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a3c62988 | 1 | /* Meta support for 32-bit ELF |
b3adc24a | 2 | Copyright (C) 2013-2020 Free Software Foundation, Inc. |
a3c62988 NC |
3 | Contributed by Imagination Technologies Ltd. |
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 | ||
22 | #include "sysdep.h" | |
23 | #include "bfd.h" | |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
26 | #include "elf32-metag.h" | |
27 | #include "elf/metag.h" | |
28 | ||
29 | #define GOT_ENTRY_SIZE 4 | |
30 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0" | |
31 | ||
32 | /* ABI version: | |
33 | 0 - original | |
34 | 1 - with GOT offset */ | |
35 | #define METAG_ELF_ABI_VERSION 1 | |
36 | ||
37 | static const unsigned int plt0_entry[] = | |
38 | { | |
39 | 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */ | |
40 | 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */ | |
41 | 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */ | |
42 | 0xc600012a, /* GETD PC, [D0Re0+#4] */ | |
43 | 0xa0fffffe /* NOP */ | |
44 | }; | |
45 | ||
46 | static const unsigned int plt0_pic_entry[] = | |
47 | { | |
48 | 0x82900001, /* ADDT A0.2, CPC0, #0 */ | |
49 | 0x82100000, /* ADD A0.2, A0.2, #0 */ | |
50 | 0xa3100c20, /* MOV D0Re0, A0.2 */ | |
51 | 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */ | |
52 | 0xc600012a, /* GETD PC, [D0Re0+#4] */ | |
53 | }; | |
54 | ||
55 | static const unsigned int plt_entry[] = | |
56 | { | |
57 | 0x82100005, /* MOVT A0.2, #HI(GOT+off) */ | |
58 | 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */ | |
59 | 0xc600806a, /* GETD PC, [A0.2] */ | |
60 | 0x03000004, /* MOV D1Re0, #LO(offset) */ | |
61 | 0xa0000000 /* B PLT0 */ | |
62 | }; | |
63 | ||
64 | static const unsigned int plt_pic_entry[] = | |
65 | { | |
66 | 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */ | |
67 | 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */ | |
68 | 0xc600806a, /* GETD PC, [A0.2] */ | |
69 | 0x03000004, /* MOV D1Re0, #LO(offset) */ | |
70 | 0xa0000000 /* B PLT0 */ | |
71 | }; | |
72 | ||
73 | /* Variable names follow a coding style. | |
74 | Please follow this (Apps Hungarian) style: | |
75 | ||
07d6d2b8 AM |
76 | Structure/Variable Prefix |
77 | elf_link_hash_table "etab" | |
78 | elf_link_hash_entry "eh" | |
a3c62988 | 79 | |
07d6d2b8 AM |
80 | elf_metag_link_hash_table "htab" |
81 | elf_metag_link_hash_entry "hh" | |
a3c62988 | 82 | |
07d6d2b8 AM |
83 | bfd_link_hash_table "btab" |
84 | bfd_link_hash_entry "bh" | |
a3c62988 NC |
85 | |
86 | bfd_hash_table containing stubs "bstab" | |
07d6d2b8 | 87 | elf_metag_stub_hash_entry "hsh" |
a3c62988 | 88 | |
a3c62988 NC |
89 | Always remember to use GNU Coding Style. */ |
90 | ||
91 | #define PLT_ENTRY_SIZE sizeof(plt_entry) | |
92 | ||
93 | static reloc_howto_type elf_metag_howto_table[] = | |
94 | { | |
95 | /* High order 16 bit absolute. */ | |
96 | HOWTO (R_METAG_HIADDR16, /* type */ | |
97 | 16, /* rightshift */ | |
98 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
99 | 16, /* bitsize */ | |
100 | FALSE, /* pc_relative */ | |
101 | 3, /* bitpos */ | |
102 | complain_overflow_dont, /* complain_on_overflow */ | |
103 | bfd_elf_generic_reloc, /* special_function */ | |
104 | "R_METAG_HIADDR16", /* name */ | |
105 | FALSE, /* partial_inplace */ | |
106 | 0, /* src_mask */ | |
107 | 0x0007fff8, /* dst_mask */ | |
108 | FALSE), /* pcrel_offset */ | |
109 | ||
110 | /* Low order 16 bit absolute. */ | |
111 | HOWTO (R_METAG_LOADDR16, /* type */ | |
112 | 0, /* rightshift */ | |
113 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
114 | 16, /* bitsize */ | |
115 | FALSE, /* pc_relative */ | |
116 | 3, /* bitpos */ | |
117 | complain_overflow_dont,/* complain_on_overflow */ | |
118 | bfd_elf_generic_reloc, /* special_function */ | |
119 | "R_METAG_LOADDR16", /* name */ | |
120 | FALSE, /* partial_inplace */ | |
121 | 0, /* src_mask */ | |
122 | 0x0007fff8, /* dst_mask */ | |
123 | FALSE), /* pcrel_offset */ | |
124 | ||
125 | /* 32 bit absolute. */ | |
126 | HOWTO (R_METAG_ADDR32, /* type */ | |
127 | 0, /* rightshift */ | |
128 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
129 | 32, /* bitsize */ | |
130 | FALSE, /* pc_relative */ | |
131 | 0, /* bitpos */ | |
132 | complain_overflow_bitfield, /* complain_on_overflow */ | |
133 | bfd_elf_generic_reloc, /* special_function */ | |
134 | "R_METAG_ADDR32", /* name */ | |
135 | FALSE, /* partial_inplace */ | |
136 | 0x00000000, /* src_mask */ | |
137 | 0xffffffff, /* dst_mask */ | |
138 | FALSE), /* pcrel_offset */ | |
139 | ||
140 | /* No relocation. */ | |
141 | HOWTO (R_METAG_NONE, /* type */ | |
142 | 0, /* rightshift */ | |
6346d5ca | 143 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
a3c62988 NC |
144 | 0, /* bitsize */ |
145 | FALSE, /* pc_relative */ | |
146 | 0, /* bitpos */ | |
147 | complain_overflow_dont, /* complain_on_overflow */ | |
148 | bfd_elf_generic_reloc, /* special_function */ | |
149 | "R_METAG_NONE", /* name */ | |
150 | FALSE, /* partial_inplace */ | |
151 | 0, /* src_mask */ | |
152 | 0, /* dst_mask */ | |
153 | FALSE), /* pcrel_offset */ | |
154 | ||
155 | /* 19 bit pc relative */ | |
156 | HOWTO (R_METAG_RELBRANCH, /* type */ | |
157 | 2, /* rightshift */ | |
158 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
159 | 19, /* bitsize */ | |
160 | TRUE, /* pc_relative */ | |
161 | 5, /* bitpos */ | |
162 | complain_overflow_signed, /* complain_on_overflow */ | |
163 | bfd_elf_generic_reloc, /* special_function */ | |
164 | "R_METAG_RELBRANCH", /* name */ | |
165 | FALSE, /* partial_inplace */ | |
166 | 0, /* src_mask */ | |
167 | 0x00ffffe0, /* dst_mask */ | |
168 | FALSE), /* pcrel_offset */ | |
169 | ||
170 | /* GET/SET offset */ | |
171 | HOWTO (R_METAG_GETSETOFF, /* type */ | |
172 | 0, /* rightshift */ | |
173 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
174 | 12, /* bitsize */ | |
175 | FALSE, /* pc_relative */ | |
176 | 7, /* bitpos */ | |
177 | complain_overflow_dont, /* complain_on_overflow */ | |
178 | bfd_elf_generic_reloc, /* special_function */ | |
179 | "R_METAG_GETSETOFF", /* name */ | |
180 | FALSE, /* partial_inplace */ | |
181 | 0, /* src_mask */ | |
182 | 0, /* dst_mask */ | |
183 | FALSE), /* pcrel_offset */ | |
184 | ||
185 | EMPTY_HOWTO (6), | |
186 | EMPTY_HOWTO (7), | |
187 | EMPTY_HOWTO (8), | |
188 | EMPTY_HOWTO (9), | |
189 | EMPTY_HOWTO (10), | |
190 | EMPTY_HOWTO (11), | |
191 | EMPTY_HOWTO (12), | |
192 | EMPTY_HOWTO (13), | |
193 | EMPTY_HOWTO (14), | |
194 | EMPTY_HOWTO (15), | |
195 | EMPTY_HOWTO (16), | |
196 | EMPTY_HOWTO (17), | |
197 | EMPTY_HOWTO (18), | |
198 | EMPTY_HOWTO (19), | |
199 | EMPTY_HOWTO (20), | |
200 | EMPTY_HOWTO (21), | |
201 | EMPTY_HOWTO (22), | |
202 | EMPTY_HOWTO (23), | |
203 | EMPTY_HOWTO (24), | |
204 | EMPTY_HOWTO (25), | |
205 | EMPTY_HOWTO (26), | |
206 | EMPTY_HOWTO (27), | |
207 | EMPTY_HOWTO (28), | |
208 | EMPTY_HOWTO (29), | |
209 | ||
210 | HOWTO (R_METAG_GNU_VTINHERIT, /* type */ | |
211 | 0, /* rightshift */ | |
212 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
213 | 0, /* bitsize */ | |
214 | FALSE, /* pc_relative */ | |
215 | 0, /* bitpos */ | |
216 | complain_overflow_dont, /* complain_on_overflow */ | |
217 | NULL, /* special_function */ | |
218 | "R_METAG_GNU_VTINHERIT", /* name */ | |
219 | FALSE, /* partial_inplace */ | |
220 | 0, /* src_mask */ | |
221 | 0, /* dst_mask */ | |
222 | FALSE), /* pcrel_offset */ | |
223 | ||
224 | HOWTO (R_METAG_GNU_VTENTRY, /* type */ | |
225 | 0, /* rightshift */ | |
226 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
227 | 0, /* bitsize */ | |
228 | FALSE, /* pc_relative */ | |
229 | 0, /* bitpos */ | |
230 | complain_overflow_dont, /* complain_on_overflow */ | |
231 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
232 | "R_METAG_GNU_VTENTRY", /* name */ | |
233 | FALSE, /* partial_inplace */ | |
234 | 0, /* src_mask */ | |
235 | 0, /* dst_mask */ | |
236 | FALSE), /* pcrel_offset */ | |
237 | ||
238 | /* High order 16 bit GOT offset */ | |
239 | HOWTO (R_METAG_HI16_GOTOFF, /* type */ | |
240 | 16, /* rightshift */ | |
241 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
242 | 16, /* bitsize */ | |
243 | FALSE, /* pc_relative */ | |
244 | 3, /* bitpos */ | |
245 | complain_overflow_dont, /* complain_on_overflow */ | |
246 | bfd_elf_generic_reloc, /* special_function */ | |
247 | "R_METAG_HI16_GOTOFF", /* name */ | |
248 | FALSE, /* partial_inplace */ | |
249 | 0, /* src_mask */ | |
250 | 0x0007fff8, /* dst_mask */ | |
251 | FALSE), /* pcrel_offset */ | |
252 | ||
253 | /* Low order 16 bit GOT offset */ | |
254 | HOWTO (R_METAG_LO16_GOTOFF, /* type */ | |
255 | 0, /* rightshift */ | |
256 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
257 | 16, /* bitsize */ | |
258 | FALSE, /* pc_relative */ | |
259 | 3, /* bitpos */ | |
260 | complain_overflow_dont, /* complain_on_overflow */ | |
261 | bfd_elf_generic_reloc, /* special_function */ | |
262 | "R_METAG_LO16_GOTOFF", /* name */ | |
263 | FALSE, /* partial_inplace */ | |
264 | 0, /* src_mask */ | |
265 | 0x0007fff8, /* dst_mask */ | |
266 | FALSE), /* pcrel_offset */ | |
267 | ||
268 | /* GET/SET GOT offset */ | |
269 | HOWTO (R_METAG_GETSET_GOTOFF, /* type */ | |
270 | 0, /* rightshift */ | |
271 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
272 | 12, /* bitsize */ | |
273 | FALSE, /* pc_relative */ | |
274 | 7, /* bitpos */ | |
275 | complain_overflow_dont, /* complain_on_overflow */ | |
276 | bfd_elf_generic_reloc, /* special_function */ | |
277 | "R_METAG_GETSET_GOTOFF", /* name */ | |
278 | FALSE, /* partial_inplace */ | |
279 | 0, /* src_mask */ | |
280 | 0, /* dst_mask */ | |
281 | FALSE), /* pcrel_offset */ | |
282 | ||
283 | /* GET/SET GOT relative */ | |
284 | HOWTO (R_METAG_GETSET_GOT, /* type */ | |
285 | 0, /* rightshift */ | |
286 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
287 | 12, /* bitsize */ | |
288 | FALSE, /* pc_relative */ | |
289 | 7, /* bitpos */ | |
290 | complain_overflow_dont, /* complain_on_overflow */ | |
291 | bfd_elf_generic_reloc, /* special_function */ | |
292 | "R_METAG_GETSET_GOT", /* name */ | |
293 | FALSE, /* partial_inplace */ | |
294 | 0, /* src_mask */ | |
295 | 0, /* dst_mask */ | |
296 | FALSE), /* pcrel_offset */ | |
297 | ||
298 | /* High order 16 bit GOT reference */ | |
299 | HOWTO (R_METAG_HI16_GOTPC, /* type */ | |
300 | 16, /* rightshift */ | |
301 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
302 | 16, /* bitsize */ | |
303 | FALSE, /* pc_relative */ | |
304 | 3, /* bitpos */ | |
305 | complain_overflow_dont, /* complain_on_overflow */ | |
306 | bfd_elf_generic_reloc, /* special_function */ | |
307 | "R_METAG_HI16_GOTPC", /* name */ | |
308 | FALSE, /* partial_inplace */ | |
309 | 0, /* src_mask */ | |
310 | 0x0007fff8, /* dst_mask */ | |
311 | FALSE), /* pcrel_offset */ | |
312 | ||
313 | /* Low order 16 bit GOT reference */ | |
314 | HOWTO (R_METAG_LO16_GOTPC, /* type */ | |
315 | 0, /* rightshift */ | |
316 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
317 | 16, /* bitsize */ | |
318 | FALSE, /* pc_relative */ | |
319 | 3, /* bitpos */ | |
320 | complain_overflow_dont, /* complain_on_overflow */ | |
321 | bfd_elf_generic_reloc, /* special_function */ | |
322 | "R_METAG_LO16_GOTPC", /* name */ | |
323 | FALSE, /* partial_inplace */ | |
324 | 0, /* src_mask */ | |
325 | 0x0007fff8, /* dst_mask */ | |
326 | FALSE), /* pcrel_offset */ | |
327 | ||
328 | /* High order 16 bit PLT */ | |
329 | HOWTO (R_METAG_HI16_PLT, /* type */ | |
330 | 16, /* rightshift */ | |
331 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
332 | 16, /* bitsize */ | |
333 | FALSE, /* pc_relative */ | |
334 | 3, /* bitpos */ | |
335 | complain_overflow_dont, /* complain_on_overflow */ | |
336 | bfd_elf_generic_reloc, /* special_function */ | |
337 | "R_METAG_HI16_PLT", /* name */ | |
338 | FALSE, /* partial_inplace */ | |
339 | 0, /* src_mask */ | |
340 | 0x0007fff8, /* dst_mask */ | |
341 | FALSE), /* pcrel_offset */ | |
342 | ||
343 | /* Low order 16 bit PLT */ | |
344 | HOWTO (R_METAG_LO16_PLT, /* type */ | |
345 | 0, /* rightshift */ | |
346 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
347 | 16, /* bitsize */ | |
348 | FALSE, /* pc_relative */ | |
349 | 3, /* bitpos */ | |
350 | complain_overflow_dont, /* complain_on_overflow */ | |
351 | bfd_elf_generic_reloc, /* special_function */ | |
352 | "R_METAG_LO16_PLT", /* name */ | |
353 | FALSE, /* partial_inplace */ | |
354 | 0, /* src_mask */ | |
355 | 0xffffffff, /* dst_mask */ | |
356 | FALSE), /* pcrel_offset */ | |
357 | ||
358 | HOWTO (R_METAG_RELBRANCH_PLT, /* type */ | |
359 | 2, /* rightshift */ | |
360 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
361 | 19, /* bitsize */ | |
362 | TRUE, /* pc_relative */ | |
363 | 5, /* bitpos */ | |
364 | complain_overflow_signed, /* complain_on_overflow */ | |
365 | bfd_elf_generic_reloc, /* special_function */ | |
366 | "R_METAG_RELBRANCH_PLT", /* name */ | |
367 | FALSE, /* partial_inplace */ | |
368 | 0, /* src_mask */ | |
369 | 0x00ffffe0, /* dst_mask */ | |
370 | FALSE), /* pcrel_offset */ | |
371 | ||
372 | /* Dummy relocs used by the linker internally. */ | |
373 | HOWTO (R_METAG_GOTOFF, /* type */ | |
374 | 0, /* rightshift */ | |
375 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
376 | 32, /* bitsize */ | |
377 | FALSE, /* pc_relative */ | |
378 | 0, /* bitpos */ | |
379 | complain_overflow_bitfield, /* complain_on_overflow */ | |
380 | bfd_elf_generic_reloc, /* special_function */ | |
381 | "R_METAG_GOTOFF", /* name */ | |
382 | FALSE, /* partial_inplace */ | |
383 | 0xffffffff, /* src_mask */ | |
384 | 0xffffffff, /* dst_mask */ | |
385 | FALSE), /* pcrel_offset */ | |
386 | ||
387 | HOWTO (R_METAG_PLT, /* type */ | |
388 | 0, /* rightshift */ | |
389 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
390 | 32, /* bitsize */ | |
391 | FALSE, /* pc_relative */ | |
392 | 0, /* bitpos */ | |
393 | complain_overflow_bitfield, /* complain_on_overflow */ | |
394 | bfd_elf_generic_reloc, /* special_function */ | |
395 | "R_METAG_GOTOFF", /* name */ | |
396 | FALSE, /* partial_inplace */ | |
397 | 0xffffffff, /* src_mask */ | |
398 | 0xffffffff, /* dst_mask */ | |
399 | FALSE), /* pcrel_offset */ | |
400 | ||
401 | /* This is used only by the dynamic linker. The symbol should exist | |
402 | both in the object being run and in some shared library. The | |
403 | dynamic linker copies the data addressed by the symbol from the | |
404 | shared library into the object, because the object being | |
405 | run has to have the data at some particular address. */ | |
406 | HOWTO (R_METAG_COPY, /* type */ | |
407 | 0, /* rightshift */ | |
408 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
409 | 32, /* bitsize */ | |
410 | FALSE, /* pc_relative */ | |
411 | 0, /* bitpos */ | |
412 | complain_overflow_bitfield, /* complain_on_overflow */ | |
413 | bfd_elf_generic_reloc, /* special_function */ | |
414 | "R_METAG_COPY", /* name */ | |
415 | FALSE, /* partial_inplace */ | |
416 | 0xffffffff, /* src_mask */ | |
417 | 0xffffffff, /* dst_mask */ | |
418 | FALSE), /* pcrel_offset */ | |
419 | ||
420 | /* Marks a procedure linkage table entry for a symbol. */ | |
421 | HOWTO (R_METAG_JMP_SLOT, /* type */ | |
422 | 0, /* rightshift */ | |
423 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
424 | 32, /* bitsize */ | |
425 | FALSE, /* pc_relative */ | |
426 | 0, /* bitpos */ | |
427 | complain_overflow_bitfield, /* complain_on_overflow */ | |
428 | bfd_elf_generic_reloc, /* special_function */ | |
429 | "R_METAG_JMP_SLOT", /* name */ | |
430 | FALSE, /* partial_inplace */ | |
431 | 0xffffffff, /* src_mask */ | |
432 | 0xffffffff, /* dst_mask */ | |
433 | FALSE), /* pcrel_offset */ | |
434 | ||
435 | /* Used only by the dynamic linker. When the object is run, this | |
436 | longword is set to the load address of the object, plus the | |
437 | addend. */ | |
438 | HOWTO (R_METAG_RELATIVE, /* type */ | |
439 | 0, /* rightshift */ | |
440 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
441 | 32, /* bitsize */ | |
442 | FALSE, /* pc_relative */ | |
443 | 0, /* bitpos */ | |
444 | complain_overflow_bitfield, /* complain_on_overflow */ | |
445 | bfd_elf_generic_reloc, /* special_function */ | |
446 | "R_METAG_RELATIVE", /* name */ | |
447 | FALSE, /* partial_inplace */ | |
448 | 0xffffffff, /* src_mask */ | |
449 | 0xffffffff, /* dst_mask */ | |
450 | FALSE), /* pcrel_offset */ | |
451 | ||
452 | HOWTO (R_METAG_GLOB_DAT, /* type */ | |
453 | 0, /* rightshift */ | |
454 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
455 | 32, /* bitsize */ | |
456 | FALSE, /* pc_relative */ | |
457 | 0, /* bitpos */ | |
458 | complain_overflow_bitfield, /* complain_on_overflow */ | |
459 | bfd_elf_generic_reloc, /* special_function */ | |
460 | "R_METAG_GLOB_DAT", /* name */ | |
461 | FALSE, /* partial_inplace */ | |
462 | 0xffffffff, /* src_mask */ | |
463 | 0xffffffff, /* dst_mask */ | |
464 | FALSE), /* pcrel_offset */ | |
465 | ||
466 | HOWTO (R_METAG_TLS_GD, /* type */ | |
467 | 0, /* rightshift */ | |
468 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
469 | 16, /* bitsize */ | |
470 | FALSE, /* pc_relative */ | |
471 | 3, /* bitpos */ | |
472 | complain_overflow_dont, /* complain_on_overflow */ | |
473 | bfd_elf_generic_reloc, /* special_function */ | |
474 | "R_METAG_TLS_GD", /* name */ | |
475 | FALSE, /* partial_inplace */ | |
476 | 0, /* src_mask */ | |
477 | 0x0007fff8, /* dst_mask */ | |
478 | FALSE), /* pcrel_offset */ | |
479 | ||
480 | HOWTO (R_METAG_TLS_LDM, /* type */ | |
481 | 0, /* rightshift */ | |
482 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
483 | 16, /* bitsize */ | |
484 | FALSE, /* pc_relative */ | |
485 | 3, /* bitpos */ | |
486 | complain_overflow_bitfield, /* complain_on_overflow */ | |
487 | bfd_elf_generic_reloc, /* special_function */ | |
488 | "R_METAG_TLS_LDM", /* name */ | |
489 | FALSE, /* partial_inplace */ | |
490 | 0, /* src_mask */ | |
491 | 0x0007fff8, /* dst_mask */ | |
492 | FALSE), /* pcrel_offset */ | |
493 | ||
494 | HOWTO (R_METAG_TLS_LDO_HI16, /* type */ | |
495 | 16, /* rightshift */ | |
496 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
497 | 16, /* bitsize */ | |
498 | FALSE, /* pc_relative */ | |
499 | 3, /* bitpos */ | |
500 | complain_overflow_bitfield, /* complain_on_overflow */ | |
501 | bfd_elf_generic_reloc, /* special_function */ | |
502 | "R_METAG_TLS_LDO_HI16", /* name */ | |
503 | FALSE, /* partial_inplace */ | |
504 | 0, /* src_mask */ | |
505 | 0x0007fff8, /* dst_mask */ | |
506 | FALSE), /* pcrel_offset */ | |
507 | ||
508 | HOWTO (R_METAG_TLS_LDO_LO16, /* type */ | |
509 | 0, /* rightshift */ | |
