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252b5132 | 1 | /* BFD back-end for linux flavored sparc a.out binaries. |
93516ec3 | 2 | Copyright 1992, 1993, 1994, 1995, 1996, 1997, 2000, 2001, 2002, 2003 |
5f771d47 | 3 | Free Software Foundation, Inc. |
252b5132 RH |
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, | |
20 | USA. */ | |
21 | ||
b34976b6 AM |
22 | #define TARGET_PAGE_SIZE 4096 |
23 | #define ZMAGIC_DISK_BLOCK_SIZE 1024 | |
24 | #define SEGMENT_SIZE TARGET_PAGE_SIZE | |
25 | #define TEXT_START_ADDR 0x0 | |
26 | #define N_SHARED_LIB(x) 0 | |
252b5132 RH |
27 | |
28 | #define MACHTYPE_OK(mtype) ((mtype) == M_SPARC || (mtype) == M_UNKNOWN) | |
29 | ||
30 | #include "bfd.h" | |
31 | #include "sysdep.h" | |
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 DEFAULT_ARCH bfd_arch_sparc | |
e43d48cc AM |
39 | /* Do not "beautify" the CONCAT* macro args. Traditional C will not |
40 | remove whitespace added here, and thus will fail to concatenate | |
41 | the tokens. */ | |
42 | #define MY(OP) CONCAT2 (sparclinux_,OP) | |
252b5132 RH |
43 | #define TARGETNAME "a.out-sparc-linux" |
44 | ||
45 | extern const bfd_target MY(vec); | |
46 | ||
47 | /* We always generate QMAGIC files in preference to ZMAGIC files. It | |
48 | would be possible to make this a linker option, if that ever | |
49 | becomes important. */ | |
50 | ||
51 | static void MY_final_link_callback | |
52 | PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *)); | |
53 | ||
b34976b6 | 54 | static bfd_boolean sparclinux_bfd_final_link |
252b5132 RH |
55 | PARAMS ((bfd *abfd, struct bfd_link_info *info)); |
56 | ||
b34976b6 | 57 | static bfd_boolean |
252b5132 RH |
58 | sparclinux_bfd_final_link (abfd, info) |
59 | bfd *abfd; | |
60 | struct bfd_link_info *info; | |
61 | { | |
62 | obj_aout_subformat (abfd) = q_magic_format; | |
63 | return NAME(aout,final_link) (abfd, info, MY_final_link_callback); | |
64 | } | |
65 | ||
66 | #define MY_bfd_final_link sparclinux_bfd_final_link | |
67 | ||
68 | /* Set the machine type correctly. */ | |
69 | ||
b34976b6 | 70 | static bfd_boolean sparclinux_write_object_contents PARAMS ((bfd *abfd)); |
252b5132 | 71 | |
b34976b6 | 72 | static bfd_boolean |
252b5132 RH |
73 | sparclinux_write_object_contents (abfd) |
74 | bfd *abfd; | |
75 | { | |
76 | struct external_exec exec_bytes; | |
77 | struct internal_exec *execp = exec_hdr (abfd); | |
78 | ||
79 | N_SET_MACHTYPE (*execp, M_SPARC); | |
80 | ||
81 | obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; | |
82 | ||
83 | WRITE_HEADERS(abfd, execp); | |
84 | ||
b34976b6 | 85 | return TRUE; |
252b5132 RH |
86 | } |
87 | ||
88 | #define MY_write_object_contents sparclinux_write_object_contents | |
89 | /* Code to link against Linux a.out shared libraries. */ | |
90 | ||
91 | /* See if a symbol name is a reference to the global offset table. */ | |
92 | ||
93 | #ifndef GOT_REF_PREFIX | |
b34976b6 | 94 | #define GOT_REF_PREFIX "__GOT_" |
252b5132 RH |
95 | #endif |
96 | ||
97 | #define IS_GOT_SYM(name) \ | |
98 | (strncmp (name, GOT_REF_PREFIX, sizeof GOT_REF_PREFIX - 1) == 0) | |
99 | ||
7b82c249 | 100 | /* See if a symbol name is a reference to the procedure linkage table. */ |
252b5132 RH |
101 | |
102 | #ifndef PLT_REF_PREFIX | |
b34976b6 | 103 | #define PLT_REF_PREFIX "__PLT_" |
252b5132 RH |
104 | #endif |
105 | ||
106 | #define IS_PLT_SYM(name) \ | |
107 | (strncmp (name, PLT_REF_PREFIX, sizeof PLT_REF_PREFIX - 1) == 0) | |
108 | ||
109 | /* This string is used to generate specialized error messages. */ | |
110 | ||
111 | #ifndef NEEDS_SHRLIB | |
112 | #define NEEDS_SHRLIB "__NEEDS_SHRLIB_" | |
113 | #endif | |
114 | ||
115 | /* This special symbol is a set vector that contains a list of | |
