Commit | Line | Data |
---|---|---|
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 | /* Small local sym cache. */ |
827 | struct sym_cache sym_cache; | |
828 | ||
829 | /* Data for LDM relocations. */ | |
830 | union | |
831 | { | |
832 | bfd_signed_vma refcount; | |
833 | bfd_vma offset; | |
834 | } tls_ldm_got; | |
835 | }; | |
836 | ||
837 | /* Return the base vma address which should be subtracted from the | |
838 | real address when resolving a dtpoff relocation. This is PT_TLS | |
839 | segment p_vaddr. */ | |
840 | static bfd_vma | |
841 | dtpoff_base (struct bfd_link_info *info) | |
842 | { | |
843 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
844 | if (elf_hash_table (info)->tls_sec == NULL) | |
845 | return 0; | |
846 | return elf_hash_table (info)->tls_sec->vma; | |
847 | } | |
848 | ||
849 | /* Return the relocation value for R_METAG_TLS_IE */ | |
850 | static bfd_vma | |
851 | tpoff (struct bfd_link_info *info, bfd_vma address) | |
852 | { | |
853 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
854 | if (elf_hash_table (info)->tls_sec == NULL) | |
855 | return 0; | |
856 | /* METAG TLS ABI is variant I and static TLS blocks start just after | |
857 | tcbhead structure which has 2 pointer fields. */ | |
858 | return (address - elf_hash_table (info)->tls_sec->vma | |
859 | + align_power ((bfd_vma) 8, | |
860 | elf_hash_table (info)->tls_sec->alignment_power)); | |
861 | } | |
862 | ||
f3185997 | 863 | static bfd_boolean |
0aa13fee | 864 | metag_info_to_howto_rela (bfd *abfd, |
a3c62988 NC |
865 | arelent *cache_ptr, |
866 | Elf_Internal_Rela *dst) | |
867 | { | |
868 | unsigned int r_type; | |
869 | ||
870 | r_type = ELF32_R_TYPE (dst->r_info); | |
5860e3f8 NC |
871 | if (r_type >= (unsigned int) R_METAG_MAX) |
872 | { | |
695344c0 | 873 | /* xgettext:c-format */ |
0aa13fee AM |
874 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
875 | abfd, r_type); | |
f3185997 NC |
876 | bfd_set_error (bfd_error_bad_value); |
877 | return FALSE; | |
5860e3f8 | 878 | } |
a3c62988 | 879 | cache_ptr->howto = & elf_metag_howto_table [r_type]; |
f3185997 | 880 | return TRUE; |
a3c62988 NC |
881 | } |
882 | ||
883 | static reloc_howto_type * | |
884 | metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, | |
885 | bfd_reloc_code_real_type code) | |
886 | { | |
887 | unsigned int i; | |
888 | ||
889 | for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++) | |
890 | if (metag_reloc_map [i].bfd_reloc_val == code) | |
891 | return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val]; | |
892 | ||
893 | return NULL; | |
894 | } | |
895 | ||
896 | static reloc_howto_type * | |
897 | metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
898 | const char *r_name) | |
899 | { | |
900 | unsigned int i; | |
901 | ||
902 | for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++) | |
903 | if (elf_metag_howto_table[i].name != NULL | |
904 | && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0) | |
905 | return &elf_metag_howto_table[i]; | |
906 | ||
907 | return NULL; | |
908 | } | |
909 | ||
910 | /* Various hash macros and functions. */ | |
911 | #define metag_link_hash_table(p) \ | |
912 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ | |
913 | == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL) | |
914 | ||
915 | #define metag_elf_hash_entry(ent) \ | |
916 | ((struct elf_metag_link_hash_entry *)(ent)) | |
917 | ||
918 | #define metag_stub_hash_entry(ent) \ | |
919 | ((struct elf_metag_stub_hash_entry *)(ent)) | |
920 | ||
921 | #define metag_stub_hash_lookup(table, string, create, copy) \ | |
922 | ((struct elf_metag_stub_hash_entry *) \ | |
923 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
924 | ||
925 | #define metag_elf_local_got_tls_type(abfd) \ | |
926 | ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info))) | |
927 | ||
928 | /* Assorted hash table functions. */ | |
929 | ||
930 | /* Initialize an entry in the stub hash table. */ | |
931 | ||
932 | static struct bfd_hash_entry * | |
933 | stub_hash_newfunc (struct bfd_hash_entry *entry, | |
934 | struct bfd_hash_table *table, | |
935 | const char *string) | |
936 | { | |
937 | /* Allocate the structure if it has not already been allocated by a | |
938 | subclass. */ | |
939 | if (entry == NULL) | |
940 | { | |
941 | entry = bfd_hash_allocate (table, | |
942 | sizeof (struct elf_metag_stub_hash_entry)); | |
943 | if (entry == NULL) | |
944 | return entry; | |
945 | } | |
946 | ||
947 | /* Call the allocation method of the superclass. */ | |
948 | entry = bfd_hash_newfunc (entry, table, string); | |
949 | if (entry != NULL) | |
950 | { | |
951 | struct elf_metag_stub_hash_entry *hsh; | |
952 | ||
953 | /* Initialize the local fields. */ | |
954 | hsh = (struct elf_metag_stub_hash_entry *) entry; | |
955 | hsh->stub_sec = NULL; | |
956 | hsh->stub_offset = 0; | |
957 | hsh->target_value = 0; | |
958 | hsh->target_section = NULL; | |
959 | hsh->stub_type = metag_stub_long_branch; | |
960 | hsh->hh = NULL; | |
961 | hsh->id_sec = NULL; | |
962 | } | |
963 | ||
964 | return entry; | |
965 | } | |
966 | ||
967 | /* Initialize an entry in the link hash table. */ | |
968 | ||
969 | static struct bfd_hash_entry * | |
970 | metag_link_hash_newfunc (struct bfd_hash_entry *entry, | |
971 | struct bfd_hash_table *table, | |
972 | const char *string) | |
973 | { | |
974 | /* Allocate the structure if it has not already been allocated by a | |
975 | subclass. */ | |
976 | if (entry == NULL) | |
977 | { | |
978 | entry = bfd_hash_allocate (table, | |
979 | sizeof (struct elf_metag_link_hash_entry)); | |
980 | if (entry == NULL) | |
981 | return entry; | |
982 | } | |
983 | ||
984 | /* Call the allocation method of the superclass. */ | |
985 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
986 | if (entry != NULL) | |
987 | { | |
988 | struct elf_metag_link_hash_entry *hh; | |
989 | ||
990 | /* Initialize the local fields. */ | |
991 | hh = (struct elf_metag_link_hash_entry *) entry; | |
992 | hh->hsh_cache = NULL; | |
a3c62988 NC |
993 | hh->tls_type = GOT_UNKNOWN; |
994 | } | |
995 | ||
996 | return entry; | |
997 | } | |
998 | ||
68faa637 AM |
999 | /* Free the derived linker hash table. */ |
1000 | ||
1001 | static void | |
d495ab0d | 1002 | elf_metag_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1003 | { |
1004 | struct elf_metag_link_hash_table *htab | |
d495ab0d | 1005 | = (struct elf_metag_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1006 | |
1007 | bfd_hash_table_free (&htab->bstab); | |
d495ab0d | 1008 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1009 | } |
1010 | ||
a3c62988 NC |
1011 | /* Create the derived linker hash table. The Meta ELF port uses the derived |
1012 | hash table to keep information specific to the Meta ELF linker (without | |
1013 | using static variables). */ | |
1014 | ||
1015 | static struct bfd_link_hash_table * | |
1016 | elf_metag_link_hash_table_create (bfd *abfd) | |
1017 | { | |
1018 | struct elf_metag_link_hash_table *htab; | |
986f0783 | 1019 | size_t amt = sizeof (*htab); |
a3c62988 | 1020 | |
7bf52ea2 | 1021 | htab = bfd_zmalloc (amt); |
a3c62988 NC |
1022 | if (htab == NULL) |
1023 | return NULL; | |
1024 | ||
1025 | if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd, | |
1026 | metag_link_hash_newfunc, | |
1027 | sizeof (struct elf_metag_link_hash_entry), | |
1028 | METAG_ELF_DATA)) | |
1029 | { | |
1030 | free (htab); | |
1031 | return NULL; | |
1032 | } | |
1033 | ||
1034 | /* Init the stub hash table too. */ | |
1035 | if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc, | |
1036 | sizeof (struct elf_metag_stub_hash_entry))) | |
d495ab0d AM |
1037 | { |
1038 | _bfd_elf_link_hash_table_free (abfd); | |
1039 | return NULL; | |
1040 | } | |
1041 | htab->etab.root.hash_table_free = elf_metag_link_hash_table_free; | |
3084d7a2 | 1042 | htab->etab.dt_pltgot_required = TRUE; |
a3c62988 | 1043 | |
a3c62988 NC |
1044 | return &htab->etab.root; |
1045 | } | |
1046 | ||
a3c62988 NC |
1047 | /* Section name for stubs is the associated section name plus this |
1048 | string. */ | |
1049 | #define STUB_SUFFIX ".stub" | |
1050 | ||
1051 | /* Build a name for an entry in the stub hash table. */ | |
1052 | ||
1053 | static char * | |
1054 | metag_stub_name (const asection *input_section, | |
1055 | const asection *sym_sec, | |
1056 | const struct elf_metag_link_hash_entry *hh, | |
1057 | const Elf_Internal_Rela *rel) | |
1058 | { | |
1059 | char *stub_name; | |
1060 | bfd_size_type len; | |
1061 | ||
1062 | if (hh) | |
1063 | { | |
1064 | len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1; | |
1065 | stub_name = bfd_malloc (len); | |
1066 | if (stub_name != NULL) | |
1067 | { | |
1068 | sprintf (stub_name, "%08x_%s+%x", | |
1069 | input_section->id & 0xffffffff, | |
1070 | hh->eh.root.root.string, | |
1071 | (int) rel->r_addend & 0xffffffff); | |
1072 | } | |
1073 | } | |
1074 | else | |
1075 | { | |
1076 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; | |
1077 | stub_name = bfd_malloc (len); | |
1078 | if (stub_name != NULL) | |
1079 | { | |
1080 | sprintf (stub_name, "%08x_%x:%x+%x", | |
1081 | input_section->id & 0xffffffff, | |
1082 | sym_sec->id & 0xffffffff, | |
1083 | (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, | |
1084 | (int) rel->r_addend & 0xffffffff); | |
1085 | } | |
1086 | } | |
1087 | return stub_name; | |
1088 | } | |
1089 | ||
1090 | /* Look up an entry in the stub hash. Stub entries are cached because | |
1091 | creating the stub name takes a bit of time. */ | |
1092 | ||
1093 | static struct elf_metag_stub_hash_entry * | |
1094 | metag_get_stub_entry (const asection *input_section, | |
1095 | const asection *sym_sec, | |
1096 | struct elf_metag_link_hash_entry *hh, | |
1097 | const Elf_Internal_Rela *rel, | |
1098 | struct elf_metag_link_hash_table *htab) | |
1099 | { | |
1100 | struct elf_metag_stub_hash_entry *hsh; | |
1101 | const asection *id_sec; | |
1102 | ||
1103 | /* If this input section is part of a group of sections sharing one | |
1104 | stub section, then use the id of the first section in the group. | |
1105 | Stub names need to include a section id, as there may well be | |
1106 | more than one stub used to reach say, printf, and we need to | |
1107 | distinguish between them. */ | |
1108 | id_sec = htab->stub_group[input_section->id].link_sec; | |
1109 | ||
1110 | if (hh != NULL && hh->hsh_cache != NULL | |
1111 | && hh->hsh_cache->hh == hh | |
1112 | && hh->hsh_cache->id_sec == id_sec) | |
1113 | { | |
1114 | hsh = hh->hsh_cache; | |
1115 | } | |
1116 | else | |
1117 | { | |
1118 | char *stub_name; | |
1119 | ||
1120 | stub_name = metag_stub_name (id_sec, sym_sec, hh, rel); | |
1121 | if (stub_name == NULL) | |
1122 | return NULL; | |
1123 | ||
1124 | hsh = metag_stub_hash_lookup (&htab->bstab, | |
1125 | stub_name, FALSE, FALSE); | |
1126 | ||
1127 | if (hh != NULL) | |
1128 | hh->hsh_cache = hsh; | |
1129 | ||
1130 | free (stub_name); | |
1131 | } | |
1132 | ||
1133 | return hsh; | |
1134 | } | |
1135 | ||
1136 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
1137 | stub entry are initialised. */ | |
1138 | ||
1139 | static struct elf_metag_stub_hash_entry * | |
1140 | metag_add_stub (const char *stub_name, | |
1141 | asection *section, | |
1142 | struct elf_metag_link_hash_table *htab) | |
1143 | { | |
1144 | asection *link_sec; | |
1145 | asection *stub_sec; | |
1146 | struct elf_metag_stub_hash_entry *hsh; | |
1147 | ||
1148 | link_sec = htab->stub_group[section->id].link_sec; | |
1149 | stub_sec = htab->stub_group[section->id].stub_sec; | |
1150 | if (stub_sec == NULL) | |
1151 | { | |
1152 | stub_sec = htab->stub_group[link_sec->id].stub_sec; | |
1153 | if (stub_sec == NULL) | |
1154 | { | |
1155 | size_t namelen; | |
1156 | bfd_size_type len; | |
1157 | char *s_name; | |
1158 | ||
1159 | namelen = strlen (link_sec->name); | |
1160 | len = namelen + sizeof (STUB_SUFFIX); | |
1161 | s_name = bfd_alloc (htab->stub_bfd, len); | |
1162 | if (s_name == NULL) | |
1163 | return NULL; | |
1164 | ||
1165 | memcpy (s_name, link_sec->name, namelen); | |
1166 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); | |
1167 | ||
1168 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); | |
1169 | if (stub_sec == NULL) | |
1170 | return NULL; | |
1171 | htab->stub_group[link_sec->id].stub_sec = stub_sec; | |
1172 | } | |
1173 | htab->stub_group[section->id].stub_sec = stub_sec; | |
1174 | } | |
1175 | ||
1176 | /* Enter this entry into the linker stub hash table. */ | |
1177 | hsh = metag_stub_hash_lookup (&htab->bstab, stub_name, | |
1178 | TRUE, FALSE); | |
1179 | if (hsh == NULL) | |
1180 | { | |
695344c0 | 1181 | /* xgettext:c-format */ |
871b3ab2 | 1182 | _bfd_error_handler (_("%pB: cannot create stub entry %s"), |
4eca0228 | 1183 | section->owner, stub_name); |
a3c62988 NC |
1184 | return NULL; |
1185 | } | |
1186 | ||
1187 | hsh->stub_sec = stub_sec; | |
1188 | hsh->stub_offset = 0; | |
1189 | hsh->id_sec = link_sec; | |
1190 | return hsh; | |
1191 | } | |
1192 | ||
1193 | /* Check a signed integer value can be represented in the given number | |
1194 | of bits. */ | |
1195 | ||
1196 | static bfd_boolean | |
1197 | within_signed_range (int value, unsigned int bits) | |
1198 | { | |
1199 | int min_val = -(1 << (bits - 1)); | |
1200 | int max_val = (1 << (bits - 1)) - 1; | |
1201 | return (value <= max_val) && (value >= min_val); | |
1202 | } | |
1203 | ||
1204 | /* Perform a relocation as part of a final link. */ | |
1205 | ||
1206 | static bfd_reloc_status_type | |
1207 | metag_final_link_relocate (reloc_howto_type *howto, | |
1208 | bfd *input_bfd, | |
1209 | asection *input_section, | |
1210 | bfd_byte *contents, | |
1211 | Elf_Internal_Rela *rel, | |
1212 | bfd_vma relocation, | |
1213 | struct elf_metag_link_hash_entry *hh, | |
1214 | struct elf_metag_link_hash_table *htab, | |
1215 | asection *sym_sec) | |
1216 | { | |
1217 | bfd_reloc_status_type r = bfd_reloc_ok; | |
1218 | bfd_byte *hit_data = contents + rel->r_offset; | |
1219 | int opcode, op_shift, op_extended, l1, l2; | |
1220 | bfd_signed_vma srel, addend = rel->r_addend; | |
1221 | struct elf_metag_stub_hash_entry *hsh = NULL; | |
1222 | bfd_vma location; | |
1223 | ||
1224 | /* Find out where we are and where we're going. */ | |
1225 | location = (rel->r_offset + | |
1226 | input_section->output_offset + | |
1227 | input_section->output_section->vma); | |
1228 | ||
1229 | switch (howto->type) | |
1230 | { | |
1231 | case R_METAG_RELBRANCH: | |
1232 | case R_METAG_RELBRANCH_PLT: | |
1233 | /* Make it a pc relative offset. */ | |
1234 | relocation -= location; | |
1235 | break; | |
1236 | case R_METAG_TLS_GD: | |
1237 | case R_METAG_TLS_IE: | |
