Commit | Line | Data |
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84e94c90 | 1 | /* Lattice Mico32-specific support for 32-bit ELF |
b3adc24a | 2 | Copyright (C) 2008-2020 Free Software Foundation, Inc. |
84e94c90 NC |
3 | Contributed by Jon Beniston <jon@beniston.com> |
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 3 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., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
21 | ||
84e94c90 | 22 | #include "sysdep.h" |
691bf19c | 23 | #include "bfd.h" |
84e94c90 NC |
24 | #include "libbfd.h" |
25 | #include "elf-bfd.h" | |
26 | #include "elf/lm32.h" | |
27 | ||
28 | #define DEFAULT_STACK_SIZE 0x20000 | |
29 | ||
30 | #define PLT_ENTRY_SIZE 20 | |
31 | ||
32 | #define PLT0_ENTRY_WORD0 0 | |
33 | #define PLT0_ENTRY_WORD1 0 | |
34 | #define PLT0_ENTRY_WORD2 0 | |
35 | #define PLT0_ENTRY_WORD3 0 | |
36 | #define PLT0_ENTRY_WORD4 0 | |
37 | ||
38 | #define PLT0_PIC_ENTRY_WORD0 0 | |
39 | #define PLT0_PIC_ENTRY_WORD1 0 | |
40 | #define PLT0_PIC_ENTRY_WORD2 0 | |
41 | #define PLT0_PIC_ENTRY_WORD3 0 | |
42 | #define PLT0_PIC_ENTRY_WORD4 0 | |
43 | ||
44 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
45 | ||
6d00b590 | 46 | extern const bfd_target lm32_elf32_fdpic_vec; |
84e94c90 | 47 | |
6d00b590 | 48 | #define IS_FDPIC(bfd) ((bfd)->xvec == &lm32_elf32_fdpic_vec) |
84e94c90 NC |
49 | |
50 | static bfd_reloc_status_type lm32_elf_gprel_reloc | |
51 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
52 | ||
84e94c90 NC |
53 | /* lm32 ELF linker hash table. */ |
54 | ||
55 | struct elf_lm32_link_hash_table | |
56 | { | |
57 | struct elf_link_hash_table root; | |
58 | ||
59 | /* Short-cuts to get to dynamic linker sections. */ | |
84e94c90 | 60 | asection *sfixup32; |
84e94c90 NC |
61 | asection *sdynbss; |
62 | asection *srelbss; | |
63 | ||
64 | int relocs32; | |
65 | }; | |
66 | ||
67 | /* Get the lm32 ELF linker hash table from a link_info structure. */ | |
68 | ||
69 | #define lm32_elf_hash_table(p) \ | |
0f55320b AM |
70 | ((is_elf_hash_table ((p)->hash) \ |
71 | && elf_hash_table_id (elf_hash_table (p)) == LM32_ELF_DATA) \ | |
72 | ? (struct elf_lm32_link_hash_table *) (p)->hash : NULL) | |
84e94c90 NC |
73 | |
74 | #define lm32fdpic_got_section(info) \ | |
ce558b89 | 75 | (lm32_elf_hash_table (info)->root.sgot) |
84e94c90 | 76 | #define lm32fdpic_gotrel_section(info) \ |
ce558b89 | 77 | (lm32_elf_hash_table (info)->root.srelgot) |
84e94c90 NC |
78 | #define lm32fdpic_fixup32_section(info) \ |
79 | (lm32_elf_hash_table (info)->sfixup32) | |
80 | ||
81 | struct weak_symbol_list | |
82 | { | |
83 | const char *name; | |
84 | struct weak_symbol_list *next; | |
85 | }; | |
86 | ||
84e94c90 NC |
87 | /* Create an lm32 ELF linker hash table. */ |
88 | ||
89 | static struct bfd_link_hash_table * | |
90 | lm32_elf_link_hash_table_create (bfd *abfd) | |
91 | { | |
92 | struct elf_lm32_link_hash_table *ret; | |
986f0783 | 93 | size_t amt = sizeof (struct elf_lm32_link_hash_table); |
84e94c90 | 94 | |
7bf52ea2 | 95 | ret = bfd_zmalloc (amt); |
84e94c90 NC |
96 | if (ret == NULL) |
97 | return NULL; | |
98 | ||
99 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, | |
190eb1dd L |
100 | _bfd_elf_link_hash_newfunc, |
101 | sizeof (struct elf_link_hash_entry), | |
4dfe6ac6 | 102 | LM32_ELF_DATA)) |
84e94c90 NC |
103 | { |
104 | free (ret); | |
105 | return NULL; | |
106 | } | |
107 | ||
84e94c90 NC |
108 | return &ret->root.root; |
109 | } | |
110 | ||
111 | /* Add a fixup to the ROFIXUP section. */ | |
112 | ||
113 | static bfd_vma | |
114 | _lm32fdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma relocation) | |
115 | { | |
116 | bfd_vma fixup_offset; | |
117 | ||
118 | if (rofixup->flags & SEC_EXCLUDE) | |
119 | return -1; | |
120 | ||
121 | fixup_offset = rofixup->reloc_count * 4; | |
122 | if (rofixup->contents) | |
123 | { | |
124 | BFD_ASSERT (fixup_offset < rofixup->size); | |
125 | if (fixup_offset < rofixup->size) | |
126 | bfd_put_32 (output_bfd, relocation, rofixup->contents + fixup_offset); | |
127 | } | |
128 | rofixup->reloc_count++; | |
129 | ||
130 | return fixup_offset; | |
131 | } | |
132 | ||
84e94c90 NC |
133 | /* Create .rofixup sections in DYNOBJ, and set up |
134 | shortcuts to them in our hash table. */ | |
135 | ||
136 | static bfd_boolean | |
137 | create_rofixup_section (bfd *dynobj, struct bfd_link_info *info) | |
138 | { | |
139 | struct elf_lm32_link_hash_table *htab; | |
140 | htab = lm32_elf_hash_table (info); | |
141 | ||
4dfe6ac6 NC |
142 | if (htab == NULL) |
143 | return FALSE; | |
144 | ||
145 | /* Fixup section for R_LM32_32 relocs. */ | |
3d4d4302 AM |
146 | lm32fdpic_fixup32_section (info) |
147 | = bfd_make_section_anyway_with_flags (dynobj, | |
148 | ".rofixup", | |
149 | (SEC_ALLOC | |
150 | | SEC_LOAD | |
151 | | SEC_HAS_CONTENTS | |
152 | | SEC_IN_MEMORY | |
153 | | SEC_LINKER_CREATED | |
154 | | SEC_READONLY)); | |
84e94c90 | 155 | if (lm32fdpic_fixup32_section (info) == NULL |
fd361982 | 156 | || !bfd_set_section_alignment (lm32fdpic_fixup32_section (info), 2)) |
84e94c90 NC |
157 | return FALSE; |
158 | ||
159 | return TRUE; | |
160 | } | |
161 | ||
162 | static reloc_howto_type lm32_elf_howto_table [] = | |
163 | { | |
164 | /* This reloc does nothing. */ | |
07d6d2b8 AM |
165 | HOWTO (R_LM32_NONE, /* type */ |
166 | 0, /* rightshift */ | |
167 | 3, /* size (0 = byte, 1 = short, 2 = long) */ | |
168 | 0, /* bitsize */ | |
169 | FALSE, /* pc_relative */ | |
170 | 0, /* bitpos */ | |
171 | complain_overflow_dont, /* complain_on_overflow */ | |
172 | bfd_elf_generic_reloc, /* special_function */ | |
173 | "R_LM32_NONE", /* name */ | |
174 | FALSE, /* partial_inplace */ | |
175 | 0, /* src_mask */ | |
176 | 0, /* dst_mask */ | |
177 | FALSE), /* pcrel_offset */ | |
84e94c90 NC |
178 | |
179 | /* An 8 bit absolute relocation. */ | |
07d6d2b8 AM |
180 | HOWTO (R_LM32_8, /* type */ |
181 | 0, /* rightshift */ | |
182 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
183 | 8, /* bitsize */ | |
184 | FALSE, /* pc_relative */ | |
185 | 0, /* bitpos */ | |
186 | complain_overflow_bitfield,/* complain_on_overflow */ | |
187 | bfd_elf_generic_reloc, /* special_function */ | |
188 | "R_LM32_8", /* name */ | |
189 | FALSE, /* partial_inplace */ | |
190 | 0, /* src_mask */ | |
191 | 0xff, /* dst_mask */ | |
192 | FALSE), /* pcrel_offset */ | |
84e94c90 NC |
193 | |
194 | /* A 16 bit absolute relocation. */ | |
07d6d2b8 AM |
195 | HOWTO (R_LM32_16, /* type */ |
196 | 0, /* rightshift */ | |
197 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
198 | 16, /* bitsize */ | |
199 | FALSE, /* pc_relative */ | |
200 | 0, /* bitpos */ | |
201 | complain_overflow_bitfield,/* complain_on_overflow */ | |
202 | bfd_elf_generic_reloc, /* special_function */ | |
203 | "R_LM32_16", /* name */ | |
204 | FALSE, /* partial_inplace */ | |
205 | 0, /* src_mask */ | |
206 | 0xffff, /* dst_mask */ | |
207 | FALSE), /* pcrel_offset */ | |
84e94c90 NC |
208 | |
209 | /* A 32 bit absolute relocation. */ | |
07d6d2b8 AM |
210 | HOWTO (R_LM32_32, /* type */ |
211 | 0, /* rightshift */ | |
212 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
213 | 32, /* bitsize */ | |
214 | FALSE, /* pc_relative */ | |
215 | 0, /* bitpos */ | |
216 | complain_overflow_bitfield,/* complain_on_overflow */ | |
217 | bfd_elf_generic_reloc, /* special_function */ | |
218 | "R_LM32_32", /* name */ | |
219 | FALSE, /* partial_inplace */ | |
220 | 0, /* src_mask */ | |
221 | 0xffffffff, /* dst_mask */ | |
222 | FALSE), /* pcrel_offset */ | |
223 | ||
224 | HOWTO (R_LM32_HI16, /* type */ | |
225 | 16, /* rightshift */ | |
226 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
227 | 16, /* bitsize */ | |
228 | FALSE, /* pc_relative */ | |
229 | 0, /* bitpos */ | |
230 | complain_overflow_bitfield,/* complain_on_overflow */ | |
231 | bfd_elf_generic_reloc, /* special_function */ | |
232 | "R_LM32_HI16", /* name */ | |
233 | FALSE, /* partial_inplace */ | |
234 | 0, /* src_mask */ | |
235 | 0xffff, /* dst_mask */ | |
236 | FALSE), /* pcrel_offset */ | |
237 | ||
238 | HOWTO (R_LM32_LO16, /* type */ | |
239 | 0, /* rightshift */ | |
240 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
241 | 16, /* bitsize */ | |
242 | FALSE, /* pc_relative */ | |
243 | 0, /* bitpos */ | |
244 | complain_overflow_dont, /* complain_on_overflow */ | |
245 | bfd_elf_generic_reloc, /* special_function */ | |
246 | "R_LM32_LO16", /* name */ | |
247 | FALSE, /* partial_inplace */ | |
248 | 0, /* src_mask */ | |
249 | 0xffff, /* dst_mask */ | |
250 | FALSE), /* pcrel_offset */ | |
251 | ||
252 | HOWTO (R_LM32_GPREL16, /* type */ | |
253 | 0, /* rightshift */ | |
254 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
255 | 16, /* bitsize */ | |
256 | FALSE, /* pc_relative */ | |
257 | 0, /* bitpos */ | |
258 | complain_overflow_dont, /* complain_on_overflow */ | |
259 | lm32_elf_gprel_reloc, /* special_function */ | |
260 | "R_LM32_GPREL16", /* name */ | |
261 | FALSE, /* partial_inplace */ | |
262 | 0, /* src_mask */ | |
263 | 0xffff, /* dst_mask */ | |
264 | FALSE), /* pcrel_offset */ | |
265 | ||
266 | HOWTO (R_LM32_CALL, /* type */ | |
267 | 2, /* rightshift */ | |
268 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
269 | 26, /* bitsize */ | |
270 | TRUE, /* pc_relative */ | |
271 | 0, /* bitpos */ | |
272 | complain_overflow_signed, /* complain_on_overflow */ | |
273 | bfd_elf_generic_reloc, /* special_function */ | |
274 | "R_LM32_CALL", /* name */ | |
275 | FALSE, /* partial_inplace */ | |
276 | 0, /* src_mask */ | |
277 | 0x3ffffff, /* dst_mask */ | |
278 | TRUE), /* pcrel_offset */ | |
279 | ||
280 | HOWTO (R_LM32_BRANCH, /* type */ | |
281 | 2, /* rightshift */ | |
282 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
283 | 16, /* bitsize */ | |
284 | TRUE, /* pc_relative */ | |
285 | 0, /* bitpos */ | |
286 | complain_overflow_signed, /* complain_on_overflow */ | |
287 | bfd_elf_generic_reloc, /* special_function */ | |
288 | "R_LM32_BRANCH", /* name */ | |
289 | FALSE, /* partial_inplace */ | |
290 | 0, /* src_mask */ | |
291 | 0xffff, /* dst_mask */ | |
292 | TRUE), /* pcrel_offset */ | |
84e94c90 NC |
293 | |
294 | /* GNU extension to record C++ vtable hierarchy. */ | |
07d6d2b8 AM |
295 | HOWTO (R_LM32_GNU_VTINHERIT, /* type */ |
296 | 0, /* rightshift */ | |
297 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
298 | 0, /* bitsize */ | |
299 | FALSE, /* pc_relative */ | |
300 | 0, /* bitpos */ | |
301 | complain_overflow_dont, /* complain_on_overflow */ | |
302 | NULL, /* special_function */ | |
303 | "R_LM32_GNU_VTINHERIT", /* name */ | |
304 | FALSE, /* partial_inplace */ | |
305 | 0, /* src_mask */ | |
306 | 0, /* dst_mask */ | |
307 | FALSE), /* pcrel_offset */ | |
84e94c90 NC |
308 | |
309 | /* GNU extension to record C++ vtable member usage. */ | |
07d6d2b8 AM |
310 | HOWTO (R_LM32_GNU_VTENTRY, /* type */ |
311 | 0, /* rightshift */ | |
312 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
313 | 0, /* bitsize */ | |
314 | FALSE, /* pc_relative */ | |
315 | 0, /* bitpos */ | |
316 | complain_overflow_dont, /* complain_on_overflow */ | |
317 | _bfd_elf_rel_vtable_reloc_fn,/* special_function */ | |