116 | pointers to fixup tables. It will be present in any dynamicly | |
117 | linked file. The linker generated fixup table should also be added | |
118 | to the list, and it should always appear in the second slot (the | |
119 | first one is a dummy with a magic number that is defined in | |
120 | crt0.o). */ | |
121 | ||
122 | #ifndef SHARABLE_CONFLICTS | |
123 | #define SHARABLE_CONFLICTS "__SHARABLE_CONFLICTS__" | |
124 | #endif | |
125 | ||
126 | /* We keep a list of fixups. The terminology is a bit strange, but | |
127 | each fixup contains two 32 bit numbers. A regular fixup contains | |
128 | an address and a pointer, and at runtime we should store the | |
129 | address at the location pointed to by the pointer. A builtin fixup | |
130 | contains two pointers, and we should read the address using one | |
131 | pointer and store it at the location pointed to by the other | |
132 | pointer. Builtin fixups come into play when we have duplicate | |
133 | __GOT__ symbols for the same variable. The builtin fixup will copy | |
134 | the GOT pointer from one over into the other. */ | |
135 | ||
136 | struct fixup | |
137 | { | |
138 | struct fixup *next; | |
139 | struct linux_link_hash_entry *h; | |
140 | bfd_vma value; | |
141 | ||
142 | /* Nonzero if this is a jump instruction that needs to be fixed, | |
143 | zero if this is just a pointer */ | |
144 | char jump; | |
145 | ||
146 | char builtin; | |
147 | }; | |
148 | ||
149 | /* We don't need a special hash table entry structure, but we do need | |
150 | to keep some information between linker passes, so we use a special | |
151 | hash table. */ | |
152 | ||
153 | struct linux_link_hash_entry | |
154 | { | |
155 | struct aout_link_hash_entry root; | |
156 | }; | |
157 | ||
158 | struct linux_link_hash_table | |
159 | { | |
160 | struct aout_link_hash_table root; | |
161 | ||
162 | /* First dynamic object found in link. */ | |
163 | bfd *dynobj; | |
164 | ||
165 | /* Number of fixups. */ | |
166 | size_t fixup_count; | |
167 | ||
168 | /* Number of builtin fixups. */ | |
169 | size_t local_builtins; | |
170 | ||
171 | /* List of fixups. */ | |
172 | struct fixup *fixup_list; | |
173 | }; | |
174 | ||
175 | static struct bfd_hash_entry *linux_link_hash_newfunc | |
176 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
177 | static struct bfd_link_hash_table *linux_link_hash_table_create | |
178 | PARAMS ((bfd *)); | |
179 | static struct fixup *new_fixup | |
180 | PARAMS ((struct bfd_link_info *, struct linux_link_hash_entry *, | |
b34976b6 AM |
181 | bfd_vma, int)); |
182 | static bfd_boolean linux_link_create_dynamic_sections | |
252b5132 | 183 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 184 | static bfd_boolean linux_add_one_symbol |
252b5132 | 185 | PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword, asection *, |
b34976b6 AM |
186 | bfd_vma, const char *, bfd_boolean, bfd_boolean, |
187 | struct bfd_link_hash_entry **)); | |
188 | static bfd_boolean linux_tally_symbols | |
252b5132 | 189 | PARAMS ((struct linux_link_hash_entry *, PTR)); |
b34976b6 | 190 | static bfd_boolean linux_finish_dynamic_link |
252b5132 RH |
191 | PARAMS ((bfd *, struct bfd_link_info *)); |
192 | ||
193 | /* Routine to create an entry in an Linux link hash table. */ | |
194 | ||
195 | static struct bfd_hash_entry * | |
196 | linux_link_hash_newfunc (entry, table, string) | |
197 | struct bfd_hash_entry *entry; | |
198 | struct bfd_hash_table *table; | |
199 | const char *string; | |
200 | { | |
201 | struct linux_link_hash_entry *ret = (struct linux_link_hash_entry *) entry; | |
202 | ||
203 | /* Allocate the structure if it has not already been allocated by a | |
204 | subclass. */ | |
