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b8891f8d AJ |
1 | /* 32-bit ELF support for C-SKY. |
2 | Copyright (C) 1998-2018 Free Software Foundation, Inc. | |
3 | Contributed by C-SKY Microsystems and Mentor Graphics. | |
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 "bfdlink.h" | |
25 | #include "libbfd.h" | |
26 | #include "elf-bfd.h" | |
27 | #include "elf/csky.h" | |
28 | #include "opcode/csky.h" | |
29 | #include <assert.h> | |
30 | #include "libiberty.h" | |
31 | ||
32 | /* Data structures used for merging different arch variants. | |
33 | V1 (510/610) and V2 (8xx) processors are incompatible, but | |
34 | we can merge wthin each family. */ | |
35 | ||
36 | enum merge_class | |
37 | { | |
38 | CSKY_V1, | |
39 | CSKY_V2 | |
40 | }; | |
41 | ||
42 | typedef struct csky_arch_for_merge | |
43 | { | |
44 | const char *name; | |
45 | const unsigned long arch_eflag; | |
46 | /* The files can merge only if they are in same class. */ | |
47 | enum merge_class class; | |
48 | /* When input files have different levels, | |
49 | the target sets arch_eflag to the largest level file's arch_eflag. */ | |
50 | unsigned int class_level; | |
51 | /* Control whether to print warning when merging with different arch. */ | |
52 | unsigned int do_warning; | |
53 | } csky_arch_for_merge; | |
54 | ||
55 | static struct csky_arch_for_merge csky_archs[] = | |
56 | { | |
57 | /* 510 and 610 merge to 610 without warning. */ | |
58 | { "510", CSKY_ARCH_510, CSKY_V1, 0, 0}, | |
59 | { "610", CSKY_ARCH_610, CSKY_V1, 1, 0}, | |
60 | /* 801, 802, 803, 807, 810 merge to largest one. */ | |
61 | { "801", CSKY_ARCH_801, CSKY_V2, 0, 1}, | |
62 | { "802", CSKY_ARCH_802, CSKY_V2, 1, 1}, | |
63 | { "803", CSKY_ARCH_803, CSKY_V2, 2, 1}, | |
64 | { "807", CSKY_ARCH_807, CSKY_V2, 3, 1}, | |
65 | { "810", CSKY_ARCH_810, CSKY_V2, 4, 1}, | |
66 | { NULL, 0, 0, 0, 0} | |
67 | }; | |
68 | ||
69 | /* Return the ARCH bits out of ABFD. */ | |
70 | #define bfd_csky_arch(abfd) \ | |
71 | (elf_elfheader (abfd)->e_flags & CSKY_ARCH_MASK) | |
72 | ||
73 | /* Return the ABI bits out of ABFD. */ | |
74 | #define bfd_csky_abi(abfd) \ | |
75 | (elf_elfheader (abfd)->e_flags & CSKY_ABI_MASK) | |
76 | ||
77 | ||
78 | /* The index of a howto-item is implicitly equal to | |
79 | the corresponding Relocation Type Encoding. */ | |
80 | static reloc_howto_type csky_elf_howto_table[] = | |
81 | { | |
82 | /* 0 */ | |
83 | HOWTO (R_CKCORE_NONE, /* type */ | |
84 | 0, /* rightshift */ | |
85 | 0, /* size */ | |
86 | 0, /* bitsize */ | |
87 | FALSE, /* pc_relative */ | |
88 | 0, /* bitpos */ | |
89 | complain_overflow_dont, /* complain_on_overflow */ | |
90 | NULL, /* special_function */ | |
91 | "R_CKCORE_NONE", /* name */ | |
92 | FALSE, /* partial_inplace */ | |
93 | 0, /* src_mask */ | |
94 | 0, /* dst_mask */ | |
95 | FALSE), /* pcrel_offset */ | |
96 | ||
97 | /* 1. */ | |
98 | HOWTO (R_CKCORE_ADDR32, /* type */ | |
99 | 0, /* rightshift */ | |
100 | 2, /* size */ | |
101 | 32, /* bitsize */ | |
102 | FALSE, /* pc_relative */ | |
103 | 0, /* bitpos */ | |
104 | complain_overflow_dont, /* complain_on_overflow */ | |
105 | bfd_elf_generic_reloc, /* special_function */ | |
106 | "R_CKCORE_ADDR32", /* name */ | |
107 | FALSE, /* partial_inplace */ | |
108 | 0, /* src_mask */ | |
109 | 0xffffffff, /* dst_mask */ | |
110 | FALSE), /* pcrel_offset */ | |
111 | ||
112 | /* 2: Only for csky v1. */ | |
113 | HOWTO (R_CKCORE_PCREL_IMM8BY4, /* type */ | |
114 | 2, /* rightshift */ | |
115 | 1, /* size */ | |
116 | 8, /* bitsize */ | |
117 | TRUE, /* pc_relative */ | |
118 | 0, /* bitpos */ | |
119 | complain_overflow_bitfield, /* complain_on_overflow */ | |
120 | NULL, /* special_function */ | |
121 | "R_CKCORE_PCREL_IMM8BY4", /* name */ | |
122 | FALSE, /* partial_inplace */ | |
123 | 0xff, /* src_mask */ | |
124 | 0xff, /* dst_mask */ | |
125 | TRUE), /* pcrel_offset */ | |
126 | ||
127 | /* 3: Only for csky v1. */ | |
128 | HOWTO (R_CKCORE_PCREL_IMM11BY2, /* type */ | |
129 | 1, /* rightshift */ | |
130 | 1, /* size */ | |
131 | 11, /* bitsize */ | |
132 | TRUE, /* pc_relative */ | |
133 | 0, /* bitpos */ | |
134 | complain_overflow_signed, /* complain_on_overflow */ | |
135 | bfd_elf_generic_reloc, /* special_function */ | |
136 | "R_CKCORE_PCREL_IMM11BY2", /* name */ | |
137 | FALSE, /* partial_inplace */ | |
138 | 0x7ff, /* src_mask */ | |
139 | 0x7ff, /* dst_mask */ | |
140 | TRUE), /* pcrel_offset */ | |
141 | ||
142 | /* 4: DELETED. */ | |
143 | HOWTO (R_CKCORE_PCREL_IMM4BY2,0,0,0,0,0,0,0,"R_CKCORE_PCREL_IMM4BY2",0,0,0,0), | |
144 | ||
145 | /* 5. */ | |
146 | HOWTO (R_CKCORE_PCREL32, /* type */ | |
147 | 0, /* rightshift */ | |
148 | 2, /* size */ | |
149 | 32, /* bitsize */ | |
150 | TRUE, /* pc_relative */ | |
151 | 0, /* bitpos */ | |
152 | complain_overflow_dont, /* complain_on_overflow */ | |
153 | NULL, /* special_function */ | |
154 | "R_CKCORE_PCREL32", /* name */ | |
155 | FALSE, /* partial_inplace */ | |
156 | 0x0, /* src_mask */ | |
157 | 0xffffffff, /* dst_mask */ | |
158 | TRUE), /* pcrel_offset */ | |
159 | ||
160 | /* 6: Only for csky v1. */ | |
161 | HOWTO (R_CKCORE_PCREL_JSR_IMM11BY2, /* type */ | |
162 | 1, /* rightshift */ | |
163 | 1, /* size */ | |
164 | 11, /* bitsize */ | |
165 | TRUE, /* pc_relative */ | |
166 | 0, /* bitpos */ | |
167 | complain_overflow_signed, /* complain_on_overflow */ | |
168 | bfd_elf_generic_reloc, /* special_function */ | |
169 | "R_CKCORE_PCREL_JSR_IMM11BY2", /* name */ | |
170 | FALSE, /* partial_inplace */ | |
171 | 0x7ff, /* src_mask */ | |
172 | 0x7ff, /* dst_mask */ | |
173 | TRUE), /* pcrel_offset */ | |
174 | ||
175 | /* 7: GNU extension to record C++ vtable member usage. */ | |
176 | HOWTO (R_CKCORE_GNU_VTENTRY, /* type */ | |
177 | 0, /* rightshift */ | |
178 | 2, /* size */ | |
179 | 0, /* bitsize */ | |
180 | FALSE, /* pc_relative */ | |
181 | 0, /* bitpos */ | |
182 | complain_overflow_dont, /* complain_on_overflow */ | |
183 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
184 | "R_CKCORE_GNU_VTENTRY", /* name */ | |
185 | FALSE, /* partial_inplace */ | |
186 | 0x0, /* src_mask */ | |
187 | 0x0, /* dst_mask */ | |
188 | FALSE), /* pcrel_offset */ | |
189 | ||
190 | /* 8: GNU extension to record C++ vtable hierarchy. */ | |
191 | HOWTO (R_CKCORE_GNU_VTINHERIT, /* type */ | |
192 | 0, /* rightshift */ | |
193 | 2, /* size */ | |
194 | 0, /* bitsize */ | |
195 | FALSE, /* pc_relative */ | |
196 | 0, /* bitpos */ | |
197 | complain_overflow_dont, /* complain_on_overflow */ | |
198 | NULL, /* special_function */ | |
199 | "R_CKCORE_GNU_VTINHERIT", /* name */ | |
200 | FALSE, /* partial_inplace */ | |
201 | 0x0, /* src_mask */ | |
202 | 0x0, /* dst_mask */ | |
203 | FALSE), /* pcrel_offset */ | |
204 | ||
205 | /* 9. */ | |
206 | HOWTO (R_CKCORE_RELATIVE, /* type */ | |
207 | 0, /* rightshift */ | |
208 | 2, /* size */ | |
209 | 32, /* bitsize */ | |
210 | FALSE, /* pc_relative */ | |
211 | 0, /* bitpos */ | |
212 | complain_overflow_signed, /* complain_on_overflow */ | |
213 | bfd_elf_generic_reloc, /* special_function */ | |
214 | "R_CKCORE_RELATIVE", /* name */ | |
215 | TRUE, /* partial_inplace */ | |
216 | 0x0, /* src_mask */ | |
217 | 0xffffffff, /* dst_mask */ | |
218 | FALSE), /* pcrel_offset */ | |
219 | ||
220 | /* 10: None. */ | |
221 | /* FIXME: It is a bug that copy relocations are not implemented. */ | |
222 | HOWTO (R_CKCORE_COPY, /* type */ | |
223 | 0, /* rightshift */ | |
224 | 2, /* size */ | |
225 | 32, /* bitsize */ | |
226 | FALSE, /* pc_relative */ | |
227 | 0, /* bitpos */ | |
228 | complain_overflow_bitfield, /* complain_on_overflow */ | |
229 | bfd_elf_generic_reloc, /* special_function */ | |
230 | "R_CKCORE_COPY", /* name */ | |
231 | TRUE, /* partial_inplace */ | |
232 | 0xffffffff, /* src_mask */ | |
233 | 0xffffffff, /* dst_mask */ | |
234 | FALSE), /* pcrel_offset */ | |
235 | ||
236 | /* 11: None. */ | |
237 | HOWTO (R_CKCORE_GLOB_DAT,0,0,0,0,0,0,0,"R_CKCORE_GLOB_DAT",0,0,0,0), | |
238 | ||
239 | /* 12: None. */ | |
240 | HOWTO (R_CKCORE_JUMP_SLOT,0,0,0,0,0,0,0,"R_CKCORE_JUMP_SLOT",0,0,0,0), | |
241 | ||
242 | /* 13. */ | |
243 | HOWTO (R_CKCORE_GOTOFF, /* type */ | |
244 | 0, /* rightshift */ | |
245 | 2, /* size */ | |
246 | 32, /* bitsize */ | |
247 | FALSE, /* pc_relative */ | |
248 | 0, /* bitpos */ | |
249 | complain_overflow_dont, /* complain_on_overflow */ | |
250 | bfd_elf_generic_reloc, /* special_function */ | |
251 | "R_CKCORE_GOTOFF", /* name */ | |
252 | TRUE, /* partial_inplace */ | |
253 | 0x0, /* src_mask */ | |
254 | 0xffffffffl, /* dst_mask */ | |
255 | FALSE), /* pcrel_offset */ | |
256 | ||
257 | /* 14. */ | |
258 | HOWTO (R_CKCORE_GOTPC, /* type */ | |
259 | 0, /* rightshift */ | |
260 | 2, /* size */ | |
261 | 32, /* bitsize */ | |
262 | TRUE, /* pc_relative */ | |
263 | 0, /* bitpos */ | |
264 | complain_overflow_dont, /* complain_on_overflow */ | |
265 | bfd_elf_generic_reloc, /* special_function */ | |
266 | "R_CKCORE_GOTPC", /* name */ | |
267 | TRUE, /* partial_inplace */ | |
268 | 0x0, /* src_mask */ | |
269 | 0xffffffff, /* dst_mask */ | |
270 | FALSE), /* pcrel_offset */ | |
271 | ||
272 | /* 15. */ | |
273 | HOWTO (R_CKCORE_GOT32, /* type */ | |
274 | 0, /* rightshift */ | |
275 | 2, /* size */ | |
276 | 32, /* bitsize */ | |
277 | FALSE, /* pc_relative */ | |
278 | 0, /* bitpos */ | |
279 | complain_overflow_dont, /* complain_on_overflow */ | |
280 | bfd_elf_generic_reloc, /* special_function */ | |
281 | "R_CKCORE_GOT32", /* name */ | |
282 | TRUE, /* partial_inplace */ | |
283 | 0x0, /* src_mask */ | |
284 | 0xffffffff, /* dst_mask */ | |
285 | TRUE), /* pcrel_offset */ | |
286 | ||
287 | /* 16. */ | |
288 | HOWTO (R_CKCORE_PLT32, /* type */ | |
289 | 0, /* rightshift */ | |
290 | 2, /* size */ | |
291 | 32, /* bitsize */ | |
292 | FALSE, /* pc_relative */ | |
293 | 0, /* bitpos */ | |
294 | complain_overflow_dont, /* complain_on_overflow */ | |
295 | bfd_elf_generic_reloc, /* special_function */ | |
296 | "R_CKCORE_PLT32", /* name */ | |
297 | TRUE, /* partial_inplace */ | |
298 | 0x0, /* src_mask */ | |
299 | 0xffffffff, /* dst_mask */ | |
300 | TRUE), /* pcrel_offset */ | |
301 | ||
302 | /* 17: None. */ | |
303 | HOWTO (R_CKCORE_ADDRGOT,0,0,0,0,0,0,0,"R_CKCORE_ADDRGOT",0,0,0,0), | |
304 | ||
305 | /* 18: None. */ | |
306 | HOWTO (R_CKCORE_ADDRPLT,0,0,0,0,0,0,0,"R_CKCORE_ADDRPLT",0,0,0,0), | |
307 | ||
308 | /* 19: Only for csky v2. */ | |
309 | HOWTO (R_CKCORE_PCREL_IMM26BY2, /* type */ | |
310 | 1, /* rightshift */ | |
311 | 2, /* size */ | |
312 | 26, /* bitsize */ | |
313 | TRUE, /* pc_relative */ | |
314 | 0, /* bitpos */ | |
315 | complain_overflow_signed, /* complain_on_overflow */ | |
316 | bfd_elf_generic_reloc, /* special_function */ | |
317 | "R_CKCORE_PCREL_IMM26BY2", /* name */ | |
318 | FALSE, /* partial_inplace */ | |
319 | 0x0, /* src_mask */ | |
320 | 0x3ffffff, /* dst_mask */ | |
321 | TRUE), /* pcrel_offset */ | |
322 | ||
323 | /* 20: Only for csky v2. */ | |
324 | HOWTO (R_CKCORE_PCREL_IMM16BY2, /* type */ | |
325 | 1, /* rightshift */ | |
326 | 2, /* size */ | |
327 | 16, /* bitsize */ | |
328 | TRUE, /* pc_relative */ | |
329 | 0, /* bitpos */ | |
330 | complain_overflow_signed, /* complain_on_overflow */ | |
331 | NULL, /* special_function */ | |
332 | "R_CKCORE_PCREL_IMM16BY2", /* name */ | |
333 | FALSE, /* partial_inplace */ | |
334 | 0x0, /* src_mask */ | |
335 | 0xffff, /* dst_mask */ | |
336 | TRUE), /* pcrel_offset */ | |
337 | ||
338 | /* 21: Only for csky v2. */ | |
339 | HOWTO (R_CKCORE_PCREL_IMM16BY4, /* type */ | |
340 | 2, /* rightshift */ | |
341 | 2, /* size */ | |
342 | 16, /* bitsize */ | |
343 | TRUE, /* pc_relative */ | |
344 | 0, /* bitpos */ | |
345 | complain_overflow_bitfield, /* complain_on_overflow */ | |
346 | NULL, /* special_function */ | |
347 | "R_CKCORE_PCREL_IMM16BY4", /* name */ | |
348 | FALSE, /* partial_inplace */ | |
349 | 0xffff0000, /* src_mask */ | |
350 | 0xffff, /* dst_mask */ | |
351 | TRUE), /* pcrel_offset */ | |
352 | ||
353 | /* 22: Only for csky v2. */ | |
354 | HOWTO (R_CKCORE_PCREL_IMM10BY2, /* type */ | |
355 | 1, /* rightshift */ | |
356 | 1, /* size */ | |
357 | 10, /* bitsize */ | |
358 | TRUE, /* pc_relative */ | |
359 | 0, /* bitpos */ | |
360 | complain_overflow_signed, /* complain_on_overflow */ | |
361 | bfd_elf_generic_reloc, /* special_function */ | |
362 | "R_CKCORE_PCREL_IMM10BY2", /* name */ | |
363 | FALSE, /* partial_inplace */ | |
364 | 0x0, /* src_mask */ | |
365 | 0x3ff, /* dst_mask */ | |
366 | TRUE), /* pcrel_offset */ | |
367 | ||
368 | /* 23: Only for csky v2. */ | |
369 | HOWTO (R_CKCORE_PCREL_IMM10BY4, /* type */ | |
370 | 2, /* rightshift */ | |
371 | 2, /* size */ | |
372 | 10, /* bitsize */ | |
373 | TRUE, /* pc_relative */ | |
374 | 0, /* bitpos */ | |
375 | complain_overflow_bitfield, /* complain_on_overflow */ | |
376 | NULL, /* special_function */ | |
377 | "R_CKCORE_PCREL_IMM10BY4", /* name */ | |
378 | FALSE, /* partial_inplace */ | |
379 | 0x0, /* src_mask */ | |
380 | 0x3ff, /* dst_mask */ | |
381 | TRUE), /* pcrel_offset */ | |
382 | ||
383 | /* 24: Only for csky v2. */ | |
384 | HOWTO (R_CKCORE_ADDR_HI16, /* type */ | |
385 | 16, /* rightshift */ | |
386 | 2, /* size */ | |
387 | 16, /* bitsize */ | |
388 | FALSE, /* pc_relative */ | |
389 | 0, /* bitpos */ | |
390 | complain_overflow_dont, /* complain_on_overflow */ | |
391 | bfd_elf_generic_reloc, /* special_function */ | |
392 | "R_CKCORE_ADDR_HI16", /* name */ | |
393 | FALSE, /* partial_inplace */ | |
394 | 0x0, /* src_mask */ | |
395 | 0xffff, /* dst_mask */ | |
396 | FALSE), /* pcrel_offset */ | |
397 | ||
398 | /* 25. */ | |
399 | HOWTO (R_CKCORE_ADDR_LO16, /* type */ | |
400 | 0, /* rightshift */ | |
401 | 2, /* size */ | |
402 | 16, /* bitsize */ | |
403 | FALSE, /* pc_relative */ | |
404 | 0, /* bitpos */ | |
405 | complain_overflow_dont, /* complain_on_overflow */ | |
406 | bfd_elf_generic_reloc, /* special_function */ | |
407 | "R_CKCORE_ADDR_LO16", /* name */ | |
408 | FALSE, /* partial_inplace */ | |
409 | 0x0, /* src_mask */ | |
410 | 0xffff, /* dst_mask */ | |
411 | FALSE), /* pcrel_offset */ | |
412 | ||
413 | /* 26. */ | |
414 | HOWTO (R_CKCORE_GOTPC_HI16, /* type */ | |
415 | 16, /* rightshift */ | |
416 | 2, /* size */ | |
417 | 16, /* bitsize */ | |
418 | TRUE, /* pc_relative */ | |
419 | 0, /* bitpos */ | |
420 | complain_overflow_dont, /* complain_on_overflow */ | |
421 | bfd_elf_generic_reloc, /* special_function */ | |
422 | "R_CKCORE_GOTPC_HI16", /* name */ | |
423 | FALSE, /* partial_inplace */ | |
424 | 0x0, /* src_mask */ | |
425 | 0xffff, /* dst_mask */ | |
426 | FALSE), /* pcrel_offset */ | |
427 | ||
428 | /* 27. */ | |
429 | HOWTO (R_CKCORE_GOTPC_LO16, /* type */ | |
430 | 0, /* rightshift */ | |
431 | 2, /* size */ | |
432 | 16, /* bitsize */ | |
433 | TRUE, /* pc_relative */ | |
434 | 0, /* bitpos */ | |
435 | complain_overflow_dont, /* complain_on_overflow */ | |
436 | bfd_elf_generic_reloc, /* special_function */ | |
437 | "R_CKCORE_GOTPC_LO16", /* name */ | |
438 | FALSE, /* partial_inplace */ | |
439 | 0x0, /* src_mask */ | |
440 | 0xffff, /* dst_mask */ | |
441 | FALSE), /* pcrel_offset */ | |
442 | ||
443 | /* 28. */ | |
444 | HOWTO (R_CKCORE_GOTOFF_HI16, /* type */ | |
445 | 16, /* rightshift */ | |
446 | 2, /* size */ | |
447 | 16, /* bitsize */ | |
448 | FALSE, /* pc_relative */ | |
449 | 0, /* bitpos */ | |
450 | complain_overflow_dont, /* complain_on_overflow */ | |
451 | bfd_elf_generic_reloc, /* special_function */ | |
452 | "R_CKCORE_GOTOFF_HI16", /* name */ | |
453 | FALSE, /* partial_inplace */ | |
454 | 0x0, /* src_mask */ | |
455 | 0xffff, /* dst_mask */ | |
456 | FALSE), /* pcrel_offset */ | |
457 | ||
458 | /* 29. */ | |
459 | HOWTO (R_CKCORE_GOTOFF_LO16, /* type */ | |
460 | 0, /* rightshift */ | |
461 | 2, /* size */ | |
462 | 16, /* bitsize */ | |
463 | FALSE, /* pc_relative */ | |
464 | 0, /* bitpos */ | |
465 | complain_overflow_dont, /* complain_on_overflow */ | |
466 | bfd_elf_generic_reloc, /* special_function */ | |
467 | "R_CKCORE_GOTOFF_LO16", /* name */ | |
468 | FALSE, /* partial_inplace */ | |
469 | 0x0, /* src_mask */ | |
470 | 0xffff, /* dst_mask */ | |
471 | FALSE), /* pcrel_offset */ | |
472 | ||
473 | /* 30. */ | |
474 | HOWTO (R_CKCORE_GOT12, /* type */ | |
475 | 2, /* rightshift */ | |
476 | 2, /* size */ | |
477 | 12, /* bitsize */ | |
478 | FALSE, /* pc_relative */ | |
479 | 0, /* bitpos */ | |
480 | complain_overflow_bitfield, /* complain_on_overflow */ | |
481 | bfd_elf_generic_reloc, /* special_function */ | |
482 | "R_CKCORE_GOT12", /* name */ | |
483 | TRUE, /* partial_inplace */ | |
484 | 0x0, /* src_mask */ | |
485 | 0xfff, /* dst_mask */ | |
486 | FALSE), /* pcrel_offset */ | |
487 | ||
488 | /* 31. */ | |
489 | HOWTO (R_CKCORE_GOT_HI16, /* type */ | |
490 | 16, /* rightshift */ | |
491 | 2, /* size */ | |
492 | 16, /* bitsize */ | |
493 | FALSE, /* pc_relative */ | |
494 | 0, /* bitpos */ | |
495 | complain_overflow_dont, /* complain_on_overflow */ | |
496 | bfd_elf_generic_reloc, /* special_function */ | |
497 | "R_CKCORE_GOT_HI16", /* name */ | |
498 | TRUE, /* partial_inplace */ | |
499 | 0x0, /* src_mask */ | |
500 | 0xffff, /* dst_mask */ | |
501 | FALSE), /* pcrel_offset */ | |
502 | ||
503 | /* 32. */ | |
504 | HOWTO (R_CKCORE_GOT_LO16, /* type */ | |
505 | 0, /* rightshift */ | |
506 | 2, /* size */ | |
507 | 16, /* bitsize */ | |
508 | FALSE, /* pc_relative */ | |
509 | 0, /* bitpos */ | |
510 | complain_overflow_dont, /* complain_on_overflow */ | |
511 | bfd_elf_generic_reloc, /* special_function */ | |
512 | "R_CKCORE_GOT_LO16", /* name */ | |
513 | TRUE, /* partial_inplace */ | |
514 | 0x0, /* src_mask */ | |
515 | 0xffff, /* dst_mask */ | |
516 | FALSE), /* pcrel_offset */ | |
517 | ||
518 | /* 33. */ | |
519 | HOWTO (R_CKCORE_PLT12, /* type */ | |
520 | 2, /* rightshift */ | |
521 | 2, /* size */ | |
522 | 12, /* bitsize */ | |
523 | FALSE, /* pc_relative */ | |
524 | 0, /* bitpos */ | |
525 | complain_overflow_bitfield, /* complain_on_overflow */ | |
526 | bfd_elf_generic_reloc, /* special_function */ | |
527 | "R_CKCORE_PLT12", /* name */ | |
528 | TRUE, /* partial_inplace */ | |
529 | 0x0, /* src_mask */ | |
530 | 0xfff, /* dst_mask */ | |
531 | FALSE), /* pcrel_offset */ | |
532 | ||
533 | /* 34. */ | |
534 | HOWTO (R_CKCORE_PLT_HI16, /* type */ | |
535 | 16, /* rightshift */ | |
536 | 2, /* size */ | |
537 | 16, /* bitsize */ | |
538 | FALSE, /* pc_relative */ | |
539 | 0, /* bitpos */ | |
540 | complain_overflow_dont, /* complain_on_overflow */ | |
541 | bfd_elf_generic_reloc, /* special_function */ | |
542 | "R_CKCORE_PLT_HI16", /* name */ | |
543 | TRUE, /* partial_inplace */ | |
544 | 0x0, /* src_mask */ | |
545 | 0xffff, /* dst_mask */ | |
546 | FALSE), /* pcrel_offset */ | |
547 | ||
548 | /* 35. */ | |
549 | HOWTO (R_CKCORE_PLT_LO16, /* type */ | |
550 | 0, /* rightshift */ | |
551 | 2, /* size */ | |
552 | 16, /* bitsize */ | |
553 | FALSE, /* pc_relative */ | |
554 | 0, /* bitpos */ | |
555 | complain_overflow_dont, /* complain_on_overflow */ | |
556 | bfd_elf_generic_reloc, /* special_function */ | |
557 | "R_CKCORE_PLT_LO16", /* name */ | |
558 | TRUE, /* partial_inplace */ | |
559 | 0x0, /* src_mask */ | |
560 | 0xffff, /* dst_mask */ | |
561 | FALSE), /* pcrel_offset */ | |
562 | ||
563 | /* 36: None. */ | |
564 | HOWTO (R_CKCORE_ADDRGOT_HI16,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0), | |
565 | ||
566 | /* 37: None. */ | |
567 | HOWTO (R_CKCORE_ADDRGOT_LO16,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0), | |
568 | ||
569 | /* 38: None. */ | |
570 | HOWTO (R_CKCORE_ADDRPLT_HI16,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0), | |
571 | ||
572 | /* 39: None. */ | |
573 | HOWTO (R_CKCORE_ADDRPLT_LO16,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0), | |
574 | ||
575 | /* 40. */ | |
576 | HOWTO (R_CKCORE_PCREL_JSR_IMM26BY2, /* type */ | |
577 | 1, /* rightshift */ | |
578 | 2, /* size */ | |
579 | 26, /* bitsize */ | |
580 | TRUE, /* pc_relative */ | |
581 | 0, /* bitpos */ | |
582 | complain_overflow_signed, /* complain_on_overflow */ | |
583 | bfd_elf_generic_reloc, /* special_function */ | |
584 | "R_CKCORE_PCREL_JSR_IMM26BY2", /* name */ | |
585 | FALSE, /* partial_inplace */ | |
586 | 0x0, /* src_mask */ | |
587 | 0x3ffffff, /* dst_mask */ | |
588 | TRUE), /* pcrel_offset */ | |
589 | ||
590 | /* 41. */ | |
591 | HOWTO (R_CKCORE_TOFFSET_LO16, /* type */ | |
592 | 0, /* rightshift */ | |
593 | 2, /* size */ | |
594 | 16, /* bitsize */ | |
595 | FALSE, /* pc_relative */ | |
596 | 0, /* bitpos */ | |
597 | complain_overflow_unsigned, /* complain_on_overflow */ | |
598 | NULL, /* special_function */ | |
599 | "R_CKCORE_TOFFSET_LO16", /* name */ | |
600 | FALSE, /* partial_inplace */ | |
601 | 0x0, /* src_mask */ | |
602 | 0xffff, /* dst_mask */ | |
603 | FALSE), /* pcrel_offset */ | |
604 | ||
605 | /* 42. */ | |
606 | HOWTO (R_CKCORE_DOFFSET_LO16, /* type */ | |
607 | 0, /* rightshift */ | |
608 | 2, /* size */ | |
609 | 16, /* bitsize */ | |
610 | FALSE, /* pc_relative */ | |
611 | 0, /* bitpos */ | |
612 | complain_overflow_unsigned, /* complain_on_overflow */ | |
613 | NULL, /* special_function */ | |
614 | "R_CKCORE_DOFFSET_LO16", /* name */ | |
615 | FALSE, /* partial_inplace */ | |
616 | 0x0, /* src_mask */ | |
617 | 0xffff, /* dst_mask */ | |
618 | FALSE), /* pcrel_offset */ | |
619 | ||
620 | /* 43. */ | |
621 | HOWTO (R_CKCORE_PCREL_IMM18BY2, /* type */ | |
622 | 1, /* rightshift */ | |
623 | 2, /* size */ | |
624 | 18, /* bitsize */ | |
625 | TRUE, /* pc_relative */ | |
626 | 0, /* bitpos */ | |
627 | complain_overflow_signed, /* complain_on_overflow */ | |
628 | NULL, /* special_function */ | |
629 | "R_CKCORE_PCREL_IMM18BY2", /* name */ | |
630 | FALSE, /* partial_inplace */ | |
631 | 0x0, /* src_mask */ | |
632 | 0x3ffff, /* dst_mask */ | |
633 | TRUE), /* pcrel_offset */ | |
634 | ||
635 | /* 44. */ | |
636 | HOWTO (R_CKCORE_DOFFSET_IMM18, /* type */ | |
637 | 0, /* rightshift */ | |
638 | 2, /* size */ | |
639 | 18, /* bitsize */ | |
640 | FALSE, /* pc_relative */ | |
641 | 0, /* bitpos */ | |
642 | complain_overflow_unsigned, /* complain_on_overflow */ | |
643 | NULL, /* special_function */ | |
644 | "R_CKCORE_DOFFSET_IMM18", /* name */ | |
645 | FALSE, /* partial_inplace */ | |
646 | 0x0, /* src_mask */ | |
647 | 0x3ffff, /* dst_mask */ | |
648 | FALSE), /* pcrel_offset */ | |
649 | ||
650 | /* 45. */ | |
651 | HOWTO (R_CKCORE_DOFFSET_IMM18BY2, /* type */ | |
652 | 1, /* rightshift */ | |
653 | 2, /* size */ | |
654 | 18, /* bitsize */ | |
655 | FALSE, /* pc_relative */ | |
656 | 0, /* bitpos */ | |
657 | complain_overflow_unsigned, /* complain_on_overflow */ | |
658 | NULL, /* special_function */ | |
659 | "R_CKCORE_DOFFSET_IMM18BY2", /* name */ | |
660 | FALSE, /* partial_inplace */ | |
661 | 0x0, /* src_mask */ | |
662 | 0x3ffff, /* dst_mask */ | |
663 | FALSE), /* pcrel_offset */ | |
664 | ||
665 | /* 46. */ | |
666 | HOWTO (R_CKCORE_DOFFSET_IMM18BY4, /* type */ | |
667 | 2, /* rightshift */ | |
668 | 2, /* size */ | |
669 | 18, /* bitsize */ | |
670 | FALSE, /* pc_relative */ | |
671 | 0, /* bitpos */ | |
672 | complain_overflow_unsigned, /* complain_on_overflow */ | |
673 | NULL, /* special_function */ | |
674 | "R_CKCORE_DOFFSET_IMM18BY4", /* name */ | |
675 | FALSE, /* partial_inplace */ | |
676 | 0x0, /* src_mask */ | |
677 | 0x3ffff, /* dst_mask */ | |
678 | FALSE), /* pcrel_offset */ | |
679 | ||
680 | /* 47. */ | |
681 | HOWTO (R_CKCORE_GOTOFF_IMM18, /* type */ | |
682 | 0, /* rightshift */ | |
683 | 2, /* size */ | |
684 | 18, /* bitsize */ | |
685 | FALSE, /* pc_relative */ | |
686 | 0, /* bitpos */ | |
687 | complain_overflow_bitfield, /* complain_on_overflow */ | |
688 | bfd_elf_generic_reloc, /* special_function */ | |
