/src/binutils-gdb/bfd/elf32-cr16.c
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1 | | /* BFD back-end for National Semiconductor's CR16 ELF |
2 | | Copyright (C) 2007-2025 Free Software Foundation, Inc. |
3 | | Written by M R Swami Reddy. |
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 Foundation, |
19 | | Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
20 | | |
21 | | #include "sysdep.h" |
22 | | #include "bfd.h" |
23 | | #include "bfdlink.h" |
24 | | #include "libbfd.h" |
25 | | #include "libiberty.h" |
26 | | #include "elf-bfd.h" |
27 | | #include "elf/cr16.h" |
28 | | #include "elf32-cr16.h" |
29 | | |
30 | | /* The cr16 linker needs to keep track of the number of relocs that |
31 | | it decides to copy in check_relocs for each symbol. This is so |
32 | | that it can discard PC relative relocs if it doesn't need them when |
33 | | linking with -Bsymbolic. We store the information in a field |
34 | | extending the regular ELF linker hash table. */ |
35 | | |
36 | | struct elf32_cr16_link_hash_entry |
37 | | { |
38 | | /* The basic elf link hash table entry. */ |
39 | | struct elf_link_hash_entry root; |
40 | | |
41 | | /* For function symbols, the number of times this function is |
42 | | called directly (ie by name). */ |
43 | | unsigned int direct_calls; |
44 | | |
45 | | /* For function symbols, the size of this function's stack |
46 | | (if <= 255 bytes). We stuff this into "call" instructions |
47 | | to this target when it's valid and profitable to do so. |
48 | | |
49 | | This does not include stack allocated by movm! */ |
50 | | unsigned char stack_size; |
51 | | |
52 | | /* For function symbols, arguments (if any) for movm instruction |
53 | | in the prologue. We stuff this value into "call" instructions |
54 | | to the target when it's valid and profitable to do so. */ |
55 | | unsigned char movm_args; |
56 | | |
57 | | /* For function symbols, the amount of stack space that would be allocated |
58 | | by the movm instruction. This is redundant with movm_args, but we |
59 | | add it to the hash table to avoid computing it over and over. */ |
60 | | unsigned char movm_stack_size; |
61 | | |
62 | | /* Used to mark functions which have had redundant parts of their |
63 | | prologue deleted. */ |
64 | | #define CR16_DELETED_PROLOGUE_BYTES 0x1 |
65 | | unsigned char flags; |
66 | | |
67 | | /* Calculated value. */ |
68 | | bfd_vma value; |
69 | | }; |
70 | | |
71 | | /* cr16_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */ |
72 | | |
73 | | struct cr16_reloc_map |
74 | | { |
75 | | bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */ |
76 | | unsigned short cr16_reloc_type; /* CR16 relocation type. */ |
77 | | }; |
78 | | |
79 | | static const struct cr16_reloc_map cr16_reloc_map[R_CR16_MAX] = |
80 | | { |
81 | | {BFD_RELOC_NONE, R_CR16_NONE}, |
82 | | {BFD_RELOC_CR16_NUM8, R_CR16_NUM8}, |
83 | | {BFD_RELOC_CR16_NUM16, R_CR16_NUM16}, |
84 | | {BFD_RELOC_CR16_NUM32, R_CR16_NUM32}, |
85 | | {BFD_RELOC_CR16_NUM32a, R_CR16_NUM32a}, |
86 | | {BFD_RELOC_CR16_REGREL4, R_CR16_REGREL4}, |
87 | | {BFD_RELOC_CR16_REGREL4a, R_CR16_REGREL4a}, |
88 | | {BFD_RELOC_CR16_REGREL14, R_CR16_REGREL14}, |
89 | | {BFD_RELOC_CR16_REGREL14a, R_CR16_REGREL14a}, |
90 | | {BFD_RELOC_CR16_REGREL16, R_CR16_REGREL16}, |
91 | | {BFD_RELOC_CR16_REGREL20, R_CR16_REGREL20}, |
92 | | {BFD_RELOC_CR16_REGREL20a, R_CR16_REGREL20a}, |
93 | | {BFD_RELOC_CR16_ABS20, R_CR16_ABS20}, |
94 | | {BFD_RELOC_CR16_ABS24, R_CR16_ABS24}, |
95 | | {BFD_RELOC_CR16_IMM4, R_CR16_IMM4}, |
96 | | {BFD_RELOC_CR16_IMM8, R_CR16_IMM8}, |
97 | | {BFD_RELOC_CR16_IMM16, R_CR16_IMM16}, |
98 | | {BFD_RELOC_CR16_IMM20, R_CR16_IMM20}, |
99 | | {BFD_RELOC_CR16_IMM24, R_CR16_IMM24}, |
100 | | {BFD_RELOC_CR16_IMM32, R_CR16_IMM32}, |
101 | | {BFD_RELOC_CR16_IMM32a, R_CR16_IMM32a}, |
102 | | {BFD_RELOC_CR16_DISP4, R_CR16_DISP4}, |
103 | | {BFD_RELOC_CR16_DISP8, R_CR16_DISP8}, |
104 | | {BFD_RELOC_CR16_DISP16, R_CR16_DISP16}, |
105 | | {BFD_RELOC_CR16_DISP24, R_CR16_DISP24}, |
106 | | {BFD_RELOC_CR16_DISP24a, R_CR16_DISP24a}, |
107 | | {BFD_RELOC_CR16_SWITCH8, R_CR16_SWITCH8}, |
108 | | {BFD_RELOC_CR16_SWITCH16, R_CR16_SWITCH16}, |
109 | | {BFD_RELOC_CR16_SWITCH32, R_CR16_SWITCH32}, |
110 | | {BFD_RELOC_CR16_GOT_REGREL20, R_CR16_GOT_REGREL20}, |
111 | | {BFD_RELOC_CR16_GOTC_REGREL20, R_CR16_GOTC_REGREL20}, |
112 | | {BFD_RELOC_CR16_GLOB_DAT, R_CR16_GLOB_DAT} |
113 | | }; |
114 | | |
115 | | static reloc_howto_type cr16_elf_howto_table[] = |
116 | | { |
117 | | HOWTO (R_CR16_NONE, /* type */ |
118 | | 0, /* rightshift */ |
119 | | 0, /* size */ |
120 | | 0, /* bitsize */ |
121 | | false, /* pc_relative */ |
122 | | 0, /* bitpos */ |
123 | | complain_overflow_dont, /* complain_on_overflow */ |
124 | | bfd_elf_generic_reloc, /* special_function */ |
125 | | "R_CR16_NONE", /* name */ |
126 | | false, /* partial_inplace */ |
127 | | 0, /* src_mask */ |
128 | | 0, /* dst_mask */ |
129 | | false), /* pcrel_offset */ |
130 | | |
131 | | HOWTO (R_CR16_NUM8, /* type */ |
132 | | 0, /* rightshift */ |
133 | | 1, /* size */ |
134 | | 8, /* bitsize */ |
135 | | false, /* pc_relative */ |
136 | | 0, /* bitpos */ |
137 | | complain_overflow_bitfield,/* complain_on_overflow */ |
138 | | bfd_elf_generic_reloc, /* special_function */ |
139 | | "R_CR16_NUM8", /* name */ |
140 | | false, /* partial_inplace */ |
141 | | 0x0, /* src_mask */ |
142 | | 0xff, /* dst_mask */ |
143 | | false), /* pcrel_offset */ |
144 | | |
145 | | HOWTO (R_CR16_NUM16, /* type */ |
146 | | 0, /* rightshift */ |
147 | | 2, /* size */ |
148 | | 16, /* bitsize */ |
149 | | false, /* pc_relative */ |
150 | | 0, /* bitpos */ |
151 | | complain_overflow_bitfield,/* complain_on_overflow */ |
152 | | bfd_elf_generic_reloc, /* special_function */ |
153 | | "R_CR16_NUM16", /* name */ |
154 | | false, /* partial_inplace */ |
155 | | 0x0, /* src_mask */ |
156 | | 0xffff, /* dst_mask */ |
157 | | false), /* pcrel_offset */ |
158 | | |
159 | | HOWTO (R_CR16_NUM32, /* type */ |
160 | | 0, /* rightshift */ |
161 | | 4, /* size */ |
162 | | 32, /* bitsize */ |
163 | | false, /* pc_relative */ |
164 | | 0, /* bitpos */ |
165 | | complain_overflow_bitfield,/* complain_on_overflow */ |
166 | | bfd_elf_generic_reloc, /* special_function */ |
167 | | "R_CR16_NUM32", /* name */ |
168 | | false, /* partial_inplace */ |
169 | | 0x0, /* src_mask */ |
170 | | 0xffffffff, /* dst_mask */ |
171 | | false), /* pcrel_offset */ |
172 | | |
173 | | HOWTO (R_CR16_NUM32a, /* type */ |
174 | | 1, /* rightshift */ |
175 | | 4, /* size */ |
176 | | 32, /* bitsize */ |
177 | | false, /* pc_relative */ |
178 | | 0, /* bitpos */ |
179 | | complain_overflow_bitfield,/* complain_on_overflow */ |
180 | | bfd_elf_generic_reloc, /* special_function */ |
181 | | "R_CR16_NUM32a", /* name */ |
182 | | false, /* partial_inplace */ |
183 | | 0x0, /* src_mask */ |
184 | | 0xffffffff, /* dst_mask */ |
185 | | false), /* pcrel_offset */ |
186 | | |
187 | | HOWTO (R_CR16_REGREL4, /* type */ |
188 | | 0, /* rightshift */ |
189 | | 1, /* size */ |
190 | | 4, /* bitsize */ |
191 | | false, /* pc_relative */ |
192 | | 0, /* bitpos */ |
193 | | complain_overflow_bitfield,/* complain_on_overflow */ |
194 | | bfd_elf_generic_reloc, /* special_function */ |
195 | | "R_CR16_REGREL4", /* name */ |
196 | | false, /* partial_inplace */ |
197 | | 0x0, /* src_mask */ |
198 | | 0xf, /* dst_mask */ |
199 | | false), /* pcrel_offset */ |
200 | | |
201 | | HOWTO (R_CR16_REGREL4a, /* type */ |
202 | | 0, /* rightshift */ |
203 | | 1, /* size */ |
204 | | 4, /* bitsize */ |
205 | | false, /* pc_relative */ |
206 | | 0, /* bitpos */ |
207 | | complain_overflow_bitfield,/* complain_on_overflow */ |
208 | | bfd_elf_generic_reloc, /* special_function */ |
209 | | "R_CR16_REGREL4a", /* name */ |
210 | | false, /* partial_inplace */ |
211 | | 0x0, /* src_mask */ |
212 | | 0xf, /* dst_mask */ |
213 | | false), /* pcrel_offset */ |
214 | | |
215 | | HOWTO (R_CR16_REGREL14, /* type */ |
216 | | 0, /* rightshift */ |
217 | | 2, /* size */ |
218 | | 14, /* bitsize */ |
219 | | false, /* pc_relative */ |
220 | | 0, /* bitpos */ |
221 | | complain_overflow_bitfield,/* complain_on_overflow */ |
222 | | bfd_elf_generic_reloc, /* special_function */ |
223 | | "R_CR16_REGREL14", /* name */ |
224 | | false, /* partial_inplace */ |
225 | | 0x0, /* src_mask */ |
226 | | 0x3fff, /* dst_mask */ |
227 | | false), /* pcrel_offset */ |
228 | | |
229 | | HOWTO (R_CR16_REGREL14a, /* type */ |
230 | | 0, /* rightshift */ |
231 | | 2, /* size */ |
232 | | 14, /* bitsize */ |
233 | | false, /* pc_relative */ |
234 | | 0, /* bitpos */ |
235 | | complain_overflow_bitfield,/* complain_on_overflow */ |
236 | | bfd_elf_generic_reloc, /* special_function */ |
237 | | "R_CR16_REGREL14a", /* name */ |
238 | | false, /* partial_inplace */ |
239 | | 0x0, /* src_mask */ |
240 | | 0x3fff, /* dst_mask */ |
241 | | false), /* pcrel_offset */ |
242 | | |
243 | | HOWTO (R_CR16_REGREL16, /* type */ |
244 | | 0, /* rightshift */ |
245 | | 2, /* size */ |
246 | | 16, /* bitsize */ |
247 | | false, /* pc_relative */ |
248 | | 0, /* bitpos */ |
249 | | complain_overflow_bitfield,/* complain_on_overflow */ |
250 | | bfd_elf_generic_reloc, /* special_function */ |
251 | | "R_CR16_REGREL16", /* name */ |
252 | | false, /* partial_inplace */ |
253 | | 0x0, /* src_mask */ |
254 | | 0xffff, /* dst_mask */ |
255 | | false), /* pcrel_offset */ |
256 | | |
257 | | HOWTO (R_CR16_REGREL20, /* type */ |
258 | | 0, /* rightshift */ |
259 | | 4, /* size */ |
260 | | 20, /* bitsize */ |
261 | | false, /* pc_relative */ |
262 | | 0, /* bitpos */ |
263 | | complain_overflow_bitfield,/* complain_on_overflow */ |
264 | | bfd_elf_generic_reloc, /* special_function */ |
265 | | "R_CR16_REGREL20", /* name */ |
266 | | false, /* partial_inplace */ |
267 | | 0x0, /* src_mask */ |
268 | | 0xfffff, /* dst_mask */ |
269 | | false), /* pcrel_offset */ |
270 | | |
271 | | HOWTO (R_CR16_REGREL20a, /* type */ |
272 | | 0, /* rightshift */ |
273 | | 4, /* size */ |
274 | | 20, /* bitsize */ |
275 | | false, /* pc_relative */ |
276 | | 0, /* bitpos */ |
277 | | complain_overflow_bitfield,/* complain_on_overflow */ |
278 | | bfd_elf_generic_reloc, /* special_function */ |
279 | | "R_CR16_REGREL20a", /* name */ |
280 | | false, /* partial_inplace */ |
281 | | 0x0, /* src_mask */ |
282 | | 0xfffff, /* dst_mask */ |
283 | | false), /* pcrel_offset */ |
284 | | |
285 | | HOWTO (R_CR16_ABS20, /* type */ |
286 | | 0, /* rightshift */ |
287 | | 4, /* size */ |
288 | | 20, /* bitsize */ |
289 | | false, /* pc_relative */ |
290 | | 0, /* bitpos */ |
291 | | complain_overflow_bitfield,/* complain_on_overflow */ |
292 | | bfd_elf_generic_reloc, /* special_function */ |
293 | | "R_CR16_ABS20", /* name */ |
294 | | false, /* partial_inplace */ |
295 | | 0x0, /* src_mask */ |
296 | | 0xfffff, /* dst_mask */ |
297 | | false), /* pcrel_offset */ |
298 | | |
299 | | HOWTO (R_CR16_ABS24, /* type */ |
300 | | 0, /* rightshift */ |
301 | | 4, /* size */ |
302 | | 24, /* bitsize */ |
303 | | false, /* pc_relative */ |
304 | | 0, /* bitpos */ |
305 | | complain_overflow_bitfield,/* complain_on_overflow */ |
306 | | bfd_elf_generic_reloc, /* special_function */ |
307 | | "R_CR16_ABS24", /* name */ |
308 | | false, /* partial_inplace */ |
309 | | 0x0, /* src_mask */ |
310 | | 0xffffff, /* dst_mask */ |
311 | | false), /* pcrel_offset */ |
312 | | |
313 | | HOWTO (R_CR16_IMM4, /* type */ |
314 | | 0, /* rightshift */ |
315 | | 1, /* size */ |
316 | | 4, /* bitsize */ |
317 | | false, /* pc_relative */ |
318 | | 0, /* bitpos */ |
319 | | complain_overflow_bitfield,/* complain_on_overflow */ |
320 | | bfd_elf_generic_reloc, /* special_function */ |
321 | | "R_CR16_IMM4", /* name */ |
322 | | false, /* partial_inplace */ |
323 | | 0x0, /* src_mask */ |
324 | | 0xf, /* dst_mask */ |
325 | | false), /* pcrel_offset */ |
326 | | |
327 | | HOWTO (R_CR16_IMM8, /* type */ |
328 | | 0, /* rightshift */ |
329 | | 1, /* size */ |
330 | | 8, /* bitsize */ |
331 | | false, /* pc_relative */ |
332 | | 0, /* bitpos */ |
333 | | complain_overflow_bitfield,/* complain_on_overflow */ |
334 | | bfd_elf_generic_reloc, /* special_function */ |
335 | | "R_CR16_IMM8", /* name */ |
336 | | false, /* partial_inplace */ |
337 | | 0x0, /* src_mask */ |
338 | | 0xff, /* dst_mask */ |
339 | | false), /* pcrel_offset */ |
340 | | |
341 | | HOWTO (R_CR16_IMM16, /* type */ |
342 | | 0, /* rightshift */ |
343 | | 2, /* size */ |
344 | | 16, /* bitsize */ |
345 | | false, /* pc_relative */ |
346 | | 0, /* bitpos */ |
347 | | complain_overflow_bitfield,/* complain_on_overflow */ |
348 | | bfd_elf_generic_reloc, /* special_function */ |
349 | | "R_CR16_IMM16", /* name */ |
350 | | false, /* partial_inplace */ |
351 | | 0x0, /* src_mask */ |
352 | | 0xffff, /* dst_mask */ |
353 | | false), /* pcrel_offset */ |
354 | | |
355 | | HOWTO (R_CR16_IMM20, /* type */ |
356 | | 0, /* rightshift */ |
357 | | 4, /* size */ |
358 | | 20, /* bitsize */ |
359 | | false, /* pc_relative */ |
360 | | 0, /* bitpos */ |
361 | | complain_overflow_bitfield,/* complain_on_overflow */ |
362 | | bfd_elf_generic_reloc, /* special_function */ |
363 | | "R_CR16_IMM20", /* name */ |
364 | | false, /* partial_inplace */ |
365 | | 0x0, /* src_mask */ |
366 | | 0xfffff, /* dst_mask */ |
367 | | false), /* pcrel_offset */ |
368 | | |
369 | | HOWTO (R_CR16_IMM24, /* type */ |
370 | | 0, /* rightshift */ |
371 | | 4, /* size */ |
372 | | 24, /* bitsize */ |
