
4158 | finfo.outsyms = ((bfd_byte *) | |
4159 | bfd_malloc ((size_t) ((max_sym_count + 1) * symesz))); | |
4160 | finfo.linenos = (bfd_byte *) bfd_malloc (max_lineno_count | |
4161 | * bfd_coff_linesz (abfd)); | |
4162 | finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); | |
4163 | finfo.external_relocs = (bfd_byte *) bfd_malloc (max_reloc_count * relsz); | |
4164 | if ((finfo.internal_syms == NULL && max_sym_count > 0) | |
4165 | || (finfo.sym_indices == NULL && max_sym_count > 0) | |
4166 | || finfo.outsyms == NULL | |
4167 | || (finfo.linenos == NULL && max_lineno_count > 0) | |
4168 | || (finfo.contents == NULL && max_contents_size > 0) | |
4169 | || (finfo.external_relocs == NULL && max_reloc_count > 0)) | |
4170 | goto error_return; | |
4171 | ||
4172 | obj_raw_syment_count (abfd) = 0; | |
4173 | xcoff_data (abfd)->toc = (bfd_vma) -1; | |
4174 | ||
4175 | /* We now know the position of everything in the file, except that | |
4176 | we don't know the size of the symbol table and therefore we don't | |
4177 | know where the string table starts. We just build the string | |
4178 | table in memory as we go along. We process all the relocations | |
4179 | for a single input file at once. */ | |
4180 | for (o = abfd->sections; o != NULL; o = o->next) | |
4181 | { | |
4182 | for (p = o->link_order_head; p != NULL; p = p->next) | |
4183 | { | |
4184 | if (p->type == bfd_indirect_link_order | |
4185 | && p->u.indirect.section->owner->xvec == abfd->xvec) | |
4186 | { | |
4187 | sub = p->u.indirect.section->owner; | |
4188 | if (! sub->output_has_begun) | |
4189 | { | |
4190 | if (! xcoff_link_input_bfd (&finfo, sub)) | |
4191 | goto error_return; | |
4192 | sub->output_has_begun = true; | |
4193 | } | |
4194 | } | |
4195 | else if (p->type == bfd_section_reloc_link_order | |
4196 | || p->type == bfd_symbol_reloc_link_order) | |
4197 | { | |
4198 | if (! xcoff_reloc_link_order (abfd, &finfo, o, p)) | |
4199 | goto error_return; | |
4200 | } | |
4201 | else | |
4202 | { | |
4203 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
4204 | goto error_return; | |
4205 | } | |
4206 | } | |
4207 | } | |
4208 | ||
4209 | /* Free up the buffers used by xcoff_link_input_bfd. */ | |
4210 | ||
4211 | if (finfo.internal_syms != NULL) | |
4212 | { | |
4213 | free (finfo.internal_syms); | |
4214 | finfo.internal_syms = NULL; | |
4215 | } | |
4216 | if (finfo.sym_indices != NULL) | |
4217 | { | |
4218 | free (finfo.sym_indices); | |
4219 | finfo.sym_indices = NULL; | |
4220 | } | |
4221 | if (finfo.linenos != NULL) | |
4222 | { | |
4223 | free (finfo.linenos); | |
4224 | finfo.linenos = NULL; | |
4225 | } | |
4226 | if (finfo.contents != NULL) | |
4227 | { | |
4228 | free (finfo.contents); | |
4229 | finfo.contents = NULL; | |
4230 | } | |
4231 | if (finfo.external_relocs != NULL) | |
4232 | { | |
4233 | free (finfo.external_relocs); | |
4234 | finfo.external_relocs = NULL; | |
4235 | } | |
4236 | ||
4237 | /* The value of the last C_FILE symbol is supposed to be -1. Write | |
4238 | it out again. */ | |
4239 | if (finfo.last_file_index != -1) | |
4240 | { | |
4241 | finfo.last_file.n_value = -1; | |
4242 | bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file, | |
4243 | (PTR) finfo.outsyms); | |
4244 | if (bfd_seek (abfd, | |
4245 | (obj_sym_filepos (abfd) | |
4246 | + finfo.last_file_index * symesz), | |
4247 | SEEK_SET) != 0 | |
4248 | || bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz) | |
4249 | goto error_return; | |
4250 | } | |
4251 | ||
4252 | /* Write out all the global symbols which do not come from XCOFF | |
4253 | input files. */ | |
4254 | xcoff_link_hash_traverse (xcoff_hash_table (info), | |
4255 | xcoff_write_global_symbol, | |
4256 | (PTR) &finfo); | |
4257 | ||
4258 | if (finfo.outsyms != NULL) | |
4259 | { | |
4260 | free (finfo.outsyms); | |
4261 | finfo.outsyms = NULL; | |
4262 | } | |
4263 | ||
4264 | /* Now that we have written out all the global symbols, we know the | |
4265 | symbol indices to use for relocs against them, and we can finally | |
4266 | write out the relocs. */ | |
4267 | external_relocs = (bfd_byte *) bfd_malloc (max_output_reloc_count * relsz); | |
4268 | if (external_relocs == NULL && max_output_reloc_count != 0) | |
4269 | goto error_return; | |
4270 | ||
4271 | for (o = abfd->sections; o != NULL; o = o->next) | |
4272 | { | |
4273 | struct internal_reloc *irel; | |
4274 | struct internal_reloc *irelend; | |
4275 | struct xcoff_link_hash_entry **rel_hash; | |
4276 | struct xcoff_toc_rel_hash *toc_rel_hash; | |
4277 | bfd_byte *erel; | |
4278 | ||
4279 | /* A stripped file has no relocs. */ | |
4280 | if (info->strip == strip_all) | |
4281 | { | |
4282 | o->reloc_count = 0; | |
4283 | continue; | |
4284 | } | |
4285 | ||
4286 | if (o->reloc_count == 0) | |
4287 | continue; | |
4288 | ||
4289 | irel = finfo.section_info[o->target_index].relocs; | |
4290 | irelend = irel + o->reloc_count; | |
4291 | rel_hash = finfo.section_info[o->target_index].rel_hashes; | |
4292 | for (; irel < irelend; irel++, rel_hash++, erel += relsz) | |
4293 | { | |
4294 | if (*rel_hash != NULL) | |
4295 | { | |
4296 | if ((*rel_hash)->indx < 0) | |
4297 | { | |
4298 | if (! ((*info->callbacks->unattached_reloc) | |
4299 | (info, (*rel_hash)->root.root.string, | |
4300 | (bfd *) NULL, o, irel->r_vaddr))) | |
4301 | goto error_return; | |
4302 | (*rel_hash)->indx = 0; | |
4303 | } | |
4304 | irel->r_symndx = (*rel_hash)->indx; | |
4305 | } | |
4306 | } | |
4307 | ||
4308 | for (toc_rel_hash = finfo.section_info[o->target_index].toc_rel_hashes; | |
4309 | toc_rel_hash != NULL; | |
4310 | toc_rel_hash = toc_rel_hash->next) | |
4311 | { | |
4312 | if (toc_rel_hash->h->u.toc_indx < 0) | |
4313 | { | |
4314 | if (! ((*info->callbacks->unattached_reloc) | |
4315 | (info, toc_rel_hash->h->root.root.string, | |
4316 | (bfd *) NULL, o, toc_rel_hash->rel->r_vaddr))) | |
4317 | goto error_return; | |
4318 | toc_rel_hash->h->u.toc_indx = 0; | |
4319 | } | |
4320 | toc_rel_hash->rel->r_symndx = toc_rel_hash->h->u.toc_indx; | |
4321 | } | |
4322 | ||
4323 | /* XCOFF requires that the relocs be sorted by address. We tend | |
4324 | to produce them in the order in which their containing csects | |
4325 | appear in the symbol table, which is not necessarily by | |
4326 | address. So we sort them here. There may be a better way to | |
4327 | do this. */ | |
4328 | qsort ((PTR) finfo.section_info[o->target_index].relocs, | |
4329 | o->reloc_count, sizeof (struct internal_reloc), | |
4330 | xcoff_sort_relocs); | |
4331 | ||
4332 | irel = finfo.section_info[o->target_index].relocs; | |
4333 | irelend = irel + o->reloc_count; | |
4334 | erel = external_relocs; | |
4335 | for (; irel < irelend; irel++, rel_hash++, erel += relsz) | |
4336 | bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel); | |
4337 | ||
4338 | if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0 | |
4339 | || bfd_write ((PTR) external_relocs, relsz, o->reloc_count, | |
4340 | abfd) != relsz * o->reloc_count) | |
4341 | goto error_return; | |
4342 | } | |
4343 | ||
4344 | if (external_relocs != NULL) | |
4345 | { | |
4346 | free (external_relocs); | |
4347 | external_relocs = NULL; | |
4348 | } | |
4349 | ||
4350 | /* Free up the section information. */ | |
4351 | if (finfo.section_info != NULL) | |
4352 | { | |
4353 | unsigned int i; | |
4354 | ||
4355 | for (i = 0; i < abfd->section_count; i++) | |
4356 | { | |
4357 | if (finfo.section_info[i].relocs != NULL) | |
4358 | free (finfo.section_info[i].relocs); | |
4359 | if (finfo.section_info[i].rel_hashes != NULL) | |
4360 | free (finfo.section_info[i].rel_hashes); | |
4361 | } | |
4362 | free (finfo.section_info); | |
4363 | finfo.section_info = NULL; | |
4364 | } | |
4365 | ||
4366 | /* Write out the loader section contents. */ | |
4367 | BFD_ASSERT ((bfd_byte *) finfo.ldrel | |
4368 | == (xcoff_hash_table (info)->loader_section->contents | |
4369 | + xcoff_hash_table (info)->ldhdr.l_impoff)); | |
4370 | o = xcoff_hash_table (info)->loader_section; | |
4371 | if (! bfd_set_section_contents (abfd, o->output_section, | |
4372 | o->contents, o->output_offset, | |
4373 | o->_raw_size)) | |
4374 | goto error_return; | |
4375 | ||
4376 | /* Write out the magic sections. */ | |
4377 | o = xcoff_hash_table (info)->linkage_section; | |
4378 | if (o->_raw_size > 0 | |
4379 | && ! bfd_set_section_contents (abfd, o->output_section, o->contents, | |
4380 | o->output_offset, o->_raw_size)) | |
4381 | goto error_return; | |
4382 | o = xcoff_hash_table (info)->toc_section; | |
4383 | if (o->_raw_size > 0 | |
4384 | && ! bfd_set_section_contents (abfd, o->output_section, o->contents, | |
4385 | o->output_offset, o->_raw_size)) | |
4386 | goto error_return; | |
4387 | o = xcoff_hash_table (info)->descriptor_section; | |
4388 | if (o->_raw_size > 0 | |
4389 | && ! bfd_set_section_contents (abfd, o->output_section, o->contents, | |
4390 | o->output_offset, o->_raw_size)) | |
4391 | goto error_return; | |
4392 | ||
4393 | /* Write out the string table. */ | |
4394 | if (bfd_seek (abfd, | |
4395 | (obj_sym_filepos (abfd) | |
4396 | + obj_raw_syment_count (abfd) * symesz), | |
4397 | SEEK_SET) != 0) | |
4398 | goto error_return; | |
4399 | bfd_h_put_32 (abfd, | |
4400 | _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE, | |
4401 | (bfd_byte *) strbuf); | |
4402 | if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE) | |
4403 | goto error_return; | |
4404 | if (! _bfd_stringtab_emit (abfd, finfo.strtab)) | |
4405 | goto error_return; | |
4406 | ||
4407 | _bfd_stringtab_free (finfo.strtab); | |
4408 | ||
4409 | /* Write out the debugging string table. */ | |
4410 | o = xcoff_hash_table (info)->debug_section; | |
4411 | if (o != NULL) | |
4412 | { | |
4413 | struct bfd_strtab_hash *debug_strtab; | |
4414 | ||
4415 | debug_strtab = xcoff_hash_table (info)->debug_strtab; | |
4416 | BFD_ASSERT (o->output_section->_raw_size - o->output_offset | |
4417 | >= _bfd_stringtab_size (debug_strtab)); | |
4418 | if (bfd_seek (abfd, | |
4419 | o->output_section->filepos + o->output_offset, | |
4420 | SEEK_SET) != 0) | |
4421 | goto error_return; | |
4422 | if (! _bfd_stringtab_emit (abfd, debug_strtab)) | |
4423 | goto error_return; | |
4424 | } | |
4425 | ||
4426 | /* Setting bfd_get_symcount to 0 will cause write_object_contents to | |
4427 | not try to write out the symbols. */ | |
4428 | bfd_get_symcount (abfd) = 0; | |
4429 | ||
4430 | return true; | |
4431 | ||
4432 | error_return: | |
4433 | if (finfo.strtab != NULL) | |
4434 | _bfd_stringtab_free (finfo.strtab); | |
4435 | if (finfo.section_info != NULL) | |
4436 | { | |
4437 | unsigned int i; | |
4438 | ||
4439 | for (i = 0; i < abfd->section_count; i++) | |
4440 | { | |
4441 | if (finfo.section_info[i].relocs != NULL) | |
4442 | free (finfo.section_info[i].relocs); | |
4443 | if (finfo.section_info[i].rel_hashes != NULL) | |
4444 | free (finfo.section_info[i].rel_hashes); | |
4445 | } | |
4446 | free (finfo.section_info); | |
4447 | } | |