689 | "R_CKCORE_GOTOFF_IMM18", /* name */ | |
690 | TRUE, /* partial_inplace */ | |
691 | 0xfffc, /* src_mask */ | |
692 | 0x3ffff, /* dst_mask */ | |
693 | FALSE), /* pcrel_offset */ | |
694 | ||
695 | /* 48. */ | |
696 | HOWTO (R_CKCORE_GOT_IMM18BY4, /* type */ | |
697 | 2, /* rightshift */ | |
698 | 2, /* size */ | |
699 | 18, /* bitsize */ | |
700 | FALSE, /* pc_relative */ | |
701 | 0, /* bitpos */ | |
702 | complain_overflow_bitfield, /* complain_on_overflow */ | |
703 | bfd_elf_generic_reloc, /* special_function */ | |
704 | "R_CKCORE_GOT_IMM18BY4", /* name */ | |
705 | TRUE, /* partial_inplace */ | |
706 | 0xfffc, /* src_mask */ | |
707 | 0x3ffff, /* dst_mask */ | |
708 | FALSE), /* pcrel_offset */ | |
709 | ||
710 | /* 49. */ | |
711 | HOWTO (R_CKCORE_PLT_IMM18BY4, /* type */ | |
712 | 2, /* rightshift */ | |
713 | 2, /* size */ | |
714 | 18, /* bitsize */ | |
715 | FALSE, /* pc_relative */ | |
716 | 0, /* bitpos */ | |
717 | complain_overflow_bitfield, /* complain_on_overflow */ | |
718 | bfd_elf_generic_reloc, /* special_function */ | |
719 | "R_CKCORE_PLT_IMM18BY4", /* name */ | |
720 | TRUE, /* partial_inplace */ | |
721 | 0xfffc, /* src_mask */ | |
722 | 0x3ffff, /* dst_mask */ | |
723 | TRUE), /* pcrel_offset */ | |
724 | ||
725 | /* 50: for lrw16. */ | |
726 | HOWTO (R_CKCORE_PCREL_IMM7BY4, /* type */ | |
727 | 2, /* rightshift */ | |
728 | 1, /* size */ | |
729 | 7, /* bitsize */ | |
730 | TRUE, /* pc_relative */ | |
731 | 0, /* bitpos */ | |
732 | complain_overflow_bitfield, /* complain_on_overflow */ | |
733 | bfd_elf_generic_reloc, /* special_function */ | |
734 | "R_CKCORE_PCREL_IMM7BY4", /* name */ | |
735 | FALSE, /* partial_inplace */ | |
736 | 0xec1f, /* src_mask */ | |
737 | 0x31f, /* dst_mask */ | |
738 | TRUE), /* pcrel_offset */ | |
739 | ||
740 | /* 51: for static nptl. */ | |
741 | HOWTO (R_CKCORE_TLS_LE32, /* type */ | |
742 | 0, /* rightshift */ | |
743 | 2, /* size */ | |
744 | 32, /* bitsize */ | |
745 | FALSE, /* pc_relative */ | |
746 | 0, /* bitpos */ | |
747 | complain_overflow_dont, /* complain_on_overflow */ | |
748 | bfd_elf_generic_reloc, /* special_function */ | |
749 | "R_CKCORE_TLS_LE32", /* name */ | |
750 | FALSE, /* partial_inplace */ | |
751 | 0x0, /* src_mask */ | |
752 | 0xffffffff, /* dst_mask */ | |
753 | TRUE), /* pcrel_offset */ | |
754 | ||
755 | /* 52: for static nptl. */ | |
756 | HOWTO (R_CKCORE_TLS_IE32, /* type */ | |
757 | 0, /* rightshift */ | |
758 | 2, /* size */ | |
759 | 32, /* bitsize */ | |
760 | FALSE, /* pc_relative */ | |
761 | 0, /* bitpos */ | |
762 | complain_overflow_dont, /* complain_on_overflow */ | |
763 | bfd_elf_generic_reloc, /* special_function */ | |
764 | "R_CKCORE_TLS_IE32", /* name */ | |
765 | FALSE, /* partial_inplace */ | |
766 | 0x0, /* src_mask */ | |
767 | 0xffffffff, /* dst_mask */ | |
768 | TRUE), /* pcrel_offset */ | |
769 | ||
770 | /* 53: for pic nptl. */ | |
771 | HOWTO (R_CKCORE_TLS_GD32, /* type */ | |
772 | 0, /* rightshift */ | |
773 | 2, /* size */ | |
774 | 32, /* bitsize */ | |
775 | FALSE, /* pc_relative */ | |
776 | 0, /* bitpos */ | |
777 | complain_overflow_dont, /* complain_on_overflow */ | |
778 | bfd_elf_generic_reloc, /* special_function */ | |
779 | "R_CKCORE_TLS_GD32", /* name */ | |
780 | FALSE, /* partial_inplace */ | |
781 | 0x0, /* src_mask */ | |
782 | 0xffffffff, /* dst_mask */ | |
783 | TRUE), /* pcrel_offset */ | |
784 | ||
785 | /* 54: for pic nptl. */ | |
786 | HOWTO (R_CKCORE_TLS_LDM32, /* type */ | |
787 | 0, /* rightshift */ | |
788 | 2, /* size */ | |
789 | 32, /* bitsize */ | |
790 | FALSE, /* pc_relative */ | |
791 | 0, /* bitpos */ | |
792 | complain_overflow_dont, /* complain_on_overflow */ | |
793 | bfd_elf_generic_reloc, /* special_function */ | |
794 | "R_CKCORE_TLS_LDM32", /* name */ | |
795 | FALSE, /* partial_inplace */ | |
796 | 0x0, /* src_mask */ | |
797 | 0xffffffff, /* dst_mask */ | |
798 | TRUE), /* pcrel_offset */ | |
799 | ||
800 | /* 55: for pic nptl. */ | |
801 | HOWTO (R_CKCORE_TLS_LDO32, /* type */ | |
802 | 0, /* rightshift */ | |
803 | 2, /* size */ | |
804 | 32, /* bitsize */ | |
805 | FALSE, /* pc_relative */ | |
806 | 0, /* bitpos */ | |
807 | complain_overflow_dont, /* complain_on_overflow */ | |
808 | bfd_elf_generic_reloc, /* special_function */ | |
809 | "R_CKCORE_TLS_LDO32", /* name */ | |
810 | FALSE, /* partial_inplace */ | |
811 | 0x0, /* src_mask */ | |
812 | 0xffffffff, /* dst_mask */ | |
813 | TRUE), /* pcrel_offset */ | |
814 | ||
815 | /* 56: for linker. */ | |
816 | HOWTO (R_CKCORE_TLS_DTPMOD32,0,0,0,0,0,0,0,"R_CKCORE_TLS_DTPMOD32",0,0,0,0), | |
817 | ||
818 | /* 57: for linker. */ | |
819 | HOWTO (R_CKCORE_TLS_DTPOFF32,0,0,0,0,0,0,0,"R_CKCORE_TLS_DTPOFF32",0,0,0,0), | |
820 | ||
821 | /* 58: for linker. */ | |
822 | HOWTO (R_CKCORE_TLS_TPOFF32,0,0,0,0,0,0,0,"R_CKCORE_TLS_TPOFF32",0,0,0,0), | |
823 | ||
824 | /* 59: for ck807f. */ | |
825 | HOWTO (R_CKCORE_PCREL_FLRW_IMM8BY4, /* type */ | |
826 | 2, /* rightshift */ | |
827 | 2, /* size */ | |
828 | 8, /* bitsize */ | |
829 | TRUE, /* pc_relative */ | |
830 | 0, /* bitpos */ | |
831 | complain_overflow_bitfield, /* complain_on_overflow */ | |
832 | NULL, /* special_function */ | |
833 | "R_CKCORE_PCREL_FLRW_IMM8BY4", /* name */ | |
834 | FALSE, /* partial_inplace */ | |
835 | 0xfe1fff0f, /* src_mask */ | |
836 | 0x1e000f0, /* dst_mask */ | |
837 | TRUE), /* pcrel_offset */ | |
838 | ||
839 | /* 60: for 810 not to generate jsri. */ | |
840 | HOWTO (R_CKCORE_NOJSRI, /* type */ | |
841 | 0, /* rightshift */ | |
842 | 2, /* size */ | |
843 | 32, /* bitsize */ | |
844 | FALSE, /* pc_relative */ | |
845 | 0, /* bitpos */ | |
846 | complain_overflow_dont, /* complain_on_overflow */ | |
847 | bfd_elf_generic_reloc, /* special_function */ | |
848 | "R_CKCORE_NOJSRI", /* name */ | |
849 | FALSE, /* partial_inplace */ | |
850 | 0xffff, /* src_mask */ | |
851 | 0xffff, /* dst_mask */ | |
852 | FALSE), /* pcrel_offset */ | |
853 | ||
854 | /* 61: for callgraph. */ | |
855 | HOWTO (R_CKCORE_CALLGRAPH, /* type */ | |
856 | 0, /* rightshift */ | |
857 | 0, /* size */ | |
858 | 0, /* bitsize */ | |
859 | FALSE, /* pc_relative */ | |
860 | 0, /* bitpos */ | |
861 | complain_overflow_dont, /* complain_on_overflow */ | |
862 | NULL, /* special_function */ | |
863 | "R_CKCORE_CALLGRAPH", /* name */ | |
864 | FALSE, /* partial_inplace */ | |
865 | 0x0, /* src_mask */ | |
866 | 0x0, /* dst_mask */ | |
867 | TRUE), /* pcrel_offset */ | |
868 | ||
869 | /* 62: IRELATIVE*/ | |
870 | HOWTO (R_CKCORE_IRELATIVE,0,0,0,0,0,0,0,"R_CKCORE_IRELATIVE",0,0,0,0), | |
871 | ||
872 | /* 63: for bloop instruction */ | |
873 | HOWTO (R_CKCORE_PCREL_BLOOP_IMM4BY4, /* type */ | |
874 | 1, /* rightshift */ | |
875 | 2, /* size */ | |
876 | 4, /* bitsize */ | |
877 | 1, /* pc_relative */ | |
878 | 0, /* bitpos */ | |
879 | complain_overflow_signed, /* complain_on_overflow */ | |
880 | bfd_elf_generic_reloc, /* special_function */ | |
881 | "R_CKCORE_PCREL_BLOOP_IMM4BY4", /* name */ | |
882 | FALSE, /* partial_inplace */ | |
883 | 0x0, /* src_mask */ | |
884 | 0xf, /* dst_mask */ | |
885 | TRUE), /* pcrel_offset */ | |
886 | /* 64: for bloop instruction */ | |
887 | HOWTO (R_CKCORE_PCREL_BLOOP_IMM12BY4, /* type */ | |
888 | 1, /* rightshift */ | |
889 | 2, /* size */ | |
890 | 12, /* bitsize */ | |
891 | 1, /* pc_relative */ | |
892 | 0, /* bitpos */ | |
893 | complain_overflow_signed, /* complain_on_overflow */ | |
894 | bfd_elf_generic_reloc, /* special_function */ | |
895 | "R_CKCORE_PCREL_BLOOP_IMM12BY4", /* name */ | |
896 | FALSE, /* partial_inplace */ | |
897 | 0x0, /* src_mask */ | |
898 | 0xfff, /* dst_mask */ | |
899 | TRUE), /* pcrel_offset */ | |
900 | ||
901 | ||
902 | }; | |
903 | ||
904 | ||
905 | /* Whether GOT overflow checking is needed. */ | |
906 | static int check_got_overflow = 0; | |
907 | ||
908 | /* Whether the target 32 bits is forced so that the high | |
909 | 16 bits is at the low address. */ | |
910 | static int need_reverse_bits; | |
911 | ||
912 | /* Used for relaxation. See csky_relocate_contents. */ | |
913 | static bfd_vma read_content_substitute; | |
914 | ||
915 | /* NOTICE! | |
916 | The way the following two look-up functions work demands | |
917 | that BFD_RELOC_CKCORE_xxx are defined contiguously. */ | |
918 | ||
919 | static reloc_howto_type * | |
920 | csky_elf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, | |
921 | bfd_reloc_code_real_type code) | |
922 | { | |
923 | int csky_code = code - BFD_RELOC_CKCORE_NONE; | |
924 | ||
925 | if (csky_code < 0 || csky_code >= R_CKCORE_MAX) | |
926 | { | |
927 | switch (code) | |
928 | { | |
929 | case BFD_RELOC_NONE: | |
930 | csky_code = R_CKCORE_NONE; | |
931 | break; | |
932 | case BFD_RELOC_32: | |
933 | csky_code = R_CKCORE_ADDR32; | |
934 | break; | |
935 | case BFD_RELOC_32_PCREL: | |
936 | csky_code = R_CKCORE_PCREL32; | |
937 | break; | |
938 | case BFD_RELOC_VTABLE_INHERIT: | |
939 | csky_code = R_CKCORE_GNU_VTINHERIT; | |
940 | break; | |
941 | case BFD_RELOC_VTABLE_ENTRY: | |
942 | csky_code = R_CKCORE_GNU_VTENTRY; | |
943 | break; | |
944 | case BFD_RELOC_RVA: | |
945 | csky_code = R_CKCORE_RELATIVE; | |
946 | break; | |
947 | default: | |
948 | return (reloc_howto_type *)NULL; | |
949 | } | |
950 | } | |
951 | /* Note: when adding csky bfd reloc types in bfd-in2.h | |
952 | and csky elf reloc types in elf/csky.h, | |
953 | the order of the two reloc type tables should be consistent. */ | |
954 | return &csky_elf_howto_table[csky_code]; | |
955 | } | |
956 | ||
957 | static reloc_howto_type * | |
958 | csky_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
959 | const char *r_name) | |
960 | { | |
961 | unsigned int i; | |
962 | for (i = 0; i < R_CKCORE_MAX; i++) | |
963 | if (strcasecmp (csky_elf_howto_table[i].name, r_name) == 0) | |
964 | return &csky_elf_howto_table[i]; | |
965 | return NULL; | |
966 | } | |
967 | ||
968 | static reloc_howto_type * | |
969 | elf32_csky_howto_from_type (unsigned int r_type) | |
970 | { | |
971 | if (r_type < R_CKCORE_MAX) | |
972 | return &csky_elf_howto_table[r_type]; | |
973 | else | |
974 | return NULL; | |
975 | } | |
976 | ||
977 | static bfd_boolean | |
978 | csky_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, | |
979 | arelent *cache_ptr, | |
980 | Elf_Internal_Rela *dst) | |
981 | { | |
982 | unsigned int r_type; | |
983 | ||
984 | r_type = ELF32_R_TYPE (dst->r_info); | |
985 | cache_ptr->howto = elf32_csky_howto_from_type (r_type); | |
986 | if (cache_ptr->howto == NULL) | |
987 | { | |
988 | /* xgettext:c-format */ | |
989 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), | |
990 | abfd, r_type); | |
991 | bfd_set_error (bfd_error_bad_value); | |
992 | return FALSE; | |
993 | } | |
994 | return TRUE; | |
995 | } | |
996 | ||
997 | /* The Global Offset Table max size. */ | |
998 | #define GOT_MAX_SIZE 0xFFFF8 | |
999 | ||
1000 | /* The name of the dynamic interpreter. This is put in the .interp | |
1001 | section. */ | |
1002 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
1003 | ||
1004 | /* The size in bytes of an entry in the procedure linkage table. */ | |
1005 | #define PLT_ENTRY_SIZE 12 | |
1006 | #define PLT_ENTRY_SIZE_P 16 | |
1007 | ||
1008 | /* The first entry in a procedure linkage table looks like | |
1009 | this. It is set up so that any shared library function that is | |
1010 | called before the relocation has been set up calls the dynamic | |
1011 | linker first. */ | |
1012 | static const bfd_vma csky_elf_plt_entry_v2[PLT_ENTRY_SIZE / 4] = | |
1013 | { | |
1014 | 0xd99c2002, /* ldw r12, (gb, 8) */ | |
1015 | 0xea0d0000, /* movi r13,offset */ | |
1016 | 0xe8cc0000 /* jmp r12 */ | |
1017 | }; | |
1018 | ||
1019 | static const bfd_vma csky_elf_plt_entry_v1[PLT_ENTRY_SIZE / 2 ] = | |
1020 | { | |
1021 | 0x25f0, /* subi r0, 32 */ | |
1022 | 0x9200, /* stw r2, (r0, 0) */ | |
1023 | 0x9310, /* stw r3, (r0, 4) */ | |
1024 | 0x822e, /* ldw r2, (gb, 8) */ | |
1025 | 0x7301, /* lrw r3, #offset */ | |
1026 | 0x00c2, /* jmp r2 */ | |
1027 | }; | |
1028 | ||
1029 | /* Branch stub support. */ | |
1030 | ||
1031 | enum stub_insn_type | |
1032 | { | |
1033 | INSN16, | |
1034 | INSN32, | |
1035 | DATA_TYPE | |
1036 | }; | |
1037 | ||
1038 | bfd_boolean use_branch_stub = TRUE; | |
1039 | typedef struct | |
1040 | { | |
1041 | bfd_vma data; | |
1042 | enum stub_insn_type type; | |
1043 | unsigned int r_type; | |
1044 | int reloc_addend; | |
1045 | } insn_sequence; | |
1046 | ||
1047 | static const insn_sequence elf32_csky_stub_long_branch[] = | |
1048 | { | |
1049 | {0xea8d0002, INSN32, R_CKCORE_NONE, 0x0}, /* lrw t1,[pc+8] */ | |
1050 | {0x7834, INSN16, R_CKCORE_NONE, 0x0}, /* jmp t1 */ | |
1051 | {0x6c03, INSN16, R_CKCORE_NONE, 0x0}, /* nop */ | |
1052 | {0x0, DATA_TYPE, R_CKCORE_ADDR32, 0x0} /* .long addr */ | |
1053 | }; | |
1054 | ||
1055 | static const insn_sequence elf32_csky_stub_long_branch_jmpi[] = | |
1056 | { | |
1057 | {0xeac00001, INSN32, R_CKCORE_NONE, 0x0}, /* jmpi [pc+4] */ | |
1058 | {0x0, DATA_TYPE, R_CKCORE_ADDR32, 0x0} /* .long addr */ | |
1059 | }; | |
1060 | ||
1061 | /* The bsr instruction offset limit. */ | |
1062 | #define BSR_MAX_FWD_BRANCH_OFFSET (((1 << 25) - 1) << 1) | |
1063 | #define BSR_MAX_BWD_BRANCH_OFFSET (-(1 << 26)) | |
1064 | ||
1065 | #define STUB_SUFFIX ".stub" | |
1066 | #define STUB_ENTRY_NAME "__%s_veneer" | |
1067 | ||
1068 | /* One entry per long/short branch stub defined above. */ | |
1069 | #define DEF_STUBS \ | |
1070 | DEF_STUB(long_branch) \ | |
1071 | DEF_STUB(long_branch_jmpi) | |
1072 | ||
1073 | #define DEF_STUB(x) csky_stub_##x, | |
1074 | enum elf32_csky_stub_type | |
1075 | { | |
1076 | csky_stub_none, | |
1077 | DEF_STUBS | |
1078 | }; | |
1079 | #undef DEF_STUB | |
1080 | ||
1081 | typedef struct | |
1082 | { | |
1083 | const insn_sequence* template_sequence; | |
1084 | int template_size; | |
1085 | } stub_def; | |
1086 | ||
1087 | #define DEF_STUB(x) {elf32_csky_stub_##x, ARRAY_SIZE(elf32_csky_stub_##x)}, | |
1088 | static const stub_def stub_definitions[] = { | |
1089 | {NULL, 0}, | |
1090 | DEF_STUBS | |
1091 | }; | |
1092 | ||
1093 | /* The size of the thread control block. */ | |
1094 | #define TCB_SIZE 8 | |
1095 | ||
1096 | struct csky_elf_obj_tdata | |
1097 | { | |
1098 | struct elf_obj_tdata root; | |
1099 | ||
1100 | /* tls_type for each local got entry. */ | |
1101 | char *local_got_tls_type; | |
1102 | }; | |
1103 | ||
1104 | #define csky_elf_local_got_tls_type(bfd) \ | |
1105 | (csky_elf_tdata (bfd)->local_got_tls_type) | |
1106 | ||
1107 | #define csky_elf_tdata(bfd) \ | |
1108 | ((struct csky_elf_obj_tdata *) (bfd)->tdata.any) | |
1109 | ||
1110 | struct elf32_csky_stub_hash_entry | |
1111 | { | |
1112 | /* Base hash table entry structure. */ | |
1113 | struct bfd_hash_entry root; | |
1114 | ||
1115 | /* The stub section. */ | |
1116 | asection *stub_sec; | |
1117 | ||
1118 | /* Offset within stub_sec of the beginning of this stub. */ | |
1119 | bfd_vma stub_offset; | |
1120 | ||
1121 | /* Given the symbol's value and its section we can determine its final | |
1122 | value when building the stubs (so the stub knows where to jump). */ | |
1123 | bfd_vma target_value; | |
1124 | asection *target_section; | |
1125 | ||
1126 | /* Offset to apply to relocation referencing target_value. */ | |
1127 | bfd_vma target_addend; | |
1128 | ||
1129 | /* The stub type. */ | |
1130 | enum elf32_csky_stub_type stub_type; | |
1131 | /* Its encoding size in bytes. */ | |
1132 | int stub_size; | |
1133 | /* Its template. */ | |
1134 | const insn_sequence *stub_template; | |
1135 | /* The size of the template (number of entries). */ | |
1136 | int stub_template_size; | |
1137 | ||
1138 | /* The symbol table entry, if any, that this was derived from. */ | |
1139 | struct csky_elf_link_hash_entry *h; | |
1140 | ||
1141 | /* Destination symbol type. */ | |
1142 | unsigned char st_type; | |
1143 | ||
1144 | /* Where this stub is being called from, or, in the case of combined | |
1145 | stub sections, the first input section in the group. */ | |
1146 | asection *id_sec; | |
1147 | ||
1148 | /* The name for the local symbol at the start of this stub. The | |
1149 | stub name in the hash table has to be unique; this does not, so | |
1150 | it can be friendlier. */ | |
1151 | char *output_name; | |
1152 | }; | |
1153 | ||
1154 | #define csky_stub_hash_lookup(table, string, create, copy) \ | |
1155 | ((struct elf32_csky_stub_hash_entry *) \ | |
1156 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
1157 | ||
1158 | /* C-SKY ELF linker hash entry. */ | |
1159 | struct csky_elf_link_hash_entry | |
1160 | { | |
1161 | struct elf_link_hash_entry elf; | |
1162 | int plt_refcount; | |
1163 | /* For sub jsri2bsr relocs count. */ | |
1164 | int jsri2bsr_refcount; | |
1165 | /* Track dynamic relocs copied for this symbol. */ | |
1166 | struct elf_dyn_relocs *dyn_relocs; | |
1167 | ||
1168 | #define GOT_UNKNOWN 0 | |
1169 | #define GOT_NORMAL 1 | |
1170 | #define GOT_TLS_GD 2 | |
1171 | #define GOT_TLS_IE 4 | |
1172 | ||
1173 | unsigned char tls_type; | |
1174 | ||
1175 | /* A pointer to the most recently used stub hash entry against this | |
1176 | symbol. */ | |
1177 | struct elf32_csky_stub_hash_entry *stub_cache; | |
1178 | }; | |
1179 | ||
1180 | /* Traverse an C-SKY ELF linker hash table. */ | |
1181 | #define csky_elf_link_hash_traverse(table, func, info) \ | |
1182 | (elf_link_hash_traverse \ | |
1183 | (&(table)->root, \ | |
1184 | (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
1185 | (info))) | |
1186 | ||
1187 | /* Get the C-SKY ELF linker hash table from a link_info structure. */ | |
1188 | #define csky_elf_hash_table(info) \ | |
1189 | ((elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \ | |
1190 | == CSKY_ELF_DATA) \ | |
1191 | ? ((struct csky_elf_link_hash_table *) ((info)->hash)) \ | |
1192 | : NULL) | |
1193 | ||
1194 | #define csky_elf_hash_entry(ent) ((struct csky_elf_link_hash_entry*)(ent)) | |
1195 | ||
1196 | /* Array to keep track of which stub sections have been created, and | |
1197 | information on stub grouping. */ | |
1198 | struct map_stub | |
1199 | { | |
1200 | /* This is the section to which stubs in the group will be | |
1201 | attached. */ | |
1202 | asection *link_sec; | |
1203 | /* The stub section. */ | |
1204 | asection *stub_sec; | |
1205 | }; | |
1206 | ||
1207 | /* C-SKY ELF linker hash table. */ | |
1208 | struct csky_elf_link_hash_table | |
1209 | { | |
1210 | struct elf_link_hash_table elf; | |
1211 | ||
1212 | /* Small local sym cache. */ | |
1213 | struct sym_cache sym_cache; | |
1214 | ||
1215 | /* Data for R_CKCORE_TLS_LDM32 relocations. */ | |
1216 | union | |
1217 | { | |
1218 | bfd_signed_vma refcount; | |
1219 | bfd_vma offset; | |
1220 | } tls_ldm_got; | |
1221 | ||
1222 | /* The stub hash table. */ | |
1223 | struct bfd_hash_table stub_hash_table; | |
1224 | ||
1225 | /* Linker stub bfd. */ | |
1226 | bfd *stub_bfd; | |
1227 | ||
1228 | /* Linker call-backs. */ | |
1229 | asection * (*add_stub_section) (const char *, asection *); | |
1230 | void (*layout_sections_again) (void); | |
1231 | ||
1232 | /* Array to keep track of which stub sections have been created, and | |
1233 | * information on stub grouping. */ | |
1234 | struct map_stub *stub_group; | |
1235 | ||
1236 | /* Number of elements in stub_group. */ | |
1237 | unsigned int top_id; | |
1238 | ||
1239 | /* Assorted information used by elf32_csky_size_stubs. */ | |
1240 | unsigned int bfd_count; | |
1241 | unsigned int top_index; | |
1242 | asection **input_list; | |
1243 | }; | |
1244 | ||
1245 | /* We can't change vectors in the bfd target which will apply to | |
1246 | data sections, however we only do this to the text sections. */ | |
1247 | ||
1248 | static bfd_vma | |
1249 | csky_get_insn_32 (bfd *input_bfd, | |
1250 | bfd_byte *location) | |
1251 | { | |
1252 | if (bfd_big_endian (input_bfd)) | |
1253 | return bfd_get_32 (input_bfd, location); | |
1254 | else | |
1255 | return (bfd_get_16 (input_bfd, location) << 16 | |
1256 | | bfd_get_16 (input_bfd, location + 2)); | |
1257 | } | |
1258 | ||
1259 | static void | |
1260 | csky_put_insn_32 (bfd *input_bfd, | |
1261 | bfd_vma x, | |
1262 | bfd_byte *location) | |
1263 | { | |
1264 | if (bfd_big_endian (input_bfd)) | |
1265 | bfd_put_32 (input_bfd, x, location); | |
1266 | else | |
1267 | { | |
1268 | bfd_put_16 (input_bfd, x >> 16, location); | |
1269 | bfd_put_16 (input_bfd, x & 0xffff, location + 2); | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | /* Find or create a stub section. Returns a pointer to the stub section, and | |
1274 | the section to which the stub section will be attached (in *LINK_SEC_P). | |
1275 | LINK_SEC_P may be NULL. */ | |
1276 | ||
1277 | static asection * | |
1278 | elf32_csky_create_or_find_stub_sec (asection **link_sec_p, asection *section, | |
1279 | struct csky_elf_link_hash_table *htab) | |
1280 | { | |
1281 | asection *link_sec; | |
1282 | asection *stub_sec; | |
1283 | ||
1284 | link_sec = htab->stub_group[section->id].link_sec; | |
1285 | stub_sec = htab->stub_group[section->id].stub_sec; | |
1286 | if (stub_sec == NULL) | |
1287 | { | |
1288 | stub_sec = htab->stub_group[link_sec->id].stub_sec; | |
1289 | if (stub_sec == NULL) | |
1290 | { | |
1291 | size_t namelen; | |
1292 | bfd_size_type len; | |
1293 | char *s_name; | |
1294 | ||
1295 | namelen = strlen (link_sec->name); | |
1296 | len = namelen + sizeof (STUB_SUFFIX); | |
1297 | s_name = bfd_alloc (htab->stub_bfd, len); | |
1298 | if (s_name == NULL) | |
1299 | return NULL; | |
1300 | ||
1301 | memcpy (s_name, link_sec->name, namelen); | |
1302 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); | |
1303 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); | |
1304 | if (stub_sec == NULL) | |
1305 | return NULL; | |
1306 | htab->stub_group[link_sec->id].stub_sec = stub_sec; | |
1307 | } | |
1308 | htab->stub_group[section->id].stub_sec = stub_sec; | |
1309 | } | |
1310 | ||
1311 | if (link_sec_p) | |
1312 | *link_sec_p = link_sec; | |
1313 | ||
1314 | return stub_sec; | |
1315 | } | |
1316 | ||
1317 | /* Build a name for an entry in the stub hash table. */ | |
1318 | ||
1319 | static char * | |
1320 | elf32_csky_stub_name (const asection *input_section, | |
1321 | const asection *sym_sec, | |
1322 | const struct csky_elf_link_hash_entry *hash, | |
1323 | const Elf_Internal_Rela *rel) | |
1324 | { | |
1325 | char *stub_name; | |
1326 | bfd_size_type len; | |
1327 | ||
1328 | if (hash) | |
1329 | { | |
1330 | len = 8 + 1 + strlen (hash->elf.root.root.string) + 1 + 8 + 1; | |
1331 | stub_name = bfd_malloc (len); | |
1332 | if (stub_name != NULL) | |
1333 | sprintf (stub_name, "%08x_%s+%x", | |
1334 | input_section->id & 0xffffffff, | |
1335 | hash->elf.root.root.string, | |
1336 | (int) rel->r_addend & 0xffffffff); | |
1337 | } | |
1338 | else | |
1339 | { | |
1340 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; | |
1341 | stub_name = bfd_malloc (len); | |
1342 | if (stub_name != NULL) | |
1343 | sprintf (stub_name, "%08x_%x:%x+%x", | |
1344 | input_section->id & 0xffffffff, | |
1345 | sym_sec->id & 0xffffffff, | |
1346 | (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, | |
1347 | (int) rel->r_addend & 0xffffffff); | |
1348 | } | |
1349 | ||
1350 | return stub_name; | |
1351 | } | |
1352 | ||
1353 | /* Determine the type of stub needed, if any, for a call. */ | |
1354 | ||
1355 | static enum elf32_csky_stub_type | |
1356 | csky_type_of_stub (struct bfd_link_info *info, | |
1357 | asection *input_sec, | |
1358 | const Elf_Internal_Rela *rel, | |
1359 | unsigned char st_type, | |
1360 | struct csky_elf_link_hash_entry *hash, | |
1361 | bfd_vma destination, | |
1362 | asection *sym_sec ATTRIBUTE_UNUSED, | |
1363 | bfd *input_bfd ATTRIBUTE_UNUSED, | |