205 | if (ret == (struct linux_link_hash_entry *) NULL) | |
206 | ret = ((struct linux_link_hash_entry *) | |
b34976b6 | 207 | bfd_hash_allocate (table, sizeof (struct linux_link_hash_entry))); |
252b5132 RH |
208 | if (ret == NULL) |
209 | return (struct bfd_hash_entry *) ret; | |
210 | ||
211 | /* Call the allocation method of the superclass. */ | |
212 | ret = ((struct linux_link_hash_entry *) | |
b34976b6 AM |
213 | NAME(aout,link_hash_newfunc) ((struct bfd_hash_entry *) ret, |
214 | table, string)); | |
252b5132 RH |
215 | if (ret != NULL) |
216 | { | |
217 | /* Set local fields; there aren't any. */ | |
218 | } | |
219 | ||
220 | return (struct bfd_hash_entry *) ret; | |
221 | } | |
222 | ||
223 | /* Create a Linux link hash table. */ | |
224 | ||
225 | static struct bfd_link_hash_table * | |
226 | linux_link_hash_table_create (abfd) | |
227 | bfd *abfd; | |
228 | { | |
229 | struct linux_link_hash_table *ret; | |
dc810e39 | 230 | bfd_size_type amt = sizeof (struct linux_link_hash_table); |
252b5132 | 231 | |
e2d34d7d | 232 | ret = (struct linux_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
233 | if (ret == (struct linux_link_hash_table *) NULL) |
234 | return (struct bfd_link_hash_table *) NULL; | |
235 | if (! NAME(aout,link_hash_table_init) (&ret->root, abfd, | |
b34976b6 | 236 | linux_link_hash_newfunc)) |
252b5132 RH |
237 | { |
238 | free (ret); | |
239 | return (struct bfd_link_hash_table *) NULL; | |
240 | } | |
241 | ||
242 | ret->dynobj = NULL; | |
243 | ret->fixup_count = 0; | |
244 | ret->local_builtins = 0; | |
245 | ret->fixup_list = NULL; | |
246 | ||
247 | return &ret->root.root; | |
248 | } | |
249 | ||
250 | /* Look up an entry in a Linux link hash table. */ | |
251 | ||
252 | #define linux_link_hash_lookup(table, string, create, copy, follow) \ | |
253 | ((struct linux_link_hash_entry *) \ | |
254 | aout_link_hash_lookup (&(table)->root, (string), (create), (copy),\ | |
b34976b6 | 255 | (follow))) |
252b5132 RH |
256 | |
257 | /* Traverse a Linux link hash table. */ | |
258 | ||
b34976b6 AM |
259 | #define linux_link_hash_traverse(table, func, info) \ |
260 | (aout_link_hash_traverse \ | |
261 | (&(table)->root, \ | |
262 | (bfd_boolean (*) PARAMS ((struct aout_link_hash_entry *, PTR))) (func), \ | |
252b5132 RH |
263 | (info))) |
264 | ||
265 | /* Get the Linux link hash table from the info structure. This is | |
266 | just a cast. */ | |
267 | ||
268 | #define linux_hash_table(p) ((struct linux_link_hash_table *) ((p)->hash)) | |
269 | ||
270 | /* Store the information for a new fixup. */ | |
271 | ||
272 | static struct fixup * | |
273 | new_fixup (info, h, value, builtin) | |
274 | struct bfd_link_info *info; | |
275 | struct linux_link_hash_entry *h; | |
276 | bfd_vma value; | |
277 | int builtin; | |
278 | { | |
279 | struct fixup *f; | |
280 | ||
281 | f = (struct fixup *) bfd_hash_allocate (&info->hash->table, | |
b34976b6 | 282 | sizeof (struct fixup)); |
252b5132 RH |
283 | if (f == NULL) |
284 | return f; | |
285 | f->next = linux_hash_table (info)->fixup_list; | |
286 | linux_hash_table (info)->fixup_list = f; | |
287 | f->h = h; | |
288 | f->value = value; | |
289 | f->builtin = builtin; | |
290 | f->jump = 0; | |
291 | ++linux_hash_table (info)->fixup_count; | |
292 | return f; | |
293 | } | |
294 | ||
295 | /* We come here once we realize that we are going to link to a shared | |
296 | library. We need to create a special section that contains the | |
297 | fixup table, and we ultimately need to add a pointer to this into | |
298 | the set vector for SHARABLE_CONFLICTS. At this point we do not | |
299 | know the size of the section, but that's OK - we just need to | |
300 | create it for now. */ | |
301 | ||