510 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
511 | 16, /* bitsize */ | |
512 | FALSE, /* pc_relative */ | |
513 | 3, /* bitpos */ | |
514 | complain_overflow_bitfield, /* complain_on_overflow */ | |
515 | bfd_elf_generic_reloc, /* special_function */ | |
516 | "R_METAG_TLS_LDO_LO16", /* name */ | |
517 | FALSE, /* partial_inplace */ | |
518 | 0, /* src_mask */ | |
519 | 0x0007fff8, /* dst_mask */ | |
520 | FALSE), /* pcrel_offset */ | |
521 | ||
522 | /* Dummy reloc used by the linker internally. */ | |
523 | HOWTO (R_METAG_TLS_LDO, /* type */ | |
524 | 0, /* rightshift */ | |
525 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
526 | 16, /* bitsize */ | |
527 | FALSE, /* pc_relative */ | |
528 | 3, /* bitpos */ | |
529 | complain_overflow_bitfield, /* complain_on_overflow */ | |
530 | bfd_elf_generic_reloc, /* special_function */ | |
531 | "R_METAG_TLS_LDO", /* name */ | |
532 | FALSE, /* partial_inplace */ | |
533 | 0, /* src_mask */ | |
534 | 0x0007fff8, /* dst_mask */ | |
535 | FALSE), /* pcrel_offset */ | |
536 | ||
537 | HOWTO (R_METAG_TLS_IE, /* type */ | |
538 | 2, /* rightshift */ | |
539 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
540 | 12, /* bitsize */ | |
541 | FALSE, /* pc_relative */ | |
542 | 7, /* bitpos */ | |
543 | complain_overflow_dont, /* complain_on_overflow */ | |
544 | bfd_elf_generic_reloc, /* special_function */ | |
545 | "R_METAG_TLS_IE", /* name */ | |
546 | FALSE, /* partial_inplace */ | |
547 | 0, /* src_mask */ | |
548 | 0x0007ff80, /* dst_mask */ | |
549 | FALSE), /* pcrel_offset */ | |
550 | ||
551 | /* Dummy reloc used by the linker internally. */ | |
552 | HOWTO (R_METAG_TLS_IENONPIC, /* type */ | |
553 | 0, /* rightshift */ | |
554 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
555 | 16, /* bitsize */ | |
556 | FALSE, /* pc_relative */ | |
557 | 3, /* bitpos */ | |
558 | complain_overflow_dont, /* complain_on_overflow */ | |
559 | bfd_elf_generic_reloc, /* special_function */ | |
560 | "R_METAG_TLS_IENONPIC", /* name */ | |
561 | FALSE, /* partial_inplace */ | |
562 | 0, /* src_mask */ | |
563 | 0x0007fff8, /* dst_mask */ | |
564 | FALSE), /* pcrel_offset */ | |
565 | ||
566 | HOWTO (R_METAG_TLS_IENONPIC_HI16,/* type */ | |
567 | 16, /* rightshift */ | |
568 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
569 | 16, /* bitsize */ | |
570 | FALSE, /* pc_relative */ | |
571 | 3, /* bitpos */ | |
572 | complain_overflow_dont, /* complain_on_overflow */ | |
573 | bfd_elf_generic_reloc, /* special_function */ | |
574 | "R_METAG_TLS_IENONPIC_HI16", /* name */ | |
575 | FALSE, /* partial_inplace */ | |
576 | 0, /* src_mask */ | |
577 | 0x0007fff8, /* dst_mask */ | |
578 | FALSE), /* pcrel_offset */ | |
579 | ||
580 | HOWTO (R_METAG_TLS_IENONPIC_LO16,/* type */ | |
581 | 0, /* rightshift */ | |
582 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
583 | 16, /* bitsize */ | |
584 | FALSE, /* pc_relative */ | |
585 | 3, /* bitpos */ | |
586 | complain_overflow_dont, /* complain_on_overflow */ | |
587 | bfd_elf_generic_reloc, /* special_function */ | |
588 | "R_METAG_TLS_IENONPIC_LO16", /* name */ | |
589 | FALSE, /* partial_inplace */ | |
590 | 0, /* src_mask */ | |
591 | 0x0007fff8, /* dst_mask */ | |
592 | FALSE), /* pcrel_offset */ | |
593 | ||
594 | HOWTO (R_METAG_TLS_TPOFF, /* type */ | |
595 | 0, /* rightshift */ | |
596 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
597 | 32, /* bitsize */ | |
598 | FALSE, /* pc_relative */ | |
599 | 0, /* bitpos */ | |
600 | complain_overflow_bitfield, /* complain_on_overflow */ | |
601 | bfd_elf_generic_reloc, /* special_function */ | |
602 | "R_METAG_TLS_TPOFF", /* name */ | |
603 | FALSE, /* partial_inplace */ | |
604 | 0, /* src_mask */ | |
605 | 0xffffffff, /* dst_mask */ | |
606 | FALSE), /* pcrel_offset */ | |
607 | ||
608 | HOWTO (R_METAG_TLS_DTPMOD, /* type */ | |
609 | 0, /* rightshift */ | |
610 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
611 | 32, /* bitsize */ | |
612 | FALSE, /* pc_relative */ | |
613 | 0, /* bitpos */ | |
614 | complain_overflow_bitfield, /* complain_on_overflow */ | |
615 | bfd_elf_generic_reloc, /* special_function */ | |
616 | "R_METAG_TLS_DTPMOD", /* name */ | |
617 | FALSE, /* partial_inplace */ | |
618 | 0, /* src_mask */ | |
619 | 0xffffffff, /* dst_mask */ | |
620 | FALSE), /* pcrel_offset */ | |
621 | ||
622 | HOWTO (R_METAG_TLS_DTPOFF, /* type */ | |
623 | 0, /* rightshift */ | |
624 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
625 | 32, /* bitsize */ | |
626 | FALSE, /* pc_relative */ | |
627 | 0, /* bitpos */ | |
628 | complain_overflow_bitfield, /* complain_on_overflow */ | |
629 | bfd_elf_generic_reloc, /* special_function */ | |
630 | "R_METAG_TLS_DTPOFF", /* name */ | |
631 | FALSE, /* partial_inplace */ | |
632 | 0, /* src_mask */ | |
633 | 0xffffffff, /* dst_mask */ | |
634 | FALSE), /* pcrel_offset */ | |
635 | ||
636 | /* Dummy reloc used by the linker internally. */ | |
637 | HOWTO (R_METAG_TLS_LE, /* type */ | |
638 | 0, /* rightshift */ | |
639 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
640 | 32, /* bitsize */ | |
641 | FALSE, /* pc_relative */ | |
642 | 0, /* bitpos */ | |
643 | complain_overflow_bitfield, /* complain_on_overflow */ | |
644 | bfd_elf_generic_reloc, /* special_function */ | |
645 | "R_METAG_TLS_LE", /* name */ | |
646 | FALSE, /* partial_inplace */ | |
647 | 0, /* src_mask */ | |
648 | 0xffffffff, /* dst_mask */ | |
649 | FALSE), /* pcrel_offset */ | |
650 | ||
651 | HOWTO (R_METAG_TLS_LE_HI16, /* type */ | |
652 | 16, /* rightshift */ | |
653 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
654 | 16, /* bitsize */ | |
655 | FALSE, /* pc_relative */ | |
656 | 3, /* bitpos */ | |
657 | complain_overflow_dont, /* complain_on_overflow */ | |
658 | bfd_elf_generic_reloc, /* special_function */ | |
659 | "R_METAG_TLS_LE_HI16", /* name */ | |
660 | FALSE, /* partial_inplace */ | |
661 | 0, /* src_mask */ | |
662 | 0x0007fff8, /* dst_mask */ | |
663 | FALSE), /* pcrel_offset */ | |
664 | ||
665 | HOWTO (R_METAG_TLS_LE_LO16, /* type */ | |
666 | 0, /* rightshift */ | |
667 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
668 | 16, /* bitsize */ | |
669 | FALSE, /* pc_relative */ | |
670 | 3, /* bitpos */ | |
671 | complain_overflow_dont, /* complain_on_overflow */ | |
672 | bfd_elf_generic_reloc, /* special_function */ | |
673 | "R_METAG_TLS_LE_LO16", /* name */ | |
674 | FALSE, /* partial_inplace */ | |
675 | 0, /* src_mask */ | |
676 | 0x0007fff8, /* dst_mask */ | |
677 | FALSE), /* pcrel_offset */ | |
678 | ||
679 | }; | |
680 | ||
681 | #define BRANCH_BITS 19 | |
682 | ||
683 | /* The GOT is typically accessed using a [GS]ETD instruction. The size of the | |
684 | immediate offset which can be used in such instructions therefore limits | |
685 | the usable size of the GOT. If the base register for the [GS]ETD (A1LbP) | |
686 | is pointing to the base of the GOT then the size is limited to the maximum | |
687 | 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset | |
688 | in a [GS]ETD instruction is signed, so by setting the base address register | |
689 | to an offset of that 0x2000 byte maximum unsigned offset from the base of | |
690 | the GOT we can use negative offsets in addition to positive. This | |
691 | effectively doubles the usable GOT size to 0x4000 bytes. */ | |
692 | #define GOT_REG_OFFSET 0x2000 | |
693 | ||
694 | struct metag_reloc_map | |
695 | { | |
696 | bfd_reloc_code_real_type bfd_reloc_val; | |
697 | unsigned int metag_reloc_val; | |
698 | }; | |
699 | ||
700 | static const struct metag_reloc_map metag_reloc_map [] = | |
701 | { | |
07d6d2b8 AM |
702 | { BFD_RELOC_NONE, R_METAG_NONE }, |
703 | { BFD_RELOC_32, R_METAG_ADDR32 }, | |
704 | { BFD_RELOC_METAG_HIADDR16, R_METAG_HIADDR16 }, | |
705 | { BFD_RELOC_METAG_LOADDR16, R_METAG_LOADDR16 }, | |
a3c62988 NC |
706 | { BFD_RELOC_METAG_RELBRANCH, R_METAG_RELBRANCH }, |
707 | { BFD_RELOC_METAG_GETSETOFF, R_METAG_GETSETOFF }, | |
07d6d2b8 AM |
708 | { BFD_RELOC_VTABLE_INHERIT, R_METAG_GNU_VTINHERIT }, |
709 | { BFD_RELOC_VTABLE_ENTRY, R_METAG_GNU_VTENTRY }, | |
710 | { BFD_RELOC_METAG_REL8, R_METAG_REL8 }, | |
711 | { BFD_RELOC_METAG_REL16, R_METAG_REL16 }, | |
a3c62988 NC |
712 | { BFD_RELOC_METAG_HI16_GOTOFF, R_METAG_HI16_GOTOFF }, |
713 | { BFD_RELOC_METAG_LO16_GOTOFF, R_METAG_LO16_GOTOFF }, | |
714 | { BFD_RELOC_METAG_GETSET_GOTOFF, R_METAG_GETSET_GOTOFF }, | |
715 | { BFD_RELOC_METAG_GETSET_GOT, R_METAG_GETSET_GOT }, | |
716 | { BFD_RELOC_METAG_HI16_GOTPC, R_METAG_HI16_GOTPC }, | |
717 | { BFD_RELOC_METAG_LO16_GOTPC, R_METAG_LO16_GOTPC }, | |
07d6d2b8 AM |
718 | { BFD_RELOC_METAG_HI16_PLT, R_METAG_HI16_PLT }, |
719 | { BFD_RELOC_METAG_LO16_PLT, R_METAG_LO16_PLT }, | |
a3c62988 | 720 | { BFD_RELOC_METAG_RELBRANCH_PLT, R_METAG_RELBRANCH_PLT }, |
07d6d2b8 AM |
721 | { BFD_RELOC_METAG_GOTOFF, R_METAG_GOTOFF }, |
722 | { BFD_RELOC_METAG_PLT, R_METAG_PLT }, | |
723 | { BFD_RELOC_METAG_COPY, R_METAG_COPY }, | |
724 | { BFD_RELOC_METAG_JMP_SLOT, R_METAG_JMP_SLOT }, | |
725 | { BFD_RELOC_METAG_RELATIVE, R_METAG_RELATIVE }, | |
726 | { BFD_RELOC_METAG_GLOB_DAT, R_METAG_GLOB_DAT }, | |
727 | { BFD_RELOC_METAG_TLS_GD, R_METAG_TLS_GD }, | |
728 | { BFD_RELOC_METAG_TLS_LDM, R_METAG_TLS_LDM }, | |
a3c62988 NC |
729 | { BFD_RELOC_METAG_TLS_LDO_HI16, R_METAG_TLS_LDO_HI16 }, |
730 | { BFD_RELOC_METAG_TLS_LDO_LO16, R_METAG_TLS_LDO_LO16 }, | |
07d6d2b8 AM |
731 | { BFD_RELOC_METAG_TLS_LDO, R_METAG_TLS_LDO }, |
732 | { BFD_RELOC_METAG_TLS_IE, R_METAG_TLS_IE }, | |
a3c62988 NC |
733 | { BFD_RELOC_METAG_TLS_IENONPIC, R_METAG_TLS_IENONPIC }, |
734 | { BFD_RELOC_METAG_TLS_IENONPIC_HI16, R_METAG_TLS_IENONPIC_HI16 }, | |
735 | { BFD_RELOC_METAG_TLS_IENONPIC_LO16, R_METAG_TLS_IENONPIC_LO16 }, | |
736 | { BFD_RELOC_METAG_TLS_TPOFF, R_METAG_TLS_TPOFF }, | |
737 | { BFD_RELOC_METAG_TLS_DTPMOD, R_METAG_TLS_DTPMOD }, | |
738 | { BFD_RELOC_METAG_TLS_DTPOFF, R_METAG_TLS_DTPOFF }, | |
07d6d2b8 | 739 | { BFD_RELOC_METAG_TLS_LE, R_METAG_TLS_LE }, |
a3c62988 NC |
740 | { BFD_RELOC_METAG_TLS_LE_HI16, R_METAG_TLS_LE_HI16 }, |
741 | { BFD_RELOC_METAG_TLS_LE_LO16, R_METAG_TLS_LE_LO16 }, | |
742 | }; | |
743 | ||
744 | enum elf_metag_stub_type | |
745 | { | |
746 | metag_stub_long_branch, | |
747 | metag_stub_long_branch_shared, | |
748 | metag_stub_none | |
749 | }; | |
750 | ||
751 | struct elf_metag_stub_hash_entry | |
752 | { | |
753 | /* Base hash table entry structure. */ | |
754 | struct bfd_hash_entry bh_root; | |
755 | ||
756 | /* The stub section. */ | |
757 | asection *stub_sec; | |
758 | ||
759 | /* Offset within stub_sec of the beginning of this stub. */ | |
760 | bfd_vma stub_offset; | |
761 | ||
762 | /* Given the symbol's value and its section we can determine its final | |
763 | value when building the stubs (so the stub knows where to jump. */ | |
764 | bfd_vma target_value; | |
765 | asection *target_section; | |
766 | ||
767 | enum elf_metag_stub_type stub_type; | |
768 | ||
769 | /* The symbol table entry, if any, that this was derived from. */ | |
770 | struct elf_metag_link_hash_entry *hh; | |
771 | ||
772 | /* And the reloc addend that this was derived from. */ | |
773 | bfd_vma addend; | |
774 | ||
775 | /* Where this stub is being called from, or, in the case of combined | |
776 | stub sections, the first input section in the group. */ | |
777 | asection *id_sec; | |
778 | }; | |
779 | ||
780 | struct elf_metag_link_hash_entry | |
781 | { | |
782 | struct elf_link_hash_entry eh; | |
783 | ||
784 | /* A pointer to the most recently used stub hash entry against this | |
785 | symbol. */ | |
786 | struct elf_metag_stub_hash_entry *hsh_cache; | |
787 | ||
a3c62988 NC |
788 | enum |
789 | { | |
790 | GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8 | |
791 | } tls_type; | |
792 | }; | |
793 | ||
794 | struct elf_metag_link_hash_table | |
795 | { | |
796 | /* The main hash table. */ | |
797 | struct elf_link_hash_table etab; | |
798 | ||
799 | /* The stub hash table. */ | |
800 | struct bfd_hash_table bstab; | |
801 | ||
802 | /* Linker stub bfd. */ | |
803 | bfd *stub_bfd; | |
804 | ||
805 | /* Linker call-backs. */ | |
806 | asection * (*add_stub_section) (const char *, asection *); | |
807 | void (*layout_sections_again) (void); | |
808 | ||
809 | /* Array to keep track of which stub sections have been created, and | |
810 | information on stub grouping. */ | |
811 | struct map_stub | |
812 | { | |
813 | /* This is the section to which stubs in the group will be | |
814 | attached. */ | |
815 | asection *link_sec; | |
816 | /* The stub section. */ | |
817 | asection *stub_sec; | |
818 | } *stub_group; | |
819 | ||
820 | /* Assorted information used by elf_metag_size_stubs. */ | |
821 | unsigned int bfd_count; | |
7292b3ac | 822 | unsigned int top_index; |
a3c62988 NC |
823 | asection **input_list; |
824 | Elf_Internal_Sym **all_local_syms; | |
825 | ||
a3c62988 NC |
826 | /* Data for LDM relocations. */ |
827 | union | |
828 | { | |
829 | bfd_signed_vma refcount; | |
830 | bfd_vma offset; | |
831 | } tls_ldm_got; | |
832 | }; | |
833 | ||
834 | /* Return the base vma address which should be subtracted from the | |
835 | real address when resolving a dtpoff relocation. This is PT_TLS | |
836 | segment p_vaddr. */ | |
837 | static bfd_vma | |
838 | dtpoff_base (struct bfd_link_info *info) | |
839 | { | |
840 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
841 | if (elf_hash_table (info)->tls_sec == NULL) | |
842 | return 0; | |
843 | return elf_hash_table (info)->tls_sec->vma; | |
844 | } | |
845 | ||
846 | /* Return the relocation value for R_METAG_TLS_IE */ | |
847 | static bfd_vma | |
848 | tpoff (struct bfd_link_info *info, bfd_vma address) | |
849 | { | |
850 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
851 | if (elf_hash_table (info)->tls_sec == NULL) | |
852 | return 0; | |
853 | /* METAG TLS ABI is variant I and static TLS blocks start just after | |
854 | tcbhead structure which has 2 pointer fields. */ | |
855 | return (address - elf_hash_table (info)->tls_sec->vma | |
856 | + align_power ((bfd_vma) 8, | |
857 | elf_hash_table (info)->tls_sec->alignment_power)); | |
858 | } | |
859 | ||
f3185997 | 860 | static bfd_boolean |
0aa13fee | 861 | metag_info_to_howto_rela (bfd *abfd, |
a3c62988 NC |
862 | arelent *cache_ptr, |
863 | Elf_Internal_Rela *dst) | |
864 | { | |
865 | unsigned int r_type; | |
866 | ||
867 | r_type = ELF32_R_TYPE (dst->r_info); | |
5860e3f8 NC |
868 | if (r_type >= (unsigned int) R_METAG_MAX) |
869 | { | |
695344c0 | 870 | /* xgettext:c-format */ |
0aa13fee AM |
871 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
872 | abfd, r_type); | |
f3185997 NC |
873 | bfd_set_error (bfd_error_bad_value); |
874 | return FALSE; | |
5860e3f8 | 875 | } |
a3c62988 | 876 | cache_ptr->howto = & elf_metag_howto_table [r_type]; |
f3185997 | 877 | return TRUE; |
a3c62988 NC |
878 | } |
879 | ||
880 | static reloc_howto_type * | |
881 | metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, | |
882 | bfd_reloc_code_real_type code) | |
883 | { | |
884 | unsigned int i; | |
885 | ||
886 | for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++) | |
887 | if (metag_reloc_map [i].bfd_reloc_val == code) | |
888 | return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val]; | |
889 | ||
890 | return NULL; | |
891 | } | |
892 | ||
893 | static reloc_howto_type * | |
894 | metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
895 | const char *r_name) | |
896 | { | |
897 | unsigned int i; | |
898 | ||
899 | for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++) | |
900 | if (elf_metag_howto_table[i].name != NULL | |
901 | && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0) | |
902 | return &elf_metag_howto_table[i]; | |
903 | ||
904 | return NULL; | |
905 | } | |
906 | ||
907 | /* Various hash macros and functions. */ | |
908 | #define metag_link_hash_table(p) \ | |
909 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ | |
910 | == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL) | |
911 | ||
912 | #define metag_elf_hash_entry(ent) \ | |
913 | ((struct elf_metag_link_hash_entry *)(ent)) | |
914 | ||
915 | #define metag_stub_hash_entry(ent) \ | |
916 | ((struct elf_metag_stub_hash_entry *)(ent)) | |
917 | ||
918 | #define metag_stub_hash_lookup(table, string, create, copy) \ | |
919 | ((struct elf_metag_stub_hash_entry *) \ | |
920 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
921 | ||
922 | #define metag_elf_local_got_tls_type(abfd) \ | |
923 | ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info))) | |
924 | ||
925 | /* Assorted hash table functions. */ | |
926 | ||
927 | /* Initialize an entry in the stub hash table. */ | |
928 | ||
929 | static struct bfd_hash_entry * | |
930 | stub_hash_newfunc (struct bfd_hash_entry *entry, | |
931 | struct bfd_hash_table *table, | |
932 | const char *string) | |
933 | { | |
934 | /* Allocate the structure if it has not already been allocated by a | |
935 | subclass. */ | |
936 | if (entry == NULL) | |
937 | { | |
938 | entry = bfd_hash_allocate (table, | |
939 | sizeof (struct elf_metag_stub_hash_entry)); | |
940 | if (entry == NULL) | |
941 | return entry; | |
942 | } | |
943 | ||
944 | /* Call the allocation method of the superclass. */ | |
945 | entry = bfd_hash_newfunc (entry, table, string); | |
946 | if (entry != NULL) | |
947 | { | |
948 | struct elf_metag_stub_hash_entry *hsh; | |
949 | ||
950 | /* Initialize the local fields. */ | |
951 | hsh = (struct elf_metag_stub_hash_entry *) entry; | |
952 | hsh->stub_sec = NULL; | |
953 | hsh->stub_offset = 0; | |
954 | hsh->target_value = 0; | |
955 | hsh->target_section = NULL; | |
956 | hsh->stub_type = metag_stub_long_branch; | |
957 | hsh->hh = NULL; | |
958 | hsh->id_sec = NULL; | |
959 | } | |
960 | ||
961 | return entry; | |
962 | } | |
963 | ||
964 | /* Initialize an entry in the link hash table. */ | |
965 | ||
966 | static struct bfd_hash_entry * | |
967 | metag_link_hash_newfunc (struct bfd_hash_entry *entry, | |
968 | struct bfd_hash_table *table, | |
969 | const char *string) | |
970 | { | |
971 | /* Allocate the structure if it has not already been allocated by a | |
972 | subclass. */ | |
973 | if (entry == NULL) | |
974 | { | |
975 | entry = bfd_hash_allocate (table, | |
976 | sizeof (struct elf_metag_link_hash_entry)); | |
977 | if (entry == NULL) | |
978 | return entry; | |
979 | } | |
980 | ||
981 | /* Call the allocation method of the superclass. */ | |
982 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
983 | if (entry != NULL) | |
984 | { | |
985 | struct elf_metag_link_hash_entry *hh; | |
986 | ||
987 | /* Initialize the local fields. */ | |
988 | hh = (struct elf_metag_link_hash_entry *) entry; | |