318 | "R_LM32_GNU_VTENTRY", /* name */ | |
319 | FALSE, /* partial_inplace */ | |
320 | 0, /* src_mask */ | |
321 | 0, /* dst_mask */ | |
322 | FALSE), /* pcrel_offset */ | |
323 | ||
324 | HOWTO (R_LM32_16_GOT, /* type */ | |
325 | 0, /* rightshift */ | |
326 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
327 | 16, /* bitsize */ | |
328 | FALSE, /* pc_relative */ | |
329 | 0, /* bitpos */ | |
330 | complain_overflow_signed, /* complain_on_overflow */ | |
331 | bfd_elf_generic_reloc, /* special_function */ | |
332 | "R_LM32_16_GOT", /* name */ | |
333 | FALSE, /* partial_inplace */ | |
334 | 0, /* src_mask */ | |
335 | 0xffff, /* dst_mask */ | |
336 | FALSE), /* pcrel_offset */ | |
337 | ||
338 | HOWTO (R_LM32_GOTOFF_HI16, /* type */ | |
339 | 16, /* rightshift */ | |
340 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
341 | 16, /* bitsize */ | |
342 | FALSE, /* pc_relative */ | |
343 | 0, /* bitpos */ | |
344 | complain_overflow_dont, /* complain_on_overflow */ | |
345 | bfd_elf_generic_reloc, /* special_function */ | |
346 | "R_LM32_GOTOFF_HI16", /* name */ | |
347 | FALSE, /* partial_inplace */ | |
348 | 0xffff, /* src_mask */ | |
349 | 0xffff, /* dst_mask */ | |
350 | FALSE), /* pcrel_offset */ | |
351 | ||
352 | HOWTO (R_LM32_GOTOFF_LO16, /* type */ | |
353 | 0, /* rightshift */ | |
354 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
355 | 16, /* bitsize */ | |
356 | FALSE, /* pc_relative */ | |
357 | 0, /* bitpos */ | |
358 | complain_overflow_dont, /* complain_on_overflow */ | |
359 | bfd_elf_generic_reloc, /* special_function */ | |
360 | "R_LM32_GOTOFF_LO16", /* name */ | |
361 | FALSE, /* partial_inplace */ | |
362 | 0xffff, /* src_mask */ | |
363 | 0xffff, /* dst_mask */ | |
364 | FALSE), /* pcrel_offset */ | |
84e94c90 NC |
365 | |
366 | HOWTO (R_LM32_COPY, /* type */ | |
367 | 0, /* rightshift */ | |
368 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
369 | 32, /* bitsize */ | |
370 | FALSE, /* pc_relative */ | |
371 | 0, /* bitpos */ | |
372 | complain_overflow_bitfield, /* complain_on_overflow */ | |
373 | bfd_elf_generic_reloc, /* special_function */ | |
374 | "R_LM32_COPY", /* name */ | |
375 | FALSE, /* partial_inplace */ | |
376 | 0xffffffff, /* src_mask */ | |
377 | 0xffffffff, /* dst_mask */ | |
378 | FALSE), /* pcrel_offset */ | |
379 | ||
380 | HOWTO (R_LM32_GLOB_DAT, /* type */ | |
381 | 0, /* rightshift */ | |
382 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
383 | 32, /* bitsize */ | |
384 | FALSE, /* pc_relative */ | |
385 | 0, /* bitpos */ | |
386 | complain_overflow_bitfield, /* complain_on_overflow */ | |
387 | bfd_elf_generic_reloc, /* special_function */ | |
388 | "R_LM32_GLOB_DAT", /* name */ | |
389 | FALSE, /* partial_inplace */ | |
390 | 0xffffffff, /* src_mask */ | |
391 | 0xffffffff, /* dst_mask */ | |
392 | FALSE), /* pcrel_offset */ | |
393 | ||
394 | HOWTO (R_LM32_JMP_SLOT, /* type */ | |
395 | 0, /* rightshift */ | |
396 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
397 | 32, /* bitsize */ | |
398 | FALSE, /* pc_relative */ | |
399 | 0, /* bitpos */ | |
400 | complain_overflow_bitfield, /* complain_on_overflow */ | |
401 | bfd_elf_generic_reloc, /* special_function */ | |
402 | "R_LM32_JMP_SLOT", /* name */ | |
403 | FALSE, /* partial_inplace */ | |
404 | 0xffffffff, /* src_mask */ | |
405 | 0xffffffff, /* dst_mask */ | |
406 | FALSE), /* pcrel_offset */ | |
407 | ||
408 | HOWTO (R_LM32_RELATIVE, /* type */ | |
409 | 0, /* rightshift */ | |
410 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
411 | 32, /* bitsize */ | |
412 | FALSE, /* pc_relative */ | |
413 | 0, /* bitpos */ | |
414 | complain_overflow_bitfield, /* complain_on_overflow */ | |
415 | bfd_elf_generic_reloc, /* special_function */ | |
416 | "R_LM32_RELATIVE", /* name */ | |
417 | FALSE, /* partial_inplace */ | |
418 | 0xffffffff, /* src_mask */ | |
419 | 0xffffffff, /* dst_mask */ | |
420 | FALSE), /* pcrel_offset */ | |
421 | ||
422 | }; | |
423 | ||
424 | /* Map BFD reloc types to lm32 ELF reloc types. */ | |
425 | ||
426 | struct lm32_reloc_map | |
427 | { | |
428 | bfd_reloc_code_real_type bfd_reloc_val; | |
429 | unsigned char elf_reloc_val; | |
430 | }; | |
431 | ||
432 | static const struct lm32_reloc_map lm32_reloc_map[] = | |
433 | { | |
07d6d2b8 AM |
434 | { BFD_RELOC_NONE, R_LM32_NONE }, |
435 | { BFD_RELOC_8, R_LM32_8 }, | |
436 | { BFD_RELOC_16, R_LM32_16 }, | |
437 | { BFD_RELOC_32, R_LM32_32 }, | |
438 | { BFD_RELOC_HI16, R_LM32_HI16 }, | |
439 | { BFD_RELOC_LO16, R_LM32_LO16 }, | |
440 | { BFD_RELOC_GPREL16, R_LM32_GPREL16 }, | |
441 | { BFD_RELOC_LM32_CALL, R_LM32_CALL }, | |
442 | { BFD_RELOC_LM32_BRANCH, R_LM32_BRANCH }, | |
443 | { BFD_RELOC_VTABLE_INHERIT, R_LM32_GNU_VTINHERIT }, | |
444 | { BFD_RELOC_VTABLE_ENTRY, R_LM32_GNU_VTENTRY }, | |
445 | { BFD_RELOC_LM32_16_GOT, R_LM32_16_GOT }, | |
84e94c90 NC |
446 | { BFD_RELOC_LM32_GOTOFF_HI16, R_LM32_GOTOFF_HI16 }, |
447 | { BFD_RELOC_LM32_GOTOFF_LO16, R_LM32_GOTOFF_LO16 }, | |
07d6d2b8 AM |
448 | { BFD_RELOC_LM32_COPY, R_LM32_COPY }, |
449 | { BFD_RELOC_LM32_GLOB_DAT, R_LM32_GLOB_DAT }, | |
450 | { BFD_RELOC_LM32_JMP_SLOT, R_LM32_JMP_SLOT }, | |
451 | { BFD_RELOC_LM32_RELATIVE, R_LM32_RELATIVE }, | |
84e94c90 NC |
452 | }; |
453 | ||
454 | static reloc_howto_type * | |
455 | lm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
07d6d2b8 | 456 | bfd_reloc_code_real_type code) |
84e94c90 NC |
457 | { |
458 | unsigned int i; | |
459 | ||
460 | for (i = 0; i < sizeof (lm32_reloc_map) / sizeof (lm32_reloc_map[0]); i++) | |
461 | if (lm32_reloc_map[i].bfd_reloc_val == code) | |
462 | return &lm32_elf_howto_table[lm32_reloc_map[i].elf_reloc_val]; | |
463 | return NULL; | |
464 | } | |
465 | ||
466 | static reloc_howto_type * | |
467 | lm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
468 | const char *r_name) | |
469 | { | |
470 | unsigned int i; | |
471 | ||
472 | for (i = 0; | |
473 | i < sizeof (lm32_elf_howto_table) / sizeof (lm32_elf_howto_table[0]); | |
474 | i++) | |
475 | if (lm32_elf_howto_table[i].name != NULL | |
476 | && strcasecmp (lm32_elf_howto_table[i].name, r_name) == 0) | |
477 | return &lm32_elf_howto_table[i]; | |
478 | ||
479 | return NULL; | |
480 | } | |
481 | ||
482 | ||
483 | /* Set the howto pointer for an Lattice Mico32 ELF reloc. */ | |
484 | ||
f3185997 | 485 | static bfd_boolean |
0aa13fee | 486 | lm32_info_to_howto_rela (bfd *abfd, |
07d6d2b8 AM |
487 | arelent *cache_ptr, |
488 | Elf_Internal_Rela *dst) | |
84e94c90 NC |
489 | { |
490 | unsigned int r_type; | |
491 | ||
492 | r_type = ELF32_R_TYPE (dst->r_info); | |
5860e3f8 NC |
493 | if (r_type >= (unsigned int) R_LM32_max) |
494 | { | |
695344c0 | 495 | /* xgettext:c-format */ |
0aa13fee AM |
496 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
497 | abfd, r_type); | |
f3185997 NC |
498 | bfd_set_error (bfd_error_bad_value); |
499 | return FALSE; | |
5860e3f8 | 500 | } |
84e94c90 | 501 | cache_ptr->howto = &lm32_elf_howto_table[r_type]; |
f3185997 | 502 | return TRUE; |
84e94c90 NC |
503 | } |
504 | ||
505 | /* Set the right machine number for an Lattice Mico32 ELF file. */ | |
506 | ||
507 | static bfd_boolean | |
508 | lm32_elf_object_p (bfd *abfd) | |
509 | { | |
510 | return bfd_default_set_arch_mach (abfd, bfd_arch_lm32, bfd_mach_lm32); | |
511 | } | |
512 | ||
513 | /* Set machine type flags just before file is written out. */ | |
514 | ||
cc364be6 AM |
515 | static bfd_boolean |
516 | lm32_elf_final_write_processing (bfd *abfd) | |
84e94c90 NC |
517 | { |
518 | elf_elfheader (abfd)->e_machine = EM_LATTICEMICO32; | |
519 | elf_elfheader (abfd)->e_flags &=~ EF_LM32_MACH; | |
520 | switch (bfd_get_mach (abfd)) | |
521 | { | |
522 | case bfd_mach_lm32: | |
07d6d2b8 AM |
523 | elf_elfheader (abfd)->e_flags |= E_LM32_MACH; |
524 | break; | |
84e94c90 | 525 | default: |
07d6d2b8 | 526 | abort (); |
84e94c90 | 527 | } |
cc364be6 | 528 | return _bfd_elf_final_write_processing (abfd); |
84e94c90 NC |
529 | } |
530 | ||
531 | /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a | |
532 | dangerous relocation. */ | |
533 | ||
534 | static bfd_boolean | |
535 | lm32_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp) | |
536 | { | |
537 | unsigned int count; | |
538 | asymbol **sym; | |
539 | unsigned int i; | |
540 | ||
541 | /* If we've already figured out what GP will be, just return it. */ | |
542 | *pgp = _bfd_get_gp_value (output_bfd); | |
543 | if (*pgp) | |
544 | return TRUE; | |
545 | ||
546 | count = bfd_get_symcount (output_bfd); | |
547 | sym = bfd_get_outsymbols (output_bfd); | |
548 | ||
549 | /* The linker script will have created a symbol named `_gp' with the | |
550 | appropriate value. */ | |
551 | if (sym == NULL) | |
552 | i = count; | |
553 | else | |
554 | { | |
555 | for (i = 0; i < count; i++, sym++) | |
556 | { | |
557 | const char *name; | |
558 | ||
559 | name = bfd_asymbol_name (*sym); | |
560 | if (*name == '_' && strcmp (name, "_gp") == 0) | |
561 | { | |
562 | *pgp = bfd_asymbol_value (*sym); | |
563 | _bfd_set_gp_value (output_bfd, *pgp); | |
564 | break; | |
565 | } | |
566 | } | |
567 | } | |
568 | ||
569 | if (i >= count) | |
570 | { | |
571 | /* Only get the error once. */ | |
572 | *pgp = 4; | |
573 | _bfd_set_gp_value (output_bfd, *pgp); | |
574 | return FALSE; | |
575 | } | |
576 | ||
577 | return TRUE; | |
578 | } | |
579 | ||
580 | /* We have to figure out the gp value, so that we can adjust the | |
581 | symbol value correctly. We look up the symbol _gp in the output | |
582 | BFD. If we can't find it, we're stuck. We cache it in the ELF | |
583 | target data. We don't need to adjust the symbol value for an | |
584 | external symbol if we are producing relocatable output. */ | |
585 | ||
586 | static bfd_reloc_status_type | |
587 | lm32_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable, | |
07d6d2b8 | 588 | char **error_message, bfd_vma *pgp) |
84e94c90 NC |
589 | { |
590 | if (bfd_is_und_section (symbol->section) && !relocatable) | |
591 | { | |
592 | *pgp = 0; | |
593 | return bfd_reloc_undefined; | |
594 | } | |
595 | ||
596 | *pgp = _bfd_get_gp_value (output_bfd); | |
597 | if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)) | |
598 | { | |
599 | if (relocatable) | |
600 | { | |
601 | /* Make up a value. */ | |
602 | *pgp = symbol->section->output_section->vma + 0x4000; | |
603 | _bfd_set_gp_value (output_bfd, *pgp); | |
604 | } | |
605 | else if (!lm32_elf_assign_gp (output_bfd, pgp)) | |
606 | { | |
607 | *error_message = | |
608 | (char *) | |
609 | _("global pointer relative relocation when _gp not defined"); | |
610 | return bfd_reloc_dangerous; | |
611 | } | |
612 | } | |
613 | ||
614 | return bfd_reloc_ok; | |
615 | } | |
616 | ||
617 | static bfd_reloc_status_type | |
618 | lm32_elf_do_gprel_relocate (bfd *abfd, | |
619 | reloc_howto_type *howto, | |
620 | asection *input_section ATTRIBUTE_UNUSED, | |
621 | bfd_byte *data, | |
622 | bfd_vma offset, | |
623 | bfd_vma symbol_value, | |
624 | bfd_vma addend) | |
625 | { | |
626 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
627 | data, offset, symbol_value, addend); | |
628 | } | |
629 | ||
630 | static bfd_reloc_status_type | |
631 | lm32_elf_gprel_reloc (bfd *abfd, | |