b34976b6 | 302 | static bfd_boolean |
252b5132 RH |
303 | linux_link_create_dynamic_sections (abfd, info) |
304 | bfd *abfd; | |
5f771d47 | 305 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
306 | { |
307 | flagword flags; | |
308 | register asection *s; | |
309 | ||
310 | /* Note that we set the SEC_IN_MEMORY flag. */ | |
311 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
312 | ||
313 | /* We choose to use the name ".linux-dynamic" for the fixup table. | |
b34976b6 | 314 | Why not? */ |
252b5132 RH |
315 | s = bfd_make_section (abfd, ".linux-dynamic"); |
316 | if (s == NULL | |
317 | || ! bfd_set_section_flags (abfd, s, flags) | |
318 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
b34976b6 | 319 | return FALSE; |
252b5132 RH |
320 | s->_raw_size = 0; |
321 | s->contents = 0; | |
322 | ||
b34976b6 | 323 | return TRUE; |
252b5132 RH |
324 | } |
325 | ||
326 | /* Function to add a single symbol to the linker hash table. This is | |
327 | a wrapper around _bfd_generic_link_add_one_symbol which handles the | |
328 | tweaking needed for dynamic linking support. */ | |
329 | ||
b34976b6 | 330 | static bfd_boolean |
252b5132 | 331 | linux_add_one_symbol (info, abfd, name, flags, section, value, string, |
b34976b6 | 332 | copy, collect, hashp) |
252b5132 RH |
333 | struct bfd_link_info *info; |
334 | bfd *abfd; | |
335 | const char *name; | |
336 | flagword flags; | |
337 | asection *section; | |
338 | bfd_vma value; | |
339 | const char *string; | |
b34976b6 AM |
340 | bfd_boolean copy; |
341 | bfd_boolean collect; | |
252b5132 RH |
342 | struct bfd_link_hash_entry **hashp; |
343 | { | |
344 | struct linux_link_hash_entry *h; | |
b34976b6 | 345 | bfd_boolean insert; |
252b5132 RH |
346 | |
347 | /* Look up and see if we already have this symbol in the hash table. | |
348 | If we do, and the defining entry is from a shared library, we | |
349 | need to create the dynamic sections. | |
350 | ||
351 | FIXME: What if abfd->xvec != info->hash->creator? We may want to | |
352 | be able to link Linux a.out and ELF objects together, but serious | |
353 | confusion is possible. */ | |
354 | ||
b34976b6 | 355 | insert = FALSE; |
252b5132 | 356 | |
1049f94e | 357 | if (! info->relocatable |
252b5132 RH |
358 | && linux_hash_table (info)->dynobj == NULL |
359 | && strcmp (name, SHARABLE_CONFLICTS) == 0 | |
360 | && (flags & BSF_CONSTRUCTOR) != 0 | |
361 | && abfd->xvec == info->hash->creator) | |
362 | { | |
363 | if (! linux_link_create_dynamic_sections (abfd, info)) | |
b34976b6 | 364 | return FALSE; |
252b5132 | 365 | linux_hash_table (info)->dynobj = abfd; |
b34976b6 | 366 | insert = TRUE; |
252b5132 RH |
367 | } |
368 | ||
369 | if (bfd_is_abs_section (section) | |
370 | && abfd->xvec == info->hash->creator) | |
371 | { | |
b34976b6 AM |
372 | h = linux_link_hash_lookup (linux_hash_table (info), name, FALSE, |
373 | FALSE, FALSE); | |
252b5132 | 374 | if (h != NULL |
b34976b6 AM |
375 | && (h->root.root.type == bfd_link_hash_defined |
376 | || h->root.root.type == bfd_link_hash_defweak)) | |
377 | { | |
378 | struct fixup *f; | |
252b5132 | 379 | |
b34976b6 AM |
380 | if (hashp != NULL) |
381 | *hashp = (struct bfd_link_hash_entry *) h; | |
252b5132 | 382 | |
b34976b6 AM |
383 | f = new_fixup (info, h, value, ! IS_PLT_SYM (name)); |
384 | if (f == NULL) | |
385 | return FALSE; | |
386 | f->jump = IS_PLT_SYM (name); | |
252b5132 | 387 | |
b34976b6 AM |
388 | return TRUE; |
389 | } | |
252b5132 RH |
390 | } |
391 | ||
392 | /* Do the usual procedure for adding a symbol. */ | |
393 | if (! _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section, | |
b34976b6 AM |
394 | value, string, copy, collect, |
395 | hashp)) | |
396 | return FALSE; | |
252b5132 RH |
397 | |
