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