1238 | relocation -= elf_gp (input_section->output_section->owner); | |
1239 | break; | |
1240 | default: | |
1241 | break; | |
1242 | } | |
1243 | ||
1244 | switch (howto->type) | |
1245 | { | |
1246 | case R_METAG_RELBRANCH_PLT: | |
1247 | case R_METAG_RELBRANCH: | |
1248 | opcode = bfd_get_32 (input_bfd, hit_data); | |
1249 | ||
1250 | srel = (bfd_signed_vma) relocation; | |
1251 | srel += addend; | |
1252 | ||
1253 | /* If the branch is out of reach, then redirect the | |
1254 | call to the local stub for this function. */ | |
1255 | if (srel > ((1 << (BRANCH_BITS + 1)) - 1) || | |
1256 | (srel < - (1 << (BRANCH_BITS + 1)))) | |
1257 | { | |
1258 | if (sym_sec == NULL) | |
1259 | break; | |
1260 | ||
1261 | hsh = metag_get_stub_entry (input_section, sym_sec, | |
1262 | hh, rel, htab); | |
1263 | if (hsh == NULL) | |
1264 | return bfd_reloc_undefined; | |
1265 | ||
1266 | /* Munge up the value and addend so that we call the stub | |
1267 | rather than the procedure directly. */ | |
1268 | srel = (hsh->stub_offset | |
1269 | + hsh->stub_sec->output_offset | |
1270 | + hsh->stub_sec->output_section->vma); | |
1271 | srel -= location; | |
1272 | } | |
1273 | ||
1274 | srel = srel >> 2; | |
1275 | ||
1276 | if (!within_signed_range (srel, BRANCH_BITS)) | |
1277 | { | |
1278 | if (hh && hh->eh.root.type == bfd_link_hash_undefweak) | |
1279 | srel = 0; | |
1280 | else | |
1281 | return bfd_reloc_overflow; | |
1282 | } | |
1283 | ||
1284 | opcode &= ~(0x7ffff << 5); | |
1285 | opcode |= ((srel & 0x7ffff) << 5); | |
1286 | ||
1287 | bfd_put_32 (input_bfd, opcode, hit_data); | |
1288 | break; | |
1289 | case R_METAG_GETSETOFF: | |
1290 | case R_METAG_GETSET_GOT: | |
1291 | case R_METAG_GETSET_GOTOFF: | |
1292 | opcode = bfd_get_32 (input_bfd, hit_data); | |
1293 | ||
1294 | srel = (bfd_signed_vma) relocation; | |
1295 | srel += addend; | |
1296 | ||
1297 | /* Is this a standard or extended GET/SET? */ | |
1298 | if ((opcode & 0xf0000000) == 0xa0000000) | |
1299 | { | |
1300 | /* Extended GET/SET. */ | |
1301 | l1 = opcode & 0x2; | |
1302 | l2 = opcode & 0x4; | |
1303 | op_extended = 1; | |
1304 | } | |
1305 | else | |
1306 | { | |
1307 | /* Standard GET/SET. */ | |
1308 | l1 = opcode & 0x01000000; | |
1309 | l2 = opcode & 0x04000000; | |
1310 | op_extended = 0; | |
1311 | } | |
1312 | ||
1313 | /* Calculate the width of the GET/SET and how much we need to | |
1314 | shift the result by. */ | |
1315 | if (l2) | |
1316 | if (l1) | |
1317 | op_shift = 3; | |
1318 | else | |
1319 | op_shift = 2; | |
1320 | else | |
1321 | if (l1) | |
1322 | op_shift = 1; | |
1323 | else | |
1324 | op_shift = 0; | |
1325 | ||
1326 | /* GET/SET offsets are scaled by the width of the transfer. */ | |
1327 | srel = srel >> op_shift; | |
1328 | ||
1329 | /* Extended GET/SET has signed 12 bits of offset, standard has | |
1330 | signed 6 bits. */ | |
1331 | if (op_extended) | |
1332 | { | |
1333 | if (!within_signed_range (srel, 12)) | |
1334 | { | |
1335 | if (hh && hh->eh.root.type == bfd_link_hash_undefweak) | |
1336 | srel = 0; | |
1337 | else | |
1338 | return bfd_reloc_overflow; | |
1339 | } | |
1340 | opcode &= ~(0xfff << 7); | |
1341 | opcode |= ((srel & 0xfff) << 7); | |
1342 | } | |
1343 | else | |
1344 | { | |
1345 | if (!within_signed_range (srel, 5)) | |
1346 | { | |
1347 | if (hh && hh->eh.root.type == bfd_link_hash_undefweak) | |
1348 | srel = 0; | |
1349 | else | |
1350 | return bfd_reloc_overflow; | |
1351 | } | |
1352 | opcode &= ~(0x3f << 8); | |
1353 | opcode |= ((srel & 0x3f) << 8); | |
1354 | } | |
1355 | ||
1356 | bfd_put_32 (input_bfd, opcode, hit_data); | |
1357 | break; | |
1358 | case R_METAG_TLS_GD: | |
1359 | case R_METAG_TLS_LDM: | |
1360 | opcode = bfd_get_32 (input_bfd, hit_data); | |
1361 | ||
1362 | if ((bfd_signed_vma)relocation < 0) | |
1363 | { | |
1364 | /* sign extend immediate */ | |
1365 | if ((opcode & 0xf2000001) == 0x02000000) | |
1366 | { | |
1367 | /* ADD De.e,Dx.r,#I16 */ | |
1368 | /* set SE bit */ | |
1369 | opcode |= (1 << 1); | |
1370 | } else | |
1371 | return bfd_reloc_overflow; | |
1372 | } | |
1373 | ||
1374 | bfd_put_32 (input_bfd, opcode, hit_data); | |
1375 | ||
1376 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1377 | contents, rel->r_offset, | |
1378 | relocation, rel->r_addend); | |
1379 | break; | |
1380 | default: | |
1381 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1382 | contents, rel->r_offset, | |
1383 | relocation, rel->r_addend); | |
1384 | } | |
1385 | ||
1386 | return r; | |
1387 | } | |
1388 | ||
1389 | /* This is defined because R_METAG_NONE != 0... | |
1390 | See RELOC_AGAINST_DISCARDED_SECTION for details. */ | |
1391 | #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \ | |
1392 | rel, relend, howto, contents) \ | |
1393 | { \ | |
1394 | _bfd_clear_contents (howto, input_bfd, input_section, \ | |
0930cb30 | 1395 | contents, rel->r_offset); \ |
a3c62988 | 1396 | \ |
0e1862bb | 1397 | if (bfd_link_relocatable (info) \ |
a3c62988 NC |
1398 | && (input_section->flags & SEC_DEBUGGING)) \ |
1399 | { \ | |
1400 | /* Only remove relocations in debug sections since other \ | |
1401 | sections may require relocations. */ \ | |
1402 | Elf_Internal_Shdr *rel_hdr; \ | |
1403 | \ | |
1404 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \ | |
1405 | \ | |
1406 | /* Avoid empty output section. */ \ | |
1407 | if (rel_hdr->sh_size > rel_hdr->sh_entsize) \ | |
1408 | { \ | |
1409 | rel_hdr->sh_size -= rel_hdr->sh_entsize; \ | |
1410 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); \ | |
1411 | rel_hdr->sh_size -= rel_hdr->sh_entsize; \ | |
1412 | \ | |
1413 | memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \ | |
1414 | \ | |
1415 | input_section->reloc_count--; \ | |
1416 | relend--; \ | |
1417 | rel--; \ | |
1418 | continue; \ | |
1419 | } \ | |
1420 | } \ | |
1421 | \ | |
1422 | rel->r_info = R_METAG_NONE; \ | |
1423 | rel->r_addend = 0; \ | |
1424 | continue; \ | |
1425 | } | |
1426 | ||
1427 | /* Relocate a META ELF section. | |
1428 | ||
1429 | The RELOCATE_SECTION function is called by the new ELF backend linker | |
1430 | to handle the relocations for a section. | |
1431 | ||
1432 | The relocs are always passed as Rela structures; if the section | |
1433 | actually uses Rel structures, the r_addend field will always be | |
1434 | zero. | |
1435 | ||
1436 | This function is responsible for adjusting the section contents as | |
1437 | necessary, and (if using Rela relocs and generating a relocatable | |
1438 | output file) adjusting the reloc addend as necessary. | |
1439 | ||
1440 | This function does not have to worry about setting the reloc | |
1441 | address or the reloc symbol index. | |
1442 | ||
1443 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
1444 | ||
1445 | LOCAL_SECTIONS is an array giving the section in the input file | |
1446 | corresponding to the st_shndx field of each local symbol. | |
1447 | ||
1448 | The global hash table entry for the global symbols can be found | |
1449 | via elf_sym_hashes (input_bfd). | |
1450 | ||
1451 | When generating relocatable output, this function must handle | |
1452 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is | |
1453 | going to be the section symbol corresponding to the output | |
1454 | section, which means that the addend must be adjusted | |
1455 | accordingly. */ | |
1456 | ||
1457 | static bfd_boolean | |
1458 | elf_metag_relocate_section (bfd *output_bfd, | |
1459 | struct bfd_link_info *info, | |
1460 | bfd *input_bfd, | |
1461 | asection *input_section, | |
1462 | bfd_byte *contents, | |
1463 | Elf_Internal_Rela *relocs, | |
1464 | Elf_Internal_Sym *local_syms, | |
1465 | asection **local_sections) | |
1466 | { | |
1467 | bfd_vma *local_got_offsets; | |
1468 | Elf_Internal_Shdr *symtab_hdr; | |
1469 | struct elf_link_hash_entry **eh_syms; | |
1470 | struct elf_metag_link_hash_table *htab; | |
1471 | Elf_Internal_Rela *rel; | |
1472 | Elf_Internal_Rela *relend; | |
1473 | asection *sreloc; | |
1474 | ||
1475 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
1476 | eh_syms = elf_sym_hashes (input_bfd); | |
1477 | relend = relocs + input_section->reloc_count; | |
1478 | ||
1479 | htab = metag_link_hash_table (info); | |
1480 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1481 | ||
1482 | sreloc = NULL; | |
1483 | ||
1484 | for (rel = relocs; rel < relend; rel ++) | |
1485 | { | |
1486 | reloc_howto_type *howto; | |
1487 | unsigned long r_symndx; | |
1488 | Elf_Internal_Sym *sym; | |
1489 | asection *sec; | |
1490 | struct elf_metag_link_hash_entry *hh; | |
1491 | bfd_vma relocation; | |
1492 | bfd_reloc_status_type r; | |
1493 | const char *name; | |
1494 | int r_type; | |
1495 | ||
1496 | r_type = ELF32_R_TYPE (rel->r_info); | |
1497 | ||
1498 | if (r_type == R_METAG_GNU_VTINHERIT | |
1499 | || r_type == R_METAG_GNU_VTENTRY | |
1500 | || r_type == R_METAG_NONE) | |
1501 | continue; | |
1502 | ||
1503 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1504 | ||
1505 | howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info); | |
1506 | hh = NULL; | |
1507 | sym = NULL; | |
1508 | sec = NULL; | |
1509 | ||
1510 | if (r_symndx < symtab_hdr->sh_info) | |
1511 | { | |
1512 | sym = local_syms + r_symndx; | |
1513 | sec = local_sections [r_symndx]; | |
1514 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
1515 | ||
1516 | name = bfd_elf_string_from_elf_section | |
1517 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
fd361982 | 1518 | name = name == NULL ? bfd_section_name (sec) : name; |
a3c62988 NC |
1519 | } |
1520 | else | |
1521 | { | |
1522 | struct elf_link_hash_entry *eh; | |
62d887d4 | 1523 | bfd_boolean unresolved_reloc, warned, ignored; |
a3c62988 NC |
1524 | |
1525 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
1526 | r_symndx, symtab_hdr, eh_syms, | |
1527 | eh, sec, relocation, | |
62d887d4 | 1528 | unresolved_reloc, warned, ignored); |
a3c62988 NC |
1529 | |
1530 | name = eh->root.root.string; | |
1531 | hh = (struct elf_metag_link_hash_entry *) eh; | |
1532 | } | |
1533 | ||
1534 | if (sec != NULL && discarded_section (sec)) | |
1535 | METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
1536 | rel, relend, howto, contents); | |
1537 | ||
0e1862bb | 1538 | if (bfd_link_relocatable (info)) |
a3c62988 NC |
1539 | continue; |
1540 | ||
1541 | switch (r_type) | |
1542 | { | |
1543 | case R_METAG_ADDR32: | |
1544 | case R_METAG_RELBRANCH: | |
1545 | if ((input_section->flags & SEC_ALLOC) == 0) | |
1546 | break; | |
1547 | ||
0e1862bb | 1548 | if ((bfd_link_pic (info) |
a3c62988 NC |
1549 | && r_symndx != STN_UNDEF |
1550 | && (input_section->flags & SEC_ALLOC) != 0 | |
1551 | && (r_type != R_METAG_RELBRANCH | |
1552 | || !SYMBOL_CALLS_LOCAL (info, &hh->eh))) | |
0e1862bb | 1553 | || (!bfd_link_pic (info) |
a3c62988 NC |
1554 | && hh != NULL |
1555 | && hh->eh.dynindx != -1 | |
1556 | && !hh->eh.non_got_ref | |
1557 | && ((hh->eh.def_dynamic | |
1558 | && !hh->eh.def_regular) | |
1559 | || hh->eh.root.type == bfd_link_hash_undefweak | |
1560 | || hh->eh.root.type == bfd_link_hash_undefined))) | |
1561 | { | |
1562 | Elf_Internal_Rela outrel; | |
1563 | bfd_boolean skip, relocate; | |
1564 | bfd_byte *loc; | |
1565 | ||
1566 | /* When generating a shared object, these relocations | |
1567 | are copied into the output file to be resolved at run | |
1568 | time. */ | |
1569 | ||
1570 | sreloc = elf_section_data (input_section)->sreloc; | |
1571 | BFD_ASSERT (sreloc != NULL); | |
1572 | ||
1573 | skip = FALSE; | |
1574 | relocate = FALSE; | |
1575 | ||
1576 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, | |
1577 | info, | |
1578 | input_section, | |
1579 | rel->r_offset); | |
1580 | if (outrel.r_offset == (bfd_vma) -1) | |
1581 | skip = TRUE; | |
1582 | else if (outrel.r_offset == (bfd_vma) -2) | |
1583 | skip = TRUE, relocate = TRUE; | |
1584 | outrel.r_offset += (input_section->output_section->vma | |
1585 | + input_section->output_offset); | |
1586 | ||
1587 | if (skip) | |
1588 | { | |
1589 | memset (&outrel, 0, sizeof outrel); | |
1590 | outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE); | |
1591 | } | |
1592 | else if (r_type == R_METAG_RELBRANCH) | |
1593 | { | |
1594 | BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1); | |
1595 | outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type); | |
1596 | outrel.r_addend = rel->r_addend; | |
1597 | } | |
1598 | else | |
1599 | { | |
1600 | /* h->dynindx may be -1 if this symbol was marked to | |
1601 | become local. */ | |
1602 | if (hh == NULL | |
1603 | || ((info->symbolic || hh->eh.dynindx == -1) | |
1604 | && hh->eh.def_regular)) | |
1605 | { | |
1606 | relocate = TRUE; | |
1607 | outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE); | |
1608 | outrel.r_addend = relocation + rel->r_addend; | |
1609 | } | |
1610 | else | |
1611 | { | |
1612 | BFD_ASSERT (hh->eh.dynindx != -1); | |
1613 | outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type); | |
1614 | outrel.r_addend = rel->r_addend; | |
1615 | } | |
1616 | } | |
1617 | ||
1618 | loc = sreloc->contents; | |
1619 | loc += sreloc->reloc_count * sizeof(Elf32_External_Rela); | |
1620 | bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); | |
1621 | ++sreloc->reloc_count; | |
1622 | ||
1623 | /* If this reloc is against an external symbol, we do | |
1624 | not want to fiddle with the addend. Otherwise, we | |
1625 | need to include the symbol value so that it becomes | |
1626 | an addend for the dynamic reloc. */ | |
1627 | if (! relocate) | |
1628 | continue; | |
1629 | } | |
1630 | break; | |
1631 | ||
1632 | case R_METAG_RELBRANCH_PLT: | |
1633 | /* Relocation is to the entry for this symbol in the | |
1634 | procedure linkage table. */ | |
1635 | ||
1636 | if (hh == NULL) | |
1637 | break; | |
1638 | ||
1639 | if (hh->eh.forced_local) | |
1640 | break; | |
1641 | ||
ce558b89 | 1642 | if (hh->eh.plt.offset == (bfd_vma) -1 || htab->etab.splt == NULL) |
a3c62988 NC |
1643 | { |
1644 | /* We didn't make a PLT entry for this symbol. This | |
1645 | happens when statically linking PIC code, or when | |
1646 | using -Bsymbolic. */ | |
1647 | break; | |
1648 | } | |
1649 | ||
ce558b89 AM |
1650 | relocation = (htab->etab.splt->output_section->vma |
1651 | + htab->etab.splt->output_offset | |
a3c62988 NC |
1652 | + hh->eh.plt.offset); |
1653 | break; | |
1654 | case R_METAG_HI16_GOTPC: | |
1655 | case R_METAG_LO16_GOTPC: | |
ce558b89 | 1656 | BFD_ASSERT (htab->etab.sgot != NULL); |
a3c62988 | 1657 | |
ce558b89 AM |
1658 | relocation = (htab->etab.sgot->output_section->vma + |
1659 | htab->etab.sgot->output_offset); | |
a3c62988 NC |
1660 | relocation += GOT_REG_OFFSET; |
1661 | relocation -= (input_section->output_section->vma | |
1662 | + input_section->output_offset | |