632 | arelent *reloc_entry, | |
633 | asymbol *symbol, | |
634 | void *data, | |
635 | asection *input_section, | |
636 | bfd *output_bfd, | |
637 | char **msg) | |
638 | { | |
639 | bfd_vma relocation; | |
640 | bfd_vma gp; | |
641 | bfd_reloc_status_type r; | |
642 | ||
643 | if (output_bfd != (bfd *) NULL | |
644 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
645 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
646 | { | |
647 | reloc_entry->address += input_section->output_offset; | |
648 | return bfd_reloc_ok; | |
649 | } | |
650 | ||
651 | if (output_bfd != NULL) | |
652 | return bfd_reloc_ok; | |
653 | ||
654 | relocation = symbol->value | |
655 | + symbol->section->output_section->vma + symbol->section->output_offset; | |
656 | ||
657 | if ((r = | |
658 | lm32_elf_final_gp (abfd, symbol, FALSE, msg, &gp)) == bfd_reloc_ok) | |
659 | { | |
660 | relocation = relocation + reloc_entry->addend - gp; | |
661 | reloc_entry->addend = 0; | |
662 | if ((signed) relocation < -32768 || (signed) relocation > 32767) | |
663 | { | |
664 | *msg = _("global pointer relative address out of range"); | |
665 | r = bfd_reloc_outofrange; | |
666 | } | |
667 | else | |
668 | { | |
669 | r = lm32_elf_do_gprel_relocate (abfd, reloc_entry->howto, | |
670 | input_section, | |
671 | data, reloc_entry->address, | |
672 | relocation, reloc_entry->addend); | |
673 | } | |
674 | } | |
675 | ||
676 | return r; | |
677 | } | |
678 | ||
679 | /* Find the segment number in which OSEC, and output section, is | |
680 | located. */ | |
681 | ||
682 | static unsigned | |
683 | _lm32fdpic_osec_to_segment (bfd *output_bfd, asection *osec) | |
684 | { | |
685 | struct elf_segment_map *m; | |
686 | Elf_Internal_Phdr *p; | |
687 | ||
688 | /* Find the segment that contains the output_section. */ | |
12bd6957 | 689 | for (m = elf_seg_map (output_bfd), p = elf_tdata (output_bfd)->phdr; |
84e94c90 NC |
690 | m != NULL; |
691 | m = m->next, p++) | |
692 | { | |
693 | int i; | |
694 | ||
695 | for (i = m->count - 1; i >= 0; i--) | |
696 | if (m->sections[i] == osec) | |
697 | break; | |
698 | ||
699 | if (i >= 0) | |
700 | break; | |
701 | } | |
702 | ||
703 | return p - elf_tdata (output_bfd)->phdr; | |
704 | } | |
705 | ||
706 | /* Determine if an output section is read-only. */ | |
707 | ||
708 | inline static bfd_boolean | |
709 | _lm32fdpic_osec_readonly_p (bfd *output_bfd, asection *osec) | |
710 | { | |
711 | unsigned seg = _lm32fdpic_osec_to_segment (output_bfd, osec); | |
712 | ||
713 | return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W); | |
714 | } | |
715 | ||
716 | /* Relocate a section */ | |
717 | ||
718 | static bfd_boolean | |
719 | lm32_elf_relocate_section (bfd *output_bfd, | |
07d6d2b8 AM |
720 | struct bfd_link_info *info, |
721 | bfd *input_bfd, | |
722 | asection *input_section, | |
723 | bfd_byte *contents, | |
724 | Elf_Internal_Rela *relocs, | |
725 | Elf_Internal_Sym *local_syms, | |
726 | asection **local_sections) | |
84e94c90 NC |
727 | { |
728 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
729 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); | |
730 | Elf_Internal_Rela *rel, *relend; | |
84e94c90 | 731 | struct elf_lm32_link_hash_table *htab = lm32_elf_hash_table (info); |
84e94c90 | 732 | bfd_vma *local_got_offsets; |
c7e2358a | 733 | asection *sgot; |
84e94c90 | 734 | |
4dfe6ac6 NC |
735 | if (htab == NULL) |
736 | return FALSE; | |
737 | ||
84e94c90 NC |
738 | local_got_offsets = elf_local_got_offsets (input_bfd); |
739 | ||
ce558b89 | 740 | sgot = htab->root.sgot; |
84e94c90 NC |
741 | |
742 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
743 | sym_hashes = elf_sym_hashes (input_bfd); | |
744 | ||
745 | rel = relocs; | |
746 | relend = relocs + input_section->reloc_count; | |
747 | for (; rel < relend; rel++) | |
748 | { | |
749 | reloc_howto_type *howto; | |
750 | unsigned int r_type; | |
751 | unsigned long r_symndx; | |
752 | Elf_Internal_Sym *sym; | |
753 | asection *sec; | |
754 | struct elf_link_hash_entry *h; | |
755 | bfd_vma relocation; | |
756 | bfd_vma gp; | |
757 | bfd_reloc_status_type r; | |
758 | const char *name = NULL; | |
84e94c90 NC |
759 | |
760 | r_symndx = ELF32_R_SYM (rel->r_info); | |
761 | r_type = ELF32_R_TYPE (rel->r_info); | |
762 | ||
763 | if (r_type == R_LM32_GNU_VTENTRY | |
07d6d2b8 AM |
764 | || r_type == R_LM32_GNU_VTINHERIT ) |
765 | continue; | |
84e94c90 NC |
766 | |
767 | h = NULL; | |
768 | sym = NULL; | |
769 | sec = NULL; | |
770 | ||
771 | howto = lm32_elf_howto_table + r_type; | |
772 | ||
773 | if (r_symndx < symtab_hdr->sh_info) | |
07d6d2b8 AM |
774 | { |
775 | /* It's a local symbol. */ | |
776 | sym = local_syms + r_symndx; | |
777 | sec = local_sections[r_symndx]; | |
778 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
779 | name = bfd_elf_string_from_elf_section | |
84e94c90 | 780 | (input_bfd, symtab_hdr->sh_link, sym->st_name); |
fd361982 | 781 | name = name == NULL ? bfd_section_name (sec) : name; |
07d6d2b8 | 782 | } |
84e94c90 | 783 | else |
07d6d2b8 AM |
784 | { |
785 | /* It's a global symbol. */ | |
786 | bfd_boolean unresolved_reloc; | |
62d887d4 | 787 | bfd_boolean warned, ignored; |
84e94c90 NC |
788 | |
789 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
790 | r_symndx, symtab_hdr, sym_hashes, | |
791 | h, sec, relocation, | |
62d887d4 | 792 | unresolved_reloc, warned, ignored); |
84e94c90 | 793 | name = h->root.root.string; |
07d6d2b8 | 794 | } |
84e94c90 | 795 | |
dbaa2011 | 796 | if (sec != NULL && discarded_section (sec)) |
e4067dbb | 797 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 798 | rel, 1, relend, howto, 0, contents); |
84e94c90 | 799 | |
0e1862bb | 800 | if (bfd_link_relocatable (info)) |
07d6d2b8 | 801 | { |
84e94c90 NC |
802 | /* This is a relocatable link. We don't have to change |
803 | anything, unless the reloc is against a section symbol, | |
804 | in which case we have to adjust according to where the | |
805 | section symbol winds up in the output section. */ | |
806 | if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
807 | continue; | |
808 | ||
809 | /* If partial_inplace, we need to store any additional addend | |
810 | back in the section. */ | |
811 | if (! howto->partial_inplace) | |
812 | continue; | |
813 | ||
07d6d2b8 | 814 | /* Shouldn't reach here. */ |
84e94c90 NC |
815 | abort (); |
816 | r = bfd_reloc_ok; | |
07d6d2b8 | 817 | } |
84e94c90 | 818 | else |
07d6d2b8 AM |
819 | { |
820 | switch (howto->type) | |
821 | { | |
822 | case R_LM32_GPREL16: | |
823 | if (!lm32_elf_assign_gp (output_bfd, &gp)) | |
824 | r = bfd_reloc_dangerous; | |
825 | else | |
826 | { | |
827 | relocation = relocation + rel->r_addend - gp; | |
828 | rel->r_addend = 0; | |
829 | if ((signed)relocation < -32768 || (signed)relocation > 32767) | |
830 | r = bfd_reloc_outofrange; | |
831 | else | |
832 | { | |
833 | r = _bfd_final_link_relocate (howto, input_bfd, | |
834 | input_section, contents, | |
835 | rel->r_offset, relocation, | |
836 | rel->r_addend); | |
837 | } | |
838 | } | |
839 | break; | |
840 | case R_LM32_16_GOT: | |
841 | /* Relocation is to the entry for this symbol in the global | |
842 | offset table. */ | |
843 | BFD_ASSERT (sgot != NULL); | |
844 | if (h != NULL) | |
845 | { | |
846 | bfd_boolean dyn; | |
847 | bfd_vma off; | |
848 | ||
849 | off = h->got.offset; | |
850 | BFD_ASSERT (off != (bfd_vma) -1); | |
851 | ||
852 | dyn = htab->root.dynamic_sections_created; | |
853 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, | |
0e1862bb L |
854 | bfd_link_pic (info), |
855 | h) | |
07d6d2b8 AM |
856 | || (bfd_link_pic (info) |
857 | && (info->symbolic | |
858 | || h->dynindx == -1 | |
859 | || h->forced_local) | |
860 | && h->def_regular)) | |
861 | { | |
862 | /* This is actually a static link, or it is a | |
863 | -Bsymbolic link and the symbol is defined | |
864 | locally, or the symbol was forced to be local | |
865 | because of a version file. We must initialize | |
866 | this entry in the global offset table. Since the | |
867 | offset must always be a multiple of 4, we use the | |
868 | least significant bit to record whether we have | |
869 | initialized it already. | |
870 | ||
871 | When doing a dynamic link, we create a .rela.got | |
872 | relocation entry to initialize the value. This | |
873 | is done in the finish_dynamic_symbol routine. */ | |
874 | if ((off & 1) != 0) | |
875 | off &= ~1; | |
876 | else | |
877 | { | |
878 | /* Write entry in GOT */ | |
879 | bfd_put_32 (output_bfd, relocation, | |
880 | sgot->contents + off); | |
881 | /* Create entry in .rofixup pointing to GOT entry. */ | |
882 | if (IS_FDPIC (output_bfd) && h->root.type != bfd_link_hash_undefweak) | |
883 | { | |
884 | _lm32fdpic_add_rofixup (output_bfd, | |
885 | lm32fdpic_fixup32_section | |
886 | (info), | |
887 | sgot->output_section->vma | |
888 | + sgot->output_offset | |
889 | + off); | |
890 | } | |
891 | /* Mark GOT entry as having been written. */ | |
892 | h->got.offset |= 1; | |
893 | } | |
894 | } | |
895 | ||
896 | relocation = sgot->output_offset + off; | |
897 | } | |
898 | else | |
899 | { | |
900 | bfd_vma off; | |
901 | bfd_byte *loc; | |
902 | ||
903 | BFD_ASSERT (local_got_offsets != NULL | |
904 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
905 | ||
906 | /* Get offset into GOT table. */ | |
907 | off = local_got_offsets[r_symndx]; | |
908 | ||
909 | /* The offset must always be a multiple of 4. We use | |
910 | the least significant bit to record whether we have | |
911 | already processed this entry. */ | |
912 | if ((off & 1) != 0) | |
913 | off &= ~1; | |
914 | else | |
915 | { | |
916 | /* Write entry in GOT. */ | |
917 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); | |
918 | /* Create entry in .rofixup pointing to GOT entry. */ | |
919 | if (IS_FDPIC (output_bfd)) | |
920 | { | |
921 | _lm32fdpic_add_rofixup (output_bfd, | |
922 | lm32fdpic_fixup32_section | |
923 | (info), | |
924 | sgot->output_section->vma | |
925 | + sgot->output_offset | |
926 | + off); | |
927 | } | |
928 | ||
929 | if (bfd_link_pic (info)) | |
930 | { | |
931 | asection *srelgot; | |
932 | Elf_Internal_Rela outrel; | |
933 | ||
934 | /* We need to generate a R_LM32_RELATIVE reloc | |
935 | for the dynamic linker. */ | |
936 | srelgot = htab->root.srelgot; | |
937 | BFD_ASSERT (srelgot != NULL); | |
938 | ||
939 | outrel.r_offset = (sgot->output_section->vma | |
940 | + sgot->output_offset | |
941 | + off); | |
942 | outrel.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); | |
943 | outrel.r_addend = relocation; | |
944 | loc = srelgot->contents; | |
945 | loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); | |
946 | bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); | |
947 | ++srelgot->reloc_count; | |
948 | } | |
949 | ||
950 | local_got_offsets[r_symndx] |= 1; | |
951 | } | |
952 | ||
953 | ||
954 | relocation = sgot->output_offset + off; | |
955 | } | |
956 | ||
957 | /* Addend should be zero. */ | |
958 | if (rel->r_addend != 0) | |
38f14ab8 AM |
959 | _bfd_error_handler |
960 | (_("internal error: addend should be zero for %s"), | |
961 | "R_LM32_16_GOT"); | |
84e94c90 | 962 | |
07d6d2b8 AM |