373 | | false, /* pc_relative */ |
374 | | 0, /* bitpos */ |
375 | | complain_overflow_bitfield,/* complain_on_overflow */ |
376 | | bfd_elf_generic_reloc, /* special_function */ |
377 | | "R_CR16_IMM24", /* name */ |
378 | | false, /* partial_inplace */ |
379 | | 0x0, /* src_mask */ |
380 | | 0xffffff, /* dst_mask */ |
381 | | false), /* pcrel_offset */ |
382 | | |
383 | | HOWTO (R_CR16_IMM32, /* type */ |
384 | | 0, /* rightshift */ |
385 | | 4, /* size */ |
386 | | 32, /* bitsize */ |
387 | | false, /* pc_relative */ |
388 | | 0, /* bitpos */ |
389 | | complain_overflow_bitfield,/* complain_on_overflow */ |
390 | | bfd_elf_generic_reloc, /* special_function */ |
391 | | "R_CR16_IMM32", /* name */ |
392 | | false, /* partial_inplace */ |
393 | | 0x0, /* src_mask */ |
394 | | 0xffffffff, /* dst_mask */ |
395 | | false), /* pcrel_offset */ |
396 | | |
397 | | HOWTO (R_CR16_IMM32a, /* type */ |
398 | | 1, /* rightshift */ |
399 | | 4, /* size */ |
400 | | 32, /* bitsize */ |
401 | | false, /* pc_relative */ |
402 | | 0, /* bitpos */ |
403 | | complain_overflow_bitfield,/* complain_on_overflow */ |
404 | | bfd_elf_generic_reloc, /* special_function */ |
405 | | "R_CR16_IMM32a", /* name */ |
406 | | false, /* partial_inplace */ |
407 | | 0x0, /* src_mask */ |
408 | | 0xffffffff, /* dst_mask */ |
409 | | false), /* pcrel_offset */ |
410 | | |
411 | | HOWTO (R_CR16_DISP4, /* type */ |
412 | | 1, /* rightshift */ |
413 | | 1, /* size */ |
414 | | 4, /* bitsize */ |
415 | | true, /* pc_relative */ |
416 | | 0, /* bitpos */ |
417 | | complain_overflow_unsigned, /* complain_on_overflow */ |
418 | | bfd_elf_generic_reloc, /* special_function */ |
419 | | "R_CR16_DISP4", /* name */ |
420 | | false, /* partial_inplace */ |
421 | | 0x0, /* src_mask */ |
422 | | 0xf, /* dst_mask */ |
423 | | false), /* pcrel_offset */ |
424 | | |
425 | | HOWTO (R_CR16_DISP8, /* type */ |
426 | | 1, /* rightshift */ |
427 | | 1, /* size */ |
428 | | 8, /* bitsize */ |
429 | | true, /* pc_relative */ |
430 | | 0, /* bitpos */ |
431 | | complain_overflow_unsigned, /* complain_on_overflow */ |
432 | | bfd_elf_generic_reloc, /* special_function */ |
433 | | "R_CR16_DISP8", /* name */ |
434 | | false, /* partial_inplace */ |
435 | | 0x0, /* src_mask */ |
436 | | 0x1ff, /* dst_mask */ |
437 | | false), /* pcrel_offset */ |
438 | | |
439 | | HOWTO (R_CR16_DISP16, /* type */ |
440 | | 0, /* rightshift REVIITS: To sync with WinIDEA*/ |
441 | | 2, /* size */ |
442 | | 16, /* bitsize */ |
443 | | true, /* pc_relative */ |
444 | | 0, /* bitpos */ |
445 | | complain_overflow_unsigned, /* complain_on_overflow */ |
446 | | bfd_elf_generic_reloc, /* special_function */ |
447 | | "R_CR16_DISP16", /* name */ |
448 | | false, /* partial_inplace */ |
449 | | 0x0, /* src_mask */ |
450 | | 0x1ffff, /* dst_mask */ |
451 | | false), /* pcrel_offset */ |
452 | | /* REVISIT: DISP24 should be left-shift by 2 as per ISA doc |
453 | | but its not done, to sync with WinIDEA and CR16 4.1 tools */ |
454 | | HOWTO (R_CR16_DISP24, /* type */ |
455 | | 0, /* rightshift */ |
456 | | 4, /* size */ |
457 | | 24, /* bitsize */ |
458 | | true, /* pc_relative */ |
459 | | 0, /* bitpos */ |
460 | | complain_overflow_unsigned, /* complain_on_overflow */ |
461 | | bfd_elf_generic_reloc, /* special_function */ |
462 | | "R_CR16_DISP24", /* name */ |
463 | | false, /* partial_inplace */ |
464 | | 0x0, /* src_mask */ |
465 | | 0x1ffffff, /* dst_mask */ |
466 | | false), /* pcrel_offset */ |
467 | | |
468 | | HOWTO (R_CR16_DISP24a, /* type */ |
469 | | 0, /* rightshift */ |
470 | | 4, /* size */ |
471 | | 24, /* bitsize */ |
472 | | true, /* pc_relative */ |
473 | | 0, /* bitpos */ |
474 | | complain_overflow_unsigned, /* complain_on_overflow */ |
475 | | bfd_elf_generic_reloc, /* special_function */ |
476 | | "R_CR16_DISP24a", /* name */ |
477 | | false, /* partial_inplace */ |
478 | | 0x0, /* src_mask */ |
479 | | 0xffffff, /* dst_mask */ |
480 | | false), /* pcrel_offset */ |
481 | | |
482 | | /* An 8 bit switch table entry. This is generated for an expression |
483 | | such as ``.byte L1 - L2''. The offset holds the difference |
484 | | between the reloc address and L2. */ |
485 | | HOWTO (R_CR16_SWITCH8, /* type */ |
486 | | 0, /* rightshift */ |
487 | | 1, /* size */ |
488 | | 8, /* bitsize */ |
489 | | false, /* pc_relative */ |
490 | | 0, /* bitpos */ |
491 | | complain_overflow_unsigned, /* complain_on_overflow */ |
492 | | bfd_elf_generic_reloc, /* special_function */ |
493 | | "R_CR16_SWITCH8", /* name */ |
494 | | false, /* partial_inplace */ |
495 | | 0x0, /* src_mask */ |
496 | | 0xff, /* dst_mask */ |
497 | | true), /* pcrel_offset */ |
498 | | |
499 | | /* A 16 bit switch table entry. This is generated for an expression |
500 | | such as ``.word L1 - L2''. The offset holds the difference |
501 | | between the reloc address and L2. */ |
502 | | HOWTO (R_CR16_SWITCH16, /* type */ |
503 | | 0, /* rightshift */ |
504 | | 2, /* size */ |
505 | | 16, /* bitsize */ |
506 | | false, /* pc_relative */ |
507 | | 0, /* bitpos */ |
508 | | complain_overflow_unsigned, /* complain_on_overflow */ |
509 | | bfd_elf_generic_reloc, /* special_function */ |
510 | | "R_CR16_SWITCH16", /* name */ |
511 | | false, /* partial_inplace */ |
512 | | 0x0, /* src_mask */ |
513 | | 0xffff, /* dst_mask */ |
514 | | true), /* pcrel_offset */ |
515 | | |
516 | | /* A 32 bit switch table entry. This is generated for an expression |
517 | | such as ``.long L1 - L2''. The offset holds the difference |
518 | | between the reloc address and L2. */ |
519 | | HOWTO (R_CR16_SWITCH32, /* type */ |
520 | | 0, /* rightshift */ |
521 | | 4, /* size */ |
522 | | 32, /* bitsize */ |
523 | | false, /* pc_relative */ |
524 | | 0, /* bitpos */ |
525 | | complain_overflow_unsigned, /* complain_on_overflow */ |
526 | | bfd_elf_generic_reloc, /* special_function */ |
527 | | "R_CR16_SWITCH32", /* name */ |
528 | | false, /* partial_inplace */ |
529 | | 0x0, /* src_mask */ |
530 | | 0xffffffff, /* dst_mask */ |
531 | | true), /* pcrel_offset */ |
532 | | |
533 | | HOWTO (R_CR16_GOT_REGREL20, /* type */ |
534 | | 0, /* rightshift */ |
535 | | 4, /* size */ |
536 | | 20, /* bitsize */ |
537 | | false, /* pc_relative */ |
538 | | 0, /* bitpos */ |
539 | | complain_overflow_bitfield,/* complain_on_overflow */ |
540 | | bfd_elf_generic_reloc, /* special_function */ |
541 | | "R_CR16_GOT_REGREL20", /* name */ |
542 | | true, /* partial_inplace */ |
543 | | 0x0, /* src_mask */ |
544 | | 0xfffff, /* dst_mask */ |
545 | | false), /* pcrel_offset */ |
546 | | |
547 | | HOWTO (R_CR16_GOTC_REGREL20, /* type */ |
548 | | 0, /* rightshift */ |
549 | | 4, /* size */ |
550 | | 20, /* bitsize */ |
551 | | false, /* pc_relative */ |
552 | | 0, /* bitpos */ |
553 | | complain_overflow_bitfield,/* complain_on_overflow */ |
554 | | bfd_elf_generic_reloc, /* special_function */ |
555 | | "R_CR16_GOTC_REGREL20", /* name */ |
556 | | true, /* partial_inplace */ |
557 | | 0x0, /* src_mask */ |
558 | | 0xfffff, /* dst_mask */ |
559 | | false), /* pcrel_offset */ |
560 | | |
561 | | HOWTO (R_CR16_GLOB_DAT, /* type */ |
562 | | 0, /* rightshift */ |
563 | | 4, /* size */ |
564 | | 32, /* bitsize */ |
565 | | false, /* pc_relative */ |
566 | | 0, /* bitpos */ |
567 | | complain_overflow_unsigned, /* complain_on_overflow */ |
568 | | bfd_elf_generic_reloc, /* special_function */ |
569 | | "R_CR16_GLOB_DAT", /* name */ |
570 | | false, /* partial_inplace */ |
571 | | 0x0, /* src_mask */ |
572 | | 0xffffffff, /* dst_mask */ |
573 | | true) /* pcrel_offset */ |
574 | | }; |
575 | | |
576 | | |
577 | | /* Create the GOT section. */ |
578 | | |
579 | | static bool |
580 | | _bfd_cr16_elf_create_got_section (bfd * abfd, struct bfd_link_info * info) |
581 | 0 | { |
582 | 0 | flagword flags; |
583 | 0 | asection * s; |
584 | 0 | struct elf_link_hash_entry * h; |
585 | 0 | const struct elf_backend_data * bed = get_elf_backend_data (abfd); |
586 | 0 | struct elf_link_hash_table *htab = elf_hash_table (info); |
587 | 0 | int ptralign; |
588 | | |
589 | | /* This function may be called more than once. */ |
590 | 0 | if (htab->sgot != NULL) |
591 | 0 | return true; |
592 | | |
593 | 0 | switch (bed->s->arch_size) |
594 | 0 | { |
595 | 0 | case 16: |
596 | 0 | ptralign = 1; |
597 | 0 | break; |
598 | | |
599 | 0 | case 32: |
600 | 0 | ptralign = 2; |
601 | 0 | break; |
602 | | |
603 | 0 | default: |
604 | 0 | bfd_set_error (bfd_error_bad_value); |
605 | 0 | return false; |
606 | 0 | } |
607 | | |
608 | 0 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
609 | 0 | | SEC_LINKER_CREATED); |
610 | |
|
611 | 0 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
612 | 0 | htab->sgot= s; |
613 | 0 | if (s == NULL |
614 | 0 | || !bfd_set_section_alignment (s, ptralign)) |
615 | 0 | return false; |
616 | | |
617 | 0 | if (bed->want_got_plt) |
618 | 0 | { |
619 | 0 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
620 | 0 | htab->sgotplt = s; |
621 | 0 | if (s == NULL |
622 | 0 | || !bfd_set_section_alignment (s, ptralign)) |
623 | 0 | return false; |
624 | 0 | } |
625 | | |
626 | | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got |
627 | | (or .got.plt) section. We don't do this in the linker script |
628 | | because we don't want to define the symbol if we are not creating |
629 | | a global offset table. */ |
630 | 0 | h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_"); |
631 | 0 | htab->hgot = h; |
632 | 0 | if (h == NULL) |
633 | 0 | return false; |
634 | | |
635 | | /* The first bit of the global offset table is the header. */ |
636 | 0 | s->size += bed->got_header_size; |
637 | |
|
638 | 0 | return true; |
639 | 0 | } |
640 | | |
641 | | |
642 | | /* Retrieve a howto ptr using a BFD reloc_code. */ |
643 | | |
644 | | static reloc_howto_type * |
645 | | elf_cr16_reloc_type_lookup (bfd *abfd, |
646 | | bfd_reloc_code_real_type code) |
647 | 0 | { |
648 | 0 | unsigned int i; |
649 | |
|
650 | 0 | for (i = 0; i < R_CR16_MAX; i++) |
651 | 0 | if (code == cr16_reloc_map[i].bfd_reloc_enum) |
652 | 0 | return &cr16_elf_howto_table[cr16_reloc_map[i].cr16_reloc_type]; |
653 | | |
654 | 0 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
655 | 0 | abfd, code); |
656 | 0 | return NULL; |
657 | 0 | } |
658 | | |
659 | | static reloc_howto_type * |
660 | | elf_cr16_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
661 | | const char *r_name) |
662 | 0 | { |
663 | 0 | unsigned int i; |
664 | |
|
665 | 0 | for (i = 0; ARRAY_SIZE (cr16_elf_howto_table); i++) |
666 | 0 | if (cr16_elf_howto_table[i].name != NULL |
667 | 0 | && strcasecmp (cr16_elf_howto_table[i].name, r_name) == 0) |
668 | 0 | return cr16_elf_howto_table + i; |
669 | | |
670 | 0 | return NULL; |
671 | 0 | } |
672 | | |
673 | | /* Retrieve a howto ptr using an internal relocation entry. */ |
674 | | |
675 | | static bool |
676 | | elf_cr16_info_to_howto (bfd *abfd, arelent *cache_ptr, |
677 | | Elf_Internal_Rela *dst) |
678 | 70 | { |
679 | 70 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); |
680 | | |
681 | 70 | if (r_type >= R_CR16_MAX) |
682 | 6 | { |
683 | | /* xgettext:c-format */ |
684 | 6 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
685 | 6 | abfd, r_type); |
686 | 6 | bfd_set_error (bfd_error_bad_value); |
687 | 6 | return false; |
688 | 6 | } |
689 | 64 | cache_ptr->howto = cr16_elf_howto_table + r_type; |
690 | 64 | return true; |
691 | 70 | } |
692 | | |
693 | | /* Look through the relocs for a section during the first phase. |
694 | | Since we don't do .gots or .plts, we just need to consider the |
695 | | virtual table relocs for gc. */ |
696 | | |
697 | | static bool |
698 | | cr16_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec, |
699 | | const Elf_Internal_Rela *relocs) |
700 | 0 | { |
701 | 0 | Elf_Internal_Shdr *symtab_hdr; |
702 | 0 | Elf_Internal_Sym * isymbuf = NULL; |
703 | 0 | struct elf_link_hash_entry **sym_hashes; |
704 | 0 | const Elf_Internal_Rela *rel; |
705 | 0 | const Elf_Internal_Rela *rel_end; |
706 | 0 | bfd * dynobj; |
707 | 0 | bfd_vma * local_got_offsets; |
708 | 0 | asection * sgot; |
709 | 0 | asection * srelgot; |
710 | |
|
711 | 0 | sgot = NULL; |
712 | 0 | srelgot = NULL; |
713 | 0 | bool result = false; |
714 | |
|
715 | 0 | if (bfd_link_relocatable (info)) |
716 | 0 | return true; |
717 | | |
718 | 0 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
719 | 0 | sym_hashes = elf_sym_hashes (abfd); |
720 | |
|
721 | 0 | dynobj = elf_hash_table (info)->dynobj; |
722 | 0 | local_got_offsets = elf_local_got_offsets (abfd); |
723 | 0 | rel_end = relocs + sec->reloc_count; |
724 | 0 | for (rel = relocs; rel < rel_end; rel++) |
725 | 0 | { |
726 | 0 | struct elf_link_hash_entry *h; |
727 | 0 | unsigned long r_symndx; |
728 | |
|
729 | 0 | r_symndx = ELF32_R_SYM (rel->r_info); |
730 | 0 | if (r_symndx < symtab_hdr->sh_info) |
731 | 0 | h = NULL; |
732 | 0 | else |
733 | 0 | { |
734 | 0 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
735 | 0 | while (h->root.type == bfd_link_hash_indirect |
736 | 0 | || h->root.type == bfd_link_hash_warning) |
737 | 0 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
738 | 0 | } |
739 | | |
740 | | /* Some relocs require a global offset table. */ |
741 | 0 | if (dynobj == NULL) |
742 | 0 | { |
743 | 0 | switch (ELF32_R_TYPE (rel->r_info)) |
744 | 0 | { |
745 | 0 | case R_CR16_GOT_REGREL20: |
746 | 0 | case R_CR16_GOTC_REGREL20: |
747 | 0 | elf_hash_table (info)->dynobj = dynobj = abfd; |