989 | hh->hsh_cache = NULL; | |
a3c62988 NC |
990 | hh->tls_type = GOT_UNKNOWN; |
991 | } | |
992 | ||
993 | return entry; | |
994 | } | |
995 | ||
68faa637 AM |
996 | /* Free the derived linker hash table. */ |
997 | ||
998 | static void | |
d495ab0d | 999 | elf_metag_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1000 | { |
1001 | struct elf_metag_link_hash_table *htab | |
d495ab0d | 1002 | = (struct elf_metag_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1003 | |
1004 | bfd_hash_table_free (&htab->bstab); | |
d495ab0d | 1005 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1006 | } |
1007 | ||
a3c62988 NC |
1008 | /* Create the derived linker hash table. The Meta ELF port uses the derived |
1009 | hash table to keep information specific to the Meta ELF linker (without | |
1010 | using static variables). */ | |
1011 | ||
1012 | static struct bfd_link_hash_table * | |
1013 | elf_metag_link_hash_table_create (bfd *abfd) | |
1014 | { | |
1015 | struct elf_metag_link_hash_table *htab; | |
986f0783 | 1016 | size_t amt = sizeof (*htab); |
a3c62988 | 1017 | |
7bf52ea2 | 1018 | htab = bfd_zmalloc (amt); |
a3c62988 NC |
1019 | if (htab == NULL) |
1020 | return NULL; | |
1021 | ||
1022 | if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd, | |
1023 | metag_link_hash_newfunc, | |
1024 | sizeof (struct elf_metag_link_hash_entry), | |
1025 | METAG_ELF_DATA)) | |
1026 | { | |
1027 | free (htab); | |
1028 | return NULL; | |
1029 | } | |
1030 | ||
1031 | /* Init the stub hash table too. */ | |
1032 | if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc, | |
1033 | sizeof (struct elf_metag_stub_hash_entry))) | |
d495ab0d AM |
1034 | { |
1035 | _bfd_elf_link_hash_table_free (abfd); | |
1036 | return NULL; | |
1037 | } | |
1038 | htab->etab.root.hash_table_free = elf_metag_link_hash_table_free; | |
3084d7a2 | 1039 | htab->etab.dt_pltgot_required = TRUE; |
a3c62988 | 1040 | |
a3c62988 NC |
1041 | return &htab->etab.root; |
1042 | } | |
1043 | ||
a3c62988 NC |
1044 | /* Section name for stubs is the associated section name plus this |
1045 | string. */ | |
1046 | #define STUB_SUFFIX ".stub" | |
1047 | ||
1048 | /* Build a name for an entry in the stub hash table. */ | |
1049 | ||
1050 | static char * | |
1051 | metag_stub_name (const asection *input_section, | |
1052 | const asection *sym_sec, | |
1053 | const struct elf_metag_link_hash_entry *hh, | |
1054 | const Elf_Internal_Rela *rel) | |
1055 | { | |
1056 | char *stub_name; | |
1057 | bfd_size_type len; | |
1058 | ||
1059 | if (hh) | |
1060 | { | |
1061 | len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1; | |
1062 | stub_name = bfd_malloc (len); | |
1063 | if (stub_name != NULL) | |
1064 | { | |
1065 | sprintf (stub_name, "%08x_%s+%x", | |
1066 | input_section->id & 0xffffffff, | |
1067 | hh->eh.root.root.string, | |
1068 | (int) rel->r_addend & 0xffffffff); | |
1069 | } | |
1070 | } | |
1071 | else | |
1072 | { | |
1073 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; | |
1074 | stub_name = bfd_malloc (len); | |
1075 | if (stub_name != NULL) | |
1076 | { | |
1077 | sprintf (stub_name, "%08x_%x:%x+%x", | |
1078 | input_section->id & 0xffffffff, | |
1079 | sym_sec->id & 0xffffffff, | |
1080 | (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, | |
1081 | (int) rel->r_addend & 0xffffffff); | |
1082 | } | |
1083 | } | |
1084 | return stub_name; | |
1085 | } | |
1086 | ||
1087 | /* Look up an entry in the stub hash. Stub entries are cached because | |
1088 | creating the stub name takes a bit of time. */ | |
1089 | ||
1090 | static struct elf_metag_stub_hash_entry * | |
1091 | metag_get_stub_entry (const asection *input_section, | |
1092 | const asection *sym_sec, | |
1093 | struct elf_metag_link_hash_entry *hh, | |
1094 | const Elf_Internal_Rela *rel, | |
1095 | struct elf_metag_link_hash_table *htab) | |
1096 | { | |
1097 | struct elf_metag_stub_hash_entry *hsh; | |
1098 | const asection *id_sec; | |
1099 | ||
1100 | /* If this input section is part of a group of sections sharing one | |
1101 | stub section, then use the id of the first section in the group. | |
1102 | Stub names need to include a section id, as there may well be | |
1103 | more than one stub used to reach say, printf, and we need to | |
1104 | distinguish between them. */ | |
1105 | id_sec = htab->stub_group[input_section->id].link_sec; | |
1106 | ||
1107 | if (hh != NULL && hh->hsh_cache != NULL | |
1108 | && hh->hsh_cache->hh == hh | |
1109 | && hh->hsh_cache->id_sec == id_sec) | |
1110 | { | |
1111 | hsh = hh->hsh_cache; | |
1112 | } | |
1113 | else | |
1114 | { | |
1115 | char *stub_name; | |
1116 | ||
1117 | stub_name = metag_stub_name (id_sec, sym_sec, hh, rel); | |
1118 | if (stub_name == NULL) | |
1119 | return NULL; | |
1120 | ||
1121 | hsh = metag_stub_hash_lookup (&htab->bstab, | |
1122 | stub_name, FALSE, FALSE); | |
1123 | ||
1124 | if (hh != NULL) | |
1125 | hh->hsh_cache = hsh; | |
1126 | ||
1127 | free (stub_name); | |
1128 | } | |
1129 | ||
1130 | return hsh; | |
1131 | } | |
1132 | ||
1133 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
1134 | stub entry are initialised. */ | |
1135 | ||
1136 | static struct elf_metag_stub_hash_entry * | |
1137 | metag_add_stub (const char *stub_name, | |
1138 | asection *section, | |
1139 | struct elf_metag_link_hash_table *htab) | |
1140 | { | |
1141 | asection *link_sec; | |
1142 | asection *stub_sec; | |
1143 | struct elf_metag_stub_hash_entry *hsh; | |
1144 | ||
1145 | link_sec = htab->stub_group[section->id].link_sec; | |
1146 | stub_sec = htab->stub_group[section->id].stub_sec; | |
1147 | if (stub_sec == NULL) | |
1148 | { | |
1149 | stub_sec = htab->stub_group[link_sec->id].stub_sec; | |
1150 | if (stub_sec == NULL) | |
1151 | { | |
1152 | size_t namelen; | |
1153 | bfd_size_type len; | |
1154 | char *s_name; | |
1155 | ||
1156 | namelen = strlen (link_sec->name); | |
1157 | len = namelen + sizeof (STUB_SUFFIX); | |
1158 | s_name = bfd_alloc (htab->stub_bfd, len); | |
1159 | if (s_name == NULL) | |
1160 | return NULL; | |
1161 | ||
1162 | memcpy (s_name, link_sec->name, namelen); | |
1163 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); | |
1164 | ||
1165 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); | |
1166 | if (stub_sec == NULL) | |
1167 | return NULL; | |
1168 | htab->stub_group[link_sec->id].stub_sec = stub_sec; | |
1169 | } | |
1170 | htab->stub_group[section->id].stub_sec = stub_sec; | |
1171 | } | |
1172 | ||
1173 | /* Enter this entry into the linker stub hash table. */ | |
1174 | hsh = metag_stub_hash_lookup (&htab->bstab, stub_name, | |
1175 | TRUE, FALSE); | |
1176 | if (hsh == NULL) | |
1177 | { | |
695344c0 | 1178 | /* xgettext:c-format */ |
871b3ab2 | 1179 | _bfd_error_handler (_("%pB: cannot create stub entry %s"), |
4eca0228 | 1180 | section->owner, stub_name); |
a3c62988 NC |
1181 | return NULL; |
1182 | } | |
1183 | ||
1184 | hsh->stub_sec = stub_sec; | |
1185 | hsh->stub_offset = 0; | |
1186 | hsh->id_sec = link_sec; | |
1187 | return hsh; | |
1188 | } | |
1189 | ||
1190 | /* Check a signed integer value can be represented in the given number | |
1191 | of bits. */ | |
1192 | ||
1193 | static bfd_boolean | |
1194 | within_signed_range (int value, unsigned int bits) | |
1195 | { | |
1196 | int min_val = -(1 << (bits - 1)); | |
1197 | int max_val = (1 << (bits - 1)) - 1; | |
1198 | return (value <= max_val) && (value >= min_val); | |
1199 | } | |
1200 | ||
1201 | /* Perform a relocation as part of a final link. */ | |
1202 | ||
1203 | static bfd_reloc_status_type | |
1204 | metag_final_link_relocate (reloc_howto_type *howto, | |
1205 | bfd *input_bfd, | |
1206 | asection *input_section, | |
1207 | bfd_byte *contents, | |
1208 | Elf_Internal_Rela *rel, | |
1209 | bfd_vma relocation, | |
1210 | struct elf_metag_link_hash_entry *hh, | |
1211 | struct elf_metag_link_hash_table *htab, | |
1212 | asection *sym_sec) | |
1213 | { | |
1214 | bfd_reloc_status_type r = bfd_reloc_ok; | |
1215 | bfd_byte *hit_data = contents + rel->r_offset; | |
1216 | int opcode, op_shift, op_extended, l1, l2; | |
1217 | bfd_signed_vma srel, addend = rel->r_addend; | |
1218 | struct elf_metag_stub_hash_entry *hsh = NULL; | |
1219 | bfd_vma location; | |
1220 | ||
1221 | /* Find out where we are and where we're going. */ | |
1222 | location = (rel->r_offset + | |
1223 | input_section->output_offset + | |
1224 | input_section->output_section->vma); | |
1225 | ||
1226 | switch (howto->type) | |
1227 | { | |
1228 | case R_METAG_RELBRANCH: | |
1229 | case R_METAG_RELBRANCH_PLT: | |
1230 | /* Make it a pc relative offset. */ | |
1231 | relocation -= location; | |
1232 | break; | |
1233 | case R_METAG_TLS_GD: | |
1234 | case R_METAG_TLS_IE: | |
1235 | relocation -= elf_gp (input_section->output_section->owner); | |
1236 | break; | |
1237 | default: | |
1238 | break; | |
1239 | } | |
1240 | ||
1241 | switch (howto->type) | |
1242 | { | |
1243 | case R_METAG_RELBRANCH_PLT: | |
1244 | case R_METAG_RELBRANCH: | |
1245 | opcode = bfd_get_32 (input_bfd, hit_data); | |
1246 | ||
1247 | srel = (bfd_signed_vma) relocation; | |
1248 | srel += addend; | |
1249 | ||
1250 | /* If the branch is out of reach, then redirect the | |
1251 | call to the local stub for this function. */ | |
1252 | if (srel > ((1 << (BRANCH_BITS + 1)) - 1) || | |
1253 | (srel < - (1 << (BRANCH_BITS + 1)))) | |
1254 | { | |
1255 | if (sym_sec == NULL) | |
1256 | break; | |
1257 | ||
1258 | hsh = metag_get_stub_entry (input_section, sym_sec, | |
1259 | hh, rel, htab); | |
1260 | if (hsh == NULL) | |
1261 | return bfd_reloc_undefined; | |
1262 | ||
1263 | /* Munge up the value and addend so that we call the stub | |
1264 | rather than the procedure directly. */ | |
1265 | srel = (hsh->stub_offset | |
1266 | + hsh->stub_sec->output_offset | |
1267 | + hsh->stub_sec->output_section->vma); | |
1268 | srel -= location; | |
1269 | } | |
1270 | ||
1271 | srel = srel >> 2; | |
1272 | ||
1273 | if (!within_signed_range (srel, BRANCH_BITS)) | |
1274 | { | |
1275 | if (hh && hh->eh.root.type == bfd_link_hash_undefweak) | |
1276 | srel = 0; | |
1277 | else | |
1278 | return bfd_reloc_overflow; | |
1279 | } | |
1280 | ||
1281 | opcode &= ~(0x7ffff << 5); | |
1282 | opcode |= ((srel & 0x7ffff) << 5); | |
1283 | ||
1284 | bfd_put_32 (input_bfd, opcode, hit_data); | |
1285 | break; | |
1286 | case R_METAG_GETSETOFF: | |
1287 | case R_METAG_GETSET_GOT: | |
1288 | case R_METAG_GETSET_GOTOFF: | |
1289 | opcode = bfd_get_32 (input_bfd, hit_data); | |
1290 | ||
1291 | srel = (bfd_signed_vma) relocation; | |
1292 | srel += addend; | |
1293 | ||
1294 | /* Is this a standard or extended GET/SET? */ | |
1295 | if ((opcode & 0xf0000000) == 0xa0000000) | |
1296 | { | |
1297 | /* Extended GET/SET. */ | |
1298 | l1 = opcode & 0x2; | |
1299 | l2 = opcode & 0x4; | |
1300 | op_extended = 1; | |
1301 | } | |
1302 | else | |
1303 | { | |
1304 | /* Standard GET/SET. */ | |
1305 | l1 = opcode & 0x01000000; | |
1306 | l2 = opcode & 0x04000000; | |
1307 | op_extended = 0; | |
1308 | } | |
1309 | ||
1310 | /* Calculate the width of the GET/SET and how much we need to | |
1311 | shift the result by. */ | |
1312 | if (l2) | |
1313 | if (l1) | |
1314 | op_shift = 3; | |
1315 | else | |
1316 | op_shift = 2; | |
1317 | else | |
1318 | if (l1) | |
1319 | op_shift = 1; | |
1320 | else | |
1321 | op_shift = 0; | |
1322 | ||
1323 | /* GET/SET offsets are scaled by the width of the transfer. */ | |
1324 | srel = srel >> op_shift; | |
1325 | ||
1326 | /* Extended GET/SET has signed 12 bits of offset, standard has | |
1327 | signed 6 bits. */ | |
1328 | if (op_extended) | |
1329 | { | |
1330 | if (!within_signed_range (srel, 12)) | |
1331 | { | |
1332 | if (hh && hh->eh.root.type == bfd_link_hash_undefweak) | |
1333 | srel = 0; | |
1334 | else | |
1335 | return bfd_reloc_overflow; | |
1336 | } | |
1337 | opcode &= ~(0xfff << 7); | |
1338 | opcode |= ((srel & 0xfff) << 7); | |
1339 | } | |
1340 | else | |
1341 | { | |
1342 | if (!within_signed_range (srel, 5)) | |
1343 | { | |
1344 | if (hh && hh->eh.root.type == bfd_link_hash_undefweak) | |
1345 | srel = 0; | |
1346 | else | |
1347 | return bfd_reloc_overflow; | |
1348 | } | |
1349 | opcode &= ~(0x3f << 8); | |
1350 | opcode |= ((srel & 0x3f) << 8); | |
1351 | } | |
1352 | ||
1353 | bfd_put_32 (input_bfd, opcode, hit_data); | |
1354 | break; | |
1355 | case R_METAG_TLS_GD: | |
1356 | case R_METAG_TLS_LDM: | |
1357 | opcode = bfd_get_32 (input_bfd, hit_data); | |
1358 | ||
1359 | if ((bfd_signed_vma)relocation < 0) | |
1360 | { | |
1361 | /* sign extend immediate */ | |
1362 | if ((opcode & 0xf2000001) == 0x02000000) | |
1363 | { | |
1364 | /* ADD De.e,Dx.r,#I16 */ | |
1365 | /* set SE bit */ | |
1366 | opcode |= (1 << 1); | |
1367 | } else | |
1368 | return bfd_reloc_overflow; | |
1369 | } | |
1370 | ||
1371 | bfd_put_32 (input_bfd, opcode, hit_data); | |
1372 | ||
1373 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1374 | contents, rel->r_offset, | |
1375 | relocation, rel->r_addend); | |
1376 | break; | |
1377 | default: | |
1378 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1379 | contents, rel->r_offset, | |
1380 | relocation, rel->r_addend); | |
1381 | } | |
1382 | ||
1383 | return r; | |
1384 | } | |
1385 | ||
1386 | /* This is defined because R_METAG_NONE != 0... | |
1387 | See RELOC_AGAINST_DISCARDED_SECTION for details. */ | |
1388 | #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \ | |
1389 | rel, relend, howto, contents) \ | |
1390 | { \ | |
1391 | _bfd_clear_contents (howto, input_bfd, input_section, \ | |
0930cb30 | 1392 | contents, rel->r_offset); \ |
a3c62988 | 1393 | \ |
0e1862bb | 1394 | if (bfd_link_relocatable (info) \ |
a3c62988 NC |
1395 | && (input_section->flags & SEC_DEBUGGING)) \ |
1396 | { \ | |
1397 | /* Only remove relocations in debug sections since other \ | |
1398 | sections may require relocations. */ \ | |
1399 | Elf_Internal_Shdr *rel_hdr; \ | |
1400 | \ | |
1401 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \ | |
1402 | \ | |
1403 | /* Avoid empty output section. */ \ | |
1404 | if (rel_hdr->sh_size > rel_hdr->sh_entsize) \ | |
1405 | { \ | |
1406 | rel_hdr->sh_size -= rel_hdr->sh_entsize; \ | |
1407 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); \ | |
1408 | rel_hdr->sh_size -= rel_hdr->sh_entsize; \ | |
1409 | \ | |
1410 | memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \ | |
1411 | \ | |
1412 | input_section->reloc_count--; \ | |
1413 | relend--; \ | |
1414 | rel--; \ | |
1415 | continue; \ | |
1416 | } \ | |
1417 | } \ | |
1418 | \ | |
1419 | rel->r_info = R_METAG_NONE; \ | |
1420 | rel->r_addend = 0; \ | |
1421 | continue; \ | |
1422 | } | |
1423 | ||
1424 | /* Relocate a META ELF section. | |
1425 | ||
1426 | The RELOCATE_SECTION function is called by the new ELF backend linker | |
1427 | to handle the relocations for a section. | |
1428 | ||
1429 | The relocs are always passed as Rela structures; if the section | |
1430 | actually uses Rel structures, the r_addend field will always be | |
1431 | zero. | |
1432 | ||
1433 | This function is responsible for adjusting the section contents as | |
1434 | necessary, and (if using Rela relocs and generating a relocatable | |
1435 | output file) adjusting the reloc addend as necessary. | |
1436 | ||
1437 | This function does not have to worry about setting the reloc | |
1438 | address or the reloc symbol index. | |
1439 | ||
1440 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
1441 | ||
1442 | LOCAL_SECTIONS is an array giving the section in the input file | |
1443 | corresponding to the st_shndx field of each local symbol. | |
1444 | ||
1445 | The global hash table entry for the global symbols can be found | |
1446 | via elf_sym_hashes (input_bfd). | |
1447 | ||
1448 | When generating relocatable output, this function must handle | |
1449 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is | |
1450 | going to be the section symbol corresponding to the output | |
1451 | section, which means that the addend must be adjusted | |
1452 | accordingly. */ | |
1453 | ||
1454 | static bfd_boolean | |
1455 | elf_metag_relocate_section (bfd *output_bfd, | |
1456 | struct bfd_link_info *info, | |
1457 | bfd *input_bfd, | |
1458 | asection *input_section, | |
1459 | bfd_byte *contents, | |
1460 | Elf_Internal_Rela *relocs, | |
1461 | Elf_Internal_Sym *local_syms, | |
1462 | asection **local_sections) | |
1463 | { | |
1464 | bfd_vma *local_got_offsets; | |
1465 | Elf_Internal_Shdr *symtab_hdr; | |
1466 | struct elf_link_hash_entry **eh_syms; | |
1467 | struct elf_metag_link_hash_table *htab; | |
1468 | Elf_Internal_Rela *rel; | |
1469 | Elf_Internal_Rela *relend; | |
1470 | asection *sreloc; | |
1471 | ||
1472 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
1473 | eh_syms = elf_sym_hashes (input_bfd); | |
1474 | relend = relocs + input_section->reloc_count; | |
1475 | ||
1476 | htab = metag_link_hash_table (info); | |
1477 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1478 | ||
1479 | sreloc = NULL; | |
1480 | ||
1481 | for (rel = relocs; rel < relend; rel ++) | |
1482 | { | |
1483 | reloc_howto_type *howto; | |
1484 | unsigned long r_symndx; | |
1485 | Elf_Internal_Sym *sym; | |
1486 | asection *sec; | |
1487 | struct elf_metag_link_hash_entry *hh; | |
1488 | bfd_vma relocation; | |
1489 | bfd_reloc_status_type r; | |
1490 | const char *name; | |
1491 | int r_type; | |
1492 | ||
1493 | r_type = ELF32_R_TYPE (rel->r_info); | |
1494 | ||
1495 | if (r_type == R_METAG_GNU_VTINHERIT | |
1496 | || r_type == R_METAG_GNU_VTENTRY | |
1497 | || r_type == R_METAG_NONE) | |
1498 | continue; | |
1499 | ||
1500 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1501 | ||
1502 | howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info); | |
1503 | hh = NULL; | |
1504 | sym = NULL; | |
1505 | sec = NULL; | |
1506 | ||
1507 | if (r_symndx < symtab_hdr->sh_info) | |
1508 | { | |
1509 | sym = local_syms + r_symndx; | |
1510 | sec = local_sections [r_symndx]; | |
1511 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
1512 | ||
1513 | name = bfd_elf_string_from_elf_section | |
1514 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
fd361982 | 1515 | name = name == NULL ? bfd_section_name (sec) : name; |
a3c62988 NC |
1516 | } |
1517 | else | |
1518 | { | |
1519 | struct elf_link_hash_entry *eh; | |
62d887d4 | 1520 | bfd_boolean unresolved_reloc, warned, ignored; |
a3c62988 NC |
1521 | |
1522 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
1523 | r_symndx, symtab_hdr, eh_syms, | |
1524 | eh, sec, relocation, | |
62d887d4 | 1525 | unresolved_reloc, warned, ignored); |
a3c62988 NC |
1526 | |