4448 | if (finfo.internal_syms != NULL) | |
4449 | free (finfo.internal_syms); | |
4450 | if (finfo.sym_indices != NULL) | |
4451 | free (finfo.sym_indices); | |
4452 | if (finfo.outsyms != NULL) | |
4453 | free (finfo.outsyms); | |
4454 | if (finfo.linenos != NULL) | |
4455 | free (finfo.linenos); | |
4456 | if (finfo.contents != NULL) | |
4457 | free (finfo.contents); | |
4458 | if (finfo.external_relocs != NULL) | |
4459 | free (finfo.external_relocs); | |
4460 | if (external_relocs != NULL) | |
4461 | free (external_relocs); | |
4462 | return false; | |
4463 | } | |
4464 | ||
4465 | /* Link an input file into the linker output file. This function | |
4466 | handles all the sections and relocations of the input file at once. */ | |
4467 | ||
4468 | static boolean | |
4469 | xcoff_link_input_bfd (finfo, input_bfd) | |
4470 | struct xcoff_final_link_info *finfo; | |
4471 | bfd *input_bfd; | |
4472 | { | |
4473 | bfd *output_bfd; | |
4474 | const char *strings; | |
4475 | bfd_size_type syment_base; | |
4476 | unsigned int n_tmask; | |
4477 | unsigned int n_btshft; | |
4478 | boolean copy, hash; | |
4479 | bfd_size_type isymesz; | |
4480 | bfd_size_type osymesz; | |
4481 | bfd_size_type linesz; | |
4482 | bfd_byte *esym; | |
4483 | bfd_byte *esym_end; | |
4484 | struct xcoff_link_hash_entry **sym_hash; | |
4485 | struct internal_syment *isymp; | |
4486 | asection **csectpp; | |
4487 | unsigned long *debug_index; | |
4488 | long *indexp; | |
4489 | unsigned long output_index; | |
4490 | bfd_byte *outsym; | |
4491 | unsigned int incls; | |
4492 | asection *oline; | |
4493 | boolean keep_syms; | |
4494 | asection *o; | |
4495 | ||
4496 | /* We can just skip DYNAMIC files, unless this is a static link. */ | |
4497 | if ((input_bfd->flags & DYNAMIC) != 0 | |
4498 | && ! finfo->info->static_link) | |
4499 | return true; | |
4500 | ||
4501 | /* Move all the symbols to the output file. */ | |
4502 | ||
4503 | output_bfd = finfo->output_bfd; | |
4504 | strings = NULL; | |
4505 | syment_base = obj_raw_syment_count (output_bfd); | |
4506 | isymesz = bfd_coff_symesz (input_bfd); | |
4507 | osymesz = bfd_coff_symesz (output_bfd); | |
4508 | linesz = bfd_coff_linesz (input_bfd); | |
4509 | BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd)); | |
4510 | ||
4511 | n_tmask = coff_data (input_bfd)->local_n_tmask; | |
4512 | n_btshft = coff_data (input_bfd)->local_n_btshft; | |
4513 | ||
4514 | /* Define macros so that ISFCN, et. al., macros work correctly. */ | |
4515 | #define N_TMASK n_tmask | |
4516 | #define N_BTSHFT n_btshft | |
4517 | ||
4518 | copy = false; | |
4519 | if (! finfo->info->keep_memory) | |
4520 | copy = true; | |
4521 | hash = true; | |
4522 | if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) | |
4523 | hash = false; | |
4524 | ||
4525 | if (! _bfd_coff_get_external_symbols (input_bfd)) | |
4526 | return false; | |
4527 | ||
4528 | esym = (bfd_byte *) obj_coff_external_syms (input_bfd); | |
4529 | esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; | |
4530 | sym_hash = obj_xcoff_sym_hashes (input_bfd); | |
4531 | csectpp = xcoff_data (input_bfd)->csects; | |
4532 | debug_index = xcoff_data (input_bfd)->debug_indices; | |
4533 | isymp = finfo->internal_syms; | |
4534 | indexp = finfo->sym_indices; | |
4535 | output_index = syment_base; | |
4536 | outsym = finfo->outsyms; | |
4537 | incls = 0; | |
4538 | oline = NULL; | |
4539 | ||
4540 | while (esym < esym_end) | |
4541 | { | |
4542 | struct internal_syment isym; | |
4543 | union internal_auxent aux; | |
4544 | int smtyp = 0; | |
4545 | boolean skip; | |
4546 | boolean require; | |
4547 | int add; | |
4548 | ||
4549 | bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp); | |
4550 | ||
4551 | /* If this is a C_EXT or C_HIDEXT symbol, we need the csect | |
4552 | information. */ | |
4553 | if (isymp->n_sclass == C_EXT || isymp->n_sclass == C_HIDEXT) | |
4554 | { | |
4555 | BFD_ASSERT (isymp->n_numaux > 0); | |
4556 | bfd_coff_swap_aux_in (input_bfd, | |
4557 | (PTR) (esym + isymesz * isymp->n_numaux), | |
4558 | isymp->n_type, isymp->n_sclass, | |
4559 | isymp->n_numaux - 1, isymp->n_numaux, | |
4560 | (PTR) &aux); | |
4561 | smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp); | |
4562 | } | |
4563 | ||
4564 | /* Make a copy of *isymp so that the relocate_section function | |
4565 | always sees the original values. This is more reliable than | |
4566 | always recomputing the symbol value even if we are stripping | |
4567 | the symbol. */ | |
4568 | isym = *isymp; | |
4569 | ||
4570 | /* If this symbol is in the .loader section, swap out the | |
4571 | .loader symbol information. If this is an external symbol | |
4572 | reference to a defined symbol, though, then wait until we get | |
4573 | to the definition. */ | |
4574 | if (isym.n_sclass == C_EXT | |
4575 | && *sym_hash != NULL | |
4576 | && (*sym_hash)->ldsym != NULL | |
4577 | && (smtyp != XTY_ER | |
4578 | || (*sym_hash)->root.type == bfd_link_hash_undefined)) | |
4579 | { | |
4580 | struct xcoff_link_hash_entry *h; | |
4581 | struct internal_ldsym *ldsym; | |
4582 | ||
4583 | h = *sym_hash; | |
4584 | ldsym = h->ldsym; | |
4585 | if (isym.n_scnum > 0) | |
4586 | { | |
4587 | ldsym->l_scnum = (*csectpp)->output_section->target_index; | |
4588 | ldsym->l_value = (isym.n_value | |
4589 | + (*csectpp)->output_section->vma | |
4590 | + (*csectpp)->output_offset | |
4591 | - (*csectpp)->vma); | |
4592 | } | |
4593 | else | |
4594 | { | |
4595 | ldsym->l_scnum = isym.n_scnum; | |
4596 | ldsym->l_value = isym.n_value; | |
4597 | } | |
4598 | ||
4599 | ldsym->l_smtype = smtyp; | |
4600 | if (((h->flags & XCOFF_DEF_REGULAR) == 0 | |
4601 | && (h->flags & XCOFF_DEF_DYNAMIC) != 0) | |
4602 | || (h->flags & XCOFF_IMPORT) != 0) | |
4603 | ldsym->l_smtype |= L_IMPORT; | |
4604 | if (((h->flags & XCOFF_DEF_REGULAR) != 0 | |
4605 | && (h->flags & XCOFF_DEF_DYNAMIC) != 0) | |
4606 | || (h->flags & XCOFF_EXPORT) != 0) | |
4607 | ldsym->l_smtype |= L_EXPORT; | |
4608 | if ((h->flags & XCOFF_ENTRY) != 0) | |
4609 | ldsym->l_smtype |= L_ENTRY; | |
4610 | ||
4611 | ldsym->l_smclas = aux.x_csect.x_smclas; | |
4612 | ||
4613 | if (ldsym->l_ifile == (bfd_size_type) -1) | |
4614 | ldsym->l_ifile = 0; | |
4615 | else if (ldsym->l_ifile == 0) | |
4616 | { | |
4617 | if ((ldsym->l_smtype & L_IMPORT) == 0) | |
4618 | ldsym->l_ifile = 0; | |
4619 | else | |
4620 | { | |
4621 | bfd *impbfd; | |
4622 | ||
4623 | if (h->root.type == bfd_link_hash_defined | |
4624 | || h->root.type == bfd_link_hash_defweak) | |
4625 | impbfd = h->root.u.def.section->owner; | |
4626 | else if (h->root.type == bfd_link_hash_undefined | |
4627 | || h->root.type == bfd_link_hash_undefweak) | |
4628 | impbfd = h->root.u.undef.abfd; | |
4629 | else | |
4630 | impbfd = NULL; | |
4631 | ||
4632 | if (impbfd == NULL) | |
4633 | ldsym->l_ifile = 0; | |
4634 | else | |
4635 | { | |
4636 | BFD_ASSERT (impbfd->xvec == finfo->output_bfd->xvec); | |
4637 | ldsym->l_ifile = xcoff_data (impbfd)->import_file_id; | |
4638 | } | |
4639 | } | |
4640 | } | |
4641 | ||
4642 | ldsym->l_parm = 0; | |
4643 | ||
4644 | BFD_ASSERT (h->ldindx >= 0); | |
4645 | BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym)); | |
4646 | xcoff_swap_ldsym_out (finfo->output_bfd, ldsym, | |
4647 | finfo->ldsym + h->ldindx - 3); | |
4648 | h->ldsym = NULL; | |
4649 | ||
4650 | /* Fill in snentry now that we know the target_index. */ | |
4651 | if ((h->flags & XCOFF_ENTRY) != 0 | |
4652 | && (h->root.type == bfd_link_hash_defined | |
4653 | || h->root.type == bfd_link_hash_defweak)) | |
4654 | xcoff_data (output_bfd)->snentry = | |
4655 | h->root.u.def.section->output_section->target_index; | |
4656 | } | |
4657 | ||
4658 | *indexp = -1; | |
4659 | ||
4660 | skip = false; | |
4661 | require = false; | |
4662 | add = 1 + isym.n_numaux; | |
4663 | ||
4664 | /* If we are skipping this csect, we want to skip this symbol. */ | |
4665 | if (*csectpp == NULL) | |
4666 | skip = true; | |
4667 | ||
4668 | /* If we garbage collected this csect, we want to skip this | |
4669 | symbol. */ | |
4670 | if (! skip | |
4671 | && xcoff_hash_table (finfo->info)->gc | |
4672 | && ((*csectpp)->flags & SEC_MARK) == 0 | |
4673 | && *csectpp != bfd_abs_section_ptr) | |
4674 | skip = true; | |
4675 | ||
4676 | /* An XCOFF linker always skips C_STAT symbols. */ | |
4677 | if (! skip | |
4678 | && isymp->n_sclass == C_STAT) | |
4679 | skip = true; | |
4680 | ||
4681 | /* We skip all but the first TOC anchor. */ | |
4682 | if (! skip | |
4683 | && isymp->n_sclass == C_HIDEXT | |
4684 | && aux.x_csect.x_smclas == XMC_TC0) | |
4685 | { | |
4686 | if (finfo->toc_symindx != -1) | |
4687 | skip = true; | |
4688 | else | |
4689 | { | |
4690 | bfd_vma tocval, tocend; | |
4691 | ||
4692 | tocval = ((*csectpp)->output_section->vma | |
4693 | + (*csectpp)->output_offset | |
4694 | + isym.n_value | |
4695 | - (*csectpp)->vma); | |
4696 | /* We want to find out if tocval is a good value to use | |
4697 | as the TOC anchor--that is, whether we can access all | |
4698 | of the TOC using a 16 bit offset from tocval. This | |
4699 | test assumes that the TOC comes at the end of the | |
4700 | output section, as it does in the default linker | |
4701 | script. FIXME: This doesn't handle .tocbss sections | |
4702 | created from XMC_TD common symbols correctly. */ | |
4703 | ||
4704 | tocend = ((*csectpp)->output_section->vma | |
4705 | + (*csectpp)->output_section->_raw_size); | |
4706 | ||
4707 | if (tocval + 0x10000 < tocend) | |
4708 | { | |
4709 | (*_bfd_error_handler) | |
4710 | (_("TOC overflow: 0x%lx > 0x10000; try -mminimal-toc when compiling"), | |
4711 | (unsigned long) (tocend - tocval)); | |
4712 | bfd_set_error (bfd_error_file_too_big); | |
4713 | return false; | |
4714 | } | |
4715 | ||
4716 | if (tocval + 0x8000 < tocend) | |
4717 | { | |
4718 | bfd_vma tocadd; | |
4719 | ||
4720 | tocadd = tocend - (tocval + 0x8000); | |
4721 | tocval += tocadd; | |
4722 | isym.n_value += tocadd; | |
4723 | } | |
4724 | ||
4725 | finfo->toc_symindx = output_index; | |
4726 | xcoff_data (finfo->output_bfd)->toc = tocval; | |
4727 | xcoff_data (finfo->output_bfd)->sntoc = | |
4728 | (*csectpp)->output_section->target_index; | |
4729 | require = true; | |
4730 | } | |
4731 | } | |
4732 | ||
4733 | /* If we are stripping all symbols, we want to skip this one. */ | |
4734 | if (! skip | |
4735 | && finfo->info->strip == strip_all) | |
4736 | skip = true; | |
4737 | ||
4738 | /* We can skip resolved external references. */ | |
4739 | if (! skip | |
4740 | && isym.n_sclass == C_EXT | |
4741 | && smtyp == XTY_ER | |
4742 | && (*sym_hash)->root.type != bfd_link_hash_undefined) | |
4743 | skip = true; | |
4744 | ||
4745 | /* We can skip common symbols if they got defined somewhere | |
4746 | else. */ | |
4747 | if (! skip | |
4748 | && isym.n_sclass == C_EXT | |
4749 | && smtyp == XTY_CM | |
4750 | && ((*sym_hash)->root.type != bfd_link_hash_common | |
4751 | || (*sym_hash)->root.u.c.p->section != *csectpp) | |