748 | 0 | if (! _bfd_cr16_elf_create_got_section (dynobj, info)) |
749 | 0 | goto fail; |
750 | 0 | break; |
751 | | |
752 | 0 | default: |
753 | 0 | break; |
754 | 0 | } |
755 | 0 | } |
756 | | |
757 | 0 | switch (ELF32_R_TYPE (rel->r_info)) |
758 | 0 | { |
759 | 0 | case R_CR16_GOT_REGREL20: |
760 | 0 | case R_CR16_GOTC_REGREL20: |
761 | | /* This symbol requires a global offset table entry. */ |
762 | |
|
763 | 0 | sgot = elf_hash_table (info)->sgot; |
764 | 0 | srelgot = elf_hash_table (info)->srelgot; |
765 | 0 | BFD_ASSERT (sgot != NULL && srelgot != NULL); |
766 | |
|
767 | 0 | if (h != NULL) |
768 | 0 | { |
769 | 0 | if (h->got.offset != (bfd_vma) -1) |
770 | | /* We have already allocated space in the .got. */ |
771 | 0 | break; |
772 | | |
773 | 0 | h->got.offset = sgot->size; |
774 | | |
775 | | /* Make sure this symbol is output as a dynamic symbol. */ |
776 | 0 | if (h->dynindx == -1) |
777 | 0 | { |
778 | 0 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
779 | 0 | goto fail; |
780 | 0 | } |
781 | | |
782 | 0 | srelgot->size += sizeof (Elf32_External_Rela); |
783 | 0 | } |
784 | 0 | else |
785 | 0 | { |
786 | | /* This is a global offset table entry for a local |
787 | | symbol. */ |
788 | 0 | if (local_got_offsets == NULL) |
789 | 0 | { |
790 | 0 | size_t size; |
791 | 0 | unsigned int i; |
792 | |
|
793 | 0 | size = symtab_hdr->sh_info * sizeof (bfd_vma); |
794 | 0 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); |
795 | |
|
796 | 0 | if (local_got_offsets == NULL) |
797 | 0 | goto fail; |
798 | | |
799 | 0 | elf_local_got_offsets (abfd) = local_got_offsets; |
800 | |
|
801 | 0 | for (i = 0; i < symtab_hdr->sh_info; i++) |
802 | 0 | local_got_offsets[i] = (bfd_vma) -1; |
803 | 0 | } |
804 | | |
805 | 0 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) |
806 | | /* We have already allocated space in the .got. */ |
807 | 0 | break; |
808 | | |
809 | 0 | local_got_offsets[r_symndx] = sgot->size; |
810 | |
|
811 | 0 | if (bfd_link_executable (info)) |
812 | | /* If we are generating a shared object, we need to |
813 | | output a R_CR16_RELATIVE reloc so that the dynamic |
814 | | linker can adjust this GOT entry. */ |
815 | 0 | srelgot->size += sizeof (Elf32_External_Rela); |
816 | 0 | } |
817 | | |
818 | 0 | sgot->size += 4; |
819 | 0 | break; |
820 | |
|
821 | 0 | } |
822 | 0 | } |
823 | | |
824 | 0 | result = true; |
825 | 0 | fail: |
826 | 0 | free (isymbuf); |
827 | |
|
828 | 0 | return result; |
829 | 0 | } |
830 | | |
831 | | /* Perform a relocation as part of a final link. */ |
832 | | |
833 | | static bfd_reloc_status_type |
834 | | cr16_elf_final_link_relocate (reloc_howto_type *howto, |
835 | | bfd *input_bfd, |
836 | | bfd *output_bfd ATTRIBUTE_UNUSED, |
837 | | asection *input_section, |
838 | | bfd_byte *contents, |
839 | | bfd_vma offset, |
840 | | bfd_vma Rvalue, |
841 | | bfd_vma addend, |
842 | | struct elf_link_hash_entry * h, |
843 | | unsigned long symndx ATTRIBUTE_UNUSED, |
844 | | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
845 | | asection *sec ATTRIBUTE_UNUSED, |
846 | | int is_local ATTRIBUTE_UNUSED) |
847 | 0 | { |
848 | 0 | unsigned short r_type = howto->type; |
849 | 0 | bfd_byte *hit_data = contents + offset; |
850 | 0 | bfd_vma reloc_bits, check, Rvalue1; |
851 | |
|
852 | 0 | switch (r_type) |
853 | 0 | { |
854 | 0 | case R_CR16_IMM4: |
855 | 0 | case R_CR16_IMM20: |
856 | 0 | case R_CR16_ABS20: |
857 | 0 | break; |
858 | | |
859 | 0 | case R_CR16_IMM8: |
860 | 0 | case R_CR16_IMM16: |
861 | 0 | case R_CR16_IMM32: |
862 | 0 | case R_CR16_IMM32a: |
863 | 0 | case R_CR16_REGREL4: |
864 | 0 | case R_CR16_REGREL4a: |
865 | 0 | case R_CR16_REGREL14: |
866 | 0 | case R_CR16_REGREL14a: |
867 | 0 | case R_CR16_REGREL16: |
868 | 0 | case R_CR16_REGREL20: |
869 | 0 | case R_CR16_REGREL20a: |
870 | 0 | case R_CR16_GOT_REGREL20: |
871 | 0 | case R_CR16_GOTC_REGREL20: |
872 | 0 | case R_CR16_ABS24: |
873 | 0 | case R_CR16_DISP16: |
874 | 0 | case R_CR16_DISP24: |
875 | | /* 'hit_data' is relative to the start of the instruction, not the |
876 | | relocation offset. Advance it to account for the exact offset. */ |
877 | 0 | hit_data += 2; |
878 | 0 | break; |
879 | | |
880 | 0 | case R_CR16_NONE: |
881 | 0 | return bfd_reloc_ok; |
882 | 0 | break; |
883 | | |
884 | 0 | case R_CR16_DISP4: |
885 | 0 | if (is_local) |
886 | 0 | Rvalue += -1; |
887 | 0 | break; |
888 | | |
889 | 0 | case R_CR16_DISP8: |
890 | 0 | case R_CR16_DISP24a: |
891 | 0 | if (is_local) |
892 | 0 | Rvalue -= -1; |
893 | 0 | break; |
894 | | |
895 | 0 | case R_CR16_SWITCH8: |
896 | 0 | case R_CR16_SWITCH16: |
897 | 0 | case R_CR16_SWITCH32: |
898 | | /* We only care about the addend, where the difference between |
899 | | expressions is kept. */ |
900 | 0 | Rvalue = 0; |
901 | |
|
902 | 0 | default: |
903 | 0 | break; |
904 | 0 | } |
905 | | |
906 | 0 | if (howto->pc_relative) |
907 | 0 | { |
908 | | /* Subtract the address of the section containing the location. */ |
909 | 0 | Rvalue -= (input_section->output_section->vma |
910 | 0 | + input_section->output_offset); |
911 | | /* Subtract the position of the location within the section. */ |
912 | 0 | Rvalue -= offset; |
913 | 0 | } |
914 | | |
915 | | /* Add in supplied addend. */ |
916 | 0 | Rvalue += addend; |
917 | | |
918 | | /* Complain if the bitfield overflows, whether it is considered |
919 | | as signed or unsigned. */ |
920 | 0 | check = Rvalue >> howto->rightshift; |
921 | |
|
922 | 0 | reloc_bits = ((bfd_vma) 1 << (howto->bitsize - 1) << 1) - 1; |
923 | | |
924 | | /* For GOT and GOTC relocs no boundary checks applied. */ |
925 | 0 | if (!((r_type == R_CR16_GOT_REGREL20) |
926 | 0 | || (r_type == R_CR16_GOTC_REGREL20))) |
927 | 0 | { |
928 | 0 | if (((bfd_vma) check & ~reloc_bits) != 0 |
929 | 0 | && (((bfd_vma) check & ~reloc_bits) |
930 | 0 | != (-(bfd_vma) 1 & ~reloc_bits))) |
931 | 0 | { |
932 | | /* The above right shift is incorrect for a signed |
933 | | value. See if turning on the upper bits fixes the |
934 | | overflow. */ |
935 | 0 | if (howto->rightshift && (bfd_signed_vma) Rvalue < 0) |
936 | 0 | { |
937 | 0 | check |= ((bfd_vma) -1 |
938 | 0 | & ~((bfd_vma) -1 >> howto->rightshift)); |
939 | |
|
940 | 0 | if (((bfd_vma) check & ~reloc_bits) |
941 | 0 | != (-(bfd_vma) 1 & ~reloc_bits)) |
942 | 0 | return bfd_reloc_overflow; |
943 | 0 | } |
944 | 0 | else |
945 | 0 | return bfd_reloc_overflow; |
946 | 0 | } |
947 | | |
948 | | /* Drop unwanted bits from the value we are relocating to. */ |
949 | 0 | Rvalue >>= (bfd_vma) howto->rightshift; |
950 | | |
951 | | /* Apply dst_mask to select only relocatable part of the insn. */ |
952 | 0 | Rvalue &= howto->dst_mask; |
953 | 0 | } |
954 | | |
955 | 0 | switch (bfd_get_reloc_size (howto)) |
956 | 0 | { |
957 | 0 | case 1: |
958 | 0 | if (r_type == R_CR16_DISP8) |
959 | 0 | { |
960 | 0 | Rvalue1 = bfd_get_16 (input_bfd, hit_data); |
961 | 0 | Rvalue = ((Rvalue1 & 0xf000) | ((Rvalue << 4) & 0xf00) |
962 | 0 | | (Rvalue1 & 0x00f0) | (Rvalue & 0xf)); |
963 | 0 | bfd_put_16 (input_bfd, Rvalue, hit_data); |
964 | 0 | } |
965 | 0 | else if (r_type == R_CR16_IMM4) |
966 | 0 | { |
967 | 0 | Rvalue1 = bfd_get_16 (input_bfd, hit_data); |
968 | 0 | Rvalue = (((Rvalue1 & 0xff) << 8) | ((Rvalue << 4) & 0xf0) |
969 | 0 | | ((Rvalue1 & 0x0f00) >> 8)); |
970 | 0 | bfd_put_16 (input_bfd, Rvalue, hit_data); |
971 | 0 | } |
972 | 0 | else if (r_type == R_CR16_DISP4) |
973 | 0 | { |
974 | 0 | Rvalue1 = bfd_get_16 (input_bfd, hit_data); |
975 | 0 | Rvalue = (Rvalue1 | ((Rvalue & 0xf) << 4)); |
976 | 0 | bfd_put_16 (input_bfd, Rvalue, hit_data); |
977 | 0 | } |
978 | 0 | else |
979 | 0 | { |
980 | 0 | bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data); |
981 | 0 | } |
982 | 0 | break; |
983 | | |
984 | 0 | case 2: |
985 | 0 | if (r_type == R_CR16_DISP16) |
986 | 0 | { |
987 | 0 | Rvalue |= (bfd_get_16 (input_bfd, hit_data)); |
988 | 0 | Rvalue = ((Rvalue & 0xfffe) | ((Rvalue >> 16) & 0x1)); |
989 | 0 | } |
990 | 0 | if (r_type == R_CR16_IMM16) |
991 | 0 | { |
992 | 0 | Rvalue1 = bfd_get_16 (input_bfd, hit_data); |
993 | |
|
994 | 0 | Rvalue1 = (Rvalue1 ^ 0x8000) - 0x8000; |
995 | 0 | Rvalue += Rvalue1; |
996 | | |
997 | | /* Check for range. */ |
998 | 0 | if (Rvalue > 0xffff) |
999 | 0 | return bfd_reloc_overflow; |
1000 | 0 | } |
1001 | | |
1002 | 0 | bfd_put_16 (input_bfd, Rvalue, hit_data); |
1003 | 0 | break; |
1004 | | |
1005 | 0 | case 4: |
1006 | 0 | if ((r_type == R_CR16_ABS20) || (r_type == R_CR16_IMM20)) |
1007 | 0 | { |
1008 | 0 | Rvalue1 = (bfd_get_16 (input_bfd, hit_data + 2) |
1009 | 0 | | (((bfd_get_16 (input_bfd, hit_data) & 0xf) << 16))); |
1010 | |
|
1011 | 0 | Rvalue1 = (Rvalue1 ^ 0x80000) - 0x80000; |
1012 | 0 | Rvalue += Rvalue1; |
1013 | | |
1014 | | /* Check for range. */ |
1015 | 0 | if (Rvalue > 0xfffff) |
1016 | 0 | return bfd_reloc_overflow; |
1017 | | |
1018 | 0 | bfd_put_16 (input_bfd, ((bfd_get_16 (input_bfd, hit_data) & 0xfff0) |
1019 | 0 | | ((Rvalue >> 16) & 0xf)), hit_data); |
1020 | 0 | bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2); |
1021 | 0 | } |
1022 | 0 | else if (r_type == R_CR16_GOT_REGREL20) |
1023 | 0 | { |
1024 | 0 | asection *sgot = elf_hash_table (info)->sgot; |
1025 | 0 | bfd_vma off; |
1026 | |
|
1027 | 0 | if (h != NULL) |
1028 | 0 | { |
1029 | 0 | off = h->got.offset; |
1030 | 0 | BFD_ASSERT (off != (bfd_vma) -1); |
1031 | |
|
1032 | 0 | if (! elf_hash_table (info)->dynamic_sections_created |
1033 | 0 | || SYMBOL_REFERENCES_LOCAL (info, h)) |
1034 | | /* This is actually a static link, or it is a |
1035 | | -Bsymbolic link and the symbol is defined |
1036 | | locally, or the symbol was forced to be local |
1037 | | because of a version file. We must initialize |
1038 | | this entry in the global offset table. |
1039 | | When doing a dynamic link, we create a .rela.got |
1040 | | relocation entry to initialize the value. This |
1041 | | is done in the finish_dynamic_symbol routine. */ |
1042 | 0 | bfd_put_32 (output_bfd, Rvalue, sgot->contents + off); |
1043 | 0 | } |
1044 | 0 | else |
1045 | 0 | { |
1046 | 0 | off = elf_local_got_offsets (input_bfd)[symndx]; |
1047 | 0 | bfd_put_32 (output_bfd, Rvalue, sgot->contents + off); |
1048 | 0 | } |
1049 | |
|
1050 | 0 | Rvalue = sgot->output_offset + off; |
1051 | 0 | Rvalue += addend; |
1052 | | |
1053 | | /* REVISIT: if ((long) Rvalue > 0xffffff || |
1054 | | (long) Rvalue < -0x800000). */ |
1055 | 0 | if (Rvalue > 0xffffff) |
1056 | 0 | return bfd_reloc_overflow; |
1057 | | |
1058 | | |
1059 | 0 | bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data)) |
1060 | 0 | | (((Rvalue >> 16) & 0xf) << 8), hit_data); |
1061 | 0 | bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2); |
1062 | |
|
1063 | 0 | } |
1064 | 0 | else if (r_type == R_CR16_GOTC_REGREL20) |
1065 | 0 | { |
1066 | 0 | asection *sgot = elf_hash_table (info)->sgot; |
1067 | 0 | bfd_vma off; |
1068 | |
|
1069 | 0 | if (h != NULL) |
1070 | 0 | { |
1071 | 0 | off = h->got.offset; |
1072 | 0 | BFD_ASSERT (off != (bfd_vma) -1); |
1073 | |
|
1074 | 0 | Rvalue >>= 1; /* For code symbols. */ |
1075 | |
|
1076 | 0 | if (! elf_hash_table (info)->dynamic_sections_created |
1077 | 0 | || SYMBOL_REFERENCES_LOCAL (info, h)) |
1078 | | /* This is actually a static link, or it is a |
1079 | | -Bsymbolic link and the symbol is defined |
1080 | | locally, or the symbol was forced to be local |
1081 | | because of a version file. We must initialize |
1082 | | this entry in the global offset table. |
1083 | | When doing a dynamic link, we create a .rela.got |
1084 | | relocation entry to initialize the value. This |
1085 | | is done in the finish_dynamic_symbol routine. */ |
1086 | 0 | bfd_put_32 (output_bfd, Rvalue, sgot->contents + off); |
1087 | 0 | } |
1088 | 0 | else |
1089 | 0 | { |
1090 | 0 | off = elf_local_got_offsets (input_bfd)[symndx]; |
1091 | 0 | Rvalue >>= 1; |
1092 | 0 | bfd_put_32 (output_bfd, Rvalue, sgot->contents + off); |
1093 | 0 | } |
1094 | |
|
1095 | 0 | Rvalue = sgot->output_offset + off; |
1096 | 0 | Rvalue += addend; |
1097 | | |
1098 | | /* Check if any value in DISP. */ |
1099 | 0 | Rvalue1 = bfd_get_32 (input_bfd, hit_data); |
1100 | 0 | Rvalue1 = ((Rvalue1 >> 16) | ((Rvalue1 & 0xfff) >> 8 << 16)); |
1101 | |
|
1102 | 0 | Rvalue1 = (Rvalue1 ^ 0x80000) - 0x80000; |
1103 | 0 | Rvalue += Rvalue1; |
1104 | | |
1105 | | /* Check for range. */ |
1106 | | /* REVISIT: if ((long) Rvalue > 0xffffff |
1107 | | || (long) Rvalue < -0x800000). */ |
1108 | 0 | if (Rvalue > 0xffffff) |
1109 | 0 | return bfd_reloc_overflow; |
1110 | | |
1111 | 0 | bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data)) |
1112 | 0 | | (((Rvalue >> 16) & 0xf) << 8), hit_data); |
1113 | 0 | bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2); |
1114 | 0 | } |
1115 | 0 | else |
1116 | 0 | { |
1117 | 0 | if (r_type == R_CR16_ABS24) |
1118 | 0 | { |
1119 | 0 | Rvalue1 = bfd_get_32 (input_bfd, hit_data); |
1120 | 0 | Rvalue1 = ((Rvalue1 >> 16) |
1121 | 0 | | ((Rvalue1 & 0xfff) >> 8 << 16) |
1122 | 0 | | ((Rvalue1 & 0xf) << 20)); |
1123 | |
|
1124 | 0 | Rvalue1 = (Rvalue1 ^ 0x800000) - 0x800000; |
1125 | 0 | Rvalue += Rvalue1; |
1126 | | |
1127 | | /* Check for Range. */ |
1128 | 0 | if (Rvalue > 0xffffff) |
1129 | 0 | return bfd_reloc_overflow; |
1130 | | |
1131 | 0 | Rvalue = ((((Rvalue >> 20) & 0xf) | (((Rvalue >> 16) & 0xf)<<8) |
1132 | 0 | | (bfd_get_32 (input_bfd, hit_data) & 0xf0f0)) |
1133 | 0 | | ((Rvalue & 0xffff) << 16)); |