1527 | name = eh->root.root.string; | |
1528 | hh = (struct elf_metag_link_hash_entry *) eh; | |
1529 | } | |
1530 | ||
1531 | if (sec != NULL && discarded_section (sec)) | |
1532 | METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
1533 | rel, relend, howto, contents); | |
1534 | ||
0e1862bb | 1535 | if (bfd_link_relocatable (info)) |
a3c62988 NC |
1536 | continue; |
1537 | ||
1538 | switch (r_type) | |
1539 | { | |
1540 | case R_METAG_ADDR32: | |
1541 | case R_METAG_RELBRANCH: | |
1542 | if ((input_section->flags & SEC_ALLOC) == 0) | |
1543 | break; | |
1544 | ||
0e1862bb | 1545 | if ((bfd_link_pic (info) |
a3c62988 NC |
1546 | && r_symndx != STN_UNDEF |
1547 | && (input_section->flags & SEC_ALLOC) != 0 | |
1548 | && (r_type != R_METAG_RELBRANCH | |
1549 | || !SYMBOL_CALLS_LOCAL (info, &hh->eh))) | |
0e1862bb | 1550 | || (!bfd_link_pic (info) |
a3c62988 NC |
1551 | && hh != NULL |
1552 | && hh->eh.dynindx != -1 | |
1553 | && !hh->eh.non_got_ref | |
1554 | && ((hh->eh.def_dynamic | |
1555 | && !hh->eh.def_regular) | |
1556 | || hh->eh.root.type == bfd_link_hash_undefweak | |
1557 | || hh->eh.root.type == bfd_link_hash_undefined))) | |
1558 | { | |
1559 | Elf_Internal_Rela outrel; | |
1560 | bfd_boolean skip, relocate; | |
1561 | bfd_byte *loc; | |
1562 | ||
1563 | /* When generating a shared object, these relocations | |
1564 | are copied into the output file to be resolved at run | |
1565 | time. */ | |
1566 | ||
1567 | sreloc = elf_section_data (input_section)->sreloc; | |
1568 | BFD_ASSERT (sreloc != NULL); | |
1569 | ||
1570 | skip = FALSE; | |
1571 | relocate = FALSE; | |
1572 | ||
1573 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, | |
1574 | info, | |
1575 | input_section, | |
1576 | rel->r_offset); | |
1577 | if (outrel.r_offset == (bfd_vma) -1) | |
1578 | skip = TRUE; | |
1579 | else if (outrel.r_offset == (bfd_vma) -2) | |
1580 | skip = TRUE, relocate = TRUE; | |
1581 | outrel.r_offset += (input_section->output_section->vma | |
1582 | + input_section->output_offset); | |
1583 | ||
1584 | if (skip) | |
1585 | { | |
1586 | memset (&outrel, 0, sizeof outrel); | |
1587 | outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE); | |
1588 | } | |
1589 | else if (r_type == R_METAG_RELBRANCH) | |
1590 | { | |
1591 | BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1); | |
1592 | outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type); | |
1593 | outrel.r_addend = rel->r_addend; | |
1594 | } | |
1595 | else | |
1596 | { | |
1597 | /* h->dynindx may be -1 if this symbol was marked to | |
1598 | become local. */ | |
1599 | if (hh == NULL | |
1600 | || ((info->symbolic || hh->eh.dynindx == -1) | |
1601 | && hh->eh.def_regular)) | |
1602 | { | |
1603 | relocate = TRUE; | |
1604 | outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE); | |
1605 | outrel.r_addend = relocation + rel->r_addend; | |
1606 | } | |
1607 | else | |
1608 | { | |
1609 | BFD_ASSERT (hh->eh.dynindx != -1); | |
1610 | outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type); | |
1611 | outrel.r_addend = rel->r_addend; | |
1612 | } | |
1613 | } | |
1614 | ||
1615 | loc = sreloc->contents; | |
1616 | loc += sreloc->reloc_count * sizeof(Elf32_External_Rela); | |
1617 | bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); | |
1618 | ++sreloc->reloc_count; | |
1619 | ||
1620 | /* If this reloc is against an external symbol, we do | |
1621 | not want to fiddle with the addend. Otherwise, we | |
1622 | need to include the symbol value so that it becomes | |
1623 | an addend for the dynamic reloc. */ | |
1624 | if (! relocate) | |
1625 | continue; | |
1626 | } | |
1627 | break; | |
1628 | ||
1629 | case R_METAG_RELBRANCH_PLT: | |
1630 | /* Relocation is to the entry for this symbol in the | |
1631 | procedure linkage table. */ | |
1632 | ||
1633 | if (hh == NULL) | |
1634 | break; | |
1635 | ||
1636 | if (hh->eh.forced_local) | |
1637 | break; | |
1638 | ||
ce558b89 | 1639 | if (hh->eh.plt.offset == (bfd_vma) -1 || htab->etab.splt == NULL) |
a3c62988 NC |
1640 | { |
1641 | /* We didn't make a PLT entry for this symbol. This | |
1642 | happens when statically linking PIC code, or when | |
1643 | using -Bsymbolic. */ | |
1644 | break; | |
1645 | } | |
1646 | ||
ce558b89 AM |
1647 | relocation = (htab->etab.splt->output_section->vma |
1648 | + htab->etab.splt->output_offset | |
a3c62988 NC |
1649 | + hh->eh.plt.offset); |
1650 | break; | |
1651 | case R_METAG_HI16_GOTPC: | |
1652 | case R_METAG_LO16_GOTPC: | |
ce558b89 | 1653 | BFD_ASSERT (htab->etab.sgot != NULL); |
a3c62988 | 1654 | |
ce558b89 AM |
1655 | relocation = (htab->etab.sgot->output_section->vma + |
1656 | htab->etab.sgot->output_offset); | |
a3c62988 NC |
1657 | relocation += GOT_REG_OFFSET; |
1658 | relocation -= (input_section->output_section->vma | |
1659 | + input_section->output_offset | |
1660 | + rel->r_offset); | |
1661 | break; | |
1662 | case R_METAG_HI16_GOTOFF: | |
1663 | case R_METAG_LO16_GOTOFF: | |
1664 | case R_METAG_GETSET_GOTOFF: | |
ce558b89 | 1665 | BFD_ASSERT (htab->etab.sgot != NULL); |
a3c62988 | 1666 | |
ce558b89 AM |
1667 | relocation -= (htab->etab.sgot->output_section->vma + |
1668 | htab->etab.sgot->output_offset); | |
a3c62988 NC |
1669 | relocation -= GOT_REG_OFFSET; |
1670 | break; | |
1671 | case R_METAG_GETSET_GOT: | |
1672 | { | |
1673 | bfd_vma off; | |
1674 | bfd_boolean do_got = 0; | |
1675 | ||
1676 | /* Relocation is to the entry for this symbol in the | |
1677 | global offset table. */ | |
1678 | if (hh != NULL) | |
1679 | { | |
1680 | bfd_boolean dyn; | |
1681 | ||
1682 | off = hh->eh.got.offset; | |
1683 | dyn = htab->etab.dynamic_sections_created; | |
0e1862bb L |
1684 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
1685 | bfd_link_pic (info), | |
a3c62988 NC |
1686 | &hh->eh)) |
1687 | { | |
1688 | /* If we aren't going to call finish_dynamic_symbol, | |
1689 | then we need to handle initialisation of the .got | |
1690 | entry and create needed relocs here. Since the | |
1691 | offset must always be a multiple of 4, we use the | |
1692 | least significant bit to record whether we have | |
1693 | initialised it already. */ | |
1694 | if ((off & 1) != 0) | |
1695 | off &= ~1; | |
1696 | else | |
1697 | { | |
1698 | hh->eh.got.offset |= 1; | |
1699 | do_got = 1; | |
1700 | } | |
1701 | } | |
1702 | } | |
1703 | else | |
1704 | { | |
1705 | /* Local symbol case. */ | |
1706 | if (local_got_offsets == NULL) | |
1707 | abort (); | |
1708 | ||
1709 | off = local_got_offsets[r_symndx]; | |
1710 | ||
1711 | /* The offset must always be a multiple of 4. We use | |
1712 | the least significant bit to record whether we have | |
1713 | already generated the necessary reloc. */ | |
1714 | if ((off & 1) != 0) | |
1715 | off &= ~1; | |
1716 | else | |
1717 | { | |
1718 | local_got_offsets[r_symndx] |= 1; | |
1719 | do_got = 1; | |
1720 | } | |
1721 | } | |
1722 | ||
1723 | if (do_got) | |
1724 | { | |
0e1862bb | 1725 | if (bfd_link_pic (info)) |
a3c62988 NC |
1726 | { |
1727 | /* Output a dynamic relocation for this GOT entry. | |
1728 | In this case it is relative to the base of the | |
1729 | object because the symbol index is zero. */ | |
1730 | Elf_Internal_Rela outrel; | |
1731 | bfd_byte *loc; | |
ce558b89 | 1732 | asection *s = htab->etab.srelgot; |
a3c62988 NC |
1733 | |
1734 | outrel.r_offset = (off | |
ce558b89 AM |
1735 | + htab->etab.sgot->output_offset |
1736 | + htab->etab.sgot->output_section->vma); | |
a3c62988 NC |
1737 | outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE); |
1738 | outrel.r_addend = relocation; | |
1739 | loc = s->contents; | |
1740 | loc += s->reloc_count++ * sizeof (Elf32_External_Rela); | |
1741 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
1742 | } | |
1743 | else | |
1744 | bfd_put_32 (output_bfd, relocation, | |
ce558b89 | 1745 | htab->etab.sgot->contents + off); |
a3c62988 NC |
1746 | } |
1747 | ||
1748 | if (off >= (bfd_vma) -2) | |
1749 | abort (); | |
1750 | ||
1751 | relocation = off - GOT_REG_OFFSET; | |
1752 | } | |
1753 | break; | |
1754 | case R_METAG_TLS_GD: | |
1755 | case R_METAG_TLS_IE: | |
1756 | { | |
1757 | /* XXXMJF There is room here for optimisations. For example | |
1758 | converting from GD->IE, etc. */ | |
1759 | bfd_vma off; | |
1760 | int indx; | |
1761 | char tls_type; | |
1762 | ||
ce558b89 | 1763 | if (htab->etab.sgot == NULL) |
a3c62988 NC |
1764 | abort(); |
1765 | ||
1766 | indx = 0; | |
1767 | if (hh != NULL) | |
1768 | { | |
1769 | bfd_boolean dyn; | |
1770 | dyn = htab->etab.dynamic_sections_created; | |
1771 | ||
0e1862bb L |
1772 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
1773 | bfd_link_pic (info), | |
1774 | &hh->eh) | |
1775 | && (!bfd_link_pic (info) | |
a3c62988 NC |
1776 | || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh))) |
1777 | { | |
1778 | indx = hh->eh.dynindx; | |
1779 | } | |
1780 | off = hh->eh.got.offset; | |
1781 | tls_type = hh->tls_type; | |
1782 | } | |
1783 | else | |
1784 | { | |
1785 | /* Local symbol case. */ | |
1786 | if (local_got_offsets == NULL) | |
1787 | abort (); | |
1788 | ||
1789 | off = local_got_offsets[r_symndx]; | |
1790 | tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx]; | |
1791 | } | |
1792 | ||
1793 | if (tls_type == GOT_UNKNOWN) | |
6ec49e7c | 1794 | abort (); |
a3c62988 NC |
1795 | |
1796 | if ((off & 1) != 0) | |
1797 | off &= ~1; | |
1798 | else | |
1799 | { | |
1800 | bfd_boolean need_relocs = FALSE; | |
1801 | Elf_Internal_Rela outrel; | |
1802 | bfd_byte *loc = NULL; | |
1803 | int cur_off = off; | |
1804 | ||
1805 | /* The GOT entries have not been initialized yet. Do it | |
1806 | now, and emit any relocations. If both an IE GOT and a | |
1807 | GD GOT are necessary, we emit the GD first. */ | |
1808 | ||
0e1862bb | 1809 | if ((bfd_link_pic (info) || indx != 0) |
a3c62988 NC |
1810 | && (hh == NULL |
1811 | || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT | |
1812 | || hh->eh.root.type != bfd_link_hash_undefweak)) | |
1813 | { | |
1814 | need_relocs = TRUE; | |
ce558b89 | 1815 | loc = htab->etab.srelgot->contents; |
a3c62988 | 1816 | /* FIXME (CAO): Should this be reloc_count++ ? */ |
ce558b89 | 1817 | loc += htab->etab.srelgot->reloc_count * sizeof (Elf32_External_Rela); |
a3c62988 NC |
1818 | } |
1819 | ||
1820 | if (tls_type & GOT_TLS_GD) | |
1821 | { | |
1822 | if (need_relocs) | |
1823 | { | |
1824 | outrel.r_offset = (cur_off | |
ce558b89 AM |
1825 | + htab->etab.sgot->output_section->vma |
1826 | + htab->etab.sgot->output_offset); | |
a3c62988 NC |
1827 | outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD); |
1828 | outrel.r_addend = 0; | |
ce558b89 | 1829 | bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + cur_off); |
a3c62988 NC |
1830 | |
1831 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
ce558b89 | 1832 | htab->etab.srelgot->reloc_count++; |
a3c62988 NC |
1833 | loc += sizeof (Elf32_External_Rela); |
1834 | ||
1835 | if (indx == 0) | |
1836 | bfd_put_32 (output_bfd, 0, | |
ce558b89 | 1837 | htab->etab.sgot->contents + cur_off + 4); |
a3c62988 NC |
1838 | else |
1839 | { | |
1840 | bfd_put_32 (output_bfd, 0, | |
ce558b89 | 1841 | htab->etab.sgot->contents + cur_off + 4); |
a3c62988 NC |
1842 | outrel.r_info = ELF32_R_INFO (indx, |
1843 | R_METAG_TLS_DTPOFF); | |
1844 | outrel.r_offset += 4; | |
1845 | bfd_elf32_swap_reloca_out (output_bfd, | |
1846 | &outrel, loc); | |
ce558b89 | 1847 | htab->etab.srelgot->reloc_count++; |
a3c62988 NC |
1848 | loc += sizeof (Elf32_External_Rela); |
1849 | } | |
1850 | } | |
1851 | else | |
1852 | { | |
1853 | /* We don't support changing the TLS model. */ | |
6ec49e7c NC |
1854 | /* PR 20675 */ |
1855 | if (bfd_link_pic (info)) | |
871b3ab2 | 1856 | _bfd_error_handler (_("%pB(%pA): multiple TLS models are not supported"), |
d42c267e | 1857 | input_bfd, input_section); |
6ec49e7c | 1858 | else |
871b3ab2 | 1859 | _bfd_error_handler (_("%pB(%pA): shared library symbol %s encountered whilst performing a static link"), |
6ec49e7c NC |
1860 | input_bfd, input_section, name); |
1861 | return FALSE; | |
a3c62988 NC |
1862 | } |
1863 | ||
1864 | cur_off += 8; | |
1865 | } | |
1866 | ||
1867 | if (tls_type & GOT_TLS_IE) | |
1868 | { | |
1869 | if (need_relocs) | |
1870 | { | |
1871 | outrel.r_offset = (cur_off | |
ce558b89 AM |
1872 | + htab->etab.sgot->output_section->vma |
1873 | + htab->etab.sgot->output_offset); | |
a3c62988 NC |
1874 | outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF); |
1875 | ||
1876 | if (indx == 0) | |
1877 | outrel.r_addend = relocation - dtpoff_base (info); | |
1878 | else | |
1879 | outrel.r_addend = 0; | |
1880 | ||
1881 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
ce558b89 | 1882 | htab->etab.srelgot->reloc_count++; |
a3c62988 NC |
1883 | loc += sizeof (Elf32_External_Rela); |
1884 | } | |
1885 | else | |
1886 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
ce558b89 | 1887 | htab->etab.sgot->contents + cur_off); |
a3c62988 NC |
1888 | |
1889 | cur_off += 4; | |
1890 | } | |
1891 | ||
1892 | if (hh != NULL) | |
1893 | hh->eh.got.offset |= 1; | |
1894 | else | |
1895 | local_got_offsets[r_symndx] |= 1; | |
1896 | } | |
1897 | ||
1898 | /* Add the base of the GOT to the relocation value. */ | |
1899 | relocation = off - GOT_REG_OFFSET; | |
1900 | ||
1901 | break; | |
1902 | } | |
1903 | ||
1904 | case R_METAG_TLS_IENONPIC_HI16: | |
1905 | case R_METAG_TLS_IENONPIC_LO16: | |
1906 | case R_METAG_TLS_LE_HI16: | |
1907 | case R_METAG_TLS_LE_LO16: | |
0e1862bb | 1908 | if (bfd_link_pic (info)) |
a3c62988 | 1909 | { |
4eca0228 | 1910 | _bfd_error_handler |
695344c0 | 1911 | /* xgettext:c-format */ |
2dcf00ce AM |
1912 | (_("%pB(%pA+%#" PRIx64 "): " |
1913 | "%s relocation not permitted in shared object"), | |
1914 | input_bfd, input_section, (uint64_t) rel->r_offset, | |
1915 | howto->name); | |
a3c62988 NC |
1916 | return FALSE; |
1917 | } | |
1918 | else | |
1919 | relocation = tpoff (info, relocation); | |
1920 | break; | |
1921 | case R_METAG_TLS_LDO_HI16: | |
1922 | case R_METAG_TLS_LDO_LO16: | |
0e1862bb | 1923 | if (! bfd_link_pic (info)) |
a3c62988 NC |
1924 | relocation = tpoff (info, relocation); |
1925 | else | |
1926 | relocation -= dtpoff_base (info); | |
1927 | break; | |
1928 | case R_METAG_TLS_LDM: | |
1929 | { | |
1930 | bfd_vma off; | |
1931 | ||
ce558b89 | 1932 | if (htab->etab.sgot == NULL) |
a3c62988 NC |
1933 | abort(); |
1934 | off = htab->tls_ldm_got.offset; | |
1935 | if (off & 1) | |
1936 | off &= ~1; | |
1937 | else | |
1938 | { | |
1939 | Elf_Internal_Rela outrel; | |
1940 | bfd_byte *loc; | |
1941 | ||
1942 | outrel.r_offset = (off | |
ce558b89 AM |
1943 | + htab->etab.sgot->output_section->vma |
1944 | + htab->etab.sgot->output_offset); | |
a3c62988 NC |
1945 | |
1946 | outrel.r_addend = 0; | |
1947 | outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD); | |
ce558b89 AM |
1948 | loc = htab->etab.srelgot->contents; |
1949 | loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
a3c62988 NC |
1950 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
1951 | htab->tls_ldm_got.offset |= 1; | |
1952 | } | |
1953 | ||
1954 | relocation = off - GOT_REG_OFFSET; | |
1955 | break; | |
1956 | } | |
1957 | default: | |
1958 | break; | |
1959 | } | |
1960 | ||
1961 | r = metag_final_link_relocate (howto, input_bfd, input_section, | |
1962 | contents, rel, relocation, hh, htab, | |
1963 | sec); | |
1964 | ||
1965 | if (r != bfd_reloc_ok) | |
1966 | { | |
1967 | const char * msg = (const char *) NULL; | |
1968 | ||
1969 | switch (r) | |
1970 | { | |
1971 | case bfd_reloc_overflow: | |
1a72702b | 1972 | (*info->callbacks->reloc_overflow) |
a3c62988 NC |
1973 | (info, (hh ? &hh->eh.root : NULL), name, howto->name, |
1974 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
1975 | break; | |
1976 | ||
1977 | case bfd_reloc_undefined: | |
1a72702b AM |
1978 | (*info->callbacks->undefined_symbol) |
1979 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
a3c62988 NC |
1980 | break; |
1981 | ||
1982 | case bfd_reloc_outofrange: | |
1983 | msg = _("internal error: out of range error"); | |
1984 | break; | |
1985 | ||
1986 | case bfd_reloc_notsupported: | |
1987 | msg = _("internal error: unsupported relocation error"); | |
1988 | break; | |
1989 | ||
1990 | case bfd_reloc_dangerous: | |
1991 | msg = _("internal error: dangerous relocation"); | |
1992 | break; | |
1993 | ||
1994 | default: | |
1995 | msg = _("internal error: unknown error"); | |
1996 | break; | |
1997 | } | |
1998 | ||
1999 | if (msg) | |
1a72702b AM |
2000 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
2001 | input_section, rel->r_offset); | |
a3c62988 NC |
2002 | } |
2003 | } | |
2004 | ||
2005 | return TRUE; | |
2006 | } | |
2007 | ||
2008 | /* Create the .plt and .got sections, and set up our hash table | |
2009 | short-cuts to various dynamic sections. */ | |
2010 | ||
2011 | static bfd_boolean | |
2012 | elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) | |
2013 | { | |
2014 | struct elf_metag_link_hash_table *htab; | |
2015 | struct elf_link_hash_entry *eh; | |
2016 | struct bfd_link_hash_entry *bh; | |
2017 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2018 | ||
2019 | /* Don't try to create the .plt and .got twice. */ | |
2020 | htab = metag_link_hash_table (info); | |
ce558b89 | 2021 | if (htab->etab.splt != NULL) |
a3c62988 NC |
2022 | return TRUE; |
2023 | ||
2024 | /* Call the generic code to do most of the work. */ | |
2025 | if (! _bfd_elf_create_dynamic_sections (abfd, info)) | |
2026 | return FALSE; | |
2027 | ||
ce558b89 AM |
2028 | /* The header goes at the start of the dynamic .got section, which |
2029 | is placed after the dynamic .got.plt section. ie. The header is | |
2030 | not necessarily at the start of the output .got section. */ | |
2031 | htab->etab.sgot->size += 12; | |
a3c62988 | 2032 | |
ce558b89 | 2033 | /* Define the symbol __GLOBAL_OFFSET_TABLE__ on the header. */ |
a3c62988 NC |
2034 | bh = NULL; |
2035 | if (!(_bfd_generic_link_add_one_symbol | |
ce558b89 | 2036 | (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->etab.sgot, |
a3c62988 NC |
2037 | (bfd_vma) 0, NULL, FALSE, bed->collect, &bh))) |
2038 | return FALSE; | |
2039 | eh = (struct elf_link_hash_entry *) bh; | |
2040 | eh->def_regular = 1; | |
2041 | eh->type = STT_OBJECT; | |
2042 | eh->other = STV_HIDDEN; | |
2043 | ||
0e1862bb | 2044 | if (! bfd_link_executable (info) |
a3c62988 NC |
2045 | && ! bfd_elf_link_record_dynamic_symbol (info, eh)) |
2046 | return FALSE; | |
2047 | ||
ce558b89 | 2048 | htab->etab.hgot = eh; |
a3c62988 | 2049 | |
a3c62988 NC |
2050 | return TRUE; |
2051 | } | |
2052 | ||
2053 | /* Look through the relocs for a section during the first phase, and | |