4752 | && ((*sym_hash)->root.type != bfd_link_hash_defined | |
4753 | || (*sym_hash)->root.u.def.section != *csectpp)) | |
4754 | skip = true; | |
4755 | ||
4756 | /* Skip local symbols if we are discarding them. */ | |
4757 | if (! skip | |
4758 | && finfo->info->discard == discard_all | |
4759 | && isym.n_sclass != C_EXT | |
4760 | && (isym.n_sclass != C_HIDEXT | |
4761 | || smtyp != XTY_SD)) | |
4762 | skip = true; | |
4763 | ||
4764 | /* If we stripping debugging symbols, and this is a debugging | |
4765 | symbol, then skip it. */ | |
4766 | if (! skip | |
4767 | && finfo->info->strip == strip_debugger | |
4768 | && isym.n_scnum == N_DEBUG) | |
4769 | skip = true; | |
4770 | ||
4771 | /* If some symbols are stripped based on the name, work out the | |
4772 | name and decide whether to skip this symbol. We don't handle | |
4773 | this correctly for symbols whose names are in the .debug | |
4774 | section; to get it right we would need a new bfd_strtab_hash | |
4775 | function to return the string given the index. */ | |
4776 | if (! skip | |
4777 | && (finfo->info->strip == strip_some | |
4778 | || finfo->info->discard == discard_l) | |
4779 | && (debug_index == NULL || *debug_index == (unsigned long) -1)) | |
4780 | { | |
4781 | const char *name; | |
4782 | char buf[SYMNMLEN + 1]; | |
4783 | ||
4784 | name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf); | |
4785 | if (name == NULL) | |
4786 | return false; | |
4787 | ||
4788 | if ((finfo->info->strip == strip_some | |
4789 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, | |
4790 | false) == NULL)) | |
4791 | || (finfo->info->discard == discard_l | |
4792 | && (isym.n_sclass != C_EXT | |
4793 | && (isym.n_sclass != C_HIDEXT | |
4794 | || smtyp != XTY_SD)) | |
4795 | && bfd_is_local_label_name (input_bfd, name))) | |
4796 | skip = true; | |
4797 | } | |
4798 | ||
4799 | /* We can not skip the first TOC anchor. */ | |
4800 | if (skip | |
4801 | && require | |
4802 | && finfo->info->strip != strip_all) | |
4803 | skip = false; | |
4804 | ||
4805 | /* We now know whether we are to skip this symbol or not. */ | |
4806 | if (! skip) | |
4807 | { | |
4808 | /* Adjust the symbol in order to output it. */ | |
4809 | ||
4810 | if (isym._n._n_n._n_zeroes == 0 | |
4811 | && isym._n._n_n._n_offset != 0) | |
4812 | { | |
4813 | /* This symbol has a long name. Enter it in the string | |
4814 | table we are building. If *debug_index != -1, the | |
4815 | name has already been entered in the .debug section. */ | |
4816 | if (debug_index != NULL && *debug_index != (unsigned long) -1) | |
4817 | isym._n._n_n._n_offset = *debug_index; | |
4818 | else | |
4819 | { | |
4820 | const char *name; | |
4821 | bfd_size_type indx; | |
4822 | ||
4823 | name = _bfd_coff_internal_syment_name (input_bfd, &isym, | |
4824 | (char *) NULL); | |
4825 | if (name == NULL) | |
4826 | return false; | |
4827 | indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy); | |
4828 | if (indx == (bfd_size_type) -1) | |
4829 | return false; | |
4830 | isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; | |
4831 | } | |
4832 | } | |
4833 | ||
4834 | if (isym.n_sclass != C_BSTAT | |
4835 | && isym.n_sclass != C_ESTAT | |
4836 | && isym.n_sclass != C_DECL | |
4837 | && isym.n_scnum > 0) | |
4838 | { | |
4839 | isym.n_scnum = (*csectpp)->output_section->target_index; | |
4840 | isym.n_value += ((*csectpp)->output_section->vma | |
4841 | + (*csectpp)->output_offset | |
4842 | - (*csectpp)->vma); | |
4843 | } | |
4844 | ||
4845 | /* The value of a C_FILE symbol is the symbol index of the | |
4846 | next C_FILE symbol. The value of the last C_FILE symbol | |
4847 | is -1. We try to get this right, below, just before we | |
4848 | write the symbols out, but in the general case we may | |
4849 | have to write the symbol out twice. */ | |
4850 | if (isym.n_sclass == C_FILE) | |
4851 | { | |
4852 | if (finfo->last_file_index != -1 | |
4853 | && finfo->last_file.n_value != (long) output_index) | |
4854 | { | |
4855 | /* We must correct the value of the last C_FILE entry. */ | |
4856 | finfo->last_file.n_value = output_index; | |
4857 | if ((bfd_size_type) finfo->last_file_index >= syment_base) | |
4858 | { | |
4859 | /* The last C_FILE symbol is in this input file. */ | |
4860 | bfd_coff_swap_sym_out (output_bfd, | |
4861 | (PTR) &finfo->last_file, | |
4862 | (PTR) (finfo->outsyms | |
4863 | + ((finfo->last_file_index | |
4864 | - syment_base) | |
4865 | * osymesz))); | |
4866 | } | |
4867 | else | |
4868 | { | |
4869 | /* We have already written out the last C_FILE | |
4870 | symbol. We need to write it out again. We | |
4871 | borrow *outsym temporarily. */ | |
4872 | bfd_coff_swap_sym_out (output_bfd, | |
4873 | (PTR) &finfo->last_file, | |
4874 | (PTR) outsym); | |
4875 | if (bfd_seek (output_bfd, | |
4876 | (obj_sym_filepos (output_bfd) | |
4877 | + finfo->last_file_index * osymesz), | |
4878 | SEEK_SET) != 0 | |
4879 | || (bfd_write (outsym, osymesz, 1, output_bfd) | |
4880 | != osymesz)) | |
4881 | return false; | |
4882 | } | |
4883 | } | |
4884 | ||
4885 | finfo->last_file_index = output_index; | |
4886 | finfo->last_file = isym; | |
4887 | } | |
4888 | ||
4889 | /* The value of a C_BINCL or C_EINCL symbol is a file offset | |
4890 | into the line numbers. We update the symbol values when | |
4891 | we handle the line numbers. */ | |
4892 | if (isym.n_sclass == C_BINCL | |
4893 | || isym.n_sclass == C_EINCL) | |
4894 | { | |
4895 | isym.n_value = finfo->line_filepos; | |
4896 | ++incls; | |
4897 | } | |
4898 | ||
4899 | /* Output the symbol. */ | |
4900 | ||
4901 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); | |
4902 | ||
4903 | *indexp = output_index; | |
4904 | ||
4905 | if (isym.n_sclass == C_EXT) | |
4906 | { | |
4907 | long indx; | |
4908 | struct xcoff_link_hash_entry *h; | |
4909 | ||
4910 | indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd)) | |
4911 | / isymesz); | |
4912 | h = obj_xcoff_sym_hashes (input_bfd)[indx]; | |
4913 | BFD_ASSERT (h != NULL); | |
4914 | h->indx = output_index; | |
4915 | } | |
4916 | ||
4917 | /* If this is a symbol in the TOC which we may have merged | |
4918 | (class XMC_TC), remember the symbol index of the TOC | |
4919 | symbol. */ | |
4920 | if (isym.n_sclass == C_HIDEXT | |
4921 | && aux.x_csect.x_smclas == XMC_TC | |
4922 | && *sym_hash != NULL) | |
4923 | { | |
4924 | BFD_ASSERT (((*sym_hash)->flags & XCOFF_SET_TOC) == 0); | |
4925 | BFD_ASSERT ((*sym_hash)->toc_section != NULL); | |
4926 | (*sym_hash)->u.toc_indx = output_index; | |
4927 | } | |
4928 | ||
4929 | output_index += add; | |
4930 | outsym += add * osymesz; | |
4931 | } | |
4932 | ||
4933 | esym += add * isymesz; | |
4934 | isymp += add; | |
4935 | csectpp += add; | |
4936 | sym_hash += add; | |
4937 | if (debug_index != NULL) | |
4938 | debug_index += add; | |
4939 | ++indexp; | |
4940 | for (--add; add > 0; --add) | |
4941 | *indexp++ = -1; | |
4942 | } | |
4943 | ||
4944 | /* Fix up the aux entries and the C_BSTAT symbols. This must be | |
4945 | done in a separate pass, because we don't know the correct symbol | |
4946 | indices until we have already decided which symbols we are going | |
4947 | to keep. */ | |
4948 | ||
4949 | esym = (bfd_byte *) obj_coff_external_syms (input_bfd); | |
4950 | esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; | |
4951 | isymp = finfo->internal_syms; | |
4952 | indexp = finfo->sym_indices; | |
4953 | csectpp = xcoff_data (input_bfd)->csects; | |
4954 | outsym = finfo->outsyms; | |
4955 | while (esym < esym_end) | |
4956 | { | |
4957 | int add; | |
4958 | ||
4959 | add = 1 + isymp->n_numaux; | |
4960 | ||
4961 | if (*indexp < 0) | |
4962 | esym += add * isymesz; | |
4963 | else | |
4964 | { | |
4965 | int i; | |
4966 | ||
4967 | if (isymp->n_sclass == C_BSTAT) | |
4968 | { | |
4969 | struct internal_syment isym; | |
4970 | unsigned long indx; | |
4971 | ||
4972 | /* The value of a C_BSTAT symbol is the symbol table | |
4973 | index of the containing csect. */ | |
4974 | bfd_coff_swap_sym_in (output_bfd, (PTR) outsym, (PTR) &isym); | |
4975 | indx = isym.n_value; | |
4976 | if (indx < obj_raw_syment_count (input_bfd)) | |
4977 | { | |
4978 | long symindx; | |
4979 | ||
4980 | symindx = finfo->sym_indices[indx]; | |
4981 | if (symindx < 0) | |
4982 | isym.n_value = 0; | |
4983 | else | |
4984 | isym.n_value = symindx; | |
4985 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, | |
4986 | (PTR) outsym); | |
4987 | } | |
4988 | } | |
4989 | ||
4990 | esym += isymesz; | |
4991 | outsym += osymesz; | |
4992 | ||
4993 | for (i = 0; i < isymp->n_numaux && esym < esym_end; i++) | |
4994 | { | |
4995 | union internal_auxent aux; | |
4996 | ||
4997 | bfd_coff_swap_aux_in (input_bfd, (PTR) esym, isymp->n_type, | |
4998 | isymp->n_sclass, i, isymp->n_numaux, | |
4999 | (PTR) &aux); | |
5000 | ||
5001 | if (isymp->n_sclass == C_FILE) | |
5002 | { | |
5003 | /* This is the file name (or some comment put in by | |
5004 | the compiler). If it is long, we must put it in | |
5005 | the string table. */ | |
5006 | if (aux.x_file.x_n.x_zeroes == 0 | |
5007 | && aux.x_file.x_n.x_offset != 0) | |
5008 | { | |
5009 | const char *filename; | |
5010 | bfd_size_type indx; | |
5011 | ||
5012 | BFD_ASSERT (aux.x_file.x_n.x_offset | |
5013 | >= STRING_SIZE_SIZE); | |
5014 | if (strings == NULL) | |
5015 | { | |
5016 | strings = _bfd_coff_read_string_table (input_bfd); | |
5017 | if (strings == NULL) | |
5018 | return false; | |
5019 | } | |
5020 | filename = strings + aux.x_file.x_n.x_offset; | |
5021 | indx = _bfd_stringtab_add (finfo->strtab, filename, | |
5022 | hash, copy); | |
5023 | if (indx == (bfd_size_type) -1) | |
5024 | return false; | |
5025 | aux.x_file.x_n.x_offset = STRING_SIZE_SIZE + indx; | |
5026 | } | |
5027 | } | |
5028 | else if ((isymp->n_sclass == C_EXT | |
5029 | || isymp->n_sclass == C_HIDEXT) | |
5030 | && i + 1 == isymp->n_numaux) | |
5031 | { | |
5032 | /* We don't support type checking. I don't know if | |
5033 | anybody does. */ | |
5034 | aux.x_csect.x_parmhash = 0; | |
5035 | /* I don't think anybody uses these fields, but we'd | |
5036 | better clobber them just in case. */ | |
5037 | aux.x_csect.x_stab = 0; | |
5038 | aux.x_csect.x_snstab = 0; | |
5039 | if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_LD) | |
5040 | { | |
5041 | unsigned long indx; | |
5042 | ||
5043 | indx = aux.x_csect.x_scnlen.l; | |
5044 | if (indx < obj_raw_syment_count (input_bfd)) | |
5045 | { | |
5046 | long symindx; | |
5047 | ||
5048 | symindx = finfo->sym_indices[indx]; | |
5049 | if (symindx < 0) | |
5050 | aux.x_sym.x_tagndx.l = 0; | |
5051 | else | |
5052 | aux.x_sym.x_tagndx.l = symindx; | |
5053 | } | |
5054 | } | |
5055 | } | |
5056 | else if (isymp->n_sclass != C_STAT || isymp->n_type != T_NULL) | |
5057 | { | |
5058 | unsigned long indx; | |
5059 | ||
5060 | if (ISFCN (isymp->n_type) | |
5061 | || ISTAG (isymp->n_sclass) | |
5062 | || isymp->n_sclass == C_BLOCK | |
5063 | || isymp->n_sclass == C_FCN) | |
5064 | { | |