963 | r = _bfd_final_link_relocate (howto, |
964 | input_bfd, | |
965 | input_section, | |
966 | contents, | |
967 | rel->r_offset, | |
968 | relocation, | |
969 | rel->r_addend); | |
970 | break; | |
971 | ||
972 | case R_LM32_GOTOFF_LO16: | |
973 | case R_LM32_GOTOFF_HI16: | |
974 | /* Relocation is offset from GOT. */ | |
84e94c90 NC |
975 | BFD_ASSERT (sgot != NULL); |
976 | relocation -= sgot->output_section->vma; | |
977 | /* Account for sign-extension. */ | |
07d6d2b8 AM |
978 | if ((r_type == R_LM32_GOTOFF_HI16) |
979 | && ((relocation + rel->r_addend) & 0x8000)) | |
980 | rel->r_addend += 0x10000; | |
981 | r = _bfd_final_link_relocate (howto, | |
982 | input_bfd, | |
983 | input_section, | |
984 | contents, | |
985 | rel->r_offset, | |
986 | relocation, | |
987 | rel->r_addend); | |
988 | break; | |
989 | ||
990 | case R_LM32_32: | |
991 | if (IS_FDPIC (output_bfd)) | |
992 | { | |
993 | if ((!h) || (h && h->root.type != bfd_link_hash_undefweak)) | |
994 | { | |
995 | /* Only create .rofixup entries for relocs in loadable sections. */ | |
fd361982 | 996 | if ((bfd_section_flags (input_section->output_section) |
07d6d2b8 AM |
997 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
998 | ||
999 | { | |
1000 | /* Check address to be modified is writable. */ | |
1001 | if (_lm32fdpic_osec_readonly_p (output_bfd, | |
1002 | input_section | |
1003 | ->output_section)) | |
1004 | { | |
1005 | info->callbacks->warning | |
1006 | (info, | |
1007 | _("cannot emit dynamic relocations in read-only section"), | |
1008 | name, input_bfd, input_section, rel->r_offset); | |
1009 | return FALSE; | |
1010 | } | |
1011 | /* Create entry in .rofixup section. */ | |
1012 | _lm32fdpic_add_rofixup (output_bfd, | |
1013 | lm32fdpic_fixup32_section (info), | |
1014 | input_section->output_section->vma | |
1015 | + input_section->output_offset | |
1016 | + rel->r_offset); | |
1017 | } | |
1018 | } | |
1019 | } | |
1020 | /* Fall through. */ | |
1021 | ||
1022 | default: | |
1023 | r = _bfd_final_link_relocate (howto, | |
1024 | input_bfd, | |
1025 | input_section, | |
1026 | contents, | |
1027 | rel->r_offset, | |
1028 | relocation, | |
1029 | rel->r_addend); | |
1030 | break; | |
1031 | } | |
1032 | } | |
84e94c90 NC |
1033 | |
1034 | if (r != bfd_reloc_ok) | |
07d6d2b8 AM |
1035 | { |
1036 | const char *msg = NULL; | |
1037 | arelent bfd_reloc; | |
1038 | ||
f3185997 NC |
1039 | if (! lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel)) |
1040 | continue; | |
07d6d2b8 AM |
1041 | howto = bfd_reloc.howto; |
1042 | ||
1043 | if (h != NULL) | |
1044 | name = h->root.root.string; | |
1045 | else | |
1046 | { | |
1047 | name = (bfd_elf_string_from_elf_section | |
1048 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
1049 | if (name == NULL || *name == '\0') | |
fd361982 | 1050 | name = bfd_section_name (sec); |
07d6d2b8 AM |
1051 | } |
1052 | ||
1053 | switch (r) | |
1054 | { | |
84e94c90 NC |
1055 | case bfd_reloc_overflow: |
1056 | if ((h != NULL) | |
07d6d2b8 AM |
1057 | && (h->root.type == bfd_link_hash_undefweak)) |
1058 | break; | |
1a72702b AM |
1059 | (*info->callbacks->reloc_overflow) |
1060 | (info, (h ? &h->root : NULL), name, howto->name, | |
1061 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
84e94c90 NC |
1062 | break; |
1063 | ||
07d6d2b8 | 1064 | case bfd_reloc_undefined: |
1a72702b AM |
1065 | (*info->callbacks->undefined_symbol) |
1066 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
07d6d2b8 | 1067 | break; |
84e94c90 | 1068 | |
07d6d2b8 AM |
1069 | case bfd_reloc_outofrange: |
1070 | msg = _("internal error: out of range error"); | |
1071 | goto common_error; | |
84e94c90 | 1072 | |
07d6d2b8 AM |
1073 | case bfd_reloc_notsupported: |
1074 | msg = _("internal error: unsupported relocation error"); | |
1075 | goto common_error; | |
84e94c90 | 1076 | |
07d6d2b8 AM |
1077 | case bfd_reloc_dangerous: |
1078 | msg = _("internal error: dangerous error"); | |
1079 | goto common_error; | |
84e94c90 | 1080 | |
07d6d2b8 AM |
1081 | default: |
1082 | msg = _("internal error: unknown error"); | |
1083 | /* fall through */ | |
84e94c90 | 1084 | |
07d6d2b8 | 1085 | common_error: |
1a72702b AM |
1086 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
1087 | input_section, rel->r_offset); | |
07d6d2b8 AM |
1088 | break; |
1089 | } | |
1090 | } | |
84e94c90 NC |
1091 | } |
1092 | ||
1093 | return TRUE; | |
1094 | } | |
1095 | ||
1096 | static asection * | |
1097 | lm32_elf_gc_mark_hook (asection *sec, | |
07d6d2b8 AM |
1098 | struct bfd_link_info *info, |
1099 | Elf_Internal_Rela *rel, | |
1100 | struct elf_link_hash_entry *h, | |
1101 | Elf_Internal_Sym *sym) | |
84e94c90 NC |
1102 | { |
1103 | if (h != NULL) | |
1104 | switch (ELF32_R_TYPE (rel->r_info)) | |
1105 | { | |
1106 | case R_LM32_GNU_VTINHERIT: | |
1107 | case R_LM32_GNU_VTENTRY: | |
1108 | return NULL; | |
1109 | } | |
1110 | ||
1111 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
1112 | } | |
1113 | ||
84e94c90 NC |
1114 | /* Look through the relocs for a section during the first phase. */ |
1115 | ||
1116 | static bfd_boolean | |
1117 | lm32_elf_check_relocs (bfd *abfd, | |
07d6d2b8 AM |
1118 | struct bfd_link_info *info, |
1119 | asection *sec, | |
1120 | const Elf_Internal_Rela *relocs) | |
84e94c90 NC |
1121 | { |
1122 | Elf_Internal_Shdr *symtab_hdr; | |
1123 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
1124 | const Elf_Internal_Rela *rel; | |
1125 | const Elf_Internal_Rela *rel_end; | |
1126 | struct elf_lm32_link_hash_table *htab; | |
1127 | bfd *dynobj; | |
84e94c90 | 1128 | |
0e1862bb | 1129 | if (bfd_link_relocatable (info)) |
84e94c90 NC |
1130 | return TRUE; |
1131 | ||
84e94c90 NC |
1132 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1133 | sym_hashes = elf_sym_hashes (abfd); | |
1134 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); | |
1135 | if (!elf_bad_symtab (abfd)) | |
1136 | sym_hashes_end -= symtab_hdr->sh_info; | |
1137 | ||
1138 | htab = lm32_elf_hash_table (info); | |
4dfe6ac6 NC |
1139 | if (htab == NULL) |
1140 | return FALSE; | |
1141 | ||
84e94c90 | 1142 | dynobj = htab->root.dynobj; |
84e94c90 NC |
1143 | |
1144 | rel_end = relocs + sec->reloc_count; | |
1145 | for (rel = relocs; rel < rel_end; rel++) | |
1146 | { | |
1147 | int r_type; | |
1148 | struct elf_link_hash_entry *h; | |
1149 | unsigned long r_symndx; | |
1150 | ||
1151 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1152 | r_type = ELF32_R_TYPE (rel->r_info); | |
1153 | if (r_symndx < symtab_hdr->sh_info) | |
07d6d2b8 | 1154 | h = NULL; |
84e94c90 NC |
1155 | else |
1156 | { | |
1157 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1158 | while (h->root.type == bfd_link_hash_indirect | |
1159 | || h->root.type == bfd_link_hash_warning) | |
1160 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1161 | } | |
1162 | ||
1163 | /* Some relocs require a global offset table. */ | |
ce558b89 | 1164 | if (htab->root.sgot == NULL) |
07d6d2b8 AM |
1165 | { |
1166 | switch (r_type) | |
1167 | { | |
1168 | case R_LM32_16_GOT: | |
1169 | case R_LM32_GOTOFF_HI16: | |
1170 | case R_LM32_GOTOFF_LO16: | |
1171 | if (dynobj == NULL) | |
1172 | htab->root.dynobj = dynobj = abfd; | |
1173 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
1174 | return FALSE; | |
1175 | break; | |
1176 | } | |
1177 | } | |
84e94c90 NC |
1178 | |
1179 | /* Some relocs require a rofixup table. */ | |
1180 | if (IS_FDPIC (abfd)) | |
07d6d2b8 AM |
1181 | { |
1182 | switch (r_type) | |
1183 | { | |
1184 | case R_LM32_32: | |
1185 | /* FDPIC requires a GOT if there is a .rofixup section | |
1186 | (Normal ELF doesn't). */ | |
1187 | if (dynobj == NULL) | |
1188 | htab->root.dynobj = dynobj = abfd; | |
1189 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
1190 | return FALSE; | |
1191 | /* Create .rofixup section */ | |
1192 | if (htab->sfixup32 == NULL) | |
1193 | { | |
1194 | if (! create_rofixup_section (dynobj, info)) | |
1195 | return FALSE; | |
1196 | } | |
1197 | break; | |
1198 | case R_LM32_16_GOT: | |
1199 | case R_LM32_GOTOFF_HI16: | |
1200 | case R_LM32_GOTOFF_LO16: | |
1201 | /* Create .rofixup section. */ | |
1202 | if (htab->sfixup32 == NULL) | |
1203 | { | |
3d4d4302 AM |
1204 | if (dynobj == NULL) |
1205 | htab->root.dynobj = dynobj = abfd; | |
07d6d2b8 AM |
1206 | if (! create_rofixup_section (dynobj, info)) |
1207 | return FALSE; | |
1208 | } | |
1209 | break; | |
1210 | } | |
1211 | } | |
84e94c90 NC |
1212 | |
1213 | switch (r_type) | |
1214 | { | |
1215 | case R_LM32_16_GOT: | |
07d6d2b8 AM |
1216 | if (h != NULL) |
1217 | h->got.refcount += 1; | |
1218 | else | |
1219 | { | |
1220 | bfd_signed_vma *local_got_refcounts; | |
1221 | ||
1222 | /* This is a global offset table entry for a local symbol. */ | |
1223 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1224 | if (local_got_refcounts == NULL) | |
1225 | { | |
1226 | bfd_size_type size; | |
1227 | ||
1228 | size = symtab_hdr->sh_info; | |
1229 | size *= sizeof (bfd_signed_vma); | |
1230 | local_got_refcounts = bfd_zalloc (abfd, size); | |
1231 | if (local_got_refcounts == NULL) | |
1232 | return FALSE; | |
1233 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
1234 | } | |
1235 | local_got_refcounts[r_symndx] += 1; | |
1236 | } | |
1237 | break; | |
1238 | ||
1239 | /* This relocation describes the C++ object vtable hierarchy. | |
1240 | Reconstruct it for later use during GC. */ | |
1241 | case R_LM32_GNU_VTINHERIT: | |
1242 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
1243 | return FALSE; | |
1244 | break; | |
1245 | ||
1246 | /* This relocation describes which C++ vtable entries are actually | |
1247 | used. Record for later use during GC. */ | |
1248 | case R_LM32_GNU_VTENTRY: | |
1249 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
1250 | return FALSE; | |
1251 | break; | |
1252 | ||
1253 | } | |
84e94c90 NC |
1254 | } |
1255 | ||
1256 | return TRUE; | |
1257 | } | |
1258 | ||
1259 | /* Finish up the dynamic sections. */ | |
1260 | ||
1261 | static bfd_boolean | |
1262 | lm32_elf_finish_dynamic_sections (bfd *output_bfd, | |
1263 | struct bfd_link_info *info) | |
1264 | { | |
1265 | struct elf_lm32_link_hash_table *htab; | |
1266 | bfd *dynobj; | |
1267 | asection *sdyn; | |
1268 | asection *sgot; | |
1269 | ||
1270 | htab = lm32_elf_hash_table (info); | |
4dfe6ac6 NC |
1271 | if (htab == NULL) |
1272 | return FALSE; | |
1273 | ||
84e94c90 NC |
1274 | dynobj = htab->root.dynobj; |
1275 | ||
ce558b89 | 1276 | sgot = htab->root.sgotplt; |
3d4d4302 | 1277 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
84e94c90 NC |
1278 | |
1279 | if (htab->root.dynamic_sections_created) | |
1280 | { | |
1281 | asection *splt; | |
1282 | Elf32_External_Dyn *dyncon, *dynconend; | |
1283 | ||
1284 | BFD_ASSERT (sgot != NULL && sdyn != NULL); | |
1285 | ||
1286 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
1287 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); | |
1288 | ||
1289 | for (; dyncon < dynconend; dyncon++) | |
07d6d2b8 AM |
1290 | { |
1291 | Elf_Internal_Dyn dyn; | |
1292 | asection *s; | |
1293 | ||
1294 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
1295 | ||
1296 | switch (dyn.d_tag) | |
1297 | { | |
1298 | default: | |