1663 | + rel->r_offset); | |
1664 | break; | |
1665 | case R_METAG_HI16_GOTOFF: | |
1666 | case R_METAG_LO16_GOTOFF: | |
1667 | case R_METAG_GETSET_GOTOFF: | |
ce558b89 | 1668 | BFD_ASSERT (htab->etab.sgot != NULL); |
a3c62988 | 1669 | |
ce558b89 AM |
1670 | relocation -= (htab->etab.sgot->output_section->vma + |
1671 | htab->etab.sgot->output_offset); | |
a3c62988 NC |
1672 | relocation -= GOT_REG_OFFSET; |
1673 | break; | |
1674 | case R_METAG_GETSET_GOT: | |
1675 | { | |
1676 | bfd_vma off; | |
1677 | bfd_boolean do_got = 0; | |
1678 | ||
1679 | /* Relocation is to the entry for this symbol in the | |
1680 | global offset table. */ | |
1681 | if (hh != NULL) | |
1682 | { | |
1683 | bfd_boolean dyn; | |
1684 | ||
1685 | off = hh->eh.got.offset; | |
1686 | dyn = htab->etab.dynamic_sections_created; | |
0e1862bb L |
1687 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
1688 | bfd_link_pic (info), | |
a3c62988 NC |
1689 | &hh->eh)) |
1690 | { | |
1691 | /* If we aren't going to call finish_dynamic_symbol, | |
1692 | then we need to handle initialisation of the .got | |
1693 | entry and create needed relocs here. Since the | |
1694 | offset must always be a multiple of 4, we use the | |
1695 | least significant bit to record whether we have | |
1696 | initialised it already. */ | |
1697 | if ((off & 1) != 0) | |
1698 | off &= ~1; | |
1699 | else | |
1700 | { | |
1701 | hh->eh.got.offset |= 1; | |
1702 | do_got = 1; | |
1703 | } | |
1704 | } | |
1705 | } | |
1706 | else | |
1707 | { | |
1708 | /* Local symbol case. */ | |
1709 | if (local_got_offsets == NULL) | |
1710 | abort (); | |
1711 | ||
1712 | off = local_got_offsets[r_symndx]; | |
1713 | ||
1714 | /* The offset must always be a multiple of 4. We use | |
1715 | the least significant bit to record whether we have | |
1716 | already generated the necessary reloc. */ | |
1717 | if ((off & 1) != 0) | |
1718 | off &= ~1; | |
1719 | else | |
1720 | { | |
1721 | local_got_offsets[r_symndx] |= 1; | |
1722 | do_got = 1; | |
1723 | } | |
1724 | } | |
1725 | ||
1726 | if (do_got) | |
1727 | { | |
0e1862bb | 1728 | if (bfd_link_pic (info)) |
a3c62988 NC |
1729 | { |
1730 | /* Output a dynamic relocation for this GOT entry. | |
1731 | In this case it is relative to the base of the | |
1732 | object because the symbol index is zero. */ | |
1733 | Elf_Internal_Rela outrel; | |
1734 | bfd_byte *loc; | |
ce558b89 | 1735 | asection *s = htab->etab.srelgot; |
a3c62988 NC |
1736 | |
1737 | outrel.r_offset = (off | |
ce558b89 AM |
1738 | + htab->etab.sgot->output_offset |
1739 | + htab->etab.sgot->output_section->vma); | |
a3c62988 NC |
1740 | outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE); |
1741 | outrel.r_addend = relocation; | |
1742 | loc = s->contents; | |
1743 | loc += s->reloc_count++ * sizeof (Elf32_External_Rela); | |
1744 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
1745 | } | |
1746 | else | |
1747 | bfd_put_32 (output_bfd, relocation, | |
ce558b89 | 1748 | htab->etab.sgot->contents + off); |
a3c62988 NC |
1749 | } |
1750 | ||
1751 | if (off >= (bfd_vma) -2) | |
1752 | abort (); | |
1753 | ||
1754 | relocation = off - GOT_REG_OFFSET; | |
1755 | } | |
1756 | break; | |
1757 | case R_METAG_TLS_GD: | |
1758 | case R_METAG_TLS_IE: | |
1759 | { | |
1760 | /* XXXMJF There is room here for optimisations. For example | |
1761 | converting from GD->IE, etc. */ | |
1762 | bfd_vma off; | |
1763 | int indx; | |
1764 | char tls_type; | |
1765 | ||
ce558b89 | 1766 | if (htab->etab.sgot == NULL) |
a3c62988 NC |
1767 | abort(); |
1768 | ||
1769 | indx = 0; | |
1770 | if (hh != NULL) | |
1771 | { | |
1772 | bfd_boolean dyn; | |
1773 | dyn = htab->etab.dynamic_sections_created; | |
1774 | ||
0e1862bb L |
1775 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
1776 | bfd_link_pic (info), | |
1777 | &hh->eh) | |
1778 | && (!bfd_link_pic (info) | |
a3c62988 NC |
1779 | || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh))) |
1780 | { | |
1781 | indx = hh->eh.dynindx; | |
1782 | } | |
1783 | off = hh->eh.got.offset; | |
1784 | tls_type = hh->tls_type; | |
1785 | } | |
1786 | else | |
1787 | { | |
1788 | /* Local symbol case. */ | |
1789 | if (local_got_offsets == NULL) | |
1790 | abort (); | |
1791 | ||
1792 | off = local_got_offsets[r_symndx]; | |
1793 | tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx]; | |
1794 | } | |
1795 | ||
1796 | if (tls_type == GOT_UNKNOWN) | |
6ec49e7c | 1797 | abort (); |
a3c62988 NC |
1798 | |
1799 | if ((off & 1) != 0) | |
1800 | off &= ~1; | |
1801 | else | |
1802 | { | |
1803 | bfd_boolean need_relocs = FALSE; | |
1804 | Elf_Internal_Rela outrel; | |
1805 | bfd_byte *loc = NULL; | |
1806 | int cur_off = off; | |
1807 | ||
1808 | /* The GOT entries have not been initialized yet. Do it | |
1809 | now, and emit any relocations. If both an IE GOT and a | |
1810 | GD GOT are necessary, we emit the GD first. */ | |
1811 | ||
0e1862bb | 1812 | if ((bfd_link_pic (info) || indx != 0) |
a3c62988 NC |
1813 | && (hh == NULL |
1814 | || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT | |
1815 | || hh->eh.root.type != bfd_link_hash_undefweak)) | |
1816 | { | |
1817 | need_relocs = TRUE; | |
ce558b89 | 1818 | loc = htab->etab.srelgot->contents; |
a3c62988 | 1819 | /* FIXME (CAO): Should this be reloc_count++ ? */ |
ce558b89 | 1820 | loc += htab->etab.srelgot->reloc_count * sizeof (Elf32_External_Rela); |
a3c62988 NC |
1821 | } |
1822 | ||
1823 | if (tls_type & GOT_TLS_GD) | |
1824 | { | |
1825 | if (need_relocs) | |
1826 | { | |
1827 | outrel.r_offset = (cur_off | |
ce558b89 AM |
1828 | + htab->etab.sgot->output_section->vma |
1829 | + htab->etab.sgot->output_offset); | |
a3c62988 NC |
1830 | outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD); |
1831 | outrel.r_addend = 0; | |
ce558b89 | 1832 | bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + cur_off); |
a3c62988 NC |
1833 | |
1834 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
ce558b89 | 1835 | htab->etab.srelgot->reloc_count++; |
a3c62988 NC |
1836 | loc += sizeof (Elf32_External_Rela); |
1837 | ||
1838 | if (indx == 0) | |
1839 | bfd_put_32 (output_bfd, 0, | |
ce558b89 | 1840 | htab->etab.sgot->contents + cur_off + 4); |
a3c62988 NC |
1841 | else |
1842 | { | |
1843 | bfd_put_32 (output_bfd, 0, | |
ce558b89 | 1844 | htab->etab.sgot->contents + cur_off + 4); |
a3c62988 NC |
1845 | outrel.r_info = ELF32_R_INFO (indx, |
1846 | R_METAG_TLS_DTPOFF); | |
1847 | outrel.r_offset += 4; | |
1848 | bfd_elf32_swap_reloca_out (output_bfd, | |
1849 | &outrel, loc); | |
ce558b89 | 1850 | htab->etab.srelgot->reloc_count++; |
a3c62988 NC |
1851 | loc += sizeof (Elf32_External_Rela); |
1852 | } | |
1853 | } | |
1854 | else | |
1855 | { | |
1856 | /* We don't support changing the TLS model. */ | |
6ec49e7c NC |
1857 | /* PR 20675 */ |
1858 | if (bfd_link_pic (info)) | |
871b3ab2 | 1859 | _bfd_error_handler (_("%pB(%pA): multiple TLS models are not supported"), |
d42c267e | 1860 | input_bfd, input_section); |
6ec49e7c | 1861 | else |
871b3ab2 | 1862 | _bfd_error_handler (_("%pB(%pA): shared library symbol %s encountered whilst performing a static link"), |
6ec49e7c NC |
1863 | input_bfd, input_section, name); |
1864 | return FALSE; | |
a3c62988 NC |
1865 | } |
1866 | ||
1867 | cur_off += 8; | |
1868 | } | |
1869 | ||
1870 | if (tls_type & GOT_TLS_IE) | |
1871 | { | |
1872 | if (need_relocs) | |
1873 | { | |
1874 | outrel.r_offset = (cur_off | |
ce558b89 AM |
1875 | + htab->etab.sgot->output_section->vma |
1876 | + htab->etab.sgot->output_offset); | |
a3c62988 NC |
1877 | outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF); |
1878 | ||
1879 | if (indx == 0) | |
1880 | outrel.r_addend = relocation - dtpoff_base (info); | |
1881 | else | |
1882 | outrel.r_addend = 0; | |
1883 | ||
1884 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
ce558b89 | 1885 | htab->etab.srelgot->reloc_count++; |
a3c62988 NC |
1886 | loc += sizeof (Elf32_External_Rela); |
1887 | } | |
1888 | else | |
1889 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
ce558b89 | 1890 | htab->etab.sgot->contents + cur_off); |
a3c62988 NC |
1891 | |
1892 | cur_off += 4; | |
1893 | } | |
1894 | ||
1895 | if (hh != NULL) | |
1896 | hh->eh.got.offset |= 1; | |
1897 | else | |
1898 | local_got_offsets[r_symndx] |= 1; | |
1899 | } | |
1900 | ||
1901 | /* Add the base of the GOT to the relocation value. */ | |
1902 | relocation = off - GOT_REG_OFFSET; | |
1903 | ||
1904 | break; | |
1905 | } | |
1906 | ||
1907 | case R_METAG_TLS_IENONPIC_HI16: | |
1908 | case R_METAG_TLS_IENONPIC_LO16: | |
1909 | case R_METAG_TLS_LE_HI16: | |
1910 | case R_METAG_TLS_LE_LO16: | |
0e1862bb | 1911 | if (bfd_link_pic (info)) |
a3c62988 | 1912 | { |
4eca0228 | 1913 | _bfd_error_handler |
695344c0 | 1914 | /* xgettext:c-format */ |
2dcf00ce AM |
1915 | (_("%pB(%pA+%#" PRIx64 "): " |
1916 | "%s relocation not permitted in shared object"), | |
1917 | input_bfd, input_section, (uint64_t) rel->r_offset, | |
1918 | howto->name); | |
a3c62988 NC |
1919 | return FALSE; |
1920 | } | |
1921 | else | |
1922 | relocation = tpoff (info, relocation); | |
1923 | break; | |
1924 | case R_METAG_TLS_LDO_HI16: | |
1925 | case R_METAG_TLS_LDO_LO16: | |
0e1862bb | 1926 | if (! bfd_link_pic (info)) |
a3c62988 NC |
1927 | relocation = tpoff (info, relocation); |
1928 | else | |
1929 | relocation -= dtpoff_base (info); | |
1930 | break; | |
1931 | case R_METAG_TLS_LDM: | |
1932 | { | |
1933 | bfd_vma off; | |
1934 | ||
ce558b89 | 1935 | if (htab->etab.sgot == NULL) |
a3c62988 NC |
1936 | abort(); |
1937 | off = htab->tls_ldm_got.offset; | |
1938 | if (off & 1) | |
1939 | off &= ~1; | |
1940 | else | |
1941 | { | |
1942 | Elf_Internal_Rela outrel; | |
1943 | bfd_byte *loc; | |
1944 | ||
1945 | outrel.r_offset = (off | |
ce558b89 AM |
1946 | + htab->etab.sgot->output_section->vma |
1947 | + htab->etab.sgot->output_offset); | |
a3c62988 NC |
1948 | |
1949 | outrel.r_addend = 0; | |
1950 | outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD); | |
ce558b89 AM |
1951 | loc = htab->etab.srelgot->contents; |
1952 | loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
a3c62988 NC |
1953 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
1954 | htab->tls_ldm_got.offset |= 1; | |
1955 | } | |
1956 | ||
1957 | relocation = off - GOT_REG_OFFSET; | |
1958 | break; | |
1959 | } | |
1960 | default: | |
1961 | break; | |
1962 | } | |
1963 | ||
1964 | r = metag_final_link_relocate (howto, input_bfd, input_section, | |
1965 | contents, rel, relocation, hh, htab, | |
1966 | sec); | |
1967 | ||
1968 | if (r != bfd_reloc_ok) | |
1969 | { | |
1970 | const char * msg = (const char *) NULL; | |
1971 | ||
1972 | switch (r) | |
1973 | { | |
1974 | case bfd_reloc_overflow: | |
1a72702b | 1975 | (*info->callbacks->reloc_overflow) |
a3c62988 NC |
1976 | (info, (hh ? &hh->eh.root : NULL), name, howto->name, |
1977 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
1978 | break; | |
1979 | ||
1980 | case bfd_reloc_undefined: | |
1a72702b AM |
1981 | (*info->callbacks->undefined_symbol) |
1982 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
a3c62988 NC |
1983 | break; |
1984 | ||
1985 | case bfd_reloc_outofrange: | |
1986 | msg = _("internal error: out of range error"); | |
1987 | break; | |
1988 | ||
1989 | case bfd_reloc_notsupported: | |
1990 | msg = _("internal error: unsupported relocation error"); | |
1991 | break; | |
1992 | ||
1993 | case bfd_reloc_dangerous: | |
1994 | msg = _("internal error: dangerous relocation"); | |
1995 | break; | |
1996 | ||
1997 | default: | |
1998 | msg = _("internal error: unknown error"); | |
1999 | break; | |
2000 | } | |
2001 | ||
2002 | if (msg) | |
1a72702b AM |
2003 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
2004 | input_section, rel->r_offset); | |
a3c62988 NC |
2005 | } |
2006 | } | |
2007 | ||
2008 | return TRUE; | |
2009 | } | |
2010 | ||
2011 | /* Create the .plt and .got sections, and set up our hash table | |
2012 | short-cuts to various dynamic sections. */ | |
2013 | ||
2014 | static bfd_boolean | |
2015 | elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) | |
2016 | { | |
2017 | struct elf_metag_link_hash_table *htab; | |
2018 | struct elf_link_hash_entry *eh; | |
2019 | struct bfd_link_hash_entry *bh; | |
2020 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2021 | ||
2022 | /* Don't try to create the .plt and .got twice. */ | |
2023 | htab = metag_link_hash_table (info); | |
ce558b89 | 2024 | if (htab->etab.splt != NULL) |
a3c62988 NC |
2025 | return TRUE; |
2026 | ||
2027 | /* Call the generic code to do most of the work. */ | |
2028 | if (! _bfd_elf_create_dynamic_sections (abfd, info)) | |
2029 | return FALSE; | |
2030 | ||
ce558b89 AM |
2031 | /* The header goes at the start of the dynamic .got section, which |
2032 | is placed after the dynamic .got.plt section. ie. The header is | |
2033 | not necessarily at the start of the output .got section. */ | |
2034 | htab->etab.sgot->size += 12; | |
a3c62988 | 2035 | |
ce558b89 | 2036 | /* Define the symbol __GLOBAL_OFFSET_TABLE__ on the header. */ |
a3c62988 NC |
2037 | bh = NULL; |
2038 | if (!(_bfd_generic_link_add_one_symbol | |
ce558b89 | 2039 | (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->etab.sgot, |
a3c62988 NC |
2040 | (bfd_vma) 0, NULL, FALSE, bed->collect, &bh))) |
2041 | return FALSE; | |
2042 | eh = (struct elf_link_hash_entry *) bh; | |
2043 | eh->def_regular = 1; | |
2044 | eh->type = STT_OBJECT; | |
2045 | eh->other = STV_HIDDEN; | |
2046 | ||
0e1862bb | 2047 | if (! bfd_link_executable (info) |
a3c62988 NC |
2048 | && ! bfd_elf_link_record_dynamic_symbol (info, eh)) |
2049 | return FALSE; | |
2050 | ||
ce558b89 | 2051 | htab->etab.hgot = eh; |
a3c62988 | 2052 | |
a3c62988 NC |
2053 | return TRUE; |
2054 | } | |
2055 | ||
2056 | /* Look through the relocs for a section during the first phase, and | |
2057 | calculate needed space in the global offset table, procedure linkage | |
2058 | table, and dynamic reloc sections. At this point we haven't | |
2059 | necessarily read all the input files. */ | |
2060 | ||
2061 | static bfd_boolean | |
2062 | elf_metag_check_relocs (bfd *abfd, | |
2063 | struct bfd_link_info *info, | |
2064 | asection *sec, | |
2065 | const Elf_Internal_Rela *relocs) | |
2066 | { | |
2067 | Elf_Internal_Shdr *symtab_hdr; | |
2068 | struct elf_link_hash_entry **eh_syms; | |
2069 | const Elf_Internal_Rela *rel; | |
2070 | const Elf_Internal_Rela *rel_end; | |
2071 | struct elf_metag_link_hash_table *htab; | |
2072 | asection *sreloc; | |
2073 | bfd *dynobj; | |
2074 | int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN; | |
2075 | ||
0e1862bb | 2076 | if (bfd_link_relocatable (info)) |
a3c62988 NC |
2077 | return TRUE; |
2078 | ||
2079 | htab = metag_link_hash_table (info); | |
