Commit | Line | Data |
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252b5132 | 1 | /* BFD back-end for linux flavored m68k a.out binaries. |
eea6121a | 2 | Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002, |
2c3fc389 | 3 | 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 |
7686d77d | 4 | Free Software Foundation, Inc. |
252b5132 | 5 | |
cd123cb7 NC |
6 | This file is part of BFD, the Binary File Descriptor library. |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | MA 02110-1301, USA. */ | |
252b5132 RH |
22 | |
23 | #define TARGET_PAGE_SIZE 4096 | |
24 | #define ZMAGIC_DISK_BLOCK_SIZE 1024 | |
25 | #define SEGMENT_SIZE TARGET_PAGE_SIZE | |
26 | #define TEXT_START_ADDR 0x0 | |
252b5132 RH |
27 | |
28 | #define MACHTYPE_OK(mtype) ((mtype) == M_68020 || (mtype) == M_UNKNOWN) | |
29 | ||
252b5132 | 30 | #include "sysdep.h" |
3db64b00 | 31 | #include "bfd.h" |
252b5132 RH |
32 | #include "libbfd.h" |
33 | #include "aout/aout64.h" | |
34 | #include "aout/stab_gnu.h" | |
35 | #include "aout/ar.h" | |
36 | #include "libaout.h" /* BFD a.out internal data structures */ | |
37 | ||
38 | #define TARGET_IS_BIG_ENDIAN_P | |
39 | #define DEFAULT_ARCH bfd_arch_m68k | |
e43d48cc AM |
40 | |
41 | /* Do not "beautify" the CONCAT* macro args. Traditional C will not | |
42 | remove whitespace added here, and thus will fail to concatenate | |
43 | the tokens. */ | |
44 | #define MY(OP) CONCAT2 (m68klinux_,OP) | |
252b5132 RH |
45 | #define TARGETNAME "a.out-m68k-linux" |
46 | ||
47 | extern const bfd_target MY(vec); | |
48 | ||
49 | /* We always generate QMAGIC files in preference to ZMAGIC files. It | |
50 | would be possible to make this a linker option, if that ever | |
51 | becomes important. */ | |
52 | ||
53 | static void MY_final_link_callback | |
2c3fc389 | 54 | (bfd *, file_ptr *, file_ptr *, file_ptr *); |
252b5132 | 55 | |
b34976b6 | 56 | static bfd_boolean |
2c3fc389 NC |
57 | m68klinux_bfd_final_link (bfd *abfd, |
58 | struct bfd_link_info *info) | |
252b5132 RH |
59 | { |
60 | obj_aout_subformat (abfd) = q_magic_format; | |
61 | return NAME(aout,final_link) (abfd, info, MY_final_link_callback); | |
62 | } | |
63 | ||
64 | #define MY_bfd_final_link m68klinux_bfd_final_link | |
65 | ||
66 | /* Set the machine type correctly. */ | |
67 | ||
b34976b6 | 68 | static bfd_boolean |
2c3fc389 | 69 | m68klinux_write_object_contents (bfd *abfd) |
252b5132 RH |
70 | { |
71 | struct external_exec exec_bytes; | |
72 | struct internal_exec *execp = exec_hdr (abfd); | |
73 | ||
74 | N_SET_MACHTYPE (*execp, M_68020); | |
75 | ||
76 | obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; | |
77 | ||
78 | WRITE_HEADERS(abfd, execp); | |
79 | ||
b34976b6 | 80 | return TRUE; |
252b5132 RH |
81 | } |
82 | ||
83 | #define MY_write_object_contents m68klinux_write_object_contents | |
84 | \f | |
85 | /* Code to link against Linux a.out shared libraries. */ | |
86 | ||
87 | /* See if a symbol name is a reference to the global offset table. */ | |
88 | ||
89 | #ifndef GOT_REF_PREFIX | |
90 | #define GOT_REF_PREFIX "__GOT_" | |
91 | #endif | |
92 | ||
0112cd26 | 93 | #define IS_GOT_SYM(name) (CONST_STRNEQ (name, GOT_REF_PREFIX)) |
252b5132 RH |
94 | |
95 | /* See if a symbol name is a reference to the procedure linkage table. */ | |
96 | ||
97 | #ifndef PLT_REF_PREFIX | |
98 | #define PLT_REF_PREFIX "__PLT_" | |
99 | #endif | |
100 | ||
0112cd26 | 101 | #define IS_PLT_SYM(name) (CONST_STRNEQ (name, PLT_REF_PREFIX)) |
252b5132 RH |
102 | |