5065 | indx = aux.x_sym.x_fcnary.x_fcn.x_endndx.l; | |
5066 | if (indx > 0 | |
5067 | && indx < obj_raw_syment_count (input_bfd)) | |
5068 | { | |
5069 | /* We look forward through the symbol for | |
5070 | the index of the next symbol we are going | |
5071 | to include. I don't know if this is | |
5072 | entirely right. */ | |
5073 | while (finfo->sym_indices[indx] < 0 | |
5074 | && indx < obj_raw_syment_count (input_bfd)) | |
5075 | ++indx; | |
5076 | if (indx >= obj_raw_syment_count (input_bfd)) | |
5077 | indx = output_index; | |
5078 | else | |
5079 | indx = finfo->sym_indices[indx]; | |
5080 | aux.x_sym.x_fcnary.x_fcn.x_endndx.l = indx; | |
5081 | } | |
5082 | } | |
5083 | ||
5084 | indx = aux.x_sym.x_tagndx.l; | |
5085 | if (indx > 0 && indx < obj_raw_syment_count (input_bfd)) | |
5086 | { | |
5087 | long symindx; | |
5088 | ||
5089 | symindx = finfo->sym_indices[indx]; | |
5090 | if (symindx < 0) | |
5091 | aux.x_sym.x_tagndx.l = 0; | |
5092 | else | |
5093 | aux.x_sym.x_tagndx.l = symindx; | |
5094 | } | |
5095 | } | |
5096 | ||
5097 | /* Copy over the line numbers, unless we are stripping | |
5098 | them. We do this on a symbol by symbol basis in | |
5099 | order to more easily handle garbage collection. */ | |
5100 | if ((isymp->n_sclass == C_EXT | |
5101 | || isymp->n_sclass == C_HIDEXT) | |
5102 | && i == 0 | |
5103 | && isymp->n_numaux > 1 | |
5104 | && ISFCN (isymp->n_type) | |
5105 | && aux.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0) | |
5106 | { | |
5107 | if (finfo->info->strip != strip_none | |
5108 | && finfo->info->strip != strip_some) | |
5109 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0; | |
5110 | else | |
5111 | { | |
5112 | asection *enclosing; | |
5113 | unsigned int enc_count; | |
5114 | bfd_size_type linoff; | |
5115 | struct internal_lineno lin; | |
5116 | ||
5117 | o = *csectpp; | |
5118 | enclosing = xcoff_section_data (abfd, o)->enclosing; | |
5119 | enc_count = xcoff_section_data (abfd, o)->lineno_count; | |
5120 | if (oline != enclosing) | |
5121 | { | |
5122 | if (bfd_seek (input_bfd, | |
5123 | enclosing->line_filepos, | |
5124 | SEEK_SET) != 0 | |
5125 | || (bfd_read (finfo->linenos, linesz, | |
5126 | enc_count, input_bfd) | |
5127 | != linesz * enc_count)) | |
5128 | return false; | |
5129 | oline = enclosing; | |
5130 | } | |
5131 | ||
5132 | linoff = (aux.x_sym.x_fcnary.x_fcn.x_lnnoptr | |
5133 | - enclosing->line_filepos); | |
5134 | ||
5135 | bfd_coff_swap_lineno_in (input_bfd, | |
5136 | (PTR) (finfo->linenos + linoff), | |
5137 | (PTR) &lin); | |
5138 | if (lin.l_lnno != 0 | |
5139 | || ((bfd_size_type) lin.l_addr.l_symndx | |
5140 | != ((esym | |
5141 | - isymesz | |
5142 | - ((bfd_byte *) | |
5143 | obj_coff_external_syms (input_bfd))) | |
5144 | / isymesz))) | |
5145 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0; | |
5146 | else | |
5147 | { | |
5148 | bfd_byte *linpend, *linp; | |
5149 | bfd_vma offset; | |
5150 | bfd_size_type count; | |
5151 | ||
5152 | lin.l_addr.l_symndx = *indexp; | |
5153 | bfd_coff_swap_lineno_out (output_bfd, (PTR) &lin, | |
5154 | (PTR) (finfo->linenos | |
5155 | + linoff)); | |
5156 | ||
5157 | linpend = (finfo->linenos | |
5158 | + enc_count * linesz); | |
5159 | offset = (o->output_section->vma | |
5160 | + o->output_offset | |
5161 | - o->vma); | |
5162 | for (linp = finfo->linenos + linoff + linesz; | |
5163 | linp < linpend; | |
5164 | linp += linesz) | |
5165 | { | |
5166 | bfd_coff_swap_lineno_in (input_bfd, (PTR) linp, | |
5167 | (PTR) &lin); | |
5168 | if (lin.l_lnno == 0) | |
5169 | break; | |
5170 | lin.l_addr.l_paddr += offset; | |
5171 | bfd_coff_swap_lineno_out (output_bfd, | |
5172 | (PTR) &lin, | |
5173 | (PTR) linp); | |
5174 | } | |
5175 | ||
5176 | count = (linp - (finfo->linenos + linoff)) / linesz; | |
5177 | ||
5178 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = | |
5179 | (o->output_section->line_filepos | |
5180 | + o->output_section->lineno_count * linesz); | |
5181 | ||
5182 | if (bfd_seek (output_bfd, | |
5183 | aux.x_sym.x_fcnary.x_fcn.x_lnnoptr, | |
5184 | SEEK_SET) != 0 | |
5185 | || (bfd_write (finfo->linenos + linoff, | |
5186 | linesz, count, output_bfd) | |
5187 | != linesz * count)) | |
5188 | return false; | |
5189 | ||
5190 | o->output_section->lineno_count += count; | |
5191 | ||
5192 | if (incls > 0) | |
5193 | { | |
5194 | struct internal_syment *iisp, *iispend; | |
5195 | long *iindp; | |
5196 | bfd_byte *oos; | |
5197 | int iiadd; | |
5198 | ||
5199 | /* Update any C_BINCL or C_EINCL symbols | |
5200 | that refer to a line number in the | |
5201 | range we just output. */ | |
5202 | iisp = finfo->internal_syms; | |
5203 | iispend = (iisp | |
5204 | + obj_raw_syment_count (input_bfd)); | |
5205 | iindp = finfo->sym_indices; | |
5206 | oos = finfo->outsyms; | |
5207 | while (iisp < iispend) | |
5208 | { | |
5209 | if (*iindp >= 0 | |
5210 | && (iisp->n_sclass == C_BINCL | |
5211 | || iisp->n_sclass == C_EINCL) | |
5212 | && ((bfd_size_type) iisp->n_value | |
5213 | >= enclosing->line_filepos + linoff) | |
5214 | && ((bfd_size_type) iisp->n_value | |
5215 | < (enclosing->line_filepos | |
5216 | + enc_count * linesz))) | |
5217 | { | |
5218 | struct internal_syment iis; | |
5219 | ||
5220 | bfd_coff_swap_sym_in (output_bfd, | |
5221 | (PTR) oos, | |
5222 | (PTR) &iis); | |
5223 | iis.n_value = | |
5224 | (iisp->n_value | |
5225 | - enclosing->line_filepos | |
5226 | - linoff | |
5227 | + aux.x_sym.x_fcnary.x_fcn.x_lnnoptr); | |
5228 | bfd_coff_swap_sym_out (output_bfd, | |
5229 | (PTR) &iis, | |
5230 | (PTR) oos); | |
5231 | --incls; | |
5232 | } | |
5233 | ||
5234 | iiadd = 1 + iisp->n_numaux; | |
5235 | if (*iindp >= 0) | |
5236 | oos += iiadd * osymesz; | |
5237 | iisp += iiadd; | |
5238 | iindp += iiadd; | |
5239 | } | |
5240 | } | |
5241 | } | |
5242 | } | |
5243 | } | |
5244 | ||
5245 | bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, isymp->n_type, | |
5246 | isymp->n_sclass, i, isymp->n_numaux, | |
5247 | (PTR) outsym); | |
5248 | outsym += osymesz; | |
5249 | esym += isymesz; | |
5250 | } | |
5251 | } | |
5252 | ||
5253 | indexp += add; | |
5254 | isymp += add; | |
5255 | csectpp += add; | |
5256 | } | |
5257 | ||
5258 | /* If we swapped out a C_FILE symbol, guess that the next C_FILE | |
5259 | symbol will be the first symbol in the next input file. In the | |
5260 | normal case, this will save us from writing out the C_FILE symbol | |
5261 | again. */ | |
5262 | if (finfo->last_file_index != -1 | |
5263 | && (bfd_size_type) finfo->last_file_index >= syment_base) | |
5264 | { | |
5265 | finfo->last_file.n_value = output_index; | |
5266 | bfd_coff_swap_sym_out (output_bfd, (PTR) &finfo->last_file, | |
5267 | (PTR) (finfo->outsyms | |
5268 | + ((finfo->last_file_index - syment_base) | |
5269 | * osymesz))); | |
5270 | } | |
5271 | ||
5272 | /* Write the modified symbols to the output file. */ | |
5273 | if (outsym > finfo->outsyms) | |
5274 | { | |
5275 | if (bfd_seek (output_bfd, | |
5276 | obj_sym_filepos (output_bfd) + syment_base * osymesz, | |
5277 | SEEK_SET) != 0 | |
5278 | || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, | |
5279 | output_bfd) | |
5280 | != (bfd_size_type) (outsym - finfo->outsyms))) | |
5281 | return false; | |
5282 | ||
5283 | BFD_ASSERT ((obj_raw_syment_count (output_bfd) | |
5284 | + (outsym - finfo->outsyms) / osymesz) | |
5285 | == output_index); | |
5286 | ||
5287 | obj_raw_syment_count (output_bfd) = output_index; | |
5288 | } | |
5289 | ||
5290 | /* Don't let the linker relocation routines discard the symbols. */ | |
5291 | keep_syms = obj_coff_keep_syms (input_bfd); | |
5292 | obj_coff_keep_syms (input_bfd) = true; | |
5293 | ||
5294 | /* Relocate the contents of each section. */ | |
5295 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
5296 | { | |
5297 | bfd_byte *contents; | |
5298 | ||
5299 | if (! o->linker_mark) | |
5300 | { | |
5301 | /* This section was omitted from the link. */ | |
5302 | continue; | |
5303 | } | |
5304 | ||
5305 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
5306 | || o->_raw_size == 0 | |
5307 | || (o->flags & SEC_IN_MEMORY) != 0) | |
5308 | continue; | |
5309 | ||
5310 | /* We have set filepos correctly for the sections we created to | |
5311 | represent csects, so bfd_get_section_contents should work. */ | |
5312 | if (coff_section_data (input_bfd, o) != NULL | |
5313 | && coff_section_data (input_bfd, o)->contents != NULL) | |
5314 | contents = coff_section_data (input_bfd, o)->contents; | |
5315 | else | |
5316 | { | |
5317 | if (! bfd_get_section_contents (input_bfd, o, finfo->contents, | |
5318 | (file_ptr) 0, o->_raw_size)) | |
5319 | return false; | |
5320 | contents = finfo->contents; | |
5321 | } | |
5322 | ||
5323 | if ((o->flags & SEC_RELOC) != 0) | |
5324 | { | |
5325 | int target_index; | |
5326 | struct internal_reloc *internal_relocs; | |
5327 | struct internal_reloc *irel; | |
5328 | bfd_vma offset; | |
5329 | struct internal_reloc *irelend; | |
5330 | struct xcoff_link_hash_entry **rel_hash; | |
5331 | long r_symndx; | |
5332 | ||
5333 | /* Read in the relocs. */ | |
5334 | target_index = o->output_section->target_index; | |
5335 | internal_relocs = (xcoff_read_internal_relocs | |
5336 | (input_bfd, o, false, finfo->external_relocs, | |
5337 | true, | |
5338 | (finfo->section_info[target_index].relocs | |
5339 | + o->output_section->reloc_count))); | |
5340 | if (internal_relocs == NULL) | |
5341 | return false; | |
5342 | ||
5343 | /* Call processor specific code to relocate the section | |
5344 | contents. */ | |
5345 | if (! bfd_coff_relocate_section (output_bfd, finfo->info, | |
5346 | input_bfd, o, | |
5347 | contents, | |
5348 | internal_relocs, | |
5349 | finfo->internal_syms, | |
5350 | xcoff_data (input_bfd)->csects)) | |
5351 | return false; | |
5352 | ||
5353 | offset = o->output_section->vma + o->output_offset - o->vma; | |
5354 | irel = internal_relocs; | |
5355 | irelend = irel + o->reloc_count; | |
5356 | rel_hash = (finfo->section_info[target_index].rel_hashes | |
5357 | + o->output_section->reloc_count); | |
5358 | for (; irel < irelend; irel++, rel_hash++) | |
5359 | { | |
5360 | struct xcoff_link_hash_entry *h = NULL; | |
5361 | struct internal_ldrel ldrel; | |
5362 | boolean quiet; | |
5363 | ||
5364 | *rel_hash = NULL; | |
5365 | ||
5366 | /* Adjust the reloc address and symbol index. */ | |
5367 | ||
5368 | irel->r_vaddr += offset; | |
5369 | ||
5370 | r_symndx = irel->r_symndx; | |
5371 | ||
5372 | if (r_symndx == -1) | |
5373 | h = NULL; | |
5374 | else | |
5375 | h = obj_xcoff_sym_hashes (input_bfd)[r_symndx]; | |
5376 | ||
5377 | if (r_symndx != -1 && finfo->info->strip != strip_all) | |
5378 | { | |
5379 | if (h != NULL | |
5380 | && h->smclas != XMC_TD | |
5381 | && (irel->r_type == R_TOC | |
5382 | || irel->r_type == R_GL | |
5383 | || irel->r_type == R_TCL | |
5384 | || irel->r_type == R_TRL | |
5385 | || irel->r_type == R_TRLA)) | |
5386 | { | |
5387 | /* This is a TOC relative reloc with a symbol | |