1364 | const char *name ATTRIBUTE_UNUSED) | |
1365 | { | |
1366 | bfd_vma location; | |
1367 | bfd_signed_vma branch_offset; | |
1368 | unsigned int r_type; | |
1369 | enum elf32_csky_stub_type stub_type = csky_stub_none; | |
1370 | struct elf_link_hash_entry * h = &hash->elf; | |
1371 | ||
1372 | /* We don't know the actual type of destination in case it is of | |
1373 | type STT_SECTION: give up. */ | |
1374 | if (st_type == STT_SECTION) | |
1375 | return stub_type; | |
1376 | ||
1377 | location = (input_sec->output_offset | |
1378 | + input_sec->output_section->vma | |
1379 | + rel->r_offset); | |
1380 | ||
1381 | branch_offset = (bfd_signed_vma)(destination - location); | |
1382 | r_type = ELF32_R_TYPE (rel->r_info); | |
1383 | if (r_type == R_CKCORE_PCREL_IMM26BY2 | |
1384 | && ((h != NULL | |
1385 | && ((h->def_dynamic && !h->def_regular) | |
1386 | || (bfd_link_pic (info) | |
1387 | && h->root.type == bfd_link_hash_defweak))) | |
1388 | || branch_offset > BSR_MAX_FWD_BRANCH_OFFSET | |
1389 | || branch_offset < BSR_MAX_BWD_BRANCH_OFFSET)) | |
1390 | { | |
1391 | if (bfd_csky_arch (info->output_bfd) == CSKY_ARCH_810 | |
1392 | || bfd_csky_arch (info->output_bfd) == CSKY_ARCH_807) | |
1393 | stub_type = csky_stub_long_branch_jmpi; | |
1394 | else | |
1395 | stub_type = csky_stub_long_branch; | |
1396 | } | |
1397 | ||
1398 | return stub_type; | |
1399 | } | |
1400 | ||
1401 | /* Create an entry in an C-SKY ELF linker hash table. */ | |
1402 | ||
1403 | static struct bfd_hash_entry * | |
1404 | csky_elf_link_hash_newfunc (struct bfd_hash_entry * entry, | |
1405 | struct bfd_hash_table * table, | |
1406 | const char * string) | |
1407 | { | |
1408 | struct csky_elf_link_hash_entry * ret = | |
1409 | (struct csky_elf_link_hash_entry *) entry; | |
1410 | ||
1411 | /* Allocate the structure if it has not already been allocated by a | |
1412 | subclass. */ | |
1413 | if (ret == NULL) | |
1414 | { | |
1415 | ret = (struct csky_elf_link_hash_entry *) | |
1416 | bfd_hash_allocate (table, | |
1417 | sizeof (struct csky_elf_link_hash_entry)); | |
1418 | if (ret == NULL) | |
1419 | return (struct bfd_hash_entry *) ret; | |
1420 | } | |
1421 | ||
1422 | /* Call the allocation method of the superclass. */ | |
1423 | ret = ((struct csky_elf_link_hash_entry *) | |
1424 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *)ret, | |
1425 | table, string)); | |
1426 | if (ret != NULL) | |
1427 | { | |
1428 | struct csky_elf_link_hash_entry *eh; | |
1429 | ||
1430 | eh = (struct csky_elf_link_hash_entry *) ret; | |
1431 | eh->dyn_relocs = NULL; | |
1432 | eh->plt_refcount = 0; | |
1433 | eh->jsri2bsr_refcount = 0; | |
1434 | eh->tls_type = GOT_NORMAL; | |
1435 | ret->stub_cache = NULL; | |
1436 | } | |
1437 | ||
1438 | return (struct bfd_hash_entry *) ret; | |
1439 | } | |
1440 | ||
1441 | /* Initialize an entry in the stub hash table. */ | |
1442 | ||
1443 | static struct bfd_hash_entry * | |
1444 | stub_hash_newfunc (struct bfd_hash_entry *entry, | |
1445 | struct bfd_hash_table *table, | |
1446 | const char *string) | |
1447 | { | |
1448 | /* Allocate the structure if it has not already been allocated by a | |
1449 | subclass. */ | |
1450 | if (entry == NULL) | |
1451 | { | |
1452 | entry = ((struct bfd_hash_entry *) | |
1453 | bfd_hash_allocate (table, | |
1454 | sizeof (struct elf32_csky_stub_hash_entry))); | |
1455 | if (entry == NULL) | |
1456 | return entry; | |
1457 | } | |
1458 | ||
1459 | /* Call the allocation method of the superclass. */ | |
1460 | entry = bfd_hash_newfunc (entry, table, string); | |
1461 | if (entry != NULL) | |
1462 | { | |
1463 | struct elf32_csky_stub_hash_entry *eh; | |
1464 | ||
1465 | /* Initialize the local fields. */ | |
1466 | eh = (struct elf32_csky_stub_hash_entry *) entry; | |
1467 | eh->stub_sec = NULL; | |
1468 | eh->stub_offset = 0; | |
1469 | eh->target_value = 0; | |
1470 | eh->target_section = NULL; | |
1471 | eh->target_addend = 0; | |
1472 | eh->stub_type = csky_stub_none; | |
1473 | eh->stub_size = 0; | |
1474 | eh->stub_template = NULL; | |
1475 | eh->stub_template_size = -1; | |
1476 | eh->h = NULL; | |
1477 | eh->id_sec = NULL; | |
1478 | eh->output_name = NULL; | |
1479 | } | |
1480 | ||
1481 | return entry; | |
1482 | } | |
1483 | ||
1484 | /* Free the derived linker hash table. */ | |
1485 | ||
1486 | static void | |
1487 | csky_elf_link_hash_table_free (bfd *obfd) | |
1488 | { | |
1489 | struct csky_elf_link_hash_table *ret | |
1490 | = (struct csky_elf_link_hash_table *) obfd->link.hash; | |
1491 | ||
1492 | bfd_hash_table_free (&ret->stub_hash_table); | |
1493 | _bfd_elf_link_hash_table_free (obfd); | |
1494 | } | |
1495 | ||
1496 | /* Create an CSKY elf linker hash table. */ | |
1497 | ||
1498 | static struct bfd_link_hash_table * | |
1499 | csky_elf_link_hash_table_create (bfd *abfd) | |
1500 | { | |
1501 | struct csky_elf_link_hash_table *ret; | |
1502 | bfd_size_type amt = sizeof (struct csky_elf_link_hash_table); | |
1503 | ||
1504 | ret = (struct csky_elf_link_hash_table*) bfd_zmalloc (amt); | |
1505 | if (ret == NULL) | |
1506 | return NULL; | |
1507 | ||
1508 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, | |
1509 | csky_elf_link_hash_newfunc, | |
1510 | sizeof (struct csky_elf_link_hash_entry), | |
1511 | CSKY_ELF_DATA)) | |
1512 | { | |
1513 | free (ret); | |
1514 | return NULL; | |
1515 | } | |
1516 | ||
1517 | if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc, | |
1518 | sizeof (struct elf32_csky_stub_hash_entry))) | |
1519 | { | |
1520 | free (ret); | |
1521 | return NULL; | |
1522 | } | |
1523 | ret->elf.root.hash_table_free = csky_elf_link_hash_table_free; | |
1524 | return &ret->elf.root; | |
1525 | } | |
1526 | ||
1527 | static bfd_boolean | |
1528 | csky_elf_mkobject (bfd *abfd) | |
1529 | { | |
1530 | return bfd_elf_allocate_object (abfd, sizeof (struct csky_elf_obj_tdata), | |
1531 | CSKY_ELF_DATA); | |
1532 | } | |
1533 | ||
1534 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1535 | regular object. The current definition is in some section of the | |
1536 | dynamic object, but we're not including those sections. We have to | |
1537 | change the definition to something the rest of the link can | |
1538 | understand. */ | |
1539 | ||
1540 | static bfd_boolean | |
1541 | csky_elf_adjust_dynamic_symbol (struct bfd_link_info *info, | |
1542 | struct elf_link_hash_entry *h) | |
1543 | { | |
1544 | struct csky_elf_link_hash_entry *eh; | |
1545 | struct csky_elf_link_hash_table *htab; | |
1546 | asection *srel; | |
1547 | asection *s; | |
1548 | eh = (struct csky_elf_link_hash_entry *)h; | |
1549 | if (eh == NULL) | |
1550 | return FALSE; | |
1551 | ||
1552 | htab = csky_elf_hash_table (info); | |
1553 | if (htab == NULL) | |
1554 | return FALSE; | |
1555 | ||
1556 | /* Clear jsri2bsr_refcount, if creating shared library files. */ | |
1557 | if (bfd_link_pic (info) && eh->jsri2bsr_refcount > 0) | |
1558 | eh->jsri2bsr_refcount = 0; | |
1559 | ||
1560 | /* If there is a function, put it in the procedure linkage table. We | |
1561 | will fill in the contents of the procedure linkage table later. */ | |
1562 | if (h->needs_plt) | |
1563 | { | |
1564 | /* Calls to STT_GNU_IFUNC symbols always use a PLT, even if the | |
1565 | symbol binds locally. */ | |
1566 | if (h->plt.refcount <= 0 | |
1567 | || (h->type != STT_GNU_IFUNC | |
1568 | && (SYMBOL_CALLS_LOCAL (info, h) | |
1569 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1570 | && h->root.type == bfd_link_hash_undefweak)))) | |
1571 | ||
1572 | { | |
1573 | /* This case can occur if we saw a PLT32 reloc in an input | |
1574 | file, but the symbol was never referred to by a dynamic | |
1575 | object, or if all references were garbage collected. In | |
1576 | such a case, we don't actually need to build a procedure | |
1577 | linkage table, and we can just do a PC32 reloc instead. */ | |
1578 | h->plt.offset = (bfd_vma) -1; | |
1579 | h->needs_plt = 0; | |
1580 | if (h->got.refcount == 0) | |
1581 | h->got.refcount += 1; | |
1582 | } | |
1583 | else if (h->got.refcount != 0) | |
1584 | { | |
1585 | h->got.refcount -= eh->plt_refcount; | |
1586 | eh->plt_refcount = 0; | |
1587 | } | |
1588 | return TRUE; | |
1589 | } | |
1590 | else | |
1591 | /* It's possible that we incorrectly decided a .plt reloc was | |
1592 | needed for an R_CKCORE_PC32 or similar reloc to a non-function | |
1593 | sym in check_relocs. We can't decide accurately between function | |
1594 | and non-function syms in check_relocs; objects loaded later in | |
1595 | the link may change h->type. So fix it now. */ | |
1596 | h->plt.offset = (bfd_vma) -1; | |
1597 | ||
1598 | /* If this is a weak symbol, and there is a real definition, the | |
1599 | processor independent code will have arranged for us to see the | |
1600 | real definition first, and we can just use the same value. */ | |
1601 | if (h->is_weakalias) | |
1602 | { | |
1603 | struct elf_link_hash_entry *def = weakdef (h); | |
1604 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
1605 | h->root.u.def.section = def->root.u.def.section; | |
1606 | h->root.u.def.value = def->root.u.def.value; | |
1607 | return TRUE; | |
1608 | } | |
1609 | ||
1610 | /* If there are no non-GOT references, we do not need a copy | |
1611 | relocation. */ | |
1612 | if (!h->non_got_ref) | |
1613 | return TRUE; | |
1614 | ||
1615 | /* This is a reference to a symbol defined by a dynamic object which | |
1616 | is not a function. */ | |
1617 | ||
1618 | /* If we are creating a shared library, we must presume that the | |
1619 | only references to the symbol are via the global offset table. | |
1620 | For such cases we need not do anything here; the relocations will | |
1621 | be handled correctly by relocate_section. */ | |
1622 | if (bfd_link_pic (info) || htab->elf.is_relocatable_executable) | |
1623 | return TRUE; | |
1624 | ||
1625 | /* We must allocate the symbol in our .dynbss section, which will | |
1626 | become part of the .bss section of the executable. There will be | |
1627 | an entry for this symbol in the .dynsym section. The dynamic | |
1628 | object will contain position independent code, so all references | |
1629 | from the dynamic object to this symbol will go through the global | |
1630 | offset table. The dynamic linker will use the .dynsym entry to | |
1631 | determine the address it must put in the global offset table, so | |
1632 | both the dynamic object and the regular object will refer to the | |
1633 | same memory location for the variable. */ | |
1634 | /* We must generate a R_CKCORE_COPY reloc to tell the dynamic linker to | |
1635 | copy the initial value out of the dynamic object and into the | |
1636 | runtime process image. We need to remember the offset into the | |
1637 | .rela.bss section we are going to use. */ | |
1638 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) | |
1639 | { | |
1640 | s = htab->elf.sdynrelro; | |
1641 | srel = htab->elf.sreldynrelro; | |
1642 | } | |
1643 | else | |
1644 | { | |
1645 | s = htab->elf.sdynbss; | |
1646 | srel = htab->elf.srelbss; | |
1647 | } | |
1648 | if (info->nocopyreloc == 0 | |
1649 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 | |
1650 | && h->size != 0 | |
1651 | && srel != NULL | |
1652 | && s != NULL) | |
1653 | { | |
1654 | srel->size += sizeof (Elf32_External_Rela); | |
1655 | h->needs_copy = 1; | |
1656 | return _bfd_elf_adjust_dynamic_copy (info, h, s); | |
1657 | } | |
1658 | ||
1659 | h->non_got_ref = 0; | |
1660 | return TRUE; | |
1661 | } | |
1662 | ||
1663 | /* Allocate space in .plt, .got and associated reloc sections for | |
1664 | dynamic relocs. */ | |
1665 | ||
1666 | static bfd_boolean | |
1667 | csky_allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf) | |
1668 | { | |
1669 | struct bfd_link_info *info; | |
1670 | struct csky_elf_link_hash_table *htab; | |
1671 | struct csky_elf_link_hash_entry *eh; | |
1672 | struct elf_dyn_relocs *p; | |
1673 | ||
1674 | /* For indirect case, such as _ZdlPv to _ZdlPv@@GLIBCXX_3.4. */ | |
1675 | if (h->root.type == bfd_link_hash_indirect) | |
1676 | return TRUE; | |
1677 | ||
1678 | if (h->root.type == bfd_link_hash_warning) | |
1679 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1680 | ||
1681 | ||
1682 | info = (struct bfd_link_info *) inf; | |
1683 | htab = csky_elf_hash_table (info); | |
1684 | if (htab == NULL) | |
1685 | return FALSE; | |
1686 | /*TODO: how to deal with weak symbol relocs. */ | |
1687 | if ((htab->elf.dynamic_sections_created || h->type == STT_GNU_IFUNC) | |
1688 | && h->plt.refcount > 0) | |
1689 | { | |
1690 | /* Make sure this symbol is output as a dynamic symbol. | |
1691 | Undefined weak syms won't yet be marked as dynamic. */ | |
1692 | if (h->dynindx == -1 && !h->forced_local | |
1693 | && h->root.type == bfd_link_hash_undefweak | |
1694 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
1695 | return FALSE; | |
1696 | if (bfd_link_pic (info) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
1697 | { | |
1698 | asection *splt = htab->elf.splt; | |
1699 | ||
1700 | /* If this is the first .plt entry, make room for the special | |
1701 | first entry. */ | |
1702 | if (splt->size == 0) | |
1703 | { | |
1704 | if (bfd_csky_abi (info->output_bfd) == CSKY_ABI_V1) | |
1705 | splt->size += PLT_ENTRY_SIZE_P; | |
1706 | else | |
1707 | splt->size += PLT_ENTRY_SIZE; | |
1708 | } | |
1709 | h->plt.offset = splt->size; | |
1710 | ||
1711 | /* If this symbol is not defined in a regular file, and we are | |
1712 | not generating a shared library, then set the symbol to this | |
1713 | location in the .plt. This is required to make function | |
1714 | pointers compare as equal between the normal executable and | |
1715 | the shared library. */ | |
1716 | if (!bfd_link_pic (info) && !h->def_regular) | |
1717 | { | |
1718 | h->root.u.def.section = splt; | |
1719 | h->root.u.def.value = h->plt.offset; | |
1720 | } | |
1721 | ||
1722 | /* Make room for this entry. */ | |
1723 | if (bfd_csky_abi (info->output_bfd) == CSKY_ABI_V1) | |
1724 | splt->size += PLT_ENTRY_SIZE_P; | |
1725 | else | |
1726 | splt->size += PLT_ENTRY_SIZE; | |
1727 | /* We also need to make an entry in the .rela.plt section. */ | |
1728 | htab->elf.srelplt->size += sizeof (Elf32_External_Rela); | |
1729 | ||
1730 | /* We also need to make an entry in the .got.plt section, which | |
1731 | will be placed in the .got section by the linker script. */ | |
1732 | htab->elf.sgotplt->size += 4; | |
1733 | } | |
1734 | else | |
1735 | { | |
1736 | h->plt.offset = (bfd_vma) -1; | |
1737 | h->needs_plt = 0; | |
1738 | } | |
1739 | } | |
1740 | else | |
1741 | { | |
1742 | h->plt.offset = (bfd_vma) -1; | |
1743 | h->needs_plt = 0; | |
1744 | } | |
1745 | ||
1746 | if (h->got.refcount > 0) | |
1747 | { | |
1748 | asection *sgot; | |
1749 | bfd_boolean dyn; | |
1750 | int indx; | |
1751 | ||
1752 | int tls_type = csky_elf_hash_entry (h)->tls_type; | |
1753 | /* Make sure this symbol is output as a dynamic symbol. | |
1754 | Undefined weak syms won't yet be marked as dynamic. */ | |
1755 | if (h->dynindx == -1 && !h->forced_local | |
1756 | && h->root.type == bfd_link_hash_undefweak | |
1757 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
1758 | return FALSE; | |
1759 | ||
1760 | sgot = htab->elf.sgot; | |
1761 | h->got.offset = sgot->size; | |
1762 | BFD_ASSERT (tls_type != GOT_UNKNOWN); | |
1763 | if (tls_type == GOT_NORMAL) | |
1764 | /* Non-TLS symbols need one GOT slot. */ | |
1765 | sgot->size += 4; | |
1766 | else | |
1767 | { | |
1768 | if (tls_type & GOT_TLS_GD) | |
1769 | /* R_CKCORE_TLS_GD32 needs 2 consecutive GOT slots. */ | |
1770 | sgot->size += 8; | |
1771 | if (tls_type & GOT_TLS_IE) | |
1772 | /* R_CKCORE_TLS_IE32 needs one GOT slot. */ | |
1773 | sgot->size += 4; | |
1774 | } | |
1775 | dyn = htab->elf.dynamic_sections_created; | |
1776 | indx = 0; | |
1777 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) | |
1778 | && (! bfd_link_pic (info) || !SYMBOL_REFERENCES_LOCAL (info, h))) | |
1779 | indx = h->dynindx; | |
1780 | ||
1781 | if (tls_type != GOT_NORMAL | |
1782 | && (bfd_link_pic (info) || indx != 0) | |
1783 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1784 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) | |
1785 | || h->root.type != bfd_link_hash_undefweak)) | |
1786 | { | |
1787 | if (tls_type & GOT_TLS_IE) | |
1788 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); | |
1789 | if (tls_type & GOT_TLS_GD) | |
1790 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); | |
1791 | if ((tls_type & GOT_TLS_GD) && indx != 0) | |
1792 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); | |
1793 | } | |
1794 | else if (((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1795 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) | |
1796 | || h->root.type != bfd_link_hash_undefweak) | |
1797 | && (bfd_link_pic (info) | |
1798 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h) | |
1799 | || h->plt.offset == (bfd_vma) -1)) | |
1800 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); | |
1801 | } | |
1802 | else | |
1803 | h->got.offset = (bfd_vma) -1; | |
1804 | ||
1805 | eh = (struct csky_elf_link_hash_entry *) h; | |
1806 | if (eh->dyn_relocs == NULL) | |
1807 | return TRUE; | |
1808 | ||
1809 | /* In the shared -Bsymbolic case, discard space allocated for | |
1810 | dynamic pc-relative relocs against symbols which turn out to be | |
1811 | defined in regular objects. For the normal shared case, discard | |
1812 | space for pc-relative relocs that have become local due to symbol | |
1813 | visibility changes. */ | |
1814 | ||
1815 | if (bfd_link_pic (info)) | |
1816 | { | |
1817 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
1818 | { | |
1819 | struct elf_dyn_relocs **pp; | |
1820 | ||
1821 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1822 | { | |
1823 | p->count -= p->pc_count; | |
1824 | p->pc_count = 0; | |
1825 | if (p->count == 0) | |
1826 | *pp = p->next; | |
1827 | else | |
1828 | pp = &p->next; | |
1829 | } | |
1830 | } | |
1831 | ||
1832 | if (eh->jsri2bsr_refcount | |
1833 | && h->root.type == bfd_link_hash_defined | |
1834 | && eh->dyn_relocs != NULL) | |
1835 | eh->dyn_relocs->count -= eh->jsri2bsr_refcount; | |
1836 | ||
1837 | /* Also discard relocs on undefined weak syms with non-default | |
1838 | visibility. */ | |
1839 | if (eh->dyn_relocs != NULL | |
1840 | && h->root.type == bfd_link_hash_undefweak) | |
1841 | { | |
1842 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1843 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) | |
1844 | eh->dyn_relocs = NULL; | |
1845 | ||
1846 | /* Make sure undefined weak symbols are output as a dynamic | |
1847 | symbol in PIEs. */ | |
1848 | else if (h->dynindx == -1 | |
1849 | && !h->forced_local | |
1850 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
1851 | return FALSE; | |
1852 | } | |
1853 | ||
1854 | } | |
1855 | else | |
1856 | { | |
1857 | /* For the non-shared case, discard space for relocs against | |
1858 | symbols which turn out to need copy relocs or are not | |
1859 | dynamic. */ | |
1860 | ||
1861 | if (!h->non_got_ref | |
1862 | && ((h->def_dynamic && !h->def_regular) | |
1863 | || (htab->elf.dynamic_sections_created | |
1864 | && (h->root.type == bfd_link_hash_undefweak | |
1865 | || h->root.type == bfd_link_hash_indirect | |
1866 | || h->root.type == bfd_link_hash_undefined)))) | |
1867 | { | |
1868 | /* Make sure this symbol is output as a dynamic symbol. | |
1869 | Undefined weak syms won't yet be marked as dynamic. */ | |
1870 | if (h->dynindx == -1 && !h->forced_local | |
1871 | && h->root.type == bfd_link_hash_undefweak) | |
1872 | { | |
1873 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
1874 | return FALSE; | |
1875 | } | |
1876 | ||
1877 | /* If that succeeded, we know we'll be keeping all the | |
1878 | relocs. */ | |
1879 | if (h->dynindx != -1) | |
1880 | goto keep; | |
1881 | } | |
1882 | ||
1883 | eh->dyn_relocs = NULL; | |
1884 | ||
1885 | keep: ; | |
1886 | } | |
1887 | ||
1888 | /* Finally, allocate space. */ | |
1889 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1890 | { | |
1891 | asection *srelgot = htab->elf.srelgot; | |
1892 | srelgot->size += p->count * sizeof (Elf32_External_Rela); | |
1893 | } | |
1894 | ||
1895 | return TRUE; | |
1896 | } | |
1897 | ||
1898 | static asection * | |
1899 | readonly_dynrelocs (struct elf_link_hash_entry *h) | |
1900 | { | |
1901 | struct elf_dyn_relocs *p; | |
1902 | ||
1903 | for (p = csky_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) | |
1904 | { | |
1905 | asection *s = p->sec->output_section; | |
1906 | ||
1907 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1908 | return p->sec; | |
1909 | } | |
1910 | return NULL; | |
1911 | } | |
1912 | ||
1913 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to | |
1914 | read-only sections. */ | |
1915 | ||
1916 | static bfd_boolean | |
1917 | maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p) | |
1918 | { | |
1919 | asection *sec; | |
1920 | ||
1921 | if (h->root.type == bfd_link_hash_indirect) | |
1922 | return TRUE; | |
1923 | ||
1924 | sec = readonly_dynrelocs (h); | |
1925 | if (sec != NULL) | |
1926 | { | |
1927 | struct bfd_link_info *info = (struct bfd_link_info *) info_p; | |
1928 | ||
1929 | info->flags |= DF_TEXTREL; | |
1930 | info->callbacks->minfo | |
1931 | (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"), | |
1932 | sec->owner, h->root.root.string, sec); | |
1933 | ||
1934 | /* Not an error, just cut short the traversal. */ | |
1935 | return FALSE; | |
1936 | } | |
1937 | return TRUE; | |
1938 | } | |
1939 | ||
1940 | /* Set the sizes of the dynamic sections. */ | |
1941 | ||
1942 | static bfd_boolean | |
1943 | csky_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, | |
1944 | struct bfd_link_info *info) | |
1945 | { | |
1946 | struct csky_elf_link_hash_table *htab; | |
1947 | bfd *dynobj; | |
1948 | asection *s; | |
1949 | bfd_boolean relocs; | |
1950 | bfd *ibfd; | |
1951 | ||
1952 | htab = csky_elf_hash_table (info); | |
1953 | if (htab == NULL) | |
1954 | return FALSE; | |
1955 | dynobj = htab->elf.dynobj; | |
1956 | if (dynobj == NULL) | |
1957 | return FALSE; | |
1958 | ||
1959 | if (htab->elf.dynamic_sections_created) | |
1960 | { | |
1961 | /* Set the contents of the .interp section to the interpreter. */ | |
1962 | if (!bfd_link_pic (info) && !info->nointerp) | |
1963 | { | |
1964 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1965 | BFD_ASSERT (s != NULL); | |
1966 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
1967 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1968 | } | |
1969 | } | |
1970 | ||
1971 | /* Set up .got offsets for local syms, and space for local dynamic | |
1972 | relocs. */ | |
1973 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
1974 | { | |
1975 | bfd_signed_vma *local_got_refcounts; | |
1976 | bfd_signed_vma *end_local_got; | |
1977 | bfd_size_type locsymcount; | |
1978 | Elf_Internal_Shdr *symtab_hdr; | |
1979 | asection *srelgot, *sgot; | |
1980 | char *local_tls_type; | |
1981 | ||
1982 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
1983 | continue; | |
1984 | ||
1985 | sgot = htab->elf.sgot; | |
1986 | srelgot = htab->elf.srelgot; | |
1987 | ||
1988 | for (s = ibfd->sections; s != NULL; s = s->next) | |
1989 | { | |
1990 | struct elf_dyn_relocs *p; | |
1991 | ||
1992 | for (p = *((struct elf_dyn_relocs **) | |
1993 | &elf_section_data (s)->local_dynrel); | |
1994 | p != NULL; | |
1995 | p = p->next) | |
1996 | { | |
1997 | if (!bfd_is_abs_section (p->sec) | |
1998 | && bfd_is_abs_section (p->sec->output_section)) | |
1999 | /* Input section has been discarded, either because | |
2000 | it is a copy of a linkonce section or due to | |
2001 | linker script /DISCARD/, so we'll be discarding | |