103 | /* This string is used to generate specialized error messages. */ | |
104 | ||
105 | #ifndef NEEDS_SHRLIB | |
106 | #define NEEDS_SHRLIB "__NEEDS_SHRLIB_" | |
107 | #endif | |
108 | ||
109 | /* This special symbol is a set vector that contains a list of | |
7dee875e | 110 | pointers to fixup tables. It will be present in any dynamically |
252b5132 RH |
111 | linked file. The linker generated fixup table should also be added |
112 | to the list, and it should always appear in the second slot (the | |
113 | first one is a dummy with a magic number that is defined in | |
114 | crt0.o). */ | |
115 | ||
116 | #ifndef SHARABLE_CONFLICTS | |
117 | #define SHARABLE_CONFLICTS "__SHARABLE_CONFLICTS__" | |
118 | #endif | |
119 | ||
120 | /* We keep a list of fixups. The terminology is a bit strange, but | |
121 | each fixup contains two 32 bit numbers. A regular fixup contains | |
122 | an address and a pointer, and at runtime we should store the | |
123 | address at the location pointed to by the pointer. A builtin fixup | |
124 | contains two pointers, and we should read the address using one | |
125 | pointer and store it at the location pointed to by the other | |
126 | pointer. Builtin fixups come into play when we have duplicate | |
127 | __GOT__ symbols for the same variable. The builtin fixup will copy | |
128 | the GOT pointer from one over into the other. */ | |
129 | ||
130 | struct fixup | |
131 | { | |
132 | struct fixup *next; | |
133 | struct linux_link_hash_entry *h; | |
134 | bfd_vma value; | |
135 | ||
136 | /* Nonzero if this is a jump instruction that needs to be fixed, | |
137 | zero if this is just a pointer */ | |
138 | char jump; | |
139 | ||
140 | char builtin; | |
141 | }; | |
142 | ||
143 | /* We don't need a special hash table entry structure, but we do need | |
144 | to keep some information between linker passes, so we use a special | |
145 | hash table. */ | |
146 | ||
147 | struct linux_link_hash_entry | |
148 | { | |
149 | struct aout_link_hash_entry root; | |
150 | }; | |
151 | ||
152 | struct linux_link_hash_table | |
153 | { | |
154 | struct aout_link_hash_table root; | |
155 | ||
156 | /* First dynamic object found in link. */ | |
157 | bfd *dynobj; | |
158 | ||
159 | /* Number of fixups. */ | |
160 | size_t fixup_count; | |
161 | ||
162 | /* Number of builtin fixups. */ | |
163 | size_t local_builtins; | |
164 | ||
165 | /* List of fixups. */ | |
166 | struct fixup *fixup_list; | |
167 | }; | |
168 | ||
252b5132 RH |
169 | /* Routine to create an entry in an Linux link hash table. */ |
170 | ||
171 | static struct bfd_hash_entry * | |
2c3fc389 NC |
172 | linux_link_hash_newfunc (struct bfd_hash_entry *entry, |
173 | struct bfd_hash_table *table, | |
174 | const char *string) | |
252b5132 RH |
175 | { |
176 | struct linux_link_hash_entry *ret = (struct linux_link_hash_entry *) entry; | |
177 | ||
178 | /* Allocate the structure if it has not already been allocated by a | |
179 | subclass. */ | |
180 | if (ret == (struct linux_link_hash_entry *) NULL) | |
181 | ret = ((struct linux_link_hash_entry *) | |
182 | bfd_hash_allocate (table, sizeof (struct linux_link_hash_entry))); | |
183 | if (ret == NULL) | |
184 | return (struct bfd_hash_entry *) ret; | |
185 | ||
186 | /* Call the allocation method of the superclass. */ | |
187 | ret = ((struct linux_link_hash_entry *) | |
188 | NAME(aout,link_hash_newfunc) ((struct bfd_hash_entry *) ret, | |
189 | table, string)); | |
190 | if (ret != NULL) | |
191 | { | |
192 | /* Set local fields; there aren't any. */ | |