398 | /* Insert a pointer to our table in the set vector. The dynamic | |
b34976b6 | 399 | linker requires this information. */ |
252b5132 RH |
400 | if (insert) |
401 | { | |
402 | asection *s; | |
403 | ||
404 | /* Here we do our special thing to add the pointer to the | |
b34976b6 | 405 | dynamic section in the SHARABLE_CONFLICTS set vector. */ |
252b5132 | 406 | s = bfd_get_section_by_name (linux_hash_table (info)->dynobj, |
b34976b6 | 407 | ".linux-dynamic"); |
252b5132 RH |
408 | BFD_ASSERT (s != NULL); |
409 | ||
410 | if (! (_bfd_generic_link_add_one_symbol | |
b34976b6 AM |
411 | (info, linux_hash_table (info)->dynobj, SHARABLE_CONFLICTS, |
412 | BSF_GLOBAL | BSF_CONSTRUCTOR, s, (bfd_vma) 0, NULL, | |
413 | FALSE, FALSE, NULL))) | |
414 | return FALSE; | |
252b5132 RH |
415 | } |
416 | ||
b34976b6 | 417 | return TRUE; |
252b5132 RH |
418 | } |
419 | ||
420 | /* We will crawl the hash table and come here for every global symbol. | |
421 | We will examine each entry and see if there are indications that we | |
422 | need to add a fixup. There are two possible cases - one is where | |
423 | you have duplicate definitions of PLT or GOT symbols - these will | |
424 | have already been caught and added as "builtin" fixups. If we find | |
425 | that the corresponding non PLT/GOT symbol is also present, we | |
426 | convert it to a regular fixup instead. | |
427 | ||
428 | This function is called via linux_link_hash_traverse. */ | |
429 | ||
b34976b6 | 430 | static bfd_boolean |
252b5132 RH |
431 | linux_tally_symbols (h, data) |
432 | struct linux_link_hash_entry *h; | |
433 | PTR data; | |
434 | { | |
435 | struct bfd_link_info *info = (struct bfd_link_info *) data; | |
436 | struct fixup *f, *f1; | |
437 | int is_plt; | |
438 | struct linux_link_hash_entry *h1, *h2; | |
b34976b6 | 439 | bfd_boolean exists; |
252b5132 | 440 | |
e92d460e AM |
441 | if (h->root.root.type == bfd_link_hash_warning) |
442 | h = (struct linux_link_hash_entry *) h->root.root.u.i.link; | |
443 | ||
252b5132 RH |
444 | if (h->root.root.type == bfd_link_hash_undefined |
445 | && strncmp (h->root.root.root.string, NEEDS_SHRLIB, | |
b34976b6 | 446 | sizeof NEEDS_SHRLIB - 1) == 0) |
252b5132 RH |
447 | { |
448 | const char *name; | |
449 | char *p; | |
450 | char *alloc = NULL; | |
451 | ||
452 | name = h->root.root.root.string + sizeof NEEDS_SHRLIB - 1; | |
453 | p = strrchr (name, '_'); | |
454 | if (p != NULL) | |
b34976b6 | 455 | alloc = (char *) bfd_malloc ((bfd_size_type) strlen (name) + 1); |
252b5132 RH |
456 | |
457 | if (p == NULL || alloc == NULL) | |
b34976b6 AM |
458 | (*_bfd_error_handler) (_("Output file requires shared library `%s'\n"), |
459 | name); | |
252b5132 | 460 | else |
b34976b6 AM |
461 | { |
462 | strcpy (alloc, name); | |
463 | p = strrchr (alloc, '_'); | |
464 | *p++ = '\0'; | |
465 | (*_bfd_error_handler) | |
466 | (_("Output file requires shared library `%s.so.%s'\n"), | |
467 | alloc, p); | |
468 | free (alloc); | |
469 | } | |
252b5132 RH |
470 | |
471 | abort (); | |
472 | } | |
473 | ||
474 | /* If this symbol is not a PLT/GOT, we do not even need to look at | |
475 | it. */ | |
476 | is_plt = IS_PLT_SYM (h->root.root.root.string); | |
477 | ||
478 | if (is_plt || IS_GOT_SYM (h->root.root.root.string)) | |
479 | { | |
480 | /* Look up this symbol twice. Once just as a regular lookup, | |
b34976b6 AM |
481 | and then again following all of the indirect links until we |
482 | reach a real symbol. */ | |
252b5132 | 483 | h1 = linux_link_hash_lookup (linux_hash_table (info), |
b34976b6 AM |
484 | (h->root.root.root.string |
485 | + sizeof PLT_REF_PREFIX - 1), | |
486 | FALSE, FALSE, TRUE); | |
7b82c249 | 487 | /* h2 does not follow indirect symbols. */ |