5388 | attached. The symbol should be the one which | |
5389 | this reloc is for. We want to make this | |
5390 | reloc against the TOC address of the symbol, | |
5391 | not the symbol itself. */ | |
5392 | BFD_ASSERT (h->toc_section != NULL); | |
5393 | BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0); | |
5394 | if (h->u.toc_indx != -1) | |
5395 | irel->r_symndx = h->u.toc_indx; | |
5396 | else | |
5397 | { | |
5398 | struct xcoff_toc_rel_hash *n; | |
5399 | struct xcoff_link_section_info *si; | |
5400 | ||
5401 | n = ((struct xcoff_toc_rel_hash *) | |
5402 | bfd_alloc (finfo->output_bfd, | |
5403 | sizeof (struct xcoff_toc_rel_hash))); | |
5404 | if (n == NULL) | |
5405 | return false; | |
5406 | si = finfo->section_info + target_index; | |
5407 | n->next = si->toc_rel_hashes; | |
5408 | n->h = h; | |
5409 | n->rel = irel; | |
5410 | si->toc_rel_hashes = n; | |
5411 | } | |
5412 | } | |
5413 | else if (h != NULL) | |
5414 | { | |
5415 | /* This is a global symbol. */ | |
5416 | if (h->indx >= 0) | |
5417 | irel->r_symndx = h->indx; | |
5418 | else | |
5419 | { | |
5420 | /* This symbol is being written at the end | |
5421 | of the file, and we do not yet know the | |
5422 | symbol index. We save the pointer to the | |
5423 | hash table entry in the rel_hash list. | |
5424 | We set the indx field to -2 to indicate | |
5425 | that this symbol must not be stripped. */ | |
5426 | *rel_hash = h; | |
5427 | h->indx = -2; | |
5428 | } | |
5429 | } | |
5430 | else | |
5431 | { | |
5432 | long indx; | |
5433 | ||
5434 | indx = finfo->sym_indices[r_symndx]; | |
5435 | ||
5436 | if (indx == -1) | |
5437 | { | |
5438 | struct internal_syment *is; | |
5439 | ||
5440 | /* Relocations against a TC0 TOC anchor are | |
5441 | automatically transformed to be against | |
5442 | the TOC anchor in the output file. */ | |
5443 | is = finfo->internal_syms + r_symndx; | |
5444 | if (is->n_sclass == C_HIDEXT | |
5445 | && is->n_numaux > 0) | |
5446 | { | |
5447 | PTR auxptr; | |
5448 | union internal_auxent aux; | |
5449 | ||
5450 | auxptr = ((PTR) | |
5451 | (((bfd_byte *) | |
5452 | obj_coff_external_syms (input_bfd)) | |
5453 | + ((r_symndx + is->n_numaux) | |
5454 | * isymesz))); | |
5455 | bfd_coff_swap_aux_in (input_bfd, auxptr, | |
5456 | is->n_type, is->n_sclass, | |
5457 | is->n_numaux - 1, | |
5458 | is->n_numaux, | |
5459 | (PTR) &aux); | |
5460 | if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_SD | |
5461 | && aux.x_csect.x_smclas == XMC_TC0) | |
5462 | indx = finfo->toc_symindx; | |
5463 | } | |
5464 | } | |
5465 | ||
5466 | if (indx != -1) | |
5467 | irel->r_symndx = indx; | |
5468 | else | |
5469 | { | |
5470 | struct internal_syment *is; | |
5471 | const char *name; | |
5472 | char buf[SYMNMLEN + 1]; | |
5473 | ||
5474 | /* This reloc is against a symbol we are | |
5475 | stripping. It would be possible to handle | |
5476 | this case, but I don't think it's worth it. */ | |
5477 | is = finfo->internal_syms + r_symndx; | |
5478 | ||
5479 | name = (_bfd_coff_internal_syment_name | |
5480 | (input_bfd, is, buf)); | |
5481 | if (name == NULL) | |
5482 | return false; | |
5483 | ||
5484 | if (! ((*finfo->info->callbacks->unattached_reloc) | |
5485 | (finfo->info, name, input_bfd, o, | |
5486 | irel->r_vaddr))) | |
5487 | return false; | |
5488 | } | |
5489 | } | |
5490 | } | |
5491 | ||
5492 | quiet = false; | |
5493 | switch (irel->r_type) | |
5494 | { | |
5495 | default: | |
5496 | if (h == NULL | |
5497 | || h->root.type == bfd_link_hash_defined | |
5498 | || h->root.type == bfd_link_hash_defweak | |
5499 | || h->root.type == bfd_link_hash_common) | |
5500 | break; | |
5501 | /* Fall through. */ | |
5502 | case R_POS: | |
5503 | case R_NEG: | |
5504 | case R_RL: | |
5505 | case R_RLA: | |
5506 | /* This reloc needs to be copied into the .loader | |
5507 | section. */ | |
5508 | ldrel.l_vaddr = irel->r_vaddr; | |
5509 | if (r_symndx == -1) | |
5510 | ldrel.l_symndx = -1; | |
5511 | else if (h == NULL | |
5512 | || (h->root.type == bfd_link_hash_defined | |
5513 | || h->root.type == bfd_link_hash_defweak | |
5514 | || h->root.type == bfd_link_hash_common)) | |
5515 | { | |
5516 | asection *sec; | |
5517 | ||
5518 | if (h == NULL) | |
5519 | sec = xcoff_data (input_bfd)->csects[r_symndx]; | |
5520 | else if (h->root.type == bfd_link_hash_common) | |
5521 | sec = h->root.u.c.p->section; | |
5522 | else | |
5523 | sec = h->root.u.def.section; | |
5524 | sec = sec->output_section; | |
5525 | ||
5526 | if (strcmp (sec->name, ".text") == 0) | |
5527 | ldrel.l_symndx = 0; | |
5528 | else if (strcmp (sec->name, ".data") == 0) | |
5529 | ldrel.l_symndx = 1; | |
5530 | else if (strcmp (sec->name, ".bss") == 0) | |
5531 | ldrel.l_symndx = 2; | |
5532 | else | |
5533 | { | |
5534 | (*_bfd_error_handler) | |
5535 | (_("%s: loader reloc in unrecognized section `%s'"), | |
5536 | bfd_get_filename (input_bfd), | |
5537 | sec->name); | |
5538 | bfd_set_error (bfd_error_nonrepresentable_section); | |
5539 | return false; | |
5540 | } | |
5541 | } | |
5542 | else | |
5543 | { | |
5544 | if (! finfo->info->relocateable | |
5545 | && (h->flags & XCOFF_DEF_DYNAMIC) == 0 | |
5546 | && (h->flags & XCOFF_IMPORT) == 0) | |
5547 | { | |
5548 | /* We already called the undefined_symbol | |
5549 | callback for this relocation, in | |
5550 | _bfd_ppc_xcoff_relocate_section. Don't | |
5551 | issue any more warnings. */ | |
5552 | quiet = true; | |
5553 | } | |
5554 | if (h->ldindx < 0 && ! quiet) | |
5555 | { | |
5556 | (*_bfd_error_handler) | |
5557 | (_("%s: `%s' in loader reloc but not loader sym"), | |
5558 | bfd_get_filename (input_bfd), | |
5559 | h->root.root.string); | |
5560 | bfd_set_error (bfd_error_bad_value); | |
5561 | return false; | |
5562 | } | |
5563 | ldrel.l_symndx = h->ldindx; | |
5564 | } | |
5565 | ldrel.l_rtype = (irel->r_size << 8) | irel->r_type; | |
5566 | ldrel.l_rsecnm = o->output_section->target_index; | |
5567 | if (xcoff_hash_table (finfo->info)->textro | |
5568 | && strcmp (o->output_section->name, ".text") == 0 | |
5569 | && ! quiet) | |
5570 | { | |
5571 | (*_bfd_error_handler) | |
5572 | (_("%s: loader reloc in read-only section %s"), | |
5573 | bfd_get_filename (input_bfd), | |
5574 | bfd_get_section_name (finfo->output_bfd, | |
5575 | o->output_section)); | |
5576 | bfd_set_error (bfd_error_invalid_operation); | |
5577 | return false; | |
5578 | } | |
5579 | xcoff_swap_ldrel_out (output_bfd, &ldrel, | |
5580 | finfo->ldrel); | |
5581 | BFD_ASSERT (sizeof (struct external_ldrel) == LDRELSZ); | |
5582 | ++finfo->ldrel; | |
5583 | break; | |
5584 | ||
5585 | case R_TOC: | |
5586 | case R_GL: | |
5587 | case R_TCL: | |
5588 | case R_TRL: | |
5589 | case R_TRLA: | |
5590 | /* We should never need a .loader reloc for a TOC | |
5591 | relative reloc. */ | |
5592 | break; | |
5593 | } | |
5594 | } | |
5595 | ||
5596 | o->output_section->reloc_count += o->reloc_count; | |
5597 | } | |
5598 | ||
5599 | /* Write out the modified section contents. */ | |
5600 | if (! bfd_set_section_contents (output_bfd, o->output_section, | |
5601 | contents, o->output_offset, | |
5602 | (o->_cooked_size != 0 | |
5603 | ? o->_cooked_size | |
5604 | : o->_raw_size))) | |
5605 | return false; | |
5606 | } | |
5607 | ||
5608 | obj_coff_keep_syms (input_bfd) = keep_syms; | |
5609 | ||
5610 | if (! finfo->info->keep_memory) | |
5611 | { | |
5612 | if (! _bfd_coff_free_symbols (input_bfd)) | |
5613 | return false; | |
5614 | } | |
5615 | ||
5616 | return true; | |
5617 | } | |
5618 | ||
5619 | #undef N_TMASK | |
5620 | #undef N_BTSHFT | |
5621 | ||
5622 | /* Write out a non-XCOFF global symbol. */ | |
5623 | ||
5624 | static boolean | |
5625 | xcoff_write_global_symbol (h, p) | |
5626 | struct xcoff_link_hash_entry *h; | |
5627 | PTR p; | |
5628 | { | |
5629 | struct xcoff_final_link_info *finfo = (struct xcoff_final_link_info *) p; | |
5630 | bfd *output_bfd; | |
5631 | bfd_byte *outsym; | |
5632 | struct internal_syment isym; | |
5633 | union internal_auxent aux; | |
5634 | ||
5635 | output_bfd = finfo->output_bfd; | |
5636 | outsym = finfo->outsyms; | |
5637 | ||
5638 | /* If this symbol was garbage collected, just skip it. */ | |
5639 | if (xcoff_hash_table (finfo->info)->gc | |
5640 | && (h->flags & XCOFF_MARK) == 0) | |
5641 | return true; | |
5642 | ||
5643 | /* If we need a .loader section entry, write it out. */ | |
5644 | if (h->ldsym != NULL) | |
5645 | { | |
5646 | struct internal_ldsym *ldsym; | |
5647 | bfd *impbfd; | |
5648 | ||
5649 | ldsym = h->ldsym; | |
5650 | ||
5651 | if (h->root.type == bfd_link_hash_undefined | |
5652 | || h->root.type == bfd_link_hash_undefweak) | |
5653 | { | |
5654 | ldsym->l_value = 0; | |
5655 | ldsym->l_scnum = N_UNDEF; | |
5656 | ldsym->l_smtype = XTY_ER; | |
5657 | impbfd = h->root.u.undef.abfd; | |
5658 | } | |
5659 | else if (h->root.type == bfd_link_hash_defined | |
5660 | || h->root.type == bfd_link_hash_defweak) | |
5661 | { | |
5662 | asection *sec; | |
5663 | ||
5664 | sec = h->root.u.def.section; | |
5665 | ldsym->l_value = (sec->output_section->vma | |
5666 | + sec->output_offset | |
5667 | + h->root.u.def.value); | |
5668 | ldsym->l_scnum = sec->output_section->target_index; | |
5669 | ldsym->l_smtype = XTY_SD; | |
5670 | impbfd = sec->owner; | |
5671 | } | |
5672 | else | |
5673 | abort (); | |
5674 | ||
5675 | if (((h->flags & XCOFF_DEF_REGULAR) == 0 | |
5676 | && (h->flags & XCOFF_DEF_DYNAMIC) != 0) | |
5677 | || (h->flags & XCOFF_IMPORT) != 0) | |
5678 | ldsym->l_smtype |= L_IMPORT; | |
5679 | if (((h->flags & XCOFF_DEF_REGULAR) != 0 | |
5680 | && (h->flags & XCOFF_DEF_DYNAMIC) != 0) | |
5681 | || (h->flags & XCOFF_EXPORT) != 0) | |
5682 | ldsym->l_smtype |= L_EXPORT; | |
5683 | if ((h->flags & XCOFF_ENTRY) != 0) | |
5684 | ldsym->l_smtype |= L_ENTRY; | |
5685 | ||
5686 | ldsym->l_smclas = h->smclas; | |
5687 | ||
5688 | if (ldsym->l_ifile == (bfd_size_type) -1) | |
5689 | ldsym->l_ifile = 0; | |
5690 | else if (ldsym->l_ifile == 0) | |
5691 | { | |
5692 | if ((ldsym->l_smtype & L_IMPORT) == 0) | |
5693 | ldsym->l_ifile = 0; | |
5694 | else if (impbfd == NULL) | |
5695 | ldsym->l_ifile = 0; | |
5696 | else | |
5697 | { | |
5698 | BFD_ASSERT (impbfd->xvec == output_bfd->xvec); | |
5699 | ldsym->l_ifile = xcoff_data (impbfd)->import_file_id; | |
5700 | } | |
5701 | } | |
5702 | ||
5703 | ldsym->l_parm = 0; | |
5704 | ||
5705 | BFD_ASSERT (h->ldindx >= 0); | |
5706 | BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym)); | |
5707 | xcoff_swap_ldsym_out (output_bfd, ldsym, finfo->ldsym + h->ldindx - 3); | |
5708 | h->ldsym = NULL; | |
5709 | } | |
5710 | ||
5711 | /* If this symbol needs global linkage code, write it out. */ | |
5712 | if (h->root.type == bfd_link_hash_defined | |
5713 | && (h->root.u.def.section | |
5714 | == xcoff_hash_table (finfo->info)->linkage_section)) | |
5715 | { | |
5716 | bfd_byte *p; | |
5717 | bfd_vma tocoff; | |
5718 | unsigned int i; | |
5719 | ||
5720 | p = h->root.u.def.section->contents + h->root.u.def.value; | |
5721 | ||