193 | } | |
194 | ||
195 | return (struct bfd_hash_entry *) ret; | |
196 | } | |
197 | ||
198 | /* Create a Linux link hash table. */ | |
199 | ||
200 | static struct bfd_link_hash_table * | |
2c3fc389 | 201 | linux_link_hash_table_create (bfd *abfd) |
252b5132 RH |
202 | { |
203 | struct linux_link_hash_table *ret; | |
dc810e39 | 204 | bfd_size_type amt = sizeof (struct linux_link_hash_table); |
252b5132 | 205 | |
e2d34d7d | 206 | ret = (struct linux_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
207 | if (ret == (struct linux_link_hash_table *) NULL) |
208 | { | |
209 | bfd_set_error (bfd_error_no_memory); | |
210 | return (struct bfd_link_hash_table *) NULL; | |
211 | } | |
66eb6687 AM |
212 | if (!NAME(aout,link_hash_table_init) (&ret->root, abfd, |
213 | linux_link_hash_newfunc, | |
214 | sizeof (struct linux_link_hash_entry))) | |
252b5132 RH |
215 | { |
216 | free (ret); | |
217 | return (struct bfd_link_hash_table *) NULL; | |
218 | } | |
219 | ||
220 | ret->dynobj = NULL; | |
221 | ret->fixup_count = 0; | |
222 | ret->local_builtins = 0; | |
223 | ret->fixup_list = NULL; | |
224 | ||
225 | return &ret->root.root; | |
226 | } | |
227 | ||
228 | /* Look up an entry in a Linux link hash table. */ | |
229 | ||
230 | #define linux_link_hash_lookup(table, string, create, copy, follow) \ | |
231 | ((struct linux_link_hash_entry *) \ | |
232 | aout_link_hash_lookup (&(table)->root, (string), (create), (copy),\ | |
233 | (follow))) | |
234 | ||
235 | /* Traverse a Linux link hash table. */ | |
236 | ||
237 | #define linux_link_hash_traverse(table, func, info) \ | |
238 | (aout_link_hash_traverse \ | |
239 | (&(table)->root, \ | |
2c3fc389 | 240 | (bfd_boolean (*) (struct aout_link_hash_entry *, void *)) (func), \ |
252b5132 RH |
241 | (info))) |
242 | ||
243 | /* Get the Linux link hash table from the info structure. This is | |
244 | just a cast. */ | |
245 | ||
246 | #define linux_hash_table(p) ((struct linux_link_hash_table *) ((p)->hash)) | |
247 | ||
248 | /* Store the information for a new fixup. */ | |
249 | ||
250 | static struct fixup * | |
2c3fc389 NC |
251 | new_fixup (struct bfd_link_info *info, |
252 | struct linux_link_hash_entry *h, | |
253 | bfd_vma value, | |
254 | int builtin) | |
252b5132 RH |
255 | { |
256 | struct fixup *f; | |
257 | ||
258 | f = (struct fixup *) bfd_hash_allocate (&info->hash->table, | |
259 | sizeof (struct fixup)); | |
260 | if (f == NULL) | |
261 | return f; | |
262 | f->next = linux_hash_table (info)->fixup_list; | |
263 | linux_hash_table (info)->fixup_list = f; | |
264 | f->h = h; | |
265 | f->value = value; | |
266 | f->builtin = builtin; | |
267 | f->jump = 0; | |
268 | ++linux_hash_table (info)->fixup_count; | |
269 | return f; | |
270 | } | |
271 | ||
272 | /* We come here once we realize that we are going to link to a shared | |
273 | library. We need to create a special section that contains the | |
274 | fixup table, and we ultimately need to add a pointer to this into | |
275 | the set vector for SHARABLE_CONFLICTS. At this point we do not | |
276 | know the size of the section, but that's OK - we just need to | |
277 | create it for now. */ | |
278 | ||
b34976b6 | 279 | static bfd_boolean |
2c3fc389 NC |
280 | linux_link_create_dynamic_sections (bfd *abfd, |
281 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
252b5132 RH |
282 | { |
283 | flagword flags; | |
2c3fc389 | 284 | asection *s; |
252b5132 RH |
285 | |
286 | /* Note that we set the SEC_IN_MEMORY flag. */ | |