252b5132 | 488 | h2 = linux_link_hash_lookup (linux_hash_table (info), |
b34976b6 AM |
489 | (h->root.root.root.string |
490 | + sizeof PLT_REF_PREFIX - 1), | |
491 | FALSE, FALSE, FALSE); | |
252b5132 RH |
492 | |
493 | /* The real symbol must exist but if it is also an ABS symbol, | |
b34976b6 AM |
494 | there is no need to have a fixup. This is because they both |
495 | came from the same library. If on the other hand, we had to | |
496 | use an indirect symbol to get to the real symbol, we add the | |
497 | fixup anyway, since there are cases where these symbols come | |
498 | from different shared libraries */ | |
252b5132 | 499 | if (h1 != NULL |
b34976b6 AM |
500 | && (((h1->root.root.type == bfd_link_hash_defined |
501 | || h1->root.root.type == bfd_link_hash_defweak) | |
502 | && ! bfd_is_abs_section (h1->root.root.u.def.section)) | |
503 | || h2->root.root.type == bfd_link_hash_indirect)) | |
504 | { | |
505 | /* See if there is a "builtin" fixup already present | |
506 | involving this symbol. If so, convert it to a regular | |
507 | fixup. In the end, this relaxes some of the requirements | |
508 | about the order of performing fixups. */ | |
509 | exists = FALSE; | |
510 | for (f1 = linux_hash_table (info)->fixup_list; | |
511 | f1 != NULL; | |
512 | f1 = f1->next) | |
513 | { | |
514 | if ((f1->h != h && f1->h != h1) | |
515 | || (! f1->builtin && ! f1->jump)) | |
516 | continue; | |
517 | if (f1->h == h1) | |
518 | exists = TRUE; | |
519 | if (! exists | |
520 | && bfd_is_abs_section (h->root.root.u.def.section)) | |
521 | { | |
522 | f = new_fixup (info, h1, f1->h->root.root.u.def.value, 0); | |
523 | f->jump = is_plt; | |
524 | } | |
525 | f1->h = h1; | |
526 | f1->jump = is_plt; | |
527 | f1->builtin = 0; | |
528 | exists = TRUE; | |
529 | } | |
530 | if (! exists | |
531 | && bfd_is_abs_section (h->root.root.u.def.section)) | |
532 | { | |
533 | f = new_fixup (info, h1, h->root.root.u.def.value, 0); | |
534 | if (f == NULL) | |
535 | { | |
536 | /* FIXME: No way to return error. */ | |
537 | abort (); | |
538 | } | |
539 | f->jump = is_plt; | |
540 | } | |
541 | } | |
252b5132 RH |
542 | |
543 | /* Quick and dirty way of stripping these symbols from the | |
b34976b6 | 544 | symtab. */ |
252b5132 | 545 | if (bfd_is_abs_section (h->root.root.u.def.section)) |
b34976b6 | 546 | h->root.written = TRUE; |
252b5132 RH |
547 | } |
548 | ||
b34976b6 | 549 | return TRUE; |
252b5132 RH |
550 | } |
551 | ||
552 | /* This is called to set the size of the .linux-dynamic section is. | |
553 | It is called by the Linux linker emulation before_allocation | |
554 | routine. We have finished reading all of the input files, and now | |
555 | we just scan the hash tables to find out how many additional fixups | |
556 | are required. */ | |
557 | ||
b34976b6 | 558 | bfd_boolean |
252b5132 RH |
559 | bfd_sparclinux_size_dynamic_sections (output_bfd, info) |
560 | bfd *output_bfd; | |
561 | struct bfd_link_info *info; | |
562 | { | |
563 | struct fixup *f; | |
564 | asection *s; | |
565 | ||
566 | if (output_bfd->xvec != &MY(vec)) | |
b34976b6 | 567 | return TRUE; |
252b5132 | 568 | |
7b82c249 | 569 | /* First find the fixups... */ |
252b5132 | 570 | linux_link_hash_traverse (linux_hash_table (info), |
b34976b6 AM |
571 | linux_tally_symbols, |
572 | (PTR) info); | |
252b5132 RH |
573 | |
574 | /* If there are builtin fixups, leave room for a marker. This is | |
575 | used by the dynamic linker so that it knows that all that follow | |
576 | are builtin fixups instead of regular fixups. */ | |
577 | for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next) | |
578 | { | |
579 | if (f->builtin) | |
b34976b6 AM |
580 | { |
581 | ++linux_hash_table (info)->fixup_count; | |