5722 | /* The first instruction in the global linkage code loads a | |
5723 | specific TOC element. */ | |
5724 | tocoff = (h->descriptor->toc_section->output_section->vma | |
5725 | + h->descriptor->toc_section->output_offset | |
5726 | - xcoff_data (output_bfd)->toc); | |
5727 | if ((h->descriptor->flags & XCOFF_SET_TOC) != 0) | |
5728 | tocoff += h->descriptor->u.toc_offset; | |
5729 | bfd_put_32 (output_bfd, XCOFF_GLINK_FIRST | (tocoff & 0xffff), p); | |
5730 | for (i = 0, p += 4; | |
5731 | i < sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]; | |
5732 | i++, p += 4) | |
5733 | bfd_put_32 (output_bfd, xcoff_glink_code[i], p); | |
5734 | } | |
5735 | ||
5736 | /* If we created a TOC entry for this symbol, write out the required | |
5737 | relocs. */ | |
5738 | if ((h->flags & XCOFF_SET_TOC) != 0) | |
5739 | { | |
5740 | asection *tocsec; | |
5741 | asection *osec; | |
5742 | int oindx; | |
5743 | struct internal_reloc *irel; | |
5744 | struct internal_ldrel ldrel; | |
5745 | struct internal_syment irsym; | |
5746 | union internal_auxent iraux; | |
5747 | ||
5748 | tocsec = h->toc_section; | |
5749 | osec = tocsec->output_section; | |
5750 | oindx = osec->target_index; | |
5751 | irel = finfo->section_info[oindx].relocs + osec->reloc_count; | |
5752 | irel->r_vaddr = (osec->vma | |
5753 | + tocsec->output_offset | |
5754 | + h->u.toc_offset); | |
5755 | if (h->indx >= 0) | |
5756 | irel->r_symndx = h->indx; | |
5757 | else | |
5758 | { | |
5759 | h->indx = -2; | |
5760 | irel->r_symndx = obj_raw_syment_count (output_bfd); | |
5761 | } | |
5762 | irel->r_type = R_POS; | |
5763 | irel->r_size = 31; | |
5764 | finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL; | |
5765 | ++osec->reloc_count; | |
5766 | ||
5767 | BFD_ASSERT (h->ldindx >= 0); | |
5768 | ldrel.l_vaddr = irel->r_vaddr; | |
5769 | ldrel.l_symndx = h->ldindx; | |
5770 | ldrel.l_rtype = (31 << 8) | R_POS; | |
5771 | ldrel.l_rsecnm = oindx; | |
5772 | xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel); | |
5773 | ++finfo->ldrel; | |
5774 | ||
5775 | /* We need to emit a symbol to define a csect which holds the | |
5776 | reloc. */ | |
5777 | if (finfo->info->strip != strip_all) | |
5778 | { | |
5779 | if (strlen (h->root.root.string) <= SYMNMLEN) | |
5780 | strncpy (irsym._n._n_name, h->root.root.string, SYMNMLEN); | |
5781 | else | |
5782 | { | |
5783 | boolean hash; | |
5784 | bfd_size_type indx; | |
5785 | ||
5786 | hash = true; | |
5787 | if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) | |
5788 | hash = false; | |
5789 | indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, | |
5790 | hash, false); | |
5791 | if (indx == (bfd_size_type) -1) | |
5792 | return false; | |
5793 | irsym._n._n_n._n_zeroes = 0; | |
5794 | irsym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; | |
5795 | } | |
5796 | ||
5797 | irsym.n_value = irel->r_vaddr; | |
5798 | irsym.n_scnum = osec->target_index; | |
5799 | irsym.n_sclass = C_HIDEXT; | |
5800 | irsym.n_type = T_NULL; | |
5801 | irsym.n_numaux = 1; | |
5802 | ||
5803 | bfd_coff_swap_sym_out (output_bfd, (PTR) &irsym, (PTR) outsym); | |
5804 | outsym += bfd_coff_symesz (output_bfd); | |
5805 | ||
5806 | memset (&iraux, 0, sizeof iraux); | |
5807 | iraux.x_csect.x_smtyp = XTY_SD; | |
5808 | iraux.x_csect.x_scnlen.l = 4; | |
5809 | iraux.x_csect.x_smclas = XMC_TC; | |
5810 | ||
5811 | bfd_coff_swap_aux_out (output_bfd, (PTR) &iraux, T_NULL, C_HIDEXT, | |
5812 | 0, 1, (PTR) outsym); | |
5813 | outsym += bfd_coff_auxesz (output_bfd); | |
5814 | ||
5815 | if (h->indx >= 0) | |
5816 | { | |
5817 | /* We aren't going to write out the symbols below, so we | |
5818 | need to write them out now. */ | |
5819 | if (bfd_seek (output_bfd, | |
5820 | (obj_sym_filepos (output_bfd) | |
5821 | + (obj_raw_syment_count (output_bfd) | |
5822 | * bfd_coff_symesz (output_bfd))), | |
5823 | SEEK_SET) != 0 | |
5824 | || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, | |
5825 | output_bfd) | |
5826 | != (bfd_size_type) (outsym - finfo->outsyms))) | |
5827 | return false; | |
5828 | obj_raw_syment_count (output_bfd) += | |
5829 | (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd); | |
5830 | ||
5831 | outsym = finfo->outsyms; | |
5832 | } | |
5833 | } | |
5834 | } | |
5835 | ||
5836 | /* If this symbol is a specially defined function descriptor, write | |
5837 | it out. The first word is the address of the function code | |
5838 | itself, the second word is the address of the TOC, and the third | |
5839 | word is zero. */ | |
5840 | if ((h->flags & XCOFF_DESCRIPTOR) != 0 | |
5841 | && h->root.type == bfd_link_hash_defined | |
5842 | && (h->root.u.def.section | |
5843 | == xcoff_hash_table (finfo->info)->descriptor_section)) | |
5844 | { | |
5845 | asection *sec; | |
5846 | asection *osec; | |
5847 | int oindx; | |
5848 | bfd_byte *p; | |
5849 | struct xcoff_link_hash_entry *hentry; | |
5850 | asection *esec; | |
5851 | struct internal_reloc *irel; | |
5852 | struct internal_ldrel ldrel; | |
5853 | asection *tsec; | |
5854 | ||
5855 | sec = h->root.u.def.section; | |
5856 | osec = sec->output_section; | |
5857 | oindx = osec->target_index; | |
5858 | p = sec->contents + h->root.u.def.value; | |
5859 | ||
5860 | hentry = h->descriptor; | |
5861 | BFD_ASSERT (hentry != NULL | |
5862 | && (hentry->root.type == bfd_link_hash_defined | |
5863 | || hentry->root.type == bfd_link_hash_defweak)); | |
5864 | esec = hentry->root.u.def.section; | |
5865 | bfd_put_32 (output_bfd, | |
5866 | (esec->output_section->vma | |
5867 | + esec->output_offset | |
5868 | + hentry->root.u.def.value), | |
5869 | p); | |
5870 | ||
5871 | irel = finfo->section_info[oindx].relocs + osec->reloc_count; | |
5872 | irel->r_vaddr = (osec->vma | |
5873 | + sec->output_offset | |
5874 | + h->root.u.def.value); | |
5875 | irel->r_symndx = esec->output_section->target_index; | |
5876 | irel->r_type = R_POS; | |
5877 | irel->r_size = 31; | |
5878 | finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL; | |
5879 | ++osec->reloc_count; | |
5880 | ||
5881 | ldrel.l_vaddr = irel->r_vaddr; | |
5882 | if (strcmp (esec->output_section->name, ".text") == 0) | |
5883 | ldrel.l_symndx = 0; | |
5884 | else if (strcmp (esec->output_section->name, ".data") == 0) | |
5885 | ldrel.l_symndx = 1; | |
5886 | else if (strcmp (esec->output_section->name, ".bss") == 0) | |
5887 | ldrel.l_symndx = 2; | |
5888 | else | |
5889 | { | |
5890 | (*_bfd_error_handler) | |
5891 | (_("%s: loader reloc in unrecognized section `%s'"), | |
5892 | bfd_get_filename (output_bfd), | |
5893 | esec->output_section->name); | |
5894 | bfd_set_error (bfd_error_nonrepresentable_section); | |
5895 | return false; | |
5896 | } | |
5897 | ldrel.l_rtype = (31 << 8) | R_POS; | |
5898 | ldrel.l_rsecnm = oindx; | |
5899 | xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel); | |
5900 | ++finfo->ldrel; | |
5901 | ||
5902 | bfd_put_32 (output_bfd, xcoff_data (output_bfd)->toc, p + 4); | |
5903 | ||
5904 | tsec = coff_section_from_bfd_index (output_bfd, | |
5905 | xcoff_data (output_bfd)->sntoc); | |
5906 | ||
5907 | ++irel; | |
5908 | irel->r_vaddr = (osec->vma | |
5909 | + sec->output_offset | |
5910 | + h->root.u.def.value | |
5911 | + 4); | |
5912 | irel->r_symndx = tsec->output_section->target_index; | |
5913 | irel->r_type = R_POS; | |
5914 | irel->r_size = 31; | |
5915 | finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL; | |
5916 | ++osec->reloc_count; | |
5917 | ||
5918 | ldrel.l_vaddr = irel->r_vaddr; | |
5919 | if (strcmp (tsec->output_section->name, ".text") == 0) | |
5920 | ldrel.l_symndx = 0; | |
5921 | else if (strcmp (tsec->output_section->name, ".data") == 0) | |
5922 | ldrel.l_symndx = 1; | |
5923 | else if (strcmp (tsec->output_section->name, ".bss") == 0) | |
5924 | ldrel.l_symndx = 2; | |
5925 | else | |
5926 | { | |
5927 | (*_bfd_error_handler) | |
5928 | (_("%s: loader reloc in unrecognized section `%s'"), | |
5929 | bfd_get_filename (output_bfd), | |
5930 | tsec->output_section->name); | |
5931 | bfd_set_error (bfd_error_nonrepresentable_section); | |
5932 | return false; | |
5933 | } | |
5934 | ldrel.l_rtype = (31 << 8) | R_POS; | |
5935 | ldrel.l_rsecnm = oindx; | |
5936 | xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel); | |
5937 | ++finfo->ldrel; | |
5938 | } | |
5939 | ||
5940 | if (h->indx >= 0 || finfo->info->strip == strip_all) | |
5941 | { | |
5942 | BFD_ASSERT (outsym == finfo->outsyms); | |
5943 | return true; | |
5944 | } | |
5945 | ||
5946 | if (h->indx != -2 | |
5947 | && (finfo->info->strip == strip_all | |
5948 | || (finfo->info->strip == strip_some | |
5949 | && (bfd_hash_lookup (finfo->info->keep_hash, | |
5950 | h->root.root.string, false, false) | |
5951 | == NULL)))) | |
5952 | { | |
5953 | BFD_ASSERT (outsym == finfo->outsyms); | |
5954 | return true; | |
5955 | } | |
5956 | ||
5957 | if (h->indx != -2 | |
5958 | && (h->flags & (XCOFF_REF_REGULAR | XCOFF_DEF_REGULAR)) == 0) | |
5959 | { | |
5960 | BFD_ASSERT (outsym == finfo->outsyms); | |
5961 | return true; | |
5962 | } | |
5963 | ||
5964 | memset (&aux, 0, sizeof aux); | |
5965 | ||
5966 | h->indx = obj_raw_syment_count (output_bfd); | |
5967 | ||
5968 | if (strlen (h->root.root.string) <= SYMNMLEN) | |
5969 | strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN); | |
5970 | else | |
5971 | { | |
5972 | boolean hash; | |
5973 | bfd_size_type indx; | |
5974 | ||
5975 | hash = true; | |
5976 | if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) | |
5977 | hash = false; | |
5978 | indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash, | |
5979 | false); | |
5980 | if (indx == (bfd_size_type) -1) | |
5981 | return false; | |
5982 | isym._n._n_n._n_zeroes = 0; | |
5983 | isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; | |
5984 | } | |
5985 | ||
5986 | if (h->root.type == bfd_link_hash_undefined | |
5987 | || h->root.type == bfd_link_hash_undefweak) | |
5988 | { | |
5989 | isym.n_value = 0; | |
5990 | isym.n_scnum = N_UNDEF; | |
5991 | isym.n_sclass = C_EXT; | |
5992 | aux.x_csect.x_smtyp = XTY_ER; | |
5993 | } | |
5994 | else if ((h->root.type == bfd_link_hash_defined | |
5995 | || h->root.type == bfd_link_hash_defweak) | |
5996 | && h->smclas == XMC_XO) | |
5997 | { | |
5998 | BFD_ASSERT (bfd_is_abs_section (h->root.u.def.section)); | |
5999 | isym.n_value = h->root.u.def.value; | |
6000 | isym.n_scnum = N_UNDEF; | |
6001 | isym.n_sclass = C_EXT; | |
6002 | aux.x_csect.x_smtyp = XTY_ER; | |
6003 | } | |
6004 | else if (h->root.type == bfd_link_hash_defined | |
6005 | || h->root.type == bfd_link_hash_defweak) | |
6006 | { | |
6007 | struct xcoff_link_size_list *l; | |
6008 | ||
6009 | isym.n_value = (h->root.u.def.section->output_section->vma | |
6010 | + h->root.u.def.section->output_offset | |
6011 | + h->root.u.def.value); | |
6012 | isym.n_scnum = h->root.u.def.section->output_section->target_index; | |
6013 | isym.n_sclass = C_HIDEXT; | |
6014 | aux.x_csect.x_smtyp = XTY_SD; | |
6015 | ||
6016 | if ((h->flags & XCOFF_HAS_SIZE) != 0) | |