287 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
288 | ||
289 | /* We choose to use the name ".linux-dynamic" for the fixup table. | |
290 | Why not? */ | |
117ed4f8 | 291 | s = bfd_make_section_with_flags (abfd, ".linux-dynamic", flags); |
252b5132 | 292 | if (s == NULL |
252b5132 | 293 | || ! bfd_set_section_alignment (abfd, s, 2)) |
b34976b6 | 294 | return FALSE; |
eea6121a | 295 | s->size = 0; |
252b5132 RH |
296 | s->contents = 0; |
297 | ||
b34976b6 | 298 | return TRUE; |
252b5132 RH |
299 | } |
300 | ||
301 | /* Function to add a single symbol to the linker hash table. This is | |
302 | a wrapper around _bfd_generic_link_add_one_symbol which handles the | |
303 | tweaking needed for dynamic linking support. */ | |
304 | ||
b34976b6 | 305 | static bfd_boolean |
2c3fc389 NC |
306 | linux_add_one_symbol (struct bfd_link_info *info, |
307 | bfd *abfd, | |
308 | const char *name, | |
309 | flagword flags, | |
310 | asection *section, | |
311 | bfd_vma value, | |
312 | const char *string, | |
313 | bfd_boolean copy, | |
314 | bfd_boolean collect, | |
315 | struct bfd_link_hash_entry **hashp) | |
252b5132 RH |
316 | { |
317 | struct linux_link_hash_entry *h; | |
b34976b6 | 318 | bfd_boolean insert; |
252b5132 RH |
319 | |
320 | /* Look up and see if we already have this symbol in the hash table. | |
321 | If we do, and the defining entry is from a shared library, we | |
322 | need to create the dynamic sections. | |
323 | ||
f13a99db AM |
324 | FIXME: What if abfd->xvec != info->output_bfd->xvec? We may |
325 | want to be able to link Linux a.out and ELF objects together, | |
326 | but serious confusion is possible. */ | |
252b5132 | 327 | |
b34976b6 | 328 | insert = FALSE; |
252b5132 | 329 | |
1049f94e | 330 | if (! info->relocatable |
252b5132 RH |
331 | && linux_hash_table (info)->dynobj == NULL |
332 | && strcmp (name, SHARABLE_CONFLICTS) == 0 | |
333 | && (flags & BSF_CONSTRUCTOR) != 0 | |
f13a99db | 334 | && abfd->xvec == info->output_bfd->xvec) |
252b5132 RH |
335 | { |
336 | if (! linux_link_create_dynamic_sections (abfd, info)) | |
b34976b6 | 337 | return FALSE; |
252b5132 | 338 | linux_hash_table (info)->dynobj = abfd; |
b34976b6 | 339 | insert = TRUE; |
252b5132 RH |
340 | } |
341 | ||
342 | if (bfd_is_abs_section (section) | |
f13a99db | 343 | && abfd->xvec == info->output_bfd->xvec) |
252b5132 | 344 | { |
b34976b6 AM |
345 | h = linux_link_hash_lookup (linux_hash_table (info), name, FALSE, |
346 | FALSE, FALSE); | |
252b5132 RH |
347 | if (h != NULL |
348 | && (h->root.root.type == bfd_link_hash_defined | |
349 | || h->root.root.type == bfd_link_hash_defweak)) | |
350 | { | |
351 | struct fixup *f; | |
352 | ||
353 | if (hashp != NULL) | |
354 | *hashp = (struct bfd_link_hash_entry *) h; | |
355 | ||
356 | f = new_fixup (info, h, value, ! IS_PLT_SYM (name)); | |
357 | if (f == NULL) | |
b34976b6 | 358 | return FALSE; |
252b5132 RH |
359 | f->jump = IS_PLT_SYM (name); |
360 | ||
b34976b6 | 361 | return TRUE; |
252b5132 RH |
362 | } |
363 | } | |
364 | ||
365 | /* Do the usual procedure for adding a symbol. */ | |
366 | if (! _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section, | |
367 | value, string, copy, collect, | |
368 | hashp)) | |
b34976b6 | 369 | return FALSE; |
252b5132 RH |
370 | |
371 | /* Insert a pointer to our table in the set vector. The dynamic | |
372 | linker requires this information */ | |
373 | if (insert) | |
374 | { | |
375 | asection *s; | |
376 | ||
377 | /* Here we do our special thing to add the pointer to the | |