2080 | dynobj = htab->etab.dynobj; | |
2081 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2082 | eh_syms = elf_sym_hashes (abfd); | |
2083 | sreloc = NULL; | |
2084 | ||
2085 | if (htab == NULL) | |
2086 | return FALSE; | |
2087 | ||
2088 | rel_end = relocs + sec->reloc_count; | |
2089 | for (rel = relocs; rel < rel_end; rel++) | |
2090 | { | |
2091 | int r_type; | |
2092 | struct elf_metag_link_hash_entry *hh; | |
1a18f0ae | 2093 | Elf_Internal_Sym *isym; |
a3c62988 NC |
2094 | unsigned long r_symndx; |
2095 | ||
2096 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2097 | r_type = ELF32_R_TYPE (rel->r_info); | |
2098 | if (r_symndx < symtab_hdr->sh_info) | |
1a18f0ae NC |
2099 | { |
2100 | /* A local symbol. */ | |
2101 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2102 | abfd, r_symndx); | |
2103 | if (isym == NULL) | |
2104 | return FALSE; | |
2105 | ||
2106 | hh = NULL; | |
2107 | } | |
a3c62988 NC |
2108 | else |
2109 | { | |
1a18f0ae NC |
2110 | isym = NULL; |
2111 | ||
a3c62988 NC |
2112 | hh = (struct elf_metag_link_hash_entry *) |
2113 | eh_syms[r_symndx - symtab_hdr->sh_info]; | |
2114 | while (hh->eh.root.type == bfd_link_hash_indirect | |
2115 | || hh->eh.root.type == bfd_link_hash_warning) | |
2116 | hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link; | |
2117 | } | |
2118 | ||
2119 | /* Some relocs require a global offset table. */ | |
ce558b89 | 2120 | if (htab->etab.sgot == NULL) |
a3c62988 NC |
2121 | { |
2122 | switch (r_type) | |
2123 | { | |
2124 | case R_METAG_TLS_GD: | |
2125 | case R_METAG_TLS_LDM: | |
2126 | case R_METAG_TLS_IE: | |
0e1862bb | 2127 | if (bfd_link_pic (info)) |
a3c62988 NC |
2128 | info->flags |= DF_STATIC_TLS; |
2129 | /* Fall through. */ | |
2130 | ||
2131 | case R_METAG_HI16_GOTOFF: | |
2132 | case R_METAG_LO16_GOTOFF: | |
2133 | case R_METAG_GETSET_GOTOFF: | |
2134 | case R_METAG_GETSET_GOT: | |
2135 | case R_METAG_HI16_GOTPC: | |
2136 | case R_METAG_LO16_GOTPC: | |
2137 | if (dynobj == NULL) | |
2138 | htab->etab.dynobj = dynobj = abfd; | |
2139 | if (!elf_metag_create_dynamic_sections (dynobj, info)) | |
2140 | return FALSE; | |
2141 | break; | |
2142 | ||
2143 | default: | |
2144 | break; | |
2145 | } | |
2146 | } | |
2147 | ||
2148 | switch (r_type) | |
2149 | { | |
2150 | case R_METAG_TLS_IE: | |
2151 | case R_METAG_TLS_GD: | |
2152 | case R_METAG_GETSET_GOT: | |
2153 | switch (r_type) | |
2154 | { | |
2155 | default: | |
2156 | tls_type = GOT_NORMAL; | |
2157 | break; | |
2158 | case R_METAG_TLS_IE: | |
2159 | tls_type = GOT_TLS_IE; | |
2160 | break; | |
2161 | case R_METAG_TLS_GD: | |
2162 | tls_type = GOT_TLS_GD; | |
2163 | break; | |
2164 | } | |
2165 | ||
2166 | if (hh != NULL) | |
2167 | { | |
2168 | hh->eh.got.refcount += 1; | |
2169 | old_tls_type = hh->tls_type; | |
2170 | } | |
2171 | else | |
2172 | { | |
2173 | bfd_signed_vma *local_got_refcounts; | |
2174 | ||
2175 | /* This is a global offset table entry for a local | |
2176 | symbol. */ | |
2177 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2178 | if (local_got_refcounts == NULL) | |
2179 | { | |
2180 | bfd_size_type size; | |
2181 | ||
2182 | size = symtab_hdr->sh_info; | |
2183 | size *= sizeof (bfd_signed_vma); | |
2184 | /* Add in space to store the local GOT TLS types. */ | |
2185 | size += symtab_hdr->sh_info; | |
2186 | local_got_refcounts = ((bfd_signed_vma *) | |
2187 | bfd_zalloc (abfd, size)); | |
2188 | if (local_got_refcounts == NULL) | |
2189 | return FALSE; | |
2190 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
2191 | memset (metag_elf_local_got_tls_type (abfd), | |
2192 | GOT_UNKNOWN, symtab_hdr->sh_info); | |
2193 | } | |
2194 | local_got_refcounts[r_symndx] += 1; | |
2195 | old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx]; | |
2196 | } | |
2197 | ||
2198 | if (old_tls_type != tls_type) | |
2199 | { | |
2200 | if (hh != NULL) | |
2201 | { | |
2202 | hh->tls_type = tls_type; | |
2203 | } | |
2204 | else | |
2205 | { | |
2206 | metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | break; | |
2211 | ||
2212 | case R_METAG_TLS_LDM: | |
2213 | metag_link_hash_table (info)->tls_ldm_got.refcount += 1; | |
2214 | break; | |
2215 | ||
2216 | case R_METAG_RELBRANCH_PLT: | |
2217 | /* This symbol requires a procedure linkage table entry. We | |
2218 | actually build the entry in adjust_dynamic_symbol, | |
2219 | because this might be a case of linking PIC code without | |
2220 | linking in any dynamic objects, in which case we don't | |
2221 | need to generate a procedure linkage table after all. */ | |
2222 | ||
2223 | /* If this is a local symbol, we resolve it directly without | |
2224 | creating a procedure linkage table entry. */ | |
2225 | if (hh == NULL) | |
2226 | continue; | |
2227 | ||
2228 | if (hh->eh.forced_local) | |
2229 | break; | |
2230 | ||
2231 | hh->eh.needs_plt = 1; | |
2232 | hh->eh.plt.refcount += 1; | |
2233 | break; | |
2234 | ||
a3c62988 NC |
2235 | case R_METAG_HIADDR16: |
2236 | case R_METAG_LOADDR16: | |
1a18f0ae NC |
2237 | /* Let's help debug shared library creation. These relocs |
2238 | cannot be used in shared libs. Don't error out for | |
2239 | sections we don't care about, such as debug sections or | |
2240 | non-constant sections. */ | |
0e1862bb | 2241 | if (bfd_link_pic (info) |
1a18f0ae NC |
2242 | && (sec->flags & SEC_ALLOC) != 0 |
2243 | && (sec->flags & SEC_READONLY) != 0) | |
2244 | { | |
2245 | const char *name; | |
2246 | ||
2247 | if (hh) | |
2248 | name = hh->eh.root.root.string; | |
2249 | else | |
2250 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
4eca0228 | 2251 | _bfd_error_handler |
695344c0 | 2252 | /* xgettext:c-format */ |
871b3ab2 | 2253 | (_("%pB: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1a18f0ae NC |
2254 | abfd, elf_metag_howto_table[r_type].name, name); |
2255 | bfd_set_error (bfd_error_bad_value); | |
2256 | return FALSE; | |
2257 | } | |
2258 | ||
2259 | /* Fall through. */ | |
2260 | case R_METAG_ADDR32: | |
a3c62988 NC |
2261 | case R_METAG_RELBRANCH: |
2262 | case R_METAG_GETSETOFF: | |
0e1862bb | 2263 | if (hh != NULL && !bfd_link_pic (info)) |
a3c62988 NC |
2264 | { |
2265 | hh->eh.non_got_ref = 1; | |
2266 | hh->eh.plt.refcount += 1; | |
2267 | } | |
2268 | ||
2269 | /* If we are creating a shared library, and this is a reloc | |
2270 | against a global symbol, or a non PC relative reloc | |
2271 | against a local symbol, then we need to copy the reloc | |
2272 | into the shared library. However, if we are linking with | |
2273 | -Bsymbolic, we do not need to copy a reloc against a | |
2274 | global symbol which is defined in an object we are | |
2275 | including in the link (i.e., DEF_REGULAR is set). At | |
2276 | this point we have not seen all the input files, so it is | |
2277 | possible that DEF_REGULAR is not set now but will be set | |
2278 | later (it is never cleared). We account for that | |
2279 | possibility below by storing information in the | |
2280 | dyn_relocs field of the hash table entry. A similar | |
2281 | situation occurs when creating shared libraries and symbol | |
2282 | visibility changes render the symbol local. | |
2283 | ||
2284 | If on the other hand, we are creating an executable, we | |
2285 | may need to keep relocations for symbols satisfied by a | |
2286 | dynamic library if we manage to avoid copy relocs for the | |
2287 | symbol. */ | |
0e1862bb | 2288 | if ((bfd_link_pic (info) |
a3c62988 NC |
2289 | && (sec->flags & SEC_ALLOC) != 0 |
2290 | && (r_type != R_METAG_RELBRANCH | |
2291 | || (hh != NULL | |
2292 | && (! info->symbolic | |
2293 | || hh->eh.root.type == bfd_link_hash_defweak | |
2294 | || !hh->eh.def_regular)))) | |
0e1862bb | 2295 | || (!bfd_link_pic (info) |
a3c62988 NC |
2296 | && (sec->flags & SEC_ALLOC) != 0 |
2297 | && hh != NULL | |
2298 | && (hh->eh.root.type == bfd_link_hash_defweak | |
2299 | || !hh->eh.def_regular))) | |
2300 | { | |
3bf083ed AM |
2301 | struct elf_dyn_relocs *hdh_p; |
2302 | struct elf_dyn_relocs **hdh_head; | |
a3c62988 NC |
2303 | |
2304 | if (dynobj == NULL) | |
2305 | htab->etab.dynobj = dynobj = abfd; | |
2306 | ||
2307 | /* When creating a shared object, we must copy these | |
2308 | relocs into the output file. We create a reloc | |
2309 | section in dynobj and make room for the reloc. */ | |
2310 | if (sreloc == NULL) | |
2311 | { | |
2312 | sreloc = _bfd_elf_make_dynamic_reloc_section | |
2313 | (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE); | |
2314 | ||
2315 | if (sreloc == NULL) | |
2316 | { | |
2317 | bfd_set_error (bfd_error_bad_value); | |
2318 | return FALSE; | |
2319 | } | |
2320 | ||
2321 | elf_section_data (sec)->sreloc = sreloc; | |
2322 | } | |
2323 | ||
2324 | /* If this is a global symbol, we count the number of | |
2325 | relocations we need for this symbol. */ | |
2326 | if (hh != NULL) | |
190eb1dd | 2327 | hdh_head = &hh->eh.dyn_relocs; |
a3c62988 NC |
2328 | else |
2329 | { | |
2330 | /* Track dynamic relocs needed for local syms too. */ | |
2331 | asection *sr; | |
2332 | void *vpp; | |
a3c62988 NC |
2333 | |
2334 | sr = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
2335 | if (sr == NULL) | |
2336 | sr = sec; | |
2337 | ||
2338 | vpp = &elf_section_data (sr)->local_dynrel; | |
3bf083ed | 2339 | hdh_head = (struct elf_dyn_relocs **) vpp; |
a3c62988 NC |
2340 | } |
2341 | ||
2342 | hdh_p = *hdh_head; | |
2343 | if (hdh_p == NULL || hdh_p->sec != sec) | |
2344 | { | |
3bf083ed | 2345 | hdh_p = ((struct elf_dyn_relocs *) |
a3c62988 NC |
2346 | bfd_alloc (dynobj, sizeof *hdh_p)); |
2347 | if (hdh_p == NULL) | |
2348 | return FALSE; | |
3bf083ed | 2349 | hdh_p->next = *hdh_head; |
a3c62988 NC |
2350 | *hdh_head = hdh_p; |
2351 | hdh_p->sec = sec; | |
2352 | hdh_p->count = 0; | |
3bf083ed | 2353 | hdh_p->pc_count = 0; |
a3c62988 NC |
2354 | } |
2355 | ||
2356 | hdh_p->count += 1; | |
2357 | if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH) | |
3bf083ed | 2358 | hdh_p->pc_count += 1; |
a3c62988 NC |
2359 | } |
2360 | break; | |
2361 | ||
2362 | /* This relocation describes the C++ object vtable hierarchy. | |
2363 | Reconstruct it for later use during GC. */ | |
2364 | case R_METAG_GNU_VTINHERIT: | |
2365 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh, | |
2366 | rel->r_offset)) | |
2367 | return FALSE; | |
2368 | break; | |
2369 | ||
2370 | /* This relocation describes which C++ vtable entries are actually | |
2371 | used. Record for later use during GC. */ | |
2372 | case R_METAG_GNU_VTENTRY: | |
a0ea3a14 | 2373 | if (!bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend)) |
a3c62988 NC |
2374 | return FALSE; |
2375 | break; | |
2376 | } | |
2377 | } | |
2378 | ||
2379 | return TRUE; | |
2380 | } | |
2381 | ||
2382 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
2383 | ||
2384 | static void | |
2385 | elf_metag_copy_indirect_symbol (struct bfd_link_info *info, | |
2386 | struct elf_link_hash_entry *eh_dir, | |
2387 | struct elf_link_hash_entry *eh_ind) | |
2388 | { | |
2389 | struct elf_metag_link_hash_entry *hh_dir, *hh_ind; | |
2390 | ||
2391 | hh_dir = metag_elf_hash_entry (eh_dir); | |
2392 | hh_ind = metag_elf_hash_entry (eh_ind); | |
2393 | ||
a3c62988 NC |
2394 | if (eh_ind->root.type == bfd_link_hash_indirect |
2395 | && eh_dir->got.refcount <= 0) | |
2396 | { | |
2397 | hh_dir->tls_type = hh_ind->tls_type; | |
2398 | hh_ind->tls_type = GOT_UNKNOWN; | |
2399 | } | |
2400 | ||
2401 | _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind); | |
2402 | } | |
2403 | ||
2404 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2405 | regular object. The current definition is in some section of the | |
2406 | dynamic object, but we're not including those sections. We have to | |
2407 | change the definition to something the rest of the link can | |
2408 | understand. */ | |
2409 | ||
2410 | static bfd_boolean | |
2411 | elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info, | |
2412 | struct elf_link_hash_entry *eh) | |
2413 | { | |
2414 | struct elf_metag_link_hash_table *htab; | |
5474d94f | 2415 | asection *s, *srel; |
a3c62988 NC |
2416 | |
2417 | /* If this is a function, put it in the procedure linkage table. We | |
2418 | will fill in the contents of the procedure linkage table later, | |
2419 | when we know the address of the .got section. */ | |
2420 | if (eh->type == STT_FUNC | |
2421 | || eh->needs_plt) | |
2422 | { | |
2423 | if (eh->plt.refcount <= 0 | |
2424 | || SYMBOL_CALLS_LOCAL (info, eh) | |
2425 | || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT | |
2426 | && eh->root.type == bfd_link_hash_undefweak)) | |
2427 | { | |
2428 | /* This case can occur if we saw a PLT reloc in an input | |
2429 | file, but the symbol was never referred to by a dynamic | |
2430 | object. In such a case, we don't actually need to build | |
2431 | a procedure linkage table, and we can just do a PCREL | |
2432 | reloc instead. */ | |
2433 | eh->plt.offset = (bfd_vma) -1; | |
2434 | eh->needs_plt = 0; | |
2435 | } | |
2436 | ||
2437 | return TRUE; | |
2438 | } | |
2439 | else | |
2440 | eh->plt.offset = (bfd_vma) -1; | |
2441 | ||
2442 | /* If this is a weak symbol, and there is a real definition, the | |
2443 | processor independent code will have arranged for us to see the | |
2444 | real definition first, and we can just use the same value. */ | |
60d67dc8 | 2445 | if (eh->is_weakalias) |
a3c62988 | 2446 | { |
60d67dc8 AM |
2447 | struct elf_link_hash_entry *def = weakdef (eh); |
2448 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
2449 | eh->root.u.def.section = def->root.u.def.section; | |
2450 | eh->root.u.def.value = def->root.u.def.value; | |
2451 | eh->non_got_ref = def->non_got_ref; | |
a3c62988 NC |
2452 | return TRUE; |
2453 | } | |
2454 | ||
2455 | /* This is a reference to a symbol defined by a dynamic object which | |
2456 | is not a function. */ | |
2457 | ||
2458 | /* If we are creating a shared library, we must presume that the | |
2459 | only references to the symbol are via the global offset table. | |
2460 | For such cases we need not do anything here; the relocations will | |
2461 | be handled correctly by relocate_section. */ | |
0e1862bb | 2462 | if (bfd_link_pic (info)) |
a3c62988 NC |
2463 | return TRUE; |
2464 | ||
2465 | /* If there are no references to this symbol that do not use the | |
2466 | GOT, we don't need to generate a copy reloc. */ | |
2467 | if (!eh->non_got_ref) | |
2468 | return TRUE; | |
2469 | ||
2470 | /* If -z nocopyreloc was given, we won't generate them either. */ | |
2471 | if (info->nocopyreloc) | |
2472 | { | |
2473 | eh->non_got_ref = 0; | |
2474 | return TRUE; | |
2475 | } | |
2476 | ||
3bf083ed | 2477 | /* If we don't find any dynamic relocs in read-only sections, then |