1134 | 0 | } |
1135 | 0 | else if (r_type == R_CR16_DISP24) |
1136 | 0 | { |
1137 | 0 | Rvalue = ((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8) |
1138 | 0 | | (bfd_get_16 (input_bfd, hit_data))) |
1139 | 0 | | (((Rvalue & 0xfffe) | ((Rvalue >> 24) & 0x1)) << 16)); |
1140 | 0 | } |
1141 | 0 | else if ((r_type == R_CR16_IMM32) || (r_type == R_CR16_IMM32a)) |
1142 | 0 | { |
1143 | 0 | Rvalue1 = bfd_get_32 (input_bfd, hit_data); |
1144 | 0 | Rvalue1 = (((Rvalue1 >> 16) & 0xffff) |
1145 | 0 | | ((Rvalue1 & 0xffff) << 16)); |
1146 | |
|
1147 | 0 | Rvalue1 = (Rvalue1 ^ 0x80000000) - 0x80000000; |
1148 | 0 | Rvalue += Rvalue1; |
1149 | | |
1150 | | /* Check for range. */ |
1151 | 0 | if (Rvalue > 0xffffffff) |
1152 | 0 | return bfd_reloc_overflow; |
1153 | | |
1154 | 0 | Rvalue = (((Rvalue >> 16) & 0xffff) | (Rvalue & 0xffff) << 16); |
1155 | 0 | } |
1156 | 0 | else if (r_type == R_CR16_DISP24a) |
1157 | 0 | { |
1158 | 0 | Rvalue = (((Rvalue & 0xfffffe) | (Rvalue >> 23))); |
1159 | 0 | Rvalue = (((Rvalue >> 16) & 0xff) | ((Rvalue & 0xffff) << 16) |
1160 | 0 | | bfd_get_32 (input_bfd, hit_data)); |
1161 | 0 | } |
1162 | 0 | else if ((r_type == R_CR16_REGREL20) |
1163 | 0 | || (r_type == R_CR16_REGREL20a)) |
1164 | 0 | { |
1165 | 0 | Rvalue1 = bfd_get_32 (input_bfd, hit_data); |
1166 | 0 | Rvalue1 = (((Rvalue1 >> 16) & 0xffff) |
1167 | 0 | | ((Rvalue1 & 0xfff) >> 8 << 16)); |
1168 | |
|
1169 | 0 | Rvalue1 = (Rvalue1 ^ 0x80000) - 0x80000; |
1170 | 0 | Rvalue += Rvalue1; |
1171 | | |
1172 | | /* Check for range. */ |
1173 | 0 | if (Rvalue > 0xfffff) |
1174 | 0 | return bfd_reloc_overflow; |
1175 | | |
1176 | 0 | Rvalue = (((((Rvalue >> 20) & 0xf) | (((Rvalue >> 16) & 0xf) << 8) |
1177 | 0 | | ((Rvalue & 0xffff) << 16))) |
1178 | 0 | | (bfd_get_32 (input_bfd, hit_data) & 0xf0ff)); |
1179 | |
|
1180 | 0 | } |
1181 | 0 | else if (r_type == R_CR16_NUM32) |
1182 | 0 | { |
1183 | 0 | Rvalue1 = (bfd_get_32 (input_bfd, hit_data)); |
1184 | |
|
1185 | 0 | Rvalue1 = (Rvalue1 ^ 0x80000000) - 0x80000000; |
1186 | 0 | Rvalue += Rvalue1; |
1187 | | |
1188 | | /* Check for Range. */ |
1189 | 0 | if (Rvalue > 0xffffffff) |
1190 | 0 | return bfd_reloc_overflow; |
1191 | 0 | } |
1192 | | |
1193 | 0 | bfd_put_32 (input_bfd, Rvalue, hit_data); |
1194 | 0 | } |
1195 | 0 | break; |
1196 | | |
1197 | 0 | default: |
1198 | 0 | return bfd_reloc_notsupported; |
1199 | 0 | } |
1200 | | |
1201 | 0 | return bfd_reloc_ok; |
1202 | 0 | } |
1203 | | |
1204 | | /* Delete some bytes from a section while relaxing. */ |
1205 | | |
1206 | | static bool |
1207 | | elf32_cr16_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd, |
1208 | | asection *sec, bfd_vma addr, int count) |
1209 | 0 | { |
1210 | 0 | Elf_Internal_Shdr *symtab_hdr; |
1211 | 0 | unsigned int sec_shndx; |
1212 | 0 | bfd_byte *contents; |
1213 | 0 | Elf_Internal_Rela *irel, *irelend; |
1214 | 0 | bfd_vma toaddr; |
1215 | 0 | Elf_Internal_Sym *isym; |
1216 | 0 | Elf_Internal_Sym *isymend; |
1217 | 0 | struct elf_link_hash_entry **sym_hashes; |
1218 | 0 | struct elf_link_hash_entry **end_hashes; |
1219 | 0 | struct elf_link_hash_entry **start_hashes; |
1220 | 0 | unsigned int symcount; |
1221 | |
|
1222 | 0 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
1223 | |
|
1224 | 0 | contents = elf_section_data (sec)->this_hdr.contents; |
1225 | |
|
1226 | 0 | toaddr = sec->size; |
1227 | |
|
1228 | 0 | irel = elf_section_data (sec)->relocs; |
1229 | 0 | irelend = irel + sec->reloc_count; |
1230 | | |
1231 | | /* Actually delete the bytes. */ |
1232 | 0 | memmove (contents + addr, contents + addr + count, |
1233 | 0 | (size_t) (toaddr - addr - count)); |
1234 | 0 | sec->size -= count; |
1235 | | |
1236 | | /* Adjust all the relocs. */ |
1237 | 0 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
1238 | | /* Get the new reloc address. */ |
1239 | 0 | if ((irel->r_offset > addr && irel->r_offset < toaddr)) |
1240 | 0 | irel->r_offset -= count; |
1241 | | |
1242 | | /* Adjust the local symbols defined in this section. */ |
1243 | 0 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1244 | 0 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
1245 | 0 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
1246 | 0 | { |
1247 | 0 | if (isym->st_shndx == sec_shndx |
1248 | 0 | && isym->st_value > addr |
1249 | 0 | && isym->st_value < toaddr) |
1250 | 0 | { |
1251 | | /* Adjust the addend of SWITCH relocations in this section, |
1252 | | which reference this local symbol. */ |
1253 | | #if 0 |
1254 | | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
1255 | | { |
1256 | | unsigned long r_symndx; |
1257 | | Elf_Internal_Sym *rsym; |
1258 | | bfd_vma addsym, subsym; |
1259 | | |
1260 | | /* Skip if not a SWITCH relocation. */ |
1261 | | if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH8 |
1262 | | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH16 |
1263 | | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH32) |
1264 | | continue; |
1265 | | |
1266 | | r_symndx = ELF32_R_SYM (irel->r_info); |
1267 | | rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx; |
1268 | | |
1269 | | /* Skip if not the local adjusted symbol. */ |
1270 | | if (rsym != isym) |
1271 | | continue; |
1272 | | |
1273 | | addsym = isym->st_value; |
1274 | | subsym = addsym - irel->r_addend; |
1275 | | |
1276 | | /* Fix the addend only when -->> (addsym > addr >= subsym). */ |
1277 | | if (subsym <= addr) |
1278 | | irel->r_addend -= count; |
1279 | | else |
1280 | | continue; |
1281 | | } |
1282 | | #endif |
1283 | |
|
1284 | 0 | isym->st_value -= count; |
1285 | 0 | } |
1286 | 0 | } |
1287 | | |
1288 | | /* Now adjust the global symbols defined in this section. */ |
1289 | 0 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
1290 | 0 | - symtab_hdr->sh_info); |
1291 | 0 | sym_hashes = start_hashes = elf_sym_hashes (abfd); |
1292 | 0 | end_hashes = sym_hashes + symcount; |
1293 | |
|
1294 | 0 | for (; sym_hashes < end_hashes; sym_hashes++) |
1295 | 0 | { |
1296 | 0 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
1297 | | |
1298 | | /* The '--wrap SYMBOL' option is causing a pain when the object file, |
1299 | | containing the definition of __wrap_SYMBOL, includes a direct |
1300 | | call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference |
1301 | | the same symbol (which is __wrap_SYMBOL), but still exist as two |
1302 | | different symbols in 'sym_hashes', we don't want to adjust |
1303 | | the global symbol __wrap_SYMBOL twice. |
1304 | | This check is only relevant when symbols are being wrapped. */ |
1305 | 0 | if (link_info->wrap_hash != NULL) |
1306 | 0 | { |
1307 | 0 | struct elf_link_hash_entry **cur_sym_hashes; |
1308 | | |
1309 | | /* Loop only over the symbols whom been already checked. */ |
1310 | 0 | for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes; |
1311 | 0 | cur_sym_hashes++) |
1312 | | /* If the current symbol is identical to 'sym_hash', that means |
1313 | | the symbol was already adjusted (or at least checked). */ |
1314 | 0 | if (*cur_sym_hashes == sym_hash) |
1315 | 0 | break; |
1316 | | |
1317 | | /* Don't adjust the symbol again. */ |
1318 | 0 | if (cur_sym_hashes < sym_hashes) |
1319 | 0 | continue; |
1320 | 0 | } |
1321 | | |
1322 | 0 | if ((sym_hash->root.type == bfd_link_hash_defined |
1323 | 0 | || sym_hash->root.type == bfd_link_hash_defweak) |
1324 | 0 | && sym_hash->root.u.def.section == sec |
1325 | 0 | && sym_hash->root.u.def.value > addr |
1326 | 0 | && sym_hash->root.u.def.value < toaddr) |
1327 | 0 | sym_hash->root.u.def.value -= count; |
1328 | 0 | } |
1329 | |
|
1330 | 0 | return true; |
1331 | 0 | } |
1332 | | |
1333 | | /* Relocate a CR16 ELF section. */ |
1334 | | |
1335 | | static int |
1336 | | elf32_cr16_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
1337 | | bfd *input_bfd, asection *input_section, |
1338 | | bfd_byte *contents, Elf_Internal_Rela *relocs, |
1339 | | Elf_Internal_Sym *local_syms, |
1340 | | asection **local_sections) |
1341 | 0 | { |
1342 | 0 | Elf_Internal_Shdr *symtab_hdr; |
1343 | 0 | struct elf_link_hash_entry **sym_hashes; |
1344 | 0 | Elf_Internal_Rela *rel, *relend; |
1345 | |
|
1346 | 0 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1347 | 0 | sym_hashes = elf_sym_hashes (input_bfd); |
1348 | |
|
1349 | 0 | rel = relocs; |
1350 | 0 | relend = relocs + input_section->reloc_count; |
1351 | 0 | for (; rel < relend; rel++) |
1352 | 0 | { |
1353 | 0 | int r_type; |
1354 | 0 | reloc_howto_type *howto; |
1355 | 0 | unsigned long r_symndx; |
1356 | 0 | Elf_Internal_Sym *sym; |
1357 | 0 | asection *sec; |
1358 | 0 | struct elf_link_hash_entry *h; |
1359 | 0 | bfd_vma relocation; |
1360 | 0 | bfd_reloc_status_type r; |
1361 | |
|
1362 | 0 | r_symndx = ELF32_R_SYM (rel->r_info); |
1363 | 0 | r_type = ELF32_R_TYPE (rel->r_info); |
1364 | 0 | howto = cr16_elf_howto_table + (r_type); |
1365 | |
|
1366 | 0 | h = NULL; |
1367 | 0 | sym = NULL; |
1368 | 0 | sec = NULL; |
1369 | 0 | if (r_symndx < symtab_hdr->sh_info) |
1370 | 0 | { |
1371 | 0 | sym = local_syms + r_symndx; |
1372 | 0 | sec = local_sections[r_symndx]; |
1373 | 0 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
1374 | 0 | } |
1375 | 0 | else |
1376 | 0 | { |
1377 | 0 | bool unresolved_reloc, warned, ignored; |
1378 | |
|
1379 | 0 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
1380 | 0 | r_symndx, symtab_hdr, sym_hashes, |
1381 | 0 | h, sec, relocation, |
1382 | 0 | unresolved_reloc, warned, ignored); |
1383 | 0 | } |
1384 | | |
1385 | 0 | if (sec != NULL && discarded_section (sec)) |
1386 | 0 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
1387 | 0 | rel, 1, relend, howto, 0, contents); |
1388 | |
|
1389 | 0 | if (bfd_link_relocatable (info)) |
1390 | 0 | continue; |
1391 | | |
1392 | 0 | r = cr16_elf_final_link_relocate (howto, input_bfd, output_bfd, |
1393 | 0 | input_section, |
1394 | 0 | contents, rel->r_offset, |
1395 | 0 | relocation, rel->r_addend, |
1396 | 0 | (struct elf_link_hash_entry *) h, |
1397 | 0 | r_symndx, |
1398 | 0 | info, sec, h == NULL); |
1399 | |
|
1400 | 0 | if (r != bfd_reloc_ok) |
1401 | 0 | { |
1402 | 0 | const char *name; |
1403 | 0 | const char *msg = NULL; |
1404 | |
|
1405 | 0 | if (h != NULL) |
1406 | 0 | name = h->root.root.string; |
1407 | 0 | else |
1408 | 0 | { |
1409 | 0 | name = (bfd_elf_string_from_elf_section |
1410 | 0 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
1411 | 0 | if (name == NULL || *name == '\0') |
1412 | 0 | name = bfd_section_name (sec); |
1413 | 0 | } |
1414 | |
|
1415 | 0 | switch (r) |
1416 | 0 | { |
1417 | 0 | case bfd_reloc_overflow: |
1418 | 0 | (*info->callbacks->reloc_overflow) |
1419 | 0 | (info, (h ? &h->root : NULL), name, howto->name, |
1420 | 0 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
1421 | 0 | break; |
1422 | | |
1423 | 0 | case bfd_reloc_undefined: |
1424 | 0 | (*info->callbacks->undefined_symbol) |
1425 | 0 | (info, name, input_bfd, input_section, rel->r_offset, true); |
1426 | 0 | break; |
1427 | | |
1428 | 0 | case bfd_reloc_outofrange: |
1429 | 0 | msg = _("internal error: out of range error"); |
1430 | 0 | goto common_error; |
1431 | | |
1432 | 0 | case bfd_reloc_notsupported: |
1433 | 0 | msg = _("internal error: unsupported relocation error"); |
1434 | 0 | goto common_error; |
1435 | | |
1436 | 0 | case bfd_reloc_dangerous: |
1437 | 0 | msg = _("internal error: dangerous error"); |
1438 | 0 | goto common_error; |
1439 | | |
1440 | 0 | default: |
1441 | 0 | msg = _("internal error: unknown error"); |
1442 | | /* Fall through. */ |
1443 | |
|
1444 | 0 | common_error: |
1445 | 0 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
1446 | 0 | input_section, rel->r_offset); |
1447 | 0 | break; |
1448 | 0 | } |
1449 | 0 | } |
1450 | 0 | } |
1451 | | |
1452 | 0 | return true; |
1453 | 0 | } |
1454 | | |
1455 | | /* This is a version of bfd_generic_get_relocated_section_contents |
1456 | | which uses elf32_cr16_relocate_section. */ |
1457 | | |
1458 | | static bfd_byte * |
1459 | | elf32_cr16_get_relocated_section_contents (bfd *output_bfd, |
1460 | | struct bfd_link_info *link_info, |
1461 | | struct bfd_link_order *link_order, |
1462 | | bfd_byte *data, |
1463 | | bool relocatable, |
1464 | | asymbol **symbols) |
1465 | 8 | { |
1466 | 8 | Elf_Internal_Shdr *symtab_hdr; |
1467 | 8 | asection *input_section = link_order->u.indirect.section; |
1468 | 8 | bfd *input_bfd = input_section->owner; |
1469 | 8 | asection **sections = NULL; |
1470 | 8 | Elf_Internal_Rela *internal_relocs = NULL; |
1471 | 8 | Elf_Internal_Sym *isymbuf = NULL; |
1472 | | |
1473 | | /* We only need to handle the case of relaxing, or of having a |
1474 | | particular set of section contents, specially. */ |
1475 | 8 | if (relocatable |
1476 | 8 | || elf_section_data (input_section)->this_hdr.contents == NULL) |
1477 | 8 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, |
1478 | 8 | link_order, data, |
1479 | 8 | relocatable, |
1480 | 8 | symbols); |
1481 | | |
1482 | 0 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1483 | |
|
1484 | 0 | bfd_byte *orig_data = data; |
1485 | 0 | if (data == NULL) |
1486 | 0 | { |
1487 | 0 | data = bfd_malloc (input_section->size); |
1488 | 0 | if (data == NULL) |
1489 | 0 | return NULL; |
1490 | 0 | } |
1491 | 0 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, |
1492 | 0 | (size_t) input_section->size); |
1493 | |
|
1494 | 0 | if ((input_section->flags & SEC_RELOC) != 0 |
1495 | 0 | && input_section->reloc_count > 0) |