378 | dynamic section in the SHARABLE_CONFLICTS set vector. */ | |
379 | s = bfd_get_section_by_name (linux_hash_table (info)->dynobj, | |
380 | ".linux-dynamic"); | |
381 | BFD_ASSERT (s != NULL); | |
382 | ||
383 | if (! (_bfd_generic_link_add_one_symbol | |
384 | (info, linux_hash_table (info)->dynobj, SHARABLE_CONFLICTS, | |
dc810e39 | 385 | BSF_GLOBAL | BSF_CONSTRUCTOR, s, (bfd_vma) 0, NULL, |
b34976b6 AM |
386 | FALSE, FALSE, NULL))) |
387 | return FALSE; | |
252b5132 RH |
388 | } |
389 | ||
b34976b6 | 390 | return TRUE; |
252b5132 RH |
391 | } |
392 | ||
393 | /* We will crawl the hash table and come here for every global symbol. | |
394 | We will examine each entry and see if there are indications that we | |
395 | need to add a fixup. There are two possible cases - one is where | |
396 | you have duplicate definitions of PLT or GOT symbols - these will | |
397 | have already been caught and added as "builtin" fixups. If we find | |
398 | that the corresponding non PLT/GOT symbol is also present, we | |
399 | convert it to a regular fixup instead. | |
400 | ||
401 | This function is called via linux_link_hash_traverse. */ | |
402 | ||
b34976b6 | 403 | static bfd_boolean |
2c3fc389 NC |
404 | linux_tally_symbols (struct linux_link_hash_entry *h, |
405 | void * data) | |
252b5132 RH |
406 | { |
407 | struct bfd_link_info *info = (struct bfd_link_info *) data; | |
408 | struct fixup *f, *f1; | |
409 | int is_plt; | |
410 | struct linux_link_hash_entry *h1, *h2; | |
b34976b6 | 411 | bfd_boolean exists; |
252b5132 RH |
412 | |
413 | if (h->root.root.type == bfd_link_hash_undefined | |
0112cd26 | 414 | && CONST_STRNEQ (h->root.root.root.string, NEEDS_SHRLIB)) |
252b5132 RH |
415 | { |
416 | const char *name; | |
417 | char *p; | |
418 | char *alloc = NULL; | |
419 | ||
420 | name = h->root.root.root.string + sizeof NEEDS_SHRLIB - 1; | |
421 | p = strrchr (name, '_'); | |
422 | if (p != NULL) | |
dc810e39 | 423 | alloc = (char *) bfd_malloc ((bfd_size_type) strlen (name) + 1); |
252b5132 RH |
424 | |
425 | if (p == NULL || alloc == NULL) | |
426 | (*_bfd_error_handler) (_("Output file requires shared library `%s'\n"), | |
427 | name); | |
428 | else | |
429 | { | |
430 | strcpy (alloc, name); | |
431 | p = strrchr (alloc, '_'); | |
432 | *p++ = '\0'; | |
433 | (*_bfd_error_handler) | |
434 | (_("Output file requires shared library `%s.so.%s'\n"), | |
435 | alloc, p); | |
436 | free (alloc); | |
437 | } | |
438 | ||
439 | abort (); | |
440 | } | |
441 | ||
442 | /* If this symbol is not a PLT/GOT, we do not even need to look at it */ | |
443 | is_plt = IS_PLT_SYM (h->root.root.root.string); | |
444 | ||
445 | if (is_plt || IS_GOT_SYM (h->root.root.root.string)) | |
446 | { | |
447 | /* Look up this symbol twice. Once just as a regular lookup, | |
448 | and then again following all of the indirect links until we | |
449 | reach a real symbol. */ | |
450 | h1 = linux_link_hash_lookup (linux_hash_table (info), | |
451 | (h->root.root.root.string | |
452 | + sizeof PLT_REF_PREFIX - 1), | |
b34976b6 | 453 | FALSE, FALSE, TRUE); |
1518639e KH |
454 | /* h2 does not follow indirect symbols. */ |
455 | h2 = linux_link_hash_lookup (linux_hash_table (info), | |
252b5132 RH |
456 | (h->root.root.root.string |
457 | + sizeof PLT_REF_PREFIX - 1), | |
b34976b6 | 458 | FALSE, FALSE, FALSE); |
252b5132 RH |
459 | |
460 | /* The real symbol must exist but if it is also an ABS symbol, | |
461 | there is no need to have a fixup. This is because they both | |