a3c62988 | 2478 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
5dbc8b37 | 2479 | if (!_bfd_elf_readonly_dynrelocs (eh)) |
a3c62988 NC |
2480 | { |
2481 | eh->non_got_ref = 0; | |
2482 | return TRUE; | |
2483 | } | |
2484 | ||
a3c62988 NC |
2485 | /* We must allocate the symbol in our .dynbss section, which will |
2486 | become part of the .bss section of the executable. There will be | |
2487 | an entry for this symbol in the .dynsym section. The dynamic | |
2488 | object will contain position independent code, so all references | |
2489 | from the dynamic object to this symbol will go through the global | |
2490 | offset table. The dynamic linker will use the .dynsym entry to | |
2491 | determine the address it must put in the global offset table, so | |
2492 | both the dynamic object and the regular object will refer to the | |
2493 | same memory location for the variable. */ | |
2494 | ||
2495 | htab = metag_link_hash_table (info); | |
2496 | ||
2497 | /* We must generate a COPY reloc to tell the dynamic linker to | |
2498 | copy the initial value out of the dynamic object and into the | |
2499 | runtime process image. */ | |
5474d94f AM |
2500 | if ((eh->root.u.def.section->flags & SEC_READONLY) != 0) |
2501 | { | |
2502 | s = htab->etab.sdynrelro; | |
2503 | srel = htab->etab.sreldynrelro; | |
2504 | } | |
2505 | else | |
2506 | { | |
2507 | s = htab->etab.sdynbss; | |
2508 | srel = htab->etab.srelbss; | |
2509 | } | |
34c67f14 | 2510 | if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0) |
a3c62988 | 2511 | { |
5474d94f | 2512 | srel->size += sizeof (Elf32_External_Rela); |
a3c62988 NC |
2513 | eh->needs_copy = 1; |
2514 | } | |
2515 | ||
6cabe1ea | 2516 | return _bfd_elf_adjust_dynamic_copy (info, eh, s); |
a3c62988 NC |
2517 | } |
2518 | ||
2519 | /* Allocate space in .plt, .got and associated reloc sections for | |
2520 | global syms. */ | |
2521 | ||
2522 | static bfd_boolean | |
2523 | allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf) | |
2524 | { | |
2525 | struct bfd_link_info *info; | |
2526 | struct elf_metag_link_hash_table *htab; | |
3bf083ed | 2527 | struct elf_dyn_relocs *hdh_p; |
a3c62988 NC |
2528 | |
2529 | if (eh->root.type == bfd_link_hash_indirect) | |
2530 | return TRUE; | |
2531 | ||
2532 | if (eh->root.type == bfd_link_hash_warning) | |
2533 | eh = (struct elf_link_hash_entry *) eh->root.u.i.link; | |
2534 | ||
2535 | info = inf; | |
2536 | htab = metag_link_hash_table (info); | |
2537 | ||
2538 | if (htab->etab.dynamic_sections_created | |
2539 | && eh->plt.refcount > 0) | |
2540 | { | |
2541 | /* Make sure this symbol is output as a dynamic symbol. | |
2542 | Undefined weak syms won't yet be marked as dynamic. */ | |
2543 | if (eh->dynindx == -1 | |
2544 | && !eh->forced_local) | |
2545 | { | |
2546 | if (! bfd_elf_link_record_dynamic_symbol (info, eh)) | |
2547 | return FALSE; | |
2548 | } | |
2549 | ||
0e1862bb | 2550 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh)) |
a3c62988 | 2551 | { |
ce558b89 | 2552 | asection *s = htab->etab.splt; |
a3c62988 NC |
2553 | |
2554 | /* If this is the first .plt entry, make room for the special | |
2555 | first entry. */ | |
2556 | if (s->size == 0) | |
2557 | s->size += PLT_ENTRY_SIZE; | |
2558 | ||
2559 | eh->plt.offset = s->size; | |
2560 | ||
2561 | /* If this symbol is not defined in a regular file, and we are | |
2562 | not generating a shared library, then set the symbol to this | |
2563 | location in the .plt. This is required to make function | |
2564 | pointers compare as equal between the normal executable and | |
2565 | the shared library. */ | |
0e1862bb | 2566 | if (! bfd_link_pic (info) |
a3c62988 NC |
2567 | && !eh->def_regular) |
2568 | { | |
2569 | eh->root.u.def.section = s; | |
2570 | eh->root.u.def.value = eh->plt.offset; | |
2571 | } | |
2572 | ||
2573 | /* Make room for this entry. */ | |
2574 | s->size += PLT_ENTRY_SIZE; | |
2575 | ||
2576 | /* We also need to make an entry in the .got.plt section, which | |
2577 | will be placed in the .got section by the linker script. */ | |
ce558b89 | 2578 | htab->etab.sgotplt->size += 4; |
a3c62988 NC |
2579 | |
2580 | /* We also need to make an entry in the .rel.plt section. */ | |
ce558b89 | 2581 | htab->etab.srelplt->size += sizeof (Elf32_External_Rela); |
a3c62988 NC |
2582 | } |
2583 | else | |
2584 | { | |
2585 | eh->plt.offset = (bfd_vma) -1; | |
2586 | eh->needs_plt = 0; | |
2587 | } | |
2588 | } | |
2589 | else | |
2590 | { | |
2591 | eh->plt.offset = (bfd_vma) -1; | |
2592 | eh->needs_plt = 0; | |
2593 | } | |
2594 | ||
2595 | if (eh->got.refcount > 0) | |
2596 | { | |
2597 | asection *s; | |
2598 | bfd_boolean dyn; | |
2599 | int tls_type = metag_elf_hash_entry (eh)->tls_type; | |
2600 | ||
2601 | /* Make sure this symbol is output as a dynamic symbol. | |
2602 | Undefined weak syms won't yet be marked as dynamic. */ | |
2603 | if (eh->dynindx == -1 | |
2604 | && !eh->forced_local) | |
2605 | { | |
2606 | if (! bfd_elf_link_record_dynamic_symbol (info, eh)) | |
2607 | return FALSE; | |
2608 | } | |
2609 | ||
ce558b89 | 2610 | s = htab->etab.sgot; |
a3c62988 NC |
2611 | |
2612 | eh->got.offset = s->size; | |
2613 | s->size += 4; | |
2614 | /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */ | |
2615 | if (tls_type == GOT_TLS_GD) | |
2616 | s->size += 4; | |
2617 | dyn = htab->etab.dynamic_sections_created; | |
2618 | /* R_METAG_TLS_IE needs one dynamic relocation if dynamic, | |
2619 | R_METAG_TLS_GD needs one if local symbol and two if global. */ | |
2620 | if ((tls_type == GOT_TLS_GD && eh->dynindx == -1) | |
2621 | || (tls_type == GOT_TLS_IE && dyn)) | |
ce558b89 | 2622 | htab->etab.srelgot->size += sizeof (Elf32_External_Rela); |
a3c62988 | 2623 | else if (tls_type == GOT_TLS_GD) |
ce558b89 | 2624 | htab->etab.srelgot->size += 2 * sizeof (Elf32_External_Rela); |
0e1862bb L |
2625 | else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
2626 | bfd_link_pic (info), | |
2627 | eh)) | |
ce558b89 | 2628 | htab->etab.srelgot->size += sizeof (Elf32_External_Rela); |
a3c62988 NC |
2629 | } |
2630 | else | |
2631 | eh->got.offset = (bfd_vma) -1; | |
2632 | ||
190eb1dd | 2633 | if (eh->dyn_relocs == NULL) |
a3c62988 NC |
2634 | return TRUE; |
2635 | ||
2636 | /* If this is a -Bsymbolic shared link, then we need to discard all | |
2637 | space allocated for dynamic pc-relative relocs against symbols | |
2638 | defined in a regular object. For the normal shared case, discard | |
2639 | space for relocs that have become local due to symbol visibility | |
2640 | changes. */ | |
0e1862bb | 2641 | if (bfd_link_pic (info)) |
a3c62988 NC |
2642 | { |
2643 | if (SYMBOL_CALLS_LOCAL (info, eh)) | |
2644 | { | |
3bf083ed | 2645 | struct elf_dyn_relocs **hdh_pp; |
a3c62988 | 2646 | |
190eb1dd | 2647 | for (hdh_pp = &eh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; ) |
a3c62988 | 2648 | { |
3bf083ed AM |
2649 | hdh_p->count -= hdh_p->pc_count; |
2650 | hdh_p->pc_count = 0; | |
a3c62988 | 2651 | if (hdh_p->count == 0) |
3bf083ed | 2652 | *hdh_pp = hdh_p->next; |
a3c62988 | 2653 | else |
3bf083ed | 2654 | hdh_pp = &hdh_p->next; |
a3c62988 NC |
2655 | } |
2656 | } | |
2657 | ||
2658 | /* Also discard relocs on undefined weak syms with non-default | |
2659 | visibility. */ | |
190eb1dd | 2660 | if (eh->dyn_relocs != NULL |
a3c62988 NC |
2661 | && eh->root.type == bfd_link_hash_undefweak) |
2662 | { | |
2663 | if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT) | |
190eb1dd | 2664 | eh->dyn_relocs = NULL; |
a3c62988 NC |
2665 | |
2666 | /* Make sure undefined weak symbols are output as a dynamic | |
2667 | symbol in PIEs. */ | |
2668 | else if (eh->dynindx == -1 | |
2669 | && !eh->forced_local) | |
2670 | { | |
2671 | if (! bfd_elf_link_record_dynamic_symbol (info, eh)) | |
2672 | return FALSE; | |
2673 | } | |
2674 | } | |
2675 | } | |
2676 | else | |
2677 | { | |
2678 | /* For the non-shared case, discard space for relocs against | |
2679 | symbols which turn out to need copy relocs or are not | |
2680 | dynamic. */ | |
2681 | if (!eh->non_got_ref | |
2682 | && ((eh->def_dynamic | |
2683 | && !eh->def_regular) | |
2684 | || (htab->etab.dynamic_sections_created | |
2685 | && (eh->root.type == bfd_link_hash_undefweak | |
2686 | || eh->root.type == bfd_link_hash_undefined)))) | |
2687 | { | |
2688 | /* Make sure this symbol is output as a dynamic symbol. | |
2689 | Undefined weak syms won't yet be marked as dynamic. */ | |
2690 | if (eh->dynindx == -1 | |
2691 | && !eh->forced_local) | |
2692 | { | |
2693 | if (! bfd_elf_link_record_dynamic_symbol (info, eh)) | |
2694 | return FALSE; | |
2695 | } | |
2696 | ||
2697 | /* If that succeeded, we know we'll be keeping all the | |
2698 | relocs. */ | |
2699 | if (eh->dynindx != -1) | |
2700 | goto keep; | |
2701 | } | |
2702 | ||
190eb1dd | 2703 | eh->dyn_relocs = NULL; |
a3c62988 NC |
2704 | return TRUE; |
2705 | ||
2706 | keep: ; | |
2707 | } | |
2708 | ||
2709 | /* Finally, allocate space. */ | |
190eb1dd | 2710 | for (hdh_p = eh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->next) |
a3c62988 NC |
2711 | { |
2712 | asection *sreloc = elf_section_data (hdh_p->sec)->sreloc; | |
2713 | sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela); | |
2714 | } | |
2715 | ||
2716 | return TRUE; | |
2717 | } | |
2718 | ||
a3c62988 NC |
2719 | /* Set the sizes of the dynamic sections. */ |
2720 | ||
2721 | static bfd_boolean | |
2722 | elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, | |
2723 | struct bfd_link_info *info) | |
2724 | { | |
2725 | struct elf_metag_link_hash_table *htab; | |
2726 | bfd *dynobj; | |
2727 | bfd *ibfd; | |
2728 | asection *s; | |
2729 | bfd_boolean relocs; | |
2730 | ||
2731 | htab = metag_link_hash_table (info); | |
2732 | dynobj = htab->etab.dynobj; | |
2733 | if (dynobj == NULL) | |
2734 | abort (); | |
2735 | ||
2736 | if (htab->etab.dynamic_sections_created) | |
2737 | { | |
2738 | /* Set the contents of the .interp section to the interpreter. */ | |
9b8b325a | 2739 | if (bfd_link_executable (info) && !info->nointerp) |
a3c62988 | 2740 | { |
ad1fc92a | 2741 | s = bfd_get_linker_section (dynobj, ".interp"); |
a3c62988 NC |
2742 | if (s == NULL) |
2743 | abort (); | |
2744 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
2745 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
2746 | } | |
2747 | } | |
2748 | ||
2749 | /* Set up .got offsets for local syms, and space for local dynamic | |
2750 | relocs. */ | |
c72f2fb2 | 2751 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
a3c62988 NC |
2752 | { |
2753 | bfd_signed_vma *local_got; | |
2754 | bfd_signed_vma *end_local_got; | |
2755 | bfd_size_type locsymcount; | |
2756 | Elf_Internal_Shdr *symtab_hdr; | |
2757 | asection *srel; | |
2758 | char *local_tls_type; | |
2759 | ||
2760 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
2761 | continue; | |
2762 | ||
2763 | for (s = ibfd->sections; s != NULL; s = s->next) | |
2764 | { | |
3bf083ed | 2765 | struct elf_dyn_relocs *hdh_p; |
a3c62988 | 2766 | |
3bf083ed | 2767 | for (hdh_p = ((struct elf_dyn_relocs *) |
a3c62988 NC |
2768 | elf_section_data (s)->local_dynrel); |
2769 | hdh_p != NULL; | |
3bf083ed | 2770 | hdh_p = hdh_p->next) |
a3c62988 NC |
2771 | { |
2772 | if (!bfd_is_abs_section (hdh_p->sec) | |
2773 | && bfd_is_abs_section (hdh_p->sec->output_section)) | |
2774 | { | |
2775 | /* Input section has been discarded, either because | |
2776 | it is a copy of a linkonce section or due to | |
2777 | linker script /DISCARD/, so we'll be discarding | |
2778 | the relocs too. */ | |
2779 | } | |
2780 | else if (hdh_p->count != 0) | |
2781 | { | |
2782 | srel = elf_section_data (hdh_p->sec)->sreloc; | |
2783 | srel->size += hdh_p->count * sizeof (Elf32_External_Rela); | |
2784 | if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0) | |
2785 | info->flags |= DF_TEXTREL; | |
2786 | } | |
2787 | } | |
2788 | } | |
2789 | ||
2790 | local_got = elf_local_got_refcounts (ibfd); | |
2791 | if (!local_got) | |
2792 | continue; | |
2793 | ||
2794 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2795 | locsymcount = symtab_hdr->sh_info; | |
2796 | end_local_got = local_got + locsymcount; | |
2797 | local_tls_type = metag_elf_local_got_tls_type (ibfd); | |
ce558b89 AM |
2798 | s = htab->etab.sgot; |
2799 | srel = htab->etab.srelgot; | |
a3c62988 NC |
2800 | for (; local_got < end_local_got; ++local_got) |
2801 | { | |
2802 | if (*local_got > 0) | |
2803 | { | |
2804 | *local_got = s->size; | |
2805 | s->size += GOT_ENTRY_SIZE; | |
2806 | /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */ | |
2807 | if (*local_tls_type == GOT_TLS_GD) | |
2808 | s->size += 4; | |
0e1862bb | 2809 | if (bfd_link_pic (info)) |
a3c62988 NC |
2810 | srel->size += sizeof (Elf32_External_Rela); |
2811 | } | |
2812 | else | |
2813 | *local_got = (bfd_vma) -1; | |
2814 | ++local_tls_type; | |
2815 | } | |
2816 | } | |
2817 | ||
2818 | if (htab->tls_ldm_got.refcount > 0) | |
2819 | { | |
2820 | /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM | |
2821 | reloc. */ | |
ce558b89 AM |
2822 | htab->tls_ldm_got.offset = htab->etab.sgot->size; |
2823 | htab->etab.sgot->size += 8; | |
2824 | htab->etab.srelgot->size += sizeof (Elf32_External_Rela); | |
a3c62988 NC |
2825 | } |
2826 | else | |
2827 | htab->tls_ldm_got.offset = -1; | |
2828 | ||
2829 | /* Allocate global sym .plt and .got entries, and space for global | |
2830 | sym dynamic relocs. */ | |
2831 | elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info); | |
2832 | ||
2833 | /* We now have determined the sizes of the various dynamic sections. | |
2834 | Allocate memory for them. */ | |
2835 | relocs = FALSE; | |
2836 | for (s = dynobj->sections; s != NULL; s = s->next) | |
2837 | { | |
2838 | bfd_boolean reloc_section = FALSE; | |
2839 | ||
2840 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2841 | continue; | |
2842 | ||
ce558b89 AM |
2843 | if (s == htab->etab.splt |
2844 | || s == htab->etab.sgot | |
2845 | || s == htab->etab.sgotplt | |
5474d94f AM |
2846 | || s == htab->etab.sdynbss |
2847 | || s == htab->etab.sdynrelro) | |
a3c62988 NC |
2848 | { |
2849 | /* Strip this section if we don't need it; see the | |
2850 | comment below. */ | |
2851 | } | |
fd361982 | 2852 | else if (CONST_STRNEQ (bfd_section_name (s), ".rela")) |
a3c62988 | 2853 | { |
ce558b89 | 2854 | if (s->size != 0 && s != htab->etab.srelplt) |
a3c62988 NC |
2855 | relocs = TRUE; |
2856 | ||
2857 | /* We use the reloc_count field as a counter if we need | |
2858 | to copy relocs into the output file. */ | |
2859 | s->reloc_count = 0; | |
2860 | reloc_section = TRUE; | |
2861 | } | |
2862 | else | |
2863 | { | |
2864 | /* It's not one of our sections, so don't allocate space. */ | |
2865 | continue; | |