2002 | the relocs too. */ | |
2003 | ; | |
2004 | else if (p->count != 0) | |
2005 | { | |
2006 | srelgot->size += p->count * sizeof (Elf32_External_Rela); | |
2007 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) | |
2008 | info->flags |= DF_TEXTREL; | |
2009 | } | |
2010 | } | |
2011 | } | |
2012 | ||
2013 | local_got_refcounts = elf_local_got_refcounts (ibfd); | |
2014 | if (!local_got_refcounts) | |
2015 | continue; | |
2016 | ||
2017 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2018 | locsymcount = symtab_hdr->sh_info; | |
2019 | end_local_got = local_got_refcounts + locsymcount; | |
2020 | local_tls_type = csky_elf_local_got_tls_type (ibfd); | |
2021 | ||
2022 | for (; local_got_refcounts < end_local_got; | |
2023 | ++local_got_refcounts, ++local_tls_type) | |
2024 | { | |
2025 | if (*local_got_refcounts > 0) | |
2026 | { | |
2027 | /* GOT_TLS_GD and GOT_TLS_IE type for TLS, GOT_NORMAL type | |
2028 | for GOT. If output file is shared library, we should output | |
2029 | GOT_TLS_GD type relocation in .rel.got. */ | |
2030 | *local_got_refcounts = sgot->size; | |
2031 | if (*local_tls_type & GOT_TLS_GD) | |
2032 | /* TLS_GD relocs need an 8-byte structure in the GOT. */ | |
2033 | sgot->size += 8; | |
2034 | if (*local_tls_type & GOT_TLS_IE) | |
2035 | sgot->size += 4; | |
2036 | if (*local_tls_type == GOT_NORMAL) | |
2037 | sgot->size += 4; | |
2038 | if (bfd_link_pic (info) || *local_tls_type == GOT_TLS_GD) | |
2039 | srelgot->size += sizeof (Elf32_External_Rela); | |
2040 | } | |
2041 | else | |
2042 | *local_got_refcounts = (bfd_vma) -1; | |
2043 | } | |
2044 | } | |
2045 | ||
2046 | if (htab->tls_ldm_got.refcount > 0) | |
2047 | { | |
2048 | /* Allocate two GOT entries and one dynamic relocation (if necessary) | |
2049 | for R_CSKY_TLS_LDM32 relocations. */ | |
2050 | htab->tls_ldm_got.offset = htab->elf.sgot->size; | |
2051 | htab->elf.sgot->size += 8; | |
2052 | if (bfd_link_pic (info)) | |
2053 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); | |
2054 | } | |
2055 | else | |
2056 | htab->tls_ldm_got.offset = -1; | |
2057 | ||
2058 | /* Allocate global sym .plt and .got entries, and space for global | |
2059 | sym dynamic relocs. */ | |
2060 | elf_link_hash_traverse (&htab->elf, csky_allocate_dynrelocs, (PTR) info); | |
2061 | ||
2062 | /* Check for GOT overflow. */ | |
2063 | if (check_got_overflow == 1 | |
2064 | && htab->elf.sgot->size + htab->elf.sgotplt->size > GOT_MAX_SIZE) | |
2065 | { | |
2066 | _bfd_error_handler (_("GOT table size out of range")); /* */ | |
2067 | return FALSE; | |
2068 | } | |
2069 | ||
2070 | /* We now have determined the sizes of the various dynamic sections. | |
2071 | Allocate memory for them. */ | |
2072 | relocs = FALSE; | |
2073 | for (s = dynobj->sections; s != NULL; s = s->next) | |
2074 | { | |
2075 | bfd_boolean strip_section = TRUE; | |
2076 | ||
2077 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2078 | continue; | |
2079 | ||
2080 | if (s == htab->elf.splt | |
2081 | || s == htab->elf.sgot | |
2082 | || s == htab->elf.sgotplt | |
2083 | || s == htab->elf.sdynrelro | |
2084 | || s == htab->elf.sreldynrelro) | |
2085 | { | |
2086 | /* Strip this section if we don't need it; | |
2087 | see the comment below. */ | |
2088 | /* We'd like to strip these sections if they aren't needed, but if | |
2089 | we've exported dynamic symbols from them we must leave them. | |
2090 | It's too late to tell BFD to get rid of the symbols. */ | |
2091 | ||
2092 | if (htab->elf.hplt != NULL) | |
2093 | strip_section = FALSE; | |
2094 | } | |
2095 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel") ) | |
2096 | { | |
2097 | if (s->size != 0 ) | |
2098 | relocs = TRUE; | |
2099 | ||
2100 | /* We use the reloc_count field as a counter if we need | |
2101 | to copy relocs into the output file. */ | |
2102 | s->reloc_count = 0; | |
2103 | } | |
2104 | else | |
2105 | /* It's not one of our sections, so don't allocate space. */ | |
2106 | continue; | |
2107 | ||
2108 | /* Strip this section if we don't need it; see the | |
2109 | comment below. */ | |
2110 | if (s->size == 0) | |
2111 | { | |
2112 | /* If we don't need this section, strip it from the | |
2113 | output file. This is mostly to handle .rel.bss and | |
2114 | .rel.plt. We must create both sections in | |
2115 | create_dynamic_sections, because they must be created | |
2116 | before the linker maps input sections to output | |
2117 | sections. The linker does that before | |
2118 | adjust_dynamic_symbol is called, and it is that | |
2119 | function which decides whether anything needs to go | |
2120 | into these sections. */ | |
2121 | if (strip_section) | |
2122 | s->flags |= SEC_EXCLUDE; | |
2123 | continue; | |
2124 | } | |
2125 | ||
2126 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
2127 | continue; | |
2128 | ||
2129 | /* Allocate memory for the section contents. We use bfd_zalloc | |
2130 | here in case unused entries are not reclaimed before the | |
2131 | section's contents are written out. This should not happen, | |
2132 | but this way if it does, we get a R_CKCORE_NONE reloc instead | |
2133 | of garbage. */ | |
2134 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
2135 | if (s->contents == NULL) | |
2136 | return FALSE; | |
2137 | } | |
2138 | ||
2139 | if (htab->elf.dynamic_sections_created) | |
2140 | { | |
2141 | /* Add some entries to the .dynamic section. We fill in the | |
2142 | values later, in csky_elf_finish_dynamic_sections, but we | |
2143 | must add the entries now so that we get the correct size for | |
2144 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2145 | dynamic linker and used by the debugger. */ | |
2146 | #define add_dynamic_entry(TAG, VAL) \ | |
2147 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
2148 | ||
2149 | if (bfd_link_executable (info) && !add_dynamic_entry (DT_DEBUG, 0)) | |
2150 | return FALSE; | |
2151 | ||
2152 | if (htab->elf.sgot->size != 0 || htab->elf.splt->size) | |
2153 | { | |
2154 | if (!add_dynamic_entry (DT_PLTGOT, 0) | |
2155 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2156 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2157 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
2158 | return FALSE; | |
2159 | } | |
2160 | ||
2161 | if (relocs) | |
2162 | { | |
2163 | if (!add_dynamic_entry (DT_RELA, 0) | |
2164 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2165 | || !add_dynamic_entry (DT_RELAENT, | |
2166 | sizeof (Elf32_External_Rela))) | |
2167 | return FALSE; | |
2168 | ||
2169 | /* If any dynamic relocs apply to a read-only section, | |
2170 | then we need a DT_TEXTREL entry. */ | |
2171 | if ((info->flags & DF_TEXTREL) == 0) | |
2172 | elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); | |
2173 | ||
2174 | if ((info->flags & DF_TEXTREL) != 0 | |
2175 | && !add_dynamic_entry (DT_TEXTREL, 0)) | |
2176 | return FALSE; | |
2177 | } | |
2178 | } | |
2179 | #undef add_dynamic_entry | |
2180 | ||
2181 | return TRUE; | |
2182 | } | |
2183 | ||
2184 | /* Finish up dynamic symbol handling. We set the contents of various | |
2185 | dynamic sections here. */ | |
2186 | ||
2187 | static bfd_boolean | |
2188 | csky_elf_finish_dynamic_symbol (bfd *output_bfd, | |
2189 | struct bfd_link_info *info, | |
2190 | struct elf_link_hash_entry *h, | |
2191 | Elf_Internal_Sym *sym) | |
2192 | { | |
2193 | struct csky_elf_link_hash_table *htab; | |
2194 | ||
2195 | htab = csky_elf_hash_table (info); | |
2196 | if (htab == NULL) | |
2197 | return FALSE; | |
2198 | ||
2199 | /* Sanity check to make sure no unexpected symbol reaches here. | |
2200 | This matches the test in csky_elf_relocate_section handling | |
2201 | of GOT/PLT entries. */ | |
2202 | BFD_ASSERT (! (h->dynindx == -1 | |
2203 | && !h->forced_local | |
2204 | && h->root.type != bfd_link_hash_undefweak | |
2205 | && bfd_link_pic (info))); | |
2206 | ||
2207 | if (h->plt.offset != (bfd_vma) -1) | |
2208 | { | |
2209 | bfd_vma plt_index; | |
2210 | bfd_vma got_offset; | |
2211 | Elf_Internal_Rela rel; | |
2212 | bfd_byte *loc; | |
2213 | asection *plt, *relplt, *gotplt; | |
2214 | ||
2215 | plt = htab->elf.splt; | |
2216 | relplt = htab->elf.srelplt; | |
2217 | gotplt = htab->elf.sgotplt; | |
2218 | ||
2219 | /* This symbol has an entry in the procedure linkage table. Set | |
2220 | it up. */ | |
2221 | BFD_ASSERT (h->dynindx != -1 | |
2222 | || ((h->forced_local || bfd_link_executable (info)) | |
2223 | && h->def_regular)); | |
2224 | BFD_ASSERT (plt != NULL && gotplt != NULL && relplt != NULL); | |
2225 | if (bfd_csky_abi (output_bfd) == CSKY_ABI_V2) | |
2226 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2227 | else | |
2228 | plt_index = h->plt.offset / PLT_ENTRY_SIZE_P - 1; | |
2229 | got_offset = (plt_index + 3) * 4; | |
2230 | ||
2231 | /* Fill in the entry in the procedure linkage table. */ | |
2232 | if (bfd_csky_abi (output_bfd) == CSKY_ABI_V2) | |
2233 | { | |
2234 | csky_put_insn_32 (output_bfd, csky_elf_plt_entry_v2[0], | |
2235 | plt->contents + h->plt.offset); | |
2236 | csky_put_insn_32 (output_bfd, | |
2237 | (csky_elf_plt_entry_v2[1] | plt_index), | |
2238 | plt->contents + h->plt.offset + 4); | |
2239 | csky_put_insn_32 (output_bfd, csky_elf_plt_entry_v2[2], | |
2240 | plt->contents + h->plt.offset + 8); | |
2241 | } | |
2242 | else | |
2243 | { | |
2244 | int i; | |
2245 | for (i = 0; i < 6; i++) | |
2246 | bfd_put_16 (output_bfd, csky_elf_plt_entry_v1[i], | |
2247 | plt->contents + h->plt.offset + i * 2); | |
2248 | bfd_put_32 (output_bfd, plt_index, | |
2249 | plt->contents + h->plt.offset + i * 2); | |
2250 | } | |
2251 | ||
2252 | /* Fill in the entry in the .rel.plt section. */ | |
2253 | rel.r_offset = (htab->elf.sgotplt->output_section->vma | |
2254 | + htab->elf.sgotplt->output_offset | |
2255 | + got_offset); | |
2256 | rel.r_info = ELF32_R_INFO (h->dynindx, R_CKCORE_JUMP_SLOT); | |
2257 | rel.r_addend = (plt->output_section->vma | |
2258 | + plt->output_offset | |
2259 | + h->plt.offset); | |
2260 | loc = (htab->elf.srelplt->contents | |
2261 | + plt_index * sizeof (Elf32_External_Rela)); | |
2262 | ||
2263 | if (loc != NULL) | |
2264 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
2265 | if (! h->def_regular) | |
2266 | { | |
2267 | /* Mark the symbol as undefined, rather than as defined in | |
2268 | the .plt section. Leave the value alone. */ | |
2269 | sym->st_shndx = SHN_UNDEF; | |
2270 | /* If the symbol is weak, we do need to clear the value. | |
2271 | Otherwise, the PLT entry would provide a definition for | |
2272 | the symbol even if the symbol wasn't defined anywhere, | |
2273 | and so the symbol would never be NULL. Leave the value if | |
2274 | there were any relocations where pointer equality matters | |
2275 | (this is a clue for the dynamic linker, to make function | |
2276 | pointer comparisons work between an application and shared | |
2277 | library). */ | |
2278 | if (!h->ref_regular_nonweak || !h->pointer_equality_needed) | |
2279 | sym->st_value = 0; | |
2280 | } | |
2281 | } | |
2282 | ||
2283 | /* Fill in the entry in the .got section. */ | |
2284 | if (h->got.offset != (bfd_vma) -1 | |
2285 | && ((csky_elf_hash_entry (h)->tls_type & GOT_TLS_GD) == 0) | |
2286 | && ((csky_elf_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)) | |
2287 | { | |
2288 | Elf_Internal_Rela rel; | |
2289 | bfd_byte *loc; | |
2290 | ||
2291 | /* This symbol has an entry in the global offset table. | |
2292 | Set it up. */ | |
2293 | BFD_ASSERT (htab->elf.sgot != NULL && htab->elf.srelgot != NULL); | |
2294 | ||
2295 | rel.r_offset = (htab->elf.sgot->output_section->vma | |
2296 | + htab->elf.sgot->output_offset | |
2297 | + (h->got.offset & ~(bfd_vma) 1)); | |
2298 | ||
2299 | /* If this is a static link, or it is a -Bsymbolic link and the | |
2300 | symbol is defined locally or was forced to be local because | |
2301 | of a version file, we just want to emit a RELATIVE reloc. | |
2302 | The entry in the global offset table will already have been | |
2303 | initialized in the relocate_section function. */ | |
2304 | if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h)) | |
2305 | { | |
2306 | BFD_ASSERT ((h->got.offset & 1) != 0); | |
2307 | rel.r_info = ELF32_R_INFO (0, R_CKCORE_RELATIVE); | |
2308 | rel.r_addend = (h->root.u.def.value | |
2309 | + h->root.u.def.section->output_offset | |
2310 | + h->root.u.def.section->output_section->vma); | |
2311 | } | |
2312 | else | |
2313 | { | |
2314 | BFD_ASSERT ((h->got.offset & 1) == 0); | |
2315 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
2316 | htab->elf.sgot->contents + h->got.offset); | |
2317 | rel.r_info = ELF32_R_INFO (h->dynindx, R_CKCORE_GLOB_DAT); | |
2318 | rel.r_addend = 0; | |
2319 | } | |
2320 | ||
2321 | loc = htab->elf.srelgot->contents; | |
2322 | loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
2323 | ||
2324 | if (loc != NULL) | |
2325 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
2326 | } | |
2327 | ||
2328 | if (h->needs_copy) | |
2329 | { | |
2330 | asection *s; | |
2331 | Elf_Internal_Rela rela; | |
2332 | bfd_byte *loc; | |
2333 | ||
2334 | /* This symbol needs a copy reloc. Set it up. */ | |
2335 | BFD_ASSERT (h->dynindx != -1 | |
2336 | && (h->root.type == bfd_link_hash_defined | |
2337 | || h->root.type == bfd_link_hash_defweak)); | |
2338 | ||
2339 | rela.r_offset = (h->root.u.def.value | |
2340 | + h->root.u.def.section->output_section->vma | |
2341 | + h->root.u.def.section->output_offset); | |
2342 | rela.r_info = ELF32_R_INFO (h->dynindx, R_CKCORE_COPY); | |
2343 | rela.r_addend = 0; | |
2344 | if (h->root.u.def.section == htab->elf.sdynrelro) | |
2345 | s = htab->elf.sreldynrelro; | |
2346 | else | |
2347 | s = htab->elf.srelbss; | |
2348 | BFD_ASSERT (s != NULL); | |
2349 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); | |
2350 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
2351 | } | |
2352 | ||
2353 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2354 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2355 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2356 | sym->st_shndx = SHN_ABS; | |
2357 | ||
2358 | return TRUE; | |
2359 | } | |
2360 | ||
2361 | /* Finish up the dynamic sections. */ | |
2362 | ||
2363 | static bfd_boolean | |
2364 | csky_elf_finish_dynamic_sections (bfd *output_bfd, | |
2365 | struct bfd_link_info *info) | |
2366 | { | |
2367 | struct csky_elf_link_hash_table *htab; | |
2368 | bfd *dynobj; | |
2369 | asection *sdyn; | |
2370 | asection *got_sec; | |
2371 | ||
2372 | htab = csky_elf_hash_table (info); | |
2373 | if (htab == NULL) | |
2374 | return FALSE; | |
2375 | ||
2376 | dynobj = htab->elf.dynobj; | |
2377 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2378 | ||
2379 | if (htab->elf.dynamic_sections_created) | |
2380 | { | |
2381 | Elf32_External_Dyn *dyncon, *dynconend; | |
2382 | ||
2383 | BFD_ASSERT (sdyn != NULL && htab->elf.sgot != NULL); | |
2384 | ||
2385 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
2386 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); | |
2387 | for (; dyncon < dynconend; dyncon++) | |
2388 | { | |
2389 | Elf_Internal_Dyn dyn; | |
2390 | bfd_boolean size = FALSE; | |
2391 | const char *name = NULL; | |
2392 | ||
2393 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
2394 | switch (dyn.d_tag) | |
2395 | { | |
2396 | default: | |
2397 | continue; | |
2398 | case DT_RELA: | |
2399 | name = ".rela.dyn"; | |
2400 | size = FALSE; | |
2401 | break; | |
2402 | case DT_RELASZ: | |
2403 | name = ".rela.dyn"; | |
2404 | size = TRUE; | |
2405 | break; | |
2406 | case DT_PLTRELSZ: | |
2407 | name = ".rela.plt"; | |
2408 | size = TRUE; | |
2409 | break; | |
2410 | case DT_PLTGOT: | |
2411 | dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma; | |
2412 | break; | |
2413 | case DT_JMPREL: | |
2414 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma | |
2415 | + htab->elf.srelplt->output_offset; | |
2416 | break; | |
2417 | } | |
2418 | ||
2419 | if (name != NULL) | |
2420 | { | |
2421 | asection *s = bfd_get_section_by_name (output_bfd, name); | |
2422 | ||
2423 | if (s == NULL) | |
2424 | dyn.d_un.d_val = 0; | |
2425 | else if (!size) | |
2426 | dyn.d_un.d_ptr = s->vma; | |
2427 | else | |
2428 | dyn.d_un.d_val = s->size; | |
2429 | } | |
2430 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2431 | } | |
2432 | } | |
2433 | ||
2434 | /* Fill in the first three entries in the global offset table. */ | |
2435 | if (htab->elf.sgotplt) | |
2436 | got_sec = htab->elf.sgotplt; | |
2437 | else | |
2438 | got_sec = htab->elf.sgot; | |
2439 | if (got_sec != NULL) | |
2440 | { | |
2441 | if (got_sec->size > 0) | |
2442 | { | |
2443 | bfd_put_32 (output_bfd, | |
2444 | (sdyn == NULL ? (bfd_vma) 0 | |
2445 | : sdyn->output_section->vma + sdyn->output_offset), | |
2446 | got_sec->contents); | |
2447 | bfd_put_32 (output_bfd, (bfd_vma) 0, got_sec->contents + 4); | |
2448 | bfd_put_32 (output_bfd, (bfd_vma) 0, got_sec->contents + 8); | |
2449 | } | |
2450 | elf_section_data (got_sec->output_section)->this_hdr.sh_entsize = 4; | |
2451 | } | |
2452 | return TRUE; | |
2453 | } | |
2454 | ||
2455 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
2456 | ||
2457 | static void | |
2458 | csky_elf_copy_indirect_symbol (struct bfd_link_info *info, | |
2459 | struct elf_link_hash_entry *dir, | |
2460 | struct elf_link_hash_entry *ind) | |
2461 | { | |
2462 | struct csky_elf_link_hash_entry *edir, *eind; | |
2463 | ||
2464 | edir = (struct csky_elf_link_hash_entry *) dir; | |
2465 | eind = (struct csky_elf_link_hash_entry *) ind; | |
2466 | ||
2467 | if (eind->dyn_relocs != NULL) | |
2468 | { | |
2469 | if (edir->dyn_relocs != NULL) | |
2470 | { | |
2471 | struct elf_dyn_relocs **pp; | |
2472 | struct elf_dyn_relocs *p; | |
2473 | ||
2474 | /* Add reloc counts against the indirect sym to the direct sym | |
2475 | list. Merge any entries against the same section. */ | |
2476 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
2477 | { | |
2478 | struct elf_dyn_relocs *q; | |
2479 | ||
2480 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
2481 | if (q->sec == p->sec) | |
2482 | { | |
2483 | q->pc_count += p->pc_count; | |
2484 | q->count += p->count; | |
2485 | *pp = p->next; | |
2486 | break; | |
2487 | } | |
2488 | if (q == NULL) | |
2489 | pp = &p->next; | |
2490 | } | |
2491 | *pp = edir->dyn_relocs; | |
2492 | } | |
2493 | edir->dyn_relocs = eind->dyn_relocs; | |
2494 | eind->dyn_relocs = NULL; | |
2495 | } | |
2496 | if (ind->root.type == bfd_link_hash_indirect | |
2497 | && dir->got.refcount <= 0) | |
2498 | { | |
2499 | edir->tls_type = eind->tls_type; | |
2500 | eind->tls_type = GOT_UNKNOWN; | |
2501 | } | |
2502 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
2503 | } | |
2504 | ||
2505 | /* Used to decide how to sort relocs in an optimal manner for the | |
2506 | dynamic linker, before writing them out. */ | |
2507 | ||
2508 | static enum elf_reloc_type_class | |
2509 | csky_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
2510 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
2511 | const Elf_Internal_Rela *rela) | |
2512 | { | |
2513 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
2514 | { | |
2515 | case R_CKCORE_RELATIVE: | |
2516 | return reloc_class_relative; | |
2517 | case R_CKCORE_JUMP_SLOT: | |
2518 | return reloc_class_plt; | |
2519 | case R_CKCORE_COPY: | |
2520 | return reloc_class_copy; | |
2521 | case R_CKCORE_IRELATIVE: | |
2522 | return reloc_class_ifunc; | |
2523 | default: | |
2524 | return reloc_class_normal; | |
2525 | } | |
2526 | } | |
2527 | ||
2528 | /* Return the section that should be marked against GC for a given | |
2529 | relocation. */ | |
2530 | ||
2531 | static asection * | |
2532 | csky_elf_gc_mark_hook (asection *sec, | |
2533 | struct bfd_link_info *info, | |
2534 | Elf_Internal_Rela *rel, | |
2535 | struct elf_link_hash_entry *h, | |
2536 | Elf_Internal_Sym *sym) | |
2537 | { | |
2538 | if (h != NULL) | |
2539 | { | |
2540 | switch (ELF32_R_TYPE (rel->r_info)) | |
2541 | { | |
2542 | case R_CKCORE_GNU_VTINHERIT: | |
2543 | case R_CKCORE_GNU_VTENTRY: | |
2544 | return NULL; | |
2545 | } | |
2546 | } | |
2547 | ||
2548 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
2549 | } | |
2550 | ||
2551 | /* Look through the relocs for a section during the first phase. | |
2552 | Since we don't do .gots or .plts, we just need to consider the | |
2553 | virtual table relocs for gc. */ | |
2554 | ||
2555 | static bfd_boolean | |
2556 | csky_elf_check_relocs (bfd * abfd, | |
2557 | struct bfd_link_info * info, | |
2558 | asection * sec, | |
2559 | const Elf_Internal_Rela * relocs) | |
2560 | { | |
2561 | Elf_Internal_Shdr * symtab_hdr; | |
2562 | struct elf_link_hash_entry ** sym_hashes; | |
2563 | const Elf_Internal_Rela * rel; | |
2564 | const Elf_Internal_Rela * rel_end; | |
2565 | struct csky_elf_link_hash_table *htab; | |
2566 | asection *sreloc; | |
2567 | ||
2568 | /* if output type is relocatable, return. */ | |
2569 | if (bfd_link_relocatable (info)) | |
2570 | return TRUE; | |
2571 | ||
2572 | htab = csky_elf_hash_table (info); | |
2573 | if (htab == NULL) | |
2574 | return FALSE; | |
2575 | ||
2576 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; | |
2577 | sym_hashes = elf_sym_hashes (abfd); | |
2578 | ||
2579 | rel_end = relocs + sec->reloc_count; | |
2580 | sreloc = NULL; | |
2581 | for (rel = relocs; rel < rel_end; rel++) | |
2582 | { | |
2583 | struct elf_link_hash_entry *h; | |
2584 | unsigned long r_symndx; | |
2585 | Elf_Internal_Sym *isym; | |
2586 | int r_type; | |
2587 | ||
2588 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2589 | r_type = ELF32_R_TYPE (rel->r_info); | |
2590 | if (r_symndx < symtab_hdr->sh_info) | |
2591 | { | |
2592 | /* A local symbol. */ | |
2593 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2594 | abfd, r_symndx); | |
2595 | if (isym == NULL) | |
2596 | return FALSE; | |
2597 | h = NULL; | |
2598 | } | |
2599 | else | |
2600 | { | |
2601 | isym = NULL; | |
2602 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2603 | while (h->root.type == bfd_link_hash_indirect | |
2604 | || h->root.type == bfd_link_hash_warning) | |
2605 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2606 | } | |
2607 | ||
2608 | switch (r_type) | |
2609 | { | |
2610 | case R_CKCORE_PCREL_IMM26BY2: | |
2611 | case R_CKCORE_PCREL_IMM11BY2: | |
2612 | case R_CKCORE_PCREL_JSR_IMM11BY2: | |
2613 | case R_CKCORE_PCREL_JSR_IMM26BY2: | |
2614 | /* If the symbol is '*UND*', means this reloc is used for | |
2615 | * callgraph, don't need to leave to shared object. */ | |
2616 | if (r_symndx == 0) | |
2617 | break; | |
2618 | /* Else fall through. */ | |
2619 | case R_CKCORE_ADDR32: | |
2620 | case R_CKCORE_ADDR_HI16: | |
2621 | case R_CKCORE_ADDR_LO16: | |
2622 | if (h != NULL | |
2623 | && bfd_link_executable (info) | |
2624 | && r_type == R_CKCORE_ADDR32 | |
2625 | && h->type == STT_OBJECT | |
2626 | && (sec->flags & SEC_ALLOC) != 0 | |
2627 | && (sec->flags & SEC_READONLY)) | |
2628 | /* If this reloc is in a read-only section, we might | |
2629 | need a copy reloc. We can't check reliably at this | |
2630 | stage whether the section is read-only, as input | |
2631 | sections have not yet been mapped to output sections. | |
2632 | Tentatively set the flag for now, and correct in | |
2633 | adjust_dynamic_symbol. */ | |
2634 | h->non_got_ref = 1; | |
2635 | ||
2636 | /* If we are creating a shared library or relocatable executable, | |
2637 | and this is a reloc against a global symbol, then we need to | |
2638 | copy the reloc into the shared library. However, if we are | |
2639 | linking with -Bsymbolic, we do not need to copy a reloc | |
2640 | against a global symbol which is defined in an object we are | |