6017 | { | |
6018 | for (l = xcoff_hash_table (finfo->info)->size_list; | |
6019 | l != NULL; | |
6020 | l = l->next) | |
6021 | { | |
6022 | if (l->h == h) | |
6023 | { | |
6024 | aux.x_csect.x_scnlen.l = l->size; | |
6025 | break; | |
6026 | } | |
6027 | } | |
6028 | } | |
6029 | } | |
6030 | else if (h->root.type == bfd_link_hash_common) | |
6031 | { | |
6032 | isym.n_value = (h->root.u.c.p->section->output_section->vma | |
6033 | + h->root.u.c.p->section->output_offset); | |
6034 | isym.n_scnum = h->root.u.c.p->section->output_section->target_index; | |
6035 | isym.n_sclass = C_EXT; | |
6036 | aux.x_csect.x_smtyp = XTY_CM; | |
6037 | aux.x_csect.x_scnlen.l = h->root.u.c.size; | |
6038 | } | |
6039 | else | |
6040 | abort (); | |
6041 | ||
6042 | isym.n_type = T_NULL; | |
6043 | isym.n_numaux = 1; | |
6044 | ||
6045 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); | |
6046 | outsym += bfd_coff_symesz (output_bfd); | |
6047 | ||
6048 | aux.x_csect.x_smclas = h->smclas; | |
6049 | ||
6050 | bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, isym.n_sclass, 0, 1, | |
6051 | (PTR) outsym); | |
6052 | outsym += bfd_coff_auxesz (output_bfd); | |
6053 | ||
6054 | if ((h->root.type == bfd_link_hash_defined | |
6055 | || h->root.type == bfd_link_hash_defweak) | |
6056 | && h->smclas != XMC_XO) | |
6057 | { | |
6058 | /* We just output an SD symbol. Now output an LD symbol. */ | |
6059 | ||
6060 | h->indx += 2; | |
6061 | ||
6062 | isym.n_sclass = C_EXT; | |
6063 | bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); | |
6064 | outsym += bfd_coff_symesz (output_bfd); | |
6065 | ||
6066 | aux.x_csect.x_smtyp = XTY_LD; | |
6067 | aux.x_csect.x_scnlen.l = obj_raw_syment_count (output_bfd); | |
6068 | ||
6069 | bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, C_EXT, 0, 1, | |
6070 | (PTR) outsym); | |
6071 | outsym += bfd_coff_auxesz (output_bfd); | |
6072 | } | |
6073 | ||
6074 | if (bfd_seek (output_bfd, | |
6075 | (obj_sym_filepos (output_bfd) | |
6076 | + (obj_raw_syment_count (output_bfd) | |
6077 | * bfd_coff_symesz (output_bfd))), | |
6078 | SEEK_SET) != 0 | |
6079 | || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, output_bfd) | |
6080 | != (bfd_size_type) (outsym - finfo->outsyms))) | |
6081 | return false; | |
6082 | obj_raw_syment_count (output_bfd) += | |
6083 | (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd); | |
6084 | ||
6085 | return true; | |
6086 | } | |
6087 | ||
6088 | /* Handle a link order which is supposed to generate a reloc. */ | |
6089 | ||
6090 | static boolean | |
6091 | xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order) | |
6092 | bfd *output_bfd; | |
6093 | struct xcoff_final_link_info *finfo; | |
6094 | asection *output_section; | |
6095 | struct bfd_link_order *link_order; | |
6096 | { | |
6097 | reloc_howto_type *howto; | |
6098 | struct xcoff_link_hash_entry *h; | |
6099 | asection *hsec; | |
6100 | bfd_vma hval; | |
6101 | bfd_vma addend; | |
6102 | struct internal_reloc *irel; | |
6103 | struct xcoff_link_hash_entry **rel_hash_ptr; | |
6104 | struct internal_ldrel ldrel; | |
6105 | ||
6106 | if (link_order->type == bfd_section_reloc_link_order) | |
6107 | { | |
6108 | /* We need to somehow locate a symbol in the right section. The | |
6109 | symbol must either have a value of zero, or we must adjust | |
6110 | the addend by the value of the symbol. FIXME: Write this | |
6111 | when we need it. The old linker couldn't handle this anyhow. */ | |
6112 | abort (); | |
6113 | } | |
6114 | ||
6115 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
6116 | if (howto == NULL) | |
6117 | { | |
6118 | bfd_set_error (bfd_error_bad_value); | |
6119 | return false; | |
6120 | } | |
6121 | ||
6122 | h = ((struct xcoff_link_hash_entry *) | |
6123 | bfd_wrapped_link_hash_lookup (output_bfd, finfo->info, | |
6124 | link_order->u.reloc.p->u.name, | |
6125 | false, false, true)); | |
6126 | if (h == NULL) | |
6127 | { | |
6128 | if (! ((*finfo->info->callbacks->unattached_reloc) | |
6129 | (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
6130 | (asection *) NULL, (bfd_vma) 0))) | |
6131 | return false; | |
6132 | return true; | |
6133 | } | |
6134 | ||
6135 | if (h->root.type == bfd_link_hash_common) | |
6136 | { | |
6137 | hsec = h->root.u.c.p->section; | |
6138 | hval = 0; | |
6139 | } | |
6140 | else if (h->root.type == bfd_link_hash_defined | |
6141 | || h->root.type == bfd_link_hash_defweak) | |
6142 | { | |
6143 | hsec = h->root.u.def.section; | |
6144 | hval = h->root.u.def.value; | |
6145 | } | |
6146 | else | |
6147 | { | |
6148 | hsec = NULL; | |
6149 | hval = 0; | |
6150 | } | |
6151 | ||
6152 | addend = link_order->u.reloc.p->addend; | |
6153 | if (hsec != NULL) | |
6154 | addend += (hsec->output_section->vma | |
6155 | + hsec->output_offset | |
6156 | + hval); | |
6157 | ||
6158 | if (addend != 0) | |
6159 | { | |
6160 | bfd_size_type size; | |
6161 | bfd_byte *buf; | |
6162 | bfd_reloc_status_type rstat; | |
6163 | boolean ok; | |
6164 | ||
6165 | size = bfd_get_reloc_size (howto); | |
6166 | buf = (bfd_byte *) bfd_zmalloc (size); | |
6167 | if (buf == NULL) | |
6168 | return false; | |
6169 | ||
6170 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); | |
6171 | switch (rstat) | |
6172 | { | |
6173 | case bfd_reloc_ok: | |
6174 | break; | |
6175 | default: | |
6176 | case bfd_reloc_outofrange: | |
6177 | abort (); | |
6178 | case bfd_reloc_overflow: | |
6179 | if (! ((*finfo->info->callbacks->reloc_overflow) | |
6180 | (finfo->info, link_order->u.reloc.p->u.name, | |
6181 | howto->name, addend, (bfd *) NULL, (asection *) NULL, | |
6182 | (bfd_vma) 0))) | |
6183 | { | |
6184 | free (buf); | |
6185 | return false; | |
6186 | } | |
6187 | break; | |
6188 | } | |
6189 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
6190 | (file_ptr) link_order->offset, size); | |
6191 | free (buf); | |
6192 | if (! ok) | |
6193 | return false; | |
6194 | } | |
6195 | ||
6196 | /* Store the reloc information in the right place. It will get | |
6197 | swapped and written out at the end of the final_link routine. */ | |
6198 | ||
6199 | irel = (finfo->section_info[output_section->target_index].relocs | |
6200 | + output_section->reloc_count); | |
6201 | rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes | |
6202 | + output_section->reloc_count); | |
6203 | ||
6204 | memset (irel, 0, sizeof (struct internal_reloc)); | |
6205 | *rel_hash_ptr = NULL; | |
6206 | ||
6207 | irel->r_vaddr = output_section->vma + link_order->offset; | |
6208 | ||
6209 | if (h->indx >= 0) | |
6210 | irel->r_symndx = h->indx; | |
6211 | else | |
6212 | { | |
6213 | /* Set the index to -2 to force this symbol to get written out. */ | |
6214 | h->indx = -2; | |
6215 | *rel_hash_ptr = h; | |
6216 | irel->r_symndx = 0; | |
6217 | } | |
6218 | ||
6219 | irel->r_type = howto->type; | |
6220 | irel->r_size = howto->bitsize - 1; | |
6221 | if (howto->complain_on_overflow == complain_overflow_signed) | |
6222 | irel->r_size |= 0x80; | |
6223 | ||
6224 | ++output_section->reloc_count; | |
6225 | ||
6226 | /* Now output the reloc to the .loader section. */ | |
6227 | ||
6228 | ldrel.l_vaddr = irel->r_vaddr; | |
6229 | ||
6230 | if (hsec != NULL) | |
6231 | { | |
6232 | const char *secname; | |
6233 | ||
6234 | secname = hsec->output_section->name; | |
6235 | ||
6236 | if (strcmp (secname, ".text") == 0) | |
6237 | ldrel.l_symndx = 0; | |
6238 | else if (strcmp (secname, ".data") == 0) | |
6239 | ldrel.l_symndx = 1; | |
6240 | else if (strcmp (secname, ".bss") == 0) | |
6241 | ldrel.l_symndx = 2; | |
6242 | else | |
6243 | { | |
6244 | (*_bfd_error_handler) | |
6245 | (_("%s: loader reloc in unrecognized section `%s'"), | |
6246 | bfd_get_filename (output_bfd), secname); | |
6247 | bfd_set_error (bfd_error_nonrepresentable_section); | |
6248 | return false; | |
6249 | } | |
6250 | } | |
6251 | else | |
6252 | { | |
6253 | if (h->ldindx < 0) | |
6254 | { | |
6255 | (*_bfd_error_handler) | |
6256 | (_("%s: `%s' in loader reloc but not loader sym"), | |
6257 | bfd_get_filename (output_bfd), | |
6258 | h->root.root.string); | |
6259 | bfd_set_error (bfd_error_bad_value); | |
6260 | return false; | |
6261 | } | |
6262 | ldrel.l_symndx = h->ldindx; | |
6263 | } | |
6264 | ||
6265 | ldrel.l_rtype = (irel->r_size << 8) | irel->r_type; | |
6266 | ldrel.l_rsecnm = output_section->target_index; | |
6267 | xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel); | |
6268 | ++finfo->ldrel; | |
6269 | ||
6270 | return true; | |
6271 | } | |
6272 | ||
6273 | /* Sort relocs by VMA. This is called via qsort. */ | |
6274 | ||
6275 | static int | |
6276 | xcoff_sort_relocs (p1, p2) | |
6277 | const PTR p1; | |
6278 | const PTR p2; | |
6279 | { | |
6280 | const struct internal_reloc *r1 = (const struct internal_reloc *) p1; | |
6281 | const struct internal_reloc *r2 = (const struct internal_reloc *) p2; | |
6282 | ||
6283 | if (r1->r_vaddr > r2->r_vaddr) | |
6284 | return 1; | |
6285 | else if (r1->r_vaddr < r2->r_vaddr) | |
6286 | return -1; | |
6287 | else | |
6288 | return 0; | |
6289 | } | |
6290 | ||
6291 | /* This is the relocation function for the RS/6000/POWER/PowerPC. | |
6292 | This is currently the only processor which uses XCOFF; I hope that | |
6293 | will never change. */ | |
6294 | ||
6295 | boolean | |
6296 | _bfd_ppc_xcoff_relocate_section (output_bfd, info, input_bfd, | |
6297 | input_section, contents, relocs, syms, | |
6298 | sections) | |
6299 | bfd *output_bfd; | |
6300 | struct bfd_link_info *info; | |
6301 | bfd *input_bfd; | |
6302 | asection *input_section; | |
6303 | bfd_byte *contents; | |
6304 | struct internal_reloc *relocs; | |
6305 | struct internal_syment *syms; | |
6306 | asection **sections; | |
6307 | { | |
6308 | struct internal_reloc *rel; | |
6309 | struct internal_reloc *relend; | |
6310 | ||
6311 | rel = relocs; | |
6312 | relend = rel + input_section->reloc_count; | |
6313 | for (; rel < relend; rel++) | |
6314 | { | |
6315 | long symndx; | |
6316 | struct xcoff_link_hash_entry *h; | |
6317 | struct internal_syment *sym; | |
6318 | bfd_vma addend; | |
6319 | bfd_vma val; | |
6320 | struct reloc_howto_struct howto; | |
6321 | bfd_reloc_status_type rstat; | |
6322 | ||
6323 | /* Relocation type R_REF is a special relocation type which is | |
6324 | merely used to prevent garbage collection from occurring for | |
6325 | the csect including the symbol which it references. */ | |
6326 | if (rel->r_type == R_REF) | |
6327 | continue; | |
6328 | ||
6329 | symndx = rel->r_symndx; | |
6330 | ||
6331 | if (symndx == -1) | |
6332 | { | |
6333 | h = NULL; | |
6334 | sym = NULL; | |
6335 | addend = 0; | |
6336 | } | |
6337 | else | |
6338 | { | |
6339 | h = obj_xcoff_sym_hashes (input_bfd)[symndx]; | |
6340 | sym = syms + symndx; | |
6341 | addend = - sym->n_value; | |
6342 | } | |
6343 | ||
6344 | /* We build the howto information on the fly. */ | |
6345 | ||
6346 | howto.type = rel->r_type; | |
6347 | howto.rightshift = 0; | |
6348 | howto.size = 2; | |