2866 | } | |
2867 | ||
2868 | if (s->size == 0) | |
2869 | { | |
2870 | /* If we don't need this section, strip it from the | |
2871 | output file. This is mostly to handle .rela.bss and | |
2872 | .rela.plt. We must create both sections in | |
2873 | create_dynamic_sections, because they must be created | |
2874 | before the linker maps input sections to output | |
2875 | sections. The linker does that before | |
2876 | adjust_dynamic_symbol is called, and it is that | |
2877 | function which decides whether anything needs to go | |
2878 | into these sections. */ | |
2879 | s->flags |= SEC_EXCLUDE; | |
2880 | continue; | |
2881 | } | |
2882 | ||
2883 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
2884 | continue; | |
2885 | ||
2886 | /* Allocate memory for the section contents. */ | |
2887 | s->contents = bfd_zalloc (dynobj, s->size); | |
2888 | if (s->contents == NULL) | |
2889 | return FALSE; | |
2890 | else if (reloc_section) | |
2891 | { | |
2892 | unsigned char *contents = s->contents; | |
2893 | Elf32_External_Rela reloc; | |
2894 | ||
2895 | /* Fill the reloc section with a R_METAG_NONE type reloc. */ | |
2896 | memset(&reloc, 0, sizeof(Elf32_External_Rela)); | |
2897 | reloc.r_info[0] = R_METAG_NONE; | |
2898 | for (; contents < (s->contents + s->size); | |
2899 | contents += sizeof(Elf32_External_Rela)) | |
2900 | { | |
2901 | memcpy(contents, &reloc, sizeof(Elf32_External_Rela)); | |
2902 | } | |
2903 | } | |
2904 | } | |
2905 | ||
3084d7a2 | 2906 | return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs); |
a3c62988 NC |
2907 | } |
2908 | ||
2909 | /* Finish up dynamic symbol handling. We set the contents of various | |
2910 | dynamic sections here. */ | |
2911 | ||
2912 | static bfd_boolean | |
2913 | elf_metag_finish_dynamic_symbol (bfd *output_bfd, | |
2914 | struct bfd_link_info *info, | |
2915 | struct elf_link_hash_entry *eh, | |
2916 | Elf_Internal_Sym *sym) | |
2917 | { | |
2918 | struct elf_metag_link_hash_table *htab; | |
2919 | Elf_Internal_Rela rel; | |
2920 | bfd_byte *loc; | |
2921 | ||
2922 | htab = metag_link_hash_table (info); | |
2923 | ||
2924 | if (eh->plt.offset != (bfd_vma) -1) | |
2925 | { | |
2926 | asection *splt; | |
2927 | asection *sgot; | |
2928 | asection *srela; | |
2929 | ||
2930 | bfd_vma plt_index; | |
2931 | bfd_vma got_offset; | |
2932 | bfd_vma got_entry; | |
2933 | ||
2934 | if (eh->plt.offset & 1) | |
2935 | abort (); | |
2936 | ||
2937 | BFD_ASSERT (eh->dynindx != -1); | |
2938 | ||
ce558b89 AM |
2939 | splt = htab->etab.splt; |
2940 | sgot = htab->etab.sgotplt; | |
2941 | srela = htab->etab.srelplt; | |
a3c62988 NC |
2942 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); |
2943 | ||
2944 | /* Get the index in the procedure linkage table which | |
2945 | corresponds to this symbol. This is the index of this symbol | |
2946 | in all the symbols for which we are making plt entries. The | |
2947 | first entry in the procedure linkage table is reserved. */ | |
2948 | plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1; | |
2949 | ||
2950 | /* Get the offset into the .got.plt table of the entry that | |
2951 | corresponds to this function. */ | |
2952 | got_offset = plt_index * GOT_ENTRY_SIZE; | |
2953 | ||
2954 | BFD_ASSERT (got_offset < (1 << 16)); | |
2955 | ||
2956 | got_entry = sgot->output_section->vma | |
2957 | + sgot->output_offset | |
2958 | + got_offset; | |
2959 | ||
2960 | BFD_ASSERT (plt_index < (1 << 16)); | |
2961 | ||
2962 | /* Fill in the entry in the procedure linkage table. */ | |
0e1862bb | 2963 | if (! bfd_link_pic (info)) |
a3c62988 NC |
2964 | { |
2965 | bfd_put_32 (output_bfd, | |
2966 | (plt_entry[0] | |
2967 | | (((got_entry >> 16) & 0xffff) << 3)), | |
2968 | splt->contents + eh->plt.offset); | |
2969 | bfd_put_32 (output_bfd, | |
2970 | (plt_entry[1] | |
2971 | | ((got_entry & 0xffff) << 3)), | |
2972 | splt->contents + eh->plt.offset + 4); | |
2973 | bfd_put_32 (output_bfd, plt_entry[2], | |
2974 | splt->contents + eh->plt.offset + 8); | |
2975 | bfd_put_32 (output_bfd, | |
2976 | (plt_entry[3] | (plt_index << 3)), | |
2977 | splt->contents + eh->plt.offset + 12); | |
2978 | bfd_put_32 (output_bfd, | |
2979 | (plt_entry[4] | |
2980 | | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)), | |
2981 | splt->contents + eh->plt.offset + 16); | |
2982 | } | |
2983 | else | |
2984 | { | |
2985 | bfd_vma addr = got_entry - (splt->output_section->vma + | |
2986 | splt->output_offset + eh->plt.offset); | |
2987 | ||
2988 | bfd_put_32 (output_bfd, | |
2989 | plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3), | |
2990 | splt->contents + eh->plt.offset); | |
2991 | bfd_put_32 (output_bfd, | |
2992 | plt_pic_entry[1] | ((addr & 0xffff) << 3), | |
2993 | splt->contents + eh->plt.offset + 4); | |
2994 | bfd_put_32 (output_bfd, plt_pic_entry[2], | |
2995 | splt->contents + eh->plt.offset + 8); | |
2996 | bfd_put_32 (output_bfd, | |
2997 | (plt_pic_entry[3] | (plt_index << 3)), | |
2998 | splt->contents + eh->plt.offset + 12); | |
2999 | bfd_put_32 (output_bfd, | |
3000 | (plt_pic_entry[4] | |
3001 | + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)), | |
3002 | splt->contents + eh->plt.offset + 16); | |
3003 | } | |
3004 | ||
3005 | /* Fill in the entry in the global offset table. */ | |
3006 | bfd_put_32 (output_bfd, | |
3007 | (splt->output_section->vma | |
3008 | + splt->output_offset | |
3009 | + eh->plt.offset | |
3010 | + 12), /* offset within PLT entry */ | |
3011 | sgot->contents + got_offset); | |
3012 | ||
3013 | /* Fill in the entry in the .rela.plt section. */ | |
3014 | rel.r_offset = (sgot->output_section->vma | |
3015 | + sgot->output_offset | |
3016 | + got_offset); | |
3017 | rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT); | |
3018 | rel.r_addend = 0; | |
ce558b89 | 3019 | loc = htab->etab.srelplt->contents; |
a3c62988 NC |
3020 | loc += plt_index * sizeof(Elf32_External_Rela); |
3021 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
3022 | ||
3023 | if (!eh->def_regular) | |
3024 | { | |
3025 | /* Mark the symbol as undefined, rather than as defined in | |
3026 | the .plt section. Leave the value alone. */ | |
3027 | sym->st_shndx = SHN_UNDEF; | |
3028 | } | |
3029 | } | |
3030 | ||
3031 | if (eh->got.offset != (bfd_vma) -1 | |
3032 | && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0 | |
3033 | && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0) | |
3034 | { | |
3035 | /* This symbol has an entry in the global offset table. Set it | |
3036 | up. */ | |
3037 | ||
3038 | rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1) | |
ce558b89 AM |
3039 | + htab->etab.sgot->output_offset |
3040 | + htab->etab.sgot->output_section->vma); | |
a3c62988 NC |
3041 | |
3042 | /* If this is a -Bsymbolic link and the symbol is defined | |
3043 | locally or was forced to be local because of a version file, | |
3044 | we just want to emit a RELATIVE reloc. The entry in the | |
3045 | global offset table will already have been initialized in the | |
3046 | relocate_section function. */ | |
0e1862bb | 3047 | if (bfd_link_pic (info) |
a3c62988 NC |
3048 | && (info->symbolic || eh->dynindx == -1) |
3049 | && eh->def_regular) | |
3050 | { | |
3051 | rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE); | |
3052 | rel.r_addend = (eh->root.u.def.value | |
3053 | + eh->root.u.def.section->output_offset | |
3054 | + eh->root.u.def.section->output_section->vma); | |
3055 | } | |
3056 | else | |
3057 | { | |
3058 | if ((eh->got.offset & 1) != 0) | |
3059 | abort (); | |
ce558b89 | 3060 | bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + eh->got.offset); |
a3c62988 NC |
3061 | rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT); |
3062 | rel.r_addend = 0; | |
3063 | } | |
3064 | ||
ce558b89 AM |
3065 | loc = htab->etab.srelgot->contents; |
3066 | loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
a3c62988 NC |
3067 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
3068 | } | |
3069 | ||
3070 | if (eh->needs_copy) | |
3071 | { | |
3072 | asection *s; | |
3073 | ||
3074 | /* This symbol needs a copy reloc. Set it up. */ | |
3075 | ||
3076 | if (! (eh->dynindx != -1 | |
3077 | && (eh->root.type == bfd_link_hash_defined | |
3078 | || eh->root.type == bfd_link_hash_defweak))) | |
3079 | abort (); | |
3080 | ||
a3c62988 NC |
3081 | rel.r_offset = (eh->root.u.def.value |
3082 | + eh->root.u.def.section->output_offset | |
3083 | + eh->root.u.def.section->output_section->vma); | |
3084 | rel.r_addend = 0; | |
3085 | rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY); | |
afbf7e8e | 3086 | if (eh->root.u.def.section == htab->etab.sdynrelro) |
5474d94f AM |
3087 | s = htab->etab.sreldynrelro; |
3088 | else | |
3089 | s = htab->etab.srelbss; | |
a3c62988 NC |
3090 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
3091 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
3092 | } | |
3093 | ||
3094 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
3095 | if (eh->root.root.string[0] == '_' | |
3096 | && (strcmp (eh->root.root.string, "_DYNAMIC") == 0 | |
3097 | || eh == htab->etab.hgot)) | |
3098 | { | |
3099 | sym->st_shndx = SHN_ABS; | |
3100 | } | |
3101 | ||
3102 | return TRUE; | |
3103 | } | |
3104 | ||
3105 | /* Set the Meta ELF ABI version. */ | |
3106 | ||
ed7e9d0b AM |
3107 | static bfd_boolean |
3108 | elf_metag_init_file_header (bfd *abfd, struct bfd_link_info *link_info) | |
a3c62988 NC |
3109 | { |
3110 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ | |
3111 | ||
ed7e9d0b AM |
3112 | if (!_bfd_elf_init_file_header (abfd, link_info)) |
3113 | return FALSE; | |
3114 | ||
a3c62988 NC |
3115 | i_ehdrp = elf_elfheader (abfd); |
3116 | i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION; | |
ed7e9d0b | 3117 | return TRUE; |
a3c62988 NC |
3118 | } |
3119 | ||
3120 | /* Used to decide how to sort relocs in an optimal manner for the | |
3121 | dynamic linker, before writing them out. */ | |
3122 | ||
3123 | static enum elf_reloc_type_class | |
7e612e98 AM |
3124 | elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
3125 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
3126 | const Elf_Internal_Rela *rela) | |
a3c62988 NC |
3127 | { |
3128 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
3129 | { | |
3130 | case R_METAG_RELATIVE: | |
3131 | return reloc_class_relative; | |
3132 | case R_METAG_JMP_SLOT: | |
3133 | return reloc_class_plt; | |
3134 | case R_METAG_COPY: | |
3135 | return reloc_class_copy; | |
3136 | default: | |
3137 | return reloc_class_normal; | |
3138 | } | |
3139 | } | |
3140 | ||
3141 | /* Finish up the dynamic sections. */ | |
3142 | ||
3143 | static bfd_boolean | |
3144 | elf_metag_finish_dynamic_sections (bfd *output_bfd, | |
3145 | struct bfd_link_info *info) | |
3146 | { | |
3147 | bfd *dynobj; | |
3148 | struct elf_metag_link_hash_table *htab; | |
3149 | asection *sdyn; | |
3150 | ||
3151 | htab = metag_link_hash_table (info); | |
3152 | dynobj = htab->etab.dynobj; | |
3153 | ||
ad1fc92a | 3154 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
a3c62988 NC |
3155 | |
3156 | if (htab->etab.dynamic_sections_created) | |
3157 | { | |
3158 | asection *splt; | |
3159 | Elf32_External_Dyn *dyncon, *dynconend; | |
3160 | ||
3161 | if (sdyn == NULL) | |
3162 | abort (); | |
3163 | ||
3164 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
3165 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); | |
3166 | for (; dyncon < dynconend; dyncon++) | |
3167 | { | |
3168 | Elf_Internal_Dyn dyn; | |
3169 | asection *s; | |
3170 | ||
3171 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
3172 | ||
3173 | switch (dyn.d_tag) | |
3174 | { | |
3175 | default: | |
3176 | continue; | |
3177 | ||
3178 | case DT_PLTGOT: | |
ce558b89 | 3179 | s = htab->etab.sgot; |
4ade44b7 | 3180 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
a3c62988 NC |
3181 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
3182 | break; | |
3183 | ||
3184 | case DT_JMPREL: | |
ce558b89 | 3185 | s = htab->etab.srelplt; |
4ade44b7 | 3186 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
a3c62988 NC |
3187 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
3188 | break; | |
3189 | ||
3190 | case DT_PLTRELSZ: | |
ce558b89 | 3191 | s = htab->etab.srelplt; |
a3c62988 NC |
3192 | dyn.d_un.d_val = s->size; |
3193 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3194 | break; | |
a3c62988 NC |
3195 | } |
3196 | ||
3197 | } | |
3198 | ||
3199 | /* Fill in the first entry in the procedure linkage table. */ | |
ce558b89 | 3200 | splt = htab->etab.splt; |
a3c62988 NC |
3201 | if (splt && splt->size > 0) |
3202 | { | |
3203 | unsigned long addr; | |
3204 | /* addr = .got + 4 */ | |
ce558b89 AM |
3205 | addr = (htab->etab.sgot->output_section->vma |
3206 | + htab->etab.sgot->output_offset + 4); | |
0e1862bb | 3207 | if (bfd_link_pic (info)) |
a3c62988 NC |
3208 | { |
3209 | addr -= splt->output_section->vma + splt->output_offset; | |
3210 | bfd_put_32 (output_bfd, | |
3211 | plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3), | |
3212 | splt->contents); | |
3213 | bfd_put_32 (output_bfd, | |
3214 | plt0_pic_entry[1] | ((addr & 0xffff) << 3), | |
3215 | splt->contents + 4); | |
3216 | bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8); | |
3217 | bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12); | |
3218 | bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16); | |
3219 | } | |
3220 | else | |
3221 | { | |
3222 | bfd_put_32 (output_bfd, | |
3223 | plt0_entry[0] | (((addr >> 16) & 0xffff) << 3), | |
3224 | splt->contents); | |
3225 | bfd_put_32 (output_bfd, | |
3226 | plt0_entry[1] | ((addr & 0xffff) << 3), | |
3227 | splt->contents + 4); | |
3228 | bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8); | |
3229 | bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12); | |
3230 | bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16); | |
3231 | } | |
3232 | ||
3233 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = | |
3234 | PLT_ENTRY_SIZE; | |
3235 | } | |
3236 | } | |
3237 | ||
ce558b89 | 3238 | if (htab->etab.sgot != NULL && htab->etab.sgot->size != 0) |
a3c62988 NC |
3239 | { |
3240 | /* Fill in the first entry in the global offset table. | |
3241 | We use it to point to our dynamic section, if we have one. */ | |
3242 | bfd_put_32 (output_bfd, | |
3243 | sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0, | |
ce558b89 | 3244 | htab->etab.sgot->contents); |
a3c62988 NC |
3245 | |
3246 | /* The second entry is reserved for use by the dynamic linker. */ | |
ce558b89 | 3247 | memset (htab->etab.sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE); |
a3c62988 NC |
3248 | |
3249 | /* Set .got entry size. */ | |
ce558b89 | 3250 | elf_section_data (htab->etab.sgot->output_section) |