462 | came from the same library. If on the other hand, we had to | |
463 | use an indirect symbol to get to the real symbol, we add the | |
464 | fixup anyway, since there are cases where these symbols come | |
465 | from different shared libraries */ | |
466 | if (h1 != NULL | |
467 | && (((h1->root.root.type == bfd_link_hash_defined | |
468 | || h1->root.root.type == bfd_link_hash_defweak) | |
469 | && ! bfd_is_abs_section (h1->root.root.u.def.section)) | |
470 | || h2->root.root.type == bfd_link_hash_indirect)) | |
471 | { | |
472 | /* See if there is a "builtin" fixup already present | |
473 | involving this symbol. If so, convert it to a regular | |
474 | fixup. In the end, this relaxes some of the requirements | |
475 | about the order of performing fixups. */ | |
b34976b6 | 476 | exists = FALSE; |
252b5132 RH |
477 | for (f1 = linux_hash_table (info)->fixup_list; |
478 | f1 != NULL; | |
479 | f1 = f1->next) | |
480 | { | |
481 | if ((f1->h != h && f1->h != h1) | |
482 | || (! f1->builtin && ! f1->jump)) | |
483 | continue; | |
484 | if (f1->h == h1) | |
b34976b6 | 485 | exists = TRUE; |
252b5132 RH |
486 | if (! exists |
487 | && bfd_is_abs_section (h->root.root.u.def.section)) | |
488 | { | |
489 | f = new_fixup (info, h1, f1->h->root.root.u.def.value, 0); | |
490 | f->jump = is_plt; | |
491 | } | |
492 | f1->h = h1; | |
493 | f1->jump = is_plt; | |
494 | f1->builtin = 0; | |
b34976b6 | 495 | exists = TRUE; |
252b5132 RH |
496 | } |
497 | if (! exists | |
498 | && bfd_is_abs_section (h->root.root.u.def.section)) | |
499 | { | |
500 | f = new_fixup (info, h1, h->root.root.u.def.value, 0); | |
501 | if (f == NULL) | |
502 | { | |
503 | /* FIXME: No way to return error. */ | |
504 | abort (); | |
505 | } | |
506 | f->jump = is_plt; | |
507 | } | |
508 | } | |
509 | ||
510 | /* Quick and dirty way of stripping these symbols from the | |
1518639e | 511 | symtab. */ |
252b5132 | 512 | if (bfd_is_abs_section (h->root.root.u.def.section)) |
b34976b6 | 513 | h->root.written = TRUE; |
252b5132 RH |
514 | } |
515 | ||
b34976b6 | 516 | return TRUE; |
252b5132 RH |
517 | } |
518 | ||
519 | /* This is called to set the size of the .linux-dynamic section is. | |
520 | It is called by the Linux linker emulation before_allocation | |
521 | routine. We have finished reading all of the input files, and now | |
522 | we just scan the hash tables to find out how many additional fixups | |
523 | are required. */ | |
524 | ||
b34976b6 | 525 | bfd_boolean |
2c3fc389 NC |
526 | bfd_m68klinux_size_dynamic_sections (bfd *output_bfd, |
527 | struct bfd_link_info *info) | |
252b5132 RH |
528 | { |
529 | struct fixup *f; | |
530 | asection *s; | |
531 | ||
532 | if (output_bfd->xvec != &MY(vec)) | |
b34976b6 | 533 | return TRUE; |
252b5132 | 534 | |
1518639e | 535 | /* First find the fixups... */ |
252b5132 RH |
536 | linux_link_hash_traverse (linux_hash_table (info), |
537 | linux_tally_symbols, | |
2c3fc389 | 538 | info); |
252b5132 RH |
539 | |
540 | /* If there are builtin fixups, leave room for a marker. This is | |
541 | used by the dynamic linker so that it knows that all that follow | |
542 | are builtin fixups instead of regular fixups. */ | |
543 | for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next) | |
544 | { | |
545 | if (f->builtin) | |
546 | { | |
547 | ++linux_hash_table (info)->fixup_count; | |
548 | ++linux_hash_table (info)->local_builtins; | |
549 | break; | |
550 | } | |
551 | } | |
552 | ||
553 | if (linux_hash_table (info)->dynobj == NULL) | |
554 | { | |