582 | ++linux_hash_table (info)->local_builtins; | |
583 | break; | |
584 | } | |
252b5132 RH |
585 | } |
586 | ||
587 | if (linux_hash_table (info)->dynobj == NULL) | |
588 | { | |
589 | if (linux_hash_table (info)->fixup_count > 0) | |
b34976b6 AM |
590 | abort (); |
591 | return TRUE; | |
252b5132 RH |
592 | } |
593 | ||
594 | /* Allocate memory for our fixup table. We will fill it in later. */ | |
595 | s = bfd_get_section_by_name (linux_hash_table (info)->dynobj, | |
b34976b6 | 596 | ".linux-dynamic"); |
252b5132 RH |
597 | if (s != NULL) |
598 | { | |
dc810e39 AM |
599 | s->_raw_size = linux_hash_table (info)->fixup_count + 1; |
600 | s->_raw_size *= 8; | |
9bab7074 | 601 | s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size); |
252b5132 | 602 | if (s->contents == NULL) |
b34976b6 | 603 | return FALSE; |
252b5132 RH |
604 | } |
605 | ||
b34976b6 | 606 | return TRUE; |
252b5132 RH |
607 | } |
608 | ||
609 | /* We come here once we are ready to actually write the fixup table to | |
610 | the output file. Scan the fixup tables and so forth and generate | |
611 | the stuff we need. */ | |
612 | ||
b34976b6 | 613 | static bfd_boolean |
252b5132 RH |
614 | linux_finish_dynamic_link (output_bfd, info) |
615 | bfd *output_bfd; | |
616 | struct bfd_link_info *info; | |
617 | { | |
618 | asection *s, *os, *is; | |
619 | bfd_byte *fixup_table; | |
620 | struct linux_link_hash_entry *h; | |
621 | struct fixup *f; | |
622 | unsigned int new_addr; | |
623 | int section_offset; | |
624 | unsigned int fixups_written; | |
625 | ||
626 | if (linux_hash_table (info)->dynobj == NULL) | |
b34976b6 | 627 | return TRUE; |
252b5132 RH |
628 | |
629 | s = bfd_get_section_by_name (linux_hash_table (info)->dynobj, | |
b34976b6 | 630 | ".linux-dynamic"); |
252b5132 RH |
631 | BFD_ASSERT (s != NULL); |
632 | os = s->output_section; | |
633 | fixups_written = 0; | |
634 | ||
635 | #ifdef LINUX_LINK_DEBUG | |
636 | printf ("Fixup table file offset: %x VMA: %x\n", | |
b34976b6 AM |
637 | os->filepos + s->output_offset, |
638 | os->vma + s->output_offset); | |
252b5132 RH |
639 | #endif |
640 | ||
641 | fixup_table = s->contents; | |
dc810e39 AM |
642 | bfd_put_32 (output_bfd, |
643 | (bfd_vma) linux_hash_table (info)->fixup_count, fixup_table); | |
252b5132 RH |
644 | fixup_table += 4; |
645 | ||
646 | /* Fill in fixup table. */ | |
647 | for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next) | |
648 | { | |
649 | if (f->builtin) | |
b34976b6 | 650 | continue; |
252b5132 RH |
651 | |
652 | if (f->h->root.root.type != bfd_link_hash_defined | |
b34976b6 AM |
653 | && f->h->root.root.type != bfd_link_hash_defweak) |
654 | { | |
655 | (*_bfd_error_handler) | |
656 | (_("Symbol %s not defined for fixups\n"), | |
657 | f->h->root.root.root.string); | |
658 | continue; | |
659 | } | |
252b5132 RH |
660 | |
661 | is = f->h->root.root.u.def.section; | |
662 | section_offset = is->output_section->vma + is->output_offset; | |
663 | new_addr = f->h->root.root.u.def.value + section_offset; | |
664 | ||
665 | #ifdef LINUX_LINK_DEBUG | |
666 | printf ("Fixup(%d) %s: %x %x\n",f->jump, f->h->root.root.string, | |
b34976b6 | 667 | new_addr, f->value); |
252b5132 RH |
668 | #endif |
669 | ||
670 | if (f->jump) | |
b34976b6 AM |
671 | { |
672 | /* Relative address */ | |
673 | new_addr = new_addr - (f->value + 5); | |
674 | bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table); | |
675 | fixup_table += 4; | |
676 | bfd_put_32 (output_bfd, f->value + 1, fixup_table); | |
677 | fixup_table += 4; | |
678 | } | |
252b5132 | 679 | else |
b34976b6 AM |
680 | { |
681 | bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table); | |
682 | fixup_table += 4; | |