2054 | calculate needed space in the global offset table, procedure linkage | |
2055 | table, and dynamic reloc sections. At this point we haven't | |
2056 | necessarily read all the input files. */ | |
2057 | ||
2058 | static bfd_boolean | |
2059 | elf_metag_check_relocs (bfd *abfd, | |
2060 | struct bfd_link_info *info, | |
2061 | asection *sec, | |
2062 | const Elf_Internal_Rela *relocs) | |
2063 | { | |
2064 | Elf_Internal_Shdr *symtab_hdr; | |
2065 | struct elf_link_hash_entry **eh_syms; | |
2066 | const Elf_Internal_Rela *rel; | |
2067 | const Elf_Internal_Rela *rel_end; | |
2068 | struct elf_metag_link_hash_table *htab; | |
2069 | asection *sreloc; | |
2070 | bfd *dynobj; | |
2071 | int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN; | |
2072 | ||
0e1862bb | 2073 | if (bfd_link_relocatable (info)) |
a3c62988 NC |
2074 | return TRUE; |
2075 | ||
2076 | htab = metag_link_hash_table (info); | |
2077 | dynobj = htab->etab.dynobj; | |
2078 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2079 | eh_syms = elf_sym_hashes (abfd); | |
2080 | sreloc = NULL; | |
2081 | ||
2082 | if (htab == NULL) | |
2083 | return FALSE; | |
2084 | ||
2085 | rel_end = relocs + sec->reloc_count; | |
2086 | for (rel = relocs; rel < rel_end; rel++) | |
2087 | { | |
2088 | int r_type; | |
2089 | struct elf_metag_link_hash_entry *hh; | |
1a18f0ae | 2090 | Elf_Internal_Sym *isym; |
a3c62988 NC |
2091 | unsigned long r_symndx; |
2092 | ||
2093 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2094 | r_type = ELF32_R_TYPE (rel->r_info); | |
2095 | if (r_symndx < symtab_hdr->sh_info) | |
1a18f0ae NC |
2096 | { |
2097 | /* A local symbol. */ | |
f1dfbfdb | 2098 | isym = bfd_sym_from_r_symndx (&htab->etab.sym_cache, |
1a18f0ae NC |
2099 | abfd, r_symndx); |
2100 | if (isym == NULL) | |
2101 | return FALSE; | |
2102 | ||
2103 | hh = NULL; | |
2104 | } | |
a3c62988 NC |
2105 | else |
2106 | { | |
1a18f0ae NC |
2107 | isym = NULL; |
2108 | ||
a3c62988 NC |
2109 | hh = (struct elf_metag_link_hash_entry *) |
2110 | eh_syms[r_symndx - symtab_hdr->sh_info]; | |
2111 | while (hh->eh.root.type == bfd_link_hash_indirect | |
2112 | || hh->eh.root.type == bfd_link_hash_warning) | |
2113 | hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link; | |
2114 | } | |
2115 | ||
2116 | /* Some relocs require a global offset table. */ | |
ce558b89 | 2117 | if (htab->etab.sgot == NULL) |
a3c62988 NC |
2118 | { |
2119 | switch (r_type) | |
2120 | { | |
2121 | case R_METAG_TLS_GD: | |
2122 | case R_METAG_TLS_LDM: | |
2123 | case R_METAG_TLS_IE: | |
0e1862bb | 2124 | if (bfd_link_pic (info)) |
a3c62988 NC |
2125 | info->flags |= DF_STATIC_TLS; |
2126 | /* Fall through. */ | |
2127 | ||
2128 | case R_METAG_HI16_GOTOFF: | |
2129 | case R_METAG_LO16_GOTOFF: | |
2130 | case R_METAG_GETSET_GOTOFF: | |
2131 | case R_METAG_GETSET_GOT: | |
2132 | case R_METAG_HI16_GOTPC: | |
2133 | case R_METAG_LO16_GOTPC: | |
2134 | if (dynobj == NULL) | |
2135 | htab->etab.dynobj = dynobj = abfd; | |
2136 | if (!elf_metag_create_dynamic_sections (dynobj, info)) | |
2137 | return FALSE; | |
2138 | break; | |
2139 | ||
2140 | default: | |
2141 | break; | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | switch (r_type) | |
2146 | { | |
2147 | case R_METAG_TLS_IE: | |
2148 | case R_METAG_TLS_GD: | |
2149 | case R_METAG_GETSET_GOT: | |
2150 | switch (r_type) | |
2151 | { | |
2152 | default: | |
2153 | tls_type = GOT_NORMAL; | |
2154 | break; | |
2155 | case R_METAG_TLS_IE: | |
2156 | tls_type = GOT_TLS_IE; | |
2157 | break; | |
2158 | case R_METAG_TLS_GD: | |
2159 | tls_type = GOT_TLS_GD; | |
2160 | break; | |
2161 | } | |
2162 | ||
2163 | if (hh != NULL) | |
2164 | { | |
2165 | hh->eh.got.refcount += 1; | |
2166 | old_tls_type = hh->tls_type; | |
2167 | } | |
2168 | else | |
2169 | { | |
2170 | bfd_signed_vma *local_got_refcounts; | |
2171 | ||
2172 | /* This is a global offset table entry for a local | |
2173 | symbol. */ | |
2174 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2175 | if (local_got_refcounts == NULL) | |
2176 | { | |
2177 | bfd_size_type size; | |
2178 | ||
2179 | size = symtab_hdr->sh_info; | |
2180 | size *= sizeof (bfd_signed_vma); | |
2181 | /* Add in space to store the local GOT TLS types. */ | |
2182 | size += symtab_hdr->sh_info; | |
2183 | local_got_refcounts = ((bfd_signed_vma *) | |
2184 | bfd_zalloc (abfd, size)); | |
2185 | if (local_got_refcounts == NULL) | |
2186 | return FALSE; | |
2187 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
2188 | memset (metag_elf_local_got_tls_type (abfd), | |
2189 | GOT_UNKNOWN, symtab_hdr->sh_info); | |
2190 | } | |
2191 | local_got_refcounts[r_symndx] += 1; | |
2192 | old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx]; | |
2193 | } | |
2194 | ||
2195 | if (old_tls_type != tls_type) | |
2196 | { | |
2197 | if (hh != NULL) | |
2198 | { | |
2199 | hh->tls_type = tls_type; | |
2200 | } | |
2201 | else | |
2202 | { | |
2203 | metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
2204 | } | |
2205 | } | |
2206 | ||
2207 | break; | |
2208 | ||
2209 | case R_METAG_TLS_LDM: | |
2210 | metag_link_hash_table (info)->tls_ldm_got.refcount += 1; | |
2211 | break; | |
2212 | ||
2213 | case R_METAG_RELBRANCH_PLT: | |
2214 | /* This symbol requires a procedure linkage table entry. We | |
2215 | actually build the entry in adjust_dynamic_symbol, | |
2216 | because this might be a case of linking PIC code without | |
2217 | linking in any dynamic objects, in which case we don't | |
2218 | need to generate a procedure linkage table after all. */ | |
2219 | ||
2220 | /* If this is a local symbol, we resolve it directly without | |
2221 | creating a procedure linkage table entry. */ | |
2222 | if (hh == NULL) | |
2223 | continue; | |
2224 | ||
2225 | if (hh->eh.forced_local) | |
2226 | break; | |
2227 | ||
2228 | hh->eh.needs_plt = 1; | |
2229 | hh->eh.plt.refcount += 1; | |
2230 | break; | |
2231 | ||
a3c62988 NC |
2232 | case R_METAG_HIADDR16: |
2233 | case R_METAG_LOADDR16: | |
1a18f0ae NC |
2234 | /* Let's help debug shared library creation. These relocs |
2235 | cannot be used in shared libs. Don't error out for | |
2236 | sections we don't care about, such as debug sections or | |
2237 | non-constant sections. */ | |
0e1862bb | 2238 | if (bfd_link_pic (info) |
1a18f0ae NC |
2239 | && (sec->flags & SEC_ALLOC) != 0 |
2240 | && (sec->flags & SEC_READONLY) != 0) | |
2241 | { | |
2242 | const char *name; | |
2243 | ||
2244 | if (hh) | |
2245 | name = hh->eh.root.root.string; | |
2246 | else | |
2247 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
4eca0228 | 2248 | _bfd_error_handler |
695344c0 | 2249 | /* xgettext:c-format */ |
871b3ab2 | 2250 | (_("%pB: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1a18f0ae NC |
2251 | abfd, elf_metag_howto_table[r_type].name, name); |
2252 | bfd_set_error (bfd_error_bad_value); | |
2253 | return FALSE; | |
2254 | } | |
2255 | ||
2256 | /* Fall through. */ | |
2257 | case R_METAG_ADDR32: | |
a3c62988 NC |
2258 | case R_METAG_RELBRANCH: |
2259 | case R_METAG_GETSETOFF: | |
0e1862bb | 2260 | if (hh != NULL && !bfd_link_pic (info)) |
a3c62988 NC |
2261 | { |
2262 | hh->eh.non_got_ref = 1; | |
2263 | hh->eh.plt.refcount += 1; | |
2264 | } | |
2265 | ||
2266 | /* If we are creating a shared library, and this is a reloc | |
2267 | against a global symbol, or a non PC relative reloc | |
2268 | against a local symbol, then we need to copy the reloc | |
2269 | into the shared library. However, if we are linking with | |
2270 | -Bsymbolic, we do not need to copy a reloc against a | |
2271 | global symbol which is defined in an object we are | |
2272 | including in the link (i.e., DEF_REGULAR is set). At | |
2273 | this point we have not seen all the input files, so it is | |
2274 | possible that DEF_REGULAR is not set now but will be set | |
2275 | later (it is never cleared). We account for that | |
2276 | possibility below by storing information in the | |
2277 | dyn_relocs field of the hash table entry. A similar | |
2278 | situation occurs when creating shared libraries and symbol | |
2279 | visibility changes render the symbol local. | |
2280 | ||
2281 | If on the other hand, we are creating an executable, we | |
2282 | may need to keep relocations for symbols satisfied by a | |
2283 | dynamic library if we manage to avoid copy relocs for the | |
2284 | symbol. */ | |
0e1862bb | 2285 | if ((bfd_link_pic (info) |
a3c62988 NC |
2286 | && (sec->flags & SEC_ALLOC) != 0 |
2287 | && (r_type != R_METAG_RELBRANCH | |
2288 | || (hh != NULL | |
2289 | && (! info->symbolic | |
2290 | || hh->eh.root.type == bfd_link_hash_defweak | |
2291 | || !hh->eh.def_regular)))) | |
0e1862bb | 2292 | || (!bfd_link_pic (info) |
a3c62988 NC |
2293 | && (sec->flags & SEC_ALLOC) != 0 |
2294 | && hh != NULL | |
2295 | && (hh->eh.root.type == bfd_link_hash_defweak | |
2296 | || !hh->eh.def_regular))) | |
2297 | { | |
3bf083ed AM |
2298 | struct elf_dyn_relocs *hdh_p; |
2299 | struct elf_dyn_relocs **hdh_head; | |
a3c62988 NC |
2300 | |
2301 | if (dynobj == NULL) | |
2302 | htab->etab.dynobj = dynobj = abfd; | |
2303 | ||
2304 | /* When creating a shared object, we must copy these | |
2305 | relocs into the output file. We create a reloc | |
2306 | section in dynobj and make room for the reloc. */ | |
2307 | if (sreloc == NULL) | |
2308 | { | |
2309 | sreloc = _bfd_elf_make_dynamic_reloc_section | |
2310 | (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE); | |
2311 | ||
2312 | if (sreloc == NULL) | |
2313 | { | |
2314 | bfd_set_error (bfd_error_bad_value); | |
2315 | return FALSE; | |
2316 | } | |
2317 | ||
2318 | elf_section_data (sec)->sreloc = sreloc; | |
2319 | } | |
2320 | ||
2321 | /* If this is a global symbol, we count the number of | |
2322 | relocations we need for this symbol. */ | |
2323 | if (hh != NULL) | |
190eb1dd | 2324 | hdh_head = &hh->eh.dyn_relocs; |
a3c62988 NC |
2325 | else |
2326 | { | |
2327 | /* Track dynamic relocs needed for local syms too. */ | |
2328 | asection *sr; | |
2329 | void *vpp; | |
a3c62988 NC |
2330 | |
2331 | sr = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
2332 | if (sr == NULL) | |
2333 | sr = sec; | |
2334 | ||
2335 | vpp = &elf_section_data (sr)->local_dynrel; | |
3bf083ed | 2336 | hdh_head = (struct elf_dyn_relocs **) vpp; |
a3c62988 NC |
2337 | } |
2338 | ||
2339 | hdh_p = *hdh_head; | |
2340 | if (hdh_p == NULL || hdh_p->sec != sec) | |
2341 | { | |
3bf083ed | 2342 | hdh_p = ((struct elf_dyn_relocs *) |
a3c62988 NC |
2343 | bfd_alloc (dynobj, sizeof *hdh_p)); |
2344 | if (hdh_p == NULL) | |
2345 | return FALSE; | |
3bf083ed | 2346 | hdh_p->next = *hdh_head; |
a3c62988 NC |
2347 | *hdh_head = hdh_p; |
2348 | hdh_p->sec = sec; | |
2349 | hdh_p->count = 0; | |
3bf083ed | 2350 | hdh_p->pc_count = 0; |
a3c62988 NC |
2351 | } |
2352 | ||
2353 | hdh_p->count += 1; | |
2354 | if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH) | |
3bf083ed | 2355 | hdh_p->pc_count += 1; |
a3c62988 NC |
2356 | } |
2357 | break; | |
2358 | ||
2359 | /* This relocation describes the C++ object vtable hierarchy. | |
2360 | Reconstruct it for later use during GC. */ | |
2361 | case R_METAG_GNU_VTINHERIT: | |
2362 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh, | |
2363 | rel->r_offset)) | |
2364 | return FALSE; | |
2365 | break; | |
2366 | ||
2367 | /* This relocation describes which C++ vtable entries are actually | |
2368 | used. Record for later use during GC. */ | |
2369 | case R_METAG_GNU_VTENTRY: | |
a0ea3a14 | 2370 | if (!bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend)) |
a3c62988 NC |
2371 | return FALSE; |
2372 | break; | |
2373 | } | |
2374 | } | |
2375 | ||
2376 | return TRUE; | |
2377 | } | |
2378 | ||
2379 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
2380 | ||
2381 | static void | |
2382 | elf_metag_copy_indirect_symbol (struct bfd_link_info *info, | |
2383 | struct elf_link_hash_entry *eh_dir, | |
2384 | struct elf_link_hash_entry *eh_ind) | |
2385 | { | |
2386 | struct elf_metag_link_hash_entry *hh_dir, *hh_ind; | |
2387 | ||
2388 | hh_dir = metag_elf_hash_entry (eh_dir); | |
2389 | hh_ind = metag_elf_hash_entry (eh_ind); | |
2390 | ||
a3c62988 NC |
2391 | if (eh_ind->root.type == bfd_link_hash_indirect |
2392 | && eh_dir->got.refcount <= 0) | |
2393 | { | |
2394 | hh_dir->tls_type = hh_ind->tls_type; | |
2395 | hh_ind->tls_type = GOT_UNKNOWN; | |
2396 | } | |
2397 | ||
2398 | _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind); | |
2399 | } | |
2400 | ||
2401 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2402 | regular object. The current definition is in some section of the | |
2403 | dynamic object, but we're not including those sections. We have to | |
2404 | change the definition to something the rest of the link can | |
2405 | understand. */ | |
2406 | ||
2407 | static bfd_boolean | |
2408 | elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info, | |
2409 | struct elf_link_hash_entry *eh) | |
2410 | { | |
2411 | struct elf_metag_link_hash_table *htab; | |
5474d94f | 2412 | asection *s, *srel; |
a3c62988 NC |
2413 | |
2414 | /* If this is a function, put it in the procedure linkage table. We | |
2415 | will fill in the contents of the procedure linkage table later, | |
2416 | when we know the address of the .got section. */ | |
2417 | if (eh->type == STT_FUNC | |
2418 | || eh->needs_plt) | |
2419 | { | |
2420 | if (eh->plt.refcount <= 0 | |
2421 | || SYMBOL_CALLS_LOCAL (info, eh) | |
2422 | || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT | |
2423 | && eh->root.type == bfd_link_hash_undefweak)) | |
2424 | { | |
2425 | /* This case can occur if we saw a PLT reloc in an input | |
2426 | file, but the symbol was never referred to by a dynamic | |
2427 | object. In such a case, we don't actually need to build | |
2428 | a procedure linkage table, and we can just do a PCREL | |
2429 | reloc instead. */ | |
2430 | eh->plt.offset = (bfd_vma) -1; | |
2431 | eh->needs_plt = 0; | |
2432 | } | |
2433 | ||
2434 | return TRUE; | |
2435 | } | |
2436 | else | |
2437 | eh->plt.offset = (bfd_vma) -1; | |
2438 | ||
2439 | /* If this is a weak symbol, and there is a real definition, the | |
2440 | processor independent code will have arranged for us to see the | |
2441 | real definition first, and we can just use the same value. */ | |
60d67dc8 | 2442 | if (eh->is_weakalias) |
a3c62988 | 2443 | { |
60d67dc8 AM |
2444 | struct elf_link_hash_entry *def = weakdef (eh); |
2445 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
2446 | eh->root.u.def.section = def->root.u.def.section; | |
2447 | eh->root.u.def.value = def->root.u.def.value; | |
2448 | eh->non_got_ref = def->non_got_ref; | |
a3c62988 NC |
2449 | return TRUE; |
2450 | } | |
2451 | ||
2452 | /* This is a reference to a symbol defined by a dynamic object which | |
2453 | is not a function. */ | |
2454 | ||
2455 | /* If we are creating a shared library, we must presume that the | |
2456 | only references to the symbol are via the global offset table. | |
2457 | For such cases we need not do anything here; the relocations will | |
2458 | be handled correctly by relocate_section. */ | |
0e1862bb | 2459 | if (bfd_link_pic (info)) |
a3c62988 NC |
2460 | return TRUE; |
2461 | ||
2462 | /* If there are no references to this symbol that do not use the | |
2463 | GOT, we don't need to generate a copy reloc. */ | |
2464 | if (!eh->non_got_ref) | |
2465 | return TRUE; | |
2466 | ||
2467 | /* If -z nocopyreloc was given, we won't generate them either. */ | |
2468 | if (info->nocopyreloc) | |
2469 | { | |
2470 | eh->non_got_ref = 0; | |
2471 | return TRUE; | |
2472 | } | |
2473 | ||
3bf083ed | 2474 | /* If we don't find any dynamic relocs in read-only sections, then |
a3c62988 | 2475 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
5dbc8b37 | 2476 | if (!_bfd_elf_readonly_dynrelocs (eh)) |
a3c62988 NC |
2477 | { |
2478 | eh->non_got_ref = 0; | |
2479 | return TRUE; | |
2480 | } | |
2481 | ||
a3c62988 NC |
2482 | /* We must allocate the symbol in our .dynbss section, which will |
2483 | become part of the .bss section of the executable. There will be | |
2484 | an entry for this symbol in the .dynsym section. The dynamic | |
2485 | object will contain position independent code, so all references | |
2486 | from the dynamic object to this symbol will go through the global | |
2487 | offset table. The dynamic linker will use the .dynsym entry to | |
2488 | determine the address it must put in the global offset table, so | |
2489 | both the dynamic object and the regular object will refer to the | |
2490 | same memory location for the variable. */ | |
2491 | ||
2492 | htab = metag_link_hash_table (info); | |
2493 | ||
2494 | /* We must generate a COPY reloc to tell the dynamic linker to | |
2495 | copy the initial value out of the dynamic object and into the | |
2496 | runtime process image. */ | |
5474d94f AM |
2497 | if ((eh->root.u.def.section->flags & SEC_READONLY) != 0) |
2498 | { | |
2499 | s = htab->etab.sdynrelro; | |
2500 | srel = htab->etab.sreldynrelro; | |
2501 | } | |
2502 | else | |
2503 | { | |
2504 | s = htab->etab.sdynbss; | |
2505 | srel = htab->etab.srelbss; | |
2506 | } | |
34c67f14 | 2507 | if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0) |
a3c62988 | 2508 | { |
5474d94f | 2509 | srel->size += sizeof (Elf32_External_Rela); |
a3c62988 NC |
2510 | eh->needs_copy = 1; |
2511 | } | |
2512 | ||
6cabe1ea | 2513 | return _bfd_elf_adjust_dynamic_copy (info, eh, s); |
a3c62988 NC |
2514 | } |
2515 | ||
2516 | /* Allocate space in .plt, .got and associated reloc sections for | |
2517 | global syms. */ | |
2518 | ||
2519 | static bfd_boolean | |
2520 | allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf) | |
2521 | { | |
2522 | struct bfd_link_info *info; | |
2523 | struct elf_metag_link_hash_table *htab; | |
3bf083ed | 2524 | struct elf_dyn_relocs *hdh_p; |
a3c62988 NC |
2525 | |
2526 | if (eh->root.type == bfd_link_hash_indirect) | |
2527 | return TRUE; | |
2528 | ||
2529 | if (eh->root.type == bfd_link_hash_warning) | |
2530 | eh = (struct elf_link_hash_entry *) eh->root.u.i.link; | |
2531 | ||
2532 | info = inf; | |
2533 | htab = metag_link_hash_table (info); | |
2534 | ||
2535 | if (htab->etab.dynamic_sections_created | |
2536 | && eh->plt.refcount > 0) | |
2537 | { | |
2538 | /* Make sure this symbol is output as a dynamic symbol. | |
2539 | Undefined weak syms won't yet be marked as dynamic. */ | |
2540 | if (eh->dynindx == -1 | |
2541 | && !eh->forced_local) | |
2542 | { | |
2543 | if (! bfd_elf_link_record_dynamic_symbol (info, eh)) | |
2544 | return FALSE; | |
2545 | } | |
2546 | ||
0e1862bb | 2547 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh)) |