a3c62988 NC |
3251 | ->this_hdr.sh_entsize = GOT_ENTRY_SIZE; |
3252 | } | |
3253 | ||
3254 | return TRUE; | |
3255 | } | |
3256 | ||
3257 | /* Return the section that should be marked against GC for a given | |
3258 | relocation. */ | |
3259 | ||
3260 | static asection * | |
3261 | elf_metag_gc_mark_hook (asection *sec, | |
3262 | struct bfd_link_info *info, | |
3263 | Elf_Internal_Rela *rela, | |
3264 | struct elf_link_hash_entry *hh, | |
3265 | Elf_Internal_Sym *sym) | |
3266 | { | |
3267 | if (hh != NULL) | |
3268 | switch ((unsigned int) ELF32_R_TYPE (rela->r_info)) | |
3269 | { | |
3270 | case R_METAG_GNU_VTINHERIT: | |
3271 | case R_METAG_GNU_VTENTRY: | |
3272 | return NULL; | |
3273 | } | |
3274 | ||
3275 | return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym); | |
3276 | } | |
3277 | ||
a3c62988 NC |
3278 | /* Determine the type of stub needed, if any, for a call. */ |
3279 | ||
3280 | static enum elf_metag_stub_type | |
3281 | metag_type_of_stub (asection *input_sec, | |
3282 | const Elf_Internal_Rela *rel, | |
3283 | struct elf_metag_link_hash_entry *hh, | |
3284 | bfd_vma destination, | |
3285 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3286 | { | |
3287 | bfd_vma location; | |
3288 | bfd_vma branch_offset; | |
3289 | bfd_vma max_branch_offset; | |
3290 | ||
3291 | if (hh != NULL && | |
3292 | !(hh->eh.root.type == bfd_link_hash_defined | |
3293 | || hh->eh.root.type == bfd_link_hash_defweak)) | |
3294 | return metag_stub_none; | |
3295 | ||
3296 | /* Determine where the call point is. */ | |
3297 | location = (input_sec->output_offset | |
3298 | + input_sec->output_section->vma | |
3299 | + rel->r_offset); | |
3300 | ||
3301 | branch_offset = destination - location; | |
3302 | ||
3303 | /* Determine if a long branch stub is needed. Meta branch offsets | |
3304 | are signed 19 bits 4 byte aligned. */ | |
3305 | max_branch_offset = (1 << (BRANCH_BITS-1)) << 2; | |
3306 | ||
3307 | if (branch_offset + max_branch_offset >= 2*max_branch_offset) | |
3308 | { | |
0e1862bb | 3309 | if (bfd_link_pic (info)) |
a3c62988 NC |
3310 | return metag_stub_long_branch_shared; |
3311 | else | |
3312 | return metag_stub_long_branch; | |
3313 | } | |
3314 | ||
3315 | return metag_stub_none; | |
3316 | } | |
3317 | ||
3318 | #define MOVT_A0_3 0x82180005 | |
3319 | #define JUMP_A0_3 0xac180003 | |
3320 | ||
3321 | #define MOVT_A1LBP 0x83080005 | |
3322 | #define ADD_A1LBP 0x83080000 | |
3323 | ||
3324 | #define ADDT_A0_3_CPC 0x82980001 | |
3325 | #define ADD_A0_3_A0_3 0x82180000 | |
3326 | #define MOV_PC_A0_3 0xa3180ca0 | |
3327 | ||
3328 | static bfd_boolean | |
abf874aa | 3329 | metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
a3c62988 NC |
3330 | { |
3331 | struct elf_metag_stub_hash_entry *hsh; | |
3332 | asection *stub_sec; | |
3333 | bfd *stub_bfd; | |
3334 | bfd_byte *loc; | |
3335 | bfd_vma sym_value; | |
3336 | int size; | |
abf874aa | 3337 | struct bfd_link_info *info; |
a3c62988 NC |
3338 | |
3339 | /* Massage our args to the form they really have. */ | |
3340 | hsh = (struct elf_metag_stub_hash_entry *) gen_entry; | |
abf874aa CL |
3341 | info = (struct bfd_link_info *) in_arg; |
3342 | ||
3343 | /* Fail if the target section could not be assigned to an output | |
3344 | section. The user should fix his linker script. */ | |
3345 | if (hsh->target_section->output_section == NULL | |
3346 | && info->non_contiguous_regions) | |
53215f21 CL |
3347 | info->callbacks->einfo (_("%F%P: Could not assign '%pA' to an output section. " |
3348 | "Retry without --enable-non-contiguous-regions.\n"), | |
3349 | hsh->target_section); | |
a3c62988 NC |
3350 | |
3351 | stub_sec = hsh->stub_sec; | |
3352 | ||
3353 | /* Make a note of the offset within the stubs for this entry. */ | |
3354 | hsh->stub_offset = stub_sec->size; | |
3355 | loc = stub_sec->contents + hsh->stub_offset; | |
3356 | ||
3357 | stub_bfd = stub_sec->owner; | |
3358 | ||
3359 | switch (hsh->stub_type) | |
3360 | { | |
3361 | case metag_stub_long_branch_shared: | |
3362 | /* A PIC long branch stub is an ADDT and an ADD instruction used to | |
3363 | calculate the jump target using A0.3 as a temporary. Then a MOV | |
3364 | to PC carries out the jump. */ | |
3365 | sym_value = (hsh->target_value | |
3366 | + hsh->target_section->output_offset | |
3367 | + hsh->target_section->output_section->vma | |
3368 | + hsh->addend); | |
3369 | ||
3370 | sym_value -= (hsh->stub_offset | |
3371 | + stub_sec->output_offset | |
3372 | + stub_sec->output_section->vma); | |
3373 | ||
3374 | bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3), | |
3375 | loc); | |
3376 | ||
3377 | bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3), | |
3378 | loc + 4); | |
3379 | ||
3380 | bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8); | |
3381 | ||
3382 | size = 12; | |
3383 | break; | |
3384 | case metag_stub_long_branch: | |
3385 | /* A standard long branch stub is a MOVT instruction followed by a | |
3386 | JUMP instruction using the A0.3 register as a temporary. This is | |
3387 | the same method used by the LDLK linker (patch.c). */ | |
3388 | sym_value = (hsh->target_value | |
3389 | + hsh->target_section->output_offset | |
3390 | + hsh->target_section->output_section->vma | |
3391 | + hsh->addend); | |
3392 | ||
3393 | bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3), | |
3394 | loc); | |
3395 | ||
3396 | bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4); | |
3397 | ||
3398 | size = 8; | |
3399 | break; | |
3400 | default: | |
3401 | BFD_FAIL (); | |
3402 | return FALSE; | |
3403 | } | |
3404 | ||
3405 | stub_sec->size += size; | |
3406 | return TRUE; | |
3407 | } | |
3408 | ||
3409 | /* As above, but don't actually build the stub. Just bump offset so | |
3410 | we know stub section sizes. */ | |
3411 | ||
3412 | static bfd_boolean | |
3413 | metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED) | |
3414 | { | |
3415 | struct elf_metag_stub_hash_entry *hsh; | |
3416 | int size = 0; | |
3417 | ||
3418 | /* Massage our args to the form they really have. */ | |
3419 | hsh = (struct elf_metag_stub_hash_entry *) gen_entry; | |
3420 | ||
3421 | if (hsh->stub_type == metag_stub_long_branch) | |
3422 | size = 8; | |
3423 | else if (hsh->stub_type == metag_stub_long_branch_shared) | |
3424 | size = 12; | |
3425 | ||
3426 | hsh->stub_sec->size += size; | |
3427 | return TRUE; | |
3428 | } | |
3429 | ||
3430 | /* Set up various things so that we can make a list of input sections | |
3431 | for each output section included in the link. Returns -1 on error, | |
3432 | 0 when no stubs will be needed, and 1 on success. */ | |
3433 | ||
3434 | int | |
3435 | elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) | |
3436 | { | |
3437 | bfd *input_bfd; | |
3438 | unsigned int bfd_count; | |
7292b3ac | 3439 | unsigned int top_id, top_index; |
a3c62988 NC |
3440 | asection *section; |
3441 | asection **input_list, **list; | |
986f0783 | 3442 | size_t amt; |
a3c62988 NC |
3443 | struct elf_metag_link_hash_table *htab = metag_link_hash_table (info); |
3444 | ||
3445 | /* Count the number of input BFDs and find the top input section id. */ | |
3446 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
3447 | input_bfd != NULL; | |
c72f2fb2 | 3448 | input_bfd = input_bfd->link.next) |
a3c62988 NC |
3449 | { |
3450 | bfd_count += 1; | |
3451 | for (section = input_bfd->sections; | |
3452 | section != NULL; | |
3453 | section = section->next) | |
3454 | { | |
3455 | if (top_id < section->id) | |
3456 | top_id = section->id; | |
3457 | } | |
3458 | } | |
3459 | ||
3460 | htab->bfd_count = bfd_count; | |
3461 | ||
3462 | amt = sizeof (struct map_stub) * (top_id + 1); | |
3463 | htab->stub_group = bfd_zmalloc (amt); | |
3464 | if (htab->stub_group == NULL) | |
3465 | return -1; | |
3466 | ||
3467 | /* We can't use output_bfd->section_count here to find the top output | |
3468 | section index as some sections may have been removed, and | |
3469 | strip_excluded_output_sections doesn't renumber the indices. */ | |
3470 | for (section = output_bfd->sections, top_index = 0; | |
3471 | section != NULL; | |
3472 | section = section->next) | |
3473 | { | |
3474 | if (top_index < section->index) | |
3475 | top_index = section->index; | |
3476 | } | |
3477 | ||
3478 | htab->top_index = top_index; | |
3479 | amt = sizeof (asection *) * (top_index + 1); | |
3480 | input_list = bfd_malloc (amt); | |
3481 | htab->input_list = input_list; | |
3482 | if (input_list == NULL) | |
3483 | return -1; | |
3484 | ||
3485 | /* For sections we aren't interested in, mark their entries with a | |
3486 | value we can check later. */ | |
3487 | list = input_list + top_index; | |
3488 | do | |
3489 | *list = bfd_abs_section_ptr; | |
3490 | while (list-- != input_list); | |
3491 | ||
3492 | for (section = output_bfd->sections; | |
3493 | section != NULL; | |
3494 | section = section->next) | |
3495 | { | |
3496 | /* FIXME: This is a bit of hack. Currently our .ctors and .dtors | |
3497 | * have PC relative relocs in them but no code flag set. */ | |
3498 | if (((section->flags & SEC_CODE) != 0) || | |
3499 | strcmp(".ctors", section->name) || | |
3500 | strcmp(".dtors", section->name)) | |
3501 | input_list[section->index] = NULL; | |
3502 | } | |
3503 | ||
3504 | return 1; | |
3505 | } | |
3506 | ||
3507 | /* The linker repeatedly calls this function for each input section, | |
3508 | in the order that input sections are linked into output sections. | |
3509 | Build lists of input sections to determine groupings between which | |
3510 | we may insert linker stubs. */ | |
3511 | ||
3512 | void | |
3513 | elf_metag_next_input_section (struct bfd_link_info *info, asection *isec) | |
3514 | { | |
3515 | struct elf_metag_link_hash_table *htab = metag_link_hash_table (info); | |
3516 | ||
3517 | if (isec->output_section->index <= htab->top_index) | |
3518 | { | |
3519 | asection **list = htab->input_list + isec->output_section->index; | |
3520 | if (*list != bfd_abs_section_ptr) | |
3521 | { | |
3522 | /* Steal the link_sec pointer for our list. */ | |
3523 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) | |
3524 | /* This happens to make the list in reverse order, | |
3525 | which is what we want. */ | |
3526 | PREV_SEC (isec) = *list; | |
3527 | *list = isec; | |
3528 | } | |
3529 | } | |
3530 | } | |
3531 | ||
3532 | /* See whether we can group stub sections together. Grouping stub | |
3533 | sections may result in fewer stubs. More importantly, we need to | |
3534 | put all .init* and .fini* stubs at the beginning of the .init or | |
3535 | .fini output sections respectively, because glibc splits the | |
3536 | _init and _fini functions into multiple parts. Putting a stub in | |
3537 | the middle of a function is not a good idea. */ | |
3538 | ||
3539 | static void | |
3540 | group_sections (struct elf_metag_link_hash_table *htab, | |
3541 | bfd_size_type stub_group_size, | |
3542 | bfd_boolean stubs_always_before_branch) | |
3543 | { | |
3544 | asection **list = htab->input_list + htab->top_index; | |
3545 | do | |
3546 | { | |
3547 | asection *tail = *list; | |
3548 | if (tail == bfd_abs_section_ptr) | |
3549 | continue; | |
3550 | while (tail != NULL) | |
3551 | { | |
3552 | asection *curr; | |
3553 | asection *prev; | |
3554 | bfd_size_type total; | |
3555 | bfd_boolean big_sec; | |
3556 | ||
3557 | curr = tail; | |
3558 | total = tail->size; | |
3559 | big_sec = total >= stub_group_size; | |
3560 | ||
3561 | while ((prev = PREV_SEC (curr)) != NULL | |
3562 | && ((total += curr->output_offset - prev->output_offset) | |
3563 | < stub_group_size)) | |
3564 | curr = prev; | |
3565 | ||
3566 | /* OK, the size from the start of CURR to the end is less | |
3567 | than stub_group_size bytes and thus can be handled by one stub | |
3568 | section. (or the tail section is itself larger than | |
3569 | stub_group_size bytes, in which case we may be toast.) | |
3570 | We should really be keeping track of the total size of | |
3571 | stubs added here, as stubs contribute to the final output | |
3572 | section size. */ | |
3573 | do | |
3574 | { | |
3575 | prev = PREV_SEC (tail); | |
3576 | /* Set up this stub group. */ | |
3577 | htab->stub_group[tail->id].link_sec = curr; | |
3578 | } | |
3579 | while (tail != curr && (tail = prev) != NULL); | |
3580 | ||
3581 | /* But wait, there's more! Input sections up to stub_group_size | |
3582 | bytes before the stub section can be handled by it too. | |
3583 | Don't do this if we have a really large section after the | |
3584 | stubs, as adding more stubs increases the chance that | |
3585 | branches may not reach into the stub section. */ | |
3586 | if (!stubs_always_before_branch && !big_sec) | |
3587 | { | |
3588 | total = 0; | |
3589 | while (prev != NULL | |
3590 | && ((total += tail->output_offset - prev->output_offset) | |
3591 | < stub_group_size)) | |
3592 | { | |
3593 | tail = prev; | |
3594 | prev = PREV_SEC (tail); | |
3595 | htab->stub_group[tail->id].link_sec = curr; | |
3596 | } | |
3597 | } | |
3598 | tail = prev; | |
3599 | } | |
3600 | } | |
3601 | while (list-- != htab->input_list); | |
3602 | free (htab->input_list); | |
3603 | #undef PREV_SEC | |
3604 | } | |
3605 | ||
3606 | /* Read in all local syms for all input bfds. | |
3607 | Returns -1 on error, 0 otherwise. */ | |
3608 | ||
3609 | static int | |
3610 | get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd, | |
3611 | struct bfd_link_info *info) | |
3612 | { | |
3613 | unsigned int bfd_indx; | |
3614 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
3615 | int stub_changed = 0; | |
3616 | struct elf_metag_link_hash_table *htab = metag_link_hash_table (info); | |
3617 | ||
3618 | /* We want to read in symbol extension records only once. To do this | |
3619 | we need to read in the local symbols in parallel and save them for | |
3620 | later use; so hold pointers to the local symbols in an array. */ | |
986f0783 | 3621 | size_t amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; |
a3c62988 NC |
3622 | all_local_syms = bfd_zmalloc (amt); |
3623 | htab->all_local_syms = all_local_syms; | |
3624 | if (all_local_syms == NULL) | |
3625 | return -1; | |
3626 | ||
3627 | /* Walk over all the input BFDs, swapping in local symbols. */ | |
3628 | for (bfd_indx = 0; | |
3629 | input_bfd != NULL; | |
c72f2fb2 | 3630 | input_bfd = input_bfd->link.next, bfd_indx++) |
a3c62988 NC |
3631 | { |
3632 | Elf_Internal_Shdr *symtab_hdr; | |
3633 | ||
3634 | /* We'll need the symbol table in a second. */ | |
3635 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
3636 | if (symtab_hdr->sh_info == 0) | |
3637 | continue; | |
3638 | ||
3639 | /* We need an array of the local symbols attached to the input bfd. */ | |