555 | if (linux_hash_table (info)->fixup_count > 0) | |
556 | abort (); | |
b34976b6 | 557 | return TRUE; |
252b5132 RH |
558 | } |
559 | ||
560 | /* Allocate memory for our fixup table. We will fill it in later. */ | |
561 | s = bfd_get_section_by_name (linux_hash_table (info)->dynobj, | |
562 | ".linux-dynamic"); | |
563 | if (s != NULL) | |
564 | { | |
eea6121a AM |
565 | s->size = linux_hash_table (info)->fixup_count + 1; |
566 | s->size *= 8; | |
567 | s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->size); | |
252b5132 RH |
568 | if (s->contents == NULL) |
569 | { | |
570 | bfd_set_error (bfd_error_no_memory); | |
b34976b6 | 571 | return FALSE; |
252b5132 | 572 | } |
252b5132 RH |
573 | } |
574 | ||
b34976b6 | 575 | return TRUE; |
252b5132 RH |
576 | } |
577 | ||
578 | /* We come here once we are ready to actually write the fixup table to | |
579 | the output file. Scan the fixup tables and so forth and generate | |
580 | the stuff we need. */ | |
581 | ||
b34976b6 | 582 | static bfd_boolean |
2c3fc389 | 583 | linux_finish_dynamic_link (bfd *output_bfd, struct bfd_link_info *info) |
252b5132 RH |
584 | { |
585 | asection *s, *os, *is; | |
586 | bfd_byte *fixup_table; | |
587 | struct linux_link_hash_entry *h; | |
588 | struct fixup *f; | |
589 | unsigned int new_addr; | |
590 | int section_offset; | |
591 | unsigned int fixups_written; | |
592 | ||
593 | if (linux_hash_table (info)->dynobj == NULL) | |
b34976b6 | 594 | return TRUE; |
252b5132 RH |
595 | |
596 | s = bfd_get_section_by_name (linux_hash_table (info)->dynobj, | |
597 | ".linux-dynamic"); | |
598 | BFD_ASSERT (s != NULL); | |
599 | os = s->output_section; | |
600 | fixups_written = 0; | |
601 | ||
602 | #ifdef LINUX_LINK_DEBUG | |
1518639e | 603 | printf ("Fixup table file offset: %x VMA: %x\n", |
252b5132 RH |
604 | os->filepos + s->output_offset, |
605 | os->vma + s->output_offset); | |
606 | #endif | |
607 | ||
608 | fixup_table = s->contents; | |
dc810e39 AM |
609 | bfd_put_32 (output_bfd, (bfd_vma) linux_hash_table (info)->fixup_count, |
610 | fixup_table); | |
252b5132 RH |
611 | fixup_table += 4; |
612 | ||
613 | /* Fill in fixup table. */ | |
614 | for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next) | |
615 | { | |
616 | if (f->builtin) | |
617 | continue; | |
618 | ||
619 | if (f->h->root.root.type != bfd_link_hash_defined | |
620 | && f->h->root.root.type != bfd_link_hash_defweak) | |
621 | { | |
622 | (*_bfd_error_handler) | |
623 | (_("Symbol %s not defined for fixups\n"), | |
624 | f->h->root.root.root.string); | |
625 | continue; | |
626 | } | |
627 | ||
628 | is = f->h->root.root.u.def.section; | |
629 | section_offset = is->output_section->vma + is->output_offset; | |
630 | new_addr = f->h->root.root.u.def.value + section_offset; | |
631 | ||
632 | #ifdef LINUX_LINK_DEBUG | |
633 | printf ("Fixup(%d) %s: %x %x\n",f->jump, f->h->root.root.string, | |
634 | new_addr, f->value); | |
635 | #endif | |
636 | ||
637 | if (f->jump) | |
638 | { | |
dc810e39 | 639 | bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table); |
252b5132 RH |
640 | fixup_table += 4; |
641 | bfd_put_32 (output_bfd, f->value + 2, fixup_table); | |
642 | fixup_table += 4; | |
643 | } | |
644 | else | |
645 | { | |
dc810e39 | 646 | bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table); |
252b5132 RH |
647 | fixup_table += 4; |
648 | bfd_put_32 (output_bfd, f->value, fixup_table); | |
649 | fixup_table += 4; | |
650 | } | |
651 | ++fixups_written; | |
652 | } | |
653 | ||