a3c62988 | 2548 | { |
ce558b89 | 2549 | asection *s = htab->etab.splt; |
a3c62988 NC |
2550 | |
2551 | /* If this is the first .plt entry, make room for the special | |
2552 | first entry. */ | |
2553 | if (s->size == 0) | |
2554 | s->size += PLT_ENTRY_SIZE; | |
2555 | ||
2556 | eh->plt.offset = s->size; | |
2557 | ||
2558 | /* If this symbol is not defined in a regular file, and we are | |
2559 | not generating a shared library, then set the symbol to this | |
2560 | location in the .plt. This is required to make function | |
2561 | pointers compare as equal between the normal executable and | |
2562 | the shared library. */ | |
0e1862bb | 2563 | if (! bfd_link_pic (info) |
a3c62988 NC |
2564 | && !eh->def_regular) |
2565 | { | |
2566 | eh->root.u.def.section = s; | |
2567 | eh->root.u.def.value = eh->plt.offset; | |
2568 | } | |
2569 | ||
2570 | /* Make room for this entry. */ | |
2571 | s->size += PLT_ENTRY_SIZE; | |
2572 | ||
2573 | /* We also need to make an entry in the .got.plt section, which | |
2574 | will be placed in the .got section by the linker script. */ | |
ce558b89 | 2575 | htab->etab.sgotplt->size += 4; |
a3c62988 NC |
2576 | |
2577 | /* We also need to make an entry in the .rel.plt section. */ | |
ce558b89 | 2578 | htab->etab.srelplt->size += sizeof (Elf32_External_Rela); |
a3c62988 NC |
2579 | } |
2580 | else | |
2581 | { | |
2582 | eh->plt.offset = (bfd_vma) -1; | |
2583 | eh->needs_plt = 0; | |
2584 | } | |
2585 | } | |
2586 | else | |
2587 | { | |
2588 | eh->plt.offset = (bfd_vma) -1; | |
2589 | eh->needs_plt = 0; | |
2590 | } | |
2591 | ||
2592 | if (eh->got.refcount > 0) | |
2593 | { | |
2594 | asection *s; | |
2595 | bfd_boolean dyn; | |
2596 | int tls_type = metag_elf_hash_entry (eh)->tls_type; | |
2597 | ||
2598 | /* Make sure this symbol is output as a dynamic symbol. | |
2599 | Undefined weak syms won't yet be marked as dynamic. */ | |
2600 | if (eh->dynindx == -1 | |
2601 | && !eh->forced_local) | |
2602 | { | |
2603 | if (! bfd_elf_link_record_dynamic_symbol (info, eh)) | |
2604 | return FALSE; | |
2605 | } | |
2606 | ||
ce558b89 | 2607 | s = htab->etab.sgot; |
a3c62988 NC |
2608 | |
2609 | eh->got.offset = s->size; | |
2610 | s->size += 4; | |
2611 | /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */ | |
2612 | if (tls_type == GOT_TLS_GD) | |
2613 | s->size += 4; | |
2614 | dyn = htab->etab.dynamic_sections_created; | |
2615 | /* R_METAG_TLS_IE needs one dynamic relocation if dynamic, | |
2616 | R_METAG_TLS_GD needs one if local symbol and two if global. */ | |
2617 | if ((tls_type == GOT_TLS_GD && eh->dynindx == -1) | |
2618 | || (tls_type == GOT_TLS_IE && dyn)) | |
ce558b89 | 2619 | htab->etab.srelgot->size += sizeof (Elf32_External_Rela); |
a3c62988 | 2620 | else if (tls_type == GOT_TLS_GD) |
ce558b89 | 2621 | htab->etab.srelgot->size += 2 * sizeof (Elf32_External_Rela); |
0e1862bb L |
2622 | else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
2623 | bfd_link_pic (info), | |
2624 | eh)) | |
ce558b89 | 2625 | htab->etab.srelgot->size += sizeof (Elf32_External_Rela); |
a3c62988 NC |
2626 | } |
2627 | else | |
2628 | eh->got.offset = (bfd_vma) -1; | |
2629 | ||
190eb1dd | 2630 | if (eh->dyn_relocs == NULL) |
a3c62988 NC |
2631 | return TRUE; |
2632 | ||
2633 | /* If this is a -Bsymbolic shared link, then we need to discard all | |
2634 | space allocated for dynamic pc-relative relocs against symbols | |
2635 | defined in a regular object. For the normal shared case, discard | |
2636 | space for relocs that have become local due to symbol visibility | |
2637 | changes. */ | |
0e1862bb | 2638 | if (bfd_link_pic (info)) |
a3c62988 NC |
2639 | { |
2640 | if (SYMBOL_CALLS_LOCAL (info, eh)) | |
2641 | { | |
3bf083ed | 2642 | struct elf_dyn_relocs **hdh_pp; |
a3c62988 | 2643 | |
190eb1dd | 2644 | for (hdh_pp = &eh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; ) |
a3c62988 | 2645 | { |
3bf083ed AM |
2646 | hdh_p->count -= hdh_p->pc_count; |
2647 | hdh_p->pc_count = 0; | |
a3c62988 | 2648 | if (hdh_p->count == 0) |
3bf083ed | 2649 | *hdh_pp = hdh_p->next; |
a3c62988 | 2650 | else |
3bf083ed | 2651 | hdh_pp = &hdh_p->next; |
a3c62988 NC |
2652 | } |
2653 | } | |
2654 | ||
2655 | /* Also discard relocs on undefined weak syms with non-default | |
2656 | visibility. */ | |
190eb1dd | 2657 | if (eh->dyn_relocs != NULL |
a3c62988 NC |
2658 | && eh->root.type == bfd_link_hash_undefweak) |
2659 | { | |
2660 | if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT) | |
190eb1dd | 2661 | eh->dyn_relocs = NULL; |
a3c62988 NC |
2662 | |
2663 | /* Make sure undefined weak symbols are output as a dynamic | |
2664 | symbol in PIEs. */ | |
2665 | else if (eh->dynindx == -1 | |
2666 | && !eh->forced_local) | |
2667 | { | |
2668 | if (! bfd_elf_link_record_dynamic_symbol (info, eh)) | |
2669 | return FALSE; | |
2670 | } | |
2671 | } | |
2672 | } | |
2673 | else | |
2674 | { | |
2675 | /* For the non-shared case, discard space for relocs against | |
2676 | symbols which turn out to need copy relocs or are not | |
2677 | dynamic. */ | |
2678 | if (!eh->non_got_ref | |
2679 | && ((eh->def_dynamic | |
2680 | && !eh->def_regular) | |
2681 | || (htab->etab.dynamic_sections_created | |
2682 | && (eh->root.type == bfd_link_hash_undefweak | |
2683 | || eh->root.type == bfd_link_hash_undefined)))) | |
2684 | { | |
2685 | /* Make sure this symbol is output as a dynamic symbol. | |
2686 | Undefined weak syms won't yet be marked as dynamic. */ | |
2687 | if (eh->dynindx == -1 | |
2688 | && !eh->forced_local) | |
2689 | { | |
2690 | if (! bfd_elf_link_record_dynamic_symbol (info, eh)) | |
2691 | return FALSE; | |
2692 | } | |
2693 | ||
2694 | /* If that succeeded, we know we'll be keeping all the | |
2695 | relocs. */ | |
2696 | if (eh->dynindx != -1) | |
2697 | goto keep; | |
2698 | } | |
2699 | ||
190eb1dd | 2700 | eh->dyn_relocs = NULL; |
a3c62988 NC |
2701 | return TRUE; |
2702 | ||
2703 | keep: ; | |
2704 | } | |
2705 | ||
2706 | /* Finally, allocate space. */ | |
190eb1dd | 2707 | for (hdh_p = eh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->next) |
a3c62988 NC |
2708 | { |
2709 | asection *sreloc = elf_section_data (hdh_p->sec)->sreloc; | |
2710 | sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela); | |
2711 | } | |
2712 | ||
2713 | return TRUE; | |
2714 | } | |
2715 | ||
a3c62988 NC |
2716 | /* Set the sizes of the dynamic sections. */ |
2717 | ||
2718 | static bfd_boolean | |
2719 | elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, | |
2720 | struct bfd_link_info *info) | |
2721 | { | |
2722 | struct elf_metag_link_hash_table *htab; | |
2723 | bfd *dynobj; | |
2724 | bfd *ibfd; | |
2725 | asection *s; | |
2726 | bfd_boolean relocs; | |
2727 | ||
2728 | htab = metag_link_hash_table (info); | |
2729 | dynobj = htab->etab.dynobj; | |
2730 | if (dynobj == NULL) | |
2731 | abort (); | |
2732 | ||
2733 | if (htab->etab.dynamic_sections_created) | |
2734 | { | |
2735 | /* Set the contents of the .interp section to the interpreter. */ | |
9b8b325a | 2736 | if (bfd_link_executable (info) && !info->nointerp) |
a3c62988 | 2737 | { |
ad1fc92a | 2738 | s = bfd_get_linker_section (dynobj, ".interp"); |
a3c62988 NC |
2739 | if (s == NULL) |
2740 | abort (); | |
2741 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
2742 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
2743 | } | |
2744 | } | |
2745 | ||
2746 | /* Set up .got offsets for local syms, and space for local dynamic | |
2747 | relocs. */ | |
c72f2fb2 | 2748 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
a3c62988 NC |
2749 | { |
2750 | bfd_signed_vma *local_got; | |
2751 | bfd_signed_vma *end_local_got; | |
2752 | bfd_size_type locsymcount; | |
2753 | Elf_Internal_Shdr *symtab_hdr; | |
2754 | asection *srel; | |
2755 | char *local_tls_type; | |
2756 | ||
2757 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
2758 | continue; | |
2759 | ||
2760 | for (s = ibfd->sections; s != NULL; s = s->next) | |
2761 | { | |
3bf083ed | 2762 | struct elf_dyn_relocs *hdh_p; |
a3c62988 | 2763 | |
3bf083ed | 2764 | for (hdh_p = ((struct elf_dyn_relocs *) |
a3c62988 NC |
2765 | elf_section_data (s)->local_dynrel); |
2766 | hdh_p != NULL; | |
3bf083ed | 2767 | hdh_p = hdh_p->next) |
a3c62988 NC |
2768 | { |
2769 | if (!bfd_is_abs_section (hdh_p->sec) | |
2770 | && bfd_is_abs_section (hdh_p->sec->output_section)) | |
2771 | { | |
2772 | /* Input section has been discarded, either because | |
2773 | it is a copy of a linkonce section or due to | |
2774 | linker script /DISCARD/, so we'll be discarding | |
2775 | the relocs too. */ | |
2776 | } | |
2777 | else if (hdh_p->count != 0) | |
2778 | { | |
2779 | srel = elf_section_data (hdh_p->sec)->sreloc; | |
2780 | srel->size += hdh_p->count * sizeof (Elf32_External_Rela); | |
2781 | if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0) | |
2782 | info->flags |= DF_TEXTREL; | |
2783 | } | |
2784 | } | |
2785 | } | |
2786 | ||
2787 | local_got = elf_local_got_refcounts (ibfd); | |
2788 | if (!local_got) | |
2789 | continue; | |
2790 | ||
2791 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2792 | locsymcount = symtab_hdr->sh_info; | |
2793 | end_local_got = local_got + locsymcount; | |
2794 | local_tls_type = metag_elf_local_got_tls_type (ibfd); | |
ce558b89 AM |
2795 | s = htab->etab.sgot; |
2796 | srel = htab->etab.srelgot; | |
a3c62988 NC |
2797 | for (; local_got < end_local_got; ++local_got) |
2798 | { | |
2799 | if (*local_got > 0) | |
2800 | { | |
2801 | *local_got = s->size; | |
2802 | s->size += GOT_ENTRY_SIZE; | |
2803 | /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */ | |
2804 | if (*local_tls_type == GOT_TLS_GD) | |
2805 | s->size += 4; | |
0e1862bb | 2806 | if (bfd_link_pic (info)) |
a3c62988 NC |
2807 | srel->size += sizeof (Elf32_External_Rela); |
2808 | } | |
2809 | else | |
2810 | *local_got = (bfd_vma) -1; | |
2811 | ++local_tls_type; | |
2812 | } | |
2813 | } | |
2814 | ||
2815 | if (htab->tls_ldm_got.refcount > 0) | |
2816 | { | |
2817 | /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM | |
2818 | reloc. */ | |
ce558b89 AM |
2819 | htab->tls_ldm_got.offset = htab->etab.sgot->size; |
2820 | htab->etab.sgot->size += 8; | |
2821 | htab->etab.srelgot->size += sizeof (Elf32_External_Rela); | |
a3c62988 NC |
2822 | } |
2823 | else | |
2824 | htab->tls_ldm_got.offset = -1; | |
2825 | ||
2826 | /* Allocate global sym .plt and .got entries, and space for global | |
2827 | sym dynamic relocs. */ | |
2828 | elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info); | |
2829 | ||
2830 | /* We now have determined the sizes of the various dynamic sections. | |
2831 | Allocate memory for them. */ | |
2832 | relocs = FALSE; | |
2833 | for (s = dynobj->sections; s != NULL; s = s->next) | |
2834 | { | |
2835 | bfd_boolean reloc_section = FALSE; | |
2836 | ||
2837 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2838 | continue; | |
2839 | ||
ce558b89 AM |
2840 | if (s == htab->etab.splt |
2841 | || s == htab->etab.sgot | |
2842 | || s == htab->etab.sgotplt | |
5474d94f AM |
2843 | || s == htab->etab.sdynbss |
2844 | || s == htab->etab.sdynrelro) | |
a3c62988 NC |
2845 | { |
2846 | /* Strip this section if we don't need it; see the | |
2847 | comment below. */ | |
2848 | } | |
fd361982 | 2849 | else if (CONST_STRNEQ (bfd_section_name (s), ".rela")) |
a3c62988 | 2850 | { |
ce558b89 | 2851 | if (s->size != 0 && s != htab->etab.srelplt) |
a3c62988 NC |
2852 | relocs = TRUE; |
2853 | ||
2854 | /* We use the reloc_count field as a counter if we need | |
2855 | to copy relocs into the output file. */ | |
2856 | s->reloc_count = 0; | |
2857 | reloc_section = TRUE; | |
2858 | } | |
2859 | else | |
2860 | { | |
2861 | /* It's not one of our sections, so don't allocate space. */ | |
2862 | continue; | |
2863 | } | |
2864 | ||
2865 | if (s->size == 0) | |
2866 | { | |
2867 | /* If we don't need this section, strip it from the | |
2868 | output file. This is mostly to handle .rela.bss and | |
2869 | .rela.plt. We must create both sections in | |
2870 | create_dynamic_sections, because they must be created | |
2871 | before the linker maps input sections to output | |
2872 | sections. The linker does that before | |
2873 | adjust_dynamic_symbol is called, and it is that | |
2874 | function which decides whether anything needs to go | |
2875 | into these sections. */ | |
2876 | s->flags |= SEC_EXCLUDE; | |
2877 | continue; | |
2878 | } | |
2879 | ||
2880 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
2881 | continue; | |
2882 | ||
2883 | /* Allocate memory for the section contents. */ | |
2884 | s->contents = bfd_zalloc (dynobj, s->size); | |
2885 | if (s->contents == NULL) | |
2886 | return FALSE; | |
2887 | else if (reloc_section) | |
2888 | { | |
2889 | unsigned char *contents = s->contents; | |
2890 | Elf32_External_Rela reloc; | |
2891 | ||
2892 | /* Fill the reloc section with a R_METAG_NONE type reloc. */ | |
2893 | memset(&reloc, 0, sizeof(Elf32_External_Rela)); | |
2894 | reloc.r_info[0] = R_METAG_NONE; | |
2895 | for (; contents < (s->contents + s->size); | |
2896 | contents += sizeof(Elf32_External_Rela)) | |
2897 | { | |
2898 | memcpy(contents, &reloc, sizeof(Elf32_External_Rela)); | |
2899 | } | |
2900 | } | |
2901 | } | |
2902 | ||
3084d7a2 | 2903 | return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs); |
a3c62988 NC |
2904 | } |
2905 | ||
2906 | /* Finish up dynamic symbol handling. We set the contents of various | |
2907 | dynamic sections here. */ | |
2908 | ||
2909 | static bfd_boolean | |
2910 | elf_metag_finish_dynamic_symbol (bfd *output_bfd, | |
2911 | struct bfd_link_info *info, | |
2912 | struct elf_link_hash_entry *eh, | |
2913 | Elf_Internal_Sym *sym) | |
2914 | { | |
2915 | struct elf_metag_link_hash_table *htab; | |
2916 | Elf_Internal_Rela rel; | |
2917 | bfd_byte *loc; | |
2918 | ||
2919 | htab = metag_link_hash_table (info); | |
2920 | ||
2921 | if (eh->plt.offset != (bfd_vma) -1) | |
2922 | { | |
2923 | asection *splt; | |
2924 | asection *sgot; | |
2925 | asection *srela; | |
2926 | ||
2927 | bfd_vma plt_index; | |
2928 | bfd_vma got_offset; | |
2929 | bfd_vma got_entry; | |
2930 | ||
2931 | if (eh->plt.offset & 1) | |
2932 | abort (); | |
2933 | ||
2934 | BFD_ASSERT (eh->dynindx != -1); | |
2935 | ||
ce558b89 AM |
2936 | splt = htab->etab.splt; |
2937 | sgot = htab->etab.sgotplt; | |
2938 | srela = htab->etab.srelplt; | |
a3c62988 NC |
2939 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); |
2940 | ||
2941 | /* Get the index in the procedure linkage table which | |
2942 | corresponds to this symbol. This is the index of this symbol | |
2943 | in all the symbols for which we are making plt entries. The | |
2944 | first entry in the procedure linkage table is reserved. */ | |
2945 | plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1; | |
2946 | ||
2947 | /* Get the offset into the .got.plt table of the entry that | |
2948 | corresponds to this function. */ | |
2949 | got_offset = plt_index * GOT_ENTRY_SIZE; | |
2950 | ||
2951 | BFD_ASSERT (got_offset < (1 << 16)); | |
2952 | ||
2953 | got_entry = sgot->output_section->vma | |
2954 | + sgot->output_offset | |
2955 | + got_offset; | |
2956 | ||
2957 | BFD_ASSERT (plt_index < (1 << 16)); | |
2958 | ||
2959 | /* Fill in the entry in the procedure linkage table. */ | |
0e1862bb | 2960 | if (! bfd_link_pic (info)) |
a3c62988 NC |
2961 | { |
2962 | bfd_put_32 (output_bfd, | |
2963 | (plt_entry[0] | |
2964 | | (((got_entry >> 16) & 0xffff) << 3)), | |
2965 | splt->contents + eh->plt.offset); | |
2966 | bfd_put_32 (output_bfd, | |
2967 | (plt_entry[1] | |
2968 | | ((got_entry & 0xffff) << 3)), | |
2969 | splt->contents + eh->plt.offset + 4); | |
2970 | bfd_put_32 (output_bfd, plt_entry[2], | |
2971 | splt->contents + eh->plt.offset + 8); | |
2972 | bfd_put_32 (output_bfd, | |
2973 | (plt_entry[3] | (plt_index << 3)), | |
2974 | splt->contents + eh->plt.offset + 12); | |
2975 | bfd_put_32 (output_bfd, | |
2976 | (plt_entry[4] | |
2977 | | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)), | |
2978 | splt->contents + eh->plt.offset + 16); | |
2979 | } | |
2980 | else | |
2981 | { | |
2982 | bfd_vma addr = got_entry - (splt->output_section->vma + | |
2983 | splt->output_offset + eh->plt.offset); | |
2984 | ||
2985 | bfd_put_32 (output_bfd, | |
2986 | plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3), | |
2987 | splt->contents + eh->plt.offset); | |
2988 | bfd_put_32 (output_bfd, | |
2989 | plt_pic_entry[1] | ((addr & 0xffff) << 3), | |
2990 | splt->contents + eh->plt.offset + 4); | |
2991 | bfd_put_32 (output_bfd, plt_pic_entry[2], | |
2992 | splt->contents + eh->plt.offset + 8); | |
2993 | bfd_put_32 (output_bfd, | |
2994 | (plt_pic_entry[3] | (plt_index << 3)), | |
2995 | splt->contents + eh->plt.offset + 12); | |
2996 | bfd_put_32 (output_bfd, | |
2997 | (plt_pic_entry[4] | |
2998 | + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)), | |
2999 | splt->contents + eh->plt.offset + 16); | |
3000 | } | |
3001 | ||
3002 | /* Fill in the entry in the global offset table. */ | |
3003 | bfd_put_32 (output_bfd, | |
3004 | (splt->output_section->vma | |
3005 | + splt->output_offset | |
3006 | + eh->plt.offset | |
3007 | + 12), /* offset within PLT entry */ | |
3008 | sgot->contents + got_offset); | |
3009 | ||
3010 | /* Fill in the entry in the .rela.plt section. */ | |
3011 | rel.r_offset = (sgot->output_section->vma | |
3012 | + sgot->output_offset | |
3013 | + got_offset); | |
3014 | rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT); | |
3015 | rel.r_addend = 0; | |
ce558b89 | 3016 | loc = htab->etab.srelplt->contents; |
a3c62988 NC |
3017 | loc += plt_index * sizeof(Elf32_External_Rela); |
3018 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
3019 | ||
3020 | if (!eh->def_regular) | |
3021 | { | |
3022 | /* Mark the symbol as undefined, rather than as defined in | |
3023 | the .plt section. Leave the value alone. */ | |
3024 | sym->st_shndx = SHN_UNDEF; | |
3025 | } | |
3026 | } | |
3027 | ||
3028 | if (eh->got.offset != (bfd_vma) -1 | |
3029 | && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0 | |
3030 | && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0) | |
3031 | { | |
3032 | /* This symbol has an entry in the global offset table. Set it | |
3033 | up. */ | |
3034 | ||
3035 | rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1) | |
ce558b89 AM |
3036 | + htab->etab.sgot->output_offset |
3037 | + htab->etab.sgot->output_section->vma); | |
a3c62988 NC |
3038 | |
3039 | /* If this is a -Bsymbolic link and the symbol is defined | |
3040 | locally or was forced to be local because of a version file, | |