1299 | break; | |
1300 | ||
1301 | case DT_PLTGOT: | |
1302 | s = htab->root.sgotplt; | |
1303 | goto get_vma; | |
1304 | case DT_JMPREL: | |
1305 | s = htab->root.srelplt; | |
1306 | get_vma: | |
1307 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
1308 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
1309 | break; | |
1310 | ||
1311 | case DT_PLTRELSZ: | |
1312 | s = htab->root.srelplt; | |
84e94c90 | 1313 | dyn.d_un.d_val = s->size; |
07d6d2b8 AM |
1314 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
1315 | break; | |
1316 | } | |
1317 | } | |
84e94c90 NC |
1318 | |
1319 | /* Fill in the first entry in the procedure linkage table. */ | |
ce558b89 | 1320 | splt = htab->root.splt; |
84e94c90 | 1321 | if (splt && splt->size > 0) |
07d6d2b8 AM |
1322 | { |
1323 | if (bfd_link_pic (info)) | |
1324 | { | |
1325 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); | |
1326 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); | |
1327 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); | |
1328 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); | |
1329 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); | |
1330 | } | |
1331 | else | |
1332 | { | |
1333 | unsigned long addr; | |
1334 | /* addr = .got + 4 */ | |
1335 | addr = sgot->output_section->vma + sgot->output_offset + 4; | |
1336 | bfd_put_32 (output_bfd, | |
84e94c90 NC |
1337 | PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), |
1338 | splt->contents); | |
07d6d2b8 | 1339 | bfd_put_32 (output_bfd, |
84e94c90 NC |
1340 | PLT0_ENTRY_WORD1 | (addr & 0xffff), |
1341 | splt->contents + 4); | |
07d6d2b8 AM |
1342 | bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); |
1343 | bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); | |
1344 | bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); | |
1345 | } | |
1346 | ||
1347 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = | |
1348 | PLT_ENTRY_SIZE; | |
1349 | } | |
84e94c90 NC |
1350 | } |
1351 | ||
1352 | /* Fill in the first three entries in the global offset table. */ | |
1353 | if (sgot && sgot->size > 0) | |
1354 | { | |
1355 | if (sdyn == NULL) | |
07d6d2b8 | 1356 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
84e94c90 | 1357 | else |
07d6d2b8 AM |
1358 | bfd_put_32 (output_bfd, |
1359 | sdyn->output_section->vma + sdyn->output_offset, | |
1360 | sgot->contents); | |
84e94c90 NC |
1361 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); |
1362 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
1363 | ||
1364 | /* FIXME: This can be null if create_dynamic_sections wasn't called. */ | |
1365 | if (elf_section_data (sgot->output_section) != NULL) | |
07d6d2b8 | 1366 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
84e94c90 NC |
1367 | } |
1368 | ||
1369 | if (lm32fdpic_fixup32_section (info)) | |
1370 | { | |
1371 | struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; | |
1372 | bfd_vma got_value = hgot->root.u.def.value | |
07d6d2b8 AM |
1373 | + hgot->root.u.def.section->output_section->vma |
1374 | + hgot->root.u.def.section->output_offset; | |
84e94c90 NC |
1375 | struct bfd_link_hash_entry *hend; |
1376 | ||
1377 | /* Last entry is pointer to GOT. */ | |
1378 | _lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value); | |
1379 | ||
1380 | /* Check we wrote enough entries. */ | |
1381 | if (lm32fdpic_fixup32_section (info)->size | |
07d6d2b8 AM |
1382 | != (lm32fdpic_fixup32_section (info)->reloc_count * 4)) |
1383 | { | |
4eca0228 | 1384 | _bfd_error_handler |
2dcf00ce AM |
1385 | ("LINKER BUG: .rofixup section size mismatch: size/4 %" PRId64 |
1386 | " != relocs %d", | |
1387 | (int64_t) (lm32fdpic_fixup32_section (info)->size / 4), | |
07d6d2b8 AM |
1388 | lm32fdpic_fixup32_section (info)->reloc_count); |
1389 | return FALSE; | |
1390 | } | |
84e94c90 NC |
1391 | |
1392 | hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__", | |
07d6d2b8 | 1393 | FALSE, FALSE, TRUE); |
84e94c90 | 1394 | if (hend |
07d6d2b8 | 1395 | && (hend->type == bfd_link_hash_defined |
a0f6fd21 AM |
1396 | || hend->type == bfd_link_hash_defweak) |
1397 | && hend->u.def.section->output_section != NULL) | |
07d6d2b8 AM |
1398 | { |
1399 | bfd_vma value = | |
1400 | lm32fdpic_fixup32_section (info)->output_section->vma | |
1401 | + lm32fdpic_fixup32_section (info)->output_offset | |
1402 | + lm32fdpic_fixup32_section (info)->size | |
1403 | - hend->u.def.section->output_section->vma | |
1404 | - hend->u.def.section->output_offset; | |
1405 | BFD_ASSERT (hend->u.def.value == value); | |
1406 | if (hend->u.def.value != value) | |
1407 | { | |
4eca0228 | 1408 | _bfd_error_handler |
2dcf00ce AM |
1409 | ("LINKER BUG: .rofixup section hend->u.def.value != value: %" |
1410 | PRId64 " != %" PRId64, | |
1411 | (int64_t) hend->u.def.value, (int64_t) value); | |
07d6d2b8 AM |
1412 | return FALSE; |
1413 | } | |
1414 | } | |
84e94c90 NC |
1415 | } |
1416 | ||
1417 | return TRUE; | |
1418 | } | |
1419 | ||
1420 | /* Finish up dynamic symbol handling. We set the contents of various | |
1421 | dynamic sections here. */ | |
1422 | ||
1423 | static bfd_boolean | |
1424 | lm32_elf_finish_dynamic_symbol (bfd *output_bfd, | |
1425 | struct bfd_link_info *info, | |
1426 | struct elf_link_hash_entry *h, | |
1427 | Elf_Internal_Sym *sym) | |
1428 | { | |
1429 | struct elf_lm32_link_hash_table *htab; | |
84e94c90 NC |
1430 | bfd_byte *loc; |
1431 | ||
1432 | htab = lm32_elf_hash_table (info); | |
4dfe6ac6 NC |
1433 | if (htab == NULL) |
1434 | return FALSE; | |
1435 | ||
84e94c90 NC |
1436 | if (h->plt.offset != (bfd_vma) -1) |
1437 | { | |
1438 | asection *splt; | |
1439 | asection *sgot; | |
1440 | asection *srela; | |
1441 | ||
1442 | bfd_vma plt_index; | |
1443 | bfd_vma got_offset; | |
1444 | Elf_Internal_Rela rela; | |
1445 | ||
1446 | /* This symbol has an entry in the procedure linkage table. Set | |
07d6d2b8 | 1447 | it up. */ |
84e94c90 NC |
1448 | BFD_ASSERT (h->dynindx != -1); |
1449 | ||
ce558b89 AM |
1450 | splt = htab->root.splt; |
1451 | sgot = htab->root.sgotplt; | |
1452 | srela = htab->root.srelplt; | |
84e94c90 NC |
1453 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); |
1454 | ||
1455 | /* Get the index in the procedure linkage table which | |
07d6d2b8 AM |
1456 | corresponds to this symbol. This is the index of this symbol |
1457 | in all the symbols for which we are making plt entries. The | |
1458 | first entry in the procedure linkage table is reserved. */ | |
84e94c90 NC |
1459 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; |
1460 | ||
1461 | /* Get the offset into the .got table of the entry that | |
07d6d2b8 AM |
1462 | corresponds to this function. Each .got entry is 4 bytes. |
1463 | The first three are reserved. */ | |
84e94c90 NC |
1464 | got_offset = (plt_index + 3) * 4; |
1465 | ||
1466 | /* Fill in the entry in the procedure linkage table. */ | |
0e1862bb | 1467 | if (! bfd_link_pic (info)) |
07d6d2b8 AM |
1468 | { |
1469 | /* TODO */ | |
1470 | } | |
84e94c90 | 1471 | else |
07d6d2b8 AM |
1472 | { |
1473 | /* TODO */ | |
1474 | } | |
84e94c90 NC |
1475 | |
1476 | /* Fill in the entry in the global offset table. */ | |
1477 | bfd_put_32 (output_bfd, | |
07d6d2b8 AM |
1478 | (splt->output_section->vma |
1479 | + splt->output_offset | |
1480 | + h->plt.offset | |
1481 | + 12), /* same offset */ | |
1482 | sgot->contents + got_offset); | |
84e94c90 NC |
1483 | |
1484 | /* Fill in the entry in the .rela.plt section. */ | |
1485 | rela.r_offset = (sgot->output_section->vma | |
07d6d2b8 AM |
1486 | + sgot->output_offset |
1487 | + got_offset); | |
84e94c90 NC |
1488 | rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT); |
1489 | rela.r_addend = 0; | |
1490 | loc = srela->contents; | |
1491 | loc += plt_index * sizeof (Elf32_External_Rela); | |
1492 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
1493 | ||
1494 | if (!h->def_regular) | |
07d6d2b8 AM |
1495 | { |
1496 | /* Mark the symbol as undefined, rather than as defined in | |
1497 | the .plt section. Leave the value alone. */ | |
1498 | sym->st_shndx = SHN_UNDEF; | |
1499 | } | |
84e94c90 NC |
1500 | |
1501 | } | |
1502 | ||
1503 | if (h->got.offset != (bfd_vma) -1) | |
1504 | { | |
1505 | asection *sgot; | |
1506 | asection *srela; | |
1507 | Elf_Internal_Rela rela; | |
1508 | ||
1509 | /* This symbol has an entry in the global offset table. Set it | |
07d6d2b8 | 1510 | up. */ |
ce558b89 AM |
1511 | sgot = htab->root.sgot; |
1512 | srela = htab->root.srelgot; | |
84e94c90 NC |
1513 | BFD_ASSERT (sgot != NULL && srela != NULL); |
1514 | ||
1515 | rela.r_offset = (sgot->output_section->vma | |
07d6d2b8 AM |
1516 | + sgot->output_offset |
1517 | + (h->got.offset &~ 1)); | |
84e94c90 NC |
1518 | |
1519 | /* If this is a -Bsymbolic link, and the symbol is defined | |
07d6d2b8 AM |
1520 | locally, we just want to emit a RELATIVE reloc. Likewise if |
1521 | the symbol was forced to be local because of a version file. | |
1522 | The entry in the global offset table will already have been | |
1523 | initialized in the relocate_section function. */ | |
0e1862bb | 1524 | if (bfd_link_pic (info) |
07d6d2b8 | 1525 | && (info->symbolic |
84e94c90 NC |
1526 | || h->dynindx == -1 |
1527 | || h->forced_local) | |
07d6d2b8 AM |
1528 | && h->def_regular) |
1529 | { | |
1530 | rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); | |
1531 | rela.r_addend = (h->root.u.def.value | |
1532 | + h->root.u.def.section->output_section->vma | |
1533 | + h->root.u.def.section->output_offset); | |
1534 | } | |
84e94c90 | 1535 | else |
07d6d2b8 | 1536 | { |
84e94c90 | 1537 | BFD_ASSERT ((h->got.offset & 1) == 0); |
07d6d2b8 AM |
1538 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
1539 | rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT); | |
1540 | rela.r_addend = 0; | |
1541 | } | |
84e94c90 NC |
1542 | |
1543 | loc = srela->contents; | |
1544 | loc += srela->reloc_count * sizeof (Elf32_External_Rela); | |
1545 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
1546 | ++srela->reloc_count; | |
1547 | } | |
1548 | ||
1549 | if (h->needs_copy) | |
1550 | { | |
1551 | asection *s; | |
1552 | Elf_Internal_Rela rela; | |
1553 | ||
1554 | /* This symbols needs a copy reloc. Set it up. */ | |
1555 | BFD_ASSERT (h->dynindx != -1 | |
07d6d2b8 AM |
1556 | && (h->root.type == bfd_link_hash_defined |
1557 | || h->root.type == bfd_link_hash_defweak)); | |
84e94c90 | 1558 | |
3d4d4302 | 1559 | s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss"); |
84e94c90 NC |
1560 | BFD_ASSERT (s != NULL); |
1561 | ||
1562 | rela.r_offset = (h->root.u.def.value | |
07d6d2b8 AM |
1563 | + h->root.u.def.section->output_section->vma |
1564 | + h->root.u.def.section->output_offset); | |
84e94c90 NC |
1565 | rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_COPY); |
1566 | rela.r_addend = 0; | |
1567 | loc = s->contents; | |
1568 | loc += s->reloc_count * sizeof (Elf32_External_Rela); | |
1569 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
1570 | ++s->reloc_count; | |
1571 | } | |
1572 | ||
1573 | /* Mark some specially defined symbols as absolute. */ | |
9637f6ef | 1574 | if (h == htab->root.hdynamic || h == htab->root.hgot) |
84e94c90 NC |