2641 | including in the link (i.e., DEF_REGULAR is set). At | |
2642 | this point we have not seen all the input files, so it is | |
2643 | possible that DEF_REGULAR is not set now but will be set | |
2644 | later (it is never cleared). We account for that possibility | |
2645 | below by storing information in the relocs_copied field of | |
2646 | the hash table entry. */ | |
2647 | if ((bfd_link_pic (info) && (sec->flags & SEC_ALLOC) != 0) | |
2648 | || (!bfd_link_pic (info) | |
2649 | && (sec->flags & SEC_ALLOC) != 0 | |
2650 | && h != NULL | |
2651 | && (h->root.type == bfd_link_hash_defweak | |
2652 | || !h->def_regular))) | |
2653 | { | |
2654 | struct elf_dyn_relocs *p; | |
2655 | struct elf_dyn_relocs **head; | |
2656 | /* We must copy these reloc types into the output file. | |
2657 | Create a reloc section in dynobj and make room for | |
2658 | this reloc. */ | |
2659 | if (sreloc == NULL) | |
2660 | { | |
2661 | if (htab->elf.dynobj == NULL) | |
2662 | htab->elf.dynobj = abfd; | |
2663 | ||
2664 | sreloc = _bfd_elf_make_dynamic_reloc_section | |
2665 | (sec, htab->elf.dynobj, 2, abfd, TRUE); | |
2666 | ||
2667 | if (sreloc == NULL) | |
2668 | return FALSE; | |
2669 | } | |
2670 | ||
2671 | if (h == NULL && !use_branch_stub | |
2672 | && ((ELF32_R_TYPE (rel->r_info) | |
2673 | == R_CKCORE_PCREL_IMM26BY2) | |
2674 | || (ELF32_R_TYPE (rel->r_info) | |
2675 | == R_CKCORE_PCREL_IMM11BY2))) | |
2676 | break; | |
2677 | ||
2678 | /* If this is a global symbol, we count the number of | |
2679 | relocations we need for this symbol. */ | |
2680 | if (h != NULL) | |
2681 | { | |
2682 | struct csky_elf_link_hash_entry *eh; | |
2683 | eh = (struct csky_elf_link_hash_entry *)h; | |
2684 | if ((ELF32_R_TYPE (rel->r_info) | |
2685 | == R_CKCORE_PCREL_JSR_IMM26BY2) | |
2686 | || (ELF32_R_TYPE (rel->r_info) | |
2687 | == R_CKCORE_PCREL_JSR_IMM11BY2)) | |
2688 | eh->jsri2bsr_refcount += 1; | |
2689 | head = &eh->dyn_relocs; | |
2690 | } | |
2691 | else | |
2692 | { | |
2693 | /* Track dynamic relocs needed for local syms too. | |
2694 | We really need local syms available to do this | |
2695 | easily. Oh well. */ | |
2696 | void **vpp; | |
2697 | asection *s; | |
2698 | Elf_Internal_Sym *loc_isym; | |
2699 | ||
2700 | loc_isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2701 | abfd, r_symndx); | |
2702 | if (loc_isym == NULL) | |
2703 | return FALSE; | |
2704 | s = bfd_section_from_elf_index (abfd, loc_isym->st_shndx); | |
2705 | if (s == NULL) | |
2706 | s = sec; | |
2707 | vpp = &elf_section_data (s)->local_dynrel; | |
2708 | head = (struct elf_dyn_relocs **)vpp; | |
2709 | } | |
2710 | ||
2711 | p = *head; | |
2712 | if (p == NULL || p->sec != sec) | |
2713 | { | |
2714 | bfd_size_type amt = sizeof *p; | |
2715 | p = ((struct elf_dyn_relocs *) | |
2716 | bfd_alloc (htab->elf.dynobj, amt)); | |
2717 | if (p == NULL) | |
2718 | return FALSE; | |
2719 | p->next = *head; | |
2720 | *head = p; | |
2721 | p->sec = sec; | |
2722 | p->count = 0; | |
2723 | p->pc_count = 0; | |
2724 | } | |
2725 | ||
2726 | if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_PCREL_IMM26BY2 | |
2727 | || ELF32_R_TYPE (rel->r_info) == R_CKCORE_PCREL_IMM11BY2) | |
2728 | p->pc_count += 1; | |
2729 | p->count += 1; | |
2730 | } | |
2731 | break; | |
2732 | ||
2733 | case R_CKCORE_PLT_IMM18BY4: | |
2734 | case R_CKCORE_PLT32: | |
2735 | /* This symbol requires a procedure linkage table entry. We | |
2736 | actually build the entry in adjust_dynamic_symbol, | |
2737 | because this might be a case of linking PIC code which is | |
2738 | never referenced by a dynamic object, in which case we | |
2739 | don't need to generate a procedure linkage table entry | |
2740 | after all. */ | |
2741 | ||
2742 | /* If this is a local symbol, we resolve it directly without | |
2743 | creating a procedure linkage table entry. */ | |
2744 | if (h == NULL) | |
2745 | continue; | |
2746 | if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_PLT_IMM18BY4) | |
2747 | check_got_overflow = 1; | |
2748 | ||
2749 | h->needs_plt = 1; | |
2750 | h->plt.refcount += 1; | |
2751 | h->got.refcount += 1; | |
2752 | ((struct csky_elf_link_hash_entry *)h)->plt_refcount += 1; | |
2753 | break; | |
2754 | ||
2755 | case R_CKCORE_GOT12: | |
2756 | case R_CKCORE_PLT12: | |
2757 | case R_CKCORE_GOT32: | |
2758 | case R_CKCORE_GOT_HI16: | |
2759 | case R_CKCORE_GOT_LO16: | |
2760 | case R_CKCORE_PLT_HI16: | |
2761 | case R_CKCORE_PLT_LO16: | |
2762 | case R_CKCORE_GOT_IMM18BY4: | |
2763 | case R_CKCORE_TLS_IE32: | |
2764 | case R_CKCORE_TLS_GD32: | |
2765 | { | |
2766 | int tls_type, old_tls_type; | |
2767 | ||
2768 | if (h != NULL | |
2769 | && bfd_link_executable (info) | |
2770 | && r_type == R_CKCORE_GOT_IMM18BY4 | |
2771 | && (sec->flags & SEC_ALLOC) != 0 | |
2772 | && (sec->flags & SEC_READONLY)) | |
2773 | /* If this reloc is in a read-only section, we might | |
2774 | need a copy reloc. We can't check reliably at this | |
2775 | stage whether the section is read-only, as input | |
2776 | sections have not yet been mapped to output sections. | |
2777 | Tentatively set the flag for now, and correct in | |
2778 | adjust_dynamic_symbol. */ | |
2779 | h->non_got_ref = 1; | |
2780 | ||
2781 | switch (ELF32_R_TYPE (rel->r_info)) | |
2782 | { | |
2783 | case R_CKCORE_TLS_IE32: | |
2784 | tls_type = GOT_TLS_IE; | |
2785 | break; | |
2786 | case R_CKCORE_TLS_GD32: | |
2787 | tls_type = GOT_TLS_GD; | |
2788 | break; | |
2789 | default: | |
2790 | tls_type = GOT_NORMAL; | |
2791 | break; | |
2792 | } | |
2793 | if (h != NULL) | |
2794 | { | |
2795 | if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_GOT_IMM18BY4) | |
2796 | check_got_overflow = 1; | |
2797 | h->got.refcount += 1; | |
2798 | old_tls_type = csky_elf_hash_entry (h)->tls_type; | |
2799 | } | |
2800 | else | |
2801 | { | |
2802 | bfd_signed_vma *local_got_refcounts; | |
2803 | ||
2804 | /* This is a global offset table entry for a local symbol. */ | |
2805 | /* we can write a new function named | |
2806 | elf32_csky_allocate_local_sym_info() to replace | |
2807 | following code. */ | |
2808 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2809 | if (local_got_refcounts == NULL) | |
2810 | { | |
2811 | bfd_size_type size; | |
2812 | ||
2813 | size = symtab_hdr->sh_info; | |
2814 | size *= (sizeof (bfd_signed_vma) + sizeof (char)); | |
2815 | local_got_refcounts = ((bfd_signed_vma *) | |
2816 | bfd_zalloc (abfd, size)); | |
2817 | if (local_got_refcounts == NULL) | |
2818 | return FALSE; | |
2819 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
2820 | csky_elf_local_got_tls_type (abfd) | |
2821 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
2822 | } | |
2823 | local_got_refcounts[r_symndx] += 1; | |
2824 | old_tls_type = csky_elf_local_got_tls_type (abfd)[r_symndx]; | |
2825 | } | |
2826 | ||
2827 | /* We will already have issued an error message if there is a | |
2828 | TLS / non-TLS mismatch, based on the symbol type. We don't | |
2829 | support any linker relaxations. So just combine any TLS | |
2830 | types needed. */ | |
2831 | if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL | |
2832 | && tls_type != GOT_NORMAL) | |
2833 | tls_type |= old_tls_type; | |
2834 | ||
2835 | if (old_tls_type != tls_type) | |
2836 | { | |
2837 | if (h != NULL) | |
2838 | csky_elf_hash_entry (h)->tls_type = tls_type; | |
2839 | else | |
2840 | csky_elf_local_got_tls_type (abfd)[r_symndx] = tls_type; | |
2841 | } | |
2842 | } | |
2843 | /* Fall through. */ | |
2844 | ||
2845 | case R_CKCORE_TLS_LDM32: | |
2846 | if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_TLS_LDM32) | |
2847 | htab->tls_ldm_got.refcount++; | |
2848 | /* Fall through. */ | |
2849 | ||
2850 | case R_CKCORE_GOTOFF: | |
2851 | case R_CKCORE_GOTPC: | |
2852 | case R_CKCORE_GOTOFF_HI16: | |
2853 | case R_CKCORE_GOTOFF_LO16: | |
2854 | case R_CKCORE_GOTPC_HI16: | |
2855 | case R_CKCORE_GOTPC_LO16: | |
2856 | case R_CKCORE_GOTOFF_IMM18: | |
2857 | if (htab->elf.sgot == NULL) | |
2858 | { | |
2859 | if (htab->elf.dynobj == NULL) | |
2860 | htab->elf.dynobj = abfd; | |
2861 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) | |
2862 | return FALSE; | |
2863 | } | |
2864 | break; | |
2865 | ||
2866 | /* This relocation describes the C++ object vtable hierarchy. | |
2867 | Reconstruct it for later use during GC. */ | |
2868 | case R_CKCORE_GNU_VTINHERIT: | |
2869 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
2870 | return FALSE; | |
2871 | break; | |
2872 | ||
2873 | /* This relocation describes which C++ vtable entries are actually | |
2874 | used. Record for later use during GC. */ | |
2875 | case R_CKCORE_GNU_VTENTRY: | |
2876 | BFD_ASSERT (h != NULL); | |
2877 | if (h != NULL | |
2878 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
2879 | return FALSE; | |
2880 | break; | |
2881 | } | |
2882 | } | |
2883 | ||
2884 | return TRUE; | |
2885 | } | |
2886 | ||
2887 | static const struct bfd_elf_special_section csky_elf_special_sections[]= | |
2888 | { | |
2889 | { STRING_COMMA_LEN (".ctors"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
2890 | { STRING_COMMA_LEN (".dtors"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
2891 | { NULL, 0, 0, 0, 0 } | |
2892 | }; | |
2893 | ||
2894 | /* Function to keep CSKY specific flags in the ELF header. */ | |
2895 | ||
2896 | static bfd_boolean | |
2897 | csky_elf_set_private_flags (bfd * abfd, flagword flags) | |
2898 | { | |
2899 | BFD_ASSERT (! elf_flags_init (abfd) | |
2900 | || elf_elfheader (abfd)->e_flags == flags); | |
2901 | ||
2902 | elf_elfheader (abfd)->e_flags = flags; | |
2903 | elf_flags_init (abfd) = TRUE; | |
2904 | return TRUE; | |
2905 | } | |
2906 | ||
2907 | static csky_arch_for_merge * | |
2908 | csky_find_arch_with_eflag (const unsigned long arch_eflag) | |
2909 | { | |
2910 | csky_arch_for_merge *csky_arch = NULL; | |
2911 | ||
2912 | for (csky_arch = csky_archs; csky_arch->name != NULL; csky_arch++) | |
2913 | if (csky_arch->arch_eflag == arch_eflag) | |
2914 | break; | |
2915 | if (csky_arch == NULL) | |
2916 | { | |
2917 | _bfd_error_handler (_("warning: unrecognized arch eflag '%#lx'"), | |
2918 | arch_eflag); | |
2919 | bfd_set_error (bfd_error_wrong_format); | |
2920 | } | |
2921 | return csky_arch; | |
2922 | } | |
2923 | ||
2924 | /* Merge backend specific data from an object file to the output | |
2925 | object file when linking. */ | |
2926 | ||
2927 | static bfd_boolean | |
2928 | csky_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) | |
2929 | { | |
2930 | bfd *obfd = info->output_bfd; | |
2931 | flagword old_flags; | |
2932 | flagword new_flags; | |
2933 | csky_arch_for_merge *old_arch = NULL; | |
2934 | csky_arch_for_merge *new_arch = NULL; | |
2935 | ||
2936 | /* Check if we have the same endianness. */ | |
2937 | if (! _bfd_generic_verify_endian_match (ibfd, info)) | |
2938 | return FALSE; | |
2939 | ||
2940 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
2941 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2942 | return TRUE; | |
2943 | ||
2944 | new_flags = elf_elfheader (ibfd)->e_flags; | |
2945 | old_flags = elf_elfheader (obfd)->e_flags; | |
2946 | ||
2947 | if (! elf_flags_init (obfd)) | |
2948 | { | |
2949 | /* First call, no flags set. */ | |
2950 | elf_flags_init (obfd) = TRUE; | |
2951 | elf_elfheader (obfd)->e_flags = new_flags; | |
2952 | } | |
2953 | else if (new_flags == old_flags) | |
2954 | /* Do nothing. */ | |
2955 | ; | |
2956 | else if (new_flags == 0 || old_flags == 0) | |
2957 | /* When one flag is 0, assign the other one's flag. */ | |
2958 | elf_elfheader (obfd)->e_flags = new_flags | old_flags; | |
2959 | else | |
2960 | { | |
2961 | flagword newest_flag = 0; | |
2962 | ||
2963 | if ((new_flags & CSKY_ARCH_MASK) != 0 | |
2964 | && (old_flags & CSKY_ARCH_MASK) != 0) | |
2965 | { | |
2966 | new_arch = csky_find_arch_with_eflag (new_flags & CSKY_ARCH_MASK); | |
2967 | old_arch = csky_find_arch_with_eflag (old_flags & CSKY_ARCH_MASK); | |
2968 | /* Collect flags like e, f, g. */ | |
2969 | newest_flag = (old_flags & (~CSKY_ARCH_MASK)) | |
2970 | | (new_flags & (~CSKY_ARCH_MASK)); | |
2971 | if (new_arch != NULL && old_arch != NULL) | |
2972 | { | |
2973 | if (new_arch->class != old_arch->class) | |
2974 | { | |
2975 | _bfd_error_handler | |
2976 | /* xgettext:c-format */ | |
2977 | (_("%pB: machine flag conflict with target"), ibfd); | |
2978 | bfd_set_error (bfd_error_wrong_format); | |
2979 | return FALSE; | |
2980 | } | |
2981 | else if (new_arch->class_level != old_arch->class_level) | |
2982 | { | |
2983 | csky_arch_for_merge *newest_arch | |
2984 | = (new_arch->class_level > old_arch->class_level | |
2985 | ? new_arch : old_arch); | |
2986 | if (new_arch->do_warning || old_arch->do_warning) | |
2987 | { | |
2988 | _bfd_error_handler | |
2989 | /* xgettext:c-format */ | |
2990 | (_("warning: file %pB's arch flag ck%s conflicts with " | |
2991 | "target ck%s, using ck%s"), | |
2992 | ibfd, new_arch->name, old_arch->name, | |
2993 | newest_arch->name); | |
2994 | bfd_set_error (bfd_error_wrong_format); | |
2995 | } | |
2996 | ||
2997 | newest_flag |= newest_arch->arch_eflag; | |
2998 | } | |
2999 | else | |
3000 | newest_flag |= ((new_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK)) | |
3001 | | (old_flags | |
3002 | & (CSKY_ARCH_MASK | CSKY_ABI_MASK))); | |
3003 | } | |
3004 | else | |
3005 | newest_flag |= ((new_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK)) | |
3006 | | (old_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK))); | |
3007 | } | |
3008 | else | |
3009 | newest_flag |= ((new_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK)) | |
3010 | | (old_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK))); | |
3011 | ||
3012 | elf_elfheader (obfd)->e_flags = newest_flag; | |
3013 | } | |
3014 | return TRUE; | |
3015 | } | |
3016 | ||
3017 | /* Ignore the discarded relocs in special sections in link time. */ | |
3018 | ||
3019 | static bfd_boolean | |
3020 | csky_elf_ignore_discarded_relocs (asection *sec) | |
3021 | { | |
3022 | if (strcmp (sec->name, ".csky_stack_size") == 0) | |
3023 | return TRUE; | |
3024 | return FALSE; | |
3025 | } | |
3026 | ||
3027 | /* .csky_stack_size are not referenced directly. This pass marks all of | |
3028 | them as required. */ | |
3029 | ||
3030 | static bfd_boolean | |
3031 | elf32_csky_gc_mark_extra_sections (struct bfd_link_info *info, | |
3032 | elf_gc_mark_hook_fn gc_mark_hook ATTRIBUTE_UNUSED) | |
3033 | { | |
3034 | bfd *sub; | |
3035 | ||
3036 | _bfd_elf_gc_mark_extra_sections (info, gc_mark_hook); | |
3037 | ||
3038 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) | |
3039 | { | |
3040 | asection *o; | |
3041 | ||
3042 | for (o = sub->sections; o != NULL; o = o->next) | |
3043 | if (strcmp (o->name, ".csky_stack_size") == 0) | |
3044 | o->gc_mark = 1; | |
3045 | } | |
3046 | ||
3047 | return TRUE; | |
3048 | } | |
3049 | ||
3050 | /* The linker repeatedly calls this function for each input section, | |
3051 | in the order that input sections are linked into output sections. | |
3052 | Build lists of input sections to determine groupings between which | |
3053 | we may insert linker stubs. */ | |
3054 | ||
3055 | void | |
3056 | elf32_csky_next_input_section (struct bfd_link_info *info, | |
3057 | asection *isec) | |
3058 | { | |
3059 | struct csky_elf_link_hash_table *htab = csky_elf_hash_table (info); | |
3060 | if (htab == NULL) | |
3061 | return; | |
3062 | if (isec->output_section->index <= htab->top_index) | |
3063 | { | |
3064 | asection **list = htab->input_list + isec->output_section->index; | |
3065 | ||
3066 | if (*list != bfd_abs_section_ptr) | |
3067 | { | |
3068 | /* Steal the link_sec pointer for our list. */ | |
3069 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) | |
3070 | /* This happens to make the list in reverse order, | |
3071 | which we reverse later in group_sections. */ | |
3072 | PREV_SEC (isec) = *list; | |
3073 | *list = isec; | |
3074 | } | |
3075 | } | |
3076 | } | |
3077 | ||
3078 | /* See whether we can group stub sections together. Grouping stub | |
3079 | sections may result in fewer stubs. More importantly, we need to | |
3080 | put all .init* and .fini* stubs at the end of the .init or | |
3081 | .fini output sections respectively, because glibc splits the | |
3082 | _init and _fini functions into multiple parts. Putting a stub in | |
3083 | the middle of a function is not a good idea. */ | |
3084 | ||
3085 | static void | |
3086 | group_sections (struct csky_elf_link_hash_table *htab, | |
3087 | bfd_size_type stub_group_size, | |
3088 | bfd_boolean stubs_always_after_branch) | |
3089 | { | |
3090 | asection **list = htab->input_list; | |
3091 | ||
3092 | do | |
3093 | { | |
3094 | asection *tail = *list; | |
3095 | asection *head; | |
3096 | ||
3097 | if (tail == bfd_abs_section_ptr) | |
3098 | continue; | |
3099 | ||
3100 | /* Reverse the list: we must avoid placing stubs at the | |
3101 | beginning of the section because the beginning of the text | |
3102 | section may be required for an interrupt vector in bare metal | |
3103 | code. */ | |
3104 | #define NEXT_SEC PREV_SEC | |
3105 | head = NULL; | |
3106 | while (tail != NULL) | |
3107 | { | |
3108 | /* Pop from tail. */ | |
3109 | asection *item = tail; | |
3110 | tail = PREV_SEC (item); | |
3111 | ||
3112 | /* Push on head. */ | |
3113 | NEXT_SEC (item) = head; | |
3114 | head = item; | |
3115 | } | |
3116 | ||
3117 | while (head != NULL) | |
3118 | { | |
3119 | asection *curr; | |
3120 | asection *next; | |
3121 | bfd_vma stub_group_start = head->output_offset; | |
3122 | bfd_vma end_of_next; | |
3123 | ||
3124 | curr = head; | |
3125 | while (NEXT_SEC (curr) != NULL) | |
3126 | { | |
3127 | next = NEXT_SEC (curr); | |
3128 | end_of_next = next->output_offset + next->size; | |
3129 | if (end_of_next - stub_group_start >= stub_group_size) | |
3130 | /* End of NEXT is too far from start, so stop. */ | |
3131 | break; | |
3132 | curr = next; | |
3133 | } | |
3134 | ||
3135 | /* OK, the size from the start to the start of CURR is less | |
3136 | * than stub_group_size and thus can be handled by one stub | |
3137 | * section. (Or the head section is itself larger than | |
3138 | * stub_group_size, in which case we may be toast.) | |
3139 | * We should really be keeping track of the total size of | |
3140 | * stubs added here, as stubs contribute to the final output | |
3141 | * section size. */ | |
3142 | do | |
3143 | { | |
3144 | next = NEXT_SEC (head); | |
3145 | /* Set up this stub group. */ | |
3146 | htab->stub_group[head->id].link_sec = curr; | |
3147 | } | |
3148 | while (head != curr && (head = next) != NULL); | |
3149 | ||
3150 | /* But wait, there's more! Input sections up to stub_group_size | |
3151 | * bytes after the stub section can be handled by it too. */ | |
3152 | if (!stubs_always_after_branch) | |
3153 | { | |
3154 | stub_group_start = curr->output_offset + curr->size; | |
3155 | ||
3156 | while (next != NULL) | |
3157 | { | |
3158 | end_of_next = next->output_offset + next->size; | |
3159 | if (end_of_next - stub_group_start >= stub_group_size) | |
3160 | /* End of NEXT is too far from stubs, so stop. */ | |
3161 | break; | |
3162 | /* Add NEXT to the stub group. */ | |
3163 | head = next; | |
3164 | next = NEXT_SEC (head); | |
3165 | htab->stub_group[head->id].link_sec = curr; | |
3166 | } | |
3167 | } | |
3168 | head = next; | |
3169 | } | |
3170 | } | |
3171 | while (list++ != htab->input_list + htab->top_index); | |
3172 | ||
3173 | free (htab->input_list); | |
3174 | #undef PREV_SEC | |
3175 | #undef NEXT_SEC | |
3176 | } | |
3177 | ||
3178 | /* If the symbol referenced by bsr is defined in shared object file, | |
3179 | or it is a weak symbol and we aim to create shared object file, | |
3180 | we must create a stub for this bsr. */ | |
3181 | ||
3182 | static bfd_boolean | |
3183 | sym_must_create_stub (struct elf_link_hash_entry *h, | |
3184 | struct bfd_link_info *info) | |
3185 | { | |
3186 | if (h != NULL | |
3187 | && ((h->def_dynamic && !h->def_regular) | |
3188 | || (bfd_link_pic (info) && h->root.type == bfd_link_hash_defweak))) | |
3189 | return TRUE; | |
3190 | else | |
3191 | return FALSE; | |
3192 | } | |
3193 | ||
3194 | /* Calculate the template, template size and instruction size for a stub. | |
3195 | Return value is the instruction size. */ | |
3196 | ||
3197 | static unsigned int | |
3198 | find_stub_size_and_template (enum elf32_csky_stub_type stub_type, | |
3199 | const insn_sequence **stub_template, | |
3200 | int *stub_template_size) | |
3201 | { | |
3202 | const insn_sequence *template_sequence = NULL; | |
3203 | int template_size = 0; | |
3204 | int i; | |
3205 | unsigned int size; | |
3206 | ||
3207 | template_sequence = stub_definitions[stub_type].template_sequence; | |
3208 | template_size = stub_definitions[stub_type].template_size; | |
3209 | ||
3210 | size = 0; | |
3211 | for (i = 0; i < template_size; i++) | |
3212 | { | |
3213 | switch (template_sequence[i].type) | |
3214 | { | |
3215 | case INSN16: | |
3216 | size += 2; | |
3217 | break; | |
3218 | ||
3219 | case INSN32: | |
3220 | case DATA_TYPE: | |
3221 | size += 4; | |
3222 | break; | |
3223 | ||
3224 | default: | |
3225 | BFD_FAIL (); | |
3226 | return FALSE; | |
3227 | } | |
3228 | } | |
3229 | ||
3230 | if (stub_template) | |
3231 | *stub_template = template_sequence; | |
3232 | if (stub_template_size) | |
3233 | *stub_template_size = template_size; | |
3234 | ||
3235 | return size; | |
3236 | } | |
3237 | ||
3238 | /* As above, but don't actually build the stub. Just bump offset so | |
3239 | we know stub section sizes. */ | |
3240 | ||
3241 | static bfd_boolean | |
3242 | csky_size_one_stub (struct bfd_hash_entry *gen_entry, | |
3243 | void * in_arg ATTRIBUTE_UNUSED) | |
3244 | { | |
3245 | struct elf32_csky_stub_hash_entry *stub_entry; | |
3246 | const insn_sequence *template_sequence = NULL; | |
3247 | int template_size = 0; | |
3248 | int size = 0; | |
3249 | ||
3250 | /* Massage our args to the form they really have. */ | |
3251 | stub_entry = (struct elf32_csky_stub_hash_entry *) gen_entry; | |
3252 | ||
3253 | BFD_ASSERT (stub_entry->stub_type > csky_stub_none | |
3254 | && stub_entry->stub_type < ARRAY_SIZE (stub_definitions)); | |
3255 | size = find_stub_size_and_template (stub_entry->stub_type, | |
3256 | &template_sequence, &template_size); | |
3257 | stub_entry->stub_size = size; | |
3258 | stub_entry->stub_template = template_sequence; | |
3259 | stub_entry->stub_template_size = template_size; | |
3260 | ||
3261 | size = (size + 7) & ~7; | |
3262 | stub_entry->stub_sec->size += size; | |
3263 | return TRUE; | |
3264 | } | |
3265 | ||
3266 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
3267 | stub entry are initialised. */ | |
3268 | ||
3269 | static struct elf32_csky_stub_hash_entry * | |
3270 | elf32_csky_add_stub (const char *stub_name, | |
3271 | asection *section, | |
3272 | struct csky_elf_link_hash_table *htab) | |
3273 | { | |
3274 | asection *link_sec; | |
3275 | asection *stub_sec; | |
3276 | struct elf32_csky_stub_hash_entry *stub_entry; | |
3277 | ||
3278 | stub_sec = elf32_csky_create_or_find_stub_sec (&link_sec, section, htab); | |
3279 | if (stub_sec == NULL) | |
3280 | return NULL; | |
3281 | ||
3282 | /* Enter this entry into the linker stub hash table. */ | |
3283 | stub_entry = csky_stub_hash_lookup (&htab->stub_hash_table, stub_name, | |
3284 | TRUE, FALSE); | |
3285 | if (stub_entry == NULL) | |
3286 | { | |
3287 | _bfd_error_handler (_("%pB: cannot create stub entry %s"), | |
3288 | section->owner, stub_name); | |
3289 | return NULL; | |
3290 | } | |
3291 | ||
3292 | stub_entry->stub_sec = stub_sec; | |
3293 | stub_entry->stub_offset = 0; | |
3294 | stub_entry->id_sec = link_sec; | |
3295 | ||