3041 | we just want to emit a RELATIVE reloc. The entry in the | |
3042 | global offset table will already have been initialized in the | |
3043 | relocate_section function. */ | |
0e1862bb | 3044 | if (bfd_link_pic (info) |
a3c62988 NC |
3045 | && (info->symbolic || eh->dynindx == -1) |
3046 | && eh->def_regular) | |
3047 | { | |
3048 | rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE); | |
3049 | rel.r_addend = (eh->root.u.def.value | |
3050 | + eh->root.u.def.section->output_offset | |
3051 | + eh->root.u.def.section->output_section->vma); | |
3052 | } | |
3053 | else | |
3054 | { | |
3055 | if ((eh->got.offset & 1) != 0) | |
3056 | abort (); | |
ce558b89 | 3057 | bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + eh->got.offset); |
a3c62988 NC |
3058 | rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT); |
3059 | rel.r_addend = 0; | |
3060 | } | |
3061 | ||
ce558b89 AM |
3062 | loc = htab->etab.srelgot->contents; |
3063 | loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
a3c62988 NC |
3064 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
3065 | } | |
3066 | ||
3067 | if (eh->needs_copy) | |
3068 | { | |
3069 | asection *s; | |
3070 | ||
3071 | /* This symbol needs a copy reloc. Set it up. */ | |
3072 | ||
3073 | if (! (eh->dynindx != -1 | |
3074 | && (eh->root.type == bfd_link_hash_defined | |
3075 | || eh->root.type == bfd_link_hash_defweak))) | |
3076 | abort (); | |
3077 | ||
a3c62988 NC |
3078 | rel.r_offset = (eh->root.u.def.value |
3079 | + eh->root.u.def.section->output_offset | |
3080 | + eh->root.u.def.section->output_section->vma); | |
3081 | rel.r_addend = 0; | |
3082 | rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY); | |
afbf7e8e | 3083 | if (eh->root.u.def.section == htab->etab.sdynrelro) |
5474d94f AM |
3084 | s = htab->etab.sreldynrelro; |
3085 | else | |
3086 | s = htab->etab.srelbss; | |
a3c62988 NC |
3087 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
3088 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
3089 | } | |
3090 | ||
3091 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
3092 | if (eh->root.root.string[0] == '_' | |
3093 | && (strcmp (eh->root.root.string, "_DYNAMIC") == 0 | |
3094 | || eh == htab->etab.hgot)) | |
3095 | { | |
3096 | sym->st_shndx = SHN_ABS; | |
3097 | } | |
3098 | ||
3099 | return TRUE; | |
3100 | } | |
3101 | ||
3102 | /* Set the Meta ELF ABI version. */ | |
3103 | ||
ed7e9d0b AM |
3104 | static bfd_boolean |
3105 | elf_metag_init_file_header (bfd *abfd, struct bfd_link_info *link_info) | |
a3c62988 NC |
3106 | { |
3107 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ | |
3108 | ||
ed7e9d0b AM |
3109 | if (!_bfd_elf_init_file_header (abfd, link_info)) |
3110 | return FALSE; | |
3111 | ||
a3c62988 NC |
3112 | i_ehdrp = elf_elfheader (abfd); |
3113 | i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION; | |
ed7e9d0b | 3114 | return TRUE; |
a3c62988 NC |
3115 | } |
3116 | ||
3117 | /* Used to decide how to sort relocs in an optimal manner for the | |
3118 | dynamic linker, before writing them out. */ | |
3119 | ||
3120 | static enum elf_reloc_type_class | |
7e612e98 AM |
3121 | elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
3122 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
3123 | const Elf_Internal_Rela *rela) | |
a3c62988 NC |
3124 | { |
3125 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
3126 | { | |
3127 | case R_METAG_RELATIVE: | |
3128 | return reloc_class_relative; | |
3129 | case R_METAG_JMP_SLOT: | |
3130 | return reloc_class_plt; | |
3131 | case R_METAG_COPY: | |
3132 | return reloc_class_copy; | |
3133 | default: | |
3134 | return reloc_class_normal; | |
3135 | } | |
3136 | } | |
3137 | ||
3138 | /* Finish up the dynamic sections. */ | |
3139 | ||
3140 | static bfd_boolean | |
3141 | elf_metag_finish_dynamic_sections (bfd *output_bfd, | |
3142 | struct bfd_link_info *info) | |
3143 | { | |
3144 | bfd *dynobj; | |
3145 | struct elf_metag_link_hash_table *htab; | |
3146 | asection *sdyn; | |
3147 | ||
3148 | htab = metag_link_hash_table (info); | |
3149 | dynobj = htab->etab.dynobj; | |
3150 | ||
ad1fc92a | 3151 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
a3c62988 NC |
3152 | |
3153 | if (htab->etab.dynamic_sections_created) | |
3154 | { | |
3155 | asection *splt; | |
3156 | Elf32_External_Dyn *dyncon, *dynconend; | |
3157 | ||
3158 | if (sdyn == NULL) | |
3159 | abort (); | |
3160 | ||
3161 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
3162 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); | |
3163 | for (; dyncon < dynconend; dyncon++) | |
3164 | { | |
3165 | Elf_Internal_Dyn dyn; | |
3166 | asection *s; | |
3167 | ||
3168 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
3169 | ||
3170 | switch (dyn.d_tag) | |
3171 | { | |
3172 | default: | |
3173 | continue; | |
3174 | ||
3175 | case DT_PLTGOT: | |
ce558b89 | 3176 | s = htab->etab.sgot; |
4ade44b7 | 3177 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
a3c62988 NC |
3178 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
3179 | break; | |
3180 | ||
3181 | case DT_JMPREL: | |
ce558b89 | 3182 | s = htab->etab.srelplt; |
4ade44b7 | 3183 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
a3c62988 NC |
3184 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
3185 | break; | |
3186 | ||
3187 | case DT_PLTRELSZ: | |
ce558b89 | 3188 | s = htab->etab.srelplt; |
a3c62988 NC |
3189 | dyn.d_un.d_val = s->size; |
3190 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3191 | break; | |
a3c62988 NC |
3192 | } |
3193 | ||
3194 | } | |
3195 | ||
3196 | /* Fill in the first entry in the procedure linkage table. */ | |
ce558b89 | 3197 | splt = htab->etab.splt; |
a3c62988 NC |
3198 | if (splt && splt->size > 0) |
3199 | { | |
3200 | unsigned long addr; | |
3201 | /* addr = .got + 4 */ | |
ce558b89 AM |
3202 | addr = (htab->etab.sgot->output_section->vma |
3203 | + htab->etab.sgot->output_offset + 4); | |
0e1862bb | 3204 | if (bfd_link_pic (info)) |
a3c62988 NC |
3205 | { |
3206 | addr -= splt->output_section->vma + splt->output_offset; | |
3207 | bfd_put_32 (output_bfd, | |
3208 | plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3), | |
3209 | splt->contents); | |
3210 | bfd_put_32 (output_bfd, | |
3211 | plt0_pic_entry[1] | ((addr & 0xffff) << 3), | |
3212 | splt->contents + 4); | |
3213 | bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8); | |
3214 | bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12); | |
3215 | bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16); | |
3216 | } | |
3217 | else | |
3218 | { | |
3219 | bfd_put_32 (output_bfd, | |
3220 | plt0_entry[0] | (((addr >> 16) & 0xffff) << 3), | |
3221 | splt->contents); | |
3222 | bfd_put_32 (output_bfd, | |
3223 | plt0_entry[1] | ((addr & 0xffff) << 3), | |
3224 | splt->contents + 4); | |
3225 | bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8); | |
3226 | bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12); | |
3227 | bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16); | |
3228 | } | |
3229 | ||
3230 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = | |
3231 | PLT_ENTRY_SIZE; | |
3232 | } | |
3233 | } | |
3234 | ||
ce558b89 | 3235 | if (htab->etab.sgot != NULL && htab->etab.sgot->size != 0) |
a3c62988 NC |
3236 | { |
3237 | /* Fill in the first entry in the global offset table. | |
3238 | We use it to point to our dynamic section, if we have one. */ | |
3239 | bfd_put_32 (output_bfd, | |
3240 | sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0, | |
ce558b89 | 3241 | htab->etab.sgot->contents); |
a3c62988 NC |
3242 | |
3243 | /* The second entry is reserved for use by the dynamic linker. */ | |
ce558b89 | 3244 | memset (htab->etab.sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE); |
a3c62988 NC |
3245 | |
3246 | /* Set .got entry size. */ | |
ce558b89 | 3247 | elf_section_data (htab->etab.sgot->output_section) |
a3c62988 NC |
3248 | ->this_hdr.sh_entsize = GOT_ENTRY_SIZE; |
3249 | } | |
3250 | ||
3251 | return TRUE; | |
3252 | } | |
3253 | ||
3254 | /* Return the section that should be marked against GC for a given | |
3255 | relocation. */ | |
3256 | ||
3257 | static asection * | |
3258 | elf_metag_gc_mark_hook (asection *sec, | |
3259 | struct bfd_link_info *info, | |
3260 | Elf_Internal_Rela *rela, | |
3261 | struct elf_link_hash_entry *hh, | |
3262 | Elf_Internal_Sym *sym) | |
3263 | { | |
3264 | if (hh != NULL) | |
3265 | switch ((unsigned int) ELF32_R_TYPE (rela->r_info)) | |
3266 | { | |
3267 | case R_METAG_GNU_VTINHERIT: | |
3268 | case R_METAG_GNU_VTENTRY: | |
3269 | return NULL; | |
3270 | } | |
3271 | ||
3272 | return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym); | |
3273 | } | |
3274 | ||
a3c62988 NC |
3275 | /* Determine the type of stub needed, if any, for a call. */ |
3276 | ||
3277 | static enum elf_metag_stub_type | |
3278 | metag_type_of_stub (asection *input_sec, | |
3279 | const Elf_Internal_Rela *rel, | |
3280 | struct elf_metag_link_hash_entry *hh, | |
3281 | bfd_vma destination, | |
3282 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3283 | { | |
3284 | bfd_vma location; | |
3285 | bfd_vma branch_offset; | |
3286 | bfd_vma max_branch_offset; | |
3287 | ||
3288 | if (hh != NULL && | |
3289 | !(hh->eh.root.type == bfd_link_hash_defined | |
3290 | || hh->eh.root.type == bfd_link_hash_defweak)) | |
3291 | return metag_stub_none; | |
3292 | ||
3293 | /* Determine where the call point is. */ | |
3294 | location = (input_sec->output_offset | |
3295 | + input_sec->output_section->vma | |
3296 | + rel->r_offset); | |
3297 | ||
3298 | branch_offset = destination - location; | |
3299 | ||
3300 | /* Determine if a long branch stub is needed. Meta branch offsets | |
3301 | are signed 19 bits 4 byte aligned. */ | |
3302 | max_branch_offset = (1 << (BRANCH_BITS-1)) << 2; | |
3303 | ||
3304 | if (branch_offset + max_branch_offset >= 2*max_branch_offset) | |
3305 | { | |
0e1862bb | 3306 | if (bfd_link_pic (info)) |
a3c62988 NC |
3307 | return metag_stub_long_branch_shared; |
3308 | else | |
3309 | return metag_stub_long_branch; | |
3310 | } | |
3311 | ||
3312 | return metag_stub_none; | |
3313 | } | |
3314 | ||
3315 | #define MOVT_A0_3 0x82180005 | |
3316 | #define JUMP_A0_3 0xac180003 | |
3317 | ||
3318 | #define MOVT_A1LBP 0x83080005 | |
3319 | #define ADD_A1LBP 0x83080000 | |
3320 | ||
3321 | #define ADDT_A0_3_CPC 0x82980001 | |
3322 | #define ADD_A0_3_A0_3 0x82180000 | |
3323 | #define MOV_PC_A0_3 0xa3180ca0 | |
3324 | ||
3325 | static bfd_boolean | |
abf874aa | 3326 | metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
a3c62988 NC |
3327 | { |
3328 | struct elf_metag_stub_hash_entry *hsh; | |
3329 | asection *stub_sec; | |
3330 | bfd *stub_bfd; | |
3331 | bfd_byte *loc; | |
3332 | bfd_vma sym_value; | |
3333 | int size; | |
abf874aa | 3334 | struct bfd_link_info *info; |
a3c62988 NC |
3335 | |
3336 | /* Massage our args to the form they really have. */ | |
3337 | hsh = (struct elf_metag_stub_hash_entry *) gen_entry; | |
abf874aa CL |
3338 | info = (struct bfd_link_info *) in_arg; |
3339 | ||
3340 | /* Fail if the target section could not be assigned to an output | |
3341 | section. The user should fix his linker script. */ | |
3342 | if (hsh->target_section->output_section == NULL | |
3343 | && info->non_contiguous_regions) | |
53215f21 CL |
3344 | info->callbacks->einfo (_("%F%P: Could not assign '%pA' to an output section. " |
3345 | "Retry without --enable-non-contiguous-regions.\n"), | |
3346 | hsh->target_section); | |
a3c62988 NC |
3347 | |
3348 | stub_sec = hsh->stub_sec; | |
3349 | ||
3350 | /* Make a note of the offset within the stubs for this entry. */ | |
3351 | hsh->stub_offset = stub_sec->size; | |
3352 | loc = stub_sec->contents + hsh->stub_offset; | |
3353 | ||
3354 | stub_bfd = stub_sec->owner; | |
3355 | ||
3356 | switch (hsh->stub_type) | |
3357 | { | |
3358 | case metag_stub_long_branch_shared: | |
3359 | /* A PIC long branch stub is an ADDT and an ADD instruction used to | |
3360 | calculate the jump target using A0.3 as a temporary. Then a MOV | |
3361 | to PC carries out the jump. */ | |
3362 | sym_value = (hsh->target_value | |
3363 | + hsh->target_section->output_offset | |
3364 | + hsh->target_section->output_section->vma | |
3365 | + hsh->addend); | |
3366 | ||
3367 | sym_value -= (hsh->stub_offset | |
3368 | + stub_sec->output_offset | |
3369 | + stub_sec->output_section->vma); | |
3370 | ||
3371 | bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3), | |
3372 | loc); | |
3373 | ||
3374 | bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3), | |
3375 | loc + 4); | |
3376 | ||
3377 | bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8); | |
3378 | ||
3379 | size = 12; | |
3380 | break; | |
3381 | case metag_stub_long_branch: | |
3382 | /* A standard long branch stub is a MOVT instruction followed by a | |
3383 | JUMP instruction using the A0.3 register as a temporary. This is | |
3384 | the same method used by the LDLK linker (patch.c). */ | |
3385 | sym_value = (hsh->target_value | |
3386 | + hsh->target_section->output_offset | |
3387 | + hsh->target_section->output_section->vma | |
3388 | + hsh->addend); | |
3389 | ||
3390 | bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3), | |
3391 | loc); | |
3392 | ||
3393 | bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4); | |
3394 | ||
3395 | size = 8; | |
3396 | break; | |
3397 | default: | |
3398 | BFD_FAIL (); | |
3399 | return FALSE; | |
3400 | } | |
3401 | ||
3402 | stub_sec->size += size; | |
3403 | return TRUE; | |
3404 | } | |
3405 | ||
3406 | /* As above, but don't actually build the stub. Just bump offset so | |
3407 | we know stub section sizes. */ | |
3408 | ||
3409 | static bfd_boolean | |
3410 | metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED) | |
3411 | { | |
3412 | struct elf_metag_stub_hash_entry *hsh; | |
3413 | int size = 0; | |
3414 | ||
3415 | /* Massage our args to the form they really have. */ | |
3416 | hsh = (struct elf_metag_stub_hash_entry *) gen_entry; | |
3417 | ||
3418 | if (hsh->stub_type == metag_stub_long_branch) | |
3419 | size = 8; | |
3420 | else if (hsh->stub_type == metag_stub_long_branch_shared) | |
3421 | size = 12; | |
3422 | ||
3423 | hsh->stub_sec->size += size; | |
3424 | return TRUE; | |
3425 | } | |
3426 | ||
3427 | /* Set up various things so that we can make a list of input sections | |
3428 | for each output section included in the link. Returns -1 on error, | |
3429 | 0 when no stubs will be needed, and 1 on success. */ | |
3430 | ||
3431 | int | |
3432 | elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) | |
3433 | { | |
3434 | bfd *input_bfd; | |
3435 | unsigned int bfd_count; | |
7292b3ac | 3436 | unsigned int top_id, top_index; |
a3c62988 NC |
3437 | asection *section; |
3438 | asection **input_list, **list; | |
986f0783 | 3439 | size_t amt; |
a3c62988 NC |
3440 | struct elf_metag_link_hash_table *htab = metag_link_hash_table (info); |
3441 | ||
3442 | /* Count the number of input BFDs and find the top input section id. */ | |
3443 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
3444 | input_bfd != NULL; | |
c72f2fb2 | 3445 | input_bfd = input_bfd->link.next) |
a3c62988 NC |
3446 | { |
3447 | bfd_count += 1; | |
3448 | for (section = input_bfd->sections; | |
3449 | section != NULL; | |
3450 | section = section->next) | |
3451 | { | |
3452 | if (top_id < section->id) | |
3453 | top_id = section->id; | |
3454 | } | |
3455 | } | |
3456 | ||
3457 | htab->bfd_count = bfd_count; | |
3458 | ||
3459 | amt = sizeof (struct map_stub) * (top_id + 1); | |
3460 | htab->stub_group = bfd_zmalloc (amt); | |
3461 | if (htab->stub_group == NULL) | |
3462 | return -1; | |
3463 | ||
3464 | /* We can't use output_bfd->section_count here to find the top output | |
3465 | section index as some sections may have been removed, and | |
3466 | strip_excluded_output_sections doesn't renumber the indices. */ | |
3467 | for (section = output_bfd->sections, top_index = 0; | |
3468 | section != NULL; | |
3469 | section = section->next) | |
3470 | { | |
3471 | if (top_index < section->index) | |
3472 | top_index = section->index; | |
3473 | } | |
3474 | ||
3475 | htab->top_index = top_index; | |
3476 | amt = sizeof (asection *) * (top_index + 1); | |
3477 | input_list = bfd_malloc (amt); | |
3478 | htab->input_list = input_list; | |
3479 | if (input_list == NULL) | |
3480 | return -1; | |
3481 | ||
3482 | /* For sections we aren't interested in, mark their entries with a | |
3483 | value we can check later. */ | |
3484 | list = input_list + top_index; | |
3485 | do | |
3486 | *list = bfd_abs_section_ptr; | |
3487 | while (list-- != input_list); | |
3488 | ||
3489 | for (section = output_bfd->sections; | |
3490 | section != NULL; | |
3491 | section = section->next) | |
3492 | { | |
3493 | /* FIXME: This is a bit of hack. Currently our .ctors and .dtors | |
3494 | * have PC relative relocs in them but no code flag set. */ | |
3495 | if (((section->flags & SEC_CODE) != 0) || | |
3496 | strcmp(".ctors", section->name) || | |
3497 | strcmp(".dtors", section->name)) | |
3498 | input_list[section->index] = NULL; | |
3499 | } | |
3500 | ||
3501 | return 1; | |
3502 | } | |
3503 | ||
3504 | /* The linker repeatedly calls this function for each input section, | |
3505 | in the order that input sections are linked into output sections. | |
3506 | Build lists of input sections to determine groupings between which | |
3507 | we may insert linker stubs. */ | |
3508 | ||
3509 | void | |
3510 | elf_metag_next_input_section (struct bfd_link_info *info, asection *isec) | |
3511 | { | |
3512 | struct elf_metag_link_hash_table *htab = metag_link_hash_table (info); | |
3513 | ||
3514 | if (isec->output_section->index <= htab->top_index) | |
3515 | { | |
3516 | asection **list = htab->input_list + isec->output_section->index; | |
3517 | if (*list != bfd_abs_section_ptr) | |
3518 | { | |
3519 | /* Steal the link_sec pointer for our list. */ | |
3520 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) | |
3521 | /* This happens to make the list in reverse order, | |
3522 | which is what we want. */ | |
3523 | PREV_SEC (isec) = *list; | |
3524 | *list = isec; | |
3525 | } | |
3526 | } | |
3527 | } | |
3528 | ||
3529 | /* See whether we can group stub sections together. Grouping stub | |
3530 | sections may result in fewer stubs. More importantly, we need to | |
3531 | put all .init* and .fini* stubs at the beginning of the .init or | |
3532 | .fini output sections respectively, because glibc splits the | |
3533 | _init and _fini functions into multiple parts. Putting a stub in | |
3534 | the middle of a function is not a good idea. */ | |
3535 | ||
3536 | static void | |