1496 | 0 | { |
1497 | 0 | Elf_Internal_Sym *isym; |
1498 | 0 | Elf_Internal_Sym *isymend; |
1499 | 0 | asection **secpp; |
1500 | 0 | bfd_size_type amt; |
1501 | |
|
1502 | 0 | internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section, |
1503 | 0 | NULL, NULL, false); |
1504 | 0 | if (internal_relocs == NULL) |
1505 | 0 | goto error_return; |
1506 | | |
1507 | 0 | if (symtab_hdr->sh_info != 0) |
1508 | 0 | { |
1509 | 0 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
1510 | 0 | if (isymbuf == NULL) |
1511 | 0 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
1512 | 0 | symtab_hdr->sh_info, 0, |
1513 | 0 | NULL, NULL, NULL); |
1514 | 0 | if (isymbuf == NULL) |
1515 | 0 | goto error_return; |
1516 | 0 | } |
1517 | | |
1518 | 0 | amt = symtab_hdr->sh_info; |
1519 | 0 | amt *= sizeof (asection *); |
1520 | 0 | sections = bfd_malloc (amt); |
1521 | 0 | if (sections == NULL && amt != 0) |
1522 | 0 | goto error_return; |
1523 | | |
1524 | 0 | isymend = isymbuf + symtab_hdr->sh_info; |
1525 | 0 | for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) |
1526 | 0 | { |
1527 | 0 | asection *isec; |
1528 | |
|
1529 | 0 | if (isym->st_shndx == SHN_UNDEF) |
1530 | 0 | isec = bfd_und_section_ptr; |
1531 | 0 | else if (isym->st_shndx == SHN_ABS) |
1532 | 0 | isec = bfd_abs_section_ptr; |
1533 | 0 | else if (isym->st_shndx == SHN_COMMON) |
1534 | 0 | isec = bfd_com_section_ptr; |
1535 | 0 | else |
1536 | 0 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
1537 | |
|
1538 | 0 | *secpp = isec; |
1539 | 0 | } |
1540 | |
|
1541 | 0 | if (! elf32_cr16_relocate_section (output_bfd, link_info, input_bfd, |
1542 | 0 | input_section, data, internal_relocs, |
1543 | 0 | isymbuf, sections)) |
1544 | 0 | goto error_return; |
1545 | | |
1546 | 0 | free (sections); |
1547 | 0 | if (symtab_hdr->contents != (unsigned char *) isymbuf) |
1548 | 0 | free (isymbuf); |
1549 | 0 | if (elf_section_data (input_section)->relocs != internal_relocs) |
1550 | 0 | free (internal_relocs); |
1551 | 0 | } |
1552 | | |
1553 | 0 | return data; |
1554 | | |
1555 | 0 | error_return: |
1556 | 0 | free (sections); |
1557 | 0 | if (symtab_hdr->contents != (unsigned char *) isymbuf) |
1558 | 0 | free (isymbuf); |
1559 | 0 | if (elf_section_data (input_section)->relocs != internal_relocs) |
1560 | 0 | free (internal_relocs); |
1561 | 0 | if (orig_data == NULL) |
1562 | 0 | free (data); |
1563 | 0 | return NULL; |
1564 | 0 | } |
1565 | | |
1566 | | /* Assorted hash table functions. */ |
1567 | | |
1568 | | /* Initialize an entry in the link hash table. */ |
1569 | | |
1570 | | /* Create an entry in an CR16 ELF linker hash table. */ |
1571 | | |
1572 | | static struct bfd_hash_entry * |
1573 | | elf32_cr16_link_hash_newfunc (struct bfd_hash_entry *entry, |
1574 | | struct bfd_hash_table *table, |
1575 | | const char *string) |
1576 | 0 | { |
1577 | 0 | struct elf32_cr16_link_hash_entry *ret = |
1578 | 0 | (struct elf32_cr16_link_hash_entry *) entry; |
1579 | | |
1580 | | /* Allocate the structure if it has not already been allocated by a |
1581 | | subclass. */ |
1582 | 0 | if (ret == (struct elf32_cr16_link_hash_entry *) NULL) |
1583 | 0 | ret = ((struct elf32_cr16_link_hash_entry *) |
1584 | 0 | bfd_hash_allocate (table, |
1585 | 0 | sizeof (struct elf32_cr16_link_hash_entry))); |
1586 | 0 | if (ret == (struct elf32_cr16_link_hash_entry *) NULL) |
1587 | 0 | return (struct bfd_hash_entry *) ret; |
1588 | | |
1589 | | /* Call the allocation method of the superclass. */ |
1590 | 0 | ret = ((struct elf32_cr16_link_hash_entry *) |
1591 | 0 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
1592 | 0 | table, string)); |
1593 | 0 | if (ret != (struct elf32_cr16_link_hash_entry *) NULL) |
1594 | 0 | { |
1595 | 0 | ret->direct_calls = 0; |
1596 | 0 | ret->stack_size = 0; |
1597 | 0 | ret->movm_args = 0; |
1598 | 0 | ret->movm_stack_size = 0; |
1599 | 0 | ret->flags = 0; |
1600 | 0 | ret->value = 0; |
1601 | 0 | } |
1602 | |
|
1603 | 0 | return (struct bfd_hash_entry *) ret; |
1604 | 0 | } |
1605 | | |
1606 | | /* Create an cr16 ELF linker hash table. */ |
1607 | | |
1608 | | static struct bfd_link_hash_table * |
1609 | | elf32_cr16_link_hash_table_create (bfd *abfd) |
1610 | 0 | { |
1611 | 0 | struct elf_link_hash_table *ret; |
1612 | 0 | size_t amt = sizeof (struct elf_link_hash_table); |
1613 | |
|
1614 | 0 | ret = (struct elf_link_hash_table *) bfd_zmalloc (amt); |
1615 | 0 | if (ret == (struct elf_link_hash_table *) NULL) |
1616 | 0 | return NULL; |
1617 | | |
1618 | 0 | if (!_bfd_elf_link_hash_table_init (ret, abfd, |
1619 | 0 | elf32_cr16_link_hash_newfunc, |
1620 | 0 | sizeof (struct elf32_cr16_link_hash_entry))) |
1621 | 0 | { |
1622 | 0 | free (ret); |
1623 | 0 | return NULL; |
1624 | 0 | } |
1625 | | |
1626 | 0 | return &ret->root; |
1627 | 0 | } |
1628 | | |
1629 | | static unsigned long |
1630 | | elf_cr16_mach (flagword flags) |
1631 | 911 | { |
1632 | 911 | switch (flags) |
1633 | 911 | { |
1634 | 0 | case EM_CR16: |
1635 | 911 | default: |
1636 | 911 | return bfd_mach_cr16; |
1637 | 911 | } |
1638 | 911 | } |
1639 | | |
1640 | | /* The final processing done just before writing out a CR16 ELF object |
1641 | | file. This gets the CR16 architecture right based on the machine |
1642 | | number. */ |
1643 | | |
1644 | | static bool |
1645 | | _bfd_cr16_elf_final_write_processing (bfd *abfd) |
1646 | 0 | { |
1647 | 0 | unsigned long val; |
1648 | 0 | switch (bfd_get_mach (abfd)) |
1649 | 0 | { |
1650 | 0 | default: |
1651 | 0 | case bfd_mach_cr16: |
1652 | 0 | val = EM_CR16; |
1653 | 0 | break; |
1654 | 0 | } |
1655 | 0 | elf_elfheader (abfd)->e_flags |= val; |
1656 | 0 | return _bfd_elf_final_write_processing (abfd); |
1657 | 0 | } |
1658 | | |
1659 | | |
1660 | | static bool |
1661 | | _bfd_cr16_elf_object_p (bfd *abfd) |
1662 | 911 | { |
1663 | 911 | bfd_default_set_arch_mach (abfd, bfd_arch_cr16, |
1664 | 911 | elf_cr16_mach (elf_elfheader (abfd)->e_flags)); |
1665 | 911 | return true; |
1666 | 911 | } |
1667 | | |
1668 | | /* Merge backend specific data from an object file to the output |
1669 | | object file when linking. */ |
1670 | | |
1671 | | static bool |
1672 | | _bfd_cr16_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
1673 | 0 | { |
1674 | 0 | bfd *obfd = info->output_bfd; |
1675 | |
|
1676 | 0 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
1677 | 0 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
1678 | 0 | return true; |
1679 | | |
1680 | 0 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
1681 | 0 | && bfd_get_mach (obfd) < bfd_get_mach (ibfd)) |
1682 | 0 | { |
1683 | 0 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), |
1684 | 0 | bfd_get_mach (ibfd))) |
1685 | 0 | return false; |
1686 | 0 | } |
1687 | | |
1688 | 0 | return true; |
1689 | 0 | } |
1690 | | |
1691 | | |
1692 | | /* This function handles relaxing for the CR16. |
1693 | | |
1694 | | There's quite a few relaxing opportunites available on the CR16: |
1695 | | |
1696 | | * bcond:24 -> bcond:16 1 byte |
1697 | | * bcond:16 -> bcond:8 1 byte |
1698 | | * arithmetic imm32 -> arithmetic imm20 12 bits |
1699 | | * arithmetic imm20/imm16 -> arithmetic imm4 12/16 bits |
1700 | | |
1701 | | Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */ |
1702 | | |
1703 | | static bool |
1704 | | elf32_cr16_relax_section (bfd *abfd, asection *sec, |
1705 | | struct bfd_link_info *link_info, bool *again) |
1706 | 0 | { |
1707 | 0 | Elf_Internal_Shdr *symtab_hdr; |
1708 | 0 | Elf_Internal_Rela *internal_relocs; |
1709 | 0 | Elf_Internal_Rela *irel, *irelend; |
1710 | 0 | bfd_byte *contents = NULL; |
1711 | 0 | Elf_Internal_Sym *isymbuf = NULL; |
1712 | | |
1713 | | /* Assume nothing changes. */ |
1714 | 0 | *again = false; |
1715 | | |
1716 | | /* We don't have to do anything for a relocatable link, if |
1717 | | this section does not have relocs, or if this is not a |
1718 | | code section. */ |
1719 | 0 | if (bfd_link_relocatable (link_info) |
1720 | 0 | || sec->reloc_count == 0 |
1721 | 0 | || (sec->flags & SEC_RELOC) == 0 |
1722 | 0 | || (sec->flags & SEC_HAS_CONTENTS) == 0 |
1723 | 0 | || (sec->flags & SEC_CODE) == 0) |
1724 | 0 | return true; |
1725 | | |
1726 | 0 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1727 | | |
1728 | | /* Get a copy of the native relocations. */ |
1729 | 0 | internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, |
1730 | 0 | link_info->keep_memory); |
1731 | 0 | if (internal_relocs == NULL) |
1732 | 0 | goto error_return; |
1733 | | |
1734 | | /* Walk through them looking for relaxing opportunities. */ |
1735 | 0 | irelend = internal_relocs + sec->reloc_count; |
1736 | 0 | for (irel = internal_relocs; irel < irelend; irel++) |
1737 | 0 | { |
1738 | 0 | bfd_vma symval; |
1739 | | |
1740 | | /* If this isn't something that can be relaxed, then ignore |
1741 | | this reloc. */ |
1742 | 0 | if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP16 |
1743 | 0 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP24 |
1744 | 0 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM32 |
1745 | 0 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM20 |
1746 | 0 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM16) |
1747 | 0 | continue; |
1748 | | |
1749 | | /* Get the section contents if we haven't done so already. */ |
1750 | 0 | if (contents == NULL) |
1751 | 0 | { |
1752 | | /* Get cached copy if it exists. */ |
1753 | 0 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
1754 | 0 | contents = elf_section_data (sec)->this_hdr.contents; |
1755 | | /* Go get them off disk. */ |
1756 | 0 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) |
1757 | 0 | goto error_return; |
1758 | 0 | } |
1759 | | |
1760 | | /* Read this BFD's local symbols if we haven't done so already. */ |
1761 | 0 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
1762 | 0 | { |
1763 | 0 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
1764 | 0 | if (isymbuf == NULL) |
1765 | 0 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
1766 | 0 | symtab_hdr->sh_info, 0, |
1767 | 0 | NULL, NULL, NULL); |
1768 | 0 | if (isymbuf == NULL) |
1769 | 0 | goto error_return; |
1770 | 0 | } |
1771 | | |
1772 | | /* Get the value of the symbol referred to by the reloc. */ |
1773 | 0 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
1774 | 0 | { |
1775 | | /* A local symbol. */ |
1776 | 0 | Elf_Internal_Sym *isym; |
1777 | 0 | asection *sym_sec; |
1778 | |
|
1779 | 0 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
1780 | 0 | if (isym->st_shndx == SHN_UNDEF) |
1781 | 0 | sym_sec = bfd_und_section_ptr; |
1782 | 0 | else if (isym->st_shndx == SHN_ABS) |
1783 | 0 | sym_sec = bfd_abs_section_ptr; |
1784 | 0 | else if (isym->st_shndx == SHN_COMMON) |
1785 | 0 | sym_sec = bfd_com_section_ptr; |
1786 | 0 | else |
1787 | 0 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
1788 | 0 | symval = (isym->st_value |
1789 | 0 | + sym_sec->output_section->vma |
1790 | 0 | + sym_sec->output_offset); |
1791 | 0 | } |
1792 | 0 | else |
1793 | 0 | { |
1794 | 0 | unsigned long indx; |
1795 | 0 | struct elf_link_hash_entry *h; |
1796 | | |
1797 | | /* An external symbol. */ |
1798 | 0 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
1799 | 0 | h = elf_sym_hashes (abfd)[indx]; |
1800 | 0 | BFD_ASSERT (h != NULL); |
1801 | |
|
1802 | 0 | if (h->root.type != bfd_link_hash_defined |
1803 | 0 | && h->root.type != bfd_link_hash_defweak) |
1804 | | /* This appears to be a reference to an undefined |
1805 | | symbol. Just ignore it--it will be caught by the |
1806 | | regular reloc processing. */ |
1807 | 0 | continue; |
1808 | | |
1809 | 0 | symval = (h->root.u.def.value |
1810 | 0 | + h->root.u.def.section->output_section->vma |
1811 | 0 | + h->root.u.def.section->output_offset); |
1812 | 0 | } |
1813 | | |
1814 | | /* For simplicity of coding, we are going to modify the section |
1815 | | contents, the section relocs, and the BFD symbol table. We |
1816 | | must tell the rest of the code not to free up this |
1817 | | information. It would be possible to instead create a table |
1818 | | of changes which have to be made, as is done in coff-mips.c; |
1819 | | that would be more work, but would require less memory when |
1820 | | the linker is run. */ |
1821 | | |
1822 | | /* Try to turn a 24 branch/call into a 16bit relative |
1823 | | branch/call. */ |
1824 | 0 | if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP24) |
1825 | 0 | { |
1826 | 0 | bfd_vma value = symval; |
1827 | | |
1828 | | /* Deal with pc-relative gunk. */ |
1829 | 0 | value -= (sec->output_section->vma + sec->output_offset); |
1830 | 0 | value -= irel->r_offset; |
1831 | 0 | value += irel->r_addend; |
1832 | | |
1833 | | /* See if the value will fit in 16 bits, note the high value is |
1834 | | 0xfffe + 2 as the target will be two bytes closer if we are |
1835 | | able to relax. */ |
1836 | 0 | if ((long) value < 0x10000 && (long) value > -0x10002) |
1837 | 0 | { |
1838 | 0 | unsigned int code; |
1839 | | |
1840 | | /* Get the opcode. */ |
1841 | 0 | code = (unsigned int) bfd_get_32 (abfd, |
1842 | 0 | contents + irel->r_offset); |
1843 | | |
1844 | | /* Verify it's a 'bcond' and fix the opcode. */ |
1845 | 0 | if ((code & 0xffff) == 0x0010) |
1846 | 0 | bfd_put_16 (abfd, 0x1800 | ((0xf & (code >> 20)) << 4), |
1847 | 0 | contents + irel->r_offset); |
1848 | 0 | else |
1849 | 0 | continue; |
1850 | | |
1851 | | /* Note that we've changed the relocs, section contents, etc. */ |