6349 | howto.bitsize = (rel->r_size & 0x1f) + 1; | |
6350 | howto.pc_relative = false; | |
6351 | howto.bitpos = 0; | |
6352 | if ((rel->r_size & 0x80) != 0) | |
6353 | howto.complain_on_overflow = complain_overflow_signed; | |
6354 | else | |
6355 | howto.complain_on_overflow = complain_overflow_bitfield; | |
6356 | howto.special_function = NULL; | |
6357 | howto.name = "internal"; | |
6358 | howto.partial_inplace = true; | |
6359 | if (howto.bitsize == 32) | |
6360 | howto.src_mask = howto.dst_mask = 0xffffffff; | |
6361 | else | |
6362 | { | |
6363 | howto.src_mask = howto.dst_mask = (1 << howto.bitsize) - 1; | |
6364 | if (howto.bitsize == 16) | |
6365 | howto.size = 1; | |
6366 | } | |
6367 | howto.pcrel_offset = false; | |
6368 | ||
6369 | val = 0; | |
6370 | ||
6371 | if (h == NULL) | |
6372 | { | |
6373 | asection *sec; | |
6374 | ||
6375 | if (symndx == -1) | |
6376 | { | |
6377 | sec = bfd_abs_section_ptr; | |
6378 | val = 0; | |
6379 | } | |
6380 | else | |
6381 | { | |
6382 | sec = sections[symndx]; | |
6383 | /* Hack to make sure we use the right TOC anchor value | |
6384 | if this reloc is against the TOC anchor. */ | |
6385 | if (sec->name[3] == '0' | |
6386 | && strcmp (sec->name, ".tc0") == 0) | |
6387 | val = xcoff_data (output_bfd)->toc; | |
6388 | else | |
6389 | val = (sec->output_section->vma | |
6390 | + sec->output_offset | |
6391 | + sym->n_value | |
6392 | - sec->vma); | |
6393 | } | |
6394 | } | |
6395 | else | |
6396 | { | |
6397 | if (h->root.type == bfd_link_hash_defined | |
6398 | || h->root.type == bfd_link_hash_defweak) | |
6399 | { | |
6400 | asection *sec; | |
6401 | ||
6402 | sec = h->root.u.def.section; | |
6403 | val = (h->root.u.def.value | |
6404 | + sec->output_section->vma | |
6405 | + sec->output_offset); | |
6406 | } | |
6407 | else if (h->root.type == bfd_link_hash_common) | |
6408 | { | |
6409 | asection *sec; | |
6410 | ||
6411 | sec = h->root.u.c.p->section; | |
6412 | val = (sec->output_section->vma | |
6413 | + sec->output_offset); | |
6414 | } | |
6415 | else if ((h->flags & XCOFF_DEF_DYNAMIC) != 0 | |
6416 | || (h->flags & XCOFF_IMPORT) != 0) | |
6417 | { | |
6418 | /* Every symbol in a shared object is defined somewhere. */ | |
6419 | val = 0; | |
6420 | } | |
6421 | else if (! info->relocateable) | |
6422 | { | |
6423 | if (! ((*info->callbacks->undefined_symbol) | |
6424 | (info, h->root.root.string, input_bfd, input_section, | |
5cc7c785 | 6425 | rel->r_vaddr - input_section->vma, true))) |
252b5132 RH |
6426 | return false; |
6427 | ||
6428 | /* Don't try to process the reloc. It can't help, and | |
6429 | it may generate another error. */ | |
6430 | continue; | |
6431 | } | |
6432 | } | |
6433 | ||
6434 | /* I took the relocation type definitions from two documents: | |
6435 | the PowerPC AIX Version 4 Application Binary Interface, First | |
6436 | Edition (April 1992), and the PowerOpen ABI, Big-Endian | |
6437 | 32-Bit Hardware Implementation (June 30, 1994). Differences | |
6438 | between the documents are noted below. */ | |
6439 | ||
6440 | switch (rel->r_type) | |
6441 | { | |
6442 | case R_RTB: | |
6443 | case R_RRTBI: | |
6444 | case R_RRTBA: | |
6445 | /* These relocs are defined by the PowerPC ABI to be | |
6446 | relative branches which use half of the difference | |
6447 | between the symbol and the program counter. I can't | |
6448 | quite figure out when this is useful. These relocs are | |
6449 | not defined by the PowerOpen ABI. */ | |
6450 | default: | |
6451 | (*_bfd_error_handler) | |
6452 | (_("%s: unsupported relocation type 0x%02x"), | |
6453 | bfd_get_filename (input_bfd), (unsigned int) rel->r_type); | |
6454 | bfd_set_error (bfd_error_bad_value); | |
6455 | return false; | |
6456 | case R_POS: | |
6457 | /* Simple positive relocation. */ | |
6458 | break; | |
6459 | case R_NEG: | |
6460 | /* Simple negative relocation. */ | |
6461 | val = - val; | |
6462 | break; | |
6463 | case R_REL: | |
6464 | /* Simple PC relative relocation. */ | |
6465 | howto.pc_relative = true; | |
6466 | break; | |
6467 | case R_TOC: | |
6468 | /* TOC relative relocation. The value in the instruction in | |
6469 | the input file is the offset from the input file TOC to | |
6470 | the desired location. We want the offset from the final | |
6471 | TOC to the desired location. We have: | |
6472 | isym = iTOC + in | |
6473 | iinsn = in + o | |
6474 | osym = oTOC + on | |
6475 | oinsn = on + o | |
6476 | so we must change insn by on - in. | |
6477 | */ | |
6478 | case R_GL: | |
6479 | /* Global linkage relocation. The value of this relocation | |
6480 | is the address of the entry in the TOC section. */ | |
6481 | case R_TCL: | |
6482 | /* Local object TOC address. I can't figure out the | |
6483 | difference between this and case R_GL. */ | |
6484 | case R_TRL: | |
6485 | /* TOC relative relocation. A TOC relative load instruction | |
6486 | which may be changed to a load address instruction. | |
6487 | FIXME: We don't currently implement this optimization. */ | |
6488 | case R_TRLA: | |
6489 | /* TOC relative relocation. This is a TOC relative load | |
6490 | address instruction which may be changed to a load | |
6491 | instruction. FIXME: I don't know if this is the correct | |
6492 | implementation. */ | |
6493 | if (h != NULL && h->smclas != XMC_TD) | |
6494 | { | |
6495 | if (h->toc_section == NULL) | |
6496 | { | |
6497 | (*_bfd_error_handler) | |
6498 | (_("%s: TOC reloc at 0x%x to symbol `%s' with no TOC entry"), | |
6499 | bfd_get_filename (input_bfd), rel->r_vaddr, | |
6500 | h->root.root.string); | |
6501 | bfd_set_error (bfd_error_bad_value); | |
6502 | return false; | |
6503 | } | |
6504 | ||
6505 | BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0); | |
6506 | val = (h->toc_section->output_section->vma | |
6507 | + h->toc_section->output_offset); | |
6508 | } | |
6509 | ||
6510 | val = ((val - xcoff_data (output_bfd)->toc) | |
6511 | - (sym->n_value - xcoff_data (input_bfd)->toc)); | |
6512 | addend = 0; | |
6513 | break; | |
6514 | case R_BA: | |
6515 | /* Absolute branch. We don't want to mess with the lower | |
6516 | two bits of the instruction. */ | |
6517 | case R_CAI: | |
6518 | /* The PowerPC ABI defines this as an absolute call which | |
6519 | may be modified to become a relative call. The PowerOpen | |
6520 | ABI does not define this relocation type. */ | |
6521 | case R_RBA: | |
6522 | /* Absolute branch which may be modified to become a | |
6523 | relative branch. */ | |
6524 | case R_RBAC: | |
6525 | /* The PowerPC ABI defines this as an absolute branch to a | |
6526 | fixed address which may be modified to an absolute branch | |
6527 | to a symbol. The PowerOpen ABI does not define this | |
6528 | relocation type. */ | |
6529 | case R_RBRC: | |
6530 | /* The PowerPC ABI defines this as an absolute branch to a | |
6531 | fixed address which may be modified to a relative branch. | |
6532 | The PowerOpen ABI does not define this relocation type. */ | |
6533 | howto.src_mask &= ~3; | |
6534 | howto.dst_mask = howto.src_mask; | |
6535 | break; | |
6536 | case R_BR: | |
6537 | /* Relative branch. We don't want to mess with the lower | |
6538 | two bits of the instruction. */ | |
6539 | case R_CREL: | |
6540 | /* The PowerPC ABI defines this as a relative call which may | |
6541 | be modified to become an absolute call. The PowerOpen | |
6542 | ABI does not define this relocation type. */ | |
6543 | case R_RBR: | |
6544 | /* A relative branch which may be modified to become an | |
6545 | absolute branch. FIXME: We don't implement this, | |
6546 | although we should for symbols of storage mapping class | |
6547 | XMC_XO. */ | |
6548 | howto.pc_relative = true; | |
6549 | howto.src_mask &= ~3; | |
6550 | howto.dst_mask = howto.src_mask; | |
6551 | break; | |
6552 | case R_RL: | |
6553 | /* The PowerPC AIX ABI describes this as a load which may be | |
6554 | changed to a load address. The PowerOpen ABI says this | |
6555 | is the same as case R_POS. */ | |
6556 | break; | |
6557 | case R_RLA: | |
6558 | /* The PowerPC AIX ABI describes this as a load address | |
6559 | which may be changed to a load. The PowerOpen ABI says | |
6560 | this is the same as R_POS. */ | |
6561 | break; | |
6562 | } | |
6563 | ||
6564 | /* If we see an R_BR or R_RBR reloc which is jumping to global | |
6565 | linkage code, and it is followed by an appropriate cror nop | |
6566 | instruction, we replace the cror with lwz r2,20(r1). This | |
6567 | restores the TOC after the glink code. Contrariwise, if the | |
6568 | call is followed by a lwz r2,20(r1), but the call is not | |
6569 | going to global linkage code, we can replace the load with a | |
6570 | cror. */ | |
6571 | if ((rel->r_type == R_BR || rel->r_type == R_RBR) | |
6572 | && h != NULL | |
6573 | && h->root.type == bfd_link_hash_defined | |
6574 | && (rel->r_vaddr - input_section->vma + 8 | |
6575 | <= input_section->_cooked_size)) | |
6576 | { | |
6577 | bfd_byte *pnext; | |
6578 | unsigned long next; | |
6579 | ||
6580 | pnext = contents + (rel->r_vaddr - input_section->vma) + 4; | |
6581 | next = bfd_get_32 (input_bfd, pnext); | |
6582 | ||
6583 | /* The _ptrgl function is magic. It is used by the AIX | |
6584 | compiler to call a function through a pointer. */ | |
6585 | if (h->smclas == XMC_GL | |
6586 | || strcmp (h->root.root.string, "._ptrgl") == 0) | |
6587 | { | |
6588 | if (next == 0x4def7b82 /* cror 15,15,15 */ | |
6589 | || next == 0x4ffffb82) /* cror 31,31,31 */ | |
6590 | bfd_put_32 (input_bfd, 0x80410014, pnext); /* lwz r1,20(r1) */ | |
6591 | } | |
6592 | else | |
6593 | { | |
6594 | if (next == 0x80410014) /* lwz r1,20(r1) */ | |
6595 | bfd_put_32 (input_bfd, 0x4ffffb82, pnext); /* cror 31,31,31 */ | |
6596 | } | |
6597 | } | |
6598 | ||
6599 | /* A PC relative reloc includes the section address. */ | |
6600 | if (howto.pc_relative) | |
6601 | addend += input_section->vma; | |
6602 | ||
6603 | rstat = _bfd_final_link_relocate (&howto, input_bfd, input_section, | |
6604 | contents, | |
6605 | rel->r_vaddr - input_section->vma, | |
6606 | val, addend); | |
6607 | ||
6608 | switch (rstat) | |
6609 | { | |
6610 | default: | |
6611 | abort (); | |
6612 | case bfd_reloc_ok: | |
6613 | break; | |
6614 | case bfd_reloc_overflow: | |
6615 | { | |
6616 | const char *name; | |
6617 | char buf[SYMNMLEN + 1]; | |
6618 | char howto_name[10]; | |
6619 | ||
6620 | if (symndx == -1) | |
6621 | name = "*ABS*"; | |
6622 | else if (h != NULL) | |
6623 | name = h->root.root.string; | |
6624 | else | |
6625 | { | |
6626 | name = _bfd_coff_internal_syment_name (input_bfd, sym, buf); | |
6627 | if (name == NULL) | |
6628 | return false; | |
6629 | } | |
6630 | sprintf (howto_name, "0x%02x", rel->r_type); | |
6631 | ||
6632 | if (! ((*info->callbacks->reloc_overflow) | |
6633 | (info, name, howto_name, (bfd_vma) 0, input_bfd, | |
6634 | input_section, rel->r_vaddr - input_section->vma))) | |
6635 | return false; | |
6636 | } | |
6637 | } | |
6638 | } | |
6639 | ||
6640 | return true; | |
6641 | } |