683 | bfd_put_32 (output_bfd, f->value, fixup_table); | |
684 | fixup_table += 4; | |
685 | } | |
252b5132 RH |
686 | ++fixups_written; |
687 | } | |
688 | ||
689 | if (linux_hash_table (info)->local_builtins != 0) | |
690 | { | |
691 | /* Special marker so we know to switch to the other type of fixup */ | |
dc810e39 | 692 | bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table); |
252b5132 | 693 | fixup_table += 4; |
dc810e39 | 694 | bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table); |
252b5132 RH |
695 | fixup_table += 4; |
696 | ++fixups_written; | |
697 | for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next) | |
b34976b6 AM |
698 | { |
699 | if (! f->builtin) | |
700 | continue; | |
701 | ||
702 | if (f->h->root.root.type != bfd_link_hash_defined | |
703 | && f->h->root.root.type != bfd_link_hash_defweak) | |
704 | { | |
705 | (*_bfd_error_handler) | |
706 | (_("Symbol %s not defined for fixups\n"), | |
707 | f->h->root.root.root.string); | |
708 | continue; | |
709 | } | |
710 | ||
711 | is = f->h->root.root.u.def.section; | |
712 | section_offset = is->output_section->vma + is->output_offset; | |
713 | new_addr = f->h->root.root.u.def.value + section_offset; | |
252b5132 RH |
714 | |
715 | #ifdef LINUX_LINK_DEBUG | |
b34976b6 AM |
716 | printf ("Fixup(B) %s: %x %x\n", f->h->root.root.string, |
717 | new_addr, f->value); | |
252b5132 RH |
718 | #endif |
719 | ||
b34976b6 AM |
720 | bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table); |
721 | fixup_table += 4; | |
722 | bfd_put_32 (output_bfd, f->value, fixup_table); | |
723 | fixup_table += 4; | |
724 | ++fixups_written; | |
725 | } | |
726 | } | |
252b5132 RH |
727 | |
728 | if (linux_hash_table (info)->fixup_count != fixups_written) | |
729 | { | |
730 | (*_bfd_error_handler) (_("Warning: fixup count mismatch\n")); | |
731 | while (linux_hash_table (info)->fixup_count > fixups_written) | |
b34976b6 AM |
732 | { |
733 | bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table); | |
734 | fixup_table += 4; | |
735 | bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table); | |
736 | fixup_table += 4; | |
737 | ++fixups_written; | |
738 | } | |
252b5132 RH |
739 | } |
740 | ||
741 | h = linux_link_hash_lookup (linux_hash_table (info), | |
b34976b6 AM |
742 | "__BUILTIN_FIXUPS__", |
743 | FALSE, FALSE, FALSE); | |
252b5132 RH |
744 | |
745 | if (h != NULL | |
746 | && (h->root.root.type == bfd_link_hash_defined | |
b34976b6 | 747 | || h->root.root.type == bfd_link_hash_defweak)) |
252b5132 RH |
748 | { |
749 | is = h->root.root.u.def.section; | |
750 | section_offset = is->output_section->vma + is->output_offset; | |
751 | new_addr = h->root.root.u.def.value + section_offset; | |
752 | ||
753 | #ifdef LINUX_LINK_DEBUG | |
754 | printf ("Builtin fixup table at %x\n", new_addr); | |
755 | #endif | |
756 | ||
dc810e39 | 757 | bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table); |
252b5132 RH |
758 | } |
759 | else | |
dc810e39 | 760 | bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table); |
252b5132 | 761 | |
dc810e39 AM |
762 | if (bfd_seek (output_bfd, (file_ptr) (os->filepos + s->output_offset), |
763 | SEEK_SET) != 0) | |
b34976b6 | 764 | return FALSE; |
252b5132 | 765 | |
b34976b6 AM |
766 | if (bfd_bwrite ((PTR) s->contents, s->_raw_size, output_bfd) != s->_raw_size) |
767 | return FALSE; | |
252b5132 | 768 | |
b34976b6 | 769 | return TRUE; |
252b5132 RH |
770 | } |
771 | ||
772 | #define MY_bfd_link_hash_table_create linux_link_hash_table_create | |
773 | #define MY_add_one_symbol linux_add_one_symbol | |
774 | #define MY_finish_dynamic_link linux_finish_dynamic_link | |
775 | ||
776 | #define MY_zmagic_contiguous 1 | |
777 | ||
778 | #include "aout-target.h" |