1852 | 0 | elf_section_data (sec)->relocs = internal_relocs; |
1853 | 0 | elf_section_data (sec)->this_hdr.contents = contents; |
1854 | 0 | symtab_hdr->contents = (unsigned char *) isymbuf; |
1855 | | |
1856 | | /* Fix the relocation's type. */ |
1857 | 0 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
1858 | 0 | R_CR16_DISP16); |
1859 | | |
1860 | | /* Delete two bytes of data. */ |
1861 | 0 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
1862 | 0 | irel->r_offset + 2, 2)) |
1863 | 0 | goto error_return; |
1864 | | |
1865 | | /* That will change things, so, we should relax again. |
1866 | | Note that this is not required, and it may be slow. */ |
1867 | 0 | *again = true; |
1868 | 0 | } |
1869 | 0 | } |
1870 | | |
1871 | | /* Try to turn a 16bit pc-relative branch into an |
1872 | | 8bit pc-relative branch. */ |
1873 | 0 | if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP16) |
1874 | 0 | { |
1875 | 0 | bfd_vma value = symval; |
1876 | | |
1877 | | /* Deal with pc-relative gunk. */ |
1878 | 0 | value -= (sec->output_section->vma + sec->output_offset); |
1879 | 0 | value -= irel->r_offset; |
1880 | 0 | value += irel->r_addend; |
1881 | | |
1882 | | /* See if the value will fit in 8 bits, note the high value is |
1883 | | 0xfc + 2 as the target will be two bytes closer if we are |
1884 | | able to relax. */ |
1885 | | /*if ((long) value < 0x1fa && (long) value > -0x100) REVISIT:range */ |
1886 | 0 | if ((long) value < 0xfa && (long) value > -0x100) |
1887 | 0 | { |
1888 | 0 | unsigned short code; |
1889 | | |
1890 | | /* Get the opcode. */ |
1891 | 0 | code = bfd_get_16 (abfd, contents + irel->r_offset); |
1892 | | |
1893 | | /* Verify it's a 'bcond' and fix the opcode. */ |
1894 | 0 | if ((code & 0xff0f) == 0x1800) |
1895 | 0 | bfd_put_16 (abfd, (code & 0xf0f0), contents + irel->r_offset); |
1896 | 0 | else |
1897 | 0 | continue; |
1898 | | |
1899 | | /* Note that we've changed the relocs, section contents, etc. */ |
1900 | 0 | elf_section_data (sec)->relocs = internal_relocs; |
1901 | 0 | elf_section_data (sec)->this_hdr.contents = contents; |
1902 | 0 | symtab_hdr->contents = (unsigned char *) isymbuf; |
1903 | | |
1904 | | /* Fix the relocation's type. */ |
1905 | 0 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
1906 | 0 | R_CR16_DISP8); |
1907 | | |
1908 | | /* Delete two bytes of data. */ |
1909 | 0 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
1910 | 0 | irel->r_offset + 2, 2)) |
1911 | 0 | goto error_return; |
1912 | | |
1913 | | /* That will change things, so, we should relax again. |
1914 | | Note that this is not required, and it may be slow. */ |
1915 | 0 | *again = true; |
1916 | 0 | } |
1917 | 0 | } |
1918 | | |
1919 | | /* Try to turn a 32-bit IMM address into a 20/16-bit IMM address */ |
1920 | 0 | if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM32) |
1921 | 0 | { |
1922 | 0 | bfd_vma value = symval; |
1923 | 0 | unsigned short is_add_mov = 0; |
1924 | 0 | bfd_vma value1 = 0; |
1925 | | |
1926 | | /* Get the existing value from the mcode */ |
1927 | 0 | value1 = bfd_get_32 (abfd, contents + irel->r_offset + 2); |
1928 | 0 | value1 = (value1 >> 16) | ((value1 & 0xffff) << 16); |
1929 | | |
1930 | | /* See if the value will fit in 20 bits. */ |
1931 | 0 | if ((long) (value + value1) < 0xfffff && (long) (value + value1) > 0) |
1932 | 0 | { |
1933 | 0 | unsigned short code; |
1934 | | |
1935 | | /* Get the opcode. */ |
1936 | 0 | code = bfd_get_16 (abfd, contents + irel->r_offset); |
1937 | | |
1938 | | /* Verify it's a 'arithmetic ADDD or MOVD instruction'. |
1939 | | For ADDD and MOVD only, convert to IMM32 -> IMM20. */ |
1940 | |
|
1941 | 0 | if (((code & 0xfff0) == 0x0070) || ((code & 0xfff0) == 0x0020)) |
1942 | 0 | is_add_mov = 1; |
1943 | |
|
1944 | 0 | if (is_add_mov) |
1945 | 0 | { |
1946 | | /* Note that we've changed the relocs, section contents, |
1947 | | etc. */ |
1948 | 0 | elf_section_data (sec)->relocs = internal_relocs; |
1949 | 0 | elf_section_data (sec)->this_hdr.contents = contents; |
1950 | 0 | symtab_hdr->contents = (unsigned char *) isymbuf; |
1951 | | |
1952 | | /* Fix the opcode. */ |
1953 | 0 | if ((code & 0xfff0) == 0x0070) /* For movd. */ |
1954 | 0 | bfd_put_8 (abfd, 0x05, contents + irel->r_offset + 1); |
1955 | 0 | else /* code == 0x0020 for addd. */ |
1956 | 0 | bfd_put_8 (abfd, 0x04, contents + irel->r_offset + 1); |
1957 | |
|
1958 | 0 | bfd_put_8 (abfd, (code & 0xf) << 4, contents + irel->r_offset); |
1959 | | |
1960 | | /* If existing value is nagavive adjust approriately |
1961 | | place the 16-20bits (ie 4 bit) in new opcode, |
1962 | | as the 0xffffxxxx, the higher 2 byte values removed. */ |
1963 | 0 | if (value1 & 0x80000000) |
1964 | 0 | bfd_put_8 (abfd, |
1965 | 0 | (0x0f | (bfd_get_8 (abfd, |
1966 | 0 | contents + irel->r_offset))), |
1967 | 0 | contents + irel->r_offset); |
1968 | 0 | else |
1969 | 0 | bfd_put_8 (abfd, |
1970 | 0 | (((value1 >> 16) & 0xf) |
1971 | 0 | | (bfd_get_8 (abfd, |
1972 | 0 | contents + irel->r_offset))), |
1973 | 0 | contents + irel->r_offset); |
1974 | | |
1975 | | /* Fix the relocation's type. */ |
1976 | 0 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
1977 | 0 | R_CR16_IMM20); |
1978 | | |
1979 | | /* Delete two bytes of data. */ |
1980 | 0 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
1981 | 0 | irel->r_offset + 2, 2)) |
1982 | 0 | goto error_return; |
1983 | | |
1984 | | /* That will change things, so, we should relax again. |
1985 | | Note that this is not required, and it may be slow. */ |
1986 | 0 | *again = true; |
1987 | 0 | } |
1988 | 0 | } |
1989 | | |
1990 | | /* See if the value will fit in 16 bits. */ |
1991 | 0 | if ((!is_add_mov) |
1992 | 0 | && ((long)(value + value1) < 0x7fff && (long)(value + value1) > 0)) |
1993 | 0 | { |
1994 | 0 | unsigned short code; |
1995 | | |
1996 | | /* Get the opcode. */ |
1997 | 0 | code = bfd_get_16 (abfd, contents + irel->r_offset); |
1998 | | |
1999 | | /* Note that we've changed the relocs, section contents, etc. */ |
2000 | 0 | elf_section_data (sec)->relocs = internal_relocs; |
2001 | 0 | elf_section_data (sec)->this_hdr.contents = contents; |
2002 | 0 | symtab_hdr->contents = (unsigned char *) isymbuf; |
2003 | | |
2004 | | /* Fix the opcode. */ |
2005 | 0 | if ((code & 0xf0) == 0x70) /* For movd. */ |
2006 | 0 | bfd_put_8 (abfd, 0x54, contents + irel->r_offset + 1); |
2007 | 0 | else if ((code & 0xf0) == 0x20) /* For addd. */ |
2008 | 0 | bfd_put_8 (abfd, 0x60, contents + irel->r_offset + 1); |
2009 | 0 | else if ((code & 0xf0) == 0x90) /* For cmpd. */ |
2010 | 0 | bfd_put_8 (abfd, 0x56, contents + irel->r_offset + 1); |
2011 | 0 | else |
2012 | 0 | continue; |
2013 | | |
2014 | 0 | bfd_put_8 (abfd, 0xb0 | (code & 0xf), contents + irel->r_offset); |
2015 | | |
2016 | | /* If existing value is nagavive adjust approriately |
2017 | | place the 12-16bits (ie 4 bit) in new opcode, |
2018 | | as the 0xfffffxxx, the higher 2 byte values removed. */ |
2019 | 0 | if (value1 & 0x80000000) |
2020 | 0 | bfd_put_8 (abfd, |
2021 | 0 | (0x0f | (bfd_get_8 (abfd, |
2022 | 0 | contents + irel->r_offset))), |
2023 | 0 | contents + irel->r_offset); |
2024 | 0 | else |
2025 | 0 | bfd_put_16 (abfd, value1, contents + irel->r_offset + 2); |
2026 | | |
2027 | | |
2028 | | /* Fix the relocation's type. */ |
2029 | 0 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
2030 | 0 | R_CR16_IMM16); |
2031 | | |
2032 | | /* Delete two bytes of data. */ |
2033 | 0 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
2034 | 0 | irel->r_offset + 2, 2)) |
2035 | 0 | goto error_return; |
2036 | | |
2037 | | /* That will change things, so, we should relax again. |
2038 | | Note that this is not required, and it may be slow. */ |
2039 | 0 | *again = true; |
2040 | 0 | } |
2041 | 0 | } |
2042 | |
|
2043 | | #if 0 |
2044 | | /* Try to turn a 16bit immediate address into a 4bit |
2045 | | immediate address. */ |
2046 | | if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20) |
2047 | | || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM16)) |
2048 | | { |
2049 | | bfd_vma value = symval; |
2050 | | bfd_vma value1 = 0; |
2051 | | |
2052 | | /* Get the existing value from the mcode */ |
2053 | | value1 = ((bfd_get_16 (abfd, contents + irel->r_offset + 2) & 0xffff)); |
2054 | | |
2055 | | if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20) |
2056 | | { |
2057 | | value1 |= ((bfd_get_16 (abfd, contents + irel->r_offset + 1) |
2058 | | & 0xf000) << 0x4); |
2059 | | } |
2060 | | |
2061 | | /* See if the value will fit in 4 bits. */ |
2062 | | if ((((long) (value + value1)) < 0xf) |
2063 | | && (((long) (value + value1)) > 0)) |
2064 | | { |
2065 | | unsigned short code; |
2066 | | |
2067 | | /* Get the opcode. */ |
2068 | | code = bfd_get_16 (abfd, contents + irel->r_offset); |
2069 | | |
2070 | | /* Note that we've changed the relocs, section contents, etc. */ |
2071 | | elf_section_data (sec)->relocs = internal_relocs; |
2072 | | elf_section_data (sec)->this_hdr.contents = contents; |
2073 | | symtab_hdr->contents = (unsigned char *) isymbuf; |
2074 | | |
2075 | | /* Fix the opcode. */ |
2076 | | if (((code & 0x0f00) == 0x0400) || ((code & 0x0f00) == 0x0500)) |
2077 | | { |
2078 | | if ((code & 0x0f00) == 0x0400) /* For movd imm20. */ |
2079 | | bfd_put_8 (abfd, 0x60, contents + irel->r_offset); |
2080 | | else /* For addd imm20. */ |
2081 | | bfd_put_8 (abfd, 0x54, contents + irel->r_offset); |
2082 | | bfd_put_8 (abfd, (code & 0xf0) >> 4, |
2083 | | contents + irel->r_offset + 1); |
2084 | | } |
2085 | | else |
2086 | | { |
2087 | | if ((code & 0xfff0) == 0x56b0) /* For cmpd imm16. */ |
2088 | | bfd_put_8 (abfd, 0x56, contents + irel->r_offset); |
2089 | | else if ((code & 0xfff0) == 0x54b0) /* For movd imm16. */ |
2090 | | bfd_put_8 (abfd, 0x54, contents + irel->r_offset); |
2091 | | else if ((code & 0xfff0) == 0x58b0) /* For movb imm16. */ |
2092 | | bfd_put_8 (abfd, 0x58, contents + irel->r_offset); |
2093 | | else if ((code & 0xfff0) == 0x5Ab0) /* For movw imm16. */ |
2094 | | bfd_put_8 (abfd, 0x5A, contents + irel->r_offset); |
2095 | | else if ((code & 0xfff0) == 0x60b0) /* For addd imm16. */ |
2096 | | bfd_put_8 (abfd, 0x60, contents + irel->r_offset); |
2097 | | else if ((code & 0xfff0) == 0x30b0) /* For addb imm16. */ |
2098 | | bfd_put_8 (abfd, 0x30, contents + irel->r_offset); |
2099 | | else if ((code & 0xfff0) == 0x2Cb0) /* For addub imm16. */ |
2100 | | bfd_put_8 (abfd, 0x2C, contents + irel->r_offset); |
2101 | | else if ((code & 0xfff0) == 0x32b0) /* For adduw imm16. */ |
2102 | | bfd_put_8 (abfd, 0x32, contents + irel->r_offset); |
2103 | | else if ((code & 0xfff0) == 0x38b0) /* For subb imm16. */ |
2104 | | bfd_put_8 (abfd, 0x38, contents + irel->r_offset); |
2105 | | else if ((code & 0xfff0) == 0x3Cb0) /* For subcb imm16. */ |
2106 | | bfd_put_8 (abfd, 0x3C, contents + irel->r_offset); |
2107 | | else if ((code & 0xfff0) == 0x3Fb0) /* For subcw imm16. */ |
2108 | | bfd_put_8 (abfd, 0x3F, contents + irel->r_offset); |
2109 | | else if ((code & 0xfff0) == 0x3Ab0) /* For subw imm16. */ |
2110 | | bfd_put_8 (abfd, 0x3A, contents + irel->r_offset); |
2111 | | else if ((code & 0xfff0) == 0x50b0) /* For cmpb imm16. */ |
2112 | | bfd_put_8 (abfd, 0x50, contents + irel->r_offset); |
2113 | | else if ((code & 0xfff0) == 0x52b0) /* For cmpw imm16. */ |
2114 | | bfd_put_8 (abfd, 0x52, contents + irel->r_offset); |
2115 | | else |
2116 | | continue; |
2117 | | |
2118 | | bfd_put_8 (abfd, (code & 0xf), contents + irel->r_offset + 1); |
2119 | | } |
2120 | | |
2121 | | /* Fix the relocation's type. */ |
2122 | | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
2123 | | R_CR16_IMM4); |
2124 | | |
2125 | | /* Delete two bytes of data. */ |
2126 | | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
2127 | | irel->r_offset + 2, 2)) |
2128 | | goto error_return; |
2129 | | |
2130 | | /* That will change things, so, we should relax again. |
2131 | | Note that this is not required, and it may be slow. */ |
2132 | | *again = true; |
2133 | | } |
2134 | | } |
2135 | | #endif |
2136 | 0 | } |
2137 | | |
2138 | 0 | if (isymbuf != NULL |
2139 | 0 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
2140 | 0 | { |
2141 | 0 | if (! link_info->keep_memory) |
2142 | 0 | free (isymbuf); |
2143 | 0 | else |
2144 | | /* Cache the symbols for elf_link_input_bfd. */ |
2145 | 0 | symtab_hdr->contents = (unsigned char *) isymbuf; |
2146 | 0 | } |
2147 | |
|
2148 | 0 | if (contents != NULL |
2149 | 0 | && elf_section_data (sec)->this_hdr.contents != contents) |
2150 | 0 | { |
2151 | 0 | if (! link_info->keep_memory) |
2152 | 0 | free (contents); |
2153 | 0 | else |
2154 | | /* Cache the section contents for elf_link_input_bfd. */ |
2155 | 0 | elf_section_data (sec)->this_hdr.contents = contents; |
2156 | |
|
2157 | 0 | } |
2158 | |
|
2159 | 0 | if (elf_section_data (sec)->relocs != internal_relocs) |
2160 | 0 | free (internal_relocs); |
2161 | |
|
2162 | 0 | return true; |
2163 | | |
2164 | 0 | error_return: |
2165 | 0 | if (symtab_hdr->contents != (unsigned char *) isymbuf) |
2166 | 0 | free (isymbuf); |
2167 | 0 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2168 | 0 | free (contents); |
2169 | 0 | if (elf_section_data (sec)->relocs != internal_relocs) |
2170 | 0 | free (internal_relocs); |
2171 | |
|
2172 | 0 | return false; |
2173 | 0 | } |
2174 | | |
2175 | | static asection * |
2176 | | elf32_cr16_gc_mark_hook (asection *sec, |
2177 | | struct bfd_link_info *info, |