3296 | return stub_entry; | |
3297 | } | |
3298 | ||
3299 | /* Determine and set the size of the stub section for a final link. | |
3300 | The basic idea here is to examine all the relocations looking for | |
3301 | PC-relative calls to a target that is unreachable with a "bsr" | |
3302 | instruction. */ | |
3303 | ||
3304 | bfd_boolean | |
3305 | elf32_csky_size_stubs (bfd *output_bfd, | |
3306 | bfd *stub_bfd, | |
3307 | struct bfd_link_info *info, | |
3308 | bfd_signed_vma group_size, | |
3309 | asection *(*add_stub_section) (const char*, asection*), | |
3310 | void (*layout_sections_again) (void)) | |
3311 | { | |
3312 | bfd_size_type stub_group_size; | |
3313 | bfd_boolean stubs_always_after_branch; | |
3314 | struct csky_elf_link_hash_table *htab = csky_elf_hash_table (info); | |
3315 | ||
3316 | if (htab == NULL) | |
3317 | return FALSE; | |
3318 | ||
3319 | /* Propagate mach to stub bfd, because it may not have been | |
3320 | finalized when we created stub_bfd. */ | |
3321 | bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd), | |
3322 | bfd_get_mach (output_bfd)); | |
3323 | ||
3324 | /* Stash our params away. */ | |
3325 | htab->stub_bfd = stub_bfd; | |
3326 | htab->add_stub_section = add_stub_section; | |
3327 | htab->layout_sections_again = layout_sections_again; | |
3328 | stubs_always_after_branch = group_size < 0; | |
3329 | ||
3330 | if (group_size < 0) | |
3331 | stub_group_size = -group_size; | |
3332 | else | |
3333 | stub_group_size = group_size; | |
3334 | ||
3335 | if (stub_group_size == 1) | |
3336 | /* The 'bsr' range in abiv2 is +-64MB has to be used as the | |
3337 | default maximum size. | |
3338 | This value is 128K less than that, which allows for 131072 | |
3339 | byte stubs. If we exceed that, then we will fail to link. | |
3340 | The user will have to relink with an explicit group size | |
3341 | option. */ | |
3342 | stub_group_size = 66977792; | |
3343 | ||
3344 | group_sections (htab, stub_group_size, stubs_always_after_branch); | |
3345 | ||
3346 | while (1) | |
3347 | { | |
3348 | bfd *input_bfd; | |
3349 | unsigned int bfd_indx; | |
3350 | asection *stub_sec; | |
3351 | bfd_boolean stub_changed = FALSE; | |
3352 | ||
3353 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
3354 | input_bfd != NULL; | |
3355 | input_bfd = input_bfd->link.next, bfd_indx++) | |
3356 | { | |
3357 | Elf_Internal_Shdr *symtab_hdr; | |
3358 | asection *section; | |
3359 | Elf_Internal_Sym *local_syms = NULL; | |
3360 | ||
3361 | /* We'll need the symbol table in a second. */ | |
3362 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
3363 | if (symtab_hdr->sh_info == 0) | |
3364 | continue; | |
3365 | ||
3366 | /* Walk over each section attached to the input bfd. */ | |
3367 | for (section = input_bfd->sections; | |
3368 | section != NULL; | |
3369 | section = section->next) | |
3370 | { | |
3371 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
3372 | ||
3373 | /* If there aren't any relocs, then there's nothing more | |
3374 | * to do. */ | |
3375 | if ((section->flags & SEC_RELOC) == 0 | |
3376 | || section->reloc_count == 0 | |
3377 | || (section->flags & SEC_CODE) == 0) | |
3378 | continue; | |
3379 | ||
3380 | /* If this section is a link-once section that will be | |
3381 | discarded, then don't create any stubs. */ | |
3382 | if (section->output_section == NULL | |
3383 | || section->output_section->owner != output_bfd) | |
3384 | continue; | |
3385 | ||
3386 | /* Get the relocs. */ | |
3387 | internal_relocs = _bfd_elf_link_read_relocs (input_bfd, | |
3388 | section, | |
3389 | NULL, NULL, | |
3390 | info->keep_memory); | |
3391 | ||
3392 | if (internal_relocs == NULL) | |
3393 | goto error_ret_free_local; | |
3394 | ||
3395 | /* Now examine each relocation. */ | |
3396 | irela = internal_relocs; | |
3397 | irelaend = irela + section->reloc_count; | |
3398 | for (; irela < irelaend; irela++) | |
3399 | { | |
3400 | unsigned int r_type, r_indx; | |
3401 | enum elf32_csky_stub_type stub_type; | |
3402 | struct elf32_csky_stub_hash_entry *stub_entry; | |
3403 | asection *sym_sec; | |
3404 | bfd_vma sym_value; | |
3405 | bfd_vma destination; | |
3406 | struct csky_elf_link_hash_entry *hash; | |
3407 | const char *sym_name; | |
3408 | char *stub_name; | |
3409 | const asection *id_sec; | |
3410 | unsigned char st_type; | |
3411 | ||
3412 | r_type = ELF32_R_TYPE (irela->r_info); | |
3413 | r_indx = ELF32_R_SYM (irela->r_info); | |
3414 | if (r_type >= (unsigned int) R_CKCORE_MAX) | |
3415 | { | |
3416 | bfd_set_error (bfd_error_bad_value); | |
3417 | error_ret_free_internal: | |
3418 | if (elf_section_data (section)->relocs == NULL) | |
3419 | free (internal_relocs); | |
3420 | goto error_ret_free_local; | |
3421 | } | |
3422 | ||
3423 | /* Only look for stubs on branch instructions. */ | |
3424 | if (r_type != (unsigned int) R_CKCORE_PCREL_IMM26BY2) | |
3425 | continue; | |
3426 | /* Now determine the call target, its name, value, | |
3427 | section. */ | |
3428 | sym_sec = NULL; | |
3429 | sym_value = 0; | |
3430 | destination = 0; | |
3431 | hash = NULL; | |
3432 | sym_name = NULL; | |
3433 | if (r_indx < symtab_hdr->sh_info) | |
3434 | { | |
3435 | /* It's a local symbol. */ | |
3436 | Elf_Internal_Sym *sym; | |
3437 | Elf_Internal_Shdr *hdr; | |
3438 | if (local_syms == NULL) | |
3439 | local_syms = | |
3440 | (Elf_Internal_Sym *) symtab_hdr->contents; | |
3441 | if (local_syms == NULL) | |
3442 | { | |
3443 | local_syms = | |
3444 | bfd_elf_get_elf_syms (input_bfd, | |
3445 | symtab_hdr, | |
3446 | symtab_hdr->sh_info, | |
3447 | 0, NULL, NULL, NULL); | |
3448 | if (local_syms == NULL) | |
3449 | goto error_ret_free_internal; | |
3450 | } | |
3451 | sym = local_syms + r_indx; | |
3452 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; | |
3453 | sym_sec = hdr->bfd_section; | |
3454 | if (!sym_sec) | |
3455 | /* This is an undefined symbol. It can never | |
3456 | be resolved. */ | |
3457 | continue; | |
3458 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
3459 | sym_value = sym->st_value; | |
3460 | destination = (sym_value + irela->r_addend | |
3461 | + sym_sec->output_offset | |
3462 | + sym_sec->output_section->vma); | |
3463 | st_type = ELF_ST_TYPE (sym->st_info); | |
3464 | sym_name = | |
3465 | bfd_elf_string_from_elf_section (input_bfd, | |
3466 | symtab_hdr->sh_link, | |
3467 | sym->st_name); | |
3468 | } | |
3469 | else | |
3470 | { | |
3471 | /* It's an external symbol. */ | |
3472 | int e_indx; | |
3473 | e_indx = r_indx - symtab_hdr->sh_info; | |
3474 | hash = ((struct csky_elf_link_hash_entry *) | |
3475 | elf_sym_hashes (input_bfd)[e_indx]); | |
3476 | ||
3477 | while (hash->elf.root.type == bfd_link_hash_indirect | |
3478 | || hash->elf.root.type == bfd_link_hash_warning) | |
3479 | hash = ((struct csky_elf_link_hash_entry *) | |
3480 | hash->elf.root.u.i.link); | |
3481 | if (hash->elf.root.type == bfd_link_hash_defined | |
3482 | || hash->elf.root.type == bfd_link_hash_defweak) | |
3483 | { | |
3484 | sym_sec = hash->elf.root.u.def.section; | |
3485 | sym_value = hash->elf.root.u.def.value; | |
3486 | ||
3487 | struct csky_elf_link_hash_table *globals = | |
3488 | csky_elf_hash_table (info); | |
3489 | /* FIXME For a destination in a shared library. */ | |
3490 | if (globals->elf.splt != NULL && hash != NULL | |
3491 | && hash->elf.plt.offset != (bfd_vma) -1) | |
3492 | continue; | |
3493 | else if (sym_sec->output_section != NULL) | |
3494 | destination = (sym_value + irela->r_addend | |
3495 | + sym_sec->output_offset | |
3496 | + sym_sec->output_section->vma); | |
3497 | } | |
3498 | else if (hash->elf.root.type == bfd_link_hash_undefined | |
3499 | || (hash->elf.root.type | |
3500 | == bfd_link_hash_undefweak)) | |
3501 | /* FIXME For a destination in a shared library. */ | |
3502 | continue; | |
3503 | else | |
3504 | { | |
3505 | bfd_set_error (bfd_error_bad_value); | |
3506 | goto error_ret_free_internal; | |
3507 | } | |
3508 | st_type = ELF_ST_TYPE (hash->elf.type); | |
3509 | sym_name = hash->elf.root.root.string; | |
3510 | } | |
3511 | do | |
3512 | { | |
3513 | /* Determine what (if any) linker stub is needed. */ | |
3514 | stub_type = csky_type_of_stub (info, section, irela, | |
3515 | st_type, hash, | |
3516 | destination, sym_sec, | |
3517 | input_bfd, sym_name); | |
3518 | if (stub_type == csky_stub_none) | |
3519 | break; | |
3520 | ||
3521 | /* Support for grouping stub sections. */ | |
3522 | id_sec = htab->stub_group[section->id].link_sec; | |
3523 | ||
3524 | /* Get the name of this stub. */ | |
3525 | stub_name = elf32_csky_stub_name (id_sec, sym_sec, hash, | |
3526 | irela); | |
3527 | if (!stub_name) | |
3528 | goto error_ret_free_internal; | |
3529 | /* We've either created a stub for this reloc already, | |
3530 | or we are about to. */ | |
3531 | stub_entry | |
3532 | = csky_stub_hash_lookup (&htab->stub_hash_table, | |
3533 | stub_name, | |
3534 | FALSE, FALSE); | |
3535 | if (stub_entry != NULL) | |
3536 | { | |
3537 | /* The proper stub has already been created. */ | |
3538 | free (stub_name); | |
3539 | stub_entry->target_value = sym_value; | |
3540 | break; | |
3541 | } | |
3542 | stub_entry = elf32_csky_add_stub (stub_name, section, | |
3543 | htab); | |
3544 | if (stub_entry == NULL) | |
3545 | { | |
3546 | free (stub_name); | |
3547 | goto error_ret_free_internal; | |
3548 | } | |
3549 | stub_entry->target_value = sym_value; | |
3550 | stub_entry->target_section = sym_sec; | |
3551 | stub_entry->stub_type = stub_type; | |
3552 | stub_entry->h = hash; | |
3553 | stub_entry->st_type = st_type; | |
3554 | ||
3555 | if (sym_name == NULL) | |
3556 | sym_name = "unnamed"; | |
3557 | stub_entry->output_name = | |
3558 | bfd_alloc (htab->stub_bfd, | |
3559 | (sizeof (STUB_ENTRY_NAME) | |
3560 | + strlen (sym_name))); | |
3561 | if (stub_entry->output_name == NULL) | |
3562 | { | |
3563 | free (stub_name); | |
3564 | goto error_ret_free_internal; | |
3565 | } | |
3566 | sprintf (stub_entry->output_name, STUB_ENTRY_NAME, | |
3567 | sym_name); | |
3568 | stub_changed = TRUE; | |
3569 | } | |
3570 | while (0); | |
3571 | } | |
3572 | /* We're done with the internal relocs, free them. */ | |
3573 | if (elf_section_data (section)->relocs == NULL) | |
3574 | free (internal_relocs); | |
3575 | } | |
3576 | } | |
3577 | if (!stub_changed) | |
3578 | break; | |
3579 | /* OK, we've added some stubs. Find out the new size of the | |
3580 | stub sections. */ | |
3581 | for (stub_sec = htab->stub_bfd->sections; | |
3582 | stub_sec != NULL; | |
3583 | stub_sec = stub_sec->next) | |
3584 | { | |
3585 | /* Ignore non-stub sections. */ | |
3586 | if (!strstr (stub_sec->name, STUB_SUFFIX)) | |
3587 | continue; | |
3588 | stub_sec->size = 0; | |
3589 | } | |
3590 | bfd_hash_traverse (&htab->stub_hash_table, csky_size_one_stub, htab); | |
3591 | /* Ask the linker to do its stuff. */ | |
3592 | (*htab->layout_sections_again) (); | |
3593 | } | |
3594 | ||
3595 | return TRUE; | |
3596 | error_ret_free_local: | |
3597 | return FALSE; | |
3598 | } | |
3599 | ||
3600 | static bfd_boolean | |
3601 | csky_build_one_stub (struct bfd_hash_entry *gen_entry, | |
3602 | void * in_arg) | |
3603 | { | |
3604 | #define MAXRELOCS 2 | |
3605 | struct elf32_csky_stub_hash_entry *stub_entry; | |
3606 | struct bfd_link_info *info; | |
3607 | asection *stub_sec; | |
3608 | bfd *stub_bfd; | |
3609 | bfd_byte *loc; | |
3610 | bfd_vma sym_value; | |
3611 | int template_size; | |
3612 | int size; | |
3613 | const insn_sequence *template_sequence; | |
3614 | int i; | |
3615 | struct csky_elf_link_hash_table * globals; | |
3616 | int stub_reloc_idx[MAXRELOCS] = {-1, -1}; | |
3617 | int stub_reloc_offset[MAXRELOCS] = {0, 0}; | |
3618 | int nrelocs = 0; | |
3619 | struct elf_link_hash_entry *h = NULL; | |
3620 | ||
3621 | /* Massage our args to the form they really have. */ | |
3622 | stub_entry = (struct elf32_csky_stub_hash_entry *)gen_entry; | |
3623 | info = (struct bfd_link_info *) in_arg; | |
3624 | ||
3625 | globals = csky_elf_hash_table (info); | |
3626 | if (globals == NULL) | |
3627 | return FALSE; | |
3628 | stub_sec = stub_entry->stub_sec; | |
3629 | ||
3630 | /* Make a note of the offset within the stubs for this entry. */ | |
3631 | stub_entry->stub_offset = stub_sec->size; | |
3632 | loc = stub_sec->contents + stub_entry->stub_offset; | |
3633 | ||
3634 | stub_bfd = stub_sec->owner; | |
3635 | ||
3636 | /* This is the address of the stub destination. */ | |
3637 | h = &stub_entry->h->elf; | |
3638 | if (sym_must_create_stub (h, info) | |
3639 | && !(bfd_link_pic (info) | |
3640 | && h->root.type == bfd_link_hash_defweak | |
3641 | && h->def_regular | |
3642 | && !h->def_dynamic)) | |
3643 | sym_value = 0; | |
3644 | else | |
3645 | sym_value = (stub_entry->target_value | |
3646 | + stub_entry->target_section->output_offset | |
3647 | + stub_entry->target_section->output_section->vma); | |
3648 | ||
3649 | template_sequence = stub_entry->stub_template; | |
3650 | template_size = stub_entry->stub_template_size; | |
3651 | ||
3652 | size = 0; | |
3653 | for (i = 0; i < template_size; i++) | |
3654 | switch (template_sequence[i].type) | |
3655 | { | |
3656 | case INSN16: | |
3657 | bfd_put_16 (stub_bfd, (bfd_vma) template_sequence[i].data, | |
3658 | loc + size); | |
3659 | size += 2; | |
3660 | break; | |
3661 | case INSN32: | |
3662 | csky_put_insn_32 (stub_bfd, (bfd_vma) template_sequence[i].data, | |
3663 | loc + size); | |
3664 | size += 4; | |
3665 | break; | |
3666 | case DATA_TYPE: | |
3667 | bfd_put_32 (stub_bfd, (bfd_vma) template_sequence[i].data, | |
3668 | loc + size); | |
3669 | stub_reloc_idx[nrelocs] = i; | |
3670 | stub_reloc_offset[nrelocs++] = size; | |
3671 | size += 4; | |
3672 | break; | |
3673 | default: | |
3674 | BFD_FAIL (); | |
3675 | return FALSE; | |
3676 | } | |
3677 | stub_sec->size += size; | |
3678 | ||
3679 | /* Stub size has already been computed in csky_size_one_stub. Check | |
3680 | consistency. */ | |
3681 | BFD_ASSERT (size == stub_entry->stub_size); | |
3682 | ||
3683 | /* Assume there is at least one and at most MAXRELOCS entries to relocate | |
3684 | in each stub. */ | |
3685 | BFD_ASSERT (nrelocs != 0 && nrelocs <= MAXRELOCS); | |
3686 | ||
3687 | for (i = 0; i < nrelocs; i++) | |
3688 | { | |
3689 | if (sym_must_create_stub (h, info)) | |
3690 | { | |
3691 | Elf_Internal_Rela outrel; | |
3692 | asection * sreloc = globals->elf.srelgot; | |
3693 | ||
3694 | outrel.r_offset = stub_entry->stub_offset + stub_reloc_offset[i]; | |
3695 | outrel.r_info = | |
3696 | ELF32_R_INFO (h->dynindx, | |
3697 | template_sequence[stub_reloc_idx[i]].r_type); | |
3698 | outrel.r_addend = template_sequence[stub_reloc_idx[i]].reloc_addend; | |
3699 | ||
3700 | loc = sreloc->contents; | |
3701 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
3702 | ||
3703 | if (loc != NULL) | |
3704 | bfd_elf32_swap_reloca_out (info->output_bfd, &outrel, loc); | |
3705 | } | |
3706 | _bfd_final_link_relocate (elf32_csky_howto_from_type | |
3707 | (template_sequence[stub_reloc_idx[i]].r_type), | |
3708 | stub_bfd, stub_sec, stub_sec->contents, | |
3709 | stub_entry->stub_offset + stub_reloc_offset[i], | |
3710 | sym_value + stub_entry->target_addend, | |
3711 | template_sequence[stub_reloc_idx[i]].reloc_addend); | |
3712 | } | |
3713 | ||
3714 | return TRUE; | |
3715 | #undef MAXRELOCS | |
3716 | } | |
3717 | ||
3718 | /* Build all the stubs associated with the current output file. The | |
3719 | stubs are kept in a hash table attached to the main linker hash | |
3720 | table. We also set up the .plt entries for statically linked PIC | |
3721 | functions here. This function is called via arm_elf_finish in the | |
3722 | linker. */ | |
3723 | ||
3724 | bfd_boolean | |
3725 | elf32_csky_build_stubs (struct bfd_link_info *info) | |
3726 | { | |
3727 | asection *stub_sec; | |
3728 | struct bfd_hash_table *table; | |
3729 | struct csky_elf_link_hash_table *htab; | |
3730 | ||
3731 | htab = csky_elf_hash_table (info); | |
3732 | ||
3733 | if (htab == NULL) | |
3734 | return FALSE; | |
3735 | ||
3736 | for (stub_sec = htab->stub_bfd->sections; | |
3737 | stub_sec != NULL; | |
3738 | stub_sec = stub_sec->next) | |
3739 | { | |
3740 | bfd_size_type size; | |
3741 | ||
3742 | /* Ignore non-stub sections. */ | |
3743 | if (!strstr (stub_sec->name, STUB_SUFFIX)) | |
3744 | continue; | |
3745 | ||
3746 | /* Allocate memory to hold the linker stubs. */ | |
3747 | size = stub_sec->size; | |
3748 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); | |
3749 | if (stub_sec->contents == NULL && size != 0) | |
3750 | return FALSE; | |
3751 | stub_sec->size = 0; | |
3752 | } | |
3753 | ||
3754 | /* Build the stubs as directed by the stub hash table. */ | |
3755 | table = &htab->stub_hash_table; | |
3756 | bfd_hash_traverse (table, csky_build_one_stub, info); | |
3757 | ||
3758 | return TRUE; | |
3759 | } | |
3760 | ||
3761 | /* Set up various things so that we can make a list of input sections | |
3762 | for each output section included in the link. Returns -1 on error, | |
3763 | 0 when no stubs will be needed, and 1 on success. */ | |
3764 | ||
3765 | int | |
3766 | elf32_csky_setup_section_lists (bfd *output_bfd, | |
3767 | struct bfd_link_info *info) | |
3768 | { | |
3769 | bfd *input_bfd; | |
3770 | unsigned int bfd_count; | |
3771 | unsigned int top_id, top_index; | |
3772 | asection *section; | |
3773 | asection **input_list, **list; | |
3774 | bfd_size_type amt; | |
3775 | struct csky_elf_link_hash_table *htab = csky_elf_hash_table (info); | |
3776 | ||
3777 | if (!htab) | |
3778 | return 0; | |
3779 | if (! is_elf_hash_table (htab)) | |
3780 | return 0; | |
3781 | ||
3782 | /* Count the number of input BFDs and find the top input section id. */ | |
3783 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
3784 | input_bfd != NULL; | |
3785 | input_bfd = input_bfd->link.next) | |
3786 | { | |
3787 | bfd_count += 1; | |
3788 | for (section = input_bfd->sections; | |
3789 | section != NULL; | |
3790 | section = section->next) | |
3791 | if (top_id < section->id) | |
3792 | top_id = section->id; | |
3793 | } | |
3794 | htab->bfd_count = bfd_count; | |
3795 | amt = sizeof (struct map_stub) * (top_id + 1); | |
3796 | htab->stub_group = bfd_zmalloc (amt); | |
3797 | if (htab->stub_group == NULL) | |
3798 | return -1; | |
3799 | ||
3800 | /* We can't use output_bfd->section_count here to find the top output | |
3801 | section index as some sections may have been removed, and | |
3802 | _bfd_strip_section_from_output doesn't renumber the indices. */ | |
3803 | for (section = output_bfd->sections, top_index = 0; | |
3804 | section != NULL; | |
3805 | section = section->next) | |
3806 | if (top_index < section->index) | |
3807 | top_index = section->index; | |
3808 | htab->top_index = top_index; | |
3809 | amt = sizeof (asection *) * (top_index + 1); | |
3810 | input_list = bfd_malloc (amt); | |
3811 | htab->input_list = input_list; | |
3812 | if (input_list == NULL) | |
3813 | return -1; | |
3814 | /* For sections we aren't interested in, mark their entries with a | |
3815 | value we can check later. */ | |
3816 | list = input_list + top_index; | |
3817 | do | |
3818 | *list = bfd_abs_section_ptr; | |
3819 | while (list-- != input_list); | |
3820 | for (section = output_bfd->sections; | |
3821 | section != NULL; | |
3822 | section = section->next) | |
3823 | if ((section->flags & SEC_CODE) != 0) | |
3824 | input_list[section->index] = NULL; | |
3825 | ||
3826 | return 1; | |
3827 | } | |
3828 | ||
3829 | static bfd_reloc_status_type | |
3830 | csky_relocate_contents (reloc_howto_type *howto, | |
3831 | bfd *input_bfd, | |
3832 | long relocation, | |
3833 | bfd_byte *location) | |
3834 | { | |
3835 | int size; | |
3836 | bfd_vma x = 0; | |
3837 | bfd_reloc_status_type flag; | |
3838 | unsigned int rightshift = howto->rightshift; | |
3839 | unsigned int bitpos = howto->bitpos; | |
3840 | ||
3841 | /* If the size is negative, negate RELOCATION. This isn't very | |
3842 | general. */ | |
3843 | if (howto->size < 0) | |
3844 | relocation = -relocation; | |
3845 | ||
3846 | /* FIXME: these macros should be defined at file head or head file head. */ | |
3847 | #define CSKY_INSN_ADDI_TO_SUBI 0x04000000 | |
3848 | #define CSKY_INSN_MOV_RTB 0xc41d4820 // mov32 rx, r29, 0 | |
3849 | #define CSKY_INSN_MOV_RDB 0xc41c4820 // mov32 rx, r28, 0 | |
3850 | #define CSKY_INSN_GET_ADDI_RZ(x) (((x) & 0x03e00000) >> 21) | |
3851 | #define CSKY_INSN_SET_MOV_RZ(x) ((x) & 0x0000001f) | |
3852 | #define CSKY_INSN_JSRI_TO_LRW 0xea9a0000 | |
3853 | #define CSKY_INSN_JSR_R26 0xe8fa0000 | |
3854 | ||
3855 | /* Get the value we are going to relocate. */ | |
3856 | size = bfd_get_reloc_size (howto); | |
3857 | switch (size) | |
3858 | { | |
3859 | default: | |
3860 | case 0: | |
3861 | abort (); | |
3862 | case 1: | |
3863 | x = bfd_get_8 (input_bfd, location); | |
3864 | break; | |
3865 | case 2: | |
3866 | x = bfd_get_16 (input_bfd, location); | |
3867 | break; | |
3868 | case 4: | |
3869 | if (need_reverse_bits) | |
3870 | { | |
3871 | x = csky_get_insn_32 (input_bfd, location); | |
3872 | ||
3873 | if (R_CKCORE_DOFFSET_LO16 == howto->type) | |
3874 | { | |
3875 | if ((signed) relocation < 0) | |
3876 | { | |
3877 | x |= CSKY_INSN_ADDI_TO_SUBI; | |
3878 | relocation = -relocation; | |
3879 | } | |
3880 | else if (0 == relocation) | |
3881 | x = (CSKY_INSN_MOV_RDB | | |
3882 | CSKY_INSN_SET_MOV_RZ (CSKY_INSN_GET_ADDI_RZ (x))); | |
3883 | } | |
3884 | else if (R_CKCORE_TOFFSET_LO16 == howto->type) | |
3885 | { | |
3886 | if ((signed) relocation < 0) | |
3887 | { | |
3888 | x |= CSKY_INSN_ADDI_TO_SUBI; | |
3889 | relocation = -relocation; | |
3890 | } | |
3891 | else if (0 == relocation) | |
3892 | x = (CSKY_INSN_MOV_RTB | | |
3893 | CSKY_INSN_SET_MOV_RZ (CSKY_INSN_GET_ADDI_RZ (x))); | |
3894 | } | |
3895 | } | |
3896 | else | |
3897 | x = bfd_get_32 (input_bfd, location); | |
3898 | break; | |
3899 | } | |
3900 | /* Check for overflow. FIXME: We may drop bits during the addition | |
3901 | which we don't check for. We must either check at every single | |
3902 | operation, which would be tedious, or we must do the computations | |
3903 | in a type larger than bfd_vma, which would be inefficient. */ | |
3904 | flag = bfd_reloc_ok; | |
3905 | if (howto->complain_on_overflow != complain_overflow_dont) | |
3906 | { | |
3907 | int addrmask; | |
3908 | int fieldmask; | |
3909 | int signmask; | |
3910 | int ss; | |
3911 | int a; | |
3912 | int b; | |
3913 | int sum; | |
3914 | /* Get the values to be added together. For signed and unsigned | |
3915 | relocations, we assume that all values should be truncated to | |
3916 | the size of an address. For bitfields, all the bits matter. | |
3917 | See also bfd_check_overflow. */ | |
3918 | #define N_ONES(n) (((((bfd_vma) 1 << ((n) - 1)) - 1) << 1) | 1) | |
3919 | fieldmask = N_ONES (howto->bitsize); | |
3920 | signmask = ~fieldmask; | |
3921 | addrmask = N_ONES (bfd_arch_bits_per_address (input_bfd)) | fieldmask; | |
3922 | a = (relocation & addrmask) >> rightshift; | |
3923 | if (read_content_substitute) | |
3924 | x = read_content_substitute; | |
3925 | b = (x & howto->src_mask & addrmask) >> bitpos; | |
3926 | ||
3927 | switch (howto->complain_on_overflow) | |
3928 | { | |
3929 | case complain_overflow_signed: | |
3930 | /* If any sign bits are set, all sign bits must be set. | |
3931 | That is, A must be a valid negative address after | |
3932 | shifting. */ | |
3933 | signmask = ~(fieldmask >> 1); | |
3934 | /* Fall through. */ | |
3935 | ||
3936 | case complain_overflow_bitfield: | |
3937 | /* Much like the signed check, but for a field one bit | |
3938 | wider. We allow a bitfield to represent numbers in the | |
3939 | range -2**n to 2**n-1, where n is the number of bits in the | |