3537 | group_sections (struct elf_metag_link_hash_table *htab, | |
3538 | bfd_size_type stub_group_size, | |
3539 | bfd_boolean stubs_always_before_branch) | |
3540 | { | |
3541 | asection **list = htab->input_list + htab->top_index; | |
3542 | do | |
3543 | { | |
3544 | asection *tail = *list; | |
3545 | if (tail == bfd_abs_section_ptr) | |
3546 | continue; | |
3547 | while (tail != NULL) | |
3548 | { | |
3549 | asection *curr; | |
3550 | asection *prev; | |
3551 | bfd_size_type total; | |
3552 | bfd_boolean big_sec; | |
3553 | ||
3554 | curr = tail; | |
3555 | total = tail->size; | |
3556 | big_sec = total >= stub_group_size; | |
3557 | ||
3558 | while ((prev = PREV_SEC (curr)) != NULL | |
3559 | && ((total += curr->output_offset - prev->output_offset) | |
3560 | < stub_group_size)) | |
3561 | curr = prev; | |
3562 | ||
3563 | /* OK, the size from the start of CURR to the end is less | |
3564 | than stub_group_size bytes and thus can be handled by one stub | |
3565 | section. (or the tail section is itself larger than | |
3566 | stub_group_size bytes, in which case we may be toast.) | |
3567 | We should really be keeping track of the total size of | |
3568 | stubs added here, as stubs contribute to the final output | |
3569 | section size. */ | |
3570 | do | |
3571 | { | |
3572 | prev = PREV_SEC (tail); | |
3573 | /* Set up this stub group. */ | |
3574 | htab->stub_group[tail->id].link_sec = curr; | |
3575 | } | |
3576 | while (tail != curr && (tail = prev) != NULL); | |
3577 | ||
3578 | /* But wait, there's more! Input sections up to stub_group_size | |
3579 | bytes before the stub section can be handled by it too. | |
3580 | Don't do this if we have a really large section after the | |
3581 | stubs, as adding more stubs increases the chance that | |
3582 | branches may not reach into the stub section. */ | |
3583 | if (!stubs_always_before_branch && !big_sec) | |
3584 | { | |
3585 | total = 0; | |
3586 | while (prev != NULL | |
3587 | && ((total += tail->output_offset - prev->output_offset) | |
3588 | < stub_group_size)) | |
3589 | { | |
3590 | tail = prev; | |
3591 | prev = PREV_SEC (tail); | |
3592 | htab->stub_group[tail->id].link_sec = curr; | |
3593 | } | |
3594 | } | |
3595 | tail = prev; | |
3596 | } | |
3597 | } | |
3598 | while (list-- != htab->input_list); | |
3599 | free (htab->input_list); | |
3600 | #undef PREV_SEC | |
3601 | } | |
3602 | ||
3603 | /* Read in all local syms for all input bfds. | |
3604 | Returns -1 on error, 0 otherwise. */ | |
3605 | ||
3606 | static int | |
3607 | get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd, | |
3608 | struct bfd_link_info *info) | |
3609 | { | |
3610 | unsigned int bfd_indx; | |
3611 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
3612 | int stub_changed = 0; | |
3613 | struct elf_metag_link_hash_table *htab = metag_link_hash_table (info); | |
3614 | ||
3615 | /* We want to read in symbol extension records only once. To do this | |
3616 | we need to read in the local symbols in parallel and save them for | |
3617 | later use; so hold pointers to the local symbols in an array. */ | |
986f0783 | 3618 | size_t amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; |
a3c62988 NC |
3619 | all_local_syms = bfd_zmalloc (amt); |
3620 | htab->all_local_syms = all_local_syms; | |
3621 | if (all_local_syms == NULL) | |
3622 | return -1; | |
3623 | ||
3624 | /* Walk over all the input BFDs, swapping in local symbols. */ | |
3625 | for (bfd_indx = 0; | |
3626 | input_bfd != NULL; | |
c72f2fb2 | 3627 | input_bfd = input_bfd->link.next, bfd_indx++) |
a3c62988 NC |
3628 | { |
3629 | Elf_Internal_Shdr *symtab_hdr; | |
3630 | ||
3631 | /* We'll need the symbol table in a second. */ | |
3632 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
3633 | if (symtab_hdr->sh_info == 0) | |
3634 | continue; | |
3635 | ||
3636 | /* We need an array of the local symbols attached to the input bfd. */ | |
3637 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
3638 | if (local_syms == NULL) | |
3639 | { | |
3640 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
3641 | symtab_hdr->sh_info, 0, | |
3642 | NULL, NULL, NULL); | |
3643 | /* Cache them for elf_link_input_bfd. */ | |
3644 | symtab_hdr->contents = (unsigned char *) local_syms; | |
3645 | } | |
3646 | if (local_syms == NULL) | |
3647 | return -1; | |
3648 | ||
3649 | all_local_syms[bfd_indx] = local_syms; | |
3650 | } | |
3651 | ||
3652 | return stub_changed; | |
3653 | } | |
3654 | ||
3655 | /* Determine and set the size of the stub section for a final link. | |
3656 | ||
3657 | The basic idea here is to examine all the relocations looking for | |
3658 | PC-relative calls to a target that is unreachable with a "CALLR" | |
3659 | instruction. */ | |
3660 | ||
3661 | /* See elf32-hppa.c and elf64-ppc.c. */ | |
3662 | ||
3663 | bfd_boolean | |
3664 | elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd, | |
3665 | struct bfd_link_info *info, | |
3666 | bfd_signed_vma group_size, | |
3667 | asection * (*add_stub_section) (const char *, asection *), | |
3668 | void (*layout_sections_again) (void)) | |
3669 | { | |
3670 | bfd_size_type stub_group_size; | |
3671 | bfd_boolean stubs_always_before_branch; | |
3672 | bfd_boolean stub_changed; | |
3673 | struct elf_metag_link_hash_table *htab = metag_link_hash_table (info); | |
3674 | ||
3675 | /* Stash our params away. */ | |
3676 | htab->stub_bfd = stub_bfd; | |
3677 | htab->add_stub_section = add_stub_section; | |
3678 | htab->layout_sections_again = layout_sections_again; | |
3679 | stubs_always_before_branch = group_size < 0; | |
3680 | if (group_size < 0) | |
3681 | stub_group_size = -group_size; | |
3682 | else | |
3683 | stub_group_size = group_size; | |
3684 | if (stub_group_size == 1) | |
3685 | { | |
3686 | /* Default values. */ | |
3687 | /* FIXME: not sure what these values should be */ | |
3688 | if (stubs_always_before_branch) | |
3689 | { | |
3690 | stub_group_size = (1 << BRANCH_BITS); | |
3691 | } | |
3692 | else | |
3693 | { | |
3694 | stub_group_size = (1 << BRANCH_BITS); | |
3695 | } | |
3696 | } | |
3697 | ||
3698 | group_sections (htab, stub_group_size, stubs_always_before_branch); | |
3699 | ||
3700 | switch (get_local_syms (output_bfd, info->input_bfds, info)) | |
3701 | { | |
3702 | default: | |
3703 | if (htab->all_local_syms) | |
3704 | goto error_ret_free_local; | |
3705 | return FALSE; | |
3706 | ||
3707 | case 0: | |
3708 | stub_changed = FALSE; | |
3709 | break; | |
3710 | ||
3711 | case 1: | |
3712 | stub_changed = TRUE; | |
3713 | break; | |
3714 | } | |
3715 | ||
3716 | while (1) | |
3717 | { | |
3718 | bfd *input_bfd; | |
3719 | unsigned int bfd_indx; | |
3720 | asection *stub_sec; | |
3721 | ||
3722 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
3723 | input_bfd != NULL; | |
c72f2fb2 | 3724 | input_bfd = input_bfd->link.next, bfd_indx++) |
a3c62988 NC |
3725 | { |
3726 | Elf_Internal_Shdr *symtab_hdr; | |
3727 | asection *section; | |
3728 | Elf_Internal_Sym *local_syms; | |
3729 | ||
3730 | /* We'll need the symbol table in a second. */ | |
3731 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
3732 | if (symtab_hdr->sh_info == 0) | |
3733 | continue; | |
3734 | ||
3735 | local_syms = htab->all_local_syms[bfd_indx]; | |
3736 | ||
3737 | /* Walk over each section attached to the input bfd. */ | |
3738 | for (section = input_bfd->sections; | |
3739 | section != NULL; | |
3740 | section = section->next) | |
3741 | { | |
3742 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
3743 | ||
3744 | /* If there aren't any relocs, then there's nothing more | |
3745 | to do. */ | |
3746 | if ((section->flags & SEC_RELOC) == 0 | |
3747 | || section->reloc_count == 0) | |
3748 | continue; | |
3749 | ||
3750 | /* If this section is a link-once section that will be | |
3751 | discarded, then don't create any stubs. */ | |
3752 | if (section->output_section == NULL | |
3753 | || section->output_section->owner != output_bfd) | |
3754 | continue; | |
3755 | ||
3756 | /* Get the relocs. */ | |
3757 | internal_relocs | |
3758 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, | |
3759 | info->keep_memory); | |
3760 | if (internal_relocs == NULL) | |
3761 | goto error_ret_free_local; | |
3762 | ||
3763 | /* Now examine each relocation. */ | |
3764 | irela = internal_relocs; | |
3765 | irelaend = irela + section->reloc_count; | |
3766 | for (; irela < irelaend; irela++) | |
3767 | { | |
3768 | unsigned int r_type, r_indx; | |
3769 | enum elf_metag_stub_type stub_type; | |
3770 | struct elf_metag_stub_hash_entry *hsh; | |
3771 | asection *sym_sec; | |
3772 | bfd_vma sym_value; | |
3773 | bfd_vma destination; | |
3774 | struct elf_metag_link_hash_entry *hh; | |
3775 | char *stub_name; | |
3776 | const asection *id_sec; | |
3777 | ||
3778 | r_type = ELF32_R_TYPE (irela->r_info); | |
3779 | r_indx = ELF32_R_SYM (irela->r_info); | |
3780 | ||
3781 | if (r_type >= (unsigned int) R_METAG_MAX) | |
3782 | { | |
3783 | bfd_set_error (bfd_error_bad_value); | |
3784 | error_ret_free_internal: | |
3785 | if (elf_section_data (section)->relocs == NULL) | |
3786 | free (internal_relocs); | |
3787 | goto error_ret_free_local; | |
3788 | } | |
3789 | ||
3790 | /* Only look for stubs on CALLR and B instructions. */ | |
3791 | if (!(r_type == (unsigned int) R_METAG_RELBRANCH || | |
3792 | r_type == (unsigned int) R_METAG_RELBRANCH_PLT)) | |
3793 | continue; | |
3794 | ||
3795 | /* Now determine the call target, its name, value, | |
3796 | section. */ | |
3797 | sym_sec = NULL; | |
3798 | sym_value = 0; | |
3799 | destination = 0; | |
3800 | hh = NULL; | |
3801 | if (r_indx < symtab_hdr->sh_info) | |
3802 | { | |
3803 | /* It's a local symbol. */ | |
3804 | Elf_Internal_Sym *sym; | |
3805 | Elf_Internal_Shdr *hdr; | |
3806 | unsigned int shndx; | |
3807 | ||
3808 | sym = local_syms + r_indx; | |
3809 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
3810 | sym_value = sym->st_value; | |
3811 | shndx = sym->st_shndx; | |
3812 | if (shndx < elf_numsections (input_bfd)) | |
3813 | { | |
3814 | hdr = elf_elfsections (input_bfd)[shndx]; | |
3815 | sym_sec = hdr->bfd_section; | |
3816 | destination = (sym_value + irela->r_addend | |
3817 | + sym_sec->output_offset | |
3818 | + sym_sec->output_section->vma); | |
3819 | } | |
3820 | } | |
3821 | else | |
3822 | { | |
3823 | /* It's an external symbol. */ | |
3824 | int e_indx; | |
3825 | ||
3826 | e_indx = r_indx - symtab_hdr->sh_info; | |
3827 | hh = ((struct elf_metag_link_hash_entry *) | |
3828 | elf_sym_hashes (input_bfd)[e_indx]); | |
3829 | ||
3830 | while (hh->eh.root.type == bfd_link_hash_indirect | |
3831 | || hh->eh.root.type == bfd_link_hash_warning) | |
3832 | hh = ((struct elf_metag_link_hash_entry *) | |
3833 | hh->eh.root.u.i.link); | |
3834 | ||
3835 | if (hh->eh.root.type == bfd_link_hash_defined | |
3836 | || hh->eh.root.type == bfd_link_hash_defweak) | |
3837 | { | |
3838 | sym_sec = hh->eh.root.u.def.section; | |
3839 | sym_value = hh->eh.root.u.def.value; | |
3840 | if (hh->eh.plt.offset != (bfd_vma) -1 | |
3841 | && hh->eh.dynindx != -1 | |
3842 | && r_type == (unsigned int) R_METAG_RELBRANCH_PLT) | |
3843 | { | |
ce558b89 | 3844 | sym_sec = htab->etab.splt; |
a3c62988 NC |
3845 | sym_value = hh->eh.plt.offset; |
3846 | } | |
3847 | ||
3848 | if (sym_sec->output_section != NULL) | |
3849 | destination = (sym_value + irela->r_addend | |
3850 | + sym_sec->output_offset | |
3851 | + sym_sec->output_section->vma); | |
3852 | else | |
3853 | continue; | |
3854 | } | |
3855 | else if (hh->eh.root.type == bfd_link_hash_undefweak) | |
3856 | { | |
0e1862bb | 3857 | if (! bfd_link_pic (info)) |
a3c62988 NC |
3858 | continue; |
3859 | } | |
3860 | else if (hh->eh.root.type == bfd_link_hash_undefined) | |
3861 | { | |
3862 | if (! (info->unresolved_syms_in_objects == RM_IGNORE | |
3863 | && (ELF_ST_VISIBILITY (hh->eh.other) | |
3864 | == STV_DEFAULT))) | |
3865 | continue; | |
3866 | } | |
3867 | else | |
3868 | { | |
3869 | bfd_set_error (bfd_error_bad_value); | |
3870 | goto error_ret_free_internal; | |
3871 | } | |
3872 | } | |
3873 | ||
3874 | /* Determine what (if any) linker stub is needed. */ | |
3875 | stub_type = metag_type_of_stub (section, irela, hh, | |
3876 | destination, info); | |
3877 | if (stub_type == metag_stub_none) | |
3878 | continue; | |
3879 | ||
3880 | /* Support for grouping stub sections. */ | |
3881 | id_sec = htab->stub_group[section->id].link_sec; | |
3882 | ||
3883 | /* Get the name of this stub. */ | |
3884 | stub_name = metag_stub_name (id_sec, sym_sec, hh, irela); | |
3885 | if (!stub_name) | |
3886 | goto error_ret_free_internal; | |
3887 | ||
3888 | hsh = metag_stub_hash_lookup (&htab->bstab, | |
3889 | stub_name, | |
3890 | FALSE, FALSE); | |
3891 | if (hsh != NULL) | |
3892 | { | |
3893 | /* The proper stub has already been created. */ | |
3894 | free (stub_name); | |
3895 | continue; | |
3896 | } | |
3897 | ||
3898 | hsh = metag_add_stub (stub_name, section, htab); | |
3899 | if (hsh == NULL) | |
3900 | { | |
3901 | free (stub_name); | |
3902 | goto error_ret_free_internal; | |
3903 | } | |
3904 | hsh->target_value = sym_value; | |
3905 | hsh->target_section = sym_sec; | |
3906 | hsh->stub_type = stub_type; | |
3907 | hsh->hh = hh; | |
3908 | hsh->addend = irela->r_addend; | |
3909 | stub_changed = TRUE; | |
3910 | } | |
3911 | ||
3912 | /* We're done with the internal relocs, free them. */ | |
3913 | if (elf_section_data (section)->relocs == NULL) | |
3914 | free (internal_relocs); | |
3915 | } | |
3916 | } | |
3917 | ||
3918 | if (!stub_changed) | |
3919 | break; | |
3920 | ||
3921 | /* OK, we've added some stubs. Find out the new size of the | |
3922 | stub sections. */ | |
3923 | for (stub_sec = htab->stub_bfd->sections; | |
3924 | stub_sec != NULL; | |
3925 | stub_sec = stub_sec->next) | |
3926 | stub_sec->size = 0; | |
3927 | ||
3928 | bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab); | |
3929 | ||
3930 | /* Ask the linker to do its stuff. */ | |
3931 | (*htab->layout_sections_again) (); | |
3932 | stub_changed = FALSE; | |
3933 | } | |
3934 | ||
3935 | free (htab->all_local_syms); | |
3936 | return TRUE; | |
3937 | ||
3938 | error_ret_free_local: | |
3939 | free (htab->all_local_syms); | |
3940 | return FALSE; | |
3941 | } | |
3942 | ||
3943 | /* Build all the stubs associated with the current output file. The | |
3944 | stubs are kept in a hash table attached to the main linker hash | |
3945 | table. This function is called via metagelf_finish in the linker. */ | |
3946 | ||
3947 | bfd_boolean | |
3948 | elf_metag_build_stubs (struct bfd_link_info *info) | |
3949 | { | |
3950 | asection *stub_sec; | |
3951 | struct bfd_hash_table *table; | |
3952 | struct elf_metag_link_hash_table *htab; | |
3953 | ||
3954 | htab = metag_link_hash_table (info); | |
3955 | ||
3956 | for (stub_sec = htab->stub_bfd->sections; | |
3957 | stub_sec != NULL; | |
3958 | stub_sec = stub_sec->next) | |
3959 | { | |
3960 | bfd_size_type size; | |
3961 | ||
3962 | /* Allocate memory to hold the linker stubs. */ | |
3963 | size = stub_sec->size; | |
3964 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); | |
3965 | if (stub_sec->contents == NULL && size != 0) | |
3966 | return FALSE; | |
3967 | stub_sec->size = 0; | |
3968 | } | |
3969 | ||
3970 | /* Build the stubs as directed by the stub hash table. */ | |
3971 | table = &htab->bstab; | |
3972 | bfd_hash_traverse (table, metag_build_one_stub, info); | |
3973 | ||
3974 | return TRUE; | |
3975 | } | |
3976 | ||
3977 | /* Return TRUE if SYM represents a local label symbol. */ | |
3978 | ||
3979 | static bfd_boolean | |
3980 | elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name) | |
3981 | { | |
3982 | if (name[0] == '$' && name[1] == 'L') | |
3983 | return 1; | |
3984 | return _bfd_elf_is_local_label_name (abfd, name); | |
3985 | } | |
3986 | ||
3987 | /* Return address for Ith PLT stub in section PLT, for relocation REL | |
3988 | or (bfd_vma) -1 if it should not be included. */ | |
3989 | ||
3990 | static bfd_vma | |
3991 | elf_metag_plt_sym_val (bfd_vma i, const asection *plt, | |
3992 | const arelent *rel ATTRIBUTE_UNUSED) | |
3993 | { | |
3994 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; | |
3995 | } | |
3996 | ||
3997 | #define ELF_ARCH bfd_arch_metag | |
3998 | #define ELF_TARGET_ID METAG_ELF_DATA | |
3999 | #define ELF_MACHINE_CODE EM_METAG | |
4000 | #define ELF_MINPAGESIZE 0x1000 | |
4001 | #define ELF_MAXPAGESIZE 0x4000 | |
4002 | #define ELF_COMMONPAGESIZE 0x1000 | |
4003 | ||
6d00b590 | 4004 | #define TARGET_LITTLE_SYM metag_elf32_vec |
a3c62988 NC |
4005 | #define TARGET_LITTLE_NAME "elf32-metag" |
4006 | ||
4007 | #define elf_symbol_leading_char '_' | |
4008 | ||
4009 | #define elf_info_to_howto_rel NULL | |
4010 | #define elf_info_to_howto metag_info_to_howto_rela | |
4011 | ||
4012 | #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name | |
4013 | #define bfd_elf32_bfd_link_hash_table_create \ | |
4014 | elf_metag_link_hash_table_create | |
a3c62988 NC |
4015 | #define elf_backend_relocate_section elf_metag_relocate_section |
4016 | #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook | |
a3c62988 NC |
4017 | #define elf_backend_check_relocs elf_metag_check_relocs |
4018 | #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections | |
4019 | #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol | |
4020 | #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol | |
4021 | #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections | |
4022 | #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections | |
4023 | #define elf_backend_omit_section_dynsym \ | |
d00dd7dc | 4024 | _bfd_elf_omit_section_dynsym_all |
ed7e9d0b | 4025 | #define elf_backend_init_file_header elf_metag_init_file_header |
a3c62988 NC |
4026 | #define elf_backend_reloc_type_class elf_metag_reloc_type_class |
4027 | #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol | |
4028 | #define elf_backend_plt_sym_val elf_metag_plt_sym_val | |
4029 | ||
4030 | #define elf_backend_can_gc_sections 1 | |
4031 | #define elf_backend_can_refcount 1 | |
ce558b89 AM |
4032 | #define elf_backend_rela_normal 1 |
4033 | #define elf_backend_want_got_plt 1 | |
a3c62988 NC |
4034 | #define elf_backend_want_got_sym 0 |
4035 | #define elf_backend_want_plt_sym 0 | |
4036 | #define elf_backend_plt_readonly 1 | |
64f52338 | 4037 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 4038 | #define elf_backend_want_dynrelro 1 |
a3c62988 NC |
4039 | |
4040 | #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup | |
4041 | #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup | |
4042 | ||
4043 | #include "elf32-target.h" |