2178 | | Elf_Internal_Rela *rel, |
2179 | | struct elf_link_hash_entry *h, |
2180 | | Elf_Internal_Sym *sym) |
2181 | 0 | { |
2182 | 0 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
2183 | 0 | } |
2184 | | |
2185 | | /* Create dynamic sections when linking against a dynamic object. */ |
2186 | | |
2187 | | static bool |
2188 | | _bfd_cr16_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
2189 | 0 | { |
2190 | 0 | flagword flags; |
2191 | 0 | asection * s; |
2192 | 0 | const struct elf_backend_data * bed = get_elf_backend_data (abfd); |
2193 | 0 | struct elf_link_hash_table *htab = elf_hash_table (info); |
2194 | 0 | int ptralign = 0; |
2195 | |
|
2196 | 0 | switch (bed->s->arch_size) |
2197 | 0 | { |
2198 | 0 | case 16: |
2199 | 0 | ptralign = 1; |
2200 | 0 | break; |
2201 | | |
2202 | 0 | case 32: |
2203 | 0 | ptralign = 2; |
2204 | 0 | break; |
2205 | | |
2206 | 0 | default: |
2207 | 0 | bfd_set_error (bfd_error_bad_value); |
2208 | 0 | return false; |
2209 | 0 | } |
2210 | | |
2211 | | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
2212 | | .rel[a].bss sections. */ |
2213 | | |
2214 | 0 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
2215 | 0 | | SEC_LINKER_CREATED); |
2216 | |
|
2217 | 0 | s = bfd_make_section_anyway_with_flags (abfd, |
2218 | 0 | (bed->default_use_rela_p |
2219 | 0 | ? ".rela.plt" : ".rel.plt"), |
2220 | 0 | flags | SEC_READONLY); |
2221 | 0 | htab->srelplt = s; |
2222 | 0 | if (s == NULL |
2223 | 0 | || !bfd_set_section_alignment (s, ptralign)) |
2224 | 0 | return false; |
2225 | | |
2226 | 0 | if (! _bfd_cr16_elf_create_got_section (abfd, info)) |
2227 | 0 | return false; |
2228 | | |
2229 | 0 | if (bed->want_dynbss) |
2230 | 0 | { |
2231 | | /* The .dynbss section is a place to put symbols which are defined |
2232 | | by dynamic objects, are referenced by regular objects, and are |
2233 | | not functions. We must allocate space for them in the process |
2234 | | image and use a R_*_COPY reloc to tell the dynamic linker to |
2235 | | initialize them at run time. The linker script puts the .dynbss |
2236 | | section into the .bss section of the final image. */ |
2237 | 0 | s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", |
2238 | 0 | SEC_ALLOC | SEC_LINKER_CREATED); |
2239 | 0 | if (s == NULL) |
2240 | 0 | return false; |
2241 | | |
2242 | | /* The .rel[a].bss section holds copy relocs. This section is not |
2243 | | normally needed. We need to create it here, though, so that the |
2244 | | linker will map it to an output section. We can't just create it |
2245 | | only if we need it, because we will not know whether we need it |
2246 | | until we have seen all the input files, and the first time the |
2247 | | main linker code calls BFD after examining all the input files |
2248 | | (size_dynamic_sections) the input sections have already been |
2249 | | mapped to the output sections. If the section turns out not to |
2250 | | be needed, we can discard it later. We will never need this |
2251 | | section when generating a shared object, since they do not use |
2252 | | copy relocs. */ |
2253 | 0 | if (! bfd_link_executable (info)) |
2254 | 0 | { |
2255 | 0 | s = bfd_make_section_anyway_with_flags (abfd, |
2256 | 0 | (bed->default_use_rela_p |
2257 | 0 | ? ".rela.bss" : ".rel.bss"), |
2258 | 0 | flags | SEC_READONLY); |
2259 | 0 | if (s == NULL |
2260 | 0 | || !bfd_set_section_alignment (s, ptralign)) |
2261 | 0 | return false; |
2262 | 0 | } |
2263 | 0 | } |
2264 | | |
2265 | 0 | return true; |
2266 | 0 | } |
2267 | | |
2268 | | /* Adjust a symbol defined by a dynamic object and referenced by a |
2269 | | regular object. The current definition is in some section of the |
2270 | | dynamic object, but we're not including those sections. We have to |
2271 | | change the definition to something the rest of the link can |
2272 | | understand. */ |
2273 | | |
2274 | | static bool |
2275 | | _bfd_cr16_elf_adjust_dynamic_symbol (struct bfd_link_info * info, |
2276 | | struct elf_link_hash_entry * h) |
2277 | 0 | { |
2278 | 0 | bfd * dynobj; |
2279 | 0 | asection * s; |
2280 | |
|
2281 | 0 | dynobj = elf_hash_table (info)->dynobj; |
2282 | | |
2283 | | /* Make sure we know what is going on here. */ |
2284 | 0 | BFD_ASSERT (dynobj != NULL |
2285 | 0 | && (h->needs_plt |
2286 | 0 | || h->is_weakalias |
2287 | 0 | || (h->def_dynamic |
2288 | 0 | && h->ref_regular |
2289 | 0 | && !h->def_regular))); |
2290 | | |
2291 | | /* If this is a function, put it in the procedure linkage table. We |
2292 | | will fill in the contents of the procedure linkage table later, |
2293 | | when we know the address of the .got section. */ |
2294 | 0 | if (h->type == STT_FUNC |
2295 | 0 | || h->needs_plt) |
2296 | 0 | { |
2297 | 0 | if (! bfd_link_executable (info) |
2298 | 0 | && !h->def_dynamic |
2299 | 0 | && !h->ref_dynamic) |
2300 | 0 | { |
2301 | | /* This case can occur if we saw a PLT reloc in an input |
2302 | | file, but the symbol was never referred to by a dynamic |
2303 | | object. In such a case, we don't actually need to build |
2304 | | a procedure linkage table, and we can just do a REL32 |
2305 | | reloc instead. */ |
2306 | 0 | BFD_ASSERT (h->needs_plt); |
2307 | 0 | return true; |
2308 | 0 | } |
2309 | | |
2310 | | /* Make sure this symbol is output as a dynamic symbol. */ |
2311 | 0 | if (h->dynindx == -1) |
2312 | 0 | { |
2313 | 0 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
2314 | 0 | return false; |
2315 | 0 | } |
2316 | | |
2317 | | /* We also need to make an entry in the .got.plt section, which |
2318 | | will be placed in the .got section by the linker script. */ |
2319 | | |
2320 | 0 | s = elf_hash_table (info)->sgotplt; |
2321 | 0 | BFD_ASSERT (s != NULL); |
2322 | 0 | s->size += 4; |
2323 | | |
2324 | | /* We also need to make an entry in the .rela.plt section. */ |
2325 | |
|
2326 | 0 | s = elf_hash_table (info)->srelplt; |
2327 | 0 | BFD_ASSERT (s != NULL); |
2328 | 0 | s->size += sizeof (Elf32_External_Rela); |
2329 | |
|
2330 | 0 | return true; |
2331 | 0 | } |
2332 | | |
2333 | | /* If this is a weak symbol, and there is a real definition, the |
2334 | | processor independent code will have arranged for us to see the |
2335 | | real definition first, and we can just use the same value. */ |
2336 | 0 | if (h->is_weakalias) |
2337 | 0 | { |
2338 | 0 | struct elf_link_hash_entry *def = weakdef (h); |
2339 | 0 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
2340 | 0 | h->root.u.def.section = def->root.u.def.section; |
2341 | 0 | h->root.u.def.value = def->root.u.def.value; |
2342 | 0 | return true; |
2343 | 0 | } |
2344 | | |
2345 | | /* This is a reference to a symbol defined by a dynamic object which |
2346 | | is not a function. */ |
2347 | | |
2348 | | /* If we are creating a shared library, we must presume that the |
2349 | | only references to the symbol are via the global offset table. |
2350 | | For such cases we need not do anything here; the relocations will |
2351 | | be handled correctly by relocate_section. */ |
2352 | 0 | if (bfd_link_executable (info)) |
2353 | 0 | return true; |
2354 | | |
2355 | | /* If there are no references to this symbol that do not use the |
2356 | | GOT, we don't need to generate a copy reloc. */ |
2357 | 0 | if (!h->non_got_ref) |
2358 | 0 | return true; |
2359 | | |
2360 | | /* We must allocate the symbol in our .dynbss section, which will |
2361 | | become part of the .bss section of the executable. There will be |
2362 | | an entry for this symbol in the .dynsym section. The dynamic |
2363 | | object will contain position independent code, so all references |
2364 | | from the dynamic object to this symbol will go through the global |
2365 | | offset table. The dynamic linker will use the .dynsym entry to |
2366 | | determine the address it must put in the global offset table, so |
2367 | | both the dynamic object and the regular object will refer to the |
2368 | | same memory location for the variable. */ |
2369 | | |
2370 | 0 | s = bfd_get_linker_section (dynobj, ".dynbss"); |
2371 | 0 | BFD_ASSERT (s != NULL); |
2372 | | |
2373 | | /* We must generate a R_CR16_COPY reloc to tell the dynamic linker to |
2374 | | copy the initial value out of the dynamic object and into the |
2375 | | runtime process image. We need to remember the offset into the |
2376 | | .rela.bss section we are going to use. */ |
2377 | 0 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
2378 | 0 | { |
2379 | 0 | asection * srel; |
2380 | |
|
2381 | 0 | srel = bfd_get_linker_section (dynobj, ".rela.bss"); |
2382 | 0 | BFD_ASSERT (srel != NULL); |
2383 | 0 | srel->size += sizeof (Elf32_External_Rela); |
2384 | 0 | h->needs_copy = 1; |
2385 | 0 | } |
2386 | |
|
2387 | 0 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
2388 | 0 | } |
2389 | | |
2390 | | /* Set the sizes of the dynamic sections. */ |
2391 | | |
2392 | | static bool |
2393 | | _bfd_cr16_elf_late_size_sections (bfd * output_bfd, |
2394 | | struct bfd_link_info * info) |
2395 | 0 | { |
2396 | 0 | bfd * dynobj; |
2397 | 0 | asection * s; |
2398 | 0 | bool relocs; |
2399 | |
|
2400 | 0 | dynobj = elf_hash_table (info)->dynobj; |
2401 | 0 | if (dynobj == NULL) |
2402 | 0 | return true; |
2403 | | |
2404 | 0 | if (elf_hash_table (info)->dynamic_sections_created) |
2405 | 0 | { |
2406 | | /* Set the contents of the .interp section to the interpreter. */ |
2407 | 0 | if (bfd_link_executable (info) && !info->nointerp) |
2408 | 0 | { |
2409 | | #if 0 |
2410 | | s = bfd_get_linker_section (dynobj, ".interp"); |
2411 | | BFD_ASSERT (s != NULL); |
2412 | | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
2413 | | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2414 | | s->alloced = 1; |
2415 | | #endif |
2416 | 0 | } |
2417 | 0 | } |
2418 | 0 | else |
2419 | 0 | { |
2420 | | /* We may have created entries in the .rela.got section. |
2421 | | However, if we are not creating the dynamic sections, we will |
2422 | | not actually use these entries. Reset the size of .rela.got, |
2423 | | which will cause it to get stripped from the output file |
2424 | | below. */ |
2425 | 0 | s = elf_hash_table (info)->srelgot; |
2426 | 0 | if (s != NULL) |
2427 | 0 | s->size = 0; |
2428 | 0 | } |
2429 | | |
2430 | | /* The check_relocs and adjust_dynamic_symbol entry points have |
2431 | | determined the sizes of the various dynamic sections. Allocate |
2432 | | memory for them. */ |
2433 | 0 | relocs = false; |
2434 | 0 | for (s = dynobj->sections; s != NULL; s = s->next) |
2435 | 0 | { |
2436 | 0 | const char * name; |
2437 | |
|
2438 | 0 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
2439 | 0 | continue; |
2440 | | |
2441 | | /* It's OK to base decisions on the section name, because none |
2442 | | of the dynobj section names depend upon the input files. */ |
2443 | 0 | name = bfd_section_name (s); |
2444 | |
|
2445 | 0 | if (strcmp (name, ".plt") == 0) |
2446 | 0 | { |
2447 | | /* Remember whether there is a PLT. */ |
2448 | 0 | ; |
2449 | 0 | } |
2450 | 0 | else if (startswith (name, ".rela")) |
2451 | 0 | { |
2452 | 0 | if (s->size != 0) |
2453 | 0 | { |
2454 | | /* Remember whether there are any reloc sections other |
2455 | | than .rela.plt. */ |
2456 | 0 | if (strcmp (name, ".rela.plt") != 0) |
2457 | 0 | relocs = true; |
2458 | | |
2459 | | /* We use the reloc_count field as a counter if we need |
2460 | | to copy relocs into the output file. */ |
2461 | 0 | s->reloc_count = 0; |
2462 | 0 | } |
2463 | 0 | } |
2464 | 0 | else if (! startswith (name, ".got") |
2465 | 0 | && strcmp (name, ".dynbss") != 0) |
2466 | | /* It's not one of our sections, so don't allocate space. */ |
2467 | 0 | continue; |
2468 | | |
2469 | 0 | if (s->size == 0) |
2470 | 0 | { |
2471 | | /* If we don't need this section, strip it from the |
2472 | | output file. This is mostly to handle .rela.bss and |
2473 | | .rela.plt. We must create both sections in |
2474 | | create_dynamic_sections, because they must be created |
2475 | | before the linker maps input sections to output |
2476 | | sections. The linker does that before |
2477 | | adjust_dynamic_symbol is called, and it is that |
2478 | | function which decides whether anything needs to go |
2479 | | into these sections. */ |
2480 | 0 | s->flags |= SEC_EXCLUDE; |
2481 | 0 | continue; |
2482 | 0 | } |
2483 | | |
2484 | 0 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2485 | 0 | continue; |
2486 | | |
2487 | | /* Allocate memory for the section contents. We use bfd_zalloc |
2488 | | here in case unused entries are not reclaimed before the |
2489 | | section's contents are written out. This should not happen, |
2490 | | but this way if it does, we get a R_CR16_NONE reloc |
2491 | | instead of garbage. */ |
2492 | 0 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
2493 | 0 | if (s->contents == NULL) |
2494 | 0 | return false; |
2495 | 0 | s->alloced = 1; |
2496 | 0 | } |
2497 | | |
2498 | 0 | return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs); |
2499 | 0 | } |
2500 | | |
2501 | | /* Finish up dynamic symbol handling. We set the contents of various |
2502 | | dynamic sections here. */ |
2503 | | |
2504 | | static bool |
2505 | | _bfd_cr16_elf_finish_dynamic_symbol (bfd * output_bfd, |
2506 | | struct bfd_link_info * info, |
2507 | | struct elf_link_hash_entry * h, |
2508 | | Elf_Internal_Sym * sym) |
2509 | 0 | { |
2510 | 0 | bfd * dynobj; |
2511 | |
|
2512 | 0 | dynobj = elf_hash_table (info)->dynobj; |
2513 | |
|