1575 | sym->st_shndx = SHN_ABS; |
1576 | ||
1577 | return TRUE; | |
1578 | } | |
1579 | ||
1580 | static enum elf_reloc_type_class | |
7e612e98 AM |
1581 | lm32_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1582 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
1583 | const Elf_Internal_Rela *rela) | |
84e94c90 NC |
1584 | { |
1585 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
1586 | { | |
1587 | case R_LM32_RELATIVE: return reloc_class_relative; | |
1588 | case R_LM32_JMP_SLOT: return reloc_class_plt; | |
1589 | case R_LM32_COPY: return reloc_class_copy; | |
07d6d2b8 | 1590 | default: return reloc_class_normal; |
84e94c90 NC |
1591 | } |
1592 | } | |
1593 | ||
1594 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1595 | regular object. The current definition is in some section of the | |
1596 | dynamic object, but we're not including those sections. We have to | |
1597 | change the definition to something the rest of the link can | |
1598 | understand. */ | |
1599 | ||
1600 | static bfd_boolean | |
1601 | lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info, | |
1602 | struct elf_link_hash_entry *h) | |
1603 | { | |
1604 | struct elf_lm32_link_hash_table *htab; | |
84e94c90 NC |
1605 | bfd *dynobj; |
1606 | asection *s; | |
1607 | ||
1608 | dynobj = elf_hash_table (info)->dynobj; | |
1609 | ||
1610 | /* Make sure we know what is going on here. */ | |
1611 | BFD_ASSERT (dynobj != NULL | |
07d6d2b8 AM |
1612 | && (h->needs_plt |
1613 | || h->is_weakalias | |
1614 | || (h->def_dynamic | |
1615 | && h->ref_regular | |
1616 | && !h->def_regular))); | |
84e94c90 NC |
1617 | |
1618 | /* If this is a function, put it in the procedure linkage table. We | |
1619 | will fill in the contents of the procedure linkage table later, | |
1620 | when we know the address of the .got section. */ | |
1621 | if (h->type == STT_FUNC | |
1622 | || h->needs_plt) | |
1623 | { | |
0e1862bb | 1624 | if (! bfd_link_pic (info) |
07d6d2b8 AM |
1625 | && !h->def_dynamic |
1626 | && !h->ref_dynamic | |
84e94c90 NC |
1627 | && h->root.type != bfd_link_hash_undefweak |
1628 | && h->root.type != bfd_link_hash_undefined) | |
07d6d2b8 AM |
1629 | { |
1630 | /* This case can occur if we saw a PLT reloc in an input | |
1631 | file, but the symbol was never referred to by a dynamic | |
1632 | object. In such a case, we don't actually need to build | |
1633 | a procedure linkage table, and we can just do a PCREL | |
1634 | reloc instead. */ | |
1635 | h->plt.offset = (bfd_vma) -1; | |
1636 | h->needs_plt = 0; | |
1637 | } | |
84e94c90 NC |
1638 | |
1639 | return TRUE; | |
1640 | } | |
1641 | else | |
1642 | h->plt.offset = (bfd_vma) -1; | |
1643 | ||
1644 | /* If this is a weak symbol, and there is a real definition, the | |
1645 | processor independent code will have arranged for us to see the | |
1646 | real definition first, and we can just use the same value. */ | |
60d67dc8 | 1647 | if (h->is_weakalias) |
84e94c90 | 1648 | { |
60d67dc8 AM |
1649 | struct elf_link_hash_entry *def = weakdef (h); |
1650 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
1651 | h->root.u.def.section = def->root.u.def.section; | |
1652 | h->root.u.def.value = def->root.u.def.value; | |
84e94c90 NC |
1653 | return TRUE; |
1654 | } | |
1655 | ||
1656 | /* This is a reference to a symbol defined by a dynamic object which | |
1657 | is not a function. */ | |
1658 | ||
1659 | /* If we are creating a shared library, we must presume that the | |
1660 | only references to the symbol are via the global offset table. | |
1661 | For such cases we need not do anything here; the relocations will | |
1662 | be handled correctly by relocate_section. */ | |
0e1862bb | 1663 | if (bfd_link_pic (info)) |
84e94c90 NC |
1664 | return TRUE; |
1665 | ||
1666 | /* If there are no references to this symbol that do not use the | |
1667 | GOT, we don't need to generate a copy reloc. */ | |
1668 | if (!h->non_got_ref) | |
1669 | return TRUE; | |
1670 | ||
1671 | /* If -z nocopyreloc was given, we won't generate them either. */ | |
3bf083ed | 1672 | if (0 && info->nocopyreloc) |
84e94c90 NC |
1673 | { |
1674 | h->non_got_ref = 0; | |
1675 | return TRUE; | |
1676 | } | |
1677 | ||
3bf083ed AM |
1678 | /* If we don't find any dynamic relocs in read-only sections, then |
1679 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
5dbc8b37 | 1680 | if (0 && !_bfd_elf_readonly_dynrelocs (h)) |
84e94c90 NC |
1681 | { |
1682 | h->non_got_ref = 0; | |
1683 | return TRUE; | |
1684 | } | |
1685 | ||
84e94c90 NC |
1686 | /* We must allocate the symbol in our .dynbss section, which will |
1687 | become part of the .bss section of the executable. There will be | |
1688 | an entry for this symbol in the .dynsym section. The dynamic | |
1689 | object will contain position independent code, so all references | |
1690 | from the dynamic object to this symbol will go through the global | |
1691 | offset table. The dynamic linker will use the .dynsym entry to | |
1692 | determine the address it must put in the global offset table, so | |
1693 | both the dynamic object and the regular object will refer to the | |
1694 | same memory location for the variable. */ | |
1695 | ||
1696 | htab = lm32_elf_hash_table (info); | |
4dfe6ac6 NC |
1697 | if (htab == NULL) |
1698 | return FALSE; | |
1699 | ||
84e94c90 NC |
1700 | s = htab->sdynbss; |
1701 | BFD_ASSERT (s != NULL); | |
1702 | ||
1703 | /* We must generate a R_LM32_COPY reloc to tell the dynamic linker | |
1704 | to copy the initial value out of the dynamic object and into the | |
1705 | runtime process image. We need to remember the offset into the | |
1706 | .rela.bss section we are going to use. */ | |
1d7e9d18 | 1707 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
84e94c90 NC |
1708 | { |
1709 | asection *srel; | |
1710 | ||
1711 | srel = htab->srelbss; | |
1712 | BFD_ASSERT (srel != NULL); | |
1713 | srel->size += sizeof (Elf32_External_Rela); | |
1714 | h->needs_copy = 1; | |
1715 | } | |
1716 | ||
6cabe1ea | 1717 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
84e94c90 NC |
1718 | } |
1719 | ||
1720 | /* Allocate space in .plt, .got and associated reloc sections for | |
1721 | dynamic relocs. */ | |
1722 | ||
1723 | static bfd_boolean | |
1724 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) | |
1725 | { | |
1726 | struct bfd_link_info *info; | |
1727 | struct elf_lm32_link_hash_table *htab; | |
3bf083ed | 1728 | struct elf_dyn_relocs *p; |
84e94c90 NC |
1729 | |
1730 | if (h->root.type == bfd_link_hash_indirect) | |
1731 | return TRUE; | |
1732 | ||
84e94c90 NC |
1733 | info = (struct bfd_link_info *) inf; |
1734 | htab = lm32_elf_hash_table (info); | |
4dfe6ac6 NC |
1735 | if (htab == NULL) |
1736 | return FALSE; | |
84e94c90 | 1737 | |
84e94c90 NC |
1738 | if (htab->root.dynamic_sections_created |
1739 | && h->plt.refcount > 0) | |
1740 | { | |
1741 | /* Make sure this symbol is output as a dynamic symbol. | |
07d6d2b8 | 1742 | Undefined weak syms won't yet be marked as dynamic. */ |
84e94c90 | 1743 | if (h->dynindx == -1 |
07d6d2b8 AM |
1744 | && !h->forced_local) |
1745 | { | |
1746 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
1747 | return FALSE; | |
1748 | } | |
84e94c90 | 1749 | |
0e1862bb | 1750 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) |
07d6d2b8 AM |
1751 | { |
1752 | asection *s = htab->root.splt; | |
1753 | ||
1754 | /* If this is the first .plt entry, make room for the special | |
1755 | first entry. */ | |
1756 | if (s->size == 0) | |
1757 | s->size += PLT_ENTRY_SIZE; | |
1758 | ||
1759 | h->plt.offset = s->size; | |
1760 | ||
1761 | /* If this symbol is not defined in a regular file, and we are | |
1762 | not generating a shared library, then set the symbol to this | |
1763 | location in the .plt. This is required to make function | |
1764 | pointers compare as equal between the normal executable and | |
1765 | the shared library. */ | |
1766 | if (! bfd_link_pic (info) | |
1767 | && !h->def_regular) | |
1768 | { | |
1769 | h->root.u.def.section = s; | |
1770 | h->root.u.def.value = h->plt.offset; | |
1771 | } | |
1772 | ||
1773 | /* Make room for this entry. */ | |
1774 | s->size += PLT_ENTRY_SIZE; | |
1775 | ||
1776 | /* We also need to make an entry in the .got.plt section, which | |
1777 | will be placed in the .got section by the linker script. */ | |
1778 | htab->root.sgotplt->size += 4; | |
1779 | ||
1780 | /* We also need to make an entry in the .rel.plt section. */ | |
1781 | htab->root.srelplt->size += sizeof (Elf32_External_Rela); | |
1782 | } | |
84e94c90 | 1783 | else |
07d6d2b8 AM |
1784 | { |
1785 | h->plt.offset = (bfd_vma) -1; | |
1786 | h->needs_plt = 0; | |
1787 | } | |
84e94c90 NC |
1788 | } |
1789 | else | |
1790 | { | |
1791 | h->plt.offset = (bfd_vma) -1; | |
1792 | h->needs_plt = 0; | |
1793 | } | |
1794 | ||
1795 | if (h->got.refcount > 0) | |
1796 | { | |
1797 | asection *s; | |
1798 | bfd_boolean dyn; | |
1799 | ||
1800 | /* Make sure this symbol is output as a dynamic symbol. | |
07d6d2b8 | 1801 | Undefined weak syms won't yet be marked as dynamic. */ |
84e94c90 | 1802 | if (h->dynindx == -1 |
07d6d2b8 AM |
1803 | && !h->forced_local) |
1804 | { | |
1805 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
1806 | return FALSE; | |
1807 | } | |
84e94c90 | 1808 | |
ce558b89 | 1809 | s = htab->root.sgot; |
84e94c90 NC |
1810 | |
1811 | h->got.offset = s->size; | |
1812 | s->size += 4; | |
1813 | dyn = htab->root.dynamic_sections_created; | |
0e1862bb | 1814 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)) |
07d6d2b8 | 1815 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
84e94c90 NC |
1816 | } |
1817 | else | |
1818 | h->got.offset = (bfd_vma) -1; | |
1819 | ||
190eb1dd | 1820 | if (h->dyn_relocs == NULL) |
84e94c90 NC |
1821 | return TRUE; |
1822 | ||
1823 | /* In the shared -Bsymbolic case, discard space allocated for | |
1824 | dynamic pc-relative relocs against symbols which turn out to be | |
1825 | defined in regular objects. For the normal shared case, discard | |
1826 | space for pc-relative relocs that have become local due to symbol | |
1827 | visibility changes. */ | |
1828 | ||
0e1862bb | 1829 | if (bfd_link_pic (info)) |
84e94c90 NC |
1830 | { |
1831 | if (h->def_regular | |
07d6d2b8 AM |
1832 | && (h->forced_local |
1833 | || info->symbolic)) | |
1834 | { | |
1835 | struct elf_dyn_relocs **pp; | |
1836 | ||
190eb1dd | 1837 | for (pp = &h->dyn_relocs; (p = *pp) != NULL;) |
07d6d2b8 AM |
1838 | { |
1839 | p->count -= p->pc_count; | |
1840 | p->pc_count = 0; | |
1841 | if (p->count == 0) | |
1842 | *pp = p->next; | |
1843 | else | |
1844 | pp = &p->next; | |
1845 | } | |
1846 | } | |
84e94c90 NC |
1847 | |
1848 | /* Also discard relocs on undefined weak syms with non-default | |
1849 | visibility. */ | |
190eb1dd | 1850 | if (h->dyn_relocs != NULL |
84e94c90 NC |
1851 | && h->root.type == bfd_link_hash_undefweak) |
1852 | { | |
1853 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
190eb1dd | 1854 | h->dyn_relocs = NULL; |
84e94c90 NC |
1855 | |
1856 | /* Make sure undefined weak symbols are output as a dynamic | |
1857 | symbol in PIEs. */ | |
1858 | else if (h->dynindx == -1 | |
1859 | && !h->forced_local) | |