654 | if (linux_hash_table (info)->local_builtins != 0) | |
655 | { | |
656 | /* Special marker so we know to switch to the other type of fixup */ | |
dc810e39 | 657 | bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table); |
252b5132 | 658 | fixup_table += 4; |
dc810e39 | 659 | bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table); |
252b5132 RH |
660 | fixup_table += 4; |
661 | ++fixups_written; | |
662 | for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next) | |
663 | { | |
664 | if (! f->builtin) | |
665 | continue; | |
666 | ||
667 | if (f->h->root.root.type != bfd_link_hash_defined | |
668 | && f->h->root.root.type != bfd_link_hash_defweak) | |
669 | { | |
670 | (*_bfd_error_handler) | |
671 | (_("Symbol %s not defined for fixups\n"), | |
672 | f->h->root.root.root.string); | |
673 | continue; | |
674 | } | |
675 | ||
676 | is = f->h->root.root.u.def.section; | |
677 | section_offset = is->output_section->vma + is->output_offset; | |
678 | new_addr = f->h->root.root.u.def.value + section_offset; | |
679 | ||
680 | #ifdef LINUX_LINK_DEBUG | |
681 | printf ("Fixup(B) %s: %x %x\n", f->h->root.root.string, | |
682 | new_addr, f->value); | |
683 | #endif | |
684 | ||
dc810e39 | 685 | bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table); |
252b5132 RH |
686 | fixup_table += 4; |
687 | bfd_put_32 (output_bfd, f->value, fixup_table); | |
688 | fixup_table += 4; | |
689 | ++fixups_written; | |
690 | } | |
691 | } | |
692 | ||
693 | if (linux_hash_table (info)->fixup_count != fixups_written) | |
694 | { | |
695 | (*_bfd_error_handler) (_("Warning: fixup count mismatch\n")); | |
696 | while (linux_hash_table (info)->fixup_count > fixups_written) | |
697 | { | |
dc810e39 | 698 | bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table); |
252b5132 | 699 | fixup_table += 4; |
dc810e39 | 700 | bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table); |
252b5132 RH |
701 | fixup_table += 4; |
702 | ++fixups_written; | |
703 | } | |
704 | } | |
705 | ||
1518639e | 706 | h = linux_link_hash_lookup (linux_hash_table (info), |
252b5132 | 707 | "__BUILTIN_FIXUPS__", |
b34976b6 | 708 | FALSE, FALSE, FALSE); |
252b5132 RH |
709 | |
710 | if (h != NULL | |
711 | && (h->root.root.type == bfd_link_hash_defined | |
712 | || h->root.root.type == bfd_link_hash_defweak)) | |
713 | { | |
714 | is = h->root.root.u.def.section; | |
715 | section_offset = is->output_section->vma + is->output_offset; | |
716 | new_addr = h->root.root.u.def.value + section_offset; | |
717 | ||
718 | #ifdef LINUX_LINK_DEBUG | |
719 | printf ("Builtin fixup table at %x\n", new_addr); | |
720 | #endif | |
721 | ||
dc810e39 | 722 | bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table); |
252b5132 RH |
723 | } |
724 | else | |
dc810e39 | 725 | bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table); |
252b5132 | 726 | |
dc810e39 AM |
727 | if (bfd_seek (output_bfd, (file_ptr) (os->filepos + s->output_offset), |
728 | SEEK_SET) != 0) | |
b34976b6 | 729 | return FALSE; |
252b5132 | 730 | |
2c3fc389 | 731 | if (bfd_bwrite (s->contents, s->size, output_bfd) != s->size) |
b34976b6 | 732 | return FALSE; |
252b5132 | 733 | |
b34976b6 | 734 | return TRUE; |
252b5132 RH |
735 | } |
736 | ||
737 | #define MY_bfd_link_hash_table_create linux_link_hash_table_create | |
738 | #define MY_add_one_symbol linux_add_one_symbol | |
739 | #define MY_finish_dynamic_link linux_finish_dynamic_link | |
740 | ||
741 | #define MY_zmagic_contiguous 1 | |
742 | ||
743 | #include "aout-target.h" |