3940 | field. Note that when bfd_vma is 32 bits, a 32-bit reloc | |
3941 | can't overflow, which is exactly what we want. */ | |
3942 | ss = a & signmask; | |
3943 | if (ss != 0 && ss != ((addrmask >> rightshift) & signmask)) | |
3944 | flag = bfd_reloc_overflow; | |
3945 | /* We only need this next bit of code if the sign bit of B | |
3946 | is below the sign bit of A. This would only happen if | |
3947 | SRC_MASK had fewer bits than BITSIZE. Note that if | |
3948 | SRC_MASK has more bits than BITSIZE, we can get into | |
3949 | trouble; we would need to verify that B is in range, as | |
3950 | we do for A above. */ | |
3951 | ss = ((~howto->src_mask) >> 1) & howto->src_mask; | |
3952 | ss >>= bitpos; | |
3953 | ||
3954 | /* Set all the bits above the sign bit. */ | |
3955 | b = (b ^ ss) - ss; | |
3956 | ||
3957 | /* Now we can do the addition. */ | |
3958 | sum = a + b; | |
3959 | ||
3960 | /* See if the result has the correct sign. Bits above the | |
3961 | sign bit are junk now; ignore them. If the sum is | |
3962 | positive, make sure we did not have all negative inputs; | |
3963 | if the sum is negative, make sure we did not have all | |
3964 | positive inputs. The test below looks only at the sign | |
3965 | bits, and it really just | |
3966 | SIGN (A) == SIGN (B) && SIGN (A) != SIGN (SUM) | |
3967 | ||
3968 | We mask with addrmask here to explicitly allow an address | |
3969 | wrap-around. The Linux kernel relies on it, and it is | |
3970 | the only way to write assembler code which can run when | |
3971 | loaded at a location 0x80000000 away from the location at | |
3972 | which it is linked. */ | |
3973 | ||
3974 | if (((~(a ^ b)) & (a ^ sum)) & signmask & addrmask) | |
3975 | flag = bfd_reloc_overflow; | |
3976 | break; | |
3977 | case complain_overflow_unsigned: | |
3978 | /* Checking for an unsigned overflow is relatively easy: | |
3979 | trim the addresses and add, and trim the result as well. | |
3980 | Overflow is normally indicated when the result does not | |
3981 | fit in the field. However, we also need to consider the | |
3982 | case when, e.g., fieldmask is 0x7fffffff or smaller, an | |
3983 | input is 0x80000000, and bfd_vma is only 32 bits; then we | |
3984 | will get sum == 0, but there is an overflow, since the | |
3985 | inputs did not fit in the field. Instead of doing a | |
3986 | separate test, we can check for this by or-ing in the | |
3987 | operands when testing for the sum overflowing its final | |
3988 | field. */ | |
3989 | sum = (a + b) & addrmask; | |
3990 | if ((a | b | sum) & signmask) | |
3991 | flag = bfd_reloc_overflow; | |
3992 | break; | |
3993 | default: | |
3994 | abort (); | |
3995 | } | |
3996 | ||
3997 | } | |
3998 | /* Put RELOCATION in the right bits. */ | |
3999 | relocation >>= (bfd_vma) rightshift; | |
4000 | ||
4001 | if ((howto->type == R_CKCORE_DOFFSET_LO16 | |
4002 | || howto->type == R_CKCORE_TOFFSET_LO16) | |
4003 | && relocation == 0) | |
4004 | /* Do nothing lsli32 rx, rz, 0. */ | |
4005 | ; | |
4006 | else | |
4007 | { | |
4008 | /* Fir V1, all this relocation must be x -1. */ | |
4009 | if (howto->type == R_CKCORE_PCREL_IMM11BY2 | |
4010 | || howto->type == R_CKCORE_PCREL_JSR_IMM11BY2 | |
4011 | || howto->type == R_CKCORE_DOFFSET_LO16 | |
4012 | || howto->type == R_CKCORE_TOFFSET_LO16) | |
4013 | relocation -= 1; | |
4014 | else if (howto->type == R_CKCORE_PCREL_IMM7BY4) | |
4015 | relocation = (relocation & 0x1f) + ((relocation << 3) & 0x300); | |
4016 | else if (howto->type == R_CKCORE_PCREL_FLRW_IMM8BY4) | |
4017 | relocation | |
4018 | = ((relocation << 4) & 0xf0) + ((relocation << 17) & 0x1e00000); | |
4019 | else if (howto->type == R_CKCORE_NOJSRI) | |
4020 | { | |
4021 | x = (x & howto->dst_mask) | CSKY_INSN_JSRI_TO_LRW; | |
4022 | relocation = 0; | |
4023 | csky_put_insn_32 (input_bfd, CSKY_INSN_JSR_R26, location + 4); | |
4024 | } | |
4025 | ||
4026 | relocation <<= (bfd_vma) bitpos; | |
4027 | /* Add RELOCATION to the right bits of X. */ | |
4028 | x = ((x & ~howto->dst_mask) | |
4029 | | (((x & howto->src_mask) + relocation) & howto->dst_mask)); | |
4030 | } | |
4031 | /* Put the relocated value back in the object file. */ | |
4032 | switch (size) | |
4033 | { | |
4034 | default: | |
4035 | abort (); | |
4036 | case 1: | |
4037 | bfd_put_8 (input_bfd, x, location); | |
4038 | break; | |
4039 | case 2: | |
4040 | bfd_put_16 (input_bfd, x, location); | |
4041 | break; | |
4042 | case 4: | |
4043 | if (need_reverse_bits) | |
4044 | csky_put_insn_32 (input_bfd, x, location); | |
4045 | else | |
4046 | bfd_put_32 (input_bfd, x, location); | |
4047 | break; | |
4048 | } | |
4049 | return flag; | |
4050 | } | |
4051 | ||
4052 | /* Look up an entry in the stub hash. Stub entries are cached because | |
4053 | creating the stub name takes a bit of time. */ | |
4054 | ||
4055 | static struct elf32_csky_stub_hash_entry * | |
4056 | elf32_csky_get_stub_entry (const asection *input_section, | |
4057 | const asection *sym_sec, | |
4058 | struct elf_link_hash_entry *hash, | |
4059 | const Elf_Internal_Rela *rel, | |
4060 | struct csky_elf_link_hash_table *htab) | |
4061 | { | |
4062 | struct elf32_csky_stub_hash_entry *stub_entry; | |
4063 | struct csky_elf_link_hash_entry *h | |
4064 | = (struct csky_elf_link_hash_entry *) hash; | |
4065 | const asection *id_sec; | |
4066 | ||
4067 | if ((input_section->flags & SEC_CODE) == 0) | |
4068 | return NULL; | |
4069 | ||
4070 | /* If this input section is part of a group of sections sharing one | |
4071 | stub section, then use the id of the first section in the group. | |
4072 | Stub names need to include a section id, as there may well be | |
4073 | more than one stub used to reach say, printf, and we need to | |
4074 | distinguish between them. */ | |
4075 | id_sec = htab->stub_group[input_section->id].link_sec; | |
4076 | if (h != NULL && h->stub_cache != NULL | |
4077 | && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec) | |
4078 | stub_entry = h->stub_cache; | |
4079 | else | |
4080 | { | |
4081 | char *stub_name; | |
4082 | stub_name = elf32_csky_stub_name (id_sec, sym_sec, h, rel); | |
4083 | if (stub_name == NULL) | |
4084 | return NULL; | |
4085 | stub_entry = csky_stub_hash_lookup (&htab->stub_hash_table, | |
4086 | stub_name, FALSE, FALSE); | |
4087 | if (h != NULL) | |
4088 | h->stub_cache = stub_entry; | |
4089 | free (stub_name); | |
4090 | } | |
4091 | ||
4092 | return stub_entry; | |
4093 | } | |
4094 | ||
4095 | static bfd_reloc_status_type | |
4096 | csky_final_link_relocate (reloc_howto_type *howto, | |
4097 | bfd *input_bfd, | |
4098 | asection *input_section, | |
4099 | bfd_byte *contents, | |
4100 | bfd_vma address, | |
4101 | bfd_vma value, | |
4102 | bfd_vma addend) | |
4103 | { | |
4104 | bfd_vma relocation; | |
4105 | ||
4106 | /* Sanity check the address. */ | |
4107 | if (address > bfd_get_section_limit (input_bfd, input_section)) | |
4108 | return bfd_reloc_outofrange; | |
4109 | ||
4110 | /* This function assumes that we are dealing with a basic relocation | |
4111 | against a symbol. We want to compute the value of the symbol to | |
4112 | relocate to. This is just VALUE, the value of the symbol, | |
4113 | plus ADDEND, any addend associated with the reloc. */ | |
4114 | relocation = value + addend; | |
4115 | ||
4116 | /* If the relocation is PC relative, we want to set RELOCATION to | |
4117 | the distance between the symbol (currently in RELOCATION) and the | |
4118 | location we are relocating. Some targets (e.g., i386-aout) | |
4119 | arrange for the contents of the section to be the negative of the | |
4120 | offset of the location within the section; for such targets | |
4121 | pcrel_offset is FALSE. Other targets (e.g., m88kbcs or ELF) | |
4122 | simply leave the contents of the section as zero; for such | |
4123 | targets pcrel_offset is TRUE. If pcrel_offset is FALSE we do not | |
4124 | need to subtract out the offset of the location within the | |
4125 | section (which is just ADDRESS). */ | |
4126 | if (howto->pc_relative) | |
4127 | { | |
4128 | relocation -= (input_section->output_section->vma | |
4129 | + input_section->output_offset); | |
4130 | if (howto->pcrel_offset) | |
4131 | relocation -= address; | |
4132 | } | |
4133 | ||
4134 | return csky_relocate_contents (howto, input_bfd, relocation, | |
4135 | contents + address); | |
4136 | ||
4137 | } | |
4138 | ||
4139 | /* Return the base VMA address which should be subtracted from real addresses | |
4140 | when resolving @dtpoff relocation. | |
4141 | This is PT_TLS segment p_vaddr. */ | |
4142 | ||
4143 | static bfd_vma | |
4144 | dtpoff_base (struct bfd_link_info *info) | |
4145 | { | |
4146 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
4147 | if (elf_hash_table (info)->tls_sec == NULL) | |
4148 | return 0; | |
4149 | return elf_hash_table (info)->tls_sec->vma; | |
4150 | } | |
4151 | ||
4152 | /* Return the relocation value for @tpoff relocation | |
4153 | if STT_TLS virtual address is ADDRESS. */ | |
4154 | ||
4155 | static bfd_vma | |
4156 | tpoff (struct bfd_link_info *info, bfd_vma address) | |
4157 | { | |
4158 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
4159 | bfd_vma base; | |
4160 | ||
4161 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
4162 | if (htab->tls_sec == NULL) | |
4163 | return 0; | |
4164 | base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power); | |
4165 | return address - htab->tls_sec->vma + base; | |
4166 | } | |
4167 | ||
4168 | /* Relocate a csky section. */ | |
4169 | ||
4170 | static bfd_boolean | |
4171 | csky_elf_relocate_section (bfd * output_bfd, | |
4172 | struct bfd_link_info * info, | |
4173 | bfd * input_bfd, | |
4174 | asection * input_section, | |
4175 | bfd_byte * contents, | |
4176 | Elf_Internal_Rela * relocs, | |
4177 | Elf_Internal_Sym * local_syms, | |
4178 | asection ** local_sections) | |
4179 | { | |
4180 | Elf_Internal_Shdr *symtab_hdr; | |
4181 | struct elf_link_hash_entry **sym_hashes; | |
4182 | Elf_Internal_Rela *rel; | |
4183 | Elf_Internal_Rela *relend; | |
4184 | const char *name; | |
4185 | bfd_boolean ret = TRUE; | |
4186 | struct csky_elf_link_hash_table * htab; | |
4187 | bfd_vma *local_got_offsets = elf_local_got_offsets (input_bfd); | |
4188 | ||
4189 | htab = csky_elf_hash_table (info); | |
4190 | if (htab == NULL) | |
4191 | return FALSE; | |
4192 | ||
4193 | symtab_hdr = & elf_symtab_hdr (input_bfd); | |
4194 | sym_hashes = elf_sym_hashes (input_bfd); | |
4195 | ||
4196 | rel = relocs; | |
4197 | relend = relocs + input_section->reloc_count; | |
4198 | for (; rel < relend; rel++) | |
4199 | { | |
4200 | enum elf_csky_reloc_type r_type | |
4201 | = (enum elf_csky_reloc_type) ELF32_R_TYPE (rel->r_info); | |
4202 | unsigned long r_symndx; | |
4203 | reloc_howto_type * howto; | |
4204 | Elf_Internal_Sym * sym; | |
4205 | asection * sec; | |
4206 | bfd_vma relocation; | |
4207 | bfd_vma off; | |
4208 | struct elf_link_hash_entry * h; | |
4209 | bfd_vma addend = (bfd_vma)rel->r_addend; | |
4210 | bfd_reloc_status_type r = bfd_reloc_ok; | |
4211 | bfd_boolean unresolved_reloc = FALSE; | |
4212 | int do_final_relocate = TRUE; | |
4213 | bfd_boolean relative_reloc = FALSE; | |
4214 | bfd_signed_vma disp; | |
4215 | ||
4216 | /* Ignore these relocation types: | |
4217 | R_CKCORE_GNU_VTINHERIT, R_CKCORE_GNU_VTENTRY. */ | |
4218 | if (r_type == R_CKCORE_GNU_VTINHERIT || r_type == R_CKCORE_GNU_VTENTRY) | |
4219 | continue; | |
4220 | ||
4221 | if ((unsigned) r_type >= (unsigned) R_CKCORE_MAX) | |
4222 | { | |
4223 | /* The r_type is error, not support it. */ | |
4224 | /* xgettext:c-format */ | |
4225 | _bfd_error_handler (_("%pB: unsupported relocation type: %#x"), | |
4226 | input_bfd, r_type); | |
4227 | bfd_set_error (bfd_error_bad_value); | |
4228 | ret = FALSE; | |
4229 | continue; | |
4230 | } | |
4231 | ||
4232 | howto = &csky_elf_howto_table[(int) r_type]; | |
4233 | ||
4234 | r_symndx = ELF32_R_SYM(rel->r_info); | |
4235 | h = NULL; | |
4236 | sym = NULL; | |
4237 | sec = NULL; | |
4238 | unresolved_reloc = FALSE; | |
4239 | ||
4240 | if (r_symndx < symtab_hdr->sh_info) | |
4241 | { | |
4242 | /* Get symbol table entry. */ | |
4243 | sym = local_syms + r_symndx; | |
4244 | sec = local_sections[r_symndx]; | |
4245 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
4246 | addend = (bfd_vma)rel->r_addend; | |
4247 | } | |
4248 | else | |
4249 | { | |
4250 | bfd_boolean warned, ignored; | |
4251 | ||
4252 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
4253 | r_symndx, symtab_hdr, sym_hashes, | |
4254 | h, sec, relocation, | |
4255 | unresolved_reloc, warned, ignored); | |
4256 | } | |
4257 | ||
4258 | if (sec != NULL && discarded_section (sec)) | |
4259 | { | |
4260 | /* For relocs against symbols from removed linkonce sections, | |
4261 | or sections discarded by a linker script, we just want the | |
4262 | section contents zeroed. Avoid any special processing. | |
4263 | And if the symbol is referenced in '.csky_stack_size' section, | |
4264 | set the address to SEC_DISCARDED(0xffffffff). */ | |
4265 | #if 0 | |
4266 | /* The .csky_stack_size section is just for callgraph. */ | |
4267 | if (strcmp (input_section->name, ".csky_stack_size") == 0) | |
4268 | { | |
4269 | /* FIXME: it should define in head file. */ | |
4270 | #define SEC_DISCARDED 0xffffffff | |
4271 | bfd_put_32 (input_bfd, SEC_DISCARDED, contents + rel->r_offset); | |
4272 | rel->r_info = 0; | |
4273 | rel->r_addend = 0; | |
4274 | continue; | |
4275 | } | |
4276 | else | |
4277 | #endif | |
4278 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
4279 | rel, 1, relend, howto, 0, | |
4280 | contents); | |
4281 | } | |
4282 | ||
4283 | if (bfd_link_relocatable (info)) | |
4284 | continue; | |
4285 | ||
4286 | read_content_substitute = 0; | |
4287 | ||
4288 | /* Final link. */ | |
4289 | disp = (relocation | |
4290 | + (bfd_signed_vma) addend | |
4291 | - input_section->output_section->vma | |
4292 | - input_section->output_offset | |
4293 | - rel->r_offset); | |
4294 | /* It is for ck8xx. */ | |
4295 | #define CSKY_INSN_BSR32 0xe0000000 | |
4296 | /* It is for ck5xx/ck6xx. */ | |
4297 | #define CSKY_INSN_BSR16 0xf800 | |
4298 | #define within_range(x, L) (-(1 << (L - 1)) < (x) && (x) < (1 << (L -1)) - 2) | |
4299 | switch (howto->type) | |
4300 | { | |
4301 | case R_CKCORE_PCREL_IMM18BY2: | |
4302 | /* When h is NULL, means the instruction written as | |
4303 | grs rx, imm32 | |
4304 | if the highest bit is set, prevent the high 32bits | |
4305 | turn to 0xffffffff when signed extern in 64bit | |
4306 | host machine. */ | |
4307 | if (h == NULL && (addend & 0x80000000)) | |
4308 | addend &= 0xffffffff; | |
4309 | break; | |
4310 | case R_CKCORE_GOT12: | |
4311 | case R_CKCORE_PLT12: | |
4312 | case R_CKCORE_GOT_HI16: | |
4313 | case R_CKCORE_GOT_LO16: | |
4314 | case R_CKCORE_PLT_HI16: | |
4315 | case R_CKCORE_PLT_LO16: | |
4316 | case R_CKCORE_GOT32: | |
4317 | case R_CKCORE_GOT_IMM18BY4: | |
4318 | /* Relocation is to the entry for this symbol in the global | |
4319 | offset table. */ | |
4320 | BFD_ASSERT (htab->elf.sgot != NULL); | |
4321 | if (h != NULL) | |
4322 | { | |
4323 | /* Global symbol is defined by other modules. */ | |
4324 | bfd_boolean dyn; | |
4325 | off = h->got.offset; | |
4326 | dyn = htab->elf.dynamic_sections_created; | |
4327 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, | |
4328 | bfd_link_pic (info), h) | |
4329 | || (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info,h)) | |
4330 | || (ELF_ST_VISIBILITY(h->other) | |
4331 | && h->root.type == bfd_link_hash_undefweak)) | |
4332 | { | |
4333 | /* This is actually a static link, or it is a | |
4334 | -Bsymbolic link and the symbol is defined | |
4335 | locally, or the symbol was forced to be local | |
4336 | because of a version file. We must initialize | |
4337 | this entry in the global offset table. Since the | |
4338 | offset must always be a multiple of 4, we use the | |
4339 | least significant bit to record whether we have | |
4340 | initialized it already. | |
4341 | When doing a dynamic link, we create a .rela.dyn | |
4342 | relocation entry to initialize the value. This | |
4343 | is done in the finish_dynamic_symbol routine. FIXME */ | |
4344 | if (off & 1) | |
4345 | off &= ~1; | |
4346 | else | |
4347 | { | |
4348 | bfd_put_32 (output_bfd, relocation, | |
4349 | htab->elf.sgot->contents + off); | |
4350 | h->got.offset |= 1; | |
4351 | ||
4352 | /* TRUE if relative relocation should be generated. GOT reference to | |
4353 | global symbol in PIC will lead to dynamic symbol. It becomes a | |
4354 | problem when "time" or "times" is defined as a variable in an | |
4355 | executable, clashing with functions of the same name in libc. If a | |
4356 | symbol isn't undefined weak symbol, don't make it dynamic in PIC and | |
4357 | generate relative relocation. */ | |
4358 | #define GENERATE_RELATIVE_RELOC_P(INFO, H) \ | |
4359 | ((H)->dynindx == -1 \ | |
4360 | && !(H)->forced_local \ | |
4361 | && (H)->root.type != bfd_link_hash_undefweak \ | |
4362 | && bfd_link_pic (INFO)) | |
4363 | ||
4364 | if (GENERATE_RELATIVE_RELOC_P (info, h)) | |
4365 | /* If this symbol isn't dynamic | |
4366 | in PIC, generate R_CKCORE_RELATIVE here. */ | |
4367 | relative_reloc = TRUE; | |
4368 | } | |
4369 | } | |
4370 | else | |
4371 | unresolved_reloc = FALSE; | |
4372 | } /* End if h != NULL. */ | |
4373 | else | |
4374 | { | |
4375 | BFD_ASSERT (local_got_offsets != NULL); | |
4376 | off = local_got_offsets[r_symndx]; | |
4377 | ||
4378 | /* The offset must always be a multiple of 4. We use | |
4379 | the least significant bit to record whether we have | |
4380 | already generated the necessary reloc. */ | |
4381 | if (off & 1) | |
4382 | off &= ~1; | |
4383 | else | |
4384 | { | |
4385 | bfd_put_32 (output_bfd, relocation, | |
4386 | htab->elf.sgot->contents + off); | |
4387 | local_got_offsets[r_symndx] |= 1; | |
4388 | if (bfd_link_pic (info)) | |
4389 | relative_reloc = TRUE; | |
4390 | } | |
4391 | } | |
4392 | if (relative_reloc) | |
4393 | { | |
4394 | asection *srelgot; | |
4395 | Elf_Internal_Rela outrel; | |
4396 | bfd_byte *loc; | |
4397 | ||
4398 | srelgot = htab->elf.srelgot; | |
4399 | BFD_ASSERT (srelgot != NULL); | |
4400 | ||
4401 | outrel.r_offset | |
4402 | = (htab->elf.sgot->output_section->vma | |
4403 | + htab->elf.sgot->output_offset + off); | |
4404 | outrel.r_info = ELF32_R_INFO (0, R_CKCORE_RELATIVE); | |
4405 | outrel.r_addend = relocation; | |
4406 | loc = srelgot->contents; | |
4407 | loc += (srelgot->reloc_count++ * sizeof (Elf32_External_Rela)); | |
4408 | if (loc != NULL) | |
4409 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
4410 | } | |
4411 | relocation = htab->elf.sgot->output_offset + off; | |
4412 | break; | |
4413 | ||
4414 | case R_CKCORE_GOTOFF_IMM18: | |
4415 | case R_CKCORE_GOTOFF: | |
4416 | case R_CKCORE_GOTOFF_HI16: | |
4417 | case R_CKCORE_GOTOFF_LO16: | |
4418 | /* Relocation is relative to the start of the global offset | |
4419 | table. */ | |
4420 | /* Note that sgot->output_offset is not involved in this | |
4421 | calculation. We always want the start of .got. If we | |
4422 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
4423 | permitted by the ABI, we might have to change this | |
4424 | calculation. */ | |
4425 | relocation -= htab->elf.sgot->output_section->vma; | |
4426 | break; | |
4427 | ||
4428 | case R_CKCORE_GOTPC: | |
4429 | case R_CKCORE_GOTPC_HI16: | |
4430 | case R_CKCORE_GOTPC_LO16: | |
4431 | /* Use global offset table as symbol value. */ | |
4432 | relocation = htab->elf.sgot->output_section->vma; | |
4433 | addend = -addend; | |
4434 | unresolved_reloc = FALSE; | |
4435 | break; | |
4436 | ||
4437 | case R_CKCORE_DOFFSET_IMM18: | |
4438 | case R_CKCORE_DOFFSET_IMM18BY2: | |
4439 | case R_CKCORE_DOFFSET_IMM18BY4: | |
4440 | { | |
4441 | asection *sdata = bfd_get_section_by_name (output_bfd, ".data"); | |
4442 | relocation -= sdata->output_section->vma; | |
4443 | } | |
4444 | break; | |
4445 | ||
4446 | case R_CKCORE_DOFFSET_LO16: | |
4447 | { | |
4448 | asection *sdata = bfd_get_section_by_name (output_bfd, ".data"); | |
4449 | relocation -= sdata->output_section->vma; | |
4450 | } | |
4451 | break; | |
4452 | ||
4453 | case R_CKCORE_TOFFSET_LO16: | |
4454 | { | |
4455 | asection *stext = bfd_get_section_by_name (output_bfd, ".text"); | |
4456 | if (stext) | |
4457 | relocation -= stext->output_section->vma; | |
4458 | } | |
4459 | break; | |
4460 | ||
4461 | case R_CKCORE_PLT_IMM18BY4: | |
4462 | case R_CKCORE_PLT32: | |
4463 | /* Relocation is to the entry for this symbol in the | |
4464 | procedure linkage table. */ | |
4465 | ||
4466 | /* Resolve a PLT32 reloc against a local symbol directly, | |
4467 | without using the procedure linkage table. */ | |
4468 | if (h == NULL) | |
4469 | break; | |
4470 | ||
4471 | if (h->plt.offset == (bfd_vma) -1 || htab->elf.splt == NULL) | |
4472 | { | |
4473 | /* We didn't make a PLT entry for this symbol. This | |
4474 | happens when statically linking PIC code, or when | |
4475 | using -Bsymbolic. */ | |
4476 | if (h->got.offset != (bfd_vma) -1) | |
4477 | { | |
4478 | bfd_boolean dyn; | |
4479 | ||
4480 | off = h->got.offset; | |
4481 | dyn = htab->elf.dynamic_sections_created; | |
4482 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, | |
4483 | bfd_link_pic (info), h) | |
4484 | || (bfd_link_pic (info) | |
4485 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
4486 | || (ELF_ST_VISIBILITY (h->other) | |
4487 | && h->root.type == bfd_link_hash_undefweak)) | |
4488 | { | |
4489 | /* This is actually a static link, or it is a | |
4490 | -Bsymbolic link and the symbol is defined | |
4491 | locally, or the symbol was forced to be local | |
4492 | because of a version file. We must initialize | |
4493 | this entry in the global offset table. Since the | |
4494 | offset must always be a multiple of 4, we use the | |
4495 | least significant bit to record whether we have | |
4496 | initialized it already. | |
4497 | ||
4498 | When doing a dynamic link, we create a .rela.dyn | |
4499 | relocation entry to initialize the value. This | |
4500 | is done in the finish_dynamic_symbol routine. | |
4501 | FIXME! */ | |
4502 | if (off & 1) | |
4503 | off &= ~1; | |
4504 | else | |
4505 | { | |
4506 | h->got.offset |= 1; | |
4507 | if (GENERATE_RELATIVE_RELOC_P (info, h)) | |
4508 | relative_reloc = TRUE; | |
4509 | } | |
4510 | } | |
4511 | bfd_put_32 (output_bfd, relocation, | |
4512 | htab->elf.sgot->contents + off); | |
4513 | ||
4514 | if (relative_reloc) | |
4515 | { | |
4516 | asection *srelgot; | |
4517 | Elf_Internal_Rela outrel; | |
4518 | bfd_byte *loc; | |
4519 | ||
4520 | srelgot = htab->elf.srelgot; | |
4521 | BFD_ASSERT (srelgot != NULL); | |
4522 | ||
4523 | outrel.r_offset | |
4524 | = (htab->elf.sgot->output_section->vma | |
4525 | + htab->elf.sgot->output_offset + off); | |
4526 | outrel.r_info = ELF32_R_INFO (0, R_CKCORE_RELATIVE); | |
4527 | outrel.r_addend = relocation; | |
4528 | loc = srelgot->contents; | |
4529 | loc += (srelgot->reloc_count++ | |
4530 | * sizeof (Elf32_External_Rela)); | |
4531 | if (loc != NULL) | |
4532 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
4533 | } | |
4534 | relocation = off + htab->elf.sgot->output_offset; | |
4535 | } | |
4536 | break; | |
4537 | } | |
4538 | /* The relocation is the got offset. */ | |
4539 | if (bfd_csky_abi (output_bfd) == CSKY_ABI_V2) | |
4540 | relocation = (h->plt.offset / PLT_ENTRY_SIZE + 2) * 4; | |
4541 | else | |
4542 | relocation = (h->plt.offset / PLT_ENTRY_SIZE_P + 2) * 4; | |
4543 | unresolved_reloc = FALSE; | |
4544 | break; | |
4545 | ||
4546 | case R_CKCORE_PCREL_IMM26BY2: | |
4547 | case R_CKCORE_PCREL_JSR_IMM26BY2: | |
4548 | case R_CKCORE_PCREL_JSR_IMM11BY2: | |