1860 | { | |
1861 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
1862 | return FALSE; | |
1863 | } | |
1864 | } | |
1865 | } | |
1866 | else | |
1867 | { | |
1868 | /* For the non-shared case, discard space for relocs against | |
07d6d2b8 AM |
1869 | symbols which turn out to need copy relocs or are not |
1870 | dynamic. */ | |
84e94c90 NC |
1871 | |
1872 | if (!h->non_got_ref | |
07d6d2b8 AM |
1873 | && ((h->def_dynamic |
1874 | && !h->def_regular) | |
1875 | || (htab->root.dynamic_sections_created | |
1876 | && (h->root.type == bfd_link_hash_undefweak | |
1877 | || h->root.type == bfd_link_hash_undefined)))) | |
1878 | { | |
1879 | /* Make sure this symbol is output as a dynamic symbol. | |
1880 | Undefined weak syms won't yet be marked as dynamic. */ | |
1881 | if (h->dynindx == -1 | |
1882 | && !h->forced_local) | |
1883 | { | |
1884 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
1885 | return FALSE; | |
1886 | } | |
1887 | ||
1888 | /* If that succeeded, we know we'll be keeping all the | |
1889 | relocs. */ | |
1890 | if (h->dynindx != -1) | |
1891 | goto keep; | |
1892 | } | |
84e94c90 | 1893 | |
190eb1dd | 1894 | h->dyn_relocs = NULL; |
84e94c90 NC |
1895 | |
1896 | keep: ; | |
1897 | } | |
1898 | ||
1899 | /* Finally, allocate space. */ | |
190eb1dd | 1900 | for (p = h->dyn_relocs; p != NULL; p = p->next) |
84e94c90 NC |
1901 | { |
1902 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
1903 | sreloc->size += p->count * sizeof (Elf32_External_Rela); | |
1904 | } | |
1905 | ||
1906 | return TRUE; | |
1907 | } | |
1908 | ||
84e94c90 NC |
1909 | /* Set the sizes of the dynamic sections. */ |
1910 | ||
1911 | static bfd_boolean | |
1912 | lm32_elf_size_dynamic_sections (bfd *output_bfd, | |
07d6d2b8 | 1913 | struct bfd_link_info *info) |
84e94c90 NC |
1914 | { |
1915 | struct elf_lm32_link_hash_table *htab; | |
1916 | bfd *dynobj; | |
1917 | asection *s; | |
1918 | bfd_boolean relocs; | |
1919 | bfd *ibfd; | |
1920 | ||
1921 | htab = lm32_elf_hash_table (info); | |
4dfe6ac6 NC |
1922 | if (htab == NULL) |
1923 | return FALSE; | |
1924 | ||
84e94c90 NC |
1925 | dynobj = htab->root.dynobj; |
1926 | BFD_ASSERT (dynobj != NULL); | |
1927 | ||
1928 | if (htab->root.dynamic_sections_created) | |
1929 | { | |
1930 | /* Set the contents of the .interp section to the interpreter. */ | |
9b8b325a | 1931 | if (bfd_link_executable (info) && !info->nointerp) |
84e94c90 | 1932 | { |
3d4d4302 | 1933 | s = bfd_get_linker_section (dynobj, ".interp"); |
84e94c90 NC |
1934 | BFD_ASSERT (s != NULL); |
1935 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
1936 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1937 | } | |
1938 | } | |
1939 | ||
1940 | /* Set up .got offsets for local syms, and space for local dynamic | |
1941 | relocs. */ | |
c72f2fb2 | 1942 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
84e94c90 NC |
1943 | { |
1944 | bfd_signed_vma *local_got; | |
1945 | bfd_signed_vma *end_local_got; | |
1946 | bfd_size_type locsymcount; | |
1947 | Elf_Internal_Shdr *symtab_hdr; | |
1948 | asection *srel; | |
1949 | ||
1950 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
07d6d2b8 | 1951 | continue; |
84e94c90 NC |
1952 | |
1953 | for (s = ibfd->sections; s != NULL; s = s->next) | |
07d6d2b8 AM |
1954 | { |
1955 | struct elf_dyn_relocs *p; | |
1956 | ||
1957 | for (p = ((struct elf_dyn_relocs *) | |
1958 | elf_section_data (s)->local_dynrel); | |
1959 | p != NULL; | |
1960 | p = p->next) | |
1961 | { | |
1962 | if (! bfd_is_abs_section (p->sec) | |
1963 | && bfd_is_abs_section (p->sec->output_section)) | |
1964 | { | |
1965 | /* Input section has been discarded, either because | |
1966 | it is a copy of a linkonce section or due to | |
1967 | linker script /DISCARD/, so we'll be discarding | |
1968 | the relocs too. */ | |
1969 | } | |
1970 | else if (p->count != 0) | |
1971 | { | |
1972 | srel = elf_section_data (p->sec)->sreloc; | |
1973 | srel->size += p->count * sizeof (Elf32_External_Rela); | |
1974 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) | |
1975 | info->flags |= DF_TEXTREL; | |
1976 | } | |
1977 | } | |
1978 | } | |
84e94c90 NC |
1979 | |
1980 | local_got = elf_local_got_refcounts (ibfd); | |
1981 | if (!local_got) | |
07d6d2b8 | 1982 | continue; |
84e94c90 NC |
1983 | |
1984 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
1985 | locsymcount = symtab_hdr->sh_info; | |
1986 | end_local_got = local_got + locsymcount; | |
ce558b89 AM |
1987 | s = htab->root.sgot; |
1988 | srel = htab->root.srelgot; | |
84e94c90 | 1989 | for (; local_got < end_local_got; ++local_got) |
07d6d2b8 AM |
1990 | { |
1991 | if (*local_got > 0) | |
1992 | { | |
1993 | *local_got = s->size; | |
1994 | s->size += 4; | |
1995 | if (bfd_link_pic (info)) | |
1996 | srel->size += sizeof (Elf32_External_Rela); | |
1997 | } | |
1998 | else | |
1999 | *local_got = (bfd_vma) -1; | |
2000 | } | |
84e94c90 NC |
2001 | } |
2002 | ||
2003 | /* Allocate global sym .plt and .got entries, and space for global | |
2004 | sym dynamic relocs. */ | |
2005 | elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info); | |
2006 | ||
2007 | /* We now have determined the sizes of the various dynamic sections. | |
2008 | Allocate memory for them. */ | |
2009 | relocs = FALSE; | |
2010 | for (s = dynobj->sections; s != NULL; s = s->next) | |
2011 | { | |
2012 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
07d6d2b8 | 2013 | continue; |
84e94c90 | 2014 | |
ce558b89 | 2015 | if (s == htab->root.splt |
07d6d2b8 AM |
2016 | || s == htab->root.sgot |
2017 | || s == htab->root.sgotplt | |
84e94c90 | 2018 | || s == htab->sdynbss) |
07d6d2b8 AM |
2019 | { |
2020 | /* Strip this section if we don't need it; see the | |
2021 | comment below. */ | |
2022 | } | |
fd361982 | 2023 | else if (CONST_STRNEQ (bfd_section_name (s), ".rela")) |
07d6d2b8 AM |
2024 | { |
2025 | if (s->size != 0 && s != htab->root.srelplt) | |
2026 | relocs = TRUE; | |
2027 | ||
2028 | /* We use the reloc_count field as a counter if we need | |
2029 | to copy relocs into the output file. */ | |
2030 | s->reloc_count = 0; | |
2031 | } | |
84e94c90 NC |
2032 | else |
2033 | /* It's not one of our sections, so don't allocate space. */ | |
2034 | continue; | |
2035 | ||
2036 | if (s->size == 0) | |
07d6d2b8 AM |
2037 | { |
2038 | /* If we don't need this section, strip it from the | |
2039 | output file. This is mostly to handle .rela.bss and | |
2040 | .rela.plt. We must create both sections in | |
2041 | create_dynamic_sections, because they must be created | |
2042 | before the linker maps input sections to output | |
2043 | sections. The linker does that before | |
2044 | adjust_dynamic_symbol is called, and it is that | |
2045 | function which decides whether anything needs to go | |
2046 | into these sections. */ | |
2047 | s->flags |= SEC_EXCLUDE; | |
2048 | continue; | |
2049 | } | |
84e94c90 NC |
2050 | |
2051 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
2052 | continue; | |
2053 | ||
2054 | /* Allocate memory for the section contents. We use bfd_zalloc | |
07d6d2b8 AM |
2055 | here in case unused entries are not reclaimed before the |
2056 | section's contents are written out. This should not happen, | |
2057 | but this way if it does, we get a R_LM32_NONE reloc instead | |
2058 | of garbage. */ | |
84e94c90 NC |
2059 | s->contents = bfd_zalloc (dynobj, s->size); |
2060 | if (s->contents == NULL) | |
07d6d2b8 | 2061 | return FALSE; |
84e94c90 NC |
2062 | } |
2063 | ||
3084d7a2 L |
2064 | if (!_bfd_elf_add_dynamic_tags (output_bfd, info, relocs)) |
2065 | return FALSE; | |
84e94c90 NC |
2066 | |
2067 | /* Allocate .rofixup section. */ | |
2068 | if (IS_FDPIC (output_bfd)) | |
2069 | { | |
2070 | struct weak_symbol_list *list_start = NULL, *list_end = NULL; | |
2071 | int rgot_weak_count = 0; | |
2072 | int r32_count = 0; | |
2073 | int rgot_count = 0; | |
2074 | /* Look for deleted sections. */ | |
c72f2fb2 | 2075 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
07d6d2b8 AM |
2076 | { |
2077 | for (s = ibfd->sections; s != NULL; s = s->next) | |
2078 | { | |
2079 | if (s->reloc_count) | |
2080 | { | |
2081 | /* Count relocs that need .rofixup entires. */ | |
2082 | Elf_Internal_Rela *internal_relocs, *end; | |
2083 | internal_relocs = elf_section_data (s)->relocs; | |
2084 | if (internal_relocs == NULL) | |
2085 | internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, FALSE)); | |
2086 | if (internal_relocs != NULL) | |
2087 | { | |
2088 | end = internal_relocs + s->reloc_count; | |
2089 | while (internal_relocs < end) | |
2090 | { | |
2091 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2092 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); | |
2093 | unsigned long r_symndx; | |
2094 | struct elf_link_hash_entry *h; | |
2095 | ||
2096 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2097 | sym_hashes = elf_sym_hashes (ibfd); | |
2098 | r_symndx = ELF32_R_SYM (internal_relocs->r_info); | |
2099 | h = NULL; | |
2100 | if (r_symndx < symtab_hdr->sh_info) | |
2101 | { | |
2102 | } | |
2103 | else | |
2104 | { | |
2105 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2106 | while (h->root.type == bfd_link_hash_indirect | |
2107 | || h->root.type == bfd_link_hash_warning) | |
2108 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2109 | } | |
2110 | ||
2111 | /* Don't generate entries for weak symbols. */ | |
2112 | if (!h || (h && h->root.type != bfd_link_hash_undefweak)) | |
2113 | { | |
fd361982 | 2114 | if (!discarded_section (s) && !((bfd_section_flags (s) & SEC_ALLOC) == 0)) |
07d6d2b8 AM |
2115 | { |
2116 | switch (ELF32_R_TYPE (internal_relocs->r_info)) | |
2117 | { | |
2118 | case R_LM32_32: | |
2119 | r32_count++; | |
2120 | break; | |
2121 | case R_LM32_16_GOT: | |
2122 | rgot_count++; | |
2123 | break; | |
2124 | } | |
2125 | } | |
2126 | } | |
2127 | else | |
2128 | { | |
2129 | struct weak_symbol_list *current, *new_entry; | |
2130 | /* Is this symbol already in the list? */ | |
2131 | for (current = list_start; current; current = current->next) | |
2132 | { | |
2133 | if (!strcmp (current->name, h->root.root.string)) | |
2134 | break; | |
2135 | } | |
fd361982 | 2136 | if (!current && !discarded_section (s) && (bfd_section_flags (s) & SEC_ALLOC)) |
07d6d2b8 AM |
2137 | { |
2138 | /* Will this have an entry in the GOT. */ | |
2139 | if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT) | |
2140 | { | |
2141 | /* Create a new entry. */ | |
2142 | new_entry = malloc (sizeof (struct weak_symbol_list)); | |
2143 | if (!new_entry) | |
2144 | return FALSE; | |
2145 | new_entry->name = h->root.root.string; | |
2146 | new_entry->next = NULL; | |
2147 | /* Add to list */ | |
2148 | if (list_start == NULL) | |
2149 | { | |
2150 | list_start = new_entry; | |
2151 | list_end = new_entry; | |
2152 | } | |
2153 | else | |
2154 | { | |
2155 | list_end->next = new_entry; | |
2156 | list_end = new_entry; | |
2157 | } | |
2158 | /* Increase count of undefined weak symbols in the got. */ | |
2159 | rgot_weak_count++; | |
2160 | } | |
2161 | } | |
2162 | } | |
2163 | internal_relocs++; | |
2164 | } | |
2165 | } | |
2166 | else | |
2167 | return FALSE; | |
2168 | } | |
2169 | } | |