3640 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
3641 | if (local_syms == NULL) | |
3642 | { | |
3643 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
3644 | symtab_hdr->sh_info, 0, | |
3645 | NULL, NULL, NULL); | |
3646 | /* Cache them for elf_link_input_bfd. */ | |
3647 | symtab_hdr->contents = (unsigned char *) local_syms; | |
3648 | } | |
3649 | if (local_syms == NULL) | |
3650 | return -1; | |
3651 | ||
3652 | all_local_syms[bfd_indx] = local_syms; | |
3653 | } | |
3654 | ||
3655 | return stub_changed; | |
3656 | } | |
3657 | ||
3658 | /* Determine and set the size of the stub section for a final link. | |
3659 | ||
3660 | The basic idea here is to examine all the relocations looking for | |
3661 | PC-relative calls to a target that is unreachable with a "CALLR" | |
3662 | instruction. */ | |
3663 | ||
3664 | /* See elf32-hppa.c and elf64-ppc.c. */ | |
3665 | ||
3666 | bfd_boolean | |
3667 | elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd, | |
3668 | struct bfd_link_info *info, | |
3669 | bfd_signed_vma group_size, | |
3670 | asection * (*add_stub_section) (const char *, asection *), | |
3671 | void (*layout_sections_again) (void)) | |
3672 | { | |
3673 | bfd_size_type stub_group_size; | |
3674 | bfd_boolean stubs_always_before_branch; | |
3675 | bfd_boolean stub_changed; | |
3676 | struct elf_metag_link_hash_table *htab = metag_link_hash_table (info); | |
3677 | ||
3678 | /* Stash our params away. */ | |
3679 | htab->stub_bfd = stub_bfd; | |
3680 | htab->add_stub_section = add_stub_section; | |
3681 | htab->layout_sections_again = layout_sections_again; | |
3682 | stubs_always_before_branch = group_size < 0; | |
3683 | if (group_size < 0) | |
3684 | stub_group_size = -group_size; | |
3685 | else | |
3686 | stub_group_size = group_size; | |
3687 | if (stub_group_size == 1) | |
3688 | { | |
3689 | /* Default values. */ | |
3690 | /* FIXME: not sure what these values should be */ | |
3691 | if (stubs_always_before_branch) | |
3692 | { | |
3693 | stub_group_size = (1 << BRANCH_BITS); | |
3694 | } | |
3695 | else | |
3696 | { | |
3697 | stub_group_size = (1 << BRANCH_BITS); | |
3698 | } | |
3699 | } | |
3700 | ||
3701 | group_sections (htab, stub_group_size, stubs_always_before_branch); | |
3702 | ||
3703 | switch (get_local_syms (output_bfd, info->input_bfds, info)) | |
3704 | { | |
3705 | default: | |
3706 | if (htab->all_local_syms) | |
3707 | goto error_ret_free_local; | |
3708 | return FALSE; | |
3709 | ||
3710 | case 0: | |
3711 | stub_changed = FALSE; | |
3712 | break; | |
3713 | ||
3714 | case 1: | |
3715 | stub_changed = TRUE; | |
3716 | break; | |
3717 | } | |
3718 | ||
3719 | while (1) | |
3720 | { | |
3721 | bfd *input_bfd; | |
3722 | unsigned int bfd_indx; | |
3723 | asection *stub_sec; | |
3724 | ||
3725 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
3726 | input_bfd != NULL; | |
c72f2fb2 | 3727 | input_bfd = input_bfd->link.next, bfd_indx++) |
a3c62988 NC |
3728 | { |
3729 | Elf_Internal_Shdr *symtab_hdr; | |
3730 | asection *section; | |
3731 | Elf_Internal_Sym *local_syms; | |
3732 | ||
3733 | /* We'll need the symbol table in a second. */ | |
3734 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
3735 | if (symtab_hdr->sh_info == 0) | |
3736 | continue; | |
3737 | ||
3738 | local_syms = htab->all_local_syms[bfd_indx]; | |
3739 | ||
3740 | /* Walk over each section attached to the input bfd. */ | |
3741 | for (section = input_bfd->sections; | |
3742 | section != NULL; | |
3743 | section = section->next) | |
3744 | { | |
3745 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
3746 | ||
3747 | /* If there aren't any relocs, then there's nothing more | |
3748 | to do. */ | |
3749 | if ((section->flags & SEC_RELOC) == 0 | |
3750 | || section->reloc_count == 0) | |
3751 | continue; | |
3752 | ||
3753 | /* If this section is a link-once section that will be | |
3754 | discarded, then don't create any stubs. */ | |
3755 | if (section->output_section == NULL | |
3756 | || section->output_section->owner != output_bfd) | |
3757 | continue; | |
3758 | ||
3759 | /* Get the relocs. */ | |
3760 | internal_relocs | |
3761 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, | |
3762 | info->keep_memory); | |
3763 | if (internal_relocs == NULL) | |
3764 | goto error_ret_free_local; | |
3765 | ||
3766 | /* Now examine each relocation. */ | |
3767 | irela = internal_relocs; | |
3768 | irelaend = irela + section->reloc_count; | |
3769 | for (; irela < irelaend; irela++) | |
3770 | { | |
3771 | unsigned int r_type, r_indx; | |
3772 | enum elf_metag_stub_type stub_type; | |
3773 | struct elf_metag_stub_hash_entry *hsh; | |
3774 | asection *sym_sec; | |
3775 | bfd_vma sym_value; | |
3776 | bfd_vma destination; | |
3777 | struct elf_metag_link_hash_entry *hh; | |
3778 | char *stub_name; | |
3779 | const asection *id_sec; | |
3780 | ||
3781 | r_type = ELF32_R_TYPE (irela->r_info); | |
3782 | r_indx = ELF32_R_SYM (irela->r_info); | |
3783 | ||
3784 | if (r_type >= (unsigned int) R_METAG_MAX) | |
3785 | { | |
3786 | bfd_set_error (bfd_error_bad_value); | |
3787 | error_ret_free_internal: | |
3788 | if (elf_section_data (section)->relocs == NULL) | |
3789 | free (internal_relocs); | |
3790 | goto error_ret_free_local; | |
3791 | } | |
3792 | ||
3793 | /* Only look for stubs on CALLR and B instructions. */ | |
3794 | if (!(r_type == (unsigned int) R_METAG_RELBRANCH || | |
3795 | r_type == (unsigned int) R_METAG_RELBRANCH_PLT)) | |
3796 | continue; | |
3797 | ||
3798 | /* Now determine the call target, its name, value, | |
3799 | section. */ | |
3800 | sym_sec = NULL; | |
3801 | sym_value = 0; | |
3802 | destination = 0; | |
3803 | hh = NULL; | |
3804 | if (r_indx < symtab_hdr->sh_info) | |
3805 | { | |
3806 | /* It's a local symbol. */ | |
3807 | Elf_Internal_Sym *sym; | |
3808 | Elf_Internal_Shdr *hdr; | |
3809 | unsigned int shndx; | |
3810 | ||
3811 | sym = local_syms + r_indx; | |
3812 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
3813 | sym_value = sym->st_value; | |
3814 | shndx = sym->st_shndx; | |
3815 | if (shndx < elf_numsections (input_bfd)) | |
3816 | { | |
3817 | hdr = elf_elfsections (input_bfd)[shndx]; | |
3818 | sym_sec = hdr->bfd_section; | |
3819 | destination = (sym_value + irela->r_addend | |
3820 | + sym_sec->output_offset | |
3821 | + sym_sec->output_section->vma); | |
3822 | } | |
3823 | } | |
3824 | else | |
3825 | { | |
3826 | /* It's an external symbol. */ | |
3827 | int e_indx; | |
3828 | ||
3829 | e_indx = r_indx - symtab_hdr->sh_info; | |
3830 | hh = ((struct elf_metag_link_hash_entry *) | |
3831 | elf_sym_hashes (input_bfd)[e_indx]); | |
3832 | ||
3833 | while (hh->eh.root.type == bfd_link_hash_indirect | |
3834 | || hh->eh.root.type == bfd_link_hash_warning) | |
3835 | hh = ((struct elf_metag_link_hash_entry *) | |
3836 | hh->eh.root.u.i.link); | |
3837 | ||
3838 | if (hh->eh.root.type == bfd_link_hash_defined | |
3839 | || hh->eh.root.type == bfd_link_hash_defweak) | |
3840 | { | |
3841 | sym_sec = hh->eh.root.u.def.section; | |
3842 | sym_value = hh->eh.root.u.def.value; | |
3843 | if (hh->eh.plt.offset != (bfd_vma) -1 | |
3844 | && hh->eh.dynindx != -1 | |
3845 | && r_type == (unsigned int) R_METAG_RELBRANCH_PLT) | |
3846 | { | |
ce558b89 | 3847 | sym_sec = htab->etab.splt; |
a3c62988 NC |
3848 | sym_value = hh->eh.plt.offset; |
3849 | } | |
3850 | ||
3851 | if (sym_sec->output_section != NULL) | |
3852 | destination = (sym_value + irela->r_addend | |
3853 | + sym_sec->output_offset | |
3854 | + sym_sec->output_section->vma); | |
3855 | else | |
3856 | continue; | |
3857 | } | |
3858 | else if (hh->eh.root.type == bfd_link_hash_undefweak) | |
3859 | { | |
0e1862bb | 3860 | if (! bfd_link_pic (info)) |
a3c62988 NC |
3861 | continue; |
3862 | } | |
3863 | else if (hh->eh.root.type == bfd_link_hash_undefined) | |
3864 | { | |
3865 | if (! (info->unresolved_syms_in_objects == RM_IGNORE | |
3866 | && (ELF_ST_VISIBILITY (hh->eh.other) | |
3867 | == STV_DEFAULT))) | |
3868 | continue; | |
3869 | } | |
3870 | else | |
3871 | { | |
3872 | bfd_set_error (bfd_error_bad_value); | |
3873 | goto error_ret_free_internal; | |
3874 | } | |
3875 | } | |
3876 | ||
3877 | /* Determine what (if any) linker stub is needed. */ | |
3878 | stub_type = metag_type_of_stub (section, irela, hh, | |
3879 | destination, info); | |
3880 | if (stub_type == metag_stub_none) | |
3881 | continue; | |
3882 | ||
3883 | /* Support for grouping stub sections. */ | |
3884 | id_sec = htab->stub_group[section->id].link_sec; | |
3885 | ||
3886 | /* Get the name of this stub. */ | |
3887 | stub_name = metag_stub_name (id_sec, sym_sec, hh, irela); | |
3888 | if (!stub_name) | |
3889 | goto error_ret_free_internal; | |
3890 | ||
3891 | hsh = metag_stub_hash_lookup (&htab->bstab, | |
3892 | stub_name, | |
3893 | FALSE, FALSE); | |
3894 | if (hsh != NULL) | |
3895 | { | |
3896 | /* The proper stub has already been created. */ | |
3897 | free (stub_name); | |
3898 | continue; | |
3899 | } | |
3900 | ||
3901 | hsh = metag_add_stub (stub_name, section, htab); | |
3902 | if (hsh == NULL) | |
3903 | { | |
3904 | free (stub_name); | |
3905 | goto error_ret_free_internal; | |
3906 | } | |
3907 | hsh->target_value = sym_value; | |
3908 | hsh->target_section = sym_sec; | |
3909 | hsh->stub_type = stub_type; | |
3910 | hsh->hh = hh; | |
3911 | hsh->addend = irela->r_addend; | |
3912 | stub_changed = TRUE; | |
3913 | } | |
3914 | ||
3915 | /* We're done with the internal relocs, free them. */ | |
3916 | if (elf_section_data (section)->relocs == NULL) | |
3917 | free (internal_relocs); | |
3918 | } | |
3919 | } | |
3920 | ||
3921 | if (!stub_changed) | |
3922 | break; | |
3923 | ||
3924 | /* OK, we've added some stubs. Find out the new size of the | |
3925 | stub sections. */ | |
3926 | for (stub_sec = htab->stub_bfd->sections; | |
3927 | stub_sec != NULL; | |
3928 | stub_sec = stub_sec->next) | |
3929 | stub_sec->size = 0; | |
3930 | ||
3931 | bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab); | |
3932 | ||
3933 | /* Ask the linker to do its stuff. */ | |
3934 | (*htab->layout_sections_again) (); | |
3935 | stub_changed = FALSE; | |
3936 | } | |
3937 | ||
3938 | free (htab->all_local_syms); | |
3939 | return TRUE; | |
3940 | ||
3941 | error_ret_free_local: | |
3942 | free (htab->all_local_syms); | |
3943 | return FALSE; | |
3944 | } | |
3945 | ||
3946 | /* Build all the stubs associated with the current output file. The | |
3947 | stubs are kept in a hash table attached to the main linker hash | |
3948 | table. This function is called via metagelf_finish in the linker. */ | |
3949 | ||
3950 | bfd_boolean | |
3951 | elf_metag_build_stubs (struct bfd_link_info *info) | |
3952 | { | |
3953 | asection *stub_sec; | |
3954 | struct bfd_hash_table *table; | |
3955 | struct elf_metag_link_hash_table *htab; | |
3956 | ||
3957 | htab = metag_link_hash_table (info); | |
3958 | ||
3959 | for (stub_sec = htab->stub_bfd->sections; | |
3960 | stub_sec != NULL; | |
3961 | stub_sec = stub_sec->next) | |
3962 | { | |
3963 | bfd_size_type size; | |
3964 | ||
3965 | /* Allocate memory to hold the linker stubs. */ | |
3966 | size = stub_sec->size; | |
3967 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); | |
3968 | if (stub_sec->contents == NULL && size != 0) | |
3969 | return FALSE; | |
3970 | stub_sec->size = 0; | |
3971 | } | |
3972 | ||
3973 | /* Build the stubs as directed by the stub hash table. */ | |
3974 | table = &htab->bstab; | |
3975 | bfd_hash_traverse (table, metag_build_one_stub, info); | |
3976 | ||
3977 | return TRUE; | |
3978 | } | |
3979 | ||
3980 | /* Return TRUE if SYM represents a local label symbol. */ | |
3981 | ||
3982 | static bfd_boolean | |
3983 | elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name) | |
3984 | { | |
3985 | if (name[0] == '$' && name[1] == 'L') | |
3986 | return 1; | |
3987 | return _bfd_elf_is_local_label_name (abfd, name); | |
3988 | } | |
3989 | ||
3990 | /* Return address for Ith PLT stub in section PLT, for relocation REL | |
3991 | or (bfd_vma) -1 if it should not be included. */ | |
3992 | ||
3993 | static bfd_vma | |
3994 | elf_metag_plt_sym_val (bfd_vma i, const asection *plt, | |
3995 | const arelent *rel ATTRIBUTE_UNUSED) | |
3996 | { | |
3997 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; | |
3998 | } | |
3999 | ||
4000 | #define ELF_ARCH bfd_arch_metag | |
4001 | #define ELF_TARGET_ID METAG_ELF_DATA | |
4002 | #define ELF_MACHINE_CODE EM_METAG | |
4003 | #define ELF_MINPAGESIZE 0x1000 | |
4004 | #define ELF_MAXPAGESIZE 0x4000 | |
4005 | #define ELF_COMMONPAGESIZE 0x1000 | |
4006 | ||
6d00b590 | 4007 | #define TARGET_LITTLE_SYM metag_elf32_vec |
a3c62988 NC |
4008 | #define TARGET_LITTLE_NAME "elf32-metag" |
4009 | ||
4010 | #define elf_symbol_leading_char '_' | |
4011 | ||
4012 | #define elf_info_to_howto_rel NULL | |
4013 | #define elf_info_to_howto metag_info_to_howto_rela | |
4014 | ||
4015 | #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name | |
4016 | #define bfd_elf32_bfd_link_hash_table_create \ | |
4017 | elf_metag_link_hash_table_create | |
a3c62988 NC |
4018 | #define elf_backend_relocate_section elf_metag_relocate_section |
4019 | #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook | |
a3c62988 NC |
4020 | #define elf_backend_check_relocs elf_metag_check_relocs |
4021 | #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections | |
4022 | #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol | |
4023 | #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol | |
4024 | #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections | |
4025 | #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections | |
4026 | #define elf_backend_omit_section_dynsym \ | |
d00dd7dc | 4027 | _bfd_elf_omit_section_dynsym_all |
ed7e9d0b | 4028 | #define elf_backend_init_file_header elf_metag_init_file_header |
a3c62988 NC |
4029 | #define elf_backend_reloc_type_class elf_metag_reloc_type_class |
4030 | #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol | |
4031 | #define elf_backend_plt_sym_val elf_metag_plt_sym_val | |
4032 | ||
4033 | #define elf_backend_can_gc_sections 1 | |
4034 | #define elf_backend_can_refcount 1 | |
ce558b89 AM |
4035 | #define elf_backend_rela_normal 1 |
4036 | #define elf_backend_want_got_plt 1 | |
a3c62988 NC |
4037 | #define elf_backend_want_got_sym 0 |
4038 | #define elf_backend_want_plt_sym 0 | |
4039 | #define elf_backend_plt_readonly 1 | |
64f52338 | 4040 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 4041 | #define elf_backend_want_dynrelro 1 |
a3c62988 NC |
4042 | |
4043 | #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup | |
4044 | #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup | |
4045 | ||
4046 | #include "elf32-target.h" |