4549 | case R_CKCORE_PCREL_IMM11BY2: | |
4550 | case R_CKCORE_CALLGRAPH: | |
4551 | /* Emit callgraph information first. */ | |
4552 | /* TODO: deal with callgraph. */ | |
4553 | if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_CALLGRAPH) | |
4554 | break; | |
4555 | /* Some reloc need further handling. */ | |
4556 | /* h == NULL means the symbol is a local symbol, | |
4557 | r_symndx == 0 means the symbol is 'ABS' and | |
4558 | the relocation is already handled in assemble, | |
4559 | here just use for callgraph. */ | |
4560 | /* TODO: deal with callgraph. */ | |
4561 | if (h == NULL && r_symndx == 0) | |
4562 | { | |
4563 | do_final_relocate = FALSE; | |
4564 | break; | |
4565 | } | |
4566 | ||
4567 | /* Ignore weak references to undefined symbols. */ | |
4568 | if (h != NULL && h->root.type == bfd_link_hash_undefweak) | |
4569 | { | |
4570 | do_final_relocate = FALSE; | |
4571 | break; | |
4572 | } | |
4573 | ||
4574 | /* Using branch stub. */ | |
4575 | if (use_branch_stub == TRUE | |
4576 | && ELF32_R_TYPE (rel->r_info) == R_CKCORE_PCREL_IMM26BY2) | |
4577 | { | |
4578 | struct elf32_csky_stub_hash_entry *stub_entry = NULL; | |
4579 | if (sym_must_create_stub (h, info)) | |
4580 | stub_entry = elf32_csky_get_stub_entry (input_section, | |
4581 | input_section, | |
4582 | h, rel, htab); | |
4583 | else if (disp > BSR_MAX_FWD_BRANCH_OFFSET | |
4584 | || disp < BSR_MAX_BWD_BRANCH_OFFSET) | |
4585 | stub_entry = elf32_csky_get_stub_entry (input_section, | |
4586 | input_section, | |
4587 | h, rel, htab); | |
4588 | if (stub_entry != NULL) | |
4589 | relocation | |
4590 | = (stub_entry->stub_offset | |
4591 | + stub_entry->stub_sec->output_offset | |
4592 | + stub_entry->stub_sec->output_section->vma); | |
4593 | break; | |
4594 | } | |
4595 | ||
4596 | else if (h == NULL | |
4597 | || (h->root.type == bfd_link_hash_defined | |
4598 | && h->dynindx == -1) | |
4599 | || ((h->def_regular && !h->def_dynamic) | |
4600 | && (h->root.type != bfd_link_hash_defweak | |
4601 | || ! bfd_link_pic (info)))) | |
4602 | { | |
4603 | if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_PCREL_JSR_IMM26BY2) | |
4604 | { | |
4605 | if (within_range (disp, 26)) | |
4606 | { | |
4607 | /* In range for BSR32. */ | |
4608 | howto = &csky_elf_howto_table[R_CKCORE_PCREL_IMM26BY2]; | |
4609 | read_content_substitute = CSKY_INSN_BSR32; | |
4610 | } | |
4611 | else if (bfd_csky_arch (output_bfd) == CSKY_ARCH_810) | |
4612 | /* if bsr32 cannot reach, generate | |
4613 | "lrw r25, label; jsr r25" instead of | |
4614 | jsri label. */ | |
4615 | howto = &csky_elf_howto_table[R_CKCORE_NOJSRI]; | |
4616 | } /* if ELF32_R_TYPE (rel->r_info)... */ | |
4617 | else if (ELF32_R_TYPE (rel->r_info) | |
4618 | == R_CKCORE_PCREL_JSR_IMM11BY2) | |
4619 | { | |
4620 | if (within_range (disp, 11)) | |
4621 | { | |
4622 | /* In range for BSR16. */ | |
4623 | howto = &csky_elf_howto_table[R_CKCORE_PCREL_IMM11BY2]; | |
4624 | read_content_substitute = CSKY_INSN_BSR16; | |
4625 | } | |
4626 | } | |
4627 | break; | |
4628 | } /* else if h == NULL... */ | |
4629 | ||
4630 | else if (bfd_csky_arch (output_bfd) == CSKY_ARCH_810 | |
4631 | && (ELF32_R_TYPE (rel->r_info) | |
4632 | == R_CKCORE_PCREL_JSR_IMM26BY2)) | |
4633 | { | |
4634 | howto = &csky_elf_howto_table[R_CKCORE_NOJSRI]; | |
4635 | break; | |
4636 | } | |
4637 | /* Other situation, h->def_dynamic == 1, | |
4638 | undefined_symbol when output file is shared object, etc. */ | |
4639 | /* Else fall through. */ | |
4640 | ||
4641 | case R_CKCORE_ADDR_HI16: | |
4642 | case R_CKCORE_ADDR_LO16: | |
4643 | if (bfd_link_pic (info) | |
4644 | || (!bfd_link_pic (info) | |
4645 | && h != NULL | |
4646 | && h->dynindx != -1 | |
4647 | && !h->non_got_ref | |
4648 | && ((h->def_dynamic && !h->def_regular) | |
4649 | || (htab->elf.dynamic_sections_created | |
4650 | && (h->root.type == bfd_link_hash_undefweak | |
4651 | || h->root.type == bfd_link_hash_undefined | |
4652 | || h->root.type == bfd_link_hash_indirect))))) | |
4653 | { | |
4654 | Elf_Internal_Rela outrel; | |
4655 | bfd_boolean skip, relocate; | |
4656 | bfd_byte *loc; | |
4657 | ||
4658 | /* When generating a shared object, these relocations | |
4659 | are copied into the output file to be resolved at | |
4660 | run time. */ | |
4661 | skip = FALSE; | |
4662 | relocate = FALSE; | |
4663 | ||
4664 | outrel.r_offset = | |
4665 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
4666 | rel->r_offset); | |
4667 | if (outrel.r_offset == (bfd_vma) -1) | |
4668 | skip = TRUE; | |
4669 | else if (outrel.r_offset == (bfd_vma) -2) | |
4670 | { | |
4671 | skip = TRUE; | |
4672 | relocate = TRUE; | |
4673 | } | |
4674 | outrel.r_offset += (input_section->output_section->vma | |
4675 | + input_section->output_offset); | |
4676 | if (skip) | |
4677 | memset (&outrel, 0, sizeof (outrel)); | |
4678 | else if (h != NULL | |
4679 | && h->dynindx != -1 | |
4680 | && (!bfd_link_pic (info) | |
4681 | || (!SYMBOLIC_BIND (info, h) | |
4682 | && h->root.type == bfd_link_hash_defweak) | |
4683 | || !h->def_regular)) | |
4684 | { | |
4685 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
4686 | outrel.r_addend = rel->r_addend; | |
4687 | } | |
4688 | else | |
4689 | { | |
4690 | /* This symbol is local, or marked to become local. */ | |
4691 | relocate = TRUE; | |
4692 | outrel.r_info = ELF32_R_INFO (0, r_type); | |
4693 | outrel.r_addend = relocation + rel->r_addend; | |
4694 | } | |
4695 | loc = htab->elf.srelgot->contents; | |
4696 | loc += (htab->elf.srelgot->reloc_count++ | |
4697 | * sizeof (Elf32_External_Rela)); | |
4698 | ||
4699 | if (loc != NULL) | |
4700 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
4701 | ||
4702 | /* If this reloc is against an external symbol, we do not | |
4703 | want to diddle with the addend. Otherwise, we need to | |
4704 | include the symbol value so that it becomes an addend | |
4705 | for the dynamic reloc. */ | |
4706 | if (!relocate) | |
4707 | continue; | |
4708 | } /* if bfd_link_pic (info) ... */ | |
4709 | break; | |
4710 | ||
4711 | case R_CKCORE_ADDR32: | |
4712 | /* r_symndx will be zero only for relocs against symbols | |
4713 | from removed linkonce sections, or sections discarded | |
4714 | by a linker script. | |
4715 | This relocation don't nedd to handle, the value will | |
4716 | be set to SEC_DISCARDED(0xffffffff). */ | |
4717 | if (r_symndx == 0 | |
4718 | && strcmp (sec->name, ".csky_stack_size") == 0) | |
4719 | { | |
4720 | do_final_relocate = FALSE; | |
4721 | break; | |
4722 | } | |
4723 | if (r_symndx >= symtab_hdr->sh_info | |
4724 | && h->non_got_ref | |
4725 | && bfd_link_executable (info)) | |
4726 | break; | |
4727 | ||
4728 | if (r_symndx == 0 || (input_section->flags & SEC_ALLOC) == 0) | |
4729 | break; | |
4730 | ||
4731 | if (bfd_link_pic (info) | |
4732 | || (h != NULL | |
4733 | && h->dynindx != -1 | |
4734 | && ((h->def_dynamic && !h->def_regular) | |
4735 | || (htab->elf.dynamic_sections_created | |
4736 | && (h->root.type == bfd_link_hash_undefweak | |
4737 | || h->root.type == bfd_link_hash_undefined | |
4738 | || h->root.type == bfd_link_hash_indirect))))) | |
4739 | { | |
4740 | Elf_Internal_Rela outrel; | |
4741 | bfd_boolean skip, relocate; | |
4742 | bfd_byte *loc; | |
4743 | ||
4744 | /* When generating a shared object, these relocations | |
4745 | are copied into the output file to be resolved at | |
4746 | run time. */ | |
4747 | skip = FALSE; | |
4748 | relocate = FALSE; | |
4749 | ||
4750 | outrel.r_offset = | |
4751 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
4752 | rel->r_offset); | |
4753 | ||
4754 | if (outrel.r_offset == (bfd_vma) -1) | |
4755 | skip = TRUE; | |
4756 | else if (outrel.r_offset == (bfd_vma) -2) | |
4757 | { | |
4758 | skip = TRUE; | |
4759 | relocate = TRUE; | |
4760 | } | |
4761 | ||
4762 | outrel.r_offset += (input_section->output_section->vma | |
4763 | + input_section->output_offset); | |
4764 | ||
4765 | if (skip) | |
4766 | memset (&outrel, 0, sizeof (outrel)); | |
4767 | else if (h != NULL | |
4768 | && h->dynindx != -1 | |
4769 | && (!bfd_link_pic (info) | |
4770 | || (!SYMBOLIC_BIND (info, h) | |
4771 | && h->root.type == bfd_link_hash_defweak) | |
4772 | || !h->def_regular)) | |
4773 | { | |
4774 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
4775 | outrel.r_addend = rel->r_addend; | |
4776 | } | |
4777 | else | |
4778 | { | |
4779 | /* This symbol is local, or marked to become local. */ | |
4780 | outrel.r_info = ELF32_R_INFO (0, R_CKCORE_RELATIVE); | |
4781 | outrel.r_addend = relocation + rel->r_addend; | |
4782 | } | |
4783 | ||
4784 | loc = htab->elf.srelgot->contents; | |
4785 | loc += (htab->elf.srelgot->reloc_count++ | |
4786 | * sizeof (Elf32_External_Rela)); | |
4787 | ||
4788 | if (loc != NULL) | |
4789 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
4790 | ||
4791 | /* If this reloc is against an external symbol, we do | |
4792 | want to diddle with the addend. Otherwise, we need to | |
4793 | include the symbol value so that it becomes an addend | |
4794 | for the dynamic reloc. */ | |
4795 | if (! relocate) | |
4796 | continue; | |
4797 | } | |
4798 | break; | |
4799 | ||
4800 | case R_CKCORE_TLS_LDO32: | |
4801 | relocation = relocation - dtpoff_base (info); | |
4802 | break; | |
4803 | ||
4804 | case R_CKCORE_TLS_LDM32: | |
4805 | BFD_ASSERT (htab->elf.sgot != NULL); | |
4806 | off = htab->tls_ldm_got.offset; | |
4807 | if (off & 1) | |
4808 | off &= ~1; | |
4809 | else | |
4810 | { | |
4811 | /* If we don't know the module number, | |
4812 | create a relocation for it. */ | |
4813 | if (!bfd_link_executable (info)) | |
4814 | { | |
4815 | Elf_Internal_Rela outrel; | |
4816 | bfd_byte *loc; | |
4817 | ||
4818 | BFD_ASSERT (htab->elf.srelgot != NULL); | |
4819 | outrel.r_addend = 0; | |
4820 | outrel.r_offset | |
4821 | = (htab->elf.sgot->output_section->vma | |
4822 | + htab->elf.sgot->output_offset + off); | |
4823 | outrel.r_info = ELF32_R_INFO (0, R_CKCORE_TLS_DTPMOD32); | |
4824 | bfd_put_32 (output_bfd, outrel.r_addend, | |
4825 | htab->elf.sgot->contents + off); | |
4826 | ||
4827 | loc = htab->elf.srelgot->contents; | |
4828 | loc += (htab->elf.srelgot->reloc_count++ | |
4829 | * sizeof (Elf32_External_Rela)); | |
4830 | if (loc) | |
4831 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
4832 | } | |
4833 | else | |
4834 | bfd_put_32 (output_bfd, 1, | |
4835 | htab->elf.sgot->contents + off); | |
4836 | htab->tls_ldm_got.offset |= 1; | |
4837 | } | |
4838 | relocation | |
4839 | = (htab->elf.sgot->output_section->vma | |
4840 | + htab->elf.sgot->output_offset + off | |
4841 | - (input_section->output_section->vma | |
4842 | + input_section->output_offset + rel->r_offset)); | |
4843 | break; | |
4844 | case R_CKCORE_TLS_LE32: | |
4845 | if (bfd_link_dll (info)) | |
4846 | { | |
4847 | _bfd_error_handler | |
4848 | /* xgettext:c-format */ | |
4849 | (_("%pB(%pA+%#" PRIx64 "): %s relocation not permitted " | |
4850 | "in shared object"), | |
4851 | input_bfd, input_section, (uint64_t)rel->r_offset, | |
4852 | howto->name); | |
4853 | return FALSE; | |
4854 | } | |
4855 | else | |
4856 | relocation = tpoff (info, relocation); | |
4857 | break; | |
4858 | case R_CKCORE_TLS_GD32: | |
4859 | case R_CKCORE_TLS_IE32: | |
4860 | { | |
4861 | int indx; | |
4862 | char tls_type; | |
4863 | ||
4864 | BFD_ASSERT (htab->elf.sgot != NULL); | |
4865 | ||
4866 | indx = 0; | |
4867 | if (h != NULL) | |
4868 | { | |
4869 | bfd_boolean dyn; | |
4870 | dyn = htab->elf.dynamic_sections_created; | |
4871 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, | |
4872 | bfd_link_pic (info), h) | |
4873 | && (!bfd_link_pic (info) | |
4874 | || !SYMBOL_REFERENCES_LOCAL (info, h))) | |
4875 | { | |
4876 | unresolved_reloc = FALSE; | |
4877 | indx = h->dynindx; | |
4878 | } | |
4879 | off = h->got.offset; | |
4880 | tls_type = ((struct csky_elf_link_hash_entry *)h)->tls_type; | |
4881 | } | |
4882 | else | |
4883 | { | |
4884 | BFD_ASSERT (local_got_offsets != NULL); | |
4885 | off = local_got_offsets[r_symndx]; | |
4886 | tls_type = csky_elf_local_got_tls_type (input_bfd)[r_symndx]; | |
4887 | } | |
4888 | ||
4889 | BFD_ASSERT (tls_type != GOT_UNKNOWN); | |
4890 | ||
4891 | if (off & 1) | |
4892 | off &= ~1; | |
4893 | else | |
4894 | { | |
4895 | bfd_boolean need_relocs = FALSE; | |
4896 | Elf_Internal_Rela outrel; | |
4897 | bfd_byte *loc = NULL; | |
4898 | int cur_off = off; | |
4899 | /* The GOT entries have not been initialized yet. Do it | |
4900 | now, and emit any relocations. If both an IE GOT and a | |
4901 | GD GOT are necessary, we emit the GD first. */ | |
4902 | if ((!bfd_link_executable (info) || indx != 0) | |
4903 | && (h == NULL | |
4904 | || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
4905 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) | |
4906 | || h->root.type != bfd_link_hash_undefined)) | |
4907 | { | |
4908 | need_relocs = TRUE; | |
4909 | BFD_ASSERT (htab->elf.srelgot != NULL); | |
4910 | ||
4911 | loc = htab->elf.srelgot->contents; | |
4912 | loc += (htab->elf.srelgot->reloc_count | |
4913 | * sizeof (Elf32_External_Rela)); | |
4914 | } | |
4915 | if (tls_type & GOT_TLS_GD) | |
4916 | { | |
4917 | if (need_relocs) | |
4918 | { | |
4919 | outrel.r_addend = 0; | |
4920 | outrel.r_offset | |
4921 | = (htab->elf.sgot->output_section->vma | |
4922 | + htab->elf.sgot->output_offset | |
4923 | + cur_off); | |
4924 | outrel.r_info | |
4925 | = ELF32_R_INFO (indx, R_CKCORE_TLS_DTPMOD32); | |
4926 | bfd_put_32 (output_bfd, outrel.r_addend, | |
4927 | htab->elf.sgot->contents + cur_off); | |
4928 | if (loc) | |
4929 | bfd_elf32_swap_reloca_out (output_bfd, | |
4930 | &outrel, loc); | |
4931 | loc += sizeof (Elf32_External_Rela); | |
4932 | htab->elf.srelgot->reloc_count++; | |
4933 | if (indx == 0) | |
4934 | bfd_put_32 (output_bfd, | |
4935 | relocation - dtpoff_base (info), | |
4936 | (htab->elf.sgot->contents | |
4937 | + cur_off + 4)); | |
4938 | else | |
4939 | { | |
4940 | outrel.r_addend = 0; | |
4941 | outrel.r_info | |
4942 | = ELF32_R_INFO (indx, R_CKCORE_TLS_DTPOFF32); | |
4943 | outrel.r_offset += 4; | |
4944 | bfd_put_32 (output_bfd, outrel.r_addend, | |
4945 | (htab->elf.sgot->contents | |
4946 | + cur_off + 4)); | |
4947 | outrel.r_info = | |
4948 | ELF32_R_INFO (indx, | |
4949 | R_CKCORE_TLS_DTPOFF32); | |
4950 | if (loc) | |
4951 | bfd_elf32_swap_reloca_out (output_bfd, | |
4952 | &outrel, | |
4953 | loc); | |
4954 | htab->elf.srelgot->reloc_count++; | |
4955 | loc += sizeof (Elf32_External_Rela); | |
4956 | } | |
4957 | ||
4958 | } | |
4959 | else | |
4960 | { | |
4961 | /* If are not emitting relocations for a | |
4962 | general dynamic reference, then we must be in a | |
4963 | static link or an executable link with the | |
4964 | symbol binding locally. Mark it as belonging | |
4965 | to module 1, the executable. */ | |
4966 | bfd_put_32 (output_bfd, 1, | |
4967 | htab->elf.sgot->contents + cur_off); | |
4968 | bfd_put_32 (output_bfd, | |
4969 | relocation - dtpoff_base (info), | |
4970 | htab->elf.sgot->contents | |
4971 | + cur_off + 4); | |
4972 | } | |
4973 | cur_off += 8; | |
4974 | } | |
4975 | if (tls_type & GOT_TLS_IE) | |
4976 | { | |
4977 | if (need_relocs) | |
4978 | { | |
4979 | if (indx == 0) | |
4980 | outrel.r_addend = relocation - dtpoff_base (info); | |
4981 | else | |
4982 | outrel.r_addend = 0; | |
4983 | outrel.r_offset | |
4984 | = (htab->elf.sgot->output_section->vma | |
4985 | + htab->elf.sgot->output_offset + cur_off); | |
4986 | outrel.r_info | |
4987 | = ELF32_R_INFO (indx, R_CKCORE_TLS_TPOFF32); | |
4988 | ||
4989 | bfd_put_32 (output_bfd, outrel.r_addend, | |
4990 | htab->elf.sgot->contents + cur_off); | |
4991 | if (loc) | |
4992 | bfd_elf32_swap_reloca_out (output_bfd, | |
4993 | &outrel, loc); | |
4994 | htab->elf.srelgot->reloc_count++; | |
4995 | loc += sizeof (Elf32_External_Rela); | |
4996 | } | |
4997 | else | |
4998 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
4999 | htab->elf.sgot->contents + cur_off); | |
5000 | } | |
5001 | if (h != NULL) | |
5002 | h->got.offset |= 1; | |
5003 | else | |
5004 | local_got_offsets[r_symndx] |= 1; | |
5005 | } | |
5006 | if ((tls_type & GOT_TLS_GD) && howto->type != R_CKCORE_TLS_GD32) | |
5007 | off += 8; | |
5008 | relocation | |
5009 | = (htab->elf.sgot->output_section->vma | |
5010 | + htab->elf.sgot->output_offset + off | |
5011 | - (input_section->output_section->vma | |
5012 | + input_section->output_offset | |
5013 | + rel->r_offset)); | |
5014 | break; | |
5015 | } | |
5016 | default: | |
5017 | /* No substitution when final linking. */ | |
5018 | read_content_substitute = 0; | |
5019 | break; | |
5020 | } /* End switch (howto->type). */ | |
5021 | ||
5022 | /* Make sure 32-bit data in the text section will not be affected by | |
5023 | our special endianness. | |
5024 | However, this currently affects noting, since the ADDR32 howto type | |
5025 | does no change with the data read. But we may need this mechanism in | |
5026 | the future. */ | |
5027 | ||
5028 | if (howto->size == 2 | |
5029 | && (howto->type == R_CKCORE_ADDR32 | |
5030 | || howto->type == R_CKCORE_GOT32 | |
5031 | || howto->type == R_CKCORE_GOTOFF | |
5032 | || howto->type == R_CKCORE_GOTPC | |
5033 | || howto->type == R_CKCORE_PLT32 | |
5034 | || howto->type == R_CKCORE_TLS_LE32 | |
5035 | || howto->type == R_CKCORE_TLS_IE32 | |
5036 | || howto->type == R_CKCORE_TLS_LDM32 | |
5037 | || howto->type == R_CKCORE_TLS_GD32 | |
5038 | || howto->type == R_CKCORE_TLS_LDO32 | |
5039 | || howto->type == R_CKCORE_RELATIVE)) | |
5040 | need_reverse_bits = 0; | |
5041 | else | |
5042 | need_reverse_bits = 1; | |
5043 | /* Do the final link. */ | |
5044 | if (howto->type != R_CKCORE_PCREL_JSR_IMM11BY2 | |
5045 | && howto->type != R_CKCORE_PCREL_JSR_IMM26BY2 | |
5046 | && howto->type != R_CKCORE_CALLGRAPH | |
5047 | && do_final_relocate) | |
5048 | r = csky_final_link_relocate (howto, input_bfd, input_section, | |
5049 | contents, rel->r_offset, | |
5050 | relocation, addend); | |
5051 | ||
5052 | if (r != bfd_reloc_ok) | |
5053 | { | |
5054 | ret = FALSE; | |
5055 | switch (r) | |
5056 | { | |
5057 | default: | |
5058 | break; | |
5059 | case bfd_reloc_overflow: | |
5060 | if (h != NULL) | |
5061 | name = NULL; | |
5062 | else | |
5063 | { | |
5064 | name = bfd_elf_string_from_elf_section (input_bfd, | |
5065 | symtab_hdr->sh_link, | |
5066 | sym->st_name); | |
5067 | if (name == NULL) | |
5068 | break; | |
5069 | if (*name == '\0') | |
5070 | name = bfd_section_name (input_bfd, sec); | |
5071 | } | |
5072 | (*info->callbacks->reloc_overflow) | |
5073 | (info, | |
5074 | (h ? &h->root : NULL), | |
5075 | name, howto->name, (bfd_vma) 0, | |
5076 | input_bfd, input_section, rel->r_offset); | |
5077 | break; | |
5078 | } | |
5079 | } | |
5080 | } /* End for (;rel < relend; rel++). */ | |
5081 | return ret; | |
5082 | } | |
5083 | ||
5084 | static bfd_boolean | |
5085 | csky_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) | |
5086 | { | |
5087 | int offset; | |
5088 | size_t size; | |
5089 | ||
5090 | switch (note->descsz) | |
5091 | { | |
5092 | default: | |
5093 | return FALSE; | |
5094 | /* Sizeof (struct elf_prstatus) on C-SKY V1 arch. */ | |
5095 | case 148: | |
5096 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); | |
5097 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); | |
5098 | offset = 72; | |
5099 | size = 72; | |
5100 | break; | |
5101 | /* Sizeof (struct elf_prstatus) on C-SKY V1 arch. */ | |
5102 | case 220: | |
5103 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); | |
5104 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); | |
5105 | offset = 72; | |
5106 | size = 34 * 4; | |
5107 | break; | |
5108 | } | |
5109 | /* Make a ".reg/999" section. */ | |
5110 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
5111 | size, note->descpos + offset); | |
5112 | } | |
5113 | ||
5114 | static bfd_boolean | |
5115 | csky_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) | |
5116 | { | |
5117 | switch (note->descsz) | |
5118 | { | |
5119 | default: | |
5120 | return FALSE; | |
5121 | ||
5122 | /* Sizeof (struct elf_prpsinfo) on linux csky. */ | |
5123 | case 124: | |
5124 | elf_tdata (abfd)->core->program | |
5125 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); | |
5126 | elf_tdata (abfd)->core->command | |
5127 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); | |
5128 | } | |
5129 | ||
5130 | /* Note that for some reason, a spurious space is tacked | |
5131 | onto the end of the args in some (at least one anyway) | |
5132 | implementations, so strip it off if it exists. */ | |
5133 | { | |
5134 | char *command = elf_tdata (abfd)->core->command; | |
5135 | int n = strlen (command); | |
5136 | ||
5137 | if (0 < n && command[n - 1] == ' ') | |
5138 | command[n - 1] = '\0'; | |
5139 | } | |
5140 | ||
5141 | return TRUE; | |
5142 | } | |
5143 | ||
5144 | /* End of external entry points for sizing and building linker stubs. */ | |
5145 | ||
5146 | /* CPU-related basic API. */ | |
5147 | #define TARGET_BIG_SYM csky_elf32_be_vec | |
5148 | #define TARGET_BIG_NAME "elf32-csky-big" | |
5149 | #define TARGET_LITTLE_SYM csky_elf32_le_vec | |
5150 | #define TARGET_LITTLE_NAME "elf32-csky-little" | |
5151 | #define ELF_ARCH bfd_arch_csky | |
5152 | #define ELF_MACHINE_CODE EM_CSKY | |
5153 | #define ELF_MACHINE_ALT1 EM_CSKY_OLD | |
5154 | #define ELF_MAXPAGESIZE 0x1000 | |
5155 | #define elf_info_to_howto csky_elf_info_to_howto | |
5156 | #define elf_info_to_howto_rel NULL | |
5157 | #define elf_backend_special_sections csky_elf_special_sections | |
5158 | #define bfd_elf32_bfd_link_hash_table_create csky_elf_link_hash_table_create | |
5159 | ||
5160 | /* Target related API. */ | |
5161 | #define bfd_elf32_mkobject csky_elf_mkobject | |
5162 | #define bfd_elf32_bfd_merge_private_bfd_data csky_elf_merge_private_bfd_data | |
5163 | #define bfd_elf32_bfd_set_private_flags csky_elf_set_private_flags | |
5164 | #define elf_backend_copy_indirect_symbol csky_elf_copy_indirect_symbol | |
5165 | ||
5166 | /* GC section related API. */ | |
5167 | #define elf_backend_can_gc_sections 1 | |
5168 | #define elf_backend_gc_mark_hook csky_elf_gc_mark_hook | |
5169 | #define elf_backend_gc_mark_extra_sections elf32_csky_gc_mark_extra_sections | |
5170 | ||
5171 | /* Relocation related API. */ | |
5172 | #define elf_backend_reloc_type_class csky_elf_reloc_type_class | |
5173 | #define bfd_elf32_bfd_reloc_type_lookup csky_elf_reloc_type_lookup | |
5174 | #define bfd_elf32_bfd_reloc_name_lookup csky_elf_reloc_name_lookup | |
5175 | #define elf_backend_ignore_discarded_relocs csky_elf_ignore_discarded_relocs | |
5176 | #define elf_backend_relocate_section csky_elf_relocate_section | |
5177 | #define elf_backend_check_relocs csky_elf_check_relocs | |
5178 | ||
5179 | /* Dynamic relocate related API. */ | |
5180 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections | |
5181 | #define elf_backend_adjust_dynamic_symbol csky_elf_adjust_dynamic_symbol | |
5182 | #define elf_backend_size_dynamic_sections csky_elf_size_dynamic_sections | |
5183 | #define elf_backend_finish_dynamic_symbol csky_elf_finish_dynamic_symbol | |
5184 | #define elf_backend_finish_dynamic_sections csky_elf_finish_dynamic_sections | |
5185 | #define elf_backend_rela_normal 1 | |
5186 | #define elf_backend_can_refcount 1 | |
5187 | #define elf_backend_plt_readonly 1 | |
5188 | #define elf_backend_want_got_sym 1 | |
5189 | #define elf_backend_want_dynrelro 1 | |
5190 | #define elf_backend_got_header_size 12 | |
5191 | #define elf_backend_want_got_plt 1 | |
5192 | ||
5193 | /* C-SKY coredump support. */ | |
5194 | #define elf_backend_grok_prstatus csky_elf_grok_prstatus | |
5195 | #define elf_backend_grok_psinfo csky_elf_grok_psinfo | |
5196 | ||
5197 | #include "elf32-target.h" |