2170 | } | |
84e94c90 NC |
2171 | /* Free list. */ |
2172 | while (list_start) | |
07d6d2b8 AM |
2173 | { |
2174 | list_end = list_start->next; | |
2175 | free (list_start); | |
2176 | list_start = list_end; | |
2177 | } | |
84e94c90 NC |
2178 | |
2179 | /* Size sections. */ | |
ce558b89 AM |
2180 | lm32fdpic_fixup32_section (info)->size |
2181 | = (r32_count + (htab->root.sgot->size / 4) - rgot_weak_count + 1) * 4; | |
84e94c90 | 2182 | if (lm32fdpic_fixup32_section (info)->size == 0) |
07d6d2b8 | 2183 | lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE; |
84e94c90 | 2184 | else |
07d6d2b8 AM |
2185 | { |
2186 | lm32fdpic_fixup32_section (info)->contents = | |
2187 | bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size); | |
2188 | if (lm32fdpic_fixup32_section (info)->contents == NULL) | |
2189 | return FALSE; | |
2190 | } | |
84e94c90 NC |
2191 | } |
2192 | ||
2193 | return TRUE; | |
2194 | } | |
2195 | ||
2196 | /* Create dynamic sections when linking against a dynamic object. */ | |
2197 | ||
2198 | static bfd_boolean | |
2199 | lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) | |
2200 | { | |
2201 | struct elf_lm32_link_hash_table *htab; | |
2202 | flagword flags, pltflags; | |
2203 | asection *s; | |
2204 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2205 | int ptralign = 2; /* 32bit */ | |
2206 | ||
2207 | htab = lm32_elf_hash_table (info); | |
4dfe6ac6 NC |
2208 | if (htab == NULL) |
2209 | return FALSE; | |
84e94c90 NC |
2210 | |
2211 | /* Make sure we have a GOT - For the case where we have a dynamic object | |
2212 | but none of the relocs in check_relocs */ | |
ce558b89 | 2213 | if (!_bfd_elf_create_got_section (abfd, info)) |
84e94c90 NC |
2214 | return FALSE; |
2215 | if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL)) | |
2216 | { | |
2217 | if (! create_rofixup_section (abfd, info)) | |
07d6d2b8 | 2218 | return FALSE; |
84e94c90 NC |
2219 | } |
2220 | ||
2221 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and | |
2222 | .rel[a].bss sections. */ | |
2223 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
07d6d2b8 | 2224 | | SEC_LINKER_CREATED); |
84e94c90 NC |
2225 | |
2226 | pltflags = flags; | |
2227 | pltflags |= SEC_CODE; | |
2228 | if (bed->plt_not_loaded) | |
2229 | pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); | |
2230 | if (bed->plt_readonly) | |
2231 | pltflags |= SEC_READONLY; | |
2232 | ||
3d4d4302 | 2233 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); |
ce558b89 | 2234 | htab->root.splt = s; |
84e94c90 | 2235 | if (s == NULL |
fd361982 | 2236 | || !bfd_set_section_alignment (s, bed->plt_alignment)) |
84e94c90 NC |
2237 | return FALSE; |
2238 | ||
2239 | if (bed->want_plt_sym) | |
2240 | { | |
2241 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the | |
07d6d2b8 | 2242 | .plt section. */ |
84e94c90 NC |
2243 | struct bfd_link_hash_entry *bh = NULL; |
2244 | struct elf_link_hash_entry *h; | |
2245 | ||
2246 | if (! (_bfd_generic_link_add_one_symbol | |
07d6d2b8 AM |
2247 | (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, |
2248 | (bfd_vma) 0, NULL, FALSE, | |
2249 | get_elf_backend_data (abfd)->collect, &bh))) | |
2250 | return FALSE; | |
84e94c90 NC |
2251 | h = (struct elf_link_hash_entry *) bh; |
2252 | h->def_regular = 1; | |
2253 | h->type = STT_OBJECT; | |
2254 | htab->root.hplt = h; | |
2255 | ||
0e1862bb | 2256 | if (bfd_link_pic (info) |
07d6d2b8 AM |
2257 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
2258 | return FALSE; | |
84e94c90 NC |
2259 | } |
2260 | ||
3d4d4302 AM |
2261 | s = bfd_make_section_anyway_with_flags (abfd, |
2262 | bed->default_use_rela_p | |
2263 | ? ".rela.plt" : ".rel.plt", | |
2264 | flags | SEC_READONLY); | |
ce558b89 | 2265 | htab->root.srelplt = s; |
84e94c90 | 2266 | if (s == NULL |
fd361982 | 2267 | || !bfd_set_section_alignment (s, ptralign)) |
84e94c90 NC |
2268 | return FALSE; |
2269 | ||
ce558b89 AM |
2270 | if (htab->root.sgot == NULL |
2271 | && !_bfd_elf_create_got_section (abfd, info)) | |
84e94c90 NC |
2272 | return FALSE; |
2273 | ||
84e94c90 NC |
2274 | if (bed->want_dynbss) |
2275 | { | |
2276 | /* The .dynbss section is a place to put symbols which are defined | |
07d6d2b8 AM |
2277 | by dynamic objects, are referenced by regular objects, and are |
2278 | not functions. We must allocate space for them in the process | |
2279 | image and use a R_*_COPY reloc to tell the dynamic linker to | |
2280 | initialize them at run time. The linker script puts the .dynbss | |
2281 | section into the .bss section of the final image. */ | |
3d4d4302 AM |
2282 | s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", |
2283 | SEC_ALLOC | SEC_LINKER_CREATED); | |
84e94c90 NC |
2284 | htab->sdynbss = s; |
2285 | if (s == NULL) | |
07d6d2b8 | 2286 | return FALSE; |
84e94c90 | 2287 | /* The .rel[a].bss section holds copy relocs. This section is not |
07d6d2b8 AM |
2288 | normally needed. We need to create it here, though, so that the |
2289 | linker will map it to an output section. We can't just create it | |
2290 | only if we need it, because we will not know whether we need it | |
2291 | until we have seen all the input files, and the first time the | |
2292 | main linker code calls BFD after examining all the input files | |
2293 | (size_dynamic_sections) the input sections have already been | |
2294 | mapped to the output sections. If the section turns out not to | |
2295 | be needed, we can discard it later. We will never need this | |
2296 | section when generating a shared object, since they do not use | |
2297 | copy relocs. */ | |
0e1862bb | 2298 | if (! bfd_link_pic (info)) |
07d6d2b8 AM |
2299 | { |
2300 | s = bfd_make_section_anyway_with_flags (abfd, | |
3d4d4302 AM |
2301 | (bed->default_use_rela_p |
2302 | ? ".rela.bss" : ".rel.bss"), | |
2303 | flags | SEC_READONLY); | |
07d6d2b8 AM |
2304 | htab->srelbss = s; |
2305 | if (s == NULL | |
fd361982 | 2306 | || !bfd_set_section_alignment (s, ptralign)) |
07d6d2b8 AM |
2307 | return FALSE; |
2308 | } | |
84e94c90 NC |
2309 | } |
2310 | ||
2311 | return TRUE; | |
2312 | } | |
2313 | ||
84e94c90 | 2314 | static bfd_boolean |
04c3a755 | 2315 | lm32_elf_always_size_sections (bfd *output_bfd, struct bfd_link_info *info) |
84e94c90 | 2316 | { |
0e1862bb | 2317 | if (!bfd_link_relocatable (info)) |
84e94c90 | 2318 | { |
04c3a755 NS |
2319 | if (!bfd_elf_stack_segment_size (output_bfd, info, |
2320 | "__stacksize", DEFAULT_STACK_SIZE)) | |
2321 | return FALSE; | |
84e94c90 | 2322 | |
84e94c90 | 2323 | asection *sec = bfd_get_section_by_name (output_bfd, ".stack"); |
84e94c90 | 2324 | if (sec) |
04c3a755 | 2325 | sec->size = info->stacksize >= 0 ? info->stacksize : 0; |
84e94c90 NC |
2326 | } |
2327 | ||
2328 | return TRUE; | |
2329 | } | |
2330 | ||
84e94c90 NC |
2331 | static bfd_boolean |
2332 | lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd) | |
2333 | { | |
2334 | unsigned i; | |
2335 | ||
2336 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
2337 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2338 | return TRUE; | |
2339 | ||
e2349352 | 2340 | if (! _bfd_elf_copy_private_bfd_data (ibfd, obfd)) |
84e94c90 NC |
2341 | return FALSE; |
2342 | ||
2343 | if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr | |
2344 | || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr) | |
2345 | return TRUE; | |
2346 | ||
2347 | /* Copy the stack size. */ | |
2348 | for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++) | |
2349 | if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK) | |
2350 | { | |
2351 | Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i]; | |
2352 | ||
2353 | for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++) | |
2354 | if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK) | |
2355 | { | |
2356 | memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr)); | |
2357 | ||
2358 | /* Rewrite the phdrs, since we're only called after they were first written. */ | |
2359 | if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd) | |
2360 | ->s->sizeof_ehdr, SEEK_SET) != 0 | |
2361 | || get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr, | |
2362 | elf_elfheader (obfd)->e_phnum) != 0) | |
2363 | return FALSE; | |
2364 | break; | |
2365 | } | |
2366 | ||
2367 | break; | |
2368 | } | |
2369 | ||
2370 | return TRUE; | |
2371 | } | |
2372 | ||
2373 | ||
07d6d2b8 | 2374 | #define ELF_ARCH bfd_arch_lm32 |
ae95ffa6 | 2375 | #define ELF_TARGET_ID LM32_ELF_DATA |
07d6d2b8 AM |
2376 | #define ELF_MACHINE_CODE EM_LATTICEMICO32 |
2377 | #define ELF_MAXPAGESIZE 0x1000 | |
2378 | ||
2379 | #define TARGET_BIG_SYM lm32_elf32_vec | |
2380 | #define TARGET_BIG_NAME "elf32-lm32" | |
2381 | ||
2382 | #define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup | |
2383 | #define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup | |
2384 | #define elf_info_to_howto lm32_info_to_howto_rela | |
f3185997 | 2385 | #define elf_info_to_howto_rel NULL |
07d6d2b8 AM |
2386 | #define elf_backend_rela_normal 1 |
2387 | #define elf_backend_object_p lm32_elf_object_p | |
2388 | #define elf_backend_final_write_processing lm32_elf_final_write_processing | |
04c3a755 | 2389 | #define elf_backend_stack_align 8 |
07d6d2b8 AM |
2390 | #define elf_backend_can_gc_sections 1 |
2391 | #define elf_backend_can_refcount 1 | |
2392 | #define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook | |
2393 | #define elf_backend_plt_readonly 1 | |
2394 | #define elf_backend_want_got_plt 1 | |
2395 | #define elf_backend_want_plt_sym 0 | |
2396 | #define elf_backend_got_header_size 12 | |
64f52338 | 2397 | #define elf_backend_dtrel_excludes_plt 1 |
07d6d2b8 AM |
2398 | #define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create |
2399 | #define elf_backend_check_relocs lm32_elf_check_relocs | |
2400 | #define elf_backend_reloc_type_class lm32_elf_reloc_type_class | |
07d6d2b8 | 2401 | #define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections |
d00dd7dc | 2402 | #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all |
07d6d2b8 AM |
2403 | #define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections |
2404 | #define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections | |
2405 | #define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol | |
2406 | #define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol | |
2407 | #define elf_backend_relocate_section lm32_elf_relocate_section | |
84e94c90 NC |
2408 | |
2409 | #include "elf32-target.h" | |
2410 | ||
2411 | #undef ELF_MAXPAGESIZE | |
2412 | #define ELF_MAXPAGESIZE 0x4000 | |
2413 | ||
2414 | ||
2415 | #undef TARGET_BIG_SYM | |
07d6d2b8 AM |
2416 | #define TARGET_BIG_SYM lm32_elf32_fdpic_vec |
2417 | #undef TARGET_BIG_NAME | |
84e94c90 NC |
2418 | #define TARGET_BIG_NAME "elf32-lm32fdpic" |
2419 | #undef elf32_bed | |
2420 | #define elf32_bed elf32_lm32fdpic_bed | |
2421 | ||
07d6d2b8 AM |
2422 | #undef elf_backend_always_size_sections |
2423 | #define elf_backend_always_size_sections lm32_elf_always_size_sections | |
2424 | #undef bfd_elf32_bfd_copy_private_bfd_data | |
2425 | #define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data | |
84e94c90 NC |
2426 | |
2427 | #include "elf32-target.h" |