2514 | 0 | if (h->got.offset != (bfd_vma) -1) |
2515 | 0 | { |
2516 | 0 | asection * sgot; |
2517 | 0 | asection * srel; |
2518 | 0 | Elf_Internal_Rela rel; |
2519 | | |
2520 | | /* This symbol has an entry in the global offset table. Set it up. */ |
2521 | |
|
2522 | 0 | sgot = elf_hash_table (info)->sgot; |
2523 | 0 | srel = elf_hash_table (info)->srelgot; |
2524 | 0 | BFD_ASSERT (sgot != NULL && srel != NULL); |
2525 | |
|
2526 | 0 | rel.r_offset = (sgot->output_section->vma |
2527 | 0 | + sgot->output_offset |
2528 | 0 | + (h->got.offset & ~1)); |
2529 | | |
2530 | | /* If this is a -Bsymbolic link, and the symbol is defined |
2531 | | locally, we just want to emit a RELATIVE reloc. Likewise if |
2532 | | the symbol was forced to be local because of a version file. |
2533 | | The entry in the global offset table will already have been |
2534 | | initialized in the relocate_section function. */ |
2535 | 0 | if (bfd_link_executable (info) |
2536 | 0 | && (info->symbolic || h->dynindx == -1) |
2537 | 0 | && h->def_regular) |
2538 | 0 | { |
2539 | 0 | rel.r_info = ELF32_R_INFO (0, R_CR16_GOT_REGREL20); |
2540 | 0 | rel.r_addend = (h->root.u.def.value |
2541 | 0 | + h->root.u.def.section->output_section->vma |
2542 | 0 | + h->root.u.def.section->output_offset); |
2543 | 0 | } |
2544 | 0 | else |
2545 | 0 | { |
2546 | 0 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
2547 | 0 | rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20); |
2548 | 0 | rel.r_addend = 0; |
2549 | 0 | } |
2550 | |
|
2551 | 0 | bfd_elf32_swap_reloca_out (output_bfd, &rel, |
2552 | 0 | (bfd_byte *) ((Elf32_External_Rela *) srel->contents |
2553 | 0 | + srel->reloc_count)); |
2554 | 0 | ++ srel->reloc_count; |
2555 | 0 | } |
2556 | |
|
2557 | 0 | if (h->needs_copy) |
2558 | 0 | { |
2559 | 0 | asection * s; |
2560 | 0 | Elf_Internal_Rela rel; |
2561 | | |
2562 | | /* This symbol needs a copy reloc. Set it up. */ |
2563 | 0 | BFD_ASSERT (h->dynindx != -1 |
2564 | 0 | && (h->root.type == bfd_link_hash_defined |
2565 | 0 | || h->root.type == bfd_link_hash_defweak)); |
2566 | |
|
2567 | 0 | s = bfd_get_linker_section (dynobj, ".rela.bss"); |
2568 | 0 | BFD_ASSERT (s != NULL); |
2569 | |
|
2570 | 0 | rel.r_offset = (h->root.u.def.value |
2571 | 0 | + h->root.u.def.section->output_section->vma |
2572 | 0 | + h->root.u.def.section->output_offset); |
2573 | 0 | rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20); |
2574 | 0 | rel.r_addend = 0; |
2575 | 0 | bfd_elf32_swap_reloca_out (output_bfd, &rel, |
2576 | 0 | (bfd_byte *) ((Elf32_External_Rela *) s->contents |
2577 | 0 | + s->reloc_count)); |
2578 | 0 | ++ s->reloc_count; |
2579 | 0 | } |
2580 | | |
2581 | | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
2582 | 0 | if (h == elf_hash_table (info)->hdynamic |
2583 | 0 | || h == elf_hash_table (info)->hgot) |
2584 | 0 | sym->st_shndx = SHN_ABS; |
2585 | |
|
2586 | 0 | return true; |
2587 | 0 | } |
2588 | | |
2589 | | /* Finish up the dynamic sections. */ |
2590 | | |
2591 | | static bool |
2592 | | _bfd_cr16_elf_finish_dynamic_sections (bfd * output_bfd, |
2593 | | struct bfd_link_info * info) |
2594 | 0 | { |
2595 | 0 | bfd * dynobj; |
2596 | 0 | asection * sgot; |
2597 | 0 | asection * sdyn; |
2598 | |
|
2599 | 0 | dynobj = elf_hash_table (info)->dynobj; |
2600 | |
|
2601 | 0 | sgot = elf_hash_table (info)->sgotplt; |
2602 | 0 | BFD_ASSERT (sgot != NULL); |
2603 | 0 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
2604 | |
|
2605 | 0 | if (elf_hash_table (info)->dynamic_sections_created) |
2606 | 0 | { |
2607 | 0 | Elf32_External_Dyn * dyncon; |
2608 | 0 | Elf32_External_Dyn * dynconend; |
2609 | |
|
2610 | 0 | BFD_ASSERT (sdyn != NULL); |
2611 | |
|
2612 | 0 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
2613 | 0 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
2614 | |
|
2615 | 0 | for (; dyncon < dynconend; dyncon++) |
2616 | 0 | { |
2617 | 0 | Elf_Internal_Dyn dyn; |
2618 | 0 | asection * s; |
2619 | |
|
2620 | 0 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
2621 | |
|
2622 | 0 | switch (dyn.d_tag) |
2623 | 0 | { |
2624 | 0 | default: |
2625 | 0 | break; |
2626 | | |
2627 | 0 | case DT_PLTGOT: |
2628 | 0 | s = elf_hash_table (info)->sgotplt; |
2629 | 0 | goto get_vma; |
2630 | | |
2631 | 0 | case DT_JMPREL: |
2632 | 0 | s = elf_hash_table (info)->srelplt; |
2633 | 0 | get_vma: |
2634 | 0 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
2635 | 0 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
2636 | 0 | break; |
2637 | | |
2638 | 0 | case DT_PLTRELSZ: |
2639 | 0 | s = elf_hash_table (info)->srelplt; |
2640 | 0 | dyn.d_un.d_val = s->size; |
2641 | 0 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
2642 | 0 | break; |
2643 | 0 | } |
2644 | 0 | } |
2645 | |
|
2646 | 0 | } |
2647 | | |
2648 | | /* Fill in the first three entries in the global offset table. */ |
2649 | 0 | if (sgot->size > 0) |
2650 | 0 | { |
2651 | 0 | if (sdyn == NULL) |
2652 | 0 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
2653 | 0 | else |
2654 | 0 | bfd_put_32 (output_bfd, |
2655 | 0 | sdyn->output_section->vma + sdyn->output_offset, |
2656 | 0 | sgot->contents); |
2657 | 0 | } |
2658 | |
|
2659 | 0 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
2660 | |
|
2661 | 0 | return true; |
2662 | 0 | } |
2663 | | |
2664 | | /* Given a .data.rel section and a .emreloc in-memory section, store |
2665 | | relocation information into the .emreloc section which can be |
2666 | | used at runtime to relocate the section. This is called by the |
2667 | | linker when the --embedded-relocs switch is used. This is called |
2668 | | after the add_symbols entry point has been called for all the |
2669 | | objects, and before the final_link entry point is called. */ |
2670 | | |
2671 | | bool |
2672 | | bfd_cr16_elf32_create_embedded_relocs (bfd *abfd, |
2673 | | struct bfd_link_info *info, |
2674 | | asection *datasec, |
2675 | | asection *relsec, |
2676 | | char **errmsg) |
2677 | 0 | { |
2678 | 0 | Elf_Internal_Shdr *symtab_hdr; |
2679 | 0 | Elf_Internal_Sym *isymbuf = NULL; |
2680 | 0 | Elf_Internal_Rela *internal_relocs = NULL; |
2681 | 0 | Elf_Internal_Rela *irel, *irelend; |
2682 | 0 | bfd_byte *p; |
2683 | 0 | bfd_size_type amt; |
2684 | |
|
2685 | 0 | BFD_ASSERT (! bfd_link_relocatable (info)); |
2686 | |
|
2687 | 0 | *errmsg = NULL; |
2688 | |
|
2689 | 0 | if (datasec->reloc_count == 0) |
2690 | 0 | return true; |
2691 | | |
2692 | 0 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2693 | | |
2694 | | /* Get a copy of the native relocations. */ |
2695 | 0 | internal_relocs = (_bfd_elf_link_read_relocs |
2696 | 0 | (abfd, datasec, NULL, NULL, info->keep_memory)); |
2697 | 0 | if (internal_relocs == NULL) |
2698 | 0 | goto error_return; |
2699 | | |
2700 | 0 | amt = (bfd_size_type) datasec->reloc_count * 8; |
2701 | 0 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); |
2702 | 0 | if (relsec->contents == NULL) |
2703 | 0 | goto error_return; |
2704 | 0 | relsec->alloced = 1; |
2705 | |
|
2706 | 0 | p = relsec->contents; |
2707 | |
|
2708 | 0 | irelend = internal_relocs + datasec->reloc_count; |
2709 | 0 | for (irel = internal_relocs; irel < irelend; irel++, p += 8) |
2710 | 0 | { |
2711 | 0 | asection *targetsec; |
2712 | | |
2713 | | /* We are going to write a four byte longword into the runtime |
2714 | | reloc section. The longword will be the address in the data |
2715 | | section which must be relocated. It is followed by the name |
2716 | | of the target section NUL-padded or truncated to 8 |
2717 | | characters. */ |
2718 | | |
2719 | | /* We can only relocate absolute longword relocs at run time. */ |
2720 | 0 | if (!((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a) |
2721 | 0 | || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32))) |
2722 | 0 | { |
2723 | 0 | *errmsg = _("unsupported relocation type"); |
2724 | 0 | bfd_set_error (bfd_error_bad_value); |
2725 | 0 | goto error_return; |
2726 | 0 | } |
2727 | | |
2728 | | /* Get the target section referred to by the reloc. */ |
2729 | 0 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
2730 | 0 | { |
2731 | | /* A local symbol. */ |
2732 | 0 | Elf_Internal_Sym *isym; |
2733 | | |
2734 | | /* Read this BFD's local symbols if we haven't done so already. */ |
2735 | 0 | if (isymbuf == NULL) |
2736 | 0 | { |
2737 | 0 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
2738 | 0 | if (isymbuf == NULL) |
2739 | 0 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
2740 | 0 | symtab_hdr->sh_info, 0, |
2741 | 0 | NULL, NULL, NULL); |
2742 | 0 | if (isymbuf == NULL) |
2743 | 0 | goto error_return; |
2744 | 0 | } |
2745 | | |
2746 | 0 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
2747 | 0 | targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
2748 | 0 | } |
2749 | 0 | else |
2750 | 0 | { |
2751 | 0 | unsigned long indx; |
2752 | 0 | struct elf_link_hash_entry *h; |
2753 | | |
2754 | | /* An external symbol. */ |
2755 | 0 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
2756 | 0 | h = elf_sym_hashes (abfd)[indx]; |
2757 | 0 | BFD_ASSERT (h != NULL); |
2758 | 0 | if (h->root.type == bfd_link_hash_defined |
2759 | 0 | || h->root.type == bfd_link_hash_defweak) |
2760 | 0 | targetsec = h->root.u.def.section; |
2761 | 0 | else |
2762 | 0 | targetsec = NULL; |
2763 | 0 | } |
2764 | | |
2765 | 0 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); |
2766 | 0 | memset (p + 4, 0, 4); |
2767 | 0 | if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a) |
2768 | 0 | && (targetsec != NULL) ) |
2769 | 0 | strncpy ((char *) p + 4, targetsec->output_section->name, 4); |
2770 | 0 | } |
2771 | | |
2772 | 0 | if (symtab_hdr->contents != (unsigned char *) isymbuf) |
2773 | 0 | free (isymbuf); |
2774 | 0 | if (elf_section_data (datasec)->relocs != internal_relocs) |
2775 | 0 | free (internal_relocs); |
2776 | 0 | return true; |
2777 | | |
2778 | 0 | error_return: |
2779 | 0 | if (symtab_hdr->contents != (unsigned char *) isymbuf) |
2780 | 0 | free (isymbuf); |
2781 | 0 | if (elf_section_data (datasec)->relocs != internal_relocs) |
2782 | 0 | free (internal_relocs); |
2783 | 0 | return false; |
2784 | 0 | } |
2785 | | |
2786 | | |
2787 | | /* Classify relocation types, such that combreloc can sort them |
2788 | | properly. */ |
2789 | | |
2790 | | static enum elf_reloc_type_class |
2791 | | _bfd_cr16_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
2792 | | const asection *rel_sec ATTRIBUTE_UNUSED, |
2793 | | const Elf_Internal_Rela *rela) |
2794 | 0 | { |
2795 | 0 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
2796 | 0 | { |
2797 | 0 | case R_CR16_GOT_REGREL20: |
2798 | 0 | case R_CR16_GOTC_REGREL20: |
2799 | 0 | return reloc_class_relative; |
2800 | 0 | default: |
2801 | 0 | return reloc_class_normal; |
2802 | 0 | } |
2803 | 0 | } |
2804 | | |
2805 | | /* Definitions for setting CR16 target vector. */ |
2806 | | #define TARGET_LITTLE_SYM cr16_elf32_vec |
2807 | | #define TARGET_LITTLE_NAME "elf32-cr16" |
2808 | | #define ELF_ARCH bfd_arch_cr16 |
2809 | | #define ELF_TARGET_ID CR16_ELF_DATA |
2810 | | #define ELF_MACHINE_CODE EM_CR16 |
2811 | | #define ELF_MACHINE_ALT1 EM_CR16_OLD |
2812 | | #define ELF_MAXPAGESIZE 0x1 |
2813 | | #define elf_symbol_leading_char '_' |
2814 | | |
2815 | | #define bfd_elf32_bfd_reloc_type_lookup elf_cr16_reloc_type_lookup |
2816 | | #define bfd_elf32_bfd_reloc_name_lookup elf_cr16_reloc_name_lookup |
2817 | | #define elf_info_to_howto elf_cr16_info_to_howto |
2818 | | #define elf_info_to_howto_rel NULL |
2819 | | #define elf_backend_relocate_section elf32_cr16_relocate_section |
2820 | | #define bfd_elf32_bfd_relax_section elf32_cr16_relax_section |
2821 | | #define bfd_elf32_bfd_get_relocated_section_contents \ |
2822 | | elf32_cr16_get_relocated_section_contents |
2823 | | #define elf_backend_gc_mark_hook elf32_cr16_gc_mark_hook |
2824 | | #define elf_backend_can_gc_sections 1 |
2825 | | #define elf_backend_rela_normal 1 |
2826 | | #define elf_backend_check_relocs cr16_elf_check_relocs |
2827 | | /* So we can set bits in e_flags. */ |
2828 | | #define elf_backend_final_write_processing \ |
2829 | | _bfd_cr16_elf_final_write_processing |
2830 | | #define elf_backend_object_p _bfd_cr16_elf_object_p |
2831 | | |
2832 | | #define bfd_elf32_bfd_merge_private_bfd_data \ |
2833 | | _bfd_cr16_elf_merge_private_bfd_data |
2834 | | |
2835 | | |
2836 | | #define bfd_elf32_bfd_link_hash_table_create \ |
2837 | | elf32_cr16_link_hash_table_create |
2838 | | |
2839 | | #define elf_backend_create_dynamic_sections \ |
2840 | | _bfd_cr16_elf_create_dynamic_sections |
2841 | | #define elf_backend_adjust_dynamic_symbol \ |
2842 | | _bfd_cr16_elf_adjust_dynamic_symbol |
2843 | | #define elf_backend_late_size_sections \ |
2844 | | _bfd_cr16_elf_late_size_sections |
2845 | | #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all |
2846 | | #define elf_backend_finish_dynamic_symbol \ |
2847 | | _bfd_cr16_elf_finish_dynamic_symbol |
2848 | | #define elf_backend_finish_dynamic_sections \ |
2849 | | _bfd_cr16_elf_finish_dynamic_sections |
2850 | | |
2851 | | #define elf_backend_reloc_type_class _bfd_cr16_elf_reloc_type_class |
2852 | | |
2853 | | |
2854 | | #define elf_backend_want_got_plt 1 |
2855 | | #define elf_backend_plt_readonly 1 |
2856 | | #define elf_backend_want_plt_sym 0 |
2857 | | #define elf_backend_got_header_size 12 |
2858 | | #define elf_backend_dtrel_excludes_plt 1 |
2859 | | |
2860 | | #include "elf32-target.h" |